linux/drivers/mfd/sta2x11-mfd.c
<<
>>
Prefs
   1/*
   2 * Copyright (c) 2009-2011 Wind River Systems, Inc.
   3 * Copyright (c) 2011 ST Microelectronics (Alessandro Rubini, Davide Ciminaghi)
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License version 2 as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12 * See the GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  17 *
  18 */
  19
  20#include <linux/kernel.h>
  21#include <linux/module.h>
  22#include <linux/spinlock.h>
  23#include <linux/errno.h>
  24#include <linux/device.h>
  25#include <linux/slab.h>
  26#include <linux/list.h>
  27#include <linux/io.h>
  28#include <linux/ioport.h>
  29#include <linux/pci.h>
  30#include <linux/seq_file.h>
  31#include <linux/platform_device.h>
  32#include <linux/mfd/core.h>
  33#include <linux/mfd/sta2x11-mfd.h>
  34#include <linux/regmap.h>
  35
  36#include <asm/sta2x11.h>
  37
  38static inline int __reg_within_range(unsigned int r,
  39                                     unsigned int start,
  40                                     unsigned int end)
  41{
  42        return ((r >= start) && (r <= end));
  43}
  44
  45/* This describes STA2X11 MFD chip for us, we may have several */
  46struct sta2x11_mfd {
  47        struct sta2x11_instance *instance;
  48        struct regmap *regmap[sta2x11_n_mfd_plat_devs];
  49        spinlock_t lock[sta2x11_n_mfd_plat_devs];
  50        struct list_head list;
  51        void __iomem *regs[sta2x11_n_mfd_plat_devs];
  52};
  53
  54static LIST_HEAD(sta2x11_mfd_list);
  55
  56/* Three functions to act on the list */
  57static struct sta2x11_mfd *sta2x11_mfd_find(struct pci_dev *pdev)
  58{
  59        struct sta2x11_instance *instance;
  60        struct sta2x11_mfd *mfd;
  61
  62        if (!pdev && !list_empty(&sta2x11_mfd_list)) {
  63                pr_warning("%s: Unspecified device, "
  64                            "using first instance\n", __func__);
  65                return list_entry(sta2x11_mfd_list.next,
  66                                  struct sta2x11_mfd, list);
  67        }
  68
  69        instance = sta2x11_get_instance(pdev);
  70        if (!instance)
  71                return NULL;
  72        list_for_each_entry(mfd, &sta2x11_mfd_list, list) {
  73                if (mfd->instance == instance)
  74                        return mfd;
  75        }
  76        return NULL;
  77}
  78
  79static int sta2x11_mfd_add(struct pci_dev *pdev, gfp_t flags)
  80{
  81        int i;
  82        struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev);
  83        struct sta2x11_instance *instance;
  84
  85        if (mfd)
  86                return -EBUSY;
  87        instance = sta2x11_get_instance(pdev);
  88        if (!instance)
  89                return -EINVAL;
  90        mfd = kzalloc(sizeof(*mfd), flags);
  91        if (!mfd)
  92                return -ENOMEM;
  93        INIT_LIST_HEAD(&mfd->list);
  94        for (i = 0; i < ARRAY_SIZE(mfd->lock); i++)
  95                spin_lock_init(&mfd->lock[i]);
  96        mfd->instance = instance;
  97        list_add(&mfd->list, &sta2x11_mfd_list);
  98        return 0;
  99}
 100
 101/* This function is exported and is not expected to fail */
 102u32 __sta2x11_mfd_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val,
 103                       enum sta2x11_mfd_plat_dev index)
 104{
 105        struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev);
 106        u32 r;
 107        unsigned long flags;
 108        void __iomem *regs;
 109
 110        if (!mfd) {
 111                dev_warn(&pdev->dev, ": can't access sctl regs\n");
 112                return 0;
 113        }
 114
 115        regs = mfd->regs[index];
 116        if (!regs) {
 117                dev_warn(&pdev->dev, ": system ctl not initialized\n");
 118                return 0;
 119        }
 120        spin_lock_irqsave(&mfd->lock[index], flags);
 121        r = readl(regs + reg);
 122        r &= ~mask;
 123        r |= val;
 124        if (mask)
 125                writel(r, regs + reg);
 126        spin_unlock_irqrestore(&mfd->lock[index], flags);
 127        return r;
 128}
 129EXPORT_SYMBOL(__sta2x11_mfd_mask);
 130
 131int sta2x11_mfd_get_regs_data(struct platform_device *dev,
 132                              enum sta2x11_mfd_plat_dev index,
 133                              void __iomem **regs,
 134                              spinlock_t **lock)
 135{
 136        struct pci_dev *pdev = *(struct pci_dev **)(dev->dev.platform_data);
 137        struct sta2x11_mfd *mfd;
 138
 139        if (!pdev)
 140                return -ENODEV;
 141        mfd = sta2x11_mfd_find(pdev);
 142        if (!mfd)
 143                return -ENODEV;
 144        if (index >= sta2x11_n_mfd_plat_devs)
 145                return -ENODEV;
 146        *regs = mfd->regs[index];
 147        *lock = &mfd->lock[index];
 148        pr_debug("%s %d *regs = %p\n", __func__, __LINE__, *regs);
 149        return *regs ? 0 : -ENODEV;
 150}
 151EXPORT_SYMBOL(sta2x11_mfd_get_regs_data);
 152
 153/*
 154 * Special sta2x11-mfd regmap lock/unlock functions
 155 */
 156
 157static void sta2x11_regmap_lock(void *__lock)
 158{
 159        spinlock_t *lock = __lock;
 160        spin_lock(lock);
 161}
 162
 163static void sta2x11_regmap_unlock(void *__lock)
 164{
 165        spinlock_t *lock = __lock;
 166        spin_unlock(lock);
 167}
 168
 169/* OTP (one time programmable registers do not require locking */
 170static void sta2x11_regmap_nolock(void *__lock)
 171{
 172}
 173
 174static const char *sta2x11_mfd_names[sta2x11_n_mfd_plat_devs] = {
 175        [sta2x11_sctl] = STA2X11_MFD_SCTL_NAME,
 176        [sta2x11_apbreg] = STA2X11_MFD_APBREG_NAME,
 177        [sta2x11_apb_soc_regs] = STA2X11_MFD_APB_SOC_REGS_NAME,
 178        [sta2x11_scr] = STA2X11_MFD_SCR_NAME,
 179};
 180
 181static bool sta2x11_sctl_writeable_reg(struct device *dev, unsigned int reg)
 182{
 183        return !__reg_within_range(reg, SCTL_SCPCIECSBRST, SCTL_SCRSTSTA);
 184}
 185
 186static struct regmap_config sta2x11_sctl_regmap_config = {
 187        .reg_bits = 32,
 188        .reg_stride = 4,
 189        .val_bits = 32,
 190        .lock = sta2x11_regmap_lock,
 191        .unlock = sta2x11_regmap_unlock,
 192        .max_register = SCTL_SCRSTSTA,
 193        .writeable_reg = sta2x11_sctl_writeable_reg,
 194};
 195
 196static bool sta2x11_scr_readable_reg(struct device *dev, unsigned int reg)
 197{
 198        return (reg == STA2X11_SECR_CR) ||
 199                __reg_within_range(reg, STA2X11_SECR_FVR0, STA2X11_SECR_FVR1);
 200}
 201
 202static bool sta2x11_scr_writeable_reg(struct device *dev, unsigned int reg)
 203{
 204        return false;
 205}
 206
 207static struct regmap_config sta2x11_scr_regmap_config = {
 208        .reg_bits = 32,
 209        .reg_stride = 4,
 210        .val_bits = 32,
 211        .lock = sta2x11_regmap_nolock,
 212        .unlock = sta2x11_regmap_nolock,
 213        .max_register = STA2X11_SECR_FVR1,
 214        .readable_reg = sta2x11_scr_readable_reg,
 215        .writeable_reg = sta2x11_scr_writeable_reg,
 216};
 217
 218static bool sta2x11_apbreg_readable_reg(struct device *dev, unsigned int reg)
 219{
 220        /* Two blocks (CAN and MLB, SARAC) 0x100 bytes apart */
 221        if (reg >= APBREG_BSR_SARAC)
 222                reg -= APBREG_BSR_SARAC;
 223        switch (reg) {
 224        case APBREG_BSR:
 225        case APBREG_PAER:
 226        case APBREG_PWAC:
 227        case APBREG_PRAC:
 228        case APBREG_PCG:
 229        case APBREG_PUR:
 230        case APBREG_EMU_PCG:
 231                return true;
 232        default:
 233                return false;
 234        }
 235}
 236
 237static bool sta2x11_apbreg_writeable_reg(struct device *dev, unsigned int reg)
 238{
 239        if (reg >= APBREG_BSR_SARAC)
 240                reg -= APBREG_BSR_SARAC;
 241        if (!sta2x11_apbreg_readable_reg(dev, reg))
 242                return false;
 243        return reg != APBREG_PAER;
 244}
 245
 246static struct regmap_config sta2x11_apbreg_regmap_config = {
 247        .reg_bits = 32,
 248        .reg_stride = 4,
 249        .val_bits = 32,
 250        .lock = sta2x11_regmap_lock,
 251        .unlock = sta2x11_regmap_unlock,
 252        .max_register = APBREG_EMU_PCG_SARAC,
 253        .readable_reg = sta2x11_apbreg_readable_reg,
 254        .writeable_reg = sta2x11_apbreg_writeable_reg,
 255};
 256
 257static bool sta2x11_apb_soc_regs_readable_reg(struct device *dev,
 258                                              unsigned int reg)
 259{
 260        return reg <= PCIE_SoC_INT_ROUTER_STATUS3_REG ||
 261                __reg_within_range(reg, DMA_IP_CTRL_REG, SPARE3_RESERVED) ||
 262                __reg_within_range(reg, MASTER_LOCK_REG,
 263                                   SYSTEM_CONFIG_STATUS_REG) ||
 264                reg == MSP_CLK_CTRL_REG ||
 265                __reg_within_range(reg, COMPENSATION_REG1, TEST_CTL_REG);
 266}
 267
 268static bool sta2x11_apb_soc_regs_writeable_reg(struct device *dev,
 269                                               unsigned int reg)
 270{
 271        if (!sta2x11_apb_soc_regs_readable_reg(dev, reg))
 272                return false;
 273        switch (reg) {
 274        case PCIE_COMMON_CLOCK_CONFIG_0_4_0:
 275        case SYSTEM_CONFIG_STATUS_REG:
 276        case COMPENSATION_REG1:
 277        case PCIE_SoC_INT_ROUTER_STATUS0_REG...PCIE_SoC_INT_ROUTER_STATUS3_REG:
 278        case PCIE_PM_STATUS_0_PORT_0_4...PCIE_PM_STATUS_7_0_EP4:
 279                return false;
 280        default:
 281                return true;
 282        }
 283}
 284
 285static struct regmap_config sta2x11_apb_soc_regs_regmap_config = {
 286        .reg_bits = 32,
 287        .reg_stride = 4,
 288        .val_bits = 32,
 289        .lock = sta2x11_regmap_lock,
 290        .unlock = sta2x11_regmap_unlock,
 291        .max_register = TEST_CTL_REG,
 292        .readable_reg = sta2x11_apb_soc_regs_readable_reg,
 293        .writeable_reg = sta2x11_apb_soc_regs_writeable_reg,
 294};
 295
 296static struct regmap_config *
 297sta2x11_mfd_regmap_configs[sta2x11_n_mfd_plat_devs] = {
 298        [sta2x11_sctl] = &sta2x11_sctl_regmap_config,
 299        [sta2x11_apbreg] = &sta2x11_apbreg_regmap_config,
 300        [sta2x11_apb_soc_regs] = &sta2x11_apb_soc_regs_regmap_config,
 301        [sta2x11_scr] = &sta2x11_scr_regmap_config,
 302};
 303
 304/* Probe for the four platform devices */
 305
 306static int sta2x11_mfd_platform_probe(struct platform_device *dev,
 307                                      enum sta2x11_mfd_plat_dev index)
 308{
 309        struct pci_dev **pdev;
 310        struct sta2x11_mfd *mfd;
 311        struct resource *res;
 312        const char *name = sta2x11_mfd_names[index];
 313        struct regmap_config *regmap_config = sta2x11_mfd_regmap_configs[index];
 314
 315        pdev = dev->dev.platform_data;
 316        mfd = sta2x11_mfd_find(*pdev);
 317        if (!mfd)
 318                return -ENODEV;
 319        if (!regmap_config)
 320                return -ENODEV;
 321
 322        res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 323        if (!res)
 324                return -ENOMEM;
 325
 326        if (!request_mem_region(res->start, resource_size(res), name))
 327                return -EBUSY;
 328
 329        mfd->regs[index] = ioremap(res->start, resource_size(res));
 330        if (!mfd->regs[index]) {
 331                release_mem_region(res->start, resource_size(res));
 332                return -ENOMEM;
 333        }
 334        regmap_config->lock_arg = &mfd->lock;
 335        /*
 336           No caching, registers could be reached both via regmap and via
 337           void __iomem *
 338        */
 339        regmap_config->cache_type = REGCACHE_NONE;
 340        mfd->regmap[index] = devm_regmap_init_mmio(&dev->dev, mfd->regs[index],
 341                                                   regmap_config);
 342        WARN_ON(!mfd->regmap[index]);
 343
 344        return 0;
 345}
 346
 347static int sta2x11_sctl_probe(struct platform_device *dev)
 348{
 349        return sta2x11_mfd_platform_probe(dev, sta2x11_sctl);
 350}
 351
 352static int sta2x11_apbreg_probe(struct platform_device *dev)
 353{
 354        return sta2x11_mfd_platform_probe(dev, sta2x11_apbreg);
 355}
 356
 357static int sta2x11_apb_soc_regs_probe(struct platform_device *dev)
 358{
 359        return sta2x11_mfd_platform_probe(dev, sta2x11_apb_soc_regs);
 360}
 361
 362static int sta2x11_scr_probe(struct platform_device *dev)
 363{
 364        return sta2x11_mfd_platform_probe(dev, sta2x11_scr);
 365}
 366
 367/* The three platform drivers */
 368static struct platform_driver sta2x11_sctl_platform_driver = {
 369        .driver = {
 370                .name   = STA2X11_MFD_SCTL_NAME,
 371                .owner  = THIS_MODULE,
 372        },
 373        .probe          = sta2x11_sctl_probe,
 374};
 375
 376static int __init sta2x11_sctl_init(void)
 377{
 378        pr_info("%s\n", __func__);
 379        return platform_driver_register(&sta2x11_sctl_platform_driver);
 380}
 381
 382static struct platform_driver sta2x11_platform_driver = {
 383        .driver = {
 384                .name   = STA2X11_MFD_APBREG_NAME,
 385                .owner  = THIS_MODULE,
 386        },
 387        .probe          = sta2x11_apbreg_probe,
 388};
 389
 390static int __init sta2x11_apbreg_init(void)
 391{
 392        pr_info("%s\n", __func__);
 393        return platform_driver_register(&sta2x11_platform_driver);
 394}
 395
 396static struct platform_driver sta2x11_apb_soc_regs_platform_driver = {
 397        .driver = {
 398                .name   = STA2X11_MFD_APB_SOC_REGS_NAME,
 399                .owner  = THIS_MODULE,
 400        },
 401        .probe          = sta2x11_apb_soc_regs_probe,
 402};
 403
 404static int __init sta2x11_apb_soc_regs_init(void)
 405{
 406        pr_info("%s\n", __func__);
 407        return platform_driver_register(&sta2x11_apb_soc_regs_platform_driver);
 408}
 409
 410static struct platform_driver sta2x11_scr_platform_driver = {
 411        .driver = {
 412                .name = STA2X11_MFD_SCR_NAME,
 413                .owner = THIS_MODULE,
 414        },
 415        .probe = sta2x11_scr_probe,
 416};
 417
 418static int __init sta2x11_scr_init(void)
 419{
 420        pr_info("%s\n", __func__);
 421        return platform_driver_register(&sta2x11_scr_platform_driver);
 422}
 423
 424
 425/*
 426 * What follows are the PCI devices that host the above pdevs.
 427 * Each logic block is 4kB and they are all consecutive: we use this info.
 428 */
 429
 430/* Mfd 0 device */
 431
 432/* Mfd 0, Bar 0 */
 433enum mfd0_bar0_cells {
 434        STA2X11_GPIO_0 = 0,
 435        STA2X11_GPIO_1,
 436        STA2X11_GPIO_2,
 437        STA2X11_GPIO_3,
 438        STA2X11_SCTL,
 439        STA2X11_SCR,
 440        STA2X11_TIME,
 441};
 442/* Mfd 0 , Bar 1 */
 443enum mfd0_bar1_cells {
 444        STA2X11_APBREG = 0,
 445};
 446#define CELL_4K(_name, _cell) { \
 447                .name = _name, \
 448                .start = _cell * 4096, .end = _cell * 4096 + 4095, \
 449                .flags = IORESOURCE_MEM, \
 450                }
 451
 452static const struct resource gpio_resources[] = {
 453        {
 454                /* 4 consecutive cells, 1 driver */
 455                .name = STA2X11_MFD_GPIO_NAME,
 456                .start = 0,
 457                .end = (4 * 4096) - 1,
 458                .flags = IORESOURCE_MEM,
 459        }
 460};
 461static const struct resource sctl_resources[] = {
 462        CELL_4K(STA2X11_MFD_SCTL_NAME, STA2X11_SCTL),
 463};
 464static const struct resource scr_resources[] = {
 465        CELL_4K(STA2X11_MFD_SCR_NAME, STA2X11_SCR),
 466};
 467static const struct resource time_resources[] = {
 468        CELL_4K(STA2X11_MFD_TIME_NAME, STA2X11_TIME),
 469};
 470
 471static const struct resource apbreg_resources[] = {
 472        CELL_4K(STA2X11_MFD_APBREG_NAME, STA2X11_APBREG),
 473};
 474
 475#define DEV(_name, _r) \
 476        { .name = _name, .num_resources = ARRAY_SIZE(_r), .resources = _r, }
 477
 478static struct mfd_cell sta2x11_mfd0_bar0[] = {
 479        /* offset 0: we add pdata later */
 480        DEV(STA2X11_MFD_GPIO_NAME, gpio_resources),
 481        DEV(STA2X11_MFD_SCTL_NAME, sctl_resources),
 482        DEV(STA2X11_MFD_SCR_NAME,  scr_resources),
 483        DEV(STA2X11_MFD_TIME_NAME, time_resources),
 484};
 485
 486static struct mfd_cell sta2x11_mfd0_bar1[] = {
 487        DEV(STA2X11_MFD_APBREG_NAME, apbreg_resources),
 488};
 489
 490/* Mfd 1 devices */
 491
 492/* Mfd 1, Bar 0 */
 493enum mfd1_bar0_cells {
 494        STA2X11_VIC = 0,
 495};
 496
 497/* Mfd 1, Bar 1 */
 498enum mfd1_bar1_cells {
 499        STA2X11_APB_SOC_REGS = 0,
 500};
 501
 502static const struct resource vic_resources[] = {
 503        CELL_4K(STA2X11_MFD_VIC_NAME, STA2X11_VIC),
 504};
 505
 506static const struct resource apb_soc_regs_resources[] = {
 507        CELL_4K(STA2X11_MFD_APB_SOC_REGS_NAME, STA2X11_APB_SOC_REGS),
 508};
 509
 510static struct mfd_cell sta2x11_mfd1_bar0[] = {
 511        DEV(STA2X11_MFD_VIC_NAME, vic_resources),
 512};
 513
 514static struct mfd_cell sta2x11_mfd1_bar1[] = {
 515        DEV(STA2X11_MFD_APB_SOC_REGS_NAME, apb_soc_regs_resources),
 516};
 517
 518
 519static int sta2x11_mfd_suspend(struct pci_dev *pdev, pm_message_t state)
 520{
 521        pci_save_state(pdev);
 522        pci_disable_device(pdev);
 523        pci_set_power_state(pdev, pci_choose_state(pdev, state));
 524
 525        return 0;
 526}
 527
 528static int sta2x11_mfd_resume(struct pci_dev *pdev)
 529{
 530        int err;
 531
 532        pci_set_power_state(pdev, 0);
 533        err = pci_enable_device(pdev);
 534        if (err)
 535                return err;
 536        pci_restore_state(pdev);
 537
 538        return 0;
 539}
 540
 541struct sta2x11_mfd_bar_setup_data {
 542        struct mfd_cell *cells;
 543        int ncells;
 544};
 545
 546struct sta2x11_mfd_setup_data {
 547        struct sta2x11_mfd_bar_setup_data bars[2];
 548};
 549
 550#define STA2X11_MFD0 0
 551#define STA2X11_MFD1 1
 552
 553static struct sta2x11_mfd_setup_data mfd_setup_data[] = {
 554        /* Mfd 0: gpio, sctl, scr, timers / apbregs */
 555        [STA2X11_MFD0] = {
 556                .bars = {
 557                        [0] = {
 558                                .cells = sta2x11_mfd0_bar0,
 559                                .ncells = ARRAY_SIZE(sta2x11_mfd0_bar0),
 560                        },
 561                        [1] = {
 562                                .cells = sta2x11_mfd0_bar1,
 563                                .ncells = ARRAY_SIZE(sta2x11_mfd0_bar1),
 564                        },
 565                },
 566        },
 567        /* Mfd 1: vic / apb-soc-regs */
 568        [STA2X11_MFD1] = {
 569                .bars = {
 570                        [0] = {
 571                                .cells = sta2x11_mfd1_bar0,
 572                                .ncells = ARRAY_SIZE(sta2x11_mfd1_bar0),
 573                        },
 574                        [1] = {
 575                                .cells = sta2x11_mfd1_bar1,
 576                                .ncells = ARRAY_SIZE(sta2x11_mfd1_bar1),
 577                        },
 578                },
 579        },
 580};
 581
 582static void sta2x11_mfd_setup(struct pci_dev *pdev,
 583                              struct sta2x11_mfd_setup_data *sd)
 584{
 585        int i, j;
 586        for (i = 0; i < ARRAY_SIZE(sd->bars); i++)
 587                for (j = 0; j < sd->bars[i].ncells; j++) {
 588                        sd->bars[i].cells[j].pdata_size = sizeof(pdev);
 589                        sd->bars[i].cells[j].platform_data = &pdev;
 590                }
 591}
 592
 593static int sta2x11_mfd_probe(struct pci_dev *pdev,
 594                             const struct pci_device_id *pci_id)
 595{
 596        int err, i;
 597        struct sta2x11_mfd_setup_data *setup_data;
 598
 599        dev_info(&pdev->dev, "%s\n", __func__);
 600
 601        err = pci_enable_device(pdev);
 602        if (err) {
 603                dev_err(&pdev->dev, "Can't enable device.\n");
 604                return err;
 605        }
 606
 607        err = pci_enable_msi(pdev);
 608        if (err)
 609                dev_info(&pdev->dev, "Enable msi failed\n");
 610
 611        setup_data = pci_id->device == PCI_DEVICE_ID_STMICRO_GPIO ?
 612                &mfd_setup_data[STA2X11_MFD0] :
 613                &mfd_setup_data[STA2X11_MFD1];
 614
 615        /* platform data is the pci device for all of them */
 616        sta2x11_mfd_setup(pdev, setup_data);
 617
 618        /* Record this pdev before mfd_add_devices: their probe looks for it */
 619        if (!sta2x11_mfd_find(pdev))
 620                sta2x11_mfd_add(pdev, GFP_ATOMIC);
 621
 622        /* Just 2 bars for all mfd's at present */
 623        for (i = 0; i < 2; i++) {
 624                err = mfd_add_devices(&pdev->dev, -1,
 625                                      setup_data->bars[i].cells,
 626                                      setup_data->bars[i].ncells,
 627                                      &pdev->resource[i],
 628                                      0, NULL);
 629                if (err) {
 630                        dev_err(&pdev->dev,
 631                                "mfd_add_devices[%d] failed: %d\n", i, err);
 632                        goto err_disable;
 633                }
 634        }
 635
 636        return 0;
 637
 638err_disable:
 639        mfd_remove_devices(&pdev->dev);
 640        pci_disable_device(pdev);
 641        pci_disable_msi(pdev);
 642        return err;
 643}
 644
 645static DEFINE_PCI_DEVICE_TABLE(sta2x11_mfd_tbl) = {
 646        {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_GPIO)},
 647        {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIC)},
 648        {0,},
 649};
 650
 651static struct pci_driver sta2x11_mfd_driver = {
 652        .name =         "sta2x11-mfd",
 653        .id_table =     sta2x11_mfd_tbl,
 654        .probe =        sta2x11_mfd_probe,
 655        .suspend =      sta2x11_mfd_suspend,
 656        .resume =       sta2x11_mfd_resume,
 657};
 658
 659static int __init sta2x11_mfd_init(void)
 660{
 661        pr_info("%s\n", __func__);
 662        return pci_register_driver(&sta2x11_mfd_driver);
 663}
 664
 665/*
 666 * All of this must be ready before "normal" devices like MMCI appear.
 667 * But MFD (the pci device) can't be too early. The following choice
 668 * prepares platform drivers very early and probe the PCI device later,
 669 * but before other PCI devices.
 670 */
 671subsys_initcall(sta2x11_apbreg_init);
 672subsys_initcall(sta2x11_sctl_init);
 673subsys_initcall(sta2x11_apb_soc_regs_init);
 674subsys_initcall(sta2x11_scr_init);
 675rootfs_initcall(sta2x11_mfd_init);
 676
 677MODULE_LICENSE("GPL v2");
 678MODULE_AUTHOR("Wind River");
 679MODULE_DESCRIPTION("STA2x11 mfd for GPIO, SCTL and APBREG");
 680MODULE_DEVICE_TABLE(pci, sta2x11_mfd_tbl);
 681
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.