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