drivers/pcmcia/pd6729.c

   1 /*
   2  * Driver for the Cirrus PD6729 PCI-PCMCIA bridge.
   3  *
   4  * Based on the i82092.c driver.
   5  *
   6  * This software may be used and distributed according to the terms of
   7  * the GNU General Public License, incorporated herein by reference.
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/slab.h>
  13 #include <linux/pci.h>
  14 #include <linux/init.h>
  15 #include <linux/workqueue.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/device.h>
  18 #include <linux/io.h>
  19
  20 #include <pcmcia/ss.h>
  21
  22
  23 #include "pd6729.h"
  24 #include "i82365.h"
  25 #include "cirrus.h"
  26
  27 MODULE_LICENSE("GPL");
  28 MODULE_DESCRIPTION("Driver for the Cirrus PD6729 PCI-PCMCIA bridge");
  29 MODULE_AUTHOR("Jun Komuro <komurojun-mbn@nifty.com>");
  30
  31 #define MAX_SOCKETS 2
  32
  33 /*
  34  * simple helper functions
  35  * External clock time, in nanoseconds.  120 ns = 8.33 MHz
  36  */
  37 #define to_cycles(ns)   ((ns)/120)
  38
  39 #ifndef NO_IRQ
  40 #define NO_IRQ  ((unsigned int)(0))
  41 #endif
  42
  43 /*
  44  * PARAMETERS
  45  *  irq_mode=n
  46  *     Specifies the interrupt delivery mode.  The default (1) is to use PCI
  47  *     interrupts; a value of 0 selects ISA interrupts. This must be set for
  48  *     correct operation of PCI card readers.
  49  */
  50
  51 static int irq_mode = 1; /* 0 = ISA interrupt, 1 = PCI interrupt */
  52
  53 module_param(irq_mode, int, 0444);
  54 MODULE_PARM_DESC(irq_mode,
  55                 "interrupt delivery mode. 0 = ISA, 1 = PCI. default is 1");
  56
  57 static DEFINE_SPINLOCK(port_lock);
  58
  59 /* basic value read/write functions */
  60
  61 static unsigned char indirect_read(struct pd6729_socket *socket,
  62                                    unsigned short reg)
  63 {
  64         unsigned long port;
  65         unsigned char val;
  66         unsigned long flags;
  67
  68         spin_lock_irqsave(&port_lock, flags);
  69         reg += socket->number * 0x40;
  70         port = socket->io_base;
  71         outb(reg, port);
  72         val = inb(port + 1);
  73         spin_unlock_irqrestore(&port_lock, flags);
  74
  75         return val;
  76 }
  77
  78 static unsigned short indirect_read16(struct pd6729_socket *socket,
  79                                       unsigned short reg)
  80 {
  81         unsigned long port;
  82         unsigned short tmp;
  83         unsigned long flags;
  84
  85         spin_lock_irqsave(&port_lock, flags);
  86         reg  = reg + socket->number * 0x40;
  87         port = socket->io_base;
  88         outb(reg, port);
  89         tmp = inb(port + 1);
  90         reg++;
  91         outb(reg, port);
  92         tmp = tmp | (inb(port + 1) << 8);
  93         spin_unlock_irqrestore(&port_lock, flags);
  94
  95         return tmp;
  96 }
  97
  98 static void indirect_write(struct pd6729_socket *socket, unsigned short reg,
  99                            unsigned char value)
 100 {
 101         unsigned long port;
 102         unsigned long flags;
 103
 104         spin_lock_irqsave(&port_lock, flags);
 105         reg = reg + socket->number * 0x40;
 106         port = socket->io_base;
 107         outb(reg, port);
 108         outb(value, port + 1);
 109         spin_unlock_irqrestore(&port_lock, flags);
 110 }
 111
 112 static void indirect_setbit(struct pd6729_socket *socket, unsigned short reg,
 113                             unsigned char mask)
 114 {
 115         unsigned long port;
 116         unsigned char val;
 117         unsigned long flags;
 118
 119         spin_lock_irqsave(&port_lock, flags);
 120         reg = reg + socket->number * 0x40;
 121         port = socket->io_base;
 122         outb(reg, port);
 123         val = inb(port + 1);
 124         val |= mask;
 125         outb(reg, port);
 126         outb(val, port + 1);
 127         spin_unlock_irqrestore(&port_lock, flags);
 128 }
 129
 130 static void indirect_resetbit(struct pd6729_socket *socket, unsigned short reg,
 131                               unsigned char mask)
 132 {
 133         unsigned long port;
 134         unsigned char val;
 135         unsigned long flags;
 136
 137         spin_lock_irqsave(&port_lock, flags);
 138         reg = reg + socket->number * 0x40;
 139         port = socket->io_base;
 140         outb(reg, port);
 141         val = inb(port + 1);
 142         val &= ~mask;
 143         outb(reg, port);
 144         outb(val, port + 1);
 145         spin_unlock_irqrestore(&port_lock, flags);
 146 }
 147
 148 static void indirect_write16(struct pd6729_socket *socket, unsigned short reg,
 149                              unsigned short value)
 150 {
 151         unsigned long port;
 152         unsigned char val;
 153         unsigned long flags;
 154
 155         spin_lock_irqsave(&port_lock, flags);
 156         reg = reg + socket->number * 0x40;
 157         port = socket->io_base;
 158
 159         outb(reg, port);
 160         val = value & 255;
 161         outb(val, port + 1);
 162
 163         reg++;
 164
 165         outb(reg, port);
 166         val = value >> 8;
 167         outb(val, port + 1);
 168         spin_unlock_irqrestore(&port_lock, flags);
 169 }
 170
 171 /* Interrupt handler functionality */
 172
 173 static irqreturn_t pd6729_interrupt(int irq, void *dev)
 174 {
 175         struct pd6729_socket *socket = (struct pd6729_socket *)dev;
 176         int i;
 177         int loopcount = 0;
 178         int handled = 0;
 179         unsigned int events, active = 0;
 180
 181         while (1) {
 182                 loopcount++;
 183                 if (loopcount > 20) {
 184                         printk(KERN_ERR "pd6729: infinite eventloop "
 185                                "in interrupt\n");
 186                         break;
 187                 }
 188
 189                 active = 0;
 190
 191                 for (i = 0; i < MAX_SOCKETS; i++) {
 192                         unsigned int csc;
 193
 194                         /* card status change register */
 195                         csc = indirect_read(&socket[i], I365_CSC);
 196                         if (csc == 0)  /* no events on this socket */
 197                                 continue;
 198
 199                         handled = 1;
 200                         events = 0;
 201
 202                         if (csc & I365_CSC_DETECT) {
 203                                 events |= SS_DETECT;
 204                                 dev_vdbg(&socket[i].socket.dev,
 205                                         "Card detected in socket %i!\n", i);
 206                         }
 207
 208                         if (indirect_read(&socket[i], I365_INTCTL)
 209                                                 & I365_PC_IOCARD) {
 210                                 /* For IO/CARDS, bit 0 means "read the card" */
 211                                 events |= (csc & I365_CSC_STSCHG)
 212                                                 ? SS_STSCHG : 0;
 213                         } else {
 214                                 /* Check for battery/ready events */
 215                                 events |= (csc & I365_CSC_BVD1)
 216                                                 ? SS_BATDEAD : 0;
 217                                 events |= (csc & I365_CSC_BVD2)
 218                                                 ? SS_BATWARN : 0;
 219                                 events |= (csc & I365_CSC_READY)
 220                                                 ? SS_READY : 0;
 221                         }
 222
 223                         if (events)
 224                                 pcmcia_parse_events(&socket[i].socket, events);
 225
 226                         active |= events;
 227                 }
 228
 229                 if (active == 0) /* no more events to handle */
 230                         break;
 231         }
 232         return IRQ_RETVAL(handled);
 233 }
 234
 235 /* socket functions */
 236
 237 static void pd6729_interrupt_wrapper(struct timer_list *t)
 238 {
 239         struct pd6729_socket *socket = from_timer(socket, t, poll_timer);
 240
 241         pd6729_interrupt(0, (void *)socket);
 242         mod_timer(&socket->poll_timer, jiffies + HZ);
 243 }
 244
 245 static int pd6729_get_status(struct pcmcia_socket *sock, u_int *value)
 246 {
 247         struct pd6729_socket *socket
 248                         = container_of(sock, struct pd6729_socket, socket);
 249         unsigned int status;
 250         unsigned int data;
 251         struct pd6729_socket *t;
 252
 253         /* Interface Status Register */
 254         status = indirect_read(socket, I365_STATUS);
 255         *value = 0;
 256
 257         if ((status & I365_CS_DETECT) == I365_CS_DETECT)
 258                 *value |= SS_DETECT;
 259
 260         /*
 261          * IO cards have a different meaning of bits 0,1
 262          * Also notice the inverse-logic on the bits
 263          */
 264         if (indirect_read(socket, I365_INTCTL) & I365_PC_IOCARD) {
 265                 /* IO card */
 266                 if (!(status & I365_CS_STSCHG))
 267                         *value |= SS_STSCHG;
 268         } else {
 269                 /* non I/O card */
 270                 if (!(status & I365_CS_BVD1))
 271                         *value |= SS_BATDEAD;
 272                 if (!(status & I365_CS_BVD2))
 273                         *value |= SS_BATWARN;
 274         }
 275
 276         if (status & I365_CS_WRPROT)
 277                 *value |= SS_WRPROT;    /* card is write protected */
 278
 279         if (status & I365_CS_READY)
 280                 *value |= SS_READY;     /* card is not busy */
 281
 282         if (status & I365_CS_POWERON)
 283                 *value |= SS_POWERON;   /* power is applied to the card */
 284
 285         t = (socket->number) ? socket : socket + 1;
 286         indirect_write(t, PD67_EXT_INDEX, PD67_EXTERN_DATA);
 287         data = indirect_read16(t, PD67_EXT_DATA);
 288         *value |= (data & PD67_EXD_VS1(socket->number)) ? 0 : SS_3VCARD;
 289
 290         return 0;
 291 }
 292
 293
 294 static int pd6729_set_socket(struct pcmcia_socket *sock, socket_state_t *state)
 295 {
 296         struct pd6729_socket *socket
 297                         = container_of(sock, struct pd6729_socket, socket);
 298         unsigned char reg, data;
 299
 300         /* First, set the global controller options */
 301         indirect_write(socket, I365_GBLCTL, 0x00);
 302         indirect_write(socket, I365_GENCTL, 0x00);
 303
 304         /* Values for the IGENC register */
 305         socket->card_irq = state->io_irq;
 306
 307         reg = 0;
 308         /* The reset bit has "inverse" logic */
 309         if (!(state->flags & SS_RESET))
 310                 reg |= I365_PC_RESET;
 311         if (state->flags & SS_IOCARD)
 312                 reg |= I365_PC_IOCARD;
 313
 314         /* IGENC, Interrupt and General Control Register */
 315         indirect_write(socket, I365_INTCTL, reg);
 316
 317         /* Power registers */
 318
 319         reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */
 320
 321         if (state->flags & SS_PWR_AUTO) {
 322                 dev_dbg(&sock->dev, "Auto power\n");
 323                 reg |= I365_PWR_AUTO;   /* automatic power mngmnt */
 324         }
 325         if (state->flags & SS_OUTPUT_ENA) {
 326                 dev_dbg(&sock->dev, "Power Enabled\n");
 327                 reg |= I365_PWR_OUT;    /* enable power */
 328         }
 329
 330         switch (state->Vcc) {
 331         case 0:
 332                 break;
 333         case 33:
 334                 dev_dbg(&sock->dev,
 335                         "setting voltage to Vcc to 3.3V on socket %i\n",
 336                         socket->number);
 337                 reg |= I365_VCC_5V;
 338                 indirect_setbit(socket, PD67_MISC_CTL_1, PD67_MC1_VCC_3V);
 339                 break;
 340         case 50:
 341                 dev_dbg(&sock->dev,
 342                         "setting voltage to Vcc to 5V on socket %i\n",
 343                         socket->number);
 344                 reg |= I365_VCC_5V;
 345                 indirect_resetbit(socket, PD67_MISC_CTL_1, PD67_MC1_VCC_3V);
 346                 break;
 347         default:
 348                 dev_dbg(&sock->dev,
 349                         "pd6729_set_socket called with invalid VCC power "
 350                         "value: %i\n", state->Vcc);
 351                 return -EINVAL;
 352         }
 353
 354         switch (state->Vpp) {
 355         case 0:
 356                 dev_dbg(&sock->dev, "not setting Vpp on socket %i\n",
 357                         socket->number);
 358                 break;
 359         case 33:
 360         case 50:
 361                 dev_dbg(&sock->dev, "setting Vpp to Vcc for socket %i\n",
 362                         socket->number);
 363                 reg |= I365_VPP1_5V;
 364                 break;
 365         case 120:
 366                 dev_dbg(&sock->dev, "setting Vpp to 12.0\n");
 367                 reg |= I365_VPP1_12V;
 368                 break;
 369         default:
 370                 dev_dbg(&sock->dev, "pd6729: pd6729_set_socket called with "
 371                         "invalid VPP power value: %i\n", state->Vpp);
 372                 return -EINVAL;
 373         }
 374
 375         /* only write if changed */
 376         if (reg != indirect_read(socket, I365_POWER))
 377                 indirect_write(socket, I365_POWER, reg);
 378
 379         if (irq_mode == 1) {
 380                 /* all interrupts are to be done as PCI interrupts */
 381                 data = PD67_EC1_INV_MGMT_IRQ | PD67_EC1_INV_CARD_IRQ;
 382         } else
 383                 data = 0;
 384
 385         indirect_write(socket, PD67_EXT_INDEX, PD67_EXT_CTL_1);
 386         indirect_write(socket, PD67_EXT_DATA, data);
 387
 388         /* Enable specific interrupt events */
 389
 390         reg = 0x00;
 391         if (state->csc_mask & SS_DETECT)
 392                 reg |= I365_CSC_DETECT;
 393
 394         if (state->flags & SS_IOCARD) {
 395                 if (state->csc_mask & SS_STSCHG)
 396                         reg |= I365_CSC_STSCHG;
 397         } else {
 398                 if (state->csc_mask & SS_BATDEAD)
 399                         reg |= I365_CSC_BVD1;
 400                 if (state->csc_mask & SS_BATWARN)
 401                         reg |= I365_CSC_BVD2;
 402                 if (state->csc_mask & SS_READY)
 403                         reg |= I365_CSC_READY;
 404         }
 405         if (irq_mode == 1)
 406                 reg |= 0x30;    /* management IRQ: PCI INTA# = "irq 3" */
 407         indirect_write(socket, I365_CSCINT, reg);
 408
 409         reg = indirect_read(socket, I365_INTCTL);
 410         if (irq_mode == 1)
 411                 reg |= 0x03;    /* card IRQ: PCI INTA# = "irq 3" */
 412         else
 413                 reg |= socket->card_irq;
 414         indirect_write(socket, I365_INTCTL, reg);
 415
 416         /* now clear the (probably bogus) pending stuff by doing a dummy read */
 417         (void)indirect_read(socket, I365_CSC);
 418
 419         return 0;
 420 }
 421
 422 static int pd6729_set_io_map(struct pcmcia_socket *sock,
 423                              struct pccard_io_map *io)
 424 {
 425         struct pd6729_socket *socket
 426                         = container_of(sock, struct pd6729_socket, socket);
 427         unsigned char map, ioctl;
 428
 429         map = io->map;
 430
 431         /* Check error conditions */
 432         if (map > 1) {
 433                 dev_dbg(&sock->dev, "pd6729_set_io_map with invalid map\n");
 434                 return -EINVAL;
 435         }
 436
 437         /* Turn off the window before changing anything */
 438         if (indirect_read(socket, I365_ADDRWIN) & I365_ENA_IO(map))
 439                 indirect_resetbit(socket, I365_ADDRWIN, I365_ENA_IO(map));
 440
 441         /* dev_dbg(&sock->dev, "set_io_map: Setting range to %x - %x\n",
 442            io->start, io->stop);*/
 443
 444         /* write the new values */
 445         indirect_write16(socket, I365_IO(map)+I365_W_START, io->start);
 446         indirect_write16(socket, I365_IO(map)+I365_W_STOP, io->stop);
 447
 448         ioctl = indirect_read(socket, I365_IOCTL) & ~I365_IOCTL_MASK(map);
 449
 450         if (io->flags & MAP_0WS)
 451                 ioctl |= I365_IOCTL_0WS(map);
 452         if (io->flags & MAP_16BIT)
 453                 ioctl |= I365_IOCTL_16BIT(map);
 454         if (io->flags & MAP_AUTOSZ)
 455                 ioctl |= I365_IOCTL_IOCS16(map);
 456
 457         indirect_write(socket, I365_IOCTL, ioctl);
 458
 459         /* Turn the window back on if needed */
 460         if (io->flags & MAP_ACTIVE)
 461                 indirect_setbit(socket, I365_ADDRWIN, I365_ENA_IO(map));
 462
 463         return 0;
 464 }
 465
 466 static int pd6729_set_mem_map(struct pcmcia_socket *sock,
 467                               struct pccard_mem_map *mem)
 468 {
 469         struct pd6729_socket *socket
 470                          = container_of(sock, struct pd6729_socket, socket);
 471         unsigned short base, i;
 472         unsigned char map;
 473
 474         map = mem->map;
 475         if (map > 4) {
 476                 dev_warn(&sock->dev, "invalid map requested\n");
 477                 return -EINVAL;
 478         }
 479
 480         if ((mem->res->start > mem->res->end) || (mem->speed > 1000)) {
 481                 dev_warn(&sock->dev, "invalid invalid address / speed\n");
 482                 return -EINVAL;
 483         }
 484
 485         /* Turn off the window before changing anything */
 486         if (indirect_read(socket, I365_ADDRWIN) & I365_ENA_MEM(map))
 487                 indirect_resetbit(socket, I365_ADDRWIN, I365_ENA_MEM(map));
 488
 489         /* write the start address */
 490         base = I365_MEM(map);
 491         i = (mem->res->start >> 12) & 0x0fff;
 492         if (mem->flags & MAP_16BIT)
 493                 i |= I365_MEM_16BIT;
 494         if (mem->flags & MAP_0WS)
 495                 i |= I365_MEM_0WS;
 496         indirect_write16(socket, base + I365_W_START, i);
 497
 498         /* write the stop address */
 499
 500         i = (mem->res->end >> 12) & 0x0fff;
 501         switch (to_cycles(mem->speed)) {
 502         case 0:
 503                 break;
 504         case 1:
 505                 i |= I365_MEM_WS0;
 506                 break;
 507         case 2:
 508                 i |= I365_MEM_WS1;
 509                 break;
 510         default:
 511                 i |= I365_MEM_WS1 | I365_MEM_WS0;
 512                 break;
 513         }
 514
 515         indirect_write16(socket, base + I365_W_STOP, i);
 516
 517         /* Take care of high byte */
 518         indirect_write(socket, PD67_EXT_INDEX, PD67_MEM_PAGE(map));
 519         indirect_write(socket, PD67_EXT_DATA, mem->res->start >> 24);
 520
 521         /* card start */
 522
 523         i = ((mem->card_start - mem->res->start) >> 12) & 0x3fff;
 524         if (mem->flags & MAP_WRPROT)
 525                 i |= I365_MEM_WRPROT;
 526         if (mem->flags & MAP_ATTRIB) {
 527                 /* dev_dbg(&sock->dev, "requesting attribute memory for "
 528                    "socket %i\n", socket->number);*/
 529                 i |= I365_MEM_REG;
 530         } else {
 531                 /* dev_dbg(&sock->dev, "requesting normal memory for "
 532                    "socket %i\n", socket->number);*/
 533         }
 534         indirect_write16(socket, base + I365_W_OFF, i);
 535
 536         /* Enable the window if necessary */
 537         if (mem->flags & MAP_ACTIVE)
 538                 indirect_setbit(socket, I365_ADDRWIN, I365_ENA_MEM(map));
 539
 540         return 0;
 541 }
 542
 543 static int pd6729_init(struct pcmcia_socket *sock)
 544 {
 545         int i;
 546         struct resource res = { .end = 0x0fff };
 547         pccard_io_map io = { 0, 0, 0, 0, 1 };
 548         pccard_mem_map mem = { .res = &res, };
 549
 550         pd6729_set_socket(sock, &dead_socket);
 551         for (i = 0; i < 2; i++) {
 552                 io.map = i;
 553                 pd6729_set_io_map(sock, &io);
 554         }
 555         for (i = 0; i < 5; i++) {
 556                 mem.map = i;
 557                 pd6729_set_mem_map(sock, &mem);
 558         }
 559
 560         return 0;
 561 }
 562
 563
 564 /* the pccard structure and its functions */
 565 static struct pccard_operations pd6729_operations = {
 566         .init                   = pd6729_init,
 567         .get_status             = pd6729_get_status,
 568         .set_socket             = pd6729_set_socket,
 569         .set_io_map             = pd6729_set_io_map,
 570         .set_mem_map            = pd6729_set_mem_map,
 571 };
 572
 573 static irqreturn_t pd6729_test(int irq, void *dev)
 574 {
 575         pr_devel("-> hit on irq %d\n", irq);
 576         return IRQ_HANDLED;
 577 }
 578
 579 static int pd6729_check_irq(int irq)
 580 {
 581         int ret;
 582
 583         ret = request_irq(irq, pd6729_test, IRQF_PROBE_SHARED, "x",
 584                           pd6729_test);
 585         if (ret)
 586                 return -1;
 587
 588         free_irq(irq, pd6729_test);
 589         return 0;
 590 }
 591
 592 static u_int pd6729_isa_scan(void)
 593 {
 594         u_int mask0, mask = 0;
 595         int i;
 596
 597         if (irq_mode == 1) {
 598                 printk(KERN_INFO "pd6729: PCI card interrupts, "
 599                        "PCI status changes\n");
 600                 return 0;
 601         }
 602
 603         mask0 = PD67_MASK;
 604
 605         /* just find interrupts that aren't in use */
 606         for (i = 0; i < 16; i++)
 607                 if ((mask0 & (1 << i)) && (pd6729_check_irq(i) == 0))
 608                         mask |= (1 << i);
 609
 610         printk(KERN_INFO "pd6729: ISA irqs = ");
 611         for (i = 0; i < 16; i++)
 612                 if (mask & (1<<i))
 613                         printk("%s%d", ((mask & ((1<<i)-1)) ? "," : ""), i);
 614
 615         if (mask == 0)
 616                 printk("none!");
 617         else
 618                 printk("  polling status changes.\n");
 619
 620         return mask;
 621 }
 622
 623 static int pd6729_pci_probe(struct pci_dev *dev,
 624                                       const struct pci_device_id *id)
 625 {
 626         int i, j, ret;
 627         u_int mask;
 628         char configbyte;
 629         struct pd6729_socket *socket;
 630
 631         socket = kcalloc(MAX_SOCKETS, sizeof(struct pd6729_socket),
 632                          GFP_KERNEL);
 633         if (!socket) {
 634                 dev_warn(&dev->dev, "failed to kzalloc socket.\n");
 635                 return -ENOMEM;
 636         }
 637
 638         ret = pci_enable_device(dev);
 639         if (ret) {
 640                 dev_warn(&dev->dev, "failed to enable pci_device.\n");
 641                 goto err_out_free_mem;
 642         }
 643
 644         if (!pci_resource_start(dev, 0)) {
 645                 dev_warn(&dev->dev, "refusing to load the driver as the "
 646                         "io_base is NULL.\n");
 647                 ret = -ENOMEM;
 648                 goto err_out_disable;
 649         }
 650
 651         dev_info(&dev->dev, "Cirrus PD6729 PCI to PCMCIA Bridge at 0x%llx "
 652                 "on irq %d\n",
 653                 (unsigned long long)pci_resource_start(dev, 0), dev->irq);
 654         /*
 655          * Since we have no memory BARs some firmware may not
 656          * have had PCI_COMMAND_MEMORY enabled, yet the device needs it.
 657          */
 658         pci_read_config_byte(dev, PCI_COMMAND, &configbyte);
 659         if (!(configbyte & PCI_COMMAND_MEMORY)) {
 660                 dev_dbg(&dev->dev, "pd6729: Enabling PCI_COMMAND_MEMORY.\n");
 661                 configbyte |= PCI_COMMAND_MEMORY;
 662                 pci_write_config_byte(dev, PCI_COMMAND, configbyte);
 663         }
 664
 665         ret = pci_request_regions(dev, "pd6729");
 666         if (ret) {
 667                 dev_warn(&dev->dev, "pci request region failed.\n");
 668                 goto err_out_disable;
 669         }
 670
 671         if (dev->irq == NO_IRQ)
 672                 irq_mode = 0;   /* fall back to ISA interrupt mode */
 673
 674         mask = pd6729_isa_scan();
 675         if (irq_mode == 0 && mask == 0) {
 676                 dev_warn(&dev->dev, "no ISA interrupt is available.\n");
 677                 ret = -ENODEV;
 678                 goto err_out_free_res;
 679         }
 680
 681         for (i = 0; i < MAX_SOCKETS; i++) {
 682                 socket[i].io_base = pci_resource_start(dev, 0);
 683                 socket[i].socket.features |= SS_CAP_PAGE_REGS | SS_CAP_PCCARD;
 684                 socket[i].socket.map_size = 0x1000;
 685                 socket[i].socket.irq_mask = mask;
 686                 socket[i].socket.pci_irq  = dev->irq;
 687                 socket[i].socket.cb_dev = dev;
 688                 socket[i].socket.owner = THIS_MODULE;
 689
 690                 socket[i].number = i;
 691
 692                 socket[i].socket.ops = &pd6729_operations;
 693                 socket[i].socket.resource_ops = &pccard_nonstatic_ops;
 694                 socket[i].socket.dev.parent = &dev->dev;
 695                 socket[i].socket.driver_data = &socket[i];
 696         }
 697
 698         pci_set_drvdata(dev, socket);
 699         if (irq_mode == 1) {
 700                 /* Register the interrupt handler */
 701                 ret = request_irq(dev->irq, pd6729_interrupt, IRQF_SHARED,
 702                                   "pd6729", socket);
 703                 if (ret) {
 704                         dev_err(&dev->dev, "Failed to register irq %d\n",
 705                                 dev->irq);
 706                         goto err_out_free_res;
 707                 }
 708         } else {
 709                 /* poll Card status change */
 710                 timer_setup(&socket->poll_timer, pd6729_interrupt_wrapper, 0);
 711                 mod_timer(&socket->poll_timer, jiffies + HZ);
 712         }
 713
 714         for (i = 0; i < MAX_SOCKETS; i++) {
 715                 ret = pcmcia_register_socket(&socket[i].socket);
 716                 if (ret) {
 717                         dev_warn(&dev->dev, "pcmcia_register_socket failed.\n");
 718                         for (j = 0; j < i ; j++)
 719                                 pcmcia_unregister_socket(&socket[j].socket);
 720                         goto err_out_free_res2;
 721                 }
 722         }
 723
 724         return 0;
 725
 726 err_out_free_res2:
 727         if (irq_mode == 1)
 728                 free_irq(dev->irq, socket);
 729         else
 730                 del_timer_sync(&socket->poll_timer);
 731 err_out_free_res:
 732         pci_release_regions(dev);
 733 err_out_disable:
 734         pci_disable_device(dev);
 735
 736 err_out_free_mem:
 737         kfree(socket);
 738         return ret;
 739 }
 740
 741 static void pd6729_pci_remove(struct pci_dev *dev)
 742 {
 743         int i;
 744         struct pd6729_socket *socket = pci_get_drvdata(dev);
 745
 746         for (i = 0; i < MAX_SOCKETS; i++) {
 747                 /* Turn off all interrupt sources */
 748                 indirect_write(&socket[i], I365_CSCINT, 0);
 749                 indirect_write(&socket[i], I365_INTCTL, 0);
 750
 751                 pcmcia_unregister_socket(&socket[i].socket);
 752         }
 753
 754         if (irq_mode == 1)
 755                 free_irq(dev->irq, socket);
 756         else
 757                 del_timer_sync(&socket->poll_timer);
 758         pci_release_regions(dev);
 759         pci_disable_device(dev);
 760
 761         kfree(socket);
 762 }
 763
 764 static const struct pci_device_id pd6729_pci_ids[] = {
 765         { PCI_DEVICE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6729) },
 766         { }
 767 };
 768 MODULE_DEVICE_TABLE(pci, pd6729_pci_ids);
 769
 770 static struct pci_driver pd6729_pci_driver = {
 771         .name           = "pd6729",
 772         .id_table       = pd6729_pci_ids,
 773         .probe          = pd6729_pci_probe,
 774         .remove         = pd6729_pci_remove,
 775 };
 776
 777 module_pci_driver(pd6729_pci_driver);