Commit | Line | Data |
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1a79f22d | 1 | // SPDX-License-Identifier: GPL-2.0 |
a4198cdf | 2 | /* |
6e01fc77 | 3 | * usb.c - Hardware dependent module for USB |
a4198cdf CG |
4 | * |
5 | * Copyright (C) 2013-2015 Microchip Technology Germany II GmbH & Co. KG | |
a4198cdf CG |
6 | */ |
7 | ||
a4198cdf CG |
8 | #include <linux/module.h> |
9 | #include <linux/fs.h> | |
10 | #include <linux/usb.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/cdev.h> | |
14 | #include <linux/device.h> | |
15 | #include <linux/list.h> | |
16 | #include <linux/completion.h> | |
17 | #include <linux/mutex.h> | |
18 | #include <linux/spinlock.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/workqueue.h> | |
21 | #include <linux/sysfs.h> | |
22 | #include <linux/dma-mapping.h> | |
23 | #include <linux/etherdevice.h> | |
24 | #include <linux/uaccess.h> | |
b2765275 | 25 | #include <linux/most.h> |
a4198cdf CG |
26 | |
27 | #define USB_MTU 512 | |
28 | #define NO_ISOCHRONOUS_URB 0 | |
29 | #define AV_PACKETS_PER_XACT 2 | |
30 | #define BUF_CHAIN_SIZE 0xFFFF | |
31 | #define MAX_NUM_ENDPOINTS 30 | |
32 | #define MAX_SUFFIX_LEN 10 | |
33 | #define MAX_STRING_LEN 80 | |
34 | #define MAX_BUF_SIZE 0xFFFF | |
a4198cdf CG |
35 | |
36 | #define USB_VENDOR_ID_SMSC 0x0424 /* VID: SMSC */ | |
37 | #define USB_DEV_ID_BRDG 0xC001 /* PID: USB Bridge */ | |
654f7ec4 | 38 | #define USB_DEV_ID_OS81118 0xCF18 /* PID: USB OS81118 */ |
b50762ea | 39 | #define USB_DEV_ID_OS81119 0xCF19 /* PID: USB OS81119 */ |
5bf9bd8d | 40 | #define USB_DEV_ID_OS81210 0xCF30 /* PID: USB OS81210 */ |
a4198cdf CG |
41 | /* DRCI Addresses */ |
42 | #define DRCI_REG_NI_STATE 0x0100 | |
43 | #define DRCI_REG_PACKET_BW 0x0101 | |
44 | #define DRCI_REG_NODE_ADDR 0x0102 | |
45 | #define DRCI_REG_NODE_POS 0x0103 | |
46 | #define DRCI_REG_MEP_FILTER 0x0140 | |
47 | #define DRCI_REG_HASH_TBL0 0x0141 | |
48 | #define DRCI_REG_HASH_TBL1 0x0142 | |
49 | #define DRCI_REG_HASH_TBL2 0x0143 | |
50 | #define DRCI_REG_HASH_TBL3 0x0144 | |
51 | #define DRCI_REG_HW_ADDR_HI 0x0145 | |
52 | #define DRCI_REG_HW_ADDR_MI 0x0146 | |
53 | #define DRCI_REG_HW_ADDR_LO 0x0147 | |
d747e8ec CG |
54 | #define DRCI_REG_BASE 0x1100 |
55 | #define DRCI_COMMAND 0x02 | |
a4198cdf CG |
56 | #define DRCI_READ_REQ 0xA0 |
57 | #define DRCI_WRITE_REQ 0xA1 | |
58 | ||
a4198cdf CG |
59 | /** |
60 | * struct most_dci_obj - Direct Communication Interface | |
61 | * @kobj:position in sysfs | |
62 | * @usb_device: pointer to the usb device | |
c0554645 | 63 | * @reg_addr: register address for arbitrary DCI access |
a4198cdf CG |
64 | */ |
65 | struct most_dci_obj { | |
4d5f022f | 66 | struct device dev; |
a4198cdf | 67 | struct usb_device *usb_device; |
c0554645 | 68 | u16 reg_addr; |
a4198cdf | 69 | }; |
9cbe5aa6 | 70 | |
4d5f022f | 71 | #define to_dci_obj(p) container_of(p, struct most_dci_obj, dev) |
a4198cdf | 72 | |
cc28983c CG |
73 | struct most_dev; |
74 | ||
75 | struct clear_hold_work { | |
76 | struct work_struct ws; | |
77 | struct most_dev *mdev; | |
78 | unsigned int channel; | |
79 | int pipe; | |
80 | }; | |
81 | ||
82 | #define to_clear_hold_work(w) container_of(w, struct clear_hold_work, ws) | |
83 | ||
a4198cdf CG |
84 | /** |
85 | * struct most_dev - holds all usb interface specific stuff | |
a4198cdf CG |
86 | * @usb_device: pointer to usb device |
87 | * @iface: hardware interface | |
88 | * @cap: channel capabilities | |
89 | * @conf: channel configuration | |
90 | * @dci: direct communication interface of hardware | |
a4198cdf | 91 | * @ep_address: endpoint address table |
a4198cdf CG |
92 | * @description: device description |
93 | * @suffix: suffix for channel name | |
88d1878b | 94 | * @channel_lock: synchronize channel access |
a4198cdf CG |
95 | * @padding_active: indicates channel uses padding |
96 | * @is_channel_healthy: health status table of each channel | |
27e6245e | 97 | * @busy_urbs: list of anchored items |
a4198cdf CG |
98 | * @io_mutex: synchronize I/O with disconnect |
99 | * @link_stat_timer: timer for link status reports | |
100 | * @poll_work_obj: work for polling link status | |
101 | */ | |
102 | struct most_dev { | |
723de0f9 | 103 | struct device dev; |
a4198cdf CG |
104 | struct usb_device *usb_device; |
105 | struct most_interface iface; | |
106 | struct most_channel_capability *cap; | |
107 | struct most_channel_config *conf; | |
108 | struct most_dci_obj *dci; | |
a4198cdf | 109 | u8 *ep_address; |
a4198cdf CG |
110 | char description[MAX_STRING_LEN]; |
111 | char suffix[MAX_NUM_ENDPOINTS][MAX_SUFFIX_LEN]; | |
88d1878b | 112 | spinlock_t channel_lock[MAX_NUM_ENDPOINTS]; /* sync channel access */ |
a4198cdf CG |
113 | bool padding_active[MAX_NUM_ENDPOINTS]; |
114 | bool is_channel_healthy[MAX_NUM_ENDPOINTS]; | |
cc28983c | 115 | struct clear_hold_work clear_work[MAX_NUM_ENDPOINTS]; |
27e6245e | 116 | struct usb_anchor *busy_urbs; |
a4198cdf CG |
117 | struct mutex io_mutex; |
118 | struct timer_list link_stat_timer; | |
119 | struct work_struct poll_work_obj; | |
9917b209 RE |
120 | void (*on_netinfo)(struct most_interface *most_iface, |
121 | unsigned char link_state, unsigned char *addrs); | |
a4198cdf | 122 | }; |
9cbe5aa6 | 123 | |
a4198cdf | 124 | #define to_mdev(d) container_of(d, struct most_dev, iface) |
723de0f9 | 125 | #define to_mdev_from_dev(d) container_of(d, struct most_dev, dev) |
a4198cdf CG |
126 | #define to_mdev_from_work(w) container_of(w, struct most_dev, poll_work_obj) |
127 | ||
a4198cdf CG |
128 | static void wq_clear_halt(struct work_struct *wq_obj); |
129 | static void wq_netinfo(struct work_struct *wq_obj); | |
130 | ||
a4198cdf CG |
131 | /** |
132 | * drci_rd_reg - read a DCI register | |
133 | * @dev: usb device | |
134 | * @reg: register address | |
135 | * @buf: buffer to store data | |
136 | * | |
137 | * This is reads data from INIC's direct register communication interface | |
138 | */ | |
26370228 | 139 | static inline int drci_rd_reg(struct usb_device *dev, u16 reg, u16 *buf) |
a4198cdf | 140 | { |
26370228 | 141 | int retval; |
a0dbe1b2 | 142 | __le16 *dma_buf; |
26370228 CG |
143 | u8 req_type = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE; |
144 | ||
a0dbe1b2 | 145 | dma_buf = kzalloc(sizeof(*dma_buf), GFP_KERNEL); |
26370228 CG |
146 | if (!dma_buf) |
147 | return -ENOMEM; | |
148 | ||
149 | retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
150 | DRCI_READ_REQ, req_type, | |
151 | 0x0000, | |
63b3e810 JH |
152 | reg, dma_buf, sizeof(*dma_buf), |
153 | USB_CTRL_GET_TIMEOUT); | |
c81c9c3e | 154 | *buf = le16_to_cpu(*dma_buf); |
26370228 CG |
155 | kfree(dma_buf); |
156 | ||
ffd069ec CG |
157 | if (retval < 0) |
158 | return retval; | |
159 | return 0; | |
a4198cdf CG |
160 | } |
161 | ||
162 | /** | |
163 | * drci_wr_reg - write a DCI register | |
164 | * @dev: usb device | |
165 | * @reg: register address | |
166 | * @data: data to write | |
167 | * | |
168 | * This is writes data to INIC's direct register communication interface | |
169 | */ | |
170 | static inline int drci_wr_reg(struct usb_device *dev, u16 reg, u16 data) | |
171 | { | |
172 | return usb_control_msg(dev, | |
173 | usb_sndctrlpipe(dev, 0), | |
174 | DRCI_WRITE_REQ, | |
175 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
176 | data, | |
177 | reg, | |
178 | NULL, | |
179 | 0, | |
63b3e810 | 180 | USB_CTRL_SET_TIMEOUT); |
a4198cdf CG |
181 | } |
182 | ||
e33269f6 AS |
183 | static inline int start_sync_ep(struct usb_device *usb_dev, u16 ep) |
184 | { | |
185 | return drci_wr_reg(usb_dev, DRCI_REG_BASE + DRCI_COMMAND + ep * 16, 1); | |
186 | } | |
187 | ||
a4198cdf CG |
188 | /** |
189 | * get_stream_frame_size - calculate frame size of current configuration | |
1c538a41 | 190 | * @dev: device structure |
a4198cdf CG |
191 | * @cfg: channel configuration |
192 | */ | |
1c538a41 CG |
193 | static unsigned int get_stream_frame_size(struct device *dev, |
194 | struct most_channel_config *cfg) | |
a4198cdf | 195 | { |
2c069b61 | 196 | unsigned int frame_size; |
a4198cdf CG |
197 | unsigned int sub_size = cfg->subbuffer_size; |
198 | ||
199 | if (!sub_size) { | |
62573221 | 200 | dev_warn(dev, "Misconfig: Subbuffer size zero.\n"); |
2c069b61 | 201 | return 0; |
a4198cdf CG |
202 | } |
203 | switch (cfg->data_type) { | |
0540609f | 204 | case MOST_CH_ISOC: |
a4198cdf CG |
205 | frame_size = AV_PACKETS_PER_XACT * sub_size; |
206 | break; | |
207 | case MOST_CH_SYNC: | |
208 | if (cfg->packets_per_xact == 0) { | |
62573221 | 209 | dev_warn(dev, "Misconfig: Packets per XACT zero\n"); |
a4198cdf | 210 | frame_size = 0; |
9deba73d | 211 | } else if (cfg->packets_per_xact == 0xFF) { |
a4198cdf | 212 | frame_size = (USB_MTU / sub_size) * sub_size; |
9deba73d | 213 | } else { |
a4198cdf | 214 | frame_size = cfg->packets_per_xact * sub_size; |
9deba73d | 215 | } |
a4198cdf CG |
216 | break; |
217 | default: | |
62573221 | 218 | dev_warn(dev, "Query frame size of non-streaming channel\n"); |
11974ace | 219 | frame_size = 0; |
a4198cdf CG |
220 | break; |
221 | } | |
222 | return frame_size; | |
223 | } | |
224 | ||
225 | /** | |
226 | * hdm_poison_channel - mark buffers of this channel as invalid | |
227 | * @iface: pointer to the interface | |
228 | * @channel: channel ID | |
229 | * | |
230 | * This unlinks all URBs submitted to the HCD, | |
231 | * calls the associated completion function of the core and removes | |
232 | * them from the list. | |
233 | * | |
234 | * Returns 0 on success or error code otherwise. | |
235 | */ | |
23fe15fa | 236 | static int hdm_poison_channel(struct most_interface *iface, int channel) |
a4198cdf | 237 | { |
089612f1 | 238 | struct most_dev *mdev = to_mdev(iface); |
b24c9fe9 CG |
239 | unsigned long flags; |
240 | spinlock_t *lock; /* temp. lock */ | |
a4198cdf | 241 | |
188d5b41 | 242 | if (channel < 0 || channel >= iface->num_channels) { |
59ed0480 | 243 | dev_warn(&mdev->usb_device->dev, "Channel ID out of range.\n"); |
a4198cdf CG |
244 | return -ECHRNG; |
245 | } | |
246 | ||
88d1878b | 247 | lock = mdev->channel_lock + channel; |
b24c9fe9 | 248 | spin_lock_irqsave(lock, flags); |
a4198cdf | 249 | mdev->is_channel_healthy[channel] = false; |
b24c9fe9 | 250 | spin_unlock_irqrestore(lock, flags); |
a4198cdf | 251 | |
cc28983c CG |
252 | cancel_work_sync(&mdev->clear_work[channel].ws); |
253 | ||
a4198cdf | 254 | mutex_lock(&mdev->io_mutex); |
3a542007 | 255 | usb_kill_anchored_urbs(&mdev->busy_urbs[channel]); |
ec58d2a8 | 256 | if (mdev->padding_active[channel]) |
a4198cdf CG |
257 | mdev->padding_active[channel] = false; |
258 | ||
259 | if (mdev->conf[channel].data_type == MOST_CH_ASYNC) { | |
260 | del_timer_sync(&mdev->link_stat_timer); | |
261 | cancel_work_sync(&mdev->poll_work_obj); | |
262 | } | |
263 | mutex_unlock(&mdev->io_mutex); | |
264 | return 0; | |
265 | } | |
266 | ||
267 | /** | |
268 | * hdm_add_padding - add padding bytes | |
269 | * @mdev: most device | |
270 | * @channel: channel ID | |
271 | * @mbo: buffer object | |
272 | * | |
273 | * This inserts the INIC hardware specific padding bytes into a streaming | |
274 | * channel's buffer | |
275 | */ | |
23fe15fa | 276 | static int hdm_add_padding(struct most_dev *mdev, int channel, struct mbo *mbo) |
a4198cdf CG |
277 | { |
278 | struct most_channel_config *conf = &mdev->conf[channel]; | |
1c538a41 | 279 | unsigned int frame_size = get_stream_frame_size(&mdev->dev, conf); |
ac33fbb8 | 280 | unsigned int j, num_frames; |
a4198cdf | 281 | |
a4198cdf | 282 | if (!frame_size) |
441be56f | 283 | return -EINVAL; |
a4198cdf CG |
284 | num_frames = mbo->buffer_length / frame_size; |
285 | ||
286 | if (num_frames < 1) { | |
59ed0480 CG |
287 | dev_err(&mdev->usb_device->dev, |
288 | "Missed minimal transfer unit.\n"); | |
441be56f | 289 | return -EINVAL; |
a4198cdf CG |
290 | } |
291 | ||
5c13155d AS |
292 | for (j = num_frames - 1; j > 0; j--) |
293 | memmove(mbo->virt_address + j * USB_MTU, | |
294 | mbo->virt_address + j * frame_size, | |
a4198cdf | 295 | frame_size); |
a4198cdf CG |
296 | mbo->buffer_length = num_frames * USB_MTU; |
297 | return 0; | |
298 | } | |
299 | ||
300 | /** | |
301 | * hdm_remove_padding - remove padding bytes | |
302 | * @mdev: most device | |
303 | * @channel: channel ID | |
304 | * @mbo: buffer object | |
305 | * | |
306 | * This takes the INIC hardware specific padding bytes off a streaming | |
307 | * channel's buffer. | |
308 | */ | |
ba170ee2 CG |
309 | static int hdm_remove_padding(struct most_dev *mdev, int channel, |
310 | struct mbo *mbo) | |
a4198cdf | 311 | { |
a4198cdf | 312 | struct most_channel_config *const conf = &mdev->conf[channel]; |
1c538a41 | 313 | unsigned int frame_size = get_stream_frame_size(&mdev->dev, conf); |
ac33fbb8 | 314 | unsigned int j, num_frames; |
a4198cdf | 315 | |
a4198cdf | 316 | if (!frame_size) |
441be56f | 317 | return -EINVAL; |
a4198cdf CG |
318 | num_frames = mbo->processed_length / USB_MTU; |
319 | ||
320 | for (j = 1; j < num_frames; j++) | |
321 | memmove(mbo->virt_address + frame_size * j, | |
322 | mbo->virt_address + USB_MTU * j, | |
323 | frame_size); | |
324 | ||
325 | mbo->processed_length = frame_size * num_frames; | |
326 | return 0; | |
327 | } | |
328 | ||
329 | /** | |
330 | * hdm_write_completion - completion function for submitted Tx URBs | |
331 | * @urb: the URB that has been completed | |
332 | * | |
333 | * This checks the status of the completed URB. In case the URB has been | |
334 | * unlinked before, it is immediately freed. On any other error the MBO | |
335 | * transfer flag is set. On success it frees allocated resources and calls | |
336 | * the completion function. | |
337 | * | |
338 | * Context: interrupt! | |
339 | */ | |
340 | static void hdm_write_completion(struct urb *urb) | |
341 | { | |
089612f1 | 342 | struct mbo *mbo = urb->context; |
089612f1 CG |
343 | struct most_dev *mdev = to_mdev(mbo->ifp); |
344 | unsigned int channel = mbo->hdm_channel_id; | |
88d1878b | 345 | spinlock_t *lock = mdev->channel_lock + channel; |
a4198cdf | 346 | unsigned long flags; |
a4198cdf | 347 | |
b24c9fe9 | 348 | spin_lock_irqsave(lock, flags); |
a4198cdf | 349 | |
3a542007 AS |
350 | mbo->processed_length = 0; |
351 | mbo->status = MBO_E_INVAL; | |
352 | if (likely(mdev->is_channel_healthy[channel])) { | |
a4198cdf | 353 | switch (urb->status) { |
3a542007 AS |
354 | case 0: |
355 | case -ESHUTDOWN: | |
356 | mbo->processed_length = urb->actual_length; | |
357 | mbo->status = MBO_SUCCESS; | |
358 | break; | |
a4198cdf | 359 | case -EPIPE: |
be8a8ca3 CG |
360 | dev_warn(&mdev->usb_device->dev, |
361 | "Broken pipe on ep%02x\n", | |
3b1a774b | 362 | mdev->ep_address[channel]); |
879c93fe | 363 | mdev->is_channel_healthy[channel] = false; |
cc28983c CG |
364 | mdev->clear_work[channel].pipe = urb->pipe; |
365 | schedule_work(&mdev->clear_work[channel].ws); | |
3a542007 | 366 | break; |
a4198cdf CG |
367 | case -ENODEV: |
368 | case -EPROTO: | |
369 | mbo->status = MBO_E_CLOSE; | |
370 | break; | |
a4198cdf | 371 | } |
a4198cdf CG |
372 | } |
373 | ||
cf6a599e | 374 | spin_unlock_irqrestore(lock, flags); |
a4198cdf CG |
375 | |
376 | if (likely(mbo->complete)) | |
377 | mbo->complete(mbo); | |
378 | usb_free_urb(urb); | |
379 | } | |
380 | ||
381 | /** | |
9f17591f | 382 | * hdm_read_completion - completion function for submitted Rx URBs |
a4198cdf CG |
383 | * @urb: the URB that has been completed |
384 | * | |
385 | * This checks the status of the completed URB. In case the URB has been | |
386 | * unlinked before it is immediately freed. On any other error the MBO transfer | |
387 | * flag is set. On success it frees allocated resources, removes | |
388 | * padding bytes -if necessary- and calls the completion function. | |
389 | * | |
390 | * Context: interrupt! | |
a4198cdf CG |
391 | */ |
392 | static void hdm_read_completion(struct urb *urb) | |
393 | { | |
089612f1 | 394 | struct mbo *mbo = urb->context; |
089612f1 CG |
395 | struct most_dev *mdev = to_mdev(mbo->ifp); |
396 | unsigned int channel = mbo->hdm_channel_id; | |
397 | struct device *dev = &mdev->usb_device->dev; | |
88d1878b | 398 | spinlock_t *lock = mdev->channel_lock + channel; |
a4198cdf | 399 | unsigned long flags; |
a4198cdf | 400 | |
b24c9fe9 | 401 | spin_lock_irqsave(lock, flags); |
a4198cdf | 402 | |
3a542007 AS |
403 | mbo->processed_length = 0; |
404 | mbo->status = MBO_E_INVAL; | |
405 | if (likely(mdev->is_channel_healthy[channel])) { | |
a4198cdf | 406 | switch (urb->status) { |
3a542007 AS |
407 | case 0: |
408 | case -ESHUTDOWN: | |
409 | mbo->processed_length = urb->actual_length; | |
410 | mbo->status = MBO_SUCCESS; | |
411 | if (mdev->padding_active[channel] && | |
412 | hdm_remove_padding(mdev, channel, mbo)) { | |
413 | mbo->processed_length = 0; | |
414 | mbo->status = MBO_E_INVAL; | |
415 | } | |
416 | break; | |
a4198cdf | 417 | case -EPIPE: |
3b1a774b CG |
418 | dev_warn(dev, "Broken pipe on ep%02x\n", |
419 | mdev->ep_address[channel]); | |
879c93fe | 420 | mdev->is_channel_healthy[channel] = false; |
cc28983c CG |
421 | mdev->clear_work[channel].pipe = urb->pipe; |
422 | schedule_work(&mdev->clear_work[channel].ws); | |
3a542007 | 423 | break; |
a4198cdf CG |
424 | case -ENODEV: |
425 | case -EPROTO: | |
426 | mbo->status = MBO_E_CLOSE; | |
427 | break; | |
428 | case -EOVERFLOW: | |
3b1a774b CG |
429 | dev_warn(dev, "Babble on ep%02x\n", |
430 | mdev->ep_address[channel]); | |
a4198cdf CG |
431 | break; |
432 | } | |
a4198cdf | 433 | } |
b24c9fe9 | 434 | |
cf6a599e | 435 | spin_unlock_irqrestore(lock, flags); |
a4198cdf CG |
436 | |
437 | if (likely(mbo->complete)) | |
438 | mbo->complete(mbo); | |
439 | usb_free_urb(urb); | |
440 | } | |
441 | ||
442 | /** | |
443 | * hdm_enqueue - receive a buffer to be used for data transfer | |
444 | * @iface: interface to enqueue to | |
445 | * @channel: ID of the channel | |
446 | * @mbo: pointer to the buffer object | |
447 | * | |
448 | * This allocates a new URB and fills it according to the channel | |
449 | * that is being used for transmission of data. Before the URB is | |
450 | * submitted it is stored in the private anchor list. | |
451 | * | |
452 | * Returns 0 on success. On any error the URB is freed and a error code | |
453 | * is returned. | |
454 | * | |
455 | * Context: Could in _some_ cases be interrupt! | |
456 | */ | |
ba170ee2 CG |
457 | static int hdm_enqueue(struct most_interface *iface, int channel, |
458 | struct mbo *mbo) | |
a4198cdf | 459 | { |
e3881eb5 | 460 | struct most_dev *mdev = to_mdev(iface); |
a4198cdf CG |
461 | struct most_channel_config *conf; |
462 | int retval = 0; | |
463 | struct urb *urb; | |
a4198cdf CG |
464 | unsigned long length; |
465 | void *virt_address; | |
466 | ||
188d5b41 | 467 | if (!mbo) |
441be56f | 468 | return -EINVAL; |
188d5b41 | 469 | if (iface->num_channels <= channel || channel < 0) |
a4198cdf | 470 | return -ECHRNG; |
a4198cdf | 471 | |
8bf56cfa CG |
472 | urb = usb_alloc_urb(NO_ISOCHRONOUS_URB, GFP_KERNEL); |
473 | if (!urb) | |
474 | return -ENOMEM; | |
475 | ||
a4198cdf CG |
476 | conf = &mdev->conf[channel]; |
477 | ||
c06b99e0 CG |
478 | mutex_lock(&mdev->io_mutex); |
479 | if (!mdev->usb_device) { | |
480 | retval = -ENODEV; | |
8bf56cfa | 481 | goto err_free_urb; |
c06b99e0 | 482 | } |
a4198cdf | 483 | |
dd53ecba CG |
484 | if ((conf->direction & MOST_CH_TX) && mdev->padding_active[channel] && |
485 | hdm_add_padding(mdev, channel, mbo)) { | |
441be56f | 486 | retval = -EINVAL; |
bddd3c25 | 487 | goto err_free_urb; |
dd53ecba | 488 | } |
a4198cdf CG |
489 | |
490 | urb->transfer_dma = mbo->bus_address; | |
491 | virt_address = mbo->virt_address; | |
492 | length = mbo->buffer_length; | |
493 | ||
494 | if (conf->direction & MOST_CH_TX) { | |
495 | usb_fill_bulk_urb(urb, mdev->usb_device, | |
496 | usb_sndbulkpipe(mdev->usb_device, | |
497 | mdev->ep_address[channel]), | |
498 | virt_address, | |
499 | length, | |
500 | hdm_write_completion, | |
501 | mbo); | |
9a32315b CG |
502 | if (conf->data_type != MOST_CH_ISOC && |
503 | conf->data_type != MOST_CH_SYNC) | |
a4198cdf CG |
504 | urb->transfer_flags |= URB_ZERO_PACKET; |
505 | } else { | |
506 | usb_fill_bulk_urb(urb, mdev->usb_device, | |
507 | usb_rcvbulkpipe(mdev->usb_device, | |
508 | mdev->ep_address[channel]), | |
509 | virt_address, | |
9161e931 | 510 | length + conf->extra_len, |
a4198cdf CG |
511 | hdm_read_completion, |
512 | mbo); | |
513 | } | |
514 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
515 | ||
27e6245e | 516 | usb_anchor_urb(urb, &mdev->busy_urbs[channel]); |
ec7e0a18 | 517 | |
a4198cdf CG |
518 | retval = usb_submit_urb(urb, GFP_KERNEL); |
519 | if (retval) { | |
be8a8ca3 CG |
520 | dev_err(&mdev->usb_device->dev, |
521 | "URB submit failed with error %d.\n", retval); | |
bddd3c25 | 522 | goto err_unanchor_urb; |
a4198cdf | 523 | } |
6405fe21 CG |
524 | mutex_unlock(&mdev->io_mutex); |
525 | return 0; | |
a4198cdf | 526 | |
bddd3c25 | 527 | err_unanchor_urb: |
27e6245e | 528 | usb_unanchor_urb(urb); |
bddd3c25 | 529 | err_free_urb: |
a4198cdf | 530 | usb_free_urb(urb); |
c06b99e0 | 531 | mutex_unlock(&mdev->io_mutex); |
a4198cdf CG |
532 | return retval; |
533 | } | |
534 | ||
3598cec5 CG |
535 | static void *hdm_dma_alloc(struct mbo *mbo, u32 size) |
536 | { | |
537 | struct most_dev *mdev = to_mdev(mbo->ifp); | |
538 | ||
539 | return usb_alloc_coherent(mdev->usb_device, size, GFP_KERNEL, | |
540 | &mbo->bus_address); | |
541 | } | |
542 | ||
543 | static void hdm_dma_free(struct mbo *mbo, u32 size) | |
544 | { | |
545 | struct most_dev *mdev = to_mdev(mbo->ifp); | |
546 | ||
547 | usb_free_coherent(mdev->usb_device, size, mbo->virt_address, | |
548 | mbo->bus_address); | |
549 | } | |
550 | ||
a4198cdf CG |
551 | /** |
552 | * hdm_configure_channel - receive channel configuration from core | |
553 | * @iface: interface | |
554 | * @channel: channel ID | |
555 | * @conf: structure that holds the configuration information | |
25e3854c CG |
556 | * |
557 | * The attached network interface controller (NIC) supports a padding mode | |
558 | * to avoid short packets on USB, hence increasing the performance due to a | |
559 | * lower interrupt load. This mode is default for synchronous data and can | |
560 | * be switched on for isochronous data. In case padding is active the | |
561 | * driver needs to know the frame size of the payload in order to calculate | |
562 | * the number of bytes it needs to pad when transmitting or to cut off when | |
563 | * receiving data. | |
564 | * | |
a4198cdf | 565 | */ |
23fe15fa AR |
566 | static int hdm_configure_channel(struct most_interface *iface, int channel, |
567 | struct most_channel_config *conf) | |
a4198cdf CG |
568 | { |
569 | unsigned int num_frames; | |
570 | unsigned int frame_size; | |
089612f1 CG |
571 | struct most_dev *mdev = to_mdev(iface); |
572 | struct device *dev = &mdev->usb_device->dev; | |
59ed0480 | 573 | |
188d5b41 | 574 | if (!conf) { |
3e8621ab | 575 | dev_err(dev, "Bad config pointer.\n"); |
a4198cdf CG |
576 | return -EINVAL; |
577 | } | |
188d5b41 | 578 | if (channel < 0 || channel >= iface->num_channels) { |
59ed0480 | 579 | dev_err(dev, "Channel ID out of range.\n"); |
a4198cdf CG |
580 | return -EINVAL; |
581 | } | |
d92e6991 CIK |
582 | |
583 | mdev->is_channel_healthy[channel] = true; | |
584 | mdev->clear_work[channel].channel = channel; | |
585 | mdev->clear_work[channel].mdev = mdev; | |
586 | INIT_WORK(&mdev->clear_work[channel].ws, wq_clear_halt); | |
587 | ||
dd53ecba | 588 | if (!conf->num_buffers || !conf->buffer_size) { |
59ed0480 | 589 | dev_err(dev, "Misconfig: buffer size or #buffers zero.\n"); |
a4198cdf CG |
590 | return -EINVAL; |
591 | } | |
592 | ||
dd53ecba | 593 | if (conf->data_type != MOST_CH_SYNC && |
0540609f | 594 | !(conf->data_type == MOST_CH_ISOC && |
dd53ecba | 595 | conf->packets_per_xact != 0xFF)) { |
a4198cdf | 596 | mdev->padding_active[channel] = false; |
25e3854c CG |
597 | /* |
598 | * Since the NIC's padding mode is not going to be | |
599 | * used, we can skip the frame size calculations and | |
600 | * move directly on to exit. | |
601 | */ | |
a4198cdf CG |
602 | goto exit; |
603 | } | |
604 | ||
605 | mdev->padding_active[channel] = true; | |
a4198cdf | 606 | |
1c538a41 | 607 | frame_size = get_stream_frame_size(&mdev->dev, conf); |
dd53ecba | 608 | if (frame_size == 0 || frame_size > USB_MTU) { |
59ed0480 | 609 | dev_warn(dev, "Misconfig: frame size wrong\n"); |
a4198cdf CG |
610 | return -EINVAL; |
611 | } | |
612 | ||
f5001928 AS |
613 | num_frames = conf->buffer_size / frame_size; |
614 | ||
a4198cdf | 615 | if (conf->buffer_size % frame_size) { |
f5001928 | 616 | u16 old_size = conf->buffer_size; |
a4198cdf | 617 | |
f5001928 AS |
618 | conf->buffer_size = num_frames * frame_size; |
619 | dev_warn(dev, "%s: fixed buffer size (%d -> %d)\n", | |
620 | mdev->suffix[channel], old_size, conf->buffer_size); | |
621 | } | |
a4198cdf CG |
622 | |
623 | /* calculate extra length to comply w/ HW padding */ | |
f5001928 AS |
624 | conf->extra_len = num_frames * (USB_MTU - frame_size); |
625 | ||
a4198cdf CG |
626 | exit: |
627 | mdev->conf[channel] = *conf; | |
7c23baa9 AS |
628 | if (conf->data_type == MOST_CH_ASYNC) { |
629 | u16 ep = mdev->ep_address[channel]; | |
7c23baa9 | 630 | |
e33269f6 | 631 | if (start_sync_ep(mdev->usb_device, ep) < 0) |
7c23baa9 AS |
632 | dev_warn(dev, "sync for ep%02x failed", ep); |
633 | } | |
a4198cdf CG |
634 | return 0; |
635 | } | |
636 | ||
a4198cdf CG |
637 | /** |
638 | * hdm_request_netinfo - request network information | |
639 | * @iface: pointer to interface | |
640 | * @channel: channel ID | |
641 | * | |
642 | * This is used as trigger to set up the link status timer that | |
643 | * polls for the NI state of the INIC every 2 seconds. | |
644 | * | |
645 | */ | |
d35bbfaa AS |
646 | static void hdm_request_netinfo(struct most_interface *iface, int channel, |
647 | void (*on_netinfo)(struct most_interface *, | |
648 | unsigned char, | |
649 | unsigned char *)) | |
a4198cdf | 650 | { |
e3881eb5 | 651 | struct most_dev *mdev = to_mdev(iface); |
a4198cdf | 652 | |
d35bbfaa AS |
653 | mdev->on_netinfo = on_netinfo; |
654 | if (!on_netinfo) | |
655 | return; | |
656 | ||
a4198cdf CG |
657 | mdev->link_stat_timer.expires = jiffies + HZ; |
658 | mod_timer(&mdev->link_stat_timer, mdev->link_stat_timer.expires); | |
659 | } | |
660 | ||
661 | /** | |
f28e6cd3 | 662 | * link_stat_timer_handler - schedule work obtaining mac address and link status |
fba3993e | 663 | * @t: pointer to timer_list which holds a pointer to the USB device instance |
a4198cdf CG |
664 | * |
665 | * The handler runs in interrupt context. That's why we need to defer the | |
666 | * tasks to a work queue. | |
667 | */ | |
e99e88a9 | 668 | static void link_stat_timer_handler(struct timer_list *t) |
a4198cdf | 669 | { |
e99e88a9 | 670 | struct most_dev *mdev = from_timer(mdev, t, link_stat_timer); |
a4198cdf | 671 | |
e3479f77 | 672 | schedule_work(&mdev->poll_work_obj); |
a4198cdf CG |
673 | mdev->link_stat_timer.expires = jiffies + (2 * HZ); |
674 | add_timer(&mdev->link_stat_timer); | |
675 | } | |
676 | ||
677 | /** | |
f28e6cd3 | 678 | * wq_netinfo - work queue function to deliver latest networking information |
a4198cdf CG |
679 | * @wq_obj: object that holds data for our deferred work to do |
680 | * | |
681 | * This retrieves the network interface status of the USB INIC | |
a4198cdf CG |
682 | */ |
683 | static void wq_netinfo(struct work_struct *wq_obj) | |
684 | { | |
089612f1 | 685 | struct most_dev *mdev = to_mdev_from_work(wq_obj); |
f28e6cd3 AS |
686 | struct usb_device *usb_device = mdev->usb_device; |
687 | struct device *dev = &usb_device->dev; | |
688 | u16 hi, mi, lo, link; | |
689 | u8 hw_addr[6]; | |
690 | ||
ffd069ec | 691 | if (drci_rd_reg(usb_device, DRCI_REG_HW_ADDR_HI, &hi)) { |
f28e6cd3 AS |
692 | dev_err(dev, "Vendor request 'hw_addr_hi' failed\n"); |
693 | return; | |
694 | } | |
a4198cdf | 695 | |
ffd069ec | 696 | if (drci_rd_reg(usb_device, DRCI_REG_HW_ADDR_MI, &mi)) { |
f28e6cd3 AS |
697 | dev_err(dev, "Vendor request 'hw_addr_mid' failed\n"); |
698 | return; | |
699 | } | |
700 | ||
ffd069ec | 701 | if (drci_rd_reg(usb_device, DRCI_REG_HW_ADDR_LO, &lo)) { |
f28e6cd3 AS |
702 | dev_err(dev, "Vendor request 'hw_addr_low' failed\n"); |
703 | return; | |
704 | } | |
a4198cdf | 705 | |
ffd069ec | 706 | if (drci_rd_reg(usb_device, DRCI_REG_NI_STATE, &link)) { |
f28e6cd3 | 707 | dev_err(dev, "Vendor request 'link status' failed\n"); |
a4198cdf | 708 | return; |
f28e6cd3 AS |
709 | } |
710 | ||
711 | hw_addr[0] = hi >> 8; | |
712 | hw_addr[1] = hi; | |
713 | hw_addr[2] = mi >> 8; | |
714 | hw_addr[3] = mi; | |
715 | hw_addr[4] = lo >> 8; | |
716 | hw_addr[5] = lo; | |
717 | ||
d35bbfaa AS |
718 | if (mdev->on_netinfo) |
719 | mdev->on_netinfo(&mdev->iface, link, hw_addr); | |
a4198cdf CG |
720 | } |
721 | ||
722 | /** | |
723 | * wq_clear_halt - work queue function | |
724 | * @wq_obj: work_struct object to execute | |
725 | * | |
726 | * This sends a clear_halt to the given USB pipe. | |
727 | */ | |
728 | static void wq_clear_halt(struct work_struct *wq_obj) | |
729 | { | |
cc28983c CG |
730 | struct clear_hold_work *clear_work = to_clear_hold_work(wq_obj); |
731 | struct most_dev *mdev = clear_work->mdev; | |
732 | unsigned int channel = clear_work->channel; | |
733 | int pipe = clear_work->pipe; | |
1fd4fb8c CG |
734 | int snd_pipe; |
735 | int peer; | |
a4198cdf | 736 | |
cc28983c | 737 | mutex_lock(&mdev->io_mutex); |
bf9503f1 | 738 | most_stop_enqueue(&mdev->iface, channel); |
3a542007 | 739 | usb_kill_anchored_urbs(&mdev->busy_urbs[channel]); |
cc28983c | 740 | if (usb_clear_halt(mdev->usb_device, pipe)) |
59ed0480 | 741 | dev_warn(&mdev->usb_device->dev, "Failed to reset endpoint.\n"); |
a4198cdf | 742 | |
8f20f2dc CG |
743 | /* If the functional Stall condition has been set on an |
744 | * asynchronous rx channel, we need to clear the tx channel | |
745 | * too, since the hardware runs its clean-up sequence on both | |
746 | * channels, as they are physically one on the network. | |
747 | * | |
748 | * The USB interface that exposes the asynchronous channels | |
749 | * contains always two endpoints, and two only. | |
750 | */ | |
751 | if (mdev->conf[channel].data_type == MOST_CH_ASYNC && | |
752 | mdev->conf[channel].direction == MOST_CH_RX) { | |
1fd4fb8c CG |
753 | if (channel == 0) |
754 | peer = 1; | |
755 | else | |
756 | peer = 0; | |
757 | snd_pipe = usb_sndbulkpipe(mdev->usb_device, | |
758 | mdev->ep_address[peer]); | |
8f20f2dc CG |
759 | usb_clear_halt(mdev->usb_device, snd_pipe); |
760 | } | |
879c93fe | 761 | mdev->is_channel_healthy[channel] = true; |
72df4a55 | 762 | most_resume_enqueue(&mdev->iface, channel); |
cc28983c | 763 | mutex_unlock(&mdev->io_mutex); |
a4198cdf CG |
764 | } |
765 | ||
fba3993e | 766 | /* |
a4198cdf CG |
767 | * hdm_usb_fops - file operation table for USB driver |
768 | */ | |
769 | static const struct file_operations hdm_usb_fops = { | |
770 | .owner = THIS_MODULE, | |
771 | }; | |
772 | ||
fba3993e | 773 | /* |
a4198cdf CG |
774 | * usb_device_id - ID table for HCD device probing |
775 | */ | |
27acb557 | 776 | static const struct usb_device_id usbid[] = { |
a4198cdf | 777 | { USB_DEVICE(USB_VENDOR_ID_SMSC, USB_DEV_ID_BRDG), }, |
654f7ec4 | 778 | { USB_DEVICE(USB_VENDOR_ID_SMSC, USB_DEV_ID_OS81118), }, |
b50762ea | 779 | { USB_DEVICE(USB_VENDOR_ID_SMSC, USB_DEV_ID_OS81119), }, |
5bf9bd8d | 780 | { USB_DEVICE(USB_VENDOR_ID_SMSC, USB_DEV_ID_OS81210), }, |
a4198cdf CG |
781 | { } /* Terminating entry */ |
782 | }; | |
783 | ||
a747b42c CG |
784 | struct regs { |
785 | const char *name; | |
786 | u16 reg; | |
787 | }; | |
788 | ||
789 | static const struct regs ro_regs[] = { | |
790 | { "ni_state", DRCI_REG_NI_STATE }, | |
791 | { "packet_bandwidth", DRCI_REG_PACKET_BW }, | |
792 | { "node_address", DRCI_REG_NODE_ADDR }, | |
793 | { "node_position", DRCI_REG_NODE_POS }, | |
794 | }; | |
795 | ||
796 | static const struct regs rw_regs[] = { | |
797 | { "mep_filter", DRCI_REG_MEP_FILTER }, | |
798 | { "mep_hash0", DRCI_REG_HASH_TBL0 }, | |
799 | { "mep_hash1", DRCI_REG_HASH_TBL1 }, | |
800 | { "mep_hash2", DRCI_REG_HASH_TBL2 }, | |
801 | { "mep_hash3", DRCI_REG_HASH_TBL3 }, | |
802 | { "mep_eui48_hi", DRCI_REG_HW_ADDR_HI }, | |
803 | { "mep_eui48_mi", DRCI_REG_HW_ADDR_MI }, | |
804 | { "mep_eui48_lo", DRCI_REG_HW_ADDR_LO }, | |
805 | }; | |
806 | ||
807 | static int get_stat_reg_addr(const struct regs *regs, int size, | |
808 | const char *name, u16 *reg_addr) | |
809 | { | |
810 | int i; | |
811 | ||
812 | for (i = 0; i < size; i++) { | |
549d2db7 | 813 | if (sysfs_streq(name, regs[i].name)) { |
a747b42c CG |
814 | *reg_addr = regs[i].reg; |
815 | return 0; | |
816 | } | |
817 | } | |
f470a5b0 | 818 | return -EINVAL; |
a747b42c CG |
819 | } |
820 | ||
821 | #define get_static_reg_addr(regs, name, reg_addr) \ | |
822 | get_stat_reg_addr(regs, ARRAY_SIZE(regs), name, reg_addr) | |
823 | ||
3d9c54b5 | 824 | static ssize_t value_show(struct device *dev, struct device_attribute *attr, |
4d5f022f | 825 | char *buf) |
a4198cdf | 826 | { |
98a3c4d7 | 827 | const char *name = attr->attr.name; |
4d5f022f | 828 | struct most_dci_obj *dci_obj = to_dci_obj(dev); |
0e9b9d08 | 829 | u16 val; |
a4198cdf CG |
830 | u16 reg_addr; |
831 | int err; | |
832 | ||
549d2db7 | 833 | if (sysfs_streq(name, "arb_address")) |
cd455ebb | 834 | return sysfs_emit(buf, "%04x\n", dci_obj->reg_addr); |
98a3c4d7 | 835 | |
549d2db7 | 836 | if (sysfs_streq(name, "arb_value")) |
c0554645 | 837 | reg_addr = dci_obj->reg_addr; |
98a3c4d7 CG |
838 | else if (get_static_reg_addr(ro_regs, name, ®_addr) && |
839 | get_static_reg_addr(rw_regs, name, ®_addr)) | |
f470a5b0 | 840 | return -EINVAL; |
a4198cdf | 841 | |
0e9b9d08 | 842 | err = drci_rd_reg(dci_obj->usb_device, reg_addr, &val); |
a4198cdf CG |
843 | if (err < 0) |
844 | return err; | |
845 | ||
cd455ebb | 846 | return sysfs_emit(buf, "%04x\n", val); |
a4198cdf CG |
847 | } |
848 | ||
3d9c54b5 | 849 | static ssize_t value_store(struct device *dev, struct device_attribute *attr, |
a4198cdf CG |
850 | const char *buf, size_t count) |
851 | { | |
f1b9a843 | 852 | u16 val; |
a4198cdf | 853 | u16 reg_addr; |
98a3c4d7 | 854 | const char *name = attr->attr.name; |
4d5f022f | 855 | struct most_dci_obj *dci_obj = to_dci_obj(dev); |
e33269f6 | 856 | struct usb_device *usb_dev = dci_obj->usb_device; |
a0dbe1b2 | 857 | int err; |
a4198cdf | 858 | |
a0dbe1b2 | 859 | err = kstrtou16(buf, 16, &val); |
c0554645 CG |
860 | if (err) |
861 | return err; | |
862 | ||
549d2db7 | 863 | if (sysfs_streq(name, "arb_address")) { |
c0554645 CG |
864 | dci_obj->reg_addr = val; |
865 | return count; | |
866 | } | |
98a3c4d7 | 867 | |
549d2db7 | 868 | if (sysfs_streq(name, "arb_value")) |
e33269f6 | 869 | err = drci_wr_reg(usb_dev, dci_obj->reg_addr, val); |
549d2db7 | 870 | else if (sysfs_streq(name, "sync_ep")) |
e33269f6 | 871 | err = start_sync_ep(usb_dev, val); |
b2e8aa52 | 872 | else if (!get_static_reg_addr(rw_regs, name, ®_addr)) |
e33269f6 AS |
873 | err = drci_wr_reg(usb_dev, reg_addr, val); |
874 | else | |
f470a5b0 | 875 | return -EINVAL; |
a4198cdf | 876 | |
a4198cdf CG |
877 | if (err < 0) |
878 | return err; | |
879 | ||
880 | return count; | |
881 | } | |
882 | ||
f15e3ad3 CG |
883 | static DEVICE_ATTR(ni_state, 0444, value_show, NULL); |
884 | static DEVICE_ATTR(packet_bandwidth, 0444, value_show, NULL); | |
885 | static DEVICE_ATTR(node_address, 0444, value_show, NULL); | |
886 | static DEVICE_ATTR(node_position, 0444, value_show, NULL); | |
887 | static DEVICE_ATTR(sync_ep, 0200, NULL, value_store); | |
888 | static DEVICE_ATTR(mep_filter, 0644, value_show, value_store); | |
889 | static DEVICE_ATTR(mep_hash0, 0644, value_show, value_store); | |
890 | static DEVICE_ATTR(mep_hash1, 0644, value_show, value_store); | |
891 | static DEVICE_ATTR(mep_hash2, 0644, value_show, value_store); | |
892 | static DEVICE_ATTR(mep_hash3, 0644, value_show, value_store); | |
893 | static DEVICE_ATTR(mep_eui48_hi, 0644, value_show, value_store); | |
894 | static DEVICE_ATTR(mep_eui48_mi, 0644, value_show, value_store); | |
895 | static DEVICE_ATTR(mep_eui48_lo, 0644, value_show, value_store); | |
896 | static DEVICE_ATTR(arb_address, 0644, value_show, value_store); | |
897 | static DEVICE_ATTR(arb_value, 0644, value_show, value_store); | |
4d5f022f CG |
898 | |
899 | static struct attribute *dci_attrs[] = { | |
900 | &dev_attr_ni_state.attr, | |
901 | &dev_attr_packet_bandwidth.attr, | |
902 | &dev_attr_node_address.attr, | |
903 | &dev_attr_node_position.attr, | |
904 | &dev_attr_sync_ep.attr, | |
905 | &dev_attr_mep_filter.attr, | |
906 | &dev_attr_mep_hash0.attr, | |
907 | &dev_attr_mep_hash1.attr, | |
908 | &dev_attr_mep_hash2.attr, | |
909 | &dev_attr_mep_hash3.attr, | |
910 | &dev_attr_mep_eui48_hi.attr, | |
911 | &dev_attr_mep_eui48_mi.attr, | |
912 | &dev_attr_mep_eui48_lo.attr, | |
913 | &dev_attr_arb_address.attr, | |
914 | &dev_attr_arb_value.attr, | |
a4198cdf CG |
915 | NULL, |
916 | }; | |
917 | ||
dfeb9380 | 918 | ATTRIBUTE_GROUPS(dci); |
a4198cdf | 919 | |
869d3acd CG |
920 | static void release_dci(struct device *dev) |
921 | { | |
922 | struct most_dci_obj *dci = to_dci_obj(dev); | |
923 | ||
f1f48239 | 924 | put_device(dev->parent); |
869d3acd CG |
925 | kfree(dci); |
926 | } | |
927 | ||
723de0f9 CG |
928 | static void release_mdev(struct device *dev) |
929 | { | |
930 | struct most_dev *mdev = to_mdev_from_dev(dev); | |
931 | ||
932 | kfree(mdev); | |
933 | } | |
a4198cdf CG |
934 | /** |
935 | * hdm_probe - probe function of USB device driver | |
936 | * @interface: Interface of the attached USB device | |
937 | * @id: Pointer to the USB ID table. | |
938 | * | |
939 | * This allocates and initializes the device instance, adds the new | |
940 | * entry to the internal list, scans the USB descriptors and registers | |
941 | * the interface with the core. | |
942 | * Additionally, the DCI objects are created and the hardware is sync'd. | |
943 | * | |
944 | * Return 0 on success. In case of an error a negative number is returned. | |
945 | */ | |
946 | static int | |
947 | hdm_probe(struct usb_interface *interface, const struct usb_device_id *id) | |
948 | { | |
089612f1 CG |
949 | struct usb_host_interface *usb_iface_desc = interface->cur_altsetting; |
950 | struct usb_device *usb_dev = interface_to_usbdev(interface); | |
951 | struct device *dev = &usb_dev->dev; | |
a0dbe1b2 | 952 | struct most_dev *mdev; |
a4198cdf CG |
953 | unsigned int i; |
954 | unsigned int num_endpoints; | |
955 | struct most_channel_capability *tmp_cap; | |
a4198cdf | 956 | struct usb_endpoint_descriptor *ep_desc; |
c1a57be0 | 957 | int ret = -ENOMEM; |
a4198cdf | 958 | |
a0dbe1b2 | 959 | mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); |
a4198cdf | 960 | if (!mdev) |
c1a57be0 | 961 | return -ENOMEM; |
a4198cdf CG |
962 | |
963 | usb_set_intfdata(interface, mdev); | |
964 | num_endpoints = usb_iface_desc->desc.bNumEndpoints; | |
c1a57be0 CG |
965 | if (num_endpoints > MAX_NUM_ENDPOINTS) { |
966 | kfree(mdev); | |
967 | return -EINVAL; | |
968 | } | |
a4198cdf CG |
969 | mutex_init(&mdev->io_mutex); |
970 | INIT_WORK(&mdev->poll_work_obj, wq_netinfo); | |
e99e88a9 | 971 | timer_setup(&mdev->link_stat_timer, link_stat_timer_handler, 0); |
a4198cdf CG |
972 | |
973 | mdev->usb_device = usb_dev; | |
a4198cdf CG |
974 | mdev->link_stat_timer.expires = jiffies + (2 * HZ); |
975 | ||
976 | mdev->iface.mod = hdm_usb_fops.owner; | |
723de0f9 | 977 | mdev->iface.dev = &mdev->dev; |
69c90cf1 | 978 | mdev->iface.driver_dev = &interface->dev; |
a4198cdf CG |
979 | mdev->iface.interface = ITYPE_USB; |
980 | mdev->iface.configure = hdm_configure_channel; | |
981 | mdev->iface.request_netinfo = hdm_request_netinfo; | |
982 | mdev->iface.enqueue = hdm_enqueue; | |
983 | mdev->iface.poison_channel = hdm_poison_channel; | |
3598cec5 CG |
984 | mdev->iface.dma_alloc = hdm_dma_alloc; |
985 | mdev->iface.dma_free = hdm_dma_free; | |
a4198cdf CG |
986 | mdev->iface.description = mdev->description; |
987 | mdev->iface.num_channels = num_endpoints; | |
988 | ||
989 | snprintf(mdev->description, sizeof(mdev->description), | |
5b082c2e | 990 | "%d-%s:%d.%d", |
a4198cdf CG |
991 | usb_dev->bus->busnum, |
992 | usb_dev->devpath, | |
993 | usb_dev->config->desc.bConfigurationValue, | |
994 | usb_iface_desc->desc.bInterfaceNumber); | |
995 | ||
723de0f9 CG |
996 | mdev->dev.init_name = mdev->description; |
997 | mdev->dev.parent = &interface->dev; | |
998 | mdev->dev.release = release_mdev; | |
a4198cdf CG |
999 | mdev->conf = kcalloc(num_endpoints, sizeof(*mdev->conf), GFP_KERNEL); |
1000 | if (!mdev->conf) | |
bddd3c25 | 1001 | goto err_free_mdev; |
a4198cdf CG |
1002 | |
1003 | mdev->cap = kcalloc(num_endpoints, sizeof(*mdev->cap), GFP_KERNEL); | |
1004 | if (!mdev->cap) | |
bddd3c25 | 1005 | goto err_free_conf; |
a4198cdf CG |
1006 | |
1007 | mdev->iface.channel_vector = mdev->cap; | |
a4198cdf CG |
1008 | mdev->ep_address = |
1009 | kcalloc(num_endpoints, sizeof(*mdev->ep_address), GFP_KERNEL); | |
1010 | if (!mdev->ep_address) | |
bddd3c25 | 1011 | goto err_free_cap; |
a4198cdf | 1012 | |
27e6245e CG |
1013 | mdev->busy_urbs = |
1014 | kcalloc(num_endpoints, sizeof(*mdev->busy_urbs), GFP_KERNEL); | |
1015 | if (!mdev->busy_urbs) | |
bddd3c25 | 1016 | goto err_free_ep_address; |
a4198cdf CG |
1017 | |
1018 | tmp_cap = mdev->cap; | |
1019 | for (i = 0; i < num_endpoints; i++) { | |
1020 | ep_desc = &usb_iface_desc->endpoint[i].desc; | |
1021 | mdev->ep_address[i] = ep_desc->bEndpointAddress; | |
1022 | mdev->padding_active[i] = false; | |
1023 | mdev->is_channel_healthy[i] = true; | |
1024 | ||
1025 | snprintf(&mdev->suffix[i][0], MAX_SUFFIX_LEN, "ep%02x", | |
1026 | mdev->ep_address[i]); | |
1027 | ||
1028 | tmp_cap->name_suffix = &mdev->suffix[i][0]; | |
1029 | tmp_cap->buffer_size_packet = MAX_BUF_SIZE; | |
1030 | tmp_cap->buffer_size_streaming = MAX_BUF_SIZE; | |
1031 | tmp_cap->num_buffers_packet = BUF_CHAIN_SIZE; | |
1032 | tmp_cap->num_buffers_streaming = BUF_CHAIN_SIZE; | |
1033 | tmp_cap->data_type = MOST_CH_CONTROL | MOST_CH_ASYNC | | |
0540609f | 1034 | MOST_CH_ISOC | MOST_CH_SYNC; |
afd14cef | 1035 | if (usb_endpoint_dir_in(ep_desc)) |
a4198cdf CG |
1036 | tmp_cap->direction = MOST_CH_RX; |
1037 | else | |
1038 | tmp_cap->direction = MOST_CH_TX; | |
1039 | tmp_cap++; | |
27e6245e | 1040 | init_usb_anchor(&mdev->busy_urbs[i]); |
88d1878b | 1041 | spin_lock_init(&mdev->channel_lock[i]); |
a4198cdf | 1042 | } |
3dcf93fe CG |
1043 | dev_dbg(dev, "claimed gadget: Vendor=%4.4x ProdID=%4.4x Bus=%02x Device=%02x\n", |
1044 | le16_to_cpu(usb_dev->descriptor.idVendor), | |
1045 | le16_to_cpu(usb_dev->descriptor.idProduct), | |
1046 | usb_dev->bus->busnum, | |
1047 | usb_dev->devnum); | |
1048 | ||
1049 | dev_dbg(dev, "device path: /sys/bus/usb/devices/%d-%s:%d.%d\n", | |
1050 | usb_dev->bus->busnum, | |
1051 | usb_dev->devpath, | |
1052 | usb_dev->config->desc.bConfigurationValue, | |
1053 | usb_iface_desc->desc.bInterfaceNumber); | |
a4198cdf | 1054 | |
4d5f022f CG |
1055 | ret = most_register_interface(&mdev->iface); |
1056 | if (ret) | |
bddd3c25 | 1057 | goto err_free_busy_urbs; |
a4198cdf CG |
1058 | |
1059 | mutex_lock(&mdev->io_mutex); | |
654f7ec4 | 1060 | if (le16_to_cpu(usb_dev->descriptor.idProduct) == USB_DEV_ID_OS81118 || |
5bf9bd8d CG |
1061 | le16_to_cpu(usb_dev->descriptor.idProduct) == USB_DEV_ID_OS81119 || |
1062 | le16_to_cpu(usb_dev->descriptor.idProduct) == USB_DEV_ID_OS81210) { | |
4d5f022f | 1063 | mdev->dci = kzalloc(sizeof(*mdev->dci), GFP_KERNEL); |
a4198cdf CG |
1064 | if (!mdev->dci) { |
1065 | mutex_unlock(&mdev->io_mutex); | |
1066 | most_deregister_interface(&mdev->iface); | |
1067 | ret = -ENOMEM; | |
bddd3c25 | 1068 | goto err_free_busy_urbs; |
a4198cdf CG |
1069 | } |
1070 | ||
4d5f022f | 1071 | mdev->dci->dev.init_name = "dci"; |
723de0f9 | 1072 | mdev->dci->dev.parent = get_device(mdev->iface.dev); |
dfeb9380 | 1073 | mdev->dci->dev.groups = dci_groups; |
869d3acd | 1074 | mdev->dci->dev.release = release_dci; |
4d5f022f CG |
1075 | if (device_register(&mdev->dci->dev)) { |
1076 | mutex_unlock(&mdev->io_mutex); | |
1077 | most_deregister_interface(&mdev->iface); | |
1078 | ret = -ENOMEM; | |
bddd3c25 | 1079 | goto err_free_dci; |
4d5f022f | 1080 | } |
a4198cdf | 1081 | mdev->dci->usb_device = mdev->usb_device; |
a4198cdf CG |
1082 | } |
1083 | mutex_unlock(&mdev->io_mutex); | |
1084 | return 0; | |
bddd3c25 | 1085 | err_free_dci: |
723de0f9 | 1086 | put_device(&mdev->dci->dev); |
bddd3c25 | 1087 | err_free_busy_urbs: |
27e6245e | 1088 | kfree(mdev->busy_urbs); |
bddd3c25 | 1089 | err_free_ep_address: |
a4198cdf | 1090 | kfree(mdev->ep_address); |
bddd3c25 | 1091 | err_free_cap: |
a4198cdf | 1092 | kfree(mdev->cap); |
bddd3c25 | 1093 | err_free_conf: |
a4198cdf | 1094 | kfree(mdev->conf); |
bddd3c25 | 1095 | err_free_mdev: |
723de0f9 | 1096 | put_device(&mdev->dev); |
a4198cdf CG |
1097 | return ret; |
1098 | } | |
1099 | ||
1100 | /** | |
1101 | * hdm_disconnect - disconnect function of USB device driver | |
1102 | * @interface: Interface of the attached USB device | |
1103 | * | |
1104 | * This deregisters the interface with the core, removes the kernel timer | |
1105 | * and frees resources. | |
1106 | * | |
1107 | * Context: hub kernel thread | |
1108 | */ | |
1109 | static void hdm_disconnect(struct usb_interface *interface) | |
1110 | { | |
089612f1 | 1111 | struct most_dev *mdev = usb_get_intfdata(interface); |
a4198cdf | 1112 | |
a4198cdf CG |
1113 | mutex_lock(&mdev->io_mutex); |
1114 | usb_set_intfdata(interface, NULL); | |
1115 | mdev->usb_device = NULL; | |
1116 | mutex_unlock(&mdev->io_mutex); | |
1117 | ||
1118 | del_timer_sync(&mdev->link_stat_timer); | |
1119 | cancel_work_sync(&mdev->poll_work_obj); | |
1120 | ||
fc157998 CG |
1121 | if (mdev->dci) |
1122 | device_unregister(&mdev->dci->dev); | |
a4198cdf CG |
1123 | most_deregister_interface(&mdev->iface); |
1124 | ||
27e6245e | 1125 | kfree(mdev->busy_urbs); |
a4198cdf CG |
1126 | kfree(mdev->cap); |
1127 | kfree(mdev->conf); | |
1128 | kfree(mdev->ep_address); | |
f1f48239 | 1129 | put_device(&mdev->dci->dev); |
723de0f9 | 1130 | put_device(&mdev->dev); |
a4198cdf CG |
1131 | } |
1132 | ||
08e1b427 CG |
1133 | static int hdm_suspend(struct usb_interface *interface, pm_message_t message) |
1134 | { | |
1135 | struct most_dev *mdev = usb_get_intfdata(interface); | |
1136 | int i; | |
1137 | ||
1138 | mutex_lock(&mdev->io_mutex); | |
1139 | for (i = 0; i < mdev->iface.num_channels; i++) { | |
1140 | most_stop_enqueue(&mdev->iface, i); | |
1141 | usb_kill_anchored_urbs(&mdev->busy_urbs[i]); | |
1142 | } | |
1143 | mutex_unlock(&mdev->io_mutex); | |
1144 | return 0; | |
1145 | } | |
1146 | ||
1147 | static int hdm_resume(struct usb_interface *interface) | |
1148 | { | |
1149 | struct most_dev *mdev = usb_get_intfdata(interface); | |
1150 | int i; | |
1151 | ||
1152 | mutex_lock(&mdev->io_mutex); | |
1153 | for (i = 0; i < mdev->iface.num_channels; i++) | |
1154 | most_resume_enqueue(&mdev->iface, i); | |
1155 | mutex_unlock(&mdev->io_mutex); | |
1156 | return 0; | |
1157 | } | |
1158 | ||
a4198cdf CG |
1159 | static struct usb_driver hdm_usb = { |
1160 | .name = "hdm_usb", | |
1161 | .id_table = usbid, | |
1162 | .probe = hdm_probe, | |
1163 | .disconnect = hdm_disconnect, | |
08e1b427 CG |
1164 | .resume = hdm_resume, |
1165 | .suspend = hdm_suspend, | |
a4198cdf CG |
1166 | }; |
1167 | ||
b9d7adc4 | 1168 | module_usb_driver(hdm_usb); |
a4198cdf CG |
1169 | MODULE_LICENSE("GPL"); |
1170 | MODULE_AUTHOR("Christian Gromm <christian.gromm@microchip.com>"); | |
1171 | MODULE_DESCRIPTION("HDM_4_USB"); |