drivers/media/video/ov9740.c

   1 /*
   2  * OmniVision OV9740 Camera Driver
   3  *
   4  * Copyright (C) 2011 NVIDIA Corporation
   5  *
   6  * Based on ov9640 camera driver.
   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 version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/init.h>
  14 #include <linux/module.h>
  15 #include <linux/i2c.h>
  16 #include <linux/slab.h>
  17 #include <linux/v4l2-mediabus.h>
  18
  19 #include <media/soc_camera.h>
  20 #include <media/v4l2-chip-ident.h>
  21 #include <media/v4l2-ctrls.h>
  22
  23 #define to_ov9740(sd)           container_of(sd, struct ov9740_priv, subdev)
  24
  25 /* General Status Registers */
  26 #define OV9740_MODEL_ID_HI              0x0000
  27 #define OV9740_MODEL_ID_LO              0x0001
  28 #define OV9740_REVISION_NUMBER          0x0002
  29 #define OV9740_MANUFACTURER_ID          0x0003
  30 #define OV9740_SMIA_VERSION             0x0004
  31
  32 /* General Setup Registers */
  33 #define OV9740_MODE_SELECT              0x0100
  34 #define OV9740_IMAGE_ORT                0x0101
  35 #define OV9740_SOFTWARE_RESET           0x0103
  36 #define OV9740_GRP_PARAM_HOLD           0x0104
  37 #define OV9740_MSK_CORRUP_FM            0x0105
  38
  39 /* Timing Setting */
  40 #define OV9740_FRM_LENGTH_LN_HI         0x0340 /* VTS */
  41 #define OV9740_FRM_LENGTH_LN_LO         0x0341 /* VTS */
  42 #define OV9740_LN_LENGTH_PCK_HI         0x0342 /* HTS */
  43 #define OV9740_LN_LENGTH_PCK_LO         0x0343 /* HTS */
  44 #define OV9740_X_ADDR_START_HI          0x0344
  45 #define OV9740_X_ADDR_START_LO          0x0345
  46 #define OV9740_Y_ADDR_START_HI          0x0346
  47 #define OV9740_Y_ADDR_START_LO          0x0347
  48 #define OV9740_X_ADDR_END_HI            0x0348
  49 #define OV9740_X_ADDR_END_LO            0x0349
  50 #define OV9740_Y_ADDR_END_HI            0x034a
  51 #define OV9740_Y_ADDR_END_LO            0x034b
  52 #define OV9740_X_OUTPUT_SIZE_HI         0x034c
  53 #define OV9740_X_OUTPUT_SIZE_LO         0x034d
  54 #define OV9740_Y_OUTPUT_SIZE_HI         0x034e
  55 #define OV9740_Y_OUTPUT_SIZE_LO         0x034f
  56
  57 /* IO Control Registers */
  58 #define OV9740_IO_CREL00                0x3002
  59 #define OV9740_IO_CREL01                0x3004
  60 #define OV9740_IO_CREL02                0x3005
  61 #define OV9740_IO_OUTPUT_SEL01          0x3026
  62 #define OV9740_IO_OUTPUT_SEL02          0x3027
  63
  64 /* AWB Registers */
  65 #define OV9740_AWB_MANUAL_CTRL          0x3406
  66
  67 /* Analog Control Registers */
  68 #define OV9740_ANALOG_CTRL01            0x3601
  69 #define OV9740_ANALOG_CTRL02            0x3602
  70 #define OV9740_ANALOG_CTRL03            0x3603
  71 #define OV9740_ANALOG_CTRL04            0x3604
  72 #define OV9740_ANALOG_CTRL10            0x3610
  73 #define OV9740_ANALOG_CTRL12            0x3612
  74 #define OV9740_ANALOG_CTRL15            0x3615
  75 #define OV9740_ANALOG_CTRL20            0x3620
  76 #define OV9740_ANALOG_CTRL21            0x3621
  77 #define OV9740_ANALOG_CTRL22            0x3622
  78 #define OV9740_ANALOG_CTRL30            0x3630
  79 #define OV9740_ANALOG_CTRL31            0x3631
  80 #define OV9740_ANALOG_CTRL32            0x3632
  81 #define OV9740_ANALOG_CTRL33            0x3633
  82
  83 /* Sensor Control */
  84 #define OV9740_SENSOR_CTRL03            0x3703
  85 #define OV9740_SENSOR_CTRL04            0x3704
  86 #define OV9740_SENSOR_CTRL05            0x3705
  87 #define OV9740_SENSOR_CTRL07            0x3707
  88
  89 /* Timing Control */
  90 #define OV9740_TIMING_CTRL17            0x3817
  91 #define OV9740_TIMING_CTRL19            0x3819
  92 #define OV9740_TIMING_CTRL33            0x3833
  93 #define OV9740_TIMING_CTRL35            0x3835
  94
  95 /* Banding Filter */
  96 #define OV9740_AEC_MAXEXPO_60_H         0x3a02
  97 #define OV9740_AEC_MAXEXPO_60_L         0x3a03
  98 #define OV9740_AEC_B50_STEP_HI          0x3a08
  99 #define OV9740_AEC_B50_STEP_LO          0x3a09
 100 #define OV9740_AEC_B60_STEP_HI          0x3a0a
 101 #define OV9740_AEC_B60_STEP_LO          0x3a0b
 102 #define OV9740_AEC_CTRL0D               0x3a0d
 103 #define OV9740_AEC_CTRL0E               0x3a0e
 104 #define OV9740_AEC_MAXEXPO_50_H         0x3a14
 105 #define OV9740_AEC_MAXEXPO_50_L         0x3a15
 106
 107 /* AEC/AGC Control */
 108 #define OV9740_AEC_ENABLE               0x3503
 109 #define OV9740_GAIN_CEILING_01          0x3a18
 110 #define OV9740_GAIN_CEILING_02          0x3a19
 111 #define OV9740_AEC_HI_THRESHOLD         0x3a11
 112 #define OV9740_AEC_3A1A                 0x3a1a
 113 #define OV9740_AEC_CTRL1B_WPT2          0x3a1b
 114 #define OV9740_AEC_CTRL0F_WPT           0x3a0f
 115 #define OV9740_AEC_CTRL10_BPT           0x3a10
 116 #define OV9740_AEC_CTRL1E_BPT2          0x3a1e
 117 #define OV9740_AEC_LO_THRESHOLD         0x3a1f
 118
 119 /* BLC Control */
 120 #define OV9740_BLC_AUTO_ENABLE          0x4002
 121 #define OV9740_BLC_MODE                 0x4005
 122
 123 /* VFIFO */
 124 #define OV9740_VFIFO_READ_START_HI      0x4608
 125 #define OV9740_VFIFO_READ_START_LO      0x4609
 126
 127 /* DVP Control */
 128 #define OV9740_DVP_VSYNC_CTRL02         0x4702
 129 #define OV9740_DVP_VSYNC_MODE           0x4704
 130 #define OV9740_DVP_VSYNC_CTRL06         0x4706
 131
 132 /* PLL Setting */
 133 #define OV9740_PLL_MODE_CTRL01          0x3104
 134 #define OV9740_PRE_PLL_CLK_DIV          0x0305
 135 #define OV9740_PLL_MULTIPLIER           0x0307
 136 #define OV9740_VT_SYS_CLK_DIV           0x0303
 137 #define OV9740_VT_PIX_CLK_DIV           0x0301
 138 #define OV9740_PLL_CTRL3010             0x3010
 139 #define OV9740_VFIFO_CTRL00             0x460e
 140
 141 /* ISP Control */
 142 #define OV9740_ISP_CTRL00               0x5000
 143 #define OV9740_ISP_CTRL01               0x5001
 144 #define OV9740_ISP_CTRL03               0x5003
 145 #define OV9740_ISP_CTRL05               0x5005
 146 #define OV9740_ISP_CTRL12               0x5012
 147 #define OV9740_ISP_CTRL19               0x5019
 148 #define OV9740_ISP_CTRL1A               0x501a
 149 #define OV9740_ISP_CTRL1E               0x501e
 150 #define OV9740_ISP_CTRL1F               0x501f
 151 #define OV9740_ISP_CTRL20               0x5020
 152 #define OV9740_ISP_CTRL21               0x5021
 153
 154 /* AWB */
 155 #define OV9740_AWB_CTRL00               0x5180
 156 #define OV9740_AWB_CTRL01               0x5181
 157 #define OV9740_AWB_CTRL02               0x5182
 158 #define OV9740_AWB_CTRL03               0x5183
 159 #define OV9740_AWB_ADV_CTRL01           0x5184
 160 #define OV9740_AWB_ADV_CTRL02           0x5185
 161 #define OV9740_AWB_ADV_CTRL03           0x5186
 162 #define OV9740_AWB_ADV_CTRL04           0x5187
 163 #define OV9740_AWB_ADV_CTRL05           0x5188
 164 #define OV9740_AWB_ADV_CTRL06           0x5189
 165 #define OV9740_AWB_ADV_CTRL07           0x518a
 166 #define OV9740_AWB_ADV_CTRL08           0x518b
 167 #define OV9740_AWB_ADV_CTRL09           0x518c
 168 #define OV9740_AWB_ADV_CTRL10           0x518d
 169 #define OV9740_AWB_ADV_CTRL11           0x518e
 170 #define OV9740_AWB_CTRL0F               0x518f
 171 #define OV9740_AWB_CTRL10               0x5190
 172 #define OV9740_AWB_CTRL11               0x5191
 173 #define OV9740_AWB_CTRL12               0x5192
 174 #define OV9740_AWB_CTRL13               0x5193
 175 #define OV9740_AWB_CTRL14               0x5194
 176
 177 /* MIPI Control */
 178 #define OV9740_MIPI_CTRL00              0x4800
 179 #define OV9740_MIPI_3837                0x3837
 180 #define OV9740_MIPI_CTRL01              0x4801
 181 #define OV9740_MIPI_CTRL03              0x4803
 182 #define OV9740_MIPI_CTRL05              0x4805
 183 #define OV9740_VFIFO_RD_CTRL            0x4601
 184 #define OV9740_MIPI_CTRL_3012           0x3012
 185 #define OV9740_SC_CMMM_MIPI_CTR         0x3014
 186
 187 #define OV9740_MAX_WIDTH                1280
 188 #define OV9740_MAX_HEIGHT               720
 189
 190 /* Misc. structures */
 191 struct ov9740_reg {
 192         u16                             reg;
 193         u8                              val;
 194 };
 195
 196 struct ov9740_priv {
 197         struct v4l2_subdev              subdev;
 198         struct v4l2_ctrl_handler        hdl;
 199
 200         int                             ident;
 201         u16                             model;
 202         u8                              revision;
 203         u8                              manid;
 204         u8                              smiaver;
 205
 206         bool                            flag_vflip;
 207         bool                            flag_hflip;
 208
 209         /* For suspend/resume. */
 210         struct v4l2_mbus_framefmt       current_mf;
 211         bool                            current_enable;
 212 };
 213
 214 static const struct ov9740_reg ov9740_defaults[] = {
 215         /* Software Reset */
 216         { OV9740_SOFTWARE_RESET,        0x01 },
 217
 218         /* Banding Filter */
 219         { OV9740_AEC_B50_STEP_HI,       0x00 },
 220         { OV9740_AEC_B50_STEP_LO,       0xe8 },
 221         { OV9740_AEC_CTRL0E,            0x03 },
 222         { OV9740_AEC_MAXEXPO_50_H,      0x15 },
 223         { OV9740_AEC_MAXEXPO_50_L,      0xc6 },
 224         { OV9740_AEC_B60_STEP_HI,       0x00 },
 225         { OV9740_AEC_B60_STEP_LO,       0xc0 },
 226         { OV9740_AEC_CTRL0D,            0x04 },
 227         { OV9740_AEC_MAXEXPO_60_H,      0x18 },
 228         { OV9740_AEC_MAXEXPO_60_L,      0x20 },
 229
 230         /* LC */
 231         { 0x5842, 0x02 }, { 0x5843, 0x5e }, { 0x5844, 0x04 }, { 0x5845, 0x32 },
 232         { 0x5846, 0x03 }, { 0x5847, 0x29 }, { 0x5848, 0x02 }, { 0x5849, 0xcc },
 233
 234         /* Un-documented OV9740 registers */
 235         { 0x5800, 0x29 }, { 0x5801, 0x25 }, { 0x5802, 0x20 }, { 0x5803, 0x21 },
 236         { 0x5804, 0x26 }, { 0x5805, 0x2e }, { 0x5806, 0x11 }, { 0x5807, 0x0c },
 237         { 0x5808, 0x09 }, { 0x5809, 0x0a }, { 0x580a, 0x0e }, { 0x580b, 0x16 },
 238         { 0x580c, 0x06 }, { 0x580d, 0x02 }, { 0x580e, 0x00 }, { 0x580f, 0x00 },
 239         { 0x5810, 0x04 }, { 0x5811, 0x0a }, { 0x5812, 0x05 }, { 0x5813, 0x02 },
 240         { 0x5814, 0x00 }, { 0x5815, 0x00 }, { 0x5816, 0x03 }, { 0x5817, 0x09 },
 241         { 0x5818, 0x0f }, { 0x5819, 0x0a }, { 0x581a, 0x07 }, { 0x581b, 0x08 },
 242         { 0x581c, 0x0b }, { 0x581d, 0x14 }, { 0x581e, 0x28 }, { 0x581f, 0x23 },
 243         { 0x5820, 0x1d }, { 0x5821, 0x1e }, { 0x5822, 0x24 }, { 0x5823, 0x2a },
 244         { 0x5824, 0x4f }, { 0x5825, 0x6f }, { 0x5826, 0x5f }, { 0x5827, 0x7f },
 245         { 0x5828, 0x9f }, { 0x5829, 0x5f }, { 0x582a, 0x8f }, { 0x582b, 0x9e },
 246         { 0x582c, 0x8f }, { 0x582d, 0x9f }, { 0x582e, 0x4f }, { 0x582f, 0x87 },
 247         { 0x5830, 0x86 }, { 0x5831, 0x97 }, { 0x5832, 0xae }, { 0x5833, 0x3f },
 248         { 0x5834, 0x8e }, { 0x5835, 0x7c }, { 0x5836, 0x7e }, { 0x5837, 0xaf },
 249         { 0x5838, 0x8f }, { 0x5839, 0x8f }, { 0x583a, 0x9f }, { 0x583b, 0x7f },
 250         { 0x583c, 0x5f },
 251
 252         /* Y Gamma */
 253         { 0x5480, 0x07 }, { 0x5481, 0x18 }, { 0x5482, 0x2c }, { 0x5483, 0x4e },
 254         { 0x5484, 0x5e }, { 0x5485, 0x6b }, { 0x5486, 0x77 }, { 0x5487, 0x82 },
 255         { 0x5488, 0x8c }, { 0x5489, 0x95 }, { 0x548a, 0xa4 }, { 0x548b, 0xb1 },
 256         { 0x548c, 0xc6 }, { 0x548d, 0xd8 }, { 0x548e, 0xe9 },
 257
 258         /* UV Gamma */
 259         { 0x5490, 0x0f }, { 0x5491, 0xff }, { 0x5492, 0x0d }, { 0x5493, 0x05 },
 260         { 0x5494, 0x07 }, { 0x5495, 0x1a }, { 0x5496, 0x04 }, { 0x5497, 0x01 },
 261         { 0x5498, 0x03 }, { 0x5499, 0x53 }, { 0x549a, 0x02 }, { 0x549b, 0xeb },
 262         { 0x549c, 0x02 }, { 0x549d, 0xa0 }, { 0x549e, 0x02 }, { 0x549f, 0x67 },
 263         { 0x54a0, 0x02 }, { 0x54a1, 0x3b }, { 0x54a2, 0x02 }, { 0x54a3, 0x18 },
 264         { 0x54a4, 0x01 }, { 0x54a5, 0xe7 }, { 0x54a6, 0x01 }, { 0x54a7, 0xc3 },
 265         { 0x54a8, 0x01 }, { 0x54a9, 0x94 }, { 0x54aa, 0x01 }, { 0x54ab, 0x72 },
 266         { 0x54ac, 0x01 }, { 0x54ad, 0x57 },
 267
 268         /* AWB */
 269         { OV9740_AWB_CTRL00,            0xf0 },
 270         { OV9740_AWB_CTRL01,            0x00 },
 271         { OV9740_AWB_CTRL02,            0x41 },
 272         { OV9740_AWB_CTRL03,            0x42 },
 273         { OV9740_AWB_ADV_CTRL01,        0x8a },
 274         { OV9740_AWB_ADV_CTRL02,        0x61 },
 275         { OV9740_AWB_ADV_CTRL03,        0xce },
 276         { OV9740_AWB_ADV_CTRL04,        0xa8 },
 277         { OV9740_AWB_ADV_CTRL05,        0x17 },
 278         { OV9740_AWB_ADV_CTRL06,        0x1f },
 279         { OV9740_AWB_ADV_CTRL07,        0x27 },
 280         { OV9740_AWB_ADV_CTRL08,        0x41 },
 281         { OV9740_AWB_ADV_CTRL09,        0x34 },
 282         { OV9740_AWB_ADV_CTRL10,        0xf0 },
 283         { OV9740_AWB_ADV_CTRL11,        0x10 },
 284         { OV9740_AWB_CTRL0F,            0xff },
 285         { OV9740_AWB_CTRL10,            0x00 },
 286         { OV9740_AWB_CTRL11,            0xff },
 287         { OV9740_AWB_CTRL12,            0x00 },
 288         { OV9740_AWB_CTRL13,            0xff },
 289         { OV9740_AWB_CTRL14,            0x00 },
 290
 291         /* CIP */
 292         { 0x530d, 0x12 },
 293
 294         /* CMX */
 295         { 0x5380, 0x01 }, { 0x5381, 0x00 }, { 0x5382, 0x00 }, { 0x5383, 0x17 },
 296         { 0x5384, 0x00 }, { 0x5385, 0x01 }, { 0x5386, 0x00 }, { 0x5387, 0x00 },
 297         { 0x5388, 0x00 }, { 0x5389, 0xe0 }, { 0x538a, 0x00 }, { 0x538b, 0x20 },
 298         { 0x538c, 0x00 }, { 0x538d, 0x00 }, { 0x538e, 0x00 }, { 0x538f, 0x16 },
 299         { 0x5390, 0x00 }, { 0x5391, 0x9c }, { 0x5392, 0x00 }, { 0x5393, 0xa0 },
 300         { 0x5394, 0x18 },
 301
 302         /* 50/60 Detection */
 303         { 0x3c0a, 0x9c }, { 0x3c0b, 0x3f },
 304
 305         /* Output Select */
 306         { OV9740_IO_OUTPUT_SEL01,       0x00 },
 307         { OV9740_IO_OUTPUT_SEL02,       0x00 },
 308         { OV9740_IO_CREL00,             0x00 },
 309         { OV9740_IO_CREL01,             0x00 },
 310         { OV9740_IO_CREL02,             0x00 },
 311
 312         /* AWB Control */
 313         { OV9740_AWB_MANUAL_CTRL,       0x00 },
 314
 315         /* Analog Control */
 316         { OV9740_ANALOG_CTRL03,         0xaa },
 317         { OV9740_ANALOG_CTRL32,         0x2f },
 318         { OV9740_ANALOG_CTRL20,         0x66 },
 319         { OV9740_ANALOG_CTRL21,         0xc0 },
 320         { OV9740_ANALOG_CTRL31,         0x52 },
 321         { OV9740_ANALOG_CTRL33,         0x50 },
 322         { OV9740_ANALOG_CTRL30,         0xca },
 323         { OV9740_ANALOG_CTRL04,         0x0c },
 324         { OV9740_ANALOG_CTRL01,         0x40 },
 325         { OV9740_ANALOG_CTRL02,         0x16 },
 326         { OV9740_ANALOG_CTRL10,         0xa1 },
 327         { OV9740_ANALOG_CTRL12,         0x24 },
 328         { OV9740_ANALOG_CTRL22,         0x9f },
 329         { OV9740_ANALOG_CTRL15,         0xf0 },
 330
 331         /* Sensor Control */
 332         { OV9740_SENSOR_CTRL03,         0x42 },
 333         { OV9740_SENSOR_CTRL04,         0x10 },
 334         { OV9740_SENSOR_CTRL05,         0x45 },
 335         { OV9740_SENSOR_CTRL07,         0x14 },
 336
 337         /* Timing Control */
 338         { OV9740_TIMING_CTRL33,         0x04 },
 339         { OV9740_TIMING_CTRL35,         0x02 },
 340         { OV9740_TIMING_CTRL19,         0x6e },
 341         { OV9740_TIMING_CTRL17,         0x94 },
 342
 343         /* AEC/AGC Control */
 344         { OV9740_AEC_ENABLE,            0x10 },
 345         { OV9740_GAIN_CEILING_01,       0x00 },
 346         { OV9740_GAIN_CEILING_02,       0x7f },
 347         { OV9740_AEC_HI_THRESHOLD,      0xa0 },
 348         { OV9740_AEC_3A1A,              0x05 },
 349         { OV9740_AEC_CTRL1B_WPT2,       0x50 },
 350         { OV9740_AEC_CTRL0F_WPT,        0x50 },
 351         { OV9740_AEC_CTRL10_BPT,        0x4c },
 352         { OV9740_AEC_CTRL1E_BPT2,       0x4c },
 353         { OV9740_AEC_LO_THRESHOLD,      0x26 },
 354
 355         /* BLC Control */
 356         { OV9740_BLC_AUTO_ENABLE,       0x45 },
 357         { OV9740_BLC_MODE,              0x18 },
 358
 359         /* DVP Control */
 360         { OV9740_DVP_VSYNC_CTRL02,      0x04 },
 361         { OV9740_DVP_VSYNC_MODE,        0x00 },
 362         { OV9740_DVP_VSYNC_CTRL06,      0x08 },
 363
 364         /* PLL Setting */
 365         { OV9740_PLL_MODE_CTRL01,       0x20 },
 366         { OV9740_PRE_PLL_CLK_DIV,       0x03 },
 367         { OV9740_PLL_MULTIPLIER,        0x4c },
 368         { OV9740_VT_SYS_CLK_DIV,        0x01 },
 369         { OV9740_VT_PIX_CLK_DIV,        0x08 },
 370         { OV9740_PLL_CTRL3010,          0x01 },
 371         { OV9740_VFIFO_CTRL00,          0x82 },
 372
 373         /* Timing Setting */
 374         /* VTS */
 375         { OV9740_FRM_LENGTH_LN_HI,      0x03 },
 376         { OV9740_FRM_LENGTH_LN_LO,      0x07 },
 377         /* HTS */
 378         { OV9740_LN_LENGTH_PCK_HI,      0x06 },
 379         { OV9740_LN_LENGTH_PCK_LO,      0x62 },
 380
 381         /* MIPI Control */
 382         { OV9740_MIPI_CTRL00,           0x44 }, /* 0x64 for discontinuous clk */
 383         { OV9740_MIPI_3837,             0x01 },
 384         { OV9740_MIPI_CTRL01,           0x0f },
 385         { OV9740_MIPI_CTRL03,           0x05 },
 386         { OV9740_MIPI_CTRL05,           0x10 },
 387         { OV9740_VFIFO_RD_CTRL,         0x16 },
 388         { OV9740_MIPI_CTRL_3012,        0x70 },
 389         { OV9740_SC_CMMM_MIPI_CTR,      0x01 },
 390
 391         /* YUYV order */
 392         { OV9740_ISP_CTRL19,            0x02 },
 393 };
 394
 395 static enum v4l2_mbus_pixelcode ov9740_codes[] = {
 396         V4L2_MBUS_FMT_YUYV8_2X8,
 397 };
 398
 399 /* read a register */
 400 static int ov9740_reg_read(struct i2c_client *client, u16 reg, u8 *val)
 401 {
 402         int ret;
 403         struct i2c_msg msg[] = {
 404                 {
 405                         .addr   = client->addr,
 406                         .flags  = 0,
 407                         .len    = 2,
 408                         .buf    = (u8 *)&reg,
 409                 },
 410                 {
 411                         .addr   = client->addr,
 412                         .flags  = I2C_M_RD,
 413                         .len    = 1,
 414                         .buf    = val,
 415                 },
 416         };
 417
 418         reg = swab16(reg);
 419
 420         ret = i2c_transfer(client->adapter, msg, 2);
 421         if (ret < 0) {
 422                 dev_err(&client->dev, "Failed reading register 0x%04x!\n", reg);
 423                 return ret;
 424         }
 425
 426         return 0;
 427 }
 428
 429 /* write a register */
 430 static int ov9740_reg_write(struct i2c_client *client, u16 reg, u8 val)
 431 {
 432         struct i2c_msg msg;
 433         struct {
 434                 u16 reg;
 435                 u8 val;
 436         } __packed buf;
 437         int ret;
 438
 439         reg = swab16(reg);
 440
 441         buf.reg = reg;
 442         buf.val = val;
 443
 444         msg.addr        = client->addr;
 445         msg.flags       = 0;
 446         msg.len         = 3;
 447         msg.buf         = (u8 *)&buf;
 448
 449         ret = i2c_transfer(client->adapter, &msg, 1);
 450         if (ret < 0) {
 451                 dev_err(&client->dev, "Failed writing register 0x%04x!\n", reg);
 452                 return ret;
 453         }
 454
 455         return 0;
 456 }
 457
 458
 459 /* Read a register, alter its bits, write it back */
 460 static int ov9740_reg_rmw(struct i2c_client *client, u16 reg, u8 set, u8 unset)
 461 {
 462         u8 val;
 463         int ret;
 464
 465         ret = ov9740_reg_read(client, reg, &val);
 466         if (ret < 0) {
 467                 dev_err(&client->dev,
 468                         "[Read]-Modify-Write of register 0x%04x failed!\n",
 469                         reg);
 470                 return ret;
 471         }
 472
 473         val |= set;
 474         val &= ~unset;
 475
 476         ret = ov9740_reg_write(client, reg, val);
 477         if (ret < 0) {
 478                 dev_err(&client->dev,
 479                         "Read-Modify-[Write] of register 0x%04x failed!\n",
 480                         reg);
 481                 return ret;
 482         }
 483
 484         return 0;
 485 }
 486
 487 static int ov9740_reg_write_array(struct i2c_client *client,
 488                                   const struct ov9740_reg *regarray,
 489                                   int regarraylen)
 490 {
 491         int i;
 492         int ret;
 493
 494         for (i = 0; i < regarraylen; i++) {
 495                 ret = ov9740_reg_write(client,
 496                                        regarray[i].reg, regarray[i].val);
 497                 if (ret < 0)
 498                         return ret;
 499         }
 500
 501         return 0;
 502 }
 503
 504 /* Start/Stop streaming from the device */
 505 static int ov9740_s_stream(struct v4l2_subdev *sd, int enable)
 506 {
 507         struct i2c_client *client = v4l2_get_subdevdata(sd);
 508         struct ov9740_priv *priv = to_ov9740(sd);
 509         int ret;
 510
 511         /* Program orientation register. */
 512         if (priv->flag_vflip)
 513                 ret = ov9740_reg_rmw(client, OV9740_IMAGE_ORT, 0x2, 0);
 514         else
 515                 ret = ov9740_reg_rmw(client, OV9740_IMAGE_ORT, 0, 0x2);
 516         if (ret < 0)
 517                 return ret;
 518
 519         if (priv->flag_hflip)
 520                 ret = ov9740_reg_rmw(client, OV9740_IMAGE_ORT, 0x1, 0);
 521         else
 522                 ret = ov9740_reg_rmw(client, OV9740_IMAGE_ORT, 0, 0x1);
 523         if (ret < 0)
 524                 return ret;
 525
 526         if (enable) {
 527                 dev_dbg(&client->dev, "Enabling Streaming\n");
 528                 /* Start Streaming */
 529                 ret = ov9740_reg_write(client, OV9740_MODE_SELECT, 0x01);
 530
 531         } else {
 532                 dev_dbg(&client->dev, "Disabling Streaming\n");
 533                 /* Software Reset */
 534                 ret = ov9740_reg_write(client, OV9740_SOFTWARE_RESET, 0x01);
 535                 if (!ret)
 536                         /* Setting Streaming to Standby */
 537                         ret = ov9740_reg_write(client, OV9740_MODE_SELECT,
 538                                                0x00);
 539         }
 540
 541         priv->current_enable = enable;
 542
 543         return ret;
 544 }
 545
 546 /* select nearest higher resolution for capture */
 547 static void ov9740_res_roundup(u32 *width, u32 *height)
 548 {
 549         /* Width must be a multiple of 4 pixels. */
 550         *width = ALIGN(*width, 4);
 551
 552         /* Max resolution is 1280x720 (720p). */
 553         if (*width > OV9740_MAX_WIDTH)
 554                 *width = OV9740_MAX_WIDTH;
 555
 556         if (*height > OV9740_MAX_HEIGHT)
 557                 *height = OV9740_MAX_HEIGHT;
 558 }
 559
 560 /* Setup registers according to resolution and color encoding */
 561 static int ov9740_set_res(struct i2c_client *client, u32 width, u32 height)
 562 {
 563         u32 x_start;
 564         u32 y_start;
 565         u32 x_end;
 566         u32 y_end;
 567         bool scaling = 0;
 568         u32 scale_input_x;
 569         u32 scale_input_y;
 570         int ret;
 571
 572         if ((width != OV9740_MAX_WIDTH) || (height != OV9740_MAX_HEIGHT))
 573                 scaling = 1;
 574
 575         /*
 576          * Try to use as much of the sensor area as possible when supporting
 577          * smaller resolutions.  Depending on the aspect ratio of the
 578          * chosen resolution, we can either use the full width of the sensor,
 579          * or the full height of the sensor (or both if the aspect ratio is
 580          * the same as 1280x720.
 581          */
 582         if ((OV9740_MAX_WIDTH * height) > (OV9740_MAX_HEIGHT * width)) {
 583                 scale_input_x = (OV9740_MAX_HEIGHT * width) / height;
 584                 scale_input_y = OV9740_MAX_HEIGHT;
 585         } else {
 586                 scale_input_x = OV9740_MAX_WIDTH;
 587                 scale_input_y = (OV9740_MAX_WIDTH * height) / width;
 588         }
 589
 590         /* These describe the area of the sensor to use. */
 591         x_start = (OV9740_MAX_WIDTH - scale_input_x) / 2;
 592         y_start = (OV9740_MAX_HEIGHT - scale_input_y) / 2;
 593         x_end = x_start + scale_input_x - 1;
 594         y_end = y_start + scale_input_y - 1;
 595
 596         ret = ov9740_reg_write(client, OV9740_X_ADDR_START_HI, x_start >> 8);
 597         if (ret)
 598                 goto done;
 599         ret = ov9740_reg_write(client, OV9740_X_ADDR_START_LO, x_start & 0xff);
 600         if (ret)
 601                 goto done;
 602         ret = ov9740_reg_write(client, OV9740_Y_ADDR_START_HI, y_start >> 8);
 603         if (ret)
 604                 goto done;
 605         ret = ov9740_reg_write(client, OV9740_Y_ADDR_START_LO, y_start & 0xff);
 606         if (ret)
 607                 goto done;
 608
 609         ret = ov9740_reg_write(client, OV9740_X_ADDR_END_HI, x_end >> 8);
 610         if (ret)
 611                 goto done;
 612         ret = ov9740_reg_write(client, OV9740_X_ADDR_END_LO, x_end & 0xff);
 613         if (ret)
 614                 goto done;
 615         ret = ov9740_reg_write(client, OV9740_Y_ADDR_END_HI, y_end >> 8);
 616         if (ret)
 617                 goto done;
 618         ret = ov9740_reg_write(client, OV9740_Y_ADDR_END_LO, y_end & 0xff);
 619         if (ret)
 620                 goto done;
 621
 622         ret = ov9740_reg_write(client, OV9740_X_OUTPUT_SIZE_HI, width >> 8);
 623         if (ret)
 624                 goto done;
 625         ret = ov9740_reg_write(client, OV9740_X_OUTPUT_SIZE_LO, width & 0xff);
 626         if (ret)
 627                 goto done;
 628         ret = ov9740_reg_write(client, OV9740_Y_OUTPUT_SIZE_HI, height >> 8);
 629         if (ret)
 630                 goto done;
 631         ret = ov9740_reg_write(client, OV9740_Y_OUTPUT_SIZE_LO, height & 0xff);
 632         if (ret)
 633                 goto done;
 634
 635         ret = ov9740_reg_write(client, OV9740_ISP_CTRL1E, scale_input_x >> 8);
 636         if (ret)
 637                 goto done;
 638         ret = ov9740_reg_write(client, OV9740_ISP_CTRL1F, scale_input_x & 0xff);
 639         if (ret)
 640                 goto done;
 641         ret = ov9740_reg_write(client, OV9740_ISP_CTRL20, scale_input_y >> 8);
 642         if (ret)
 643                 goto done;
 644         ret = ov9740_reg_write(client, OV9740_ISP_CTRL21, scale_input_y & 0xff);
 645         if (ret)
 646                 goto done;
 647
 648         ret = ov9740_reg_write(client, OV9740_VFIFO_READ_START_HI,
 649                                (scale_input_x - width) >> 8);
 650         if (ret)
 651                 goto done;
 652         ret = ov9740_reg_write(client, OV9740_VFIFO_READ_START_LO,
 653                                (scale_input_x - width) & 0xff);
 654         if (ret)
 655                 goto done;
 656
 657         ret = ov9740_reg_write(client, OV9740_ISP_CTRL00, 0xff);
 658         if (ret)
 659                 goto done;
 660         ret = ov9740_reg_write(client, OV9740_ISP_CTRL01, 0xef |
 661                                                           (scaling << 4));
 662         if (ret)
 663                 goto done;
 664         ret = ov9740_reg_write(client, OV9740_ISP_CTRL03, 0xff);
 665
 666 done:
 667         return ret;
 668 }
 669
 670 /* set the format we will capture in */
 671 static int ov9740_s_fmt(struct v4l2_subdev *sd,
 672                         struct v4l2_mbus_framefmt *mf)
 673 {
 674         struct i2c_client *client = v4l2_get_subdevdata(sd);
 675         struct ov9740_priv *priv = to_ov9740(sd);
 676         enum v4l2_colorspace cspace;
 677         enum v4l2_mbus_pixelcode code = mf->code;
 678         int ret;
 679
 680         ov9740_res_roundup(&mf->width, &mf->height);
 681
 682         switch (code) {
 683         case V4L2_MBUS_FMT_YUYV8_2X8:
 684                 cspace = V4L2_COLORSPACE_SRGB;
 685                 break;
 686         default:
 687                 return -EINVAL;
 688         }
 689
 690         ret = ov9740_reg_write_array(client, ov9740_defaults,
 691                                      ARRAY_SIZE(ov9740_defaults));
 692         if (ret < 0)
 693                 return ret;
 694
 695         ret = ov9740_set_res(client, mf->width, mf->height);
 696         if (ret < 0)
 697                 return ret;
 698
 699         mf->code        = code;
 700         mf->colorspace  = cspace;
 701
 702         memcpy(&priv->current_mf, mf, sizeof(struct v4l2_mbus_framefmt));
 703
 704         return ret;
 705 }
 706
 707 static int ov9740_try_fmt(struct v4l2_subdev *sd,
 708                           struct v4l2_mbus_framefmt *mf)
 709 {
 710         ov9740_res_roundup(&mf->width, &mf->height);
 711
 712         mf->field = V4L2_FIELD_NONE;
 713         mf->code = V4L2_MBUS_FMT_YUYV8_2X8;
 714         mf->colorspace = V4L2_COLORSPACE_SRGB;
 715
 716         return 0;
 717 }
 718
 719 static int ov9740_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 720                            enum v4l2_mbus_pixelcode *code)
 721 {
 722         if (index >= ARRAY_SIZE(ov9740_codes))
 723                 return -EINVAL;
 724
 725         *code = ov9740_codes[index];
 726
 727         return 0;
 728 }
 729
 730 static int ov9740_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 731 {
 732         a->bounds.left          = 0;
 733         a->bounds.top           = 0;
 734         a->bounds.width         = OV9740_MAX_WIDTH;
 735         a->bounds.height        = OV9740_MAX_HEIGHT;
 736         a->defrect              = a->bounds;
 737         a->type                 = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 738         a->pixelaspect.numerator        = 1;
 739         a->pixelaspect.denominator      = 1;
 740
 741         return 0;
 742 }
 743
 744 static int ov9740_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 745 {
 746         a->c.left               = 0;
 747         a->c.top                = 0;
 748         a->c.width              = OV9740_MAX_WIDTH;
 749         a->c.height             = OV9740_MAX_HEIGHT;
 750         a->type                 = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 751
 752         return 0;
 753 }
 754
 755 /* Set status of additional camera capabilities */
 756 static int ov9740_s_ctrl(struct v4l2_ctrl *ctrl)
 757 {
 758         struct ov9740_priv *priv =
 759                 container_of(ctrl->handler, struct ov9740_priv, hdl);
 760
 761         switch (ctrl->id) {
 762         case V4L2_CID_VFLIP:
 763                 priv->flag_vflip = ctrl->val;
 764                 break;
 765         case V4L2_CID_HFLIP:
 766                 priv->flag_hflip = ctrl->val;
 767                 break;
 768         default:
 769                 return -EINVAL;
 770         }
 771
 772         return 0;
 773 }
 774
 775 /* Get chip identification */
 776 static int ov9740_g_chip_ident(struct v4l2_subdev *sd,
 777                                struct v4l2_dbg_chip_ident *id)
 778 {
 779         struct ov9740_priv *priv = to_ov9740(sd);
 780
 781         id->ident = priv->ident;
 782         id->revision = priv->revision;
 783
 784         return 0;
 785 }
 786
 787 static int ov9740_s_power(struct v4l2_subdev *sd, int on)
 788 {
 789         struct ov9740_priv *priv = to_ov9740(sd);
 790
 791         if (!priv->current_enable)
 792                 return 0;
 793
 794         if (on) {
 795                 ov9740_s_fmt(sd, &priv->current_mf);
 796                 ov9740_s_stream(sd, priv->current_enable);
 797         } else {
 798                 ov9740_s_stream(sd, 0);
 799                 priv->current_enable = true;
 800         }
 801
 802         return 0;
 803 }
 804
 805 #ifdef CONFIG_VIDEO_ADV_DEBUG
 806 static int ov9740_get_register(struct v4l2_subdev *sd,
 807                                struct v4l2_dbg_register *reg)
 808 {
 809         struct i2c_client *client = v4l2_get_subdevdata(sd);
 810         int ret;
 811         u8 val;
 812
 813         if (reg->reg & ~0xffff)
 814                 return -EINVAL;
 815
 816         reg->size = 2;
 817
 818         ret = ov9740_reg_read(client, reg->reg, &val);
 819         if (ret)
 820                 return ret;
 821
 822         reg->val = (__u64)val;
 823
 824         return ret;
 825 }
 826
 827 static int ov9740_set_register(struct v4l2_subdev *sd,
 828                                struct v4l2_dbg_register *reg)
 829 {
 830         struct i2c_client *client = v4l2_get_subdevdata(sd);
 831
 832         if (reg->reg & ~0xffff || reg->val & ~0xff)
 833                 return -EINVAL;
 834
 835         return ov9740_reg_write(client, reg->reg, reg->val);
 836 }
 837 #endif
 838
 839 static int ov9740_video_probe(struct i2c_client *client)
 840 {
 841         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 842         struct ov9740_priv *priv = to_ov9740(sd);
 843         u8 modelhi, modello;
 844         int ret;
 845
 846         /*
 847          * check and show product ID and manufacturer ID
 848          */
 849         ret = ov9740_reg_read(client, OV9740_MODEL_ID_HI, &modelhi);
 850         if (ret < 0)
 851                 goto err;
 852
 853         ret = ov9740_reg_read(client, OV9740_MODEL_ID_LO, &modello);
 854         if (ret < 0)
 855                 goto err;
 856
 857         priv->model = (modelhi << 8) | modello;
 858
 859         ret = ov9740_reg_read(client, OV9740_REVISION_NUMBER, &priv->revision);
 860         if (ret < 0)
 861                 goto err;
 862
 863         ret = ov9740_reg_read(client, OV9740_MANUFACTURER_ID, &priv->manid);
 864         if (ret < 0)
 865                 goto err;
 866
 867         ret = ov9740_reg_read(client, OV9740_SMIA_VERSION, &priv->smiaver);
 868         if (ret < 0)
 869                 goto err;
 870
 871         if (priv->model != 0x9740) {
 872                 ret = -ENODEV;
 873                 goto err;
 874         }
 875
 876         priv->ident = V4L2_IDENT_OV9740;
 877
 878         dev_info(&client->dev, "ov9740 Model ID 0x%04x, Revision 0x%02x, "
 879                  "Manufacturer 0x%02x, SMIA Version 0x%02x\n",
 880                  priv->model, priv->revision, priv->manid, priv->smiaver);
 881
 882 err:
 883         return ret;
 884 }
 885
 886 /* Request bus settings on camera side */
 887 static int ov9740_g_mbus_config(struct v4l2_subdev *sd,
 888                                 struct v4l2_mbus_config *cfg)
 889 {
 890         struct i2c_client *client = v4l2_get_subdevdata(sd);
 891         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 892
 893         cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
 894                 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_HIGH |
 895                 V4L2_MBUS_DATA_ACTIVE_HIGH;
 896         cfg->type = V4L2_MBUS_PARALLEL;
 897         cfg->flags = soc_camera_apply_board_flags(icl, cfg);
 898
 899         return 0;
 900 }
 901
 902 static struct v4l2_subdev_video_ops ov9740_video_ops = {
 903         .s_stream       = ov9740_s_stream,
 904         .s_mbus_fmt     = ov9740_s_fmt,
 905         .try_mbus_fmt   = ov9740_try_fmt,
 906         .enum_mbus_fmt  = ov9740_enum_fmt,
 907         .cropcap        = ov9740_cropcap,
 908         .g_crop         = ov9740_g_crop,
 909         .g_mbus_config  = ov9740_g_mbus_config,
 910 };
 911
 912 static struct v4l2_subdev_core_ops ov9740_core_ops = {
 913         .g_chip_ident           = ov9740_g_chip_ident,
 914         .s_power                = ov9740_s_power,
 915 #ifdef CONFIG_VIDEO_ADV_DEBUG
 916         .g_register             = ov9740_get_register,
 917         .s_register             = ov9740_set_register,
 918 #endif
 919 };
 920
 921 static struct v4l2_subdev_ops ov9740_subdev_ops = {
 922         .core                   = &ov9740_core_ops,
 923         .video                  = &ov9740_video_ops,
 924 };
 925
 926 static const struct v4l2_ctrl_ops ov9740_ctrl_ops = {
 927         .s_ctrl = ov9740_s_ctrl,
 928 };
 929
 930 /*
 931  * i2c_driver function
 932  */
 933 static int ov9740_probe(struct i2c_client *client,
 934                         const struct i2c_device_id *did)
 935 {
 936         struct ov9740_priv *priv;
 937         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 938         int ret;
 939
 940         if (!icl) {
 941                 dev_err(&client->dev, "Missing platform_data for driver\n");
 942                 return -EINVAL;
 943         }
 944
 945         priv = kzalloc(sizeof(struct ov9740_priv), GFP_KERNEL);
 946         if (!priv) {
 947                 dev_err(&client->dev, "Failed to allocate private data!\n");
 948                 return -ENOMEM;
 949         }
 950
 951         v4l2_i2c_subdev_init(&priv->subdev, client, &ov9740_subdev_ops);
 952         v4l2_ctrl_handler_init(&priv->hdl, 13);
 953         v4l2_ctrl_new_std(&priv->hdl, &ov9740_ctrl_ops,
 954                         V4L2_CID_VFLIP, 0, 1, 1, 0);
 955         v4l2_ctrl_new_std(&priv->hdl, &ov9740_ctrl_ops,
 956                         V4L2_CID_HFLIP, 0, 1, 1, 0);
 957         priv->subdev.ctrl_handler = &priv->hdl;
 958         if (priv->hdl.error) {
 959                 int err = priv->hdl.error;
 960
 961                 kfree(priv);
 962                 return err;
 963         }
 964
 965         ret = ov9740_video_probe(client);
 966         if (!ret)
 967                 ret = v4l2_ctrl_handler_setup(&priv->hdl);
 968         if (ret < 0) {
 969                 v4l2_ctrl_handler_free(&priv->hdl);
 970                 kfree(priv);
 971         }
 972
 973         return ret;
 974 }
 975
 976 static int ov9740_remove(struct i2c_client *client)
 977 {
 978         struct ov9740_priv *priv = i2c_get_clientdata(client);
 979
 980         v4l2_device_unregister_subdev(&priv->subdev);
 981         v4l2_ctrl_handler_free(&priv->hdl);
 982         kfree(priv);
 983         return 0;
 984 }
 985
 986 static const struct i2c_device_id ov9740_id[] = {
 987         { "ov9740", 0 },
 988         { }
 989 };
 990 MODULE_DEVICE_TABLE(i2c, ov9740_id);
 991
 992 static struct i2c_driver ov9740_i2c_driver = {
 993         .driver = {
 994                 .name = "ov9740",
 995         },
 996         .probe    = ov9740_probe,
 997         .remove   = ov9740_remove,
 998         .id_table = ov9740_id,
 999 };
1000
1001 static int __init ov9740_module_init(void)
1002 {
1003         return i2c_add_driver(&ov9740_i2c_driver);
1004 }
1005
1006 static void __exit ov9740_module_exit(void)
1007 {
1008         i2c_del_driver(&ov9740_i2c_driver);
1009 }
1010
1011 module_init(ov9740_module_init);
1012 module_exit(ov9740_module_exit);
1013
1014 MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV9740");
1015 MODULE_AUTHOR("Andrew Chew <achew@nvidia.com>");
1016 MODULE_LICENSE("GPL v2");