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         unsigned int            devflags;
  42 };
  43
  44 static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
  45 {
  46         return (struct isp1760_hcd *) (hcd->hcd_priv);
  47 }
  48 static inline struct usb_hcd *priv_to_hcd(struct isp1760_hcd *priv)
  49 {
  50         return container_of((void *) priv, struct usb_hcd, hcd_priv);
  51 }
  52
  53 /* Section 2.2 Host Controller Capability Registers */
  54 #define HC_LENGTH(p)            (((p)>>00)&0x00ff)      /* bits 7:0 */
  55 #define HC_VERSION(p)           (((p)>>16)&0xffff)      /* bits 31:16 */
  56 #define HCS_INDICATOR(p)        ((p)&(1 << 16)) /* true: has port indicators */
  57 #define HCS_PPC(p)              ((p)&(1 << 4))  /* true: port power control */
  58 #define HCS_N_PORTS(p)          (((p)>>0)&0xf)  /* bits 3:0, ports on HC */
  59 #define HCC_ISOC_CACHE(p)       ((p)&(1 << 7))  /* true: can cache isoc frame */
  60 #define HCC_ISOC_THRES(p)       (((p)>>4)&0x7)  /* bits 6:4, uframes cached */
  61
  62 /* Section 2.3 Host Controller Operational Registers */
  63 #define CMD_LRESET      (1<<7)          /* partial reset (no ports, etc) */
  64 #define CMD_RESET       (1<<1)          /* reset HC not bus */
  65 #define CMD_RUN         (1<<0)          /* start/stop HC */
  66 #define STS_PCD         (1<<2)          /* port change detect */
  67 #define FLAG_CF         (1<<0)          /* true: we'll support "high speed" */
  68
  69 #define PORT_OWNER      (1<<13)         /* true: companion hc owns this port */
  70 #define PORT_POWER      (1<<12)         /* true: has power (see PPC) */
  71 #define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10))  /* USB 1.1 device */
  72 #define PORT_RESET      (1<<8)          /* reset port */
  73 #define PORT_SUSPEND    (1<<7)          /* suspend port */
  74 #define PORT_RESUME     (1<<6)          /* resume it */
  75 #define PORT_PE         (1<<2)          /* port enable */
  76 #define PORT_CSC        (1<<1)          /* connect status change */
  77 #define PORT_CONNECT    (1<<0)          /* device connected */
  78 #define PORT_RWC_BITS   (PORT_CSC)
  79
  80 struct isp1760_qtd {
  81         struct isp1760_qtd *hw_next;
  82         u8 packet_type;
  83         u8 toggle;
  84
  85         void *data_buffer;
  86         /* the rest is HCD-private */
  87         struct list_head qtd_list;
  88         struct urb *urb;
  89         size_t length;
  90
  91         /* isp special*/
  92         u32 status;
  93 #define URB_COMPLETE_NOTIFY     (1 << 0)
  94 #define URB_ENQUEUED            (1 << 1)
  95 #define URB_TYPE_ATL            (1 << 2)
  96 #define URB_TYPE_INT            (1 << 3)
  97 };
  98
  99 struct isp1760_qh {
 100         /* first part defined by EHCI spec */
 101         struct list_head qtd_list;
 102         struct isp1760_hcd *priv;
 103
 104         /* periodic schedule info */
 105         unsigned short period;          /* polling interval */
 106         struct usb_device *dev;
 107
 108         u32 toggle;
 109         u32 ping;
 110 };
 111
 112 #define ehci_port_speed(priv, portsc) (1 << USB_PORT_FEAT_HIGHSPEED)
 113
 114 static unsigned int isp1760_readl(__u32 __iomem *regs)
 115 {
 116         return readl(regs);
 117 }
 118
 119 static void isp1760_writel(const unsigned int val, __u32 __iomem *regs)
 120 {
 121         writel(val, regs);
 122 }
 123
 124 /*
 125  * The next two copy via MMIO data to/from the device. memcpy_{to|from}io()
 126  * doesn't quite work because some people have to enforce 32-bit access
 127  */
 128 static void priv_read_copy(struct isp1760_hcd *priv, u32 *src,
 129                 __u32 __iomem *dst, u32 offset, u32 len)
 130 {
 131         struct usb_hcd *hcd = priv_to_hcd(priv);
 132         u32 val;
 133         u8 *buff8;
 134
 135         if (!src) {
 136                 printk(KERN_ERR "ERROR: buffer: %p len: %d\n", src, len);
 137                 return;
 138         }
 139         isp1760_writel(offset,  hcd->regs + HC_MEMORY_REG);
 140         /* XXX
 141          * 90nsec delay, the spec says something how this could be avoided.
 142          */
 143         mdelay(1);
 144
 145         while (len >= 4) {
 146                 *src = __raw_readl(dst);
 147                 len -= 4;
 148                 src++;
 149                 dst++;
 150         }
 151
 152         if (!len)
 153                 return;
 154
 155         /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
 156          * allocated.
 157          */
 158         val = isp1760_readl(dst);
 159
 160         buff8 = (u8 *)src;
 161         while (len) {
 162
 163                 *buff8 = val;
 164                 val >>= 8;
 165                 len--;
 166                 buff8++;
 167         }
 168 }
 169
 170 static void priv_write_copy(const struct isp1760_hcd *priv, const u32 *src,
 171                 __u32 __iomem *dst, u32 len)
 172 {
 173         while (len >= 4) {
 174                 __raw_writel(*src, dst);
 175                 len -= 4;
 176                 src++;
 177                 dst++;
 178         }
 179
 180         if (!len)
 181                 return;
 182         /* in case we have 3, 2 or 1 by left. The buffer is allocated and the
 183          * extra bytes should not be read by the HW
 184          */
 185
 186         __raw_writel(*src, dst);
 187 }
 188
 189 /* memory management of the 60kb on the chip from 0x1000 to 0xffff */
 190 static void init_memory(struct isp1760_hcd *priv)
 191 {
 192         int i;
 193         u32 payload;
 194
 195         payload = 0x1000;
 196         for (i = 0; i < BLOCK_1_NUM; i++) {
 197                 priv->memory_pool[i].start = payload;
 198                 priv->memory_pool[i].size = BLOCK_1_SIZE;
 199                 priv->memory_pool[i].free = 1;
 200                 payload += priv->memory_pool[i].size;
 201         }
 202
 203
 204         for (i = BLOCK_1_NUM; i < BLOCK_1_NUM + BLOCK_2_NUM; i++) {
 205                 priv->memory_pool[i].start = payload;
 206                 priv->memory_pool[i].size = BLOCK_2_SIZE;
 207                 priv->memory_pool[i].free = 1;
 208                 payload += priv->memory_pool[i].size;
 209         }
 210
 211
 212         for (i = BLOCK_1_NUM + BLOCK_2_NUM; i < BLOCKS; i++) {
 213                 priv->memory_pool[i].start = payload;
 214                 priv->memory_pool[i].size = BLOCK_3_SIZE;
 215                 priv->memory_pool[i].free = 1;
 216                 payload += priv->memory_pool[i].size;
 217         }
 218
 219         BUG_ON(payload - priv->memory_pool[i - 1].size > PAYLOAD_SIZE);
 220 }
 221
 222 static u32 alloc_mem(struct isp1760_hcd *priv, u32 size)
 223 {
 224         int i;
 225
 226         if (!size)
 227                 return ISP1760_NULL_POINTER;
 228
 229         for (i = 0; i < BLOCKS; i++) {
 230                 if (priv->memory_pool[i].size >= size &&
 231                                 priv->memory_pool[i].free) {
 232
 233                         priv->memory_pool[i].free = 0;
 234                         return priv->memory_pool[i].start;
 235                 }
 236         }
 237
 238         printk(KERN_ERR "ISP1760 MEM: can not allocate %d bytes of memory\n",
 239                         size);
 240         printk(KERN_ERR "Current memory map:\n");
 241         for (i = 0; i < BLOCKS; i++) {
 242                 printk(KERN_ERR "Pool %2d size %4d status: %d\n",
 243                                 i, priv->memory_pool[i].size,
 244                                 priv->memory_pool[i].free);
 245         }
 246         /* XXX maybe -ENOMEM could be possible */
 247         BUG();
 248         return 0;
 249 }
 250
 251 static void free_mem(struct isp1760_hcd *priv, u32 mem)
 252 {
 253         int i;
 254
 255         if (mem == ISP1760_NULL_POINTER)
 256                 return;
 257
 258         for (i = 0; i < BLOCKS; i++) {
 259                 if (priv->memory_pool[i].start == mem) {
 260
 261                         BUG_ON(priv->memory_pool[i].free);
 262
 263                         priv->memory_pool[i].free = 1;
 264                         return ;
 265                 }
 266         }
 267
 268         printk(KERN_ERR "Trying to free not-here-allocated memory :%08x\n",
 269                         mem);
 270         BUG();
 271 }
 272
 273 static void isp1760_init_regs(struct usb_hcd *hcd)
 274 {
 275         isp1760_writel(0, hcd->regs + HC_BUFFER_STATUS_REG);
 276         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
 277                         HC_ATL_PTD_SKIPMAP_REG);
 278         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
 279                         HC_INT_PTD_SKIPMAP_REG);
 280         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
 281                         HC_ISO_PTD_SKIPMAP_REG);
 282
 283         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
 284                         HC_ATL_PTD_DONEMAP_REG);
 285         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
 286                         HC_INT_PTD_DONEMAP_REG);
 287         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
 288                         HC_ISO_PTD_DONEMAP_REG);
 289 }
 290
 291 static int handshake(struct isp1760_hcd *priv, void __iomem *ptr,
 292                       u32 mask, u32 done, int usec)
 293 {
 294         u32 result;
 295
 296         do {
 297                 result = isp1760_readl(ptr);
 298                 if (result == ~0)
 299                         return -ENODEV;
 300                 result &= mask;
 301                 if (result == done)
 302                         return 0;
 303                 udelay(1);
 304                 usec--;
 305         } while (usec > 0);
 306         return -ETIMEDOUT;
 307 }
 308
 309 /* reset a non-running (STS_HALT == 1) controller */
 310 static int ehci_reset(struct isp1760_hcd *priv)
 311 {
 312         int retval;
 313         struct usb_hcd *hcd = priv_to_hcd(priv);
 314         u32 command = isp1760_readl(hcd->regs + HC_USBCMD);
 315
 316         command |= CMD_RESET;
 317         isp1760_writel(command, hcd->regs + HC_USBCMD);
 318         hcd->state = HC_STATE_HALT;
 319         priv->next_statechange = jiffies;
 320         retval = handshake(priv, hcd->regs + HC_USBCMD,
 321                             CMD_RESET, 0, 250 * 1000);
 322         return retval;
 323 }
 324
 325 static void qh_destroy(struct isp1760_qh *qh)
 326 {
 327         BUG_ON(!list_empty(&qh->qtd_list));
 328         kmem_cache_free(qh_cachep, qh);
 329 }
 330
 331 static struct isp1760_qh *isp1760_qh_alloc(struct isp1760_hcd *priv,
 332                 gfp_t flags)
 333 {
 334         struct isp1760_qh *qh;
 335
 336         qh = kmem_cache_zalloc(qh_cachep, flags);
 337         if (!qh)
 338                 return qh;
 339
 340         INIT_LIST_HEAD(&qh->qtd_list);
 341         qh->priv = priv;
 342         return qh;
 343 }
 344
 345 /* magic numbers that can affect system performance */
 346 #define EHCI_TUNE_CERR          3       /* 0-3 qtd retries; 0 == don't stop */
 347 #define EHCI_TUNE_RL_HS         4       /* nak throttle; see 4.9 */
 348 #define EHCI_TUNE_RL_TT         0
 349 #define EHCI_TUNE_MULT_HS       1       /* 1-3 transactions/uframe; 4.10.3 */
 350 #define EHCI_TUNE_MULT_TT       1
 351 #define EHCI_TUNE_FLS           2       /* (small) 256 frame schedule */
 352
 353 /* one-time init, only for memory state */
 354 static int priv_init(struct usb_hcd *hcd)
 355 {
 356         struct isp1760_hcd              *priv = hcd_to_priv(hcd);
 357         u32                     hcc_params;
 358
 359         spin_lock_init(&priv->lock);
 360
 361         /*
 362          * hw default: 1K periodic list heads, one per frame.
 363          * periodic_size can shrink by USBCMD update if hcc_params allows.
 364          */
 365         priv->periodic_size = DEFAULT_I_TDPS;
 366
 367         /* controllers may cache some of the periodic schedule ... */
 368         hcc_params = isp1760_readl(hcd->regs + HC_HCCPARAMS);
 369         /* full frame cache */
 370         if (HCC_ISOC_CACHE(hcc_params))
 371                 priv->i_thresh = 8;
 372         else /* N microframes cached */
 373                 priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
 374
 375         return 0;
 376 }
 377
 378 static int isp1760_hc_setup(struct usb_hcd *hcd)
 379 {
 380         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 381         int result;
 382         u32 scratch, hwmode;
 383
 384         /* Setup HW Mode Control: This assumes a level active-low interrupt */
 385         hwmode = HW_DATA_BUS_32BIT;
 386
 387         if (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16)
 388                 hwmode &= ~HW_DATA_BUS_32BIT;
 389         if (priv->devflags & ISP1760_FLAG_ANALOG_OC)
 390                 hwmode |= HW_ANA_DIGI_OC;
 391         if (priv->devflags & ISP1760_FLAG_DACK_POL_HIGH)
 392                 hwmode |= HW_DACK_POL_HIGH;
 393         if (priv->devflags & ISP1760_FLAG_DREQ_POL_HIGH)
 394                 hwmode |= HW_DREQ_POL_HIGH;
 395
 396         /*
 397          * We have to set this first in case we're in 16-bit mode.
 398          * Write it twice to ensure correct upper bits if switching
 399          * to 16-bit mode.
 400          */
 401         isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
 402         isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
 403
 404         isp1760_writel(0xdeadbabe, hcd->regs + HC_SCRATCH_REG);
 405         /* Change bus pattern */
 406         scratch = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
 407         scratch = isp1760_readl(hcd->regs + HC_SCRATCH_REG);
 408         if (scratch != 0xdeadbabe) {
 409                 printk(KERN_ERR "ISP1760: Scratch test failed.\n");
 410                 return -ENODEV;
 411         }
 412
 413         /* pre reset */
 414         isp1760_init_regs(hcd);
 415
 416         /* reset */
 417         isp1760_writel(SW_RESET_RESET_ALL, hcd->regs + HC_RESET_REG);
 418         mdelay(100);
 419
 420         isp1760_writel(SW_RESET_RESET_HC, hcd->regs + HC_RESET_REG);
 421         mdelay(100);
 422
 423         result = ehci_reset(priv);
 424         if (result)
 425                 return result;
 426
 427         /* Step 11 passed */
 428
 429         isp1760_info(priv, "bus width: %d, oc: %s\n",
 430                            (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16) ?
 431                            16 : 32, (priv->devflags & ISP1760_FLAG_ANALOG_OC) ?
 432                            "analog" : "digital");
 433
 434         /* ATL reset */
 435         isp1760_writel(hwmode | ALL_ATX_RESET, hcd->regs + HC_HW_MODE_CTRL);
 436         mdelay(10);
 437         isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
 438
 439         isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_REG);
 440         isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_ENABLE);
 441
 442         /*
 443          * PORT 1 Control register of the ISP1760 is the OTG control
 444          * register on ISP1761.
 445          */
 446         if (!(priv->devflags & ISP1760_FLAG_ISP1761) &&
 447             !(priv->devflags & ISP1760_FLAG_PORT1_DIS)) {
 448                 isp1760_writel(PORT1_POWER | PORT1_INIT2,
 449                                hcd->regs + HC_PORT1_CTRL);
 450                 mdelay(10);
 451         }
 452
 453         priv->hcs_params = isp1760_readl(hcd->regs + HC_HCSPARAMS);
 454
 455         return priv_init(hcd);
 456 }
 457
 458 static void isp1760_init_maps(struct usb_hcd *hcd)
 459 {
 460         /*set last maps, for iso its only 1, else 32 tds bitmap*/
 461         isp1760_writel(0x80000000, hcd->regs + HC_ATL_PTD_LASTPTD_REG);
 462         isp1760_writel(0x80000000, hcd->regs + HC_INT_PTD_LASTPTD_REG);
 463         isp1760_writel(0x00000001, hcd->regs + HC_ISO_PTD_LASTPTD_REG);
 464 }
 465
 466 static void isp1760_enable_interrupts(struct usb_hcd *hcd)
 467 {
 468         isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_AND_REG);
 469         isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 470         isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_AND_REG);
 471         isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
 472         isp1760_writel(0, hcd->regs + HC_ISO_IRQ_MASK_AND_REG);
 473         isp1760_writel(0xffffffff, hcd->regs + HC_ISO_IRQ_MASK_OR_REG);
 474         /* step 23 passed */
 475 }
 476
 477 static int isp1760_run(struct usb_hcd *hcd)
 478 {
 479         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 480         int retval;
 481         u32 temp;
 482         u32 command;
 483         u32 chipid;
 484
 485         hcd->uses_new_polling = 1;
 486         hcd->poll_rh = 0;
 487
 488         hcd->state = HC_STATE_RUNNING;
 489         isp1760_enable_interrupts(hcd);
 490         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
 491         isp1760_writel(temp | HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
 492
 493         command = isp1760_readl(hcd->regs + HC_USBCMD);
 494         command &= ~(CMD_LRESET|CMD_RESET);
 495         command |= CMD_RUN;
 496         isp1760_writel(command, hcd->regs + HC_USBCMD);
 497
 498         retval = handshake(priv, hcd->regs + HC_USBCMD, CMD_RUN, CMD_RUN,
 499                         250 * 1000);
 500         if (retval)
 501                 return retval;
 502
 503         /*
 504          * XXX
 505          * Spec says to write FLAG_CF as last config action, priv code grabs
 506          * the semaphore while doing so.
 507          */
 508         down_write(&ehci_cf_port_reset_rwsem);
 509         isp1760_writel(FLAG_CF, hcd->regs + HC_CONFIGFLAG);
 510
 511         retval = handshake(priv, hcd->regs + HC_CONFIGFLAG, FLAG_CF, FLAG_CF,
 512                         250 * 1000);
 513         up_write(&ehci_cf_port_reset_rwsem);
 514         if (retval)
 515                 return retval;
 516
 517         chipid = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
 518         isp1760_info(priv, "USB ISP %04x HW rev. %d started\n", chipid & 0xffff,
 519                         chipid >> 16);
 520
 521         /* PTD Register Init Part 2, Step 28 */
 522         /* enable INTs */
 523         isp1760_init_maps(hcd);
 524
 525         /* GRR this is run-once init(), being done every time the HC starts.
 526          * So long as they're part of class devices, we can't do it init()
 527          * since the class device isn't created that early.
 528          */
 529         return 0;
 530 }
 531
 532 static u32 base_to_chip(u32 base)
 533 {
 534         return ((base - 0x400) >> 3);
 535 }
 536
 537 static void transform_into_atl(struct isp1760_hcd *priv, struct isp1760_qh *qh,
 538                         struct isp1760_qtd *qtd, struct urb *urb,
 539                         u32 payload, struct ptd *ptd)
 540 {
 541         u32 dw0;
 542         u32 dw1;
 543         u32 dw2;
 544         u32 dw3;
 545         u32 maxpacket;
 546         u32 multi;
 547         u32 pid_code;
 548         u32 rl = RL_COUNTER;
 549         u32 nak = NAK_COUNTER;
 550
 551         /* according to 3.6.2, max packet len can not be > 0x400 */
 552         maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
 553         multi =  1 + ((maxpacket >> 11) & 0x3);
 554         maxpacket &= 0x7ff;
 555
 556         /* DW0 */
 557         dw0 = PTD_VALID;
 558         dw0 |= PTD_LENGTH(qtd->length);
 559         dw0 |= PTD_MAXPACKET(maxpacket);
 560         dw0 |= PTD_ENDPOINT(usb_pipeendpoint(urb->pipe));
 561         dw1 = usb_pipeendpoint(urb->pipe) >> 1;
 562
 563         /* DW1 */
 564         dw1 |= PTD_DEVICE_ADDR(usb_pipedevice(urb->pipe));
 565
 566         pid_code = qtd->packet_type;
 567         dw1 |= PTD_PID_TOKEN(pid_code);
 568
 569         if (usb_pipebulk(urb->pipe))
 570                 dw1 |= PTD_TRANS_BULK;
 571         else if  (usb_pipeint(urb->pipe))
 572                 dw1 |= PTD_TRANS_INT;
 573
 574         if (urb->dev->speed != USB_SPEED_HIGH) {
 575                 /* split transaction */
 576
 577                 dw1 |= PTD_TRANS_SPLIT;
 578                 if (urb->dev->speed == USB_SPEED_LOW)
 579                         dw1 |= PTD_SE_USB_LOSPEED;
 580
 581                 dw1 |= PTD_PORT_NUM(urb->dev->ttport);
 582                 dw1 |= PTD_HUB_NUM(urb->dev->tt->hub->devnum);
 583
 584                 /* SE bit for Split INT transfers */
 585                 if (usb_pipeint(urb->pipe) &&
 586                                 (urb->dev->speed == USB_SPEED_LOW))
 587                         dw1 |= 2 << 16;
 588
 589                 dw3 = 0;
 590                 rl = 0;
 591                 nak = 0;
 592         } else {
 593                 dw0 |= PTD_MULTI(multi);
 594                 if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe))
 595                         dw3 = qh->ping;
 596                 else
 597                         dw3 = 0;
 598         }
 599         /* DW2 */
 600         dw2 = 0;
 601         dw2 |= PTD_DATA_START_ADDR(base_to_chip(payload));
 602         dw2 |= PTD_RL_CNT(rl);
 603         dw3 |= PTD_NAC_CNT(nak);
 604
 605         /* DW3 */
 606         if (usb_pipecontrol(urb->pipe))
 607                 dw3 |= PTD_DATA_TOGGLE(qtd->toggle);
 608         else
 609                 dw3 |= qh->toggle;
 610
 611
 612         dw3 |= PTD_ACTIVE;
 613         /* Cerr */
 614         dw3 |= PTD_CERR(ERR_COUNTER);
 615
 616         memset(ptd, 0, sizeof(*ptd));
 617
 618         ptd->dw0 = cpu_to_le32(dw0);
 619         ptd->dw1 = cpu_to_le32(dw1);
 620         ptd->dw2 = cpu_to_le32(dw2);
 621         ptd->dw3 = cpu_to_le32(dw3);
 622 }
 623
 624 static void transform_add_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
 625                         struct isp1760_qtd *qtd, struct urb *urb,
 626                         u32 payload, struct ptd *ptd)
 627 {
 628         u32 maxpacket;
 629         u32 multi;
 630         u32 numberofusofs;
 631         u32 i;
 632         u32 usofmask, usof;
 633         u32 period;
 634
 635         maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
 636         multi =  1 + ((maxpacket >> 11) & 0x3);
 637         maxpacket &= 0x7ff;
 638         /* length of the data per uframe */
 639         maxpacket = multi * maxpacket;
 640
 641         numberofusofs = urb->transfer_buffer_length / maxpacket;
 642         if (urb->transfer_buffer_length % maxpacket)
 643                 numberofusofs += 1;
 644
 645         usofmask = 1;
 646         usof = 0;
 647         for (i = 0; i < numberofusofs; i++) {
 648                 usof |= usofmask;
 649                 usofmask <<= 1;
 650         }
 651
 652         if (urb->dev->speed != USB_SPEED_HIGH) {
 653                 /* split */
 654                 ptd->dw5 = __constant_cpu_to_le32(0x1c);
 655
 656                 if (qh->period >= 32)
 657                         period = qh->period / 2;
 658                 else
 659                         period = qh->period;
 660
 661         } else {
 662
 663                 if (qh->period >= 8)
 664                         period = qh->period/8;
 665                 else
 666                         period = qh->period;
 667
 668                 if (period >= 32)
 669                         period  = 16;
 670
 671                 if (qh->period >= 8) {
 672                         /* millisecond period */
 673                         period = (period << 3);
 674                 } else {
 675                         /* usof based tranmsfers */
 676                         /* minimum 4 usofs */
 677                         usof = 0x11;
 678                 }
 679         }
 680
 681         ptd->dw2 |= cpu_to_le32(period);
 682         ptd->dw4 = cpu_to_le32(usof);
 683 }
 684
 685 static void transform_into_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
 686                         struct isp1760_qtd *qtd, struct urb *urb,
 687                         u32 payload, struct ptd *ptd)
 688 {
 689         transform_into_atl(priv, qh, qtd, urb, payload, ptd);
 690         transform_add_int(priv, qh, qtd, urb,  payload, ptd);
 691 }
 692
 693 static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len,
 694                 u32 token)
 695 {
 696         int count;
 697
 698         qtd->data_buffer = databuffer;
 699         qtd->packet_type = GET_QTD_TOKEN_TYPE(token);
 700         qtd->toggle = GET_DATA_TOGGLE(token);
 701
 702         if (len > HC_ATL_PL_SIZE)
 703                 count = HC_ATL_PL_SIZE;
 704         else
 705                 count = len;
 706
 707         qtd->length = count;
 708         return count;
 709 }
 710
 711 static int check_error(struct ptd *ptd)
 712 {
 713         int error = 0;
 714         u32 dw3;
 715
 716         dw3 = le32_to_cpu(ptd->dw3);
 717         if (dw3 & DW3_HALT_BIT)
 718                 error = -EPIPE;
 719
 720         if (dw3 & DW3_ERROR_BIT) {
 721                 printk(KERN_ERR "error bit is set in DW3\n");
 722                 error = -EPIPE;
 723         }
 724
 725         if (dw3 & DW3_QTD_ACTIVE) {
 726                 printk(KERN_ERR "transfer active bit is set DW3\n");
 727                 printk(KERN_ERR "nak counter: %d, rl: %d\n", (dw3 >> 19) & 0xf,
 728                                 (le32_to_cpu(ptd->dw2) >> 25) & 0xf);
 729         }
 730
 731         return error;
 732 }
 733
 734 static void check_int_err_status(u32 dw4)
 735 {
 736         u32 i;
 737
 738         dw4 >>= 8;
 739
 740         for (i = 0; i < 8; i++) {
 741                 switch (dw4 & 0x7) {
 742                 case INT_UNDERRUN:
 743                         printk(KERN_ERR "ERROR: under run , %d\n", i);
 744                         break;
 745
 746                 case INT_EXACT:
 747                         printk(KERN_ERR "ERROR: transaction error, %d\n", i);
 748                         break;
 749
 750                 case INT_BABBLE:
 751                         printk(KERN_ERR "ERROR: babble error, %d\n", i);
 752                         break;
 753                 }
 754                 dw4 >>= 3;
 755         }
 756 }
 757
 758 static void enqueue_one_qtd(struct isp1760_qtd *qtd, struct isp1760_hcd *priv,
 759                 u32 payload)
 760 {
 761         u32 token;
 762         struct usb_hcd *hcd = priv_to_hcd(priv);
 763
 764         token = qtd->packet_type;
 765
 766         if (qtd->length && (qtd->length <= HC_ATL_PL_SIZE)) {
 767                 switch (token) {
 768                 case IN_PID:
 769                         break;
 770                 case OUT_PID:
 771                 case SETUP_PID:
 772                         priv_write_copy(priv, qtd->data_buffer,
 773                                         hcd->regs + payload,
 774                                         qtd->length);
 775                 }
 776         }
 777 }
 778
 779 static void enqueue_one_atl_qtd(u32 atl_regs, u32 payload,
 780                 struct isp1760_hcd *priv, struct isp1760_qh *qh,
 781                 struct urb *urb, u32 slot, struct isp1760_qtd *qtd)
 782 {
 783         struct ptd ptd;
 784         struct usb_hcd *hcd = priv_to_hcd(priv);
 785
 786         transform_into_atl(priv, qh, qtd, urb, payload, &ptd);
 787         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + atl_regs, sizeof(ptd));
 788         enqueue_one_qtd(qtd, priv, payload);
 789
 790         priv->atl_ints[slot].urb = urb;
 791         priv->atl_ints[slot].qh = qh;
 792         priv->atl_ints[slot].qtd = qtd;
 793         priv->atl_ints[slot].data_buffer = qtd->data_buffer;
 794         priv->atl_ints[slot].payload = payload;
 795         qtd->status |= URB_ENQUEUED | URB_TYPE_ATL;
 796         qtd->status |= slot << 16;
 797 }
 798
 799 static void enqueue_one_int_qtd(u32 int_regs, u32 payload,
 800                 struct isp1760_hcd *priv, struct isp1760_qh *qh,
 801                 struct urb *urb, u32 slot,  struct isp1760_qtd *qtd)
 802 {
 803         struct ptd ptd;
 804         struct usb_hcd *hcd = priv_to_hcd(priv);
 805
 806         transform_into_int(priv, qh, qtd, urb, payload, &ptd);
 807         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + int_regs, sizeof(ptd));
 808         enqueue_one_qtd(qtd, priv, payload);
 809
 810         priv->int_ints[slot].urb = urb;
 811         priv->int_ints[slot].qh = qh;
 812         priv->int_ints[slot].qtd = qtd;
 813         priv->int_ints[slot].data_buffer = qtd->data_buffer;
 814         priv->int_ints[slot].payload = payload;
 815         qtd->status |= URB_ENQUEUED | URB_TYPE_INT;
 816         qtd->status |= slot << 16;
 817 }
 818
 819 static void enqueue_an_ATL_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 atl_regs, payload;
 827         u32 buffstatus;
 828
 829         skip_map = isp1760_readl(hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
 830
 831         BUG_ON(!skip_map);
 832         slot = __ffs(skip_map);
 833         queue_entry = 1 << slot;
 834
 835         atl_regs = ATL_REGS_OFFSET + slot * sizeof(struct ptd);
 836
 837         payload = alloc_mem(priv, qtd->length);
 838
 839         enqueue_one_atl_qtd(atl_regs, payload, priv, qh, qtd->urb, slot, qtd);
 840
 841         or_map = isp1760_readl(hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 842         or_map |= queue_entry;
 843         isp1760_writel(or_map, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 844
 845         skip_map &= ~queue_entry;
 846         isp1760_writel(skip_map, hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
 847
 848         buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
 849         buffstatus |= ATL_BUFFER;
 850         isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
 851 }
 852
 853 static void enqueue_an_INT_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
 854                                   struct isp1760_qtd *qtd)
 855 {
 856         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 857         u32 skip_map, or_map;
 858         u32 queue_entry;
 859         u32 slot;
 860         u32 int_regs, payload;
 861         u32 buffstatus;
 862
 863         skip_map = isp1760_readl(hcd->regs + HC_INT_PTD_SKIPMAP_REG);
 864
 865         BUG_ON(!skip_map);
 866         slot = __ffs(skip_map);
 867         queue_entry = 1 << slot;
 868
 869         int_regs = INT_REGS_OFFSET + slot * sizeof(struct ptd);
 870
 871         payload = alloc_mem(priv, qtd->length);
 872
 873         enqueue_one_int_qtd(int_regs, payload, priv, qh, qtd->urb, slot, qtd);
 874
 875         or_map = isp1760_readl(hcd->regs + HC_INT_IRQ_MASK_OR_REG);
 876         or_map |= queue_entry;
 877         isp1760_writel(or_map, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
 878
 879         skip_map &= ~queue_entry;
 880         isp1760_writel(skip_map, hcd->regs + HC_INT_PTD_SKIPMAP_REG);
 881
 882         buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
 883         buffstatus |= INT_BUFFER;
 884         isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
 885 }
 886
 887 static void isp1760_urb_done(struct isp1760_hcd *priv, struct urb *urb, int status)
 888 __releases(priv->lock)
 889 __acquires(priv->lock)
 890 {
 891         if (!urb->unlinked) {
 892                 if (status == -EINPROGRESS)
 893                         status = 0;
 894         }
 895
 896         /* complete() can reenter this HCD */
 897         usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
 898         spin_unlock(&priv->lock);
 899         usb_hcd_giveback_urb(priv_to_hcd(priv), urb, status);
 900         spin_lock(&priv->lock);
 901 }
 902
 903 static void isp1760_qtd_free(struct isp1760_qtd *qtd)
 904 {
 905         kmem_cache_free(qtd_cachep, qtd);
 906 }
 907
 908 static struct isp1760_qtd *clean_this_qtd(struct isp1760_qtd *qtd)
 909 {
 910         struct isp1760_qtd *tmp_qtd;
 911
 912         tmp_qtd = qtd->hw_next;
 913         list_del(&qtd->qtd_list);
 914         isp1760_qtd_free(qtd);
 915         return tmp_qtd;
 916 }
 917
 918 /*
 919  * Remove this QTD from the QH list and free its memory. If this QTD
 920  * isn't the last one than remove also his successor(s).
 921  * Returns the QTD which is part of an new URB and should be enqueued.
 922  */
 923 static struct isp1760_qtd *clean_up_qtdlist(struct isp1760_qtd *qtd)
 924 {
 925         struct isp1760_qtd *tmp_qtd;
 926         int last_one;
 927
 928         do {
 929                 tmp_qtd = qtd->hw_next;
 930                 last_one = qtd->status & URB_COMPLETE_NOTIFY;
 931                 list_del(&qtd->qtd_list);
 932                 isp1760_qtd_free(qtd);
 933                 qtd = tmp_qtd;
 934         } while (!last_one && qtd);
 935
 936         return qtd;
 937 }
 938
 939 static void do_atl_int(struct usb_hcd *usb_hcd)
 940 {
 941         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
 942         u32 done_map, skip_map;
 943         struct ptd ptd;
 944         struct urb *urb = NULL;
 945         u32 atl_regs_base;
 946         u32 atl_regs;
 947         u32 queue_entry;
 948         u32 payload;
 949         u32 length;
 950         u32 or_map;
 951         u32 status = -EINVAL;
 952         int error;
 953         struct isp1760_qtd *qtd;
 954         struct isp1760_qh *qh;
 955         u32 rl;
 956         u32 nakcount;
 957
 958         done_map = isp1760_readl(usb_hcd->regs +
 959                         HC_ATL_PTD_DONEMAP_REG);
 960         skip_map = isp1760_readl(usb_hcd->regs +
 961                         HC_ATL_PTD_SKIPMAP_REG);
 962
 963         or_map = isp1760_readl(usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 964         or_map &= ~done_map;
 965         isp1760_writel(or_map, usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 966
 967         atl_regs_base = ATL_REGS_OFFSET;
 968         while (done_map) {
 969                 u32 dw1;
 970                 u32 dw2;
 971                 u32 dw3;
 972
 973                 status = 0;
 974
 975                 queue_entry = __ffs(done_map);
 976                 done_map &= ~(1 << queue_entry);
 977                 skip_map |= 1 << queue_entry;
 978
 979                 atl_regs = atl_regs_base + queue_entry * sizeof(struct ptd);
 980
 981                 urb = priv->atl_ints[queue_entry].urb;
 982                 qtd = priv->atl_ints[queue_entry].qtd;
 983                 qh = priv->atl_ints[queue_entry].qh;
 984                 payload = priv->atl_ints[queue_entry].payload;
 985
 986                 if (!qh) {
 987                         printk(KERN_ERR "qh is 0\n");
 988                         continue;
 989                 }
 990                 priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + atl_regs,
 991                                 atl_regs, sizeof(ptd));
 992
 993                 dw1 = le32_to_cpu(ptd.dw1);
 994                 dw2 = le32_to_cpu(ptd.dw2);
 995                 dw3 = le32_to_cpu(ptd.dw3);
 996                 rl = (dw2 >> 25) & 0x0f;
 997                 nakcount = (dw3 >> 19) & 0xf;
 998
 999                 /* Transfer Error, *but* active and no HALT -> reload */
1000                 if ((dw3 & DW3_ERROR_BIT) && (dw3 & DW3_QTD_ACTIVE) &&
1001                                 !(dw3 & DW3_HALT_BIT)) {
1002
1003                         /* according to ppriv code, we have to
1004                          * reload this one if trasfered bytes != requested bytes
1005                          * else act like everything went smooth..
1006                          * XXX This just doesn't feel right and hasn't
1007                          * triggered so far.
1008                          */
1009
1010                         length = PTD_XFERRED_LENGTH(dw3);
1011                         printk(KERN_ERR "Should reload now.... transfered %d "
1012                                         "of %zu\n", length, qtd->length);
1013                         BUG();
1014                 }
1015
1016                 if (!nakcount && (dw3 & DW3_QTD_ACTIVE)) {
1017                         u32 buffstatus;
1018
1019                         /* XXX
1020                          * NAKs are handled in HW by the chip. Usually if the
1021                          * device is not able to send data fast enough.
1022                          * This did not trigger for a long time now.
1023                          */
1024                         printk(KERN_ERR "Reloading ptd %p/%p... qh %p readed: "
1025                                         "%d of %zu done: %08x cur: %08x\n", qtd,
1026                                         urb, qh, PTD_XFERRED_LENGTH(dw3),
1027                                         qtd->length, done_map,
1028                                         (1 << queue_entry));
1029
1030                         /* RL counter = ERR counter */
1031                         dw3 &= ~(0xf << 19);
1032                         dw3 |= rl << 19;
1033                         dw3 &= ~(3 << (55 - 32));
1034                         dw3 |= ERR_COUNTER << (55 - 32);
1035
1036                         /*
1037                          * It is not needed to write skip map back because it
1038                          * is unchanged. Just make sure that this entry is
1039                          * unskipped once it gets written to the HW.
1040                          */
1041                         skip_map &= ~(1 << queue_entry);
1042                         or_map = isp1760_readl(usb_hcd->regs +
1043                                         HC_ATL_IRQ_MASK_OR_REG);
1044                         or_map |= 1 << queue_entry;
1045                         isp1760_writel(or_map, usb_hcd->regs +
1046                                         HC_ATL_IRQ_MASK_OR_REG);
1047
1048                         ptd.dw3 = cpu_to_le32(dw3);
1049                         priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
1050                                         atl_regs, sizeof(ptd));
1051
1052                         ptd.dw0 |= __constant_cpu_to_le32(PTD_VALID);
1053                         priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
1054                                         atl_regs, sizeof(ptd));
1055
1056                         buffstatus = isp1760_readl(usb_hcd->regs +
1057                                         HC_BUFFER_STATUS_REG);
1058                         buffstatus |= ATL_BUFFER;
1059                         isp1760_writel(buffstatus, usb_hcd->regs +
1060                                         HC_BUFFER_STATUS_REG);
1061                         continue;
1062                 }
1063
1064                 error = check_error(&ptd);
1065                 if (error) {
1066                         status = error;
1067                         priv->atl_ints[queue_entry].qh->toggle = 0;
1068                         priv->atl_ints[queue_entry].qh->ping = 0;
1069                         urb->status = -EPIPE;
1070
1071 #if 0
1072                         printk(KERN_ERR "Error in %s().\n", __func__);
1073                         printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1074                                         "dw3: %08x dw4: %08x dw5: %08x dw6: "
1075                                         "%08x dw7: %08x\n",
1076                                         ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1077                                         ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1078 #endif
1079                 } else {
1080                         if (usb_pipetype(urb->pipe) == PIPE_BULK) {
1081                                 priv->atl_ints[queue_entry].qh->toggle = dw3 &
1082                                         (1 << 25);
1083                                 priv->atl_ints[queue_entry].qh->ping = dw3 &
1084                                         (1 << 26);
1085                         }
1086                 }
1087
1088                 length = PTD_XFERRED_LENGTH(dw3);
1089                 if (length) {
1090                         switch (DW1_GET_PID(dw1)) {
1091                         case IN_PID:
1092                                 priv_read_copy(priv,
1093                                         priv->atl_ints[queue_entry].data_buffer,
1094                                         usb_hcd->regs + payload, payload,
1095                                         length);
1096
1097                         case OUT_PID:
1098
1099                                 urb->actual_length += length;
1100
1101                         case SETUP_PID:
1102                                 break;
1103                         }
1104                 }
1105
1106                 priv->atl_ints[queue_entry].data_buffer = NULL;
1107                 priv->atl_ints[queue_entry].urb = NULL;
1108                 priv->atl_ints[queue_entry].qtd = NULL;
1109                 priv->atl_ints[queue_entry].qh = NULL;
1110
1111                 free_mem(priv, payload);
1112
1113                 isp1760_writel(skip_map, usb_hcd->regs +
1114                                 HC_ATL_PTD_SKIPMAP_REG);
1115
1116                 if (urb->status == -EPIPE) {
1117                         /* HALT was received */
1118
1119                         qtd = clean_up_qtdlist(qtd);
1120                         isp1760_urb_done(priv, urb, urb->status);
1121
1122                 } else if (usb_pipebulk(urb->pipe) && (length < qtd->length)) {
1123                         /* short BULK received */
1124
1125                         printk(KERN_ERR "short bulk, %d instead %zu\n", length,
1126                                         qtd->length);
1127                         if (urb->transfer_flags & URB_SHORT_NOT_OK) {
1128                                 urb->status = -EREMOTEIO;
1129                                 printk(KERN_ERR "not okey\n");
1130                         }
1131
1132                         if (urb->status == -EINPROGRESS)
1133                                 urb->status = 0;
1134
1135                         qtd = clean_up_qtdlist(qtd);
1136
1137                         isp1760_urb_done(priv, urb, urb->status);
1138
1139                 } else if (qtd->status & URB_COMPLETE_NOTIFY) {
1140                         /* that was the last qtd of that URB */
1141
1142                         if (urb->status == -EINPROGRESS)
1143                                 urb->status = 0;
1144
1145                         qtd = clean_this_qtd(qtd);
1146                         isp1760_urb_done(priv, urb, urb->status);
1147
1148                 } else {
1149                         /* next QTD of this URB */
1150
1151                         qtd = clean_this_qtd(qtd);
1152                         BUG_ON(!qtd);
1153                 }
1154
1155                 if (qtd)
1156                         enqueue_an_ATL_packet(usb_hcd, qh, qtd);
1157
1158                 skip_map = isp1760_readl(usb_hcd->regs +
1159                                 HC_ATL_PTD_SKIPMAP_REG);
1160         }
1161 }
1162
1163 static void do_intl_int(struct usb_hcd *usb_hcd)
1164 {
1165         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
1166         u32 done_map, skip_map;
1167         struct ptd ptd;
1168         struct urb *urb = NULL;
1169         u32 int_regs;
1170         u32 int_regs_base;
1171         u32 payload;
1172         u32 length;
1173         u32 or_map;
1174         int error;
1175         u32 queue_entry;
1176         struct isp1760_qtd *qtd;
1177         struct isp1760_qh *qh;
1178
1179         done_map = isp1760_readl(usb_hcd->regs +
1180                         HC_INT_PTD_DONEMAP_REG);
1181         skip_map = isp1760_readl(usb_hcd->regs +
1182                         HC_INT_PTD_SKIPMAP_REG);
1183
1184         or_map = isp1760_readl(usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
1185         or_map &= ~done_map;
1186         isp1760_writel(or_map, usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
1187
1188         int_regs_base = INT_REGS_OFFSET;
1189
1190         while (done_map) {
1191                 u32 dw1;
1192                 u32 dw3;
1193
1194                 queue_entry = __ffs(done_map);
1195                 done_map &= ~(1 << queue_entry);
1196                 skip_map |= 1 << queue_entry;
1197
1198                 int_regs = int_regs_base + queue_entry * sizeof(struct ptd);
1199                 urb = priv->int_ints[queue_entry].urb;
1200                 qtd = priv->int_ints[queue_entry].qtd;
1201                 qh = priv->int_ints[queue_entry].qh;
1202                 payload = priv->int_ints[queue_entry].payload;
1203
1204                 if (!qh) {
1205                         printk(KERN_ERR "(INT) qh is 0\n");
1206                         continue;
1207                 }
1208
1209                 priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + int_regs,
1210                                 int_regs, sizeof(ptd));
1211                 dw1 = le32_to_cpu(ptd.dw1);
1212                 dw3 = le32_to_cpu(ptd.dw3);
1213                 check_int_err_status(le32_to_cpu(ptd.dw4));
1214
1215                 error = check_error(&ptd);
1216                 if (error) {
1217 #if 0
1218                         printk(KERN_ERR "Error in %s().\n", __func__);
1219                         printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1220                                         "dw3: %08x dw4: %08x dw5: %08x dw6: "
1221                                         "%08x dw7: %08x\n",
1222                                         ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1223                                         ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1224 #endif
1225                         urb->status = -EPIPE;
1226                         priv->int_ints[queue_entry].qh->toggle = 0;
1227                         priv->int_ints[queue_entry].qh->ping = 0;
1228
1229                 } else {
1230                         priv->int_ints[queue_entry].qh->toggle =
1231                                 dw3 & (1 << 25);
1232                         priv->int_ints[queue_entry].qh->ping = dw3 & (1 << 26);
1233                 }
1234
1235                 if (urb->dev->speed != USB_SPEED_HIGH)
1236                         length = PTD_XFERRED_LENGTH_LO(dw3);
1237                 else
1238                         length = PTD_XFERRED_LENGTH(dw3);
1239
1240                 if (length) {
1241                         switch (DW1_GET_PID(dw1)) {
1242                         case IN_PID:
1243                                 priv_read_copy(priv,
1244                                         priv->int_ints[queue_entry].data_buffer,
1245                                         usb_hcd->regs + payload , payload,
1246                                         length);
1247                         case OUT_PID:
1248
1249                                 urb->actual_length += length;
1250
1251                         case SETUP_PID:
1252                                 break;
1253                         }
1254                 }
1255
1256                 priv->int_ints[queue_entry].data_buffer = NULL;
1257                 priv->int_ints[queue_entry].urb = NULL;
1258                 priv->int_ints[queue_entry].qtd = NULL;
1259                 priv->int_ints[queue_entry].qh = NULL;
1260
1261                 isp1760_writel(skip_map, usb_hcd->regs +
1262                                 HC_INT_PTD_SKIPMAP_REG);
1263                 free_mem(priv, payload);
1264
1265                 if (urb->status == -EPIPE) {
1266                         /* HALT received */
1267
1268                          qtd = clean_up_qtdlist(qtd);
1269                          isp1760_urb_done(priv, urb, urb->status);
1270
1271                 } else if (qtd->status & URB_COMPLETE_NOTIFY) {
1272
1273                         if (urb->status == -EINPROGRESS)
1274                                 urb->status = 0;
1275
1276                         qtd = clean_this_qtd(qtd);
1277                         isp1760_urb_done(priv, urb, urb->status);
1278
1279                 } else {
1280                         /* next QTD of this URB */
1281
1282                         qtd = clean_this_qtd(qtd);
1283                         BUG_ON(!qtd);
1284                 }
1285
1286                 if (qtd)
1287                         enqueue_an_INT_packet(usb_hcd, qh, qtd);
1288
1289                 skip_map = isp1760_readl(usb_hcd->regs +
1290                                 HC_INT_PTD_SKIPMAP_REG);
1291         }
1292 }
1293
1294 #define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
1295 static struct isp1760_qh *qh_make(struct isp1760_hcd *priv, struct urb *urb,
1296                 gfp_t flags)
1297 {
1298         struct isp1760_qh *qh;
1299         int is_input, type;
1300
1301         qh = isp1760_qh_alloc(priv, flags);
1302         if (!qh)
1303                 return qh;
1304
1305         /*
1306          * init endpoint/device data for this QH
1307          */
1308         is_input = usb_pipein(urb->pipe);
1309         type = usb_pipetype(urb->pipe);
1310
1311         if (type == PIPE_INTERRUPT) {
1312
1313                 if (urb->dev->speed == USB_SPEED_HIGH) {
1314
1315                         qh->period = urb->interval >> 3;
1316                         if (qh->period == 0 && urb->interval != 1) {
1317                                 /* NOTE interval 2 or 4 uframes could work.
1318                                  * But interval 1 scheduling is simpler, and
1319                                  * includes high bandwidth.
1320                                  */
1321                                 printk(KERN_ERR "intr period %d uframes, NYET!",
1322                                                 urb->interval);
1323                                 qh_destroy(qh);
1324                                 return NULL;
1325                         }
1326                 } else {
1327                         qh->period = urb->interval;
1328                 }
1329         }
1330
1331         /* support for tt scheduling, and access to toggles */
1332         qh->dev = urb->dev;
1333
1334         if (!usb_pipecontrol(urb->pipe))
1335                 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input,
1336                                 1);
1337         return qh;
1338 }
1339
1340 /*
1341  * For control/bulk/interrupt, return QH with these TDs appended.
1342  * Allocates and initializes the QH if necessary.
1343  * Returns null if it can't allocate a QH it needs to.
1344  * If the QH has TDs (urbs) already, that's great.
1345  */
1346 static struct isp1760_qh *qh_append_tds(struct isp1760_hcd *priv,
1347                 struct urb *urb, struct list_head *qtd_list, int epnum,
1348                 void **ptr)
1349 {
1350         struct isp1760_qh *qh;
1351         struct isp1760_qtd *qtd;
1352         struct isp1760_qtd *prev_qtd;
1353
1354         qh = (struct isp1760_qh *)*ptr;
1355         if (!qh) {
1356                 /* can't sleep here, we have priv->lock... */
1357                 qh = qh_make(priv, urb, GFP_ATOMIC);
1358                 if (!qh)
1359                         return qh;
1360                 *ptr = qh;
1361         }
1362
1363         qtd = list_entry(qtd_list->next, struct isp1760_qtd,
1364                         qtd_list);
1365         if (!list_empty(&qh->qtd_list))
1366                 prev_qtd = list_entry(qh->qtd_list.prev,
1367                                 struct isp1760_qtd, qtd_list);
1368         else
1369                 prev_qtd = NULL;
1370
1371         list_splice(qtd_list, qh->qtd_list.prev);
1372         if (prev_qtd) {
1373                 BUG_ON(prev_qtd->hw_next);
1374                 prev_qtd->hw_next = qtd;
1375         }
1376
1377         urb->hcpriv = qh;
1378         return qh;
1379 }
1380
1381 static void qtd_list_free(struct isp1760_hcd *priv, struct urb *urb,
1382                 struct list_head *qtd_list)
1383 {
1384         struct list_head *entry, *temp;
1385
1386         list_for_each_safe(entry, temp, qtd_list) {
1387                 struct isp1760_qtd      *qtd;
1388
1389                 qtd = list_entry(entry, struct isp1760_qtd, qtd_list);
1390                 list_del(&qtd->qtd_list);
1391                 isp1760_qtd_free(qtd);
1392         }
1393 }
1394
1395 static int isp1760_prepare_enqueue(struct isp1760_hcd *priv, struct urb *urb,
1396                 struct list_head *qtd_list, gfp_t mem_flags, packet_enqueue *p)
1397 {
1398         struct isp1760_qtd         *qtd;
1399         int                     epnum;
1400         unsigned long           flags;
1401         struct isp1760_qh          *qh = NULL;
1402         int                     rc;
1403         int qh_busy;
1404
1405         qtd = list_entry(qtd_list->next, struct isp1760_qtd, qtd_list);
1406         epnum = urb->ep->desc.bEndpointAddress;
1407
1408         spin_lock_irqsave(&priv->lock, flags);
1409         if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &priv_to_hcd(priv)->flags)) {
1410                 rc = -ESHUTDOWN;
1411                 goto done;
1412         }
1413         rc = usb_hcd_link_urb_to_ep(priv_to_hcd(priv), urb);
1414         if (rc)
1415                 goto done;
1416
1417         qh = urb->ep->hcpriv;
1418         if (qh)
1419                 qh_busy = !list_empty(&qh->qtd_list);
1420         else
1421                 qh_busy = 0;
1422
1423         qh = qh_append_tds(priv, urb, qtd_list, epnum, &urb->ep->hcpriv);
1424         if (!qh) {
1425                 usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
1426                 rc = -ENOMEM;
1427                 goto done;
1428         }
1429
1430         if (!qh_busy)
1431                 p(priv_to_hcd(priv), qh, qtd);
1432
1433 done:
1434         spin_unlock_irqrestore(&priv->lock, flags);
1435         if (!qh)
1436                 qtd_list_free(priv, urb, qtd_list);
1437         return rc;
1438 }
1439
1440 static struct isp1760_qtd *isp1760_qtd_alloc(struct isp1760_hcd *priv,
1441                 gfp_t flags)
1442 {
1443         struct isp1760_qtd *qtd;
1444
1445         qtd = kmem_cache_zalloc(qtd_cachep, flags);
1446         if (qtd)
1447                 INIT_LIST_HEAD(&qtd->qtd_list);
1448
1449         return qtd;
1450 }
1451
1452 /*
1453  * create a list of filled qtds for this URB; won't link into qh.
1454  */
1455 static struct list_head *qh_urb_transaction(struct isp1760_hcd *priv,
1456                 struct urb *urb, struct list_head *head, gfp_t flags)
1457 {
1458         struct isp1760_qtd *qtd, *qtd_prev;
1459         void *buf;
1460         int len, maxpacket;
1461         int is_input;
1462         u32 token;
1463
1464         /*
1465          * URBs map to sequences of QTDs:  one logical transaction
1466          */
1467         qtd = isp1760_qtd_alloc(priv, flags);
1468         if (!qtd)
1469                 return NULL;
1470
1471         list_add_tail(&qtd->qtd_list, head);
1472         qtd->urb = urb;
1473         urb->status = -EINPROGRESS;
1474
1475         token = 0;
1476         /* for split transactions, SplitXState initialized to zero */
1477
1478         len = urb->transfer_buffer_length;
1479         is_input = usb_pipein(urb->pipe);
1480         if (usb_pipecontrol(urb->pipe)) {
1481                 /* SETUP pid */
1482                 qtd_fill(qtd, urb->setup_packet,
1483                                 sizeof(struct usb_ctrlrequest),
1484                                 token | SETUP_PID);
1485
1486                 /* ... and always at least one more pid */
1487                 token ^= DATA_TOGGLE;
1488                 qtd_prev = qtd;
1489                 qtd = isp1760_qtd_alloc(priv, flags);
1490                 if (!qtd)
1491                         goto cleanup;
1492                 qtd->urb = urb;
1493                 qtd_prev->hw_next = qtd;
1494                 list_add_tail(&qtd->qtd_list, head);
1495
1496                 /* for zero length DATA stages, STATUS is always IN */
1497                 if (len == 0)
1498                         token |= IN_PID;
1499         }
1500
1501         /*
1502          * data transfer stage:  buffer setup
1503          */
1504         buf = urb->transfer_buffer;
1505
1506         if (is_input)
1507                 token |= IN_PID;
1508         else
1509                 token |= OUT_PID;
1510
1511         maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input));
1512
1513         /*
1514          * buffer gets wrapped in one or more qtds;
1515          * last one may be "short" (including zero len)
1516          * and may serve as a control status ack
1517          */
1518         for (;;) {
1519                 int this_qtd_len;
1520
1521                 if (!buf && len) {
1522                         /* XXX This looks like usb storage / SCSI bug */
1523                         printk(KERN_ERR "buf is null, dma is %08lx len is %d\n",
1524                                         (long unsigned)urb->transfer_dma, len);
1525                         WARN_ON(1);
1526                 }
1527
1528                 this_qtd_len = qtd_fill(qtd, buf, len, token);
1529                 len -= this_qtd_len;
1530                 buf += this_qtd_len;
1531
1532                 /* qh makes control packets use qtd toggle; maybe switch it */
1533                 if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0)
1534                         token ^= DATA_TOGGLE;
1535
1536                 if (len <= 0)
1537                         break;
1538
1539                 qtd_prev = qtd;
1540                 qtd = isp1760_qtd_alloc(priv, flags);
1541                 if (!qtd)
1542                         goto cleanup;
1543                 qtd->urb = urb;
1544                 qtd_prev->hw_next = qtd;
1545                 list_add_tail(&qtd->qtd_list, head);
1546         }
1547
1548         /*
1549          * control requests may need a terminating data "status" ack;
1550          * bulk ones may need a terminating short packet (zero length).
1551          */
1552         if (urb->transfer_buffer_length != 0) {
1553                 int one_more = 0;
1554
1555                 if (usb_pipecontrol(urb->pipe)) {
1556                         one_more = 1;
1557                         /* "in" <--> "out"  */
1558                         token ^= IN_PID;
1559                         /* force DATA1 */
1560                         token |= DATA_TOGGLE;
1561                 } else if (usb_pipebulk(urb->pipe)
1562                                 && (urb->transfer_flags & URB_ZERO_PACKET)
1563                                 && !(urb->transfer_buffer_length % maxpacket)) {
1564                         one_more = 1;
1565                 }
1566                 if (one_more) {
1567                         qtd_prev = qtd;
1568                         qtd = isp1760_qtd_alloc(priv, flags);
1569                         if (!qtd)
1570                                 goto cleanup;
1571                         qtd->urb = urb;
1572                         qtd_prev->hw_next = qtd;
1573                         list_add_tail(&qtd->qtd_list, head);
1574
1575                         /* never any data in such packets */
1576                         qtd_fill(qtd, NULL, 0, token);
1577                 }
1578         }
1579
1580         qtd->status = URB_COMPLETE_NOTIFY;
1581         return head;
1582
1583 cleanup:
1584         qtd_list_free(priv, urb, head);
1585         return NULL;
1586 }
1587
1588 static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
1589                 gfp_t mem_flags)
1590 {
1591         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1592         struct list_head qtd_list;
1593         packet_enqueue *pe;
1594
1595         INIT_LIST_HEAD(&qtd_list);
1596
1597         switch (usb_pipetype(urb->pipe)) {
1598         case PIPE_CONTROL:
1599         case PIPE_BULK:
1600
1601                 if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
1602                         return -ENOMEM;
1603                 pe =  enqueue_an_ATL_packet;
1604                 break;
1605
1606         case PIPE_INTERRUPT:
1607                 if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
1608                         return -ENOMEM;
1609                 pe = enqueue_an_INT_packet;
1610                 break;
1611
1612         case PIPE_ISOCHRONOUS:
1613                 printk(KERN_ERR "PIPE_ISOCHRONOUS ain't supported\n");
1614         default:
1615                 return -EPIPE;
1616         }
1617
1618         isp1760_prepare_enqueue(priv, urb, &qtd_list, mem_flags, pe);
1619         return 0;
1620 }
1621
1622 static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
1623                 int status)
1624 {
1625         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1626         struct inter_packet_info *ints;
1627         u32 i;
1628         u32 reg_base, or_reg, skip_reg;
1629         unsigned long flags;
1630         struct ptd ptd;
1631
1632         switch (usb_pipetype(urb->pipe)) {
1633         case PIPE_ISOCHRONOUS:
1634                 return -EPIPE;
1635                 break;
1636
1637         case PIPE_INTERRUPT:
1638                 ints = priv->int_ints;
1639                 reg_base = INT_REGS_OFFSET;
1640                 or_reg = HC_INT_IRQ_MASK_OR_REG;
1641                 skip_reg = HC_INT_PTD_SKIPMAP_REG;
1642                 break;
1643
1644         default:
1645                 ints = priv->atl_ints;
1646                 reg_base = ATL_REGS_OFFSET;
1647                 or_reg = HC_ATL_IRQ_MASK_OR_REG;
1648                 skip_reg = HC_ATL_PTD_SKIPMAP_REG;
1649                 break;
1650         }
1651
1652         memset(&ptd, 0, sizeof(ptd));
1653         spin_lock_irqsave(&priv->lock, flags);
1654
1655         for (i = 0; i < 32; i++) {
1656                 if (ints->urb == urb) {
1657                         u32 skip_map;
1658                         u32 or_map;
1659                         struct isp1760_qtd *qtd;
1660
1661                         skip_map = isp1760_readl(hcd->regs + skip_reg);
1662                         skip_map |= 1 << i;
1663                         isp1760_writel(skip_map, hcd->regs + skip_reg);
1664
1665                         or_map = isp1760_readl(hcd->regs + or_reg);
1666                         or_map &= ~(1 << i);
1667                         isp1760_writel(or_map, hcd->regs + or_reg);
1668
1669                         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + reg_base
1670                                         + i * sizeof(ptd), sizeof(ptd));
1671                         qtd = ints->qtd;
1672
1673                         clean_up_qtdlist(qtd);
1674
1675                         free_mem(priv, ints->payload);
1676
1677                         ints->urb = NULL;
1678                         ints->qh = NULL;
1679                         ints->qtd = NULL;
1680                         ints->data_buffer = NULL;
1681                         ints->payload = 0;
1682
1683                         isp1760_urb_done(priv, urb, status);
1684                         break;
1685                 }
1686                 ints++;
1687         }
1688
1689         spin_unlock_irqrestore(&priv->lock, flags);
1690         return 0;
1691 }
1692
1693 static irqreturn_t isp1760_irq(struct usb_hcd *usb_hcd)
1694 {
1695         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
1696         u32 imask;
1697         irqreturn_t irqret = IRQ_NONE;
1698
1699         spin_lock(&priv->lock);
1700
1701         if (!(usb_hcd->state & HC_STATE_RUNNING))
1702                 goto leave;
1703
1704         imask = isp1760_readl(usb_hcd->regs + HC_INTERRUPT_REG);
1705         if (unlikely(!imask))
1706                 goto leave;
1707
1708         isp1760_writel(imask, usb_hcd->regs + HC_INTERRUPT_REG);
1709         if (imask & HC_ATL_INT)
1710                 do_atl_int(usb_hcd);
1711
1712         if (imask & HC_INTL_INT)
1713                 do_intl_int(usb_hcd);
1714
1715         irqret = IRQ_HANDLED;
1716 leave:
1717         spin_unlock(&priv->lock);
1718         return irqret;
1719 }
1720
1721 static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf)
1722 {
1723         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1724         u32 temp, status = 0;
1725         u32 mask;
1726         int retval = 1;
1727         unsigned long flags;
1728
1729         /* if !USB_SUSPEND, root hub timers won't get shut down ... */
1730         if (!HC_IS_RUNNING(hcd->state))
1731                 return 0;
1732
1733         /* init status to no-changes */
1734         buf[0] = 0;
1735         mask = PORT_CSC;
1736
1737         spin_lock_irqsave(&priv->lock, flags);
1738         temp = isp1760_readl(hcd->regs + HC_PORTSC1);
1739
1740         if (temp & PORT_OWNER) {
1741                 if (temp & PORT_CSC) {
1742                         temp &= ~PORT_CSC;
1743                         isp1760_writel(temp, hcd->regs + HC_PORTSC1);
1744                         goto done;
1745                 }
1746         }
1747
1748         /*
1749          * Return status information even for ports with OWNER set.
1750          * Otherwise khubd wouldn't see the disconnect event when a
1751          * high-speed device is switched over to the companion
1752          * controller by the user.
1753          */
1754
1755         if ((temp & mask) != 0
1756                         || ((temp & PORT_RESUME) != 0
1757                                 && time_after_eq(jiffies,
1758                                         priv->reset_done))) {
1759                 buf [0] |= 1 << (0 + 1);
1760                 status = STS_PCD;
1761         }
1762         /* FIXME autosuspend idle root hubs */
1763 done:
1764         spin_unlock_irqrestore(&priv->lock, flags);
1765         return status ? retval : 0;
1766 }
1767
1768 static void isp1760_hub_descriptor(struct isp1760_hcd *priv,
1769                 struct usb_hub_descriptor *desc)
1770 {
1771         int ports = HCS_N_PORTS(priv->hcs_params);
1772         u16 temp;
1773
1774         desc->bDescriptorType = 0x29;
1775         /* priv 1.0, 2.3.9 says 20ms max */
1776         desc->bPwrOn2PwrGood = 10;
1777         desc->bHubContrCurrent = 0;
1778
1779         desc->bNbrPorts = ports;
1780         temp = 1 + (ports / 8);
1781         desc->bDescLength = 7 + 2 * temp;
1782
1783         /* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
1784         memset(&desc->bitmap[0], 0, temp);
1785         memset(&desc->bitmap[temp], 0xff, temp);
1786
1787         /* per-port overcurrent reporting */
1788         temp = 0x0008;
1789         if (HCS_PPC(priv->hcs_params))
1790                 /* per-port power control */
1791                 temp |= 0x0001;
1792         else
1793                 /* no power switching */
1794                 temp |= 0x0002;
1795         desc->wHubCharacteristics = cpu_to_le16(temp);
1796 }
1797
1798 #define PORT_WAKE_BITS  (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
1799
1800 static int check_reset_complete(struct isp1760_hcd *priv, int index,
1801                 u32 __iomem *status_reg, int port_status)
1802 {
1803         if (!(port_status & PORT_CONNECT))
1804                 return port_status;
1805
1806         /* if reset finished and it's still not enabled -- handoff */
1807         if (!(port_status & PORT_PE)) {
1808
1809                 printk(KERN_ERR "port %d full speed --> companion\n",
1810                         index + 1);
1811
1812                 port_status |= PORT_OWNER;
1813                 port_status &= ~PORT_RWC_BITS;
1814                 isp1760_writel(port_status, status_reg);
1815
1816         } else
1817                 printk(KERN_ERR "port %d high speed\n", index + 1);
1818
1819         return port_status;
1820 }
1821
1822 static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq,
1823                 u16 wValue, u16 wIndex, char *buf, u16 wLength)
1824 {
1825         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1826         int ports = HCS_N_PORTS(priv->hcs_params);
1827         u32 __iomem *status_reg = hcd->regs + HC_PORTSC1;
1828         u32 temp, status;
1829         unsigned long flags;
1830         int retval = 0;
1831         unsigned selector;
1832
1833         /*
1834          * FIXME:  support SetPortFeatures USB_PORT_FEAT_INDICATOR.
1835          * HCS_INDICATOR may say we can change LEDs to off/amber/green.
1836          * (track current state ourselves) ... blink for diagnostics,
1837          * power, "this is the one", etc.  EHCI spec supports this.
1838          */
1839
1840         spin_lock_irqsave(&priv->lock, flags);
1841         switch (typeReq) {
1842         case ClearHubFeature:
1843                 switch (wValue) {
1844                 case C_HUB_LOCAL_POWER:
1845                 case C_HUB_OVER_CURRENT:
1846                         /* no hub-wide feature/status flags */
1847                         break;
1848                 default:
1849                         goto error;
1850                 }
1851                 break;
1852         case ClearPortFeature:
1853                 if (!wIndex || wIndex > ports)
1854                         goto error;
1855                 wIndex--;
1856                 temp = isp1760_readl(status_reg);
1857
1858                 /*
1859                  * Even if OWNER is set, so the port is owned by the
1860                  * companion controller, khubd needs to be able to clear
1861                  * the port-change status bits (especially
1862                  * USB_PORT_FEAT_C_CONNECTION).
1863                  */
1864
1865                 switch (wValue) {
1866                 case USB_PORT_FEAT_ENABLE:
1867                         isp1760_writel(temp & ~PORT_PE, status_reg);
1868                         break;
1869                 case USB_PORT_FEAT_C_ENABLE:
1870                         /* XXX error? */
1871                         break;
1872                 case USB_PORT_FEAT_SUSPEND:
1873                         if (temp & PORT_RESET)
1874                                 goto error;
1875
1876                         if (temp & PORT_SUSPEND) {
1877                                 if ((temp & PORT_PE) == 0)
1878                                         goto error;
1879                                 /* resume signaling for 20 msec */
1880                                 temp &= ~(PORT_RWC_BITS);
1881                                 isp1760_writel(temp | PORT_RESUME,
1882                                                 status_reg);
1883                                 priv->reset_done = jiffies +
1884                                         msecs_to_jiffies(20);
1885                         }
1886                         break;
1887                 case USB_PORT_FEAT_C_SUSPEND:
1888                         /* we auto-clear this feature */
1889                         break;
1890                 case USB_PORT_FEAT_POWER:
1891                         if (HCS_PPC(priv->hcs_params))
1892                                 isp1760_writel(temp & ~PORT_POWER, status_reg);
1893                         break;
1894                 case USB_PORT_FEAT_C_CONNECTION:
1895                         isp1760_writel(temp | PORT_CSC,
1896                                         status_reg);
1897                         break;
1898                 case USB_PORT_FEAT_C_OVER_CURRENT:
1899                         /* XXX error ?*/
1900                         break;
1901                 case USB_PORT_FEAT_C_RESET:
1902                         /* GetPortStatus clears reset */
1903                         break;
1904                 default:
1905                         goto error;
1906                 }
1907                 isp1760_readl(hcd->regs + HC_USBCMD);
1908                 break;
1909         case GetHubDescriptor:
1910                 isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *)
1911                         buf);
1912                 break;
1913         case GetHubStatus:
1914                 /* no hub-wide feature/status flags */
1915                 memset(buf, 0, 4);
1916                 break;
1917         case GetPortStatus:
1918                 if (!wIndex || wIndex > ports)
1919                         goto error;
1920                 wIndex--;
1921                 status = 0;
1922                 temp = isp1760_readl(status_reg);
1923
1924                 /* wPortChange bits */
1925                 if (temp & PORT_CSC)
1926                         status |= 1 << USB_PORT_FEAT_C_CONNECTION;
1927
1928
1929                 /* whoever resumes must GetPortStatus to complete it!! */
1930                 if (temp & PORT_RESUME) {
1931                         printk(KERN_ERR "Port resume should be skipped.\n");
1932
1933                         /* Remote Wakeup received? */
1934                         if (!priv->reset_done) {
1935                                 /* resume signaling for 20 msec */
1936                                 priv->reset_done = jiffies
1937                                                 + msecs_to_jiffies(20);
1938                                 /* check the port again */
1939                                 mod_timer(&priv_to_hcd(priv)->rh_timer,
1940                                                 priv->reset_done);
1941                         }
1942
1943                         /* resume completed? */
1944                         else if (time_after_eq(jiffies,
1945                                         priv->reset_done)) {
1946                                 status |= 1 << USB_PORT_FEAT_C_SUSPEND;
1947                                 priv->reset_done = 0;
1948
1949                                 /* stop resume signaling */
1950                                 temp = isp1760_readl(status_reg);
1951                                 isp1760_writel(
1952                                         temp & ~(PORT_RWC_BITS | PORT_RESUME),
1953                                         status_reg);
1954                                 retval = handshake(priv, status_reg,
1955                                            PORT_RESUME, 0, 2000 /* 2msec */);
1956                                 if (retval != 0) {
1957                                         isp1760_err(priv,
1958                                                 "port %d resume error %d\n",
1959                                                 wIndex + 1, retval);
1960                                         goto error;
1961                                 }
1962                                 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
1963                         }
1964                 }
1965
1966                 /* whoever resets must GetPortStatus to complete it!! */
1967                 if ((temp & PORT_RESET)
1968                                 && time_after_eq(jiffies,
1969                                         priv->reset_done)) {
1970                         status |= 1 << USB_PORT_FEAT_C_RESET;
1971                         priv->reset_done = 0;
1972
1973                         /* force reset to complete */
1974                         isp1760_writel(temp & ~PORT_RESET,
1975                                         status_reg);
1976                         /* REVISIT:  some hardware needs 550+ usec to clear
1977                          * this bit; seems too long to spin routinely...
1978                          */
1979                         retval = handshake(priv, status_reg,
1980                                         PORT_RESET, 0, 750);
1981                         if (retval != 0) {
1982                                 isp1760_err(priv, "port %d reset error %d\n",
1983                                                 wIndex + 1, retval);
1984                                 goto error;
1985                         }
1986
1987                         /* see what we found out */
1988                         temp = check_reset_complete(priv, wIndex, status_reg,
1989                                         isp1760_readl(status_reg));
1990                 }
1991                 /*
1992                  * Even if OWNER is set, there's no harm letting khubd
1993                  * see the wPortStatus values (they should all be 0 except
1994                  * for PORT_POWER anyway).
1995                  */
1996
1997                 if (temp & PORT_OWNER)
1998                         printk(KERN_ERR "Warning: PORT_OWNER is set\n");
1999
2000                 if (temp & PORT_CONNECT) {
2001                         status |= 1 << USB_PORT_FEAT_CONNECTION;
2002                         /* status may be from integrated TT */
2003                         status |= ehci_port_speed(priv, temp);
2004                 }
2005                 if (temp & PORT_PE)
2006                         status |= 1 << USB_PORT_FEAT_ENABLE;
2007                 if (temp & (PORT_SUSPEND|PORT_RESUME))
2008                         status |= 1 << USB_PORT_FEAT_SUSPEND;
2009                 if (temp & PORT_RESET)
2010                         status |= 1 << USB_PORT_FEAT_RESET;
2011                 if (temp & PORT_POWER)
2012                         status |= 1 << USB_PORT_FEAT_POWER;
2013
2014                 put_unaligned(cpu_to_le32(status), (__le32 *) buf);
2015                 break;
2016         case SetHubFeature:
2017                 switch (wValue) {
2018                 case C_HUB_LOCAL_POWER:
2019                 case C_HUB_OVER_CURRENT:
2020                         /* no hub-wide feature/status flags */
2021                         break;
2022                 default:
2023                         goto error;
2024                 }
2025                 break;
2026         case SetPortFeature:
2027                 selector = wIndex >> 8;
2028                 wIndex &= 0xff;
2029                 if (!wIndex || wIndex > ports)
2030                         goto error;
2031                 wIndex--;
2032                 temp = isp1760_readl(status_reg);
2033                 if (temp & PORT_OWNER)
2034                         break;
2035
2036 /*              temp &= ~PORT_RWC_BITS; */
2037                 switch (wValue) {
2038                 case USB_PORT_FEAT_ENABLE:
2039                         isp1760_writel(temp | PORT_PE, status_reg);
2040                         break;
2041
2042                 case USB_PORT_FEAT_SUSPEND:
2043                         if ((temp & PORT_PE) == 0
2044                                         || (temp & PORT_RESET) != 0)
2045                                 goto error;
2046
2047                         isp1760_writel(temp | PORT_SUSPEND, status_reg);
2048                         break;
2049                 case USB_PORT_FEAT_POWER:
2050                         if (HCS_PPC(priv->hcs_params))
2051                                 isp1760_writel(temp | PORT_POWER,
2052                                                 status_reg);
2053                         break;
2054                 case USB_PORT_FEAT_RESET:
2055                         if (temp & PORT_RESUME)
2056                                 goto error;
2057                         /* line status bits may report this as low speed,
2058                          * which can be fine if this root hub has a
2059                          * transaction translator built in.
2060                          */
2061                         if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
2062                                         && PORT_USB11(temp)) {
2063                                 temp |= PORT_OWNER;
2064                         } else {
2065                                 temp |= PORT_RESET;
2066                                 temp &= ~PORT_PE;
2067
2068                                 /*
2069                                  * caller must wait, then call GetPortStatus
2070                                  * usb 2.0 spec says 50 ms resets on root
2071                                  */
2072                                 priv->reset_done = jiffies +
2073                                         msecs_to_jiffies(50);
2074                         }
2075                         isp1760_writel(temp, status_reg);
2076                         break;
2077                 default:
2078                         goto error;
2079                 }
2080                 isp1760_readl(hcd->regs + HC_USBCMD);
2081                 break;
2082
2083         default:
2084 error:
2085                 /* "stall" on error */
2086                 retval = -EPIPE;
2087         }
2088         spin_unlock_irqrestore(&priv->lock, flags);
2089         return retval;
2090 }
2091
2092 static void isp1760_endpoint_disable(struct usb_hcd *usb_hcd,
2093                 struct usb_host_endpoint *ep)
2094 {
2095         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
2096         struct isp1760_qh *qh;
2097         struct isp1760_qtd *qtd;
2098         unsigned long flags;
2099
2100         spin_lock_irqsave(&priv->lock, flags);
2101         qh = ep->hcpriv;
2102         if (!qh)
2103                 goto out;
2104
2105         ep->hcpriv = NULL;
2106         do {
2107                 /* more than entry might get removed */
2108                 if (list_empty(&qh->qtd_list))
2109                         break;
2110
2111                 qtd = list_first_entry(&qh->qtd_list, struct isp1760_qtd,
2112                                 qtd_list);
2113
2114                 if (qtd->status & URB_ENQUEUED) {
2115
2116                         spin_unlock_irqrestore(&priv->lock, flags);
2117                         isp1760_urb_dequeue(usb_hcd, qtd->urb, -ECONNRESET);
2118                         spin_lock_irqsave(&priv->lock, flags);
2119                 } else {
2120                         struct urb *urb;
2121
2122                         urb = qtd->urb;
2123                         clean_up_qtdlist(qtd);
2124                         isp1760_urb_done(priv, urb, -ECONNRESET);
2125                 }
2126         } while (1);
2127
2128         qh_destroy(qh);
2129         /* remove requests and leak them.
2130          * ATL are pretty fast done, INT could take a while...
2131          * The latter shoule be removed
2132          */
2133 out:
2134         spin_unlock_irqrestore(&priv->lock, flags);
2135 }
2136
2137 static int isp1760_get_frame(struct usb_hcd *hcd)
2138 {
2139         struct isp1760_hcd *priv = hcd_to_priv(hcd);
2140         u32 fr;
2141
2142         fr = isp1760_readl(hcd->regs + HC_FRINDEX);
2143         return (fr >> 3) % priv->periodic_size;
2144 }
2145
2146 static void isp1760_stop(struct usb_hcd *hcd)
2147 {
2148         struct isp1760_hcd *priv = hcd_to_priv(hcd);
2149         u32 temp;
2150
2151         isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1,
2152                         NULL, 0);
2153         mdelay(20);
2154
2155         spin_lock_irq(&priv->lock);
2156         ehci_reset(priv);
2157         /* Disable IRQ */
2158         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
2159         isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
2160         spin_unlock_irq(&priv->lock);
2161
2162         isp1760_writel(0, hcd->regs + HC_CONFIGFLAG);
2163 }
2164
2165 static void isp1760_shutdown(struct usb_hcd *hcd)
2166 {
2167         u32 command, temp;
2168
2169         isp1760_stop(hcd);
2170         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
2171         isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
2172
2173         command = isp1760_readl(hcd->regs + HC_USBCMD);
2174         command &= ~CMD_RUN;
2175         isp1760_writel(command, hcd->regs + HC_USBCMD);
2176 }
2177
2178 static const struct hc_driver isp1760_hc_driver = {
2179         .description            = "isp1760-hcd",
2180         .product_desc           = "NXP ISP1760 USB Host Controller",
2181         .hcd_priv_size          = sizeof(struct isp1760_hcd),
2182         .irq                    = isp1760_irq,
2183         .flags                  = HCD_MEMORY | HCD_USB2,
2184         .reset                  = isp1760_hc_setup,
2185         .start                  = isp1760_run,
2186         .stop                   = isp1760_stop,
2187         .shutdown               = isp1760_shutdown,
2188         .urb_enqueue            = isp1760_urb_enqueue,
2189         .urb_dequeue            = isp1760_urb_dequeue,
2190         .endpoint_disable       = isp1760_endpoint_disable,
2191         .get_frame_number       = isp1760_get_frame,
2192         .hub_status_data        = isp1760_hub_status_data,
2193         .hub_control            = isp1760_hub_control,
2194 };
2195
2196 int __init init_kmem_once(void)
2197 {
2198         qtd_cachep = kmem_cache_create("isp1760_qtd",
2199                         sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY |
2200                         SLAB_MEM_SPREAD, NULL);
2201
2202         if (!qtd_cachep)
2203                 return -ENOMEM;
2204
2205         qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh),
2206                         0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL);
2207
2208         if (!qh_cachep) {
2209                 kmem_cache_destroy(qtd_cachep);
2210                 return -ENOMEM;
2211         }
2212
2213         return 0;
2214 }
2215
2216 void deinit_kmem_cache(void)
2217 {
2218         kmem_cache_destroy(qtd_cachep);
2219         kmem_cache_destroy(qh_cachep);
2220 }
2221
2222 struct usb_hcd *isp1760_register(u64 res_start, u64 res_len, int irq,
2223                 u64 irqflags, struct device *dev, const char *busname,
2224                 unsigned int devflags)
2225 {
2226         struct usb_hcd *hcd;
2227         struct isp1760_hcd *priv;
2228         int ret;
2229
2230         if (usb_disabled())
2231                 return ERR_PTR(-ENODEV);
2232
2233         /* prevent usb-core allocating DMA pages */
2234         dev->dma_mask = NULL;
2235
2236         hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev));
2237         if (!hcd)
2238                 return ERR_PTR(-ENOMEM);
2239
2240         priv = hcd_to_priv(hcd);
2241         priv->devflags = devflags;
2242         init_memory(priv);
2243         hcd->regs = ioremap(res_start, res_len);
2244         if (!hcd->regs) {
2245                 ret = -EIO;
2246                 goto err_put;
2247         }
2248
2249         hcd->irq = irq;
2250         hcd->rsrc_start = res_start;
2251         hcd->rsrc_len = res_len;
2252
2253         ret = usb_add_hcd(hcd, irq, irqflags);
2254         if (ret)
2255                 goto err_unmap;
2256
2257         return hcd;
2258
2259 err_unmap:
2260          iounmap(hcd->regs);
2261
2262 err_put:
2263          usb_put_hcd(hcd);
2264
2265          return ERR_PTR(ret);
2266 }
2267
2268 MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
2269 MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
2270 MODULE_LICENSE("GPL v2");