diff options
Diffstat (limited to 'drivers/staging/media/atomisp/i2c/ov8858.c')
| -rw-r--r-- | drivers/staging/media/atomisp/i2c/ov8858.c | 2224 |
1 files changed, 2224 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/i2c/ov8858.c b/drivers/staging/media/atomisp/i2c/ov8858.c new file mode 100644 index 000000000000..eccb4a3b1c62 --- /dev/null +++ b/drivers/staging/media/atomisp/i2c/ov8858.c @@ -0,0 +1,2224 @@ +/* + * Support for OmniVision ov8858 camera sensor. + * + * Copyright (c) 2014 Intel Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version + * 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + * + */ + +#include <linux/delay.h> +#include <linux/module.h> +#include <media/v4l2-device.h> +#include <linux/acpi.h> +#include <linux/atomisp_gmin_platform.h> +#ifdef CONFIG_PLATFORM_BTNS +#include "ov8858_btns.h" +#else +#include "ov8858.h" +#endif +static int ov8858_i2c_read(struct i2c_client *client, u16 len, u16 addr, + u8 *buf) +{ + struct i2c_msg msg[2]; + u8 address[2]; + int err; + + if (!client->adapter) { + dev_err(&client->dev, "%s error, no adapter\n", __func__); + return -ENODEV; + } + + dev_dbg(&client->dev, "%s: len = %d, addr = 0x%04x\n", + __func__, len, addr); + + memset(msg, 0, sizeof(msg)); + + address[0] = (addr >> 8) & 0xff; + address[1] = addr & 0xff; + + msg[0].addr = client->addr; + msg[0].flags = 0; + msg[0].len = I2C_MSG_LENGTH; + msg[0].buf = address; + + msg[1].addr = client->addr; + msg[1].len = len; + msg[1].flags = I2C_M_RD; + msg[1].buf = buf; + + err = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); + if (err != 2) { + if (err >= 0) + err = -EIO; + goto error; + } + + return 0; +error: + dev_err(&client->dev, "reading from address 0x%x error %d", addr, err); + return err; +} + +static int ov8858_read_reg(struct i2c_client *client, u16 type, u16 reg, + u16 *val) +{ + u8 data[OV8858_SHORT_MAX]; + int err; + + dev_dbg(&client->dev, "%s: type = %d, reg = 0x%04x\n", + __func__, type, reg); + + /* read only 8 and 16 bit values */ + if (type != OV8858_8BIT && type != OV8858_16BIT) { + dev_err(&client->dev, "%s error, invalid data length\n", + __func__); + return -EINVAL; + } + + memset(data, 0, sizeof(data)); + + err = ov8858_i2c_read(client, type, reg, data); + if (err) + goto error; + + /* high byte comes first */ + if (type == OV8858_8BIT) + *val = (u8)data[0]; + else + *val = data[0] << 8 | data[1]; + + dev_dbg(&client->dev, "%s: val = 0x%04x\n", __func__, *val); + + return 0; + +error: + dev_err(&client->dev, "read from offset 0x%x error %d", reg, err); + return err; +} + +static int ov8858_i2c_write(struct i2c_client *client, u16 len, u8 *data) +{ + struct i2c_msg msg; + const int num_msg = 1; + int ret; + + msg.addr = client->addr; + msg.flags = 0; + msg.len = len; + msg.buf = data; + + ret = i2c_transfer(client->adapter, &msg, 1); + + return ret == num_msg ? 0 : -EIO; +} + +static int +ov8858_write_reg(struct i2c_client *client, u16 data_length, u16 reg, u16 val) +{ + int ret; + unsigned char data[4] = {0}; + u16 *wreg; + const u16 len = data_length + sizeof(u16); /* 16-bit address + data */ + + dev_dbg(&client->dev, + "%s: data_length = %d, reg = 0x%04x, val = 0x%04x\n", + __func__, data_length, reg, val); + + if (!client->adapter) { + dev_err(&client->dev, "%s error, no adapter\n", __func__); + return -ENODEV; + } + + if (data_length != OV8858_8BIT && data_length != OV8858_16BIT) { + dev_err(&client->dev, "%s error, invalid length\n", __func__); + return -EINVAL; + } + + /* high byte goes out first */ + wreg = (u16 *)data; + *wreg = cpu_to_be16(reg); + + if (data_length == OV8858_8BIT) { + data[2] = (u8)(val); + } else { + /* OV8858_16BIT */ + u16 *wdata = (u16 *)&data[2]; + *wdata = be16_to_cpu(val); + } + + ret = ov8858_i2c_write(client, len, data); + if (ret) + dev_err(&client->dev, + "write error: wrote 0x%x to offset 0x%x error %d", + val, reg, ret); + + return ret; +} + +/* + * ov8858_write_reg_array - Initializes a list of registers + * @client: i2c driver client structure + * @reglist: list of registers to be written + * + * This function initializes a list of registers. When consecutive addresses + * are found in a row on the list, this function creates a buffer and sends + * consecutive data in a single i2c_transfer(). + * + * __ov8858_flush_reg_array(), __ov8858_buf_reg_array() and + * __ov8858_write_reg_is_consecutive() are internal functions to + * ov8858_write_reg_array() and should be not used anywhere else. + * + */ +static int __ov8858_flush_reg_array(struct i2c_client *client, + struct ov8858_write_ctrl *ctrl) +{ + u16 size; + if (ctrl->index == 0) + return 0; + + size = sizeof(u16) + ctrl->index; /* 16-bit address + data */ + ctrl->buffer.addr = cpu_to_be16(ctrl->buffer.addr); + ctrl->index = 0; + + return ov8858_i2c_write(client, size, (u8 *)&ctrl->buffer); +} + +static int __ov8858_buf_reg_array(struct i2c_client *client, + struct ov8858_write_ctrl *ctrl, + const struct ov8858_reg *next) +{ + int size; + u16 *data16; + + switch (next->type) { + case OV8858_8BIT: + size = 1; + ctrl->buffer.data[ctrl->index] = (u8)next->val; + break; + case OV8858_16BIT: + size = 2; + data16 = (u16 *)&ctrl->buffer.data[ctrl->index]; + *data16 = cpu_to_be16((u16)next->val); + break; + default: + return -EINVAL; + } + + /* When first item is added, we need to store its starting address */ + if (ctrl->index == 0) + ctrl->buffer.addr = next->sreg; + + ctrl->index += size; + + /* + * Buffer cannot guarantee free space for u32? Better flush it to avoid + * possible lack of memory for next item. + */ + if (ctrl->index + sizeof(u16) >= OV8858_MAX_WRITE_BUF_SIZE) + __ov8858_flush_reg_array(client, ctrl); + + return 0; +} + +static int +__ov8858_write_reg_is_consecutive(struct i2c_client *client, + struct ov8858_write_ctrl *ctrl, + const struct ov8858_reg *next) +{ + if (ctrl->index == 0) + return 1; + + return ctrl->buffer.addr + ctrl->index == next->sreg; +} + +static int ov8858_write_reg_array(struct i2c_client *client, + const struct ov8858_reg *reglist) +{ + const struct ov8858_reg *next = reglist; + struct ov8858_write_ctrl ctrl; + int err; + + ctrl.index = 0; + for (; next->type != OV8858_TOK_TERM; next++) { + switch (next->type & OV8858_TOK_MASK) { + case OV8858_TOK_DELAY: + err = __ov8858_flush_reg_array(client, &ctrl); + if (err) + return err; + msleep(next->val); + break; + + default: + /* + * If next address is not consecutive, data needs to be + * flushed before proceeding + */ + if (!__ov8858_write_reg_is_consecutive(client, + &ctrl, next)) { + err = __ov8858_flush_reg_array(client, &ctrl); + if (err) + return err; + } + err = __ov8858_buf_reg_array(client, &ctrl, next); + if (err) { + dev_err(&client->dev, "%s: write error\n", + __func__); + return err; + } + break; + } + } + + return __ov8858_flush_reg_array(client, &ctrl); +} + +static int __ov8858_min_fps_diff(int fps, + const struct ov8858_fps_setting *fps_list) +{ + int diff = INT_MAX; + int i; + + if (fps == 0) + return 0; + + for (i = 0; i < MAX_FPS_OPTIONS_SUPPORTED; i++) { + if (!fps_list[i].fps) + break; + if (abs(fps_list[i].fps - fps) < diff) + diff = abs(fps_list[i].fps - fps); + } + + return diff; +} + +static int __ov8858_nearest_fps_index(int fps, + const struct ov8858_fps_setting *fps_list) +{ + int fps_index = 0; + int i; + + for (i = 0; i < MAX_FPS_OPTIONS_SUPPORTED; i++) { + if (!fps_list[i].fps) + break; + if (abs(fps_list[i].fps - fps) + < abs(fps_list[fps_index].fps - fps)) + fps_index = i; + } + return fps_index; +} + +static int __ov8858_update_frame_timing(struct v4l2_subdev *sd, + u16 *hts, u16 *vts) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + int ret; + + + dev_dbg(&client->dev, "%s OV8858_TIMING_HTS=0x%04x\n", + __func__, *hts); + + /* HTS = pixel_per_line / 2 */ + ret = ov8858_write_reg(client, OV8858_16BIT, + OV8858_TIMING_HTS, *hts >> 1); + if (ret) + return ret; + dev_dbg(&client->dev, "%s OV8858_TIMING_VTS=0x%04x\n", + __func__, *vts); + + return ov8858_write_reg(client, OV8858_16BIT, OV8858_TIMING_VTS, *vts); +} + +static int __ov8858_set_exposure(struct v4l2_subdev *sd, int exposure, int gain, + int dig_gain, u16 *hts, u16 *vts) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + int exp_val, ret; + dev_dbg(&client->dev, "%s, exposure = %d, gain=%d, dig_gain=%d\n", + __func__, exposure, gain, dig_gain); + + if (dev->limit_exposure_flag) { + if (exposure > *vts - OV8858_INTEGRATION_TIME_MARGIN) + exposure = *vts - OV8858_INTEGRATION_TIME_MARGIN; + } else { + if (*vts < exposure + OV8858_INTEGRATION_TIME_MARGIN) + *vts = (u16) exposure + OV8858_INTEGRATION_TIME_MARGIN; + } + + ret = __ov8858_update_frame_timing(sd, hts, vts); + if (ret) + return ret; + + /* For ov8858, the low 4 bits are fraction bits and must be kept 0 */ + exp_val = exposure << 4; + ret = ov8858_write_reg(client, OV8858_8BIT, + OV8858_LONG_EXPO+2, exp_val & 0xFF); + if (ret) + return ret; + + ret = ov8858_write_reg(client, OV8858_8BIT, + OV8858_LONG_EXPO+1, (exp_val >> 8) & 0xFF); + if (ret) + return ret; + + ret = ov8858_write_reg(client, OV8858_8BIT, + OV8858_LONG_EXPO, (exp_val >> 16) & 0x0F); + if (ret) + return ret; + + /* Digital gain : to all MWB channel gains */ + if (dig_gain) { + ret = ov8858_write_reg(client, OV8858_16BIT, + OV8858_MWB_RED_GAIN_H, dig_gain); + if (ret) + return ret; + + ret = ov8858_write_reg(client, OV8858_16BIT, + OV8858_MWB_GREEN_GAIN_H, dig_gain); + if (ret) + return ret; + + ret = ov8858_write_reg(client, OV8858_16BIT, + OV8858_MWB_BLUE_GAIN_H, dig_gain); + if (ret) + return ret; + } + + ret = ov8858_write_reg(client, OV8858_16BIT, OV8858_LONG_GAIN, + gain & 0x07ff); + if (ret) + return ret; + + dev->gain = gain; + dev->exposure = exposure; + dev->digital_gain = dig_gain; + + return 0; +} + +static int ov8858_set_exposure(struct v4l2_subdev *sd, int exposure, int gain, + int dig_gain) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + const struct ov8858_resolution *res; + u16 hts, vts; + int ret; + + mutex_lock(&dev->input_lock); + + /* Validate exposure: cannot exceed 16bit value */ + exposure = clamp_t(int, exposure, 0, OV8858_MAX_EXPOSURE_VALUE); + + /* Validate gain: must not exceed maximum 8bit value */ + gain = clamp_t(int, gain, 0, OV8858_MAX_GAIN_VALUE); + + /* Validate digital gain: must not exceed 12 bit value*/ + dig_gain = clamp_t(int, dig_gain, 0, OV8858_MWB_GAIN_MAX); + + res = &dev->curr_res_table[dev->fmt_idx]; + /* + * Vendor: HTS reg value is half the total pixel line + */ + hts = res->fps_options[dev->fps_index].pixels_per_line; + vts = res->fps_options[dev->fps_index].lines_per_frame; + + ret = __ov8858_set_exposure(sd, exposure, gain, dig_gain, &hts, &vts); + + mutex_unlock(&dev->input_lock); + + return ret; +} + +/* + When exposure gain value set to sensor, the sensor changed value. + So we need the function to get real value + */ +static int ov8858_g_update_exposure(struct v4l2_subdev *sd, + struct atomisp_update_exposure *exposure) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + int gain = exposure->gain; + + dev_dbg(&client->dev, "%s: gain: %d, digi_gain: %d\n", __func__, + exposure->gain, exposure->digi_gain); + exposure->update_digi_gain = dev->digital_gain; + /* This real gain value fetching function is provided by vendor */ + exposure->update_gain = (((gain & 0x700) >> 8) + 1) * (gain & 0xFF); + + return 0; +} + +static int ov8858_s_exposure(struct v4l2_subdev *sd, + struct atomisp_exposure *exposure) +{ + return ov8858_set_exposure(sd, exposure->integration_time[0], + exposure->gain[0], exposure->gain[1]); +} + +static int ov8858_priv_int_data_init(struct v4l2_subdev *sd) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + u32 size = OV8858_OTP_END_ADDR - OV8858_OTP_START_ADDR + 1; + int r; + u16 isp_ctrl2 = 0; + + if (!dev->otp_data) { + dev->otp_data = devm_kzalloc(&client->dev, size, GFP_KERNEL); + if (!dev->otp_data) { + dev_err(&client->dev, "%s: can't allocate memory", + __func__); + r = -ENOMEM; + goto error3; + } + + /* Streaming has to be on */ + r = ov8858_write_reg(client, OV8858_8BIT, OV8858_STREAM_MODE, + 0x01); + if (r) + goto error2; + + /* Turn off Dead Pixel Correction */ + r = ov8858_read_reg(client, OV8858_8BIT, + OV8858_OTP_ISP_CTRL2, &isp_ctrl2); + if (r) + goto error1; + + r = ov8858_write_reg(client, OV8858_8BIT, OV8858_OTP_ISP_CTRL2, + isp_ctrl2 & ~OV8858_OTP_DPC_ENABLE); + if (r) + goto error1; + + /* Enable partial OTP read mode */ + r = ov8858_write_reg(client, OV8858_8BIT, OV8858_OTP_MODE_CTRL, + OV8858_OTP_MODE_PROGRAM_DISABLE | + OV8858_OTP_MODE_MANUAL); + if (r) + goto error1; + + /* Set address range of OTP memory to read */ + r = ov8858_write_reg(client, OV8858_16BIT, + OV8858_OTP_START_ADDR_REG, + OV8858_OTP_START_ADDR); + if (r) + goto error1; + + r = ov8858_write_reg(client, OV8858_16BIT, + OV8858_OTP_END_ADDR_REG, + OV8858_OTP_END_ADDR); + if (r) + goto error1; + + /* Load the OTP data into the OTP buffer */ + r = ov8858_write_reg(client, OV8858_8BIT, OV8858_OTP_LOAD_CTRL, + OV8858_OTP_LOAD_ENABLE); + if (r) + goto error1; + + /* Wait for the data to load into the buffer */ + usleep_range(5000, 5500); + + /* Read the OTP data from the buffer */ + r = ov8858_i2c_read(client, size, OV8858_OTP_START_ADDR, + dev->otp_data); + if (r) + goto error1; + + /* Turn on Dead Pixel Correction */ + r = ov8858_write_reg(client, OV8858_8BIT, OV8858_OTP_ISP_CTRL2, + isp_ctrl2 | OV8858_OTP_DPC_ENABLE); + if (r) + goto error1; + + /* Stop streaming */ + r = ov8858_write_reg(client, 1, OV8858_STREAM_MODE, 0x00); + if (r) { + dev_err(&client->dev, "%s: cannot turn off streaming\n", + __func__); + goto error1; + } + } + + + return 0; + +error1: + /* Turn on Dead Pixel Correction and set streaming off */ + ov8858_write_reg(client, OV8858_8BIT, OV8858_OTP_ISP_CTRL2, + isp_ctrl2 | OV8858_OTP_DPC_ENABLE); + ov8858_write_reg(client, 1, OV8858_STREAM_MODE, 0x00); +error2: + devm_kfree(&client->dev, dev->otp_data); + dev->otp_data = NULL; +error3: + dev_err(&client->dev, "%s: OTP reading failed\n", __func__); + return r; +} + +static int ov8858_g_priv_int_data(struct v4l2_subdev *sd, + struct v4l2_private_int_data *priv) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + u32 size = OV8858_OTP_END_ADDR - OV8858_OTP_START_ADDR + 1; + int r; + + mutex_lock(&dev->input_lock); + + if (!dev->otp_data) { + dev_err(&client->dev, "%s: otp data is NULL\n", __func__); + mutex_unlock(&dev->input_lock); + return -EFAULT; + } + + if (copy_to_user(priv->data, dev->otp_data, + min_t(__u32, priv->size, size))) { + r = -EFAULT; + dev_err(&client->dev, "%s: OTP reading failed\n", __func__); + mutex_unlock(&dev->input_lock); + return r; + } + + priv->size = size; + mutex_unlock(&dev->input_lock); + + return 0; +} + +static int __ov8858_init(struct v4l2_subdev *sd) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct ov8858_device *dev = to_ov8858_sensor(sd); + int ret; + dev_dbg(&client->dev, "%s\n", __func__); + + /* Sets the default FPS */ + dev->fps_index = 0; + + /* Set default exposure values (initially start values) */ + dev->exposure = 256; + dev->gain = 16; + dev->digital_gain = 1024; + dev->limit_exposure_flag = false; + + dev_dbg(&client->dev, "%s: Writing basic settings to ov8858\n", + __func__); + ret = ov8858_write_reg_array(client, ov8858_BasicSettings); + if (ret) + return ret; + + return ov8858_priv_int_data_init(sd); +} + +static int ov8858_init(struct v4l2_subdev *sd, u32 val) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + int ret; + + mutex_lock(&dev->input_lock); + ret = __ov8858_init(sd); + mutex_unlock(&dev->input_lock); + + return ret; +} + +static void ov8858_uninit(struct v4l2_subdev *sd) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct v4l2_ctrl *ctrl; + dev_dbg(&client->dev, "%s:\n", __func__); + + dev->exposure = 0; + dev->gain = 0; + dev->digital_gain = 0; + dev->limit_exposure_flag = false; + mutex_unlock(&dev->input_lock); + ctrl = v4l2_ctrl_find(sd->ctrl_handler, + V4L2_CID_EXPOSURE_AUTO_PRIORITY); + if (ctrl) + v4l2_ctrl_s_ctrl(ctrl, V4L2_EXPOSURE_AUTO); + mutex_lock(&dev->input_lock); +} + +static int ov8858_g_comp_delay(struct v4l2_subdev *sd, unsigned int *usec) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct ov8858_device *dev = to_ov8858_sensor(sd); + int ret = 0, exposure; + u16 vts, data; + + if (dev->exposure == 0) { + ret = ov8858_read_reg(client, OV8858_16BIT, + OV8858_LONG_EXPO + 1, &data); + if (ret) + return ret; + exposure = data; + exposure >>= 4; + } else { + exposure = dev->exposure; + } + + ret = ov8858_read_reg(client, OV8858_16BIT, OV8858_TIMING_VTS, &vts); + if (ret || vts == 0) + vts = OV8858_DEPTH_VTS_CONST; + + *usec = (exposure * 33333 / vts); + if (*usec > OV8858_DEPTH_COMP_CONST) + *usec = *usec - OV8858_DEPTH_COMP_CONST; + else + *usec = OV8858_DEPTH_COMP_CONST; + + return 0; +} + +static long ov8858_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + switch (cmd) { + case ATOMISP_IOC_S_EXPOSURE: + return ov8858_s_exposure(sd, (struct atomisp_exposure *)arg); + case ATOMISP_IOC_G_SENSOR_PRIV_INT_DATA: + return ov8858_g_priv_int_data(sd, arg); + case ATOMISP_IOC_G_DEPTH_SYNC_COMP: + return ov8858_g_comp_delay(sd, (unsigned int *)arg); + case ATOMISP_IOC_G_UPDATE_EXPOSURE: + return ov8858_g_update_exposure(sd, + (struct atomisp_update_exposure *)arg); + default: + dev_dbg(&client->dev, "Unhandled command 0x%X\n", cmd); + return -EINVAL; + } +} + +static int __power_ctrl(struct v4l2_subdev *sd, bool flag) +{ + int ret = 0; + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + + if (!dev || !dev->platform_data) + return -ENODEV; + + /* Non-gmin platforms use the legacy callback */ + if (dev->platform_data->power_ctrl) + return dev->platform_data->power_ctrl(sd, flag); + + if (dev->platform_data->v1p2_ctrl) { + ret = dev->platform_data->v1p2_ctrl(sd, flag); + if (ret) { + dev_err(&client->dev, + "failed to power %s 1.2v power rail\n", + flag ? "up" : "down"); + return ret; + } + } + + if (dev->platform_data->v2p8_ctrl) { + ret = dev->platform_data->v2p8_ctrl(sd, flag); + if (ret) { + dev_err(&client->dev, + "failed to power %s 2.8v power rail\n", + flag ? "up" : "down"); + return ret; + } + } + + if (dev->platform_data->v1p8_ctrl) { + ret = dev->platform_data->v1p8_ctrl(sd, flag); + if (ret) { + dev_err(&client->dev, + "failed to power %s 1.8v power rail\n", + flag ? "up" : "down"); + if (dev->platform_data->v2p8_ctrl) + dev->platform_data->v2p8_ctrl(sd, 0); + return ret; + } + } + + if (flag) + msleep(20); /* Wait for power lines to stabilize */ + return ret; +} + +static int __gpio_ctrl(struct v4l2_subdev *sd, bool flag) +{ + struct i2c_client *client; + struct ov8858_device *dev; + + if (!sd) + return -EINVAL; + + client = v4l2_get_subdevdata(sd); + dev = to_ov8858_sensor(sd); + + if (!client || !dev || !dev->platform_data) + return -ENODEV; + + /* Non-gmin platforms use the legacy callback */ + if (dev->platform_data->gpio_ctrl) + return dev->platform_data->gpio_ctrl(sd, flag); + + if (dev->platform_data->gpio0_ctrl) + return dev->platform_data->gpio0_ctrl(sd, flag); + + dev_err(&client->dev, "failed to find platform gpio callback\n"); + + return -EINVAL; +} + +static int power_up(struct v4l2_subdev *sd) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct ov8858_device *dev = to_ov8858_sensor(sd); + int ret; + dev_dbg(&client->dev, "%s\n", __func__); + + /* Enable power */ + ret = __power_ctrl(sd, 1); + if (ret) { + dev_err(&client->dev, "power rail on failed %d.\n", ret); + goto fail_power; + } + + /* Enable clock */ + ret = dev->platform_data->flisclk_ctrl(sd, 1); + if (ret) { + dev_err(&client->dev, "flisclk on failed %d\n", ret); + goto fail_clk; + } + + /* Release reset */ + ret = __gpio_ctrl(sd, 1); + if (ret) { + dev_err(&client->dev, "gpio on failed %d\n", ret); + goto fail_gpio; + } + + /* Minumum delay is 8192 clock cycles before first i2c transaction, + * which is 1.37 ms at the lowest allowed clock rate 6 MHz */ + usleep_range(2000, 2500); + return 0; + +fail_gpio: + dev->platform_data->flisclk_ctrl(sd, 0); +fail_clk: + __power_ctrl(sd, 0); +fail_power: + dev_err(&client->dev, "Sensor power-up failed\n"); + + return ret; +} + +static int power_down(struct v4l2_subdev *sd) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + int ret; + dev_dbg(&client->dev, "%s\n", __func__); + + ret = dev->platform_data->flisclk_ctrl(sd, 0); + if (ret) + dev_err(&client->dev, "flisclk off failed\n"); + + ret = __gpio_ctrl(sd, 0); + if (ret) + dev_err(&client->dev, "gpio off failed\n"); + + ret = __power_ctrl(sd, 0); + if (ret) + dev_err(&client->dev, "power rail off failed.\n"); + + return ret; +} + +static int __ov8858_s_power(struct v4l2_subdev *sd, int on) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + int ret, r = 0; + + if (on == 0) { + ov8858_uninit(sd); + if (dev->vcm_driver && dev->vcm_driver->power_down) + r = dev->vcm_driver->power_down(sd); + ret = power_down(sd); + if (r != 0 && ret == 0) + ret = r; + } else { + ret = power_up(sd); + if (ret) + power_down(sd); + if (dev->vcm_driver && dev->vcm_driver->power_up) { + ret = dev->vcm_driver->power_up(sd); + if (ret) { + power_down(sd); + return ret; + } + } + return __ov8858_init(sd); + } + + return ret; +} + +static int ov8858_s_power(struct v4l2_subdev *sd, int on) +{ + int ret; + struct ov8858_device *dev = to_ov8858_sensor(sd); + + mutex_lock(&dev->input_lock); + ret = __ov8858_s_power(sd, on); + mutex_unlock(&dev->input_lock); + + /* + * FIXME: Compatibility with old behaviour: return to preview + * when the device is power cycled. + */ + if (!ret && on) + v4l2_ctrl_s_ctrl(dev->run_mode, ATOMISP_RUN_MODE_PREVIEW); + + return ret; +} + +/* + * Return value of the specified register, first try getting it from + * the register list and if not found, get from the sensor via i2c. + */ +static int ov8858_get_register(struct v4l2_subdev *sd, int reg, int type, + const struct ov8858_reg *reglist) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + const struct ov8858_reg *next; + u16 val; + + /* Try if the values are in the register list */ + for (next = reglist; next->type != OV8858_TOK_TERM; next++) { + if (next->sreg == reg) { + if (type == OV8858_8BIT) + return next->val; + + if (type == OV8858_16BIT && + next[1].type != OV8858_TOK_TERM) + return next[0].val << 8 | next[1].val; + } + } + + /* If not, read from sensor */ + if (ov8858_read_reg(client, type, reg, &val)) { + dev_err(&client->dev, "failed to read register 0x%08x\n", reg); + return -EIO; + } + + return val; +} + +static inline int ov8858_get_register_16bit(struct v4l2_subdev *sd, int reg, + const struct ov8858_reg *reglist) +{ + return ov8858_get_register(sd, reg, OV8858_16BIT, reglist); +} + +static inline int ov8858_get_register_8bit(struct v4l2_subdev *sd, int reg, + const struct ov8858_reg *reglist) +{ + return ov8858_get_register(sd, reg, OV8858_8BIT, reglist); +} + +static int __ov8858_get_pll1_values(struct v4l2_subdev *sd, + int *value, + const struct ov8858_reg *reglist) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + unsigned int prediv_idx; + unsigned int multiplier; + unsigned int sys_prediv; + unsigned int prediv_coef[] = {2, 3, 4, 5, 6, 8, 12, 16}; + int ret; + + ret = ov8858_get_register_8bit(sd, OV8858_PLL1_PREDIV0, reglist); + if (ret < 0) + return ret; + + if (ret & OV8858_PLL1_PREDIV0_MASK) + *value /= 2; + + ret = ov8858_get_register_8bit(sd, OV8858_PLL1_PREDIV, reglist); + + if (ret < 0) + return ret; + + prediv_idx = ret & OV8858_PLL1_PREDIV_MASK; + *value = *value * 2 / prediv_coef[prediv_idx]; + + ret = ov8858_get_register_16bit(sd, OV8858_PLL1_MULTIPLIER, reglist); + if (ret < 0) + return ret; + + multiplier = ret; + *value *= multiplier & OV8858_PLL1_MULTIPLIER_MASK; + ret = ov8858_get_register_8bit(sd, OV8858_PLL1_SYS_PRE_DIV, reglist); + + if (ret < 0) + return ret; + + sys_prediv = ret & OV8858_PLL1_SYS_PRE_DIV_MASK; + *value /= (sys_prediv + 3); + ret = ov8858_get_register_8bit(sd, OV8858_PLL1_SYS_DIVIDER, reglist); + + if (ret < 0) + return ret; + + if (ret & OV8858_PLL1_SYS_DIVIDER_MASK) + *value /= 2; + + dev_dbg(&client->dev, "%s: *value: %d\n", __func__, *value); + + return 0; +} + +static int __ov8858_get_pll2a_values(struct v4l2_subdev *sd, int *value, + const struct ov8858_reg *reglist) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + unsigned int prediv_idx; + unsigned int multiplier; + unsigned int prediv_coef[] = {2, 3, 4, 5, 6, 8, 12, 16}; + int ret; + + ret = ov8858_get_register_8bit(sd, OV8858_PLL2_PREDIV0, reglist); + if (ret < 0) + return ret; + + if (ret & OV8858_PLL2_PREDIV0_MASK) + *value /= 2; + + ret = ov8858_get_register_8bit(sd, OV8858_PLL2_PREDIV, reglist); + if (ret < 0) + return ret; + + prediv_idx = (ret & OV8858_PLL2_PREDIV_MASK); + *value = *value * 2 / prediv_coef[prediv_idx]; + + ret = ov8858_get_register_16bit(sd, OV8858_PLL2_MULTIPLIER, reglist); + if (ret < 0) + return ret; + + multiplier = ret; + *value *= multiplier & OV8858_PLL2_MULTIPLIER_MASK; + dev_dbg(&client->dev, "%s: *value: %d\n", __func__, *value); + + return 0; +} +static int __ov8858_get_pll2b_values(struct v4l2_subdev *sd, int *value, + const struct ov8858_reg *reglist) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + unsigned int dac_divider; + int ret; + + ret = ov8858_get_register_8bit(sd, OV8858_PLL2_DAC_DIVIDER, reglist); + if (ret < 0) + return ret; + + dac_divider = (ret & OV8858_PLL2_DAC_DIVIDER_MASK) + 1; + *value /= dac_divider; + + dev_dbg(&client->dev, "%s: *value: %d\n", __func__, *value); + + return 0; +} +static int __ov8858_get_pll2c_values(struct v4l2_subdev *sd, int *value, + const struct ov8858_reg *reglist) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + unsigned int sys_pre_div; + unsigned int sys_divider_idx; + unsigned int sys_divider_coef[] = {2, 3, 4, 5, 6, 7, 8, 10}; + int ret; + + ret = ov8858_get_register_8bit(sd, OV8858_PLL2_SYS_PRE_DIV, reglist); + if (ret < 0) + return ret; + + sys_pre_div = (ret & OV8858_PLL2_SYS_PRE_DIV_MASK) + 1; + *value /= sys_pre_div; + + ret = ov8858_get_register_8bit(sd, OV8858_PLL2_SYS_DIVIDER, reglist); + if (ret < 0) + return ret; + + sys_divider_idx = ret & OV8858_PLL2_SYS_DIVIDER_MASK; + *value *= 2 / sys_divider_coef[sys_divider_idx]; + + dev_dbg(&client->dev, "%s: *value: %d\n", __func__, *value); + + return 0; +} + +static int ov8858_get_intg_factor(struct v4l2_subdev *sd, + struct camera_mipi_info *info, + const struct ov8858_reg *reglist) +{ + const unsigned int ext_clk = 19200000; /* Hz */ + struct atomisp_sensor_mode_data *m = &info->data; + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct device *d = &client->dev; + const struct ov8858_resolution *res = + &dev->curr_res_table[dev->fmt_idx]; + unsigned int pll_sclksel1; + unsigned int pll_sclksel2; + unsigned int sys_pre_div; + unsigned int sclk_pdiv; + unsigned int sclk = ext_clk; + u16 hts; + int ret; + + memset(&info->data, 0, sizeof(info->data)); + + ret = ov8858_get_register_8bit(sd, OV8858_PLL_SCLKSEL1, reglist); + if (ret < 0) + return ret; + + dev_dbg(d, "%s: OV8858_PLL_SCLKSEL1: 0x%02x\n", __func__, ret); + pll_sclksel1 = ret & OV8858_PLL_SCLKSEL1_MASK; + + ret = ov8858_get_register_8bit(sd, OV8858_PLL_SCLKSEL2, reglist); + if (ret < 0) + return ret; + + dev_dbg(d, "%s: OV8858_PLL_SCLKSEL2: 0x%02x\n", __func__, ret); + pll_sclksel2 = ret & OV8858_PLL_SCLKSEL2_MASK; + + if (pll_sclksel2) { + ret = __ov8858_get_pll2a_values(sd, &sclk, reglist); + if (ret < 0) + return ret; + ret = __ov8858_get_pll2b_values(sd, &sclk, reglist); + if (ret < 0) + return ret; + } else if (pll_sclksel1) { + ret = __ov8858_get_pll2a_values(sd, &sclk, reglist); + if (ret < 0) + return ret; + ret = __ov8858_get_pll2c_values(sd, &sclk, reglist); + if (ret < 0) + return ret; + } else { + ret = __ov8858_get_pll1_values(sd, &sclk, reglist); + if (ret < 0) + return ret; + } + + ret = ov8858_get_register_8bit(sd, OV8858_SRB_HOST_INPUT_DIS, reglist); + if (ret < 0) + return ret; + + dev_dbg(d, "%s: OV8858_SRB_HOST_INPUT_DIS: 0x%02x\n", __func__, ret); + + sys_pre_div = ret & OV8858_SYS_PRE_DIV_MASK; + sys_pre_div >>= OV8858_SYS_PRE_DIV_OFFSET; + + if (sys_pre_div == 1) + sclk /= 2; + else if (sys_pre_div == 2) + sclk /= 4; + + sclk_pdiv = ret & OV8858_SCLK_PDIV_MASK; + sclk_pdiv >>= OV8858_SCLK_PDIV_OFFSET; + + if (sclk_pdiv > 1) + sclk /= sclk_pdiv; + + dev_dbg(d, "%s: sclk: %d\n", __func__, sclk); + + dev->vt_pix_clk_freq_mhz = sclk; + m->vt_pix_clk_freq_mhz = sclk; + + /* HTS and VTS */ + m->frame_length_lines = + res->fps_options[dev->fps_index].lines_per_frame; + m->line_length_pck = res->fps_options[dev->fps_index].pixels_per_line; + + m->coarse_integration_time_min = 0; + m->coarse_integration_time_max_margin = OV8858_INTEGRATION_TIME_MARGIN; + ret = ov8858_read_reg(client, OV8858_16BIT, OV8858_TIMING_HTS, &hts); + if (ret < 0) + return ret; + m->hts = hts; + dev_dbg(&client->dev, "%s: get HTS %d\n", __func__, hts); + + /* OV Sensor do not use fine integration time. */ + m->fine_integration_time_min = 0; + m->fine_integration_time_max_margin = 0; + + /* + * read_mode indicate whether binning is used for calculating + * the correct exposure value from the user side. So adapt the + * read mode values accordingly. + */ + m->read_mode = res->bin_factor_x ? + OV8858_READ_MODE_BINNING_ON : OV8858_READ_MODE_BINNING_OFF; + + ret = ov8858_get_register_8bit(sd, OV8858_H_INC_ODD, res->regs); + if (ret < 0) + return ret; + m->binning_factor_x = (ret + 1) / 2; + + ret = ov8858_get_register_8bit(sd, OV8858_V_INC_ODD, res->regs); + if (ret < 0) + return ret; + m->binning_factor_y = (ret + 1) / 2; + + /* Get the cropping and output resolution to ISP for this mode. */ + ret = ov8858_get_register_16bit(sd, OV8858_HORIZONTAL_START_H, + res->regs); + if (ret < 0) + return ret; + + m->crop_horizontal_start = ret; + + ret = ov8858_get_register_16bit(sd, OV8858_VERTICAL_START_H, res->regs); + if (ret < 0) + return ret; + + m->crop_vertical_start = ret; + + ret = ov8858_get_register_16bit(sd, OV8858_HORIZONTAL_END_H, res->regs); + if (ret < 0) + return ret; + + m->crop_horizontal_end = ret; + + ret = ov8858_get_register_16bit(sd, OV8858_VERTICAL_END_H, res->regs); + if (ret < 0) + return ret; + + m->crop_vertical_end = ret; + + ret = ov8858_get_register_16bit(sd, OV8858_HORIZONTAL_OUTPUT_SIZE_H, + res->regs); + if (ret < 0) + return ret; + + m->output_width = ret; + + ret = ov8858_get_register_16bit(sd, OV8858_VERTICAL_OUTPUT_SIZE_H, + res->regs); + if (ret < 0) + return ret; + + m->output_height = ret; + + return 0; +} + +/* + * distance - calculate the distance + * @res: resolution + * @w: width + * @h: height + * + * Get the gap between res_w/res_h and w/h. + * distance = (res_w/res_h - w/h) / (w/h) * 8192 + * res->width/height smaller than w/h wouldn't be considered. + * The gap of ratio larger than 1/8 wouldn't be considered. + * Returns the value of gap or -1 if fail. + */ +#define LARGEST_ALLOWED_RATIO_MISMATCH 1024 +static int distance(struct ov8858_resolution const *res, const u32 w, + const u32 h) +{ + int ratio; + int distance; + + if (w == 0 || h == 0 || + res->width < w || res->height < h) + return -1; + + ratio = (res->width << 13); + ratio /= w; + ratio *= h; + ratio /= res->height; + + distance = abs(ratio - 8192); + + if (distance > LARGEST_ALLOWED_RATIO_MISMATCH) + return -1; + return distance; +} + +/* + * Returns the nearest higher resolution index. + * @w: width + * @h: height + * matching is done based on enveloping resolution and + * aspect ratio. If the aspect ratio cannot be matched + * to any index, -1 is returned. + */ +static int nearest_resolution_index(struct v4l2_subdev *sd, int w, int h) +{ + int i; + int idx = -1; + int dist; + int fps_diff; + int min_fps_diff = INT_MAX; + int min_dist = INT_MAX; + int min_res_w = INT_MAX; + const struct ov8858_resolution *tmp_res = NULL; + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct ov8858_device *dev = to_ov8858_sensor(sd); + dev_dbg(&client->dev, "%s: w=%d, h=%d\n", __func__, w, h); + + for (i = 0; i < dev->entries_curr_table; i++) { + tmp_res = &dev->curr_res_table[i]; + dist = distance(tmp_res, w, h); + dev_dbg(&client->dev, + "%s[%d]: %dx%d distance=%d\n", tmp_res->desc, + i, tmp_res->width, tmp_res->height, dist); + if (dist == -1) + continue; + if (dist < min_dist) { + min_dist = dist; + min_res_w = tmp_res->width; + min_fps_diff = __ov8858_min_fps_diff(dev->fps, + tmp_res->fps_options); + idx = i; + } + if (dist == min_dist) { + fps_diff = __ov8858_min_fps_diff(dev->fps, + tmp_res->fps_options); + if (fps_diff < min_fps_diff) { + min_fps_diff = fps_diff; + idx = i; + } + if (tmp_res->width < min_res_w) { + min_res_w = tmp_res->width; + idx = i; + } + } + } + + return idx; +} + +static int ov8858_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *format) +{ + struct v4l2_mbus_framefmt *fmt = &format->format; + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct camera_mipi_info *ov8858_info = NULL; + struct i2c_client *client = v4l2_get_subdevdata(sd); + const struct ov8858_resolution *res; + int ret; + int idx; + if (format->pad) + return -EINVAL; + if (!fmt) + return -EINVAL; + + ov8858_info = v4l2_get_subdev_hostdata(sd); + if (ov8858_info == NULL) + return -EINVAL; + + mutex_lock(&dev->input_lock); + + if ((fmt->width > OV8858_RES_WIDTH_MAX) || + (fmt->height > OV8858_RES_HEIGHT_MAX)) { + fmt->width = OV8858_RES_WIDTH_MAX; + fmt->height = OV8858_RES_HEIGHT_MAX; + } else { + idx = nearest_resolution_index(sd, fmt->width, fmt->height); + + /* + * nearest_resolution_index() doesn't return smaller + * resolutions. If it fails, it means the requested resolution + * is higher than we can support. Fallback to highest possible + * resolution in this case. + */ + if (idx == -1) + idx = dev->entries_curr_table - 1; + + fmt->width = dev->curr_res_table[idx].width; + fmt->height = dev->curr_res_table[idx].height; + } + + fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10; + if (format->which == V4L2_SUBDEV_FORMAT_TRY) { + cfg->try_fmt = *fmt; + mutex_unlock(&dev->input_lock); + return 0; + } + + dev->fmt_idx = nearest_resolution_index(sd, fmt->width, fmt->height); + if (dev->fmt_idx == -1) { + ret = -EINVAL; + goto out; + } + res = &dev->curr_res_table[dev->fmt_idx]; + dev_dbg(&client->dev, "%s: selected width = %d, height = %d\n", + __func__, res->width, res->height); + + /* Adjust the FPS selection based on the resolution selected */ + dev->fps_index = __ov8858_nearest_fps_index(dev->fps, res->fps_options); + dev->fps = res->fps_options[dev->fps_index].fps; + dev->regs = res->fps_options[dev->fps_index].regs; + if (!dev->regs) + dev->regs = res->regs; + + ret = ov8858_write_reg_array(client, dev->regs); + if (ret) + goto out; + + dev->pixels_per_line = res->fps_options[dev->fps_index].pixels_per_line; + dev->lines_per_frame = res->fps_options[dev->fps_index].lines_per_frame; + + /* ov8858 only support RGB RAW10 output */ + ov8858_info->metadata_width = res->width * 10 / 8; + ov8858_info->metadata_height = 2; + ov8858_info->metadata_format = ATOMISP_INPUT_FORMAT_EMBEDDED; + + /* Set the initial exposure */ + ret = __ov8858_set_exposure(sd, dev->exposure, dev->gain, + dev->digital_gain, &dev->pixels_per_line, + &dev->lines_per_frame); + if (ret) + goto out; + + ret = ov8858_get_intg_factor(sd, ov8858_info, dev->regs); + +out: + mutex_unlock(&dev->input_lock); + + return ret; +} + +static int ov8858_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *format) +{ + struct v4l2_mbus_framefmt *fmt = &format->format; + struct ov8858_device *dev = to_ov8858_sensor(sd); + + if (format->pad) + return -EINVAL; + if (!fmt) + return -EINVAL; + + mutex_lock(&dev->input_lock); + fmt->width = dev->curr_res_table[dev->fmt_idx].width; + fmt->height = dev->curr_res_table[dev->fmt_idx].height; + fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10; + mutex_unlock(&dev->input_lock); + + return 0; +} + +static int ov8858_detect(struct i2c_client *client, u16 *id) +{ + struct i2c_adapter *adapter = client->adapter; + u16 id_hi = 0; + u16 id_low = 0; + int ret; + + /* i2c check */ + if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) + return -ENODEV; + + dev_dbg(&client->dev, "%s: I2C functionality ok\n", __func__); + ret = ov8858_read_reg(client, OV8858_8BIT, OV8858_CHIP_ID_HIGH, &id_hi); + if (ret) + return ret; + dev_dbg(&client->dev, "%s: id_high = 0x%04x\n", __func__, id_hi); + ret = ov8858_read_reg(client, OV8858_8BIT, OV8858_CHIP_ID_LOW, &id_low); + if (ret) + return ret; + dev_dbg(&client->dev, "%s: id_low = 0x%04x\n", __func__, id_low); + *id = (id_hi << 8) | id_low; + + dev_dbg(&client->dev, "%s: chip_id = 0x%04x\n", __func__, *id); + + dev_info(&client->dev, "%s: chip_id = 0x%04x\n", __func__, *id); + if (*id != OV8858_CHIP_ID) + return -ENODEV; + + /* Stream off now. */ + return ov8858_write_reg(client, OV8858_8BIT, OV8858_STREAM_MODE, 0); +} + +static void __ov8858_print_timing(struct v4l2_subdev *sd) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + u16 width = dev->curr_res_table[dev->fmt_idx].width; + u16 height = dev->curr_res_table[dev->fmt_idx].height; + + dev_dbg(&client->dev, "Dump ov8858 timing in stream on:\n"); + dev_dbg(&client->dev, "width: %d:\n", width); + dev_dbg(&client->dev, "height: %d:\n", height); + dev_dbg(&client->dev, "pixels_per_line: %d:\n", dev->pixels_per_line); + dev_dbg(&client->dev, "line per frame: %d:\n", dev->lines_per_frame); + dev_dbg(&client->dev, "pix freq: %d:\n", dev->vt_pix_clk_freq_mhz); + /* updated formula: pixels_per_line = 2 * HTS */ + /* updated formula: fps = SCLK / (VTS * HTS) */ + dev_dbg(&client->dev, "init fps: %d:\n", dev->vt_pix_clk_freq_mhz / + (dev->pixels_per_line / 2) / dev->lines_per_frame); + dev_dbg(&client->dev, "HBlank: %d nS:\n", + 1000 * (dev->pixels_per_line - width) / + (dev->vt_pix_clk_freq_mhz / 1000000)); + dev_dbg(&client->dev, "VBlank: %d uS:\n", + (dev->lines_per_frame - height) * dev->pixels_per_line / + (dev->vt_pix_clk_freq_mhz / 1000000)); +} + +/* + * ov8858 stream on/off + */ +static int ov8858_s_stream(struct v4l2_subdev *sd, int enable) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + int ret; + u16 val; + dev_dbg(&client->dev, "%s: enable = %d\n", __func__, enable); + + /* Set orientation */ + ret = ov8858_read_reg(client, OV8858_8BIT, OV8858_FORMAT2, &val); + if (ret) + return ret; + + ret = ov8858_write_reg(client, OV8858_8BIT, OV8858_FORMAT2, + dev->hflip ? val | OV8858_FLIP_ENABLE : + val & ~OV8858_FLIP_ENABLE); + if (ret) + return ret; + + ret = ov8858_read_reg(client, OV8858_8BIT, OV8858_FORMAT1, &val); + if (ret) + return ret; + + ret = ov8858_write_reg(client, OV8858_8BIT, OV8858_FORMAT1, + dev->vflip ? val | OV8858_FLIP_ENABLE : + val & ~OV8858_FLIP_ENABLE); + if (ret) + return ret; + + mutex_lock(&dev->input_lock); + if (enable) { + __ov8858_print_timing(sd); + ret = ov8858_write_reg_array(client, ov8858_streaming); + if (ret != 0) { + dev_err(&client->dev, "write_reg_array err\n"); + goto out; + } + dev->streaming = 1; + } else { + ret = ov8858_write_reg_array(client, ov8858_soft_standby); + if (ret != 0) { + dev_err(&client->dev, "write_reg_array err\n"); + goto out; + } + dev->streaming = 0; + dev->fps_index = 0; + dev->fps = 0; + } +out: + mutex_unlock(&dev->input_lock); + return ret; +} + +static int __update_ov8858_device_settings(struct ov8858_device *dev, + u16 sensor_id) +{ + if (sensor_id == OV8858_CHIP_ID) +#ifdef CONFIG_PLATFORM_BTNS + dev->vcm_driver = &ov8858_vcms[OV8858_ID_DEFAULT]; +#else + dev->vcm_driver = &ov8858_vcms[OV8858_SUNNY]; +#endif + else + return -ENODEV; + + if (dev->vcm_driver && dev->vcm_driver->init) + return dev->vcm_driver->init(&dev->sd); + + return 0; +} + +static int ov8858_s_config(struct v4l2_subdev *sd, + int irq, void *pdata) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + u16 sensor_id; + int ret; + + if (pdata == NULL) + return -ENODEV; + + dev->platform_data = pdata; + + mutex_lock(&dev->input_lock); + + if (dev->platform_data->platform_init) { + ret = dev->platform_data->platform_init(client); + if (ret) { + mutex_unlock(&dev->input_lock); + dev_err(&client->dev, "platform init error %d!\n", ret); + return ret; + } + } + + ret = __ov8858_s_power(sd, 1); + if (ret) { + dev_err(&client->dev, "power-up error %d!\n", ret); + mutex_unlock(&dev->input_lock); + return ret; + } + + ret = dev->platform_data->csi_cfg(sd, 1); + if (ret) + goto fail_csi_cfg; + + /* config & detect sensor */ + ret = ov8858_detect(client, &sensor_id); + if (ret) { + dev_err(&client->dev, "detect error %d!\n", ret); + goto fail_detect; + } + + dev->sensor_id = sensor_id; + + /* power off sensor */ + ret = __ov8858_s_power(sd, 0); + if (ret) { + dev->platform_data->csi_cfg(sd, 0); + dev_err(&client->dev, "__ov8858_s_power-down error %d!\n", ret); + goto fail_update; + } + + /* Resolution settings depend on sensor type and platform */ + ret = __update_ov8858_device_settings(dev, dev->sensor_id); + if (ret) { + dev->platform_data->csi_cfg(sd, 0); + dev_err(&client->dev, "__update_ov8858_device_settings error %d!\n", ret); + goto fail_update; + } + + mutex_unlock(&dev->input_lock); + return ret; + +fail_detect: + dev->platform_data->csi_cfg(sd, 0); +fail_csi_cfg: + __ov8858_s_power(sd, 0); +fail_update: + if (dev->platform_data->platform_deinit) + dev->platform_data->platform_deinit(); + mutex_unlock(&dev->input_lock); + dev_err(&client->dev, "sensor power-gating failed\n"); + return ret; +} + +static int +ov8858_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (code->index) + return -EINVAL; + code->code = MEDIA_BUS_FMT_SBGGR10_1X10; + + return 0; +} + +static int +ov8858_enum_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_size_enum *fse) +{ + int index = fse->index; + struct ov8858_device *dev = to_ov8858_sensor(sd); + + mutex_lock(&dev->input_lock); + if (index >= dev->entries_curr_table) { + mutex_unlock(&dev->input_lock); + return -EINVAL; + } + + fse->min_width = dev->curr_res_table[index].width; + fse->min_height = dev->curr_res_table[index].height; + fse->max_width = dev->curr_res_table[index].width; + fse->max_height = dev->curr_res_table[index].height; + mutex_unlock(&dev->input_lock); + + return 0; +} + +static int ov8858_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct ov8858_device *dev = container_of( + ctrl->handler, struct ov8858_device, ctrl_handler); + struct i2c_client *client = v4l2_get_subdevdata(&dev->sd); + + /* input_lock is taken by the control framework, so it + * doesn't need to be taken here. + */ + + switch (ctrl->id) { + case V4L2_CID_RUN_MODE: + switch (ctrl->val) { + case ATOMISP_RUN_MODE_VIDEO: + dev->curr_res_table = ov8858_res_video; + dev->entries_curr_table = ARRAY_SIZE(ov8858_res_video); + break; + case ATOMISP_RUN_MODE_STILL_CAPTURE: + dev->curr_res_table = ov8858_res_still; + dev->entries_curr_table = ARRAY_SIZE(ov8858_res_still); + break; + default: + dev->curr_res_table = ov8858_res_preview; + dev->entries_curr_table = + ARRAY_SIZE(ov8858_res_preview); + } + + dev->fmt_idx = 0; + dev->fps_index = 0; + + return 0; + case V4L2_CID_FOCUS_ABSOLUTE: + if (dev->vcm_driver && dev->vcm_driver->t_focus_abs) + return dev->vcm_driver->t_focus_abs(&dev->sd, + ctrl->val); + return 0; + case V4L2_CID_EXPOSURE_AUTO_PRIORITY: + if (ctrl->val == V4L2_EXPOSURE_AUTO) + dev->limit_exposure_flag = false; + else if (ctrl->val == V4L2_EXPOSURE_APERTURE_PRIORITY) + dev->limit_exposure_flag = true; + return 0; + case V4L2_CID_HFLIP: + dev->hflip = ctrl->val; + return 0; + case V4L2_CID_VFLIP: + dev->vflip = ctrl->val; + return 0; + default: + dev_err(&client->dev, "%s: Error: Invalid ctrl: 0x%X\n", + __func__, ctrl->id); + return -EINVAL; + } +} + +static int ov8858_g_ctrl(struct v4l2_ctrl *ctrl) +{ + struct ov8858_device *dev = container_of( + ctrl->handler, struct ov8858_device, ctrl_handler); + struct i2c_client *client = v4l2_get_subdevdata(&dev->sd); + int r_odd, r_even; + int i = dev->fmt_idx; + + switch (ctrl->id) { + case V4L2_CID_FOCUS_STATUS: + if (dev->vcm_driver && dev->vcm_driver->q_focus_status) + return dev->vcm_driver->q_focus_status(&dev->sd, + &(ctrl->val)); + return 0; + case V4L2_CID_BIN_FACTOR_HORZ: + r_odd = ov8858_get_register_8bit(&dev->sd, OV8858_H_INC_ODD, + dev->curr_res_table[i].regs); + if (r_odd < 0) + return r_odd; + r_even = ov8858_get_register_8bit(&dev->sd, OV8858_H_INC_EVEN, + dev->curr_res_table[i].regs); + if (r_even < 0) + return r_even; + ctrl->val = fls(r_odd + (r_even)) - 2; + return 0; + + case V4L2_CID_BIN_FACTOR_VERT: + r_odd = ov8858_get_register_8bit(&dev->sd, OV8858_V_INC_ODD, + dev->curr_res_table[i].regs); + if (r_odd < 0) + return r_odd; + r_even = ov8858_get_register_8bit(&dev->sd, OV8858_V_INC_EVEN, + dev->curr_res_table[i].regs); + if (r_even < 0) + return r_even; + ctrl->val = fls(r_odd + (r_even)) - 2; + return 0; + case V4L2_CID_HFLIP: + ctrl->val = dev->hflip; + break; + case V4L2_CID_VFLIP: + ctrl->val = dev->vflip; + break; + case V4L2_CID_EXPOSURE_ABSOLUTE: + ctrl->val = dev->exposure; + break; + default: + dev_warn(&client->dev, + "%s: Error: Invalid ctrl: 0x%X\n", __func__, ctrl->id); + return -EINVAL; + } + + return 0; +} + +static int +ov8858_g_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_frame_interval *interval) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + const struct ov8858_resolution *res = + &dev->curr_res_table[dev->fmt_idx]; + + mutex_lock(&dev->input_lock); + interval->interval.denominator = res->fps_options[dev->fps_index].fps; + interval->interval.numerator = 1; + mutex_unlock(&dev->input_lock); + return 0; +} + +static int __ov8858_s_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_frame_interval *interval) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + const struct ov8858_resolution *res = + &dev->curr_res_table[dev->fmt_idx]; + struct camera_mipi_info *info = NULL; + unsigned int fps_index; + int ret = 0; + int fps; + + info = v4l2_get_subdev_hostdata(sd); + if (info == NULL) + return -EINVAL; + + if (!interval->interval.numerator) + interval->interval.numerator = 1; + + fps = interval->interval.denominator / interval->interval.numerator; + + /* No need to proceed further if we are not streaming */ + if (!dev->streaming) { + /* Save the new FPS and use it while selecting setting */ + dev->fps = fps; + return 0; + } + + /* Ignore if we are already using the required FPS. */ + if (fps == res->fps_options[dev->fps_index].fps) + return 0; + + fps_index = __ov8858_nearest_fps_index(fps, res->fps_options); + + if (res->fps_options[fps_index].regs && + res->fps_options[fps_index].regs != dev->regs) { + dev_err(&client->dev, + "Sensor is streaming, can't apply new configuration\n"); + return -EBUSY; + } + + dev->fps_index = fps_index; + dev->fps = res->fps_options[dev->fps_index].fps; + + /* Update the new frametimings based on FPS */ + dev->pixels_per_line = + res->fps_options[dev->fps_index].pixels_per_line; + dev->lines_per_frame = + res->fps_options[dev->fps_index].lines_per_frame; + + /* update frametiming. Conside the curren exposure/gain as well */ + ret = __ov8858_update_frame_timing(sd, + &dev->pixels_per_line, &dev->lines_per_frame); + if (ret) + return ret; + + /* Update the new values so that user side knows the current settings */ + ret = ov8858_get_intg_factor(sd, info, dev->regs); + if (ret) + return ret; + + interval->interval.denominator = res->fps_options[dev->fps_index].fps; + interval->interval.numerator = 1; + __ov8858_print_timing(sd); + + return ret; +} + +static int ov8858_s_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_frame_interval *interval) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + int ret; + + mutex_lock(&dev->input_lock); + ret = __ov8858_s_frame_interval(sd, interval); + mutex_unlock(&dev->input_lock); + + return ret; +} + +static int ov8858_g_skip_frames(struct v4l2_subdev *sd, u32 *frames) +{ + struct ov8858_device *dev = to_ov8858_sensor(sd); + + mutex_lock(&dev->input_lock); + *frames = dev->curr_res_table[dev->fmt_idx].skip_frames; + mutex_unlock(&dev->input_lock); + + return 0; +} + +static const struct v4l2_subdev_sensor_ops ov8858_sensor_ops = { + .g_skip_frames = ov8858_g_skip_frames, +}; + +static const struct v4l2_ctrl_ops ctrl_ops = { + .s_ctrl = ov8858_s_ctrl, + .g_volatile_ctrl = ov8858_g_ctrl, +}; + +static const struct v4l2_subdev_video_ops ov8858_video_ops = { + .s_stream = ov8858_s_stream, + .g_frame_interval = ov8858_g_frame_interval, + .s_frame_interval = ov8858_s_frame_interval, +}; + +static const struct v4l2_subdev_core_ops ov8858_core_ops = { + .s_power = ov8858_s_power, + .ioctl = ov8858_ioctl, + .init = ov8858_init, +}; + +static const struct v4l2_subdev_pad_ops ov8858_pad_ops = { + .enum_mbus_code = ov8858_enum_mbus_code, + .enum_frame_size = ov8858_enum_frame_size, + .get_fmt = ov8858_get_fmt, + .set_fmt = ov8858_set_fmt, +}; + +static const struct v4l2_subdev_ops ov8858_ops = { + .core = &ov8858_core_ops, + .video = &ov8858_video_ops, + .pad = &ov8858_pad_ops, + .sensor = &ov8858_sensor_ops, +}; + +static const struct media_entity_operations ov_entity_ops = { + .link_setup = NULL, +}; + +static int ov8858_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov8858_device *dev = to_ov8858_sensor(sd); + if (dev->platform_data->platform_deinit) + dev->platform_data->platform_deinit(); + + media_entity_cleanup(&dev->sd.entity); + v4l2_ctrl_handler_free(&dev->ctrl_handler); + dev->platform_data->csi_cfg(sd, 0); + v4l2_device_unregister_subdev(sd); + kfree(dev); + + return 0; +} + +static const char * const ctrl_run_mode_menu[] = { + NULL, + "Video", + "Still capture", + "Continuous capture", + "Preview", +}; + +static const struct v4l2_ctrl_config ctrl_run_mode = { + .ops = &ctrl_ops, + .id = V4L2_CID_RUN_MODE, + .name = "run mode", + .type = V4L2_CTRL_TYPE_MENU, + .min = 1, + .def = 4, + .max = 4, + .qmenu = ctrl_run_mode_menu, +}; + +static const struct v4l2_ctrl_config ctrls[] = { + { + .ops = &ctrl_ops, + .id = V4L2_CID_VFLIP, + .name = "Vertical flip", + .type = V4L2_CTRL_TYPE_BOOLEAN, + .min = false, + .max = true, + .step = 1, + }, { + .ops = &ctrl_ops, + .id = V4L2_CID_HFLIP, + .name = "Horizontal flip", + .type = V4L2_CTRL_TYPE_BOOLEAN, + .min = false, + .max = true, + .step = 1, + }, { + .ops = &ctrl_ops, + .id = V4L2_CID_EXPOSURE_ABSOLUTE, + .name = "Absolute exposure", + .type = V4L2_CTRL_TYPE_INTEGER, + .max = 0xffff, + .min = 0x0, + .step = 1, + .def = 0x00, + .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE, + }, { + .ops = &ctrl_ops, + .id = V4L2_CID_FOCUS_ABSOLUTE, + .name = "Focus absolute", + .type = V4L2_CTRL_TYPE_INTEGER, + .step = 1, + .max = OV8858_MAX_FOCUS_POS, + }, { + /* This one is junk: see the spec for proper use of this CID. */ + .ops = &ctrl_ops, + .id = V4L2_CID_FOCUS_STATUS, + .name = "Focus status", + .type = V4L2_CTRL_TYPE_INTEGER, + .step = 1, + .max = 100, + .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE, + }, { + /* This is crap. For compatibility use only. */ + .ops = &ctrl_ops, + .id = V4L2_CID_FOCAL_ABSOLUTE, + .name = "Focal lenght", + .type = V4L2_CTRL_TYPE_INTEGER, + .min = (OV8858_FOCAL_LENGTH_NUM << 16) | + OV8858_FOCAL_LENGTH_DEM, + .max = (OV8858_FOCAL_LENGTH_NUM << 16) | + OV8858_FOCAL_LENGTH_DEM, + .step = 1, + .def = (OV8858_FOCAL_LENGTH_NUM << 16) | + OV8858_FOCAL_LENGTH_DEM, + .flags = V4L2_CTRL_FLAG_READ_ONLY, + }, { + /* This one is crap, too. For compatibility use only. */ + .ops = &ctrl_ops, + .id = V4L2_CID_FNUMBER_ABSOLUTE, + .name = "F-number", + .type = V4L2_CTRL_TYPE_INTEGER, + .min = (OV8858_F_NUMBER_DEFAULT_NUM << 16) | + OV8858_F_NUMBER_DEM, + .max = (OV8858_F_NUMBER_DEFAULT_NUM << 16) | + OV8858_F_NUMBER_DEM, + .step = 1, + .def = (OV8858_F_NUMBER_DEFAULT_NUM << 16) | + OV8858_F_NUMBER_DEM, + .flags = V4L2_CTRL_FLAG_READ_ONLY, + }, { + /* + * The most utter crap. _Never_ use this, even for + * compatibility reasons! + */ + .ops = &ctrl_ops, + .id = V4L2_CID_FNUMBER_RANGE, + .name = "F-number range", + .type = V4L2_CTRL_TYPE_INTEGER, + .min = (OV8858_F_NUMBER_DEFAULT_NUM << 24) | + (OV8858_F_NUMBER_DEM << 16) | + (OV8858_F_NUMBER_DEFAULT_NUM << 8) | + OV8858_F_NUMBER_DEM, + .max = (OV8858_F_NUMBER_DEFAULT_NUM << 24) | + (OV8858_F_NUMBER_DEM << 16) | + (OV8858_F_NUMBER_DEFAULT_NUM << 8) | + OV8858_F_NUMBER_DEM, + .step = 1, + .def = (OV8858_F_NUMBER_DEFAULT_NUM << 24) | + (OV8858_F_NUMBER_DEM << 16) | + (OV8858_F_NUMBER_DEFAULT_NUM << 8) | + OV8858_F_NUMBER_DEM, + .flags = V4L2_CTRL_FLAG_READ_ONLY, + }, { + .ops = &ctrl_ops, + .id = V4L2_CID_BIN_FACTOR_HORZ, + .name = "Horizontal binning factor", + .type = V4L2_CTRL_TYPE_INTEGER, + .max = OV8858_BIN_FACTOR_MAX, + .step = 1, + .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE, + }, { + .ops = &ctrl_ops, + .id = V4L2_CID_BIN_FACTOR_VERT, + .name = "Vertical binning factor", + .type = V4L2_CTRL_TYPE_INTEGER, + .max = OV8858_BIN_FACTOR_MAX, + .step = 1, + .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE, + }, { + .ops = &ctrl_ops, + .id = V4L2_CID_EXPOSURE_AUTO_PRIORITY, + .name = "Exposure auto priority", + .type = V4L2_CTRL_TYPE_INTEGER, + .min = V4L2_EXPOSURE_AUTO, + .max = V4L2_EXPOSURE_APERTURE_PRIORITY, + .step = 1, + } +}; + +static int ov8858_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct ov8858_device *dev; + unsigned int i; + int ret = 0; + struct camera_sensor_platform_data *pdata; + + dev_dbg(&client->dev, "%s:\n", __func__); + + /* allocate sensor device & init sub device */ + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) { + dev_err(&client->dev, "%s: out of memory\n", __func__); + return -ENOMEM; + } + + mutex_init(&dev->input_lock); + + if (id) + dev->i2c_id = id->driver_data; + dev->fmt_idx = 0; + dev->sensor_id = OV_ID_DEFAULT; + dev->vcm_driver = &ov8858_vcms[OV8858_ID_DEFAULT]; + + v4l2_i2c_subdev_init(&(dev->sd), client, &ov8858_ops); + + if (ACPI_COMPANION(&client->dev)) { + pdata = gmin_camera_platform_data(&dev->sd, + ATOMISP_INPUT_FORMAT_RAW_10, + atomisp_bayer_order_bggr); + if (!pdata) { + dev_err(&client->dev, + "%s: failed to get acpi platform data\n", + __func__); + goto out_free; + } + ret = ov8858_s_config(&dev->sd, client->irq, pdata); + if (ret) { + dev_err(&client->dev, + "%s: failed to set config\n", __func__); + goto out_free; + } + ret = atomisp_register_i2c_module(&dev->sd, pdata, RAW_CAMERA); + if (ret) { + dev_err(&client->dev, + "%s: failed to register subdev\n", __func__); + goto out_free; + } + } + /* + * sd->name is updated with sensor driver name by the v4l2. + * change it to sensor name in this case. + */ + snprintf(dev->sd.name, sizeof(dev->sd.name), "%s%x %d-%04x", + OV_SUBDEV_PREFIX, dev->sensor_id, + i2c_adapter_id(client->adapter), client->addr); + + dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + dev->pad.flags = MEDIA_PAD_FL_SOURCE; + dev->format.code = MEDIA_BUS_FMT_SBGGR10_1X10; + dev->sd.entity.ops = &ov_entity_ops; + dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; + + ret = v4l2_ctrl_handler_init(&dev->ctrl_handler, ARRAY_SIZE(ctrls) + 1); + if (ret) { + ov8858_remove(client); + return ret; + } + + dev->run_mode = v4l2_ctrl_new_custom(&dev->ctrl_handler, + &ctrl_run_mode, NULL); + + for (i = 0; i < ARRAY_SIZE(ctrls); i++) + v4l2_ctrl_new_custom(&dev->ctrl_handler, &ctrls[i], NULL); + + if (dev->ctrl_handler.error) { + ov8858_remove(client); + return dev->ctrl_handler.error; + } + + /* Use same lock for controls as for everything else. */ + dev->ctrl_handler.lock = &dev->input_lock; + dev->sd.ctrl_handler = &dev->ctrl_handler; + v4l2_ctrl_handler_setup(&dev->ctrl_handler); + + ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad); + if (ret) { + ov8858_remove(client); + return ret; + } + + return 0; + +out_free: + v4l2_device_unregister_subdev(&dev->sd); + kfree(dev); + return ret; +} + +static const struct i2c_device_id ov8858_id[] = { + {OV8858_NAME, 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, ov8858_id); + +static struct acpi_device_id ov8858_acpi_match[] = { + {"INT3477"}, + {}, +}; + +static struct i2c_driver ov8858_driver = { + .driver = { + .owner = THIS_MODULE, + .name = OV8858_NAME, + .acpi_match_table = ACPI_PTR(ov8858_acpi_match), + }, + .probe = ov8858_probe, + .remove = ov8858_remove, + .id_table = ov8858_id, +}; + +static __init int ov8858_init_mod(void) +{ + int ret; + ret = i2c_add_driver(&ov8858_driver); + return ret; +} + +static __exit void ov8858_exit_mod(void) +{ + i2c_del_driver(&ov8858_driver); +} + +module_init(ov8858_init_mod); +module_exit(ov8858_exit_mod); + +MODULE_DESCRIPTION("A low-level driver for Omnivision OV8858 sensors"); +MODULE_LICENSE("GPL"); |