/* * 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) * * 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 #include #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 { unsigned char reg[BT856_NR_REG]; int norm; int enable; }; /* ----------------------------------------------------------------------- */ static inline int bt856_write(struct i2c_client *client, u8 reg, u8 value) { struct bt856 *encoder = i2c_get_clientdata(client); encoder->reg[reg - BT856_REG_OFFSET] = value; return i2c_smbus_write_byte_data(client, reg, value); } static inline int bt856_setbit(struct i2c_client *client, u8 reg, u8 bit, u8 value) { struct bt856 *encoder = i2c_get_clientdata(client); return bt856_write(client, reg, (encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) | (value ? (1 << bit) : 0)); } static void bt856_dump(struct i2c_client *client) { int i; struct bt856 *encoder = i2c_get_clientdata(client); v4l_info(client, "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_command(struct i2c_client *client, unsigned cmd, void *arg) { struct bt856 *encoder = i2c_get_clientdata(client); switch (cmd) { case 0: /* This is just for testing!!! */ v4l_dbg(1, debug, client, "init\n"); bt856_write(client, 0xdc, 0x18); bt856_write(client, 0xda, 0); bt856_write(client, 0xde, 0); bt856_setbit(client, 0xdc, 3, 1); //bt856_setbit(client, 0xdc, 6, 0); bt856_setbit(client, 0xdc, 4, 1); switch (encoder->norm) { case VIDEO_MODE_NTSC: bt856_setbit(client, 0xdc, 2, 0); break; case VIDEO_MODE_PAL: bt856_setbit(client, 0xdc, 2, 1); break; } bt856_setbit(client, 0xdc, 1, 1); bt856_setbit(client, 0xde, 4, 0); bt856_setbit(client, 0xde, 3, 1); if (debug != 0) bt856_dump(client); break; case ENCODER_GET_CAPABILITIES: { struct video_encoder_capability *cap = arg; v4l_dbg(1, debug, client, "get capabilities\n"); cap->flags = VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC | VIDEO_ENCODER_CCIR; cap->inputs = 2; cap->outputs = 1; break; } case ENCODER_SET_NORM: { int *iarg = arg; v4l_dbg(1, debug, client, "set norm %d\n", *iarg); switch (*iarg) { case VIDEO_MODE_NTSC: bt856_setbit(client, 0xdc, 2, 0); break; case VIDEO_MODE_PAL: bt856_setbit(client, 0xdc, 2, 1); bt856_setbit(client, 0xda, 0, 0); //bt856_setbit(client, 0xda, 0, 1); break; default: return -EINVAL; } encoder->norm = *iarg; if (debug != 0) bt856_dump(client); break; } case ENCODER_SET_INPUT: { int *iarg = arg; v4l_dbg(1, debug, client, "set input %d\n", *iarg); /* We only have video bus. * iarg = 0: input is from bt819 * iarg = 1: input is from ZR36060 */ switch (*iarg) { case 0: bt856_setbit(client, 0xde, 4, 0); bt856_setbit(client, 0xde, 3, 1); bt856_setbit(client, 0xdc, 3, 1); bt856_setbit(client, 0xdc, 6, 0); break; case 1: bt856_setbit(client, 0xde, 4, 0); bt856_setbit(client, 0xde, 3, 1); bt856_setbit(client, 0xdc, 3, 1); bt856_setbit(client, 0xdc, 6, 1); break; case 2: // Color bar bt856_setbit(client, 0xdc, 3, 0); bt856_setbit(client, 0xde, 4, 1); break; default: return -EINVAL; } if (debug != 0) bt856_dump(client); break; } case ENCODER_SET_OUTPUT: { int *iarg = arg; v4l_dbg(1, debug, client, "set output %d\n", *iarg); /* not much choice of outputs */ if (*iarg != 0) return -EINVAL; break; } case ENCODER_ENABLE_OUTPUT: { int *iarg = arg; encoder->enable = !!*iarg; v4l_dbg(1, debug, client, "enable output %d\n", encoder->enable); break; } default: return -EINVAL; } return 0; } /* ----------------------------------------------------------------------- */ static unsigned short normal_i2c[] = { 0x88 >> 1, I2C_CLIENT_END }; I2C_CLIENT_INSMOD; static int bt856_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct bt856 *encoder; /* 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 = kzalloc(sizeof(struct bt856), GFP_KERNEL); if (encoder == NULL) return -ENOMEM; encoder->norm = VIDEO_MODE_NTSC; encoder->enable = 1; i2c_set_clientdata(client, encoder); bt856_write(client, 0xdc, 0x18); bt856_write(client, 0xda, 0); bt856_write(client, 0xde, 0); bt856_setbit(client, 0xdc, 3, 1); //bt856_setbit(client, 0xdc, 6, 0); bt856_setbit(client, 0xdc, 4, 1); switch (encoder->norm) { case VIDEO_MODE_NTSC: bt856_setbit(client, 0xdc, 2, 0); break; case VIDEO_MODE_PAL: bt856_setbit(client, 0xdc, 2, 1); break; } bt856_setbit(client, 0xdc, 1, 1); bt856_setbit(client, 0xde, 4, 0); bt856_setbit(client, 0xde, 3, 1); if (debug != 0) bt856_dump(client); return 0; } static int bt856_remove(struct i2c_client *client) { kfree(i2c_get_clientdata(client)); return 0; } static const struct i2c_device_id bt856_id[] = { { "bt856", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, bt856_id); static struct v4l2_i2c_driver_data v4l2_i2c_data = { .name = "bt856", .driverid = I2C_DRIVERID_BT856, .command = bt856_command, .probe = bt856_probe, .remove = bt856_remove, .id_table = bt856_id, };