drivers/mfd/ioc3.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * SGI IOC3 multifunction device driver
   4  *
   5  * Copyright (C) 2018, 2019 Thomas Bogendoerfer <tbogendoerfer@suse.de>
   6  *
   7  * Based on work by:
   8  *   Stanislaw Skowronek <skylark@unaligned.org>
   9  *   Joshua Kinard <kumba@gentoo.org>
  10  *   Brent Casavant <bcasavan@sgi.com> - IOC4 master driver
  11  *   Pat Gefre <pfg@sgi.com> - IOC3 serial port IRQ demuxer
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/errno.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/mfd/core.h>
  18 #include <linux/module.h>
  19 #include <linux/pci.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/platform_data/sgi-w1.h>
  22 #include <linux/rtc/ds1685.h>
  23
  24 #include <asm/pci/bridge.h>
  25 #include <asm/sn/ioc3.h>
  26
  27 #define IOC3_IRQ_SERIAL_A       6
  28 #define IOC3_IRQ_SERIAL_B       15
  29 #define IOC3_IRQ_KBD            22
  30
  31 /* Bitmask for selecting which IRQs are level triggered */
  32 #define IOC3_LVL_MASK   (BIT(IOC3_IRQ_SERIAL_A) | BIT(IOC3_IRQ_SERIAL_B))
  33
  34 #define M48T35_REG_SIZE 32768   /* size of m48t35 registers */
  35
  36 /* 1.2 us latency timer (40 cycles at 33 MHz) */
  37 #define IOC3_LATENCY    40
  38
  39 struct ioc3_priv_data {
  40         struct irq_domain *domain;
  41         struct ioc3 __iomem *regs;
  42         struct pci_dev *pdev;
  43         int domain_irq;
  44 };
  45
  46 static void ioc3_irq_ack(struct irq_data *d)
  47 {
  48         struct ioc3_priv_data *ipd = irq_data_get_irq_chip_data(d);
  49         unsigned int hwirq = irqd_to_hwirq(d);
  50
  51         writel(BIT(hwirq), &ipd->regs->sio_ir);
  52 }
  53
  54 static void ioc3_irq_mask(struct irq_data *d)
  55 {
  56         struct ioc3_priv_data *ipd = irq_data_get_irq_chip_data(d);
  57         unsigned int hwirq = irqd_to_hwirq(d);
  58
  59         writel(BIT(hwirq), &ipd->regs->sio_iec);
  60 }
  61
  62 static void ioc3_irq_unmask(struct irq_data *d)
  63 {
  64         struct ioc3_priv_data *ipd = irq_data_get_irq_chip_data(d);
  65         unsigned int hwirq = irqd_to_hwirq(d);
  66
  67         writel(BIT(hwirq), &ipd->regs->sio_ies);
  68 }
  69
  70 static struct irq_chip ioc3_irq_chip = {
  71         .name           = "IOC3",
  72         .irq_ack        = ioc3_irq_ack,
  73         .irq_mask       = ioc3_irq_mask,
  74         .irq_unmask     = ioc3_irq_unmask,
  75 };
  76
  77 static int ioc3_irq_domain_map(struct irq_domain *d, unsigned int irq,
  78                               irq_hw_number_t hwirq)
  79 {
  80         /* Set level IRQs for every interrupt contained in IOC3_LVL_MASK */
  81         if (BIT(hwirq) & IOC3_LVL_MASK)
  82                 irq_set_chip_and_handler(irq, &ioc3_irq_chip, handle_level_irq);
  83         else
  84                 irq_set_chip_and_handler(irq, &ioc3_irq_chip, handle_edge_irq);
  85
  86         irq_set_chip_data(irq, d->host_data);
  87         return 0;
  88 }
  89
  90 static void ioc3_irq_domain_unmap(struct irq_domain *d, unsigned int irq)
  91 {
  92         irq_set_chip_and_handler(irq, NULL, NULL);
  93         irq_set_chip_data(irq, NULL);
  94 }
  95
  96 static const struct irq_domain_ops ioc3_irq_domain_ops = {
  97         .map = ioc3_irq_domain_map,
  98         .unmap = ioc3_irq_domain_unmap,
  99 };
 100
 101 static void ioc3_irq_handler(struct irq_desc *desc)
 102 {
 103         struct irq_domain *domain = irq_desc_get_handler_data(desc);
 104         struct ioc3_priv_data *ipd = domain->host_data;
 105         struct ioc3 __iomem *regs = ipd->regs;
 106         u32 pending, mask;
 107         unsigned int irq;
 108
 109         pending = readl(&regs->sio_ir);
 110         mask = readl(&regs->sio_ies);
 111         pending &= mask; /* Mask off not enabled interrupts */
 112
 113         if (pending) {
 114                 irq = irq_find_mapping(domain, __ffs(pending));
 115                 if (irq)
 116                         generic_handle_irq(irq);
 117         } else  {
 118                 spurious_interrupt();
 119         }
 120 }
 121
 122 /*
 123  * System boards/BaseIOs use more interrupt pins of the bridge ASIC
 124  * to which the IOC3 is connected. Since the IOC3 MFD driver
 125  * knows wiring of these extra pins, we use the map_irq function
 126  * to get interrupts activated
 127  */
 128 static int ioc3_map_irq(struct pci_dev *pdev, int slot, int pin)
 129 {
 130         struct pci_host_bridge *hbrg = pci_find_host_bridge(pdev->bus);
 131
 132         return hbrg->map_irq(pdev, slot, pin);
 133 }
 134
 135 static int ioc3_irq_domain_setup(struct ioc3_priv_data *ipd, int irq)
 136 {
 137         struct irq_domain *domain;
 138         struct fwnode_handle *fn;
 139
 140         fn = irq_domain_alloc_named_fwnode("IOC3");
 141         if (!fn)
 142                 goto err;
 143
 144         domain = irq_domain_create_linear(fn, 24, &ioc3_irq_domain_ops, ipd);
 145         if (!domain) {
 146                 irq_domain_free_fwnode(fn);
 147                 goto err;
 148         }
 149
 150         ipd->domain = domain;
 151
 152         irq_set_chained_handler_and_data(irq, ioc3_irq_handler, domain);
 153         ipd->domain_irq = irq;
 154         return 0;
 155
 156 err:
 157         dev_err(&ipd->pdev->dev, "irq domain setup failed\n");
 158         return -ENOMEM;
 159 }
 160
 161 static const struct resource ioc3_uarta_resources[] = {
 162         DEFINE_RES_MEM(offsetof(struct ioc3, sregs.uarta),
 163                        sizeof_field(struct ioc3, sregs.uarta)),
 164         DEFINE_RES_IRQ(IOC3_IRQ_SERIAL_A)
 165 };
 166
 167 static const struct resource ioc3_uartb_resources[] = {
 168         DEFINE_RES_MEM(offsetof(struct ioc3, sregs.uartb),
 169                        sizeof_field(struct ioc3, sregs.uartb)),
 170         DEFINE_RES_IRQ(IOC3_IRQ_SERIAL_B)
 171 };
 172
 173 static struct mfd_cell ioc3_serial_cells[] = {
 174         {
 175                 .name = "ioc3-serial8250",
 176                 .resources = ioc3_uarta_resources,
 177                 .num_resources = ARRAY_SIZE(ioc3_uarta_resources),
 178         },
 179         {
 180                 .name = "ioc3-serial8250",
 181                 .resources = ioc3_uartb_resources,
 182                 .num_resources = ARRAY_SIZE(ioc3_uartb_resources),
 183         }
 184 };
 185
 186 static int ioc3_serial_setup(struct ioc3_priv_data *ipd)
 187 {
 188         int ret;
 189
 190         /* Set gpio pins for RS232/RS422 mode selection */
 191         writel(GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL,
 192                 &ipd->regs->gpcr_s);
 193         /* Select RS232 mode for uart a */
 194         writel(0, &ipd->regs->gppr[6]);
 195         /* Select RS232 mode for uart b */
 196         writel(0, &ipd->regs->gppr[7]);
 197
 198         /* Switch both ports to 16650 mode */
 199         writel(readl(&ipd->regs->port_a.sscr) & ~SSCR_DMA_EN,
 200                &ipd->regs->port_a.sscr);
 201         writel(readl(&ipd->regs->port_b.sscr) & ~SSCR_DMA_EN,
 202                &ipd->regs->port_b.sscr);
 203         udelay(1000); /* Wait until mode switch is done */
 204
 205         ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO,
 206                               ioc3_serial_cells, ARRAY_SIZE(ioc3_serial_cells),
 207                               &ipd->pdev->resource[0], 0, ipd->domain);
 208         if (ret) {
 209                 dev_err(&ipd->pdev->dev, "Failed to add 16550 subdevs\n");
 210                 return ret;
 211         }
 212
 213         return 0;
 214 }
 215
 216 static const struct resource ioc3_kbd_resources[] = {
 217         DEFINE_RES_MEM(offsetof(struct ioc3, serio),
 218                        sizeof_field(struct ioc3, serio)),
 219         DEFINE_RES_IRQ(IOC3_IRQ_KBD)
 220 };
 221
 222 static struct mfd_cell ioc3_kbd_cells[] = {
 223         {
 224                 .name = "ioc3-kbd",
 225                 .resources = ioc3_kbd_resources,
 226                 .num_resources = ARRAY_SIZE(ioc3_kbd_resources),
 227         }
 228 };
 229
 230 static int ioc3_kbd_setup(struct ioc3_priv_data *ipd)
 231 {
 232         int ret;
 233
 234         ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO,
 235                               ioc3_kbd_cells, ARRAY_SIZE(ioc3_kbd_cells),
 236                               &ipd->pdev->resource[0], 0, ipd->domain);
 237         if (ret) {
 238                 dev_err(&ipd->pdev->dev, "Failed to add 16550 subdevs\n");
 239                 return ret;
 240         }
 241
 242         return 0;
 243 }
 244
 245 static const struct resource ioc3_eth_resources[] = {
 246         DEFINE_RES_MEM(offsetof(struct ioc3, eth),
 247                        sizeof_field(struct ioc3, eth)),
 248         DEFINE_RES_MEM(offsetof(struct ioc3, ssram),
 249                        sizeof_field(struct ioc3, ssram)),
 250         DEFINE_RES_IRQ(0)
 251 };
 252
 253 static const struct resource ioc3_w1_resources[] = {
 254         DEFINE_RES_MEM(offsetof(struct ioc3, mcr),
 255                        sizeof_field(struct ioc3, mcr)),
 256 };
 257 static struct sgi_w1_platform_data ioc3_w1_platform_data;
 258
 259 static struct mfd_cell ioc3_eth_cells[] = {
 260         {
 261                 .name = "ioc3-eth",
 262                 .resources = ioc3_eth_resources,
 263                 .num_resources = ARRAY_SIZE(ioc3_eth_resources),
 264         },
 265         {
 266                 .name = "sgi_w1",
 267                 .resources = ioc3_w1_resources,
 268                 .num_resources = ARRAY_SIZE(ioc3_w1_resources),
 269                 .platform_data = &ioc3_w1_platform_data,
 270                 .pdata_size = sizeof(ioc3_w1_platform_data),
 271         }
 272 };
 273
 274 static int ioc3_eth_setup(struct ioc3_priv_data *ipd)
 275 {
 276         int ret;
 277
 278         /* Enable One-Wire bus */
 279         writel(GPCR_MLAN_EN, &ipd->regs->gpcr_s);
 280
 281         /* Generate unique identifier */
 282         snprintf(ioc3_w1_platform_data.dev_id,
 283                  sizeof(ioc3_w1_platform_data.dev_id), "ioc3-%012llx",
 284                  ipd->pdev->resource->start);
 285
 286         ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO,
 287                               ioc3_eth_cells, ARRAY_SIZE(ioc3_eth_cells),
 288                               &ipd->pdev->resource[0], ipd->pdev->irq, NULL);
 289         if (ret) {
 290                 dev_err(&ipd->pdev->dev, "Failed to add ETH/W1 subdev\n");
 291                 return ret;
 292         }
 293
 294         return 0;
 295 }
 296
 297 static const struct resource ioc3_m48t35_resources[] = {
 298         DEFINE_RES_MEM(IOC3_BYTEBUS_DEV0, M48T35_REG_SIZE)
 299 };
 300
 301 static struct mfd_cell ioc3_m48t35_cells[] = {
 302         {
 303                 .name = "rtc-m48t35",
 304                 .resources = ioc3_m48t35_resources,
 305                 .num_resources = ARRAY_SIZE(ioc3_m48t35_resources),
 306         }
 307 };
 308
 309 static int ioc3_m48t35_setup(struct ioc3_priv_data *ipd)
 310 {
 311         int ret;
 312
 313         ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO,
 314                               ioc3_m48t35_cells, ARRAY_SIZE(ioc3_m48t35_cells),
 315                               &ipd->pdev->resource[0], 0, ipd->domain);
 316         if (ret)
 317                 dev_err(&ipd->pdev->dev, "Failed to add M48T35 subdev\n");
 318
 319         return ret;
 320 }
 321
 322 static struct ds1685_rtc_platform_data ip30_rtc_platform_data = {
 323         .bcd_mode = false,
 324         .no_irq = false,
 325         .uie_unsupported = true,
 326         .access_type = ds1685_reg_indirect,
 327 };
 328
 329 static const struct resource ioc3_rtc_ds1685_resources[] = {
 330         DEFINE_RES_MEM(IOC3_BYTEBUS_DEV1, 1),
 331         DEFINE_RES_MEM(IOC3_BYTEBUS_DEV2, 1),
 332         DEFINE_RES_IRQ(0)
 333 };
 334
 335 static struct mfd_cell ioc3_ds1685_cells[] = {
 336         {
 337                 .name = "rtc-ds1685",
 338                 .resources = ioc3_rtc_ds1685_resources,
 339                 .num_resources = ARRAY_SIZE(ioc3_rtc_ds1685_resources),
 340                 .platform_data = &ip30_rtc_platform_data,
 341                 .pdata_size = sizeof(ip30_rtc_platform_data),
 342                 .id = PLATFORM_DEVID_NONE,
 343         }
 344 };
 345
 346 static int ioc3_ds1685_setup(struct ioc3_priv_data *ipd)
 347 {
 348         int ret, irq;
 349
 350         irq = ioc3_map_irq(ipd->pdev, 6, 0);
 351
 352         ret = mfd_add_devices(&ipd->pdev->dev, 0, ioc3_ds1685_cells,
 353                               ARRAY_SIZE(ioc3_ds1685_cells),
 354                               &ipd->pdev->resource[0], irq, NULL);
 355         if (ret)
 356                 dev_err(&ipd->pdev->dev, "Failed to add DS1685 subdev\n");
 357
 358         return ret;
 359 };
 360
 361
 362 static const struct resource ioc3_leds_resources[] = {
 363         DEFINE_RES_MEM(offsetof(struct ioc3, gppr[0]),
 364                        sizeof_field(struct ioc3, gppr[0])),
 365         DEFINE_RES_MEM(offsetof(struct ioc3, gppr[1]),
 366                        sizeof_field(struct ioc3, gppr[1])),
 367 };
 368
 369 static struct mfd_cell ioc3_led_cells[] = {
 370         {
 371                 .name = "ip30-leds",
 372                 .resources = ioc3_leds_resources,
 373                 .num_resources = ARRAY_SIZE(ioc3_leds_resources),
 374                 .id = PLATFORM_DEVID_NONE,
 375         }
 376 };
 377
 378 static int ioc3_led_setup(struct ioc3_priv_data *ipd)
 379 {
 380         int ret;
 381
 382         ret = mfd_add_devices(&ipd->pdev->dev, 0, ioc3_led_cells,
 383                               ARRAY_SIZE(ioc3_led_cells),
 384                               &ipd->pdev->resource[0], 0, ipd->domain);
 385         if (ret)
 386                 dev_err(&ipd->pdev->dev, "Failed to add LED subdev\n");
 387
 388         return ret;
 389 }
 390
 391 static int ip27_baseio_setup(struct ioc3_priv_data *ipd)
 392 {
 393         int ret, io_irq;
 394
 395         io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn),
 396                               PCI_INTERRUPT_INTB);
 397         ret = ioc3_irq_domain_setup(ipd, io_irq);
 398         if (ret)
 399                 return ret;
 400
 401         ret = ioc3_eth_setup(ipd);
 402         if (ret)
 403                 return ret;
 404
 405         ret = ioc3_serial_setup(ipd);
 406         if (ret)
 407                 return ret;
 408
 409         return ioc3_m48t35_setup(ipd);
 410 }
 411
 412 static int ip27_baseio6g_setup(struct ioc3_priv_data *ipd)
 413 {
 414         int ret, io_irq;
 415
 416         io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn),
 417                               PCI_INTERRUPT_INTB);
 418         ret = ioc3_irq_domain_setup(ipd, io_irq);
 419         if (ret)
 420                 return ret;
 421
 422         ret = ioc3_eth_setup(ipd);
 423         if (ret)
 424                 return ret;
 425
 426         ret = ioc3_serial_setup(ipd);
 427         if (ret)
 428                 return ret;
 429
 430         ret = ioc3_m48t35_setup(ipd);
 431         if (ret)
 432                 return ret;
 433
 434         return ioc3_kbd_setup(ipd);
 435 }
 436
 437 static int ip27_mio_setup(struct ioc3_priv_data *ipd)
 438 {
 439         int ret;
 440
 441         ret = ioc3_irq_domain_setup(ipd, ipd->pdev->irq);
 442         if (ret)
 443                 return ret;
 444
 445         ret = ioc3_serial_setup(ipd);
 446         if (ret)
 447                 return ret;
 448
 449         return ioc3_kbd_setup(ipd);
 450 }
 451
 452 static int ip30_sysboard_setup(struct ioc3_priv_data *ipd)
 453 {
 454         int ret, io_irq;
 455
 456         io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn),
 457                               PCI_INTERRUPT_INTB);
 458         ret = ioc3_irq_domain_setup(ipd, io_irq);
 459         if (ret)
 460                 return ret;
 461
 462         ret = ioc3_eth_setup(ipd);
 463         if (ret)
 464                 return ret;
 465
 466         ret = ioc3_serial_setup(ipd);
 467         if (ret)
 468                 return ret;
 469
 470         ret = ioc3_kbd_setup(ipd);
 471         if (ret)
 472                 return ret;
 473
 474         ret = ioc3_ds1685_setup(ipd);
 475         if (ret)
 476                 return ret;
 477
 478         return ioc3_led_setup(ipd);
 479 }
 480
 481 static int ioc3_menet_setup(struct ioc3_priv_data *ipd)
 482 {
 483         int ret, io_irq;
 484
 485         io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn),
 486                               PCI_INTERRUPT_INTB);
 487         ret = ioc3_irq_domain_setup(ipd, io_irq);
 488         if (ret)
 489                 return ret;
 490
 491         ret = ioc3_eth_setup(ipd);
 492         if (ret)
 493                 return ret;
 494
 495         return ioc3_serial_setup(ipd);
 496 }
 497
 498 static int ioc3_menet4_setup(struct ioc3_priv_data *ipd)
 499 {
 500         return ioc3_eth_setup(ipd);
 501 }
 502
 503 static int ioc3_cad_duo_setup(struct ioc3_priv_data *ipd)
 504 {
 505         int ret, io_irq;
 506
 507         io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn),
 508                               PCI_INTERRUPT_INTB);
 509         ret = ioc3_irq_domain_setup(ipd, io_irq);
 510         if (ret)
 511                 return ret;
 512
 513         ret = ioc3_eth_setup(ipd);
 514         if (ret)
 515                 return ret;
 516
 517         return ioc3_kbd_setup(ipd);
 518 }
 519
 520 /* Helper macro for filling ioc3_info array */
 521 #define IOC3_SID(_name, _sid, _setup) \
 522         {                                                                  \
 523                 .name = _name,                                             \
 524                 .sid = PCI_VENDOR_ID_SGI | (IOC3_SUBSYS_ ## _sid << 16),   \
 525                 .setup = _setup,                                           \
 526         }
 527
 528 static struct {
 529         const char *name;
 530         u32 sid;
 531         int (*setup)(struct ioc3_priv_data *ipd);
 532 } ioc3_infos[] = {
 533         IOC3_SID("IP27 BaseIO6G", IP27_BASEIO6G, &ip27_baseio6g_setup),
 534         IOC3_SID("IP27 MIO", IP27_MIO, &ip27_mio_setup),
 535         IOC3_SID("IP27 BaseIO", IP27_BASEIO, &ip27_baseio_setup),
 536         IOC3_SID("IP29 System Board", IP29_SYSBOARD, &ip27_baseio6g_setup),
 537         IOC3_SID("IP30 System Board", IP30_SYSBOARD, &ip30_sysboard_setup),
 538         IOC3_SID("MENET", MENET, &ioc3_menet_setup),
 539         IOC3_SID("MENET4", MENET4, &ioc3_menet4_setup)
 540 };
 541 #undef IOC3_SID
 542
 543 static int ioc3_setup(struct ioc3_priv_data *ipd)
 544 {
 545         u32 sid;
 546         int i;
 547
 548         /* Clear IRQs */
 549         writel(~0, &ipd->regs->sio_iec);
 550         writel(~0, &ipd->regs->sio_ir);
 551         writel(0, &ipd->regs->eth.eier);
 552         writel(~0, &ipd->regs->eth.eisr);
 553
 554         /* Read subsystem vendor id and subsystem id */
 555         pci_read_config_dword(ipd->pdev, PCI_SUBSYSTEM_VENDOR_ID, &sid);
 556
 557         for (i = 0; i < ARRAY_SIZE(ioc3_infos); i++)
 558                 if (sid == ioc3_infos[i].sid) {
 559                         pr_info("ioc3: %s\n", ioc3_infos[i].name);
 560                         return ioc3_infos[i].setup(ipd);
 561                 }
 562
 563         /* Treat everything not identified by PCI subid as CAD DUO */
 564         pr_info("ioc3: CAD DUO\n");
 565         return ioc3_cad_duo_setup(ipd);
 566 }
 567
 568 static int ioc3_mfd_probe(struct pci_dev *pdev,
 569                           const struct pci_device_id *pci_id)
 570 {
 571         struct ioc3_priv_data *ipd;
 572         struct ioc3 __iomem *regs;
 573         int ret;
 574
 575         ret = pci_enable_device(pdev);
 576         if (ret)
 577                 return ret;
 578
 579         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, IOC3_LATENCY);
 580         pci_set_master(pdev);
 581
 582         ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 583         if (ret) {
 584                 pr_err("%s: No usable DMA configuration, aborting.\n",
 585                        pci_name(pdev));
 586                 goto out_disable_device;
 587         }
 588
 589         /* Set up per-IOC3 data */
 590         ipd = devm_kzalloc(&pdev->dev, sizeof(struct ioc3_priv_data),
 591                            GFP_KERNEL);
 592         if (!ipd) {
 593                 ret = -ENOMEM;
 594                 goto out_disable_device;
 595         }
 596         ipd->pdev = pdev;
 597
 598         /*
 599          * Map all IOC3 registers.  These are shared between subdevices
 600          * so the main IOC3 module manages them.
 601          */
 602         regs = pci_ioremap_bar(pdev, 0);
 603         if (!regs) {
 604                 dev_warn(&pdev->dev, "ioc3: Unable to remap PCI BAR for %s.\n",
 605                          pci_name(pdev));
 606                 ret = -ENOMEM;
 607                 goto out_disable_device;
 608         }
 609         ipd->regs = regs;
 610
 611         /* Track PCI-device specific data */
 612         pci_set_drvdata(pdev, ipd);
 613
 614         ret = ioc3_setup(ipd);
 615         if (ret) {
 616                 /* Remove all already added MFD devices */
 617                 mfd_remove_devices(&ipd->pdev->dev);
 618                 if (ipd->domain) {
 619                         struct fwnode_handle *fn = ipd->domain->fwnode;
 620
 621                         irq_domain_remove(ipd->domain);
 622                         irq_domain_free_fwnode(fn);
 623                         free_irq(ipd->domain_irq, (void *)ipd);
 624                 }
 625                 pci_iounmap(pdev, regs);
 626                 goto out_disable_device;
 627         }
 628
 629         return 0;
 630
 631 out_disable_device:
 632         pci_disable_device(pdev);
 633         return ret;
 634 }
 635
 636 static void ioc3_mfd_remove(struct pci_dev *pdev)
 637 {
 638         struct ioc3_priv_data *ipd;
 639
 640         ipd = pci_get_drvdata(pdev);
 641
 642         /* Clear and disable all IRQs */
 643         writel(~0, &ipd->regs->sio_iec);
 644         writel(~0, &ipd->regs->sio_ir);
 645
 646         /* Release resources */
 647         mfd_remove_devices(&ipd->pdev->dev);
 648         if (ipd->domain) {
 649                 struct fwnode_handle *fn = ipd->domain->fwnode;
 650
 651                 irq_domain_remove(ipd->domain);
 652                 irq_domain_free_fwnode(fn);
 653                 free_irq(ipd->domain_irq, (void *)ipd);
 654         }
 655         pci_iounmap(pdev, ipd->regs);
 656         pci_disable_device(pdev);
 657 }
 658
 659 static struct pci_device_id ioc3_mfd_id_table[] = {
 660         { PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID },
 661         { 0, },
 662 };
 663 MODULE_DEVICE_TABLE(pci, ioc3_mfd_id_table);
 664
 665 static struct pci_driver ioc3_mfd_driver = {
 666         .name = "IOC3",
 667         .id_table = ioc3_mfd_id_table,
 668         .probe = ioc3_mfd_probe,
 669         .remove = ioc3_mfd_remove,
 670 };
 671
 672 module_pci_driver(ioc3_mfd_driver);
 673
 674 MODULE_AUTHOR("Thomas Bogendoerfer <tbogendoerfer@suse.de>");
 675 MODULE_DESCRIPTION("SGI IOC3 MFD driver");
 676 MODULE_LICENSE("GPL v2");