diff options
Diffstat (limited to 'drivers/media/i2c/bt819.c')
| -rw-r--r-- | drivers/media/i2c/bt819.c | 517 |
1 files changed, 517 insertions, 0 deletions
diff --git a/drivers/media/i2c/bt819.c b/drivers/media/i2c/bt819.c new file mode 100644 index 0000000..377bf05 --- /dev/null +++ b/drivers/media/i2c/bt819.c @@ -0,0 +1,517 @@ +/* + * bt819 - BT819A VideoStream Decoder (Rockwell Part) + * + * Copyright (C) 1999 Mike Bernson <mike@mlb.org> + * Copyright (C) 1998 Dave Perks <dperks@ibm.net> + * + * Modifications for LML33/DC10plus unified driver + * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx> + * + * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> + * - moved over to linux>=2.4.x i2c protocol (9/9/2002) + * + * This code was modify/ported from the saa7111 driver written + * by Dave Perks. + * + * 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/ioctl.h> +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/videodev2.h> +#include <linux/slab.h> +#include <media/v4l2-device.h> +#include <media/v4l2-chip-ident.h> +#include <media/v4l2-ctrls.h> +#include <media/bt819.h> + +MODULE_DESCRIPTION("Brooktree-819 video decoder driver"); +MODULE_AUTHOR("Mike Bernson & Dave Perks"); +MODULE_LICENSE("GPL"); + +static int debug; +module_param(debug, int, 0); +MODULE_PARM_DESC(debug, "Debug level (0-1)"); + + +/* ----------------------------------------------------------------------- */ + +struct bt819 { + struct v4l2_subdev sd; + struct v4l2_ctrl_handler hdl; + unsigned char reg[32]; + + v4l2_std_id norm; + int ident; + int input; + int enable; +}; + +static inline struct bt819 *to_bt819(struct v4l2_subdev *sd) +{ + return container_of(sd, struct bt819, sd); +} + +static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) +{ + return &container_of(ctrl->handler, struct bt819, hdl)->sd; +} + +struct timing { + int hactive; + int hdelay; + int vactive; + int vdelay; + int hscale; + int vscale; +}; + +/* for values, see the bt819 datasheet */ +static struct timing timing_data[] = { + {864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000}, + {858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000}, +}; + +/* ----------------------------------------------------------------------- */ + +static inline int bt819_write(struct bt819 *decoder, u8 reg, u8 value) +{ + struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd); + + decoder->reg[reg] = value; + return i2c_smbus_write_byte_data(client, reg, value); +} + +static inline int bt819_setbit(struct bt819 *decoder, u8 reg, u8 bit, u8 value) +{ + return bt819_write(decoder, reg, + (decoder->reg[reg] & ~(1 << bit)) | (value ? (1 << bit) : 0)); +} + +static int bt819_write_block(struct bt819 *decoder, const u8 *data, unsigned int len) +{ + struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd); + int ret = -1; + u8 reg; + + /* the bt819 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++] = + decoder->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 = bt819_write(decoder, reg, *data++); + if (ret < 0) + break; + len -= 2; + } + } + + return ret; +} + +static inline int bt819_read(struct bt819 *decoder, u8 reg) +{ + struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd); + + return i2c_smbus_read_byte_data(client, reg); +} + +static int bt819_init(struct v4l2_subdev *sd) +{ + static unsigned char init[] = { + /*0x1f, 0x00,*/ /* Reset */ + 0x01, 0x59, /* 0x01 input format */ + 0x02, 0x00, /* 0x02 temporal decimation */ + 0x03, 0x12, /* 0x03 Cropping msb */ + 0x04, 0x16, /* 0x04 Vertical Delay, lsb */ + 0x05, 0xe0, /* 0x05 Vertical Active lsb */ + 0x06, 0x80, /* 0x06 Horizontal Delay lsb */ + 0x07, 0xd0, /* 0x07 Horizontal Active lsb */ + 0x08, 0x00, /* 0x08 Horizontal Scaling msb */ + 0x09, 0xf8, /* 0x09 Horizontal Scaling lsb */ + 0x0a, 0x00, /* 0x0a Brightness control */ + 0x0b, 0x30, /* 0x0b Miscellaneous control */ + 0x0c, 0xd8, /* 0x0c Luma Gain lsb */ + 0x0d, 0xfe, /* 0x0d Chroma Gain (U) lsb */ + 0x0e, 0xb4, /* 0x0e Chroma Gain (V) msb */ + 0x0f, 0x00, /* 0x0f Hue control */ + 0x12, 0x04, /* 0x12 Output Format */ + 0x13, 0x20, /* 0x13 Vertial Scaling msb 0x00 + chroma comb OFF, line drop scaling, interlace scaling + BUG? Why does turning the chroma comb on fuck up color? + Bug in the bt819 stepping on my board? + */ + 0x14, 0x00, /* 0x14 Vertial Scaling lsb */ + 0x16, 0x07, /* 0x16 Video Timing Polarity + ACTIVE=active low + FIELD: high=odd, + vreset=active high, + hreset=active high */ + 0x18, 0x68, /* 0x18 AGC Delay */ + 0x19, 0x5d, /* 0x19 Burst Gate Delay */ + 0x1a, 0x80, /* 0x1a ADC Interface */ + }; + + struct bt819 *decoder = to_bt819(sd); + struct timing *timing = &timing_data[(decoder->norm & V4L2_STD_525_60) ? 1 : 0]; + + init[0x03 * 2 - 1] = + (((timing->vdelay >> 8) & 0x03) << 6) | + (((timing->vactive >> 8) & 0x03) << 4) | + (((timing->hdelay >> 8) & 0x03) << 2) | + ((timing->hactive >> 8) & 0x03); + init[0x04 * 2 - 1] = timing->vdelay & 0xff; + init[0x05 * 2 - 1] = timing->vactive & 0xff; + init[0x06 * 2 - 1] = timing->hdelay & 0xff; + init[0x07 * 2 - 1] = timing->hactive & 0xff; + init[0x08 * 2 - 1] = timing->hscale >> 8; + init[0x09 * 2 - 1] = timing->hscale & 0xff; + /* 0x15 in array is address 0x19 */ + init[0x15 * 2 - 1] = (decoder->norm & V4L2_STD_625_50) ? 115 : 93; /* Chroma burst delay */ + /* reset */ + bt819_write(decoder, 0x1f, 0x00); + mdelay(1); + + /* init */ + return bt819_write_block(decoder, init, sizeof(init)); +} + +/* ----------------------------------------------------------------------- */ + +static int bt819_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd) +{ + struct bt819 *decoder = to_bt819(sd); + int status = bt819_read(decoder, 0x00); + int res = V4L2_IN_ST_NO_SIGNAL; + v4l2_std_id std; + + if ((status & 0x80)) + res = 0; + + if ((status & 0x10)) + std = V4L2_STD_PAL; + else + std = V4L2_STD_NTSC; + if (pstd) + *pstd = std; + if (pstatus) + *pstatus = res; + + v4l2_dbg(1, debug, sd, "get status %x\n", status); + return 0; +} + +static int bt819_querystd(struct v4l2_subdev *sd, v4l2_std_id *std) +{ + return bt819_status(sd, NULL, std); +} + +static int bt819_g_input_status(struct v4l2_subdev *sd, u32 *status) +{ + return bt819_status(sd, status, NULL); +} + +static int bt819_s_std(struct v4l2_subdev *sd, v4l2_std_id std) +{ + struct bt819 *decoder = to_bt819(sd); + struct timing *timing = NULL; + + v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std); + + if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL) + v4l2_err(sd, "no notify found!\n"); + + if (std & V4L2_STD_NTSC) { + v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL); + bt819_setbit(decoder, 0x01, 0, 1); + bt819_setbit(decoder, 0x01, 1, 0); + bt819_setbit(decoder, 0x01, 5, 0); + bt819_write(decoder, 0x18, 0x68); + bt819_write(decoder, 0x19, 0x5d); + /* bt819_setbit(decoder, 0x1a, 5, 1); */ + timing = &timing_data[1]; + } else if (std & V4L2_STD_PAL) { + v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL); + bt819_setbit(decoder, 0x01, 0, 1); + bt819_setbit(decoder, 0x01, 1, 1); + bt819_setbit(decoder, 0x01, 5, 1); + bt819_write(decoder, 0x18, 0x7f); + bt819_write(decoder, 0x19, 0x72); + /* bt819_setbit(decoder, 0x1a, 5, 0); */ + timing = &timing_data[0]; + } else { + v4l2_dbg(1, debug, sd, "unsupported norm %llx\n", + (unsigned long long)std); + return -EINVAL; + } + bt819_write(decoder, 0x03, + (((timing->vdelay >> 8) & 0x03) << 6) | + (((timing->vactive >> 8) & 0x03) << 4) | + (((timing->hdelay >> 8) & 0x03) << 2) | + ((timing->hactive >> 8) & 0x03)); + bt819_write(decoder, 0x04, timing->vdelay & 0xff); + bt819_write(decoder, 0x05, timing->vactive & 0xff); + bt819_write(decoder, 0x06, timing->hdelay & 0xff); + bt819_write(decoder, 0x07, timing->hactive & 0xff); + bt819_write(decoder, 0x08, (timing->hscale >> 8) & 0xff); + bt819_write(decoder, 0x09, timing->hscale & 0xff); + decoder->norm = std; + v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, NULL); + return 0; +} + +static int bt819_s_routing(struct v4l2_subdev *sd, + u32 input, u32 output, u32 config) +{ + struct bt819 *decoder = to_bt819(sd); + + v4l2_dbg(1, debug, sd, "set input %x\n", input); + + if (input > 7) + return -EINVAL; + + if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL) + v4l2_err(sd, "no notify found!\n"); + + if (decoder->input != input) { + v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL); + decoder->input = input; + /* select mode */ + if (decoder->input == 0) { + bt819_setbit(decoder, 0x0b, 6, 0); + bt819_setbit(decoder, 0x1a, 1, 1); + } else { + bt819_setbit(decoder, 0x0b, 6, 1); + bt819_setbit(decoder, 0x1a, 1, 0); + } + v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, NULL); + } + return 0; +} + +static int bt819_s_stream(struct v4l2_subdev *sd, int enable) +{ + struct bt819 *decoder = to_bt819(sd); + + v4l2_dbg(1, debug, sd, "enable output %x\n", enable); + + if (decoder->enable != enable) { + decoder->enable = enable; + bt819_setbit(decoder, 0x16, 7, !enable); + } + return 0; +} + +static int bt819_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct v4l2_subdev *sd = to_sd(ctrl); + struct bt819 *decoder = to_bt819(sd); + int temp; + + switch (ctrl->id) { + case V4L2_CID_BRIGHTNESS: + bt819_write(decoder, 0x0a, ctrl->val); + break; + + case V4L2_CID_CONTRAST: + bt819_write(decoder, 0x0c, ctrl->val & 0xff); + bt819_setbit(decoder, 0x0b, 2, ((ctrl->val >> 8) & 0x01)); + break; + + case V4L2_CID_SATURATION: + bt819_write(decoder, 0x0d, (ctrl->val >> 7) & 0xff); + bt819_setbit(decoder, 0x0b, 1, ((ctrl->val >> 15) & 0x01)); + + /* Ratio between U gain and V gain must stay the same as + the ratio between the default U and V gain values. */ + temp = (ctrl->val * 180) / 254; + bt819_write(decoder, 0x0e, (temp >> 7) & 0xff); + bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01); + break; + + case V4L2_CID_HUE: + bt819_write(decoder, 0x0f, ctrl->val); + break; + + default: + return -EINVAL; + } + return 0; +} + +static int bt819_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) +{ + struct bt819 *decoder = to_bt819(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + + return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0); +} + +/* ----------------------------------------------------------------------- */ + +static const struct v4l2_ctrl_ops bt819_ctrl_ops = { + .s_ctrl = bt819_s_ctrl, +}; + +static const struct v4l2_subdev_core_ops bt819_core_ops = { + .g_chip_ident = bt819_g_chip_ident, + .g_ext_ctrls = v4l2_subdev_g_ext_ctrls, + .try_ext_ctrls = v4l2_subdev_try_ext_ctrls, + .s_ext_ctrls = v4l2_subdev_s_ext_ctrls, + .g_ctrl = v4l2_subdev_g_ctrl, + .s_ctrl = v4l2_subdev_s_ctrl, + .queryctrl = v4l2_subdev_queryctrl, + .querymenu = v4l2_subdev_querymenu, + .s_std = bt819_s_std, +}; + +static const struct v4l2_subdev_video_ops bt819_video_ops = { + .s_routing = bt819_s_routing, + .s_stream = bt819_s_stream, + .querystd = bt819_querystd, + .g_input_status = bt819_g_input_status, +}; + +static const struct v4l2_subdev_ops bt819_ops = { + .core = &bt819_core_ops, + .video = &bt819_video_ops, +}; + +/* ----------------------------------------------------------------------- */ + +static int bt819_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int i, ver; + struct bt819 *decoder; + struct v4l2_subdev *sd; + const char *name; + + /* Check if the adapter supports the needed features */ + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL); + if (decoder == NULL) + return -ENOMEM; + sd = &decoder->sd; + v4l2_i2c_subdev_init(sd, client, &bt819_ops); + + ver = bt819_read(decoder, 0x17); + switch (ver & 0xf0) { + case 0x70: + name = "bt819a"; + decoder->ident = V4L2_IDENT_BT819A; + break; + case 0x60: + name = "bt817a"; + decoder->ident = V4L2_IDENT_BT817A; + break; + case 0x20: + name = "bt815a"; + decoder->ident = V4L2_IDENT_BT815A; + break; + default: + v4l2_dbg(1, debug, sd, + "unknown chip version 0x%02x\n", ver); + return -ENODEV; + } + + v4l_info(client, "%s found @ 0x%x (%s)\n", name, + client->addr << 1, client->adapter->name); + + decoder->norm = V4L2_STD_NTSC; + decoder->input = 0; + decoder->enable = 1; + + i = bt819_init(sd); + if (i < 0) + v4l2_dbg(1, debug, sd, "init status %d\n", i); + + v4l2_ctrl_handler_init(&decoder->hdl, 4); + v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops, + V4L2_CID_BRIGHTNESS, -128, 127, 1, 0); + v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops, + V4L2_CID_CONTRAST, 0, 511, 1, 0xd8); + v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops, + V4L2_CID_SATURATION, 0, 511, 1, 0xfe); + v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops, + V4L2_CID_HUE, -128, 127, 1, 0); + sd->ctrl_handler = &decoder->hdl; + if (decoder->hdl.error) { + int err = decoder->hdl.error; + + v4l2_ctrl_handler_free(&decoder->hdl); + kfree(decoder); + return err; + } + v4l2_ctrl_handler_setup(&decoder->hdl); + return 0; +} + +static int bt819_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct bt819 *decoder = to_bt819(sd); + + v4l2_device_unregister_subdev(sd); + v4l2_ctrl_handler_free(&decoder->hdl); + kfree(decoder); + return 0; +} + +/* ----------------------------------------------------------------------- */ + +static const struct i2c_device_id bt819_id[] = { + { "bt819a", 0 }, + { "bt817a", 0 }, + { "bt815a", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, bt819_id); + +static struct i2c_driver bt819_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "bt819", + }, + .probe = bt819_probe, + .remove = bt819_remove, + .id_table = bt819_id, +}; + +module_i2c_driver(bt819_driver); |
