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/upd64083.h>
  30
  31 MODULE_DESCRIPTION("uPD64083 driver");
  32 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
  33 MODULE_LICENSE("GPL");
  34
  35 static int debug = 0;
  36 module_param(debug, bool, 0644);
  37
  38 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  39
  40 static unsigned short normal_i2c[] = { 0xb8 >> 1, 0xba >> 1, I2C_CLIENT_END };
  41
  42
  43 I2C_CLIENT_INSMOD;
  44
  45 enum {
  46         R00 = 0, R01, R02, R03, R04,
  47         R05, R06, R07, R08, R09,
  48         R0A, R0B, R0C, R0D, R0E, R0F,
  49         R10, R11, R12, R13, R14,
  50         R15, R16,
  51         TOT_REGS
  52 };
  53
  54 struct upd64083_state {
  55         u8 mode;
  56         u8 ext_y_adc;
  57         u8 regs[TOT_REGS];
  58 };
  59
  60 /* Initial values when used in combination with the
  61    NEC upd64031a ghost reduction chip. */
  62 static u8 upd64083_init[] = {
  63         0x1f, 0x01, 0xa0, 0x2d, 0x29,  /* we use EXCSS=0 */
  64         0x36, 0xdd, 0x05, 0x56, 0x48,
  65         0x00, 0x3a, 0xa0, 0x05, 0x08,
  66         0x44, 0x60, 0x08, 0x52, 0xf8,
  67         0x53, 0x60, 0x10
  68 };
  69
  70 /* ------------------------------------------------------------------------ */
  71
  72 static void upd64083_log_status(struct i2c_client *client)
  73 {
  74         u8 buf[7];
  75
  76         i2c_master_recv(client, buf, 7);
  77         v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
  78                       "SA04=%02x SA05=%02x SA06=%02x\n",
  79                 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
  80 }
  81
  82 /* ------------------------------------------------------------------------ */
  83
  84 static void upd64083_write(struct i2c_client *client, u8 reg, u8 val)
  85 {
  86         u8 buf[2];
  87
  88         buf[0] = reg;
  89         buf[1] = val;
  90         v4l_dbg(1, debug, client, "writing reg addr: %02x val: %02x\n", reg, val);
  91         if (i2c_master_send(client, buf, 2) != 2)
  92                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
  93 }
  94
  95 /* ------------------------------------------------------------------------ */
  96
  97 #ifdef CONFIG_VIDEO_ADV_DEBUG
  98 static u8 upd64083_read(struct i2c_client *client, u8 reg)
  99 {
 100         u8 buf[7];
 101
 102         if (reg >= sizeof(buf))
 103                 return 0xff;
 104         i2c_master_recv(client, buf, sizeof(buf));
 105         return buf[reg];
 106 }
 107 #endif
 108
 109 /* ------------------------------------------------------------------------ */
 110
 111 static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *arg)
 112 {
 113         struct upd64083_state *state = i2c_get_clientdata(client);
 114         struct v4l2_routing *route = arg;
 115
 116         switch (cmd) {
 117         case VIDIOC_INT_G_VIDEO_ROUTING:
 118                 route->input = (state->mode >> 6) | (state->ext_y_adc >> 3);
 119                 route->output = 0;
 120                 break;
 121
 122         case VIDIOC_INT_S_VIDEO_ROUTING:
 123         {
 124                 u8 r00, r02;
 125
 126                 if (route->input > 7 || (route->input & 6) == 6)
 127                         return -EINVAL;
 128                 state->mode = (route->input & 3) << 6;
 129                 state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
 130                 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
 131                 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
 132                 upd64083_write(client, R00, r00);
 133                 upd64083_write(client, R02, r02);
 134                 break;
 135         }
 136
 137         case VIDIOC_LOG_STATUS:
 138                 upd64083_log_status(client);
 139                 break;
 140
 141 #ifdef CONFIG_VIDEO_ADV_DEBUG
 142         case VIDIOC_INT_G_REGISTER:
 143         {
 144                 struct v4l2_register *reg = arg;
 145
 146                 if (reg->i2c_id != I2C_DRIVERID_UPD64083)
 147                         return -EINVAL;
 148                 reg->val = upd64083_read(client, reg->reg & 0xff);
 149                 break;
 150         }
 151
 152         case VIDIOC_INT_S_REGISTER:
 153         {
 154                 struct v4l2_register *reg = arg;
 155                 u8 addr = reg->reg & 0xff;
 156                 u8 val = reg->val & 0xff;
 157
 158                 if (reg->i2c_id != I2C_DRIVERID_UPD64083)
 159                         return -EINVAL;
 160                 if (!capable(CAP_SYS_ADMIN))
 161                         return -EPERM;
 162                 upd64083_write(client, addr, val);
 163                 break;
 164         }
 165 #endif
 166         default:
 167                 break;
 168         }
 169
 170         return 0;
 171 }
 172
 173 /* ------------------------------------------------------------------------ */
 174
 175 /* i2c implementation */
 176
 177 static struct i2c_driver i2c_driver;
 178
 179 static int upd64083_attach(struct i2c_adapter *adapter, int address, int kind)
 180 {
 181         struct i2c_client *client;
 182         struct upd64083_state *state;
 183         int i;
 184
 185         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 186                 return 0;
 187
 188         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 189         if (client == NULL) {
 190                 return -ENOMEM;
 191         }
 192
 193         client->addr = address;
 194         client->adapter = adapter;
 195         client->driver = &i2c_driver;
 196         snprintf(client->name, sizeof(client->name) - 1, "uPD64083");
 197
 198         v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
 199
 200         state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
 201         if (state == NULL) {
 202                 kfree(client);
 203                 return -ENOMEM;
 204         }
 205         i2c_set_clientdata(client, state);
 206         /* Initially assume that a ghost reduction chip is present */
 207         state->mode = 0;  /* YCS mode */
 208         state->ext_y_adc = (1 << 5);
 209         memcpy(state->regs, upd64083_init, TOT_REGS);
 210         for (i = 0; i < TOT_REGS; i++) {
 211                 upd64083_write(client, i, state->regs[i]);
 212         }
 213         i2c_attach_client(client);
 214
 215         return 0;
 216 }
 217
 218 static int upd64083_probe(struct i2c_adapter *adapter)
 219 {
 220         if (adapter->class & I2C_CLASS_TV_ANALOG)
 221                 return i2c_probe(adapter, &addr_data, upd64083_attach);
 222         return 0;
 223 }
 224
 225 static int upd64083_detach(struct i2c_client *client)
 226 {
 227         int err;
 228
 229         err = i2c_detach_client(client);
 230         if (err)
 231                 return err;
 232
 233         kfree(client);
 234         return 0;
 235 }
 236
 237 /* ----------------------------------------------------------------------- */
 238
 239 /* i2c implementation */
 240 static struct i2c_driver i2c_driver = {
 241         .driver = {
 242                 .name = "upd64083",
 243         },
 244         .id = I2C_DRIVERID_UPD64083,
 245         .attach_adapter = upd64083_probe,
 246         .detach_client  = upd64083_detach,
 247         .command = upd64083_command,
 248 };
 249
 250
 251 static int __init upd64083_init_module(void)
 252 {
 253         return i2c_add_driver(&i2c_driver);
 254 }
 255
 256 static void __exit upd64083_exit_module(void)
 257 {
 258         i2c_del_driver(&i2c_driver);
 259 }
 260
 261 module_init(upd64083_init_module);
 262 module_exit(upd64083_exit_module);