/*
* saa7111 - Philips SAA7111A video decoder driver version 0.0.3
*
* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
*
* Slight changes for video timing and attachment output by
* Wolfgang Scherr <scherr@net4you.net>
*
* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
* - moved over to linux>=2.4.x i2c protocol (1/1/2003)
*
* Changes by Michael Hunold <michael@mihu.de>
* - implemented DECODER_SET_GPIO, DECODER_INIT, DECODER_SET_VBI_BYPASS
*
* 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/init.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/signal.h>
#include <linux/types.h>
#include <linux/i2c.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/uaccess.h>
#include <linux/videodev.h>
#include <linux/video_decoder.h>
MODULE_DESCRIPTION("Philips SAA7111 video decoder driver");
MODULE_AUTHOR("Dave Perks");
MODULE_LICENSE("GPL");
#define I2C_NAME(s) (s)->name
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
#define dprintk(num, format, args...) \
do { \
if (debug >= num) \
printk(format, ##args); \
} while (0)
/* ----------------------------------------------------------------------- */
#define SAA7111_NR_REG 0x18
struct saa7111 {
unsigned char reg[SAA7111_NR_REG];
int norm;
int input;
int enable;
};
#define I2C_SAA7111 0x48
/* ----------------------------------------------------------------------- */
static inline int
saa7111_write (struct i2c_client *client,
u8 reg,
u8 value)
{
struct saa7111 *decoder = i2c_get_clientdata(client);
decoder->reg[reg] = value;
return i2c_smbus_write_byte_data(client, reg, value);
}
static inline void
saa7111_write_if_changed(struct i2c_client *client, u8 reg, u8 value)
{
struct saa7111 *decoder = i2c_get_clientdata(client);
if (decoder->reg[reg] != value) {
decoder->reg[reg] = value;
i2c_smbus_write_byte_data(client, reg, value);
}
}
static int
saa7111_write_block (struct i2c_client *client,
const u8 *data,
unsigned int len)
{
int ret = -1;
u8 reg;
/* the saa7111 has an autoincrement function, use it if
* the adapter understands raw I2C */
if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
/* do raw I2C, not smbus compatible */
struct saa7111 *decoder = i2c_get_clientdata(client);
u8 block_data[32];
int block_len;
while (len >= 2) {
block_len = 0;
block_data[block_len++] = reg = data[0];
do {
block_data[block_len++] =
decoder->reg[reg++] = data[1];
len -= 2;
data += 2;
} while (len >= 2 && data[0] == reg &&
block_len < 32);
if ((ret = i2c_master_send(client, block_data,
block_len)) < 0)
break;
}
} else {
/* do some slow I2C emulation kind of thing */
while (len >= 2) {
reg = *data++;
if ((ret = saa7111_write(client, reg,
*data++)) < 0)
break;
len -= 2;
}
}
return ret;
}
static int
saa7111_init_decoder (struct i2c_client *client,
struct video_decoder_init *init)
{
return saa7111_write_block(client, init->data, init->len);
}
static inline int
saa7111_read (struct i2c_client *client,
u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
/* ----------------------------------------------------------------------- */
static const unsigned char saa7111_i2c_init[] = {
0x00, 0x00, /* 00 - ID byte */
0x01, 0x00, /* 01 - reserved */
/*front end */
0x02, 0xd0, /* 02 - FUSE=3, GUDL=2, MODE=0 */
0x03, 0x23, /* 03 - HLNRS=0, VBSL=1, WPOFF=0,
* HOLDG=0, GAFIX=0, GAI1=256, GAI2=256 */
0x04, 0x00, /* 04 - GAI1=256 */
0x05, 0x00, /* 05 - GAI2=256 */
/* decoder */
0x06, 0xf3, /* 06 - HSB at 13(50Hz) / 17(60Hz)
* pixels after end of last line */
/*0x07, 0x13, * 07 - HSS at 113(50Hz) / 117(60Hz) pixels
* after end of last line */
0x07, 0xe8, /* 07 - HSS seems to be needed to
* work with NTSC, too */
0x08, 0xc8, /* 08 - AUFD=1, FSEL=1, EXFIL=0,
* VTRC=1, HPLL=0, VNOI=0 */
0x09, 0x01, /* 09 - BYPS=0, PREF=0, BPSS=0,
* VBLB=0, UPTCV=0, APER=1 */
0x0a, 0x80, /* 0a - BRIG=128 */
0x0b, 0x47, /* 0b - CONT=1.109 */
0x0c, 0x40, /* 0c - SATN=1.0 */
0x0d, 0x00, /* 0d - HUE=0 */
0x0e, 0x01, /* 0e - CDTO=0, CSTD=0, DCCF=0,
* FCTC=0, CHBW=1 */
0x0f, 0x00, /* 0f - reserved */
0x10, 0x48, /* 10 - OFTS=1, HDEL=0, VRLN=1, YDEL=0 */
0x11, 0x1c, /* 11 - GPSW=0, CM99=0, FECO=0, COMPO=1,
* OEYC=1, OEHV=1, VIPB=0, COLO=0 */
0x12, 0x00, /* 12 - output control 2 */
0x13, 0x00, /* 13 - output control 3 */
0x14, 0x00, /* 14 - reserved */
0x15, 0x00, /* 15 - VBI */
0x16, 0x00, /* 16 - VBI */
0x17, 0x00, /* 17 - VBI */
};
static int
saa7111_command (struct i2c_client *client,
unsigned int cmd,
void *arg)
{
struct saa7111 *decoder = i2c_get_clientdata(client);
switch (cmd) {
case 0:
break;
case DECODER_INIT:
{
struct video_decoder_init *init = arg;
if (NULL != init)
return saa7111_init_decoder(client, init);
else {
struct video_decoder_init vdi;
vdi.data = saa7111_i2c_init;
vdi.len = sizeof(saa7111_i2c_init);
return saa7111_init_decoder(client, &vdi);
}
}
case DECODER_DUMP:
{
int i;
for (i = 0; i < SAA7111_NR_REG; i += 16) {
int j;
printk(KERN_DEBUG "%s: %03x", I2C_NAME(client), i);
for (j = 0; j < 16 && i + j < SAA7111_NR_REG; ++j) {
printk(" %02x",
saa7111_read(client, i + j));
}
printk("\n");
}
}
break;
case DECODER_GET_CAPABILITIES:
{
struct video_decoder_capability *cap = arg;
cap->flags = VIDEO_DECODER_PAL |
VIDEO_DECODER_NTSC |
VIDEO_DECODER_SECAM |
VIDEO_DECODER_AUTO |
VIDEO_DECODER_CCIR;
cap->inputs = 8;
cap->outputs = 1;
}
break;
case DECODER_GET_STATUS:
{
int *iarg = arg;
int status;
int res;
status = saa7111_read(client, 0x1f);
dprintk(1, KERN_DEBUG "%s status: 0x%02x\n", I2C_NAME(client),
status);
res = 0;
if ((status & (1 << 6)) == 0) {
res |= DECODER_STATUS_GOOD;
}
switch (decoder->norm) {
case VIDEO_MODE_NTSC:
res |= DECODER_STATUS_NTSC;
break;
case VIDEO_MODE_PAL:
res |= DECODER_STATUS_PAL;
break;
case VIDEO_MODE_SECAM:
res |= DECODER_STATUS_SECAM;
break;
default:
case VIDEO_MODE_AUTO:
if ((status & (1 << 5)) != 0) {
res |= DECODER_STATUS_NTSC;
} else {
res |= DECODER_STATUS_PAL;
}
break;
}
if ((status & (1 << 0)) != 0) {
res |= DECODER_STATUS_COLOR;
}
*iarg = res;
}
break;
case DECODER_SET_GPIO:
{
int *iarg = arg;
if (0 != *iarg) {
saa7111_write(client, 0x11,
(decoder->reg[0x11] | 0x80));
} else {
saa7111_write(client, 0x11,
(decoder->reg[0x11] & 0x7f));
}
break;
}
case DECODER_SET_VBI_BYPASS:
{
int *iarg = arg;
if (0 != *iarg) {
saa7111_write(client, 0x13,
(decoder->reg[0x13] & 0xf0) | 0x0a);
} else {
saa7111_write(client, 0x13,
(decoder->reg[0x13] & 0xf0));
}
break;
}
case DECODER_SET_NORM:
{
int *iarg = arg;
switch (*iarg) {
case VIDEO_MODE_NTSC:
saa7111_write(client, 0x08,
(decoder->reg[0x08] & 0x3f) | 0x40);
saa7111_write(client, 0x0e,
(decoder->reg[0x0e] & 0x8f));
break;
case VIDEO_MODE_PAL:
saa7111_write(client, 0x08,
(decoder->reg[0x08] & 0x3f) | 0x00);
saa7111_write(client, 0x0e,
(decoder->reg[0x0e] & 0x8f));
break;
case VIDEO_MODE_SECAM:
saa7111_write(client, 0x08,
(decoder->reg[0x08] & 0x3f) | 0x00);
saa7111_write(client, 0x0e,
(decoder->reg[0x0e] & 0x8f) | 0x50);
break;
case VIDEO_MODE_AUTO:
saa7111_write(client, 0x08,
(decoder->reg[0x08] & 0x3f) | 0x80);
saa7111_write(client, 0x0e,
(decoder->reg[0x0e] & 0x8f));
break;
default:
return -EINVAL;
}
decoder->norm = *iarg;
}
break;
case DECODER_SET_INPUT:
{
int *iarg = arg;
if (*iarg < 0 || *iarg > 7) {
return -EINVAL;
}
if (decoder->input != *iarg) {
decoder->input = *iarg;
/* select mode */
saa7111_write(client, 0x02,
(decoder->
reg[0x02] & 0xf8) | decoder->input);
/* bypass chrominance trap for modes 4..7 */
saa7111_write(client, 0x09,
(decoder->
reg[0x09] & 0x7f) | ((decoder->
input >
3) ? 0x80 :
0));
}
}
break;
case DECODER_SET_OUTPUT:
{
int *iarg = arg;
/* not much choice of outputs */
if (*iarg != 0) {
return -EINVAL;
}
}
break;
case DECODER_ENABLE_OUTPUT:
{
int *iarg = arg;
int enable = (*iarg != 0);
if (decoder->enable != enable) {
decoder->enable = enable;
/* RJ: If output should be disabled (for
* playing videos), we also need a open PLL.
* The input is set to 0 (where no input
* source is connected), although this
* is not necessary.
*
* If output should be enabled, we have to
* reverse the above.
*/
if (decoder->enable) {
saa7111_write(client, 0x02,
(decoder->
reg[0x02] & 0xf8) |
decoder->input);
saa7111_write(client, 0x08,
(decoder->reg[0x08] & 0xfb));
saa7111_write(client, 0x11,
(decoder->
reg[0x11] & 0xf3) | 0x0c);
} else {
saa7111_write(client, 0x02,
(decoder->reg[0x02] & 0xf8));
saa7111_write(client, 0x08,
(decoder->
reg[0x08] & 0xfb) | 0x04);
saa7111_write(client, 0x11,
(decoder->reg[0x11] & 0xf3));
}
}
}
break;
case DECODER_SET_PICTURE:
{
struct video_picture *pic = arg;
/* We want 0 to 255 we get 0-65535 */
saa7111_write_if_changed(client, 0x0a, pic->brightness >> 8);
/* We want 0 to 127 we get 0-65535 */
saa7111_write(client, 0x0b, pic->contrast >> 9);
/* We want 0 to 127 we get 0-65535 */
saa7111_write(client, 0x0c, pic->colour >> 9);
/* We want -128 to 127 we get 0-65535 */
saa7111_write(client, 0x0d, (pic->hue - 32768) >> 8);
}
break;
default:
return -EINVAL;
}
return 0;
}
/* ----------------------------------------------------------------------- */
/*
* Generic i2c probe
* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
*/
static unsigned short normal_i2c[] = { I2C_SAA7111 >> 1, I2C_CLIENT_END };
static unsigned short ignore = I2C_CLIENT_END;
static struct i2c_client_address_data addr_data = {
.normal_i2c = normal_i2c,
.probe = &ignore,
.ignore = &ignore,
};
static struct i2c_driver i2c_driver_saa7111;
static int
saa7111_detect_client (struct i2c_adapter *adapter,
int address,
int kind)
{
int i;
struct i2c_client *client;
struct saa7111 *decoder;
struct video_decoder_init vdi;
dprintk(1,
KERN_INFO
"saa7111.c: detecting saa7111 client on address 0x%x\n",
address << 1);
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return 0;
client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (!client)
return -ENOMEM;
client->addr = address;
client->adapter = adapter;
client->driver = &i2c_driver_saa7111;
strlcpy(I2C_NAME(client), "saa7111", sizeof(I2C_NAME(client)));
decoder = kzalloc(sizeof(struct saa7111), GFP_KERNEL);
if (decoder == NULL) {
kfree(client);
return -ENOMEM;
}
decoder->norm = VIDEO_MODE_NTSC;
decoder->input = 0;
decoder->enable = 1;
i2c_set_clientdata(client, decoder);
i = i2c_attach_client(client);
if (i) {
kfree(client);
kfree(decoder);
return i;
}
vdi.data = saa7111_i2c_init;
vdi.len = sizeof(saa7111_i2c_init);
i = saa7111_init_decoder(client, &vdi);
if (i < 0) {
dprintk(1, KERN_ERR "%s_attach error: init status %d\n",
I2C_NAME(client), i);
} else {
dprintk(1,
KERN_INFO
"%s_attach: chip version %x at address 0x%x\n",
I2C_NAME(client), saa7111_read(client, 0x00) >> 4,
client->addr << 1);
}
return 0;
}
static int
saa7111_attach_adapter (struct i2c_adapter *adapter)
{
dprintk(1,
KERN_INFO
"saa7111.c: starting probe for adapter %s (0x%x)\n",
I2C_NAME(adapter), adapter->id);
return i2c_probe(adapter, &addr_data, &saa7111_detect_client);
}
static int
saa7111_detach_client (struct i2c_client *client)
{
struct saa7111 *decoder = i2c_get_clientdata(client);
int err;
err = i2c_detach_client(client);
if (err) {
return err;
}
kfree(decoder);
kfree(client);
return 0;
}
/* ----------------------------------------------------------------------- */
static struct i2c_driver i2c_driver_saa7111 = {
.driver = {
.name = "saa7111",
},
.id = I2C_DRIVERID_SAA7111A,
.attach_adapter = saa7111_attach_adapter,
.detach_client = saa7111_detach_client,
.command = saa7111_command,
};
static int __init
saa7111_init (void)
{
return i2c_add_driver(&i2c_driver_saa7111);
}
static void __exit
saa7111_exit (void)
{
i2c_del_driver(&i2c_driver_saa7111);
}
module_init(saa7111_init);
module_exit(saa7111_exit);
