1 /* 2 * Driver for the NXP ISP1760 chip 3 * 4 * However, the code might contain some bugs. What doesn't work for sure is: 5 * - ISO 6 * - OTG 7 e The interrupt line is configured as active low, level. 8 * 9 * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de> 10 * 11 * (c) 2011 Arvid Brodin <arvid.brodin@enea.com> 12 * 13 */ 14 #include <linux/gpio/consumer.h> 15 #include <linux/module.h> 16 #include <linux/kernel.h> 17 #include <linux/slab.h> 18 #include <linux/list.h> 19 #include <linux/usb.h> 20 #include <linux/usb/hcd.h> 21 #include <linux/debugfs.h> 22 #include <linux/uaccess.h> 23 #include <linux/io.h> 24 #include <linux/mm.h> 25 #include <linux/timer.h> 26 #include <asm/unaligned.h> 27 #include <asm/cacheflush.h> 28 29 #include "isp1760-core.h" 30 #include "isp1760-hcd.h" 31 #include "isp1760-regs.h" 32 33 static struct kmem_cache *qtd_cachep; 34 static struct kmem_cache *qh_cachep; 35 static struct kmem_cache *urb_listitem_cachep; 36 37 typedef void (packet_enqueue)(struct usb_hcd *hcd, struct isp1760_qh *qh, 38 struct isp1760_qtd *qtd); 39 40 static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd) 41 { 42 return *(struct isp1760_hcd **)hcd->hcd_priv; 43 } 44 45 /* urb state*/ 46 #define DELETE_URB (0x0008) 47 #define NO_TRANSFER_ACTIVE (0xffffffff) 48 49 /* Philips Proprietary Transfer Descriptor (PTD) */ 50 typedef __u32 __bitwise __dw; 51 struct ptd { 52 __dw dw0; 53 __dw dw1; 54 __dw dw2; 55 __dw dw3; 56 __dw dw4; 57 __dw dw5; 58 __dw dw6; 59 __dw dw7; 60 }; 61 #define PTD_OFFSET 0x0400 62 #define ISO_PTD_OFFSET 0x0400 63 #define INT_PTD_OFFSET 0x0800 64 #define ATL_PTD_OFFSET 0x0c00 65 #define PAYLOAD_OFFSET 0x1000 66 67 68 /* ATL */ 69 /* DW0 */ 70 #define DW0_VALID_BIT 1 71 #define FROM_DW0_VALID(x) ((x) & 0x01) 72 #define TO_DW0_LENGTH(x) (((u32) x) << 3) 73 #define TO_DW0_MAXPACKET(x) (((u32) x) << 18) 74 #define TO_DW0_MULTI(x) (((u32) x) << 29) 75 #define TO_DW0_ENDPOINT(x) (((u32) x) << 31) 76 /* DW1 */ 77 #define TO_DW1_DEVICE_ADDR(x) (((u32) x) << 3) 78 #define TO_DW1_PID_TOKEN(x) (((u32) x) << 10) 79 #define DW1_TRANS_BULK ((u32) 2 << 12) 80 #define DW1_TRANS_INT ((u32) 3 << 12) 81 #define DW1_TRANS_SPLIT ((u32) 1 << 14) 82 #define DW1_SE_USB_LOSPEED ((u32) 2 << 16) 83 #define TO_DW1_PORT_NUM(x) (((u32) x) << 18) 84 #define TO_DW1_HUB_NUM(x) (((u32) x) << 25) 85 /* DW2 */ 86 #define TO_DW2_DATA_START_ADDR(x) (((u32) x) << 8) 87 #define TO_DW2_RL(x) ((x) << 25) 88 #define FROM_DW2_RL(x) (((x) >> 25) & 0xf) 89 /* DW3 */ 90 #define FROM_DW3_NRBYTESTRANSFERRED(x) ((x) & 0x7fff) 91 #define FROM_DW3_SCS_NRBYTESTRANSFERRED(x) ((x) & 0x07ff) 92 #define TO_DW3_NAKCOUNT(x) ((x) << 19) 93 #define FROM_DW3_NAKCOUNT(x) (((x) >> 19) & 0xf) 94 #define TO_DW3_CERR(x) ((x) << 23) 95 #define FROM_DW3_CERR(x) (((x) >> 23) & 0x3) 96 #define TO_DW3_DATA_TOGGLE(x) ((x) << 25) 97 #define FROM_DW3_DATA_TOGGLE(x) (((x) >> 25) & 0x1) 98 #define TO_DW3_PING(x) ((x) << 26) 99 #define FROM_DW3_PING(x) (((x) >> 26) & 0x1) 100 #define DW3_ERROR_BIT (1 << 28) 101 #define DW3_BABBLE_BIT (1 << 29) 102 #define DW3_HALT_BIT (1 << 30) 103 #define DW3_ACTIVE_BIT (1 << 31) 104 #define FROM_DW3_ACTIVE(x) (((x) >> 31) & 0x01) 105 106 #define INT_UNDERRUN (1 << 2) 107 #define INT_BABBLE (1 << 1) 108 #define INT_EXACT (1 << 0) 109 110 #define SETUP_PID (2) 111 #define IN_PID (1) 112 #define OUT_PID (0) 113 114 /* Errata 1 */ 115 #define RL_COUNTER (0) 116 #define NAK_COUNTER (0) 117 #define ERR_COUNTER (2) 118 119 struct isp1760_qtd { 120 u8 packet_type; 121 void *data_buffer; 122 u32 payload_addr; 123 124 /* the rest is HCD-private */ 125 struct list_head qtd_list; 126 struct urb *urb; 127 size_t length; 128 size_t actual_length; 129 130 /* QTD_ENQUEUED: waiting for transfer (inactive) */ 131 /* QTD_PAYLOAD_ALLOC: chip mem has been allocated for payload */ 132 /* QTD_XFER_STARTED: valid ptd has been written to isp176x - only 133 interrupt handler may touch this qtd! */ 134 /* QTD_XFER_COMPLETE: payload has been transferred successfully */ 135 /* QTD_RETIRE: transfer error/abort qtd */ 136 #define QTD_ENQUEUED 0 137 #define QTD_PAYLOAD_ALLOC 1 138 #define QTD_XFER_STARTED 2 139 #define QTD_XFER_COMPLETE 3 140 #define QTD_RETIRE 4 141 u32 status; 142 }; 143 144 /* Queue head, one for each active endpoint */ 145 struct isp1760_qh { 146 struct list_head qh_list; 147 struct list_head qtd_list; 148 u32 toggle; 149 u32 ping; 150 int slot; 151 int tt_buffer_dirty; /* See USB2.0 spec section 11.17.5 */ 152 }; 153 154 struct urb_listitem { 155 struct list_head urb_list; 156 struct urb *urb; 157 }; 158 159 /* 160 * Access functions for isp176x registers (addresses 0..0x03FF). 161 */ 162 static u32 reg_read32(void __iomem *base, u32 reg) 163 { 164 return isp1760_read32(base, reg); 165 } 166 167 static void reg_write32(void __iomem *base, u32 reg, u32 val) 168 { 169 isp1760_write32(base, reg, val); 170 } 171 172 /* 173 * Access functions for isp176x memory (offset >= 0x0400). 174 * 175 * bank_reads8() reads memory locations prefetched by an earlier write to 176 * HC_MEMORY_REG (see isp176x datasheet). Unless you want to do fancy multi- 177 * bank optimizations, you should use the more generic mem_reads8() below. 178 * 179 * For access to ptd memory, use the specialized ptd_read() and ptd_write() 180 * below. 181 * 182 * These functions copy via MMIO data to/from the device. memcpy_{to|from}io() 183 * doesn't quite work because some people have to enforce 32-bit access 184 */ 185 static void bank_reads8(void __iomem *src_base, u32 src_offset, u32 bank_addr, 186 __u32 *dst, u32 bytes) 187 { 188 __u32 __iomem *src; 189 u32 val; 190 __u8 *src_byteptr; 191 __u8 *dst_byteptr; 192 193 src = src_base + (bank_addr | src_offset); 194 195 if (src_offset < PAYLOAD_OFFSET) { 196 while (bytes >= 4) { 197 *dst = le32_to_cpu(__raw_readl(src)); 198 bytes -= 4; 199 src++; 200 dst++; 201 } 202 } else { 203 while (bytes >= 4) { 204 *dst = __raw_readl(src); 205 bytes -= 4; 206 src++; 207 dst++; 208 } 209 } 210 211 if (!bytes) 212 return; 213 214 /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully 215 * allocated. 216 */ 217 if (src_offset < PAYLOAD_OFFSET) 218 val = le32_to_cpu(__raw_readl(src)); 219 else 220 val = __raw_readl(src); 221 222 dst_byteptr = (void *) dst; 223 src_byteptr = (void *) &val; 224 while (bytes > 0) { 225 *dst_byteptr = *src_byteptr; 226 dst_byteptr++; 227 src_byteptr++; 228 bytes--; 229 } 230 } 231 232 static void mem_reads8(void __iomem *src_base, u32 src_offset, void *dst, 233 u32 bytes) 234 { 235 reg_write32(src_base, HC_MEMORY_REG, src_offset + ISP_BANK(0)); 236 ndelay(90); 237 bank_reads8(src_base, src_offset, ISP_BANK(0), dst, bytes); 238 } 239 240 static void mem_writes8(void __iomem *dst_base, u32 dst_offset, 241 __u32 const *src, u32 bytes) 242 { 243 __u32 __iomem *dst; 244 245 dst = dst_base + dst_offset; 246 247 if (dst_offset < PAYLOAD_OFFSET) { 248 while (bytes >= 4) { 249 __raw_writel(cpu_to_le32(*src), dst); 250 bytes -= 4; 251 src++; 252 dst++; 253 } 254 } else { 255 while (bytes >= 4) { 256 __raw_writel(*src, dst); 257 bytes -= 4; 258 src++; 259 dst++; 260 } 261 } 262 263 if (!bytes) 264 return; 265 /* in case we have 3, 2 or 1 bytes left. The buffer is allocated and the 266 * extra bytes should not be read by the HW. 267 */ 268 269 if (dst_offset < PAYLOAD_OFFSET) 270 __raw_writel(cpu_to_le32(*src), dst); 271 else 272 __raw_writel(*src, dst); 273 } 274 275 /* 276 * Read and write ptds. 'ptd_offset' should be one of ISO_PTD_OFFSET, 277 * INT_PTD_OFFSET, and ATL_PTD_OFFSET. 'slot' should be less than 32. 278 */ 279 static void ptd_read(void __iomem *base, u32 ptd_offset, u32 slot, 280 struct ptd *ptd) 281 { 282 reg_write32(base, HC_MEMORY_REG, 283 ISP_BANK(0) + ptd_offset + slot*sizeof(*ptd)); 284 ndelay(90); 285 bank_reads8(base, ptd_offset + slot*sizeof(*ptd), ISP_BANK(0), 286 (void *) ptd, sizeof(*ptd)); 287 } 288 289 static void ptd_write(void __iomem *base, u32 ptd_offset, u32 slot, 290 struct ptd *ptd) 291 { 292 mem_writes8(base, ptd_offset + slot*sizeof(*ptd) + sizeof(ptd->dw0), 293 &ptd->dw1, 7*sizeof(ptd->dw1)); 294 /* Make sure dw0 gets written last (after other dw's and after payload) 295 since it contains the enable bit */ 296 wmb(); 297 mem_writes8(base, ptd_offset + slot*sizeof(*ptd), &ptd->dw0, 298 sizeof(ptd->dw0)); 299 } 300 301 302 /* memory management of the 60kb on the chip from 0x1000 to 0xffff */ 303 static void init_memory(struct isp1760_hcd *priv) 304 { 305 int i, curr; 306 u32 payload_addr; 307 308 payload_addr = PAYLOAD_OFFSET; 309 for (i = 0; i < BLOCK_1_NUM; i++) { 310 priv->memory_pool[i].start = payload_addr; 311 priv->memory_pool[i].size = BLOCK_1_SIZE; 312 priv->memory_pool[i].free = 1; 313 payload_addr += priv->memory_pool[i].size; 314 } 315 316 curr = i; 317 for (i = 0; i < BLOCK_2_NUM; i++) { 318 priv->memory_pool[curr + i].start = payload_addr; 319 priv->memory_pool[curr + i].size = BLOCK_2_SIZE; 320 priv->memory_pool[curr + i].free = 1; 321 payload_addr += priv->memory_pool[curr + i].size; 322 } 323 324 curr = i; 325 for (i = 0; i < BLOCK_3_NUM; i++) { 326 priv->memory_pool[curr + i].start = payload_addr; 327 priv->memory_pool[curr + i].size = BLOCK_3_SIZE; 328 priv->memory_pool[curr + i].free = 1; 329 payload_addr += priv->memory_pool[curr + i].size; 330 } 331 332 WARN_ON(payload_addr - priv->memory_pool[0].start > PAYLOAD_AREA_SIZE); 333 } 334 335 static void alloc_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd) 336 { 337 struct isp1760_hcd *priv = hcd_to_priv(hcd); 338 int i; 339 340 WARN_ON(qtd->payload_addr); 341 342 if (!qtd->length) 343 return; 344 345 for (i = 0; i < BLOCKS; i++) { 346 if (priv->memory_pool[i].size >= qtd->length && 347 priv->memory_pool[i].free) { 348 priv->memory_pool[i].free = 0; 349 qtd->payload_addr = priv->memory_pool[i].start; 350 return; 351 } 352 } 353 } 354 355 static void free_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd) 356 { 357 struct isp1760_hcd *priv = hcd_to_priv(hcd); 358 int i; 359 360 if (!qtd->payload_addr) 361 return; 362 363 for (i = 0; i < BLOCKS; i++) { 364 if (priv->memory_pool[i].start == qtd->payload_addr) { 365 WARN_ON(priv->memory_pool[i].free); 366 priv->memory_pool[i].free = 1; 367 qtd->payload_addr = 0; 368 return; 369 } 370 } 371 372 dev_err(hcd->self.controller, "%s: Invalid pointer: %08x\n", 373 __func__, qtd->payload_addr); 374 WARN_ON(1); 375 qtd->payload_addr = 0; 376 } 377 378 static int handshake(struct usb_hcd *hcd, u32 reg, 379 u32 mask, u32 done, int usec) 380 { 381 u32 result; 382 383 do { 384 result = reg_read32(hcd->regs, reg); 385 if (result == ~0) 386 return -ENODEV; 387 result &= mask; 388 if (result == done) 389 return 0; 390 udelay(1); 391 usec--; 392 } while (usec > 0); 393 return -ETIMEDOUT; 394 } 395 396 /* reset a non-running (STS_HALT == 1) controller */ 397 static int ehci_reset(struct usb_hcd *hcd) 398 { 399 int retval; 400 struct isp1760_hcd *priv = hcd_to_priv(hcd); 401 402 u32 command = reg_read32(hcd->regs, HC_USBCMD); 403 404 command |= CMD_RESET; 405 reg_write32(hcd->regs, HC_USBCMD, command); 406 hcd->state = HC_STATE_HALT; 407 priv->next_statechange = jiffies; 408 retval = handshake(hcd, HC_USBCMD, 409 CMD_RESET, 0, 250 * 1000); 410 return retval; 411 } 412 413 static struct isp1760_qh *qh_alloc(gfp_t flags) 414 { 415 struct isp1760_qh *qh; 416 417 qh = kmem_cache_zalloc(qh_cachep, flags); 418 if (!qh) 419 return NULL; 420 421 INIT_LIST_HEAD(&qh->qh_list); 422 INIT_LIST_HEAD(&qh->qtd_list); 423 qh->slot = -1; 424 425 return qh; 426 } 427 428 static void qh_free(struct isp1760_qh *qh) 429 { 430 WARN_ON(!list_empty(&qh->qtd_list)); 431 WARN_ON(qh->slot > -1); 432 kmem_cache_free(qh_cachep, qh); 433 } 434 435 /* one-time init, only for memory state */ 436 static int priv_init(struct usb_hcd *hcd) 437 { 438 struct isp1760_hcd *priv = hcd_to_priv(hcd); 439 u32 hcc_params; 440 int i; 441 442 spin_lock_init(&priv->lock); 443 444 for (i = 0; i < QH_END; i++) 445 INIT_LIST_HEAD(&priv->qh_list[i]); 446 447 /* 448 * hw default: 1K periodic list heads, one per frame. 449 * periodic_size can shrink by USBCMD update if hcc_params allows. 450 */ 451 priv->periodic_size = DEFAULT_I_TDPS; 452 453 /* controllers may cache some of the periodic schedule ... */ 454 hcc_params = reg_read32(hcd->regs, HC_HCCPARAMS); 455 /* full frame cache */ 456 if (HCC_ISOC_CACHE(hcc_params)) 457 priv->i_thresh = 8; 458 else /* N microframes cached */ 459 priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params); 460 461 return 0; 462 } 463 464 static int isp1760_hc_setup(struct usb_hcd *hcd) 465 { 466 struct isp1760_hcd *priv = hcd_to_priv(hcd); 467 int result; 468 u32 scratch, hwmode; 469 470 reg_write32(hcd->regs, HC_SCRATCH_REG, 0xdeadbabe); 471 /* Change bus pattern */ 472 scratch = reg_read32(hcd->regs, HC_CHIP_ID_REG); 473 scratch = reg_read32(hcd->regs, HC_SCRATCH_REG); 474 if (scratch != 0xdeadbabe) { 475 dev_err(hcd->self.controller, "Scratch test failed.\n"); 476 return -ENODEV; 477 } 478 479 /* 480 * The RESET_HC bit in the SW_RESET register is supposed to reset the 481 * host controller without touching the CPU interface registers, but at 482 * least on the ISP1761 it seems to behave as the RESET_ALL bit and 483 * reset the whole device. We thus can't use it here, so let's reset 484 * the host controller through the EHCI USB Command register. The device 485 * has been reset in core code anyway, so this shouldn't matter. 486 */ 487 reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, 0); 488 reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); 489 reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); 490 reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); 491 492 result = ehci_reset(hcd); 493 if (result) 494 return result; 495 496 /* Step 11 passed */ 497 498 /* ATL reset */ 499 hwmode = reg_read32(hcd->regs, HC_HW_MODE_CTRL) & ~ALL_ATX_RESET; 500 reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode | ALL_ATX_RESET); 501 mdelay(10); 502 reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode); 503 504 reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, INTERRUPT_ENABLE_MASK); 505 506 priv->hcs_params = reg_read32(hcd->regs, HC_HCSPARAMS); 507 508 return priv_init(hcd); 509 } 510 511 static u32 base_to_chip(u32 base) 512 { 513 return ((base - 0x400) >> 3); 514 } 515 516 static int last_qtd_of_urb(struct isp1760_qtd *qtd, struct isp1760_qh *qh) 517 { 518 struct urb *urb; 519 520 if (list_is_last(&qtd->qtd_list, &qh->qtd_list)) 521 return 1; 522 523 urb = qtd->urb; 524 qtd = list_entry(qtd->qtd_list.next, typeof(*qtd), qtd_list); 525 return (qtd->urb != urb); 526 } 527 528 /* magic numbers that can affect system performance */ 529 #define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */ 530 #define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */ 531 #define EHCI_TUNE_RL_TT 0 532 #define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ 533 #define EHCI_TUNE_MULT_TT 1 534 #define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */ 535 536 static void create_ptd_atl(struct isp1760_qh *qh, 537 struct isp1760_qtd *qtd, struct ptd *ptd) 538 { 539 u32 maxpacket; 540 u32 multi; 541 u32 rl = RL_COUNTER; 542 u32 nak = NAK_COUNTER; 543 544 memset(ptd, 0, sizeof(*ptd)); 545 546 /* according to 3.6.2, max packet len can not be > 0x400 */ 547 maxpacket = usb_maxpacket(qtd->urb->dev, qtd->urb->pipe, 548 usb_pipeout(qtd->urb->pipe)); 549 multi = 1 + ((maxpacket >> 11) & 0x3); 550 maxpacket &= 0x7ff; 551 552 /* DW0 */ 553 ptd->dw0 = DW0_VALID_BIT; 554 ptd->dw0 |= TO_DW0_LENGTH(qtd->length); 555 ptd->dw0 |= TO_DW0_MAXPACKET(maxpacket); 556 ptd->dw0 |= TO_DW0_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe)); 557 558 /* DW1 */ 559 ptd->dw1 = usb_pipeendpoint(qtd->urb->pipe) >> 1; 560 ptd->dw1 |= TO_DW1_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe)); 561 ptd->dw1 |= TO_DW1_PID_TOKEN(qtd->packet_type); 562 563 if (usb_pipebulk(qtd->urb->pipe)) 564 ptd->dw1 |= DW1_TRANS_BULK; 565 else if (usb_pipeint(qtd->urb->pipe)) 566 ptd->dw1 |= DW1_TRANS_INT; 567 568 if (qtd->urb->dev->speed != USB_SPEED_HIGH) { 569 /* split transaction */ 570 571 ptd->dw1 |= DW1_TRANS_SPLIT; 572 if (qtd->urb->dev->speed == USB_SPEED_LOW) 573 ptd->dw1 |= DW1_SE_USB_LOSPEED; 574 575 ptd->dw1 |= TO_DW1_PORT_NUM(qtd->urb->dev->ttport); 576 ptd->dw1 |= TO_DW1_HUB_NUM(qtd->urb->dev->tt->hub->devnum); 577 578 /* SE bit for Split INT transfers */ 579 if (usb_pipeint(qtd->urb->pipe) && 580 (qtd->urb->dev->speed == USB_SPEED_LOW)) 581 ptd->dw1 |= 2 << 16; 582 583 rl = 0; 584 nak = 0; 585 } else { 586 ptd->dw0 |= TO_DW0_MULTI(multi); 587 if (usb_pipecontrol(qtd->urb->pipe) || 588 usb_pipebulk(qtd->urb->pipe)) 589 ptd->dw3 |= TO_DW3_PING(qh->ping); 590 } 591 /* DW2 */ 592 ptd->dw2 = 0; 593 ptd->dw2 |= TO_DW2_DATA_START_ADDR(base_to_chip(qtd->payload_addr)); 594 ptd->dw2 |= TO_DW2_RL(rl); 595 596 /* DW3 */ 597 ptd->dw3 |= TO_DW3_NAKCOUNT(nak); 598 ptd->dw3 |= TO_DW3_DATA_TOGGLE(qh->toggle); 599 if (usb_pipecontrol(qtd->urb->pipe)) { 600 if (qtd->data_buffer == qtd->urb->setup_packet) 601 ptd->dw3 &= ~TO_DW3_DATA_TOGGLE(1); 602 else if (last_qtd_of_urb(qtd, qh)) 603 ptd->dw3 |= TO_DW3_DATA_TOGGLE(1); 604 } 605 606 ptd->dw3 |= DW3_ACTIVE_BIT; 607 /* Cerr */ 608 ptd->dw3 |= TO_DW3_CERR(ERR_COUNTER); 609 } 610 611 static void transform_add_int(struct isp1760_qh *qh, 612 struct isp1760_qtd *qtd, struct ptd *ptd) 613 { 614 u32 usof; 615 u32 period; 616 617 /* 618 * Most of this is guessing. ISP1761 datasheet is quite unclear, and 619 * the algorithm from the original Philips driver code, which was 620 * pretty much used in this driver before as well, is quite horrendous 621 * and, i believe, incorrect. The code below follows the datasheet and 622 * USB2.0 spec as far as I can tell, and plug/unplug seems to be much 623 * more reliable this way (fingers crossed...). 624 */ 625 626 if (qtd->urb->dev->speed == USB_SPEED_HIGH) { 627 /* urb->interval is in units of microframes (1/8 ms) */ 628 period = qtd->urb->interval >> 3; 629 630 if (qtd->urb->interval > 4) 631 usof = 0x01; /* One bit set => 632 interval 1 ms * uFrame-match */ 633 else if (qtd->urb->interval > 2) 634 usof = 0x22; /* Two bits set => interval 1/2 ms */ 635 else if (qtd->urb->interval > 1) 636 usof = 0x55; /* Four bits set => interval 1/4 ms */ 637 else 638 usof = 0xff; /* All bits set => interval 1/8 ms */ 639 } else { 640 /* urb->interval is in units of frames (1 ms) */ 641 period = qtd->urb->interval; 642 usof = 0x0f; /* Execute Start Split on any of the 643 four first uFrames */ 644 645 /* 646 * First 8 bits in dw5 is uSCS and "specifies which uSOF the 647 * complete split needs to be sent. Valid only for IN." Also, 648 * "All bits can be set to one for every transfer." (p 82, 649 * ISP1761 data sheet.) 0x1c is from Philips driver. Where did 650 * that number come from? 0xff seems to work fine... 651 */ 652 /* ptd->dw5 = 0x1c; */ 653 ptd->dw5 = 0xff; /* Execute Complete Split on any uFrame */ 654 } 655 656 period = period >> 1;/* Ensure equal or shorter period than requested */ 657 period &= 0xf8; /* Mask off too large values and lowest unused 3 bits */ 658 659 ptd->dw2 |= period; 660 ptd->dw4 = usof; 661 } 662 663 static void create_ptd_int(struct isp1760_qh *qh, 664 struct isp1760_qtd *qtd, struct ptd *ptd) 665 { 666 create_ptd_atl(qh, qtd, ptd); 667 transform_add_int(qh, qtd, ptd); 668 } 669 670 static void isp1760_urb_done(struct usb_hcd *hcd, struct urb *urb) 671 __releases(priv->lock) 672 __acquires(priv->lock) 673 { 674 struct isp1760_hcd *priv = hcd_to_priv(hcd); 675 676 if (!urb->unlinked) { 677 if (urb->status == -EINPROGRESS) 678 urb->status = 0; 679 } 680 681 if (usb_pipein(urb->pipe) && usb_pipetype(urb->pipe) != PIPE_CONTROL) { 682 void *ptr; 683 for (ptr = urb->transfer_buffer; 684 ptr < urb->transfer_buffer + urb->transfer_buffer_length; 685 ptr += PAGE_SIZE) 686 flush_dcache_page(virt_to_page(ptr)); 687 } 688 689 /* complete() can reenter this HCD */ 690 usb_hcd_unlink_urb_from_ep(hcd, urb); 691 spin_unlock(&priv->lock); 692 usb_hcd_giveback_urb(hcd, urb, urb->status); 693 spin_lock(&priv->lock); 694 } 695 696 static struct isp1760_qtd *qtd_alloc(gfp_t flags, struct urb *urb, 697 u8 packet_type) 698 { 699 struct isp1760_qtd *qtd; 700 701 qtd = kmem_cache_zalloc(qtd_cachep, flags); 702 if (!qtd) 703 return NULL; 704 705 INIT_LIST_HEAD(&qtd->qtd_list); 706 qtd->urb = urb; 707 qtd->packet_type = packet_type; 708 qtd->status = QTD_ENQUEUED; 709 qtd->actual_length = 0; 710 711 return qtd; 712 } 713 714 static void qtd_free(struct isp1760_qtd *qtd) 715 { 716 WARN_ON(qtd->payload_addr); 717 kmem_cache_free(qtd_cachep, qtd); 718 } 719 720 static void start_bus_transfer(struct usb_hcd *hcd, u32 ptd_offset, int slot, 721 struct isp1760_slotinfo *slots, 722 struct isp1760_qtd *qtd, struct isp1760_qh *qh, 723 struct ptd *ptd) 724 { 725 struct isp1760_hcd *priv = hcd_to_priv(hcd); 726 int skip_map; 727 728 WARN_ON((slot < 0) || (slot > 31)); 729 WARN_ON(qtd->length && !qtd->payload_addr); 730 WARN_ON(slots[slot].qtd); 731 WARN_ON(slots[slot].qh); 732 WARN_ON(qtd->status != QTD_PAYLOAD_ALLOC); 733 734 /* Make sure done map has not triggered from some unlinked transfer */ 735 if (ptd_offset == ATL_PTD_OFFSET) { 736 priv->atl_done_map |= reg_read32(hcd->regs, 737 HC_ATL_PTD_DONEMAP_REG); 738 priv->atl_done_map &= ~(1 << slot); 739 } else { 740 priv->int_done_map |= reg_read32(hcd->regs, 741 HC_INT_PTD_DONEMAP_REG); 742 priv->int_done_map &= ~(1 << slot); 743 } 744 745 qh->slot = slot; 746 qtd->status = QTD_XFER_STARTED; 747 slots[slot].timestamp = jiffies; 748 slots[slot].qtd = qtd; 749 slots[slot].qh = qh; 750 ptd_write(hcd->regs, ptd_offset, slot, ptd); 751 752 if (ptd_offset == ATL_PTD_OFFSET) { 753 skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); 754 skip_map &= ~(1 << qh->slot); 755 reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map); 756 } else { 757 skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); 758 skip_map &= ~(1 << qh->slot); 759 reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map); 760 } 761 } 762 763 static int is_short_bulk(struct isp1760_qtd *qtd) 764 { 765 return (usb_pipebulk(qtd->urb->pipe) && 766 (qtd->actual_length < qtd->length)); 767 } 768 769 static void collect_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh, 770 struct list_head *urb_list) 771 { 772 int last_qtd; 773 struct isp1760_qtd *qtd, *qtd_next; 774 struct urb_listitem *urb_listitem; 775 776 list_for_each_entry_safe(qtd, qtd_next, &qh->qtd_list, qtd_list) { 777 if (qtd->status < QTD_XFER_COMPLETE) 778 break; 779 780 last_qtd = last_qtd_of_urb(qtd, qh); 781 782 if ((!last_qtd) && (qtd->status == QTD_RETIRE)) 783 qtd_next->status = QTD_RETIRE; 784 785 if (qtd->status == QTD_XFER_COMPLETE) { 786 if (qtd->actual_length) { 787 switch (qtd->packet_type) { 788 case IN_PID: 789 mem_reads8(hcd->regs, qtd->payload_addr, 790 qtd->data_buffer, 791 qtd->actual_length); 792 /* Fall through (?) */ 793 case OUT_PID: 794 qtd->urb->actual_length += 795 qtd->actual_length; 796 /* Fall through ... */ 797 case SETUP_PID: 798 break; 799 } 800 } 801 802 if (is_short_bulk(qtd)) { 803 if (qtd->urb->transfer_flags & URB_SHORT_NOT_OK) 804 qtd->urb->status = -EREMOTEIO; 805 if (!last_qtd) 806 qtd_next->status = QTD_RETIRE; 807 } 808 } 809 810 if (qtd->payload_addr) 811 free_mem(hcd, qtd); 812 813 if (last_qtd) { 814 if ((qtd->status == QTD_RETIRE) && 815 (qtd->urb->status == -EINPROGRESS)) 816 qtd->urb->status = -EPIPE; 817 /* Defer calling of urb_done() since it releases lock */ 818 urb_listitem = kmem_cache_zalloc(urb_listitem_cachep, 819 GFP_ATOMIC); 820 if (unlikely(!urb_listitem)) 821 break; /* Try again on next call */ 822 urb_listitem->urb = qtd->urb; 823 list_add_tail(&urb_listitem->urb_list, urb_list); 824 } 825 826 list_del(&qtd->qtd_list); 827 qtd_free(qtd); 828 } 829 } 830 831 #define ENQUEUE_DEPTH 2 832 static void enqueue_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh) 833 { 834 struct isp1760_hcd *priv = hcd_to_priv(hcd); 835 int ptd_offset; 836 struct isp1760_slotinfo *slots; 837 int curr_slot, free_slot; 838 int n; 839 struct ptd ptd; 840 struct isp1760_qtd *qtd; 841 842 if (unlikely(list_empty(&qh->qtd_list))) { 843 WARN_ON(1); 844 return; 845 } 846 847 /* Make sure this endpoint's TT buffer is clean before queueing ptds */ 848 if (qh->tt_buffer_dirty) 849 return; 850 851 if (usb_pipeint(list_entry(qh->qtd_list.next, struct isp1760_qtd, 852 qtd_list)->urb->pipe)) { 853 ptd_offset = INT_PTD_OFFSET; 854 slots = priv->int_slots; 855 } else { 856 ptd_offset = ATL_PTD_OFFSET; 857 slots = priv->atl_slots; 858 } 859 860 free_slot = -1; 861 for (curr_slot = 0; curr_slot < 32; curr_slot++) { 862 if ((free_slot == -1) && (slots[curr_slot].qtd == NULL)) 863 free_slot = curr_slot; 864 if (slots[curr_slot].qh == qh) 865 break; 866 } 867 868 n = 0; 869 list_for_each_entry(qtd, &qh->qtd_list, qtd_list) { 870 if (qtd->status == QTD_ENQUEUED) { 871 WARN_ON(qtd->payload_addr); 872 alloc_mem(hcd, qtd); 873 if ((qtd->length) && (!qtd->payload_addr)) 874 break; 875 876 if ((qtd->length) && 877 ((qtd->packet_type == SETUP_PID) || 878 (qtd->packet_type == OUT_PID))) { 879 mem_writes8(hcd->regs, qtd->payload_addr, 880 qtd->data_buffer, qtd->length); 881 } 882 883 qtd->status = QTD_PAYLOAD_ALLOC; 884 } 885 886 if (qtd->status == QTD_PAYLOAD_ALLOC) { 887 /* 888 if ((curr_slot > 31) && (free_slot == -1)) 889 dev_dbg(hcd->self.controller, "%s: No slot " 890 "available for transfer\n", __func__); 891 */ 892 /* Start xfer for this endpoint if not already done */ 893 if ((curr_slot > 31) && (free_slot > -1)) { 894 if (usb_pipeint(qtd->urb->pipe)) 895 create_ptd_int(qh, qtd, &ptd); 896 else 897 create_ptd_atl(qh, qtd, &ptd); 898 899 start_bus_transfer(hcd, ptd_offset, free_slot, 900 slots, qtd, qh, &ptd); 901 curr_slot = free_slot; 902 } 903 904 n++; 905 if (n >= ENQUEUE_DEPTH) 906 break; 907 } 908 } 909 } 910 911 static void schedule_ptds(struct usb_hcd *hcd) 912 { 913 struct isp1760_hcd *priv; 914 struct isp1760_qh *qh, *qh_next; 915 struct list_head *ep_queue; 916 LIST_HEAD(urb_list); 917 struct urb_listitem *urb_listitem, *urb_listitem_next; 918 int i; 919 920 if (!hcd) { 921 WARN_ON(1); 922 return; 923 } 924 925 priv = hcd_to_priv(hcd); 926 927 /* 928 * check finished/retired xfers, transfer payloads, call urb_done() 929 */ 930 for (i = 0; i < QH_END; i++) { 931 ep_queue = &priv->qh_list[i]; 932 list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) { 933 collect_qtds(hcd, qh, &urb_list); 934 if (list_empty(&qh->qtd_list)) 935 list_del(&qh->qh_list); 936 } 937 } 938 939 list_for_each_entry_safe(urb_listitem, urb_listitem_next, &urb_list, 940 urb_list) { 941 isp1760_urb_done(hcd, urb_listitem->urb); 942 kmem_cache_free(urb_listitem_cachep, urb_listitem); 943 } 944 945 /* 946 * Schedule packets for transfer. 947 * 948 * According to USB2.0 specification: 949 * 950 * 1st prio: interrupt xfers, up to 80 % of bandwidth 951 * 2nd prio: control xfers 952 * 3rd prio: bulk xfers 953 * 954 * ... but let's use a simpler scheme here (mostly because ISP1761 doc 955 * is very unclear on how to prioritize traffic): 956 * 957 * 1) Enqueue any queued control transfers, as long as payload chip mem 958 * and PTD ATL slots are available. 959 * 2) Enqueue any queued INT transfers, as long as payload chip mem 960 * and PTD INT slots are available. 961 * 3) Enqueue any queued bulk transfers, as long as payload chip mem 962 * and PTD ATL slots are available. 963 * 964 * Use double buffering (ENQUEUE_DEPTH==2) as a compromise between 965 * conservation of chip mem and performance. 966 * 967 * I'm sure this scheme could be improved upon! 968 */ 969 for (i = 0; i < QH_END; i++) { 970 ep_queue = &priv->qh_list[i]; 971 list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) 972 enqueue_qtds(hcd, qh); 973 } 974 } 975 976 #define PTD_STATE_QTD_DONE 1 977 #define PTD_STATE_QTD_RELOAD 2 978 #define PTD_STATE_URB_RETIRE 3 979 980 static int check_int_transfer(struct usb_hcd *hcd, struct ptd *ptd, 981 struct urb *urb) 982 { 983 __dw dw4; 984 int i; 985 986 dw4 = ptd->dw4; 987 dw4 >>= 8; 988 989 /* FIXME: ISP1761 datasheet does not say what to do with these. Do we 990 need to handle these errors? Is it done in hardware? */ 991 992 if (ptd->dw3 & DW3_HALT_BIT) { 993 994 urb->status = -EPROTO; /* Default unknown error */ 995 996 for (i = 0; i < 8; i++) { 997 switch (dw4 & 0x7) { 998 case INT_UNDERRUN: 999 dev_dbg(hcd->self.controller, "%s: underrun " 1000 "during uFrame %d\n", 1001 __func__, i); 1002 urb->status = -ECOMM; /* Could not write data */ 1003 break; 1004 case INT_EXACT: 1005 dev_dbg(hcd->self.controller, "%s: transaction " 1006 "error during uFrame %d\n", 1007 __func__, i); 1008 urb->status = -EPROTO; /* timeout, bad CRC, PID 1009 error etc. */ 1010 break; 1011 case INT_BABBLE: 1012 dev_dbg(hcd->self.controller, "%s: babble " 1013 "error during uFrame %d\n", 1014 __func__, i); 1015 urb->status = -EOVERFLOW; 1016 break; 1017 } 1018 dw4 >>= 3; 1019 } 1020 1021 return PTD_STATE_URB_RETIRE; 1022 } 1023 1024 return PTD_STATE_QTD_DONE; 1025 } 1026 1027 static int check_atl_transfer(struct usb_hcd *hcd, struct ptd *ptd, 1028 struct urb *urb) 1029 { 1030 WARN_ON(!ptd); 1031 if (ptd->dw3 & DW3_HALT_BIT) { 1032 if (ptd->dw3 & DW3_BABBLE_BIT) 1033 urb->status = -EOVERFLOW; 1034 else if (FROM_DW3_CERR(ptd->dw3)) 1035 urb->status = -EPIPE; /* Stall */ 1036 else if (ptd->dw3 & DW3_ERROR_BIT) 1037 urb->status = -EPROTO; /* XactErr */ 1038 else 1039 urb->status = -EPROTO; /* Unknown */ 1040 /* 1041 dev_dbg(hcd->self.controller, "%s: ptd error:\n" 1042 " dw0: %08x dw1: %08x dw2: %08x dw3: %08x\n" 1043 " dw4: %08x dw5: %08x dw6: %08x dw7: %08x\n", 1044 __func__, 1045 ptd->dw0, ptd->dw1, ptd->dw2, ptd->dw3, 1046 ptd->dw4, ptd->dw5, ptd->dw6, ptd->dw7); 1047 */ 1048 return PTD_STATE_URB_RETIRE; 1049 } 1050 1051 if ((ptd->dw3 & DW3_ERROR_BIT) && (ptd->dw3 & DW3_ACTIVE_BIT)) { 1052 /* Transfer Error, *but* active and no HALT -> reload */ 1053 dev_dbg(hcd->self.controller, "PID error; reloading ptd\n"); 1054 return PTD_STATE_QTD_RELOAD; 1055 } 1056 1057 if (!FROM_DW3_NAKCOUNT(ptd->dw3) && (ptd->dw3 & DW3_ACTIVE_BIT)) { 1058 /* 1059 * NAKs are handled in HW by the chip. Usually if the 1060 * device is not able to send data fast enough. 1061 * This happens mostly on slower hardware. 1062 */ 1063 return PTD_STATE_QTD_RELOAD; 1064 } 1065 1066 return PTD_STATE_QTD_DONE; 1067 } 1068 1069 static void handle_done_ptds(struct usb_hcd *hcd) 1070 { 1071 struct isp1760_hcd *priv = hcd_to_priv(hcd); 1072 struct ptd ptd; 1073 struct isp1760_qh *qh; 1074 int slot; 1075 int state; 1076 struct isp1760_slotinfo *slots; 1077 u32 ptd_offset; 1078 struct isp1760_qtd *qtd; 1079 int modified; 1080 int skip_map; 1081 1082 skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); 1083 priv->int_done_map &= ~skip_map; 1084 skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); 1085 priv->atl_done_map &= ~skip_map; 1086 1087 modified = priv->int_done_map || priv->atl_done_map; 1088 1089 while (priv->int_done_map || priv->atl_done_map) { 1090 if (priv->int_done_map) { 1091 /* INT ptd */ 1092 slot = __ffs(priv->int_done_map); 1093 priv->int_done_map &= ~(1 << slot); 1094 slots = priv->int_slots; 1095 /* This should not trigger, and could be removed if 1096 noone have any problems with it triggering: */ 1097 if (!slots[slot].qh) { 1098 WARN_ON(1); 1099 continue; 1100 } 1101 ptd_offset = INT_PTD_OFFSET; 1102 ptd_read(hcd->regs, INT_PTD_OFFSET, slot, &ptd); 1103 state = check_int_transfer(hcd, &ptd, 1104 slots[slot].qtd->urb); 1105 } else { 1106 /* ATL ptd */ 1107 slot = __ffs(priv->atl_done_map); 1108 priv->atl_done_map &= ~(1 << slot); 1109 slots = priv->atl_slots; 1110 /* This should not trigger, and could be removed if 1111 noone have any problems with it triggering: */ 1112 if (!slots[slot].qh) { 1113 WARN_ON(1); 1114 continue; 1115 } 1116 ptd_offset = ATL_PTD_OFFSET; 1117 ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd); 1118 state = check_atl_transfer(hcd, &ptd, 1119 slots[slot].qtd->urb); 1120 } 1121 1122 qtd = slots[slot].qtd; 1123 slots[slot].qtd = NULL; 1124 qh = slots[slot].qh; 1125 slots[slot].qh = NULL; 1126 qh->slot = -1; 1127 1128 WARN_ON(qtd->status != QTD_XFER_STARTED); 1129 1130 switch (state) { 1131 case PTD_STATE_QTD_DONE: 1132 if ((usb_pipeint(qtd->urb->pipe)) && 1133 (qtd->urb->dev->speed != USB_SPEED_HIGH)) 1134 qtd->actual_length = 1135 FROM_DW3_SCS_NRBYTESTRANSFERRED(ptd.dw3); 1136 else 1137 qtd->actual_length = 1138 FROM_DW3_NRBYTESTRANSFERRED(ptd.dw3); 1139 1140 qtd->status = QTD_XFER_COMPLETE; 1141 if (list_is_last(&qtd->qtd_list, &qh->qtd_list) || 1142 is_short_bulk(qtd)) 1143 qtd = NULL; 1144 else 1145 qtd = list_entry(qtd->qtd_list.next, 1146 typeof(*qtd), qtd_list); 1147 1148 qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3); 1149 qh->ping = FROM_DW3_PING(ptd.dw3); 1150 break; 1151 1152 case PTD_STATE_QTD_RELOAD: /* QTD_RETRY, for atls only */ 1153 qtd->status = QTD_PAYLOAD_ALLOC; 1154 ptd.dw0 |= DW0_VALID_BIT; 1155 /* RL counter = ERR counter */ 1156 ptd.dw3 &= ~TO_DW3_NAKCOUNT(0xf); 1157 ptd.dw3 |= TO_DW3_NAKCOUNT(FROM_DW2_RL(ptd.dw2)); 1158 ptd.dw3 &= ~TO_DW3_CERR(3); 1159 ptd.dw3 |= TO_DW3_CERR(ERR_COUNTER); 1160 qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3); 1161 qh->ping = FROM_DW3_PING(ptd.dw3); 1162 break; 1163 1164 case PTD_STATE_URB_RETIRE: 1165 qtd->status = QTD_RETIRE; 1166 if ((qtd->urb->dev->speed != USB_SPEED_HIGH) && 1167 (qtd->urb->status != -EPIPE) && 1168 (qtd->urb->status != -EREMOTEIO)) { 1169 qh->tt_buffer_dirty = 1; 1170 if (usb_hub_clear_tt_buffer(qtd->urb)) 1171 /* Clear failed; let's hope things work 1172 anyway */ 1173 qh->tt_buffer_dirty = 0; 1174 } 1175 qtd = NULL; 1176 qh->toggle = 0; 1177 qh->ping = 0; 1178 break; 1179 1180 default: 1181 WARN_ON(1); 1182 continue; 1183 } 1184 1185 if (qtd && (qtd->status == QTD_PAYLOAD_ALLOC)) { 1186 if (slots == priv->int_slots) { 1187 if (state == PTD_STATE_QTD_RELOAD) 1188 dev_err(hcd->self.controller, 1189 "%s: PTD_STATE_QTD_RELOAD on " 1190 "interrupt packet\n", __func__); 1191 if (state != PTD_STATE_QTD_RELOAD) 1192 create_ptd_int(qh, qtd, &ptd); 1193 } else { 1194 if (state != PTD_STATE_QTD_RELOAD) 1195 create_ptd_atl(qh, qtd, &ptd); 1196 } 1197 1198 start_bus_transfer(hcd, ptd_offset, slot, slots, qtd, 1199 qh, &ptd); 1200 } 1201 } 1202 1203 if (modified) 1204 schedule_ptds(hcd); 1205 } 1206 1207 static irqreturn_t isp1760_irq(struct usb_hcd *hcd) 1208 { 1209 struct isp1760_hcd *priv = hcd_to_priv(hcd); 1210 u32 imask; 1211 irqreturn_t irqret = IRQ_NONE; 1212 1213 spin_lock(&priv->lock); 1214 1215 if (!(hcd->state & HC_STATE_RUNNING)) 1216 goto leave; 1217 1218 imask = reg_read32(hcd->regs, HC_INTERRUPT_REG); 1219 if (unlikely(!imask)) 1220 goto leave; 1221 reg_write32(hcd->regs, HC_INTERRUPT_REG, imask); /* Clear */ 1222 1223 priv->int_done_map |= reg_read32(hcd->regs, HC_INT_PTD_DONEMAP_REG); 1224 priv->atl_done_map |= reg_read32(hcd->regs, HC_ATL_PTD_DONEMAP_REG); 1225 1226 handle_done_ptds(hcd); 1227 1228 irqret = IRQ_HANDLED; 1229 leave: 1230 spin_unlock(&priv->lock); 1231 1232 return irqret; 1233 } 1234 1235 /* 1236 * Workaround for problem described in chip errata 2: 1237 * 1238 * Sometimes interrupts are not generated when ATL (not INT?) completion occurs. 1239 * One solution suggested in the errata is to use SOF interrupts _instead_of_ 1240 * ATL done interrupts (the "instead of" might be important since it seems 1241 * enabling ATL interrupts also causes the chip to sometimes - rarely - "forget" 1242 * to set the PTD's done bit in addition to not generating an interrupt!). 1243 * 1244 * So if we use SOF + ATL interrupts, we sometimes get stale PTDs since their 1245 * done bit is not being set. This is bad - it blocks the endpoint until reboot. 1246 * 1247 * If we use SOF interrupts only, we get latency between ptd completion and the 1248 * actual handling. This is very noticeable in testusb runs which takes several 1249 * minutes longer without ATL interrupts. 1250 * 1251 * A better solution is to run the code below every SLOT_CHECK_PERIOD ms. If it 1252 * finds active ATL slots which are older than SLOT_TIMEOUT ms, it checks the 1253 * slot's ACTIVE and VALID bits. If these are not set, the ptd is considered 1254 * completed and its done map bit is set. 1255 * 1256 * The values of SLOT_TIMEOUT and SLOT_CHECK_PERIOD have been arbitrarily chosen 1257 * not to cause too much lag when this HW bug occurs, while still hopefully 1258 * ensuring that the check does not falsely trigger. 1259 */ 1260 #define SLOT_TIMEOUT 300 1261 #define SLOT_CHECK_PERIOD 200 1262 static struct timer_list errata2_timer; 1263 1264 static void errata2_function(unsigned long data) 1265 { 1266 struct usb_hcd *hcd = (struct usb_hcd *) data; 1267 struct isp1760_hcd *priv = hcd_to_priv(hcd); 1268 int slot; 1269 struct ptd ptd; 1270 unsigned long spinflags; 1271 1272 spin_lock_irqsave(&priv->lock, spinflags); 1273 1274 for (slot = 0; slot < 32; slot++) 1275 if (priv->atl_slots[slot].qh && time_after(jiffies, 1276 priv->atl_slots[slot].timestamp + 1277 SLOT_TIMEOUT * HZ / 1000)) { 1278 ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd); 1279 if (!FROM_DW0_VALID(ptd.dw0) && 1280 !FROM_DW3_ACTIVE(ptd.dw3)) 1281 priv->atl_done_map |= 1 << slot; 1282 } 1283 1284 if (priv->atl_done_map) 1285 handle_done_ptds(hcd); 1286 1287 spin_unlock_irqrestore(&priv->lock, spinflags); 1288 1289 errata2_timer.expires = jiffies + SLOT_CHECK_PERIOD * HZ / 1000; 1290 add_timer(&errata2_timer); 1291 } 1292 1293 static int isp1760_run(struct usb_hcd *hcd) 1294 { 1295 int retval; 1296 u32 temp; 1297 u32 command; 1298 u32 chipid; 1299 1300 hcd->uses_new_polling = 1; 1301 1302 hcd->state = HC_STATE_RUNNING; 1303 1304 /* Set PTD interrupt AND & OR maps */ 1305 reg_write32(hcd->regs, HC_ATL_IRQ_MASK_AND_REG, 0); 1306 reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, 0xffffffff); 1307 reg_write32(hcd->regs, HC_INT_IRQ_MASK_AND_REG, 0); 1308 reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, 0xffffffff); 1309 reg_write32(hcd->regs, HC_ISO_IRQ_MASK_AND_REG, 0); 1310 reg_write32(hcd->regs, HC_ISO_IRQ_MASK_OR_REG, 0xffffffff); 1311 /* step 23 passed */ 1312 1313 temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL); 1314 reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp | HW_GLOBAL_INTR_EN); 1315 1316 command = reg_read32(hcd->regs, HC_USBCMD); 1317 command &= ~(CMD_LRESET|CMD_RESET); 1318 command |= CMD_RUN; 1319 reg_write32(hcd->regs, HC_USBCMD, command); 1320 1321 retval = handshake(hcd, HC_USBCMD, CMD_RUN, CMD_RUN, 250 * 1000); 1322 if (retval) 1323 return retval; 1324 1325 /* 1326 * XXX 1327 * Spec says to write FLAG_CF as last config action, priv code grabs 1328 * the semaphore while doing so. 1329 */ 1330 down_write(&ehci_cf_port_reset_rwsem); 1331 reg_write32(hcd->regs, HC_CONFIGFLAG, FLAG_CF); 1332 1333 retval = handshake(hcd, HC_CONFIGFLAG, FLAG_CF, FLAG_CF, 250 * 1000); 1334 up_write(&ehci_cf_port_reset_rwsem); 1335 if (retval) 1336 return retval; 1337 1338 setup_timer(&errata2_timer, errata2_function, (unsigned long)hcd); 1339 errata2_timer.expires = jiffies + SLOT_CHECK_PERIOD * HZ / 1000; 1340 add_timer(&errata2_timer); 1341 1342 chipid = reg_read32(hcd->regs, HC_CHIP_ID_REG); 1343 dev_info(hcd->self.controller, "USB ISP %04x HW rev. %d started\n", 1344 chipid & 0xffff, chipid >> 16); 1345 1346 /* PTD Register Init Part 2, Step 28 */ 1347 1348 /* Setup registers controlling PTD checking */ 1349 reg_write32(hcd->regs, HC_ATL_PTD_LASTPTD_REG, 0x80000000); 1350 reg_write32(hcd->regs, HC_INT_PTD_LASTPTD_REG, 0x80000000); 1351 reg_write32(hcd->regs, HC_ISO_PTD_LASTPTD_REG, 0x00000001); 1352 reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, 0xffffffff); 1353 reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, 0xffffffff); 1354 reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, 0xffffffff); 1355 reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, 1356 ATL_BUF_FILL | INT_BUF_FILL); 1357 1358 /* GRR this is run-once init(), being done every time the HC starts. 1359 * So long as they're part of class devices, we can't do it init() 1360 * since the class device isn't created that early. 1361 */ 1362 return 0; 1363 } 1364 1365 static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len) 1366 { 1367 qtd->data_buffer = databuffer; 1368 1369 if (len > MAX_PAYLOAD_SIZE) 1370 len = MAX_PAYLOAD_SIZE; 1371 qtd->length = len; 1372 1373 return qtd->length; 1374 } 1375 1376 static void qtd_list_free(struct list_head *qtd_list) 1377 { 1378 struct isp1760_qtd *qtd, *qtd_next; 1379 1380 list_for_each_entry_safe(qtd, qtd_next, qtd_list, qtd_list) { 1381 list_del(&qtd->qtd_list); 1382 qtd_free(qtd); 1383 } 1384 } 1385 1386 /* 1387 * Packetize urb->transfer_buffer into list of packets of size wMaxPacketSize. 1388 * Also calculate the PID type (SETUP/IN/OUT) for each packet. 1389 */ 1390 #define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff) 1391 static void packetize_urb(struct usb_hcd *hcd, 1392 struct urb *urb, struct list_head *head, gfp_t flags) 1393 { 1394 struct isp1760_qtd *qtd; 1395 void *buf; 1396 int len, maxpacketsize; 1397 u8 packet_type; 1398 1399 /* 1400 * URBs map to sequences of QTDs: one logical transaction 1401 */ 1402 1403 if (!urb->transfer_buffer && urb->transfer_buffer_length) { 1404 /* XXX This looks like usb storage / SCSI bug */ 1405 dev_err(hcd->self.controller, 1406 "buf is null, dma is %08lx len is %d\n", 1407 (long unsigned)urb->transfer_dma, 1408 urb->transfer_buffer_length); 1409 WARN_ON(1); 1410 } 1411 1412 if (usb_pipein(urb->pipe)) 1413 packet_type = IN_PID; 1414 else 1415 packet_type = OUT_PID; 1416 1417 if (usb_pipecontrol(urb->pipe)) { 1418 qtd = qtd_alloc(flags, urb, SETUP_PID); 1419 if (!qtd) 1420 goto cleanup; 1421 qtd_fill(qtd, urb->setup_packet, sizeof(struct usb_ctrlrequest)); 1422 list_add_tail(&qtd->qtd_list, head); 1423 1424 /* for zero length DATA stages, STATUS is always IN */ 1425 if (urb->transfer_buffer_length == 0) 1426 packet_type = IN_PID; 1427 } 1428 1429 maxpacketsize = max_packet(usb_maxpacket(urb->dev, urb->pipe, 1430 usb_pipeout(urb->pipe))); 1431 1432 /* 1433 * buffer gets wrapped in one or more qtds; 1434 * last one may be "short" (including zero len) 1435 * and may serve as a control status ack 1436 */ 1437 buf = urb->transfer_buffer; 1438 len = urb->transfer_buffer_length; 1439 1440 for (;;) { 1441 int this_qtd_len; 1442 1443 qtd = qtd_alloc(flags, urb, packet_type); 1444 if (!qtd) 1445 goto cleanup; 1446 this_qtd_len = qtd_fill(qtd, buf, len); 1447 list_add_tail(&qtd->qtd_list, head); 1448 1449 len -= this_qtd_len; 1450 buf += this_qtd_len; 1451 1452 if (len <= 0) 1453 break; 1454 } 1455 1456 /* 1457 * control requests may need a terminating data "status" ack; 1458 * bulk ones may need a terminating short packet (zero length). 1459 */ 1460 if (urb->transfer_buffer_length != 0) { 1461 int one_more = 0; 1462 1463 if (usb_pipecontrol(urb->pipe)) { 1464 one_more = 1; 1465 if (packet_type == IN_PID) 1466 packet_type = OUT_PID; 1467 else 1468 packet_type = IN_PID; 1469 } else if (usb_pipebulk(urb->pipe) 1470 && (urb->transfer_flags & URB_ZERO_PACKET) 1471 && !(urb->transfer_buffer_length % 1472 maxpacketsize)) { 1473 one_more = 1; 1474 } 1475 if (one_more) { 1476 qtd = qtd_alloc(flags, urb, packet_type); 1477 if (!qtd) 1478 goto cleanup; 1479 1480 /* never any data in such packets */ 1481 qtd_fill(qtd, NULL, 0); 1482 list_add_tail(&qtd->qtd_list, head); 1483 } 1484 } 1485 1486 return; 1487 1488 cleanup: 1489 qtd_list_free(head); 1490 } 1491 1492 static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, 1493 gfp_t mem_flags) 1494 { 1495 struct isp1760_hcd *priv = hcd_to_priv(hcd); 1496 struct list_head *ep_queue; 1497 struct isp1760_qh *qh, *qhit; 1498 unsigned long spinflags; 1499 LIST_HEAD(new_qtds); 1500 int retval; 1501 int qh_in_queue; 1502 1503 switch (usb_pipetype(urb->pipe)) { 1504 case PIPE_CONTROL: 1505 ep_queue = &priv->qh_list[QH_CONTROL]; 1506 break; 1507 case PIPE_BULK: 1508 ep_queue = &priv->qh_list[QH_BULK]; 1509 break; 1510 case PIPE_INTERRUPT: 1511 if (urb->interval < 0) 1512 return -EINVAL; 1513 /* FIXME: Check bandwidth */ 1514 ep_queue = &priv->qh_list[QH_INTERRUPT]; 1515 break; 1516 case PIPE_ISOCHRONOUS: 1517 dev_err(hcd->self.controller, "%s: isochronous USB packets " 1518 "not yet supported\n", 1519 __func__); 1520 return -EPIPE; 1521 default: 1522 dev_err(hcd->self.controller, "%s: unknown pipe type\n", 1523 __func__); 1524 return -EPIPE; 1525 } 1526 1527 if (usb_pipein(urb->pipe)) 1528 urb->actual_length = 0; 1529 1530 packetize_urb(hcd, urb, &new_qtds, mem_flags); 1531 if (list_empty(&new_qtds)) 1532 return -ENOMEM; 1533 1534 retval = 0; 1535 spin_lock_irqsave(&priv->lock, spinflags); 1536 1537 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { 1538 retval = -ESHUTDOWN; 1539 qtd_list_free(&new_qtds); 1540 goto out; 1541 } 1542 retval = usb_hcd_link_urb_to_ep(hcd, urb); 1543 if (retval) { 1544 qtd_list_free(&new_qtds); 1545 goto out; 1546 } 1547 1548 qh = urb->ep->hcpriv; 1549 if (qh) { 1550 qh_in_queue = 0; 1551 list_for_each_entry(qhit, ep_queue, qh_list) { 1552 if (qhit == qh) { 1553 qh_in_queue = 1; 1554 break; 1555 } 1556 } 1557 if (!qh_in_queue) 1558 list_add_tail(&qh->qh_list, ep_queue); 1559 } else { 1560 qh = qh_alloc(GFP_ATOMIC); 1561 if (!qh) { 1562 retval = -ENOMEM; 1563 usb_hcd_unlink_urb_from_ep(hcd, urb); 1564 qtd_list_free(&new_qtds); 1565 goto out; 1566 } 1567 list_add_tail(&qh->qh_list, ep_queue); 1568 urb->ep->hcpriv = qh; 1569 } 1570 1571 list_splice_tail(&new_qtds, &qh->qtd_list); 1572 schedule_ptds(hcd); 1573 1574 out: 1575 spin_unlock_irqrestore(&priv->lock, spinflags); 1576 return retval; 1577 } 1578 1579 static void kill_transfer(struct usb_hcd *hcd, struct urb *urb, 1580 struct isp1760_qh *qh) 1581 { 1582 struct isp1760_hcd *priv = hcd_to_priv(hcd); 1583 int skip_map; 1584 1585 WARN_ON(qh->slot == -1); 1586 1587 /* We need to forcefully reclaim the slot since some transfers never 1588 return, e.g. interrupt transfers and NAKed bulk transfers. */ 1589 if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe)) { 1590 skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); 1591 skip_map |= (1 << qh->slot); 1592 reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map); 1593 priv->atl_slots[qh->slot].qh = NULL; 1594 priv->atl_slots[qh->slot].qtd = NULL; 1595 } else { 1596 skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); 1597 skip_map |= (1 << qh->slot); 1598 reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map); 1599 priv->int_slots[qh->slot].qh = NULL; 1600 priv->int_slots[qh->slot].qtd = NULL; 1601 } 1602 1603 qh->slot = -1; 1604 } 1605 1606 /* 1607 * Retire the qtds beginning at 'qtd' and belonging all to the same urb, killing 1608 * any active transfer belonging to the urb in the process. 1609 */ 1610 static void dequeue_urb_from_qtd(struct usb_hcd *hcd, struct isp1760_qh *qh, 1611 struct isp1760_qtd *qtd) 1612 { 1613 struct urb *urb; 1614 int urb_was_running; 1615 1616 urb = qtd->urb; 1617 urb_was_running = 0; 1618 list_for_each_entry_from(qtd, &qh->qtd_list, qtd_list) { 1619 if (qtd->urb != urb) 1620 break; 1621 1622 if (qtd->status >= QTD_XFER_STARTED) 1623 urb_was_running = 1; 1624 if (last_qtd_of_urb(qtd, qh) && 1625 (qtd->status >= QTD_XFER_COMPLETE)) 1626 urb_was_running = 0; 1627 1628 if (qtd->status == QTD_XFER_STARTED) 1629 kill_transfer(hcd, urb, qh); 1630 qtd->status = QTD_RETIRE; 1631 } 1632 1633 if ((urb->dev->speed != USB_SPEED_HIGH) && urb_was_running) { 1634 qh->tt_buffer_dirty = 1; 1635 if (usb_hub_clear_tt_buffer(urb)) 1636 /* Clear failed; let's hope things work anyway */ 1637 qh->tt_buffer_dirty = 0; 1638 } 1639 } 1640 1641 static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, 1642 int status) 1643 { 1644 struct isp1760_hcd *priv = hcd_to_priv(hcd); 1645 unsigned long spinflags; 1646 struct isp1760_qh *qh; 1647 struct isp1760_qtd *qtd; 1648 int retval = 0; 1649 1650 spin_lock_irqsave(&priv->lock, spinflags); 1651 retval = usb_hcd_check_unlink_urb(hcd, urb, status); 1652 if (retval) 1653 goto out; 1654 1655 qh = urb->ep->hcpriv; 1656 if (!qh) { 1657 retval = -EINVAL; 1658 goto out; 1659 } 1660 1661 list_for_each_entry(qtd, &qh->qtd_list, qtd_list) 1662 if (qtd->urb == urb) { 1663 dequeue_urb_from_qtd(hcd, qh, qtd); 1664 list_move(&qtd->qtd_list, &qh->qtd_list); 1665 break; 1666 } 1667 1668 urb->status = status; 1669 schedule_ptds(hcd); 1670 1671 out: 1672 spin_unlock_irqrestore(&priv->lock, spinflags); 1673 return retval; 1674 } 1675 1676 static void isp1760_endpoint_disable(struct usb_hcd *hcd, 1677 struct usb_host_endpoint *ep) 1678 { 1679 struct isp1760_hcd *priv = hcd_to_priv(hcd); 1680 unsigned long spinflags; 1681 struct isp1760_qh *qh, *qh_iter; 1682 int i; 1683 1684 spin_lock_irqsave(&priv->lock, spinflags); 1685 1686 qh = ep->hcpriv; 1687 if (!qh) 1688 goto out; 1689 1690 WARN_ON(!list_empty(&qh->qtd_list)); 1691 1692 for (i = 0; i < QH_END; i++) 1693 list_for_each_entry(qh_iter, &priv->qh_list[i], qh_list) 1694 if (qh_iter == qh) { 1695 list_del(&qh_iter->qh_list); 1696 i = QH_END; 1697 break; 1698 } 1699 qh_free(qh); 1700 ep->hcpriv = NULL; 1701 1702 schedule_ptds(hcd); 1703 1704 out: 1705 spin_unlock_irqrestore(&priv->lock, spinflags); 1706 } 1707 1708 static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf) 1709 { 1710 struct isp1760_hcd *priv = hcd_to_priv(hcd); 1711 u32 temp, status = 0; 1712 u32 mask; 1713 int retval = 1; 1714 unsigned long flags; 1715 1716 /* if !PM, root hub timers won't get shut down ... */ 1717 if (!HC_IS_RUNNING(hcd->state)) 1718 return 0; 1719 1720 /* init status to no-changes */ 1721 buf[0] = 0; 1722 mask = PORT_CSC; 1723 1724 spin_lock_irqsave(&priv->lock, flags); 1725 temp = reg_read32(hcd->regs, HC_PORTSC1); 1726 1727 if (temp & PORT_OWNER) { 1728 if (temp & PORT_CSC) { 1729 temp &= ~PORT_CSC; 1730 reg_write32(hcd->regs, HC_PORTSC1, temp); 1731 goto done; 1732 } 1733 } 1734 1735 /* 1736 * Return status information even for ports with OWNER set. 1737 * Otherwise hub_wq wouldn't see the disconnect event when a 1738 * high-speed device is switched over to the companion 1739 * controller by the user. 1740 */ 1741 1742 if ((temp & mask) != 0 1743 || ((temp & PORT_RESUME) != 0 1744 && time_after_eq(jiffies, 1745 priv->reset_done))) { 1746 buf [0] |= 1 << (0 + 1); 1747 status = STS_PCD; 1748 } 1749 /* FIXME autosuspend idle root hubs */ 1750 done: 1751 spin_unlock_irqrestore(&priv->lock, flags); 1752 return status ? retval : 0; 1753 } 1754 1755 static void isp1760_hub_descriptor(struct isp1760_hcd *priv, 1756 struct usb_hub_descriptor *desc) 1757 { 1758 int ports = HCS_N_PORTS(priv->hcs_params); 1759 u16 temp; 1760 1761 desc->bDescriptorType = 0x29; 1762 /* priv 1.0, 2.3.9 says 20ms max */ 1763 desc->bPwrOn2PwrGood = 10; 1764 desc->bHubContrCurrent = 0; 1765 1766 desc->bNbrPorts = ports; 1767 temp = 1 + (ports / 8); 1768 desc->bDescLength = 7 + 2 * temp; 1769 1770 /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */ 1771 memset(&desc->u.hs.DeviceRemovable[0], 0, temp); 1772 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); 1773 1774 /* per-port overcurrent reporting */ 1775 temp = HUB_CHAR_INDV_PORT_OCPM; 1776 if (HCS_PPC(priv->hcs_params)) 1777 /* per-port power control */ 1778 temp |= HUB_CHAR_INDV_PORT_LPSM; 1779 else 1780 /* no power switching */ 1781 temp |= HUB_CHAR_NO_LPSM; 1782 desc->wHubCharacteristics = cpu_to_le16(temp); 1783 } 1784 1785 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) 1786 1787 static int check_reset_complete(struct usb_hcd *hcd, int index, 1788 int port_status) 1789 { 1790 if (!(port_status & PORT_CONNECT)) 1791 return port_status; 1792 1793 /* if reset finished and it's still not enabled -- handoff */ 1794 if (!(port_status & PORT_PE)) { 1795 1796 dev_info(hcd->self.controller, 1797 "port %d full speed --> companion\n", 1798 index + 1); 1799 1800 port_status |= PORT_OWNER; 1801 port_status &= ~PORT_RWC_BITS; 1802 reg_write32(hcd->regs, HC_PORTSC1, port_status); 1803 1804 } else 1805 dev_info(hcd->self.controller, "port %d high speed\n", 1806 index + 1); 1807 1808 return port_status; 1809 } 1810 1811 static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq, 1812 u16 wValue, u16 wIndex, char *buf, u16 wLength) 1813 { 1814 struct isp1760_hcd *priv = hcd_to_priv(hcd); 1815 int ports = HCS_N_PORTS(priv->hcs_params); 1816 u32 temp, status; 1817 unsigned long flags; 1818 int retval = 0; 1819 unsigned selector; 1820 1821 /* 1822 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. 1823 * HCS_INDICATOR may say we can change LEDs to off/amber/green. 1824 * (track current state ourselves) ... blink for diagnostics, 1825 * power, "this is the one", etc. EHCI spec supports this. 1826 */ 1827 1828 spin_lock_irqsave(&priv->lock, flags); 1829 switch (typeReq) { 1830 case ClearHubFeature: 1831 switch (wValue) { 1832 case C_HUB_LOCAL_POWER: 1833 case C_HUB_OVER_CURRENT: 1834 /* no hub-wide feature/status flags */ 1835 break; 1836 default: 1837 goto error; 1838 } 1839 break; 1840 case ClearPortFeature: 1841 if (!wIndex || wIndex > ports) 1842 goto error; 1843 wIndex--; 1844 temp = reg_read32(hcd->regs, HC_PORTSC1); 1845 1846 /* 1847 * Even if OWNER is set, so the port is owned by the 1848 * companion controller, hub_wq needs to be able to clear 1849 * the port-change status bits (especially 1850 * USB_PORT_STAT_C_CONNECTION). 1851 */ 1852 1853 switch (wValue) { 1854 case USB_PORT_FEAT_ENABLE: 1855 reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_PE); 1856 break; 1857 case USB_PORT_FEAT_C_ENABLE: 1858 /* XXX error? */ 1859 break; 1860 case USB_PORT_FEAT_SUSPEND: 1861 if (temp & PORT_RESET) 1862 goto error; 1863 1864 if (temp & PORT_SUSPEND) { 1865 if ((temp & PORT_PE) == 0) 1866 goto error; 1867 /* resume signaling for 20 msec */ 1868 temp &= ~(PORT_RWC_BITS); 1869 reg_write32(hcd->regs, HC_PORTSC1, 1870 temp | PORT_RESUME); 1871 priv->reset_done = jiffies + 1872 msecs_to_jiffies(20); 1873 } 1874 break; 1875 case USB_PORT_FEAT_C_SUSPEND: 1876 /* we auto-clear this feature */ 1877 break; 1878 case USB_PORT_FEAT_POWER: 1879 if (HCS_PPC(priv->hcs_params)) 1880 reg_write32(hcd->regs, HC_PORTSC1, 1881 temp & ~PORT_POWER); 1882 break; 1883 case USB_PORT_FEAT_C_CONNECTION: 1884 reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_CSC); 1885 break; 1886 case USB_PORT_FEAT_C_OVER_CURRENT: 1887 /* XXX error ?*/ 1888 break; 1889 case USB_PORT_FEAT_C_RESET: 1890 /* GetPortStatus clears reset */ 1891 break; 1892 default: 1893 goto error; 1894 } 1895 reg_read32(hcd->regs, HC_USBCMD); 1896 break; 1897 case GetHubDescriptor: 1898 isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *) 1899 buf); 1900 break; 1901 case GetHubStatus: 1902 /* no hub-wide feature/status flags */ 1903 memset(buf, 0, 4); 1904 break; 1905 case GetPortStatus: 1906 if (!wIndex || wIndex > ports) 1907 goto error; 1908 wIndex--; 1909 status = 0; 1910 temp = reg_read32(hcd->regs, HC_PORTSC1); 1911 1912 /* wPortChange bits */ 1913 if (temp & PORT_CSC) 1914 status |= USB_PORT_STAT_C_CONNECTION << 16; 1915 1916 1917 /* whoever resumes must GetPortStatus to complete it!! */ 1918 if (temp & PORT_RESUME) { 1919 dev_err(hcd->self.controller, "Port resume should be skipped.\n"); 1920 1921 /* Remote Wakeup received? */ 1922 if (!priv->reset_done) { 1923 /* resume signaling for 20 msec */ 1924 priv->reset_done = jiffies 1925 + msecs_to_jiffies(20); 1926 /* check the port again */ 1927 mod_timer(&hcd->rh_timer, priv->reset_done); 1928 } 1929 1930 /* resume completed? */ 1931 else if (time_after_eq(jiffies, 1932 priv->reset_done)) { 1933 status |= USB_PORT_STAT_C_SUSPEND << 16; 1934 priv->reset_done = 0; 1935 1936 /* stop resume signaling */ 1937 temp = reg_read32(hcd->regs, HC_PORTSC1); 1938 reg_write32(hcd->regs, HC_PORTSC1, 1939 temp & ~(PORT_RWC_BITS | PORT_RESUME)); 1940 retval = handshake(hcd, HC_PORTSC1, 1941 PORT_RESUME, 0, 2000 /* 2msec */); 1942 if (retval != 0) { 1943 dev_err(hcd->self.controller, 1944 "port %d resume error %d\n", 1945 wIndex + 1, retval); 1946 goto error; 1947 } 1948 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); 1949 } 1950 } 1951 1952 /* whoever resets must GetPortStatus to complete it!! */ 1953 if ((temp & PORT_RESET) 1954 && time_after_eq(jiffies, 1955 priv->reset_done)) { 1956 status |= USB_PORT_STAT_C_RESET << 16; 1957 priv->reset_done = 0; 1958 1959 /* force reset to complete */ 1960 reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_RESET); 1961 /* REVISIT: some hardware needs 550+ usec to clear 1962 * this bit; seems too long to spin routinely... 1963 */ 1964 retval = handshake(hcd, HC_PORTSC1, 1965 PORT_RESET, 0, 750); 1966 if (retval != 0) { 1967 dev_err(hcd->self.controller, "port %d reset error %d\n", 1968 wIndex + 1, retval); 1969 goto error; 1970 } 1971 1972 /* see what we found out */ 1973 temp = check_reset_complete(hcd, wIndex, 1974 reg_read32(hcd->regs, HC_PORTSC1)); 1975 } 1976 /* 1977 * Even if OWNER is set, there's no harm letting hub_wq 1978 * see the wPortStatus values (they should all be 0 except 1979 * for PORT_POWER anyway). 1980 */ 1981 1982 if (temp & PORT_OWNER) 1983 dev_err(hcd->self.controller, "PORT_OWNER is set\n"); 1984 1985 if (temp & PORT_CONNECT) { 1986 status |= USB_PORT_STAT_CONNECTION; 1987 /* status may be from integrated TT */ 1988 status |= USB_PORT_STAT_HIGH_SPEED; 1989 } 1990 if (temp & PORT_PE) 1991 status |= USB_PORT_STAT_ENABLE; 1992 if (temp & (PORT_SUSPEND|PORT_RESUME)) 1993 status |= USB_PORT_STAT_SUSPEND; 1994 if (temp & PORT_RESET) 1995 status |= USB_PORT_STAT_RESET; 1996 if (temp & PORT_POWER) 1997 status |= USB_PORT_STAT_POWER; 1998 1999 put_unaligned(cpu_to_le32(status), (__le32 *) buf); 2000 break; 2001 case SetHubFeature: 2002 switch (wValue) { 2003 case C_HUB_LOCAL_POWER: 2004 case C_HUB_OVER_CURRENT: 2005 /* no hub-wide feature/status flags */ 2006 break; 2007 default: 2008 goto error; 2009 } 2010 break; 2011 case SetPortFeature: 2012 selector = wIndex >> 8; 2013 wIndex &= 0xff; 2014 if (!wIndex || wIndex > ports) 2015 goto error; 2016 wIndex--; 2017 temp = reg_read32(hcd->regs, HC_PORTSC1); 2018 if (temp & PORT_OWNER) 2019 break; 2020 2021 /* temp &= ~PORT_RWC_BITS; */ 2022 switch (wValue) { 2023 case USB_PORT_FEAT_ENABLE: 2024 reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_PE); 2025 break; 2026 2027 case USB_PORT_FEAT_SUSPEND: 2028 if ((temp & PORT_PE) == 0 2029 || (temp & PORT_RESET) != 0) 2030 goto error; 2031 2032 reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_SUSPEND); 2033 break; 2034 case USB_PORT_FEAT_POWER: 2035 if (HCS_PPC(priv->hcs_params)) 2036 reg_write32(hcd->regs, HC_PORTSC1, 2037 temp | PORT_POWER); 2038 break; 2039 case USB_PORT_FEAT_RESET: 2040 if (temp & PORT_RESUME) 2041 goto error; 2042 /* line status bits may report this as low speed, 2043 * which can be fine if this root hub has a 2044 * transaction translator built in. 2045 */ 2046 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT 2047 && PORT_USB11(temp)) { 2048 temp |= PORT_OWNER; 2049 } else { 2050 temp |= PORT_RESET; 2051 temp &= ~PORT_PE; 2052 2053 /* 2054 * caller must wait, then call GetPortStatus 2055 * usb 2.0 spec says 50 ms resets on root 2056 */ 2057 priv->reset_done = jiffies + 2058 msecs_to_jiffies(50); 2059 } 2060 reg_write32(hcd->regs, HC_PORTSC1, temp); 2061 break; 2062 default: 2063 goto error; 2064 } 2065 reg_read32(hcd->regs, HC_USBCMD); 2066 break; 2067 2068 default: 2069 error: 2070 /* "stall" on error */ 2071 retval = -EPIPE; 2072 } 2073 spin_unlock_irqrestore(&priv->lock, flags); 2074 return retval; 2075 } 2076 2077 static int isp1760_get_frame(struct usb_hcd *hcd) 2078 { 2079 struct isp1760_hcd *priv = hcd_to_priv(hcd); 2080 u32 fr; 2081 2082 fr = reg_read32(hcd->regs, HC_FRINDEX); 2083 return (fr >> 3) % priv->periodic_size; 2084 } 2085 2086 static void isp1760_stop(struct usb_hcd *hcd) 2087 { 2088 struct isp1760_hcd *priv = hcd_to_priv(hcd); 2089 u32 temp; 2090 2091 del_timer(&errata2_timer); 2092 2093 isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1, 2094 NULL, 0); 2095 mdelay(20); 2096 2097 spin_lock_irq(&priv->lock); 2098 ehci_reset(hcd); 2099 /* Disable IRQ */ 2100 temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL); 2101 reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN); 2102 spin_unlock_irq(&priv->lock); 2103 2104 reg_write32(hcd->regs, HC_CONFIGFLAG, 0); 2105 } 2106 2107 static void isp1760_shutdown(struct usb_hcd *hcd) 2108 { 2109 u32 command, temp; 2110 2111 isp1760_stop(hcd); 2112 temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL); 2113 reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN); 2114 2115 command = reg_read32(hcd->regs, HC_USBCMD); 2116 command &= ~CMD_RUN; 2117 reg_write32(hcd->regs, HC_USBCMD, command); 2118 } 2119 2120 static void isp1760_clear_tt_buffer_complete(struct usb_hcd *hcd, 2121 struct usb_host_endpoint *ep) 2122 { 2123 struct isp1760_hcd *priv = hcd_to_priv(hcd); 2124 struct isp1760_qh *qh = ep->hcpriv; 2125 unsigned long spinflags; 2126 2127 if (!qh) 2128 return; 2129 2130 spin_lock_irqsave(&priv->lock, spinflags); 2131 qh->tt_buffer_dirty = 0; 2132 schedule_ptds(hcd); 2133 spin_unlock_irqrestore(&priv->lock, spinflags); 2134 } 2135 2136 2137 static const struct hc_driver isp1760_hc_driver = { 2138 .description = "isp1760-hcd", 2139 .product_desc = "NXP ISP1760 USB Host Controller", 2140 .hcd_priv_size = sizeof(struct isp1760_hcd *), 2141 .irq = isp1760_irq, 2142 .flags = HCD_MEMORY | HCD_USB2, 2143 .reset = isp1760_hc_setup, 2144 .start = isp1760_run, 2145 .stop = isp1760_stop, 2146 .shutdown = isp1760_shutdown, 2147 .urb_enqueue = isp1760_urb_enqueue, 2148 .urb_dequeue = isp1760_urb_dequeue, 2149 .endpoint_disable = isp1760_endpoint_disable, 2150 .get_frame_number = isp1760_get_frame, 2151 .hub_status_data = isp1760_hub_status_data, 2152 .hub_control = isp1760_hub_control, 2153 .clear_tt_buffer_complete = isp1760_clear_tt_buffer_complete, 2154 }; 2155 2156 int __init isp1760_init_kmem_once(void) 2157 { 2158 urb_listitem_cachep = kmem_cache_create("isp1760_urb_listitem", 2159 sizeof(struct urb_listitem), 0, SLAB_TEMPORARY | 2160 SLAB_MEM_SPREAD, NULL); 2161 2162 if (!urb_listitem_cachep) 2163 return -ENOMEM; 2164 2165 qtd_cachep = kmem_cache_create("isp1760_qtd", 2166 sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY | 2167 SLAB_MEM_SPREAD, NULL); 2168 2169 if (!qtd_cachep) 2170 return -ENOMEM; 2171 2172 qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh), 2173 0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL); 2174 2175 if (!qh_cachep) { 2176 kmem_cache_destroy(qtd_cachep); 2177 return -ENOMEM; 2178 } 2179 2180 return 0; 2181 } 2182 2183 void isp1760_deinit_kmem_cache(void) 2184 { 2185 kmem_cache_destroy(qtd_cachep); 2186 kmem_cache_destroy(qh_cachep); 2187 kmem_cache_destroy(urb_listitem_cachep); 2188 } 2189 2190 int isp1760_hcd_register(struct isp1760_hcd *priv, void __iomem *regs, 2191 struct resource *mem, int irq, unsigned long irqflags, 2192 struct device *dev) 2193 { 2194 struct usb_hcd *hcd; 2195 int ret; 2196 2197 hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev)); 2198 if (!hcd) 2199 return -ENOMEM; 2200 2201 *(struct isp1760_hcd **)hcd->hcd_priv = priv; 2202 2203 priv->hcd = hcd; 2204 2205 init_memory(priv); 2206 2207 hcd->irq = irq; 2208 hcd->regs = regs; 2209 hcd->rsrc_start = mem->start; 2210 hcd->rsrc_len = resource_size(mem); 2211 2212 /* This driver doesn't support wakeup requests */ 2213 hcd->cant_recv_wakeups = 1; 2214 2215 ret = usb_add_hcd(hcd, irq, irqflags); 2216 if (ret) 2217 goto error; 2218 2219 device_wakeup_enable(hcd->self.controller); 2220 2221 return 0; 2222 2223 error: 2224 usb_put_hcd(hcd); 2225 return ret; 2226 } 2227 2228 void isp1760_hcd_unregister(struct isp1760_hcd *priv) 2229 { 2230 if (!priv->hcd) 2231 return; 2232 2233 usb_remove_hcd(priv->hcd); 2234 usb_put_hcd(priv->hcd); 2235 } 2236