| 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Copyright (C) 2011 Marvell International Ltd. All rights reserved. |
| 4 | * Author: Chao Xie <chao.xie@marvell.com> |
| 5 | * Neil Zhang <zhangwm@marvell.com> |
| 6 | */ |
| 7 | |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/pci.h> |
| 10 | #include <linux/dma-mapping.h> |
| 11 | #include <linux/dmapool.h> |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/delay.h> |
| 14 | #include <linux/ioport.h> |
| 15 | #include <linux/sched.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/errno.h> |
| 18 | #include <linux/err.h> |
| 19 | #include <linux/timer.h> |
| 20 | #include <linux/list.h> |
| 21 | #include <linux/interrupt.h> |
| 22 | #include <linux/moduleparam.h> |
| 23 | #include <linux/device.h> |
| 24 | #include <linux/usb/ch9.h> |
| 25 | #include <linux/usb/gadget.h> |
| 26 | #include <linux/usb/otg.h> |
| 27 | #include <linux/pm.h> |
| 28 | #include <linux/io.h> |
| 29 | #include <linux/irq.h> |
| 30 | #include <linux/platform_device.h> |
| 31 | #include <linux/clk.h> |
| 32 | #include <linux/platform_data/mv_usb.h> |
| 33 | #include <asm/unaligned.h> |
| 34 | |
| 35 | #include "mv_udc.h" |
| 36 | |
| 37 | #define DRIVER_DESC "Marvell PXA USB Device Controller driver" |
| 38 | |
| 39 | #define ep_dir(ep) (((ep)->ep_num == 0) ? \ |
| 40 | ((ep)->udc->ep0_dir) : ((ep)->direction)) |
| 41 | |
| 42 | /* timeout value -- usec */ |
| 43 | #define RESET_TIMEOUT 10000 |
| 44 | #define FLUSH_TIMEOUT 10000 |
| 45 | #define EPSTATUS_TIMEOUT 10000 |
| 46 | #define PRIME_TIMEOUT 10000 |
| 47 | #define READSAFE_TIMEOUT 1000 |
| 48 | |
| 49 | #define LOOPS_USEC_SHIFT 1 |
| 50 | #define LOOPS_USEC (1 << LOOPS_USEC_SHIFT) |
| 51 | #define LOOPS(timeout) ((timeout) >> LOOPS_USEC_SHIFT) |
| 52 | |
| 53 | static DECLARE_COMPLETION(release_done); |
| 54 | |
| 55 | static const char driver_name[] = "mv_udc"; |
| 56 | |
| 57 | static void nuke(struct mv_ep *ep, int status); |
| 58 | static void stop_activity(struct mv_udc *udc, struct usb_gadget_driver *driver); |
| 59 | |
| 60 | /* for endpoint 0 operations */ |
| 61 | static const struct usb_endpoint_descriptor mv_ep0_desc = { |
| 62 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 63 | .bDescriptorType = USB_DT_ENDPOINT, |
| 64 | .bEndpointAddress = 0, |
| 65 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, |
| 66 | .wMaxPacketSize = EP0_MAX_PKT_SIZE, |
| 67 | }; |
| 68 | |
| 69 | static void ep0_reset(struct mv_udc *udc) |
| 70 | { |
| 71 | struct mv_ep *ep; |
| 72 | u32 epctrlx; |
| 73 | int i = 0; |
| 74 | |
| 75 | /* ep0 in and out */ |
| 76 | for (i = 0; i < 2; i++) { |
| 77 | ep = &udc->eps[i]; |
| 78 | ep->udc = udc; |
| 79 | |
| 80 | /* ep0 dQH */ |
| 81 | ep->dqh = &udc->ep_dqh[i]; |
| 82 | |
| 83 | /* configure ep0 endpoint capabilities in dQH */ |
| 84 | ep->dqh->max_packet_length = |
| 85 | (EP0_MAX_PKT_SIZE << EP_QUEUE_HEAD_MAX_PKT_LEN_POS) |
| 86 | | EP_QUEUE_HEAD_IOS; |
| 87 | |
| 88 | ep->dqh->next_dtd_ptr = EP_QUEUE_HEAD_NEXT_TERMINATE; |
| 89 | |
| 90 | epctrlx = readl(&udc->op_regs->epctrlx[0]); |
| 91 | if (i) { /* TX */ |
| 92 | epctrlx |= EPCTRL_TX_ENABLE |
| 93 | | (USB_ENDPOINT_XFER_CONTROL |
| 94 | << EPCTRL_TX_EP_TYPE_SHIFT); |
| 95 | |
| 96 | } else { /* RX */ |
| 97 | epctrlx |= EPCTRL_RX_ENABLE |
| 98 | | (USB_ENDPOINT_XFER_CONTROL |
| 99 | << EPCTRL_RX_EP_TYPE_SHIFT); |
| 100 | } |
| 101 | |
| 102 | writel(epctrlx, &udc->op_regs->epctrlx[0]); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /* protocol ep0 stall, will automatically be cleared on new transaction */ |
| 107 | static void ep0_stall(struct mv_udc *udc) |
| 108 | { |
| 109 | u32 epctrlx; |
| 110 | |
| 111 | /* set TX and RX to stall */ |
| 112 | epctrlx = readl(&udc->op_regs->epctrlx[0]); |
| 113 | epctrlx |= EPCTRL_RX_EP_STALL | EPCTRL_TX_EP_STALL; |
| 114 | writel(epctrlx, &udc->op_regs->epctrlx[0]); |
| 115 | |
| 116 | /* update ep0 state */ |
| 117 | udc->ep0_state = WAIT_FOR_SETUP; |
| 118 | udc->ep0_dir = EP_DIR_OUT; |
| 119 | } |
| 120 | |
| 121 | static int process_ep_req(struct mv_udc *udc, int index, |
| 122 | struct mv_req *curr_req) |
| 123 | { |
| 124 | struct mv_dtd *curr_dtd; |
| 125 | struct mv_dqh *curr_dqh; |
| 126 | int actual, remaining_length; |
| 127 | int i, direction; |
| 128 | int retval = 0; |
| 129 | u32 errors; |
| 130 | u32 bit_pos; |
| 131 | |
| 132 | curr_dqh = &udc->ep_dqh[index]; |
| 133 | direction = index % 2; |
| 134 | |
| 135 | curr_dtd = curr_req->head; |
| 136 | actual = curr_req->req.length; |
| 137 | |
| 138 | for (i = 0; i < curr_req->dtd_count; i++) { |
| 139 | if (curr_dtd->size_ioc_sts & DTD_STATUS_ACTIVE) { |
| 140 | dev_dbg(&udc->dev->dev, "%s, dTD not completed\n", |
| 141 | udc->eps[index].name); |
| 142 | return 1; |
| 143 | } |
| 144 | |
| 145 | errors = curr_dtd->size_ioc_sts & DTD_ERROR_MASK; |
| 146 | if (!errors) { |
| 147 | remaining_length = |
| 148 | (curr_dtd->size_ioc_sts & DTD_PACKET_SIZE) |
| 149 | >> DTD_LENGTH_BIT_POS; |
| 150 | actual -= remaining_length; |
| 151 | |
| 152 | if (remaining_length) { |
| 153 | if (direction) { |
| 154 | dev_dbg(&udc->dev->dev, |
| 155 | "TX dTD remains data\n"); |
| 156 | retval = -EPROTO; |
| 157 | break; |
| 158 | } else |
| 159 | break; |
| 160 | } |
| 161 | } else { |
| 162 | dev_info(&udc->dev->dev, |
| 163 | "complete_tr error: ep=%d %s: error = 0x%x\n", |
| 164 | index >> 1, direction ? "SEND" : "RECV", |
| 165 | errors); |
| 166 | if (errors & DTD_STATUS_HALTED) { |
| 167 | /* Clear the errors and Halt condition */ |
| 168 | curr_dqh->size_ioc_int_sts &= ~errors; |
| 169 | retval = -EPIPE; |
| 170 | } else if (errors & DTD_STATUS_DATA_BUFF_ERR) { |
| 171 | retval = -EPROTO; |
| 172 | } else if (errors & DTD_STATUS_TRANSACTION_ERR) { |
| 173 | retval = -EILSEQ; |
| 174 | } |
| 175 | } |
| 176 | if (i != curr_req->dtd_count - 1) |
| 177 | curr_dtd = (struct mv_dtd *)curr_dtd->next_dtd_virt; |
| 178 | } |
| 179 | if (retval) |
| 180 | return retval; |
| 181 | |
| 182 | if (direction == EP_DIR_OUT) |
| 183 | bit_pos = 1 << curr_req->ep->ep_num; |
| 184 | else |
| 185 | bit_pos = 1 << (16 + curr_req->ep->ep_num); |
| 186 | |
| 187 | while (curr_dqh->curr_dtd_ptr == curr_dtd->td_dma) { |
| 188 | if (curr_dtd->dtd_next == EP_QUEUE_HEAD_NEXT_TERMINATE) { |
| 189 | while (readl(&udc->op_regs->epstatus) & bit_pos) |
| 190 | udelay(1); |
| 191 | break; |
| 192 | } |
| 193 | udelay(1); |
| 194 | } |
| 195 | |
| 196 | curr_req->req.actual = actual; |
| 197 | |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | /* |
| 202 | * done() - retire a request; caller blocked irqs |
| 203 | * @status : request status to be set, only works when |
| 204 | * request is still in progress. |
| 205 | */ |
| 206 | static void done(struct mv_ep *ep, struct mv_req *req, int status) |
| 207 | __releases(&ep->udc->lock) |
| 208 | __acquires(&ep->udc->lock) |
| 209 | { |
| 210 | struct mv_udc *udc = NULL; |
| 211 | unsigned char stopped = ep->stopped; |
| 212 | struct mv_dtd *curr_td, *next_td; |
| 213 | int j; |
| 214 | |
| 215 | udc = (struct mv_udc *)ep->udc; |
| 216 | /* Removed the req from fsl_ep->queue */ |
| 217 | list_del_init(&req->queue); |
| 218 | |
| 219 | /* req.status should be set as -EINPROGRESS in ep_queue() */ |
| 220 | if (req->req.status == -EINPROGRESS) |
| 221 | req->req.status = status; |
| 222 | else |
| 223 | status = req->req.status; |
| 224 | |
| 225 | /* Free dtd for the request */ |
| 226 | next_td = req->head; |
| 227 | for (j = 0; j < req->dtd_count; j++) { |
| 228 | curr_td = next_td; |
| 229 | if (j != req->dtd_count - 1) |
| 230 | next_td = curr_td->next_dtd_virt; |
| 231 | dma_pool_free(udc->dtd_pool, curr_td, curr_td->td_dma); |
| 232 | } |
| 233 | |
| 234 | usb_gadget_unmap_request(&udc->gadget, &req->req, ep_dir(ep)); |
| 235 | |
| 236 | if (status && (status != -ESHUTDOWN)) |
| 237 | dev_info(&udc->dev->dev, "complete %s req %p stat %d len %u/%u", |
| 238 | ep->ep.name, &req->req, status, |
| 239 | req->req.actual, req->req.length); |
| 240 | |
| 241 | ep->stopped = 1; |
| 242 | |
| 243 | spin_unlock(&ep->udc->lock); |
| 244 | |
| 245 | usb_gadget_giveback_request(&ep->ep, &req->req); |
| 246 | |
| 247 | spin_lock(&ep->udc->lock); |
| 248 | ep->stopped = stopped; |
| 249 | } |
| 250 | |
| 251 | static int queue_dtd(struct mv_ep *ep, struct mv_req *req) |
| 252 | { |
| 253 | struct mv_udc *udc; |
| 254 | struct mv_dqh *dqh; |
| 255 | u32 bit_pos, direction; |
| 256 | u32 usbcmd, epstatus; |
| 257 | unsigned int loops; |
| 258 | int retval = 0; |
| 259 | |
| 260 | udc = ep->udc; |
| 261 | direction = ep_dir(ep); |
| 262 | dqh = &(udc->ep_dqh[ep->ep_num * 2 + direction]); |
| 263 | bit_pos = 1 << (((direction == EP_DIR_OUT) ? 0 : 16) + ep->ep_num); |
| 264 | |
| 265 | /* check if the pipe is empty */ |
| 266 | if (!(list_empty(&ep->queue))) { |
| 267 | struct mv_req *lastreq; |
| 268 | lastreq = list_entry(ep->queue.prev, struct mv_req, queue); |
| 269 | lastreq->tail->dtd_next = |
| 270 | req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK; |
| 271 | |
| 272 | wmb(); |
| 273 | |
| 274 | if (readl(&udc->op_regs->epprime) & bit_pos) |
| 275 | goto done; |
| 276 | |
| 277 | loops = LOOPS(READSAFE_TIMEOUT); |
| 278 | while (1) { |
| 279 | /* start with setting the semaphores */ |
| 280 | usbcmd = readl(&udc->op_regs->usbcmd); |
| 281 | usbcmd |= USBCMD_ATDTW_TRIPWIRE_SET; |
| 282 | writel(usbcmd, &udc->op_regs->usbcmd); |
| 283 | |
| 284 | /* read the endpoint status */ |
| 285 | epstatus = readl(&udc->op_regs->epstatus) & bit_pos; |
| 286 | |
| 287 | /* |
| 288 | * Reread the ATDTW semaphore bit to check if it is |
| 289 | * cleared. When hardware see a hazard, it will clear |
| 290 | * the bit or else we remain set to 1 and we can |
| 291 | * proceed with priming of endpoint if not already |
| 292 | * primed. |
| 293 | */ |
| 294 | if (readl(&udc->op_regs->usbcmd) |
| 295 | & USBCMD_ATDTW_TRIPWIRE_SET) |
| 296 | break; |
| 297 | |
| 298 | loops--; |
| 299 | if (loops == 0) { |
| 300 | dev_err(&udc->dev->dev, |
| 301 | "Timeout for ATDTW_TRIPWIRE...\n"); |
| 302 | retval = -ETIME; |
| 303 | goto done; |
| 304 | } |
| 305 | udelay(LOOPS_USEC); |
| 306 | } |
| 307 | |
| 308 | /* Clear the semaphore */ |
| 309 | usbcmd = readl(&udc->op_regs->usbcmd); |
| 310 | usbcmd &= USBCMD_ATDTW_TRIPWIRE_CLEAR; |
| 311 | writel(usbcmd, &udc->op_regs->usbcmd); |
| 312 | |
| 313 | if (epstatus) |
| 314 | goto done; |
| 315 | } |
| 316 | |
| 317 | /* Write dQH next pointer and terminate bit to 0 */ |
| 318 | dqh->next_dtd_ptr = req->head->td_dma |
| 319 | & EP_QUEUE_HEAD_NEXT_POINTER_MASK; |
| 320 | |
| 321 | /* clear active and halt bit, in case set from a previous error */ |
| 322 | dqh->size_ioc_int_sts &= ~(DTD_STATUS_ACTIVE | DTD_STATUS_HALTED); |
| 323 | |
| 324 | /* Ensure that updates to the QH will occur before priming. */ |
| 325 | wmb(); |
| 326 | |
| 327 | /* Prime the Endpoint */ |
| 328 | writel(bit_pos, &udc->op_regs->epprime); |
| 329 | |
| 330 | done: |
| 331 | return retval; |
| 332 | } |
| 333 | |
| 334 | static struct mv_dtd *build_dtd(struct mv_req *req, unsigned *length, |
| 335 | dma_addr_t *dma, int *is_last) |
| 336 | { |
| 337 | struct mv_dtd *dtd; |
| 338 | struct mv_udc *udc; |
| 339 | struct mv_dqh *dqh; |
| 340 | u32 temp, mult = 0; |
| 341 | |
| 342 | /* how big will this transfer be? */ |
| 343 | if (usb_endpoint_xfer_isoc(req->ep->ep.desc)) { |
| 344 | dqh = req->ep->dqh; |
| 345 | mult = (dqh->max_packet_length >> EP_QUEUE_HEAD_MULT_POS) |
| 346 | & 0x3; |
| 347 | *length = min(req->req.length - req->req.actual, |
| 348 | (unsigned)(mult * req->ep->ep.maxpacket)); |
| 349 | } else |
| 350 | *length = min(req->req.length - req->req.actual, |
| 351 | (unsigned)EP_MAX_LENGTH_TRANSFER); |
| 352 | |
| 353 | udc = req->ep->udc; |
| 354 | |
| 355 | /* |
| 356 | * Be careful that no _GFP_HIGHMEM is set, |
| 357 | * or we can not use dma_to_virt |
| 358 | */ |
| 359 | dtd = dma_pool_alloc(udc->dtd_pool, GFP_ATOMIC, dma); |
| 360 | if (dtd == NULL) |
| 361 | return dtd; |
| 362 | |
| 363 | dtd->td_dma = *dma; |
| 364 | /* initialize buffer page pointers */ |
| 365 | temp = (u32)(req->req.dma + req->req.actual); |
| 366 | dtd->buff_ptr0 = cpu_to_le32(temp); |
| 367 | temp &= ~0xFFF; |
| 368 | dtd->buff_ptr1 = cpu_to_le32(temp + 0x1000); |
| 369 | dtd->buff_ptr2 = cpu_to_le32(temp + 0x2000); |
| 370 | dtd->buff_ptr3 = cpu_to_le32(temp + 0x3000); |
| 371 | dtd->buff_ptr4 = cpu_to_le32(temp + 0x4000); |
| 372 | |
| 373 | req->req.actual += *length; |
| 374 | |
| 375 | /* zlp is needed if req->req.zero is set */ |
| 376 | if (req->req.zero) { |
| 377 | if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0) |
| 378 | *is_last = 1; |
| 379 | else |
| 380 | *is_last = 0; |
| 381 | } else if (req->req.length == req->req.actual) |
| 382 | *is_last = 1; |
| 383 | else |
| 384 | *is_last = 0; |
| 385 | |
| 386 | /* Fill in the transfer size; set active bit */ |
| 387 | temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE); |
| 388 | |
| 389 | /* Enable interrupt for the last dtd of a request */ |
| 390 | if (*is_last && !req->req.no_interrupt) |
| 391 | temp |= DTD_IOC; |
| 392 | |
| 393 | temp |= mult << 10; |
| 394 | |
| 395 | dtd->size_ioc_sts = temp; |
| 396 | |
| 397 | mb(); |
| 398 | |
| 399 | return dtd; |
| 400 | } |
| 401 | |
| 402 | /* generate dTD linked list for a request */ |
| 403 | static int req_to_dtd(struct mv_req *req) |
| 404 | { |
| 405 | unsigned count; |
| 406 | int is_last, is_first = 1; |
| 407 | struct mv_dtd *dtd, *last_dtd = NULL; |
| 408 | dma_addr_t dma; |
| 409 | |
| 410 | do { |
| 411 | dtd = build_dtd(req, &count, &dma, &is_last); |
| 412 | if (dtd == NULL) |
| 413 | return -ENOMEM; |
| 414 | |
| 415 | if (is_first) { |
| 416 | is_first = 0; |
| 417 | req->head = dtd; |
| 418 | } else { |
| 419 | last_dtd->dtd_next = dma; |
| 420 | last_dtd->next_dtd_virt = dtd; |
| 421 | } |
| 422 | last_dtd = dtd; |
| 423 | req->dtd_count++; |
| 424 | } while (!is_last); |
| 425 | |
| 426 | /* set terminate bit to 1 for the last dTD */ |
| 427 | dtd->dtd_next = DTD_NEXT_TERMINATE; |
| 428 | |
| 429 | req->tail = dtd; |
| 430 | |
| 431 | return 0; |
| 432 | } |
| 433 | |
| 434 | static int mv_ep_enable(struct usb_ep *_ep, |
| 435 | const struct usb_endpoint_descriptor *desc) |
| 436 | { |
| 437 | struct mv_udc *udc; |
| 438 | struct mv_ep *ep; |
| 439 | struct mv_dqh *dqh; |
| 440 | u16 max = 0; |
| 441 | u32 bit_pos, epctrlx, direction; |
| 442 | const unsigned char zlt = 1; |
| 443 | unsigned char ios, mult; |
| 444 | unsigned long flags; |
| 445 | |
| 446 | ep = container_of(_ep, struct mv_ep, ep); |
| 447 | udc = ep->udc; |
| 448 | |
| 449 | if (!_ep || !desc |
| 450 | || desc->bDescriptorType != USB_DT_ENDPOINT) |
| 451 | return -EINVAL; |
| 452 | |
| 453 | if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) |
| 454 | return -ESHUTDOWN; |
| 455 | |
| 456 | direction = ep_dir(ep); |
| 457 | max = usb_endpoint_maxp(desc); |
| 458 | |
| 459 | /* |
| 460 | * disable HW zero length termination select |
| 461 | * driver handles zero length packet through req->req.zero |
| 462 | */ |
| 463 | bit_pos = 1 << ((direction == EP_DIR_OUT ? 0 : 16) + ep->ep_num); |
| 464 | |
| 465 | /* Check if the Endpoint is Primed */ |
| 466 | if ((readl(&udc->op_regs->epprime) & bit_pos) |
| 467 | || (readl(&udc->op_regs->epstatus) & bit_pos)) { |
| 468 | dev_info(&udc->dev->dev, |
| 469 | "ep=%d %s: Init ERROR: ENDPTPRIME=0x%x," |
| 470 | " ENDPTSTATUS=0x%x, bit_pos=0x%x\n", |
| 471 | (unsigned)ep->ep_num, direction ? "SEND" : "RECV", |
| 472 | (unsigned)readl(&udc->op_regs->epprime), |
| 473 | (unsigned)readl(&udc->op_regs->epstatus), |
| 474 | (unsigned)bit_pos); |
| 475 | goto en_done; |
| 476 | } |
| 477 | |
| 478 | /* Set the max packet length, interrupt on Setup and Mult fields */ |
| 479 | ios = 0; |
| 480 | mult = 0; |
| 481 | switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { |
| 482 | case USB_ENDPOINT_XFER_BULK: |
| 483 | case USB_ENDPOINT_XFER_INT: |
| 484 | break; |
| 485 | case USB_ENDPOINT_XFER_CONTROL: |
| 486 | ios = 1; |
| 487 | break; |
| 488 | case USB_ENDPOINT_XFER_ISOC: |
| 489 | /* Calculate transactions needed for high bandwidth iso */ |
| 490 | mult = usb_endpoint_maxp_mult(desc); |
| 491 | /* 3 transactions at most */ |
| 492 | if (mult > 3) |
| 493 | goto en_done; |
| 494 | break; |
| 495 | default: |
| 496 | goto en_done; |
| 497 | } |
| 498 | |
| 499 | spin_lock_irqsave(&udc->lock, flags); |
| 500 | /* Get the endpoint queue head address */ |
| 501 | dqh = ep->dqh; |
| 502 | dqh->max_packet_length = (max << EP_QUEUE_HEAD_MAX_PKT_LEN_POS) |
| 503 | | (mult << EP_QUEUE_HEAD_MULT_POS) |
| 504 | | (zlt ? EP_QUEUE_HEAD_ZLT_SEL : 0) |
| 505 | | (ios ? EP_QUEUE_HEAD_IOS : 0); |
| 506 | dqh->next_dtd_ptr = 1; |
| 507 | dqh->size_ioc_int_sts = 0; |
| 508 | |
| 509 | ep->ep.maxpacket = max; |
| 510 | ep->ep.desc = desc; |
| 511 | ep->stopped = 0; |
| 512 | |
| 513 | /* Enable the endpoint for Rx or Tx and set the endpoint type */ |
| 514 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); |
| 515 | if (direction == EP_DIR_IN) { |
| 516 | epctrlx &= ~EPCTRL_TX_ALL_MASK; |
| 517 | epctrlx |= EPCTRL_TX_ENABLE | EPCTRL_TX_DATA_TOGGLE_RST |
| 518 | | ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) |
| 519 | << EPCTRL_TX_EP_TYPE_SHIFT); |
| 520 | } else { |
| 521 | epctrlx &= ~EPCTRL_RX_ALL_MASK; |
| 522 | epctrlx |= EPCTRL_RX_ENABLE | EPCTRL_RX_DATA_TOGGLE_RST |
| 523 | | ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) |
| 524 | << EPCTRL_RX_EP_TYPE_SHIFT); |
| 525 | } |
| 526 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); |
| 527 | |
| 528 | /* |
| 529 | * Implement Guideline (GL# USB-7) The unused endpoint type must |
| 530 | * be programmed to bulk. |
| 531 | */ |
| 532 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); |
| 533 | if ((epctrlx & EPCTRL_RX_ENABLE) == 0) { |
| 534 | epctrlx |= (USB_ENDPOINT_XFER_BULK |
| 535 | << EPCTRL_RX_EP_TYPE_SHIFT); |
| 536 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); |
| 537 | } |
| 538 | |
| 539 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); |
| 540 | if ((epctrlx & EPCTRL_TX_ENABLE) == 0) { |
| 541 | epctrlx |= (USB_ENDPOINT_XFER_BULK |
| 542 | << EPCTRL_TX_EP_TYPE_SHIFT); |
| 543 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); |
| 544 | } |
| 545 | |
| 546 | spin_unlock_irqrestore(&udc->lock, flags); |
| 547 | |
| 548 | return 0; |
| 549 | en_done: |
| 550 | return -EINVAL; |
| 551 | } |
| 552 | |
| 553 | static int mv_ep_disable(struct usb_ep *_ep) |
| 554 | { |
| 555 | struct mv_udc *udc; |
| 556 | struct mv_ep *ep; |
| 557 | struct mv_dqh *dqh; |
| 558 | u32 epctrlx, direction; |
| 559 | unsigned long flags; |
| 560 | |
| 561 | ep = container_of(_ep, struct mv_ep, ep); |
| 562 | if ((_ep == NULL) || !ep->ep.desc) |
| 563 | return -EINVAL; |
| 564 | |
| 565 | udc = ep->udc; |
| 566 | |
| 567 | /* Get the endpoint queue head address */ |
| 568 | dqh = ep->dqh; |
| 569 | |
| 570 | spin_lock_irqsave(&udc->lock, flags); |
| 571 | |
| 572 | direction = ep_dir(ep); |
| 573 | |
| 574 | /* Reset the max packet length and the interrupt on Setup */ |
| 575 | dqh->max_packet_length = 0; |
| 576 | |
| 577 | /* Disable the endpoint for Rx or Tx and reset the endpoint type */ |
| 578 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); |
| 579 | epctrlx &= ~((direction == EP_DIR_IN) |
| 580 | ? (EPCTRL_TX_ENABLE | EPCTRL_TX_TYPE) |
| 581 | : (EPCTRL_RX_ENABLE | EPCTRL_RX_TYPE)); |
| 582 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); |
| 583 | |
| 584 | /* nuke all pending requests (does flush) */ |
| 585 | nuke(ep, -ESHUTDOWN); |
| 586 | |
| 587 | ep->ep.desc = NULL; |
| 588 | ep->stopped = 1; |
| 589 | |
| 590 | spin_unlock_irqrestore(&udc->lock, flags); |
| 591 | |
| 592 | return 0; |
| 593 | } |
| 594 | |
| 595 | static struct usb_request * |
| 596 | mv_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
| 597 | { |
| 598 | struct mv_req *req; |
| 599 | |
| 600 | req = kzalloc(sizeof *req, gfp_flags); |
| 601 | if (!req) |
| 602 | return NULL; |
| 603 | |
| 604 | req->req.dma = DMA_ADDR_INVALID; |
| 605 | INIT_LIST_HEAD(&req->queue); |
| 606 | |
| 607 | return &req->req; |
| 608 | } |
| 609 | |
| 610 | static void mv_free_request(struct usb_ep *_ep, struct usb_request *_req) |
| 611 | { |
| 612 | struct mv_req *req = NULL; |
| 613 | |
| 614 | req = container_of(_req, struct mv_req, req); |
| 615 | |
| 616 | if (_req) |
| 617 | kfree(req); |
| 618 | } |
| 619 | |
| 620 | static void mv_ep_fifo_flush(struct usb_ep *_ep) |
| 621 | { |
| 622 | struct mv_udc *udc; |
| 623 | u32 bit_pos, direction; |
| 624 | struct mv_ep *ep; |
| 625 | unsigned int loops; |
| 626 | |
| 627 | if (!_ep) |
| 628 | return; |
| 629 | |
| 630 | ep = container_of(_ep, struct mv_ep, ep); |
| 631 | if (!ep->ep.desc) |
| 632 | return; |
| 633 | |
| 634 | udc = ep->udc; |
| 635 | direction = ep_dir(ep); |
| 636 | |
| 637 | if (ep->ep_num == 0) |
| 638 | bit_pos = (1 << 16) | 1; |
| 639 | else if (direction == EP_DIR_OUT) |
| 640 | bit_pos = 1 << ep->ep_num; |
| 641 | else |
| 642 | bit_pos = 1 << (16 + ep->ep_num); |
| 643 | |
| 644 | loops = LOOPS(EPSTATUS_TIMEOUT); |
| 645 | do { |
| 646 | unsigned int inter_loops; |
| 647 | |
| 648 | if (loops == 0) { |
| 649 | dev_err(&udc->dev->dev, |
| 650 | "TIMEOUT for ENDPTSTATUS=0x%x, bit_pos=0x%x\n", |
| 651 | (unsigned)readl(&udc->op_regs->epstatus), |
| 652 | (unsigned)bit_pos); |
| 653 | return; |
| 654 | } |
| 655 | /* Write 1 to the Flush register */ |
| 656 | writel(bit_pos, &udc->op_regs->epflush); |
| 657 | |
| 658 | /* Wait until flushing completed */ |
| 659 | inter_loops = LOOPS(FLUSH_TIMEOUT); |
| 660 | while (readl(&udc->op_regs->epflush)) { |
| 661 | /* |
| 662 | * ENDPTFLUSH bit should be cleared to indicate this |
| 663 | * operation is complete |
| 664 | */ |
| 665 | if (inter_loops == 0) { |
| 666 | dev_err(&udc->dev->dev, |
| 667 | "TIMEOUT for ENDPTFLUSH=0x%x," |
| 668 | "bit_pos=0x%x\n", |
| 669 | (unsigned)readl(&udc->op_regs->epflush), |
| 670 | (unsigned)bit_pos); |
| 671 | return; |
| 672 | } |
| 673 | inter_loops--; |
| 674 | udelay(LOOPS_USEC); |
| 675 | } |
| 676 | loops--; |
| 677 | } while (readl(&udc->op_regs->epstatus) & bit_pos); |
| 678 | } |
| 679 | |
| 680 | /* queues (submits) an I/O request to an endpoint */ |
| 681 | static int |
| 682 | mv_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
| 683 | { |
| 684 | struct mv_ep *ep = container_of(_ep, struct mv_ep, ep); |
| 685 | struct mv_req *req = container_of(_req, struct mv_req, req); |
| 686 | struct mv_udc *udc = ep->udc; |
| 687 | unsigned long flags; |
| 688 | int retval; |
| 689 | |
| 690 | /* catch various bogus parameters */ |
| 691 | if (!_req || !req->req.complete || !req->req.buf |
| 692 | || !list_empty(&req->queue)) { |
| 693 | dev_err(&udc->dev->dev, "%s, bad params", __func__); |
| 694 | return -EINVAL; |
| 695 | } |
| 696 | if (unlikely(!_ep || !ep->ep.desc)) { |
| 697 | dev_err(&udc->dev->dev, "%s, bad ep", __func__); |
| 698 | return -EINVAL; |
| 699 | } |
| 700 | |
| 701 | udc = ep->udc; |
| 702 | if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) |
| 703 | return -ESHUTDOWN; |
| 704 | |
| 705 | req->ep = ep; |
| 706 | |
| 707 | /* map virtual address to hardware */ |
| 708 | retval = usb_gadget_map_request(&udc->gadget, _req, ep_dir(ep)); |
| 709 | if (retval) |
| 710 | return retval; |
| 711 | |
| 712 | req->req.status = -EINPROGRESS; |
| 713 | req->req.actual = 0; |
| 714 | req->dtd_count = 0; |
| 715 | |
| 716 | spin_lock_irqsave(&udc->lock, flags); |
| 717 | |
| 718 | /* build dtds and push them to device queue */ |
| 719 | if (!req_to_dtd(req)) { |
| 720 | retval = queue_dtd(ep, req); |
| 721 | if (retval) { |
| 722 | spin_unlock_irqrestore(&udc->lock, flags); |
| 723 | dev_err(&udc->dev->dev, "Failed to queue dtd\n"); |
| 724 | goto err_unmap_dma; |
| 725 | } |
| 726 | } else { |
| 727 | spin_unlock_irqrestore(&udc->lock, flags); |
| 728 | dev_err(&udc->dev->dev, "Failed to dma_pool_alloc\n"); |
| 729 | retval = -ENOMEM; |
| 730 | goto err_unmap_dma; |
| 731 | } |
| 732 | |
| 733 | /* Update ep0 state */ |
| 734 | if (ep->ep_num == 0) |
| 735 | udc->ep0_state = DATA_STATE_XMIT; |
| 736 | |
| 737 | /* irq handler advances the queue */ |
| 738 | list_add_tail(&req->queue, &ep->queue); |
| 739 | spin_unlock_irqrestore(&udc->lock, flags); |
| 740 | |
| 741 | return 0; |
| 742 | |
| 743 | err_unmap_dma: |
| 744 | usb_gadget_unmap_request(&udc->gadget, _req, ep_dir(ep)); |
| 745 | |
| 746 | return retval; |
| 747 | } |
| 748 | |
| 749 | static void mv_prime_ep(struct mv_ep *ep, struct mv_req *req) |
| 750 | { |
| 751 | struct mv_dqh *dqh = ep->dqh; |
| 752 | u32 bit_pos; |
| 753 | |
| 754 | /* Write dQH next pointer and terminate bit to 0 */ |
| 755 | dqh->next_dtd_ptr = req->head->td_dma |
| 756 | & EP_QUEUE_HEAD_NEXT_POINTER_MASK; |
| 757 | |
| 758 | /* clear active and halt bit, in case set from a previous error */ |
| 759 | dqh->size_ioc_int_sts &= ~(DTD_STATUS_ACTIVE | DTD_STATUS_HALTED); |
| 760 | |
| 761 | /* Ensure that updates to the QH will occure before priming. */ |
| 762 | wmb(); |
| 763 | |
| 764 | bit_pos = 1 << (((ep_dir(ep) == EP_DIR_OUT) ? 0 : 16) + ep->ep_num); |
| 765 | |
| 766 | /* Prime the Endpoint */ |
| 767 | writel(bit_pos, &ep->udc->op_regs->epprime); |
| 768 | } |
| 769 | |
| 770 | /* dequeues (cancels, unlinks) an I/O request from an endpoint */ |
| 771 | static int mv_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| 772 | { |
| 773 | struct mv_ep *ep = container_of(_ep, struct mv_ep, ep); |
| 774 | struct mv_req *req = NULL, *iter; |
| 775 | struct mv_udc *udc = ep->udc; |
| 776 | unsigned long flags; |
| 777 | int stopped, ret = 0; |
| 778 | u32 epctrlx; |
| 779 | |
| 780 | if (!_ep || !_req) |
| 781 | return -EINVAL; |
| 782 | |
| 783 | spin_lock_irqsave(&ep->udc->lock, flags); |
| 784 | stopped = ep->stopped; |
| 785 | |
| 786 | /* Stop the ep before we deal with the queue */ |
| 787 | ep->stopped = 1; |
| 788 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); |
| 789 | if (ep_dir(ep) == EP_DIR_IN) |
| 790 | epctrlx &= ~EPCTRL_TX_ENABLE; |
| 791 | else |
| 792 | epctrlx &= ~EPCTRL_RX_ENABLE; |
| 793 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); |
| 794 | |
| 795 | /* make sure it's actually queued on this endpoint */ |
| 796 | list_for_each_entry(iter, &ep->queue, queue) { |
| 797 | if (&iter->req != _req) |
| 798 | continue; |
| 799 | req = iter; |
| 800 | break; |
| 801 | } |
| 802 | if (!req) { |
| 803 | ret = -EINVAL; |
| 804 | goto out; |
| 805 | } |
| 806 | |
| 807 | /* The request is in progress, or completed but not dequeued */ |
| 808 | if (ep->queue.next == &req->queue) { |
| 809 | _req->status = -ECONNRESET; |
| 810 | mv_ep_fifo_flush(_ep); /* flush current transfer */ |
| 811 | |
| 812 | /* The request isn't the last request in this ep queue */ |
| 813 | if (req->queue.next != &ep->queue) { |
| 814 | struct mv_req *next_req; |
| 815 | |
| 816 | next_req = list_entry(req->queue.next, |
| 817 | struct mv_req, queue); |
| 818 | |
| 819 | /* Point the QH to the first TD of next request */ |
| 820 | mv_prime_ep(ep, next_req); |
| 821 | } else { |
| 822 | struct mv_dqh *qh; |
| 823 | |
| 824 | qh = ep->dqh; |
| 825 | qh->next_dtd_ptr = 1; |
| 826 | qh->size_ioc_int_sts = 0; |
| 827 | } |
| 828 | |
| 829 | /* The request hasn't been processed, patch up the TD chain */ |
| 830 | } else { |
| 831 | struct mv_req *prev_req; |
| 832 | |
| 833 | prev_req = list_entry(req->queue.prev, struct mv_req, queue); |
| 834 | writel(readl(&req->tail->dtd_next), |
| 835 | &prev_req->tail->dtd_next); |
| 836 | |
| 837 | } |
| 838 | |
| 839 | done(ep, req, -ECONNRESET); |
| 840 | |
| 841 | /* Enable EP */ |
| 842 | out: |
| 843 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); |
| 844 | if (ep_dir(ep) == EP_DIR_IN) |
| 845 | epctrlx |= EPCTRL_TX_ENABLE; |
| 846 | else |
| 847 | epctrlx |= EPCTRL_RX_ENABLE; |
| 848 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); |
| 849 | ep->stopped = stopped; |
| 850 | |
| 851 | spin_unlock_irqrestore(&ep->udc->lock, flags); |
| 852 | return ret; |
| 853 | } |
| 854 | |
| 855 | static void ep_set_stall(struct mv_udc *udc, u8 ep_num, u8 direction, int stall) |
| 856 | { |
| 857 | u32 epctrlx; |
| 858 | |
| 859 | epctrlx = readl(&udc->op_regs->epctrlx[ep_num]); |
| 860 | |
| 861 | if (stall) { |
| 862 | if (direction == EP_DIR_IN) |
| 863 | epctrlx |= EPCTRL_TX_EP_STALL; |
| 864 | else |
| 865 | epctrlx |= EPCTRL_RX_EP_STALL; |
| 866 | } else { |
| 867 | if (direction == EP_DIR_IN) { |
| 868 | epctrlx &= ~EPCTRL_TX_EP_STALL; |
| 869 | epctrlx |= EPCTRL_TX_DATA_TOGGLE_RST; |
| 870 | } else { |
| 871 | epctrlx &= ~EPCTRL_RX_EP_STALL; |
| 872 | epctrlx |= EPCTRL_RX_DATA_TOGGLE_RST; |
| 873 | } |
| 874 | } |
| 875 | writel(epctrlx, &udc->op_regs->epctrlx[ep_num]); |
| 876 | } |
| 877 | |
| 878 | static int ep_is_stall(struct mv_udc *udc, u8 ep_num, u8 direction) |
| 879 | { |
| 880 | u32 epctrlx; |
| 881 | |
| 882 | epctrlx = readl(&udc->op_regs->epctrlx[ep_num]); |
| 883 | |
| 884 | if (direction == EP_DIR_OUT) |
| 885 | return (epctrlx & EPCTRL_RX_EP_STALL) ? 1 : 0; |
| 886 | else |
| 887 | return (epctrlx & EPCTRL_TX_EP_STALL) ? 1 : 0; |
| 888 | } |
| 889 | |
| 890 | static int mv_ep_set_halt_wedge(struct usb_ep *_ep, int halt, int wedge) |
| 891 | { |
| 892 | struct mv_ep *ep; |
| 893 | unsigned long flags; |
| 894 | int status = 0; |
| 895 | struct mv_udc *udc; |
| 896 | |
| 897 | ep = container_of(_ep, struct mv_ep, ep); |
| 898 | udc = ep->udc; |
| 899 | if (!_ep || !ep->ep.desc) { |
| 900 | status = -EINVAL; |
| 901 | goto out; |
| 902 | } |
| 903 | |
| 904 | if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) { |
| 905 | status = -EOPNOTSUPP; |
| 906 | goto out; |
| 907 | } |
| 908 | |
| 909 | /* |
| 910 | * Attempt to halt IN ep will fail if any transfer requests |
| 911 | * are still queue |
| 912 | */ |
| 913 | if (halt && (ep_dir(ep) == EP_DIR_IN) && !list_empty(&ep->queue)) { |
| 914 | status = -EAGAIN; |
| 915 | goto out; |
| 916 | } |
| 917 | |
| 918 | spin_lock_irqsave(&ep->udc->lock, flags); |
| 919 | ep_set_stall(udc, ep->ep_num, ep_dir(ep), halt); |
| 920 | if (halt && wedge) |
| 921 | ep->wedge = 1; |
| 922 | else if (!halt) |
| 923 | ep->wedge = 0; |
| 924 | spin_unlock_irqrestore(&ep->udc->lock, flags); |
| 925 | |
| 926 | if (ep->ep_num == 0) { |
| 927 | udc->ep0_state = WAIT_FOR_SETUP; |
| 928 | udc->ep0_dir = EP_DIR_OUT; |
| 929 | } |
| 930 | out: |
| 931 | return status; |
| 932 | } |
| 933 | |
| 934 | static int mv_ep_set_halt(struct usb_ep *_ep, int halt) |
| 935 | { |
| 936 | return mv_ep_set_halt_wedge(_ep, halt, 0); |
| 937 | } |
| 938 | |
| 939 | static int mv_ep_set_wedge(struct usb_ep *_ep) |
| 940 | { |
| 941 | return mv_ep_set_halt_wedge(_ep, 1, 1); |
| 942 | } |
| 943 | |
| 944 | static const struct usb_ep_ops mv_ep_ops = { |
| 945 | .enable = mv_ep_enable, |
| 946 | .disable = mv_ep_disable, |
| 947 | |
| 948 | .alloc_request = mv_alloc_request, |
| 949 | .free_request = mv_free_request, |
| 950 | |
| 951 | .queue = mv_ep_queue, |
| 952 | .dequeue = mv_ep_dequeue, |
| 953 | |
| 954 | .set_wedge = mv_ep_set_wedge, |
| 955 | .set_halt = mv_ep_set_halt, |
| 956 | .fifo_flush = mv_ep_fifo_flush, /* flush fifo */ |
| 957 | }; |
| 958 | |
| 959 | static int udc_clock_enable(struct mv_udc *udc) |
| 960 | { |
| 961 | return clk_prepare_enable(udc->clk); |
| 962 | } |
| 963 | |
| 964 | static void udc_clock_disable(struct mv_udc *udc) |
| 965 | { |
| 966 | clk_disable_unprepare(udc->clk); |
| 967 | } |
| 968 | |
| 969 | static void udc_stop(struct mv_udc *udc) |
| 970 | { |
| 971 | u32 tmp; |
| 972 | |
| 973 | /* Disable interrupts */ |
| 974 | tmp = readl(&udc->op_regs->usbintr); |
| 975 | tmp &= ~(USBINTR_INT_EN | USBINTR_ERR_INT_EN | |
| 976 | USBINTR_PORT_CHANGE_DETECT_EN | USBINTR_RESET_EN); |
| 977 | writel(tmp, &udc->op_regs->usbintr); |
| 978 | |
| 979 | udc->stopped = 1; |
| 980 | |
| 981 | /* Reset the Run the bit in the command register to stop VUSB */ |
| 982 | tmp = readl(&udc->op_regs->usbcmd); |
| 983 | tmp &= ~USBCMD_RUN_STOP; |
| 984 | writel(tmp, &udc->op_regs->usbcmd); |
| 985 | } |
| 986 | |
| 987 | static void udc_start(struct mv_udc *udc) |
| 988 | { |
| 989 | u32 usbintr; |
| 990 | |
| 991 | usbintr = USBINTR_INT_EN | USBINTR_ERR_INT_EN |
| 992 | | USBINTR_PORT_CHANGE_DETECT_EN |
| 993 | | USBINTR_RESET_EN | USBINTR_DEVICE_SUSPEND; |
| 994 | /* Enable interrupts */ |
| 995 | writel(usbintr, &udc->op_regs->usbintr); |
| 996 | |
| 997 | udc->stopped = 0; |
| 998 | |
| 999 | /* Set the Run bit in the command register */ |
| 1000 | writel(USBCMD_RUN_STOP, &udc->op_regs->usbcmd); |
| 1001 | } |
| 1002 | |
| 1003 | static int udc_reset(struct mv_udc *udc) |
| 1004 | { |
| 1005 | unsigned int loops; |
| 1006 | u32 tmp, portsc; |
| 1007 | |
| 1008 | /* Stop the controller */ |
| 1009 | tmp = readl(&udc->op_regs->usbcmd); |
| 1010 | tmp &= ~USBCMD_RUN_STOP; |
| 1011 | writel(tmp, &udc->op_regs->usbcmd); |
| 1012 | |
| 1013 | /* Reset the controller to get default values */ |
| 1014 | writel(USBCMD_CTRL_RESET, &udc->op_regs->usbcmd); |
| 1015 | |
| 1016 | /* wait for reset to complete */ |
| 1017 | loops = LOOPS(RESET_TIMEOUT); |
| 1018 | while (readl(&udc->op_regs->usbcmd) & USBCMD_CTRL_RESET) { |
| 1019 | if (loops == 0) { |
| 1020 | dev_err(&udc->dev->dev, |
| 1021 | "Wait for RESET completed TIMEOUT\n"); |
| 1022 | return -ETIMEDOUT; |
| 1023 | } |
| 1024 | loops--; |
| 1025 | udelay(LOOPS_USEC); |
| 1026 | } |
| 1027 | |
| 1028 | /* set controller to device mode */ |
| 1029 | tmp = readl(&udc->op_regs->usbmode); |
| 1030 | tmp |= USBMODE_CTRL_MODE_DEVICE; |
| 1031 | |
| 1032 | /* turn setup lockout off, require setup tripwire in usbcmd */ |
| 1033 | tmp |= USBMODE_SETUP_LOCK_OFF; |
| 1034 | |
| 1035 | writel(tmp, &udc->op_regs->usbmode); |
| 1036 | |
| 1037 | writel(0x0, &udc->op_regs->epsetupstat); |
| 1038 | |
| 1039 | /* Configure the Endpoint List Address */ |
| 1040 | writel(udc->ep_dqh_dma & USB_EP_LIST_ADDRESS_MASK, |
| 1041 | &udc->op_regs->eplistaddr); |
| 1042 | |
| 1043 | portsc = readl(&udc->op_regs->portsc[0]); |
| 1044 | if (readl(&udc->cap_regs->hcsparams) & HCSPARAMS_PPC) |
| 1045 | portsc &= (~PORTSCX_W1C_BITS | ~PORTSCX_PORT_POWER); |
| 1046 | |
| 1047 | if (udc->force_fs) |
| 1048 | portsc |= PORTSCX_FORCE_FULL_SPEED_CONNECT; |
| 1049 | else |
| 1050 | portsc &= (~PORTSCX_FORCE_FULL_SPEED_CONNECT); |
| 1051 | |
| 1052 | writel(portsc, &udc->op_regs->portsc[0]); |
| 1053 | |
| 1054 | tmp = readl(&udc->op_regs->epctrlx[0]); |
| 1055 | tmp &= ~(EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL); |
| 1056 | writel(tmp, &udc->op_regs->epctrlx[0]); |
| 1057 | |
| 1058 | return 0; |
| 1059 | } |
| 1060 | |
| 1061 | static int mv_udc_enable_internal(struct mv_udc *udc) |
| 1062 | { |
| 1063 | int retval; |
| 1064 | |
| 1065 | if (udc->active) |
| 1066 | return 0; |
| 1067 | |
| 1068 | dev_dbg(&udc->dev->dev, "enable udc\n"); |
| 1069 | retval = udc_clock_enable(udc); |
| 1070 | if (retval) |
| 1071 | return retval; |
| 1072 | |
| 1073 | if (udc->pdata->phy_init) { |
| 1074 | retval = udc->pdata->phy_init(udc->phy_regs); |
| 1075 | if (retval) { |
| 1076 | dev_err(&udc->dev->dev, |
| 1077 | "init phy error %d\n", retval); |
| 1078 | udc_clock_disable(udc); |
| 1079 | return retval; |
| 1080 | } |
| 1081 | } |
| 1082 | udc->active = 1; |
| 1083 | |
| 1084 | return 0; |
| 1085 | } |
| 1086 | |
| 1087 | static int mv_udc_enable(struct mv_udc *udc) |
| 1088 | { |
| 1089 | if (udc->clock_gating) |
| 1090 | return mv_udc_enable_internal(udc); |
| 1091 | |
| 1092 | return 0; |
| 1093 | } |
| 1094 | |
| 1095 | static void mv_udc_disable_internal(struct mv_udc *udc) |
| 1096 | { |
| 1097 | if (udc->active) { |
| 1098 | dev_dbg(&udc->dev->dev, "disable udc\n"); |
| 1099 | if (udc->pdata->phy_deinit) |
| 1100 | udc->pdata->phy_deinit(udc->phy_regs); |
| 1101 | udc_clock_disable(udc); |
| 1102 | udc->active = 0; |
| 1103 | } |
| 1104 | } |
| 1105 | |
| 1106 | static void mv_udc_disable(struct mv_udc *udc) |
| 1107 | { |
| 1108 | if (udc->clock_gating) |
| 1109 | mv_udc_disable_internal(udc); |
| 1110 | } |
| 1111 | |
| 1112 | static int mv_udc_get_frame(struct usb_gadget *gadget) |
| 1113 | { |
| 1114 | struct mv_udc *udc; |
| 1115 | u16 retval; |
| 1116 | |
| 1117 | if (!gadget) |
| 1118 | return -ENODEV; |
| 1119 | |
| 1120 | udc = container_of(gadget, struct mv_udc, gadget); |
| 1121 | |
| 1122 | retval = readl(&udc->op_regs->frindex) & USB_FRINDEX_MASKS; |
| 1123 | |
| 1124 | return retval; |
| 1125 | } |
| 1126 | |
| 1127 | /* Tries to wake up the host connected to this gadget */ |
| 1128 | static int mv_udc_wakeup(struct usb_gadget *gadget) |
| 1129 | { |
| 1130 | struct mv_udc *udc = container_of(gadget, struct mv_udc, gadget); |
| 1131 | u32 portsc; |
| 1132 | |
| 1133 | /* Remote wakeup feature not enabled by host */ |
| 1134 | if (!udc->remote_wakeup) |
| 1135 | return -ENOTSUPP; |
| 1136 | |
| 1137 | portsc = readl(&udc->op_regs->portsc); |
| 1138 | /* not suspended? */ |
| 1139 | if (!(portsc & PORTSCX_PORT_SUSPEND)) |
| 1140 | return 0; |
| 1141 | /* trigger force resume */ |
| 1142 | portsc |= PORTSCX_PORT_FORCE_RESUME; |
| 1143 | writel(portsc, &udc->op_regs->portsc[0]); |
| 1144 | return 0; |
| 1145 | } |
| 1146 | |
| 1147 | static int mv_udc_vbus_session(struct usb_gadget *gadget, int is_active) |
| 1148 | { |
| 1149 | struct mv_udc *udc; |
| 1150 | unsigned long flags; |
| 1151 | int retval = 0; |
| 1152 | |
| 1153 | udc = container_of(gadget, struct mv_udc, gadget); |
| 1154 | spin_lock_irqsave(&udc->lock, flags); |
| 1155 | |
| 1156 | udc->vbus_active = (is_active != 0); |
| 1157 | |
| 1158 | dev_dbg(&udc->dev->dev, "%s: softconnect %d, vbus_active %d\n", |
| 1159 | __func__, udc->softconnect, udc->vbus_active); |
| 1160 | |
| 1161 | if (udc->driver && udc->softconnect && udc->vbus_active) { |
| 1162 | retval = mv_udc_enable(udc); |
| 1163 | if (retval == 0) { |
| 1164 | /* Clock is disabled, need re-init registers */ |
| 1165 | udc_reset(udc); |
| 1166 | ep0_reset(udc); |
| 1167 | udc_start(udc); |
| 1168 | } |
| 1169 | } else if (udc->driver && udc->softconnect) { |
| 1170 | if (!udc->active) |
| 1171 | goto out; |
| 1172 | |
| 1173 | /* stop all the transfer in queue*/ |
| 1174 | stop_activity(udc, udc->driver); |
| 1175 | udc_stop(udc); |
| 1176 | mv_udc_disable(udc); |
| 1177 | } |
| 1178 | |
| 1179 | out: |
| 1180 | spin_unlock_irqrestore(&udc->lock, flags); |
| 1181 | return retval; |
| 1182 | } |
| 1183 | |
| 1184 | static int mv_udc_pullup(struct usb_gadget *gadget, int is_on) |
| 1185 | { |
| 1186 | struct mv_udc *udc; |
| 1187 | unsigned long flags; |
| 1188 | int retval = 0; |
| 1189 | |
| 1190 | udc = container_of(gadget, struct mv_udc, gadget); |
| 1191 | spin_lock_irqsave(&udc->lock, flags); |
| 1192 | |
| 1193 | udc->softconnect = (is_on != 0); |
| 1194 | |
| 1195 | dev_dbg(&udc->dev->dev, "%s: softconnect %d, vbus_active %d\n", |
| 1196 | __func__, udc->softconnect, udc->vbus_active); |
| 1197 | |
| 1198 | if (udc->driver && udc->softconnect && udc->vbus_active) { |
| 1199 | retval = mv_udc_enable(udc); |
| 1200 | if (retval == 0) { |
| 1201 | /* Clock is disabled, need re-init registers */ |
| 1202 | udc_reset(udc); |
| 1203 | ep0_reset(udc); |
| 1204 | udc_start(udc); |
| 1205 | } |
| 1206 | } else if (udc->driver && udc->vbus_active) { |
| 1207 | /* stop all the transfer in queue*/ |
| 1208 | stop_activity(udc, udc->driver); |
| 1209 | udc_stop(udc); |
| 1210 | mv_udc_disable(udc); |
| 1211 | } |
| 1212 | |
| 1213 | spin_unlock_irqrestore(&udc->lock, flags); |
| 1214 | return retval; |
| 1215 | } |
| 1216 | |
| 1217 | static int mv_udc_start(struct usb_gadget *, struct usb_gadget_driver *); |
| 1218 | static int mv_udc_stop(struct usb_gadget *); |
| 1219 | /* device controller usb_gadget_ops structure */ |
| 1220 | static const struct usb_gadget_ops mv_ops = { |
| 1221 | |
| 1222 | /* returns the current frame number */ |
| 1223 | .get_frame = mv_udc_get_frame, |
| 1224 | |
| 1225 | /* tries to wake up the host connected to this gadget */ |
| 1226 | .wakeup = mv_udc_wakeup, |
| 1227 | |
| 1228 | /* notify controller that VBUS is powered or not */ |
| 1229 | .vbus_session = mv_udc_vbus_session, |
| 1230 | |
| 1231 | /* D+ pullup, software-controlled connect/disconnect to USB host */ |
| 1232 | .pullup = mv_udc_pullup, |
| 1233 | .udc_start = mv_udc_start, |
| 1234 | .udc_stop = mv_udc_stop, |
| 1235 | }; |
| 1236 | |
| 1237 | static int eps_init(struct mv_udc *udc) |
| 1238 | { |
| 1239 | struct mv_ep *ep; |
| 1240 | char name[14]; |
| 1241 | int i; |
| 1242 | |
| 1243 | /* initialize ep0 */ |
| 1244 | ep = &udc->eps[0]; |
| 1245 | ep->udc = udc; |
| 1246 | strncpy(ep->name, "ep0", sizeof(ep->name)); |
| 1247 | ep->ep.name = ep->name; |
| 1248 | ep->ep.ops = &mv_ep_ops; |
| 1249 | ep->wedge = 0; |
| 1250 | ep->stopped = 0; |
| 1251 | usb_ep_set_maxpacket_limit(&ep->ep, EP0_MAX_PKT_SIZE); |
| 1252 | ep->ep.caps.type_control = true; |
| 1253 | ep->ep.caps.dir_in = true; |
| 1254 | ep->ep.caps.dir_out = true; |
| 1255 | ep->ep_num = 0; |
| 1256 | ep->ep.desc = &mv_ep0_desc; |
| 1257 | INIT_LIST_HEAD(&ep->queue); |
| 1258 | |
| 1259 | ep->ep_type = USB_ENDPOINT_XFER_CONTROL; |
| 1260 | |
| 1261 | /* initialize other endpoints */ |
| 1262 | for (i = 2; i < udc->max_eps * 2; i++) { |
| 1263 | ep = &udc->eps[i]; |
| 1264 | if (i % 2) { |
| 1265 | snprintf(name, sizeof(name), "ep%din", i / 2); |
| 1266 | ep->direction = EP_DIR_IN; |
| 1267 | ep->ep.caps.dir_in = true; |
| 1268 | } else { |
| 1269 | snprintf(name, sizeof(name), "ep%dout", i / 2); |
| 1270 | ep->direction = EP_DIR_OUT; |
| 1271 | ep->ep.caps.dir_out = true; |
| 1272 | } |
| 1273 | ep->udc = udc; |
| 1274 | strncpy(ep->name, name, sizeof(ep->name)); |
| 1275 | ep->ep.name = ep->name; |
| 1276 | |
| 1277 | ep->ep.caps.type_iso = true; |
| 1278 | ep->ep.caps.type_bulk = true; |
| 1279 | ep->ep.caps.type_int = true; |
| 1280 | |
| 1281 | ep->ep.ops = &mv_ep_ops; |
| 1282 | ep->stopped = 0; |
| 1283 | usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0); |
| 1284 | ep->ep_num = i / 2; |
| 1285 | |
| 1286 | INIT_LIST_HEAD(&ep->queue); |
| 1287 | list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); |
| 1288 | |
| 1289 | ep->dqh = &udc->ep_dqh[i]; |
| 1290 | } |
| 1291 | |
| 1292 | return 0; |
| 1293 | } |
| 1294 | |
| 1295 | /* delete all endpoint requests, called with spinlock held */ |
| 1296 | static void nuke(struct mv_ep *ep, int status) |
| 1297 | { |
| 1298 | /* called with spinlock held */ |
| 1299 | ep->stopped = 1; |
| 1300 | |
| 1301 | /* endpoint fifo flush */ |
| 1302 | mv_ep_fifo_flush(&ep->ep); |
| 1303 | |
| 1304 | while (!list_empty(&ep->queue)) { |
| 1305 | struct mv_req *req = NULL; |
| 1306 | req = list_entry(ep->queue.next, struct mv_req, queue); |
| 1307 | done(ep, req, status); |
| 1308 | } |
| 1309 | } |
| 1310 | |
| 1311 | static void gadget_reset(struct mv_udc *udc, struct usb_gadget_driver *driver) |
| 1312 | { |
| 1313 | struct mv_ep *ep; |
| 1314 | |
| 1315 | nuke(&udc->eps[0], -ESHUTDOWN); |
| 1316 | |
| 1317 | list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) { |
| 1318 | nuke(ep, -ESHUTDOWN); |
| 1319 | } |
| 1320 | |
| 1321 | /* report reset; the driver is already quiesced */ |
| 1322 | if (driver) { |
| 1323 | spin_unlock(&udc->lock); |
| 1324 | usb_gadget_udc_reset(&udc->gadget, driver); |
| 1325 | spin_lock(&udc->lock); |
| 1326 | } |
| 1327 | } |
| 1328 | /* stop all USB activities */ |
| 1329 | static void stop_activity(struct mv_udc *udc, struct usb_gadget_driver *driver) |
| 1330 | { |
| 1331 | struct mv_ep *ep; |
| 1332 | |
| 1333 | nuke(&udc->eps[0], -ESHUTDOWN); |
| 1334 | |
| 1335 | list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) { |
| 1336 | nuke(ep, -ESHUTDOWN); |
| 1337 | } |
| 1338 | |
| 1339 | /* report disconnect; the driver is already quiesced */ |
| 1340 | if (driver) { |
| 1341 | spin_unlock(&udc->lock); |
| 1342 | driver->disconnect(&udc->gadget); |
| 1343 | spin_lock(&udc->lock); |
| 1344 | } |
| 1345 | } |
| 1346 | |
| 1347 | static int mv_udc_start(struct usb_gadget *gadget, |
| 1348 | struct usb_gadget_driver *driver) |
| 1349 | { |
| 1350 | struct mv_udc *udc; |
| 1351 | int retval = 0; |
| 1352 | unsigned long flags; |
| 1353 | |
| 1354 | udc = container_of(gadget, struct mv_udc, gadget); |
| 1355 | |
| 1356 | if (udc->driver) |
| 1357 | return -EBUSY; |
| 1358 | |
| 1359 | spin_lock_irqsave(&udc->lock, flags); |
| 1360 | |
| 1361 | /* hook up the driver ... */ |
| 1362 | udc->driver = driver; |
| 1363 | |
| 1364 | udc->usb_state = USB_STATE_ATTACHED; |
| 1365 | udc->ep0_state = WAIT_FOR_SETUP; |
| 1366 | udc->ep0_dir = EP_DIR_OUT; |
| 1367 | |
| 1368 | spin_unlock_irqrestore(&udc->lock, flags); |
| 1369 | |
| 1370 | if (udc->transceiver) { |
| 1371 | retval = otg_set_peripheral(udc->transceiver->otg, |
| 1372 | &udc->gadget); |
| 1373 | if (retval) { |
| 1374 | dev_err(&udc->dev->dev, |
| 1375 | "unable to register peripheral to otg\n"); |
| 1376 | udc->driver = NULL; |
| 1377 | return retval; |
| 1378 | } |
| 1379 | } |
| 1380 | |
| 1381 | /* When boot with cable attached, there will be no vbus irq occurred */ |
| 1382 | if (udc->qwork) |
| 1383 | queue_work(udc->qwork, &udc->vbus_work); |
| 1384 | |
| 1385 | return 0; |
| 1386 | } |
| 1387 | |
| 1388 | static int mv_udc_stop(struct usb_gadget *gadget) |
| 1389 | { |
| 1390 | struct mv_udc *udc; |
| 1391 | unsigned long flags; |
| 1392 | |
| 1393 | udc = container_of(gadget, struct mv_udc, gadget); |
| 1394 | |
| 1395 | spin_lock_irqsave(&udc->lock, flags); |
| 1396 | |
| 1397 | mv_udc_enable(udc); |
| 1398 | udc_stop(udc); |
| 1399 | |
| 1400 | /* stop all usb activities */ |
| 1401 | udc->gadget.speed = USB_SPEED_UNKNOWN; |
| 1402 | stop_activity(udc, NULL); |
| 1403 | mv_udc_disable(udc); |
| 1404 | |
| 1405 | spin_unlock_irqrestore(&udc->lock, flags); |
| 1406 | |
| 1407 | /* unbind gadget driver */ |
| 1408 | udc->driver = NULL; |
| 1409 | |
| 1410 | return 0; |
| 1411 | } |
| 1412 | |
| 1413 | static void mv_set_ptc(struct mv_udc *udc, u32 mode) |
| 1414 | { |
| 1415 | u32 portsc; |
| 1416 | |
| 1417 | portsc = readl(&udc->op_regs->portsc[0]); |
| 1418 | portsc |= mode << 16; |
| 1419 | writel(portsc, &udc->op_regs->portsc[0]); |
| 1420 | } |
| 1421 | |
| 1422 | static void prime_status_complete(struct usb_ep *ep, struct usb_request *_req) |
| 1423 | { |
| 1424 | struct mv_ep *mvep = container_of(ep, struct mv_ep, ep); |
| 1425 | struct mv_req *req = container_of(_req, struct mv_req, req); |
| 1426 | struct mv_udc *udc; |
| 1427 | unsigned long flags; |
| 1428 | |
| 1429 | udc = mvep->udc; |
| 1430 | |
| 1431 | dev_info(&udc->dev->dev, "switch to test mode %d\n", req->test_mode); |
| 1432 | |
| 1433 | spin_lock_irqsave(&udc->lock, flags); |
| 1434 | if (req->test_mode) { |
| 1435 | mv_set_ptc(udc, req->test_mode); |
| 1436 | req->test_mode = 0; |
| 1437 | } |
| 1438 | spin_unlock_irqrestore(&udc->lock, flags); |
| 1439 | } |
| 1440 | |
| 1441 | static int |
| 1442 | udc_prime_status(struct mv_udc *udc, u8 direction, u16 status, bool empty) |
| 1443 | { |
| 1444 | int retval = 0; |
| 1445 | struct mv_req *req; |
| 1446 | struct mv_ep *ep; |
| 1447 | |
| 1448 | ep = &udc->eps[0]; |
| 1449 | udc->ep0_dir = direction; |
| 1450 | udc->ep0_state = WAIT_FOR_OUT_STATUS; |
| 1451 | |
| 1452 | req = udc->status_req; |
| 1453 | |
| 1454 | /* fill in the request structure */ |
| 1455 | if (empty == false) { |
| 1456 | *((u16 *) req->req.buf) = cpu_to_le16(status); |
| 1457 | req->req.length = 2; |
| 1458 | } else |
| 1459 | req->req.length = 0; |
| 1460 | |
| 1461 | req->ep = ep; |
| 1462 | req->req.status = -EINPROGRESS; |
| 1463 | req->req.actual = 0; |
| 1464 | if (udc->test_mode) { |
| 1465 | req->req.complete = prime_status_complete; |
| 1466 | req->test_mode = udc->test_mode; |
| 1467 | udc->test_mode = 0; |
| 1468 | } else |
| 1469 | req->req.complete = NULL; |
| 1470 | req->dtd_count = 0; |
| 1471 | |
| 1472 | if (req->req.dma == DMA_ADDR_INVALID) { |
| 1473 | req->req.dma = dma_map_single(ep->udc->gadget.dev.parent, |
| 1474 | req->req.buf, req->req.length, |
| 1475 | ep_dir(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| 1476 | req->mapped = 1; |
| 1477 | } |
| 1478 | |
| 1479 | /* prime the data phase */ |
| 1480 | if (!req_to_dtd(req)) { |
| 1481 | retval = queue_dtd(ep, req); |
| 1482 | if (retval) { |
| 1483 | dev_err(&udc->dev->dev, |
| 1484 | "Failed to queue dtd when prime status\n"); |
| 1485 | goto out; |
| 1486 | } |
| 1487 | } else{ /* no mem */ |
| 1488 | retval = -ENOMEM; |
| 1489 | dev_err(&udc->dev->dev, |
| 1490 | "Failed to dma_pool_alloc when prime status\n"); |
| 1491 | goto out; |
| 1492 | } |
| 1493 | |
| 1494 | list_add_tail(&req->queue, &ep->queue); |
| 1495 | |
| 1496 | return 0; |
| 1497 | out: |
| 1498 | usb_gadget_unmap_request(&udc->gadget, &req->req, ep_dir(ep)); |
| 1499 | |
| 1500 | return retval; |
| 1501 | } |
| 1502 | |
| 1503 | static void mv_udc_testmode(struct mv_udc *udc, u16 index) |
| 1504 | { |
| 1505 | if (index <= USB_TEST_FORCE_ENABLE) { |
| 1506 | udc->test_mode = index; |
| 1507 | if (udc_prime_status(udc, EP_DIR_IN, 0, true)) |
| 1508 | ep0_stall(udc); |
| 1509 | } else |
| 1510 | dev_err(&udc->dev->dev, |
| 1511 | "This test mode(%d) is not supported\n", index); |
| 1512 | } |
| 1513 | |
| 1514 | static void ch9setaddress(struct mv_udc *udc, struct usb_ctrlrequest *setup) |
| 1515 | { |
| 1516 | udc->dev_addr = (u8)setup->wValue; |
| 1517 | |
| 1518 | /* update usb state */ |
| 1519 | udc->usb_state = USB_STATE_ADDRESS; |
| 1520 | |
| 1521 | if (udc_prime_status(udc, EP_DIR_IN, 0, true)) |
| 1522 | ep0_stall(udc); |
| 1523 | } |
| 1524 | |
| 1525 | static void ch9getstatus(struct mv_udc *udc, u8 ep_num, |
| 1526 | struct usb_ctrlrequest *setup) |
| 1527 | { |
| 1528 | u16 status = 0; |
| 1529 | int retval; |
| 1530 | |
| 1531 | if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK)) |
| 1532 | != (USB_DIR_IN | USB_TYPE_STANDARD)) |
| 1533 | return; |
| 1534 | |
| 1535 | if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) { |
| 1536 | status = 1 << USB_DEVICE_SELF_POWERED; |
| 1537 | status |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP; |
| 1538 | } else if ((setup->bRequestType & USB_RECIP_MASK) |
| 1539 | == USB_RECIP_INTERFACE) { |
| 1540 | /* get interface status */ |
| 1541 | status = 0; |
| 1542 | } else if ((setup->bRequestType & USB_RECIP_MASK) |
| 1543 | == USB_RECIP_ENDPOINT) { |
| 1544 | u8 ep_num, direction; |
| 1545 | |
| 1546 | ep_num = setup->wIndex & USB_ENDPOINT_NUMBER_MASK; |
| 1547 | direction = (setup->wIndex & USB_ENDPOINT_DIR_MASK) |
| 1548 | ? EP_DIR_IN : EP_DIR_OUT; |
| 1549 | status = ep_is_stall(udc, ep_num, direction) |
| 1550 | << USB_ENDPOINT_HALT; |
| 1551 | } |
| 1552 | |
| 1553 | retval = udc_prime_status(udc, EP_DIR_IN, status, false); |
| 1554 | if (retval) |
| 1555 | ep0_stall(udc); |
| 1556 | else |
| 1557 | udc->ep0_state = DATA_STATE_XMIT; |
| 1558 | } |
| 1559 | |
| 1560 | static void ch9clearfeature(struct mv_udc *udc, struct usb_ctrlrequest *setup) |
| 1561 | { |
| 1562 | u8 ep_num; |
| 1563 | u8 direction; |
| 1564 | struct mv_ep *ep; |
| 1565 | |
| 1566 | if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) |
| 1567 | == ((USB_TYPE_STANDARD | USB_RECIP_DEVICE))) { |
| 1568 | switch (setup->wValue) { |
| 1569 | case USB_DEVICE_REMOTE_WAKEUP: |
| 1570 | udc->remote_wakeup = 0; |
| 1571 | break; |
| 1572 | default: |
| 1573 | goto out; |
| 1574 | } |
| 1575 | } else if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) |
| 1576 | == ((USB_TYPE_STANDARD | USB_RECIP_ENDPOINT))) { |
| 1577 | switch (setup->wValue) { |
| 1578 | case USB_ENDPOINT_HALT: |
| 1579 | ep_num = setup->wIndex & USB_ENDPOINT_NUMBER_MASK; |
| 1580 | direction = (setup->wIndex & USB_ENDPOINT_DIR_MASK) |
| 1581 | ? EP_DIR_IN : EP_DIR_OUT; |
| 1582 | if (setup->wValue != 0 || setup->wLength != 0 |
| 1583 | || ep_num > udc->max_eps) |
| 1584 | goto out; |
| 1585 | ep = &udc->eps[ep_num * 2 + direction]; |
| 1586 | if (ep->wedge == 1) |
| 1587 | break; |
| 1588 | spin_unlock(&udc->lock); |
| 1589 | ep_set_stall(udc, ep_num, direction, 0); |
| 1590 | spin_lock(&udc->lock); |
| 1591 | break; |
| 1592 | default: |
| 1593 | goto out; |
| 1594 | } |
| 1595 | } else |
| 1596 | goto out; |
| 1597 | |
| 1598 | if (udc_prime_status(udc, EP_DIR_IN, 0, true)) |
| 1599 | ep0_stall(udc); |
| 1600 | out: |
| 1601 | return; |
| 1602 | } |
| 1603 | |
| 1604 | static void ch9setfeature(struct mv_udc *udc, struct usb_ctrlrequest *setup) |
| 1605 | { |
| 1606 | u8 ep_num; |
| 1607 | u8 direction; |
| 1608 | |
| 1609 | if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) |
| 1610 | == ((USB_TYPE_STANDARD | USB_RECIP_DEVICE))) { |
| 1611 | switch (setup->wValue) { |
| 1612 | case USB_DEVICE_REMOTE_WAKEUP: |
| 1613 | udc->remote_wakeup = 1; |
| 1614 | break; |
| 1615 | case USB_DEVICE_TEST_MODE: |
| 1616 | if (setup->wIndex & 0xFF |
| 1617 | || udc->gadget.speed != USB_SPEED_HIGH) |
| 1618 | ep0_stall(udc); |
| 1619 | |
| 1620 | if (udc->usb_state != USB_STATE_CONFIGURED |
| 1621 | && udc->usb_state != USB_STATE_ADDRESS |
| 1622 | && udc->usb_state != USB_STATE_DEFAULT) |
| 1623 | ep0_stall(udc); |
| 1624 | |
| 1625 | mv_udc_testmode(udc, (setup->wIndex >> 8)); |
| 1626 | goto out; |
| 1627 | default: |
| 1628 | goto out; |
| 1629 | } |
| 1630 | } else if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) |
| 1631 | == ((USB_TYPE_STANDARD | USB_RECIP_ENDPOINT))) { |
| 1632 | switch (setup->wValue) { |
| 1633 | case USB_ENDPOINT_HALT: |
| 1634 | ep_num = setup->wIndex & USB_ENDPOINT_NUMBER_MASK; |
| 1635 | direction = (setup->wIndex & USB_ENDPOINT_DIR_MASK) |
| 1636 | ? EP_DIR_IN : EP_DIR_OUT; |
| 1637 | if (setup->wValue != 0 || setup->wLength != 0 |
| 1638 | || ep_num > udc->max_eps) |
| 1639 | goto out; |
| 1640 | spin_unlock(&udc->lock); |
| 1641 | ep_set_stall(udc, ep_num, direction, 1); |
| 1642 | spin_lock(&udc->lock); |
| 1643 | break; |
| 1644 | default: |
| 1645 | goto out; |
| 1646 | } |
| 1647 | } else |
| 1648 | goto out; |
| 1649 | |
| 1650 | if (udc_prime_status(udc, EP_DIR_IN, 0, true)) |
| 1651 | ep0_stall(udc); |
| 1652 | out: |
| 1653 | return; |
| 1654 | } |
| 1655 | |
| 1656 | static void handle_setup_packet(struct mv_udc *udc, u8 ep_num, |
| 1657 | struct usb_ctrlrequest *setup) |
| 1658 | __releases(&ep->udc->lock) |
| 1659 | __acquires(&ep->udc->lock) |
| 1660 | { |
| 1661 | bool delegate = false; |
| 1662 | |
| 1663 | nuke(&udc->eps[ep_num * 2 + EP_DIR_OUT], -ESHUTDOWN); |
| 1664 | |
| 1665 | dev_dbg(&udc->dev->dev, "SETUP %02x.%02x v%04x i%04x l%04x\n", |
| 1666 | setup->bRequestType, setup->bRequest, |
| 1667 | setup->wValue, setup->wIndex, setup->wLength); |
| 1668 | /* We process some standard setup requests here */ |
| 1669 | if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { |
| 1670 | switch (setup->bRequest) { |
| 1671 | case USB_REQ_GET_STATUS: |
| 1672 | ch9getstatus(udc, ep_num, setup); |
| 1673 | break; |
| 1674 | |
| 1675 | case USB_REQ_SET_ADDRESS: |
| 1676 | ch9setaddress(udc, setup); |
| 1677 | break; |
| 1678 | |
| 1679 | case USB_REQ_CLEAR_FEATURE: |
| 1680 | ch9clearfeature(udc, setup); |
| 1681 | break; |
| 1682 | |
| 1683 | case USB_REQ_SET_FEATURE: |
| 1684 | ch9setfeature(udc, setup); |
| 1685 | break; |
| 1686 | |
| 1687 | default: |
| 1688 | delegate = true; |
| 1689 | } |
| 1690 | } else |
| 1691 | delegate = true; |
| 1692 | |
| 1693 | /* delegate USB standard requests to the gadget driver */ |
| 1694 | if (delegate == true) { |
| 1695 | /* USB requests handled by gadget */ |
| 1696 | if (setup->wLength) { |
| 1697 | /* DATA phase from gadget, STATUS phase from udc */ |
| 1698 | udc->ep0_dir = (setup->bRequestType & USB_DIR_IN) |
| 1699 | ? EP_DIR_IN : EP_DIR_OUT; |
| 1700 | spin_unlock(&udc->lock); |
| 1701 | if (udc->driver->setup(&udc->gadget, |
| 1702 | &udc->local_setup_buff) < 0) |
| 1703 | ep0_stall(udc); |
| 1704 | spin_lock(&udc->lock); |
| 1705 | udc->ep0_state = (setup->bRequestType & USB_DIR_IN) |
| 1706 | ? DATA_STATE_XMIT : DATA_STATE_RECV; |
| 1707 | } else { |
| 1708 | /* no DATA phase, IN STATUS phase from gadget */ |
| 1709 | udc->ep0_dir = EP_DIR_IN; |
| 1710 | spin_unlock(&udc->lock); |
| 1711 | if (udc->driver->setup(&udc->gadget, |
| 1712 | &udc->local_setup_buff) < 0) |
| 1713 | ep0_stall(udc); |
| 1714 | spin_lock(&udc->lock); |
| 1715 | udc->ep0_state = WAIT_FOR_OUT_STATUS; |
| 1716 | } |
| 1717 | } |
| 1718 | } |
| 1719 | |
| 1720 | /* complete DATA or STATUS phase of ep0 prime status phase if needed */ |
| 1721 | static void ep0_req_complete(struct mv_udc *udc, |
| 1722 | struct mv_ep *ep0, struct mv_req *req) |
| 1723 | { |
| 1724 | u32 new_addr; |
| 1725 | |
| 1726 | if (udc->usb_state == USB_STATE_ADDRESS) { |
| 1727 | /* set the new address */ |
| 1728 | new_addr = (u32)udc->dev_addr; |
| 1729 | writel(new_addr << USB_DEVICE_ADDRESS_BIT_SHIFT, |
| 1730 | &udc->op_regs->deviceaddr); |
| 1731 | } |
| 1732 | |
| 1733 | done(ep0, req, 0); |
| 1734 | |
| 1735 | switch (udc->ep0_state) { |
| 1736 | case DATA_STATE_XMIT: |
| 1737 | /* receive status phase */ |
| 1738 | if (udc_prime_status(udc, EP_DIR_OUT, 0, true)) |
| 1739 | ep0_stall(udc); |
| 1740 | break; |
| 1741 | case DATA_STATE_RECV: |
| 1742 | /* send status phase */ |
| 1743 | if (udc_prime_status(udc, EP_DIR_IN, 0 , true)) |
| 1744 | ep0_stall(udc); |
| 1745 | break; |
| 1746 | case WAIT_FOR_OUT_STATUS: |
| 1747 | udc->ep0_state = WAIT_FOR_SETUP; |
| 1748 | break; |
| 1749 | case WAIT_FOR_SETUP: |
| 1750 | dev_err(&udc->dev->dev, "unexpect ep0 packets\n"); |
| 1751 | break; |
| 1752 | default: |
| 1753 | ep0_stall(udc); |
| 1754 | break; |
| 1755 | } |
| 1756 | } |
| 1757 | |
| 1758 | static void get_setup_data(struct mv_udc *udc, u8 ep_num, u8 *buffer_ptr) |
| 1759 | { |
| 1760 | u32 temp; |
| 1761 | struct mv_dqh *dqh; |
| 1762 | |
| 1763 | dqh = &udc->ep_dqh[ep_num * 2 + EP_DIR_OUT]; |
| 1764 | |
| 1765 | /* Clear bit in ENDPTSETUPSTAT */ |
| 1766 | writel((1 << ep_num), &udc->op_regs->epsetupstat); |
| 1767 | |
| 1768 | /* while a hazard exists when setup package arrives */ |
| 1769 | do { |
| 1770 | /* Set Setup Tripwire */ |
| 1771 | temp = readl(&udc->op_regs->usbcmd); |
| 1772 | writel(temp | USBCMD_SETUP_TRIPWIRE_SET, &udc->op_regs->usbcmd); |
| 1773 | |
| 1774 | /* Copy the setup packet to local buffer */ |
| 1775 | memcpy(buffer_ptr, (u8 *) dqh->setup_buffer, 8); |
| 1776 | } while (!(readl(&udc->op_regs->usbcmd) & USBCMD_SETUP_TRIPWIRE_SET)); |
| 1777 | |
| 1778 | /* Clear Setup Tripwire */ |
| 1779 | temp = readl(&udc->op_regs->usbcmd); |
| 1780 | writel(temp & ~USBCMD_SETUP_TRIPWIRE_SET, &udc->op_regs->usbcmd); |
| 1781 | } |
| 1782 | |
| 1783 | static void irq_process_tr_complete(struct mv_udc *udc) |
| 1784 | { |
| 1785 | u32 tmp, bit_pos; |
| 1786 | int i, ep_num = 0, direction = 0; |
| 1787 | struct mv_ep *curr_ep; |
| 1788 | struct mv_req *curr_req, *temp_req; |
| 1789 | int status; |
| 1790 | |
| 1791 | /* |
| 1792 | * We use separate loops for ENDPTSETUPSTAT and ENDPTCOMPLETE |
| 1793 | * because the setup packets are to be read ASAP |
| 1794 | */ |
| 1795 | |
| 1796 | /* Process all Setup packet received interrupts */ |
| 1797 | tmp = readl(&udc->op_regs->epsetupstat); |
| 1798 | |
| 1799 | if (tmp) { |
| 1800 | for (i = 0; i < udc->max_eps; i++) { |
| 1801 | if (tmp & (1 << i)) { |
| 1802 | get_setup_data(udc, i, |
| 1803 | (u8 *)(&udc->local_setup_buff)); |
| 1804 | handle_setup_packet(udc, i, |
| 1805 | &udc->local_setup_buff); |
| 1806 | } |
| 1807 | } |
| 1808 | } |
| 1809 | |
| 1810 | /* Don't clear the endpoint setup status register here. |
| 1811 | * It is cleared as a setup packet is read out of the buffer |
| 1812 | */ |
| 1813 | |
| 1814 | /* Process non-setup transaction complete interrupts */ |
| 1815 | tmp = readl(&udc->op_regs->epcomplete); |
| 1816 | |
| 1817 | if (!tmp) |
| 1818 | return; |
| 1819 | |
| 1820 | writel(tmp, &udc->op_regs->epcomplete); |
| 1821 | |
| 1822 | for (i = 0; i < udc->max_eps * 2; i++) { |
| 1823 | ep_num = i >> 1; |
| 1824 | direction = i % 2; |
| 1825 | |
| 1826 | bit_pos = 1 << (ep_num + 16 * direction); |
| 1827 | |
| 1828 | if (!(bit_pos & tmp)) |
| 1829 | continue; |
| 1830 | |
| 1831 | if (i == 1) |
| 1832 | curr_ep = &udc->eps[0]; |
| 1833 | else |
| 1834 | curr_ep = &udc->eps[i]; |
| 1835 | /* process the req queue until an uncomplete request */ |
| 1836 | list_for_each_entry_safe(curr_req, temp_req, |
| 1837 | &curr_ep->queue, queue) { |
| 1838 | status = process_ep_req(udc, i, curr_req); |
| 1839 | if (status) |
| 1840 | break; |
| 1841 | |
| 1842 | /* write back status to req */ |
| 1843 | curr_req->req.status = status; |
| 1844 | |
| 1845 | /* ep0 request completion */ |
| 1846 | if (ep_num == 0) { |
| 1847 | ep0_req_complete(udc, curr_ep, curr_req); |
| 1848 | break; |
| 1849 | } else { |
| 1850 | done(curr_ep, curr_req, status); |
| 1851 | } |
| 1852 | } |
| 1853 | } |
| 1854 | } |
| 1855 | |
| 1856 | static void irq_process_reset(struct mv_udc *udc) |
| 1857 | { |
| 1858 | u32 tmp; |
| 1859 | unsigned int loops; |
| 1860 | |
| 1861 | udc->ep0_dir = EP_DIR_OUT; |
| 1862 | udc->ep0_state = WAIT_FOR_SETUP; |
| 1863 | udc->remote_wakeup = 0; /* default to 0 on reset */ |
| 1864 | |
| 1865 | /* The address bits are past bit 25-31. Set the address */ |
| 1866 | tmp = readl(&udc->op_regs->deviceaddr); |
| 1867 | tmp &= ~(USB_DEVICE_ADDRESS_MASK); |
| 1868 | writel(tmp, &udc->op_regs->deviceaddr); |
| 1869 | |
| 1870 | /* Clear all the setup token semaphores */ |
| 1871 | tmp = readl(&udc->op_regs->epsetupstat); |
| 1872 | writel(tmp, &udc->op_regs->epsetupstat); |
| 1873 | |
| 1874 | /* Clear all the endpoint complete status bits */ |
| 1875 | tmp = readl(&udc->op_regs->epcomplete); |
| 1876 | writel(tmp, &udc->op_regs->epcomplete); |
| 1877 | |
| 1878 | /* wait until all endptprime bits cleared */ |
| 1879 | loops = LOOPS(PRIME_TIMEOUT); |
| 1880 | while (readl(&udc->op_regs->epprime) & 0xFFFFFFFF) { |
| 1881 | if (loops == 0) { |
| 1882 | dev_err(&udc->dev->dev, |
| 1883 | "Timeout for ENDPTPRIME = 0x%x\n", |
| 1884 | readl(&udc->op_regs->epprime)); |
| 1885 | break; |
| 1886 | } |
| 1887 | loops--; |
| 1888 | udelay(LOOPS_USEC); |
| 1889 | } |
| 1890 | |
| 1891 | /* Write 1s to the Flush register */ |
| 1892 | writel((u32)~0, &udc->op_regs->epflush); |
| 1893 | |
| 1894 | if (readl(&udc->op_regs->portsc[0]) & PORTSCX_PORT_RESET) { |
| 1895 | dev_info(&udc->dev->dev, "usb bus reset\n"); |
| 1896 | udc->usb_state = USB_STATE_DEFAULT; |
| 1897 | /* reset all the queues, stop all USB activities */ |
| 1898 | gadget_reset(udc, udc->driver); |
| 1899 | } else { |
| 1900 | dev_info(&udc->dev->dev, "USB reset portsc 0x%x\n", |
| 1901 | readl(&udc->op_regs->portsc)); |
| 1902 | |
| 1903 | /* |
| 1904 | * re-initialize |
| 1905 | * controller reset |
| 1906 | */ |
| 1907 | udc_reset(udc); |
| 1908 | |
| 1909 | /* reset all the queues, stop all USB activities */ |
| 1910 | stop_activity(udc, udc->driver); |
| 1911 | |
| 1912 | /* reset ep0 dQH and endptctrl */ |
| 1913 | ep0_reset(udc); |
| 1914 | |
| 1915 | /* enable interrupt and set controller to run state */ |
| 1916 | udc_start(udc); |
| 1917 | |
| 1918 | udc->usb_state = USB_STATE_ATTACHED; |
| 1919 | } |
| 1920 | } |
| 1921 | |
| 1922 | static void handle_bus_resume(struct mv_udc *udc) |
| 1923 | { |
| 1924 | udc->usb_state = udc->resume_state; |
| 1925 | udc->resume_state = 0; |
| 1926 | |
| 1927 | /* report resume to the driver */ |
| 1928 | if (udc->driver) { |
| 1929 | if (udc->driver->resume) { |
| 1930 | spin_unlock(&udc->lock); |
| 1931 | udc->driver->resume(&udc->gadget); |
| 1932 | spin_lock(&udc->lock); |
| 1933 | } |
| 1934 | } |
| 1935 | } |
| 1936 | |
| 1937 | static void irq_process_suspend(struct mv_udc *udc) |
| 1938 | { |
| 1939 | udc->resume_state = udc->usb_state; |
| 1940 | udc->usb_state = USB_STATE_SUSPENDED; |
| 1941 | |
| 1942 | if (udc->driver->suspend) { |
| 1943 | spin_unlock(&udc->lock); |
| 1944 | udc->driver->suspend(&udc->gadget); |
| 1945 | spin_lock(&udc->lock); |
| 1946 | } |
| 1947 | } |
| 1948 | |
| 1949 | static void irq_process_port_change(struct mv_udc *udc) |
| 1950 | { |
| 1951 | u32 portsc; |
| 1952 | |
| 1953 | portsc = readl(&udc->op_regs->portsc[0]); |
| 1954 | if (!(portsc & PORTSCX_PORT_RESET)) { |
| 1955 | /* Get the speed */ |
| 1956 | u32 speed = portsc & PORTSCX_PORT_SPEED_MASK; |
| 1957 | switch (speed) { |
| 1958 | case PORTSCX_PORT_SPEED_HIGH: |
| 1959 | udc->gadget.speed = USB_SPEED_HIGH; |
| 1960 | break; |
| 1961 | case PORTSCX_PORT_SPEED_FULL: |
| 1962 | udc->gadget.speed = USB_SPEED_FULL; |
| 1963 | break; |
| 1964 | case PORTSCX_PORT_SPEED_LOW: |
| 1965 | udc->gadget.speed = USB_SPEED_LOW; |
| 1966 | break; |
| 1967 | default: |
| 1968 | udc->gadget.speed = USB_SPEED_UNKNOWN; |
| 1969 | break; |
| 1970 | } |
| 1971 | } |
| 1972 | |
| 1973 | if (portsc & PORTSCX_PORT_SUSPEND) { |
| 1974 | udc->resume_state = udc->usb_state; |
| 1975 | udc->usb_state = USB_STATE_SUSPENDED; |
| 1976 | if (udc->driver->suspend) { |
| 1977 | spin_unlock(&udc->lock); |
| 1978 | udc->driver->suspend(&udc->gadget); |
| 1979 | spin_lock(&udc->lock); |
| 1980 | } |
| 1981 | } |
| 1982 | |
| 1983 | if (!(portsc & PORTSCX_PORT_SUSPEND) |
| 1984 | && udc->usb_state == USB_STATE_SUSPENDED) { |
| 1985 | handle_bus_resume(udc); |
| 1986 | } |
| 1987 | |
| 1988 | if (!udc->resume_state) |
| 1989 | udc->usb_state = USB_STATE_DEFAULT; |
| 1990 | } |
| 1991 | |
| 1992 | static void irq_process_error(struct mv_udc *udc) |
| 1993 | { |
| 1994 | /* Increment the error count */ |
| 1995 | udc->errors++; |
| 1996 | } |
| 1997 | |
| 1998 | static irqreturn_t mv_udc_irq(int irq, void *dev) |
| 1999 | { |
| 2000 | struct mv_udc *udc = (struct mv_udc *)dev; |
| 2001 | u32 status, intr; |
| 2002 | |
| 2003 | /* Disable ISR when stopped bit is set */ |
| 2004 | if (udc->stopped) |
| 2005 | return IRQ_NONE; |
| 2006 | |
| 2007 | spin_lock(&udc->lock); |
| 2008 | |
| 2009 | status = readl(&udc->op_regs->usbsts); |
| 2010 | intr = readl(&udc->op_regs->usbintr); |
| 2011 | status &= intr; |
| 2012 | |
| 2013 | if (status == 0) { |
| 2014 | spin_unlock(&udc->lock); |
| 2015 | return IRQ_NONE; |
| 2016 | } |
| 2017 | |
| 2018 | /* Clear all the interrupts occurred */ |
| 2019 | writel(status, &udc->op_regs->usbsts); |
| 2020 | |
| 2021 | if (status & USBSTS_ERR) |
| 2022 | irq_process_error(udc); |
| 2023 | |
| 2024 | if (status & USBSTS_RESET) |
| 2025 | irq_process_reset(udc); |
| 2026 | |
| 2027 | if (status & USBSTS_PORT_CHANGE) |
| 2028 | irq_process_port_change(udc); |
| 2029 | |
| 2030 | if (status & USBSTS_INT) |
| 2031 | irq_process_tr_complete(udc); |
| 2032 | |
| 2033 | if (status & USBSTS_SUSPEND) |
| 2034 | irq_process_suspend(udc); |
| 2035 | |
| 2036 | spin_unlock(&udc->lock); |
| 2037 | |
| 2038 | return IRQ_HANDLED; |
| 2039 | } |
| 2040 | |
| 2041 | static irqreturn_t mv_udc_vbus_irq(int irq, void *dev) |
| 2042 | { |
| 2043 | struct mv_udc *udc = (struct mv_udc *)dev; |
| 2044 | |
| 2045 | /* polling VBUS and init phy may cause too much time*/ |
| 2046 | if (udc->qwork) |
| 2047 | queue_work(udc->qwork, &udc->vbus_work); |
| 2048 | |
| 2049 | return IRQ_HANDLED; |
| 2050 | } |
| 2051 | |
| 2052 | static void mv_udc_vbus_work(struct work_struct *work) |
| 2053 | { |
| 2054 | struct mv_udc *udc; |
| 2055 | unsigned int vbus; |
| 2056 | |
| 2057 | udc = container_of(work, struct mv_udc, vbus_work); |
| 2058 | if (!udc->pdata->vbus) |
| 2059 | return; |
| 2060 | |
| 2061 | vbus = udc->pdata->vbus->poll(); |
| 2062 | dev_info(&udc->dev->dev, "vbus is %d\n", vbus); |
| 2063 | |
| 2064 | if (vbus == VBUS_HIGH) |
| 2065 | mv_udc_vbus_session(&udc->gadget, 1); |
| 2066 | else if (vbus == VBUS_LOW) |
| 2067 | mv_udc_vbus_session(&udc->gadget, 0); |
| 2068 | } |
| 2069 | |
| 2070 | /* release device structure */ |
| 2071 | static void gadget_release(struct device *_dev) |
| 2072 | { |
| 2073 | struct mv_udc *udc; |
| 2074 | |
| 2075 | udc = dev_get_drvdata(_dev); |
| 2076 | |
| 2077 | complete(udc->done); |
| 2078 | } |
| 2079 | |
| 2080 | static void mv_udc_remove(struct platform_device *pdev) |
| 2081 | { |
| 2082 | struct mv_udc *udc; |
| 2083 | |
| 2084 | udc = platform_get_drvdata(pdev); |
| 2085 | |
| 2086 | usb_del_gadget_udc(&udc->gadget); |
| 2087 | |
| 2088 | if (udc->qwork) |
| 2089 | destroy_workqueue(udc->qwork); |
| 2090 | |
| 2091 | /* free memory allocated in probe */ |
| 2092 | dma_pool_destroy(udc->dtd_pool); |
| 2093 | |
| 2094 | if (udc->ep_dqh) |
| 2095 | dma_free_coherent(&pdev->dev, udc->ep_dqh_size, |
| 2096 | udc->ep_dqh, udc->ep_dqh_dma); |
| 2097 | |
| 2098 | mv_udc_disable(udc); |
| 2099 | |
| 2100 | /* free dev, wait for the release() finished */ |
| 2101 | wait_for_completion(udc->done); |
| 2102 | } |
| 2103 | |
| 2104 | static int mv_udc_probe(struct platform_device *pdev) |
| 2105 | { |
| 2106 | struct mv_usb_platform_data *pdata = dev_get_platdata(&pdev->dev); |
| 2107 | struct mv_udc *udc; |
| 2108 | int retval = 0; |
| 2109 | struct resource *r; |
| 2110 | size_t size; |
| 2111 | |
| 2112 | if (pdata == NULL) { |
| 2113 | dev_err(&pdev->dev, "missing platform_data\n"); |
| 2114 | return -ENODEV; |
| 2115 | } |
| 2116 | |
| 2117 | udc = devm_kzalloc(&pdev->dev, sizeof(*udc), GFP_KERNEL); |
| 2118 | if (udc == NULL) |
| 2119 | return -ENOMEM; |
| 2120 | |
| 2121 | udc->done = &release_done; |
| 2122 | udc->pdata = dev_get_platdata(&pdev->dev); |
| 2123 | spin_lock_init(&udc->lock); |
| 2124 | |
| 2125 | udc->dev = pdev; |
| 2126 | |
| 2127 | if (pdata->mode == MV_USB_MODE_OTG) { |
| 2128 | udc->transceiver = devm_usb_get_phy(&pdev->dev, |
| 2129 | USB_PHY_TYPE_USB2); |
| 2130 | if (IS_ERR(udc->transceiver)) { |
| 2131 | retval = PTR_ERR(udc->transceiver); |
| 2132 | |
| 2133 | if (retval == -ENXIO) |
| 2134 | return retval; |
| 2135 | |
| 2136 | udc->transceiver = NULL; |
| 2137 | return -EPROBE_DEFER; |
| 2138 | } |
| 2139 | } |
| 2140 | |
| 2141 | /* udc only have one sysclk. */ |
| 2142 | udc->clk = devm_clk_get(&pdev->dev, NULL); |
| 2143 | if (IS_ERR(udc->clk)) |
| 2144 | return PTR_ERR(udc->clk); |
| 2145 | |
| 2146 | r = platform_get_resource_byname(udc->dev, IORESOURCE_MEM, "capregs"); |
| 2147 | if (r == NULL) { |
| 2148 | dev_err(&pdev->dev, "no I/O memory resource defined\n"); |
| 2149 | return -ENODEV; |
| 2150 | } |
| 2151 | |
| 2152 | udc->cap_regs = (struct mv_cap_regs __iomem *) |
| 2153 | devm_ioremap(&pdev->dev, r->start, resource_size(r)); |
| 2154 | if (udc->cap_regs == NULL) { |
| 2155 | dev_err(&pdev->dev, "failed to map I/O memory\n"); |
| 2156 | return -EBUSY; |
| 2157 | } |
| 2158 | |
| 2159 | r = platform_get_resource_byname(udc->dev, IORESOURCE_MEM, "phyregs"); |
| 2160 | if (r == NULL) { |
| 2161 | dev_err(&pdev->dev, "no phy I/O memory resource defined\n"); |
| 2162 | return -ENODEV; |
| 2163 | } |
| 2164 | |
| 2165 | udc->phy_regs = devm_ioremap(&pdev->dev, r->start, resource_size(r)); |
| 2166 | if (udc->phy_regs == NULL) { |
| 2167 | dev_err(&pdev->dev, "failed to map phy I/O memory\n"); |
| 2168 | return -EBUSY; |
| 2169 | } |
| 2170 | |
| 2171 | /* we will acces controller register, so enable the clk */ |
| 2172 | retval = mv_udc_enable_internal(udc); |
| 2173 | if (retval) |
| 2174 | return retval; |
| 2175 | |
| 2176 | udc->op_regs = |
| 2177 | (struct mv_op_regs __iomem *)((unsigned long)udc->cap_regs |
| 2178 | + (readl(&udc->cap_regs->caplength_hciversion) |
| 2179 | & CAPLENGTH_MASK)); |
| 2180 | udc->max_eps = readl(&udc->cap_regs->dccparams) & DCCPARAMS_DEN_MASK; |
| 2181 | |
| 2182 | /* |
| 2183 | * some platform will use usb to download image, it may not disconnect |
| 2184 | * usb gadget before loading kernel. So first stop udc here. |
| 2185 | */ |
| 2186 | udc_stop(udc); |
| 2187 | writel(0xFFFFFFFF, &udc->op_regs->usbsts); |
| 2188 | |
| 2189 | size = udc->max_eps * sizeof(struct mv_dqh) *2; |
| 2190 | size = (size + DQH_ALIGNMENT - 1) & ~(DQH_ALIGNMENT - 1); |
| 2191 | udc->ep_dqh = dma_alloc_coherent(&pdev->dev, size, |
| 2192 | &udc->ep_dqh_dma, GFP_KERNEL); |
| 2193 | |
| 2194 | if (udc->ep_dqh == NULL) { |
| 2195 | dev_err(&pdev->dev, "allocate dQH memory failed\n"); |
| 2196 | retval = -ENOMEM; |
| 2197 | goto err_disable_clock; |
| 2198 | } |
| 2199 | udc->ep_dqh_size = size; |
| 2200 | |
| 2201 | /* create dTD dma_pool resource */ |
| 2202 | udc->dtd_pool = dma_pool_create("mv_dtd", |
| 2203 | &pdev->dev, |
| 2204 | sizeof(struct mv_dtd), |
| 2205 | DTD_ALIGNMENT, |
| 2206 | DMA_BOUNDARY); |
| 2207 | |
| 2208 | if (!udc->dtd_pool) { |
| 2209 | retval = -ENOMEM; |
| 2210 | goto err_free_dma; |
| 2211 | } |
| 2212 | |
| 2213 | size = udc->max_eps * sizeof(struct mv_ep) *2; |
| 2214 | udc->eps = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); |
| 2215 | if (udc->eps == NULL) { |
| 2216 | retval = -ENOMEM; |
| 2217 | goto err_destroy_dma; |
| 2218 | } |
| 2219 | |
| 2220 | /* initialize ep0 status request structure */ |
| 2221 | udc->status_req = devm_kzalloc(&pdev->dev, sizeof(struct mv_req), |
| 2222 | GFP_KERNEL); |
| 2223 | if (!udc->status_req) { |
| 2224 | retval = -ENOMEM; |
| 2225 | goto err_destroy_dma; |
| 2226 | } |
| 2227 | INIT_LIST_HEAD(&udc->status_req->queue); |
| 2228 | |
| 2229 | /* allocate a small amount of memory to get valid address */ |
| 2230 | udc->status_req->req.buf = devm_kzalloc(&pdev->dev, 8, GFP_KERNEL); |
| 2231 | if (!udc->status_req->req.buf) { |
| 2232 | retval = -ENOMEM; |
| 2233 | goto err_destroy_dma; |
| 2234 | } |
| 2235 | udc->status_req->req.dma = DMA_ADDR_INVALID; |
| 2236 | |
| 2237 | udc->resume_state = USB_STATE_NOTATTACHED; |
| 2238 | udc->usb_state = USB_STATE_POWERED; |
| 2239 | udc->ep0_dir = EP_DIR_OUT; |
| 2240 | udc->remote_wakeup = 0; |
| 2241 | |
| 2242 | r = platform_get_resource(udc->dev, IORESOURCE_IRQ, 0); |
| 2243 | if (r == NULL) { |
| 2244 | dev_err(&pdev->dev, "no IRQ resource defined\n"); |
| 2245 | retval = -ENODEV; |
| 2246 | goto err_destroy_dma; |
| 2247 | } |
| 2248 | udc->irq = r->start; |
| 2249 | if (devm_request_irq(&pdev->dev, udc->irq, mv_udc_irq, |
| 2250 | IRQF_SHARED, driver_name, udc)) { |
| 2251 | dev_err(&pdev->dev, "Request irq %d for UDC failed\n", |
| 2252 | udc->irq); |
| 2253 | retval = -ENODEV; |
| 2254 | goto err_destroy_dma; |
| 2255 | } |
| 2256 | |
| 2257 | /* initialize gadget structure */ |
| 2258 | udc->gadget.ops = &mv_ops; /* usb_gadget_ops */ |
| 2259 | udc->gadget.ep0 = &udc->eps[0].ep; /* gadget ep0 */ |
| 2260 | INIT_LIST_HEAD(&udc->gadget.ep_list); /* ep_list */ |
| 2261 | udc->gadget.speed = USB_SPEED_UNKNOWN; /* speed */ |
| 2262 | udc->gadget.max_speed = USB_SPEED_HIGH; /* support dual speed */ |
| 2263 | |
| 2264 | /* the "gadget" abstracts/virtualizes the controller */ |
| 2265 | udc->gadget.name = driver_name; /* gadget name */ |
| 2266 | |
| 2267 | eps_init(udc); |
| 2268 | |
| 2269 | /* VBUS detect: we can disable/enable clock on demand.*/ |
| 2270 | if (udc->transceiver) |
| 2271 | udc->clock_gating = 1; |
| 2272 | else if (pdata->vbus) { |
| 2273 | udc->clock_gating = 1; |
| 2274 | retval = devm_request_threaded_irq(&pdev->dev, |
| 2275 | pdata->vbus->irq, NULL, |
| 2276 | mv_udc_vbus_irq, IRQF_ONESHOT, "vbus", udc); |
| 2277 | if (retval) { |
| 2278 | dev_info(&pdev->dev, |
| 2279 | "Can not request irq for VBUS, " |
| 2280 | "disable clock gating\n"); |
| 2281 | udc->clock_gating = 0; |
| 2282 | } |
| 2283 | |
| 2284 | udc->qwork = create_singlethread_workqueue("mv_udc_queue"); |
| 2285 | if (!udc->qwork) { |
| 2286 | dev_err(&pdev->dev, "cannot create workqueue\n"); |
| 2287 | retval = -ENOMEM; |
| 2288 | goto err_destroy_dma; |
| 2289 | } |
| 2290 | |
| 2291 | INIT_WORK(&udc->vbus_work, mv_udc_vbus_work); |
| 2292 | } |
| 2293 | |
| 2294 | /* |
| 2295 | * When clock gating is supported, we can disable clk and phy. |
| 2296 | * If not, it means that VBUS detection is not supported, we |
| 2297 | * have to enable vbus active all the time to let controller work. |
| 2298 | */ |
| 2299 | if (udc->clock_gating) |
| 2300 | mv_udc_disable_internal(udc); |
| 2301 | else |
| 2302 | udc->vbus_active = 1; |
| 2303 | |
| 2304 | retval = usb_add_gadget_udc_release(&pdev->dev, &udc->gadget, |
| 2305 | gadget_release); |
| 2306 | if (retval) |
| 2307 | goto err_create_workqueue; |
| 2308 | |
| 2309 | platform_set_drvdata(pdev, udc); |
| 2310 | dev_info(&pdev->dev, "successful probe UDC device %s clock gating.\n", |
| 2311 | udc->clock_gating ? "with" : "without"); |
| 2312 | |
| 2313 | return 0; |
| 2314 | |
| 2315 | err_create_workqueue: |
| 2316 | if (udc->qwork) |
| 2317 | destroy_workqueue(udc->qwork); |
| 2318 | err_destroy_dma: |
| 2319 | dma_pool_destroy(udc->dtd_pool); |
| 2320 | err_free_dma: |
| 2321 | dma_free_coherent(&pdev->dev, udc->ep_dqh_size, |
| 2322 | udc->ep_dqh, udc->ep_dqh_dma); |
| 2323 | err_disable_clock: |
| 2324 | mv_udc_disable_internal(udc); |
| 2325 | |
| 2326 | return retval; |
| 2327 | } |
| 2328 | |
| 2329 | #ifdef CONFIG_PM |
| 2330 | static int mv_udc_suspend(struct device *dev) |
| 2331 | { |
| 2332 | struct mv_udc *udc; |
| 2333 | |
| 2334 | udc = dev_get_drvdata(dev); |
| 2335 | |
| 2336 | /* if OTG is enabled, the following will be done in OTG driver*/ |
| 2337 | if (udc->transceiver) |
| 2338 | return 0; |
| 2339 | |
| 2340 | if (udc->pdata->vbus && udc->pdata->vbus->poll) |
| 2341 | if (udc->pdata->vbus->poll() == VBUS_HIGH) { |
| 2342 | dev_info(&udc->dev->dev, "USB cable is connected!\n"); |
| 2343 | return -EAGAIN; |
| 2344 | } |
| 2345 | |
| 2346 | /* |
| 2347 | * only cable is unplugged, udc can suspend. |
| 2348 | * So do not care about clock_gating == 1. |
| 2349 | */ |
| 2350 | if (!udc->clock_gating) { |
| 2351 | udc_stop(udc); |
| 2352 | |
| 2353 | spin_lock_irq(&udc->lock); |
| 2354 | /* stop all usb activities */ |
| 2355 | stop_activity(udc, udc->driver); |
| 2356 | spin_unlock_irq(&udc->lock); |
| 2357 | |
| 2358 | mv_udc_disable_internal(udc); |
| 2359 | } |
| 2360 | |
| 2361 | return 0; |
| 2362 | } |
| 2363 | |
| 2364 | static int mv_udc_resume(struct device *dev) |
| 2365 | { |
| 2366 | struct mv_udc *udc; |
| 2367 | int retval; |
| 2368 | |
| 2369 | udc = dev_get_drvdata(dev); |
| 2370 | |
| 2371 | /* if OTG is enabled, the following will be done in OTG driver*/ |
| 2372 | if (udc->transceiver) |
| 2373 | return 0; |
| 2374 | |
| 2375 | if (!udc->clock_gating) { |
| 2376 | retval = mv_udc_enable_internal(udc); |
| 2377 | if (retval) |
| 2378 | return retval; |
| 2379 | |
| 2380 | if (udc->driver && udc->softconnect) { |
| 2381 | udc_reset(udc); |
| 2382 | ep0_reset(udc); |
| 2383 | udc_start(udc); |
| 2384 | } |
| 2385 | } |
| 2386 | |
| 2387 | return 0; |
| 2388 | } |
| 2389 | |
| 2390 | static const struct dev_pm_ops mv_udc_pm_ops = { |
| 2391 | .suspend = mv_udc_suspend, |
| 2392 | .resume = mv_udc_resume, |
| 2393 | }; |
| 2394 | #endif |
| 2395 | |
| 2396 | static void mv_udc_shutdown(struct platform_device *pdev) |
| 2397 | { |
| 2398 | struct mv_udc *udc; |
| 2399 | u32 mode; |
| 2400 | |
| 2401 | udc = platform_get_drvdata(pdev); |
| 2402 | /* reset controller mode to IDLE */ |
| 2403 | mv_udc_enable(udc); |
| 2404 | mode = readl(&udc->op_regs->usbmode); |
| 2405 | mode &= ~3; |
| 2406 | writel(mode, &udc->op_regs->usbmode); |
| 2407 | mv_udc_disable(udc); |
| 2408 | } |
| 2409 | |
| 2410 | static struct platform_driver udc_driver = { |
| 2411 | .probe = mv_udc_probe, |
| 2412 | .remove_new = mv_udc_remove, |
| 2413 | .shutdown = mv_udc_shutdown, |
| 2414 | .driver = { |
| 2415 | .name = "mv-udc", |
| 2416 | #ifdef CONFIG_PM |
| 2417 | .pm = &mv_udc_pm_ops, |
| 2418 | #endif |
| 2419 | }, |
| 2420 | }; |
| 2421 | |
| 2422 | module_platform_driver(udc_driver); |
| 2423 | MODULE_ALIAS("platform:mv-udc"); |
| 2424 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 2425 | MODULE_AUTHOR("Chao Xie <chao.xie@marvell.com>"); |
| 2426 | MODULE_LICENSE("GPL"); |