target/linux/adm5120-2.6/files/drivers/usb/host/adm5120-hcd.c

   1 /*
   2  *      HCD driver for ADM5120 SoC
   3  *
   4  *      Copyright (C) 2005 Jeroen Vreeken (pe1rxq@amsat.org)
   5  *
   6  *      Based on the ADMtek 2.4 driver
   7  *      (C) Copyright 2003 Junius Chen <juniusc@admtek.com.tw>
   8  *      Which again was based on the ohci and uhci drivers.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/delay.h>
  13 #include <linux/debugfs.h>
  14 #include <linux/seq_file.h>
  15 #include <linux/errno.h>
  16 #include <linux/init.h>
  17 #include <linux/list.h>
  18 #include <linux/usb.h>
  19 #include <linux/platform_device.h>
  20
  21 #include <asm/io.h>
  22 #include <asm/irq.h>
  23 #include <asm/system.h>
  24 #include <asm/byteorder.h>
  25 #include <asm/mach-adm5120/adm5120_info.h>
  26
  27 #include "../core/hcd.h"
  28
  29 MODULE_DESCRIPTION("ADM5120 USB Host Controller Driver");
  30 MODULE_LICENSE("GPL");
  31 MODULE_AUTHOR("Jeroen Vreeken (pe1rxq@amsat.org)");
  32
  33 #define PFX     "adm5120-hcd: "
  34
  35 #define ADMHCD_REG_CONTROL              0x00
  36 #define ADMHCD_REG_INTSTATUS            0x04
  37 #define ADMHCD_REG_INTENABLE            0x08
  38 #define ADMHCD_REG_HOSTCONTROL          0x10
  39 #define ADMHCD_REG_FMINTERVAL           0x18
  40 #define ADMHCD_REG_FMNUMBER             0x1c
  41 #define ADMHCD_REG_LSTHRESH             0x70
  42 #define ADMHCD_REG_RHDESCR              0x74
  43 #define ADMHCD_REG_PORTSTATUS0          0x78
  44 #define ADMHCD_REG_PORTSTATUS1          0x7c
  45 #define ADMHCD_REG_HOSTHEAD             0x80
  46
  47
  48 #define ADMHCD_NUMPORTS         2
  49
  50 #define ADMHCD_HOST_EN          0x00000001      /* Host enable */
  51 #define ADMHCD_SW_INTREQ        0x00000002      /* request software int */
  52 #define ADMHCD_SW_RESET         0x00000008      /* Reset */
  53
  54 #define ADMHCD_INT_TD           0x00100000      /* TD completed */
  55 #define ADMHCD_INT_SW           0x20000000      /* software interrupt */
  56 #define ADMHCD_INT_FATAL        0x40000000      /* Fatal interrupt */
  57 #define ADMHCD_INT_ACT          0x80000000      /* Interrupt active */
  58
  59 #define ADMHCD_STATE_RST        0x00000000      /* bus state reset */
  60 #define ADMHCD_STATE_RES        0x00000001      /* bus state resume */
  61 #define ADMHCD_STATE_OP         0x00000002      /* bus state operational */
  62 #define ADMHCD_STATE_SUS        0x00000003      /* bus state suspended */
  63 #define ADMHCD_DMA_EN           0x00000004      /* enable dma engine */
  64
  65 #define ADMHCD_NPS              0x00000020      /* No Power Switch */
  66 #define ADMHCD_LPSC             0x04000000      /* Local power switch change */
  67
  68 #define ADMHCD_CCS              0x00000001      /* current connect status */
  69 #define ADMHCD_PES              0x00000002      /* port enable status */
  70 #define ADMHCD_PSS              0x00000004      /* port suspend status */
  71 #define ADMHCD_POCI             0x00000008      /* port overcurrent indicator */
  72 #define ADMHCD_PRS              0x00000010      /* port reset status */
  73 #define ADMHCD_PPS              0x00000100      /* port power status */
  74 #define ADMHCD_LSDA             0x00000200      /* low speed device attached */
  75 #define ADMHCD_CSC              0x00010000      /* connect status change */
  76 #define ADMHCD_PESC             0x00020000      /* enable status change */
  77 #define ADMHCD_PSSC             0x00040000      /* suspend status change */
  78 #define ADMHCD_OCIC             0x00080000      /* overcurrent change*/
  79 #define ADMHCD_PRSC             0x00100000      /* reset status change */
  80
  81
  82 struct admhcd_ed {
  83         /* Don't change first four, they used for DMA */
  84         u32                             control;
  85         struct admhcd_td                *tail;
  86         struct admhcd_td                *head;
  87         struct admhcd_ed                *next;
  88         /* the rest is for the driver only: */
  89         struct admhcd_td                *cur;
  90         struct usb_host_endpoint        *ep;
  91         struct urb                      *urb;
  92         struct admhcd_ed                *real;
  93 } __attribute__ ((packed));
  94
  95 #define ADMHCD_ED_EPSHIFT       7               /* Shift for endpoint number */
  96 #define ADMHCD_ED_INT           0x00000800      /* Is this an int endpoint */
  97 #define ADMHCD_ED_SPEED         0x00002000      /* Is it a high speed dev? */
  98 #define ADMHCD_ED_SKIP          0x00004000      /* Skip this ED */
  99 #define ADMHCD_ED_FORMAT        0x00008000      /* Is this an isoc endpoint */
 100 #define ADMHCD_ED_MAXSHIFT      16              /* Shift for max packet size */
 101
 102 struct admhcd_td {
 103         /* Don't change first four, they are used for DMA */
 104         u32                     control;
 105         u32                     buffer;
 106         u32                     buflen;
 107         struct admhcd_td        *next;
 108         /* the rest is for the driver only: */
 109         struct urb              *urb;
 110         struct admhcd_td        *real;
 111 } __attribute__ ((packed));
 112
 113 #define ADMHCD_TD_OWN           0x80000000
 114 #define ADMHCD_TD_TOGGLE        0x00000000
 115 #define ADMHCD_TD_DATA0         0x01000000
 116 #define ADMHCD_TD_DATA1         0x01800000
 117 #define ADMHCD_TD_OUT           0x00200000
 118 #define ADMHCD_TD_IN            0x00400000
 119 #define ADMHCD_TD_SETUP         0x00000000
 120 #define ADMHCD_TD_ISO           0x00010000
 121 #define ADMHCD_TD_R             0x00040000
 122 #define ADMHCD_TD_INTEN         0x00010000
 123
 124 static int admhcd_td_err[16] = {
 125         0,              /* No */
 126         -EREMOTEIO,             /* CRC */
 127         -EREMOTEIO,     /* bit stuff */
 128         -EREMOTEIO,             /* data toggle */
 129         -EPIPE,         /* stall */
 130         -ETIMEDOUT,     /* timeout */
 131         -EPROTO,        /* pid err */
 132         -EPROTO,        /* unexpected pid */
 133         -EREMOTEIO,     /* data overrun */
 134         -EREMOTEIO,     /* data underrun */
 135         -ETIMEDOUT,     /* 1010 */
 136         -ETIMEDOUT,     /* 1011 */
 137         -EREMOTEIO,     /* buffer overrun */
 138         -EREMOTEIO,     /* buffer underrun */
 139         -ETIMEDOUT,     /* 1110 */
 140         -ETIMEDOUT,     /* 1111 */
 141 };
 142
 143 #define ADMHCD_TD_ERRMASK       0x38000000
 144 #define ADMHCD_TD_ERRSHIFT      27
 145
 146 #define TD(td)  ((struct admhcd_td *)(((u32)(td)) & ~0xf))
 147 #define ED(ed)  ((struct admhcd_ed *)(((u32)(ed)) & ~0xf))
 148
 149 struct admhcd {
 150         spinlock_t      lock;
 151
 152         void __iomem *addr_reg;
 153         void __iomem *data_reg;
 154         /* Root hub registers */
 155         u32 rhdesca;
 156         u32 rhdescb;
 157         u32 rhstatus;
 158         u32 rhport[2];
 159
 160         /* async schedule: control, bulk */
 161         struct list_head async;
 162         u32             base;
 163         u32             dma_en;
 164         unsigned long   flags;
 165
 166 };
 167
 168 static inline struct admhcd *hcd_to_admhcd(struct usb_hcd *hcd)
 169 {
 170         return (struct admhcd *)(hcd->hcd_priv);
 171 }
 172
 173 static inline struct usb_hcd *admhcd_to_hcd(struct admhcd *admhcd)
 174 {
 175         return container_of((void *)admhcd, struct usb_hcd, hcd_priv);
 176 }
 177
 178 static char hcd_name[] = "adm5120-hcd";
 179
 180 static u32 admhcd_reg_get(struct admhcd *ahcd, int reg)
 181 {
 182         return *(volatile u32 *)KSEG1ADDR(ahcd->base+reg);
 183 }
 184
 185 static void admhcd_reg_set(struct admhcd *ahcd, int reg, u32 val)
 186 {
 187         *(volatile u32 *)KSEG1ADDR(ahcd->base+reg) = val;
 188 }
 189
 190 static void admhcd_lock(struct admhcd *ahcd)
 191 {
 192         spin_lock_irqsave(&ahcd->lock, ahcd->flags);
 193         ahcd->dma_en = admhcd_reg_get(ahcd, ADMHCD_REG_HOSTCONTROL) &
 194             ADMHCD_DMA_EN;
 195         admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL, ADMHCD_STATE_OP);
 196 }
 197
 198 static void admhcd_unlock(struct admhcd *ahcd)
 199 {
 200         admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL,
 201             ADMHCD_STATE_OP | ahcd->dma_en);
 202         spin_unlock_irqrestore(&ahcd->lock, ahcd->flags);
 203 }
 204
 205 static struct admhcd_td *admhcd_td_alloc(struct admhcd_ed *ed, struct urb *urb)
 206 {
 207         struct admhcd_td *tdn, *td;
 208
 209         tdn = kmalloc(sizeof(struct admhcd_td), GFP_ATOMIC);
 210         if (!tdn)
 211                 return NULL;
 212         tdn->real = tdn;
 213         tdn = (struct admhcd_td *)KSEG1ADDR(tdn);
 214         memset(tdn, 0, sizeof(struct admhcd_td));
 215         if (ed->cur == NULL) {
 216                 ed->cur = tdn;
 217                 ed->head = tdn;
 218                 ed->tail = tdn;
 219                 td = tdn;
 220         } else {
 221                 /* Supply back the old tail and link in new td as tail */
 222                 td = TD(ed->tail);
 223                 TD(ed->tail)->next = tdn;
 224                 ed->tail = tdn;
 225         }
 226         td->urb = urb;
 227
 228         return td;
 229 }
 230
 231 static void admhcd_td_free(struct admhcd_ed *ed, struct urb *urb)
 232 {
 233         struct admhcd_td *td, **tdp;
 234
 235         if (urb == NULL)
 236                 ed->control |= ADMHCD_ED_SKIP;
 237         tdp = &ed->cur;
 238         td = ed->cur;
 239         do {
 240                 if (td->urb == urb)
 241                         break;
 242                 tdp = &td->next;
 243                 td = TD(td->next);
 244         } while (td);
 245         while (td && td->urb == urb) {
 246                 *tdp = TD(td->next);
 247                 kfree(td->real);
 248                 td = *tdp;
 249         }
 250 }
 251
 252 /* Find an endpoint's descriptor, if needed allocate a new one and link it
 253    in the DMA chain
 254  */
 255 static struct admhcd_ed *admhcd_get_ed(struct admhcd *ahcd,
 256     struct usb_host_endpoint *ep, struct urb *urb)
 257 {
 258         struct admhcd_ed *hosthead;
 259         struct admhcd_ed *found = NULL, *ed = NULL;
 260         unsigned int pipe = urb->pipe;
 261
 262         admhcd_lock(ahcd);
 263         hosthead = (struct admhcd_ed *)admhcd_reg_get(ahcd, ADMHCD_REG_HOSTHEAD);
 264         if (hosthead) {
 265                 for (ed = hosthead;; ed = ED(ed->next)) {
 266                         if (ed->ep == ep) {
 267                                 found = ed;
 268                                 break;
 269                         }
 270                         if (ED(ed->next) == hosthead)
 271                                 break;
 272                 }
 273         }
 274         if (!found) {
 275                 found = kmalloc(sizeof(struct admhcd_ed), GFP_ATOMIC);
 276                 if (!found)
 277                         goto out;
 278                 memset(found, 0, sizeof(struct admhcd_ed));
 279                 found->real = found;
 280                 found->ep = ep;
 281                 found = (struct admhcd_ed *)KSEG1ADDR(found);
 282                 found->control = usb_pipedevice(pipe) |
 283                     (usb_pipeendpoint(pipe) << ADMHCD_ED_EPSHIFT) |
 284                     (usb_pipeint(pipe) ? ADMHCD_ED_INT : 0) |
 285                     (urb->dev->speed == USB_SPEED_FULL ? ADMHCD_ED_SPEED : 0) |
 286                     (usb_pipeisoc(pipe) ? ADMHCD_ED_FORMAT : 0) |
 287                     (usb_maxpacket(urb->dev, pipe, usb_pipeout(pipe)) << ADMHCD_ED_MAXSHIFT);
 288                 /* Alloc first dummy td */
 289                 admhcd_td_alloc(found, NULL);
 290                 if (hosthead) {
 291                         found->next = hosthead;
 292                         ed->next = found;
 293                 } else {
 294                         found->next = found;
 295                         admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, (u32)found);
 296                 }
 297         }
 298 out:
 299         admhcd_unlock(ahcd);
 300         return found;
 301 }
 302
 303 static struct admhcd_td *admhcd_td_fill(u32 control, struct admhcd_td *td,
 304     dma_addr_t data, int len)
 305 {
 306         td->buffer = data;
 307         td->buflen = len;
 308         td->control = control;
 309         return TD(td->next);
 310 }
 311
 312 static void admhcd_ed_start(struct admhcd *ahcd, struct admhcd_ed *ed)
 313 {
 314         struct admhcd_td *td = ed->cur;
 315
 316         if (ed->urb)
 317                 return;
 318         if (td->urb) {
 319                 ed->urb = td->urb;
 320                 while (1) {
 321                         td->control |= ADMHCD_TD_OWN;
 322                         if (TD(td->next)->urb != td->urb) {
 323                                 td->buflen |= ADMHCD_TD_INTEN;
 324                                 break;
 325                         }
 326                         td = TD(td->next);
 327                 }
 328         }
 329         ed->head = TD(ed->head);
 330         ahcd->dma_en |= ADMHCD_DMA_EN;
 331 }
 332
 333 static irqreturn_t adm5120hcd_irq(struct usb_hcd *hcd)
 334 {
 335         struct admhcd *ahcd = hcd_to_admhcd(hcd);
 336         u32 intstatus;
 337
 338         intstatus = admhcd_reg_get(ahcd, ADMHCD_REG_INTSTATUS);
 339         if (intstatus & ADMHCD_INT_FATAL) {
 340                 admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_FATAL);
 341                 //
 342         }
 343         if (intstatus & ADMHCD_INT_SW) {
 344                 admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_SW);
 345                 //
 346         }
 347         if (intstatus & ADMHCD_INT_TD) {
 348                 struct admhcd_ed *ed, *head;
 349
 350                 admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_TD);
 351
 352                 head = (struct admhcd_ed *)admhcd_reg_get(ahcd, ADMHCD_REG_HOSTHEAD);
 353                 ed = head;
 354                 if (ed) do {
 355                         /* Is it a finished TD? */
 356                         if (ed->urb && !(ed->cur->control & ADMHCD_TD_OWN)) {
 357                                 struct admhcd_td *td;
 358                                 int error;
 359
 360                                 td = ed->cur;
 361                                 error = (td->control & ADMHCD_TD_ERRMASK) >>
 362                                     ADMHCD_TD_ERRSHIFT;
 363                                 ed->urb->status = admhcd_td_err[error];
 364                                 admhcd_td_free(ed, ed->urb);
 365                                 // Calculate real length!!!
 366                                 ed->urb->actual_length = ed->urb->transfer_buffer_length;
 367                                 ed->urb->hcpriv = NULL;
 368                                 usb_hcd_giveback_urb(hcd, ed->urb);
 369                                 ed->urb = NULL;
 370                         }
 371                         admhcd_ed_start(ahcd, ed);
 372                         ed = ED(ed->next);
 373                 } while (ed != head);
 374         }
 375
 376         return IRQ_HANDLED;
 377 }
 378
 379 static int admhcd_urb_enqueue(struct usb_hcd *hcd, struct usb_host_endpoint *ep,
 380     struct urb *urb, gfp_t mem_flags)
 381 {
 382         struct admhcd *ahcd = hcd_to_admhcd(hcd);
 383         struct admhcd_ed *ed;
 384         struct admhcd_td *td;
 385         int size = 0, i, zero = 0, ret = 0;
 386         unsigned int pipe = urb->pipe, toggle = 0;
 387         dma_addr_t data = (dma_addr_t)urb->transfer_buffer;
 388         int data_len = urb->transfer_buffer_length;
 389
 390         ed = admhcd_get_ed(ahcd, ep, urb);
 391         if (!ed)
 392                 return -ENOMEM;
 393
 394         switch(usb_pipetype(pipe)) {
 395                 case PIPE_CONTROL:
 396                         size = 2;
 397                 case PIPE_INTERRUPT:
 398                 case PIPE_BULK:
 399                 default:
 400                         size += urb->transfer_buffer_length / 4096;
 401                         if (urb->transfer_buffer_length % 4096)
 402                                 size++;
 403                         if (size == 0)
 404                                 size++;
 405                         else if (urb->transfer_flags & URB_ZERO_PACKET &&
 406                             !(urb->transfer_buffer_length %
 407                               usb_maxpacket(urb->dev, pipe, usb_pipeout(pipe)))) {
 408                                 size++;
 409                                 zero = 1;
 410                         }
 411                         break;
 412                 case PIPE_ISOCHRONOUS:
 413                         size = urb->number_of_packets;
 414                         break;
 415         }
 416
 417         admhcd_lock(ahcd);
 418         /* Remember the first td */
 419         td = admhcd_td_alloc(ed, urb);
 420         if (!td) {
 421                 ret = -ENOMEM;
 422                 goto out;
 423         }
 424         /* Allocate additionall tds first */
 425         for (i = 1; i < size; i++) {
 426                 if (admhcd_td_alloc(ed, urb) == NULL) {
 427                         admhcd_td_free(ed, urb);
 428                         ret = -ENOMEM;
 429                         goto out;
 430                 }
 431         }
 432
 433         if (usb_gettoggle(urb->dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)))
 434                 toggle = ADMHCD_TD_TOGGLE;
 435         else {
 436                 toggle = ADMHCD_TD_DATA0;
 437                 usb_settoggle(urb->dev, usb_pipeendpoint(pipe),
 438                     usb_pipeout(pipe), 1);
 439         }
 440
 441         switch(usb_pipetype(pipe)) {
 442                 case PIPE_CONTROL:
 443                         td = admhcd_td_fill(ADMHCD_TD_SETUP | ADMHCD_TD_DATA0,
 444                             td, (dma_addr_t)urb->setup_packet, 8);
 445                         while (data_len > 0) {
 446                                 td = admhcd_td_fill(ADMHCD_TD_DATA1
 447                                     | ADMHCD_TD_R |
 448                                     (usb_pipeout(pipe) ?
 449                                     ADMHCD_TD_OUT : ADMHCD_TD_IN), td,
 450                                     data, data_len % 4097);
 451                                 data_len -= 4096;
 452                         }
 453                         admhcd_td_fill(ADMHCD_TD_DATA1 | (usb_pipeout(pipe) ?
 454                             ADMHCD_TD_IN : ADMHCD_TD_OUT), td,
 455                             data, 0);
 456                         break;
 457                 case PIPE_INTERRUPT:
 458                 case PIPE_BULK:
 459                         //info ok for interrupt?
 460                         i = 0;
 461                         while(data_len > 4096) {
 462                                 td = admhcd_td_fill((usb_pipeout(pipe) ?
 463                                     ADMHCD_TD_OUT :
 464                                     ADMHCD_TD_IN | ADMHCD_TD_R) |
 465                                     (i ? ADMHCD_TD_TOGGLE : toggle), td,
 466                                     data, 4096);
 467                                 data += 4096;
 468                                 data_len -= 4096;
 469                                 i++;
 470                         }
 471                         td = admhcd_td_fill((usb_pipeout(pipe) ?
 472                             ADMHCD_TD_OUT : ADMHCD_TD_IN) |
 473                             (i ? ADMHCD_TD_TOGGLE : toggle), td, data, data_len);
 474                         i++;
 475                         if (zero)
 476                                 admhcd_td_fill((usb_pipeout(pipe) ?
 477                                     ADMHCD_TD_OUT : ADMHCD_TD_IN) |
 478                                     (i ? ADMHCD_TD_TOGGLE : toggle), td, 0, 0);
 479                         break;
 480                 case PIPE_ISOCHRONOUS:
 481                         for (i = 0; i < urb->number_of_packets; i++) {
 482                                 td = admhcd_td_fill(ADMHCD_TD_ISO |
 483                                     ((urb->start_frame + i) & 0xffff), td,
 484                                     data + urb->iso_frame_desc[i].offset,
 485                                     urb->iso_frame_desc[i].length);
 486                         }
 487                         break;
 488         }
 489         urb->hcpriv = ed;
 490         admhcd_ed_start(ahcd, ed);
 491 out:
 492         admhcd_unlock(ahcd);
 493         return ret;
 494 }
 495
 496 static int admhcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
 497 {
 498         struct admhcd *ahcd = hcd_to_admhcd(hcd);
 499         struct admhcd_ed *ed;
 500
 501         admhcd_lock(ahcd);
 502
 503         ed = urb->hcpriv;
 504         if (ed && ed->urb != urb)
 505                 admhcd_td_free(ed, urb);
 506
 507         admhcd_unlock(ahcd);
 508         return 0;
 509 }
 510
 511 static void admhcd_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
 512 {
 513         struct admhcd *ahcd = hcd_to_admhcd(hcd);
 514         struct admhcd_ed *ed, *edt, *head;
 515
 516         admhcd_lock(ahcd);
 517
 518         head = (struct admhcd_ed *)admhcd_reg_get(ahcd, ADMHCD_REG_HOSTHEAD);
 519         if (!head)
 520                 goto out;
 521         for (ed = head; ED(ed->next) != head; ed = ED(ed->next))
 522                 if (ed->ep == ep)
 523                         break;
 524         if (ed->ep != ep)
 525                 goto out;
 526         while (ed->cur)
 527                 admhcd_td_free(ed, ed->cur->urb);
 528         if (head == ed) {
 529                 if (ED(ed->next) == ed) {
 530                         admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, 0);
 531                         ahcd->dma_en = 0;
 532                         goto out_free;
 533                 }
 534                 head = ED(ed->next);
 535                 for (edt = head; ED(edt->next) != head; edt = ED(edt->next));
 536                 edt->next = ED(ed->next);
 537                 admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, (u32)ed->next);
 538                 goto out_free;
 539         }
 540         for (edt = head; edt->next != ed; edt = edt->next);
 541         edt->next = ed->next;
 542 out_free:
 543         kfree(ed->real);
 544 out:
 545         admhcd_unlock(ahcd);
 546 }
 547
 548 static int admhcd_get_frame_number(struct usb_hcd *hcd)
 549 {
 550         struct admhcd *ahcd = hcd_to_admhcd(hcd);
 551
 552         return admhcd_reg_get(ahcd, ADMHCD_REG_FMNUMBER) & 0x0000ffff;
 553 }
 554
 555 static int admhcd_hub_status_data(struct usb_hcd *hcd, char *buf)
 556 {
 557         struct admhcd *ahcd = hcd_to_admhcd(hcd);
 558         int port;
 559
 560         *buf = 0;
 561         for (port = 0; port < ADMHCD_NUMPORTS; port++) {
 562                 if (admhcd_reg_get(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4) &
 563                     (ADMHCD_CSC | ADMHCD_PESC | ADMHCD_PSSC | ADMHCD_OCIC |
 564                      ADMHCD_PRSC))
 565                         *buf |= (1 << (port + 1));
 566         }
 567         return !!*buf;
 568 }
 569
 570 static __u8 root_hub_hub_des[] = {
 571         0x09,           /* __u8  bLength; */
 572         0x29,           /* __u8  bDescriptorType; Hub-descriptor */
 573         0x02,           /* __u8  bNbrPorts; */
 574         0x0a, 0x00,     /* __u16 wHubCharacteristics; */
 575         0x01,           /* __u8  bPwrOn2pwrGood; 2ms */
 576         0x00,           /* __u8  bHubContrCurrent; 0mA */
 577         0x00,           /* __u8  DeviceRemovable; */
 578         0xff,           /* __u8  PortPwrCtrlMask; */
 579 };
 580
 581 static int admhcd_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 582     u16 wIndex, char *buf, u16 wLength)
 583 {
 584         struct admhcd *ahcd = hcd_to_admhcd(hcd);
 585         int retval = 0, len;
 586         unsigned int port = wIndex -1;
 587
 588         switch (typeReq) {
 589
 590         case GetHubStatus:
 591                 *(__le32 *)buf = cpu_to_le32(0);
 592                 break;
 593         case GetPortStatus:
 594                 if (port >= ADMHCD_NUMPORTS)
 595                         goto err;
 596                 *(__le32 *)buf = cpu_to_le32(
 597                     admhcd_reg_get(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4));
 598                 break;
 599         case SetHubFeature:             /* We don't implement these */
 600         case ClearHubFeature:
 601                 switch (wValue) {
 602                 case C_HUB_OVER_CURRENT:
 603                 case C_HUB_LOCAL_POWER:
 604                         break;
 605                 default:
 606                         goto err;
 607                 }
 608         case SetPortFeature:
 609                 if (port >= ADMHCD_NUMPORTS)
 610                         goto err;
 611
 612                 switch (wValue) {
 613                 case USB_PORT_FEAT_SUSPEND:
 614                         admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
 615                             ADMHCD_PSS);
 616                         break;
 617                 case USB_PORT_FEAT_RESET:
 618                         if (admhcd_reg_get(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4)
 619                             & ADMHCD_CCS) {
 620                                 admhcd_reg_set(ahcd,
 621                                     ADMHCD_REG_PORTSTATUS0 + port*4,
 622                                     ADMHCD_PRS | ADMHCD_CSC);
 623                                 mdelay(50);
 624                                 admhcd_reg_set(ahcd,
 625                                     ADMHCD_REG_PORTSTATUS0 + port*4,
 626                                     ADMHCD_PES | ADMHCD_CSC);
 627                         }
 628                         break;
 629                 case USB_PORT_FEAT_POWER:
 630                         admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
 631                             ADMHCD_PPS);
 632                         break;
 633                 default:
 634                         goto err;
 635                 }
 636                 break;
 637         case ClearPortFeature:
 638                 if (port >= ADMHCD_NUMPORTS)
 639                         goto err;
 640
 641                 switch (wValue) {
 642                 case USB_PORT_FEAT_ENABLE:
 643                         admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
 644                             ADMHCD_CCS);
 645                         break;
 646                 case USB_PORT_FEAT_C_ENABLE:
 647                         admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
 648                             ADMHCD_PESC);
 649                         break;
 650                 case USB_PORT_FEAT_SUSPEND:
 651                         admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
 652                             ADMHCD_POCI);
 653                         break;
 654                 case USB_PORT_FEAT_C_SUSPEND:
 655                         admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
 656                             ADMHCD_PSSC);
 657                 case USB_PORT_FEAT_POWER:
 658                         admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
 659                             ADMHCD_LSDA);
 660                         break;
 661                 case USB_PORT_FEAT_C_CONNECTION:
 662                         admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
 663                             ADMHCD_CSC);
 664                         break;
 665                 case USB_PORT_FEAT_C_OVER_CURRENT:
 666                         admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
 667                             ADMHCD_OCIC);
 668                         break;
 669                 case USB_PORT_FEAT_C_RESET:
 670                         admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
 671                             ADMHCD_PRSC);
 672                         break;
 673                 default:
 674                         goto err;
 675                 }
 676                 break;
 677         case GetHubDescriptor:
 678                 len = min_t(unsigned int, sizeof(root_hub_hub_des), wLength);
 679                 memcpy(buf, root_hub_hub_des, len);
 680                 break;
 681         default:
 682 err:
 683                 retval = -EPIPE;
 684         }
 685
 686         return retval;
 687 }
 688
 689 static struct hc_driver adm5120_hc_driver = {
 690         .description =          hcd_name,
 691         .product_desc =         "ADM5120 HCD",
 692         .hcd_priv_size =        sizeof(struct admhcd),
 693         .irq =                  adm5120hcd_irq,
 694         .flags =                HCD_USB11,
 695         .urb_enqueue =          admhcd_urb_enqueue,
 696         .urb_dequeue =          admhcd_urb_dequeue,
 697         .endpoint_disable =     admhcd_endpoint_disable,
 698         .get_frame_number =     admhcd_get_frame_number,
 699         .hub_status_data =      admhcd_hub_status_data,
 700         .hub_control =          admhcd_hub_control,
 701 };
 702
 703 #define resource_len(r) (((r)->end - (r)->start) + 1)
 704
 705 static int __init adm5120hcd_probe(struct platform_device *pdev)
 706 {
 707         struct usb_hcd *hcd;
 708         struct admhcd *ahcd;
 709         struct resource *addr, *data;
 710         void __iomem *addr_reg;
 711         void __iomem *data_reg;
 712
 713         int err = 0, irq;
 714
 715         if (pdev->num_resources < 3) {
 716                 err = -ENODEV;
 717                 goto out;
 718         }
 719
 720         if (pdev->dev.dma_mask) {
 721                 printk(KERN_DEBUG "no we won't dma\n");
 722                 return -EINVAL;
 723         }
 724
 725         irq = platform_get_irq(pdev, 0);
 726         data = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 727         addr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 728
 729         if (!addr || !data || irq < 0) {
 730                 err = -ENODEV;
 731                 goto out;
 732         }
 733
 734         if (!request_mem_region(addr->start, 2, hcd_name)) {
 735                 err = -EBUSY;
 736                 goto out;
 737         }
 738
 739         addr_reg = ioremap(addr->start, resource_len(addr));
 740         if (addr_reg == NULL) {
 741                 err = -ENOMEM;
 742                 goto out_mem;
 743         }
 744         if (!request_mem_region(data->start, 2, hcd_name)) {
 745                 err = -EBUSY;
 746                 goto out_unmap;
 747         }
 748
 749         data_reg = ioremap(data->start, resource_len(data));
 750         if (data_reg == NULL) {
 751                 err = -ENOMEM;
 752                 goto out_mem;
 753         }
 754
 755         hcd = usb_create_hcd(&adm5120_hc_driver, &pdev->dev, pdev->dev.bus_id);
 756         if (!hcd)
 757                 goto out_mem;
 758
 759         hcd->rsrc_start = addr->start;
 760         ahcd = hcd_to_admhcd(hcd);
 761
 762         spin_lock_init(&ahcd->lock);
 763         INIT_LIST_HEAD(&ahcd->async);
 764
 765         ahcd->data_reg = data_reg;
 766         ahcd->addr_reg = addr_reg;
 767
 768         hcd->product_desc = "ADM5120 HCD";
 769
 770         /* Initialise the HCD registers */
 771         admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0);
 772         mdelay(10);
 773
 774         admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_SW_RESET);
 775
 776         while (admhcd_reg_get(ahcd, ADMHCD_REG_CONTROL) & ADMHCD_SW_RESET)
 777                 mdelay(1);
 778
 779         admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_HOST_EN);
 780         admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, 0x00000000);
 781         admhcd_reg_set(ahcd, ADMHCD_REG_FMINTERVAL, 0x20002edf);
 782         admhcd_reg_set(ahcd, ADMHCD_REG_LSTHRESH, 0x628);
 783         admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE,
 784             ADMHCD_INT_ACT | ADMHCD_INT_FATAL | ADMHCD_INT_SW | ADMHCD_INT_TD);
 785         admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS,
 786             ADMHCD_INT_ACT | ADMHCD_INT_FATAL | ADMHCD_INT_SW | ADMHCD_INT_TD);
 787         admhcd_reg_set(ahcd, ADMHCD_REG_RHDESCR, ADMHCD_NPS | ADMHCD_LPSC);
 788         admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL, ADMHCD_STATE_OP);
 789
 790         err = usb_add_hcd(hcd, irq, IRQF_DISABLED);
 791         if (err)
 792                 goto out_dev;
 793
 794         return 0;
 795
 796 out_dev:
 797         usb_put_hcd(hcd);
 798 out_unmap:
 799         iounmap(addr_reg);
 800 out_mem:
 801         release_mem_region(pdev->resource[0].start, pdev->resource[0].end - pdev->resource[0].start);
 802 out:
 803         return err;
 804 }
 805
 806 static int __init_or_module adm5120hcd_remove(struct platform_device *pdev)
 807 {
 808         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 809         struct admhcd *ahcd;
 810
 811         if (!hcd)
 812                 return 0;
 813         ahcd = hcd_to_admhcd(hcd);
 814         usb_remove_hcd(hcd);
 815
 816         usb_put_hcd(hcd);
 817         return 0;
 818 }
 819
 820 static struct platform_driver adm5120hcd_driver = {
 821         .probe =        adm5120hcd_probe,
 822         .remove =       adm5120hcd_remove,
 823         .driver =       {
 824                 .name   = "adm5120-hcd",
 825                 .owner  = THIS_MODULE,
 826         },
 827 };
 828
 829 static int __init adm5120hcd_init(void)
 830 {
 831         if (usb_disabled())
 832                 return -ENODEV;
 833         if (!adm5120_board.has_usb) {
 834                 printk(KERN_DEBUG PFX "this board does not have USB\n");
 835                 return -ENODEV;
 836         }
 837
 838         printk(KERN_INFO PFX "registered\n");
 839         return platform_driver_register(&adm5120hcd_driver);
 840 }
 841
 842 static void __exit adm5120hcd_exit(void)
 843 {
 844         platform_driver_unregister(&adm5120hcd_driver);
 845 }
 846
 847 module_init(adm5120hcd_init);
 848 module_exit(adm5120hcd_exit);