From patchwork Sat May 9 08:06:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongchun Zhu X-Patchwork-Id: 11538013 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1F7D1139F for ; Sat, 9 May 2020 08:08:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EBED924953 for ; Sat, 9 May 2020 08:08:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="G0SJe1k0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727792AbgEIIIR (ORCPT ); Sat, 9 May 2020 04:08:17 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:9402 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725880AbgEIIIQ (ORCPT ); Sat, 9 May 2020 04:08:16 -0400 X-UUID: 44949196c30a482694782de6ae29126a-20200509 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=roe31CGg8DYHIibcEX4nl2G8cOtLymree2otbQi07ic=; b=G0SJe1k08wBtBn2F9YdPAr1PhmdyQqVfPsZKxWy49kF6vQ6ian9WB+qjfgJrlBBTdfLqZNTSlQsNGLmclRBrd3ugGZofJVo/AQvAAvJJZ435lGGJpZXjTJS6tmlg2fhiYGWXh0iK2eLZNil19URKaUza9bfM7APNPGFgn9s9lgY=; X-UUID: 44949196c30a482694782de6ae29126a-20200509 Received: from mtkexhb02.mediatek.inc [(172.21.101.103)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 146451837; Sat, 09 May 2020 16:08:01 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs05n2.mediatek.inc (172.21.101.140) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sat, 9 May 2020 16:07:58 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Sat, 9 May 2020 16:07:57 +0800 From: Dongchun Zhu To: , , , , , , , , , , CC: , , , , , , , , Subject: [V8, 2/2] media: i2c: ov02a10: Add OV02A10 image sensor driver Date: Sat, 9 May 2020 16:06:27 +0800 Message-ID: <20200509080627.23222-3-dongchun.zhu@mediatek.com> X-Mailer: git-send-email 2.9.2 In-Reply-To: <20200509080627.23222-1-dongchun.zhu@mediatek.com> References: <20200509080627.23222-1-dongchun.zhu@mediatek.com> MIME-Version: 1.0 X-MTK: N Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add a V4L2 sub-device driver for OV02A10 image sensor. Signed-off-by: Dongchun Zhu --- MAINTAINERS | 1 + drivers/media/i2c/Kconfig | 13 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/ov02a10.c | 1094 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 1109 insertions(+) create mode 100644 drivers/media/i2c/ov02a10.c diff --git a/MAINTAINERS b/MAINTAINERS index 63a2335..e7677c5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12395,6 +12395,7 @@ L: linux-media@vger.kernel.org S: Maintained T: git git://linuxtv.org/media_tree.git F: Documentation/devicetree/bindings/media/i2c/ovti,ov02a10.yaml +F: drivers/media/i2c/ov02a10.c OMNIVISION OV13858 SENSOR DRIVER M: Sakari Ailus diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 125d596..d8572cd 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -655,6 +655,19 @@ config VIDEO_IMX355 To compile this driver as a module, choose M here: the module will be called imx355. +config VIDEO_OV02A10 + tristate "OmniVision OV02A10 sensor support" + depends on I2C && VIDEO_V4L2 + select MEDIA_CONTROLLER + select VIDEO_V4L2_SUBDEV_API + select V4L2_FWNODE + help + This is a Video4Linux2 sensor driver for the OmniVision + OV02A10 camera. + + To compile this driver as a module, choose M here: the + module will be called ov02a10. + config VIDEO_OV2640 tristate "OmniVision OV2640 sensor support" depends on VIDEO_V4L2 && I2C diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index 77bf7d0..6566dd9 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -63,6 +63,7 @@ obj-$(CONFIG_VIDEO_VP27SMPX) += vp27smpx.o obj-$(CONFIG_VIDEO_SONY_BTF_MPX) += sony-btf-mpx.o obj-$(CONFIG_VIDEO_UPD64031A) += upd64031a.o obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o +obj-$(CONFIG_VIDEO_OV02A10) += ov02a10.o obj-$(CONFIG_VIDEO_OV2640) += ov2640.o obj-$(CONFIG_VIDEO_OV2680) += ov2680.o obj-$(CONFIG_VIDEO_OV2685) += ov2685.o diff --git a/drivers/media/i2c/ov02a10.c b/drivers/media/i2c/ov02a10.c new file mode 100644 index 0000000..778619e --- /dev/null +++ b/drivers/media/i2c/ov02a10.c @@ -0,0 +1,1094 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2020 MediaTek Inc. + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CHIP_ID 0x2509 +#define OV02A10_REG_CHIP_ID_H 0x02 +#define OV02A10_REG_CHIP_ID_L 0x03 +#define OV02A10_ID(_msb, _lsb) ((_msb) << 8 | (_lsb)) + +/* Bit[1] vertical upside down */ +/* Bit[0] horizontal mirror */ +#define REG_MIRROR_FLIP_CONTROL 0x3f + +/* Orientation */ +#define REG_MIRROR_FLIP_ENABLE 0x03 + +/* Bit[7] clock HS mode enable + * 0: Clock continue + * 1: Clock HS + * Bit[6:2] HS VOD adjust + * Bit[1:0] P VHI adjust + */ +#define REG_HS_MODE_BLC 0x9d + +#define CLOCK_HS_MODE_ENABLE BIT(7) + +/* Bit[2:0] MIPI transmission speed select */ +#define TX_SPEED_AREA_SEL 0xa1 + +#define REG_PAGE_SWITCH 0xfd +#define REG_GLOBAL_EFFECTIVE 0x01 +#define REG_ENABLE BIT(0) + +#define REG_SC_CTRL_MODE 0xac +#define SC_CTRL_MODE_STANDBY 0x00 +#define SC_CTRL_MODE_STREAMING 0x01 + +#define OV02A10_EXP_SHIFT 8 +#define OV02A10_REG_EXPOSURE_H 0x03 +#define OV02A10_REG_EXPOSURE_L 0x04 +#define OV02A10_EXPOSURE_MIN 4 +#define OV02A10_EXPOSURE_MAX_MARGIN 4 +#define OV02A10_EXPOSURE_STEP 1 + +#define OV02A10_VTS_SHIFT 8 +#define OV02A10_REG_VTS_H 0x05 +#define OV02A10_REG_VTS_L 0x06 +#define OV02A10_VTS_MAX 0x209f +#define OV02A10_VTS_MIN 0x04cf +#define OV02A10_BASIC_LINE 1224 + +#define OV02A10_REG_GAIN 0x24 +#define OV02A10_GAIN_MIN 0x10 +#define OV02A10_GAIN_MAX 0xf8 +#define OV02A10_GAIN_STEP 0x01 +#define OV02A10_GAIN_DEFAULT 0x40 + +/* Test pattern control */ +#define OV02A10_REG_TEST_PATTERN 0xb6 +#define OV02A10_TEST_PATTERN_ENABLE BIT(0) + +#define HZ_PER_MHZ 1000000L +#define OV02A10_LINK_FREQ_390MHZ (390 * HZ_PER_MHZ) +#define OV02A10_ECLK_FREQ (24 * HZ_PER_MHZ) +#define OV02A10_DATA_LANES 1 +#define OV02A10_BITS_PER_SAMPLE 10 + +static const char * const ov02a10_supply_names[] = { + "dovdd", /* Digital I/O power */ + "avdd", /* Analog power */ + "dvdd", /* Digital core power */ +}; + +#define OV02A10_NUM_SUPPLIES ARRAY_SIZE(ov02a10_supply_names) + +struct ov02a10_reg { + u8 addr; + u8 val; +}; + +struct ov02a10_reg_list { + u32 num_of_regs; + const struct ov02a10_reg *regs; +}; + +struct ov02a10_mode { + u32 width; + u32 height; + u32 exp_def; + u32 hts_def; + u32 vts_def; + const struct ov02a10_reg_list reg_list; +}; + +struct ov02a10 { + u32 eclk_freq; + u32 mipi_clock_tx_speed; + + struct clk *eclk; + struct gpio_desc *pd_gpio; + struct gpio_desc *n_rst_gpio; + struct regulator_bulk_data supplies[OV02A10_NUM_SUPPLIES]; + + bool streaming; + bool upside_down; + bool mipi_clock_tx_speed_select_enable; + bool mipi_clock_hs_mode_enable; + + /* + * Serialize control access, get/set format, get selection + * and start streaming. + */ + struct mutex mutex; + struct v4l2_subdev subdev; + struct media_pad pad; + struct v4l2_ctrl *anal_gain; + struct v4l2_ctrl *exposure; + struct v4l2_ctrl *hblank; + struct v4l2_ctrl *vblank; + struct v4l2_ctrl *test_pattern; + struct v4l2_mbus_framefmt fmt; + struct v4l2_ctrl_handler ctrl_handler; + + const struct ov02a10_mode *cur_mode; +}; + +static inline struct ov02a10 *to_ov02a10(struct v4l2_subdev *sd) +{ + return container_of(sd, struct ov02a10, subdev); +} + +/* + * eclk 24Mhz + * pclk 39Mhz + * linelength 934(0x3a6) + * framelength 1390(0x56E) + * grabwindow_width 1600 + * grabwindow_height 1200 + * max_framerate 30fps + * mipi_datarate per lane 780Mbps + */ +static const struct ov02a10_reg ov02a10_1600x1200_regs[] = { + {0xfd, 0x01}, + {0xac, 0x00}, + {0xfd, 0x00}, + {0x2f, 0x29}, + {0x34, 0x00}, + {0x35, 0x21}, + {0x30, 0x15}, + {0x33, 0x01}, + {0xfd, 0x01}, + {0x44, 0x00}, + {0x2a, 0x4c}, + {0x2b, 0x1e}, + {0x2c, 0x60}, + {0x25, 0x11}, + {0x03, 0x01}, + {0x04, 0xae}, + {0x09, 0x00}, + {0x0a, 0x02}, + {0x06, 0xa6}, + {0x31, 0x00}, + {0x24, 0x40}, + {0x01, 0x01}, + {0xfb, 0x73}, + {0xfd, 0x01}, + {0x16, 0x04}, + {0x1c, 0x09}, + {0x21, 0x42}, + {0x12, 0x04}, + {0x13, 0x10}, + {0x11, 0x40}, + {0x33, 0x81}, + {0xd0, 0x00}, + {0xd1, 0x01}, + {0xd2, 0x00}, + {0x50, 0x10}, + {0x51, 0x23}, + {0x52, 0x20}, + {0x53, 0x10}, + {0x54, 0x02}, + {0x55, 0x20}, + {0x56, 0x02}, + {0x58, 0x48}, + {0x5d, 0x15}, + {0x5e, 0x05}, + {0x66, 0x66}, + {0x68, 0x68}, + {0x6b, 0x00}, + {0x6c, 0x00}, + {0x6f, 0x40}, + {0x70, 0x40}, + {0x71, 0x0a}, + {0x72, 0xf0}, + {0x73, 0x10}, + {0x75, 0x80}, + {0x76, 0x10}, + {0x84, 0x00}, + {0x85, 0x10}, + {0x86, 0x10}, + {0x87, 0x00}, + {0x8a, 0x22}, + {0x8b, 0x22}, + {0x19, 0xf1}, + {0x29, 0x01}, + {0xfd, 0x01}, + {0x9d, 0x16}, + {0xa0, 0x29}, + {0xa1, 0x04}, + {0xad, 0x62}, + {0xae, 0x00}, + {0xaf, 0x85}, + {0xb1, 0x01}, + {0x8e, 0x06}, + {0x8f, 0x40}, + {0x90, 0x04}, + {0x91, 0xb0}, + {0x45, 0x01}, + {0x46, 0x00}, + {0x47, 0x6c}, + {0x48, 0x03}, + {0x49, 0x8b}, + {0x4a, 0x00}, + {0x4b, 0x07}, + {0x4c, 0x04}, + {0x4d, 0xb7}, + {0xf0, 0x40}, + {0xf1, 0x40}, + {0xf2, 0x40}, + {0xf3, 0x40}, + {0x3f, 0x00}, + {0xfd, 0x01}, + {0x05, 0x00}, + {0x06, 0xa6}, + {0xfd, 0x01}, +}; + +static const char * const ov02a10_test_pattern_menu[] = { + "Disabled", + "Color Bar", +}; + +static const s64 link_freq_menu_items[] = { + OV02A10_LINK_FREQ_390MHZ, +}; + +static u64 to_pixel_rate(u32 f_index) +{ + u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV02A10_DATA_LANES; + + do_div(pixel_rate, OV02A10_BITS_PER_SAMPLE); + + return pixel_rate; +} + +static const struct ov02a10_mode supported_modes[] = { + { + .width = 1600, + .height = 1200, + .exp_def = 0x01ae, + .hts_def = 0x03a6, + .vts_def = 0x056e, + .reg_list = { + .num_of_regs = ARRAY_SIZE(ov02a10_1600x1200_regs), + .regs = ov02a10_1600x1200_regs, + }, + }, +}; + +static int ov02a10_write_array(struct ov02a10 *ov02a10, + const struct ov02a10_reg_list *r_list) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + unsigned int i; + int ret; + + for (i = 0; i < r_list->num_of_regs; i++) { + ret = i2c_smbus_write_byte_data(client, r_list->regs[i].addr, + r_list->regs[i].val); + if (ret < 0) + return ret; + } + + return 0; +} + +static int ov02a10_read_smbus(struct ov02a10 *ov02a10, unsigned char reg, + unsigned char *val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + int ret; + + ret = i2c_smbus_read_byte_data(client, reg); + + if (ret < 0) + return ret; + + *val = (unsigned char)ret; + + return 0; +} + +static int ov02a10_mod_reg(struct ov02a10 *ov02a10, u8 reg, u8 mask, u8 val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + u8 readval; + int ret; + + ret = ov02a10_read_smbus(ov02a10, reg, &readval); + if (ret) + return ret; + + val = (readval & ~mask) | (val & mask); + + return i2c_smbus_write_byte_data(client, reg, val); +} + +static void ov02a10_fill_fmt(const struct ov02a10_mode *mode, + struct v4l2_mbus_framefmt *fmt) +{ + fmt->width = mode->width; + fmt->height = mode->height; + fmt->field = V4L2_FIELD_NONE; +} + +static int ov02a10_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct ov02a10 *ov02a10 = to_ov02a10(sd); + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; + + mutex_lock(&ov02a10->mutex); + + if (ov02a10->streaming) { + mutex_unlock(&ov02a10->mutex); + return -EBUSY; + } + + /* Only one sensor mode supported */ + mbus_fmt->code = ov02a10->fmt.code; + ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt); + ov02a10->fmt = fmt->format; + + mutex_unlock(&ov02a10->mutex); + + return 0; +} + +static int ov02a10_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct ov02a10 *ov02a10 = to_ov02a10(sd); + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; + + mutex_lock(&ov02a10->mutex); + + fmt->format = ov02a10->fmt; + mbus_fmt->code = ov02a10->fmt.code; + ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt); + + mutex_unlock(&ov02a10->mutex); + + return 0; +} + +static int ov02a10_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + struct ov02a10 *ov02a10 = to_ov02a10(sd); + + if (code->index >= ARRAY_SIZE(supported_modes)) + return -EINVAL; + + code->code = ov02a10->fmt.code; + + return 0; +} + +static int ov02a10_enum_frame_sizes(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_size_enum *fse) +{ + if (fse->index >= ARRAY_SIZE(supported_modes)) + return -EINVAL; + + fse->min_width = supported_modes[fse->index].width; + fse->max_width = supported_modes[fse->index].width; + fse->max_height = supported_modes[fse->index].height; + fse->min_height = supported_modes[fse->index].height; + + return 0; +} + +static int ov02a10_check_sensor_id(struct ov02a10 *ov02a10) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + u16 id; + u8 chip_id_h; + u8 chip_id_l; + int ret; + + /* Check sensor revision */ + ret = ov02a10_read_smbus(ov02a10, OV02A10_REG_CHIP_ID_H, &chip_id_h); + if (ret) + return ret; + + ret = ov02a10_read_smbus(ov02a10, OV02A10_REG_CHIP_ID_L, &chip_id_l); + if (ret) + return ret; + + id = OV02A10_ID(chip_id_h, chip_id_l); + if (id != CHIP_ID) { + dev_err(&client->dev, "Unexpected sensor id(%04x)\n", id); + return -EINVAL; + } + + dev_dbg(&client->dev, "Detected OV%04X sensor\n", id); + + return 0; +} + +static int __maybe_unused ov02a10_power_on(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov02a10 *ov02a10 = to_ov02a10(sd); + int ret; + + gpiod_set_value_cansleep(ov02a10->n_rst_gpio, 0); + gpiod_set_value_cansleep(ov02a10->pd_gpio, 0); + + ret = clk_prepare_enable(ov02a10->eclk); + if (ret < 0) { + dev_err(dev, "failed to enable eclk\n"); + return ret; + } + + ret = regulator_bulk_enable(OV02A10_NUM_SUPPLIES, ov02a10->supplies); + if (ret < 0) { + dev_err(dev, "failed to enable regulators\n"); + goto disable_clk; + } + usleep_range(5000, 6000); + + gpiod_set_value_cansleep(ov02a10->pd_gpio, 1); + usleep_range(5000, 6000); + + gpiod_set_value_cansleep(ov02a10->n_rst_gpio, 1); + usleep_range(5000, 6000); + + ret = ov02a10_check_sensor_id(ov02a10); + if (ret) + goto disable_regulator; + + return 0; + +disable_regulator: + regulator_bulk_disable(OV02A10_NUM_SUPPLIES, ov02a10->supplies); +disable_clk: + clk_disable_unprepare(ov02a10->eclk); + + return ret; +} + +static int __maybe_unused ov02a10_power_off(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov02a10 *ov02a10 = to_ov02a10(sd); + + gpiod_set_value_cansleep(ov02a10->n_rst_gpio, 0); + clk_disable_unprepare(ov02a10->eclk); + gpiod_set_value_cansleep(ov02a10->pd_gpio, 0); + regulator_bulk_disable(OV02A10_NUM_SUPPLIES, ov02a10->supplies); + + return 0; +} + +static int __ov02a10_start_stream(struct ov02a10 *ov02a10) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + const struct ov02a10_reg_list *reg_list; + int ret; + + /* Apply default values of current mode */ + reg_list = &ov02a10->cur_mode->reg_list; + ret = ov02a10_write_array(ov02a10, reg_list); + if (ret) + return ret; + + /* Apply customized values from user */ + ret = __v4l2_ctrl_handler_setup(ov02a10->subdev.ctrl_handler); + if (ret) + return ret; + + /* Set orientation to 180 degree */ + if (ov02a10->upside_down) { + ret = i2c_smbus_write_byte_data(client, REG_MIRROR_FLIP_CONTROL, + REG_MIRROR_FLIP_ENABLE); + if (ret) { + dev_err(&client->dev, "failed to set orientation\n"); + return ret; + } + ret = i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE, + REG_ENABLE); + if (ret < 0) + return ret; + } + + /* Set clock lane transmission mode according to DT property */ + ret = ov02a10_mod_reg(ov02a10, REG_HS_MODE_BLC, CLOCK_HS_MODE_ENABLE, + ov02a10->mipi_clock_hs_mode_enable ? + CLOCK_HS_MODE_ENABLE : 0); + if (ret < 0) + return ret; + + /* Set mipi TX speed according to DT property */ + if (ov02a10->mipi_clock_tx_speed_select_enable) { + ret = i2c_smbus_write_byte_data(client, TX_SPEED_AREA_SEL, + ov02a10->mipi_clock_tx_speed); + if (ret < 0) + return ret; + } + + /* Set stream on register */ + return i2c_smbus_write_byte_data(client, REG_SC_CTRL_MODE, + SC_CTRL_MODE_STREAMING); +} + +static int __ov02a10_stop_stream(struct ov02a10 *ov02a10) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + + return i2c_smbus_write_byte_data(client, REG_SC_CTRL_MODE, + SC_CTRL_MODE_STANDBY); +} + +static int ov02a10_entity_init_cfg(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg) +{ + struct v4l2_subdev_format fmt = { + .which = cfg ? V4L2_SUBDEV_FORMAT_TRY + : V4L2_SUBDEV_FORMAT_ACTIVE, + .format = { + .width = 1600, + .height = 1200, + } + }; + + ov02a10_set_fmt(sd, cfg, &fmt); + + return 0; +} + +static int ov02a10_s_stream(struct v4l2_subdev *sd, int on) +{ + struct ov02a10 *ov02a10 = to_ov02a10(sd); + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + int ret; + + dev_dbg(&client->dev, "ov02a10 s_stream (%d)\n", on); + mutex_lock(&ov02a10->mutex); + + if (ov02a10->streaming == on) + goto unlock_and_return; + + if (on) { + ret = pm_runtime_get_sync(&client->dev); + if (ret < 0) { + pm_runtime_put_noidle(&client->dev); + goto unlock_and_return; + } + + ret = __ov02a10_start_stream(ov02a10); + if (ret) { + __ov02a10_stop_stream(ov02a10); + ov02a10->streaming = !on; + goto err_rpm_put; + } + } else { + __ov02a10_stop_stream(ov02a10); + pm_runtime_put(&client->dev); + } + + ov02a10->streaming = on; + mutex_unlock(&ov02a10->mutex); + + return 0; + +err_rpm_put: + pm_runtime_put(&client->dev); +unlock_and_return: + mutex_unlock(&ov02a10->mutex); + + return ret; +} + +static const struct dev_pm_ops ov02a10_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) + SET_RUNTIME_PM_OPS(ov02a10_power_off, ov02a10_power_on, NULL) +}; + +/* + * ov02a10_set_exposure - Function called when setting exposure time + * @priv: Pointer to device structure + * @val: Variable for exposure time, in the unit of micro-second + * + * Set exposure time based on input value. + * + * Return: 0 on success + */ +static int ov02a10_set_exposure(struct ov02a10 *ov02a10, int val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + int ret; + + ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_byte_data(client, OV02A10_REG_EXPOSURE_H, + val >> OV02A10_EXP_SHIFT); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_byte_data(client, OV02A10_REG_EXPOSURE_L, val); + if (ret < 0) + return ret; + + return i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE, + REG_ENABLE); +} + +static int ov02a10_set_gain(struct ov02a10 *ov02a10, int val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + int ret; + + ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_byte_data(client, OV02A10_REG_GAIN, val); + if (ret < 0) + return ret; + + return i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE, + REG_ENABLE); +} + +static int ov02a10_set_vblank(struct ov02a10 *ov02a10, int val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + u32 vts = val + ov02a10->cur_mode->height - OV02A10_BASIC_LINE; + int ret; + + ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_byte_data(client, OV02A10_REG_VTS_H, + vts >> OV02A10_VTS_SHIFT); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_byte_data(client, OV02A10_REG_VTS_L, vts); + if (ret < 0) + return ret; + + return i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE, + REG_ENABLE); +} + +static int ov02a10_set_test_pattern(struct ov02a10 *ov02a10, int pattern) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + int ret; + + if (pattern) + pattern = OV02A10_TEST_PATTERN_ENABLE; + + ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_byte_data(client, OV02A10_REG_TEST_PATTERN, + pattern); + if (ret < 0) + return ret; + + ret = i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE, + REG_ENABLE); + if (ret < 0) + return ret; + + return i2c_smbus_write_byte_data(client, REG_SC_CTRL_MODE, + SC_CTRL_MODE_STREAMING); +} + +static int ov02a10_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct ov02a10 *ov02a10 = container_of(ctrl->handler, + struct ov02a10, ctrl_handler); + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + s64 max_expo; + int ret; + + /* Propagate change of current control to all related controls */ + if (ctrl->id == V4L2_CID_VBLANK) { + /* Update max exposure while meeting expected vblanking */ + max_expo = ov02a10->cur_mode->height + ctrl->val - + OV02A10_EXPOSURE_MAX_MARGIN; + __v4l2_ctrl_modify_range(ov02a10->exposure, + ov02a10->exposure->minimum, max_expo, + ov02a10->exposure->step, + ov02a10->exposure->default_value); + } + + /* V4L2 controls values will be applied only when power is already up */ + if (!pm_runtime_get_if_in_use(&client->dev)) + return 0; + + switch (ctrl->id) { + case V4L2_CID_EXPOSURE: + ret = ov02a10_set_exposure(ov02a10, ctrl->val); + break; + case V4L2_CID_ANALOGUE_GAIN: + ret = ov02a10_set_gain(ov02a10, ctrl->val); + break; + case V4L2_CID_VBLANK: + ret = ov02a10_set_vblank(ov02a10, ctrl->val); + break; + case V4L2_CID_TEST_PATTERN: + ret = ov02a10_set_test_pattern(ov02a10, ctrl->val); + break; + default: + ret = -EINVAL; + break; + }; + + pm_runtime_put(&client->dev); + + return ret; +} + +static const struct v4l2_subdev_video_ops ov02a10_video_ops = { + .s_stream = ov02a10_s_stream, +}; + +static const struct v4l2_subdev_pad_ops ov02a10_pad_ops = { + .init_cfg = ov02a10_entity_init_cfg, + .enum_mbus_code = ov02a10_enum_mbus_code, + .enum_frame_size = ov02a10_enum_frame_sizes, + .get_fmt = ov02a10_get_fmt, + .set_fmt = ov02a10_set_fmt, +}; + +static const struct v4l2_subdev_ops ov02a10_subdev_ops = { + .video = &ov02a10_video_ops, + .pad = &ov02a10_pad_ops, +}; + +static const struct media_entity_operations ov02a10_subdev_entity_ops = { + .link_validate = v4l2_subdev_link_validate, +}; + +static const struct v4l2_ctrl_ops ov02a10_ctrl_ops = { + .s_ctrl = ov02a10_set_ctrl, +}; + +static int ov02a10_initialize_controls(struct ov02a10 *ov02a10) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + const struct ov02a10_mode *mode; + struct v4l2_ctrl_handler *handler; + struct v4l2_ctrl *ctrl; + u64 exposure_max; + u32 pixel_rate, h_blank; + int ret; + + handler = &ov02a10->ctrl_handler; + mode = ov02a10->cur_mode; + ret = v4l2_ctrl_handler_init(handler, 7); + if (ret) + return ret; + + handler->lock = &ov02a10->mutex; + + ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ, 0, 0, + link_freq_menu_items); + if (ctrl) + ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + pixel_rate = to_pixel_rate(0); + v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE, 0, pixel_rate, 1, + pixel_rate); + + h_blank = mode->hts_def - mode->width; + ov02a10->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK, + h_blank, h_blank, 1, h_blank); + if (ov02a10->hblank) + ov02a10->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + ov02a10->vblank = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, + V4L2_CID_VBLANK, mode->vts_def - + mode->height, + OV02A10_VTS_MAX - mode->height, 1, + mode->vts_def - mode->height); + + exposure_max = mode->vts_def - 4; + ov02a10->exposure = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, + V4L2_CID_EXPOSURE, + OV02A10_EXPOSURE_MIN, + exposure_max, + OV02A10_EXPOSURE_STEP, + mode->exp_def); + + ov02a10->anal_gain = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, + V4L2_CID_ANALOGUE_GAIN, + OV02A10_GAIN_MIN, + OV02A10_GAIN_MAX, + OV02A10_GAIN_STEP, + OV02A10_GAIN_DEFAULT); + + ov02a10->test_pattern = + v4l2_ctrl_new_std_menu_items(handler, &ov02a10_ctrl_ops, + V4L2_CID_TEST_PATTERN, + ARRAY_SIZE(ov02a10_test_pattern_menu) - + 1, 0, 0, + ov02a10_test_pattern_menu); + + if (handler->error) { + ret = handler->error; + dev_err(&client->dev, "failed to init controls(%d)\n", ret); + goto err_free_handler; + } + + ov02a10->subdev.ctrl_handler = handler; + + return 0; + +err_free_handler: + v4l2_ctrl_handler_free(handler); + + return ret; +} + +static int ov02a10_check_hwcfg(struct device *dev, struct ov02a10 *ov02a10) +{ + struct fwnode_handle *ep; + struct fwnode_handle *fwnode = dev_fwnode(dev); + struct v4l2_fwnode_endpoint bus_cfg = { + .bus_type = V4L2_MBUS_CSI2_DPHY, + }; + unsigned int i, j; + int ret; + + if (!fwnode) + return -EINVAL; + + ep = fwnode_graph_get_next_endpoint(fwnode, NULL); + if (!ep) + return -ENXIO; + + ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); + fwnode_handle_put(ep); + if (ret) + return ret; + + /* Optional indication of mipi clock lane mode */ + if (bus_cfg.bus.mipi_csi2.flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK) + ov02a10->mipi_clock_hs_mode_enable = true; + + if (!bus_cfg.nr_of_link_frequencies) { + dev_err(dev, "no link frequencies defined"); + ret = -EINVAL; + goto check_hwcfg_error; + } + + for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) { + for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) { + if (link_freq_menu_items[i] == + bus_cfg.link_frequencies[j]) + break; + } + + if (j == bus_cfg.nr_of_link_frequencies) { + dev_err(dev, "no link frequency %lld supported", + link_freq_menu_items[i]); + ret = -EINVAL; + goto check_hwcfg_error; + } + } + +check_hwcfg_error: + v4l2_fwnode_endpoint_free(&bus_cfg); + + return ret; +} + +static int ov02a10_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct ov02a10 *ov02a10; + unsigned int rotation; + unsigned int clock_lane_tx_speed; + unsigned int i; + int ret; + + ov02a10 = devm_kzalloc(dev, sizeof(*ov02a10), GFP_KERNEL); + if (!ov02a10) + return -ENOMEM; + + ret = ov02a10_check_hwcfg(dev, ov02a10); + if (ret) { + dev_err(dev, "failed to check HW configuration: %d", ret); + return ret; + } + + v4l2_i2c_subdev_init(&ov02a10->subdev, client, &ov02a10_subdev_ops); + ov02a10->upside_down = false; + ov02a10->mipi_clock_tx_speed_select_enable = false; + ov02a10->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10; + + /* Optional indication of physical rotation of sensor */ + ret = fwnode_property_read_u32(dev_fwnode(dev), "rotation", &rotation); + if (!ret) { + if (rotation == 180) { + ov02a10->upside_down = true; + ov02a10->fmt.code = MEDIA_BUS_FMT_SRGGB10_1X10; + } + } + + /* Optional indication of mipi TX speed */ + ret = fwnode_property_read_u32(dev_fwnode(dev), "ovti,mipi-tx-speed", + &clock_lane_tx_speed); + + if (!ret) { + ov02a10->mipi_clock_tx_speed_select_enable = true; + ov02a10->mipi_clock_tx_speed = clock_lane_tx_speed; + } + + /* Get system clock (eclk) */ + ov02a10->eclk = devm_clk_get(dev, "eclk"); + if (IS_ERR(ov02a10->eclk)) { + ret = PTR_ERR(ov02a10->eclk); + dev_err(dev, "failed to get eclk %d\n", ret); + return ret; + } + + ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency", + &ov02a10->eclk_freq); + if (ret) { + dev_err(dev, "failed to get eclk frequency\n"); + return ret; + } + + ret = clk_set_rate(ov02a10->eclk, ov02a10->eclk_freq); + if (ret) { + dev_err(dev, "failed to set eclk frequency (24MHz)\n"); + return ret; + } + + if (clk_get_rate(ov02a10->eclk) != OV02A10_ECLK_FREQ) { + dev_warn(dev, "wrong eclk frequency %d Hz, expected: %d Hz\n", + ov02a10->eclk_freq, OV02A10_ECLK_FREQ); + return -EINVAL; + } + + ov02a10->pd_gpio = devm_gpiod_get(dev, "powerdown", GPIOD_OUT_HIGH); + if (IS_ERR(ov02a10->pd_gpio)) { + ret = PTR_ERR(ov02a10->pd_gpio); + dev_err(dev, "failed to get powerdown-gpios %d\n", ret); + return ret; + } + + ov02a10->n_rst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(ov02a10->n_rst_gpio)) { + ret = PTR_ERR(ov02a10->n_rst_gpio); + dev_err(dev, "failed to get reset-gpios %d\n", ret); + return ret; + } + + for (i = 0; i < OV02A10_NUM_SUPPLIES; i++) + ov02a10->supplies[i].supply = ov02a10_supply_names[i]; + + ret = devm_regulator_bulk_get(dev, OV02A10_NUM_SUPPLIES, + ov02a10->supplies); + if (ret) { + dev_err(dev, "failed to get regulators\n"); + return ret; + } + + mutex_init(&ov02a10->mutex); + ov02a10->cur_mode = &supported_modes[0]; + ret = ov02a10_initialize_controls(ov02a10); + if (ret) { + dev_err(dev, "failed to initialize controls\n"); + goto err_destroy_mutex; + } + + ov02a10->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + ov02a10->subdev.entity.ops = &ov02a10_subdev_entity_ops; + ov02a10->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR; + ov02a10->pad.flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_pads_init(&ov02a10->subdev.entity, 1, &ov02a10->pad); + if (ret < 0) { + dev_err(dev, "failed to init entity pads: %d", ret); + goto err_free_handler; + } + + pm_runtime_enable(dev); + if (!pm_runtime_enabled(dev)) { + ret = ov02a10_power_on(dev); + if (ret < 0) { + dev_err(dev, "failed to power on: %d\n", ret); + goto err_clean_entity; + } + } + + ret = v4l2_async_register_subdev(&ov02a10->subdev); + if (ret) { + dev_err(dev, "failed to register V4L2 subdev: %d", ret); + goto err_clean_entity; + } + + return 0; + +err_clean_entity: + media_entity_cleanup(&ov02a10->subdev.entity); +err_free_handler: + v4l2_ctrl_handler_free(ov02a10->subdev.ctrl_handler); +err_destroy_mutex: + mutex_destroy(&ov02a10->mutex); + + return ret; +} + +static int ov02a10_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov02a10 *ov02a10 = to_ov02a10(sd); + + v4l2_async_unregister_subdev(sd); + media_entity_cleanup(&sd->entity); + v4l2_ctrl_handler_free(sd->ctrl_handler); + pm_runtime_disable(&client->dev); + if (!pm_runtime_status_suspended(&client->dev)) + ov02a10_power_off(&client->dev); + pm_runtime_set_suspended(&client->dev); + mutex_destroy(&ov02a10->mutex); + + return 0; +} + +static const struct of_device_id ov02a10_of_match[] = { + { .compatible = "ovti,ov02a10" }, + {} +}; +MODULE_DEVICE_TABLE(of, ov02a10_of_match); + +static struct i2c_driver ov02a10_i2c_driver = { + .driver = { + .name = "ov02a10", + .pm = &ov02a10_pm_ops, + .of_match_table = ov02a10_of_match, + }, + .probe_new = &ov02a10_probe, + .remove = &ov02a10_remove, +}; + +module_i2c_driver(ov02a10_i2c_driver); + +MODULE_AUTHOR("Dongchun Zhu "); +MODULE_DESCRIPTION("OmniVision OV02A10 sensor driver"); +MODULE_LICENSE("GPL v2"); +