123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503 |
- // SPDX-License-Identifier: GPL-2.0
- /*
- * Driver for the OV7251 camera sensor.
- *
- * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
- * Copyright (c) 2017-2018, Linaro Ltd.
- */
- #include <linux/bitops.h>
- #include <linux/clk.h>
- #include <linux/delay.h>
- #include <linux/device.h>
- #include <linux/gpio/consumer.h>
- #include <linux/i2c.h>
- #include <linux/init.h>
- #include <linux/module.h>
- #include <linux/regulator/consumer.h>
- #include <linux/slab.h>
- #include <linux/types.h>
- #include <media/v4l2-ctrls.h>
- #include <media/v4l2-fwnode.h>
- #include <media/v4l2-subdev.h>
- #define OV7251_SC_MODE_SELECT 0x0100
- #define OV7251_SC_MODE_SELECT_SW_STANDBY 0x0
- #define OV7251_SC_MODE_SELECT_STREAMING 0x1
- #define OV7251_CHIP_ID_HIGH 0x300a
- #define OV7251_CHIP_ID_HIGH_BYTE 0x77
- #define OV7251_CHIP_ID_LOW 0x300b
- #define OV7251_CHIP_ID_LOW_BYTE 0x50
- #define OV7251_SC_GP_IO_IN1 0x3029
- #define OV7251_AEC_EXPO_0 0x3500
- #define OV7251_AEC_EXPO_1 0x3501
- #define OV7251_AEC_EXPO_2 0x3502
- #define OV7251_AEC_AGC_ADJ_0 0x350a
- #define OV7251_AEC_AGC_ADJ_1 0x350b
- #define OV7251_TIMING_FORMAT1 0x3820
- #define OV7251_TIMING_FORMAT1_VFLIP BIT(2)
- #define OV7251_TIMING_FORMAT2 0x3821
- #define OV7251_TIMING_FORMAT2_MIRROR BIT(2)
- #define OV7251_PRE_ISP_00 0x5e00
- #define OV7251_PRE_ISP_00_TEST_PATTERN BIT(7)
- struct reg_value {
- u16 reg;
- u8 val;
- };
- struct ov7251_mode_info {
- u32 width;
- u32 height;
- const struct reg_value *data;
- u32 data_size;
- u32 pixel_clock;
- u32 link_freq;
- u16 exposure_max;
- u16 exposure_def;
- struct v4l2_fract timeperframe;
- };
- struct ov7251 {
- struct i2c_client *i2c_client;
- struct device *dev;
- struct v4l2_subdev sd;
- struct media_pad pad;
- struct v4l2_fwnode_endpoint ep;
- struct v4l2_mbus_framefmt fmt;
- struct v4l2_rect crop;
- struct clk *xclk;
- u32 xclk_freq;
- struct regulator *io_regulator;
- struct regulator *core_regulator;
- struct regulator *analog_regulator;
- const struct ov7251_mode_info *current_mode;
- struct v4l2_ctrl_handler ctrls;
- struct v4l2_ctrl *pixel_clock;
- struct v4l2_ctrl *link_freq;
- struct v4l2_ctrl *exposure;
- struct v4l2_ctrl *gain;
- /* Cached register values */
- u8 aec_pk_manual;
- u8 pre_isp_00;
- u8 timing_format1;
- u8 timing_format2;
- struct mutex lock; /* lock to protect power state, ctrls and mode */
- bool power_on;
- struct gpio_desc *enable_gpio;
- };
- static inline struct ov7251 *to_ov7251(struct v4l2_subdev *sd)
- {
- return container_of(sd, struct ov7251, sd);
- }
- static const struct reg_value ov7251_global_init_setting[] = {
- { 0x0103, 0x01 },
- { 0x303b, 0x02 },
- };
- static const struct reg_value ov7251_setting_vga_30fps[] = {
- { 0x3005, 0x00 },
- { 0x3012, 0xc0 },
- { 0x3013, 0xd2 },
- { 0x3014, 0x04 },
- { 0x3016, 0xf0 },
- { 0x3017, 0xf0 },
- { 0x3018, 0xf0 },
- { 0x301a, 0xf0 },
- { 0x301b, 0xf0 },
- { 0x301c, 0xf0 },
- { 0x3023, 0x05 },
- { 0x3037, 0xf0 },
- { 0x3098, 0x04 }, /* pll2 pre divider */
- { 0x3099, 0x28 }, /* pll2 multiplier */
- { 0x309a, 0x05 }, /* pll2 sys divider */
- { 0x309b, 0x04 }, /* pll2 adc divider */
- { 0x309d, 0x00 }, /* pll2 divider */
- { 0x30b0, 0x0a }, /* pll1 pix divider */
- { 0x30b1, 0x01 }, /* pll1 divider */
- { 0x30b3, 0x64 }, /* pll1 multiplier */
- { 0x30b4, 0x03 }, /* pll1 pre divider */
- { 0x30b5, 0x05 }, /* pll1 mipi divider */
- { 0x3106, 0xda },
- { 0x3503, 0x07 },
- { 0x3509, 0x10 },
- { 0x3600, 0x1c },
- { 0x3602, 0x62 },
- { 0x3620, 0xb7 },
- { 0x3622, 0x04 },
- { 0x3626, 0x21 },
- { 0x3627, 0x30 },
- { 0x3630, 0x44 },
- { 0x3631, 0x35 },
- { 0x3634, 0x60 },
- { 0x3636, 0x00 },
- { 0x3662, 0x01 },
- { 0x3663, 0x70 },
- { 0x3664, 0x50 },
- { 0x3666, 0x0a },
- { 0x3669, 0x1a },
- { 0x366a, 0x00 },
- { 0x366b, 0x50 },
- { 0x3673, 0x01 },
- { 0x3674, 0xff },
- { 0x3675, 0x03 },
- { 0x3705, 0xc1 },
- { 0x3709, 0x40 },
- { 0x373c, 0x08 },
- { 0x3742, 0x00 },
- { 0x3757, 0xb3 },
- { 0x3788, 0x00 },
- { 0x37a8, 0x01 },
- { 0x37a9, 0xc0 },
- { 0x3800, 0x00 },
- { 0x3801, 0x04 },
- { 0x3802, 0x00 },
- { 0x3803, 0x04 },
- { 0x3804, 0x02 },
- { 0x3805, 0x8b },
- { 0x3806, 0x01 },
- { 0x3807, 0xeb },
- { 0x3808, 0x02 }, /* width high */
- { 0x3809, 0x80 }, /* width low */
- { 0x380a, 0x01 }, /* height high */
- { 0x380b, 0xe0 }, /* height low */
- { 0x380c, 0x03 }, /* total horiz timing high */
- { 0x380d, 0xa0 }, /* total horiz timing low */
- { 0x380e, 0x06 }, /* total vertical timing high */
- { 0x380f, 0xbc }, /* total vertical timing low */
- { 0x3810, 0x00 },
- { 0x3811, 0x04 },
- { 0x3812, 0x00 },
- { 0x3813, 0x05 },
- { 0x3814, 0x11 },
- { 0x3815, 0x11 },
- { 0x3820, 0x40 },
- { 0x3821, 0x00 },
- { 0x382f, 0x0e },
- { 0x3832, 0x00 },
- { 0x3833, 0x05 },
- { 0x3834, 0x00 },
- { 0x3835, 0x0c },
- { 0x3837, 0x00 },
- { 0x3b80, 0x00 },
- { 0x3b81, 0xa5 },
- { 0x3b82, 0x10 },
- { 0x3b83, 0x00 },
- { 0x3b84, 0x08 },
- { 0x3b85, 0x00 },
- { 0x3b86, 0x01 },
- { 0x3b87, 0x00 },
- { 0x3b88, 0x00 },
- { 0x3b89, 0x00 },
- { 0x3b8a, 0x00 },
- { 0x3b8b, 0x05 },
- { 0x3b8c, 0x00 },
- { 0x3b8d, 0x00 },
- { 0x3b8e, 0x00 },
- { 0x3b8f, 0x1a },
- { 0x3b94, 0x05 },
- { 0x3b95, 0xf2 },
- { 0x3b96, 0x40 },
- { 0x3c00, 0x89 },
- { 0x3c01, 0x63 },
- { 0x3c02, 0x01 },
- { 0x3c03, 0x00 },
- { 0x3c04, 0x00 },
- { 0x3c05, 0x03 },
- { 0x3c06, 0x00 },
- { 0x3c07, 0x06 },
- { 0x3c0c, 0x01 },
- { 0x3c0d, 0xd0 },
- { 0x3c0e, 0x02 },
- { 0x3c0f, 0x0a },
- { 0x4001, 0x42 },
- { 0x4004, 0x04 },
- { 0x4005, 0x00 },
- { 0x404e, 0x01 },
- { 0x4300, 0xff },
- { 0x4301, 0x00 },
- { 0x4315, 0x00 },
- { 0x4501, 0x48 },
- { 0x4600, 0x00 },
- { 0x4601, 0x4e },
- { 0x4801, 0x0f },
- { 0x4806, 0x0f },
- { 0x4819, 0xaa },
- { 0x4823, 0x3e },
- { 0x4837, 0x19 },
- { 0x4a0d, 0x00 },
- { 0x4a47, 0x7f },
- { 0x4a49, 0xf0 },
- { 0x4a4b, 0x30 },
- { 0x5000, 0x85 },
- { 0x5001, 0x80 },
- };
- static const struct reg_value ov7251_setting_vga_60fps[] = {
- { 0x3005, 0x00 },
- { 0x3012, 0xc0 },
- { 0x3013, 0xd2 },
- { 0x3014, 0x04 },
- { 0x3016, 0x10 },
- { 0x3017, 0x00 },
- { 0x3018, 0x00 },
- { 0x301a, 0x00 },
- { 0x301b, 0x00 },
- { 0x301c, 0x00 },
- { 0x3023, 0x05 },
- { 0x3037, 0xf0 },
- { 0x3098, 0x04 }, /* pll2 pre divider */
- { 0x3099, 0x28 }, /* pll2 multiplier */
- { 0x309a, 0x05 }, /* pll2 sys divider */
- { 0x309b, 0x04 }, /* pll2 adc divider */
- { 0x309d, 0x00 }, /* pll2 divider */
- { 0x30b0, 0x0a }, /* pll1 pix divider */
- { 0x30b1, 0x01 }, /* pll1 divider */
- { 0x30b3, 0x64 }, /* pll1 multiplier */
- { 0x30b4, 0x03 }, /* pll1 pre divider */
- { 0x30b5, 0x05 }, /* pll1 mipi divider */
- { 0x3106, 0xda },
- { 0x3503, 0x07 },
- { 0x3509, 0x10 },
- { 0x3600, 0x1c },
- { 0x3602, 0x62 },
- { 0x3620, 0xb7 },
- { 0x3622, 0x04 },
- { 0x3626, 0x21 },
- { 0x3627, 0x30 },
- { 0x3630, 0x44 },
- { 0x3631, 0x35 },
- { 0x3634, 0x60 },
- { 0x3636, 0x00 },
- { 0x3662, 0x01 },
- { 0x3663, 0x70 },
- { 0x3664, 0x50 },
- { 0x3666, 0x0a },
- { 0x3669, 0x1a },
- { 0x366a, 0x00 },
- { 0x366b, 0x50 },
- { 0x3673, 0x01 },
- { 0x3674, 0xff },
- { 0x3675, 0x03 },
- { 0x3705, 0xc1 },
- { 0x3709, 0x40 },
- { 0x373c, 0x08 },
- { 0x3742, 0x00 },
- { 0x3757, 0xb3 },
- { 0x3788, 0x00 },
- { 0x37a8, 0x01 },
- { 0x37a9, 0xc0 },
- { 0x3800, 0x00 },
- { 0x3801, 0x04 },
- { 0x3802, 0x00 },
- { 0x3803, 0x04 },
- { 0x3804, 0x02 },
- { 0x3805, 0x8b },
- { 0x3806, 0x01 },
- { 0x3807, 0xeb },
- { 0x3808, 0x02 }, /* width high */
- { 0x3809, 0x80 }, /* width low */
- { 0x380a, 0x01 }, /* height high */
- { 0x380b, 0xe0 }, /* height low */
- { 0x380c, 0x03 }, /* total horiz timing high */
- { 0x380d, 0xa0 }, /* total horiz timing low */
- { 0x380e, 0x03 }, /* total vertical timing high */
- { 0x380f, 0x5c }, /* total vertical timing low */
- { 0x3810, 0x00 },
- { 0x3811, 0x04 },
- { 0x3812, 0x00 },
- { 0x3813, 0x05 },
- { 0x3814, 0x11 },
- { 0x3815, 0x11 },
- { 0x3820, 0x40 },
- { 0x3821, 0x00 },
- { 0x382f, 0x0e },
- { 0x3832, 0x00 },
- { 0x3833, 0x05 },
- { 0x3834, 0x00 },
- { 0x3835, 0x0c },
- { 0x3837, 0x00 },
- { 0x3b80, 0x00 },
- { 0x3b81, 0xa5 },
- { 0x3b82, 0x10 },
- { 0x3b83, 0x00 },
- { 0x3b84, 0x08 },
- { 0x3b85, 0x00 },
- { 0x3b86, 0x01 },
- { 0x3b87, 0x00 },
- { 0x3b88, 0x00 },
- { 0x3b89, 0x00 },
- { 0x3b8a, 0x00 },
- { 0x3b8b, 0x05 },
- { 0x3b8c, 0x00 },
- { 0x3b8d, 0x00 },
- { 0x3b8e, 0x00 },
- { 0x3b8f, 0x1a },
- { 0x3b94, 0x05 },
- { 0x3b95, 0xf2 },
- { 0x3b96, 0x40 },
- { 0x3c00, 0x89 },
- { 0x3c01, 0x63 },
- { 0x3c02, 0x01 },
- { 0x3c03, 0x00 },
- { 0x3c04, 0x00 },
- { 0x3c05, 0x03 },
- { 0x3c06, 0x00 },
- { 0x3c07, 0x06 },
- { 0x3c0c, 0x01 },
- { 0x3c0d, 0xd0 },
- { 0x3c0e, 0x02 },
- { 0x3c0f, 0x0a },
- { 0x4001, 0x42 },
- { 0x4004, 0x04 },
- { 0x4005, 0x00 },
- { 0x404e, 0x01 },
- { 0x4300, 0xff },
- { 0x4301, 0x00 },
- { 0x4315, 0x00 },
- { 0x4501, 0x48 },
- { 0x4600, 0x00 },
- { 0x4601, 0x4e },
- { 0x4801, 0x0f },
- { 0x4806, 0x0f },
- { 0x4819, 0xaa },
- { 0x4823, 0x3e },
- { 0x4837, 0x19 },
- { 0x4a0d, 0x00 },
- { 0x4a47, 0x7f },
- { 0x4a49, 0xf0 },
- { 0x4a4b, 0x30 },
- { 0x5000, 0x85 },
- { 0x5001, 0x80 },
- };
- static const struct reg_value ov7251_setting_vga_90fps[] = {
- { 0x3005, 0x00 },
- { 0x3012, 0xc0 },
- { 0x3013, 0xd2 },
- { 0x3014, 0x04 },
- { 0x3016, 0x10 },
- { 0x3017, 0x00 },
- { 0x3018, 0x00 },
- { 0x301a, 0x00 },
- { 0x301b, 0x00 },
- { 0x301c, 0x00 },
- { 0x3023, 0x05 },
- { 0x3037, 0xf0 },
- { 0x3098, 0x04 }, /* pll2 pre divider */
- { 0x3099, 0x28 }, /* pll2 multiplier */
- { 0x309a, 0x05 }, /* pll2 sys divider */
- { 0x309b, 0x04 }, /* pll2 adc divider */
- { 0x309d, 0x00 }, /* pll2 divider */
- { 0x30b0, 0x0a }, /* pll1 pix divider */
- { 0x30b1, 0x01 }, /* pll1 divider */
- { 0x30b3, 0x64 }, /* pll1 multiplier */
- { 0x30b4, 0x03 }, /* pll1 pre divider */
- { 0x30b5, 0x05 }, /* pll1 mipi divider */
- { 0x3106, 0xda },
- { 0x3503, 0x07 },
- { 0x3509, 0x10 },
- { 0x3600, 0x1c },
- { 0x3602, 0x62 },
- { 0x3620, 0xb7 },
- { 0x3622, 0x04 },
- { 0x3626, 0x21 },
- { 0x3627, 0x30 },
- { 0x3630, 0x44 },
- { 0x3631, 0x35 },
- { 0x3634, 0x60 },
- { 0x3636, 0x00 },
- { 0x3662, 0x01 },
- { 0x3663, 0x70 },
- { 0x3664, 0x50 },
- { 0x3666, 0x0a },
- { 0x3669, 0x1a },
- { 0x366a, 0x00 },
- { 0x366b, 0x50 },
- { 0x3673, 0x01 },
- { 0x3674, 0xff },
- { 0x3675, 0x03 },
- { 0x3705, 0xc1 },
- { 0x3709, 0x40 },
- { 0x373c, 0x08 },
- { 0x3742, 0x00 },
- { 0x3757, 0xb3 },
- { 0x3788, 0x00 },
- { 0x37a8, 0x01 },
- { 0x37a9, 0xc0 },
- { 0x3800, 0x00 },
- { 0x3801, 0x04 },
- { 0x3802, 0x00 },
- { 0x3803, 0x04 },
- { 0x3804, 0x02 },
- { 0x3805, 0x8b },
- { 0x3806, 0x01 },
- { 0x3807, 0xeb },
- { 0x3808, 0x02 }, /* width high */
- { 0x3809, 0x80 }, /* width low */
- { 0x380a, 0x01 }, /* height high */
- { 0x380b, 0xe0 }, /* height low */
- { 0x380c, 0x03 }, /* total horiz timing high */
- { 0x380d, 0xa0 }, /* total horiz timing low */
- { 0x380e, 0x02 }, /* total vertical timing high */
- { 0x380f, 0x3c }, /* total vertical timing low */
- { 0x3810, 0x00 },
- { 0x3811, 0x04 },
- { 0x3812, 0x00 },
- { 0x3813, 0x05 },
- { 0x3814, 0x11 },
- { 0x3815, 0x11 },
- { 0x3820, 0x40 },
- { 0x3821, 0x00 },
- { 0x382f, 0x0e },
- { 0x3832, 0x00 },
- { 0x3833, 0x05 },
- { 0x3834, 0x00 },
- { 0x3835, 0x0c },
- { 0x3837, 0x00 },
- { 0x3b80, 0x00 },
- { 0x3b81, 0xa5 },
- { 0x3b82, 0x10 },
- { 0x3b83, 0x00 },
- { 0x3b84, 0x08 },
- { 0x3b85, 0x00 },
- { 0x3b86, 0x01 },
- { 0x3b87, 0x00 },
- { 0x3b88, 0x00 },
- { 0x3b89, 0x00 },
- { 0x3b8a, 0x00 },
- { 0x3b8b, 0x05 },
- { 0x3b8c, 0x00 },
- { 0x3b8d, 0x00 },
- { 0x3b8e, 0x00 },
- { 0x3b8f, 0x1a },
- { 0x3b94, 0x05 },
- { 0x3b95, 0xf2 },
- { 0x3b96, 0x40 },
- { 0x3c00, 0x89 },
- { 0x3c01, 0x63 },
- { 0x3c02, 0x01 },
- { 0x3c03, 0x00 },
- { 0x3c04, 0x00 },
- { 0x3c05, 0x03 },
- { 0x3c06, 0x00 },
- { 0x3c07, 0x06 },
- { 0x3c0c, 0x01 },
- { 0x3c0d, 0xd0 },
- { 0x3c0e, 0x02 },
- { 0x3c0f, 0x0a },
- { 0x4001, 0x42 },
- { 0x4004, 0x04 },
- { 0x4005, 0x00 },
- { 0x404e, 0x01 },
- { 0x4300, 0xff },
- { 0x4301, 0x00 },
- { 0x4315, 0x00 },
- { 0x4501, 0x48 },
- { 0x4600, 0x00 },
- { 0x4601, 0x4e },
- { 0x4801, 0x0f },
- { 0x4806, 0x0f },
- { 0x4819, 0xaa },
- { 0x4823, 0x3e },
- { 0x4837, 0x19 },
- { 0x4a0d, 0x00 },
- { 0x4a47, 0x7f },
- { 0x4a49, 0xf0 },
- { 0x4a4b, 0x30 },
- { 0x5000, 0x85 },
- { 0x5001, 0x80 },
- };
- static const s64 link_freq[] = {
- 240000000,
- };
- static const struct ov7251_mode_info ov7251_mode_info_data[] = {
- {
- .width = 640,
- .height = 480,
- .data = ov7251_setting_vga_30fps,
- .data_size = ARRAY_SIZE(ov7251_setting_vga_30fps),
- .pixel_clock = 48000000,
- .link_freq = 0, /* an index in link_freq[] */
- .exposure_max = 1704,
- .exposure_def = 504,
- .timeperframe = {
- .numerator = 100,
- .denominator = 3000
- }
- },
- {
- .width = 640,
- .height = 480,
- .data = ov7251_setting_vga_60fps,
- .data_size = ARRAY_SIZE(ov7251_setting_vga_60fps),
- .pixel_clock = 48000000,
- .link_freq = 0, /* an index in link_freq[] */
- .exposure_max = 840,
- .exposure_def = 504,
- .timeperframe = {
- .numerator = 100,
- .denominator = 6014
- }
- },
- {
- .width = 640,
- .height = 480,
- .data = ov7251_setting_vga_90fps,
- .data_size = ARRAY_SIZE(ov7251_setting_vga_90fps),
- .pixel_clock = 48000000,
- .link_freq = 0, /* an index in link_freq[] */
- .exposure_max = 552,
- .exposure_def = 504,
- .timeperframe = {
- .numerator = 100,
- .denominator = 9043
- }
- },
- };
- static int ov7251_regulators_enable(struct ov7251 *ov7251)
- {
- int ret;
- /* OV7251 power up sequence requires core regulator
- * to be enabled not earlier than io regulator
- */
- ret = regulator_enable(ov7251->io_regulator);
- if (ret < 0) {
- dev_err(ov7251->dev, "set io voltage failed\n");
- return ret;
- }
- ret = regulator_enable(ov7251->analog_regulator);
- if (ret) {
- dev_err(ov7251->dev, "set analog voltage failed\n");
- goto err_disable_io;
- }
- ret = regulator_enable(ov7251->core_regulator);
- if (ret) {
- dev_err(ov7251->dev, "set core voltage failed\n");
- goto err_disable_analog;
- }
- return 0;
- err_disable_analog:
- regulator_disable(ov7251->analog_regulator);
- err_disable_io:
- regulator_disable(ov7251->io_regulator);
- return ret;
- }
- static void ov7251_regulators_disable(struct ov7251 *ov7251)
- {
- int ret;
- ret = regulator_disable(ov7251->core_regulator);
- if (ret < 0)
- dev_err(ov7251->dev, "core regulator disable failed\n");
- ret = regulator_disable(ov7251->analog_regulator);
- if (ret < 0)
- dev_err(ov7251->dev, "analog regulator disable failed\n");
- ret = regulator_disable(ov7251->io_regulator);
- if (ret < 0)
- dev_err(ov7251->dev, "io regulator disable failed\n");
- }
- static int ov7251_write_reg(struct ov7251 *ov7251, u16 reg, u8 val)
- {
- u8 regbuf[3];
- int ret;
- regbuf[0] = reg >> 8;
- regbuf[1] = reg & 0xff;
- regbuf[2] = val;
- ret = i2c_master_send(ov7251->i2c_client, regbuf, 3);
- if (ret < 0) {
- dev_err(ov7251->dev, "%s: write reg error %d: reg=%x, val=%x\n",
- __func__, ret, reg, val);
- return ret;
- }
- return 0;
- }
- static int ov7251_write_seq_regs(struct ov7251 *ov7251, u16 reg, u8 *val,
- u8 num)
- {
- u8 regbuf[5];
- u8 nregbuf = sizeof(reg) + num * sizeof(*val);
- int ret = 0;
- if (nregbuf > sizeof(regbuf))
- return -EINVAL;
- regbuf[0] = reg >> 8;
- regbuf[1] = reg & 0xff;
- memcpy(regbuf + 2, val, num);
- ret = i2c_master_send(ov7251->i2c_client, regbuf, nregbuf);
- if (ret < 0) {
- dev_err(ov7251->dev,
- "%s: write seq regs error %d: first reg=%x\n",
- __func__, ret, reg);
- return ret;
- }
- return 0;
- }
- static int ov7251_read_reg(struct ov7251 *ov7251, u16 reg, u8 *val)
- {
- u8 regbuf[2];
- int ret;
- regbuf[0] = reg >> 8;
- regbuf[1] = reg & 0xff;
- ret = i2c_master_send(ov7251->i2c_client, regbuf, 2);
- if (ret < 0) {
- dev_err(ov7251->dev, "%s: write reg error %d: reg=%x\n",
- __func__, ret, reg);
- return ret;
- }
- ret = i2c_master_recv(ov7251->i2c_client, val, 1);
- if (ret < 0) {
- dev_err(ov7251->dev, "%s: read reg error %d: reg=%x\n",
- __func__, ret, reg);
- return ret;
- }
- return 0;
- }
- static int ov7251_set_exposure(struct ov7251 *ov7251, s32 exposure)
- {
- u16 reg;
- u8 val[3];
- reg = OV7251_AEC_EXPO_0;
- val[0] = (exposure & 0xf000) >> 12; /* goes to OV7251_AEC_EXPO_0 */
- val[1] = (exposure & 0x0ff0) >> 4; /* goes to OV7251_AEC_EXPO_1 */
- val[2] = (exposure & 0x000f) << 4; /* goes to OV7251_AEC_EXPO_2 */
- return ov7251_write_seq_regs(ov7251, reg, val, 3);
- }
- static int ov7251_set_gain(struct ov7251 *ov7251, s32 gain)
- {
- u16 reg;
- u8 val[2];
- reg = OV7251_AEC_AGC_ADJ_0;
- val[0] = (gain & 0x0300) >> 8; /* goes to OV7251_AEC_AGC_ADJ_0 */
- val[1] = gain & 0xff; /* goes to OV7251_AEC_AGC_ADJ_1 */
- return ov7251_write_seq_regs(ov7251, reg, val, 2);
- }
- static int ov7251_set_register_array(struct ov7251 *ov7251,
- const struct reg_value *settings,
- unsigned int num_settings)
- {
- unsigned int i;
- int ret;
- for (i = 0; i < num_settings; ++i, ++settings) {
- ret = ov7251_write_reg(ov7251, settings->reg, settings->val);
- if (ret < 0)
- return ret;
- }
- return 0;
- }
- static int ov7251_set_power_on(struct ov7251 *ov7251)
- {
- int ret;
- u32 wait_us;
- ret = ov7251_regulators_enable(ov7251);
- if (ret < 0)
- return ret;
- ret = clk_prepare_enable(ov7251->xclk);
- if (ret < 0) {
- dev_err(ov7251->dev, "clk prepare enable failed\n");
- ov7251_regulators_disable(ov7251);
- return ret;
- }
- gpiod_set_value_cansleep(ov7251->enable_gpio, 1);
- /* wait at least 65536 external clock cycles */
- wait_us = DIV_ROUND_UP(65536 * 1000,
- DIV_ROUND_UP(ov7251->xclk_freq, 1000));
- usleep_range(wait_us, wait_us + 1000);
- return 0;
- }
- static void ov7251_set_power_off(struct ov7251 *ov7251)
- {
- clk_disable_unprepare(ov7251->xclk);
- gpiod_set_value_cansleep(ov7251->enable_gpio, 0);
- ov7251_regulators_disable(ov7251);
- }
- static int ov7251_s_power(struct v4l2_subdev *sd, int on)
- {
- struct ov7251 *ov7251 = to_ov7251(sd);
- int ret = 0;
- mutex_lock(&ov7251->lock);
- /* If the power state is not modified - no work to do. */
- if (ov7251->power_on == !!on)
- goto exit;
- if (on) {
- ret = ov7251_set_power_on(ov7251);
- if (ret < 0)
- goto exit;
- ret = ov7251_set_register_array(ov7251,
- ov7251_global_init_setting,
- ARRAY_SIZE(ov7251_global_init_setting));
- if (ret < 0) {
- dev_err(ov7251->dev, "could not set init registers\n");
- ov7251_set_power_off(ov7251);
- goto exit;
- }
- ov7251->power_on = true;
- } else {
- ov7251_set_power_off(ov7251);
- ov7251->power_on = false;
- }
- exit:
- mutex_unlock(&ov7251->lock);
- return ret;
- }
- static int ov7251_set_hflip(struct ov7251 *ov7251, s32 value)
- {
- u8 val = ov7251->timing_format2;
- int ret;
- if (value)
- val |= OV7251_TIMING_FORMAT2_MIRROR;
- else
- val &= ~OV7251_TIMING_FORMAT2_MIRROR;
- ret = ov7251_write_reg(ov7251, OV7251_TIMING_FORMAT2, val);
- if (!ret)
- ov7251->timing_format2 = val;
- return ret;
- }
- static int ov7251_set_vflip(struct ov7251 *ov7251, s32 value)
- {
- u8 val = ov7251->timing_format1;
- int ret;
- if (value)
- val |= OV7251_TIMING_FORMAT1_VFLIP;
- else
- val &= ~OV7251_TIMING_FORMAT1_VFLIP;
- ret = ov7251_write_reg(ov7251, OV7251_TIMING_FORMAT1, val);
- if (!ret)
- ov7251->timing_format1 = val;
- return ret;
- }
- static int ov7251_set_test_pattern(struct ov7251 *ov7251, s32 value)
- {
- u8 val = ov7251->pre_isp_00;
- int ret;
- if (value)
- val |= OV7251_PRE_ISP_00_TEST_PATTERN;
- else
- val &= ~OV7251_PRE_ISP_00_TEST_PATTERN;
- ret = ov7251_write_reg(ov7251, OV7251_PRE_ISP_00, val);
- if (!ret)
- ov7251->pre_isp_00 = val;
- return ret;
- }
- static const char * const ov7251_test_pattern_menu[] = {
- "Disabled",
- "Vertical Pattern Bars",
- };
- static int ov7251_s_ctrl(struct v4l2_ctrl *ctrl)
- {
- struct ov7251 *ov7251 = container_of(ctrl->handler,
- struct ov7251, ctrls);
- int ret;
- /* v4l2_ctrl_lock() locks our mutex */
- if (!ov7251->power_on)
- return 0;
- switch (ctrl->id) {
- case V4L2_CID_EXPOSURE:
- ret = ov7251_set_exposure(ov7251, ctrl->val);
- break;
- case V4L2_CID_GAIN:
- ret = ov7251_set_gain(ov7251, ctrl->val);
- break;
- case V4L2_CID_TEST_PATTERN:
- ret = ov7251_set_test_pattern(ov7251, ctrl->val);
- break;
- case V4L2_CID_HFLIP:
- ret = ov7251_set_hflip(ov7251, ctrl->val);
- break;
- case V4L2_CID_VFLIP:
- ret = ov7251_set_vflip(ov7251, ctrl->val);
- break;
- default:
- ret = -EINVAL;
- break;
- }
- return ret;
- }
- static const struct v4l2_ctrl_ops ov7251_ctrl_ops = {
- .s_ctrl = ov7251_s_ctrl,
- };
- static int ov7251_enum_mbus_code(struct v4l2_subdev *sd,
- struct v4l2_subdev_pad_config *cfg,
- struct v4l2_subdev_mbus_code_enum *code)
- {
- if (code->index > 0)
- return -EINVAL;
- code->code = MEDIA_BUS_FMT_Y10_1X10;
- return 0;
- }
- static int ov7251_enum_frame_size(struct v4l2_subdev *subdev,
- struct v4l2_subdev_pad_config *cfg,
- struct v4l2_subdev_frame_size_enum *fse)
- {
- if (fse->code != MEDIA_BUS_FMT_Y10_1X10)
- return -EINVAL;
- if (fse->index >= ARRAY_SIZE(ov7251_mode_info_data))
- return -EINVAL;
- fse->min_width = ov7251_mode_info_data[fse->index].width;
- fse->max_width = ov7251_mode_info_data[fse->index].width;
- fse->min_height = ov7251_mode_info_data[fse->index].height;
- fse->max_height = ov7251_mode_info_data[fse->index].height;
- return 0;
- }
- static int ov7251_enum_frame_ival(struct v4l2_subdev *subdev,
- struct v4l2_subdev_pad_config *cfg,
- struct v4l2_subdev_frame_interval_enum *fie)
- {
- unsigned int index = fie->index;
- unsigned int i;
- for (i = 0; i < ARRAY_SIZE(ov7251_mode_info_data); i++) {
- if (fie->width != ov7251_mode_info_data[i].width ||
- fie->height != ov7251_mode_info_data[i].height)
- continue;
- if (index-- == 0) {
- fie->interval = ov7251_mode_info_data[i].timeperframe;
- return 0;
- }
- }
- return -EINVAL;
- }
- static struct v4l2_mbus_framefmt *
- __ov7251_get_pad_format(struct ov7251 *ov7251,
- struct v4l2_subdev_pad_config *cfg,
- unsigned int pad,
- enum v4l2_subdev_format_whence which)
- {
- switch (which) {
- case V4L2_SUBDEV_FORMAT_TRY:
- return v4l2_subdev_get_try_format(&ov7251->sd, cfg, pad);
- case V4L2_SUBDEV_FORMAT_ACTIVE:
- return &ov7251->fmt;
- default:
- return NULL;
- }
- }
- static int ov7251_get_format(struct v4l2_subdev *sd,
- struct v4l2_subdev_pad_config *cfg,
- struct v4l2_subdev_format *format)
- {
- struct ov7251 *ov7251 = to_ov7251(sd);
- mutex_lock(&ov7251->lock);
- format->format = *__ov7251_get_pad_format(ov7251, cfg, format->pad,
- format->which);
- mutex_unlock(&ov7251->lock);
- return 0;
- }
- static struct v4l2_rect *
- __ov7251_get_pad_crop(struct ov7251 *ov7251, struct v4l2_subdev_pad_config *cfg,
- unsigned int pad, enum v4l2_subdev_format_whence which)
- {
- switch (which) {
- case V4L2_SUBDEV_FORMAT_TRY:
- return v4l2_subdev_get_try_crop(&ov7251->sd, cfg, pad);
- case V4L2_SUBDEV_FORMAT_ACTIVE:
- return &ov7251->crop;
- default:
- return NULL;
- }
- }
- static inline u32 avg_fps(const struct v4l2_fract *t)
- {
- return (t->denominator + (t->numerator >> 1)) / t->numerator;
- }
- static const struct ov7251_mode_info *
- ov7251_find_mode_by_ival(struct ov7251 *ov7251, struct v4l2_fract *timeperframe)
- {
- const struct ov7251_mode_info *mode = ov7251->current_mode;
- unsigned int fps_req = avg_fps(timeperframe);
- unsigned int max_dist_match = (unsigned int) -1;
- unsigned int i, n = 0;
- for (i = 0; i < ARRAY_SIZE(ov7251_mode_info_data); i++) {
- unsigned int dist;
- unsigned int fps_tmp;
- if (mode->width != ov7251_mode_info_data[i].width ||
- mode->height != ov7251_mode_info_data[i].height)
- continue;
- fps_tmp = avg_fps(&ov7251_mode_info_data[i].timeperframe);
- dist = abs(fps_req - fps_tmp);
- if (dist < max_dist_match) {
- n = i;
- max_dist_match = dist;
- }
- }
- return &ov7251_mode_info_data[n];
- }
- static int ov7251_set_format(struct v4l2_subdev *sd,
- struct v4l2_subdev_pad_config *cfg,
- struct v4l2_subdev_format *format)
- {
- struct ov7251 *ov7251 = to_ov7251(sd);
- struct v4l2_mbus_framefmt *__format;
- struct v4l2_rect *__crop;
- const struct ov7251_mode_info *new_mode;
- int ret = 0;
- mutex_lock(&ov7251->lock);
- __crop = __ov7251_get_pad_crop(ov7251, cfg, format->pad, format->which);
- new_mode = v4l2_find_nearest_size(ov7251_mode_info_data,
- ARRAY_SIZE(ov7251_mode_info_data),
- width, height,
- format->format.width, format->format.height);
- __crop->width = new_mode->width;
- __crop->height = new_mode->height;
- if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
- ret = __v4l2_ctrl_s_ctrl_int64(ov7251->pixel_clock,
- new_mode->pixel_clock);
- if (ret < 0)
- goto exit;
- ret = __v4l2_ctrl_s_ctrl(ov7251->link_freq,
- new_mode->link_freq);
- if (ret < 0)
- goto exit;
- ret = __v4l2_ctrl_modify_range(ov7251->exposure,
- 1, new_mode->exposure_max,
- 1, new_mode->exposure_def);
- if (ret < 0)
- goto exit;
- ret = __v4l2_ctrl_s_ctrl(ov7251->exposure,
- new_mode->exposure_def);
- if (ret < 0)
- goto exit;
- ret = __v4l2_ctrl_s_ctrl(ov7251->gain, 16);
- if (ret < 0)
- goto exit;
- ov7251->current_mode = new_mode;
- }
- __format = __ov7251_get_pad_format(ov7251, cfg, format->pad,
- format->which);
- __format->width = __crop->width;
- __format->height = __crop->height;
- __format->code = MEDIA_BUS_FMT_Y10_1X10;
- __format->field = V4L2_FIELD_NONE;
- __format->colorspace = V4L2_COLORSPACE_SRGB;
- __format->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(__format->colorspace);
- __format->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
- __format->colorspace, __format->ycbcr_enc);
- __format->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(__format->colorspace);
- format->format = *__format;
- exit:
- mutex_unlock(&ov7251->lock);
- return ret;
- }
- static int ov7251_entity_init_cfg(struct v4l2_subdev *subdev,
- struct v4l2_subdev_pad_config *cfg)
- {
- struct v4l2_subdev_format fmt = {
- .which = cfg ? V4L2_SUBDEV_FORMAT_TRY
- : V4L2_SUBDEV_FORMAT_ACTIVE,
- .format = {
- .width = 640,
- .height = 480
- }
- };
- ov7251_set_format(subdev, cfg, &fmt);
- return 0;
- }
- static int ov7251_get_selection(struct v4l2_subdev *sd,
- struct v4l2_subdev_pad_config *cfg,
- struct v4l2_subdev_selection *sel)
- {
- struct ov7251 *ov7251 = to_ov7251(sd);
- if (sel->target != V4L2_SEL_TGT_CROP)
- return -EINVAL;
- mutex_lock(&ov7251->lock);
- sel->r = *__ov7251_get_pad_crop(ov7251, cfg, sel->pad,
- sel->which);
- mutex_unlock(&ov7251->lock);
- return 0;
- }
- static int ov7251_s_stream(struct v4l2_subdev *subdev, int enable)
- {
- struct ov7251 *ov7251 = to_ov7251(subdev);
- int ret;
- mutex_lock(&ov7251->lock);
- if (enable) {
- ret = ov7251_set_register_array(ov7251,
- ov7251->current_mode->data,
- ov7251->current_mode->data_size);
- if (ret < 0) {
- dev_err(ov7251->dev, "could not set mode %dx%d\n",
- ov7251->current_mode->width,
- ov7251->current_mode->height);
- goto exit;
- }
- ret = __v4l2_ctrl_handler_setup(&ov7251->ctrls);
- if (ret < 0) {
- dev_err(ov7251->dev, "could not sync v4l2 controls\n");
- goto exit;
- }
- ret = ov7251_write_reg(ov7251, OV7251_SC_MODE_SELECT,
- OV7251_SC_MODE_SELECT_STREAMING);
- } else {
- ret = ov7251_write_reg(ov7251, OV7251_SC_MODE_SELECT,
- OV7251_SC_MODE_SELECT_SW_STANDBY);
- }
- exit:
- mutex_unlock(&ov7251->lock);
- return ret;
- }
- static int ov7251_get_frame_interval(struct v4l2_subdev *subdev,
- struct v4l2_subdev_frame_interval *fi)
- {
- struct ov7251 *ov7251 = to_ov7251(subdev);
- mutex_lock(&ov7251->lock);
- fi->interval = ov7251->current_mode->timeperframe;
- mutex_unlock(&ov7251->lock);
- return 0;
- }
- static int ov7251_set_frame_interval(struct v4l2_subdev *subdev,
- struct v4l2_subdev_frame_interval *fi)
- {
- struct ov7251 *ov7251 = to_ov7251(subdev);
- const struct ov7251_mode_info *new_mode;
- int ret = 0;
- mutex_lock(&ov7251->lock);
- new_mode = ov7251_find_mode_by_ival(ov7251, &fi->interval);
- if (new_mode != ov7251->current_mode) {
- ret = __v4l2_ctrl_s_ctrl_int64(ov7251->pixel_clock,
- new_mode->pixel_clock);
- if (ret < 0)
- goto exit;
- ret = __v4l2_ctrl_s_ctrl(ov7251->link_freq,
- new_mode->link_freq);
- if (ret < 0)
- goto exit;
- ret = __v4l2_ctrl_modify_range(ov7251->exposure,
- 1, new_mode->exposure_max,
- 1, new_mode->exposure_def);
- if (ret < 0)
- goto exit;
- ret = __v4l2_ctrl_s_ctrl(ov7251->exposure,
- new_mode->exposure_def);
- if (ret < 0)
- goto exit;
- ret = __v4l2_ctrl_s_ctrl(ov7251->gain, 16);
- if (ret < 0)
- goto exit;
- ov7251->current_mode = new_mode;
- }
- fi->interval = ov7251->current_mode->timeperframe;
- exit:
- mutex_unlock(&ov7251->lock);
- return ret;
- }
- static const struct v4l2_subdev_core_ops ov7251_core_ops = {
- .s_power = ov7251_s_power,
- };
- static const struct v4l2_subdev_video_ops ov7251_video_ops = {
- .s_stream = ov7251_s_stream,
- .g_frame_interval = ov7251_get_frame_interval,
- .s_frame_interval = ov7251_set_frame_interval,
- };
- static const struct v4l2_subdev_pad_ops ov7251_subdev_pad_ops = {
- .init_cfg = ov7251_entity_init_cfg,
- .enum_mbus_code = ov7251_enum_mbus_code,
- .enum_frame_size = ov7251_enum_frame_size,
- .enum_frame_interval = ov7251_enum_frame_ival,
- .get_fmt = ov7251_get_format,
- .set_fmt = ov7251_set_format,
- .get_selection = ov7251_get_selection,
- };
- static const struct v4l2_subdev_ops ov7251_subdev_ops = {
- .core = &ov7251_core_ops,
- .video = &ov7251_video_ops,
- .pad = &ov7251_subdev_pad_ops,
- };
- static int ov7251_probe(struct i2c_client *client)
- {
- struct device *dev = &client->dev;
- struct fwnode_handle *endpoint;
- struct ov7251 *ov7251;
- u8 chip_id_high, chip_id_low, chip_rev;
- int ret;
- ov7251 = devm_kzalloc(dev, sizeof(struct ov7251), GFP_KERNEL);
- if (!ov7251)
- return -ENOMEM;
- ov7251->i2c_client = client;
- ov7251->dev = dev;
- endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
- if (!endpoint) {
- dev_err(dev, "endpoint node not found\n");
- return -EINVAL;
- }
- ret = v4l2_fwnode_endpoint_parse(endpoint, &ov7251->ep);
- fwnode_handle_put(endpoint);
- if (ret < 0) {
- dev_err(dev, "parsing endpoint node failed\n");
- return ret;
- }
- if (ov7251->ep.bus_type != V4L2_MBUS_CSI2) {
- dev_err(dev, "invalid bus type (%u), must be CSI2 (%u)\n",
- ov7251->ep.bus_type, V4L2_MBUS_CSI2);
- return -EINVAL;
- }
- /* get system clock (xclk) */
- ov7251->xclk = devm_clk_get(dev, "xclk");
- if (IS_ERR(ov7251->xclk)) {
- dev_err(dev, "could not get xclk");
- return PTR_ERR(ov7251->xclk);
- }
- ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency",
- &ov7251->xclk_freq);
- if (ret) {
- dev_err(dev, "could not get xclk frequency\n");
- return ret;
- }
- /* external clock must be 24MHz, allow 1% tolerance */
- if (ov7251->xclk_freq < 23760000 || ov7251->xclk_freq > 24240000) {
- dev_err(dev, "external clock frequency %u is not supported\n",
- ov7251->xclk_freq);
- return -EINVAL;
- }
- ret = clk_set_rate(ov7251->xclk, ov7251->xclk_freq);
- if (ret) {
- dev_err(dev, "could not set xclk frequency\n");
- return ret;
- }
- ov7251->io_regulator = devm_regulator_get(dev, "vdddo");
- if (IS_ERR(ov7251->io_regulator)) {
- dev_err(dev, "cannot get io regulator\n");
- return PTR_ERR(ov7251->io_regulator);
- }
- ov7251->core_regulator = devm_regulator_get(dev, "vddd");
- if (IS_ERR(ov7251->core_regulator)) {
- dev_err(dev, "cannot get core regulator\n");
- return PTR_ERR(ov7251->core_regulator);
- }
- ov7251->analog_regulator = devm_regulator_get(dev, "vdda");
- if (IS_ERR(ov7251->analog_regulator)) {
- dev_err(dev, "cannot get analog regulator\n");
- return PTR_ERR(ov7251->analog_regulator);
- }
- ov7251->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH);
- if (IS_ERR(ov7251->enable_gpio)) {
- dev_err(dev, "cannot get enable gpio\n");
- return PTR_ERR(ov7251->enable_gpio);
- }
- mutex_init(&ov7251->lock);
- v4l2_ctrl_handler_init(&ov7251->ctrls, 7);
- ov7251->ctrls.lock = &ov7251->lock;
- v4l2_ctrl_new_std(&ov7251->ctrls, &ov7251_ctrl_ops,
- V4L2_CID_HFLIP, 0, 1, 1, 0);
- v4l2_ctrl_new_std(&ov7251->ctrls, &ov7251_ctrl_ops,
- V4L2_CID_VFLIP, 0, 1, 1, 0);
- ov7251->exposure = v4l2_ctrl_new_std(&ov7251->ctrls, &ov7251_ctrl_ops,
- V4L2_CID_EXPOSURE, 1, 32, 1, 32);
- ov7251->gain = v4l2_ctrl_new_std(&ov7251->ctrls, &ov7251_ctrl_ops,
- V4L2_CID_GAIN, 16, 1023, 1, 16);
- v4l2_ctrl_new_std_menu_items(&ov7251->ctrls, &ov7251_ctrl_ops,
- V4L2_CID_TEST_PATTERN,
- ARRAY_SIZE(ov7251_test_pattern_menu) - 1,
- 0, 0, ov7251_test_pattern_menu);
- ov7251->pixel_clock = v4l2_ctrl_new_std(&ov7251->ctrls,
- &ov7251_ctrl_ops,
- V4L2_CID_PIXEL_RATE,
- 1, INT_MAX, 1, 1);
- ov7251->link_freq = v4l2_ctrl_new_int_menu(&ov7251->ctrls,
- &ov7251_ctrl_ops,
- V4L2_CID_LINK_FREQ,
- ARRAY_SIZE(link_freq) - 1,
- 0, link_freq);
- if (ov7251->link_freq)
- ov7251->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
- ov7251->sd.ctrl_handler = &ov7251->ctrls;
- if (ov7251->ctrls.error) {
- dev_err(dev, "%s: control initialization error %d\n",
- __func__, ov7251->ctrls.error);
- ret = ov7251->ctrls.error;
- goto free_ctrl;
- }
- v4l2_i2c_subdev_init(&ov7251->sd, client, &ov7251_subdev_ops);
- ov7251->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
- ov7251->pad.flags = MEDIA_PAD_FL_SOURCE;
- ov7251->sd.dev = &client->dev;
- ov7251->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
- ret = media_entity_pads_init(&ov7251->sd.entity, 1, &ov7251->pad);
- if (ret < 0) {
- dev_err(dev, "could not register media entity\n");
- goto free_ctrl;
- }
- ret = ov7251_s_power(&ov7251->sd, true);
- if (ret < 0) {
- dev_err(dev, "could not power up OV7251\n");
- goto free_entity;
- }
- ret = ov7251_read_reg(ov7251, OV7251_CHIP_ID_HIGH, &chip_id_high);
- if (ret < 0 || chip_id_high != OV7251_CHIP_ID_HIGH_BYTE) {
- dev_err(dev, "could not read ID high\n");
- ret = -ENODEV;
- goto power_down;
- }
- ret = ov7251_read_reg(ov7251, OV7251_CHIP_ID_LOW, &chip_id_low);
- if (ret < 0 || chip_id_low != OV7251_CHIP_ID_LOW_BYTE) {
- dev_err(dev, "could not read ID low\n");
- ret = -ENODEV;
- goto power_down;
- }
- ret = ov7251_read_reg(ov7251, OV7251_SC_GP_IO_IN1, &chip_rev);
- if (ret < 0) {
- dev_err(dev, "could not read revision\n");
- ret = -ENODEV;
- goto power_down;
- }
- chip_rev >>= 4;
- dev_info(dev, "OV7251 revision %x (%s) detected at address 0x%02x\n",
- chip_rev,
- chip_rev == 0x4 ? "1A / 1B" :
- chip_rev == 0x5 ? "1C / 1D" :
- chip_rev == 0x6 ? "1E" :
- chip_rev == 0x7 ? "1F" : "unknown",
- client->addr);
- ret = ov7251_read_reg(ov7251, OV7251_PRE_ISP_00,
- &ov7251->pre_isp_00);
- if (ret < 0) {
- dev_err(dev, "could not read test pattern value\n");
- ret = -ENODEV;
- goto power_down;
- }
- ret = ov7251_read_reg(ov7251, OV7251_TIMING_FORMAT1,
- &ov7251->timing_format1);
- if (ret < 0) {
- dev_err(dev, "could not read vflip value\n");
- ret = -ENODEV;
- goto power_down;
- }
- ret = ov7251_read_reg(ov7251, OV7251_TIMING_FORMAT2,
- &ov7251->timing_format2);
- if (ret < 0) {
- dev_err(dev, "could not read hflip value\n");
- ret = -ENODEV;
- goto power_down;
- }
- ov7251_s_power(&ov7251->sd, false);
- ret = v4l2_async_register_subdev(&ov7251->sd);
- if (ret < 0) {
- dev_err(dev, "could not register v4l2 device\n");
- goto free_entity;
- }
- ov7251_entity_init_cfg(&ov7251->sd, NULL);
- return 0;
- power_down:
- ov7251_s_power(&ov7251->sd, false);
- free_entity:
- media_entity_cleanup(&ov7251->sd.entity);
- free_ctrl:
- v4l2_ctrl_handler_free(&ov7251->ctrls);
- mutex_destroy(&ov7251->lock);
- return ret;
- }
- static int ov7251_remove(struct i2c_client *client)
- {
- struct v4l2_subdev *sd = i2c_get_clientdata(client);
- struct ov7251 *ov7251 = to_ov7251(sd);
- v4l2_async_unregister_subdev(&ov7251->sd);
- media_entity_cleanup(&ov7251->sd.entity);
- v4l2_ctrl_handler_free(&ov7251->ctrls);
- mutex_destroy(&ov7251->lock);
- return 0;
- }
- static const struct of_device_id ov7251_of_match[] = {
- { .compatible = "ovti,ov7251" },
- { /* sentinel */ }
- };
- MODULE_DEVICE_TABLE(of, ov7251_of_match);
- static struct i2c_driver ov7251_i2c_driver = {
- .driver = {
- .of_match_table = ov7251_of_match,
- .name = "ov7251",
- },
- .probe_new = ov7251_probe,
- .remove = ov7251_remove,
- };
- module_i2c_driver(ov7251_i2c_driver);
- MODULE_DESCRIPTION("Omnivision OV7251 Camera Driver");
- MODULE_AUTHOR("Todor Tomov <todor.tomov@linaro.org>");
- MODULE_LICENSE("GPL v2");
|