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path: root/drivers/media/i2c/gc0310.c
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Diffstat (limited to 'drivers/media/i2c/gc0310.c')
-rw-r--r--drivers/media/i2c/gc0310.c783
1 files changed, 783 insertions, 0 deletions
diff --git a/drivers/media/i2c/gc0310.c b/drivers/media/i2c/gc0310.c
new file mode 100644
index 000000000000..7af4d66f42a0
--- /dev/null
+++ b/drivers/media/i2c/gc0310.c
@@ -0,0 +1,783 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Support for GalaxyCore GC0310 VGA camera sensor.
+ *
+ * Copyright (c) 2013 Intel Corporation. All Rights Reserved.
+ * Copyright (c) 2023-2025 Hans de Goede <hansg@kernel.org>
+ */
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/string.h>
+#include <linux/types.h>
+
+#include <media/v4l2-cci.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fwnode.h>
+
+#define GC0310_NATIVE_WIDTH 656
+#define GC0310_NATIVE_HEIGHT 496
+
+/*
+ * The actual PLL output rate is unknown, the datasheet
+ * says that the formula for the frame-time in pixels is:
+ * rowtime = win-width + hblank + sh-delay + 4
+ * frametime = rowtime * (win-height + vblank)
+ * Filling this in and multiplying by 30 fps gives:
+ * pixelrate = (660 + 178 + 42 + 4) * (498 + 27) * 30 = 13923000
+ */
+#define GC0310_PIXELRATE 13923000
+/* single lane, bus-format is 8 bpp, CSI-2 is double data rate */
+#define GC0310_LINK_FREQ (GC0310_PIXELRATE * 8 / 2)
+#define GC0310_MCLK_FREQ 19200000
+#define GC0310_FPS 30
+#define GC0310_SKIP_FRAMES 3
+
+#define GC0310_ID 0xa310
+
+#define GC0310_RESET_RELATED_REG CCI_REG8(0xfe)
+#define GC0310_REGISTER_PAGE_0 0x0
+#define GC0310_REGISTER_PAGE_3 0x3
+
+/*
+ * GC0310 System control registers
+ */
+#define GC0310_SW_STREAM_REG CCI_REG8(0x10)
+
+#define GC0310_START_STREAMING 0x94 /* 8-bit enable */
+#define GC0310_STOP_STREAMING 0x0 /* 8-bit disable */
+
+#define GC0310_SC_CMMN_CHIP_ID_REG CCI_REG16(0xf0)
+
+#define GC0310_AEC_PK_EXPO_REG CCI_REG16(0x03)
+#define GC0310_AGC_ADJ_REG CCI_REG8(0x48)
+#define GC0310_DGC_ADJ_REG CCI_REG8(0x71)
+
+#define GC0310_H_CROP_START_REG CCI_REG16(0x09)
+#define GC0310_V_CROP_START_REG CCI_REG16(0x0b)
+#define GC0310_H_OUTSIZE_REG CCI_REG16(0x0f)
+#define GC0310_V_OUTSIZE_REG CCI_REG16(0x0d)
+
+#define GC0310_H_BLANKING_REG CCI_REG16(0x05)
+/* Hblank-register + sh-delay + H-crop + 4 (from hw) */
+#define GC0310_H_BLANK_DEFAULT (178 + 42 + 4 + 4)
+
+#define GC0310_V_BLANKING_REG CCI_REG16(0x07)
+/* Vblank needs an offset compensate for the small V-crop done */
+#define GC0310_V_BLANK_OFFSET 2
+/* Vsync start time + 1 row vsync + vsync end time + offset */
+#define GC0310_V_BLANK_MIN (9 + 1 + 4 + GC0310_V_BLANK_OFFSET)
+#define GC0310_V_BLANK_DEFAULT (27 + GC0310_V_BLANK_OFFSET)
+#define GC0310_V_BLANK_MAX (4095 - GC0310_NATIVE_HEIGHT)
+
+#define GC0310_SH_DELAY_REG CCI_REG8(0x11)
+#define GC0310_VS_START_TIME_REG CCI_REG8(0x12)
+#define GC0310_VS_END_TIME_REG CCI_REG8(0x13)
+
+#define to_gc0310_sensor(x) container_of(x, struct gc0310_device, sd)
+
+struct gc0310_device {
+ struct v4l2_subdev sd;
+ struct media_pad pad;
+
+ struct regmap *regmap;
+ struct gpio_desc *reset;
+ struct gpio_desc *powerdown;
+
+ struct gc0310_ctrls {
+ struct v4l2_ctrl_handler handler;
+ struct v4l2_ctrl *exposure;
+ struct v4l2_ctrl *gain;
+ struct v4l2_ctrl *link_freq;
+ struct v4l2_ctrl *pixel_rate;
+ struct v4l2_ctrl *vblank;
+ struct v4l2_ctrl *hblank;
+ } ctrls;
+};
+
+struct gc0310_reg {
+ u8 reg;
+ u8 val;
+};
+
+static const struct reg_sequence gc0310_reset_register[] = {
+ /* System registers */
+ { 0xfe, 0xf0 },
+ { 0xfe, 0xf0 },
+ { 0xfe, 0x00 },
+
+ { 0xfc, 0x0e }, /* 4e */
+ { 0xfc, 0x0e }, /* 16//4e // [0]apwd [6]regf_clk_gate */
+ { 0xf2, 0x80 }, /* sync output */
+ { 0xf3, 0x00 }, /* 1f//01 data output */
+ { 0xf7, 0x33 }, /* f9 */
+ { 0xf8, 0x05 }, /* 00 */
+ { 0xf9, 0x0e }, /* 0x8e //0f */
+ { 0xfa, 0x11 },
+
+ /* MIPI */
+ { 0xfe, 0x03 },
+ { 0x01, 0x03 }, /* mipi 1lane */
+ { 0x02, 0x22 }, /* 0x33 */
+ { 0x03, 0x94 },
+ { 0x04, 0x01 }, /* fifo_prog */
+ { 0x05, 0x00 }, /* fifo_prog */
+ { 0x06, 0x80 }, /* b0 //YUV ISP data */
+ { 0x11, 0x2a }, /* 1e //LDI set YUV422 */
+ { 0x12, 0x90 }, /* 00 //04 //00 //04//00 //LWC[7:0] */
+ { 0x13, 0x02 }, /* 05 //05 //LWC[15:8] */
+ { 0x15, 0x12 }, /* 0x10 //DPHYY_MODE read_ready */
+ { 0x17, 0x01 },
+ { 0x40, 0x08 },
+ { 0x41, 0x00 },
+ { 0x42, 0x00 },
+ { 0x43, 0x00 },
+ { 0x21, 0x02 }, /* 0x01 */
+ { 0x22, 0x02 }, /* 0x01 */
+ { 0x23, 0x01 }, /* 0x05 //Nor:0x05 DOU:0x06 */
+ { 0x29, 0x00 },
+ { 0x2A, 0x25 }, /* 0x05 //data zero 0x7a de */
+ { 0x2B, 0x02 },
+
+ { 0xfe, 0x00 },
+
+ /* CISCTL */
+ { 0x00, 0x2f }, /* 2f//0f//02//01 */
+ { 0x01, 0x0f }, /* 06 */
+ { 0x02, 0x04 },
+ { 0x4f, 0x00 }, /* AEC 0FF */
+ { 0x03, 0x01 }, /* 0x03 //04 */
+ { 0x04, 0xc0 }, /* 0xe8 //58 */
+ { 0x05, 0x00 },
+ { 0x06, 0xb2 }, /* 0x0a //HB */
+ /* Vblank (reg 0x07 + 0x08) gets set by the vblank ctrl */
+ { 0x09, 0x00 }, /* row start */
+ { 0x0a, 0x00 },
+ { 0x0b, 0x00 }, /* col start */
+ { 0x0c, 0x00 },
+ { 0x0d, 0x01 }, /* height */
+ { 0x0e, 0xf2 }, /* 0xf7 //height */
+ { 0x0f, 0x02 }, /* width */
+ { 0x10, 0x94 }, /* 0xa0 //height */
+ { 0x17, 0x14 },
+ { 0x18, 0x1a }, /* 0a//[4]double reset */
+ { 0x19, 0x14 }, /* AD pipeline */
+ { 0x1b, 0x48 },
+ { 0x1e, 0x6b }, /* 3b//col bias */
+ { 0x1f, 0x28 }, /* 20//00//08//txlow */
+ { 0x20, 0x89 }, /* 88//0c//[3:2]DA15 */
+ { 0x21, 0x49 }, /* 48//[3] txhigh */
+ { 0x22, 0xb0 },
+ { 0x23, 0x04 }, /* [1:0]vcm_r */
+ { 0x24, 0x16 }, /* 15 */
+ { 0x34, 0x20 }, /* [6:4] rsg high//range */
+
+ /* BLK */
+ { 0x26, 0x23 }, /* [1]dark_current_en [0]offset_en */
+ { 0x28, 0xff }, /* BLK_limie_value */
+ { 0x29, 0x00 }, /* global offset */
+ { 0x33, 0x18 }, /* offset_ratio */
+ { 0x37, 0x20 }, /* dark_current_ratio */
+ { 0x2a, 0x00 },
+ { 0x2b, 0x00 },
+ { 0x2c, 0x00 },
+ { 0x2d, 0x00 },
+ { 0x2e, 0x00 },
+ { 0x2f, 0x00 },
+ { 0x30, 0x00 },
+ { 0x31, 0x00 },
+ { 0x47, 0x80 }, /* a7 */
+ { 0x4e, 0x66 }, /* select_row */
+ { 0xa8, 0x02 }, /* win_width_dark, same with crop_win_width */
+ { 0xa9, 0x80 },
+
+ /* ISP */
+ { 0x40, 0x06 }, /* 0xff //ff //48 */
+ { 0x41, 0x00 }, /* 0x21 //00//[0]curve_en */
+ { 0x42, 0x04 }, /* 0xcf //0a//[1]awn_en */
+ { 0x44, 0x18 }, /* 0x18 //02 */
+ { 0x46, 0x02 }, /* 0x03 //sync */
+ { 0x49, 0x03 },
+ { 0x4c, 0x20 }, /* 00[5]pretect exp */
+ { 0x50, 0x01 }, /* crop enable */
+ { 0x51, 0x00 },
+ { 0x52, 0x00 },
+ { 0x53, 0x00 },
+ { 0x54, 0x01 },
+ { 0x55, 0x01 }, /* crop window height */
+ { 0x56, 0xf0 },
+ { 0x57, 0x02 }, /* crop window width */
+ { 0x58, 0x90 },
+
+ /* Gain */
+ { 0x70, 0x70 }, /* 70 //80//global gain */
+ { 0x71, 0x20 }, /* pregain gain */
+ { 0x72, 0x40 }, /* post gain */
+ { 0x5a, 0x84 }, /* 84//analog gain 0 */
+ { 0x5b, 0xc9 }, /* c9 */
+ { 0x5c, 0xed }, /* ed//not use pga gain highest level */
+ { 0x77, 0x40 }, /* R gain 0x74 //awb gain */
+ { 0x78, 0x40 }, /* G gain */
+ { 0x79, 0x40 }, /* B gain 0x5f */
+
+ { 0x48, 0x00 },
+ { 0xfe, 0x01 },
+ { 0x0a, 0x45 }, /* [7]col gain mode */
+
+ { 0x3e, 0x40 },
+ { 0x3f, 0x5c },
+ { 0x40, 0x7b },
+ { 0x41, 0xbd },
+ { 0x42, 0xf6 },
+ { 0x43, 0x63 },
+ { 0x03, 0x60 },
+ { 0x44, 0x03 },
+
+ /* Dark / Sun mode related */
+ { 0xfe, 0x01 },
+ { 0x45, 0xa4 }, /* 0xf7 */
+ { 0x46, 0xf0 }, /* 0xff //f0//sun value th */
+ { 0x48, 0x03 }, /* sun mode */
+ { 0x4f, 0x60 }, /* sun_clamp */
+ { 0xfe, 0x00 },
+};
+
+static const struct reg_sequence gc0310_VGA_30fps[] = {
+ { 0xfe, 0x00 },
+ { 0x0d, 0x01 }, /* height */
+ { 0x0e, 0xf2 }, /* 0xf7 //height */
+ { 0x0f, 0x02 }, /* width */
+ { 0x10, 0x94 }, /* 0xa0 //height */
+
+ { 0x50, 0x01 }, /* crop enable */
+ { 0x51, 0x00 },
+ { 0x52, 0x00 },
+ { 0x53, 0x00 },
+ { 0x54, 0x01 },
+ { 0x55, 0x01 }, /* crop window height */
+ { 0x56, 0xf0 },
+ { 0x57, 0x02 }, /* crop window width */
+ { 0x58, 0x90 },
+
+ { 0xfe, 0x03 },
+ { 0x12, 0x90 }, /* 00 //04 //00 //04//00 //LWC[7:0] */
+ { 0x13, 0x02 }, /* 05 //05 //LWC[15:8] */
+
+ { 0xfe, 0x00 },
+};
+
+static const s64 link_freq_menu_items[] = {
+ GC0310_LINK_FREQ,
+};
+
+static int gc0310_gain_set(struct gc0310_device *sensor, u32 gain)
+{
+ u8 again, dgain;
+ int ret = 0;
+
+ /* Taken from original driver, this never sets dgain lower then 32? */
+
+ /* Change 0 - 95 to 32 - 127 */
+ gain += 32;
+
+ if (gain < 64) {
+ again = 0x0; /* sqrt(2) */
+ dgain = gain;
+ } else {
+ again = 0x2; /* 2 * sqrt(2) */
+ dgain = gain / 2;
+ }
+
+ cci_write(sensor->regmap, GC0310_AGC_ADJ_REG, again, &ret);
+ cci_write(sensor->regmap, GC0310_DGC_ADJ_REG, dgain, &ret);
+ return ret;
+}
+
+static int gc0310_exposure_update_range(struct gc0310_device *sensor)
+{
+ int exp_max = GC0310_NATIVE_HEIGHT + sensor->ctrls.vblank->val;
+
+ return __v4l2_ctrl_modify_range(sensor->ctrls.exposure, 0, exp_max,
+ 1, exp_max);
+}
+
+static int gc0310_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct gc0310_device *sensor =
+ container_of(ctrl->handler, struct gc0310_device, ctrls.handler);
+ int ret;
+
+ /* Update exposure range on vblank changes */
+ if (ctrl->id == V4L2_CID_VBLANK) {
+ ret = gc0310_exposure_update_range(sensor);
+ if (ret)
+ return ret;
+ }
+
+ /* Only apply changes to the controls if the device is powered up */
+ if (!pm_runtime_get_if_in_use(sensor->sd.dev))
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_EXPOSURE:
+ ret = cci_write(sensor->regmap, GC0310_AEC_PK_EXPO_REG,
+ ctrl->val, NULL);
+ break;
+ case V4L2_CID_ANALOGUE_GAIN:
+ ret = gc0310_gain_set(sensor, ctrl->val);
+ break;
+ case V4L2_CID_VBLANK:
+ ret = cci_write(sensor->regmap, GC0310_V_BLANKING_REG,
+ ctrl->val - GC0310_V_BLANK_OFFSET,
+ NULL);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ pm_runtime_put(sensor->sd.dev);
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops ctrl_ops = {
+ .s_ctrl = gc0310_s_ctrl,
+};
+
+/* The GC0310 currently only supports 1 fixed fmt */
+static void gc0310_fill_format(struct v4l2_mbus_framefmt *fmt)
+{
+ memset(fmt, 0, sizeof(*fmt));
+ fmt->width = GC0310_NATIVE_WIDTH;
+ fmt->height = GC0310_NATIVE_HEIGHT;
+ fmt->field = V4L2_FIELD_NONE;
+ fmt->code = MEDIA_BUS_FMT_SGRBG8_1X8;
+}
+
+static int gc0310_get_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_selection *sel)
+{
+ /* Only the single fixed 656x496 mode is supported, without croping */
+ switch (sel->target) {
+ case V4L2_SEL_TGT_CROP:
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ case V4L2_SEL_TGT_CROP_DEFAULT:
+ case V4L2_SEL_TGT_NATIVE_SIZE:
+ sel->r.top = 0;
+ sel->r.left = 0;
+ sel->r.width = GC0310_NATIVE_WIDTH;
+ sel->r.height = GC0310_NATIVE_HEIGHT;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int gc0310_power_off(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct gc0310_device *sensor = to_gc0310_sensor(sd);
+
+ gpiod_set_value_cansleep(sensor->powerdown, 1);
+ gpiod_set_value_cansleep(sensor->reset, 1);
+ return 0;
+}
+
+static int gc0310_power_on(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct gc0310_device *sensor = to_gc0310_sensor(sd);
+
+ fsleep(10 * USEC_PER_MSEC);
+ gpiod_set_value_cansleep(sensor->reset, 0);
+ fsleep(10 * USEC_PER_MSEC);
+ gpiod_set_value_cansleep(sensor->powerdown, 0);
+ fsleep(10 * USEC_PER_MSEC);
+
+ return 0;
+}
+
+static int gc0310_detect(struct gc0310_device *sensor)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd);
+ u64 val;
+ int ret;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+ return -ENODEV;
+
+ ret = cci_read(sensor->regmap, GC0310_SC_CMMN_CHIP_ID_REG, &val, NULL);
+ if (ret < 0) {
+ dev_err(&client->dev, "read sensor_id failed: %d\n", ret);
+ return -ENODEV;
+ }
+
+ dev_dbg(&client->dev, "sensor ID = 0x%llx\n", val);
+
+ if (val != GC0310_ID) {
+ dev_err(&client->dev, "sensor ID error, read id = 0x%llx, target id = 0x%x\n",
+ val, GC0310_ID);
+ return -ENODEV;
+ }
+
+ dev_dbg(&client->dev, "detect gc0310 success\n");
+
+ return 0;
+}
+
+static int gc0310_enable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ u32 pad, u64 streams_mask)
+{
+ struct gc0310_device *sensor = to_gc0310_sensor(sd);
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ int ret;
+
+ ret = pm_runtime_resume_and_get(&client->dev);
+ if (ret)
+ return ret;
+
+ ret = regmap_multi_reg_write(sensor->regmap,
+ gc0310_reset_register,
+ ARRAY_SIZE(gc0310_reset_register));
+ if (ret)
+ goto error_power_down;
+
+ ret = regmap_multi_reg_write(sensor->regmap,
+ gc0310_VGA_30fps,
+ ARRAY_SIZE(gc0310_VGA_30fps));
+ if (ret)
+ goto error_power_down;
+
+ /* restore value of all ctrls */
+ ret = __v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
+
+ /* enable per frame MIPI and sensor ctrl reset */
+ cci_write(sensor->regmap, GC0310_RESET_RELATED_REG, 0x30, &ret);
+
+ cci_write(sensor->regmap, GC0310_RESET_RELATED_REG,
+ GC0310_REGISTER_PAGE_3, &ret);
+ cci_write(sensor->regmap, GC0310_SW_STREAM_REG,
+ GC0310_START_STREAMING, &ret);
+ cci_write(sensor->regmap, GC0310_RESET_RELATED_REG,
+ GC0310_REGISTER_PAGE_0, &ret);
+
+error_power_down:
+ if (ret)
+ pm_runtime_put(&client->dev);
+
+ return ret;
+}
+
+static int gc0310_disable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ u32 pad, u64 streams_mask)
+{
+ struct gc0310_device *sensor = to_gc0310_sensor(sd);
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ int ret = 0;
+
+ cci_write(sensor->regmap, GC0310_RESET_RELATED_REG,
+ GC0310_REGISTER_PAGE_3, &ret);
+ cci_write(sensor->regmap, GC0310_SW_STREAM_REG,
+ GC0310_STOP_STREAMING, &ret);
+ cci_write(sensor->regmap, GC0310_RESET_RELATED_REG,
+ GC0310_REGISTER_PAGE_0, &ret);
+
+ pm_runtime_put(&client->dev);
+ return ret;
+}
+
+static int gc0310_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ /* We support only a single format */
+ if (code->index)
+ return -EINVAL;
+
+ code->code = MEDIA_BUS_FMT_SGRBG8_1X8;
+ return 0;
+}
+
+static int gc0310_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ /* We support only a single resolution */
+ if (fse->index)
+ return -EINVAL;
+
+ fse->min_width = GC0310_NATIVE_WIDTH;
+ fse->max_width = GC0310_NATIVE_WIDTH;
+ fse->min_height = GC0310_NATIVE_HEIGHT;
+ fse->max_height = GC0310_NATIVE_HEIGHT;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_video_ops gc0310_video_ops = {
+ .s_stream = v4l2_subdev_s_stream_helper,
+};
+
+static const struct v4l2_subdev_pad_ops gc0310_pad_ops = {
+ .enum_mbus_code = gc0310_enum_mbus_code,
+ .enum_frame_size = gc0310_enum_frame_size,
+ .get_fmt = v4l2_subdev_get_fmt,
+ .set_fmt = v4l2_subdev_get_fmt, /* Only 1 fixed mode supported */
+ .get_selection = gc0310_get_selection,
+ .set_selection = gc0310_get_selection,
+ .enable_streams = gc0310_enable_streams,
+ .disable_streams = gc0310_disable_streams,
+};
+
+static const struct v4l2_subdev_ops gc0310_ops = {
+ .video = &gc0310_video_ops,
+ .pad = &gc0310_pad_ops,
+};
+
+static int gc0310_init_state(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state)
+{
+ gc0310_fill_format(v4l2_subdev_state_get_format(sd_state, 0));
+ return 0;
+}
+
+static const struct v4l2_subdev_internal_ops gc0310_internal_ops = {
+ .init_state = gc0310_init_state,
+};
+
+static int gc0310_init_controls(struct gc0310_device *sensor)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd);
+ struct v4l2_ctrl_handler *hdl = &sensor->ctrls.handler;
+ struct v4l2_fwnode_device_properties props;
+ int exp_max, ret;
+
+ v4l2_ctrl_handler_init(hdl, 8);
+
+ /* Use the same lock for controls as for everything else */
+ sensor->sd.ctrl_handler = hdl;
+
+ exp_max = GC0310_NATIVE_HEIGHT + GC0310_V_BLANK_DEFAULT;
+ sensor->ctrls.exposure =
+ v4l2_ctrl_new_std(hdl, &ctrl_ops, V4L2_CID_EXPOSURE, 0,
+ exp_max, 1, exp_max);
+
+ /* 32 steps at base gain 1 + 64 half steps at base gain 2 */
+ sensor->ctrls.gain =
+ v4l2_ctrl_new_std(hdl, &ctrl_ops, V4L2_CID_ANALOGUE_GAIN, 0, 95, 1, 31);
+
+ sensor->ctrls.link_freq =
+ v4l2_ctrl_new_int_menu(hdl, NULL, V4L2_CID_LINK_FREQ,
+ 0, 0, link_freq_menu_items);
+ sensor->ctrls.pixel_rate =
+ v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_PIXEL_RATE, 0,
+ GC0310_PIXELRATE, 1, GC0310_PIXELRATE);
+
+ sensor->ctrls.vblank =
+ v4l2_ctrl_new_std(hdl, &ctrl_ops, V4L2_CID_VBLANK,
+ GC0310_V_BLANK_MIN,
+ GC0310_V_BLANK_MAX, 1,
+ GC0310_V_BLANK_DEFAULT);
+
+ sensor->ctrls.hblank =
+ v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_HBLANK,
+ GC0310_H_BLANK_DEFAULT,
+ GC0310_H_BLANK_DEFAULT, 1,
+ GC0310_H_BLANK_DEFAULT);
+
+ ret = v4l2_fwnode_device_parse(&client->dev, &props);
+ if (ret)
+ return ret;
+
+ v4l2_ctrl_new_fwnode_properties(hdl, &ctrl_ops, &props);
+
+ if (hdl->error)
+ return hdl->error;
+
+ sensor->ctrls.pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+ sensor->ctrls.link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+ sensor->ctrls.hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+ return 0;
+}
+
+static void gc0310_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct gc0310_device *sensor = to_gc0310_sensor(sd);
+
+ v4l2_async_unregister_subdev(sd);
+ v4l2_subdev_cleanup(sd);
+ media_entity_cleanup(&sensor->sd.entity);
+ v4l2_ctrl_handler_free(&sensor->ctrls.handler);
+ pm_runtime_disable(&client->dev);
+ if (!pm_runtime_status_suspended(&client->dev)) {
+ gc0310_power_off(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ }
+}
+
+static int gc0310_check_hwcfg(struct device *dev)
+{
+ struct v4l2_fwnode_endpoint bus_cfg = {
+ .bus_type = V4L2_MBUS_CSI2_DPHY,
+ };
+ struct fwnode_handle *ep_fwnode;
+ unsigned long link_freq_bitmap;
+ u32 mclk;
+ int ret;
+
+ /*
+ * Sometimes the fwnode graph is initialized by the bridge driver.
+ * Bridge drivers doing this may also add GPIO mappings, wait for this.
+ */
+ ep_fwnode = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, 0);
+ if (!ep_fwnode)
+ return dev_err_probe(dev, -EPROBE_DEFER,
+ "waiting for fwnode graph endpoint\n");
+
+ ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency",
+ &mclk);
+ if (ret) {
+ fwnode_handle_put(ep_fwnode);
+ return dev_err_probe(dev, ret,
+ "reading clock-frequency property\n");
+ }
+
+ if (mclk != GC0310_MCLK_FREQ) {
+ fwnode_handle_put(ep_fwnode);
+ return dev_err_probe(dev, -EINVAL,
+ "external clock %u is not supported\n",
+ mclk);
+ }
+
+ ret = v4l2_fwnode_endpoint_alloc_parse(ep_fwnode, &bus_cfg);
+ fwnode_handle_put(ep_fwnode);
+ if (ret)
+ return dev_err_probe(dev, ret, "parsing endpoint failed\n");
+
+ ret = v4l2_link_freq_to_bitmap(dev, bus_cfg.link_frequencies,
+ bus_cfg.nr_of_link_frequencies,
+ link_freq_menu_items,
+ ARRAY_SIZE(link_freq_menu_items),
+ &link_freq_bitmap);
+
+ if (ret == 0 && bus_cfg.bus.mipi_csi2.num_data_lanes != 1)
+ ret = dev_err_probe(dev, -EINVAL,
+ "number of CSI2 data lanes %u is not supported\n",
+ bus_cfg.bus.mipi_csi2.num_data_lanes);
+
+ v4l2_fwnode_endpoint_free(&bus_cfg);
+ return ret;
+}
+
+static int gc0310_probe(struct i2c_client *client)
+{
+ struct gc0310_device *sensor;
+ int ret;
+
+ ret = gc0310_check_hwcfg(&client->dev);
+ if (ret)
+ return ret;
+
+ sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL);
+ if (!sensor)
+ return -ENOMEM;
+
+ sensor->reset = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(sensor->reset)) {
+ return dev_err_probe(&client->dev, PTR_ERR(sensor->reset),
+ "getting reset GPIO\n");
+ }
+
+ sensor->powerdown = devm_gpiod_get(&client->dev, "powerdown", GPIOD_OUT_HIGH);
+ if (IS_ERR(sensor->powerdown)) {
+ return dev_err_probe(&client->dev, PTR_ERR(sensor->powerdown),
+ "getting powerdown GPIO\n");
+ }
+
+ v4l2_i2c_subdev_init(&sensor->sd, client, &gc0310_ops);
+
+ sensor->regmap = devm_cci_regmap_init_i2c(client, 8);
+ if (IS_ERR(sensor->regmap))
+ return PTR_ERR(sensor->regmap);
+
+ gc0310_power_on(&client->dev);
+
+ pm_runtime_set_active(&client->dev);
+ pm_runtime_get_noresume(&client->dev);
+ pm_runtime_enable(&client->dev);
+
+ ret = gc0310_detect(sensor);
+ if (ret)
+ goto err_power_down;
+
+ sensor->sd.internal_ops = &gc0310_internal_ops;
+ sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
+ sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+
+ ret = gc0310_init_controls(sensor);
+ if (ret)
+ goto err_power_down;
+
+ ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
+ if (ret)
+ goto err_power_down;
+
+ sensor->sd.state_lock = sensor->ctrls.handler.lock;
+ ret = v4l2_subdev_init_finalize(&sensor->sd);
+ if (ret)
+ goto err_power_down;
+
+ ret = v4l2_async_register_subdev_sensor(&sensor->sd);
+ if (ret)
+ goto err_power_down;
+
+ pm_runtime_set_autosuspend_delay(&client->dev, 1000);
+ pm_runtime_use_autosuspend(&client->dev);
+ pm_runtime_put_autosuspend(&client->dev);
+
+ return 0;
+
+err_power_down:
+ pm_runtime_put_noidle(&client->dev);
+ gc0310_remove(client);
+ return ret;
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(gc0310_pm_ops,
+ gc0310_power_off, gc0310_power_on, NULL);
+
+static const struct acpi_device_id gc0310_acpi_match[] = {
+ {"INT0310"},
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, gc0310_acpi_match);
+
+static struct i2c_driver gc0310_driver = {
+ .driver = {
+ .name = "gc0310",
+ .pm = pm_sleep_ptr(&gc0310_pm_ops),
+ .acpi_match_table = gc0310_acpi_match,
+ },
+ .probe = gc0310_probe,
+ .remove = gc0310_remove,
+};
+module_i2c_driver(gc0310_driver);
+
+MODULE_AUTHOR("Lai, Angie <angie.lai@intel.com>");
+MODULE_AUTHOR("Hans de Goede <hansg@kernel.org>");
+MODULE_DESCRIPTION("A low-level driver for GalaxyCore GC0310 sensors");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-03 05:31:28 +0000