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/module.h>
  25 #include <linux/kernel.h>
  26 #include <linux/i2c.h>
  27 #include <linux/videodev2.h>
  28 #include <linux/slab.h>
  29 #include <media/v4l2-device.h>
  30 #include <media/v4l2-chip-ident.h>
  31 #include <media/upd64031a.h>
  32
  33 /* --------------------- read registers functions define -------------------- */
  34
  35 /* bit masks */
  36 #define GR_MODE_MASK              0xc0
  37 #define DIRECT_3DYCS_CONNECT_MASK 0xc0
  38 #define SYNC_CIRCUIT_MASK         0xa0
  39
  40 /* -------------------------------------------------------------------------- */
  41
  42 MODULE_DESCRIPTION("uPD64031A driver");
  43 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
  44 MODULE_LICENSE("GPL");
  45
  46 static int debug;
  47 module_param(debug, int, 0644);
  48
  49 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  50
  51
  52 enum {
  53         R00 = 0, R01, R02, R03, R04,
  54         R05, R06, R07, R08, R09,
  55         R0A, R0B, R0C, R0D, R0E, R0F,
  56         /* unused registers
  57          R10, R11, R12, R13, R14,
  58          R15, R16, R17,
  59          */
  60         TOT_REGS
  61 };
  62
  63 struct upd64031a_state {
  64         struct v4l2_subdev sd;
  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 inline struct upd64031a_state *to_state(struct v4l2_subdev *sd)
  73 {
  74         return container_of(sd, struct upd64031a_state, sd);
  75 }
  76
  77 static u8 upd64031a_init[] = {
  78         0x00, 0xb8, 0x48, 0xd2, 0xe6,
  79         0x03, 0x10, 0x0b, 0xaf, 0x7f,
  80         0x00, 0x00, 0x1d, 0x5e, 0x00,
  81         0xd0
  82 };
  83
  84 /* ------------------------------------------------------------------------ */
  85
  86 static u8 upd64031a_read(struct v4l2_subdev *sd, u8 reg)
  87 {
  88         struct i2c_client *client = v4l2_get_subdevdata(sd);
  89         u8 buf[2];
  90
  91         if (reg >= sizeof(buf))
  92                 return 0xff;
  93         i2c_master_recv(client, buf, 2);
  94         return buf[reg];
  95 }
  96
  97 /* ------------------------------------------------------------------------ */
  98
  99 static void upd64031a_write(struct v4l2_subdev *sd, u8 reg, u8 val)
 100 {
 101         struct i2c_client *client = v4l2_get_subdevdata(sd);
 102         u8 buf[2];
 103
 104         buf[0] = reg;
 105         buf[1] = val;
 106         v4l2_dbg(1, debug, sd, "write reg: %02X val: %02X\n", reg, val);
 107         if (i2c_master_send(client, buf, 2) != 2)
 108                 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
 109 }
 110
 111 /* ------------------------------------------------------------------------ */
 112
 113 /* The input changed due to new input or channel changed */
 114 static int upd64031a_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *freq)
 115 {
 116         struct upd64031a_state *state = to_state(sd);
 117         u8 reg = state->regs[R00];
 118
 119         v4l2_dbg(1, debug, sd, "changed input or channel\n");
 120         upd64031a_write(sd, R00, reg | 0x10);
 121         upd64031a_write(sd, R00, reg & ~0x10);
 122         return 0;
 123 }
 124
 125 /* ------------------------------------------------------------------------ */
 126
 127 static int upd64031a_s_routing(struct v4l2_subdev *sd,
 128                                u32 input, u32 output, u32 config)
 129 {
 130         struct upd64031a_state *state = to_state(sd);
 131         u8 r00, r05, r08;
 132
 133         state->gr_mode = (input & 3) << 6;
 134         state->direct_3dycs_connect = (input & 0xc) << 4;
 135         state->ext_comp_sync =
 136                 (input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
 137         state->ext_vert_sync =
 138                 (input & UPD64031A_VERTICAL_EXTERNAL) << 2;
 139         r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
 140         r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
 141                 state->ext_comp_sync | state->ext_vert_sync;
 142         r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
 143                 state->direct_3dycs_connect;
 144         upd64031a_write(sd, R00, r00);
 145         upd64031a_write(sd, R05, r05);
 146         upd64031a_write(sd, R08, r08);
 147         return upd64031a_s_frequency(sd, NULL);
 148 }
 149
 150 static int upd64031a_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 151 {
 152         struct i2c_client *client = v4l2_get_subdevdata(sd);
 153
 154         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64031A, 0);
 155 }
 156
 157 static int upd64031a_log_status(struct v4l2_subdev *sd)
 158 {
 159         v4l2_info(sd, "Status: SA00=0x%02x SA01=0x%02x\n",
 160                         upd64031a_read(sd, 0), upd64031a_read(sd, 1));
 161         return 0;
 162 }
 163
 164 #ifdef CONFIG_VIDEO_ADV_DEBUG
 165 static int upd64031a_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
 166 {
 167         struct i2c_client *client = v4l2_get_subdevdata(sd);
 168
 169         if (!v4l2_chip_match_i2c_client(client, &reg->match))
 170                 return -EINVAL;
 171         if (!capable(CAP_SYS_ADMIN))
 172                 return -EPERM;
 173         reg->val = upd64031a_read(sd, reg->reg & 0xff);
 174         reg->size = 1;
 175         return 0;
 176 }
 177
 178 static int upd64031a_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
 179 {
 180         struct i2c_client *client = v4l2_get_subdevdata(sd);
 181
 182         if (!v4l2_chip_match_i2c_client(client, &reg->match))
 183                 return -EINVAL;
 184         if (!capable(CAP_SYS_ADMIN))
 185                 return -EPERM;
 186         upd64031a_write(sd, reg->reg & 0xff, reg->val & 0xff);
 187         return 0;
 188 }
 189 #endif
 190
 191 /* ----------------------------------------------------------------------- */
 192
 193 static const struct v4l2_subdev_core_ops upd64031a_core_ops = {
 194         .log_status = upd64031a_log_status,
 195         .g_chip_ident = upd64031a_g_chip_ident,
 196 #ifdef CONFIG_VIDEO_ADV_DEBUG
 197         .g_register = upd64031a_g_register,
 198         .s_register = upd64031a_s_register,
 199 #endif
 200 };
 201
 202 static const struct v4l2_subdev_tuner_ops upd64031a_tuner_ops = {
 203         .s_frequency = upd64031a_s_frequency,
 204 };
 205
 206 static const struct v4l2_subdev_video_ops upd64031a_video_ops = {
 207         .s_routing = upd64031a_s_routing,
 208 };
 209
 210 static const struct v4l2_subdev_ops upd64031a_ops = {
 211         .core = &upd64031a_core_ops,
 212         .tuner = &upd64031a_tuner_ops,
 213         .video = &upd64031a_video_ops,
 214 };
 215
 216 /* ------------------------------------------------------------------------ */
 217
 218 /* i2c implementation */
 219
 220 static int upd64031a_probe(struct i2c_client *client,
 221                            const struct i2c_device_id *id)
 222 {
 223         struct upd64031a_state *state;
 224         struct v4l2_subdev *sd;
 225         int i;
 226
 227         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 228                 return -EIO;
 229
 230         v4l_info(client, "chip found @ 0x%x (%s)\n",
 231                         client->addr << 1, client->adapter->name);
 232
 233         state = kzalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
 234         if (state == NULL)
 235                 return -ENOMEM;
 236         sd = &state->sd;
 237         v4l2_i2c_subdev_init(sd, client, &upd64031a_ops);
 238         memcpy(state->regs, upd64031a_init, sizeof(state->regs));
 239         state->gr_mode = UPD64031A_GR_ON << 6;
 240         state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
 241         state->ext_comp_sync = state->ext_vert_sync = 0;
 242         for (i = 0; i < TOT_REGS; i++)
 243                 upd64031a_write(sd, i, state->regs[i]);
 244         return 0;
 245 }
 246
 247 static int upd64031a_remove(struct i2c_client *client)
 248 {
 249         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 250
 251         v4l2_device_unregister_subdev(sd);
 252         kfree(to_state(sd));
 253         return 0;
 254 }
 255
 256 /* ----------------------------------------------------------------------- */
 257
 258 static const struct i2c_device_id upd64031a_id[] = {
 259         { "upd64031a", 0 },
 260         { }
 261 };
 262 MODULE_DEVICE_TABLE(i2c, upd64031a_id);
 263
 264 static struct i2c_driver upd64031a_driver = {
 265         .driver = {
 266                 .owner  = THIS_MODULE,
 267                 .name   = "upd64031a",
 268         },
 269         .probe          = upd64031a_probe,
 270         .remove         = upd64031a_remove,
 271         .id_table       = upd64031a_id,
 272 };
 273
 274 static __init int init_upd64031a(void)
 275 {
 276         return i2c_add_driver(&upd64031a_driver);
 277 }
 278
 279 static __exit void exit_upd64031a(void)
 280 {
 281         i2c_del_driver(&upd64031a_driver);
 282 }
 283
 284 module_init(init_upd64031a);
 285 module_exit(exit_upd64031a);