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/upd64083.h> 31 32 MODULE_DESCRIPTION("uPD64083 driver"); 33 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil"); 34 MODULE_LICENSE("GPL"); 35 36 static bool debug; 37 module_param(debug, bool, 0644); 38 39 MODULE_PARM_DESC(debug, "Debug level (0-1)"); 40 41 42 enum { 43 R00 = 0, R01, R02, R03, R04, 44 R05, R06, R07, R08, R09, 45 R0A, R0B, R0C, R0D, R0E, R0F, 46 R10, R11, R12, R13, R14, 47 R15, R16, 48 TOT_REGS 49 }; 50 51 struct upd64083_state { 52 struct v4l2_subdev sd; 53 u8 mode; 54 u8 ext_y_adc; 55 u8 regs[TOT_REGS]; 56 }; 57 58 static inline struct upd64083_state *to_state(struct v4l2_subdev *sd) 59 { 60 return container_of(sd, struct upd64083_state, sd); 61 } 62 63 /* Initial values when used in combination with the 64 NEC upd64031a ghost reduction chip. */ 65 static u8 upd64083_init[] = { 66 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */ 67 0x36, 0xdd, 0x05, 0x56, 0x48, 68 0x00, 0x3a, 0xa0, 0x05, 0x08, 69 0x44, 0x60, 0x08, 0x52, 0xf8, 70 0x53, 0x60, 0x10 71 }; 72 73 /* ------------------------------------------------------------------------ */ 74 75 static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val) 76 { 77 struct i2c_client *client = v4l2_get_subdevdata(sd); 78 u8 buf[2]; 79 80 buf[0] = reg; 81 buf[1] = val; 82 v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val); 83 if (i2c_master_send(client, buf, 2) != 2) 84 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val); 85 } 86 87 /* ------------------------------------------------------------------------ */ 88 89 #ifdef CONFIG_VIDEO_ADV_DEBUG 90 static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg) 91 { 92 struct i2c_client *client = v4l2_get_subdevdata(sd); 93 u8 buf[7]; 94 95 if (reg >= sizeof(buf)) 96 return 0xff; 97 i2c_master_recv(client, buf, sizeof(buf)); 98 return buf[reg]; 99 } 100 #endif 101 102 /* ------------------------------------------------------------------------ */ 103 104 static int upd64083_s_routing(struct v4l2_subdev *sd, 105 u32 input, u32 output, u32 config) 106 { 107 struct upd64083_state *state = to_state(sd); 108 u8 r00, r02; 109 110 if (input > 7 || (input & 6) == 6) 111 return -EINVAL; 112 state->mode = (input & 3) << 6; 113 state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3; 114 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode; 115 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc; 116 upd64083_write(sd, R00, r00); 117 upd64083_write(sd, R02, r02); 118 return 0; 119 } 120 121 #ifdef CONFIG_VIDEO_ADV_DEBUG 122 static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) 123 { 124 reg->val = upd64083_read(sd, reg->reg & 0xff); 125 reg->size = 1; 126 return 0; 127 } 128 129 static int upd64083_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) 130 { 131 upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff); 132 return 0; 133 } 134 #endif 135 136 static int upd64083_log_status(struct v4l2_subdev *sd) 137 { 138 struct i2c_client *client = v4l2_get_subdevdata(sd); 139 u8 buf[7]; 140 141 i2c_master_recv(client, buf, 7); 142 v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x " 143 "SA04=%02x SA05=%02x SA06=%02x\n", 144 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); 145 return 0; 146 } 147 148 /* ----------------------------------------------------------------------- */ 149 150 static const struct v4l2_subdev_core_ops upd64083_core_ops = { 151 .log_status = upd64083_log_status, 152 #ifdef CONFIG_VIDEO_ADV_DEBUG 153 .g_register = upd64083_g_register, 154 .s_register = upd64083_s_register, 155 #endif 156 }; 157 158 static const struct v4l2_subdev_video_ops upd64083_video_ops = { 159 .s_routing = upd64083_s_routing, 160 }; 161 162 static const struct v4l2_subdev_ops upd64083_ops = { 163 .core = &upd64083_core_ops, 164 .video = &upd64083_video_ops, 165 }; 166 167 /* ------------------------------------------------------------------------ */ 168 169 /* i2c implementation */ 170 171 static int upd64083_probe(struct i2c_client *client, 172 const struct i2c_device_id *id) 173 { 174 struct upd64083_state *state; 175 struct v4l2_subdev *sd; 176 int i; 177 178 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 179 return -EIO; 180 181 v4l_info(client, "chip found @ 0x%x (%s)\n", 182 client->addr << 1, client->adapter->name); 183 184 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); 185 if (state == NULL) 186 return -ENOMEM; 187 sd = &state->sd; 188 v4l2_i2c_subdev_init(sd, client, &upd64083_ops); 189 /* Initially assume that a ghost reduction chip is present */ 190 state->mode = 0; /* YCS mode */ 191 state->ext_y_adc = (1 << 5); 192 memcpy(state->regs, upd64083_init, TOT_REGS); 193 for (i = 0; i < TOT_REGS; i++) 194 upd64083_write(sd, i, state->regs[i]); 195 return 0; 196 } 197 198 static int upd64083_remove(struct i2c_client *client) 199 { 200 struct v4l2_subdev *sd = i2c_get_clientdata(client); 201 202 v4l2_device_unregister_subdev(sd); 203 return 0; 204 } 205 206 /* ----------------------------------------------------------------------- */ 207 208 static const struct i2c_device_id upd64083_id[] = { 209 { "upd64083", 0 }, 210 { } 211 }; 212 MODULE_DEVICE_TABLE(i2c, upd64083_id); 213 214 static struct i2c_driver upd64083_driver = { 215 .driver = { 216 .owner = THIS_MODULE, 217 .name = "upd64083", 218 }, 219 .probe = upd64083_probe, 220 .remove = upd64083_remove, 221 .id_table = upd64083_id, 222 }; 223 224 module_i2c_driver(upd64083_driver); 225