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-rw-r--r--drivers/media/i2c/hi556.c1200
1 files changed, 1200 insertions, 0 deletions
diff --git a/drivers/media/i2c/hi556.c b/drivers/media/i2c/hi556.c
new file mode 100644
index 000000000000..c66cd1446c0f
--- /dev/null
+++ b/drivers/media/i2c/hi556.c
@@ -0,0 +1,1200 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2019 Intel Corporation.
+
+#include <asm/unaligned.h>
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fwnode.h>
+
+#define HI556_REG_VALUE_08BIT 1
+#define HI556_REG_VALUE_16BIT 2
+#define HI556_REG_VALUE_24BIT 3
+
+#define HI556_LINK_FREQ_437MHZ 437000000ULL
+#define HI556_MCLK 19200000
+#define HI556_DATA_LANES 2
+#define HI556_RGB_DEPTH 10
+
+#define HI556_REG_CHIP_ID 0x0f16
+#define HI556_CHIP_ID 0x0556
+
+#define HI556_REG_MODE_SELECT 0x0a00
+#define HI556_MODE_STANDBY 0x0000
+#define HI556_MODE_STREAMING 0x0100
+
+/* vertical-timings from sensor */
+#define HI556_REG_FLL 0x0006
+#define HI556_FLL_30FPS 0x0814
+#define HI556_FLL_30FPS_MIN 0x0814
+#define HI556_FLL_MAX 0x7fff
+
+/* horizontal-timings from sensor */
+#define HI556_REG_LLP 0x0008
+
+/* Exposure controls from sensor */
+#define HI556_REG_EXPOSURE 0x0074
+#define HI556_EXPOSURE_MIN 6
+#define HI556_EXPOSURE_MAX_MARGIN 2
+#define HI556_EXPOSURE_STEP 1
+
+/* Analog gain controls from sensor */
+#define HI556_REG_ANALOG_GAIN 0x0077
+#define HI556_ANAL_GAIN_MIN 0
+#define HI556_ANAL_GAIN_MAX 240
+#define HI556_ANAL_GAIN_STEP 1
+
+/* Digital gain controls from sensor */
+#define HI556_REG_MWB_GR_GAIN 0x0078
+#define HI556_REG_MWB_GB_GAIN 0x007a
+#define HI556_REG_MWB_R_GAIN 0x007c
+#define HI556_REG_MWB_B_GAIN 0x007e
+#define HI556_DGTL_GAIN_MIN 0
+#define HI556_DGTL_GAIN_MAX 2048
+#define HI556_DGTL_GAIN_STEP 1
+#define HI556_DGTL_GAIN_DEFAULT 256
+
+/* Test Pattern Control */
+#define HI556_REG_ISP 0X0a05
+#define HI556_REG_ISP_TPG_EN 0x01
+#define HI556_REG_TEST_PATTERN 0x0201
+
+enum {
+ HI556_LINK_FREQ_437MHZ_INDEX,
+};
+
+struct hi556_reg {
+ u16 address;
+ u16 val;
+};
+
+struct hi556_reg_list {
+ u32 num_of_regs;
+ const struct hi556_reg *regs;
+};
+
+struct hi556_link_freq_config {
+ const struct hi556_reg_list reg_list;
+};
+
+struct hi556_mode {
+ /* Frame width in pixels */
+ u32 width;
+
+ /* Frame height in pixels */
+ u32 height;
+
+ /* Horizontal timining size */
+ u32 llp;
+
+ /* Default vertical timining size */
+ u32 fll_def;
+
+ /* Min vertical timining size */
+ u32 fll_min;
+
+ /* Link frequency needed for this resolution */
+ u32 link_freq_index;
+
+ /* Sensor register settings for this resolution */
+ const struct hi556_reg_list reg_list;
+};
+
+#define to_hi556(_sd) container_of(_sd, struct hi556, sd)
+
+//SENSOR_INITIALIZATION
+static const struct hi556_reg mipi_data_rate_874mbps[] = {
+ {0x0e00, 0x0102},
+ {0x0e02, 0x0102},
+ {0x0e0c, 0x0100},
+ {0x2000, 0x7400},
+ {0x2002, 0x001c},
+ {0x2004, 0x0242},
+ {0x2006, 0x0942},
+ {0x2008, 0x7007},
+ {0x200a, 0x0fd9},
+ {0x200c, 0x0259},
+ {0x200e, 0x7008},
+ {0x2010, 0x160e},
+ {0x2012, 0x0047},
+ {0x2014, 0x2118},
+ {0x2016, 0x0041},
+ {0x2018, 0x00d8},
+ {0x201a, 0x0145},
+ {0x201c, 0x0006},
+ {0x201e, 0x0181},
+ {0x2020, 0x13cc},
+ {0x2022, 0x2057},
+ {0x2024, 0x7001},
+ {0x2026, 0x0fca},
+ {0x2028, 0x00cb},
+ {0x202a, 0x009f},
+ {0x202c, 0x7002},
+ {0x202e, 0x13cc},
+ {0x2030, 0x019b},
+ {0x2032, 0x014d},
+ {0x2034, 0x2987},
+ {0x2036, 0x2766},
+ {0x2038, 0x0020},
+ {0x203a, 0x2060},
+ {0x203c, 0x0e5d},
+ {0x203e, 0x181d},
+ {0x2040, 0x2066},
+ {0x2042, 0x20c4},
+ {0x2044, 0x5000},
+ {0x2046, 0x0005},
+ {0x2048, 0x0000},
+ {0x204a, 0x01db},
+ {0x204c, 0x025a},
+ {0x204e, 0x00c0},
+ {0x2050, 0x0005},
+ {0x2052, 0x0006},
+ {0x2054, 0x0ad9},
+ {0x2056, 0x0259},
+ {0x2058, 0x0618},
+ {0x205a, 0x0258},
+ {0x205c, 0x2266},
+ {0x205e, 0x20c8},
+ {0x2060, 0x2060},
+ {0x2062, 0x707b},
+ {0x2064, 0x0fdd},
+ {0x2066, 0x81b8},
+ {0x2068, 0x5040},
+ {0x206a, 0x0020},
+ {0x206c, 0x5060},
+ {0x206e, 0x3143},
+ {0x2070, 0x5081},
+ {0x2072, 0x025c},
+ {0x2074, 0x7800},
+ {0x2076, 0x7400},
+ {0x2078, 0x001c},
+ {0x207a, 0x0242},
+ {0x207c, 0x0942},
+ {0x207e, 0x0bd9},
+ {0x2080, 0x0259},
+ {0x2082, 0x7008},
+ {0x2084, 0x160e},
+ {0x2086, 0x0047},
+ {0x2088, 0x2118},
+ {0x208a, 0x0041},
+ {0x208c, 0x00d8},
+ {0x208e, 0x0145},
+ {0x2090, 0x0006},
+ {0x2092, 0x0181},
+ {0x2094, 0x13cc},
+ {0x2096, 0x2057},
+ {0x2098, 0x7001},
+ {0x209a, 0x0fca},
+ {0x209c, 0x00cb},
+ {0x209e, 0x009f},
+ {0x20a0, 0x7002},
+ {0x20a2, 0x13cc},
+ {0x20a4, 0x019b},
+ {0x20a6, 0x014d},
+ {0x20a8, 0x2987},
+ {0x20aa, 0x2766},
+ {0x20ac, 0x0020},
+ {0x20ae, 0x2060},
+ {0x20b0, 0x0e5d},
+ {0x20b2, 0x181d},
+ {0x20b4, 0x2066},
+ {0x20b6, 0x20c4},
+ {0x20b8, 0x50a0},
+ {0x20ba, 0x0005},
+ {0x20bc, 0x0000},
+ {0x20be, 0x01db},
+ {0x20c0, 0x025a},
+ {0x20c2, 0x00c0},
+ {0x20c4, 0x0005},
+ {0x20c6, 0x0006},
+ {0x20c8, 0x0ad9},
+ {0x20ca, 0x0259},
+ {0x20cc, 0x0618},
+ {0x20ce, 0x0258},
+ {0x20d0, 0x2266},
+ {0x20d2, 0x20c8},
+ {0x20d4, 0x2060},
+ {0x20d6, 0x707b},
+ {0x20d8, 0x0fdd},
+ {0x20da, 0x86b8},
+ {0x20dc, 0x50e0},
+ {0x20de, 0x0020},
+ {0x20e0, 0x5100},
+ {0x20e2, 0x3143},
+ {0x20e4, 0x5121},
+ {0x20e6, 0x7800},
+ {0x20e8, 0x3140},
+ {0x20ea, 0x01c4},
+ {0x20ec, 0x01c1},
+ {0x20ee, 0x01c0},
+ {0x20f0, 0x01c4},
+ {0x20f2, 0x2700},
+ {0x20f4, 0x3d40},
+ {0x20f6, 0x7800},
+ {0x20f8, 0xffff},
+ {0x27fe, 0xe000},
+ {0x3000, 0x60f8},
+ {0x3002, 0x187f},
+ {0x3004, 0x7060},
+ {0x3006, 0x0114},
+ {0x3008, 0x60b0},
+ {0x300a, 0x1473},
+ {0x300c, 0x0013},
+ {0x300e, 0x140f},
+ {0x3010, 0x0040},
+ {0x3012, 0x100f},
+ {0x3014, 0x60f8},
+ {0x3016, 0x187f},
+ {0x3018, 0x7060},
+ {0x301a, 0x0114},
+ {0x301c, 0x60b0},
+ {0x301e, 0x1473},
+ {0x3020, 0x0013},
+ {0x3022, 0x140f},
+ {0x3024, 0x0040},
+ {0x3026, 0x000f},
+
+ {0x0b00, 0x0000},
+ {0x0b02, 0x0045},
+ {0x0b04, 0xb405},
+ {0x0b06, 0xc403},
+ {0x0b08, 0x0081},
+ {0x0b0a, 0x8252},
+ {0x0b0c, 0xf814},
+ {0x0b0e, 0xc618},
+ {0x0b10, 0xa828},
+ {0x0b12, 0x004c},
+ {0x0b14, 0x4068},
+ {0x0b16, 0x0000},
+ {0x0f30, 0x5b15},
+ {0x0f32, 0x7067},
+ {0x0954, 0x0009},
+ {0x0956, 0x0000},
+ {0x0958, 0xbb80},
+ {0x095a, 0x5140},
+ {0x0c00, 0x1110},
+ {0x0c02, 0x0011},
+ {0x0c04, 0x0000},
+ {0x0c06, 0x0200},
+ {0x0c10, 0x0040},
+ {0x0c12, 0x0040},
+ {0x0c14, 0x0040},
+ {0x0c16, 0x0040},
+ {0x0a10, 0x4000},
+ {0x3068, 0xf800},
+ {0x306a, 0xf876},
+ {0x006c, 0x0000},
+ {0x005e, 0x0200},
+ {0x000e, 0x0100},
+ {0x0e0a, 0x0001},
+ {0x004a, 0x0100},
+ {0x004c, 0x0000},
+ {0x004e, 0x0100},
+ {0x000c, 0x0022},
+ {0x0008, 0x0b00},
+ {0x005a, 0x0202},
+ {0x0012, 0x000e},
+ {0x0018, 0x0a33},
+ {0x0022, 0x0008},
+ {0x0028, 0x0017},
+ {0x0024, 0x0028},
+ {0x002a, 0x002d},
+ {0x0026, 0x0030},
+ {0x002c, 0x07c9},
+ {0x002e, 0x1111},
+ {0x0030, 0x1111},
+ {0x0032, 0x1111},
+ {0x0006, 0x07bc},
+ {0x0a22, 0x0000},
+ {0x0a12, 0x0a20},
+ {0x0a14, 0x0798},
+ {0x003e, 0x0000},
+ {0x0074, 0x080e},
+ {0x0070, 0x0407},
+ {0x0002, 0x0000},
+ {0x0a02, 0x0100},
+ {0x0a24, 0x0100},
+ {0x0046, 0x0000},
+ {0x0076, 0x0000},
+ {0x0060, 0x0000},
+ {0x0062, 0x0530},
+ {0x0064, 0x0500},
+ {0x0066, 0x0530},
+ {0x0068, 0x0500},
+ {0x0122, 0x0300},
+ {0x015a, 0xff08},
+ {0x0804, 0x0300},
+ {0x0806, 0x0100},
+ {0x005c, 0x0102},
+ {0x0a1a, 0x0800},
+};
+
+static const struct hi556_reg mode_2592x1944_regs[] = {
+ {0x0a00, 0x0000},
+ {0x0b0a, 0x8252},
+ {0x0f30, 0x5b15},
+ {0x0f32, 0x7067},
+ {0x004a, 0x0100},
+ {0x004c, 0x0000},
+ {0x004e, 0x0100},
+ {0x000c, 0x0022},
+ {0x0008, 0x0b00},
+ {0x005a, 0x0202},
+ {0x0012, 0x000e},
+ {0x0018, 0x0a33},
+ {0x0022, 0x0008},
+ {0x0028, 0x0017},
+ {0x0024, 0x0028},
+ {0x002a, 0x002d},
+ {0x0026, 0x0030},
+ {0x002c, 0x07c9},
+ {0x002e, 0x1111},
+ {0x0030, 0x1111},
+ {0x0032, 0x1111},
+ {0x0006, 0x0814},
+ {0x0a22, 0x0000},
+ {0x0a12, 0x0a20},
+ {0x0a14, 0x0798},
+ {0x003e, 0x0000},
+ {0x0074, 0x0812},
+ {0x0070, 0x0409},
+ {0x0804, 0x0300},
+ {0x0806, 0x0100},
+ {0x0a04, 0x014a},
+ {0x090c, 0x0fdc},
+ {0x090e, 0x002d},
+
+ {0x0902, 0x4319},
+ {0x0914, 0xc10a},
+ {0x0916, 0x071f},
+ {0x0918, 0x0408},
+ {0x091a, 0x0c0d},
+ {0x091c, 0x0f09},
+ {0x091e, 0x0a00},
+ {0x0958, 0xbb80},
+};
+
+static const struct hi556_reg mode_1296x972_regs[] = {
+ {0x0a00, 0x0000},
+ {0x0b0a, 0x8259},
+ {0x0f30, 0x5b15},
+ {0x0f32, 0x7167},
+ {0x004a, 0x0100},
+ {0x004c, 0x0000},
+ {0x004e, 0x0100},
+ {0x000c, 0x0122},
+ {0x0008, 0x0b00},
+ {0x005a, 0x0404},
+ {0x0012, 0x000c},
+ {0x0018, 0x0a33},
+ {0x0022, 0x0008},
+ {0x0028, 0x0017},
+ {0x0024, 0x0022},
+ {0x002a, 0x002b},
+ {0x0026, 0x0030},
+ {0x002c, 0x07c9},
+ {0x002e, 0x3311},
+ {0x0030, 0x3311},
+ {0x0032, 0x3311},
+ {0x0006, 0x0814},
+ {0x0a22, 0x0000},
+ {0x0a12, 0x0510},
+ {0x0a14, 0x03cc},
+ {0x003e, 0x0000},
+ {0x0074, 0x0812},
+ {0x0070, 0x0409},
+ {0x0804, 0x0308},
+ {0x0806, 0x0100},
+ {0x0a04, 0x016a},
+ {0x090e, 0x0010},
+ {0x090c, 0x09c0},
+
+ {0x0902, 0x4319},
+ {0x0914, 0xc106},
+ {0x0916, 0x040e},
+ {0x0918, 0x0304},
+ {0x091a, 0x0708},
+ {0x091c, 0x0e06},
+ {0x091e, 0x0300},
+ {0x0958, 0xbb80},
+};
+
+static const char * const hi556_test_pattern_menu[] = {
+ "Disabled",
+ "Solid Colour",
+ "100% Colour Bars",
+ "Fade To Grey Colour Bars",
+ "PN9",
+ "Gradient Horizontal",
+ "Gradient Vertical",
+ "Check Board",
+ "Slant Pattern",
+};
+
+static const s64 link_freq_menu_items[] = {
+ HI556_LINK_FREQ_437MHZ,
+};
+
+static const struct hi556_link_freq_config link_freq_configs[] = {
+ [HI556_LINK_FREQ_437MHZ_INDEX] = {
+ .reg_list = {
+ .num_of_regs = ARRAY_SIZE(mipi_data_rate_874mbps),
+ .regs = mipi_data_rate_874mbps,
+ }
+ }
+};
+
+static const struct hi556_mode supported_modes[] = {
+ {
+ .width = 2592,
+ .height = 1944,
+ .fll_def = HI556_FLL_30FPS,
+ .fll_min = HI556_FLL_30FPS_MIN,
+ .llp = 0x0b00,
+ .reg_list = {
+ .num_of_regs = ARRAY_SIZE(mode_2592x1944_regs),
+ .regs = mode_2592x1944_regs,
+ },
+ .link_freq_index = HI556_LINK_FREQ_437MHZ_INDEX,
+ },
+ {
+ .width = 1296,
+ .height = 972,
+ .fll_def = HI556_FLL_30FPS,
+ .fll_min = HI556_FLL_30FPS_MIN,
+ .llp = 0x0b00,
+ .reg_list = {
+ .num_of_regs = ARRAY_SIZE(mode_1296x972_regs),
+ .regs = mode_1296x972_regs,
+ },
+ .link_freq_index = HI556_LINK_FREQ_437MHZ_INDEX,
+ }
+};
+
+struct hi556 {
+ struct v4l2_subdev sd;
+ struct media_pad pad;
+ struct v4l2_ctrl_handler ctrl_handler;
+
+ /* V4L2 Controls */
+ struct v4l2_ctrl *link_freq;
+ struct v4l2_ctrl *pixel_rate;
+ struct v4l2_ctrl *vblank;
+ struct v4l2_ctrl *hblank;
+ struct v4l2_ctrl *exposure;
+
+ /* Current mode */
+ const struct hi556_mode *cur_mode;
+
+ /* To serialize asynchronus callbacks */
+ struct mutex mutex;
+
+ /* Streaming on/off */
+ bool streaming;
+};
+
+static u64 to_pixel_rate(u32 f_index)
+{
+ u64 pixel_rate = link_freq_menu_items[f_index] * 2 * HI556_DATA_LANES;
+
+ do_div(pixel_rate, HI556_RGB_DEPTH);
+
+ return pixel_rate;
+}
+
+static int hi556_read_reg(struct hi556 *hi556, u16 reg, u16 len, u32 *val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
+ struct i2c_msg msgs[2];
+ u8 addr_buf[2];
+ u8 data_buf[4] = {0};
+ int ret;
+
+ if (len > 4)
+ return -EINVAL;
+
+ put_unaligned_be16(reg, addr_buf);
+ msgs[0].addr = client->addr;
+ msgs[0].flags = 0;
+ msgs[0].len = sizeof(addr_buf);
+ msgs[0].buf = addr_buf;
+ msgs[1].addr = client->addr;
+ msgs[1].flags = I2C_M_RD;
+ msgs[1].len = len;
+ msgs[1].buf = &data_buf[4 - len];
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret != ARRAY_SIZE(msgs))
+ return -EIO;
+
+ *val = get_unaligned_be32(data_buf);
+
+ return 0;
+}
+
+static int hi556_write_reg(struct hi556 *hi556, u16 reg, u16 len, u32 val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
+ u8 buf[6];
+
+ if (len > 4)
+ return -EINVAL;
+
+ put_unaligned_be16(reg, buf);
+ put_unaligned_be32(val << 8 * (4 - len), buf + 2);
+ if (i2c_master_send(client, buf, len + 2) != len + 2)
+ return -EIO;
+
+ return 0;
+}
+
+static int hi556_write_reg_list(struct hi556 *hi556,
+ const struct hi556_reg_list *r_list)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < r_list->num_of_regs; i++) {
+ ret = hi556_write_reg(hi556, r_list->regs[i].address,
+ HI556_REG_VALUE_16BIT,
+ r_list->regs[i].val);
+ if (ret) {
+ dev_err_ratelimited(&client->dev,
+ "failed to write reg 0x%4.4x. error = %d",
+ r_list->regs[i].address, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int hi556_update_digital_gain(struct hi556 *hi556, u32 d_gain)
+{
+ int ret;
+
+ ret = hi556_write_reg(hi556, HI556_REG_MWB_GR_GAIN,
+ HI556_REG_VALUE_16BIT, d_gain);
+ if (ret)
+ return ret;
+
+ ret = hi556_write_reg(hi556, HI556_REG_MWB_GB_GAIN,
+ HI556_REG_VALUE_16BIT, d_gain);
+ if (ret)
+ return ret;
+
+ ret = hi556_write_reg(hi556, HI556_REG_MWB_R_GAIN,
+ HI556_REG_VALUE_16BIT, d_gain);
+ if (ret)
+ return ret;
+
+ return hi556_write_reg(hi556, HI556_REG_MWB_B_GAIN,
+ HI556_REG_VALUE_16BIT, d_gain);
+}
+
+static int hi556_test_pattern(struct hi556 *hi556, u32 pattern)
+{
+ int ret;
+ u32 val;
+
+ if (pattern) {
+ ret = hi556_read_reg(hi556, HI556_REG_ISP,
+ HI556_REG_VALUE_08BIT, &val);
+ if (ret)
+ return ret;
+
+ ret = hi556_write_reg(hi556, HI556_REG_ISP,
+ HI556_REG_VALUE_08BIT,
+ val | HI556_REG_ISP_TPG_EN);
+ if (ret)
+ return ret;
+ }
+
+ return hi556_write_reg(hi556, HI556_REG_TEST_PATTERN,
+ HI556_REG_VALUE_08BIT, pattern);
+}
+
+static int hi556_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct hi556 *hi556 = container_of(ctrl->handler,
+ struct hi556, ctrl_handler);
+ struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
+ s64 exposure_max;
+ int ret = 0;
+
+ /* Propagate change of current control to all related controls */
+ if (ctrl->id == V4L2_CID_VBLANK) {
+ /* Update max exposure while meeting expected vblanking */
+ exposure_max = hi556->cur_mode->height + ctrl->val -
+ HI556_EXPOSURE_MAX_MARGIN;
+ __v4l2_ctrl_modify_range(hi556->exposure,
+ hi556->exposure->minimum,
+ exposure_max, hi556->exposure->step,
+ exposure_max);
+ }
+
+ /* V4L2 controls values will be applied only when power is already up */
+ if (!pm_runtime_get_if_in_use(&client->dev))
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_ANALOGUE_GAIN:
+ ret = hi556_write_reg(hi556, HI556_REG_ANALOG_GAIN,
+ HI556_REG_VALUE_16BIT, ctrl->val);
+ break;
+
+ case V4L2_CID_DIGITAL_GAIN:
+ ret = hi556_update_digital_gain(hi556, ctrl->val);
+ break;
+
+ case V4L2_CID_EXPOSURE:
+ ret = hi556_write_reg(hi556, HI556_REG_EXPOSURE,
+ HI556_REG_VALUE_16BIT, ctrl->val);
+ break;
+
+ case V4L2_CID_VBLANK:
+ /* Update FLL that meets expected vertical blanking */
+ ret = hi556_write_reg(hi556, HI556_REG_FLL,
+ HI556_REG_VALUE_16BIT,
+ hi556->cur_mode->height + ctrl->val);
+ break;
+
+ case V4L2_CID_TEST_PATTERN:
+ ret = hi556_test_pattern(hi556, ctrl->val);
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ pm_runtime_put(&client->dev);
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops hi556_ctrl_ops = {
+ .s_ctrl = hi556_set_ctrl,
+};
+
+static int hi556_init_controls(struct hi556 *hi556)
+{
+ struct v4l2_ctrl_handler *ctrl_hdlr;
+ s64 exposure_max, h_blank;
+ int ret;
+
+ ctrl_hdlr = &hi556->ctrl_handler;
+ ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
+ if (ret)
+ return ret;
+
+ ctrl_hdlr->lock = &hi556->mutex;
+ hi556->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &hi556_ctrl_ops,
+ V4L2_CID_LINK_FREQ,
+ ARRAY_SIZE(link_freq_menu_items) - 1,
+ 0, link_freq_menu_items);
+ if (hi556->link_freq)
+ hi556->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ hi556->pixel_rate = v4l2_ctrl_new_std
+ (ctrl_hdlr, &hi556_ctrl_ops,
+ V4L2_CID_PIXEL_RATE, 0,
+ to_pixel_rate(HI556_LINK_FREQ_437MHZ_INDEX),
+ 1,
+ to_pixel_rate(HI556_LINK_FREQ_437MHZ_INDEX));
+ hi556->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops,
+ V4L2_CID_VBLANK,
+ hi556->cur_mode->fll_min -
+ hi556->cur_mode->height,
+ HI556_FLL_MAX -
+ hi556->cur_mode->height, 1,
+ hi556->cur_mode->fll_def -
+ hi556->cur_mode->height);
+
+ h_blank = hi556->cur_mode->llp - hi556->cur_mode->width;
+
+ hi556->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops,
+ V4L2_CID_HBLANK, h_blank, h_blank, 1,
+ h_blank);
+ if (hi556->hblank)
+ hi556->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
+ HI556_ANAL_GAIN_MIN, HI556_ANAL_GAIN_MAX,
+ HI556_ANAL_GAIN_STEP, HI556_ANAL_GAIN_MIN);
+ v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
+ HI556_DGTL_GAIN_MIN, HI556_DGTL_GAIN_MAX,
+ HI556_DGTL_GAIN_STEP, HI556_DGTL_GAIN_DEFAULT);
+ exposure_max = hi556->cur_mode->fll_def - HI556_EXPOSURE_MAX_MARGIN;
+ hi556->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops,
+ V4L2_CID_EXPOSURE,
+ HI556_EXPOSURE_MIN, exposure_max,
+ HI556_EXPOSURE_STEP,
+ exposure_max);
+ v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &hi556_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(hi556_test_pattern_menu) - 1,
+ 0, 0, hi556_test_pattern_menu);
+ if (ctrl_hdlr->error)
+ return ctrl_hdlr->error;
+
+ hi556->sd.ctrl_handler = ctrl_hdlr;
+
+ return 0;
+}
+
+static void hi556_assign_pad_format(const struct hi556_mode *mode,
+ struct v4l2_mbus_framefmt *fmt)
+{
+ fmt->width = mode->width;
+ fmt->height = mode->height;
+ fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
+ fmt->field = V4L2_FIELD_NONE;
+}
+
+static int hi556_start_streaming(struct hi556 *hi556)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
+ const struct hi556_reg_list *reg_list;
+ int link_freq_index, ret;
+
+ link_freq_index = hi556->cur_mode->link_freq_index;
+ reg_list = &link_freq_configs[link_freq_index].reg_list;
+ ret = hi556_write_reg_list(hi556, reg_list);
+ if (ret) {
+ dev_err(&client->dev, "failed to set plls");
+ return ret;
+ }
+
+ reg_list = &hi556->cur_mode->reg_list;
+ ret = hi556_write_reg_list(hi556, reg_list);
+ if (ret) {
+ dev_err(&client->dev, "failed to set mode");
+ return ret;
+ }
+
+ ret = __v4l2_ctrl_handler_setup(hi556->sd.ctrl_handler);
+ if (ret)
+ return ret;
+
+ ret = hi556_write_reg(hi556, HI556_REG_MODE_SELECT,
+ HI556_REG_VALUE_16BIT, HI556_MODE_STREAMING);
+
+ if (ret) {
+ dev_err(&client->dev, "failed to set stream");
+ return ret;
+ }
+
+ return 0;
+}
+
+static void hi556_stop_streaming(struct hi556 *hi556)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
+
+ if (hi556_write_reg(hi556, HI556_REG_MODE_SELECT,
+ HI556_REG_VALUE_16BIT, HI556_MODE_STANDBY))
+ dev_err(&client->dev, "failed to set stream");
+}
+
+static int hi556_set_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct hi556 *hi556 = to_hi556(sd);
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ int ret = 0;
+
+ if (hi556->streaming == enable)
+ return 0;
+
+ mutex_lock(&hi556->mutex);
+ if (enable) {
+ ret = pm_runtime_get_sync(&client->dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(&client->dev);
+ mutex_unlock(&hi556->mutex);
+ return ret;
+ }
+
+ ret = hi556_start_streaming(hi556);
+ if (ret) {
+ enable = 0;
+ hi556_stop_streaming(hi556);
+ pm_runtime_put(&client->dev);
+ }
+ } else {
+ hi556_stop_streaming(hi556);
+ pm_runtime_put(&client->dev);
+ }
+
+ hi556->streaming = enable;
+ mutex_unlock(&hi556->mutex);
+
+ return ret;
+}
+
+static int __maybe_unused hi556_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct hi556 *hi556 = to_hi556(sd);
+
+ mutex_lock(&hi556->mutex);
+ if (hi556->streaming)
+ hi556_stop_streaming(hi556);
+
+ mutex_unlock(&hi556->mutex);
+
+ return 0;
+}
+
+static int __maybe_unused hi556_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct hi556 *hi556 = to_hi556(sd);
+ int ret;
+
+ mutex_lock(&hi556->mutex);
+ if (hi556->streaming) {
+ ret = hi556_start_streaming(hi556);
+ if (ret)
+ goto error;
+ }
+
+ mutex_unlock(&hi556->mutex);
+
+ return 0;
+
+error:
+ hi556_stop_streaming(hi556);
+ hi556->streaming = 0;
+ mutex_unlock(&hi556->mutex);
+ return ret;
+}
+
+static int hi556_set_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct hi556 *hi556 = to_hi556(sd);
+ const struct hi556_mode *mode;
+ s32 vblank_def, h_blank;
+
+ mode = v4l2_find_nearest_size(supported_modes,
+ ARRAY_SIZE(supported_modes), width,
+ height, fmt->format.width,
+ fmt->format.height);
+
+ mutex_lock(&hi556->mutex);
+ hi556_assign_pad_format(mode, &fmt->format);
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
+ } else {
+ hi556->cur_mode = mode;
+ __v4l2_ctrl_s_ctrl(hi556->link_freq, mode->link_freq_index);
+ __v4l2_ctrl_s_ctrl_int64(hi556->pixel_rate,
+ to_pixel_rate(mode->link_freq_index));
+
+ /* Update limits and set FPS to default */
+ vblank_def = mode->fll_def - mode->height;
+ __v4l2_ctrl_modify_range(hi556->vblank,
+ mode->fll_min - mode->height,
+ HI556_FLL_MAX - mode->height, 1,
+ vblank_def);
+ __v4l2_ctrl_s_ctrl(hi556->vblank, vblank_def);
+
+ h_blank = hi556->cur_mode->llp - hi556->cur_mode->width;
+
+ __v4l2_ctrl_modify_range(hi556->hblank, h_blank, h_blank, 1,
+ h_blank);
+ }
+
+ mutex_unlock(&hi556->mutex);
+
+ return 0;
+}
+
+static int hi556_get_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct hi556 *hi556 = to_hi556(sd);
+
+ mutex_lock(&hi556->mutex);
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+ fmt->format = *v4l2_subdev_get_try_format(&hi556->sd, cfg,
+ fmt->pad);
+ else
+ hi556_assign_pad_format(hi556->cur_mode, &fmt->format);
+
+ mutex_unlock(&hi556->mutex);
+
+ return 0;
+}
+
+static int hi556_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index > 0)
+ return -EINVAL;
+
+ code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
+
+ return 0;
+}
+
+static int hi556_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ if (fse->index >= ARRAY_SIZE(supported_modes))
+ return -EINVAL;
+
+ if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10)
+ return -EINVAL;
+
+ fse->min_width = supported_modes[fse->index].width;
+ fse->max_width = fse->min_width;
+ fse->min_height = supported_modes[fse->index].height;
+ fse->max_height = fse->min_height;
+
+ return 0;
+}
+
+static int hi556_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct hi556 *hi556 = to_hi556(sd);
+
+ mutex_lock(&hi556->mutex);
+ hi556_assign_pad_format(&supported_modes[0],
+ v4l2_subdev_get_try_format(sd, fh->pad, 0));
+ mutex_unlock(&hi556->mutex);
+
+ return 0;
+}
+
+static const struct v4l2_subdev_video_ops hi556_video_ops = {
+ .s_stream = hi556_set_stream,
+};
+
+static const struct v4l2_subdev_pad_ops hi556_pad_ops = {
+ .set_fmt = hi556_set_format,
+ .get_fmt = hi556_get_format,
+ .enum_mbus_code = hi556_enum_mbus_code,
+ .enum_frame_size = hi556_enum_frame_size,
+};
+
+static const struct v4l2_subdev_ops hi556_subdev_ops = {
+ .video = &hi556_video_ops,
+ .pad = &hi556_pad_ops,
+};
+
+static const struct media_entity_operations hi556_subdev_entity_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+static const struct v4l2_subdev_internal_ops hi556_internal_ops = {
+ .open = hi556_open,
+};
+
+static int hi556_identify_module(struct hi556 *hi556)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
+ int ret;
+ u32 val;
+
+ ret = hi556_read_reg(hi556, HI556_REG_CHIP_ID,
+ HI556_REG_VALUE_16BIT, &val);
+ if (ret)
+ return ret;
+
+ if (val != HI556_CHIP_ID) {
+ dev_err(&client->dev, "chip id mismatch: %x!=%x",
+ HI556_CHIP_ID, val);
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+static int hi556_check_hwcfg(struct device *dev)
+{
+ struct fwnode_handle *ep;
+ struct fwnode_handle *fwnode = dev_fwnode(dev);
+ struct v4l2_fwnode_endpoint bus_cfg = {
+ .bus_type = V4L2_MBUS_CSI2_DPHY
+ };
+ u32 mclk;
+ int ret = 0;
+ unsigned int i, j;
+
+ if (!fwnode)
+ return -ENXIO;
+
+ ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk);
+ if (ret) {
+ dev_err(dev, "can't get clock frequency");
+ return ret;
+ }
+
+ if (mclk != HI556_MCLK) {
+ dev_err(dev, "external clock %d is not supported", mclk);
+ return -EINVAL;
+ }
+
+ ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
+ if (!ep)
+ return -ENXIO;
+
+ ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
+ fwnode_handle_put(ep);
+ if (ret)
+ return ret;
+
+ if (bus_cfg.bus.mipi_csi2.num_data_lanes != 2) {
+ dev_err(dev, "number of CSI2 data lanes %d is not supported",
+ bus_cfg.bus.mipi_csi2.num_data_lanes);
+ ret = -EINVAL;
+ goto check_hwcfg_error;
+ }
+
+ if (!bus_cfg.nr_of_link_frequencies) {
+ dev_err(dev, "no link frequencies defined");
+ ret = -EINVAL;
+ goto check_hwcfg_error;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
+ for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
+ if (link_freq_menu_items[i] ==
+ bus_cfg.link_frequencies[j])
+ break;
+ }
+
+ if (j == bus_cfg.nr_of_link_frequencies) {
+ dev_err(dev, "no link frequency %lld supported",
+ link_freq_menu_items[i]);
+ ret = -EINVAL;
+ goto check_hwcfg_error;
+ }
+ }
+
+check_hwcfg_error:
+ v4l2_fwnode_endpoint_free(&bus_cfg);
+
+ return ret;
+}
+
+static int hi556_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct hi556 *hi556 = to_hi556(sd);
+
+ v4l2_async_unregister_subdev(sd);
+ media_entity_cleanup(&sd->entity);
+ v4l2_ctrl_handler_free(sd->ctrl_handler);
+ pm_runtime_disable(&client->dev);
+ mutex_destroy(&hi556->mutex);
+
+ return 0;
+}
+
+static int hi556_probe(struct i2c_client *client)
+{
+ struct hi556 *hi556;
+ int ret;
+
+ ret = hi556_check_hwcfg(&client->dev);
+ if (ret) {
+ dev_err(&client->dev, "failed to check HW configuration: %d",
+ ret);
+ return ret;
+ }
+
+ hi556 = devm_kzalloc(&client->dev, sizeof(*hi556), GFP_KERNEL);
+ if (!hi556)
+ return -ENOMEM;
+
+ v4l2_i2c_subdev_init(&hi556->sd, client, &hi556_subdev_ops);
+ ret = hi556_identify_module(hi556);
+ if (ret) {
+ dev_err(&client->dev, "failed to find sensor: %d", ret);
+ return ret;
+ }
+
+ mutex_init(&hi556->mutex);
+ hi556->cur_mode = &supported_modes[0];
+ ret = hi556_init_controls(hi556);
+ if (ret) {
+ dev_err(&client->dev, "failed to init controls: %d", ret);
+ goto probe_error_v4l2_ctrl_handler_free;
+ }
+
+ hi556->sd.internal_ops = &hi556_internal_ops;
+ hi556->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ hi556->sd.entity.ops = &hi556_subdev_entity_ops;
+ hi556->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+ hi556->pad.flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_pads_init(&hi556->sd.entity, 1, &hi556->pad);
+ if (ret) {
+ dev_err(&client->dev, "failed to init entity pads: %d", ret);
+ goto probe_error_v4l2_ctrl_handler_free;
+ }
+
+ ret = v4l2_async_register_subdev_sensor_common(&hi556->sd);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to register V4L2 subdev: %d",
+ ret);
+ goto probe_error_media_entity_cleanup;
+ }
+
+ pm_runtime_set_active(&client->dev);
+ pm_runtime_enable(&client->dev);
+ pm_runtime_idle(&client->dev);
+
+ return 0;
+
+probe_error_media_entity_cleanup:
+ media_entity_cleanup(&hi556->sd.entity);
+
+probe_error_v4l2_ctrl_handler_free:
+ v4l2_ctrl_handler_free(hi556->sd.ctrl_handler);
+ mutex_destroy(&hi556->mutex);
+
+ return ret;
+}
+
+static const struct dev_pm_ops hi556_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(hi556_suspend, hi556_resume)
+};
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id hi556_acpi_ids[] = {
+ {"INT3537"},
+ {}
+};
+
+MODULE_DEVICE_TABLE(acpi, hi556_acpi_ids);
+#endif
+
+static struct i2c_driver hi556_i2c_driver = {
+ .driver = {
+ .name = "hi556",
+ .pm = &hi556_pm_ops,
+ .acpi_match_table = ACPI_PTR(hi556_acpi_ids),
+ },
+ .probe_new = hi556_probe,
+ .remove = hi556_remove,
+};
+
+module_i2c_driver(hi556_i2c_driver);
+
+MODULE_AUTHOR("Shawn Tu <shawnx.tu@intel.com>");
+MODULE_DESCRIPTION("Hynix HI556 sensor driver");
+MODULE_LICENSE("GPL v2");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.