drivers/media/video/marvell-ccic/cafe-driver.c

   1 /*
   2  * A driver for the CMOS camera controller in the Marvell 88ALP01 "cafe"
   3  * multifunction chip.  Currently works with the Omnivision OV7670
   4  * sensor.
   5  *
   6  * The data sheet for this device can be found at:
   7  *    http://www.marvell.com/products/pc_connectivity/88alp01/
   8  *
   9  * Copyright 2006-11 One Laptop Per Child Association, Inc.
  10  * Copyright 2006-11 Jonathan Corbet <corbet@lwn.net>
  11  *
  12  * Written by Jonathan Corbet, corbet@lwn.net.
  13  *
  14  * v4l2_device/v4l2_subdev conversion by:
  15  * Copyright (C) 2009 Hans Verkuil <hverkuil@xs4all.nl>
  16  *
  17  * This file may be distributed under the terms of the GNU General
  18  * Public License, version 2.
  19  */
  20 #include <linux/kernel.h>
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23 #include <linux/pci.h>
  24 #include <linux/i2c.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/slab.h>
  28 #include <linux/videodev2.h>
  29 #include <media/v4l2-device.h>
  30 #include <media/v4l2-chip-ident.h>
  31 #include <linux/device.h>
  32 #include <linux/wait.h>
  33 #include <linux/delay.h>
  34 #include <linux/io.h>
  35
  36 #include "mcam-core.h"
  37
  38 #define CAFE_VERSION 0x000002
  39
  40
  41 /*
  42  * Parameters.
  43  */
  44 MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>");
  45 MODULE_DESCRIPTION("Marvell 88ALP01 CMOS Camera Controller driver");
  46 MODULE_LICENSE("GPL");
  47 MODULE_SUPPORTED_DEVICE("Video");
  48
  49
  50
  51
  52 struct cafe_camera {
  53         int registered;                 /* Fully initialized? */
  54         struct mcam_camera mcam;
  55         struct pci_dev *pdev;
  56         wait_queue_head_t smbus_wait;   /* Waiting on i2c events */
  57 };
  58
  59 /*
  60  * Most of the camera controller registers are defined in mcam-core.h,
  61  * but the Cafe platform has some additional registers of its own;
  62  * they are described here.
  63  */
  64
  65 /*
  66  * "General purpose register" has a couple of GPIOs used for sensor
  67  * power and reset on OLPC XO 1.0 systems.
  68  */
  69 #define REG_GPR         0xb4
  70 #define   GPR_C1EN        0x00000020    /* Pad 1 (power down) enable */
  71 #define   GPR_C0EN        0x00000010    /* Pad 0 (reset) enable */
  72 #define   GPR_C1          0x00000002    /* Control 1 value */
  73 /*
  74  * Control 0 is wired to reset on OLPC machines.  For ov7x sensors,
  75  * it is active low.
  76  */
  77 #define   GPR_C0          0x00000001    /* Control 0 value */
  78
  79 /*
  80  * These registers control the SMBUS module for communicating
  81  * with the sensor.
  82  */
  83 #define REG_TWSIC0      0xb8    /* TWSI (smbus) control 0 */
  84 #define   TWSIC0_EN       0x00000001    /* TWSI enable */
  85 #define   TWSIC0_MODE     0x00000002    /* 1 = 16-bit, 0 = 8-bit */
  86 #define   TWSIC0_SID      0x000003fc    /* Slave ID */
  87 /*
  88  * Subtle trickery: the slave ID field starts with bit 2.  But the
  89  * Linux i2c stack wants to treat the bottommost bit as a separate
  90  * read/write bit, which is why slave ID's are usually presented
  91  * >>1.  For consistency with that behavior, we shift over three
  92  * bits instead of two.
  93  */
  94 #define   TWSIC0_SID_SHIFT 3
  95 #define   TWSIC0_CLKDIV   0x0007fc00    /* Clock divider */
  96 #define   TWSIC0_MASKACK  0x00400000    /* Mask ack from sensor */
  97 #define   TWSIC0_OVMAGIC  0x00800000    /* Make it work on OV sensors */
  98
  99 #define REG_TWSIC1      0xbc    /* TWSI control 1 */
 100 #define   TWSIC1_DATA     0x0000ffff    /* Data to/from camchip */
 101 #define   TWSIC1_ADDR     0x00ff0000    /* Address (register) */
 102 #define   TWSIC1_ADDR_SHIFT 16
 103 #define   TWSIC1_READ     0x01000000    /* Set for read op */
 104 #define   TWSIC1_WSTAT    0x02000000    /* Write status */
 105 #define   TWSIC1_RVALID   0x04000000    /* Read data valid */
 106 #define   TWSIC1_ERROR    0x08000000    /* Something screwed up */
 107
 108 /*
 109  * Here's the weird global control registers
 110  */
 111 #define REG_GL_CSR     0x3004  /* Control/status register */
 112 #define   GCSR_SRS       0x00000001     /* SW Reset set */
 113 #define   GCSR_SRC       0x00000002     /* SW Reset clear */
 114 #define   GCSR_MRS       0x00000004     /* Master reset set */
 115 #define   GCSR_MRC       0x00000008     /* HW Reset clear */
 116 #define   GCSR_CCIC_EN   0x00004000    /* CCIC Clock enable */
 117 #define REG_GL_IMASK   0x300c  /* Interrupt mask register */
 118 #define   GIMSK_CCIC_EN          0x00000004    /* CCIC Interrupt enable */
 119
 120 #define REG_GL_FCR      0x3038  /* GPIO functional control register */
 121 #define   GFCR_GPIO_ON    0x08          /* Camera GPIO enabled */
 122 #define REG_GL_GPIOR    0x315c  /* GPIO register */
 123 #define   GGPIO_OUT             0x80000 /* GPIO output */
 124 #define   GGPIO_VAL             0x00008 /* Output pin value */
 125
 126 #define REG_LEN                (REG_GL_IMASK + 4)
 127
 128
 129 /*
 130  * Debugging and related.
 131  */
 132 #define cam_err(cam, fmt, arg...) \
 133         dev_err(&(cam)->pdev->dev, fmt, ##arg);
 134 #define cam_warn(cam, fmt, arg...) \
 135         dev_warn(&(cam)->pdev->dev, fmt, ##arg);
 136
 137 /* -------------------------------------------------------------------- */
 138 /*
 139  * The I2C/SMBUS interface to the camera itself starts here.  The
 140  * controller handles SMBUS itself, presenting a relatively simple register
 141  * interface; all we have to do is to tell it where to route the data.
 142  */
 143 #define CAFE_SMBUS_TIMEOUT (HZ)  /* generous */
 144
 145 static inline struct cafe_camera *to_cam(struct v4l2_device *dev)
 146 {
 147         struct mcam_camera *m = container_of(dev, struct mcam_camera, v4l2_dev);
 148         return container_of(m, struct cafe_camera, mcam);
 149 }
 150
 151
 152 static int cafe_smbus_write_done(struct mcam_camera *mcam)
 153 {
 154         unsigned long flags;
 155         int c1;
 156
 157         /*
 158          * We must delay after the interrupt, or the controller gets confused
 159          * and never does give us good status.  Fortunately, we don't do this
 160          * often.
 161          */
 162         udelay(20);
 163         spin_lock_irqsave(&mcam->dev_lock, flags);
 164         c1 = mcam_reg_read(mcam, REG_TWSIC1);
 165         spin_unlock_irqrestore(&mcam->dev_lock, flags);
 166         return (c1 & (TWSIC1_WSTAT|TWSIC1_ERROR)) != TWSIC1_WSTAT;
 167 }
 168
 169 static int cafe_smbus_write_data(struct cafe_camera *cam,
 170                 u16 addr, u8 command, u8 value)
 171 {
 172         unsigned int rval;
 173         unsigned long flags;
 174         struct mcam_camera *mcam = &cam->mcam;
 175
 176         spin_lock_irqsave(&mcam->dev_lock, flags);
 177         rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID);
 178         rval |= TWSIC0_OVMAGIC;  /* Make OV sensors work */
 179         /*
 180          * Marvell sez set clkdiv to all 1's for now.
 181          */
 182         rval |= TWSIC0_CLKDIV;
 183         mcam_reg_write(mcam, REG_TWSIC0, rval);
 184         (void) mcam_reg_read(mcam, REG_TWSIC1); /* force write */
 185         rval = value | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR);
 186         mcam_reg_write(mcam, REG_TWSIC1, rval);
 187         spin_unlock_irqrestore(&mcam->dev_lock, flags);
 188
 189         /* Unfortunately, reading TWSIC1 too soon after sending a command
 190          * causes the device to die.
 191          * Use a busy-wait because we often send a large quantity of small
 192          * commands at-once; using msleep() would cause a lot of context
 193          * switches which take longer than 2ms, resulting in a noticeable
 194          * boot-time and capture-start delays.
 195          */
 196         mdelay(2);
 197
 198         /*
 199          * Another sad fact is that sometimes, commands silently complete but
 200          * cafe_smbus_write_done() never becomes aware of this.
 201          * This happens at random and appears to possible occur with any
 202          * command.
 203          * We don't understand why this is. We work around this issue
 204          * with the timeout in the wait below, assuming that all commands
 205          * complete within the timeout.
 206          */
 207         wait_event_timeout(cam->smbus_wait, cafe_smbus_write_done(mcam),
 208                         CAFE_SMBUS_TIMEOUT);
 209
 210         spin_lock_irqsave(&mcam->dev_lock, flags);
 211         rval = mcam_reg_read(mcam, REG_TWSIC1);
 212         spin_unlock_irqrestore(&mcam->dev_lock, flags);
 213
 214         if (rval & TWSIC1_WSTAT) {
 215                 cam_err(cam, "SMBUS write (%02x/%02x/%02x) timed out\n", addr,
 216                                 command, value);
 217                 return -EIO;
 218         }
 219         if (rval & TWSIC1_ERROR) {
 220                 cam_err(cam, "SMBUS write (%02x/%02x/%02x) error\n", addr,
 221                                 command, value);
 222                 return -EIO;
 223         }
 224         return 0;
 225 }
 226
 227
 228
 229 static int cafe_smbus_read_done(struct mcam_camera *mcam)
 230 {
 231         unsigned long flags;
 232         int c1;
 233
 234         /*
 235          * We must delay after the interrupt, or the controller gets confused
 236          * and never does give us good status.  Fortunately, we don't do this
 237          * often.
 238          */
 239         udelay(20);
 240         spin_lock_irqsave(&mcam->dev_lock, flags);
 241         c1 = mcam_reg_read(mcam, REG_TWSIC1);
 242         spin_unlock_irqrestore(&mcam->dev_lock, flags);
 243         return c1 & (TWSIC1_RVALID|TWSIC1_ERROR);
 244 }
 245
 246
 247
 248 static int cafe_smbus_read_data(struct cafe_camera *cam,
 249                 u16 addr, u8 command, u8 *value)
 250 {
 251         unsigned int rval;
 252         unsigned long flags;
 253         struct mcam_camera *mcam = &cam->mcam;
 254
 255         spin_lock_irqsave(&mcam->dev_lock, flags);
 256         rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID);
 257         rval |= TWSIC0_OVMAGIC; /* Make OV sensors work */
 258         /*
 259          * Marvel sez set clkdiv to all 1's for now.
 260          */
 261         rval |= TWSIC0_CLKDIV;
 262         mcam_reg_write(mcam, REG_TWSIC0, rval);
 263         (void) mcam_reg_read(mcam, REG_TWSIC1); /* force write */
 264         rval = TWSIC1_READ | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR);
 265         mcam_reg_write(mcam, REG_TWSIC1, rval);
 266         spin_unlock_irqrestore(&mcam->dev_lock, flags);
 267
 268         wait_event_timeout(cam->smbus_wait,
 269                         cafe_smbus_read_done(mcam), CAFE_SMBUS_TIMEOUT);
 270         spin_lock_irqsave(&mcam->dev_lock, flags);
 271         rval = mcam_reg_read(mcam, REG_TWSIC1);
 272         spin_unlock_irqrestore(&mcam->dev_lock, flags);
 273
 274         if (rval & TWSIC1_ERROR) {
 275                 cam_err(cam, "SMBUS read (%02x/%02x) error\n", addr, command);
 276                 return -EIO;
 277         }
 278         if (!(rval & TWSIC1_RVALID)) {
 279                 cam_err(cam, "SMBUS read (%02x/%02x) timed out\n", addr,
 280                                 command);
 281                 return -EIO;
 282         }
 283         *value = rval & 0xff;
 284         return 0;
 285 }
 286
 287 /*
 288  * Perform a transfer over SMBUS.  This thing is called under
 289  * the i2c bus lock, so we shouldn't race with ourselves...
 290  */
 291 static int cafe_smbus_xfer(struct i2c_adapter *adapter, u16 addr,
 292                 unsigned short flags, char rw, u8 command,
 293                 int size, union i2c_smbus_data *data)
 294 {
 295         struct cafe_camera *cam = i2c_get_adapdata(adapter);
 296         int ret = -EINVAL;
 297
 298         /*
 299          * This interface would appear to only do byte data ops.  OK
 300          * it can do word too, but the cam chip has no use for that.
 301          */
 302         if (size != I2C_SMBUS_BYTE_DATA) {
 303                 cam_err(cam, "funky xfer size %d\n", size);
 304                 return -EINVAL;
 305         }
 306
 307         if (rw == I2C_SMBUS_WRITE)
 308                 ret = cafe_smbus_write_data(cam, addr, command, data->byte);
 309         else if (rw == I2C_SMBUS_READ)
 310                 ret = cafe_smbus_read_data(cam, addr, command, &data->byte);
 311         return ret;
 312 }
 313
 314
 315 static void cafe_smbus_enable_irq(struct cafe_camera *cam)
 316 {
 317         unsigned long flags;
 318
 319         spin_lock_irqsave(&cam->mcam.dev_lock, flags);
 320         mcam_reg_set_bit(&cam->mcam, REG_IRQMASK, TWSIIRQS);
 321         spin_unlock_irqrestore(&cam->mcam.dev_lock, flags);
 322 }
 323
 324 static u32 cafe_smbus_func(struct i2c_adapter *adapter)
 325 {
 326         return I2C_FUNC_SMBUS_READ_BYTE_DATA  |
 327                I2C_FUNC_SMBUS_WRITE_BYTE_DATA;
 328 }
 329
 330 static struct i2c_algorithm cafe_smbus_algo = {
 331         .smbus_xfer = cafe_smbus_xfer,
 332         .functionality = cafe_smbus_func
 333 };
 334
 335 static int cafe_smbus_setup(struct cafe_camera *cam)
 336 {
 337         struct i2c_adapter *adap;
 338         int ret;
 339
 340         adap = kzalloc(sizeof(*adap), GFP_KERNEL);
 341         if (adap == NULL)
 342                 return -ENOMEM;
 343         cam->mcam.i2c_adapter = adap;
 344         cafe_smbus_enable_irq(cam);
 345         adap->owner = THIS_MODULE;
 346         adap->algo = &cafe_smbus_algo;
 347         strcpy(adap->name, "cafe_ccic");
 348         adap->dev.parent = &cam->pdev->dev;
 349         i2c_set_adapdata(adap, cam);
 350         ret = i2c_add_adapter(adap);
 351         if (ret)
 352                 printk(KERN_ERR "Unable to register cafe i2c adapter\n");
 353         return ret;
 354 }
 355
 356 static void cafe_smbus_shutdown(struct cafe_camera *cam)
 357 {
 358         i2c_del_adapter(cam->mcam.i2c_adapter);
 359         kfree(cam->mcam.i2c_adapter);
 360 }
 361
 362
 363 /*
 364  * Controller-level stuff
 365  */
 366
 367 static void cafe_ctlr_init(struct mcam_camera *mcam)
 368 {
 369         unsigned long flags;
 370
 371         spin_lock_irqsave(&mcam->dev_lock, flags);
 372         /*
 373          * Added magic to bring up the hardware on the B-Test board
 374          */
 375         mcam_reg_write(mcam, 0x3038, 0x8);
 376         mcam_reg_write(mcam, 0x315c, 0x80008);
 377         /*
 378          * Go through the dance needed to wake the device up.
 379          * Note that these registers are global and shared
 380          * with the NAND and SD devices.  Interaction between the
 381          * three still needs to be examined.
 382          */
 383         mcam_reg_write(mcam, REG_GL_CSR, GCSR_SRS|GCSR_MRS); /* Needed? */
 384         mcam_reg_write(mcam, REG_GL_CSR, GCSR_SRC|GCSR_MRC);
 385         mcam_reg_write(mcam, REG_GL_CSR, GCSR_SRC|GCSR_MRS);
 386         /*
 387          * Here we must wait a bit for the controller to come around.
 388          */
 389         spin_unlock_irqrestore(&mcam->dev_lock, flags);
 390         msleep(5);
 391         spin_lock_irqsave(&mcam->dev_lock, flags);
 392
 393         mcam_reg_write(mcam, REG_GL_CSR, GCSR_CCIC_EN|GCSR_SRC|GCSR_MRC);
 394         mcam_reg_set_bit(mcam, REG_GL_IMASK, GIMSK_CCIC_EN);
 395         /*
 396          * Mask all interrupts.
 397          */
 398         mcam_reg_write(mcam, REG_IRQMASK, 0);
 399         spin_unlock_irqrestore(&mcam->dev_lock, flags);
 400 }
 401
 402
 403 static void cafe_ctlr_power_up(struct mcam_camera *mcam)
 404 {
 405         /*
 406          * Part one of the sensor dance: turn the global
 407          * GPIO signal on.
 408          */
 409         mcam_reg_write(mcam, REG_GL_FCR, GFCR_GPIO_ON);
 410         mcam_reg_write(mcam, REG_GL_GPIOR, GGPIO_OUT|GGPIO_VAL);
 411         /*
 412          * Put the sensor into operational mode (assumes OLPC-style
 413          * wiring).  Control 0 is reset - set to 1 to operate.
 414          * Control 1 is power down, set to 0 to operate.
 415          */
 416         mcam_reg_write(mcam, REG_GPR, GPR_C1EN|GPR_C0EN); /* pwr up, reset */
 417         mcam_reg_write(mcam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C0);
 418 }
 419
 420 static void cafe_ctlr_power_down(struct mcam_camera *mcam)
 421 {
 422         mcam_reg_write(mcam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C1);
 423         mcam_reg_write(mcam, REG_GL_FCR, GFCR_GPIO_ON);
 424         mcam_reg_write(mcam, REG_GL_GPIOR, GGPIO_OUT);
 425 }
 426
 427
 428
 429 /*
 430  * The platform interrupt handler.
 431  */
 432 static irqreturn_t cafe_irq(int irq, void *data)
 433 {
 434         struct cafe_camera *cam = data;
 435         struct mcam_camera *mcam = &cam->mcam;
 436         unsigned int irqs, handled;
 437
 438         spin_lock(&mcam->dev_lock);
 439         irqs = mcam_reg_read(mcam, REG_IRQSTAT);
 440         handled = cam->registered && mccic_irq(mcam, irqs);
 441         if (irqs & TWSIIRQS) {
 442                 mcam_reg_write(mcam, REG_IRQSTAT, TWSIIRQS);
 443                 wake_up(&cam->smbus_wait);
 444                 handled = 1;
 445         }
 446         spin_unlock(&mcam->dev_lock);
 447         return IRQ_RETVAL(handled);
 448 }
 449
 450
 451 /* -------------------------------------------------------------------------- */
 452 /*
 453  * PCI interface stuff.
 454  */
 455
 456 static int cafe_pci_probe(struct pci_dev *pdev,
 457                 const struct pci_device_id *id)
 458 {
 459         int ret;
 460         struct cafe_camera *cam;
 461         struct mcam_camera *mcam;
 462
 463         /*
 464          * Start putting together one of our big camera structures.
 465          */
 466         ret = -ENOMEM;
 467         cam = kzalloc(sizeof(struct cafe_camera), GFP_KERNEL);
 468         if (cam == NULL)
 469                 goto out;
 470         cam->pdev = pdev;
 471         mcam = &cam->mcam;
 472         mcam->chip_id = V4L2_IDENT_CAFE;
 473         spin_lock_init(&mcam->dev_lock);
 474         init_waitqueue_head(&cam->smbus_wait);
 475         mcam->plat_power_up = cafe_ctlr_power_up;
 476         mcam->plat_power_down = cafe_ctlr_power_down;
 477         mcam->dev = &pdev->dev;
 478         /*
 479          * Set the clock speed for the XO 1; I don't believe this
 480          * driver has ever run anywhere else.
 481          */
 482         mcam->clock_speed = 45;
 483         mcam->use_smbus = 1;
 484         /*
 485          * Get set up on the PCI bus.
 486          */
 487         ret = pci_enable_device(pdev);
 488         if (ret)
 489                 goto out_free;
 490         pci_set_master(pdev);
 491
 492         ret = -EIO;
 493         mcam->regs = pci_iomap(pdev, 0, 0);
 494         if (!mcam->regs) {
 495                 printk(KERN_ERR "Unable to ioremap cafe-ccic regs\n");
 496                 goto out_disable;
 497         }
 498         ret = request_irq(pdev->irq, cafe_irq, IRQF_SHARED, "cafe-ccic", cam);
 499         if (ret)
 500                 goto out_iounmap;
 501
 502         /*
 503          * Initialize the controller and leave it powered up.  It will
 504          * stay that way until the sensor driver shows up.
 505          */
 506         cafe_ctlr_init(mcam);
 507         cafe_ctlr_power_up(mcam);
 508         /*
 509          * Set up I2C/SMBUS communications.  We have to drop the mutex here
 510          * because the sensor could attach in this call chain, leading to
 511          * unsightly deadlocks.
 512          */
 513         ret = cafe_smbus_setup(cam);
 514         if (ret)
 515                 goto out_pdown;
 516
 517         ret = mccic_register(mcam);
 518         if (ret == 0) {
 519                 cam->registered = 1;
 520                 return 0;
 521         }
 522
 523         cafe_smbus_shutdown(cam);
 524 out_pdown:
 525         cafe_ctlr_power_down(mcam);
 526         free_irq(pdev->irq, cam);
 527 out_iounmap:
 528         pci_iounmap(pdev, mcam->regs);
 529 out_disable:
 530         pci_disable_device(pdev);
 531 out_free:
 532         kfree(cam);
 533 out:
 534         return ret;
 535 }
 536
 537
 538 /*
 539  * Shut down an initialized device
 540  */
 541 static void cafe_shutdown(struct cafe_camera *cam)
 542 {
 543         mccic_shutdown(&cam->mcam);
 544         cafe_smbus_shutdown(cam);
 545         free_irq(cam->pdev->irq, cam);
 546         pci_iounmap(cam->pdev, cam->mcam.regs);
 547 }
 548
 549
 550 static void cafe_pci_remove(struct pci_dev *pdev)
 551 {
 552         struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
 553         struct cafe_camera *cam = to_cam(v4l2_dev);
 554
 555         if (cam == NULL) {
 556                 printk(KERN_WARNING "pci_remove on unknown pdev %p\n", pdev);
 557                 return;
 558         }
 559         cafe_shutdown(cam);
 560         kfree(cam);
 561 }
 562
 563
 564 #ifdef CONFIG_PM
 565 /*
 566  * Basic power management.
 567  */
 568 static int cafe_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 569 {
 570         struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
 571         struct cafe_camera *cam = to_cam(v4l2_dev);
 572         int ret;
 573
 574         ret = pci_save_state(pdev);
 575         if (ret)
 576                 return ret;
 577         mccic_suspend(&cam->mcam);
 578         pci_disable_device(pdev);
 579         return 0;
 580 }
 581
 582
 583 static int cafe_pci_resume(struct pci_dev *pdev)
 584 {
 585         struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
 586         struct cafe_camera *cam = to_cam(v4l2_dev);
 587         int ret = 0;
 588
 589         pci_restore_state(pdev);
 590         ret = pci_enable_device(pdev);
 591
 592         if (ret) {
 593                 cam_warn(cam, "Unable to re-enable device on resume!\n");
 594                 return ret;
 595         }
 596         cafe_ctlr_init(&cam->mcam);
 597         return mccic_resume(&cam->mcam);
 598 }
 599
 600 #endif  /* CONFIG_PM */
 601
 602 static struct pci_device_id cafe_ids[] = {
 603         { PCI_DEVICE(PCI_VENDOR_ID_MARVELL,
 604                      PCI_DEVICE_ID_MARVELL_88ALP01_CCIC) },
 605         { 0, }
 606 };
 607
 608 MODULE_DEVICE_TABLE(pci, cafe_ids);
 609
 610 static struct pci_driver cafe_pci_driver = {
 611         .name = "cafe1000-ccic",
 612         .id_table = cafe_ids,
 613         .probe = cafe_pci_probe,
 614         .remove = cafe_pci_remove,
 615 #ifdef CONFIG_PM
 616         .suspend = cafe_pci_suspend,
 617         .resume = cafe_pci_resume,
 618 #endif
 619 };
 620
 621
 622
 623
 624 static int __init cafe_init(void)
 625 {
 626         int ret;
 627
 628         printk(KERN_NOTICE "Marvell M88ALP01 'CAFE' Camera Controller version %d\n",
 629                         CAFE_VERSION);
 630         ret = pci_register_driver(&cafe_pci_driver);
 631         if (ret) {
 632                 printk(KERN_ERR "Unable to register cafe_ccic driver\n");
 633                 goto out;
 634         }
 635         ret = 0;
 636
 637 out:
 638         return ret;
 639 }
 640
 641
 642 static void __exit cafe_exit(void)
 643 {
 644         pci_unregister_driver(&cafe_pci_driver);
 645 }
 646
 647 module_init(cafe_init);
 648 module_exit(cafe_exit);