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/upd64031a.h>
  31
  32 // --------------------- read registers functions define -----------------------
  33
  34 /* bit masks */
  35 #define GR_MODE_MASK              0xc0
  36 #define DIRECT_3DYCS_CONNECT_MASK 0xc0
  37 #define SYNC_CIRCUIT_MASK         0xa0
  38
  39 // -----------------------------------------------------------------------------
  40
  41 MODULE_DESCRIPTION("uPD64031A driver");
  42 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
  43 MODULE_LICENSE("GPL");
  44
  45 static int debug = 0;
  46 module_param(debug, int, 0644);
  47
  48 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  49
  50 static unsigned short normal_i2c[] = { 0x24 >> 1, 0x26 >> 1, I2C_CLIENT_END };
  51
  52
  53 I2C_CLIENT_INSMOD;
  54
  55 enum {
  56         R00 = 0, R01, R02, R03, R04,
  57         R05, R06, R07, R08, R09,
  58         R0A, R0B, R0C, R0D, R0E, R0F,
  59         /* unused registers
  60          R10, R11, R12, R13, R14,
  61          R15, R16, R17,
  62          */
  63         TOT_REGS
  64 };
  65
  66 struct upd64031a_state {
  67         u8 regs[TOT_REGS];
  68         u8 gr_mode;
  69         u8 direct_3dycs_connect;
  70         u8 ext_comp_sync;
  71         u8 ext_vert_sync;
  72 };
  73
  74 static u8 upd64031a_init[] = {
  75         0x00, 0xb8, 0x48, 0xd2, 0xe6,
  76         0x03, 0x10, 0x0b, 0xaf, 0x7f,
  77         0x00, 0x00, 0x1d, 0x5e, 0x00,
  78         0xd0
  79 };
  80
  81 /* ------------------------------------------------------------------------ */
  82
  83 static u8 upd64031a_read(struct i2c_client *client, u8 reg)
  84 {
  85         u8 buf[2];
  86
  87         if (reg >= sizeof(buf))
  88                 return 0xff;
  89         i2c_master_recv(client, buf, 2);
  90         return buf[reg];
  91 }
  92
  93 /* ------------------------------------------------------------------------ */
  94
  95 static void upd64031a_write(struct i2c_client *client, u8 reg, u8 val)
  96 {
  97         u8 buf[2];
  98
  99         buf[0] = reg;
 100         buf[1] = val;
 101         v4l_dbg(1, debug, client, "writing reg addr: %02X val: %02X\n", reg, val);
 102         if (i2c_master_send(client, buf, 2) != 2)
 103                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
 104 }
 105
 106 /* ------------------------------------------------------------------------ */
 107
 108 /* The input changed due to new input or channel changed */
 109 static void upd64031a_change(struct i2c_client *client)
 110 {
 111         struct upd64031a_state *state = i2c_get_clientdata(client);
 112         u8 reg = state->regs[R00];
 113
 114         v4l_dbg(1, debug, client, "changed input or channel\n");
 115         upd64031a_write(client, R00, reg | 0x10);
 116         upd64031a_write(client, R00, reg & ~0x10);
 117 }
 118
 119 /* ------------------------------------------------------------------------ */
 120
 121 static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *arg)
 122 {
 123         struct upd64031a_state *state = i2c_get_clientdata(client);
 124         struct v4l2_routing *route = arg;
 125
 126         switch (cmd) {
 127         case VIDIOC_S_FREQUENCY:
 128                 upd64031a_change(client);
 129                 break;
 130
 131         case VIDIOC_INT_G_VIDEO_ROUTING:
 132                 route->input = (state->gr_mode >> 6) |
 133                         (state->direct_3dycs_connect >> 4) |
 134                         (state->ext_comp_sync >> 1) |
 135                         (state->ext_vert_sync >> 2);
 136                 route->output = 0;
 137                 break;
 138
 139         case VIDIOC_INT_S_VIDEO_ROUTING:
 140         {
 141                 u8 r00, r05, r08;
 142
 143                 state->gr_mode = (route->input & 3) << 6;
 144                 state->direct_3dycs_connect = (route->input & 0xc) << 4;
 145                 state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
 146                 state->ext_vert_sync = (route->input & UPD64031A_VERTICAL_EXTERNAL) << 2;
 147                 r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
 148                 r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
 149                         state->ext_comp_sync | state->ext_vert_sync;
 150                 r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
 151                         state->direct_3dycs_connect;
 152                 upd64031a_write(client, R00, r00);
 153                 upd64031a_write(client, R05, r05);
 154                 upd64031a_write(client, R08, r08);
 155                 upd64031a_change(client);
 156                 break;
 157         }
 158
 159         case VIDIOC_LOG_STATUS:
 160                 v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n",
 161                         upd64031a_read(client, 0), upd64031a_read(client, 1));
 162                 break;
 163
 164 #ifdef CONFIG_VIDEO_ADV_DEBUG
 165         case VIDIOC_INT_G_REGISTER:
 166         {
 167                 struct v4l2_register *reg = arg;
 168
 169                 if (reg->i2c_id != I2C_DRIVERID_UPD64031A)
 170                         return -EINVAL;
 171                 reg->val = upd64031a_read(client, reg->reg & 0xff);
 172                 break;
 173         }
 174
 175         case VIDIOC_INT_S_REGISTER:
 176         {
 177                 struct v4l2_register *reg = arg;
 178                 u8 addr = reg->reg & 0xff;
 179                 u8 val = reg->val & 0xff;
 180
 181                 if (reg->i2c_id != I2C_DRIVERID_UPD64031A)
 182                         return -EINVAL;
 183                 if (!capable(CAP_SYS_ADMIN))
 184                         return -EPERM;
 185                 upd64031a_write(client, addr, val);
 186                 break;
 187         }
 188 #endif
 189
 190         default:
 191                 break;
 192         }
 193         return 0;
 194 }
 195
 196 /* ------------------------------------------------------------------------ */
 197
 198 /* i2c implementation */
 199
 200 static struct i2c_driver i2c_driver;
 201
 202 static int upd64031a_attach(struct i2c_adapter *adapter, int address, int kind)
 203 {
 204         struct i2c_client *client;
 205         struct upd64031a_state *state;
 206         int i;
 207
 208         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 209                 return 0;
 210
 211         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 212         if (client == NULL) {
 213                 return -ENOMEM;
 214         }
 215
 216         client->addr = address;
 217         client->adapter = adapter;
 218         client->driver = &i2c_driver;
 219         snprintf(client->name, sizeof(client->name) - 1, "uPD64031A");
 220
 221         v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
 222
 223         state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
 224         if (state == NULL) {
 225                 kfree(client);
 226                 return -ENOMEM;
 227         }
 228         i2c_set_clientdata(client, state);
 229         memcpy(state->regs, upd64031a_init, sizeof(state->regs));
 230         state->gr_mode = UPD64031A_GR_ON << 6;
 231         state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
 232         state->ext_comp_sync = state->ext_vert_sync = 0;
 233         for (i = 0; i < TOT_REGS; i++) {
 234                 upd64031a_write(client, i, state->regs[i]);
 235         }
 236
 237         i2c_attach_client(client);
 238
 239         return 0;
 240 }
 241
 242 static int upd64031a_probe(struct i2c_adapter *adapter)
 243 {
 244         if (adapter->class & I2C_CLASS_TV_ANALOG)
 245                 return i2c_probe(adapter, &addr_data, upd64031a_attach);
 246         return 0;
 247 }
 248
 249 static int upd64031a_detach(struct i2c_client *client)
 250 {
 251         int err;
 252
 253         err = i2c_detach_client(client);
 254         if (err)
 255                 return err;
 256
 257         kfree(client);
 258         return 0;
 259 }
 260
 261 /* ----------------------------------------------------------------------- */
 262
 263 /* i2c implementation */
 264 static struct i2c_driver i2c_driver = {
 265         .driver = {
 266                 .name = "upd64031a",
 267         },
 268         .id = I2C_DRIVERID_UPD64031A,
 269         .attach_adapter = upd64031a_probe,
 270         .detach_client  = upd64031a_detach,
 271         .command = upd64031a_command,
 272 };
 273
 274
 275 static int __init upd64031a_init_module(void)
 276 {
 277         return i2c_add_driver(&i2c_driver);
 278 }
 279
 280 static void __exit upd64031a_exit_module(void)
 281 {
 282         i2c_del_driver(&i2c_driver);
 283 }
 284
 285 module_init(upd64031a_init_module);
 286 module_exit(upd64031a_exit_module);