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/i2c/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 .name = "upd64031a", 245 }, 246 .probe = upd64031a_probe, 247 .remove = upd64031a_remove, 248 .id_table = upd64031a_id, 249 }; 250 251 module_i2c_driver(upd64031a_driver); 252