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/v4l2-chip-ident.h>
  31 #include <media/v4l2-i2c-drv.h>
  32 #include <media/upd64031a.h>
  33
  34 /* --------------------- read registers functions define -------------------- */
  35
  36 /* bit masks */
  37 #define GR_MODE_MASK              0xc0
  38 #define DIRECT_3DYCS_CONNECT_MASK 0xc0
  39 #define SYNC_CIRCUIT_MASK         0xa0
  40
  41 /* -------------------------------------------------------------------------- */
  42
  43 MODULE_DESCRIPTION("uPD64031A driver");
  44 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
  45 MODULE_LICENSE("GPL");
  46
  47 static int debug;
  48 module_param(debug, int, 0644);
  49
  50 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  51
  52
  53 enum {
  54         R00 = 0, R01, R02, R03, R04,
  55         R05, R06, R07, R08, R09,
  56         R0A, R0B, R0C, R0D, R0E, R0F,
  57         /* unused registers
  58          R10, R11, R12, R13, R14,
  59          R15, R16, R17,
  60          */
  61         TOT_REGS
  62 };
  63
  64 struct upd64031a_state {
  65         u8 regs[TOT_REGS];
  66         u8 gr_mode;
  67         u8 direct_3dycs_connect;
  68         u8 ext_comp_sync;
  69         u8 ext_vert_sync;
  70 };
  71
  72 static u8 upd64031a_init[] = {
  73         0x00, 0xb8, 0x48, 0xd2, 0xe6,
  74         0x03, 0x10, 0x0b, 0xaf, 0x7f,
  75         0x00, 0x00, 0x1d, 0x5e, 0x00,
  76         0xd0
  77 };
  78
  79 /* ------------------------------------------------------------------------ */
  80
  81 static u8 upd64031a_read(struct i2c_client *client, u8 reg)
  82 {
  83         u8 buf[2];
  84
  85         if (reg >= sizeof(buf))
  86                 return 0xff;
  87         i2c_master_recv(client, buf, 2);
  88         return buf[reg];
  89 }
  90
  91 /* ------------------------------------------------------------------------ */
  92
  93 static void upd64031a_write(struct i2c_client *client, u8 reg, u8 val)
  94 {
  95         u8 buf[2];
  96
  97         buf[0] = reg;
  98         buf[1] = val;
  99         v4l_dbg(1, debug, client, "write reg: %02X val: %02X\n", reg, val);
 100         if (i2c_master_send(client, buf, 2) != 2)
 101                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
 102 }
 103
 104 /* ------------------------------------------------------------------------ */
 105
 106 /* The input changed due to new input or channel changed */
 107 static void upd64031a_change(struct i2c_client *client)
 108 {
 109         struct upd64031a_state *state = i2c_get_clientdata(client);
 110         u8 reg = state->regs[R00];
 111
 112         v4l_dbg(1, debug, client, "changed input or channel\n");
 113         upd64031a_write(client, R00, reg | 0x10);
 114         upd64031a_write(client, R00, reg & ~0x10);
 115 }
 116
 117 /* ------------------------------------------------------------------------ */
 118
 119 static int upd64031a_command(struct i2c_client *client, unsigned cmd, void *arg)
 120 {
 121         struct upd64031a_state *state = i2c_get_clientdata(client);
 122         struct v4l2_routing *route = arg;
 123
 124         switch (cmd) {
 125         case VIDIOC_S_FREQUENCY:
 126                 upd64031a_change(client);
 127                 break;
 128
 129         case VIDIOC_INT_G_VIDEO_ROUTING:
 130                 route->input = (state->gr_mode >> 6) |
 131                         (state->direct_3dycs_connect >> 4) |
 132                         (state->ext_comp_sync >> 1) |
 133                         (state->ext_vert_sync >> 2);
 134                 route->output = 0;
 135                 break;
 136
 137         case VIDIOC_INT_S_VIDEO_ROUTING:
 138         {
 139                 u8 r00, r05, r08;
 140
 141                 state->gr_mode = (route->input & 3) << 6;
 142                 state->direct_3dycs_connect = (route->input & 0xc) << 4;
 143                 state->ext_comp_sync =
 144                         (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
 145                 state->ext_vert_sync =
 146                         (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_DBG_G_REGISTER:
 166         case VIDIOC_DBG_S_REGISTER:
 167         {
 168                 struct v4l2_register *reg = arg;
 169
 170                 if (!v4l2_chip_match_i2c_client(client,
 171                                         reg->match_type, reg->match_chip))
 172                         return -EINVAL;
 173                 if (!capable(CAP_SYS_ADMIN))
 174                         return -EPERM;
 175                 if (cmd == VIDIOC_DBG_G_REGISTER) {
 176                         reg->val = upd64031a_read(client, reg->reg & 0xff);
 177                         break;
 178                 }
 179                 upd64031a_write(client, reg->reg & 0xff, reg->val & 0xff);
 180                 break;
 181         }
 182 #endif
 183
 184         case VIDIOC_G_CHIP_IDENT:
 185                 return v4l2_chip_ident_i2c_client(client, arg,
 186                                 V4L2_IDENT_UPD64031A, 0);
 187
 188         default:
 189                 break;
 190         }
 191         return 0;
 192 }
 193
 194 /* ------------------------------------------------------------------------ */
 195
 196 /* i2c implementation */
 197
 198 static int upd64031a_probe(struct i2c_client *client)
 199 {
 200         struct upd64031a_state *state;
 201         int i;
 202
 203         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 204                 return -EIO;
 205
 206         v4l_info(client, "chip found @ 0x%x (%s)\n",
 207                         client->addr << 1, client->adapter->name);
 208
 209         state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
 210         if (state == NULL)
 211                 return -ENOMEM;
 212         i2c_set_clientdata(client, state);
 213         memcpy(state->regs, upd64031a_init, sizeof(state->regs));
 214         state->gr_mode = UPD64031A_GR_ON << 6;
 215         state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
 216         state->ext_comp_sync = state->ext_vert_sync = 0;
 217         for (i = 0; i < TOT_REGS; i++)
 218                 upd64031a_write(client, i, state->regs[i]);
 219         return 0;
 220 }
 221
 222 static int upd64031a_remove(struct i2c_client *client)
 223 {
 224         kfree(i2c_get_clientdata(client));
 225         return 0;
 226 }
 227
 228 /* ----------------------------------------------------------------------- */
 229
 230
 231 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 232         .name = "upd64031a",
 233         .driverid = I2C_DRIVERID_UPD64031A,
 234         .command = upd64031a_command,
 235         .probe = upd64031a_probe,
 236         .remove = upd64031a_remove,
 237 };