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 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 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/upd64083.h> 32 33 MODULE_DESCRIPTION("uPD64083 driver"); 34 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil"); 35 MODULE_LICENSE("GPL"); 36 37 static bool debug; 38 module_param(debug, bool, 0644); 39 40 MODULE_PARM_DESC(debug, "Debug level (0-1)"); 41 42 43 enum { 44 R00 = 0, R01, R02, R03, R04, 45 R05, R06, R07, R08, R09, 46 R0A, R0B, R0C, R0D, R0E, R0F, 47 R10, R11, R12, R13, R14, 48 R15, R16, 49 TOT_REGS 50 }; 51 52 struct upd64083_state { 53 struct v4l2_subdev sd; 54 u8 mode; 55 u8 ext_y_adc; 56 u8 regs[TOT_REGS]; 57 }; 58 59 static inline struct upd64083_state *to_state(struct v4l2_subdev *sd) 60 { 61 return container_of(sd, struct upd64083_state, sd); 62 } 63 64 /* Initial values when used in combination with the 65 NEC upd64031a ghost reduction chip. */ 66 static u8 upd64083_init[] = { 67 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */ 68 0x36, 0xdd, 0x05, 0x56, 0x48, 69 0x00, 0x3a, 0xa0, 0x05, 0x08, 70 0x44, 0x60, 0x08, 0x52, 0xf8, 71 0x53, 0x60, 0x10 72 }; 73 74 /* ------------------------------------------------------------------------ */ 75 76 static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val) 77 { 78 struct i2c_client *client = v4l2_get_subdevdata(sd); 79 u8 buf[2]; 80 81 buf[0] = reg; 82 buf[1] = val; 83 v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val); 84 if (i2c_master_send(client, buf, 2) != 2) 85 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val); 86 } 87 88 /* ------------------------------------------------------------------------ */ 89 90 #ifdef CONFIG_VIDEO_ADV_DEBUG 91 static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg) 92 { 93 struct i2c_client *client = v4l2_get_subdevdata(sd); 94 u8 buf[7]; 95 96 if (reg >= sizeof(buf)) 97 return 0xff; 98 i2c_master_recv(client, buf, sizeof(buf)); 99 return buf[reg]; 100 } 101 #endif 102 103 /* ------------------------------------------------------------------------ */ 104 105 static int upd64083_s_routing(struct v4l2_subdev *sd, 106 u32 input, u32 output, u32 config) 107 { 108 struct upd64083_state *state = to_state(sd); 109 u8 r00, r02; 110 111 if (input > 7 || (input & 6) == 6) 112 return -EINVAL; 113 state->mode = (input & 3) << 6; 114 state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3; 115 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode; 116 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc; 117 upd64083_write(sd, R00, r00); 118 upd64083_write(sd, R02, r02); 119 return 0; 120 } 121 122 #ifdef CONFIG_VIDEO_ADV_DEBUG 123 static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) 124 { 125 struct i2c_client *client = v4l2_get_subdevdata(sd); 126 127 if (!v4l2_chip_match_i2c_client(client, ®->match)) 128 return -EINVAL; 129 if (!capable(CAP_SYS_ADMIN)) 130 return -EPERM; 131 reg->val = upd64083_read(sd, reg->reg & 0xff); 132 reg->size = 1; 133 return 0; 134 } 135 136 static int upd64083_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) 137 { 138 struct i2c_client *client = v4l2_get_subdevdata(sd); 139 140 if (!v4l2_chip_match_i2c_client(client, ®->match)) 141 return -EINVAL; 142 if (!capable(CAP_SYS_ADMIN)) 143 return -EPERM; 144 upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff); 145 return 0; 146 } 147 #endif 148 149 static int upd64083_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) 150 { 151 struct i2c_client *client = v4l2_get_subdevdata(sd); 152 153 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64083, 0); 154 } 155 156 static int upd64083_log_status(struct v4l2_subdev *sd) 157 { 158 struct i2c_client *client = v4l2_get_subdevdata(sd); 159 u8 buf[7]; 160 161 i2c_master_recv(client, buf, 7); 162 v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x " 163 "SA04=%02x SA05=%02x SA06=%02x\n", 164 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); 165 return 0; 166 } 167 168 /* ----------------------------------------------------------------------- */ 169 170 static const struct v4l2_subdev_core_ops upd64083_core_ops = { 171 .log_status = upd64083_log_status, 172 .g_chip_ident = upd64083_g_chip_ident, 173 #ifdef CONFIG_VIDEO_ADV_DEBUG 174 .g_register = upd64083_g_register, 175 .s_register = upd64083_s_register, 176 #endif 177 }; 178 179 static const struct v4l2_subdev_video_ops upd64083_video_ops = { 180 .s_routing = upd64083_s_routing, 181 }; 182 183 static const struct v4l2_subdev_ops upd64083_ops = { 184 .core = &upd64083_core_ops, 185 .video = &upd64083_video_ops, 186 }; 187 188 /* ------------------------------------------------------------------------ */ 189 190 /* i2c implementation */ 191 192 static int upd64083_probe(struct i2c_client *client, 193 const struct i2c_device_id *id) 194 { 195 struct upd64083_state *state; 196 struct v4l2_subdev *sd; 197 int i; 198 199 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 200 return -EIO; 201 202 v4l_info(client, "chip found @ 0x%x (%s)\n", 203 client->addr << 1, client->adapter->name); 204 205 state = kzalloc(sizeof(struct upd64083_state), GFP_KERNEL); 206 if (state == NULL) 207 return -ENOMEM; 208 sd = &state->sd; 209 v4l2_i2c_subdev_init(sd, client, &upd64083_ops); 210 /* Initially assume that a ghost reduction chip is present */ 211 state->mode = 0; /* YCS mode */ 212 state->ext_y_adc = (1 << 5); 213 memcpy(state->regs, upd64083_init, TOT_REGS); 214 for (i = 0; i < TOT_REGS; i++) 215 upd64083_write(sd, i, state->regs[i]); 216 return 0; 217 } 218 219 static int upd64083_remove(struct i2c_client *client) 220 { 221 struct v4l2_subdev *sd = i2c_get_clientdata(client); 222 223 v4l2_device_unregister_subdev(sd); 224 kfree(to_state(sd)); 225 return 0; 226 } 227 228 /* ----------------------------------------------------------------------- */ 229 230 static const struct i2c_device_id upd64083_id[] = { 231 { "upd64083", 0 }, 232 { } 233 }; 234 MODULE_DEVICE_TABLE(i2c, upd64083_id); 235 236 static struct i2c_driver upd64083_driver = { 237 .driver = { 238 .owner = THIS_MODULE, 239 .name = "upd64083", 240 }, 241 .probe = upd64083_probe, 242 .remove = upd64083_remove, 243 .id_table = upd64083_id, 244 }; 245 246 module_i2c_driver(upd64083_driver); 247