adv7175.c
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:11k
- #define DEBUGLEVEL 0
- /*
- adv7175 - adv7175a video encoder driver version 0.0.3
- Copyright (C) 1998 Dave Perks <dperks@ibm.net>
- Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
- Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
- - some corrections for Pinnacle Systems Inc. DC10plus card.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/delay.h>
- #include <linux/errno.h>
- #include <linux/fs.h>
- #include <linux/kernel.h>
- #include <linux/major.h>
- #include <linux/slab.h>
- #include <linux/mm.h>
- #include <linux/pci.h>
- #include <linux/signal.h>
- #include <asm/io.h>
- #include <asm/pgtable.h>
- #include <asm/page.h>
- #include <linux/sched.h>
- #include <asm/segment.h>
- #include <linux/types.h>
- #include <linux/wrapper.h>
- #include <linux/videodev.h>
- #include <linux/version.h>
- #include <asm/uaccess.h>
- #include <linux/i2c-old.h>
- #include <linux/video_encoder.h>
- #if (DEBUGLEVEL > 0)
- #define DEBUG(x...) x /* Debug driver */
- #else
- #define DEBUG(x...)
- #endif
- /* ----------------------------------------------------------------------- */
- struct adv7175 {
- struct i2c_bus *bus;
- int addr;
- unsigned char reg[128];
- int norm;
- int input;
- int enable;
- int bright;
- int contrast;
- int hue;
- int sat;
- };
- #define I2C_ADV7175 0xd4
- #define I2C_ADV7176 0x54
- static char adv7175_name[] = "adv7175";
- static char adv7176_name[] = "adv7176";
- static char unknown_name[] = "UNKNOWN";
- #if (DEBUGLEVEL > 0)
- static char *inputs[] = { "pass_through", "play_back", "color_bar" };
- static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
- #endif
- #define I2C_DELAY 10
- /* ----------------------------------------------------------------------- */
- static int adv7175_write(struct adv7175 *dev, unsigned char subaddr, unsigned char data)
- {
- int ack;
- LOCK_I2C_BUS(dev->bus);
- i2c_start(dev->bus);
- i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
- i2c_sendbyte(dev->bus, subaddr, I2C_DELAY);
- ack = i2c_sendbyte(dev->bus, data, I2C_DELAY);
- dev->reg[subaddr] = data;
- i2c_stop(dev->bus);
- UNLOCK_I2C_BUS(dev->bus);
- return ack;
- }
- static unsigned char adv7175_read(struct adv7175 *dev, unsigned char subaddr)
- {
- unsigned char data;
- LOCK_I2C_BUS(dev->bus);
- i2c_start(dev->bus);
- i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
- i2c_sendbyte(dev->bus, subaddr, I2C_DELAY);
- i2c_sendbyte(dev->bus, dev->addr + 1, I2C_DELAY);
- data = i2c_readbyte(dev->bus, 1);
- dev->reg[subaddr] = data;
- i2c_stop(dev->bus);
- UNLOCK_I2C_BUS(dev->bus);
- return data;
- }
- static int adv7175_write_block(struct adv7175 *dev,
- unsigned const char *data, unsigned int len)
- {
- int ack = 0;
- unsigned subaddr;
- while (len > 1) {
- LOCK_I2C_BUS(dev->bus);
- i2c_start(dev->bus);
- i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
- ack = i2c_sendbyte(dev->bus, (subaddr = *data++), I2C_DELAY);
- ack = i2c_sendbyte(dev->bus, (dev->reg[subaddr] = *data++), I2C_DELAY);
- len -= 2;
- while (len > 1 && *data == ++subaddr) {
- data++;
- ack = i2c_sendbyte(dev->bus, (dev->reg[subaddr] = *data++), I2C_DELAY);
- len -= 2;
- }
- i2c_stop(dev->bus);
- UNLOCK_I2C_BUS(dev->bus);
- }
- return ack;
- }
- /* ----------------------------------------------------------------------- */
- // Output filter: S-Video Composite
- #define MR050 0x11 //0x09
- #define MR060 0x14 //0x0c
- //---------------------------------------------------------------------------
- #define TR0MODE 0x46
- #define TR0RST 0x80
- #define TR1CAPT 0x80
- #define TR1PLAY 0x00
- static const unsigned char init_common[] = {
- 0x00, MR050, /* MR0, PAL enabled */
- 0x01, 0x00, /* MR1 */
- 0x02, 0x0c, /* subc. freq. */
- 0x03, 0x8c, /* subc. freq. */
- 0x04, 0x79, /* subc. freq. */
- 0x05, 0x26, /* subc. freq. */
- 0x06, 0x40, /* subc. phase */
- 0x07, TR0MODE, /* TR0, 16bit */
- 0x08, 0x21, /* */
- 0x09, 0x00, /* */
- 0x0a, 0x00, /* */
- 0x0b, 0x00, /* */
- 0x0c, TR1CAPT, /* TR1 */
- 0x0d, 0x4f, /* MR2 */
- 0x0e, 0x00, /* */
- 0x0f, 0x00, /* */
- 0x10, 0x00, /* */
- 0x11, 0x00, /* */
- 0x12, 0x00, /* MR3 */
- 0x24, 0x00, /* */
- };
- static const unsigned char init_pal[] = {
- 0x00, MR050, /* MR0, PAL enabled */
- 0x01, 0x00, /* MR1 */
- 0x02, 0x0c, /* subc. freq. */
- 0x03, 0x8c, /* subc. freq. */
- 0x04, 0x79, /* subc. freq. */
- 0x05, 0x26, /* subc. freq. */
- 0x06, 0x40, /* subc. phase */
- };
- static const unsigned char init_ntsc[] = {
- 0x00, MR060, /* MR0, NTSC enabled */
- 0x01, 0x00, /* MR1 */
- 0x02, 0x55, /* subc. freq. */
- 0x03, 0x55, /* subc. freq. */
- 0x04, 0x55, /* subc. freq. */
- 0x05, 0x25, /* subc. freq. */
- 0x06, 0x1a, /* subc. phase */
- };
- static int adv7175_attach(struct i2c_device *device)
- {
- int i;
- struct adv7175 *encoder;
- char *dname;
- MOD_INC_USE_COUNT;
- device->data = encoder = kmalloc(sizeof(struct adv7175), GFP_KERNEL);
- if (encoder == NULL) {
- MOD_DEC_USE_COUNT;
- return -ENOMEM;
- }
- memset(encoder, 0, sizeof(struct adv7175));
- if ((device->addr == I2C_ADV7175) || (device->addr == (I2C_ADV7175 + 2))) {
- dname = adv7175_name;
- } else if ((device->addr == I2C_ADV7176) || (device->addr == (I2C_ADV7176 + 2))) {
- dname = adv7176_name;
- } else {
- // We should never get here!!!
- dname = unknown_name;
- }
- strcpy(device->name, dname);
- encoder->bus = device->bus;
- encoder->addr = device->addr;
- encoder->norm = VIDEO_MODE_PAL;
- encoder->input = 0;
- encoder->enable = 1;
- i = adv7175_write_block(encoder, init_common, sizeof(init_common));
- if (i >= 0) {
- i = adv7175_write(encoder, 0x07, TR0MODE | TR0RST);
- i = adv7175_write(encoder, 0x07, TR0MODE);
- i = adv7175_read(encoder, 0x12);
- printk(KERN_INFO "%s_attach: %s rev. %d at 0x%02xn",
- device->name, dname, i & 1, device->addr);
- }
- if (i < 0) {
- printk(KERN_ERR "%s_attach: init error %dn", device->name,
- i);
- }
- return 0;
- }
- static int adv7175_detach(struct i2c_device *device)
- {
- kfree(device->data);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static int adv7175_command(struct i2c_device *device, unsigned int cmd,
- void *arg)
- {
- struct adv7175 *encoder = device->data;
- switch (cmd) {
- case ENCODER_GET_CAPABILITIES:
- {
- struct video_encoder_capability *cap = arg;
- cap->flags = VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC
- // | VIDEO_ENCODER_SECAM
- // | VIDEO_ENCODER_CCIR
- ;
- cap->inputs = 2;
- cap->outputs = 1;
- }
- break;
- case ENCODER_SET_NORM:
- {
- int iarg = *(int *) arg;
- if (encoder->norm != iarg) {
- switch (iarg) {
- case VIDEO_MODE_NTSC:
- adv7175_write_block(encoder,
- init_ntsc,
- sizeof
- (init_ntsc));
- if (encoder->input == 0)
- adv7175_write(encoder, 0x0d, 0x4f); // Enable genlock
- adv7175_write(encoder, 0x07,
- TR0MODE | TR0RST);
- adv7175_write(encoder, 0x07,
- TR0MODE);
- break;
- case VIDEO_MODE_PAL:
- adv7175_write_block(encoder,
- init_pal,
- sizeof
- (init_pal));
- if (encoder->input == 0)
- adv7175_write(encoder, 0x0d, 0x4f); // Enable genlock
- adv7175_write(encoder, 0x07,
- TR0MODE | TR0RST);
- adv7175_write(encoder, 0x07,
- TR0MODE);
- break;
- case VIDEO_MODE_SECAM: // WARNING! ADV7176 does not support SECAM.
- // This is an attempt to convert SECAM->PAL (typically
- // it does not work due to genlock: when decoder
- // is in SECAM and encoder in in PAL the subcarrier
- // can not be syncronized with horizontal frequency)
- adv7175_write_block(encoder,
- init_pal,
- sizeof
- (init_pal));
- if (encoder->input == 0)
- adv7175_write(encoder, 0x0d, 0x49); // Disable genlock
- adv7175_write(encoder, 0x07,
- TR0MODE | TR0RST);
- adv7175_write(encoder, 0x07,
- TR0MODE);
- break;
- default:
- printk(KERN_ERR
- "%s: illegal norm: %dn",
- device->name, iarg);
- return -EINVAL;
- }
- DEBUG(printk
- (KERN_INFO "%s: switched to %sn",
- device->name, norms[iarg]));
- encoder->norm = iarg;
- }
- }
- break;
- case ENCODER_SET_INPUT:
- {
- int iarg = *(int *) arg;
- /* RJ: *iarg = 0: input is from SAA7110
- *iarg = 1: input is from ZR36060
- *iarg = 2: color bar */
- if (encoder->input != iarg) {
- switch (iarg) {
- case 0:
- adv7175_write(encoder, 0x01, 0x00);
- adv7175_write(encoder, 0x0c, TR1CAPT); /* TR1 */
- if (encoder->norm ==
- VIDEO_MODE_SECAM)
- adv7175_write(encoder, 0x0d, 0x49); // Disable genlock
- else
- adv7175_write(encoder, 0x0d, 0x4f); // Enable genlock
- adv7175_write(encoder, 0x07,
- TR0MODE | TR0RST);
- adv7175_write(encoder, 0x07,
- TR0MODE);
- //udelay(10);
- break;
- case 1:
- adv7175_write(encoder, 0x01, 0x00);
- adv7175_write(encoder, 0x0c, TR1PLAY); /* TR1 */
- adv7175_write(encoder, 0x0d, 0x49);
- adv7175_write(encoder, 0x07,
- TR0MODE | TR0RST);
- adv7175_write(encoder, 0x07,
- TR0MODE);
- //udelay(10);
- break;
- case 2:
- adv7175_write(encoder, 0x01, 0x80);
- adv7175_write(encoder, 0x0d, 0x49);
- adv7175_write(encoder, 0x07,
- TR0MODE | TR0RST);
- adv7175_write(encoder, 0x07,
- TR0MODE);
- //udelay(10);
- break;
- default:
- printk(KERN_ERR
- "%s: illegal input: %dn",
- device->name, iarg);
- return -EINVAL;
- }
- DEBUG(printk
- (KERN_INFO "%s: switched to %sn",
- device->name, inputs[iarg]));
- encoder->input = iarg;
- }
- }
- break;
- case ENCODER_SET_OUTPUT:
- {
- int *iarg = arg;
- /* not much choice of outputs */
- if (*iarg != 0) {
- return -EINVAL;
- }
- }
- break;
- case ENCODER_ENABLE_OUTPUT:
- {
- int *iarg = arg;
- encoder->enable = !!*iarg;
- adv7175_write(encoder, 0x61,
- (encoder->
- reg[0x61] & 0xbf) | (encoder->
- enable ? 0x00 :
- 0x40));
- }
- break;
- default:
- return -EINVAL;
- }
- return 0;
- }
- /* ----------------------------------------------------------------------- */
- static struct i2c_driver i2c_driver_adv7175 = {
- "adv7175", /* name */
- I2C_DRIVERID_VIDEOENCODER, /* ID */
- I2C_ADV7175, I2C_ADV7175 + 3,
- adv7175_attach,
- adv7175_detach,
- adv7175_command
- };
- static struct i2c_driver i2c_driver_adv7176 = {
- "adv7175", /* name */
- I2C_DRIVERID_VIDEOENCODER, /* ID */
- I2C_ADV7176, I2C_ADV7176 + 3,
- adv7175_attach,
- adv7175_detach,
- adv7175_command
- };
- EXPORT_NO_SYMBOLS;
- static int adv7175_init(void)
- {
- int res_adv7175 = 0, res_adv7176 = 0;
- res_adv7175 = i2c_register_driver(&i2c_driver_adv7175);
- res_adv7176 = i2c_register_driver(&i2c_driver_adv7176);
- return (res_adv7175 | res_adv7176); // Any idea how to make it better?
- }
- static void adv7175_exit(void)
- {
- i2c_unregister_driver(&i2c_driver_adv7176);
- i2c_unregister_driver(&i2c_driver_adv7175);
- }
- module_init(adv7175_init);
- module_exit(adv7175_exit);
- MODULE_LICENSE("GPL");