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