drivers/media/i2c/bt866.c

   1 /*
   2     bt866 - BT866 Digital Video Encoder (Rockwell Part)
   3
   4     Copyright (C) 1999 Mike Bernson <mike@mlb.org>
   5     Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   6
   7     Modifications for LML33/DC10plus unified driver
   8     Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   9
  10     This code was modify/ported from the saa7111 driver written
  11     by Dave Perks.
  12
  13     This code was adapted for the bt866 by Christer Weinigel and ported
  14     to 2.6 by Martin Samuelsson.
  15
  16     This program is free software; you can redistribute it and/or modify
  17     it under the terms of the GNU General Public License as published by
  18     the Free Software Foundation; either version 2 of the License, or
  19     (at your option) any later version.
  20
  21     This program is distributed in the hope that it will be useful,
  22     but WITHOUT ANY WARRANTY; without even the implied warranty of
  23     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24     GNU General Public License for more details.
  25
  26     You should have received a copy of the GNU General Public License
  27     along with this program; if not, write to the Free Software
  28     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  29 */
  30
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/slab.h>
  34 #include <linux/ioctl.h>
  35 #include <linux/uaccess.h>
  36 #include <linux/i2c.h>
  37 #include <linux/videodev2.h>
  38 #include <media/v4l2-device.h>
  39
  40 MODULE_DESCRIPTION("Brooktree-866 video encoder driver");
  41 MODULE_AUTHOR("Mike Bernson & Dave Perks");
  42 MODULE_LICENSE("GPL");
  43
  44 static int debug;
  45 module_param(debug, int, 0);
  46 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  47
  48
  49 /* ----------------------------------------------------------------------- */
  50
  51 struct bt866 {
  52         struct v4l2_subdev sd;
  53         u8 reg[256];
  54 };
  55
  56 static inline struct bt866 *to_bt866(struct v4l2_subdev *sd)
  57 {
  58         return container_of(sd, struct bt866, sd);
  59 }
  60
  61 static int bt866_write(struct bt866 *encoder, u8 subaddr, u8 data)
  62 {
  63         struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
  64         u8 buffer[2];
  65         int err;
  66
  67         buffer[0] = subaddr;
  68         buffer[1] = data;
  69
  70         encoder->reg[subaddr] = data;
  71
  72         v4l_dbg(1, debug, client, "write 0x%02x = 0x%02x\n", subaddr, data);
  73
  74         for (err = 0; err < 3;) {
  75                 if (i2c_master_send(client, buffer, 2) == 2)
  76                         break;
  77                 err++;
  78                 v4l_warn(client, "error #%d writing to 0x%02x\n",
  79                                 err, subaddr);
  80                 schedule_timeout_interruptible(msecs_to_jiffies(100));
  81         }
  82         if (err == 3) {
  83                 v4l_warn(client, "giving up\n");
  84                 return -1;
  85         }
  86
  87         return 0;
  88 }
  89
  90 static int bt866_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
  91 {
  92         v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
  93
  94         /* Only PAL supported by this driver at the moment! */
  95         if (!(std & V4L2_STD_NTSC))
  96                 return -EINVAL;
  97         return 0;
  98 }
  99
 100 static int bt866_s_routing(struct v4l2_subdev *sd,
 101                            u32 input, u32 output, u32 config)
 102 {
 103         static const __u8 init[] = {
 104                 0xc8, 0xcc, /* CRSCALE */
 105                 0xca, 0x91, /* CBSCALE */
 106                 0xcc, 0x24, /* YC16 | OSDNUM */
 107                 0xda, 0x00, /*  */
 108                 0xdc, 0x24, /* SETMODE | PAL */
 109                 0xde, 0x02, /* EACTIVE */
 110
 111                 /* overlay colors */
 112                 0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */
 113                 0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */
 114                 0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */
 115                 0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */
 116                 0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */
 117                 0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */
 118                 0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */
 119                 0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */
 120
 121                 0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */
 122                 0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */
 123                 0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */
 124                 0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */
 125                 0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */
 126                 0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */
 127                 0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */
 128                 0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */
 129         };
 130         struct bt866 *encoder = to_bt866(sd);
 131         u8 val;
 132         int i;
 133
 134         for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2)
 135                 bt866_write(encoder, init[i], init[i+1]);
 136
 137         val = encoder->reg[0xdc];
 138
 139         if (input == 0)
 140                 val |= 0x40; /* CBSWAP */
 141         else
 142                 val &= ~0x40; /* !CBSWAP */
 143
 144         bt866_write(encoder, 0xdc, val);
 145
 146         val = encoder->reg[0xcc];
 147         if (input == 2)
 148                 val |= 0x01; /* OSDBAR */
 149         else
 150                 val &= ~0x01; /* !OSDBAR */
 151         bt866_write(encoder, 0xcc, val);
 152
 153         v4l2_dbg(1, debug, sd, "set input %d\n", input);
 154
 155         switch (input) {
 156         case 0:
 157         case 1:
 158         case 2:
 159                 break;
 160         default:
 161                 return -EINVAL;
 162         }
 163         return 0;
 164 }
 165
 166 #if 0
 167 /* Code to setup square pixels, might be of some use in the future,
 168    but is currently unused. */
 169         val = encoder->reg[0xdc];
 170         if (*iarg)
 171                 val |= 1; /* SQUARE */
 172         else
 173                 val &= ~1; /* !SQUARE */
 174         bt866_write(client, 0xdc, val);
 175 #endif
 176
 177 /* ----------------------------------------------------------------------- */
 178
 179 static const struct v4l2_subdev_video_ops bt866_video_ops = {
 180         .s_std_output = bt866_s_std_output,
 181         .s_routing = bt866_s_routing,
 182 };
 183
 184 static const struct v4l2_subdev_ops bt866_ops = {
 185         .video = &bt866_video_ops,
 186 };
 187
 188 static int bt866_probe(struct i2c_client *client,
 189                         const struct i2c_device_id *id)
 190 {
 191         struct bt866 *encoder;
 192         struct v4l2_subdev *sd;
 193
 194         v4l_info(client, "chip found @ 0x%x (%s)\n",
 195                         client->addr << 1, client->adapter->name);
 196
 197         encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 198         if (encoder == NULL)
 199                 return -ENOMEM;
 200         sd = &encoder->sd;
 201         v4l2_i2c_subdev_init(sd, client, &bt866_ops);
 202         return 0;
 203 }
 204
 205 static int bt866_remove(struct i2c_client *client)
 206 {
 207         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 208
 209         v4l2_device_unregister_subdev(sd);
 210         return 0;
 211 }
 212
 213 static const struct i2c_device_id bt866_id[] = {
 214         { "bt866", 0 },
 215         { }
 216 };
 217 MODULE_DEVICE_TABLE(i2c, bt866_id);
 218
 219 static struct i2c_driver bt866_driver = {
 220         .driver = {
 221                 .name   = "bt866",
 222         },
 223         .probe          = bt866_probe,
 224         .remove         = bt866_remove,
 225         .id_table       = bt866_id,
 226 };
 227
 228 module_i2c_driver(bt866_driver);