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meye.c

/*
 * Motion Eye video4linux driver for Sony Vaio PictureBook
 *
 * Copyright (C) 2001-2004 Stelian Pop <stelian@popies.net>
 *
 * Copyright (C) 2001-2002 AlcĂ´ve <www.alcove.com>
 *
 * Copyright (C) 2000 Andrew Tridgell <tridge@valinux.com>
 *
 * Earlier work by Werner Almesberger, Paul `Rusty' Russell and Paul Mackerras.
 *
 * Some parts borrowed from various video4linux drivers, especially
 * bttv-driver.c and zoran.c, see original files for credits.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/videodev.h>
#include <media/v4l2-common.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/vmalloc.h>
#include <linux/dma-mapping.h>

#include "meye.h"
#include <linux/meye.h>

MODULE_AUTHOR("Stelian Pop <stelian@popies.net>");
MODULE_DESCRIPTION("v4l/v4l2 driver for the MotionEye camera");
MODULE_LICENSE("GPL");
MODULE_VERSION(MEYE_DRIVER_VERSION);

/* force usage of V4L1 API */
static int forcev4l1; /* = 0 */
module_param(forcev4l1, int, 0644);
MODULE_PARM_DESC(forcev4l1, "force use of V4L1 instead of V4L2");

/* number of grab buffers */
static unsigned int gbuffers = 2;
module_param(gbuffers, int, 0444);
MODULE_PARM_DESC(gbuffers, "number of capture buffers, default is 2 (32 max)");

/* size of a grab buffer */
static unsigned int gbufsize = MEYE_MAX_BUFSIZE;
module_param(gbufsize, int, 0444);
MODULE_PARM_DESC(gbufsize, "size of the capture buffers, default is 614400"
             " (will be rounded up to a page multiple)");

/* /dev/videoX registration number */
static int video_nr = -1;
module_param(video_nr, int, 0444);
MODULE_PARM_DESC(video_nr, "video device to register (0=/dev/video0, etc)");

/* driver structure - only one possible */
static struct meye meye;

/****************************************************************************/
/* Memory allocation routines (stolen from bttv-driver.c)                   */
/****************************************************************************/
static void *rvmalloc(unsigned long size)
{
      void *mem;
      unsigned long adr;

      size = PAGE_ALIGN(size);
      mem = vmalloc_32(size);
      if (mem) {
            memset(mem, 0, size);
            adr = (unsigned long) mem;
            while (size > 0) {
                  SetPageReserved(vmalloc_to_page((void *)adr));
                  adr += PAGE_SIZE;
                  size -= PAGE_SIZE;
            }
      }
      return mem;
}

static void rvfree(void * mem, unsigned long size)
{
      unsigned long adr;

      if (mem) {
            adr = (unsigned long) mem;
            while ((long) size > 0) {
                  ClearPageReserved(vmalloc_to_page((void *)adr));
                  adr += PAGE_SIZE;
                  size -= PAGE_SIZE;
            }
            vfree(mem);
      }
}

/*
 * return a page table pointing to N pages of locked memory
 *
 * NOTE: The meye device expects DMA addresses on 32 bits, we build
 * a table of 1024 entries = 4 bytes * 1024 = 4096 bytes.
 */
static int ptable_alloc(void)
{
      u32 *pt;
      int i;

      memset(meye.mchip_ptable, 0, sizeof(meye.mchip_ptable));

      /* give only 32 bit DMA addresses */
      if (dma_set_mask(&meye.mchip_dev->dev, DMA_32BIT_MASK))
            return -1;

      meye.mchip_ptable_toc = dma_alloc_coherent(&meye.mchip_dev->dev,
                                       PAGE_SIZE,
                                       &meye.mchip_dmahandle,
                                       GFP_KERNEL);
      if (!meye.mchip_ptable_toc) {
            meye.mchip_dmahandle = 0;
            return -1;
      }

      pt = meye.mchip_ptable_toc;
      for (i = 0; i < MCHIP_NB_PAGES; i++) {
            dma_addr_t dma;
            meye.mchip_ptable[i] = dma_alloc_coherent(&meye.mchip_dev->dev,
                                            PAGE_SIZE,
                                            &dma,
                                            GFP_KERNEL);
            if (!meye.mchip_ptable[i]) {
                  int j;
                  pt = meye.mchip_ptable_toc;
                  for (j = 0; j < i; ++j) {
                        dma = (dma_addr_t) *pt;
                        dma_free_coherent(&meye.mchip_dev->dev,
                                      PAGE_SIZE,
                                      meye.mchip_ptable[j], dma);
                        pt++;
                  }
                  dma_free_coherent(&meye.mchip_dev->dev,
                                PAGE_SIZE,
                                meye.mchip_ptable_toc,
                                meye.mchip_dmahandle);
                  meye.mchip_ptable_toc = NULL;
                  meye.mchip_dmahandle = 0;
                  return -1;
            }
            *pt = (u32) dma;
            pt++;
      }
      return 0;
}

static void ptable_free(void)
{
      u32 *pt;
      int i;

      pt = meye.mchip_ptable_toc;
      for (i = 0; i < MCHIP_NB_PAGES; i++) {
            dma_addr_t dma = (dma_addr_t) *pt;
            if (meye.mchip_ptable[i])
                  dma_free_coherent(&meye.mchip_dev->dev,
                                PAGE_SIZE,
                                meye.mchip_ptable[i], dma);
            pt++;
      }

      if (meye.mchip_ptable_toc)
            dma_free_coherent(&meye.mchip_dev->dev,
                          PAGE_SIZE,
                          meye.mchip_ptable_toc,
                          meye.mchip_dmahandle);

      memset(meye.mchip_ptable, 0, sizeof(meye.mchip_ptable));
      meye.mchip_ptable_toc = NULL;
      meye.mchip_dmahandle = 0;
}

/* copy data from ptable into buf */
static void ptable_copy(u8 *buf, int start, int size, int pt_pages)
{
      int i;

      for (i = 0; i < (size / PAGE_SIZE) * PAGE_SIZE; i += PAGE_SIZE) {
            memcpy(buf + i, meye.mchip_ptable[start++], PAGE_SIZE);
            if (start >= pt_pages)
                  start = 0;
      }
      memcpy(buf + i, meye.mchip_ptable[start], size % PAGE_SIZE);
}

/****************************************************************************/
/* JPEG tables at different qualities to load into the VRJ chip             */
/****************************************************************************/

/* return a set of quantisation tables based on a quality from 1 to 10 */
static u16 *jpeg_quantisation_tables(int *length, int quality)
{
      static u16 jpeg_tables[][70] = { {
            0xdbff, 0x4300, 0xff00, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff,
            0xdbff, 0x4300, 0xff01, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff,
      },
      {
            0xdbff, 0x4300, 0x5000, 0x3c37, 0x3c46, 0x5032, 0x4146, 0x5a46,
            0x5055, 0x785f, 0x82c8, 0x6e78, 0x786e, 0xaff5, 0x91b9, 0xffc8,
            0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff,
            0xdbff, 0x4300, 0x5501, 0x5a5a, 0x6978, 0xeb78, 0x8282, 0xffeb,
            0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
            0xffff, 0xffff, 0xffff,
      },
      {
            0xdbff, 0x4300, 0x2800, 0x1e1c, 0x1e23, 0x2819, 0x2123, 0x2d23,
            0x282b, 0x3c30, 0x4164, 0x373c, 0x3c37, 0x587b, 0x495d, 0x9164,
            0x9980, 0x8f96, 0x8c80, 0xa08a, 0xe6b4, 0xa0c3, 0xdaaa, 0x8aad,
            0xc88c, 0xcbff, 0xeeda, 0xfff5, 0xffff, 0xc19b, 0xffff, 0xfaff,
            0xe6ff, 0xfffd, 0xfff8,
            0xdbff, 0x4300, 0x2b01, 0x2d2d, 0x353c, 0x763c, 0x4141, 0xf876,
            0x8ca5, 0xf8a5, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8,
            0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8,
            0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8,
            0xf8f8, 0xf8f8, 0xfff8,
      },
      {
            0xdbff, 0x4300, 0x1b00, 0x1412, 0x1417, 0x1b11, 0x1617, 0x1e17,
            0x1b1c, 0x2820, 0x2b42, 0x2528, 0x2825, 0x3a51, 0x303d, 0x6042,
            0x6555, 0x5f64, 0x5d55, 0x6a5b, 0x9978, 0x6a81, 0x9071, 0x5b73,
            0x855d, 0x86b5, 0x9e90, 0xaba3, 0xabad, 0x8067, 0xc9bc, 0xa6ba,
            0x99c7, 0xaba8, 0xffa4,
            0xdbff, 0x4300, 0x1c01, 0x1e1e, 0x2328, 0x4e28, 0x2b2b, 0xa44e,
            0x5d6e, 0xa46e, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4,
            0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4,
            0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4,
            0xa4a4, 0xa4a4, 0xffa4,
      },
      {
            0xdbff, 0x4300, 0x1400, 0x0f0e, 0x0f12, 0x140d, 0x1012, 0x1712,
            0x1415, 0x1e18, 0x2132, 0x1c1e, 0x1e1c, 0x2c3d, 0x242e, 0x4932,
            0x4c40, 0x474b, 0x4640, 0x5045, 0x735a, 0x5062, 0x6d55, 0x4556,
            0x6446, 0x6588, 0x776d, 0x817b, 0x8182, 0x604e, 0x978d, 0x7d8c,
            0x7396, 0x817e, 0xff7c,
            0xdbff, 0x4300, 0x1501, 0x1717, 0x1a1e, 0x3b1e, 0x2121, 0x7c3b,
            0x4653, 0x7c53, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c,
            0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c,
            0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c,
            0x7c7c, 0x7c7c, 0xff7c,
      },
      {
            0xdbff, 0x4300, 0x1000, 0x0c0b, 0x0c0e, 0x100a, 0x0d0e, 0x120e,
            0x1011, 0x1813, 0x1a28, 0x1618, 0x1816, 0x2331, 0x1d25, 0x3a28,
            0x3d33, 0x393c, 0x3833, 0x4037, 0x5c48, 0x404e, 0x5744, 0x3745,
            0x5038, 0x516d, 0x5f57, 0x6762, 0x6768, 0x4d3e, 0x7971, 0x6470,
            0x5c78, 0x6765, 0xff63,
            0xdbff, 0x4300, 0x1101, 0x1212, 0x1518, 0x2f18, 0x1a1a, 0x632f,
            0x3842, 0x6342, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363,
            0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363,
            0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363,
            0x6363, 0x6363, 0xff63,
      },
      {
            0xdbff, 0x4300, 0x0d00, 0x0a09, 0x0a0b, 0x0d08, 0x0a0b, 0x0e0b,
            0x0d0e, 0x130f, 0x1520, 0x1213, 0x1312, 0x1c27, 0x171e, 0x2e20,
            0x3129, 0x2e30, 0x2d29, 0x332c, 0x4a3a, 0x333e, 0x4636, 0x2c37,
            0x402d, 0x4157, 0x4c46, 0x524e, 0x5253, 0x3e32, 0x615a, 0x505a,
            0x4a60, 0x5251, 0xff4f,
            0xdbff, 0x4300, 0x0e01, 0x0e0e, 0x1113, 0x2613, 0x1515, 0x4f26,
            0x2d35, 0x4f35, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f,
            0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f,
            0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f,
            0x4f4f, 0x4f4f, 0xff4f,
      },
      {
            0xdbff, 0x4300, 0x0a00, 0x0707, 0x0708, 0x0a06, 0x0808, 0x0b08,
            0x0a0a, 0x0e0b, 0x1018, 0x0d0e, 0x0e0d, 0x151d, 0x1116, 0x2318,
            0x251f, 0x2224, 0x221f, 0x2621, 0x372b, 0x262f, 0x3429, 0x2129,
            0x3022, 0x3141, 0x3934, 0x3e3b, 0x3e3e, 0x2e25, 0x4944, 0x3c43,
            0x3748, 0x3e3d, 0xff3b,
            0xdbff, 0x4300, 0x0a01, 0x0b0b, 0x0d0e, 0x1c0e, 0x1010, 0x3b1c,
            0x2228, 0x3b28, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b,
            0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b,
            0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b,
            0x3b3b, 0x3b3b, 0xff3b,
      },
      {
            0xdbff, 0x4300, 0x0600, 0x0504, 0x0506, 0x0604, 0x0506, 0x0706,
            0x0607, 0x0a08, 0x0a10, 0x090a, 0x0a09, 0x0e14, 0x0c0f, 0x1710,
            0x1814, 0x1718, 0x1614, 0x1a16, 0x251d, 0x1a1f, 0x231b, 0x161c,
            0x2016, 0x202c, 0x2623, 0x2927, 0x292a, 0x1f19, 0x302d, 0x282d,
            0x2530, 0x2928, 0xff28,
            0xdbff, 0x4300, 0x0701, 0x0707, 0x080a, 0x130a, 0x0a0a, 0x2813,
            0x161a, 0x281a, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828,
            0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828,
            0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828,
            0x2828, 0x2828, 0xff28,
      },
      {
            0xdbff, 0x4300, 0x0300, 0x0202, 0x0203, 0x0302, 0x0303, 0x0403,
            0x0303, 0x0504, 0x0508, 0x0405, 0x0504, 0x070a, 0x0607, 0x0c08,
            0x0c0a, 0x0b0c, 0x0b0a, 0x0d0b, 0x120e, 0x0d10, 0x110e, 0x0b0e,
            0x100b, 0x1016, 0x1311, 0x1514, 0x1515, 0x0f0c, 0x1817, 0x1416,
            0x1218, 0x1514, 0xff14,
            0xdbff, 0x4300, 0x0301, 0x0404, 0x0405, 0x0905, 0x0505, 0x1409,
            0x0b0d, 0x140d, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414,
            0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414,
            0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414,
            0x1414, 0x1414, 0xff14,
      },
      {
            0xdbff, 0x4300, 0x0100, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
            0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
            0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
            0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
            0x0101, 0x0101, 0xff01,
            0xdbff, 0x4300, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
            0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
            0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
            0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
            0x0101, 0x0101, 0xff01,
      } };

      if (quality < 0 || quality > 10) {
            printk(KERN_WARNING
                   "meye: invalid quality level %d - using 8\n", quality);
            quality = 8;
      }

      *length = ARRAY_SIZE(jpeg_tables[quality]);
      return jpeg_tables[quality];
}

/* return a generic set of huffman tables */
static u16 *jpeg_huffman_tables(int *length)
{
      static u16 tables[] = {
            0xC4FF, 0xB500, 0x0010, 0x0102, 0x0303, 0x0402, 0x0503, 0x0405,
            0x0004, 0x0100, 0x017D, 0x0302, 0x0400, 0x0511, 0x2112, 0x4131,
            0x1306, 0x6151, 0x2207, 0x1471, 0x8132, 0xA191, 0x2308, 0xB142,
            0x15C1, 0xD152, 0x24F0, 0x6233, 0x8272, 0x0A09, 0x1716, 0x1918,
            0x251A, 0x2726, 0x2928, 0x342A, 0x3635, 0x3837, 0x3A39, 0x4443,
            0x4645, 0x4847, 0x4A49, 0x5453, 0x5655, 0x5857, 0x5A59, 0x6463,
            0x6665, 0x6867, 0x6A69, 0x7473, 0x7675, 0x7877, 0x7A79, 0x8483,
            0x8685, 0x8887, 0x8A89, 0x9392, 0x9594, 0x9796, 0x9998, 0xA29A,
            0xA4A3, 0xA6A5, 0xA8A7, 0xAAA9, 0xB3B2, 0xB5B4, 0xB7B6, 0xB9B8,
            0xC2BA, 0xC4C3, 0xC6C5, 0xC8C7, 0xCAC9, 0xD3D2, 0xD5D4, 0xD7D6,
            0xD9D8, 0xE1DA, 0xE3E2, 0xE5E4, 0xE7E6, 0xE9E8, 0xF1EA, 0xF3F2,
            0xF5F4, 0xF7F6, 0xF9F8, 0xFFFA,
            0xC4FF, 0xB500, 0x0011, 0x0102, 0x0402, 0x0304, 0x0704, 0x0405,
            0x0004, 0x0201, 0x0077, 0x0201, 0x1103, 0x0504, 0x3121, 0x1206,
            0x5141, 0x6107, 0x1371, 0x3222, 0x0881, 0x4214, 0xA191, 0xC1B1,
            0x2309, 0x5233, 0x15F0, 0x7262, 0x0AD1, 0x2416, 0xE134, 0xF125,
            0x1817, 0x1A19, 0x2726, 0x2928, 0x352A, 0x3736, 0x3938, 0x433A,
            0x4544, 0x4746, 0x4948, 0x534A, 0x5554, 0x5756, 0x5958, 0x635A,
            0x6564, 0x6766, 0x6968, 0x736A, 0x7574, 0x7776, 0x7978, 0x827A,
            0x8483, 0x8685, 0x8887, 0x8A89, 0x9392, 0x9594, 0x9796, 0x9998,
            0xA29A, 0xA4A3, 0xA6A5, 0xA8A7, 0xAAA9, 0xB3B2, 0xB5B4, 0xB7B6,
            0xB9B8, 0xC2BA, 0xC4C3, 0xC6C5, 0xC8C7, 0xCAC9, 0xD3D2, 0xD5D4,
            0xD7D6, 0xD9D8, 0xE2DA, 0xE4E3, 0xE6E5, 0xE8E7, 0xEAE9, 0xF3F2,
            0xF5F4, 0xF7F6, 0xF9F8, 0xFFFA,
            0xC4FF, 0x1F00, 0x0000, 0x0501, 0x0101, 0x0101, 0x0101, 0x0000,
            0x0000, 0x0000, 0x0000, 0x0201, 0x0403, 0x0605, 0x0807, 0x0A09,
            0xFF0B,
            0xC4FF, 0x1F00, 0x0001, 0x0103, 0x0101, 0x0101, 0x0101, 0x0101,
            0x0000, 0x0000, 0x0000, 0x0201, 0x0403, 0x0605, 0x0807, 0x0A09,
            0xFF0B
      };

      *length = ARRAY_SIZE(tables);
      return tables;
}

/****************************************************************************/
/* MCHIP low-level functions                                                */
/****************************************************************************/

/* returns the horizontal capture size */
static inline int mchip_hsize(void)
{
      return meye.params.subsample ? 320 : 640;
}

/* returns the vertical capture size */
static inline int mchip_vsize(void)
{
      return meye.params.subsample ? 240 : 480;
}

/* waits for a register to be available */
static void mchip_sync(int reg)
{
      u32 status;
      int i;

      if (reg == MCHIP_MM_FIFO_DATA) {
            for (i = 0; i < MCHIP_REG_TIMEOUT; i++) {
                  status = readl(meye.mchip_mmregs +
                               MCHIP_MM_FIFO_STATUS);
                  if (!(status & MCHIP_MM_FIFO_WAIT)) {
                        printk(KERN_WARNING "meye: fifo not ready\n");
                        return;
                  }
                  if (status & MCHIP_MM_FIFO_READY)
                        return;
                  udelay(1);
            }
      } else if (reg > 0x80) {
            u32 mask = (reg < 0x100) ? MCHIP_HIC_STATUS_MCC_RDY
                               : MCHIP_HIC_STATUS_VRJ_RDY;
            for (i = 0; i < MCHIP_REG_TIMEOUT; i++) {
                  status = readl(meye.mchip_mmregs + MCHIP_HIC_STATUS);
                  if (status & mask)
                        return;
                  udelay(1);
            }
      } else
            return;
      printk(KERN_WARNING
             "meye: mchip_sync() timeout on reg 0x%x status=0x%x\n",
             reg, status);
}

/* sets a value into the register */
static inline void mchip_set(int reg, u32 v)
{
      mchip_sync(reg);
      writel(v, meye.mchip_mmregs + reg);
}

/* get the register value */
static inline u32 mchip_read(int reg)
{
      mchip_sync(reg);
      return readl(meye.mchip_mmregs + reg);
}

/* wait for a register to become a particular value */
static inline int mchip_delay(u32 reg, u32 v)
{
      int n = 10;
      while (--n && mchip_read(reg) != v)
            udelay(1);
      return n;
}

/* setup subsampling */
static void mchip_subsample(void)
{
      mchip_set(MCHIP_MCC_R_SAMPLING, meye.params.subsample);
      mchip_set(MCHIP_MCC_R_XRANGE, mchip_hsize());
      mchip_set(MCHIP_MCC_R_YRANGE, mchip_vsize());
      mchip_set(MCHIP_MCC_B_XRANGE, mchip_hsize());
      mchip_set(MCHIP_MCC_B_YRANGE, mchip_vsize());
      mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE);
}

/* set the framerate into the mchip */
static void mchip_set_framerate(void)
{
      mchip_set(MCHIP_HIC_S_RATE, meye.params.framerate);
}

/* load some huffman and quantisation tables into the VRJ chip ready
   for JPEG compression */
static void mchip_load_tables(void)
{
      int i;
      int length;
      u16 *tables;

      tables = jpeg_huffman_tables(&length);
      for (i = 0; i < length; i++)
            writel(tables[i], meye.mchip_mmregs + MCHIP_VRJ_TABLE_DATA);

      tables = jpeg_quantisation_tables(&length, meye.params.quality);
      for (i = 0; i < length; i++)
            writel(tables[i], meye.mchip_mmregs + MCHIP_VRJ_TABLE_DATA);
}

/* setup the VRJ parameters in the chip */
static void mchip_vrj_setup(u8 mode)
{
      mchip_set(MCHIP_VRJ_BUS_MODE, 5);
      mchip_set(MCHIP_VRJ_SIGNAL_ACTIVE_LEVEL, 0x1f);
      mchip_set(MCHIP_VRJ_PDAT_USE, 1);
      mchip_set(MCHIP_VRJ_IRQ_FLAG, 0xa0);
      mchip_set(MCHIP_VRJ_MODE_SPECIFY, mode);
      mchip_set(MCHIP_VRJ_NUM_LINES, mchip_vsize());
      mchip_set(MCHIP_VRJ_NUM_PIXELS, mchip_hsize());
      mchip_set(MCHIP_VRJ_NUM_COMPONENTS, 0x1b);
      mchip_set(MCHIP_VRJ_LIMIT_COMPRESSED_LO, 0xFFFF);
      mchip_set(MCHIP_VRJ_LIMIT_COMPRESSED_HI, 0xFFFF);
      mchip_set(MCHIP_VRJ_COMP_DATA_FORMAT, 0xC);
      mchip_set(MCHIP_VRJ_RESTART_INTERVAL, 0);
      mchip_set(MCHIP_VRJ_SOF1, 0x601);
      mchip_set(MCHIP_VRJ_SOF2, 0x1502);
      mchip_set(MCHIP_VRJ_SOF3, 0x1503);
      mchip_set(MCHIP_VRJ_SOF4, 0x1596);
      mchip_set(MCHIP_VRJ_SOS, 0x0ed0);

      mchip_load_tables();
}

/* sets the DMA parameters into the chip */
static void mchip_dma_setup(dma_addr_t dma_addr)
{
      int i;

      mchip_set(MCHIP_MM_PT_ADDR, (u32)dma_addr);
      for (i = 0; i < 4; i++)
            mchip_set(MCHIP_MM_FIR(i), 0);
      meye.mchip_fnum = 0;
}

/* setup for DMA transfers - also zeros the framebuffer */
static int mchip_dma_alloc(void)
{
      if (!meye.mchip_dmahandle)
            if (ptable_alloc())
                  return -1;
      return 0;
}

/* frees the DMA buffer */
static void mchip_dma_free(void)
{
      if (meye.mchip_dmahandle) {
            mchip_dma_setup(0);
            ptable_free();
      }
}

/* stop any existing HIC action and wait for any dma to complete then
   reset the dma engine */
static void mchip_hic_stop(void)
{
      int i, j;

      meye.mchip_mode = MCHIP_HIC_MODE_NOOP;
      if (!(mchip_read(MCHIP_HIC_STATUS) & MCHIP_HIC_STATUS_BUSY))
            return;
      for (i = 0; i < 20; ++i) {
            mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_STOP);
            mchip_delay(MCHIP_HIC_CMD, 0);
            for (j = 0; j < 100; ++j) {
                  if (mchip_delay(MCHIP_HIC_STATUS,
                              MCHIP_HIC_STATUS_IDLE))
                        return;
                  msleep(1);
            }
            printk(KERN_ERR "meye: need to reset HIC!\n");

            mchip_set(MCHIP_HIC_CTL, MCHIP_HIC_CTL_SOFT_RESET);
            msleep(250);
      }
      printk(KERN_ERR "meye: resetting HIC hanged!\n");
}

/****************************************************************************/
/* MCHIP frame processing functions                                         */
/****************************************************************************/

/* get the next ready frame from the dma engine */
static u32 mchip_get_frame(void)
{
      u32 v;

      v = mchip_read(MCHIP_MM_FIR(meye.mchip_fnum));
      return v;
}

/* frees the current frame from the dma engine */
static void mchip_free_frame(void)
{
      mchip_set(MCHIP_MM_FIR(meye.mchip_fnum), 0);
      meye.mchip_fnum++;
      meye.mchip_fnum %= 4;
}

/* read one frame from the framebuffer assuming it was captured using
   a uncompressed transfer */
static void mchip_cont_read_frame(u32 v, u8 *buf, int size)
{
      int pt_id;

      pt_id = (v >> 17) & 0x3FF;

      ptable_copy(buf, pt_id, size, MCHIP_NB_PAGES);
}

/* read a compressed frame from the framebuffer */
static int mchip_comp_read_frame(u32 v, u8 *buf, int size)
{
      int pt_start, pt_end, trailer;
      int fsize;
      int i;

      pt_start = (v >> 19) & 0xFF;
      pt_end = (v >> 11) & 0xFF;
      trailer = (v >> 1) & 0x3FF;

      if (pt_end < pt_start)
            fsize = (MCHIP_NB_PAGES_MJPEG - pt_start) * PAGE_SIZE +
                  pt_end * PAGE_SIZE + trailer * 4;
      else
            fsize = (pt_end - pt_start) * PAGE_SIZE + trailer * 4;

      if (fsize > size) {
            printk(KERN_WARNING "meye: oversized compressed frame %d\n",
                   fsize);
            return -1;
      }

      ptable_copy(buf, pt_start, fsize, MCHIP_NB_PAGES_MJPEG);

#ifdef MEYE_JPEG_CORRECTION

      /* Some mchip generated jpeg frames are incorrect. In most
       * (all ?) of those cases, the final EOI (0xff 0xd9) marker
       * is not present at the end of the frame.
       *
       * Since adding the final marker is not enough to restore
       * the jpeg integrity, we drop the frame.
       */

      for (i = fsize - 1; i > 0 && buf[i] == 0xff; i--) ;

      if (i < 2 || buf[i - 1] != 0xff || buf[i] != 0xd9)
            return -1;

#endif

      return fsize;
}

/* take a picture into SDRAM */
static void mchip_take_picture(void)
{
      int i;

      mchip_hic_stop();
      mchip_subsample();
      mchip_dma_setup(meye.mchip_dmahandle);

      mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_STILL_CAP);
      mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);

      mchip_delay(MCHIP_HIC_CMD, 0);

      for (i = 0; i < 100; ++i) {
            if (mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE))
                  break;
            msleep(1);
      }
}

/* dma a previously taken picture into a buffer */
static void mchip_get_picture(u8 *buf, int bufsize)
{
      u32 v;
      int i;

      mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_STILL_OUT);
      mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);

      mchip_delay(MCHIP_HIC_CMD, 0);
      for (i = 0; i < 100; ++i) {
            if (mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE))
                  break;
            msleep(1);
      }
      for (i = 0; i < 4; ++i) {
            v = mchip_get_frame();
            if (v & MCHIP_MM_FIR_RDY) {
                  mchip_cont_read_frame(v, buf, bufsize);
                  break;
            }
            mchip_free_frame();
      }
}

/* start continuous dma capture */
static void mchip_continuous_start(void)
{
      mchip_hic_stop();
      mchip_subsample();
      mchip_set_framerate();
      mchip_dma_setup(meye.mchip_dmahandle);

      meye.mchip_mode = MCHIP_HIC_MODE_CONT_OUT;

      mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_CONT_OUT);
      mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);

      mchip_delay(MCHIP_HIC_CMD, 0);
}

/* compress one frame into a buffer */
static int mchip_compress_frame(u8 *buf, int bufsize)
{
      u32 v;
      int len = -1, i;

      mchip_vrj_setup(0x3f);
      udelay(50);

      mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_STILL_COMP);
      mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);

      mchip_delay(MCHIP_HIC_CMD, 0);
      for (i = 0; i < 100; ++i) {
            if (mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE))
                  break;
            msleep(1);
      }

      for (i = 0; i < 4; ++i) {
            v = mchip_get_frame();
            if (v & MCHIP_MM_FIR_RDY) {
                  len = mchip_comp_read_frame(v, buf, bufsize);
                  break;
            }
            mchip_free_frame();
      }
      return len;
}

#if 0
/* uncompress one image into a buffer */
static int mchip_uncompress_frame(u8 *img, int imgsize, u8 *buf, int bufsize)
{
      mchip_vrj_setup(0x3f);
      udelay(50);

      mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_STILL_DECOMP);
      mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);

      mchip_delay(MCHIP_HIC_CMD, 0);

      return mchip_comp_read_frame(buf, bufsize);
}
#endif

/* start continuous compressed capture */
static void mchip_cont_compression_start(void)
{
      mchip_hic_stop();
      mchip_vrj_setup(0x3f);
      mchip_subsample();
      mchip_set_framerate();
      mchip_dma_setup(meye.mchip_dmahandle);

      meye.mchip_mode = MCHIP_HIC_MODE_CONT_COMP;

      mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_CONT_COMP);
      mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);

      mchip_delay(MCHIP_HIC_CMD, 0);
}

/****************************************************************************/
/* Interrupt handling                                                       */
/****************************************************************************/

static irqreturn_t meye_irq(int irq, void *dev_id)
{
      u32 v;
      int reqnr;
      static int sequence = 0;

      v = mchip_read(MCHIP_MM_INTA);

      if (meye.mchip_mode != MCHIP_HIC_MODE_CONT_OUT &&
          meye.mchip_mode != MCHIP_HIC_MODE_CONT_COMP)
            return IRQ_NONE;

again:
      v = mchip_get_frame();
      if (!(v & MCHIP_MM_FIR_RDY))
            return IRQ_HANDLED;

      if (meye.mchip_mode == MCHIP_HIC_MODE_CONT_OUT) {
            if (kfifo_get(meye.grabq, (unsigned char *)&reqnr,
                        sizeof(int)) != sizeof(int)) {
                  mchip_free_frame();
                  return IRQ_HANDLED;
            }
            mchip_cont_read_frame(v, meye.grab_fbuffer + gbufsize * reqnr,
                              mchip_hsize() * mchip_vsize() * 2);
            meye.grab_buffer[reqnr].size = mchip_hsize() * mchip_vsize() * 2;
            meye.grab_buffer[reqnr].state = MEYE_BUF_DONE;
            do_gettimeofday(&meye.grab_buffer[reqnr].timestamp);
            meye.grab_buffer[reqnr].sequence = sequence++;
            kfifo_put(meye.doneq, (unsigned char *)&reqnr, sizeof(int));
            wake_up_interruptible(&meye.proc_list);
      } else {
            int size;
            size = mchip_comp_read_frame(v, meye.grab_temp, gbufsize);
            if (size == -1) {
                  mchip_free_frame();
                  goto again;
            }
            if (kfifo_get(meye.grabq, (unsigned char *)&reqnr,
                        sizeof(int)) != sizeof(int)) {
                  mchip_free_frame();
                  goto again;
            }
            memcpy(meye.grab_fbuffer + gbufsize * reqnr, meye.grab_temp,
                   size);
            meye.grab_buffer[reqnr].size = size;
            meye.grab_buffer[reqnr].state = MEYE_BUF_DONE;
            do_gettimeofday(&meye.grab_buffer[reqnr].timestamp);
            meye.grab_buffer[reqnr].sequence = sequence++;
            kfifo_put(meye.doneq, (unsigned char *)&reqnr, sizeof(int));
            wake_up_interruptible(&meye.proc_list);
      }
      mchip_free_frame();
      goto again;
}

/****************************************************************************/
/* video4linux integration                                                  */
/****************************************************************************/

static int meye_open(struct inode *inode, struct file *file)
{
      int i, err;

      err = video_exclusive_open(inode, file);
      if (err < 0)
            return err;

      mchip_hic_stop();

      if (mchip_dma_alloc()) {
            printk(KERN_ERR "meye: mchip framebuffer allocation failed\n");
            video_exclusive_release(inode, file);
            return -ENOBUFS;
      }

      for (i = 0; i < MEYE_MAX_BUFNBRS; i++)
            meye.grab_buffer[i].state = MEYE_BUF_UNUSED;
      kfifo_reset(meye.grabq);
      kfifo_reset(meye.doneq);
      return 0;
}

static int meye_release(struct inode *inode, struct file *file)
{
      mchip_hic_stop();
      mchip_dma_free();
      video_exclusive_release(inode, file);
      return 0;
}

static int meye_do_ioctl(struct inode *inode, struct file *file,
                   unsigned int cmd, void *arg)
{
      switch (cmd) {

      case VIDIOCGCAP: {
            struct video_capability *b = arg;
            strcpy(b->name,meye.video_dev->name);
            b->type = VID_TYPE_CAPTURE;
            b->channels = 1;
            b->audios = 0;
            b->maxwidth = 640;
            b->maxheight = 480;
            b->minwidth = 320;
            b->minheight = 240;
            break;
      }

      case VIDIOCGCHAN: {
            struct video_channel *v = arg;
            v->flags = 0;
            v->tuners = 0;
            v->type = VIDEO_TYPE_CAMERA;
            if (v->channel != 0)
                  return -EINVAL;
            strcpy(v->name,"Camera");
            break;
      }

      case VIDIOCSCHAN: {
            struct video_channel *v = arg;
            if (v->channel != 0)
                  return -EINVAL;
            break;
      }

      case VIDIOCGPICT: {
            struct video_picture *p = arg;
            *p = meye.picture;
            break;
      }

      case VIDIOCSPICT: {
            struct video_picture *p = arg;
            if (p->depth != 16)
                  return -EINVAL;
            if (p->palette != VIDEO_PALETTE_YUV422 && p->palette != VIDEO_PALETTE_YUYV)
                  return -EINVAL;
            mutex_lock(&meye.lock);
            sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERABRIGHTNESS,
                              p->brightness >> 10);
            sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAHUE,
                              p->hue >> 10);
            sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERACOLOR,
                              p->colour >> 10);
            sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERACONTRAST,
                              p->contrast >> 10);
            meye.picture = *p;
            mutex_unlock(&meye.lock);
            break;
      }

      case VIDIOCSYNC: {
            int *i = arg;
            int unused;

            if (*i < 0 || *i >= gbuffers)
                  return -EINVAL;

            mutex_lock(&meye.lock);

            switch (meye.grab_buffer[*i].state) {

            case MEYE_BUF_UNUSED:
                  mutex_unlock(&meye.lock);
                  return -EINVAL;
            case MEYE_BUF_USING:
                  if (file->f_flags & O_NONBLOCK) {
                        mutex_unlock(&meye.lock);
                        return -EAGAIN;
                  }
                  if (wait_event_interruptible(meye.proc_list,
                                         (meye.grab_buffer[*i].state != MEYE_BUF_USING))) {
                        mutex_unlock(&meye.lock);
                        return -EINTR;
                  }
                  /* fall through */
            case MEYE_BUF_DONE:
                  meye.grab_buffer[*i].state = MEYE_BUF_UNUSED;
                  kfifo_get(meye.doneq, (unsigned char *)&unused, sizeof(int));
            }
            mutex_unlock(&meye.lock);
            break;
      }

      case VIDIOCMCAPTURE: {
            struct video_mmap *vm = arg;
            int restart = 0;

            if (vm->frame >= gbuffers || vm->frame < 0)
                  return -EINVAL;
            if (vm->format != VIDEO_PALETTE_YUV422 && vm->format != VIDEO_PALETTE_YUYV)
                  return -EINVAL;
            if (vm->height * vm->width * 2 > gbufsize)
                  return -EINVAL;
            if (!meye.grab_fbuffer)
                  return -EINVAL;
            if (meye.grab_buffer[vm->frame].state != MEYE_BUF_UNUSED)
                  return -EBUSY;

            mutex_lock(&meye.lock);
            if (vm->width == 640 && vm->height == 480) {
                  if (meye.params.subsample) {
                        meye.params.subsample = 0;
                        restart = 1;
                  }
            } else if (vm->width == 320 && vm->height == 240) {
                  if (!meye.params.subsample) {
                        meye.params.subsample = 1;
                        restart = 1;
                  }
            } else {
                  mutex_unlock(&meye.lock);
                  return -EINVAL;
            }

            if (restart || meye.mchip_mode != MCHIP_HIC_MODE_CONT_OUT)
                  mchip_continuous_start();
            meye.grab_buffer[vm->frame].state = MEYE_BUF_USING;
            kfifo_put(meye.grabq, (unsigned char *)&vm->frame, sizeof(int));
            mutex_unlock(&meye.lock);
            break;
      }

      case VIDIOCGMBUF: {
            struct video_mbuf *vm = arg;
            int i;

            memset(vm, 0 , sizeof(*vm));
            vm->size = gbufsize * gbuffers;
            vm->frames = gbuffers;
            for (i = 0; i < gbuffers; i++)
                  vm->offsets[i] = i * gbufsize;
            break;
      }

      case MEYEIOC_G_PARAMS: {
            struct meye_params *p = arg;
            *p = meye.params;
            break;
      }

      case MEYEIOC_S_PARAMS: {
            struct meye_params *jp = arg;
            if (jp->subsample > 1)
                  return -EINVAL;
            if (jp->quality > 10)
                  return -EINVAL;
            if (jp->sharpness > 63 || jp->agc > 63 || jp->picture > 63)
                  return -EINVAL;
            if (jp->framerate > 31)
                  return -EINVAL;
            mutex_lock(&meye.lock);
            if (meye.params.subsample != jp->subsample ||
                meye.params.quality != jp->quality)
                  mchip_hic_stop(); /* need restart */
            meye.params = *jp;
            sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERASHARPNESS,
                              meye.params.sharpness);
            sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAAGC,
                              meye.params.agc);
            sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAPICTURE,
                              meye.params.picture);
            mutex_unlock(&meye.lock);
            break;
      }

      case MEYEIOC_QBUF_CAPT: {
            int *nb = arg;

            if (!meye.grab_fbuffer)
                  return -EINVAL;
            if (*nb >= gbuffers)
                  return -EINVAL;
            if (*nb < 0) {
                  /* stop capture */
                  mchip_hic_stop();
                  return 0;
            }
            if (meye.grab_buffer[*nb].state != MEYE_BUF_UNUSED)
                  return -EBUSY;
            mutex_lock(&meye.lock);
            if (meye.mchip_mode != MCHIP_HIC_MODE_CONT_COMP)
                  mchip_cont_compression_start();
            meye.grab_buffer[*nb].state = MEYE_BUF_USING;
            kfifo_put(meye.grabq, (unsigned char *)nb, sizeof(int));
            mutex_unlock(&meye.lock);
            break;
      }

      case MEYEIOC_SYNC: {
            int *i = arg;
            int unused;

            if (*i < 0 || *i >= gbuffers)
                  return -EINVAL;

            mutex_lock(&meye.lock);
            switch (meye.grab_buffer[*i].state) {

            case MEYE_BUF_UNUSED:
                  mutex_unlock(&meye.lock);
                  return -EINVAL;
            case MEYE_BUF_USING:
                  if (file->f_flags & O_NONBLOCK) {
                        mutex_unlock(&meye.lock);
                        return -EAGAIN;
                  }
                  if (wait_event_interruptible(meye.proc_list,
                                         (meye.grab_buffer[*i].state != MEYE_BUF_USING))) {
                        mutex_unlock(&meye.lock);
                        return -EINTR;
                  }
                  /* fall through */
            case MEYE_BUF_DONE:
                  meye.grab_buffer[*i].state = MEYE_BUF_UNUSED;
                  kfifo_get(meye.doneq, (unsigned char *)&unused, sizeof(int));
            }
            *i = meye.grab_buffer[*i].size;
            mutex_unlock(&meye.lock);
            break;
      }

      case MEYEIOC_STILLCAPT: {

            if (!meye.grab_fbuffer)
                  return -EINVAL;
            if (meye.grab_buffer[0].state != MEYE_BUF_UNUSED)
                  return -EBUSY;
            mutex_lock(&meye.lock);
            meye.grab_buffer[0].state = MEYE_BUF_USING;
            mchip_take_picture();
            mchip_get_picture(
                  meye.grab_fbuffer,
                  mchip_hsize() * mchip_vsize() * 2);
            meye.grab_buffer[0].state = MEYE_BUF_DONE;
            mutex_unlock(&meye.lock);
            break;
      }

      case MEYEIOC_STILLJCAPT: {
            int *len = arg;

            if (!meye.grab_fbuffer)
                  return -EINVAL;
            if (meye.grab_buffer[0].state != MEYE_BUF_UNUSED)
                  return -EBUSY;
            mutex_lock(&meye.lock);
            meye.grab_buffer[0].state = MEYE_BUF_USING;
            *len = -1;
            while (*len == -1) {
                  mchip_take_picture();
                  *len = mchip_compress_frame(meye.grab_fbuffer, gbufsize);
            }
            meye.grab_buffer[0].state = MEYE_BUF_DONE;
            mutex_unlock(&meye.lock);
            break;
      }

      case VIDIOC_QUERYCAP: {
            struct v4l2_capability *cap = arg;

            if (forcev4l1)
                  return -EINVAL;

            memset(cap, 0, sizeof(*cap));
            strcpy(cap->driver, "meye");
            strcpy(cap->card, "meye");
            sprintf(cap->bus_info, "PCI:%s", pci_name(meye.mchip_dev));
            cap->version = (MEYE_DRIVER_MAJORVERSION << 8) +
                         MEYE_DRIVER_MINORVERSION;
            cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
                            V4L2_CAP_STREAMING;
            break;
      }

      case VIDIOC_ENUMINPUT: {
            struct v4l2_input *i = arg;

            if (i->index != 0)
                  return -EINVAL;
            memset(i, 0, sizeof(*i));
            i->index = 0;
            strcpy(i->name, "Camera");
            i->type = V4L2_INPUT_TYPE_CAMERA;
            break;
      }

      case VIDIOC_G_INPUT: {
            int *i = arg;

            *i = 0;
            break;
      }

      case VIDIOC_S_INPUT: {
            int *i = arg;

            if (*i != 0)
                  return -EINVAL;
            break;
      }

      case VIDIOC_QUERYCTRL: {
            struct v4l2_queryctrl *c = arg;

            switch (c->id) {

            case V4L2_CID_BRIGHTNESS:
                  c->type = V4L2_CTRL_TYPE_INTEGER;
                  strcpy(c->name, "Brightness");
                  c->minimum = 0;
                  c->maximum = 63;
                  c->step = 1;
                  c->default_value = 32;
                  c->flags = 0;
                  break;
            case V4L2_CID_HUE:
                  c->type = V4L2_CTRL_TYPE_INTEGER;
                  strcpy(c->name, "Hue");
                  c->minimum = 0;
                  c->maximum = 63;
                  c->step = 1;
                  c->default_value = 32;
                  c->flags = 0;
                  break;
            case V4L2_CID_CONTRAST:
                  c->type = V4L2_CTRL_TYPE_INTEGER;
                  strcpy(c->name, "Contrast");
                  c->minimum = 0;
                  c->maximum = 63;
                  c->step = 1;
                  c->default_value = 32;
                  c->flags = 0;
                  break;
            case V4L2_CID_SATURATION:
                  c->type = V4L2_CTRL_TYPE_INTEGER;
                  strcpy(c->name, "Saturation");
                  c->minimum = 0;
                  c->maximum = 63;
                  c->step = 1;
                  c->default_value = 32;
                  c->flags = 0;
                  break;
            case V4L2_CID_AGC:
                  c->type = V4L2_CTRL_TYPE_INTEGER;
                  strcpy(c->name, "Agc");
                  c->minimum = 0;
                  c->maximum = 63;
                  c->step = 1;
                  c->default_value = 48;
                  c->flags = 0;
                  break;
            case V4L2_CID_SHARPNESS:
                  c->type = V4L2_CTRL_TYPE_INTEGER;
                  strcpy(c->name, "Sharpness");
                  c->minimum = 0;
                  c->maximum = 63;
                  c->step = 1;
                  c->default_value = 32;
                  c->flags = 0;
                  break;
            case V4L2_CID_PICTURE:
                  c->type = V4L2_CTRL_TYPE_INTEGER;
                  strcpy(c->name, "Picture");
                  c->minimum = 0;
                  c->maximum = 63;
                  c->step = 1;
                  c->default_value = 0;
                  c->flags = 0;
                  break;
            case V4L2_CID_JPEGQUAL:
                  c->type = V4L2_CTRL_TYPE_INTEGER;
                  strcpy(c->name, "JPEG quality");
                  c->minimum = 0;
                  c->maximum = 10;
                  c->step = 1;
                  c->default_value = 8;
                  c->flags = 0;
                  break;
            case V4L2_CID_FRAMERATE:
                  c->type = V4L2_CTRL_TYPE_INTEGER;
                  strcpy(c->name, "Framerate");
                  c->minimum = 0;
                  c->maximum = 31;
                  c->step = 1;
                  c->default_value = 0;
                  c->flags = 0;
                  break;
            default:
                  return -EINVAL;
            }
            break;
      }

      case VIDIOC_S_CTRL: {
            struct v4l2_control *c = arg;

            mutex_lock(&meye.lock);
            switch (c->id) {
            case V4L2_CID_BRIGHTNESS:
                  sony_pic_camera_command(
                        SONY_PIC_COMMAND_SETCAMERABRIGHTNESS, c->value);
                  meye.picture.brightness = c->value << 10;
                  break;
            case V4L2_CID_HUE:
                  sony_pic_camera_command(
                        SONY_PIC_COMMAND_SETCAMERAHUE, c->value);
                  meye.picture.hue = c->value << 10;
                  break;
            case V4L2_CID_CONTRAST:
                  sony_pic_camera_command(
                        SONY_PIC_COMMAND_SETCAMERACONTRAST, c->value);
                  meye.picture.contrast = c->value << 10;
                  break;
            case V4L2_CID_SATURATION:
                  sony_pic_camera_command(
                        SONY_PIC_COMMAND_SETCAMERACOLOR, c->value);
                  meye.picture.colour = c->value << 10;
                  break;
            case V4L2_CID_AGC:
                  sony_pic_camera_command(
                        SONY_PIC_COMMAND_SETCAMERAAGC, c->value);
                  meye.params.agc = c->value;
                  break;
            case V4L2_CID_SHARPNESS:
                  sony_pic_camera_command(
                        SONY_PIC_COMMAND_SETCAMERASHARPNESS, c->value);
                  meye.params.sharpness = c->value;
                  break;
            case V4L2_CID_PICTURE:
                  sony_pic_camera_command(
                        SONY_PIC_COMMAND_SETCAMERAPICTURE, c->value);
                  meye.params.picture = c->value;
                  break;
            case V4L2_CID_JPEGQUAL:
                  meye.params.quality = c->value;
                  break;
            case V4L2_CID_FRAMERATE:
                  meye.params.framerate = c->value;
                  break;
            default:
                  mutex_unlock(&meye.lock);
                  return -EINVAL;
            }
            mutex_unlock(&meye.lock);
            break;
      }

      case VIDIOC_G_CTRL: {
            struct v4l2_control *c = arg;

            mutex_lock(&meye.lock);
            switch (c->id) {
            case V4L2_CID_BRIGHTNESS:
                  c->value = meye.picture.brightness >> 10;
                  break;
            case V4L2_CID_HUE:
                  c->value = meye.picture.hue >> 10;
                  break;
            case V4L2_CID_CONTRAST:
                  c->value = meye.picture.contrast >> 10;
                  break;
            case V4L2_CID_SATURATION:
                  c->value = meye.picture.colour >> 10;
                  break;
            case V4L2_CID_AGC:
                  c->value = meye.params.agc;
                  break;
            case V4L2_CID_SHARPNESS:
                  c->value = meye.params.sharpness;
                  break;
            case V4L2_CID_PICTURE:
                  c->value = meye.params.picture;
                  break;
            case V4L2_CID_JPEGQUAL:
                  c->value = meye.params.quality;
                  break;
            case V4L2_CID_FRAMERATE:
                  c->value = meye.params.framerate;
                  break;
            default:
                  mutex_unlock(&meye.lock);
                  return -EINVAL;
            }
            mutex_unlock(&meye.lock);
            break;
      }

      case VIDIOC_ENUM_FMT: {
            struct v4l2_fmtdesc *f = arg;

            if (f->index > 1)
                  return -EINVAL;
            if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                  return -EINVAL;
            if (f->index == 0) {
                  /* standard YUV 422 capture */
                  memset(f, 0, sizeof(*f));
                  f->index = 0;
                  f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
                  f->flags = 0;
                  strcpy(f->description, "YUV422");
                  f->pixelformat = V4L2_PIX_FMT_YUYV;
            } else {
                  /* compressed MJPEG capture */
                  memset(f, 0, sizeof(*f));
                  f->index = 1;
                  f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
                  f->flags = V4L2_FMT_FLAG_COMPRESSED;
                  strcpy(f->description, "MJPEG");
                  f->pixelformat = V4L2_PIX_FMT_MJPEG;
            }
            break;
      }

      case VIDIOC_TRY_FMT: {
            struct v4l2_format *f = arg;

            if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                  return -EINVAL;
            if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_YUYV &&
                f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG)
                  return -EINVAL;
            if (f->fmt.pix.field != V4L2_FIELD_ANY &&
                f->fmt.pix.field != V4L2_FIELD_NONE)
                  return -EINVAL;
            f->fmt.pix.field = V4L2_FIELD_NONE;
            if (f->fmt.pix.width <= 320) {
                  f->fmt.pix.width = 320;
                  f->fmt.pix.height = 240;
            } else {
                  f->fmt.pix.width = 640;
                  f->fmt.pix.height = 480;
            }
            f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
            f->fmt.pix.sizeimage = f->fmt.pix.height *
                               f->fmt.pix.bytesperline;
            f->fmt.pix.colorspace = 0;
            f->fmt.pix.priv = 0;
            break;
      }

      case VIDIOC_G_FMT: {
            struct v4l2_format *f = arg;

            if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                  return -EINVAL;
            memset(&f->fmt.pix, 0, sizeof(struct v4l2_pix_format));
            f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
            switch (meye.mchip_mode) {
            case MCHIP_HIC_MODE_CONT_OUT:
            default:
                  f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
                  break;
            case MCHIP_HIC_MODE_CONT_COMP:
                  f->fmt.pix.pixelformat = V4L2_PIX_FMT_MJPEG;
                  break;
            }
            f->fmt.pix.field = V4L2_FIELD_NONE;
            f->fmt.pix.width = mchip_hsize();
            f->fmt.pix.height = mchip_vsize();
            f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
            f->fmt.pix.sizeimage = f->fmt.pix.height *
                               f->fmt.pix.bytesperline;
            f->fmt.pix.colorspace = 0;
            f->fmt.pix.priv = 0;
            break;
      }

      case VIDIOC_S_FMT: {
            struct v4l2_format *f = arg;

            if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                  return -EINVAL;
            if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_YUYV &&
                f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG)
                  return -EINVAL;
            if (f->fmt.pix.field != V4L2_FIELD_ANY &&
                f->fmt.pix.field != V4L2_FIELD_NONE)
                  return -EINVAL;
            f->fmt.pix.field = V4L2_FIELD_NONE;
            mutex_lock(&meye.lock);
            if (f->fmt.pix.width <= 320) {
                  f->fmt.pix.width = 320;
                  f->fmt.pix.height = 240;
                  meye.params.subsample = 1;
            } else {
                  f->fmt.pix.width = 640;
                  f->fmt.pix.height = 480;
                  meye.params.subsample = 0;
            }
            switch (f->fmt.pix.pixelformat) {
            case V4L2_PIX_FMT_YUYV:
                  meye.mchip_mode = MCHIP_HIC_MODE_CONT_OUT;
                  break;
            case V4L2_PIX_FMT_MJPEG:
                  meye.mchip_mode = MCHIP_HIC_MODE_CONT_COMP;
                  break;
            }
            mutex_unlock(&meye.lock);
            f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
            f->fmt.pix.sizeimage = f->fmt.pix.height *
                               f->fmt.pix.bytesperline;
            f->fmt.pix.colorspace = 0;
            f->fmt.pix.priv = 0;

            break;
      }

      case VIDIOC_REQBUFS: {
            struct v4l2_requestbuffers *req = arg;
            int i;

            if (req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                  return -EINVAL;
            if (req->memory != V4L2_MEMORY_MMAP)
                  return -EINVAL;
            if (meye.grab_fbuffer && req->count == gbuffers) {
                  /* already allocated, no modifications */
                  break;
            }
            mutex_lock(&meye.lock);
            if (meye.grab_fbuffer) {
                  for (i = 0; i < gbuffers; i++)
                        if (meye.vma_use_count[i]) {
                              mutex_unlock(&meye.lock);
                              return -EINVAL;
                        }
                  rvfree(meye.grab_fbuffer, gbuffers * gbufsize);
                  meye.grab_fbuffer = NULL;
            }
            gbuffers = max(2, min((int)req->count, MEYE_MAX_BUFNBRS));
            req->count = gbuffers;
            meye.grab_fbuffer = rvmalloc(gbuffers * gbufsize);
            if (!meye.grab_fbuffer) {
                  printk(KERN_ERR "meye: v4l framebuffer allocation"
                              " failed\n");
                  mutex_unlock(&meye.lock);
                  return -ENOMEM;
            }
            for (i = 0; i < gbuffers; i++)
                  meye.vma_use_count[i] = 0;
            mutex_unlock(&meye.lock);
            break;
      }

      case VIDIOC_QUERYBUF: {
            struct v4l2_buffer *buf = arg;
            int index = buf->index;

            if (index < 0 || index >= gbuffers)
                  return -EINVAL;
            memset(buf, 0, sizeof(*buf));
            buf->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
            buf->index = index;
            buf->bytesused = meye.grab_buffer[index].size;
            buf->flags = V4L2_BUF_FLAG_MAPPED;
            if (meye.grab_buffer[index].state == MEYE_BUF_USING)
                  buf->flags |= V4L2_BUF_FLAG_QUEUED;
            if (meye.grab_buffer[index].state == MEYE_BUF_DONE)
                  buf->flags |= V4L2_BUF_FLAG_DONE;
            buf->field = V4L2_FIELD_NONE;
            buf->timestamp = meye.grab_buffer[index].timestamp;
            buf->sequence = meye.grab_buffer[index].sequence;
            buf->memory = V4L2_MEMORY_MMAP;
            buf->m.offset = index * gbufsize;
            buf->length = gbufsize;
            break;
      }

      case VIDIOC_QBUF: {
            struct v4l2_buffer *buf = arg;

            if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                  return -EINVAL;
            if (buf->memory != V4L2_MEMORY_MMAP)
                  return -EINVAL;
            if (buf->index < 0 || buf->index >= gbuffers)
                  return -EINVAL;
            if (meye.grab_buffer[buf->index].state != MEYE_BUF_UNUSED)
                  return -EINVAL;
            mutex_lock(&meye.lock);
            buf->flags |= V4L2_BUF_FLAG_QUEUED;
            buf->flags &= ~V4L2_BUF_FLAG_DONE;
            meye.grab_buffer[buf->index].state = MEYE_BUF_USING;
            kfifo_put(meye.grabq, (unsigned char *)&buf->index, sizeof(int));
            mutex_unlock(&meye.lock);
            break;
      }

      case VIDIOC_DQBUF: {
            struct v4l2_buffer *buf = arg;
            int reqnr;

            if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                  return -EINVAL;
            if (buf->memory != V4L2_MEMORY_MMAP)
                  return -EINVAL;

            mutex_lock(&meye.lock);
            if (kfifo_len(meye.doneq) == 0 && file->f_flags & O_NONBLOCK) {
                  mutex_unlock(&meye.lock);
                  return -EAGAIN;
            }
            if (wait_event_interruptible(meye.proc_list,
                                   kfifo_len(meye.doneq) != 0) < 0) {
                  mutex_unlock(&meye.lock);
                  return -EINTR;
            }
            if (!kfifo_get(meye.doneq, (unsigned char *)&reqnr,
                         sizeof(int))) {
                  mutex_unlock(&meye.lock);
                  return -EBUSY;
            }
            if (meye.grab_buffer[reqnr].state != MEYE_BUF_DONE) {
                  mutex_unlock(&meye.lock);
                  return -EINVAL;
            }
            buf->index = reqnr;
            buf->bytesused = meye.grab_buffer[reqnr].size;
            buf->flags = V4L2_BUF_FLAG_MAPPED;
            buf->field = V4L2_FIELD_NONE;
            buf->timestamp = meye.grab_buffer[reqnr].timestamp;
            buf->sequence = meye.grab_buffer[reqnr].sequence;
            buf->memory = V4L2_MEMORY_MMAP;
            buf->m.offset = reqnr * gbufsize;
            buf->length = gbufsize;
            meye.grab_buffer[reqnr].state = MEYE_BUF_UNUSED;
            mutex_unlock(&meye.lock);
            break;
      }

      case VIDIOC_STREAMON: {
            mutex_lock(&meye.lock);
            switch (meye.mchip_mode) {
            case MCHIP_HIC_MODE_CONT_OUT:
                  mchip_continuous_start();
                  break;
            case MCHIP_HIC_MODE_CONT_COMP:
                  mchip_cont_compression_start();
                  break;
            default:
                  mutex_unlock(&meye.lock);
                  return -EINVAL;
            }
            mutex_unlock(&meye.lock);
            break;
      }

      case VIDIOC_STREAMOFF: {
            int i;

            mutex_lock(&meye.lock);
            mchip_hic_stop();
            kfifo_reset(meye.grabq);
            kfifo_reset(meye.doneq);
            for (i = 0; i < MEYE_MAX_BUFNBRS; i++)
                  meye.grab_buffer[i].state = MEYE_BUF_UNUSED;
            mutex_unlock(&meye.lock);
            break;
      }

      /*
       * XXX what about private snapshot ioctls ?
       * Do they need to be converted to V4L2 ?
      */

      default:
            return -ENOIOCTLCMD;
      }

      return 0;
}

static int meye_ioctl(struct inode *inode, struct file *file,
                 unsigned int cmd, unsigned long arg)
{
      return video_usercopy(inode, file, cmd, arg, meye_do_ioctl);
}

static unsigned int meye_poll(struct file *file, poll_table *wait)
{
      unsigned int res = 0;

      mutex_lock(&meye.lock);
      poll_wait(file, &meye.proc_list, wait);
      if (kfifo_len(meye.doneq))
            res = POLLIN | POLLRDNORM;
      mutex_unlock(&meye.lock);
      return res;
}

static void meye_vm_open(struct vm_area_struct *vma)
{
      long idx = (long)vma->vm_private_data;
      meye.vma_use_count[idx]++;
}

static void meye_vm_close(struct vm_area_struct *vma)
{
      long idx = (long)vma->vm_private_data;
      meye.vma_use_count[idx]--;
}

static struct vm_operations_struct meye_vm_ops = {
      .open       = meye_vm_open,
      .close            = meye_vm_close,
};

static int meye_mmap(struct file *file, struct vm_area_struct *vma)
{
      unsigned long start = vma->vm_start;
      unsigned long size = vma->vm_end - vma->vm_start;
      unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
      unsigned long page, pos;

      mutex_lock(&meye.lock);
      if (size > gbuffers * gbufsize) {
            mutex_unlock(&meye.lock);
            return -EINVAL;
      }
      if (!meye.grab_fbuffer) {
            int i;

            /* lazy allocation */
            meye.grab_fbuffer = rvmalloc(gbuffers*gbufsize);
            if (!meye.grab_fbuffer) {
                  printk(KERN_ERR "meye: v4l framebuffer allocation failed\n");
                  mutex_unlock(&meye.lock);
                  return -ENOMEM;
            }
            for (i = 0; i < gbuffers; i++)
                  meye.vma_use_count[i] = 0;
      }
      pos = (unsigned long)meye.grab_fbuffer + offset;

      while (size > 0) {
            page = vmalloc_to_pfn((void *)pos);
            if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
                  mutex_unlock(&meye.lock);
                  return -EAGAIN;
            }
            start += PAGE_SIZE;
            pos += PAGE_SIZE;
            if (size > PAGE_SIZE)
                  size -= PAGE_SIZE;
            else
                  size = 0;
      }

      vma->vm_ops = &meye_vm_ops;
      vma->vm_flags &= ~VM_IO;      /* not I/O memory */
      vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
      vma->vm_private_data = (void *) (offset / gbufsize);
      meye_vm_open(vma);

      mutex_unlock(&meye.lock);
      return 0;
}

static const struct file_operations meye_fops = {
      .owner            = THIS_MODULE,
      .open       = meye_open,
      .release    = meye_release,
      .mmap       = meye_mmap,
      .ioctl            = meye_ioctl,
      .compat_ioctl     = v4l_compat_ioctl32,
      .poll       = meye_poll,
      .llseek           = no_llseek,
};

static struct video_device meye_template = {
      .owner            = THIS_MODULE,
      .name       = "meye",
      .type       = VID_TYPE_CAPTURE,
      .fops       = &meye_fops,
      .release    = video_device_release,
      .minor            = -1,
};

#ifdef CONFIG_PM
static int meye_suspend(struct pci_dev *pdev, pm_message_t state)
{
      pci_save_state(pdev);
      meye.pm_mchip_mode = meye.mchip_mode;
      mchip_hic_stop();
      mchip_set(MCHIP_MM_INTA, 0x0);
      return 0;
}

static int meye_resume(struct pci_dev *pdev)
{
      pci_restore_state(pdev);
      pci_write_config_word(meye.mchip_dev, MCHIP_PCI_SOFTRESET_SET, 1);

      mchip_delay(MCHIP_HIC_CMD, 0);
      mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE);
      msleep(1);
      mchip_set(MCHIP_VRJ_SOFT_RESET, 1);
      msleep(1);
      mchip_set(MCHIP_MM_PCI_MODE, 5);
      msleep(1);
      mchip_set(MCHIP_MM_INTA, MCHIP_MM_INTA_HIC_1_MASK);

      switch (meye.pm_mchip_mode) {
      case MCHIP_HIC_MODE_CONT_OUT:
            mchip_continuous_start();
            break;
      case MCHIP_HIC_MODE_CONT_COMP:
            mchip_cont_compression_start();
            break;
      }
      return 0;
}
#endif

static int __devinit meye_probe(struct pci_dev *pcidev,
                        const struct pci_device_id *ent)
{
      int ret = -EBUSY;
      unsigned long mchip_adr;

      if (meye.mchip_dev != NULL) {
            printk(KERN_ERR "meye: only one device allowed!\n");
            goto outnotdev;
      }

      meye.mchip_dev = pcidev;
      meye.video_dev = video_device_alloc();
      if (!meye.video_dev) {
            printk(KERN_ERR "meye: video_device_alloc() failed!\n");
            goto outnotdev;
      }

      ret = -ENOMEM;
      meye.grab_temp = vmalloc(MCHIP_NB_PAGES_MJPEG * PAGE_SIZE);
      if (!meye.grab_temp) {
            printk(KERN_ERR "meye: grab buffer allocation failed\n");
            goto outvmalloc;
      }

      spin_lock_init(&meye.grabq_lock);
      meye.grabq = kfifo_alloc(sizeof(int) * MEYE_MAX_BUFNBRS, GFP_KERNEL,
                         &meye.grabq_lock);
      if (IS_ERR(meye.grabq)) {
            printk(KERN_ERR "meye: fifo allocation failed\n");
            goto outkfifoalloc1;
      }
      spin_lock_init(&meye.doneq_lock);
      meye.doneq = kfifo_alloc(sizeof(int) * MEYE_MAX_BUFNBRS, GFP_KERNEL,
                         &meye.doneq_lock);
      if (IS_ERR(meye.doneq)) {
            printk(KERN_ERR "meye: fifo allocation failed\n");
            goto outkfifoalloc2;
      }

      memcpy(meye.video_dev, &meye_template, sizeof(meye_template));
      meye.video_dev->dev = &meye.mchip_dev->dev;

      if ((ret = sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERA, 1))) {
            printk(KERN_ERR "meye: unable to power on the camera\n");
            printk(KERN_ERR "meye: did you enable the camera in "
                        "sonypi using the module options ?\n");
            goto outsonypienable;
      }

      ret = -EIO;
      if ((ret = pci_enable_device(meye.mchip_dev))) {
            printk(KERN_ERR "meye: pci_enable_device failed\n");
            goto outenabledev;
      }

      mchip_adr = pci_resource_start(meye.mchip_dev,0);
      if (!mchip_adr) {
            printk(KERN_ERR "meye: mchip has no device base address\n");
            goto outregions;
      }
      if (!request_mem_region(pci_resource_start(meye.mchip_dev, 0),
                        pci_resource_len(meye.mchip_dev, 0),
                        "meye")) {
            printk(KERN_ERR "meye: request_mem_region failed\n");
            goto outregions;
      }
      meye.mchip_mmregs = ioremap(mchip_adr, MCHIP_MM_REGS);
      if (!meye.mchip_mmregs) {
            printk(KERN_ERR "meye: ioremap failed\n");
            goto outremap;
      }

      meye.mchip_irq = pcidev->irq;
      if (request_irq(meye.mchip_irq, meye_irq,
                  IRQF_DISABLED | IRQF_SHARED, "meye", meye_irq)) {
            printk(KERN_ERR "meye: request_irq failed\n");
            goto outreqirq;
      }

      pci_write_config_byte(meye.mchip_dev, PCI_CACHE_LINE_SIZE, 8);
      pci_write_config_byte(meye.mchip_dev, PCI_LATENCY_TIMER, 64);

      pci_set_master(meye.mchip_dev);

      /* Ask the camera to perform a soft reset. */
      pci_write_config_word(meye.mchip_dev, MCHIP_PCI_SOFTRESET_SET, 1);

      mchip_delay(MCHIP_HIC_CMD, 0);
      mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE);

      msleep(1);
      mchip_set(MCHIP_VRJ_SOFT_RESET, 1);

      msleep(1);
      mchip_set(MCHIP_MM_PCI_MODE, 5);

      msleep(1);
      mchip_set(MCHIP_MM_INTA, MCHIP_MM_INTA_HIC_1_MASK);

      if (video_register_device(meye.video_dev, VFL_TYPE_GRABBER,
                          video_nr) < 0) {
            printk(KERN_ERR "meye: video_register_device failed\n");
            goto outvideoreg;
      }

      mutex_init(&meye.lock);
      init_waitqueue_head(&meye.proc_list);
      meye.picture.depth = 16;
      meye.picture.palette = VIDEO_PALETTE_YUV422;
      meye.picture.brightness = 32 << 10;
      meye.picture.hue = 32 << 10;
      meye.picture.colour = 32 << 10;
      meye.picture.contrast = 32 << 10;
      meye.picture.whiteness = 0;
      meye.params.subsample = 0;
      meye.params.quality = 8;
      meye.params.sharpness = 32;
      meye.params.agc = 48;
      meye.params.picture = 0;
      meye.params.framerate = 0;

      sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERABRIGHTNESS, 32);
      sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAHUE, 32);
      sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERACOLOR, 32);
      sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERACONTRAST, 32);
      sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERASHARPNESS, 32);
      sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAPICTURE, 0);
      sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAAGC, 48);

      printk(KERN_INFO "meye: Motion Eye Camera Driver v%s.\n",
             MEYE_DRIVER_VERSION);
      printk(KERN_INFO "meye: mchip KL5A72002 rev. %d, base %lx, irq %d\n",
             meye.mchip_dev->revision, mchip_adr, meye.mchip_irq);

      return 0;

outvideoreg:
      free_irq(meye.mchip_irq, meye_irq);
outreqirq:
      iounmap(meye.mchip_mmregs);
outremap:
      release_mem_region(pci_resource_start(meye.mchip_dev, 0),
                     pci_resource_len(meye.mchip_dev, 0));
outregions:
      pci_disable_device(meye.mchip_dev);
outenabledev:
      sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERA, 0);
outsonypienable:
      kfifo_free(meye.doneq);
outkfifoalloc2:
      kfifo_free(meye.grabq);
outkfifoalloc1:
      vfree(meye.grab_temp);
outvmalloc:
      video_device_release(meye.video_dev);
outnotdev:
      return ret;
}

static void __devexit meye_remove(struct pci_dev *pcidev)
{
      video_unregister_device(meye.video_dev);

      mchip_hic_stop();

      mchip_dma_free();

      /* disable interrupts */
      mchip_set(MCHIP_MM_INTA, 0x0);

      free_irq(meye.mchip_irq, meye_irq);

      iounmap(meye.mchip_mmregs);

      release_mem_region(pci_resource_start(meye.mchip_dev, 0),
                     pci_resource_len(meye.mchip_dev, 0));

      pci_disable_device(meye.mchip_dev);

      sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERA, 0);

      kfifo_free(meye.doneq);
      kfifo_free(meye.grabq);

      vfree(meye.grab_temp);

      if (meye.grab_fbuffer) {
            rvfree(meye.grab_fbuffer, gbuffers*gbufsize);
            meye.grab_fbuffer = NULL;
      }

      printk(KERN_INFO "meye: removed\n");
}

static struct pci_device_id meye_pci_tbl[] = {
      { PCI_VENDOR_ID_KAWASAKI, PCI_DEVICE_ID_MCHIP_KL5A72002,
        PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
      { }
};

MODULE_DEVICE_TABLE(pci, meye_pci_tbl);

static struct pci_driver meye_driver = {
      .name       = "meye",
      .id_table   = meye_pci_tbl,
      .probe            = meye_probe,
      .remove           = __devexit_p(meye_remove),
#ifdef CONFIG_PM
      .suspend    = meye_suspend,
      .resume           = meye_resume,
#endif
};

static int __init meye_init(void)
{
      gbuffers = max(2, min((int)gbuffers, MEYE_MAX_BUFNBRS));
      if (gbufsize < 0 || gbufsize > MEYE_MAX_BUFSIZE)
            gbufsize = MEYE_MAX_BUFSIZE;
      gbufsize = PAGE_ALIGN(gbufsize);
      printk(KERN_INFO "meye: using %d buffers with %dk (%dk total)"
                   "for capture\n",
                   gbuffers,
                   gbufsize / 1024, gbuffers * gbufsize / 1024);
      return pci_register_driver(&meye_driver);
}

static void __exit meye_exit(void)
{
      pci_unregister_driver(&meye_driver);
}

module_init(meye_init);
module_exit(meye_exit);

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