Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 1 | /* |
| 2 | * hcd_queue.c - DesignWare HS OTG Controller host queuing routines |
| 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 functions to manage Queue Heads and Queue |
| 39 | * Transfer Descriptors for Host mode |
| 40 | */ |
| 41 | #include <linux/kernel.h> |
| 42 | #include <linux/module.h> |
| 43 | #include <linux/spinlock.h> |
| 44 | #include <linux/interrupt.h> |
| 45 | #include <linux/dma-mapping.h> |
| 46 | #include <linux/io.h> |
| 47 | #include <linux/slab.h> |
| 48 | #include <linux/usb.h> |
| 49 | |
| 50 | #include <linux/usb/hcd.h> |
| 51 | #include <linux/usb/ch11.h> |
| 52 | |
| 53 | #include "core.h" |
| 54 | #include "hcd.h" |
| 55 | |
Douglas Anderson | 17dd5b6 | 2016-01-28 18:19:59 -0800 | [diff] [blame] | 56 | /* Wait this long before releasing periodic reservation */ |
| 57 | #define DWC2_UNRESERVE_DELAY (msecs_to_jiffies(5)) |
| 58 | |
| 59 | /** |
Douglas Anderson | b951c6c | 2016-01-28 18:20:05 -0800 | [diff] [blame^] | 60 | * dwc2_periodic_channel_available() - Checks that a channel is available for a |
| 61 | * periodic transfer |
| 62 | * |
| 63 | * @hsotg: The HCD state structure for the DWC OTG controller |
| 64 | * |
| 65 | * Return: 0 if successful, negative error code otherwise |
| 66 | */ |
| 67 | static int dwc2_periodic_channel_available(struct dwc2_hsotg *hsotg) |
| 68 | { |
| 69 | /* |
| 70 | * Currently assuming that there is a dedicated host channel for |
| 71 | * each periodic transaction plus at least one host channel for |
| 72 | * non-periodic transactions |
| 73 | */ |
| 74 | int status; |
| 75 | int num_channels; |
| 76 | |
| 77 | num_channels = hsotg->core_params->host_channels; |
| 78 | if (hsotg->periodic_channels + hsotg->non_periodic_channels < |
| 79 | num_channels |
| 80 | && hsotg->periodic_channels < num_channels - 1) { |
| 81 | status = 0; |
| 82 | } else { |
| 83 | dev_dbg(hsotg->dev, |
| 84 | "%s: Total channels: %d, Periodic: %d, " |
| 85 | "Non-periodic: %d\n", __func__, num_channels, |
| 86 | hsotg->periodic_channels, hsotg->non_periodic_channels); |
| 87 | status = -ENOSPC; |
| 88 | } |
| 89 | |
| 90 | return status; |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * dwc2_check_periodic_bandwidth() - Checks that there is sufficient bandwidth |
| 95 | * for the specified QH in the periodic schedule |
| 96 | * |
| 97 | * @hsotg: The HCD state structure for the DWC OTG controller |
| 98 | * @qh: QH containing periodic bandwidth required |
| 99 | * |
| 100 | * Return: 0 if successful, negative error code otherwise |
| 101 | * |
| 102 | * For simplicity, this calculation assumes that all the transfers in the |
| 103 | * periodic schedule may occur in the same (micro)frame |
| 104 | */ |
| 105 | static int dwc2_check_periodic_bandwidth(struct dwc2_hsotg *hsotg, |
| 106 | struct dwc2_qh *qh) |
| 107 | { |
| 108 | int status; |
| 109 | s16 max_claimed_usecs; |
| 110 | |
| 111 | status = 0; |
| 112 | |
| 113 | if (qh->dev_speed == USB_SPEED_HIGH || qh->do_split) { |
| 114 | /* |
| 115 | * High speed mode |
| 116 | * Max periodic usecs is 80% x 125 usec = 100 usec |
| 117 | */ |
| 118 | max_claimed_usecs = 100 - qh->host_us; |
| 119 | } else { |
| 120 | /* |
| 121 | * Full speed mode |
| 122 | * Max periodic usecs is 90% x 1000 usec = 900 usec |
| 123 | */ |
| 124 | max_claimed_usecs = 900 - qh->host_us; |
| 125 | } |
| 126 | |
| 127 | if (hsotg->periodic_usecs > max_claimed_usecs) { |
| 128 | dev_err(hsotg->dev, |
| 129 | "%s: already claimed usecs %d, required usecs %d\n", |
| 130 | __func__, hsotg->periodic_usecs, qh->host_us); |
| 131 | status = -ENOSPC; |
| 132 | } |
| 133 | |
| 134 | return status; |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Microframe scheduler |
| 139 | * track the total use in hsotg->frame_usecs |
| 140 | * keep each qh use in qh->frame_usecs |
| 141 | * when surrendering the qh then donate the time back |
| 142 | */ |
| 143 | static const unsigned short max_uframe_usecs[] = { |
| 144 | 100, 100, 100, 100, 100, 100, 30, 0 |
| 145 | }; |
| 146 | |
| 147 | void dwc2_hcd_init_usecs(struct dwc2_hsotg *hsotg) |
| 148 | { |
| 149 | int i; |
| 150 | |
| 151 | for (i = 0; i < 8; i++) |
| 152 | hsotg->frame_usecs[i] = max_uframe_usecs[i]; |
| 153 | } |
| 154 | |
| 155 | static int dwc2_find_single_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) |
| 156 | { |
| 157 | unsigned short utime = qh->host_us; |
| 158 | int i; |
| 159 | |
| 160 | for (i = 0; i < 8; i++) { |
| 161 | /* At the start hsotg->frame_usecs[i] = max_uframe_usecs[i] */ |
| 162 | if (utime <= hsotg->frame_usecs[i]) { |
| 163 | hsotg->frame_usecs[i] -= utime; |
| 164 | qh->frame_usecs[i] += utime; |
| 165 | return i; |
| 166 | } |
| 167 | } |
| 168 | return -ENOSPC; |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * use this for FS apps that can span multiple uframes |
| 173 | */ |
| 174 | static int dwc2_find_multi_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) |
| 175 | { |
| 176 | unsigned short utime = qh->host_us; |
| 177 | unsigned short xtime; |
| 178 | int t_left; |
| 179 | int i; |
| 180 | int j; |
| 181 | int k; |
| 182 | |
| 183 | for (i = 0; i < 8; i++) { |
| 184 | if (hsotg->frame_usecs[i] <= 0) |
| 185 | continue; |
| 186 | |
| 187 | /* |
| 188 | * we need n consecutive slots so use j as a start slot |
| 189 | * j plus j+1 must be enough time (for now) |
| 190 | */ |
| 191 | xtime = hsotg->frame_usecs[i]; |
| 192 | for (j = i + 1; j < 8; j++) { |
| 193 | /* |
| 194 | * if we add this frame remaining time to xtime we may |
| 195 | * be OK, if not we need to test j for a complete frame |
| 196 | */ |
| 197 | if (xtime + hsotg->frame_usecs[j] < utime) { |
| 198 | if (hsotg->frame_usecs[j] < |
| 199 | max_uframe_usecs[j]) |
| 200 | continue; |
| 201 | } |
| 202 | if (xtime >= utime) { |
| 203 | t_left = utime; |
| 204 | for (k = i; k < 8; k++) { |
| 205 | t_left -= hsotg->frame_usecs[k]; |
| 206 | if (t_left <= 0) { |
| 207 | qh->frame_usecs[k] += |
| 208 | hsotg->frame_usecs[k] |
| 209 | + t_left; |
| 210 | hsotg->frame_usecs[k] = -t_left; |
| 211 | return i; |
| 212 | } else { |
| 213 | qh->frame_usecs[k] += |
| 214 | hsotg->frame_usecs[k]; |
| 215 | hsotg->frame_usecs[k] = 0; |
| 216 | } |
| 217 | } |
| 218 | } |
| 219 | /* add the frame time to x time */ |
| 220 | xtime += hsotg->frame_usecs[j]; |
| 221 | /* we must have a fully available next frame or break */ |
| 222 | if (xtime < utime && |
| 223 | hsotg->frame_usecs[j] == max_uframe_usecs[j]) |
| 224 | continue; |
| 225 | } |
| 226 | } |
| 227 | return -ENOSPC; |
| 228 | } |
| 229 | |
| 230 | static int dwc2_find_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) |
| 231 | { |
| 232 | int ret; |
| 233 | |
| 234 | if (qh->dev_speed == USB_SPEED_HIGH) { |
| 235 | /* if this is a hs transaction we need a full frame */ |
| 236 | ret = dwc2_find_single_uframe(hsotg, qh); |
| 237 | } else { |
| 238 | /* |
| 239 | * if this is a fs transaction we may need a sequence |
| 240 | * of frames |
| 241 | */ |
| 242 | ret = dwc2_find_multi_uframe(hsotg, qh); |
| 243 | } |
| 244 | return ret; |
| 245 | } |
| 246 | |
| 247 | /** |
Douglas Anderson | 17dd5b6 | 2016-01-28 18:19:59 -0800 | [diff] [blame] | 248 | * dwc2_do_unreserve() - Actually release the periodic reservation |
| 249 | * |
| 250 | * This function actually releases the periodic bandwidth that was reserved |
| 251 | * by the given qh. |
| 252 | * |
| 253 | * @hsotg: The HCD state structure for the DWC OTG controller |
| 254 | * @qh: QH for the periodic transfer. |
| 255 | */ |
| 256 | static void dwc2_do_unreserve(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) |
| 257 | { |
| 258 | assert_spin_locked(&hsotg->lock); |
| 259 | |
| 260 | WARN_ON(!qh->unreserve_pending); |
| 261 | |
| 262 | /* No more unreserve pending--we're doing it */ |
| 263 | qh->unreserve_pending = false; |
| 264 | |
| 265 | if (WARN_ON(!list_empty(&qh->qh_list_entry))) |
| 266 | list_del_init(&qh->qh_list_entry); |
| 267 | |
| 268 | /* Update claimed usecs per (micro)frame */ |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 269 | hsotg->periodic_usecs -= qh->host_us; |
Douglas Anderson | 17dd5b6 | 2016-01-28 18:19:59 -0800 | [diff] [blame] | 270 | |
| 271 | if (hsotg->core_params->uframe_sched > 0) { |
| 272 | int i; |
| 273 | |
| 274 | for (i = 0; i < 8; i++) { |
| 275 | hsotg->frame_usecs[i] += qh->frame_usecs[i]; |
| 276 | qh->frame_usecs[i] = 0; |
| 277 | } |
| 278 | } else { |
| 279 | /* Release periodic channel reservation */ |
| 280 | hsotg->periodic_channels--; |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * dwc2_unreserve_timer_fn() - Timer function to release periodic reservation |
| 286 | * |
| 287 | * According to the kernel doc for usb_submit_urb() (specifically the part about |
| 288 | * "Reserved Bandwidth Transfers"), we need to keep a reservation active as |
| 289 | * long as a device driver keeps submitting. Since we're using HCD_BH to give |
| 290 | * back the URB we need to give the driver a little bit of time before we |
| 291 | * release the reservation. This worker is called after the appropriate |
| 292 | * delay. |
| 293 | * |
| 294 | * @work: Pointer to a qh unreserve_work. |
| 295 | */ |
| 296 | static void dwc2_unreserve_timer_fn(unsigned long data) |
| 297 | { |
| 298 | struct dwc2_qh *qh = (struct dwc2_qh *)data; |
| 299 | struct dwc2_hsotg *hsotg = qh->hsotg; |
| 300 | unsigned long flags; |
| 301 | |
| 302 | /* |
| 303 | * Wait for the lock, or for us to be scheduled again. We |
| 304 | * could be scheduled again if: |
| 305 | * - We started executing but didn't get the lock yet. |
| 306 | * - A new reservation came in, but cancel didn't take effect |
| 307 | * because we already started executing. |
| 308 | * - The timer has been kicked again. |
| 309 | * In that case cancel and wait for the next call. |
| 310 | */ |
| 311 | while (!spin_trylock_irqsave(&hsotg->lock, flags)) { |
| 312 | if (timer_pending(&qh->unreserve_timer)) |
| 313 | return; |
| 314 | } |
| 315 | |
| 316 | /* |
| 317 | * Might be no more unreserve pending if: |
| 318 | * - We started executing but didn't get the lock yet. |
| 319 | * - A new reservation came in, but cancel didn't take effect |
| 320 | * because we already started executing. |
| 321 | * |
| 322 | * We can't put this in the loop above because unreserve_pending needs |
| 323 | * to be accessed under lock, so we can only check it once we got the |
| 324 | * lock. |
| 325 | */ |
| 326 | if (qh->unreserve_pending) |
| 327 | dwc2_do_unreserve(hsotg, qh); |
| 328 | |
| 329 | spin_unlock_irqrestore(&hsotg->lock, flags); |
| 330 | } |
| 331 | |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 332 | /** |
Douglas Anderson | b951c6c | 2016-01-28 18:20:05 -0800 | [diff] [blame^] | 333 | * dwc2_check_max_xfer_size() - Checks that the max transfer size allowed in a |
| 334 | * host channel is large enough to handle the maximum data transfer in a single |
| 335 | * (micro)frame for a periodic transfer |
| 336 | * |
| 337 | * @hsotg: The HCD state structure for the DWC OTG controller |
| 338 | * @qh: QH for a periodic endpoint |
| 339 | * |
| 340 | * Return: 0 if successful, negative error code otherwise |
| 341 | */ |
| 342 | static int dwc2_check_max_xfer_size(struct dwc2_hsotg *hsotg, |
| 343 | struct dwc2_qh *qh) |
| 344 | { |
| 345 | u32 max_xfer_size; |
| 346 | u32 max_channel_xfer_size; |
| 347 | int status = 0; |
| 348 | |
| 349 | max_xfer_size = dwc2_max_packet(qh->maxp) * dwc2_hb_mult(qh->maxp); |
| 350 | max_channel_xfer_size = hsotg->core_params->max_transfer_size; |
| 351 | |
| 352 | if (max_xfer_size > max_channel_xfer_size) { |
| 353 | dev_err(hsotg->dev, |
| 354 | "%s: Periodic xfer length %d > max xfer length for channel %d\n", |
| 355 | __func__, max_xfer_size, max_channel_xfer_size); |
| 356 | status = -ENOSPC; |
| 357 | } |
| 358 | |
| 359 | return status; |
| 360 | } |
| 361 | |
| 362 | /** |
| 363 | * dwc2_schedule_periodic() - Schedules an interrupt or isochronous transfer in |
| 364 | * the periodic schedule |
| 365 | * |
| 366 | * @hsotg: The HCD state structure for the DWC OTG controller |
| 367 | * @qh: QH for the periodic transfer. The QH should already contain the |
| 368 | * scheduling information. |
| 369 | * |
| 370 | * Return: 0 if successful, negative error code otherwise |
| 371 | */ |
| 372 | static int dwc2_schedule_periodic(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) |
| 373 | { |
| 374 | int status; |
| 375 | |
| 376 | status = dwc2_check_max_xfer_size(hsotg, qh); |
| 377 | if (status) { |
| 378 | dev_dbg(hsotg->dev, |
| 379 | "%s: Channel max transfer size too small for periodic transfer\n", |
| 380 | __func__); |
| 381 | return status; |
| 382 | } |
| 383 | |
| 384 | /* Cancel pending unreserve; if canceled OK, unreserve was pending */ |
| 385 | if (del_timer(&qh->unreserve_timer)) |
| 386 | WARN_ON(!qh->unreserve_pending); |
| 387 | |
| 388 | /* |
| 389 | * Only need to reserve if there's not an unreserve pending, since if an |
| 390 | * unreserve is pending then by definition our old reservation is still |
| 391 | * valid. Unreserve might still be pending even if we didn't cancel if |
| 392 | * dwc2_unreserve_timer_fn() already started. Code in the timer handles |
| 393 | * that case. |
| 394 | */ |
| 395 | if (!qh->unreserve_pending) { |
| 396 | if (hsotg->core_params->uframe_sched > 0) { |
| 397 | int frame = -1; |
| 398 | |
| 399 | status = dwc2_find_uframe(hsotg, qh); |
| 400 | if (status == 0) |
| 401 | frame = 7; |
| 402 | else if (status > 0) |
| 403 | frame = status - 1; |
| 404 | |
| 405 | /* Set the new frame up */ |
| 406 | if (frame >= 0) { |
| 407 | qh->next_active_frame &= ~0x7; |
| 408 | qh->next_active_frame |= (frame & 7); |
| 409 | dwc2_sch_dbg(hsotg, |
| 410 | "QH=%p sched_p nxt=%04x, uf=%d\n", |
| 411 | qh, qh->next_active_frame, frame); |
| 412 | } |
| 413 | |
| 414 | if (status > 0) |
| 415 | status = 0; |
| 416 | } else { |
| 417 | status = dwc2_periodic_channel_available(hsotg); |
| 418 | if (status) { |
| 419 | dev_info(hsotg->dev, |
| 420 | "%s: No host channel available for periodic transfer\n", |
| 421 | __func__); |
| 422 | return status; |
| 423 | } |
| 424 | |
| 425 | status = dwc2_check_periodic_bandwidth(hsotg, qh); |
| 426 | } |
| 427 | |
| 428 | if (status) { |
| 429 | dev_dbg(hsotg->dev, |
| 430 | "%s: Insufficient periodic bandwidth for periodic transfer\n", |
| 431 | __func__); |
| 432 | return status; |
| 433 | } |
| 434 | |
| 435 | if (hsotg->core_params->uframe_sched <= 0) |
| 436 | /* Reserve periodic channel */ |
| 437 | hsotg->periodic_channels++; |
| 438 | |
| 439 | /* Update claimed usecs per (micro)frame */ |
| 440 | hsotg->periodic_usecs += qh->host_us; |
| 441 | } |
| 442 | |
| 443 | qh->unreserve_pending = 0; |
| 444 | |
| 445 | if (hsotg->core_params->dma_desc_enable > 0) |
| 446 | /* Don't rely on SOF and start in ready schedule */ |
| 447 | list_add_tail(&qh->qh_list_entry, &hsotg->periodic_sched_ready); |
| 448 | else |
| 449 | /* Always start in inactive schedule */ |
| 450 | list_add_tail(&qh->qh_list_entry, |
| 451 | &hsotg->periodic_sched_inactive); |
| 452 | |
| 453 | return status; |
| 454 | } |
| 455 | |
| 456 | /** |
| 457 | * dwc2_deschedule_periodic() - Removes an interrupt or isochronous transfer |
| 458 | * from the periodic schedule |
| 459 | * |
| 460 | * @hsotg: The HCD state structure for the DWC OTG controller |
| 461 | * @qh: QH for the periodic transfer |
| 462 | */ |
| 463 | static void dwc2_deschedule_periodic(struct dwc2_hsotg *hsotg, |
| 464 | struct dwc2_qh *qh) |
| 465 | { |
| 466 | bool did_modify; |
| 467 | |
| 468 | assert_spin_locked(&hsotg->lock); |
| 469 | |
| 470 | /* |
| 471 | * Schedule the unreserve to happen in a little bit. Cases here: |
| 472 | * - Unreserve worker might be sitting there waiting to grab the lock. |
| 473 | * In this case it will notice it's been schedule again and will |
| 474 | * quit. |
| 475 | * - Unreserve worker might not be scheduled. |
| 476 | * |
| 477 | * We should never already be scheduled since dwc2_schedule_periodic() |
| 478 | * should have canceled the scheduled unreserve timer (hence the |
| 479 | * warning on did_modify). |
| 480 | * |
| 481 | * We add + 1 to the timer to guarantee that at least 1 jiffy has |
| 482 | * passed (otherwise if the jiffy counter might tick right after we |
| 483 | * read it and we'll get no delay). |
| 484 | */ |
| 485 | did_modify = mod_timer(&qh->unreserve_timer, |
| 486 | jiffies + DWC2_UNRESERVE_DELAY + 1); |
| 487 | WARN_ON(did_modify); |
| 488 | qh->unreserve_pending = 1; |
| 489 | |
| 490 | list_del_init(&qh->qh_list_entry); |
| 491 | } |
| 492 | |
| 493 | /** |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 494 | * dwc2_qh_init() - Initializes a QH structure |
| 495 | * |
| 496 | * @hsotg: The HCD state structure for the DWC OTG controller |
| 497 | * @qh: The QH to init |
| 498 | * @urb: Holds the information about the device/endpoint needed to initialize |
| 499 | * the QH |
| 500 | */ |
| 501 | #define SCHEDULE_SLOP 10 |
| 502 | static void dwc2_qh_init(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, |
| 503 | struct dwc2_hcd_urb *urb) |
| 504 | { |
| 505 | int dev_speed, hub_addr, hub_port; |
| 506 | char *speed, *type; |
| 507 | |
| 508 | dev_vdbg(hsotg->dev, "%s()\n", __func__); |
| 509 | |
| 510 | /* Initialize QH */ |
Douglas Anderson | 17dd5b6 | 2016-01-28 18:19:59 -0800 | [diff] [blame] | 511 | qh->hsotg = hsotg; |
| 512 | setup_timer(&qh->unreserve_timer, dwc2_unreserve_timer_fn, |
| 513 | (unsigned long)qh); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 514 | qh->ep_type = dwc2_hcd_get_pipe_type(&urb->pipe_info); |
| 515 | qh->ep_is_in = dwc2_hcd_is_pipe_in(&urb->pipe_info) ? 1 : 0; |
| 516 | |
| 517 | qh->data_toggle = DWC2_HC_PID_DATA0; |
| 518 | qh->maxp = dwc2_hcd_get_mps(&urb->pipe_info); |
| 519 | INIT_LIST_HEAD(&qh->qtd_list); |
| 520 | INIT_LIST_HEAD(&qh->qh_list_entry); |
| 521 | |
| 522 | /* FS/LS Endpoint on HS Hub, NOT virtual root hub */ |
| 523 | dev_speed = dwc2_host_get_speed(hsotg, urb->priv); |
| 524 | |
| 525 | dwc2_host_hub_info(hsotg, urb->priv, &hub_addr, &hub_port); |
| 526 | |
| 527 | if ((dev_speed == USB_SPEED_LOW || dev_speed == USB_SPEED_FULL) && |
| 528 | hub_addr != 0 && hub_addr != 1) { |
| 529 | dev_vdbg(hsotg->dev, |
| 530 | "QH init: EP %d: TT found at hub addr %d, for port %d\n", |
| 531 | dwc2_hcd_get_ep_num(&urb->pipe_info), hub_addr, |
| 532 | hub_port); |
| 533 | qh->do_split = 1; |
| 534 | } |
| 535 | |
| 536 | if (qh->ep_type == USB_ENDPOINT_XFER_INT || |
| 537 | qh->ep_type == USB_ENDPOINT_XFER_ISOC) { |
| 538 | /* Compute scheduling parameters once and save them */ |
| 539 | u32 hprt, prtspd; |
| 540 | |
| 541 | /* Todo: Account for split transfers in the bus time */ |
| 542 | int bytecount = |
| 543 | dwc2_hb_mult(qh->maxp) * dwc2_max_packet(qh->maxp); |
| 544 | |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 545 | qh->host_us = NS_TO_US(usb_calc_bus_time(qh->do_split ? |
| 546 | USB_SPEED_HIGH : dev_speed, qh->ep_is_in, |
| 547 | qh->ep_type == USB_ENDPOINT_XFER_ISOC, |
| 548 | bytecount)); |
Gregory Herrero | dd81dd7 | 2015-09-22 15:16:52 +0200 | [diff] [blame] | 549 | |
| 550 | /* Ensure frame_number corresponds to the reality */ |
| 551 | hsotg->frame_number = dwc2_hcd_get_frame_number(hsotg); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 552 | /* Start in a slightly future (micro)frame */ |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 553 | qh->next_active_frame = dwc2_frame_num_inc(hsotg->frame_number, |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 554 | SCHEDULE_SLOP); |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 555 | qh->host_interval = urb->interval; |
| 556 | dwc2_sch_dbg(hsotg, "QH=%p init nxt=%04x, fn=%04x, int=%#x\n", |
| 557 | qh, qh->next_active_frame, hsotg->frame_number, |
| 558 | qh->host_interval); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 559 | #if 0 |
| 560 | /* Increase interrupt polling rate for debugging */ |
| 561 | if (qh->ep_type == USB_ENDPOINT_XFER_INT) |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 562 | qh->host_interval = 8; |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 563 | #endif |
Antti Seppälä | 95c8bc3 | 2015-08-20 21:41:07 +0300 | [diff] [blame] | 564 | hprt = dwc2_readl(hsotg->regs + HPRT0); |
Matthijs Kooijman | f923463 | 2013-08-30 18:45:13 +0200 | [diff] [blame] | 565 | prtspd = (hprt & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT; |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 566 | if (prtspd == HPRT0_SPD_HIGH_SPEED && |
| 567 | (dev_speed == USB_SPEED_LOW || |
| 568 | dev_speed == USB_SPEED_FULL)) { |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 569 | qh->host_interval *= 8; |
| 570 | qh->next_active_frame |= 0x7; |
| 571 | qh->start_split_frame = qh->next_active_frame; |
Douglas Anderson | 74fc4a7 | 2016-01-28 18:19:58 -0800 | [diff] [blame] | 572 | dwc2_sch_dbg(hsotg, |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 573 | "QH=%p init*8 nxt=%04x, fn=%04x, int=%#x\n", |
| 574 | qh, qh->next_active_frame, |
| 575 | hsotg->frame_number, qh->host_interval); |
Douglas Anderson | 74fc4a7 | 2016-01-28 18:19:58 -0800 | [diff] [blame] | 576 | |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 577 | } |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 578 | dev_dbg(hsotg->dev, "interval=%d\n", qh->host_interval); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 579 | } |
| 580 | |
| 581 | dev_vdbg(hsotg->dev, "DWC OTG HCD QH Initialized\n"); |
| 582 | dev_vdbg(hsotg->dev, "DWC OTG HCD QH - qh = %p\n", qh); |
| 583 | dev_vdbg(hsotg->dev, "DWC OTG HCD QH - Device Address = %d\n", |
| 584 | dwc2_hcd_get_dev_addr(&urb->pipe_info)); |
| 585 | dev_vdbg(hsotg->dev, "DWC OTG HCD QH - Endpoint %d, %s\n", |
| 586 | dwc2_hcd_get_ep_num(&urb->pipe_info), |
| 587 | dwc2_hcd_is_pipe_in(&urb->pipe_info) ? "IN" : "OUT"); |
| 588 | |
| 589 | qh->dev_speed = dev_speed; |
| 590 | |
| 591 | switch (dev_speed) { |
| 592 | case USB_SPEED_LOW: |
| 593 | speed = "low"; |
| 594 | break; |
| 595 | case USB_SPEED_FULL: |
| 596 | speed = "full"; |
| 597 | break; |
| 598 | case USB_SPEED_HIGH: |
| 599 | speed = "high"; |
| 600 | break; |
| 601 | default: |
| 602 | speed = "?"; |
| 603 | break; |
| 604 | } |
| 605 | dev_vdbg(hsotg->dev, "DWC OTG HCD QH - Speed = %s\n", speed); |
| 606 | |
| 607 | switch (qh->ep_type) { |
| 608 | case USB_ENDPOINT_XFER_ISOC: |
| 609 | type = "isochronous"; |
| 610 | break; |
| 611 | case USB_ENDPOINT_XFER_INT: |
| 612 | type = "interrupt"; |
| 613 | break; |
| 614 | case USB_ENDPOINT_XFER_CONTROL: |
| 615 | type = "control"; |
| 616 | break; |
| 617 | case USB_ENDPOINT_XFER_BULK: |
| 618 | type = "bulk"; |
| 619 | break; |
| 620 | default: |
| 621 | type = "?"; |
| 622 | break; |
| 623 | } |
| 624 | |
| 625 | dev_vdbg(hsotg->dev, "DWC OTG HCD QH - Type = %s\n", type); |
| 626 | |
| 627 | if (qh->ep_type == USB_ENDPOINT_XFER_INT) { |
| 628 | dev_vdbg(hsotg->dev, "DWC OTG HCD QH - usecs = %d\n", |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 629 | qh->host_us); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 630 | dev_vdbg(hsotg->dev, "DWC OTG HCD QH - interval = %d\n", |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 631 | qh->host_interval); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 632 | } |
| 633 | } |
| 634 | |
| 635 | /** |
| 636 | * dwc2_hcd_qh_create() - Allocates and initializes a QH |
| 637 | * |
| 638 | * @hsotg: The HCD state structure for the DWC OTG controller |
| 639 | * @urb: Holds the information about the device/endpoint needed |
| 640 | * to initialize the QH |
| 641 | * @atomic_alloc: Flag to do atomic allocation if needed |
| 642 | * |
| 643 | * Return: Pointer to the newly allocated QH, or NULL on error |
| 644 | */ |
Mian Yousaf Kaukab | b58e6ce | 2015-06-29 11:05:28 +0200 | [diff] [blame] | 645 | struct dwc2_qh *dwc2_hcd_qh_create(struct dwc2_hsotg *hsotg, |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 646 | struct dwc2_hcd_urb *urb, |
| 647 | gfp_t mem_flags) |
| 648 | { |
| 649 | struct dwc2_qh *qh; |
| 650 | |
Paul Zimmerman | b2d6cb5 | 2013-07-13 14:53:51 -0700 | [diff] [blame] | 651 | if (!urb->priv) |
| 652 | return NULL; |
| 653 | |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 654 | /* Allocate memory */ |
| 655 | qh = kzalloc(sizeof(*qh), mem_flags); |
| 656 | if (!qh) |
| 657 | return NULL; |
| 658 | |
| 659 | dwc2_qh_init(hsotg, qh, urb); |
| 660 | |
| 661 | if (hsotg->core_params->dma_desc_enable > 0 && |
| 662 | dwc2_hcd_qh_init_ddma(hsotg, qh, mem_flags) < 0) { |
| 663 | dwc2_hcd_qh_free(hsotg, qh); |
| 664 | return NULL; |
| 665 | } |
| 666 | |
| 667 | return qh; |
| 668 | } |
| 669 | |
| 670 | /** |
| 671 | * dwc2_hcd_qh_free() - Frees the QH |
| 672 | * |
| 673 | * @hsotg: HCD instance |
| 674 | * @qh: The QH to free |
| 675 | * |
| 676 | * QH should already be removed from the list. QTD list should already be empty |
| 677 | * if called from URB Dequeue. |
| 678 | * |
| 679 | * Must NOT be called with interrupt disabled or spinlock held |
| 680 | */ |
| 681 | void dwc2_hcd_qh_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) |
| 682 | { |
Douglas Anderson | 17dd5b6 | 2016-01-28 18:19:59 -0800 | [diff] [blame] | 683 | /* Make sure any unreserve work is finished. */ |
| 684 | if (del_timer_sync(&qh->unreserve_timer)) { |
| 685 | unsigned long flags; |
| 686 | |
| 687 | spin_lock_irqsave(&hsotg->lock, flags); |
| 688 | dwc2_do_unreserve(hsotg, qh); |
| 689 | spin_unlock_irqrestore(&hsotg->lock, flags); |
| 690 | } |
| 691 | |
Douglas Anderson | 3bc04e2 | 2016-01-28 18:19:53 -0800 | [diff] [blame] | 692 | if (qh->desc_list) |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 693 | dwc2_hcd_qh_free_ddma(hsotg, qh); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 694 | kfree(qh); |
| 695 | } |
| 696 | |
| 697 | /** |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 698 | * dwc2_hcd_qh_add() - Adds a QH to either the non periodic or periodic |
| 699 | * schedule if it is not already in the schedule. If the QH is already in |
| 700 | * the schedule, no action is taken. |
| 701 | * |
| 702 | * @hsotg: The HCD state structure for the DWC OTG controller |
| 703 | * @qh: The QH to add |
| 704 | * |
| 705 | * Return: 0 if successful, negative error code otherwise |
| 706 | */ |
| 707 | int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) |
| 708 | { |
Dan Carpenter | d31e6ca | 2013-11-25 17:11:29 +0300 | [diff] [blame] | 709 | int status; |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 710 | u32 intr_mask; |
| 711 | |
Matthijs Kooijman | b49977a | 2013-04-10 09:55:50 +0200 | [diff] [blame] | 712 | if (dbg_qh(qh)) |
| 713 | dev_vdbg(hsotg->dev, "%s()\n", __func__); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 714 | |
| 715 | if (!list_empty(&qh->qh_list_entry)) |
| 716 | /* QH already in a schedule */ |
Dan Carpenter | d31e6ca | 2013-11-25 17:11:29 +0300 | [diff] [blame] | 717 | return 0; |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 718 | |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 719 | if (!dwc2_frame_num_le(qh->next_active_frame, hsotg->frame_number) && |
Gregory Herrero | 08c4ffc | 2015-09-22 15:16:45 +0200 | [diff] [blame] | 720 | !hsotg->frame_number) { |
Douglas Anderson | 74fc4a7 | 2016-01-28 18:19:58 -0800 | [diff] [blame] | 721 | u16 new_frame; |
| 722 | |
Gregory Herrero | 08c4ffc | 2015-09-22 15:16:45 +0200 | [diff] [blame] | 723 | dev_dbg(hsotg->dev, |
| 724 | "reset frame number counter\n"); |
Douglas Anderson | 74fc4a7 | 2016-01-28 18:19:58 -0800 | [diff] [blame] | 725 | new_frame = dwc2_frame_num_inc(hsotg->frame_number, |
Gregory Herrero | 08c4ffc | 2015-09-22 15:16:45 +0200 | [diff] [blame] | 726 | SCHEDULE_SLOP); |
Douglas Anderson | 74fc4a7 | 2016-01-28 18:19:58 -0800 | [diff] [blame] | 727 | |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 728 | dwc2_sch_vdbg(hsotg, "QH=%p reset nxt=%04x=>%04x\n", |
| 729 | qh, qh->next_active_frame, new_frame); |
| 730 | qh->next_active_frame = new_frame; |
Gregory Herrero | 08c4ffc | 2015-09-22 15:16:45 +0200 | [diff] [blame] | 731 | } |
| 732 | |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 733 | /* Add the new QH to the appropriate schedule */ |
| 734 | if (dwc2_qh_is_non_per(qh)) { |
| 735 | /* Always start in inactive schedule */ |
| 736 | list_add_tail(&qh->qh_list_entry, |
| 737 | &hsotg->non_periodic_sched_inactive); |
Dan Carpenter | 5e12847 | 2013-11-25 17:14:14 +0300 | [diff] [blame] | 738 | return 0; |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 739 | } |
| 740 | |
Dan Carpenter | 5e12847 | 2013-11-25 17:14:14 +0300 | [diff] [blame] | 741 | status = dwc2_schedule_periodic(hsotg, qh); |
| 742 | if (status) |
| 743 | return status; |
| 744 | if (!hsotg->periodic_qh_count) { |
Antti Seppälä | 95c8bc3 | 2015-08-20 21:41:07 +0300 | [diff] [blame] | 745 | intr_mask = dwc2_readl(hsotg->regs + GINTMSK); |
Dan Carpenter | 5e12847 | 2013-11-25 17:14:14 +0300 | [diff] [blame] | 746 | intr_mask |= GINTSTS_SOF; |
Antti Seppälä | 95c8bc3 | 2015-08-20 21:41:07 +0300 | [diff] [blame] | 747 | dwc2_writel(intr_mask, hsotg->regs + GINTMSK); |
Dan Carpenter | 5e12847 | 2013-11-25 17:14:14 +0300 | [diff] [blame] | 748 | } |
| 749 | hsotg->periodic_qh_count++; |
| 750 | |
Dan Carpenter | d31e6ca | 2013-11-25 17:11:29 +0300 | [diff] [blame] | 751 | return 0; |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 752 | } |
| 753 | |
| 754 | /** |
| 755 | * dwc2_hcd_qh_unlink() - Removes a QH from either the non-periodic or periodic |
| 756 | * schedule. Memory is not freed. |
| 757 | * |
| 758 | * @hsotg: The HCD state structure |
| 759 | * @qh: QH to remove from schedule |
| 760 | */ |
| 761 | void dwc2_hcd_qh_unlink(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) |
| 762 | { |
| 763 | u32 intr_mask; |
| 764 | |
| 765 | dev_vdbg(hsotg->dev, "%s()\n", __func__); |
| 766 | |
| 767 | if (list_empty(&qh->qh_list_entry)) |
| 768 | /* QH is not in a schedule */ |
| 769 | return; |
| 770 | |
| 771 | if (dwc2_qh_is_non_per(qh)) { |
| 772 | if (hsotg->non_periodic_qh_ptr == &qh->qh_list_entry) |
| 773 | hsotg->non_periodic_qh_ptr = |
| 774 | hsotg->non_periodic_qh_ptr->next; |
| 775 | list_del_init(&qh->qh_list_entry); |
Dan Carpenter | 5e12847 | 2013-11-25 17:14:14 +0300 | [diff] [blame] | 776 | return; |
| 777 | } |
| 778 | |
| 779 | dwc2_deschedule_periodic(hsotg, qh); |
| 780 | hsotg->periodic_qh_count--; |
| 781 | if (!hsotg->periodic_qh_count) { |
Antti Seppälä | 95c8bc3 | 2015-08-20 21:41:07 +0300 | [diff] [blame] | 782 | intr_mask = dwc2_readl(hsotg->regs + GINTMSK); |
Dan Carpenter | 5e12847 | 2013-11-25 17:14:14 +0300 | [diff] [blame] | 783 | intr_mask &= ~GINTSTS_SOF; |
Antti Seppälä | 95c8bc3 | 2015-08-20 21:41:07 +0300 | [diff] [blame] | 784 | dwc2_writel(intr_mask, hsotg->regs + GINTMSK); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 785 | } |
| 786 | } |
| 787 | |
| 788 | /* |
| 789 | * Schedule the next continuing periodic split transfer |
| 790 | */ |
| 791 | static void dwc2_sched_periodic_split(struct dwc2_hsotg *hsotg, |
| 792 | struct dwc2_qh *qh, u16 frame_number, |
| 793 | int sched_next_periodic_split) |
| 794 | { |
| 795 | u16 incr; |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 796 | u16 old_frame = qh->next_active_frame; |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 797 | |
| 798 | if (sched_next_periodic_split) { |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 799 | qh->next_active_frame = frame_number; |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 800 | incr = dwc2_frame_num_inc(qh->start_split_frame, 1); |
| 801 | if (dwc2_frame_num_le(frame_number, incr)) { |
| 802 | /* |
| 803 | * Allow one frame to elapse after start split |
| 804 | * microframe before scheduling complete split, but |
| 805 | * DON'T if we are doing the next start split in the |
| 806 | * same frame for an ISOC out |
| 807 | */ |
| 808 | if (qh->ep_type != USB_ENDPOINT_XFER_ISOC || |
| 809 | qh->ep_is_in != 0) { |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 810 | qh->next_active_frame = dwc2_frame_num_inc( |
| 811 | qh->next_active_frame, 1); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 812 | } |
| 813 | } |
| 814 | } else { |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 815 | qh->next_active_frame = |
| 816 | dwc2_frame_num_inc(qh->start_split_frame, |
| 817 | qh->host_interval); |
| 818 | if (dwc2_frame_num_le(qh->next_active_frame, frame_number)) |
| 819 | qh->next_active_frame = frame_number; |
| 820 | qh->next_active_frame |= 0x7; |
| 821 | qh->start_split_frame = qh->next_active_frame; |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 822 | } |
Douglas Anderson | 74fc4a7 | 2016-01-28 18:19:58 -0800 | [diff] [blame] | 823 | |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 824 | dwc2_sch_vdbg(hsotg, "QH=%p next(%d) fn=%04x, nxt=%04x=>%04x (%+d)\n", |
Douglas Anderson | 74fc4a7 | 2016-01-28 18:19:58 -0800 | [diff] [blame] | 825 | qh, sched_next_periodic_split, frame_number, old_frame, |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 826 | qh->next_active_frame, |
| 827 | dwc2_frame_num_dec(qh->next_active_frame, old_frame)); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 828 | } |
| 829 | |
| 830 | /* |
| 831 | * Deactivates a QH. For non-periodic QHs, removes the QH from the active |
| 832 | * non-periodic schedule. The QH is added to the inactive non-periodic |
| 833 | * schedule if any QTDs are still attached to the QH. |
| 834 | * |
| 835 | * For periodic QHs, the QH is removed from the periodic queued schedule. If |
| 836 | * there are any QTDs still attached to the QH, the QH is added to either the |
| 837 | * periodic inactive schedule or the periodic ready schedule and its next |
| 838 | * scheduled frame is calculated. The QH is placed in the ready schedule if |
| 839 | * the scheduled frame has been reached already. Otherwise it's placed in the |
| 840 | * inactive schedule. If there are no QTDs attached to the QH, the QH is |
| 841 | * completely removed from the periodic schedule. |
| 842 | */ |
| 843 | void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, |
| 844 | int sched_next_periodic_split) |
| 845 | { |
Dan Carpenter | 5e12847 | 2013-11-25 17:14:14 +0300 | [diff] [blame] | 846 | u16 frame_number; |
| 847 | |
Matthijs Kooijman | b49977a | 2013-04-10 09:55:50 +0200 | [diff] [blame] | 848 | if (dbg_qh(qh)) |
| 849 | dev_vdbg(hsotg->dev, "%s()\n", __func__); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 850 | |
| 851 | if (dwc2_qh_is_non_per(qh)) { |
| 852 | dwc2_hcd_qh_unlink(hsotg, qh); |
| 853 | if (!list_empty(&qh->qtd_list)) |
| 854 | /* Add back to inactive non-periodic schedule */ |
| 855 | dwc2_hcd_qh_add(hsotg, qh); |
Dan Carpenter | 5e12847 | 2013-11-25 17:14:14 +0300 | [diff] [blame] | 856 | return; |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 857 | } |
Dan Carpenter | 5e12847 | 2013-11-25 17:14:14 +0300 | [diff] [blame] | 858 | |
| 859 | frame_number = dwc2_hcd_get_frame_number(hsotg); |
| 860 | |
| 861 | if (qh->do_split) { |
| 862 | dwc2_sched_periodic_split(hsotg, qh, frame_number, |
| 863 | sched_next_periodic_split); |
| 864 | } else { |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 865 | qh->next_active_frame = dwc2_frame_num_inc( |
| 866 | qh->next_active_frame, qh->host_interval); |
| 867 | if (dwc2_frame_num_le(qh->next_active_frame, frame_number)) |
| 868 | qh->next_active_frame = frame_number; |
Dan Carpenter | 5e12847 | 2013-11-25 17:14:14 +0300 | [diff] [blame] | 869 | } |
| 870 | |
| 871 | if (list_empty(&qh->qtd_list)) { |
| 872 | dwc2_hcd_qh_unlink(hsotg, qh); |
| 873 | return; |
| 874 | } |
| 875 | /* |
| 876 | * Remove from periodic_sched_queued and move to |
| 877 | * appropriate queue |
| 878 | */ |
| 879 | if ((hsotg->core_params->uframe_sched > 0 && |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 880 | dwc2_frame_num_le(qh->next_active_frame, frame_number)) || |
Dan Carpenter | 5e12847 | 2013-11-25 17:14:14 +0300 | [diff] [blame] | 881 | (hsotg->core_params->uframe_sched <= 0 && |
Douglas Anderson | ced9eee | 2016-01-28 18:20:04 -0800 | [diff] [blame] | 882 | qh->next_active_frame == frame_number)) |
Douglas Anderson | 94ef7ae | 2016-01-28 18:19:56 -0800 | [diff] [blame] | 883 | list_move_tail(&qh->qh_list_entry, |
| 884 | &hsotg->periodic_sched_ready); |
Dan Carpenter | 5e12847 | 2013-11-25 17:14:14 +0300 | [diff] [blame] | 885 | else |
Douglas Anderson | 94ef7ae | 2016-01-28 18:19:56 -0800 | [diff] [blame] | 886 | list_move_tail(&qh->qh_list_entry, |
| 887 | &hsotg->periodic_sched_inactive); |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 888 | } |
| 889 | |
| 890 | /** |
| 891 | * dwc2_hcd_qtd_init() - Initializes a QTD structure |
| 892 | * |
| 893 | * @qtd: The QTD to initialize |
| 894 | * @urb: The associated URB |
| 895 | */ |
| 896 | void dwc2_hcd_qtd_init(struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb) |
| 897 | { |
| 898 | qtd->urb = urb; |
| 899 | if (dwc2_hcd_get_pipe_type(&urb->pipe_info) == |
| 900 | USB_ENDPOINT_XFER_CONTROL) { |
| 901 | /* |
| 902 | * The only time the QTD data toggle is used is on the data |
| 903 | * phase of control transfers. This phase always starts with |
| 904 | * DATA1. |
| 905 | */ |
| 906 | qtd->data_toggle = DWC2_HC_PID_DATA1; |
| 907 | qtd->control_phase = DWC2_CONTROL_SETUP; |
| 908 | } |
| 909 | |
| 910 | /* Start split */ |
| 911 | qtd->complete_split = 0; |
| 912 | qtd->isoc_split_pos = DWC2_HCSPLT_XACTPOS_ALL; |
| 913 | qtd->isoc_split_offset = 0; |
| 914 | qtd->in_process = 0; |
| 915 | |
| 916 | /* Store the qtd ptr in the urb to reference the QTD */ |
| 917 | urb->qtd = qtd; |
| 918 | } |
| 919 | |
| 920 | /** |
| 921 | * dwc2_hcd_qtd_add() - Adds a QTD to the QTD-list of a QH |
Gregory Herrero | 33ad261 | 2015-04-29 22:09:15 +0200 | [diff] [blame] | 922 | * Caller must hold driver lock. |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 923 | * |
| 924 | * @hsotg: The DWC HCD structure |
| 925 | * @qtd: The QTD to add |
Mian Yousaf Kaukab | b58e6ce | 2015-06-29 11:05:28 +0200 | [diff] [blame] | 926 | * @qh: Queue head to add qtd to |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 927 | * |
| 928 | * Return: 0 if successful, negative error code otherwise |
| 929 | * |
Mian Yousaf Kaukab | b58e6ce | 2015-06-29 11:05:28 +0200 | [diff] [blame] | 930 | * If the QH to which the QTD is added is not currently scheduled, it is placed |
| 931 | * into the proper schedule based on its EP type. |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 932 | */ |
| 933 | int dwc2_hcd_qtd_add(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd, |
Mian Yousaf Kaukab | b58e6ce | 2015-06-29 11:05:28 +0200 | [diff] [blame] | 934 | struct dwc2_qh *qh) |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 935 | { |
Paul Zimmerman | b2d6cb5 | 2013-07-13 14:53:51 -0700 | [diff] [blame] | 936 | int retval; |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 937 | |
Mian Yousaf Kaukab | b58e6ce | 2015-06-29 11:05:28 +0200 | [diff] [blame] | 938 | if (unlikely(!qh)) { |
| 939 | dev_err(hsotg->dev, "%s: Invalid QH\n", __func__); |
| 940 | retval = -EINVAL; |
| 941 | goto fail; |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 942 | } |
| 943 | |
Mian Yousaf Kaukab | b58e6ce | 2015-06-29 11:05:28 +0200 | [diff] [blame] | 944 | retval = dwc2_hcd_qh_add(hsotg, qh); |
Paul Zimmerman | b2d6cb5 | 2013-07-13 14:53:51 -0700 | [diff] [blame] | 945 | if (retval) |
| 946 | goto fail; |
| 947 | |
Mian Yousaf Kaukab | b58e6ce | 2015-06-29 11:05:28 +0200 | [diff] [blame] | 948 | qtd->qh = qh; |
| 949 | list_add_tail(&qtd->qtd_list_entry, &qh->qtd_list); |
Paul Zimmerman | b2d6cb5 | 2013-07-13 14:53:51 -0700 | [diff] [blame] | 950 | |
| 951 | return 0; |
Paul Zimmerman | b2d6cb5 | 2013-07-13 14:53:51 -0700 | [diff] [blame] | 952 | fail: |
Paul Zimmerman | 7359d48 | 2013-03-11 17:47:59 -0700 | [diff] [blame] | 953 | return retval; |
| 954 | } |