432 lines
9.2 KiB
C
432 lines
9.2 KiB
C
/*
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* bt856 - BT856A Digital Video Encoder (Rockwell Part)
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*
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* Copyright (C) 1999 Mike Bernson <mike@mlb.org>
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* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
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*
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* Modifications for LML33/DC10plus unified driver
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* Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
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*
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* This code was modify/ported from the saa7111 driver written
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* by Dave Perks.
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*
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* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
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* - moved over to linux>=2.4.x i2c protocol (9/9/2002)
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, 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/delay.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/pci.h>
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#include <linux/signal.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/page.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/videodev.h>
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#include <asm/uaccess.h>
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MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
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MODULE_AUTHOR("Mike Bernson & Dave Perks");
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MODULE_LICENSE("GPL");
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#include <linux/i2c.h>
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#include <linux/i2c-dev.h>
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#define I2C_NAME(s) (s)->name
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#include <linux/video_encoder.h>
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static int debug = 0;
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module_param(debug, int, 0);
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MODULE_PARM_DESC(debug, "Debug level (0-1)");
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#define dprintk(num, format, args...) \
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do { \
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if (debug >= num) \
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printk(format, ##args); \
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} while (0)
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/* ----------------------------------------------------------------------- */
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#define REG_OFFSET 0xCE
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struct bt856 {
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unsigned char reg[32];
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int norm;
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int enable;
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int bright;
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int contrast;
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int hue;
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int sat;
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};
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#define I2C_BT856 0x88
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/* ----------------------------------------------------------------------- */
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static inline int
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bt856_write (struct i2c_client *client,
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u8 reg,
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u8 value)
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{
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struct bt856 *encoder = i2c_get_clientdata(client);
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encoder->reg[reg - REG_OFFSET] = value;
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static inline int
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bt856_setbit (struct i2c_client *client,
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u8 reg,
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u8 bit,
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u8 value)
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{
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struct bt856 *encoder = i2c_get_clientdata(client);
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return bt856_write(client, reg,
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(encoder->
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reg[reg - REG_OFFSET] & ~(1 << bit)) |
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(value ? (1 << bit) : 0));
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}
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static void
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bt856_dump (struct i2c_client *client)
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{
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int i;
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struct bt856 *encoder = i2c_get_clientdata(client);
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printk(KERN_INFO "%s: register dump:", I2C_NAME(client));
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for (i = 0xd6; i <= 0xde; i += 2)
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printk(" %02x", encoder->reg[i - REG_OFFSET]);
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printk("\n");
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}
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/* ----------------------------------------------------------------------- */
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static int
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bt856_command (struct i2c_client *client,
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unsigned int cmd,
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void *arg)
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{
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struct bt856 *encoder = i2c_get_clientdata(client);
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switch (cmd) {
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case 0:
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/* This is just for testing!!! */
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dprintk(1, KERN_INFO "bt856: init\n");
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bt856_write(client, 0xdc, 0x18);
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bt856_write(client, 0xda, 0);
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bt856_write(client, 0xde, 0);
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bt856_setbit(client, 0xdc, 3, 1);
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//bt856_setbit(client, 0xdc, 6, 0);
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bt856_setbit(client, 0xdc, 4, 1);
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switch (encoder->norm) {
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case VIDEO_MODE_NTSC:
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bt856_setbit(client, 0xdc, 2, 0);
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break;
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case VIDEO_MODE_PAL:
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bt856_setbit(client, 0xdc, 2, 1);
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break;
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}
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bt856_setbit(client, 0xdc, 1, 1);
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bt856_setbit(client, 0xde, 4, 0);
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bt856_setbit(client, 0xde, 3, 1);
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if (debug != 0)
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bt856_dump(client);
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break;
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case ENCODER_GET_CAPABILITIES:
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{
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struct video_encoder_capability *cap = arg;
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dprintk(1, KERN_INFO "%s: get capabilities\n",
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I2C_NAME(client));
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cap->flags = VIDEO_ENCODER_PAL |
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VIDEO_ENCODER_NTSC |
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VIDEO_ENCODER_CCIR;
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cap->inputs = 2;
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cap->outputs = 1;
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}
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break;
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case ENCODER_SET_NORM:
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{
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int *iarg = arg;
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dprintk(1, KERN_INFO "%s: set norm %d\n", I2C_NAME(client),
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*iarg);
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switch (*iarg) {
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case VIDEO_MODE_NTSC:
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bt856_setbit(client, 0xdc, 2, 0);
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break;
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case VIDEO_MODE_PAL:
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bt856_setbit(client, 0xdc, 2, 1);
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bt856_setbit(client, 0xda, 0, 0);
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//bt856_setbit(client, 0xda, 0, 1);
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break;
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default:
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return -EINVAL;
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}
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encoder->norm = *iarg;
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if (debug != 0)
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bt856_dump(client);
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}
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break;
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case ENCODER_SET_INPUT:
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{
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int *iarg = arg;
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dprintk(1, KERN_INFO "%s: set input %d\n", I2C_NAME(client),
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*iarg);
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/* We only have video bus.
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* iarg = 0: input is from bt819
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* iarg = 1: input is from ZR36060 */
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switch (*iarg) {
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case 0:
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bt856_setbit(client, 0xde, 4, 0);
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bt856_setbit(client, 0xde, 3, 1);
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bt856_setbit(client, 0xdc, 3, 1);
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bt856_setbit(client, 0xdc, 6, 0);
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break;
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case 1:
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bt856_setbit(client, 0xde, 4, 0);
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bt856_setbit(client, 0xde, 3, 1);
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bt856_setbit(client, 0xdc, 3, 1);
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bt856_setbit(client, 0xdc, 6, 1);
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break;
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case 2: // Color bar
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bt856_setbit(client, 0xdc, 3, 0);
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bt856_setbit(client, 0xde, 4, 1);
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break;
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default:
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return -EINVAL;
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}
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if (debug != 0)
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bt856_dump(client);
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}
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break;
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case ENCODER_SET_OUTPUT:
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{
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int *iarg = arg;
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dprintk(1, KERN_INFO "%s: set output %d\n", I2C_NAME(client),
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*iarg);
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/* not much choice of outputs */
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if (*iarg != 0) {
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return -EINVAL;
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}
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}
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break;
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case ENCODER_ENABLE_OUTPUT:
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{
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int *iarg = arg;
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encoder->enable = !!*iarg;
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dprintk(1, KERN_INFO "%s: enable output %d\n",
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I2C_NAME(client), encoder->enable);
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}
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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/*
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* Generic i2c probe
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* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
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*/
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static unsigned short normal_i2c[] = { I2C_BT856 >> 1, I2C_CLIENT_END };
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static unsigned short ignore = I2C_CLIENT_END;
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static struct i2c_client_address_data addr_data = {
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.normal_i2c = normal_i2c,
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.probe = &ignore,
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.ignore = &ignore,
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};
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static struct i2c_driver i2c_driver_bt856;
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static int
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bt856_detect_client (struct i2c_adapter *adapter,
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int address,
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int kind)
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{
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int i;
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struct i2c_client *client;
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struct bt856 *encoder;
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dprintk(1,
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KERN_INFO
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"bt856.c: detecting bt856 client on address 0x%x\n",
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address << 1);
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return 0;
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client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
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if (client == 0)
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return -ENOMEM;
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memset(client, 0, sizeof(struct i2c_client));
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client->addr = address;
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client->adapter = adapter;
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client->driver = &i2c_driver_bt856;
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strlcpy(I2C_NAME(client), "bt856", sizeof(I2C_NAME(client)));
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encoder = kmalloc(sizeof(struct bt856), GFP_KERNEL);
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if (encoder == NULL) {
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kfree(client);
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return -ENOMEM;
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}
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memset(encoder, 0, sizeof(struct bt856));
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encoder->norm = VIDEO_MODE_NTSC;
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encoder->enable = 1;
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i2c_set_clientdata(client, encoder);
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i = i2c_attach_client(client);
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if (i) {
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kfree(client);
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kfree(encoder);
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return i;
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}
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bt856_write(client, 0xdc, 0x18);
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bt856_write(client, 0xda, 0);
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bt856_write(client, 0xde, 0);
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bt856_setbit(client, 0xdc, 3, 1);
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//bt856_setbit(client, 0xdc, 6, 0);
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bt856_setbit(client, 0xdc, 4, 1);
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switch (encoder->norm) {
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case VIDEO_MODE_NTSC:
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bt856_setbit(client, 0xdc, 2, 0);
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break;
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case VIDEO_MODE_PAL:
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bt856_setbit(client, 0xdc, 2, 1);
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break;
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}
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bt856_setbit(client, 0xdc, 1, 1);
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bt856_setbit(client, 0xde, 4, 0);
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bt856_setbit(client, 0xde, 3, 1);
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if (debug != 0)
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bt856_dump(client);
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dprintk(1, KERN_INFO "%s_attach: at address 0x%x\n", I2C_NAME(client),
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client->addr << 1);
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return 0;
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}
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static int
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bt856_attach_adapter (struct i2c_adapter *adapter)
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{
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dprintk(1,
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KERN_INFO
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"bt856.c: starting probe for adapter %s (0x%x)\n",
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I2C_NAME(adapter), adapter->id);
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return i2c_probe(adapter, &addr_data, &bt856_detect_client);
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}
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static int
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bt856_detach_client (struct i2c_client *client)
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{
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struct bt856 *encoder = i2c_get_clientdata(client);
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int err;
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err = i2c_detach_client(client);
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if (err) {
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return err;
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}
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kfree(encoder);
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kfree(client);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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static struct i2c_driver i2c_driver_bt856 = {
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.driver = {
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.name = "bt856",
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},
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.id = I2C_DRIVERID_BT856,
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.attach_adapter = bt856_attach_adapter,
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.detach_client = bt856_detach_client,
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.command = bt856_command,
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};
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static int __init
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bt856_init (void)
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{
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return i2c_add_driver(&i2c_driver_bt856);
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}
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static void __exit
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bt856_exit (void)
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{
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i2c_del_driver(&i2c_driver_bt856);
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}
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module_init(bt856_init);
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module_exit(bt856_exit);
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