diff options
Diffstat (limited to 'drivers/media/i2c/saa7185.c')
| -rw-r--r-- | drivers/media/i2c/saa7185.c | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/drivers/media/i2c/saa7185.c b/drivers/media/i2c/saa7185.c new file mode 100644 index 0000000..2c6b65c --- /dev/null +++ b/drivers/media/i2c/saa7185.c @@ -0,0 +1,377 @@ +/* + * 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> + * + * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> + * - moved over to linux>=2.4.x i2c protocol (1/1/2003) + * + * 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/types.h> +#include <linux/slab.h> +#include <linux/ioctl.h> +#include <asm/uaccess.h> +#include <linux/i2c.h> +#include <linux/videodev2.h> +#include <media/v4l2-device.h> +#include <media/v4l2-chip-ident.h> + +MODULE_DESCRIPTION("Philips SAA7185 video encoder driver"); +MODULE_AUTHOR("Dave Perks"); +MODULE_LICENSE("GPL"); + +static int debug; +module_param(debug, int, 0); +MODULE_PARM_DESC(debug, "Debug level (0-1)"); + + +/* ----------------------------------------------------------------------- */ + +struct saa7185 { + struct v4l2_subdev sd; + unsigned char reg[128]; + + v4l2_std_id norm; +}; + +static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd) +{ + return container_of(sd, struct saa7185, sd); +} + +/* ----------------------------------------------------------------------- */ + +static inline int saa7185_read(struct v4l2_subdev *sd) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + + return i2c_smbus_read_byte(client); +} + +static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct saa7185 *encoder = to_saa7185(sd); + + v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value); + encoder->reg[reg] = value; + return i2c_smbus_write_byte_data(client, reg, value); +} + +static int saa7185_write_block(struct v4l2_subdev *sd, + const u8 *data, unsigned int len) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct saa7185 *encoder = to_saa7185(sd); + int ret = -1; + u8 reg; + + /* the adv7175 has an autoincrement function, use it if + * the adapter understands raw I2C */ + if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + /* do raw I2C, not smbus compatible */ + u8 block_data[32]; + int block_len; + + while (len >= 2) { + block_len = 0; + block_data[block_len++] = reg = data[0]; + do { + block_data[block_len++] = + encoder->reg[reg++] = data[1]; + len -= 2; + data += 2; + } while (len >= 2 && data[0] == reg && block_len < 32); + ret = i2c_master_send(client, block_data, block_len); + if (ret < 0) + break; + } + } else { + /* do some slow I2C emulation kind of thing */ + while (len >= 2) { + reg = *data++; + ret = saa7185_write(sd, reg, *data++); + if (ret < 0) + break; + len -= 2; + } + } + + return ret; +} + +/* ----------------------------------------------------------------------- */ + +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_init(struct v4l2_subdev *sd, u32 val) +{ + struct saa7185 *encoder = to_saa7185(sd); + + saa7185_write_block(sd, init_common, sizeof(init_common)); + if (encoder->norm & V4L2_STD_NTSC) + saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); + else + saa7185_write_block(sd, init_pal, sizeof(init_pal)); + return 0; +} + +static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) +{ + struct saa7185 *encoder = to_saa7185(sd); + + if (std & V4L2_STD_NTSC) + saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); + else if (std & V4L2_STD_PAL) + saa7185_write_block(sd, init_pal, sizeof(init_pal)); + else + return -EINVAL; + encoder->norm = std; + return 0; +} + +static int saa7185_s_routing(struct v4l2_subdev *sd, + u32 input, u32 output, u32 config) +{ + struct saa7185 *encoder = to_saa7185(sd); + + /* RJ: input = 0: input is from SA7111 + input = 1: input is from ZR36060 */ + + switch (input) { + case 0: + /* turn off colorbar */ + saa7185_write(sd, 0x3a, 0x0f); + /* Switch RTCE to 1 */ + saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08); + saa7185_write(sd, 0x6e, 0x01); + break; + + case 1: + /* turn off colorbar */ + saa7185_write(sd, 0x3a, 0x0f); + /* Switch RTCE to 0 */ + saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00); + /* SW: a slight sync problem... */ + saa7185_write(sd, 0x6e, 0x00); + break; + + case 2: + /* turn on colorbar */ + saa7185_write(sd, 0x3a, 0x8f); + /* Switch RTCE to 0 */ + saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08); + /* SW: a slight sync problem... */ + saa7185_write(sd, 0x6e, 0x01); + break; + + default: + return -EINVAL; + } + return 0; +} + +static int saa7185_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + + return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7185, 0); +} + +/* ----------------------------------------------------------------------- */ + +static const struct v4l2_subdev_core_ops saa7185_core_ops = { + .g_chip_ident = saa7185_g_chip_ident, + .init = saa7185_init, +}; + +static const struct v4l2_subdev_video_ops saa7185_video_ops = { + .s_std_output = saa7185_s_std_output, + .s_routing = saa7185_s_routing, +}; + +static const struct v4l2_subdev_ops saa7185_ops = { + .core = &saa7185_core_ops, + .video = &saa7185_video_ops, +}; + + +/* ----------------------------------------------------------------------- */ + +static int saa7185_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int i; + struct saa7185 *encoder; + struct v4l2_subdev *sd; + + /* Check if the adapter supports the needed features */ + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + v4l_info(client, "chip found @ 0x%x (%s)\n", + client->addr << 1, client->adapter->name); + + encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL); + if (encoder == NULL) + return -ENOMEM; + encoder->norm = V4L2_STD_NTSC; + sd = &encoder->sd; + v4l2_i2c_subdev_init(sd, client, &saa7185_ops); + + i = saa7185_write_block(sd, init_common, sizeof(init_common)); + if (i >= 0) + i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); + if (i < 0) + v4l2_dbg(1, debug, sd, "init error %d\n", i); + else + v4l2_dbg(1, debug, sd, "revision 0x%x\n", + saa7185_read(sd) >> 5); + return 0; +} + +static int saa7185_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct saa7185 *encoder = to_saa7185(sd); + + v4l2_device_unregister_subdev(sd); + /* SW: output off is active */ + saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40); + kfree(encoder); + return 0; +} + +/* ----------------------------------------------------------------------- */ + +static const struct i2c_device_id saa7185_id[] = { + { "saa7185", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, saa7185_id); + +static struct i2c_driver saa7185_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "saa7185", + }, + .probe = saa7185_probe, + .remove = saa7185_remove, + .id_table = saa7185_id, +}; + +module_i2c_driver(saa7185_driver); |