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linux/drivers/media/pci/meye/meye.c
Laurent Pinchart d52e238136 [media] v4l: Support extending the v4l2_pix_format structure 
The v4l2_pix_format structure has no reserved field. It is embedded in
the v4l2_framebuffer structure which has no reserved fields either, and
in the v4l2_format structure which has reserved fields that were not
previously required to be zeroed out by applications.

To allow extending v4l2_pix_format, inline it in the v4l2_framebuffer
structure, and use the priv field as a magic value to indicate that the
application has set all v4l2_pix_format extended fields and zeroed all
reserved fields following the v4l2_pix_format field in the v4l2_format
structure.

The availability of this API extension is reported to userspace through
the new V4L2_CAP_EXT_PIX_FORMAT capability flag. Just checking that the
priv field is still set to the magic value at [GS]_FMT return wouldn't
be enough, as older kernels don't zero the priv field on return.

To simplify the internal API towards drivers zero the extended fields
and set the priv field to the magic value for applications not aware of
the extensions.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2014-07-17 12:44:47 -03:00

1861 lines
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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/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 <media/v4l2-fh.h>
#include <media/v4l2-event.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_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;
v4l2_get_timestamp(&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;
v4l2_get_timestamp(&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 v4l2_fh_open(file);
}
static int meye_release(struct file *file)
{
mchip_hic_stop();
mchip_dma_free();
clear_bit(0, &meye.in_use);
return v4l2_fh_release(file);
}
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->device_caps = V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_STREAMING;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
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 meye_s_ctrl(struct v4l2_ctrl *ctrl)
{
mutex_lock(&meye.lock);
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
sony_pic_camera_command(
SONY_PIC_COMMAND_SETCAMERABRIGHTNESS, ctrl->val);
meye.brightness = ctrl->val << 10;
break;
case V4L2_CID_HUE:
sony_pic_camera_command(
SONY_PIC_COMMAND_SETCAMERAHUE, ctrl->val);
meye.hue = ctrl->val << 10;
break;
case V4L2_CID_CONTRAST:
sony_pic_camera_command(
SONY_PIC_COMMAND_SETCAMERACONTRAST, ctrl->val);
meye.contrast = ctrl->val << 10;
break;
case V4L2_CID_SATURATION:
sony_pic_camera_command(
SONY_PIC_COMMAND_SETCAMERACOLOR, ctrl->val);
meye.colour = ctrl->val << 10;
break;
case V4L2_CID_MEYE_AGC:
sony_pic_camera_command(
SONY_PIC_COMMAND_SETCAMERAAGC, ctrl->val);
meye.params.agc = ctrl->val;
break;
case V4L2_CID_SHARPNESS:
sony_pic_camera_command(
SONY_PIC_COMMAND_SETCAMERASHARPNESS, ctrl->val);
meye.params.sharpness = ctrl->val;
break;
case V4L2_CID_MEYE_PICTURE:
sony_pic_camera_command(
SONY_PIC_COMMAND_SETCAMERAPICTURE, ctrl->val);
meye.params.picture = ctrl->val;
break;
case V4L2_CID_JPEG_COMPRESSION_QUALITY:
meye.params.quality = ctrl->val;
break;
case V4L2_CID_MEYE_FRAMERATE:
meye.params.framerate = ctrl->val;
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;
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;
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 | V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
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 | V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
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,
unsigned 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 = v4l2_ctrl_poll(file, wait);
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_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_log_status = v4l2_ctrl_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
.vidioc_default = vidioc_default,
};
static struct video_device meye_template = {
.name = "meye",
.fops = &meye_fops,
.ioctl_ops = &meye_ioctl_ops,
.release = video_device_release,
};
static const struct v4l2_ctrl_ops meye_ctrl_ops = {
.s_ctrl = meye_s_ctrl,
};
#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 meye_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
{
static const struct v4l2_ctrl_config ctrl_agc = {
.id = V4L2_CID_MEYE_AGC,
.type = V4L2_CTRL_TYPE_INTEGER,
.ops = &meye_ctrl_ops,
.name = "AGC",
.max = 63,
.step = 1,
.def = 48,
.flags = V4L2_CTRL_FLAG_SLIDER,
};
static const struct v4l2_ctrl_config ctrl_picture = {
.id = V4L2_CID_MEYE_PICTURE,
.type = V4L2_CTRL_TYPE_INTEGER,
.ops = &meye_ctrl_ops,
.name = "Picture",
.max = 63,
.step = 1,
};
static const struct v4l2_ctrl_config ctrl_framerate = {
.id = V4L2_CID_MEYE_FRAMERATE,
.type = V4L2_CTRL_TYPE_INTEGER,
.ops = &meye_ctrl_ops,
.name = "Framerate",
.max = 31,
.step = 1,
};
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_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);
v4l2_ctrl_handler_init(&meye.hdl, 3);
v4l2_ctrl_new_std(&meye.hdl, &meye_ctrl_ops,
V4L2_CID_BRIGHTNESS, 0, 63, 1, 32);
v4l2_ctrl_new_std(&meye.hdl, &meye_ctrl_ops,
V4L2_CID_HUE, 0, 63, 1, 32);
v4l2_ctrl_new_std(&meye.hdl, &meye_ctrl_ops,
V4L2_CID_CONTRAST, 0, 63, 1, 32);
v4l2_ctrl_new_std(&meye.hdl, &meye_ctrl_ops,
V4L2_CID_SATURATION, 0, 63, 1, 32);
v4l2_ctrl_new_custom(&meye.hdl, &ctrl_agc, NULL);
v4l2_ctrl_new_std(&meye.hdl, &meye_ctrl_ops,
V4L2_CID_SHARPNESS, 0, 63, 1, 32);
v4l2_ctrl_new_custom(&meye.hdl, &ctrl_picture, NULL);
v4l2_ctrl_new_std(&meye.hdl, &meye_ctrl_ops,
V4L2_CID_JPEG_COMPRESSION_QUALITY, 0, 10, 1, 8);
v4l2_ctrl_new_custom(&meye.hdl, &ctrl_framerate, NULL);
if (meye.hdl.error) {
v4l2_err(v4l2_dev, "couldn't register controls\n");
goto outvideoreg;
}
v4l2_ctrl_handler_setup(&meye.hdl);
meye.vdev->ctrl_handler = &meye.hdl;
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:
v4l2_ctrl_handler_free(&meye.hdl);
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 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 = 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 > 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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