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b164935b AK |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2008 Cavium Networks | |
6570b4a9 AK |
7 | * |
8 | * Some parts of the code were originally released under BSD license: | |
9 | * | |
10 | * Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights | |
11 | * reserved. | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or without | |
14 | * modification, are permitted provided that the following conditions are | |
15 | * met: | |
16 | * | |
17 | * * Redistributions of source code must retain the above copyright | |
18 | * notice, this list of conditions and the following disclaimer. | |
19 | * | |
20 | * * Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials provided | |
23 | * with the distribution. | |
24 | * | |
25 | * * Neither the name of Cavium Networks nor the names of | |
26 | * its contributors may be used to endorse or promote products | |
27 | * derived from this software without specific prior written | |
28 | * permission. | |
29 | * | |
30 | * This Software, including technical data, may be subject to U.S. export | |
31 | * control laws, including the U.S. Export Administration Act and its associated | |
32 | * regulations, and may be subject to export or import regulations in other | |
33 | * countries. | |
34 | * | |
35 | * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" | |
36 | * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR | |
37 | * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO | |
38 | * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION | |
39 | * OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM | |
40 | * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, | |
41 | * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF | |
42 | * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR | |
43 | * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR | |
44 | * PERFORMANCE OF THE SOFTWARE LIES WITH YOU. | |
b164935b AK |
45 | */ |
46 | #include <linux/kernel.h> | |
47 | #include <linux/module.h> | |
48 | #include <linux/init.h> | |
49 | #include <linux/pci.h> | |
50 | #include <linux/interrupt.h> | |
51 | #include <linux/platform_device.h> | |
b164935b AK |
52 | #include <linux/usb.h> |
53 | ||
2a81d2b0 AK |
54 | #include <linux/time.h> |
55 | #include <linux/delay.h> | |
b164935b AK |
56 | |
57 | #include <asm/octeon/cvmx.h> | |
b164935b AK |
58 | #include <asm/octeon/cvmx-iob-defs.h> |
59 | ||
60 | #include <linux/usb/hcd.h> | |
61 | ||
55fa328a DN |
62 | #include <linux/err.h> |
63 | ||
6570b4a9 AK |
64 | #include <asm/octeon/octeon.h> |
65 | #include <asm/octeon/cvmx-helper.h> | |
66 | #include <asm/octeon/cvmx-sysinfo.h> | |
67 | #include <asm/octeon/cvmx-helper-board.h> | |
68 | ||
f1219103 | 69 | #include "octeon-hcd.h" |
6570b4a9 AK |
70 | |
71 | /** | |
72 | * enum cvmx_usb_speed - the possible USB device speeds | |
73 | * | |
74 | * @CVMX_USB_SPEED_HIGH: Device is operation at 480Mbps | |
75 | * @CVMX_USB_SPEED_FULL: Device is operation at 12Mbps | |
76 | * @CVMX_USB_SPEED_LOW: Device is operation at 1.5Mbps | |
77 | */ | |
78 | enum cvmx_usb_speed { | |
79 | CVMX_USB_SPEED_HIGH = 0, | |
80 | CVMX_USB_SPEED_FULL = 1, | |
81 | CVMX_USB_SPEED_LOW = 2, | |
82 | }; | |
83 | ||
84 | /** | |
85 | * enum cvmx_usb_transfer - the possible USB transfer types | |
86 | * | |
87 | * @CVMX_USB_TRANSFER_CONTROL: USB transfer type control for hub and status | |
88 | * transfers | |
89 | * @CVMX_USB_TRANSFER_ISOCHRONOUS: USB transfer type isochronous for low | |
90 | * priority periodic transfers | |
91 | * @CVMX_USB_TRANSFER_BULK: USB transfer type bulk for large low priority | |
92 | * transfers | |
93 | * @CVMX_USB_TRANSFER_INTERRUPT: USB transfer type interrupt for high priority | |
94 | * periodic transfers | |
95 | */ | |
96 | enum cvmx_usb_transfer { | |
97 | CVMX_USB_TRANSFER_CONTROL = 0, | |
98 | CVMX_USB_TRANSFER_ISOCHRONOUS = 1, | |
99 | CVMX_USB_TRANSFER_BULK = 2, | |
100 | CVMX_USB_TRANSFER_INTERRUPT = 3, | |
101 | }; | |
102 | ||
103 | /** | |
104 | * enum cvmx_usb_direction - the transfer directions | |
105 | * | |
106 | * @CVMX_USB_DIRECTION_OUT: Data is transferring from Octeon to the device/host | |
107 | * @CVMX_USB_DIRECTION_IN: Data is transferring from the device/host to Octeon | |
108 | */ | |
109 | enum cvmx_usb_direction { | |
110 | CVMX_USB_DIRECTION_OUT, | |
111 | CVMX_USB_DIRECTION_IN, | |
112 | }; | |
113 | ||
114 | /** | |
115 | * enum cvmx_usb_complete - possible callback function status codes | |
116 | * | |
117 | * @CVMX_USB_COMPLETE_SUCCESS: The transaction / operation finished without | |
118 | * any errors | |
119 | * @CVMX_USB_COMPLETE_SHORT: FIXME: This is currently not implemented | |
120 | * @CVMX_USB_COMPLETE_CANCEL: The transaction was canceled while in flight | |
121 | * by a user call to cvmx_usb_cancel | |
122 | * @CVMX_USB_COMPLETE_ERROR: The transaction aborted with an unexpected | |
123 | * error status | |
124 | * @CVMX_USB_COMPLETE_STALL: The transaction received a USB STALL response | |
125 | * from the device | |
126 | * @CVMX_USB_COMPLETE_XACTERR: The transaction failed with an error from the | |
127 | * device even after a number of retries | |
128 | * @CVMX_USB_COMPLETE_DATATGLERR: The transaction failed with a data toggle | |
129 | * error even after a number of retries | |
130 | * @CVMX_USB_COMPLETE_BABBLEERR: The transaction failed with a babble error | |
131 | * @CVMX_USB_COMPLETE_FRAMEERR: The transaction failed with a frame error | |
132 | * even after a number of retries | |
133 | */ | |
134 | enum cvmx_usb_complete { | |
135 | CVMX_USB_COMPLETE_SUCCESS, | |
136 | CVMX_USB_COMPLETE_SHORT, | |
137 | CVMX_USB_COMPLETE_CANCEL, | |
138 | CVMX_USB_COMPLETE_ERROR, | |
139 | CVMX_USB_COMPLETE_STALL, | |
140 | CVMX_USB_COMPLETE_XACTERR, | |
141 | CVMX_USB_COMPLETE_DATATGLERR, | |
142 | CVMX_USB_COMPLETE_BABBLEERR, | |
143 | CVMX_USB_COMPLETE_FRAMEERR, | |
144 | }; | |
145 | ||
146 | /** | |
147 | * struct cvmx_usb_port_status - the USB port status information | |
148 | * | |
149 | * @port_enabled: 1 = Usb port is enabled, 0 = disabled | |
150 | * @port_over_current: 1 = Over current detected, 0 = Over current not | |
151 | * detected. Octeon doesn't support over current detection. | |
152 | * @port_powered: 1 = Port power is being supplied to the device, 0 = | |
153 | * power is off. Octeon doesn't support turning port power | |
154 | * off. | |
155 | * @port_speed: Current port speed. | |
156 | * @connected: 1 = A device is connected to the port, 0 = No device is | |
157 | * connected. | |
158 | * @connect_change: 1 = Device connected state changed since the last set | |
159 | * status call. | |
160 | */ | |
161 | struct cvmx_usb_port_status { | |
162 | uint32_t reserved : 25; | |
163 | uint32_t port_enabled : 1; | |
164 | uint32_t port_over_current : 1; | |
165 | uint32_t port_powered : 1; | |
166 | enum cvmx_usb_speed port_speed : 2; | |
167 | uint32_t connected : 1; | |
168 | uint32_t connect_change : 1; | |
169 | }; | |
170 | ||
171 | /** | |
172 | * union cvmx_usb_control_header - the structure of a Control packet header | |
173 | * | |
174 | * @s.request_type: Bit 7 tells the direction: 1=IN, 0=OUT | |
175 | * @s.request The standard usb request to make | |
176 | * @s.value Value parameter for the request in little endian format | |
177 | * @s.index Index for the request in little endian format | |
178 | * @s.length Length of the data associated with this request in | |
179 | * little endian format | |
180 | */ | |
181 | union cvmx_usb_control_header { | |
182 | uint64_t u64; | |
183 | struct { | |
184 | uint64_t request_type : 8; | |
185 | uint64_t request : 8; | |
186 | uint64_t value : 16; | |
187 | uint64_t index : 16; | |
188 | uint64_t length : 16; | |
189 | } s; | |
190 | }; | |
191 | ||
192 | /** | |
193 | * struct cvmx_usb_iso_packet - descriptor for Isochronous packets | |
194 | * | |
195 | * @offset: This is the offset in bytes into the main buffer where this data | |
196 | * is stored. | |
197 | * @length: This is the length in bytes of the data. | |
198 | * @status: This is the status of this individual packet transfer. | |
199 | */ | |
200 | struct cvmx_usb_iso_packet { | |
201 | int offset; | |
202 | int length; | |
203 | enum cvmx_usb_complete status; | |
204 | }; | |
205 | ||
6570b4a9 AK |
206 | /** |
207 | * enum cvmx_usb_initialize_flags - flags used by the initialization function | |
208 | * | |
209 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI: The USB port uses a 12MHz crystal | |
210 | * as clock source at USB_XO and | |
211 | * USB_XI. | |
212 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND: The USB port uses 12/24/48MHz 2.5V | |
213 | * board clock source at USB_XO. | |
214 | * USB_XI should be tied to GND. | |
215 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK: Mask for clock speed field | |
216 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ: Speed of reference clock or | |
217 | * crystal | |
218 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ: Speed of reference clock | |
219 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ: Speed of reference clock | |
220 | * @CVMX_USB_INITIALIZE_FLAGS_NO_DMA: Disable DMA and used polled IO for | |
221 | * data transfer use for the USB | |
222 | */ | |
223 | enum cvmx_usb_initialize_flags { | |
224 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI = 1 << 0, | |
225 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND = 1 << 1, | |
226 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK = 3 << 3, | |
227 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ = 1 << 3, | |
228 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ = 2 << 3, | |
229 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ = 3 << 3, | |
230 | /* Bits 3-4 used to encode the clock frequency */ | |
231 | CVMX_USB_INITIALIZE_FLAGS_NO_DMA = 1 << 5, | |
232 | }; | |
233 | ||
234 | /** | |
235 | * enum cvmx_usb_pipe_flags - internal flags for a pipe. | |
236 | * | |
6570b4a9 AK |
237 | * @__CVMX_USB_PIPE_FLAGS_SCHEDULED: Used internally to determine if a pipe is |
238 | * actively using hardware. Do not use. | |
239 | * @__CVMX_USB_PIPE_FLAGS_NEED_PING: Used internally to determine if a high | |
240 | * speed pipe is in the ping state. Do not | |
241 | * use. | |
242 | */ | |
243 | enum cvmx_usb_pipe_flags { | |
6570b4a9 AK |
244 | __CVMX_USB_PIPE_FLAGS_SCHEDULED = 1 << 17, |
245 | __CVMX_USB_PIPE_FLAGS_NEED_PING = 1 << 18, | |
246 | }; | |
247 | ||
248 | /* Normal prefetch that use the pref instruction. */ | |
249 | #define CVMX_PREFETCH(address, offset) asm volatile ("pref %[type], %[off](%[rbase])" : : [rbase] "d" (address), [off] "I" (offset), [type] "n" (0)) | |
250 | ||
251 | /* Maximum number of times to retry failed transactions */ | |
252 | #define MAX_RETRIES 3 | |
253 | ||
6570b4a9 AK |
254 | /* Maximum number of hardware channels supported by the USB block */ |
255 | #define MAX_CHANNELS 8 | |
256 | ||
257 | /* The highest valid USB device address */ | |
258 | #define MAX_USB_ADDRESS 127 | |
259 | ||
260 | /* The highest valid USB endpoint number */ | |
261 | #define MAX_USB_ENDPOINT 15 | |
262 | ||
263 | /* The highest valid port number on a hub */ | |
264 | #define MAX_USB_HUB_PORT 15 | |
265 | ||
266 | /* | |
267 | * The low level hardware can transfer a maximum of this number of bytes in each | |
268 | * transfer. The field is 19 bits wide | |
269 | */ | |
270 | #define MAX_TRANSFER_BYTES ((1<<19)-1) | |
271 | ||
272 | /* | |
273 | * The low level hardware can transfer a maximum of this number of packets in | |
274 | * each transfer. The field is 10 bits wide | |
275 | */ | |
276 | #define MAX_TRANSFER_PACKETS ((1<<10)-1) | |
277 | ||
6570b4a9 AK |
278 | enum { |
279 | USB_CLOCK_TYPE_REF_12, | |
280 | USB_CLOCK_TYPE_REF_24, | |
281 | USB_CLOCK_TYPE_REF_48, | |
282 | USB_CLOCK_TYPE_CRYSTAL_12, | |
283 | }; | |
284 | ||
285 | /** | |
286 | * Logical transactions may take numerous low level | |
287 | * transactions, especially when splits are concerned. This | |
288 | * enum represents all of the possible stages a transaction can | |
289 | * be in. Note that split completes are always even. This is so | |
290 | * the NAK handler can backup to the previous low level | |
291 | * transaction with a simple clearing of bit 0. | |
292 | */ | |
293 | enum cvmx_usb_stage { | |
294 | CVMX_USB_STAGE_NON_CONTROL, | |
295 | CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE, | |
296 | CVMX_USB_STAGE_SETUP, | |
297 | CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE, | |
298 | CVMX_USB_STAGE_DATA, | |
299 | CVMX_USB_STAGE_DATA_SPLIT_COMPLETE, | |
300 | CVMX_USB_STAGE_STATUS, | |
301 | CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE, | |
302 | }; | |
303 | ||
304 | /** | |
305 | * struct cvmx_usb_transaction - describes each pending USB transaction | |
306 | * regardless of type. These are linked together | |
307 | * to form a list of pending requests for a pipe. | |
308 | * | |
309 | * @prev: Transaction before this one in the pipe. | |
310 | * @next: Transaction after this one in the pipe. | |
311 | * @type: Type of transaction, duplicated of the pipe. | |
312 | * @flags: State flags for this transaction. | |
313 | * @buffer: User's physical buffer address to read/write. | |
314 | * @buffer_length: Size of the user's buffer in bytes. | |
315 | * @control_header: For control transactions, physical address of the 8 | |
316 | * byte standard header. | |
317 | * @iso_start_frame: For ISO transactions, the starting frame number. | |
318 | * @iso_number_packets: For ISO transactions, the number of packets in the | |
319 | * request. | |
320 | * @iso_packets: For ISO transactions, the sub packets in the request. | |
321 | * @actual_bytes: Actual bytes transfer for this transaction. | |
322 | * @stage: For control transactions, the current stage. | |
0cce1004 | 323 | * @urb: URB. |
6570b4a9 AK |
324 | */ |
325 | struct cvmx_usb_transaction { | |
326 | struct cvmx_usb_transaction *prev; | |
327 | struct cvmx_usb_transaction *next; | |
328 | enum cvmx_usb_transfer type; | |
6570b4a9 AK |
329 | uint64_t buffer; |
330 | int buffer_length; | |
331 | uint64_t control_header; | |
332 | int iso_start_frame; | |
333 | int iso_number_packets; | |
334 | struct cvmx_usb_iso_packet *iso_packets; | |
335 | int xfersize; | |
336 | int pktcnt; | |
337 | int retries; | |
338 | int actual_bytes; | |
339 | enum cvmx_usb_stage stage; | |
0cce1004 | 340 | struct urb *urb; |
6570b4a9 AK |
341 | }; |
342 | ||
343 | /** | |
344 | * struct cvmx_usb_pipe - a pipe represents a virtual connection between Octeon | |
345 | * and some USB device. It contains a list of pending | |
346 | * request to the device. | |
347 | * | |
348 | * @prev: Pipe before this one in the list | |
349 | * @next: Pipe after this one in the list | |
350 | * @head: The first pending transaction | |
351 | * @tail: The last pending transaction | |
352 | * @interval: For periodic pipes, the interval between packets in | |
353 | * frames | |
354 | * @next_tx_frame: The next frame this pipe is allowed to transmit on | |
355 | * @flags: State flags for this pipe | |
356 | * @device_speed: Speed of device connected to this pipe | |
357 | * @transfer_type: Type of transaction supported by this pipe | |
358 | * @transfer_dir: IN or OUT. Ignored for Control | |
359 | * @multi_count: Max packet in a row for the device | |
360 | * @max_packet: The device's maximum packet size in bytes | |
361 | * @device_addr: USB device address at other end of pipe | |
362 | * @endpoint_num: USB endpoint number at other end of pipe | |
363 | * @hub_device_addr: Hub address this device is connected to | |
364 | * @hub_port: Hub port this device is connected to | |
365 | * @pid_toggle: This toggles between 0/1 on every packet send to track | |
366 | * the data pid needed | |
367 | * @channel: Hardware DMA channel for this pipe | |
368 | * @split_sc_frame: The low order bits of the frame number the split | |
369 | * complete should be sent on | |
370 | */ | |
371 | struct cvmx_usb_pipe { | |
372 | struct cvmx_usb_pipe *prev; | |
373 | struct cvmx_usb_pipe *next; | |
374 | struct cvmx_usb_transaction *head; | |
375 | struct cvmx_usb_transaction *tail; | |
376 | uint64_t interval; | |
377 | uint64_t next_tx_frame; | |
378 | enum cvmx_usb_pipe_flags flags; | |
379 | enum cvmx_usb_speed device_speed; | |
380 | enum cvmx_usb_transfer transfer_type; | |
381 | enum cvmx_usb_direction transfer_dir; | |
382 | int multi_count; | |
383 | uint16_t max_packet; | |
384 | uint8_t device_addr; | |
385 | uint8_t endpoint_num; | |
386 | uint8_t hub_device_addr; | |
387 | uint8_t hub_port; | |
388 | uint8_t pid_toggle; | |
389 | uint8_t channel; | |
390 | int8_t split_sc_frame; | |
391 | }; | |
392 | ||
393 | /** | |
394 | * struct cvmx_usb_pipe_list | |
395 | * | |
396 | * @head: Head of the list, or NULL if empty. | |
397 | * @tail: Tail if the list, or NULL if empty. | |
398 | */ | |
399 | struct cvmx_usb_pipe_list { | |
400 | struct cvmx_usb_pipe *head; | |
401 | struct cvmx_usb_pipe *tail; | |
402 | }; | |
403 | ||
404 | struct cvmx_usb_tx_fifo { | |
405 | struct { | |
406 | int channel; | |
407 | int size; | |
408 | uint64_t address; | |
409 | } entry[MAX_CHANNELS+1]; | |
410 | int head; | |
411 | int tail; | |
412 | }; | |
413 | ||
414 | /** | |
cb61c600 | 415 | * struct cvmx_usb_state - the state of the USB block |
6570b4a9 AK |
416 | * |
417 | * init_flags: Flags passed to initialize. | |
418 | * index: Which USB block this is for. | |
419 | * idle_hardware_channels: Bit set for every idle hardware channel. | |
420 | * usbcx_hprt: Stored port status so we don't need to read a CSR to | |
421 | * determine splits. | |
422 | * pipe_for_channel: Map channels to pipes. | |
6570b4a9 | 423 | * pipe: Storage for pipes. |
6570b4a9 AK |
424 | * indent: Used by debug output to indent functions. |
425 | * port_status: Last port status used for change notification. | |
6570b4a9 AK |
426 | * idle_pipes: List of open pipes that have no transactions. |
427 | * active_pipes: Active pipes indexed by transfer type. | |
428 | * frame_number: Increments every SOF interrupt for time keeping. | |
429 | * active_split: Points to the current active split, or NULL. | |
430 | */ | |
cb61c600 | 431 | struct cvmx_usb_state { |
6570b4a9 AK |
432 | int init_flags; |
433 | int index; | |
434 | int idle_hardware_channels; | |
435 | union cvmx_usbcx_hprt usbcx_hprt; | |
436 | struct cvmx_usb_pipe *pipe_for_channel[MAX_CHANNELS]; | |
6570b4a9 AK |
437 | int indent; |
438 | struct cvmx_usb_port_status port_status; | |
6570b4a9 AK |
439 | struct cvmx_usb_pipe_list idle_pipes; |
440 | struct cvmx_usb_pipe_list active_pipes[4]; | |
441 | uint64_t frame_number; | |
442 | struct cvmx_usb_transaction *active_split; | |
443 | struct cvmx_usb_tx_fifo periodic; | |
444 | struct cvmx_usb_tx_fifo nonperiodic; | |
445 | }; | |
446 | ||
b164935b | 447 | struct octeon_hcd { |
771378bb | 448 | spinlock_t lock; |
a24ed35a | 449 | struct cvmx_usb_state usb; |
771378bb AK |
450 | struct tasklet_struct dequeue_tasklet; |
451 | struct list_head dequeue_list; | |
b164935b AK |
452 | }; |
453 | ||
6570b4a9 AK |
454 | /* This macro spins on a field waiting for it to reach a value */ |
455 | #define CVMX_WAIT_FOR_FIELD32(address, type, field, op, value, timeout_usec)\ | |
456 | ({int result; \ | |
457 | do { \ | |
458 | uint64_t done = cvmx_get_cycle() + (uint64_t)timeout_usec * \ | |
459 | octeon_get_clock_rate() / 1000000; \ | |
460 | type c; \ | |
461 | while (1) { \ | |
462 | c.u32 = __cvmx_usb_read_csr32(usb, address); \ | |
463 | if (c.s.field op (value)) { \ | |
464 | result = 0; \ | |
465 | break; \ | |
466 | } else if (cvmx_get_cycle() > done) { \ | |
467 | result = -1; \ | |
468 | break; \ | |
469 | } else \ | |
470 | cvmx_wait(100); \ | |
471 | } \ | |
472 | } while (0); \ | |
473 | result; }) | |
474 | ||
475 | /* | |
476 | * This macro logically sets a single field in a CSR. It does the sequence | |
477 | * read, modify, and write | |
478 | */ | |
479 | #define USB_SET_FIELD32(address, type, field, value) \ | |
480 | do { \ | |
481 | type c; \ | |
482 | c.u32 = __cvmx_usb_read_csr32(usb, address); \ | |
483 | c.s.field = value; \ | |
484 | __cvmx_usb_write_csr32(usb, address, c.u32); \ | |
485 | } while (0) | |
486 | ||
487 | /* Returns the IO address to push/pop stuff data from the FIFOs */ | |
488 | #define USB_FIFO_ADDRESS(channel, usb_index) (CVMX_USBCX_GOTGCTL(usb_index) + ((channel)+1)*0x1000) | |
489 | ||
490 | static int octeon_usb_get_clock_type(void) | |
491 | { | |
492 | switch (cvmx_sysinfo_get()->board_type) { | |
493 | case CVMX_BOARD_TYPE_BBGW_REF: | |
494 | case CVMX_BOARD_TYPE_LANAI2_A: | |
495 | case CVMX_BOARD_TYPE_LANAI2_U: | |
496 | case CVMX_BOARD_TYPE_LANAI2_G: | |
497 | case CVMX_BOARD_TYPE_UBNT_E100: | |
498 | return USB_CLOCK_TYPE_CRYSTAL_12; | |
499 | } | |
500 | return USB_CLOCK_TYPE_REF_48; | |
501 | } | |
502 | ||
503 | /** | |
504 | * Read a USB 32bit CSR. It performs the necessary address swizzle | |
505 | * for 32bit CSRs and logs the value in a readable format if | |
506 | * debugging is on. | |
507 | * | |
508 | * @usb: USB block this access is for | |
509 | * @address: 64bit address to read | |
510 | * | |
511 | * Returns: Result of the read | |
512 | */ | |
cb61c600 | 513 | static inline uint32_t __cvmx_usb_read_csr32(struct cvmx_usb_state *usb, |
6570b4a9 AK |
514 | uint64_t address) |
515 | { | |
516 | uint32_t result = cvmx_read64_uint32(address ^ 4); | |
517 | return result; | |
518 | } | |
519 | ||
520 | ||
521 | /** | |
522 | * Write a USB 32bit CSR. It performs the necessary address | |
523 | * swizzle for 32bit CSRs and logs the value in a readable format | |
524 | * if debugging is on. | |
525 | * | |
526 | * @usb: USB block this access is for | |
527 | * @address: 64bit address to write | |
528 | * @value: Value to write | |
529 | */ | |
cb61c600 | 530 | static inline void __cvmx_usb_write_csr32(struct cvmx_usb_state *usb, |
6570b4a9 AK |
531 | uint64_t address, uint32_t value) |
532 | { | |
533 | cvmx_write64_uint32(address ^ 4, value); | |
534 | cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); | |
535 | } | |
536 | ||
537 | ||
538 | /** | |
539 | * Read a USB 64bit CSR. It logs the value in a readable format if | |
540 | * debugging is on. | |
541 | * | |
542 | * @usb: USB block this access is for | |
543 | * @address: 64bit address to read | |
544 | * | |
545 | * Returns: Result of the read | |
546 | */ | |
cb61c600 | 547 | static inline uint64_t __cvmx_usb_read_csr64(struct cvmx_usb_state *usb, |
6570b4a9 AK |
548 | uint64_t address) |
549 | { | |
550 | uint64_t result = cvmx_read64_uint64(address); | |
551 | return result; | |
552 | } | |
553 | ||
554 | ||
555 | /** | |
556 | * Write a USB 64bit CSR. It logs the value in a readable format | |
557 | * if debugging is on. | |
558 | * | |
559 | * @usb: USB block this access is for | |
560 | * @address: 64bit address to write | |
561 | * @value: Value to write | |
562 | */ | |
cb61c600 | 563 | static inline void __cvmx_usb_write_csr64(struct cvmx_usb_state *usb, |
6570b4a9 AK |
564 | uint64_t address, uint64_t value) |
565 | { | |
566 | cvmx_write64_uint64(address, value); | |
567 | } | |
568 | ||
569 | /** | |
570 | * Return non zero if this pipe connects to a non HIGH speed | |
571 | * device through a high speed hub. | |
572 | * | |
573 | * @usb: USB block this access is for | |
574 | * @pipe: Pipe to check | |
575 | * | |
576 | * Returns: Non zero if we need to do split transactions | |
577 | */ | |
cb61c600 AK |
578 | static inline int __cvmx_usb_pipe_needs_split(struct cvmx_usb_state *usb, |
579 | struct cvmx_usb_pipe *pipe) | |
6570b4a9 | 580 | { |
aa87afe2 AK |
581 | return pipe->device_speed != CVMX_USB_SPEED_HIGH && |
582 | usb->usbcx_hprt.s.prtspd == CVMX_USB_SPEED_HIGH; | |
6570b4a9 AK |
583 | } |
584 | ||
585 | ||
586 | /** | |
587 | * Trivial utility function to return the correct PID for a pipe | |
588 | * | |
589 | * @pipe: pipe to check | |
590 | * | |
591 | * Returns: PID for pipe | |
592 | */ | |
593 | static inline int __cvmx_usb_get_data_pid(struct cvmx_usb_pipe *pipe) | |
594 | { | |
595 | if (pipe->pid_toggle) | |
596 | return 2; /* Data1 */ | |
597 | else | |
598 | return 0; /* Data0 */ | |
599 | } | |
600 | ||
601 | ||
602 | /** | |
603 | * Return the number of USB ports supported by this Octeon | |
604 | * chip. If the chip doesn't support USB, or is not supported | |
605 | * by this API, a zero will be returned. Most Octeon chips | |
606 | * support one usb port, but some support two ports. | |
607 | * cvmx_usb_initialize() must be called on independent | |
608 | * struct cvmx_usb_state. | |
609 | * | |
610 | * Returns: Number of port, zero if usb isn't supported | |
611 | */ | |
612 | static int cvmx_usb_get_num_ports(void) | |
613 | { | |
614 | int arch_ports = 0; | |
615 | ||
616 | if (OCTEON_IS_MODEL(OCTEON_CN56XX)) | |
617 | arch_ports = 1; | |
618 | else if (OCTEON_IS_MODEL(OCTEON_CN52XX)) | |
619 | arch_ports = 2; | |
620 | else if (OCTEON_IS_MODEL(OCTEON_CN50XX)) | |
621 | arch_ports = 1; | |
622 | else if (OCTEON_IS_MODEL(OCTEON_CN31XX)) | |
623 | arch_ports = 1; | |
624 | else if (OCTEON_IS_MODEL(OCTEON_CN30XX)) | |
625 | arch_ports = 1; | |
626 | else | |
627 | arch_ports = 0; | |
628 | ||
629 | return arch_ports; | |
630 | } | |
631 | ||
6570b4a9 AK |
632 | /** |
633 | * Add a pipe to the tail of a list | |
634 | * @list: List to add pipe to | |
635 | * @pipe: Pipe to add | |
636 | */ | |
637 | static inline void __cvmx_usb_append_pipe(struct cvmx_usb_pipe_list *list, struct cvmx_usb_pipe *pipe) | |
638 | { | |
639 | pipe->next = NULL; | |
640 | pipe->prev = list->tail; | |
641 | if (list->tail) | |
642 | list->tail->next = pipe; | |
643 | else | |
644 | list->head = pipe; | |
645 | list->tail = pipe; | |
646 | } | |
647 | ||
648 | ||
649 | /** | |
650 | * Remove a pipe from a list | |
651 | * @list: List to remove pipe from | |
652 | * @pipe: Pipe to remove | |
653 | */ | |
654 | static inline void __cvmx_usb_remove_pipe(struct cvmx_usb_pipe_list *list, struct cvmx_usb_pipe *pipe) | |
655 | { | |
656 | if (list->head == pipe) { | |
657 | list->head = pipe->next; | |
658 | pipe->next = NULL; | |
659 | if (list->head) | |
660 | list->head->prev = NULL; | |
661 | else | |
662 | list->tail = NULL; | |
663 | } else if (list->tail == pipe) { | |
664 | list->tail = pipe->prev; | |
665 | list->tail->next = NULL; | |
666 | pipe->prev = NULL; | |
667 | } else { | |
668 | pipe->prev->next = pipe->next; | |
669 | pipe->next->prev = pipe->prev; | |
670 | pipe->prev = NULL; | |
671 | pipe->next = NULL; | |
672 | } | |
673 | } | |
674 | ||
675 | ||
676 | /** | |
677 | * Initialize a USB port for use. This must be called before any | |
678 | * other access to the Octeon USB port is made. The port starts | |
679 | * off in the disabled state. | |
680 | * | |
cb61c600 | 681 | * @usb: Pointer to an empty struct cvmx_usb_state |
6570b4a9 AK |
682 | * that will be populated by the initialize call. |
683 | * This structure is then passed to all other USB | |
684 | * functions. | |
685 | * @usb_port_number: | |
686 | * Which Octeon USB port to initialize. | |
687 | * | |
688 | * Returns: 0 or a negative error code. | |
689 | */ | |
cb61c600 | 690 | static int cvmx_usb_initialize(struct cvmx_usb_state *usb, |
6570b4a9 AK |
691 | int usb_port_number) |
692 | { | |
693 | union cvmx_usbnx_clk_ctl usbn_clk_ctl; | |
694 | union cvmx_usbnx_usbp_ctl_status usbn_usbp_ctl_status; | |
6570b4a9 AK |
695 | enum cvmx_usb_initialize_flags flags = 0; |
696 | ||
6570b4a9 AK |
697 | /* At first allow 0-1 for the usb port number */ |
698 | if ((usb_port_number < 0) || (usb_port_number > 1)) | |
699 | return -EINVAL; | |
700 | /* For all chips except 52XX there is only one port */ | |
701 | if (!OCTEON_IS_MODEL(OCTEON_CN52XX) && (usb_port_number > 0)) | |
702 | return -EINVAL; | |
703 | /* Try to determine clock type automatically */ | |
704 | if (octeon_usb_get_clock_type() == USB_CLOCK_TYPE_CRYSTAL_12) { | |
705 | /* Only 12 MHZ crystals are supported */ | |
706 | flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI; | |
707 | } else { | |
708 | flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND; | |
709 | ||
710 | switch (octeon_usb_get_clock_type()) { | |
711 | case USB_CLOCK_TYPE_REF_12: | |
712 | flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ; | |
713 | break; | |
714 | case USB_CLOCK_TYPE_REF_24: | |
715 | flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ; | |
716 | break; | |
717 | case USB_CLOCK_TYPE_REF_48: | |
718 | flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ; | |
719 | break; | |
720 | default: | |
721 | return -EINVAL; | |
722 | break; | |
723 | } | |
724 | } | |
725 | ||
726 | memset(usb, 0, sizeof(*usb)); | |
727 | usb->init_flags = flags; | |
728 | ||
729 | /* Initialize the USB state structure */ | |
d2695a8a | 730 | usb->index = usb_port_number; |
6570b4a9 AK |
731 | |
732 | /* | |
733 | * Power On Reset and PHY Initialization | |
734 | * | |
735 | * 1. Wait for DCOK to assert (nothing to do) | |
736 | * | |
737 | * 2a. Write USBN0/1_CLK_CTL[POR] = 1 and | |
738 | * USBN0/1_CLK_CTL[HRST,PRST,HCLK_RST] = 0 | |
739 | */ | |
740 | usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index)); | |
741 | usbn_clk_ctl.s.por = 1; | |
742 | usbn_clk_ctl.s.hrst = 0; | |
743 | usbn_clk_ctl.s.prst = 0; | |
744 | usbn_clk_ctl.s.hclk_rst = 0; | |
745 | usbn_clk_ctl.s.enable = 0; | |
746 | /* | |
747 | * 2b. Select the USB reference clock/crystal parameters by writing | |
748 | * appropriate values to USBN0/1_CLK_CTL[P_C_SEL, P_RTYPE, P_COM_ON] | |
749 | */ | |
750 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND) { | |
751 | /* | |
752 | * The USB port uses 12/24/48MHz 2.5V board clock | |
753 | * source at USB_XO. USB_XI should be tied to GND. | |
754 | * Most Octeon evaluation boards require this setting | |
755 | */ | |
7d7bc26b AK |
756 | if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || |
757 | OCTEON_IS_MODEL(OCTEON_CN56XX) || | |
758 | OCTEON_IS_MODEL(OCTEON_CN50XX)) | |
759 | /* From CN56XX,CN50XX,CN31XX,CN30XX manuals */ | |
760 | usbn_clk_ctl.s.p_rtype = 2; /* p_rclk=1 & p_xenbn=0 */ | |
6570b4a9 AK |
761 | else |
762 | /* From CN52XX manual */ | |
34b70b9e | 763 | usbn_clk_ctl.s.p_rtype = 1; |
6570b4a9 AK |
764 | |
765 | switch (flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK) { | |
766 | case CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ: | |
767 | usbn_clk_ctl.s.p_c_sel = 0; | |
768 | break; | |
769 | case CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ: | |
770 | usbn_clk_ctl.s.p_c_sel = 1; | |
771 | break; | |
772 | case CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ: | |
773 | usbn_clk_ctl.s.p_c_sel = 2; | |
774 | break; | |
775 | } | |
776 | } else { | |
777 | /* | |
778 | * The USB port uses a 12MHz crystal as clock source | |
779 | * at USB_XO and USB_XI | |
780 | */ | |
7d7bc26b | 781 | if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) |
6570b4a9 | 782 | /* From CN31XX,CN30XX manual */ |
7d7bc26b | 783 | usbn_clk_ctl.s.p_rtype = 3; /* p_rclk=1 & p_xenbn=1 */ |
6570b4a9 | 784 | else |
7d7bc26b | 785 | /* From CN56XX,CN52XX,CN50XX manuals. */ |
34b70b9e | 786 | usbn_clk_ctl.s.p_rtype = 0; |
6570b4a9 AK |
787 | |
788 | usbn_clk_ctl.s.p_c_sel = 0; | |
789 | } | |
790 | /* | |
791 | * 2c. Select the HCLK via writing USBN0/1_CLK_CTL[DIVIDE, DIVIDE2] and | |
792 | * setting USBN0/1_CLK_CTL[ENABLE] = 1. Divide the core clock down | |
793 | * such that USB is as close as possible to 125Mhz | |
794 | */ | |
795 | { | |
796 | int divisor = (octeon_get_clock_rate()+125000000-1)/125000000; | |
797 | /* Lower than 4 doesn't seem to work properly */ | |
798 | if (divisor < 4) | |
799 | divisor = 4; | |
800 | usbn_clk_ctl.s.divide = divisor; | |
801 | usbn_clk_ctl.s.divide2 = 0; | |
802 | } | |
803 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
804 | usbn_clk_ctl.u64); | |
805 | /* 2d. Write USBN0/1_CLK_CTL[HCLK_RST] = 1 */ | |
806 | usbn_clk_ctl.s.hclk_rst = 1; | |
807 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
808 | usbn_clk_ctl.u64); | |
809 | /* 2e. Wait 64 core-clock cycles for HCLK to stabilize */ | |
810 | cvmx_wait(64); | |
811 | /* | |
812 | * 3. Program the power-on reset field in the USBN clock-control | |
813 | * register: | |
814 | * USBN_CLK_CTL[POR] = 0 | |
815 | */ | |
816 | usbn_clk_ctl.s.por = 0; | |
817 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
818 | usbn_clk_ctl.u64); | |
819 | /* 4. Wait 1 ms for PHY clock to start */ | |
820 | mdelay(1); | |
821 | /* | |
822 | * 5. Program the Reset input from automatic test equipment field in the | |
823 | * USBP control and status register: | |
824 | * USBN_USBP_CTL_STATUS[ATE_RESET] = 1 | |
825 | */ | |
826 | usbn_usbp_ctl_status.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index)); | |
827 | usbn_usbp_ctl_status.s.ate_reset = 1; | |
828 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index), | |
829 | usbn_usbp_ctl_status.u64); | |
830 | /* 6. Wait 10 cycles */ | |
831 | cvmx_wait(10); | |
832 | /* | |
833 | * 7. Clear ATE_RESET field in the USBN clock-control register: | |
834 | * USBN_USBP_CTL_STATUS[ATE_RESET] = 0 | |
835 | */ | |
836 | usbn_usbp_ctl_status.s.ate_reset = 0; | |
837 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index), | |
838 | usbn_usbp_ctl_status.u64); | |
839 | /* | |
840 | * 8. Program the PHY reset field in the USBN clock-control register: | |
841 | * USBN_CLK_CTL[PRST] = 1 | |
842 | */ | |
843 | usbn_clk_ctl.s.prst = 1; | |
844 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
845 | usbn_clk_ctl.u64); | |
846 | /* | |
847 | * 9. Program the USBP control and status register to select host or | |
848 | * device mode. USBN_USBP_CTL_STATUS[HST_MODE] = 0 for host, = 1 for | |
849 | * device | |
850 | */ | |
851 | usbn_usbp_ctl_status.s.hst_mode = 0; | |
852 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index), | |
853 | usbn_usbp_ctl_status.u64); | |
854 | /* 10. Wait 1 us */ | |
855 | udelay(1); | |
856 | /* | |
857 | * 11. Program the hreset_n field in the USBN clock-control register: | |
858 | * USBN_CLK_CTL[HRST] = 1 | |
859 | */ | |
860 | usbn_clk_ctl.s.hrst = 1; | |
861 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
862 | usbn_clk_ctl.u64); | |
863 | /* 12. Proceed to USB core initialization */ | |
864 | usbn_clk_ctl.s.enable = 1; | |
865 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
866 | usbn_clk_ctl.u64); | |
867 | udelay(1); | |
868 | ||
869 | /* | |
870 | * USB Core Initialization | |
871 | * | |
872 | * 1. Read USBC_GHWCFG1, USBC_GHWCFG2, USBC_GHWCFG3, USBC_GHWCFG4 to | |
873 | * determine USB core configuration parameters. | |
874 | * | |
875 | * Nothing needed | |
876 | * | |
877 | * 2. Program the following fields in the global AHB configuration | |
878 | * register (USBC_GAHBCFG) | |
879 | * DMA mode, USBC_GAHBCFG[DMAEn]: 1 = DMA mode, 0 = slave mode | |
880 | * Burst length, USBC_GAHBCFG[HBSTLEN] = 0 | |
881 | * Nonperiodic TxFIFO empty level (slave mode only), | |
882 | * USBC_GAHBCFG[NPTXFEMPLVL] | |
883 | * Periodic TxFIFO empty level (slave mode only), | |
884 | * USBC_GAHBCFG[PTXFEMPLVL] | |
885 | * Global interrupt mask, USBC_GAHBCFG[GLBLINTRMSK] = 1 | |
886 | */ | |
887 | { | |
888 | union cvmx_usbcx_gahbcfg usbcx_gahbcfg; | |
889 | /* Due to an errata, CN31XX doesn't support DMA */ | |
890 | if (OCTEON_IS_MODEL(OCTEON_CN31XX)) | |
891 | usb->init_flags |= CVMX_USB_INITIALIZE_FLAGS_NO_DMA; | |
892 | usbcx_gahbcfg.u32 = 0; | |
893 | usbcx_gahbcfg.s.dmaen = !(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA); | |
894 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) | |
895 | /* Only use one channel with non DMA */ | |
896 | usb->idle_hardware_channels = 0x1; | |
897 | else if (OCTEON_IS_MODEL(OCTEON_CN5XXX)) | |
898 | /* CN5XXX have an errata with channel 3 */ | |
899 | usb->idle_hardware_channels = 0xf7; | |
900 | else | |
901 | usb->idle_hardware_channels = 0xff; | |
902 | usbcx_gahbcfg.s.hbstlen = 0; | |
903 | usbcx_gahbcfg.s.nptxfemplvl = 1; | |
904 | usbcx_gahbcfg.s.ptxfemplvl = 1; | |
905 | usbcx_gahbcfg.s.glblintrmsk = 1; | |
906 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GAHBCFG(usb->index), | |
907 | usbcx_gahbcfg.u32); | |
908 | } | |
909 | /* | |
910 | * 3. Program the following fields in USBC_GUSBCFG register. | |
911 | * HS/FS timeout calibration, USBC_GUSBCFG[TOUTCAL] = 0 | |
912 | * ULPI DDR select, USBC_GUSBCFG[DDRSEL] = 0 | |
913 | * USB turnaround time, USBC_GUSBCFG[USBTRDTIM] = 0x5 | |
914 | * PHY low-power clock select, USBC_GUSBCFG[PHYLPWRCLKSEL] = 0 | |
915 | */ | |
916 | { | |
917 | union cvmx_usbcx_gusbcfg usbcx_gusbcfg; | |
918 | usbcx_gusbcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index)); | |
919 | usbcx_gusbcfg.s.toutcal = 0; | |
920 | usbcx_gusbcfg.s.ddrsel = 0; | |
921 | usbcx_gusbcfg.s.usbtrdtim = 0x5; | |
922 | usbcx_gusbcfg.s.phylpwrclksel = 0; | |
923 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index), | |
924 | usbcx_gusbcfg.u32); | |
925 | } | |
926 | /* | |
927 | * 4. The software must unmask the following bits in the USBC_GINTMSK | |
928 | * register. | |
929 | * OTG interrupt mask, USBC_GINTMSK[OTGINTMSK] = 1 | |
930 | * Mode mismatch interrupt mask, USBC_GINTMSK[MODEMISMSK] = 1 | |
931 | */ | |
932 | { | |
933 | union cvmx_usbcx_gintmsk usbcx_gintmsk; | |
934 | int channel; | |
935 | ||
936 | usbcx_gintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTMSK(usb->index)); | |
937 | usbcx_gintmsk.s.otgintmsk = 1; | |
938 | usbcx_gintmsk.s.modemismsk = 1; | |
939 | usbcx_gintmsk.s.hchintmsk = 1; | |
940 | usbcx_gintmsk.s.sofmsk = 0; | |
941 | /* We need RX FIFO interrupts if we don't have DMA */ | |
942 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) | |
943 | usbcx_gintmsk.s.rxflvlmsk = 1; | |
944 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTMSK(usb->index), | |
945 | usbcx_gintmsk.u32); | |
946 | ||
947 | /* | |
948 | * Disable all channel interrupts. We'll enable them per channel | |
949 | * later. | |
950 | */ | |
951 | for (channel = 0; channel < 8; channel++) | |
952 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0); | |
953 | } | |
954 | ||
955 | { | |
956 | /* | |
957 | * Host Port Initialization | |
958 | * | |
959 | * 1. Program the host-port interrupt-mask field to unmask, | |
960 | * USBC_GINTMSK[PRTINT] = 1 | |
961 | */ | |
962 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, | |
963 | prtintmsk, 1); | |
964 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, | |
965 | disconnintmsk, 1); | |
966 | /* | |
967 | * 2. Program the USBC_HCFG register to select full-speed host | |
968 | * or high-speed host. | |
969 | */ | |
970 | { | |
971 | union cvmx_usbcx_hcfg usbcx_hcfg; | |
972 | usbcx_hcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCFG(usb->index)); | |
973 | usbcx_hcfg.s.fslssupp = 0; | |
974 | usbcx_hcfg.s.fslspclksel = 0; | |
975 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCFG(usb->index), usbcx_hcfg.u32); | |
976 | } | |
977 | /* | |
978 | * 3. Program the port power bit to drive VBUS on the USB, | |
979 | * USBC_HPRT[PRTPWR] = 1 | |
980 | */ | |
981 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtpwr, 1); | |
982 | ||
983 | /* | |
984 | * Steps 4-15 from the manual are done later in the port enable | |
985 | */ | |
986 | } | |
987 | ||
988 | return 0; | |
989 | } | |
990 | ||
991 | ||
992 | /** | |
993 | * Shutdown a USB port after a call to cvmx_usb_initialize(). | |
994 | * The port should be disabled with all pipes closed when this | |
995 | * function is called. | |
996 | * | |
cb61c600 | 997 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
998 | * |
999 | * Returns: 0 or a negative error code. | |
1000 | */ | |
cb61c600 | 1001 | static int cvmx_usb_shutdown(struct cvmx_usb_state *usb) |
6570b4a9 AK |
1002 | { |
1003 | union cvmx_usbnx_clk_ctl usbn_clk_ctl; | |
6570b4a9 AK |
1004 | |
1005 | /* Make sure all pipes are closed */ | |
1006 | if (usb->idle_pipes.head || | |
1007 | usb->active_pipes[CVMX_USB_TRANSFER_ISOCHRONOUS].head || | |
1008 | usb->active_pipes[CVMX_USB_TRANSFER_INTERRUPT].head || | |
1009 | usb->active_pipes[CVMX_USB_TRANSFER_CONTROL].head || | |
1010 | usb->active_pipes[CVMX_USB_TRANSFER_BULK].head) | |
1011 | return -EBUSY; | |
1012 | ||
1013 | /* Disable the clocks and put them in power on reset */ | |
1014 | usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index)); | |
1015 | usbn_clk_ctl.s.enable = 1; | |
1016 | usbn_clk_ctl.s.por = 1; | |
1017 | usbn_clk_ctl.s.hclk_rst = 1; | |
1018 | usbn_clk_ctl.s.prst = 0; | |
1019 | usbn_clk_ctl.s.hrst = 0; | |
1020 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), | |
1021 | usbn_clk_ctl.u64); | |
1022 | return 0; | |
1023 | } | |
1024 | ||
1025 | ||
1026 | /** | |
1027 | * Enable a USB port. After this call succeeds, the USB port is | |
1028 | * online and servicing requests. | |
1029 | * | |
cb61c600 | 1030 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1031 | * |
1032 | * Returns: 0 or a negative error code. | |
1033 | */ | |
cb61c600 | 1034 | static int cvmx_usb_enable(struct cvmx_usb_state *usb) |
6570b4a9 AK |
1035 | { |
1036 | union cvmx_usbcx_ghwcfg3 usbcx_ghwcfg3; | |
6570b4a9 AK |
1037 | |
1038 | usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); | |
1039 | ||
1040 | /* | |
1041 | * If the port is already enabled the just return. We don't need to do | |
1042 | * anything | |
1043 | */ | |
1044 | if (usb->usbcx_hprt.s.prtena) | |
1045 | return 0; | |
1046 | ||
1047 | /* If there is nothing plugged into the port then fail immediately */ | |
1048 | if (!usb->usbcx_hprt.s.prtconnsts) { | |
1049 | return -ETIMEDOUT; | |
1050 | } | |
1051 | ||
1052 | /* Program the port reset bit to start the reset process */ | |
1053 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtrst, 1); | |
1054 | ||
1055 | /* | |
1056 | * Wait at least 50ms (high speed), or 10ms (full speed) for the reset | |
1057 | * process to complete. | |
1058 | */ | |
1059 | mdelay(50); | |
1060 | ||
1061 | /* Program the port reset bit to 0, USBC_HPRT[PRTRST] = 0 */ | |
1062 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtrst, 0); | |
1063 | ||
1064 | /* Wait for the USBC_HPRT[PRTENA]. */ | |
1065 | if (CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, | |
1066 | prtena, ==, 1, 100000)) | |
1067 | return -ETIMEDOUT; | |
1068 | ||
1069 | /* | |
1070 | * Read the port speed field to get the enumerated speed, | |
1071 | * USBC_HPRT[PRTSPD]. | |
1072 | */ | |
1073 | usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); | |
1074 | usbcx_ghwcfg3.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GHWCFG3(usb->index)); | |
1075 | ||
1076 | /* | |
1077 | * 13. Program the USBC_GRXFSIZ register to select the size of the | |
1078 | * receive FIFO (25%). | |
1079 | */ | |
1080 | USB_SET_FIELD32(CVMX_USBCX_GRXFSIZ(usb->index), union cvmx_usbcx_grxfsiz, | |
1081 | rxfdep, usbcx_ghwcfg3.s.dfifodepth / 4); | |
1082 | /* | |
1083 | * 14. Program the USBC_GNPTXFSIZ register to select the size and the | |
1084 | * start address of the non- periodic transmit FIFO for nonperiodic | |
1085 | * transactions (50%). | |
1086 | */ | |
1087 | { | |
1088 | union cvmx_usbcx_gnptxfsiz siz; | |
1089 | siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index)); | |
1090 | siz.s.nptxfdep = usbcx_ghwcfg3.s.dfifodepth / 2; | |
1091 | siz.s.nptxfstaddr = usbcx_ghwcfg3.s.dfifodepth / 4; | |
1092 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index), siz.u32); | |
1093 | } | |
1094 | /* | |
1095 | * 15. Program the USBC_HPTXFSIZ register to select the size and start | |
1096 | * address of the periodic transmit FIFO for periodic transactions | |
1097 | * (25%). | |
1098 | */ | |
1099 | { | |
1100 | union cvmx_usbcx_hptxfsiz siz; | |
1101 | siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index)); | |
1102 | siz.s.ptxfsize = usbcx_ghwcfg3.s.dfifodepth / 4; | |
1103 | siz.s.ptxfstaddr = 3 * usbcx_ghwcfg3.s.dfifodepth / 4; | |
1104 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index), siz.u32); | |
1105 | } | |
1106 | /* Flush all FIFOs */ | |
1107 | USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, txfnum, 0x10); | |
1108 | USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, txfflsh, 1); | |
1109 | CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, | |
1110 | txfflsh, ==, 0, 100); | |
1111 | USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, rxfflsh, 1); | |
1112 | CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, | |
1113 | rxfflsh, ==, 0, 100); | |
1114 | ||
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | ||
1119 | /** | |
1120 | * Disable a USB port. After this call the USB port will not | |
1121 | * generate data transfers and will not generate events. | |
1122 | * Transactions in process will fail and call their | |
1123 | * associated callbacks. | |
1124 | * | |
cb61c600 | 1125 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1126 | * |
1127 | * Returns: 0 or a negative error code. | |
1128 | */ | |
cb61c600 | 1129 | static int cvmx_usb_disable(struct cvmx_usb_state *usb) |
6570b4a9 | 1130 | { |
6570b4a9 AK |
1131 | /* Disable the port */ |
1132 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtena, 1); | |
1133 | return 0; | |
1134 | } | |
1135 | ||
1136 | ||
1137 | /** | |
1138 | * Get the current state of the USB port. Use this call to | |
1139 | * determine if the usb port has anything connected, is enabled, | |
1140 | * or has some sort of error condition. The return value of this | |
1141 | * call has "changed" bits to signal of the value of some fields | |
29a202fa | 1142 | * have changed between calls. |
6570b4a9 | 1143 | * |
cb61c600 | 1144 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1145 | * |
1146 | * Returns: Port status information | |
1147 | */ | |
cb61c600 | 1148 | static struct cvmx_usb_port_status cvmx_usb_get_status(struct cvmx_usb_state *usb) |
6570b4a9 AK |
1149 | { |
1150 | union cvmx_usbcx_hprt usbc_hprt; | |
1151 | struct cvmx_usb_port_status result; | |
6570b4a9 AK |
1152 | |
1153 | memset(&result, 0, sizeof(result)); | |
1154 | ||
1155 | usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); | |
1156 | result.port_enabled = usbc_hprt.s.prtena; | |
1157 | result.port_over_current = usbc_hprt.s.prtovrcurract; | |
1158 | result.port_powered = usbc_hprt.s.prtpwr; | |
1159 | result.port_speed = usbc_hprt.s.prtspd; | |
1160 | result.connected = usbc_hprt.s.prtconnsts; | |
1161 | result.connect_change = (result.connected != usb->port_status.connected); | |
1162 | ||
1163 | return result; | |
1164 | } | |
1165 | ||
6570b4a9 AK |
1166 | /** |
1167 | * Open a virtual pipe between the host and a USB device. A pipe | |
1168 | * must be opened before data can be transferred between a device | |
1169 | * and Octeon. | |
1170 | * | |
cb61c600 | 1171 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1172 | * @device_addr: |
1173 | * USB device address to open the pipe to | |
1174 | * (0-127). | |
1175 | * @endpoint_num: | |
1176 | * USB endpoint number to open the pipe to | |
1177 | * (0-15). | |
1178 | * @device_speed: | |
1179 | * The speed of the device the pipe is going | |
1180 | * to. This must match the device's speed, | |
1181 | * which may be different than the port speed. | |
1182 | * @max_packet: The maximum packet length the device can | |
1183 | * transmit/receive (low speed=0-8, full | |
1184 | * speed=0-1023, high speed=0-1024). This value | |
1185 | * comes from the standard endpoint descriptor | |
1186 | * field wMaxPacketSize bits <10:0>. | |
1187 | * @transfer_type: | |
1188 | * The type of transfer this pipe is for. | |
1189 | * @transfer_dir: | |
1190 | * The direction the pipe is in. This is not | |
1191 | * used for control pipes. | |
1192 | * @interval: For ISOCHRONOUS and INTERRUPT transfers, | |
1193 | * this is how often the transfer is scheduled | |
1194 | * for. All other transfers should specify | |
1195 | * zero. The units are in frames (8000/sec at | |
1196 | * high speed, 1000/sec for full speed). | |
1197 | * @multi_count: | |
1198 | * For high speed devices, this is the maximum | |
1199 | * allowed number of packet per microframe. | |
1200 | * Specify zero for non high speed devices. This | |
1201 | * value comes from the standard endpoint descriptor | |
1202 | * field wMaxPacketSize bits <12:11>. | |
1203 | * @hub_device_addr: | |
1204 | * Hub device address this device is connected | |
1205 | * to. Devices connected directly to Octeon | |
1206 | * use zero. This is only used when the device | |
1207 | * is full/low speed behind a high speed hub. | |
1208 | * The address will be of the high speed hub, | |
1209 | * not and full speed hubs after it. | |
1210 | * @hub_port: Which port on the hub the device is | |
1211 | * connected. Use zero for devices connected | |
1212 | * directly to Octeon. Like hub_device_addr, | |
1213 | * this is only used for full/low speed | |
1214 | * devices behind a high speed hub. | |
1215 | * | |
60f81507 | 1216 | * Returns: A non-NULL value is a pipe. NULL means an error. |
6570b4a9 | 1217 | */ |
60f81507 AK |
1218 | static struct cvmx_usb_pipe *cvmx_usb_open_pipe(struct cvmx_usb_state *usb, |
1219 | int device_addr, int | |
1220 | endpoint_num, | |
1221 | enum cvmx_usb_speed | |
1222 | device_speed, | |
1223 | int max_packet, | |
1224 | enum cvmx_usb_transfer | |
1225 | transfer_type, | |
1226 | enum cvmx_usb_direction | |
1227 | transfer_dir, | |
1228 | int interval, int multi_count, | |
1229 | int hub_device_addr, | |
1230 | int hub_port) | |
6570b4a9 AK |
1231 | { |
1232 | struct cvmx_usb_pipe *pipe; | |
6570b4a9 AK |
1233 | |
1234 | if (unlikely((device_addr < 0) || (device_addr > MAX_USB_ADDRESS))) | |
60f81507 | 1235 | return NULL; |
6570b4a9 | 1236 | if (unlikely((endpoint_num < 0) || (endpoint_num > MAX_USB_ENDPOINT))) |
60f81507 | 1237 | return NULL; |
6570b4a9 | 1238 | if (unlikely(device_speed > CVMX_USB_SPEED_LOW)) |
60f81507 | 1239 | return NULL; |
6570b4a9 | 1240 | if (unlikely((max_packet <= 0) || (max_packet > 1024))) |
60f81507 | 1241 | return NULL; |
6570b4a9 | 1242 | if (unlikely(transfer_type > CVMX_USB_TRANSFER_INTERRUPT)) |
60f81507 | 1243 | return NULL; |
6570b4a9 AK |
1244 | if (unlikely((transfer_dir != CVMX_USB_DIRECTION_OUT) && |
1245 | (transfer_dir != CVMX_USB_DIRECTION_IN))) | |
60f81507 | 1246 | return NULL; |
6570b4a9 | 1247 | if (unlikely(interval < 0)) |
60f81507 | 1248 | return NULL; |
6570b4a9 | 1249 | if (unlikely((transfer_type == CVMX_USB_TRANSFER_CONTROL) && interval)) |
60f81507 | 1250 | return NULL; |
6570b4a9 | 1251 | if (unlikely(multi_count < 0)) |
60f81507 | 1252 | return NULL; |
6570b4a9 AK |
1253 | if (unlikely((device_speed != CVMX_USB_SPEED_HIGH) && |
1254 | (multi_count != 0))) | |
60f81507 | 1255 | return NULL; |
6570b4a9 | 1256 | if (unlikely((hub_device_addr < 0) || (hub_device_addr > MAX_USB_ADDRESS))) |
60f81507 | 1257 | return NULL; |
6570b4a9 | 1258 | if (unlikely((hub_port < 0) || (hub_port > MAX_USB_HUB_PORT))) |
60f81507 | 1259 | return NULL; |
6570b4a9 | 1260 | |
d2695a8a | 1261 | pipe = kzalloc(sizeof(*pipe), GFP_ATOMIC); |
6570b4a9 | 1262 | if (!pipe) |
60f81507 | 1263 | return NULL; |
6570b4a9 AK |
1264 | if ((device_speed == CVMX_USB_SPEED_HIGH) && |
1265 | (transfer_dir == CVMX_USB_DIRECTION_OUT) && | |
1266 | (transfer_type == CVMX_USB_TRANSFER_BULK)) | |
1267 | pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING; | |
1268 | pipe->device_addr = device_addr; | |
1269 | pipe->endpoint_num = endpoint_num; | |
1270 | pipe->device_speed = device_speed; | |
1271 | pipe->max_packet = max_packet; | |
1272 | pipe->transfer_type = transfer_type; | |
1273 | pipe->transfer_dir = transfer_dir; | |
1274 | /* | |
1275 | * All pipes use interval to rate limit NAK processing. Force an | |
1276 | * interval if one wasn't supplied | |
1277 | */ | |
1278 | if (!interval) | |
1279 | interval = 1; | |
1280 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
1281 | pipe->interval = interval*8; | |
1282 | /* Force start splits to be schedule on uFrame 0 */ | |
1283 | pipe->next_tx_frame = ((usb->frame_number+7)&~7) + pipe->interval; | |
1284 | } else { | |
1285 | pipe->interval = interval; | |
1286 | pipe->next_tx_frame = usb->frame_number + pipe->interval; | |
1287 | } | |
1288 | pipe->multi_count = multi_count; | |
1289 | pipe->hub_device_addr = hub_device_addr; | |
1290 | pipe->hub_port = hub_port; | |
1291 | pipe->pid_toggle = 0; | |
1292 | pipe->split_sc_frame = -1; | |
1293 | __cvmx_usb_append_pipe(&usb->idle_pipes, pipe); | |
1294 | ||
1295 | /* | |
1296 | * We don't need to tell the hardware about this pipe yet since | |
1297 | * it doesn't have any submitted requests | |
1298 | */ | |
1299 | ||
60f81507 | 1300 | return pipe; |
6570b4a9 AK |
1301 | } |
1302 | ||
1303 | ||
1304 | /** | |
1305 | * Poll the RX FIFOs and remove data as needed. This function is only used | |
1306 | * in non DMA mode. It is very important that this function be called quickly | |
1307 | * enough to prevent FIFO overflow. | |
1308 | * | |
cb61c600 | 1309 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 | 1310 | */ |
cb61c600 | 1311 | static void __cvmx_usb_poll_rx_fifo(struct cvmx_usb_state *usb) |
6570b4a9 AK |
1312 | { |
1313 | union cvmx_usbcx_grxstsph rx_status; | |
1314 | int channel; | |
1315 | int bytes; | |
1316 | uint64_t address; | |
1317 | uint32_t *ptr; | |
1318 | ||
1319 | rx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GRXSTSPH(usb->index)); | |
1320 | /* Only read data if IN data is there */ | |
1321 | if (rx_status.s.pktsts != 2) | |
1322 | return; | |
1323 | /* Check if no data is available */ | |
1324 | if (!rx_status.s.bcnt) | |
1325 | return; | |
1326 | ||
1327 | channel = rx_status.s.chnum; | |
1328 | bytes = rx_status.s.bcnt; | |
1329 | if (!bytes) | |
1330 | return; | |
1331 | ||
1332 | /* Get where the DMA engine would have written this data */ | |
1333 | address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8); | |
1334 | ptr = cvmx_phys_to_ptr(address); | |
1335 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, address + bytes); | |
1336 | ||
1337 | /* Loop writing the FIFO data for this packet into memory */ | |
1338 | while (bytes > 0) { | |
1339 | *ptr++ = __cvmx_usb_read_csr32(usb, USB_FIFO_ADDRESS(channel, usb->index)); | |
1340 | bytes -= 4; | |
1341 | } | |
1342 | CVMX_SYNCW; | |
1343 | ||
1344 | return; | |
1345 | } | |
1346 | ||
1347 | ||
1348 | /** | |
1349 | * Fill the TX hardware fifo with data out of the software | |
1350 | * fifos | |
1351 | * | |
cb61c600 | 1352 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1353 | * @fifo: Software fifo to use |
1354 | * @available: Amount of space in the hardware fifo | |
1355 | * | |
1356 | * Returns: Non zero if the hardware fifo was too small and needs | |
1357 | * to be serviced again. | |
1358 | */ | |
cb61c600 AK |
1359 | static int __cvmx_usb_fill_tx_hw(struct cvmx_usb_state *usb, |
1360 | struct cvmx_usb_tx_fifo *fifo, int available) | |
6570b4a9 AK |
1361 | { |
1362 | /* | |
1363 | * We're done either when there isn't anymore space or the software FIFO | |
1364 | * is empty | |
1365 | */ | |
1366 | while (available && (fifo->head != fifo->tail)) { | |
1367 | int i = fifo->tail; | |
1368 | const uint32_t *ptr = cvmx_phys_to_ptr(fifo->entry[i].address); | |
1369 | uint64_t csr_address = USB_FIFO_ADDRESS(fifo->entry[i].channel, usb->index) ^ 4; | |
1370 | int words = available; | |
1371 | ||
1372 | /* Limit the amount of data to waht the SW fifo has */ | |
1373 | if (fifo->entry[i].size <= available) { | |
1374 | words = fifo->entry[i].size; | |
1375 | fifo->tail++; | |
1376 | if (fifo->tail > MAX_CHANNELS) | |
1377 | fifo->tail = 0; | |
1378 | } | |
1379 | ||
1380 | /* Update the next locations and counts */ | |
1381 | available -= words; | |
1382 | fifo->entry[i].address += words * 4; | |
1383 | fifo->entry[i].size -= words; | |
1384 | ||
1385 | /* | |
1386 | * Write the HW fifo data. The read every three writes is due | |
1387 | * to an errata on CN3XXX chips | |
1388 | */ | |
1389 | while (words > 3) { | |
1390 | cvmx_write64_uint32(csr_address, *ptr++); | |
1391 | cvmx_write64_uint32(csr_address, *ptr++); | |
1392 | cvmx_write64_uint32(csr_address, *ptr++); | |
1393 | cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); | |
1394 | words -= 3; | |
1395 | } | |
1396 | cvmx_write64_uint32(csr_address, *ptr++); | |
1397 | if (--words) { | |
1398 | cvmx_write64_uint32(csr_address, *ptr++); | |
1399 | if (--words) | |
1400 | cvmx_write64_uint32(csr_address, *ptr++); | |
1401 | } | |
1402 | cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); | |
1403 | } | |
1404 | return fifo->head != fifo->tail; | |
1405 | } | |
1406 | ||
1407 | ||
1408 | /** | |
1409 | * Check the hardware FIFOs and fill them as needed | |
1410 | * | |
cb61c600 | 1411 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 | 1412 | */ |
cb61c600 | 1413 | static void __cvmx_usb_poll_tx_fifo(struct cvmx_usb_state *usb) |
6570b4a9 AK |
1414 | { |
1415 | if (usb->periodic.head != usb->periodic.tail) { | |
1416 | union cvmx_usbcx_hptxsts tx_status; | |
1417 | tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXSTS(usb->index)); | |
1418 | if (__cvmx_usb_fill_tx_hw(usb, &usb->periodic, tx_status.s.ptxfspcavail)) | |
1419 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, ptxfempmsk, 1); | |
1420 | else | |
1421 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, ptxfempmsk, 0); | |
1422 | } | |
1423 | ||
1424 | if (usb->nonperiodic.head != usb->nonperiodic.tail) { | |
1425 | union cvmx_usbcx_gnptxsts tx_status; | |
1426 | tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXSTS(usb->index)); | |
1427 | if (__cvmx_usb_fill_tx_hw(usb, &usb->nonperiodic, tx_status.s.nptxfspcavail)) | |
1428 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, nptxfempmsk, 1); | |
1429 | else | |
1430 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, nptxfempmsk, 0); | |
1431 | } | |
1432 | ||
1433 | return; | |
1434 | } | |
1435 | ||
1436 | ||
1437 | /** | |
1438 | * Fill the TX FIFO with an outgoing packet | |
1439 | * | |
cb61c600 | 1440 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1441 | * @channel: Channel number to get packet from |
1442 | */ | |
cb61c600 | 1443 | static void __cvmx_usb_fill_tx_fifo(struct cvmx_usb_state *usb, int channel) |
6570b4a9 AK |
1444 | { |
1445 | union cvmx_usbcx_hccharx hcchar; | |
1446 | union cvmx_usbcx_hcspltx usbc_hcsplt; | |
1447 | union cvmx_usbcx_hctsizx usbc_hctsiz; | |
1448 | struct cvmx_usb_tx_fifo *fifo; | |
1449 | ||
1450 | /* We only need to fill data on outbound channels */ | |
1451 | hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index)); | |
1452 | if (hcchar.s.epdir != CVMX_USB_DIRECTION_OUT) | |
1453 | return; | |
1454 | ||
1455 | /* OUT Splits only have data on the start and not the complete */ | |
1456 | usbc_hcsplt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index)); | |
1457 | if (usbc_hcsplt.s.spltena && usbc_hcsplt.s.compsplt) | |
1458 | return; | |
1459 | ||
1460 | /* | |
1461 | * Find out how many bytes we need to fill and convert it into 32bit | |
1462 | * words. | |
1463 | */ | |
1464 | usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index)); | |
1465 | if (!usbc_hctsiz.s.xfersize) | |
1466 | return; | |
1467 | ||
1468 | if ((hcchar.s.eptype == CVMX_USB_TRANSFER_INTERRUPT) || | |
1469 | (hcchar.s.eptype == CVMX_USB_TRANSFER_ISOCHRONOUS)) | |
1470 | fifo = &usb->periodic; | |
1471 | else | |
1472 | fifo = &usb->nonperiodic; | |
1473 | ||
1474 | fifo->entry[fifo->head].channel = channel; | |
1475 | fifo->entry[fifo->head].address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8); | |
1476 | fifo->entry[fifo->head].size = (usbc_hctsiz.s.xfersize+3)>>2; | |
1477 | fifo->head++; | |
1478 | if (fifo->head > MAX_CHANNELS) | |
1479 | fifo->head = 0; | |
1480 | ||
1481 | __cvmx_usb_poll_tx_fifo(usb); | |
1482 | ||
1483 | return; | |
1484 | } | |
1485 | ||
1486 | /** | |
1487 | * Perform channel specific setup for Control transactions. All | |
1488 | * the generic stuff will already have been done in | |
1489 | * __cvmx_usb_start_channel() | |
1490 | * | |
cb61c600 | 1491 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1492 | * @channel: Channel to setup |
1493 | * @pipe: Pipe for control transaction | |
1494 | */ | |
cb61c600 | 1495 | static void __cvmx_usb_start_channel_control(struct cvmx_usb_state *usb, |
6570b4a9 AK |
1496 | int channel, |
1497 | struct cvmx_usb_pipe *pipe) | |
1498 | { | |
1499 | struct cvmx_usb_transaction *transaction = pipe->head; | |
1500 | union cvmx_usb_control_header *header = | |
1501 | cvmx_phys_to_ptr(transaction->control_header); | |
1502 | int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes; | |
1503 | int packets_to_transfer; | |
1504 | union cvmx_usbcx_hctsizx usbc_hctsiz; | |
1505 | ||
1506 | usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index)); | |
1507 | ||
1508 | switch (transaction->stage) { | |
1509 | case CVMX_USB_STAGE_NON_CONTROL: | |
1510 | case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE: | |
1511 | cvmx_dprintf("%s: ERROR - Non control stage\n", __FUNCTION__); | |
1512 | break; | |
1513 | case CVMX_USB_STAGE_SETUP: | |
1514 | usbc_hctsiz.s.pid = 3; /* Setup */ | |
1515 | bytes_to_transfer = sizeof(*header); | |
1516 | /* All Control operations start with a setup going OUT */ | |
1517 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, CVMX_USB_DIRECTION_OUT); | |
1518 | /* | |
1519 | * Setup send the control header instead of the buffer data. The | |
1520 | * buffer data will be used in the next stage | |
1521 | */ | |
1522 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, transaction->control_header); | |
1523 | break; | |
1524 | case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE: | |
1525 | usbc_hctsiz.s.pid = 3; /* Setup */ | |
1526 | bytes_to_transfer = 0; | |
1527 | /* All Control operations start with a setup going OUT */ | |
1528 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, CVMX_USB_DIRECTION_OUT); | |
1529 | USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1); | |
1530 | break; | |
1531 | case CVMX_USB_STAGE_DATA: | |
1532 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); | |
1533 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
1534 | if (header->s.request_type & 0x80) | |
1535 | bytes_to_transfer = 0; | |
1536 | else if (bytes_to_transfer > pipe->max_packet) | |
1537 | bytes_to_transfer = pipe->max_packet; | |
1538 | } | |
1539 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), | |
1540 | union cvmx_usbcx_hccharx, epdir, | |
1541 | ((header->s.request_type & 0x80) ? | |
1542 | CVMX_USB_DIRECTION_IN : | |
1543 | CVMX_USB_DIRECTION_OUT)); | |
1544 | break; | |
1545 | case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE: | |
1546 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); | |
1547 | if (!(header->s.request_type & 0x80)) | |
1548 | bytes_to_transfer = 0; | |
1549 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), | |
1550 | union cvmx_usbcx_hccharx, epdir, | |
1551 | ((header->s.request_type & 0x80) ? | |
1552 | CVMX_USB_DIRECTION_IN : | |
1553 | CVMX_USB_DIRECTION_OUT)); | |
1554 | USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1); | |
1555 | break; | |
1556 | case CVMX_USB_STAGE_STATUS: | |
1557 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); | |
1558 | bytes_to_transfer = 0; | |
1559 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, | |
1560 | ((header->s.request_type & 0x80) ? | |
1561 | CVMX_USB_DIRECTION_OUT : | |
1562 | CVMX_USB_DIRECTION_IN)); | |
1563 | break; | |
1564 | case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE: | |
1565 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); | |
1566 | bytes_to_transfer = 0; | |
1567 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, | |
1568 | ((header->s.request_type & 0x80) ? | |
1569 | CVMX_USB_DIRECTION_OUT : | |
1570 | CVMX_USB_DIRECTION_IN)); | |
1571 | USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1); | |
1572 | break; | |
1573 | } | |
1574 | ||
1575 | /* | |
1576 | * Make sure the transfer never exceeds the byte limit of the hardware. | |
1577 | * Further bytes will be sent as continued transactions | |
1578 | */ | |
1579 | if (bytes_to_transfer > MAX_TRANSFER_BYTES) { | |
1580 | /* Round MAX_TRANSFER_BYTES to a multiple of out packet size */ | |
1581 | bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet; | |
1582 | bytes_to_transfer *= pipe->max_packet; | |
1583 | } | |
1584 | ||
1585 | /* | |
1586 | * Calculate the number of packets to transfer. If the length is zero | |
1587 | * we still need to transfer one packet | |
1588 | */ | |
1589 | packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet; | |
1590 | if (packets_to_transfer == 0) | |
1591 | packets_to_transfer = 1; | |
1592 | else if ((packets_to_transfer > 1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) { | |
1593 | /* | |
1594 | * Limit to one packet when not using DMA. Channels must be | |
1595 | * restarted between every packet for IN transactions, so there | |
1596 | * is no reason to do multiple packets in a row | |
1597 | */ | |
1598 | packets_to_transfer = 1; | |
1599 | bytes_to_transfer = packets_to_transfer * pipe->max_packet; | |
1600 | } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) { | |
1601 | /* | |
1602 | * Limit the number of packet and data transferred to what the | |
1603 | * hardware can handle | |
1604 | */ | |
1605 | packets_to_transfer = MAX_TRANSFER_PACKETS; | |
1606 | bytes_to_transfer = packets_to_transfer * pipe->max_packet; | |
1607 | } | |
1608 | ||
1609 | usbc_hctsiz.s.xfersize = bytes_to_transfer; | |
1610 | usbc_hctsiz.s.pktcnt = packets_to_transfer; | |
1611 | ||
1612 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32); | |
1613 | return; | |
1614 | } | |
1615 | ||
1616 | ||
1617 | /** | |
1618 | * Start a channel to perform the pipe's head transaction | |
1619 | * | |
cb61c600 | 1620 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1621 | * @channel: Channel to setup |
1622 | * @pipe: Pipe to start | |
1623 | */ | |
cb61c600 | 1624 | static void __cvmx_usb_start_channel(struct cvmx_usb_state *usb, |
6570b4a9 AK |
1625 | int channel, |
1626 | struct cvmx_usb_pipe *pipe) | |
1627 | { | |
1628 | struct cvmx_usb_transaction *transaction = pipe->head; | |
1629 | ||
1630 | /* Make sure all writes to the DMA region get flushed */ | |
1631 | CVMX_SYNCW; | |
1632 | ||
1633 | /* Attach the channel to the pipe */ | |
1634 | usb->pipe_for_channel[channel] = pipe; | |
1635 | pipe->channel = channel; | |
1636 | pipe->flags |= __CVMX_USB_PIPE_FLAGS_SCHEDULED; | |
1637 | ||
1638 | /* Mark this channel as in use */ | |
1639 | usb->idle_hardware_channels &= ~(1<<channel); | |
1640 | ||
1641 | /* Enable the channel interrupt bits */ | |
1642 | { | |
1643 | union cvmx_usbcx_hcintx usbc_hcint; | |
1644 | union cvmx_usbcx_hcintmskx usbc_hcintmsk; | |
1645 | union cvmx_usbcx_haintmsk usbc_haintmsk; | |
1646 | ||
1647 | /* Clear all channel status bits */ | |
1648 | usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index)); | |
1649 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index), usbc_hcint.u32); | |
1650 | ||
1651 | usbc_hcintmsk.u32 = 0; | |
1652 | usbc_hcintmsk.s.chhltdmsk = 1; | |
1653 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) { | |
1654 | /* | |
1655 | * Channels need these extra interrupts when we aren't | |
1656 | * in DMA mode. | |
1657 | */ | |
1658 | usbc_hcintmsk.s.datatglerrmsk = 1; | |
1659 | usbc_hcintmsk.s.frmovrunmsk = 1; | |
1660 | usbc_hcintmsk.s.bblerrmsk = 1; | |
1661 | usbc_hcintmsk.s.xacterrmsk = 1; | |
1662 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
1663 | /* | |
1664 | * Splits don't generate xfercompl, so we need | |
1665 | * ACK and NYET. | |
1666 | */ | |
1667 | usbc_hcintmsk.s.nyetmsk = 1; | |
1668 | usbc_hcintmsk.s.ackmsk = 1; | |
1669 | } | |
1670 | usbc_hcintmsk.s.nakmsk = 1; | |
1671 | usbc_hcintmsk.s.stallmsk = 1; | |
1672 | usbc_hcintmsk.s.xfercomplmsk = 1; | |
1673 | } | |
1674 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), usbc_hcintmsk.u32); | |
1675 | ||
1676 | /* Enable the channel interrupt to propagate */ | |
1677 | usbc_haintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index)); | |
1678 | usbc_haintmsk.s.haintmsk |= 1<<channel; | |
1679 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index), usbc_haintmsk.u32); | |
1680 | } | |
1681 | ||
1682 | /* Setup the locations the DMA engines use */ | |
1683 | { | |
1684 | uint64_t dma_address = transaction->buffer + transaction->actual_bytes; | |
1685 | if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) | |
1686 | dma_address = transaction->buffer + transaction->iso_packets[0].offset + transaction->actual_bytes; | |
1687 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, dma_address); | |
1688 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, dma_address); | |
1689 | } | |
1690 | ||
1691 | /* Setup both the size of the transfer and the SPLIT characteristics */ | |
1692 | { | |
1693 | union cvmx_usbcx_hcspltx usbc_hcsplt = {.u32 = 0}; | |
1694 | union cvmx_usbcx_hctsizx usbc_hctsiz = {.u32 = 0}; | |
1695 | int packets_to_transfer; | |
1696 | int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes; | |
1697 | ||
1698 | /* | |
1699 | * ISOCHRONOUS transactions store each individual transfer size | |
1700 | * in the packet structure, not the global buffer_length | |
1701 | */ | |
1702 | if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) | |
1703 | bytes_to_transfer = transaction->iso_packets[0].length - transaction->actual_bytes; | |
1704 | ||
1705 | /* | |
1706 | * We need to do split transactions when we are talking to non | |
1707 | * high speed devices that are behind a high speed hub | |
1708 | */ | |
1709 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
1710 | /* | |
1711 | * On the start split phase (stage is even) record the | |
1712 | * frame number we will need to send the split complete. | |
1713 | * We only store the lower two bits since the time ahead | |
1714 | * can only be two frames | |
1715 | */ | |
1716 | if ((transaction->stage&1) == 0) { | |
1717 | if (transaction->type == CVMX_USB_TRANSFER_BULK) | |
1718 | pipe->split_sc_frame = (usb->frame_number + 1) & 0x7f; | |
1719 | else | |
1720 | pipe->split_sc_frame = (usb->frame_number + 2) & 0x7f; | |
1721 | } else | |
1722 | pipe->split_sc_frame = -1; | |
1723 | ||
1724 | usbc_hcsplt.s.spltena = 1; | |
1725 | usbc_hcsplt.s.hubaddr = pipe->hub_device_addr; | |
1726 | usbc_hcsplt.s.prtaddr = pipe->hub_port; | |
1727 | usbc_hcsplt.s.compsplt = (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE); | |
1728 | ||
1729 | /* | |
1730 | * SPLIT transactions can only ever transmit one data | |
1731 | * packet so limit the transfer size to the max packet | |
1732 | * size | |
1733 | */ | |
1734 | if (bytes_to_transfer > pipe->max_packet) | |
1735 | bytes_to_transfer = pipe->max_packet; | |
1736 | ||
1737 | /* | |
1738 | * ISOCHRONOUS OUT splits are unique in that they limit | |
1739 | * data transfers to 188 byte chunks representing the | |
1740 | * begin/middle/end of the data or all | |
1741 | */ | |
1742 | if (!usbc_hcsplt.s.compsplt && | |
1743 | (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) && | |
1744 | (pipe->transfer_type == CVMX_USB_TRANSFER_ISOCHRONOUS)) { | |
1745 | /* | |
1746 | * Clear the split complete frame number as | |
1747 | * there isn't going to be a split complete | |
1748 | */ | |
1749 | pipe->split_sc_frame = -1; | |
1750 | /* | |
1751 | * See if we've started this transfer and sent | |
1752 | * data | |
1753 | */ | |
1754 | if (transaction->actual_bytes == 0) { | |
1755 | /* | |
1756 | * Nothing sent yet, this is either a | |
1757 | * begin or the entire payload | |
1758 | */ | |
1759 | if (bytes_to_transfer <= 188) | |
1760 | /* Entire payload in one go */ | |
1761 | usbc_hcsplt.s.xactpos = 3; | |
1762 | else | |
1763 | /* First part of payload */ | |
1764 | usbc_hcsplt.s.xactpos = 2; | |
1765 | } else { | |
1766 | /* | |
1767 | * Continuing the previous data, we must | |
1768 | * either be in the middle or at the end | |
1769 | */ | |
1770 | if (bytes_to_transfer <= 188) | |
1771 | /* End of payload */ | |
1772 | usbc_hcsplt.s.xactpos = 1; | |
1773 | else | |
1774 | /* Middle of payload */ | |
1775 | usbc_hcsplt.s.xactpos = 0; | |
1776 | } | |
1777 | /* | |
1778 | * Again, the transfer size is limited to 188 | |
1779 | * bytes | |
1780 | */ | |
1781 | if (bytes_to_transfer > 188) | |
1782 | bytes_to_transfer = 188; | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | /* | |
1787 | * Make sure the transfer never exceeds the byte limit of the | |
1788 | * hardware. Further bytes will be sent as continued | |
1789 | * transactions | |
1790 | */ | |
1791 | if (bytes_to_transfer > MAX_TRANSFER_BYTES) { | |
1792 | /* | |
1793 | * Round MAX_TRANSFER_BYTES to a multiple of out packet | |
1794 | * size | |
1795 | */ | |
1796 | bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet; | |
1797 | bytes_to_transfer *= pipe->max_packet; | |
1798 | } | |
1799 | ||
1800 | /* | |
1801 | * Calculate the number of packets to transfer. If the length is | |
1802 | * zero we still need to transfer one packet | |
1803 | */ | |
1804 | packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet; | |
1805 | if (packets_to_transfer == 0) | |
1806 | packets_to_transfer = 1; | |
1807 | else if ((packets_to_transfer > 1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) { | |
1808 | /* | |
1809 | * Limit to one packet when not using DMA. Channels must | |
1810 | * be restarted between every packet for IN | |
1811 | * transactions, so there is no reason to do multiple | |
1812 | * packets in a row | |
1813 | */ | |
1814 | packets_to_transfer = 1; | |
1815 | bytes_to_transfer = packets_to_transfer * pipe->max_packet; | |
1816 | } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) { | |
1817 | /* | |
1818 | * Limit the number of packet and data transferred to | |
1819 | * what the hardware can handle | |
1820 | */ | |
1821 | packets_to_transfer = MAX_TRANSFER_PACKETS; | |
1822 | bytes_to_transfer = packets_to_transfer * pipe->max_packet; | |
1823 | } | |
1824 | ||
1825 | usbc_hctsiz.s.xfersize = bytes_to_transfer; | |
1826 | usbc_hctsiz.s.pktcnt = packets_to_transfer; | |
1827 | ||
1828 | /* Update the DATA0/DATA1 toggle */ | |
1829 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); | |
1830 | /* | |
1831 | * High speed pipes may need a hardware ping before they start | |
1832 | */ | |
1833 | if (pipe->flags & __CVMX_USB_PIPE_FLAGS_NEED_PING) | |
1834 | usbc_hctsiz.s.dopng = 1; | |
1835 | ||
1836 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index), usbc_hcsplt.u32); | |
1837 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32); | |
1838 | } | |
1839 | ||
1840 | /* Setup the Host Channel Characteristics Register */ | |
1841 | { | |
1842 | union cvmx_usbcx_hccharx usbc_hcchar = {.u32 = 0}; | |
1843 | ||
1844 | /* | |
1845 | * Set the startframe odd/even properly. This is only used for | |
1846 | * periodic | |
1847 | */ | |
1848 | usbc_hcchar.s.oddfrm = usb->frame_number&1; | |
1849 | ||
1850 | /* | |
1851 | * Set the number of back to back packets allowed by this | |
1852 | * endpoint. Split transactions interpret "ec" as the number of | |
1853 | * immediate retries of failure. These retries happen too | |
1854 | * quickly, so we disable these entirely for splits | |
1855 | */ | |
1856 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) | |
1857 | usbc_hcchar.s.ec = 1; | |
1858 | else if (pipe->multi_count < 1) | |
1859 | usbc_hcchar.s.ec = 1; | |
1860 | else if (pipe->multi_count > 3) | |
1861 | usbc_hcchar.s.ec = 3; | |
1862 | else | |
1863 | usbc_hcchar.s.ec = pipe->multi_count; | |
1864 | ||
1865 | /* Set the rest of the endpoint specific settings */ | |
1866 | usbc_hcchar.s.devaddr = pipe->device_addr; | |
1867 | usbc_hcchar.s.eptype = transaction->type; | |
1868 | usbc_hcchar.s.lspddev = (pipe->device_speed == CVMX_USB_SPEED_LOW); | |
1869 | usbc_hcchar.s.epdir = pipe->transfer_dir; | |
1870 | usbc_hcchar.s.epnum = pipe->endpoint_num; | |
1871 | usbc_hcchar.s.mps = pipe->max_packet; | |
1872 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32); | |
1873 | } | |
1874 | ||
1875 | /* Do transaction type specific fixups as needed */ | |
1876 | switch (transaction->type) { | |
1877 | case CVMX_USB_TRANSFER_CONTROL: | |
1878 | __cvmx_usb_start_channel_control(usb, channel, pipe); | |
1879 | break; | |
1880 | case CVMX_USB_TRANSFER_BULK: | |
1881 | case CVMX_USB_TRANSFER_INTERRUPT: | |
1882 | break; | |
1883 | case CVMX_USB_TRANSFER_ISOCHRONOUS: | |
1884 | if (!__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
1885 | /* | |
1886 | * ISO transactions require different PIDs depending on | |
1887 | * direction and how many packets are needed | |
1888 | */ | |
1889 | if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) { | |
1890 | if (pipe->multi_count < 2) /* Need DATA0 */ | |
1891 | USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), union cvmx_usbcx_hctsizx, pid, 0); | |
1892 | else /* Need MDATA */ | |
1893 | USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), union cvmx_usbcx_hctsizx, pid, 3); | |
1894 | } | |
1895 | } | |
1896 | break; | |
1897 | } | |
1898 | { | |
1899 | union cvmx_usbcx_hctsizx usbc_hctsiz = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index))}; | |
1900 | transaction->xfersize = usbc_hctsiz.s.xfersize; | |
1901 | transaction->pktcnt = usbc_hctsiz.s.pktcnt; | |
1902 | } | |
1903 | /* Remeber when we start a split transaction */ | |
1904 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) | |
1905 | usb->active_split = transaction; | |
1906 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, chena, 1); | |
1907 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) | |
1908 | __cvmx_usb_fill_tx_fifo(usb, channel); | |
1909 | return; | |
1910 | } | |
1911 | ||
1912 | ||
1913 | /** | |
1914 | * Find a pipe that is ready to be scheduled to hardware. | |
cb61c600 | 1915 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1916 | * @list: Pipe list to search |
1917 | * @current_frame: | |
1918 | * Frame counter to use as a time reference. | |
1919 | * | |
1920 | * Returns: Pipe or NULL if none are ready | |
1921 | */ | |
cb61c600 | 1922 | static struct cvmx_usb_pipe *__cvmx_usb_find_ready_pipe(struct cvmx_usb_state *usb, struct cvmx_usb_pipe_list *list, uint64_t current_frame) |
6570b4a9 AK |
1923 | { |
1924 | struct cvmx_usb_pipe *pipe = list->head; | |
1925 | while (pipe) { | |
1926 | if (!(pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED) && pipe->head && | |
1927 | (pipe->next_tx_frame <= current_frame) && | |
1928 | ((pipe->split_sc_frame == -1) || ((((int)current_frame - (int)pipe->split_sc_frame) & 0x7f) < 0x40)) && | |
1929 | (!usb->active_split || (usb->active_split == pipe->head))) { | |
1930 | CVMX_PREFETCH(pipe, 128); | |
1931 | CVMX_PREFETCH(pipe->head, 0); | |
1932 | return pipe; | |
1933 | } | |
1934 | pipe = pipe->next; | |
1935 | } | |
1936 | return NULL; | |
1937 | } | |
1938 | ||
1939 | ||
1940 | /** | |
1941 | * Called whenever a pipe might need to be scheduled to the | |
1942 | * hardware. | |
1943 | * | |
cb61c600 | 1944 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
1945 | * @is_sof: True if this schedule was called on a SOF interrupt. |
1946 | */ | |
cb61c600 | 1947 | static void __cvmx_usb_schedule(struct cvmx_usb_state *usb, int is_sof) |
6570b4a9 AK |
1948 | { |
1949 | int channel; | |
1950 | struct cvmx_usb_pipe *pipe; | |
1951 | int need_sof; | |
1952 | enum cvmx_usb_transfer ttype; | |
1953 | ||
1954 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) { | |
1955 | /* | |
1956 | * Without DMA we need to be careful to not schedule something | |
1957 | * at the end of a frame and cause an overrun. | |
1958 | */ | |
1959 | union cvmx_usbcx_hfnum hfnum = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index))}; | |
1960 | union cvmx_usbcx_hfir hfir = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFIR(usb->index))}; | |
1961 | if (hfnum.s.frrem < hfir.s.frint/4) | |
1962 | goto done; | |
1963 | } | |
1964 | ||
1965 | while (usb->idle_hardware_channels) { | |
1966 | /* Find an idle channel */ | |
1967 | channel = __fls(usb->idle_hardware_channels); | |
1968 | if (unlikely(channel > 7)) | |
1969 | break; | |
1970 | ||
1971 | /* Find a pipe needing service */ | |
1972 | pipe = NULL; | |
1973 | if (is_sof) { | |
1974 | /* | |
1975 | * Only process periodic pipes on SOF interrupts. This | |
1976 | * way we are sure that the periodic data is sent in the | |
1977 | * beginning of the frame | |
1978 | */ | |
1979 | pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_ISOCHRONOUS, usb->frame_number); | |
1980 | if (likely(!pipe)) | |
1981 | pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_INTERRUPT, usb->frame_number); | |
1982 | } | |
1983 | if (likely(!pipe)) { | |
1984 | pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_CONTROL, usb->frame_number); | |
1985 | if (likely(!pipe)) | |
1986 | pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_BULK, usb->frame_number); | |
1987 | } | |
1988 | if (!pipe) | |
1989 | break; | |
1990 | ||
1991 | __cvmx_usb_start_channel(usb, channel, pipe); | |
1992 | } | |
1993 | ||
1994 | done: | |
1995 | /* | |
1996 | * Only enable SOF interrupts when we have transactions pending in the | |
1997 | * future that might need to be scheduled | |
1998 | */ | |
1999 | need_sof = 0; | |
2000 | for (ttype = CVMX_USB_TRANSFER_CONTROL; ttype <= CVMX_USB_TRANSFER_INTERRUPT; ttype++) { | |
2001 | pipe = usb->active_pipes[ttype].head; | |
2002 | while (pipe) { | |
2003 | if (pipe->next_tx_frame > usb->frame_number) { | |
2004 | need_sof = 1; | |
2005 | break; | |
2006 | } | |
2007 | pipe = pipe->next; | |
2008 | } | |
2009 | } | |
2010 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, sofmsk, need_sof); | |
2011 | return; | |
2012 | } | |
2013 | ||
75ee5124 AK |
2014 | static inline struct octeon_hcd *cvmx_usb_to_octeon(struct cvmx_usb_state *p) |
2015 | { | |
2016 | return container_of(p, struct octeon_hcd, usb); | |
2017 | } | |
6570b4a9 | 2018 | |
75ee5124 | 2019 | static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p) |
6570b4a9 | 2020 | { |
75ee5124 AK |
2021 | return container_of((void *)p, struct usb_hcd, hcd_priv); |
2022 | } | |
2023 | ||
2024 | static void octeon_usb_urb_complete_callback(struct cvmx_usb_state *usb, | |
2025 | enum cvmx_usb_complete status, | |
60f81507 | 2026 | struct cvmx_usb_pipe *pipe, |
3e1674c0 AK |
2027 | struct cvmx_usb_transaction |
2028 | *transaction, | |
75ee5124 | 2029 | int bytes_transferred, |
0cce1004 | 2030 | struct urb *urb) |
75ee5124 AK |
2031 | { |
2032 | struct octeon_hcd *priv = cvmx_usb_to_octeon(usb); | |
2033 | struct usb_hcd *hcd = octeon_to_hcd(priv); | |
2034 | struct device *dev = hcd->self.controller; | |
75ee5124 AK |
2035 | |
2036 | urb->actual_length = bytes_transferred; | |
2037 | urb->hcpriv = NULL; | |
2038 | ||
2039 | if (!list_empty(&urb->urb_list)) { | |
2040 | /* | |
2041 | * It is on the dequeue_list, but we are going to call | |
2042 | * usb_hcd_giveback_urb(), so we must clear it from | |
2043 | * the list. We got to it before the | |
2044 | * octeon_usb_urb_dequeue_work() tasklet did. | |
2045 | */ | |
2046 | list_del(&urb->urb_list); | |
2047 | /* No longer on the dequeue_list. */ | |
2048 | INIT_LIST_HEAD(&urb->urb_list); | |
6570b4a9 AK |
2049 | } |
2050 | ||
75ee5124 AK |
2051 | /* For Isochronous transactions we need to update the URB packet status |
2052 | list from data in our private copy */ | |
2053 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
2054 | int i; | |
2055 | /* | |
2056 | * The pointer to the private list is stored in the setup_packet | |
2057 | * field. | |
2058 | */ | |
2059 | struct cvmx_usb_iso_packet *iso_packet = | |
2060 | (struct cvmx_usb_iso_packet *) urb->setup_packet; | |
2061 | /* Recalculate the transfer size by adding up each packet */ | |
2062 | urb->actual_length = 0; | |
2063 | for (i = 0; i < urb->number_of_packets; i++) { | |
2064 | if (iso_packet[i].status == CVMX_USB_COMPLETE_SUCCESS) { | |
2065 | urb->iso_frame_desc[i].status = 0; | |
2066 | urb->iso_frame_desc[i].actual_length = iso_packet[i].length; | |
2067 | urb->actual_length += urb->iso_frame_desc[i].actual_length; | |
2068 | } else { | |
3e1674c0 | 2069 | dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%p transaction=%p size=%d\n", |
75ee5124 | 2070 | i, urb->number_of_packets, |
60f81507 | 2071 | iso_packet[i].status, pipe, |
3e1674c0 | 2072 | transaction, iso_packet[i].length); |
75ee5124 AK |
2073 | urb->iso_frame_desc[i].status = -EREMOTEIO; |
2074 | } | |
2075 | } | |
2076 | /* Free the private list now that we don't need it anymore */ | |
2077 | kfree(iso_packet); | |
2078 | urb->setup_packet = NULL; | |
2079 | } | |
6570b4a9 | 2080 | |
75ee5124 AK |
2081 | switch (status) { |
2082 | case CVMX_USB_COMPLETE_SUCCESS: | |
2083 | urb->status = 0; | |
2084 | break; | |
2085 | case CVMX_USB_COMPLETE_CANCEL: | |
2086 | if (urb->status == 0) | |
2087 | urb->status = -ENOENT; | |
2088 | break; | |
2089 | case CVMX_USB_COMPLETE_STALL: | |
3e1674c0 AK |
2090 | dev_dbg(dev, "status=stall pipe=%p transaction=%p size=%d\n", |
2091 | pipe, transaction, bytes_transferred); | |
75ee5124 AK |
2092 | urb->status = -EPIPE; |
2093 | break; | |
2094 | case CVMX_USB_COMPLETE_BABBLEERR: | |
3e1674c0 AK |
2095 | dev_dbg(dev, "status=babble pipe=%p transaction=%p size=%d\n", |
2096 | pipe, transaction, bytes_transferred); | |
75ee5124 AK |
2097 | urb->status = -EPIPE; |
2098 | break; | |
2099 | case CVMX_USB_COMPLETE_SHORT: | |
3e1674c0 AK |
2100 | dev_dbg(dev, "status=short pipe=%p transaction=%p size=%d\n", |
2101 | pipe, transaction, bytes_transferred); | |
75ee5124 AK |
2102 | urb->status = -EREMOTEIO; |
2103 | break; | |
2104 | case CVMX_USB_COMPLETE_ERROR: | |
2105 | case CVMX_USB_COMPLETE_XACTERR: | |
2106 | case CVMX_USB_COMPLETE_DATATGLERR: | |
2107 | case CVMX_USB_COMPLETE_FRAMEERR: | |
3e1674c0 AK |
2108 | dev_dbg(dev, "status=%d pipe=%p transaction=%p size=%d\n", |
2109 | status, pipe, transaction, bytes_transferred); | |
75ee5124 AK |
2110 | urb->status = -EPROTO; |
2111 | break; | |
2112 | } | |
2113 | spin_unlock(&priv->lock); | |
2114 | usb_hcd_giveback_urb(octeon_to_hcd(priv), urb, urb->status); | |
2115 | spin_lock(&priv->lock); | |
6570b4a9 AK |
2116 | } |
2117 | ||
6570b4a9 AK |
2118 | /** |
2119 | * Signal the completion of a transaction and free it. The | |
2120 | * transaction will be removed from the pipe transaction list. | |
2121 | * | |
cb61c600 | 2122 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
2123 | * @pipe: Pipe the transaction is on |
2124 | * @transaction: | |
2125 | * Transaction that completed | |
2126 | * @complete_code: | |
2127 | * Completion code | |
2128 | */ | |
cb61c600 | 2129 | static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb, |
6570b4a9 AK |
2130 | struct cvmx_usb_pipe *pipe, |
2131 | struct cvmx_usb_transaction *transaction, | |
2132 | enum cvmx_usb_complete complete_code) | |
2133 | { | |
2134 | /* If this was a split then clear our split in progress marker */ | |
2135 | if (usb->active_split == transaction) | |
2136 | usb->active_split = NULL; | |
2137 | ||
2138 | /* | |
2139 | * Isochronous transactions need extra processing as they might not be | |
2140 | * done after a single data transfer | |
2141 | */ | |
2142 | if (unlikely(transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)) { | |
2143 | /* Update the number of bytes transferred in this ISO packet */ | |
2144 | transaction->iso_packets[0].length = transaction->actual_bytes; | |
2145 | transaction->iso_packets[0].status = complete_code; | |
2146 | ||
2147 | /* | |
2148 | * If there are more ISOs pending and we succeeded, schedule the | |
2149 | * next one | |
2150 | */ | |
2151 | if ((transaction->iso_number_packets > 1) && (complete_code == CVMX_USB_COMPLETE_SUCCESS)) { | |
2152 | /* No bytes transferred for this packet as of yet */ | |
2153 | transaction->actual_bytes = 0; | |
2154 | /* One less ISO waiting to transfer */ | |
2155 | transaction->iso_number_packets--; | |
2156 | /* Increment to the next location in our packet array */ | |
2157 | transaction->iso_packets++; | |
2158 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL; | |
2159 | goto done; | |
2160 | } | |
2161 | } | |
2162 | ||
2163 | /* Remove the transaction from the pipe list */ | |
2164 | if (transaction->next) | |
2165 | transaction->next->prev = transaction->prev; | |
2166 | else | |
2167 | pipe->tail = transaction->prev; | |
2168 | if (transaction->prev) | |
2169 | transaction->prev->next = transaction->next; | |
2170 | else | |
2171 | pipe->head = transaction->next; | |
2172 | if (!pipe->head) { | |
2173 | __cvmx_usb_remove_pipe(usb->active_pipes + pipe->transfer_type, pipe); | |
2174 | __cvmx_usb_append_pipe(&usb->idle_pipes, pipe); | |
2175 | ||
2176 | } | |
60f81507 | 2177 | octeon_usb_urb_complete_callback(usb, complete_code, pipe, |
3e1674c0 | 2178 | transaction, |
75ee5124 | 2179 | transaction->actual_bytes, |
0cce1004 | 2180 | transaction->urb); |
a2dfef06 | 2181 | kfree(transaction); |
6570b4a9 AK |
2182 | done: |
2183 | return; | |
2184 | } | |
2185 | ||
2186 | ||
2187 | /** | |
2188 | * Submit a usb transaction to a pipe. Called for all types | |
2189 | * of transactions. | |
2190 | * | |
2191 | * @usb: | |
60f81507 | 2192 | * @pipe: Which pipe to submit to. |
6570b4a9 AK |
2193 | * @type: Transaction type |
2194 | * @buffer: User buffer for the transaction | |
2195 | * @buffer_length: | |
2196 | * User buffer's length in bytes | |
2197 | * @control_header: | |
2198 | * For control transactions, the 8 byte standard header | |
2199 | * @iso_start_frame: | |
2200 | * For ISO transactions, the start frame | |
2201 | * @iso_number_packets: | |
2202 | * For ISO, the number of packet in the transaction. | |
2203 | * @iso_packets: | |
2204 | * A description of each ISO packet | |
0cce1004 | 2205 | * @urb: URB for the callback |
6570b4a9 | 2206 | * |
3e1674c0 | 2207 | * Returns: Transaction or NULL on failure. |
6570b4a9 | 2208 | */ |
3e1674c0 AK |
2209 | static struct cvmx_usb_transaction *__cvmx_usb_submit_transaction(struct cvmx_usb_state *usb, |
2210 | struct cvmx_usb_pipe *pipe, | |
2211 | enum cvmx_usb_transfer type, | |
2212 | uint64_t buffer, | |
2213 | int buffer_length, | |
2214 | uint64_t control_header, | |
2215 | int iso_start_frame, | |
2216 | int iso_number_packets, | |
2217 | struct cvmx_usb_iso_packet *iso_packets, | |
2218 | struct urb *urb) | |
6570b4a9 | 2219 | { |
6570b4a9 | 2220 | struct cvmx_usb_transaction *transaction; |
6570b4a9 | 2221 | |
6570b4a9 | 2222 | if (unlikely(pipe->transfer_type != type)) |
3e1674c0 | 2223 | return NULL; |
6570b4a9 | 2224 | |
a2dfef06 | 2225 | transaction = kzalloc(sizeof(*transaction), GFP_ATOMIC); |
6570b4a9 | 2226 | if (unlikely(!transaction)) |
3e1674c0 | 2227 | return NULL; |
6570b4a9 AK |
2228 | |
2229 | transaction->type = type; | |
2230 | transaction->buffer = buffer; | |
2231 | transaction->buffer_length = buffer_length; | |
2232 | transaction->control_header = control_header; | |
2233 | /* FIXME: This is not used, implement it. */ | |
2234 | transaction->iso_start_frame = iso_start_frame; | |
2235 | transaction->iso_number_packets = iso_number_packets; | |
2236 | transaction->iso_packets = iso_packets; | |
0cce1004 | 2237 | transaction->urb = urb; |
6570b4a9 AK |
2238 | if (transaction->type == CVMX_USB_TRANSFER_CONTROL) |
2239 | transaction->stage = CVMX_USB_STAGE_SETUP; | |
2240 | else | |
2241 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL; | |
2242 | ||
2243 | transaction->next = NULL; | |
2244 | if (pipe->tail) { | |
2245 | transaction->prev = pipe->tail; | |
2246 | transaction->prev->next = transaction; | |
2247 | } else { | |
2248 | if (pipe->next_tx_frame < usb->frame_number) | |
2249 | pipe->next_tx_frame = usb->frame_number + pipe->interval - | |
2250 | (usb->frame_number - pipe->next_tx_frame) % pipe->interval; | |
2251 | transaction->prev = NULL; | |
2252 | pipe->head = transaction; | |
2253 | __cvmx_usb_remove_pipe(&usb->idle_pipes, pipe); | |
2254 | __cvmx_usb_append_pipe(usb->active_pipes + pipe->transfer_type, pipe); | |
2255 | } | |
2256 | pipe->tail = transaction; | |
2257 | ||
6570b4a9 AK |
2258 | /* We may need to schedule the pipe if this was the head of the pipe */ |
2259 | if (!transaction->prev) | |
2260 | __cvmx_usb_schedule(usb, 0); | |
2261 | ||
3e1674c0 | 2262 | return transaction; |
6570b4a9 AK |
2263 | } |
2264 | ||
2265 | ||
2266 | /** | |
2267 | * Call to submit a USB Bulk transfer to a pipe. | |
2268 | * | |
cb61c600 | 2269 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2270 | * @pipe: Handle to the pipe for the transfer. |
9ccca707 | 2271 | * @urb: URB. |
6570b4a9 | 2272 | * |
3e1674c0 | 2273 | * Returns: A submitted transaction or NULL on failure. |
6570b4a9 | 2274 | */ |
3e1674c0 AK |
2275 | static struct cvmx_usb_transaction *cvmx_usb_submit_bulk(struct cvmx_usb_state *usb, |
2276 | struct cvmx_usb_pipe *pipe, | |
2277 | struct urb *urb) | |
6570b4a9 | 2278 | { |
3e1674c0 AK |
2279 | return __cvmx_usb_submit_transaction(usb, pipe, CVMX_USB_TRANSFER_BULK, |
2280 | urb->transfer_dma, | |
2281 | urb->transfer_buffer_length, | |
2282 | 0, /* control_header */ | |
2283 | 0, /* iso_start_frame */ | |
2284 | 0, /* iso_number_packets */ | |
2285 | NULL, /* iso_packets */ | |
2286 | urb); | |
6570b4a9 AK |
2287 | } |
2288 | ||
2289 | ||
2290 | /** | |
2291 | * Call to submit a USB Interrupt transfer to a pipe. | |
2292 | * | |
cb61c600 | 2293 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2294 | * @pipe: Handle to the pipe for the transfer. |
0cce1004 | 2295 | * @urb: URB returned when the callback is called. |
6570b4a9 | 2296 | * |
3e1674c0 | 2297 | * Returns: A submitted transaction or NULL on failure. |
6570b4a9 | 2298 | */ |
3e1674c0 AK |
2299 | static struct cvmx_usb_transaction *cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb, |
2300 | struct cvmx_usb_pipe *pipe, | |
2301 | struct urb *urb) | |
6570b4a9 | 2302 | { |
3e1674c0 AK |
2303 | return __cvmx_usb_submit_transaction(usb, pipe, |
2304 | CVMX_USB_TRANSFER_INTERRUPT, | |
2305 | urb->transfer_dma, | |
2306 | urb->transfer_buffer_length, | |
2307 | 0, /* control_header */ | |
2308 | 0, /* iso_start_frame */ | |
2309 | 0, /* iso_number_packets */ | |
2310 | NULL, /* iso_packets */ | |
2311 | urb); | |
6570b4a9 AK |
2312 | } |
2313 | ||
2314 | ||
2315 | /** | |
2316 | * Call to submit a USB Control transfer to a pipe. | |
2317 | * | |
cb61c600 | 2318 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2319 | * @pipe: Handle to the pipe for the transfer. |
2ae09e87 | 2320 | * @urb: URB. |
6570b4a9 | 2321 | * |
3e1674c0 | 2322 | * Returns: A submitted transaction or NULL on failure. |
6570b4a9 | 2323 | */ |
3e1674c0 AK |
2324 | static struct cvmx_usb_transaction *cvmx_usb_submit_control(struct cvmx_usb_state *usb, |
2325 | struct cvmx_usb_pipe *pipe, | |
2326 | struct urb *urb) | |
6570b4a9 | 2327 | { |
2ae09e87 AK |
2328 | int buffer_length = urb->transfer_buffer_length; |
2329 | uint64_t control_header = urb->setup_dma; | |
6570b4a9 AK |
2330 | union cvmx_usb_control_header *header = |
2331 | cvmx_phys_to_ptr(control_header); | |
2332 | ||
6570b4a9 AK |
2333 | if ((header->s.request_type & 0x80) == 0) |
2334 | buffer_length = le16_to_cpu(header->s.length); | |
2335 | ||
3e1674c0 AK |
2336 | return __cvmx_usb_submit_transaction(usb, pipe, |
2337 | CVMX_USB_TRANSFER_CONTROL, | |
2338 | urb->transfer_dma, buffer_length, | |
2339 | control_header, | |
2340 | 0, /* iso_start_frame */ | |
2341 | 0, /* iso_number_packets */ | |
2342 | NULL, /* iso_packets */ | |
2343 | urb); | |
6570b4a9 AK |
2344 | } |
2345 | ||
2346 | ||
2347 | /** | |
2348 | * Call to submit a USB Isochronous transfer to a pipe. | |
2349 | * | |
cb61c600 | 2350 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2351 | * @pipe: Handle to the pipe for the transfer. |
0cce1004 | 2352 | * @urb: URB returned when the callback is called. |
6570b4a9 | 2353 | * |
3e1674c0 | 2354 | * Returns: A submitted transaction or NULL on failure. |
6570b4a9 | 2355 | */ |
3e1674c0 AK |
2356 | static struct cvmx_usb_transaction *cvmx_usb_submit_isochronous(struct cvmx_usb_state *usb, |
2357 | struct cvmx_usb_pipe *pipe, | |
2358 | struct urb *urb) | |
6570b4a9 | 2359 | { |
e16b5e3f | 2360 | struct cvmx_usb_iso_packet *packets; |
6570b4a9 | 2361 | |
e16b5e3f | 2362 | packets = (struct cvmx_usb_iso_packet *) urb->setup_packet; |
3e1674c0 AK |
2363 | return __cvmx_usb_submit_transaction(usb, pipe, |
2364 | CVMX_USB_TRANSFER_ISOCHRONOUS, | |
2365 | urb->transfer_dma, | |
2366 | urb->transfer_buffer_length, | |
2367 | 0, /* control_header */ | |
2368 | urb->start_frame, | |
2369 | urb->number_of_packets, | |
2370 | packets, urb); | |
6570b4a9 AK |
2371 | } |
2372 | ||
2373 | ||
2374 | /** | |
2375 | * Cancel one outstanding request in a pipe. Canceling a request | |
2376 | * can fail if the transaction has already completed before cancel | |
2377 | * is called. Even after a successful cancel call, it may take | |
2378 | * a frame or two for the cvmx_usb_poll() function to call the | |
2379 | * associated callback. | |
2380 | * | |
cb61c600 | 2381 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2382 | * @pipe: Pipe to cancel requests in. |
3e1674c0 | 2383 | * @transaction: Transaction to cancel, returned by the submit function. |
6570b4a9 AK |
2384 | * |
2385 | * Returns: 0 or a negative error code. | |
2386 | */ | |
60f81507 AK |
2387 | static int cvmx_usb_cancel(struct cvmx_usb_state *usb, |
2388 | struct cvmx_usb_pipe *pipe, | |
3e1674c0 | 2389 | struct cvmx_usb_transaction *transaction) |
6570b4a9 | 2390 | { |
6570b4a9 AK |
2391 | /* |
2392 | * If the transaction is the HEAD of the queue and scheduled. We need to | |
2393 | * treat it special | |
2394 | */ | |
2395 | if ((pipe->head == transaction) && | |
2396 | (pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED)) { | |
2397 | union cvmx_usbcx_hccharx usbc_hcchar; | |
2398 | ||
2399 | usb->pipe_for_channel[pipe->channel] = NULL; | |
2400 | pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED; | |
2401 | ||
2402 | CVMX_SYNCW; | |
2403 | ||
2404 | usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index)); | |
2405 | /* | |
2406 | * If the channel isn't enabled then the transaction already | |
2407 | * completed. | |
2408 | */ | |
2409 | if (usbc_hcchar.s.chena) { | |
2410 | usbc_hcchar.s.chdis = 1; | |
2411 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index), usbc_hcchar.u32); | |
2412 | } | |
2413 | } | |
2414 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_CANCEL); | |
2415 | return 0; | |
2416 | } | |
2417 | ||
2418 | ||
2419 | /** | |
2420 | * Cancel all outstanding requests in a pipe. Logically all this | |
2421 | * does is call cvmx_usb_cancel() in a loop. | |
2422 | * | |
cb61c600 | 2423 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2424 | * @pipe: Pipe to cancel requests in. |
6570b4a9 AK |
2425 | * |
2426 | * Returns: 0 or a negative error code. | |
2427 | */ | |
60f81507 AK |
2428 | static int cvmx_usb_cancel_all(struct cvmx_usb_state *usb, |
2429 | struct cvmx_usb_pipe *pipe) | |
6570b4a9 | 2430 | { |
6570b4a9 AK |
2431 | /* Simply loop through and attempt to cancel each transaction */ |
2432 | while (pipe->head) { | |
3e1674c0 | 2433 | int result = cvmx_usb_cancel(usb, pipe, pipe->head); |
6570b4a9 AK |
2434 | if (unlikely(result != 0)) |
2435 | return result; | |
2436 | } | |
2437 | return 0; | |
2438 | } | |
2439 | ||
2440 | ||
2441 | /** | |
2442 | * Close a pipe created with cvmx_usb_open_pipe(). | |
2443 | * | |
cb61c600 | 2444 | * @usb: USB device state populated by cvmx_usb_initialize(). |
60f81507 | 2445 | * @pipe: Pipe to close. |
6570b4a9 AK |
2446 | * |
2447 | * Returns: 0 or a negative error code. EBUSY is returned if the pipe has | |
2448 | * outstanding transfers. | |
2449 | */ | |
60f81507 AK |
2450 | static int cvmx_usb_close_pipe(struct cvmx_usb_state *usb, |
2451 | struct cvmx_usb_pipe *pipe) | |
6570b4a9 | 2452 | { |
6570b4a9 AK |
2453 | /* Fail if the pipe has pending transactions */ |
2454 | if (unlikely(pipe->head)) | |
2455 | return -EBUSY; | |
2456 | ||
6570b4a9 | 2457 | __cvmx_usb_remove_pipe(&usb->idle_pipes, pipe); |
d2695a8a | 2458 | kfree(pipe); |
6570b4a9 AK |
2459 | |
2460 | return 0; | |
2461 | } | |
2462 | ||
6570b4a9 AK |
2463 | /** |
2464 | * Get the current USB protocol level frame number. The frame | |
2465 | * number is always in the range of 0-0x7ff. | |
2466 | * | |
cb61c600 | 2467 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
2468 | * |
2469 | * Returns: USB frame number | |
2470 | */ | |
cb61c600 | 2471 | static int cvmx_usb_get_frame_number(struct cvmx_usb_state *usb) |
6570b4a9 AK |
2472 | { |
2473 | int frame_number; | |
6570b4a9 AK |
2474 | union cvmx_usbcx_hfnum usbc_hfnum; |
2475 | ||
2476 | usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index)); | |
2477 | frame_number = usbc_hfnum.s.frnum; | |
2478 | ||
2479 | return frame_number; | |
2480 | } | |
2481 | ||
2482 | ||
2483 | /** | |
2484 | * Poll a channel for status | |
2485 | * | |
2486 | * @usb: USB device | |
2487 | * @channel: Channel to poll | |
2488 | * | |
2489 | * Returns: Zero on success | |
2490 | */ | |
cb61c600 | 2491 | static int __cvmx_usb_poll_channel(struct cvmx_usb_state *usb, int channel) |
6570b4a9 AK |
2492 | { |
2493 | union cvmx_usbcx_hcintx usbc_hcint; | |
2494 | union cvmx_usbcx_hctsizx usbc_hctsiz; | |
2495 | union cvmx_usbcx_hccharx usbc_hcchar; | |
2496 | struct cvmx_usb_pipe *pipe; | |
2497 | struct cvmx_usb_transaction *transaction; | |
2498 | int bytes_this_transfer; | |
2499 | int bytes_in_last_packet; | |
2500 | int packets_processed; | |
2501 | int buffer_space_left; | |
2502 | ||
2503 | /* Read the interrupt status bits for the channel */ | |
2504 | usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index)); | |
2505 | ||
2506 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) { | |
2507 | usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index)); | |
2508 | ||
2509 | if (usbc_hcchar.s.chena && usbc_hcchar.s.chdis) { | |
2510 | /* | |
2511 | * There seems to be a bug in CN31XX which can cause | |
2512 | * interrupt IN transfers to get stuck until we do a | |
2513 | * write of HCCHARX without changing things | |
2514 | */ | |
2515 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32); | |
2516 | return 0; | |
2517 | } | |
2518 | ||
2519 | /* | |
2520 | * In non DMA mode the channels don't halt themselves. We need | |
2521 | * to manually disable channels that are left running | |
2522 | */ | |
2523 | if (!usbc_hcint.s.chhltd) { | |
2524 | if (usbc_hcchar.s.chena) { | |
2525 | union cvmx_usbcx_hcintmskx hcintmsk; | |
2526 | /* Disable all interrupts except CHHLTD */ | |
2527 | hcintmsk.u32 = 0; | |
2528 | hcintmsk.s.chhltdmsk = 1; | |
2529 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), hcintmsk.u32); | |
2530 | usbc_hcchar.s.chdis = 1; | |
2531 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32); | |
2532 | return 0; | |
2533 | } else if (usbc_hcint.s.xfercompl) { | |
2534 | /* | |
2535 | * Successful IN/OUT with transfer complete. | |
2536 | * Channel halt isn't needed. | |
2537 | */ | |
2538 | } else { | |
2539 | cvmx_dprintf("USB%d: Channel %d interrupt without halt\n", usb->index, channel); | |
2540 | return 0; | |
2541 | } | |
2542 | } | |
2543 | } else { | |
2544 | /* | |
2545 | * There is are no interrupts that we need to process when the | |
2546 | * channel is still running | |
2547 | */ | |
2548 | if (!usbc_hcint.s.chhltd) | |
2549 | return 0; | |
2550 | } | |
2551 | ||
2552 | /* Disable the channel interrupts now that it is done */ | |
2553 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0); | |
2554 | usb->idle_hardware_channels |= (1<<channel); | |
2555 | ||
2556 | /* Make sure this channel is tied to a valid pipe */ | |
2557 | pipe = usb->pipe_for_channel[channel]; | |
2558 | CVMX_PREFETCH(pipe, 0); | |
2559 | CVMX_PREFETCH(pipe, 128); | |
2560 | if (!pipe) | |
2561 | return 0; | |
2562 | transaction = pipe->head; | |
2563 | CVMX_PREFETCH(transaction, 0); | |
2564 | ||
2565 | /* | |
2566 | * Disconnect this pipe from the HW channel. Later the schedule | |
2567 | * function will figure out which pipe needs to go | |
2568 | */ | |
2569 | usb->pipe_for_channel[channel] = NULL; | |
2570 | pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED; | |
2571 | ||
2572 | /* | |
2573 | * Read the channel config info so we can figure out how much data | |
2574 | * transfered | |
2575 | */ | |
2576 | usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index)); | |
2577 | usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index)); | |
2578 | ||
2579 | /* | |
2580 | * Calculating the number of bytes successfully transferred is dependent | |
2581 | * on the transfer direction | |
2582 | */ | |
2583 | packets_processed = transaction->pktcnt - usbc_hctsiz.s.pktcnt; | |
2584 | if (usbc_hcchar.s.epdir) { | |
2585 | /* | |
2586 | * IN transactions are easy. For every byte received the | |
2587 | * hardware decrements xfersize. All we need to do is subtract | |
2588 | * the current value of xfersize from its starting value and we | |
2589 | * know how many bytes were written to the buffer | |
2590 | */ | |
2591 | bytes_this_transfer = transaction->xfersize - usbc_hctsiz.s.xfersize; | |
2592 | } else { | |
2593 | /* | |
2594 | * OUT transaction don't decrement xfersize. Instead pktcnt is | |
2595 | * decremented on every successful packet send. The hardware | |
2596 | * does this when it receives an ACK, or NYET. If it doesn't | |
2597 | * receive one of these responses pktcnt doesn't change | |
2598 | */ | |
2599 | bytes_this_transfer = packets_processed * usbc_hcchar.s.mps; | |
2600 | /* | |
2601 | * The last packet may not be a full transfer if we didn't have | |
2602 | * enough data | |
2603 | */ | |
2604 | if (bytes_this_transfer > transaction->xfersize) | |
2605 | bytes_this_transfer = transaction->xfersize; | |
2606 | } | |
2607 | /* Figure out how many bytes were in the last packet of the transfer */ | |
2608 | if (packets_processed) | |
2609 | bytes_in_last_packet = bytes_this_transfer - (packets_processed-1) * usbc_hcchar.s.mps; | |
2610 | else | |
2611 | bytes_in_last_packet = bytes_this_transfer; | |
2612 | ||
2613 | /* | |
2614 | * As a special case, setup transactions output the setup header, not | |
2615 | * the user's data. For this reason we don't count setup data as bytes | |
2616 | * transferred | |
2617 | */ | |
2618 | if ((transaction->stage == CVMX_USB_STAGE_SETUP) || | |
2619 | (transaction->stage == CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE)) | |
2620 | bytes_this_transfer = 0; | |
2621 | ||
2622 | /* | |
2623 | * Add the bytes transferred to the running total. It is important that | |
2624 | * bytes_this_transfer doesn't count any data that needs to be | |
2625 | * retransmitted | |
2626 | */ | |
2627 | transaction->actual_bytes += bytes_this_transfer; | |
2628 | if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) | |
2629 | buffer_space_left = transaction->iso_packets[0].length - transaction->actual_bytes; | |
2630 | else | |
2631 | buffer_space_left = transaction->buffer_length - transaction->actual_bytes; | |
2632 | ||
2633 | /* | |
2634 | * We need to remember the PID toggle state for the next transaction. | |
2635 | * The hardware already updated it for the next transaction | |
2636 | */ | |
2637 | pipe->pid_toggle = !(usbc_hctsiz.s.pid == 0); | |
2638 | ||
2639 | /* | |
2640 | * For high speed bulk out, assume the next transaction will need to do | |
2641 | * a ping before proceeding. If this isn't true the ACK processing below | |
2642 | * will clear this flag | |
2643 | */ | |
2644 | if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) && | |
2645 | (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) && | |
2646 | (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT)) | |
2647 | pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING; | |
2648 | ||
2649 | if (usbc_hcint.s.stall) { | |
2650 | /* | |
2651 | * STALL as a response means this transaction cannot be | |
2652 | * completed because the device can't process transactions. Tell | |
2653 | * the user. Any data that was transferred will be counted on | |
2654 | * the actual bytes transferred | |
2655 | */ | |
2656 | pipe->pid_toggle = 0; | |
2657 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_STALL); | |
2658 | } else if (usbc_hcint.s.xacterr) { | |
2659 | /* | |
2660 | * We know at least one packet worked if we get a ACK or NAK. | |
2661 | * Reset the retry counter | |
2662 | */ | |
2663 | if (usbc_hcint.s.nak || usbc_hcint.s.ack) | |
2664 | transaction->retries = 0; | |
2665 | transaction->retries++; | |
2666 | if (transaction->retries > MAX_RETRIES) { | |
2667 | /* | |
2668 | * XactErr as a response means the device signaled | |
2669 | * something wrong with the transfer. For example, PID | |
2670 | * toggle errors cause these | |
2671 | */ | |
2672 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_XACTERR); | |
2673 | } else { | |
2674 | /* | |
2675 | * If this was a split then clear our split in progress | |
2676 | * marker | |
2677 | */ | |
2678 | if (usb->active_split == transaction) | |
2679 | usb->active_split = NULL; | |
2680 | /* | |
2681 | * Rewind to the beginning of the transaction by anding | |
2682 | * off the split complete bit | |
2683 | */ | |
2684 | transaction->stage &= ~1; | |
2685 | pipe->split_sc_frame = -1; | |
2686 | pipe->next_tx_frame += pipe->interval; | |
2687 | if (pipe->next_tx_frame < usb->frame_number) | |
2688 | pipe->next_tx_frame = usb->frame_number + pipe->interval - | |
2689 | (usb->frame_number - pipe->next_tx_frame) % pipe->interval; | |
2690 | } | |
2691 | } else if (usbc_hcint.s.bblerr) { | |
2692 | /* Babble Error (BblErr) */ | |
2693 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_BABBLEERR); | |
2694 | } else if (usbc_hcint.s.datatglerr) { | |
2695 | /* We'll retry the exact same transaction again */ | |
2696 | transaction->retries++; | |
2697 | } else if (usbc_hcint.s.nyet) { | |
2698 | /* | |
2699 | * NYET as a response is only allowed in three cases: as a | |
2700 | * response to a ping, as a response to a split transaction, and | |
2701 | * as a response to a bulk out. The ping case is handled by | |
2702 | * hardware, so we only have splits and bulk out | |
2703 | */ | |
2704 | if (!__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
2705 | transaction->retries = 0; | |
2706 | /* | |
2707 | * If there is more data to go then we need to try | |
2708 | * again. Otherwise this transaction is complete | |
2709 | */ | |
2710 | if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) | |
2711 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2712 | } else { | |
2713 | /* | |
2714 | * Split transactions retry the split complete 4 times | |
2715 | * then rewind to the start split and do the entire | |
2716 | * transactions again | |
2717 | */ | |
2718 | transaction->retries++; | |
2719 | if ((transaction->retries & 0x3) == 0) { | |
2720 | /* | |
2721 | * Rewind to the beginning of the transaction by | |
2722 | * anding off the split complete bit | |
2723 | */ | |
2724 | transaction->stage &= ~1; | |
2725 | pipe->split_sc_frame = -1; | |
2726 | } | |
2727 | } | |
2728 | } else if (usbc_hcint.s.ack) { | |
2729 | transaction->retries = 0; | |
2730 | /* | |
2731 | * The ACK bit can only be checked after the other error bits. | |
2732 | * This is because a multi packet transfer may succeed in a | |
2733 | * number of packets and then get a different response on the | |
2734 | * last packet. In this case both ACK and the last response bit | |
2735 | * will be set. If none of the other response bits is set, then | |
2736 | * the last packet must have been an ACK | |
2737 | * | |
2738 | * Since we got an ACK, we know we don't need to do a ping on | |
2739 | * this pipe | |
2740 | */ | |
2741 | pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_NEED_PING; | |
2742 | ||
2743 | switch (transaction->type) { | |
2744 | case CVMX_USB_TRANSFER_CONTROL: | |
2745 | switch (transaction->stage) { | |
2746 | case CVMX_USB_STAGE_NON_CONTROL: | |
2747 | case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE: | |
2748 | /* This should be impossible */ | |
2749 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR); | |
2750 | break; | |
2751 | case CVMX_USB_STAGE_SETUP: | |
2752 | pipe->pid_toggle = 1; | |
2753 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) | |
2754 | transaction->stage = CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE; | |
2755 | else { | |
2756 | union cvmx_usb_control_header *header = | |
2757 | cvmx_phys_to_ptr(transaction->control_header); | |
2758 | if (header->s.length) | |
2759 | transaction->stage = CVMX_USB_STAGE_DATA; | |
2760 | else | |
2761 | transaction->stage = CVMX_USB_STAGE_STATUS; | |
2762 | } | |
2763 | break; | |
2764 | case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE: | |
2765 | { | |
2766 | union cvmx_usb_control_header *header = | |
2767 | cvmx_phys_to_ptr(transaction->control_header); | |
2768 | if (header->s.length) | |
2769 | transaction->stage = CVMX_USB_STAGE_DATA; | |
2770 | else | |
2771 | transaction->stage = CVMX_USB_STAGE_STATUS; | |
2772 | } | |
2773 | break; | |
2774 | case CVMX_USB_STAGE_DATA: | |
2775 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
2776 | transaction->stage = CVMX_USB_STAGE_DATA_SPLIT_COMPLETE; | |
2777 | /* | |
2778 | * For setup OUT data that are splits, | |
2779 | * the hardware doesn't appear to count | |
2780 | * transferred data. Here we manually | |
2781 | * update the data transferred | |
2782 | */ | |
2783 | if (!usbc_hcchar.s.epdir) { | |
2784 | if (buffer_space_left < pipe->max_packet) | |
2785 | transaction->actual_bytes += buffer_space_left; | |
2786 | else | |
2787 | transaction->actual_bytes += pipe->max_packet; | |
2788 | } | |
2789 | } else if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) { | |
2790 | pipe->pid_toggle = 1; | |
2791 | transaction->stage = CVMX_USB_STAGE_STATUS; | |
2792 | } | |
2793 | break; | |
2794 | case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE: | |
2795 | if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) { | |
2796 | pipe->pid_toggle = 1; | |
2797 | transaction->stage = CVMX_USB_STAGE_STATUS; | |
2798 | } else { | |
2799 | transaction->stage = CVMX_USB_STAGE_DATA; | |
2800 | } | |
2801 | break; | |
2802 | case CVMX_USB_STAGE_STATUS: | |
2803 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) | |
2804 | transaction->stage = CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE; | |
2805 | else | |
2806 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2807 | break; | |
2808 | case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE: | |
2809 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2810 | break; | |
2811 | } | |
2812 | break; | |
2813 | case CVMX_USB_TRANSFER_BULK: | |
2814 | case CVMX_USB_TRANSFER_INTERRUPT: | |
2815 | /* | |
2816 | * The only time a bulk transfer isn't complete when it | |
2817 | * finishes with an ACK is during a split transaction. | |
2818 | * For splits we need to continue the transfer if more | |
2819 | * data is needed | |
2820 | */ | |
2821 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
2822 | if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL) | |
2823 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE; | |
2824 | else { | |
2825 | if (buffer_space_left && (bytes_in_last_packet == pipe->max_packet)) | |
2826 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL; | |
2827 | else { | |
2828 | if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT) | |
2829 | pipe->next_tx_frame += pipe->interval; | |
2830 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2831 | } | |
2832 | } | |
2833 | } else { | |
2834 | if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) && | |
2835 | (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) && | |
2836 | (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) && | |
2837 | (usbc_hcint.s.nak)) | |
2838 | pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING; | |
2839 | if (!buffer_space_left || (bytes_in_last_packet < pipe->max_packet)) { | |
2840 | if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT) | |
2841 | pipe->next_tx_frame += pipe->interval; | |
2842 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2843 | } | |
2844 | } | |
2845 | break; | |
2846 | case CVMX_USB_TRANSFER_ISOCHRONOUS: | |
2847 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { | |
2848 | /* | |
2849 | * ISOCHRONOUS OUT splits don't require a | |
2850 | * complete split stage. Instead they use a | |
2851 | * sequence of begin OUT splits to transfer the | |
2852 | * data 188 bytes at a time. Once the transfer | |
2853 | * is complete, the pipe sleeps until the next | |
2854 | * schedule interval | |
2855 | */ | |
2856 | if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) { | |
2857 | /* | |
2858 | * If no space left or this wasn't a max | |
2859 | * size packet then this transfer is | |
2860 | * complete. Otherwise start it again to | |
2861 | * send the next 188 bytes | |
2862 | */ | |
2863 | if (!buffer_space_left || (bytes_this_transfer < 188)) { | |
2864 | pipe->next_tx_frame += pipe->interval; | |
2865 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2866 | } | |
2867 | } else { | |
2868 | if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE) { | |
2869 | /* | |
2870 | * We are in the incoming data | |
2871 | * phase. Keep getting data | |
2872 | * until we run out of space or | |
2873 | * get a small packet | |
2874 | */ | |
2875 | if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) { | |
2876 | pipe->next_tx_frame += pipe->interval; | |
2877 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2878 | } | |
2879 | } else | |
2880 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE; | |
2881 | } | |
2882 | } else { | |
2883 | pipe->next_tx_frame += pipe->interval; | |
2884 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); | |
2885 | } | |
2886 | break; | |
2887 | } | |
2888 | } else if (usbc_hcint.s.nak) { | |
2889 | /* | |
2890 | * If this was a split then clear our split in progress marker. | |
2891 | */ | |
2892 | if (usb->active_split == transaction) | |
2893 | usb->active_split = NULL; | |
2894 | /* | |
2895 | * NAK as a response means the device couldn't accept the | |
2896 | * transaction, but it should be retried in the future. Rewind | |
2897 | * to the beginning of the transaction by anding off the split | |
2898 | * complete bit. Retry in the next interval | |
2899 | */ | |
2900 | transaction->retries = 0; | |
2901 | transaction->stage &= ~1; | |
2902 | pipe->next_tx_frame += pipe->interval; | |
2903 | if (pipe->next_tx_frame < usb->frame_number) | |
2904 | pipe->next_tx_frame = usb->frame_number + pipe->interval - | |
2905 | (usb->frame_number - pipe->next_tx_frame) % pipe->interval; | |
2906 | } else { | |
2907 | struct cvmx_usb_port_status port; | |
cb61c600 | 2908 | port = cvmx_usb_get_status(usb); |
6570b4a9 AK |
2909 | if (port.port_enabled) { |
2910 | /* We'll retry the exact same transaction again */ | |
2911 | transaction->retries++; | |
2912 | } else { | |
2913 | /* | |
2914 | * We get channel halted interrupts with no result bits | |
2915 | * sets when the cable is unplugged | |
2916 | */ | |
2917 | __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR); | |
2918 | } | |
2919 | } | |
2920 | return 0; | |
2921 | } | |
2922 | ||
393e2146 AK |
2923 | static void octeon_usb_port_callback(struct cvmx_usb_state *usb) |
2924 | { | |
2925 | struct octeon_hcd *priv = cvmx_usb_to_octeon(usb); | |
2926 | ||
2927 | spin_unlock(&priv->lock); | |
2928 | usb_hcd_poll_rh_status(octeon_to_hcd(priv)); | |
2929 | spin_lock(&priv->lock); | |
2930 | } | |
6570b4a9 AK |
2931 | |
2932 | /** | |
2933 | * Poll the USB block for status and call all needed callback | |
2934 | * handlers. This function is meant to be called in the interrupt | |
2935 | * handler for the USB controller. It can also be called | |
2936 | * periodically in a loop for non-interrupt based operation. | |
2937 | * | |
cb61c600 | 2938 | * @usb: USB device state populated by cvmx_usb_initialize(). |
6570b4a9 AK |
2939 | * |
2940 | * Returns: 0 or a negative error code. | |
2941 | */ | |
cb61c600 | 2942 | static int cvmx_usb_poll(struct cvmx_usb_state *usb) |
6570b4a9 AK |
2943 | { |
2944 | union cvmx_usbcx_hfnum usbc_hfnum; | |
2945 | union cvmx_usbcx_gintsts usbc_gintsts; | |
6570b4a9 AK |
2946 | |
2947 | CVMX_PREFETCH(usb, 0); | |
2948 | CVMX_PREFETCH(usb, 1*128); | |
2949 | CVMX_PREFETCH(usb, 2*128); | |
2950 | CVMX_PREFETCH(usb, 3*128); | |
2951 | CVMX_PREFETCH(usb, 4*128); | |
2952 | ||
2953 | /* Update the frame counter */ | |
2954 | usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index)); | |
2955 | if ((usb->frame_number&0x3fff) > usbc_hfnum.s.frnum) | |
2956 | usb->frame_number += 0x4000; | |
2957 | usb->frame_number &= ~0x3fffull; | |
2958 | usb->frame_number |= usbc_hfnum.s.frnum; | |
2959 | ||
2960 | /* Read the pending interrupts */ | |
2961 | usbc_gintsts.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTSTS(usb->index)); | |
2962 | ||
2963 | /* Clear the interrupts now that we know about them */ | |
2964 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTSTS(usb->index), usbc_gintsts.u32); | |
2965 | ||
2966 | if (usbc_gintsts.s.rxflvl) { | |
2967 | /* | |
2968 | * RxFIFO Non-Empty (RxFLvl) | |
2969 | * Indicates that there is at least one packet pending to be | |
2970 | * read from the RxFIFO. | |
2971 | * | |
2972 | * In DMA mode this is handled by hardware | |
2973 | */ | |
2974 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) | |
2975 | __cvmx_usb_poll_rx_fifo(usb); | |
2976 | } | |
2977 | if (usbc_gintsts.s.ptxfemp || usbc_gintsts.s.nptxfemp) { | |
2978 | /* Fill the Tx FIFOs when not in DMA mode */ | |
2979 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) | |
2980 | __cvmx_usb_poll_tx_fifo(usb); | |
2981 | } | |
2982 | if (usbc_gintsts.s.disconnint || usbc_gintsts.s.prtint) { | |
2983 | union cvmx_usbcx_hprt usbc_hprt; | |
2984 | /* | |
2985 | * Disconnect Detected Interrupt (DisconnInt) | |
2986 | * Asserted when a device disconnect is detected. | |
2987 | * | |
2988 | * Host Port Interrupt (PrtInt) | |
2989 | * The core sets this bit to indicate a change in port status of | |
2990 | * one of the O2P USB core ports in Host mode. The application | |
2991 | * must read the Host Port Control and Status (HPRT) register to | |
2992 | * determine the exact event that caused this interrupt. The | |
2993 | * application must clear the appropriate status bit in the Host | |
2994 | * Port Control and Status register to clear this bit. | |
2995 | * | |
2996 | * Call the user's port callback | |
2997 | */ | |
393e2146 | 2998 | octeon_usb_port_callback(usb); |
6570b4a9 AK |
2999 | /* Clear the port change bits */ |
3000 | usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); | |
3001 | usbc_hprt.s.prtena = 0; | |
3002 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPRT(usb->index), usbc_hprt.u32); | |
3003 | } | |
3004 | if (usbc_gintsts.s.hchint) { | |
3005 | /* | |
3006 | * Host Channels Interrupt (HChInt) | |
3007 | * The core sets this bit to indicate that an interrupt is | |
3008 | * pending on one of the channels of the core (in Host mode). | |
3009 | * The application must read the Host All Channels Interrupt | |
3010 | * (HAINT) register to determine the exact number of the channel | |
3011 | * on which the interrupt occurred, and then read the | |
3012 | * corresponding Host Channel-n Interrupt (HCINTn) register to | |
3013 | * determine the exact cause of the interrupt. The application | |
3014 | * must clear the appropriate status bit in the HCINTn register | |
3015 | * to clear this bit. | |
3016 | */ | |
3017 | union cvmx_usbcx_haint usbc_haint; | |
3018 | usbc_haint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINT(usb->index)); | |
3019 | while (usbc_haint.u32) { | |
3020 | int channel; | |
3021 | ||
3022 | channel = __fls(usbc_haint.u32); | |
3023 | __cvmx_usb_poll_channel(usb, channel); | |
3024 | usbc_haint.u32 ^= 1<<channel; | |
3025 | } | |
3026 | } | |
3027 | ||
3028 | __cvmx_usb_schedule(usb, usbc_gintsts.s.sof); | |
3029 | ||
3030 | return 0; | |
3031 | } | |
3032 | ||
b164935b AK |
3033 | /* convert between an HCD pointer and the corresponding struct octeon_hcd */ |
3034 | static inline struct octeon_hcd *hcd_to_octeon(struct usb_hcd *hcd) | |
3035 | { | |
3036 | return (struct octeon_hcd *)(hcd->hcd_priv); | |
3037 | } | |
3038 | ||
b164935b AK |
3039 | static irqreturn_t octeon_usb_irq(struct usb_hcd *hcd) |
3040 | { | |
771378bb AK |
3041 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
3042 | unsigned long flags; | |
71e06db3 | 3043 | |
771378bb AK |
3044 | spin_lock_irqsave(&priv->lock, flags); |
3045 | cvmx_usb_poll(&priv->usb); | |
3046 | spin_unlock_irqrestore(&priv->lock, flags); | |
3047 | return IRQ_HANDLED; | |
b164935b AK |
3048 | } |
3049 | ||
b164935b AK |
3050 | static int octeon_usb_start(struct usb_hcd *hcd) |
3051 | { | |
771378bb | 3052 | hcd->state = HC_STATE_RUNNING; |
771378bb | 3053 | return 0; |
b164935b AK |
3054 | } |
3055 | ||
3056 | static void octeon_usb_stop(struct usb_hcd *hcd) | |
3057 | { | |
771378bb | 3058 | hcd->state = HC_STATE_HALT; |
b164935b AK |
3059 | } |
3060 | ||
3061 | static int octeon_usb_get_frame_number(struct usb_hcd *hcd) | |
3062 | { | |
771378bb | 3063 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
71e06db3 | 3064 | |
771378bb | 3065 | return cvmx_usb_get_frame_number(&priv->usb); |
b164935b AK |
3066 | } |
3067 | ||
b164935b | 3068 | static int octeon_usb_urb_enqueue(struct usb_hcd *hcd, |
771378bb AK |
3069 | struct urb *urb, |
3070 | gfp_t mem_flags) | |
b164935b | 3071 | { |
771378bb | 3072 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
71e06db3 | 3073 | struct device *dev = hcd->self.controller; |
3e1674c0 | 3074 | struct cvmx_usb_transaction *transaction = NULL; |
60f81507 | 3075 | struct cvmx_usb_pipe *pipe; |
771378bb | 3076 | unsigned long flags; |
6e0e1b00 | 3077 | struct cvmx_usb_iso_packet *iso_packet; |
771378bb AK |
3078 | struct usb_host_endpoint *ep = urb->ep; |
3079 | ||
771378bb AK |
3080 | urb->status = 0; |
3081 | INIT_LIST_HEAD(&urb->urb_list); /* not enqueued on dequeue_list */ | |
3082 | spin_lock_irqsave(&priv->lock, flags); | |
3083 | ||
3084 | if (!ep->hcpriv) { | |
394d4e08 | 3085 | enum cvmx_usb_transfer transfer_type; |
4918072e | 3086 | enum cvmx_usb_speed speed; |
771378bb AK |
3087 | int split_device = 0; |
3088 | int split_port = 0; | |
3089 | switch (usb_pipetype(urb->pipe)) { | |
3090 | case PIPE_ISOCHRONOUS: | |
3091 | transfer_type = CVMX_USB_TRANSFER_ISOCHRONOUS; | |
3092 | break; | |
3093 | case PIPE_INTERRUPT: | |
3094 | transfer_type = CVMX_USB_TRANSFER_INTERRUPT; | |
3095 | break; | |
3096 | case PIPE_CONTROL: | |
3097 | transfer_type = CVMX_USB_TRANSFER_CONTROL; | |
3098 | break; | |
3099 | default: | |
3100 | transfer_type = CVMX_USB_TRANSFER_BULK; | |
3101 | break; | |
3102 | } | |
3103 | switch (urb->dev->speed) { | |
3104 | case USB_SPEED_LOW: | |
3105 | speed = CVMX_USB_SPEED_LOW; | |
3106 | break; | |
3107 | case USB_SPEED_FULL: | |
3108 | speed = CVMX_USB_SPEED_FULL; | |
3109 | break; | |
3110 | default: | |
3111 | speed = CVMX_USB_SPEED_HIGH; | |
3112 | break; | |
3113 | } | |
87e7e57a AK |
3114 | /* |
3115 | * For slow devices on high speed ports we need to find the hub | |
3116 | * that does the speed translation so we know where to send the | |
3117 | * split transactions. | |
3118 | */ | |
771378bb | 3119 | if (speed != CVMX_USB_SPEED_HIGH) { |
87e7e57a AK |
3120 | /* |
3121 | * Start at this device and work our way up the usb | |
3122 | * tree. | |
3123 | */ | |
771378bb AK |
3124 | struct usb_device *dev = urb->dev; |
3125 | while (dev->parent) { | |
87e7e57a AK |
3126 | /* |
3127 | * If our parent is high speed then he'll | |
3128 | * receive the splits. | |
3129 | */ | |
771378bb AK |
3130 | if (dev->parent->speed == USB_SPEED_HIGH) { |
3131 | split_device = dev->parent->devnum; | |
3132 | split_port = dev->portnum; | |
3133 | break; | |
3134 | } | |
87e7e57a AK |
3135 | /* |
3136 | * Move up the tree one level. If we make it all | |
3137 | * the way up the tree, then the port must not | |
3138 | * be in high speed mode and we don't need a | |
3139 | * split. | |
3140 | */ | |
771378bb AK |
3141 | dev = dev->parent; |
3142 | } | |
3143 | } | |
60f81507 AK |
3144 | pipe = cvmx_usb_open_pipe(&priv->usb, usb_pipedevice(urb->pipe), |
3145 | usb_pipeendpoint(urb->pipe), speed, | |
3146 | le16_to_cpu(ep->desc.wMaxPacketSize) & 0x7ff, | |
3147 | transfer_type, | |
3148 | usb_pipein(urb->pipe) ? | |
3149 | CVMX_USB_DIRECTION_IN : | |
3150 | CVMX_USB_DIRECTION_OUT, | |
3151 | urb->interval, | |
3152 | (le16_to_cpu(ep->desc.wMaxPacketSize) >> 11) & 0x3, | |
3153 | split_device, split_port); | |
3154 | if (!pipe) { | |
771378bb | 3155 | spin_unlock_irqrestore(&priv->lock, flags); |
71e06db3 | 3156 | dev_dbg(dev, "Failed to create pipe\n"); |
771378bb AK |
3157 | return -ENOMEM; |
3158 | } | |
60f81507 | 3159 | ep->hcpriv = pipe; |
c7609eac | 3160 | } else { |
60f81507 | 3161 | pipe = ep->hcpriv; |
c7609eac | 3162 | } |
771378bb AK |
3163 | |
3164 | switch (usb_pipetype(urb->pipe)) { | |
3165 | case PIPE_ISOCHRONOUS: | |
71e06db3 AK |
3166 | dev_dbg(dev, "Submit isochronous to %d.%d\n", |
3167 | usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe)); | |
87e7e57a AK |
3168 | /* |
3169 | * Allocate a structure to use for our private list of | |
3170 | * isochronous packets. | |
3171 | */ | |
6e0e1b00 AK |
3172 | iso_packet = kmalloc(urb->number_of_packets * |
3173 | sizeof(struct cvmx_usb_iso_packet), | |
3174 | GFP_ATOMIC); | |
771378bb AK |
3175 | if (iso_packet) { |
3176 | int i; | |
3177 | /* Fill the list with the data from the URB */ | |
3178 | for (i = 0; i < urb->number_of_packets; i++) { | |
3179 | iso_packet[i].offset = urb->iso_frame_desc[i].offset; | |
3180 | iso_packet[i].length = urb->iso_frame_desc[i].length; | |
3181 | iso_packet[i].status = CVMX_USB_COMPLETE_ERROR; | |
3182 | } | |
87e7e57a AK |
3183 | /* |
3184 | * Store a pointer to the list in the URB setup_packet | |
3185 | * field. We know this currently isn't being used and | |
3186 | * this saves us a bunch of logic. | |
3187 | */ | |
771378bb | 3188 | urb->setup_packet = (char *)iso_packet; |
3e1674c0 AK |
3189 | transaction = cvmx_usb_submit_isochronous(&priv->usb, |
3190 | pipe, urb); | |
87e7e57a AK |
3191 | /* |
3192 | * If submit failed we need to free our private packet | |
3193 | * list. | |
3194 | */ | |
3e1674c0 | 3195 | if (!transaction) { |
771378bb AK |
3196 | urb->setup_packet = NULL; |
3197 | kfree(iso_packet); | |
3198 | } | |
3199 | } | |
3200 | break; | |
3201 | case PIPE_INTERRUPT: | |
71e06db3 AK |
3202 | dev_dbg(dev, "Submit interrupt to %d.%d\n", |
3203 | usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe)); | |
3e1674c0 | 3204 | transaction = cvmx_usb_submit_interrupt(&priv->usb, pipe, urb); |
771378bb AK |
3205 | break; |
3206 | case PIPE_CONTROL: | |
71e06db3 AK |
3207 | dev_dbg(dev, "Submit control to %d.%d\n", |
3208 | usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe)); | |
3e1674c0 | 3209 | transaction = cvmx_usb_submit_control(&priv->usb, pipe, urb); |
771378bb AK |
3210 | break; |
3211 | case PIPE_BULK: | |
71e06db3 AK |
3212 | dev_dbg(dev, "Submit bulk to %d.%d\n", |
3213 | usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe)); | |
3e1674c0 | 3214 | transaction = cvmx_usb_submit_bulk(&priv->usb, pipe, urb); |
771378bb AK |
3215 | break; |
3216 | } | |
3e1674c0 | 3217 | if (!transaction) { |
771378bb | 3218 | spin_unlock_irqrestore(&priv->lock, flags); |
71e06db3 | 3219 | dev_dbg(dev, "Failed to submit\n"); |
771378bb AK |
3220 | return -ENOMEM; |
3221 | } | |
3e1674c0 | 3222 | urb->hcpriv = transaction; |
771378bb AK |
3223 | spin_unlock_irqrestore(&priv->lock, flags); |
3224 | return 0; | |
b164935b AK |
3225 | } |
3226 | ||
3227 | static void octeon_usb_urb_dequeue_work(unsigned long arg) | |
3228 | { | |
771378bb AK |
3229 | unsigned long flags; |
3230 | struct octeon_hcd *priv = (struct octeon_hcd *)arg; | |
3231 | ||
3232 | spin_lock_irqsave(&priv->lock, flags); | |
3233 | ||
3234 | while (!list_empty(&priv->dequeue_list)) { | |
771378bb AK |
3235 | struct urb *urb = container_of(priv->dequeue_list.next, struct urb, urb_list); |
3236 | list_del(&urb->urb_list); | |
3237 | /* not enqueued on dequeue_list */ | |
3238 | INIT_LIST_HEAD(&urb->urb_list); | |
3e1674c0 | 3239 | cvmx_usb_cancel(&priv->usb, urb->ep->hcpriv, urb->hcpriv); |
771378bb AK |
3240 | } |
3241 | ||
3242 | spin_unlock_irqrestore(&priv->lock, flags); | |
b164935b AK |
3243 | } |
3244 | ||
3245 | static int octeon_usb_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
3246 | { | |
771378bb AK |
3247 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
3248 | unsigned long flags; | |
b164935b | 3249 | |
771378bb AK |
3250 | if (!urb->dev) |
3251 | return -EINVAL; | |
b164935b | 3252 | |
771378bb | 3253 | spin_lock_irqsave(&priv->lock, flags); |
b164935b | 3254 | |
771378bb AK |
3255 | urb->status = status; |
3256 | list_add_tail(&urb->urb_list, &priv->dequeue_list); | |
b164935b | 3257 | |
771378bb | 3258 | spin_unlock_irqrestore(&priv->lock, flags); |
b164935b | 3259 | |
771378bb | 3260 | tasklet_schedule(&priv->dequeue_tasklet); |
b164935b | 3261 | |
771378bb | 3262 | return 0; |
b164935b AK |
3263 | } |
3264 | ||
3265 | static void octeon_usb_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep) | |
3266 | { | |
71e06db3 AK |
3267 | struct device *dev = hcd->self.controller; |
3268 | ||
771378bb AK |
3269 | if (ep->hcpriv) { |
3270 | struct octeon_hcd *priv = hcd_to_octeon(hcd); | |
60f81507 | 3271 | struct cvmx_usb_pipe *pipe = ep->hcpriv; |
771378bb AK |
3272 | unsigned long flags; |
3273 | spin_lock_irqsave(&priv->lock, flags); | |
60f81507 AK |
3274 | cvmx_usb_cancel_all(&priv->usb, pipe); |
3275 | if (cvmx_usb_close_pipe(&priv->usb, pipe)) | |
3276 | dev_dbg(dev, "Closing pipe %p failed\n", pipe); | |
771378bb AK |
3277 | spin_unlock_irqrestore(&priv->lock, flags); |
3278 | ep->hcpriv = NULL; | |
3279 | } | |
b164935b AK |
3280 | } |
3281 | ||
3282 | static int octeon_usb_hub_status_data(struct usb_hcd *hcd, char *buf) | |
3283 | { | |
771378bb | 3284 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
51a19621 | 3285 | struct cvmx_usb_port_status port_status; |
771378bb | 3286 | unsigned long flags; |
b164935b | 3287 | |
771378bb AK |
3288 | spin_lock_irqsave(&priv->lock, flags); |
3289 | port_status = cvmx_usb_get_status(&priv->usb); | |
3290 | spin_unlock_irqrestore(&priv->lock, flags); | |
3291 | buf[0] = 0; | |
3292 | buf[0] = port_status.connect_change << 1; | |
b164935b | 3293 | |
771378bb | 3294 | return (buf[0] != 0); |
b164935b AK |
3295 | } |
3296 | ||
3297 | static int octeon_usb_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength) | |
3298 | { | |
771378bb | 3299 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
71e06db3 | 3300 | struct device *dev = hcd->self.controller; |
51a19621 | 3301 | struct cvmx_usb_port_status usb_port_status; |
771378bb AK |
3302 | int port_status; |
3303 | struct usb_hub_descriptor *desc; | |
3304 | unsigned long flags; | |
3305 | ||
3306 | switch (typeReq) { | |
3307 | case ClearHubFeature: | |
71e06db3 | 3308 | dev_dbg(dev, "ClearHubFeature\n"); |
771378bb AK |
3309 | switch (wValue) { |
3310 | case C_HUB_LOCAL_POWER: | |
3311 | case C_HUB_OVER_CURRENT: | |
3312 | /* Nothing required here */ | |
3313 | break; | |
3314 | default: | |
3315 | return -EINVAL; | |
3316 | } | |
3317 | break; | |
3318 | case ClearPortFeature: | |
71e06db3 | 3319 | dev_dbg(dev, "ClearPortFeature\n"); |
771378bb | 3320 | if (wIndex != 1) { |
71e06db3 | 3321 | dev_dbg(dev, " INVALID\n"); |
771378bb AK |
3322 | return -EINVAL; |
3323 | } | |
3324 | ||
3325 | switch (wValue) { | |
3326 | case USB_PORT_FEAT_ENABLE: | |
71e06db3 | 3327 | dev_dbg(dev, " ENABLE\n"); |
771378bb AK |
3328 | spin_lock_irqsave(&priv->lock, flags); |
3329 | cvmx_usb_disable(&priv->usb); | |
3330 | spin_unlock_irqrestore(&priv->lock, flags); | |
3331 | break; | |
3332 | case USB_PORT_FEAT_SUSPEND: | |
71e06db3 | 3333 | dev_dbg(dev, " SUSPEND\n"); |
771378bb AK |
3334 | /* Not supported on Octeon */ |
3335 | break; | |
3336 | case USB_PORT_FEAT_POWER: | |
71e06db3 | 3337 | dev_dbg(dev, " POWER\n"); |
771378bb AK |
3338 | /* Not supported on Octeon */ |
3339 | break; | |
3340 | case USB_PORT_FEAT_INDICATOR: | |
71e06db3 | 3341 | dev_dbg(dev, " INDICATOR\n"); |
771378bb AK |
3342 | /* Port inidicator not supported */ |
3343 | break; | |
3344 | case USB_PORT_FEAT_C_CONNECTION: | |
71e06db3 | 3345 | dev_dbg(dev, " C_CONNECTION\n"); |
771378bb AK |
3346 | /* Clears drivers internal connect status change flag */ |
3347 | spin_lock_irqsave(&priv->lock, flags); | |
29a202fa | 3348 | priv->usb.port_status = cvmx_usb_get_status(&priv->usb); |
771378bb AK |
3349 | spin_unlock_irqrestore(&priv->lock, flags); |
3350 | break; | |
3351 | case USB_PORT_FEAT_C_RESET: | |
71e06db3 | 3352 | dev_dbg(dev, " C_RESET\n"); |
87e7e57a AK |
3353 | /* |
3354 | * Clears the driver's internal Port Reset Change flag. | |
3355 | */ | |
771378bb | 3356 | spin_lock_irqsave(&priv->lock, flags); |
29a202fa | 3357 | priv->usb.port_status = cvmx_usb_get_status(&priv->usb); |
771378bb AK |
3358 | spin_unlock_irqrestore(&priv->lock, flags); |
3359 | break; | |
3360 | case USB_PORT_FEAT_C_ENABLE: | |
71e06db3 | 3361 | dev_dbg(dev, " C_ENABLE\n"); |
87e7e57a AK |
3362 | /* |
3363 | * Clears the driver's internal Port Enable/Disable | |
3364 | * Change flag. | |
3365 | */ | |
771378bb | 3366 | spin_lock_irqsave(&priv->lock, flags); |
29a202fa | 3367 | priv->usb.port_status = cvmx_usb_get_status(&priv->usb); |
771378bb AK |
3368 | spin_unlock_irqrestore(&priv->lock, flags); |
3369 | break; | |
3370 | case USB_PORT_FEAT_C_SUSPEND: | |
71e06db3 | 3371 | dev_dbg(dev, " C_SUSPEND\n"); |
87e7e57a AK |
3372 | /* |
3373 | * Clears the driver's internal Port Suspend Change | |
3374 | * flag, which is set when resume signaling on the host | |
3375 | * port is complete. | |
3376 | */ | |
771378bb AK |
3377 | break; |
3378 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
71e06db3 | 3379 | dev_dbg(dev, " C_OVER_CURRENT\n"); |
771378bb AK |
3380 | /* Clears the driver's overcurrent Change flag */ |
3381 | spin_lock_irqsave(&priv->lock, flags); | |
29a202fa | 3382 | priv->usb.port_status = cvmx_usb_get_status(&priv->usb); |
771378bb AK |
3383 | spin_unlock_irqrestore(&priv->lock, flags); |
3384 | break; | |
3385 | default: | |
71e06db3 | 3386 | dev_dbg(dev, " UNKNOWN\n"); |
771378bb AK |
3387 | return -EINVAL; |
3388 | } | |
771378bb AK |
3389 | break; |
3390 | case GetHubDescriptor: | |
71e06db3 | 3391 | dev_dbg(dev, "GetHubDescriptor\n"); |
771378bb AK |
3392 | desc = (struct usb_hub_descriptor *)buf; |
3393 | desc->bDescLength = 9; | |
3394 | desc->bDescriptorType = 0x29; | |
3395 | desc->bNbrPorts = 1; | |
3396 | desc->wHubCharacteristics = 0x08; | |
3397 | desc->bPwrOn2PwrGood = 1; | |
3398 | desc->bHubContrCurrent = 0; | |
3399 | desc->u.hs.DeviceRemovable[0] = 0; | |
3400 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
3401 | break; | |
3402 | case GetHubStatus: | |
71e06db3 | 3403 | dev_dbg(dev, "GetHubStatus\n"); |
771378bb AK |
3404 | *(__le32 *) buf = 0; |
3405 | break; | |
3406 | case GetPortStatus: | |
71e06db3 | 3407 | dev_dbg(dev, "GetPortStatus\n"); |
771378bb | 3408 | if (wIndex != 1) { |
71e06db3 | 3409 | dev_dbg(dev, " INVALID\n"); |
771378bb AK |
3410 | return -EINVAL; |
3411 | } | |
3412 | ||
3413 | spin_lock_irqsave(&priv->lock, flags); | |
3414 | usb_port_status = cvmx_usb_get_status(&priv->usb); | |
3415 | spin_unlock_irqrestore(&priv->lock, flags); | |
3416 | port_status = 0; | |
3417 | ||
3418 | if (usb_port_status.connect_change) { | |
3419 | port_status |= (1 << USB_PORT_FEAT_C_CONNECTION); | |
71e06db3 | 3420 | dev_dbg(dev, " C_CONNECTION\n"); |
771378bb AK |
3421 | } |
3422 | ||
3423 | if (usb_port_status.port_enabled) { | |
3424 | port_status |= (1 << USB_PORT_FEAT_C_ENABLE); | |
71e06db3 | 3425 | dev_dbg(dev, " C_ENABLE\n"); |
771378bb AK |
3426 | } |
3427 | ||
3428 | if (usb_port_status.connected) { | |
3429 | port_status |= (1 << USB_PORT_FEAT_CONNECTION); | |
71e06db3 | 3430 | dev_dbg(dev, " CONNECTION\n"); |
771378bb AK |
3431 | } |
3432 | ||
3433 | if (usb_port_status.port_enabled) { | |
3434 | port_status |= (1 << USB_PORT_FEAT_ENABLE); | |
71e06db3 | 3435 | dev_dbg(dev, " ENABLE\n"); |
771378bb AK |
3436 | } |
3437 | ||
3438 | if (usb_port_status.port_over_current) { | |
3439 | port_status |= (1 << USB_PORT_FEAT_OVER_CURRENT); | |
71e06db3 | 3440 | dev_dbg(dev, " OVER_CURRENT\n"); |
771378bb AK |
3441 | } |
3442 | ||
3443 | if (usb_port_status.port_powered) { | |
3444 | port_status |= (1 << USB_PORT_FEAT_POWER); | |
71e06db3 | 3445 | dev_dbg(dev, " POWER\n"); |
771378bb AK |
3446 | } |
3447 | ||
3448 | if (usb_port_status.port_speed == CVMX_USB_SPEED_HIGH) { | |
3449 | port_status |= USB_PORT_STAT_HIGH_SPEED; | |
71e06db3 | 3450 | dev_dbg(dev, " HIGHSPEED\n"); |
771378bb AK |
3451 | } else if (usb_port_status.port_speed == CVMX_USB_SPEED_LOW) { |
3452 | port_status |= (1 << USB_PORT_FEAT_LOWSPEED); | |
71e06db3 | 3453 | dev_dbg(dev, " LOWSPEED\n"); |
771378bb AK |
3454 | } |
3455 | ||
3456 | *((__le32 *) buf) = cpu_to_le32(port_status); | |
771378bb AK |
3457 | break; |
3458 | case SetHubFeature: | |
71e06db3 | 3459 | dev_dbg(dev, "SetHubFeature\n"); |
771378bb AK |
3460 | /* No HUB features supported */ |
3461 | break; | |
3462 | case SetPortFeature: | |
71e06db3 | 3463 | dev_dbg(dev, "SetPortFeature\n"); |
771378bb | 3464 | if (wIndex != 1) { |
71e06db3 | 3465 | dev_dbg(dev, " INVALID\n"); |
771378bb AK |
3466 | return -EINVAL; |
3467 | } | |
3468 | ||
3469 | switch (wValue) { | |
3470 | case USB_PORT_FEAT_SUSPEND: | |
71e06db3 | 3471 | dev_dbg(dev, " SUSPEND\n"); |
771378bb AK |
3472 | return -EINVAL; |
3473 | case USB_PORT_FEAT_POWER: | |
71e06db3 | 3474 | dev_dbg(dev, " POWER\n"); |
771378bb AK |
3475 | return -EINVAL; |
3476 | case USB_PORT_FEAT_RESET: | |
71e06db3 | 3477 | dev_dbg(dev, " RESET\n"); |
771378bb AK |
3478 | spin_lock_irqsave(&priv->lock, flags); |
3479 | cvmx_usb_disable(&priv->usb); | |
3480 | if (cvmx_usb_enable(&priv->usb)) | |
71e06db3 | 3481 | dev_dbg(dev, "Failed to enable the port\n"); |
771378bb AK |
3482 | spin_unlock_irqrestore(&priv->lock, flags); |
3483 | return 0; | |
3484 | case USB_PORT_FEAT_INDICATOR: | |
71e06db3 | 3485 | dev_dbg(dev, " INDICATOR\n"); |
771378bb AK |
3486 | /* Not supported */ |
3487 | break; | |
3488 | default: | |
71e06db3 | 3489 | dev_dbg(dev, " UNKNOWN\n"); |
771378bb AK |
3490 | return -EINVAL; |
3491 | } | |
3492 | break; | |
3493 | default: | |
71e06db3 | 3494 | dev_dbg(dev, "Unknown root hub request\n"); |
771378bb AK |
3495 | return -EINVAL; |
3496 | } | |
3497 | return 0; | |
b164935b AK |
3498 | } |
3499 | ||
3500 | ||
3501 | static const struct hc_driver octeon_hc_driver = { | |
771378bb AK |
3502 | .description = "Octeon USB", |
3503 | .product_desc = "Octeon Host Controller", | |
3504 | .hcd_priv_size = sizeof(struct octeon_hcd), | |
3505 | .irq = octeon_usb_irq, | |
3506 | .flags = HCD_MEMORY | HCD_USB2, | |
3507 | .start = octeon_usb_start, | |
3508 | .stop = octeon_usb_stop, | |
3509 | .urb_enqueue = octeon_usb_urb_enqueue, | |
3510 | .urb_dequeue = octeon_usb_urb_dequeue, | |
3511 | .endpoint_disable = octeon_usb_endpoint_disable, | |
3512 | .get_frame_number = octeon_usb_get_frame_number, | |
3513 | .hub_status_data = octeon_usb_hub_status_data, | |
3514 | .hub_control = octeon_usb_hub_control, | |
b164935b AK |
3515 | }; |
3516 | ||
3517 | ||
3518 | static int octeon_usb_driver_probe(struct device *dev) | |
3519 | { | |
771378bb AK |
3520 | int status; |
3521 | int usb_num = to_platform_device(dev)->id; | |
3522 | int irq = platform_get_irq(to_platform_device(dev), 0); | |
3523 | struct octeon_hcd *priv; | |
3524 | struct usb_hcd *hcd; | |
3525 | unsigned long flags; | |
3526 | ||
87e7e57a AK |
3527 | /* |
3528 | * Set the DMA mask to 64bits so we get buffers already translated for | |
3529 | * DMA. | |
3530 | */ | |
771378bb AK |
3531 | dev->coherent_dma_mask = ~0; |
3532 | dev->dma_mask = &dev->coherent_dma_mask; | |
3533 | ||
3534 | hcd = usb_create_hcd(&octeon_hc_driver, dev, dev_name(dev)); | |
3535 | if (!hcd) { | |
71e06db3 | 3536 | dev_dbg(dev, "Failed to allocate memory for HCD\n"); |
771378bb AK |
3537 | return -1; |
3538 | } | |
3539 | hcd->uses_new_polling = 1; | |
3540 | priv = (struct octeon_hcd *)hcd->hcd_priv; | |
3541 | ||
3542 | spin_lock_init(&priv->lock); | |
3543 | ||
3544 | tasklet_init(&priv->dequeue_tasklet, octeon_usb_urb_dequeue_work, (unsigned long)priv); | |
3545 | INIT_LIST_HEAD(&priv->dequeue_list); | |
3546 | ||
9be317e6 | 3547 | status = cvmx_usb_initialize(&priv->usb, usb_num); |
771378bb | 3548 | if (status) { |
71e06db3 | 3549 | dev_dbg(dev, "USB initialization failed with %d\n", status); |
771378bb AK |
3550 | kfree(hcd); |
3551 | return -1; | |
3552 | } | |
3553 | ||
3554 | /* This delay is needed for CN3010, but I don't know why... */ | |
3555 | mdelay(10); | |
3556 | ||
3557 | spin_lock_irqsave(&priv->lock, flags); | |
3558 | cvmx_usb_poll(&priv->usb); | |
3559 | spin_unlock_irqrestore(&priv->lock, flags); | |
3560 | ||
3561 | status = usb_add_hcd(hcd, irq, IRQF_SHARED); | |
3562 | if (status) { | |
71e06db3 | 3563 | dev_dbg(dev, "USB add HCD failed with %d\n", status); |
771378bb AK |
3564 | kfree(hcd); |
3565 | return -1; | |
3566 | } | |
3567 | ||
d935217d | 3568 | dev_dbg(dev, "Registered HCD for port %d on irq %d\n", usb_num, irq); |
771378bb AK |
3569 | |
3570 | return 0; | |
b164935b AK |
3571 | } |
3572 | ||
3573 | static int octeon_usb_driver_remove(struct device *dev) | |
3574 | { | |
771378bb AK |
3575 | int status; |
3576 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
3577 | struct octeon_hcd *priv = hcd_to_octeon(hcd); | |
3578 | unsigned long flags; | |
b164935b | 3579 | |
771378bb AK |
3580 | usb_remove_hcd(hcd); |
3581 | tasklet_kill(&priv->dequeue_tasklet); | |
3582 | spin_lock_irqsave(&priv->lock, flags); | |
3583 | status = cvmx_usb_shutdown(&priv->usb); | |
3584 | spin_unlock_irqrestore(&priv->lock, flags); | |
3585 | if (status) | |
71e06db3 | 3586 | dev_dbg(dev, "USB shutdown failed with %d\n", status); |
b164935b | 3587 | |
771378bb | 3588 | kfree(hcd); |
b164935b | 3589 | |
771378bb | 3590 | return 0; |
b164935b AK |
3591 | } |
3592 | ||
3593 | static struct device_driver octeon_usb_driver = { | |
771378bb AK |
3594 | .name = "OcteonUSB", |
3595 | .bus = &platform_bus_type, | |
3596 | .probe = octeon_usb_driver_probe, | |
3597 | .remove = octeon_usb_driver_remove, | |
b164935b AK |
3598 | }; |
3599 | ||
3600 | ||
3601 | #define MAX_USB_PORTS 10 | |
f5ed3a38 | 3602 | static struct platform_device *pdev_glob[MAX_USB_PORTS]; |
b164935b AK |
3603 | static int octeon_usb_registered; |
3604 | static int __init octeon_usb_module_init(void) | |
3605 | { | |
771378bb AK |
3606 | int num_devices = cvmx_usb_get_num_ports(); |
3607 | int device; | |
b164935b | 3608 | |
771378bb AK |
3609 | if (usb_disabled() || num_devices == 0) |
3610 | return -ENODEV; | |
b164935b | 3611 | |
71e06db3 | 3612 | if (driver_register(&octeon_usb_driver)) |
771378bb | 3613 | return -ENOMEM; |
71e06db3 | 3614 | |
771378bb | 3615 | octeon_usb_registered = 1; |
b164935b AK |
3616 | |
3617 | /* | |
3618 | * Only cn52XX and cn56XX have DWC_OTG USB hardware and the | |
3619 | * IOB priority registers. Under heavy network load USB | |
3620 | * hardware can be starved by the IOB causing a crash. Give | |
3621 | * it a priority boost if it has been waiting more than 400 | |
3622 | * cycles to avoid this situation. | |
3623 | * | |
3624 | * Testing indicates that a cnt_val of 8192 is not sufficient, | |
3625 | * but no failures are seen with 4096. We choose a value of | |
3626 | * 400 to give a safety factor of 10. | |
3627 | */ | |
3628 | if (OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN56XX)) { | |
3629 | union cvmx_iob_n2c_l2c_pri_cnt pri_cnt; | |
3630 | ||
3631 | pri_cnt.u64 = 0; | |
3632 | pri_cnt.s.cnt_enb = 1; | |
3633 | pri_cnt.s.cnt_val = 400; | |
3634 | cvmx_write_csr(CVMX_IOB_N2C_L2C_PRI_CNT, pri_cnt.u64); | |
3635 | } | |
3636 | ||
771378bb AK |
3637 | for (device = 0; device < num_devices; device++) { |
3638 | struct resource irq_resource; | |
3639 | struct platform_device *pdev; | |
3640 | memset(&irq_resource, 0, sizeof(irq_resource)); | |
3641 | irq_resource.start = (device == 0) ? OCTEON_IRQ_USB0 : OCTEON_IRQ_USB1; | |
3642 | irq_resource.end = irq_resource.start; | |
3643 | irq_resource.flags = IORESOURCE_IRQ; | |
3644 | pdev = platform_device_register_simple((char *)octeon_usb_driver. name, device, &irq_resource, 1); | |
3645 | if (IS_ERR(pdev)) { | |
771378bb AK |
3646 | driver_unregister(&octeon_usb_driver); |
3647 | octeon_usb_registered = 0; | |
3648 | return PTR_ERR(pdev); | |
3649 | } | |
3650 | if (device < MAX_USB_PORTS) | |
3651 | pdev_glob[device] = pdev; | |
3652 | ||
3653 | } | |
3654 | return 0; | |
b164935b AK |
3655 | } |
3656 | ||
3657 | static void __exit octeon_usb_module_cleanup(void) | |
3658 | { | |
771378bb | 3659 | int i; |
71e06db3 | 3660 | |
771378bb AK |
3661 | for (i = 0; i < MAX_USB_PORTS; i++) |
3662 | if (pdev_glob[i]) { | |
3663 | platform_device_unregister(pdev_glob[i]); | |
3664 | pdev_glob[i] = NULL; | |
3665 | } | |
b164935b AK |
3666 | if (octeon_usb_registered) |
3667 | driver_unregister(&octeon_usb_driver); | |
3668 | } | |
3669 | ||
3670 | MODULE_LICENSE("GPL"); | |
3671 | MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>"); | |
3672 | MODULE_DESCRIPTION("Cavium Networks Octeon USB Host driver."); | |
3673 | module_init(octeon_usb_module_init); | |
3674 | module_exit(octeon_usb_module_cleanup); |