diff options
Diffstat (limited to 'drivers/media/i2c/adv7175.c')
| -rw-r--r-- | drivers/media/i2c/adv7175.c | 461 |
1 files changed, 461 insertions, 0 deletions
diff --git a/drivers/media/i2c/adv7175.c b/drivers/media/i2c/adv7175.c new file mode 100644 index 000000000..e31e8d909 --- /dev/null +++ b/drivers/media/i2c/adv7175.c @@ -0,0 +1,461 @@ +/* + * 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. + * + * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> + * - moved over to linux>=2.4.x i2c protocol (9/9/2002) + * + * 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. + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/ioctl.h> +#include <linux/uaccess.h> +#include <linux/i2c.h> +#include <linux/videodev2.h> +#include <media/v4l2-device.h> + +MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver"); +MODULE_AUTHOR("Dave Perks"); +MODULE_LICENSE("GPL"); + +#define I2C_ADV7175 0xd4 +#define I2C_ADV7176 0x54 + + +static int debug; +module_param(debug, int, 0); +MODULE_PARM_DESC(debug, "Debug level (0-1)"); + +/* ----------------------------------------------------------------------- */ + +struct adv7175 { + struct v4l2_subdev sd; + v4l2_std_id norm; + int input; +}; + +static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd) +{ + return container_of(sd, struct adv7175, sd); +} + +static char *inputs[] = { "pass_through", "play_back", "color_bar" }; + +static u32 adv7175_codes[] = { + MEDIA_BUS_FMT_UYVY8_2X8, + MEDIA_BUS_FMT_UYVY8_1X16, +}; + +/* ----------------------------------------------------------------------- */ + +static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + + return i2c_smbus_write_byte_data(client, reg, value); +} + +static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + + return i2c_smbus_read_byte_data(client, reg); +} + +static int adv7175_write_block(struct v4l2_subdev *sd, + const u8 *data, unsigned int len) +{ + struct i2c_client *client = v4l2_get_subdevdata(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++] = data[1]; + reg++; + 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 = adv7175_write(sd, reg, *data++); + if (ret < 0) + break; + len -= 2; + } + } + + return ret; +} + +static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through) +{ + /* for some reason pass_through NTSC needs + * a different sub-carrier freq to remain stable. */ + if (pass_through) + adv7175_write(sd, 0x02, 0x00); + else + adv7175_write(sd, 0x02, 0x55); + + adv7175_write(sd, 0x03, 0x55); + adv7175_write(sd, 0x04, 0x55); + adv7175_write(sd, 0x05, 0x25); +} + +/* ----------------------------------------------------------------------- */ +/* 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, /* */ +}; + +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_init(struct v4l2_subdev *sd, u32 val) +{ + /* This is just for testing!!! */ + adv7175_write_block(sd, init_common, sizeof(init_common)); + adv7175_write(sd, 0x07, TR0MODE | TR0RST); + adv7175_write(sd, 0x07, TR0MODE); + return 0; +} + +static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) +{ + struct adv7175 *encoder = to_adv7175(sd); + + if (std & V4L2_STD_NTSC) { + adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc)); + if (encoder->input == 0) + adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */ + adv7175_write(sd, 0x07, TR0MODE | TR0RST); + adv7175_write(sd, 0x07, TR0MODE); + } else if (std & V4L2_STD_PAL) { + adv7175_write_block(sd, init_pal, sizeof(init_pal)); + if (encoder->input == 0) + adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */ + adv7175_write(sd, 0x07, TR0MODE | TR0RST); + adv7175_write(sd, 0x07, TR0MODE); + } else if (std & V4L2_STD_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 + * quency) */ + adv7175_write_block(sd, init_pal, sizeof(init_pal)); + if (encoder->input == 0) + adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */ + adv7175_write(sd, 0x07, TR0MODE | TR0RST); + adv7175_write(sd, 0x07, TR0MODE); + } else { + v4l2_dbg(1, debug, sd, "illegal norm: %llx\n", + (unsigned long long)std); + return -EINVAL; + } + v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std); + encoder->norm = std; + return 0; +} + +static int adv7175_s_routing(struct v4l2_subdev *sd, + u32 input, u32 output, u32 config) +{ + struct adv7175 *encoder = to_adv7175(sd); + + /* RJ: input = 0: input is from decoder + input = 1: input is from ZR36060 + input = 2: color bar */ + + switch (input) { + case 0: + adv7175_write(sd, 0x01, 0x00); + + if (encoder->norm & V4L2_STD_NTSC) + set_subcarrier_freq(sd, 1); + + adv7175_write(sd, 0x0c, TR1CAPT); /* TR1 */ + if (encoder->norm & V4L2_STD_SECAM) + adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */ + else + adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */ + adv7175_write(sd, 0x07, TR0MODE | TR0RST); + adv7175_write(sd, 0x07, TR0MODE); + /*udelay(10);*/ + break; + + case 1: + adv7175_write(sd, 0x01, 0x00); + + if (encoder->norm & V4L2_STD_NTSC) + set_subcarrier_freq(sd, 0); + + adv7175_write(sd, 0x0c, TR1PLAY); /* TR1 */ + adv7175_write(sd, 0x0d, 0x49); + adv7175_write(sd, 0x07, TR0MODE | TR0RST); + adv7175_write(sd, 0x07, TR0MODE); + /* udelay(10); */ + break; + + case 2: + adv7175_write(sd, 0x01, 0x80); + + if (encoder->norm & V4L2_STD_NTSC) + set_subcarrier_freq(sd, 0); + + adv7175_write(sd, 0x0d, 0x49); + adv7175_write(sd, 0x07, TR0MODE | TR0RST); + adv7175_write(sd, 0x07, TR0MODE); + /* udelay(10); */ + break; + + default: + v4l2_dbg(1, debug, sd, "illegal input: %d\n", input); + return -EINVAL; + } + v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]); + encoder->input = input; + return 0; +} + +static int adv7175_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (code->pad || code->index >= ARRAY_SIZE(adv7175_codes)) + return -EINVAL; + + code->code = adv7175_codes[code->index]; + return 0; +} + +static int adv7175_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *format) +{ + struct v4l2_mbus_framefmt *mf = &format->format; + u8 val = adv7175_read(sd, 0x7); + + if (format->pad) + return -EINVAL; + + if ((val & 0x40) == (1 << 6)) + mf->code = MEDIA_BUS_FMT_UYVY8_1X16; + else + mf->code = MEDIA_BUS_FMT_UYVY8_2X8; + + mf->colorspace = V4L2_COLORSPACE_SMPTE170M; + mf->width = 0; + mf->height = 0; + mf->field = V4L2_FIELD_ANY; + + return 0; +} + +static int adv7175_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *format) +{ + struct v4l2_mbus_framefmt *mf = &format->format; + u8 val = adv7175_read(sd, 0x7); + int ret = 0; + + if (format->pad) + return -EINVAL; + + switch (mf->code) { + case MEDIA_BUS_FMT_UYVY8_2X8: + val &= ~0x40; + break; + + case MEDIA_BUS_FMT_UYVY8_1X16: + val |= 0x40; + break; + + default: + v4l2_dbg(1, debug, sd, + "illegal v4l2_mbus_framefmt code: %d\n", mf->code); + return -EINVAL; + } + + if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) + ret = adv7175_write(sd, 0x7, val); + + return ret; +} + +static int adv7175_s_power(struct v4l2_subdev *sd, int on) +{ + if (on) + adv7175_write(sd, 0x01, 0x00); + else + adv7175_write(sd, 0x01, 0x78); + + return 0; +} + +/* ----------------------------------------------------------------------- */ + +static const struct v4l2_subdev_core_ops adv7175_core_ops = { + .init = adv7175_init, + .s_power = adv7175_s_power, +}; + +static const struct v4l2_subdev_video_ops adv7175_video_ops = { + .s_std_output = adv7175_s_std_output, + .s_routing = adv7175_s_routing, +}; + +static const struct v4l2_subdev_pad_ops adv7175_pad_ops = { + .enum_mbus_code = adv7175_enum_mbus_code, + .get_fmt = adv7175_get_fmt, + .set_fmt = adv7175_set_fmt, +}; + +static const struct v4l2_subdev_ops adv7175_ops = { + .core = &adv7175_core_ops, + .video = &adv7175_video_ops, + .pad = &adv7175_pad_ops, +}; + +/* ----------------------------------------------------------------------- */ + +static int adv7175_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int i; + struct adv7175 *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 = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL); + if (encoder == NULL) + return -ENOMEM; + sd = &encoder->sd; + v4l2_i2c_subdev_init(sd, client, &adv7175_ops); + encoder->norm = V4L2_STD_NTSC; + encoder->input = 0; + + i = adv7175_write_block(sd, init_common, sizeof(init_common)); + if (i >= 0) { + i = adv7175_write(sd, 0x07, TR0MODE | TR0RST); + i = adv7175_write(sd, 0x07, TR0MODE); + i = adv7175_read(sd, 0x12); + v4l2_dbg(1, debug, sd, "revision %d\n", i & 1); + } + if (i < 0) + v4l2_dbg(1, debug, sd, "init error 0x%x\n", i); + return 0; +} + +static int adv7175_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + + v4l2_device_unregister_subdev(sd); + return 0; +} + +/* ----------------------------------------------------------------------- */ + +static const struct i2c_device_id adv7175_id[] = { + { "adv7175", 0 }, + { "adv7176", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, adv7175_id); + +static struct i2c_driver adv7175_driver = { + .driver = { + .name = "adv7175", + }, + .probe = adv7175_probe, + .remove = adv7175_remove, + .id_table = adv7175_id, +}; + +module_i2c_driver(adv7175_driver); |