drivers/media/video/upd64083.c

   1 /*
   2  * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
   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
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2
  11  * of the License, or (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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  21  */
  22
  23 #include <linux/version.h>
  24 #include <linux/module.h>
  25 #include <linux/kernel.h>
  26 #include <linux/i2c.h>
  27 #include <linux/videodev2.h>
  28 #include <media/v4l2-common.h>
  29 #include <media/v4l2-chip-ident.h>
  30 #include <media/upd64083.h>
  31
  32 MODULE_DESCRIPTION("uPD64083 driver");
  33 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
  34 MODULE_LICENSE("GPL");
  35
  36 static int debug = 0;
  37 module_param(debug, bool, 0644);
  38
  39 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  40
  41 static unsigned short normal_i2c[] = { 0xb8 >> 1, 0xba >> 1, I2C_CLIENT_END };
  42
  43
  44 I2C_CLIENT_INSMOD;
  45
  46 enum {
  47         R00 = 0, R01, R02, R03, R04,
  48         R05, R06, R07, R08, R09,
  49         R0A, R0B, R0C, R0D, R0E, R0F,
  50         R10, R11, R12, R13, R14,
  51         R15, R16,
  52         TOT_REGS
  53 };
  54
  55 struct upd64083_state {
  56         u8 mode;
  57         u8 ext_y_adc;
  58         u8 regs[TOT_REGS];
  59 };
  60
  61 /* Initial values when used in combination with the
  62    NEC upd64031a ghost reduction chip. */
  63 static u8 upd64083_init[] = {
  64         0x1f, 0x01, 0xa0, 0x2d, 0x29,  /* we use EXCSS=0 */
  65         0x36, 0xdd, 0x05, 0x56, 0x48,
  66         0x00, 0x3a, 0xa0, 0x05, 0x08,
  67         0x44, 0x60, 0x08, 0x52, 0xf8,
  68         0x53, 0x60, 0x10
  69 };
  70
  71 /* ------------------------------------------------------------------------ */
  72
  73 static void upd64083_log_status(struct i2c_client *client)
  74 {
  75         u8 buf[7];
  76
  77         i2c_master_recv(client, buf, 7);
  78         v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
  79                       "SA04=%02x SA05=%02x SA06=%02x\n",
  80                 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
  81 }
  82
  83 /* ------------------------------------------------------------------------ */
  84
  85 static void upd64083_write(struct i2c_client *client, u8 reg, u8 val)
  86 {
  87         u8 buf[2];
  88
  89         buf[0] = reg;
  90         buf[1] = val;
  91         v4l_dbg(1, debug, client, "writing reg addr: %02x val: %02x\n", reg, val);
  92         if (i2c_master_send(client, buf, 2) != 2)
  93                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
  94 }
  95
  96 /* ------------------------------------------------------------------------ */
  97
  98 #ifdef CONFIG_VIDEO_ADV_DEBUG
  99 static u8 upd64083_read(struct i2c_client *client, u8 reg)
 100 {
 101         u8 buf[7];
 102
 103         if (reg >= sizeof(buf))
 104                 return 0xff;
 105         i2c_master_recv(client, buf, sizeof(buf));
 106         return buf[reg];
 107 }
 108 #endif
 109
 110 /* ------------------------------------------------------------------------ */
 111
 112 static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *arg)
 113 {
 114         struct upd64083_state *state = i2c_get_clientdata(client);
 115         struct v4l2_routing *route = arg;
 116
 117         switch (cmd) {
 118         case VIDIOC_INT_G_VIDEO_ROUTING:
 119                 route->input = (state->mode >> 6) | (state->ext_y_adc >> 3);
 120                 route->output = 0;
 121                 break;
 122
 123         case VIDIOC_INT_S_VIDEO_ROUTING:
 124         {
 125                 u8 r00, r02;
 126
 127                 if (route->input > 7 || (route->input & 6) == 6)
 128                         return -EINVAL;
 129                 state->mode = (route->input & 3) << 6;
 130                 state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
 131                 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
 132                 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
 133                 upd64083_write(client, R00, r00);
 134                 upd64083_write(client, R02, r02);
 135                 break;
 136         }
 137
 138         case VIDIOC_LOG_STATUS:
 139                 upd64083_log_status(client);
 140                 break;
 141
 142 #ifdef CONFIG_VIDEO_ADV_DEBUG
 143         case VIDIOC_DBG_G_REGISTER:
 144         case VIDIOC_DBG_S_REGISTER:
 145         {
 146                 struct v4l2_register *reg = arg;
 147
 148                 if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
 149                         return -EINVAL;
 150                 if (!capable(CAP_SYS_ADMIN))
 151                         return -EPERM;
 152                 if (cmd == VIDIOC_DBG_G_REGISTER)
 153                         reg->val = upd64083_read(client, reg->reg & 0xff);
 154                 else
 155                         upd64083_write(client, reg->reg & 0xff, reg->val & 0xff);
 156                 break;
 157         }
 158 #endif
 159
 160         case VIDIOC_G_CHIP_IDENT:
 161                 return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64083, 0);
 162
 163         default:
 164                 break;
 165         }
 166
 167         return 0;
 168 }
 169
 170 /* ------------------------------------------------------------------------ */
 171
 172 /* i2c implementation */
 173
 174 static struct i2c_driver i2c_driver;
 175
 176 static int upd64083_attach(struct i2c_adapter *adapter, int address, int kind)
 177 {
 178         struct i2c_client *client;
 179         struct upd64083_state *state;
 180         int i;
 181
 182         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 183                 return 0;
 184
 185         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 186         if (client == NULL) {
 187                 return -ENOMEM;
 188         }
 189
 190         client->addr = address;
 191         client->adapter = adapter;
 192         client->driver = &i2c_driver;
 193         snprintf(client->name, sizeof(client->name) - 1, "uPD64083");
 194
 195         v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
 196
 197         state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
 198         if (state == NULL) {
 199                 kfree(client);
 200                 return -ENOMEM;
 201         }
 202         i2c_set_clientdata(client, state);
 203         /* Initially assume that a ghost reduction chip is present */
 204         state->mode = 0;  /* YCS mode */
 205         state->ext_y_adc = (1 << 5);
 206         memcpy(state->regs, upd64083_init, TOT_REGS);
 207         for (i = 0; i < TOT_REGS; i++) {
 208                 upd64083_write(client, i, state->regs[i]);
 209         }
 210         i2c_attach_client(client);
 211
 212         return 0;
 213 }
 214
 215 static int upd64083_probe(struct i2c_adapter *adapter)
 216 {
 217         if (adapter->class & I2C_CLASS_TV_ANALOG)
 218                 return i2c_probe(adapter, &addr_data, upd64083_attach);
 219         return 0;
 220 }
 221
 222 static int upd64083_detach(struct i2c_client *client)
 223 {
 224         int err;
 225
 226         err = i2c_detach_client(client);
 227         if (err)
 228                 return err;
 229
 230         kfree(client);
 231         return 0;
 232 }
 233
 234 /* ----------------------------------------------------------------------- */
 235
 236 /* i2c implementation */
 237 static struct i2c_driver i2c_driver = {
 238         .driver = {
 239                 .name = "upd64083",
 240         },
 241         .id = I2C_DRIVERID_UPD64083,
 242         .attach_adapter = upd64083_probe,
 243         .detach_client  = upd64083_detach,
 244         .command = upd64083_command,
 245 };
 246
 247
 248 static int __init upd64083_init_module(void)
 249 {
 250         return i2c_add_driver(&i2c_driver);
 251 }
 252
 253 static void __exit upd64083_exit_module(void)
 254 {
 255         i2c_del_driver(&i2c_driver);
 256 }
 257
 258 module_init(upd64083_init_module);
 259 module_exit(upd64083_exit_module);