diff options
Diffstat (limited to 'drivers/media/i2c/bt866.c')
| -rw-r--r-- | drivers/media/i2c/bt866.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/drivers/media/i2c/bt866.c b/drivers/media/i2c/bt866.c new file mode 100644 index 0000000000..dada059cbc --- /dev/null +++ b/drivers/media/i2c/bt866.c @@ -0,0 +1,214 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + bt866 - BT866 Digital Video Encoder (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> + + This code was modify/ported from the saa7111 driver written + by Dave Perks. + + This code was adapted for the bt866 by Christer Weinigel and ported + to 2.6 by Martin Samuelsson. + +*/ + +#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("Brooktree-866 video encoder 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 bt866 { + struct v4l2_subdev sd; + u8 reg[256]; +}; + +static inline struct bt866 *to_bt866(struct v4l2_subdev *sd) +{ + return container_of(sd, struct bt866, sd); +} + +static int bt866_write(struct bt866 *encoder, u8 subaddr, u8 data) +{ + struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd); + u8 buffer[2]; + int err; + + buffer[0] = subaddr; + buffer[1] = data; + + encoder->reg[subaddr] = data; + + v4l_dbg(1, debug, client, "write 0x%02x = 0x%02x\n", subaddr, data); + + for (err = 0; err < 3;) { + if (i2c_master_send(client, buffer, 2) == 2) + break; + err++; + v4l_warn(client, "error #%d writing to 0x%02x\n", + err, subaddr); + schedule_timeout_interruptible(msecs_to_jiffies(100)); + } + if (err == 3) { + v4l_warn(client, "giving up\n"); + return -1; + } + + return 0; +} + +static int bt866_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) +{ + v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std); + + /* Only PAL supported by this driver at the moment! */ + if (!(std & V4L2_STD_NTSC)) + return -EINVAL; + return 0; +} + +static int bt866_s_routing(struct v4l2_subdev *sd, + u32 input, u32 output, u32 config) +{ + static const __u8 init[] = { + 0xc8, 0xcc, /* CRSCALE */ + 0xca, 0x91, /* CBSCALE */ + 0xcc, 0x24, /* YC16 | OSDNUM */ + 0xda, 0x00, /* */ + 0xdc, 0x24, /* SETMODE | PAL */ + 0xde, 0x02, /* EACTIVE */ + + /* overlay colors */ + 0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */ + 0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */ + 0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */ + 0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */ + 0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */ + 0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */ + 0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */ + 0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */ + + 0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */ + 0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */ + 0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */ + 0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */ + 0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */ + 0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */ + 0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */ + 0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */ + }; + struct bt866 *encoder = to_bt866(sd); + u8 val; + int i; + + for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2) + bt866_write(encoder, init[i], init[i+1]); + + val = encoder->reg[0xdc]; + + if (input == 0) + val |= 0x40; /* CBSWAP */ + else + val &= ~0x40; /* !CBSWAP */ + + bt866_write(encoder, 0xdc, val); + + val = encoder->reg[0xcc]; + if (input == 2) + val |= 0x01; /* OSDBAR */ + else + val &= ~0x01; /* !OSDBAR */ + bt866_write(encoder, 0xcc, val); + + v4l2_dbg(1, debug, sd, "set input %d\n", input); + + switch (input) { + case 0: + case 1: + case 2: + break; + default: + return -EINVAL; + } + return 0; +} + +#if 0 +/* Code to setup square pixels, might be of some use in the future, + but is currently unused. */ + val = encoder->reg[0xdc]; + if (*iarg) + val |= 1; /* SQUARE */ + else + val &= ~1; /* !SQUARE */ + bt866_write(client, 0xdc, val); +#endif + +/* ----------------------------------------------------------------------- */ + +static const struct v4l2_subdev_video_ops bt866_video_ops = { + .s_std_output = bt866_s_std_output, + .s_routing = bt866_s_routing, +}; + +static const struct v4l2_subdev_ops bt866_ops = { + .video = &bt866_video_ops, +}; + +static int bt866_probe(struct i2c_client *client) +{ + struct bt866 *encoder; + struct v4l2_subdev *sd; + + 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, &bt866_ops); + return 0; +} + +static void bt866_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + + v4l2_device_unregister_subdev(sd); +} + +static const struct i2c_device_id bt866_id[] = { + { "bt866", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, bt866_id); + +static struct i2c_driver bt866_driver = { + .driver = { + .name = "bt866", + }, + .probe = bt866_probe, + .remove = bt866_remove, + .id_table = bt866_id, +}; + +module_i2c_driver(bt866_driver); |