| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * FOTG210 UDC Driver supports Bulk transfer so far |
| 4 | * |
| 5 | * Copyright (C) 2013 Faraday Technology Corporation |
| 6 | * |
| 7 | * Author : Yuan-Hsin Chen <yhchen@faraday-tech.com> |
| 8 | */ |
| 9 | |
| 10 | #include <linux/dma-mapping.h> |
| 11 | #include <linux/err.h> |
| 12 | #include <linux/interrupt.h> |
| 13 | #include <linux/io.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/platform_device.h> |
| 16 | #include <linux/usb/ch9.h> |
| 17 | #include <linux/usb/gadget.h> |
| 18 | #include <linux/clk.h> |
| 19 | #include <linux/usb/otg.h> |
| 20 | #include <linux/usb/phy.h> |
| 21 | |
| 22 | #include "fotg210.h" |
| 23 | #include "fotg210-udc.h" |
| 24 | |
| 25 | #define DRIVER_DESC "FOTG210 USB Device Controller Driver" |
| 26 | #define DRIVER_VERSION "30-April-2013" |
| 27 | |
| 28 | static const char udc_name[] = "fotg210_udc"; |
| 29 | static const char * const fotg210_ep_name[] = { |
| 30 | "ep0", "ep1", "ep2", "ep3", "ep4"}; |
| 31 | |
| 32 | static void fotg210_disable_fifo_int(struct fotg210_ep *ep) |
| 33 | { |
| 34 | u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR1); |
| 35 | |
| 36 | if (ep->dir_in) |
| 37 | value |= DMISGR1_MF_IN_INT(ep->epnum - 1); |
| 38 | else |
| 39 | value |= DMISGR1_MF_OUTSPK_INT(ep->epnum - 1); |
| 40 | iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR1); |
| 41 | } |
| 42 | |
| 43 | static void fotg210_enable_fifo_int(struct fotg210_ep *ep) |
| 44 | { |
| 45 | u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR1); |
| 46 | |
| 47 | if (ep->dir_in) |
| 48 | value &= ~DMISGR1_MF_IN_INT(ep->epnum - 1); |
| 49 | else |
| 50 | value &= ~DMISGR1_MF_OUTSPK_INT(ep->epnum - 1); |
| 51 | iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR1); |
| 52 | } |
| 53 | |
| 54 | static void fotg210_set_cxdone(struct fotg210_udc *fotg210) |
| 55 | { |
| 56 | u32 value = ioread32(fotg210->reg + FOTG210_DCFESR); |
| 57 | |
| 58 | value |= DCFESR_CX_DONE; |
| 59 | iowrite32(value, fotg210->reg + FOTG210_DCFESR); |
| 60 | } |
| 61 | |
| 62 | static void fotg210_done(struct fotg210_ep *ep, struct fotg210_request *req, |
| 63 | int status) |
| 64 | { |
| 65 | list_del_init(&req->queue); |
| 66 | |
| 67 | /* don't modify queue heads during completion callback */ |
| 68 | if (ep->fotg210->gadget.speed == USB_SPEED_UNKNOWN) |
| 69 | req->req.status = -ESHUTDOWN; |
| 70 | else |
| 71 | req->req.status = status; |
| 72 | |
| 73 | spin_unlock(&ep->fotg210->lock); |
| 74 | usb_gadget_giveback_request(&ep->ep, &req->req); |
| 75 | spin_lock(&ep->fotg210->lock); |
| 76 | |
| 77 | if (ep->epnum) { |
| 78 | if (list_empty(&ep->queue)) |
| 79 | fotg210_disable_fifo_int(ep); |
| 80 | } else { |
| 81 | fotg210_set_cxdone(ep->fotg210); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | static void fotg210_fifo_ep_mapping(struct fotg210_ep *ep, u32 epnum, |
| 86 | u32 dir_in) |
| 87 | { |
| 88 | struct fotg210_udc *fotg210 = ep->fotg210; |
| 89 | u32 val; |
| 90 | |
| 91 | /* Driver should map an ep to a fifo and then map the fifo |
| 92 | * to the ep. What a brain-damaged design! |
| 93 | */ |
| 94 | |
| 95 | /* map a fifo to an ep */ |
| 96 | val = ioread32(fotg210->reg + FOTG210_EPMAP); |
| 97 | val &= ~EPMAP_FIFONOMSK(epnum, dir_in); |
| 98 | val |= EPMAP_FIFONO(epnum, dir_in); |
| 99 | iowrite32(val, fotg210->reg + FOTG210_EPMAP); |
| 100 | |
| 101 | /* map the ep to the fifo */ |
| 102 | val = ioread32(fotg210->reg + FOTG210_FIFOMAP); |
| 103 | val &= ~FIFOMAP_EPNOMSK(epnum); |
| 104 | val |= FIFOMAP_EPNO(epnum); |
| 105 | iowrite32(val, fotg210->reg + FOTG210_FIFOMAP); |
| 106 | |
| 107 | /* enable fifo */ |
| 108 | val = ioread32(fotg210->reg + FOTG210_FIFOCF); |
| 109 | val |= FIFOCF_FIFO_EN(epnum - 1); |
| 110 | iowrite32(val, fotg210->reg + FOTG210_FIFOCF); |
| 111 | } |
| 112 | |
| 113 | static void fotg210_set_fifo_dir(struct fotg210_ep *ep, u32 epnum, u32 dir_in) |
| 114 | { |
| 115 | struct fotg210_udc *fotg210 = ep->fotg210; |
| 116 | u32 val; |
| 117 | |
| 118 | val = ioread32(fotg210->reg + FOTG210_FIFOMAP); |
| 119 | val |= (dir_in ? FIFOMAP_DIRIN(epnum - 1) : FIFOMAP_DIROUT(epnum - 1)); |
| 120 | iowrite32(val, fotg210->reg + FOTG210_FIFOMAP); |
| 121 | } |
| 122 | |
| 123 | static void fotg210_set_tfrtype(struct fotg210_ep *ep, u32 epnum, u32 type) |
| 124 | { |
| 125 | struct fotg210_udc *fotg210 = ep->fotg210; |
| 126 | u32 val; |
| 127 | |
| 128 | val = ioread32(fotg210->reg + FOTG210_FIFOCF); |
| 129 | val |= FIFOCF_TYPE(type, epnum - 1); |
| 130 | iowrite32(val, fotg210->reg + FOTG210_FIFOCF); |
| 131 | } |
| 132 | |
| 133 | static void fotg210_set_mps(struct fotg210_ep *ep, u32 epnum, u32 mps, |
| 134 | u32 dir_in) |
| 135 | { |
| 136 | struct fotg210_udc *fotg210 = ep->fotg210; |
| 137 | u32 val; |
| 138 | u32 offset = dir_in ? FOTG210_INEPMPSR(epnum) : |
| 139 | FOTG210_OUTEPMPSR(epnum); |
| 140 | |
| 141 | val = ioread32(fotg210->reg + offset); |
| 142 | val |= INOUTEPMPSR_MPS(mps); |
| 143 | iowrite32(val, fotg210->reg + offset); |
| 144 | } |
| 145 | |
| 146 | static int fotg210_config_ep(struct fotg210_ep *ep, |
| 147 | const struct usb_endpoint_descriptor *desc) |
| 148 | { |
| 149 | struct fotg210_udc *fotg210 = ep->fotg210; |
| 150 | |
| 151 | fotg210_set_fifo_dir(ep, ep->epnum, ep->dir_in); |
| 152 | fotg210_set_tfrtype(ep, ep->epnum, ep->type); |
| 153 | fotg210_set_mps(ep, ep->epnum, ep->ep.maxpacket, ep->dir_in); |
| 154 | fotg210_fifo_ep_mapping(ep, ep->epnum, ep->dir_in); |
| 155 | |
| 156 | fotg210->ep[ep->epnum] = ep; |
| 157 | |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | static int fotg210_ep_enable(struct usb_ep *_ep, |
| 162 | const struct usb_endpoint_descriptor *desc) |
| 163 | { |
| 164 | struct fotg210_ep *ep; |
| 165 | |
| 166 | ep = container_of(_ep, struct fotg210_ep, ep); |
| 167 | |
| 168 | ep->desc = desc; |
| 169 | ep->epnum = usb_endpoint_num(desc); |
| 170 | ep->type = usb_endpoint_type(desc); |
| 171 | ep->dir_in = usb_endpoint_dir_in(desc); |
| 172 | ep->ep.maxpacket = usb_endpoint_maxp(desc); |
| 173 | |
| 174 | return fotg210_config_ep(ep, desc); |
| 175 | } |
| 176 | |
| 177 | static void fotg210_reset_tseq(struct fotg210_udc *fotg210, u8 epnum) |
| 178 | { |
| 179 | struct fotg210_ep *ep = fotg210->ep[epnum]; |
| 180 | u32 value; |
| 181 | void __iomem *reg; |
| 182 | |
| 183 | reg = (ep->dir_in) ? |
| 184 | fotg210->reg + FOTG210_INEPMPSR(epnum) : |
| 185 | fotg210->reg + FOTG210_OUTEPMPSR(epnum); |
| 186 | |
| 187 | /* Note: Driver needs to set and clear INOUTEPMPSR_RESET_TSEQ |
| 188 | * bit. Controller wouldn't clear this bit. WTF!!! |
| 189 | */ |
| 190 | |
| 191 | value = ioread32(reg); |
| 192 | value |= INOUTEPMPSR_RESET_TSEQ; |
| 193 | iowrite32(value, reg); |
| 194 | |
| 195 | value = ioread32(reg); |
| 196 | value &= ~INOUTEPMPSR_RESET_TSEQ; |
| 197 | iowrite32(value, reg); |
| 198 | } |
| 199 | |
| 200 | static int fotg210_ep_release(struct fotg210_ep *ep) |
| 201 | { |
| 202 | if (!ep->epnum) |
| 203 | return 0; |
| 204 | ep->epnum = 0; |
| 205 | ep->stall = 0; |
| 206 | ep->wedged = 0; |
| 207 | |
| 208 | fotg210_reset_tseq(ep->fotg210, ep->epnum); |
| 209 | |
| 210 | return 0; |
| 211 | } |
| 212 | |
| 213 | static int fotg210_ep_disable(struct usb_ep *_ep) |
| 214 | { |
| 215 | struct fotg210_ep *ep; |
| 216 | struct fotg210_request *req; |
| 217 | unsigned long flags; |
| 218 | |
| 219 | BUG_ON(!_ep); |
| 220 | |
| 221 | ep = container_of(_ep, struct fotg210_ep, ep); |
| 222 | |
| 223 | while (!list_empty(&ep->queue)) { |
| 224 | req = list_entry(ep->queue.next, |
| 225 | struct fotg210_request, queue); |
| 226 | spin_lock_irqsave(&ep->fotg210->lock, flags); |
| 227 | fotg210_done(ep, req, -ECONNRESET); |
| 228 | spin_unlock_irqrestore(&ep->fotg210->lock, flags); |
| 229 | } |
| 230 | |
| 231 | return fotg210_ep_release(ep); |
| 232 | } |
| 233 | |
| 234 | static struct usb_request *fotg210_ep_alloc_request(struct usb_ep *_ep, |
| 235 | gfp_t gfp_flags) |
| 236 | { |
| 237 | struct fotg210_request *req; |
| 238 | |
| 239 | req = kzalloc(sizeof(struct fotg210_request), gfp_flags); |
| 240 | if (!req) |
| 241 | return NULL; |
| 242 | |
| 243 | INIT_LIST_HEAD(&req->queue); |
| 244 | |
| 245 | return &req->req; |
| 246 | } |
| 247 | |
| 248 | static void fotg210_ep_free_request(struct usb_ep *_ep, |
| 249 | struct usb_request *_req) |
| 250 | { |
| 251 | struct fotg210_request *req; |
| 252 | |
| 253 | req = container_of(_req, struct fotg210_request, req); |
| 254 | kfree(req); |
| 255 | } |
| 256 | |
| 257 | static void fotg210_enable_dma(struct fotg210_ep *ep, |
| 258 | dma_addr_t d, u32 len) |
| 259 | { |
| 260 | u32 value; |
| 261 | struct fotg210_udc *fotg210 = ep->fotg210; |
| 262 | |
| 263 | /* set transfer length and direction */ |
| 264 | value = ioread32(fotg210->reg + FOTG210_DMACPSR1); |
| 265 | value &= ~(DMACPSR1_DMA_LEN(0xFFFF) | DMACPSR1_DMA_TYPE(1)); |
| 266 | value |= DMACPSR1_DMA_LEN(len) | DMACPSR1_DMA_TYPE(ep->dir_in); |
| 267 | iowrite32(value, fotg210->reg + FOTG210_DMACPSR1); |
| 268 | |
| 269 | /* set device DMA target FIFO number */ |
| 270 | value = ioread32(fotg210->reg + FOTG210_DMATFNR); |
| 271 | if (ep->epnum) |
| 272 | value |= DMATFNR_ACC_FN(ep->epnum - 1); |
| 273 | else |
| 274 | value |= DMATFNR_ACC_CXF; |
| 275 | iowrite32(value, fotg210->reg + FOTG210_DMATFNR); |
| 276 | |
| 277 | /* set DMA memory address */ |
| 278 | iowrite32(d, fotg210->reg + FOTG210_DMACPSR2); |
| 279 | |
| 280 | /* enable MDMA_EROR and MDMA_CMPLT interrupt */ |
| 281 | value = ioread32(fotg210->reg + FOTG210_DMISGR2); |
| 282 | value &= ~(DMISGR2_MDMA_CMPLT | DMISGR2_MDMA_ERROR); |
| 283 | iowrite32(value, fotg210->reg + FOTG210_DMISGR2); |
| 284 | |
| 285 | /* start DMA */ |
| 286 | value = ioread32(fotg210->reg + FOTG210_DMACPSR1); |
| 287 | value |= DMACPSR1_DMA_START; |
| 288 | iowrite32(value, fotg210->reg + FOTG210_DMACPSR1); |
| 289 | } |
| 290 | |
| 291 | static void fotg210_disable_dma(struct fotg210_ep *ep) |
| 292 | { |
| 293 | iowrite32(DMATFNR_DISDMA, ep->fotg210->reg + FOTG210_DMATFNR); |
| 294 | } |
| 295 | |
| 296 | static void fotg210_wait_dma_done(struct fotg210_ep *ep) |
| 297 | { |
| 298 | u32 value; |
| 299 | |
| 300 | do { |
| 301 | value = ioread32(ep->fotg210->reg + FOTG210_DISGR2); |
| 302 | if ((value & DISGR2_USBRST_INT) || |
| 303 | (value & DISGR2_DMA_ERROR)) |
| 304 | goto dma_reset; |
| 305 | } while (!(value & DISGR2_DMA_CMPLT)); |
| 306 | |
| 307 | value &= ~DISGR2_DMA_CMPLT; |
| 308 | iowrite32(value, ep->fotg210->reg + FOTG210_DISGR2); |
| 309 | return; |
| 310 | |
| 311 | dma_reset: |
| 312 | value = ioread32(ep->fotg210->reg + FOTG210_DMACPSR1); |
| 313 | value |= DMACPSR1_DMA_ABORT; |
| 314 | iowrite32(value, ep->fotg210->reg + FOTG210_DMACPSR1); |
| 315 | |
| 316 | /* reset fifo */ |
| 317 | if (ep->epnum) { |
| 318 | value = ioread32(ep->fotg210->reg + |
| 319 | FOTG210_FIBCR(ep->epnum - 1)); |
| 320 | value |= FIBCR_FFRST; |
| 321 | iowrite32(value, ep->fotg210->reg + |
| 322 | FOTG210_FIBCR(ep->epnum - 1)); |
| 323 | } else { |
| 324 | value = ioread32(ep->fotg210->reg + FOTG210_DCFESR); |
| 325 | value |= DCFESR_CX_CLR; |
| 326 | iowrite32(value, ep->fotg210->reg + FOTG210_DCFESR); |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | static void fotg210_start_dma(struct fotg210_ep *ep, |
| 331 | struct fotg210_request *req) |
| 332 | { |
| 333 | struct device *dev = &ep->fotg210->gadget.dev; |
| 334 | dma_addr_t d; |
| 335 | u8 *buffer; |
| 336 | u32 length; |
| 337 | |
| 338 | if (ep->epnum) { |
| 339 | if (ep->dir_in) { |
| 340 | buffer = req->req.buf; |
| 341 | length = req->req.length; |
| 342 | } else { |
| 343 | buffer = req->req.buf + req->req.actual; |
| 344 | length = ioread32(ep->fotg210->reg + |
| 345 | FOTG210_FIBCR(ep->epnum - 1)) & FIBCR_BCFX; |
| 346 | if (length > req->req.length - req->req.actual) |
| 347 | length = req->req.length - req->req.actual; |
| 348 | } |
| 349 | } else { |
| 350 | buffer = req->req.buf + req->req.actual; |
| 351 | if (req->req.length - req->req.actual > ep->ep.maxpacket) |
| 352 | length = ep->ep.maxpacket; |
| 353 | else |
| 354 | length = req->req.length - req->req.actual; |
| 355 | } |
| 356 | |
| 357 | d = dma_map_single(dev, buffer, length, |
| 358 | ep->dir_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| 359 | |
| 360 | if (dma_mapping_error(dev, d)) { |
| 361 | pr_err("dma_mapping_error\n"); |
| 362 | return; |
| 363 | } |
| 364 | |
| 365 | fotg210_enable_dma(ep, d, length); |
| 366 | |
| 367 | /* check if dma is done */ |
| 368 | fotg210_wait_dma_done(ep); |
| 369 | |
| 370 | fotg210_disable_dma(ep); |
| 371 | |
| 372 | /* update actual transfer length */ |
| 373 | req->req.actual += length; |
| 374 | |
| 375 | dma_unmap_single(dev, d, length, DMA_TO_DEVICE); |
| 376 | } |
| 377 | |
| 378 | static void fotg210_ep0_queue(struct fotg210_ep *ep, |
| 379 | struct fotg210_request *req) |
| 380 | { |
| 381 | if (!req->req.length) { |
| 382 | fotg210_done(ep, req, 0); |
| 383 | return; |
| 384 | } |
| 385 | if (ep->dir_in) { /* if IN */ |
| 386 | fotg210_start_dma(ep, req); |
| 387 | if (req->req.length == req->req.actual) |
| 388 | fotg210_done(ep, req, 0); |
| 389 | } else { /* OUT */ |
| 390 | u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR0); |
| 391 | |
| 392 | value &= ~DMISGR0_MCX_OUT_INT; |
| 393 | iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR0); |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | static int fotg210_ep_queue(struct usb_ep *_ep, struct usb_request *_req, |
| 398 | gfp_t gfp_flags) |
| 399 | { |
| 400 | struct fotg210_ep *ep; |
| 401 | struct fotg210_request *req; |
| 402 | unsigned long flags; |
| 403 | int request = 0; |
| 404 | |
| 405 | ep = container_of(_ep, struct fotg210_ep, ep); |
| 406 | req = container_of(_req, struct fotg210_request, req); |
| 407 | |
| 408 | if (ep->fotg210->gadget.speed == USB_SPEED_UNKNOWN) |
| 409 | return -ESHUTDOWN; |
| 410 | |
| 411 | spin_lock_irqsave(&ep->fotg210->lock, flags); |
| 412 | |
| 413 | if (list_empty(&ep->queue)) |
| 414 | request = 1; |
| 415 | |
| 416 | list_add_tail(&req->queue, &ep->queue); |
| 417 | |
| 418 | req->req.actual = 0; |
| 419 | req->req.status = -EINPROGRESS; |
| 420 | |
| 421 | if (!ep->epnum) /* ep0 */ |
| 422 | fotg210_ep0_queue(ep, req); |
| 423 | else if (request && !ep->stall) |
| 424 | fotg210_enable_fifo_int(ep); |
| 425 | |
| 426 | spin_unlock_irqrestore(&ep->fotg210->lock, flags); |
| 427 | |
| 428 | return 0; |
| 429 | } |
| 430 | |
| 431 | static int fotg210_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| 432 | { |
| 433 | struct fotg210_ep *ep; |
| 434 | struct fotg210_request *req; |
| 435 | unsigned long flags; |
| 436 | |
| 437 | ep = container_of(_ep, struct fotg210_ep, ep); |
| 438 | req = container_of(_req, struct fotg210_request, req); |
| 439 | |
| 440 | spin_lock_irqsave(&ep->fotg210->lock, flags); |
| 441 | if (!list_empty(&ep->queue)) |
| 442 | fotg210_done(ep, req, -ECONNRESET); |
| 443 | spin_unlock_irqrestore(&ep->fotg210->lock, flags); |
| 444 | |
| 445 | return 0; |
| 446 | } |
| 447 | |
| 448 | static void fotg210_set_epnstall(struct fotg210_ep *ep) |
| 449 | { |
| 450 | struct fotg210_udc *fotg210 = ep->fotg210; |
| 451 | u32 value; |
| 452 | void __iomem *reg; |
| 453 | |
| 454 | /* check if IN FIFO is empty before stall */ |
| 455 | if (ep->dir_in) { |
| 456 | do { |
| 457 | value = ioread32(fotg210->reg + FOTG210_DCFESR); |
| 458 | } while (!(value & DCFESR_FIFO_EMPTY(ep->epnum - 1))); |
| 459 | } |
| 460 | |
| 461 | reg = (ep->dir_in) ? |
| 462 | fotg210->reg + FOTG210_INEPMPSR(ep->epnum) : |
| 463 | fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum); |
| 464 | value = ioread32(reg); |
| 465 | value |= INOUTEPMPSR_STL_EP; |
| 466 | iowrite32(value, reg); |
| 467 | } |
| 468 | |
| 469 | static void fotg210_clear_epnstall(struct fotg210_ep *ep) |
| 470 | { |
| 471 | struct fotg210_udc *fotg210 = ep->fotg210; |
| 472 | u32 value; |
| 473 | void __iomem *reg; |
| 474 | |
| 475 | reg = (ep->dir_in) ? |
| 476 | fotg210->reg + FOTG210_INEPMPSR(ep->epnum) : |
| 477 | fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum); |
| 478 | value = ioread32(reg); |
| 479 | value &= ~INOUTEPMPSR_STL_EP; |
| 480 | iowrite32(value, reg); |
| 481 | } |
| 482 | |
| 483 | static int fotg210_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedge) |
| 484 | { |
| 485 | struct fotg210_ep *ep; |
| 486 | struct fotg210_udc *fotg210; |
| 487 | unsigned long flags; |
| 488 | |
| 489 | ep = container_of(_ep, struct fotg210_ep, ep); |
| 490 | |
| 491 | fotg210 = ep->fotg210; |
| 492 | |
| 493 | spin_lock_irqsave(&ep->fotg210->lock, flags); |
| 494 | |
| 495 | if (value) { |
| 496 | fotg210_set_epnstall(ep); |
| 497 | ep->stall = 1; |
| 498 | if (wedge) |
| 499 | ep->wedged = 1; |
| 500 | } else { |
| 501 | fotg210_reset_tseq(fotg210, ep->epnum); |
| 502 | fotg210_clear_epnstall(ep); |
| 503 | ep->stall = 0; |
| 504 | ep->wedged = 0; |
| 505 | if (!list_empty(&ep->queue)) |
| 506 | fotg210_enable_fifo_int(ep); |
| 507 | } |
| 508 | |
| 509 | spin_unlock_irqrestore(&ep->fotg210->lock, flags); |
| 510 | return 0; |
| 511 | } |
| 512 | |
| 513 | static int fotg210_ep_set_halt(struct usb_ep *_ep, int value) |
| 514 | { |
| 515 | return fotg210_set_halt_and_wedge(_ep, value, 0); |
| 516 | } |
| 517 | |
| 518 | static int fotg210_ep_set_wedge(struct usb_ep *_ep) |
| 519 | { |
| 520 | return fotg210_set_halt_and_wedge(_ep, 1, 1); |
| 521 | } |
| 522 | |
| 523 | static void fotg210_ep_fifo_flush(struct usb_ep *_ep) |
| 524 | { |
| 525 | } |
| 526 | |
| 527 | static const struct usb_ep_ops fotg210_ep_ops = { |
| 528 | .enable = fotg210_ep_enable, |
| 529 | .disable = fotg210_ep_disable, |
| 530 | |
| 531 | .alloc_request = fotg210_ep_alloc_request, |
| 532 | .free_request = fotg210_ep_free_request, |
| 533 | |
| 534 | .queue = fotg210_ep_queue, |
| 535 | .dequeue = fotg210_ep_dequeue, |
| 536 | |
| 537 | .set_halt = fotg210_ep_set_halt, |
| 538 | .fifo_flush = fotg210_ep_fifo_flush, |
| 539 | .set_wedge = fotg210_ep_set_wedge, |
| 540 | }; |
| 541 | |
| 542 | static void fotg210_clear_tx0byte(struct fotg210_udc *fotg210) |
| 543 | { |
| 544 | u32 value = ioread32(fotg210->reg + FOTG210_TX0BYTE); |
| 545 | |
| 546 | value &= ~(TX0BYTE_EP1 | TX0BYTE_EP2 | TX0BYTE_EP3 |
| 547 | | TX0BYTE_EP4); |
| 548 | iowrite32(value, fotg210->reg + FOTG210_TX0BYTE); |
| 549 | } |
| 550 | |
| 551 | static void fotg210_clear_rx0byte(struct fotg210_udc *fotg210) |
| 552 | { |
| 553 | u32 value = ioread32(fotg210->reg + FOTG210_RX0BYTE); |
| 554 | |
| 555 | value &= ~(RX0BYTE_EP1 | RX0BYTE_EP2 | RX0BYTE_EP3 |
| 556 | | RX0BYTE_EP4); |
| 557 | iowrite32(value, fotg210->reg + FOTG210_RX0BYTE); |
| 558 | } |
| 559 | |
| 560 | /* read 8-byte setup packet only */ |
| 561 | static void fotg210_rdsetupp(struct fotg210_udc *fotg210, |
| 562 | u8 *buffer) |
| 563 | { |
| 564 | int i = 0; |
| 565 | u8 *tmp = buffer; |
| 566 | u32 data; |
| 567 | u32 length = 8; |
| 568 | |
| 569 | iowrite32(DMATFNR_ACC_CXF, fotg210->reg + FOTG210_DMATFNR); |
| 570 | |
| 571 | for (i = (length >> 2); i > 0; i--) { |
| 572 | data = ioread32(fotg210->reg + FOTG210_CXPORT); |
| 573 | *tmp = data & 0xFF; |
| 574 | *(tmp + 1) = (data >> 8) & 0xFF; |
| 575 | *(tmp + 2) = (data >> 16) & 0xFF; |
| 576 | *(tmp + 3) = (data >> 24) & 0xFF; |
| 577 | tmp = tmp + 4; |
| 578 | } |
| 579 | |
| 580 | switch (length % 4) { |
| 581 | case 1: |
| 582 | data = ioread32(fotg210->reg + FOTG210_CXPORT); |
| 583 | *tmp = data & 0xFF; |
| 584 | break; |
| 585 | case 2: |
| 586 | data = ioread32(fotg210->reg + FOTG210_CXPORT); |
| 587 | *tmp = data & 0xFF; |
| 588 | *(tmp + 1) = (data >> 8) & 0xFF; |
| 589 | break; |
| 590 | case 3: |
| 591 | data = ioread32(fotg210->reg + FOTG210_CXPORT); |
| 592 | *tmp = data & 0xFF; |
| 593 | *(tmp + 1) = (data >> 8) & 0xFF; |
| 594 | *(tmp + 2) = (data >> 16) & 0xFF; |
| 595 | break; |
| 596 | default: |
| 597 | break; |
| 598 | } |
| 599 | |
| 600 | iowrite32(DMATFNR_DISDMA, fotg210->reg + FOTG210_DMATFNR); |
| 601 | } |
| 602 | |
| 603 | static void fotg210_set_configuration(struct fotg210_udc *fotg210) |
| 604 | { |
| 605 | u32 value = ioread32(fotg210->reg + FOTG210_DAR); |
| 606 | |
| 607 | value |= DAR_AFT_CONF; |
| 608 | iowrite32(value, fotg210->reg + FOTG210_DAR); |
| 609 | } |
| 610 | |
| 611 | static void fotg210_set_dev_addr(struct fotg210_udc *fotg210, u32 addr) |
| 612 | { |
| 613 | u32 value = ioread32(fotg210->reg + FOTG210_DAR); |
| 614 | |
| 615 | value |= (addr & 0x7F); |
| 616 | iowrite32(value, fotg210->reg + FOTG210_DAR); |
| 617 | } |
| 618 | |
| 619 | static void fotg210_set_cxstall(struct fotg210_udc *fotg210) |
| 620 | { |
| 621 | u32 value = ioread32(fotg210->reg + FOTG210_DCFESR); |
| 622 | |
| 623 | value |= DCFESR_CX_STL; |
| 624 | iowrite32(value, fotg210->reg + FOTG210_DCFESR); |
| 625 | } |
| 626 | |
| 627 | static void fotg210_request_error(struct fotg210_udc *fotg210) |
| 628 | { |
| 629 | fotg210_set_cxstall(fotg210); |
| 630 | pr_err("request error!!\n"); |
| 631 | } |
| 632 | |
| 633 | static void fotg210_set_address(struct fotg210_udc *fotg210, |
| 634 | struct usb_ctrlrequest *ctrl) |
| 635 | { |
| 636 | if (le16_to_cpu(ctrl->wValue) >= 0x0100) { |
| 637 | fotg210_request_error(fotg210); |
| 638 | } else { |
| 639 | fotg210_set_dev_addr(fotg210, le16_to_cpu(ctrl->wValue)); |
| 640 | fotg210_set_cxdone(fotg210); |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | static void fotg210_set_feature(struct fotg210_udc *fotg210, |
| 645 | struct usb_ctrlrequest *ctrl) |
| 646 | { |
| 647 | switch (ctrl->bRequestType & USB_RECIP_MASK) { |
| 648 | case USB_RECIP_DEVICE: |
| 649 | fotg210_set_cxdone(fotg210); |
| 650 | break; |
| 651 | case USB_RECIP_INTERFACE: |
| 652 | fotg210_set_cxdone(fotg210); |
| 653 | break; |
| 654 | case USB_RECIP_ENDPOINT: { |
| 655 | u8 epnum; |
| 656 | epnum = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; |
| 657 | if (epnum) |
| 658 | fotg210_set_epnstall(fotg210->ep[epnum]); |
| 659 | else |
| 660 | fotg210_set_cxstall(fotg210); |
| 661 | fotg210_set_cxdone(fotg210); |
| 662 | } |
| 663 | break; |
| 664 | default: |
| 665 | fotg210_request_error(fotg210); |
| 666 | break; |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | static void fotg210_clear_feature(struct fotg210_udc *fotg210, |
| 671 | struct usb_ctrlrequest *ctrl) |
| 672 | { |
| 673 | struct fotg210_ep *ep = |
| 674 | fotg210->ep[ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK]; |
| 675 | |
| 676 | switch (ctrl->bRequestType & USB_RECIP_MASK) { |
| 677 | case USB_RECIP_DEVICE: |
| 678 | fotg210_set_cxdone(fotg210); |
| 679 | break; |
| 680 | case USB_RECIP_INTERFACE: |
| 681 | fotg210_set_cxdone(fotg210); |
| 682 | break; |
| 683 | case USB_RECIP_ENDPOINT: |
| 684 | if (ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK) { |
| 685 | if (ep->wedged) { |
| 686 | fotg210_set_cxdone(fotg210); |
| 687 | break; |
| 688 | } |
| 689 | if (ep->stall) |
| 690 | fotg210_set_halt_and_wedge(&ep->ep, 0, 0); |
| 691 | } |
| 692 | fotg210_set_cxdone(fotg210); |
| 693 | break; |
| 694 | default: |
| 695 | fotg210_request_error(fotg210); |
| 696 | break; |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | static int fotg210_is_epnstall(struct fotg210_ep *ep) |
| 701 | { |
| 702 | struct fotg210_udc *fotg210 = ep->fotg210; |
| 703 | u32 value; |
| 704 | void __iomem *reg; |
| 705 | |
| 706 | reg = (ep->dir_in) ? |
| 707 | fotg210->reg + FOTG210_INEPMPSR(ep->epnum) : |
| 708 | fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum); |
| 709 | value = ioread32(reg); |
| 710 | return value & INOUTEPMPSR_STL_EP ? 1 : 0; |
| 711 | } |
| 712 | |
| 713 | static void fotg210_get_status(struct fotg210_udc *fotg210, |
| 714 | struct usb_ctrlrequest *ctrl) |
| 715 | { |
| 716 | u8 epnum; |
| 717 | |
| 718 | switch (ctrl->bRequestType & USB_RECIP_MASK) { |
| 719 | case USB_RECIP_DEVICE: |
| 720 | fotg210->ep0_data = cpu_to_le16(1 << USB_DEVICE_SELF_POWERED); |
| 721 | break; |
| 722 | case USB_RECIP_INTERFACE: |
| 723 | fotg210->ep0_data = cpu_to_le16(0); |
| 724 | break; |
| 725 | case USB_RECIP_ENDPOINT: |
| 726 | epnum = ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK; |
| 727 | if (epnum) |
| 728 | fotg210->ep0_data = |
| 729 | cpu_to_le16(fotg210_is_epnstall(fotg210->ep[epnum]) |
| 730 | << USB_ENDPOINT_HALT); |
| 731 | else |
| 732 | fotg210_request_error(fotg210); |
| 733 | break; |
| 734 | |
| 735 | default: |
| 736 | fotg210_request_error(fotg210); |
| 737 | return; /* exit */ |
| 738 | } |
| 739 | |
| 740 | fotg210->ep0_req->buf = &fotg210->ep0_data; |
| 741 | fotg210->ep0_req->length = 2; |
| 742 | |
| 743 | spin_unlock(&fotg210->lock); |
| 744 | fotg210_ep_queue(fotg210->gadget.ep0, fotg210->ep0_req, GFP_ATOMIC); |
| 745 | spin_lock(&fotg210->lock); |
| 746 | } |
| 747 | |
| 748 | static int fotg210_setup_packet(struct fotg210_udc *fotg210, |
| 749 | struct usb_ctrlrequest *ctrl) |
| 750 | { |
| 751 | u8 *p = (u8 *)ctrl; |
| 752 | u8 ret = 0; |
| 753 | |
| 754 | fotg210_rdsetupp(fotg210, p); |
| 755 | |
| 756 | fotg210->ep[0]->dir_in = ctrl->bRequestType & USB_DIR_IN; |
| 757 | |
| 758 | if (fotg210->gadget.speed == USB_SPEED_UNKNOWN) { |
| 759 | u32 value = ioread32(fotg210->reg + FOTG210_DMCR); |
| 760 | fotg210->gadget.speed = value & DMCR_HS_EN ? |
| 761 | USB_SPEED_HIGH : USB_SPEED_FULL; |
| 762 | } |
| 763 | |
| 764 | /* check request */ |
| 765 | if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { |
| 766 | switch (ctrl->bRequest) { |
| 767 | case USB_REQ_GET_STATUS: |
| 768 | fotg210_get_status(fotg210, ctrl); |
| 769 | break; |
| 770 | case USB_REQ_CLEAR_FEATURE: |
| 771 | fotg210_clear_feature(fotg210, ctrl); |
| 772 | break; |
| 773 | case USB_REQ_SET_FEATURE: |
| 774 | fotg210_set_feature(fotg210, ctrl); |
| 775 | break; |
| 776 | case USB_REQ_SET_ADDRESS: |
| 777 | fotg210_set_address(fotg210, ctrl); |
| 778 | break; |
| 779 | case USB_REQ_SET_CONFIGURATION: |
| 780 | fotg210_set_configuration(fotg210); |
| 781 | ret = 1; |
| 782 | break; |
| 783 | default: |
| 784 | ret = 1; |
| 785 | break; |
| 786 | } |
| 787 | } else { |
| 788 | ret = 1; |
| 789 | } |
| 790 | |
| 791 | return ret; |
| 792 | } |
| 793 | |
| 794 | static void fotg210_ep0out(struct fotg210_udc *fotg210) |
| 795 | { |
| 796 | struct fotg210_ep *ep = fotg210->ep[0]; |
| 797 | |
| 798 | if (!list_empty(&ep->queue) && !ep->dir_in) { |
| 799 | struct fotg210_request *req; |
| 800 | |
| 801 | req = list_first_entry(&ep->queue, |
| 802 | struct fotg210_request, queue); |
| 803 | |
| 804 | if (req->req.length) |
| 805 | fotg210_start_dma(ep, req); |
| 806 | |
| 807 | if ((req->req.length - req->req.actual) < ep->ep.maxpacket) |
| 808 | fotg210_done(ep, req, 0); |
| 809 | } else { |
| 810 | pr_err("%s : empty queue\n", __func__); |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | static void fotg210_ep0in(struct fotg210_udc *fotg210) |
| 815 | { |
| 816 | struct fotg210_ep *ep = fotg210->ep[0]; |
| 817 | |
| 818 | if ((!list_empty(&ep->queue)) && (ep->dir_in)) { |
| 819 | struct fotg210_request *req; |
| 820 | |
| 821 | req = list_entry(ep->queue.next, |
| 822 | struct fotg210_request, queue); |
| 823 | |
| 824 | if (req->req.length) |
| 825 | fotg210_start_dma(ep, req); |
| 826 | |
| 827 | if (req->req.actual == req->req.length) |
| 828 | fotg210_done(ep, req, 0); |
| 829 | } else { |
| 830 | fotg210_set_cxdone(fotg210); |
| 831 | } |
| 832 | } |
| 833 | |
| 834 | static void fotg210_clear_comabt_int(struct fotg210_udc *fotg210) |
| 835 | { |
| 836 | u32 value = ioread32(fotg210->reg + FOTG210_DISGR0); |
| 837 | |
| 838 | value &= ~DISGR0_CX_COMABT_INT; |
| 839 | iowrite32(value, fotg210->reg + FOTG210_DISGR0); |
| 840 | } |
| 841 | |
| 842 | static void fotg210_in_fifo_handler(struct fotg210_ep *ep) |
| 843 | { |
| 844 | struct fotg210_request *req = list_entry(ep->queue.next, |
| 845 | struct fotg210_request, queue); |
| 846 | |
| 847 | if (req->req.length) |
| 848 | fotg210_start_dma(ep, req); |
| 849 | fotg210_done(ep, req, 0); |
| 850 | } |
| 851 | |
| 852 | static void fotg210_out_fifo_handler(struct fotg210_ep *ep) |
| 853 | { |
| 854 | struct fotg210_request *req = list_entry(ep->queue.next, |
| 855 | struct fotg210_request, queue); |
| 856 | int disgr1 = ioread32(ep->fotg210->reg + FOTG210_DISGR1); |
| 857 | |
| 858 | fotg210_start_dma(ep, req); |
| 859 | |
| 860 | /* Complete the request when it's full or a short packet arrived. |
| 861 | * Like other drivers, short_not_ok isn't handled. |
| 862 | */ |
| 863 | |
| 864 | if (req->req.length == req->req.actual || |
| 865 | (disgr1 & DISGR1_SPK_INT(ep->epnum - 1))) |
| 866 | fotg210_done(ep, req, 0); |
| 867 | } |
| 868 | |
| 869 | static irqreturn_t fotg210_irq(int irq, void *_fotg210) |
| 870 | { |
| 871 | struct fotg210_udc *fotg210 = _fotg210; |
| 872 | u32 int_grp = ioread32(fotg210->reg + FOTG210_DIGR); |
| 873 | u32 int_msk = ioread32(fotg210->reg + FOTG210_DMIGR); |
| 874 | |
| 875 | int_grp &= ~int_msk; |
| 876 | |
| 877 | spin_lock(&fotg210->lock); |
| 878 | |
| 879 | if (int_grp & DIGR_INT_G2) { |
| 880 | void __iomem *reg = fotg210->reg + FOTG210_DISGR2; |
| 881 | u32 int_grp2 = ioread32(reg); |
| 882 | u32 int_msk2 = ioread32(fotg210->reg + FOTG210_DMISGR2); |
| 883 | u32 value; |
| 884 | |
| 885 | int_grp2 &= ~int_msk2; |
| 886 | |
| 887 | if (int_grp2 & DISGR2_USBRST_INT) { |
| 888 | usb_gadget_udc_reset(&fotg210->gadget, |
| 889 | fotg210->driver); |
| 890 | value = ioread32(reg); |
| 891 | value &= ~DISGR2_USBRST_INT; |
| 892 | iowrite32(value, reg); |
| 893 | pr_info("fotg210 udc reset\n"); |
| 894 | } |
| 895 | if (int_grp2 & DISGR2_SUSP_INT) { |
| 896 | value = ioread32(reg); |
| 897 | value &= ~DISGR2_SUSP_INT; |
| 898 | iowrite32(value, reg); |
| 899 | pr_info("fotg210 udc suspend\n"); |
| 900 | } |
| 901 | if (int_grp2 & DISGR2_RESM_INT) { |
| 902 | value = ioread32(reg); |
| 903 | value &= ~DISGR2_RESM_INT; |
| 904 | iowrite32(value, reg); |
| 905 | pr_info("fotg210 udc resume\n"); |
| 906 | } |
| 907 | if (int_grp2 & DISGR2_ISO_SEQ_ERR_INT) { |
| 908 | value = ioread32(reg); |
| 909 | value &= ~DISGR2_ISO_SEQ_ERR_INT; |
| 910 | iowrite32(value, reg); |
| 911 | pr_info("fotg210 iso sequence error\n"); |
| 912 | } |
| 913 | if (int_grp2 & DISGR2_ISO_SEQ_ABORT_INT) { |
| 914 | value = ioread32(reg); |
| 915 | value &= ~DISGR2_ISO_SEQ_ABORT_INT; |
| 916 | iowrite32(value, reg); |
| 917 | pr_info("fotg210 iso sequence abort\n"); |
| 918 | } |
| 919 | if (int_grp2 & DISGR2_TX0BYTE_INT) { |
| 920 | fotg210_clear_tx0byte(fotg210); |
| 921 | value = ioread32(reg); |
| 922 | value &= ~DISGR2_TX0BYTE_INT; |
| 923 | iowrite32(value, reg); |
| 924 | pr_info("fotg210 transferred 0 byte\n"); |
| 925 | } |
| 926 | if (int_grp2 & DISGR2_RX0BYTE_INT) { |
| 927 | fotg210_clear_rx0byte(fotg210); |
| 928 | value = ioread32(reg); |
| 929 | value &= ~DISGR2_RX0BYTE_INT; |
| 930 | iowrite32(value, reg); |
| 931 | pr_info("fotg210 received 0 byte\n"); |
| 932 | } |
| 933 | if (int_grp2 & DISGR2_DMA_ERROR) { |
| 934 | value = ioread32(reg); |
| 935 | value &= ~DISGR2_DMA_ERROR; |
| 936 | iowrite32(value, reg); |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | if (int_grp & DIGR_INT_G0) { |
| 941 | void __iomem *reg = fotg210->reg + FOTG210_DISGR0; |
| 942 | u32 int_grp0 = ioread32(reg); |
| 943 | u32 int_msk0 = ioread32(fotg210->reg + FOTG210_DMISGR0); |
| 944 | struct usb_ctrlrequest ctrl; |
| 945 | |
| 946 | int_grp0 &= ~int_msk0; |
| 947 | |
| 948 | /* the highest priority in this source register */ |
| 949 | if (int_grp0 & DISGR0_CX_COMABT_INT) { |
| 950 | fotg210_clear_comabt_int(fotg210); |
| 951 | pr_info("fotg210 CX command abort\n"); |
| 952 | } |
| 953 | |
| 954 | if (int_grp0 & DISGR0_CX_SETUP_INT) { |
| 955 | if (fotg210_setup_packet(fotg210, &ctrl)) { |
| 956 | spin_unlock(&fotg210->lock); |
| 957 | if (fotg210->driver->setup(&fotg210->gadget, |
| 958 | &ctrl) < 0) |
| 959 | fotg210_set_cxstall(fotg210); |
| 960 | spin_lock(&fotg210->lock); |
| 961 | } |
| 962 | } |
| 963 | if (int_grp0 & DISGR0_CX_COMEND_INT) |
| 964 | pr_info("fotg210 cmd end\n"); |
| 965 | |
| 966 | if (int_grp0 & DISGR0_CX_IN_INT) |
| 967 | fotg210_ep0in(fotg210); |
| 968 | |
| 969 | if (int_grp0 & DISGR0_CX_OUT_INT) |
| 970 | fotg210_ep0out(fotg210); |
| 971 | |
| 972 | if (int_grp0 & DISGR0_CX_COMFAIL_INT) { |
| 973 | fotg210_set_cxstall(fotg210); |
| 974 | pr_info("fotg210 ep0 fail\n"); |
| 975 | } |
| 976 | } |
| 977 | |
| 978 | if (int_grp & DIGR_INT_G1) { |
| 979 | void __iomem *reg = fotg210->reg + FOTG210_DISGR1; |
| 980 | u32 int_grp1 = ioread32(reg); |
| 981 | u32 int_msk1 = ioread32(fotg210->reg + FOTG210_DMISGR1); |
| 982 | int fifo; |
| 983 | |
| 984 | int_grp1 &= ~int_msk1; |
| 985 | |
| 986 | for (fifo = 0; fifo < FOTG210_MAX_FIFO_NUM; fifo++) { |
| 987 | if (int_grp1 & DISGR1_IN_INT(fifo)) |
| 988 | fotg210_in_fifo_handler(fotg210->ep[fifo + 1]); |
| 989 | |
| 990 | if ((int_grp1 & DISGR1_OUT_INT(fifo)) || |
| 991 | (int_grp1 & DISGR1_SPK_INT(fifo))) |
| 992 | fotg210_out_fifo_handler(fotg210->ep[fifo + 1]); |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | spin_unlock(&fotg210->lock); |
| 997 | |
| 998 | return IRQ_HANDLED; |
| 999 | } |
| 1000 | |
| 1001 | static void fotg210_disable_unplug(struct fotg210_udc *fotg210) |
| 1002 | { |
| 1003 | u32 reg = ioread32(fotg210->reg + FOTG210_PHYTMSR); |
| 1004 | |
| 1005 | reg &= ~PHYTMSR_UNPLUG; |
| 1006 | iowrite32(reg, fotg210->reg + FOTG210_PHYTMSR); |
| 1007 | } |
| 1008 | |
| 1009 | static int fotg210_udc_start(struct usb_gadget *g, |
| 1010 | struct usb_gadget_driver *driver) |
| 1011 | { |
| 1012 | struct fotg210_udc *fotg210 = gadget_to_fotg210(g); |
| 1013 | u32 value; |
| 1014 | int ret; |
| 1015 | |
| 1016 | /* hook up the driver */ |
| 1017 | driver->driver.bus = NULL; |
| 1018 | fotg210->driver = driver; |
| 1019 | |
| 1020 | if (!IS_ERR_OR_NULL(fotg210->phy)) { |
| 1021 | ret = otg_set_peripheral(fotg210->phy->otg, |
| 1022 | &fotg210->gadget); |
| 1023 | if (ret) |
| 1024 | dev_err(fotg210->dev, "can't bind to phy\n"); |
| 1025 | } |
| 1026 | |
| 1027 | /* enable device global interrupt */ |
| 1028 | value = ioread32(fotg210->reg + FOTG210_DMCR); |
| 1029 | value |= DMCR_GLINT_EN; |
| 1030 | iowrite32(value, fotg210->reg + FOTG210_DMCR); |
| 1031 | |
| 1032 | return 0; |
| 1033 | } |
| 1034 | |
| 1035 | static void fotg210_init(struct fotg210_udc *fotg210) |
| 1036 | { |
| 1037 | u32 value; |
| 1038 | |
| 1039 | /* disable global interrupt and set int polarity to active high */ |
| 1040 | iowrite32(GMIR_MHC_INT | GMIR_MOTG_INT | GMIR_INT_POLARITY, |
| 1041 | fotg210->reg + FOTG210_GMIR); |
| 1042 | |
| 1043 | /* disable device global interrupt */ |
| 1044 | value = ioread32(fotg210->reg + FOTG210_DMCR); |
| 1045 | value &= ~DMCR_GLINT_EN; |
| 1046 | iowrite32(value, fotg210->reg + FOTG210_DMCR); |
| 1047 | |
| 1048 | /* enable only grp2 irqs we handle */ |
| 1049 | iowrite32(~(DISGR2_DMA_ERROR | DISGR2_RX0BYTE_INT | DISGR2_TX0BYTE_INT |
| 1050 | | DISGR2_ISO_SEQ_ABORT_INT | DISGR2_ISO_SEQ_ERR_INT |
| 1051 | | DISGR2_RESM_INT | DISGR2_SUSP_INT | DISGR2_USBRST_INT), |
| 1052 | fotg210->reg + FOTG210_DMISGR2); |
| 1053 | |
| 1054 | /* disable all fifo interrupt */ |
| 1055 | iowrite32(~(u32)0, fotg210->reg + FOTG210_DMISGR1); |
| 1056 | |
| 1057 | /* disable cmd end */ |
| 1058 | value = ioread32(fotg210->reg + FOTG210_DMISGR0); |
| 1059 | value |= DMISGR0_MCX_COMEND; |
| 1060 | iowrite32(value, fotg210->reg + FOTG210_DMISGR0); |
| 1061 | } |
| 1062 | |
| 1063 | static int fotg210_udc_stop(struct usb_gadget *g) |
| 1064 | { |
| 1065 | struct fotg210_udc *fotg210 = gadget_to_fotg210(g); |
| 1066 | unsigned long flags; |
| 1067 | |
| 1068 | if (!IS_ERR_OR_NULL(fotg210->phy)) |
| 1069 | return otg_set_peripheral(fotg210->phy->otg, NULL); |
| 1070 | |
| 1071 | spin_lock_irqsave(&fotg210->lock, flags); |
| 1072 | |
| 1073 | fotg210_init(fotg210); |
| 1074 | fotg210->driver = NULL; |
| 1075 | |
| 1076 | spin_unlock_irqrestore(&fotg210->lock, flags); |
| 1077 | |
| 1078 | return 0; |
| 1079 | } |
| 1080 | |
| 1081 | static const struct usb_gadget_ops fotg210_gadget_ops = { |
| 1082 | .udc_start = fotg210_udc_start, |
| 1083 | .udc_stop = fotg210_udc_stop, |
| 1084 | }; |
| 1085 | |
| 1086 | /** |
| 1087 | * fotg210_phy_event - Called by phy upon VBus event |
| 1088 | * @nb: notifier block |
| 1089 | * @action: phy action, is vbus connect or disconnect |
| 1090 | * @data: the usb_gadget structure in fotg210 |
| 1091 | * |
| 1092 | * Called by the USB Phy when a cable connect or disconnect is sensed. |
| 1093 | * |
| 1094 | * Returns NOTIFY_OK or NOTIFY_DONE |
| 1095 | */ |
| 1096 | static int fotg210_phy_event(struct notifier_block *nb, unsigned long action, |
| 1097 | void *data) |
| 1098 | { |
| 1099 | struct usb_gadget *gadget = data; |
| 1100 | |
| 1101 | if (!gadget) |
| 1102 | return NOTIFY_DONE; |
| 1103 | |
| 1104 | switch (action) { |
| 1105 | case USB_EVENT_VBUS: |
| 1106 | usb_gadget_vbus_connect(gadget); |
| 1107 | return NOTIFY_OK; |
| 1108 | case USB_EVENT_NONE: |
| 1109 | usb_gadget_vbus_disconnect(gadget); |
| 1110 | return NOTIFY_OK; |
| 1111 | default: |
| 1112 | return NOTIFY_DONE; |
| 1113 | } |
| 1114 | } |
| 1115 | |
| 1116 | static struct notifier_block fotg210_phy_notifier = { |
| 1117 | .notifier_call = fotg210_phy_event, |
| 1118 | }; |
| 1119 | |
| 1120 | int fotg210_udc_remove(struct platform_device *pdev) |
| 1121 | { |
| 1122 | struct fotg210_udc *fotg210 = platform_get_drvdata(pdev); |
| 1123 | int i; |
| 1124 | |
| 1125 | usb_del_gadget_udc(&fotg210->gadget); |
| 1126 | if (!IS_ERR_OR_NULL(fotg210->phy)) { |
| 1127 | usb_unregister_notifier(fotg210->phy, &fotg210_phy_notifier); |
| 1128 | usb_put_phy(fotg210->phy); |
| 1129 | } |
| 1130 | iounmap(fotg210->reg); |
| 1131 | free_irq(platform_get_irq(pdev, 0), fotg210); |
| 1132 | |
| 1133 | fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req); |
| 1134 | for (i = 0; i < FOTG210_MAX_NUM_EP; i++) |
| 1135 | kfree(fotg210->ep[i]); |
| 1136 | |
| 1137 | if (!IS_ERR(fotg210->pclk)) |
| 1138 | clk_disable_unprepare(fotg210->pclk); |
| 1139 | |
| 1140 | kfree(fotg210); |
| 1141 | |
| 1142 | return 0; |
| 1143 | } |
| 1144 | |
| 1145 | int fotg210_udc_probe(struct platform_device *pdev) |
| 1146 | { |
| 1147 | struct resource *res; |
| 1148 | struct fotg210_udc *fotg210 = NULL; |
| 1149 | struct device *dev = &pdev->dev; |
| 1150 | int irq; |
| 1151 | int ret = 0; |
| 1152 | int i; |
| 1153 | |
| 1154 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1155 | if (!res) { |
| 1156 | pr_err("platform_get_resource error.\n"); |
| 1157 | return -ENODEV; |
| 1158 | } |
| 1159 | |
| 1160 | irq = platform_get_irq(pdev, 0); |
| 1161 | if (irq < 0) { |
| 1162 | pr_err("could not get irq\n"); |
| 1163 | return -ENODEV; |
| 1164 | } |
| 1165 | |
| 1166 | ret = -ENOMEM; |
| 1167 | |
| 1168 | /* initialize udc */ |
| 1169 | fotg210 = kzalloc(sizeof(struct fotg210_udc), GFP_KERNEL); |
| 1170 | if (fotg210 == NULL) |
| 1171 | goto err; |
| 1172 | |
| 1173 | fotg210->dev = dev; |
| 1174 | |
| 1175 | /* It's OK not to supply this clock */ |
| 1176 | fotg210->pclk = devm_clk_get(dev, "PCLK"); |
| 1177 | if (!IS_ERR(fotg210->pclk)) { |
| 1178 | ret = clk_prepare_enable(fotg210->pclk); |
| 1179 | if (ret) { |
| 1180 | dev_err(dev, "failed to enable PCLK\n"); |
| 1181 | return ret; |
| 1182 | } |
| 1183 | } else if (PTR_ERR(fotg210->pclk) == -EPROBE_DEFER) { |
| 1184 | /* |
| 1185 | * Percolate deferrals, for anything else, |
| 1186 | * just live without the clocking. |
| 1187 | */ |
| 1188 | ret = -EPROBE_DEFER; |
| 1189 | goto err; |
| 1190 | } |
| 1191 | |
| 1192 | fotg210->phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0); |
| 1193 | if (IS_ERR(fotg210->phy)) { |
| 1194 | ret = PTR_ERR(fotg210->phy); |
| 1195 | if (ret == -EPROBE_DEFER) |
| 1196 | goto err_pclk; |
| 1197 | dev_info(dev, "no PHY found\n"); |
| 1198 | fotg210->phy = NULL; |
| 1199 | } else { |
| 1200 | ret = usb_phy_init(fotg210->phy); |
| 1201 | if (ret) |
| 1202 | goto err_pclk; |
| 1203 | dev_info(dev, "found and initialized PHY\n"); |
| 1204 | } |
| 1205 | |
| 1206 | for (i = 0; i < FOTG210_MAX_NUM_EP; i++) { |
| 1207 | fotg210->ep[i] = kzalloc(sizeof(struct fotg210_ep), GFP_KERNEL); |
| 1208 | if (!fotg210->ep[i]) |
| 1209 | goto err_alloc; |
| 1210 | } |
| 1211 | |
| 1212 | fotg210->reg = ioremap(res->start, resource_size(res)); |
| 1213 | if (fotg210->reg == NULL) { |
| 1214 | dev_err(dev, "ioremap error\n"); |
| 1215 | goto err_alloc; |
| 1216 | } |
| 1217 | |
| 1218 | spin_lock_init(&fotg210->lock); |
| 1219 | |
| 1220 | platform_set_drvdata(pdev, fotg210); |
| 1221 | |
| 1222 | fotg210->gadget.ops = &fotg210_gadget_ops; |
| 1223 | |
| 1224 | fotg210->gadget.max_speed = USB_SPEED_HIGH; |
| 1225 | fotg210->gadget.dev.parent = dev; |
| 1226 | fotg210->gadget.dev.dma_mask = dev->dma_mask; |
| 1227 | fotg210->gadget.name = udc_name; |
| 1228 | |
| 1229 | INIT_LIST_HEAD(&fotg210->gadget.ep_list); |
| 1230 | |
| 1231 | for (i = 0; i < FOTG210_MAX_NUM_EP; i++) { |
| 1232 | struct fotg210_ep *ep = fotg210->ep[i]; |
| 1233 | |
| 1234 | if (i) { |
| 1235 | INIT_LIST_HEAD(&fotg210->ep[i]->ep.ep_list); |
| 1236 | list_add_tail(&fotg210->ep[i]->ep.ep_list, |
| 1237 | &fotg210->gadget.ep_list); |
| 1238 | } |
| 1239 | ep->fotg210 = fotg210; |
| 1240 | INIT_LIST_HEAD(&ep->queue); |
| 1241 | ep->ep.name = fotg210_ep_name[i]; |
| 1242 | ep->ep.ops = &fotg210_ep_ops; |
| 1243 | usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0); |
| 1244 | |
| 1245 | if (i == 0) { |
| 1246 | ep->ep.caps.type_control = true; |
| 1247 | } else { |
| 1248 | ep->ep.caps.type_iso = true; |
| 1249 | ep->ep.caps.type_bulk = true; |
| 1250 | ep->ep.caps.type_int = true; |
| 1251 | } |
| 1252 | |
| 1253 | ep->ep.caps.dir_in = true; |
| 1254 | ep->ep.caps.dir_out = true; |
| 1255 | } |
| 1256 | usb_ep_set_maxpacket_limit(&fotg210->ep[0]->ep, 0x40); |
| 1257 | fotg210->gadget.ep0 = &fotg210->ep[0]->ep; |
| 1258 | INIT_LIST_HEAD(&fotg210->gadget.ep0->ep_list); |
| 1259 | |
| 1260 | fotg210->ep0_req = fotg210_ep_alloc_request(&fotg210->ep[0]->ep, |
| 1261 | GFP_KERNEL); |
| 1262 | if (fotg210->ep0_req == NULL) |
| 1263 | goto err_map; |
| 1264 | |
| 1265 | fotg210_init(fotg210); |
| 1266 | |
| 1267 | fotg210_disable_unplug(fotg210); |
| 1268 | |
| 1269 | ret = request_irq(irq, fotg210_irq, IRQF_SHARED, |
| 1270 | udc_name, fotg210); |
| 1271 | if (ret < 0) { |
| 1272 | dev_err(dev, "request_irq error (%d)\n", ret); |
| 1273 | goto err_req; |
| 1274 | } |
| 1275 | |
| 1276 | if (!IS_ERR_OR_NULL(fotg210->phy)) |
| 1277 | usb_register_notifier(fotg210->phy, &fotg210_phy_notifier); |
| 1278 | |
| 1279 | ret = usb_add_gadget_udc(dev, &fotg210->gadget); |
| 1280 | if (ret) |
| 1281 | goto err_add_udc; |
| 1282 | |
| 1283 | dev_info(dev, "version %s\n", DRIVER_VERSION); |
| 1284 | |
| 1285 | return 0; |
| 1286 | |
| 1287 | err_add_udc: |
| 1288 | if (!IS_ERR_OR_NULL(fotg210->phy)) |
| 1289 | usb_unregister_notifier(fotg210->phy, &fotg210_phy_notifier); |
| 1290 | free_irq(irq, fotg210); |
| 1291 | |
| 1292 | err_req: |
| 1293 | fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req); |
| 1294 | |
| 1295 | err_map: |
| 1296 | iounmap(fotg210->reg); |
| 1297 | |
| 1298 | err_alloc: |
| 1299 | for (i = 0; i < FOTG210_MAX_NUM_EP; i++) |
| 1300 | kfree(fotg210->ep[i]); |
| 1301 | err_pclk: |
| 1302 | if (!IS_ERR(fotg210->pclk)) |
| 1303 | clk_disable_unprepare(fotg210->pclk); |
| 1304 | |
| 1305 | kfree(fotg210); |
| 1306 | |
| 1307 | err: |
| 1308 | return ret; |
| 1309 | } |