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linux/drivers/media/video/adv7175.c
Jean Delvare b3d5496ea5 [PATCH] I2C: Kill address ranges in non-sensors i2c chip drivers 
Some months ago, you killed the address ranges mechanism from all
sensors i2c chip drivers (both the module parameters and the in-code
address lists). I think it was a very good move, as the ranges can
easily be replaced by individual addresses, and this allowed for
significant cleanups in the i2c core (let alone the impressive size
shrink for all these drivers).

Unfortunately you did not do the same for non-sensors i2c chip drivers.
These need the address ranges even less, so we could get rid of the
ranges here as well for another significant i2c core cleanup. Here comes
a patch which does just that. Since the process is exactly the same as
what you did for the other drivers set already, I did not split this one
in parts.

A documentation update is included.

The change saves 308 bytes in the i2c core, and an average 1382 bytes
for chip drivers which use I2C_CLIENT_INSMOD, 126 bytes for those which
do not.

This change is required if we want to merge the sensors and non-sensors
i2c code (and we want to do this).

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Index: gregkh-2.6/Documentation/i2c/writing-clients
===================================================================
2005-06-21 21:51:48 -07:00

580 lines
14 KiB
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/*
* adv7175 - adv7175a video encoder driver version 0.0.3
*
* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
* Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
* Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
* - some corrections for Pinnacle Systems Inc. DC10plus card.
*
* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
* - moved over to linux>=2.4.x i2c protocol (9/9/2002)
*
* 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("Analog Devices ADV7175 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 adv7175 {
unsigned char reg[128];
int norm;
int input;
int enable;
int bright;
int contrast;
int hue;
int sat;
};
#define I2C_ADV7175 0xd4
#define I2C_ADV7176 0x54
static char adv7175_name[] = "adv7175";
static char adv7176_name[] = "adv7176";
static char *inputs[] = { "pass_through", "play_back", "color_bar" };
static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
/* ----------------------------------------------------------------------- */
static inline int
adv7175_write (struct i2c_client *client,
u8 reg,
u8 value)
{
struct adv7175 *encoder = i2c_get_clientdata(client);
encoder->reg[reg] = value;
return i2c_smbus_write_byte_data(client, reg, value);
}
static inline int
adv7175_read (struct i2c_client *client,
u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
static int
adv7175_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 adv7175 *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 = adv7175_write(client, reg,
*data++)) < 0)
break;
len -= 2;
}
}
return ret;
}
static void
set_subcarrier_freq (struct i2c_client *client,
int pass_through)
{
/* for some reason pass_through NTSC needs
* a different sub-carrier freq to remain stable. */
if(pass_through)
adv7175_write(client, 0x02, 0x00);
else
adv7175_write(client, 0x02, 0x55);
adv7175_write(client, 0x03, 0x55);
adv7175_write(client, 0x04, 0x55);
adv7175_write(client, 0x05, 0x25);
}
#ifdef ENCODER_DUMP
static void
dump (struct i2c_client *client)
{
struct adv7175 *encoder = i2c_get_clientdata(client);
int i, j;
printk(KERN_INFO "%s: registry dump\n", I2C_NAME(client));
for (i = 0; i < 182 / 8; i++) {
printk("%s: 0x%02x -", I2C_NAME(client), i * 8);
for (j = 0; j < 8; j++) {
printk(" 0x%02x", encoder->reg[i * 8 + j]);
}
printk("\n");
}
}
#endif
/* ----------------------------------------------------------------------- */
// Output filter: S-Video Composite
#define MR050 0x11 //0x09
#define MR060 0x14 //0x0c
//---------------------------------------------------------------------------
#define TR0MODE 0x46
#define TR0RST 0x80
#define TR1CAPT 0x80
#define TR1PLAY 0x00
static const unsigned char init_common[] = {
0x00, MR050, /* MR0, PAL enabled */
0x01, 0x00, /* MR1 */
0x02, 0x0c, /* subc. freq. */
0x03, 0x8c, /* subc. freq. */
0x04, 0x79, /* subc. freq. */
0x05, 0x26, /* subc. freq. */
0x06, 0x40, /* subc. phase */
0x07, TR0MODE, /* TR0, 16bit */
0x08, 0x21, /* */
0x09, 0x00, /* */
0x0a, 0x00, /* */
0x0b, 0x00, /* */
0x0c, TR1CAPT, /* TR1 */
0x0d, 0x4f, /* MR2 */
0x0e, 0x00, /* */
0x0f, 0x00, /* */
0x10, 0x00, /* */
0x11, 0x00, /* */
};
static const unsigned char init_pal[] = {
0x00, MR050, /* MR0, PAL enabled */
0x01, 0x00, /* MR1 */
0x02, 0x0c, /* subc. freq. */
0x03, 0x8c, /* subc. freq. */
0x04, 0x79, /* subc. freq. */
0x05, 0x26, /* subc. freq. */
0x06, 0x40, /* subc. phase */
};
static const unsigned char init_ntsc[] = {
0x00, MR060, /* MR0, NTSC enabled */
0x01, 0x00, /* MR1 */
0x02, 0x55, /* subc. freq. */
0x03, 0x55, /* subc. freq. */
0x04, 0x55, /* subc. freq. */
0x05, 0x25, /* subc. freq. */
0x06, 0x1a, /* subc. phase */
};
static int
adv7175_command (struct i2c_client *client,
unsigned int cmd,
void *arg)
{
struct adv7175 *encoder = i2c_get_clientdata(client);
switch (cmd) {
case 0:
/* This is just for testing!!! */
adv7175_write_block(client, init_common,
sizeof(init_common));
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
break;
case ENCODER_GET_CAPABILITIES:
{
struct video_encoder_capability *cap = arg;
cap->flags = VIDEO_ENCODER_PAL |
VIDEO_ENCODER_NTSC |
VIDEO_ENCODER_SECAM; /* well, hacky */
cap->inputs = 2;
cap->outputs = 1;
}
break;
case ENCODER_SET_NORM:
{
int iarg = *(int *) arg;
switch (iarg) {
case VIDEO_MODE_NTSC:
adv7175_write_block(client, init_ntsc,
sizeof(init_ntsc));
if (encoder->input == 0)
adv7175_write(client, 0x0d, 0x4f); // Enable genlock
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
break;
case VIDEO_MODE_PAL:
adv7175_write_block(client, init_pal,
sizeof(init_pal));
if (encoder->input == 0)
adv7175_write(client, 0x0d, 0x4f); // Enable genlock
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
break;
case VIDEO_MODE_SECAM: // WARNING! ADV7176 does not support SECAM.
/* This is an attempt to convert
* SECAM->PAL (typically it does not work
* due to genlock: when decoder is in SECAM
* and encoder in in PAL the subcarrier can
* not be syncronized with horizontal
* quency) */
adv7175_write_block(client, init_pal,
sizeof(init_pal));
if (encoder->input == 0)
adv7175_write(client, 0x0d, 0x49); // Disable genlock
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
break;
default:
dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
I2C_NAME(client), iarg);
return -EINVAL;
}
dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
norms[iarg]);
encoder->norm = iarg;
}
break;
case ENCODER_SET_INPUT:
{
int iarg = *(int *) arg;
/* RJ: *iarg = 0: input is from SAA7110
*iarg = 1: input is from ZR36060
*iarg = 2: color bar */
switch (iarg) {
case 0:
adv7175_write(client, 0x01, 0x00);
if (encoder->norm == VIDEO_MODE_NTSC)
set_subcarrier_freq(client, 1);
adv7175_write(client, 0x0c, TR1CAPT); /* TR1 */
if (encoder->norm == VIDEO_MODE_SECAM)
adv7175_write(client, 0x0d, 0x49); // Disable genlock
else
adv7175_write(client, 0x0d, 0x4f); // Enable genlock
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
//udelay(10);
break;
case 1:
adv7175_write(client, 0x01, 0x00);
if (encoder->norm == VIDEO_MODE_NTSC)
set_subcarrier_freq(client, 0);
adv7175_write(client, 0x0c, TR1PLAY); /* TR1 */
adv7175_write(client, 0x0d, 0x49);
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
//udelay(10);
break;
case 2:
adv7175_write(client, 0x01, 0x80);
if (encoder->norm == VIDEO_MODE_NTSC)
set_subcarrier_freq(client, 0);
adv7175_write(client, 0x0d, 0x49);
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
//udelay(10);
break;
default:
dprintk(1, KERN_ERR "%s: illegal input: %d\n",
I2C_NAME(client), iarg);
return -EINVAL;
}
dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
inputs[iarg]);
encoder->input = iarg;
}
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;
}
break;
#ifdef ENCODER_DUMP
case ENCODER_DUMP:
{
dump(client);
}
break;
#endif
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_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
I2C_CLIENT_END
};
static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static unsigned short force[2] = { I2C_CLIENT_END , I2C_CLIENT_END };
static struct i2c_client_address_data addr_data = {
.normal_i2c = normal_i2c,
.probe = probe,
.ignore = ignore,
.force = force
};
static struct i2c_driver i2c_driver_adv7175;
static int
adv7175_detect_client (struct i2c_adapter *adapter,
int address,
int kind)
{
int i;
struct i2c_client *client;
struct adv7175 *encoder;
char *dname;
dprintk(1,
KERN_INFO
"adv7175.c: detecting adv7175 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_adv7175;
client->flags = I2C_CLIENT_ALLOW_USE;
if ((client->addr == I2C_ADV7175 >> 1) ||
(client->addr == (I2C_ADV7175 >> 1) + 1)) {
dname = adv7175_name;
} else if ((client->addr == I2C_ADV7176 >> 1) ||
(client->addr == (I2C_ADV7176 >> 1) + 1)) {
dname = adv7176_name;
} else {
/* We should never get here!!! */
kfree(client);
return 0;
}
strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
encoder = kmalloc(sizeof(struct adv7175), GFP_KERNEL);
if (encoder == NULL) {
kfree(client);
return -ENOMEM;
}
memset(encoder, 0, sizeof(struct adv7175));
encoder->norm = VIDEO_MODE_PAL;
encoder->input = 0;
encoder->enable = 1;
i2c_set_clientdata(client, encoder);
i = i2c_attach_client(client);
if (i) {
kfree(client);
kfree(encoder);
return i;
}
i = adv7175_write_block(client, init_common, sizeof(init_common));
if (i >= 0) {
i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
i = adv7175_write(client, 0x07, TR0MODE);
i = adv7175_read(client, 0x12);
dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
I2C_NAME(client), i & 1, client->addr << 1);
}
if (i < 0) {
dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
I2C_NAME(client), i);
}
return 0;
}
static int
adv7175_attach_adapter (struct i2c_adapter *adapter)
{
dprintk(1,
KERN_INFO
"adv7175.c: starting probe for adapter %s (0x%x)\n",
I2C_NAME(adapter), adapter->id);
return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
}
static int
adv7175_detach_client (struct i2c_client *client)
{
struct adv7175 *encoder = i2c_get_clientdata(client);
int err;
err = i2c_detach_client(client);
if (err) {
return err;
}
kfree(encoder);
kfree(client);
return 0;
}
/* ----------------------------------------------------------------------- */
static struct i2c_driver i2c_driver_adv7175 = {
.owner = THIS_MODULE,
.name = "adv7175", /* name */
.id = I2C_DRIVERID_ADV7175,
.flags = I2C_DF_NOTIFY,
.attach_adapter = adv7175_attach_adapter,
.detach_client = adv7175_detach_client,
.command = adv7175_command,
};
static int __init
adv7175_init (void)
{
return i2c_add_driver(&i2c_driver_adv7175);
}
static void __exit
adv7175_exit (void)
{
i2c_del_driver(&i2c_driver_adv7175);
}
module_init(adv7175_init);
module_exit(adv7175_exit);
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