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/v4l2-i2c-drv-legacy.h>
  31 #include <media/upd64083.h>
  32
  33 MODULE_DESCRIPTION("uPD64083 driver");
  34 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
  35 MODULE_LICENSE("GPL");
  36
  37 static int debug = 0;
  38 module_param(debug, bool, 0644);
  39
  40 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  41
  42
  43 enum {
  44         R00 = 0, R01, R02, R03, R04,
  45         R05, R06, R07, R08, R09,
  46         R0A, R0B, R0C, R0D, R0E, R0F,
  47         R10, R11, R12, R13, R14,
  48         R15, R16,
  49         TOT_REGS
  50 };
  51
  52 struct upd64083_state {
  53         u8 mode;
  54         u8 ext_y_adc;
  55         u8 regs[TOT_REGS];
  56 };
  57
  58 /* Initial values when used in combination with the
  59    NEC upd64031a ghost reduction chip. */
  60 static u8 upd64083_init[] = {
  61         0x1f, 0x01, 0xa0, 0x2d, 0x29,  /* we use EXCSS=0 */
  62         0x36, 0xdd, 0x05, 0x56, 0x48,
  63         0x00, 0x3a, 0xa0, 0x05, 0x08,
  64         0x44, 0x60, 0x08, 0x52, 0xf8,
  65         0x53, 0x60, 0x10
  66 };
  67
  68 /* ------------------------------------------------------------------------ */
  69
  70 static void upd64083_log_status(struct i2c_client *client)
  71 {
  72         u8 buf[7];
  73
  74         i2c_master_recv(client, buf, 7);
  75         v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
  76                       "SA04=%02x SA05=%02x SA06=%02x\n",
  77                 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
  78 }
  79
  80 /* ------------------------------------------------------------------------ */
  81
  82 static void upd64083_write(struct i2c_client *client, u8 reg, u8 val)
  83 {
  84         u8 buf[2];
  85
  86         buf[0] = reg;
  87         buf[1] = val;
  88         v4l_dbg(1, debug, client, "writing reg addr: %02x val: %02x\n", reg, val);
  89         if (i2c_master_send(client, buf, 2) != 2)
  90                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
  91 }
  92
  93 /* ------------------------------------------------------------------------ */
  94
  95 #ifdef CONFIG_VIDEO_ADV_DEBUG
  96 static u8 upd64083_read(struct i2c_client *client, u8 reg)
  97 {
  98         u8 buf[7];
  99
 100         if (reg >= sizeof(buf))
 101                 return 0xff;
 102         i2c_master_recv(client, buf, sizeof(buf));
 103         return buf[reg];
 104 }
 105 #endif
 106
 107 /* ------------------------------------------------------------------------ */
 108
 109 static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *arg)
 110 {
 111         struct upd64083_state *state = i2c_get_clientdata(client);
 112         struct v4l2_routing *route = arg;
 113
 114         switch (cmd) {
 115         case VIDIOC_INT_G_VIDEO_ROUTING:
 116                 route->input = (state->mode >> 6) | (state->ext_y_adc >> 3);
 117                 route->output = 0;
 118                 break;
 119
 120         case VIDIOC_INT_S_VIDEO_ROUTING:
 121         {
 122                 u8 r00, r02;
 123
 124                 if (route->input > 7 || (route->input & 6) == 6)
 125                         return -EINVAL;
 126                 state->mode = (route->input & 3) << 6;
 127                 state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
 128                 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
 129                 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
 130                 upd64083_write(client, R00, r00);
 131                 upd64083_write(client, R02, r02);
 132                 break;
 133         }
 134
 135         case VIDIOC_LOG_STATUS:
 136                 upd64083_log_status(client);
 137                 break;
 138
 139 #ifdef CONFIG_VIDEO_ADV_DEBUG
 140         case VIDIOC_DBG_G_REGISTER:
 141         case VIDIOC_DBG_S_REGISTER:
 142         {
 143                 struct v4l2_register *reg = arg;
 144
 145                 if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
 146                         return -EINVAL;
 147                 if (!capable(CAP_SYS_ADMIN))
 148                         return -EPERM;
 149                 if (cmd == VIDIOC_DBG_G_REGISTER)
 150                         reg->val = upd64083_read(client, reg->reg & 0xff);
 151                 else
 152                         upd64083_write(client, reg->reg & 0xff, reg->val & 0xff);
 153                 break;
 154         }
 155 #endif
 156
 157         case VIDIOC_G_CHIP_IDENT:
 158                 return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64083, 0);
 159
 160         default:
 161                 break;
 162         }
 163
 164         return 0;
 165 }
 166
 167 /* ------------------------------------------------------------------------ */
 168
 169 /* i2c implementation */
 170
 171 static int upd64083_probe(struct i2c_client *client)
 172 {
 173         struct upd64083_state *state;
 174         int i;
 175
 176         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 177                 return -EIO;
 178
 179         v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name);
 180
 181         state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
 182         if (state == NULL) {
 183                 return -ENOMEM;
 184         }
 185         i2c_set_clientdata(client, state);
 186         /* Initially assume that a ghost reduction chip is present */
 187         state->mode = 0;  /* YCS mode */
 188         state->ext_y_adc = (1 << 5);
 189         memcpy(state->regs, upd64083_init, TOT_REGS);
 190         for (i = 0; i < TOT_REGS; i++) {
 191                 upd64083_write(client, i, state->regs[i]);
 192         }
 193         return 0;
 194 }
 195
 196 static int upd64083_remove(struct i2c_client *client)
 197 {
 198         kfree(i2c_get_clientdata(client));
 199         return 0;
 200 }
 201
 202 /* ----------------------------------------------------------------------- */
 203
 204
 205 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 206         .name = "upd64083",
 207         .driverid = I2C_DRIVERID_UPD64083,
 208         .command = upd64083_command,
 209         .probe = upd64083_probe,
 210         .remove = upd64083_remove,
 211 };