diff options
Diffstat (limited to 'drivers/media/video/saa7191.c')
| -rw-r--r-- | drivers/media/video/saa7191.c | 512 |
1 files changed, 512 insertions, 0 deletions
diff --git a/drivers/media/video/saa7191.c b/drivers/media/video/saa7191.c new file mode 100644 index 0000000..454f5c1 --- /dev/null +++ b/drivers/media/video/saa7191.c @@ -0,0 +1,512 @@ +/* + * saa7191.c - Philips SAA7191 video decoder driver + * + * Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org> + * Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#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/sched.h> + +#include <linux/videodev.h> +#include <linux/video_decoder.h> +#include <linux/i2c.h> + +#include "saa7191.h" + +#define SAA7191_MODULE_VERSION "0.0.3" + +MODULE_DESCRIPTION("Philips SAA7191 video decoder driver"); +MODULE_VERSION(SAA7191_MODULE_VERSION); +MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>"); +MODULE_LICENSE("GPL"); + +#define VINO_ADAPTER (I2C_ALGO_SGI | I2C_HW_SGI_VINO) + +struct saa7191 { + struct i2c_client *client; + + /* the register values are stored here as the actual + * I2C-registers are write-only */ + unsigned char reg[25]; + + unsigned char norm; + unsigned char input; +}; + +static struct i2c_driver i2c_driver_saa7191; + +static const unsigned char initseq[] = { + 0, /* Subaddress */ + 0x50, /* SAA7191_REG_IDEL */ + 0x30, /* SAA7191_REG_HSYB */ + 0x00, /* SAA7191_REG_HSYS */ + 0xe8, /* SAA7191_REG_HCLB */ + 0xb6, /* SAA7191_REG_HCLS */ + 0xf4, /* SAA7191_REG_HPHI */ + 0x01, /* SAA7191_REG_LUMA - chrominance trap active (CVBS) */ + 0x00, /* SAA7191_REG_HUEC */ + 0xf8, /* SAA7191_REG_CKTQ */ + 0xf8, /* SAA7191_REG_CKTS */ + 0x90, /* SAA7191_REG_PLSE */ + 0x90, /* SAA7191_REG_SESE */ + 0x00, /* SAA7191_REG_GAIN */ + 0x0c, /* SAA7191_REG_STDC - not SECAM, slow time constant */ + 0x78, /* SAA7191_REG_IOCK - chrominance from CVBS, GPSW1 & 2 off */ + 0x99, /* SAA7191_REG_CTL3 - automatic field detection */ + 0x00, /* SAA7191_REG_CTL4 */ + 0x2c, /* SAA7191_REG_CHCV */ + 0x00, /* unused */ + 0x00, /* unused */ + 0x34, /* SAA7191_REG_HS6B */ + 0x0a, /* SAA7191_REG_HS6S */ + 0xf4, /* SAA7191_REG_HC6B */ + 0xce, /* SAA7191_REG_HC6S */ + 0xf4, /* SAA7191_REG_HP6I */ +}; + +/* SAA7191 register handling */ + +static unsigned char saa7191_read_reg(struct i2c_client *client, + unsigned char reg) +{ + return ((struct saa7191 *)i2c_get_clientdata(client))->reg[reg]; +} + +static int saa7191_read_status(struct i2c_client *client, + unsigned char *value) +{ + int ret; + + ret = i2c_master_recv(client, value, 1); + if (ret < 0) { + printk(KERN_ERR "SAA7191: saa7191_read_status(): read failed"); + return ret; + } + + return 0; +} + + +static int saa7191_write_reg(struct i2c_client *client, unsigned char reg, + unsigned char value) +{ + + ((struct saa7191 *)i2c_get_clientdata(client))->reg[reg] = value; + return i2c_smbus_write_byte_data(client, reg, value); +} + +/* the first byte of data must be the first subaddress number (register) */ +static int saa7191_write_block(struct i2c_client *client, + unsigned char length, unsigned char *data) +{ + int i; + int ret; + + struct saa7191 *decoder = (struct saa7191 *)i2c_get_clientdata(client); + for (i = 0; i < (length - 1); i++) { + decoder->reg[data[0] + i] = data[i + 1]; + } + + ret = i2c_master_send(client, data, length); + if (ret < 0) { + printk(KERN_ERR "SAA7191: saa7191_write_block(): " + "write failed"); + return ret; + } + + return 0; +} + +/* Helper functions */ + +static int saa7191_set_input(struct i2c_client *client, int input) +{ + unsigned char luma = saa7191_read_reg(client, SAA7191_REG_LUMA); + unsigned char iock = saa7191_read_reg(client, SAA7191_REG_IOCK); + int err; + + switch (input) { + case SAA7191_INPUT_COMPOSITE: /* Set Composite input */ + iock &= ~(SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW1 + | SAA7191_IOCK_GPSW2); + /* Chrominance trap active */ + luma &= ~SAA7191_LUMA_BYPS; + break; + case SAA7191_INPUT_SVIDEO: /* Set S-Video input */ + iock |= SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW2; + /* Chrominance trap bypassed */ + luma |= SAA7191_LUMA_BYPS; + break; + default: + return -EINVAL; + } + + err = saa7191_write_reg(client, SAA7191_REG_LUMA, luma); + if (err) + return -EIO; + err = saa7191_write_reg(client, SAA7191_REG_IOCK, iock); + if (err) + return -EIO; + + return 0; +} + +static int saa7191_set_norm(struct i2c_client *client, int norm) +{ + struct saa7191 *decoder = i2c_get_clientdata(client); + unsigned char stdc = saa7191_read_reg(client, SAA7191_REG_STDC); + unsigned char ctl3 = saa7191_read_reg(client, SAA7191_REG_CTL3); + unsigned char chcv = saa7191_read_reg(client, SAA7191_REG_CHCV); + int err; + + switch(norm) { + case SAA7191_NORM_AUTO: { + unsigned char status; + + // does status depend on current norm ? + if (saa7191_read_status(client, &status)) + return -EIO; + + stdc &= ~SAA7191_STDC_SECS; + ctl3 &= ~SAA7191_CTL3_FSEL; + ctl3 |= SAA7191_CTL3_AUFD; + chcv = (status & SAA7191_STATUS_FIDT) + ? SAA7191_CHCV_NTSC : SAA7191_CHCV_PAL; + break; + } + case SAA7191_NORM_PAL: + stdc &= ~SAA7191_STDC_SECS; + ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL); + chcv = SAA7191_CHCV_PAL; + break; + case SAA7191_NORM_NTSC: + stdc &= ~SAA7191_STDC_SECS; + ctl3 &= ~SAA7191_CTL3_AUFD; + ctl3 |= SAA7191_CTL3_FSEL; + chcv = SAA7191_CHCV_NTSC; + break; + case SAA7191_NORM_SECAM: + stdc |= SAA7191_STDC_SECS; + ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL); + chcv = SAA7191_CHCV_PAL; + break; + default: + return -EINVAL; + } + + err = saa7191_write_reg(client, SAA7191_REG_CTL3, ctl3); + if (err) + return -EIO; + err = saa7191_write_reg(client, SAA7191_REG_STDC, stdc); + if (err) + return -EIO; + err = saa7191_write_reg(client, SAA7191_REG_CHCV, chcv); + if (err) + return -EIO; + + decoder->norm = norm; + + return 0; +} + +static int saa7191_get_controls(struct i2c_client *client, + struct saa7191_control *ctrl) +{ + unsigned char hue = saa7191_read_reg(client, SAA7191_REG_HUEC); + unsigned char stdc = saa7191_read_reg(client, SAA7191_REG_STDC); + + if (hue < 0x80) { + hue += 0x80; + } else { + hue -= 0x80; + } + ctrl->hue = hue; + + ctrl->vtrc = (stdc & SAA7191_STDC_VTRC) + ? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED; + + return 0; +} + +static int saa7191_set_controls(struct i2c_client *client, + struct saa7191_control *ctrl) +{ + int err; + + if (ctrl->hue >= 0) { + unsigned char hue = ctrl->hue & 0xff; + if (hue < 0x80) { + hue += 0x80; + } else { + hue -= 0x80; + } + err = saa7191_write_reg(client, SAA7191_REG_HUEC, hue); + if (err) + return -EIO; + } + if (ctrl->vtrc >= 0) { + unsigned char stdc = + saa7191_read_reg(client, SAA7191_REG_STDC); + + if (ctrl->vtrc) { + stdc |= SAA7191_STDC_VTRC; + } else { + stdc &= ~SAA7191_STDC_VTRC; + } + + err = saa7191_write_reg(client, SAA7191_REG_STDC, stdc); + if (err) + return -EIO; + } + + return 0; +} + +/* I2C-interface */ + +static int saa7191_attach(struct i2c_adapter *adap, int addr, int kind) +{ + int err = 0; + struct saa7191 *decoder; + struct i2c_client *client; + + printk(KERN_INFO "Philips SAA7191 driver version %s\n", + SAA7191_MODULE_VERSION); + + client = kmalloc(sizeof(*client), GFP_KERNEL); + if (!client) + return -ENOMEM; + decoder = kmalloc(sizeof(*decoder), GFP_KERNEL); + if (!decoder) { + err = -ENOMEM; + goto out_free_client; + } + + memset(client, 0, sizeof(struct i2c_client)); + memset(decoder, 0, sizeof(struct saa7191)); + + client->addr = addr; + client->adapter = adap; + client->driver = &i2c_driver_saa7191; + client->flags = 0; + strcpy(client->name, "saa7191 client"); + i2c_set_clientdata(client, decoder); + + decoder->client = client; + + err = i2c_attach_client(client); + if (err) + goto out_free_decoder; + + decoder->input = SAA7191_INPUT_COMPOSITE; + decoder->norm = SAA7191_NORM_AUTO; + + err = saa7191_write_block(client, sizeof(initseq), + (unsigned char *)initseq); + if (err) { + printk(KERN_ERR "SAA7191 initialization failed\n"); + goto out_detach_client; + } + + printk(KERN_INFO "SAA7191 initialized\n"); + + return 0; + +out_detach_client: + i2c_detach_client(client); +out_free_decoder: + kfree(decoder); +out_free_client: + kfree(client); + return err; +} + +static int saa7191_probe(struct i2c_adapter *adap) +{ + /* Always connected to VINO */ + if (adap->id == VINO_ADAPTER) + return saa7191_attach(adap, SAA7191_ADDR, 0); + /* Feel free to add probe here :-) */ + return -ENODEV; +} + +static int saa7191_detach(struct i2c_client *client) +{ + struct saa7191 *decoder = i2c_get_clientdata(client); + + i2c_detach_client(client); + kfree(decoder); + kfree(client); + return 0; +} + +static int saa7191_command(struct i2c_client *client, unsigned int cmd, + void *arg) +{ + struct saa7191 *decoder = i2c_get_clientdata(client); + + switch (cmd) { + case DECODER_GET_CAPABILITIES: { + struct video_decoder_capability *cap = arg; + + cap->flags = VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC | + VIDEO_DECODER_SECAM | VIDEO_DECODER_AUTO; + cap->inputs = (client->adapter->id == VINO_ADAPTER) ? 2 : 1; + cap->outputs = 1; + break; + } + case DECODER_GET_STATUS: { + int *iarg = arg; + unsigned char status; + int res = 0; + + if (saa7191_read_status(client, &status)) { + return -EIO; + } + if ((status & SAA7191_STATUS_HLCK) == 0) + res |= DECODER_STATUS_GOOD; + if (status & SAA7191_STATUS_CODE) + res |= DECODER_STATUS_COLOR; + switch (decoder->norm) { + case SAA7191_NORM_NTSC: + res |= DECODER_STATUS_NTSC; + break; + case SAA7191_NORM_PAL: + res |= DECODER_STATUS_PAL; + break; + case SAA7191_NORM_SECAM: + res |= DECODER_STATUS_SECAM; + break; + case SAA7191_NORM_AUTO: + default: + if (status & SAA7191_STATUS_FIDT) + res |= DECODER_STATUS_NTSC; + else + res |= DECODER_STATUS_PAL; + break; + } + *iarg = res; + break; + } + case DECODER_SET_NORM: { + int *iarg = arg; + + switch (*iarg) { + case VIDEO_MODE_AUTO: + return saa7191_set_norm(client, SAA7191_NORM_AUTO); + case VIDEO_MODE_PAL: + return saa7191_set_norm(client, SAA7191_NORM_PAL); + case VIDEO_MODE_NTSC: + return saa7191_set_norm(client, SAA7191_NORM_NTSC); + case VIDEO_MODE_SECAM: + return saa7191_set_norm(client, SAA7191_NORM_SECAM); + default: + return -EINVAL; + } + break; + } + case DECODER_SET_INPUT: { + int *iarg = arg; + + switch (client->adapter->id) { + case VINO_ADAPTER: + return saa7191_set_input(client, *iarg); + default: + if (*iarg != 0) + return -EINVAL; + } + break; + } + case DECODER_SET_OUTPUT: { + int *iarg = arg; + + /* not much choice of outputs */ + if (*iarg != 0) + return -EINVAL; + break; + } + case DECODER_ENABLE_OUTPUT: { + /* Always enabled */ + break; + } + case DECODER_SET_PICTURE: { + struct video_picture *pic = arg; + unsigned val; + int err; + + val = (pic->hue >> 8) - 0x80; + err = saa7191_write_reg(client, SAA7191_REG_HUEC, val); + if (err) + return -EIO; + break; + } + case DECODER_SAA7191_GET_STATUS: { + struct saa7191_status *status = arg; + unsigned char status_reg; + + if (saa7191_read_status(client, &status_reg)) + return -EIO; + status->signal = ((status_reg & SAA7191_STATUS_HLCK) == 0) + ? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED; + status->ntsc = (status_reg & SAA7191_STATUS_FIDT) + ? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED; + status->color = (status_reg & SAA7191_STATUS_CODE) + ? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED; + + status->input = decoder->input; + status->norm = decoder->norm; + } + case DECODER_SAA7191_SET_NORM: { + int *norm = arg; + return saa7191_set_norm(client, *norm); + } + case DECODER_SAA7191_GET_CONTROLS: { + struct saa7191_control *ctrl = arg; + return saa7191_get_controls(client, ctrl); + } + case DECODER_SAA7191_SET_CONTROLS: { + struct saa7191_control *ctrl = arg; + return saa7191_set_controls(client, ctrl); + } + default: + return -EINVAL; + } + + return 0; +} + +static struct i2c_driver i2c_driver_saa7191 = { + .owner = THIS_MODULE, + .name = "saa7191", + .id = I2C_DRIVERID_SAA7191, + .flags = I2C_DF_NOTIFY, + .attach_adapter = saa7191_probe, + .detach_client = saa7191_detach, + .command = saa7191_command +}; + +static int saa7191_init(void) +{ + return i2c_add_driver(&i2c_driver_saa7191); +} + +static void saa7191_exit(void) +{ + i2c_del_driver(&i2c_driver_saa7191); +} + +module_init(saa7191_init); +module_exit(saa7191_exit); |
