Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 Marvell International Ltd. All rights reserved. |
| 3 | * Author: Chao Xie <chao.xie@marvell.com> |
| 4 | * Neil Zhang <zhangwm@marvell.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation; either version 2 of the License, or (at your |
| 9 | * option) any later version. |
| 10 | */ |
| 11 | |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 12 | #include <linux/module.h> |
| 13 | #include <linux/pci.h> |
| 14 | #include <linux/dma-mapping.h> |
| 15 | #include <linux/dmapool.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/delay.h> |
| 18 | #include <linux/ioport.h> |
| 19 | #include <linux/sched.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/timer.h> |
| 24 | #include <linux/list.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/moduleparam.h> |
| 27 | #include <linux/device.h> |
| 28 | #include <linux/usb/ch9.h> |
| 29 | #include <linux/usb/gadget.h> |
| 30 | #include <linux/usb/otg.h> |
| 31 | #include <linux/pm.h> |
| 32 | #include <linux/io.h> |
| 33 | #include <linux/irq.h> |
| 34 | #include <linux/platform_device.h> |
| 35 | #include <linux/clk.h> |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 36 | #include <linux/platform_data/mv_usb.h> |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 37 | #include <asm/system.h> |
| 38 | #include <asm/unaligned.h> |
| 39 | |
| 40 | #include "mv_udc.h" |
| 41 | |
| 42 | #define DRIVER_DESC "Marvell PXA USB Device Controller driver" |
| 43 | #define DRIVER_VERSION "8 Nov 2010" |
| 44 | |
| 45 | #define ep_dir(ep) (((ep)->ep_num == 0) ? \ |
| 46 | ((ep)->udc->ep0_dir) : ((ep)->direction)) |
| 47 | |
| 48 | /* timeout value -- usec */ |
| 49 | #define RESET_TIMEOUT 10000 |
| 50 | #define FLUSH_TIMEOUT 10000 |
| 51 | #define EPSTATUS_TIMEOUT 10000 |
| 52 | #define PRIME_TIMEOUT 10000 |
| 53 | #define READSAFE_TIMEOUT 1000 |
| 54 | #define DTD_TIMEOUT 1000 |
| 55 | |
| 56 | #define LOOPS_USEC_SHIFT 4 |
| 57 | #define LOOPS_USEC (1 << LOOPS_USEC_SHIFT) |
| 58 | #define LOOPS(timeout) ((timeout) >> LOOPS_USEC_SHIFT) |
| 59 | |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 60 | static DECLARE_COMPLETION(release_done); |
| 61 | |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 62 | static const char driver_name[] = "mv_udc"; |
| 63 | static const char driver_desc[] = DRIVER_DESC; |
| 64 | |
| 65 | /* controller device global variable */ |
| 66 | static struct mv_udc *the_controller; |
| 67 | int mv_usb_otgsc; |
| 68 | |
| 69 | static void nuke(struct mv_ep *ep, int status); |
| 70 | |
| 71 | /* for endpoint 0 operations */ |
| 72 | static const struct usb_endpoint_descriptor mv_ep0_desc = { |
| 73 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 74 | .bDescriptorType = USB_DT_ENDPOINT, |
| 75 | .bEndpointAddress = 0, |
| 76 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, |
| 77 | .wMaxPacketSize = EP0_MAX_PKT_SIZE, |
| 78 | }; |
| 79 | |
| 80 | static void ep0_reset(struct mv_udc *udc) |
| 81 | { |
| 82 | struct mv_ep *ep; |
| 83 | u32 epctrlx; |
| 84 | int i = 0; |
| 85 | |
| 86 | /* ep0 in and out */ |
| 87 | for (i = 0; i < 2; i++) { |
| 88 | ep = &udc->eps[i]; |
| 89 | ep->udc = udc; |
| 90 | |
| 91 | /* ep0 dQH */ |
| 92 | ep->dqh = &udc->ep_dqh[i]; |
| 93 | |
| 94 | /* configure ep0 endpoint capabilities in dQH */ |
| 95 | ep->dqh->max_packet_length = |
| 96 | (EP0_MAX_PKT_SIZE << EP_QUEUE_HEAD_MAX_PKT_LEN_POS) |
| 97 | | EP_QUEUE_HEAD_IOS; |
| 98 | |
Neil Zhang | fbebe1f | 2011-10-12 16:49:29 +0800 | [diff] [blame] | 99 | ep->dqh->next_dtd_ptr = EP_QUEUE_HEAD_NEXT_TERMINATE; |
| 100 | |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 101 | epctrlx = readl(&udc->op_regs->epctrlx[0]); |
| 102 | if (i) { /* TX */ |
Neil Zhang | 43ad9f3 | 2011-10-12 16:49:28 +0800 | [diff] [blame] | 103 | epctrlx |= EPCTRL_TX_ENABLE |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 104 | | (USB_ENDPOINT_XFER_CONTROL |
| 105 | << EPCTRL_TX_EP_TYPE_SHIFT); |
| 106 | |
| 107 | } else { /* RX */ |
Neil Zhang | 43ad9f3 | 2011-10-12 16:49:28 +0800 | [diff] [blame] | 108 | epctrlx |= EPCTRL_RX_ENABLE |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 109 | | (USB_ENDPOINT_XFER_CONTROL |
| 110 | << EPCTRL_RX_EP_TYPE_SHIFT); |
| 111 | } |
| 112 | |
| 113 | writel(epctrlx, &udc->op_regs->epctrlx[0]); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | /* protocol ep0 stall, will automatically be cleared on new transaction */ |
| 118 | static void ep0_stall(struct mv_udc *udc) |
| 119 | { |
| 120 | u32 epctrlx; |
| 121 | |
| 122 | /* set TX and RX to stall */ |
| 123 | epctrlx = readl(&udc->op_regs->epctrlx[0]); |
| 124 | epctrlx |= EPCTRL_RX_EP_STALL | EPCTRL_TX_EP_STALL; |
| 125 | writel(epctrlx, &udc->op_regs->epctrlx[0]); |
| 126 | |
| 127 | /* update ep0 state */ |
| 128 | udc->ep0_state = WAIT_FOR_SETUP; |
| 129 | udc->ep0_dir = EP_DIR_OUT; |
| 130 | } |
| 131 | |
| 132 | static int process_ep_req(struct mv_udc *udc, int index, |
| 133 | struct mv_req *curr_req) |
| 134 | { |
| 135 | struct mv_dtd *curr_dtd; |
| 136 | struct mv_dqh *curr_dqh; |
| 137 | int td_complete, actual, remaining_length; |
| 138 | int i, direction; |
| 139 | int retval = 0; |
| 140 | u32 errors; |
| 141 | |
| 142 | curr_dqh = &udc->ep_dqh[index]; |
| 143 | direction = index % 2; |
| 144 | |
| 145 | curr_dtd = curr_req->head; |
| 146 | td_complete = 0; |
| 147 | actual = curr_req->req.length; |
| 148 | |
| 149 | for (i = 0; i < curr_req->dtd_count; i++) { |
| 150 | if (curr_dtd->size_ioc_sts & DTD_STATUS_ACTIVE) { |
| 151 | dev_dbg(&udc->dev->dev, "%s, dTD not completed\n", |
| 152 | udc->eps[index].name); |
| 153 | return 1; |
| 154 | } |
| 155 | |
| 156 | errors = curr_dtd->size_ioc_sts & DTD_ERROR_MASK; |
| 157 | if (!errors) { |
| 158 | remaining_length += |
| 159 | (curr_dtd->size_ioc_sts & DTD_PACKET_SIZE) |
| 160 | >> DTD_LENGTH_BIT_POS; |
| 161 | actual -= remaining_length; |
| 162 | } else { |
| 163 | dev_info(&udc->dev->dev, |
| 164 | "complete_tr error: ep=%d %s: error = 0x%x\n", |
| 165 | index >> 1, direction ? "SEND" : "RECV", |
| 166 | errors); |
| 167 | if (errors & DTD_STATUS_HALTED) { |
| 168 | /* Clear the errors and Halt condition */ |
| 169 | curr_dqh->size_ioc_int_sts &= ~errors; |
| 170 | retval = -EPIPE; |
| 171 | } else if (errors & DTD_STATUS_DATA_BUFF_ERR) { |
| 172 | retval = -EPROTO; |
| 173 | } else if (errors & DTD_STATUS_TRANSACTION_ERR) { |
| 174 | retval = -EILSEQ; |
| 175 | } |
| 176 | } |
| 177 | if (i != curr_req->dtd_count - 1) |
| 178 | curr_dtd = (struct mv_dtd *)curr_dtd->next_dtd_virt; |
| 179 | } |
| 180 | if (retval) |
| 181 | return retval; |
| 182 | |
| 183 | curr_req->req.actual = actual; |
| 184 | |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | /* |
| 189 | * done() - retire a request; caller blocked irqs |
| 190 | * @status : request status to be set, only works when |
| 191 | * request is still in progress. |
| 192 | */ |
| 193 | static void done(struct mv_ep *ep, struct mv_req *req, int status) |
| 194 | { |
| 195 | struct mv_udc *udc = NULL; |
| 196 | unsigned char stopped = ep->stopped; |
| 197 | struct mv_dtd *curr_td, *next_td; |
| 198 | int j; |
| 199 | |
| 200 | udc = (struct mv_udc *)ep->udc; |
| 201 | /* Removed the req from fsl_ep->queue */ |
| 202 | list_del_init(&req->queue); |
| 203 | |
| 204 | /* req.status should be set as -EINPROGRESS in ep_queue() */ |
| 205 | if (req->req.status == -EINPROGRESS) |
| 206 | req->req.status = status; |
| 207 | else |
| 208 | status = req->req.status; |
| 209 | |
| 210 | /* Free dtd for the request */ |
| 211 | next_td = req->head; |
| 212 | for (j = 0; j < req->dtd_count; j++) { |
| 213 | curr_td = next_td; |
| 214 | if (j != req->dtd_count - 1) |
| 215 | next_td = curr_td->next_dtd_virt; |
| 216 | dma_pool_free(udc->dtd_pool, curr_td, curr_td->td_dma); |
| 217 | } |
| 218 | |
| 219 | if (req->mapped) { |
| 220 | dma_unmap_single(ep->udc->gadget.dev.parent, |
| 221 | req->req.dma, req->req.length, |
| 222 | ((ep_dir(ep) == EP_DIR_IN) ? |
| 223 | DMA_TO_DEVICE : DMA_FROM_DEVICE)); |
| 224 | req->req.dma = DMA_ADDR_INVALID; |
| 225 | req->mapped = 0; |
| 226 | } else |
| 227 | dma_sync_single_for_cpu(ep->udc->gadget.dev.parent, |
| 228 | req->req.dma, req->req.length, |
| 229 | ((ep_dir(ep) == EP_DIR_IN) ? |
| 230 | DMA_TO_DEVICE : DMA_FROM_DEVICE)); |
| 231 | |
| 232 | if (status && (status != -ESHUTDOWN)) |
| 233 | dev_info(&udc->dev->dev, "complete %s req %p stat %d len %u/%u", |
| 234 | ep->ep.name, &req->req, status, |
| 235 | req->req.actual, req->req.length); |
| 236 | |
| 237 | ep->stopped = 1; |
| 238 | |
| 239 | spin_unlock(&ep->udc->lock); |
| 240 | /* |
| 241 | * complete() is from gadget layer, |
| 242 | * eg fsg->bulk_in_complete() |
| 243 | */ |
| 244 | if (req->req.complete) |
| 245 | req->req.complete(&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 | u32 tmp, epstatus, bit_pos, direction; |
| 254 | struct mv_udc *udc; |
| 255 | struct mv_dqh *dqh; |
| 256 | unsigned int loops; |
| 257 | int readsafe, retval = 0; |
| 258 | |
| 259 | udc = ep->udc; |
| 260 | direction = ep_dir(ep); |
| 261 | dqh = &(udc->ep_dqh[ep->ep_num * 2 + direction]); |
| 262 | bit_pos = 1 << (((direction == EP_DIR_OUT) ? 0 : 16) + ep->ep_num); |
| 263 | |
| 264 | /* check if the pipe is empty */ |
| 265 | if (!(list_empty(&ep->queue))) { |
| 266 | struct mv_req *lastreq; |
| 267 | lastreq = list_entry(ep->queue.prev, struct mv_req, queue); |
| 268 | lastreq->tail->dtd_next = |
| 269 | req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK; |
| 270 | if (readl(&udc->op_regs->epprime) & bit_pos) { |
| 271 | loops = LOOPS(PRIME_TIMEOUT); |
| 272 | while (readl(&udc->op_regs->epprime) & bit_pos) { |
| 273 | if (loops == 0) { |
| 274 | retval = -ETIME; |
| 275 | goto done; |
| 276 | } |
| 277 | udelay(LOOPS_USEC); |
| 278 | loops--; |
| 279 | } |
| 280 | if (readl(&udc->op_regs->epstatus) & bit_pos) |
| 281 | goto done; |
| 282 | } |
| 283 | readsafe = 0; |
| 284 | loops = LOOPS(READSAFE_TIMEOUT); |
| 285 | while (readsafe == 0) { |
| 286 | if (loops == 0) { |
| 287 | retval = -ETIME; |
| 288 | goto done; |
| 289 | } |
| 290 | /* start with setting the semaphores */ |
| 291 | tmp = readl(&udc->op_regs->usbcmd); |
| 292 | tmp |= USBCMD_ATDTW_TRIPWIRE_SET; |
| 293 | writel(tmp, &udc->op_regs->usbcmd); |
| 294 | |
| 295 | /* read the endpoint status */ |
| 296 | epstatus = readl(&udc->op_regs->epstatus) & bit_pos; |
| 297 | |
| 298 | /* |
| 299 | * Reread the ATDTW semaphore bit to check if it is |
| 300 | * cleared. When hardware see a hazard, it will clear |
| 301 | * the bit or else we remain set to 1 and we can |
| 302 | * proceed with priming of endpoint if not already |
| 303 | * primed. |
| 304 | */ |
| 305 | if (readl(&udc->op_regs->usbcmd) |
| 306 | & USBCMD_ATDTW_TRIPWIRE_SET) { |
| 307 | readsafe = 1; |
| 308 | } |
| 309 | loops--; |
| 310 | udelay(LOOPS_USEC); |
| 311 | } |
| 312 | |
| 313 | /* Clear the semaphore */ |
| 314 | tmp = readl(&udc->op_regs->usbcmd); |
| 315 | tmp &= USBCMD_ATDTW_TRIPWIRE_CLEAR; |
| 316 | writel(tmp, &udc->op_regs->usbcmd); |
| 317 | |
| 318 | /* If endpoint is not active, we activate it now. */ |
| 319 | if (!epstatus) { |
| 320 | if (direction == EP_DIR_IN) { |
| 321 | struct mv_dtd *curr_dtd = dma_to_virt( |
| 322 | &udc->dev->dev, dqh->curr_dtd_ptr); |
| 323 | |
| 324 | loops = LOOPS(DTD_TIMEOUT); |
| 325 | while (curr_dtd->size_ioc_sts |
| 326 | & DTD_STATUS_ACTIVE) { |
| 327 | if (loops == 0) { |
| 328 | retval = -ETIME; |
| 329 | goto done; |
| 330 | } |
| 331 | loops--; |
| 332 | udelay(LOOPS_USEC); |
| 333 | } |
| 334 | } |
| 335 | /* No other transfers on the queue */ |
| 336 | |
| 337 | /* Write dQH next pointer and terminate bit to 0 */ |
| 338 | dqh->next_dtd_ptr = req->head->td_dma |
| 339 | & EP_QUEUE_HEAD_NEXT_POINTER_MASK; |
| 340 | dqh->size_ioc_int_sts = 0; |
| 341 | |
| 342 | /* |
| 343 | * Ensure that updates to the QH will |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 344 | * occur before priming. |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 345 | */ |
| 346 | wmb(); |
| 347 | |
| 348 | /* Prime the Endpoint */ |
| 349 | writel(bit_pos, &udc->op_regs->epprime); |
| 350 | } |
| 351 | } else { |
| 352 | /* Write dQH next pointer and terminate bit to 0 */ |
| 353 | dqh->next_dtd_ptr = req->head->td_dma |
| 354 | & EP_QUEUE_HEAD_NEXT_POINTER_MASK;; |
| 355 | dqh->size_ioc_int_sts = 0; |
| 356 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 357 | /* Ensure that updates to the QH will occur before priming. */ |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 358 | wmb(); |
| 359 | |
| 360 | /* Prime the Endpoint */ |
| 361 | writel(bit_pos, &udc->op_regs->epprime); |
| 362 | |
| 363 | if (direction == EP_DIR_IN) { |
| 364 | /* FIXME add status check after prime the IN ep */ |
| 365 | int prime_again; |
| 366 | u32 curr_dtd_ptr = dqh->curr_dtd_ptr; |
| 367 | |
| 368 | loops = LOOPS(DTD_TIMEOUT); |
| 369 | prime_again = 0; |
| 370 | while ((curr_dtd_ptr != req->head->td_dma)) { |
| 371 | curr_dtd_ptr = dqh->curr_dtd_ptr; |
| 372 | if (loops == 0) { |
| 373 | dev_err(&udc->dev->dev, |
| 374 | "failed to prime %s\n", |
| 375 | ep->name); |
| 376 | retval = -ETIME; |
| 377 | goto done; |
| 378 | } |
| 379 | loops--; |
| 380 | udelay(LOOPS_USEC); |
| 381 | |
| 382 | if (loops == (LOOPS(DTD_TIMEOUT) >> 2)) { |
| 383 | if (prime_again) |
| 384 | goto done; |
| 385 | dev_info(&udc->dev->dev, |
| 386 | "prime again\n"); |
| 387 | writel(bit_pos, |
| 388 | &udc->op_regs->epprime); |
| 389 | prime_again = 1; |
| 390 | } |
| 391 | } |
| 392 | } |
| 393 | } |
| 394 | done: |
| 395 | return retval;; |
| 396 | } |
| 397 | |
| 398 | static struct mv_dtd *build_dtd(struct mv_req *req, unsigned *length, |
| 399 | dma_addr_t *dma, int *is_last) |
| 400 | { |
| 401 | u32 temp; |
| 402 | struct mv_dtd *dtd; |
| 403 | struct mv_udc *udc; |
| 404 | |
| 405 | /* how big will this transfer be? */ |
| 406 | *length = min(req->req.length - req->req.actual, |
| 407 | (unsigned)EP_MAX_LENGTH_TRANSFER); |
| 408 | |
| 409 | udc = req->ep->udc; |
| 410 | |
| 411 | /* |
| 412 | * Be careful that no _GFP_HIGHMEM is set, |
| 413 | * or we can not use dma_to_virt |
| 414 | */ |
| 415 | dtd = dma_pool_alloc(udc->dtd_pool, GFP_KERNEL, dma); |
| 416 | if (dtd == NULL) |
| 417 | return dtd; |
| 418 | |
| 419 | dtd->td_dma = *dma; |
| 420 | /* initialize buffer page pointers */ |
| 421 | temp = (u32)(req->req.dma + req->req.actual); |
| 422 | dtd->buff_ptr0 = cpu_to_le32(temp); |
| 423 | temp &= ~0xFFF; |
| 424 | dtd->buff_ptr1 = cpu_to_le32(temp + 0x1000); |
| 425 | dtd->buff_ptr2 = cpu_to_le32(temp + 0x2000); |
| 426 | dtd->buff_ptr3 = cpu_to_le32(temp + 0x3000); |
| 427 | dtd->buff_ptr4 = cpu_to_le32(temp + 0x4000); |
| 428 | |
| 429 | req->req.actual += *length; |
| 430 | |
| 431 | /* zlp is needed if req->req.zero is set */ |
| 432 | if (req->req.zero) { |
| 433 | if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0) |
| 434 | *is_last = 1; |
| 435 | else |
| 436 | *is_last = 0; |
| 437 | } else if (req->req.length == req->req.actual) |
| 438 | *is_last = 1; |
| 439 | else |
| 440 | *is_last = 0; |
| 441 | |
| 442 | /* Fill in the transfer size; set active bit */ |
| 443 | temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE); |
| 444 | |
| 445 | /* Enable interrupt for the last dtd of a request */ |
| 446 | if (*is_last && !req->req.no_interrupt) |
| 447 | temp |= DTD_IOC; |
| 448 | |
| 449 | dtd->size_ioc_sts = temp; |
| 450 | |
| 451 | mb(); |
| 452 | |
| 453 | return dtd; |
| 454 | } |
| 455 | |
| 456 | /* generate dTD linked list for a request */ |
| 457 | static int req_to_dtd(struct mv_req *req) |
| 458 | { |
| 459 | unsigned count; |
| 460 | int is_last, is_first = 1; |
| 461 | struct mv_dtd *dtd, *last_dtd = NULL; |
| 462 | struct mv_udc *udc; |
| 463 | dma_addr_t dma; |
| 464 | |
| 465 | udc = req->ep->udc; |
| 466 | |
| 467 | do { |
| 468 | dtd = build_dtd(req, &count, &dma, &is_last); |
| 469 | if (dtd == NULL) |
| 470 | return -ENOMEM; |
| 471 | |
| 472 | if (is_first) { |
| 473 | is_first = 0; |
| 474 | req->head = dtd; |
| 475 | } else { |
| 476 | last_dtd->dtd_next = dma; |
| 477 | last_dtd->next_dtd_virt = dtd; |
| 478 | } |
| 479 | last_dtd = dtd; |
| 480 | req->dtd_count++; |
| 481 | } while (!is_last); |
| 482 | |
| 483 | /* set terminate bit to 1 for the last dTD */ |
| 484 | dtd->dtd_next = DTD_NEXT_TERMINATE; |
| 485 | |
| 486 | req->tail = dtd; |
| 487 | |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | static int mv_ep_enable(struct usb_ep *_ep, |
| 492 | const struct usb_endpoint_descriptor *desc) |
| 493 | { |
| 494 | struct mv_udc *udc; |
| 495 | struct mv_ep *ep; |
| 496 | struct mv_dqh *dqh; |
| 497 | u16 max = 0; |
| 498 | u32 bit_pos, epctrlx, direction; |
| 499 | unsigned char zlt = 0, ios = 0, mult = 0; |
Neil Zhang | 27cec2b | 2011-10-12 16:49:31 +0800 | [diff] [blame^] | 500 | unsigned long flags; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 501 | |
| 502 | ep = container_of(_ep, struct mv_ep, ep); |
| 503 | udc = ep->udc; |
| 504 | |
| 505 | if (!_ep || !desc || ep->desc |
| 506 | || desc->bDescriptorType != USB_DT_ENDPOINT) |
| 507 | return -EINVAL; |
| 508 | |
| 509 | if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) |
| 510 | return -ESHUTDOWN; |
| 511 | |
| 512 | direction = ep_dir(ep); |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 513 | max = usb_endpoint_maxp(desc); |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 514 | |
| 515 | /* |
| 516 | * disable HW zero length termination select |
| 517 | * driver handles zero length packet through req->req.zero |
| 518 | */ |
| 519 | zlt = 1; |
| 520 | |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 521 | bit_pos = 1 << ((direction == EP_DIR_OUT ? 0 : 16) + ep->ep_num); |
| 522 | |
| 523 | /* Check if the Endpoint is Primed */ |
| 524 | if ((readl(&udc->op_regs->epprime) & bit_pos) |
| 525 | || (readl(&udc->op_regs->epstatus) & bit_pos)) { |
| 526 | dev_info(&udc->dev->dev, |
| 527 | "ep=%d %s: Init ERROR: ENDPTPRIME=0x%x," |
| 528 | " ENDPTSTATUS=0x%x, bit_pos=0x%x\n", |
| 529 | (unsigned)ep->ep_num, direction ? "SEND" : "RECV", |
| 530 | (unsigned)readl(&udc->op_regs->epprime), |
| 531 | (unsigned)readl(&udc->op_regs->epstatus), |
| 532 | (unsigned)bit_pos); |
| 533 | goto en_done; |
| 534 | } |
| 535 | /* Set the max packet length, interrupt on Setup and Mult fields */ |
| 536 | switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { |
| 537 | case USB_ENDPOINT_XFER_BULK: |
| 538 | zlt = 1; |
| 539 | mult = 0; |
| 540 | break; |
| 541 | case USB_ENDPOINT_XFER_CONTROL: |
| 542 | ios = 1; |
| 543 | case USB_ENDPOINT_XFER_INT: |
| 544 | mult = 0; |
| 545 | break; |
| 546 | case USB_ENDPOINT_XFER_ISOC: |
| 547 | /* Calculate transactions needed for high bandwidth iso */ |
| 548 | mult = (unsigned char)(1 + ((max >> 11) & 0x03)); |
Neil Zhang | bedcff9 | 2011-10-12 16:49:27 +0800 | [diff] [blame] | 549 | max = max & 0x7ff; /* bit 0~10 */ |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 550 | /* 3 transactions at most */ |
| 551 | if (mult > 3) |
| 552 | goto en_done; |
| 553 | break; |
| 554 | default: |
| 555 | goto en_done; |
| 556 | } |
Neil Zhang | 27cec2b | 2011-10-12 16:49:31 +0800 | [diff] [blame^] | 557 | |
| 558 | spin_lock_irqsave(&udc->lock, flags); |
| 559 | /* Get the endpoint queue head address */ |
| 560 | dqh = ep->dqh; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 561 | dqh->max_packet_length = (max << EP_QUEUE_HEAD_MAX_PKT_LEN_POS) |
| 562 | | (mult << EP_QUEUE_HEAD_MULT_POS) |
| 563 | | (zlt ? EP_QUEUE_HEAD_ZLT_SEL : 0) |
| 564 | | (ios ? EP_QUEUE_HEAD_IOS : 0); |
| 565 | dqh->next_dtd_ptr = 1; |
| 566 | dqh->size_ioc_int_sts = 0; |
| 567 | |
| 568 | ep->ep.maxpacket = max; |
| 569 | ep->desc = desc; |
| 570 | ep->stopped = 0; |
| 571 | |
| 572 | /* Enable the endpoint for Rx or Tx and set the endpoint type */ |
| 573 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); |
| 574 | if (direction == EP_DIR_IN) { |
| 575 | epctrlx &= ~EPCTRL_TX_ALL_MASK; |
| 576 | epctrlx |= EPCTRL_TX_ENABLE | EPCTRL_TX_DATA_TOGGLE_RST |
| 577 | | ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) |
| 578 | << EPCTRL_TX_EP_TYPE_SHIFT); |
| 579 | } else { |
| 580 | epctrlx &= ~EPCTRL_RX_ALL_MASK; |
| 581 | epctrlx |= EPCTRL_RX_ENABLE | EPCTRL_RX_DATA_TOGGLE_RST |
| 582 | | ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) |
| 583 | << EPCTRL_RX_EP_TYPE_SHIFT); |
| 584 | } |
| 585 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); |
| 586 | |
| 587 | /* |
| 588 | * Implement Guideline (GL# USB-7) The unused endpoint type must |
| 589 | * be programmed to bulk. |
| 590 | */ |
| 591 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); |
| 592 | if ((epctrlx & EPCTRL_RX_ENABLE) == 0) { |
| 593 | epctrlx |= ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) |
| 594 | << EPCTRL_RX_EP_TYPE_SHIFT); |
| 595 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); |
| 596 | } |
| 597 | |
| 598 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); |
| 599 | if ((epctrlx & EPCTRL_TX_ENABLE) == 0) { |
| 600 | epctrlx |= ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) |
| 601 | << EPCTRL_TX_EP_TYPE_SHIFT); |
| 602 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); |
| 603 | } |
| 604 | |
Neil Zhang | 27cec2b | 2011-10-12 16:49:31 +0800 | [diff] [blame^] | 605 | spin_unlock_irqrestore(&udc->lock, flags); |
| 606 | |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 607 | return 0; |
| 608 | en_done: |
| 609 | return -EINVAL; |
| 610 | } |
| 611 | |
| 612 | static int mv_ep_disable(struct usb_ep *_ep) |
| 613 | { |
| 614 | struct mv_udc *udc; |
| 615 | struct mv_ep *ep; |
| 616 | struct mv_dqh *dqh; |
| 617 | u32 bit_pos, epctrlx, direction; |
Neil Zhang | 27cec2b | 2011-10-12 16:49:31 +0800 | [diff] [blame^] | 618 | unsigned long flags; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 619 | |
| 620 | ep = container_of(_ep, struct mv_ep, ep); |
| 621 | if ((_ep == NULL) || !ep->desc) |
| 622 | return -EINVAL; |
| 623 | |
| 624 | udc = ep->udc; |
| 625 | |
| 626 | /* Get the endpoint queue head address */ |
| 627 | dqh = ep->dqh; |
| 628 | |
Neil Zhang | 27cec2b | 2011-10-12 16:49:31 +0800 | [diff] [blame^] | 629 | spin_lock_irqsave(&udc->lock, flags); |
| 630 | |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 631 | direction = ep_dir(ep); |
| 632 | bit_pos = 1 << ((direction == EP_DIR_OUT ? 0 : 16) + ep->ep_num); |
| 633 | |
| 634 | /* Reset the max packet length and the interrupt on Setup */ |
| 635 | dqh->max_packet_length = 0; |
| 636 | |
| 637 | /* Disable the endpoint for Rx or Tx and reset the endpoint type */ |
| 638 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); |
| 639 | epctrlx &= ~((direction == EP_DIR_IN) |
| 640 | ? (EPCTRL_TX_ENABLE | EPCTRL_TX_TYPE) |
| 641 | : (EPCTRL_RX_ENABLE | EPCTRL_RX_TYPE)); |
| 642 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); |
| 643 | |
| 644 | /* nuke all pending requests (does flush) */ |
| 645 | nuke(ep, -ESHUTDOWN); |
| 646 | |
| 647 | ep->desc = NULL; |
| 648 | ep->stopped = 1; |
Neil Zhang | 27cec2b | 2011-10-12 16:49:31 +0800 | [diff] [blame^] | 649 | |
| 650 | spin_unlock_irqrestore(&udc->lock, flags); |
| 651 | |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 652 | return 0; |
| 653 | } |
| 654 | |
| 655 | static struct usb_request * |
| 656 | mv_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
| 657 | { |
| 658 | struct mv_req *req = NULL; |
| 659 | |
| 660 | req = kzalloc(sizeof *req, gfp_flags); |
| 661 | if (!req) |
| 662 | return NULL; |
| 663 | |
| 664 | req->req.dma = DMA_ADDR_INVALID; |
| 665 | INIT_LIST_HEAD(&req->queue); |
| 666 | |
| 667 | return &req->req; |
| 668 | } |
| 669 | |
| 670 | static void mv_free_request(struct usb_ep *_ep, struct usb_request *_req) |
| 671 | { |
| 672 | struct mv_req *req = NULL; |
| 673 | |
| 674 | req = container_of(_req, struct mv_req, req); |
| 675 | |
| 676 | if (_req) |
| 677 | kfree(req); |
| 678 | } |
| 679 | |
| 680 | static void mv_ep_fifo_flush(struct usb_ep *_ep) |
| 681 | { |
| 682 | struct mv_udc *udc; |
| 683 | u32 bit_pos, direction; |
| 684 | struct mv_ep *ep = container_of(_ep, struct mv_ep, ep); |
| 685 | unsigned int loops; |
| 686 | |
| 687 | udc = ep->udc; |
| 688 | direction = ep_dir(ep); |
| 689 | bit_pos = 1 << ((direction == EP_DIR_OUT ? 0 : 16) + ep->ep_num); |
| 690 | /* |
| 691 | * Flushing will halt the pipe |
| 692 | * Write 1 to the Flush register |
| 693 | */ |
| 694 | writel(bit_pos, &udc->op_regs->epflush); |
| 695 | |
| 696 | /* Wait until flushing completed */ |
| 697 | loops = LOOPS(FLUSH_TIMEOUT); |
| 698 | while (readl(&udc->op_regs->epflush) & bit_pos) { |
| 699 | /* |
| 700 | * ENDPTFLUSH bit should be cleared to indicate this |
| 701 | * operation is complete |
| 702 | */ |
| 703 | if (loops == 0) { |
| 704 | dev_err(&udc->dev->dev, |
| 705 | "TIMEOUT for ENDPTFLUSH=0x%x, bit_pos=0x%x\n", |
| 706 | (unsigned)readl(&udc->op_regs->epflush), |
| 707 | (unsigned)bit_pos); |
| 708 | return; |
| 709 | } |
| 710 | loops--; |
| 711 | udelay(LOOPS_USEC); |
| 712 | } |
| 713 | loops = LOOPS(EPSTATUS_TIMEOUT); |
| 714 | while (readl(&udc->op_regs->epstatus) & bit_pos) { |
| 715 | unsigned int inter_loops; |
| 716 | |
| 717 | if (loops == 0) { |
| 718 | dev_err(&udc->dev->dev, |
| 719 | "TIMEOUT for ENDPTSTATUS=0x%x, bit_pos=0x%x\n", |
| 720 | (unsigned)readl(&udc->op_regs->epstatus), |
| 721 | (unsigned)bit_pos); |
| 722 | return; |
| 723 | } |
| 724 | /* Write 1 to the Flush register */ |
| 725 | writel(bit_pos, &udc->op_regs->epflush); |
| 726 | |
| 727 | /* Wait until flushing completed */ |
| 728 | inter_loops = LOOPS(FLUSH_TIMEOUT); |
| 729 | while (readl(&udc->op_regs->epflush) & bit_pos) { |
| 730 | /* |
| 731 | * ENDPTFLUSH bit should be cleared to indicate this |
| 732 | * operation is complete |
| 733 | */ |
| 734 | if (inter_loops == 0) { |
| 735 | dev_err(&udc->dev->dev, |
| 736 | "TIMEOUT for ENDPTFLUSH=0x%x," |
| 737 | "bit_pos=0x%x\n", |
| 738 | (unsigned)readl(&udc->op_regs->epflush), |
| 739 | (unsigned)bit_pos); |
| 740 | return; |
| 741 | } |
| 742 | inter_loops--; |
| 743 | udelay(LOOPS_USEC); |
| 744 | } |
| 745 | loops--; |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | /* queues (submits) an I/O request to an endpoint */ |
| 750 | static int |
| 751 | mv_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
| 752 | { |
| 753 | struct mv_ep *ep = container_of(_ep, struct mv_ep, ep); |
| 754 | struct mv_req *req = container_of(_req, struct mv_req, req); |
| 755 | struct mv_udc *udc = ep->udc; |
| 756 | unsigned long flags; |
| 757 | |
| 758 | /* catch various bogus parameters */ |
| 759 | if (!_req || !req->req.complete || !req->req.buf |
| 760 | || !list_empty(&req->queue)) { |
| 761 | dev_err(&udc->dev->dev, "%s, bad params", __func__); |
| 762 | return -EINVAL; |
| 763 | } |
| 764 | if (unlikely(!_ep || !ep->desc)) { |
| 765 | dev_err(&udc->dev->dev, "%s, bad ep", __func__); |
| 766 | return -EINVAL; |
| 767 | } |
| 768 | if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) { |
| 769 | if (req->req.length > ep->ep.maxpacket) |
| 770 | return -EMSGSIZE; |
| 771 | } |
| 772 | |
| 773 | udc = ep->udc; |
| 774 | if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) |
| 775 | return -ESHUTDOWN; |
| 776 | |
| 777 | req->ep = ep; |
| 778 | |
| 779 | /* map virtual address to hardware */ |
| 780 | if (req->req.dma == DMA_ADDR_INVALID) { |
| 781 | req->req.dma = dma_map_single(ep->udc->gadget.dev.parent, |
| 782 | req->req.buf, |
| 783 | req->req.length, ep_dir(ep) |
| 784 | ? DMA_TO_DEVICE |
| 785 | : DMA_FROM_DEVICE); |
| 786 | req->mapped = 1; |
| 787 | } else { |
| 788 | dma_sync_single_for_device(ep->udc->gadget.dev.parent, |
| 789 | req->req.dma, req->req.length, |
| 790 | ep_dir(ep) |
| 791 | ? DMA_TO_DEVICE |
| 792 | : DMA_FROM_DEVICE); |
| 793 | req->mapped = 0; |
| 794 | } |
| 795 | |
| 796 | req->req.status = -EINPROGRESS; |
| 797 | req->req.actual = 0; |
| 798 | req->dtd_count = 0; |
| 799 | |
| 800 | spin_lock_irqsave(&udc->lock, flags); |
| 801 | |
| 802 | /* build dtds and push them to device queue */ |
| 803 | if (!req_to_dtd(req)) { |
| 804 | int retval; |
| 805 | retval = queue_dtd(ep, req); |
| 806 | if (retval) { |
| 807 | spin_unlock_irqrestore(&udc->lock, flags); |
| 808 | return retval; |
| 809 | } |
| 810 | } else { |
| 811 | spin_unlock_irqrestore(&udc->lock, flags); |
| 812 | return -ENOMEM; |
| 813 | } |
| 814 | |
| 815 | /* Update ep0 state */ |
| 816 | if (ep->ep_num == 0) |
| 817 | udc->ep0_state = DATA_STATE_XMIT; |
| 818 | |
| 819 | /* irq handler advances the queue */ |
| 820 | if (req != NULL) |
| 821 | list_add_tail(&req->queue, &ep->queue); |
| 822 | spin_unlock_irqrestore(&udc->lock, flags); |
| 823 | |
| 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | /* dequeues (cancels, unlinks) an I/O request from an endpoint */ |
| 828 | static int mv_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| 829 | { |
| 830 | struct mv_ep *ep = container_of(_ep, struct mv_ep, ep); |
| 831 | struct mv_req *req; |
| 832 | struct mv_udc *udc = ep->udc; |
| 833 | unsigned long flags; |
| 834 | int stopped, ret = 0; |
| 835 | u32 epctrlx; |
| 836 | |
| 837 | if (!_ep || !_req) |
| 838 | return -EINVAL; |
| 839 | |
| 840 | spin_lock_irqsave(&ep->udc->lock, flags); |
| 841 | stopped = ep->stopped; |
| 842 | |
| 843 | /* Stop the ep before we deal with the queue */ |
| 844 | ep->stopped = 1; |
| 845 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); |
| 846 | if (ep_dir(ep) == EP_DIR_IN) |
| 847 | epctrlx &= ~EPCTRL_TX_ENABLE; |
| 848 | else |
| 849 | epctrlx &= ~EPCTRL_RX_ENABLE; |
| 850 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); |
| 851 | |
| 852 | /* make sure it's actually queued on this endpoint */ |
| 853 | list_for_each_entry(req, &ep->queue, queue) { |
| 854 | if (&req->req == _req) |
| 855 | break; |
| 856 | } |
| 857 | if (&req->req != _req) { |
| 858 | ret = -EINVAL; |
| 859 | goto out; |
| 860 | } |
| 861 | |
| 862 | /* The request is in progress, or completed but not dequeued */ |
| 863 | if (ep->queue.next == &req->queue) { |
| 864 | _req->status = -ECONNRESET; |
| 865 | mv_ep_fifo_flush(_ep); /* flush current transfer */ |
| 866 | |
| 867 | /* The request isn't the last request in this ep queue */ |
| 868 | if (req->queue.next != &ep->queue) { |
| 869 | struct mv_dqh *qh; |
| 870 | struct mv_req *next_req; |
| 871 | |
| 872 | qh = ep->dqh; |
| 873 | next_req = list_entry(req->queue.next, struct mv_req, |
| 874 | queue); |
| 875 | |
| 876 | /* Point the QH to the first TD of next request */ |
| 877 | writel((u32) next_req->head, &qh->curr_dtd_ptr); |
| 878 | } else { |
| 879 | struct mv_dqh *qh; |
| 880 | |
| 881 | qh = ep->dqh; |
| 882 | qh->next_dtd_ptr = 1; |
| 883 | qh->size_ioc_int_sts = 0; |
| 884 | } |
| 885 | |
| 886 | /* The request hasn't been processed, patch up the TD chain */ |
| 887 | } else { |
| 888 | struct mv_req *prev_req; |
| 889 | |
| 890 | prev_req = list_entry(req->queue.prev, struct mv_req, queue); |
| 891 | writel(readl(&req->tail->dtd_next), |
| 892 | &prev_req->tail->dtd_next); |
| 893 | |
| 894 | } |
| 895 | |
| 896 | done(ep, req, -ECONNRESET); |
| 897 | |
| 898 | /* Enable EP */ |
| 899 | out: |
| 900 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); |
| 901 | if (ep_dir(ep) == EP_DIR_IN) |
| 902 | epctrlx |= EPCTRL_TX_ENABLE; |
| 903 | else |
| 904 | epctrlx |= EPCTRL_RX_ENABLE; |
| 905 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); |
| 906 | ep->stopped = stopped; |
| 907 | |
| 908 | spin_unlock_irqrestore(&ep->udc->lock, flags); |
| 909 | return ret; |
| 910 | } |
| 911 | |
| 912 | static void ep_set_stall(struct mv_udc *udc, u8 ep_num, u8 direction, int stall) |
| 913 | { |
| 914 | u32 epctrlx; |
| 915 | |
| 916 | epctrlx = readl(&udc->op_regs->epctrlx[ep_num]); |
| 917 | |
| 918 | if (stall) { |
| 919 | if (direction == EP_DIR_IN) |
| 920 | epctrlx |= EPCTRL_TX_EP_STALL; |
| 921 | else |
| 922 | epctrlx |= EPCTRL_RX_EP_STALL; |
| 923 | } else { |
| 924 | if (direction == EP_DIR_IN) { |
| 925 | epctrlx &= ~EPCTRL_TX_EP_STALL; |
| 926 | epctrlx |= EPCTRL_TX_DATA_TOGGLE_RST; |
| 927 | } else { |
| 928 | epctrlx &= ~EPCTRL_RX_EP_STALL; |
| 929 | epctrlx |= EPCTRL_RX_DATA_TOGGLE_RST; |
| 930 | } |
| 931 | } |
| 932 | writel(epctrlx, &udc->op_regs->epctrlx[ep_num]); |
| 933 | } |
| 934 | |
| 935 | static int ep_is_stall(struct mv_udc *udc, u8 ep_num, u8 direction) |
| 936 | { |
| 937 | u32 epctrlx; |
| 938 | |
| 939 | epctrlx = readl(&udc->op_regs->epctrlx[ep_num]); |
| 940 | |
| 941 | if (direction == EP_DIR_OUT) |
| 942 | return (epctrlx & EPCTRL_RX_EP_STALL) ? 1 : 0; |
| 943 | else |
| 944 | return (epctrlx & EPCTRL_TX_EP_STALL) ? 1 : 0; |
| 945 | } |
| 946 | |
| 947 | static int mv_ep_set_halt_wedge(struct usb_ep *_ep, int halt, int wedge) |
| 948 | { |
| 949 | struct mv_ep *ep; |
| 950 | unsigned long flags = 0; |
| 951 | int status = 0; |
| 952 | struct mv_udc *udc; |
| 953 | |
| 954 | ep = container_of(_ep, struct mv_ep, ep); |
| 955 | udc = ep->udc; |
| 956 | if (!_ep || !ep->desc) { |
| 957 | status = -EINVAL; |
| 958 | goto out; |
| 959 | } |
| 960 | |
| 961 | if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) { |
| 962 | status = -EOPNOTSUPP; |
| 963 | goto out; |
| 964 | } |
| 965 | |
| 966 | /* |
| 967 | * Attempt to halt IN ep will fail if any transfer requests |
| 968 | * are still queue |
| 969 | */ |
| 970 | if (halt && (ep_dir(ep) == EP_DIR_IN) && !list_empty(&ep->queue)) { |
| 971 | status = -EAGAIN; |
| 972 | goto out; |
| 973 | } |
| 974 | |
| 975 | spin_lock_irqsave(&ep->udc->lock, flags); |
| 976 | ep_set_stall(udc, ep->ep_num, ep_dir(ep), halt); |
| 977 | if (halt && wedge) |
| 978 | ep->wedge = 1; |
| 979 | else if (!halt) |
| 980 | ep->wedge = 0; |
| 981 | spin_unlock_irqrestore(&ep->udc->lock, flags); |
| 982 | |
| 983 | if (ep->ep_num == 0) { |
| 984 | udc->ep0_state = WAIT_FOR_SETUP; |
| 985 | udc->ep0_dir = EP_DIR_OUT; |
| 986 | } |
| 987 | out: |
| 988 | return status; |
| 989 | } |
| 990 | |
| 991 | static int mv_ep_set_halt(struct usb_ep *_ep, int halt) |
| 992 | { |
| 993 | return mv_ep_set_halt_wedge(_ep, halt, 0); |
| 994 | } |
| 995 | |
| 996 | static int mv_ep_set_wedge(struct usb_ep *_ep) |
| 997 | { |
| 998 | return mv_ep_set_halt_wedge(_ep, 1, 1); |
| 999 | } |
| 1000 | |
| 1001 | static struct usb_ep_ops mv_ep_ops = { |
| 1002 | .enable = mv_ep_enable, |
| 1003 | .disable = mv_ep_disable, |
| 1004 | |
| 1005 | .alloc_request = mv_alloc_request, |
| 1006 | .free_request = mv_free_request, |
| 1007 | |
| 1008 | .queue = mv_ep_queue, |
| 1009 | .dequeue = mv_ep_dequeue, |
| 1010 | |
| 1011 | .set_wedge = mv_ep_set_wedge, |
| 1012 | .set_halt = mv_ep_set_halt, |
| 1013 | .fifo_flush = mv_ep_fifo_flush, /* flush fifo */ |
| 1014 | }; |
| 1015 | |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 1016 | static void udc_clock_enable(struct mv_udc *udc) |
| 1017 | { |
| 1018 | unsigned int i; |
| 1019 | |
| 1020 | for (i = 0; i < udc->clknum; i++) |
| 1021 | clk_enable(udc->clk[i]); |
| 1022 | } |
| 1023 | |
| 1024 | static void udc_clock_disable(struct mv_udc *udc) |
| 1025 | { |
| 1026 | unsigned int i; |
| 1027 | |
| 1028 | for (i = 0; i < udc->clknum; i++) |
| 1029 | clk_disable(udc->clk[i]); |
| 1030 | } |
| 1031 | |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1032 | static void udc_stop(struct mv_udc *udc) |
| 1033 | { |
| 1034 | u32 tmp; |
| 1035 | |
| 1036 | /* Disable interrupts */ |
| 1037 | tmp = readl(&udc->op_regs->usbintr); |
| 1038 | tmp &= ~(USBINTR_INT_EN | USBINTR_ERR_INT_EN | |
| 1039 | USBINTR_PORT_CHANGE_DETECT_EN | USBINTR_RESET_EN); |
| 1040 | writel(tmp, &udc->op_regs->usbintr); |
| 1041 | |
| 1042 | /* Reset the Run the bit in the command register to stop VUSB */ |
| 1043 | tmp = readl(&udc->op_regs->usbcmd); |
| 1044 | tmp &= ~USBCMD_RUN_STOP; |
| 1045 | writel(tmp, &udc->op_regs->usbcmd); |
| 1046 | } |
| 1047 | |
| 1048 | static void udc_start(struct mv_udc *udc) |
| 1049 | { |
| 1050 | u32 usbintr; |
| 1051 | |
| 1052 | usbintr = USBINTR_INT_EN | USBINTR_ERR_INT_EN |
| 1053 | | USBINTR_PORT_CHANGE_DETECT_EN |
| 1054 | | USBINTR_RESET_EN | USBINTR_DEVICE_SUSPEND; |
| 1055 | /* Enable interrupts */ |
| 1056 | writel(usbintr, &udc->op_regs->usbintr); |
| 1057 | |
| 1058 | /* Set the Run bit in the command register */ |
| 1059 | writel(USBCMD_RUN_STOP, &udc->op_regs->usbcmd); |
| 1060 | } |
| 1061 | |
| 1062 | static int udc_reset(struct mv_udc *udc) |
| 1063 | { |
| 1064 | unsigned int loops; |
| 1065 | u32 tmp, portsc; |
| 1066 | |
| 1067 | /* Stop the controller */ |
| 1068 | tmp = readl(&udc->op_regs->usbcmd); |
| 1069 | tmp &= ~USBCMD_RUN_STOP; |
| 1070 | writel(tmp, &udc->op_regs->usbcmd); |
| 1071 | |
| 1072 | /* Reset the controller to get default values */ |
| 1073 | writel(USBCMD_CTRL_RESET, &udc->op_regs->usbcmd); |
| 1074 | |
| 1075 | /* wait for reset to complete */ |
| 1076 | loops = LOOPS(RESET_TIMEOUT); |
| 1077 | while (readl(&udc->op_regs->usbcmd) & USBCMD_CTRL_RESET) { |
| 1078 | if (loops == 0) { |
| 1079 | dev_err(&udc->dev->dev, |
| 1080 | "Wait for RESET completed TIMEOUT\n"); |
| 1081 | return -ETIMEDOUT; |
| 1082 | } |
| 1083 | loops--; |
| 1084 | udelay(LOOPS_USEC); |
| 1085 | } |
| 1086 | |
| 1087 | /* set controller to device mode */ |
| 1088 | tmp = readl(&udc->op_regs->usbmode); |
| 1089 | tmp |= USBMODE_CTRL_MODE_DEVICE; |
| 1090 | |
| 1091 | /* turn setup lockout off, require setup tripwire in usbcmd */ |
| 1092 | tmp |= USBMODE_SETUP_LOCK_OFF | USBMODE_STREAM_DISABLE; |
| 1093 | |
| 1094 | writel(tmp, &udc->op_regs->usbmode); |
| 1095 | |
| 1096 | writel(0x0, &udc->op_regs->epsetupstat); |
| 1097 | |
| 1098 | /* Configure the Endpoint List Address */ |
| 1099 | writel(udc->ep_dqh_dma & USB_EP_LIST_ADDRESS_MASK, |
| 1100 | &udc->op_regs->eplistaddr); |
| 1101 | |
| 1102 | portsc = readl(&udc->op_regs->portsc[0]); |
| 1103 | if (readl(&udc->cap_regs->hcsparams) & HCSPARAMS_PPC) |
| 1104 | portsc &= (~PORTSCX_W1C_BITS | ~PORTSCX_PORT_POWER); |
| 1105 | |
| 1106 | if (udc->force_fs) |
| 1107 | portsc |= PORTSCX_FORCE_FULL_SPEED_CONNECT; |
| 1108 | else |
| 1109 | portsc &= (~PORTSCX_FORCE_FULL_SPEED_CONNECT); |
| 1110 | |
| 1111 | writel(portsc, &udc->op_regs->portsc[0]); |
| 1112 | |
| 1113 | tmp = readl(&udc->op_regs->epctrlx[0]); |
| 1114 | tmp &= ~(EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL); |
| 1115 | writel(tmp, &udc->op_regs->epctrlx[0]); |
| 1116 | |
| 1117 | return 0; |
| 1118 | } |
| 1119 | |
| 1120 | static int mv_udc_get_frame(struct usb_gadget *gadget) |
| 1121 | { |
| 1122 | struct mv_udc *udc; |
| 1123 | u16 retval; |
| 1124 | |
| 1125 | if (!gadget) |
| 1126 | return -ENODEV; |
| 1127 | |
| 1128 | udc = container_of(gadget, struct mv_udc, gadget); |
| 1129 | |
| 1130 | retval = readl(udc->op_regs->frindex) & USB_FRINDEX_MASKS; |
| 1131 | |
| 1132 | return retval; |
| 1133 | } |
| 1134 | |
| 1135 | /* Tries to wake up the host connected to this gadget */ |
| 1136 | static int mv_udc_wakeup(struct usb_gadget *gadget) |
| 1137 | { |
| 1138 | struct mv_udc *udc = container_of(gadget, struct mv_udc, gadget); |
| 1139 | u32 portsc; |
| 1140 | |
| 1141 | /* Remote wakeup feature not enabled by host */ |
| 1142 | if (!udc->remote_wakeup) |
| 1143 | return -ENOTSUPP; |
| 1144 | |
| 1145 | portsc = readl(&udc->op_regs->portsc); |
| 1146 | /* not suspended? */ |
| 1147 | if (!(portsc & PORTSCX_PORT_SUSPEND)) |
| 1148 | return 0; |
| 1149 | /* trigger force resume */ |
| 1150 | portsc |= PORTSCX_PORT_FORCE_RESUME; |
| 1151 | writel(portsc, &udc->op_regs->portsc[0]); |
| 1152 | return 0; |
| 1153 | } |
| 1154 | |
| 1155 | static int mv_udc_pullup(struct usb_gadget *gadget, int is_on) |
| 1156 | { |
| 1157 | struct mv_udc *udc; |
| 1158 | unsigned long flags; |
| 1159 | |
| 1160 | udc = container_of(gadget, struct mv_udc, gadget); |
| 1161 | spin_lock_irqsave(&udc->lock, flags); |
| 1162 | |
| 1163 | udc->softconnect = (is_on != 0); |
| 1164 | if (udc->driver && udc->softconnect) |
| 1165 | udc_start(udc); |
| 1166 | else |
| 1167 | udc_stop(udc); |
| 1168 | |
| 1169 | spin_unlock_irqrestore(&udc->lock, flags); |
| 1170 | return 0; |
| 1171 | } |
| 1172 | |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 1173 | static int mv_udc_start(struct usb_gadget_driver *driver, |
| 1174 | int (*bind)(struct usb_gadget *)); |
| 1175 | static int mv_udc_stop(struct usb_gadget_driver *driver); |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1176 | /* device controller usb_gadget_ops structure */ |
| 1177 | static const struct usb_gadget_ops mv_ops = { |
| 1178 | |
| 1179 | /* returns the current frame number */ |
| 1180 | .get_frame = mv_udc_get_frame, |
| 1181 | |
| 1182 | /* tries to wake up the host connected to this gadget */ |
| 1183 | .wakeup = mv_udc_wakeup, |
| 1184 | |
| 1185 | /* D+ pullup, software-controlled connect/disconnect to USB host */ |
| 1186 | .pullup = mv_udc_pullup, |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 1187 | .start = mv_udc_start, |
| 1188 | .stop = mv_udc_stop, |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1189 | }; |
| 1190 | |
| 1191 | static void mv_udc_testmode(struct mv_udc *udc, u16 index, bool enter) |
| 1192 | { |
| 1193 | dev_info(&udc->dev->dev, "Test Mode is not support yet\n"); |
| 1194 | } |
| 1195 | |
| 1196 | static int eps_init(struct mv_udc *udc) |
| 1197 | { |
| 1198 | struct mv_ep *ep; |
| 1199 | char name[14]; |
| 1200 | int i; |
| 1201 | |
| 1202 | /* initialize ep0 */ |
| 1203 | ep = &udc->eps[0]; |
| 1204 | ep->udc = udc; |
| 1205 | strncpy(ep->name, "ep0", sizeof(ep->name)); |
| 1206 | ep->ep.name = ep->name; |
| 1207 | ep->ep.ops = &mv_ep_ops; |
| 1208 | ep->wedge = 0; |
| 1209 | ep->stopped = 0; |
| 1210 | ep->ep.maxpacket = EP0_MAX_PKT_SIZE; |
| 1211 | ep->ep_num = 0; |
| 1212 | ep->desc = &mv_ep0_desc; |
| 1213 | INIT_LIST_HEAD(&ep->queue); |
| 1214 | |
| 1215 | ep->ep_type = USB_ENDPOINT_XFER_CONTROL; |
| 1216 | |
| 1217 | /* initialize other endpoints */ |
| 1218 | for (i = 2; i < udc->max_eps * 2; i++) { |
| 1219 | ep = &udc->eps[i]; |
| 1220 | if (i % 2) { |
| 1221 | snprintf(name, sizeof(name), "ep%din", i / 2); |
| 1222 | ep->direction = EP_DIR_IN; |
| 1223 | } else { |
| 1224 | snprintf(name, sizeof(name), "ep%dout", i / 2); |
| 1225 | ep->direction = EP_DIR_OUT; |
| 1226 | } |
| 1227 | ep->udc = udc; |
| 1228 | strncpy(ep->name, name, sizeof(ep->name)); |
| 1229 | ep->ep.name = ep->name; |
| 1230 | |
| 1231 | ep->ep.ops = &mv_ep_ops; |
| 1232 | ep->stopped = 0; |
| 1233 | ep->ep.maxpacket = (unsigned short) ~0; |
| 1234 | ep->ep_num = i / 2; |
| 1235 | |
| 1236 | INIT_LIST_HEAD(&ep->queue); |
| 1237 | list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); |
| 1238 | |
| 1239 | ep->dqh = &udc->ep_dqh[i]; |
| 1240 | } |
| 1241 | |
| 1242 | return 0; |
| 1243 | } |
| 1244 | |
| 1245 | /* delete all endpoint requests, called with spinlock held */ |
| 1246 | static void nuke(struct mv_ep *ep, int status) |
| 1247 | { |
| 1248 | /* called with spinlock held */ |
| 1249 | ep->stopped = 1; |
| 1250 | |
| 1251 | /* endpoint fifo flush */ |
| 1252 | mv_ep_fifo_flush(&ep->ep); |
| 1253 | |
| 1254 | while (!list_empty(&ep->queue)) { |
| 1255 | struct mv_req *req = NULL; |
| 1256 | req = list_entry(ep->queue.next, struct mv_req, queue); |
| 1257 | done(ep, req, status); |
| 1258 | } |
| 1259 | } |
| 1260 | |
| 1261 | /* stop all USB activities */ |
| 1262 | static void stop_activity(struct mv_udc *udc, struct usb_gadget_driver *driver) |
| 1263 | { |
| 1264 | struct mv_ep *ep; |
| 1265 | |
| 1266 | nuke(&udc->eps[0], -ESHUTDOWN); |
| 1267 | |
| 1268 | list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) { |
| 1269 | nuke(ep, -ESHUTDOWN); |
| 1270 | } |
| 1271 | |
| 1272 | /* report disconnect; the driver is already quiesced */ |
| 1273 | if (driver) { |
| 1274 | spin_unlock(&udc->lock); |
| 1275 | driver->disconnect(&udc->gadget); |
| 1276 | spin_lock(&udc->lock); |
| 1277 | } |
| 1278 | } |
| 1279 | |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 1280 | static int mv_udc_start(struct usb_gadget_driver *driver, |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1281 | int (*bind)(struct usb_gadget *)) |
| 1282 | { |
| 1283 | struct mv_udc *udc = the_controller; |
| 1284 | int retval = 0; |
| 1285 | unsigned long flags; |
| 1286 | |
| 1287 | if (!udc) |
| 1288 | return -ENODEV; |
| 1289 | |
| 1290 | if (udc->driver) |
| 1291 | return -EBUSY; |
| 1292 | |
| 1293 | spin_lock_irqsave(&udc->lock, flags); |
| 1294 | |
| 1295 | /* hook up the driver ... */ |
| 1296 | driver->driver.bus = NULL; |
| 1297 | udc->driver = driver; |
| 1298 | udc->gadget.dev.driver = &driver->driver; |
| 1299 | |
| 1300 | udc->usb_state = USB_STATE_ATTACHED; |
| 1301 | udc->ep0_state = WAIT_FOR_SETUP; |
| 1302 | udc->ep0_dir = USB_DIR_OUT; |
| 1303 | |
| 1304 | spin_unlock_irqrestore(&udc->lock, flags); |
| 1305 | |
| 1306 | retval = bind(&udc->gadget); |
| 1307 | if (retval) { |
| 1308 | dev_err(&udc->dev->dev, "bind to driver %s --> %d\n", |
| 1309 | driver->driver.name, retval); |
| 1310 | udc->driver = NULL; |
| 1311 | udc->gadget.dev.driver = NULL; |
| 1312 | return retval; |
| 1313 | } |
| 1314 | udc_reset(udc); |
| 1315 | ep0_reset(udc); |
| 1316 | udc_start(udc); |
| 1317 | |
| 1318 | return 0; |
| 1319 | } |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1320 | |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 1321 | static int mv_udc_stop(struct usb_gadget_driver *driver) |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1322 | { |
| 1323 | struct mv_udc *udc = the_controller; |
| 1324 | unsigned long flags; |
| 1325 | |
| 1326 | if (!udc) |
| 1327 | return -ENODEV; |
| 1328 | |
| 1329 | udc_stop(udc); |
| 1330 | |
| 1331 | spin_lock_irqsave(&udc->lock, flags); |
| 1332 | |
| 1333 | /* stop all usb activities */ |
| 1334 | udc->gadget.speed = USB_SPEED_UNKNOWN; |
| 1335 | stop_activity(udc, driver); |
| 1336 | spin_unlock_irqrestore(&udc->lock, flags); |
| 1337 | |
| 1338 | /* unbind gadget driver */ |
| 1339 | driver->unbind(&udc->gadget); |
| 1340 | udc->gadget.dev.driver = NULL; |
| 1341 | udc->driver = NULL; |
| 1342 | |
| 1343 | return 0; |
| 1344 | } |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1345 | |
| 1346 | static int |
| 1347 | udc_prime_status(struct mv_udc *udc, u8 direction, u16 status, bool empty) |
| 1348 | { |
| 1349 | int retval = 0; |
| 1350 | struct mv_req *req; |
| 1351 | struct mv_ep *ep; |
| 1352 | |
| 1353 | ep = &udc->eps[0]; |
| 1354 | udc->ep0_dir = direction; |
| 1355 | |
| 1356 | req = udc->status_req; |
| 1357 | |
| 1358 | /* fill in the reqest structure */ |
| 1359 | if (empty == false) { |
| 1360 | *((u16 *) req->req.buf) = cpu_to_le16(status); |
| 1361 | req->req.length = 2; |
| 1362 | } else |
| 1363 | req->req.length = 0; |
| 1364 | |
| 1365 | req->ep = ep; |
| 1366 | req->req.status = -EINPROGRESS; |
| 1367 | req->req.actual = 0; |
| 1368 | req->req.complete = NULL; |
| 1369 | req->dtd_count = 0; |
| 1370 | |
| 1371 | /* prime the data phase */ |
| 1372 | if (!req_to_dtd(req)) |
| 1373 | retval = queue_dtd(ep, req); |
| 1374 | else{ /* no mem */ |
| 1375 | retval = -ENOMEM; |
| 1376 | goto out; |
| 1377 | } |
| 1378 | |
| 1379 | if (retval) { |
| 1380 | dev_err(&udc->dev->dev, "response error on GET_STATUS request\n"); |
| 1381 | goto out; |
| 1382 | } |
| 1383 | |
| 1384 | list_add_tail(&req->queue, &ep->queue); |
| 1385 | |
| 1386 | return 0; |
| 1387 | out: |
| 1388 | return retval; |
| 1389 | } |
| 1390 | |
| 1391 | static void ch9setaddress(struct mv_udc *udc, struct usb_ctrlrequest *setup) |
| 1392 | { |
| 1393 | udc->dev_addr = (u8)setup->wValue; |
| 1394 | |
| 1395 | /* update usb state */ |
| 1396 | udc->usb_state = USB_STATE_ADDRESS; |
| 1397 | |
| 1398 | if (udc_prime_status(udc, EP_DIR_IN, 0, true)) |
| 1399 | ep0_stall(udc); |
| 1400 | } |
| 1401 | |
| 1402 | static void ch9getstatus(struct mv_udc *udc, u8 ep_num, |
| 1403 | struct usb_ctrlrequest *setup) |
| 1404 | { |
| 1405 | u16 status; |
| 1406 | int retval; |
| 1407 | |
| 1408 | if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK)) |
| 1409 | != (USB_DIR_IN | USB_TYPE_STANDARD)) |
| 1410 | return; |
| 1411 | |
| 1412 | if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) { |
| 1413 | status = 1 << USB_DEVICE_SELF_POWERED; |
| 1414 | status |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP; |
| 1415 | } else if ((setup->bRequestType & USB_RECIP_MASK) |
| 1416 | == USB_RECIP_INTERFACE) { |
| 1417 | /* get interface status */ |
| 1418 | status = 0; |
| 1419 | } else if ((setup->bRequestType & USB_RECIP_MASK) |
| 1420 | == USB_RECIP_ENDPOINT) { |
| 1421 | u8 ep_num, direction; |
| 1422 | |
| 1423 | ep_num = setup->wIndex & USB_ENDPOINT_NUMBER_MASK; |
| 1424 | direction = (setup->wIndex & USB_ENDPOINT_DIR_MASK) |
| 1425 | ? EP_DIR_IN : EP_DIR_OUT; |
| 1426 | status = ep_is_stall(udc, ep_num, direction) |
| 1427 | << USB_ENDPOINT_HALT; |
| 1428 | } |
| 1429 | |
| 1430 | retval = udc_prime_status(udc, EP_DIR_IN, status, false); |
| 1431 | if (retval) |
| 1432 | ep0_stall(udc); |
| 1433 | } |
| 1434 | |
| 1435 | static void ch9clearfeature(struct mv_udc *udc, struct usb_ctrlrequest *setup) |
| 1436 | { |
| 1437 | u8 ep_num; |
| 1438 | u8 direction; |
| 1439 | struct mv_ep *ep; |
| 1440 | |
| 1441 | if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) |
| 1442 | == ((USB_TYPE_STANDARD | USB_RECIP_DEVICE))) { |
| 1443 | switch (setup->wValue) { |
| 1444 | case USB_DEVICE_REMOTE_WAKEUP: |
| 1445 | udc->remote_wakeup = 0; |
| 1446 | break; |
| 1447 | case USB_DEVICE_TEST_MODE: |
| 1448 | mv_udc_testmode(udc, 0, false); |
| 1449 | break; |
| 1450 | default: |
| 1451 | goto out; |
| 1452 | } |
| 1453 | } else if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) |
| 1454 | == ((USB_TYPE_STANDARD | USB_RECIP_ENDPOINT))) { |
| 1455 | switch (setup->wValue) { |
| 1456 | case USB_ENDPOINT_HALT: |
| 1457 | ep_num = setup->wIndex & USB_ENDPOINT_NUMBER_MASK; |
| 1458 | direction = (setup->wIndex & USB_ENDPOINT_DIR_MASK) |
| 1459 | ? EP_DIR_IN : EP_DIR_OUT; |
| 1460 | if (setup->wValue != 0 || setup->wLength != 0 |
| 1461 | || ep_num > udc->max_eps) |
| 1462 | goto out; |
| 1463 | ep = &udc->eps[ep_num * 2 + direction]; |
| 1464 | if (ep->wedge == 1) |
| 1465 | break; |
| 1466 | spin_unlock(&udc->lock); |
| 1467 | ep_set_stall(udc, ep_num, direction, 0); |
| 1468 | spin_lock(&udc->lock); |
| 1469 | break; |
| 1470 | default: |
| 1471 | goto out; |
| 1472 | } |
| 1473 | } else |
| 1474 | goto out; |
| 1475 | |
| 1476 | if (udc_prime_status(udc, EP_DIR_IN, 0, true)) |
| 1477 | ep0_stall(udc); |
| 1478 | else |
| 1479 | udc->ep0_state = DATA_STATE_XMIT; |
| 1480 | out: |
| 1481 | return; |
| 1482 | } |
| 1483 | |
| 1484 | static void ch9setfeature(struct mv_udc *udc, struct usb_ctrlrequest *setup) |
| 1485 | { |
| 1486 | u8 ep_num; |
| 1487 | u8 direction; |
| 1488 | |
| 1489 | if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) |
| 1490 | == ((USB_TYPE_STANDARD | USB_RECIP_DEVICE))) { |
| 1491 | switch (setup->wValue) { |
| 1492 | case USB_DEVICE_REMOTE_WAKEUP: |
| 1493 | udc->remote_wakeup = 1; |
| 1494 | break; |
| 1495 | case USB_DEVICE_TEST_MODE: |
| 1496 | if (setup->wIndex & 0xFF |
| 1497 | && udc->gadget.speed != USB_SPEED_HIGH) |
| 1498 | goto out; |
| 1499 | if (udc->usb_state == USB_STATE_CONFIGURED |
| 1500 | || udc->usb_state == USB_STATE_ADDRESS |
| 1501 | || udc->usb_state == USB_STATE_DEFAULT) |
| 1502 | mv_udc_testmode(udc, |
| 1503 | setup->wIndex & 0xFF00, true); |
| 1504 | else |
| 1505 | goto out; |
| 1506 | break; |
| 1507 | default: |
| 1508 | goto out; |
| 1509 | } |
| 1510 | } else if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) |
| 1511 | == ((USB_TYPE_STANDARD | USB_RECIP_ENDPOINT))) { |
| 1512 | switch (setup->wValue) { |
| 1513 | case USB_ENDPOINT_HALT: |
| 1514 | ep_num = setup->wIndex & USB_ENDPOINT_NUMBER_MASK; |
| 1515 | direction = (setup->wIndex & USB_ENDPOINT_DIR_MASK) |
| 1516 | ? EP_DIR_IN : EP_DIR_OUT; |
| 1517 | if (setup->wValue != 0 || setup->wLength != 0 |
| 1518 | || ep_num > udc->max_eps) |
| 1519 | goto out; |
| 1520 | spin_unlock(&udc->lock); |
| 1521 | ep_set_stall(udc, ep_num, direction, 1); |
| 1522 | spin_lock(&udc->lock); |
| 1523 | break; |
| 1524 | default: |
| 1525 | goto out; |
| 1526 | } |
| 1527 | } else |
| 1528 | goto out; |
| 1529 | |
| 1530 | if (udc_prime_status(udc, EP_DIR_IN, 0, true)) |
| 1531 | ep0_stall(udc); |
| 1532 | out: |
| 1533 | return; |
| 1534 | } |
| 1535 | |
| 1536 | static void handle_setup_packet(struct mv_udc *udc, u8 ep_num, |
| 1537 | struct usb_ctrlrequest *setup) |
| 1538 | { |
| 1539 | bool delegate = false; |
| 1540 | |
| 1541 | nuke(&udc->eps[ep_num * 2 + EP_DIR_OUT], -ESHUTDOWN); |
| 1542 | |
| 1543 | dev_dbg(&udc->dev->dev, "SETUP %02x.%02x v%04x i%04x l%04x\n", |
| 1544 | setup->bRequestType, setup->bRequest, |
| 1545 | setup->wValue, setup->wIndex, setup->wLength); |
| 1546 | /* We process some stardard setup requests here */ |
| 1547 | if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { |
| 1548 | switch (setup->bRequest) { |
| 1549 | case USB_REQ_GET_STATUS: |
| 1550 | ch9getstatus(udc, ep_num, setup); |
| 1551 | break; |
| 1552 | |
| 1553 | case USB_REQ_SET_ADDRESS: |
| 1554 | ch9setaddress(udc, setup); |
| 1555 | break; |
| 1556 | |
| 1557 | case USB_REQ_CLEAR_FEATURE: |
| 1558 | ch9clearfeature(udc, setup); |
| 1559 | break; |
| 1560 | |
| 1561 | case USB_REQ_SET_FEATURE: |
| 1562 | ch9setfeature(udc, setup); |
| 1563 | break; |
| 1564 | |
| 1565 | default: |
| 1566 | delegate = true; |
| 1567 | } |
| 1568 | } else |
| 1569 | delegate = true; |
| 1570 | |
| 1571 | /* delegate USB standard requests to the gadget driver */ |
| 1572 | if (delegate == true) { |
| 1573 | /* USB requests handled by gadget */ |
| 1574 | if (setup->wLength) { |
| 1575 | /* DATA phase from gadget, STATUS phase from udc */ |
| 1576 | udc->ep0_dir = (setup->bRequestType & USB_DIR_IN) |
| 1577 | ? EP_DIR_IN : EP_DIR_OUT; |
| 1578 | spin_unlock(&udc->lock); |
| 1579 | if (udc->driver->setup(&udc->gadget, |
| 1580 | &udc->local_setup_buff) < 0) |
| 1581 | ep0_stall(udc); |
| 1582 | spin_lock(&udc->lock); |
| 1583 | udc->ep0_state = (setup->bRequestType & USB_DIR_IN) |
| 1584 | ? DATA_STATE_XMIT : DATA_STATE_RECV; |
| 1585 | } else { |
| 1586 | /* no DATA phase, IN STATUS phase from gadget */ |
| 1587 | udc->ep0_dir = EP_DIR_IN; |
| 1588 | spin_unlock(&udc->lock); |
| 1589 | if (udc->driver->setup(&udc->gadget, |
| 1590 | &udc->local_setup_buff) < 0) |
| 1591 | ep0_stall(udc); |
| 1592 | spin_lock(&udc->lock); |
| 1593 | udc->ep0_state = WAIT_FOR_OUT_STATUS; |
| 1594 | } |
| 1595 | } |
| 1596 | } |
| 1597 | |
| 1598 | /* complete DATA or STATUS phase of ep0 prime status phase if needed */ |
| 1599 | static void ep0_req_complete(struct mv_udc *udc, |
| 1600 | struct mv_ep *ep0, struct mv_req *req) |
| 1601 | { |
| 1602 | u32 new_addr; |
| 1603 | |
| 1604 | if (udc->usb_state == USB_STATE_ADDRESS) { |
| 1605 | /* set the new address */ |
| 1606 | new_addr = (u32)udc->dev_addr; |
| 1607 | writel(new_addr << USB_DEVICE_ADDRESS_BIT_SHIFT, |
| 1608 | &udc->op_regs->deviceaddr); |
| 1609 | } |
| 1610 | |
| 1611 | done(ep0, req, 0); |
| 1612 | |
| 1613 | switch (udc->ep0_state) { |
| 1614 | case DATA_STATE_XMIT: |
| 1615 | /* receive status phase */ |
| 1616 | if (udc_prime_status(udc, EP_DIR_OUT, 0, true)) |
| 1617 | ep0_stall(udc); |
| 1618 | break; |
| 1619 | case DATA_STATE_RECV: |
| 1620 | /* send status phase */ |
| 1621 | if (udc_prime_status(udc, EP_DIR_IN, 0 , true)) |
| 1622 | ep0_stall(udc); |
| 1623 | break; |
| 1624 | case WAIT_FOR_OUT_STATUS: |
| 1625 | udc->ep0_state = WAIT_FOR_SETUP; |
| 1626 | break; |
| 1627 | case WAIT_FOR_SETUP: |
| 1628 | dev_err(&udc->dev->dev, "unexpect ep0 packets\n"); |
| 1629 | break; |
| 1630 | default: |
| 1631 | ep0_stall(udc); |
| 1632 | break; |
| 1633 | } |
| 1634 | } |
| 1635 | |
| 1636 | static void get_setup_data(struct mv_udc *udc, u8 ep_num, u8 *buffer_ptr) |
| 1637 | { |
| 1638 | u32 temp; |
| 1639 | struct mv_dqh *dqh; |
| 1640 | |
| 1641 | dqh = &udc->ep_dqh[ep_num * 2 + EP_DIR_OUT]; |
| 1642 | |
| 1643 | /* Clear bit in ENDPTSETUPSTAT */ |
Neil Zhang | 96c2bbb | 2011-10-12 16:49:30 +0800 | [diff] [blame] | 1644 | writel((1 << ep_num), &udc->op_regs->epsetupstat); |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1645 | |
| 1646 | /* while a hazard exists when setup package arrives */ |
| 1647 | do { |
| 1648 | /* Set Setup Tripwire */ |
| 1649 | temp = readl(&udc->op_regs->usbcmd); |
| 1650 | writel(temp | USBCMD_SETUP_TRIPWIRE_SET, &udc->op_regs->usbcmd); |
| 1651 | |
| 1652 | /* Copy the setup packet to local buffer */ |
| 1653 | memcpy(buffer_ptr, (u8 *) dqh->setup_buffer, 8); |
| 1654 | } while (!(readl(&udc->op_regs->usbcmd) & USBCMD_SETUP_TRIPWIRE_SET)); |
| 1655 | |
| 1656 | /* Clear Setup Tripwire */ |
| 1657 | temp = readl(&udc->op_regs->usbcmd); |
| 1658 | writel(temp & ~USBCMD_SETUP_TRIPWIRE_SET, &udc->op_regs->usbcmd); |
| 1659 | } |
| 1660 | |
| 1661 | static void irq_process_tr_complete(struct mv_udc *udc) |
| 1662 | { |
| 1663 | u32 tmp, bit_pos; |
| 1664 | int i, ep_num = 0, direction = 0; |
| 1665 | struct mv_ep *curr_ep; |
| 1666 | struct mv_req *curr_req, *temp_req; |
| 1667 | int status; |
| 1668 | |
| 1669 | /* |
| 1670 | * We use separate loops for ENDPTSETUPSTAT and ENDPTCOMPLETE |
| 1671 | * because the setup packets are to be read ASAP |
| 1672 | */ |
| 1673 | |
| 1674 | /* Process all Setup packet received interrupts */ |
| 1675 | tmp = readl(&udc->op_regs->epsetupstat); |
| 1676 | |
| 1677 | if (tmp) { |
| 1678 | for (i = 0; i < udc->max_eps; i++) { |
| 1679 | if (tmp & (1 << i)) { |
| 1680 | get_setup_data(udc, i, |
| 1681 | (u8 *)(&udc->local_setup_buff)); |
| 1682 | handle_setup_packet(udc, i, |
| 1683 | &udc->local_setup_buff); |
| 1684 | } |
| 1685 | } |
| 1686 | } |
| 1687 | |
| 1688 | /* Don't clear the endpoint setup status register here. |
| 1689 | * It is cleared as a setup packet is read out of the buffer |
| 1690 | */ |
| 1691 | |
| 1692 | /* Process non-setup transaction complete interrupts */ |
| 1693 | tmp = readl(&udc->op_regs->epcomplete); |
| 1694 | |
| 1695 | if (!tmp) |
| 1696 | return; |
| 1697 | |
| 1698 | writel(tmp, &udc->op_regs->epcomplete); |
| 1699 | |
| 1700 | for (i = 0; i < udc->max_eps * 2; i++) { |
| 1701 | ep_num = i >> 1; |
| 1702 | direction = i % 2; |
| 1703 | |
| 1704 | bit_pos = 1 << (ep_num + 16 * direction); |
| 1705 | |
| 1706 | if (!(bit_pos & tmp)) |
| 1707 | continue; |
| 1708 | |
| 1709 | if (i == 1) |
| 1710 | curr_ep = &udc->eps[0]; |
| 1711 | else |
| 1712 | curr_ep = &udc->eps[i]; |
| 1713 | /* process the req queue until an uncomplete request */ |
| 1714 | list_for_each_entry_safe(curr_req, temp_req, |
| 1715 | &curr_ep->queue, queue) { |
| 1716 | status = process_ep_req(udc, i, curr_req); |
| 1717 | if (status) |
| 1718 | break; |
| 1719 | |
| 1720 | /* write back status to req */ |
| 1721 | curr_req->req.status = status; |
| 1722 | |
| 1723 | /* ep0 request completion */ |
| 1724 | if (ep_num == 0) { |
| 1725 | ep0_req_complete(udc, curr_ep, curr_req); |
| 1726 | break; |
| 1727 | } else { |
| 1728 | done(curr_ep, curr_req, status); |
| 1729 | } |
| 1730 | } |
| 1731 | } |
| 1732 | } |
| 1733 | |
| 1734 | void irq_process_reset(struct mv_udc *udc) |
| 1735 | { |
| 1736 | u32 tmp; |
| 1737 | unsigned int loops; |
| 1738 | |
| 1739 | udc->ep0_dir = EP_DIR_OUT; |
| 1740 | udc->ep0_state = WAIT_FOR_SETUP; |
| 1741 | udc->remote_wakeup = 0; /* default to 0 on reset */ |
| 1742 | |
| 1743 | /* The address bits are past bit 25-31. Set the address */ |
| 1744 | tmp = readl(&udc->op_regs->deviceaddr); |
| 1745 | tmp &= ~(USB_DEVICE_ADDRESS_MASK); |
| 1746 | writel(tmp, &udc->op_regs->deviceaddr); |
| 1747 | |
| 1748 | /* Clear all the setup token semaphores */ |
| 1749 | tmp = readl(&udc->op_regs->epsetupstat); |
| 1750 | writel(tmp, &udc->op_regs->epsetupstat); |
| 1751 | |
| 1752 | /* Clear all the endpoint complete status bits */ |
| 1753 | tmp = readl(&udc->op_regs->epcomplete); |
| 1754 | writel(tmp, &udc->op_regs->epcomplete); |
| 1755 | |
| 1756 | /* wait until all endptprime bits cleared */ |
| 1757 | loops = LOOPS(PRIME_TIMEOUT); |
| 1758 | while (readl(&udc->op_regs->epprime) & 0xFFFFFFFF) { |
| 1759 | if (loops == 0) { |
| 1760 | dev_err(&udc->dev->dev, |
| 1761 | "Timeout for ENDPTPRIME = 0x%x\n", |
| 1762 | readl(&udc->op_regs->epprime)); |
| 1763 | break; |
| 1764 | } |
| 1765 | loops--; |
| 1766 | udelay(LOOPS_USEC); |
| 1767 | } |
| 1768 | |
| 1769 | /* Write 1s to the Flush register */ |
| 1770 | writel((u32)~0, &udc->op_regs->epflush); |
| 1771 | |
| 1772 | if (readl(&udc->op_regs->portsc[0]) & PORTSCX_PORT_RESET) { |
| 1773 | dev_info(&udc->dev->dev, "usb bus reset\n"); |
| 1774 | udc->usb_state = USB_STATE_DEFAULT; |
| 1775 | /* reset all the queues, stop all USB activities */ |
| 1776 | stop_activity(udc, udc->driver); |
| 1777 | } else { |
| 1778 | dev_info(&udc->dev->dev, "USB reset portsc 0x%x\n", |
| 1779 | readl(&udc->op_regs->portsc)); |
| 1780 | |
| 1781 | /* |
| 1782 | * re-initialize |
| 1783 | * controller reset |
| 1784 | */ |
| 1785 | udc_reset(udc); |
| 1786 | |
| 1787 | /* reset all the queues, stop all USB activities */ |
| 1788 | stop_activity(udc, udc->driver); |
| 1789 | |
| 1790 | /* reset ep0 dQH and endptctrl */ |
| 1791 | ep0_reset(udc); |
| 1792 | |
| 1793 | /* enable interrupt and set controller to run state */ |
| 1794 | udc_start(udc); |
| 1795 | |
| 1796 | udc->usb_state = USB_STATE_ATTACHED; |
| 1797 | } |
| 1798 | } |
| 1799 | |
| 1800 | static void handle_bus_resume(struct mv_udc *udc) |
| 1801 | { |
| 1802 | udc->usb_state = udc->resume_state; |
| 1803 | udc->resume_state = 0; |
| 1804 | |
| 1805 | /* report resume to the driver */ |
| 1806 | if (udc->driver) { |
| 1807 | if (udc->driver->resume) { |
| 1808 | spin_unlock(&udc->lock); |
| 1809 | udc->driver->resume(&udc->gadget); |
| 1810 | spin_lock(&udc->lock); |
| 1811 | } |
| 1812 | } |
| 1813 | } |
| 1814 | |
| 1815 | static void irq_process_suspend(struct mv_udc *udc) |
| 1816 | { |
| 1817 | udc->resume_state = udc->usb_state; |
| 1818 | udc->usb_state = USB_STATE_SUSPENDED; |
| 1819 | |
| 1820 | if (udc->driver->suspend) { |
| 1821 | spin_unlock(&udc->lock); |
| 1822 | udc->driver->suspend(&udc->gadget); |
| 1823 | spin_lock(&udc->lock); |
| 1824 | } |
| 1825 | } |
| 1826 | |
| 1827 | static void irq_process_port_change(struct mv_udc *udc) |
| 1828 | { |
| 1829 | u32 portsc; |
| 1830 | |
| 1831 | portsc = readl(&udc->op_regs->portsc[0]); |
| 1832 | if (!(portsc & PORTSCX_PORT_RESET)) { |
| 1833 | /* Get the speed */ |
| 1834 | u32 speed = portsc & PORTSCX_PORT_SPEED_MASK; |
| 1835 | switch (speed) { |
| 1836 | case PORTSCX_PORT_SPEED_HIGH: |
| 1837 | udc->gadget.speed = USB_SPEED_HIGH; |
| 1838 | break; |
| 1839 | case PORTSCX_PORT_SPEED_FULL: |
| 1840 | udc->gadget.speed = USB_SPEED_FULL; |
| 1841 | break; |
| 1842 | case PORTSCX_PORT_SPEED_LOW: |
| 1843 | udc->gadget.speed = USB_SPEED_LOW; |
| 1844 | break; |
| 1845 | default: |
| 1846 | udc->gadget.speed = USB_SPEED_UNKNOWN; |
| 1847 | break; |
| 1848 | } |
| 1849 | } |
| 1850 | |
| 1851 | if (portsc & PORTSCX_PORT_SUSPEND) { |
| 1852 | udc->resume_state = udc->usb_state; |
| 1853 | udc->usb_state = USB_STATE_SUSPENDED; |
| 1854 | if (udc->driver->suspend) { |
| 1855 | spin_unlock(&udc->lock); |
| 1856 | udc->driver->suspend(&udc->gadget); |
| 1857 | spin_lock(&udc->lock); |
| 1858 | } |
| 1859 | } |
| 1860 | |
| 1861 | if (!(portsc & PORTSCX_PORT_SUSPEND) |
| 1862 | && udc->usb_state == USB_STATE_SUSPENDED) { |
| 1863 | handle_bus_resume(udc); |
| 1864 | } |
| 1865 | |
| 1866 | if (!udc->resume_state) |
| 1867 | udc->usb_state = USB_STATE_DEFAULT; |
| 1868 | } |
| 1869 | |
| 1870 | static void irq_process_error(struct mv_udc *udc) |
| 1871 | { |
| 1872 | /* Increment the error count */ |
| 1873 | udc->errors++; |
| 1874 | } |
| 1875 | |
| 1876 | static irqreturn_t mv_udc_irq(int irq, void *dev) |
| 1877 | { |
| 1878 | struct mv_udc *udc = (struct mv_udc *)dev; |
| 1879 | u32 status, intr; |
| 1880 | |
| 1881 | spin_lock(&udc->lock); |
| 1882 | |
| 1883 | status = readl(&udc->op_regs->usbsts); |
| 1884 | intr = readl(&udc->op_regs->usbintr); |
| 1885 | status &= intr; |
| 1886 | |
| 1887 | if (status == 0) { |
| 1888 | spin_unlock(&udc->lock); |
| 1889 | return IRQ_NONE; |
| 1890 | } |
| 1891 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1892 | /* Clear all the interrupts occurred */ |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1893 | writel(status, &udc->op_regs->usbsts); |
| 1894 | |
| 1895 | if (status & USBSTS_ERR) |
| 1896 | irq_process_error(udc); |
| 1897 | |
| 1898 | if (status & USBSTS_RESET) |
| 1899 | irq_process_reset(udc); |
| 1900 | |
| 1901 | if (status & USBSTS_PORT_CHANGE) |
| 1902 | irq_process_port_change(udc); |
| 1903 | |
| 1904 | if (status & USBSTS_INT) |
| 1905 | irq_process_tr_complete(udc); |
| 1906 | |
| 1907 | if (status & USBSTS_SUSPEND) |
| 1908 | irq_process_suspend(udc); |
| 1909 | |
| 1910 | spin_unlock(&udc->lock); |
| 1911 | |
| 1912 | return IRQ_HANDLED; |
| 1913 | } |
| 1914 | |
| 1915 | /* release device structure */ |
| 1916 | static void gadget_release(struct device *_dev) |
| 1917 | { |
| 1918 | struct mv_udc *udc = the_controller; |
| 1919 | |
| 1920 | complete(udc->done); |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1921 | } |
| 1922 | |
Neil Zhang | 5d0b8d0 | 2011-10-12 16:49:25 +0800 | [diff] [blame] | 1923 | static int __devexit mv_udc_remove(struct platform_device *dev) |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1924 | { |
| 1925 | struct mv_udc *udc = the_controller; |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 1926 | int clk_i; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1927 | |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 1928 | usb_del_gadget_udc(&udc->gadget); |
| 1929 | |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1930 | /* free memory allocated in probe */ |
| 1931 | if (udc->dtd_pool) |
| 1932 | dma_pool_destroy(udc->dtd_pool); |
| 1933 | |
| 1934 | if (udc->ep_dqh) |
| 1935 | dma_free_coherent(&dev->dev, udc->ep_dqh_size, |
| 1936 | udc->ep_dqh, udc->ep_dqh_dma); |
| 1937 | |
| 1938 | kfree(udc->eps); |
| 1939 | |
| 1940 | if (udc->irq) |
| 1941 | free_irq(udc->irq, &dev->dev); |
| 1942 | |
| 1943 | if (udc->cap_regs) |
| 1944 | iounmap(udc->cap_regs); |
| 1945 | udc->cap_regs = NULL; |
| 1946 | |
| 1947 | if (udc->phy_regs) |
| 1948 | iounmap((void *)udc->phy_regs); |
| 1949 | udc->phy_regs = 0; |
| 1950 | |
| 1951 | if (udc->status_req) { |
| 1952 | kfree(udc->status_req->req.buf); |
| 1953 | kfree(udc->status_req); |
| 1954 | } |
| 1955 | |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 1956 | for (clk_i = 0; clk_i <= udc->clknum; clk_i++) |
| 1957 | clk_put(udc->clk[clk_i]); |
| 1958 | |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1959 | device_unregister(&udc->gadget.dev); |
| 1960 | |
| 1961 | /* free dev, wait for the release() finished */ |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 1962 | wait_for_completion(udc->done); |
| 1963 | kfree(udc); |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1964 | |
| 1965 | the_controller = NULL; |
| 1966 | |
| 1967 | return 0; |
| 1968 | } |
| 1969 | |
Neil Zhang | 5d0b8d0 | 2011-10-12 16:49:25 +0800 | [diff] [blame] | 1970 | static int __devinit mv_udc_probe(struct platform_device *dev) |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1971 | { |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 1972 | struct mv_usb_platform_data *pdata = dev->dev.platform_data; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1973 | struct mv_udc *udc; |
| 1974 | int retval = 0; |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 1975 | int clk_i = 0; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1976 | struct resource *r; |
| 1977 | size_t size; |
| 1978 | |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 1979 | if (pdata == NULL) { |
| 1980 | dev_err(&dev->dev, "missing platform_data\n"); |
| 1981 | return -ENODEV; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1982 | } |
| 1983 | |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 1984 | size = sizeof(*udc) + sizeof(struct clk *) * pdata->clknum; |
| 1985 | udc = kzalloc(size, GFP_KERNEL); |
| 1986 | if (udc == NULL) { |
| 1987 | dev_err(&dev->dev, "failed to allocate memory for udc\n"); |
| 1988 | return -ENOMEM; |
| 1989 | } |
| 1990 | |
| 1991 | the_controller = udc; |
| 1992 | udc->done = &release_done; |
| 1993 | udc->pdata = dev->dev.platform_data; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 1994 | spin_lock_init(&udc->lock); |
| 1995 | |
| 1996 | udc->dev = dev; |
| 1997 | |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 1998 | udc->clknum = pdata->clknum; |
| 1999 | for (clk_i = 0; clk_i < udc->clknum; clk_i++) { |
| 2000 | udc->clk[clk_i] = clk_get(&dev->dev, pdata->clkname[clk_i]); |
| 2001 | if (IS_ERR(udc->clk[clk_i])) { |
| 2002 | retval = PTR_ERR(udc->clk[clk_i]); |
| 2003 | goto err_put_clk; |
| 2004 | } |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2005 | } |
| 2006 | |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2007 | r = platform_get_resource_byname(udc->dev, IORESOURCE_MEM, "capregs"); |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2008 | if (r == NULL) { |
| 2009 | dev_err(&dev->dev, "no I/O memory resource defined\n"); |
| 2010 | retval = -ENODEV; |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2011 | goto err_put_clk; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2012 | } |
| 2013 | |
| 2014 | udc->cap_regs = (struct mv_cap_regs __iomem *) |
| 2015 | ioremap(r->start, resource_size(r)); |
| 2016 | if (udc->cap_regs == NULL) { |
| 2017 | dev_err(&dev->dev, "failed to map I/O memory\n"); |
| 2018 | retval = -EBUSY; |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2019 | goto err_put_clk; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2020 | } |
| 2021 | |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2022 | r = platform_get_resource_byname(udc->dev, IORESOURCE_MEM, "phyregs"); |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2023 | if (r == NULL) { |
| 2024 | dev_err(&dev->dev, "no phy I/O memory resource defined\n"); |
| 2025 | retval = -ENODEV; |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2026 | goto err_iounmap_capreg; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2027 | } |
| 2028 | |
| 2029 | udc->phy_regs = (unsigned int)ioremap(r->start, resource_size(r)); |
| 2030 | if (udc->phy_regs == 0) { |
| 2031 | dev_err(&dev->dev, "failed to map phy I/O memory\n"); |
| 2032 | retval = -EBUSY; |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2033 | goto err_iounmap_capreg; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2034 | } |
| 2035 | |
| 2036 | /* we will acces controller register, so enable the clk */ |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2037 | udc_clock_enable(udc); |
| 2038 | if (pdata->phy_init) { |
| 2039 | retval = pdata->phy_init(udc->phy_regs); |
| 2040 | if (retval) { |
| 2041 | dev_err(&dev->dev, "phy init error %d\n", retval); |
| 2042 | goto err_iounmap_phyreg; |
| 2043 | } |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2044 | } |
| 2045 | |
| 2046 | udc->op_regs = (struct mv_op_regs __iomem *)((u32)udc->cap_regs |
| 2047 | + (readl(&udc->cap_regs->caplength_hciversion) |
| 2048 | & CAPLENGTH_MASK)); |
| 2049 | udc->max_eps = readl(&udc->cap_regs->dccparams) & DCCPARAMS_DEN_MASK; |
| 2050 | |
Neil Zhang | 4540a9ab | 2011-10-12 16:49:26 +0800 | [diff] [blame] | 2051 | /* |
| 2052 | * some platform will use usb to download image, it may not disconnect |
| 2053 | * usb gadget before loading kernel. So first stop udc here. |
| 2054 | */ |
| 2055 | udc_stop(udc); |
| 2056 | writel(0xFFFFFFFF, &udc->op_regs->usbsts); |
| 2057 | |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2058 | size = udc->max_eps * sizeof(struct mv_dqh) *2; |
| 2059 | size = (size + DQH_ALIGNMENT - 1) & ~(DQH_ALIGNMENT - 1); |
| 2060 | udc->ep_dqh = dma_alloc_coherent(&dev->dev, size, |
| 2061 | &udc->ep_dqh_dma, GFP_KERNEL); |
| 2062 | |
| 2063 | if (udc->ep_dqh == NULL) { |
| 2064 | dev_err(&dev->dev, "allocate dQH memory failed\n"); |
| 2065 | retval = -ENOMEM; |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2066 | goto err_disable_clock; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2067 | } |
| 2068 | udc->ep_dqh_size = size; |
| 2069 | |
| 2070 | /* create dTD dma_pool resource */ |
| 2071 | udc->dtd_pool = dma_pool_create("mv_dtd", |
| 2072 | &dev->dev, |
| 2073 | sizeof(struct mv_dtd), |
| 2074 | DTD_ALIGNMENT, |
| 2075 | DMA_BOUNDARY); |
| 2076 | |
| 2077 | if (!udc->dtd_pool) { |
| 2078 | retval = -ENOMEM; |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2079 | goto err_free_dma; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2080 | } |
| 2081 | |
| 2082 | size = udc->max_eps * sizeof(struct mv_ep) *2; |
| 2083 | udc->eps = kzalloc(size, GFP_KERNEL); |
| 2084 | if (udc->eps == NULL) { |
| 2085 | dev_err(&dev->dev, "allocate ep memory failed\n"); |
| 2086 | retval = -ENOMEM; |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2087 | goto err_destroy_dma; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2088 | } |
| 2089 | |
| 2090 | /* initialize ep0 status request structure */ |
| 2091 | udc->status_req = kzalloc(sizeof(struct mv_req), GFP_KERNEL); |
| 2092 | if (!udc->status_req) { |
| 2093 | dev_err(&dev->dev, "allocate status_req memory failed\n"); |
| 2094 | retval = -ENOMEM; |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2095 | goto err_free_eps; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2096 | } |
| 2097 | INIT_LIST_HEAD(&udc->status_req->queue); |
| 2098 | |
| 2099 | /* allocate a small amount of memory to get valid address */ |
| 2100 | udc->status_req->req.buf = kzalloc(8, GFP_KERNEL); |
| 2101 | udc->status_req->req.dma = virt_to_phys(udc->status_req->req.buf); |
| 2102 | |
| 2103 | udc->resume_state = USB_STATE_NOTATTACHED; |
| 2104 | udc->usb_state = USB_STATE_POWERED; |
| 2105 | udc->ep0_dir = EP_DIR_OUT; |
| 2106 | udc->remote_wakeup = 0; |
| 2107 | |
| 2108 | r = platform_get_resource(udc->dev, IORESOURCE_IRQ, 0); |
| 2109 | if (r == NULL) { |
| 2110 | dev_err(&dev->dev, "no IRQ resource defined\n"); |
| 2111 | retval = -ENODEV; |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2112 | goto err_free_status_req; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2113 | } |
| 2114 | udc->irq = r->start; |
| 2115 | if (request_irq(udc->irq, mv_udc_irq, |
Yong Zhang | b5dd18d | 2011-09-07 16:10:52 +0800 | [diff] [blame] | 2116 | IRQF_SHARED, driver_name, udc)) { |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2117 | dev_err(&dev->dev, "Request irq %d for UDC failed\n", |
| 2118 | udc->irq); |
| 2119 | retval = -ENODEV; |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2120 | goto err_free_status_req; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2121 | } |
| 2122 | |
| 2123 | /* initialize gadget structure */ |
| 2124 | udc->gadget.ops = &mv_ops; /* usb_gadget_ops */ |
| 2125 | udc->gadget.ep0 = &udc->eps[0].ep; /* gadget ep0 */ |
| 2126 | INIT_LIST_HEAD(&udc->gadget.ep_list); /* ep_list */ |
| 2127 | udc->gadget.speed = USB_SPEED_UNKNOWN; /* speed */ |
| 2128 | udc->gadget.is_dualspeed = 1; /* support dual speed */ |
| 2129 | |
| 2130 | /* the "gadget" abstracts/virtualizes the controller */ |
| 2131 | dev_set_name(&udc->gadget.dev, "gadget"); |
| 2132 | udc->gadget.dev.parent = &dev->dev; |
| 2133 | udc->gadget.dev.dma_mask = dev->dev.dma_mask; |
| 2134 | udc->gadget.dev.release = gadget_release; |
| 2135 | udc->gadget.name = driver_name; /* gadget name */ |
| 2136 | |
| 2137 | retval = device_register(&udc->gadget.dev); |
| 2138 | if (retval) |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2139 | goto err_free_irq; |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2140 | |
| 2141 | eps_init(udc); |
| 2142 | |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 2143 | retval = usb_add_gadget_udc(&dev->dev, &udc->gadget); |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2144 | if (retval) |
| 2145 | goto err_unregister; |
| 2146 | |
| 2147 | return 0; |
| 2148 | |
| 2149 | err_unregister: |
| 2150 | device_unregister(&udc->gadget.dev); |
| 2151 | err_free_irq: |
| 2152 | free_irq(udc->irq, &dev->dev); |
| 2153 | err_free_status_req: |
| 2154 | kfree(udc->status_req->req.buf); |
| 2155 | kfree(udc->status_req); |
| 2156 | err_free_eps: |
| 2157 | kfree(udc->eps); |
| 2158 | err_destroy_dma: |
| 2159 | dma_pool_destroy(udc->dtd_pool); |
| 2160 | err_free_dma: |
| 2161 | dma_free_coherent(&dev->dev, udc->ep_dqh_size, |
| 2162 | udc->ep_dqh, udc->ep_dqh_dma); |
| 2163 | err_disable_clock: |
| 2164 | if (udc->pdata->phy_deinit) |
| 2165 | udc->pdata->phy_deinit(udc->phy_regs); |
| 2166 | udc_clock_disable(udc); |
| 2167 | err_iounmap_phyreg: |
| 2168 | iounmap((void *)udc->phy_regs); |
| 2169 | err_iounmap_capreg: |
| 2170 | iounmap(udc->cap_regs); |
| 2171 | err_put_clk: |
| 2172 | for (clk_i--; clk_i >= 0; clk_i--) |
| 2173 | clk_put(udc->clk[clk_i]); |
| 2174 | the_controller = NULL; |
| 2175 | kfree(udc); |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2176 | return retval; |
| 2177 | } |
| 2178 | |
| 2179 | #ifdef CONFIG_PM |
Sebastian Andrzej Siewior | cb42447 | 2011-06-03 19:50:45 +0200 | [diff] [blame] | 2180 | static int mv_udc_suspend(struct device *_dev) |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2181 | { |
| 2182 | struct mv_udc *udc = the_controller; |
| 2183 | |
| 2184 | udc_stop(udc); |
| 2185 | |
| 2186 | return 0; |
| 2187 | } |
| 2188 | |
Sebastian Andrzej Siewior | cb42447 | 2011-06-03 19:50:45 +0200 | [diff] [blame] | 2189 | static int mv_udc_resume(struct device *_dev) |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2190 | { |
| 2191 | struct mv_udc *udc = the_controller; |
| 2192 | int retval; |
| 2193 | |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2194 | if (udc->pdata->phy_init) { |
| 2195 | retval = udc->pdata->phy_init(udc->phy_regs); |
| 2196 | if (retval) { |
| 2197 | dev_err(&udc->dev->dev, |
| 2198 | "init phy error %d when resume back\n", |
| 2199 | retval); |
| 2200 | return retval; |
| 2201 | } |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2202 | } |
Neil Zhang | dde34cc | 2011-10-12 16:49:24 +0800 | [diff] [blame] | 2203 | |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2204 | udc_reset(udc); |
| 2205 | ep0_reset(udc); |
| 2206 | udc_start(udc); |
| 2207 | |
| 2208 | return 0; |
| 2209 | } |
| 2210 | |
| 2211 | static const struct dev_pm_ops mv_udc_pm_ops = { |
| 2212 | .suspend = mv_udc_suspend, |
| 2213 | .resume = mv_udc_resume, |
| 2214 | }; |
| 2215 | #endif |
| 2216 | |
| 2217 | static struct platform_driver udc_driver = { |
| 2218 | .probe = mv_udc_probe, |
| 2219 | .remove = __exit_p(mv_udc_remove), |
| 2220 | .driver = { |
| 2221 | .owner = THIS_MODULE, |
| 2222 | .name = "pxa-u2o", |
| 2223 | #ifdef CONFIG_PM |
Sebastian Andrzej Siewior | cb42447 | 2011-06-03 19:50:45 +0200 | [diff] [blame] | 2224 | .pm = &mv_udc_pm_ops, |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2225 | #endif |
| 2226 | }, |
| 2227 | }; |
Sebastian Andrzej Siewior | 86081d7 | 2011-06-29 16:41:55 +0300 | [diff] [blame] | 2228 | MODULE_ALIAS("platform:pxa-u2o"); |
cxie4 | e7cddda | 2010-11-30 13:35:15 +0800 | [diff] [blame] | 2229 | |
| 2230 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 2231 | MODULE_AUTHOR("Chao Xie <chao.xie@marvell.com>"); |
| 2232 | MODULE_VERSION(DRIVER_VERSION); |
| 2233 | MODULE_LICENSE("GPL"); |
| 2234 | |
| 2235 | |
| 2236 | static int __init init(void) |
| 2237 | { |
| 2238 | return platform_driver_register(&udc_driver); |
| 2239 | } |
| 2240 | module_init(init); |
| 2241 | |
| 2242 | |
| 2243 | static void __exit cleanup(void) |
| 2244 | { |
| 2245 | platform_driver_unregister(&udc_driver); |
| 2246 | } |
| 2247 | module_exit(cleanup); |
| 2248 | |