drivers/memstick/host/jmb38x_ms.c

   1 /*
   2  *  jmb38x_ms.c - JMicron jmb38x MemoryStick card reader
   3  *
   4  *  Copyright (C) 2008 Alex Dubov <oakad@yahoo.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  */
  11
  12 #include <linux/spinlock.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/pci.h>
  15 #include <linux/dma-mapping.h>
  16 #include <linux/delay.h>
  17 #include <linux/highmem.h>
  18 #include <linux/memstick.h>
  19
  20 #define DRIVER_NAME "jmb38x_ms"
  21
  22 static int no_dma;
  23 module_param(no_dma, bool, 0644);
  24
  25 enum {
  26         DMA_ADDRESS       = 0x00,
  27         BLOCK             = 0x04,
  28         DMA_CONTROL       = 0x08,
  29         TPC_P0            = 0x0c,
  30         TPC_P1            = 0x10,
  31         TPC               = 0x14,
  32         HOST_CONTROL      = 0x18,
  33         DATA              = 0x1c,
  34         STATUS            = 0x20,
  35         INT_STATUS        = 0x24,
  36         INT_STATUS_ENABLE = 0x28,
  37         INT_SIGNAL_ENABLE = 0x2c,
  38         TIMER             = 0x30,
  39         TIMER_CONTROL     = 0x34,
  40         PAD_OUTPUT_ENABLE = 0x38,
  41         PAD_PU_PD         = 0x3c,
  42         CLOCK_DELAY       = 0x40,
  43         ADMA_ADDRESS      = 0x44,
  44         CLOCK_CONTROL     = 0x48,
  45         LED_CONTROL       = 0x4c,
  46         VERSION           = 0x50
  47 };
  48
  49 struct jmb38x_ms_host {
  50         struct jmb38x_ms        *chip;
  51         void __iomem            *addr;
  52         spinlock_t              lock;
  53         int                     id;
  54         char                    host_id[DEVICE_ID_SIZE];
  55         int                     irq;
  56         unsigned int            block_pos;
  57         unsigned long           timeout_jiffies;
  58         struct timer_list       timer;
  59         struct memstick_request *req;
  60         unsigned char           eject:1,
  61                                 use_dma:1;
  62         unsigned char           cmd_flags;
  63         unsigned char           io_pos;
  64         unsigned int            io_word[2];
  65 };
  66
  67 struct jmb38x_ms {
  68         struct pci_dev        *pdev;
  69         int                   host_cnt;
  70         struct memstick_host  *hosts[];
  71 };
  72
  73 #define BLOCK_COUNT_MASK       0xffff0000
  74 #define BLOCK_SIZE_MASK        0x00000fff
  75
  76 #define DMA_CONTROL_ENABLE     0x00000001
  77
  78 #define TPC_DATA_SEL           0x00008000
  79 #define TPC_DIR                0x00004000
  80 #define TPC_WAIT_INT           0x00002000
  81 #define TPC_GET_INT            0x00000800
  82 #define TPC_CODE_SZ_MASK       0x00000700
  83 #define TPC_DATA_SZ_MASK       0x00000007
  84
  85 #define HOST_CONTROL_RESET_REQ 0x00008000
  86 #define HOST_CONTROL_REI       0x00004000
  87 #define HOST_CONTROL_LED       0x00000400
  88 #define HOST_CONTROL_FAST_CLK  0x00000200
  89 #define HOST_CONTROL_RESET     0x00000100
  90 #define HOST_CONTROL_POWER_EN  0x00000080
  91 #define HOST_CONTROL_CLOCK_EN  0x00000040
  92 #define HOST_CONTROL_IF_SHIFT  4
  93
  94 #define HOST_CONTROL_IF_SERIAL 0x0
  95 #define HOST_CONTROL_IF_PAR4   0x1
  96 #define HOST_CONTROL_IF_PAR8   0x3
  97
  98 #define STATUS_HAS_MEDIA        0x00000400
  99 #define STATUS_FIFO_EMPTY       0x00000200
 100 #define STATUS_FIFO_FULL        0x00000100
 101
 102 #define INT_STATUS_TPC_ERR      0x00080000
 103 #define INT_STATUS_CRC_ERR      0x00040000
 104 #define INT_STATUS_TIMER_TO     0x00020000
 105 #define INT_STATUS_HSK_TO       0x00010000
 106 #define INT_STATUS_ANY_ERR      0x00008000
 107 #define INT_STATUS_FIFO_WRDY    0x00000080
 108 #define INT_STATUS_FIFO_RRDY    0x00000040
 109 #define INT_STATUS_MEDIA_OUT    0x00000010
 110 #define INT_STATUS_MEDIA_IN     0x00000008
 111 #define INT_STATUS_DMA_BOUNDARY 0x00000004
 112 #define INT_STATUS_EOTRAN       0x00000002
 113 #define INT_STATUS_EOTPC        0x00000001
 114
 115 #define INT_STATUS_ALL          0x000f801f
 116
 117 #define PAD_OUTPUT_ENABLE_MS  0x0F3F
 118
 119 #define PAD_PU_PD_OFF         0x7FFF0000
 120 #define PAD_PU_PD_ON_MS_SOCK0 0x5f8f0000
 121 #define PAD_PU_PD_ON_MS_SOCK1 0x0f0f0000
 122
 123 enum {
 124         CMD_READY    = 0x01,
 125         FIFO_READY   = 0x02,
 126         REG_DATA     = 0x04,
 127         AUTO_GET_INT = 0x08
 128 };
 129
 130 static unsigned int jmb38x_ms_read_data(struct jmb38x_ms_host *host,
 131                                         unsigned char *buf, unsigned int length)
 132 {
 133         unsigned int off = 0;
 134
 135         while (host->io_pos && length) {
 136                 buf[off++] = host->io_word[0] & 0xff;
 137                 host->io_word[0] >>= 8;
 138                 length--;
 139                 host->io_pos--;
 140         }
 141
 142         if (!length)
 143                 return off;
 144
 145         while (!(STATUS_FIFO_EMPTY & readl(host->addr + STATUS))) {
 146                 if (length < 4)
 147                         break;
 148                 *(unsigned int *)(buf + off) = __raw_readl(host->addr + DATA);
 149                 length -= 4;
 150                 off += 4;
 151         }
 152
 153         if (length
 154             && !(STATUS_FIFO_EMPTY & readl(host->addr + STATUS))) {
 155                 host->io_word[0] = readl(host->addr + DATA);
 156                 for (host->io_pos = 4; host->io_pos; --host->io_pos) {
 157                         buf[off++] = host->io_word[0] & 0xff;
 158                         host->io_word[0] >>= 8;
 159                         length--;
 160                         if (!length)
 161                                 break;
 162                 }
 163         }
 164
 165         return off;
 166 }
 167
 168 static unsigned int jmb38x_ms_read_reg_data(struct jmb38x_ms_host *host,
 169                                             unsigned char *buf,
 170                                             unsigned int length)
 171 {
 172         unsigned int off = 0;
 173
 174         while (host->io_pos > 4 && length) {
 175                 buf[off++] = host->io_word[0] & 0xff;
 176                 host->io_word[0] >>= 8;
 177                 length--;
 178                 host->io_pos--;
 179         }
 180
 181         if (!length)
 182                 return off;
 183
 184         while (host->io_pos && length) {
 185                 buf[off++] = host->io_word[1] & 0xff;
 186                 host->io_word[1] >>= 8;
 187                 length--;
 188                 host->io_pos--;
 189         }
 190
 191         return off;
 192 }
 193
 194 static unsigned int jmb38x_ms_write_data(struct jmb38x_ms_host *host,
 195                                          unsigned char *buf,
 196                                          unsigned int length)
 197 {
 198         unsigned int off = 0;
 199
 200         if (host->io_pos) {
 201                 while (host->io_pos < 4 && length) {
 202                         host->io_word[0] |=  buf[off++] << (host->io_pos * 8);
 203                         host->io_pos++;
 204                         length--;
 205                 }
 206         }
 207
 208         if (host->io_pos == 4
 209             && !(STATUS_FIFO_FULL & readl(host->addr + STATUS))) {
 210                 writel(host->io_word[0], host->addr + DATA);
 211                 host->io_pos = 0;
 212                 host->io_word[0] = 0;
 213         } else if (host->io_pos) {
 214                 return off;
 215         }
 216
 217         if (!length)
 218                 return off;
 219
 220         while (!(STATUS_FIFO_FULL & readl(host->addr + STATUS))) {
 221                 if (length < 4)
 222                         break;
 223
 224                 __raw_writel(*(unsigned int *)(buf + off),
 225                              host->addr + DATA);
 226                 length -= 4;
 227                 off += 4;
 228         }
 229
 230         switch (length) {
 231         case 3:
 232                 host->io_word[0] |= buf[off + 2] << 16;
 233                 host->io_pos++;
 234         case 2:
 235                 host->io_word[0] |= buf[off + 1] << 8;
 236                 host->io_pos++;
 237         case 1:
 238                 host->io_word[0] |= buf[off];
 239                 host->io_pos++;
 240         }
 241
 242         off += host->io_pos;
 243
 244         return off;
 245 }
 246
 247 static unsigned int jmb38x_ms_write_reg_data(struct jmb38x_ms_host *host,
 248                                              unsigned char *buf,
 249                                              unsigned int length)
 250 {
 251         unsigned int off = 0;
 252
 253         while (host->io_pos < 4 && length) {
 254                 host->io_word[0] &= ~(0xff << (host->io_pos * 8));
 255                 host->io_word[0] |=  buf[off++] << (host->io_pos * 8);
 256                 host->io_pos++;
 257                 length--;
 258         }
 259
 260         if (!length)
 261                 return off;
 262
 263         while (host->io_pos < 8 && length) {
 264                 host->io_word[1] &= ~(0xff << (host->io_pos * 8));
 265                 host->io_word[1] |=  buf[off++] << (host->io_pos * 8);
 266                 host->io_pos++;
 267                 length--;
 268         }
 269
 270         return off;
 271 }
 272
 273 static int jmb38x_ms_transfer_data(struct jmb38x_ms_host *host)
 274 {
 275         unsigned int length;
 276         unsigned int off;
 277         unsigned int t_size, p_off, p_cnt;
 278         unsigned char *buf;
 279         struct page *pg;
 280         unsigned long flags = 0;
 281
 282         if (host->req->long_data) {
 283                 length = host->req->sg.length - host->block_pos;
 284                 off = host->req->sg.offset + host->block_pos;
 285         } else {
 286                 length = host->req->data_len - host->block_pos;
 287                 off = 0;
 288         }
 289
 290         while (length) {
 291                 if (host->req->long_data) {
 292                         pg = nth_page(sg_page(&host->req->sg),
 293                                       off >> PAGE_SHIFT);
 294                         p_off = offset_in_page(off);
 295                         p_cnt = PAGE_SIZE - p_off;
 296                         p_cnt = min(p_cnt, length);
 297
 298                         local_irq_save(flags);
 299                         buf = kmap_atomic(pg, KM_BIO_SRC_IRQ) + p_off;
 300                 } else {
 301                         buf = host->req->data + host->block_pos;
 302                         p_cnt = host->req->data_len - host->block_pos;
 303                 }
 304
 305                 if (host->req->data_dir == WRITE)
 306                         t_size = !(host->cmd_flags & REG_DATA)
 307                                  ? jmb38x_ms_write_data(host, buf, p_cnt)
 308                                  : jmb38x_ms_write_reg_data(host, buf, p_cnt);
 309                 else
 310                         t_size = !(host->cmd_flags & REG_DATA)
 311                                  ? jmb38x_ms_read_data(host, buf, p_cnt)
 312                                  : jmb38x_ms_read_reg_data(host, buf, p_cnt);
 313
 314                 if (host->req->long_data) {
 315                         kunmap_atomic(buf - p_off, KM_BIO_SRC_IRQ);
 316                         local_irq_restore(flags);
 317                 }
 318
 319                 if (!t_size)
 320                         break;
 321                 host->block_pos += t_size;
 322                 length -= t_size;
 323                 off += t_size;
 324         }
 325
 326         if (!length && host->req->data_dir == WRITE) {
 327                 if (host->cmd_flags & REG_DATA) {
 328                         writel(host->io_word[0], host->addr + TPC_P0);
 329                         writel(host->io_word[1], host->addr + TPC_P1);
 330                 } else if (host->io_pos) {
 331                         writel(host->io_word[0], host->addr + DATA);
 332                 }
 333         }
 334
 335         return length;
 336 }
 337
 338 static int jmb38x_ms_issue_cmd(struct memstick_host *msh)
 339 {
 340         struct jmb38x_ms_host *host = memstick_priv(msh);
 341         unsigned char *data;
 342         unsigned int data_len, cmd, t_val;
 343
 344         if (!(STATUS_HAS_MEDIA & readl(host->addr + STATUS))) {
 345                 dev_dbg(msh->cdev.dev, "no media status\n");
 346                 host->req->error = -ETIME;
 347                 return host->req->error;
 348         }
 349
 350         dev_dbg(msh->cdev.dev, "control %08x\n",
 351                 readl(host->addr + HOST_CONTROL));
 352         dev_dbg(msh->cdev.dev, "status %08x\n", readl(host->addr + INT_STATUS));
 353         dev_dbg(msh->cdev.dev, "hstatus %08x\n", readl(host->addr + STATUS));
 354
 355         host->cmd_flags = 0;
 356         host->block_pos = 0;
 357         host->io_pos = 0;
 358         host->io_word[0] = 0;
 359         host->io_word[1] = 0;
 360
 361         cmd = host->req->tpc << 16;
 362         cmd |= TPC_DATA_SEL;
 363
 364         if (host->req->data_dir == READ)
 365                 cmd |= TPC_DIR;
 366         if (host->req->need_card_int)
 367                 cmd |= TPC_WAIT_INT;
 368         if (host->req->get_int_reg)
 369                 cmd |= TPC_GET_INT;
 370
 371         data = host->req->data;
 372
 373         host->use_dma = !no_dma;
 374
 375         if (host->req->long_data) {
 376                 data_len = host->req->sg.length;
 377         } else {
 378                 data_len = host->req->data_len;
 379                 host->use_dma = 0;
 380         }
 381
 382         if (data_len <= 8) {
 383                 cmd &= ~(TPC_DATA_SEL | 0xf);
 384                 host->cmd_flags |= REG_DATA;
 385                 cmd |= data_len & 0xf;
 386                 host->use_dma = 0;
 387         }
 388
 389         if (host->use_dma) {
 390                 if (1 != pci_map_sg(host->chip->pdev, &host->req->sg, 1,
 391                                     host->req->data_dir == READ
 392                                     ? PCI_DMA_FROMDEVICE
 393                                     : PCI_DMA_TODEVICE)) {
 394                         host->req->error = -ENOMEM;
 395                         return host->req->error;
 396                 }
 397                 data_len = sg_dma_len(&host->req->sg);
 398                 writel(sg_dma_address(&host->req->sg),
 399                        host->addr + DMA_ADDRESS);
 400                 writel(((1 << 16) & BLOCK_COUNT_MASK)
 401                        | (data_len & BLOCK_SIZE_MASK),
 402                        host->addr + BLOCK);
 403                 writel(DMA_CONTROL_ENABLE, host->addr + DMA_CONTROL);
 404         } else if (!(host->cmd_flags & REG_DATA)) {
 405                 writel(((1 << 16) & BLOCK_COUNT_MASK)
 406                        | (data_len & BLOCK_SIZE_MASK),
 407                        host->addr + BLOCK);
 408                         t_val = readl(host->addr + INT_STATUS_ENABLE);
 409                         t_val |= host->req->data_dir == READ
 410                                  ? INT_STATUS_FIFO_RRDY
 411                                  : INT_STATUS_FIFO_WRDY;
 412
 413                         writel(t_val, host->addr + INT_STATUS_ENABLE);
 414                         writel(t_val, host->addr + INT_SIGNAL_ENABLE);
 415         } else {
 416                 cmd &= ~(TPC_DATA_SEL | 0xf);
 417                 host->cmd_flags |= REG_DATA;
 418                 cmd |= data_len & 0xf;
 419
 420                 if (host->req->data_dir == WRITE) {
 421                         jmb38x_ms_transfer_data(host);
 422                         writel(host->io_word[0], host->addr + TPC_P0);
 423                         writel(host->io_word[1], host->addr + TPC_P1);
 424                 }
 425         }
 426
 427         mod_timer(&host->timer, jiffies + host->timeout_jiffies);
 428         writel(HOST_CONTROL_LED | readl(host->addr + HOST_CONTROL),
 429                host->addr + HOST_CONTROL);
 430         host->req->error = 0;
 431
 432         writel(cmd, host->addr + TPC);
 433         dev_dbg(msh->cdev.dev, "executing TPC %08x, len %x\n", cmd, data_len);
 434
 435         return 0;
 436 }
 437
 438 static void jmb38x_ms_complete_cmd(struct memstick_host *msh, int last)
 439 {
 440         struct jmb38x_ms_host *host = memstick_priv(msh);
 441         unsigned int t_val = 0;
 442         int rc;
 443
 444         del_timer(&host->timer);
 445
 446         dev_dbg(msh->cdev.dev, "c control %08x\n",
 447                 readl(host->addr + HOST_CONTROL));
 448         dev_dbg(msh->cdev.dev, "c status %08x\n",
 449                 readl(host->addr + INT_STATUS));
 450         dev_dbg(msh->cdev.dev, "c hstatus %08x\n", readl(host->addr + STATUS));
 451
 452         if (host->req->get_int_reg) {
 453                 t_val = readl(host->addr + TPC_P0);
 454                 host->req->int_reg = (t_val & 0xff);
 455         }
 456
 457         if (host->use_dma) {
 458                 writel(0, host->addr + DMA_CONTROL);
 459                 pci_unmap_sg(host->chip->pdev, &host->req->sg, 1,
 460                              host->req->data_dir == READ
 461                              ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
 462         } else {
 463                 t_val = readl(host->addr + INT_STATUS_ENABLE);
 464                 if (host->req->data_dir == READ)
 465                         t_val &= ~INT_STATUS_FIFO_RRDY;
 466                 else
 467                         t_val &= ~INT_STATUS_FIFO_WRDY;
 468
 469                 writel(t_val, host->addr + INT_STATUS_ENABLE);
 470                 writel(t_val, host->addr + INT_SIGNAL_ENABLE);
 471         }
 472
 473         writel((~HOST_CONTROL_LED) & readl(host->addr + HOST_CONTROL),
 474                host->addr + HOST_CONTROL);
 475
 476         if (!last) {
 477                 do {
 478                         rc = memstick_next_req(msh, &host->req);
 479                 } while (!rc && jmb38x_ms_issue_cmd(msh));
 480         } else {
 481                 do {
 482                         rc = memstick_next_req(msh, &host->req);
 483                         if (!rc)
 484                                 host->req->error = -ETIME;
 485                 } while (!rc);
 486         }
 487 }
 488
 489 static irqreturn_t jmb38x_ms_isr(int irq, void *dev_id)
 490 {
 491         struct memstick_host *msh = dev_id;
 492         struct jmb38x_ms_host *host = memstick_priv(msh);
 493         unsigned int irq_status;
 494
 495         spin_lock(&host->lock);
 496         irq_status = readl(host->addr + INT_STATUS);
 497         dev_dbg(&host->chip->pdev->dev, "irq_status = %08x\n", irq_status);
 498         if (irq_status == 0 || irq_status == (~0)) {
 499                 spin_unlock(&host->lock);
 500                 return IRQ_NONE;
 501         }
 502
 503         if (host->req) {
 504                 if (irq_status & INT_STATUS_ANY_ERR) {
 505                         if (irq_status & INT_STATUS_CRC_ERR)
 506                                 host->req->error = -EILSEQ;
 507                         else
 508                                 host->req->error = -ETIME;
 509                 } else {
 510                         if (host->use_dma) {
 511                                 if (irq_status & INT_STATUS_EOTRAN)
 512                                         host->cmd_flags |= FIFO_READY;
 513                         } else {
 514                                 if (irq_status & (INT_STATUS_FIFO_RRDY
 515                                                   | INT_STATUS_FIFO_WRDY))
 516                                         jmb38x_ms_transfer_data(host);
 517
 518                                 if (irq_status & INT_STATUS_EOTRAN) {
 519                                         jmb38x_ms_transfer_data(host);
 520                                         host->cmd_flags |= FIFO_READY;
 521                                 }
 522                         }
 523
 524                         if (irq_status & INT_STATUS_EOTPC) {
 525                                 host->cmd_flags |= CMD_READY;
 526                                 if (host->cmd_flags & REG_DATA) {
 527                                         if (host->req->data_dir == READ) {
 528                                                 host->io_word[0]
 529                                                         = readl(host->addr
 530                                                                 + TPC_P0);
 531                                                 host->io_word[1]
 532                                                         = readl(host->addr
 533                                                                 + TPC_P1);
 534                                                 host->io_pos = 8;
 535
 536                                                 jmb38x_ms_transfer_data(host);
 537                                         }
 538                                         host->cmd_flags |= FIFO_READY;
 539                                 }
 540                         }
 541                 }
 542         }
 543
 544         if (irq_status & (INT_STATUS_MEDIA_IN | INT_STATUS_MEDIA_OUT)) {
 545                 dev_dbg(&host->chip->pdev->dev, "media changed\n");
 546                 memstick_detect_change(msh);
 547         }
 548
 549         writel(irq_status, host->addr + INT_STATUS);
 550
 551         if (host->req
 552             && (((host->cmd_flags & CMD_READY)
 553                  && (host->cmd_flags & FIFO_READY))
 554                 || host->req->error))
 555                 jmb38x_ms_complete_cmd(msh, 0);
 556
 557         spin_unlock(&host->lock);
 558         return IRQ_HANDLED;
 559 }
 560
 561 static void jmb38x_ms_abort(unsigned long data)
 562 {
 563         struct memstick_host *msh = (struct memstick_host *)data;
 564         struct jmb38x_ms_host *host = memstick_priv(msh);
 565         unsigned long flags;
 566
 567         dev_dbg(&host->chip->pdev->dev, "abort\n");
 568         spin_lock_irqsave(&host->lock, flags);
 569         if (host->req) {
 570                 host->req->error = -ETIME;
 571                 jmb38x_ms_complete_cmd(msh, 0);
 572         }
 573         spin_unlock_irqrestore(&host->lock, flags);
 574 }
 575
 576 static void jmb38x_ms_request(struct memstick_host *msh)
 577 {
 578         struct jmb38x_ms_host *host = memstick_priv(msh);
 579         unsigned long flags;
 580         int rc;
 581
 582         spin_lock_irqsave(&host->lock, flags);
 583         if (host->req) {
 584                 spin_unlock_irqrestore(&host->lock, flags);
 585                 BUG();
 586                 return;
 587         }
 588
 589         do {
 590                 rc = memstick_next_req(msh, &host->req);
 591         } while (!rc && jmb38x_ms_issue_cmd(msh));
 592         spin_unlock_irqrestore(&host->lock, flags);
 593 }
 594
 595 static void jmb38x_ms_reset(struct jmb38x_ms_host *host)
 596 {
 597         unsigned int host_ctl = readl(host->addr + HOST_CONTROL);
 598
 599         writel(host_ctl | HOST_CONTROL_RESET_REQ | HOST_CONTROL_RESET,
 600                host->addr + HOST_CONTROL);
 601
 602         while (HOST_CONTROL_RESET_REQ
 603                & (host_ctl = readl(host->addr + HOST_CONTROL))) {
 604                 ndelay(100);
 605                 dev_dbg(&host->chip->pdev->dev, "reset\n");
 606         }
 607
 608         writel(INT_STATUS_ALL, host->addr + INT_STATUS_ENABLE);
 609         writel(INT_STATUS_ALL, host->addr + INT_SIGNAL_ENABLE);
 610
 611         dev_dbg(&host->chip->pdev->dev, "reset\n");
 612 }
 613
 614 static void jmb38x_ms_set_param(struct memstick_host *msh,
 615                                 enum memstick_param param,
 616                                 int value)
 617 {
 618         struct jmb38x_ms_host *host = memstick_priv(msh);
 619         unsigned int host_ctl;
 620         unsigned long flags;
 621
 622         spin_lock_irqsave(&host->lock, flags);
 623
 624         switch (param) {
 625         case MEMSTICK_POWER:
 626                 if (value == MEMSTICK_POWER_ON) {
 627                         jmb38x_ms_reset(host);
 628
 629                         writel(host->id ? PAD_PU_PD_ON_MS_SOCK1
 630                                           : PAD_PU_PD_ON_MS_SOCK0,
 631                                host->addr + PAD_PU_PD);
 632
 633                         writel(PAD_OUTPUT_ENABLE_MS,
 634                                host->addr + PAD_OUTPUT_ENABLE);
 635
 636                         host_ctl = readl(host->addr + HOST_CONTROL);
 637                         host_ctl |= 7;
 638                         writel(host_ctl | (HOST_CONTROL_POWER_EN
 639                                            | HOST_CONTROL_CLOCK_EN),
 640                                host->addr + HOST_CONTROL);
 641
 642                         dev_dbg(&host->chip->pdev->dev, "power on\n");
 643                 } else if (value == MEMSTICK_POWER_OFF) {
 644                         writel(readl(host->addr + HOST_CONTROL)
 645                                & ~(HOST_CONTROL_POWER_EN
 646                                    | HOST_CONTROL_CLOCK_EN),
 647                                host->addr +  HOST_CONTROL);
 648                         writel(0, host->addr + PAD_OUTPUT_ENABLE);
 649                         writel(PAD_PU_PD_OFF, host->addr + PAD_PU_PD);
 650                         dev_dbg(&host->chip->pdev->dev, "power off\n");
 651                 }
 652                 break;
 653         case MEMSTICK_INTERFACE:
 654                 /* jmb38x_ms_reset(host); */
 655
 656                 host_ctl = readl(host->addr + HOST_CONTROL);
 657                 host_ctl &= ~(3 << HOST_CONTROL_IF_SHIFT);
 658                 /* host_ctl |= 7; */
 659
 660                 if (value == MEMSTICK_SERIAL) {
 661                         host_ctl &= ~HOST_CONTROL_FAST_CLK;
 662                         host_ctl |= HOST_CONTROL_IF_SERIAL
 663                                     << HOST_CONTROL_IF_SHIFT;
 664                         host_ctl |= HOST_CONTROL_REI;
 665                         writel(0, host->addr + CLOCK_DELAY);
 666                 } else if (value == MEMSTICK_PAR4) {
 667                         host_ctl |= HOST_CONTROL_FAST_CLK;
 668                         host_ctl |= HOST_CONTROL_IF_PAR4
 669                                     << HOST_CONTROL_IF_SHIFT;
 670                         host_ctl &= ~HOST_CONTROL_REI;
 671                         writel(4, host->addr + CLOCK_DELAY);
 672                 } else if (value == MEMSTICK_PAR8) {
 673                         host_ctl |= HOST_CONTROL_FAST_CLK;
 674                         host_ctl |= HOST_CONTROL_IF_PAR8
 675                                     << HOST_CONTROL_IF_SHIFT;
 676                         host_ctl &= ~HOST_CONTROL_REI;
 677                         writel(4, host->addr + CLOCK_DELAY);
 678                 }
 679                 writel(host_ctl, host->addr + HOST_CONTROL);
 680                 break;
 681         };
 682
 683         spin_unlock_irqrestore(&host->lock, flags);
 684 }
 685
 686 #ifdef CONFIG_PM
 687
 688 static int jmb38x_ms_suspend(struct pci_dev *dev, pm_message_t state)
 689 {
 690         struct jmb38x_ms *jm = pci_get_drvdata(dev);
 691         int cnt;
 692
 693         for (cnt = 0; cnt < jm->host_cnt; ++cnt) {
 694                 if (!jm->hosts[cnt])
 695                         break;
 696                 memstick_suspend_host(jm->hosts[cnt]);
 697         }
 698
 699         pci_save_state(dev);
 700         pci_enable_wake(dev, pci_choose_state(dev, state), 0);
 701         pci_disable_device(dev);
 702         pci_set_power_state(dev, pci_choose_state(dev, state));
 703         return 0;
 704 }
 705
 706 static int jmb38x_ms_resume(struct pci_dev *dev)
 707 {
 708         struct jmb38x_ms *jm = pci_get_drvdata(dev);
 709         int rc;
 710
 711         pci_set_power_state(dev, PCI_D0);
 712         pci_restore_state(dev);
 713         rc = pci_enable_device(dev);
 714         if (rc)
 715                 return rc;
 716         pci_set_master(dev);
 717
 718         pci_read_config_dword(dev, 0xac, &rc);
 719         pci_write_config_dword(dev, 0xac, rc | 0x00470000);
 720
 721         for (rc = 0; rc < jm->host_cnt; ++rc) {
 722                 if (!jm->hosts[rc])
 723                         break;
 724                 memstick_resume_host(jm->hosts[rc]);
 725                 memstick_detect_change(jm->hosts[rc]);
 726         }
 727
 728         return 0;
 729 }
 730
 731 #else
 732
 733 #define jmb38x_ms_suspend NULL
 734 #define jmb38x_ms_resume NULL
 735
 736 #endif /* CONFIG_PM */
 737
 738 static int jmb38x_ms_count_slots(struct pci_dev *pdev)
 739 {
 740         int cnt, rc = 0;
 741
 742         for (cnt = 0; cnt < PCI_ROM_RESOURCE; ++cnt) {
 743                 if (!(IORESOURCE_MEM & pci_resource_flags(pdev, cnt)))
 744                         break;
 745
 746                 if (256 != pci_resource_len(pdev, cnt))
 747                         break;
 748
 749                 ++rc;
 750         }
 751         return rc;
 752 }
 753
 754 static struct memstick_host *jmb38x_ms_alloc_host(struct jmb38x_ms *jm, int cnt)
 755 {
 756         struct memstick_host *msh;
 757         struct jmb38x_ms_host *host;
 758
 759         msh = memstick_alloc_host(sizeof(struct jmb38x_ms_host),
 760                                   &jm->pdev->dev);
 761         if (!msh)
 762                 return NULL;
 763
 764         host = memstick_priv(msh);
 765         host->chip = jm;
 766         host->addr = ioremap(pci_resource_start(jm->pdev, cnt),
 767                              pci_resource_len(jm->pdev, cnt));
 768         if (!host->addr)
 769                 goto err_out_free;
 770
 771         spin_lock_init(&host->lock);
 772         host->id = cnt;
 773         snprintf(host->host_id, DEVICE_ID_SIZE, DRIVER_NAME ":slot%d",
 774                  host->id);
 775         host->irq = jm->pdev->irq;
 776         host->timeout_jiffies = msecs_to_jiffies(4000);
 777         msh->request = jmb38x_ms_request;
 778         msh->set_param = jmb38x_ms_set_param;
 779         /*
 780         msh->caps = MEMSTICK_CAP_AUTO_GET_INT | MEMSTICK_CAP_PAR4
 781                     | MEMSTICK_CAP_PAR8;
 782         */
 783         msh->caps = MEMSTICK_CAP_PAR4 | MEMSTICK_CAP_PAR8;
 784
 785         setup_timer(&host->timer, jmb38x_ms_abort, (unsigned long)msh);
 786
 787         if (!request_irq(host->irq, jmb38x_ms_isr, IRQF_SHARED, host->host_id,
 788                          msh))
 789                 return msh;
 790
 791         iounmap(host->addr);
 792 err_out_free:
 793         kfree(msh);
 794         return NULL;
 795 }
 796
 797 static void jmb38x_ms_free_host(struct memstick_host *msh)
 798 {
 799         struct jmb38x_ms_host *host = memstick_priv(msh);
 800
 801         free_irq(host->irq, msh);
 802         iounmap(host->addr);
 803         memstick_free_host(msh);
 804 }
 805
 806 static int jmb38x_ms_probe(struct pci_dev *pdev,
 807                            const struct pci_device_id *dev_id)
 808 {
 809         struct jmb38x_ms *jm;
 810         int pci_dev_busy = 0;
 811         int rc, cnt;
 812
 813         rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
 814         if (rc)
 815                 return rc;
 816
 817         rc = pci_enable_device(pdev);
 818         if (rc)
 819                 return rc;
 820
 821         pci_set_master(pdev);
 822
 823         rc = pci_request_regions(pdev, DRIVER_NAME);
 824         if (rc) {
 825                 pci_dev_busy = 1;
 826                 goto err_out;
 827         }
 828
 829         pci_read_config_dword(pdev, 0xac, &rc);
 830         pci_write_config_dword(pdev, 0xac, rc | 0x00470000);
 831
 832         cnt = jmb38x_ms_count_slots(pdev);
 833         if (!cnt) {
 834                 rc = -ENODEV;
 835                 pci_dev_busy = 1;
 836                 goto err_out;
 837         }
 838
 839         jm = kzalloc(sizeof(struct jmb38x_ms)
 840                      + cnt * sizeof(struct memstick_host *), GFP_KERNEL);
 841         if (!jm) {
 842                 rc = -ENOMEM;
 843                 goto err_out_int;
 844         }
 845
 846         jm->pdev = pdev;
 847         jm->host_cnt = cnt;
 848         pci_set_drvdata(pdev, jm);
 849
 850         for (cnt = 0; cnt < jm->host_cnt; ++cnt) {
 851                 jm->hosts[cnt] = jmb38x_ms_alloc_host(jm, cnt);
 852                 if (!jm->hosts[cnt])
 853                         break;
 854
 855                 rc = memstick_add_host(jm->hosts[cnt]);
 856
 857                 if (rc) {
 858                         jmb38x_ms_free_host(jm->hosts[cnt]);
 859                         jm->hosts[cnt] = NULL;
 860                         break;
 861                 }
 862         }
 863
 864         if (cnt)
 865                 return 0;
 866
 867         rc = -ENODEV;
 868
 869         pci_set_drvdata(pdev, NULL);
 870         kfree(jm);
 871 err_out_int:
 872         pci_release_regions(pdev);
 873 err_out:
 874         if (!pci_dev_busy)
 875                 pci_disable_device(pdev);
 876         return rc;
 877 }
 878
 879 static void jmb38x_ms_remove(struct pci_dev *dev)
 880 {
 881         struct jmb38x_ms *jm = pci_get_drvdata(dev);
 882         struct jmb38x_ms_host *host;
 883         int cnt;
 884         unsigned long flags;
 885
 886         for (cnt = 0; cnt < jm->host_cnt; ++cnt) {
 887                 if (!jm->hosts[cnt])
 888                         break;
 889
 890                 host = memstick_priv(jm->hosts[cnt]);
 891
 892                 writel(0, host->addr + INT_SIGNAL_ENABLE);
 893                 writel(0, host->addr + INT_STATUS_ENABLE);
 894                 mmiowb();
 895                 dev_dbg(&jm->pdev->dev, "interrupts off\n");
 896                 spin_lock_irqsave(&host->lock, flags);
 897                 if (host->req) {
 898                         host->req->error = -ETIME;
 899                         jmb38x_ms_complete_cmd(jm->hosts[cnt], 1);
 900                 }
 901                 spin_unlock_irqrestore(&host->lock, flags);
 902
 903                 memstick_remove_host(jm->hosts[cnt]);
 904                 dev_dbg(&jm->pdev->dev, "host removed\n");
 905
 906                 jmb38x_ms_free_host(jm->hosts[cnt]);
 907         }
 908
 909         pci_set_drvdata(dev, NULL);
 910         pci_release_regions(dev);
 911         pci_disable_device(dev);
 912         kfree(jm);
 913 }
 914
 915 static struct pci_device_id jmb38x_ms_id_tbl [] = {
 916         { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB38X_MS, PCI_ANY_ID,
 917           PCI_ANY_ID, 0, 0, 0 },
 918         { }
 919 };
 920
 921 static struct pci_driver jmb38x_ms_driver = {
 922         .name = DRIVER_NAME,
 923         .id_table = jmb38x_ms_id_tbl,
 924         .probe = jmb38x_ms_probe,
 925         .remove = jmb38x_ms_remove,
 926         .suspend = jmb38x_ms_suspend,
 927         .resume = jmb38x_ms_resume
 928 };
 929
 930 static int __init jmb38x_ms_init(void)
 931 {
 932         return pci_register_driver(&jmb38x_ms_driver);
 933 }
 934
 935 static void __exit jmb38x_ms_exit(void)
 936 {
 937         pci_unregister_driver(&jmb38x_ms_driver);
 938 }
 939
 940 MODULE_AUTHOR("Alex Dubov");
 941 MODULE_DESCRIPTION("JMicron jmb38x MemoryStick driver");
 942 MODULE_LICENSE("GPL");
 943 MODULE_DEVICE_TABLE(pci, jmb38x_ms_id_tbl);
 944
 945 module_init(jmb38x_ms_init);
 946 module_exit(jmb38x_ms_exit);