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, const 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, ®->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, ®->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 module_i2c_driver(upd64031a_driver); 275