drivers/media/video/upd64031a.c

   1 /*
   2  * upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan
   3  *
   4  * 2003 by T.Adachi <tadachi@tadachi-net.com>
   5  * 2003 by Takeru KOMORIYA <komoriya@paken.org>
   6  * 2006 by Hans Verkuil <hverkuil@xs4all.nl>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  */
  22
  23
  24 #include <linux/version.h>
  25 #include <linux/module.h>
  26 #include <linux/kernel.h>
  27 #include <linux/i2c.h>
  28 #include <linux/videodev2.h>
  29 #include <media/v4l2-common.h>
  30 #include <media/v4l2-chip-ident.h>
  31 #include <media/upd64031a.h>
  32
  33 // --------------------- read registers functions define -----------------------
  34
  35 /* bit masks */
  36 #define GR_MODE_MASK              0xc0
  37 #define DIRECT_3DYCS_CONNECT_MASK 0xc0
  38 #define SYNC_CIRCUIT_MASK         0xa0
  39
  40 // -----------------------------------------------------------------------------
  41
  42 MODULE_DESCRIPTION("uPD64031A driver");
  43 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
  44 MODULE_LICENSE("GPL");
  45
  46 static int debug = 0;
  47 module_param(debug, int, 0644);
  48
  49 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  50
  51 static unsigned short normal_i2c[] = { 0x24 >> 1, 0x26 >> 1, I2C_CLIENT_END };
  52
  53
  54 I2C_CLIENT_INSMOD;
  55
  56 enum {
  57         R00 = 0, R01, R02, R03, R04,
  58         R05, R06, R07, R08, R09,
  59         R0A, R0B, R0C, R0D, R0E, R0F,
  60         /* unused registers
  61          R10, R11, R12, R13, R14,
  62          R15, R16, R17,
  63          */
  64         TOT_REGS
  65 };
  66
  67 struct upd64031a_state {
  68         u8 regs[TOT_REGS];
  69         u8 gr_mode;
  70         u8 direct_3dycs_connect;
  71         u8 ext_comp_sync;
  72         u8 ext_vert_sync;
  73 };
  74
  75 static u8 upd64031a_init[] = {
  76         0x00, 0xb8, 0x48, 0xd2, 0xe6,
  77         0x03, 0x10, 0x0b, 0xaf, 0x7f,
  78         0x00, 0x00, 0x1d, 0x5e, 0x00,
  79         0xd0
  80 };
  81
  82 /* ------------------------------------------------------------------------ */
  83
  84 static u8 upd64031a_read(struct i2c_client *client, u8 reg)
  85 {
  86         u8 buf[2];
  87
  88         if (reg >= sizeof(buf))
  89                 return 0xff;
  90         i2c_master_recv(client, buf, 2);
  91         return buf[reg];
  92 }
  93
  94 /* ------------------------------------------------------------------------ */
  95
  96 static void upd64031a_write(struct i2c_client *client, u8 reg, u8 val)
  97 {
  98         u8 buf[2];
  99
 100         buf[0] = reg;
 101         buf[1] = val;
 102         v4l_dbg(1, debug, client, "writing reg addr: %02X val: %02X\n", reg, val);
 103         if (i2c_master_send(client, buf, 2) != 2)
 104                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
 105 }
 106
 107 /* ------------------------------------------------------------------------ */
 108
 109 /* The input changed due to new input or channel changed */
 110 static void upd64031a_change(struct i2c_client *client)
 111 {
 112         struct upd64031a_state *state = i2c_get_clientdata(client);
 113         u8 reg = state->regs[R00];
 114
 115         v4l_dbg(1, debug, client, "changed input or channel\n");
 116         upd64031a_write(client, R00, reg | 0x10);
 117         upd64031a_write(client, R00, reg & ~0x10);
 118 }
 119
 120 /* ------------------------------------------------------------------------ */
 121
 122 static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *arg)
 123 {
 124         struct upd64031a_state *state = i2c_get_clientdata(client);
 125         struct v4l2_routing *route = arg;
 126
 127         switch (cmd) {
 128         case VIDIOC_S_FREQUENCY:
 129                 upd64031a_change(client);
 130                 break;
 131
 132         case VIDIOC_INT_G_VIDEO_ROUTING:
 133                 route->input = (state->gr_mode >> 6) |
 134                         (state->direct_3dycs_connect >> 4) |
 135                         (state->ext_comp_sync >> 1) |
 136                         (state->ext_vert_sync >> 2);
 137                 route->output = 0;
 138                 break;
 139
 140         case VIDIOC_INT_S_VIDEO_ROUTING:
 141         {
 142                 u8 r00, r05, r08;
 143
 144                 state->gr_mode = (route->input & 3) << 6;
 145                 state->direct_3dycs_connect = (route->input & 0xc) << 4;
 146                 state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
 147                 state->ext_vert_sync = (route->input & UPD64031A_VERTICAL_EXTERNAL) << 2;
 148                 r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
 149                 r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
 150                         state->ext_comp_sync | state->ext_vert_sync;
 151                 r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
 152                         state->direct_3dycs_connect;
 153                 upd64031a_write(client, R00, r00);
 154                 upd64031a_write(client, R05, r05);
 155                 upd64031a_write(client, R08, r08);
 156                 upd64031a_change(client);
 157                 break;
 158         }
 159
 160         case VIDIOC_LOG_STATUS:
 161                 v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n",
 162                         upd64031a_read(client, 0), upd64031a_read(client, 1));
 163                 break;
 164
 165 #ifdef CONFIG_VIDEO_ADV_DEBUG
 166         case VIDIOC_DBG_G_REGISTER:
 167         case VIDIOC_DBG_S_REGISTER:
 168         {
 169                 struct v4l2_register *reg = arg;
 170
 171                 if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
 172                         return -EINVAL;
 173                 if (!capable(CAP_SYS_ADMIN))
 174                         return -EPERM;
 175                 if (cmd == VIDIOC_DBG_G_REGISTER)
 176                         reg->val = upd64031a_read(client, reg->reg & 0xff);
 177                 else
 178                         upd64031a_write(client, reg->reg & 0xff, reg->val & 0xff);
 179                 break;
 180         }
 181 #endif
 182
 183         case VIDIOC_G_CHIP_IDENT:
 184                 return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64031A, 0);
 185
 186         default:
 187                 break;
 188         }
 189         return 0;
 190 }
 191
 192 /* ------------------------------------------------------------------------ */
 193
 194 /* i2c implementation */
 195
 196 static struct i2c_driver i2c_driver;
 197
 198 static int upd64031a_attach(struct i2c_adapter *adapter, int address, int kind)
 199 {
 200         struct i2c_client *client;
 201         struct upd64031a_state *state;
 202         int i;
 203
 204         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 205                 return 0;
 206
 207         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 208         if (client == NULL) {
 209                 return -ENOMEM;
 210         }
 211
 212         client->addr = address;
 213         client->adapter = adapter;
 214         client->driver = &i2c_driver;
 215         snprintf(client->name, sizeof(client->name) - 1, "uPD64031A");
 216
 217         v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
 218
 219         state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
 220         if (state == NULL) {
 221                 kfree(client);
 222                 return -ENOMEM;
 223         }
 224         i2c_set_clientdata(client, state);
 225         memcpy(state->regs, upd64031a_init, sizeof(state->regs));
 226         state->gr_mode = UPD64031A_GR_ON << 6;
 227         state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
 228         state->ext_comp_sync = state->ext_vert_sync = 0;
 229         for (i = 0; i < TOT_REGS; i++) {
 230                 upd64031a_write(client, i, state->regs[i]);
 231         }
 232
 233         i2c_attach_client(client);
 234
 235         return 0;
 236 }
 237
 238 static int upd64031a_probe(struct i2c_adapter *adapter)
 239 {
 240         if (adapter->class & I2C_CLASS_TV_ANALOG)
 241                 return i2c_probe(adapter, &addr_data, upd64031a_attach);
 242         return 0;
 243 }
 244
 245 static int upd64031a_detach(struct i2c_client *client)
 246 {
 247         int err;
 248
 249         err = i2c_detach_client(client);
 250         if (err)
 251                 return err;
 252
 253         kfree(client);
 254         return 0;
 255 }
 256
 257 /* ----------------------------------------------------------------------- */
 258
 259 /* i2c implementation */
 260 static struct i2c_driver i2c_driver = {
 261         .driver = {
 262                 .name = "upd64031a",
 263         },
 264         .id = I2C_DRIVERID_UPD64031A,
 265         .attach_adapter = upd64031a_probe,
 266         .detach_client  = upd64031a_detach,
 267         .command = upd64031a_command,
 268 };
 269
 270
 271 static int __init upd64031a_init_module(void)
 272 {
 273         return i2c_add_driver(&i2c_driver);
 274 }
 275
 276 static void __exit upd64031a_exit_module(void)
 277 {
 278         i2c_del_driver(&i2c_driver);
 279 }
 280
 281 module_init(upd64031a_init_module);
 282 module_exit(upd64031a_exit_module);