// SPDX-License-Identifier: GPL-2.0-or-later /* * bt856 - BT856A Digital Video Encoder (Rockwell Part) * * Copyright (C) 1999 Mike Bernson * Copyright (C) 1998 Dave Perks * * Modifications for LML33/DC10plus unified driver * Copyright (C) 2000 Serguei Miridonov * * This code was modify/ported from the saa7111 driver written * by Dave Perks. * * Changes by Ronald Bultje * - moved over to linux>=2.4.x i2c protocol (9/9/2002) */ #include #include #include #include #include #include #include #include MODULE_DESCRIPTION("Brooktree-856A 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)"); /* ----------------------------------------------------------------------- */ #define BT856_REG_OFFSET 0xDA #define BT856_NR_REG 6 struct bt856 { struct v4l2_subdev sd; unsigned char reg[BT856_NR_REG]; v4l2_std_id norm; }; static inline struct bt856 *to_bt856(struct v4l2_subdev *sd) { return container_of(sd, struct bt856, sd); } /* ----------------------------------------------------------------------- */ static inline int bt856_write(struct bt856 *encoder, u8 reg, u8 value) { struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd); encoder->reg[reg - BT856_REG_OFFSET] = value; return i2c_smbus_write_byte_data(client, reg, value); } static inline int bt856_setbit(struct bt856 *encoder, u8 reg, u8 bit, u8 value) { return bt856_write(encoder, reg, (encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) | (value ? (1 << bit) : 0)); } static void bt856_dump(struct bt856 *encoder) { int i; v4l2_info(&encoder->sd, "register dump:\n"); for (i = 0; i < BT856_NR_REG; i += 2) printk(KERN_CONT " %02x", encoder->reg[i]); printk(KERN_CONT "\n"); } /* ----------------------------------------------------------------------- */ static int bt856_init(struct v4l2_subdev *sd, u32 arg) { struct bt856 *encoder = to_bt856(sd); /* This is just for testing!!! */ v4l2_dbg(1, debug, sd, "init\n"); bt856_write(encoder, 0xdc, 0x18); bt856_write(encoder, 0xda, 0); bt856_write(encoder, 0xde, 0); bt856_setbit(encoder, 0xdc, 3, 1); /*bt856_setbit(encoder, 0xdc, 6, 0);*/ bt856_setbit(encoder, 0xdc, 4, 1); if (encoder->norm & V4L2_STD_NTSC) bt856_setbit(encoder, 0xdc, 2, 0); else bt856_setbit(encoder, 0xdc, 2, 1); bt856_setbit(encoder, 0xdc, 1, 1); bt856_setbit(encoder, 0xde, 4, 0); bt856_setbit(encoder, 0xde, 3, 1); if (debug != 0) bt856_dump(encoder); return 0; } static int bt856_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) { struct bt856 *encoder = to_bt856(sd); v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std); if (std & V4L2_STD_NTSC) { bt856_setbit(encoder, 0xdc, 2, 0); } else if (std & V4L2_STD_PAL) { bt856_setbit(encoder, 0xdc, 2, 1); bt856_setbit(encoder, 0xda, 0, 0); /*bt856_setbit(encoder, 0xda, 0, 1);*/ } else { return -EINVAL; } encoder->norm = std; if (debug != 0) bt856_dump(encoder); return 0; } static int bt856_s_routing(struct v4l2_subdev *sd, u32 input, u32 output, u32 config) { struct bt856 *encoder = to_bt856(sd); v4l2_dbg(1, debug, sd, "set input %d\n", input); /* We only have video bus. * input= 0: input is from bt819 * input= 1: input is from ZR36060 */ switch (input) { case 0: bt856_setbit(encoder, 0xde, 4, 0); bt856_setbit(encoder, 0xde, 3, 1); bt856_setbit(encoder, 0xdc, 3, 1); bt856_setbit(encoder, 0xdc, 6, 0); break; case 1: bt856_setbit(encoder, 0xde, 4, 0); bt856_setbit(encoder, 0xde, 3, 1); bt856_setbit(encoder, 0xdc, 3, 1); bt856_setbit(encoder, 0xdc, 6, 1); break; case 2: /* Color bar */ bt856_setbit(encoder, 0xdc, 3, 0); bt856_setbit(encoder, 0xde, 4, 1); break; default: return -EINVAL; } if (debug != 0) bt856_dump(encoder); return 0; } /* ----------------------------------------------------------------------- */ static const struct v4l2_subdev_core_ops bt856_core_ops = { .init = bt856_init, }; static const struct v4l2_subdev_video_ops bt856_video_ops = { .s_std_output = bt856_s_std_output, .s_routing = bt856_s_routing, }; static const struct v4l2_subdev_ops bt856_ops = { .core = &bt856_core_ops, .video = &bt856_video_ops, }; /* ----------------------------------------------------------------------- */ static int bt856_probe(struct i2c_client *client) { struct bt856 *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, &bt856_ops); encoder->norm = V4L2_STD_NTSC; bt856_write(encoder, 0xdc, 0x18); bt856_write(encoder, 0xda, 0); bt856_write(encoder, 0xde, 0); bt856_setbit(encoder, 0xdc, 3, 1); /*bt856_setbit(encoder, 0xdc, 6, 0);*/ bt856_setbit(encoder, 0xdc, 4, 1); if (encoder->norm & V4L2_STD_NTSC) bt856_setbit(encoder, 0xdc, 2, 0); else bt856_setbit(encoder, 0xdc, 2, 1); bt856_setbit(encoder, 0xdc, 1, 1); bt856_setbit(encoder, 0xde, 4, 0); bt856_setbit(encoder, 0xde, 3, 1); if (debug != 0) bt856_dump(encoder); return 0; } static void bt856_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); v4l2_device_unregister_subdev(sd); } static const struct i2c_device_id bt856_id[] = { { "bt856" }, { } }; MODULE_DEVICE_TABLE(i2c, bt856_id); static struct i2c_driver bt856_driver = { .driver = { .name = "bt856", }, .probe = bt856_probe, .remove = bt856_remove, .id_table = bt856_id, }; module_i2c_driver(bt856_driver);