meye.c

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/*
 * Motion Eye video4linux driver for Sony Vaio PictureBook
 *
 * Copyright (C) 2001-2004 Stelian Pop <[email protected]>
 *
 * Copyright (C) 2001-2002 Alcôve <www.alcove.com>
 *
 * Copyright (C) 2000 Andrew Tridgell <[email protected]>
 *
 * 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/sched.h>
#include <linux/init.h>
#include <linux/gfp.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.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 <[email protected]>");
MODULE_DESCRIPTION("v4l2 driver for the MotionEye camera");
MODULE_LICENSE("GPL");
MODULE_VERSION(MEYE_DRIVER_VERSION);

/* 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_BIT_MASK(32)))
        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;

    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_out_locked(&meye.grabq, (unsigned char *)&reqnr,
                  sizeof(int), &meye.grabq_lock) != 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_in_locked(&meye.doneq, (unsigned char *)&reqnr,
                sizeof(int), &meye.doneq_lock);
        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_out_locked(&meye.grabq, (unsigned char *)&reqnr,
                  sizeof(int), &meye.grabq_lock) != 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_in_locked(&meye.doneq, (unsigned char *)&reqnr,
                sizeof(int), &meye.doneq_lock);
        wake_up_interruptible(&meye.proc_list);
    }
    mchip_free_frame();
    goto again;
}

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

static int meye_open(struct file *file)
{
    int i;

    if (test_and_set_bit(0, &meye.in_use))
        return -EBUSY;

    mchip_hic_stop();

    if (mchip_dma_alloc()) {
        printk(KERN_ERR "meye: mchip framebuffer allocation failed\n");
        clear_bit(0, &meye.in_use);
        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 file *file)
{
    mchip_hic_stop();
    mchip_dma_free();
    clear_bit(0, &meye.in_use);
    return 0;
}

static int meyeioc_g_params(struct meye_params *p)
{
    *p = meye.params;
    return 0;
}

static int meyeioc_s_params(struct meye_params *jp)
{
    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);

    return 0;
}

static int meyeioc_qbuf_capt(int *nb)
{
    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_in_locked(&meye.grabq, (unsigned char *)nb, sizeof(int),
             &meye.grabq_lock);
    mutex_unlock(&meye.lock);

    return 0;
}

static int meyeioc_sync(struct file *file, void *fh, int *i)
{
    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;
        if (kfifo_out_locked(&meye.doneq, (unsigned char *)&unused,
                sizeof(int), &meye.doneq_lock) != sizeof(int))
                    break;
    }
    *i = meye.grab_buffer[*i].size;
    mutex_unlock(&meye.lock);
    return 0;
}

static int meyeioc_stillcapt(void)
{
    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);

    return 0;
}

static int meyeioc_stilljcapt(int *len)
{
    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);
    return 0;
}

static int vidioc_querycap(struct file *file, void *fh,
                struct v4l2_capability *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;

    return 0;
}

static int vidioc_enum_input(struct file *file, void *fh, struct v4l2_input *i)
{
    if (i->index != 0)
        return -EINVAL;

    strcpy(i->name, "Camera");
    i->type = V4L2_INPUT_TYPE_CAMERA;

    return 0;
}

static int vidioc_g_input(struct file *file, void *fh, unsigned int *i)
{
    *i = 0;
    return 0;
}

static int vidioc_s_input(struct file *file, void *fh, unsigned int i)
{
    if (i != 0)
        return -EINVAL;

    return 0;
}

static int vidioc_queryctrl(struct file *file, void *fh,
                struct v4l2_queryctrl *c)
{
    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_MEYE_SHARPNESS:
    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;

        /* Continue to report legacy private SHARPNESS ctrl but
         * say it is disabled in preference to ctrl in the spec
         */
        c->flags = (c->id == V4L2_CID_SHARPNESS) ? 0 :
                        V4L2_CTRL_FLAG_DISABLED;
        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;
    }

    return 0;
}

static int vidioc_s_ctrl(struct file *file, void *fh, struct v4l2_control *c)
{
    mutex_lock(&meye.lock);
    switch (c->id) {
    case V4L2_CID_BRIGHTNESS:
        sony_pic_camera_command(
            SONY_PIC_COMMAND_SETCAMERABRIGHTNESS, c->value);
        meye.brightness = c->value << 10;
        break;
    case V4L2_CID_HUE:
        sony_pic_camera_command(
            SONY_PIC_COMMAND_SETCAMERAHUE, c->value);
        meye.hue = c->value << 10;
        break;
    case V4L2_CID_CONTRAST:
        sony_pic_camera_command(
            SONY_PIC_COMMAND_SETCAMERACONTRAST, c->value);
        meye.contrast = c->value << 10;
        break;
    case V4L2_CID_SATURATION:
        sony_pic_camera_command(
            SONY_PIC_COMMAND_SETCAMERACOLOR, c->value);
        meye.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:
    case V4L2_CID_MEYE_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);

    return 0;
}

static int vidioc_g_ctrl(struct file *file, void *fh, struct v4l2_control *c)
{
    mutex_lock(&meye.lock);
    switch (c->id) {
    case V4L2_CID_BRIGHTNESS:
        c->value = meye.brightness >> 10;
        break;
    case V4L2_CID_HUE:
        c->value = meye.hue >> 10;
        break;
    case V4L2_CID_CONTRAST:
        c->value = meye.contrast >> 10;
        break;
    case V4L2_CID_SATURATION:
        c->value = meye.colour >> 10;
        break;
    case V4L2_CID_AGC:
        c->value = meye.params.agc;
        break;
    case V4L2_CID_SHARPNESS:
    case V4L2_CID_MEYE_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);

    return 0;
}

static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh,
                struct v4l2_fmtdesc *f)
{
    if (f->index > 1)
        return -EINVAL;

    if (f->index == 0) {
        /* standard YUV 422 capture */
        f->flags = 0;
        strcpy(f->description, "YUV422");
        f->pixelformat = V4L2_PIX_FMT_YUYV;
    } else {
        /* compressed MJPEG capture */
        f->flags = V4L2_FMT_FLAG_COMPRESSED;
        strcpy(f->description, "MJPEG");
        f->pixelformat = V4L2_PIX_FMT_MJPEG;
    }

    return 0;
}

static int vidioc_try_fmt_vid_cap(struct file *file, void *fh,
                struct v4l2_format *f)
{
    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;

    return 0;
}

static int vidioc_g_fmt_vid_cap(struct file *file, void *fh,
                    struct v4l2_format *f)
{
    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;

    return 0;
}

static int vidioc_s_fmt_vid_cap(struct file *file, void *fh,
                    struct v4l2_format *f)
{
    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;

    return 0;
}

static int vidioc_reqbufs(struct file *file, void *fh,
                struct v4l2_requestbuffers *req)
{
    int i;

    if (req->memory != V4L2_MEMORY_MMAP)
        return -EINVAL;

    if (meye.grab_fbuffer && req->count == gbuffers) {
        /* already allocated, no modifications */
        return 0;
    }

    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);

    return 0;
}

static int vidioc_querybuf(struct file *file, void *fh, struct v4l2_buffer *buf)
{
    unsigned int index = buf->index;

    if (index >= gbuffers)
        return -EINVAL;

    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;

    return 0;
}

static int vidioc_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
{
    if (buf->memory != V4L2_MEMORY_MMAP)
        return -EINVAL;

    if (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_in_locked(&meye.grabq, (unsigned char *)&buf->index,
            sizeof(int), &meye.grabq_lock);
    mutex_unlock(&meye.lock);

    return 0;
}

static int vidioc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
{
    int reqnr;

    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_out_locked(&meye.doneq, (unsigned char *)&reqnr,
               sizeof(int), &meye.doneq_lock)) {
        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);

    return 0;
}

static int vidioc_streamon(struct file *file, void *fh, enum v4l2_buf_type i)
{
    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);

    return 0;
}

static int vidioc_streamoff(struct file *file, void *fh, enum v4l2_buf_type 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);
    return 0;
}

static long vidioc_default(struct file *file, void *fh, bool valid_prio,
                        int cmd, void *arg)
{
    switch (cmd) {
    case MEYEIOC_G_PARAMS:
        return meyeioc_g_params((struct meye_params *) arg);

    case MEYEIOC_S_PARAMS:
        return meyeioc_s_params((struct meye_params *) arg);

    case MEYEIOC_QBUF_CAPT:
        return meyeioc_qbuf_capt((int *) arg);

    case MEYEIOC_SYNC:
        return meyeioc_sync(file, fh, (int *) arg);

    case MEYEIOC_STILLCAPT:
        return meyeioc_stillcapt();

    case MEYEIOC_STILLJCAPT:
        return meyeioc_stilljcapt((int *) arg);

    default:
        return -ENOTTY;
    }

}

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 const 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_DONTEXPAND | VM_DONTDUMP;
    vma->vm_private_data = (void *) (offset / gbufsize);
    meye_vm_open(vma);

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

static const struct v4l2_file_operations meye_fops = {
    .owner      = THIS_MODULE,
    .open       = meye_open,
    .release    = meye_release,
    .mmap       = meye_mmap,
    .unlocked_ioctl = video_ioctl2,
    .poll       = meye_poll,
};

static const struct v4l2_ioctl_ops meye_ioctl_ops = {
    .vidioc_querycap    = vidioc_querycap,
    .vidioc_enum_input  = vidioc_enum_input,
    .vidioc_g_input     = vidioc_g_input,
    .vidioc_s_input     = vidioc_s_input,
    .vidioc_queryctrl   = vidioc_queryctrl,
    .vidioc_s_ctrl      = vidioc_s_ctrl,
    .vidioc_g_ctrl      = vidioc_g_ctrl,
    .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
    .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
    .vidioc_g_fmt_vid_cap   = vidioc_g_fmt_vid_cap,
    .vidioc_s_fmt_vid_cap   = vidioc_s_fmt_vid_cap,
    .vidioc_reqbufs     = vidioc_reqbufs,
    .vidioc_querybuf    = vidioc_querybuf,
    .vidioc_qbuf        = vidioc_qbuf,
    .vidioc_dqbuf       = vidioc_dqbuf,
    .vidioc_streamon    = vidioc_streamon,
    .vidioc_streamoff   = vidioc_streamoff,
    .vidioc_default     = vidioc_default,
};

static struct video_device meye_template = {
    .name       = "meye",
    .fops       = &meye_fops,
    .ioctl_ops  = &meye_ioctl_ops,
    .release    = video_device_release,
};

#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)
{
    struct v4l2_device *v4l2_dev = &meye.v4l2_dev;
    int ret = -EBUSY;
    unsigned long mchip_adr;

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

    ret = v4l2_device_register(&pcidev->dev, v4l2_dev);
    if (ret < 0) {
        v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
        return ret;
    }
    ret = -ENOMEM;
    meye.mchip_dev = pcidev;
    meye.vdev = video_device_alloc();
    if (!meye.vdev) {
        v4l2_err(v4l2_dev, "video_device_alloc() failed!\n");
        goto outnotdev;
    }

    meye.grab_temp = vmalloc(MCHIP_NB_PAGES_MJPEG * PAGE_SIZE);
    if (!meye.grab_temp) {
        v4l2_err(v4l2_dev, "grab buffer allocation failed\n");
        goto outvmalloc;
    }

    spin_lock_init(&meye.grabq_lock);
    if (kfifo_alloc(&meye.grabq, sizeof(int) * MEYE_MAX_BUFNBRS,
                GFP_KERNEL)) {
        v4l2_err(v4l2_dev, "fifo allocation failed\n");
        goto outkfifoalloc1;
    }
    spin_lock_init(&meye.doneq_lock);
    if (kfifo_alloc(&meye.doneq, sizeof(int) * MEYE_MAX_BUFNBRS,
                GFP_KERNEL)) {
        v4l2_err(v4l2_dev, "fifo allocation failed\n");
        goto outkfifoalloc2;
    }

    memcpy(meye.vdev, &meye_template, sizeof(meye_template));
    meye.vdev->v4l2_dev = &meye.v4l2_dev;

    ret = -EIO;
    if ((ret = sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERA, 1))) {
        v4l2_err(v4l2_dev, "meye: unable to power on the camera\n");
        v4l2_err(v4l2_dev, "meye: did you enable the camera in "
                "sonypi using the module options ?\n");
        goto outsonypienable;
    }

    if ((ret = pci_enable_device(meye.mchip_dev))) {
        v4l2_err(v4l2_dev, "meye: pci_enable_device failed\n");
        goto outenabledev;
    }

    mchip_adr = pci_resource_start(meye.mchip_dev,0);
    if (!mchip_adr) {
        v4l2_err(v4l2_dev, "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")) {
        v4l2_err(v4l2_dev, "meye: request_mem_region failed\n");
        goto outregions;
    }
    meye.mchip_mmregs = ioremap(mchip_adr, MCHIP_MM_REGS);
    if (!meye.mchip_mmregs) {
        v4l2_err(v4l2_dev, "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)) {
        v4l2_err(v4l2_dev, "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);

    mutex_init(&meye.lock);
    init_waitqueue_head(&meye.proc_list);
    meye.brightness = 32 << 10;
    meye.hue = 32 << 10;
    meye.colour = 32 << 10;
    meye.contrast = 32 << 10;
    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);

    if (video_register_device(meye.vdev, VFL_TYPE_GRABBER,
                  video_nr) < 0) {
        v4l2_err(v4l2_dev, "video_register_device failed\n");
        goto outvideoreg;
    }

    v4l2_info(v4l2_dev, "Motion Eye Camera Driver v%s.\n",
           MEYE_DRIVER_VERSION);
    v4l2_info(v4l2_dev, "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.vdev);
outnotdev:
    return ret;
}

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

    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_VDEVICE(KAWASAKI, PCI_DEVICE_ID_MCHIP_KL5A72002), 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);