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linux/drivers/media/video/meye.c
Hans Verkuil 0ea6bc8d43 V4L/DVB (8523): v4l2-dev: remove unused type and type2 field from video_device 
The type and type2 fields were unused and so could be removed.
Instead add a vfl_type field that contains the type of the video
device.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-27 11:07:10 -03:00

2000 lines
52 KiB
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/*
* Motion Eye video4linux driver for Sony Vaio PictureBook
*
* Copyright (C) 2001-2004 Stelian Pop <stelian@popies.net>
*
* Copyright (C) 2001-2002 Alcôve <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 <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 <stelian@popies.net>");
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_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;
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 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_put(meye.grabq, (unsigned char *)nb, sizeof(int));
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;
kfifo_get(meye.doneq, (unsigned char *)&unused, sizeof(int));
}
*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)
{
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;
return 0;
}
static int vidioc_enum_input(struct file *file, void *fh, struct v4l2_input *i)
{
if (i->index != 0)
return -EINVAL;
memset(i, 0, sizeof(*i));
i->index = 0;
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.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:
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.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:
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->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;
}
return 0;
}
static int vidioc_try_fmt_vid_cap(struct file *file, void *fh,
struct v4l2_format *f)
{
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;
return 0;
}
static int vidioc_g_fmt_vid_cap(struct file *file, void *fh,
struct v4l2_format *f)
{
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;
return 0;
}
static int vidioc_s_fmt_vid_cap(struct file *file, void *fh,
struct v4l2_format *f)
{
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;
return 0;
}
static int vidioc_reqbufs(struct file *file, void *fh,
struct v4l2_requestbuffers *req)
{
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 */
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)
{
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;
return 0;
}
static int vidioc_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
{
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);
return 0;
}
static int vidioc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
{
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);
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 int vidioc_default(struct file *file, void *fh, 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 -EINVAL;
}
}
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 = video_ioctl2,
#ifdef CONFIG_COMPAT
.compat_ioctl = v4l_compat_ioctl32,
#endif
.poll = meye_poll,
.llseek = no_llseek,
};
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,
.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->parent = &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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