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7359d482 PZ |
1 | /* |
2 | * hcd_intr.c - DesignWare HS OTG Controller host-mode interrupt handling | |
3 | * | |
4 | * Copyright (C) 2004-2013 Synopsys, Inc. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions, and the following disclaimer, | |
11 | * without modification. | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in the | |
14 | * documentation and/or other materials provided with the distribution. | |
15 | * 3. The names of the above-listed copyright holders may not be used | |
16 | * to endorse or promote products derived from this software without | |
17 | * specific prior written permission. | |
18 | * | |
19 | * ALTERNATIVELY, this software may be distributed under the terms of the | |
20 | * GNU General Public License ("GPL") as published by the Free Software | |
21 | * Foundation; either version 2 of the License, or (at your option) any | |
22 | * later version. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS | |
25 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
26 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
27 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
28 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
29 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
30 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
31 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | */ | |
36 | ||
37 | /* | |
38 | * This file contains the interrupt handlers for Host mode | |
39 | */ | |
40 | #include <linux/kernel.h> | |
41 | #include <linux/module.h> | |
42 | #include <linux/spinlock.h> | |
43 | #include <linux/interrupt.h> | |
44 | #include <linux/dma-mapping.h> | |
45 | #include <linux/io.h> | |
46 | #include <linux/slab.h> | |
47 | #include <linux/usb.h> | |
48 | ||
49 | #include <linux/usb/hcd.h> | |
50 | #include <linux/usb/ch11.h> | |
51 | ||
52 | #include "core.h" | |
53 | #include "hcd.h" | |
54 | ||
55 | /* This function is for debug only */ | |
56 | static void dwc2_track_missed_sofs(struct dwc2_hsotg *hsotg) | |
57 | { | |
58 | #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS | |
7359d482 PZ |
59 | u16 curr_frame_number = hsotg->frame_number; |
60 | ||
61 | if (hsotg->frame_num_idx < FRAME_NUM_ARRAY_SIZE) { | |
62 | if (((hsotg->last_frame_num + 1) & HFNUM_MAX_FRNUM) != | |
63 | curr_frame_number) { | |
64 | hsotg->frame_num_array[hsotg->frame_num_idx] = | |
65 | curr_frame_number; | |
66 | hsotg->last_frame_num_array[hsotg->frame_num_idx] = | |
67 | hsotg->last_frame_num; | |
68 | hsotg->frame_num_idx++; | |
69 | } | |
70 | } else if (!hsotg->dumped_frame_num_array) { | |
71 | int i; | |
72 | ||
73 | dev_info(hsotg->dev, "Frame Last Frame\n"); | |
74 | dev_info(hsotg->dev, "----- ----------\n"); | |
75 | for (i = 0; i < FRAME_NUM_ARRAY_SIZE; i++) { | |
76 | dev_info(hsotg->dev, "0x%04x 0x%04x\n", | |
77 | hsotg->frame_num_array[i], | |
78 | hsotg->last_frame_num_array[i]); | |
79 | } | |
80 | hsotg->dumped_frame_num_array = 1; | |
81 | } | |
82 | hsotg->last_frame_num = curr_frame_number; | |
83 | #endif | |
84 | } | |
85 | ||
86 | static void dwc2_hc_handle_tt_clear(struct dwc2_hsotg *hsotg, | |
87 | struct dwc2_host_chan *chan, | |
88 | struct dwc2_qtd *qtd) | |
89 | { | |
90 | struct urb *usb_urb; | |
91 | ||
399fdf9e PZ |
92 | if (!chan->qh) |
93 | return; | |
94 | ||
95 | if (chan->qh->dev_speed == USB_SPEED_HIGH) | |
96 | return; | |
97 | ||
98 | if (!qtd->urb) | |
7359d482 PZ |
99 | return; |
100 | ||
101 | usb_urb = qtd->urb->priv; | |
399fdf9e | 102 | if (!usb_urb || !usb_urb->dev || !usb_urb->dev->tt) |
7359d482 PZ |
103 | return; |
104 | ||
399fdf9e | 105 | if (qtd->urb->status != -EPIPE && qtd->urb->status != -EREMOTEIO) { |
7359d482 PZ |
106 | chan->qh->tt_buffer_dirty = 1; |
107 | if (usb_hub_clear_tt_buffer(usb_urb)) | |
108 | /* Clear failed; let's hope things work anyway */ | |
109 | chan->qh->tt_buffer_dirty = 0; | |
110 | } | |
111 | } | |
112 | ||
113 | /* | |
114 | * Handles the start-of-frame interrupt in host mode. Non-periodic | |
115 | * transactions may be queued to the DWC_otg controller for the current | |
116 | * (micro)frame. Periodic transactions may be queued to the controller | |
117 | * for the next (micro)frame. | |
118 | */ | |
119 | static void dwc2_sof_intr(struct dwc2_hsotg *hsotg) | |
120 | { | |
121 | struct list_head *qh_entry; | |
122 | struct dwc2_qh *qh; | |
7359d482 PZ |
123 | enum dwc2_transaction_type tr_type; |
124 | ||
125 | #ifdef DEBUG_SOF | |
126 | dev_vdbg(hsotg->dev, "--Start of Frame Interrupt--\n"); | |
127 | #endif | |
128 | ||
37e1dcc2 | 129 | hsotg->frame_number = dwc2_hcd_get_frame_number(hsotg); |
7359d482 PZ |
130 | |
131 | dwc2_track_missed_sofs(hsotg); | |
132 | ||
133 | /* Determine whether any periodic QHs should be executed */ | |
134 | qh_entry = hsotg->periodic_sched_inactive.next; | |
135 | while (qh_entry != &hsotg->periodic_sched_inactive) { | |
136 | qh = list_entry(qh_entry, struct dwc2_qh, qh_list_entry); | |
137 | qh_entry = qh_entry->next; | |
138 | if (dwc2_frame_num_le(qh->sched_frame, hsotg->frame_number)) | |
139 | /* | |
140 | * Move QH to the ready list to be executed next | |
141 | * (micro)frame | |
142 | */ | |
143 | list_move(&qh->qh_list_entry, | |
144 | &hsotg->periodic_sched_ready); | |
145 | } | |
146 | tr_type = dwc2_hcd_select_transactions(hsotg); | |
147 | if (tr_type != DWC2_TRANSACTION_NONE) | |
148 | dwc2_hcd_queue_transactions(hsotg, tr_type); | |
149 | ||
150 | /* Clear interrupt */ | |
151 | writel(GINTSTS_SOF, hsotg->regs + GINTSTS); | |
152 | } | |
153 | ||
154 | /* | |
155 | * Handles the Rx FIFO Level Interrupt, which indicates that there is | |
156 | * at least one packet in the Rx FIFO. The packets are moved from the FIFO to | |
157 | * memory if the DWC_otg controller is operating in Slave mode. | |
158 | */ | |
159 | static void dwc2_rx_fifo_level_intr(struct dwc2_hsotg *hsotg) | |
160 | { | |
161 | u32 grxsts, chnum, bcnt, dpid, pktsts; | |
162 | struct dwc2_host_chan *chan; | |
163 | ||
b49977a6 MK |
164 | if (dbg_perio()) |
165 | dev_vdbg(hsotg->dev, "--RxFIFO Level Interrupt--\n"); | |
7359d482 PZ |
166 | |
167 | grxsts = readl(hsotg->regs + GRXSTSP); | |
d6ec53e0 | 168 | chnum = (grxsts & GRXSTS_HCHNUM_MASK) >> GRXSTS_HCHNUM_SHIFT; |
7359d482 PZ |
169 | chan = hsotg->hc_ptr_array[chnum]; |
170 | if (!chan) { | |
171 | dev_err(hsotg->dev, "Unable to get corresponding channel\n"); | |
172 | return; | |
173 | } | |
174 | ||
d6ec53e0 MK |
175 | bcnt = (grxsts & GRXSTS_BYTECNT_MASK) >> GRXSTS_BYTECNT_SHIFT; |
176 | dpid = (grxsts & GRXSTS_DPID_MASK) >> GRXSTS_DPID_SHIFT; | |
f9234633 | 177 | pktsts = (grxsts & GRXSTS_PKTSTS_MASK) >> GRXSTS_PKTSTS_SHIFT; |
7359d482 PZ |
178 | |
179 | /* Packet Status */ | |
b49977a6 MK |
180 | if (dbg_perio()) { |
181 | dev_vdbg(hsotg->dev, " Ch num = %d\n", chnum); | |
182 | dev_vdbg(hsotg->dev, " Count = %d\n", bcnt); | |
183 | dev_vdbg(hsotg->dev, " DPID = %d, chan.dpid = %d\n", dpid, | |
184 | chan->data_pid_start); | |
f9234633 | 185 | dev_vdbg(hsotg->dev, " PStatus = %d\n", pktsts); |
b49977a6 | 186 | } |
7359d482 PZ |
187 | |
188 | switch (pktsts) { | |
189 | case GRXSTS_PKTSTS_HCHIN: | |
190 | /* Read the data into the host buffer */ | |
191 | if (bcnt > 0) { | |
192 | dwc2_read_packet(hsotg, chan->xfer_buf, bcnt); | |
193 | ||
194 | /* Update the HC fields for the next packet received */ | |
195 | chan->xfer_count += bcnt; | |
196 | chan->xfer_buf += bcnt; | |
197 | } | |
198 | break; | |
199 | case GRXSTS_PKTSTS_HCHIN_XFER_COMP: | |
200 | case GRXSTS_PKTSTS_DATATOGGLEERR: | |
201 | case GRXSTS_PKTSTS_HCHHALTED: | |
202 | /* Handled in interrupt, just ignore data */ | |
203 | break; | |
204 | default: | |
205 | dev_err(hsotg->dev, | |
206 | "RxFIFO Level Interrupt: Unknown status %d\n", pktsts); | |
207 | break; | |
208 | } | |
209 | } | |
210 | ||
211 | /* | |
212 | * This interrupt occurs when the non-periodic Tx FIFO is half-empty. More | |
213 | * data packets may be written to the FIFO for OUT transfers. More requests | |
214 | * may be written to the non-periodic request queue for IN transfers. This | |
215 | * interrupt is enabled only in Slave mode. | |
216 | */ | |
217 | static void dwc2_np_tx_fifo_empty_intr(struct dwc2_hsotg *hsotg) | |
218 | { | |
219 | dev_vdbg(hsotg->dev, "--Non-Periodic TxFIFO Empty Interrupt--\n"); | |
220 | dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_NON_PERIODIC); | |
221 | } | |
222 | ||
223 | /* | |
224 | * This interrupt occurs when the periodic Tx FIFO is half-empty. More data | |
225 | * packets may be written to the FIFO for OUT transfers. More requests may be | |
226 | * written to the periodic request queue for IN transfers. This interrupt is | |
227 | * enabled only in Slave mode. | |
228 | */ | |
229 | static void dwc2_perio_tx_fifo_empty_intr(struct dwc2_hsotg *hsotg) | |
230 | { | |
b49977a6 MK |
231 | if (dbg_perio()) |
232 | dev_vdbg(hsotg->dev, "--Periodic TxFIFO Empty Interrupt--\n"); | |
7359d482 PZ |
233 | dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_PERIODIC); |
234 | } | |
235 | ||
236 | static void dwc2_hprt0_enable(struct dwc2_hsotg *hsotg, u32 hprt0, | |
237 | u32 *hprt0_modify) | |
238 | { | |
239 | struct dwc2_core_params *params = hsotg->core_params; | |
240 | int do_reset = 0; | |
241 | u32 usbcfg; | |
242 | u32 prtspd; | |
243 | u32 hcfg; | |
bcc5defa | 244 | u32 fslspclksel; |
7359d482 PZ |
245 | u32 hfir; |
246 | ||
247 | dev_vdbg(hsotg->dev, "%s(%p)\n", __func__, hsotg); | |
248 | ||
249 | /* Every time when port enables calculate HFIR.FrInterval */ | |
250 | hfir = readl(hsotg->regs + HFIR); | |
251 | hfir &= ~HFIR_FRINT_MASK; | |
252 | hfir |= dwc2_calc_frame_interval(hsotg) << HFIR_FRINT_SHIFT & | |
253 | HFIR_FRINT_MASK; | |
254 | writel(hfir, hsotg->regs + HFIR); | |
255 | ||
256 | /* Check if we need to adjust the PHY clock speed for low power */ | |
257 | if (!params->host_support_fs_ls_low_power) { | |
258 | /* Port has been enabled, set the reset change flag */ | |
259 | hsotg->flags.b.port_reset_change = 1; | |
260 | return; | |
261 | } | |
262 | ||
263 | usbcfg = readl(hsotg->regs + GUSBCFG); | |
f9234633 | 264 | prtspd = (hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT; |
7359d482 PZ |
265 | |
266 | if (prtspd == HPRT0_SPD_LOW_SPEED || prtspd == HPRT0_SPD_FULL_SPEED) { | |
267 | /* Low power */ | |
268 | if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL)) { | |
269 | /* Set PHY low power clock select for FS/LS devices */ | |
270 | usbcfg |= GUSBCFG_PHY_LP_CLK_SEL; | |
271 | writel(usbcfg, hsotg->regs + GUSBCFG); | |
272 | do_reset = 1; | |
273 | } | |
274 | ||
275 | hcfg = readl(hsotg->regs + HCFG); | |
f9234633 MK |
276 | fslspclksel = (hcfg & HCFG_FSLSPCLKSEL_MASK) >> |
277 | HCFG_FSLSPCLKSEL_SHIFT; | |
7359d482 PZ |
278 | |
279 | if (prtspd == HPRT0_SPD_LOW_SPEED && | |
280 | params->host_ls_low_power_phy_clk == | |
281 | DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ) { | |
282 | /* 6 MHZ */ | |
283 | dev_vdbg(hsotg->dev, | |
284 | "FS_PHY programming HCFG to 6 MHz\n"); | |
bcc5defa | 285 | if (fslspclksel != HCFG_FSLSPCLKSEL_6_MHZ) { |
f9234633 | 286 | fslspclksel = HCFG_FSLSPCLKSEL_6_MHZ; |
7359d482 | 287 | hcfg &= ~HCFG_FSLSPCLKSEL_MASK; |
f9234633 | 288 | hcfg |= fslspclksel << HCFG_FSLSPCLKSEL_SHIFT; |
7359d482 PZ |
289 | writel(hcfg, hsotg->regs + HCFG); |
290 | do_reset = 1; | |
291 | } | |
292 | } else { | |
293 | /* 48 MHZ */ | |
294 | dev_vdbg(hsotg->dev, | |
295 | "FS_PHY programming HCFG to 48 MHz\n"); | |
bcc5defa | 296 | if (fslspclksel != HCFG_FSLSPCLKSEL_48_MHZ) { |
f9234633 | 297 | fslspclksel = HCFG_FSLSPCLKSEL_48_MHZ; |
7359d482 | 298 | hcfg &= ~HCFG_FSLSPCLKSEL_MASK; |
f9234633 | 299 | hcfg |= fslspclksel << HCFG_FSLSPCLKSEL_SHIFT; |
7359d482 PZ |
300 | writel(hcfg, hsotg->regs + HCFG); |
301 | do_reset = 1; | |
302 | } | |
303 | } | |
304 | } else { | |
305 | /* Not low power */ | |
306 | if (usbcfg & GUSBCFG_PHY_LP_CLK_SEL) { | |
307 | usbcfg &= ~GUSBCFG_PHY_LP_CLK_SEL; | |
308 | writel(usbcfg, hsotg->regs + GUSBCFG); | |
309 | do_reset = 1; | |
310 | } | |
311 | } | |
312 | ||
313 | if (do_reset) { | |
314 | *hprt0_modify |= HPRT0_RST; | |
315 | queue_delayed_work(hsotg->wq_otg, &hsotg->reset_work, | |
316 | msecs_to_jiffies(60)); | |
317 | } else { | |
318 | /* Port has been enabled, set the reset change flag */ | |
319 | hsotg->flags.b.port_reset_change = 1; | |
320 | } | |
321 | } | |
322 | ||
323 | /* | |
324 | * There are multiple conditions that can cause a port interrupt. This function | |
325 | * determines which interrupt conditions have occurred and handles them | |
326 | * appropriately. | |
327 | */ | |
328 | static void dwc2_port_intr(struct dwc2_hsotg *hsotg) | |
329 | { | |
330 | u32 hprt0; | |
331 | u32 hprt0_modify; | |
332 | ||
333 | dev_vdbg(hsotg->dev, "--Port Interrupt--\n"); | |
334 | ||
335 | hprt0 = readl(hsotg->regs + HPRT0); | |
336 | hprt0_modify = hprt0; | |
337 | ||
338 | /* | |
339 | * Clear appropriate bits in HPRT0 to clear the interrupt bit in | |
340 | * GINTSTS | |
341 | */ | |
342 | hprt0_modify &= ~(HPRT0_ENA | HPRT0_CONNDET | HPRT0_ENACHG | | |
343 | HPRT0_OVRCURRCHG); | |
344 | ||
345 | /* | |
346 | * Port Connect Detected | |
347 | * Set flag and clear if detected | |
348 | */ | |
349 | if (hprt0 & HPRT0_CONNDET) { | |
350 | dev_vdbg(hsotg->dev, | |
351 | "--Port Interrupt HPRT0=0x%08x Port Connect Detected--\n", | |
352 | hprt0); | |
353 | hsotg->flags.b.port_connect_status_change = 1; | |
354 | hsotg->flags.b.port_connect_status = 1; | |
355 | hprt0_modify |= HPRT0_CONNDET; | |
356 | ||
357 | /* | |
358 | * The Hub driver asserts a reset when it sees port connect | |
359 | * status change flag | |
360 | */ | |
361 | } | |
362 | ||
363 | /* | |
364 | * Port Enable Changed | |
365 | * Clear if detected - Set internal flag if disabled | |
366 | */ | |
367 | if (hprt0 & HPRT0_ENACHG) { | |
368 | dev_vdbg(hsotg->dev, | |
369 | " --Port Interrupt HPRT0=0x%08x Port Enable Changed (now %d)--\n", | |
370 | hprt0, !!(hprt0 & HPRT0_ENA)); | |
371 | hprt0_modify |= HPRT0_ENACHG; | |
372 | if (hprt0 & HPRT0_ENA) | |
373 | dwc2_hprt0_enable(hsotg, hprt0, &hprt0_modify); | |
374 | else | |
375 | hsotg->flags.b.port_enable_change = 1; | |
376 | } | |
377 | ||
378 | /* Overcurrent Change Interrupt */ | |
379 | if (hprt0 & HPRT0_OVRCURRCHG) { | |
380 | dev_vdbg(hsotg->dev, | |
381 | " --Port Interrupt HPRT0=0x%08x Port Overcurrent Changed--\n", | |
382 | hprt0); | |
383 | hsotg->flags.b.port_over_current_change = 1; | |
384 | hprt0_modify |= HPRT0_OVRCURRCHG; | |
385 | } | |
386 | ||
387 | /* Clear Port Interrupts */ | |
388 | writel(hprt0_modify, hsotg->regs + HPRT0); | |
389 | } | |
390 | ||
391 | /* | |
392 | * Gets the actual length of a transfer after the transfer halts. halt_status | |
393 | * holds the reason for the halt. | |
394 | * | |
395 | * For IN transfers where halt_status is DWC2_HC_XFER_COMPLETE, *short_read | |
396 | * is set to 1 upon return if less than the requested number of bytes were | |
397 | * transferred. short_read may also be NULL on entry, in which case it remains | |
398 | * unchanged. | |
399 | */ | |
400 | static u32 dwc2_get_actual_xfer_length(struct dwc2_hsotg *hsotg, | |
401 | struct dwc2_host_chan *chan, int chnum, | |
402 | struct dwc2_qtd *qtd, | |
403 | enum dwc2_halt_status halt_status, | |
404 | int *short_read) | |
405 | { | |
406 | u32 hctsiz, count, length; | |
407 | ||
408 | hctsiz = readl(hsotg->regs + HCTSIZ(chnum)); | |
409 | ||
410 | if (halt_status == DWC2_HC_XFER_COMPLETE) { | |
411 | if (chan->ep_is_in) { | |
d6ec53e0 MK |
412 | count = (hctsiz & TSIZ_XFERSIZE_MASK) >> |
413 | TSIZ_XFERSIZE_SHIFT; | |
7359d482 PZ |
414 | length = chan->xfer_len - count; |
415 | if (short_read != NULL) | |
416 | *short_read = (count != 0); | |
417 | } else if (chan->qh->do_split) { | |
418 | length = qtd->ssplit_out_xfer_count; | |
419 | } else { | |
420 | length = chan->xfer_len; | |
421 | } | |
422 | } else { | |
423 | /* | |
424 | * Must use the hctsiz.pktcnt field to determine how much data | |
425 | * has been transferred. This field reflects the number of | |
426 | * packets that have been transferred via the USB. This is | |
427 | * always an integral number of packets if the transfer was | |
428 | * halted before its normal completion. (Can't use the | |
429 | * hctsiz.xfersize field because that reflects the number of | |
430 | * bytes transferred via the AHB, not the USB). | |
431 | */ | |
d6ec53e0 | 432 | count = (hctsiz & TSIZ_PKTCNT_MASK) >> TSIZ_PKTCNT_SHIFT; |
7359d482 PZ |
433 | length = (chan->start_pkt_count - count) * chan->max_packet; |
434 | } | |
435 | ||
436 | return length; | |
437 | } | |
438 | ||
439 | /** | |
440 | * dwc2_update_urb_state() - Updates the state of the URB after a Transfer | |
441 | * Complete interrupt on the host channel. Updates the actual_length field | |
442 | * of the URB based on the number of bytes transferred via the host channel. | |
443 | * Sets the URB status if the data transfer is finished. | |
444 | * | |
445 | * Return: 1 if the data transfer specified by the URB is completely finished, | |
446 | * 0 otherwise | |
447 | */ | |
448 | static int dwc2_update_urb_state(struct dwc2_hsotg *hsotg, | |
449 | struct dwc2_host_chan *chan, int chnum, | |
450 | struct dwc2_hcd_urb *urb, | |
451 | struct dwc2_qtd *qtd) | |
452 | { | |
453 | u32 hctsiz; | |
454 | int xfer_done = 0; | |
455 | int short_read = 0; | |
456 | int xfer_length = dwc2_get_actual_xfer_length(hsotg, chan, chnum, qtd, | |
457 | DWC2_HC_XFER_COMPLETE, | |
458 | &short_read); | |
459 | ||
460 | if (urb->actual_length + xfer_length > urb->length) { | |
461 | dev_warn(hsotg->dev, "%s(): trimming xfer length\n", __func__); | |
462 | xfer_length = urb->length - urb->actual_length; | |
463 | } | |
464 | ||
465 | /* Non DWORD-aligned buffer case handling */ | |
466 | if (chan->align_buf && xfer_length && chan->ep_is_in) { | |
0cf31f86 | 467 | dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", __func__); |
7359d482 PZ |
468 | dma_sync_single_for_cpu(hsotg->dev, urb->dma, urb->length, |
469 | DMA_FROM_DEVICE); | |
470 | memcpy(urb->buf + urb->actual_length, chan->qh->dw_align_buf, | |
471 | xfer_length); | |
472 | dma_sync_single_for_device(hsotg->dev, urb->dma, urb->length, | |
473 | DMA_FROM_DEVICE); | |
474 | } | |
475 | ||
476 | dev_vdbg(hsotg->dev, "urb->actual_length=%d xfer_length=%d\n", | |
477 | urb->actual_length, xfer_length); | |
478 | urb->actual_length += xfer_length; | |
479 | ||
480 | if (xfer_length && chan->ep_type == USB_ENDPOINT_XFER_BULK && | |
481 | (urb->flags & URB_SEND_ZERO_PACKET) && | |
482 | urb->actual_length >= urb->length && | |
483 | !(urb->length % chan->max_packet)) { | |
484 | xfer_done = 0; | |
485 | } else if (short_read || urb->actual_length >= urb->length) { | |
486 | xfer_done = 1; | |
487 | urb->status = 0; | |
488 | } | |
489 | ||
490 | hctsiz = readl(hsotg->regs + HCTSIZ(chnum)); | |
491 | dev_vdbg(hsotg->dev, "DWC_otg: %s: %s, channel %d\n", | |
492 | __func__, (chan->ep_is_in ? "IN" : "OUT"), chnum); | |
493 | dev_vdbg(hsotg->dev, " chan->xfer_len %d\n", chan->xfer_len); | |
494 | dev_vdbg(hsotg->dev, " hctsiz.xfersize %d\n", | |
d6ec53e0 | 495 | (hctsiz & TSIZ_XFERSIZE_MASK) >> TSIZ_XFERSIZE_SHIFT); |
7359d482 PZ |
496 | dev_vdbg(hsotg->dev, " urb->transfer_buffer_length %d\n", urb->length); |
497 | dev_vdbg(hsotg->dev, " urb->actual_length %d\n", urb->actual_length); | |
498 | dev_vdbg(hsotg->dev, " short_read %d, xfer_done %d\n", short_read, | |
499 | xfer_done); | |
500 | ||
501 | return xfer_done; | |
502 | } | |
503 | ||
504 | /* | |
505 | * Save the starting data toggle for the next transfer. The data toggle is | |
506 | * saved in the QH for non-control transfers and it's saved in the QTD for | |
507 | * control transfers. | |
508 | */ | |
509 | void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg, | |
510 | struct dwc2_host_chan *chan, int chnum, | |
511 | struct dwc2_qtd *qtd) | |
512 | { | |
513 | u32 hctsiz = readl(hsotg->regs + HCTSIZ(chnum)); | |
f9234633 | 514 | u32 pid = (hctsiz & TSIZ_SC_MC_PID_MASK) >> TSIZ_SC_MC_PID_SHIFT; |
7359d482 PZ |
515 | |
516 | if (chan->ep_type != USB_ENDPOINT_XFER_CONTROL) { | |
517 | if (pid == TSIZ_SC_MC_PID_DATA0) | |
518 | chan->qh->data_toggle = DWC2_HC_PID_DATA0; | |
519 | else | |
520 | chan->qh->data_toggle = DWC2_HC_PID_DATA1; | |
521 | } else { | |
522 | if (pid == TSIZ_SC_MC_PID_DATA0) | |
523 | qtd->data_toggle = DWC2_HC_PID_DATA0; | |
524 | else | |
525 | qtd->data_toggle = DWC2_HC_PID_DATA1; | |
526 | } | |
527 | } | |
528 | ||
529 | /** | |
530 | * dwc2_update_isoc_urb_state() - Updates the state of an Isochronous URB when | |
531 | * the transfer is stopped for any reason. The fields of the current entry in | |
532 | * the frame descriptor array are set based on the transfer state and the input | |
533 | * halt_status. Completes the Isochronous URB if all the URB frames have been | |
534 | * completed. | |
535 | * | |
536 | * Return: DWC2_HC_XFER_COMPLETE if there are more frames remaining to be | |
537 | * transferred in the URB. Otherwise return DWC2_HC_XFER_URB_COMPLETE. | |
538 | */ | |
539 | static enum dwc2_halt_status dwc2_update_isoc_urb_state( | |
540 | struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan, | |
541 | int chnum, struct dwc2_qtd *qtd, | |
542 | enum dwc2_halt_status halt_status) | |
543 | { | |
544 | struct dwc2_hcd_iso_packet_desc *frame_desc; | |
545 | struct dwc2_hcd_urb *urb = qtd->urb; | |
546 | ||
547 | if (!urb) | |
548 | return DWC2_HC_XFER_NO_HALT_STATUS; | |
549 | ||
550 | frame_desc = &urb->iso_descs[qtd->isoc_frame_index]; | |
551 | ||
552 | switch (halt_status) { | |
553 | case DWC2_HC_XFER_COMPLETE: | |
554 | frame_desc->status = 0; | |
555 | frame_desc->actual_length = dwc2_get_actual_xfer_length(hsotg, | |
556 | chan, chnum, qtd, halt_status, NULL); | |
557 | ||
558 | /* Non DWORD-aligned buffer case handling */ | |
559 | if (chan->align_buf && frame_desc->actual_length && | |
560 | chan->ep_is_in) { | |
0cf31f86 PZ |
561 | dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", |
562 | __func__); | |
7359d482 PZ |
563 | dma_sync_single_for_cpu(hsotg->dev, urb->dma, |
564 | urb->length, DMA_FROM_DEVICE); | |
565 | memcpy(urb->buf + frame_desc->offset + | |
566 | qtd->isoc_split_offset, chan->qh->dw_align_buf, | |
567 | frame_desc->actual_length); | |
568 | dma_sync_single_for_device(hsotg->dev, urb->dma, | |
569 | urb->length, | |
570 | DMA_FROM_DEVICE); | |
571 | } | |
572 | break; | |
573 | case DWC2_HC_XFER_FRAME_OVERRUN: | |
574 | urb->error_count++; | |
575 | if (chan->ep_is_in) | |
576 | frame_desc->status = -ENOSR; | |
577 | else | |
578 | frame_desc->status = -ECOMM; | |
579 | frame_desc->actual_length = 0; | |
580 | break; | |
581 | case DWC2_HC_XFER_BABBLE_ERR: | |
582 | urb->error_count++; | |
583 | frame_desc->status = -EOVERFLOW; | |
584 | /* Don't need to update actual_length in this case */ | |
585 | break; | |
586 | case DWC2_HC_XFER_XACT_ERR: | |
587 | urb->error_count++; | |
588 | frame_desc->status = -EPROTO; | |
589 | frame_desc->actual_length = dwc2_get_actual_xfer_length(hsotg, | |
590 | chan, chnum, qtd, halt_status, NULL); | |
591 | ||
592 | /* Non DWORD-aligned buffer case handling */ | |
593 | if (chan->align_buf && frame_desc->actual_length && | |
594 | chan->ep_is_in) { | |
0cf31f86 PZ |
595 | dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", |
596 | __func__); | |
7359d482 PZ |
597 | dma_sync_single_for_cpu(hsotg->dev, urb->dma, |
598 | urb->length, DMA_FROM_DEVICE); | |
599 | memcpy(urb->buf + frame_desc->offset + | |
600 | qtd->isoc_split_offset, chan->qh->dw_align_buf, | |
601 | frame_desc->actual_length); | |
602 | dma_sync_single_for_device(hsotg->dev, urb->dma, | |
603 | urb->length, | |
604 | DMA_FROM_DEVICE); | |
605 | } | |
606 | ||
607 | /* Skip whole frame */ | |
608 | if (chan->qh->do_split && | |
609 | chan->ep_type == USB_ENDPOINT_XFER_ISOC && chan->ep_is_in && | |
610 | hsotg->core_params->dma_enable > 0) { | |
611 | qtd->complete_split = 0; | |
612 | qtd->isoc_split_offset = 0; | |
613 | } | |
614 | ||
615 | break; | |
616 | default: | |
617 | dev_err(hsotg->dev, "Unhandled halt_status (%d)\n", | |
618 | halt_status); | |
619 | break; | |
620 | } | |
621 | ||
622 | if (++qtd->isoc_frame_index == urb->packet_count) { | |
623 | /* | |
624 | * urb->status is not used for isoc transfers. The individual | |
625 | * frame_desc statuses are used instead. | |
626 | */ | |
0d012b98 | 627 | dwc2_host_complete(hsotg, qtd, 0); |
7359d482 PZ |
628 | halt_status = DWC2_HC_XFER_URB_COMPLETE; |
629 | } else { | |
630 | halt_status = DWC2_HC_XFER_COMPLETE; | |
631 | } | |
632 | ||
633 | return halt_status; | |
634 | } | |
635 | ||
636 | /* | |
637 | * Frees the first QTD in the QH's list if free_qtd is 1. For non-periodic | |
638 | * QHs, removes the QH from the active non-periodic schedule. If any QTDs are | |
639 | * still linked to the QH, the QH is added to the end of the inactive | |
640 | * non-periodic schedule. For periodic QHs, removes the QH from the periodic | |
641 | * schedule if no more QTDs are linked to the QH. | |
642 | */ | |
643 | static void dwc2_deactivate_qh(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, | |
644 | int free_qtd) | |
645 | { | |
646 | int continue_split = 0; | |
647 | struct dwc2_qtd *qtd; | |
648 | ||
b49977a6 MK |
649 | if (dbg_qh(qh)) |
650 | dev_vdbg(hsotg->dev, " %s(%p,%p,%d)\n", __func__, | |
651 | hsotg, qh, free_qtd); | |
7359d482 PZ |
652 | |
653 | if (list_empty(&qh->qtd_list)) { | |
654 | dev_dbg(hsotg->dev, "## QTD list empty ##\n"); | |
655 | goto no_qtd; | |
656 | } | |
657 | ||
658 | qtd = list_first_entry(&qh->qtd_list, struct dwc2_qtd, qtd_list_entry); | |
659 | ||
660 | if (qtd->complete_split) | |
661 | continue_split = 1; | |
662 | else if (qtd->isoc_split_pos == DWC2_HCSPLT_XACTPOS_MID || | |
663 | qtd->isoc_split_pos == DWC2_HCSPLT_XACTPOS_END) | |
664 | continue_split = 1; | |
665 | ||
666 | if (free_qtd) { | |
667 | dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh); | |
668 | continue_split = 0; | |
669 | } | |
670 | ||
671 | no_qtd: | |
672 | if (qh->channel) | |
673 | qh->channel->align_buf = 0; | |
674 | qh->channel = NULL; | |
675 | dwc2_hcd_qh_deactivate(hsotg, qh, continue_split); | |
676 | } | |
677 | ||
678 | /** | |
679 | * dwc2_release_channel() - Releases a host channel for use by other transfers | |
680 | * | |
681 | * @hsotg: The HCD state structure | |
682 | * @chan: The host channel to release | |
683 | * @qtd: The QTD associated with the host channel. This QTD may be | |
684 | * freed if the transfer is complete or an error has occurred. | |
685 | * @halt_status: Reason the channel is being released. This status | |
686 | * determines the actions taken by this function. | |
687 | * | |
688 | * Also attempts to select and queue more transactions since at least one host | |
689 | * channel is available. | |
690 | */ | |
691 | static void dwc2_release_channel(struct dwc2_hsotg *hsotg, | |
692 | struct dwc2_host_chan *chan, | |
693 | struct dwc2_qtd *qtd, | |
694 | enum dwc2_halt_status halt_status) | |
695 | { | |
696 | enum dwc2_transaction_type tr_type; | |
697 | u32 haintmsk; | |
698 | int free_qtd = 0; | |
699 | ||
b49977a6 MK |
700 | if (dbg_hc(chan)) |
701 | dev_vdbg(hsotg->dev, " %s: channel %d, halt_status %d\n", | |
702 | __func__, chan->hc_num, halt_status); | |
7359d482 PZ |
703 | |
704 | switch (halt_status) { | |
705 | case DWC2_HC_XFER_URB_COMPLETE: | |
706 | free_qtd = 1; | |
707 | break; | |
708 | case DWC2_HC_XFER_AHB_ERR: | |
709 | case DWC2_HC_XFER_STALL: | |
710 | case DWC2_HC_XFER_BABBLE_ERR: | |
711 | free_qtd = 1; | |
712 | break; | |
713 | case DWC2_HC_XFER_XACT_ERR: | |
8509f2f4 | 714 | if (qtd && qtd->error_count >= 3) { |
7359d482 PZ |
715 | dev_vdbg(hsotg->dev, |
716 | " Complete URB with transaction error\n"); | |
717 | free_qtd = 1; | |
0d012b98 | 718 | dwc2_host_complete(hsotg, qtd, -EPROTO); |
7359d482 PZ |
719 | } |
720 | break; | |
721 | case DWC2_HC_XFER_URB_DEQUEUE: | |
722 | /* | |
723 | * The QTD has already been removed and the QH has been | |
724 | * deactivated. Don't want to do anything except release the | |
725 | * host channel and try to queue more transfers. | |
726 | */ | |
727 | goto cleanup; | |
728 | case DWC2_HC_XFER_PERIODIC_INCOMPLETE: | |
729 | dev_vdbg(hsotg->dev, " Complete URB with I/O error\n"); | |
730 | free_qtd = 1; | |
0d012b98 | 731 | dwc2_host_complete(hsotg, qtd, -EIO); |
7359d482 PZ |
732 | break; |
733 | case DWC2_HC_XFER_NO_HALT_STATUS: | |
734 | default: | |
735 | break; | |
736 | } | |
737 | ||
738 | dwc2_deactivate_qh(hsotg, chan->qh, free_qtd); | |
739 | ||
740 | cleanup: | |
741 | /* | |
742 | * Release the host channel for use by other transfers. The cleanup | |
743 | * function clears the channel interrupt enables and conditions, so | |
744 | * there's no need to clear the Channel Halted interrupt separately. | |
745 | */ | |
746 | if (!list_empty(&chan->hc_list_entry)) | |
747 | list_del(&chan->hc_list_entry); | |
748 | dwc2_hc_cleanup(hsotg, chan); | |
749 | list_add_tail(&chan->hc_list_entry, &hsotg->free_hc_list); | |
750 | ||
20f2eb9c DC |
751 | if (hsotg->core_params->uframe_sched > 0) { |
752 | hsotg->available_host_channels++; | |
753 | } else { | |
754 | switch (chan->ep_type) { | |
755 | case USB_ENDPOINT_XFER_CONTROL: | |
756 | case USB_ENDPOINT_XFER_BULK: | |
757 | hsotg->non_periodic_channels--; | |
758 | break; | |
759 | default: | |
760 | /* | |
761 | * Don't release reservations for periodic channels | |
762 | * here. That's done when a periodic transfer is | |
763 | * descheduled (i.e. when the QH is removed from the | |
764 | * periodic schedule). | |
765 | */ | |
766 | break; | |
767 | } | |
7359d482 PZ |
768 | } |
769 | ||
770 | haintmsk = readl(hsotg->regs + HAINTMSK); | |
771 | haintmsk &= ~(1 << chan->hc_num); | |
772 | writel(haintmsk, hsotg->regs + HAINTMSK); | |
773 | ||
774 | /* Try to queue more transfers now that there's a free channel */ | |
775 | tr_type = dwc2_hcd_select_transactions(hsotg); | |
776 | if (tr_type != DWC2_TRANSACTION_NONE) | |
777 | dwc2_hcd_queue_transactions(hsotg, tr_type); | |
778 | } | |
779 | ||
780 | /* | |
781 | * Halts a host channel. If the channel cannot be halted immediately because | |
782 | * the request queue is full, this function ensures that the FIFO empty | |
783 | * interrupt for the appropriate queue is enabled so that the halt request can | |
784 | * be queued when there is space in the request queue. | |
785 | * | |
786 | * This function may also be called in DMA mode. In that case, the channel is | |
787 | * simply released since the core always halts the channel automatically in | |
788 | * DMA mode. | |
789 | */ | |
790 | static void dwc2_halt_channel(struct dwc2_hsotg *hsotg, | |
791 | struct dwc2_host_chan *chan, struct dwc2_qtd *qtd, | |
792 | enum dwc2_halt_status halt_status) | |
793 | { | |
b49977a6 MK |
794 | if (dbg_hc(chan)) |
795 | dev_vdbg(hsotg->dev, "%s()\n", __func__); | |
7359d482 PZ |
796 | |
797 | if (hsotg->core_params->dma_enable > 0) { | |
b49977a6 MK |
798 | if (dbg_hc(chan)) |
799 | dev_vdbg(hsotg->dev, "DMA enabled\n"); | |
7359d482 PZ |
800 | dwc2_release_channel(hsotg, chan, qtd, halt_status); |
801 | return; | |
802 | } | |
803 | ||
804 | /* Slave mode processing */ | |
805 | dwc2_hc_halt(hsotg, chan, halt_status); | |
806 | ||
807 | if (chan->halt_on_queue) { | |
808 | u32 gintmsk; | |
809 | ||
810 | dev_vdbg(hsotg->dev, "Halt on queue\n"); | |
811 | if (chan->ep_type == USB_ENDPOINT_XFER_CONTROL || | |
812 | chan->ep_type == USB_ENDPOINT_XFER_BULK) { | |
813 | dev_vdbg(hsotg->dev, "control/bulk\n"); | |
814 | /* | |
815 | * Make sure the Non-periodic Tx FIFO empty interrupt | |
816 | * is enabled so that the non-periodic schedule will | |
817 | * be processed | |
818 | */ | |
819 | gintmsk = readl(hsotg->regs + GINTMSK); | |
820 | gintmsk |= GINTSTS_NPTXFEMP; | |
821 | writel(gintmsk, hsotg->regs + GINTMSK); | |
822 | } else { | |
823 | dev_vdbg(hsotg->dev, "isoc/intr\n"); | |
824 | /* | |
825 | * Move the QH from the periodic queued schedule to | |
826 | * the periodic assigned schedule. This allows the | |
827 | * halt to be queued when the periodic schedule is | |
828 | * processed. | |
829 | */ | |
830 | list_move(&chan->qh->qh_list_entry, | |
831 | &hsotg->periodic_sched_assigned); | |
832 | ||
833 | /* | |
834 | * Make sure the Periodic Tx FIFO Empty interrupt is | |
835 | * enabled so that the periodic schedule will be | |
836 | * processed | |
837 | */ | |
838 | gintmsk = readl(hsotg->regs + GINTMSK); | |
839 | gintmsk |= GINTSTS_PTXFEMP; | |
840 | writel(gintmsk, hsotg->regs + GINTMSK); | |
841 | } | |
842 | } | |
843 | } | |
844 | ||
845 | /* | |
846 | * Performs common cleanup for non-periodic transfers after a Transfer | |
847 | * Complete interrupt. This function should be called after any endpoint type | |
848 | * specific handling is finished to release the host channel. | |
849 | */ | |
850 | static void dwc2_complete_non_periodic_xfer(struct dwc2_hsotg *hsotg, | |
851 | struct dwc2_host_chan *chan, | |
852 | int chnum, struct dwc2_qtd *qtd, | |
853 | enum dwc2_halt_status halt_status) | |
854 | { | |
855 | dev_vdbg(hsotg->dev, "%s()\n", __func__); | |
856 | ||
857 | qtd->error_count = 0; | |
858 | ||
859 | if (chan->hcint & HCINTMSK_NYET) { | |
860 | /* | |
861 | * Got a NYET on the last transaction of the transfer. This | |
862 | * means that the endpoint should be in the PING state at the | |
863 | * beginning of the next transfer. | |
864 | */ | |
865 | dev_vdbg(hsotg->dev, "got NYET\n"); | |
866 | chan->qh->ping_state = 1; | |
867 | } | |
868 | ||
869 | /* | |
870 | * Always halt and release the host channel to make it available for | |
871 | * more transfers. There may still be more phases for a control | |
872 | * transfer or more data packets for a bulk transfer at this point, | |
873 | * but the host channel is still halted. A channel will be reassigned | |
874 | * to the transfer when the non-periodic schedule is processed after | |
875 | * the channel is released. This allows transactions to be queued | |
876 | * properly via dwc2_hcd_queue_transactions, which also enables the | |
877 | * Tx FIFO Empty interrupt if necessary. | |
878 | */ | |
879 | if (chan->ep_is_in) { | |
880 | /* | |
881 | * IN transfers in Slave mode require an explicit disable to | |
882 | * halt the channel. (In DMA mode, this call simply releases | |
883 | * the channel.) | |
884 | */ | |
885 | dwc2_halt_channel(hsotg, chan, qtd, halt_status); | |
886 | } else { | |
887 | /* | |
888 | * The channel is automatically disabled by the core for OUT | |
889 | * transfers in Slave mode | |
890 | */ | |
891 | dwc2_release_channel(hsotg, chan, qtd, halt_status); | |
892 | } | |
893 | } | |
894 | ||
895 | /* | |
896 | * Performs common cleanup for periodic transfers after a Transfer Complete | |
897 | * interrupt. This function should be called after any endpoint type specific | |
898 | * handling is finished to release the host channel. | |
899 | */ | |
900 | static void dwc2_complete_periodic_xfer(struct dwc2_hsotg *hsotg, | |
901 | struct dwc2_host_chan *chan, int chnum, | |
902 | struct dwc2_qtd *qtd, | |
903 | enum dwc2_halt_status halt_status) | |
904 | { | |
905 | u32 hctsiz = readl(hsotg->regs + HCTSIZ(chnum)); | |
906 | ||
907 | qtd->error_count = 0; | |
908 | ||
909 | if (!chan->ep_is_in || (hctsiz & TSIZ_PKTCNT_MASK) == 0) | |
910 | /* Core halts channel in these cases */ | |
911 | dwc2_release_channel(hsotg, chan, qtd, halt_status); | |
912 | else | |
913 | /* Flush any outstanding requests from the Tx queue */ | |
914 | dwc2_halt_channel(hsotg, chan, qtd, halt_status); | |
915 | } | |
916 | ||
917 | static int dwc2_xfercomp_isoc_split_in(struct dwc2_hsotg *hsotg, | |
918 | struct dwc2_host_chan *chan, int chnum, | |
919 | struct dwc2_qtd *qtd) | |
920 | { | |
921 | struct dwc2_hcd_iso_packet_desc *frame_desc; | |
922 | u32 len; | |
923 | ||
924 | if (!qtd->urb) | |
925 | return 0; | |
926 | ||
927 | frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index]; | |
928 | len = dwc2_get_actual_xfer_length(hsotg, chan, chnum, qtd, | |
929 | DWC2_HC_XFER_COMPLETE, NULL); | |
930 | if (!len) { | |
931 | qtd->complete_split = 0; | |
932 | qtd->isoc_split_offset = 0; | |
933 | return 0; | |
934 | } | |
935 | ||
936 | frame_desc->actual_length += len; | |
937 | ||
e7e59e11 | 938 | if (chan->align_buf) { |
0cf31f86 | 939 | dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", __func__); |
7359d482 PZ |
940 | dma_sync_single_for_cpu(hsotg->dev, qtd->urb->dma, |
941 | qtd->urb->length, DMA_FROM_DEVICE); | |
942 | memcpy(qtd->urb->buf + frame_desc->offset + | |
943 | qtd->isoc_split_offset, chan->qh->dw_align_buf, len); | |
944 | dma_sync_single_for_device(hsotg->dev, qtd->urb->dma, | |
945 | qtd->urb->length, DMA_FROM_DEVICE); | |
946 | } | |
947 | ||
948 | qtd->isoc_split_offset += len; | |
949 | ||
950 | if (frame_desc->actual_length >= frame_desc->length) { | |
951 | frame_desc->status = 0; | |
952 | qtd->isoc_frame_index++; | |
953 | qtd->complete_split = 0; | |
954 | qtd->isoc_split_offset = 0; | |
955 | } | |
956 | ||
957 | if (qtd->isoc_frame_index == qtd->urb->packet_count) { | |
0d012b98 | 958 | dwc2_host_complete(hsotg, qtd, 0); |
7359d482 PZ |
959 | dwc2_release_channel(hsotg, chan, qtd, |
960 | DWC2_HC_XFER_URB_COMPLETE); | |
961 | } else { | |
962 | dwc2_release_channel(hsotg, chan, qtd, | |
963 | DWC2_HC_XFER_NO_HALT_STATUS); | |
964 | } | |
965 | ||
966 | return 1; /* Indicates that channel released */ | |
967 | } | |
968 | ||
969 | /* | |
970 | * Handles a host channel Transfer Complete interrupt. This handler may be | |
971 | * called in either DMA mode or Slave mode. | |
972 | */ | |
973 | static void dwc2_hc_xfercomp_intr(struct dwc2_hsotg *hsotg, | |
974 | struct dwc2_host_chan *chan, int chnum, | |
975 | struct dwc2_qtd *qtd) | |
976 | { | |
977 | struct dwc2_hcd_urb *urb = qtd->urb; | |
978 | int pipe_type = dwc2_hcd_get_pipe_type(&urb->pipe_info); | |
979 | enum dwc2_halt_status halt_status = DWC2_HC_XFER_COMPLETE; | |
980 | int urb_xfer_done; | |
981 | ||
b49977a6 MK |
982 | if (dbg_hc(chan)) |
983 | dev_vdbg(hsotg->dev, | |
984 | "--Host Channel %d Interrupt: Transfer Complete--\n", | |
985 | chnum); | |
7359d482 PZ |
986 | |
987 | if (hsotg->core_params->dma_desc_enable > 0) { | |
988 | dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum, halt_status); | |
989 | if (pipe_type == USB_ENDPOINT_XFER_ISOC) | |
990 | /* Do not disable the interrupt, just clear it */ | |
991 | return; | |
992 | goto handle_xfercomp_done; | |
993 | } | |
994 | ||
995 | /* Handle xfer complete on CSPLIT */ | |
996 | if (chan->qh->do_split) { | |
997 | if (chan->ep_type == USB_ENDPOINT_XFER_ISOC && chan->ep_is_in && | |
998 | hsotg->core_params->dma_enable > 0) { | |
999 | if (qtd->complete_split && | |
1000 | dwc2_xfercomp_isoc_split_in(hsotg, chan, chnum, | |
1001 | qtd)) | |
1002 | goto handle_xfercomp_done; | |
1003 | } else { | |
1004 | qtd->complete_split = 0; | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | if (!urb) | |
1009 | goto handle_xfercomp_done; | |
1010 | ||
1011 | /* Update the QTD and URB states */ | |
1012 | switch (pipe_type) { | |
1013 | case USB_ENDPOINT_XFER_CONTROL: | |
1014 | switch (qtd->control_phase) { | |
1015 | case DWC2_CONTROL_SETUP: | |
1016 | if (urb->length > 0) | |
1017 | qtd->control_phase = DWC2_CONTROL_DATA; | |
1018 | else | |
1019 | qtd->control_phase = DWC2_CONTROL_STATUS; | |
1020 | dev_vdbg(hsotg->dev, | |
1021 | " Control setup transaction done\n"); | |
1022 | halt_status = DWC2_HC_XFER_COMPLETE; | |
1023 | break; | |
1024 | case DWC2_CONTROL_DATA: | |
1025 | urb_xfer_done = dwc2_update_urb_state(hsotg, chan, | |
1026 | chnum, urb, qtd); | |
1027 | if (urb_xfer_done) { | |
1028 | qtd->control_phase = DWC2_CONTROL_STATUS; | |
1029 | dev_vdbg(hsotg->dev, | |
1030 | " Control data transfer done\n"); | |
1031 | } else { | |
1032 | dwc2_hcd_save_data_toggle(hsotg, chan, chnum, | |
1033 | qtd); | |
1034 | } | |
1035 | halt_status = DWC2_HC_XFER_COMPLETE; | |
1036 | break; | |
1037 | case DWC2_CONTROL_STATUS: | |
1038 | dev_vdbg(hsotg->dev, " Control transfer complete\n"); | |
1039 | if (urb->status == -EINPROGRESS) | |
1040 | urb->status = 0; | |
0d012b98 | 1041 | dwc2_host_complete(hsotg, qtd, urb->status); |
7359d482 PZ |
1042 | halt_status = DWC2_HC_XFER_URB_COMPLETE; |
1043 | break; | |
1044 | } | |
1045 | ||
1046 | dwc2_complete_non_periodic_xfer(hsotg, chan, chnum, qtd, | |
1047 | halt_status); | |
1048 | break; | |
1049 | case USB_ENDPOINT_XFER_BULK: | |
1050 | dev_vdbg(hsotg->dev, " Bulk transfer complete\n"); | |
1051 | urb_xfer_done = dwc2_update_urb_state(hsotg, chan, chnum, urb, | |
1052 | qtd); | |
1053 | if (urb_xfer_done) { | |
0d012b98 | 1054 | dwc2_host_complete(hsotg, qtd, urb->status); |
7359d482 PZ |
1055 | halt_status = DWC2_HC_XFER_URB_COMPLETE; |
1056 | } else { | |
1057 | halt_status = DWC2_HC_XFER_COMPLETE; | |
1058 | } | |
1059 | ||
1060 | dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd); | |
1061 | dwc2_complete_non_periodic_xfer(hsotg, chan, chnum, qtd, | |
1062 | halt_status); | |
1063 | break; | |
1064 | case USB_ENDPOINT_XFER_INT: | |
1065 | dev_vdbg(hsotg->dev, " Interrupt transfer complete\n"); | |
1066 | urb_xfer_done = dwc2_update_urb_state(hsotg, chan, chnum, urb, | |
1067 | qtd); | |
1068 | ||
1069 | /* | |
1070 | * Interrupt URB is done on the first transfer complete | |
1071 | * interrupt | |
1072 | */ | |
1073 | if (urb_xfer_done) { | |
0d012b98 PZ |
1074 | dwc2_host_complete(hsotg, qtd, urb->status); |
1075 | halt_status = DWC2_HC_XFER_URB_COMPLETE; | |
7359d482 | 1076 | } else { |
0d012b98 | 1077 | halt_status = DWC2_HC_XFER_COMPLETE; |
7359d482 PZ |
1078 | } |
1079 | ||
1080 | dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd); | |
1081 | dwc2_complete_periodic_xfer(hsotg, chan, chnum, qtd, | |
1082 | halt_status); | |
1083 | break; | |
1084 | case USB_ENDPOINT_XFER_ISOC: | |
b49977a6 MK |
1085 | if (dbg_perio()) |
1086 | dev_vdbg(hsotg->dev, " Isochronous transfer complete\n"); | |
7359d482 PZ |
1087 | if (qtd->isoc_split_pos == DWC2_HCSPLT_XACTPOS_ALL) |
1088 | halt_status = dwc2_update_isoc_urb_state(hsotg, chan, | |
1089 | chnum, qtd, DWC2_HC_XFER_COMPLETE); | |
1090 | dwc2_complete_periodic_xfer(hsotg, chan, chnum, qtd, | |
1091 | halt_status); | |
1092 | break; | |
1093 | } | |
1094 | ||
1095 | handle_xfercomp_done: | |
1096 | disable_hc_int(hsotg, chnum, HCINTMSK_XFERCOMPL); | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * Handles a host channel STALL interrupt. This handler may be called in | |
1101 | * either DMA mode or Slave mode. | |
1102 | */ | |
1103 | static void dwc2_hc_stall_intr(struct dwc2_hsotg *hsotg, | |
1104 | struct dwc2_host_chan *chan, int chnum, | |
1105 | struct dwc2_qtd *qtd) | |
1106 | { | |
1107 | struct dwc2_hcd_urb *urb = qtd->urb; | |
1108 | int pipe_type = dwc2_hcd_get_pipe_type(&urb->pipe_info); | |
1109 | ||
1110 | dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: STALL Received--\n", | |
1111 | chnum); | |
1112 | ||
1113 | if (hsotg->core_params->dma_desc_enable > 0) { | |
1114 | dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum, | |
1115 | DWC2_HC_XFER_STALL); | |
1116 | goto handle_stall_done; | |
1117 | } | |
1118 | ||
1119 | if (!urb) | |
1120 | goto handle_stall_halt; | |
1121 | ||
1122 | if (pipe_type == USB_ENDPOINT_XFER_CONTROL) | |
0d012b98 | 1123 | dwc2_host_complete(hsotg, qtd, -EPIPE); |
7359d482 PZ |
1124 | |
1125 | if (pipe_type == USB_ENDPOINT_XFER_BULK || | |
1126 | pipe_type == USB_ENDPOINT_XFER_INT) { | |
0d012b98 | 1127 | dwc2_host_complete(hsotg, qtd, -EPIPE); |
7359d482 PZ |
1128 | /* |
1129 | * USB protocol requires resetting the data toggle for bulk | |
1130 | * and interrupt endpoints when a CLEAR_FEATURE(ENDPOINT_HALT) | |
1131 | * setup command is issued to the endpoint. Anticipate the | |
1132 | * CLEAR_FEATURE command since a STALL has occurred and reset | |
1133 | * the data toggle now. | |
1134 | */ | |
1135 | chan->qh->data_toggle = 0; | |
1136 | } | |
1137 | ||
1138 | handle_stall_halt: | |
1139 | dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_STALL); | |
1140 | ||
1141 | handle_stall_done: | |
1142 | disable_hc_int(hsotg, chnum, HCINTMSK_STALL); | |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * Updates the state of the URB when a transfer has been stopped due to an | |
1147 | * abnormal condition before the transfer completes. Modifies the | |
1148 | * actual_length field of the URB to reflect the number of bytes that have | |
1149 | * actually been transferred via the host channel. | |
1150 | */ | |
1151 | static void dwc2_update_urb_state_abn(struct dwc2_hsotg *hsotg, | |
1152 | struct dwc2_host_chan *chan, int chnum, | |
1153 | struct dwc2_hcd_urb *urb, | |
1154 | struct dwc2_qtd *qtd, | |
1155 | enum dwc2_halt_status halt_status) | |
1156 | { | |
1157 | u32 xfer_length = dwc2_get_actual_xfer_length(hsotg, chan, chnum, | |
1158 | qtd, halt_status, NULL); | |
1159 | u32 hctsiz; | |
1160 | ||
1161 | if (urb->actual_length + xfer_length > urb->length) { | |
1162 | dev_warn(hsotg->dev, "%s(): trimming xfer length\n", __func__); | |
1163 | xfer_length = urb->length - urb->actual_length; | |
1164 | } | |
1165 | ||
1166 | /* Non DWORD-aligned buffer case handling */ | |
1167 | if (chan->align_buf && xfer_length && chan->ep_is_in) { | |
0cf31f86 | 1168 | dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", __func__); |
7359d482 PZ |
1169 | dma_sync_single_for_cpu(hsotg->dev, urb->dma, urb->length, |
1170 | DMA_FROM_DEVICE); | |
1171 | memcpy(urb->buf + urb->actual_length, chan->qh->dw_align_buf, | |
1172 | xfer_length); | |
1173 | dma_sync_single_for_device(hsotg->dev, urb->dma, urb->length, | |
1174 | DMA_FROM_DEVICE); | |
1175 | } | |
1176 | ||
1177 | urb->actual_length += xfer_length; | |
1178 | ||
1179 | hctsiz = readl(hsotg->regs + HCTSIZ(chnum)); | |
1180 | dev_vdbg(hsotg->dev, "DWC_otg: %s: %s, channel %d\n", | |
1181 | __func__, (chan->ep_is_in ? "IN" : "OUT"), chnum); | |
1182 | dev_vdbg(hsotg->dev, " chan->start_pkt_count %d\n", | |
1183 | chan->start_pkt_count); | |
1184 | dev_vdbg(hsotg->dev, " hctsiz.pktcnt %d\n", | |
d6ec53e0 | 1185 | (hctsiz & TSIZ_PKTCNT_MASK) >> TSIZ_PKTCNT_SHIFT); |
7359d482 PZ |
1186 | dev_vdbg(hsotg->dev, " chan->max_packet %d\n", chan->max_packet); |
1187 | dev_vdbg(hsotg->dev, " bytes_transferred %d\n", | |
1188 | xfer_length); | |
1189 | dev_vdbg(hsotg->dev, " urb->actual_length %d\n", | |
1190 | urb->actual_length); | |
1191 | dev_vdbg(hsotg->dev, " urb->transfer_buffer_length %d\n", | |
1192 | urb->length); | |
1193 | } | |
1194 | ||
1195 | /* | |
1196 | * Handles a host channel NAK interrupt. This handler may be called in either | |
1197 | * DMA mode or Slave mode. | |
1198 | */ | |
1199 | static void dwc2_hc_nak_intr(struct dwc2_hsotg *hsotg, | |
1200 | struct dwc2_host_chan *chan, int chnum, | |
1201 | struct dwc2_qtd *qtd) | |
1202 | { | |
b49977a6 MK |
1203 | if (dbg_hc(chan)) |
1204 | dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: NAK Received--\n", | |
1205 | chnum); | |
7359d482 PZ |
1206 | |
1207 | /* | |
1208 | * Handle NAK for IN/OUT SSPLIT/CSPLIT transfers, bulk, control, and | |
1209 | * interrupt. Re-start the SSPLIT transfer. | |
1210 | */ | |
1211 | if (chan->do_split) { | |
1212 | if (chan->complete_split) | |
1213 | qtd->error_count = 0; | |
1214 | qtd->complete_split = 0; | |
1215 | dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NAK); | |
1216 | goto handle_nak_done; | |
1217 | } | |
1218 | ||
1219 | switch (dwc2_hcd_get_pipe_type(&qtd->urb->pipe_info)) { | |
1220 | case USB_ENDPOINT_XFER_CONTROL: | |
1221 | case USB_ENDPOINT_XFER_BULK: | |
1222 | if (hsotg->core_params->dma_enable > 0 && chan->ep_is_in) { | |
1223 | /* | |
1224 | * NAK interrupts are enabled on bulk/control IN | |
1225 | * transfers in DMA mode for the sole purpose of | |
1226 | * resetting the error count after a transaction error | |
1227 | * occurs. The core will continue transferring data. | |
1228 | */ | |
1229 | qtd->error_count = 0; | |
1230 | break; | |
1231 | } | |
1232 | ||
1233 | /* | |
1234 | * NAK interrupts normally occur during OUT transfers in DMA | |
1235 | * or Slave mode. For IN transfers, more requests will be | |
1236 | * queued as request queue space is available. | |
1237 | */ | |
1238 | qtd->error_count = 0; | |
1239 | ||
1240 | if (!chan->qh->ping_state) { | |
1241 | dwc2_update_urb_state_abn(hsotg, chan, chnum, qtd->urb, | |
1242 | qtd, DWC2_HC_XFER_NAK); | |
1243 | dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd); | |
1244 | ||
1245 | if (chan->speed == USB_SPEED_HIGH) | |
1246 | chan->qh->ping_state = 1; | |
1247 | } | |
1248 | ||
1249 | /* | |
1250 | * Halt the channel so the transfer can be re-started from | |
1251 | * the appropriate point or the PING protocol will | |
1252 | * start/continue | |
1253 | */ | |
1254 | dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NAK); | |
1255 | break; | |
1256 | case USB_ENDPOINT_XFER_INT: | |
1257 | qtd->error_count = 0; | |
1258 | dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NAK); | |
1259 | break; | |
1260 | case USB_ENDPOINT_XFER_ISOC: | |
1261 | /* Should never get called for isochronous transfers */ | |
1262 | dev_err(hsotg->dev, "NACK interrupt for ISOC transfer\n"); | |
1263 | break; | |
1264 | } | |
1265 | ||
1266 | handle_nak_done: | |
1267 | disable_hc_int(hsotg, chnum, HCINTMSK_NAK); | |
1268 | } | |
1269 | ||
1270 | /* | |
1271 | * Handles a host channel ACK interrupt. This interrupt is enabled when | |
1272 | * performing the PING protocol in Slave mode, when errors occur during | |
1273 | * either Slave mode or DMA mode, and during Start Split transactions. | |
1274 | */ | |
1275 | static void dwc2_hc_ack_intr(struct dwc2_hsotg *hsotg, | |
1276 | struct dwc2_host_chan *chan, int chnum, | |
1277 | struct dwc2_qtd *qtd) | |
1278 | { | |
1279 | struct dwc2_hcd_iso_packet_desc *frame_desc; | |
1280 | ||
b49977a6 MK |
1281 | if (dbg_hc(chan)) |
1282 | dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: ACK Received--\n", | |
1283 | chnum); | |
7359d482 PZ |
1284 | |
1285 | if (chan->do_split) { | |
1286 | /* Handle ACK on SSPLIT. ACK should not occur in CSPLIT. */ | |
1287 | if (!chan->ep_is_in && | |
1288 | chan->data_pid_start != DWC2_HC_PID_SETUP) | |
1289 | qtd->ssplit_out_xfer_count = chan->xfer_len; | |
1290 | ||
1291 | if (chan->ep_type != USB_ENDPOINT_XFER_ISOC || chan->ep_is_in) { | |
1292 | qtd->complete_split = 1; | |
1293 | dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_ACK); | |
1294 | } else { | |
1295 | /* ISOC OUT */ | |
1296 | switch (chan->xact_pos) { | |
1297 | case DWC2_HCSPLT_XACTPOS_ALL: | |
1298 | break; | |
1299 | case DWC2_HCSPLT_XACTPOS_END: | |
1300 | qtd->isoc_split_pos = DWC2_HCSPLT_XACTPOS_ALL; | |
1301 | qtd->isoc_split_offset = 0; | |
1302 | break; | |
1303 | case DWC2_HCSPLT_XACTPOS_BEGIN: | |
1304 | case DWC2_HCSPLT_XACTPOS_MID: | |
1305 | /* | |
1306 | * For BEGIN or MID, calculate the length for | |
1307 | * the next microframe to determine the correct | |
1308 | * SSPLIT token, either MID or END | |
1309 | */ | |
1310 | frame_desc = &qtd->urb->iso_descs[ | |
1311 | qtd->isoc_frame_index]; | |
1312 | qtd->isoc_split_offset += 188; | |
1313 | ||
1314 | if (frame_desc->length - qtd->isoc_split_offset | |
1315 | <= 188) | |
1316 | qtd->isoc_split_pos = | |
1317 | DWC2_HCSPLT_XACTPOS_END; | |
1318 | else | |
1319 | qtd->isoc_split_pos = | |
1320 | DWC2_HCSPLT_XACTPOS_MID; | |
1321 | break; | |
1322 | } | |
1323 | } | |
1324 | } else { | |
1325 | qtd->error_count = 0; | |
1326 | ||
1327 | if (chan->qh->ping_state) { | |
1328 | chan->qh->ping_state = 0; | |
1329 | /* | |
1330 | * Halt the channel so the transfer can be re-started | |
1331 | * from the appropriate point. This only happens in | |
1332 | * Slave mode. In DMA mode, the ping_state is cleared | |
1333 | * when the transfer is started because the core | |
1334 | * automatically executes the PING, then the transfer. | |
1335 | */ | |
1336 | dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_ACK); | |
1337 | } | |
1338 | } | |
1339 | ||
1340 | /* | |
1341 | * If the ACK occurred when _not_ in the PING state, let the channel | |
1342 | * continue transferring data after clearing the error count | |
1343 | */ | |
1344 | disable_hc_int(hsotg, chnum, HCINTMSK_ACK); | |
1345 | } | |
1346 | ||
1347 | /* | |
1348 | * Handles a host channel NYET interrupt. This interrupt should only occur on | |
1349 | * Bulk and Control OUT endpoints and for complete split transactions. If a | |
1350 | * NYET occurs at the same time as a Transfer Complete interrupt, it is | |
1351 | * handled in the xfercomp interrupt handler, not here. This handler may be | |
1352 | * called in either DMA mode or Slave mode. | |
1353 | */ | |
1354 | static void dwc2_hc_nyet_intr(struct dwc2_hsotg *hsotg, | |
1355 | struct dwc2_host_chan *chan, int chnum, | |
1356 | struct dwc2_qtd *qtd) | |
1357 | { | |
b49977a6 MK |
1358 | if (dbg_hc(chan)) |
1359 | dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: NYET Received--\n", | |
1360 | chnum); | |
7359d482 PZ |
1361 | |
1362 | /* | |
1363 | * NYET on CSPLIT | |
1364 | * re-do the CSPLIT immediately on non-periodic | |
1365 | */ | |
1366 | if (chan->do_split && chan->complete_split) { | |
1367 | if (chan->ep_is_in && chan->ep_type == USB_ENDPOINT_XFER_ISOC && | |
1368 | hsotg->core_params->dma_enable > 0) { | |
1369 | qtd->complete_split = 0; | |
1370 | qtd->isoc_split_offset = 0; | |
0d012b98 | 1371 | qtd->isoc_frame_index++; |
7902c16b | 1372 | if (qtd->urb && |
0d012b98 PZ |
1373 | qtd->isoc_frame_index == qtd->urb->packet_count) { |
1374 | dwc2_host_complete(hsotg, qtd, 0); | |
7359d482 | 1375 | dwc2_release_channel(hsotg, chan, qtd, |
7902c16b | 1376 | DWC2_HC_XFER_URB_COMPLETE); |
7359d482 PZ |
1377 | } else { |
1378 | dwc2_release_channel(hsotg, chan, qtd, | |
1379 | DWC2_HC_XFER_NO_HALT_STATUS); | |
1380 | } | |
1381 | goto handle_nyet_done; | |
1382 | } | |
1383 | ||
1384 | if (chan->ep_type == USB_ENDPOINT_XFER_INT || | |
1385 | chan->ep_type == USB_ENDPOINT_XFER_ISOC) { | |
1386 | int frnum = dwc2_hcd_get_frame_number(hsotg); | |
1387 | ||
1388 | if (dwc2_full_frame_num(frnum) != | |
1389 | dwc2_full_frame_num(chan->qh->sched_frame)) { | |
1390 | /* | |
1391 | * No longer in the same full speed frame. | |
1392 | * Treat this as a transaction error. | |
1393 | */ | |
1394 | #if 0 | |
1395 | /* | |
1396 | * Todo: Fix system performance so this can | |
1397 | * be treated as an error. Right now complete | |
1398 | * splits cannot be scheduled precisely enough | |
1399 | * due to other system activity, so this error | |
1400 | * occurs regularly in Slave mode. | |
1401 | */ | |
1402 | qtd->error_count++; | |
1403 | #endif | |
1404 | qtd->complete_split = 0; | |
1405 | dwc2_halt_channel(hsotg, chan, qtd, | |
1406 | DWC2_HC_XFER_XACT_ERR); | |
1407 | /* Todo: add support for isoc release */ | |
1408 | goto handle_nyet_done; | |
1409 | } | |
1410 | } | |
1411 | ||
1412 | dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NYET); | |
1413 | goto handle_nyet_done; | |
1414 | } | |
1415 | ||
1416 | chan->qh->ping_state = 1; | |
1417 | qtd->error_count = 0; | |
1418 | ||
1419 | dwc2_update_urb_state_abn(hsotg, chan, chnum, qtd->urb, qtd, | |
1420 | DWC2_HC_XFER_NYET); | |
1421 | dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd); | |
1422 | ||
1423 | /* | |
1424 | * Halt the channel and re-start the transfer so the PING protocol | |
1425 | * will start | |
1426 | */ | |
1427 | dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NYET); | |
1428 | ||
1429 | handle_nyet_done: | |
1430 | disable_hc_int(hsotg, chnum, HCINTMSK_NYET); | |
1431 | } | |
1432 | ||
1433 | /* | |
1434 | * Handles a host channel babble interrupt. This handler may be called in | |
1435 | * either DMA mode or Slave mode. | |
1436 | */ | |
1437 | static void dwc2_hc_babble_intr(struct dwc2_hsotg *hsotg, | |
1438 | struct dwc2_host_chan *chan, int chnum, | |
1439 | struct dwc2_qtd *qtd) | |
1440 | { | |
1441 | dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: Babble Error--\n", | |
1442 | chnum); | |
1443 | ||
0d012b98 PZ |
1444 | dwc2_hc_handle_tt_clear(hsotg, chan, qtd); |
1445 | ||
7359d482 PZ |
1446 | if (hsotg->core_params->dma_desc_enable > 0) { |
1447 | dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum, | |
1448 | DWC2_HC_XFER_BABBLE_ERR); | |
0d012b98 | 1449 | goto disable_int; |
7359d482 PZ |
1450 | } |
1451 | ||
1452 | if (chan->ep_type != USB_ENDPOINT_XFER_ISOC) { | |
0d012b98 | 1453 | dwc2_host_complete(hsotg, qtd, -EOVERFLOW); |
7359d482 PZ |
1454 | dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_BABBLE_ERR); |
1455 | } else { | |
1456 | enum dwc2_halt_status halt_status; | |
1457 | ||
1458 | halt_status = dwc2_update_isoc_urb_state(hsotg, chan, chnum, | |
1459 | qtd, DWC2_HC_XFER_BABBLE_ERR); | |
1460 | dwc2_halt_channel(hsotg, chan, qtd, halt_status); | |
1461 | } | |
1462 | ||
0d012b98 | 1463 | disable_int: |
7359d482 PZ |
1464 | disable_hc_int(hsotg, chnum, HCINTMSK_BBLERR); |
1465 | } | |
1466 | ||
1467 | /* | |
1468 | * Handles a host channel AHB error interrupt. This handler is only called in | |
1469 | * DMA mode. | |
1470 | */ | |
1471 | static void dwc2_hc_ahberr_intr(struct dwc2_hsotg *hsotg, | |
1472 | struct dwc2_host_chan *chan, int chnum, | |
1473 | struct dwc2_qtd *qtd) | |
1474 | { | |
1475 | struct dwc2_hcd_urb *urb = qtd->urb; | |
1476 | char *pipetype, *speed; | |
1477 | u32 hcchar; | |
1478 | u32 hcsplt; | |
1479 | u32 hctsiz; | |
1480 | u32 hc_dma; | |
1481 | ||
1482 | dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: AHB Error--\n", | |
1483 | chnum); | |
1484 | ||
1485 | if (!urb) | |
1486 | goto handle_ahberr_halt; | |
1487 | ||
0d012b98 PZ |
1488 | dwc2_hc_handle_tt_clear(hsotg, chan, qtd); |
1489 | ||
7359d482 PZ |
1490 | hcchar = readl(hsotg->regs + HCCHAR(chnum)); |
1491 | hcsplt = readl(hsotg->regs + HCSPLT(chnum)); | |
1492 | hctsiz = readl(hsotg->regs + HCTSIZ(chnum)); | |
1493 | hc_dma = readl(hsotg->regs + HCDMA(chnum)); | |
1494 | ||
1495 | dev_err(hsotg->dev, "AHB ERROR, Channel %d\n", chnum); | |
1496 | dev_err(hsotg->dev, " hcchar 0x%08x, hcsplt 0x%08x\n", hcchar, hcsplt); | |
1497 | dev_err(hsotg->dev, " hctsiz 0x%08x, hc_dma 0x%08x\n", hctsiz, hc_dma); | |
1498 | dev_err(hsotg->dev, " Device address: %d\n", | |
1499 | dwc2_hcd_get_dev_addr(&urb->pipe_info)); | |
1500 | dev_err(hsotg->dev, " Endpoint: %d, %s\n", | |
1501 | dwc2_hcd_get_ep_num(&urb->pipe_info), | |
1502 | dwc2_hcd_is_pipe_in(&urb->pipe_info) ? "IN" : "OUT"); | |
1503 | ||
1504 | switch (dwc2_hcd_get_pipe_type(&urb->pipe_info)) { | |
1505 | case USB_ENDPOINT_XFER_CONTROL: | |
1506 | pipetype = "CONTROL"; | |
1507 | break; | |
1508 | case USB_ENDPOINT_XFER_BULK: | |
1509 | pipetype = "BULK"; | |
1510 | break; | |
1511 | case USB_ENDPOINT_XFER_INT: | |
1512 | pipetype = "INTERRUPT"; | |
1513 | break; | |
1514 | case USB_ENDPOINT_XFER_ISOC: | |
1515 | pipetype = "ISOCHRONOUS"; | |
1516 | break; | |
1517 | default: | |
1518 | pipetype = "UNKNOWN"; | |
1519 | break; | |
1520 | } | |
1521 | ||
1522 | dev_err(hsotg->dev, " Endpoint type: %s\n", pipetype); | |
1523 | ||
1524 | switch (chan->speed) { | |
1525 | case USB_SPEED_HIGH: | |
1526 | speed = "HIGH"; | |
1527 | break; | |
1528 | case USB_SPEED_FULL: | |
1529 | speed = "FULL"; | |
1530 | break; | |
1531 | case USB_SPEED_LOW: | |
1532 | speed = "LOW"; | |
1533 | break; | |
1534 | default: | |
1535 | speed = "UNKNOWN"; | |
1536 | break; | |
1537 | } | |
1538 | ||
1539 | dev_err(hsotg->dev, " Speed: %s\n", speed); | |
1540 | ||
1541 | dev_err(hsotg->dev, " Max packet size: %d\n", | |
1542 | dwc2_hcd_get_mps(&urb->pipe_info)); | |
1543 | dev_err(hsotg->dev, " Data buffer length: %d\n", urb->length); | |
157dfaac PZ |
1544 | dev_err(hsotg->dev, " Transfer buffer: %p, Transfer DMA: %08lx\n", |
1545 | urb->buf, (unsigned long)urb->dma); | |
1546 | dev_err(hsotg->dev, " Setup buffer: %p, Setup DMA: %08lx\n", | |
1547 | urb->setup_packet, (unsigned long)urb->setup_dma); | |
7359d482 PZ |
1548 | dev_err(hsotg->dev, " Interval: %d\n", urb->interval); |
1549 | ||
1550 | /* Core halts the channel for Descriptor DMA mode */ | |
1551 | if (hsotg->core_params->dma_desc_enable > 0) { | |
1552 | dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum, | |
1553 | DWC2_HC_XFER_AHB_ERR); | |
1554 | goto handle_ahberr_done; | |
1555 | } | |
1556 | ||
0d012b98 | 1557 | dwc2_host_complete(hsotg, qtd, -EIO); |
7359d482 PZ |
1558 | |
1559 | handle_ahberr_halt: | |
1560 | /* | |
1561 | * Force a channel halt. Don't call dwc2_halt_channel because that won't | |
1562 | * write to the HCCHARn register in DMA mode to force the halt. | |
1563 | */ | |
1564 | dwc2_hc_halt(hsotg, chan, DWC2_HC_XFER_AHB_ERR); | |
1565 | ||
1566 | handle_ahberr_done: | |
7359d482 PZ |
1567 | disable_hc_int(hsotg, chnum, HCINTMSK_AHBERR); |
1568 | } | |
1569 | ||
1570 | /* | |
1571 | * Handles a host channel transaction error interrupt. This handler may be | |
1572 | * called in either DMA mode or Slave mode. | |
1573 | */ | |
1574 | static void dwc2_hc_xacterr_intr(struct dwc2_hsotg *hsotg, | |
1575 | struct dwc2_host_chan *chan, int chnum, | |
1576 | struct dwc2_qtd *qtd) | |
1577 | { | |
1578 | dev_dbg(hsotg->dev, | |
1579 | "--Host Channel %d Interrupt: Transaction Error--\n", chnum); | |
1580 | ||
0d012b98 PZ |
1581 | dwc2_hc_handle_tt_clear(hsotg, chan, qtd); |
1582 | ||
7359d482 PZ |
1583 | if (hsotg->core_params->dma_desc_enable > 0) { |
1584 | dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum, | |
1585 | DWC2_HC_XFER_XACT_ERR); | |
1586 | goto handle_xacterr_done; | |
1587 | } | |
1588 | ||
1589 | switch (dwc2_hcd_get_pipe_type(&qtd->urb->pipe_info)) { | |
1590 | case USB_ENDPOINT_XFER_CONTROL: | |
1591 | case USB_ENDPOINT_XFER_BULK: | |
1592 | qtd->error_count++; | |
1593 | if (!chan->qh->ping_state) { | |
1594 | ||
1595 | dwc2_update_urb_state_abn(hsotg, chan, chnum, qtd->urb, | |
1596 | qtd, DWC2_HC_XFER_XACT_ERR); | |
1597 | dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd); | |
1598 | if (!chan->ep_is_in && chan->speed == USB_SPEED_HIGH) | |
1599 | chan->qh->ping_state = 1; | |
1600 | } | |
1601 | ||
1602 | /* | |
1603 | * Halt the channel so the transfer can be re-started from | |
1604 | * the appropriate point or the PING protocol will start | |
1605 | */ | |
1606 | dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_XACT_ERR); | |
1607 | break; | |
1608 | case USB_ENDPOINT_XFER_INT: | |
1609 | qtd->error_count++; | |
1610 | if (chan->do_split && chan->complete_split) | |
1611 | qtd->complete_split = 0; | |
1612 | dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_XACT_ERR); | |
1613 | break; | |
1614 | case USB_ENDPOINT_XFER_ISOC: | |
1615 | { | |
1616 | enum dwc2_halt_status halt_status; | |
1617 | ||
1618 | halt_status = dwc2_update_isoc_urb_state(hsotg, chan, | |
1619 | chnum, qtd, DWC2_HC_XFER_XACT_ERR); | |
1620 | dwc2_halt_channel(hsotg, chan, qtd, halt_status); | |
1621 | } | |
1622 | break; | |
1623 | } | |
1624 | ||
1625 | handle_xacterr_done: | |
7359d482 PZ |
1626 | disable_hc_int(hsotg, chnum, HCINTMSK_XACTERR); |
1627 | } | |
1628 | ||
1629 | /* | |
1630 | * Handles a host channel frame overrun interrupt. This handler may be called | |
1631 | * in either DMA mode or Slave mode. | |
1632 | */ | |
1633 | static void dwc2_hc_frmovrun_intr(struct dwc2_hsotg *hsotg, | |
1634 | struct dwc2_host_chan *chan, int chnum, | |
1635 | struct dwc2_qtd *qtd) | |
1636 | { | |
1637 | enum dwc2_halt_status halt_status; | |
1638 | ||
b49977a6 MK |
1639 | if (dbg_hc(chan)) |
1640 | dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: Frame Overrun--\n", | |
1641 | chnum); | |
7359d482 | 1642 | |
0d012b98 PZ |
1643 | dwc2_hc_handle_tt_clear(hsotg, chan, qtd); |
1644 | ||
7359d482 PZ |
1645 | switch (dwc2_hcd_get_pipe_type(&qtd->urb->pipe_info)) { |
1646 | case USB_ENDPOINT_XFER_CONTROL: | |
1647 | case USB_ENDPOINT_XFER_BULK: | |
1648 | break; | |
1649 | case USB_ENDPOINT_XFER_INT: | |
1650 | dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_FRAME_OVERRUN); | |
1651 | break; | |
1652 | case USB_ENDPOINT_XFER_ISOC: | |
1653 | halt_status = dwc2_update_isoc_urb_state(hsotg, chan, chnum, | |
1654 | qtd, DWC2_HC_XFER_FRAME_OVERRUN); | |
1655 | dwc2_halt_channel(hsotg, chan, qtd, halt_status); | |
1656 | break; | |
1657 | } | |
1658 | ||
7359d482 PZ |
1659 | disable_hc_int(hsotg, chnum, HCINTMSK_FRMOVRUN); |
1660 | } | |
1661 | ||
1662 | /* | |
1663 | * Handles a host channel data toggle error interrupt. This handler may be | |
1664 | * called in either DMA mode or Slave mode. | |
1665 | */ | |
1666 | static void dwc2_hc_datatglerr_intr(struct dwc2_hsotg *hsotg, | |
1667 | struct dwc2_host_chan *chan, int chnum, | |
1668 | struct dwc2_qtd *qtd) | |
1669 | { | |
1670 | dev_dbg(hsotg->dev, | |
1671 | "--Host Channel %d Interrupt: Data Toggle Error--\n", chnum); | |
1672 | ||
1673 | if (chan->ep_is_in) | |
1674 | qtd->error_count = 0; | |
1675 | else | |
1676 | dev_err(hsotg->dev, | |
1677 | "Data Toggle Error on OUT transfer, channel %d\n", | |
1678 | chnum); | |
1679 | ||
1680 | dwc2_hc_handle_tt_clear(hsotg, chan, qtd); | |
1681 | disable_hc_int(hsotg, chnum, HCINTMSK_DATATGLERR); | |
1682 | } | |
1683 | ||
1684 | /* | |
1685 | * For debug only. It checks that a valid halt status is set and that | |
1686 | * HCCHARn.chdis is clear. If there's a problem, corrective action is | |
1687 | * taken and a warning is issued. | |
1688 | * | |
1689 | * Return: true if halt status is ok, false otherwise | |
1690 | */ | |
1691 | static bool dwc2_halt_status_ok(struct dwc2_hsotg *hsotg, | |
1692 | struct dwc2_host_chan *chan, int chnum, | |
1693 | struct dwc2_qtd *qtd) | |
1694 | { | |
1695 | #ifdef DEBUG | |
1696 | u32 hcchar; | |
1697 | u32 hctsiz; | |
1698 | u32 hcintmsk; | |
1699 | u32 hcsplt; | |
1700 | ||
1701 | if (chan->halt_status == DWC2_HC_XFER_NO_HALT_STATUS) { | |
1702 | /* | |
1703 | * This code is here only as a check. This condition should | |
1704 | * never happen. Ignore the halt if it does occur. | |
1705 | */ | |
1706 | hcchar = readl(hsotg->regs + HCCHAR(chnum)); | |
1707 | hctsiz = readl(hsotg->regs + HCTSIZ(chnum)); | |
1708 | hcintmsk = readl(hsotg->regs + HCINTMSK(chnum)); | |
1709 | hcsplt = readl(hsotg->regs + HCSPLT(chnum)); | |
1710 | dev_dbg(hsotg->dev, | |
1711 | "%s: chan->halt_status DWC2_HC_XFER_NO_HALT_STATUS,\n", | |
1712 | __func__); | |
1713 | dev_dbg(hsotg->dev, | |
1714 | "channel %d, hcchar 0x%08x, hctsiz 0x%08x,\n", | |
1715 | chnum, hcchar, hctsiz); | |
1716 | dev_dbg(hsotg->dev, | |
1717 | "hcint 0x%08x, hcintmsk 0x%08x, hcsplt 0x%08x,\n", | |
1718 | chan->hcint, hcintmsk, hcsplt); | |
8509f2f4 MK |
1719 | if (qtd) |
1720 | dev_dbg(hsotg->dev, "qtd->complete_split %d\n", | |
1721 | qtd->complete_split); | |
7359d482 PZ |
1722 | dev_warn(hsotg->dev, |
1723 | "%s: no halt status, channel %d, ignoring interrupt\n", | |
1724 | __func__, chnum); | |
1725 | return false; | |
1726 | } | |
1727 | ||
1728 | /* | |
1729 | * This code is here only as a check. hcchar.chdis should never be set | |
1730 | * when the halt interrupt occurs. Halt the channel again if it does | |
1731 | * occur. | |
1732 | */ | |
1733 | hcchar = readl(hsotg->regs + HCCHAR(chnum)); | |
1734 | if (hcchar & HCCHAR_CHDIS) { | |
1735 | dev_warn(hsotg->dev, | |
1736 | "%s: hcchar.chdis set unexpectedly, hcchar 0x%08x, trying to halt again\n", | |
1737 | __func__, hcchar); | |
1738 | chan->halt_pending = 0; | |
1739 | dwc2_halt_channel(hsotg, chan, qtd, chan->halt_status); | |
1740 | return false; | |
1741 | } | |
1742 | #endif | |
1743 | ||
1744 | return true; | |
1745 | } | |
1746 | ||
1747 | /* | |
1748 | * Handles a host Channel Halted interrupt in DMA mode. This handler | |
1749 | * determines the reason the channel halted and proceeds accordingly. | |
1750 | */ | |
1751 | static void dwc2_hc_chhltd_intr_dma(struct dwc2_hsotg *hsotg, | |
1752 | struct dwc2_host_chan *chan, int chnum, | |
1753 | struct dwc2_qtd *qtd) | |
1754 | { | |
1755 | u32 hcintmsk; | |
1756 | int out_nak_enh = 0; | |
1757 | ||
b49977a6 MK |
1758 | if (dbg_hc(chan)) |
1759 | dev_vdbg(hsotg->dev, | |
1760 | "--Host Channel %d Interrupt: DMA Channel Halted--\n", | |
1761 | chnum); | |
7359d482 PZ |
1762 | |
1763 | /* | |
1764 | * For core with OUT NAK enhancement, the flow for high-speed | |
1765 | * CONTROL/BULK OUT is handled a little differently | |
1766 | */ | |
9badec2f | 1767 | if (hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_71a) { |
7359d482 PZ |
1768 | if (chan->speed == USB_SPEED_HIGH && !chan->ep_is_in && |
1769 | (chan->ep_type == USB_ENDPOINT_XFER_CONTROL || | |
1770 | chan->ep_type == USB_ENDPOINT_XFER_BULK)) { | |
1771 | out_nak_enh = 1; | |
1772 | } | |
1773 | } | |
1774 | ||
1775 | if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE || | |
1776 | (chan->halt_status == DWC2_HC_XFER_AHB_ERR && | |
1777 | hsotg->core_params->dma_desc_enable <= 0)) { | |
1778 | if (hsotg->core_params->dma_desc_enable > 0) | |
1779 | dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum, | |
1780 | chan->halt_status); | |
1781 | else | |
1782 | /* | |
1783 | * Just release the channel. A dequeue can happen on a | |
1784 | * transfer timeout. In the case of an AHB Error, the | |
1785 | * channel was forced to halt because there's no way to | |
1786 | * gracefully recover. | |
1787 | */ | |
1788 | dwc2_release_channel(hsotg, chan, qtd, | |
1789 | chan->halt_status); | |
1790 | return; | |
1791 | } | |
1792 | ||
1793 | hcintmsk = readl(hsotg->regs + HCINTMSK(chnum)); | |
1794 | ||
1795 | if (chan->hcint & HCINTMSK_XFERCOMPL) { | |
1796 | /* | |
1797 | * Todo: This is here because of a possible hardware bug. Spec | |
1798 | * says that on SPLIT-ISOC OUT transfers in DMA mode that a HALT | |
1799 | * interrupt w/ACK bit set should occur, but I only see the | |
1800 | * XFERCOMP bit, even with it masked out. This is a workaround | |
1801 | * for that behavior. Should fix this when hardware is fixed. | |
1802 | */ | |
1803 | if (chan->ep_type == USB_ENDPOINT_XFER_ISOC && !chan->ep_is_in) | |
1804 | dwc2_hc_ack_intr(hsotg, chan, chnum, qtd); | |
1805 | dwc2_hc_xfercomp_intr(hsotg, chan, chnum, qtd); | |
1806 | } else if (chan->hcint & HCINTMSK_STALL) { | |
1807 | dwc2_hc_stall_intr(hsotg, chan, chnum, qtd); | |
1808 | } else if ((chan->hcint & HCINTMSK_XACTERR) && | |
1809 | hsotg->core_params->dma_desc_enable <= 0) { | |
1810 | if (out_nak_enh) { | |
1811 | if (chan->hcint & | |
1812 | (HCINTMSK_NYET | HCINTMSK_NAK | HCINTMSK_ACK)) { | |
1813 | dev_vdbg(hsotg->dev, | |
1814 | "XactErr with NYET/NAK/ACK\n"); | |
1815 | qtd->error_count = 0; | |
1816 | } else { | |
1817 | dev_vdbg(hsotg->dev, | |
1818 | "XactErr without NYET/NAK/ACK\n"); | |
1819 | } | |
1820 | } | |
1821 | ||
1822 | /* | |
1823 | * Must handle xacterr before nak or ack. Could get a xacterr | |
1824 | * at the same time as either of these on a BULK/CONTROL OUT | |
1825 | * that started with a PING. The xacterr takes precedence. | |
1826 | */ | |
1827 | dwc2_hc_xacterr_intr(hsotg, chan, chnum, qtd); | |
1828 | } else if ((chan->hcint & HCINTMSK_XCS_XACT) && | |
1829 | hsotg->core_params->dma_desc_enable > 0) { | |
1830 | dwc2_hc_xacterr_intr(hsotg, chan, chnum, qtd); | |
1831 | } else if ((chan->hcint & HCINTMSK_AHBERR) && | |
1832 | hsotg->core_params->dma_desc_enable > 0) { | |
1833 | dwc2_hc_ahberr_intr(hsotg, chan, chnum, qtd); | |
1834 | } else if (chan->hcint & HCINTMSK_BBLERR) { | |
1835 | dwc2_hc_babble_intr(hsotg, chan, chnum, qtd); | |
1836 | } else if (chan->hcint & HCINTMSK_FRMOVRUN) { | |
1837 | dwc2_hc_frmovrun_intr(hsotg, chan, chnum, qtd); | |
1838 | } else if (!out_nak_enh) { | |
1839 | if (chan->hcint & HCINTMSK_NYET) { | |
1840 | /* | |
1841 | * Must handle nyet before nak or ack. Could get a nyet | |
1842 | * at the same time as either of those on a BULK/CONTROL | |
1843 | * OUT that started with a PING. The nyet takes | |
1844 | * precedence. | |
1845 | */ | |
1846 | dwc2_hc_nyet_intr(hsotg, chan, chnum, qtd); | |
1847 | } else if ((chan->hcint & HCINTMSK_NAK) && | |
1848 | !(hcintmsk & HCINTMSK_NAK)) { | |
1849 | /* | |
1850 | * If nak is not masked, it's because a non-split IN | |
1851 | * transfer is in an error state. In that case, the nak | |
1852 | * is handled by the nak interrupt handler, not here. | |
1853 | * Handle nak here for BULK/CONTROL OUT transfers, which | |
1854 | * halt on a NAK to allow rewinding the buffer pointer. | |
1855 | */ | |
1856 | dwc2_hc_nak_intr(hsotg, chan, chnum, qtd); | |
1857 | } else if ((chan->hcint & HCINTMSK_ACK) && | |
1858 | !(hcintmsk & HCINTMSK_ACK)) { | |
1859 | /* | |
1860 | * If ack is not masked, it's because a non-split IN | |
1861 | * transfer is in an error state. In that case, the ack | |
1862 | * is handled by the ack interrupt handler, not here. | |
1863 | * Handle ack here for split transfers. Start splits | |
1864 | * halt on ACK. | |
1865 | */ | |
1866 | dwc2_hc_ack_intr(hsotg, chan, chnum, qtd); | |
1867 | } else { | |
1868 | if (chan->ep_type == USB_ENDPOINT_XFER_INT || | |
1869 | chan->ep_type == USB_ENDPOINT_XFER_ISOC) { | |
1870 | /* | |
1871 | * A periodic transfer halted with no other | |
1872 | * channel interrupts set. Assume it was halted | |
1873 | * by the core because it could not be completed | |
1874 | * in its scheduled (micro)frame. | |
1875 | */ | |
1876 | dev_dbg(hsotg->dev, | |
1877 | "%s: Halt channel %d (assume incomplete periodic transfer)\n", | |
1878 | __func__, chnum); | |
1879 | dwc2_halt_channel(hsotg, chan, qtd, | |
1880 | DWC2_HC_XFER_PERIODIC_INCOMPLETE); | |
1881 | } else { | |
1882 | dev_err(hsotg->dev, | |
1883 | "%s: Channel %d - ChHltd set, but reason is unknown\n", | |
1884 | __func__, chnum); | |
1885 | dev_err(hsotg->dev, | |
1886 | "hcint 0x%08x, intsts 0x%08x\n", | |
1887 | chan->hcint, | |
1888 | readl(hsotg->regs + GINTSTS)); | |
1889 | } | |
1890 | } | |
1891 | } else { | |
1892 | dev_info(hsotg->dev, | |
1893 | "NYET/NAK/ACK/other in non-error case, 0x%08x\n", | |
1894 | chan->hcint); | |
1895 | } | |
1896 | } | |
1897 | ||
1898 | /* | |
1899 | * Handles a host channel Channel Halted interrupt | |
1900 | * | |
1901 | * In slave mode, this handler is called only when the driver specifically | |
1902 | * requests a halt. This occurs during handling other host channel interrupts | |
1903 | * (e.g. nak, xacterr, stall, nyet, etc.). | |
1904 | * | |
1905 | * In DMA mode, this is the interrupt that occurs when the core has finished | |
1906 | * processing a transfer on a channel. Other host channel interrupts (except | |
1907 | * ahberr) are disabled in DMA mode. | |
1908 | */ | |
1909 | static void dwc2_hc_chhltd_intr(struct dwc2_hsotg *hsotg, | |
1910 | struct dwc2_host_chan *chan, int chnum, | |
1911 | struct dwc2_qtd *qtd) | |
1912 | { | |
b49977a6 MK |
1913 | if (dbg_hc(chan)) |
1914 | dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: Channel Halted--\n", | |
1915 | chnum); | |
7359d482 PZ |
1916 | |
1917 | if (hsotg->core_params->dma_enable > 0) { | |
1918 | dwc2_hc_chhltd_intr_dma(hsotg, chan, chnum, qtd); | |
1919 | } else { | |
1920 | if (!dwc2_halt_status_ok(hsotg, chan, chnum, qtd)) | |
1921 | return; | |
1922 | dwc2_release_channel(hsotg, chan, qtd, chan->halt_status); | |
1923 | } | |
1924 | } | |
1925 | ||
1926 | /* Handles interrupt for a specific Host Channel */ | |
1927 | static void dwc2_hc_n_intr(struct dwc2_hsotg *hsotg, int chnum) | |
1928 | { | |
1929 | struct dwc2_qtd *qtd; | |
1930 | struct dwc2_host_chan *chan; | |
1931 | u32 hcint, hcintmsk; | |
1932 | ||
b49977a6 MK |
1933 | chan = hsotg->hc_ptr_array[chnum]; |
1934 | ||
7359d482 PZ |
1935 | hcint = readl(hsotg->regs + HCINT(chnum)); |
1936 | hcintmsk = readl(hsotg->regs + HCINTMSK(chnum)); | |
7359d482 PZ |
1937 | if (!chan) { |
1938 | dev_err(hsotg->dev, "## hc_ptr_array for channel is NULL ##\n"); | |
1939 | writel(hcint, hsotg->regs + HCINT(chnum)); | |
1940 | return; | |
1941 | } | |
1942 | ||
723a2311 RK |
1943 | if (dbg_hc(chan)) { |
1944 | dev_vdbg(hsotg->dev, "--Host Channel Interrupt--, Channel %d\n", | |
1945 | chnum); | |
1946 | dev_vdbg(hsotg->dev, | |
1947 | " hcint 0x%08x, hcintmsk 0x%08x, hcint&hcintmsk 0x%08x\n", | |
1948 | hcint, hcintmsk, hcint & hcintmsk); | |
1949 | } | |
1950 | ||
7359d482 PZ |
1951 | writel(hcint, hsotg->regs + HCINT(chnum)); |
1952 | chan->hcint = hcint; | |
1953 | hcint &= hcintmsk; | |
1954 | ||
8509f2f4 MK |
1955 | /* |
1956 | * If the channel was halted due to a dequeue, the qtd list might | |
1957 | * be empty or at least the first entry will not be the active qtd. | |
1958 | * In this case, take a shortcut and just release the channel. | |
1959 | */ | |
1960 | if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE) { | |
1961 | /* | |
1962 | * If the channel was halted, this should be the only | |
1963 | * interrupt unmasked | |
1964 | */ | |
1965 | WARN_ON(hcint != HCINTMSK_CHHLTD); | |
1966 | if (hsotg->core_params->dma_desc_enable > 0) | |
1967 | dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum, | |
1968 | chan->halt_status); | |
1969 | else | |
1970 | dwc2_release_channel(hsotg, chan, NULL, | |
1971 | chan->halt_status); | |
1972 | return; | |
1973 | } | |
1974 | ||
7359d482 | 1975 | if (list_empty(&chan->qh->qtd_list)) { |
8509f2f4 MK |
1976 | /* |
1977 | * TODO: Will this ever happen with the | |
1978 | * DWC2_HC_XFER_URB_DEQUEUE handling above? | |
1979 | */ | |
7359d482 PZ |
1980 | dev_dbg(hsotg->dev, "## no QTD queued for channel %d ##\n", |
1981 | chnum); | |
1982 | dev_dbg(hsotg->dev, | |
1983 | " hcint 0x%08x, hcintmsk 0x%08x, hcint&hcintmsk 0x%08x\n", | |
1984 | chan->hcint, hcintmsk, hcint); | |
1985 | chan->halt_status = DWC2_HC_XFER_NO_HALT_STATUS; | |
1986 | disable_hc_int(hsotg, chnum, HCINTMSK_CHHLTD); | |
1987 | chan->hcint = 0; | |
1988 | return; | |
1989 | } | |
1990 | ||
1991 | qtd = list_first_entry(&chan->qh->qtd_list, struct dwc2_qtd, | |
1992 | qtd_list_entry); | |
1993 | ||
1994 | if (hsotg->core_params->dma_enable <= 0) { | |
1995 | if ((hcint & HCINTMSK_CHHLTD) && hcint != HCINTMSK_CHHLTD) | |
1996 | hcint &= ~HCINTMSK_CHHLTD; | |
1997 | } | |
1998 | ||
1999 | if (hcint & HCINTMSK_XFERCOMPL) { | |
2000 | dwc2_hc_xfercomp_intr(hsotg, chan, chnum, qtd); | |
2001 | /* | |
2002 | * If NYET occurred at same time as Xfer Complete, the NYET is | |
2003 | * handled by the Xfer Complete interrupt handler. Don't want | |
2004 | * to call the NYET interrupt handler in this case. | |
2005 | */ | |
2006 | hcint &= ~HCINTMSK_NYET; | |
2007 | } | |
2008 | if (hcint & HCINTMSK_CHHLTD) | |
2009 | dwc2_hc_chhltd_intr(hsotg, chan, chnum, qtd); | |
2010 | if (hcint & HCINTMSK_AHBERR) | |
2011 | dwc2_hc_ahberr_intr(hsotg, chan, chnum, qtd); | |
2012 | if (hcint & HCINTMSK_STALL) | |
2013 | dwc2_hc_stall_intr(hsotg, chan, chnum, qtd); | |
2014 | if (hcint & HCINTMSK_NAK) | |
2015 | dwc2_hc_nak_intr(hsotg, chan, chnum, qtd); | |
2016 | if (hcint & HCINTMSK_ACK) | |
2017 | dwc2_hc_ack_intr(hsotg, chan, chnum, qtd); | |
2018 | if (hcint & HCINTMSK_NYET) | |
2019 | dwc2_hc_nyet_intr(hsotg, chan, chnum, qtd); | |
2020 | if (hcint & HCINTMSK_XACTERR) | |
2021 | dwc2_hc_xacterr_intr(hsotg, chan, chnum, qtd); | |
2022 | if (hcint & HCINTMSK_BBLERR) | |
2023 | dwc2_hc_babble_intr(hsotg, chan, chnum, qtd); | |
2024 | if (hcint & HCINTMSK_FRMOVRUN) | |
2025 | dwc2_hc_frmovrun_intr(hsotg, chan, chnum, qtd); | |
2026 | if (hcint & HCINTMSK_DATATGLERR) | |
2027 | dwc2_hc_datatglerr_intr(hsotg, chan, chnum, qtd); | |
2028 | ||
2029 | chan->hcint = 0; | |
2030 | } | |
2031 | ||
2032 | /* | |
2033 | * This interrupt indicates that one or more host channels has a pending | |
2034 | * interrupt. There are multiple conditions that can cause each host channel | |
2035 | * interrupt. This function determines which conditions have occurred for each | |
2036 | * host channel interrupt and handles them appropriately. | |
2037 | */ | |
2038 | static void dwc2_hc_intr(struct dwc2_hsotg *hsotg) | |
2039 | { | |
2040 | u32 haint; | |
2041 | int i; | |
2042 | ||
7359d482 | 2043 | haint = readl(hsotg->regs + HAINT); |
b49977a6 MK |
2044 | if (dbg_perio()) { |
2045 | dev_vdbg(hsotg->dev, "%s()\n", __func__); | |
2046 | ||
2047 | dev_vdbg(hsotg->dev, "HAINT=%08x\n", haint); | |
2048 | } | |
7359d482 PZ |
2049 | |
2050 | for (i = 0; i < hsotg->core_params->host_channels; i++) { | |
2051 | if (haint & (1 << i)) | |
2052 | dwc2_hc_n_intr(hsotg, i); | |
2053 | } | |
2054 | } | |
2055 | ||
2056 | /* This function handles interrupts for the HCD */ | |
ca18f4a6 | 2057 | irqreturn_t dwc2_handle_hcd_intr(struct dwc2_hsotg *hsotg) |
7359d482 | 2058 | { |
b49977a6 | 2059 | u32 gintsts, dbg_gintsts; |
6aafb003 | 2060 | irqreturn_t retval = IRQ_NONE; |
7359d482 | 2061 | |
54216ace | 2062 | if (!dwc2_is_controller_alive(hsotg)) { |
057715f2 | 2063 | dev_warn(hsotg->dev, "Controller is dead\n"); |
6aafb003 | 2064 | return retval; |
7359d482 PZ |
2065 | } |
2066 | ||
2067 | spin_lock(&hsotg->lock); | |
2068 | ||
2069 | /* Check if HOST Mode */ | |
2070 | if (dwc2_is_host_mode(hsotg)) { | |
2071 | gintsts = dwc2_read_core_intr(hsotg); | |
2072 | if (!gintsts) { | |
2073 | spin_unlock(&hsotg->lock); | |
6aafb003 | 2074 | return retval; |
7359d482 PZ |
2075 | } |
2076 | ||
6aafb003 | 2077 | retval = IRQ_HANDLED; |
7359d482 | 2078 | |
b49977a6 | 2079 | dbg_gintsts = gintsts; |
7359d482 | 2080 | #ifndef DEBUG_SOF |
b49977a6 | 2081 | dbg_gintsts &= ~GINTSTS_SOF; |
7359d482 | 2082 | #endif |
b49977a6 MK |
2083 | if (!dbg_perio()) |
2084 | dbg_gintsts &= ~(GINTSTS_HCHINT | GINTSTS_RXFLVL | | |
2085 | GINTSTS_PTXFEMP); | |
2086 | ||
2087 | /* Only print if there are any non-suppressed interrupts left */ | |
2088 | if (dbg_gintsts) | |
7359d482 PZ |
2089 | dev_vdbg(hsotg->dev, |
2090 | "DWC OTG HCD Interrupt Detected gintsts&gintmsk=0x%08x\n", | |
2091 | gintsts); | |
2092 | ||
2093 | if (gintsts & GINTSTS_SOF) | |
2094 | dwc2_sof_intr(hsotg); | |
2095 | if (gintsts & GINTSTS_RXFLVL) | |
2096 | dwc2_rx_fifo_level_intr(hsotg); | |
2097 | if (gintsts & GINTSTS_NPTXFEMP) | |
2098 | dwc2_np_tx_fifo_empty_intr(hsotg); | |
7359d482 PZ |
2099 | if (gintsts & GINTSTS_PRTINT) |
2100 | dwc2_port_intr(hsotg); | |
2101 | if (gintsts & GINTSTS_HCHINT) | |
2102 | dwc2_hc_intr(hsotg); | |
2103 | if (gintsts & GINTSTS_PTXFEMP) | |
2104 | dwc2_perio_tx_fifo_empty_intr(hsotg); | |
2105 | ||
b49977a6 | 2106 | if (dbg_gintsts) { |
7359d482 PZ |
2107 | dev_vdbg(hsotg->dev, |
2108 | "DWC OTG HCD Finished Servicing Interrupts\n"); | |
2109 | dev_vdbg(hsotg->dev, | |
2110 | "DWC OTG HCD gintsts=0x%08x gintmsk=0x%08x\n", | |
2111 | readl(hsotg->regs + GINTSTS), | |
2112 | readl(hsotg->regs + GINTMSK)); | |
7359d482 | 2113 | } |
7359d482 PZ |
2114 | } |
2115 | ||
2116 | spin_unlock(&hsotg->lock); | |
2117 | ||
2118 | return retval; | |
2119 | } |