512 строки
12 KiB
C
512 строки
12 KiB
C
/*
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* saa7185 - Philips SAA7185B 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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*
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* Slight changes for video timing and attachment output by
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* Wolfgang Scherr <scherr@net4you.net>
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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 (1/1/2003)
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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("Philips SAA7185 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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#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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struct saa7185 {
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unsigned char reg[128];
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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_SAA7185 0x88
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/* ----------------------------------------------------------------------- */
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static inline int
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saa7185_read (struct i2c_client *client)
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{
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return i2c_smbus_read_byte(client);
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}
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static int
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saa7185_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 saa7185 *encoder = i2c_get_clientdata(client);
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dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
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encoder->reg[reg] = value;
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static int
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saa7185_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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struct saa7185 *encoder = i2c_get_clientdata(client);
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struct i2c_msg msg;
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u8 block_data[32];
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msg.addr = client->addr;
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msg.flags = 0;
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while (len >= 2) {
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msg.buf = (char *) block_data;
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msg.len = 0;
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block_data[msg.len++] = reg = data[0];
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do {
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block_data[msg.len++] =
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encoder->reg[reg++] = data[1];
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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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msg.len < 32);
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if ((ret = i2c_transfer(client->adapter,
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&msg, 1)) < 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 = saa7185_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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/* ----------------------------------------------------------------------- */
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static const unsigned char init_common[] = {
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0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1,
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* YUV2C=1, MY2C=1, MUV2C=1 */
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0x42, 0x6b, /* OVLY0=107 */
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0x43, 0x00, /* OVLU0=0 white */
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0x44, 0x00, /* OVLV0=0 */
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0x45, 0x22, /* OVLY1=34 */
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0x46, 0xac, /* OVLU1=172 yellow */
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0x47, 0x0e, /* OVLV1=14 */
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0x48, 0x03, /* OVLY2=3 */
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0x49, 0x1d, /* OVLU2=29 cyan */
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0x4a, 0xac, /* OVLV2=172 */
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0x4b, 0xf0, /* OVLY3=240 */
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0x4c, 0xc8, /* OVLU3=200 green */
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0x4d, 0xb9, /* OVLV3=185 */
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0x4e, 0xd4, /* OVLY4=212 */
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0x4f, 0x38, /* OVLU4=56 magenta */
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0x50, 0x47, /* OVLV4=71 */
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0x51, 0xc1, /* OVLY5=193 */
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0x52, 0xe3, /* OVLU5=227 red */
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0x53, 0x54, /* OVLV5=84 */
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0x54, 0xa3, /* OVLY6=163 */
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0x55, 0x54, /* OVLU6=84 blue */
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0x56, 0xf2, /* OVLV6=242 */
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0x57, 0x90, /* OVLY7=144 */
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0x58, 0x00, /* OVLU7=0 black */
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0x59, 0x00, /* OVLV7=0 */
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0x5a, 0x00, /* CHPS=0 */
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0x5b, 0x76, /* GAINU=118 */
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0x5c, 0xa5, /* GAINV=165 */
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0x5d, 0x3c, /* BLCKL=60 */
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0x5e, 0x3a, /* BLNNL=58 */
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0x5f, 0x3a, /* CCRS=0, BLNVB=58 */
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0x60, 0x00, /* NULL */
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/* 0x61 - 0x66 set according to norm */
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0x67, 0x00, /* 0 : caption 1st byte odd field */
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0x68, 0x00, /* 0 : caption 2nd byte odd field */
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0x69, 0x00, /* 0 : caption 1st byte even field */
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0x6a, 0x00, /* 0 : caption 2nd byte even field */
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0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */
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0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
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* CBLF=0, ORCV2=0, PRCV2=0 */
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0x6d, 0x00, /* SRCM1=0, CCEN=0 */
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0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at
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* least for PAL */
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0x6f, 0x00, /* HTRIG upper bits */
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0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */
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/* The following should not be needed */
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0x71, 0x15, /* BMRQ=0x115 */
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0x72, 0x90, /* EMRQ=0x690 */
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0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */
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0x74, 0x00, /* NULL */
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0x75, 0x00, /* NULL */
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0x76, 0x00, /* NULL */
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0x77, 0x15, /* BRCV=0x115 */
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0x78, 0x90, /* ERCV=0x690 */
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0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */
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/* Field length controls */
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0x7a, 0x70, /* FLC=0 */
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/* The following should not be needed if SBLN = 1 */
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0x7b, 0x16, /* FAL=22 */
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0x7c, 0x35, /* LAL=244 */
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0x7d, 0x20, /* LAL=244, FAL=22 */
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};
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static const unsigned char init_pal[] = {
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0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1,
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* YGS=1, INPI=0, DOWN=0 */
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0x62, 0xc8, /* DECTYP=1, BSTA=72 */
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0x63, 0xcb, /* FSC0 */
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0x64, 0x8a, /* FSC1 */
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0x65, 0x09, /* FSC2 */
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0x66, 0x2a, /* FSC3 */
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};
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static const unsigned char init_ntsc[] = {
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0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1,
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* YGS=1, INPI=0, DOWN=0 */
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0x62, 0xe6, /* DECTYP=1, BSTA=102 */
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0x63, 0x1f, /* FSC0 */
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0x64, 0x7c, /* FSC1 */
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0x65, 0xf0, /* FSC2 */
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0x66, 0x21, /* FSC3 */
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};
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static int
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saa7185_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 saa7185 *encoder = i2c_get_clientdata(client);
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switch (cmd) {
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case 0:
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saa7185_write_block(client, init_common,
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sizeof(init_common));
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switch (encoder->norm) {
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case VIDEO_MODE_NTSC:
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saa7185_write_block(client, init_ntsc,
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sizeof(init_ntsc));
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break;
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case VIDEO_MODE_PAL:
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saa7185_write_block(client, init_pal,
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sizeof(init_pal));
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break;
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}
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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 =
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VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
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VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
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cap->inputs = 1;
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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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//saa7185_write_block(client, init_common, sizeof(init_common));
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switch (*iarg) {
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case VIDEO_MODE_NTSC:
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saa7185_write_block(client, init_ntsc,
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sizeof(init_ntsc));
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break;
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case VIDEO_MODE_PAL:
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saa7185_write_block(client, init_pal,
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sizeof(init_pal));
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break;
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case VIDEO_MODE_SECAM:
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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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}
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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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/* RJ: *iarg = 0: input is from SA7111
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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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/* Switch RTCE to 1 */
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saa7185_write(client, 0x61,
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(encoder->reg[0x61] & 0xf7) | 0x08);
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saa7185_write(client, 0x6e, 0x01);
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break;
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case 1:
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/* Switch RTCE to 0 */
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saa7185_write(client, 0x61,
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(encoder->reg[0x61] & 0xf7) | 0x00);
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/* SW: a slight sync problem... */
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saa7185_write(client, 0x6e, 0x00);
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break;
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default:
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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_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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saa7185_write(client, 0x61,
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(encoder->reg[0x61] & 0xbf) |
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(encoder->enable ? 0x00 : 0x40));
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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_SAA7185 >> 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_saa7185;
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static int
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saa7185_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 saa7185 *encoder;
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dprintk(1,
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KERN_INFO
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"saa7185.c: detecting saa7185 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_saa7185;
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strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
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encoder = kzalloc(sizeof(struct saa7185), 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_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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i = saa7185_write_block(client, init_common, sizeof(init_common));
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if (i >= 0) {
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i = saa7185_write_block(client, init_ntsc,
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sizeof(init_ntsc));
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}
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if (i < 0) {
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dprintk(1, KERN_ERR "%s_attach: init error %d\n",
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I2C_NAME(client), i);
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} else {
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dprintk(1,
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KERN_INFO
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"%s_attach: chip version %d at address 0x%x\n",
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I2C_NAME(client), saa7185_read(client) >> 5,
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client->addr << 1);
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}
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return 0;
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}
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static int
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saa7185_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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"saa7185.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, &saa7185_detect_client);
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}
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static int
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saa7185_detach_client (struct i2c_client *client)
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{
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struct saa7185 *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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saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40); /* SW: output off is active */
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//saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
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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_saa7185 = {
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.driver = {
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.name = "saa7185", /* name */
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},
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.id = I2C_DRIVERID_SAA7185B,
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.attach_adapter = saa7185_attach_adapter,
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.detach_client = saa7185_detach_client,
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.command = saa7185_command,
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};
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static int __init
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saa7185_init (void)
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{
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return i2c_add_driver(&i2c_driver_saa7185);
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}
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static void __exit
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saa7185_exit (void)
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{
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i2c_del_driver(&i2c_driver_saa7185);
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}
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module_init(saa7185_init);
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module_exit(saa7185_exit);
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