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linux/drivers/media/video/saa7185.c
Jean Delvare 9fc6adfa9a [PATCH] hwmon: hwmon vs i2c, second round (01/11) 
Add support for kind-forced addresses to i2c_probe, like i2c_detect
has for (essentially) hardware monitoring drivers.

Note that this change will slightly increase the size of the drivers
using I2C_CLIENT_INSMOD, with no immediate benefit. This is a
requirement if we want to merge i2c_probe and i2c_detect though, and
seems a reasonable price to pay in comparison with the previous
cleanups which saved much more than that (such as the i2c-isa cleanup
or the i2c address ranges removal.)

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-05 09:14:18 -07:00

516 lines
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/*
* saa7185 - Philips SAA7185B video encoder 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)
*
* 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/pci.h>
#include <linux/signal.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <linux/sched.h>
#include <asm/segment.h>
#include <linux/types.h>
#include <linux/videodev.h>
#include <asm/uaccess.h>
MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
MODULE_AUTHOR("Dave Perks");
MODULE_LICENSE("GPL");
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
#define I2C_NAME(s) (s)->name
#include <linux/video_encoder.h>
static int debug = 0;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
#define dprintk(num, format, args...) \
do { \
if (debug >= num) \
printk(format, ##args); \
} while (0)
/* ----------------------------------------------------------------------- */
struct saa7185 {
unsigned char reg[128];
int norm;
int enable;
int bright;
int contrast;
int hue;
int sat;
};
#define I2C_SAA7185 0x88
/* ----------------------------------------------------------------------- */
static inline int
saa7185_read (struct i2c_client *client)
{
return i2c_smbus_read_byte(client);
}
static int
saa7185_write (struct i2c_client *client,
u8 reg,
u8 value)
{
struct saa7185 *encoder = i2c_get_clientdata(client);
dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
encoder->reg[reg] = value;
return i2c_smbus_write_byte_data(client, reg, value);
}
static int
saa7185_write_block (struct i2c_client *client,
const u8 *data,
unsigned int len)
{
int ret = -1;
u8 reg;
/* the adv7175 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 saa7185 *encoder = i2c_get_clientdata(client);
struct i2c_msg msg;
u8 block_data[32];
msg.addr = client->addr;
msg.flags = 0;
while (len >= 2) {
msg.buf = (char *) block_data;
msg.len = 0;
block_data[msg.len++] = reg = data[0];
do {
block_data[msg.len++] =
encoder->reg[reg++] = data[1];
len -= 2;
data += 2;
} while (len >= 2 && data[0] == reg &&
msg.len < 32);
if ((ret = i2c_transfer(client->adapter,
&msg, 1)) < 0)
break;
}
} else {
/* do some slow I2C emulation kind of thing */
while (len >= 2) {
reg = *data++;
if ((ret = saa7185_write(client, reg,
*data++)) < 0)
break;
len -= 2;
}
}
return ret;
}
/* ----------------------------------------------------------------------- */
static const unsigned char init_common[] = {
0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1,
* YUV2C=1, MY2C=1, MUV2C=1 */
0x42, 0x6b, /* OVLY0=107 */
0x43, 0x00, /* OVLU0=0 white */
0x44, 0x00, /* OVLV0=0 */
0x45, 0x22, /* OVLY1=34 */
0x46, 0xac, /* OVLU1=172 yellow */
0x47, 0x0e, /* OVLV1=14 */
0x48, 0x03, /* OVLY2=3 */
0x49, 0x1d, /* OVLU2=29 cyan */
0x4a, 0xac, /* OVLV2=172 */
0x4b, 0xf0, /* OVLY3=240 */
0x4c, 0xc8, /* OVLU3=200 green */
0x4d, 0xb9, /* OVLV3=185 */
0x4e, 0xd4, /* OVLY4=212 */
0x4f, 0x38, /* OVLU4=56 magenta */
0x50, 0x47, /* OVLV4=71 */
0x51, 0xc1, /* OVLY5=193 */
0x52, 0xe3, /* OVLU5=227 red */
0x53, 0x54, /* OVLV5=84 */
0x54, 0xa3, /* OVLY6=163 */
0x55, 0x54, /* OVLU6=84 blue */
0x56, 0xf2, /* OVLV6=242 */
0x57, 0x90, /* OVLY7=144 */
0x58, 0x00, /* OVLU7=0 black */
0x59, 0x00, /* OVLV7=0 */
0x5a, 0x00, /* CHPS=0 */
0x5b, 0x76, /* GAINU=118 */
0x5c, 0xa5, /* GAINV=165 */
0x5d, 0x3c, /* BLCKL=60 */
0x5e, 0x3a, /* BLNNL=58 */
0x5f, 0x3a, /* CCRS=0, BLNVB=58 */
0x60, 0x00, /* NULL */
/* 0x61 - 0x66 set according to norm */
0x67, 0x00, /* 0 : caption 1st byte odd field */
0x68, 0x00, /* 0 : caption 2nd byte odd field */
0x69, 0x00, /* 0 : caption 1st byte even field */
0x6a, 0x00, /* 0 : caption 2nd byte even field */
0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */
0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
* CBLF=0, ORCV2=0, PRCV2=0 */
0x6d, 0x00, /* SRCM1=0, CCEN=0 */
0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at
* least for PAL */
0x6f, 0x00, /* HTRIG upper bits */
0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */
/* The following should not be needed */
0x71, 0x15, /* BMRQ=0x115 */
0x72, 0x90, /* EMRQ=0x690 */
0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */
0x74, 0x00, /* NULL */
0x75, 0x00, /* NULL */
0x76, 0x00, /* NULL */
0x77, 0x15, /* BRCV=0x115 */
0x78, 0x90, /* ERCV=0x690 */
0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */
/* Field length controls */
0x7a, 0x70, /* FLC=0 */
/* The following should not be needed if SBLN = 1 */
0x7b, 0x16, /* FAL=22 */
0x7c, 0x35, /* LAL=244 */
0x7d, 0x20, /* LAL=244, FAL=22 */
};
static const unsigned char init_pal[] = {
0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1,
* YGS=1, INPI=0, DOWN=0 */
0x62, 0xc8, /* DECTYP=1, BSTA=72 */
0x63, 0xcb, /* FSC0 */
0x64, 0x8a, /* FSC1 */
0x65, 0x09, /* FSC2 */
0x66, 0x2a, /* FSC3 */
};
static const unsigned char init_ntsc[] = {
0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1,
* YGS=1, INPI=0, DOWN=0 */
0x62, 0xe6, /* DECTYP=1, BSTA=102 */
0x63, 0x1f, /* FSC0 */
0x64, 0x7c, /* FSC1 */
0x65, 0xf0, /* FSC2 */
0x66, 0x21, /* FSC3 */
};
static int
saa7185_command (struct i2c_client *client,
unsigned int cmd,
void *arg)
{
struct saa7185 *encoder = i2c_get_clientdata(client);
switch (cmd) {
case 0:
saa7185_write_block(client, init_common,
sizeof(init_common));
switch (encoder->norm) {
case VIDEO_MODE_NTSC:
saa7185_write_block(client, init_ntsc,
sizeof(init_ntsc));
break;
case VIDEO_MODE_PAL:
saa7185_write_block(client, init_pal,
sizeof(init_pal));
break;
}
break;
case ENCODER_GET_CAPABILITIES:
{
struct video_encoder_capability *cap = arg;
cap->flags =
VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
cap->inputs = 1;
cap->outputs = 1;
}
break;
case ENCODER_SET_NORM:
{
int *iarg = arg;
//saa7185_write_block(client, init_common, sizeof(init_common));
switch (*iarg) {
case VIDEO_MODE_NTSC:
saa7185_write_block(client, init_ntsc,
sizeof(init_ntsc));
break;
case VIDEO_MODE_PAL:
saa7185_write_block(client, init_pal,
sizeof(init_pal));
break;
case VIDEO_MODE_SECAM:
default:
return -EINVAL;
}
encoder->norm = *iarg;
}
break;
case ENCODER_SET_INPUT:
{
int *iarg = arg;
/* RJ: *iarg = 0: input is from SA7111
*iarg = 1: input is from ZR36060 */
switch (*iarg) {
case 0:
/* Switch RTCE to 1 */
saa7185_write(client, 0x61,
(encoder->reg[0x61] & 0xf7) | 0x08);
saa7185_write(client, 0x6e, 0x01);
break;
case 1:
/* Switch RTCE to 0 */
saa7185_write(client, 0x61,
(encoder->reg[0x61] & 0xf7) | 0x00);
/* SW: a slight sync problem... */
saa7185_write(client, 0x6e, 0x00);
break;
default:
return -EINVAL;
}
}
break;
case ENCODER_SET_OUTPUT:
{
int *iarg = arg;
/* not much choice of outputs */
if (*iarg != 0) {
return -EINVAL;
}
}
break;
case ENCODER_ENABLE_OUTPUT:
{
int *iarg = arg;
encoder->enable = !!*iarg;
saa7185_write(client, 0x61,
(encoder->reg[0x61] & 0xbf) |
(encoder->enable ? 0x00 : 0x40));
}
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_SAA7185 >> 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_saa7185;
static int
saa7185_detect_client (struct i2c_adapter *adapter,
int address,
int kind)
{
int i;
struct i2c_client *client;
struct saa7185 *encoder;
dprintk(1,
KERN_INFO
"saa7185.c: detecting saa7185 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 = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (client == 0)
return -ENOMEM;
memset(client, 0, sizeof(struct i2c_client));
client->addr = address;
client->adapter = adapter;
client->driver = &i2c_driver_saa7185;
client->flags = I2C_CLIENT_ALLOW_USE;
strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
encoder = kmalloc(sizeof(struct saa7185), GFP_KERNEL);
if (encoder == NULL) {
kfree(client);
return -ENOMEM;
}
memset(encoder, 0, sizeof(struct saa7185));
encoder->norm = VIDEO_MODE_NTSC;
encoder->enable = 1;
i2c_set_clientdata(client, encoder);
i = i2c_attach_client(client);
if (i) {
kfree(client);
kfree(encoder);
return i;
}
i = saa7185_write_block(client, init_common, sizeof(init_common));
if (i >= 0) {
i = saa7185_write_block(client, init_ntsc,
sizeof(init_ntsc));
}
if (i < 0) {
dprintk(1, KERN_ERR "%s_attach: init error %d\n",
I2C_NAME(client), i);
} else {
dprintk(1,
KERN_INFO
"%s_attach: chip version %d at address 0x%x\n",
I2C_NAME(client), saa7185_read(client) >> 5,
client->addr << 1);
}
return 0;
}
static int
saa7185_attach_adapter (struct i2c_adapter *adapter)
{
dprintk(1,
KERN_INFO
"saa7185.c: starting probe for adapter %s (0x%x)\n",
I2C_NAME(adapter), adapter->id);
return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
}
static int
saa7185_detach_client (struct i2c_client *client)
{
struct saa7185 *encoder = i2c_get_clientdata(client);
int err;
err = i2c_detach_client(client);
if (err) {
return err;
}
saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40); /* SW: output off is active */
//saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
kfree(encoder);
kfree(client);
return 0;
}
/* ----------------------------------------------------------------------- */
static struct i2c_driver i2c_driver_saa7185 = {
.owner = THIS_MODULE,
.name = "saa7185", /* name */
.id = I2C_DRIVERID_SAA7185B,
.flags = I2C_DF_NOTIFY,
.attach_adapter = saa7185_attach_adapter,
.detach_client = saa7185_detach_client,
.command = saa7185_command,
};
static int __init
saa7185_init (void)
{
return i2c_add_driver(&i2c_driver_saa7185);
}
static void __exit
saa7185_exit (void)
{
i2c_del_driver(&i2c_driver_saa7185);
}
module_init(saa7185_init);
module_exit(saa7185_exit);
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