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linux-2.6/drivers/staging/go7007/wis-saa7115.c
Wolfram Sang fbae3fb154 i2c: Remove all i2c_set_clientdata(client, NULL) in drivers 
I2C drivers can use the clientdata-pointer to point to private data. As I2C
devices are not really unregistered, but merely detached from their driver, it
used to be the drivers obligation to clear this pointer during remove() or a
failed probe(). As a couple of drivers forgot to do this, it was agreed that it
was cleaner if the i2c-core does this clearance when appropriate, as there is
no guarantee for the lifetime of the clientdata-pointer after remove() anyhow.
This feature was added to the core with commit
e4a7b9b04d to fix the faulty drivers.

As there is no need anymore to clear the clientdata-pointer, remove all current
occurrences in the drivers to simplify the code and prevent confusion.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Richard Purdie <rpurdie@linux.intel.com>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-06-03 11:33:58 +02:00

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9.6 KiB
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/*
* Copyright (C) 2005-2006 Micronas USA Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* 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., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <linux/ioctl.h>
#include <linux/slab.h>
#include "wis-i2c.h"
struct wis_saa7115 {
int norm;
int brightness;
int contrast;
int saturation;
int hue;
};
static u8 initial_registers[] =
{
0x01, 0x08,
0x02, 0xc0,
0x03, 0x20,
0x04, 0x80,
0x05, 0x80,
0x06, 0xeb,
0x07, 0xe0,
0x08, 0xf0, /* always toggle FID */
0x09, 0x40,
0x0a, 0x80,
0x0b, 0x40,
0x0c, 0x40,
0x0d, 0x00,
0x0e, 0x03,
0x0f, 0x2a,
0x10, 0x0e,
0x11, 0x00,
0x12, 0x8d,
0x13, 0x00,
0x14, 0x00,
0x15, 0x11,
0x16, 0x01,
0x17, 0xda,
0x18, 0x40,
0x19, 0x80,
0x1a, 0x00,
0x1b, 0x42,
0x1c, 0xa9,
0x30, 0x66,
0x31, 0x90,
0x32, 0x01,
0x34, 0x00,
0x35, 0x00,
0x36, 0x20,
0x38, 0x03,
0x39, 0x20,
0x3a, 0x88,
0x40, 0x00,
0x41, 0xff,
0x42, 0xff,
0x43, 0xff,
0x44, 0xff,
0x45, 0xff,
0x46, 0xff,
0x47, 0xff,
0x48, 0xff,
0x49, 0xff,
0x4a, 0xff,
0x4b, 0xff,
0x4c, 0xff,
0x4d, 0xff,
0x4e, 0xff,
0x4f, 0xff,
0x50, 0xff,
0x51, 0xff,
0x52, 0xff,
0x53, 0xff,
0x54, 0xf4 /*0xff*/,
0x55, 0xff,
0x56, 0xff,
0x57, 0xff,
0x58, 0x40,
0x59, 0x47,
0x5a, 0x06 /*0x03*/,
0x5b, 0x83,
0x5d, 0x06,
0x5e, 0x00,
0x80, 0x30, /* window defined scaler operation, task A and B enabled */
0x81, 0x03, /* use scaler datapath generated V */
0x83, 0x00,
0x84, 0x00,
0x85, 0x00,
0x86, 0x45,
0x87, 0x31,
0x88, 0xc0,
0x90, 0x02, /* task A process top field */
0x91, 0x08,
0x92, 0x09,
0x93, 0x80,
0x94, 0x06,
0x95, 0x00,
0x96, 0xc0,
0x97, 0x02,
0x98, 0x12,
0x99, 0x00,
0x9a, 0xf2,
0x9b, 0x00,
0x9c, 0xd0,
0x9d, 0x02,
0x9e, 0xf2,
0x9f, 0x00,
0xa0, 0x01,
0xa1, 0x01,
0xa2, 0x01,
0xa4, 0x80,
0xa5, 0x40,
0xa6, 0x40,
0xa8, 0x00,
0xa9, 0x04,
0xaa, 0x00,
0xac, 0x00,
0xad, 0x02,
0xae, 0x00,
0xb0, 0x00,
0xb1, 0x04,
0xb2, 0x00,
0xb3, 0x04,
0xb4, 0x00,
0xb8, 0x00,
0xbc, 0x00,
0xc0, 0x03, /* task B process bottom field */
0xc1, 0x08,
0xc2, 0x09,
0xc3, 0x80,
0xc4, 0x06,
0xc5, 0x00,
0xc6, 0xc0,
0xc7, 0x02,
0xc8, 0x12,
0xc9, 0x00,
0xca, 0xf2,
0xcb, 0x00,
0xcc, 0xd0,
0xcd, 0x02,
0xce, 0xf2,
0xcf, 0x00,
0xd0, 0x01,
0xd1, 0x01,
0xd2, 0x01,
0xd4, 0x80,
0xd5, 0x40,
0xd6, 0x40,
0xd8, 0x00,
0xd9, 0x04,
0xda, 0x00,
0xdc, 0x00,
0xdd, 0x02,
0xde, 0x00,
0xe0, 0x00,
0xe1, 0x04,
0xe2, 0x00,
0xe3, 0x04,
0xe4, 0x00,
0xe8, 0x00,
0x88, 0xf0, /* End of original static list */
0x00, 0x00, /* Terminator (reg 0x00 is read-only) */
};
static int write_reg(struct i2c_client *client, u8 reg, u8 value)
{
return i2c_smbus_write_byte_data(client, reg, value);
}
static int write_regs(struct i2c_client *client, u8 *regs)
{
int i;
for (i = 0; regs[i] != 0x00; i += 2)
if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0)
return -1;
return 0;
}
static int wis_saa7115_command(struct i2c_client *client,
unsigned int cmd, void *arg)
{
struct wis_saa7115 *dec = i2c_get_clientdata(client);
switch (cmd) {
case VIDIOC_S_INPUT:
{
int *input = arg;
i2c_smbus_write_byte_data(client, 0x02, 0xC0 | *input);
i2c_smbus_write_byte_data(client, 0x09,
*input < 6 ? 0x40 : 0xC0);
break;
}
case DECODER_SET_RESOLUTION:
{
struct video_decoder_resolution *res = arg;
/* Course-grained scaler */
int h_integer_scaler = res->width < 704 ? 704 / res->width : 1;
/* Fine-grained scaler to take care of remainder */
int h_scaling_increment = (704 / h_integer_scaler) *
1024 / res->width;
/* Fine-grained scaler only */
int v_scaling_increment = (dec->norm & V4L2_STD_NTSC ?
240 : 288) * 1024 / res->height;
u8 regs[] = {
0x88, 0xc0,
0x9c, res->width & 0xff,
0x9d, res->width >> 8,
0x9e, res->height & 0xff,
0x9f, res->height >> 8,
0xa0, h_integer_scaler,
0xa1, 1,
0xa2, 1,
0xa8, h_scaling_increment & 0xff,
0xa9, h_scaling_increment >> 8,
0xac, (h_scaling_increment / 2) & 0xff,
0xad, (h_scaling_increment / 2) >> 8,
0xb0, v_scaling_increment & 0xff,
0xb1, v_scaling_increment >> 8,
0xb2, v_scaling_increment & 0xff,
0xb3, v_scaling_increment >> 8,
0xcc, res->width & 0xff,
0xcd, res->width >> 8,
0xce, res->height & 0xff,
0xcf, res->height >> 8,
0xd0, h_integer_scaler,
0xd1, 1,
0xd2, 1,
0xd8, h_scaling_increment & 0xff,
0xd9, h_scaling_increment >> 8,
0xdc, (h_scaling_increment / 2) & 0xff,
0xdd, (h_scaling_increment / 2) >> 8,
0xe0, v_scaling_increment & 0xff,
0xe1, v_scaling_increment >> 8,
0xe2, v_scaling_increment & 0xff,
0xe3, v_scaling_increment >> 8,
0x88, 0xf0,
0, 0,
};
write_regs(client, regs);
break;
}
case VIDIOC_S_STD:
{
v4l2_std_id *input = arg;
u8 regs[] = {
0x88, 0xc0,
0x98, *input & V4L2_STD_NTSC ? 0x12 : 0x16,
0x9a, *input & V4L2_STD_NTSC ? 0xf2 : 0x20,
0x9b, *input & V4L2_STD_NTSC ? 0x00 : 0x01,
0xc8, *input & V4L2_STD_NTSC ? 0x12 : 0x16,
0xca, *input & V4L2_STD_NTSC ? 0xf2 : 0x20,
0xcb, *input & V4L2_STD_NTSC ? 0x00 : 0x01,
0x88, 0xf0,
0x30, *input & V4L2_STD_NTSC ? 0x66 : 0x00,
0x31, *input & V4L2_STD_NTSC ? 0x90 : 0xe0,
0, 0,
};
write_regs(client, regs);
dec->norm = *input;
break;
}
case VIDIOC_QUERYCTRL:
{
struct v4l2_queryctrl *ctrl = arg;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
ctrl->minimum = 0;
ctrl->maximum = 255;
ctrl->step = 1;
ctrl->default_value = 128;
ctrl->flags = 0;
break;
case V4L2_CID_CONTRAST:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
ctrl->minimum = 0;
ctrl->maximum = 127;
ctrl->step = 1;
ctrl->default_value = 64;
ctrl->flags = 0;
break;
case V4L2_CID_SATURATION:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
ctrl->minimum = 0;
ctrl->maximum = 127;
ctrl->step = 1;
ctrl->default_value = 64;
ctrl->flags = 0;
break;
case V4L2_CID_HUE:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
ctrl->minimum = -128;
ctrl->maximum = 127;
ctrl->step = 1;
ctrl->default_value = 0;
ctrl->flags = 0;
break;
}
break;
}
case VIDIOC_S_CTRL:
{
struct v4l2_control *ctrl = arg;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
if (ctrl->value > 255)
dec->brightness = 255;
else if (ctrl->value < 0)
dec->brightness = 0;
else
dec->brightness = ctrl->value;
write_reg(client, 0x0a, dec->brightness);
break;
case V4L2_CID_CONTRAST:
if (ctrl->value > 127)
dec->contrast = 127;
else if (ctrl->value < 0)
dec->contrast = 0;
else
dec->contrast = ctrl->value;
write_reg(client, 0x0b, dec->contrast);
break;
case V4L2_CID_SATURATION:
if (ctrl->value > 127)
dec->saturation = 127;
else if (ctrl->value < 0)
dec->saturation = 0;
else
dec->saturation = ctrl->value;
write_reg(client, 0x0c, dec->saturation);
break;
case V4L2_CID_HUE:
if (ctrl->value > 127)
dec->hue = 127;
else if (ctrl->value < -128)
dec->hue = -128;
else
dec->hue = ctrl->value;
write_reg(client, 0x0d, dec->hue);
break;
}
break;
}
case VIDIOC_G_CTRL:
{
struct v4l2_control *ctrl = arg;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
ctrl->value = dec->brightness;
break;
case V4L2_CID_CONTRAST:
ctrl->value = dec->contrast;
break;
case V4L2_CID_SATURATION:
ctrl->value = dec->saturation;
break;
case V4L2_CID_HUE:
ctrl->value = dec->hue;
break;
}
break;
}
default:
break;
}
return 0;
}
static int wis_saa7115_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
struct wis_saa7115 *dec;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
dec = kmalloc(sizeof(struct wis_saa7115), GFP_KERNEL);
if (dec == NULL)
return -ENOMEM;
dec->norm = V4L2_STD_NTSC;
dec->brightness = 128;
dec->contrast = 64;
dec->saturation = 64;
dec->hue = 0;
i2c_set_clientdata(client, dec);
printk(KERN_DEBUG
"wis-saa7115: initializing SAA7115 at address %d on %s\n",
client->addr, adapter->name);
if (write_regs(client, initial_registers) < 0) {
printk(KERN_ERR
"wis-saa7115: error initializing SAA7115\n");
kfree(dec);
return -ENODEV;
}
return 0;
}
static int wis_saa7115_remove(struct i2c_client *client)
{
struct wis_saa7115 *dec = i2c_get_clientdata(client);
kfree(dec);
return 0;
}
static const struct i2c_device_id wis_saa7115_id[] = {
{ "wis_saa7115", 0 },
{ }
};
static struct i2c_driver wis_saa7115_driver = {
.driver = {
.name = "WIS SAA7115 I2C driver",
},
.probe = wis_saa7115_probe,
.remove = wis_saa7115_remove,
.command = wis_saa7115_command,
.id_table = wis_saa7115_id,
};
static int __init wis_saa7115_init(void)
{
return i2c_add_driver(&wis_saa7115_driver);
}
static void __exit wis_saa7115_cleanup(void)
{
i2c_del_driver(&wis_saa7115_driver);
}
module_init(wis_saa7115_init);
module_exit(wis_saa7115_cleanup);
MODULE_LICENSE("GPL v2");
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