vcs.maemo.org Git - kernel-power/blob - usbhost/drivers/usb2/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 len)
 130 {
 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
 139         while (len >= 4) {
 140                 *src = __raw_readl(dst);
 141                 len -= 4;
 142                 src++;
 143                 dst++;
 144         }
 145
 146         if (!len)
 147                 return;
 148
 149         /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
 150          * allocated.
 151          */
 152         val = isp1760_readl(dst);
 153
 154         buff8 = (u8 *)src;
 155         while (len) {
 156
 157                 *buff8 = val;
 158                 val >>= 8;
 159                 len--;
 160                 buff8++;
 161         }
 162 }
 163
 164 static void priv_write_copy(const struct isp1760_hcd *priv, const u32 *src,
 165                 __u32 __iomem *dst, u32 len)
 166 {
 167         while (len >= 4) {
 168                 __raw_writel(*src, dst);
 169                 len -= 4;
 170                 src++;
 171                 dst++;
 172         }
 173
 174         if (!len)
 175                 return;
 176         /* in case we have 3, 2 or 1 by left. The buffer is allocated and the
 177          * extra bytes should not be read by the HW
 178          */
 179
 180         __raw_writel(*src, dst);
 181 }
 182
 183 /* memory management of the 60kb on the chip from 0x1000 to 0xffff */
 184 static void init_memory(struct isp1760_hcd *priv)
 185 {
 186         int i;
 187         u32 payload;
 188
 189         payload = 0x1000;
 190         for (i = 0; i < BLOCK_1_NUM; i++) {
 191                 priv->memory_pool[i].start = payload;
 192                 priv->memory_pool[i].size = BLOCK_1_SIZE;
 193                 priv->memory_pool[i].free = 1;
 194                 payload += priv->memory_pool[i].size;
 195         }
 196
 197
 198         for (i = BLOCK_1_NUM; i < BLOCK_1_NUM + BLOCK_2_NUM; i++) {
 199                 priv->memory_pool[i].start = payload;
 200                 priv->memory_pool[i].size = BLOCK_2_SIZE;
 201                 priv->memory_pool[i].free = 1;
 202                 payload += priv->memory_pool[i].size;
 203         }
 204
 205
 206         for (i = BLOCK_1_NUM + BLOCK_2_NUM; i < BLOCKS; i++) {
 207                 priv->memory_pool[i].start = payload;
 208                 priv->memory_pool[i].size = BLOCK_3_SIZE;
 209                 priv->memory_pool[i].free = 1;
 210                 payload += priv->memory_pool[i].size;
 211         }
 212
 213         BUG_ON(payload - priv->memory_pool[i - 1].size > PAYLOAD_SIZE);
 214 }
 215
 216 static u32 alloc_mem(struct isp1760_hcd *priv, u32 size)
 217 {
 218         int i;
 219
 220         if (!size)
 221                 return ISP1760_NULL_POINTER;
 222
 223         for (i = 0; i < BLOCKS; i++) {
 224                 if (priv->memory_pool[i].size >= size &&
 225                                 priv->memory_pool[i].free) {
 226
 227                         priv->memory_pool[i].free = 0;
 228                         return priv->memory_pool[i].start;
 229                 }
 230         }
 231
 232         printk(KERN_ERR "ISP1760 MEM: can not allocate %d bytes of memory\n",
 233                         size);
 234         printk(KERN_ERR "Current memory map:\n");
 235         for (i = 0; i < BLOCKS; i++) {
 236                 printk(KERN_ERR "Pool %2d size %4d status: %d\n",
 237                                 i, priv->memory_pool[i].size,
 238                                 priv->memory_pool[i].free);
 239         }
 240         /* XXX maybe -ENOMEM could be possible */
 241         BUG();
 242         return 0;
 243 }
 244
 245 static void free_mem(struct isp1760_hcd *priv, u32 mem)
 246 {
 247         int i;
 248
 249         if (mem == ISP1760_NULL_POINTER)
 250                 return;
 251
 252         for (i = 0; i < BLOCKS; i++) {
 253                 if (priv->memory_pool[i].start == mem) {
 254
 255                         BUG_ON(priv->memory_pool[i].free);
 256
 257                         priv->memory_pool[i].free = 1;
 258                         return ;
 259                 }
 260         }
 261
 262         printk(KERN_ERR "Trying to free not-here-allocated memory :%08x\n",
 263                         mem);
 264         BUG();
 265 }
 266
 267 static void isp1760_init_regs(struct usb_hcd *hcd)
 268 {
 269         isp1760_writel(0, hcd->regs + HC_BUFFER_STATUS_REG);
 270         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
 271                         HC_ATL_PTD_SKIPMAP_REG);
 272         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
 273                         HC_INT_PTD_SKIPMAP_REG);
 274         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
 275                         HC_ISO_PTD_SKIPMAP_REG);
 276
 277         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
 278                         HC_ATL_PTD_DONEMAP_REG);
 279         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
 280                         HC_INT_PTD_DONEMAP_REG);
 281         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
 282                         HC_ISO_PTD_DONEMAP_REG);
 283 }
 284
 285 static int handshake(struct isp1760_hcd *priv, void __iomem *ptr,
 286                       u32 mask, u32 done, int usec)
 287 {
 288         u32 result;
 289
 290         do {
 291                 result = isp1760_readl(ptr);
 292                 if (result == ~0)
 293                         return -ENODEV;
 294                 result &= mask;
 295                 if (result == done)
 296                         return 0;
 297                 udelay(1);
 298                 usec--;
 299         } while (usec > 0);
 300         return -ETIMEDOUT;
 301 }
 302
 303 /* reset a non-running (STS_HALT == 1) controller */
 304 static int ehci_reset(struct isp1760_hcd *priv)
 305 {
 306         int retval;
 307         struct usb_hcd *hcd = priv_to_hcd(priv);
 308         u32 command = isp1760_readl(hcd->regs + HC_USBCMD);
 309
 310         command |= CMD_RESET;
 311         isp1760_writel(command, hcd->regs + HC_USBCMD);
 312         hcd->state = HC_STATE_HALT;
 313         priv->next_statechange = jiffies;
 314         retval = handshake(priv, hcd->regs + HC_USBCMD,
 315                             CMD_RESET, 0, 250 * 1000);
 316         return retval;
 317 }
 318
 319 static void qh_destroy(struct isp1760_qh *qh)
 320 {
 321         BUG_ON(!list_empty(&qh->qtd_list));
 322         kmem_cache_free(qh_cachep, qh);
 323 }
 324
 325 static struct isp1760_qh *isp1760_qh_alloc(struct isp1760_hcd *priv,
 326                 gfp_t flags)
 327 {
 328         struct isp1760_qh *qh;
 329
 330         qh = kmem_cache_zalloc(qh_cachep, flags);
 331         if (!qh)
 332                 return qh;
 333
 334         INIT_LIST_HEAD(&qh->qtd_list);
 335         qh->priv = priv;
 336         return qh;
 337 }
 338
 339 /* magic numbers that can affect system performance */
 340 #define EHCI_TUNE_CERR          3       /* 0-3 qtd retries; 0 == don't stop */
 341 #define EHCI_TUNE_RL_HS         4       /* nak throttle; see 4.9 */
 342 #define EHCI_TUNE_RL_TT         0
 343 #define EHCI_TUNE_MULT_HS       1       /* 1-3 transactions/uframe; 4.10.3 */
 344 #define EHCI_TUNE_MULT_TT       1
 345 #define EHCI_TUNE_FLS           2       /* (small) 256 frame schedule */
 346
 347 /* one-time init, only for memory state */
 348 static int priv_init(struct usb_hcd *hcd)
 349 {
 350         struct isp1760_hcd              *priv = hcd_to_priv(hcd);
 351         u32                     hcc_params;
 352
 353         spin_lock_init(&priv->lock);
 354
 355         /*
 356          * hw default: 1K periodic list heads, one per frame.
 357          * periodic_size can shrink by USBCMD update if hcc_params allows.
 358          */
 359         priv->periodic_size = DEFAULT_I_TDPS;
 360
 361         /* controllers may cache some of the periodic schedule ... */
 362         hcc_params = isp1760_readl(hcd->regs + HC_HCCPARAMS);
 363         /* full frame cache */
 364         if (HCC_ISOC_CACHE(hcc_params))
 365                 priv->i_thresh = 8;
 366         else /* N microframes cached */
 367                 priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
 368
 369         return 0;
 370 }
 371
 372 static int isp1760_hc_setup(struct usb_hcd *hcd)
 373 {
 374         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 375         int result;
 376         u32 scratch, hwmode;
 377
 378         /* Setup HW Mode Control: This assumes a level active-low interrupt */
 379         hwmode = HW_DATA_BUS_32BIT;
 380
 381         if (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16)
 382                 hwmode &= ~HW_DATA_BUS_32BIT;
 383         if (priv->devflags & ISP1760_FLAG_ANALOG_OC)
 384                 hwmode |= HW_ANA_DIGI_OC;
 385         if (priv->devflags & ISP1760_FLAG_DACK_POL_HIGH)
 386                 hwmode |= HW_DACK_POL_HIGH;
 387         if (priv->devflags & ISP1760_FLAG_DREQ_POL_HIGH)
 388                 hwmode |= HW_DREQ_POL_HIGH;
 389
 390         /*
 391          * We have to set this first in case we're in 16-bit mode.
 392          * Write it twice to ensure correct upper bits if switching
 393          * to 16-bit mode.
 394          */
 395         isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
 396         isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
 397
 398         isp1760_writel(0xdeadbabe, hcd->regs + HC_SCRATCH_REG);
 399         /* Change bus pattern */
 400         scratch = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
 401         scratch = isp1760_readl(hcd->regs + HC_SCRATCH_REG);
 402         if (scratch != 0xdeadbabe) {
 403                 printk(KERN_ERR "ISP1760: Scratch test failed.\n");
 404                 return -ENODEV;
 405         }
 406
 407         /* pre reset */
 408         isp1760_init_regs(hcd);
 409
 410         /* reset */
 411         isp1760_writel(SW_RESET_RESET_ALL, hcd->regs + HC_RESET_REG);
 412         mdelay(100);
 413
 414         isp1760_writel(SW_RESET_RESET_HC, hcd->regs + HC_RESET_REG);
 415         mdelay(100);
 416
 417         result = ehci_reset(priv);
 418         if (result)
 419                 return result;
 420
 421         /* Step 11 passed */
 422
 423         isp1760_info(priv, "bus width: %d, oc: %s\n",
 424                            (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16) ?
 425                            16 : 32, (priv->devflags & ISP1760_FLAG_ANALOG_OC) ?
 426                            "analog" : "digital");
 427
 428         /* ATL reset */
 429         isp1760_writel(hwmode | ALL_ATX_RESET, hcd->regs + HC_HW_MODE_CTRL);
 430         mdelay(10);
 431         isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
 432
 433         isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_REG);
 434         isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_ENABLE);
 435
 436         /*
 437          * PORT 1 Control register of the ISP1760 is the OTG control
 438          * register on ISP1761.
 439          */
 440         if (!(priv->devflags & ISP1760_FLAG_ISP1761) &&
 441             !(priv->devflags & ISP1760_FLAG_PORT1_DIS)) {
 442                 isp1760_writel(PORT1_POWER | PORT1_INIT2,
 443                                hcd->regs + HC_PORT1_CTRL);
 444                 mdelay(10);
 445         }
 446
 447         priv->hcs_params = isp1760_readl(hcd->regs + HC_HCSPARAMS);
 448
 449         return priv_init(hcd);
 450 }
 451
 452 static void isp1760_init_maps(struct usb_hcd *hcd)
 453 {
 454         /*set last maps, for iso its only 1, else 32 tds bitmap*/
 455         isp1760_writel(0x80000000, hcd->regs + HC_ATL_PTD_LASTPTD_REG);
 456         isp1760_writel(0x80000000, hcd->regs + HC_INT_PTD_LASTPTD_REG);
 457         isp1760_writel(0x00000001, hcd->regs + HC_ISO_PTD_LASTPTD_REG);
 458 }
 459
 460 static void isp1760_enable_interrupts(struct usb_hcd *hcd)
 461 {
 462         isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_AND_REG);
 463         isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 464         isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_AND_REG);
 465         isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
 466         isp1760_writel(0, hcd->regs + HC_ISO_IRQ_MASK_AND_REG);
 467         isp1760_writel(0xffffffff, hcd->regs + HC_ISO_IRQ_MASK_OR_REG);
 468         /* step 23 passed */
 469 }
 470
 471 static int isp1760_run(struct usb_hcd *hcd)
 472 {
 473         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 474         int retval;
 475         u32 temp;
 476         u32 command;
 477         u32 chipid;
 478
 479         hcd->uses_new_polling = 1;
 480         hcd->poll_rh = 0;
 481
 482         hcd->state = HC_STATE_RUNNING;
 483         isp1760_enable_interrupts(hcd);
 484         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
 485         isp1760_writel(temp | HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
 486
 487         command = isp1760_readl(hcd->regs + HC_USBCMD);
 488         command &= ~(CMD_LRESET|CMD_RESET);
 489         command |= CMD_RUN;
 490         isp1760_writel(command, hcd->regs + HC_USBCMD);
 491
 492         retval = handshake(priv, hcd->regs + HC_USBCMD, CMD_RUN, CMD_RUN,
 493                         250 * 1000);
 494         if (retval)
 495                 return retval;
 496
 497         /*
 498          * XXX
 499          * Spec says to write FLAG_CF as last config action, priv code grabs
 500          * the semaphore while doing so.
 501          */
 502         down_write(&ehci_cf_port_reset_rwsem);
 503         isp1760_writel(FLAG_CF, hcd->regs + HC_CONFIGFLAG);
 504
 505         retval = handshake(priv, hcd->regs + HC_CONFIGFLAG, FLAG_CF, FLAG_CF,
 506                         250 * 1000);
 507         up_write(&ehci_cf_port_reset_rwsem);
 508         if (retval)
 509                 return retval;
 510
 511         chipid = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
 512         isp1760_info(priv, "USB ISP %04x HW rev. %d started\n", chipid & 0xffff,
 513                         chipid >> 16);
 514
 515         /* PTD Register Init Part 2, Step 28 */
 516         /* enable INTs */
 517         isp1760_init_maps(hcd);
 518
 519         /* GRR this is run-once init(), being done every time the HC starts.
 520          * So long as they're part of class devices, we can't do it init()
 521          * since the class device isn't created that early.
 522          */
 523         return 0;
 524 }
 525
 526 static u32 base_to_chip(u32 base)
 527 {
 528         return ((base - 0x400) >> 3);
 529 }
 530
 531 static void transform_into_atl(struct isp1760_hcd *priv, struct isp1760_qh *qh,
 532                         struct isp1760_qtd *qtd, struct urb *urb,
 533                         u32 payload, struct ptd *ptd)
 534 {
 535         u32 dw0;
 536         u32 dw1;
 537         u32 dw2;
 538         u32 dw3;
 539         u32 maxpacket;
 540         u32 multi;
 541         u32 pid_code;
 542         u32 rl = RL_COUNTER;
 543         u32 nak = NAK_COUNTER;
 544
 545         /* according to 3.6.2, max packet len can not be > 0x400 */
 546         maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
 547         multi =  1 + ((maxpacket >> 11) & 0x3);
 548         maxpacket &= 0x7ff;
 549
 550         /* DW0 */
 551         dw0 = PTD_VALID;
 552         dw0 |= PTD_LENGTH(qtd->length);
 553         dw0 |= PTD_MAXPACKET(maxpacket);
 554         dw0 |= PTD_ENDPOINT(usb_pipeendpoint(urb->pipe));
 555         dw1 = usb_pipeendpoint(urb->pipe) >> 1;
 556
 557         /* DW1 */
 558         dw1 |= PTD_DEVICE_ADDR(usb_pipedevice(urb->pipe));
 559
 560         pid_code = qtd->packet_type;
 561         dw1 |= PTD_PID_TOKEN(pid_code);
 562
 563         if (usb_pipebulk(urb->pipe))
 564                 dw1 |= PTD_TRANS_BULK;
 565         else if  (usb_pipeint(urb->pipe))
 566                 dw1 |= PTD_TRANS_INT;
 567
 568         if (urb->dev->speed != USB_SPEED_HIGH) {
 569                 /* split transaction */
 570
 571                 dw1 |= PTD_TRANS_SPLIT;
 572                 if (urb->dev->speed == USB_SPEED_LOW)
 573                         dw1 |= PTD_SE_USB_LOSPEED;
 574
 575                 dw1 |= PTD_PORT_NUM(urb->dev->ttport);
 576                 dw1 |= PTD_HUB_NUM(urb->dev->tt->hub->devnum);
 577
 578                 /* SE bit for Split INT transfers */
 579                 if (usb_pipeint(urb->pipe) &&
 580                                 (urb->dev->speed == USB_SPEED_LOW))
 581                         dw1 |= 2 << 16;
 582
 583                 dw3 = 0;
 584                 rl = 0;
 585                 nak = 0;
 586         } else {
 587                 dw0 |= PTD_MULTI(multi);
 588                 if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe))
 589                         dw3 = qh->ping;
 590                 else
 591                         dw3 = 0;
 592         }
 593         /* DW2 */
 594         dw2 = 0;
 595         dw2 |= PTD_DATA_START_ADDR(base_to_chip(payload));
 596         dw2 |= PTD_RL_CNT(rl);
 597         dw3 |= PTD_NAC_CNT(nak);
 598
 599         /* DW3 */
 600         if (usb_pipecontrol(urb->pipe))
 601                 dw3 |= PTD_DATA_TOGGLE(qtd->toggle);
 602         else
 603                 dw3 |= qh->toggle;
 604
 605
 606         dw3 |= PTD_ACTIVE;
 607         /* Cerr */
 608         dw3 |= PTD_CERR(ERR_COUNTER);
 609
 610         memset(ptd, 0, sizeof(*ptd));
 611
 612         ptd->dw0 = cpu_to_le32(dw0);
 613         ptd->dw1 = cpu_to_le32(dw1);
 614         ptd->dw2 = cpu_to_le32(dw2);
 615         ptd->dw3 = cpu_to_le32(dw3);
 616 }
 617
 618 static void transform_add_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
 619                         struct isp1760_qtd *qtd, struct urb *urb,
 620                         u32 payload, struct ptd *ptd)
 621 {
 622         u32 maxpacket;
 623         u32 multi;
 624         u32 numberofusofs;
 625         u32 i;
 626         u32 usofmask, usof;
 627         u32 period;
 628
 629         maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
 630         multi =  1 + ((maxpacket >> 11) & 0x3);
 631         maxpacket &= 0x7ff;
 632         /* length of the data per uframe */
 633         maxpacket = multi * maxpacket;
 634
 635         numberofusofs = urb->transfer_buffer_length / maxpacket;
 636         if (urb->transfer_buffer_length % maxpacket)
 637                 numberofusofs += 1;
 638
 639         usofmask = 1;
 640         usof = 0;
 641         for (i = 0; i < numberofusofs; i++) {
 642                 usof |= usofmask;
 643                 usofmask <<= 1;
 644         }
 645
 646         if (urb->dev->speed != USB_SPEED_HIGH) {
 647                 /* split */
 648                 ptd->dw5 = __constant_cpu_to_le32(0x1c);
 649
 650                 if (qh->period >= 32)
 651                         period = qh->period / 2;
 652                 else
 653                         period = qh->period;
 654
 655         } else {
 656
 657                 if (qh->period >= 8)
 658                         period = qh->period/8;
 659                 else
 660                         period = qh->period;
 661
 662                 if (period >= 32)
 663                         period  = 16;
 664
 665                 if (qh->period >= 8) {
 666                         /* millisecond period */
 667                         period = (period << 3);
 668                 } else {
 669                         /* usof based tranmsfers */
 670                         /* minimum 4 usofs */
 671                         usof = 0x11;
 672                 }
 673         }
 674
 675         ptd->dw2 |= cpu_to_le32(period);
 676         ptd->dw4 = cpu_to_le32(usof);
 677 }
 678
 679 static void transform_into_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
 680                         struct isp1760_qtd *qtd, struct urb *urb,
 681                         u32 payload, struct ptd *ptd)
 682 {
 683         transform_into_atl(priv, qh, qtd, urb, payload, ptd);
 684         transform_add_int(priv, qh, qtd, urb,  payload, ptd);
 685 }
 686
 687 static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len,
 688                 u32 token)
 689 {
 690         int count;
 691
 692         qtd->data_buffer = databuffer;
 693         qtd->packet_type = GET_QTD_TOKEN_TYPE(token);
 694         qtd->toggle = GET_DATA_TOGGLE(token);
 695
 696         if (len > HC_ATL_PL_SIZE)
 697                 count = HC_ATL_PL_SIZE;
 698         else
 699                 count = len;
 700
 701         qtd->length = count;
 702         return count;
 703 }
 704
 705 static int check_error(struct ptd *ptd)
 706 {
 707         int error = 0;
 708         u32 dw3;
 709
 710         dw3 = le32_to_cpu(ptd->dw3);
 711         if (dw3 & DW3_HALT_BIT)
 712                 error = -EPIPE;
 713
 714         if (dw3 & DW3_ERROR_BIT) {
 715                 printk(KERN_ERR "error bit is set in DW3\n");
 716                 error = -EPIPE;
 717         }
 718
 719         if (dw3 & DW3_QTD_ACTIVE) {
 720                 printk(KERN_ERR "transfer active bit is set DW3\n");
 721                 printk(KERN_ERR "nak counter: %d, rl: %d\n", (dw3 >> 19) & 0xf,
 722                                 (le32_to_cpu(ptd->dw2) >> 25) & 0xf);
 723         }
 724
 725         return error;
 726 }
 727
 728 static void check_int_err_status(u32 dw4)
 729 {
 730         u32 i;
 731
 732         dw4 >>= 8;
 733
 734         for (i = 0; i < 8; i++) {
 735                 switch (dw4 & 0x7) {
 736                 case INT_UNDERRUN:
 737                         printk(KERN_ERR "ERROR: under run , %d\n", i);
 738                         break;
 739
 740                 case INT_EXACT:
 741                         printk(KERN_ERR "ERROR: transaction error, %d\n", i);
 742                         break;
 743
 744                 case INT_BABBLE:
 745                         printk(KERN_ERR "ERROR: babble error, %d\n", i);
 746                         break;
 747                 }
 748                 dw4 >>= 3;
 749         }
 750 }
 751
 752 static void enqueue_one_qtd(struct isp1760_qtd *qtd, struct isp1760_hcd *priv,
 753                 u32 payload)
 754 {
 755         u32 token;
 756         struct usb_hcd *hcd = priv_to_hcd(priv);
 757
 758         token = qtd->packet_type;
 759
 760         if (qtd->length && (qtd->length <= HC_ATL_PL_SIZE)) {
 761                 switch (token) {
 762                 case IN_PID:
 763                         break;
 764                 case OUT_PID:
 765                 case SETUP_PID:
 766                         priv_write_copy(priv, qtd->data_buffer,
 767                                         hcd->regs + payload,
 768                                         qtd->length);
 769                 }
 770         }
 771 }
 772
 773 static void enqueue_one_atl_qtd(u32 atl_regs, u32 payload,
 774                 struct isp1760_hcd *priv, struct isp1760_qh *qh,
 775                 struct urb *urb, u32 slot, struct isp1760_qtd *qtd)
 776 {
 777         struct ptd ptd;
 778         struct usb_hcd *hcd = priv_to_hcd(priv);
 779
 780         transform_into_atl(priv, qh, qtd, urb, payload, &ptd);
 781         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + atl_regs, sizeof(ptd));
 782         enqueue_one_qtd(qtd, priv, payload);
 783
 784         priv->atl_ints[slot].urb = urb;
 785         priv->atl_ints[slot].qh = qh;
 786         priv->atl_ints[slot].qtd = qtd;
 787         priv->atl_ints[slot].data_buffer = qtd->data_buffer;
 788         priv->atl_ints[slot].payload = payload;
 789         qtd->status |= URB_ENQUEUED | URB_TYPE_ATL;
 790         qtd->status |= slot << 16;
 791 }
 792
 793 static void enqueue_one_int_qtd(u32 int_regs, u32 payload,
 794                 struct isp1760_hcd *priv, struct isp1760_qh *qh,
 795                 struct urb *urb, u32 slot,  struct isp1760_qtd *qtd)
 796 {
 797         struct ptd ptd;
 798         struct usb_hcd *hcd = priv_to_hcd(priv);
 799
 800         transform_into_int(priv, qh, qtd, urb, payload, &ptd);
 801         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + int_regs, sizeof(ptd));
 802         enqueue_one_qtd(qtd, priv, payload);
 803
 804         priv->int_ints[slot].urb = urb;
 805         priv->int_ints[slot].qh = qh;
 806         priv->int_ints[slot].qtd = qtd;
 807         priv->int_ints[slot].data_buffer = qtd->data_buffer;
 808         priv->int_ints[slot].payload = payload;
 809         qtd->status |= URB_ENQUEUED | URB_TYPE_INT;
 810         qtd->status |= slot << 16;
 811 }
 812
 813 static void enqueue_an_ATL_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
 814                                   struct isp1760_qtd *qtd)
 815 {
 816         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 817         u32 skip_map, or_map;
 818         u32 queue_entry;
 819         u32 slot;
 820         u32 atl_regs, payload;
 821         u32 buffstatus;
 822
 823         skip_map = isp1760_readl(hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
 824
 825         BUG_ON(!skip_map);
 826         slot = __ffs(skip_map);
 827         queue_entry = 1 << slot;
 828
 829         atl_regs = ATL_REGS_OFFSET + slot * sizeof(struct ptd);
 830
 831         payload = alloc_mem(priv, qtd->length);
 832
 833         enqueue_one_atl_qtd(atl_regs, payload, priv, qh, qtd->urb, slot, qtd);
 834
 835         or_map = isp1760_readl(hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 836         or_map |= queue_entry;
 837         isp1760_writel(or_map, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 838
 839         skip_map &= ~queue_entry;
 840         isp1760_writel(skip_map, hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
 841
 842         buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
 843         buffstatus |= ATL_BUFFER;
 844         isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
 845 }
 846
 847 static void enqueue_an_INT_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
 848                                   struct isp1760_qtd *qtd)
 849 {
 850         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 851         u32 skip_map, or_map;
 852         u32 queue_entry;
 853         u32 slot;
 854         u32 int_regs, payload;
 855         u32 buffstatus;
 856
 857         skip_map = isp1760_readl(hcd->regs + HC_INT_PTD_SKIPMAP_REG);
 858
 859         BUG_ON(!skip_map);
 860         slot = __ffs(skip_map);
 861         queue_entry = 1 << slot;
 862
 863         int_regs = INT_REGS_OFFSET + slot * sizeof(struct ptd);
 864
 865         payload = alloc_mem(priv, qtd->length);
 866
 867         enqueue_one_int_qtd(int_regs, payload, priv, qh, qtd->urb, slot, qtd);
 868
 869         or_map = isp1760_readl(hcd->regs + HC_INT_IRQ_MASK_OR_REG);
 870         or_map |= queue_entry;
 871         isp1760_writel(or_map, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
 872
 873         skip_map &= ~queue_entry;
 874         isp1760_writel(skip_map, hcd->regs + HC_INT_PTD_SKIPMAP_REG);
 875
 876         buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
 877         buffstatus |= INT_BUFFER;
 878         isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
 879 }
 880
 881 static void isp1760_urb_done(struct isp1760_hcd *priv, struct urb *urb, int status)
 882 __releases(priv->lock)
 883 __acquires(priv->lock)
 884 {
 885         if (!urb->unlinked) {
 886                 if (status == -EINPROGRESS)
 887                         status = 0;
 888         }
 889
 890         /* complete() can reenter this HCD */
 891         usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
 892         spin_unlock(&priv->lock);
 893         usb_hcd_giveback_urb(priv_to_hcd(priv), urb, status);
 894         spin_lock(&priv->lock);
 895 }
 896
 897 static void isp1760_qtd_free(struct isp1760_qtd *qtd)
 898 {
 899         kmem_cache_free(qtd_cachep, qtd);
 900 }
 901
 902 static struct isp1760_qtd *clean_this_qtd(struct isp1760_qtd *qtd)
 903 {
 904         struct isp1760_qtd *tmp_qtd;
 905
 906         tmp_qtd = qtd->hw_next;
 907         list_del(&qtd->qtd_list);
 908         isp1760_qtd_free(qtd);
 909         return tmp_qtd;
 910 }
 911
 912 /*
 913  * Remove this QTD from the QH list and free its memory. If this QTD
 914  * isn't the last one than remove also his successor(s).
 915  * Returns the QTD which is part of an new URB and should be enqueued.
 916  */
 917 static struct isp1760_qtd *clean_up_qtdlist(struct isp1760_qtd *qtd)
 918 {
 919         struct isp1760_qtd *tmp_qtd;
 920         int last_one;
 921
 922         do {
 923                 tmp_qtd = qtd->hw_next;
 924                 last_one = qtd->status & URB_COMPLETE_NOTIFY;
 925                 list_del(&qtd->qtd_list);
 926                 isp1760_qtd_free(qtd);
 927                 qtd = tmp_qtd;
 928         } while (!last_one && qtd);
 929
 930         return qtd;
 931 }
 932
 933 static void do_atl_int(struct usb_hcd *usb_hcd)
 934 {
 935         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
 936         u32 done_map, skip_map;
 937         struct ptd ptd;
 938         struct urb *urb = NULL;
 939         u32 atl_regs_base;
 940         u32 atl_regs;
 941         u32 queue_entry;
 942         u32 payload;
 943         u32 length;
 944         u32 or_map;
 945         u32 status = -EINVAL;
 946         int error;
 947         struct isp1760_qtd *qtd;
 948         struct isp1760_qh *qh;
 949         u32 rl;
 950         u32 nakcount;
 951
 952         done_map = isp1760_readl(usb_hcd->regs +
 953                         HC_ATL_PTD_DONEMAP_REG);
 954         skip_map = isp1760_readl(usb_hcd->regs +
 955                         HC_ATL_PTD_SKIPMAP_REG);
 956
 957         or_map = isp1760_readl(usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 958         or_map &= ~done_map;
 959         isp1760_writel(or_map, usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 960
 961         atl_regs_base = ATL_REGS_OFFSET;
 962         while (done_map) {
 963                 u32 dw1;
 964                 u32 dw2;
 965                 u32 dw3;
 966
 967                 status = 0;
 968
 969                 queue_entry = __ffs(done_map);
 970                 done_map &= ~(1 << queue_entry);
 971                 skip_map |= 1 << queue_entry;
 972
 973                 atl_regs = atl_regs_base + queue_entry * sizeof(struct ptd);
 974
 975                 urb = priv->atl_ints[queue_entry].urb;
 976                 qtd = priv->atl_ints[queue_entry].qtd;
 977                 qh = priv->atl_ints[queue_entry].qh;
 978                 payload = priv->atl_ints[queue_entry].payload;
 979
 980                 if (!qh) {
 981                         printk(KERN_ERR "qh is 0\n");
 982                         continue;
 983                 }
 984                 isp1760_writel(atl_regs + ISP_BANK(0), usb_hcd->regs +
 985                                 HC_MEMORY_REG);
 986                 isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
 987                                 HC_MEMORY_REG);
 988                 /*
 989                  * write bank1 address twice to ensure the 90ns delay (time
 990                  * between BANK0 write and the priv_read_copy() call is at
 991                  * least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 109ns)
 992                  */
 993                 isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
 994                                 HC_MEMORY_REG);
 995
 996                 priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + atl_regs +
 997                                 ISP_BANK(0), sizeof(ptd));
 998
 999                 dw1 = le32_to_cpu(ptd.dw1);
1000                 dw2 = le32_to_cpu(ptd.dw2);
1001                 dw3 = le32_to_cpu(ptd.dw3);
1002                 rl = (dw2 >> 25) & 0x0f;
1003                 nakcount = (dw3 >> 19) & 0xf;
1004
1005                 /* Transfer Error, *but* active and no HALT -> reload */
1006                 if ((dw3 & DW3_ERROR_BIT) && (dw3 & DW3_QTD_ACTIVE) &&
1007                                 !(dw3 & DW3_HALT_BIT)) {
1008
1009                         /* according to ppriv code, we have to
1010                          * reload this one if trasfered bytes != requested bytes
1011                          * else act like everything went smooth..
1012                          * XXX This just doesn't feel right and hasn't
1013                          * triggered so far.
1014                          */
1015
1016                         length = PTD_XFERRED_LENGTH(dw3);
1017                         printk(KERN_ERR "Should reload now.... transfered %d "
1018                                         "of %zu\n", length, qtd->length);
1019                         BUG();
1020                 }
1021
1022                 if (!nakcount && (dw3 & DW3_QTD_ACTIVE)) {
1023                         u32 buffstatus;
1024
1025                         /* XXX
1026                          * NAKs are handled in HW by the chip. Usually if the
1027                          * device is not able to send data fast enough.
1028                          * This did not trigger for a long time now.
1029                          */
1030                         printk(KERN_ERR "Reloading ptd %p/%p... qh %p readed: "
1031                                         "%d of %zu done: %08x cur: %08x\n", qtd,
1032                                         urb, qh, PTD_XFERRED_LENGTH(dw3),
1033                                         qtd->length, done_map,
1034                                         (1 << queue_entry));
1035
1036                         /* RL counter = ERR counter */
1037                         dw3 &= ~(0xf << 19);
1038                         dw3 |= rl << 19;
1039                         dw3 &= ~(3 << (55 - 32));
1040                         dw3 |= ERR_COUNTER << (55 - 32);
1041
1042                         /*
1043                          * It is not needed to write skip map back because it
1044                          * is unchanged. Just make sure that this entry is
1045                          * unskipped once it gets written to the HW.
1046                          */
1047                         skip_map &= ~(1 << queue_entry);
1048                         or_map = isp1760_readl(usb_hcd->regs +
1049                                         HC_ATL_IRQ_MASK_OR_REG);
1050                         or_map |= 1 << queue_entry;
1051                         isp1760_writel(or_map, usb_hcd->regs +
1052                                         HC_ATL_IRQ_MASK_OR_REG);
1053
1054                         ptd.dw3 = cpu_to_le32(dw3);
1055                         priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
1056                                         atl_regs, sizeof(ptd));
1057
1058                         ptd.dw0 |= __constant_cpu_to_le32(PTD_VALID);
1059                         priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
1060                                         atl_regs, sizeof(ptd));
1061
1062                         buffstatus = isp1760_readl(usb_hcd->regs +
1063                                         HC_BUFFER_STATUS_REG);
1064                         buffstatus |= ATL_BUFFER;
1065                         isp1760_writel(buffstatus, usb_hcd->regs +
1066                                         HC_BUFFER_STATUS_REG);
1067                         continue;
1068                 }
1069
1070                 error = check_error(&ptd);
1071                 if (error) {
1072                         status = error;
1073                         priv->atl_ints[queue_entry].qh->toggle = 0;
1074                         priv->atl_ints[queue_entry].qh->ping = 0;
1075                         urb->status = -EPIPE;
1076
1077 #if 0
1078                         printk(KERN_ERR "Error in %s().\n", __func__);
1079                         printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1080                                         "dw3: %08x dw4: %08x dw5: %08x dw6: "
1081                                         "%08x dw7: %08x\n",
1082                                         ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1083                                         ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1084 #endif
1085                 } else {
1086                         if (usb_pipetype(urb->pipe) == PIPE_BULK) {
1087                                 priv->atl_ints[queue_entry].qh->toggle = dw3 &
1088                                         (1 << 25);
1089                                 priv->atl_ints[queue_entry].qh->ping = dw3 &
1090                                         (1 << 26);
1091                         }
1092                 }
1093
1094                 length = PTD_XFERRED_LENGTH(dw3);
1095                 if (length) {
1096                         switch (DW1_GET_PID(dw1)) {
1097                         case IN_PID:
1098                                 priv_read_copy(priv,
1099                                         priv->atl_ints[queue_entry].data_buffer,
1100                                         usb_hcd->regs + payload + ISP_BANK(1),
1101                                         length);
1102
1103                         case OUT_PID:
1104
1105                                 urb->actual_length += length;
1106
1107                         case SETUP_PID:
1108                                 break;
1109                         }
1110                 }
1111
1112                 priv->atl_ints[queue_entry].data_buffer = NULL;
1113                 priv->atl_ints[queue_entry].urb = NULL;
1114                 priv->atl_ints[queue_entry].qtd = NULL;
1115                 priv->atl_ints[queue_entry].qh = NULL;
1116
1117                 free_mem(priv, payload);
1118
1119                 isp1760_writel(skip_map, usb_hcd->regs +
1120                                 HC_ATL_PTD_SKIPMAP_REG);
1121
1122                 if (urb->status == -EPIPE) {
1123                         /* HALT was received */
1124
1125                         qtd = clean_up_qtdlist(qtd);
1126                         isp1760_urb_done(priv, urb, urb->status);
1127
1128                 } else if (usb_pipebulk(urb->pipe) && (length < qtd->length)) {
1129                         /* short BULK received */
1130
1131                         if (urb->transfer_flags & URB_SHORT_NOT_OK) {
1132                                 urb->status = -EREMOTEIO;
1133                                 isp1760_dbg(priv, "short bulk, %d instead %zu "
1134                                         "with URB_SHORT_NOT_OK flag.\n",
1135                                         length, qtd->length);
1136                         }
1137
1138                         if (urb->status == -EINPROGRESS)
1139                                 urb->status = 0;
1140
1141                         qtd = clean_up_qtdlist(qtd);
1142
1143                         isp1760_urb_done(priv, urb, urb->status);
1144
1145                 } else if (qtd->status & URB_COMPLETE_NOTIFY) {
1146                         /* that was the last qtd of that URB */
1147
1148                         if (urb->status == -EINPROGRESS)
1149                                 urb->status = 0;
1150
1151                         qtd = clean_this_qtd(qtd);
1152                         isp1760_urb_done(priv, urb, urb->status);
1153
1154                 } else {
1155                         /* next QTD of this URB */
1156
1157                         qtd = clean_this_qtd(qtd);
1158                         BUG_ON(!qtd);
1159                 }
1160
1161                 if (qtd)
1162                         enqueue_an_ATL_packet(usb_hcd, qh, qtd);
1163
1164                 skip_map = isp1760_readl(usb_hcd->regs +
1165                                 HC_ATL_PTD_SKIPMAP_REG);
1166         }
1167 }
1168
1169 static void do_intl_int(struct usb_hcd *usb_hcd)
1170 {
1171         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
1172         u32 done_map, skip_map;
1173         struct ptd ptd;
1174         struct urb *urb = NULL;
1175         u32 int_regs;
1176         u32 int_regs_base;
1177         u32 payload;
1178         u32 length;
1179         u32 or_map;
1180         int error;
1181         u32 queue_entry;
1182         struct isp1760_qtd *qtd;
1183         struct isp1760_qh *qh;
1184
1185         done_map = isp1760_readl(usb_hcd->regs +
1186                         HC_INT_PTD_DONEMAP_REG);
1187         skip_map = isp1760_readl(usb_hcd->regs +
1188                         HC_INT_PTD_SKIPMAP_REG);
1189
1190         or_map = isp1760_readl(usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
1191         or_map &= ~done_map;
1192         isp1760_writel(or_map, usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
1193
1194         int_regs_base = INT_REGS_OFFSET;
1195
1196         while (done_map) {
1197                 u32 dw1;
1198                 u32 dw3;
1199
1200                 queue_entry = __ffs(done_map);
1201                 done_map &= ~(1 << queue_entry);
1202                 skip_map |= 1 << queue_entry;
1203
1204                 int_regs = int_regs_base + queue_entry * sizeof(struct ptd);
1205                 urb = priv->int_ints[queue_entry].urb;
1206                 qtd = priv->int_ints[queue_entry].qtd;
1207                 qh = priv->int_ints[queue_entry].qh;
1208                 payload = priv->int_ints[queue_entry].payload;
1209
1210                 if (!qh) {
1211                         printk(KERN_ERR "(INT) qh is 0\n");
1212                         continue;
1213                 }
1214
1215                 isp1760_writel(int_regs + ISP_BANK(0), usb_hcd->regs +
1216                                 HC_MEMORY_REG);
1217                 isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
1218                                 HC_MEMORY_REG);
1219                 /*
1220                  * write bank1 address twice to ensure the 90ns delay (time
1221                  * between BANK0 write and the priv_read_copy() call is at
1222                  * least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 92ns)
1223                  */
1224                 isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
1225                                 HC_MEMORY_REG);
1226
1227                 priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + int_regs +
1228                                 ISP_BANK(0), sizeof(ptd));
1229                 dw1 = le32_to_cpu(ptd.dw1);
1230                 dw3 = le32_to_cpu(ptd.dw3);
1231                 check_int_err_status(le32_to_cpu(ptd.dw4));
1232
1233                 error = check_error(&ptd);
1234                 if (error) {
1235 #if 0
1236                         printk(KERN_ERR "Error in %s().\n", __func__);
1237                         printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1238                                         "dw3: %08x dw4: %08x dw5: %08x dw6: "
1239                                         "%08x dw7: %08x\n",
1240                                         ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1241                                         ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1242 #endif
1243                         urb->status = -EPIPE;
1244                         priv->int_ints[queue_entry].qh->toggle = 0;
1245                         priv->int_ints[queue_entry].qh->ping = 0;
1246
1247                 } else {
1248                         priv->int_ints[queue_entry].qh->toggle =
1249                                 dw3 & (1 << 25);
1250                         priv->int_ints[queue_entry].qh->ping = dw3 & (1 << 26);
1251                 }
1252
1253                 if (urb->dev->speed != USB_SPEED_HIGH)
1254                         length = PTD_XFERRED_LENGTH_LO(dw3);
1255                 else
1256                         length = PTD_XFERRED_LENGTH(dw3);
1257
1258                 if (length) {
1259                         switch (DW1_GET_PID(dw1)) {
1260                         case IN_PID:
1261                                 priv_read_copy(priv,
1262                                         priv->int_ints[queue_entry].data_buffer,
1263                                         usb_hcd->regs + payload + ISP_BANK(1),
1264                                         length);
1265                         case OUT_PID:
1266
1267                                 urb->actual_length += length;
1268
1269                         case SETUP_PID:
1270                                 break;
1271                         }
1272                 }
1273
1274                 priv->int_ints[queue_entry].data_buffer = NULL;
1275                 priv->int_ints[queue_entry].urb = NULL;
1276                 priv->int_ints[queue_entry].qtd = NULL;
1277                 priv->int_ints[queue_entry].qh = NULL;
1278
1279                 isp1760_writel(skip_map, usb_hcd->regs +
1280                                 HC_INT_PTD_SKIPMAP_REG);
1281                 free_mem(priv, payload);
1282
1283                 if (urb->status == -EPIPE) {
1284                         /* HALT received */
1285
1286                          qtd = clean_up_qtdlist(qtd);
1287                          isp1760_urb_done(priv, urb, urb->status);
1288
1289                 } else if (qtd->status & URB_COMPLETE_NOTIFY) {
1290
1291                         if (urb->status == -EINPROGRESS)
1292                                 urb->status = 0;
1293
1294                         qtd = clean_this_qtd(qtd);
1295                         isp1760_urb_done(priv, urb, urb->status);
1296
1297                 } else {
1298                         /* next QTD of this URB */
1299
1300                         qtd = clean_this_qtd(qtd);
1301                         BUG_ON(!qtd);
1302                 }
1303
1304                 if (qtd)
1305                         enqueue_an_INT_packet(usb_hcd, qh, qtd);
1306
1307                 skip_map = isp1760_readl(usb_hcd->regs +
1308                                 HC_INT_PTD_SKIPMAP_REG);
1309         }
1310 }
1311
1312 #define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
1313 static struct isp1760_qh *qh_make(struct isp1760_hcd *priv, struct urb *urb,
1314                 gfp_t flags)
1315 {
1316         struct isp1760_qh *qh;
1317         int is_input, type;
1318
1319         qh = isp1760_qh_alloc(priv, flags);
1320         if (!qh)
1321                 return qh;
1322
1323         /*
1324          * init endpoint/device data for this QH
1325          */
1326         is_input = usb_pipein(urb->pipe);
1327         type = usb_pipetype(urb->pipe);
1328
1329         if (type == PIPE_INTERRUPT) {
1330
1331                 if (urb->dev->speed == USB_SPEED_HIGH) {
1332
1333                         qh->period = urb->interval >> 3;
1334                         if (qh->period == 0 && urb->interval != 1) {
1335                                 /* NOTE interval 2 or 4 uframes could work.
1336                                  * But interval 1 scheduling is simpler, and
1337                                  * includes high bandwidth.
1338                                  */
1339                                 printk(KERN_ERR "intr period %d uframes, NYET!",
1340                                                 urb->interval);
1341                                 qh_destroy(qh);
1342                                 return NULL;
1343                         }
1344                 } else {
1345                         qh->period = urb->interval;
1346                 }
1347         }
1348
1349         /* support for tt scheduling, and access to toggles */
1350         qh->dev = urb->dev;
1351
1352         if (!usb_pipecontrol(urb->pipe))
1353                 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input,
1354                                 1);
1355         return qh;
1356 }
1357
1358 /*
1359  * For control/bulk/interrupt, return QH with these TDs appended.
1360  * Allocates and initializes the QH if necessary.
1361  * Returns null if it can't allocate a QH it needs to.
1362  * If the QH has TDs (urbs) already, that's great.
1363  */
1364 static struct isp1760_qh *qh_append_tds(struct isp1760_hcd *priv,
1365                 struct urb *urb, struct list_head *qtd_list, int epnum,
1366                 void **ptr)
1367 {
1368         struct isp1760_qh *qh;
1369         struct isp1760_qtd *qtd;
1370         struct isp1760_qtd *prev_qtd;
1371
1372         qh = (struct isp1760_qh *)*ptr;
1373         if (!qh) {
1374                 /* can't sleep here, we have priv->lock... */
1375                 qh = qh_make(priv, urb, GFP_ATOMIC);
1376                 if (!qh)
1377                         return qh;
1378                 *ptr = qh;
1379         }
1380
1381         qtd = list_entry(qtd_list->next, struct isp1760_qtd,
1382                         qtd_list);
1383         if (!list_empty(&qh->qtd_list))
1384                 prev_qtd = list_entry(qh->qtd_list.prev,
1385                                 struct isp1760_qtd, qtd_list);
1386         else
1387                 prev_qtd = NULL;
1388
1389         list_splice(qtd_list, qh->qtd_list.prev);
1390         if (prev_qtd) {
1391                 BUG_ON(prev_qtd->hw_next);
1392                 prev_qtd->hw_next = qtd;
1393         }
1394
1395         urb->hcpriv = qh;
1396         return qh;
1397 }
1398
1399 static void qtd_list_free(struct isp1760_hcd *priv, struct urb *urb,
1400                 struct list_head *qtd_list)
1401 {
1402         struct list_head *entry, *temp;
1403
1404         list_for_each_safe(entry, temp, qtd_list) {
1405                 struct isp1760_qtd      *qtd;
1406
1407                 qtd = list_entry(entry, struct isp1760_qtd, qtd_list);
1408                 list_del(&qtd->qtd_list);
1409                 isp1760_qtd_free(qtd);
1410         }
1411 }
1412
1413 static int isp1760_prepare_enqueue(struct isp1760_hcd *priv, struct urb *urb,
1414                 struct list_head *qtd_list, gfp_t mem_flags, packet_enqueue *p)
1415 {
1416         struct isp1760_qtd         *qtd;
1417         int                     epnum;
1418         unsigned long           flags;
1419         struct isp1760_qh          *qh = NULL;
1420         int                     rc;
1421         int qh_busy;
1422
1423         qtd = list_entry(qtd_list->next, struct isp1760_qtd, qtd_list);
1424         epnum = urb->ep->desc.bEndpointAddress;
1425
1426         spin_lock_irqsave(&priv->lock, flags);
1427         if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &priv_to_hcd(priv)->flags)) {
1428                 rc = -ESHUTDOWN;
1429                 goto done;
1430         }
1431         rc = usb_hcd_link_urb_to_ep(priv_to_hcd(priv), urb);
1432         if (rc)
1433                 goto done;
1434
1435         qh = urb->ep->hcpriv;
1436         if (qh)
1437                 qh_busy = !list_empty(&qh->qtd_list);
1438         else
1439                 qh_busy = 0;
1440
1441         qh = qh_append_tds(priv, urb, qtd_list, epnum, &urb->ep->hcpriv);
1442         if (!qh) {
1443                 usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
1444                 rc = -ENOMEM;
1445                 goto done;
1446         }
1447
1448         if (!qh_busy)
1449                 p(priv_to_hcd(priv), qh, qtd);
1450
1451 done:
1452         spin_unlock_irqrestore(&priv->lock, flags);
1453         if (!qh)
1454                 qtd_list_free(priv, urb, qtd_list);
1455         return rc;
1456 }
1457
1458 static struct isp1760_qtd *isp1760_qtd_alloc(struct isp1760_hcd *priv,
1459                 gfp_t flags)
1460 {
1461         struct isp1760_qtd *qtd;
1462
1463         qtd = kmem_cache_zalloc(qtd_cachep, flags);
1464         if (qtd)
1465                 INIT_LIST_HEAD(&qtd->qtd_list);
1466
1467         return qtd;
1468 }
1469
1470 /*
1471  * create a list of filled qtds for this URB; won't link into qh.
1472  */
1473 static struct list_head *qh_urb_transaction(struct isp1760_hcd *priv,
1474                 struct urb *urb, struct list_head *head, gfp_t flags)
1475 {
1476         struct isp1760_qtd *qtd, *qtd_prev;
1477         void *buf;
1478         int len, maxpacket;
1479         int is_input;
1480         u32 token;
1481
1482         /*
1483          * URBs map to sequences of QTDs:  one logical transaction
1484          */
1485         qtd = isp1760_qtd_alloc(priv, flags);
1486         if (!qtd)
1487                 return NULL;
1488
1489         list_add_tail(&qtd->qtd_list, head);
1490         qtd->urb = urb;
1491         urb->status = -EINPROGRESS;
1492
1493         token = 0;
1494         /* for split transactions, SplitXState initialized to zero */
1495
1496         len = urb->transfer_buffer_length;
1497         is_input = usb_pipein(urb->pipe);
1498         if (usb_pipecontrol(urb->pipe)) {
1499                 /* SETUP pid */
1500                 qtd_fill(qtd, urb->setup_packet,
1501                                 sizeof(struct usb_ctrlrequest),
1502                                 token | SETUP_PID);
1503
1504                 /* ... and always at least one more pid */
1505                 token ^= DATA_TOGGLE;
1506                 qtd_prev = qtd;
1507                 qtd = isp1760_qtd_alloc(priv, flags);
1508                 if (!qtd)
1509                         goto cleanup;
1510                 qtd->urb = urb;
1511                 qtd_prev->hw_next = qtd;
1512                 list_add_tail(&qtd->qtd_list, head);
1513
1514                 /* for zero length DATA stages, STATUS is always IN */
1515                 if (len == 0)
1516                         token |= IN_PID;
1517         }
1518
1519         /*
1520          * data transfer stage:  buffer setup
1521          */
1522         buf = urb->transfer_buffer;
1523
1524         if (is_input)
1525                 token |= IN_PID;
1526         else
1527                 token |= OUT_PID;
1528
1529         maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input));
1530
1531         /*
1532          * buffer gets wrapped in one or more qtds;
1533          * last one may be "short" (including zero len)
1534          * and may serve as a control status ack
1535          */
1536         for (;;) {
1537                 int this_qtd_len;
1538
1539                 if (!buf && len) {
1540                         /* XXX This looks like usb storage / SCSI bug */
1541                         printk(KERN_ERR "buf is null, dma is %08lx len is %d\n",
1542                                         (long unsigned)urb->transfer_dma, len);
1543                         WARN_ON(1);
1544                 }
1545
1546                 this_qtd_len = qtd_fill(qtd, buf, len, token);
1547                 len -= this_qtd_len;
1548                 buf += this_qtd_len;
1549
1550                 /* qh makes control packets use qtd toggle; maybe switch it */
1551                 if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0)
1552                         token ^= DATA_TOGGLE;
1553
1554                 if (len <= 0)
1555                         break;
1556
1557                 qtd_prev = qtd;
1558                 qtd = isp1760_qtd_alloc(priv, flags);
1559                 if (!qtd)
1560                         goto cleanup;
1561                 qtd->urb = urb;
1562                 qtd_prev->hw_next = qtd;
1563                 list_add_tail(&qtd->qtd_list, head);
1564         }
1565
1566         /*
1567          * control requests may need a terminating data "status" ack;
1568          * bulk ones may need a terminating short packet (zero length).
1569          */
1570         if (urb->transfer_buffer_length != 0) {
1571                 int one_more = 0;
1572
1573                 if (usb_pipecontrol(urb->pipe)) {
1574                         one_more = 1;
1575                         /* "in" <--> "out"  */
1576                         token ^= IN_PID;
1577                         /* force DATA1 */
1578                         token |= DATA_TOGGLE;
1579                 } else if (usb_pipebulk(urb->pipe)
1580                                 && (urb->transfer_flags & URB_ZERO_PACKET)
1581                                 && !(urb->transfer_buffer_length % maxpacket)) {
1582                         one_more = 1;
1583                 }
1584                 if (one_more) {
1585                         qtd_prev = qtd;
1586                         qtd = isp1760_qtd_alloc(priv, flags);
1587                         if (!qtd)
1588                                 goto cleanup;
1589                         qtd->urb = urb;
1590                         qtd_prev->hw_next = qtd;
1591                         list_add_tail(&qtd->qtd_list, head);
1592
1593                         /* never any data in such packets */
1594                         qtd_fill(qtd, NULL, 0, token);
1595                 }
1596         }
1597
1598         qtd->status = URB_COMPLETE_NOTIFY;
1599         return head;
1600
1601 cleanup:
1602         qtd_list_free(priv, urb, head);
1603         return NULL;
1604 }
1605
1606 static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
1607                 gfp_t mem_flags)
1608 {
1609         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1610         struct list_head qtd_list;
1611         packet_enqueue *pe;
1612
1613         INIT_LIST_HEAD(&qtd_list);
1614
1615         switch (usb_pipetype(urb->pipe)) {
1616         case PIPE_CONTROL:
1617         case PIPE_BULK:
1618
1619                 if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
1620                         return -ENOMEM;
1621                 pe =  enqueue_an_ATL_packet;
1622                 break;
1623
1624         case PIPE_INTERRUPT:
1625                 if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
1626                         return -ENOMEM;
1627                 pe = enqueue_an_INT_packet;
1628                 break;
1629
1630         case PIPE_ISOCHRONOUS:
1631                 printk(KERN_ERR "PIPE_ISOCHRONOUS ain't supported\n");
1632         default:
1633                 return -EPIPE;
1634         }
1635
1636         return isp1760_prepare_enqueue(priv, urb, &qtd_list, mem_flags, pe);
1637 }
1638
1639 static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
1640                 int status)
1641 {
1642         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1643         struct inter_packet_info *ints;
1644         u32 i;
1645         u32 reg_base, or_reg, skip_reg;
1646         unsigned long flags;
1647         struct ptd ptd;
1648
1649         switch (usb_pipetype(urb->pipe)) {
1650         case PIPE_ISOCHRONOUS:
1651                 return -EPIPE;
1652                 break;
1653
1654         case PIPE_INTERRUPT:
1655                 ints = priv->int_ints;
1656                 reg_base = INT_REGS_OFFSET;
1657                 or_reg = HC_INT_IRQ_MASK_OR_REG;
1658                 skip_reg = HC_INT_PTD_SKIPMAP_REG;
1659                 break;
1660
1661         default:
1662                 ints = priv->atl_ints;
1663                 reg_base = ATL_REGS_OFFSET;
1664                 or_reg = HC_ATL_IRQ_MASK_OR_REG;
1665                 skip_reg = HC_ATL_PTD_SKIPMAP_REG;
1666                 break;
1667         }
1668
1669         memset(&ptd, 0, sizeof(ptd));
1670         spin_lock_irqsave(&priv->lock, flags);
1671
1672         for (i = 0; i < 32; i++) {
1673                 if (ints->urb == urb) {
1674                         u32 skip_map;
1675                         u32 or_map;
1676                         struct isp1760_qtd *qtd;
1677
1678                         skip_map = isp1760_readl(hcd->regs + skip_reg);
1679                         skip_map |= 1 << i;
1680                         isp1760_writel(skip_map, hcd->regs + skip_reg);
1681
1682                         or_map = isp1760_readl(hcd->regs + or_reg);
1683                         or_map &= ~(1 << i);
1684                         isp1760_writel(or_map, hcd->regs + or_reg);
1685
1686                         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + reg_base
1687                                         + i * sizeof(ptd), sizeof(ptd));
1688                         qtd = ints->qtd;
1689
1690                         clean_up_qtdlist(qtd);
1691
1692                         free_mem(priv, ints->payload);
1693
1694                         ints->urb = NULL;
1695                         ints->qh = NULL;
1696                         ints->qtd = NULL;
1697                         ints->data_buffer = NULL;
1698                         ints->payload = 0;
1699
1700                         isp1760_urb_done(priv, urb, status);
1701                         break;
1702                 }
1703                 ints++;
1704         }
1705
1706         spin_unlock_irqrestore(&priv->lock, flags);
1707         return 0;
1708 }
1709
1710 static irqreturn_t isp1760_irq(struct usb_hcd *usb_hcd)
1711 {
1712         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
1713         u32 imask;
1714         irqreturn_t irqret = IRQ_NONE;
1715
1716         spin_lock(&priv->lock);
1717
1718         if (!(usb_hcd->state & HC_STATE_RUNNING))
1719                 goto leave;
1720
1721         imask = isp1760_readl(usb_hcd->regs + HC_INTERRUPT_REG);
1722         if (unlikely(!imask))
1723                 goto leave;
1724
1725         isp1760_writel(imask, usb_hcd->regs + HC_INTERRUPT_REG);
1726         if (imask & HC_ATL_INT)
1727                 do_atl_int(usb_hcd);
1728
1729         if (imask & HC_INTL_INT)
1730                 do_intl_int(usb_hcd);
1731
1732         irqret = IRQ_HANDLED;
1733 leave:
1734         spin_unlock(&priv->lock);
1735         return irqret;
1736 }
1737
1738 static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf)
1739 {
1740         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1741         u32 temp, status = 0;
1742         u32 mask;
1743         int retval = 1;
1744         unsigned long flags;
1745
1746         /* if !USB_SUSPEND, root hub timers won't get shut down ... */
1747         if (!HC_IS_RUNNING(hcd->state))
1748                 return 0;
1749
1750         /* init status to no-changes */
1751         buf[0] = 0;
1752         mask = PORT_CSC;
1753
1754         spin_lock_irqsave(&priv->lock, flags);
1755         temp = isp1760_readl(hcd->regs + HC_PORTSC1);
1756
1757         if (temp & PORT_OWNER) {
1758                 if (temp & PORT_CSC) {
1759                         temp &= ~PORT_CSC;
1760                         isp1760_writel(temp, hcd->regs + HC_PORTSC1);
1761                         goto done;
1762                 }
1763         }
1764
1765         /*
1766          * Return status information even for ports with OWNER set.
1767          * Otherwise khubd wouldn't see the disconnect event when a
1768          * high-speed device is switched over to the companion
1769          * controller by the user.
1770          */
1771
1772         if ((temp & mask) != 0
1773                         || ((temp & PORT_RESUME) != 0
1774                                 && time_after_eq(jiffies,
1775                                         priv->reset_done))) {
1776                 buf [0] |= 1 << (0 + 1);
1777                 status = STS_PCD;
1778         }
1779         /* FIXME autosuspend idle root hubs */
1780 done:
1781         spin_unlock_irqrestore(&priv->lock, flags);
1782         return status ? retval : 0;
1783 }
1784
1785 static void isp1760_hub_descriptor(struct isp1760_hcd *priv,
1786                 struct usb_hub_descriptor *desc)
1787 {
1788         int ports = HCS_N_PORTS(priv->hcs_params);
1789         u16 temp;
1790
1791         desc->bDescriptorType = 0x29;
1792         /* priv 1.0, 2.3.9 says 20ms max */
1793         desc->bPwrOn2PwrGood = 10;
1794         desc->bHubContrCurrent = 0;
1795
1796         desc->bNbrPorts = ports;
1797         temp = 1 + (ports / 8);
1798         desc->bDescLength = 7 + 2 * temp;
1799
1800         /* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
1801         memset(&desc->bitmap[0], 0, temp);
1802         memset(&desc->bitmap[temp], 0xff, temp);
1803
1804         /* per-port overcurrent reporting */
1805         temp = 0x0008;
1806         if (HCS_PPC(priv->hcs_params))
1807                 /* per-port power control */
1808                 temp |= 0x0001;
1809         else
1810                 /* no power switching */
1811                 temp |= 0x0002;
1812         desc->wHubCharacteristics = cpu_to_le16(temp);
1813 }
1814
1815 #define PORT_WAKE_BITS  (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
1816
1817 static int check_reset_complete(struct isp1760_hcd *priv, int index,
1818                 u32 __iomem *status_reg, int port_status)
1819 {
1820         if (!(port_status & PORT_CONNECT))
1821                 return port_status;
1822
1823         /* if reset finished and it's still not enabled -- handoff */
1824         if (!(port_status & PORT_PE)) {
1825
1826                 printk(KERN_ERR "port %d full speed --> companion\n",
1827                         index + 1);
1828
1829                 port_status |= PORT_OWNER;
1830                 port_status &= ~PORT_RWC_BITS;
1831                 isp1760_writel(port_status, status_reg);
1832
1833         } else
1834                 printk(KERN_ERR "port %d high speed\n", index + 1);
1835
1836         return port_status;
1837 }
1838
1839 static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq,
1840                 u16 wValue, u16 wIndex, char *buf, u16 wLength)
1841 {
1842         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1843         int ports = HCS_N_PORTS(priv->hcs_params);
1844         u32 __iomem *status_reg = hcd->regs + HC_PORTSC1;
1845         u32 temp, status;
1846         unsigned long flags;
1847         int retval = 0;
1848         unsigned selector;
1849
1850         /*
1851          * FIXME:  support SetPortFeatures USB_PORT_FEAT_INDICATOR.
1852          * HCS_INDICATOR may say we can change LEDs to off/amber/green.
1853          * (track current state ourselves) ... blink for diagnostics,
1854          * power, "this is the one", etc.  EHCI spec supports this.
1855          */
1856
1857         spin_lock_irqsave(&priv->lock, flags);
1858         switch (typeReq) {
1859         case ClearHubFeature:
1860                 switch (wValue) {
1861                 case C_HUB_LOCAL_POWER:
1862                 case C_HUB_OVER_CURRENT:
1863                         /* no hub-wide feature/status flags */
1864                         break;
1865                 default:
1866                         goto error;
1867                 }
1868                 break;
1869         case ClearPortFeature:
1870                 if (!wIndex || wIndex > ports)
1871                         goto error;
1872                 wIndex--;
1873                 temp = isp1760_readl(status_reg);
1874
1875                 /*
1876                  * Even if OWNER is set, so the port is owned by the
1877                  * companion controller, khubd needs to be able to clear
1878                  * the port-change status bits (especially
1879                  * USB_PORT_FEAT_C_CONNECTION).
1880                  */
1881
1882                 switch (wValue) {
1883                 case USB_PORT_FEAT_ENABLE:
1884                         isp1760_writel(temp & ~PORT_PE, status_reg);
1885                         break;
1886                 case USB_PORT_FEAT_C_ENABLE:
1887                         /* XXX error? */
1888                         break;
1889                 case USB_PORT_FEAT_SUSPEND:
1890                         if (temp & PORT_RESET)
1891                                 goto error;
1892
1893                         if (temp & PORT_SUSPEND) {
1894                                 if ((temp & PORT_PE) == 0)
1895                                         goto error;
1896                                 /* resume signaling for 20 msec */
1897                                 temp &= ~(PORT_RWC_BITS);
1898                                 isp1760_writel(temp | PORT_RESUME,
1899                                                 status_reg);
1900                                 priv->reset_done = jiffies +
1901                                         msecs_to_jiffies(20);
1902                         }
1903                         break;
1904                 case USB_PORT_FEAT_C_SUSPEND:
1905                         /* we auto-clear this feature */
1906                         break;
1907                 case USB_PORT_FEAT_POWER:
1908                         if (HCS_PPC(priv->hcs_params))
1909                                 isp1760_writel(temp & ~PORT_POWER, status_reg);
1910                         break;
1911                 case USB_PORT_FEAT_C_CONNECTION:
1912                         isp1760_writel(temp | PORT_CSC,
1913                                         status_reg);
1914                         break;
1915                 case USB_PORT_FEAT_C_OVER_CURRENT:
1916                         /* XXX error ?*/
1917                         break;
1918                 case USB_PORT_FEAT_C_RESET:
1919                         /* GetPortStatus clears reset */
1920                         break;
1921                 default:
1922                         goto error;
1923                 }
1924                 isp1760_readl(hcd->regs + HC_USBCMD);
1925                 break;
1926         case GetHubDescriptor:
1927                 isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *)
1928                         buf);
1929                 break;
1930         case GetHubStatus:
1931                 /* no hub-wide feature/status flags */
1932                 memset(buf, 0, 4);
1933                 break;
1934         case GetPortStatus:
1935                 if (!wIndex || wIndex > ports)
1936                         goto error;
1937                 wIndex--;
1938                 status = 0;
1939                 temp = isp1760_readl(status_reg);
1940
1941                 /* wPortChange bits */
1942                 if (temp & PORT_CSC)
1943                         status |= 1 << USB_PORT_FEAT_C_CONNECTION;
1944
1945
1946                 /* whoever resumes must GetPortStatus to complete it!! */
1947                 if (temp & PORT_RESUME) {
1948                         printk(KERN_ERR "Port resume should be skipped.\n");
1949
1950                         /* Remote Wakeup received? */
1951                         if (!priv->reset_done) {
1952                                 /* resume signaling for 20 msec */
1953                                 priv->reset_done = jiffies
1954                                                 + msecs_to_jiffies(20);
1955                                 /* check the port again */
1956                                 mod_timer(&priv_to_hcd(priv)->rh_timer,
1957                                                 priv->reset_done);
1958                         }
1959
1960                         /* resume completed? */
1961                         else if (time_after_eq(jiffies,
1962                                         priv->reset_done)) {
1963                                 status |= 1 << USB_PORT_FEAT_C_SUSPEND;
1964                                 priv->reset_done = 0;
1965
1966                                 /* stop resume signaling */
1967                                 temp = isp1760_readl(status_reg);
1968                                 isp1760_writel(
1969                                         temp & ~(PORT_RWC_BITS | PORT_RESUME),
1970                                         status_reg);
1971                                 retval = handshake(priv, status_reg,
1972                                            PORT_RESUME, 0, 2000 /* 2msec */);
1973                                 if (retval != 0) {
1974                                         isp1760_err(priv,
1975                                                 "port %d resume error %d\n",
1976                                                 wIndex + 1, retval);
1977                                         goto error;
1978                                 }
1979                                 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
1980                         }
1981                 }
1982
1983                 /* whoever resets must GetPortStatus to complete it!! */
1984                 if ((temp & PORT_RESET)
1985                                 && time_after_eq(jiffies,
1986                                         priv->reset_done)) {
1987                         status |= 1 << USB_PORT_FEAT_C_RESET;
1988                         priv->reset_done = 0;
1989
1990                         /* force reset to complete */
1991                         isp1760_writel(temp & ~PORT_RESET,
1992                                         status_reg);
1993                         /* REVISIT:  some hardware needs 550+ usec to clear
1994                          * this bit; seems too long to spin routinely...
1995                          */
1996                         retval = handshake(priv, status_reg,
1997                                         PORT_RESET, 0, 750);
1998                         if (retval != 0) {
1999                                 isp1760_err(priv, "port %d reset error %d\n",
2000                                                 wIndex + 1, retval);
2001                                 goto error;
2002                         }
2003
2004                         /* see what we found out */
2005                         temp = check_reset_complete(priv, wIndex, status_reg,
2006                                         isp1760_readl(status_reg));
2007                 }
2008                 /*
2009                  * Even if OWNER is set, there's no harm letting khubd
2010                  * see the wPortStatus values (they should all be 0 except
2011                  * for PORT_POWER anyway).
2012                  */
2013
2014                 if (temp & PORT_OWNER)
2015                         printk(KERN_ERR "Warning: PORT_OWNER is set\n");
2016
2017                 if (temp & PORT_CONNECT) {
2018                         status |= 1 << USB_PORT_FEAT_CONNECTION;
2019                         /* status may be from integrated TT */
2020                         status |= ehci_port_speed(priv, temp);
2021                 }
2022                 if (temp & PORT_PE)
2023                         status |= 1 << USB_PORT_FEAT_ENABLE;
2024                 if (temp & (PORT_SUSPEND|PORT_RESUME))
2025                         status |= 1 << USB_PORT_FEAT_SUSPEND;
2026                 if (temp & PORT_RESET)
2027                         status |= 1 << USB_PORT_FEAT_RESET;
2028                 if (temp & PORT_POWER)
2029                         status |= 1 << USB_PORT_FEAT_POWER;
2030
2031                 put_unaligned(cpu_to_le32(status), (__le32 *) buf);
2032                 break;
2033         case SetHubFeature:
2034                 switch (wValue) {
2035                 case C_HUB_LOCAL_POWER:
2036                 case C_HUB_OVER_CURRENT:
2037                         /* no hub-wide feature/status flags */
2038                         break;
2039                 default:
2040                         goto error;
2041                 }
2042                 break;
2043         case SetPortFeature:
2044                 selector = wIndex >> 8;
2045                 wIndex &= 0xff;
2046                 if (!wIndex || wIndex > ports)
2047                         goto error;
2048                 wIndex--;
2049                 temp = isp1760_readl(status_reg);
2050                 if (temp & PORT_OWNER)
2051                         break;
2052
2053 /*              temp &= ~PORT_RWC_BITS; */
2054                 switch (wValue) {
2055                 case USB_PORT_FEAT_ENABLE:
2056                         isp1760_writel(temp | PORT_PE, status_reg);
2057                         break;
2058
2059                 case USB_PORT_FEAT_SUSPEND:
2060                         if ((temp & PORT_PE) == 0
2061                                         || (temp & PORT_RESET) != 0)
2062                                 goto error;
2063
2064                         isp1760_writel(temp | PORT_SUSPEND, status_reg);
2065                         break;
2066                 case USB_PORT_FEAT_POWER:
2067                         if (HCS_PPC(priv->hcs_params))
2068                                 isp1760_writel(temp | PORT_POWER,
2069                                                 status_reg);
2070                         break;
2071                 case USB_PORT_FEAT_RESET:
2072                         if (temp & PORT_RESUME)
2073                                 goto error;
2074                         /* line status bits may report this as low speed,
2075                          * which can be fine if this root hub has a
2076                          * transaction translator built in.
2077                          */
2078                         if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
2079                                         && PORT_USB11(temp)) {
2080                                 temp |= PORT_OWNER;
2081                         } else {
2082                                 temp |= PORT_RESET;
2083                                 temp &= ~PORT_PE;
2084
2085                                 /*
2086                                  * caller must wait, then call GetPortStatus
2087                                  * usb 2.0 spec says 50 ms resets on root
2088                                  */
2089                                 priv->reset_done = jiffies +
2090                                         msecs_to_jiffies(50);
2091                         }
2092                         isp1760_writel(temp, status_reg);
2093                         break;
2094                 default:
2095                         goto error;
2096                 }
2097                 isp1760_readl(hcd->regs + HC_USBCMD);
2098                 break;
2099
2100         default:
2101 error:
2102                 /* "stall" on error */
2103                 retval = -EPIPE;
2104         }
2105         spin_unlock_irqrestore(&priv->lock, flags);
2106         return retval;
2107 }
2108
2109 static void isp1760_endpoint_disable(struct usb_hcd *usb_hcd,
2110                 struct usb_host_endpoint *ep)
2111 {
2112         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
2113         struct isp1760_qh *qh;
2114         struct isp1760_qtd *qtd;
2115         unsigned long flags;
2116
2117         spin_lock_irqsave(&priv->lock, flags);
2118         qh = ep->hcpriv;
2119         if (!qh)
2120                 goto out;
2121
2122         ep->hcpriv = NULL;
2123         do {
2124                 /* more than entry might get removed */
2125                 if (list_empty(&qh->qtd_list))
2126                         break;
2127
2128                 qtd = list_first_entry(&qh->qtd_list, struct isp1760_qtd,
2129                                 qtd_list);
2130
2131                 if (qtd->status & URB_ENQUEUED) {
2132
2133                         spin_unlock_irqrestore(&priv->lock, flags);
2134                         isp1760_urb_dequeue(usb_hcd, qtd->urb, -ECONNRESET);
2135                         spin_lock_irqsave(&priv->lock, flags);
2136                 } else {
2137                         struct urb *urb;
2138
2139                         urb = qtd->urb;
2140                         clean_up_qtdlist(qtd);
2141                         isp1760_urb_done(priv, urb, -ECONNRESET);
2142                 }
2143         } while (1);
2144
2145         qh_destroy(qh);
2146         /* remove requests and leak them.
2147          * ATL are pretty fast done, INT could take a while...
2148          * The latter shoule be removed
2149          */
2150 out:
2151         spin_unlock_irqrestore(&priv->lock, flags);
2152 }
2153
2154 static int isp1760_get_frame(struct usb_hcd *hcd)
2155 {
2156         struct isp1760_hcd *priv = hcd_to_priv(hcd);
2157         u32 fr;
2158
2159         fr = isp1760_readl(hcd->regs + HC_FRINDEX);
2160         return (fr >> 3) % priv->periodic_size;
2161 }
2162
2163 static void isp1760_stop(struct usb_hcd *hcd)
2164 {
2165         struct isp1760_hcd *priv = hcd_to_priv(hcd);
2166         u32 temp;
2167
2168         isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1,
2169                         NULL, 0);
2170         mdelay(20);
2171
2172         spin_lock_irq(&priv->lock);
2173         ehci_reset(priv);
2174         /* Disable IRQ */
2175         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
2176         isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
2177         spin_unlock_irq(&priv->lock);
2178
2179         isp1760_writel(0, hcd->regs + HC_CONFIGFLAG);
2180 }
2181
2182 static void isp1760_shutdown(struct usb_hcd *hcd)
2183 {
2184         u32 command, temp;
2185
2186         isp1760_stop(hcd);
2187         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
2188         isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
2189
2190         command = isp1760_readl(hcd->regs + HC_USBCMD);
2191         command &= ~CMD_RUN;
2192         isp1760_writel(command, hcd->regs + HC_USBCMD);
2193 }
2194
2195 static const struct hc_driver isp1760_hc_driver = {
2196         .description            = "isp1760-hcd",
2197         .product_desc           = "NXP ISP1760 USB Host Controller",
2198         .hcd_priv_size          = sizeof(struct isp1760_hcd),
2199         .irq                    = isp1760_irq,
2200         .flags                  = HCD_MEMORY | HCD_USB2,
2201         .reset                  = isp1760_hc_setup,
2202         .start                  = isp1760_run,
2203         .stop                   = isp1760_stop,
2204         .shutdown               = isp1760_shutdown,
2205         .urb_enqueue            = isp1760_urb_enqueue,
2206         .urb_dequeue            = isp1760_urb_dequeue,
2207         .endpoint_disable       = isp1760_endpoint_disable,
2208         .get_frame_number       = isp1760_get_frame,
2209         .hub_status_data        = isp1760_hub_status_data,
2210         .hub_control            = isp1760_hub_control,
2211 };
2212
2213 int __init init_kmem_once(void)
2214 {
2215         qtd_cachep = kmem_cache_create("isp1760_qtd",
2216                         sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY |
2217                         SLAB_MEM_SPREAD, NULL);
2218
2219         if (!qtd_cachep)
2220                 return -ENOMEM;
2221
2222         qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh),
2223                         0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL);
2224
2225         if (!qh_cachep) {
2226                 kmem_cache_destroy(qtd_cachep);
2227                 return -ENOMEM;
2228         }
2229
2230         return 0;
2231 }
2232
2233 void deinit_kmem_cache(void)
2234 {
2235         kmem_cache_destroy(qtd_cachep);
2236         kmem_cache_destroy(qh_cachep);
2237 }
2238
2239 struct usb_hcd *isp1760_register(u64 res_start, u64 res_len, int irq,
2240                 u64 irqflags, struct device *dev, const char *busname,
2241                 unsigned int devflags)
2242 {
2243         struct usb_hcd *hcd;
2244         struct isp1760_hcd *priv;
2245         int ret;
2246
2247         if (usb_disabled())
2248                 return ERR_PTR(-ENODEV);
2249
2250         /* prevent usb-core allocating DMA pages */
2251         dev->dma_mask = NULL;
2252
2253         hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev));
2254         if (!hcd)
2255                 return ERR_PTR(-ENOMEM);
2256
2257         priv = hcd_to_priv(hcd);
2258         priv->devflags = devflags;
2259         init_memory(priv);
2260         hcd->regs = ioremap(res_start, res_len);
2261         if (!hcd->regs) {
2262                 ret = -EIO;
2263                 goto err_put;
2264         }
2265
2266         hcd->irq = irq;
2267         hcd->rsrc_start = res_start;
2268         hcd->rsrc_len = res_len;
2269
2270         ret = usb_add_hcd(hcd, irq, irqflags);
2271         if (ret)
2272                 goto err_unmap;
2273
2274         return hcd;
2275
2276 err_unmap:
2277          iounmap(hcd->regs);
2278
2279 err_put:
2280          usb_put_hcd(hcd);
2281
2282          return ERR_PTR(ret);
2283 }
2284
2285 MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
2286 MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
2287 MODULE_LICENSE("GPL v2");