Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 Marvell International Ltd. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/module.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> |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 18 | #include <linux/timer.h> |
| 19 | #include <linux/list.h> |
| 20 | #include <linux/notifier.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/pm.h> |
| 27 | #include <linux/io.h> |
| 28 | #include <linux/irq.h> |
| 29 | #include <linux/platform_device.h> |
| 30 | #include <linux/platform_data/mv_usb.h> |
| 31 | #include <linux/clk.h> |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 32 | |
| 33 | #include "mv_u3d.h" |
| 34 | |
| 35 | #define DRIVER_DESC "Marvell PXA USB3.0 Device Controller driver" |
| 36 | |
| 37 | static const char driver_name[] = "mv_u3d"; |
| 38 | static const char driver_desc[] = DRIVER_DESC; |
| 39 | |
| 40 | static void mv_u3d_nuke(struct mv_u3d_ep *ep, int status); |
| 41 | static void mv_u3d_stop_activity(struct mv_u3d *u3d, |
| 42 | struct usb_gadget_driver *driver); |
| 43 | |
| 44 | /* for endpoint 0 operations */ |
| 45 | static const struct usb_endpoint_descriptor mv_u3d_ep0_desc = { |
| 46 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 47 | .bDescriptorType = USB_DT_ENDPOINT, |
| 48 | .bEndpointAddress = 0, |
| 49 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, |
| 50 | .wMaxPacketSize = MV_U3D_EP0_MAX_PKT_SIZE, |
| 51 | }; |
| 52 | |
| 53 | static void mv_u3d_ep0_reset(struct mv_u3d *u3d) |
| 54 | { |
| 55 | struct mv_u3d_ep *ep; |
| 56 | u32 epxcr; |
| 57 | int i; |
| 58 | |
| 59 | for (i = 0; i < 2; i++) { |
| 60 | ep = &u3d->eps[i]; |
| 61 | ep->u3d = u3d; |
| 62 | |
| 63 | /* ep0 ep context, ep0 in and out share the same ep context */ |
| 64 | ep->ep_context = &u3d->ep_context[1]; |
| 65 | } |
| 66 | |
| 67 | /* reset ep state machine */ |
| 68 | /* reset ep0 out */ |
| 69 | epxcr = ioread32(&u3d->vuc_regs->epcr[0].epxoutcr0); |
| 70 | epxcr |= MV_U3D_EPXCR_EP_INIT; |
| 71 | iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxoutcr0); |
| 72 | udelay(5); |
| 73 | epxcr &= ~MV_U3D_EPXCR_EP_INIT; |
| 74 | iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxoutcr0); |
| 75 | |
| 76 | epxcr = ((MV_U3D_EP0_MAX_PKT_SIZE |
| 77 | << MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT) |
| 78 | | (1 << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT) |
| 79 | | (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT) |
| 80 | | MV_U3D_EPXCR_EP_TYPE_CONTROL); |
| 81 | iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxoutcr1); |
| 82 | |
| 83 | /* reset ep0 in */ |
| 84 | epxcr = ioread32(&u3d->vuc_regs->epcr[0].epxincr0); |
| 85 | epxcr |= MV_U3D_EPXCR_EP_INIT; |
| 86 | iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxincr0); |
| 87 | udelay(5); |
| 88 | epxcr &= ~MV_U3D_EPXCR_EP_INIT; |
| 89 | iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxincr0); |
| 90 | |
| 91 | epxcr = ((MV_U3D_EP0_MAX_PKT_SIZE |
| 92 | << MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT) |
| 93 | | (1 << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT) |
| 94 | | (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT) |
| 95 | | MV_U3D_EPXCR_EP_TYPE_CONTROL); |
| 96 | iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxincr1); |
| 97 | } |
| 98 | |
| 99 | static void mv_u3d_ep0_stall(struct mv_u3d *u3d) |
| 100 | { |
| 101 | u32 tmp; |
| 102 | dev_dbg(u3d->dev, "%s\n", __func__); |
| 103 | |
| 104 | /* set TX and RX to stall */ |
| 105 | tmp = ioread32(&u3d->vuc_regs->epcr[0].epxoutcr0); |
| 106 | tmp |= MV_U3D_EPXCR_EP_HALT; |
| 107 | iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxoutcr0); |
| 108 | |
| 109 | tmp = ioread32(&u3d->vuc_regs->epcr[0].epxincr0); |
| 110 | tmp |= MV_U3D_EPXCR_EP_HALT; |
| 111 | iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxincr0); |
| 112 | |
| 113 | /* update ep0 state */ |
| 114 | u3d->ep0_state = MV_U3D_WAIT_FOR_SETUP; |
| 115 | u3d->ep0_dir = MV_U3D_EP_DIR_OUT; |
| 116 | } |
| 117 | |
| 118 | static int mv_u3d_process_ep_req(struct mv_u3d *u3d, int index, |
| 119 | struct mv_u3d_req *curr_req) |
| 120 | { |
| 121 | struct mv_u3d_trb *curr_trb; |
| 122 | dma_addr_t cur_deq_lo; |
| 123 | struct mv_u3d_ep_context *curr_ep_context; |
Felipe Balbi | e6667ef | 2013-03-22 09:14:25 +0200 | [diff] [blame] | 124 | int trb_complete, actual, remaining_length = 0; |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 125 | int direction, ep_num; |
| 126 | int retval = 0; |
| 127 | u32 tmp, status, length; |
| 128 | |
| 129 | curr_ep_context = &u3d->ep_context[index]; |
| 130 | direction = index % 2; |
| 131 | ep_num = index / 2; |
| 132 | |
| 133 | trb_complete = 0; |
| 134 | actual = curr_req->req.length; |
| 135 | |
| 136 | while (!list_empty(&curr_req->trb_list)) { |
| 137 | curr_trb = list_entry(curr_req->trb_list.next, |
| 138 | struct mv_u3d_trb, trb_list); |
| 139 | if (!curr_trb->trb_hw->ctrl.own) { |
| 140 | dev_err(u3d->dev, "%s, TRB own error!\n", |
| 141 | u3d->eps[index].name); |
| 142 | return 1; |
| 143 | } |
| 144 | |
| 145 | curr_trb->trb_hw->ctrl.own = 0; |
| 146 | if (direction == MV_U3D_EP_DIR_OUT) { |
| 147 | tmp = ioread32(&u3d->vuc_regs->rxst[ep_num].statuslo); |
| 148 | cur_deq_lo = |
| 149 | ioread32(&u3d->vuc_regs->rxst[ep_num].curdeqlo); |
| 150 | } else { |
| 151 | tmp = ioread32(&u3d->vuc_regs->txst[ep_num].statuslo); |
| 152 | cur_deq_lo = |
| 153 | ioread32(&u3d->vuc_regs->txst[ep_num].curdeqlo); |
| 154 | } |
| 155 | |
| 156 | status = tmp >> MV_U3D_XFERSTATUS_COMPLETE_SHIFT; |
| 157 | length = tmp & MV_U3D_XFERSTATUS_TRB_LENGTH_MASK; |
| 158 | |
| 159 | if (status == MV_U3D_COMPLETE_SUCCESS || |
| 160 | (status == MV_U3D_COMPLETE_SHORT_PACKET && |
| 161 | direction == MV_U3D_EP_DIR_OUT)) { |
| 162 | remaining_length += length; |
| 163 | actual -= remaining_length; |
| 164 | } else { |
| 165 | dev_err(u3d->dev, |
| 166 | "complete_tr error: ep=%d %s: error = 0x%x\n", |
| 167 | index >> 1, direction ? "SEND" : "RECV", |
| 168 | status); |
| 169 | retval = -EPROTO; |
| 170 | } |
| 171 | |
| 172 | list_del_init(&curr_trb->trb_list); |
| 173 | } |
| 174 | if (retval) |
| 175 | return retval; |
| 176 | |
| 177 | curr_req->req.actual = actual; |
| 178 | return 0; |
| 179 | } |
| 180 | |
| 181 | /* |
| 182 | * mv_u3d_done() - retire a request; caller blocked irqs |
| 183 | * @status : request status to be set, only works when |
| 184 | * request is still in progress. |
| 185 | */ |
| 186 | static |
| 187 | void mv_u3d_done(struct mv_u3d_ep *ep, struct mv_u3d_req *req, int status) |
Felipe Balbi | 6fbb2f7 | 2013-03-22 17:01:42 +0200 | [diff] [blame] | 188 | __releases(&ep->udc->lock) |
| 189 | __acquires(&ep->udc->lock) |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 190 | { |
| 191 | struct mv_u3d *u3d = (struct mv_u3d *)ep->u3d; |
| 192 | |
| 193 | dev_dbg(u3d->dev, "mv_u3d_done: remove req->queue\n"); |
| 194 | /* Removed the req from ep queue */ |
| 195 | list_del_init(&req->queue); |
| 196 | |
| 197 | /* req.status should be set as -EINPROGRESS in ep_queue() */ |
| 198 | if (req->req.status == -EINPROGRESS) |
| 199 | req->req.status = status; |
| 200 | else |
| 201 | status = req->req.status; |
| 202 | |
| 203 | /* Free trb for the request */ |
| 204 | if (!req->chain) |
| 205 | dma_pool_free(u3d->trb_pool, |
| 206 | req->trb_head->trb_hw, req->trb_head->trb_dma); |
| 207 | else { |
| 208 | dma_unmap_single(ep->u3d->gadget.dev.parent, |
| 209 | (dma_addr_t)req->trb_head->trb_dma, |
| 210 | req->trb_count * sizeof(struct mv_u3d_trb_hw), |
| 211 | DMA_BIDIRECTIONAL); |
| 212 | kfree(req->trb_head->trb_hw); |
| 213 | } |
| 214 | kfree(req->trb_head); |
| 215 | |
| 216 | usb_gadget_unmap_request(&u3d->gadget, &req->req, mv_u3d_ep_dir(ep)); |
| 217 | |
| 218 | if (status && (status != -ESHUTDOWN)) { |
| 219 | dev_dbg(u3d->dev, "complete %s req %p stat %d len %u/%u", |
| 220 | ep->ep.name, &req->req, status, |
| 221 | req->req.actual, req->req.length); |
| 222 | } |
| 223 | |
| 224 | spin_unlock(&ep->u3d->lock); |
Michal Sojka | 304f7e5 | 2014-09-24 22:43:19 +0200 | [diff] [blame] | 225 | |
| 226 | usb_gadget_giveback_request(&ep->ep, &req->req); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 227 | |
| 228 | spin_lock(&ep->u3d->lock); |
| 229 | } |
| 230 | |
| 231 | static int mv_u3d_queue_trb(struct mv_u3d_ep *ep, struct mv_u3d_req *req) |
| 232 | { |
| 233 | u32 tmp, direction; |
| 234 | struct mv_u3d *u3d; |
| 235 | struct mv_u3d_ep_context *ep_context; |
| 236 | int retval = 0; |
| 237 | |
| 238 | u3d = ep->u3d; |
| 239 | direction = mv_u3d_ep_dir(ep); |
| 240 | |
| 241 | /* ep0 in and out share the same ep context slot 1*/ |
| 242 | if (ep->ep_num == 0) |
| 243 | ep_context = &(u3d->ep_context[1]); |
| 244 | else |
| 245 | ep_context = &(u3d->ep_context[ep->ep_num * 2 + direction]); |
| 246 | |
| 247 | /* check if the pipe is empty or not */ |
| 248 | if (!list_empty(&ep->queue)) { |
| 249 | dev_err(u3d->dev, "add trb to non-empty queue!\n"); |
| 250 | retval = -ENOMEM; |
| 251 | WARN_ON(1); |
| 252 | } else { |
| 253 | ep_context->rsvd0 = cpu_to_le32(1); |
| 254 | ep_context->rsvd1 = 0; |
| 255 | |
| 256 | /* Configure the trb address and set the DCS bit. |
| 257 | * Both DCS bit and own bit in trb should be set. |
| 258 | */ |
| 259 | ep_context->trb_addr_lo = |
| 260 | cpu_to_le32(req->trb_head->trb_dma | DCS_ENABLE); |
| 261 | ep_context->trb_addr_hi = 0; |
| 262 | |
| 263 | /* Ensure that updates to the EP Context will |
| 264 | * occure before Ring Bell. |
| 265 | */ |
| 266 | wmb(); |
| 267 | |
| 268 | /* ring bell the ep */ |
| 269 | if (ep->ep_num == 0) |
| 270 | tmp = 0x1; |
| 271 | else |
| 272 | tmp = ep->ep_num * 2 |
| 273 | + ((direction == MV_U3D_EP_DIR_OUT) ? 0 : 1); |
| 274 | |
| 275 | iowrite32(tmp, &u3d->op_regs->doorbell); |
| 276 | } |
| 277 | return retval; |
| 278 | } |
| 279 | |
| 280 | static struct mv_u3d_trb *mv_u3d_build_trb_one(struct mv_u3d_req *req, |
| 281 | unsigned *length, dma_addr_t *dma) |
| 282 | { |
| 283 | u32 temp; |
| 284 | unsigned int direction; |
| 285 | struct mv_u3d_trb *trb; |
| 286 | struct mv_u3d_trb_hw *trb_hw; |
| 287 | struct mv_u3d *u3d; |
| 288 | |
| 289 | /* how big will this transfer be? */ |
| 290 | *length = req->req.length - req->req.actual; |
| 291 | BUG_ON(*length > (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER); |
| 292 | |
| 293 | u3d = req->ep->u3d; |
| 294 | |
| 295 | trb = kzalloc(sizeof(*trb), GFP_ATOMIC); |
Jingoo Han | f3772c2 | 2014-05-07 15:48:13 +0900 | [diff] [blame] | 296 | if (!trb) |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 297 | return NULL; |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 298 | |
| 299 | /* |
| 300 | * Be careful that no _GFP_HIGHMEM is set, |
| 301 | * or we can not use dma_to_virt |
| 302 | * cannot use GFP_KERNEL in spin lock |
| 303 | */ |
| 304 | trb_hw = dma_pool_alloc(u3d->trb_pool, GFP_ATOMIC, dma); |
| 305 | if (!trb_hw) { |
Valentin Ilie | f51a08d | 2013-09-21 12:30:15 +0300 | [diff] [blame] | 306 | kfree(trb); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 307 | dev_err(u3d->dev, |
| 308 | "%s, dma_pool_alloc fail\n", __func__); |
| 309 | return NULL; |
| 310 | } |
| 311 | trb->trb_dma = *dma; |
| 312 | trb->trb_hw = trb_hw; |
| 313 | |
| 314 | /* initialize buffer page pointers */ |
| 315 | temp = (u32)(req->req.dma + req->req.actual); |
| 316 | |
| 317 | trb_hw->buf_addr_lo = cpu_to_le32(temp); |
| 318 | trb_hw->buf_addr_hi = 0; |
| 319 | trb_hw->trb_len = cpu_to_le32(*length); |
| 320 | trb_hw->ctrl.own = 1; |
| 321 | |
| 322 | if (req->ep->ep_num == 0) |
| 323 | trb_hw->ctrl.type = TYPE_DATA; |
| 324 | else |
| 325 | trb_hw->ctrl.type = TYPE_NORMAL; |
| 326 | |
| 327 | req->req.actual += *length; |
| 328 | |
| 329 | direction = mv_u3d_ep_dir(req->ep); |
| 330 | if (direction == MV_U3D_EP_DIR_IN) |
| 331 | trb_hw->ctrl.dir = 1; |
| 332 | else |
| 333 | trb_hw->ctrl.dir = 0; |
| 334 | |
| 335 | /* Enable interrupt for the last trb of a request */ |
| 336 | if (!req->req.no_interrupt) |
| 337 | trb_hw->ctrl.ioc = 1; |
| 338 | |
| 339 | trb_hw->ctrl.chain = 0; |
| 340 | |
| 341 | wmb(); |
| 342 | return trb; |
| 343 | } |
| 344 | |
| 345 | static int mv_u3d_build_trb_chain(struct mv_u3d_req *req, unsigned *length, |
| 346 | struct mv_u3d_trb *trb, int *is_last) |
| 347 | { |
| 348 | u32 temp; |
| 349 | unsigned int direction; |
| 350 | struct mv_u3d *u3d; |
| 351 | |
| 352 | /* how big will this transfer be? */ |
| 353 | *length = min(req->req.length - req->req.actual, |
| 354 | (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER); |
| 355 | |
| 356 | u3d = req->ep->u3d; |
| 357 | |
| 358 | trb->trb_dma = 0; |
| 359 | |
| 360 | /* initialize buffer page pointers */ |
| 361 | temp = (u32)(req->req.dma + req->req.actual); |
| 362 | |
| 363 | trb->trb_hw->buf_addr_lo = cpu_to_le32(temp); |
| 364 | trb->trb_hw->buf_addr_hi = 0; |
| 365 | trb->trb_hw->trb_len = cpu_to_le32(*length); |
| 366 | trb->trb_hw->ctrl.own = 1; |
| 367 | |
| 368 | if (req->ep->ep_num == 0) |
| 369 | trb->trb_hw->ctrl.type = TYPE_DATA; |
| 370 | else |
| 371 | trb->trb_hw->ctrl.type = TYPE_NORMAL; |
| 372 | |
| 373 | req->req.actual += *length; |
| 374 | |
| 375 | direction = mv_u3d_ep_dir(req->ep); |
| 376 | if (direction == MV_U3D_EP_DIR_IN) |
| 377 | trb->trb_hw->ctrl.dir = 1; |
| 378 | else |
| 379 | trb->trb_hw->ctrl.dir = 0; |
| 380 | |
| 381 | /* zlp is needed if req->req.zero is set */ |
| 382 | if (req->req.zero) { |
| 383 | if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0) |
| 384 | *is_last = 1; |
| 385 | else |
| 386 | *is_last = 0; |
| 387 | } else if (req->req.length == req->req.actual) |
| 388 | *is_last = 1; |
| 389 | else |
| 390 | *is_last = 0; |
| 391 | |
| 392 | /* Enable interrupt for the last trb of a request */ |
| 393 | if (*is_last && !req->req.no_interrupt) |
| 394 | trb->trb_hw->ctrl.ioc = 1; |
| 395 | |
| 396 | if (*is_last) |
| 397 | trb->trb_hw->ctrl.chain = 0; |
| 398 | else { |
| 399 | trb->trb_hw->ctrl.chain = 1; |
| 400 | dev_dbg(u3d->dev, "chain trb\n"); |
| 401 | } |
| 402 | |
| 403 | wmb(); |
| 404 | |
| 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | /* generate TRB linked list for a request |
| 409 | * usb controller only supports continous trb chain, |
| 410 | * that trb structure physical address should be continous. |
| 411 | */ |
| 412 | static int mv_u3d_req_to_trb(struct mv_u3d_req *req) |
| 413 | { |
| 414 | unsigned count; |
| 415 | int is_last; |
| 416 | struct mv_u3d_trb *trb; |
| 417 | struct mv_u3d_trb_hw *trb_hw; |
| 418 | struct mv_u3d *u3d; |
| 419 | dma_addr_t dma; |
| 420 | unsigned length; |
| 421 | unsigned trb_num; |
| 422 | |
| 423 | u3d = req->ep->u3d; |
| 424 | |
| 425 | INIT_LIST_HEAD(&req->trb_list); |
| 426 | |
| 427 | length = req->req.length - req->req.actual; |
| 428 | /* normally the request transfer length is less than 16KB. |
| 429 | * we use buil_trb_one() to optimize it. |
| 430 | */ |
| 431 | if (length <= (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER) { |
| 432 | trb = mv_u3d_build_trb_one(req, &count, &dma); |
| 433 | list_add_tail(&trb->trb_list, &req->trb_list); |
| 434 | req->trb_head = trb; |
| 435 | req->trb_count = 1; |
| 436 | req->chain = 0; |
| 437 | } else { |
| 438 | trb_num = length / MV_U3D_EP_MAX_LENGTH_TRANSFER; |
| 439 | if (length % MV_U3D_EP_MAX_LENGTH_TRANSFER) |
| 440 | trb_num++; |
| 441 | |
| 442 | trb = kcalloc(trb_num, sizeof(*trb), GFP_ATOMIC); |
Jingoo Han | f3772c2 | 2014-05-07 15:48:13 +0900 | [diff] [blame] | 443 | if (!trb) |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 444 | return -ENOMEM; |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 445 | |
| 446 | trb_hw = kcalloc(trb_num, sizeof(*trb_hw), GFP_ATOMIC); |
| 447 | if (!trb_hw) { |
Valentin Ilie | f51a08d | 2013-09-21 12:30:15 +0300 | [diff] [blame] | 448 | kfree(trb); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 449 | return -ENOMEM; |
| 450 | } |
| 451 | |
| 452 | do { |
| 453 | trb->trb_hw = trb_hw; |
| 454 | if (mv_u3d_build_trb_chain(req, &count, |
| 455 | trb, &is_last)) { |
| 456 | dev_err(u3d->dev, |
| 457 | "%s, mv_u3d_build_trb_chain fail\n", |
| 458 | __func__); |
| 459 | return -EIO; |
| 460 | } |
| 461 | |
| 462 | list_add_tail(&trb->trb_list, &req->trb_list); |
| 463 | req->trb_count++; |
| 464 | trb++; |
| 465 | trb_hw++; |
| 466 | } while (!is_last); |
| 467 | |
| 468 | req->trb_head = list_entry(req->trb_list.next, |
| 469 | struct mv_u3d_trb, trb_list); |
| 470 | req->trb_head->trb_dma = dma_map_single(u3d->gadget.dev.parent, |
| 471 | req->trb_head->trb_hw, |
| 472 | trb_num * sizeof(*trb_hw), |
| 473 | DMA_BIDIRECTIONAL); |
| 474 | |
| 475 | req->chain = 1; |
| 476 | } |
| 477 | |
| 478 | return 0; |
| 479 | } |
| 480 | |
| 481 | static int |
| 482 | mv_u3d_start_queue(struct mv_u3d_ep *ep) |
| 483 | { |
| 484 | struct mv_u3d *u3d = ep->u3d; |
| 485 | struct mv_u3d_req *req; |
| 486 | int ret; |
| 487 | |
| 488 | if (!list_empty(&ep->req_list) && !ep->processing) |
| 489 | req = list_entry(ep->req_list.next, struct mv_u3d_req, list); |
| 490 | else |
| 491 | return 0; |
| 492 | |
| 493 | ep->processing = 1; |
| 494 | |
| 495 | /* set up dma mapping */ |
| 496 | ret = usb_gadget_map_request(&u3d->gadget, &req->req, |
| 497 | mv_u3d_ep_dir(ep)); |
| 498 | if (ret) |
| 499 | return ret; |
| 500 | |
| 501 | req->req.status = -EINPROGRESS; |
| 502 | req->req.actual = 0; |
| 503 | req->trb_count = 0; |
| 504 | |
| 505 | /* build trbs and push them to device queue */ |
| 506 | if (!mv_u3d_req_to_trb(req)) { |
| 507 | ret = mv_u3d_queue_trb(ep, req); |
| 508 | if (ret) { |
| 509 | ep->processing = 0; |
| 510 | return ret; |
| 511 | } |
| 512 | } else { |
| 513 | ep->processing = 0; |
| 514 | dev_err(u3d->dev, "%s, mv_u3d_req_to_trb fail\n", __func__); |
| 515 | return -ENOMEM; |
| 516 | } |
| 517 | |
| 518 | /* irq handler advances the queue */ |
| 519 | if (req) |
| 520 | list_add_tail(&req->queue, &ep->queue); |
| 521 | |
| 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | static int mv_u3d_ep_enable(struct usb_ep *_ep, |
| 526 | const struct usb_endpoint_descriptor *desc) |
| 527 | { |
| 528 | struct mv_u3d *u3d; |
| 529 | struct mv_u3d_ep *ep; |
| 530 | struct mv_u3d_ep_context *ep_context; |
| 531 | u16 max = 0; |
| 532 | unsigned maxburst = 0; |
| 533 | u32 epxcr, direction; |
| 534 | |
| 535 | if (!_ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) |
| 536 | return -EINVAL; |
| 537 | |
| 538 | ep = container_of(_ep, struct mv_u3d_ep, ep); |
| 539 | u3d = ep->u3d; |
| 540 | |
| 541 | if (!u3d->driver || u3d->gadget.speed == USB_SPEED_UNKNOWN) |
| 542 | return -ESHUTDOWN; |
| 543 | |
| 544 | direction = mv_u3d_ep_dir(ep); |
| 545 | max = le16_to_cpu(desc->wMaxPacketSize); |
| 546 | |
| 547 | if (!_ep->maxburst) |
| 548 | _ep->maxburst = 1; |
| 549 | maxburst = _ep->maxburst; |
| 550 | |
| 551 | /* Get the endpoint context address */ |
| 552 | ep_context = (struct mv_u3d_ep_context *)ep->ep_context; |
| 553 | |
| 554 | /* Set the max burst size */ |
| 555 | switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { |
| 556 | case USB_ENDPOINT_XFER_BULK: |
| 557 | if (maxburst > 16) { |
| 558 | dev_dbg(u3d->dev, |
| 559 | "max burst should not be greater " |
| 560 | "than 16 on bulk ep\n"); |
| 561 | maxburst = 1; |
| 562 | _ep->maxburst = maxburst; |
| 563 | } |
| 564 | dev_dbg(u3d->dev, |
| 565 | "maxburst: %d on bulk %s\n", maxburst, ep->name); |
| 566 | break; |
| 567 | case USB_ENDPOINT_XFER_CONTROL: |
| 568 | /* control transfer only supports maxburst as one */ |
| 569 | maxburst = 1; |
| 570 | _ep->maxburst = maxburst; |
| 571 | break; |
| 572 | case USB_ENDPOINT_XFER_INT: |
| 573 | if (maxburst != 1) { |
| 574 | dev_dbg(u3d->dev, |
| 575 | "max burst should be 1 on int ep " |
| 576 | "if transfer size is not 1024\n"); |
| 577 | maxburst = 1; |
| 578 | _ep->maxburst = maxburst; |
| 579 | } |
| 580 | break; |
| 581 | case USB_ENDPOINT_XFER_ISOC: |
| 582 | if (maxburst != 1) { |
| 583 | dev_dbg(u3d->dev, |
| 584 | "max burst should be 1 on isoc ep " |
| 585 | "if transfer size is not 1024\n"); |
| 586 | maxburst = 1; |
| 587 | _ep->maxburst = maxburst; |
| 588 | } |
| 589 | break; |
| 590 | default: |
| 591 | goto en_done; |
| 592 | } |
| 593 | |
| 594 | ep->ep.maxpacket = max; |
| 595 | ep->ep.desc = desc; |
| 596 | ep->enabled = 1; |
| 597 | |
| 598 | /* Enable the endpoint for Rx or Tx and set the endpoint type */ |
| 599 | if (direction == MV_U3D_EP_DIR_OUT) { |
| 600 | epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0); |
| 601 | epxcr |= MV_U3D_EPXCR_EP_INIT; |
| 602 | iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0); |
| 603 | udelay(5); |
| 604 | epxcr &= ~MV_U3D_EPXCR_EP_INIT; |
| 605 | iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0); |
| 606 | |
| 607 | epxcr = ((max << MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT) |
| 608 | | ((maxburst - 1) << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT) |
| 609 | | (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT) |
| 610 | | (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)); |
| 611 | iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr1); |
| 612 | } else { |
| 613 | epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0); |
| 614 | epxcr |= MV_U3D_EPXCR_EP_INIT; |
| 615 | iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0); |
| 616 | udelay(5); |
| 617 | epxcr &= ~MV_U3D_EPXCR_EP_INIT; |
| 618 | iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0); |
| 619 | |
| 620 | epxcr = ((max << MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT) |
| 621 | | ((maxburst - 1) << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT) |
| 622 | | (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT) |
| 623 | | (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)); |
| 624 | iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr1); |
| 625 | } |
| 626 | |
| 627 | return 0; |
| 628 | en_done: |
| 629 | return -EINVAL; |
| 630 | } |
| 631 | |
| 632 | static int mv_u3d_ep_disable(struct usb_ep *_ep) |
| 633 | { |
| 634 | struct mv_u3d *u3d; |
| 635 | struct mv_u3d_ep *ep; |
| 636 | struct mv_u3d_ep_context *ep_context; |
| 637 | u32 epxcr, direction; |
Alexey Khoroshilov | 2389df4 | 2013-07-24 00:20:17 +0400 | [diff] [blame] | 638 | unsigned long flags; |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 639 | |
| 640 | if (!_ep) |
| 641 | return -EINVAL; |
| 642 | |
| 643 | ep = container_of(_ep, struct mv_u3d_ep, ep); |
| 644 | if (!ep->ep.desc) |
| 645 | return -EINVAL; |
| 646 | |
| 647 | u3d = ep->u3d; |
| 648 | |
| 649 | /* Get the endpoint context address */ |
| 650 | ep_context = ep->ep_context; |
| 651 | |
| 652 | direction = mv_u3d_ep_dir(ep); |
| 653 | |
| 654 | /* nuke all pending requests (does flush) */ |
Alexey Khoroshilov | 2389df4 | 2013-07-24 00:20:17 +0400 | [diff] [blame] | 655 | spin_lock_irqsave(&u3d->lock, flags); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 656 | mv_u3d_nuke(ep, -ESHUTDOWN); |
Alexey Khoroshilov | 2389df4 | 2013-07-24 00:20:17 +0400 | [diff] [blame] | 657 | spin_unlock_irqrestore(&u3d->lock, flags); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 658 | |
| 659 | /* Disable the endpoint for Rx or Tx and reset the endpoint type */ |
| 660 | if (direction == MV_U3D_EP_DIR_OUT) { |
| 661 | epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr1); |
| 662 | epxcr &= ~((1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT) |
| 663 | | USB_ENDPOINT_XFERTYPE_MASK); |
| 664 | iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr1); |
| 665 | } else { |
| 666 | epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr1); |
| 667 | epxcr &= ~((1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT) |
| 668 | | USB_ENDPOINT_XFERTYPE_MASK); |
| 669 | iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr1); |
| 670 | } |
| 671 | |
| 672 | ep->enabled = 0; |
| 673 | |
| 674 | ep->ep.desc = NULL; |
| 675 | return 0; |
| 676 | } |
| 677 | |
| 678 | static struct usb_request * |
| 679 | mv_u3d_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
| 680 | { |
| 681 | struct mv_u3d_req *req = NULL; |
| 682 | |
| 683 | req = kzalloc(sizeof *req, gfp_flags); |
| 684 | if (!req) |
| 685 | return NULL; |
| 686 | |
| 687 | INIT_LIST_HEAD(&req->queue); |
| 688 | |
| 689 | return &req->req; |
| 690 | } |
| 691 | |
| 692 | static void mv_u3d_free_request(struct usb_ep *_ep, struct usb_request *_req) |
| 693 | { |
| 694 | struct mv_u3d_req *req = container_of(_req, struct mv_u3d_req, req); |
| 695 | |
| 696 | kfree(req); |
| 697 | } |
| 698 | |
| 699 | static void mv_u3d_ep_fifo_flush(struct usb_ep *_ep) |
| 700 | { |
| 701 | struct mv_u3d *u3d; |
| 702 | u32 direction; |
| 703 | struct mv_u3d_ep *ep = container_of(_ep, struct mv_u3d_ep, ep); |
| 704 | unsigned int loops; |
| 705 | u32 tmp; |
| 706 | |
| 707 | /* if endpoint is not enabled, cannot flush endpoint */ |
| 708 | if (!ep->enabled) |
| 709 | return; |
| 710 | |
| 711 | u3d = ep->u3d; |
| 712 | direction = mv_u3d_ep_dir(ep); |
| 713 | |
| 714 | /* ep0 need clear bit after flushing fifo. */ |
| 715 | if (!ep->ep_num) { |
| 716 | if (direction == MV_U3D_EP_DIR_OUT) { |
| 717 | tmp = ioread32(&u3d->vuc_regs->epcr[0].epxoutcr0); |
| 718 | tmp |= MV_U3D_EPXCR_EP_FLUSH; |
| 719 | iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxoutcr0); |
| 720 | udelay(10); |
| 721 | tmp &= ~MV_U3D_EPXCR_EP_FLUSH; |
| 722 | iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxoutcr0); |
| 723 | } else { |
| 724 | tmp = ioread32(&u3d->vuc_regs->epcr[0].epxincr0); |
| 725 | tmp |= MV_U3D_EPXCR_EP_FLUSH; |
| 726 | iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxincr0); |
| 727 | udelay(10); |
| 728 | tmp &= ~MV_U3D_EPXCR_EP_FLUSH; |
| 729 | iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxincr0); |
| 730 | } |
| 731 | return; |
| 732 | } |
| 733 | |
| 734 | if (direction == MV_U3D_EP_DIR_OUT) { |
| 735 | tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0); |
| 736 | tmp |= MV_U3D_EPXCR_EP_FLUSH; |
| 737 | iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0); |
| 738 | |
| 739 | /* Wait until flushing completed */ |
| 740 | loops = LOOPS(MV_U3D_FLUSH_TIMEOUT); |
| 741 | while (ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0) & |
| 742 | MV_U3D_EPXCR_EP_FLUSH) { |
| 743 | /* |
| 744 | * EP_FLUSH bit should be cleared to indicate this |
| 745 | * operation is complete |
| 746 | */ |
| 747 | if (loops == 0) { |
| 748 | dev_dbg(u3d->dev, |
| 749 | "EP FLUSH TIMEOUT for ep%d%s\n", ep->ep_num, |
| 750 | direction ? "in" : "out"); |
| 751 | return; |
| 752 | } |
| 753 | loops--; |
| 754 | udelay(LOOPS_USEC); |
| 755 | } |
| 756 | } else { /* EP_DIR_IN */ |
| 757 | tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0); |
| 758 | tmp |= MV_U3D_EPXCR_EP_FLUSH; |
| 759 | iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0); |
| 760 | |
| 761 | /* Wait until flushing completed */ |
| 762 | loops = LOOPS(MV_U3D_FLUSH_TIMEOUT); |
| 763 | while (ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0) & |
| 764 | MV_U3D_EPXCR_EP_FLUSH) { |
| 765 | /* |
| 766 | * EP_FLUSH bit should be cleared to indicate this |
| 767 | * operation is complete |
| 768 | */ |
| 769 | if (loops == 0) { |
| 770 | dev_dbg(u3d->dev, |
| 771 | "EP FLUSH TIMEOUT for ep%d%s\n", ep->ep_num, |
| 772 | direction ? "in" : "out"); |
| 773 | return; |
| 774 | } |
| 775 | loops--; |
| 776 | udelay(LOOPS_USEC); |
| 777 | } |
| 778 | } |
| 779 | } |
| 780 | |
| 781 | /* queues (submits) an I/O request to an endpoint */ |
| 782 | static int |
| 783 | mv_u3d_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
| 784 | { |
| 785 | struct mv_u3d_ep *ep; |
| 786 | struct mv_u3d_req *req; |
| 787 | struct mv_u3d *u3d; |
| 788 | unsigned long flags; |
| 789 | int is_first_req = 0; |
| 790 | |
| 791 | if (unlikely(!_ep || !_req)) |
| 792 | return -EINVAL; |
| 793 | |
| 794 | ep = container_of(_ep, struct mv_u3d_ep, ep); |
| 795 | u3d = ep->u3d; |
| 796 | |
| 797 | req = container_of(_req, struct mv_u3d_req, req); |
| 798 | |
| 799 | if (!ep->ep_num |
| 800 | && u3d->ep0_state == MV_U3D_STATUS_STAGE |
| 801 | && !_req->length) { |
| 802 | dev_dbg(u3d->dev, "ep0 status stage\n"); |
| 803 | u3d->ep0_state = MV_U3D_WAIT_FOR_SETUP; |
| 804 | return 0; |
| 805 | } |
| 806 | |
Felipe Balbi | e6667ef | 2013-03-22 09:14:25 +0200 | [diff] [blame] | 807 | dev_dbg(u3d->dev, "%s: %s, req: 0x%p\n", |
| 808 | __func__, _ep->name, req); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 809 | |
| 810 | /* catch various bogus parameters */ |
| 811 | if (!req->req.complete || !req->req.buf |
| 812 | || !list_empty(&req->queue)) { |
| 813 | dev_err(u3d->dev, |
Felipe Balbi | e6667ef | 2013-03-22 09:14:25 +0200 | [diff] [blame] | 814 | "%s, bad params, _req: 0x%p," |
| 815 | "req->req.complete: 0x%p, req->req.buf: 0x%p," |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 816 | "list_empty: 0x%x\n", |
Felipe Balbi | e6667ef | 2013-03-22 09:14:25 +0200 | [diff] [blame] | 817 | __func__, _req, |
| 818 | req->req.complete, req->req.buf, |
| 819 | list_empty(&req->queue)); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 820 | return -EINVAL; |
| 821 | } |
| 822 | if (unlikely(!ep->ep.desc)) { |
| 823 | dev_err(u3d->dev, "%s, bad ep\n", __func__); |
| 824 | return -EINVAL; |
| 825 | } |
| 826 | if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) { |
| 827 | if (req->req.length > ep->ep.maxpacket) |
| 828 | return -EMSGSIZE; |
| 829 | } |
| 830 | |
| 831 | if (!u3d->driver || u3d->gadget.speed == USB_SPEED_UNKNOWN) { |
| 832 | dev_err(u3d->dev, |
| 833 | "bad params of driver/speed\n"); |
| 834 | return -ESHUTDOWN; |
| 835 | } |
| 836 | |
| 837 | req->ep = ep; |
| 838 | |
| 839 | /* Software list handles usb request. */ |
| 840 | spin_lock_irqsave(&ep->req_lock, flags); |
| 841 | is_first_req = list_empty(&ep->req_list); |
| 842 | list_add_tail(&req->list, &ep->req_list); |
| 843 | spin_unlock_irqrestore(&ep->req_lock, flags); |
| 844 | if (!is_first_req) { |
| 845 | dev_dbg(u3d->dev, "list is not empty\n"); |
| 846 | return 0; |
| 847 | } |
| 848 | |
| 849 | dev_dbg(u3d->dev, "call mv_u3d_start_queue from usb_ep_queue\n"); |
| 850 | spin_lock_irqsave(&u3d->lock, flags); |
| 851 | mv_u3d_start_queue(ep); |
| 852 | spin_unlock_irqrestore(&u3d->lock, flags); |
| 853 | return 0; |
| 854 | } |
| 855 | |
| 856 | /* dequeues (cancels, unlinks) an I/O request from an endpoint */ |
| 857 | static int mv_u3d_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| 858 | { |
| 859 | struct mv_u3d_ep *ep; |
| 860 | struct mv_u3d_req *req; |
| 861 | struct mv_u3d *u3d; |
| 862 | struct mv_u3d_ep_context *ep_context; |
| 863 | struct mv_u3d_req *next_req; |
| 864 | |
| 865 | unsigned long flags; |
| 866 | int ret = 0; |
| 867 | |
| 868 | if (!_ep || !_req) |
| 869 | return -EINVAL; |
| 870 | |
| 871 | ep = container_of(_ep, struct mv_u3d_ep, ep); |
| 872 | u3d = ep->u3d; |
| 873 | |
| 874 | spin_lock_irqsave(&ep->u3d->lock, flags); |
| 875 | |
| 876 | /* make sure it's actually queued on this endpoint */ |
| 877 | list_for_each_entry(req, &ep->queue, queue) { |
| 878 | if (&req->req == _req) |
| 879 | break; |
| 880 | } |
| 881 | if (&req->req != _req) { |
| 882 | ret = -EINVAL; |
| 883 | goto out; |
| 884 | } |
| 885 | |
| 886 | /* The request is in progress, or completed but not dequeued */ |
| 887 | if (ep->queue.next == &req->queue) { |
| 888 | _req->status = -ECONNRESET; |
| 889 | mv_u3d_ep_fifo_flush(_ep); |
| 890 | |
| 891 | /* The request isn't the last request in this ep queue */ |
| 892 | if (req->queue.next != &ep->queue) { |
| 893 | dev_dbg(u3d->dev, |
| 894 | "it is the last request in this ep queue\n"); |
| 895 | ep_context = ep->ep_context; |
| 896 | next_req = list_entry(req->queue.next, |
| 897 | struct mv_u3d_req, queue); |
| 898 | |
| 899 | /* Point first TRB of next request to the EP context. */ |
Felipe Balbi | e6667ef | 2013-03-22 09:14:25 +0200 | [diff] [blame] | 900 | iowrite32((unsigned long) next_req->trb_head, |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 901 | &ep_context->trb_addr_lo); |
| 902 | } else { |
| 903 | struct mv_u3d_ep_context *ep_context; |
| 904 | ep_context = ep->ep_context; |
| 905 | ep_context->trb_addr_lo = 0; |
| 906 | ep_context->trb_addr_hi = 0; |
| 907 | } |
| 908 | |
| 909 | } else |
| 910 | WARN_ON(1); |
| 911 | |
| 912 | mv_u3d_done(ep, req, -ECONNRESET); |
| 913 | |
| 914 | /* remove the req from the ep req list */ |
| 915 | if (!list_empty(&ep->req_list)) { |
| 916 | struct mv_u3d_req *curr_req; |
| 917 | curr_req = list_entry(ep->req_list.next, |
| 918 | struct mv_u3d_req, list); |
| 919 | if (curr_req == req) { |
| 920 | list_del_init(&req->list); |
| 921 | ep->processing = 0; |
| 922 | } |
| 923 | } |
| 924 | |
| 925 | out: |
| 926 | spin_unlock_irqrestore(&ep->u3d->lock, flags); |
| 927 | return ret; |
| 928 | } |
| 929 | |
| 930 | static void |
| 931 | mv_u3d_ep_set_stall(struct mv_u3d *u3d, u8 ep_num, u8 direction, int stall) |
| 932 | { |
| 933 | u32 tmp; |
| 934 | struct mv_u3d_ep *ep = u3d->eps; |
| 935 | |
| 936 | dev_dbg(u3d->dev, "%s\n", __func__); |
| 937 | if (direction == MV_U3D_EP_DIR_OUT) { |
| 938 | tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0); |
| 939 | if (stall) |
| 940 | tmp |= MV_U3D_EPXCR_EP_HALT; |
| 941 | else |
| 942 | tmp &= ~MV_U3D_EPXCR_EP_HALT; |
| 943 | iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0); |
| 944 | } else { |
| 945 | tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0); |
| 946 | if (stall) |
| 947 | tmp |= MV_U3D_EPXCR_EP_HALT; |
| 948 | else |
| 949 | tmp &= ~MV_U3D_EPXCR_EP_HALT; |
| 950 | iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0); |
| 951 | } |
| 952 | } |
| 953 | |
| 954 | static int mv_u3d_ep_set_halt_wedge(struct usb_ep *_ep, int halt, int wedge) |
| 955 | { |
| 956 | struct mv_u3d_ep *ep; |
| 957 | unsigned long flags = 0; |
| 958 | int status = 0; |
| 959 | struct mv_u3d *u3d; |
| 960 | |
| 961 | ep = container_of(_ep, struct mv_u3d_ep, ep); |
| 962 | u3d = ep->u3d; |
| 963 | if (!ep->ep.desc) { |
| 964 | status = -EINVAL; |
| 965 | goto out; |
| 966 | } |
| 967 | |
| 968 | if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) { |
| 969 | status = -EOPNOTSUPP; |
| 970 | goto out; |
| 971 | } |
| 972 | |
| 973 | /* |
| 974 | * Attempt to halt IN ep will fail if any transfer requests |
| 975 | * are still queue |
| 976 | */ |
| 977 | if (halt && (mv_u3d_ep_dir(ep) == MV_U3D_EP_DIR_IN) |
| 978 | && !list_empty(&ep->queue)) { |
| 979 | status = -EAGAIN; |
| 980 | goto out; |
| 981 | } |
| 982 | |
| 983 | spin_lock_irqsave(&ep->u3d->lock, flags); |
| 984 | mv_u3d_ep_set_stall(u3d, ep->ep_num, mv_u3d_ep_dir(ep), halt); |
| 985 | if (halt && wedge) |
| 986 | ep->wedge = 1; |
| 987 | else if (!halt) |
| 988 | ep->wedge = 0; |
| 989 | spin_unlock_irqrestore(&ep->u3d->lock, flags); |
| 990 | |
| 991 | if (ep->ep_num == 0) |
| 992 | u3d->ep0_dir = MV_U3D_EP_DIR_OUT; |
| 993 | out: |
| 994 | return status; |
| 995 | } |
| 996 | |
| 997 | static int mv_u3d_ep_set_halt(struct usb_ep *_ep, int halt) |
| 998 | { |
| 999 | return mv_u3d_ep_set_halt_wedge(_ep, halt, 0); |
| 1000 | } |
| 1001 | |
| 1002 | static int mv_u3d_ep_set_wedge(struct usb_ep *_ep) |
| 1003 | { |
| 1004 | return mv_u3d_ep_set_halt_wedge(_ep, 1, 1); |
| 1005 | } |
| 1006 | |
| 1007 | static struct usb_ep_ops mv_u3d_ep_ops = { |
| 1008 | .enable = mv_u3d_ep_enable, |
| 1009 | .disable = mv_u3d_ep_disable, |
| 1010 | |
| 1011 | .alloc_request = mv_u3d_alloc_request, |
| 1012 | .free_request = mv_u3d_free_request, |
| 1013 | |
| 1014 | .queue = mv_u3d_ep_queue, |
| 1015 | .dequeue = mv_u3d_ep_dequeue, |
| 1016 | |
| 1017 | .set_wedge = mv_u3d_ep_set_wedge, |
| 1018 | .set_halt = mv_u3d_ep_set_halt, |
| 1019 | .fifo_flush = mv_u3d_ep_fifo_flush, |
| 1020 | }; |
| 1021 | |
| 1022 | static void mv_u3d_controller_stop(struct mv_u3d *u3d) |
| 1023 | { |
| 1024 | u32 tmp; |
| 1025 | |
| 1026 | if (!u3d->clock_gating && u3d->vbus_valid_detect) |
| 1027 | iowrite32(MV_U3D_INTR_ENABLE_VBUS_VALID, |
| 1028 | &u3d->vuc_regs->intrenable); |
| 1029 | else |
| 1030 | iowrite32(0, &u3d->vuc_regs->intrenable); |
| 1031 | iowrite32(~0x0, &u3d->vuc_regs->endcomplete); |
| 1032 | iowrite32(~0x0, &u3d->vuc_regs->trbunderrun); |
| 1033 | iowrite32(~0x0, &u3d->vuc_regs->trbcomplete); |
| 1034 | iowrite32(~0x0, &u3d->vuc_regs->linkchange); |
| 1035 | iowrite32(0x1, &u3d->vuc_regs->setuplock); |
| 1036 | |
| 1037 | /* Reset the RUN bit in the command register to stop USB */ |
| 1038 | tmp = ioread32(&u3d->op_regs->usbcmd); |
| 1039 | tmp &= ~MV_U3D_CMD_RUN_STOP; |
| 1040 | iowrite32(tmp, &u3d->op_regs->usbcmd); |
| 1041 | dev_dbg(u3d->dev, "after u3d_stop, USBCMD 0x%x\n", |
| 1042 | ioread32(&u3d->op_regs->usbcmd)); |
| 1043 | } |
| 1044 | |
| 1045 | static void mv_u3d_controller_start(struct mv_u3d *u3d) |
| 1046 | { |
| 1047 | u32 usbintr; |
| 1048 | u32 temp; |
| 1049 | |
| 1050 | /* enable link LTSSM state machine */ |
| 1051 | temp = ioread32(&u3d->vuc_regs->ltssm); |
| 1052 | temp |= MV_U3D_LTSSM_PHY_INIT_DONE; |
| 1053 | iowrite32(temp, &u3d->vuc_regs->ltssm); |
| 1054 | |
| 1055 | /* Enable interrupts */ |
| 1056 | usbintr = MV_U3D_INTR_ENABLE_LINK_CHG | MV_U3D_INTR_ENABLE_TXDESC_ERR | |
| 1057 | MV_U3D_INTR_ENABLE_RXDESC_ERR | MV_U3D_INTR_ENABLE_TX_COMPLETE | |
| 1058 | MV_U3D_INTR_ENABLE_RX_COMPLETE | MV_U3D_INTR_ENABLE_SETUP | |
| 1059 | (u3d->vbus_valid_detect ? MV_U3D_INTR_ENABLE_VBUS_VALID : 0); |
| 1060 | iowrite32(usbintr, &u3d->vuc_regs->intrenable); |
| 1061 | |
| 1062 | /* Enable ctrl ep */ |
| 1063 | iowrite32(0x1, &u3d->vuc_regs->ctrlepenable); |
| 1064 | |
| 1065 | /* Set the Run bit in the command register */ |
| 1066 | iowrite32(MV_U3D_CMD_RUN_STOP, &u3d->op_regs->usbcmd); |
| 1067 | dev_dbg(u3d->dev, "after u3d_start, USBCMD 0x%x\n", |
| 1068 | ioread32(&u3d->op_regs->usbcmd)); |
| 1069 | } |
| 1070 | |
| 1071 | static int mv_u3d_controller_reset(struct mv_u3d *u3d) |
| 1072 | { |
| 1073 | unsigned int loops; |
| 1074 | u32 tmp; |
| 1075 | |
| 1076 | /* Stop the controller */ |
| 1077 | tmp = ioread32(&u3d->op_regs->usbcmd); |
| 1078 | tmp &= ~MV_U3D_CMD_RUN_STOP; |
| 1079 | iowrite32(tmp, &u3d->op_regs->usbcmd); |
| 1080 | |
| 1081 | /* Reset the controller to get default values */ |
| 1082 | iowrite32(MV_U3D_CMD_CTRL_RESET, &u3d->op_regs->usbcmd); |
| 1083 | |
| 1084 | /* wait for reset to complete */ |
| 1085 | loops = LOOPS(MV_U3D_RESET_TIMEOUT); |
| 1086 | while (ioread32(&u3d->op_regs->usbcmd) & MV_U3D_CMD_CTRL_RESET) { |
| 1087 | if (loops == 0) { |
| 1088 | dev_err(u3d->dev, |
| 1089 | "Wait for RESET completed TIMEOUT\n"); |
| 1090 | return -ETIMEDOUT; |
| 1091 | } |
| 1092 | loops--; |
| 1093 | udelay(LOOPS_USEC); |
| 1094 | } |
| 1095 | |
| 1096 | /* Configure the Endpoint Context Address */ |
| 1097 | iowrite32(u3d->ep_context_dma, &u3d->op_regs->dcbaapl); |
| 1098 | iowrite32(0, &u3d->op_regs->dcbaaph); |
| 1099 | |
| 1100 | return 0; |
| 1101 | } |
| 1102 | |
| 1103 | static int mv_u3d_enable(struct mv_u3d *u3d) |
| 1104 | { |
Jingoo Han | e01ee9f | 2013-07-30 17:00:51 +0900 | [diff] [blame] | 1105 | struct mv_usb_platform_data *pdata = dev_get_platdata(u3d->dev); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1106 | int retval; |
| 1107 | |
| 1108 | if (u3d->active) |
| 1109 | return 0; |
| 1110 | |
| 1111 | if (!u3d->clock_gating) { |
| 1112 | u3d->active = 1; |
| 1113 | return 0; |
| 1114 | } |
| 1115 | |
| 1116 | dev_dbg(u3d->dev, "enable u3d\n"); |
| 1117 | clk_enable(u3d->clk); |
| 1118 | if (pdata->phy_init) { |
| 1119 | retval = pdata->phy_init(u3d->phy_regs); |
| 1120 | if (retval) { |
| 1121 | dev_err(u3d->dev, |
| 1122 | "init phy error %d\n", retval); |
| 1123 | clk_disable(u3d->clk); |
| 1124 | return retval; |
| 1125 | } |
| 1126 | } |
| 1127 | u3d->active = 1; |
| 1128 | |
| 1129 | return 0; |
| 1130 | } |
| 1131 | |
| 1132 | static void mv_u3d_disable(struct mv_u3d *u3d) |
| 1133 | { |
Jingoo Han | e01ee9f | 2013-07-30 17:00:51 +0900 | [diff] [blame] | 1134 | struct mv_usb_platform_data *pdata = dev_get_platdata(u3d->dev); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1135 | if (u3d->clock_gating && u3d->active) { |
| 1136 | dev_dbg(u3d->dev, "disable u3d\n"); |
| 1137 | if (pdata->phy_deinit) |
| 1138 | pdata->phy_deinit(u3d->phy_regs); |
| 1139 | clk_disable(u3d->clk); |
| 1140 | u3d->active = 0; |
| 1141 | } |
| 1142 | } |
| 1143 | |
| 1144 | static int mv_u3d_vbus_session(struct usb_gadget *gadget, int is_active) |
| 1145 | { |
| 1146 | struct mv_u3d *u3d; |
| 1147 | unsigned long flags; |
| 1148 | int retval = 0; |
| 1149 | |
| 1150 | u3d = container_of(gadget, struct mv_u3d, gadget); |
| 1151 | |
| 1152 | spin_lock_irqsave(&u3d->lock, flags); |
| 1153 | |
| 1154 | u3d->vbus_active = (is_active != 0); |
| 1155 | dev_dbg(u3d->dev, "%s: softconnect %d, vbus_active %d\n", |
| 1156 | __func__, u3d->softconnect, u3d->vbus_active); |
| 1157 | /* |
| 1158 | * 1. external VBUS detect: we can disable/enable clock on demand. |
| 1159 | * 2. UDC VBUS detect: we have to enable clock all the time. |
| 1160 | * 3. No VBUS detect: we have to enable clock all the time. |
| 1161 | */ |
| 1162 | if (u3d->driver && u3d->softconnect && u3d->vbus_active) { |
| 1163 | retval = mv_u3d_enable(u3d); |
| 1164 | if (retval == 0) { |
| 1165 | /* |
| 1166 | * after clock is disabled, we lost all the register |
| 1167 | * context. We have to re-init registers |
| 1168 | */ |
| 1169 | mv_u3d_controller_reset(u3d); |
| 1170 | mv_u3d_ep0_reset(u3d); |
| 1171 | mv_u3d_controller_start(u3d); |
| 1172 | } |
| 1173 | } else if (u3d->driver && u3d->softconnect) { |
| 1174 | if (!u3d->active) |
| 1175 | goto out; |
| 1176 | |
| 1177 | /* stop all the transfer in queue*/ |
| 1178 | mv_u3d_stop_activity(u3d, u3d->driver); |
| 1179 | mv_u3d_controller_stop(u3d); |
| 1180 | mv_u3d_disable(u3d); |
| 1181 | } |
| 1182 | |
| 1183 | out: |
| 1184 | spin_unlock_irqrestore(&u3d->lock, flags); |
| 1185 | return retval; |
| 1186 | } |
| 1187 | |
| 1188 | /* constrain controller's VBUS power usage |
| 1189 | * This call is used by gadget drivers during SET_CONFIGURATION calls, |
| 1190 | * reporting how much power the device may consume. For example, this |
| 1191 | * could affect how quickly batteries are recharged. |
| 1192 | * |
| 1193 | * Returns zero on success, else negative errno. |
| 1194 | */ |
| 1195 | static int mv_u3d_vbus_draw(struct usb_gadget *gadget, unsigned mA) |
| 1196 | { |
| 1197 | struct mv_u3d *u3d = container_of(gadget, struct mv_u3d, gadget); |
| 1198 | |
| 1199 | u3d->power = mA; |
| 1200 | |
| 1201 | return 0; |
| 1202 | } |
| 1203 | |
| 1204 | static int mv_u3d_pullup(struct usb_gadget *gadget, int is_on) |
| 1205 | { |
| 1206 | struct mv_u3d *u3d = container_of(gadget, struct mv_u3d, gadget); |
| 1207 | unsigned long flags; |
| 1208 | int retval = 0; |
| 1209 | |
| 1210 | spin_lock_irqsave(&u3d->lock, flags); |
| 1211 | |
| 1212 | dev_dbg(u3d->dev, "%s: softconnect %d, vbus_active %d\n", |
| 1213 | __func__, u3d->softconnect, u3d->vbus_active); |
| 1214 | u3d->softconnect = (is_on != 0); |
| 1215 | if (u3d->driver && u3d->softconnect && u3d->vbus_active) { |
| 1216 | retval = mv_u3d_enable(u3d); |
| 1217 | if (retval == 0) { |
| 1218 | /* |
| 1219 | * after clock is disabled, we lost all the register |
| 1220 | * context. We have to re-init registers |
| 1221 | */ |
| 1222 | mv_u3d_controller_reset(u3d); |
| 1223 | mv_u3d_ep0_reset(u3d); |
| 1224 | mv_u3d_controller_start(u3d); |
| 1225 | } |
| 1226 | } else if (u3d->driver && u3d->vbus_active) { |
| 1227 | /* stop all the transfer in queue*/ |
| 1228 | mv_u3d_stop_activity(u3d, u3d->driver); |
| 1229 | mv_u3d_controller_stop(u3d); |
| 1230 | mv_u3d_disable(u3d); |
| 1231 | } |
| 1232 | |
| 1233 | spin_unlock_irqrestore(&u3d->lock, flags); |
| 1234 | |
| 1235 | return retval; |
| 1236 | } |
| 1237 | |
| 1238 | static int mv_u3d_start(struct usb_gadget *g, |
| 1239 | struct usb_gadget_driver *driver) |
| 1240 | { |
| 1241 | struct mv_u3d *u3d = container_of(g, struct mv_u3d, gadget); |
Jingoo Han | e01ee9f | 2013-07-30 17:00:51 +0900 | [diff] [blame] | 1242 | struct mv_usb_platform_data *pdata = dev_get_platdata(u3d->dev); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1243 | unsigned long flags; |
| 1244 | |
| 1245 | if (u3d->driver) |
| 1246 | return -EBUSY; |
| 1247 | |
| 1248 | spin_lock_irqsave(&u3d->lock, flags); |
| 1249 | |
| 1250 | if (!u3d->clock_gating) { |
| 1251 | clk_enable(u3d->clk); |
| 1252 | if (pdata->phy_init) |
| 1253 | pdata->phy_init(u3d->phy_regs); |
| 1254 | } |
| 1255 | |
| 1256 | /* hook up the driver ... */ |
| 1257 | driver->driver.bus = NULL; |
| 1258 | u3d->driver = driver; |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1259 | |
| 1260 | u3d->ep0_dir = USB_DIR_OUT; |
| 1261 | |
| 1262 | spin_unlock_irqrestore(&u3d->lock, flags); |
| 1263 | |
| 1264 | u3d->vbus_valid_detect = 1; |
| 1265 | |
| 1266 | return 0; |
| 1267 | } |
| 1268 | |
Felipe Balbi | 22835b8 | 2014-10-17 12:05:12 -0500 | [diff] [blame] | 1269 | static int mv_u3d_stop(struct usb_gadget *g) |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1270 | { |
| 1271 | struct mv_u3d *u3d = container_of(g, struct mv_u3d, gadget); |
Jingoo Han | e01ee9f | 2013-07-30 17:00:51 +0900 | [diff] [blame] | 1272 | struct mv_usb_platform_data *pdata = dev_get_platdata(u3d->dev); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1273 | unsigned long flags; |
| 1274 | |
| 1275 | u3d->vbus_valid_detect = 0; |
| 1276 | spin_lock_irqsave(&u3d->lock, flags); |
| 1277 | |
| 1278 | /* enable clock to access controller register */ |
| 1279 | clk_enable(u3d->clk); |
| 1280 | if (pdata->phy_init) |
| 1281 | pdata->phy_init(u3d->phy_regs); |
| 1282 | |
| 1283 | mv_u3d_controller_stop(u3d); |
| 1284 | /* stop all usb activities */ |
| 1285 | u3d->gadget.speed = USB_SPEED_UNKNOWN; |
Felipe Balbi | a19f378 | 2014-10-17 11:21:34 -0500 | [diff] [blame] | 1286 | mv_u3d_stop_activity(u3d, NULL); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1287 | mv_u3d_disable(u3d); |
| 1288 | |
| 1289 | if (pdata->phy_deinit) |
| 1290 | pdata->phy_deinit(u3d->phy_regs); |
| 1291 | clk_disable(u3d->clk); |
| 1292 | |
| 1293 | spin_unlock_irqrestore(&u3d->lock, flags); |
| 1294 | |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1295 | u3d->driver = NULL; |
| 1296 | |
| 1297 | return 0; |
| 1298 | } |
| 1299 | |
| 1300 | /* device controller usb_gadget_ops structure */ |
| 1301 | static const struct usb_gadget_ops mv_u3d_ops = { |
| 1302 | /* notify controller that VBUS is powered or not */ |
| 1303 | .vbus_session = mv_u3d_vbus_session, |
| 1304 | |
| 1305 | /* constrain controller's VBUS power usage */ |
| 1306 | .vbus_draw = mv_u3d_vbus_draw, |
| 1307 | |
| 1308 | .pullup = mv_u3d_pullup, |
| 1309 | .udc_start = mv_u3d_start, |
| 1310 | .udc_stop = mv_u3d_stop, |
| 1311 | }; |
| 1312 | |
| 1313 | static int mv_u3d_eps_init(struct mv_u3d *u3d) |
| 1314 | { |
| 1315 | struct mv_u3d_ep *ep; |
| 1316 | char name[14]; |
| 1317 | int i; |
| 1318 | |
| 1319 | /* initialize ep0, ep0 in/out use eps[1] */ |
| 1320 | ep = &u3d->eps[1]; |
| 1321 | ep->u3d = u3d; |
| 1322 | strncpy(ep->name, "ep0", sizeof(ep->name)); |
| 1323 | ep->ep.name = ep->name; |
| 1324 | ep->ep.ops = &mv_u3d_ep_ops; |
| 1325 | ep->wedge = 0; |
Robert Baldyga | e117e74 | 2013-12-13 12:23:38 +0100 | [diff] [blame] | 1326 | usb_ep_set_maxpacket_limit(&ep->ep, MV_U3D_EP0_MAX_PKT_SIZE); |
Robert Baldyga | c12a306 | 2015-07-31 16:00:33 +0200 | [diff] [blame] | 1327 | ep->ep.caps.type_control = true; |
| 1328 | ep->ep.caps.dir_in = true; |
| 1329 | ep->ep.caps.dir_out = true; |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1330 | ep->ep_num = 0; |
| 1331 | ep->ep.desc = &mv_u3d_ep0_desc; |
| 1332 | INIT_LIST_HEAD(&ep->queue); |
| 1333 | INIT_LIST_HEAD(&ep->req_list); |
| 1334 | ep->ep_type = USB_ENDPOINT_XFER_CONTROL; |
| 1335 | |
| 1336 | /* add ep0 ep_context */ |
| 1337 | ep->ep_context = &u3d->ep_context[1]; |
| 1338 | |
| 1339 | /* initialize other endpoints */ |
| 1340 | for (i = 2; i < u3d->max_eps * 2; i++) { |
| 1341 | ep = &u3d->eps[i]; |
| 1342 | if (i & 1) { |
| 1343 | snprintf(name, sizeof(name), "ep%din", i >> 1); |
| 1344 | ep->direction = MV_U3D_EP_DIR_IN; |
Robert Baldyga | c12a306 | 2015-07-31 16:00:33 +0200 | [diff] [blame] | 1345 | ep->ep.caps.dir_in = true; |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1346 | } else { |
| 1347 | snprintf(name, sizeof(name), "ep%dout", i >> 1); |
| 1348 | ep->direction = MV_U3D_EP_DIR_OUT; |
Robert Baldyga | c12a306 | 2015-07-31 16:00:33 +0200 | [diff] [blame] | 1349 | ep->ep.caps.dir_out = true; |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1350 | } |
| 1351 | ep->u3d = u3d; |
| 1352 | strncpy(ep->name, name, sizeof(ep->name)); |
| 1353 | ep->ep.name = ep->name; |
| 1354 | |
Robert Baldyga | c12a306 | 2015-07-31 16:00:33 +0200 | [diff] [blame] | 1355 | ep->ep.caps.type_iso = true; |
| 1356 | ep->ep.caps.type_bulk = true; |
| 1357 | ep->ep.caps.type_int = true; |
| 1358 | |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1359 | ep->ep.ops = &mv_u3d_ep_ops; |
Robert Baldyga | e117e74 | 2013-12-13 12:23:38 +0100 | [diff] [blame] | 1360 | usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1361 | ep->ep_num = i / 2; |
| 1362 | |
| 1363 | INIT_LIST_HEAD(&ep->queue); |
| 1364 | list_add_tail(&ep->ep.ep_list, &u3d->gadget.ep_list); |
| 1365 | |
| 1366 | INIT_LIST_HEAD(&ep->req_list); |
| 1367 | spin_lock_init(&ep->req_lock); |
| 1368 | ep->ep_context = &u3d->ep_context[i]; |
| 1369 | } |
| 1370 | |
| 1371 | return 0; |
| 1372 | } |
| 1373 | |
| 1374 | /* delete all endpoint requests, called with spinlock held */ |
| 1375 | static void mv_u3d_nuke(struct mv_u3d_ep *ep, int status) |
| 1376 | { |
| 1377 | /* endpoint fifo flush */ |
| 1378 | mv_u3d_ep_fifo_flush(&ep->ep); |
| 1379 | |
| 1380 | while (!list_empty(&ep->queue)) { |
| 1381 | struct mv_u3d_req *req = NULL; |
| 1382 | req = list_entry(ep->queue.next, struct mv_u3d_req, queue); |
| 1383 | mv_u3d_done(ep, req, status); |
| 1384 | } |
| 1385 | } |
| 1386 | |
| 1387 | /* stop all USB activities */ |
| 1388 | static |
| 1389 | void mv_u3d_stop_activity(struct mv_u3d *u3d, struct usb_gadget_driver *driver) |
| 1390 | { |
| 1391 | struct mv_u3d_ep *ep; |
| 1392 | |
| 1393 | mv_u3d_nuke(&u3d->eps[1], -ESHUTDOWN); |
| 1394 | |
| 1395 | list_for_each_entry(ep, &u3d->gadget.ep_list, ep.ep_list) { |
| 1396 | mv_u3d_nuke(ep, -ESHUTDOWN); |
| 1397 | } |
| 1398 | |
| 1399 | /* report disconnect; the driver is already quiesced */ |
| 1400 | if (driver) { |
| 1401 | spin_unlock(&u3d->lock); |
| 1402 | driver->disconnect(&u3d->gadget); |
| 1403 | spin_lock(&u3d->lock); |
| 1404 | } |
| 1405 | } |
| 1406 | |
| 1407 | static void mv_u3d_irq_process_error(struct mv_u3d *u3d) |
| 1408 | { |
| 1409 | /* Increment the error count */ |
| 1410 | u3d->errors++; |
| 1411 | dev_err(u3d->dev, "%s\n", __func__); |
| 1412 | } |
| 1413 | |
| 1414 | static void mv_u3d_irq_process_link_change(struct mv_u3d *u3d) |
| 1415 | { |
| 1416 | u32 linkchange; |
| 1417 | |
| 1418 | linkchange = ioread32(&u3d->vuc_regs->linkchange); |
| 1419 | iowrite32(linkchange, &u3d->vuc_regs->linkchange); |
| 1420 | |
| 1421 | dev_dbg(u3d->dev, "linkchange: 0x%x\n", linkchange); |
| 1422 | |
| 1423 | if (linkchange & MV_U3D_LINK_CHANGE_LINK_UP) { |
| 1424 | dev_dbg(u3d->dev, "link up: ltssm state: 0x%x\n", |
| 1425 | ioread32(&u3d->vuc_regs->ltssmstate)); |
| 1426 | |
| 1427 | u3d->usb_state = USB_STATE_DEFAULT; |
| 1428 | u3d->ep0_dir = MV_U3D_EP_DIR_OUT; |
| 1429 | u3d->ep0_state = MV_U3D_WAIT_FOR_SETUP; |
| 1430 | |
| 1431 | /* set speed */ |
| 1432 | u3d->gadget.speed = USB_SPEED_SUPER; |
| 1433 | } |
| 1434 | |
| 1435 | if (linkchange & MV_U3D_LINK_CHANGE_SUSPEND) { |
| 1436 | dev_dbg(u3d->dev, "link suspend\n"); |
| 1437 | u3d->resume_state = u3d->usb_state; |
| 1438 | u3d->usb_state = USB_STATE_SUSPENDED; |
| 1439 | } |
| 1440 | |
| 1441 | if (linkchange & MV_U3D_LINK_CHANGE_RESUME) { |
| 1442 | dev_dbg(u3d->dev, "link resume\n"); |
| 1443 | u3d->usb_state = u3d->resume_state; |
| 1444 | u3d->resume_state = 0; |
| 1445 | } |
| 1446 | |
| 1447 | if (linkchange & MV_U3D_LINK_CHANGE_WRESET) { |
| 1448 | dev_dbg(u3d->dev, "warm reset\n"); |
| 1449 | u3d->usb_state = USB_STATE_POWERED; |
| 1450 | } |
| 1451 | |
| 1452 | if (linkchange & MV_U3D_LINK_CHANGE_HRESET) { |
| 1453 | dev_dbg(u3d->dev, "hot reset\n"); |
| 1454 | u3d->usb_state = USB_STATE_DEFAULT; |
| 1455 | } |
| 1456 | |
| 1457 | if (linkchange & MV_U3D_LINK_CHANGE_INACT) |
| 1458 | dev_dbg(u3d->dev, "inactive\n"); |
| 1459 | |
| 1460 | if (linkchange & MV_U3D_LINK_CHANGE_DISABLE_AFTER_U0) |
| 1461 | dev_dbg(u3d->dev, "ss.disabled\n"); |
| 1462 | |
| 1463 | if (linkchange & MV_U3D_LINK_CHANGE_VBUS_INVALID) { |
| 1464 | dev_dbg(u3d->dev, "vbus invalid\n"); |
| 1465 | u3d->usb_state = USB_STATE_ATTACHED; |
| 1466 | u3d->vbus_valid_detect = 1; |
| 1467 | /* if external vbus detect is not supported, |
| 1468 | * we handle it here. |
| 1469 | */ |
| 1470 | if (!u3d->vbus) { |
| 1471 | spin_unlock(&u3d->lock); |
| 1472 | mv_u3d_vbus_session(&u3d->gadget, 0); |
| 1473 | spin_lock(&u3d->lock); |
| 1474 | } |
| 1475 | } |
| 1476 | } |
| 1477 | |
| 1478 | static void mv_u3d_ch9setaddress(struct mv_u3d *u3d, |
| 1479 | struct usb_ctrlrequest *setup) |
| 1480 | { |
| 1481 | u32 tmp; |
| 1482 | |
| 1483 | if (u3d->usb_state != USB_STATE_DEFAULT) { |
| 1484 | dev_err(u3d->dev, |
| 1485 | "%s, cannot setaddr in this state (%d)\n", |
| 1486 | __func__, u3d->usb_state); |
| 1487 | goto err; |
| 1488 | } |
| 1489 | |
| 1490 | u3d->dev_addr = (u8)setup->wValue; |
| 1491 | |
| 1492 | dev_dbg(u3d->dev, "%s: 0x%x\n", __func__, u3d->dev_addr); |
| 1493 | |
| 1494 | if (u3d->dev_addr > 127) { |
| 1495 | dev_err(u3d->dev, |
| 1496 | "%s, u3d address is wrong (out of range)\n", __func__); |
| 1497 | u3d->dev_addr = 0; |
| 1498 | goto err; |
| 1499 | } |
| 1500 | |
| 1501 | /* update usb state */ |
| 1502 | u3d->usb_state = USB_STATE_ADDRESS; |
| 1503 | |
| 1504 | /* set the new address */ |
| 1505 | tmp = ioread32(&u3d->vuc_regs->devaddrtiebrkr); |
| 1506 | tmp &= ~0x7F; |
| 1507 | tmp |= (u32)u3d->dev_addr; |
| 1508 | iowrite32(tmp, &u3d->vuc_regs->devaddrtiebrkr); |
| 1509 | |
| 1510 | return; |
| 1511 | err: |
| 1512 | mv_u3d_ep0_stall(u3d); |
| 1513 | } |
| 1514 | |
| 1515 | static int mv_u3d_is_set_configuration(struct usb_ctrlrequest *setup) |
| 1516 | { |
| 1517 | if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) |
| 1518 | if (setup->bRequest == USB_REQ_SET_CONFIGURATION) |
| 1519 | return 1; |
| 1520 | |
| 1521 | return 0; |
| 1522 | } |
| 1523 | |
| 1524 | static void mv_u3d_handle_setup_packet(struct mv_u3d *u3d, u8 ep_num, |
| 1525 | struct usb_ctrlrequest *setup) |
Felipe Balbi | 6fbb2f7 | 2013-03-22 17:01:42 +0200 | [diff] [blame] | 1526 | __releases(&u3c->lock) |
| 1527 | __acquires(&u3c->lock) |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1528 | { |
| 1529 | bool delegate = false; |
| 1530 | |
| 1531 | mv_u3d_nuke(&u3d->eps[ep_num * 2 + MV_U3D_EP_DIR_IN], -ESHUTDOWN); |
| 1532 | |
| 1533 | dev_dbg(u3d->dev, "SETUP %02x.%02x v%04x i%04x l%04x\n", |
| 1534 | setup->bRequestType, setup->bRequest, |
| 1535 | setup->wValue, setup->wIndex, setup->wLength); |
| 1536 | |
| 1537 | /* We process some stardard setup requests here */ |
| 1538 | if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { |
| 1539 | switch (setup->bRequest) { |
| 1540 | case USB_REQ_GET_STATUS: |
| 1541 | delegate = true; |
| 1542 | break; |
| 1543 | |
| 1544 | case USB_REQ_SET_ADDRESS: |
| 1545 | mv_u3d_ch9setaddress(u3d, setup); |
| 1546 | break; |
| 1547 | |
| 1548 | case USB_REQ_CLEAR_FEATURE: |
| 1549 | delegate = true; |
| 1550 | break; |
| 1551 | |
| 1552 | case USB_REQ_SET_FEATURE: |
| 1553 | delegate = true; |
| 1554 | break; |
| 1555 | |
| 1556 | default: |
| 1557 | delegate = true; |
| 1558 | } |
| 1559 | } else |
| 1560 | delegate = true; |
| 1561 | |
| 1562 | /* delegate USB standard requests to the gadget driver */ |
| 1563 | if (delegate == true) { |
| 1564 | /* USB requests handled by gadget */ |
| 1565 | if (setup->wLength) { |
| 1566 | /* DATA phase from gadget, STATUS phase from u3d */ |
| 1567 | u3d->ep0_dir = (setup->bRequestType & USB_DIR_IN) |
| 1568 | ? MV_U3D_EP_DIR_IN : MV_U3D_EP_DIR_OUT; |
| 1569 | spin_unlock(&u3d->lock); |
| 1570 | if (u3d->driver->setup(&u3d->gadget, |
| 1571 | &u3d->local_setup_buff) < 0) { |
| 1572 | dev_err(u3d->dev, "setup error!\n"); |
| 1573 | mv_u3d_ep0_stall(u3d); |
| 1574 | } |
| 1575 | spin_lock(&u3d->lock); |
| 1576 | } else { |
| 1577 | /* no DATA phase, STATUS phase from gadget */ |
| 1578 | u3d->ep0_dir = MV_U3D_EP_DIR_IN; |
| 1579 | u3d->ep0_state = MV_U3D_STATUS_STAGE; |
| 1580 | spin_unlock(&u3d->lock); |
| 1581 | if (u3d->driver->setup(&u3d->gadget, |
| 1582 | &u3d->local_setup_buff) < 0) |
| 1583 | mv_u3d_ep0_stall(u3d); |
| 1584 | spin_lock(&u3d->lock); |
| 1585 | } |
| 1586 | |
| 1587 | if (mv_u3d_is_set_configuration(setup)) { |
| 1588 | dev_dbg(u3d->dev, "u3d configured\n"); |
| 1589 | u3d->usb_state = USB_STATE_CONFIGURED; |
| 1590 | } |
| 1591 | } |
| 1592 | } |
| 1593 | |
| 1594 | static void mv_u3d_get_setup_data(struct mv_u3d *u3d, u8 ep_num, u8 *buffer_ptr) |
| 1595 | { |
| 1596 | struct mv_u3d_ep_context *epcontext; |
| 1597 | |
| 1598 | epcontext = &u3d->ep_context[ep_num * 2 + MV_U3D_EP_DIR_IN]; |
| 1599 | |
| 1600 | /* Copy the setup packet to local buffer */ |
| 1601 | memcpy(buffer_ptr, (u8 *) &epcontext->setup_buffer, 8); |
| 1602 | } |
| 1603 | |
| 1604 | static void mv_u3d_irq_process_setup(struct mv_u3d *u3d) |
| 1605 | { |
| 1606 | u32 tmp, i; |
| 1607 | /* Process all Setup packet received interrupts */ |
| 1608 | tmp = ioread32(&u3d->vuc_regs->setuplock); |
| 1609 | if (tmp) { |
| 1610 | for (i = 0; i < u3d->max_eps; i++) { |
| 1611 | if (tmp & (1 << i)) { |
| 1612 | mv_u3d_get_setup_data(u3d, i, |
| 1613 | (u8 *)(&u3d->local_setup_buff)); |
| 1614 | mv_u3d_handle_setup_packet(u3d, i, |
| 1615 | &u3d->local_setup_buff); |
| 1616 | } |
| 1617 | } |
| 1618 | } |
| 1619 | |
| 1620 | iowrite32(tmp, &u3d->vuc_regs->setuplock); |
| 1621 | } |
| 1622 | |
| 1623 | static void mv_u3d_irq_process_tr_complete(struct mv_u3d *u3d) |
| 1624 | { |
| 1625 | u32 tmp, bit_pos; |
| 1626 | int i, ep_num = 0, direction = 0; |
| 1627 | struct mv_u3d_ep *curr_ep; |
| 1628 | struct mv_u3d_req *curr_req, *temp_req; |
| 1629 | int status; |
| 1630 | |
| 1631 | tmp = ioread32(&u3d->vuc_regs->endcomplete); |
| 1632 | |
| 1633 | dev_dbg(u3d->dev, "tr_complete: ep: 0x%x\n", tmp); |
| 1634 | if (!tmp) |
| 1635 | return; |
| 1636 | iowrite32(tmp, &u3d->vuc_regs->endcomplete); |
| 1637 | |
| 1638 | for (i = 0; i < u3d->max_eps * 2; i++) { |
| 1639 | ep_num = i >> 1; |
| 1640 | direction = i % 2; |
| 1641 | |
| 1642 | bit_pos = 1 << (ep_num + 16 * direction); |
| 1643 | |
| 1644 | if (!(bit_pos & tmp)) |
| 1645 | continue; |
| 1646 | |
| 1647 | if (i == 0) |
| 1648 | curr_ep = &u3d->eps[1]; |
| 1649 | else |
| 1650 | curr_ep = &u3d->eps[i]; |
| 1651 | |
| 1652 | /* remove req out of ep request list after completion */ |
| 1653 | dev_dbg(u3d->dev, "tr comp: check req_list\n"); |
| 1654 | spin_lock(&curr_ep->req_lock); |
| 1655 | if (!list_empty(&curr_ep->req_list)) { |
| 1656 | struct mv_u3d_req *req; |
| 1657 | req = list_entry(curr_ep->req_list.next, |
| 1658 | struct mv_u3d_req, list); |
| 1659 | list_del_init(&req->list); |
| 1660 | curr_ep->processing = 0; |
| 1661 | } |
| 1662 | spin_unlock(&curr_ep->req_lock); |
| 1663 | |
| 1664 | /* process the req queue until an uncomplete request */ |
| 1665 | list_for_each_entry_safe(curr_req, temp_req, |
| 1666 | &curr_ep->queue, queue) { |
| 1667 | status = mv_u3d_process_ep_req(u3d, i, curr_req); |
| 1668 | if (status) |
| 1669 | break; |
| 1670 | /* write back status to req */ |
| 1671 | curr_req->req.status = status; |
| 1672 | |
| 1673 | /* ep0 request completion */ |
| 1674 | if (ep_num == 0) { |
| 1675 | mv_u3d_done(curr_ep, curr_req, 0); |
| 1676 | break; |
| 1677 | } else { |
| 1678 | mv_u3d_done(curr_ep, curr_req, status); |
| 1679 | } |
| 1680 | } |
| 1681 | |
| 1682 | dev_dbg(u3d->dev, "call mv_u3d_start_queue from ep complete\n"); |
| 1683 | mv_u3d_start_queue(curr_ep); |
| 1684 | } |
| 1685 | } |
| 1686 | |
| 1687 | static irqreturn_t mv_u3d_irq(int irq, void *dev) |
| 1688 | { |
| 1689 | struct mv_u3d *u3d = (struct mv_u3d *)dev; |
| 1690 | u32 status, intr; |
| 1691 | u32 bridgesetting; |
| 1692 | u32 trbunderrun; |
| 1693 | |
| 1694 | spin_lock(&u3d->lock); |
| 1695 | |
| 1696 | status = ioread32(&u3d->vuc_regs->intrcause); |
| 1697 | intr = ioread32(&u3d->vuc_regs->intrenable); |
| 1698 | status &= intr; |
| 1699 | |
| 1700 | if (status == 0) { |
| 1701 | spin_unlock(&u3d->lock); |
| 1702 | dev_err(u3d->dev, "irq error!\n"); |
| 1703 | return IRQ_NONE; |
| 1704 | } |
| 1705 | |
| 1706 | if (status & MV_U3D_USBINT_VBUS_VALID) { |
| 1707 | bridgesetting = ioread32(&u3d->vuc_regs->bridgesetting); |
| 1708 | if (bridgesetting & MV_U3D_BRIDGE_SETTING_VBUS_VALID) { |
| 1709 | /* write vbus valid bit of bridge setting to clear */ |
| 1710 | bridgesetting = MV_U3D_BRIDGE_SETTING_VBUS_VALID; |
| 1711 | iowrite32(bridgesetting, &u3d->vuc_regs->bridgesetting); |
| 1712 | dev_dbg(u3d->dev, "vbus valid\n"); |
| 1713 | |
| 1714 | u3d->usb_state = USB_STATE_POWERED; |
| 1715 | u3d->vbus_valid_detect = 0; |
| 1716 | /* if external vbus detect is not supported, |
| 1717 | * we handle it here. |
| 1718 | */ |
| 1719 | if (!u3d->vbus) { |
| 1720 | spin_unlock(&u3d->lock); |
| 1721 | mv_u3d_vbus_session(&u3d->gadget, 1); |
| 1722 | spin_lock(&u3d->lock); |
| 1723 | } |
| 1724 | } else |
| 1725 | dev_err(u3d->dev, "vbus bit is not set\n"); |
| 1726 | } |
| 1727 | |
| 1728 | /* RX data is already in the 16KB FIFO.*/ |
| 1729 | if (status & MV_U3D_USBINT_UNDER_RUN) { |
| 1730 | trbunderrun = ioread32(&u3d->vuc_regs->trbunderrun); |
| 1731 | dev_err(u3d->dev, "under run, ep%d\n", trbunderrun); |
| 1732 | iowrite32(trbunderrun, &u3d->vuc_regs->trbunderrun); |
| 1733 | mv_u3d_irq_process_error(u3d); |
| 1734 | } |
| 1735 | |
| 1736 | if (status & (MV_U3D_USBINT_RXDESC_ERR | MV_U3D_USBINT_TXDESC_ERR)) { |
| 1737 | /* write one to clear */ |
| 1738 | iowrite32(status & (MV_U3D_USBINT_RXDESC_ERR |
| 1739 | | MV_U3D_USBINT_TXDESC_ERR), |
| 1740 | &u3d->vuc_regs->intrcause); |
| 1741 | dev_err(u3d->dev, "desc err 0x%x\n", status); |
| 1742 | mv_u3d_irq_process_error(u3d); |
| 1743 | } |
| 1744 | |
| 1745 | if (status & MV_U3D_USBINT_LINK_CHG) |
| 1746 | mv_u3d_irq_process_link_change(u3d); |
| 1747 | |
| 1748 | if (status & MV_U3D_USBINT_TX_COMPLETE) |
| 1749 | mv_u3d_irq_process_tr_complete(u3d); |
| 1750 | |
| 1751 | if (status & MV_U3D_USBINT_RX_COMPLETE) |
| 1752 | mv_u3d_irq_process_tr_complete(u3d); |
| 1753 | |
| 1754 | if (status & MV_U3D_USBINT_SETUP) |
| 1755 | mv_u3d_irq_process_setup(u3d); |
| 1756 | |
| 1757 | spin_unlock(&u3d->lock); |
| 1758 | return IRQ_HANDLED; |
| 1759 | } |
| 1760 | |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame] | 1761 | static int mv_u3d_remove(struct platform_device *dev) |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1762 | { |
| 1763 | struct mv_u3d *u3d = platform_get_drvdata(dev); |
| 1764 | |
| 1765 | BUG_ON(u3d == NULL); |
| 1766 | |
| 1767 | usb_del_gadget_udc(&u3d->gadget); |
| 1768 | |
| 1769 | /* free memory allocated in probe */ |
| 1770 | if (u3d->trb_pool) |
| 1771 | dma_pool_destroy(u3d->trb_pool); |
| 1772 | |
| 1773 | if (u3d->ep_context) |
| 1774 | dma_free_coherent(&dev->dev, u3d->ep_context_size, |
| 1775 | u3d->ep_context, u3d->ep_context_dma); |
| 1776 | |
| 1777 | kfree(u3d->eps); |
| 1778 | |
| 1779 | if (u3d->irq) |
Wei Yongjun | 5257a63 | 2013-07-04 21:45:02 +0800 | [diff] [blame] | 1780 | free_irq(u3d->irq, u3d); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1781 | |
| 1782 | if (u3d->cap_regs) |
| 1783 | iounmap(u3d->cap_regs); |
| 1784 | u3d->cap_regs = NULL; |
| 1785 | |
| 1786 | kfree(u3d->status_req); |
| 1787 | |
| 1788 | clk_put(u3d->clk); |
| 1789 | |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1790 | kfree(u3d); |
| 1791 | |
| 1792 | return 0; |
| 1793 | } |
| 1794 | |
| 1795 | static int mv_u3d_probe(struct platform_device *dev) |
| 1796 | { |
| 1797 | struct mv_u3d *u3d = NULL; |
Jingoo Han | e01ee9f | 2013-07-30 17:00:51 +0900 | [diff] [blame] | 1798 | struct mv_usb_platform_data *pdata = dev_get_platdata(&dev->dev); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1799 | int retval = 0; |
| 1800 | struct resource *r; |
| 1801 | size_t size; |
| 1802 | |
Jingoo Han | e01ee9f | 2013-07-30 17:00:51 +0900 | [diff] [blame] | 1803 | if (!dev_get_platdata(&dev->dev)) { |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1804 | dev_err(&dev->dev, "missing platform_data\n"); |
| 1805 | retval = -ENODEV; |
| 1806 | goto err_pdata; |
| 1807 | } |
| 1808 | |
| 1809 | u3d = kzalloc(sizeof(*u3d), GFP_KERNEL); |
| 1810 | if (!u3d) { |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1811 | retval = -ENOMEM; |
| 1812 | goto err_alloc_private; |
| 1813 | } |
| 1814 | |
| 1815 | spin_lock_init(&u3d->lock); |
| 1816 | |
| 1817 | platform_set_drvdata(dev, u3d); |
| 1818 | |
| 1819 | u3d->dev = &dev->dev; |
| 1820 | u3d->vbus = pdata->vbus; |
| 1821 | |
Felipe Balbi | 65cd3f2 | 2013-04-02 11:12:11 +0300 | [diff] [blame] | 1822 | u3d->clk = clk_get(&dev->dev, NULL); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1823 | if (IS_ERR(u3d->clk)) { |
| 1824 | retval = PTR_ERR(u3d->clk); |
| 1825 | goto err_get_clk; |
| 1826 | } |
| 1827 | |
| 1828 | r = platform_get_resource_byname(dev, IORESOURCE_MEM, "capregs"); |
| 1829 | if (!r) { |
| 1830 | dev_err(&dev->dev, "no I/O memory resource defined\n"); |
| 1831 | retval = -ENODEV; |
| 1832 | goto err_get_cap_regs; |
| 1833 | } |
| 1834 | |
| 1835 | u3d->cap_regs = (struct mv_u3d_cap_regs __iomem *) |
| 1836 | ioremap(r->start, resource_size(r)); |
| 1837 | if (!u3d->cap_regs) { |
| 1838 | dev_err(&dev->dev, "failed to map I/O memory\n"); |
| 1839 | retval = -EBUSY; |
| 1840 | goto err_map_cap_regs; |
| 1841 | } else { |
Felipe Balbi | e6667ef | 2013-03-22 09:14:25 +0200 | [diff] [blame] | 1842 | dev_dbg(&dev->dev, "cap_regs address: 0x%lx/0x%lx\n", |
| 1843 | (unsigned long) r->start, |
| 1844 | (unsigned long) u3d->cap_regs); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1845 | } |
| 1846 | |
| 1847 | /* we will access controller register, so enable the u3d controller */ |
| 1848 | clk_enable(u3d->clk); |
| 1849 | |
| 1850 | if (pdata->phy_init) { |
| 1851 | retval = pdata->phy_init(u3d->phy_regs); |
| 1852 | if (retval) { |
| 1853 | dev_err(&dev->dev, "init phy error %d\n", retval); |
| 1854 | goto err_u3d_enable; |
| 1855 | } |
| 1856 | } |
| 1857 | |
Felipe Balbi | e6667ef | 2013-03-22 09:14:25 +0200 | [diff] [blame] | 1858 | u3d->op_regs = (struct mv_u3d_op_regs __iomem *)(u3d->cap_regs |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1859 | + MV_U3D_USB3_OP_REGS_OFFSET); |
| 1860 | |
Felipe Balbi | e6667ef | 2013-03-22 09:14:25 +0200 | [diff] [blame] | 1861 | u3d->vuc_regs = (struct mv_u3d_vuc_regs __iomem *)(u3d->cap_regs |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1862 | + ioread32(&u3d->cap_regs->vuoff)); |
| 1863 | |
| 1864 | u3d->max_eps = 16; |
| 1865 | |
| 1866 | /* |
| 1867 | * some platform will use usb to download image, it may not disconnect |
| 1868 | * usb gadget before loading kernel. So first stop u3d here. |
| 1869 | */ |
| 1870 | mv_u3d_controller_stop(u3d); |
| 1871 | iowrite32(0xFFFFFFFF, &u3d->vuc_regs->intrcause); |
| 1872 | |
| 1873 | if (pdata->phy_deinit) |
| 1874 | pdata->phy_deinit(u3d->phy_regs); |
| 1875 | clk_disable(u3d->clk); |
| 1876 | |
| 1877 | size = u3d->max_eps * sizeof(struct mv_u3d_ep_context) * 2; |
| 1878 | size = (size + MV_U3D_EP_CONTEXT_ALIGNMENT - 1) |
| 1879 | & ~(MV_U3D_EP_CONTEXT_ALIGNMENT - 1); |
| 1880 | u3d->ep_context = dma_alloc_coherent(&dev->dev, size, |
| 1881 | &u3d->ep_context_dma, GFP_KERNEL); |
| 1882 | if (!u3d->ep_context) { |
| 1883 | dev_err(&dev->dev, "allocate ep context memory failed\n"); |
| 1884 | retval = -ENOMEM; |
| 1885 | goto err_alloc_ep_context; |
| 1886 | } |
| 1887 | u3d->ep_context_size = size; |
| 1888 | |
| 1889 | /* create TRB dma_pool resource */ |
| 1890 | u3d->trb_pool = dma_pool_create("u3d_trb", |
| 1891 | &dev->dev, |
| 1892 | sizeof(struct mv_u3d_trb_hw), |
| 1893 | MV_U3D_TRB_ALIGNMENT, |
| 1894 | MV_U3D_DMA_BOUNDARY); |
| 1895 | |
| 1896 | if (!u3d->trb_pool) { |
| 1897 | retval = -ENOMEM; |
| 1898 | goto err_alloc_trb_pool; |
| 1899 | } |
| 1900 | |
| 1901 | size = u3d->max_eps * sizeof(struct mv_u3d_ep) * 2; |
| 1902 | u3d->eps = kzalloc(size, GFP_KERNEL); |
| 1903 | if (!u3d->eps) { |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1904 | retval = -ENOMEM; |
| 1905 | goto err_alloc_eps; |
| 1906 | } |
| 1907 | |
| 1908 | /* initialize ep0 status request structure */ |
| 1909 | u3d->status_req = kzalloc(sizeof(struct mv_u3d_req) + 8, GFP_KERNEL); |
| 1910 | if (!u3d->status_req) { |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1911 | retval = -ENOMEM; |
| 1912 | goto err_alloc_status_req; |
| 1913 | } |
| 1914 | INIT_LIST_HEAD(&u3d->status_req->queue); |
| 1915 | |
| 1916 | /* allocate a small amount of memory to get valid address */ |
| 1917 | u3d->status_req->req.buf = (char *)u3d->status_req |
| 1918 | + sizeof(struct mv_u3d_req); |
| 1919 | u3d->status_req->req.dma = virt_to_phys(u3d->status_req->req.buf); |
| 1920 | |
| 1921 | u3d->resume_state = USB_STATE_NOTATTACHED; |
| 1922 | u3d->usb_state = USB_STATE_ATTACHED; |
| 1923 | u3d->ep0_dir = MV_U3D_EP_DIR_OUT; |
| 1924 | u3d->remote_wakeup = 0; |
| 1925 | |
| 1926 | r = platform_get_resource(dev, IORESOURCE_IRQ, 0); |
| 1927 | if (!r) { |
| 1928 | dev_err(&dev->dev, "no IRQ resource defined\n"); |
| 1929 | retval = -ENODEV; |
| 1930 | goto err_get_irq; |
| 1931 | } |
| 1932 | u3d->irq = r->start; |
| 1933 | if (request_irq(u3d->irq, mv_u3d_irq, |
Michael Opdenacker | dc80757 | 2013-10-06 08:44:35 +0200 | [diff] [blame] | 1934 | IRQF_SHARED, driver_name, u3d)) { |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1935 | u3d->irq = 0; |
| 1936 | dev_err(&dev->dev, "Request irq %d for u3d failed\n", |
| 1937 | u3d->irq); |
| 1938 | retval = -ENODEV; |
| 1939 | goto err_request_irq; |
| 1940 | } |
| 1941 | |
| 1942 | /* initialize gadget structure */ |
| 1943 | u3d->gadget.ops = &mv_u3d_ops; /* usb_gadget_ops */ |
| 1944 | u3d->gadget.ep0 = &u3d->eps[1].ep; /* gadget ep0 */ |
| 1945 | INIT_LIST_HEAD(&u3d->gadget.ep_list); /* ep_list */ |
| 1946 | u3d->gadget.speed = USB_SPEED_UNKNOWN; /* speed */ |
| 1947 | |
| 1948 | /* the "gadget" abstracts/virtualizes the controller */ |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1949 | u3d->gadget.name = driver_name; /* gadget name */ |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1950 | |
| 1951 | mv_u3d_eps_init(u3d); |
| 1952 | |
| 1953 | /* external vbus detection */ |
| 1954 | if (u3d->vbus) { |
| 1955 | u3d->clock_gating = 1; |
| 1956 | dev_err(&dev->dev, "external vbus detection\n"); |
| 1957 | } |
| 1958 | |
| 1959 | if (!u3d->clock_gating) |
| 1960 | u3d->vbus_active = 1; |
| 1961 | |
| 1962 | /* enable usb3 controller vbus detection */ |
| 1963 | u3d->vbus_valid_detect = 1; |
| 1964 | |
| 1965 | retval = usb_add_gadget_udc(&dev->dev, &u3d->gadget); |
| 1966 | if (retval) |
| 1967 | goto err_unregister; |
| 1968 | |
| 1969 | dev_dbg(&dev->dev, "successful probe usb3 device %s clock gating.\n", |
| 1970 | u3d->clock_gating ? "with" : "without"); |
| 1971 | |
| 1972 | return 0; |
| 1973 | |
| 1974 | err_unregister: |
Wei Yongjun | 5257a63 | 2013-07-04 21:45:02 +0800 | [diff] [blame] | 1975 | free_irq(u3d->irq, u3d); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1976 | err_request_irq: |
| 1977 | err_get_irq: |
| 1978 | kfree(u3d->status_req); |
| 1979 | err_alloc_status_req: |
| 1980 | kfree(u3d->eps); |
| 1981 | err_alloc_eps: |
| 1982 | dma_pool_destroy(u3d->trb_pool); |
| 1983 | err_alloc_trb_pool: |
| 1984 | dma_free_coherent(&dev->dev, u3d->ep_context_size, |
| 1985 | u3d->ep_context, u3d->ep_context_dma); |
| 1986 | err_alloc_ep_context: |
| 1987 | if (pdata->phy_deinit) |
| 1988 | pdata->phy_deinit(u3d->phy_regs); |
| 1989 | clk_disable(u3d->clk); |
| 1990 | err_u3d_enable: |
| 1991 | iounmap(u3d->cap_regs); |
| 1992 | err_map_cap_regs: |
| 1993 | err_get_cap_regs: |
| 1994 | err_get_clk: |
| 1995 | clk_put(u3d->clk); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 1996 | kfree(u3d); |
| 1997 | err_alloc_private: |
| 1998 | err_pdata: |
| 1999 | return retval; |
| 2000 | } |
| 2001 | |
Jingoo Han | 4895a2e | 2013-03-19 01:28:56 +0000 | [diff] [blame] | 2002 | #ifdef CONFIG_PM_SLEEP |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 2003 | static int mv_u3d_suspend(struct device *dev) |
| 2004 | { |
| 2005 | struct mv_u3d *u3d = dev_get_drvdata(dev); |
| 2006 | |
| 2007 | /* |
| 2008 | * only cable is unplugged, usb can suspend. |
| 2009 | * So do not care about clock_gating == 1, it is handled by |
| 2010 | * vbus session. |
| 2011 | */ |
| 2012 | if (!u3d->clock_gating) { |
| 2013 | mv_u3d_controller_stop(u3d); |
| 2014 | |
| 2015 | spin_lock_irq(&u3d->lock); |
| 2016 | /* stop all usb activities */ |
| 2017 | mv_u3d_stop_activity(u3d, u3d->driver); |
| 2018 | spin_unlock_irq(&u3d->lock); |
| 2019 | |
| 2020 | mv_u3d_disable(u3d); |
| 2021 | } |
| 2022 | |
| 2023 | return 0; |
| 2024 | } |
| 2025 | |
| 2026 | static int mv_u3d_resume(struct device *dev) |
| 2027 | { |
| 2028 | struct mv_u3d *u3d = dev_get_drvdata(dev); |
| 2029 | int retval; |
| 2030 | |
| 2031 | if (!u3d->clock_gating) { |
| 2032 | retval = mv_u3d_enable(u3d); |
| 2033 | if (retval) |
| 2034 | return retval; |
| 2035 | |
| 2036 | if (u3d->driver && u3d->softconnect) { |
| 2037 | mv_u3d_controller_reset(u3d); |
| 2038 | mv_u3d_ep0_reset(u3d); |
| 2039 | mv_u3d_controller_start(u3d); |
| 2040 | } |
| 2041 | } |
| 2042 | |
| 2043 | return 0; |
| 2044 | } |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 2045 | #endif |
| 2046 | |
Jingoo Han | 4895a2e | 2013-03-19 01:28:56 +0000 | [diff] [blame] | 2047 | static SIMPLE_DEV_PM_OPS(mv_u3d_pm_ops, mv_u3d_suspend, mv_u3d_resume); |
| 2048 | |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 2049 | static void mv_u3d_shutdown(struct platform_device *dev) |
| 2050 | { |
Jingoo Han | dae8ead | 2013-05-23 19:19:22 +0900 | [diff] [blame] | 2051 | struct mv_u3d *u3d = platform_get_drvdata(dev); |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 2052 | u32 tmp; |
| 2053 | |
| 2054 | tmp = ioread32(&u3d->op_regs->usbcmd); |
| 2055 | tmp &= ~MV_U3D_CMD_RUN_STOP; |
| 2056 | iowrite32(tmp, &u3d->op_regs->usbcmd); |
| 2057 | } |
| 2058 | |
| 2059 | static struct platform_driver mv_u3d_driver = { |
| 2060 | .probe = mv_u3d_probe, |
Felipe Balbi | 2cd807e | 2013-01-24 16:38:19 +0200 | [diff] [blame] | 2061 | .remove = mv_u3d_remove, |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 2062 | .shutdown = mv_u3d_shutdown, |
| 2063 | .driver = { |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 2064 | .name = "mv-u3d", |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 2065 | .pm = &mv_u3d_pm_ops, |
Yu Xu | 3d4eb9d | 2012-06-15 21:45:08 +0800 | [diff] [blame] | 2066 | }, |
| 2067 | }; |
| 2068 | |
| 2069 | module_platform_driver(mv_u3d_driver); |
| 2070 | MODULE_ALIAS("platform:mv-u3d"); |
| 2071 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 2072 | MODULE_AUTHOR("Yu Xu <yuxu@marvell.com>"); |
| 2073 | MODULE_LICENSE("GPL"); |