drivers/mfd/sta2x11-mfd.c

   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
  38 static 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 */
  46 struct 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
  54 static LIST_HEAD(sta2x11_mfd_list);
  55
  56 /* Three functions to act on the list */
  57 static 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
  79 static 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 static int mfd_remove(struct pci_dev *pdev)
 102 {
 103         struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev);
 104
 105         if (!mfd)
 106                 return -ENODEV;
 107         list_del(&mfd->list);
 108         kfree(mfd);
 109         return 0;
 110 }
 111
 112 /* This function is exported and is not expected to fail */
 113 u32 __sta2x11_mfd_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val,
 114                        enum sta2x11_mfd_plat_dev index)
 115 {
 116         struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev);
 117         u32 r;
 118         unsigned long flags;
 119         void __iomem *regs;
 120
 121         if (!mfd) {
 122                 dev_warn(&pdev->dev, ": can't access sctl regs\n");
 123                 return 0;
 124         }
 125
 126         regs = mfd->regs[index];
 127         if (!regs) {
 128                 dev_warn(&pdev->dev, ": system ctl not initialized\n");
 129                 return 0;
 130         }
 131         spin_lock_irqsave(&mfd->lock[index], flags);
 132         r = readl(regs + reg);
 133         r &= ~mask;
 134         r |= val;
 135         if (mask)
 136                 writel(r, regs + reg);
 137         spin_unlock_irqrestore(&mfd->lock[index], flags);
 138         return r;
 139 }
 140 EXPORT_SYMBOL(__sta2x11_mfd_mask);
 141
 142 int sta2x11_mfd_get_regs_data(struct platform_device *dev,
 143                               enum sta2x11_mfd_plat_dev index,
 144                               void __iomem **regs,
 145                               spinlock_t **lock)
 146 {
 147         struct pci_dev *pdev = *(struct pci_dev **)(dev->dev.platform_data);
 148         struct sta2x11_mfd *mfd;
 149
 150         if (!pdev)
 151                 return -ENODEV;
 152         mfd = sta2x11_mfd_find(pdev);
 153         if (!mfd)
 154                 return -ENODEV;
 155         if (index >= sta2x11_n_mfd_plat_devs)
 156                 return -ENODEV;
 157         *regs = mfd->regs[index];
 158         *lock = &mfd->lock[index];
 159         pr_debug("%s %d *regs = %p\n", __func__, __LINE__, *regs);
 160         return *regs ? 0 : -ENODEV;
 161 }
 162 EXPORT_SYMBOL(sta2x11_mfd_get_regs_data);
 163
 164 /*
 165  * Special sta2x11-mfd regmap lock/unlock functions
 166  */
 167
 168 static void sta2x11_regmap_lock(void *__lock)
 169 {
 170         spinlock_t *lock = __lock;
 171         spin_lock(lock);
 172 }
 173
 174 static void sta2x11_regmap_unlock(void *__lock)
 175 {
 176         spinlock_t *lock = __lock;
 177         spin_unlock(lock);
 178 }
 179
 180 /* OTP (one time programmable registers do not require locking */
 181 static void sta2x11_regmap_nolock(void *__lock)
 182 {
 183 }
 184
 185 static const char *sta2x11_mfd_names[sta2x11_n_mfd_plat_devs] = {
 186         [sta2x11_sctl] = STA2X11_MFD_SCTL_NAME,
 187         [sta2x11_apbreg] = STA2X11_MFD_APBREG_NAME,
 188         [sta2x11_apb_soc_regs] = STA2X11_MFD_APB_SOC_REGS_NAME,
 189         [sta2x11_scr] = STA2X11_MFD_SCR_NAME,
 190 };
 191
 192 static bool sta2x11_sctl_writeable_reg(struct device *dev, unsigned int reg)
 193 {
 194         return !__reg_within_range(reg, SCTL_SCPCIECSBRST, SCTL_SCRSTSTA);
 195 }
 196
 197 static struct regmap_config sta2x11_sctl_regmap_config = {
 198         .reg_bits = 32,
 199         .reg_stride = 4,
 200         .val_bits = 32,
 201         .lock = sta2x11_regmap_lock,
 202         .unlock = sta2x11_regmap_unlock,
 203         .max_register = SCTL_SCRSTSTA,
 204         .writeable_reg = sta2x11_sctl_writeable_reg,
 205 };
 206
 207 static bool sta2x11_scr_readable_reg(struct device *dev, unsigned int reg)
 208 {
 209         return (reg == STA2X11_SECR_CR) ||
 210                 __reg_within_range(reg, STA2X11_SECR_FVR0, STA2X11_SECR_FVR1);
 211 }
 212
 213 static bool sta2x11_scr_writeable_reg(struct device *dev, unsigned int reg)
 214 {
 215         return false;
 216 }
 217
 218 static struct regmap_config sta2x11_scr_regmap_config = {
 219         .reg_bits = 32,
 220         .reg_stride = 4,
 221         .val_bits = 32,
 222         .lock = sta2x11_regmap_nolock,
 223         .unlock = sta2x11_regmap_nolock,
 224         .max_register = STA2X11_SECR_FVR1,
 225         .readable_reg = sta2x11_scr_readable_reg,
 226         .writeable_reg = sta2x11_scr_writeable_reg,
 227 };
 228
 229 static bool sta2x11_apbreg_readable_reg(struct device *dev, unsigned int reg)
 230 {
 231         /* Two blocks (CAN and MLB, SARAC) 0x100 bytes apart */
 232         if (reg >= APBREG_BSR_SARAC)
 233                 reg -= APBREG_BSR_SARAC;
 234         switch (reg) {
 235         case APBREG_BSR:
 236         case APBREG_PAER:
 237         case APBREG_PWAC:
 238         case APBREG_PRAC:
 239         case APBREG_PCG:
 240         case APBREG_PUR:
 241         case APBREG_EMU_PCG:
 242                 return true;
 243         default:
 244                 return false;
 245         }
 246 }
 247
 248 static bool sta2x11_apbreg_writeable_reg(struct device *dev, unsigned int reg)
 249 {
 250         if (reg >= APBREG_BSR_SARAC)
 251                 reg -= APBREG_BSR_SARAC;
 252         if (!sta2x11_apbreg_readable_reg(dev, reg))
 253                 return false;
 254         return reg != APBREG_PAER;
 255 }
 256
 257 static struct regmap_config sta2x11_apbreg_regmap_config = {
 258         .reg_bits = 32,
 259         .reg_stride = 4,
 260         .val_bits = 32,
 261         .lock = sta2x11_regmap_lock,
 262         .unlock = sta2x11_regmap_unlock,
 263         .max_register = APBREG_EMU_PCG_SARAC,
 264         .readable_reg = sta2x11_apbreg_readable_reg,
 265         .writeable_reg = sta2x11_apbreg_writeable_reg,
 266 };
 267
 268 static bool sta2x11_apb_soc_regs_readable_reg(struct device *dev,
 269                                               unsigned int reg)
 270 {
 271         return reg <= PCIE_SoC_INT_ROUTER_STATUS3_REG ||
 272                 __reg_within_range(reg, DMA_IP_CTRL_REG, SPARE3_RESERVED) ||
 273                 __reg_within_range(reg, MASTER_LOCK_REG,
 274                                    SYSTEM_CONFIG_STATUS_REG) ||
 275                 reg == MSP_CLK_CTRL_REG ||
 276                 __reg_within_range(reg, COMPENSATION_REG1, TEST_CTL_REG);
 277 }
 278
 279 static bool sta2x11_apb_soc_regs_writeable_reg(struct device *dev,
 280                                                unsigned int reg)
 281 {
 282         if (!sta2x11_apb_soc_regs_readable_reg(dev, reg))
 283                 return false;
 284         switch (reg) {
 285         case PCIE_COMMON_CLOCK_CONFIG_0_4_0:
 286         case SYSTEM_CONFIG_STATUS_REG:
 287         case COMPENSATION_REG1:
 288         case PCIE_SoC_INT_ROUTER_STATUS0_REG...PCIE_SoC_INT_ROUTER_STATUS3_REG:
 289         case PCIE_PM_STATUS_0_PORT_0_4...PCIE_PM_STATUS_7_0_EP4:
 290                 return false;
 291         default:
 292                 return true;
 293         }
 294 }
 295
 296 static struct regmap_config sta2x11_apb_soc_regs_regmap_config = {
 297         .reg_bits = 32,
 298         .reg_stride = 4,
 299         .val_bits = 32,
 300         .lock = sta2x11_regmap_lock,
 301         .unlock = sta2x11_regmap_unlock,
 302         .max_register = TEST_CTL_REG,
 303         .readable_reg = sta2x11_apb_soc_regs_readable_reg,
 304         .writeable_reg = sta2x11_apb_soc_regs_writeable_reg,
 305 };
 306
 307 static struct regmap_config *
 308 sta2x11_mfd_regmap_configs[sta2x11_n_mfd_plat_devs] = {
 309         [sta2x11_sctl] = &sta2x11_sctl_regmap_config,
 310         [sta2x11_apbreg] = &sta2x11_apbreg_regmap_config,
 311         [sta2x11_apb_soc_regs] = &sta2x11_apb_soc_regs_regmap_config,
 312         [sta2x11_scr] = &sta2x11_scr_regmap_config,
 313 };
 314
 315 /* Probe for the four platform devices */
 316
 317 static int sta2x11_mfd_platform_probe(struct platform_device *dev,
 318                                       enum sta2x11_mfd_plat_dev index)
 319 {
 320         struct pci_dev **pdev;
 321         struct sta2x11_mfd *mfd;
 322         struct resource *res;
 323         const char *name = sta2x11_mfd_names[index];
 324         struct regmap_config *regmap_config = sta2x11_mfd_regmap_configs[index];
 325
 326         pdev = dev->dev.platform_data;
 327         mfd = sta2x11_mfd_find(*pdev);
 328         if (!mfd)
 329                 return -ENODEV;
 330         if (!regmap_config)
 331                 return -ENODEV;
 332
 333         res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 334         if (!res)
 335                 return -ENOMEM;
 336
 337         if (!request_mem_region(res->start, resource_size(res), name))
 338                 return -EBUSY;
 339
 340         mfd->regs[index] = ioremap(res->start, resource_size(res));
 341         if (!mfd->regs[index]) {
 342                 release_mem_region(res->start, resource_size(res));
 343                 return -ENOMEM;
 344         }
 345         regmap_config->lock_arg = &mfd->lock;
 346         /*
 347            No caching, registers could be reached both via regmap and via
 348            void __iomem *
 349         */
 350         regmap_config->cache_type = REGCACHE_NONE;
 351         mfd->regmap[index] = devm_regmap_init_mmio(&dev->dev, mfd->regs[index],
 352                                                    regmap_config);
 353         WARN_ON(!mfd->regmap[index]);
 354
 355         return 0;
 356 }
 357
 358 static int sta2x11_sctl_probe(struct platform_device *dev)
 359 {
 360         return sta2x11_mfd_platform_probe(dev, sta2x11_sctl);
 361 }
 362
 363 static int sta2x11_apbreg_probe(struct platform_device *dev)
 364 {
 365         return sta2x11_mfd_platform_probe(dev, sta2x11_apbreg);
 366 }
 367
 368 static int sta2x11_apb_soc_regs_probe(struct platform_device *dev)
 369 {
 370         return sta2x11_mfd_platform_probe(dev, sta2x11_apb_soc_regs);
 371 }
 372
 373 static int sta2x11_scr_probe(struct platform_device *dev)
 374 {
 375         return sta2x11_mfd_platform_probe(dev, sta2x11_scr);
 376 }
 377
 378 /* The three platform drivers */
 379 static struct platform_driver sta2x11_sctl_platform_driver = {
 380         .driver = {
 381                 .name   = STA2X11_MFD_SCTL_NAME,
 382                 .owner  = THIS_MODULE,
 383         },
 384         .probe          = sta2x11_sctl_probe,
 385 };
 386
 387 static int __init sta2x11_sctl_init(void)
 388 {
 389         pr_info("%s\n", __func__);
 390         return platform_driver_register(&sta2x11_sctl_platform_driver);
 391 }
 392
 393 static struct platform_driver sta2x11_platform_driver = {
 394         .driver = {
 395                 .name   = STA2X11_MFD_APBREG_NAME,
 396                 .owner  = THIS_MODULE,
 397         },
 398         .probe          = sta2x11_apbreg_probe,
 399 };
 400
 401 static int __init sta2x11_apbreg_init(void)
 402 {
 403         pr_info("%s\n", __func__);
 404         return platform_driver_register(&sta2x11_platform_driver);
 405 }
 406
 407 static struct platform_driver sta2x11_apb_soc_regs_platform_driver = {
 408         .driver = {
 409                 .name   = STA2X11_MFD_APB_SOC_REGS_NAME,
 410                 .owner  = THIS_MODULE,
 411         },
 412         .probe          = sta2x11_apb_soc_regs_probe,
 413 };
 414
 415 static int __init sta2x11_apb_soc_regs_init(void)
 416 {
 417         pr_info("%s\n", __func__);
 418         return platform_driver_register(&sta2x11_apb_soc_regs_platform_driver);
 419 }
 420
 421 static struct platform_driver sta2x11_scr_platform_driver = {
 422         .driver = {
 423                 .name = STA2X11_MFD_SCR_NAME,
 424                 .owner = THIS_MODULE,
 425         },
 426         .probe = sta2x11_scr_probe,
 427 };
 428
 429 static int __init sta2x11_scr_init(void)
 430 {
 431         pr_info("%s\n", __func__);
 432         return platform_driver_register(&sta2x11_scr_platform_driver);
 433 }
 434
 435
 436 /*
 437  * What follows are the PCI devices that host the above pdevs.
 438  * Each logic block is 4kB and they are all consecutive: we use this info.
 439  */
 440
 441 /* Mfd 0 device */
 442
 443 /* Mfd 0, Bar 0 */
 444 enum mfd0_bar0_cells {
 445         STA2X11_GPIO_0 = 0,
 446         STA2X11_GPIO_1,
 447         STA2X11_GPIO_2,
 448         STA2X11_GPIO_3,
 449         STA2X11_SCTL,
 450         STA2X11_SCR,
 451         STA2X11_TIME,
 452 };
 453 /* Mfd 0 , Bar 1 */
 454 enum mfd0_bar1_cells {
 455         STA2X11_APBREG = 0,
 456 };
 457 #define CELL_4K(_name, _cell) { \
 458                 .name = _name, \
 459                 .start = _cell * 4096, .end = _cell * 4096 + 4095, \
 460                 .flags = IORESOURCE_MEM, \
 461                 }
 462
 463 static const struct resource gpio_resources[] = {
 464         {
 465                 /* 4 consecutive cells, 1 driver */
 466                 .name = STA2X11_MFD_GPIO_NAME,
 467                 .start = 0,
 468                 .end = (4 * 4096) - 1,
 469                 .flags = IORESOURCE_MEM,
 470         }
 471 };
 472 static const struct resource sctl_resources[] = {
 473         CELL_4K(STA2X11_MFD_SCTL_NAME, STA2X11_SCTL),
 474 };
 475 static const struct resource scr_resources[] = {
 476         CELL_4K(STA2X11_MFD_SCR_NAME, STA2X11_SCR),
 477 };
 478 static const struct resource time_resources[] = {
 479         CELL_4K(STA2X11_MFD_TIME_NAME, STA2X11_TIME),
 480 };
 481
 482 static const struct resource apbreg_resources[] = {
 483         CELL_4K(STA2X11_MFD_APBREG_NAME, STA2X11_APBREG),
 484 };
 485
 486 #define DEV(_name, _r) \
 487         { .name = _name, .num_resources = ARRAY_SIZE(_r), .resources = _r, }
 488
 489 static struct mfd_cell sta2x11_mfd0_bar0[] = {
 490         /* offset 0: we add pdata later */
 491         DEV(STA2X11_MFD_GPIO_NAME, gpio_resources),
 492         DEV(STA2X11_MFD_SCTL_NAME, sctl_resources),
 493         DEV(STA2X11_MFD_SCR_NAME,  scr_resources),
 494         DEV(STA2X11_MFD_TIME_NAME, time_resources),
 495 };
 496
 497 static struct mfd_cell sta2x11_mfd0_bar1[] = {
 498         DEV(STA2X11_MFD_APBREG_NAME, apbreg_resources),
 499 };
 500
 501 /* Mfd 1 devices */
 502
 503 /* Mfd 1, Bar 0 */
 504 enum mfd1_bar0_cells {
 505         STA2X11_VIC = 0,
 506 };
 507
 508 /* Mfd 1, Bar 1 */
 509 enum mfd1_bar1_cells {
 510         STA2X11_APB_SOC_REGS = 0,
 511 };
 512
 513 static const struct resource vic_resources[] = {
 514         CELL_4K(STA2X11_MFD_VIC_NAME, STA2X11_VIC),
 515 };
 516
 517 static const struct resource apb_soc_regs_resources[] = {
 518         CELL_4K(STA2X11_MFD_APB_SOC_REGS_NAME, STA2X11_APB_SOC_REGS),
 519 };
 520
 521 static struct mfd_cell sta2x11_mfd1_bar0[] = {
 522         DEV(STA2X11_MFD_VIC_NAME, vic_resources),
 523 };
 524
 525 static struct mfd_cell sta2x11_mfd1_bar1[] = {
 526         DEV(STA2X11_MFD_APB_SOC_REGS_NAME, apb_soc_regs_resources),
 527 };
 528
 529
 530 static int sta2x11_mfd_suspend(struct pci_dev *pdev, pm_message_t state)
 531 {
 532         pci_save_state(pdev);
 533         pci_disable_device(pdev);
 534         pci_set_power_state(pdev, pci_choose_state(pdev, state));
 535
 536         return 0;
 537 }
 538
 539 static int sta2x11_mfd_resume(struct pci_dev *pdev)
 540 {
 541         int err;
 542
 543         pci_set_power_state(pdev, 0);
 544         err = pci_enable_device(pdev);
 545         if (err)
 546                 return err;
 547         pci_restore_state(pdev);
 548
 549         return 0;
 550 }
 551
 552 struct sta2x11_mfd_bar_setup_data {
 553         struct mfd_cell *cells;
 554         int ncells;
 555 };
 556
 557 struct sta2x11_mfd_setup_data {
 558         struct sta2x11_mfd_bar_setup_data bars[2];
 559 };
 560
 561 #define STA2X11_MFD0 0
 562 #define STA2X11_MFD1 1
 563
 564 static struct sta2x11_mfd_setup_data mfd_setup_data[] = {
 565         /* Mfd 0: gpio, sctl, scr, timers / apbregs */
 566         [STA2X11_MFD0] = {
 567                 .bars = {
 568                         [0] = {
 569                                 .cells = sta2x11_mfd0_bar0,
 570                                 .ncells = ARRAY_SIZE(sta2x11_mfd0_bar0),
 571                         },
 572                         [1] = {
 573                                 .cells = sta2x11_mfd0_bar1,
 574                                 .ncells = ARRAY_SIZE(sta2x11_mfd0_bar1),
 575                         },
 576                 },
 577         },
 578         /* Mfd 1: vic / apb-soc-regs */
 579         [STA2X11_MFD1] = {
 580                 .bars = {
 581                         [0] = {
 582                                 .cells = sta2x11_mfd1_bar0,
 583                                 .ncells = ARRAY_SIZE(sta2x11_mfd1_bar0),
 584                         },
 585                         [1] = {
 586                                 .cells = sta2x11_mfd1_bar1,
 587                                 .ncells = ARRAY_SIZE(sta2x11_mfd1_bar1),
 588                         },
 589                 },
 590         },
 591 };
 592
 593 static void sta2x11_mfd_setup(struct pci_dev *pdev,
 594                               struct sta2x11_mfd_setup_data *sd)
 595 {
 596         int i, j;
 597         for (i = 0; i < ARRAY_SIZE(sd->bars); i++)
 598                 for (j = 0; j < sd->bars[i].ncells; j++) {
 599                         sd->bars[i].cells[j].pdata_size = sizeof(pdev);
 600                         sd->bars[i].cells[j].platform_data = &pdev;
 601                 }
 602 }
 603
 604 static int sta2x11_mfd_probe(struct pci_dev *pdev,
 605                              const struct pci_device_id *pci_id)
 606 {
 607         int err, i;
 608         struct sta2x11_mfd_setup_data *setup_data;
 609
 610         dev_info(&pdev->dev, "%s\n", __func__);
 611
 612         err = pci_enable_device(pdev);
 613         if (err) {
 614                 dev_err(&pdev->dev, "Can't enable device.\n");
 615                 return err;
 616         }
 617
 618         err = pci_enable_msi(pdev);
 619         if (err)
 620                 dev_info(&pdev->dev, "Enable msi failed\n");
 621
 622         setup_data = pci_id->device == PCI_DEVICE_ID_STMICRO_GPIO ?
 623                 &mfd_setup_data[STA2X11_MFD0] :
 624                 &mfd_setup_data[STA2X11_MFD1];
 625
 626         /* platform data is the pci device for all of them */
 627         sta2x11_mfd_setup(pdev, setup_data);
 628
 629         /* Record this pdev before mfd_add_devices: their probe looks for it */
 630         if (!sta2x11_mfd_find(pdev))
 631                 sta2x11_mfd_add(pdev, GFP_ATOMIC);
 632
 633         /* Just 2 bars for all mfd's at present */
 634         for (i = 0; i < 2; i++) {
 635                 err = mfd_add_devices(&pdev->dev, -1,
 636                                       setup_data->bars[i].cells,
 637                                       setup_data->bars[i].ncells,
 638                                       &pdev->resource[i],
 639                                       0, NULL);
 640                 if (err) {
 641                         dev_err(&pdev->dev,
 642                                 "mfd_add_devices[%d] failed: %d\n", i, err);
 643                         goto err_disable;
 644                 }
 645         }
 646
 647         return 0;
 648
 649 err_disable:
 650         mfd_remove_devices(&pdev->dev);
 651         pci_disable_device(pdev);
 652         pci_disable_msi(pdev);
 653         return err;
 654 }
 655
 656 static DEFINE_PCI_DEVICE_TABLE(sta2x11_mfd_tbl) = {
 657         {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_GPIO)},
 658         {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIC)},
 659         {0,},
 660 };
 661
 662 static struct pci_driver sta2x11_mfd_driver = {
 663         .name =         "sta2x11-mfd",
 664         .id_table =     sta2x11_mfd_tbl,
 665         .probe =        sta2x11_mfd_probe,
 666         .suspend =      sta2x11_mfd_suspend,
 667         .resume =       sta2x11_mfd_resume,
 668 };
 669
 670 static int __init sta2x11_mfd_init(void)
 671 {
 672         pr_info("%s\n", __func__);
 673         return pci_register_driver(&sta2x11_mfd_driver);
 674 }
 675
 676 /*
 677  * All of this must be ready before "normal" devices like MMCI appear.
 678  * But MFD (the pci device) can't be too early. The following choice
 679  * prepares platform drivers very early and probe the PCI device later,
 680  * but before other PCI devices.
 681  */
 682 subsys_initcall(sta2x11_apbreg_init);
 683 subsys_initcall(sta2x11_sctl_init);
 684 subsys_initcall(sta2x11_apb_soc_regs_init);
 685 subsys_initcall(sta2x11_scr_init);
 686 rootfs_initcall(sta2x11_mfd_init);
 687
 688 MODULE_LICENSE("GPL v2");
 689 MODULE_AUTHOR("Wind River");
 690 MODULE_DESCRIPTION("STA2x11 mfd for GPIO, SCTL and APBREG");
 691 MODULE_DEVICE_TABLE(pci, sta2x11_mfd_tbl);