saa7185.c
上传用户:lgb322
上传日期:2013-02-24
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文件大小:9k
- /*
- saa7185 - Philips SAA7185B video encoder driver version 0.0.3
- Copyright (C) 1998 Dave Perks <dperks@ibm.net>
- Slight changes for video timing and attachment output by
- Wolfgang Scherr <scherr@net4you.net>
-
- 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>
- #define DEBUG(x) /* Debug driver */
- /* ----------------------------------------------------------------------- */
- struct saa7185 {
- struct i2c_bus *bus;
- int addr;
- unsigned char reg[128];
- int norm;
- int enable;
- int bright;
- int contrast;
- int hue;
- int sat;
- };
- #define I2C_SAA7185 0x88
- #define I2C_DELAY 10
- /* ----------------------------------------------------------------------- */
- static int saa7185_read(struct saa7185 *dev)
- {
- int ack;
- LOCK_I2C_BUS(dev->bus);
- i2c_start(dev->bus);
- i2c_sendbyte(dev->bus, dev->addr | 1, I2C_DELAY);
- ack = i2c_readbyte(dev->bus, 1);
- i2c_stop(dev->bus);
- UNLOCK_I2C_BUS(dev->bus);
- return ack;
- }
- static int saa7185_write(struct saa7185 *dev, unsigned char subaddr,
- unsigned char data)
- {
- int ack;
- DEBUG(printk
- (KERN_DEBUG "SAA7185: %02x set to %02xn", subaddr, 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);
- ack = i2c_sendbyte(dev->bus, data, I2C_DELAY);
- dev->reg[subaddr] = data;
- i2c_stop(dev->bus);
- UNLOCK_I2C_BUS(dev->bus);
- return ack;
- }
- static int saa7185_write_block(struct saa7185 *dev,
- unsigned const char *data, unsigned int len)
- {
- int ack = -1;
- 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;
- }
- /* ----------------------------------------------------------------------- */
- static const unsigned char init_common[] = {
- 0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1, YUV2C=1, MY2C=1, MUV2C=1 */
- 0x42, 0x6b, /* OVLY0=107 */
- 0x43, 0x00, /* OVLU0=0 white */
- 0x44, 0x00, /* OVLV0=0 */
- 0x45, 0x22, /* OVLY1=34 */
- 0x46, 0xac, /* OVLU1=172 yellow */
- 0x47, 0x0e, /* OVLV1=14 */
- 0x48, 0x03, /* OVLY2=3 */
- 0x49, 0x1d, /* OVLU2=29 cyan */
- 0x4a, 0xac, /* OVLV2=172 */
- 0x4b, 0xf0, /* OVLY3=240 */
- 0x4c, 0xc8, /* OVLU3=200 green */
- 0x4d, 0xb9, /* OVLV3=185 */
- 0x4e, 0xd4, /* OVLY4=212 */
- 0x4f, 0x38, /* OVLU4=56 magenta */
- 0x50, 0x47, /* OVLV4=71 */
- 0x51, 0xc1, /* OVLY5=193 */
- 0x52, 0xe3, /* OVLU5=227 red */
- 0x53, 0x54, /* OVLV5=84 */
- 0x54, 0xa3, /* OVLY6=163 */
- 0x55, 0x54, /* OVLU6=84 blue */
- 0x56, 0xf2, /* OVLV6=242 */
- 0x57, 0x90, /* OVLY7=144 */
- 0x58, 0x00, /* OVLU7=0 black */
- 0x59, 0x00, /* OVLV7=0 */
- 0x5a, 0x00, /* CHPS=0 */
- 0x5b, 0x76, /* GAINU=118 */
- 0x5c, 0xa5, /* GAINV=165 */
- 0x5d, 0x3c, /* BLCKL=60 */
- 0x5e, 0x3a, /* BLNNL=58 */
- 0x5f, 0x3a, /* CCRS=0, BLNVB=58 */
- 0x60, 0x00, /* NULL */
- /* 0x61 - 0x66 set according to norm */
- 0x67, 0x00, /* 0 : caption 1st byte odd field */
- 0x68, 0x00, /* 0 : caption 2nd byte odd field */
- 0x69, 0x00, /* 0 : caption 1st byte even field */
- 0x6a, 0x00, /* 0 : caption 2nd byte even field */
- 0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */
- 0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0, CBLF=0, ORCV2=0, PRCV2=0 */
- 0x6d, 0x00, /* SRCM1=0, CCEN=0 */
- 0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at least for PAL */
- 0x6f, 0x00, /* HTRIG upper bits */
- 0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */
- /* The following should not be needed */
- 0x71, 0x15, /* BMRQ=0x115 */
- 0x72, 0x90, /* EMRQ=0x690 */
- 0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */
- 0x74, 0x00, /* NULL */
- 0x75, 0x00, /* NULL */
- 0x76, 0x00, /* NULL */
- 0x77, 0x15, /* BRCV=0x115 */
- 0x78, 0x90, /* ERCV=0x690 */
- 0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */
- /* Field length controls */
- 0x7a, 0x70, /* FLC=0 */
- /* The following should not be needed if SBLN = 1 */
- 0x7b, 0x16, /* FAL=22 */
- 0x7c, 0x35, /* LAL=244 */
- 0x7d, 0x20, /* LAL=244, FAL=22 */
- };
- static const unsigned char init_pal[] = {
- 0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1, YGS=1, INPI=0, DOWN=0 */
- 0x62, 0xc8, /* DECTYP=1, BSTA=72 */
- 0x63, 0xcb, /* FSC0 */
- 0x64, 0x8a, /* FSC1 */
- 0x65, 0x09, /* FSC2 */
- 0x66, 0x2a, /* FSC3 */
- };
- static const unsigned char init_ntsc[] = {
- 0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1, YGS=1, INPI=0, DOWN=0 */
- 0x62, 0xe6, /* DECTYP=1, BSTA=102 */
- 0x63, 0x1f, /* FSC0 */
- 0x64, 0x7c, /* FSC1 */
- 0x65, 0xf0, /* FSC2 */
- 0x66, 0x21, /* FSC3 */
- };
- static int saa7185_attach(struct i2c_device *device)
- {
- int i;
- struct saa7185 *encoder;
- MOD_INC_USE_COUNT;
-
- device->data = encoder = kmalloc(sizeof(struct saa7185), GFP_KERNEL);
- if (encoder == NULL) {
- MOD_DEC_USE_COUNT;
- return -ENOMEM;
- }
- memset(encoder, 0, sizeof(struct saa7185));
- strcpy(device->name, "saa7185");
- encoder->bus = device->bus;
- encoder->addr = device->addr;
- encoder->norm = VIDEO_MODE_NTSC;
- encoder->enable = 1;
- i = saa7185_write_block(encoder, init_common, sizeof(init_common));
- if (i >= 0) {
- i = saa7185_write_block(encoder, init_ntsc,
- sizeof(init_ntsc));
- }
- if (i < 0) {
- printk(KERN_ERR "%s_attach: init error %dn", device->name,
- i);
- } else {
- printk(KERN_INFO "%s_attach: chip version %dn",
- device->name, saa7185_read(encoder) >> 5);
- }
- return 0;
- }
- static int saa7185_detach(struct i2c_device *device)
- {
- struct saa7185 *encoder = device->data;
- saa7185_write(encoder, 0x61, (encoder->reg[0x61]) | 0x40); /* SW: output off is active */
- //saa7185_write(encoder, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
- kfree(encoder);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static int saa7185_command(struct i2c_device *device, unsigned int cmd,
- void *arg)
- {
- struct saa7185 *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 = 1;
- cap->outputs = 1;
- }
- break;
- case ENCODER_SET_NORM:
- {
- int *iarg = arg;
- switch (*iarg) {
- case VIDEO_MODE_NTSC:
- saa7185_write_block(encoder, init_ntsc,
- sizeof(init_ntsc));
- break;
- case VIDEO_MODE_PAL:
- saa7185_write_block(encoder, init_pal,
- sizeof(init_pal));
- break;
- case VIDEO_MODE_SECAM:
- default:
- return -EINVAL;
- }
- encoder->norm = *iarg;
- }
- break;
- case ENCODER_SET_INPUT:
- {
- int *iarg = arg;
- /* RJ: *iarg = 0: input is from SA7111
- *iarg = 1: input is from ZR36060 */
- switch (*iarg) {
- case 0:
- /* Switch RTCE to 1 */
- saa7185_write(encoder, 0x61,
- (encoder->
- reg[0x61] & 0xf7) | 0x08);
- saa7185_write(encoder, 0x6e, 0x01);
- break;
- case 1:
- /* Switch RTCE to 0 */
- saa7185_write(encoder, 0x61,
- (encoder->
- reg[0x61] & 0xf7) | 0x00);
- /* SW: a slight sync problem... */
- saa7185_write(encoder, 0x6e, 0x00);
- break;
- default:
- return -EINVAL;
- }
- }
- 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;
- saa7185_write(encoder, 0x61,
- (encoder->
- reg[0x61] & 0xbf) | (encoder->
- enable ? 0x00 :
- 0x40));
- }
- break;
- default:
- return -EINVAL;
- }
- return 0;
- }
- /* ----------------------------------------------------------------------- */
- static struct i2c_driver i2c_driver_saa7185 = {
- "saa7185", /* name */
- I2C_DRIVERID_VIDEOENCODER, /* ID */
- I2C_SAA7185, I2C_SAA7185 + 1,
- saa7185_attach,
- saa7185_detach,
- saa7185_command
- };
- EXPORT_NO_SYMBOLS;
- static int saa7185_init(void)
- {
- return i2c_register_driver(&i2c_driver_saa7185);
- }
- static void saa7185_exit(void)
- {
- i2c_unregister_driver(&i2c_driver_saa7185);
- }
- module_init(saa7185_init);
- module_exit(saa7185_exit);
- MODULE_LICENSE("GPL");