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
  21  * 02110-1301, USA.
  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/v4l2-i2c-drv.h>
  32 #include <media/upd64083.h>
  33
  34 MODULE_DESCRIPTION("uPD64083 driver");
  35 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
  36 MODULE_LICENSE("GPL");
  37
  38 static int debug;
  39 module_param(debug, bool, 0644);
  40
  41 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  42
  43
  44 enum {
  45         R00 = 0, R01, R02, R03, R04,
  46         R05, R06, R07, R08, R09,
  47         R0A, R0B, R0C, R0D, R0E, R0F,
  48         R10, R11, R12, R13, R14,
  49         R15, R16,
  50         TOT_REGS
  51 };
  52
  53 struct upd64083_state {
  54         u8 mode;
  55         u8 ext_y_adc;
  56         u8 regs[TOT_REGS];
  57 };
  58
  59 /* Initial values when used in combination with the
  60    NEC upd64031a ghost reduction chip. */
  61 static u8 upd64083_init[] = {
  62         0x1f, 0x01, 0xa0, 0x2d, 0x29,  /* we use EXCSS=0 */
  63         0x36, 0xdd, 0x05, 0x56, 0x48,
  64         0x00, 0x3a, 0xa0, 0x05, 0x08,
  65         0x44, 0x60, 0x08, 0x52, 0xf8,
  66         0x53, 0x60, 0x10
  67 };
  68
  69 /* ------------------------------------------------------------------------ */
  70
  71 static void upd64083_log_status(struct i2c_client *client)
  72 {
  73         u8 buf[7];
  74
  75         i2c_master_recv(client, buf, 7);
  76         v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
  77                       "SA04=%02x SA05=%02x SA06=%02x\n",
  78                 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
  79 }
  80
  81 /* ------------------------------------------------------------------------ */
  82
  83 static void upd64083_write(struct i2c_client *client, u8 reg, u8 val)
  84 {
  85         u8 buf[2];
  86
  87         buf[0] = reg;
  88         buf[1] = val;
  89         v4l_dbg(1, debug, client, "write reg: %02x val: %02x\n", reg, val);
  90         if (i2c_master_send(client, buf, 2) != 2)
  91                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
  92 }
  93
  94 /* ------------------------------------------------------------------------ */
  95
  96 #ifdef CONFIG_VIDEO_ADV_DEBUG
  97 static u8 upd64083_read(struct i2c_client *client, u8 reg)
  98 {
  99         u8 buf[7];
 100
 101         if (reg >= sizeof(buf))
 102                 return 0xff;
 103         i2c_master_recv(client, buf, sizeof(buf));
 104         return buf[reg];
 105 }
 106 #endif
 107
 108 /* ------------------------------------------------------------------------ */
 109
 110 static int upd64083_command(struct i2c_client *client, unsigned cmd, void *arg)
 111 {
 112         struct upd64083_state *state = i2c_get_clientdata(client);
 113         struct v4l2_routing *route = arg;
 114
 115         switch (cmd) {
 116         case VIDIOC_INT_G_VIDEO_ROUTING:
 117                 route->input = (state->mode >> 6) | (state->ext_y_adc >> 3);
 118                 route->output = 0;
 119                 break;
 120
 121         case VIDIOC_INT_S_VIDEO_ROUTING:
 122         {
 123                 u8 r00, r02;
 124
 125                 if (route->input > 7 || (route->input & 6) == 6)
 126                         return -EINVAL;
 127                 state->mode = (route->input & 3) << 6;
 128                 state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
 129                 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
 130                 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
 131                 upd64083_write(client, R00, r00);
 132                 upd64083_write(client, R02, r02);
 133                 break;
 134         }
 135
 136         case VIDIOC_LOG_STATUS:
 137                 upd64083_log_status(client);
 138                 break;
 139
 140 #ifdef CONFIG_VIDEO_ADV_DEBUG
 141         case VIDIOC_DBG_G_REGISTER:
 142         case VIDIOC_DBG_S_REGISTER:
 143         {
 144                 struct v4l2_register *reg = arg;
 145
 146                 if (!v4l2_chip_match_i2c_client(client,
 147                                 reg->match_type, reg->match_chip))
 148                         return -EINVAL;
 149                 if (!capable(CAP_SYS_ADMIN))
 150                         return -EPERM;
 151                 if (cmd == VIDIOC_DBG_G_REGISTER) {
 152                         reg->val = upd64083_read(client, reg->reg & 0xff);
 153                         break;
 154                 }
 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,
 162                                 V4L2_IDENT_UPD64083, 0);
 163
 164         default:
 165                 break;
 166         }
 167
 168         return 0;
 169 }
 170
 171 /* ------------------------------------------------------------------------ */
 172
 173 /* i2c implementation */
 174
 175 static int upd64083_probe(struct i2c_client *client)
 176 {
 177         struct upd64083_state *state;
 178         int i;
 179
 180         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 181                 return -EIO;
 182
 183         v4l_info(client, "chip found @ 0x%x (%s)\n",
 184                         client->addr << 1, client->adapter->name);
 185
 186         state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
 187         if (state == NULL)
 188                 return -ENOMEM;
 189         i2c_set_clientdata(client, state);
 190         /* Initially assume that a ghost reduction chip is present */
 191         state->mode = 0;  /* YCS mode */
 192         state->ext_y_adc = (1 << 5);
 193         memcpy(state->regs, upd64083_init, TOT_REGS);
 194         for (i = 0; i < TOT_REGS; i++)
 195                 upd64083_write(client, i, state->regs[i]);
 196         return 0;
 197 }
 198
 199 static int upd64083_remove(struct i2c_client *client)
 200 {
 201         kfree(i2c_get_clientdata(client));
 202         return 0;
 203 }
 204
 205 /* ----------------------------------------------------------------------- */
 206
 207
 208 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 209         .name = "upd64083",
 210         .driverid = I2C_DRIVERID_UPD64083,
 211         .command = upd64083_command,
 212         .probe = upd64083_probe,
 213         .remove = upd64083_remove,
 214 };