535 строки
12 KiB
C
535 строки
12 KiB
C
/*
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* adv7175 - adv7175a video encoder driver version 0.0.3
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*
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* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
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* Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
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* Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
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* - some corrections for Pinnacle Systems Inc. DC10plus card.
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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/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/types.h>
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#include <linux/videodev.h>
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#include <asm/uaccess.h>
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MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
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MODULE_AUTHOR("Dave Perks");
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MODULE_LICENSE("GPL");
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#include <linux/i2c.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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struct adv7175 {
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int norm;
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int input;
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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_ADV7175 0xd4
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#define I2C_ADV7176 0x54
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static char adv7175_name[] = "adv7175";
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static char adv7176_name[] = "adv7176";
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static char *inputs[] = { "pass_through", "play_back", "color_bar" };
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static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
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/* ----------------------------------------------------------------------- */
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static inline int
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adv7175_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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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static inline int
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adv7175_read (struct i2c_client *client,
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u8 reg)
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{
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return i2c_smbus_read_byte_data(client, reg);
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}
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static int
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adv7175_write_block (struct i2c_client *client,
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const u8 *data,
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unsigned int len)
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{
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int ret = -1;
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u8 reg;
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/* the adv7175 has an autoincrement function, use it if
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* the adapter understands raw I2C */
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if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
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/* do raw I2C, not smbus compatible */
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u8 block_data[32];
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int block_len;
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while (len >= 2) {
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block_len = 0;
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block_data[block_len++] = reg = data[0];
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do {
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block_data[block_len++] = data[1];
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reg++;
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len -= 2;
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data += 2;
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} while (len >= 2 && data[0] == reg &&
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block_len < 32);
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if ((ret = i2c_master_send(client, block_data,
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block_len)) < 0)
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break;
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}
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} else {
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/* do some slow I2C emulation kind of thing */
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while (len >= 2) {
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reg = *data++;
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if ((ret = adv7175_write(client, reg,
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*data++)) < 0)
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break;
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len -= 2;
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}
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}
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return ret;
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}
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static void
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set_subcarrier_freq (struct i2c_client *client,
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int pass_through)
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{
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/* for some reason pass_through NTSC needs
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* a different sub-carrier freq to remain stable. */
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if(pass_through)
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adv7175_write(client, 0x02, 0x00);
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else
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adv7175_write(client, 0x02, 0x55);
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adv7175_write(client, 0x03, 0x55);
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adv7175_write(client, 0x04, 0x55);
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adv7175_write(client, 0x05, 0x25);
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}
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/* ----------------------------------------------------------------------- */
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// Output filter: S-Video Composite
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#define MR050 0x11 //0x09
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#define MR060 0x14 //0x0c
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//---------------------------------------------------------------------------
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#define TR0MODE 0x46
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#define TR0RST 0x80
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#define TR1CAPT 0x80
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#define TR1PLAY 0x00
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static const unsigned char init_common[] = {
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0x00, MR050, /* MR0, PAL enabled */
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0x01, 0x00, /* MR1 */
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0x02, 0x0c, /* subc. freq. */
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0x03, 0x8c, /* subc. freq. */
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0x04, 0x79, /* subc. freq. */
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0x05, 0x26, /* subc. freq. */
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0x06, 0x40, /* subc. phase */
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0x07, TR0MODE, /* TR0, 16bit */
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0x08, 0x21, /* */
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0x09, 0x00, /* */
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0x0a, 0x00, /* */
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0x0b, 0x00, /* */
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0x0c, TR1CAPT, /* TR1 */
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0x0d, 0x4f, /* MR2 */
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0x0e, 0x00, /* */
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0x0f, 0x00, /* */
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0x10, 0x00, /* */
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0x11, 0x00, /* */
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};
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static const unsigned char init_pal[] = {
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0x00, MR050, /* MR0, PAL enabled */
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0x01, 0x00, /* MR1 */
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0x02, 0x0c, /* subc. freq. */
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0x03, 0x8c, /* subc. freq. */
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0x04, 0x79, /* subc. freq. */
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0x05, 0x26, /* subc. freq. */
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0x06, 0x40, /* subc. phase */
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};
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static const unsigned char init_ntsc[] = {
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0x00, MR060, /* MR0, NTSC enabled */
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0x01, 0x00, /* MR1 */
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0x02, 0x55, /* subc. freq. */
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0x03, 0x55, /* subc. freq. */
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0x04, 0x55, /* subc. freq. */
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0x05, 0x25, /* subc. freq. */
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0x06, 0x1a, /* subc. phase */
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};
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static int
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adv7175_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 adv7175 *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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adv7175_write_block(client, init_common,
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sizeof(init_common));
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adv7175_write(client, 0x07, TR0MODE | TR0RST);
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adv7175_write(client, 0x07, TR0MODE);
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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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cap->flags = VIDEO_ENCODER_PAL |
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VIDEO_ENCODER_NTSC |
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VIDEO_ENCODER_SECAM; /* well, hacky */
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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 = *(int *) arg;
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switch (iarg) {
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case VIDEO_MODE_NTSC:
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adv7175_write_block(client, init_ntsc,
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sizeof(init_ntsc));
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if (encoder->input == 0)
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adv7175_write(client, 0x0d, 0x4f); // Enable genlock
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adv7175_write(client, 0x07, TR0MODE | TR0RST);
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adv7175_write(client, 0x07, TR0MODE);
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break;
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case VIDEO_MODE_PAL:
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adv7175_write_block(client, init_pal,
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sizeof(init_pal));
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if (encoder->input == 0)
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adv7175_write(client, 0x0d, 0x4f); // Enable genlock
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adv7175_write(client, 0x07, TR0MODE | TR0RST);
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adv7175_write(client, 0x07, TR0MODE);
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break;
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case VIDEO_MODE_SECAM: // WARNING! ADV7176 does not support SECAM.
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/* This is an attempt to convert
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* SECAM->PAL (typically it does not work
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* due to genlock: when decoder is in SECAM
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* and encoder in in PAL the subcarrier can
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* not be syncronized with horizontal
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* quency) */
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adv7175_write_block(client, init_pal,
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sizeof(init_pal));
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if (encoder->input == 0)
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adv7175_write(client, 0x0d, 0x49); // Disable genlock
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adv7175_write(client, 0x07, TR0MODE | TR0RST);
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adv7175_write(client, 0x07, TR0MODE);
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break;
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default:
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dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
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I2C_NAME(client), iarg);
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return -EINVAL;
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}
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dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
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norms[iarg]);
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encoder->norm = iarg;
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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 = *(int *) arg;
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/* RJ: *iarg = 0: input is from SAA7110
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*iarg = 1: input is from ZR36060
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*iarg = 2: color bar */
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switch (iarg) {
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case 0:
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adv7175_write(client, 0x01, 0x00);
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if (encoder->norm == VIDEO_MODE_NTSC)
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set_subcarrier_freq(client, 1);
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adv7175_write(client, 0x0c, TR1CAPT); /* TR1 */
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if (encoder->norm == VIDEO_MODE_SECAM)
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adv7175_write(client, 0x0d, 0x49); // Disable genlock
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else
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adv7175_write(client, 0x0d, 0x4f); // Enable genlock
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adv7175_write(client, 0x07, TR0MODE | TR0RST);
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adv7175_write(client, 0x07, TR0MODE);
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//udelay(10);
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break;
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case 1:
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adv7175_write(client, 0x01, 0x00);
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if (encoder->norm == VIDEO_MODE_NTSC)
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set_subcarrier_freq(client, 0);
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adv7175_write(client, 0x0c, TR1PLAY); /* TR1 */
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adv7175_write(client, 0x0d, 0x49);
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adv7175_write(client, 0x07, TR0MODE | TR0RST);
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adv7175_write(client, 0x07, TR0MODE);
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//udelay(10);
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break;
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case 2:
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adv7175_write(client, 0x01, 0x80);
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if (encoder->norm == VIDEO_MODE_NTSC)
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set_subcarrier_freq(client, 0);
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adv7175_write(client, 0x0d, 0x49);
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adv7175_write(client, 0x07, TR0MODE | TR0RST);
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adv7175_write(client, 0x07, TR0MODE);
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//udelay(10);
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break;
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default:
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dprintk(1, KERN_ERR "%s: illegal input: %d\n",
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I2C_NAME(client), iarg);
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return -EINVAL;
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}
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dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
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inputs[iarg]);
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encoder->input = iarg;
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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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/* 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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}
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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[] =
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{ I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
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I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
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I2C_CLIENT_END
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};
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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_adv7175;
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static int
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adv7175_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 adv7175 *encoder;
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char *dname;
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dprintk(1,
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KERN_INFO
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"adv7175.c: detecting adv7175 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 = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
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if (client == 0)
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return -ENOMEM;
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client->addr = address;
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client->adapter = adapter;
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client->driver = &i2c_driver_adv7175;
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if ((client->addr == I2C_ADV7175 >> 1) ||
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(client->addr == (I2C_ADV7175 >> 1) + 1)) {
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dname = adv7175_name;
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} else if ((client->addr == I2C_ADV7176 >> 1) ||
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(client->addr == (I2C_ADV7176 >> 1) + 1)) {
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dname = adv7176_name;
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} else {
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/* We should never get here!!! */
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kfree(client);
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return 0;
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}
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strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
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encoder = kzalloc(sizeof(struct adv7175), 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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encoder->norm = VIDEO_MODE_PAL;
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encoder->input = 0;
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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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i = adv7175_write_block(client, init_common, sizeof(init_common));
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if (i >= 0) {
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i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
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i = adv7175_write(client, 0x07, TR0MODE);
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i = adv7175_read(client, 0x12);
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dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
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I2C_NAME(client), i & 1, client->addr << 1);
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}
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if (i < 0) {
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dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
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I2C_NAME(client), i);
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}
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return 0;
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}
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static int
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adv7175_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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"adv7175.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, &adv7175_detect_client);
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}
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static int
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adv7175_detach_client (struct i2c_client *client)
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{
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struct adv7175 *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_adv7175 = {
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.driver = {
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.name = "adv7175", /* name */
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},
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.id = I2C_DRIVERID_ADV7175,
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.attach_adapter = adv7175_attach_adapter,
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.detach_client = adv7175_detach_client,
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.command = adv7175_command,
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};
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static int __init
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adv7175_init (void)
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{
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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);
|