fbae3fb154
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>
359 lines
7.7 KiB
C
359 lines
7.7 KiB
C
/*
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* Copyright (C) 2005-2006 Micronas USA Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/videodev2.h>
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#include <linux/ioctl.h>
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#include <linux/slab.h>
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#include "wis-i2c.h"
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struct wis_tw2804 {
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int channel;
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int norm;
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int brightness;
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int contrast;
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int saturation;
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int hue;
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};
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static u8 global_registers[] =
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{
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0x39, 0x00,
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0x3a, 0xff,
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0x3b, 0x84,
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0x3c, 0x80,
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0x3d, 0x80,
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0x3e, 0x82,
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0x3f, 0x82,
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0xff, 0xff, /* Terminator (reg 0xff does not exist) */
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};
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static u8 channel_registers[] =
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{
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0x01, 0xc4,
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0x02, 0xa5,
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0x03, 0x20,
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0x04, 0xd0,
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0x05, 0x20,
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0x06, 0xd0,
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0x07, 0x88,
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0x08, 0x20,
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0x09, 0x07,
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0x0a, 0xf0,
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0x0b, 0x07,
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0x0c, 0xf0,
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0x0d, 0x40,
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0x0e, 0xd2,
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0x0f, 0x80,
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0x10, 0x80,
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0x11, 0x80,
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0x12, 0x80,
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0x13, 0x1f,
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0x14, 0x00,
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0x15, 0x00,
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0x16, 0x00,
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0x17, 0x00,
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0x18, 0xff,
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0x19, 0xff,
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0x1a, 0xff,
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0x1b, 0xff,
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0x1c, 0xff,
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0x1d, 0xff,
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0x1e, 0xff,
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0x1f, 0xff,
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0x20, 0x07,
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0x21, 0x07,
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0x22, 0x00,
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0x23, 0x91,
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0x24, 0x51,
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0x25, 0x03,
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0x26, 0x00,
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0x27, 0x00,
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0x28, 0x00,
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0x29, 0x00,
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0x2a, 0x00,
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0x2b, 0x00,
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0x2c, 0x00,
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0x2d, 0x00,
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0x2e, 0x00,
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0x2f, 0x00,
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0x30, 0x00,
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0x31, 0x00,
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0x32, 0x00,
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0x33, 0x00,
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0x34, 0x00,
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0x35, 0x00,
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0x36, 0x00,
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0x37, 0x00,
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0xff, 0xff, /* Terminator (reg 0xff does not exist) */
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};
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static int write_reg(struct i2c_client *client, u8 reg, u8 value, int channel)
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{
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return i2c_smbus_write_byte_data(client, reg | (channel << 6), value);
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}
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static int write_regs(struct i2c_client *client, u8 *regs, int channel)
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{
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int i;
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for (i = 0; regs[i] != 0xff; i += 2)
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if (i2c_smbus_write_byte_data(client,
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regs[i] | (channel << 6), regs[i + 1]) < 0)
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return -1;
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return 0;
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}
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static int wis_tw2804_command(struct i2c_client *client,
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unsigned int cmd, void *arg)
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{
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struct wis_tw2804 *dec = i2c_get_clientdata(client);
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if (cmd == DECODER_SET_CHANNEL) {
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int *input = arg;
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if (*input < 0 || *input > 3) {
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printk(KERN_ERR "wis-tw2804: channel %d is not "
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"between 0 and 3!\n", *input);
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return 0;
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}
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dec->channel = *input;
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printk(KERN_DEBUG "wis-tw2804: initializing TW2804 "
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"channel %d\n", dec->channel);
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if (dec->channel == 0 &&
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write_regs(client, global_registers, 0) < 0) {
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printk(KERN_ERR "wis-tw2804: error initializing "
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"TW2804 global registers\n");
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return 0;
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}
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if (write_regs(client, channel_registers, dec->channel) < 0) {
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printk(KERN_ERR "wis-tw2804: error initializing "
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"TW2804 channel %d\n", dec->channel);
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return 0;
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}
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return 0;
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}
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if (dec->channel < 0) {
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printk(KERN_DEBUG "wis-tw2804: ignoring command %08x until "
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"channel number is set\n", cmd);
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return 0;
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}
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switch (cmd) {
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case VIDIOC_S_STD:
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{
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v4l2_std_id *input = arg;
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u8 regs[] = {
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0x01, *input & V4L2_STD_NTSC ? 0xc4 : 0x84,
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0x09, *input & V4L2_STD_NTSC ? 0x07 : 0x04,
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0x0a, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
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0x0b, *input & V4L2_STD_NTSC ? 0x07 : 0x04,
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0x0c, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
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0x0d, *input & V4L2_STD_NTSC ? 0x40 : 0x4a,
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0x16, *input & V4L2_STD_NTSC ? 0x00 : 0x40,
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0x17, *input & V4L2_STD_NTSC ? 0x00 : 0x40,
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0x20, *input & V4L2_STD_NTSC ? 0x07 : 0x0f,
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0x21, *input & V4L2_STD_NTSC ? 0x07 : 0x0f,
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0xff, 0xff,
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};
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write_regs(client, regs, dec->channel);
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dec->norm = *input;
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break;
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}
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case VIDIOC_QUERYCTRL:
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{
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struct v4l2_queryctrl *ctrl = arg;
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switch (ctrl->id) {
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case V4L2_CID_BRIGHTNESS:
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ctrl->type = V4L2_CTRL_TYPE_INTEGER;
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strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
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ctrl->minimum = 0;
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ctrl->maximum = 255;
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ctrl->step = 1;
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ctrl->default_value = 128;
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ctrl->flags = 0;
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break;
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case V4L2_CID_CONTRAST:
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ctrl->type = V4L2_CTRL_TYPE_INTEGER;
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strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
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ctrl->minimum = 0;
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ctrl->maximum = 255;
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ctrl->step = 1;
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ctrl->default_value = 128;
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ctrl->flags = 0;
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break;
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case V4L2_CID_SATURATION:
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ctrl->type = V4L2_CTRL_TYPE_INTEGER;
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strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
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ctrl->minimum = 0;
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ctrl->maximum = 255;
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ctrl->step = 1;
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ctrl->default_value = 128;
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ctrl->flags = 0;
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break;
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case V4L2_CID_HUE:
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ctrl->type = V4L2_CTRL_TYPE_INTEGER;
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strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
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ctrl->minimum = 0;
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ctrl->maximum = 255;
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ctrl->step = 1;
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ctrl->default_value = 128;
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ctrl->flags = 0;
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break;
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}
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break;
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}
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case VIDIOC_S_CTRL:
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{
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struct v4l2_control *ctrl = arg;
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switch (ctrl->id) {
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case V4L2_CID_BRIGHTNESS:
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if (ctrl->value > 255)
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dec->brightness = 255;
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else if (ctrl->value < 0)
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dec->brightness = 0;
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else
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dec->brightness = ctrl->value;
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write_reg(client, 0x12, dec->brightness, dec->channel);
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break;
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case V4L2_CID_CONTRAST:
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if (ctrl->value > 255)
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dec->contrast = 255;
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else if (ctrl->value < 0)
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dec->contrast = 0;
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else
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dec->contrast = ctrl->value;
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write_reg(client, 0x11, dec->contrast, dec->channel);
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break;
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case V4L2_CID_SATURATION:
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if (ctrl->value > 255)
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dec->saturation = 255;
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else if (ctrl->value < 0)
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dec->saturation = 0;
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else
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dec->saturation = ctrl->value;
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write_reg(client, 0x10, dec->saturation, dec->channel);
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break;
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case V4L2_CID_HUE:
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if (ctrl->value > 255)
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dec->hue = 255;
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else if (ctrl->value < 0)
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dec->hue = 0;
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else
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dec->hue = ctrl->value;
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write_reg(client, 0x0f, dec->hue, dec->channel);
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break;
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}
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break;
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}
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case VIDIOC_G_CTRL:
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{
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struct v4l2_control *ctrl = arg;
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switch (ctrl->id) {
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case V4L2_CID_BRIGHTNESS:
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ctrl->value = dec->brightness;
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break;
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case V4L2_CID_CONTRAST:
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ctrl->value = dec->contrast;
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break;
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case V4L2_CID_SATURATION:
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ctrl->value = dec->saturation;
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break;
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case V4L2_CID_HUE:
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ctrl->value = dec->hue;
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break;
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}
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break;
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}
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default:
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break;
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}
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return 0;
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}
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static int wis_tw2804_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct i2c_adapter *adapter = client->adapter;
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struct wis_tw2804 *dec;
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -ENODEV;
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dec = kmalloc(sizeof(struct wis_tw2804), GFP_KERNEL);
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if (dec == NULL)
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return -ENOMEM;
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dec->channel = -1;
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dec->norm = V4L2_STD_NTSC;
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dec->brightness = 128;
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dec->contrast = 128;
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dec->saturation = 128;
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dec->hue = 128;
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i2c_set_clientdata(client, dec);
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printk(KERN_DEBUG "wis-tw2804: creating TW2804 at address %d on %s\n",
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client->addr, adapter->name);
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return 0;
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}
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static int wis_tw2804_remove(struct i2c_client *client)
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{
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struct wis_tw2804 *dec = i2c_get_clientdata(client);
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kfree(dec);
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return 0;
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}
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static const struct i2c_device_id wis_tw2804_id[] = {
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{ "wis_tw2804", 0 },
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{ }
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};
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static struct i2c_driver wis_tw2804_driver = {
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.driver = {
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.name = "WIS TW2804 I2C driver",
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},
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.probe = wis_tw2804_probe,
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.remove = wis_tw2804_remove,
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.command = wis_tw2804_command,
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.id_table = wis_tw2804_id,
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};
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static int __init wis_tw2804_init(void)
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{
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return i2c_add_driver(&wis_tw2804_driver);
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}
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static void __exit wis_tw2804_cleanup(void)
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{
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i2c_del_driver(&wis_tw2804_driver);
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}
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module_init(wis_tw2804_init);
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module_exit(wis_tw2804_cleanup);
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MODULE_LICENSE("GPL v2");
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