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216 lines
5.1 KiB
216 lines
5.1 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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bt866 - BT866 Digital Video Encoder (Rockwell Part) |
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Copyright (C) 1999 Mike Bernson <[email protected]> |
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Copyright (C) 1998 Dave Perks <[email protected]> |
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Modifications for LML33/DC10plus unified driver |
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Copyright (C) 2000 Serguei Miridonov <[email protected]> |
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This code was modify/ported from the saa7111 driver written |
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by Dave Perks. |
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This code was adapted for the bt866 by Christer Weinigel and ported |
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to 2.6 by Martin Samuelsson. |
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*/ |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/slab.h> |
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#include <linux/ioctl.h> |
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#include <linux/uaccess.h> |
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#include <linux/i2c.h> |
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#include <linux/videodev2.h> |
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#include <media/v4l2-device.h> |
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MODULE_DESCRIPTION("Brooktree-866 video encoder driver"); |
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MODULE_AUTHOR("Mike Bernson & Dave Perks"); |
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MODULE_LICENSE("GPL"); |
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static int debug; |
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module_param(debug, int, 0); |
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MODULE_PARM_DESC(debug, "Debug level (0-1)"); |
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/* ----------------------------------------------------------------------- */ |
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struct bt866 { |
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struct v4l2_subdev sd; |
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u8 reg[256]; |
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}; |
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static inline struct bt866 *to_bt866(struct v4l2_subdev *sd) |
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{ |
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return container_of(sd, struct bt866, sd); |
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} |
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static int bt866_write(struct bt866 *encoder, u8 subaddr, u8 data) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd); |
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u8 buffer[2]; |
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int err; |
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buffer[0] = subaddr; |
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buffer[1] = data; |
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encoder->reg[subaddr] = data; |
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v4l_dbg(1, debug, client, "write 0x%02x = 0x%02x\n", subaddr, data); |
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for (err = 0; err < 3;) { |
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if (i2c_master_send(client, buffer, 2) == 2) |
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break; |
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err++; |
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v4l_warn(client, "error #%d writing to 0x%02x\n", |
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err, subaddr); |
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schedule_timeout_interruptible(msecs_to_jiffies(100)); |
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} |
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if (err == 3) { |
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v4l_warn(client, "giving up\n"); |
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return -1; |
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} |
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return 0; |
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} |
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static int bt866_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) |
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{ |
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v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std); |
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/* Only PAL supported by this driver at the moment! */ |
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if (!(std & V4L2_STD_NTSC)) |
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return -EINVAL; |
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return 0; |
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} |
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static int bt866_s_routing(struct v4l2_subdev *sd, |
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u32 input, u32 output, u32 config) |
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{ |
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static const __u8 init[] = { |
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0xc8, 0xcc, /* CRSCALE */ |
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0xca, 0x91, /* CBSCALE */ |
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0xcc, 0x24, /* YC16 | OSDNUM */ |
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0xda, 0x00, /* */ |
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0xdc, 0x24, /* SETMODE | PAL */ |
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0xde, 0x02, /* EACTIVE */ |
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/* overlay colors */ |
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0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */ |
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0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */ |
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0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */ |
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0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */ |
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0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */ |
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0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */ |
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0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */ |
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0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */ |
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0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */ |
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0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */ |
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0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */ |
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0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */ |
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0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */ |
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0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */ |
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0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */ |
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0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */ |
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}; |
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struct bt866 *encoder = to_bt866(sd); |
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u8 val; |
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int i; |
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for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2) |
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bt866_write(encoder, init[i], init[i+1]); |
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val = encoder->reg[0xdc]; |
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if (input == 0) |
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val |= 0x40; /* CBSWAP */ |
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else |
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val &= ~0x40; /* !CBSWAP */ |
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bt866_write(encoder, 0xdc, val); |
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val = encoder->reg[0xcc]; |
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if (input == 2) |
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val |= 0x01; /* OSDBAR */ |
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else |
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val &= ~0x01; /* !OSDBAR */ |
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bt866_write(encoder, 0xcc, val); |
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v4l2_dbg(1, debug, sd, "set input %d\n", input); |
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switch (input) { |
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case 0: |
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case 1: |
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case 2: |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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#if 0 |
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/* Code to setup square pixels, might be of some use in the future, |
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but is currently unused. */ |
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val = encoder->reg[0xdc]; |
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if (*iarg) |
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val |= 1; /* SQUARE */ |
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else |
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val &= ~1; /* !SQUARE */ |
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bt866_write(client, 0xdc, val); |
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#endif |
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/* ----------------------------------------------------------------------- */ |
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static const struct v4l2_subdev_video_ops bt866_video_ops = { |
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.s_std_output = bt866_s_std_output, |
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.s_routing = bt866_s_routing, |
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}; |
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static const struct v4l2_subdev_ops bt866_ops = { |
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.video = &bt866_video_ops, |
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}; |
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static int bt866_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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struct bt866 *encoder; |
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struct v4l2_subdev *sd; |
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v4l_info(client, "chip found @ 0x%x (%s)\n", |
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client->addr << 1, client->adapter->name); |
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encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL); |
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if (encoder == NULL) |
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return -ENOMEM; |
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sd = &encoder->sd; |
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v4l2_i2c_subdev_init(sd, client, &bt866_ops); |
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return 0; |
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} |
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static int bt866_remove(struct i2c_client *client) |
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{ |
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struct v4l2_subdev *sd = i2c_get_clientdata(client); |
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v4l2_device_unregister_subdev(sd); |
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return 0; |
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} |
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static const struct i2c_device_id bt866_id[] = { |
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{ "bt866", 0 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, bt866_id); |
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static struct i2c_driver bt866_driver = { |
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.driver = { |
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.name = "bt866", |
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}, |
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.probe = bt866_probe, |
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.remove = bt866_remove, |
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.id_table = bt866_id, |
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}; |
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module_i2c_driver(bt866_driver);
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