kernel/drivers/media/i2c/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/upd64031a.h>
  31
  32 /* --------------------- read registers functions define -------------------- */
  33
  34 /* bit masks */
  35 #define GR_MODE_MASK              0xc0
  36 #define DIRECT_3DYCS_CONNECT_MASK 0xc0
  37 #define SYNC_CIRCUIT_MASK         0xa0
  38
  39 /* -------------------------------------------------------------------------- */
  40
  41 MODULE_DESCRIPTION("uPD64031A driver");
  42 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
  43 MODULE_LICENSE("GPL");
  44
  45 static int debug;
  46 module_param(debug, int, 0644);
  47
  48 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  49
  50
  51 enum {
  52         R00 = 0, R01, R02, R03, R04,
  53         R05, R06, R07, R08, R09,
  54         R0A, R0B, R0C, R0D, R0E, R0F,
  55         /* unused registers
  56          R10, R11, R12, R13, R14,
  57          R15, R16, R17,
  58          */
  59         TOT_REGS
  60 };
  61
  62 struct upd64031a_state {
  63         struct v4l2_subdev sd;
  64         u8 regs[TOT_REGS];
  65         u8 gr_mode;
  66         u8 direct_3dycs_connect;
  67         u8 ext_comp_sync;
  68         u8 ext_vert_sync;
  69 };
  70
  71 static inline struct upd64031a_state *to_state(struct v4l2_subdev *sd)
  72 {
  73         return container_of(sd, struct upd64031a_state, sd);
  74 }
  75
  76 static u8 upd64031a_init[] = {
  77         0x00, 0xb8, 0x48, 0xd2, 0xe6,
  78         0x03, 0x10, 0x0b, 0xaf, 0x7f,
  79         0x00, 0x00, 0x1d, 0x5e, 0x00,
  80         0xd0
  81 };
  82
  83 /* ------------------------------------------------------------------------ */
  84
  85 static u8 upd64031a_read(struct v4l2_subdev *sd, u8 reg)
  86 {
  87         struct i2c_client *client = v4l2_get_subdevdata(sd);
  88         u8 buf[2];
  89
  90         if (reg >= sizeof(buf))
  91                 return 0xff;
  92         i2c_master_recv(client, buf, 2);
  93         return buf[reg];
  94 }
  95
  96 /* ------------------------------------------------------------------------ */
  97
  98 static void upd64031a_write(struct v4l2_subdev *sd, u8 reg, u8 val)
  99 {
 100         struct i2c_client *client = v4l2_get_subdevdata(sd);
 101         u8 buf[2];
 102
 103         buf[0] = reg;
 104         buf[1] = val;
 105         v4l2_dbg(1, debug, sd, "write reg: %02X val: %02X\n", reg, val);
 106         if (i2c_master_send(client, buf, 2) != 2)
 107                 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
 108 }
 109
 110 /* ------------------------------------------------------------------------ */
 111
 112 /* The input changed due to new input or channel changed */
 113 static int upd64031a_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq)
 114 {
 115         struct upd64031a_state *state = to_state(sd);
 116         u8 reg = state->regs[R00];
 117
 118         v4l2_dbg(1, debug, sd, "changed input or channel\n");
 119         upd64031a_write(sd, R00, reg | 0x10);
 120         upd64031a_write(sd, R00, reg & ~0x10);
 121         return 0;
 122 }
 123
 124 /* ------------------------------------------------------------------------ */
 125
 126 static int upd64031a_s_routing(struct v4l2_subdev *sd,
 127                                u32 input, u32 output, u32 config)
 128 {
 129         struct upd64031a_state *state = to_state(sd);
 130         u8 r00, r05, r08;
 131
 132         state->gr_mode = (input & 3) << 6;
 133         state->direct_3dycs_connect = (input & 0xc) << 4;
 134         state->ext_comp_sync =
 135                 (input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
 136         state->ext_vert_sync =
 137                 (input & UPD64031A_VERTICAL_EXTERNAL) << 2;
 138         r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
 139         r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
 140                 state->ext_comp_sync | state->ext_vert_sync;
 141         r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
 142                 state->direct_3dycs_connect;
 143         upd64031a_write(sd, R00, r00);
 144         upd64031a_write(sd, R05, r05);
 145         upd64031a_write(sd, R08, r08);
 146         return upd64031a_s_frequency(sd, NULL);
 147 }
 148
 149 static int upd64031a_log_status(struct v4l2_subdev *sd)
 150 {
 151         v4l2_info(sd, "Status: SA00=0x%02x SA01=0x%02x\n",
 152                         upd64031a_read(sd, 0), upd64031a_read(sd, 1));
 153         return 0;
 154 }
 155
 156 #ifdef CONFIG_VIDEO_ADV_DEBUG
 157 static int upd64031a_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
 158 {
 159         reg->val = upd64031a_read(sd, reg->reg & 0xff);
 160         reg->size = 1;
 161         return 0;
 162 }
 163
 164 static int upd64031a_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
 165 {
 166         upd64031a_write(sd, reg->reg & 0xff, reg->val & 0xff);
 167         return 0;
 168 }
 169 #endif
 170
 171 /* ----------------------------------------------------------------------- */
 172
 173 static const struct v4l2_subdev_core_ops upd64031a_core_ops = {
 174         .log_status = upd64031a_log_status,
 175 #ifdef CONFIG_VIDEO_ADV_DEBUG
 176         .g_register = upd64031a_g_register,
 177         .s_register = upd64031a_s_register,
 178 #endif
 179 };
 180
 181 static const struct v4l2_subdev_tuner_ops upd64031a_tuner_ops = {
 182         .s_frequency = upd64031a_s_frequency,
 183 };
 184
 185 static const struct v4l2_subdev_video_ops upd64031a_video_ops = {
 186         .s_routing = upd64031a_s_routing,
 187 };
 188
 189 static const struct v4l2_subdev_ops upd64031a_ops = {
 190         .core = &upd64031a_core_ops,
 191         .tuner = &upd64031a_tuner_ops,
 192         .video = &upd64031a_video_ops,
 193 };
 194
 195 /* ------------------------------------------------------------------------ */
 196
 197 /* i2c implementation */
 198
 199 static int upd64031a_probe(struct i2c_client *client,
 200                            const struct i2c_device_id *id)
 201 {
 202         struct upd64031a_state *state;
 203         struct v4l2_subdev *sd;
 204         int i;
 205
 206         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 207                 return -EIO;
 208
 209         v4l_info(client, "chip found @ 0x%x (%s)\n",
 210                         client->addr << 1, client->adapter->name);
 211
 212         state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
 213         if (state == NULL)
 214                 return -ENOMEM;
 215         sd = &state->sd;
 216         v4l2_i2c_subdev_init(sd, client, &upd64031a_ops);
 217         memcpy(state->regs, upd64031a_init, sizeof(state->regs));
 218         state->gr_mode = UPD64031A_GR_ON << 6;
 219         state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
 220         state->ext_comp_sync = state->ext_vert_sync = 0;
 221         for (i = 0; i < TOT_REGS; i++)
 222                 upd64031a_write(sd, i, state->regs[i]);
 223         return 0;
 224 }
 225
 226 static int upd64031a_remove(struct i2c_client *client)
 227 {
 228         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 229
 230         v4l2_device_unregister_subdev(sd);
 231         return 0;
 232 }
 233
 234 /* ----------------------------------------------------------------------- */
 235
 236 static const struct i2c_device_id upd64031a_id[] = {
 237         { "upd64031a", 0 },
 238         { }
 239 };
 240 MODULE_DEVICE_TABLE(i2c, upd64031a_id);
 241
 242 static struct i2c_driver upd64031a_driver = {
 243         .driver = {
 244                 .owner  = THIS_MODULE,
 245                 .name   = "upd64031a",
 246         },
 247         .probe          = upd64031a_probe,
 248         .remove         = upd64031a_remove,
 249         .id_table       = upd64031a_id,
 250 };
 251
 252 module_i2c_driver(upd64031a_driver);