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/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         struct v4l2_subdev sd;
  66         u8 regs[TOT_REGS];
  67         u8 gr_mode;
  68         u8 direct_3dycs_connect;
  69         u8 ext_comp_sync;
  70         u8 ext_vert_sync;
  71 };
  72
  73 static inline struct upd64031a_state *to_state(struct v4l2_subdev *sd)
  74 {
  75         return container_of(sd, struct upd64031a_state, sd);
  76 }
  77
  78 static u8 upd64031a_init[] = {
  79         0x00, 0xb8, 0x48, 0xd2, 0xe6,
  80         0x03, 0x10, 0x0b, 0xaf, 0x7f,
  81         0x00, 0x00, 0x1d, 0x5e, 0x00,
  82         0xd0
  83 };
  84
  85 /* ------------------------------------------------------------------------ */
  86
  87 static u8 upd64031a_read(struct v4l2_subdev *sd, u8 reg)
  88 {
  89         struct i2c_client *client = v4l2_get_subdevdata(sd);
  90         u8 buf[2];
  91
  92         if (reg >= sizeof(buf))
  93                 return 0xff;
  94         i2c_master_recv(client, buf, 2);
  95         return buf[reg];
  96 }
  97
  98 /* ------------------------------------------------------------------------ */
  99
 100 static void upd64031a_write(struct v4l2_subdev *sd, u8 reg, u8 val)
 101 {
 102         struct i2c_client *client = v4l2_get_subdevdata(sd);
 103         u8 buf[2];
 104
 105         buf[0] = reg;
 106         buf[1] = val;
 107         v4l2_dbg(1, debug, sd, "write reg: %02X val: %02X\n", reg, val);
 108         if (i2c_master_send(client, buf, 2) != 2)
 109                 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
 110 }
 111
 112 /* ------------------------------------------------------------------------ */
 113
 114 /* The input changed due to new input or channel changed */
 115 static int upd64031a_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *freq)
 116 {
 117         struct upd64031a_state *state = to_state(sd);
 118         u8 reg = state->regs[R00];
 119
 120         v4l2_dbg(1, debug, sd, "changed input or channel\n");
 121         upd64031a_write(sd, R00, reg | 0x10);
 122         upd64031a_write(sd, R00, reg & ~0x10);
 123         return 0;
 124 }
 125
 126 /* ------------------------------------------------------------------------ */
 127
 128 static int upd64031a_s_routing(struct v4l2_subdev *sd,
 129                                u32 input, u32 output, u32 config)
 130 {
 131         struct upd64031a_state *state = to_state(sd);
 132         u8 r00, r05, r08;
 133
 134         state->gr_mode = (input & 3) << 6;
 135         state->direct_3dycs_connect = (input & 0xc) << 4;
 136         state->ext_comp_sync =
 137                 (input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
 138         state->ext_vert_sync =
 139                 (input & UPD64031A_VERTICAL_EXTERNAL) << 2;
 140         r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
 141         r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
 142                 state->ext_comp_sync | state->ext_vert_sync;
 143         r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
 144                 state->direct_3dycs_connect;
 145         upd64031a_write(sd, R00, r00);
 146         upd64031a_write(sd, R05, r05);
 147         upd64031a_write(sd, R08, r08);
 148         return upd64031a_s_frequency(sd, NULL);
 149 }
 150
 151 static int upd64031a_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 152 {
 153         struct i2c_client *client = v4l2_get_subdevdata(sd);
 154
 155         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64031A, 0);
 156 }
 157
 158 static int upd64031a_log_status(struct v4l2_subdev *sd)
 159 {
 160         v4l2_info(sd, "Status: SA00=0x%02x SA01=0x%02x\n",
 161                         upd64031a_read(sd, 0), upd64031a_read(sd, 1));
 162         return 0;
 163 }
 164
 165 #ifdef CONFIG_VIDEO_ADV_DEBUG
 166 static int upd64031a_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
 167 {
 168         struct i2c_client *client = v4l2_get_subdevdata(sd);
 169
 170         if (!v4l2_chip_match_i2c_client(client, &reg->match))
 171                 return -EINVAL;
 172         if (!capable(CAP_SYS_ADMIN))
 173                 return -EPERM;
 174         reg->val = upd64031a_read(sd, reg->reg & 0xff);
 175         reg->size = 1;
 176         return 0;
 177 }
 178
 179 static int upd64031a_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
 180 {
 181         struct i2c_client *client = v4l2_get_subdevdata(sd);
 182
 183         if (!v4l2_chip_match_i2c_client(client, &reg->match))
 184                 return -EINVAL;
 185         if (!capable(CAP_SYS_ADMIN))
 186                 return -EPERM;
 187         upd64031a_write(sd, reg->reg & 0xff, reg->val & 0xff);
 188         return 0;
 189 }
 190 #endif
 191
 192 /* ----------------------------------------------------------------------- */
 193
 194 static const struct v4l2_subdev_core_ops upd64031a_core_ops = {
 195         .log_status = upd64031a_log_status,
 196         .g_chip_ident = upd64031a_g_chip_ident,
 197 #ifdef CONFIG_VIDEO_ADV_DEBUG
 198         .g_register = upd64031a_g_register,
 199         .s_register = upd64031a_s_register,
 200 #endif
 201 };
 202
 203 static const struct v4l2_subdev_tuner_ops upd64031a_tuner_ops = {
 204         .s_frequency = upd64031a_s_frequency,
 205 };
 206
 207 static const struct v4l2_subdev_video_ops upd64031a_video_ops = {
 208         .s_routing = upd64031a_s_routing,
 209 };
 210
 211 static const struct v4l2_subdev_ops upd64031a_ops = {
 212         .core = &upd64031a_core_ops,
 213         .tuner = &upd64031a_tuner_ops,
 214         .video = &upd64031a_video_ops,
 215 };
 216
 217 /* ------------------------------------------------------------------------ */
 218
 219 /* i2c implementation */
 220
 221 static int upd64031a_probe(struct i2c_client *client,
 222                            const struct i2c_device_id *id)
 223 {
 224         struct upd64031a_state *state;
 225         struct v4l2_subdev *sd;
 226         int i;
 227
 228         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 229                 return -EIO;
 230
 231         v4l_info(client, "chip found @ 0x%x (%s)\n",
 232                         client->addr << 1, client->adapter->name);
 233
 234         state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
 235         if (state == NULL)
 236                 return -ENOMEM;
 237         sd = &state->sd;
 238         v4l2_i2c_subdev_init(sd, client, &upd64031a_ops);
 239         memcpy(state->regs, upd64031a_init, sizeof(state->regs));
 240         state->gr_mode = UPD64031A_GR_ON << 6;
 241         state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
 242         state->ext_comp_sync = state->ext_vert_sync = 0;
 243         for (i = 0; i < TOT_REGS; i++)
 244                 upd64031a_write(sd, i, state->regs[i]);
 245         return 0;
 246 }
 247
 248 static int upd64031a_remove(struct i2c_client *client)
 249 {
 250         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 251
 252         v4l2_device_unregister_subdev(sd);
 253         kfree(to_state(sd));
 254         return 0;
 255 }
 256
 257 /* ----------------------------------------------------------------------- */
 258
 259 static const struct i2c_device_id upd64031a_id[] = {
 260         { "upd64031a", 0 },
 261         { }
 262 };
 263 MODULE_DEVICE_TABLE(i2c, upd64031a_id);
 264
 265 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 266         .name = "upd64031a",
 267         .probe = upd64031a_probe,
 268         .remove = upd64031a_remove,
 269         .id_table = upd64031a_id,
 270 };