drivers/media/video/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/ioctl.h>
  34 #include <asm/uaccess.h>
  35 #include <linux/i2c.h>
  36 #include <linux/i2c-id.h>
  37 #include <linux/videodev2.h>
  38 #include <media/v4l2-device.h>
  39 #include <media/v4l2-chip-ident.h>
  40 #include <media/v4l2-i2c-drv.h>
  41
  42 MODULE_DESCRIPTION("Brooktree-866 video encoder driver");
  43 MODULE_AUTHOR("Mike Bernson & Dave Perks");
  44 MODULE_LICENSE("GPL");
  45
  46 static int debug;
  47 module_param(debug, int, 0);
  48 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  49
  50
  51 /* ----------------------------------------------------------------------- */
  52
  53 struct bt866 {
  54         struct v4l2_subdev sd;
  55         u8 reg[256];
  56 };
  57
  58 static inline struct bt866 *to_bt866(struct v4l2_subdev *sd)
  59 {
  60         return container_of(sd, struct bt866, sd);
  61 }
  62
  63 static int bt866_write(struct bt866 *encoder, u8 subaddr, u8 data)
  64 {
  65         struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
  66         u8 buffer[2];
  67         int err;
  68
  69         buffer[0] = subaddr;
  70         buffer[1] = data;
  71
  72         encoder->reg[subaddr] = data;
  73
  74         v4l_dbg(1, debug, client, "write 0x%02x = 0x%02x\n", subaddr, data);
  75
  76         for (err = 0; err < 3;) {
  77                 if (i2c_master_send(client, buffer, 2) == 2)
  78                         break;
  79                 err++;
  80                 v4l_warn(client, "error #%d writing to 0x%02x\n",
  81                                 err, subaddr);
  82                 schedule_timeout_interruptible(msecs_to_jiffies(100));
  83         }
  84         if (err == 3) {
  85                 v4l_warn(client, "giving up\n");
  86                 return -1;
  87         }
  88
  89         return 0;
  90 }
  91
  92 static int bt866_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
  93 {
  94         v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
  95
  96         /* Only PAL supported by this driver at the moment! */
  97         if (!(std & V4L2_STD_NTSC))
  98                 return -EINVAL;
  99         return 0;
 100 }
 101
 102 static int bt866_s_routing(struct v4l2_subdev *sd,
 103                            u32 input, u32 output, u32 config)
 104 {
 105         static const __u8 init[] = {
 106                 0xc8, 0xcc, /* CRSCALE */
 107                 0xca, 0x91, /* CBSCALE */
 108                 0xcc, 0x24, /* YC16 | OSDNUM */
 109                 0xda, 0x00, /*  */
 110                 0xdc, 0x24, /* SETMODE | PAL */
 111                 0xde, 0x02, /* EACTIVE */
 112
 113                 /* overlay colors */
 114                 0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */
 115                 0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */
 116                 0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */
 117                 0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */
 118                 0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */
 119                 0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */
 120                 0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */
 121                 0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */
 122
 123                 0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */
 124                 0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */
 125                 0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */
 126                 0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */
 127                 0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */
 128                 0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */
 129                 0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */
 130                 0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */
 131         };
 132         struct bt866 *encoder = to_bt866(sd);
 133         u8 val;
 134         int i;
 135
 136         for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2)
 137                 bt866_write(encoder, init[i], init[i+1]);
 138
 139         val = encoder->reg[0xdc];
 140
 141         if (input == 0)
 142                 val |= 0x40; /* CBSWAP */
 143         else
 144                 val &= ~0x40; /* !CBSWAP */
 145
 146         bt866_write(encoder, 0xdc, val);
 147
 148         val = encoder->reg[0xcc];
 149         if (input == 2)
 150                 val |= 0x01; /* OSDBAR */
 151         else
 152                 val &= ~0x01; /* !OSDBAR */
 153         bt866_write(encoder, 0xcc, val);
 154
 155         v4l2_dbg(1, debug, sd, "set input %d\n", input);
 156
 157         switch (input) {
 158         case 0:
 159         case 1:
 160         case 2:
 161                 break;
 162         default:
 163                 return -EINVAL;
 164         }
 165         return 0;
 166 }
 167
 168 #if 0
 169 /* Code to setup square pixels, might be of some use in the future,
 170    but is currently unused. */
 171         val = encoder->reg[0xdc];
 172         if (*iarg)
 173                 val |= 1; /* SQUARE */
 174         else
 175                 val &= ~1; /* !SQUARE */
 176         bt866_write(client, 0xdc, val);
 177 #endif
 178
 179 static int bt866_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 180 {
 181         struct i2c_client *client = v4l2_get_subdevdata(sd);
 182
 183         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_BT866, 0);
 184 }
 185
 186 /* ----------------------------------------------------------------------- */
 187
 188 static const struct v4l2_subdev_core_ops bt866_core_ops = {
 189         .g_chip_ident = bt866_g_chip_ident,
 190 };
 191
 192 static const struct v4l2_subdev_video_ops bt866_video_ops = {
 193         .s_std_output = bt866_s_std_output,
 194         .s_routing = bt866_s_routing,
 195 };
 196
 197 static const struct v4l2_subdev_ops bt866_ops = {
 198         .core = &bt866_core_ops,
 199         .video = &bt866_video_ops,
 200 };
 201
 202 static int bt866_probe(struct i2c_client *client,
 203                         const struct i2c_device_id *id)
 204 {
 205         struct bt866 *encoder;
 206         struct v4l2_subdev *sd;
 207
 208         v4l_info(client, "chip found @ 0x%x (%s)\n",
 209                         client->addr << 1, client->adapter->name);
 210
 211         encoder = kzalloc(sizeof(*encoder), GFP_KERNEL);
 212         if (encoder == NULL)
 213                 return -ENOMEM;
 214         sd = &encoder->sd;
 215         v4l2_i2c_subdev_init(sd, client, &bt866_ops);
 216         return 0;
 217 }
 218
 219 static int bt866_remove(struct i2c_client *client)
 220 {
 221         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 222
 223         v4l2_device_unregister_subdev(sd);
 224         kfree(to_bt866(sd));
 225         return 0;
 226 }
 227
 228 static const struct i2c_device_id bt866_id[] = {
 229         { "bt866", 0 },
 230         { }
 231 };
 232 MODULE_DEVICE_TABLE(i2c, bt866_id);
 233
 234 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 235         .name = "bt866",
 236         .probe = bt866_probe,
 237         .remove = bt866_remove,
 238         .id_table = bt866_id,
 239 };