git.oblomov.eu Git - linux-2.6/blob - drivers/usb/host/isp1760-hcd.c

   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  */
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/slab.h>
  15 #include <linux/list.h>
  16 #include <linux/usb.h>
  17 #include <linux/debugfs.h>
  18 #include <linux/uaccess.h>
  19 #include <linux/io.h>
  20 #include <asm/unaligned.h>
  21
  22 #include "../core/hcd.h"
  23 #include "isp1760-hcd.h"
  24
  25 static struct kmem_cache *qtd_cachep;
  26 static struct kmem_cache *qh_cachep;
  27
  28 struct isp1760_hcd {
  29         u32 hcs_params;
  30         spinlock_t              lock;
  31         struct inter_packet_info atl_ints[32];
  32         struct inter_packet_info int_ints[32];
  33         struct memory_chunk memory_pool[BLOCKS];
  34
  35         /* periodic schedule support */
  36 #define DEFAULT_I_TDPS          1024
  37         unsigned                periodic_size;
  38         unsigned                i_thresh;
  39         unsigned long           reset_done;
  40         unsigned long           next_statechange;
  41 };
  42
  43 static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
  44 {
  45         return (struct isp1760_hcd *) (hcd->hcd_priv);
  46 }
  47 static inline struct usb_hcd *priv_to_hcd(struct isp1760_hcd *priv)
  48 {
  49         return container_of((void *) priv, struct usb_hcd, hcd_priv);
  50 }
  51
  52 /* Section 2.2 Host Controller Capability Registers */
  53 #define HC_LENGTH(p)            (((p)>>00)&0x00ff)      /* bits 7:0 */
  54 #define HC_VERSION(p)           (((p)>>16)&0xffff)      /* bits 31:16 */
  55 #define HCS_INDICATOR(p)        ((p)&(1 << 16)) /* true: has port indicators */
  56 #define HCS_PPC(p)              ((p)&(1 << 4))  /* true: port power control */
  57 #define HCS_N_PORTS(p)          (((p)>>0)&0xf)  /* bits 3:0, ports on HC */
  58 #define HCC_ISOC_CACHE(p)       ((p)&(1 << 7))  /* true: can cache isoc frame */
  59 #define HCC_ISOC_THRES(p)       (((p)>>4)&0x7)  /* bits 6:4, uframes cached */
  60
  61 /* Section 2.3 Host Controller Operational Registers */
  62 #define CMD_LRESET      (1<<7)          /* partial reset (no ports, etc) */
  63 #define CMD_RESET       (1<<1)          /* reset HC not bus */
  64 #define CMD_RUN         (1<<0)          /* start/stop HC */
  65 #define STS_PCD         (1<<2)          /* port change detect */
  66 #define FLAG_CF         (1<<0)          /* true: we'll support "high speed" */
  67
  68 #define PORT_OWNER      (1<<13)         /* true: companion hc owns this port */
  69 #define PORT_POWER      (1<<12)         /* true: has power (see PPC) */
  70 #define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10))  /* USB 1.1 device */
  71 #define PORT_RESET      (1<<8)          /* reset port */
  72 #define PORT_SUSPEND    (1<<7)          /* suspend port */
  73 #define PORT_RESUME     (1<<6)          /* resume it */
  74 #define PORT_PE         (1<<2)          /* port enable */
  75 #define PORT_CSC        (1<<1)          /* connect status change */
  76 #define PORT_CONNECT    (1<<0)          /* device connected */
  77 #define PORT_RWC_BITS   (PORT_CSC)
  78
  79 struct isp1760_qtd {
  80         struct isp1760_qtd *hw_next;
  81         u8 packet_type;
  82         u8 toggle;
  83
  84         void *data_buffer;
  85         /* the rest is HCD-private */
  86         struct list_head qtd_list;
  87         struct urb *urb;
  88         size_t length;
  89
  90         /* isp special*/
  91         u32 status;
  92 #define URB_COMPLETE_NOTIFY     (1 << 0)
  93 #define URB_ENQUEUED            (1 << 1)
  94 #define URB_TYPE_ATL            (1 << 2)
  95 #define URB_TYPE_INT            (1 << 3)
  96 };
  97
  98 struct isp1760_qh {
  99         /* first part defined by EHCI spec */
 100         struct list_head qtd_list;
 101         struct isp1760_hcd *priv;
 102
 103         /* periodic schedule info */
 104         unsigned short period;          /* polling interval */
 105         struct usb_device *dev;
 106
 107         u32 toggle;
 108         u32 ping;
 109 };
 110
 111 #define ehci_port_speed(priv, portsc) (1 << USB_PORT_FEAT_HIGHSPEED)
 112
 113 static unsigned int isp1760_readl(__u32 __iomem *regs)
 114 {
 115         return readl(regs);
 116 }
 117
 118 static void isp1760_writel(const unsigned int val, __u32 __iomem *regs)
 119 {
 120         writel(val, regs);
 121 }
 122
 123 /*
 124  * The next two copy via MMIO data to/from the device. memcpy_{to|from}io()
 125  * doesn't quite work because some people have to enforce 32-bit access
 126  */
 127 static void priv_read_copy(struct isp1760_hcd *priv, u32 *src,
 128                 __u32 __iomem *dst, u32 offset, u32 len)
 129 {
 130         struct usb_hcd *hcd = priv_to_hcd(priv);
 131         u32 val;
 132         u8 *buff8;
 133
 134         if (!src) {
 135                 printk(KERN_ERR "ERROR: buffer: %p len: %d\n", src, len);
 136                 return;
 137         }
 138         isp1760_writel(offset,  hcd->regs + HC_MEMORY_REG);
 139         /* XXX
 140          * 90nsec delay, the spec says something how this could be avoided.
 141          */
 142         mdelay(1);
 143
 144         while (len >= 4) {
 145                 *src = __raw_readl(dst);
 146                 len -= 4;
 147                 src++;
 148                 dst++;
 149         }
 150
 151         if (!len)
 152                 return;
 153
 154         /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
 155          * allocated.
 156          */
 157         val = isp1760_readl(dst);
 158
 159         buff8 = (u8 *)src;
 160         while (len) {
 161
 162                 *buff8 = val;
 163                 val >>= 8;
 164                 len--;
 165                 buff8++;
 166         }
 167 }
 168
 169 static void priv_write_copy(const struct isp1760_hcd *priv, const u32 *src,
 170                 __u32 __iomem *dst, u32 len)
 171 {
 172         while (len >= 4) {
 173                 __raw_writel(*src, dst);
 174                 len -= 4;
 175                 src++;
 176                 dst++;
 177         }
 178
 179         if (!len)
 180                 return;
 181         /* in case we have 3, 2 or 1 by left. The buffer is allocated and the
 182          * extra bytes should not be read by the HW
 183          */
 184
 185         __raw_writel(*src, dst);
 186 }
 187
 188 /* memory management of the 60kb on the chip from 0x1000 to 0xffff */
 189 static void init_memory(struct isp1760_hcd *priv)
 190 {
 191         int i;
 192         u32 payload;
 193
 194         payload = 0x1000;
 195         for (i = 0; i < BLOCK_1_NUM; i++) {
 196                 priv->memory_pool[i].start = payload;
 197                 priv->memory_pool[i].size = BLOCK_1_SIZE;
 198                 priv->memory_pool[i].free = 1;
 199                 payload += priv->memory_pool[i].size;
 200         }
 201
 202
 203         for (i = BLOCK_1_NUM; i < BLOCK_1_NUM + BLOCK_2_NUM; i++) {
 204                 priv->memory_pool[i].start = payload;
 205                 priv->memory_pool[i].size = BLOCK_2_SIZE;
 206                 priv->memory_pool[i].free = 1;
 207                 payload += priv->memory_pool[i].size;
 208         }
 209
 210
 211         for (i = BLOCK_1_NUM + BLOCK_2_NUM; i < BLOCKS; i++) {
 212                 priv->memory_pool[i].start = payload;
 213                 priv->memory_pool[i].size = BLOCK_3_SIZE;
 214                 priv->memory_pool[i].free = 1;
 215                 payload += priv->memory_pool[i].size;
 216         }
 217
 218         BUG_ON(payload - priv->memory_pool[i - 1].size > PAYLOAD_SIZE);
 219 }
 220
 221 static u32 alloc_mem(struct isp1760_hcd *priv, u32 size)
 222 {
 223         int i;
 224
 225         if (!size)
 226                 return ISP1760_NULL_POINTER;
 227
 228         for (i = 0; i < BLOCKS; i++) {
 229                 if (priv->memory_pool[i].size >= size &&
 230                                 priv->memory_pool[i].free) {
 231
 232                         priv->memory_pool[i].free = 0;
 233                         return priv->memory_pool[i].start;
 234                 }
 235         }
 236
 237         printk(KERN_ERR "ISP1760 MEM: can not allocate %d bytes of memory\n",
 238                         size);
 239         printk(KERN_ERR "Current memory map:\n");
 240         for (i = 0; i < BLOCKS; i++) {
 241                 printk(KERN_ERR "Pool %2d size %4d status: %d\n",
 242                                 i, priv->memory_pool[i].size,
 243                                 priv->memory_pool[i].free);
 244         }
 245         /* XXX maybe -ENOMEM could be possible */
 246         BUG();
 247         return 0;
 248 }
 249
 250 static void free_mem(struct isp1760_hcd *priv, u32 mem)
 251 {
 252         int i;
 253
 254         if (mem == ISP1760_NULL_POINTER)
 255                 return;
 256
 257         for (i = 0; i < BLOCKS; i++) {
 258                 if (priv->memory_pool[i].start == mem) {
 259
 260                         BUG_ON(priv->memory_pool[i].free);
 261
 262                         priv->memory_pool[i].free = 1;
 263                         return ;
 264                 }
 265         }
 266
 267         printk(KERN_ERR "Trying to free not-here-allocated memory :%08x\n",
 268                         mem);
 269         BUG();
 270 }
 271
 272 static void isp1760_init_regs(struct usb_hcd *hcd)
 273 {
 274         isp1760_writel(0, hcd->regs + HC_BUFFER_STATUS_REG);
 275         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
 276                         HC_ATL_PTD_SKIPMAP_REG);
 277         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
 278                         HC_INT_PTD_SKIPMAP_REG);
 279         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
 280                         HC_ISO_PTD_SKIPMAP_REG);
 281
 282         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
 283                         HC_ATL_PTD_DONEMAP_REG);
 284         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
 285                         HC_INT_PTD_DONEMAP_REG);
 286         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
 287                         HC_ISO_PTD_DONEMAP_REG);
 288 }
 289
 290 static int handshake(struct isp1760_hcd *priv, void __iomem *ptr,
 291                       u32 mask, u32 done, int usec)
 292 {
 293         u32 result;
 294
 295         do {
 296                 result = isp1760_readl(ptr);
 297                 if (result == ~0)
 298                         return -ENODEV;
 299                 result &= mask;
 300                 if (result == done)
 301                         return 0;
 302                 udelay(1);
 303                 usec--;
 304         } while (usec > 0);
 305         return -ETIMEDOUT;
 306 }
 307
 308 /* reset a non-running (STS_HALT == 1) controller */
 309 static int ehci_reset(struct isp1760_hcd *priv)
 310 {
 311         int retval;
 312         struct usb_hcd *hcd = priv_to_hcd(priv);
 313         u32 command = isp1760_readl(hcd->regs + HC_USBCMD);
 314
 315         command |= CMD_RESET;
 316         isp1760_writel(command, hcd->regs + HC_USBCMD);
 317         hcd->state = HC_STATE_HALT;
 318         priv->next_statechange = jiffies;
 319         retval = handshake(priv, hcd->regs + HC_USBCMD,
 320                             CMD_RESET, 0, 250 * 1000);
 321         return retval;
 322 }
 323
 324 static void qh_destroy(struct isp1760_qh *qh)
 325 {
 326         BUG_ON(!list_empty(&qh->qtd_list));
 327         kmem_cache_free(qh_cachep, qh);
 328 }
 329
 330 static struct isp1760_qh *isp1760_qh_alloc(struct isp1760_hcd *priv,
 331                 gfp_t flags)
 332 {
 333         struct isp1760_qh *qh;
 334
 335         qh = kmem_cache_zalloc(qh_cachep, flags);
 336         if (!qh)
 337                 return qh;
 338
 339         INIT_LIST_HEAD(&qh->qtd_list);
 340         qh->priv = priv;
 341         return qh;
 342 }
 343
 344 /* magic numbers that can affect system performance */
 345 #define EHCI_TUNE_CERR          3       /* 0-3 qtd retries; 0 == don't stop */
 346 #define EHCI_TUNE_RL_HS         4       /* nak throttle; see 4.9 */
 347 #define EHCI_TUNE_RL_TT         0
 348 #define EHCI_TUNE_MULT_HS       1       /* 1-3 transactions/uframe; 4.10.3 */
 349 #define EHCI_TUNE_MULT_TT       1
 350 #define EHCI_TUNE_FLS           2       /* (small) 256 frame schedule */
 351
 352 /* one-time init, only for memory state */
 353 static int priv_init(struct usb_hcd *hcd)
 354 {
 355         struct isp1760_hcd              *priv = hcd_to_priv(hcd);
 356         u32                     hcc_params;
 357
 358         spin_lock_init(&priv->lock);
 359
 360         /*
 361          * hw default: 1K periodic list heads, one per frame.
 362          * periodic_size can shrink by USBCMD update if hcc_params allows.
 363          */
 364         priv->periodic_size = DEFAULT_I_TDPS;
 365
 366         /* controllers may cache some of the periodic schedule ... */
 367         hcc_params = isp1760_readl(hcd->regs + HC_HCCPARAMS);
 368         /* full frame cache */
 369         if (HCC_ISOC_CACHE(hcc_params))
 370                 priv->i_thresh = 8;
 371         else /* N microframes cached */
 372                 priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
 373
 374         return 0;
 375 }
 376
 377 static int isp1760_hc_setup(struct usb_hcd *hcd)
 378 {
 379         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 380         int result;
 381         u32 scratch;
 382
 383         isp1760_writel(0xdeadbabe, hcd->regs + HC_SCRATCH_REG);
 384         scratch = isp1760_readl(hcd->regs + HC_SCRATCH_REG);
 385         if (scratch != 0xdeadbabe) {
 386                 printk(KERN_ERR "ISP1760: Scratch test failed.\n");
 387                 return -ENODEV;
 388         }
 389
 390         /* pre reset */
 391         isp1760_init_regs(hcd);
 392
 393         /* reset */
 394         isp1760_writel(SW_RESET_RESET_ALL, hcd->regs + HC_RESET_REG);
 395         mdelay(100);
 396
 397         isp1760_writel(SW_RESET_RESET_HC, hcd->regs + HC_RESET_REG);
 398         mdelay(100);
 399
 400         result = ehci_reset(priv);
 401         if (result)
 402                 return result;
 403
 404         /* Step 11 passed */
 405
 406         isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_REG);
 407         isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_ENABLE);
 408
 409         /* ATL reset */
 410         scratch = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
 411         isp1760_writel(scratch | ALL_ATX_RESET, hcd->regs + HC_HW_MODE_CTRL);
 412         mdelay(10);
 413         isp1760_writel(scratch, hcd->regs + HC_HW_MODE_CTRL);
 414
 415         isp1760_writel(PORT1_POWER | PORT1_INIT2, hcd->regs + HC_PORT1_CTRL);
 416         mdelay(10);
 417
 418         priv->hcs_params = isp1760_readl(hcd->regs + HC_HCSPARAMS);
 419
 420         return priv_init(hcd);
 421 }
 422
 423 static void isp1760_init_maps(struct usb_hcd *hcd)
 424 {
 425         /*set last maps, for iso its only 1, else 32 tds bitmap*/
 426         isp1760_writel(0x80000000, hcd->regs + HC_ATL_PTD_LASTPTD_REG);
 427         isp1760_writel(0x80000000, hcd->regs + HC_INT_PTD_LASTPTD_REG);
 428         isp1760_writel(0x00000001, hcd->regs + HC_ISO_PTD_LASTPTD_REG);
 429 }
 430
 431 static void isp1760_enable_interrupts(struct usb_hcd *hcd)
 432 {
 433         isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_AND_REG);
 434         isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 435         isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_AND_REG);
 436         isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
 437         isp1760_writel(0, hcd->regs + HC_ISO_IRQ_MASK_AND_REG);
 438         isp1760_writel(0xffffffff, hcd->regs + HC_ISO_IRQ_MASK_OR_REG);
 439         /* step 23 passed */
 440 }
 441
 442 static int isp1760_run(struct usb_hcd *hcd)
 443 {
 444         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 445         int retval;
 446         u32 temp;
 447         u32 command;
 448         u32 chipid;
 449
 450         hcd->uses_new_polling = 1;
 451         hcd->poll_rh = 0;
 452
 453         hcd->state = HC_STATE_RUNNING;
 454         isp1760_enable_interrupts(hcd);
 455         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
 456         temp |= FINAL_HW_CONFIG;
 457         isp1760_writel(temp, hcd->regs + HC_HW_MODE_CTRL);
 458
 459         command = isp1760_readl(hcd->regs + HC_USBCMD);
 460         command &= ~(CMD_LRESET|CMD_RESET);
 461         command |= CMD_RUN;
 462         isp1760_writel(command, hcd->regs + HC_USBCMD);
 463
 464         retval = handshake(priv, hcd->regs + HC_USBCMD, CMD_RUN, CMD_RUN,
 465                         250 * 1000);
 466         if (retval)
 467                 return retval;
 468
 469         /*
 470          * XXX
 471          * Spec says to write FLAG_CF as last config action, priv code grabs
 472          * the semaphore while doing so.
 473          */
 474         down_write(&ehci_cf_port_reset_rwsem);
 475         isp1760_writel(FLAG_CF, hcd->regs + HC_CONFIGFLAG);
 476
 477         retval = handshake(priv, hcd->regs + HC_CONFIGFLAG, FLAG_CF, FLAG_CF,
 478                         250 * 1000);
 479         up_write(&ehci_cf_port_reset_rwsem);
 480         if (retval)
 481                 return retval;
 482
 483         chipid = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
 484         isp1760_info(priv, "USB ISP %04x HW rev. %d started\n", chipid & 0xffff,
 485                         chipid >> 16);
 486
 487         /* PTD Register Init Part 2, Step 28 */
 488         /* enable INTs */
 489         isp1760_init_maps(hcd);
 490
 491         /* GRR this is run-once init(), being done every time the HC starts.
 492          * So long as they're part of class devices, we can't do it init()
 493          * since the class device isn't created that early.
 494          */
 495         return 0;
 496 }
 497
 498 static u32 base_to_chip(u32 base)
 499 {
 500         return ((base - 0x400) >> 3);
 501 }
 502
 503 static void transform_into_atl(struct isp1760_hcd *priv, struct isp1760_qh *qh,
 504                         struct isp1760_qtd *qtd, struct urb *urb,
 505                         u32 payload, struct ptd *ptd)
 506 {
 507         u32 dw0;
 508         u32 dw1;
 509         u32 dw2;
 510         u32 dw3;
 511         u32 maxpacket;
 512         u32 multi;
 513         u32 pid_code;
 514         u32 rl = RL_COUNTER;
 515         u32 nak = NAK_COUNTER;
 516
 517         /* according to 3.6.2, max packet len can not be > 0x400 */
 518         maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
 519         multi =  1 + ((maxpacket >> 11) & 0x3);
 520         maxpacket &= 0x7ff;
 521
 522         /* DW0 */
 523         dw0 = PTD_VALID;
 524         dw0 |= PTD_LENGTH(qtd->length);
 525         dw0 |= PTD_MAXPACKET(maxpacket);
 526         dw0 |= PTD_ENDPOINT(usb_pipeendpoint(urb->pipe));
 527         dw1 = usb_pipeendpoint(urb->pipe) >> 1;
 528
 529         /* DW1 */
 530         dw1 |= PTD_DEVICE_ADDR(usb_pipedevice(urb->pipe));
 531
 532         pid_code = qtd->packet_type;
 533         dw1 |= PTD_PID_TOKEN(pid_code);
 534
 535         if (usb_pipebulk(urb->pipe))
 536                 dw1 |= PTD_TRANS_BULK;
 537         else if  (usb_pipeint(urb->pipe))
 538                 dw1 |= PTD_TRANS_INT;
 539
 540         if (urb->dev->speed != USB_SPEED_HIGH) {
 541                 /* split transaction */
 542
 543                 dw1 |= PTD_TRANS_SPLIT;
 544                 if (urb->dev->speed == USB_SPEED_LOW)
 545                         dw1 |= PTD_SE_USB_LOSPEED;
 546
 547                 dw1 |= PTD_PORT_NUM(urb->dev->ttport);
 548                 dw1 |= PTD_HUB_NUM(urb->dev->tt->hub->devnum);
 549
 550                 /* SE bit for Split INT transfers */
 551                 if (usb_pipeint(urb->pipe) &&
 552                                 (urb->dev->speed == USB_SPEED_LOW))
 553                         dw1 |= 2 << 16;
 554
 555                 dw3 = 0;
 556                 rl = 0;
 557                 nak = 0;
 558         } else {
 559                 dw0 |= PTD_MULTI(multi);
 560                 if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe))
 561                         dw3 = qh->ping;
 562                 else
 563                         dw3 = 0;
 564         }
 565         /* DW2 */
 566         dw2 = 0;
 567         dw2 |= PTD_DATA_START_ADDR(base_to_chip(payload));
 568         dw2 |= PTD_RL_CNT(rl);
 569         dw3 |= PTD_NAC_CNT(nak);
 570
 571         /* DW3 */
 572         if (usb_pipecontrol(urb->pipe))
 573                 dw3 |= PTD_DATA_TOGGLE(qtd->toggle);
 574         else
 575                 dw3 |= qh->toggle;
 576
 577
 578         dw3 |= PTD_ACTIVE;
 579         /* Cerr */
 580         dw3 |= PTD_CERR(ERR_COUNTER);
 581
 582         memset(ptd, 0, sizeof(*ptd));
 583
 584         ptd->dw0 = cpu_to_le32(dw0);
 585         ptd->dw1 = cpu_to_le32(dw1);
 586         ptd->dw2 = cpu_to_le32(dw2);
 587         ptd->dw3 = cpu_to_le32(dw3);
 588 }
 589
 590 static void transform_add_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
 591                         struct isp1760_qtd *qtd, struct urb *urb,
 592                         u32 payload, struct ptd *ptd)
 593 {
 594         u32 maxpacket;
 595         u32 multi;
 596         u32 numberofusofs;
 597         u32 i;
 598         u32 usofmask, usof;
 599         u32 period;
 600
 601         maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
 602         multi =  1 + ((maxpacket >> 11) & 0x3);
 603         maxpacket &= 0x7ff;
 604         /* length of the data per uframe */
 605         maxpacket = multi * maxpacket;
 606
 607         numberofusofs = urb->transfer_buffer_length / maxpacket;
 608         if (urb->transfer_buffer_length % maxpacket)
 609                 numberofusofs += 1;
 610
 611         usofmask = 1;
 612         usof = 0;
 613         for (i = 0; i < numberofusofs; i++) {
 614                 usof |= usofmask;
 615                 usofmask <<= 1;
 616         }
 617
 618         if (urb->dev->speed != USB_SPEED_HIGH) {
 619                 /* split */
 620                 ptd->dw5 = __constant_cpu_to_le32(0x1c);
 621
 622                 if (qh->period >= 32)
 623                         period = qh->period / 2;
 624                 else
 625                         period = qh->period;
 626
 627         } else {
 628
 629                 if (qh->period >= 8)
 630                         period = qh->period/8;
 631                 else
 632                         period = qh->period;
 633
 634                 if (period >= 32)
 635                         period  = 16;
 636
 637                 if (qh->period >= 8) {
 638                         /* millisecond period */
 639                         period = (period << 3);
 640                 } else {
 641                         /* usof based tranmsfers */
 642                         /* minimum 4 usofs */
 643                         usof = 0x11;
 644                 }
 645         }
 646
 647         ptd->dw2 |= cpu_to_le32(period);
 648         ptd->dw4 = cpu_to_le32(usof);
 649 }
 650
 651 static void transform_into_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
 652                         struct isp1760_qtd *qtd, struct urb *urb,
 653                         u32 payload, struct ptd *ptd)
 654 {
 655         transform_into_atl(priv, qh, qtd, urb, payload, ptd);
 656         transform_add_int(priv, qh, qtd, urb,  payload, ptd);
 657 }
 658
 659 static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len,
 660                 u32 token)
 661 {
 662         int count;
 663
 664         qtd->data_buffer = databuffer;
 665         qtd->packet_type = GET_QTD_TOKEN_TYPE(token);
 666         qtd->toggle = GET_DATA_TOGGLE(token);
 667
 668         if (len > HC_ATL_PL_SIZE)
 669                 count = HC_ATL_PL_SIZE;
 670         else
 671                 count = len;
 672
 673         qtd->length = count;
 674         return count;
 675 }
 676
 677 static int check_error(struct ptd *ptd)
 678 {
 679         int error = 0;
 680         u32 dw3;
 681
 682         dw3 = le32_to_cpu(ptd->dw3);
 683         if (dw3 & DW3_HALT_BIT)
 684                 error = -EPIPE;
 685
 686         if (dw3 & DW3_ERROR_BIT) {
 687                 printk(KERN_ERR "error bit is set in DW3\n");
 688                 error = -EPIPE;
 689         }
 690
 691         if (dw3 & DW3_QTD_ACTIVE) {
 692                 printk(KERN_ERR "transfer active bit is set DW3\n");
 693                 printk(KERN_ERR "nak counter: %d, rl: %d\n", (dw3 >> 19) & 0xf,
 694                                 (le32_to_cpu(ptd->dw2) >> 25) & 0xf);
 695         }
 696
 697         return error;
 698 }
 699
 700 static void check_int_err_status(u32 dw4)
 701 {
 702         u32 i;
 703
 704         dw4 >>= 8;
 705
 706         for (i = 0; i < 8; i++) {
 707                 switch (dw4 & 0x7) {
 708                 case INT_UNDERRUN:
 709                         printk(KERN_ERR "ERROR: under run , %d\n", i);
 710                         break;
 711
 712                 case INT_EXACT:
 713                         printk(KERN_ERR "ERROR: transaction error, %d\n", i);
 714                         break;
 715
 716                 case INT_BABBLE:
 717                         printk(KERN_ERR "ERROR: babble error, %d\n", i);
 718                         break;
 719                 }
 720                 dw4 >>= 3;
 721         }
 722 }
 723
 724 static void enqueue_one_qtd(struct isp1760_qtd *qtd, struct isp1760_hcd *priv,
 725                 u32 payload)
 726 {
 727         u32 token;
 728         struct usb_hcd *hcd = priv_to_hcd(priv);
 729
 730         token = qtd->packet_type;
 731
 732         if (qtd->length && (qtd->length <= HC_ATL_PL_SIZE)) {
 733                 switch (token) {
 734                 case IN_PID:
 735                         break;
 736                 case OUT_PID:
 737                 case SETUP_PID:
 738                         priv_write_copy(priv, qtd->data_buffer,
 739                                         hcd->regs + payload,
 740                                         qtd->length);
 741                 }
 742         }
 743 }
 744
 745 static void enqueue_one_atl_qtd(u32 atl_regs, u32 payload,
 746                 struct isp1760_hcd *priv, struct isp1760_qh *qh,
 747                 struct urb *urb, u32 slot, struct isp1760_qtd *qtd)
 748 {
 749         struct ptd ptd;
 750         struct usb_hcd *hcd = priv_to_hcd(priv);
 751
 752         transform_into_atl(priv, qh, qtd, urb, payload, &ptd);
 753         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + atl_regs, sizeof(ptd));
 754         enqueue_one_qtd(qtd, priv, payload);
 755
 756         priv->atl_ints[slot].urb = urb;
 757         priv->atl_ints[slot].qh = qh;
 758         priv->atl_ints[slot].qtd = qtd;
 759         priv->atl_ints[slot].data_buffer = qtd->data_buffer;
 760         priv->atl_ints[slot].payload = payload;
 761         qtd->status |= URB_ENQUEUED | URB_TYPE_ATL;
 762         qtd->status |= slot << 16;
 763 }
 764
 765 static void enqueue_one_int_qtd(u32 int_regs, u32 payload,
 766                 struct isp1760_hcd *priv, struct isp1760_qh *qh,
 767                 struct urb *urb, u32 slot,  struct isp1760_qtd *qtd)
 768 {
 769         struct ptd ptd;
 770         struct usb_hcd *hcd = priv_to_hcd(priv);
 771
 772         transform_into_int(priv, qh, qtd, urb, payload, &ptd);
 773         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + int_regs, sizeof(ptd));
 774         enqueue_one_qtd(qtd, priv, payload);
 775
 776         priv->int_ints[slot].urb = urb;
 777         priv->int_ints[slot].qh = qh;
 778         priv->int_ints[slot].qtd = qtd;
 779         priv->int_ints[slot].data_buffer = qtd->data_buffer;
 780         priv->int_ints[slot].payload = payload;
 781         qtd->status |= URB_ENQUEUED | URB_TYPE_INT;
 782         qtd->status |= slot << 16;
 783 }
 784
 785 void enqueue_an_ATL_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
 786                 struct isp1760_qtd *qtd)
 787 {
 788         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 789         u32 skip_map, or_map;
 790         u32 queue_entry;
 791         u32 slot;
 792         u32 atl_regs, payload;
 793         u32 buffstatus;
 794
 795         skip_map = isp1760_readl(hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
 796
 797         BUG_ON(!skip_map);
 798         slot = __ffs(skip_map);
 799         queue_entry = 1 << slot;
 800
 801         atl_regs = ATL_REGS_OFFSET + slot * sizeof(struct ptd);
 802
 803         payload = alloc_mem(priv, qtd->length);
 804
 805         enqueue_one_atl_qtd(atl_regs, payload, priv, qh, qtd->urb, slot, qtd);
 806
 807         or_map = isp1760_readl(hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 808         or_map |= queue_entry;
 809         isp1760_writel(or_map, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 810
 811         skip_map &= ~queue_entry;
 812         isp1760_writel(skip_map, hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
 813
 814         buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
 815         buffstatus |= ATL_BUFFER;
 816         isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
 817 }
 818
 819 void enqueue_an_INT_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
 820                 struct isp1760_qtd *qtd)
 821 {
 822         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 823         u32 skip_map, or_map;
 824         u32 queue_entry;
 825         u32 slot;
 826         u32 int_regs, payload;
 827         u32 buffstatus;
 828
 829         skip_map = isp1760_readl(hcd->regs + HC_INT_PTD_SKIPMAP_REG);
 830
 831         BUG_ON(!skip_map);
 832         slot = __ffs(skip_map);
 833         queue_entry = 1 << slot;
 834
 835         int_regs = INT_REGS_OFFSET + slot * sizeof(struct ptd);
 836
 837         payload = alloc_mem(priv, qtd->length);
 838
 839         enqueue_one_int_qtd(int_regs, payload, priv, qh, qtd->urb, slot, qtd);
 840
 841         or_map = isp1760_readl(hcd->regs + HC_INT_IRQ_MASK_OR_REG);
 842         or_map |= queue_entry;
 843         isp1760_writel(or_map, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
 844
 845         skip_map &= ~queue_entry;
 846         isp1760_writel(skip_map, hcd->regs + HC_INT_PTD_SKIPMAP_REG);
 847
 848         buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
 849         buffstatus |= INT_BUFFER;
 850         isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
 851 }
 852
 853 static void isp1760_urb_done(struct isp1760_hcd *priv, struct urb *urb, int status)
 854 __releases(priv->lock)
 855 __acquires(priv->lock)
 856 {
 857         if (!urb->unlinked) {
 858                 if (status == -EINPROGRESS)
 859                         status = 0;
 860         }
 861
 862         /* complete() can reenter this HCD */
 863         usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
 864         spin_unlock(&priv->lock);
 865         usb_hcd_giveback_urb(priv_to_hcd(priv), urb, status);
 866         spin_lock(&priv->lock);
 867 }
 868
 869 static void isp1760_qtd_free(struct isp1760_qtd *qtd)
 870 {
 871         kmem_cache_free(qtd_cachep, qtd);
 872 }
 873
 874 static struct isp1760_qtd *clean_this_qtd(struct isp1760_qtd *qtd)
 875 {
 876         struct isp1760_qtd *tmp_qtd;
 877
 878         tmp_qtd = qtd->hw_next;
 879         list_del(&qtd->qtd_list);
 880         isp1760_qtd_free(qtd);
 881         return tmp_qtd;
 882 }
 883
 884 /*
 885  * Remove this QTD from the QH list and free its memory. If this QTD
 886  * isn't the last one than remove also his successor(s).
 887  * Returns the QTD which is part of an new URB and should be enqueued.
 888  */
 889 static struct isp1760_qtd *clean_up_qtdlist(struct isp1760_qtd *qtd)
 890 {
 891         struct isp1760_qtd *tmp_qtd;
 892         int last_one;
 893
 894         do {
 895                 tmp_qtd = qtd->hw_next;
 896                 last_one = qtd->status & URB_COMPLETE_NOTIFY;
 897                 list_del(&qtd->qtd_list);
 898                 isp1760_qtd_free(qtd);
 899                 qtd = tmp_qtd;
 900         } while (!last_one && qtd);
 901
 902         return qtd;
 903 }
 904
 905 static void do_atl_int(struct usb_hcd *usb_hcd)
 906 {
 907         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
 908         u32 done_map, skip_map;
 909         struct ptd ptd;
 910         struct urb *urb = NULL;
 911         u32 atl_regs_base;
 912         u32 atl_regs;
 913         u32 queue_entry;
 914         u32 payload;
 915         u32 length;
 916         u32 or_map;
 917         u32 status = -EINVAL;
 918         int error;
 919         struct isp1760_qtd *qtd;
 920         struct isp1760_qh *qh;
 921         u32 rl;
 922         u32 nakcount;
 923
 924         done_map = isp1760_readl(usb_hcd->regs +
 925                         HC_ATL_PTD_DONEMAP_REG);
 926         skip_map = isp1760_readl(usb_hcd->regs +
 927                         HC_ATL_PTD_SKIPMAP_REG);
 928
 929         or_map = isp1760_readl(usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 930         or_map &= ~done_map;
 931         isp1760_writel(or_map, usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 932
 933         atl_regs_base = ATL_REGS_OFFSET;
 934         while (done_map) {
 935                 u32 dw1;
 936                 u32 dw2;
 937                 u32 dw3;
 938
 939                 status = 0;
 940
 941                 queue_entry = __ffs(done_map);
 942                 done_map &= ~(1 << queue_entry);
 943                 skip_map |= 1 << queue_entry;
 944
 945                 atl_regs = atl_regs_base + queue_entry * sizeof(struct ptd);
 946
 947                 urb = priv->atl_ints[queue_entry].urb;
 948                 qtd = priv->atl_ints[queue_entry].qtd;
 949                 qh = priv->atl_ints[queue_entry].qh;
 950                 payload = priv->atl_ints[queue_entry].payload;
 951
 952                 if (!qh) {
 953                         printk(KERN_ERR "qh is 0\n");
 954                         continue;
 955                 }
 956                 priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + atl_regs,
 957                                 atl_regs, sizeof(ptd));
 958
 959                 dw1 = le32_to_cpu(ptd.dw1);
 960                 dw2 = le32_to_cpu(ptd.dw2);
 961                 dw3 = le32_to_cpu(ptd.dw3);
 962                 rl = (dw2 >> 25) & 0x0f;
 963                 nakcount = (dw3 >> 19) & 0xf;
 964
 965                 /* Transfer Error, *but* active and no HALT -> reload */
 966                 if ((dw3 & DW3_ERROR_BIT) && (dw3 & DW3_QTD_ACTIVE) &&
 967                                 !(dw3 & DW3_HALT_BIT)) {
 968
 969                         /* according to ppriv code, we have to
 970                          * reload this one if trasfered bytes != requested bytes
 971                          * else act like everything went smooth..
 972                          * XXX This just doesn't feel right and hasn't
 973                          * triggered so far.
 974                          */
 975
 976                         length = PTD_XFERRED_LENGTH(dw3);
 977                         printk(KERN_ERR "Should reload now.... transfered %d "
 978                                         "of %zu\n", length, qtd->length);
 979                         BUG();
 980                 }
 981
 982                 if (!nakcount && (dw3 & DW3_QTD_ACTIVE)) {
 983                         u32 buffstatus;
 984
 985                         /* XXX
 986                          * NAKs are handled in HW by the chip. Usually if the
 987                          * device is not able to send data fast enough.
 988                          * This did not trigger for a long time now.
 989                          */
 990                         printk(KERN_ERR "Reloading ptd %p/%p... qh %p readed: "
 991                                         "%d of %d done: %08x cur: %08x\n", qtd,
 992                                         urb, qh, PTD_XFERRED_LENGTH(dw3),
 993                                         qtd->length, done_map,
 994                                         (1 << queue_entry));
 995
 996                         /* RL counter = ERR counter */
 997                         dw3 &= ~(0xf << 19);
 998                         dw3 |= rl << 19;
 999                         dw3 &= ~(3 << (55 - 32));
1000                         dw3 |= ERR_COUNTER << (55 - 32);
1001
1002                         /*
1003                          * It is not needed to write skip map back because it
1004                          * is unchanged. Just make sure that this entry is
1005                          * unskipped once it gets written to the HW.
1006                          */
1007                         skip_map &= ~(1 << queue_entry);
1008                         or_map = isp1760_readl(usb_hcd->regs +
1009                                         HC_ATL_IRQ_MASK_OR_REG);
1010                         or_map |= 1 << queue_entry;
1011                         isp1760_writel(or_map, usb_hcd->regs +
1012                                         HC_ATL_IRQ_MASK_OR_REG);
1013
1014                         ptd.dw3 = cpu_to_le32(dw3);
1015                         priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
1016                                         atl_regs, sizeof(ptd));
1017
1018                         ptd.dw0 |= __constant_cpu_to_le32(PTD_VALID);
1019                         priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
1020                                         atl_regs, sizeof(ptd));
1021
1022                         buffstatus = isp1760_readl(usb_hcd->regs +
1023                                         HC_BUFFER_STATUS_REG);
1024                         buffstatus |= ATL_BUFFER;
1025                         isp1760_writel(buffstatus, usb_hcd->regs +
1026                                         HC_BUFFER_STATUS_REG);
1027                         continue;
1028                 }
1029
1030                 error = check_error(&ptd);
1031                 if (error) {
1032                         status = error;
1033                         priv->atl_ints[queue_entry].qh->toggle = 0;
1034                         priv->atl_ints[queue_entry].qh->ping = 0;
1035                         urb->status = -EPIPE;
1036
1037 #if 0
1038                         printk(KERN_ERR "Error in %s().\n", __func__);
1039                         printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1040                                         "dw3: %08x dw4: %08x dw5: %08x dw6: "
1041                                         "%08x dw7: %08x\n",
1042                                         ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1043                                         ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1044 #endif
1045                 } else {
1046                         if (usb_pipetype(urb->pipe) == PIPE_BULK) {
1047                                 priv->atl_ints[queue_entry].qh->toggle = dw3 &
1048                                         (1 << 25);
1049                                 priv->atl_ints[queue_entry].qh->ping = dw3 &
1050                                         (1 << 26);
1051                         }
1052                 }
1053
1054                 length = PTD_XFERRED_LENGTH(dw3);
1055                 if (length) {
1056                         switch (DW1_GET_PID(dw1)) {
1057                         case IN_PID:
1058                                 priv_read_copy(priv,
1059                                         priv->atl_ints[queue_entry].data_buffer,
1060                                         usb_hcd->regs + payload, payload,
1061                                         length);
1062
1063                         case OUT_PID:
1064
1065                                 urb->actual_length += length;
1066
1067                         case SETUP_PID:
1068                                 break;
1069                         }
1070                 }
1071
1072                 priv->atl_ints[queue_entry].data_buffer = NULL;
1073                 priv->atl_ints[queue_entry].urb = NULL;
1074                 priv->atl_ints[queue_entry].qtd = NULL;
1075                 priv->atl_ints[queue_entry].qh = NULL;
1076
1077                 free_mem(priv, payload);
1078
1079                 isp1760_writel(skip_map, usb_hcd->regs +
1080                                 HC_ATL_PTD_SKIPMAP_REG);
1081
1082                 if (urb->status == -EPIPE) {
1083                         /* HALT was received */
1084
1085                         qtd = clean_up_qtdlist(qtd);
1086                         isp1760_urb_done(priv, urb, urb->status);
1087
1088                 } else if (usb_pipebulk(urb->pipe) && (length < qtd->length)) {
1089                         /* short BULK received */
1090
1091                         printk(KERN_ERR "short bulk, %d instead %d\n", length,
1092                                         qtd->length);
1093                         if (urb->transfer_flags & URB_SHORT_NOT_OK) {
1094                                 urb->status = -EREMOTEIO;
1095                                 printk(KERN_ERR "not okey\n");
1096                         }
1097
1098                         if (urb->status == -EINPROGRESS)
1099                                 urb->status = 0;
1100
1101                         qtd = clean_up_qtdlist(qtd);
1102
1103                         isp1760_urb_done(priv, urb, urb->status);
1104
1105                 } else if (qtd->status & URB_COMPLETE_NOTIFY) {
1106                         /* that was the last qtd of that URB */
1107
1108                         if (urb->status == -EINPROGRESS)
1109                                 urb->status = 0;
1110
1111                         qtd = clean_this_qtd(qtd);
1112                         isp1760_urb_done(priv, urb, urb->status);
1113
1114                 } else {
1115                         /* next QTD of this URB */
1116
1117                         qtd = clean_this_qtd(qtd);
1118                         BUG_ON(!qtd);
1119                 }
1120
1121                 if (qtd)
1122                         enqueue_an_ATL_packet(usb_hcd, qh, qtd);
1123
1124                 skip_map = isp1760_readl(usb_hcd->regs +
1125                                 HC_ATL_PTD_SKIPMAP_REG);
1126         }
1127 }
1128
1129 static void do_intl_int(struct usb_hcd *usb_hcd)
1130 {
1131         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
1132         u32 done_map, skip_map;
1133         struct ptd ptd;
1134         struct urb *urb = NULL;
1135         u32 int_regs;
1136         u32 int_regs_base;
1137         u32 payload;
1138         u32 length;
1139         u32 or_map;
1140         int error;
1141         u32 queue_entry;
1142         struct isp1760_qtd *qtd;
1143         struct isp1760_qh *qh;
1144
1145         done_map = isp1760_readl(usb_hcd->regs +
1146                         HC_INT_PTD_DONEMAP_REG);
1147         skip_map = isp1760_readl(usb_hcd->regs +
1148                         HC_INT_PTD_SKIPMAP_REG);
1149
1150         or_map = isp1760_readl(usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
1151         or_map &= ~done_map;
1152         isp1760_writel(or_map, usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
1153
1154         int_regs_base = INT_REGS_OFFSET;
1155
1156         while (done_map) {
1157                 u32 dw1;
1158                 u32 dw3;
1159
1160                 queue_entry = __ffs(done_map);
1161                 done_map &= ~(1 << queue_entry);
1162                 skip_map |= 1 << queue_entry;
1163
1164                 int_regs = int_regs_base + queue_entry * sizeof(struct ptd);
1165                 urb = priv->int_ints[queue_entry].urb;
1166                 qtd = priv->int_ints[queue_entry].qtd;
1167                 qh = priv->int_ints[queue_entry].qh;
1168                 payload = priv->int_ints[queue_entry].payload;
1169
1170                 if (!qh) {
1171                         printk(KERN_ERR "(INT) qh is 0\n");
1172                         continue;
1173                 }
1174
1175                 priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + int_regs,
1176                                 int_regs, sizeof(ptd));
1177                 dw1 = le32_to_cpu(ptd.dw1);
1178                 dw3 = le32_to_cpu(ptd.dw3);
1179                 check_int_err_status(le32_to_cpu(ptd.dw4));
1180
1181                 error = check_error(&ptd);
1182                 if (error) {
1183 #if 0
1184                         printk(KERN_ERR "Error in %s().\n", __func__);
1185                         printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1186                                         "dw3: %08x dw4: %08x dw5: %08x dw6: "
1187                                         "%08x dw7: %08x\n",
1188                                         ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1189                                         ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1190 #endif
1191                         urb->status = -EPIPE;
1192                         priv->int_ints[queue_entry].qh->toggle = 0;
1193                         priv->int_ints[queue_entry].qh->ping = 0;
1194
1195                 } else {
1196                         priv->int_ints[queue_entry].qh->toggle =
1197                                 dw3 & (1 << 25);
1198                         priv->int_ints[queue_entry].qh->ping = dw3 & (1 << 26);
1199                 }
1200
1201                 if (urb->dev->speed != USB_SPEED_HIGH)
1202                         length = PTD_XFERRED_LENGTH_LO(dw3);
1203                 else
1204                         length = PTD_XFERRED_LENGTH(dw3);
1205
1206                 if (length) {
1207                         switch (DW1_GET_PID(dw1)) {
1208                         case IN_PID:
1209                                 priv_read_copy(priv,
1210                                         priv->int_ints[queue_entry].data_buffer,
1211                                         usb_hcd->regs + payload , payload,
1212                                         length);
1213                         case OUT_PID:
1214
1215                                 urb->actual_length += length;
1216
1217                         case SETUP_PID:
1218                                 break;
1219                         }
1220                 }
1221
1222                 priv->int_ints[queue_entry].data_buffer = NULL;
1223                 priv->int_ints[queue_entry].urb = NULL;
1224                 priv->int_ints[queue_entry].qtd = NULL;
1225                 priv->int_ints[queue_entry].qh = NULL;
1226
1227                 isp1760_writel(skip_map, usb_hcd->regs +
1228                                 HC_INT_PTD_SKIPMAP_REG);
1229                 free_mem(priv, payload);
1230
1231                 if (urb->status == -EPIPE) {
1232                         /* HALT received */
1233
1234                          qtd = clean_up_qtdlist(qtd);
1235                          isp1760_urb_done(priv, urb, urb->status);
1236
1237                 } else if (qtd->status & URB_COMPLETE_NOTIFY) {
1238
1239                         if (urb->status == -EINPROGRESS)
1240                                 urb->status = 0;
1241
1242                         qtd = clean_this_qtd(qtd);
1243                         isp1760_urb_done(priv, urb, urb->status);
1244
1245                 } else {
1246                         /* next QTD of this URB */
1247
1248                         qtd = clean_this_qtd(qtd);
1249                         BUG_ON(!qtd);
1250                 }
1251
1252                 if (qtd)
1253                         enqueue_an_INT_packet(usb_hcd, qh, qtd);
1254
1255                 skip_map = isp1760_readl(usb_hcd->regs +
1256                                 HC_INT_PTD_SKIPMAP_REG);
1257         }
1258 }
1259
1260 #define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
1261 static struct isp1760_qh *qh_make(struct isp1760_hcd *priv, struct urb *urb,
1262                 gfp_t flags)
1263 {
1264         struct isp1760_qh *qh;
1265         int is_input, type;
1266
1267         qh = isp1760_qh_alloc(priv, flags);
1268         if (!qh)
1269                 return qh;
1270
1271         /*
1272          * init endpoint/device data for this QH
1273          */
1274         is_input = usb_pipein(urb->pipe);
1275         type = usb_pipetype(urb->pipe);
1276
1277         if (type == PIPE_INTERRUPT) {
1278
1279                 if (urb->dev->speed == USB_SPEED_HIGH) {
1280
1281                         qh->period = urb->interval >> 3;
1282                         if (qh->period == 0 && urb->interval != 1) {
1283                                 /* NOTE interval 2 or 4 uframes could work.
1284                                  * But interval 1 scheduling is simpler, and
1285                                  * includes high bandwidth.
1286                                  */
1287                                 printk(KERN_ERR "intr period %d uframes, NYET!",
1288                                                 urb->interval);
1289                                 qh_destroy(qh);
1290                                 return NULL;
1291                         }
1292                 } else {
1293                         qh->period = urb->interval;
1294                 }
1295         }
1296
1297         /* support for tt scheduling, and access to toggles */
1298         qh->dev = urb->dev;
1299
1300         if (!usb_pipecontrol(urb->pipe))
1301                 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input,
1302                                 1);
1303         return qh;
1304 }
1305
1306 /*
1307  * For control/bulk/interrupt, return QH with these TDs appended.
1308  * Allocates and initializes the QH if necessary.
1309  * Returns null if it can't allocate a QH it needs to.
1310  * If the QH has TDs (urbs) already, that's great.
1311  */
1312 static struct isp1760_qh *qh_append_tds(struct isp1760_hcd *priv,
1313                 struct urb *urb, struct list_head *qtd_list, int epnum,
1314                 void **ptr)
1315 {
1316         struct isp1760_qh *qh;
1317         struct isp1760_qtd *qtd;
1318         struct isp1760_qtd *prev_qtd;
1319
1320         qh = (struct isp1760_qh *)*ptr;
1321         if (!qh) {
1322                 /* can't sleep here, we have priv->lock... */
1323                 qh = qh_make(priv, urb, GFP_ATOMIC);
1324                 if (!qh)
1325                         return qh;
1326                 *ptr = qh;
1327         }
1328
1329         qtd = list_entry(qtd_list->next, struct isp1760_qtd,
1330                         qtd_list);
1331         if (!list_empty(&qh->qtd_list))
1332                 prev_qtd = list_entry(qh->qtd_list.prev,
1333                                 struct isp1760_qtd, qtd_list);
1334         else
1335                 prev_qtd = NULL;
1336
1337         list_splice(qtd_list, qh->qtd_list.prev);
1338         if (prev_qtd) {
1339                 BUG_ON(prev_qtd->hw_next);
1340                 prev_qtd->hw_next = qtd;
1341         }
1342
1343         urb->hcpriv = qh;
1344         return qh;
1345 }
1346
1347 static void qtd_list_free(struct isp1760_hcd *priv, struct urb *urb,
1348                 struct list_head *qtd_list)
1349 {
1350         struct list_head *entry, *temp;
1351
1352         list_for_each_safe(entry, temp, qtd_list) {
1353                 struct isp1760_qtd      *qtd;
1354
1355                 qtd = list_entry(entry, struct isp1760_qtd, qtd_list);
1356                 list_del(&qtd->qtd_list);
1357                 isp1760_qtd_free(qtd);
1358         }
1359 }
1360
1361 static int isp1760_prepare_enqueue(struct isp1760_hcd *priv, struct urb *urb,
1362                 struct list_head *qtd_list, gfp_t mem_flags, packet_enqueue *p)
1363 {
1364         struct isp1760_qtd         *qtd;
1365         int                     epnum;
1366         unsigned long           flags;
1367         struct isp1760_qh          *qh = NULL;
1368         int                     rc;
1369         int qh_busy;
1370
1371         qtd = list_entry(qtd_list->next, struct isp1760_qtd, qtd_list);
1372         epnum = urb->ep->desc.bEndpointAddress;
1373
1374         spin_lock_irqsave(&priv->lock, flags);
1375         if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &priv_to_hcd(priv)->flags)) {
1376                 rc = -ESHUTDOWN;
1377                 goto done;
1378         }
1379         rc = usb_hcd_link_urb_to_ep(priv_to_hcd(priv), urb);
1380         if (rc)
1381                 goto done;
1382
1383         qh = urb->ep->hcpriv;
1384         if (qh)
1385                 qh_busy = !list_empty(&qh->qtd_list);
1386         else
1387                 qh_busy = 0;
1388
1389         qh = qh_append_tds(priv, urb, qtd_list, epnum, &urb->ep->hcpriv);
1390         if (!qh) {
1391                 usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
1392                 rc = -ENOMEM;
1393                 goto done;
1394         }
1395
1396         if (!qh_busy)
1397                 p(priv_to_hcd(priv), qh, qtd);
1398
1399 done:
1400         spin_unlock_irqrestore(&priv->lock, flags);
1401         if (!qh)
1402                 qtd_list_free(priv, urb, qtd_list);
1403         return rc;
1404 }
1405
1406 static struct isp1760_qtd *isp1760_qtd_alloc(struct isp1760_hcd *priv,
1407                 gfp_t flags)
1408 {
1409         struct isp1760_qtd *qtd;
1410
1411         qtd = kmem_cache_zalloc(qtd_cachep, flags);
1412         if (qtd)
1413                 INIT_LIST_HEAD(&qtd->qtd_list);
1414
1415         return qtd;
1416 }
1417
1418 /*
1419  * create a list of filled qtds for this URB; won't link into qh.
1420  */
1421 static struct list_head *qh_urb_transaction(struct isp1760_hcd *priv,
1422                 struct urb *urb, struct list_head *head, gfp_t flags)
1423 {
1424         struct isp1760_qtd *qtd, *qtd_prev;
1425         void *buf;
1426         int len, maxpacket;
1427         int is_input;
1428         u32 token;
1429
1430         /*
1431          * URBs map to sequences of QTDs:  one logical transaction
1432          */
1433         qtd = isp1760_qtd_alloc(priv, flags);
1434         if (!qtd)
1435                 return NULL;
1436
1437         list_add_tail(&qtd->qtd_list, head);
1438         qtd->urb = urb;
1439         urb->status = -EINPROGRESS;
1440
1441         token = 0;
1442         /* for split transactions, SplitXState initialized to zero */
1443
1444         len = urb->transfer_buffer_length;
1445         is_input = usb_pipein(urb->pipe);
1446         if (usb_pipecontrol(urb->pipe)) {
1447                 /* SETUP pid */
1448                 qtd_fill(qtd, urb->setup_packet,
1449                                 sizeof(struct usb_ctrlrequest),
1450                                 token | SETUP_PID);
1451
1452                 /* ... and always at least one more pid */
1453                 token ^= DATA_TOGGLE;
1454                 qtd_prev = qtd;
1455                 qtd = isp1760_qtd_alloc(priv, flags);
1456                 if (!qtd)
1457                         goto cleanup;
1458                 qtd->urb = urb;
1459                 qtd_prev->hw_next = qtd;
1460                 list_add_tail(&qtd->qtd_list, head);
1461
1462                 /* for zero length DATA stages, STATUS is always IN */
1463                 if (len == 0)
1464                         token |= IN_PID;
1465         }
1466
1467         /*
1468          * data transfer stage:  buffer setup
1469          */
1470         buf = urb->transfer_buffer;
1471
1472         if (is_input)
1473                 token |= IN_PID;
1474         else
1475                 token |= OUT_PID;
1476
1477         maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input));
1478
1479         /*
1480          * buffer gets wrapped in one or more qtds;
1481          * last one may be "short" (including zero len)
1482          * and may serve as a control status ack
1483          */
1484         for (;;) {
1485                 int this_qtd_len;
1486
1487                 if (!buf && len) {
1488                         /* XXX This looks like usb storage / SCSI bug */
1489                         printk(KERN_ERR "buf is null, dma is %08lx len is %d\n",
1490                                         (long unsigned)urb->transfer_dma, len);
1491                         WARN_ON(1);
1492                 }
1493
1494                 this_qtd_len = qtd_fill(qtd, buf, len, token);
1495                 len -= this_qtd_len;
1496                 buf += this_qtd_len;
1497
1498                 /* qh makes control packets use qtd toggle; maybe switch it */
1499                 if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0)
1500                         token ^= DATA_TOGGLE;
1501
1502                 if (len <= 0)
1503                         break;
1504
1505                 qtd_prev = qtd;
1506                 qtd = isp1760_qtd_alloc(priv, flags);
1507                 if (!qtd)
1508                         goto cleanup;
1509                 qtd->urb = urb;
1510                 qtd_prev->hw_next = qtd;
1511                 list_add_tail(&qtd->qtd_list, head);
1512         }
1513
1514         /*
1515          * control requests may need a terminating data "status" ack;
1516          * bulk ones may need a terminating short packet (zero length).
1517          */
1518         if (urb->transfer_buffer_length != 0) {
1519                 int one_more = 0;
1520
1521                 if (usb_pipecontrol(urb->pipe)) {
1522                         one_more = 1;
1523                         /* "in" <--> "out"  */
1524                         token ^= IN_PID;
1525                         /* force DATA1 */
1526                         token |= DATA_TOGGLE;
1527                 } else if (usb_pipebulk(urb->pipe)
1528                                 && (urb->transfer_flags & URB_ZERO_PACKET)
1529                                 && !(urb->transfer_buffer_length % maxpacket)) {
1530                         one_more = 1;
1531                 }
1532                 if (one_more) {
1533                         qtd_prev = qtd;
1534                         qtd = isp1760_qtd_alloc(priv, flags);
1535                         if (!qtd)
1536                                 goto cleanup;
1537                         qtd->urb = urb;
1538                         qtd_prev->hw_next = qtd;
1539                         list_add_tail(&qtd->qtd_list, head);
1540
1541                         /* never any data in such packets */
1542                         qtd_fill(qtd, NULL, 0, token);
1543                 }
1544         }
1545
1546         qtd->status = URB_COMPLETE_NOTIFY;
1547         return head;
1548
1549 cleanup:
1550         qtd_list_free(priv, urb, head);
1551         return NULL;
1552 }
1553
1554 static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
1555                 gfp_t mem_flags)
1556 {
1557         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1558         struct list_head qtd_list;
1559         packet_enqueue *pe;
1560
1561         INIT_LIST_HEAD(&qtd_list);
1562
1563         switch (usb_pipetype(urb->pipe)) {
1564         case PIPE_CONTROL:
1565         case PIPE_BULK:
1566
1567                 if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
1568                         return -ENOMEM;
1569                 pe =  enqueue_an_ATL_packet;
1570                 break;
1571
1572         case PIPE_INTERRUPT:
1573                 if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
1574                         return -ENOMEM;
1575                 pe = enqueue_an_INT_packet;
1576                 break;
1577
1578         case PIPE_ISOCHRONOUS:
1579                 printk(KERN_ERR "PIPE_ISOCHRONOUS ain't supported\n");
1580         default:
1581                 return -EPIPE;
1582         }
1583
1584         isp1760_prepare_enqueue(priv, urb, &qtd_list, mem_flags, pe);
1585         return 0;
1586 }
1587
1588 static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
1589                 int status)
1590 {
1591         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1592         struct inter_packet_info *ints;
1593         u32 i;
1594         u32 reg_base, or_reg, skip_reg;
1595         int flags;
1596         struct ptd ptd;
1597
1598         switch (usb_pipetype(urb->pipe)) {
1599         case PIPE_ISOCHRONOUS:
1600                 return -EPIPE;
1601                 break;
1602
1603         case PIPE_INTERRUPT:
1604                 ints = priv->int_ints;
1605                 reg_base = INT_REGS_OFFSET;
1606                 or_reg = HC_INT_IRQ_MASK_OR_REG;
1607                 skip_reg = HC_INT_PTD_SKIPMAP_REG;
1608                 break;
1609
1610         default:
1611                 ints = priv->atl_ints;
1612                 reg_base = ATL_REGS_OFFSET;
1613                 or_reg = HC_ATL_IRQ_MASK_OR_REG;
1614                 skip_reg = HC_ATL_PTD_SKIPMAP_REG;
1615                 break;
1616         }
1617
1618         memset(&ptd, 0, sizeof(ptd));
1619         spin_lock_irqsave(&priv->lock, flags);
1620
1621         for (i = 0; i < 32; i++) {
1622                 if (ints->urb == urb) {
1623                         u32 skip_map;
1624                         u32 or_map;
1625                         struct isp1760_qtd *qtd;
1626
1627                         skip_map = isp1760_readl(hcd->regs + skip_reg);
1628                         skip_map |= 1 << i;
1629                         isp1760_writel(skip_map, hcd->regs + skip_reg);
1630
1631                         or_map = isp1760_readl(hcd->regs + or_reg);
1632                         or_map &= ~(1 << i);
1633                         isp1760_writel(or_map, hcd->regs + or_reg);
1634
1635                         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + reg_base
1636                                         + i * sizeof(ptd), sizeof(ptd));
1637                         qtd = ints->qtd;
1638
1639                         clean_up_qtdlist(qtd);
1640
1641                         free_mem(priv, ints->payload);
1642
1643                         ints->urb = NULL;
1644                         ints->qh = NULL;
1645                         ints->qtd = NULL;
1646                         ints->data_buffer = NULL;
1647                         ints->payload = 0;
1648
1649                         isp1760_urb_done(priv, urb, status);
1650                         break;
1651                 }
1652                 ints++;
1653         }
1654
1655         spin_unlock_irqrestore(&priv->lock, flags);
1656         return 0;
1657 }
1658
1659 static irqreturn_t isp1760_irq(struct usb_hcd *usb_hcd)
1660 {
1661         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
1662         u32 imask;
1663         irqreturn_t irqret = IRQ_NONE;
1664
1665         spin_lock(&priv->lock);
1666
1667         if (!(usb_hcd->state & HC_STATE_RUNNING))
1668                 goto leave;
1669
1670         imask = isp1760_readl(usb_hcd->regs + HC_INTERRUPT_REG);
1671         if (unlikely(!imask))
1672                 goto leave;
1673
1674         isp1760_writel(imask, usb_hcd->regs + HC_INTERRUPT_REG);
1675         if (imask & HC_ATL_INT)
1676                 do_atl_int(usb_hcd);
1677
1678         if (imask & HC_INTL_INT)
1679                 do_intl_int(usb_hcd);
1680
1681         irqret = IRQ_HANDLED;
1682 leave:
1683         spin_unlock(&priv->lock);
1684         return irqret;
1685 }
1686
1687 static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf)
1688 {
1689         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1690         u32 temp, status = 0;
1691         u32 mask;
1692         int retval = 1;
1693         unsigned long flags;
1694
1695         /* if !USB_SUSPEND, root hub timers won't get shut down ... */
1696         if (!HC_IS_RUNNING(hcd->state))
1697                 return 0;
1698
1699         /* init status to no-changes */
1700         buf[0] = 0;
1701         mask = PORT_CSC;
1702
1703         spin_lock_irqsave(&priv->lock, flags);
1704         temp = isp1760_readl(hcd->regs + HC_PORTSC1);
1705
1706         if (temp & PORT_OWNER) {
1707                 if (temp & PORT_CSC) {
1708                         temp &= ~PORT_CSC;
1709                         isp1760_writel(temp, hcd->regs + HC_PORTSC1);
1710                         goto done;
1711                 }
1712         }
1713
1714         /*
1715          * Return status information even for ports with OWNER set.
1716          * Otherwise khubd wouldn't see the disconnect event when a
1717          * high-speed device is switched over to the companion
1718          * controller by the user.
1719          */
1720
1721         if ((temp & mask) != 0
1722                         || ((temp & PORT_RESUME) != 0
1723                                 && time_after_eq(jiffies,
1724                                         priv->reset_done))) {
1725                 buf [0] |= 1 << (0 + 1);
1726                 status = STS_PCD;
1727         }
1728         /* FIXME autosuspend idle root hubs */
1729 done:
1730         spin_unlock_irqrestore(&priv->lock, flags);
1731         return status ? retval : 0;
1732 }
1733
1734 static void isp1760_hub_descriptor(struct isp1760_hcd *priv,
1735                 struct usb_hub_descriptor *desc)
1736 {
1737         int ports = HCS_N_PORTS(priv->hcs_params);
1738         u16 temp;
1739
1740         desc->bDescriptorType = 0x29;
1741         /* priv 1.0, 2.3.9 says 20ms max */
1742         desc->bPwrOn2PwrGood = 10;
1743         desc->bHubContrCurrent = 0;
1744
1745         desc->bNbrPorts = ports;
1746         temp = 1 + (ports / 8);
1747         desc->bDescLength = 7 + 2 * temp;
1748
1749         /* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
1750         memset(&desc->bitmap[0], 0, temp);
1751         memset(&desc->bitmap[temp], 0xff, temp);
1752
1753         /* per-port overcurrent reporting */
1754         temp = 0x0008;
1755         if (HCS_PPC(priv->hcs_params))
1756                 /* per-port power control */
1757                 temp |= 0x0001;
1758         else
1759                 /* no power switching */
1760                 temp |= 0x0002;
1761         desc->wHubCharacteristics = cpu_to_le16(temp);
1762 }
1763
1764 #define PORT_WAKE_BITS  (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
1765
1766 static int check_reset_complete(struct isp1760_hcd *priv, int index,
1767                 u32 __iomem *status_reg, int port_status)
1768 {
1769         if (!(port_status & PORT_CONNECT))
1770                 return port_status;
1771
1772         /* if reset finished and it's still not enabled -- handoff */
1773         if (!(port_status & PORT_PE)) {
1774
1775                 printk(KERN_ERR "port %d full speed --> companion\n",
1776                         index + 1);
1777
1778                 port_status |= PORT_OWNER;
1779                 port_status &= ~PORT_RWC_BITS;
1780                 isp1760_writel(port_status, status_reg);
1781
1782         } else
1783                 printk(KERN_ERR "port %d high speed\n", index + 1);
1784
1785         return port_status;
1786 }
1787
1788 static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq,
1789                 u16 wValue, u16 wIndex, char *buf, u16 wLength)
1790 {
1791         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1792         int ports = HCS_N_PORTS(priv->hcs_params);
1793         u32 __iomem *status_reg = hcd->regs + HC_PORTSC1;
1794         u32 temp, status;
1795         unsigned long flags;
1796         int retval = 0;
1797         unsigned selector;
1798
1799         /*
1800          * FIXME:  support SetPortFeatures USB_PORT_FEAT_INDICATOR.
1801          * HCS_INDICATOR may say we can change LEDs to off/amber/green.
1802          * (track current state ourselves) ... blink for diagnostics,
1803          * power, "this is the one", etc.  EHCI spec supports this.
1804          */
1805
1806         spin_lock_irqsave(&priv->lock, flags);
1807         switch (typeReq) {
1808         case ClearHubFeature:
1809                 switch (wValue) {
1810                 case C_HUB_LOCAL_POWER:
1811                 case C_HUB_OVER_CURRENT:
1812                         /* no hub-wide feature/status flags */
1813                         break;
1814                 default:
1815                         goto error;
1816                 }
1817                 break;
1818         case ClearPortFeature:
1819                 if (!wIndex || wIndex > ports)
1820                         goto error;
1821                 wIndex--;
1822                 temp = isp1760_readl(status_reg);
1823
1824                 /*
1825                  * Even if OWNER is set, so the port is owned by the
1826                  * companion controller, khubd needs to be able to clear
1827                  * the port-change status bits (especially
1828                  * USB_PORT_FEAT_C_CONNECTION).
1829                  */
1830
1831                 switch (wValue) {
1832                 case USB_PORT_FEAT_ENABLE:
1833                         isp1760_writel(temp & ~PORT_PE, status_reg);
1834                         break;
1835                 case USB_PORT_FEAT_C_ENABLE:
1836                         /* XXX error? */
1837                         break;
1838                 case USB_PORT_FEAT_SUSPEND:
1839                         if (temp & PORT_RESET)
1840                                 goto error;
1841
1842                         if (temp & PORT_SUSPEND) {
1843                                 if ((temp & PORT_PE) == 0)
1844                                         goto error;
1845                                 /* resume signaling for 20 msec */
1846                                 temp &= ~(PORT_RWC_BITS);
1847                                 isp1760_writel(temp | PORT_RESUME,
1848                                                 status_reg);
1849                                 priv->reset_done = jiffies +
1850                                         msecs_to_jiffies(20);
1851                         }
1852                         break;
1853                 case USB_PORT_FEAT_C_SUSPEND:
1854                         /* we auto-clear this feature */
1855                         break;
1856                 case USB_PORT_FEAT_POWER:
1857                         if (HCS_PPC(priv->hcs_params))
1858                                 isp1760_writel(temp & ~PORT_POWER, status_reg);
1859                         break;
1860                 case USB_PORT_FEAT_C_CONNECTION:
1861                         isp1760_writel(temp | PORT_CSC,
1862                                         status_reg);
1863                         break;
1864                 case USB_PORT_FEAT_C_OVER_CURRENT:
1865                         /* XXX error ?*/
1866                         break;
1867                 case USB_PORT_FEAT_C_RESET:
1868                         /* GetPortStatus clears reset */
1869                         break;
1870                 default:
1871                         goto error;
1872                 }
1873                 isp1760_readl(hcd->regs + HC_USBCMD);
1874                 break;
1875         case GetHubDescriptor:
1876                 isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *)
1877                         buf);
1878                 break;
1879         case GetHubStatus:
1880                 /* no hub-wide feature/status flags */
1881                 memset(buf, 0, 4);
1882                 break;
1883         case GetPortStatus:
1884                 if (!wIndex || wIndex > ports)
1885                         goto error;
1886                 wIndex--;
1887                 status = 0;
1888                 temp = isp1760_readl(status_reg);
1889
1890                 /* wPortChange bits */
1891                 if (temp & PORT_CSC)
1892                         status |= 1 << USB_PORT_FEAT_C_CONNECTION;
1893
1894
1895                 /* whoever resumes must GetPortStatus to complete it!! */
1896                 if (temp & PORT_RESUME) {
1897                         printk(KERN_ERR "Port resume should be skipped.\n");
1898
1899                         /* Remote Wakeup received? */
1900                         if (!priv->reset_done) {
1901                                 /* resume signaling for 20 msec */
1902                                 priv->reset_done = jiffies
1903                                                 + msecs_to_jiffies(20);
1904                                 /* check the port again */
1905                                 mod_timer(&priv_to_hcd(priv)->rh_timer,
1906                                                 priv->reset_done);
1907                         }
1908
1909                         /* resume completed? */
1910                         else if (time_after_eq(jiffies,
1911                                         priv->reset_done)) {
1912                                 status |= 1 << USB_PORT_FEAT_C_SUSPEND;
1913                                 priv->reset_done = 0;
1914
1915                                 /* stop resume signaling */
1916                                 temp = isp1760_readl(status_reg);
1917                                 isp1760_writel(
1918                                         temp & ~(PORT_RWC_BITS | PORT_RESUME),
1919                                         status_reg);
1920                                 retval = handshake(priv, status_reg,
1921                                            PORT_RESUME, 0, 2000 /* 2msec */);
1922                                 if (retval != 0) {
1923                                         isp1760_err(priv,
1924                                                 "port %d resume error %d\n",
1925                                                 wIndex + 1, retval);
1926                                         goto error;
1927                                 }
1928                                 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
1929                         }
1930                 }
1931
1932                 /* whoever resets must GetPortStatus to complete it!! */
1933                 if ((temp & PORT_RESET)
1934                                 && time_after_eq(jiffies,
1935                                         priv->reset_done)) {
1936                         status |= 1 << USB_PORT_FEAT_C_RESET;
1937                         priv->reset_done = 0;
1938
1939                         /* force reset to complete */
1940                         isp1760_writel(temp & ~PORT_RESET,
1941                                         status_reg);
1942                         /* REVISIT:  some hardware needs 550+ usec to clear
1943                          * this bit; seems too long to spin routinely...
1944                          */
1945                         retval = handshake(priv, status_reg,
1946                                         PORT_RESET, 0, 750);
1947                         if (retval != 0) {
1948                                 isp1760_err(priv, "port %d reset error %d\n",
1949                                                 wIndex + 1, retval);
1950                                 goto error;
1951                         }
1952
1953                         /* see what we found out */
1954                         temp = check_reset_complete(priv, wIndex, status_reg,
1955                                         isp1760_readl(status_reg));
1956                 }
1957                 /*
1958                  * Even if OWNER is set, there's no harm letting khubd
1959                  * see the wPortStatus values (they should all be 0 except
1960                  * for PORT_POWER anyway).
1961                  */
1962
1963                 if (temp & PORT_OWNER)
1964                         printk(KERN_ERR "Warning: PORT_OWNER is set\n");
1965
1966                 if (temp & PORT_CONNECT) {
1967                         status |= 1 << USB_PORT_FEAT_CONNECTION;
1968                         /* status may be from integrated TT */
1969                         status |= ehci_port_speed(priv, temp);
1970                 }
1971                 if (temp & PORT_PE)
1972                         status |= 1 << USB_PORT_FEAT_ENABLE;
1973                 if (temp & (PORT_SUSPEND|PORT_RESUME))
1974                         status |= 1 << USB_PORT_FEAT_SUSPEND;
1975                 if (temp & PORT_RESET)
1976                         status |= 1 << USB_PORT_FEAT_RESET;
1977                 if (temp & PORT_POWER)
1978                         status |= 1 << USB_PORT_FEAT_POWER;
1979
1980                 put_unaligned(cpu_to_le32(status), (__le32 *) buf);
1981                 break;
1982         case SetHubFeature:
1983                 switch (wValue) {
1984                 case C_HUB_LOCAL_POWER:
1985                 case C_HUB_OVER_CURRENT:
1986                         /* no hub-wide feature/status flags */
1987                         break;
1988                 default:
1989                         goto error;
1990                 }
1991                 break;
1992         case SetPortFeature:
1993                 selector = wIndex >> 8;
1994                 wIndex &= 0xff;
1995                 if (!wIndex || wIndex > ports)
1996                         goto error;
1997                 wIndex--;
1998                 temp = isp1760_readl(status_reg);
1999                 if (temp & PORT_OWNER)
2000                         break;
2001
2002 /*              temp &= ~PORT_RWC_BITS; */
2003                 switch (wValue) {
2004                 case USB_PORT_FEAT_ENABLE:
2005                         isp1760_writel(temp | PORT_PE, status_reg);
2006                         break;
2007
2008                 case USB_PORT_FEAT_SUSPEND:
2009                         if ((temp & PORT_PE) == 0
2010                                         || (temp & PORT_RESET) != 0)
2011                                 goto error;
2012
2013                         isp1760_writel(temp | PORT_SUSPEND, status_reg);
2014                         break;
2015                 case USB_PORT_FEAT_POWER:
2016                         if (HCS_PPC(priv->hcs_params))
2017                                 isp1760_writel(temp | PORT_POWER,
2018                                                 status_reg);
2019                         break;
2020                 case USB_PORT_FEAT_RESET:
2021                         if (temp & PORT_RESUME)
2022                                 goto error;
2023                         /* line status bits may report this as low speed,
2024                          * which can be fine if this root hub has a
2025                          * transaction translator built in.
2026                          */
2027                         if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
2028                                         && PORT_USB11(temp)) {
2029                                 temp |= PORT_OWNER;
2030                         } else {
2031                                 temp |= PORT_RESET;
2032                                 temp &= ~PORT_PE;
2033
2034                                 /*
2035                                  * caller must wait, then call GetPortStatus
2036                                  * usb 2.0 spec says 50 ms resets on root
2037                                  */
2038                                 priv->reset_done = jiffies +
2039                                         msecs_to_jiffies(50);
2040                         }
2041                         isp1760_writel(temp, status_reg);
2042                         break;
2043                 default:
2044                         goto error;
2045                 }
2046                 isp1760_readl(hcd->regs + HC_USBCMD);
2047                 break;
2048
2049         default:
2050 error:
2051                 /* "stall" on error */
2052                 retval = -EPIPE;
2053         }
2054         spin_unlock_irqrestore(&priv->lock, flags);
2055         return retval;
2056 }
2057
2058 static void isp1760_endpoint_disable(struct usb_hcd *usb_hcd,
2059                 struct usb_host_endpoint *ep)
2060 {
2061         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
2062         struct isp1760_qh *qh;
2063         struct isp1760_qtd *qtd;
2064         u32 flags;
2065
2066         spin_lock_irqsave(&priv->lock, flags);
2067         qh = ep->hcpriv;
2068         if (!qh)
2069                 goto out;
2070
2071         ep->hcpriv = NULL;
2072         do {
2073                 /* more than entry might get removed */
2074                 if (list_empty(&qh->qtd_list))
2075                         break;
2076
2077                 qtd = list_first_entry(&qh->qtd_list, struct isp1760_qtd,
2078                                 qtd_list);
2079
2080                 if (qtd->status & URB_ENQUEUED) {
2081
2082                         spin_unlock_irqrestore(&priv->lock, flags);
2083                         isp1760_urb_dequeue(usb_hcd, qtd->urb, -ECONNRESET);
2084                         spin_lock_irqsave(&priv->lock, flags);
2085                 } else {
2086                         struct urb *urb;
2087
2088                         urb = qtd->urb;
2089                         clean_up_qtdlist(qtd);
2090                         isp1760_urb_done(priv, urb, -ECONNRESET);
2091                 }
2092         } while (1);
2093
2094         qh_destroy(qh);
2095         /* remove requests and leak them.
2096          * ATL are pretty fast done, INT could take a while...
2097          * The latter shoule be removed
2098          */
2099 out:
2100         spin_unlock_irqrestore(&priv->lock, flags);
2101 }
2102
2103 static int isp1760_get_frame(struct usb_hcd *hcd)
2104 {
2105         struct isp1760_hcd *priv = hcd_to_priv(hcd);
2106         u32 fr;
2107
2108         fr = isp1760_readl(hcd->regs + HC_FRINDEX);
2109         return (fr >> 3) % priv->periodic_size;
2110 }
2111
2112 static void isp1760_stop(struct usb_hcd *hcd)
2113 {
2114         struct isp1760_hcd *priv = hcd_to_priv(hcd);
2115
2116         isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1,
2117                         NULL, 0);
2118         mdelay(20);
2119
2120         spin_lock_irq(&priv->lock);
2121         ehci_reset(priv);
2122         /* Disable IRQ */
2123         isp1760_writel(HW_DATA_BUS_32BIT, hcd->regs + HC_HW_MODE_CTRL);
2124         spin_unlock_irq(&priv->lock);
2125
2126         isp1760_writel(0, hcd->regs + HC_CONFIGFLAG);
2127 }
2128
2129 static void isp1760_shutdown(struct usb_hcd *hcd)
2130 {
2131         u32 command;
2132
2133         isp1760_stop(hcd);
2134         isp1760_writel(HW_DATA_BUS_32BIT, hcd->regs + HC_HW_MODE_CTRL);
2135
2136         command = isp1760_readl(hcd->regs + HC_USBCMD);
2137         command &= ~CMD_RUN;
2138         isp1760_writel(command, hcd->regs + HC_USBCMD);
2139 }
2140
2141 static const struct hc_driver isp1760_hc_driver = {
2142         .description            = "isp1760-hcd",
2143         .product_desc           = "NXP ISP1760 USB Host Controller",
2144         .hcd_priv_size          = sizeof(struct isp1760_hcd),
2145         .irq                    = isp1760_irq,
2146         .flags                  = HCD_MEMORY | HCD_USB2,
2147         .reset                  = isp1760_hc_setup,
2148         .start                  = isp1760_run,
2149         .stop                   = isp1760_stop,
2150         .shutdown               = isp1760_shutdown,
2151         .urb_enqueue            = isp1760_urb_enqueue,
2152         .urb_dequeue            = isp1760_urb_dequeue,
2153         .endpoint_disable       = isp1760_endpoint_disable,
2154         .get_frame_number       = isp1760_get_frame,
2155         .hub_status_data        = isp1760_hub_status_data,
2156         .hub_control            = isp1760_hub_control,
2157 };
2158
2159 int __init init_kmem_once(void)
2160 {
2161         qtd_cachep = kmem_cache_create("isp1760_qtd",
2162                         sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY |
2163                         SLAB_MEM_SPREAD, NULL);
2164
2165         if (!qtd_cachep)
2166                 return -ENOMEM;
2167
2168         qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh),
2169                         0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL);
2170
2171         if (!qh_cachep) {
2172                 kmem_cache_destroy(qtd_cachep);
2173                 return -ENOMEM;
2174         }
2175
2176         return 0;
2177 }
2178
2179 void deinit_kmem_cache(void)
2180 {
2181         kmem_cache_destroy(qtd_cachep);
2182         kmem_cache_destroy(qh_cachep);
2183 }
2184
2185 struct usb_hcd *isp1760_register(u64 res_start, u64 res_len, int irq,
2186                 u64 irqflags, struct device *dev, const char *busname)
2187 {
2188         struct usb_hcd *hcd;
2189         struct isp1760_hcd *priv;
2190         int ret;
2191
2192         if (usb_disabled())
2193                 return ERR_PTR(-ENODEV);
2194
2195         /* prevent usb-core allocating DMA pages */
2196         dev->dma_mask = NULL;
2197
2198         hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev->bus_id);
2199         if (!hcd)
2200                 return ERR_PTR(-ENOMEM);
2201
2202         priv = hcd_to_priv(hcd);
2203         init_memory(priv);
2204         hcd->regs = ioremap(res_start, res_len);
2205         if (!hcd->regs) {
2206                 ret = -EIO;
2207                 goto err_put;
2208         }
2209
2210         ret = usb_add_hcd(hcd, irq, irqflags);
2211         if (ret)
2212                 goto err_unmap;
2213
2214         hcd->irq = irq;
2215         hcd->rsrc_start = res_start;
2216         hcd->rsrc_len = res_len;
2217
2218         return hcd;
2219
2220 err_unmap:
2221          iounmap(hcd->regs);
2222
2223 err_put:
2224          usb_put_hcd(hcd);
2225
2226          return ERR_PTR(ret);
2227 }
2228
2229 MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
2230 MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
2231 MODULE_LICENSE("GPL v2");