drivers/media/i2c/ov2640.c

   1 /*
   2  * ov2640 Camera Driver
   3  *
   4  * Copyright (C) 2010 Alberto Panizzo <maramaopercheseimorto@gmail.com>
   5  *
   6  * Based on ov772x, ov9640 drivers and previous non merged implementations.
   7  *
   8  * Copyright 2005-2009 Freescale Semiconductor, Inc. All Rights Reserved.
   9  * Copyright (C) 2006, OmniVision
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/module.h>
  18 #include <linux/i2c.h>
  19 #include <linux/clk.h>
  20 #include <linux/slab.h>
  21 #include <linux/delay.h>
  22 #include <linux/gpio.h>
  23 #include <linux/gpio/consumer.h>
  24 #include <linux/of_gpio.h>
  25 #include <linux/v4l2-mediabus.h>
  26 #include <linux/videodev2.h>
  27
  28 #include <media/v4l2-device.h>
  29 #include <media/v4l2-subdev.h>
  30 #include <media/v4l2-ctrls.h>
  31 #include <media/v4l2-image-sizes.h>
  32
  33 #define VAL_SET(x, mask, rshift, lshift)  \
  34                 ((((x) >> rshift) & mask) << lshift)
  35 /*
  36  * DSP registers
  37  * register offset for BANK_SEL == BANK_SEL_DSP
  38  */
  39 #define R_BYPASS    0x05 /* Bypass DSP */
  40 #define   R_BYPASS_DSP_BYPAS    0x01 /* Bypass DSP, sensor out directly */
  41 #define   R_BYPASS_USE_DSP      0x00 /* Use the internal DSP */
  42 #define QS          0x44 /* Quantization Scale Factor */
  43 #define CTRLI       0x50
  44 #define   CTRLI_LP_DP           0x80
  45 #define   CTRLI_ROUND           0x40
  46 #define   CTRLI_V_DIV_SET(x)    VAL_SET(x, 0x3, 0, 3)
  47 #define   CTRLI_H_DIV_SET(x)    VAL_SET(x, 0x3, 0, 0)
  48 #define HSIZE       0x51 /* H_SIZE[7:0] (real/4) */
  49 #define   HSIZE_SET(x)          VAL_SET(x, 0xFF, 2, 0)
  50 #define VSIZE       0x52 /* V_SIZE[7:0] (real/4) */
  51 #define   VSIZE_SET(x)          VAL_SET(x, 0xFF, 2, 0)
  52 #define XOFFL       0x53 /* OFFSET_X[7:0] */
  53 #define   XOFFL_SET(x)          VAL_SET(x, 0xFF, 0, 0)
  54 #define YOFFL       0x54 /* OFFSET_Y[7:0] */
  55 #define   YOFFL_SET(x)          VAL_SET(x, 0xFF, 0, 0)
  56 #define VHYX        0x55 /* Offset and size completion */
  57 #define   VHYX_VSIZE_SET(x)     VAL_SET(x, 0x1, (8+2), 7)
  58 #define   VHYX_HSIZE_SET(x)     VAL_SET(x, 0x1, (8+2), 3)
  59 #define   VHYX_YOFF_SET(x)      VAL_SET(x, 0x3, 8, 4)
  60 #define   VHYX_XOFF_SET(x)      VAL_SET(x, 0x3, 8, 0)
  61 #define DPRP        0x56
  62 #define TEST        0x57 /* Horizontal size completion */
  63 #define   TEST_HSIZE_SET(x)     VAL_SET(x, 0x1, (9+2), 7)
  64 #define ZMOW        0x5A /* Zoom: Out Width  OUTW[7:0] (real/4) */
  65 #define   ZMOW_OUTW_SET(x)      VAL_SET(x, 0xFF, 2, 0)
  66 #define ZMOH        0x5B /* Zoom: Out Height OUTH[7:0] (real/4) */
  67 #define   ZMOH_OUTH_SET(x)      VAL_SET(x, 0xFF, 2, 0)
  68 #define ZMHH        0x5C /* Zoom: Speed and H&W completion */
  69 #define   ZMHH_ZSPEED_SET(x)    VAL_SET(x, 0x0F, 0, 4)
  70 #define   ZMHH_OUTH_SET(x)      VAL_SET(x, 0x1, (8+2), 2)
  71 #define   ZMHH_OUTW_SET(x)      VAL_SET(x, 0x3, (8+2), 0)
  72 #define BPADDR      0x7C /* SDE Indirect Register Access: Address */
  73 #define BPDATA      0x7D /* SDE Indirect Register Access: Data */
  74 #define CTRL2       0x86 /* DSP Module enable 2 */
  75 #define   CTRL2_DCW_EN          0x20
  76 #define   CTRL2_SDE_EN          0x10
  77 #define   CTRL2_UV_ADJ_EN       0x08
  78 #define   CTRL2_UV_AVG_EN       0x04
  79 #define   CTRL2_CMX_EN          0x01
  80 #define CTRL3       0x87 /* DSP Module enable 3 */
  81 #define   CTRL3_BPC_EN          0x80
  82 #define   CTRL3_WPC_EN          0x40
  83 #define SIZEL       0x8C /* Image Size Completion */
  84 #define   SIZEL_HSIZE8_11_SET(x) VAL_SET(x, 0x1, 11, 6)
  85 #define   SIZEL_HSIZE8_SET(x)    VAL_SET(x, 0x7, 0, 3)
  86 #define   SIZEL_VSIZE8_SET(x)    VAL_SET(x, 0x7, 0, 0)
  87 #define HSIZE8      0xC0 /* Image Horizontal Size HSIZE[10:3] */
  88 #define   HSIZE8_SET(x)         VAL_SET(x, 0xFF, 3, 0)
  89 #define VSIZE8      0xC1 /* Image Vertical Size VSIZE[10:3] */
  90 #define   VSIZE8_SET(x)         VAL_SET(x, 0xFF, 3, 0)
  91 #define CTRL0       0xC2 /* DSP Module enable 0 */
  92 #define   CTRL0_AEC_EN       0x80
  93 #define   CTRL0_AEC_SEL      0x40
  94 #define   CTRL0_STAT_SEL     0x20
  95 #define   CTRL0_VFIRST       0x10
  96 #define   CTRL0_YUV422       0x08
  97 #define   CTRL0_YUV_EN       0x04
  98 #define   CTRL0_RGB_EN       0x02
  99 #define   CTRL0_RAW_EN       0x01
 100 #define CTRL1       0xC3 /* DSP Module enable 1 */
 101 #define   CTRL1_CIP          0x80
 102 #define   CTRL1_DMY          0x40
 103 #define   CTRL1_RAW_GMA      0x20
 104 #define   CTRL1_DG           0x10
 105 #define   CTRL1_AWB          0x08
 106 #define   CTRL1_AWB_GAIN     0x04
 107 #define   CTRL1_LENC         0x02
 108 #define   CTRL1_PRE          0x01
 109 /*      REG 0xC7 (unknown name): affects Auto White Balance (AWB)
 110  *        AWB_OFF            0x40
 111  *        AWB_SIMPLE         0x10
 112  *        AWB_ON             0x00       (Advanced AWB ?) */
 113 #define R_DVP_SP    0xD3 /* DVP output speed control */
 114 #define   R_DVP_SP_AUTO_MODE 0x80
 115 #define   R_DVP_SP_DVP_MASK  0x3F /* DVP PCLK = sysclk (48)/[6:0] (YUV0);
 116                                    *          = sysclk (48)/(2*[6:0]) (RAW);*/
 117 #define IMAGE_MODE  0xDA /* Image Output Format Select */
 118 #define   IMAGE_MODE_Y8_DVP_EN   0x40
 119 #define   IMAGE_MODE_JPEG_EN     0x10
 120 #define   IMAGE_MODE_YUV422      0x00
 121 #define   IMAGE_MODE_RAW10       0x04 /* (DVP) */
 122 #define   IMAGE_MODE_RGB565      0x08
 123 #define   IMAGE_MODE_HREF_VSYNC  0x02 /* HREF timing select in DVP JPEG output
 124                                        * mode (0 for HREF is same as sensor) */
 125 #define   IMAGE_MODE_LBYTE_FIRST 0x01 /* Byte swap enable for DVP
 126                                        *    1: Low byte first UYVY (C2[4] =0)
 127                                        *        VYUY (C2[4] =1)
 128                                        *    0: High byte first YUYV (C2[4]=0)
 129                                        *        YVYU (C2[4] = 1) */
 130 #define RESET       0xE0 /* Reset */
 131 #define   RESET_MICROC       0x40
 132 #define   RESET_SCCB         0x20
 133 #define   RESET_JPEG         0x10
 134 #define   RESET_DVP          0x04
 135 #define   RESET_IPU          0x02
 136 #define   RESET_CIF          0x01
 137 #define REGED       0xED /* Register ED */
 138 #define   REGED_CLK_OUT_DIS  0x10
 139 #define MS_SP       0xF0 /* SCCB Master Speed */
 140 #define SS_ID       0xF7 /* SCCB Slave ID */
 141 #define SS_CTRL     0xF8 /* SCCB Slave Control */
 142 #define   SS_CTRL_ADD_AUTO_INC  0x20
 143 #define   SS_CTRL_EN            0x08
 144 #define   SS_CTRL_DELAY_CLK     0x04
 145 #define   SS_CTRL_ACC_EN        0x02
 146 #define   SS_CTRL_SEN_PASS_THR  0x01
 147 #define MC_BIST     0xF9 /* Microcontroller misc register */
 148 #define   MC_BIST_RESET           0x80 /* Microcontroller Reset */
 149 #define   MC_BIST_BOOT_ROM_SEL    0x40
 150 #define   MC_BIST_12KB_SEL        0x20
 151 #define   MC_BIST_12KB_MASK       0x30
 152 #define   MC_BIST_512KB_SEL       0x08
 153 #define   MC_BIST_512KB_MASK      0x0C
 154 #define   MC_BIST_BUSY_BIT_R      0x02
 155 #define   MC_BIST_MC_RES_ONE_SH_W 0x02
 156 #define   MC_BIST_LAUNCH          0x01
 157 #define BANK_SEL    0xFF /* Register Bank Select */
 158 #define   BANK_SEL_DSP     0x00
 159 #define   BANK_SEL_SENS    0x01
 160
 161 /*
 162  * Sensor registers
 163  * register offset for BANK_SEL == BANK_SEL_SENS
 164  */
 165 #define GAIN        0x00 /* AGC - Gain control gain setting */
 166 #define COM1        0x03 /* Common control 1 */
 167 #define   COM1_1_DUMMY_FR          0x40
 168 #define   COM1_3_DUMMY_FR          0x80
 169 #define   COM1_7_DUMMY_FR          0xC0
 170 #define   COM1_VWIN_LSB_UXGA       0x0F
 171 #define   COM1_VWIN_LSB_SVGA       0x0A
 172 #define   COM1_VWIN_LSB_CIF        0x06
 173 #define REG04       0x04 /* Register 04 */
 174 #define   REG04_DEF             0x20 /* Always set */
 175 #define   REG04_HFLIP_IMG       0x80 /* Horizontal mirror image ON/OFF */
 176 #define   REG04_VFLIP_IMG       0x40 /* Vertical flip image ON/OFF */
 177 #define   REG04_VREF_EN         0x10
 178 #define   REG04_HREF_EN         0x08
 179 #define   REG04_AEC_SET(x)      VAL_SET(x, 0x3, 0, 0)
 180 #define REG08       0x08 /* Frame Exposure One-pin Control Pre-charge Row Num */
 181 #define COM2        0x09 /* Common control 2 */
 182 #define   COM2_SOFT_SLEEP_MODE  0x10 /* Soft sleep mode */
 183                                      /* Output drive capability */
 184 #define   COM2_OCAP_Nx_SET(N)   (((N) - 1) & 0x03) /* N = [1x .. 4x] */
 185 #define PID         0x0A /* Product ID Number MSB */
 186 #define VER         0x0B /* Product ID Number LSB */
 187 #define COM3        0x0C /* Common control 3 */
 188 #define   COM3_BAND_50H        0x04 /* 0 For Banding at 60H */
 189 #define   COM3_BAND_AUTO       0x02 /* Auto Banding */
 190 #define   COM3_SING_FR_SNAPSH  0x01 /* 0 For enable live video output after the
 191                                      * snapshot sequence*/
 192 #define AEC         0x10 /* AEC[9:2] Exposure Value */
 193 #define CLKRC       0x11 /* Internal clock */
 194 #define   CLKRC_EN             0x80
 195 #define   CLKRC_DIV_SET(x)     (((x) - 1) & 0x1F) /* CLK = XVCLK/(x) */
 196 #define COM7        0x12 /* Common control 7 */
 197 #define   COM7_SRST            0x80 /* Initiates system reset. All registers are
 198                                      * set to factory default values after which
 199                                      * the chip resumes normal operation */
 200 #define   COM7_RES_UXGA        0x00 /* Resolution selectors for UXGA */
 201 #define   COM7_RES_SVGA        0x40 /* SVGA */
 202 #define   COM7_RES_CIF         0x20 /* CIF */
 203 #define   COM7_ZOOM_EN         0x04 /* Enable Zoom mode */
 204 #define   COM7_COLOR_BAR_TEST  0x02 /* Enable Color Bar Test Pattern */
 205 #define COM8        0x13 /* Common control 8 */
 206 #define   COM8_DEF             0xC0
 207 #define   COM8_BNDF_EN         0x20 /* Banding filter ON/OFF */
 208 #define   COM8_AGC_EN          0x04 /* AGC Auto/Manual control selection */
 209 #define   COM8_AEC_EN          0x01 /* Auto/Manual Exposure control */
 210 #define COM9        0x14 /* Common control 9
 211                           * Automatic gain ceiling - maximum AGC value [7:5]*/
 212 #define   COM9_AGC_GAIN_2x     0x00 /* 000 :   2x */
 213 #define   COM9_AGC_GAIN_4x     0x20 /* 001 :   4x */
 214 #define   COM9_AGC_GAIN_8x     0x40 /* 010 :   8x */
 215 #define   COM9_AGC_GAIN_16x    0x60 /* 011 :  16x */
 216 #define   COM9_AGC_GAIN_32x    0x80 /* 100 :  32x */
 217 #define   COM9_AGC_GAIN_64x    0xA0 /* 101 :  64x */
 218 #define   COM9_AGC_GAIN_128x   0xC0 /* 110 : 128x */
 219 #define COM10       0x15 /* Common control 10 */
 220 #define   COM10_PCLK_HREF      0x20 /* PCLK output qualified by HREF */
 221 #define   COM10_PCLK_RISE      0x10 /* Data is updated at the rising edge of
 222                                      * PCLK (user can latch data at the next
 223                                      * falling edge of PCLK).
 224                                      * 0 otherwise. */
 225 #define   COM10_HREF_INV       0x08 /* Invert HREF polarity:
 226                                      * HREF negative for valid data*/
 227 #define   COM10_VSINC_INV      0x02 /* Invert VSYNC polarity */
 228 #define HSTART      0x17 /* Horizontal Window start MSB 8 bit */
 229 #define HEND        0x18 /* Horizontal Window end MSB 8 bit */
 230 #define VSTART      0x19 /* Vertical Window start MSB 8 bit */
 231 #define VEND        0x1A /* Vertical Window end MSB 8 bit */
 232 #define MIDH        0x1C /* Manufacturer ID byte - high */
 233 #define MIDL        0x1D /* Manufacturer ID byte - low  */
 234 #define AEW         0x24 /* AGC/AEC - Stable operating region (upper limit) */
 235 #define AEB         0x25 /* AGC/AEC - Stable operating region (lower limit) */
 236 #define VV          0x26 /* AGC/AEC Fast mode operating region */
 237 #define   VV_HIGH_TH_SET(x)      VAL_SET(x, 0xF, 0, 4)
 238 #define   VV_LOW_TH_SET(x)       VAL_SET(x, 0xF, 0, 0)
 239 #define REG2A       0x2A /* Dummy pixel insert MSB */
 240 #define FRARL       0x2B /* Dummy pixel insert LSB */
 241 #define ADDVFL      0x2D /* LSB of insert dummy lines in Vertical direction */
 242 #define ADDVFH      0x2E /* MSB of insert dummy lines in Vertical direction */
 243 #define YAVG        0x2F /* Y/G Channel Average value */
 244 #define REG32       0x32 /* Common Control 32 */
 245 #define   REG32_PCLK_DIV_2    0x80 /* PCLK freq divided by 2 */
 246 #define   REG32_PCLK_DIV_4    0xC0 /* PCLK freq divided by 4 */
 247 #define ARCOM2      0x34 /* Zoom: Horizontal start point */
 248 #define REG45       0x45 /* Register 45 */
 249 #define FLL         0x46 /* Frame Length Adjustment LSBs */
 250 #define FLH         0x47 /* Frame Length Adjustment MSBs */
 251 #define COM19       0x48 /* Zoom: Vertical start point */
 252 #define ZOOMS       0x49 /* Zoom: Vertical start point */
 253 #define COM22       0x4B /* Flash light control */
 254 #define COM25       0x4E /* For Banding operations */
 255 #define   COM25_50HZ_BANDING_AEC_MSBS_MASK      0xC0 /* 50Hz Bd. AEC 2 MSBs */
 256 #define   COM25_60HZ_BANDING_AEC_MSBS_MASK      0x30 /* 60Hz Bd. AEC 2 MSBs */
 257 #define   COM25_50HZ_BANDING_AEC_MSBS_SET(x)    VAL_SET(x, 0x3, 8, 6)
 258 #define   COM25_60HZ_BANDING_AEC_MSBS_SET(x)    VAL_SET(x, 0x3, 8, 4)
 259 #define BD50        0x4F /* 50Hz Banding AEC 8 LSBs */
 260 #define   BD50_50HZ_BANDING_AEC_LSBS_SET(x)     VAL_SET(x, 0xFF, 0, 0)
 261 #define BD60        0x50 /* 60Hz Banding AEC 8 LSBs */
 262 #define   BD60_60HZ_BANDING_AEC_LSBS_SET(x)     VAL_SET(x, 0xFF, 0, 0)
 263 #define REG5A       0x5A /* 50/60Hz Banding Maximum AEC Step */
 264 #define   BD50_MAX_AEC_STEP_MASK         0xF0 /* 50Hz Banding Max. AEC Step */
 265 #define   BD60_MAX_AEC_STEP_MASK         0x0F /* 60Hz Banding Max. AEC Step */
 266 #define   BD50_MAX_AEC_STEP_SET(x)       VAL_SET((x - 1), 0x0F, 0, 4)
 267 #define   BD60_MAX_AEC_STEP_SET(x)       VAL_SET((x - 1), 0x0F, 0, 0)
 268 #define REG5D       0x5D /* AVGsel[7:0],   16-zone average weight option */
 269 #define REG5E       0x5E /* AVGsel[15:8],  16-zone average weight option */
 270 #define REG5F       0x5F /* AVGsel[23:16], 16-zone average weight option */
 271 #define REG60       0x60 /* AVGsel[31:24], 16-zone average weight option */
 272 #define HISTO_LOW   0x61 /* Histogram Algorithm Low Level */
 273 #define HISTO_HIGH  0x62 /* Histogram Algorithm High Level */
 274
 275 /*
 276  * ID
 277  */
 278 #define MANUFACTURER_ID 0x7FA2
 279 #define PID_OV2640      0x2642
 280 #define VERSION(pid, ver) ((pid << 8) | (ver & 0xFF))
 281
 282 /*
 283  * Struct
 284  */
 285 struct regval_list {
 286         u8 reg_num;
 287         u8 value;
 288 };
 289
 290 struct ov2640_win_size {
 291         char                            *name;
 292         u32                             width;
 293         u32                             height;
 294         const struct regval_list        *regs;
 295 };
 296
 297
 298 struct ov2640_priv {
 299         struct v4l2_subdev              subdev;
 300 #if defined(CONFIG_MEDIA_CONTROLLER)
 301         struct media_pad pad;
 302 #endif
 303         struct v4l2_ctrl_handler        hdl;
 304         u32     cfmt_code;
 305         struct clk                      *clk;
 306         const struct ov2640_win_size    *win;
 307
 308         struct gpio_desc *resetb_gpio;
 309         struct gpio_desc *pwdn_gpio;
 310
 311         struct mutex lock; /* lock to protect streaming and power_count */
 312         bool streaming;
 313         int power_count;
 314 };
 315
 316 /*
 317  * Registers settings
 318  */
 319
 320 #define ENDMARKER { 0xff, 0xff }
 321
 322 static const struct regval_list ov2640_init_regs[] = {
 323         { BANK_SEL, BANK_SEL_DSP },
 324         { 0x2c,   0xff },
 325         { 0x2e,   0xdf },
 326         { BANK_SEL, BANK_SEL_SENS },
 327         { 0x3c,   0x32 },
 328         { CLKRC,  CLKRC_DIV_SET(1) },
 329         { COM2,   COM2_OCAP_Nx_SET(3) },
 330         { REG04,  REG04_DEF | REG04_HREF_EN },
 331         { COM8,   COM8_DEF | COM8_BNDF_EN | COM8_AGC_EN | COM8_AEC_EN },
 332         { COM9,   COM9_AGC_GAIN_8x | 0x08},
 333         { 0x2c,   0x0c },
 334         { 0x33,   0x78 },
 335         { 0x3a,   0x33 },
 336         { 0x3b,   0xfb },
 337         { 0x3e,   0x00 },
 338         { 0x43,   0x11 },
 339         { 0x16,   0x10 },
 340         { 0x39,   0x02 },
 341         { 0x35,   0x88 },
 342         { 0x22,   0x0a },
 343         { 0x37,   0x40 },
 344         { 0x23,   0x00 },
 345         { ARCOM2, 0xa0 },
 346         { 0x06,   0x02 },
 347         { 0x06,   0x88 },
 348         { 0x07,   0xc0 },
 349         { 0x0d,   0xb7 },
 350         { 0x0e,   0x01 },
 351         { 0x4c,   0x00 },
 352         { 0x4a,   0x81 },
 353         { 0x21,   0x99 },
 354         { AEW,    0x40 },
 355         { AEB,    0x38 },
 356         { VV,     VV_HIGH_TH_SET(0x08) | VV_LOW_TH_SET(0x02) },
 357         { 0x5c,   0x00 },
 358         { 0x63,   0x00 },
 359         { FLL,    0x22 },
 360         { COM3,   0x38 | COM3_BAND_AUTO },
 361         { REG5D,  0x55 },
 362         { REG5E,  0x7d },
 363         { REG5F,  0x7d },
 364         { REG60,  0x55 },
 365         { HISTO_LOW,   0x70 },
 366         { HISTO_HIGH,  0x80 },
 367         { 0x7c,   0x05 },
 368         { 0x20,   0x80 },
 369         { 0x28,   0x30 },
 370         { 0x6c,   0x00 },
 371         { 0x6d,   0x80 },
 372         { 0x6e,   0x00 },
 373         { 0x70,   0x02 },
 374         { 0x71,   0x94 },
 375         { 0x73,   0xc1 },
 376         { 0x3d,   0x34 },
 377         { COM7,   COM7_RES_UXGA | COM7_ZOOM_EN },
 378         { REG5A,  BD50_MAX_AEC_STEP_SET(6)
 379                    | BD60_MAX_AEC_STEP_SET(8) },                /* 0x57 */
 380         { COM25,  COM25_50HZ_BANDING_AEC_MSBS_SET(0x0bb)
 381                    | COM25_60HZ_BANDING_AEC_MSBS_SET(0x09c) },  /* 0x00 */
 382         { BD50,   BD50_50HZ_BANDING_AEC_LSBS_SET(0x0bb) },      /* 0xbb */
 383         { BD60,   BD60_60HZ_BANDING_AEC_LSBS_SET(0x09c) },      /* 0x9c */
 384         { BANK_SEL,  BANK_SEL_DSP },
 385         { 0xe5,   0x7f },
 386         { MC_BIST,  MC_BIST_RESET | MC_BIST_BOOT_ROM_SEL },
 387         { 0x41,   0x24 },
 388         { RESET,  RESET_JPEG | RESET_DVP },
 389         { 0x76,   0xff },
 390         { 0x33,   0xa0 },
 391         { 0x42,   0x20 },
 392         { 0x43,   0x18 },
 393         { 0x4c,   0x00 },
 394         { CTRL3,  CTRL3_BPC_EN | CTRL3_WPC_EN | 0x10 },
 395         { 0x88,   0x3f },
 396         { 0xd7,   0x03 },
 397         { 0xd9,   0x10 },
 398         { R_DVP_SP,  R_DVP_SP_AUTO_MODE | 0x2 },
 399         { 0xc8,   0x08 },
 400         { 0xc9,   0x80 },
 401         { BPADDR, 0x00 },
 402         { BPDATA, 0x00 },
 403         { BPADDR, 0x03 },
 404         { BPDATA, 0x48 },
 405         { BPDATA, 0x48 },
 406         { BPADDR, 0x08 },
 407         { BPDATA, 0x20 },
 408         { BPDATA, 0x10 },
 409         { BPDATA, 0x0e },
 410         { 0x90,   0x00 },
 411         { 0x91,   0x0e },
 412         { 0x91,   0x1a },
 413         { 0x91,   0x31 },
 414         { 0x91,   0x5a },
 415         { 0x91,   0x69 },
 416         { 0x91,   0x75 },
 417         { 0x91,   0x7e },
 418         { 0x91,   0x88 },
 419         { 0x91,   0x8f },
 420         { 0x91,   0x96 },
 421         { 0x91,   0xa3 },
 422         { 0x91,   0xaf },
 423         { 0x91,   0xc4 },
 424         { 0x91,   0xd7 },
 425         { 0x91,   0xe8 },
 426         { 0x91,   0x20 },
 427         { 0x92,   0x00 },
 428         { 0x93,   0x06 },
 429         { 0x93,   0xe3 },
 430         { 0x93,   0x03 },
 431         { 0x93,   0x03 },
 432         { 0x93,   0x00 },
 433         { 0x93,   0x02 },
 434         { 0x93,   0x00 },
 435         { 0x93,   0x00 },
 436         { 0x93,   0x00 },
 437         { 0x93,   0x00 },
 438         { 0x93,   0x00 },
 439         { 0x93,   0x00 },
 440         { 0x93,   0x00 },
 441         { 0x96,   0x00 },
 442         { 0x97,   0x08 },
 443         { 0x97,   0x19 },
 444         { 0x97,   0x02 },
 445         { 0x97,   0x0c },
 446         { 0x97,   0x24 },
 447         { 0x97,   0x30 },
 448         { 0x97,   0x28 },
 449         { 0x97,   0x26 },
 450         { 0x97,   0x02 },
 451         { 0x97,   0x98 },
 452         { 0x97,   0x80 },
 453         { 0x97,   0x00 },
 454         { 0x97,   0x00 },
 455         { 0xa4,   0x00 },
 456         { 0xa8,   0x00 },
 457         { 0xc5,   0x11 },
 458         { 0xc6,   0x51 },
 459         { 0xbf,   0x80 },
 460         { 0xc7,   0x10 },       /* simple AWB */
 461         { 0xb6,   0x66 },
 462         { 0xb8,   0xA5 },
 463         { 0xb7,   0x64 },
 464         { 0xb9,   0x7C },
 465         { 0xb3,   0xaf },
 466         { 0xb4,   0x97 },
 467         { 0xb5,   0xFF },
 468         { 0xb0,   0xC5 },
 469         { 0xb1,   0x94 },
 470         { 0xb2,   0x0f },
 471         { 0xc4,   0x5c },
 472         { 0xa6,   0x00 },
 473         { 0xa7,   0x20 },
 474         { 0xa7,   0xd8 },
 475         { 0xa7,   0x1b },
 476         { 0xa7,   0x31 },
 477         { 0xa7,   0x00 },
 478         { 0xa7,   0x18 },
 479         { 0xa7,   0x20 },
 480         { 0xa7,   0xd8 },
 481         { 0xa7,   0x19 },
 482         { 0xa7,   0x31 },
 483         { 0xa7,   0x00 },
 484         { 0xa7,   0x18 },
 485         { 0xa7,   0x20 },
 486         { 0xa7,   0xd8 },
 487         { 0xa7,   0x19 },
 488         { 0xa7,   0x31 },
 489         { 0xa7,   0x00 },
 490         { 0xa7,   0x18 },
 491         { 0x7f,   0x00 },
 492         { 0xe5,   0x1f },
 493         { 0xe1,   0x77 },
 494         { 0xdd,   0x7f },
 495         { CTRL0,  CTRL0_YUV422 | CTRL0_YUV_EN | CTRL0_RGB_EN },
 496         ENDMARKER,
 497 };
 498
 499 /*
 500  * Register settings for window size
 501  * The preamble, setup the internal DSP to input an UXGA (1600x1200) image.
 502  * Then the different zooming configurations will setup the output image size.
 503  */
 504 static const struct regval_list ov2640_size_change_preamble_regs[] = {
 505         { BANK_SEL, BANK_SEL_DSP },
 506         { RESET, RESET_DVP },
 507         { SIZEL, SIZEL_HSIZE8_11_SET(UXGA_WIDTH) |
 508                  SIZEL_HSIZE8_SET(UXGA_WIDTH) |
 509                  SIZEL_VSIZE8_SET(UXGA_HEIGHT) },
 510         { HSIZE8, HSIZE8_SET(UXGA_WIDTH) },
 511         { VSIZE8, VSIZE8_SET(UXGA_HEIGHT) },
 512         { CTRL2, CTRL2_DCW_EN | CTRL2_SDE_EN |
 513                  CTRL2_UV_AVG_EN | CTRL2_CMX_EN | CTRL2_UV_ADJ_EN },
 514         { HSIZE, HSIZE_SET(UXGA_WIDTH) },
 515         { VSIZE, VSIZE_SET(UXGA_HEIGHT) },
 516         { XOFFL, XOFFL_SET(0) },
 517         { YOFFL, YOFFL_SET(0) },
 518         { VHYX, VHYX_HSIZE_SET(UXGA_WIDTH) | VHYX_VSIZE_SET(UXGA_HEIGHT) |
 519                 VHYX_XOFF_SET(0) | VHYX_YOFF_SET(0)},
 520         { TEST, TEST_HSIZE_SET(UXGA_WIDTH) },
 521         ENDMARKER,
 522 };
 523
 524 #define PER_SIZE_REG_SEQ(x, y, v_div, h_div, pclk_div)  \
 525         { CTRLI, CTRLI_LP_DP | CTRLI_V_DIV_SET(v_div) | \
 526                  CTRLI_H_DIV_SET(h_div)},               \
 527         { ZMOW, ZMOW_OUTW_SET(x) },                     \
 528         { ZMOH, ZMOH_OUTH_SET(y) },                     \
 529         { ZMHH, ZMHH_OUTW_SET(x) | ZMHH_OUTH_SET(y) },  \
 530         { R_DVP_SP, pclk_div },                         \
 531         { RESET, 0x00}
 532
 533 static const struct regval_list ov2640_qcif_regs[] = {
 534         PER_SIZE_REG_SEQ(QCIF_WIDTH, QCIF_HEIGHT, 3, 3, 4),
 535         ENDMARKER,
 536 };
 537
 538 static const struct regval_list ov2640_qvga_regs[] = {
 539         PER_SIZE_REG_SEQ(QVGA_WIDTH, QVGA_HEIGHT, 2, 2, 4),
 540         ENDMARKER,
 541 };
 542
 543 static const struct regval_list ov2640_cif_regs[] = {
 544         PER_SIZE_REG_SEQ(CIF_WIDTH, CIF_HEIGHT, 2, 2, 8),
 545         ENDMARKER,
 546 };
 547
 548 static const struct regval_list ov2640_vga_regs[] = {
 549         PER_SIZE_REG_SEQ(VGA_WIDTH, VGA_HEIGHT, 0, 0, 2),
 550         ENDMARKER,
 551 };
 552
 553 static const struct regval_list ov2640_svga_regs[] = {
 554         PER_SIZE_REG_SEQ(SVGA_WIDTH, SVGA_HEIGHT, 1, 1, 2),
 555         ENDMARKER,
 556 };
 557
 558 static const struct regval_list ov2640_xga_regs[] = {
 559         PER_SIZE_REG_SEQ(XGA_WIDTH, XGA_HEIGHT, 0, 0, 2),
 560         { CTRLI,    0x00},
 561         ENDMARKER,
 562 };
 563
 564 static const struct regval_list ov2640_sxga_regs[] = {
 565         PER_SIZE_REG_SEQ(SXGA_WIDTH, SXGA_HEIGHT, 0, 0, 2),
 566         { CTRLI,    0x00},
 567         { R_DVP_SP, 2 | R_DVP_SP_AUTO_MODE },
 568         ENDMARKER,
 569 };
 570
 571 static const struct regval_list ov2640_uxga_regs[] = {
 572         PER_SIZE_REG_SEQ(UXGA_WIDTH, UXGA_HEIGHT, 0, 0, 0),
 573         { CTRLI,    0x00},
 574         { R_DVP_SP, 0 | R_DVP_SP_AUTO_MODE },
 575         ENDMARKER,
 576 };
 577
 578 #define OV2640_SIZE(n, w, h, r) \
 579         {.name = n, .width = w , .height = h, .regs = r }
 580
 581 static const struct ov2640_win_size ov2640_supported_win_sizes[] = {
 582         OV2640_SIZE("QCIF", QCIF_WIDTH, QCIF_HEIGHT, ov2640_qcif_regs),
 583         OV2640_SIZE("QVGA", QVGA_WIDTH, QVGA_HEIGHT, ov2640_qvga_regs),
 584         OV2640_SIZE("CIF", CIF_WIDTH, CIF_HEIGHT, ov2640_cif_regs),
 585         OV2640_SIZE("VGA", VGA_WIDTH, VGA_HEIGHT, ov2640_vga_regs),
 586         OV2640_SIZE("SVGA", SVGA_WIDTH, SVGA_HEIGHT, ov2640_svga_regs),
 587         OV2640_SIZE("XGA", XGA_WIDTH, XGA_HEIGHT, ov2640_xga_regs),
 588         OV2640_SIZE("SXGA", SXGA_WIDTH, SXGA_HEIGHT, ov2640_sxga_regs),
 589         OV2640_SIZE("UXGA", UXGA_WIDTH, UXGA_HEIGHT, ov2640_uxga_regs),
 590 };
 591
 592 /*
 593  * Register settings for pixel formats
 594  */
 595 static const struct regval_list ov2640_format_change_preamble_regs[] = {
 596         { BANK_SEL, BANK_SEL_DSP },
 597         { R_BYPASS, R_BYPASS_USE_DSP },
 598         ENDMARKER,
 599 };
 600
 601 static const struct regval_list ov2640_yuyv_regs[] = {
 602         { IMAGE_MODE, IMAGE_MODE_YUV422 },
 603         { 0xd7, 0x03 },
 604         { 0x33, 0xa0 },
 605         { 0xe5, 0x1f },
 606         { 0xe1, 0x67 },
 607         { RESET,  0x00 },
 608         { R_BYPASS, R_BYPASS_USE_DSP },
 609         ENDMARKER,
 610 };
 611
 612 static const struct regval_list ov2640_uyvy_regs[] = {
 613         { IMAGE_MODE, IMAGE_MODE_LBYTE_FIRST | IMAGE_MODE_YUV422 },
 614         { 0xd7, 0x01 },
 615         { 0x33, 0xa0 },
 616         { 0xe1, 0x67 },
 617         { RESET,  0x00 },
 618         { R_BYPASS, R_BYPASS_USE_DSP },
 619         ENDMARKER,
 620 };
 621
 622 static const struct regval_list ov2640_rgb565_be_regs[] = {
 623         { IMAGE_MODE, IMAGE_MODE_RGB565 },
 624         { 0xd7, 0x03 },
 625         { RESET,  0x00 },
 626         { R_BYPASS, R_BYPASS_USE_DSP },
 627         ENDMARKER,
 628 };
 629
 630 static const struct regval_list ov2640_rgb565_le_regs[] = {
 631         { IMAGE_MODE, IMAGE_MODE_LBYTE_FIRST | IMAGE_MODE_RGB565 },
 632         { 0xd7, 0x03 },
 633         { RESET,  0x00 },
 634         { R_BYPASS, R_BYPASS_USE_DSP },
 635         ENDMARKER,
 636 };
 637
 638 static u32 ov2640_codes[] = {
 639         MEDIA_BUS_FMT_YUYV8_2X8,
 640         MEDIA_BUS_FMT_UYVY8_2X8,
 641         MEDIA_BUS_FMT_YVYU8_2X8,
 642         MEDIA_BUS_FMT_VYUY8_2X8,
 643         MEDIA_BUS_FMT_RGB565_2X8_BE,
 644         MEDIA_BUS_FMT_RGB565_2X8_LE,
 645 };
 646
 647 /*
 648  * General functions
 649  */
 650 static struct ov2640_priv *to_ov2640(const struct i2c_client *client)
 651 {
 652         return container_of(i2c_get_clientdata(client), struct ov2640_priv,
 653                             subdev);
 654 }
 655
 656 static int ov2640_write_array(struct i2c_client *client,
 657                               const struct regval_list *vals)
 658 {
 659         int ret;
 660
 661         while ((vals->reg_num != 0xff) || (vals->value != 0xff)) {
 662                 ret = i2c_smbus_write_byte_data(client,
 663                                                 vals->reg_num, vals->value);
 664                 dev_vdbg(&client->dev, "array: 0x%02x, 0x%02x",
 665                          vals->reg_num, vals->value);
 666
 667                 if (ret < 0)
 668                         return ret;
 669                 vals++;
 670         }
 671         return 0;
 672 }
 673
 674 static int ov2640_mask_set(struct i2c_client *client,
 675                            u8  reg, u8  mask, u8  set)
 676 {
 677         s32 val = i2c_smbus_read_byte_data(client, reg);
 678         if (val < 0)
 679                 return val;
 680
 681         val &= ~mask;
 682         val |= set & mask;
 683
 684         dev_vdbg(&client->dev, "masks: 0x%02x, 0x%02x", reg, val);
 685
 686         return i2c_smbus_write_byte_data(client, reg, val);
 687 }
 688
 689 static int ov2640_reset(struct i2c_client *client)
 690 {
 691         int ret;
 692         static const struct regval_list reset_seq[] = {
 693                 {BANK_SEL, BANK_SEL_SENS},
 694                 {COM7, COM7_SRST},
 695                 ENDMARKER,
 696         };
 697
 698         ret = ov2640_write_array(client, reset_seq);
 699         if (ret)
 700                 goto err;
 701
 702         msleep(5);
 703 err:
 704         dev_dbg(&client->dev, "%s: (ret %d)", __func__, ret);
 705         return ret;
 706 }
 707
 708 /*
 709  * functions
 710  */
 711 static int ov2640_s_ctrl(struct v4l2_ctrl *ctrl)
 712 {
 713         struct v4l2_subdev *sd =
 714                 &container_of(ctrl->handler, struct ov2640_priv, hdl)->subdev;
 715         struct i2c_client  *client = v4l2_get_subdevdata(sd);
 716         struct ov2640_priv *priv = to_ov2640(client);
 717         u8 val;
 718         int ret;
 719
 720         /* v4l2_ctrl_lock() locks our own mutex */
 721
 722         /*
 723          * If the device is not powered up by the host driver, do not apply any
 724          * controls to H/W at this time. Instead the controls will be restored
 725          * when the streaming is started.
 726          */
 727         if (!priv->power_count)
 728                 return 0;
 729
 730         ret = i2c_smbus_write_byte_data(client, BANK_SEL, BANK_SEL_SENS);
 731         if (ret < 0)
 732                 return ret;
 733
 734         switch (ctrl->id) {
 735         case V4L2_CID_VFLIP:
 736                 val = ctrl->val ? REG04_VFLIP_IMG | REG04_VREF_EN : 0x00;
 737                 return ov2640_mask_set(client, REG04,
 738                                        REG04_VFLIP_IMG | REG04_VREF_EN, val);
 739                 /* NOTE: REG04_VREF_EN: 1 line shift / even/odd line swap */
 740         case V4L2_CID_HFLIP:
 741                 val = ctrl->val ? REG04_HFLIP_IMG : 0x00;
 742                 return ov2640_mask_set(client, REG04, REG04_HFLIP_IMG, val);
 743         }
 744
 745         return -EINVAL;
 746 }
 747
 748 #ifdef CONFIG_VIDEO_ADV_DEBUG
 749 static int ov2640_g_register(struct v4l2_subdev *sd,
 750                              struct v4l2_dbg_register *reg)
 751 {
 752         struct i2c_client *client = v4l2_get_subdevdata(sd);
 753         int ret;
 754
 755         reg->size = 1;
 756         if (reg->reg > 0xff)
 757                 return -EINVAL;
 758
 759         ret = i2c_smbus_read_byte_data(client, reg->reg);
 760         if (ret < 0)
 761                 return ret;
 762
 763         reg->val = ret;
 764
 765         return 0;
 766 }
 767
 768 static int ov2640_s_register(struct v4l2_subdev *sd,
 769                              const struct v4l2_dbg_register *reg)
 770 {
 771         struct i2c_client *client = v4l2_get_subdevdata(sd);
 772
 773         if (reg->reg > 0xff ||
 774             reg->val > 0xff)
 775                 return -EINVAL;
 776
 777         return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
 778 }
 779 #endif
 780
 781 static void ov2640_set_power(struct ov2640_priv *priv, int on)
 782 {
 783 #ifdef CONFIG_GPIOLIB
 784         if (priv->pwdn_gpio)
 785                 gpiod_direction_output(priv->pwdn_gpio, !on);
 786         if (on && priv->resetb_gpio) {
 787                 /* Active the resetb pin to perform a reset pulse */
 788                 gpiod_direction_output(priv->resetb_gpio, 1);
 789                 usleep_range(3000, 5000);
 790                 gpiod_set_value(priv->resetb_gpio, 0);
 791         }
 792 #endif
 793 }
 794
 795 static int ov2640_s_power(struct v4l2_subdev *sd, int on)
 796 {
 797         struct i2c_client *client = v4l2_get_subdevdata(sd);
 798         struct ov2640_priv *priv = to_ov2640(client);
 799
 800         mutex_lock(&priv->lock);
 801
 802         /*
 803          * If the power count is modified from 0 to != 0 or from != 0 to 0,
 804          * update the power state.
 805          */
 806         if (priv->power_count == !on)
 807                 ov2640_set_power(priv, on);
 808         priv->power_count += on ? 1 : -1;
 809         WARN_ON(priv->power_count < 0);
 810         mutex_unlock(&priv->lock);
 811
 812         return 0;
 813 }
 814
 815 /* Select the nearest higher resolution for capture */
 816 static const struct ov2640_win_size *ov2640_select_win(u32 width, u32 height)
 817 {
 818         int i, default_size = ARRAY_SIZE(ov2640_supported_win_sizes) - 1;
 819
 820         for (i = 0; i < ARRAY_SIZE(ov2640_supported_win_sizes); i++) {
 821                 if (ov2640_supported_win_sizes[i].width  >= width &&
 822                     ov2640_supported_win_sizes[i].height >= height)
 823                         return &ov2640_supported_win_sizes[i];
 824         }
 825
 826         return &ov2640_supported_win_sizes[default_size];
 827 }
 828
 829 static int ov2640_set_params(struct i2c_client *client,
 830                              const struct ov2640_win_size *win, u32 code)
 831 {
 832         const struct regval_list *selected_cfmt_regs;
 833         u8 val;
 834         int ret;
 835
 836         if (!win)
 837                 return -EINVAL;
 838
 839         switch (code) {
 840         case MEDIA_BUS_FMT_RGB565_2X8_BE:
 841                 dev_dbg(&client->dev, "%s: Selected cfmt RGB565 BE", __func__);
 842                 selected_cfmt_regs = ov2640_rgb565_be_regs;
 843                 break;
 844         case MEDIA_BUS_FMT_RGB565_2X8_LE:
 845                 dev_dbg(&client->dev, "%s: Selected cfmt RGB565 LE", __func__);
 846                 selected_cfmt_regs = ov2640_rgb565_le_regs;
 847                 break;
 848         case MEDIA_BUS_FMT_YUYV8_2X8:
 849                 dev_dbg(&client->dev, "%s: Selected cfmt YUYV (YUV422)", __func__);
 850                 selected_cfmt_regs = ov2640_yuyv_regs;
 851                 break;
 852         case MEDIA_BUS_FMT_UYVY8_2X8:
 853         default:
 854                 dev_dbg(&client->dev, "%s: Selected cfmt UYVY", __func__);
 855                 selected_cfmt_regs = ov2640_uyvy_regs;
 856                 break;
 857         case MEDIA_BUS_FMT_YVYU8_2X8:
 858                 dev_dbg(&client->dev, "%s: Selected cfmt YVYU", __func__);
 859                 selected_cfmt_regs = ov2640_yuyv_regs;
 860                 break;
 861         case MEDIA_BUS_FMT_VYUY8_2X8:
 862                 dev_dbg(&client->dev, "%s: Selected cfmt VYUY", __func__);
 863                 selected_cfmt_regs = ov2640_uyvy_regs;
 864                 break;
 865         }
 866
 867         /* reset hardware */
 868         ov2640_reset(client);
 869
 870         /* initialize the sensor with default data */
 871         dev_dbg(&client->dev, "%s: Init default", __func__);
 872         ret = ov2640_write_array(client, ov2640_init_regs);
 873         if (ret < 0)
 874                 goto err;
 875
 876         /* select preamble */
 877         dev_dbg(&client->dev, "%s: Set size to %s", __func__, win->name);
 878         ret = ov2640_write_array(client, ov2640_size_change_preamble_regs);
 879         if (ret < 0)
 880                 goto err;
 881
 882         /* set size win */
 883         ret = ov2640_write_array(client, win->regs);
 884         if (ret < 0)
 885                 goto err;
 886
 887         /* cfmt preamble */
 888         dev_dbg(&client->dev, "%s: Set cfmt", __func__);
 889         ret = ov2640_write_array(client, ov2640_format_change_preamble_regs);
 890         if (ret < 0)
 891                 goto err;
 892
 893         /* set cfmt */
 894         ret = ov2640_write_array(client, selected_cfmt_regs);
 895         if (ret < 0)
 896                 goto err;
 897         val = (code == MEDIA_BUS_FMT_YVYU8_2X8)
 898               || (code == MEDIA_BUS_FMT_VYUY8_2X8) ? CTRL0_VFIRST : 0x00;
 899         ret = ov2640_mask_set(client, CTRL0, CTRL0_VFIRST, val);
 900         if (ret < 0)
 901                 goto err;
 902
 903         return 0;
 904
 905 err:
 906         dev_err(&client->dev, "%s: Error %d", __func__, ret);
 907         ov2640_reset(client);
 908
 909         return ret;
 910 }
 911
 912 static int ov2640_get_fmt(struct v4l2_subdev *sd,
 913                 struct v4l2_subdev_pad_config *cfg,
 914                 struct v4l2_subdev_format *format)
 915 {
 916         struct v4l2_mbus_framefmt *mf = &format->format;
 917         struct i2c_client  *client = v4l2_get_subdevdata(sd);
 918         struct ov2640_priv *priv = to_ov2640(client);
 919
 920         if (format->pad)
 921                 return -EINVAL;
 922
 923         if (!priv->win) {
 924                 priv->win = ov2640_select_win(SVGA_WIDTH, SVGA_HEIGHT);
 925                 priv->cfmt_code = MEDIA_BUS_FMT_UYVY8_2X8;
 926         }
 927
 928         mf->width       = priv->win->width;
 929         mf->height      = priv->win->height;
 930         mf->code        = priv->cfmt_code;
 931         mf->colorspace  = V4L2_COLORSPACE_SRGB;
 932         mf->field       = V4L2_FIELD_NONE;
 933
 934         return 0;
 935 }
 936
 937 static int ov2640_set_fmt(struct v4l2_subdev *sd,
 938                 struct v4l2_subdev_pad_config *cfg,
 939                 struct v4l2_subdev_format *format)
 940 {
 941         struct v4l2_mbus_framefmt *mf = &format->format;
 942         struct i2c_client *client = v4l2_get_subdevdata(sd);
 943         struct ov2640_priv *priv = to_ov2640(client);
 944         const struct ov2640_win_size *win;
 945         int ret = 0;
 946
 947         if (format->pad)
 948                 return -EINVAL;
 949
 950         mutex_lock(&priv->lock);
 951
 952         /* select suitable win */
 953         win = ov2640_select_win(mf->width, mf->height);
 954         mf->width       = win->width;
 955         mf->height      = win->height;
 956
 957         mf->field       = V4L2_FIELD_NONE;
 958         mf->colorspace  = V4L2_COLORSPACE_SRGB;
 959
 960         switch (mf->code) {
 961         case MEDIA_BUS_FMT_RGB565_2X8_BE:
 962         case MEDIA_BUS_FMT_RGB565_2X8_LE:
 963         case MEDIA_BUS_FMT_YUYV8_2X8:
 964         case MEDIA_BUS_FMT_UYVY8_2X8:
 965         case MEDIA_BUS_FMT_YVYU8_2X8:
 966         case MEDIA_BUS_FMT_VYUY8_2X8:
 967                 break;
 968         default:
 969                 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
 970                 break;
 971         }
 972
 973         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
 974                 struct ov2640_priv *priv = to_ov2640(client);
 975
 976                 if (priv->streaming) {
 977                         ret = -EBUSY;
 978                         goto out;
 979                 }
 980                 /* select win */
 981                 priv->win = win;
 982                 /* select format */
 983                 priv->cfmt_code = mf->code;
 984         } else {
 985                 cfg->try_fmt = *mf;
 986         }
 987 out:
 988         mutex_unlock(&priv->lock);
 989
 990         return ret;
 991 }
 992
 993 static int ov2640_enum_mbus_code(struct v4l2_subdev *sd,
 994                 struct v4l2_subdev_pad_config *cfg,
 995                 struct v4l2_subdev_mbus_code_enum *code)
 996 {
 997         if (code->pad || code->index >= ARRAY_SIZE(ov2640_codes))
 998                 return -EINVAL;
 999
1000         code->code = ov2640_codes[code->index];
1001         return 0;
1002 }
1003
1004 static int ov2640_get_selection(struct v4l2_subdev *sd,
1005                 struct v4l2_subdev_pad_config *cfg,
1006                 struct v4l2_subdev_selection *sel)
1007 {
1008         if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
1009                 return -EINVAL;
1010
1011         switch (sel->target) {
1012         case V4L2_SEL_TGT_CROP_BOUNDS:
1013         case V4L2_SEL_TGT_CROP_DEFAULT:
1014         case V4L2_SEL_TGT_CROP:
1015                 sel->r.left = 0;
1016                 sel->r.top = 0;
1017                 sel->r.width = UXGA_WIDTH;
1018                 sel->r.height = UXGA_HEIGHT;
1019                 return 0;
1020         default:
1021                 return -EINVAL;
1022         }
1023 }
1024
1025 static int ov2640_s_stream(struct v4l2_subdev *sd, int on)
1026 {
1027         struct i2c_client *client = v4l2_get_subdevdata(sd);
1028         struct ov2640_priv *priv = to_ov2640(client);
1029         int ret = 0;
1030
1031         mutex_lock(&priv->lock);
1032         if (priv->streaming == !on) {
1033                 if (on) {
1034                         ret = ov2640_set_params(client, priv->win,
1035                                                 priv->cfmt_code);
1036                         if (!ret)
1037                                 ret = __v4l2_ctrl_handler_setup(&priv->hdl);
1038                 }
1039         }
1040         if (!ret)
1041                 priv->streaming = on;
1042         mutex_unlock(&priv->lock);
1043
1044         return ret;
1045 }
1046
1047 static int ov2640_video_probe(struct i2c_client *client)
1048 {
1049         struct ov2640_priv *priv = to_ov2640(client);
1050         u8 pid, ver, midh, midl;
1051         const char *devname;
1052         int ret;
1053
1054         ret = ov2640_s_power(&priv->subdev, 1);
1055         if (ret < 0)
1056                 return ret;
1057
1058         /*
1059          * check and show product ID and manufacturer ID
1060          */
1061         i2c_smbus_write_byte_data(client, BANK_SEL, BANK_SEL_SENS);
1062         pid  = i2c_smbus_read_byte_data(client, PID);
1063         ver  = i2c_smbus_read_byte_data(client, VER);
1064         midh = i2c_smbus_read_byte_data(client, MIDH);
1065         midl = i2c_smbus_read_byte_data(client, MIDL);
1066
1067         switch (VERSION(pid, ver)) {
1068         case PID_OV2640:
1069                 devname     = "ov2640";
1070                 break;
1071         default:
1072                 dev_err(&client->dev,
1073                         "Product ID error %x:%x\n", pid, ver);
1074                 ret = -ENODEV;
1075                 goto done;
1076         }
1077
1078         dev_info(&client->dev,
1079                  "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
1080                  devname, pid, ver, midh, midl);
1081
1082 done:
1083         ov2640_s_power(&priv->subdev, 0);
1084         return ret;
1085 }
1086
1087 static const struct v4l2_ctrl_ops ov2640_ctrl_ops = {
1088         .s_ctrl = ov2640_s_ctrl,
1089 };
1090
1091 static const struct v4l2_subdev_core_ops ov2640_subdev_core_ops = {
1092 #ifdef CONFIG_VIDEO_ADV_DEBUG
1093         .g_register     = ov2640_g_register,
1094         .s_register     = ov2640_s_register,
1095 #endif
1096         .s_power        = ov2640_s_power,
1097 };
1098
1099 static const struct v4l2_subdev_pad_ops ov2640_subdev_pad_ops = {
1100         .enum_mbus_code = ov2640_enum_mbus_code,
1101         .get_selection  = ov2640_get_selection,
1102         .get_fmt        = ov2640_get_fmt,
1103         .set_fmt        = ov2640_set_fmt,
1104 };
1105
1106 static const struct v4l2_subdev_video_ops ov2640_subdev_video_ops = {
1107         .s_stream = ov2640_s_stream,
1108 };
1109
1110 static const struct v4l2_subdev_ops ov2640_subdev_ops = {
1111         .core   = &ov2640_subdev_core_ops,
1112         .pad    = &ov2640_subdev_pad_ops,
1113         .video  = &ov2640_subdev_video_ops,
1114 };
1115
1116 static int ov2640_probe_dt(struct i2c_client *client,
1117                 struct ov2640_priv *priv)
1118 {
1119         int ret;
1120
1121         /* Request the reset GPIO deasserted */
1122         priv->resetb_gpio = devm_gpiod_get_optional(&client->dev, "resetb",
1123                         GPIOD_OUT_LOW);
1124
1125         if (!priv->resetb_gpio)
1126                 dev_dbg(&client->dev, "resetb gpio is not assigned!\n");
1127
1128         ret = PTR_ERR_OR_ZERO(priv->resetb_gpio);
1129         if (ret && ret != -ENOSYS) {
1130                 dev_dbg(&client->dev,
1131                         "Error %d while getting resetb gpio\n", ret);
1132                 return ret;
1133         }
1134
1135         /* Request the power down GPIO asserted */
1136         priv->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "pwdn",
1137                         GPIOD_OUT_HIGH);
1138
1139         if (!priv->pwdn_gpio)
1140                 dev_dbg(&client->dev, "pwdn gpio is not assigned!\n");
1141
1142         ret = PTR_ERR_OR_ZERO(priv->pwdn_gpio);
1143         if (ret && ret != -ENOSYS) {
1144                 dev_dbg(&client->dev,
1145                         "Error %d while getting pwdn gpio\n", ret);
1146                 return ret;
1147         }
1148
1149         return 0;
1150 }
1151
1152 /*
1153  * i2c_driver functions
1154  */
1155 static int ov2640_probe(struct i2c_client *client,
1156                         const struct i2c_device_id *did)
1157 {
1158         struct ov2640_priv      *priv;
1159         struct i2c_adapter      *adapter = to_i2c_adapter(client->dev.parent);
1160         int                     ret;
1161
1162         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1163                 dev_err(&adapter->dev,
1164                         "OV2640: I2C-Adapter doesn't support SMBUS\n");
1165                 return -EIO;
1166         }
1167
1168         priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
1169         if (!priv)
1170                 return -ENOMEM;
1171
1172         if (client->dev.of_node) {
1173                 priv->clk = devm_clk_get(&client->dev, "xvclk");
1174                 if (IS_ERR(priv->clk))
1175                         return PTR_ERR(priv->clk);
1176                 ret = clk_prepare_enable(priv->clk);
1177                 if (ret)
1178                         return ret;
1179         }
1180
1181         ret = ov2640_probe_dt(client, priv);
1182         if (ret)
1183                 goto err_clk;
1184
1185         v4l2_i2c_subdev_init(&priv->subdev, client, &ov2640_subdev_ops);
1186         priv->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1187         mutex_init(&priv->lock);
1188         v4l2_ctrl_handler_init(&priv->hdl, 2);
1189         priv->hdl.lock = &priv->lock;
1190         v4l2_ctrl_new_std(&priv->hdl, &ov2640_ctrl_ops,
1191                         V4L2_CID_VFLIP, 0, 1, 1, 0);
1192         v4l2_ctrl_new_std(&priv->hdl, &ov2640_ctrl_ops,
1193                         V4L2_CID_HFLIP, 0, 1, 1, 0);
1194         priv->subdev.ctrl_handler = &priv->hdl;
1195         if (priv->hdl.error) {
1196                 ret = priv->hdl.error;
1197                 goto err_hdl;
1198         }
1199 #if defined(CONFIG_MEDIA_CONTROLLER)
1200         priv->pad.flags = MEDIA_PAD_FL_SOURCE;
1201         priv->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1202         ret = media_entity_pads_init(&priv->subdev.entity, 1, &priv->pad);
1203         if (ret < 0)
1204                 goto err_hdl;
1205 #endif
1206
1207         ret = ov2640_video_probe(client);
1208         if (ret < 0)
1209                 goto err_videoprobe;
1210
1211         ret = v4l2_async_register_subdev(&priv->subdev);
1212         if (ret < 0)
1213                 goto err_videoprobe;
1214
1215         dev_info(&adapter->dev, "OV2640 Probed\n");
1216
1217         return 0;
1218
1219 err_videoprobe:
1220         media_entity_cleanup(&priv->subdev.entity);
1221 err_hdl:
1222         v4l2_ctrl_handler_free(&priv->hdl);
1223         mutex_destroy(&priv->lock);
1224 err_clk:
1225         clk_disable_unprepare(priv->clk);
1226         return ret;
1227 }
1228
1229 static int ov2640_remove(struct i2c_client *client)
1230 {
1231         struct ov2640_priv       *priv = to_ov2640(client);
1232
1233         v4l2_async_unregister_subdev(&priv->subdev);
1234         v4l2_ctrl_handler_free(&priv->hdl);
1235         mutex_destroy(&priv->lock);
1236         media_entity_cleanup(&priv->subdev.entity);
1237         v4l2_device_unregister_subdev(&priv->subdev);
1238         clk_disable_unprepare(priv->clk);
1239         return 0;
1240 }
1241
1242 static const struct i2c_device_id ov2640_id[] = {
1243         { "ov2640", 0 },
1244         { }
1245 };
1246 MODULE_DEVICE_TABLE(i2c, ov2640_id);
1247
1248 static const struct of_device_id ov2640_of_match[] = {
1249         {.compatible = "ovti,ov2640", },
1250         {},
1251 };
1252 MODULE_DEVICE_TABLE(of, ov2640_of_match);
1253
1254 static struct i2c_driver ov2640_i2c_driver = {
1255         .driver = {
1256                 .name = "ov2640",
1257                 .of_match_table = of_match_ptr(ov2640_of_match),
1258         },
1259         .probe    = ov2640_probe,
1260         .remove   = ov2640_remove,
1261         .id_table = ov2640_id,
1262 };
1263
1264 module_i2c_driver(ov2640_i2c_driver);
1265
1266 MODULE_DESCRIPTION("Driver for Omni Vision 2640 sensor");
1267 MODULE_AUTHOR("Alberto Panizzo");
1268 MODULE_LICENSE("GPL v2");