Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 1 | /* ----------------------------------------------------------------------------- |
| 2 | * Copyright (c) 2011 Ozmo Inc |
| 3 | * Released under the GNU General Public License Version 2 (GPLv2). |
| 4 | * |
| 5 | * This file implements the protocol specific parts of the USB service for a PD. |
| 6 | * ----------------------------------------------------------------------------- |
| 7 | */ |
| 8 | #include <linux/init.h> |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/timer.h> |
| 11 | #include <linux/sched.h> |
| 12 | #include <linux/netdevice.h> |
| 13 | #include <linux/errno.h> |
| 14 | #include <linux/input.h> |
| 15 | #include <asm/unaligned.h> |
| 16 | #include "ozconfig.h" |
| 17 | #include "ozprotocol.h" |
| 18 | #include "ozeltbuf.h" |
| 19 | #include "ozpd.h" |
| 20 | #include "ozproto.h" |
| 21 | #include "ozusbif.h" |
| 22 | #include "ozhcd.h" |
| 23 | #include "oztrace.h" |
Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 24 | #include "ozusbsvc.h" |
| 25 | #include "ozevent.h" |
| 26 | /*------------------------------------------------------------------------------ |
| 27 | */ |
| 28 | #define MAX_ISOC_FIXED_DATA (253-sizeof(struct oz_isoc_fixed)) |
| 29 | /*------------------------------------------------------------------------------ |
| 30 | * Context: softirq |
| 31 | */ |
| 32 | static int oz_usb_submit_elt(struct oz_elt_buf *eb, struct oz_elt_info *ei, |
| 33 | struct oz_usb_ctx *usb_ctx, u8 strid, u8 isoc) |
| 34 | { |
| 35 | int ret; |
| 36 | struct oz_elt *elt = (struct oz_elt *)ei->data; |
| 37 | struct oz_app_hdr *app_hdr = (struct oz_app_hdr *)(elt+1); |
| 38 | elt->type = OZ_ELT_APP_DATA; |
| 39 | ei->app_id = OZ_APPID_USB; |
| 40 | ei->length = elt->length + sizeof(struct oz_elt); |
| 41 | app_hdr->app_id = OZ_APPID_USB; |
| 42 | spin_lock_bh(&eb->lock); |
| 43 | if (isoc == 0) { |
| 44 | app_hdr->elt_seq_num = usb_ctx->tx_seq_num++; |
| 45 | if (usb_ctx->tx_seq_num == 0) |
| 46 | usb_ctx->tx_seq_num = 1; |
| 47 | } |
| 48 | ret = oz_queue_elt_info(eb, isoc, strid, ei); |
| 49 | if (ret) |
| 50 | oz_elt_info_free(eb, ei); |
| 51 | spin_unlock_bh(&eb->lock); |
| 52 | return ret; |
| 53 | } |
| 54 | /*------------------------------------------------------------------------------ |
| 55 | * Context: softirq |
| 56 | */ |
| 57 | int oz_usb_get_desc_req(void *hpd, u8 req_id, u8 req_type, u8 desc_type, |
| 58 | u8 index, u16 windex, int offset, int len) |
| 59 | { |
| 60 | struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd; |
| 61 | struct oz_pd *pd = usb_ctx->pd; |
| 62 | struct oz_elt *elt; |
| 63 | struct oz_get_desc_req *body; |
| 64 | struct oz_elt_buf *eb = &pd->elt_buff; |
| 65 | struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff); |
| 66 | oz_trace(" req_type = 0x%x\n", req_type); |
| 67 | oz_trace(" desc_type = 0x%x\n", desc_type); |
| 68 | oz_trace(" index = 0x%x\n", index); |
| 69 | oz_trace(" windex = 0x%x\n", windex); |
| 70 | oz_trace(" offset = 0x%x\n", offset); |
| 71 | oz_trace(" len = 0x%x\n", len); |
| 72 | if (len > 200) |
| 73 | len = 200; |
Peter Huewe | 4d1b2fb | 2013-02-15 15:22:23 +0100 | [diff] [blame] | 74 | if (ei == NULL) |
Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 75 | return -1; |
| 76 | elt = (struct oz_elt *)ei->data; |
| 77 | elt->length = sizeof(struct oz_get_desc_req); |
| 78 | body = (struct oz_get_desc_req *)(elt+1); |
| 79 | body->type = OZ_GET_DESC_REQ; |
| 80 | body->req_id = req_id; |
| 81 | put_unaligned(cpu_to_le16(offset), &body->offset); |
| 82 | put_unaligned(cpu_to_le16(len), &body->size); |
| 83 | body->req_type = req_type; |
| 84 | body->desc_type = desc_type; |
| 85 | body->w_index = windex; |
| 86 | body->index = index; |
| 87 | return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0); |
| 88 | } |
| 89 | /*------------------------------------------------------------------------------ |
| 90 | * Context: tasklet |
| 91 | */ |
| 92 | static int oz_usb_set_config_req(void *hpd, u8 req_id, u8 index) |
| 93 | { |
| 94 | struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd; |
| 95 | struct oz_pd *pd = usb_ctx->pd; |
| 96 | struct oz_elt *elt; |
| 97 | struct oz_elt_buf *eb = &pd->elt_buff; |
| 98 | struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff); |
| 99 | struct oz_set_config_req *body; |
Peter Huewe | 4d1b2fb | 2013-02-15 15:22:23 +0100 | [diff] [blame] | 100 | if (ei == NULL) |
Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 101 | return -1; |
| 102 | elt = (struct oz_elt *)ei->data; |
| 103 | elt->length = sizeof(struct oz_set_config_req); |
| 104 | body = (struct oz_set_config_req *)(elt+1); |
| 105 | body->type = OZ_SET_CONFIG_REQ; |
| 106 | body->req_id = req_id; |
| 107 | body->index = index; |
| 108 | return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0); |
| 109 | } |
| 110 | /*------------------------------------------------------------------------------ |
| 111 | * Context: tasklet |
| 112 | */ |
| 113 | static int oz_usb_set_interface_req(void *hpd, u8 req_id, u8 index, u8 alt) |
| 114 | { |
| 115 | struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd; |
| 116 | struct oz_pd *pd = usb_ctx->pd; |
| 117 | struct oz_elt *elt; |
| 118 | struct oz_elt_buf *eb = &pd->elt_buff; |
| 119 | struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff); |
| 120 | struct oz_set_interface_req *body; |
Peter Huewe | 4d1b2fb | 2013-02-15 15:22:23 +0100 | [diff] [blame] | 121 | if (ei == NULL) |
Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 122 | return -1; |
| 123 | elt = (struct oz_elt *)ei->data; |
| 124 | elt->length = sizeof(struct oz_set_interface_req); |
| 125 | body = (struct oz_set_interface_req *)(elt+1); |
| 126 | body->type = OZ_SET_INTERFACE_REQ; |
| 127 | body->req_id = req_id; |
| 128 | body->index = index; |
| 129 | body->alternative = alt; |
| 130 | return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0); |
| 131 | } |
| 132 | /*------------------------------------------------------------------------------ |
| 133 | * Context: tasklet |
| 134 | */ |
| 135 | static int oz_usb_set_clear_feature_req(void *hpd, u8 req_id, u8 type, |
| 136 | u8 recipient, u8 index, __le16 feature) |
| 137 | { |
| 138 | struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd; |
| 139 | struct oz_pd *pd = usb_ctx->pd; |
| 140 | struct oz_elt *elt; |
| 141 | struct oz_elt_buf *eb = &pd->elt_buff; |
| 142 | struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff); |
| 143 | struct oz_feature_req *body; |
Peter Huewe | 4d1b2fb | 2013-02-15 15:22:23 +0100 | [diff] [blame] | 144 | if (ei == NULL) |
Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 145 | return -1; |
| 146 | elt = (struct oz_elt *)ei->data; |
| 147 | elt->length = sizeof(struct oz_feature_req); |
| 148 | body = (struct oz_feature_req *)(elt+1); |
| 149 | body->type = type; |
| 150 | body->req_id = req_id; |
| 151 | body->recipient = recipient; |
| 152 | body->index = index; |
| 153 | put_unaligned(feature, &body->feature); |
| 154 | return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0); |
| 155 | } |
| 156 | /*------------------------------------------------------------------------------ |
| 157 | * Context: tasklet |
| 158 | */ |
| 159 | static int oz_usb_vendor_class_req(void *hpd, u8 req_id, u8 req_type, |
| 160 | u8 request, __le16 value, __le16 index, u8 *data, int data_len) |
| 161 | { |
| 162 | struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd; |
| 163 | struct oz_pd *pd = usb_ctx->pd; |
| 164 | struct oz_elt *elt; |
| 165 | struct oz_elt_buf *eb = &pd->elt_buff; |
| 166 | struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff); |
| 167 | struct oz_vendor_class_req *body; |
Peter Huewe | 4d1b2fb | 2013-02-15 15:22:23 +0100 | [diff] [blame] | 168 | if (ei == NULL) |
Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 169 | return -1; |
| 170 | elt = (struct oz_elt *)ei->data; |
| 171 | elt->length = sizeof(struct oz_vendor_class_req) - 1 + data_len; |
| 172 | body = (struct oz_vendor_class_req *)(elt+1); |
| 173 | body->type = OZ_VENDOR_CLASS_REQ; |
| 174 | body->req_id = req_id; |
| 175 | body->req_type = req_type; |
| 176 | body->request = request; |
| 177 | put_unaligned(value, &body->value); |
| 178 | put_unaligned(index, &body->index); |
| 179 | if (data_len) |
| 180 | memcpy(body->data, data, data_len); |
| 181 | return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0); |
| 182 | } |
| 183 | /*------------------------------------------------------------------------------ |
| 184 | * Context: tasklet |
| 185 | */ |
| 186 | int oz_usb_control_req(void *hpd, u8 req_id, struct usb_ctrlrequest *setup, |
| 187 | u8 *data, int data_len) |
| 188 | { |
| 189 | unsigned wvalue = le16_to_cpu(setup->wValue); |
| 190 | unsigned windex = le16_to_cpu(setup->wIndex); |
| 191 | unsigned wlength = le16_to_cpu(setup->wLength); |
| 192 | int rc = 0; |
| 193 | oz_event_log(OZ_EVT_CTRL_REQ, setup->bRequest, req_id, |
| 194 | (void *)(((unsigned long)(setup->wValue))<<16 | |
| 195 | ((unsigned long)setup->wIndex)), |
| 196 | setup->bRequestType); |
| 197 | if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { |
| 198 | switch (setup->bRequest) { |
| 199 | case USB_REQ_GET_DESCRIPTOR: |
| 200 | rc = oz_usb_get_desc_req(hpd, req_id, |
| 201 | setup->bRequestType, (u8)(wvalue>>8), |
| 202 | (u8)wvalue, setup->wIndex, 0, wlength); |
| 203 | break; |
| 204 | case USB_REQ_SET_CONFIGURATION: |
| 205 | rc = oz_usb_set_config_req(hpd, req_id, (u8)wvalue); |
| 206 | break; |
| 207 | case USB_REQ_SET_INTERFACE: { |
| 208 | u8 if_num = (u8)windex; |
| 209 | u8 alt = (u8)wvalue; |
| 210 | rc = oz_usb_set_interface_req(hpd, req_id, |
| 211 | if_num, alt); |
| 212 | } |
| 213 | break; |
| 214 | case USB_REQ_SET_FEATURE: |
| 215 | rc = oz_usb_set_clear_feature_req(hpd, req_id, |
| 216 | OZ_SET_FEATURE_REQ, |
| 217 | setup->bRequestType & 0xf, (u8)windex, |
| 218 | setup->wValue); |
| 219 | break; |
| 220 | case USB_REQ_CLEAR_FEATURE: |
| 221 | rc = oz_usb_set_clear_feature_req(hpd, req_id, |
| 222 | OZ_CLEAR_FEATURE_REQ, |
| 223 | setup->bRequestType & 0xf, |
| 224 | (u8)windex, setup->wValue); |
| 225 | break; |
| 226 | } |
| 227 | } else { |
| 228 | rc = oz_usb_vendor_class_req(hpd, req_id, setup->bRequestType, |
| 229 | setup->bRequest, setup->wValue, setup->wIndex, |
| 230 | data, data_len); |
| 231 | } |
| 232 | return rc; |
| 233 | } |
| 234 | /*------------------------------------------------------------------------------ |
| 235 | * Context: softirq |
| 236 | */ |
| 237 | int oz_usb_send_isoc(void *hpd, u8 ep_num, struct urb *urb) |
| 238 | { |
| 239 | struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd; |
| 240 | struct oz_pd *pd = usb_ctx->pd; |
| 241 | struct oz_elt_buf *eb; |
| 242 | int i; |
| 243 | int hdr_size; |
| 244 | u8 *data; |
| 245 | struct usb_iso_packet_descriptor *desc; |
| 246 | |
| 247 | if (pd->mode & OZ_F_ISOC_NO_ELTS) { |
| 248 | for (i = 0; i < urb->number_of_packets; i++) { |
| 249 | u8 *data; |
| 250 | desc = &urb->iso_frame_desc[i]; |
| 251 | data = ((u8 *)urb->transfer_buffer)+desc->offset; |
| 252 | oz_send_isoc_unit(pd, ep_num, data, desc->length); |
| 253 | } |
| 254 | return 0; |
| 255 | } |
| 256 | |
| 257 | hdr_size = sizeof(struct oz_isoc_fixed) - 1; |
| 258 | eb = &pd->elt_buff; |
| 259 | i = 0; |
| 260 | while (i < urb->number_of_packets) { |
| 261 | struct oz_elt_info *ei = oz_elt_info_alloc(eb); |
| 262 | struct oz_elt *elt; |
| 263 | struct oz_isoc_fixed *body; |
| 264 | int unit_count; |
| 265 | int unit_size; |
| 266 | int rem; |
Peter Huewe | 4d1b2fb | 2013-02-15 15:22:23 +0100 | [diff] [blame] | 267 | if (ei == NULL) |
Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 268 | return -1; |
| 269 | rem = MAX_ISOC_FIXED_DATA; |
| 270 | elt = (struct oz_elt *)ei->data; |
| 271 | body = (struct oz_isoc_fixed *)(elt + 1); |
| 272 | body->type = OZ_USB_ENDPOINT_DATA; |
| 273 | body->endpoint = ep_num; |
| 274 | body->format = OZ_DATA_F_ISOC_FIXED; |
| 275 | unit_size = urb->iso_frame_desc[i].length; |
| 276 | body->unit_size = (u8)unit_size; |
| 277 | data = ((u8 *)(elt+1)) + hdr_size; |
| 278 | unit_count = 0; |
| 279 | while (i < urb->number_of_packets) { |
| 280 | desc = &urb->iso_frame_desc[i]; |
| 281 | if ((unit_size == desc->length) && |
| 282 | (desc->length <= rem)) { |
| 283 | memcpy(data, ((u8 *)urb->transfer_buffer) + |
| 284 | desc->offset, unit_size); |
| 285 | data += unit_size; |
| 286 | rem -= unit_size; |
| 287 | unit_count++; |
| 288 | desc->status = 0; |
| 289 | desc->actual_length = desc->length; |
| 290 | i++; |
| 291 | } else { |
| 292 | break; |
| 293 | } |
| 294 | } |
| 295 | elt->length = hdr_size + MAX_ISOC_FIXED_DATA - rem; |
| 296 | /* Store the number of units in body->frame_number for the |
| 297 | * moment. This field will be correctly determined before |
| 298 | * the element is sent. */ |
| 299 | body->frame_number = (u8)unit_count; |
| 300 | oz_usb_submit_elt(eb, ei, usb_ctx, ep_num, |
| 301 | pd->mode & OZ_F_ISOC_ANYTIME); |
| 302 | } |
| 303 | return 0; |
| 304 | } |
| 305 | /*------------------------------------------------------------------------------ |
| 306 | * Context: softirq-serialized |
| 307 | */ |
Peter Huewe | a7f74c3 | 2013-02-15 21:17:22 +0100 | [diff] [blame^] | 308 | static void oz_usb_handle_ep_data(struct oz_usb_ctx *usb_ctx, |
Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 309 | struct oz_usb_hdr *usb_hdr, int len) |
| 310 | { |
| 311 | struct oz_data *data_hdr = (struct oz_data *)usb_hdr; |
| 312 | switch (data_hdr->format) { |
| 313 | case OZ_DATA_F_MULTIPLE_FIXED: { |
| 314 | struct oz_multiple_fixed *body = |
| 315 | (struct oz_multiple_fixed *)data_hdr; |
| 316 | u8 *data = body->data; |
| 317 | int n = (len - sizeof(struct oz_multiple_fixed)+1) |
| 318 | / body->unit_size; |
| 319 | while (n--) { |
| 320 | oz_hcd_data_ind(usb_ctx->hport, body->endpoint, |
| 321 | data, body->unit_size); |
| 322 | data += body->unit_size; |
| 323 | } |
| 324 | } |
| 325 | break; |
| 326 | case OZ_DATA_F_ISOC_FIXED: { |
| 327 | struct oz_isoc_fixed *body = |
| 328 | (struct oz_isoc_fixed *)data_hdr; |
| 329 | int data_len = len-sizeof(struct oz_isoc_fixed)+1; |
| 330 | int unit_size = body->unit_size; |
| 331 | u8 *data = body->data; |
| 332 | int count; |
| 333 | int i; |
| 334 | if (!unit_size) |
| 335 | break; |
| 336 | count = data_len/unit_size; |
| 337 | for (i = 0; i < count; i++) { |
| 338 | oz_hcd_data_ind(usb_ctx->hport, |
| 339 | body->endpoint, data, unit_size); |
| 340 | data += unit_size; |
| 341 | } |
| 342 | } |
| 343 | break; |
| 344 | } |
| 345 | |
| 346 | } |
| 347 | /*------------------------------------------------------------------------------ |
| 348 | * This is called when the PD has received a USB element. The type of element |
| 349 | * is determined and is then passed to an appropriate handler function. |
| 350 | * Context: softirq-serialized |
| 351 | */ |
| 352 | void oz_usb_rx(struct oz_pd *pd, struct oz_elt *elt) |
| 353 | { |
| 354 | struct oz_usb_hdr *usb_hdr = (struct oz_usb_hdr *)(elt + 1); |
| 355 | struct oz_usb_ctx *usb_ctx; |
| 356 | |
| 357 | spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]); |
| 358 | usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1]; |
| 359 | if (usb_ctx) |
| 360 | oz_usb_get(usb_ctx); |
| 361 | spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]); |
Peter Huewe | 4d1b2fb | 2013-02-15 15:22:23 +0100 | [diff] [blame] | 362 | if (usb_ctx == NULL) |
Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 363 | return; /* Context has gone so nothing to do. */ |
| 364 | if (usb_ctx->stopped) |
| 365 | goto done; |
| 366 | /* If sequence number is non-zero then check it is not a duplicate. |
| 367 | * Zero sequence numbers are always accepted. |
| 368 | */ |
| 369 | if (usb_hdr->elt_seq_num != 0) { |
| 370 | if (((usb_ctx->rx_seq_num - usb_hdr->elt_seq_num) & 0x80) == 0) |
| 371 | /* Reject duplicate element. */ |
| 372 | goto done; |
| 373 | } |
| 374 | usb_ctx->rx_seq_num = usb_hdr->elt_seq_num; |
| 375 | switch (usb_hdr->type) { |
| 376 | case OZ_GET_DESC_RSP: { |
| 377 | struct oz_get_desc_rsp *body = |
| 378 | (struct oz_get_desc_rsp *)usb_hdr; |
| 379 | int data_len = elt->length - |
| 380 | sizeof(struct oz_get_desc_rsp) + 1; |
| 381 | u16 offs = le16_to_cpu(get_unaligned(&body->offset)); |
| 382 | u16 total_size = |
| 383 | le16_to_cpu(get_unaligned(&body->total_size)); |
| 384 | oz_trace("USB_REQ_GET_DESCRIPTOR - cnf\n"); |
| 385 | oz_hcd_get_desc_cnf(usb_ctx->hport, body->req_id, |
| 386 | body->rcode, body->data, |
| 387 | data_len, offs, total_size); |
| 388 | } |
| 389 | break; |
| 390 | case OZ_SET_CONFIG_RSP: { |
| 391 | struct oz_set_config_rsp *body = |
| 392 | (struct oz_set_config_rsp *)usb_hdr; |
| 393 | oz_hcd_control_cnf(usb_ctx->hport, body->req_id, |
Peter Huewe | 4d1b2fb | 2013-02-15 15:22:23 +0100 | [diff] [blame] | 394 | body->rcode, NULL, 0); |
Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 395 | } |
| 396 | break; |
| 397 | case OZ_SET_INTERFACE_RSP: { |
| 398 | struct oz_set_interface_rsp *body = |
| 399 | (struct oz_set_interface_rsp *)usb_hdr; |
| 400 | oz_hcd_control_cnf(usb_ctx->hport, |
Peter Huewe | 4d1b2fb | 2013-02-15 15:22:23 +0100 | [diff] [blame] | 401 | body->req_id, body->rcode, NULL, 0); |
Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 402 | } |
| 403 | break; |
| 404 | case OZ_VENDOR_CLASS_RSP: { |
| 405 | struct oz_vendor_class_rsp *body = |
| 406 | (struct oz_vendor_class_rsp *)usb_hdr; |
| 407 | oz_hcd_control_cnf(usb_ctx->hport, body->req_id, |
| 408 | body->rcode, body->data, elt->length- |
| 409 | sizeof(struct oz_vendor_class_rsp)+1); |
| 410 | } |
| 411 | break; |
| 412 | case OZ_USB_ENDPOINT_DATA: |
| 413 | oz_usb_handle_ep_data(usb_ctx, usb_hdr, elt->length); |
| 414 | break; |
| 415 | } |
| 416 | done: |
| 417 | oz_usb_put(usb_ctx); |
| 418 | } |
| 419 | /*------------------------------------------------------------------------------ |
| 420 | * Context: softirq, process |
| 421 | */ |
| 422 | void oz_usb_farewell(struct oz_pd *pd, u8 ep_num, u8 *data, u8 len) |
| 423 | { |
| 424 | struct oz_usb_ctx *usb_ctx; |
| 425 | spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]); |
| 426 | usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1]; |
| 427 | if (usb_ctx) |
| 428 | oz_usb_get(usb_ctx); |
| 429 | spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]); |
Peter Huewe | 4d1b2fb | 2013-02-15 15:22:23 +0100 | [diff] [blame] | 430 | if (usb_ctx == NULL) |
Chris Kelly | b314786 | 2012-02-20 21:12:08 +0000 | [diff] [blame] | 431 | return; /* Context has gone so nothing to do. */ |
| 432 | if (!usb_ctx->stopped) { |
| 433 | oz_trace("Farewell indicated ep = 0x%x\n", ep_num); |
| 434 | oz_hcd_data_ind(usb_ctx->hport, ep_num, data, len); |
| 435 | } |
| 436 | oz_usb_put(usb_ctx); |
| 437 | } |