1 /* 2 * M66592 UDC (USB gadget) 3 * 4 * Copyright (C) 2006-2007 Renesas Solutions Corp. 5 * 6 * Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; version 2 of the License. 11 */ 12 13 #include <linux/module.h> 14 #include <linux/interrupt.h> 15 #include <linux/delay.h> 16 #include <linux/io.h> 17 #include <linux/platform_device.h> 18 #include <linux/slab.h> 19 #include <linux/err.h> 20 #include <linux/usb/ch9.h> 21 #include <linux/usb/gadget.h> 22 23 #include "m66592-udc.h" 24 25 MODULE_DESCRIPTION("M66592 USB gadget driver"); 26 MODULE_LICENSE("GPL"); 27 MODULE_AUTHOR("Yoshihiro Shimoda"); 28 MODULE_ALIAS("platform:m66592_udc"); 29 30 #define DRIVER_VERSION "21 July 2009" 31 32 static const char udc_name[] = "m66592_udc"; 33 static const char *m66592_ep_name[] = { 34 "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7" 35 }; 36 37 static void disable_controller(struct m66592 *m66592); 38 static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req); 39 static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req); 40 static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req, 41 gfp_t gfp_flags); 42 43 static void transfer_complete(struct m66592_ep *ep, 44 struct m66592_request *req, int status); 45 46 /*-------------------------------------------------------------------------*/ 47 static inline u16 get_usb_speed(struct m66592 *m66592) 48 { 49 return (m66592_read(m66592, M66592_DVSTCTR) & M66592_RHST); 50 } 51 52 static void enable_pipe_irq(struct m66592 *m66592, u16 pipenum, 53 unsigned long reg) 54 { 55 u16 tmp; 56 57 tmp = m66592_read(m66592, M66592_INTENB0); 58 m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE, 59 M66592_INTENB0); 60 m66592_bset(m66592, (1 << pipenum), reg); 61 m66592_write(m66592, tmp, M66592_INTENB0); 62 } 63 64 static void disable_pipe_irq(struct m66592 *m66592, u16 pipenum, 65 unsigned long reg) 66 { 67 u16 tmp; 68 69 tmp = m66592_read(m66592, M66592_INTENB0); 70 m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE, 71 M66592_INTENB0); 72 m66592_bclr(m66592, (1 << pipenum), reg); 73 m66592_write(m66592, tmp, M66592_INTENB0); 74 } 75 76 static void m66592_usb_connect(struct m66592 *m66592) 77 { 78 m66592_bset(m66592, M66592_CTRE, M66592_INTENB0); 79 m66592_bset(m66592, M66592_WDST | M66592_RDST | M66592_CMPL, 80 M66592_INTENB0); 81 m66592_bset(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0); 82 83 m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG); 84 } 85 86 static void m66592_usb_disconnect(struct m66592 *m66592) 87 __releases(m66592->lock) 88 __acquires(m66592->lock) 89 { 90 m66592_bclr(m66592, M66592_CTRE, M66592_INTENB0); 91 m66592_bclr(m66592, M66592_WDST | M66592_RDST | M66592_CMPL, 92 M66592_INTENB0); 93 m66592_bclr(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0); 94 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG); 95 96 m66592->gadget.speed = USB_SPEED_UNKNOWN; 97 spin_unlock(&m66592->lock); 98 m66592->driver->disconnect(&m66592->gadget); 99 spin_lock(&m66592->lock); 100 101 disable_controller(m66592); 102 INIT_LIST_HEAD(&m66592->ep[0].queue); 103 } 104 105 static inline u16 control_reg_get_pid(struct m66592 *m66592, u16 pipenum) 106 { 107 u16 pid = 0; 108 unsigned long offset; 109 110 if (pipenum == 0) 111 pid = m66592_read(m66592, M66592_DCPCTR) & M66592_PID; 112 else if (pipenum < M66592_MAX_NUM_PIPE) { 113 offset = get_pipectr_addr(pipenum); 114 pid = m66592_read(m66592, offset) & M66592_PID; 115 } else 116 pr_err("unexpect pipe num (%d)\n", pipenum); 117 118 return pid; 119 } 120 121 static inline void control_reg_set_pid(struct m66592 *m66592, u16 pipenum, 122 u16 pid) 123 { 124 unsigned long offset; 125 126 if (pipenum == 0) 127 m66592_mdfy(m66592, pid, M66592_PID, M66592_DCPCTR); 128 else if (pipenum < M66592_MAX_NUM_PIPE) { 129 offset = get_pipectr_addr(pipenum); 130 m66592_mdfy(m66592, pid, M66592_PID, offset); 131 } else 132 pr_err("unexpect pipe num (%d)\n", pipenum); 133 } 134 135 static inline void pipe_start(struct m66592 *m66592, u16 pipenum) 136 { 137 control_reg_set_pid(m66592, pipenum, M66592_PID_BUF); 138 } 139 140 static inline void pipe_stop(struct m66592 *m66592, u16 pipenum) 141 { 142 control_reg_set_pid(m66592, pipenum, M66592_PID_NAK); 143 } 144 145 static inline void pipe_stall(struct m66592 *m66592, u16 pipenum) 146 { 147 control_reg_set_pid(m66592, pipenum, M66592_PID_STALL); 148 } 149 150 static inline u16 control_reg_get(struct m66592 *m66592, u16 pipenum) 151 { 152 u16 ret = 0; 153 unsigned long offset; 154 155 if (pipenum == 0) 156 ret = m66592_read(m66592, M66592_DCPCTR); 157 else if (pipenum < M66592_MAX_NUM_PIPE) { 158 offset = get_pipectr_addr(pipenum); 159 ret = m66592_read(m66592, offset); 160 } else 161 pr_err("unexpect pipe num (%d)\n", pipenum); 162 163 return ret; 164 } 165 166 static inline void control_reg_sqclr(struct m66592 *m66592, u16 pipenum) 167 { 168 unsigned long offset; 169 170 pipe_stop(m66592, pipenum); 171 172 if (pipenum == 0) 173 m66592_bset(m66592, M66592_SQCLR, M66592_DCPCTR); 174 else if (pipenum < M66592_MAX_NUM_PIPE) { 175 offset = get_pipectr_addr(pipenum); 176 m66592_bset(m66592, M66592_SQCLR, offset); 177 } else 178 pr_err("unexpect pipe num(%d)\n", pipenum); 179 } 180 181 static inline int get_buffer_size(struct m66592 *m66592, u16 pipenum) 182 { 183 u16 tmp; 184 int size; 185 186 if (pipenum == 0) { 187 tmp = m66592_read(m66592, M66592_DCPCFG); 188 if ((tmp & M66592_CNTMD) != 0) 189 size = 256; 190 else { 191 tmp = m66592_read(m66592, M66592_DCPMAXP); 192 size = tmp & M66592_MAXP; 193 } 194 } else { 195 m66592_write(m66592, pipenum, M66592_PIPESEL); 196 tmp = m66592_read(m66592, M66592_PIPECFG); 197 if ((tmp & M66592_CNTMD) != 0) { 198 tmp = m66592_read(m66592, M66592_PIPEBUF); 199 size = ((tmp >> 10) + 1) * 64; 200 } else { 201 tmp = m66592_read(m66592, M66592_PIPEMAXP); 202 size = tmp & M66592_MXPS; 203 } 204 } 205 206 return size; 207 } 208 209 static inline void pipe_change(struct m66592 *m66592, u16 pipenum) 210 { 211 struct m66592_ep *ep = m66592->pipenum2ep[pipenum]; 212 unsigned short mbw; 213 214 if (ep->use_dma) 215 return; 216 217 m66592_mdfy(m66592, pipenum, M66592_CURPIPE, ep->fifosel); 218 219 ndelay(450); 220 221 if (m66592->pdata->on_chip) 222 mbw = M66592_MBW_32; 223 else 224 mbw = M66592_MBW_16; 225 226 m66592_bset(m66592, mbw, ep->fifosel); 227 } 228 229 static int pipe_buffer_setting(struct m66592 *m66592, 230 struct m66592_pipe_info *info) 231 { 232 u16 bufnum = 0, buf_bsize = 0; 233 u16 pipecfg = 0; 234 235 if (info->pipe == 0) 236 return -EINVAL; 237 238 m66592_write(m66592, info->pipe, M66592_PIPESEL); 239 240 if (info->dir_in) 241 pipecfg |= M66592_DIR; 242 pipecfg |= info->type; 243 pipecfg |= info->epnum; 244 switch (info->type) { 245 case M66592_INT: 246 bufnum = 4 + (info->pipe - M66592_BASE_PIPENUM_INT); 247 buf_bsize = 0; 248 break; 249 case M66592_BULK: 250 /* isochronous pipes may be used as bulk pipes */ 251 if (info->pipe >= M66592_BASE_PIPENUM_BULK) 252 bufnum = info->pipe - M66592_BASE_PIPENUM_BULK; 253 else 254 bufnum = info->pipe - M66592_BASE_PIPENUM_ISOC; 255 256 bufnum = M66592_BASE_BUFNUM + (bufnum * 16); 257 buf_bsize = 7; 258 pipecfg |= M66592_DBLB; 259 if (!info->dir_in) 260 pipecfg |= M66592_SHTNAK; 261 break; 262 case M66592_ISO: 263 bufnum = M66592_BASE_BUFNUM + 264 (info->pipe - M66592_BASE_PIPENUM_ISOC) * 16; 265 buf_bsize = 7; 266 break; 267 } 268 269 if (buf_bsize && ((bufnum + 16) >= M66592_MAX_BUFNUM)) { 270 pr_err("m66592 pipe memory is insufficient\n"); 271 return -ENOMEM; 272 } 273 274 m66592_write(m66592, pipecfg, M66592_PIPECFG); 275 m66592_write(m66592, (buf_bsize << 10) | (bufnum), M66592_PIPEBUF); 276 m66592_write(m66592, info->maxpacket, M66592_PIPEMAXP); 277 if (info->interval) 278 info->interval--; 279 m66592_write(m66592, info->interval, M66592_PIPEPERI); 280 281 return 0; 282 } 283 284 static void pipe_buffer_release(struct m66592 *m66592, 285 struct m66592_pipe_info *info) 286 { 287 if (info->pipe == 0) 288 return; 289 290 if (is_bulk_pipe(info->pipe)) { 291 m66592->bulk--; 292 } else if (is_interrupt_pipe(info->pipe)) 293 m66592->interrupt--; 294 else if (is_isoc_pipe(info->pipe)) { 295 m66592->isochronous--; 296 if (info->type == M66592_BULK) 297 m66592->bulk--; 298 } else 299 pr_err("ep_release: unexpect pipenum (%d)\n", 300 info->pipe); 301 } 302 303 static void pipe_initialize(struct m66592_ep *ep) 304 { 305 struct m66592 *m66592 = ep->m66592; 306 unsigned short mbw; 307 308 m66592_mdfy(m66592, 0, M66592_CURPIPE, ep->fifosel); 309 310 m66592_write(m66592, M66592_ACLRM, ep->pipectr); 311 m66592_write(m66592, 0, ep->pipectr); 312 m66592_write(m66592, M66592_SQCLR, ep->pipectr); 313 if (ep->use_dma) { 314 m66592_mdfy(m66592, ep->pipenum, M66592_CURPIPE, ep->fifosel); 315 316 ndelay(450); 317 318 if (m66592->pdata->on_chip) 319 mbw = M66592_MBW_32; 320 else 321 mbw = M66592_MBW_16; 322 323 m66592_bset(m66592, mbw, ep->fifosel); 324 } 325 } 326 327 static void m66592_ep_setting(struct m66592 *m66592, struct m66592_ep *ep, 328 const struct usb_endpoint_descriptor *desc, 329 u16 pipenum, int dma) 330 { 331 if ((pipenum != 0) && dma) { 332 if (m66592->num_dma == 0) { 333 m66592->num_dma++; 334 ep->use_dma = 1; 335 ep->fifoaddr = M66592_D0FIFO; 336 ep->fifosel = M66592_D0FIFOSEL; 337 ep->fifoctr = M66592_D0FIFOCTR; 338 ep->fifotrn = M66592_D0FIFOTRN; 339 } else if (!m66592->pdata->on_chip && m66592->num_dma == 1) { 340 m66592->num_dma++; 341 ep->use_dma = 1; 342 ep->fifoaddr = M66592_D1FIFO; 343 ep->fifosel = M66592_D1FIFOSEL; 344 ep->fifoctr = M66592_D1FIFOCTR; 345 ep->fifotrn = M66592_D1FIFOTRN; 346 } else { 347 ep->use_dma = 0; 348 ep->fifoaddr = M66592_CFIFO; 349 ep->fifosel = M66592_CFIFOSEL; 350 ep->fifoctr = M66592_CFIFOCTR; 351 ep->fifotrn = 0; 352 } 353 } else { 354 ep->use_dma = 0; 355 ep->fifoaddr = M66592_CFIFO; 356 ep->fifosel = M66592_CFIFOSEL; 357 ep->fifoctr = M66592_CFIFOCTR; 358 ep->fifotrn = 0; 359 } 360 361 ep->pipectr = get_pipectr_addr(pipenum); 362 ep->pipenum = pipenum; 363 ep->ep.maxpacket = usb_endpoint_maxp(desc); 364 m66592->pipenum2ep[pipenum] = ep; 365 m66592->epaddr2ep[desc->bEndpointAddress&USB_ENDPOINT_NUMBER_MASK] = ep; 366 INIT_LIST_HEAD(&ep->queue); 367 } 368 369 static void m66592_ep_release(struct m66592_ep *ep) 370 { 371 struct m66592 *m66592 = ep->m66592; 372 u16 pipenum = ep->pipenum; 373 374 if (pipenum == 0) 375 return; 376 377 if (ep->use_dma) 378 m66592->num_dma--; 379 ep->pipenum = 0; 380 ep->busy = 0; 381 ep->use_dma = 0; 382 } 383 384 static int alloc_pipe_config(struct m66592_ep *ep, 385 const struct usb_endpoint_descriptor *desc) 386 { 387 struct m66592 *m66592 = ep->m66592; 388 struct m66592_pipe_info info; 389 int dma = 0; 390 int *counter; 391 int ret; 392 393 ep->ep.desc = desc; 394 395 BUG_ON(ep->pipenum); 396 397 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 398 case USB_ENDPOINT_XFER_BULK: 399 if (m66592->bulk >= M66592_MAX_NUM_BULK) { 400 if (m66592->isochronous >= M66592_MAX_NUM_ISOC) { 401 pr_err("bulk pipe is insufficient\n"); 402 return -ENODEV; 403 } else { 404 info.pipe = M66592_BASE_PIPENUM_ISOC 405 + m66592->isochronous; 406 counter = &m66592->isochronous; 407 } 408 } else { 409 info.pipe = M66592_BASE_PIPENUM_BULK + m66592->bulk; 410 counter = &m66592->bulk; 411 } 412 info.type = M66592_BULK; 413 dma = 1; 414 break; 415 case USB_ENDPOINT_XFER_INT: 416 if (m66592->interrupt >= M66592_MAX_NUM_INT) { 417 pr_err("interrupt pipe is insufficient\n"); 418 return -ENODEV; 419 } 420 info.pipe = M66592_BASE_PIPENUM_INT + m66592->interrupt; 421 info.type = M66592_INT; 422 counter = &m66592->interrupt; 423 break; 424 case USB_ENDPOINT_XFER_ISOC: 425 if (m66592->isochronous >= M66592_MAX_NUM_ISOC) { 426 pr_err("isochronous pipe is insufficient\n"); 427 return -ENODEV; 428 } 429 info.pipe = M66592_BASE_PIPENUM_ISOC + m66592->isochronous; 430 info.type = M66592_ISO; 431 counter = &m66592->isochronous; 432 break; 433 default: 434 pr_err("unexpect xfer type\n"); 435 return -EINVAL; 436 } 437 ep->type = info.type; 438 439 info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; 440 info.maxpacket = usb_endpoint_maxp(desc); 441 info.interval = desc->bInterval; 442 if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) 443 info.dir_in = 1; 444 else 445 info.dir_in = 0; 446 447 ret = pipe_buffer_setting(m66592, &info); 448 if (ret < 0) { 449 pr_err("pipe_buffer_setting fail\n"); 450 return ret; 451 } 452 453 (*counter)++; 454 if ((counter == &m66592->isochronous) && info.type == M66592_BULK) 455 m66592->bulk++; 456 457 m66592_ep_setting(m66592, ep, desc, info.pipe, dma); 458 pipe_initialize(ep); 459 460 return 0; 461 } 462 463 static int free_pipe_config(struct m66592_ep *ep) 464 { 465 struct m66592 *m66592 = ep->m66592; 466 struct m66592_pipe_info info; 467 468 info.pipe = ep->pipenum; 469 info.type = ep->type; 470 pipe_buffer_release(m66592, &info); 471 m66592_ep_release(ep); 472 473 return 0; 474 } 475 476 /*-------------------------------------------------------------------------*/ 477 static void pipe_irq_enable(struct m66592 *m66592, u16 pipenum) 478 { 479 enable_irq_ready(m66592, pipenum); 480 enable_irq_nrdy(m66592, pipenum); 481 } 482 483 static void pipe_irq_disable(struct m66592 *m66592, u16 pipenum) 484 { 485 disable_irq_ready(m66592, pipenum); 486 disable_irq_nrdy(m66592, pipenum); 487 } 488 489 /* if complete is true, gadget driver complete function is not call */ 490 static void control_end(struct m66592 *m66592, unsigned ccpl) 491 { 492 m66592->ep[0].internal_ccpl = ccpl; 493 pipe_start(m66592, 0); 494 m66592_bset(m66592, M66592_CCPL, M66592_DCPCTR); 495 } 496 497 static void start_ep0_write(struct m66592_ep *ep, struct m66592_request *req) 498 { 499 struct m66592 *m66592 = ep->m66592; 500 501 pipe_change(m66592, ep->pipenum); 502 m66592_mdfy(m66592, M66592_ISEL | M66592_PIPE0, 503 (M66592_ISEL | M66592_CURPIPE), 504 M66592_CFIFOSEL); 505 m66592_write(m66592, M66592_BCLR, ep->fifoctr); 506 if (req->req.length == 0) { 507 m66592_bset(m66592, M66592_BVAL, ep->fifoctr); 508 pipe_start(m66592, 0); 509 transfer_complete(ep, req, 0); 510 } else { 511 m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS); 512 irq_ep0_write(ep, req); 513 } 514 } 515 516 static void start_packet_write(struct m66592_ep *ep, struct m66592_request *req) 517 { 518 struct m66592 *m66592 = ep->m66592; 519 u16 tmp; 520 521 pipe_change(m66592, ep->pipenum); 522 disable_irq_empty(m66592, ep->pipenum); 523 pipe_start(m66592, ep->pipenum); 524 525 tmp = m66592_read(m66592, ep->fifoctr); 526 if (unlikely((tmp & M66592_FRDY) == 0)) 527 pipe_irq_enable(m66592, ep->pipenum); 528 else 529 irq_packet_write(ep, req); 530 } 531 532 static void start_packet_read(struct m66592_ep *ep, struct m66592_request *req) 533 { 534 struct m66592 *m66592 = ep->m66592; 535 u16 pipenum = ep->pipenum; 536 537 if (ep->pipenum == 0) { 538 m66592_mdfy(m66592, M66592_PIPE0, 539 (M66592_ISEL | M66592_CURPIPE), 540 M66592_CFIFOSEL); 541 m66592_write(m66592, M66592_BCLR, ep->fifoctr); 542 pipe_start(m66592, pipenum); 543 pipe_irq_enable(m66592, pipenum); 544 } else { 545 if (ep->use_dma) { 546 m66592_bset(m66592, M66592_TRCLR, ep->fifosel); 547 pipe_change(m66592, pipenum); 548 m66592_bset(m66592, M66592_TRENB, ep->fifosel); 549 m66592_write(m66592, 550 (req->req.length + ep->ep.maxpacket - 1) 551 / ep->ep.maxpacket, 552 ep->fifotrn); 553 } 554 pipe_start(m66592, pipenum); /* trigger once */ 555 pipe_irq_enable(m66592, pipenum); 556 } 557 } 558 559 static void start_packet(struct m66592_ep *ep, struct m66592_request *req) 560 { 561 if (ep->ep.desc->bEndpointAddress & USB_DIR_IN) 562 start_packet_write(ep, req); 563 else 564 start_packet_read(ep, req); 565 } 566 567 static void start_ep0(struct m66592_ep *ep, struct m66592_request *req) 568 { 569 u16 ctsq; 570 571 ctsq = m66592_read(ep->m66592, M66592_INTSTS0) & M66592_CTSQ; 572 573 switch (ctsq) { 574 case M66592_CS_RDDS: 575 start_ep0_write(ep, req); 576 break; 577 case M66592_CS_WRDS: 578 start_packet_read(ep, req); 579 break; 580 581 case M66592_CS_WRND: 582 control_end(ep->m66592, 0); 583 break; 584 default: 585 pr_err("start_ep0: unexpect ctsq(%x)\n", ctsq); 586 break; 587 } 588 } 589 590 static void init_controller(struct m66592 *m66592) 591 { 592 unsigned int endian; 593 594 if (m66592->pdata->on_chip) { 595 if (m66592->pdata->endian) 596 endian = 0; /* big endian */ 597 else 598 endian = M66592_LITTLE; /* little endian */ 599 600 m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */ 601 m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG); 602 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG); 603 m66592_bset(m66592, M66592_USBE, M66592_SYSCFG); 604 605 /* This is a workaound for SH7722 2nd cut */ 606 m66592_bset(m66592, 0x8000, M66592_DVSTCTR); 607 m66592_bset(m66592, 0x1000, M66592_TESTMODE); 608 m66592_bclr(m66592, 0x8000, M66592_DVSTCTR); 609 610 m66592_bset(m66592, M66592_INTL, M66592_INTENB1); 611 612 m66592_write(m66592, 0, M66592_CFBCFG); 613 m66592_write(m66592, 0, M66592_D0FBCFG); 614 m66592_bset(m66592, endian, M66592_CFBCFG); 615 m66592_bset(m66592, endian, M66592_D0FBCFG); 616 } else { 617 unsigned int clock, vif, irq_sense; 618 619 if (m66592->pdata->endian) 620 endian = M66592_BIGEND; /* big endian */ 621 else 622 endian = 0; /* little endian */ 623 624 if (m66592->pdata->vif) 625 vif = M66592_LDRV; /* 3.3v */ 626 else 627 vif = 0; /* 1.5v */ 628 629 switch (m66592->pdata->xtal) { 630 case M66592_PLATDATA_XTAL_12MHZ: 631 clock = M66592_XTAL12; 632 break; 633 case M66592_PLATDATA_XTAL_24MHZ: 634 clock = M66592_XTAL24; 635 break; 636 case M66592_PLATDATA_XTAL_48MHZ: 637 clock = M66592_XTAL48; 638 break; 639 default: 640 pr_warning("m66592-udc: xtal configuration error\n"); 641 clock = 0; 642 } 643 644 switch (m66592->irq_trigger) { 645 case IRQF_TRIGGER_LOW: 646 irq_sense = M66592_INTL; 647 break; 648 case IRQF_TRIGGER_FALLING: 649 irq_sense = 0; 650 break; 651 default: 652 pr_warning("m66592-udc: irq trigger config error\n"); 653 irq_sense = 0; 654 } 655 656 m66592_bset(m66592, 657 (vif & M66592_LDRV) | (endian & M66592_BIGEND), 658 M66592_PINCFG); 659 m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */ 660 m66592_mdfy(m66592, clock & M66592_XTAL, M66592_XTAL, 661 M66592_SYSCFG); 662 m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG); 663 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG); 664 m66592_bset(m66592, M66592_USBE, M66592_SYSCFG); 665 666 m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG); 667 668 msleep(3); 669 670 m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG); 671 672 msleep(1); 673 674 m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG); 675 676 m66592_bset(m66592, irq_sense & M66592_INTL, M66592_INTENB1); 677 m66592_write(m66592, M66592_BURST | M66592_CPU_ADR_RD_WR, 678 M66592_DMA0CFG); 679 } 680 } 681 682 static void disable_controller(struct m66592 *m66592) 683 { 684 m66592_bclr(m66592, M66592_UTST, M66592_TESTMODE); 685 if (!m66592->pdata->on_chip) { 686 m66592_bclr(m66592, M66592_SCKE, M66592_SYSCFG); 687 udelay(1); 688 m66592_bclr(m66592, M66592_PLLC, M66592_SYSCFG); 689 udelay(1); 690 m66592_bclr(m66592, M66592_RCKE, M66592_SYSCFG); 691 udelay(1); 692 m66592_bclr(m66592, M66592_XCKE, M66592_SYSCFG); 693 } 694 } 695 696 static void m66592_start_xclock(struct m66592 *m66592) 697 { 698 u16 tmp; 699 700 if (!m66592->pdata->on_chip) { 701 tmp = m66592_read(m66592, M66592_SYSCFG); 702 if (!(tmp & M66592_XCKE)) 703 m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG); 704 } 705 } 706 707 /*-------------------------------------------------------------------------*/ 708 static void transfer_complete(struct m66592_ep *ep, 709 struct m66592_request *req, int status) 710 __releases(m66592->lock) 711 __acquires(m66592->lock) 712 { 713 int restart = 0; 714 715 if (unlikely(ep->pipenum == 0)) { 716 if (ep->internal_ccpl) { 717 ep->internal_ccpl = 0; 718 return; 719 } 720 } 721 722 list_del_init(&req->queue); 723 if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN) 724 req->req.status = -ESHUTDOWN; 725 else 726 req->req.status = status; 727 728 if (!list_empty(&ep->queue)) 729 restart = 1; 730 731 spin_unlock(&ep->m66592->lock); 732 usb_gadget_giveback_request(&ep->ep, &req->req); 733 spin_lock(&ep->m66592->lock); 734 735 if (restart) { 736 req = list_entry(ep->queue.next, struct m66592_request, queue); 737 if (ep->ep.desc) 738 start_packet(ep, req); 739 } 740 } 741 742 static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req) 743 { 744 int i; 745 u16 tmp; 746 unsigned bufsize; 747 size_t size; 748 void *buf; 749 u16 pipenum = ep->pipenum; 750 struct m66592 *m66592 = ep->m66592; 751 752 pipe_change(m66592, pipenum); 753 m66592_bset(m66592, M66592_ISEL, ep->fifosel); 754 755 i = 0; 756 do { 757 tmp = m66592_read(m66592, ep->fifoctr); 758 if (i++ > 100000) { 759 pr_err("pipe0 is busy. maybe cpu i/o bus " 760 "conflict. please power off this controller."); 761 return; 762 } 763 ndelay(1); 764 } while ((tmp & M66592_FRDY) == 0); 765 766 /* prepare parameters */ 767 bufsize = get_buffer_size(m66592, pipenum); 768 buf = req->req.buf + req->req.actual; 769 size = min(bufsize, req->req.length - req->req.actual); 770 771 /* write fifo */ 772 if (req->req.buf) { 773 if (size > 0) 774 m66592_write_fifo(m66592, ep, buf, size); 775 if ((size == 0) || ((size % ep->ep.maxpacket) != 0)) 776 m66592_bset(m66592, M66592_BVAL, ep->fifoctr); 777 } 778 779 /* update parameters */ 780 req->req.actual += size; 781 782 /* check transfer finish */ 783 if ((!req->req.zero && (req->req.actual == req->req.length)) 784 || (size % ep->ep.maxpacket) 785 || (size == 0)) { 786 disable_irq_ready(m66592, pipenum); 787 disable_irq_empty(m66592, pipenum); 788 } else { 789 disable_irq_ready(m66592, pipenum); 790 enable_irq_empty(m66592, pipenum); 791 } 792 pipe_start(m66592, pipenum); 793 } 794 795 static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req) 796 { 797 u16 tmp; 798 unsigned bufsize; 799 size_t size; 800 void *buf; 801 u16 pipenum = ep->pipenum; 802 struct m66592 *m66592 = ep->m66592; 803 804 pipe_change(m66592, pipenum); 805 tmp = m66592_read(m66592, ep->fifoctr); 806 if (unlikely((tmp & M66592_FRDY) == 0)) { 807 pipe_stop(m66592, pipenum); 808 pipe_irq_disable(m66592, pipenum); 809 pr_err("write fifo not ready. pipnum=%d\n", pipenum); 810 return; 811 } 812 813 /* prepare parameters */ 814 bufsize = get_buffer_size(m66592, pipenum); 815 buf = req->req.buf + req->req.actual; 816 size = min(bufsize, req->req.length - req->req.actual); 817 818 /* write fifo */ 819 if (req->req.buf) { 820 m66592_write_fifo(m66592, ep, buf, size); 821 if ((size == 0) 822 || ((size % ep->ep.maxpacket) != 0) 823 || ((bufsize != ep->ep.maxpacket) 824 && (bufsize > size))) 825 m66592_bset(m66592, M66592_BVAL, ep->fifoctr); 826 } 827 828 /* update parameters */ 829 req->req.actual += size; 830 /* check transfer finish */ 831 if ((!req->req.zero && (req->req.actual == req->req.length)) 832 || (size % ep->ep.maxpacket) 833 || (size == 0)) { 834 disable_irq_ready(m66592, pipenum); 835 enable_irq_empty(m66592, pipenum); 836 } else { 837 disable_irq_empty(m66592, pipenum); 838 pipe_irq_enable(m66592, pipenum); 839 } 840 } 841 842 static void irq_packet_read(struct m66592_ep *ep, struct m66592_request *req) 843 { 844 u16 tmp; 845 int rcv_len, bufsize, req_len; 846 int size; 847 void *buf; 848 u16 pipenum = ep->pipenum; 849 struct m66592 *m66592 = ep->m66592; 850 int finish = 0; 851 852 pipe_change(m66592, pipenum); 853 tmp = m66592_read(m66592, ep->fifoctr); 854 if (unlikely((tmp & M66592_FRDY) == 0)) { 855 req->req.status = -EPIPE; 856 pipe_stop(m66592, pipenum); 857 pipe_irq_disable(m66592, pipenum); 858 pr_err("read fifo not ready"); 859 return; 860 } 861 862 /* prepare parameters */ 863 rcv_len = tmp & M66592_DTLN; 864 bufsize = get_buffer_size(m66592, pipenum); 865 866 buf = req->req.buf + req->req.actual; 867 req_len = req->req.length - req->req.actual; 868 if (rcv_len < bufsize) 869 size = min(rcv_len, req_len); 870 else 871 size = min(bufsize, req_len); 872 873 /* update parameters */ 874 req->req.actual += size; 875 876 /* check transfer finish */ 877 if ((!req->req.zero && (req->req.actual == req->req.length)) 878 || (size % ep->ep.maxpacket) 879 || (size == 0)) { 880 pipe_stop(m66592, pipenum); 881 pipe_irq_disable(m66592, pipenum); 882 finish = 1; 883 } 884 885 /* read fifo */ 886 if (req->req.buf) { 887 if (size == 0) 888 m66592_write(m66592, M66592_BCLR, ep->fifoctr); 889 else 890 m66592_read_fifo(m66592, ep->fifoaddr, buf, size); 891 } 892 893 if ((ep->pipenum != 0) && finish) 894 transfer_complete(ep, req, 0); 895 } 896 897 static void irq_pipe_ready(struct m66592 *m66592, u16 status, u16 enb) 898 { 899 u16 check; 900 u16 pipenum; 901 struct m66592_ep *ep; 902 struct m66592_request *req; 903 904 if ((status & M66592_BRDY0) && (enb & M66592_BRDY0)) { 905 m66592_write(m66592, ~M66592_BRDY0, M66592_BRDYSTS); 906 m66592_mdfy(m66592, M66592_PIPE0, M66592_CURPIPE, 907 M66592_CFIFOSEL); 908 909 ep = &m66592->ep[0]; 910 req = list_entry(ep->queue.next, struct m66592_request, queue); 911 irq_packet_read(ep, req); 912 } else { 913 for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) { 914 check = 1 << pipenum; 915 if ((status & check) && (enb & check)) { 916 m66592_write(m66592, ~check, M66592_BRDYSTS); 917 ep = m66592->pipenum2ep[pipenum]; 918 req = list_entry(ep->queue.next, 919 struct m66592_request, queue); 920 if (ep->ep.desc->bEndpointAddress & USB_DIR_IN) 921 irq_packet_write(ep, req); 922 else 923 irq_packet_read(ep, req); 924 } 925 } 926 } 927 } 928 929 static void irq_pipe_empty(struct m66592 *m66592, u16 status, u16 enb) 930 { 931 u16 tmp; 932 u16 check; 933 u16 pipenum; 934 struct m66592_ep *ep; 935 struct m66592_request *req; 936 937 if ((status & M66592_BEMP0) && (enb & M66592_BEMP0)) { 938 m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS); 939 940 ep = &m66592->ep[0]; 941 req = list_entry(ep->queue.next, struct m66592_request, queue); 942 irq_ep0_write(ep, req); 943 } else { 944 for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) { 945 check = 1 << pipenum; 946 if ((status & check) && (enb & check)) { 947 m66592_write(m66592, ~check, M66592_BEMPSTS); 948 tmp = control_reg_get(m66592, pipenum); 949 if ((tmp & M66592_INBUFM) == 0) { 950 disable_irq_empty(m66592, pipenum); 951 pipe_irq_disable(m66592, pipenum); 952 pipe_stop(m66592, pipenum); 953 ep = m66592->pipenum2ep[pipenum]; 954 req = list_entry(ep->queue.next, 955 struct m66592_request, 956 queue); 957 if (!list_empty(&ep->queue)) 958 transfer_complete(ep, req, 0); 959 } 960 } 961 } 962 } 963 } 964 965 static void get_status(struct m66592 *m66592, struct usb_ctrlrequest *ctrl) 966 __releases(m66592->lock) 967 __acquires(m66592->lock) 968 { 969 struct m66592_ep *ep; 970 u16 pid; 971 u16 status = 0; 972 u16 w_index = le16_to_cpu(ctrl->wIndex); 973 974 switch (ctrl->bRequestType & USB_RECIP_MASK) { 975 case USB_RECIP_DEVICE: 976 status = 1 << USB_DEVICE_SELF_POWERED; 977 break; 978 case USB_RECIP_INTERFACE: 979 status = 0; 980 break; 981 case USB_RECIP_ENDPOINT: 982 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK]; 983 pid = control_reg_get_pid(m66592, ep->pipenum); 984 if (pid == M66592_PID_STALL) 985 status = 1 << USB_ENDPOINT_HALT; 986 else 987 status = 0; 988 break; 989 default: 990 pipe_stall(m66592, 0); 991 return; /* exit */ 992 } 993 994 m66592->ep0_data = cpu_to_le16(status); 995 m66592->ep0_req->buf = &m66592->ep0_data; 996 m66592->ep0_req->length = 2; 997 /* AV: what happens if we get called again before that gets through? */ 998 spin_unlock(&m66592->lock); 999 m66592_queue(m66592->gadget.ep0, m66592->ep0_req, GFP_KERNEL); 1000 spin_lock(&m66592->lock); 1001 } 1002 1003 static void clear_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl) 1004 { 1005 switch (ctrl->bRequestType & USB_RECIP_MASK) { 1006 case USB_RECIP_DEVICE: 1007 control_end(m66592, 1); 1008 break; 1009 case USB_RECIP_INTERFACE: 1010 control_end(m66592, 1); 1011 break; 1012 case USB_RECIP_ENDPOINT: { 1013 struct m66592_ep *ep; 1014 struct m66592_request *req; 1015 u16 w_index = le16_to_cpu(ctrl->wIndex); 1016 1017 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK]; 1018 pipe_stop(m66592, ep->pipenum); 1019 control_reg_sqclr(m66592, ep->pipenum); 1020 1021 control_end(m66592, 1); 1022 1023 req = list_entry(ep->queue.next, 1024 struct m66592_request, queue); 1025 if (ep->busy) { 1026 ep->busy = 0; 1027 if (list_empty(&ep->queue)) 1028 break; 1029 start_packet(ep, req); 1030 } else if (!list_empty(&ep->queue)) 1031 pipe_start(m66592, ep->pipenum); 1032 } 1033 break; 1034 default: 1035 pipe_stall(m66592, 0); 1036 break; 1037 } 1038 } 1039 1040 static void set_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl) 1041 { 1042 u16 tmp; 1043 int timeout = 3000; 1044 1045 switch (ctrl->bRequestType & USB_RECIP_MASK) { 1046 case USB_RECIP_DEVICE: 1047 switch (le16_to_cpu(ctrl->wValue)) { 1048 case USB_DEVICE_TEST_MODE: 1049 control_end(m66592, 1); 1050 /* Wait for the completion of status stage */ 1051 do { 1052 tmp = m66592_read(m66592, M66592_INTSTS0) & 1053 M66592_CTSQ; 1054 udelay(1); 1055 } while (tmp != M66592_CS_IDST && timeout-- > 0); 1056 1057 if (tmp == M66592_CS_IDST) 1058 m66592_bset(m66592, 1059 le16_to_cpu(ctrl->wIndex >> 8), 1060 M66592_TESTMODE); 1061 break; 1062 default: 1063 pipe_stall(m66592, 0); 1064 break; 1065 } 1066 break; 1067 case USB_RECIP_INTERFACE: 1068 control_end(m66592, 1); 1069 break; 1070 case USB_RECIP_ENDPOINT: { 1071 struct m66592_ep *ep; 1072 u16 w_index = le16_to_cpu(ctrl->wIndex); 1073 1074 ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK]; 1075 pipe_stall(m66592, ep->pipenum); 1076 1077 control_end(m66592, 1); 1078 } 1079 break; 1080 default: 1081 pipe_stall(m66592, 0); 1082 break; 1083 } 1084 } 1085 1086 /* if return value is true, call class driver's setup() */ 1087 static int setup_packet(struct m66592 *m66592, struct usb_ctrlrequest *ctrl) 1088 { 1089 u16 *p = (u16 *)ctrl; 1090 unsigned long offset = M66592_USBREQ; 1091 int i, ret = 0; 1092 1093 /* read fifo */ 1094 m66592_write(m66592, ~M66592_VALID, M66592_INTSTS0); 1095 1096 for (i = 0; i < 4; i++) 1097 p[i] = m66592_read(m66592, offset + i*2); 1098 1099 /* check request */ 1100 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { 1101 switch (ctrl->bRequest) { 1102 case USB_REQ_GET_STATUS: 1103 get_status(m66592, ctrl); 1104 break; 1105 case USB_REQ_CLEAR_FEATURE: 1106 clear_feature(m66592, ctrl); 1107 break; 1108 case USB_REQ_SET_FEATURE: 1109 set_feature(m66592, ctrl); 1110 break; 1111 default: 1112 ret = 1; 1113 break; 1114 } 1115 } else 1116 ret = 1; 1117 return ret; 1118 } 1119 1120 static void m66592_update_usb_speed(struct m66592 *m66592) 1121 { 1122 u16 speed = get_usb_speed(m66592); 1123 1124 switch (speed) { 1125 case M66592_HSMODE: 1126 m66592->gadget.speed = USB_SPEED_HIGH; 1127 break; 1128 case M66592_FSMODE: 1129 m66592->gadget.speed = USB_SPEED_FULL; 1130 break; 1131 default: 1132 m66592->gadget.speed = USB_SPEED_UNKNOWN; 1133 pr_err("USB speed unknown\n"); 1134 } 1135 } 1136 1137 static void irq_device_state(struct m66592 *m66592) 1138 { 1139 u16 dvsq; 1140 1141 dvsq = m66592_read(m66592, M66592_INTSTS0) & M66592_DVSQ; 1142 m66592_write(m66592, ~M66592_DVST, M66592_INTSTS0); 1143 1144 if (dvsq == M66592_DS_DFLT) { /* bus reset */ 1145 usb_gadget_udc_reset(&m66592->gadget, m66592->driver); 1146 m66592_update_usb_speed(m66592); 1147 } 1148 if (m66592->old_dvsq == M66592_DS_CNFG && dvsq != M66592_DS_CNFG) 1149 m66592_update_usb_speed(m66592); 1150 if ((dvsq == M66592_DS_CNFG || dvsq == M66592_DS_ADDS) 1151 && m66592->gadget.speed == USB_SPEED_UNKNOWN) 1152 m66592_update_usb_speed(m66592); 1153 1154 m66592->old_dvsq = dvsq; 1155 } 1156 1157 static void irq_control_stage(struct m66592 *m66592) 1158 __releases(m66592->lock) 1159 __acquires(m66592->lock) 1160 { 1161 struct usb_ctrlrequest ctrl; 1162 u16 ctsq; 1163 1164 ctsq = m66592_read(m66592, M66592_INTSTS0) & M66592_CTSQ; 1165 m66592_write(m66592, ~M66592_CTRT, M66592_INTSTS0); 1166 1167 switch (ctsq) { 1168 case M66592_CS_IDST: { 1169 struct m66592_ep *ep; 1170 struct m66592_request *req; 1171 ep = &m66592->ep[0]; 1172 req = list_entry(ep->queue.next, struct m66592_request, queue); 1173 transfer_complete(ep, req, 0); 1174 } 1175 break; 1176 1177 case M66592_CS_RDDS: 1178 case M66592_CS_WRDS: 1179 case M66592_CS_WRND: 1180 if (setup_packet(m66592, &ctrl)) { 1181 spin_unlock(&m66592->lock); 1182 if (m66592->driver->setup(&m66592->gadget, &ctrl) < 0) 1183 pipe_stall(m66592, 0); 1184 spin_lock(&m66592->lock); 1185 } 1186 break; 1187 case M66592_CS_RDSS: 1188 case M66592_CS_WRSS: 1189 control_end(m66592, 0); 1190 break; 1191 default: 1192 pr_err("ctrl_stage: unexpect ctsq(%x)\n", ctsq); 1193 break; 1194 } 1195 } 1196 1197 static irqreturn_t m66592_irq(int irq, void *_m66592) 1198 { 1199 struct m66592 *m66592 = _m66592; 1200 u16 intsts0; 1201 u16 intenb0; 1202 u16 brdysts, nrdysts, bempsts; 1203 u16 brdyenb, nrdyenb, bempenb; 1204 u16 savepipe; 1205 u16 mask0; 1206 1207 spin_lock(&m66592->lock); 1208 1209 intsts0 = m66592_read(m66592, M66592_INTSTS0); 1210 intenb0 = m66592_read(m66592, M66592_INTENB0); 1211 1212 if (m66592->pdata->on_chip && !intsts0 && !intenb0) { 1213 /* 1214 * When USB clock stops, it cannot read register. Even if a 1215 * clock stops, the interrupt occurs. So this driver turn on 1216 * a clock by this timing and do re-reading of register. 1217 */ 1218 m66592_start_xclock(m66592); 1219 intsts0 = m66592_read(m66592, M66592_INTSTS0); 1220 intenb0 = m66592_read(m66592, M66592_INTENB0); 1221 } 1222 1223 savepipe = m66592_read(m66592, M66592_CFIFOSEL); 1224 1225 mask0 = intsts0 & intenb0; 1226 if (mask0) { 1227 brdysts = m66592_read(m66592, M66592_BRDYSTS); 1228 nrdysts = m66592_read(m66592, M66592_NRDYSTS); 1229 bempsts = m66592_read(m66592, M66592_BEMPSTS); 1230 brdyenb = m66592_read(m66592, M66592_BRDYENB); 1231 nrdyenb = m66592_read(m66592, M66592_NRDYENB); 1232 bempenb = m66592_read(m66592, M66592_BEMPENB); 1233 1234 if (mask0 & M66592_VBINT) { 1235 m66592_write(m66592, 0xffff & ~M66592_VBINT, 1236 M66592_INTSTS0); 1237 m66592_start_xclock(m66592); 1238 1239 /* start vbus sampling */ 1240 m66592->old_vbus = m66592_read(m66592, M66592_INTSTS0) 1241 & M66592_VBSTS; 1242 m66592->scount = M66592_MAX_SAMPLING; 1243 1244 mod_timer(&m66592->timer, 1245 jiffies + msecs_to_jiffies(50)); 1246 } 1247 if (intsts0 & M66592_DVSQ) 1248 irq_device_state(m66592); 1249 1250 if ((intsts0 & M66592_BRDY) && (intenb0 & M66592_BRDYE) 1251 && (brdysts & brdyenb)) { 1252 irq_pipe_ready(m66592, brdysts, brdyenb); 1253 } 1254 if ((intsts0 & M66592_BEMP) && (intenb0 & M66592_BEMPE) 1255 && (bempsts & bempenb)) { 1256 irq_pipe_empty(m66592, bempsts, bempenb); 1257 } 1258 1259 if (intsts0 & M66592_CTRT) 1260 irq_control_stage(m66592); 1261 } 1262 1263 m66592_write(m66592, savepipe, M66592_CFIFOSEL); 1264 1265 spin_unlock(&m66592->lock); 1266 return IRQ_HANDLED; 1267 } 1268 1269 static void m66592_timer(unsigned long _m66592) 1270 { 1271 struct m66592 *m66592 = (struct m66592 *)_m66592; 1272 unsigned long flags; 1273 u16 tmp; 1274 1275 spin_lock_irqsave(&m66592->lock, flags); 1276 tmp = m66592_read(m66592, M66592_SYSCFG); 1277 if (!(tmp & M66592_RCKE)) { 1278 m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG); 1279 udelay(10); 1280 m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG); 1281 } 1282 if (m66592->scount > 0) { 1283 tmp = m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS; 1284 if (tmp == m66592->old_vbus) { 1285 m66592->scount--; 1286 if (m66592->scount == 0) { 1287 if (tmp == M66592_VBSTS) 1288 m66592_usb_connect(m66592); 1289 else 1290 m66592_usb_disconnect(m66592); 1291 } else { 1292 mod_timer(&m66592->timer, 1293 jiffies + msecs_to_jiffies(50)); 1294 } 1295 } else { 1296 m66592->scount = M66592_MAX_SAMPLING; 1297 m66592->old_vbus = tmp; 1298 mod_timer(&m66592->timer, 1299 jiffies + msecs_to_jiffies(50)); 1300 } 1301 } 1302 spin_unlock_irqrestore(&m66592->lock, flags); 1303 } 1304 1305 /*-------------------------------------------------------------------------*/ 1306 static int m66592_enable(struct usb_ep *_ep, 1307 const struct usb_endpoint_descriptor *desc) 1308 { 1309 struct m66592_ep *ep; 1310 1311 ep = container_of(_ep, struct m66592_ep, ep); 1312 return alloc_pipe_config(ep, desc); 1313 } 1314 1315 static int m66592_disable(struct usb_ep *_ep) 1316 { 1317 struct m66592_ep *ep; 1318 struct m66592_request *req; 1319 unsigned long flags; 1320 1321 ep = container_of(_ep, struct m66592_ep, ep); 1322 BUG_ON(!ep); 1323 1324 while (!list_empty(&ep->queue)) { 1325 req = list_entry(ep->queue.next, struct m66592_request, queue); 1326 spin_lock_irqsave(&ep->m66592->lock, flags); 1327 transfer_complete(ep, req, -ECONNRESET); 1328 spin_unlock_irqrestore(&ep->m66592->lock, flags); 1329 } 1330 1331 pipe_irq_disable(ep->m66592, ep->pipenum); 1332 return free_pipe_config(ep); 1333 } 1334 1335 static struct usb_request *m66592_alloc_request(struct usb_ep *_ep, 1336 gfp_t gfp_flags) 1337 { 1338 struct m66592_request *req; 1339 1340 req = kzalloc(sizeof(struct m66592_request), gfp_flags); 1341 if (!req) 1342 return NULL; 1343 1344 INIT_LIST_HEAD(&req->queue); 1345 1346 return &req->req; 1347 } 1348 1349 static void m66592_free_request(struct usb_ep *_ep, struct usb_request *_req) 1350 { 1351 struct m66592_request *req; 1352 1353 req = container_of(_req, struct m66592_request, req); 1354 kfree(req); 1355 } 1356 1357 static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req, 1358 gfp_t gfp_flags) 1359 { 1360 struct m66592_ep *ep; 1361 struct m66592_request *req; 1362 unsigned long flags; 1363 int request = 0; 1364 1365 ep = container_of(_ep, struct m66592_ep, ep); 1366 req = container_of(_req, struct m66592_request, req); 1367 1368 if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN) 1369 return -ESHUTDOWN; 1370 1371 spin_lock_irqsave(&ep->m66592->lock, flags); 1372 1373 if (list_empty(&ep->queue)) 1374 request = 1; 1375 1376 list_add_tail(&req->queue, &ep->queue); 1377 req->req.actual = 0; 1378 req->req.status = -EINPROGRESS; 1379 1380 if (ep->ep.desc == NULL) /* control */ 1381 start_ep0(ep, req); 1382 else { 1383 if (request && !ep->busy) 1384 start_packet(ep, req); 1385 } 1386 1387 spin_unlock_irqrestore(&ep->m66592->lock, flags); 1388 1389 return 0; 1390 } 1391 1392 static int m66592_dequeue(struct usb_ep *_ep, struct usb_request *_req) 1393 { 1394 struct m66592_ep *ep; 1395 struct m66592_request *req; 1396 unsigned long flags; 1397 1398 ep = container_of(_ep, struct m66592_ep, ep); 1399 req = container_of(_req, struct m66592_request, req); 1400 1401 spin_lock_irqsave(&ep->m66592->lock, flags); 1402 if (!list_empty(&ep->queue)) 1403 transfer_complete(ep, req, -ECONNRESET); 1404 spin_unlock_irqrestore(&ep->m66592->lock, flags); 1405 1406 return 0; 1407 } 1408 1409 static int m66592_set_halt(struct usb_ep *_ep, int value) 1410 { 1411 struct m66592_ep *ep; 1412 struct m66592_request *req; 1413 unsigned long flags; 1414 int ret = 0; 1415 1416 ep = container_of(_ep, struct m66592_ep, ep); 1417 req = list_entry(ep->queue.next, struct m66592_request, queue); 1418 1419 spin_lock_irqsave(&ep->m66592->lock, flags); 1420 if (!list_empty(&ep->queue)) { 1421 ret = -EAGAIN; 1422 goto out; 1423 } 1424 if (value) { 1425 ep->busy = 1; 1426 pipe_stall(ep->m66592, ep->pipenum); 1427 } else { 1428 ep->busy = 0; 1429 pipe_stop(ep->m66592, ep->pipenum); 1430 } 1431 1432 out: 1433 spin_unlock_irqrestore(&ep->m66592->lock, flags); 1434 return ret; 1435 } 1436 1437 static void m66592_fifo_flush(struct usb_ep *_ep) 1438 { 1439 struct m66592_ep *ep; 1440 unsigned long flags; 1441 1442 ep = container_of(_ep, struct m66592_ep, ep); 1443 spin_lock_irqsave(&ep->m66592->lock, flags); 1444 if (list_empty(&ep->queue) && !ep->busy) { 1445 pipe_stop(ep->m66592, ep->pipenum); 1446 m66592_bclr(ep->m66592, M66592_BCLR, ep->fifoctr); 1447 } 1448 spin_unlock_irqrestore(&ep->m66592->lock, flags); 1449 } 1450 1451 static struct usb_ep_ops m66592_ep_ops = { 1452 .enable = m66592_enable, 1453 .disable = m66592_disable, 1454 1455 .alloc_request = m66592_alloc_request, 1456 .free_request = m66592_free_request, 1457 1458 .queue = m66592_queue, 1459 .dequeue = m66592_dequeue, 1460 1461 .set_halt = m66592_set_halt, 1462 .fifo_flush = m66592_fifo_flush, 1463 }; 1464 1465 /*-------------------------------------------------------------------------*/ 1466 static int m66592_udc_start(struct usb_gadget *g, 1467 struct usb_gadget_driver *driver) 1468 { 1469 struct m66592 *m66592 = to_m66592(g); 1470 1471 /* hook up the driver */ 1472 driver->driver.bus = NULL; 1473 m66592->driver = driver; 1474 1475 m66592_bset(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0); 1476 if (m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS) { 1477 m66592_start_xclock(m66592); 1478 /* start vbus sampling */ 1479 m66592->old_vbus = m66592_read(m66592, 1480 M66592_INTSTS0) & M66592_VBSTS; 1481 m66592->scount = M66592_MAX_SAMPLING; 1482 mod_timer(&m66592->timer, jiffies + msecs_to_jiffies(50)); 1483 } 1484 1485 return 0; 1486 } 1487 1488 static int m66592_udc_stop(struct usb_gadget *g) 1489 { 1490 struct m66592 *m66592 = to_m66592(g); 1491 1492 m66592_bclr(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0); 1493 1494 init_controller(m66592); 1495 disable_controller(m66592); 1496 1497 m66592->driver = NULL; 1498 1499 return 0; 1500 } 1501 1502 /*-------------------------------------------------------------------------*/ 1503 static int m66592_get_frame(struct usb_gadget *_gadget) 1504 { 1505 struct m66592 *m66592 = gadget_to_m66592(_gadget); 1506 return m66592_read(m66592, M66592_FRMNUM) & 0x03FF; 1507 } 1508 1509 static int m66592_pullup(struct usb_gadget *gadget, int is_on) 1510 { 1511 struct m66592 *m66592 = gadget_to_m66592(gadget); 1512 unsigned long flags; 1513 1514 spin_lock_irqsave(&m66592->lock, flags); 1515 if (is_on) 1516 m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG); 1517 else 1518 m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG); 1519 spin_unlock_irqrestore(&m66592->lock, flags); 1520 1521 return 0; 1522 } 1523 1524 static const struct usb_gadget_ops m66592_gadget_ops = { 1525 .get_frame = m66592_get_frame, 1526 .udc_start = m66592_udc_start, 1527 .udc_stop = m66592_udc_stop, 1528 .pullup = m66592_pullup, 1529 }; 1530 1531 static int m66592_remove(struct platform_device *pdev) 1532 { 1533 struct m66592 *m66592 = platform_get_drvdata(pdev); 1534 1535 usb_del_gadget_udc(&m66592->gadget); 1536 1537 del_timer_sync(&m66592->timer); 1538 iounmap(m66592->reg); 1539 free_irq(platform_get_irq(pdev, 0), m66592); 1540 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req); 1541 if (m66592->pdata->on_chip) { 1542 clk_disable(m66592->clk); 1543 clk_put(m66592->clk); 1544 } 1545 kfree(m66592); 1546 return 0; 1547 } 1548 1549 static void nop_completion(struct usb_ep *ep, struct usb_request *r) 1550 { 1551 } 1552 1553 static int m66592_probe(struct platform_device *pdev) 1554 { 1555 struct resource *res, *ires; 1556 void __iomem *reg = NULL; 1557 struct m66592 *m66592 = NULL; 1558 char clk_name[8]; 1559 int ret = 0; 1560 int i; 1561 1562 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1563 if (!res) { 1564 ret = -ENODEV; 1565 pr_err("platform_get_resource error.\n"); 1566 goto clean_up; 1567 } 1568 1569 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 1570 if (!ires) { 1571 ret = -ENODEV; 1572 dev_err(&pdev->dev, 1573 "platform_get_resource IORESOURCE_IRQ error.\n"); 1574 goto clean_up; 1575 } 1576 1577 reg = ioremap(res->start, resource_size(res)); 1578 if (reg == NULL) { 1579 ret = -ENOMEM; 1580 pr_err("ioremap error.\n"); 1581 goto clean_up; 1582 } 1583 1584 if (dev_get_platdata(&pdev->dev) == NULL) { 1585 dev_err(&pdev->dev, "no platform data\n"); 1586 ret = -ENODEV; 1587 goto clean_up; 1588 } 1589 1590 /* initialize ucd */ 1591 m66592 = kzalloc(sizeof(struct m66592), GFP_KERNEL); 1592 if (m66592 == NULL) { 1593 ret = -ENOMEM; 1594 goto clean_up; 1595 } 1596 1597 m66592->pdata = dev_get_platdata(&pdev->dev); 1598 m66592->irq_trigger = ires->flags & IRQF_TRIGGER_MASK; 1599 1600 spin_lock_init(&m66592->lock); 1601 platform_set_drvdata(pdev, m66592); 1602 1603 m66592->gadget.ops = &m66592_gadget_ops; 1604 m66592->gadget.max_speed = USB_SPEED_HIGH; 1605 m66592->gadget.name = udc_name; 1606 1607 init_timer(&m66592->timer); 1608 m66592->timer.function = m66592_timer; 1609 m66592->timer.data = (unsigned long)m66592; 1610 m66592->reg = reg; 1611 1612 ret = request_irq(ires->start, m66592_irq, IRQF_SHARED, 1613 udc_name, m66592); 1614 if (ret < 0) { 1615 pr_err("request_irq error (%d)\n", ret); 1616 goto clean_up; 1617 } 1618 1619 if (m66592->pdata->on_chip) { 1620 snprintf(clk_name, sizeof(clk_name), "usbf%d", pdev->id); 1621 m66592->clk = clk_get(&pdev->dev, clk_name); 1622 if (IS_ERR(m66592->clk)) { 1623 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", 1624 clk_name); 1625 ret = PTR_ERR(m66592->clk); 1626 goto clean_up2; 1627 } 1628 clk_enable(m66592->clk); 1629 } 1630 1631 INIT_LIST_HEAD(&m66592->gadget.ep_list); 1632 m66592->gadget.ep0 = &m66592->ep[0].ep; 1633 INIT_LIST_HEAD(&m66592->gadget.ep0->ep_list); 1634 for (i = 0; i < M66592_MAX_NUM_PIPE; i++) { 1635 struct m66592_ep *ep = &m66592->ep[i]; 1636 1637 if (i != 0) { 1638 INIT_LIST_HEAD(&m66592->ep[i].ep.ep_list); 1639 list_add_tail(&m66592->ep[i].ep.ep_list, 1640 &m66592->gadget.ep_list); 1641 } 1642 ep->m66592 = m66592; 1643 INIT_LIST_HEAD(&ep->queue); 1644 ep->ep.name = m66592_ep_name[i]; 1645 ep->ep.ops = &m66592_ep_ops; 1646 usb_ep_set_maxpacket_limit(&ep->ep, 512); 1647 1648 if (i == 0) { 1649 ep->ep.caps.type_control = true; 1650 } else { 1651 ep->ep.caps.type_iso = true; 1652 ep->ep.caps.type_bulk = true; 1653 ep->ep.caps.type_int = true; 1654 } 1655 1656 ep->ep.caps.dir_in = true; 1657 ep->ep.caps.dir_out = true; 1658 } 1659 usb_ep_set_maxpacket_limit(&m66592->ep[0].ep, 64); 1660 m66592->ep[0].pipenum = 0; 1661 m66592->ep[0].fifoaddr = M66592_CFIFO; 1662 m66592->ep[0].fifosel = M66592_CFIFOSEL; 1663 m66592->ep[0].fifoctr = M66592_CFIFOCTR; 1664 m66592->ep[0].fifotrn = 0; 1665 m66592->ep[0].pipectr = get_pipectr_addr(0); 1666 m66592->pipenum2ep[0] = &m66592->ep[0]; 1667 m66592->epaddr2ep[0] = &m66592->ep[0]; 1668 1669 m66592->ep0_req = m66592_alloc_request(&m66592->ep[0].ep, GFP_KERNEL); 1670 if (m66592->ep0_req == NULL) { 1671 ret = -ENOMEM; 1672 goto clean_up3; 1673 } 1674 m66592->ep0_req->complete = nop_completion; 1675 1676 init_controller(m66592); 1677 1678 ret = usb_add_gadget_udc(&pdev->dev, &m66592->gadget); 1679 if (ret) 1680 goto err_add_udc; 1681 1682 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION); 1683 return 0; 1684 1685 err_add_udc: 1686 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req); 1687 1688 clean_up3: 1689 if (m66592->pdata->on_chip) { 1690 clk_disable(m66592->clk); 1691 clk_put(m66592->clk); 1692 } 1693 clean_up2: 1694 free_irq(ires->start, m66592); 1695 clean_up: 1696 if (m66592) { 1697 if (m66592->ep0_req) 1698 m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req); 1699 kfree(m66592); 1700 } 1701 if (reg) 1702 iounmap(reg); 1703 1704 return ret; 1705 } 1706 1707 /*-------------------------------------------------------------------------*/ 1708 static struct platform_driver m66592_driver = { 1709 .remove = m66592_remove, 1710 .driver = { 1711 .name = (char *) udc_name, 1712 }, 1713 }; 1714 1715 module_platform_driver_probe(m66592_driver, m66592_probe); 1716