From patchwork Thu Sep 5 22:53:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 825749 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 993421B12CD; Thu, 5 Sep 2024 22:53:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725576813; cv=none; b=f9mW9CXC56+HU6rCQJzgm10bfeO/3VZctLr6mQM8z60hnAL9YPLbdXt7TsNT9kt2lkNCGbDFNBODj9E3HYSjNs0j2YhD3FLJ3H7X0/qjk57UuTKSY2xTF8Ct57TDvd1DnjcgSxUN2T7RF9T2Kwll1LZA8F8Zcm8eIqUOwuDpnrE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725576813; c=relaxed/simple; bh=k+yKoKldHKcAKCqk2qswLRo5AucHDhxyId7IGr6zF24=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=LqyGIt9IfoeUGiQvyDMWck6j/JlH1RXfaWOhwChz7G98HKugOFEbq0/v/vd8SHbv+MbBmLuONdIEHnj57jLrBOXuSiSy/hUyGrhwq9Y/trFeXknXtpdi4dg8auXufjh7NFHlWYqO7+RELzcGO+aekGvMIgpCorPenpNPt3Y2mCs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=k4otQwwr; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="k4otQwwr" Received: from pendragon.ideasonboard.com (81-175-209-231.bb.dnainternet.fi [81.175.209.231]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id E5E2EFEF; Fri, 6 Sep 2024 00:52:03 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1725576725; bh=k+yKoKldHKcAKCqk2qswLRo5AucHDhxyId7IGr6zF24=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k4otQwwr/bdH8nUNlenhqWDpcQ0lPP2ZOtycbCz3AXDCnpopHbtqgr2Env34wCM6w slLQa4btJsZjmw3DQaIscmRSHdWxeoCt222Ry8hSyIP9XFflyCBYQffQNP+LU78+8n YrIfcp4HE0F8/gx7kx76+HWIN4zKSLd1PH5l1hbo= From: Laurent Pinchart To: linux-media@vger.kernel.org, devicetree@vger.kernel.org Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sakari Ailus , Hans Verkuil , Dave Stevenson Subject: [PATCH/RFC v2 2/9] media: i2c: Add a driver for the onsemi AR0144 camera sensor Date: Fri, 6 Sep 2024 01:53:00 +0300 Message-ID: <20240905225308.11267-3-laurent.pinchart@ideasonboard.com> X-Mailer: git-send-email 2.44.2 In-Reply-To: <20240905225308.11267-1-laurent.pinchart@ideasonboard.com> References: <20240905225308.11267-1-laurent.pinchart@ideasonboard.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The AR0144 is a 1/4" 1MP CMOS camera sensor from onsemi. The driver supports both the monochrome and color versions, and both the parallel and MIPI CSI-2 interfaces. Due to limitations of the test platform, only the CSI-2 output has been tested. The driver supports 8-, 10- and 12-bit output formats, analog crop and skipping. It exposes controls that cover the usual use cases for camera sensors. Signed-off-by: Laurent Pinchart --- Changes since v1: - Add binning support to todo list - Support AT version in chip ID check - Fix operator precedence when configuring MIPI clock - Grab LINK_FREQ control during streaming - Rename vdd_io supply to vddio - Fix reset_bits when stopping streaming --- MAINTAINERS | 1 + drivers/media/i2c/Kconfig | 11 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/ar0144.c | 1842 ++++++++++++++++++++++++++++++++++++ 4 files changed, 1855 insertions(+) create mode 100644 drivers/media/i2c/ar0144.c diff --git a/MAINTAINERS b/MAINTAINERS index 93f758624830..919d4f5675bf 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1655,6 +1655,7 @@ M: Laurent Pinchart L: linux-media@vger.kernel.org S: Maintained F: Documentation/devicetree/bindings/media/i2c/onnn,ar0144.yaml +F: drivers/media/i2c/ar0144.c AR0521 ON SEMICONDUCTOR CAMERA SENSOR DRIVER M: Krzysztof Hałasa diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index d149e4e31660..62746f83891a 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -51,6 +51,17 @@ config VIDEO_ALVIUM_CSI2 To compile this driver as a module, choose M here: the module will be called alvium-csi2. +config VIDEO_AR0144 + tristate "onsemi AR0144 sensor support" + select V4L2_CCI_I2C + select VIDEO_CCS_PLL + help + This is a Video4Linux2 sensor driver for the onsemi AR0144 camera + sensor. + + To compile this driver as a module, choose M here: the + module will be called ar0144. + config VIDEO_AR0521 tristate "ON Semiconductor AR0521 sensor support" help diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index 6e5bc08ae874..71507863f770 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_VIDEO_AK7375) += ak7375.o obj-$(CONFIG_VIDEO_AK881X) += ak881x.o obj-$(CONFIG_VIDEO_ALVIUM_CSI2) += alvium-csi2.o obj-$(CONFIG_VIDEO_APTINA_PLL) += aptina-pll.o +obj-$(CONFIG_VIDEO_AR0144) += ar0144.o obj-$(CONFIG_VIDEO_AR0521) += ar0521.o obj-$(CONFIG_VIDEO_BT819) += bt819.o obj-$(CONFIG_VIDEO_BT856) += bt856.o diff --git a/drivers/media/i2c/ar0144.c b/drivers/media/i2c/ar0144.c new file mode 100644 index 000000000000..f9224fd2bb9f --- /dev/null +++ b/drivers/media/i2c/ar0144.c @@ -0,0 +1,1842 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2024 Ideas on Board Oy + * Author: Laurent Pinchart + */ + +/* + * Possible improvements: + * + * - Use grouped parameter hold to update controls atomically + * - Expose debug information through debugfs (FRAME_COUNT, FRAME_STATUS, ...) + * - Make MIPI D-PHY timings configurable + * - Support the parallel interface + * - Expose additional controls (in particular the temperature sensor and the + * on-chip black level correction) + * - Make binning configurable + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include "ccs-pll.h" + +#define AR0144_CHIP_VERSION_REG CCI_REG16(0x3000) +#define AR0144_CHIP_VERSION_CS 0x0356 +#define AR0144_CHIP_VERSION_AT 0x1356 +#define AR0144_Y_ADDR_START CCI_REG16(0x3002) +#define AR0144_X_ADDR_START CCI_REG16(0x3004) +#define AR0144_Y_ADDR_END CCI_REG16(0x3006) +#define AR0144_X_ADDR_END CCI_REG16(0x3008) +#define AR0144_FRAME_LENGTH_LINES CCI_REG16(0x300a) +#define AR0144_MIN_FRAME_LENGTH_LINES 29 +#define AR0144_MAX_FRAME_LENGTH_LINES 65535 +#define AR0144_LINE_LENGTH_PCK CCI_REG16(0x300c) +#define AR0144_MIN_LINE_LENGTH_PCK 1488 +#define AR0144_MAX_LINE_LENGTH_PCK 65534 +#define AR0144_REVISION_NUMBER CCI_REG16(0x300e) +#define AR0144_REVISION_NUMBER_CREV(n) (((n) >> 12) & 0xf) +#define AR0144_REVISION_NUMBER_SILICON(n) (((n) >> 4) & 0xf) +#define AR0144_REVISION_NUMBER_OTPM(n) (((n) >> 0) & 0xf) +#define AR0144_LOCK_CONTROL CCI_REG16(0x3010) +#define AR0144_LOCK_CONTROL_VALUE 0xbeef +#define AR0144_COARSE_INTEGRATION_TIME CCI_REG16(0x3012) +#define AR0144_FINE_INTEGRATION_TIME CCI_REG16(0x3014) +#define AR0144_COARSE_INTEGRATION_TIME_CB CCI_REG16(0x3016) +#define AR0144_FINE_INTEGRATION_TIME_CB CCI_REG16(0x3018) +#define AR0144_RESET_REGISTER CCI_REG16(0x301a) +#define AR0144_GROUPED_PARAMETER_HOLD BIT(15) +#define AR0144_SMIA_SERIALIZER_DIS BIT(12) +#define AR0144_FORCED_PLL_ON BIT(11) +#define AR0144_RESTART_BAD BIT(10) +#define AR0144_MASK_BAD BIT(9) +#define AR0144_GPI_EN BIT(8) +#define AR0144_PARALLEL_EN BIT(7) +#define AR0144_DRIVE_PINS BIT(6) +#define AR0144_LOCK_REG BIT(3) +#define AR0144_STREAM BIT(2) +#define AR0144_RESTART BIT(1) +#define AR0144_RESET BIT(0) +#define AR0144_MODE_SELECT CCI_REG8(0x301c) +#define AR0144_MODE_STREAM BIT(0) +#define AR0144_IMAGE_ORIENTATION CCI_REG8(0x301d) +#define AR0144_ORIENTATION_VERT_FLIP BIT(1) +#define AR0144_ORIENTATION_HORIZ_MIRROR BIT(0) +#define AR0144_DATA_PEDESTAL CCI_REG16(0x301e) +#define AR0144_SOFTWARE_RESET CCI_REG8(0x3021) +#define AR0144_GROUPED_PARAMETER_HOLD_ CCI_REG8(0x3022) +#define AR0144_MASK_CORRUPTED_FRAMES CCI_REG8(0x3023) +#define AR0144_PIXEL_ORDER CCI_REG8(0x3024) +#define AR0144_GPI_STATUS CCI_REG16(0x3026) +#define AR0144_TRIGGER BIT(2) +#define AR0144_OUTPUT_ENABLE_N BIT(1) +#define AR0144_SADDR BIT(0) +#define AR0144_ROW_SPEED CCI_REG16(0x3028) +#define AR0144_ROW_SPEED_HALF_CLK BIT(4) +#define AR0144_VT_PIX_CLK_DIV CCI_REG16(0x302a) +#define AR0144_VT_SYS_CLK_DIV CCI_REG16(0x302c) +#define AR0144_PRE_PLL_CLK_DIV CCI_REG16(0x302e) +#define AR0144_PLL_MULTIPLIER CCI_REG16(0x3030) +#define AR0144_CTX_CONTROL_REG CCI_REG16(0x3034) +#define AR0144_OP_PIX_CLK_DIV CCI_REG16(0x3036) +#define AR0144_OP_SYS_CLK_DIV CCI_REG16(0x3038) +#define AR0144_FRAME_COUNT CCI_REG16(0x303a) +#define AR0144_FRAME_STATUS CCI_REG16(0x303c) +#define AR0144_PLL_LOCKED BIT(3) +#define AR0144_FRAME_START_DURING_GPH BIT(2) +#define AR0144_STANDBY_STATUS BIT(1) +#define AR0144_FRAMESYNC BIT(0) +#define AR0144_LINE_LENGTH_PCK_CB CCI_REG16(0x303e) +#define AR0144_READ_MODE CCI_REG16(0x3040) +#define AR0144_VERT_FLIP BIT(15) +#define AR0144_HORIZ_MIRROR BIT(14) +#define AR0144_READ_MODE_COL_BIN BIT(13) +#define AR0144_READ_MODE_ROW_BIN BIT(12) +#define AR0144_READ_MODE_COL_BIN_CB BIT(11) +#define AR0144_READ_MODE_ROW_BIN_CB BIT(10) +#define AR0144_READ_MODE_COL_SF_BIN_EN BIT(9) +#define AR0144_READ_MODE_COL_SF_BIN_EN_CB BIT(8) +#define AR0144_READ_MODE_COL_SF_BIN_MONO_EN BIT(7) +#define AR0144_READ_MODE_COL_SF_BIN_MONO_EN_CB BIT(6) +#define AR0144_READ_MODE_COL_SUM BIT(5) +#define AR0144_EXTRA_DELAY CCI_REG16(0x3042) +#define AR0144_GREEN1_GAIN CCI_REG16(0x3056) +#define AR0144_BLUE_GAIN CCI_REG16(0x3058) +#define AR0144_RED_GAIN CCI_REG16(0x305a) +#define AR0144_GREEN2_GAIN CCI_REG16(0x305c) +#define AR0144_GLOBAL_GAIN CCI_REG16(0x305e) +#define AR0144_ANALOG_GAIN CCI_REG16(0x3060) +#define AR0144_COARSE_GAIN_CB(n) ((n) << 12) +#define AR0144_FINE_GAIN_CB(n) ((n) << 8) +#define AR0144_COARSE_GAIN(n) ((n) << 4) +#define AR0144_FINE_GAIN(n) ((n) << 0) +#define AR0144_SMIA_TEST CCI_REG16(0x3064) +#define AR0144_EMBEDDED_DATA BIT(8) +#define AR0144_STATS_EN BIT(7) +#define AR0144_CTX_WR_DATA_REG CCI_REG16(0x3066) +#define AR0144_CTX_RD_DATA_REG CCI_REG16(0x3068) +#define AR0144_DATAPATH_SELECT CCI_REG16(0x306e) +#define AR0144_SLEW_RATE_CTRL_PARALLEL(n) (((n) & 7) << 13) +#define AR0144_SLEW_RATE_CTRL_PARALLEL_MASK GENMASK(15, 13) +#define AR0144_SLEW_RATE_CTRL_PIXCLK(n) (((n) & 7) << 10) +#define AR0144_SLOW_RATE_CTRL_PIXCLK_MASK GENMASK(12, 10) +#define AR0144_SPECIAL_LINE_VALID_NORMAL (0U << 0) +#define AR0144_SPECIAL_LINE_VALID_CONTINUOUS (1U << 0) +#define AR0144_SPECIAL_LINE_VALID_CONTINUOUS_XOR (2U << 0) +#define AR0144_TEST_PATTERN_MODE CCI_REG16(0x3070) +#define AR0144_TEST_PATTERN_NONE 0 +#define AR0144_TEST_PATTERN_SOLID 1 +#define AR0144_TEST_PATTERN_BARS 2 +#define AR0144_TEST_PATTERN_BARS_FADE 3 +#define AR0144_TEST_PATTERN_WALKING_1S 256 +#define AR0144_TEST_DATA_RED CCI_REG16(0x3072) +#define AR0144_TEST_DATA_GREENR CCI_REG16(0x3074) +#define AR0144_TEST_DATA_BLUE CCI_REG16(0x3076) +#define AR0144_TEST_DATA_GREENB CCI_REG16(0x3078) +#define AR0144_OPERATION_MODE_CTRL CCI_REG16(0x3082) +#define AR0144_OPERATION_MODE_CTRL_CB CCI_REG16(0x3084) +#define AR0144_SEQ_DATA_PORT CCI_REG16(0x3086) +#define AR0144_SEQ_CTRL_PORT CCI_REG16(0x3088) +#define AR0144_SEQUENCER_STOPPED BIT(15) +#define AR0144_AUTO_INC_ON_READ BIT(14) +#define AR0144_ACCESS_ADDRESS(n) ((n) & 0x3ff) +#define AR0144_X_ADDR_START_CB CCI_REG16(0x308a) +#define AR0144_Y_ADDR_START_CB CCI_REG16(0x308c) +#define AR0144_X_ADDR_END_CB CCI_REG16(0x308e) +#define AR0144_Y_ADDR_END_CB CCI_REG16(0x3090) +#define AR0144_X_EVEN_INC CCI_REG16(0x30a0) +#define AR0144_X_ODD_INC CCI_REG16(0x30a2) +#define AR0144_X_ODD_INC_SKIP(n) (((n) << 1) - 1) +#define AR0144_Y_EVEN_INC CCI_REG16(0x30a4) +#define AR0144_Y_ODD_INC CCI_REG16(0x30a6) +#define AR0144_Y_ODD_INC_SKIP(n) (((n) << 1) - 1) +#define AR0144_Y_ODD_INC_CB CCI_REG16(0x30a8) +#define AR0144_FRAME_LINE_LENGTH_CB CCI_REG16(0x30aa) +#define AR0144_X_ODD_INC_CB CCI_REG16(0x30ae) +#define AR0144_DIGITAL_TEST CCI_REG16(0x30b0) +#define AR0144_PLL_COMPLETE_BYPASS BIT(14) +#define AR0144_PIXCLK_ON BIT(8) +#define AR0144_MONO_CHROME_OPERATION BIT(7) +#define AR0144_TEMPSENS_DATA_REG CCI_REG16(0x30b2) +#define AR0144_TEMPSENS_CTRL_REG CCI_REG16(0x30b4) +#define AR0144_RETRIGGER_THRESHOLD(n) ((n) << 6) +#define AR0144_RETRIGGER_THRESHOLD_MASK GENMASK(15, 6) +#define AR0144_TEMP_CLEAR_VALUE BIT(5) +#define AR0144_TEMP_START_CONVERSION BIT(4) +#define AR0144_TEMPSENS_POWER_ON BIT(0) +#define AR0144_GREEN1_GAIN_CB CCI_REG16(0x30bc) +#define AR0144_BLUE_GAIN_CB CCI_REG16(0x30be) +#define AR0144_RED_GAIN_CB CCI_REG16(0x30c0) +#define AR0144_GREEN2_GAIN_CB CCI_REG16(0x30c2) +#define AR0144_GLOBAL_GAIN_CB CCI_REG16(0x30c4) +#define AR0144_TEMPSENS_CALIB1 CCI_REG16(0x30c6) +#define AR0144_TEMPSENS_CALIB2 CCI_REG16(0x30c8) +#define AR0144_GRR_CONTROL1 CCI_REG16(0x30ce) +#define AR0144_NOISE_PEDESTAL CCI_REG16(0x30fe) +#define AR0144_AECTRLREG CCI_REG16(0x3100) +#define AR0144_MIN_ANA_GAIN(n) ((n) << 5) +#define AR0144_MIN_ANA_GAIN_MASK GENMASK(6, 5) +#define AR0144_AUTO_DG_EN BIT(4) +#define AR0144_AUTO_AG_EN BIT(1) +#define AR0144_AE_ENABLE BIT(0) +#define AR0144_AE_LUMA_TARGET_REG CCI_REG16(0x3102) +#define AR0144_AE_MIN_EV_STEP_REG CCI_REG16(0x3108) +#define AR0144_AE_MAX_EV_STEP_REG CCI_REG16(0x310a) +#define AR0144_AE_DAMP_OFFSET_REG CCI_REG16(0x310c) +#define AR0144_AE_DAMP_GAIN_REG CCI_REG16(0x310e) +#define AR0144_AE_DAMP_MAX_REG CCI_REG16(0x3110) +#define AR0144_AE_MAX_EXPOSURE_REG CCI_REG16(0x311c) +#define AR0144_AE_MIN_EXPOSURE_REG CCI_REG16(0x311e) +#define AR0144_AE_COARSE_INTEGRATION_TIME CCI_REG16(0x3164) +#define AR0144_DELTA_DK_CONTROL CCI_REG16(0x3180) +#define AR0144_DELTA_DK_SUB_EN BIT(15) +#define AR0144_DELTA_DK_EVERY_FRAME BIT(14) +#define AR0144_DELTA_DK_RECALC BIT(13) +#define AR0144_DELTA_DK_GRADIENT_REMOVAL BIT(10) +#define AR0144_DATA_FORMAT_BITS CCI_REG16(0x31ac) +#define AR0144_DATA_FORMAT_IN(n) ((n) << 8) +#define AR0144_DATA_FORMAT_OUT(n) ((n) << 0) +#define AR0144_SERIAL_FORMAT CCI_REG16(0x31ae) +#define AR0144_NUM_LANES(n) (n) +#define AR0144_NUM_LANES_MASK GENMASK(1, 0) +#define AR0144_FRAME_PREAMBLE CCI_REG16(0x31b0) +#define AR0144_LINE_PREAMBLE CCI_REG16(0x31b2) +#define AR0144_MIPI_TIMING_0 CCI_REG16(0x31b4) +#define AR0144_T_HS_PREPARE(n) ((n) << 12) +#define AR0144_T_HS_ZERO(n) ((n) << 8) +#define AR0144_T_HS_TRAIL(n) ((n) << 4) +#define AR0144_T_CLK_TRAIL(n) ((n) << 0) +#define AR0144_MIPI_TIMING_1 CCI_REG16(0x31b6) +#define AR0144_T_CLK_PREPARE(n) ((n) << 12) +#define AR0144_T_HS_EXIT(n) ((n) << 6) +#define AR0144_T_CLK_ZERO(n) ((n) << 0) +#define AR0144_MIPI_TIMING_2 CCI_REG16(0x31b8) +#define AR0144_T_BGAP(n) ((n) << 12) +#define AR0144_T_CLK_PRE(n) ((n) << 6) +#define AR0144_T_CLK_POST(n) ((n) << 0) +#define AR0144_MIPI_TIMING_3 CCI_REG16(0x31ba) +#define AR0144_T_LPX(n) ((n) << 7) +#define AR0144_T_WAKE_UP(n) ((n) << 0) +#define AR0144_MIPI_TIMING_4 CCI_REG16(0x31bc) +#define AR0144_CONT_TX_CLK BIT(15) +#define AR0144_HEAVY_LP_LOAD BIT(14) +#define AR0144_T_INIT(n) ((n) << 0) +#define AR0144_SERIAL_CONFIG_STATUS CCI_REG16(0x31be) +#define AR0144_SERIAL_CONTROL_STATUS CCI_REG16(0x31c6) +#define AR0144_FRAMER_TEST_MODE BIT(7) +#define AR0144_SERIAL_CRC_0 CCI_REG16(0x31c8) +#define AR0144_COMPANDING CCI_REG16(0x31d0) +#define AR0144_COMPAND_EN BIT(0) +#define AR0144_STAT_FRAME_ID CCI_REG16(0x31d2) +#define AR0144_I2C_WRT_CHEKCSUM CCI_REG16(0x31d6) +#define AR0144_SERIAL_TEST CCI_REG16(0x31d8) +#define AR0144_TEST_LANE_EN(n) ((n) << 8) +#define AR0144_TEST_LANE_EN_MASK GENMASK(11, 8) +#define AR0144_TEST_MODE_LP00 (0 << 4) +#define AR0144_TEST_MODE_LP11 (1 << 4) +#define AR0144_TEST_MODE_HS0 (2 << 4) +#define AR0144_TEST_MODE_HS1 (3 << 4) +#define AR0144_TEST_MODE_SQUARE_HALF (4 << 4) +#define AR0144_TEST_MODE_SQUARE_FULL (5 << 4) +#define AR0144_TEST_MODE_SQUARE_LP (6 << 4) +#define AR0144_TEST_MODE_PRBS31 (7 << 4) +#define AR0144_TEST_MODE_PRBS9 (8 << 4) +#define AR0144_TEST_MODE_MASK GENMASK(7, 0) +#define AR0144_PIX_DEF_1D CCI_REG16(0x31e0) +#define AR0144_PIX_DEF_1D_DDC_EN BIT(3) +#define AR0144_PIX_DEF_CORRECTION_MODE BIT(1) +#define AR0144_PIX_DEF_ENABLE BIT(0) +#define AR0144_HORIZONTAL_CURSOR_POSITION CCI_REG16(0x31e8) +#define AR0144_VERTICAL_CURSOR_POSITION CCI_REG16(0x31ea) +#define AR0144_HORIZONTAL_CURSOR_WIDTH CCI_REG16(0x31ec) +#define AR0144_VERTICAL_CURSOR_WIDTH CCI_REG16(0x31ee) +#define AR0144_CCI_IDS CCI_REG16(0x31fc) +#define AR0144_CUSTOMER_REV CCI_REG16(0x31fe) +#define AR0144_CUSTOMER_REV_CRA(n) (((n) & GENMASK(9, 7)) >> 7) +#define AR0144_CUSTOMER_REV_CFA(n) (((n) & GENMASK(6, 4)) >> 4) +#define AR0144_CUSTOMER_REV_CFA_COLOR 1 +#define AR0144_CUSTOMER_REV_CFA_MONO 2 +#define AR0144_LED_FLASH_CONTROL CCI_REG16(0x3270) +#define AR0144_LED_FLASH_EN BIT(8) +#define AR0144_LED_DELAY(n) ((n) << 0) +#define AR0144_LED_DELAY_MASK GENMASK(7, 0) +#define AR0144_MIPI_TEST_CNTRL CCI_REG16(0x3338) +#define AR0144_MIPI_COMPRESS_8_DATA_TYPE CCI_REG16(0x333a) +#define AR0144_MIPI_COMPRESS_7_DATA_TYPE CCI_REG16(0x333c) +#define AR0144_MIPI_COMPRESS_6_DATA_TYPE CCI_REG16(0x333e) +#define AR0144_MIPI_JPEG_PN9_DATA_TYPE CCI_REG16(0x3340) +#define AR0144_MIPI_CNTRL CCI_REG16(0x3354) +#define AR0144_CHAN_NUM(n) ((n) << 6) +#define AR0144_DATA_TYPE_XMIT(n) ((n) << 0) +#define AR0144_MIPI_TEST_PATTERN_CNTRL CCI_REG16(0x3356) +#define AR0144_MIPI_TEST_PATTERN_STATUS CCI_REG16(0x3358) +#define AR0144_DIGITAL_CTRL_1 CCI_REG16(0x3786) +#define AR0144_LSB_ALIGN_PARA_OUT BIT(5) +#define AR0144_USE_1FRAME_SYNCED BIT(4) +#define AR0144_PLL_TEST_MODE BIT(3) +#define AR0144_DRIVE_PIX_CLK BIT(0) + +#define AR0144_MIN_CSI2_LINK_FREQ 150000000U +#define AR0144_MAX_CSI2_LINK_FREQ 384000000U + +/* + * The pixel array contains 1300x820 optically transparent pixels, with 6 dummy + * pixels on each side that can't be read out. The active size is 1288x808. + */ +#define AR0144_PIXEL_ARRAY_WIDTH 1300U +#define AR0144_PIXEL_ARRAY_HEIGHT 820U +#define AR0144_PIXEL_ARRAY_ACTIVE_LEFT 6U +#define AR0144_PIXEL_ARRAY_ACTIVE_TOP 6U +#define AR0144_PIXEL_ARRAY_ACTIVE_WIDTH 1288U +#define AR0144_PIXEL_ARRAY_ACTIVE_HEIGHT 808U + +/* + * Documentation indicates minimum horizontal and vertical blanking of 208 + * pixels and 27 lines respectively, which matches the default values for the + * LINE_LENGTH_PCK and FRAME_LENGTH_LINES registers. Out-of-tree drivers are + * known to successfully use 22 or 25 lines of vertical blanking. This is + * likely related to the fact that the total number of rows per frame is equal + * to FRAME_LENGTH_LINES plus a 5 lines overhead, as indicated in at least one + * place in the documentation. + */ +#define AR0144_MIN_HBLANK 208U +#define AR0144_MIN_VBLANK 27U + +#define AR0144_FRAME_LENGTH_OVERHEAD 5U + +/* The minimum values are not documented, pick reasonable minimums. */ +#define AR0144_MIN_WIDTH 32U +#define AR0144_MIN_HEIGHT 32U +#define AR0144_DEF_WIDTH 1280U +#define AR0144_DEF_HEIGHT 800U + +#define AR0144_NUM_SUPPLIES 3 + +struct ar0144_model { + bool mono; +}; + +struct ar0144_format_info { + u32 colour; + u32 mono; + u16 bpp; + u16 dt; +}; + +static const struct ar0144_model ar0144_model_color = { + .mono = false, +}; + +static const struct ar0144_model ar0144_model_mono = { + .mono = true, +}; + +static const struct ar0144_format_info ar0144_formats[] = { + { + .colour = MEDIA_BUS_FMT_SGRBG12_1X12, + .mono = MEDIA_BUS_FMT_Y12_1X12, + .bpp = 12, + .dt = MIPI_CSI2_DT_RAW12, + }, { + .colour = MEDIA_BUS_FMT_SGRBG10_1X10, + .mono = MEDIA_BUS_FMT_Y10_1X10, + .bpp = 10, + .dt = MIPI_CSI2_DT_RAW10, + }, { + .colour = MEDIA_BUS_FMT_SGRBG8_1X8, + .mono = MEDIA_BUS_FMT_Y8_1X8, + .bpp = 8, + .dt = MIPI_CSI2_DT_RAW8, + }, +}; + +struct ar0144 { + struct device *dev; + + struct regmap *regmap; + struct clk *clk; + struct gpio_desc *reset; + struct regulator_bulk_data supplies[AR0144_NUM_SUPPLIES]; + + ktime_t off_time; + + struct ccs_pll pll; + + struct v4l2_fwnode_endpoint bus_cfg; + u64 valid_link_freqs[ARRAY_SIZE(ar0144_formats)]; + u32 valid_formats; + + struct v4l2_subdev sd; + struct media_pad pad; + + const struct ar0144_model *model; + + struct v4l2_ctrl_handler ctrls; + struct v4l2_ctrl *pixel_rate; + struct v4l2_ctrl *link_freq; + struct v4l2_ctrl *hblank; + struct v4l2_ctrl *vblank; + struct v4l2_ctrl *exposure; + struct v4l2_ctrl *test_data[4]; + struct { + struct v4l2_ctrl *hflip; + struct v4l2_ctrl *vflip; + }; +}; + +static inline struct ar0144 *to_ar0144(struct v4l2_subdev *sd) +{ + return container_of(sd, struct ar0144, sd); +} + +static u32 ar0144_format_code(struct ar0144 *sensor, + const struct ar0144_format_info *info) +{ + return sensor->model->mono ? info->mono : info->colour; +} + +static const struct ar0144_format_info * +ar0144_format_info(struct ar0144 *sensor, u32 code, bool use_def) +{ + const struct ar0144_format_info *def = NULL; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(ar0144_formats); ++i) { + const struct ar0144_format_info *info = &ar0144_formats[i]; + u32 info_code = ar0144_format_code(sensor, info); + + if (!(sensor->valid_formats & BIT(i))) + continue; + + if (info_code == code) + return info; + + if (!def) + def = info; + } + + return use_def ? def : NULL; +} + +/* ----------------------------------------------------------------------------- + * Hardware configuration + */ + +static int ar0144_configure_pll(struct ar0144 *sensor) +{ + int ret = 0; + + cci_write(sensor->regmap, AR0144_PRE_PLL_CLK_DIV, + sensor->pll.vt_fr.pre_pll_clk_div, &ret); + cci_write(sensor->regmap, AR0144_PLL_MULTIPLIER, + sensor->pll.vt_fr.pll_multiplier, &ret); + cci_write(sensor->regmap, AR0144_VT_PIX_CLK_DIV, + sensor->pll.vt_bk.pix_clk_div, &ret); + cci_write(sensor->regmap, AR0144_VT_SYS_CLK_DIV, + sensor->pll.vt_bk.sys_clk_div, &ret); + cci_write(sensor->regmap, AR0144_OP_PIX_CLK_DIV, + sensor->pll.op_bk.pix_clk_div, &ret); + cci_write(sensor->regmap, AR0144_OP_SYS_CLK_DIV, + sensor->pll.op_bk.sys_clk_div, &ret); + + /* Wait 1ms for the PLL to lock. */ + fsleep(1000); + + return ret; +} + +static int ar0144_configure_mipi(struct ar0144 *sensor, + const struct ar0144_format_info *info) +{ + unsigned int num_lanes = sensor->bus_cfg.bus.mipi_csi2.num_data_lanes; + bool cont_clk = !(sensor->bus_cfg.bus.mipi_csi2.flags & + V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK); + int ret = 0; + + cci_write(sensor->regmap, AR0144_SERIAL_FORMAT, num_lanes | 0x0200, + &ret); + + cci_write(sensor->regmap, AR0144_MIPI_CNTRL, + AR0144_CHAN_NUM(0) | AR0144_DATA_TYPE_XMIT(info->dt), &ret); + + cci_write(sensor->regmap, AR0144_MIPI_TIMING_0, + AR0144_T_HS_PREPARE(2) | AR0144_T_HS_ZERO(6) | + AR0144_T_HS_TRAIL(6) | AR0144_T_CLK_TRAIL(5), &ret); + cci_write(sensor->regmap, AR0144_MIPI_TIMING_1, + AR0144_T_CLK_PREPARE(1) | AR0144_T_HS_EXIT(4) | + AR0144_T_CLK_ZERO(14), &ret); + cci_write(sensor->regmap, AR0144_MIPI_TIMING_2, + AR0144_T_BGAP(2) | AR0144_T_CLK_PRE(1) | AR0144_T_CLK_POST(7), + &ret); + cci_write(sensor->regmap, AR0144_MIPI_TIMING_3, + AR0144_T_LPX(2) | AR0144_T_WAKE_UP(5), &ret); + cci_write(sensor->regmap, AR0144_MIPI_TIMING_4, + AR0144_T_INIT(4) | (cont_clk ? AR0144_CONT_TX_CLK : 0), + &ret); + + return ret; +} + +static int ar0144_start_streaming(struct ar0144 *sensor, + const struct v4l2_subdev_state *state) +{ + const struct v4l2_mbus_framefmt *format; + const struct ar0144_format_info *info; + const struct v4l2_rect *crop; + unsigned int bin_x, bin_y; + int ret = 0; + u16 val; + + /* + * The link frequency cannot change during streaming. Grab it first, so + * that it won't be set by the __v4l2_ctrl_handler_setup() call below. + */ + __v4l2_ctrl_grab(sensor->link_freq, true); + + format = v4l2_subdev_state_get_format(state, 0); + crop = v4l2_subdev_state_get_crop(state, 0); + info = ar0144_format_info(sensor, format->code, true); + + ret = ar0144_configure_pll(sensor); + if (ret) + goto error; + + cci_write(sensor->regmap, AR0144_DIGITAL_TEST, + (sensor->model->mono ? AR0144_MONO_CHROME_OPERATION : 0) | + 0x0038, &ret); + + cci_write(sensor->regmap, AR0144_DATA_FORMAT_BITS, + AR0144_DATA_FORMAT_IN(info->bpp) | + AR0144_DATA_FORMAT_OUT(info->bpp), &ret); + + /* Analog crop rectangle, binning/skipping. */ + cci_write(sensor->regmap, AR0144_X_ADDR_START, crop->left, &ret); + cci_write(sensor->regmap, AR0144_Y_ADDR_START, crop->top, &ret); + cci_write(sensor->regmap, AR0144_X_ADDR_END, + crop->left + crop->width - 1, &ret); + cci_write(sensor->regmap, AR0144_Y_ADDR_END, + crop->top + crop->height - 1, &ret); + + bin_x = crop->width / format->width; + bin_y = crop->height / format->height; + + cci_write(sensor->regmap, AR0144_X_ODD_INC, (bin_x << 1) - 1, &ret); + cci_write(sensor->regmap, AR0144_Y_ODD_INC, (bin_y << 1) - 1, &ret); + + /* + * Enable generation of embedded statistics, required for the on-chip + * auto-exposure. There is no downside in enabling it unconditionally. + */ + cci_write(sensor->regmap, AR0144_SMIA_TEST, AR0144_STATS_EN | 0x1802, + &ret); + + if (ret) + goto error; + + ret = __v4l2_ctrl_handler_setup(&sensor->ctrls); + if (ret) + goto error; + + ret = ar0144_configure_mipi(sensor, info); + + /* + * We're all set, start streaming. Mask bad frames and keep read-only + * registers locked. + */ + val = AR0144_MASK_BAD | AR0144_LOCK_REG | AR0144_STREAM | 0x2010; + cci_write(sensor->regmap, AR0144_RESET_REGISTER, val, &ret); + + if (ret) + goto error; + + return 0; + +error: + __v4l2_ctrl_grab(sensor->link_freq, false); + return ret; +} + +#define ar0144_read_poll_timeout(sensor, addr, val, cond, sleep_us, timeout_us) \ +({ \ + int __ret, __err; \ + __ret = read_poll_timeout(cci_read, __err, __err || (cond), sleep_us, \ + timeout_us, false, (sensor)->regmap, addr, \ + &(val), NULL); \ + __ret ? : __err; \ +}) + +static int ar0144_stop_streaming(struct ar0144 *sensor) +{ + u16 reset_bits = AR0144_MASK_BAD | AR0144_LOCK_REG | 0x2010; + int ret; + u64 val; + + __v4l2_ctrl_grab(sensor->link_freq, false); + + /* + * Initiate the transition to standby by clearing the STREAM bit. Don't + * clear the bits that affect the output interface yet. + */ + ret = cci_write(sensor->regmap, AR0144_RESET_REGISTER, reset_bits, NULL); + if (ret) + return ret; + + ret = ar0144_read_poll_timeout(sensor, AR0144_FRAME_STATUS, val, + val & AR0144_STANDBY_STATUS, 2000, + 2000000); + if (ret) + dev_warn(sensor->dev, "%s while trying to enter standby (%d)\n", + ret == -ETIMEDOUT ? "timeout" : "error", ret); + + /* Standby state reached, disable the output interface. */ + reset_bits |= AR0144_SMIA_SERIALIZER_DIS; + reset_bits &= ~(AR0144_PARALLEL_EN | AR0144_DRIVE_PINS); + + return cci_write(sensor->regmap, AR0144_RESET_REGISTER, reset_bits, NULL); +} + +/* ----------------------------------------------------------------------------- + * PLL + */ + +static int ar0144_pll_calculate(struct ar0144 *sensor, struct ccs_pll *pll, + unsigned int link_freq, unsigned int bpp) +{ + struct ccs_pll_limits limits = { + .min_ext_clk_freq_hz = 6000000, + .max_ext_clk_freq_hz = 48000000, + + .vt_fr = { + .min_pre_pll_clk_div = 1, + .max_pre_pll_clk_div = 63, + .min_pll_ip_clk_freq_hz = 1000000, /* min_pll_op_clk_freq_hz / max_pll_multiplier */ + .max_pll_ip_clk_freq_hz = 24000000, /* max_pll_op_clk_freq_hz / min_pll_multiplier */ + .min_pll_multiplier = 32, + .max_pll_multiplier = 384, + .min_pll_op_clk_freq_hz = 384000000, + .max_pll_op_clk_freq_hz = 768000000, + }, + .vt_bk = { + .min_sys_clk_div = 1, + .max_sys_clk_div = 16, + .min_pix_clk_div = 4, + .max_pix_clk_div = 16, + .min_pix_clk_freq_hz = 6000000, /* No documented limit */ + .max_pix_clk_freq_hz = 74250000, + }, + .op_bk = { + .min_sys_clk_div = 1, + .max_sys_clk_div = 16, + .min_pix_clk_div = 8, + .max_pix_clk_div = 12, + .min_pix_clk_freq_hz = 6000000, /* No documented limit */ + .max_pix_clk_freq_hz = 74250000, + }, + + .min_line_length_pck_bin = 1200 + AR0144_MIN_HBLANK, /* To be checked */ + .min_line_length_pck = 1200 + AR0144_MIN_HBLANK, + }; + unsigned int num_lanes = sensor->bus_cfg.bus.mipi_csi2.num_data_lanes; + int ret; + + /* + * The OP pixel clock limits depends on the number of lanes, which the + * PLL calculator doesn't take into account despite specifying the + * CCS_PLL_FLAG_LANE_SPEED_MODEL flag. Adjust them manually. + */ + limits.op_bk.min_pix_clk_freq_hz /= num_lanes; + limits.op_bk.max_pix_clk_freq_hz /= num_lanes; + + /* + * There are no documented constraints on the sys clock frequency, for + * either branch. Recover them based on the PLL output clock frequency + * and sys_clk_div limits on one hand, and the pix clock frequency and + * the pix_clk_div limits on the other hand. + */ + limits.vt_bk.min_sys_clk_freq_hz = + max(limits.vt_fr.min_pll_op_clk_freq_hz / limits.vt_bk.max_sys_clk_div, + limits.vt_bk.min_pix_clk_freq_hz * limits.vt_bk.min_pix_clk_div); + limits.vt_bk.max_sys_clk_freq_hz = + min(limits.vt_fr.max_pll_op_clk_freq_hz / limits.vt_bk.min_sys_clk_div, + limits.vt_bk.max_pix_clk_freq_hz * limits.vt_bk.max_pix_clk_div); + + limits.op_bk.min_sys_clk_freq_hz = + max(limits.vt_fr.min_pll_op_clk_freq_hz / limits.op_bk.max_sys_clk_div, + limits.op_bk.min_pix_clk_freq_hz * limits.op_bk.min_pix_clk_div); + limits.op_bk.max_sys_clk_freq_hz = + min(limits.vt_fr.max_pll_op_clk_freq_hz / limits.op_bk.min_sys_clk_div, + limits.op_bk.max_pix_clk_freq_hz * limits.op_bk.max_pix_clk_div); + + memset(pll, 0, sizeof(*pll)); + + pll->bus_type = CCS_PLL_BUS_TYPE_CSI2_DPHY; + pll->op_lanes = num_lanes; + pll->vt_lanes = 1; + pll->csi2.lanes = num_lanes; + /* + * As the sensor doesn't support FIFO derating, binning doesn't + * influence the PLL configuration. Hardcode the binning factors. + */ + pll->binning_horizontal = 1; + pll->binning_vertical = 1; + pll->scale_m = 1; + pll->scale_n = 1; + pll->bits_per_pixel = bpp; + pll->flags = CCS_PLL_FLAG_LANE_SPEED_MODEL; + pll->link_freq = link_freq; + pll->ext_clk_freq_hz = clk_get_rate(sensor->clk); + + ret = ccs_pll_calculate(sensor->dev, &limits, pll); + if (ret) + return ret; + + /* + * The sensor ignores the LSB of the PLL multiplier. If the multiplier + * is an odd value, as a workaround to avoid precision loss, multiply + * both the pre-divider and the multiplier by 2 if this doesn't bring + * them beyond their maximum values. This doesn't necessarily guarantee + * optimum PLL parameters. Ideally the PLL calculator should handle + * this constraint. + */ + if ((pll->vt_fr.pll_multiplier & 1) && + pll->vt_fr.pll_multiplier * 2 <= limits.vt_fr.max_pll_multiplier && + pll->vt_fr.pre_pll_clk_div * 2 <= limits.vt_fr.max_pre_pll_clk_div) { + pll->vt_fr.pll_multiplier *= 2; + pll->vt_fr.pre_pll_clk_div *= 2; + } + + if (pll->vt_fr.pll_multiplier & 1) + dev_warn(sensor->dev, + "Odd PLL multiplier, link frequency %u will not be exact\n", + pll->link_freq); + + return 0; +} + +static int ar0144_pll_update(struct ar0144 *sensor, + const struct ar0144_format_info *info) +{ + u64 link_freq; + int ret; + + link_freq = sensor->bus_cfg.link_frequencies[sensor->link_freq->val]; + ret = ar0144_pll_calculate(sensor, &sensor->pll, link_freq, info->bpp); + if (ret) { + dev_err(sensor->dev, "PLL calculations failed: %d\n", ret); + return ret; + } + + __v4l2_ctrl_s_ctrl_int64(sensor->pixel_rate, + sensor->pll.pixel_rate_pixel_array); + + return 0; +} + +/* ----------------------------------------------------------------------------- + * V4L2 controls + */ + +static const char * const ar0144_test_pattern_menu[] = { + "Disabled", + "Solid color", + "Full Color Bars", + "Fade to Gray Color Bars", + "Walking 1", +}; + +static const u32 ar0144_test_pattern_values[] = { + AR0144_TEST_PATTERN_NONE, + AR0144_TEST_PATTERN_SOLID, + AR0144_TEST_PATTERN_BARS, + AR0144_TEST_PATTERN_BARS_FADE, + AR0144_TEST_PATTERN_WALKING_1S, +}; + +static void ar0144_update_link_freqs(struct ar0144 *sensor, + const struct ar0144_format_info *info) +{ + u64 valid_link_freqs; + unsigned int index; + unsigned int min; + unsigned int max; + + index = info - ar0144_formats; + valid_link_freqs = sensor->valid_link_freqs[index]; + + min = __ffs(valid_link_freqs); + max = __fls(valid_link_freqs); + + __v4l2_ctrl_modify_range(sensor->link_freq, min, max, ~valid_link_freqs, + min); +} + +static int ar0144_update_exposure(struct ar0144 *sensor, + const struct v4l2_rect *crop) +{ + unsigned int max; + + /* The coarse integration time is limited to FRAME_LENGTH_LINES - 1. */ + max = crop->height + sensor->vblank->val - 1 + - AR0144_FRAME_LENGTH_OVERHEAD; + return __v4l2_ctrl_modify_range(sensor->exposure, 1, max, 1, max); +} + +static void ar0144_update_blanking(struct ar0144 *sensor, + const struct v4l2_subdev_state *state) +{ + const struct v4l2_rect *crop; + unsigned int min; + unsigned int max; + + crop = v4l2_subdev_state_get_crop(state, 0); + + /* + * Horizontally, the line length (in pixel clocks), programmed in the + * LINE_LENGTH_PCK register, is equal to the sum of the crop width and + * the horizontal blanking. The sensor has lower and upper bounds for + * the LINE_LENGTH_PCK value, as well as a lower bound for the + * horizontal blanking. + */ + min = max_t(int, AR0144_MIN_LINE_LENGTH_PCK - crop->width, + AR0144_MIN_HBLANK); + max = AR0144_MAX_LINE_LENGTH_PCK - crop->width; + __v4l2_ctrl_modify_range(sensor->hblank, min, max, 2, min); + + /* + * Vertically, the situation is more complicated. The frame length (in + * lines) is equal to the FRAME_LENGTH_LINES register value plus 5 + * lines of overhead. This needs to be taken into account for the + * VBLANK calculation. + */ + min = max_t(int, AR0144_MIN_FRAME_LENGTH_LINES - crop->height + + AR0144_FRAME_LENGTH_OVERHEAD, AR0144_MIN_VBLANK); + max = AR0144_MAX_FRAME_LENGTH_LINES - crop->height + + AR0144_FRAME_LENGTH_OVERHEAD; + __v4l2_ctrl_modify_range(sensor->vblank, min, max, 1, min); + + ar0144_update_exposure(sensor, crop); +} + +static int ar0144_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct ar0144 *sensor = container_of(ctrl->handler, struct ar0144, ctrls); + const struct v4l2_subdev_state *state; + const struct v4l2_mbus_framefmt *format; + const struct ar0144_format_info *info; + const struct v4l2_rect *crop; + int ret = 0; + + /* + * Return immediately for controls that don't need to be applied to the + * device. + */ + if (ctrl->flags & (V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_GRABBED)) + return 0; + + /* + * First process controls that update other parts of the device + * configuration. + */ + state = v4l2_subdev_get_locked_active_state(&sensor->sd); + format = v4l2_subdev_state_get_format(state, 0); + info = ar0144_format_info(sensor, format->code, true); + crop = v4l2_subdev_state_get_crop(state, 0); + + switch (ctrl->id) { + case V4L2_CID_VBLANK: + ret = ar0144_update_exposure(sensor, crop); + break; + + case V4L2_CID_LINK_FREQ: + ret = ar0144_pll_update(sensor, info); + break; + + default: + break; + } + + if (ret) + return ret; + + /* + * Apply controls to the hardware. If power is down, they controls will + * be applied when starting streaming. + */ + if (!pm_runtime_get_if_in_use(sensor->dev)) + return 0; + + switch (ctrl->id) { + case V4L2_CID_ANALOGUE_GAIN: + cci_write(sensor->regmap, AR0144_ANALOG_GAIN, ctrl->val, &ret); + break; + + case V4L2_CID_DIGITAL_GAIN: + cci_write(sensor->regmap, AR0144_GLOBAL_GAIN, ctrl->val, &ret); + break; + + case V4L2_CID_EXPOSURE: + cci_write(sensor->regmap, AR0144_COARSE_INTEGRATION_TIME, + ctrl->val, &ret); + break; + + case V4L2_CID_HBLANK: + cci_write(sensor->regmap, AR0144_LINE_LENGTH_PCK, + crop->width + ctrl->val, &ret); + break; + + case V4L2_CID_VBLANK: + cci_write(sensor->regmap, AR0144_FRAME_LENGTH_LINES, + crop->height + ctrl->val - AR0144_FRAME_LENGTH_OVERHEAD, + &ret); + break; + + case V4L2_CID_TEST_PATTERN: + cci_write(sensor->regmap, AR0144_TEST_PATTERN_MODE, + ar0144_test_pattern_values[ctrl->val], &ret); + + /* + * Register 0x3044 is not documented, but mentioned in the test + * pattern configuration. Bits [5:4] should be set to 0 to + * avoid clipping pixel values to 0xf70. + */ + cci_write(sensor->regmap, CCI_REG16(0x3044), + ctrl->val ? 0x0400 : 0x0410, &ret); + break; + + case V4L2_CID_TEST_PATTERN_RED: + case V4L2_CID_TEST_PATTERN_GREENR: + case V4L2_CID_TEST_PATTERN_BLUE: + case V4L2_CID_TEST_PATTERN_GREENB: + cci_write(sensor->regmap, AR0144_GROUPED_PARAMETER_HOLD_, + 1, &ret); + + cci_write(sensor->regmap, AR0144_TEST_DATA_RED, + sensor->test_data[0]->val, &ret); + cci_write(sensor->regmap, AR0144_TEST_DATA_GREENR, + sensor->test_data[1]->val, &ret); + cci_write(sensor->regmap, AR0144_TEST_DATA_BLUE, + sensor->test_data[2]->val, &ret); + cci_write(sensor->regmap, AR0144_TEST_DATA_GREENB, + sensor->test_data[3]->val, &ret); + + cci_write(sensor->regmap, AR0144_GROUPED_PARAMETER_HOLD_, + 0, &ret); + break; + + case V4L2_CID_HFLIP: + case V4L2_CID_VFLIP: + { + u16 reg = 0; + + if (sensor->hflip->val) + reg |= AR0144_ORIENTATION_HORIZ_MIRROR; + if (sensor->vflip->val) + reg |= AR0144_ORIENTATION_VERT_FLIP; + + cci_write(sensor->regmap, AR0144_IMAGE_ORIENTATION, reg, &ret); + break; + } + + case V4L2_CID_EXPOSURE_AUTO: + cci_write(sensor->regmap, AR0144_AECTRLREG, + ctrl->val == V4L2_EXPOSURE_AUTO ? + AR0144_AUTO_AG_EN | AR0144_AE_ENABLE : 0, &ret); + break; + + case V4L2_CID_LINK_FREQ: + break; + + default: + ret = -EINVAL; + break; + } + + pm_runtime_mark_last_busy(sensor->dev); + pm_runtime_put_autosuspend(sensor->dev); + + return ret; +} + +static const struct v4l2_ctrl_ops ar0144_ctrl_ops = { + .s_ctrl = ar0144_s_ctrl, +}; + +static int ar0144_init_ctrls(struct ar0144 *sensor) +{ + static const u32 test_pattern_ctrls[] = { + V4L2_CID_TEST_PATTERN_RED, + V4L2_CID_TEST_PATTERN_GREENR, + V4L2_CID_TEST_PATTERN_BLUE, + V4L2_CID_TEST_PATTERN_GREENB, + }; + struct v4l2_fwnode_device_properties props; + unsigned int i; + int ret; + + ret = v4l2_fwnode_device_parse(sensor->dev, &props); + if (ret < 0) + return ret; + + v4l2_ctrl_handler_init(&sensor->ctrls, 17); + + v4l2_ctrl_new_fwnode_properties(&sensor->ctrls, &ar0144_ctrl_ops, + &props); + + /* + * Set the link frequency, pixel rate, horizontal blanking and vertical + * blanking and exposure to hardcoded values. They will be updated by + * ar0144_update_link_freqs(), ar0144_pll_update() and + * ar0144_update_blanking(). + */ + sensor->pixel_rate = + v4l2_ctrl_new_std(&sensor->ctrls, &ar0144_ctrl_ops, + V4L2_CID_PIXEL_RATE, 1, INT_MAX, 1, 1); + sensor->link_freq = + v4l2_ctrl_new_int_menu(&sensor->ctrls, &ar0144_ctrl_ops, + V4L2_CID_LINK_FREQ, + sensor->bus_cfg.nr_of_link_frequencies - 1, 0, + sensor->bus_cfg.link_frequencies); + + sensor->hblank = v4l2_ctrl_new_std(&sensor->ctrls, &ar0144_ctrl_ops, + V4L2_CID_HBLANK, AR0144_MIN_HBLANK, + AR0144_MIN_HBLANK, 2, AR0144_MIN_HBLANK); + sensor->vblank = v4l2_ctrl_new_std(&sensor->ctrls, &ar0144_ctrl_ops, + V4L2_CID_VBLANK, AR0144_MIN_VBLANK, + AR0144_MIN_VBLANK, 1, AR0144_MIN_VBLANK); + + sensor->exposure = v4l2_ctrl_new_std(&sensor->ctrls, &ar0144_ctrl_ops, + V4L2_CID_EXPOSURE, 1, + AR0144_MAX_FRAME_LENGTH_LINES - 1, + 1, 16); + + /* + * The sensor analogue gain is split in an exponential coarse gain and + * a fine gain. The minimum recommended gain is 1.6842, which maps to a + * gain code of 13. Set the minimum to 0 to expose the whole range of + * possible values, and the default to the recommended minimum. + */ + v4l2_ctrl_new_std(&sensor->ctrls, &ar0144_ctrl_ops, + V4L2_CID_ANALOGUE_GAIN, 0, 79, 1, 13); + + v4l2_ctrl_new_std(&sensor->ctrls, &ar0144_ctrl_ops, + V4L2_CID_DIGITAL_GAIN, 0, 0x7ff, 1, 0x080); + + v4l2_ctrl_new_std_menu(&sensor->ctrls, &ar0144_ctrl_ops, + V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, + ~(BIT(V4L2_EXPOSURE_AUTO) | BIT(V4L2_EXPOSURE_MANUAL)), + V4L2_EXPOSURE_MANUAL); + + v4l2_ctrl_new_std_menu_items(&sensor->ctrls, &ar0144_ctrl_ops, + V4L2_CID_TEST_PATTERN, + ARRAY_SIZE(ar0144_test_pattern_menu) - 1, + 0, 0, ar0144_test_pattern_menu); + + for (i = 0; i < ARRAY_SIZE(test_pattern_ctrls); ++i) + sensor->test_data[i] = + v4l2_ctrl_new_std(&sensor->ctrls, &ar0144_ctrl_ops, + test_pattern_ctrls[i], 0, 4095, 1, 0); + + sensor->hflip = v4l2_ctrl_new_std(&sensor->ctrls, &ar0144_ctrl_ops, + V4L2_CID_HFLIP, 0, 1, 1, 0); + sensor->vflip = v4l2_ctrl_new_std(&sensor->ctrls, &ar0144_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 0); + + if (sensor->ctrls.error) { + ret = sensor->ctrls.error; + v4l2_ctrl_handler_free(&sensor->ctrls); + return ret; + } + + v4l2_ctrl_cluster(4, sensor->test_data); + v4l2_ctrl_cluster(2, &sensor->hflip); + + sensor->sd.ctrl_handler = &sensor->ctrls; + + return 0; +} + +/* ----------------------------------------------------------------------------- + * V4L2 subdev operations + */ + +static int ar0144_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_mbus_code_enum *code) +{ + struct ar0144 *sensor = to_ar0144(sd); + unsigned int index = 0; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(ar0144_formats); ++i) { + const struct ar0144_format_info *info = &ar0144_formats[i]; + + if (!(sensor->valid_formats & BIT(i))) + continue; + + if (code->index == index) { + code->code = ar0144_format_code(sensor, info); + return 0; + } + + index++; + } + + return -EINVAL; +} + +static int ar0144_enum_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_frame_size_enum *fse) +{ + struct ar0144 *sensor = to_ar0144(sd); + const struct ar0144_format_info *info; + const struct v4l2_rect *crop; + + info = ar0144_format_info(sensor, fse->code, false); + if (!info) + return -EINVAL; + + /* + * Enumerate binning/skipping. Supported factors are powers of two from + * /1 to /16. + */ + + if (fse->index >= 5) + return -EINVAL; + + crop = v4l2_subdev_state_get_crop(state, fse->pad); + + fse->min_width = crop->width / (1 << fse->index); + fse->max_width = fse->min_width; + fse->min_height = crop->height / (1 << fse->index); + fse->max_height = fse->min_height; + + return 0; +} + +static int ar0144_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_format *format) +{ + struct ar0144 *sensor = to_ar0144(sd); + const struct ar0144_format_info *info; + struct v4l2_mbus_framefmt *fmt; + const struct v4l2_rect *crop; + unsigned int bin_x, bin_y; + + if (v4l2_subdev_is_streaming(sd) && + format->which == V4L2_SUBDEV_FORMAT_ACTIVE) + return -EBUSY; + + fmt = v4l2_subdev_state_get_format(state, format->pad); + crop = v4l2_subdev_state_get_crop(state, format->pad); + + info = ar0144_format_info(sensor, format->format.code, true); + fmt->code = ar0144_format_code(sensor, info); + + /* + * The output size results from the binning/skipping applied to the + * crop rectangle. The x/y increments must be powers of 2. Clamp the + * width/height first, to avoid both divisions by 0 and the undefined + * behaviour of roundup_pow_of_two(0). + */ + fmt->width = clamp(format->format.width, 1U, crop->width); + fmt->height = clamp(format->format.height, 1U, crop->height); + bin_x = clamp(roundup_pow_of_two(crop->width / fmt->width), 1, 16); + bin_y = clamp(roundup_pow_of_two(crop->height / fmt->height), 1, 16); + fmt->width = crop->width / bin_x; + fmt->height = crop->height / bin_y; + + format->format = *fmt; + + if (format->which != V4L2_SUBDEV_FORMAT_ACTIVE) + return 0; + + ar0144_update_link_freqs(sensor, info); + ar0144_pll_update(sensor, info); + + return 0; +} + +static int ar0144_get_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_selection *sel) +{ + switch (sel->target) { + case V4L2_SEL_TGT_CROP: + sel->r = *v4l2_subdev_state_get_crop(state, sel->pad); + break; + + case V4L2_SEL_TGT_CROP_DEFAULT: + sel->r.left = (AR0144_PIXEL_ARRAY_ACTIVE_WIDTH - AR0144_DEF_WIDTH) / 2; + sel->r.top = (AR0144_PIXEL_ARRAY_ACTIVE_HEIGHT - AR0144_DEF_HEIGHT) / 2; + sel->r.width = AR0144_DEF_WIDTH; + sel->r.height = AR0144_DEF_HEIGHT; + break; + + case V4L2_SEL_TGT_CROP_BOUNDS: + sel->r.left = 0; + sel->r.top = 0; + sel->r.width = AR0144_PIXEL_ARRAY_ACTIVE_WIDTH; + sel->r.height = AR0144_PIXEL_ARRAY_ACTIVE_HEIGHT; + break; + + default: + return -EINVAL; + } + + return 0; +} + +static int ar0144_set_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_selection *sel) +{ + struct v4l2_mbus_framefmt *fmt; + struct v4l2_rect *crop; + + if (v4l2_subdev_is_streaming(sd) && + sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) + return -EBUSY; + + if (sel->target != V4L2_SEL_TGT_CROP) + return -EINVAL; + + crop = v4l2_subdev_state_get_crop(state, 0); + fmt = v4l2_subdev_state_get_format(state, 0); + + crop->left = min_t(unsigned int, ALIGN(sel->r.left, 2), + AR0144_PIXEL_ARRAY_ACTIVE_WIDTH - AR0144_MIN_WIDTH); + crop->top = min_t(unsigned int, ALIGN(sel->r.top, 2), + AR0144_PIXEL_ARRAY_ACTIVE_HEIGHT - AR0144_MIN_HEIGHT); + crop->width = clamp(sel->r.width, AR0144_MIN_WIDTH, + AR0144_PIXEL_ARRAY_ACTIVE_WIDTH - crop->left); + crop->height = clamp(sel->r.height, AR0144_MIN_HEIGHT, + AR0144_PIXEL_ARRAY_ACTIVE_HEIGHT - crop->top); + + sel->r = *crop; + + fmt->width = crop->width; + fmt->height = crop->height; + + return 0; +} + +static int ar0144_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad, + struct v4l2_mbus_frame_desc *fd) +{ + struct ar0144 *sensor = to_ar0144(sd); + const struct ar0144_format_info *info; + const struct v4l2_mbus_framefmt *fmt; + struct v4l2_subdev_state *state; + u32 code; + + state = v4l2_subdev_lock_and_get_active_state(sd); + fmt = v4l2_subdev_state_get_format(state, 0); + code = fmt->code; + v4l2_subdev_unlock_state(state); + + info = ar0144_format_info(sensor, code, true); + + fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2; + fd->num_entries = 1; + + fd->entry[0].pixelcode = code; + fd->entry[0].stream = 0; + fd->entry[0].bus.csi2.vc = 0; + fd->entry[0].bus.csi2.dt = info->dt; + + return 0; +} + +static int ar0144_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad, + struct v4l2_mbus_config *cfg) +{ + struct ar0144 *sensor = to_ar0144(sd); + + cfg->type = sensor->bus_cfg.bus_type; + + switch (sensor->bus_cfg.bus_type) { + case V4L2_MBUS_CSI2_DPHY: + default: + cfg->bus.mipi_csi2 = sensor->bus_cfg.bus.mipi_csi2; + break; + } + + return 0; +} + +static int ar0144_enable_streams(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, u32 pad, + u64 streams_mask) +{ + struct ar0144 *sensor = to_ar0144(sd); + int ret; + + ret = pm_runtime_resume_and_get(sensor->dev); + if (ret < 0) + return ret; + + ret = ar0144_start_streaming(sensor, state); + if (ret) { + dev_err(sensor->dev, "Failed to start streaming: %d\n", + ret); + pm_runtime_put_sync(sensor->dev); + return ret; + } + + return 0; +} + +static int ar0144_disable_streams(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, u32 pad, + u64 streams_mask) +{ + struct ar0144 *sensor = to_ar0144(sd); + + ar0144_stop_streaming(sensor); + pm_runtime_mark_last_busy(sensor->dev); + pm_runtime_put_autosuspend(sensor->dev); + + return 0; +} + +static int ar0144_entity_init_state(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state) +{ + const struct ar0144_format_info *info; + struct ar0144 *sensor = to_ar0144(sd); + struct v4l2_mbus_framefmt *fmt; + struct v4l2_rect *crop; + + info = ar0144_format_info(sensor, 0, true); + + fmt = v4l2_subdev_state_get_format(state, 0); + fmt->width = AR0144_DEF_WIDTH; + fmt->height = AR0144_DEF_HEIGHT; + fmt->code = ar0144_format_code(sensor, info); + fmt->field = V4L2_FIELD_NONE; + fmt->colorspace = V4L2_COLORSPACE_RAW; + fmt->ycbcr_enc = V4L2_YCBCR_ENC_601; + fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE; + fmt->xfer_func = V4L2_XFER_FUNC_NONE; + + crop = v4l2_subdev_state_get_crop(state, 0); + crop->left = 4; + crop->top = 4; + crop->width = AR0144_DEF_WIDTH; + crop->height = AR0144_DEF_HEIGHT; + + return 0; +} + +static const struct v4l2_subdev_pad_ops ar0144_subdev_pad_ops = { + .enum_mbus_code = ar0144_enum_mbus_code, + .enum_frame_size = ar0144_enum_frame_size, + .get_fmt = v4l2_subdev_get_fmt, + .set_fmt = ar0144_set_fmt, + .get_selection = ar0144_get_selection, + .set_selection = ar0144_set_selection, + .get_frame_desc = ar0144_get_frame_desc, + .get_mbus_config = ar0144_get_mbus_config, + .enable_streams = ar0144_enable_streams, + .disable_streams = ar0144_disable_streams, +}; + +static const struct v4l2_subdev_ops ar0144_subdev_ops = { + .pad = &ar0144_subdev_pad_ops, +}; + +static const struct v4l2_subdev_internal_ops ar0144_subdev_internal_ops = { + .init_state = ar0144_entity_init_state, +}; + +static const struct media_entity_operations ar0144_entity_ops = { + .get_fwnode_pad = v4l2_subdev_get_fwnode_pad_1_to_1, +}; + +static int ar0144_init_subdev(struct ar0144 *sensor) +{ + struct i2c_client *client = to_i2c_client(sensor->dev); + struct v4l2_subdev *sd = &sensor->sd; + const struct v4l2_mbus_framefmt *format; + const struct ar0144_format_info *info; + struct v4l2_subdev_state *state; + int ret; + + v4l2_i2c_subdev_init(sd, client, &ar0144_subdev_ops); + + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + sd->internal_ops = &ar0144_subdev_internal_ops; + sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; + sd->entity.ops = &ar0144_entity_ops; + + sensor->pad.flags = MEDIA_PAD_FL_SOURCE; + + ret = media_entity_pads_init(&sd->entity, 1, &sensor->pad); + if (ret) + return ret; + + ret = ar0144_init_ctrls(sensor); + if (ret) + goto err_entity; + + sensor->sd.state_lock = sensor->ctrls.lock; + ret = v4l2_subdev_init_finalize(&sensor->sd); + if (ret) + goto err_ctrls; + + /* + * Update the link frequency, PLL configuration (including the pixel + * rate) and blanking controls. + */ + state = v4l2_subdev_lock_and_get_active_state(sd); + format = v4l2_subdev_state_get_format(state, 0); + info = ar0144_format_info(sensor, format->code, true); + + ar0144_update_link_freqs(sensor, info); + ar0144_pll_update(sensor, info); + ar0144_update_blanking(sensor, state); + + v4l2_subdev_unlock_state(state); + + return 0; + +err_ctrls: + v4l2_ctrl_handler_free(&sensor->ctrls); +err_entity: + media_entity_cleanup(&sd->entity); + return ret; +} + +static void ar0144_cleanup_subdev(struct ar0144 *sensor) +{ + v4l2_subdev_cleanup(&sensor->sd); + v4l2_ctrl_handler_free(&sensor->ctrls); + media_entity_cleanup(&sensor->sd.entity); +} + +/* ----------------------------------------------------------------------------- + * Power management + */ + +static int ar0144_power_on(struct ar0144 *sensor) +{ + u64 reset_delay; + long rate; + int ret; + + /* + * The sensor must be powered off for at least 100ms before being + * powered on again. + */ + if (sensor->off_time) { + u64 off_duration; + + off_duration = ktime_us_delta(ktime_get_boottime(), + sensor->off_time); + if (off_duration < 100000) + fsleep(100000 - off_duration); + } + + ret = regulator_bulk_enable(ARRAY_SIZE(sensor->supplies), + sensor->supplies); + if (ret) { + dev_err(sensor->dev, "Failed to enable regulators\n"); + return ret; + } + + ret = clk_prepare_enable(sensor->clk); + if (ret) { + regulator_bulk_disable(ARRAY_SIZE(sensor->supplies), + sensor->supplies); + dev_err(sensor->dev, "Failed to enable clock\n"); + return ret; + } + + /* + * The internal initialization time after hard reset is 160000 EXTCLK + * cycles. + */ + rate = clk_get_rate(sensor->clk); + reset_delay = DIV_ROUND_UP_ULL(160000ULL * USEC_PER_SEC, rate); + + if (sensor->reset) { + gpiod_set_value_cansleep(sensor->reset, 1); + fsleep(1000); + gpiod_set_value_cansleep(sensor->reset, 0); + } else { + cci_write(sensor->regmap, AR0144_RESET_REGISTER, AR0144_RESET, + NULL); + } + + fsleep(reset_delay); + + return 0; +} + +static void ar0144_power_off(struct ar0144 *sensor) +{ + regulator_bulk_disable(ARRAY_SIZE(sensor->supplies), sensor->supplies); + sensor->off_time = ktime_get_boottime(); + + clk_disable_unprepare(sensor->clk); + gpiod_set_value_cansleep(sensor->reset, 1); +} + +static int ar0144_runtime_resume(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ar0144 *sensor = to_ar0144(sd); + + return ar0144_power_on(sensor); +} + +static int ar0144_runtime_suspend(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ar0144 *sensor = to_ar0144(sd); + + ar0144_power_off(sensor); + + return 0; +} + +static const struct dev_pm_ops ar0144_pm_ops = { + RUNTIME_PM_OPS(ar0144_runtime_suspend, ar0144_runtime_resume, NULL) +}; + +/* ----------------------------------------------------------------------------- + * Probe & remove + */ + +static int ar0144_identify_device(struct ar0144 *sensor) +{ + const struct ar0144_model *model; + u64 customer_rev; + u64 chip_id; + int ret = 0; + + cci_read(sensor->regmap, AR0144_CHIP_VERSION_REG, &chip_id, &ret); + cci_read(sensor->regmap, AR0144_CUSTOMER_REV, &customer_rev, &ret); + + if (ret) { + dev_err(sensor->dev, "Failed to read chip ID: %d\n", ret); + return ret; + } + + if (chip_id != AR0144_CHIP_VERSION_CS && + chip_id != AR0144_CHIP_VERSION_AT) { + dev_err(sensor->dev, + "Wrong chip version 0x%04x (expected 0x%04x or 0x%04x)\n", + (u32)chip_id, AR0144_CHIP_VERSION_CS, + AR0144_CHIP_VERSION_AT); + return -ENODEV; + } + + switch (AR0144_CUSTOMER_REV_CFA(customer_rev)) { + default: + dev_warn(sensor->dev, + "Unknown CFA %u, defaulting to color\n", + (u32)AR0144_CUSTOMER_REV_CFA(customer_rev)); + fallthrough; + case AR0144_CUSTOMER_REV_CFA_COLOR: + model = &ar0144_model_color; + break; + case AR0144_CUSTOMER_REV_CFA_MONO: + model = &ar0144_model_mono; + break; + } + + if (sensor->model != model) + dev_warn(sensor->dev, + "Customer rev CFA doesn't match compatible string\n"); + + sensor->model = model; + + if (IS_ENABLED(CONFIG_DYNAMIC_DEBUG) || IS_ENABLED(DEBUG)) { + cci_read(sensor->regmap, AR0144_REVISION_NUMBER, &chip_id, NULL); + dev_dbg(sensor->dev, + "Sensor detected, CFA %s, CRA %u, OTPM r%u, silicon r%u, CREV r%u\n", + sensor->model->mono ? "mono" : "color", + (u32)AR0144_CUSTOMER_REV_CRA(customer_rev), + (u32)AR0144_REVISION_NUMBER_OTPM(chip_id), + (u32)AR0144_REVISION_NUMBER_SILICON(chip_id), + (u32)AR0144_REVISION_NUMBER_CREV(chip_id)); + } + + return 0; +} + +static int ar0144_parse_dt(struct ar0144 *sensor) +{ + struct v4l2_fwnode_endpoint *ep = &sensor->bus_cfg; + struct fwnode_handle *endpoint; + u64 valid_link_freqs = 0; + unsigned int nlanes; + unsigned int i, j; + int ret; + + endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(sensor->dev), NULL); + if (!endpoint) { + dev_err(sensor->dev, "Endpoint node not found\n"); + return -EINVAL; + } + + ep->bus_type = V4L2_MBUS_UNKNOWN; + ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, ep); + fwnode_handle_put(endpoint); + if (ret) { + dev_err(sensor->dev, "Parsing endpoint node failed\n"); + goto error; + } + + switch (ep->bus_type) { + case V4L2_MBUS_CSI2_DPHY: + /* Validate the number of data lanes. */ + nlanes = ep->bus.mipi_csi2.num_data_lanes; + if (nlanes != 1 && nlanes != 2) { + dev_err(sensor->dev, "Invalid data lanes: %d\n", nlanes); + ret = -EINVAL; + goto error; + } + break; + + default: + dev_err(sensor->dev, "Unsupported bus type %u\n", ep->bus_type); + goto error; + } + + /* Get and validate the link frequencies. */ + if (!ep->nr_of_link_frequencies) { + dev_err(sensor->dev, "link-frequency property not found in DT\n"); + ret = -EINVAL; + goto error; + } + + if (ep->nr_of_link_frequencies > 64) { + dev_err(sensor->dev, "Too many link-frequency entries\n"); + ret = -EINVAL; + goto error; + } + + for (i = 0; i < ARRAY_SIZE(ar0144_formats); ++i) { + const struct ar0144_format_info *info = &ar0144_formats[i]; + + for (j = 0; j < ep->nr_of_link_frequencies; ++j) { + u64 freq = ep->link_frequencies[j]; + struct ccs_pll pll; + + ret = ar0144_pll_calculate(sensor, &pll, freq, + info->bpp); + if (ret) + continue; + + sensor->valid_link_freqs[i] |= BIT(j); + valid_link_freqs |= BIT(j); + } + + if (!sensor->valid_link_freqs[i]) { + dev_warn(sensor->dev, + "No valid link frequency for %u bpp\n", + info->bpp); + continue; + } + + sensor->valid_formats |= BIT(i); + } + + if (!sensor->valid_formats) { + dev_err(sensor->dev, + "No valid link frequency found for any format\n"); + ret = -EINVAL; + goto error; + } + + for (i = 0; i < ep->nr_of_link_frequencies; ++i) { + if (!(valid_link_freqs & BIT(i))) + dev_warn(sensor->dev, + "Link frequency %llu not valid for any format\n", + ep->link_frequencies[i]); + } + + dev_dbg(sensor->dev, "Using %u data lanes and %u link frequencies\n", + nlanes, ep->nr_of_link_frequencies); + + return 0; + +error: + v4l2_fwnode_endpoint_free(&sensor->bus_cfg); + return ret; +} + +static const char * const ar0144_supply_name[AR0144_NUM_SUPPLIES] = { + "vaa", + "vddio", + "vdd", +}; + +static int ar0144_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct ar0144 *sensor; + unsigned int i; + int ret; + + sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); + if (!sensor) + return -ENOMEM; + + sensor->dev = dev; + sensor->model = device_get_match_data(sensor->dev); + + /* Acquire resources. */ + sensor->regmap = devm_cci_regmap_init_i2c(client, 16); + if (IS_ERR(sensor->regmap)) + return dev_err_probe(dev, PTR_ERR(sensor->regmap), + "Unable to initialize I2C\n"); + + sensor->clk = devm_clk_get(dev, NULL); + if (IS_ERR(sensor->clk)) + return dev_err_probe(dev, PTR_ERR(sensor->clk), + "Cannot get clock\n"); + + sensor->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(sensor->reset)) + return dev_err_probe(dev, PTR_ERR(sensor->reset), + "Cannot get reset gpio\n"); + + for (i = 0; i < ARRAY_SIZE(sensor->supplies); i++) + sensor->supplies[i].supply = ar0144_supply_name[i]; + + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(sensor->supplies), + sensor->supplies); + if (ret) + return dev_err_probe(dev, ret, "Cannot get supplies\n"); + + /* Parse the DT properties. */ + ret = ar0144_parse_dt(sensor); + if (ret) + return ret; + + /* + * Enable power management. The driver supports runtime PM, but needs to + * work when runtime PM is disabled in the kernel. To that end, power + * the sensor on manually here, identify it, and fully initialize it. + */ + ret = ar0144_power_on(sensor); + if (ret < 0) { + dev_err_probe(dev, ret, "Could not power on the device\n"); + goto err_dt; + } + + ret = ar0144_identify_device(sensor); + if (ret) + goto err_power; + + /* + * Enable runtime PM with autosuspend. As the device has been powered + * manually, mark it as active, and increase the usage count without + * resuming the device. + */ + pm_runtime_set_active(dev); + pm_runtime_get_noresume(dev); + pm_runtime_enable(dev); + pm_runtime_set_autosuspend_delay(dev, 1000); + pm_runtime_use_autosuspend(dev); + + /* Initialize and register the subdev. */ + ret = ar0144_init_subdev(sensor); + if (ret) { + dev_err(dev, "Subdev initialization error %d\n", ret); + goto err_pm; + } + + ret = v4l2_async_register_subdev_sensor(&sensor->sd); + if (ret) { + dev_err(dev, "Could not register V4L2 subdevice\n"); + goto err_subdev; + } + + /* + * Decrease the PM usage count. The device will get suspended after the + * autosuspend delay, turning the power off. + */ + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return 0; + +err_subdev: + ar0144_cleanup_subdev(sensor); +err_pm: + pm_runtime_disable(dev); + pm_runtime_put_noidle(dev); +err_power: + ar0144_power_off(sensor); +err_dt: + v4l2_fwnode_endpoint_free(&sensor->bus_cfg); + return ret; +} + +static void ar0144_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ar0144 *sensor = to_ar0144(sd); + + v4l2_async_unregister_subdev(&sensor->sd); + ar0144_cleanup_subdev(sensor); + v4l2_fwnode_endpoint_free(&sensor->bus_cfg); + + /* + * Disable runtime PM. In case runtime PM is disabled in the kernel, + * make sure to turn power off manually. + */ + pm_runtime_disable(sensor->dev); + if (!pm_runtime_status_suspended(sensor->dev)) + ar0144_power_off(sensor); + pm_runtime_set_suspended(sensor->dev); +} + +static const struct of_device_id ar0144_of_match[] = { + { .compatible = "onnn,ar0144c", &ar0144_model_color }, + { .compatible = "onnn,ar0144m", &ar0144_model_mono }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ar0144_of_match); + +static struct i2c_driver ar0144_i2c_driver = { + .driver = { + .name = "ar0144", + .of_match_table = ar0144_of_match, + .pm = pm_ptr(&ar0144_pm_ops), + }, + .probe = ar0144_probe, + .remove = ar0144_remove, +}; + +module_i2c_driver(ar0144_i2c_driver); + +MODULE_DESCRIPTION("onsemi AR0144 Camera Sensor Driver"); +MODULE_LICENSE("GPL");