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build/patch/kernel/archive/sunxi-6.1/patches.megous/media-gc2145-Galaxycore-camera-module-driver.patch

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From 63fd2e1de02888337d5cd21da80c11a8ff378729 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Jirman?= <megi@xff.cz>
Date: Tue, 23 Jun 2020 19:51:18 +0200
Subject: [PATCH 043/389] media: gc2145: Galaxycore camera module driver
WIP!
Signed-off-by: Ondrej Jirman <megi@xff.cz>
---
drivers/media/i2c/Kconfig | 10 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/gc2145.c | 2245 ++++++++++++++++++++++++++++++++++++
3 files changed, 2256 insertions(+)
create mode 100644 drivers/media/i2c/gc2145.c
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 1ebea5f24157..ca8f115efd28 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -793,6 +793,16 @@ config VIDEO_HM5065
This is a V4L2 sensor-level driver for Himax HM5065
5 Mpixel camera.
+config VIDEO_GC2145
+ tristate "GalaxyCore GC2145 sensor support"
+ depends on I2C
+ select V4L2_FWNODE
+ select VIDEO_V4L2_SUBDEV_API
+ select MEDIA_CONTROLLER
+ help
+ This is a V4L2 sensor-level driver for GalaxyCore GC2145
+ 2 Mpixel camera.
+
endmenu
menu "Lens drivers"
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index 072195dca98a..de6b3251a446 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -143,3 +143,4 @@ obj-$(CONFIG_VIDEO_VS6624) += vs6624.o
obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
obj-$(CONFIG_VIDEO_HM5065) += hm5065.o
+obj-$(CONFIG_VIDEO_GC2145) += gc2145.o
diff --git a/drivers/media/i2c/gc2145.c b/drivers/media/i2c/gc2145.c
new file mode 100644
index 000000000000..f25f0c2dcefd
--- /dev/null
+++ b/drivers/media/i2c/gc2145.c
@@ -0,0 +1,2245 @@
+/*
+ * Galaxycore GC2145 driver.
+ * Copyright (C) 2018 Ondřej Jirman <megi@xff.cz>.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#define DEBUG
+
+#include <asm/div64.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/ctype.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/gpio/consumer.h>
+#include <linux/regulator/consumer.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+/*
+ * GC2145
+ * - 2M pixel
+ * - 1600 x 1200, max frame rate: 720P, 30fps@96MHz
+ * - Bayer RGB, RGB565, YCbCr 4:2:2
+ * - AE, AWB
+ * - PLL
+ * - AVDD 2.7-3V, DVDD 1.7-1.9V, IOVDD 1.7-3V
+ * - Power 180mW / 200uA standby
+ * - Interpolation, denoise, gamma, edge enhance
+ * I2C:
+ * - write reg8
+ * - read reg8
+ * - write reg8 multi
+ *
+ * Power on:
+ * MCLK on
+ * PWDN, RESET low
+ * IOVDD, AVDD, DVDD on in sequence
+ * RESET high
+ *
+ * Power off:
+ * PWDN, RESET low
+ * RESET high
+ * delay
+ * PWDN high
+ * RESET low
+ * IOVDD, AVDD, DVDD off
+ * PWDN low?
+ * MCLK off
+ *
+ * Init:
+ * - check chip id
+ * - setup pll
+ * - setup CSI interface / PAD drive strength
+ * - setup resolution/fps
+ * - enable postprocessing
+ * (ISP related chapter)
+ *
+ * Stream on:
+ * - ???
+ */
+
+#define GC2145_FIRMWARE_PARAMETERS "gc2145-init.bin"
+
+#define GC2145_SENSOR_WIDTH_MIN 88u
+#define GC2145_SENSOR_HEIGHT_MIN 72u
+
+//XXX: 1616x1232 8H/16V dummy pixels on each side
+#define GC2145_SENSOR_WIDTH_MAX 1600u
+#define GC2145_SENSOR_HEIGHT_MAX 1200u
+
+/* {{{ Register definitions */
+
+/* system registers */
+#define GC2145_REG_CHIP_ID 0xf0
+#define GC2145_REG_CHIP_ID_VALUE 0x2145
+
+#define GC2145_REG_PAD_IO 0xf2
+#define GC2145_REG_PLL_MODE1 0xf7
+#define GC2145_REG_PLL_MODE2 0xf8
+#define GC2145_REG_CM_MODE 0xf9
+#define GC2145_REG_CLK_DIV_MODE 0xfa
+#define GC2145_REG_ANALOG_PWC 0xfc
+#define GC2145_REG_SCALER_MODE 0xfd
+#define GC2145_REG_RESET 0xfe
+
+#define GC2145_P0_EXPOSURE_HI 0x03
+#define GC2145_P0_EXPOSURE_LO 0x04
+#define GC2145_P0_HBLANK_DELAY_HI 0x05
+#define GC2145_P0_HBLANK_DELAY_LO 0x06
+#define GC2145_P0_VBLANK_DELAY_HI 0x07
+#define GC2145_P0_VBLANK_DELAY_LO 0x08
+#define GC2145_P0_ROW_START_HI 0x09
+#define GC2145_P0_ROW_START_LO 0x0a
+#define GC2145_P0_COL_START_HI 0x0b
+#define GC2145_P0_COL_START_LO 0x0c
+#define GC2145_P0_WIN_HEIGHT_HI 0x0d
+#define GC2145_P0_WIN_HEIGHT_LO 0x0e
+#define GC2145_P0_WIN_WIDTH_HI 0x0f
+#define GC2145_P0_WIN_WIDTH_LO 0x10
+#define GC2145_P0_SH_DELAY_HI 0x11
+#define GC2145_P0_SH_DELAY_LO 0x12
+#define GC2145_P0_START_TIME 0x13
+#define GC2145_P0_END_TIME 0x14
+
+#define GC2145_P0_ISP_BLK_ENABLE1 0x80
+#define GC2145_P0_ISP_BLK_ENABLE2 0x81
+#define GC2145_P0_ISP_BLK_ENABLE3 0x82
+#define GC2145_P0_ISP_SPECIAL_EFFECT 0x83
+#define GC2145_P0_ISP_OUT_FORMAT 0x84
+#define GC2145_P0_FRAME_START 0x85
+#define GC2145_P0_SYNC_MODE 0x86
+#define GC2145_P0_ISP_BLK_ENABLE4 0x87
+#define GC2145_P0_ISP_MODULE_GATING 0x88
+#define GC2145_P0_ISP_BYPASS_MODE 0x89
+#define GC2145_P0_DEBUG_MODE2 0x8c
+#define GC2145_P0_DEBUG_MODE3 0x8d
+
+#define GC2145_P0_CROP_ENABLE 0x90
+#define GC2145_P0_CROP_Y1_HI 0x91
+#define GC2145_P0_CROP_Y1_LO 0x92
+#define GC2145_P0_CROP_X1_HI 0x93
+#define GC2145_P0_CROP_X1_LO 0x94
+#define GC2145_P0_CROP_WIN_HEIGHT_HI 0x95
+#define GC2145_P0_CROP_WIN_HEIGHT_LO 0x96
+#define GC2145_P0_CROP_WIN_WIDTH_HI 0x97
+#define GC2145_P0_CROP_WIN_WIDTH_LO 0x98
+
+#define GC2145_P0_SUBSAMPLE_RATIO 0x99
+#define GC2145_P0_SUBSAMPLE_MODE 0x9a
+#define GC2145_P0_SUB_ROW_N1 0x9b
+#define GC2145_P0_SUB_ROW_N2 0x9c
+#define GC2145_P0_SUB_ROW_N3 0x9d
+#define GC2145_P0_SUB_ROW_N4 0x9e
+#define GC2145_P0_SUB_COL_N1 0x9f
+#define GC2145_P0_SUB_COL_N2 0xa0
+#define GC2145_P0_SUB_COL_N3 0xa1
+#define GC2145_P0_SUB_COL_N4 0xa2
+#define GC2145_P0_OUT_BUF_ENABLE 0xc2
+
+/* }}} */
+
+struct gc2145_pixfmt {
+ u32 code;
+ u32 colorspace;
+ u8 fmt_setup;
+};
+
+static const struct gc2145_pixfmt gc2145_formats[] = {
+ {
+ .code = MEDIA_BUS_FMT_UYVY8_2X8,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .fmt_setup = 0x00,
+ },
+ {
+ .code = MEDIA_BUS_FMT_VYUY8_2X8,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .fmt_setup = 0x01,
+ },
+ {
+ .code = MEDIA_BUS_FMT_YUYV8_2X8,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .fmt_setup = 0x02,
+ },
+ {
+ .code = MEDIA_BUS_FMT_YVYU8_2X8,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .fmt_setup = 0x03,
+ },
+ {
+ .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .fmt_setup = 0x06,
+ },
+};
+
+static const struct gc2145_pixfmt *gc2145_find_format(u32 code)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(gc2145_formats); i++)
+ if (gc2145_formats[i].code == code)
+ return &gc2145_formats[i];
+
+ return NULL;
+}
+
+/* regulator supplies */
+static const char * const gc2145_supply_name[] = {
+ "IOVDD", /* Digital I/O (1.7-3V) suppply */
+ "AVDD", /* Analog (2.7-3V) supply */
+ "DVDD", /* Digital Core (1.7-1.9V) supply */
+};
+
+#define GC2145_NUM_SUPPLIES ARRAY_SIZE(gc2145_supply_name)
+
+struct gc2145_ctrls {
+ struct v4l2_ctrl_handler handler;
+ struct {
+ struct v4l2_ctrl *auto_exposure;
+ struct v4l2_ctrl *exposure;
+ struct v4l2_ctrl *d_gain;
+ struct v4l2_ctrl *a_gain;
+ };
+ struct v4l2_ctrl *metering;
+ struct v4l2_ctrl *exposure_bias;
+ struct {
+ struct v4l2_ctrl *wb;
+ struct v4l2_ctrl *blue_balance;
+ struct v4l2_ctrl *red_balance;
+ };
+ struct v4l2_ctrl *aaa_lock;
+ struct v4l2_ctrl *hflip;
+ struct v4l2_ctrl *vflip;
+ struct v4l2_ctrl *pl_freq;
+ struct v4l2_ctrl *colorfx;
+ struct v4l2_ctrl *brightness;
+ struct v4l2_ctrl *saturation;
+ struct v4l2_ctrl *contrast;
+ struct v4l2_ctrl *gamma;
+ struct v4l2_ctrl *test_pattern;
+ struct v4l2_ctrl *test_data[4];
+};
+
+enum {
+ TX_WRITE = 1,
+ TX_WRITE16,
+ TX_UPDATE_BITS,
+};
+
+#define GC2145_MAX_OPS 64
+
+struct gc2145_tx_op {
+ int op;
+ u16 reg;
+ u16 val;
+ u16 mask;
+};
+
+struct gc2145_dev {
+ struct i2c_client *i2c_client;
+ struct v4l2_subdev sd;
+ struct media_pad pad;
+ struct v4l2_fwnode_endpoint ep; /* the parsed DT endpoint info */
+ struct clk *xclk; /* external clock for GC2145 */
+
+ struct regulator_bulk_data supplies[GC2145_NUM_SUPPLIES];
+ struct gpio_desc *reset_gpio; // nrst pin
+ struct gpio_desc *enable_gpio; // ce pin
+
+ /* lock to protect all members below */
+ struct mutex lock;
+
+ struct v4l2_mbus_framefmt fmt;
+ struct v4l2_fract frame_interval;
+ struct gc2145_ctrls ctrls;
+
+ bool pending_mode_change;
+ bool powered;
+ bool streaming;
+
+ u8 current_bank;
+
+ struct gc2145_tx_op ops[GC2145_MAX_OPS];
+ int n_ops;
+ int tx_started;
+};
+
+static inline struct gc2145_dev *to_gc2145_dev(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct gc2145_dev, sd);
+}
+
+/* {{{ Register access helpers */
+
+static int gc2145_write_regs(struct gc2145_dev *sensor, u8 addr,
+ u8 *data, int data_size)
+{
+ struct i2c_client *client = sensor->i2c_client;
+ struct i2c_msg msg;
+ u8 buf[128 + 1];
+ int ret;
+
+ if (data_size > sizeof(buf) - 1) {
+ v4l2_err(&sensor->sd, "%s: oversized transfer (size=%d)\n",
+ __func__, data_size);
+ return -EINVAL;
+ }
+
+ buf[0] = addr;
+ memcpy(buf + 1, data, data_size);
+
+ msg.addr = client->addr;
+ msg.flags = client->flags;
+ msg.buf = buf;
+ msg.len = data_size + 1;
+
+ dev_dbg(&sensor->i2c_client->dev, "[wr %02x] <= %*ph\n",
+ (u32)addr, data_size, data);
+
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ if (ret < 0) {
+ v4l2_err(&sensor->sd,
+ "%s: error %d: addr=%x, data=%*ph\n",
+ __func__, ret, (u32)addr, data_size, data);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int gc2145_read_regs(struct gc2145_dev *sensor, u8 addr,
+ u8 *data, int data_size)
+{
+ struct i2c_client *client = sensor->i2c_client;
+ struct i2c_msg msg[2];
+ int ret;
+
+ msg[0].addr = client->addr;
+ msg[0].flags = client->flags;
+ msg[0].buf = &addr;
+ msg[0].len = 1;
+
+ msg[1].addr = client->addr;
+ msg[1].flags = client->flags | I2C_M_RD;
+ msg[1].buf = data;
+ msg[1].len = data_size;
+
+ ret = i2c_transfer(client->adapter, msg, 2);
+ if (ret < 0) {
+ v4l2_err(&sensor->sd,
+ "%s: error %d: start_index=%x, data_size=%d\n",
+ __func__, ret, (u32)addr, data_size);
+ return ret;
+ }
+
+ dev_dbg(&sensor->i2c_client->dev, "[rd %02x] => %*ph\n",
+ (u32)addr, data_size, data);
+
+ return 0;
+}
+
+static int gc2145_switch_bank(struct gc2145_dev *sensor, u16 reg)
+{
+ int ret;
+ u8 bank = reg >> 8;
+
+ if (bank & ~3u)
+ return -ERANGE;
+
+ if (sensor->current_bank != bank) {
+ ret = gc2145_write_regs(sensor, GC2145_REG_RESET, &bank, 1);
+ if (ret)
+ return ret;
+
+ sensor->current_bank = bank;
+ dev_info(&sensor->i2c_client->dev, "bank switch: 0x%02x\n",
+ (unsigned int)sensor->current_bank);
+ }
+
+ return 0;
+}
+
+static int gc2145_read(struct gc2145_dev *sensor, u16 reg, u8 *val)
+{
+ int ret;
+
+ ret = gc2145_switch_bank(sensor, reg);
+ if (ret)
+ return ret;
+
+ return gc2145_read_regs(sensor, reg, val, 1);
+}
+
+static int gc2145_write(struct gc2145_dev *sensor, u16 reg, u8 val)
+{
+ int ret;
+
+ ret = gc2145_switch_bank(sensor, reg);
+ if (ret)
+ return ret;
+
+ if ((reg & 0xffu) == GC2145_REG_RESET)
+ sensor->current_bank = val & 3;
+
+ return gc2145_write_regs(sensor, reg, &val, 1);
+}
+
+static int gc2145_update_bits(struct gc2145_dev *sensor, u16 reg, u8 mask, u8 val)
+{
+ int ret;
+ u8 tmp;
+
+ ret = gc2145_read(sensor, reg, &tmp);
+ if (ret)
+ return ret;
+
+ tmp &= ~mask;
+ tmp |= val & mask;
+
+ return gc2145_write(sensor, reg, tmp);
+}
+
+static int gc2145_read16(struct gc2145_dev *sensor, u16 reg, u16 *val)
+{
+ int ret;
+
+ ret = gc2145_switch_bank(sensor, reg);
+ if (ret)
+ return ret;
+
+ ret = gc2145_read_regs(sensor, reg, (u8 *)val, sizeof(*val));
+ if (ret)
+ return ret;
+
+ *val = be16_to_cpu(*val);
+ return 0;
+}
+
+static int gc2145_write16(struct gc2145_dev *sensor, u16 reg, u16 val)
+{
+ u16 tmp = cpu_to_be16(val);
+ int ret;
+
+ ret = gc2145_switch_bank(sensor, reg);
+ if (ret)
+ return ret;
+
+ return gc2145_write_regs(sensor, reg, (u8 *)&tmp, sizeof(tmp));
+}
+
+static void gc2145_tx_start(struct gc2145_dev *sensor)
+{
+ if (sensor->tx_started++)
+ dev_err(&sensor->i2c_client->dev,
+ "tx_start called multiple times\n");
+
+ sensor->n_ops = 0;
+}
+
+static void gc2145_tx_add(struct gc2145_dev *sensor, int kind,
+ u16 reg, u16 val, u16 mask)
+{
+ struct gc2145_tx_op *op;
+
+ if (!sensor->tx_started) {
+ dev_err(&sensor->i2c_client->dev,
+ "op added without calling tx_start\n");
+ return;
+ }
+
+ if (sensor->n_ops >= ARRAY_SIZE(sensor->ops)) {
+ dev_err(&sensor->i2c_client->dev,
+ "ops overflow, increase GC2145_MAX_OPS\n");
+ return;
+ }
+
+ op = &sensor->ops[sensor->n_ops++];
+ op->op = kind;
+ op->reg = reg;
+ op->val = val;
+ op->mask = mask;
+}
+
+static void gc2145_tx_write8(struct gc2145_dev *sensor, u16 reg, u8 val)
+{
+ return gc2145_tx_add(sensor, TX_WRITE, reg, val, 0);
+}
+
+static void gc2145_tx_write16(struct gc2145_dev *sensor, u16 reg, u16 val)
+{
+ return gc2145_tx_add(sensor, TX_WRITE16, reg, val, 0);
+}
+
+static void gc2145_tx_update_bits(struct gc2145_dev *sensor, u16 reg,
+ u8 mask, u8 val)
+{
+ return gc2145_tx_add(sensor, TX_UPDATE_BITS, reg, val, mask);
+}
+
+static int gc2145_tx_commit(struct gc2145_dev *sensor)
+{
+ struct gc2145_tx_op* op;
+ int i, ret, n_ops;
+
+ if (!sensor->tx_started) {
+ dev_err(&sensor->i2c_client->dev,
+ "tx_commit called without tx_start\n");
+ return 0;
+ }
+
+ n_ops = sensor->n_ops;
+ sensor->tx_started = 0;
+ sensor->n_ops = 0;
+
+ for (i = 0; i < n_ops; i++) {
+ op = &sensor->ops[i];
+
+ switch (op->op) {
+ case TX_WRITE:
+ ret = gc2145_write(sensor, op->reg, op->val);
+ break;
+ case TX_WRITE16:
+ ret = gc2145_write16(sensor, op->reg, op->val);
+ break;
+ case TX_UPDATE_BITS:
+ ret = gc2145_update_bits(sensor, op->reg, op->mask, op->val);
+ break;
+ default:
+ dev_err(&sensor->i2c_client->dev, "invalid op at %d\n", i);
+ ret = -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * Efficiently write to a set of registers, using auto-increment
+ * when possible. User must not use address 0xff. To switch banks,
+ * use sequence: 0xfe, bank_no.
+ */
+static int gc2145_set_registers(struct gc2145_dev *sensor,
+ const uint8_t* data, size_t data_len)
+{
+ int ret = 0, i = 0;
+ u16 start, len;
+ u8 buf[128];
+
+ if (data_len % 2 != 0) {
+ v4l2_err(&sensor->sd, "Register map has invalid size\n");
+ return -EINVAL;
+ }
+
+ /* we speed up communication by using auto-increment functionality */
+ while (i < data_len) {
+ start = data[i];
+ len = 0;
+
+ while (i < data_len && data[i] == (start + len) &&
+ len < sizeof(buf)) {
+ buf[len++] = data[i + 1];
+ i += 2;
+ }
+
+ ret = gc2145_write_regs(sensor, start, buf, len);
+ if (ret)
+ return ret;
+ }
+
+ sensor->current_bank = 0xff;
+ return 0;
+}
+
+/*
+ * The firmware format:
+ * <record 0>, ..., <record N - 1>
+ * "record" is a 1-byte register address followed by 1-byte data
+ */
+static int gc2145_load_firmware(struct gc2145_dev *sensor, const char *name)
+{
+ const struct firmware *fw;
+ int ret;
+
+ ret = request_firmware(&fw, name, sensor->sd.v4l2_dev->dev);
+ if (ret) {
+ v4l2_warn(&sensor->sd,
+ "Failed to read firmware %s, continuing anyway...\n",
+ name);
+ return 1;
+ }
+
+ if (fw->size == 0)
+ return 1;
+
+ ret = gc2145_set_registers(sensor, fw->data, fw->size);
+
+ release_firmware(fw);
+ return ret;
+}
+
+/* }}} */
+/* {{{ Controls */
+
+static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
+{
+ return &container_of(ctrl->handler, struct gc2145_dev,
+ ctrls.handler)->sd;
+}
+
+#if 0
+static const u8 gc2145_wb_opts[][2] = {
+ { V4L2_WHITE_BALANCE_MANUAL, GC2145_REG_WB_MODE_OFF },
+ { V4L2_WHITE_BALANCE_INCANDESCENT, GC2145_REG_WB_MODE_TUNGSTEN_PRESET },
+ { V4L2_WHITE_BALANCE_FLUORESCENT,
+ GC2145_REG_WB_MODE_FLUORESCENT_PRESET },
+ { V4L2_WHITE_BALANCE_HORIZON, GC2145_REG_WB_MODE_HORIZON_PRESET },
+ { V4L2_WHITE_BALANCE_CLOUDY, GC2145_REG_WB_MODE_CLOUDY_PRESET },
+ { V4L2_WHITE_BALANCE_DAYLIGHT, GC2145_REG_WB_MODE_SUNNY_PRESET },
+ { V4L2_WHITE_BALANCE_AUTO, GC2145_REG_WB_MODE_AUTOMATIC },
+};
+
+static int gc2145_set_power_line_frequency(struct gc2145_dev *sensor, s32 val)
+{
+ u16 freq;
+ int ret;
+
+ switch (val) {
+ case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
+ ret = gc2145_write(sensor, GC2145_REG_ANTI_FLICKER_MODE, 0);
+ if (ret)
+ return ret;
+
+ return gc2145_write(sensor, GC2145_REG_FD_ENABLE_DETECT, 0);
+ case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
+ case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
+ ret = gc2145_write(sensor, GC2145_REG_ANTI_FLICKER_MODE, 1);
+ if (ret)
+ return ret;
+
+ ret = gc2145_write(sensor, GC2145_REG_FD_ENABLE_DETECT, 0);
+ if (ret)
+ return ret;
+
+ freq = (val == V4L2_CID_POWER_LINE_FREQUENCY_50HZ) ?
+ 0x4b20 : 0x4bc0;
+
+ return gc2145_write16(sensor, GC2145_REG_FD_FLICKER_FREQUENCY,
+ freq);
+ case V4L2_CID_POWER_LINE_FREQUENCY_AUTO:
+ ret = gc2145_write(sensor, GC2145_REG_FD_ENABLE_DETECT, 1);
+ if (ret)
+ return ret;
+
+ ret = gc2145_write(sensor, GC2145_REG_ANTI_FLICKER_MODE, 1);
+ if (ret)
+ return ret;
+
+ ret = gc2145_write16(sensor, GC2145_REG_FD_MAX_NUMBER_ATTEMP,
+ 100);
+ if (ret)
+ return ret;
+
+ ret = gc2145_write16(sensor, GC2145_REG_FD_FLICKER_FREQUENCY,
+ 0);
+ if (ret)
+ return ret;
+
+ return gc2145_write(sensor, GC2145_REG_FD_DETECTION_START, 1);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int gc2145_set_colorfx(struct gc2145_dev *sensor, s32 val)
+{
+ int ret;
+
+ ret = gc2145_write(sensor, GC2145_REG_EFFECTS_COLOR,
+ GC2145_REG_EFFECTS_COLOR_NORMAL);
+ if (ret)
+ return ret;
+
+ ret = gc2145_write(sensor, GC2145_REG_EFFECTS_NEGATIVE, 0);
+ if (ret)
+ return ret;
+
+ ret = gc2145_write(sensor, GC2145_REG_EFFECTS_SOLARISING, 0);
+ if (ret)
+ return ret;
+
+ ret = gc2145_write(sensor, GC2145_REG_EFFECTS_SKECTH, 0);
+ if (ret)
+ return ret;
+
+ switch (val) {
+ case V4L2_COLORFX_NONE:
+ return 0;
+ case V4L2_COLORFX_NEGATIVE:
+ return gc2145_write(sensor, GC2145_REG_EFFECTS_NEGATIVE, 1);
+ case V4L2_COLORFX_SOLARIZATION:
+ return gc2145_write(sensor, GC2145_REG_EFFECTS_SOLARISING, 1);
+ case V4L2_COLORFX_SKETCH:
+ return gc2145_write(sensor, GC2145_REG_EFFECTS_SKECTH, 1);
+ case V4L2_COLORFX_ANTIQUE:
+ return gc2145_write(sensor, GC2145_REG_EFFECTS_COLOR,
+ GC2145_REG_EFFECTS_COLOR_ANTIQUE);
+ case V4L2_COLORFX_SEPIA:
+ return gc2145_write(sensor, GC2145_REG_EFFECTS_COLOR,
+ GC2145_REG_EFFECTS_COLOR_SEPIA);
+ case V4L2_COLORFX_AQUA:
+ return gc2145_write(sensor, GC2145_REG_EFFECTS_COLOR,
+ GC2145_REG_EFFECTS_COLOR_AQUA);
+ case V4L2_COLORFX_BW:
+ return gc2145_write(sensor, GC2145_REG_EFFECTS_COLOR,
+ GC2145_REG_EFFECTS_COLOR_BLACK_WHITE);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int gc2145_3a_lock(struct gc2145_dev *sensor, struct v4l2_ctrl *ctrl)
+{
+ bool awb_lock = ctrl->val & V4L2_LOCK_WHITE_BALANCE;
+ bool ae_lock = ctrl->val & V4L2_LOCK_EXPOSURE;
+ int ret = 0;
+
+ if ((ctrl->val ^ ctrl->cur.val) & V4L2_LOCK_EXPOSURE
+ && sensor->ctrls.auto_exposure->val == V4L2_EXPOSURE_AUTO) {
+ ret = gc2145_write(sensor, GC2145_REG_FREEZE_AUTO_EXPOSURE,
+ ae_lock);
+ if (ret)
+ return ret;
+ }
+
+ if (((ctrl->val ^ ctrl->cur.val) & V4L2_LOCK_WHITE_BALANCE)
+ && sensor->ctrls.wb->val == V4L2_WHITE_BALANCE_AUTO) {
+ ret = gc2145_write(sensor, GC2145_REG_WB_MISC_SETTINGS,
+ awb_lock ?
+ GC2145_REG_WB_MISC_SETTINGS_FREEZE_ALGO : 0);
+ if (ret)
+ return ret;
+ }
+
+ return ret;
+}
+
+static int gc2145_set_white_balance(struct gc2145_dev *sensor)
+{
+ struct gc2145_ctrls *ctrls = &sensor->ctrls;
+ bool manual_wb = ctrls->wb->val == V4L2_WHITE_BALANCE_MANUAL;
+ int ret = 0, i;
+ s32 val;
+
+ if (ctrls->wb->is_new) {
+ for (i = 0; i < ARRAY_SIZE(gc2145_wb_opts); i++) {
+ if (gc2145_wb_opts[i][0] != ctrls->wb->val)
+ continue;
+
+ ret = gc2145_write(sensor, GC2145_REG_WB_MODE,
+ gc2145_wb_opts[i][1]);
+ if (ret)
+ return ret;
+ goto next;
+ }
+
+ return -EINVAL;
+ }
+
+next:
+ if (ctrls->wb->is_new || ctrls->blue_balance->is_new) {
+ val = manual_wb ? ctrls->blue_balance->val : 1000;
+ ret = gc2145_write16(sensor, GC2145_REG_WB_HUE_B_BIAS,
+ gc2145_mili_to_fp16(val));
+ if (ret)
+ return ret;
+ }
+
+ if (ctrls->wb->is_new || ctrls->red_balance->is_new) {
+ val = manual_wb ? ctrls->red_balance->val : 1000;
+ ret = gc2145_write16(sensor, GC2145_REG_WB_HUE_R_BIAS,
+ gc2145_mili_to_fp16(val));
+ }
+
+ return ret;
+}
+
+#endif
+
+/* Exposure */
+
+static int gc2145_get_exposure(struct gc2145_dev *sensor)
+{
+ struct gc2145_ctrls *ctrls = &sensor->ctrls;
+ u8 again, dgain;
+ u16 exp;
+ int ret;
+
+ ret = gc2145_read(sensor, 0xb1, &again);
+ if (ret)
+ return ret;
+
+ ret = gc2145_read(sensor, 0xb2, &dgain);
+ if (ret)
+ return ret;
+
+ ret = gc2145_read16(sensor, 0x03, &exp);
+ if (ret)
+ return ret;
+
+ ctrls->exposure->val = exp;
+ ctrls->d_gain->val = dgain;
+ ctrls->a_gain->val = again;
+
+ return 0;
+}
+
+#define AE_BIAS_MENU_DEFAULT_VALUE_INDEX 4
+static const s64 ae_bias_menu_values[] = {
+ -4000, -3000, -2000, -1000, 0, 1000, 2000, 3000, 4000
+};
+
+static const s8 ae_bias_menu_reg_values[] = {
+ 0x55, 0x60, 0x65, 0x70, 0x7b, 0x85, 0x90, 0x95, 0xa0
+};
+
+static int gc2145_set_exposure(struct gc2145_dev *sensor)
+{
+ struct gc2145_ctrls *ctrls = &sensor->ctrls;
+ bool is_auto = (ctrls->auto_exposure->val != V4L2_EXPOSURE_MANUAL);
+
+ gc2145_tx_start(sensor);
+
+ if (ctrls->auto_exposure->is_new) {
+ gc2145_tx_write8(sensor, 0xb6, is_auto ? 1 : 0);
+
+ //XXX: remove?
+ //if (ctrls->auto_exposure->cur.val != ctrls->auto_exposure->val &&
+ //!is_auto) {
+ /*
+ * Hack: At this point, there are current volatile
+ * values in val, but control framework will not
+ * update the cur values for our autocluster, as it
+ * should. I couldn't find the reason. This fixes
+ * it for our driver. Remove this after the kernel
+ * is fixed.
+ */
+ //ctrls->exposure->cur.val = ctrls->exposure->val;
+ //ctrls->d_gain->cur.val = ctrls->d_gain->val;
+ //ctrls->a_gain->cur.val = ctrls->a_gain->val;
+ //}
+ }
+
+ if (!is_auto && ctrls->exposure->is_new)
+ gc2145_tx_write16(sensor, 0x03, ctrls->exposure->val);
+
+ if (!is_auto && ctrls->d_gain->is_new)
+ gc2145_tx_write8(sensor, 0xb2, ctrls->d_gain->val);
+
+ if (!is_auto && ctrls->a_gain->is_new)
+ gc2145_tx_write8(sensor, 0xb1, ctrls->a_gain->val);
+
+ return gc2145_tx_commit(sensor);;
+}
+
+/* Test patterns */
+
+enum {
+ GC2145_TEST_PATTERN_DISABLED,
+ GC2145_TEST_PATTERN_VGA_COLOR_BARS,
+ GC2145_TEST_PATTERN_UXGA_COLOR_BARS,
+ GC2145_TEST_PATTERN_SKIN_MAP,
+ GC2145_TEST_PATTERN_SOLID_COLOR,
+};
+
+static const char * const test_pattern_menu[] = {
+ "Disabled",
+ "VGA color bars",
+ "UXGA color bars",
+ "Skin map",
+ "Solid black color",
+ "Solid light gray color",
+ "Solid gray color",
+ "Solid dark gray color",
+ "Solid white color",
+ "Solid red color",
+ "Solid green color",
+ "Solid blue color",
+ "Solid yellow color",
+ "Solid cyan color",
+ "Solid magenta color",
+};
+
+static int gc2145_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
+ struct gc2145_dev *sensor = to_gc2145_dev(sd);
+ int ret;
+
+ /* v4l2_ctrl_lock() locks our own mutex */
+
+ if (!sensor->powered)
+ return -EIO;
+
+ switch (ctrl->id) {
+ case V4L2_CID_EXPOSURE_AUTO:
+ ret = gc2145_get_exposure(sensor);
+ if (ret)
+ return ret;
+ break;
+ default:
+ dev_err(&sensor->i2c_client->dev, "getting unknown control %d\n", ctrl->id);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int gc2145_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
+ struct gc2145_dev *sensor = to_gc2145_dev(sd);
+ struct gc2145_ctrls *ctrls = &sensor->ctrls;
+ s32 val = ctrl->val;
+ unsigned int i;
+ int ret;
+ u8 test1, test2;
+
+ /* v4l2_ctrl_lock() locks our own mutex */
+
+ /*
+ * If the device is not powered up by the host driver do
+ * not apply any controls to H/W at this time. Instead
+ * the controls will be restored right after power-up.
+ */
+ if (!sensor->powered)
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_EXPOSURE_AUTO:
+ return gc2145_set_exposure(sensor);
+
+ case V4L2_CID_AUTO_EXPOSURE_BIAS:
+ if (val < 0 || val >= ARRAY_SIZE(ae_bias_menu_reg_values)) {
+ dev_err(&sensor->i2c_client->dev, "ae bias out of range\n");
+ return -EINVAL;
+ }
+
+ return gc2145_write(sensor, 0x113,
+ (u8)ae_bias_menu_reg_values[val]);
+
+ case V4L2_CID_VFLIP:
+ return gc2145_update_bits(sensor, 0x17, BIT(1), val ? BIT(1) : 0);
+
+ case V4L2_CID_HFLIP:
+ return gc2145_update_bits(sensor, 0x17, BIT(0), val ? BIT(0) : 0);
+
+ case V4L2_CID_TEST_PATTERN:
+ for (i = 0; i < ARRAY_SIZE(ctrls->test_data); i++)
+ v4l2_ctrl_activate(ctrls->test_data[i],
+ val == 6); /* solid color */
+
+ test1 = 0;
+ test2 = 0x01;
+
+ if (val == GC2145_TEST_PATTERN_VGA_COLOR_BARS)
+ test1 = 0x04;
+ else if (val == GC2145_TEST_PATTERN_UXGA_COLOR_BARS)
+ test1 = 0x44;
+ else if (val == GC2145_TEST_PATTERN_SKIN_MAP)
+ test1 = 0x10;
+ else if (val >= GC2145_TEST_PATTERN_SOLID_COLOR) {
+ test1 = 0x04;
+ test2 = ((val - GC2145_TEST_PATTERN_SOLID_COLOR) << 4) | 0x8;
+ } else if (val != GC2145_TEST_PATTERN_DISABLED) {
+ dev_err(&sensor->i2c_client->dev, "test pattern out of range\n");
+ return -EINVAL;
+ }
+
+ ret = gc2145_write(sensor, 0x8c, test1);
+ if (ret)
+ return ret;
+
+ return gc2145_write(sensor, 0x8d, test2);
+
+#if 0
+ case V4L2_CID_EXPOSURE_METERING:
+ if (val == V4L2_EXPOSURE_METERING_AVERAGE)
+ reg = GC2145_REG_EXPOSURE_METERING_FLAT;
+ else if (val == V4L2_EXPOSURE_METERING_CENTER_WEIGHTED)
+ reg = GC2145_REG_EXPOSURE_METERING_CENTERED;
+ else
+ return -EINVAL;
+
+ return gc2145_write(sensor, GC2145_REG_EXPOSURE_METERING, reg);
+
+ case V4L2_CID_CONTRAST:
+ return gc2145_write(sensor, GC2145_REG_CONTRAST, val);
+
+ case V4L2_CID_SATURATION:
+ return gc2145_write(sensor, GC2145_REG_COLOR_SATURATION, val);
+
+ case V4L2_CID_BRIGHTNESS:
+ return gc2145_write(sensor, GC2145_REG_BRIGHTNESS, val);
+
+ case V4L2_CID_POWER_LINE_FREQUENCY:
+ return gc2145_set_power_line_frequency(sensor, val);
+
+ case V4L2_CID_GAMMA:
+ return gc2145_write(sensor, GC2145_REG_P0_GAMMA_GAIN, val);
+
+ case V4L2_CID_COLORFX:
+ return gc2145_set_colorfx(sensor, val);
+
+ case V4L2_CID_3A_LOCK:
+ return gc2145_3a_lock(sensor, ctrl);
+
+ case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
+ return gc2145_set_white_balance(sensor);
+
+ case V4L2_CID_TEST_PATTERN_RED:
+ return gc2145_write16(sensor, GC2145_REG_TESTDATA_RED, val);
+
+ case V4L2_CID_TEST_PATTERN_GREENR:
+ return gc2145_write16(sensor, GC2145_REG_TESTDATA_GREEN_R, val);
+
+ case V4L2_CID_TEST_PATTERN_BLUE:
+ return gc2145_write16(sensor, GC2145_REG_TESTDATA_BLUE, val);
+
+ case V4L2_CID_TEST_PATTERN_GREENB:
+ return gc2145_write16(sensor, GC2145_REG_TESTDATA_GREEN_B, val);
+
+#endif
+ default:
+ dev_err(&sensor->i2c_client->dev, "setting unknown control %d\n", ctrl->id);
+ return -EINVAL;
+ }
+}
+
+static const struct v4l2_ctrl_ops gc2145_ctrl_ops = {
+ .g_volatile_ctrl = gc2145_g_volatile_ctrl,
+ .s_ctrl = gc2145_s_ctrl,
+};
+
+static int gc2145_init_controls(struct gc2145_dev *sensor)
+{
+ const struct v4l2_ctrl_ops *ops = &gc2145_ctrl_ops;
+ struct gc2145_ctrls *ctrls = &sensor->ctrls;
+ struct v4l2_ctrl_handler *hdl = &ctrls->handler;
+ //u8 wb_max = 0;
+ //u64 wb_mask = 0;
+ //unsigned int i;
+ int ret;
+
+ v4l2_ctrl_handler_init(hdl, 32);
+
+ /* we can use our own mutex for the ctrl lock */
+ hdl->lock = &sensor->lock;
+
+ /* Exposure controls */
+ ctrls->auto_exposure = v4l2_ctrl_new_std_menu(hdl, ops,
+ V4L2_CID_EXPOSURE_AUTO,
+ V4L2_EXPOSURE_MANUAL, 0,
+ V4L2_EXPOSURE_AUTO);
+ ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
+ 1, 0x1fff, 1, 0x80);
+ ctrls->a_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN,
+ 0, 255, 1, 0x20);
+ ctrls->d_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_DIGITAL_GAIN,
+ 0, 255, 1, 0x40);
+ ctrls->exposure_bias =
+ v4l2_ctrl_new_int_menu(hdl, ops, V4L2_CID_AUTO_EXPOSURE_BIAS,
+ ARRAY_SIZE(ae_bias_menu_values) - 1,
+ AE_BIAS_MENU_DEFAULT_VALUE_INDEX,
+ ae_bias_menu_values);
+
+ /* V/H flips */
+ ctrls->hflip = v4l2_ctrl_new_std(hdl, ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ ctrls->vflip = v4l2_ctrl_new_std(hdl, ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+
+
+ /* Test patterns */
+ ctrls->test_pattern =
+ v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(test_pattern_menu) - 1,
+ 0, 0, test_pattern_menu);
+#if 0
+
+ ctrls->metering =
+ v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_EXPOSURE_METERING,
+ V4L2_EXPOSURE_METERING_CENTER_WEIGHTED,
+ 0, V4L2_EXPOSURE_METERING_AVERAGE);
+
+ for (i = 0; i < ARRAY_SIZE(gc2145_wb_opts); i++) {
+ if (wb_max < gc2145_wb_opts[i][0])
+ wb_max = gc2145_wb_opts[i][0];
+ wb_mask |= BIT(gc2145_wb_opts[i][0]);
+ }
+
+ ctrls->wb = v4l2_ctrl_new_std_menu(hdl, ops,
+ V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE,
+ wb_max, ~wb_mask, V4L2_WHITE_BALANCE_AUTO);
+
+ ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE,
+ 0, 4000, 1, 1000);
+ ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE,
+ 0, 4000, 1, 1000);
+
+ ctrls->gamma = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAMMA,
+ 0, 31, 1, 20);
+
+ ctrls->colorfx =
+ v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_COLORFX, 15,
+ ~(BIT(V4L2_COLORFX_NONE) |
+ BIT(V4L2_COLORFX_NEGATIVE) |
+ BIT(V4L2_COLORFX_SOLARIZATION) |
+ BIT(V4L2_COLORFX_SKETCH) |
+ BIT(V4L2_COLORFX_SEPIA) |
+ BIT(V4L2_COLORFX_ANTIQUE) |
+ BIT(V4L2_COLORFX_AQUA) |
+ BIT(V4L2_COLORFX_BW)),
+ V4L2_COLORFX_NONE);
+
+ ctrls->pl_freq =
+ v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_POWER_LINE_FREQUENCY,
+ V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
+ V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
+
+ ctrls->brightness = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS,
+ 0, 200, 1, 90);
+ ctrls->saturation = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION,
+ 0, 200, 1, 110);
+ ctrls->contrast = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST,
+ 0, 200, 1, 108);
+
+ ctrls->aaa_lock = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_3A_LOCK,
+ 0, 0x7, 0, 0);
+
+ for (i = 0; i < ARRAY_SIZE(ctrls->test_data); i++)
+ ctrls->test_data[i] =
+ v4l2_ctrl_new_std(hdl, ops,
+ V4L2_CID_TEST_PATTERN_RED + i,
+ 0, 1023, 1, 0);
+
+ ctrls->af_status->flags |= V4L2_CTRL_FLAG_VOLATILE |
+ V4L2_CTRL_FLAG_READ_ONLY;
+
+ v4l2_ctrl_auto_cluster(3, &ctrls->wb, V4L2_WHITE_BALANCE_MANUAL, false);
+#endif
+
+ v4l2_ctrl_auto_cluster(4, &ctrls->auto_exposure, V4L2_EXPOSURE_MANUAL,
+ true);
+
+ if (hdl->error) {
+ ret = hdl->error;
+ goto free_ctrls;
+ }
+
+ sensor->sd.ctrl_handler = hdl;
+ return 0;
+
+free_ctrls:
+ v4l2_ctrl_handler_free(hdl);
+ return ret;
+}
+
+/* }}} */
+/* {{{ Video ops */
+
+static int gc2145_g_frame_interval(struct v4l2_subdev *sd,
+ struct v4l2_subdev_frame_interval *fi)
+{
+ struct gc2145_dev *sensor = to_gc2145_dev(sd);
+
+ if (fi->pad != 0)
+ return -EINVAL;
+
+ mutex_lock(&sensor->lock);
+ fi->interval = sensor->frame_interval;
+ mutex_unlock(&sensor->lock);
+
+ return 0;
+}
+
+static int gc2145_s_frame_interval(struct v4l2_subdev *sd,
+ struct v4l2_subdev_frame_interval *fi)
+{
+ struct gc2145_dev *sensor = to_gc2145_dev(sd);
+ int ret = 0, fps;
+
+ if (fi->pad != 0)
+ return -EINVAL;
+
+ mutex_lock(&sensor->lock);
+
+ /* user requested infinite frame rate */
+ if (fi->interval.numerator == 0)
+ fps = 60;
+ else
+ fps = DIV_ROUND_CLOSEST(fi->interval.denominator,
+ fi->interval.numerator);
+
+ fps = clamp(fps, 1, 60);
+
+ sensor->frame_interval.numerator = 1;
+ sensor->frame_interval.denominator = fps;
+ fi->interval = sensor->frame_interval;
+
+#if 0
+ if (sensor->streaming) {
+ ret = gc2145_write16(sensor, GC2145_REG_DESIRED_FRAME_RATE_NUM,
+ fps);
+ if (ret)
+ goto err_unlock;
+ }
+err_unlock:
+#endif
+
+ mutex_unlock(&sensor->lock);
+ return ret;
+}
+
+/*
+ * Clock tree
+ * ----------
+ *
+ * MCLK pin
+ * |
+ * DIV2 (optional) - Divide input MCLK by 2 when 0xf7[1] == 1
+ * |
+ * /- PLL mux -\ - PLL selected by 0xf8[7], otherwise fixed 32x mult
+ * | |
+ * PLL | - PLL multiplies by 0xf8[5:0]+1 * 4
+ * | Fixed 32/48x - Multiplies 32x when 0xf7[2] == 1 otherwise 48x
+ * \_________/
+ * |
+ * DOUBLE (div by 4 or 8) based on 0xf7[3]
+ * |
+ * /-------\
+ * | |
+ * pclk_div sclk_div
+ * | |
+ * 2pclk sclk
+ */
+__maybe_unused
+static int gc2145_get_2pclk(struct gc2145_dev *sensor, unsigned long* pclk)
+{
+ u8 pll_mode1, pll_mode2, clk_div_mode;
+ bool mclk_div2_en; // 0xf7[1]
+ bool pll_en; // 0xf8[7]
+ bool double_clk; // 0xf7[3]
+ bool fixed_32x; // 0xf7[2]
+ unsigned long pll_mult; // 0xf8[5:0] + 1
+ unsigned long sclk_div; // 1 << (0xf7[5:4] + 1)
+ unsigned long pclk_div; // 0xfa[7:4] + 1
+ unsigned long int_clk;
+ unsigned long mclk;
+ int ret;
+
+ ret = gc2145_read(sensor, 0xf7, &pll_mode1);
+ if (ret)
+ return ret;
+
+ ret = gc2145_read(sensor, 0xf8, &pll_mode2);
+ if (ret)
+ return ret;
+
+ ret = gc2145_read(sensor, 0xfa, &clk_div_mode);
+ if (ret)
+ return ret;
+
+ mclk = clk_get_rate(sensor->xclk);
+ if (mclk == 0)
+ return -EINVAL;
+
+ mclk_div2_en = pll_mode1 & BIT(1);
+ pll_en = pll_mode2 & BIT(7);
+ double_clk = pll_mode1 & BIT(3);
+ fixed_32x = pll_mode1 & BIT(2);
+ pll_mult = (pll_mode2 & 0x3f) + 1;
+ pclk_div = (clk_div_mode >> 4) + 1;
+ sclk_div = 1 << (((pll_mode1 >> 4) & 0x3) + 1);
+
+ int_clk = mclk / (mclk_div2_en ? 2 : 1);
+
+ if (pll_en)
+ int_clk *= pll_mult * 4;
+ else
+ int_clk *= fixed_32x ? 32 : 48;
+
+ int_clk /= double_clk ? 4 : 8;
+
+ if (pclk)
+ *pclk = int_clk / pclk_div;
+
+ return 0;
+}
+
+static int gc2145_set_2pclk(struct gc2145_dev *sensor,
+ unsigned long *freq, bool apply)
+{
+ unsigned long pll_mult, pll_mult_max, /*sclk_div,*/ pclk_div, pclk2,/* sclk,*/
+ mclk;
+ unsigned long pll_mult_best = 0, pclk_div_best = 0, diff_best = ULONG_MAX, diff,
+ pclk2_best = 0;
+ int mclk_div2_en; //, double_clk;
+ int mclk_div2_en_best = 0; //, double_clk_best;
+
+ mclk = clk_get_rate(sensor->xclk);
+ if (mclk == 0)
+ return -EINVAL;
+
+ for (mclk_div2_en = 0; mclk_div2_en <= 1; mclk_div2_en++) {
+ pll_mult_max = 768000000 / 4 / (mclk / (mclk_div2_en ? 2 : 1));
+ if (pll_mult_max > 32)
+ pll_mult_max = 32;
+
+ for (pll_mult = 2; pll_mult <= pll_mult_max; pll_mult++) {
+ for (pclk_div = 1; pclk_div <= 8; pclk_div++) {
+ pclk2 = mclk / (mclk_div2_en ? 2 : 1) * pll_mult / pclk_div;
+
+ if (pclk2 > *freq)
+ continue;
+
+ diff = *freq - pclk2;
+
+ if (diff < diff_best) {
+ diff_best = diff;
+ pclk2_best = pclk2;
+
+ pll_mult_best = pll_mult;
+ pclk_div_best = pclk_div;
+ mclk_div2_en_best = mclk_div2_en;
+ }
+
+ if (diff == 0)
+ goto found;
+ }
+ }
+ }
+
+ if (diff_best == ULONG_MAX)
+ return -1;
+
+found:
+ *freq = pclk2_best;
+ if (!apply)
+ return 0;
+
+ gc2145_tx_start(sensor);
+
+ gc2145_tx_write8(sensor, 0xf7,
+ ((pclk_div_best - 1)) << 4 |
+ (mclk_div2_en_best << 1) | BIT(0) /* pll_en */);
+ gc2145_tx_write8(sensor, 0xf8, BIT(7) | (pll_mult_best - 1));
+ gc2145_tx_write8(sensor, 0xfa,
+ (pclk_div_best - 1) << 4 |
+ (((pclk_div_best - 1) / 2) & 0xf));
+
+ return gc2145_tx_commit(sensor);
+}
+
+static int gc2145_setup_awb(struct gc2145_dev *sensor,
+ u16 x1, u16 y1, u16 x2, u16 y2)
+{
+ int ratio = 8; //XXX: manual for gc2035 FAE says 4
+
+ gc2145_tx_start(sensor);
+
+ // disable awb
+ gc2145_tx_update_bits(sensor, 0x82, BIT(1), 0);
+
+ // reset white balance RGB gains
+ gc2145_tx_write8(sensor, 0xb3, 0x40);
+ gc2145_tx_write8(sensor, 0xb4, 0x40);
+ gc2145_tx_write8(sensor, 0xb5, 0x40);
+
+ // awb window
+ gc2145_tx_write8(sensor, 0x1ec, x1 / ratio);
+ gc2145_tx_write8(sensor, 0x1ed, y1 / ratio);
+ gc2145_tx_write8(sensor, 0x1ee, x2 / ratio);
+ gc2145_tx_write8(sensor, 0x1ef, y2 / ratio);
+
+ // eanble awb
+ gc2145_tx_update_bits(sensor, 0x82, BIT(1), BIT(1));
+
+ //1051 { 0xfe, 0x01 },
+ //1052 { 0x74, 0x01 },
+
+ return gc2145_tx_commit(sensor);
+}
+
+static int gc2145_setup_aec(struct gc2145_dev *sensor,
+ u16 x1, u16 y1, u16 x2, u16 y2,
+ u16 cx1, u16 cy1, u16 cx2, u16 cy2)
+{
+ u16 x_ratio = 8;
+
+ //XXX: gc2035 has x ratio 16
+ //XXX: gc2035 doesn't have low light mode
+ gc2145_tx_start(sensor);
+
+ // disable AEC
+ gc2145_tx_write8(sensor, 0xb6, 0);
+
+ // set reasonable initial exposure and gains
+ gc2145_tx_write16(sensor, 0x03, 1200);
+ gc2145_tx_write8(sensor, 0xb1, 0x20);
+ gc2145_tx_write8(sensor, 0xb2, 0xe0);
+
+ // setup measure window
+ gc2145_tx_write8(sensor, 0x101, x1 / x_ratio);
+ gc2145_tx_write8(sensor, 0x102, x2 / x_ratio);
+ gc2145_tx_write8(sensor, 0x103, y1 / 8);
+ gc2145_tx_write8(sensor, 0x104, y2 / 8);
+
+ // setup center
+ gc2145_tx_write8(sensor, 0x105, cx1 / x_ratio);
+ gc2145_tx_write8(sensor, 0x106, cx2 / x_ratio);
+ gc2145_tx_write8(sensor, 0x107, cy1 / 8);
+ gc2145_tx_write8(sensor, 0x108, cy2 / 8);
+
+ // increase maximum exposure level to 4
+ //gc2145_tx_write8(sensor, 0x13c, 0x60);
+ // setup AEC mode: measure point, adjust_max_gain, skip_mode = 2
+ //gc2145_tx_write8(sensor, 0x10a, 0xc2);
+
+ // AEC_ASDE_select_luma_value AEC_low_light_exp_THD_max:
+ //gc2145_tx_write8(sensor, 0x121, 0x15);
+
+ // enable AEC again
+ gc2145_tx_write8(sensor, 0xb6, 1);
+
+ return gc2145_tx_commit(sensor);
+}
+
+struct gc2145_sensor_params {
+ unsigned int enable_scaler;
+ unsigned int col_scaler_only;
+ unsigned int row_skip;
+ unsigned int col_skip;
+ unsigned long sh_delay;
+ unsigned long hb;
+ unsigned long vb;
+ unsigned long st;
+ unsigned long et;
+ unsigned long win_width;
+ unsigned long win_height;
+ unsigned long width;
+ unsigned long height;
+};
+
+static void gc2145_sensor_params_init(struct gc2145_sensor_params* p, int width, int height)
+{
+ p->win_height = height + 32;
+ p->win_width = (width + 16);
+ p->width = width;
+ p->height = height;
+ p->st = 2;
+ p->et = 2;
+ p->vb = 8;
+ p->hb = 0x1f0;
+ p->sh_delay = 30;
+}
+
+// unit is PCLK periods
+static unsigned long
+gc2145_sensor_params_get_row_period(struct gc2145_sensor_params* p)
+{
+ return 2 * (p->win_width / 2 / (p->col_skip + 1) + p->sh_delay + p->hb + 4);
+}
+
+static unsigned long
+gc2145_sensor_params_get_frame_period(struct gc2145_sensor_params* p)
+{
+ unsigned long rt = gc2145_sensor_params_get_row_period(p);
+
+ return rt * (p->vb + p->win_height) / (p->row_skip + 1);
+}
+
+static void
+gc2145_sensor_params_fit_hb_to_power_line_period(struct gc2145_sensor_params* p,
+ unsigned long power_line_freq,
+ unsigned long pclk)
+{
+ unsigned long rt, power_line_ratio;
+
+ for (p->hb = 0x1f0; p->hb < 2047; p->hb++) {
+ rt = gc2145_sensor_params_get_row_period(p);
+
+ // power_line_ratio is row_freq / power_line_freq * 1000
+ power_line_ratio = pclk / power_line_freq * 1000 / rt;
+
+ // if we're close enough, stop the search
+ if (power_line_ratio % 1000 < 50)
+ break;
+ }
+
+ // finding the optimal Hb is not critical
+ if (p->hb == 2047)
+ p->hb = 0x1f0;
+}
+
+static void
+gc2145_sensor_params_fit_vb_to_frame_period(struct gc2145_sensor_params* p,
+ unsigned long frame_period)
+{
+ unsigned long rt, fp;
+
+ p->vb = 8;
+ rt = gc2145_sensor_params_get_row_period(p);
+ fp = gc2145_sensor_params_get_frame_period(p);
+
+ if (frame_period > fp)
+ p->vb = frame_period * (p->row_skip + 1) / rt - p->win_height;
+
+ if (p->vb > 4095)
+ p->vb = 4095;
+}
+
+static int gc2145_sensor_params_apply(struct gc2145_dev *sensor,
+ struct gc2145_sensor_params* p)
+{
+ u32 off_x = (GC2145_SENSOR_WIDTH_MAX - p->width) / 2;
+ u32 off_y = (GC2145_SENSOR_HEIGHT_MAX - p->height) / 2;
+
+ gc2145_tx_start(sensor);
+
+ gc2145_tx_write8(sensor, 0xfd, (p->enable_scaler ? BIT(0) : 0)
+ | (p->col_scaler_only ? BIT(1) : 0));
+
+ gc2145_tx_write8(sensor, 0x18, 0x0a
+ | (p->col_skip ? BIT(7) : 0)
+ | (p->row_skip ? BIT(6) : 0));
+
+ gc2145_tx_write16(sensor, 0x09, off_y);
+ gc2145_tx_write16(sensor, 0x0b, off_x);
+ gc2145_tx_write16(sensor, 0x0d, p->win_height);
+ gc2145_tx_write16(sensor, 0x0f, p->win_width);
+ gc2145_tx_write16(sensor, 0x05, p->hb);
+ gc2145_tx_write16(sensor, 0x07, p->vb);
+ gc2145_tx_write16(sensor, 0x11, p->sh_delay);
+
+ gc2145_tx_write8(sensor, 0x13, p->st);
+ gc2145_tx_write8(sensor, 0x14, p->et);
+
+ return gc2145_tx_commit(sensor);
+}
+
+static int gc2145_setup_mode(struct gc2145_dev *sensor)
+{
+ int scaling_desired, ret, pad, i;
+ struct gc2145_sensor_params params = {0};
+ unsigned long pclk2, frame_period;
+ unsigned long power_line_freq = 50;
+ unsigned long width = sensor->fmt.width;
+ unsigned long height = sensor->fmt.height;
+ unsigned long framerate = sensor->frame_interval.denominator;
+ const struct gc2145_pixfmt *pix_fmt;
+ unsigned long rt, ft, ft_rt;
+
+ pix_fmt = gc2145_find_format(sensor->fmt.code);
+ if (!pix_fmt) {
+ dev_err(&sensor->i2c_client->dev,
+ "pixel format not supported %u\n", sensor->fmt.code);
+ return -EINVAL;
+ }
+
+ /*
+ * Equations for calculating framerate are:
+ *
+ * ww = width + 16
+ * wh = height + 32
+ * Rt = (ww / 2 / (col_skip + 1) + sh_delay + Hb + 4)
+ * Ft = Rt * (Vb + wh) / (row_skip + 1)
+ * framerate = 2pclk / 4 / Ft
+ *
+ * Based on these equations:
+ *
+ * 1) First we need to determine what 2PCLK frequency to use. The 2PCLK
+ * frequency is not arbitrarily precise, so we need to calculate the
+ * actual frequency used, after setting our target frequency.
+ *
+ * We use a simple heuristic:
+ *
+ * If pixel_count * 2 * framerate * 1.15 is > 40MHz, we use 60MHz,
+ * otherwise we use 40MHz.
+ *
+ * 2) We want to determine lowest Hb that we can use to extend row
+ * period so that row time takes an integer fraction of the power
+ * line frequency period. Minimum Hb is 0x1f0.
+ *
+ * 3) If the requested resolution is less than half the sensor's size,
+ * we'll use scaling, or row skipping + column scaling, or row and
+ * column skiping, depending on what allows us to achieve the
+ * requested framerate.
+ *
+ * 4) We use the selected Hb to calculate Vb value that will give
+ * us the desired framerate, given the scaling/skipping option
+ * selected in 3).
+ */
+
+ scaling_desired = width <= GC2145_SENSOR_WIDTH_MAX / 2
+ && height <= GC2145_SENSOR_HEIGHT_MAX / 2;
+
+ pclk2 = 60000000;
+
+ ret = gc2145_set_2pclk(sensor, &pclk2, false);
+ if (ret < 0)
+ return ret;
+
+ gc2145_sensor_params_init(&params, width, height);
+
+ // if the resolution is < half the sensor size, enable the scaler
+ // to cover more area of the chip
+ if (scaling_desired) {
+ params.enable_scaler = 1;
+ pclk2 *= 2;
+ gc2145_sensor_params_init(&params, width * 2, height * 2);
+ }
+
+ // we need to call this each time pclk or power_line_freq is changed
+ gc2145_sensor_params_fit_hb_to_power_line_period(&params,
+ power_line_freq,
+ pclk2 / 2);
+
+ frame_period = gc2145_sensor_params_get_frame_period(&params);
+ if (framerate <= pclk2 / 2 / frame_period)
+ goto apply;
+
+ if (scaling_desired) {
+ // try using just the column scaler + row skip
+ params.col_scaler_only = 1;
+ params.row_skip = 1;
+ gc2145_sensor_params_fit_hb_to_power_line_period(&params,
+ power_line_freq,
+ pclk2 / 2);
+
+ frame_period = gc2145_sensor_params_get_frame_period(&params);
+ if (framerate <= pclk2 / 2 / frame_period)
+ goto apply;
+
+
+ /*
+ // try disabling the scaler and just use skipping
+ params.enable_scaler = 0;
+ pclk2 /= 2;
+ params.col_scaler_only = 0;
+ params.col_skip = 1;
+ gc2145_sensor_params_fit_hb_to_power_line_period(&params, power_line_freq, pclk2 / 2);
+
+ frame_period = gc2145_sensor_params_get_frame_period(&params);
+
+ if (framerate <= pclk2 / 2 / frame_period)
+ goto apply;
+ */
+ }
+
+apply:
+ // adjust vb to fit the target framerate
+ gc2145_sensor_params_fit_vb_to_frame_period(&params,
+ pclk2 / 2 / framerate);
+
+ gc2145_sensor_params_apply(sensor, &params);
+
+ ret = gc2145_set_2pclk(sensor, &pclk2, true);
+ if (ret < 0)
+ return ret;
+
+ pad = (width > 256 && height > 256) ? 32 : 16;
+
+ ret = gc2145_setup_awb(sensor, pad, pad, width - pad * 2, height - pad * 2);
+ if (ret)
+ return ret;
+
+ ret = gc2145_setup_aec(sensor,
+ pad, pad, width - pad * 2, height - pad * 2,
+ 2 * pad, 2 * pad, width - pad * 4, height - pad * 4);
+ if (ret)
+ return ret;
+
+ gc2145_tx_start(sensor);
+
+ // anti-flicker step
+ //gc2145_tx_write16(sensor, 0x125, 360); //XXX: get this from the calculator (hb related)
+
+ //XXX: calculate auto exposure settings, there are 4 slots that the HW
+ //uses and exposure settings are set in row_time units
+
+ rt = gc2145_sensor_params_get_row_period(&params);
+ ft = gc2145_sensor_params_get_frame_period(&params);
+ ft_rt = ft / rt / 4;
+
+ for (i = 0; i < 7; i++) {
+ // exposure settings for exposure levels
+ gc2145_tx_write16(sensor, 0x127 + 2 * i, ft_rt * (i + 1));
+ // max dg gains
+ gc2145_tx_write8(sensor, 0x135 + i, 0x50);
+ }
+
+ // max analog gain
+ gc2145_tx_write8(sensor, 0x11f, 0x50);
+ // max digital gain
+ gc2145_tx_write8(sensor, 0x120, 0xe0);
+
+ gc2145_tx_write8(sensor, GC2145_P0_ISP_OUT_FORMAT, pix_fmt->fmt_setup);
+
+ // set gamma curve
+ gc2145_tx_update_bits(sensor, 0x80, BIT(6), BIT(6));
+
+ // disable denoising
+ gc2145_tx_update_bits(sensor, 0x80, BIT(2), 0);
+
+ // drive strength
+ gc2145_tx_write8(sensor, 0x24,
+ (pclk2 / (params.enable_scaler + 1)) > 40000000 ?
+ 0xff : 0x55);
+
+ return gc2145_tx_commit(sensor);
+}
+
+static int gc2145_set_stream(struct gc2145_dev *sensor, int enable)
+{
+ gc2145_tx_start(sensor);
+
+ gc2145_tx_write8(sensor, GC2145_REG_PAD_IO, enable ? 0x0f : 0);
+
+ //XXX: maybe disable cam module function blocks that are not used
+ //and downclock the PLL/disable it when not streaming?
+
+ return gc2145_tx_commit(sensor);
+}
+
+static int gc2145_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct gc2145_dev *sensor = to_gc2145_dev(sd);
+ int ret = 0;
+
+ mutex_lock(&sensor->lock);
+
+ if (sensor->streaming == !enable) {
+ if (enable && sensor->pending_mode_change) {
+ ret = gc2145_setup_mode(sensor);
+ if (ret)
+ goto out;
+ }
+
+ ret = gc2145_set_stream(sensor, enable);
+ if (ret)
+ goto out;
+
+ sensor->streaming = !!enable;
+ }
+
+out:
+ mutex_unlock(&sensor->lock);
+ return ret;
+}
+
+/* }}} */
+/* {{{ Pad ops */
+
+static int gc2145_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->pad != 0 || code->index >= ARRAY_SIZE(gc2145_formats))
+ return -EINVAL;
+
+ code->code = gc2145_formats[code->index].code;
+
+ return 0;
+}
+
+static int gc2145_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ if (fse->pad != 0 || fse->index > 0)
+ return -EINVAL;
+
+ fse->min_width = GC2145_SENSOR_WIDTH_MIN;
+ fse->max_width = GC2145_SENSOR_WIDTH_MAX;
+
+ fse->min_height = GC2145_SENSOR_HEIGHT_MIN;
+ fse->max_height = GC2145_SENSOR_HEIGHT_MAX;
+
+ return 0;
+}
+
+static int gc2145_enum_frame_interval(
+ struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_frame_interval_enum *fie)
+{
+ if (fie->pad != 0 || fie->index > 0)
+ return -EINVAL;
+
+ fie->interval.numerator = 1;
+ fie->interval.denominator = 30;
+
+ return 0;
+}
+
+static int gc2145_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *format)
+{
+ struct gc2145_dev *sensor = to_gc2145_dev(sd);
+ struct v4l2_mbus_framefmt *mf;
+
+ if (format->pad != 0)
+ return -EINVAL;
+
+ if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
+ mf = v4l2_subdev_get_try_format(sd, sd_state, format->pad);
+ format->format = *mf;
+ return 0;
+ }
+
+ mutex_lock(&sensor->lock);
+ format->format = sensor->fmt;
+ mutex_unlock(&sensor->lock);
+
+ return 0;
+}
+
+static int gc2145_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *format)
+{
+ struct gc2145_dev *sensor = to_gc2145_dev(sd);
+ struct v4l2_mbus_framefmt *mf = &format->format;
+ const struct gc2145_pixfmt *pixfmt;
+ int ret = 0;
+
+ if (format->pad != 0)
+ return -EINVAL;
+
+ /* check if we support requested mbus fmt */
+ pixfmt = gc2145_find_format(mf->code);
+ if (!pixfmt)
+ pixfmt = &gc2145_formats[0];
+
+ mf->code = pixfmt->code;
+ mf->colorspace = pixfmt->colorspace;
+ mf->xfer_func = V4L2_XFER_FUNC_DEFAULT;
+ mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ mf->quantization = V4L2_QUANTIZATION_DEFAULT;
+ mf->field = V4L2_FIELD_NONE;
+
+ mutex_lock(&sensor->lock);
+
+ mf->width = clamp(mf->width, GC2145_SENSOR_WIDTH_MIN,
+ GC2145_SENSOR_WIDTH_MAX);
+ mf->height = clamp(mf->height, GC2145_SENSOR_HEIGHT_MIN,
+ GC2145_SENSOR_HEIGHT_MAX);
+
+ if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
+ struct v4l2_mbus_framefmt *try_mf;
+
+ try_mf = v4l2_subdev_get_try_format(sd, sd_state, format->pad);
+ *try_mf = *mf;
+ goto out;
+ }
+
+ if (sensor->streaming) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ sensor->fmt = *mf;
+ sensor->pending_mode_change = true;
+out:
+ mutex_unlock(&sensor->lock);
+ return ret;
+}
+
+/* }}} */
+/* {{{ Core Ops */
+
+static int gc2145_configure(struct gc2145_dev *sensor)
+{
+ struct v4l2_mbus_config_parallel *bus = &sensor->ep.bus.parallel;
+ u8 sync_mode = 0;
+ u16 chip_id;
+ int ret;
+
+ ret = gc2145_read16(sensor, GC2145_REG_CHIP_ID, &chip_id);
+ if (ret)
+ return ret;
+
+ dev_info(&sensor->i2c_client->dev, "device id: 0x%04x\n",
+ (unsigned int)chip_id);
+
+ if (chip_id != GC2145_REG_CHIP_ID_VALUE) {
+ dev_err(&sensor->i2c_client->dev,
+ "unsupported device id: 0x%04x\n",
+ (unsigned int)chip_id);
+ return -EINVAL;
+ }
+
+ // setup parallel bus
+
+ if (bus->flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+ sync_mode |= 0x01;
+
+ if (bus->flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+ sync_mode |= 0x02;
+
+ if (bus->flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+ sync_mode |= 0x04;
+
+ gc2145_tx_start(sensor);
+
+ // soft reset
+ gc2145_tx_write8(sensor, GC2145_REG_RESET, 0xf0);
+
+ // enable analog/digital parts
+ gc2145_tx_write8(sensor, GC2145_REG_ANALOG_PWC, 0x06);
+
+ // safe initial PLL setting
+ gc2145_tx_write8(sensor, GC2145_REG_PLL_MODE1, 0x1d);
+ gc2145_tx_write8(sensor, GC2145_REG_PLL_MODE2, 0x84);
+ gc2145_tx_write8(sensor, GC2145_REG_CLK_DIV_MODE, 0x00);
+
+ gc2145_tx_write8(sensor, GC2145_REG_CM_MODE, 0xfe);
+
+ // disable pads
+ gc2145_tx_write8(sensor, GC2145_REG_PAD_IO, 0);
+
+ gc2145_tx_write8(sensor, 0x19, 0x0c); // set AD pipe number
+ gc2145_tx_write8(sensor, 0x20, 0x01); // AD clk mode
+
+ // enable defect correction, etc.
+ gc2145_tx_write8(sensor, 0x80, 0x0b);
+
+ gc2145_tx_write8(sensor, GC2145_P0_SYNC_MODE, sync_mode);
+
+ ret = gc2145_tx_commit(sensor);
+ if (ret)
+ return ret;
+
+ // load default register values from the firmware file
+ ret = gc2145_load_firmware(sensor, GC2145_FIRMWARE_PARAMETERS);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int gc2145_set_power(struct gc2145_dev *sensor, bool on)
+{
+ int ret = 0;
+
+ if (on) {
+ ret = regulator_bulk_enable(GC2145_NUM_SUPPLIES,
+ sensor->supplies);
+ if (ret)
+ return ret;
+
+ ret = clk_set_rate(sensor->xclk, 24000000);
+ if (ret)
+ goto xclk_off;
+
+ ret = clk_prepare_enable(sensor->xclk);
+ if (ret)
+ goto power_off;
+
+ usleep_range(10000, 12000);
+ gpiod_direction_output(sensor->reset_gpio, 1);
+ usleep_range(10000, 12000);
+ gpiod_direction_output(sensor->enable_gpio, 1);
+ usleep_range(10000, 12000);
+ gpiod_direction_output(sensor->reset_gpio, 0);
+ usleep_range(40000, 50000);
+
+ ret = gc2145_configure(sensor);
+ if (ret)
+ goto xclk_off;
+
+ ret = gc2145_setup_mode(sensor);
+ if (ret)
+ goto xclk_off;
+
+ return 0;
+ }
+
+xclk_off:
+ clk_disable_unprepare(sensor->xclk);
+power_off:
+ gpiod_direction_input(sensor->reset_gpio);
+ gpiod_direction_input(sensor->enable_gpio);
+ regulator_bulk_disable(GC2145_NUM_SUPPLIES, sensor->supplies);
+ msleep(100);
+ return ret;
+}
+
+static int gc2145_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct gc2145_dev *sensor = to_gc2145_dev(sd);
+ bool power_up, power_down;
+ int ret = 0;
+
+ mutex_lock(&sensor->lock);
+
+ power_up = on && !sensor->powered;
+ power_down = !on && sensor->powered;
+
+ if (power_up || power_down) {
+ ret = gc2145_set_power(sensor, power_up);
+ if (!ret)
+ sensor->powered = on;
+ }
+
+ mutex_unlock(&sensor->lock);
+
+ if (!ret && power_up) {
+ /* restore controls */
+ ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
+ if (ret)
+ gc2145_s_power(sd, 0);
+ }
+
+ return ret;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int gc2145_g_register(struct v4l2_subdev *sd,
+ struct v4l2_dbg_register *reg)
+{
+ struct gc2145_dev *sensor = to_gc2145_dev(sd);
+ int ret;
+ u8 val = 0;
+
+ if (reg->reg > 0xffff)
+ return -EINVAL;
+
+ reg->size = 1;
+
+ mutex_lock(&sensor->lock);
+ ret = gc2145_read(sensor, reg->reg, &val);
+ mutex_unlock(&sensor->lock);
+ if (ret)
+ return -EIO;
+
+ reg->val = val;
+ return 0;
+}
+
+static int gc2145_s_register(struct v4l2_subdev *sd,
+ const struct v4l2_dbg_register *reg)
+{
+ struct gc2145_dev *sensor = to_gc2145_dev(sd);
+ int ret;
+
+ if (reg->reg > 0xffff || reg->val > 0xff)
+ return -EINVAL;
+
+ mutex_lock(&sensor->lock);
+ ret = gc2145_write(sensor, reg->reg, reg->val);
+ mutex_unlock(&sensor->lock);
+
+ return ret;
+}
+#endif
+
+/* }}} */
+
+static const struct v4l2_subdev_core_ops gc2145_core_ops = {
+ .s_power = gc2145_s_power,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .g_register = gc2145_g_register,
+ .s_register = gc2145_s_register,
+#endif
+};
+
+static const struct v4l2_subdev_pad_ops gc2145_pad_ops = {
+ .enum_mbus_code = gc2145_enum_mbus_code,
+ .enum_frame_size = gc2145_enum_frame_size,
+ .enum_frame_interval = gc2145_enum_frame_interval,
+ .get_fmt = gc2145_get_fmt,
+ .set_fmt = gc2145_set_fmt,
+};
+
+static const struct v4l2_subdev_video_ops gc2145_video_ops = {
+ .g_frame_interval = gc2145_g_frame_interval,
+ .s_frame_interval = gc2145_s_frame_interval,
+ .s_stream = gc2145_s_stream,
+};
+
+static const struct v4l2_subdev_ops gc2145_subdev_ops = {
+ .core = &gc2145_core_ops,
+ .pad = &gc2145_pad_ops,
+ .video = &gc2145_video_ops,
+};
+
+static int gc2145_get_regulators(struct gc2145_dev *sensor)
+{
+ int i;
+
+ for (i = 0; i < GC2145_NUM_SUPPLIES; i++)
+ sensor->supplies[i].supply = gc2145_supply_name[i];
+
+ return devm_regulator_bulk_get(&sensor->i2c_client->dev,
+ GC2145_NUM_SUPPLIES,
+ sensor->supplies);
+}
+
+static int gc2145_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct fwnode_handle *endpoint;
+ struct gc2145_dev *sensor;
+ int ret;
+
+ sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
+ if (!sensor)
+ return -ENOMEM;
+
+ sensor->i2c_client = client;
+
+ sensor->fmt.code = gc2145_formats[0].code;
+ sensor->fmt.width = 1600;
+ sensor->fmt.height = 1200;
+ sensor->fmt.field = V4L2_FIELD_NONE;
+ sensor->frame_interval.numerator = 1;
+ sensor->frame_interval.denominator = 10;
+ sensor->pending_mode_change = true;
+ sensor->current_bank = 0xff;
+
+ endpoint = fwnode_graph_get_next_endpoint(
+ of_fwnode_handle(client->dev.of_node), NULL);
+ if (!endpoint) {
+ dev_err(dev, "endpoint node not found\n");
+ return -EINVAL;
+ }
+
+ ret = v4l2_fwnode_endpoint_parse(endpoint, &sensor->ep);
+ fwnode_handle_put(endpoint);
+ if (ret) {
+ dev_err(dev, "could not parse endpoint\n");
+ return ret;
+ }
+
+ if (sensor->ep.bus_type != V4L2_MBUS_PARALLEL) {
+ dev_err(dev, "unsupported bus type %d\n", sensor->ep.bus_type);
+ return -EINVAL;
+ }
+
+ sensor->xclk = devm_clk_get(dev, "xclk");
+ if (IS_ERR(sensor->xclk)) {
+ dev_err(dev, "failed to get xclk\n");
+ return PTR_ERR(sensor->xclk);
+ }
+
+ sensor->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_IN);
+ if (IS_ERR(sensor->enable_gpio)) {
+ dev_err(dev, "failed to get enable gpio\n");
+ return PTR_ERR(sensor->enable_gpio);
+ }
+
+ sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_IN);
+ if (IS_ERR(sensor->reset_gpio)) {
+ dev_err(dev, "failed to get reset gpio\n");
+ return PTR_ERR(sensor->reset_gpio);
+ }
+
+ if (!sensor->enable_gpio || !sensor->reset_gpio) {
+ dev_err(dev, "enable and reset pins must be configured\n");
+ return ret;
+ }
+
+ v4l2_i2c_subdev_init(&sensor->sd, client, &gc2145_subdev_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 = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
+ if (ret)
+ return ret;
+
+ mutex_init(&sensor->lock);
+
+ ret = gc2145_get_regulators(sensor);
+ if (ret)
+ goto entity_cleanup;
+
+ ret = gc2145_init_controls(sensor);
+ if (ret)
+ goto entity_cleanup;
+
+ ret = v4l2_async_register_subdev(&sensor->sd);
+ if (ret)
+ goto free_ctrls;
+
+ return 0;
+
+free_ctrls:
+ v4l2_ctrl_handler_free(&sensor->ctrls.handler);
+entity_cleanup:
+ mutex_destroy(&sensor->lock);
+ media_entity_cleanup(&sensor->sd.entity);
+ return ret;
+}
+
+static void gc2145_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct gc2145_dev *sensor = to_gc2145_dev(sd);
+
+ v4l2_async_unregister_subdev(&sensor->sd);
+ mutex_destroy(&sensor->lock);
+ media_entity_cleanup(&sensor->sd.entity);
+ v4l2_ctrl_handler_free(&sensor->ctrls.handler);
+}
+
+static const struct i2c_device_id gc2145_id[] = {
+ {"gc2145", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, gc2145_id);
+
+static const struct of_device_id gc2145_dt_ids[] = {
+ { .compatible = "galaxycore,gc2145" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, gc2145_dt_ids);
+
+static struct i2c_driver gc2145_i2c_driver = {
+ .driver = {
+ .name = "gc2145",
+ .of_match_table = gc2145_dt_ids,
+ },
+ .id_table = gc2145_id,
+ .probe = gc2145_probe,
+ .remove = gc2145_remove,
+};
+
+module_i2c_driver(gc2145_i2c_driver);
+
+MODULE_AUTHOR("Ondrej Jirman <megi@xff.cz>");
+MODULE_DESCRIPTION("GC2145 Camera Subdev Driver");
+MODULE_LICENSE("GPL");
--
2.35.3
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