3946b4a5bb
The device table is required to load modules based on modaliases. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
337 lines
6.9 KiB
C
337 lines
6.9 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_saa7113 {
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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 initial_registers[] =
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{
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0x01, 0x08,
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0x02, 0xc0,
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0x03, 0x33,
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0x04, 0x00,
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0x05, 0x00,
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0x06, 0xe9,
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0x07, 0x0d,
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0x08, 0xd8,
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0x09, 0x40,
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0x0a, 0x80,
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0x0b, 0x47,
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0x0c, 0x40,
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0x0d, 0x00,
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0x0e, 0x01,
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0x0f, 0x2a,
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0x10, 0x40,
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0x11, 0x0c,
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0x12, 0xfe,
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0x13, 0x00,
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0x14, 0x00,
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0x15, 0x04,
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0x16, 0x00,
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0x17, 0x00,
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0x18, 0x00,
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0x19, 0x00,
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0x1a, 0x00,
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0x1b, 0x00,
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0x1c, 0x00,
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0x1d, 0x00,
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0x1e, 0x00,
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0x1f, 0xc8,
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0x40, 0x00,
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0x41, 0xff,
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0x42, 0xff,
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0x43, 0xff,
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0x44, 0xff,
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0x45, 0xff,
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0x46, 0xff,
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0x47, 0xff,
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0x48, 0xff,
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0x49, 0xff,
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0x4a, 0xff,
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0x4b, 0xff,
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0x4c, 0xff,
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0x4d, 0xff,
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0x4e, 0xff,
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0x4f, 0xff,
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0x50, 0xff,
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0x51, 0xff,
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0x52, 0xff,
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0x53, 0xff,
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0x54, 0xff,
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0x55, 0xff,
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0x56, 0xff,
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0x57, 0xff,
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0x58, 0x00,
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0x59, 0x54,
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0x5a, 0x07,
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0x5b, 0x83,
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0x5c, 0x00,
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0x5d, 0x00,
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0x5e, 0x00,
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0x5f, 0x00,
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0x60, 0x00,
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0x61, 0x00,
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0x00, 0x00, /* Terminator (reg 0x00 is read-only) */
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};
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static int write_reg(struct i2c_client *client, u8 reg, u8 value)
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{
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static int write_regs(struct i2c_client *client, u8 *regs)
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{
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int i;
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for (i = 0; regs[i] != 0x00; i += 2)
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if (i2c_smbus_write_byte_data(client, regs[i], 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_saa7113_command(struct i2c_client *client,
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unsigned int cmd, void *arg)
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{
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struct wis_saa7113 *dec = i2c_get_clientdata(client);
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switch (cmd) {
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case VIDIOC_S_INPUT:
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{
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int *input = arg;
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i2c_smbus_write_byte_data(client, 0x02, 0xC0 | *input);
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i2c_smbus_write_byte_data(client, 0x09,
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*input < 6 ? 0x40 : 0x80);
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break;
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}
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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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dec->norm = *input;
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if (dec->norm & V4L2_STD_NTSC) {
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write_reg(client, 0x0e, 0x01);
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write_reg(client, 0x10, 0x40);
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} else if (dec->norm & V4L2_STD_PAL) {
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write_reg(client, 0x0e, 0x01);
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write_reg(client, 0x10, 0x48);
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} else if (dec->norm * V4L2_STD_SECAM) {
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write_reg(client, 0x0e, 0x50);
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write_reg(client, 0x10, 0x48);
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}
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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 = 127;
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ctrl->step = 1;
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ctrl->default_value = 71;
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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 = 127;
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ctrl->step = 1;
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ctrl->default_value = 64;
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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 = -128;
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ctrl->maximum = 127;
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ctrl->step = 1;
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ctrl->default_value = 0;
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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, 0x0a, dec->brightness);
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break;
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case V4L2_CID_CONTRAST:
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if (ctrl->value > 127)
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dec->contrast = 127;
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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, 0x0b, dec->contrast);
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break;
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case V4L2_CID_SATURATION:
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if (ctrl->value > 127)
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dec->saturation = 127;
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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, 0x0c, dec->saturation);
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break;
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case V4L2_CID_HUE:
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if (ctrl->value > 127)
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dec->hue = 127;
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else if (ctrl->value < -128)
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dec->hue = -128;
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else
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dec->hue = ctrl->value;
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write_reg(client, 0x0d, dec->hue);
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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_saa7113_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_saa7113 *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_saa7113), GFP_KERNEL);
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if (dec == NULL)
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return -ENOMEM;
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dec->norm = V4L2_STD_NTSC;
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dec->brightness = 128;
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dec->contrast = 71;
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dec->saturation = 64;
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dec->hue = 0;
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i2c_set_clientdata(client, dec);
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printk(KERN_DEBUG
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"wis-saa7113: initializing SAA7113 at address %d on %s\n",
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client->addr, adapter->name);
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if (write_regs(client, initial_registers) < 0) {
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printk(KERN_ERR
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"wis-saa7113: error initializing SAA7113\n");
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kfree(dec);
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return -ENODEV;
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}
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return 0;
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}
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static int wis_saa7113_remove(struct i2c_client *client)
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{
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struct wis_saa7113 *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_saa7113_id[] = {
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{ "wis_saa7113", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, wis_saa7113_id);
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static struct i2c_driver wis_saa7113_driver = {
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.driver = {
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.name = "WIS SAA7113 I2C driver",
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},
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.probe = wis_saa7113_probe,
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.remove = wis_saa7113_remove,
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.command = wis_saa7113_command,
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.id_table = wis_saa7113_id,
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};
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static int __init wis_saa7113_init(void)
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{
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return i2c_add_driver(&wis_saa7113_driver);
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}
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static void __exit wis_saa7113_cleanup(void)
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{
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i2c_del_driver(&wis_saa7113_driver);
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}
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module_init(wis_saa7113_init);
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module_exit(wis_saa7113_cleanup);
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MODULE_LICENSE("GPL v2");
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