1 /* 2 * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver 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 9 * modify it under the terms of the GNU General Public License 10 * as published by the Free Software Foundation; either version 2 11 * of the License, or (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 19 #include <linux/module.h> 20 #include <linux/kernel.h> 21 #include <linux/i2c.h> 22 #include <linux/videodev2.h> 23 #include <linux/slab.h> 24 #include <media/v4l2-device.h> 25 #include <media/i2c/upd64083.h> 26 27 MODULE_DESCRIPTION("uPD64083 driver"); 28 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil"); 29 MODULE_LICENSE("GPL"); 30 31 static bool debug; 32 module_param(debug, bool, 0644); 33 34 MODULE_PARM_DESC(debug, "Debug level (0-1)"); 35 36 37 enum { 38 R00 = 0, R01, R02, R03, R04, 39 R05, R06, R07, R08, R09, 40 R0A, R0B, R0C, R0D, R0E, R0F, 41 R10, R11, R12, R13, R14, 42 R15, R16, 43 TOT_REGS 44 }; 45 46 struct upd64083_state { 47 struct v4l2_subdev sd; 48 u8 mode; 49 u8 ext_y_adc; 50 u8 regs[TOT_REGS]; 51 }; 52 53 static inline struct upd64083_state *to_state(struct v4l2_subdev *sd) 54 { 55 return container_of(sd, struct upd64083_state, sd); 56 } 57 58 /* Initial values when used in combination with the 59 NEC upd64031a ghost reduction chip. */ 60 static u8 upd64083_init[] = { 61 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */ 62 0x36, 0xdd, 0x05, 0x56, 0x48, 63 0x00, 0x3a, 0xa0, 0x05, 0x08, 64 0x44, 0x60, 0x08, 0x52, 0xf8, 65 0x53, 0x60, 0x10 66 }; 67 68 /* ------------------------------------------------------------------------ */ 69 70 static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val) 71 { 72 struct i2c_client *client = v4l2_get_subdevdata(sd); 73 u8 buf[2]; 74 75 buf[0] = reg; 76 buf[1] = val; 77 v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val); 78 if (i2c_master_send(client, buf, 2) != 2) 79 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val); 80 } 81 82 /* ------------------------------------------------------------------------ */ 83 84 #ifdef CONFIG_VIDEO_ADV_DEBUG 85 static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg) 86 { 87 struct i2c_client *client = v4l2_get_subdevdata(sd); 88 u8 buf[7]; 89 90 if (reg >= sizeof(buf)) 91 return 0xff; 92 i2c_master_recv(client, buf, sizeof(buf)); 93 return buf[reg]; 94 } 95 #endif 96 97 /* ------------------------------------------------------------------------ */ 98 99 static int upd64083_s_routing(struct v4l2_subdev *sd, 100 u32 input, u32 output, u32 config) 101 { 102 struct upd64083_state *state = to_state(sd); 103 u8 r00, r02; 104 105 if (input > 7 || (input & 6) == 6) 106 return -EINVAL; 107 state->mode = (input & 3) << 6; 108 state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3; 109 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode; 110 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc; 111 upd64083_write(sd, R00, r00); 112 upd64083_write(sd, R02, r02); 113 return 0; 114 } 115 116 #ifdef CONFIG_VIDEO_ADV_DEBUG 117 static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) 118 { 119 reg->val = upd64083_read(sd, reg->reg & 0xff); 120 reg->size = 1; 121 return 0; 122 } 123 124 static int upd64083_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) 125 { 126 upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff); 127 return 0; 128 } 129 #endif 130 131 static int upd64083_log_status(struct v4l2_subdev *sd) 132 { 133 struct i2c_client *client = v4l2_get_subdevdata(sd); 134 u8 buf[7]; 135 136 i2c_master_recv(client, buf, 7); 137 v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x " 138 "SA04=%02x SA05=%02x SA06=%02x\n", 139 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); 140 return 0; 141 } 142 143 /* ----------------------------------------------------------------------- */ 144 145 static const struct v4l2_subdev_core_ops upd64083_core_ops = { 146 .log_status = upd64083_log_status, 147 #ifdef CONFIG_VIDEO_ADV_DEBUG 148 .g_register = upd64083_g_register, 149 .s_register = upd64083_s_register, 150 #endif 151 }; 152 153 static const struct v4l2_subdev_video_ops upd64083_video_ops = { 154 .s_routing = upd64083_s_routing, 155 }; 156 157 static const struct v4l2_subdev_ops upd64083_ops = { 158 .core = &upd64083_core_ops, 159 .video = &upd64083_video_ops, 160 }; 161 162 /* ------------------------------------------------------------------------ */ 163 164 /* i2c implementation */ 165 166 static int upd64083_probe(struct i2c_client *client, 167 const struct i2c_device_id *id) 168 { 169 struct upd64083_state *state; 170 struct v4l2_subdev *sd; 171 int i; 172 173 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 174 return -EIO; 175 176 v4l_info(client, "chip found @ 0x%x (%s)\n", 177 client->addr << 1, client->adapter->name); 178 179 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); 180 if (state == NULL) 181 return -ENOMEM; 182 sd = &state->sd; 183 v4l2_i2c_subdev_init(sd, client, &upd64083_ops); 184 /* Initially assume that a ghost reduction chip is present */ 185 state->mode = 0; /* YCS mode */ 186 state->ext_y_adc = (1 << 5); 187 memcpy(state->regs, upd64083_init, TOT_REGS); 188 for (i = 0; i < TOT_REGS; i++) 189 upd64083_write(sd, i, state->regs[i]); 190 return 0; 191 } 192 193 static int upd64083_remove(struct i2c_client *client) 194 { 195 struct v4l2_subdev *sd = i2c_get_clientdata(client); 196 197 v4l2_device_unregister_subdev(sd); 198 return 0; 199 } 200 201 /* ----------------------------------------------------------------------- */ 202 203 static const struct i2c_device_id upd64083_id[] = { 204 { "upd64083", 0 }, 205 { } 206 }; 207 MODULE_DEVICE_TABLE(i2c, upd64083_id); 208 209 static struct i2c_driver upd64083_driver = { 210 .driver = { 211 .name = "upd64083", 212 }, 213 .probe = upd64083_probe, 214 .remove = upd64083_remove, 215 .id_table = upd64083_id, 216 }; 217 218 module_i2c_driver(upd64083_driver); 219