* [PATCH v3 2/2] media: i2c: IMX296 camera sensor driver
2022-08-23 0:58 [PATCH v3 0/2] media: i2c: IMX296 camera sensor support Laurent Pinchart
2022-08-23 0:58 ` [PATCH v3 1/2] dt-bindings: media: i2c: Add IMX296 CMOS sensor binding Laurent Pinchart
@ 2022-08-23 0:58 ` Laurent Pinchart
1 sibling, 0 replies; 3+ messages in thread
From: Laurent Pinchart @ 2022-08-23 0:58 UTC (permalink / raw)
To: linux-media; +Cc: Manivannan Sadhasivam, Sakari Ailus
The IMX296LLR is a monochrome 1.60MP CMOS sensor from Sony. The driver
supports cropping and binning (but not both at the same time due to
hardware limitations) and exposure, gain, vertical blanking and test
pattern controls.
Preliminary support is also included for the color IMX296LQR sensor.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
Changes since v2:
- Support forcing model through compatible string
- Move subdev init/cleanup to separate functions
- Use V4L2 subdev active state
- Switch MODULE_LICENSE from "GPL v2" to "GPL"
- Select VIDEO_V4L2_SUBDEV_API instead of depends
- Fix Kconfig dependencies
- Fix white space alignment
Changes since v1:
- Use help instead of ---help--- in Kconfig
- Print error message on I2C write failure
- Fix number of controls in v4l2_ctrl_handler_init() call
- Replace hardcoded number with ARRAY_SIZE()
- Initialize structures at declaration time
- Use .probe_new() and remove I2C device table
- Drop of_match_ptr()
- Fix module description
- Fix test pattern configuration
- Fix power on
- Read sensor temperature at probe time
- Set opaque background in test patterns
- Initialize format field and colorspace
- Reorder subdev pad operations
- Create controls for fwnode properties
- Expose crop bounds and defaults
- Add V4L2_CID_HBLANK control
- Replace gain control with analogue gain
- Rename local variable 'imx' to 'sensor'
- Protect format and crop with a mutex
- Consistently access struct device through sensor->dev
- Use runtime PM
- Use three power supplies
- Fix number of controls when initializing handler
- Fix error message for reset GPIO get failure
- Switch to V4L2 subdev state API
- Use dev_err_probe()
---
MAINTAINERS | 1 +
drivers/media/i2c/Kconfig | 13 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/imx296.c | 1174 ++++++++++++++++++++++++++++++++++++
4 files changed, 1189 insertions(+)
create mode 100644 drivers/media/i2c/imx296.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 34e5b6e43f88..6e88f48dfba6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18966,6 +18966,7 @@ L: linux-media@vger.kernel.org
S: Maintained
T: git git://linuxtv.org/media_tree.git
F: Documentation/devicetree/bindings/media/i2c/sony,imx296.yaml
+F: drivers/media/i2c/imx296.c
SONY IMX319 SENSOR DRIVER
M: Bingbu Cao <bingbu.cao@intel.com>
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 7806d4b81716..a3bd2a3cb212 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -162,6 +162,19 @@ config VIDEO_IMX290
To compile this driver as a module, choose M here: the
module will be called imx290.
+config VIDEO_IMX296
+ tristate "Sony IMX296 sensor support"
+ depends on I2C && VIDEO_DEV
+ select MEDIA_CONTROLLER
+ select V4L2_FWNODE
+ select VIDEO_V4L2_SUBDEV_API
+ help
+ This is a Video4Linux2 sensor driver for the Sony
+ IMX296 camera.
+
+ To compile this driver as a module, choose M here: the
+ module will be called imx296.
+
config VIDEO_IMX319
tristate "Sony IMX319 sensor support"
depends on I2C && VIDEO_DEV
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index 0a2933103dd9..440a3edf9a3a 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_VIDEO_IMX219) += imx219.o
obj-$(CONFIG_VIDEO_IMX258) += imx258.o
obj-$(CONFIG_VIDEO_IMX274) += imx274.o
obj-$(CONFIG_VIDEO_IMX290) += imx290.o
+obj-$(CONFIG_VIDEO_IMX296) += imx296.o
obj-$(CONFIG_VIDEO_IMX319) += imx319.o
obj-$(CONFIG_VIDEO_IMX334) += imx334.o
obj-$(CONFIG_VIDEO_IMX335) += imx335.o
diff --git a/drivers/media/i2c/imx296.c b/drivers/media/i2c/imx296.c
new file mode 100644
index 000000000000..09b75fd5edbb
--- /dev/null
+++ b/drivers/media/i2c/imx296.c
@@ -0,0 +1,1174 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for IMX296 CMOS Image Sensor from Sony
+ *
+ * Copyright 2019 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#define IMX296_PIXEL_ARRAY_WIDTH 1456
+#define IMX296_PIXEL_ARRAY_HEIGHT 1088
+
+#define IMX296_REG_8BIT(n) ((1 << 16) | (n))
+#define IMX296_REG_16BIT(n) ((2 << 16) | (n))
+#define IMX296_REG_24BIT(n) ((3 << 16) | (n))
+#define IMX296_REG_SIZE_SHIFT 16
+#define IMX296_REG_ADDR_MASK 0xffff
+
+#define IMX296_CTRL00 IMX296_REG_8BIT(0x3000)
+#define IMX296_CTRL00_STANDBY BIT(0)
+#define IMX296_CTRL08 IMX296_REG_8BIT(0x3008)
+#define IMX296_CTRL08_REGHOLD BIT(0)
+#define IMX296_CTRL0A IMX296_REG_8BIT(0x300a)
+#define IMX296_CTRL0A_XMSTA BIT(0)
+#define IMX296_CTRL0B IMX296_REG_8BIT(0x300b)
+#define IMX296_CTRL0B_TRIGEN BIT(0)
+#define IMX296_CTRL0D IMX296_REG_8BIT(0x300d)
+#define IMX296_CTRL0D_WINMODE_ALL (0 << 0)
+#define IMX296_CTRL0D_WINMODE_FD_BINNING (2 << 0)
+#define IMX296_CTRL0D_HADD_ON_BINNING BIT(5)
+#define IMX296_CTRL0D_SAT_CNT BIT(6)
+#define IMX296_CTRL0E IMX296_REG_8BIT(0x300e)
+#define IMX296_CTRL0E_VREVERSE BIT(0)
+#define IMX296_CTRL0E_HREVERSE BIT(1)
+#define IMX296_VMAX IMX296_REG_24BIT(0x3010)
+#define IMX296_HMAX IMX296_REG_16BIT(0x3014)
+#define IMX296_TMDCTRL IMX296_REG_8BIT(0x301d)
+#define IMX296_TMDCTRL_LATCH BIT(0)
+#define IMX296_TMDOUT IMX296_REG_16BIT(0x301e)
+#define IMX296_TMDOUT_MASK 0x3ff
+#define IMX296_WDSEL IMX296_REG_8BIT(0x3021)
+#define IMX296_WDSEL_NORMAL (0 << 0)
+#define IMX296_WDSEL_MULTI_2 (1 << 0)
+#define IMX296_WDSEL_MULTI_4 (3 << 0)
+#define IMX296_BLKLEVELAUTO IMX296_REG_8BIT(0x3022)
+#define IMX296_BLKLEVELAUTO_ON 0x01
+#define IMX296_BLKLEVELAUTO_OFF 0xf0
+#define IMX296_SST IMX296_REG_8BIT(0x3024)
+#define IMX296_SST_EN BIT(0)
+#define IMX296_CTRLTOUT IMX296_REG_8BIT(0x3026)
+#define IMX296_CTRLTOUT_TOUT1SEL_LOW (0 << 0)
+#define IMX296_CTRLTOUT_TOUT1SEL_PULSE (3 << 0)
+#define IMX296_CTRLTOUT_TOUT2SEL_LOW (0 << 2)
+#define IMX296_CTRLTOUT_TOUT2SEL_PULSE (3 << 2)
+#define IMX296_CTRLTRIG IMX296_REG_8BIT(0x3029)
+#define IMX296_CTRLTRIG_TOUT1_SEL_LOW (0 << 0)
+#define IMX296_CTRLTRIG_TOUT1_SEL_PULSE1 (1 << 0)
+#define IMX296_CTRLTRIG_TOUT2_SEL_LOW (0 << 4)
+#define IMX296_CTRLTRIG_TOUT2_SEL_PULSE2 (2 << 4)
+#define IMX296_SYNCSEL IMX296_REG_8BIT(0x3036)
+#define IMX296_SYNCSEL_NORMAL 0xc0
+#define IMX296_SYNCSEL_HIZ 0xf0
+#define IMX296_PULSE1 IMX296_REG_8BIT(0x306d)
+#define IMX296_PULSE1_EN_NOR BIT(0)
+#define IMX296_PULSE1_EN_TRIG BIT(1)
+#define IMX296_PULSE1_POL_HIGH (0 << 2)
+#define IMX296_PULSE1_POL_LOW (1 << 2)
+#define IMX296_PULSE1_UP IMX296_REG_24BIT(0x3070)
+#define IMX296_PULSE1_DN IMX296_REG_24BIT(0x3074)
+#define IMX296_PULSE2 IMX296_REG_8BIT(0x3079)
+#define IMX296_PULSE2_EN_NOR BIT(0)
+#define IMX296_PULSE2_EN_TRIG BIT(1)
+#define IMX296_PULSE2_POL_HIGH (0 << 2)
+#define IMX296_PULSE2_POL_LOW (1 << 2)
+#define IMX296_PULSE2_UP IMX296_REG_24BIT(0x307c)
+#define IMX296_PULSE2_DN IMX296_REG_24BIT(0x3080)
+#define IMX296_INCKSEL(n) IMX296_REG_8BIT(0x3089 + (n))
+#define IMX296_SHS1 IMX296_REG_24BIT(0x308d)
+#define IMX296_SHS2 IMX296_REG_24BIT(0x3090)
+#define IMX296_SHS3 IMX296_REG_24BIT(0x3094)
+#define IMX296_SHS4 IMX296_REG_24BIT(0x3098)
+#define IMX296_VBLANKLP IMX296_REG_8BIT(0x309c)
+#define IMX296_VBLANKLP_NORMAL 0x04
+#define IMX296_VBLANKLP_LOW_POWER 0x2c
+#define IMX296_EXP_CNT IMX296_REG_8BIT(0x30a3)
+#define IMX296_EXP_CNT_RESET BIT(0)
+#define IMX296_EXP_MAX IMX296_REG_16BIT(0x30a6)
+#define IMX296_VINT IMX296_REG_8BIT(0x30aa)
+#define IMX296_VINT_EN BIT(0)
+#define IMX296_LOWLAGTRG IMX296_REG_8BIT(0x30ae)
+#define IMX296_LOWLAGTRG_FAST BIT(0)
+#define IMX296_I2CCTRL IMX296_REG_8BIT(0x30ef)
+#define IMX296_I2CCTRL_I2CACKEN BIT(0)
+
+#define IMX296_SENSOR_INFO IMX296_REG_16BIT(0x3148)
+#define IMX296_SENSOR_INFO_MONO BIT(15)
+#define IMX296_SENSOR_INFO_IMX296LQ 0x4a00
+#define IMX296_SENSOR_INFO_IMX296LL 0xca00
+#define IMX296_S_SHSA IMX296_REG_16BIT(0x31ca)
+#define IMX296_S_SHSB IMX296_REG_16BIT(0x31d2)
+/*
+ * Registers 0x31c8 to 0x31cd, 0x31d0 to 0x31d5, 0x31e2, 0x31e3, 0x31ea and
+ * 0x31eb are related to exposure mode but otherwise not documented.
+ */
+
+#define IMX296_GAINCTRL IMX296_REG_8BIT(0x3200)
+#define IMX296_GAINCTRL_WD_GAIN_MODE_NORMAL 0x01
+#define IMX296_GAINCTRL_WD_GAIN_MODE_MULTI 0x41
+#define IMX296_GAIN IMX296_REG_16BIT(0x3204)
+#define IMX296_GAIN_MIN 0
+#define IMX296_GAIN_MAX 480
+#define IMX296_GAIN1 IMX296_REG_16BIT(0x3208)
+#define IMX296_GAIN2 IMX296_REG_16BIT(0x320c)
+#define IMX296_GAIN3 IMX296_REG_16BIT(0x3210)
+#define IMX296_GAINDLY IMX296_REG_8BIT(0x3212)
+#define IMX296_GAINDLY_NONE 0x08
+#define IMX296_GAINDLY_1FRAME 0x09
+#define IMX296_PGCTRL IMX296_REG_8BIT(0x3238)
+#define IMX296_PGCTRL_REGEN BIT(0)
+#define IMX296_PGCTRL_THRU BIT(1)
+#define IMX296_PGCTRL_CLKEN BIT(2)
+#define IMX296_PGCTRL_MODE(n) ((n) << 3)
+#define IMX296_PGHPOS IMX296_REG_16BIT(0x3239)
+#define IMX296_PGVPOS IMX296_REG_16BIT(0x323c)
+#define IMX296_PGHPSTEP IMX296_REG_8BIT(0x323e)
+#define IMX296_PGVPSTEP IMX296_REG_8BIT(0x323f)
+#define IMX296_PGHPNUM IMX296_REG_8BIT(0x3240)
+#define IMX296_PGVPNUM IMX296_REG_8BIT(0x3241)
+#define IMX296_PGDATA1 IMX296_REG_16BIT(0x3244)
+#define IMX296_PGDATA2 IMX296_REG_16BIT(0x3246)
+#define IMX296_PGHGSTEP IMX296_REG_8BIT(0x3249)
+#define IMX296_BLKLEVEL IMX296_REG_16BIT(0x3254)
+
+#define IMX296_FID0_ROI IMX296_REG_8BIT(0x3300)
+#define IMX296_FID0_ROIH1ON BIT(0)
+#define IMX296_FID0_ROIV1ON BIT(1)
+#define IMX296_FID0_ROIPH1 IMX296_REG_16BIT(0x3310)
+#define IMX296_FID0_ROIPV1 IMX296_REG_16BIT(0x3312)
+#define IMX296_FID0_ROIWH1 IMX296_REG_16BIT(0x3314)
+#define IMX296_FID0_ROIWH1_MIN 80
+#define IMX296_FID0_ROIWV1 IMX296_REG_16BIT(0x3316)
+#define IMX296_FID0_ROIWV1_MIN 4
+
+#define IMX296_CM_HSST_STARTTMG IMX296_REG_16BIT(0x4018)
+#define IMX296_CM_HSST_ENDTMG IMX296_REG_16BIT(0x401a)
+#define IMX296_DA_HSST_STARTTMG IMX296_REG_16BIT(0x404d)
+#define IMX296_DA_HSST_ENDTMG IMX296_REG_16BIT(0x4050)
+#define IMX296_LM_HSST_STARTTMG IMX296_REG_16BIT(0x4094)
+#define IMX296_LM_HSST_ENDTMG IMX296_REG_16BIT(0x4096)
+#define IMX296_SST_SIEASTA1_SET IMX296_REG_8BIT(0x40c9)
+#define IMX296_SST_SIEASTA1PRE_1U IMX296_REG_16BIT(0x40cc)
+#define IMX296_SST_SIEASTA1PRE_1D IMX296_REG_16BIT(0x40ce)
+#define IMX296_SST_SIEASTA1PRE_2U IMX296_REG_16BIT(0x40d0)
+#define IMX296_SST_SIEASTA1PRE_2D IMX296_REG_16BIT(0x40d2)
+#define IMX296_HSST IMX296_REG_8BIT(0x40dc)
+#define IMX296_HSST_EN BIT(2)
+
+#define IMX296_CKREQSEL IMX296_REG_8BIT(0x4101)
+#define IMX296_CKREQSEL_HS BIT(2)
+#define IMX296_GTTABLENUM IMX296_REG_8BIT(0x4114)
+#define IMX296_CTRL418C IMX296_REG_8BIT(0x418c)
+
+struct imx296_clk_params {
+ unsigned int freq;
+ u8 incksel[4];
+ u8 ctrl418c;
+};
+
+static const struct imx296_clk_params imx296_clk_params[] = {
+ { 37125000, { 0x80, 0x0b, 0x80, 0x08 }, 116 },
+ { 54000000, { 0xb0, 0x0f, 0xb0, 0x0c }, 168 },
+ { 74250000, { 0x80, 0x0f, 0x80, 0x0c }, 232 },
+};
+
+static const char * const imx296_supply_names[] = {
+ "dvdd",
+ "ovdd",
+ "avdd",
+};
+
+struct imx296 {
+ struct device *dev;
+ struct clk *clk;
+ struct regulator_bulk_data supplies[ARRAY_SIZE(imx296_supply_names)];
+ struct gpio_desc *reset;
+ struct regmap *regmap;
+
+ const struct imx296_clk_params *clk_params;
+ bool mono;
+
+ bool streaming;
+
+ struct v4l2_subdev subdev;
+ struct media_pad pad;
+
+ struct v4l2_ctrl_handler ctrls;
+ struct v4l2_ctrl *hblank;
+ struct v4l2_ctrl *vblank;
+};
+
+static inline struct imx296 *to_imx296(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct imx296, subdev);
+}
+
+static int imx296_read(struct imx296 *sensor, u32 addr)
+{
+ u8 data[3] = { 0, 0, 0 };
+ int ret;
+
+ ret = regmap_raw_read(sensor->regmap, addr & IMX296_REG_ADDR_MASK, data,
+ (addr >> IMX296_REG_SIZE_SHIFT) & 3);
+ if (ret < 0)
+ return ret;
+
+ return (data[2] << 16) | (data[1] << 8) | data[0];
+}
+
+static int imx296_write(struct imx296 *sensor, u32 addr, u32 value, int *err)
+{
+ u8 data[3] = { value & 0xff, (value >> 8) & 0xff, value >> 16 };
+ int ret;
+
+ if (err && *err)
+ return *err;
+
+ ret = regmap_raw_write(sensor->regmap, addr & IMX296_REG_ADDR_MASK,
+ data, (addr >> IMX296_REG_SIZE_SHIFT) & 3);
+ if (ret < 0) {
+ dev_err(sensor->dev, "%u-bit write to 0x%04x failed: %d\n",
+ ((addr >> IMX296_REG_SIZE_SHIFT) & 3) * 8,
+ addr & IMX296_REG_ADDR_MASK, ret);
+ if (err)
+ *err = ret;
+ }
+
+ return ret;
+}
+
+static int imx296_power_on(struct imx296 *sensor)
+{
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(sensor->supplies),
+ sensor->supplies);
+ if (ret < 0)
+ return ret;
+
+ udelay(1);
+
+ ret = gpiod_direction_output(sensor->reset, 0);
+ if (ret < 0)
+ goto err_supply;
+
+ udelay(1);
+
+ ret = clk_prepare_enable(sensor->clk);
+ if (ret < 0)
+ goto err_reset;
+
+ /*
+ * The documentation doesn't explicitly say how much time is required
+ * after providing a clock and before starting I2C communication. It
+ * mentions a delay of 20µs in 4-wire mode, but tests showed that a
+ * delay of 100µs resulted in I2C communication failures, while 500µs
+ * seems to be enough. Be conservative.
+ */
+ usleep_range(1000, 2000);
+
+ return 0;
+
+err_reset:
+ gpiod_direction_output(sensor->reset, 1);
+err_supply:
+ regulator_bulk_disable(ARRAY_SIZE(sensor->supplies), sensor->supplies);
+ return ret;
+}
+
+static void imx296_power_off(struct imx296 *sensor)
+{
+ clk_disable_unprepare(sensor->clk);
+ gpiod_direction_output(sensor->reset, 1);
+ regulator_bulk_disable(ARRAY_SIZE(sensor->supplies), sensor->supplies);
+}
+
+/* -----------------------------------------------------------------------------
+ * Controls
+ */
+
+static const char * const imx296_test_pattern_menu[] = {
+ "Disabled",
+ "Multiple Pixels",
+ "Sequence 1",
+ "Sequence 2",
+ "Gradient",
+ "Row",
+ "Column",
+ "Cross",
+ "Stripe",
+ "Checks",
+};
+
+static int imx296_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct imx296 *sensor = container_of(ctrl->handler, struct imx296, ctrls);
+ const struct v4l2_mbus_framefmt *format;
+ struct v4l2_subdev_state *state;
+ unsigned int vmax;
+ int ret = 0;
+
+ if (!sensor->streaming)
+ return 0;
+
+ state = v4l2_subdev_get_locked_active_state(&sensor->subdev);
+ format = v4l2_subdev_get_pad_format(&sensor->subdev, state, 0);
+
+ switch (ctrl->id) {
+ case V4L2_CID_EXPOSURE:
+ /* Clamp the exposure value to VMAX. */
+ vmax = format->height + sensor->vblank->cur.val;
+ ctrl->val = min_t(int, ctrl->val, vmax);
+ imx296_write(sensor, IMX296_SHS1, vmax - ctrl->val, &ret);
+ break;
+
+ case V4L2_CID_ANALOGUE_GAIN:
+ imx296_write(sensor, IMX296_GAIN, ctrl->val, &ret);
+ break;
+
+ case V4L2_CID_VBLANK:
+ imx296_write(sensor, IMX296_VMAX, format->height + ctrl->val,
+ &ret);
+ break;
+
+ case V4L2_CID_TEST_PATTERN:
+ if (ctrl->val) {
+ imx296_write(sensor, IMX296_PGHPOS, 8, &ret);
+ imx296_write(sensor, IMX296_PGVPOS, 8, &ret);
+ imx296_write(sensor, IMX296_PGHPSTEP, 8, &ret);
+ imx296_write(sensor, IMX296_PGVPSTEP, 8, &ret);
+ imx296_write(sensor, IMX296_PGHPNUM, 100, &ret);
+ imx296_write(sensor, IMX296_PGVPNUM, 100, &ret);
+ imx296_write(sensor, IMX296_PGDATA1, 0x300, &ret);
+ imx296_write(sensor, IMX296_PGDATA2, 0x100, &ret);
+ imx296_write(sensor, IMX296_PGHGSTEP, 0, &ret);
+ imx296_write(sensor, IMX296_BLKLEVEL, 0, &ret);
+ imx296_write(sensor, IMX296_BLKLEVELAUTO,
+ IMX296_BLKLEVELAUTO_OFF, &ret);
+ imx296_write(sensor, IMX296_PGCTRL,
+ IMX296_PGCTRL_REGEN |
+ IMX296_PGCTRL_CLKEN |
+ IMX296_PGCTRL_MODE(ctrl->val - 1), &ret);
+ } else {
+ imx296_write(sensor, IMX296_PGCTRL,
+ IMX296_PGCTRL_CLKEN, &ret);
+ imx296_write(sensor, IMX296_BLKLEVEL, 0x3c, &ret);
+ imx296_write(sensor, IMX296_BLKLEVELAUTO,
+ IMX296_BLKLEVELAUTO_ON, &ret);
+ }
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops imx296_ctrl_ops = {
+ .s_ctrl = imx296_s_ctrl,
+};
+
+static int imx296_ctrls_init(struct imx296 *sensor)
+{
+ struct v4l2_fwnode_device_properties props;
+ unsigned int hblank;
+ int ret;
+
+ ret = v4l2_fwnode_device_parse(sensor->dev, &props);
+ if (ret < 0)
+ return ret;
+
+ v4l2_ctrl_handler_init(&sensor->ctrls, 9);
+
+ v4l2_ctrl_new_std(&sensor->ctrls, &imx296_ctrl_ops,
+ V4L2_CID_EXPOSURE, 1, 1048575, 1, 1104);
+ v4l2_ctrl_new_std(&sensor->ctrls, &imx296_ctrl_ops,
+ V4L2_CID_ANALOGUE_GAIN, IMX296_GAIN_MIN,
+ IMX296_GAIN_MAX, 1, IMX296_GAIN_MIN);
+
+ /*
+ * Horizontal blanking is controlled through the HMAX register, which
+ * contains a line length in INCK clock units. The INCK frequency is
+ * fixed to 74.25 MHz. The HMAX value is currently fixed to 1100,
+ * convert it to a number of pixels based on the nominal pixel rate.
+ */
+ hblank = 1100 * 1188000000ULL / 10 / 74250000
+ - IMX296_PIXEL_ARRAY_WIDTH;
+ sensor->hblank = v4l2_ctrl_new_std(&sensor->ctrls, &imx296_ctrl_ops,
+ V4L2_CID_HBLANK, hblank, hblank, 1,
+ hblank);
+ if (sensor->hblank)
+ sensor->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ sensor->vblank = v4l2_ctrl_new_std(&sensor->ctrls, &imx296_ctrl_ops,
+ V4L2_CID_VBLANK, 30,
+ 1048575 - IMX296_PIXEL_ARRAY_HEIGHT,
+ 1, 30);
+ /*
+ * The sensor calculates the MIPI timings internally to achieve a bit
+ * rate between 1122 and 1198 Mbps. The exact value is unfortunately not
+ * reported, at least according to the documentation. Report a nominal
+ * rate of 1188 Mbps as that is used by the datasheet in multiple
+ * examples.
+ */
+ v4l2_ctrl_new_std(&sensor->ctrls, NULL, V4L2_CID_PIXEL_RATE,
+ 1122000000 / 10, 1198000000 / 10, 1, 1188000000 / 10);
+ v4l2_ctrl_new_std_menu_items(&sensor->ctrls, &imx296_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(imx296_test_pattern_menu) - 1,
+ 0, 0, imx296_test_pattern_menu);
+
+ v4l2_ctrl_new_fwnode_properties(&sensor->ctrls, &imx296_ctrl_ops,
+ &props);
+
+ if (sensor->ctrls.error) {
+ dev_err(sensor->dev, "failed to add controls (%d)\n",
+ sensor->ctrls.error);
+ v4l2_ctrl_handler_free(&sensor->ctrls);
+ return sensor->ctrls.error;
+ }
+
+ sensor->subdev.ctrl_handler = &sensor->ctrls;
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdev Operations
+ */
+
+/*
+ * This table is extracted from vendor data that is entirely undocumented. The
+ * first register write is required to activate the CSI-2 output. The other
+ * entries may or may not be optional?
+ */
+static const struct {
+ unsigned int reg;
+ unsigned int value;
+} imx296_init_table[] = {
+ { IMX296_REG_8BIT(0x3005), 0xf0 },
+ { IMX296_REG_8BIT(0x309e), 0x04 },
+ { IMX296_REG_8BIT(0x30a0), 0x04 },
+ { IMX296_REG_8BIT(0x30a1), 0x3c },
+ { IMX296_REG_8BIT(0x30a4), 0x5f },
+ { IMX296_REG_8BIT(0x30a8), 0x91 },
+ { IMX296_REG_8BIT(0x30ac), 0x28 },
+ { IMX296_REG_8BIT(0x30af), 0x09 },
+ { IMX296_REG_8BIT(0x30df), 0x00 },
+ { IMX296_REG_8BIT(0x3165), 0x00 },
+ { IMX296_REG_8BIT(0x3169), 0x10 },
+ { IMX296_REG_8BIT(0x316a), 0x02 },
+ { IMX296_REG_8BIT(0x31c8), 0xf3 }, /* Exposure-related */
+ { IMX296_REG_8BIT(0x31d0), 0xf4 }, /* Exposure-related */
+ { IMX296_REG_8BIT(0x321a), 0x00 },
+ { IMX296_REG_8BIT(0x3226), 0x02 },
+ { IMX296_REG_8BIT(0x3256), 0x01 },
+ { IMX296_REG_8BIT(0x3541), 0x72 },
+ { IMX296_REG_8BIT(0x3516), 0x77 },
+ { IMX296_REG_8BIT(0x350b), 0x7f },
+ { IMX296_REG_8BIT(0x3758), 0xa3 },
+ { IMX296_REG_8BIT(0x3759), 0x00 },
+ { IMX296_REG_8BIT(0x375a), 0x85 },
+ { IMX296_REG_8BIT(0x375b), 0x00 },
+ { IMX296_REG_8BIT(0x3832), 0xf5 },
+ { IMX296_REG_8BIT(0x3833), 0x00 },
+ { IMX296_REG_8BIT(0x38a2), 0xf6 },
+ { IMX296_REG_8BIT(0x38a3), 0x00 },
+ { IMX296_REG_8BIT(0x3a00), 0x80 },
+ { IMX296_REG_8BIT(0x3d48), 0xa3 },
+ { IMX296_REG_8BIT(0x3d49), 0x00 },
+ { IMX296_REG_8BIT(0x3d4a), 0x85 },
+ { IMX296_REG_8BIT(0x3d4b), 0x00 },
+ { IMX296_REG_8BIT(0x400e), 0x58 },
+ { IMX296_REG_8BIT(0x4014), 0x1c },
+ { IMX296_REG_8BIT(0x4041), 0x2a },
+ { IMX296_REG_8BIT(0x40a2), 0x06 },
+ { IMX296_REG_8BIT(0x40c1), 0xf6 },
+ { IMX296_REG_8BIT(0x40c7), 0x0f },
+ { IMX296_REG_8BIT(0x40c8), 0x00 },
+ { IMX296_REG_8BIT(0x4174), 0x00 },
+};
+
+static int imx296_setup(struct imx296 *sensor, struct v4l2_subdev_state *state)
+{
+ const struct v4l2_mbus_framefmt *format;
+ const struct v4l2_rect *crop;
+ unsigned int i;
+ int ret = 0;
+
+ format = v4l2_subdev_get_pad_format(&sensor->subdev, state, 0);
+ crop = v4l2_subdev_get_pad_crop(&sensor->subdev, state, 0);
+
+ for (i = 0; i < ARRAY_SIZE(imx296_init_table); ++i)
+ imx296_write(sensor, imx296_init_table[i].reg,
+ imx296_init_table[i].value, &ret);
+
+ if (crop->width != IMX296_PIXEL_ARRAY_WIDTH ||
+ crop->height != IMX296_PIXEL_ARRAY_HEIGHT) {
+ imx296_write(sensor, IMX296_FID0_ROI,
+ IMX296_FID0_ROIH1ON | IMX296_FID0_ROIV1ON, &ret);
+ imx296_write(sensor, IMX296_FID0_ROIPH1, crop->left, &ret);
+ imx296_write(sensor, IMX296_FID0_ROIPV1, crop->top, &ret);
+ imx296_write(sensor, IMX296_FID0_ROIWH1, crop->width, &ret);
+ imx296_write(sensor, IMX296_FID0_ROIWV1, crop->height, &ret);
+ } else {
+ imx296_write(sensor, IMX296_FID0_ROI, 0, &ret);
+ }
+
+ imx296_write(sensor, IMX296_CTRL0D,
+ (crop->width != format->width ?
+ IMX296_CTRL0D_HADD_ON_BINNING : 0) |
+ (crop->height != format->height ?
+ IMX296_CTRL0D_WINMODE_FD_BINNING : 0),
+ &ret);
+
+ /*
+ * HMAX and VMAX configure horizontal and vertical blanking by
+ * specifying the total line time and frame time respectively. The line
+ * time is specified in operational clock units (which appears to be the
+ * output of an internal PLL, fixed at 74.25 MHz regardless of the
+ * exernal clock frequency), while the frame time is specified as a
+ * number of lines.
+ *
+ * In the vertical direction the sensor outputs the following:
+ *
+ * - one line for the FS packet
+ * - two lines of embedded data (DT 0x12)
+ * - six null lines (DT 0x10)
+ * - four lines of vertical effective optical black (DT 0x37)
+ * - 8 to 1088 lines of active image data (RAW10, DT 0x2b)
+ * - one line for the FE packet
+ * - 16 or more lines of vertical blanking
+ */
+ imx296_write(sensor, IMX296_HMAX, 1100, &ret);
+ imx296_write(sensor, IMX296_VMAX,
+ format->height + sensor->vblank->cur.val, &ret);
+
+ for (i = 0; i < ARRAY_SIZE(sensor->clk_params->incksel); ++i)
+ imx296_write(sensor, IMX296_INCKSEL(i),
+ sensor->clk_params->incksel[i], &ret);
+ imx296_write(sensor, IMX296_GTTABLENUM, 0xc5, &ret);
+ imx296_write(sensor, IMX296_CTRL418C, sensor->clk_params->ctrl418c,
+ &ret);
+
+ imx296_write(sensor, IMX296_GAINDLY, IMX296_GAINDLY_NONE, &ret);
+ imx296_write(sensor, IMX296_BLKLEVEL, 0x03c, &ret);
+
+ return ret;
+}
+
+static int imx296_stream_on(struct imx296 *sensor)
+{
+ int ret = 0;
+
+ imx296_write(sensor, IMX296_CTRL00, 0, &ret);
+ usleep_range(2000, 5000);
+ imx296_write(sensor, IMX296_CTRL0A, 0, &ret);
+
+ return ret;
+}
+
+static int imx296_stream_off(struct imx296 *sensor)
+{
+ int ret = 0;
+
+ imx296_write(sensor, IMX296_CTRL0A, IMX296_CTRL0A_XMSTA, &ret);
+ imx296_write(sensor, IMX296_CTRL00, IMX296_CTRL00_STANDBY, &ret);
+
+ return ret;
+}
+
+static int imx296_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct imx296 *sensor = to_imx296(sd);
+ struct v4l2_subdev_state *state;
+ int ret;
+
+ state = v4l2_subdev_lock_and_get_active_state(sd);
+
+ if (!enable) {
+ ret = imx296_stream_off(sensor);
+
+ pm_runtime_mark_last_busy(sensor->dev);
+ pm_runtime_put_autosuspend(sensor->dev);
+
+ sensor->streaming = false;
+
+ goto unlock;
+ }
+
+ ret = pm_runtime_resume_and_get(sensor->dev);
+ if (ret < 0)
+ goto unlock;
+
+ ret = imx296_setup(sensor, state);
+ if (ret < 0)
+ goto err_pm;
+
+ /*
+ * Set streaming to true to ensure __v4l2_ctrl_handler_setup() will set
+ * the controls. The flag is reset to false further down if an error
+ * occurs.
+ */
+ sensor->streaming = true;
+
+ ret = __v4l2_ctrl_handler_setup(&sensor->ctrls);
+ if (ret < 0)
+ goto err_pm;
+
+ ret = imx296_stream_on(sensor);
+ if (ret)
+ goto err_pm;
+
+unlock:
+ v4l2_subdev_unlock_state(state);
+
+ return ret;
+
+err_pm:
+ /*
+ * In case of error, turn the power off synchronously as the device
+ * likely has no other chance to recover.
+ */
+ pm_runtime_put_sync(sensor->dev);
+ sensor->streaming = false;
+
+ goto unlock;
+}
+
+static int imx296_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct imx296 *sensor = to_imx296(sd);
+
+ if (code->index != 0)
+ return -EINVAL;
+
+ code->code = sensor->mono ? MEDIA_BUS_FMT_Y10_1X10
+ : MEDIA_BUS_FMT_SBGGR10_1X10;
+
+ return 0;
+}
+
+static int imx296_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ const struct v4l2_mbus_framefmt *format;
+
+ format = v4l2_subdev_get_pad_format(sd, state, fse->pad);
+
+ if (fse->index >= 2 || fse->code != format->code)
+ return -EINVAL;
+
+ fse->min_width = IMX296_PIXEL_ARRAY_WIDTH / (fse->index + 1);
+ fse->max_width = fse->min_width;
+ fse->min_height = IMX296_PIXEL_ARRAY_HEIGHT / (fse->index + 1);
+ fse->max_height = fse->min_height;
+
+ return 0;
+}
+
+static int imx296_get_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *fmt)
+{
+ fmt->format = *v4l2_subdev_get_pad_format(sd, state, fmt->pad);
+
+ return 0;
+}
+
+static int imx296_set_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *fmt)
+{
+ struct imx296 *sensor = to_imx296(sd);
+ struct v4l2_mbus_framefmt *format;
+ struct v4l2_rect *crop;
+
+ crop = v4l2_subdev_get_pad_crop(sd, state, fmt->pad);
+ format = v4l2_subdev_get_pad_format(sd, state, fmt->pad);
+
+ /*
+ * Binning is only allowed when cropping is disabled according to the
+ * documentation. This should be double-checked.
+ */
+ if (crop->width == IMX296_PIXEL_ARRAY_WIDTH &&
+ crop->height == IMX296_PIXEL_ARRAY_HEIGHT) {
+ unsigned int width;
+ unsigned int height;
+ unsigned int hratio;
+ unsigned int vratio;
+
+ /* Clamp the width and height to avoid dividing by zero. */
+ width = clamp_t(unsigned int, fmt->format.width,
+ crop->width / 2, crop->width);
+ height = clamp_t(unsigned int, fmt->format.height,
+ crop->height / 2, crop->height);
+
+ hratio = DIV_ROUND_CLOSEST(crop->width, width);
+ vratio = DIV_ROUND_CLOSEST(crop->height, height);
+
+ format->width = crop->width / hratio;
+ format->height = crop->height / vratio;
+ } else {
+ format->width = crop->width;
+ format->height = crop->height;
+ }
+
+ format->code = sensor->mono ? MEDIA_BUS_FMT_Y10_1X10
+ : MEDIA_BUS_FMT_SBGGR10_1X10;
+ format->field = V4L2_FIELD_NONE;
+ format->colorspace = V4L2_COLORSPACE_RAW;
+ format->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ format->quantization = V4L2_QUANTIZATION_FULL_RANGE;
+ format->xfer_func = V4L2_XFER_FUNC_NONE;
+
+ fmt->format = *format;
+
+ return 0;
+}
+
+static int imx296_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_get_pad_crop(sd, state, sel->pad);
+ break;
+
+ case V4L2_SEL_TGT_CROP_DEFAULT:
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ case V4L2_SEL_TGT_NATIVE_SIZE:
+ sel->r.left = 0;
+ sel->r.top = 0;
+ sel->r.width = IMX296_PIXEL_ARRAY_WIDTH;
+ sel->r.height = IMX296_PIXEL_ARRAY_HEIGHT;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int imx296_set_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_selection *sel)
+{
+ struct v4l2_mbus_framefmt *format;
+ struct v4l2_rect *crop;
+ struct v4l2_rect rect;
+
+ if (sel->target != V4L2_SEL_TGT_CROP)
+ return -EINVAL;
+
+ /*
+ * Clamp the crop rectangle boundaries and align them to a multiple of 4
+ * pixels to satisfy hardware requirements.
+ */
+ rect.left = clamp(ALIGN(sel->r.left, 4), 0,
+ IMX296_PIXEL_ARRAY_WIDTH - IMX296_FID0_ROIWH1_MIN);
+ rect.top = clamp(ALIGN(sel->r.top, 4), 0,
+ IMX296_PIXEL_ARRAY_HEIGHT - IMX296_FID0_ROIWV1_MIN);
+ rect.width = clamp_t(unsigned int, ALIGN(sel->r.width, 4),
+ IMX296_FID0_ROIWH1_MIN, IMX296_PIXEL_ARRAY_WIDTH);
+ rect.height = clamp_t(unsigned int, ALIGN(sel->r.height, 4),
+ IMX296_FID0_ROIWV1_MIN, IMX296_PIXEL_ARRAY_HEIGHT);
+
+ rect.width = min_t(unsigned int, rect.width,
+ IMX296_PIXEL_ARRAY_WIDTH - rect.left);
+ rect.height = min_t(unsigned int, rect.height,
+ IMX296_PIXEL_ARRAY_HEIGHT - rect.top);
+
+ crop = v4l2_subdev_get_pad_crop(sd, state, sel->pad);
+
+ if (rect.width != crop->width || rect.height != crop->height) {
+ /*
+ * Reset the output image size if the crop rectangle size has
+ * been modified.
+ */
+ format = v4l2_subdev_get_pad_format(sd, state, sel->pad);
+ format->width = rect.width;
+ format->height = rect.height;
+ }
+
+ *crop = rect;
+ sel->r = rect;
+
+ return 0;
+}
+
+static int imx296_init_cfg(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state)
+{
+ struct v4l2_subdev_selection sel = {
+ .target = V4L2_SEL_TGT_CROP,
+ .r.width = IMX296_PIXEL_ARRAY_WIDTH,
+ .r.height = IMX296_PIXEL_ARRAY_HEIGHT,
+ };
+ struct v4l2_subdev_format format = {
+ .format = {
+ .width = IMX296_PIXEL_ARRAY_WIDTH,
+ .height = IMX296_PIXEL_ARRAY_HEIGHT,
+ },
+ };
+
+ imx296_set_selection(sd, state, &sel);
+ imx296_set_format(sd, state, &format);
+
+ return 0;
+}
+
+static const struct v4l2_subdev_video_ops imx296_subdev_video_ops = {
+ .s_stream = imx296_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops imx296_subdev_pad_ops = {
+ .enum_mbus_code = imx296_enum_mbus_code,
+ .enum_frame_size = imx296_enum_frame_size,
+ .get_fmt = imx296_get_format,
+ .set_fmt = imx296_set_format,
+ .get_selection = imx296_get_selection,
+ .set_selection = imx296_set_selection,
+ .init_cfg = imx296_init_cfg,
+};
+
+static const struct v4l2_subdev_ops imx296_subdev_ops = {
+ .video = &imx296_subdev_video_ops,
+ .pad = &imx296_subdev_pad_ops,
+};
+
+static int imx296_subdev_init(struct imx296 *sensor)
+{
+ struct i2c_client *client = to_i2c_client(sensor->dev);
+ int ret;
+
+ v4l2_i2c_subdev_init(&sensor->subdev, client, &imx296_subdev_ops);
+
+ ret = imx296_ctrls_init(sensor);
+ if (ret < 0)
+ return ret;
+
+ sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
+ sensor->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+ ret = media_entity_pads_init(&sensor->subdev.entity, 1, &sensor->pad);
+ if (ret < 0) {
+ v4l2_ctrl_handler_free(&sensor->ctrls);
+ return ret;
+ }
+
+ sensor->subdev.state_lock = sensor->subdev.ctrl_handler->lock;
+
+ v4l2_subdev_init_finalize(&sensor->subdev);
+
+ return ret;
+}
+
+static void imx296_subdev_cleanup(struct imx296 *sensor)
+{
+ media_entity_cleanup(&sensor->subdev.entity);
+ v4l2_ctrl_handler_free(&sensor->ctrls);
+}
+
+/* -----------------------------------------------------------------------------
+ * Power management
+ */
+
+static int __maybe_unused imx296_runtime_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+ struct imx296 *sensor = to_imx296(subdev);
+
+ return imx296_power_on(sensor);
+}
+
+static int __maybe_unused imx296_runtime_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+ struct imx296 *sensor = to_imx296(subdev);
+
+ imx296_power_off(sensor);
+
+ return 0;
+}
+
+static const struct dev_pm_ops imx296_pm_ops = {
+ SET_RUNTIME_PM_OPS(imx296_runtime_suspend, imx296_runtime_resume, NULL)
+};
+
+/* -----------------------------------------------------------------------------
+ * Probe & Remove
+ */
+
+static int imx296_read_temperature(struct imx296 *sensor, int *temp)
+{
+ int tmdout;
+ int ret;
+
+ ret = imx296_write(sensor, IMX296_TMDCTRL, IMX296_TMDCTRL_LATCH, NULL);
+ if (ret < 0)
+ return ret;
+
+ tmdout = imx296_read(sensor, IMX296_TMDOUT) & IMX296_TMDOUT_MASK;
+ if (tmdout < 0)
+ return tmdout;
+
+ /* T(°C) = 246.312 - 0.304 * TMDOUT */;
+ *temp = 246312 - 304 * tmdout;
+
+ return imx296_write(sensor, IMX296_TMDCTRL, 0, NULL);
+}
+
+static int imx296_identify_model(struct imx296 *sensor)
+{
+ unsigned int model;
+ int temp = 0;
+ int ret;
+
+ model = (uintptr_t)of_device_get_match_data(sensor->dev);
+ if (model) {
+ dev_dbg(sensor->dev,
+ "sensor model auto-detection disabled, forcing 0x%04x\n",
+ model);
+ sensor->mono = model & IMX296_SENSOR_INFO_MONO;
+ return 0;
+ }
+
+ /*
+ * While most registers can be read when the sensor is in standby, this
+ * is not the case of the sensor info register :-(
+ */
+ ret = imx296_write(sensor, IMX296_CTRL00, 0, NULL);
+ if (ret < 0) {
+ dev_err(sensor->dev,
+ "failed to get sensor out of standby (%d)\n", ret);
+ return ret;
+ }
+
+ ret = imx296_read(sensor, IMX296_SENSOR_INFO);
+ if (ret < 0) {
+ dev_err(sensor->dev, "failed to read sensor information (%d)\n",
+ ret);
+ goto done;
+ }
+
+ model = (ret >> 6) & 0x1ff;
+
+ switch (model) {
+ case 296:
+ sensor->mono = ret & IMX296_SENSOR_INFO_MONO;
+ break;
+ /*
+ * The IMX297 seems to share features with the IMX296, it may be
+ * possible to support it in the same driver.
+ */
+ case 297:
+ default:
+ dev_err(sensor->dev, "invalid device model 0x%04x\n", ret);
+ ret = -ENODEV;
+ goto done;
+ }
+
+ ret = imx296_read_temperature(sensor, &temp);
+ if (ret < 0)
+ goto done;
+
+ dev_info(sensor->dev, "found IMX%u%s (%u.%uC)\n", model,
+ sensor->mono ? "LL" : "LQ", temp / 1000, (temp / 100) % 10);
+
+done:
+ imx296_write(sensor, IMX296_CTRL00, IMX296_CTRL00_STANDBY, NULL);
+ return ret;
+}
+
+static const struct regmap_config imx296_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 8,
+
+ .wr_table = &(const struct regmap_access_table) {
+ .no_ranges = (const struct regmap_range[]) {
+ {
+ .range_min = IMX296_SENSOR_INFO & 0xffff,
+ .range_max = (IMX296_SENSOR_INFO & 0xffff) + 1,
+ },
+ },
+ .n_no_ranges = 1,
+ },
+};
+
+static int imx296_probe(struct i2c_client *client)
+{
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ unsigned long clk_rate;
+ struct imx296 *sensor;
+ unsigned int i;
+ int ret;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+ dev_warn(&adapter->dev,
+ "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
+ return -EIO;
+ }
+
+ sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL);
+ if (!sensor)
+ return -ENOMEM;
+
+ sensor->dev = &client->dev;
+
+ /* Acquire resources. */
+ for (i = 0; i < ARRAY_SIZE(sensor->supplies); ++i)
+ sensor->supplies[i].supply = imx296_supply_names[i];
+
+ ret = devm_regulator_bulk_get(sensor->dev, ARRAY_SIZE(sensor->supplies),
+ sensor->supplies);
+ if (ret) {
+ dev_err_probe(sensor->dev, ret, "failed to get supplies\n");
+ return ret;
+ }
+
+ sensor->reset = devm_gpiod_get_optional(sensor->dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(sensor->reset))
+ return dev_err_probe(sensor->dev, PTR_ERR(sensor->reset),
+ "failed to get reset GPIO\n");
+
+ sensor->clk = devm_clk_get(sensor->dev, "inck");
+ if (IS_ERR(sensor->clk))
+ return dev_err_probe(sensor->dev, PTR_ERR(sensor->clk),
+ "failed to get clock\n");
+
+ clk_rate = clk_get_rate(sensor->clk);
+ for (i = 0; i < ARRAY_SIZE(imx296_clk_params); ++i) {
+ if (clk_rate == imx296_clk_params[i].freq) {
+ sensor->clk_params = &imx296_clk_params[i];
+ break;
+ }
+ }
+
+ if (!sensor->clk_params) {
+ dev_err(sensor->dev, "unsupported clock rate %lu\n", clk_rate);
+ return -EINVAL;
+ }
+
+ sensor->regmap = devm_regmap_init_i2c(client, &imx296_regmap_config);
+ if (IS_ERR(sensor->regmap))
+ return PTR_ERR(sensor->regmap);
+
+ /*
+ * 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 = imx296_power_on(sensor);
+ if (ret < 0)
+ return ret;
+
+ ret = imx296_identify_model(sensor);
+ if (ret < 0)
+ goto err_power;
+
+ /* Initialize the V4L2 subdev. */
+ ret = imx296_subdev_init(sensor);
+ if (ret < 0)
+ goto err_power;
+
+ /*
+ * Enable runtime PM. As the device has been powered manually, mark it
+ * as active, and increase the usage count without resuming the device.
+ */
+ pm_runtime_set_active(sensor->dev);
+ pm_runtime_get_noresume(sensor->dev);
+ pm_runtime_enable(sensor->dev);
+
+ /* Register the V4L2 subdev. */
+ ret = v4l2_async_register_subdev(&sensor->subdev);
+ if (ret < 0)
+ goto err_pm;
+
+ /*
+ * Finally, enable autosuspend and decrease the usage count. The device
+ * will get suspended after the autosuspend delay, turning the power
+ * off.
+ */
+ pm_runtime_set_autosuspend_delay(sensor->dev, 1000);
+ pm_runtime_use_autosuspend(sensor->dev);
+ pm_runtime_put_autosuspend(sensor->dev);
+
+ return 0;
+
+err_pm:
+ pm_runtime_disable(sensor->dev);
+ pm_runtime_put_noidle(sensor->dev);
+ imx296_subdev_cleanup(sensor);
+err_power:
+ imx296_power_off(sensor);
+ return ret;
+}
+
+static int imx296_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+ struct imx296 *sensor = to_imx296(subdev);
+
+ v4l2_async_unregister_subdev(subdev);
+
+ imx296_subdev_cleanup(sensor);
+
+ /*
+ * 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))
+ imx296_power_off(sensor);
+ pm_runtime_set_suspended(sensor->dev);
+
+ return 0;
+}
+
+static const struct of_device_id imx296_of_match[] = {
+ { .compatible = "sony,imx296", .data = NULL },
+ { .compatible = "sony,imx296ll", .data = (void *)IMX296_SENSOR_INFO_IMX296LL },
+ { .compatible = "sony,imx296lq", .data = (void *)IMX296_SENSOR_INFO_IMX296LQ },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, imx296_of_match);
+
+static struct i2c_driver imx296_i2c_driver = {
+ .driver = {
+ .of_match_table = imx296_of_match,
+ .name = "imx296",
+ .pm = &imx296_pm_ops
+ },
+ .probe_new = imx296_probe,
+ .remove = imx296_remove,
+};
+
+module_i2c_driver(imx296_i2c_driver);
+
+MODULE_DESCRIPTION("Sony IMX296 Camera driver");
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_LICENSE("GPL");
--
Regards,
Laurent Pinchart
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