1 /* 2 * R8A66597 HCD (Host Controller Driver) 3 * 4 * Copyright (C) 2006-2007 Renesas Solutions Corp. 5 * Portions Copyright (C) 2004 Psion Teklogix (for NetBook PRO) 6 * Portions Copyright (C) 2004-2005 David Brownell 7 * Portions Copyright (C) 1999 Roman Weissgaerber 8 * 9 * Author : Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; version 2 of the License. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 23 * 24 */ 25 26 #include <linux/module.h> 27 #include <linux/kernel.h> 28 #include <linux/sched.h> 29 #include <linux/smp_lock.h> 30 #include <linux/errno.h> 31 #include <linux/init.h> 32 #include <linux/timer.h> 33 #include <linux/delay.h> 34 #include <linux/list.h> 35 #include <linux/interrupt.h> 36 #include <linux/usb.h> 37 #include <linux/platform_device.h> 38 #include <linux/io.h> 39 #include <linux/irq.h> 40 41 #include "../core/hcd.h" 42 #include "r8a66597.h" 43 44 MODULE_DESCRIPTION("R8A66597 USB Host Controller Driver"); 45 MODULE_LICENSE("GPL"); 46 MODULE_AUTHOR("Yoshihiro Shimoda"); 47 MODULE_ALIAS("platform:r8a66597_hcd"); 48 49 #define DRIVER_VERSION "10 Apr 2008" 50 51 static const char hcd_name[] = "r8a66597_hcd"; 52 53 /* module parameters */ 54 #if !defined(CONFIG_SUPERH_ON_CHIP_R8A66597) 55 static unsigned short clock = XTAL12; 56 module_param(clock, ushort, 0644); 57 MODULE_PARM_DESC(clock, "input clock: 48MHz=32768, 24MHz=16384, 12MHz=0 " 58 "(default=0)"); 59 #endif 60 61 static unsigned short vif = LDRV; 62 module_param(vif, ushort, 0644); 63 MODULE_PARM_DESC(vif, "input VIF: 3.3V=32768, 1.5V=0(default=32768)"); 64 65 static unsigned short endian; 66 module_param(endian, ushort, 0644); 67 MODULE_PARM_DESC(endian, "data endian: big=256, little=0 (default=0)"); 68 69 static unsigned short irq_sense = 0xff; 70 module_param(irq_sense, ushort, 0644); 71 MODULE_PARM_DESC(irq_sense, "IRQ sense: low level=32, falling edge=0 " 72 "(default=32)"); 73 74 static void packet_write(struct r8a66597 *r8a66597, u16 pipenum); 75 static int r8a66597_get_frame(struct usb_hcd *hcd); 76 77 /* this function must be called with interrupt disabled */ 78 static void enable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum, 79 unsigned long reg) 80 { 81 u16 tmp; 82 83 tmp = r8a66597_read(r8a66597, INTENB0); 84 r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0); 85 r8a66597_bset(r8a66597, 1 << pipenum, reg); 86 r8a66597_write(r8a66597, tmp, INTENB0); 87 } 88 89 /* this function must be called with interrupt disabled */ 90 static void disable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum, 91 unsigned long reg) 92 { 93 u16 tmp; 94 95 tmp = r8a66597_read(r8a66597, INTENB0); 96 r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0); 97 r8a66597_bclr(r8a66597, 1 << pipenum, reg); 98 r8a66597_write(r8a66597, tmp, INTENB0); 99 } 100 101 static void set_devadd_reg(struct r8a66597 *r8a66597, u8 r8a66597_address, 102 u16 usbspd, u8 upphub, u8 hubport, int port) 103 { 104 u16 val; 105 unsigned long devadd_reg = get_devadd_addr(r8a66597_address); 106 107 val = (upphub << 11) | (hubport << 8) | (usbspd << 6) | (port & 0x0001); 108 r8a66597_write(r8a66597, val, devadd_reg); 109 } 110 111 static int r8a66597_clock_enable(struct r8a66597 *r8a66597) 112 { 113 u16 tmp; 114 int i = 0; 115 116 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) 117 #if defined(CONFIG_HAVE_CLK) 118 clk_enable(r8a66597->clk); 119 #endif 120 do { 121 r8a66597_write(r8a66597, SCKE, SYSCFG0); 122 tmp = r8a66597_read(r8a66597, SYSCFG0); 123 if (i++ > 1000) { 124 printk(KERN_ERR "r8a66597: register access fail.\n"); 125 return -ENXIO; 126 } 127 } while ((tmp & SCKE) != SCKE); 128 r8a66597_write(r8a66597, 0x04, 0x02); 129 #else 130 do { 131 r8a66597_write(r8a66597, USBE, SYSCFG0); 132 tmp = r8a66597_read(r8a66597, SYSCFG0); 133 if (i++ > 1000) { 134 printk(KERN_ERR "r8a66597: register access fail.\n"); 135 return -ENXIO; 136 } 137 } while ((tmp & USBE) != USBE); 138 r8a66597_bclr(r8a66597, USBE, SYSCFG0); 139 r8a66597_mdfy(r8a66597, clock, XTAL, SYSCFG0); 140 141 i = 0; 142 r8a66597_bset(r8a66597, XCKE, SYSCFG0); 143 do { 144 msleep(1); 145 tmp = r8a66597_read(r8a66597, SYSCFG0); 146 if (i++ > 500) { 147 printk(KERN_ERR "r8a66597: register access fail.\n"); 148 return -ENXIO; 149 } 150 } while ((tmp & SCKE) != SCKE); 151 #endif /* #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) */ 152 153 return 0; 154 } 155 156 static void r8a66597_clock_disable(struct r8a66597 *r8a66597) 157 { 158 r8a66597_bclr(r8a66597, SCKE, SYSCFG0); 159 udelay(1); 160 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) 161 #if defined(CONFIG_HAVE_CLK) 162 clk_disable(r8a66597->clk); 163 #endif 164 #else 165 r8a66597_bclr(r8a66597, PLLC, SYSCFG0); 166 r8a66597_bclr(r8a66597, XCKE, SYSCFG0); 167 r8a66597_bclr(r8a66597, USBE, SYSCFG0); 168 #endif 169 } 170 171 static void r8a66597_enable_port(struct r8a66597 *r8a66597, int port) 172 { 173 u16 val; 174 175 val = port ? DRPD : DCFM | DRPD; 176 r8a66597_bset(r8a66597, val, get_syscfg_reg(port)); 177 r8a66597_bset(r8a66597, HSE, get_syscfg_reg(port)); 178 179 r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, get_dmacfg_reg(port)); 180 r8a66597_bclr(r8a66597, DTCHE, get_intenb_reg(port)); 181 r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port)); 182 } 183 184 static void r8a66597_disable_port(struct r8a66597 *r8a66597, int port) 185 { 186 u16 val, tmp; 187 188 r8a66597_write(r8a66597, 0, get_intenb_reg(port)); 189 r8a66597_write(r8a66597, 0, get_intsts_reg(port)); 190 191 r8a66597_port_power(r8a66597, port, 0); 192 193 do { 194 tmp = r8a66597_read(r8a66597, SOFCFG) & EDGESTS; 195 udelay(640); 196 } while (tmp == EDGESTS); 197 198 val = port ? DRPD : DCFM | DRPD; 199 r8a66597_bclr(r8a66597, val, get_syscfg_reg(port)); 200 r8a66597_bclr(r8a66597, HSE, get_syscfg_reg(port)); 201 } 202 203 static int enable_controller(struct r8a66597 *r8a66597) 204 { 205 int ret, port; 206 207 ret = r8a66597_clock_enable(r8a66597); 208 if (ret < 0) 209 return ret; 210 211 r8a66597_bset(r8a66597, vif & LDRV, PINCFG); 212 r8a66597_bset(r8a66597, USBE, SYSCFG0); 213 214 r8a66597_bset(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0); 215 r8a66597_bset(r8a66597, irq_sense & INTL, SOFCFG); 216 r8a66597_bset(r8a66597, BRDY0, BRDYENB); 217 r8a66597_bset(r8a66597, BEMP0, BEMPENB); 218 219 r8a66597_bset(r8a66597, endian & BIGEND, CFIFOSEL); 220 r8a66597_bset(r8a66597, endian & BIGEND, D0FIFOSEL); 221 r8a66597_bset(r8a66597, endian & BIGEND, D1FIFOSEL); 222 r8a66597_bset(r8a66597, TRNENSEL, SOFCFG); 223 224 r8a66597_bset(r8a66597, SIGNE | SACKE, INTENB1); 225 226 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) 227 r8a66597_enable_port(r8a66597, port); 228 229 return 0; 230 } 231 232 static void disable_controller(struct r8a66597 *r8a66597) 233 { 234 int port; 235 236 r8a66597_write(r8a66597, 0, INTENB0); 237 r8a66597_write(r8a66597, 0, INTSTS0); 238 239 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) 240 r8a66597_disable_port(r8a66597, port); 241 242 r8a66597_clock_disable(r8a66597); 243 } 244 245 static int get_parent_r8a66597_address(struct r8a66597 *r8a66597, 246 struct usb_device *udev) 247 { 248 struct r8a66597_device *dev; 249 250 if (udev->parent && udev->parent->devnum != 1) 251 udev = udev->parent; 252 253 dev = dev_get_drvdata(&udev->dev); 254 if (dev) 255 return dev->address; 256 else 257 return 0; 258 } 259 260 static int is_child_device(char *devpath) 261 { 262 return (devpath[2] ? 1 : 0); 263 } 264 265 static int is_hub_limit(char *devpath) 266 { 267 return ((strlen(devpath) >= 4) ? 1 : 0); 268 } 269 270 static void get_port_number(char *devpath, u16 *root_port, u16 *hub_port) 271 { 272 if (root_port) { 273 *root_port = (devpath[0] & 0x0F) - 1; 274 if (*root_port >= R8A66597_MAX_ROOT_HUB) 275 printk(KERN_ERR "r8a66597: Illegal root port number.\n"); 276 } 277 if (hub_port) 278 *hub_port = devpath[2] & 0x0F; 279 } 280 281 static u16 get_r8a66597_usb_speed(enum usb_device_speed speed) 282 { 283 u16 usbspd = 0; 284 285 switch (speed) { 286 case USB_SPEED_LOW: 287 usbspd = LSMODE; 288 break; 289 case USB_SPEED_FULL: 290 usbspd = FSMODE; 291 break; 292 case USB_SPEED_HIGH: 293 usbspd = HSMODE; 294 break; 295 default: 296 printk(KERN_ERR "r8a66597: unknown speed\n"); 297 break; 298 } 299 300 return usbspd; 301 } 302 303 static void set_child_connect_map(struct r8a66597 *r8a66597, int address) 304 { 305 int idx; 306 307 idx = address / 32; 308 r8a66597->child_connect_map[idx] |= 1 << (address % 32); 309 } 310 311 static void put_child_connect_map(struct r8a66597 *r8a66597, int address) 312 { 313 int idx; 314 315 idx = address / 32; 316 r8a66597->child_connect_map[idx] &= ~(1 << (address % 32)); 317 } 318 319 static void set_pipe_reg_addr(struct r8a66597_pipe *pipe, u8 dma_ch) 320 { 321 u16 pipenum = pipe->info.pipenum; 322 const unsigned long fifoaddr[] = {D0FIFO, D1FIFO, CFIFO}; 323 const unsigned long fifosel[] = {D0FIFOSEL, D1FIFOSEL, CFIFOSEL}; 324 const unsigned long fifoctr[] = {D0FIFOCTR, D1FIFOCTR, CFIFOCTR}; 325 326 if (dma_ch > R8A66597_PIPE_NO_DMA) /* dma fifo not use? */ 327 dma_ch = R8A66597_PIPE_NO_DMA; 328 329 pipe->fifoaddr = fifoaddr[dma_ch]; 330 pipe->fifosel = fifosel[dma_ch]; 331 pipe->fifoctr = fifoctr[dma_ch]; 332 333 if (pipenum == 0) 334 pipe->pipectr = DCPCTR; 335 else 336 pipe->pipectr = get_pipectr_addr(pipenum); 337 338 if (check_bulk_or_isoc(pipenum)) { 339 pipe->pipetre = get_pipetre_addr(pipenum); 340 pipe->pipetrn = get_pipetrn_addr(pipenum); 341 } else { 342 pipe->pipetre = 0; 343 pipe->pipetrn = 0; 344 } 345 } 346 347 static struct r8a66597_device * 348 get_urb_to_r8a66597_dev(struct r8a66597 *r8a66597, struct urb *urb) 349 { 350 if (usb_pipedevice(urb->pipe) == 0) 351 return &r8a66597->device0; 352 353 return dev_get_drvdata(&urb->dev->dev); 354 } 355 356 static int make_r8a66597_device(struct r8a66597 *r8a66597, 357 struct urb *urb, u8 addr) 358 { 359 struct r8a66597_device *dev; 360 int usb_address = urb->setup_packet[2]; /* urb->pipe is address 0 */ 361 362 dev = kzalloc(sizeof(struct r8a66597_device), GFP_ATOMIC); 363 if (dev == NULL) 364 return -ENOMEM; 365 366 dev_set_drvdata(&urb->dev->dev, dev); 367 dev->udev = urb->dev; 368 dev->address = addr; 369 dev->usb_address = usb_address; 370 dev->state = USB_STATE_ADDRESS; 371 dev->ep_in_toggle = 0; 372 dev->ep_out_toggle = 0; 373 INIT_LIST_HEAD(&dev->device_list); 374 list_add_tail(&dev->device_list, &r8a66597->child_device); 375 376 get_port_number(urb->dev->devpath, &dev->root_port, &dev->hub_port); 377 if (!is_child_device(urb->dev->devpath)) 378 r8a66597->root_hub[dev->root_port].dev = dev; 379 380 set_devadd_reg(r8a66597, dev->address, 381 get_r8a66597_usb_speed(urb->dev->speed), 382 get_parent_r8a66597_address(r8a66597, urb->dev), 383 dev->hub_port, dev->root_port); 384 385 return 0; 386 } 387 388 /* this function must be called with interrupt disabled */ 389 static u8 alloc_usb_address(struct r8a66597 *r8a66597, struct urb *urb) 390 { 391 u8 addr; /* R8A66597's address */ 392 struct r8a66597_device *dev; 393 394 if (is_hub_limit(urb->dev->devpath)) { 395 dev_err(&urb->dev->dev, "External hub limit reached.\n"); 396 return 0; 397 } 398 399 dev = get_urb_to_r8a66597_dev(r8a66597, urb); 400 if (dev && dev->state >= USB_STATE_ADDRESS) 401 return dev->address; 402 403 for (addr = 1; addr <= R8A66597_MAX_DEVICE; addr++) { 404 if (r8a66597->address_map & (1 << addr)) 405 continue; 406 407 dbg("alloc_address: r8a66597_addr=%d", addr); 408 r8a66597->address_map |= 1 << addr; 409 410 if (make_r8a66597_device(r8a66597, urb, addr) < 0) 411 return 0; 412 413 return addr; 414 } 415 416 dev_err(&urb->dev->dev, 417 "cannot communicate with a USB device more than 10.(%x)\n", 418 r8a66597->address_map); 419 420 return 0; 421 } 422 423 /* this function must be called with interrupt disabled */ 424 static void free_usb_address(struct r8a66597 *r8a66597, 425 struct r8a66597_device *dev) 426 { 427 int port; 428 429 if (!dev) 430 return; 431 432 dbg("free_addr: addr=%d", dev->address); 433 434 dev->state = USB_STATE_DEFAULT; 435 r8a66597->address_map &= ~(1 << dev->address); 436 dev->address = 0; 437 dev_set_drvdata(&dev->udev->dev, NULL); 438 list_del(&dev->device_list); 439 kfree(dev); 440 441 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) { 442 if (r8a66597->root_hub[port].dev == dev) { 443 r8a66597->root_hub[port].dev = NULL; 444 break; 445 } 446 } 447 } 448 449 static void r8a66597_reg_wait(struct r8a66597 *r8a66597, unsigned long reg, 450 u16 mask, u16 loop) 451 { 452 u16 tmp; 453 int i = 0; 454 455 do { 456 tmp = r8a66597_read(r8a66597, reg); 457 if (i++ > 1000000) { 458 printk(KERN_ERR "r8a66597: register%lx, loop %x " 459 "is timeout\n", reg, loop); 460 break; 461 } 462 ndelay(1); 463 } while ((tmp & mask) != loop); 464 } 465 466 /* this function must be called with interrupt disabled */ 467 static void pipe_start(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe) 468 { 469 u16 tmp; 470 471 tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID; 472 if ((pipe->info.pipenum != 0) & ((tmp & PID_STALL) != 0)) /* stall? */ 473 r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr); 474 r8a66597_mdfy(r8a66597, PID_BUF, PID, pipe->pipectr); 475 } 476 477 /* this function must be called with interrupt disabled */ 478 static void pipe_stop(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe) 479 { 480 u16 tmp; 481 482 tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID; 483 if ((tmp & PID_STALL11) != PID_STALL11) /* force stall? */ 484 r8a66597_mdfy(r8a66597, PID_STALL, PID, pipe->pipectr); 485 r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr); 486 r8a66597_reg_wait(r8a66597, pipe->pipectr, PBUSY, 0); 487 } 488 489 /* this function must be called with interrupt disabled */ 490 static void clear_all_buffer(struct r8a66597 *r8a66597, 491 struct r8a66597_pipe *pipe) 492 { 493 u16 tmp; 494 495 if (!pipe || pipe->info.pipenum == 0) 496 return; 497 498 pipe_stop(r8a66597, pipe); 499 r8a66597_bset(r8a66597, ACLRM, pipe->pipectr); 500 tmp = r8a66597_read(r8a66597, pipe->pipectr); 501 tmp = r8a66597_read(r8a66597, pipe->pipectr); 502 tmp = r8a66597_read(r8a66597, pipe->pipectr); 503 r8a66597_bclr(r8a66597, ACLRM, pipe->pipectr); 504 } 505 506 /* this function must be called with interrupt disabled */ 507 static void r8a66597_pipe_toggle(struct r8a66597 *r8a66597, 508 struct r8a66597_pipe *pipe, int toggle) 509 { 510 if (toggle) 511 r8a66597_bset(r8a66597, SQSET, pipe->pipectr); 512 else 513 r8a66597_bset(r8a66597, SQCLR, pipe->pipectr); 514 } 515 516 /* this function must be called with interrupt disabled */ 517 static inline void cfifo_change(struct r8a66597 *r8a66597, u16 pipenum) 518 { 519 r8a66597_mdfy(r8a66597, MBW | pipenum, MBW | CURPIPE, CFIFOSEL); 520 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, pipenum); 521 } 522 523 /* this function must be called with interrupt disabled */ 524 static inline void fifo_change_from_pipe(struct r8a66597 *r8a66597, 525 struct r8a66597_pipe *pipe) 526 { 527 cfifo_change(r8a66597, 0); 528 r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D0FIFOSEL); 529 r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D1FIFOSEL); 530 531 r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum, MBW | CURPIPE, 532 pipe->fifosel); 533 r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE, pipe->info.pipenum); 534 } 535 536 static u16 r8a66597_get_pipenum(struct urb *urb, struct usb_host_endpoint *hep) 537 { 538 struct r8a66597_pipe *pipe = hep->hcpriv; 539 540 if (usb_pipeendpoint(urb->pipe) == 0) 541 return 0; 542 else 543 return pipe->info.pipenum; 544 } 545 546 static u16 get_urb_to_r8a66597_addr(struct r8a66597 *r8a66597, struct urb *urb) 547 { 548 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb); 549 550 return (usb_pipedevice(urb->pipe) == 0) ? 0 : dev->address; 551 } 552 553 static unsigned short *get_toggle_pointer(struct r8a66597_device *dev, 554 int urb_pipe) 555 { 556 if (!dev) 557 return NULL; 558 559 return usb_pipein(urb_pipe) ? &dev->ep_in_toggle : &dev->ep_out_toggle; 560 } 561 562 /* this function must be called with interrupt disabled */ 563 static void pipe_toggle_set(struct r8a66597 *r8a66597, 564 struct r8a66597_pipe *pipe, 565 struct urb *urb, int set) 566 { 567 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb); 568 unsigned char endpoint = usb_pipeendpoint(urb->pipe); 569 unsigned short *toggle = get_toggle_pointer(dev, urb->pipe); 570 571 if (!toggle) 572 return; 573 574 if (set) 575 *toggle |= 1 << endpoint; 576 else 577 *toggle &= ~(1 << endpoint); 578 } 579 580 /* this function must be called with interrupt disabled */ 581 static void pipe_toggle_save(struct r8a66597 *r8a66597, 582 struct r8a66597_pipe *pipe, 583 struct urb *urb) 584 { 585 if (r8a66597_read(r8a66597, pipe->pipectr) & SQMON) 586 pipe_toggle_set(r8a66597, pipe, urb, 1); 587 else 588 pipe_toggle_set(r8a66597, pipe, urb, 0); 589 } 590 591 /* this function must be called with interrupt disabled */ 592 static void pipe_toggle_restore(struct r8a66597 *r8a66597, 593 struct r8a66597_pipe *pipe, 594 struct urb *urb) 595 { 596 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb); 597 unsigned char endpoint = usb_pipeendpoint(urb->pipe); 598 unsigned short *toggle = get_toggle_pointer(dev, urb->pipe); 599 600 if (!toggle) 601 return; 602 603 r8a66597_pipe_toggle(r8a66597, pipe, *toggle & (1 << endpoint)); 604 } 605 606 /* this function must be called with interrupt disabled */ 607 static void pipe_buffer_setting(struct r8a66597 *r8a66597, 608 struct r8a66597_pipe_info *info) 609 { 610 u16 val = 0; 611 612 if (info->pipenum == 0) 613 return; 614 615 r8a66597_bset(r8a66597, ACLRM, get_pipectr_addr(info->pipenum)); 616 r8a66597_bclr(r8a66597, ACLRM, get_pipectr_addr(info->pipenum)); 617 r8a66597_write(r8a66597, info->pipenum, PIPESEL); 618 if (!info->dir_in) 619 val |= R8A66597_DIR; 620 if (info->type == R8A66597_BULK && info->dir_in) 621 val |= R8A66597_DBLB | R8A66597_SHTNAK; 622 val |= info->type | info->epnum; 623 r8a66597_write(r8a66597, val, PIPECFG); 624 625 r8a66597_write(r8a66597, (info->buf_bsize << 10) | (info->bufnum), 626 PIPEBUF); 627 r8a66597_write(r8a66597, make_devsel(info->address) | info->maxpacket, 628 PIPEMAXP); 629 r8a66597_write(r8a66597, info->interval, PIPEPERI); 630 } 631 632 /* this function must be called with interrupt disabled */ 633 static void pipe_setting(struct r8a66597 *r8a66597, struct r8a66597_td *td) 634 { 635 struct r8a66597_pipe_info *info; 636 struct urb *urb = td->urb; 637 638 if (td->pipenum > 0) { 639 info = &td->pipe->info; 640 cfifo_change(r8a66597, 0); 641 pipe_buffer_setting(r8a66597, info); 642 643 if (!usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), 644 usb_pipeout(urb->pipe)) && 645 !usb_pipecontrol(urb->pipe)) { 646 r8a66597_pipe_toggle(r8a66597, td->pipe, 0); 647 pipe_toggle_set(r8a66597, td->pipe, urb, 0); 648 clear_all_buffer(r8a66597, td->pipe); 649 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), 650 usb_pipeout(urb->pipe), 1); 651 } 652 pipe_toggle_restore(r8a66597, td->pipe, urb); 653 } 654 } 655 656 /* this function must be called with interrupt disabled */ 657 static u16 get_empty_pipenum(struct r8a66597 *r8a66597, 658 struct usb_endpoint_descriptor *ep) 659 { 660 u16 array[R8A66597_MAX_NUM_PIPE], i = 0, min; 661 662 memset(array, 0, sizeof(array)); 663 switch (usb_endpoint_type(ep)) { 664 case USB_ENDPOINT_XFER_BULK: 665 if (usb_endpoint_dir_in(ep)) 666 array[i++] = 4; 667 else { 668 array[i++] = 3; 669 array[i++] = 5; 670 } 671 break; 672 case USB_ENDPOINT_XFER_INT: 673 if (usb_endpoint_dir_in(ep)) { 674 array[i++] = 6; 675 array[i++] = 7; 676 array[i++] = 8; 677 } else 678 array[i++] = 9; 679 break; 680 case USB_ENDPOINT_XFER_ISOC: 681 if (usb_endpoint_dir_in(ep)) 682 array[i++] = 2; 683 else 684 array[i++] = 1; 685 break; 686 default: 687 printk(KERN_ERR "r8a66597: Illegal type\n"); 688 return 0; 689 } 690 691 i = 1; 692 min = array[0]; 693 while (array[i] != 0) { 694 if (r8a66597->pipe_cnt[min] > r8a66597->pipe_cnt[array[i]]) 695 min = array[i]; 696 i++; 697 } 698 699 return min; 700 } 701 702 static u16 get_r8a66597_type(__u8 type) 703 { 704 u16 r8a66597_type; 705 706 switch (type) { 707 case USB_ENDPOINT_XFER_BULK: 708 r8a66597_type = R8A66597_BULK; 709 break; 710 case USB_ENDPOINT_XFER_INT: 711 r8a66597_type = R8A66597_INT; 712 break; 713 case USB_ENDPOINT_XFER_ISOC: 714 r8a66597_type = R8A66597_ISO; 715 break; 716 default: 717 printk(KERN_ERR "r8a66597: Illegal type\n"); 718 r8a66597_type = 0x0000; 719 break; 720 } 721 722 return r8a66597_type; 723 } 724 725 static u16 get_bufnum(u16 pipenum) 726 { 727 u16 bufnum = 0; 728 729 if (pipenum == 0) 730 bufnum = 0; 731 else if (check_bulk_or_isoc(pipenum)) 732 bufnum = 8 + (pipenum - 1) * R8A66597_BUF_BSIZE*2; 733 else if (check_interrupt(pipenum)) 734 bufnum = 4 + (pipenum - 6); 735 else 736 printk(KERN_ERR "r8a66597: Illegal pipenum (%d)\n", pipenum); 737 738 return bufnum; 739 } 740 741 static u16 get_buf_bsize(u16 pipenum) 742 { 743 u16 buf_bsize = 0; 744 745 if (pipenum == 0) 746 buf_bsize = 3; 747 else if (check_bulk_or_isoc(pipenum)) 748 buf_bsize = R8A66597_BUF_BSIZE - 1; 749 else if (check_interrupt(pipenum)) 750 buf_bsize = 0; 751 else 752 printk(KERN_ERR "r8a66597: Illegal pipenum (%d)\n", pipenum); 753 754 return buf_bsize; 755 } 756 757 /* this function must be called with interrupt disabled */ 758 static void enable_r8a66597_pipe_dma(struct r8a66597 *r8a66597, 759 struct r8a66597_device *dev, 760 struct r8a66597_pipe *pipe, 761 struct urb *urb) 762 { 763 #if !defined(CONFIG_SUPERH_ON_CHIP_R8A66597) 764 int i; 765 struct r8a66597_pipe_info *info = &pipe->info; 766 767 if ((pipe->info.pipenum != 0) && (info->type != R8A66597_INT)) { 768 for (i = 0; i < R8A66597_MAX_DMA_CHANNEL; i++) { 769 if ((r8a66597->dma_map & (1 << i)) != 0) 770 continue; 771 772 dev_info(&dev->udev->dev, 773 "address %d, EndpointAddress 0x%02x use " 774 "DMA FIFO\n", usb_pipedevice(urb->pipe), 775 info->dir_in ? 776 USB_ENDPOINT_DIR_MASK + info->epnum 777 : info->epnum); 778 779 r8a66597->dma_map |= 1 << i; 780 dev->dma_map |= 1 << i; 781 set_pipe_reg_addr(pipe, i); 782 783 cfifo_change(r8a66597, 0); 784 r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum, 785 MBW | CURPIPE, pipe->fifosel); 786 787 r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE, 788 pipe->info.pipenum); 789 r8a66597_bset(r8a66597, BCLR, pipe->fifoctr); 790 break; 791 } 792 } 793 #endif /* #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) */ 794 } 795 796 /* this function must be called with interrupt disabled */ 797 static void enable_r8a66597_pipe(struct r8a66597 *r8a66597, struct urb *urb, 798 struct usb_host_endpoint *hep, 799 struct r8a66597_pipe_info *info) 800 { 801 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb); 802 struct r8a66597_pipe *pipe = hep->hcpriv; 803 804 dbg("enable_pipe:"); 805 806 pipe->info = *info; 807 set_pipe_reg_addr(pipe, R8A66597_PIPE_NO_DMA); 808 r8a66597->pipe_cnt[pipe->info.pipenum]++; 809 dev->pipe_cnt[pipe->info.pipenum]++; 810 811 enable_r8a66597_pipe_dma(r8a66597, dev, pipe, urb); 812 } 813 814 /* this function must be called with interrupt disabled */ 815 static void force_dequeue(struct r8a66597 *r8a66597, u16 pipenum, u16 address) 816 { 817 struct r8a66597_td *td, *next; 818 struct urb *urb; 819 struct list_head *list = &r8a66597->pipe_queue[pipenum]; 820 821 if (list_empty(list)) 822 return; 823 824 list_for_each_entry_safe(td, next, list, queue) { 825 if (!td) 826 continue; 827 if (td->address != address) 828 continue; 829 830 urb = td->urb; 831 list_del(&td->queue); 832 kfree(td); 833 834 if (urb) { 835 usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), 836 urb); 837 838 spin_unlock(&r8a66597->lock); 839 usb_hcd_giveback_urb(r8a66597_to_hcd(r8a66597), urb, 840 -ENODEV); 841 spin_lock(&r8a66597->lock); 842 } 843 break; 844 } 845 } 846 847 /* this function must be called with interrupt disabled */ 848 static void disable_r8a66597_pipe_all(struct r8a66597 *r8a66597, 849 struct r8a66597_device *dev) 850 { 851 int check_ep0 = 0; 852 u16 pipenum; 853 854 if (!dev) 855 return; 856 857 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) { 858 if (!dev->pipe_cnt[pipenum]) 859 continue; 860 861 if (!check_ep0) { 862 check_ep0 = 1; 863 force_dequeue(r8a66597, 0, dev->address); 864 } 865 866 r8a66597->pipe_cnt[pipenum] -= dev->pipe_cnt[pipenum]; 867 dev->pipe_cnt[pipenum] = 0; 868 force_dequeue(r8a66597, pipenum, dev->address); 869 } 870 871 dbg("disable_pipe"); 872 873 r8a66597->dma_map &= ~(dev->dma_map); 874 dev->dma_map = 0; 875 } 876 877 static u16 get_interval(struct urb *urb, __u8 interval) 878 { 879 u16 time = 1; 880 int i; 881 882 if (urb->dev->speed == USB_SPEED_HIGH) { 883 if (interval > IITV) 884 time = IITV; 885 else 886 time = interval ? interval - 1 : 0; 887 } else { 888 if (interval > 128) { 889 time = IITV; 890 } else { 891 /* calculate the nearest value for PIPEPERI */ 892 for (i = 0; i < 7; i++) { 893 if ((1 << i) < interval && 894 (1 << (i + 1) > interval)) 895 time = 1 << i; 896 } 897 } 898 } 899 900 return time; 901 } 902 903 static unsigned long get_timer_interval(struct urb *urb, __u8 interval) 904 { 905 __u8 i; 906 unsigned long time = 1; 907 908 if (usb_pipeisoc(urb->pipe)) 909 return 0; 910 911 if (get_r8a66597_usb_speed(urb->dev->speed) == HSMODE) { 912 for (i = 0; i < (interval - 1); i++) 913 time *= 2; 914 time = time * 125 / 1000; /* uSOF -> msec */ 915 } else { 916 time = interval; 917 } 918 919 return time; 920 } 921 922 /* this function must be called with interrupt disabled */ 923 static void init_pipe_info(struct r8a66597 *r8a66597, struct urb *urb, 924 struct usb_host_endpoint *hep, 925 struct usb_endpoint_descriptor *ep) 926 { 927 struct r8a66597_pipe_info info; 928 929 info.pipenum = get_empty_pipenum(r8a66597, ep); 930 info.address = get_urb_to_r8a66597_addr(r8a66597, urb); 931 info.epnum = usb_endpoint_num(ep); 932 info.maxpacket = le16_to_cpu(ep->wMaxPacketSize); 933 info.type = get_r8a66597_type(usb_endpoint_type(ep)); 934 info.bufnum = get_bufnum(info.pipenum); 935 info.buf_bsize = get_buf_bsize(info.pipenum); 936 if (info.type == R8A66597_BULK) { 937 info.interval = 0; 938 info.timer_interval = 0; 939 } else { 940 info.interval = get_interval(urb, ep->bInterval); 941 info.timer_interval = get_timer_interval(urb, ep->bInterval); 942 } 943 if (usb_endpoint_dir_in(ep)) 944 info.dir_in = 1; 945 else 946 info.dir_in = 0; 947 948 enable_r8a66597_pipe(r8a66597, urb, hep, &info); 949 } 950 951 static void init_pipe_config(struct r8a66597 *r8a66597, struct urb *urb) 952 { 953 struct r8a66597_device *dev; 954 955 dev = get_urb_to_r8a66597_dev(r8a66597, urb); 956 dev->state = USB_STATE_CONFIGURED; 957 } 958 959 static void pipe_irq_enable(struct r8a66597 *r8a66597, struct urb *urb, 960 u16 pipenum) 961 { 962 if (pipenum == 0 && usb_pipeout(urb->pipe)) 963 enable_irq_empty(r8a66597, pipenum); 964 else 965 enable_irq_ready(r8a66597, pipenum); 966 967 if (!usb_pipeisoc(urb->pipe)) 968 enable_irq_nrdy(r8a66597, pipenum); 969 } 970 971 static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum) 972 { 973 disable_irq_ready(r8a66597, pipenum); 974 disable_irq_nrdy(r8a66597, pipenum); 975 } 976 977 static void r8a66597_root_hub_start_polling(struct r8a66597 *r8a66597) 978 { 979 mod_timer(&r8a66597->rh_timer, 980 jiffies + msecs_to_jiffies(R8A66597_RH_POLL_TIME)); 981 } 982 983 static void start_root_hub_sampling(struct r8a66597 *r8a66597, int port, 984 int connect) 985 { 986 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port]; 987 988 rh->old_syssts = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST; 989 rh->scount = R8A66597_MAX_SAMPLING; 990 if (connect) 991 rh->port |= 1 << USB_PORT_FEAT_CONNECTION; 992 else 993 rh->port &= ~(1 << USB_PORT_FEAT_CONNECTION); 994 rh->port |= 1 << USB_PORT_FEAT_C_CONNECTION; 995 996 r8a66597_root_hub_start_polling(r8a66597); 997 } 998 999 /* this function must be called with interrupt disabled */ 1000 static void r8a66597_check_syssts(struct r8a66597 *r8a66597, int port, 1001 u16 syssts) 1002 { 1003 if (syssts == SE0) { 1004 r8a66597_write(r8a66597, ~ATTCH, get_intsts_reg(port)); 1005 r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port)); 1006 return; 1007 } 1008 1009 if (syssts == FS_JSTS) 1010 r8a66597_bset(r8a66597, HSE, get_syscfg_reg(port)); 1011 else if (syssts == LS_JSTS) 1012 r8a66597_bclr(r8a66597, HSE, get_syscfg_reg(port)); 1013 1014 r8a66597_write(r8a66597, ~DTCH, get_intsts_reg(port)); 1015 r8a66597_bset(r8a66597, DTCHE, get_intenb_reg(port)); 1016 1017 if (r8a66597->bus_suspended) 1018 usb_hcd_resume_root_hub(r8a66597_to_hcd(r8a66597)); 1019 } 1020 1021 /* this function must be called with interrupt disabled */ 1022 static void r8a66597_usb_connect(struct r8a66597 *r8a66597, int port) 1023 { 1024 u16 speed = get_rh_usb_speed(r8a66597, port); 1025 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port]; 1026 1027 if (speed == HSMODE) 1028 rh->port |= (1 << USB_PORT_FEAT_HIGHSPEED); 1029 else if (speed == LSMODE) 1030 rh->port |= (1 << USB_PORT_FEAT_LOWSPEED); 1031 1032 rh->port &= ~(1 << USB_PORT_FEAT_RESET); 1033 rh->port |= 1 << USB_PORT_FEAT_ENABLE; 1034 } 1035 1036 /* this function must be called with interrupt disabled */ 1037 static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597, int port) 1038 { 1039 struct r8a66597_device *dev = r8a66597->root_hub[port].dev; 1040 1041 disable_r8a66597_pipe_all(r8a66597, dev); 1042 free_usb_address(r8a66597, dev); 1043 1044 start_root_hub_sampling(r8a66597, port, 0); 1045 } 1046 1047 /* this function must be called with interrupt disabled */ 1048 static void prepare_setup_packet(struct r8a66597 *r8a66597, 1049 struct r8a66597_td *td) 1050 { 1051 int i; 1052 __le16 *p = (__le16 *)td->urb->setup_packet; 1053 unsigned long setup_addr = USBREQ; 1054 1055 r8a66597_write(r8a66597, make_devsel(td->address) | td->maxpacket, 1056 DCPMAXP); 1057 r8a66597_write(r8a66597, ~(SIGN | SACK), INTSTS1); 1058 1059 for (i = 0; i < 4; i++) { 1060 r8a66597_write(r8a66597, le16_to_cpu(p[i]), setup_addr); 1061 setup_addr += 2; 1062 } 1063 r8a66597_write(r8a66597, SUREQ, DCPCTR); 1064 } 1065 1066 /* this function must be called with interrupt disabled */ 1067 static void prepare_packet_read(struct r8a66597 *r8a66597, 1068 struct r8a66597_td *td) 1069 { 1070 struct urb *urb = td->urb; 1071 1072 if (usb_pipecontrol(urb->pipe)) { 1073 r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG); 1074 r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL); 1075 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0); 1076 if (urb->actual_length == 0) { 1077 r8a66597_pipe_toggle(r8a66597, td->pipe, 1); 1078 r8a66597_write(r8a66597, BCLR, CFIFOCTR); 1079 } 1080 pipe_irq_disable(r8a66597, td->pipenum); 1081 pipe_start(r8a66597, td->pipe); 1082 pipe_irq_enable(r8a66597, urb, td->pipenum); 1083 } else { 1084 if (urb->actual_length == 0) { 1085 pipe_irq_disable(r8a66597, td->pipenum); 1086 pipe_setting(r8a66597, td); 1087 pipe_stop(r8a66597, td->pipe); 1088 r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS); 1089 1090 if (td->pipe->pipetre) { 1091 r8a66597_write(r8a66597, TRCLR, 1092 td->pipe->pipetre); 1093 r8a66597_write(r8a66597, 1094 DIV_ROUND_UP 1095 (urb->transfer_buffer_length, 1096 td->maxpacket), 1097 td->pipe->pipetrn); 1098 r8a66597_bset(r8a66597, TRENB, 1099 td->pipe->pipetre); 1100 } 1101 1102 pipe_start(r8a66597, td->pipe); 1103 pipe_irq_enable(r8a66597, urb, td->pipenum); 1104 } 1105 } 1106 } 1107 1108 /* this function must be called with interrupt disabled */ 1109 static void prepare_packet_write(struct r8a66597 *r8a66597, 1110 struct r8a66597_td *td) 1111 { 1112 u16 tmp; 1113 struct urb *urb = td->urb; 1114 1115 if (usb_pipecontrol(urb->pipe)) { 1116 pipe_stop(r8a66597, td->pipe); 1117 r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG); 1118 r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL); 1119 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0); 1120 if (urb->actual_length == 0) { 1121 r8a66597_pipe_toggle(r8a66597, td->pipe, 1); 1122 r8a66597_write(r8a66597, BCLR, CFIFOCTR); 1123 } 1124 } else { 1125 if (urb->actual_length == 0) 1126 pipe_setting(r8a66597, td); 1127 if (td->pipe->pipetre) 1128 r8a66597_bclr(r8a66597, TRENB, td->pipe->pipetre); 1129 } 1130 r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS); 1131 1132 fifo_change_from_pipe(r8a66597, td->pipe); 1133 tmp = r8a66597_read(r8a66597, td->pipe->fifoctr); 1134 if (unlikely((tmp & FRDY) == 0)) 1135 pipe_irq_enable(r8a66597, urb, td->pipenum); 1136 else 1137 packet_write(r8a66597, td->pipenum); 1138 pipe_start(r8a66597, td->pipe); 1139 } 1140 1141 /* this function must be called with interrupt disabled */ 1142 static void prepare_status_packet(struct r8a66597 *r8a66597, 1143 struct r8a66597_td *td) 1144 { 1145 struct urb *urb = td->urb; 1146 1147 r8a66597_pipe_toggle(r8a66597, td->pipe, 1); 1148 pipe_stop(r8a66597, td->pipe); 1149 1150 if (urb->setup_packet[0] & USB_ENDPOINT_DIR_MASK) { 1151 r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG); 1152 r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL); 1153 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0); 1154 r8a66597_write(r8a66597, ~BEMP0, BEMPSTS); 1155 r8a66597_write(r8a66597, BCLR | BVAL, CFIFOCTR); 1156 enable_irq_empty(r8a66597, 0); 1157 } else { 1158 r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG); 1159 r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL); 1160 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0); 1161 r8a66597_write(r8a66597, BCLR, CFIFOCTR); 1162 enable_irq_ready(r8a66597, 0); 1163 } 1164 enable_irq_nrdy(r8a66597, 0); 1165 pipe_start(r8a66597, td->pipe); 1166 } 1167 1168 static int is_set_address(unsigned char *setup_packet) 1169 { 1170 if (((setup_packet[0] & USB_TYPE_MASK) == USB_TYPE_STANDARD) && 1171 setup_packet[1] == USB_REQ_SET_ADDRESS) 1172 return 1; 1173 else 1174 return 0; 1175 } 1176 1177 /* this function must be called with interrupt disabled */ 1178 static int start_transfer(struct r8a66597 *r8a66597, struct r8a66597_td *td) 1179 { 1180 BUG_ON(!td); 1181 1182 switch (td->type) { 1183 case USB_PID_SETUP: 1184 if (is_set_address(td->urb->setup_packet)) { 1185 td->set_address = 1; 1186 td->urb->setup_packet[2] = alloc_usb_address(r8a66597, 1187 td->urb); 1188 if (td->urb->setup_packet[2] == 0) 1189 return -EPIPE; 1190 } 1191 prepare_setup_packet(r8a66597, td); 1192 break; 1193 case USB_PID_IN: 1194 prepare_packet_read(r8a66597, td); 1195 break; 1196 case USB_PID_OUT: 1197 prepare_packet_write(r8a66597, td); 1198 break; 1199 case USB_PID_ACK: 1200 prepare_status_packet(r8a66597, td); 1201 break; 1202 default: 1203 printk(KERN_ERR "r8a66597: invalid type.\n"); 1204 break; 1205 } 1206 1207 return 0; 1208 } 1209 1210 static int check_transfer_finish(struct r8a66597_td *td, struct urb *urb) 1211 { 1212 if (usb_pipeisoc(urb->pipe)) { 1213 if (urb->number_of_packets == td->iso_cnt) 1214 return 1; 1215 } 1216 1217 /* control or bulk or interrupt */ 1218 if ((urb->transfer_buffer_length <= urb->actual_length) || 1219 (td->short_packet) || (td->zero_packet)) 1220 return 1; 1221 1222 return 0; 1223 } 1224 1225 /* this function must be called with interrupt disabled */ 1226 static void set_td_timer(struct r8a66597 *r8a66597, struct r8a66597_td *td) 1227 { 1228 unsigned long time; 1229 1230 BUG_ON(!td); 1231 1232 if (!list_empty(&r8a66597->pipe_queue[td->pipenum]) && 1233 !usb_pipecontrol(td->urb->pipe) && usb_pipein(td->urb->pipe)) { 1234 r8a66597->timeout_map |= 1 << td->pipenum; 1235 switch (usb_pipetype(td->urb->pipe)) { 1236 case PIPE_INTERRUPT: 1237 case PIPE_ISOCHRONOUS: 1238 time = 30; 1239 break; 1240 default: 1241 time = 300; 1242 break; 1243 } 1244 1245 mod_timer(&r8a66597->td_timer[td->pipenum], 1246 jiffies + msecs_to_jiffies(time)); 1247 } 1248 } 1249 1250 /* this function must be called with interrupt disabled */ 1251 static void finish_request(struct r8a66597 *r8a66597, struct r8a66597_td *td, 1252 u16 pipenum, struct urb *urb, int status) 1253 __releases(r8a66597->lock) __acquires(r8a66597->lock) 1254 { 1255 int restart = 0; 1256 struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597); 1257 1258 r8a66597->timeout_map &= ~(1 << pipenum); 1259 1260 if (likely(td)) { 1261 if (td->set_address && (status != 0 || urb->unlinked)) 1262 r8a66597->address_map &= ~(1 << urb->setup_packet[2]); 1263 1264 pipe_toggle_save(r8a66597, td->pipe, urb); 1265 list_del(&td->queue); 1266 kfree(td); 1267 } 1268 1269 if (!list_empty(&r8a66597->pipe_queue[pipenum])) 1270 restart = 1; 1271 1272 if (likely(urb)) { 1273 if (usb_pipeisoc(urb->pipe)) 1274 urb->start_frame = r8a66597_get_frame(hcd); 1275 1276 usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), urb); 1277 spin_unlock(&r8a66597->lock); 1278 usb_hcd_giveback_urb(hcd, urb, status); 1279 spin_lock(&r8a66597->lock); 1280 } 1281 1282 if (restart) { 1283 td = r8a66597_get_td(r8a66597, pipenum); 1284 if (unlikely(!td)) 1285 return; 1286 1287 start_transfer(r8a66597, td); 1288 set_td_timer(r8a66597, td); 1289 } 1290 } 1291 1292 static void packet_read(struct r8a66597 *r8a66597, u16 pipenum) 1293 { 1294 u16 tmp; 1295 int rcv_len, bufsize, urb_len, size; 1296 u16 *buf; 1297 struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum); 1298 struct urb *urb; 1299 int finish = 0; 1300 int status = 0; 1301 1302 if (unlikely(!td)) 1303 return; 1304 urb = td->urb; 1305 1306 fifo_change_from_pipe(r8a66597, td->pipe); 1307 tmp = r8a66597_read(r8a66597, td->pipe->fifoctr); 1308 if (unlikely((tmp & FRDY) == 0)) { 1309 pipe_stop(r8a66597, td->pipe); 1310 pipe_irq_disable(r8a66597, pipenum); 1311 printk(KERN_ERR "r8a66597: in fifo not ready (%d)\n", pipenum); 1312 finish_request(r8a66597, td, pipenum, td->urb, -EPIPE); 1313 return; 1314 } 1315 1316 /* prepare parameters */ 1317 rcv_len = tmp & DTLN; 1318 if (usb_pipeisoc(urb->pipe)) { 1319 buf = (u16 *)(urb->transfer_buffer + 1320 urb->iso_frame_desc[td->iso_cnt].offset); 1321 urb_len = urb->iso_frame_desc[td->iso_cnt].length; 1322 } else { 1323 buf = (void *)urb->transfer_buffer + urb->actual_length; 1324 urb_len = urb->transfer_buffer_length - urb->actual_length; 1325 } 1326 bufsize = min(urb_len, (int) td->maxpacket); 1327 if (rcv_len <= bufsize) { 1328 size = rcv_len; 1329 } else { 1330 size = bufsize; 1331 status = -EOVERFLOW; 1332 finish = 1; 1333 } 1334 1335 /* update parameters */ 1336 urb->actual_length += size; 1337 if (rcv_len == 0) 1338 td->zero_packet = 1; 1339 if (rcv_len < bufsize) { 1340 td->short_packet = 1; 1341 } 1342 if (usb_pipeisoc(urb->pipe)) { 1343 urb->iso_frame_desc[td->iso_cnt].actual_length = size; 1344 urb->iso_frame_desc[td->iso_cnt].status = status; 1345 td->iso_cnt++; 1346 finish = 0; 1347 } 1348 1349 /* check transfer finish */ 1350 if (finish || check_transfer_finish(td, urb)) { 1351 pipe_stop(r8a66597, td->pipe); 1352 pipe_irq_disable(r8a66597, pipenum); 1353 finish = 1; 1354 } 1355 1356 /* read fifo */ 1357 if (urb->transfer_buffer) { 1358 if (size == 0) 1359 r8a66597_write(r8a66597, BCLR, td->pipe->fifoctr); 1360 else 1361 r8a66597_read_fifo(r8a66597, td->pipe->fifoaddr, 1362 buf, size); 1363 } 1364 1365 if (finish && pipenum != 0) 1366 finish_request(r8a66597, td, pipenum, urb, status); 1367 } 1368 1369 static void packet_write(struct r8a66597 *r8a66597, u16 pipenum) 1370 { 1371 u16 tmp; 1372 int bufsize, size; 1373 u16 *buf; 1374 struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum); 1375 struct urb *urb; 1376 1377 if (unlikely(!td)) 1378 return; 1379 urb = td->urb; 1380 1381 fifo_change_from_pipe(r8a66597, td->pipe); 1382 tmp = r8a66597_read(r8a66597, td->pipe->fifoctr); 1383 if (unlikely((tmp & FRDY) == 0)) { 1384 pipe_stop(r8a66597, td->pipe); 1385 pipe_irq_disable(r8a66597, pipenum); 1386 printk(KERN_ERR "r8a66597: out fifo not ready (%d)\n", pipenum); 1387 finish_request(r8a66597, td, pipenum, urb, -EPIPE); 1388 return; 1389 } 1390 1391 /* prepare parameters */ 1392 bufsize = td->maxpacket; 1393 if (usb_pipeisoc(urb->pipe)) { 1394 buf = (u16 *)(urb->transfer_buffer + 1395 urb->iso_frame_desc[td->iso_cnt].offset); 1396 size = min(bufsize, 1397 (int)urb->iso_frame_desc[td->iso_cnt].length); 1398 } else { 1399 buf = (u16 *)(urb->transfer_buffer + urb->actual_length); 1400 size = min_t(u32, bufsize, 1401 urb->transfer_buffer_length - urb->actual_length); 1402 } 1403 1404 /* write fifo */ 1405 if (pipenum > 0) 1406 r8a66597_write(r8a66597, ~(1 << pipenum), BEMPSTS); 1407 if (urb->transfer_buffer) { 1408 r8a66597_write_fifo(r8a66597, td->pipe->fifoaddr, buf, size); 1409 if (!usb_pipebulk(urb->pipe) || td->maxpacket != size) 1410 r8a66597_write(r8a66597, BVAL, td->pipe->fifoctr); 1411 } 1412 1413 /* update parameters */ 1414 urb->actual_length += size; 1415 if (usb_pipeisoc(urb->pipe)) { 1416 urb->iso_frame_desc[td->iso_cnt].actual_length = size; 1417 urb->iso_frame_desc[td->iso_cnt].status = 0; 1418 td->iso_cnt++; 1419 } 1420 1421 /* check transfer finish */ 1422 if (check_transfer_finish(td, urb)) { 1423 disable_irq_ready(r8a66597, pipenum); 1424 enable_irq_empty(r8a66597, pipenum); 1425 if (!usb_pipeisoc(urb->pipe)) 1426 enable_irq_nrdy(r8a66597, pipenum); 1427 } else 1428 pipe_irq_enable(r8a66597, urb, pipenum); 1429 } 1430 1431 1432 static void check_next_phase(struct r8a66597 *r8a66597, int status) 1433 { 1434 struct r8a66597_td *td = r8a66597_get_td(r8a66597, 0); 1435 struct urb *urb; 1436 u8 finish = 0; 1437 1438 if (unlikely(!td)) 1439 return; 1440 urb = td->urb; 1441 1442 switch (td->type) { 1443 case USB_PID_IN: 1444 case USB_PID_OUT: 1445 if (check_transfer_finish(td, urb)) 1446 td->type = USB_PID_ACK; 1447 break; 1448 case USB_PID_SETUP: 1449 if (urb->transfer_buffer_length == urb->actual_length) 1450 td->type = USB_PID_ACK; 1451 else if (usb_pipeout(urb->pipe)) 1452 td->type = USB_PID_OUT; 1453 else 1454 td->type = USB_PID_IN; 1455 break; 1456 case USB_PID_ACK: 1457 finish = 1; 1458 break; 1459 } 1460 1461 if (finish || status != 0 || urb->unlinked) 1462 finish_request(r8a66597, td, 0, urb, status); 1463 else 1464 start_transfer(r8a66597, td); 1465 } 1466 1467 static int get_urb_error(struct r8a66597 *r8a66597, u16 pipenum) 1468 { 1469 struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum); 1470 1471 if (td) { 1472 u16 pid = r8a66597_read(r8a66597, td->pipe->pipectr) & PID; 1473 1474 if (pid == PID_NAK) 1475 return -ECONNRESET; 1476 else 1477 return -EPIPE; 1478 } 1479 return 0; 1480 } 1481 1482 static void irq_pipe_ready(struct r8a66597 *r8a66597) 1483 { 1484 u16 check; 1485 u16 pipenum; 1486 u16 mask; 1487 struct r8a66597_td *td; 1488 1489 mask = r8a66597_read(r8a66597, BRDYSTS) 1490 & r8a66597_read(r8a66597, BRDYENB); 1491 r8a66597_write(r8a66597, ~mask, BRDYSTS); 1492 if (mask & BRDY0) { 1493 td = r8a66597_get_td(r8a66597, 0); 1494 if (td && td->type == USB_PID_IN) 1495 packet_read(r8a66597, 0); 1496 else 1497 pipe_irq_disable(r8a66597, 0); 1498 check_next_phase(r8a66597, 0); 1499 } 1500 1501 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) { 1502 check = 1 << pipenum; 1503 if (mask & check) { 1504 td = r8a66597_get_td(r8a66597, pipenum); 1505 if (unlikely(!td)) 1506 continue; 1507 1508 if (td->type == USB_PID_IN) 1509 packet_read(r8a66597, pipenum); 1510 else if (td->type == USB_PID_OUT) 1511 packet_write(r8a66597, pipenum); 1512 } 1513 } 1514 } 1515 1516 static void irq_pipe_empty(struct r8a66597 *r8a66597) 1517 { 1518 u16 tmp; 1519 u16 check; 1520 u16 pipenum; 1521 u16 mask; 1522 struct r8a66597_td *td; 1523 1524 mask = r8a66597_read(r8a66597, BEMPSTS) 1525 & r8a66597_read(r8a66597, BEMPENB); 1526 r8a66597_write(r8a66597, ~mask, BEMPSTS); 1527 if (mask & BEMP0) { 1528 cfifo_change(r8a66597, 0); 1529 td = r8a66597_get_td(r8a66597, 0); 1530 if (td && td->type != USB_PID_OUT) 1531 disable_irq_empty(r8a66597, 0); 1532 check_next_phase(r8a66597, 0); 1533 } 1534 1535 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) { 1536 check = 1 << pipenum; 1537 if (mask & check) { 1538 struct r8a66597_td *td; 1539 td = r8a66597_get_td(r8a66597, pipenum); 1540 if (unlikely(!td)) 1541 continue; 1542 1543 tmp = r8a66597_read(r8a66597, td->pipe->pipectr); 1544 if ((tmp & INBUFM) == 0) { 1545 disable_irq_empty(r8a66597, pipenum); 1546 pipe_irq_disable(r8a66597, pipenum); 1547 finish_request(r8a66597, td, pipenum, td->urb, 1548 0); 1549 } 1550 } 1551 } 1552 } 1553 1554 static void irq_pipe_nrdy(struct r8a66597 *r8a66597) 1555 { 1556 u16 check; 1557 u16 pipenum; 1558 u16 mask; 1559 int status; 1560 1561 mask = r8a66597_read(r8a66597, NRDYSTS) 1562 & r8a66597_read(r8a66597, NRDYENB); 1563 r8a66597_write(r8a66597, ~mask, NRDYSTS); 1564 if (mask & NRDY0) { 1565 cfifo_change(r8a66597, 0); 1566 status = get_urb_error(r8a66597, 0); 1567 pipe_irq_disable(r8a66597, 0); 1568 check_next_phase(r8a66597, status); 1569 } 1570 1571 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) { 1572 check = 1 << pipenum; 1573 if (mask & check) { 1574 struct r8a66597_td *td; 1575 td = r8a66597_get_td(r8a66597, pipenum); 1576 if (unlikely(!td)) 1577 continue; 1578 1579 status = get_urb_error(r8a66597, pipenum); 1580 pipe_irq_disable(r8a66597, pipenum); 1581 pipe_stop(r8a66597, td->pipe); 1582 finish_request(r8a66597, td, pipenum, td->urb, status); 1583 } 1584 } 1585 } 1586 1587 static irqreturn_t r8a66597_irq(struct usb_hcd *hcd) 1588 { 1589 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd); 1590 u16 intsts0, intsts1, intsts2; 1591 u16 intenb0, intenb1, intenb2; 1592 u16 mask0, mask1, mask2; 1593 int status; 1594 1595 spin_lock(&r8a66597->lock); 1596 1597 intsts0 = r8a66597_read(r8a66597, INTSTS0); 1598 intsts1 = r8a66597_read(r8a66597, INTSTS1); 1599 intsts2 = r8a66597_read(r8a66597, INTSTS2); 1600 intenb0 = r8a66597_read(r8a66597, INTENB0); 1601 intenb1 = r8a66597_read(r8a66597, INTENB1); 1602 intenb2 = r8a66597_read(r8a66597, INTENB2); 1603 1604 mask2 = intsts2 & intenb2; 1605 mask1 = intsts1 & intenb1; 1606 mask0 = intsts0 & intenb0 & (BEMP | NRDY | BRDY); 1607 if (mask2) { 1608 if (mask2 & ATTCH) { 1609 r8a66597_write(r8a66597, ~ATTCH, INTSTS2); 1610 r8a66597_bclr(r8a66597, ATTCHE, INTENB2); 1611 1612 /* start usb bus sampling */ 1613 start_root_hub_sampling(r8a66597, 1, 1); 1614 } 1615 if (mask2 & DTCH) { 1616 r8a66597_write(r8a66597, ~DTCH, INTSTS2); 1617 r8a66597_bclr(r8a66597, DTCHE, INTENB2); 1618 r8a66597_usb_disconnect(r8a66597, 1); 1619 } 1620 if (mask2 & BCHG) { 1621 r8a66597_write(r8a66597, ~BCHG, INTSTS2); 1622 r8a66597_bclr(r8a66597, BCHGE, INTENB2); 1623 usb_hcd_resume_root_hub(r8a66597_to_hcd(r8a66597)); 1624 } 1625 } 1626 1627 if (mask1) { 1628 if (mask1 & ATTCH) { 1629 r8a66597_write(r8a66597, ~ATTCH, INTSTS1); 1630 r8a66597_bclr(r8a66597, ATTCHE, INTENB1); 1631 1632 /* start usb bus sampling */ 1633 start_root_hub_sampling(r8a66597, 0, 1); 1634 } 1635 if (mask1 & DTCH) { 1636 r8a66597_write(r8a66597, ~DTCH, INTSTS1); 1637 r8a66597_bclr(r8a66597, DTCHE, INTENB1); 1638 r8a66597_usb_disconnect(r8a66597, 0); 1639 } 1640 if (mask1 & BCHG) { 1641 r8a66597_write(r8a66597, ~BCHG, INTSTS1); 1642 r8a66597_bclr(r8a66597, BCHGE, INTENB1); 1643 usb_hcd_resume_root_hub(r8a66597_to_hcd(r8a66597)); 1644 } 1645 1646 if (mask1 & SIGN) { 1647 r8a66597_write(r8a66597, ~SIGN, INTSTS1); 1648 status = get_urb_error(r8a66597, 0); 1649 check_next_phase(r8a66597, status); 1650 } 1651 if (mask1 & SACK) { 1652 r8a66597_write(r8a66597, ~SACK, INTSTS1); 1653 check_next_phase(r8a66597, 0); 1654 } 1655 } 1656 if (mask0) { 1657 if (mask0 & BRDY) 1658 irq_pipe_ready(r8a66597); 1659 if (mask0 & BEMP) 1660 irq_pipe_empty(r8a66597); 1661 if (mask0 & NRDY) 1662 irq_pipe_nrdy(r8a66597); 1663 } 1664 1665 spin_unlock(&r8a66597->lock); 1666 return IRQ_HANDLED; 1667 } 1668 1669 /* this function must be called with interrupt disabled */ 1670 static void r8a66597_root_hub_control(struct r8a66597 *r8a66597, int port) 1671 { 1672 u16 tmp; 1673 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port]; 1674 1675 if (rh->port & (1 << USB_PORT_FEAT_RESET)) { 1676 unsigned long dvstctr_reg = get_dvstctr_reg(port); 1677 1678 tmp = r8a66597_read(r8a66597, dvstctr_reg); 1679 if ((tmp & USBRST) == USBRST) { 1680 r8a66597_mdfy(r8a66597, UACT, USBRST | UACT, 1681 dvstctr_reg); 1682 r8a66597_root_hub_start_polling(r8a66597); 1683 } else 1684 r8a66597_usb_connect(r8a66597, port); 1685 } 1686 1687 if (!(rh->port & (1 << USB_PORT_FEAT_CONNECTION))) { 1688 r8a66597_write(r8a66597, ~ATTCH, get_intsts_reg(port)); 1689 r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port)); 1690 } 1691 1692 if (rh->scount > 0) { 1693 tmp = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST; 1694 if (tmp == rh->old_syssts) { 1695 rh->scount--; 1696 if (rh->scount == 0) 1697 r8a66597_check_syssts(r8a66597, port, tmp); 1698 else 1699 r8a66597_root_hub_start_polling(r8a66597); 1700 } else { 1701 rh->scount = R8A66597_MAX_SAMPLING; 1702 rh->old_syssts = tmp; 1703 r8a66597_root_hub_start_polling(r8a66597); 1704 } 1705 } 1706 } 1707 1708 static void r8a66597_interval_timer(unsigned long _r8a66597) 1709 { 1710 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597; 1711 unsigned long flags; 1712 u16 pipenum; 1713 struct r8a66597_td *td; 1714 1715 spin_lock_irqsave(&r8a66597->lock, flags); 1716 1717 for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) { 1718 if (!(r8a66597->interval_map & (1 << pipenum))) 1719 continue; 1720 if (timer_pending(&r8a66597->interval_timer[pipenum])) 1721 continue; 1722 1723 td = r8a66597_get_td(r8a66597, pipenum); 1724 if (td) 1725 start_transfer(r8a66597, td); 1726 } 1727 1728 spin_unlock_irqrestore(&r8a66597->lock, flags); 1729 } 1730 1731 static void r8a66597_td_timer(unsigned long _r8a66597) 1732 { 1733 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597; 1734 unsigned long flags; 1735 u16 pipenum; 1736 struct r8a66597_td *td, *new_td = NULL; 1737 struct r8a66597_pipe *pipe; 1738 1739 spin_lock_irqsave(&r8a66597->lock, flags); 1740 for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) { 1741 if (!(r8a66597->timeout_map & (1 << pipenum))) 1742 continue; 1743 if (timer_pending(&r8a66597->td_timer[pipenum])) 1744 continue; 1745 1746 td = r8a66597_get_td(r8a66597, pipenum); 1747 if (!td) { 1748 r8a66597->timeout_map &= ~(1 << pipenum); 1749 continue; 1750 } 1751 1752 if (td->urb->actual_length) { 1753 set_td_timer(r8a66597, td); 1754 break; 1755 } 1756 1757 pipe = td->pipe; 1758 pipe_stop(r8a66597, pipe); 1759 1760 new_td = td; 1761 do { 1762 list_move_tail(&new_td->queue, 1763 &r8a66597->pipe_queue[pipenum]); 1764 new_td = r8a66597_get_td(r8a66597, pipenum); 1765 if (!new_td) { 1766 new_td = td; 1767 break; 1768 } 1769 } while (td != new_td && td->address == new_td->address); 1770 1771 start_transfer(r8a66597, new_td); 1772 1773 if (td == new_td) 1774 r8a66597->timeout_map &= ~(1 << pipenum); 1775 else 1776 set_td_timer(r8a66597, new_td); 1777 break; 1778 } 1779 spin_unlock_irqrestore(&r8a66597->lock, flags); 1780 } 1781 1782 static void r8a66597_timer(unsigned long _r8a66597) 1783 { 1784 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597; 1785 unsigned long flags; 1786 int port; 1787 1788 spin_lock_irqsave(&r8a66597->lock, flags); 1789 1790 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) 1791 r8a66597_root_hub_control(r8a66597, port); 1792 1793 spin_unlock_irqrestore(&r8a66597->lock, flags); 1794 } 1795 1796 static int check_pipe_config(struct r8a66597 *r8a66597, struct urb *urb) 1797 { 1798 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb); 1799 1800 if (dev && dev->address && dev->state != USB_STATE_CONFIGURED && 1801 (urb->dev->state == USB_STATE_CONFIGURED)) 1802 return 1; 1803 else 1804 return 0; 1805 } 1806 1807 static int r8a66597_start(struct usb_hcd *hcd) 1808 { 1809 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd); 1810 1811 hcd->state = HC_STATE_RUNNING; 1812 return enable_controller(r8a66597); 1813 } 1814 1815 static void r8a66597_stop(struct usb_hcd *hcd) 1816 { 1817 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd); 1818 1819 disable_controller(r8a66597); 1820 } 1821 1822 static void set_address_zero(struct r8a66597 *r8a66597, struct urb *urb) 1823 { 1824 unsigned int usb_address = usb_pipedevice(urb->pipe); 1825 u16 root_port, hub_port; 1826 1827 if (usb_address == 0) { 1828 get_port_number(urb->dev->devpath, 1829 &root_port, &hub_port); 1830 set_devadd_reg(r8a66597, 0, 1831 get_r8a66597_usb_speed(urb->dev->speed), 1832 get_parent_r8a66597_address(r8a66597, urb->dev), 1833 hub_port, root_port); 1834 } 1835 } 1836 1837 static struct r8a66597_td *r8a66597_make_td(struct r8a66597 *r8a66597, 1838 struct urb *urb, 1839 struct usb_host_endpoint *hep) 1840 { 1841 struct r8a66597_td *td; 1842 u16 pipenum; 1843 1844 td = kzalloc(sizeof(struct r8a66597_td), GFP_ATOMIC); 1845 if (td == NULL) 1846 return NULL; 1847 1848 pipenum = r8a66597_get_pipenum(urb, hep); 1849 td->pipenum = pipenum; 1850 td->pipe = hep->hcpriv; 1851 td->urb = urb; 1852 td->address = get_urb_to_r8a66597_addr(r8a66597, urb); 1853 td->maxpacket = usb_maxpacket(urb->dev, urb->pipe, 1854 !usb_pipein(urb->pipe)); 1855 if (usb_pipecontrol(urb->pipe)) 1856 td->type = USB_PID_SETUP; 1857 else if (usb_pipein(urb->pipe)) 1858 td->type = USB_PID_IN; 1859 else 1860 td->type = USB_PID_OUT; 1861 INIT_LIST_HEAD(&td->queue); 1862 1863 return td; 1864 } 1865 1866 static int r8a66597_urb_enqueue(struct usb_hcd *hcd, 1867 struct urb *urb, 1868 gfp_t mem_flags) 1869 { 1870 struct usb_host_endpoint *hep = urb->ep; 1871 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd); 1872 struct r8a66597_td *td = NULL; 1873 int ret, request = 0; 1874 unsigned long flags; 1875 1876 spin_lock_irqsave(&r8a66597->lock, flags); 1877 if (!get_urb_to_r8a66597_dev(r8a66597, urb)) { 1878 ret = -ENODEV; 1879 goto error_not_linked; 1880 } 1881 1882 ret = usb_hcd_link_urb_to_ep(hcd, urb); 1883 if (ret) 1884 goto error_not_linked; 1885 1886 if (!hep->hcpriv) { 1887 hep->hcpriv = kzalloc(sizeof(struct r8a66597_pipe), 1888 GFP_ATOMIC); 1889 if (!hep->hcpriv) { 1890 ret = -ENOMEM; 1891 goto error; 1892 } 1893 set_pipe_reg_addr(hep->hcpriv, R8A66597_PIPE_NO_DMA); 1894 if (usb_pipeendpoint(urb->pipe)) 1895 init_pipe_info(r8a66597, urb, hep, &hep->desc); 1896 } 1897 1898 if (unlikely(check_pipe_config(r8a66597, urb))) 1899 init_pipe_config(r8a66597, urb); 1900 1901 set_address_zero(r8a66597, urb); 1902 td = r8a66597_make_td(r8a66597, urb, hep); 1903 if (td == NULL) { 1904 ret = -ENOMEM; 1905 goto error; 1906 } 1907 if (list_empty(&r8a66597->pipe_queue[td->pipenum])) 1908 request = 1; 1909 list_add_tail(&td->queue, &r8a66597->pipe_queue[td->pipenum]); 1910 urb->hcpriv = td; 1911 1912 if (request) { 1913 if (td->pipe->info.timer_interval) { 1914 r8a66597->interval_map |= 1 << td->pipenum; 1915 mod_timer(&r8a66597->interval_timer[td->pipenum], 1916 jiffies + msecs_to_jiffies( 1917 td->pipe->info.timer_interval)); 1918 } else { 1919 ret = start_transfer(r8a66597, td); 1920 if (ret < 0) { 1921 list_del(&td->queue); 1922 kfree(td); 1923 } 1924 } 1925 } else 1926 set_td_timer(r8a66597, td); 1927 1928 error: 1929 if (ret) 1930 usb_hcd_unlink_urb_from_ep(hcd, urb); 1931 error_not_linked: 1932 spin_unlock_irqrestore(&r8a66597->lock, flags); 1933 return ret; 1934 } 1935 1936 static int r8a66597_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, 1937 int status) 1938 { 1939 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd); 1940 struct r8a66597_td *td; 1941 unsigned long flags; 1942 int rc; 1943 1944 spin_lock_irqsave(&r8a66597->lock, flags); 1945 rc = usb_hcd_check_unlink_urb(hcd, urb, status); 1946 if (rc) 1947 goto done; 1948 1949 if (urb->hcpriv) { 1950 td = urb->hcpriv; 1951 pipe_stop(r8a66597, td->pipe); 1952 pipe_irq_disable(r8a66597, td->pipenum); 1953 disable_irq_empty(r8a66597, td->pipenum); 1954 finish_request(r8a66597, td, td->pipenum, urb, status); 1955 } 1956 done: 1957 spin_unlock_irqrestore(&r8a66597->lock, flags); 1958 return rc; 1959 } 1960 1961 static void r8a66597_endpoint_disable(struct usb_hcd *hcd, 1962 struct usb_host_endpoint *hep) 1963 { 1964 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd); 1965 struct r8a66597_pipe *pipe = (struct r8a66597_pipe *)hep->hcpriv; 1966 struct r8a66597_td *td; 1967 struct urb *urb = NULL; 1968 u16 pipenum; 1969 unsigned long flags; 1970 1971 if (pipe == NULL) 1972 return; 1973 pipenum = pipe->info.pipenum; 1974 1975 if (pipenum == 0) { 1976 kfree(hep->hcpriv); 1977 hep->hcpriv = NULL; 1978 return; 1979 } 1980 1981 spin_lock_irqsave(&r8a66597->lock, flags); 1982 pipe_stop(r8a66597, pipe); 1983 pipe_irq_disable(r8a66597, pipenum); 1984 disable_irq_empty(r8a66597, pipenum); 1985 td = r8a66597_get_td(r8a66597, pipenum); 1986 if (td) 1987 urb = td->urb; 1988 finish_request(r8a66597, td, pipenum, urb, -ESHUTDOWN); 1989 kfree(hep->hcpriv); 1990 hep->hcpriv = NULL; 1991 spin_unlock_irqrestore(&r8a66597->lock, flags); 1992 } 1993 1994 static int r8a66597_get_frame(struct usb_hcd *hcd) 1995 { 1996 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd); 1997 return r8a66597_read(r8a66597, FRMNUM) & 0x03FF; 1998 } 1999 2000 static void collect_usb_address_map(struct usb_device *udev, unsigned long *map) 2001 { 2002 int chix; 2003 2004 if (udev->state == USB_STATE_CONFIGURED && 2005 udev->parent && udev->parent->devnum > 1 && 2006 udev->parent->descriptor.bDeviceClass == USB_CLASS_HUB) 2007 map[udev->devnum/32] |= (1 << (udev->devnum % 32)); 2008 2009 for (chix = 0; chix < udev->maxchild; chix++) { 2010 struct usb_device *childdev = udev->children[chix]; 2011 2012 if (childdev) 2013 collect_usb_address_map(childdev, map); 2014 } 2015 } 2016 2017 /* this function must be called with interrupt disabled */ 2018 static struct r8a66597_device *get_r8a66597_device(struct r8a66597 *r8a66597, 2019 int addr) 2020 { 2021 struct r8a66597_device *dev; 2022 struct list_head *list = &r8a66597->child_device; 2023 2024 list_for_each_entry(dev, list, device_list) { 2025 if (!dev) 2026 continue; 2027 if (dev->usb_address != addr) 2028 continue; 2029 2030 return dev; 2031 } 2032 2033 printk(KERN_ERR "r8a66597: get_r8a66597_device fail.(%d)\n", addr); 2034 return NULL; 2035 } 2036 2037 static void update_usb_address_map(struct r8a66597 *r8a66597, 2038 struct usb_device *root_hub, 2039 unsigned long *map) 2040 { 2041 int i, j, addr; 2042 unsigned long diff; 2043 unsigned long flags; 2044 2045 for (i = 0; i < 4; i++) { 2046 diff = r8a66597->child_connect_map[i] ^ map[i]; 2047 if (!diff) 2048 continue; 2049 2050 for (j = 0; j < 32; j++) { 2051 if (!(diff & (1 << j))) 2052 continue; 2053 2054 addr = i * 32 + j; 2055 if (map[i] & (1 << j)) 2056 set_child_connect_map(r8a66597, addr); 2057 else { 2058 struct r8a66597_device *dev; 2059 2060 spin_lock_irqsave(&r8a66597->lock, flags); 2061 dev = get_r8a66597_device(r8a66597, addr); 2062 disable_r8a66597_pipe_all(r8a66597, dev); 2063 free_usb_address(r8a66597, dev); 2064 put_child_connect_map(r8a66597, addr); 2065 spin_unlock_irqrestore(&r8a66597->lock, flags); 2066 } 2067 } 2068 } 2069 } 2070 2071 static void r8a66597_check_detect_child(struct r8a66597 *r8a66597, 2072 struct usb_hcd *hcd) 2073 { 2074 struct usb_bus *bus; 2075 unsigned long now_map[4]; 2076 2077 memset(now_map, 0, sizeof(now_map)); 2078 2079 list_for_each_entry(bus, &usb_bus_list, bus_list) { 2080 if (!bus->root_hub) 2081 continue; 2082 2083 if (bus->busnum != hcd->self.busnum) 2084 continue; 2085 2086 collect_usb_address_map(bus->root_hub, now_map); 2087 update_usb_address_map(r8a66597, bus->root_hub, now_map); 2088 } 2089 } 2090 2091 static int r8a66597_hub_status_data(struct usb_hcd *hcd, char *buf) 2092 { 2093 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd); 2094 unsigned long flags; 2095 int i; 2096 2097 r8a66597_check_detect_child(r8a66597, hcd); 2098 2099 spin_lock_irqsave(&r8a66597->lock, flags); 2100 2101 *buf = 0; /* initialize (no change) */ 2102 2103 for (i = 0; i < R8A66597_MAX_ROOT_HUB; i++) { 2104 if (r8a66597->root_hub[i].port & 0xffff0000) 2105 *buf |= 1 << (i + 1); 2106 } 2107 2108 spin_unlock_irqrestore(&r8a66597->lock, flags); 2109 2110 return (*buf != 0); 2111 } 2112 2113 static void r8a66597_hub_descriptor(struct r8a66597 *r8a66597, 2114 struct usb_hub_descriptor *desc) 2115 { 2116 desc->bDescriptorType = 0x29; 2117 desc->bHubContrCurrent = 0; 2118 desc->bNbrPorts = R8A66597_MAX_ROOT_HUB; 2119 desc->bDescLength = 9; 2120 desc->bPwrOn2PwrGood = 0; 2121 desc->wHubCharacteristics = cpu_to_le16(0x0011); 2122 desc->bitmap[0] = ((1 << R8A66597_MAX_ROOT_HUB) - 1) << 1; 2123 desc->bitmap[1] = ~0; 2124 } 2125 2126 static int r8a66597_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, 2127 u16 wIndex, char *buf, u16 wLength) 2128 { 2129 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd); 2130 int ret; 2131 int port = (wIndex & 0x00FF) - 1; 2132 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port]; 2133 unsigned long flags; 2134 2135 ret = 0; 2136 2137 spin_lock_irqsave(&r8a66597->lock, flags); 2138 switch (typeReq) { 2139 case ClearHubFeature: 2140 case SetHubFeature: 2141 switch (wValue) { 2142 case C_HUB_OVER_CURRENT: 2143 case C_HUB_LOCAL_POWER: 2144 break; 2145 default: 2146 goto error; 2147 } 2148 break; 2149 case ClearPortFeature: 2150 if (wIndex > R8A66597_MAX_ROOT_HUB) 2151 goto error; 2152 if (wLength != 0) 2153 goto error; 2154 2155 switch (wValue) { 2156 case USB_PORT_FEAT_ENABLE: 2157 rh->port &= ~(1 << USB_PORT_FEAT_POWER); 2158 break; 2159 case USB_PORT_FEAT_SUSPEND: 2160 break; 2161 case USB_PORT_FEAT_POWER: 2162 r8a66597_port_power(r8a66597, port, 0); 2163 break; 2164 case USB_PORT_FEAT_C_ENABLE: 2165 case USB_PORT_FEAT_C_SUSPEND: 2166 case USB_PORT_FEAT_C_CONNECTION: 2167 case USB_PORT_FEAT_C_OVER_CURRENT: 2168 case USB_PORT_FEAT_C_RESET: 2169 break; 2170 default: 2171 goto error; 2172 } 2173 rh->port &= ~(1 << wValue); 2174 break; 2175 case GetHubDescriptor: 2176 r8a66597_hub_descriptor(r8a66597, 2177 (struct usb_hub_descriptor *)buf); 2178 break; 2179 case GetHubStatus: 2180 *buf = 0x00; 2181 break; 2182 case GetPortStatus: 2183 if (wIndex > R8A66597_MAX_ROOT_HUB) 2184 goto error; 2185 *(__le32 *)buf = cpu_to_le32(rh->port); 2186 break; 2187 case SetPortFeature: 2188 if (wIndex > R8A66597_MAX_ROOT_HUB) 2189 goto error; 2190 if (wLength != 0) 2191 goto error; 2192 2193 switch (wValue) { 2194 case USB_PORT_FEAT_SUSPEND: 2195 break; 2196 case USB_PORT_FEAT_POWER: 2197 r8a66597_port_power(r8a66597, port, 1); 2198 rh->port |= (1 << USB_PORT_FEAT_POWER); 2199 break; 2200 case USB_PORT_FEAT_RESET: { 2201 struct r8a66597_device *dev = rh->dev; 2202 2203 rh->port |= (1 << USB_PORT_FEAT_RESET); 2204 2205 disable_r8a66597_pipe_all(r8a66597, dev); 2206 free_usb_address(r8a66597, dev); 2207 2208 r8a66597_mdfy(r8a66597, USBRST, USBRST | UACT, 2209 get_dvstctr_reg(port)); 2210 mod_timer(&r8a66597->rh_timer, 2211 jiffies + msecs_to_jiffies(50)); 2212 } 2213 break; 2214 default: 2215 goto error; 2216 } 2217 rh->port |= 1 << wValue; 2218 break; 2219 default: 2220 error: 2221 ret = -EPIPE; 2222 break; 2223 } 2224 2225 spin_unlock_irqrestore(&r8a66597->lock, flags); 2226 return ret; 2227 } 2228 2229 #if defined(CONFIG_PM) 2230 static int r8a66597_bus_suspend(struct usb_hcd *hcd) 2231 { 2232 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd); 2233 int port; 2234 2235 dbg("%s", __func__); 2236 2237 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) { 2238 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port]; 2239 unsigned long dvstctr_reg = get_dvstctr_reg(port); 2240 2241 if (!(rh->port & (1 << USB_PORT_FEAT_ENABLE))) 2242 continue; 2243 2244 dbg("suspend port = %d", port); 2245 r8a66597_bclr(r8a66597, UACT, dvstctr_reg); /* suspend */ 2246 rh->port |= 1 << USB_PORT_FEAT_SUSPEND; 2247 2248 if (rh->dev->udev->do_remote_wakeup) { 2249 msleep(3); /* waiting last SOF */ 2250 r8a66597_bset(r8a66597, RWUPE, dvstctr_reg); 2251 r8a66597_write(r8a66597, ~BCHG, get_intsts_reg(port)); 2252 r8a66597_bset(r8a66597, BCHGE, get_intenb_reg(port)); 2253 } 2254 } 2255 2256 r8a66597->bus_suspended = 1; 2257 2258 return 0; 2259 } 2260 2261 static int r8a66597_bus_resume(struct usb_hcd *hcd) 2262 { 2263 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd); 2264 int port; 2265 2266 dbg("%s", __func__); 2267 2268 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) { 2269 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port]; 2270 unsigned long dvstctr_reg = get_dvstctr_reg(port); 2271 2272 if (!(rh->port & (1 << USB_PORT_FEAT_SUSPEND))) 2273 continue; 2274 2275 dbg("resume port = %d", port); 2276 rh->port &= ~(1 << USB_PORT_FEAT_SUSPEND); 2277 rh->port |= 1 << USB_PORT_FEAT_C_SUSPEND; 2278 r8a66597_mdfy(r8a66597, RESUME, RESUME | UACT, dvstctr_reg); 2279 msleep(50); 2280 r8a66597_mdfy(r8a66597, UACT, RESUME | UACT, dvstctr_reg); 2281 } 2282 2283 return 0; 2284 2285 } 2286 #else 2287 #define r8a66597_bus_suspend NULL 2288 #define r8a66597_bus_resume NULL 2289 #endif 2290 2291 static struct hc_driver r8a66597_hc_driver = { 2292 .description = hcd_name, 2293 .hcd_priv_size = sizeof(struct r8a66597), 2294 .irq = r8a66597_irq, 2295 2296 /* 2297 * generic hardware linkage 2298 */ 2299 .flags = HCD_USB2, 2300 2301 .start = r8a66597_start, 2302 .stop = r8a66597_stop, 2303 2304 /* 2305 * managing i/o requests and associated device resources 2306 */ 2307 .urb_enqueue = r8a66597_urb_enqueue, 2308 .urb_dequeue = r8a66597_urb_dequeue, 2309 .endpoint_disable = r8a66597_endpoint_disable, 2310 2311 /* 2312 * periodic schedule support 2313 */ 2314 .get_frame_number = r8a66597_get_frame, 2315 2316 /* 2317 * root hub support 2318 */ 2319 .hub_status_data = r8a66597_hub_status_data, 2320 .hub_control = r8a66597_hub_control, 2321 .bus_suspend = r8a66597_bus_suspend, 2322 .bus_resume = r8a66597_bus_resume, 2323 }; 2324 2325 #if defined(CONFIG_PM) 2326 static int r8a66597_suspend(struct platform_device *pdev, pm_message_t state) 2327 { 2328 struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev); 2329 int port; 2330 2331 dbg("%s", __func__); 2332 2333 disable_controller(r8a66597); 2334 2335 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) { 2336 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port]; 2337 2338 rh->port = 0x00000000; 2339 } 2340 2341 return 0; 2342 } 2343 2344 static int r8a66597_resume(struct platform_device *pdev) 2345 { 2346 struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev); 2347 struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597); 2348 2349 dbg("%s", __func__); 2350 2351 enable_controller(r8a66597); 2352 usb_root_hub_lost_power(hcd->self.root_hub); 2353 2354 return 0; 2355 } 2356 #else /* if defined(CONFIG_PM) */ 2357 #define r8a66597_suspend NULL 2358 #define r8a66597_resume NULL 2359 #endif 2360 2361 static int __init_or_module r8a66597_remove(struct platform_device *pdev) 2362 { 2363 struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev); 2364 struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597); 2365 2366 del_timer_sync(&r8a66597->rh_timer); 2367 usb_remove_hcd(hcd); 2368 iounmap((void *)r8a66597->reg); 2369 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK) 2370 clk_put(r8a66597->clk); 2371 #endif 2372 usb_put_hcd(hcd); 2373 return 0; 2374 } 2375 2376 static int __init r8a66597_probe(struct platform_device *pdev) 2377 { 2378 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK) 2379 char clk_name[8]; 2380 #endif 2381 struct resource *res = NULL, *ires; 2382 int irq = -1; 2383 void __iomem *reg = NULL; 2384 struct usb_hcd *hcd = NULL; 2385 struct r8a66597 *r8a66597; 2386 int ret = 0; 2387 int i; 2388 unsigned long irq_trigger; 2389 2390 if (pdev->dev.dma_mask) { 2391 ret = -EINVAL; 2392 dev_err(&pdev->dev, "dma not supported\n"); 2393 goto clean_up; 2394 } 2395 2396 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2397 if (!res) { 2398 ret = -ENODEV; 2399 dev_err(&pdev->dev, "platform_get_resource error.\n"); 2400 goto clean_up; 2401 } 2402 2403 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 2404 if (!ires) { 2405 ret = -ENODEV; 2406 dev_err(&pdev->dev, 2407 "platform_get_resource IORESOURCE_IRQ error.\n"); 2408 goto clean_up; 2409 } 2410 2411 irq = ires->start; 2412 irq_trigger = ires->flags & IRQF_TRIGGER_MASK; 2413 2414 reg = ioremap(res->start, resource_size(res)); 2415 if (reg == NULL) { 2416 ret = -ENOMEM; 2417 dev_err(&pdev->dev, "ioremap error.\n"); 2418 goto clean_up; 2419 } 2420 2421 /* initialize hcd */ 2422 hcd = usb_create_hcd(&r8a66597_hc_driver, &pdev->dev, (char *)hcd_name); 2423 if (!hcd) { 2424 ret = -ENOMEM; 2425 dev_err(&pdev->dev, "Failed to create hcd\n"); 2426 goto clean_up; 2427 } 2428 r8a66597 = hcd_to_r8a66597(hcd); 2429 memset(r8a66597, 0, sizeof(struct r8a66597)); 2430 dev_set_drvdata(&pdev->dev, r8a66597); 2431 2432 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK) 2433 snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id); 2434 r8a66597->clk = clk_get(&pdev->dev, clk_name); 2435 if (IS_ERR(r8a66597->clk)) { 2436 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); 2437 ret = PTR_ERR(r8a66597->clk); 2438 goto clean_up2; 2439 } 2440 #endif 2441 2442 spin_lock_init(&r8a66597->lock); 2443 init_timer(&r8a66597->rh_timer); 2444 r8a66597->rh_timer.function = r8a66597_timer; 2445 r8a66597->rh_timer.data = (unsigned long)r8a66597; 2446 r8a66597->reg = (unsigned long)reg; 2447 2448 for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) { 2449 INIT_LIST_HEAD(&r8a66597->pipe_queue[i]); 2450 init_timer(&r8a66597->td_timer[i]); 2451 r8a66597->td_timer[i].function = r8a66597_td_timer; 2452 r8a66597->td_timer[i].data = (unsigned long)r8a66597; 2453 setup_timer(&r8a66597->interval_timer[i], 2454 r8a66597_interval_timer, 2455 (unsigned long)r8a66597); 2456 } 2457 INIT_LIST_HEAD(&r8a66597->child_device); 2458 2459 hcd->rsrc_start = res->start; 2460 2461 /* irq_sense setting on cmdline takes precedence over resource 2462 * settings, so the introduction of irqflags in IRQ resourse 2463 * won't disturb existing setups */ 2464 switch (irq_sense) { 2465 case INTL: 2466 irq_trigger = IRQF_TRIGGER_LOW; 2467 break; 2468 case 0: 2469 irq_trigger = IRQF_TRIGGER_FALLING; 2470 break; 2471 case 0xff: 2472 if (irq_trigger) 2473 irq_sense = (irq_trigger & IRQF_TRIGGER_LOW) ? 2474 INTL : 0; 2475 else { 2476 irq_sense = INTL; 2477 irq_trigger = IRQF_TRIGGER_LOW; 2478 } 2479 break; 2480 default: 2481 dev_err(&pdev->dev, "Unknown irq_sense value.\n"); 2482 } 2483 2484 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | irq_trigger); 2485 if (ret != 0) { 2486 dev_err(&pdev->dev, "Failed to add hcd\n"); 2487 goto clean_up3; 2488 } 2489 2490 return 0; 2491 2492 clean_up3: 2493 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK) 2494 clk_put(r8a66597->clk); 2495 clean_up2: 2496 #endif 2497 usb_put_hcd(hcd); 2498 2499 clean_up: 2500 if (reg) 2501 iounmap(reg); 2502 2503 return ret; 2504 } 2505 2506 static struct platform_driver r8a66597_driver = { 2507 .probe = r8a66597_probe, 2508 .remove = r8a66597_remove, 2509 .suspend = r8a66597_suspend, 2510 .resume = r8a66597_resume, 2511 .driver = { 2512 .name = (char *) hcd_name, 2513 .owner = THIS_MODULE, 2514 }, 2515 }; 2516 2517 static int __init r8a66597_init(void) 2518 { 2519 if (usb_disabled()) 2520 return -ENODEV; 2521 2522 printk(KERN_INFO KBUILD_MODNAME ": driver %s, %s\n", hcd_name, 2523 DRIVER_VERSION); 2524 return platform_driver_register(&r8a66597_driver); 2525 } 2526 module_init(r8a66597_init); 2527 2528 static void __exit r8a66597_cleanup(void) 2529 { 2530 platform_driver_unregister(&r8a66597_driver); 2531 } 2532 module_exit(r8a66597_cleanup); 2533 2534