// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2018 Fuzhou Rockchip Electronics Co., Ltd.
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/pm_runtime.h>
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#include <linux/rk-camera-module.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include "imx258_eeprom_head.h"
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#define DEVICE_NAME "imx258_eeprom"
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static inline struct imx258_eeprom_device
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*sd_to_imx258_eeprom(struct v4l2_subdev *subdev)
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{
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return container_of(subdev, struct imx258_eeprom_device, sd);
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}
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/* Read registers up to 4 at a time */
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static int imx258_read_reg_otp(struct i2c_client *client, u16 reg,
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unsigned int len, u32 *val)
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{
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struct i2c_msg msgs[2];
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u8 *data_be_p;
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__be32 data_be = 0;
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__be16 reg_addr_be = cpu_to_be16(reg);
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int ret;
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if (len > 4 || !len)
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return -EINVAL;
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data_be_p = (u8 *)&data_be;
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/* Write register address */
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msgs[0].addr = client->addr;
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msgs[0].flags = 0;
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msgs[0].len = 2;
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msgs[0].buf = (u8 *)®_addr_be;
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/* Read data from register */
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msgs[1].addr = client->addr;
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msgs[1].flags = I2C_M_RD;
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msgs[1].len = len;
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msgs[1].buf = &data_be_p[4 - len];
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ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
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if (ret != ARRAY_SIZE(msgs))
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return -EIO;
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*val = be32_to_cpu(data_be);
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return 0;
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}
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static u8 get_vendor_flag(struct i2c_client *client)
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{
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u8 vendor_flag = 0;
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if (client->addr == SLAVE_ADDRESS_GZ)
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vendor_flag |= 0x80;
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return vendor_flag;
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}
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static int imx258_otp_read_gz(struct imx258_eeprom_device *imx258_eeprom_dev)
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{
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struct i2c_client *client = imx258_eeprom_dev->client;
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int otp_flag, i;
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struct imx258_otp_info *otp_ptr;
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struct device *dev = &imx258_eeprom_dev->client->dev;
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int ret = 0;
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u32 r_value, gr_value, gb_value, b_value;
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u32 temp = 0;
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u32 checksum = 0;
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otp_ptr = kzalloc(sizeof(*otp_ptr), GFP_KERNEL);
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if (!otp_ptr)
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return -ENOMEM;
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otp_flag = 0;
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/* OTP base information*/
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ret = imx258_read_reg_otp(client, GZ_INFO_FLAG_REG,
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1, &otp_flag);
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if (otp_flag == 0x01) {
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otp_ptr->flag = 0x80; /* valid INFO in OTP */
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ret |= imx258_read_reg_otp(client, GZ_ID_REG,
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1, &otp_ptr->module_id);
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ret |= imx258_read_reg_otp(client, GZ_LENS_ID_REG,
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1, &otp_ptr->lens_id);
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ret |= imx258_read_reg_otp(client, GZ_PRODUCT_YEAR_REG,
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1, &otp_ptr->year);
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ret |= imx258_read_reg_otp(client, GZ_PRODUCT_MONTH_REG,
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1, &otp_ptr->month);
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ret |= imx258_read_reg_otp(client, GZ_PRODUCT_DAY_REG,
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1, &otp_ptr->day);
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dev_dbg(dev, "fac info: module(0x%x) lens(0x%x) time(%d_%d_%d)!\n",
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otp_ptr->module_id,
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otp_ptr->lens_id,
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otp_ptr->year,
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otp_ptr->month,
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otp_ptr->day);
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if (ret)
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goto err;
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}
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/* OTP WB calibration data */
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ret = imx258_read_reg_otp(client, GZ_AWB_FLAG_REG,
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1, &otp_flag);
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if (otp_flag == 0x01) {
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otp_ptr->flag |= 0x40; /* valid AWB in OTP */
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ret |= imx258_read_reg_otp(client, GZ_CUR_R_REG,
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1, &r_value);
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checksum += r_value;
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ret |= imx258_read_reg_otp(client, GZ_CUR_GR_REG,
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1, &gr_value);
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checksum += gr_value;
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ret |= imx258_read_reg_otp(client, GZ_CUR_GB_REG,
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1, &gb_value);
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checksum += gb_value;
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ret |= imx258_read_reg_otp(client, GZ_CUR_B_REG,
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1, &b_value);
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checksum += b_value;
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otp_ptr->rg_ratio =
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r_value * 1024 / ((gr_value + gb_value) / 2);
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otp_ptr->bg_ratio =
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b_value * 1024 / ((gr_value + gb_value) / 2);
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ret |= imx258_read_reg_otp(client, GZ_GOLDEN_R_REG,
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1, &r_value);
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checksum += r_value;
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ret |= imx258_read_reg_otp(client, GZ_GOLDEN_GR_REG,
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1, &gr_value);
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checksum += gr_value;
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ret |= imx258_read_reg_otp(client, GZ_GOLDEN_GB_REG,
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1, &gb_value);
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checksum += gb_value;
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ret |= imx258_read_reg_otp(client, GZ_GOLDEN_B_REG,
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1, &b_value);
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checksum += b_value;
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otp_ptr->rg_golden =
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r_value * 1024 / ((gr_value + gb_value) / 2);
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otp_ptr->bg_golden =
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b_value * 1024 / ((gr_value + gb_value) / 2);
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ret |= imx258_read_reg_otp(client, GZ_AWB_CHECKSUM_REG,
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1, &temp);
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if (ret != 0 || (checksum % 0xff) != temp) {
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dev_err(dev, "otp awb info: check sum (%d,%d),ret = %d !\n",
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checksum,
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temp,
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ret);
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goto err;
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}
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dev_dbg(dev, "awb cur:(rg 0x%x, bg 0x%x,)\n",
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otp_ptr->rg_ratio, otp_ptr->bg_ratio);
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dev_dbg(dev, "awb gol:(rg 0x%x, bg 0x%x)\n",
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otp_ptr->rg_golden, otp_ptr->bg_golden);
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}
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checksum = 0;
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/* OTP LSC calibration data */
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ret = imx258_read_reg_otp(client, GZ_LSC_FLAG_REG,
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1, &otp_flag);
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if (otp_flag == 0x01) {
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otp_ptr->flag |= 0x10; /* valid LSC in OTP */
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for (i = 0; i < 504; i++) {
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ret |= imx258_read_reg_otp(client,
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GZ_LSC_DATA_START_REG + i,
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1, &temp);
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otp_ptr->lenc[i] = temp;
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checksum += temp;
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dev_dbg(dev,
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"otp read lsc addr = 0x%04x, lenc[%d] = %d\n",
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GZ_LSC_DATA_START_REG + i, i, temp);
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}
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ret |= imx258_read_reg_otp(client, GZ_LSC_CHECKSUM_REG,
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1, &temp);
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if (ret != 0 || (checksum % 0xff) != temp) {
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dev_err(dev,
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"otp lsc info: check sum (%d,%d),ret = %d !\n",
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checksum, temp, ret);
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goto err;
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}
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}
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checksum = 0;
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/* OTP VCM calibration data */
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ret = imx258_read_reg_otp(client, GZ_VCM_FLAG_REG,
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1, &otp_flag);
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if (otp_flag == 0x01) {
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otp_ptr->flag |= 0x20; /* valid VCM in OTP */
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ret |= imx258_read_reg_otp(client, GZ_VCM_DIR_REG,
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1, &otp_ptr->vcm_dir);
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checksum += otp_ptr->vcm_dir;
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ret |= imx258_read_reg_otp(client, GZ_VCM_START_REG,
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1, &temp);
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checksum += temp;
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ret |= imx258_read_reg_otp(client, GZ_VCM_START_REG + 1,
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1, &otp_ptr->vcm_start);
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checksum += otp_ptr->vcm_start;
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otp_ptr->vcm_start |= (temp << 8);
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ret |= imx258_read_reg_otp(client, GZ_VCM_END_REG,
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1, &temp);
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checksum += temp;
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ret |= imx258_read_reg_otp(client, GZ_VCM_END_REG + 1,
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1, &otp_ptr->vcm_end);
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checksum += otp_ptr->vcm_end;
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otp_ptr->vcm_end |= (temp << 8);
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ret |= imx258_read_reg_otp(client, GZ_VCM_CHECKSUM_REG,
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1, &temp);
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if (ret != 0 || (checksum % 0xff) != temp) {
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dev_err(dev,
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"otp VCM info: check sum (%d,%d),ret = %d !\n",
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checksum, temp, ret);
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goto err;
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}
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dev_dbg(dev, "vcm_info: 0x%x, 0x%x, 0x%x!\n",
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otp_ptr->vcm_start,
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otp_ptr->vcm_end,
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otp_ptr->vcm_dir);
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}
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checksum = 0;
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/* OTP SPC calibration data */
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ret = imx258_read_reg_otp(client, GZ_SPC_FLAG_REG,
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1, &otp_flag);
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if (otp_flag == 0x01) {
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otp_ptr->flag |= 0x08; /* valid LSC in OTP */
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for (i = 0; i < 126; i++) {
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ret |= imx258_read_reg_otp(client,
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GZ_SPC_DATA_START_REG + i,
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1, &temp);
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otp_ptr->spc[i] = (uint8_t)temp;
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checksum += temp;
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dev_dbg(dev,
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"otp read spc addr = 0x%04x, spc[%d] = %d\n",
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GZ_SPC_DATA_START_REG + i, i, temp);
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}
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ret |= imx258_read_reg_otp(client, GZ_SPC_CHECKSUM_REG,
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1, &temp);
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if (ret != 0 || (checksum % 0xff) != temp) {
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dev_err(dev,
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"otp spc info: check sum (%d,%d),ret = %d !\n",
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checksum, temp, ret);
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goto err;
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}
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}
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if (otp_ptr->flag) {
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imx258_eeprom_dev->otp = otp_ptr;
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} else {
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imx258_eeprom_dev->otp = NULL;
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kfree(otp_ptr);
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}
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return 0;
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err:
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imx258_eeprom_dev->otp = NULL;
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kfree(otp_ptr);
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return -EINVAL;
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}
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static int imx258_otp_read(struct imx258_eeprom_device *imx258_eeprom_dev)
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{
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u8 vendor_flag = 0;
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struct i2c_client *client = imx258_eeprom_dev->client;
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vendor_flag = get_vendor_flag(client);
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if (vendor_flag == 0x80)
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imx258_otp_read_gz(imx258_eeprom_dev);
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return 0;
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}
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static long imx258_eeprom_ioctl(struct v4l2_subdev *sd,
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unsigned int cmd, void *arg)
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{
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struct imx258_eeprom_device *imx258_eeprom_dev =
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sd_to_imx258_eeprom(sd);
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imx258_otp_read(imx258_eeprom_dev);
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if (arg && imx258_eeprom_dev->otp)
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memcpy(arg, imx258_eeprom_dev->otp,
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sizeof(struct imx258_otp_info));
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return 0;
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}
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static const struct v4l2_subdev_core_ops imx258_eeprom_core_ops = {
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.ioctl = imx258_eeprom_ioctl,
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};
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static const struct v4l2_subdev_ops imx258_eeprom_ops = {
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.core = &imx258_eeprom_core_ops,
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};
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static void imx258_eeprom_subdev_cleanup(struct imx258_eeprom_device *dev)
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{
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v4l2_device_unregister_subdev(&dev->sd);
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media_entity_cleanup(&dev->sd.entity);
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}
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static int imx258_eeprom_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct imx258_eeprom_device *imx258_eeprom_dev;
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dev_info(&client->dev, "probing...\n");
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imx258_eeprom_dev = devm_kzalloc(&client->dev,
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sizeof(*imx258_eeprom_dev),
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GFP_KERNEL);
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if (imx258_eeprom_dev == NULL) {
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dev_err(&client->dev, "Probe failed\n");
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return -ENOMEM;
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}
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v4l2_i2c_subdev_init(&imx258_eeprom_dev->sd,
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client, &imx258_eeprom_ops);
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imx258_eeprom_dev->client = client;
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pm_runtime_set_active(&client->dev);
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pm_runtime_enable(&client->dev);
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pm_runtime_idle(&client->dev);
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dev_info(&client->dev, "probing successful\n");
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return 0;
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}
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static int imx258_eeprom_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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struct imx258_eeprom_device *imx258_eeprom_dev =
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sd_to_imx258_eeprom(sd);
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kfree(imx258_eeprom_dev->otp);
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pm_runtime_disable(&client->dev);
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imx258_eeprom_subdev_cleanup(imx258_eeprom_dev);
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return 0;
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}
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static int __maybe_unused imx258_eeprom_suspend(struct device *dev)
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{
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return 0;
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}
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static int __maybe_unused imx258_eeprom_resume(struct device *dev)
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{
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return 0;
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}
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static const struct i2c_device_id imx258_eeprom_id_table[] = {
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{ DEVICE_NAME, 0 },
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{ { 0 } }
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};
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MODULE_DEVICE_TABLE(i2c, imx258_eeprom_id_table);
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static const struct of_device_id imx258_eeprom_of_table[] = {
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{ .compatible = "sony,imx258_eeprom" },
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{ { 0 } }
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};
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MODULE_DEVICE_TABLE(of, imx258_eeprom_of_table);
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static const struct dev_pm_ops imx258_eeprom_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(imx258_eeprom_suspend, imx258_eeprom_resume)
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SET_RUNTIME_PM_OPS(imx258_eeprom_suspend, imx258_eeprom_resume, NULL)
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};
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static struct i2c_driver imx258_eeprom_i2c_driver = {
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.driver = {
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.name = DEVICE_NAME,
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.pm = &imx258_eeprom_pm_ops,
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.of_match_table = imx258_eeprom_of_table,
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},
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.probe = &imx258_eeprom_probe,
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.remove = &imx258_eeprom_remove,
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.id_table = imx258_eeprom_id_table,
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};
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module_i2c_driver(imx258_eeprom_i2c_driver);
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MODULE_DESCRIPTION("IMX258 OTP driver");
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MODULE_LICENSE("GPL v2");
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