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-rw-r--r--drivers/staging/media/atomisp/i2c/atomisp-ov2680.c160
1 files changed, 61 insertions, 99 deletions
diff --git a/drivers/staging/media/atomisp/i2c/atomisp-ov2680.c b/drivers/staging/media/atomisp/i2c/atomisp-ov2680.c
index 6cf507ee8c1b..b63574bf3795 100644
--- a/drivers/staging/media/atomisp/i2c/atomisp-ov2680.c
+++ b/drivers/staging/media/atomisp/i2c/atomisp-ov2680.c
@@ -14,6 +14,8 @@
*
*/
+#include <asm/unaligned.h>
+
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
@@ -45,59 +47,34 @@ static enum atomisp_bayer_order ov2680_bayer_order_mapping[] = {
/* i2c read/write stuff */
static int ov2680_read_reg(struct i2c_client *client,
- u16 data_length, u16 reg, u16 *val)
+ int len, u16 reg, u16 *val)
{
- int err;
- struct i2c_msg msg[2];
- unsigned char data[6];
-
- if (!client->adapter) {
- dev_err(&client->dev, "%s error, no client->adapter\n",
- __func__);
- return -ENODEV;
- }
+ struct i2c_msg msgs[2];
+ u8 addr_buf[2] = { reg >> 8, reg & 0xff };
+ u8 data_buf[4] = { 0, };
+ int ret;
- if (data_length != OV2680_8BIT && data_length != OV2680_16BIT
- && data_length != OV2680_32BIT) {
- dev_err(&client->dev, "%s error, invalid data length\n",
- __func__);
+ if (len > 4)
return -EINVAL;
- }
-
- memset(msg, 0, sizeof(msg));
-
- msg[0].addr = client->addr;
- msg[0].flags = 0;
- msg[0].len = I2C_MSG_LENGTH;
- msg[0].buf = data;
- /* high byte goes out first */
- data[0] = (u8)(reg >> 8);
- data[1] = (u8)(reg & 0xff);
+ msgs[0].addr = client->addr;
+ msgs[0].flags = 0;
+ msgs[0].len = ARRAY_SIZE(addr_buf);
+ msgs[0].buf = addr_buf;
- msg[1].addr = client->addr;
- msg[1].len = data_length;
- msg[1].flags = I2C_M_RD;
- msg[1].buf = data;
+ msgs[1].addr = client->addr;
+ msgs[1].flags = I2C_M_RD;
+ msgs[1].len = len;
+ msgs[1].buf = &data_buf[4 - len];
- err = i2c_transfer(client->adapter, msg, 2);
- if (err != 2) {
- if (err >= 0)
- err = -EIO;
- dev_err(&client->dev,
- "read from offset 0x%x error %d", reg, err);
- return err;
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret != ARRAY_SIZE(msgs)) {
+ dev_err(&client->dev, "read error: reg=0x%4x: %d\n", reg, ret);
+ return -EIO;
}
- *val = 0;
- /* high byte comes first */
- if (data_length == OV2680_8BIT)
- *val = (u8)data[0];
- else if (data_length == OV2680_16BIT)
- *val = be16_to_cpu(*(__be16 *)&data[0]);
- else
- *val = be32_to_cpu(*(__be32 *)&data[0]);
- //dev_dbg(&client->dev, "++++i2c read adr%x = %x\n", reg,*val);
+ *val = get_unaligned_be32(data_buf);
+
return 0;
}
@@ -120,39 +97,24 @@ static int ov2680_i2c_write(struct i2c_client *client, u16 len, u8 *data)
return ret == num_msg ? 0 : ret;
}
-static int ov2680_write_reg(struct i2c_client *client, u16 data_length,
+static int ov2680_write_reg(struct i2c_client *client, unsigned int len,
u16 reg, u16 val)
{
+ u8 buf[6];
int ret;
- unsigned char data[4] = {0};
- __be16 *wreg = (void *)data;
- const u16 len = data_length + sizeof(u16); /* 16-bit address + data */
- if (data_length != OV2680_8BIT && data_length != OV2680_16BIT) {
- dev_err(&client->dev,
- "%s error, invalid data_length\n", __func__);
+ if (len > 4)
return -EINVAL;
- }
-
- /* high byte goes out first */
- *wreg = cpu_to_be16(reg);
-
- if (data_length == OV2680_8BIT) {
- data[2] = (u8)(val);
- } else {
- /* OV2680_16BIT */
- __be16 *wdata = (void *)&data[2];
- *wdata = cpu_to_be16(val);
+ put_unaligned_be16(reg, buf);
+ put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
+ ret = i2c_master_send(client, buf, len + 2);
+ if (ret != len + 2) {
+ dev_err(&client->dev, "write error: reg=0x%4x: %d\n", reg, ret);
+ return -EIO;
}
- ret = ov2680_i2c_write(client, len, data);
- if (ret)
- dev_err(&client->dev,
- "write error: wrote 0x%x to offset 0x%02x error %d",
- val, reg, ret);
-
- return ret;
+ return 0;
}
/*
@@ -359,37 +321,37 @@ static int ov2680_get_intg_factor(struct i2c_client *client,
buf->read_mode = res->bin_mode;
/* get the cropping and output resolution to ISP for this mode. */
- ret = ov2680_read_reg(client, OV2680_16BIT,
+ ret = ov2680_read_reg(client, 2,
OV2680_HORIZONTAL_START_H, &reg_val);
if (ret)
return ret;
buf->crop_horizontal_start = reg_val;
- ret = ov2680_read_reg(client, OV2680_16BIT,
+ ret = ov2680_read_reg(client, 2,
OV2680_VERTICAL_START_H, &reg_val);
if (ret)
return ret;
buf->crop_vertical_start = reg_val;
- ret = ov2680_read_reg(client, OV2680_16BIT,
+ ret = ov2680_read_reg(client, 2,
OV2680_HORIZONTAL_END_H, &reg_val);
if (ret)
return ret;
buf->crop_horizontal_end = reg_val;
- ret = ov2680_read_reg(client, OV2680_16BIT,
+ ret = ov2680_read_reg(client, 2,
OV2680_VERTICAL_END_H, &reg_val);
if (ret)
return ret;
buf->crop_vertical_end = reg_val;
- ret = ov2680_read_reg(client, OV2680_16BIT,
+ ret = ov2680_read_reg(client, 2,
OV2680_HORIZONTAL_OUTPUT_SIZE_H, &reg_val);
if (ret)
return ret;
buf->output_width = reg_val;
- ret = ov2680_read_reg(client, OV2680_16BIT,
+ ret = ov2680_read_reg(client, 2,
OV2680_VERTICAL_OUTPUT_SIZE_H, &reg_val);
if (ret)
return ret;
@@ -418,7 +380,7 @@ static long __ov2680_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
vts = ov2680_res[dev->fmt_idx].lines_per_frame;
/* group hold */
- ret = ov2680_write_reg(client, OV2680_8BIT,
+ ret = ov2680_write_reg(client, 1,
OV2680_GROUP_ACCESS, 0x00);
if (ret) {
dev_err(&client->dev, "%s: write 0x%02x: error, aborted\n",
@@ -430,7 +392,7 @@ static long __ov2680_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
if (coarse_itg > vts - OV2680_INTEGRATION_TIME_MARGIN)
vts = (u16)coarse_itg + OV2680_INTEGRATION_TIME_MARGIN;
- ret = ov2680_write_reg(client, OV2680_16BIT, OV2680_TIMING_VTS_H, vts);
+ ret = ov2680_write_reg(client, 2, OV2680_TIMING_VTS_H, vts);
if (ret) {
dev_err(&client->dev, "%s: write 0x%02x: error, aborted\n",
__func__, OV2680_TIMING_VTS_H);
@@ -441,7 +403,7 @@ static long __ov2680_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
/* Lower four bit should be 0*/
exp_val = coarse_itg << 4;
- ret = ov2680_write_reg(client, OV2680_8BIT,
+ ret = ov2680_write_reg(client, 1,
OV2680_EXPOSURE_L, exp_val & 0xFF);
if (ret) {
dev_err(&client->dev, "%s: write 0x%02x: error, aborted\n",
@@ -449,7 +411,7 @@ static long __ov2680_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
return ret;
}
- ret = ov2680_write_reg(client, OV2680_8BIT,
+ ret = ov2680_write_reg(client, 1,
OV2680_EXPOSURE_M, (exp_val >> 8) & 0xFF);
if (ret) {
dev_err(&client->dev, "%s: write 0x%02x: error, aborted\n",
@@ -457,7 +419,7 @@ static long __ov2680_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
return ret;
}
- ret = ov2680_write_reg(client, OV2680_8BIT,
+ ret = ov2680_write_reg(client, 1,
OV2680_EXPOSURE_H, (exp_val >> 16) & 0x0F);
if (ret) {
dev_err(&client->dev, "%s: write 0x%02x: error, aborted\n",
@@ -466,7 +428,7 @@ static long __ov2680_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
}
/* Analog gain */
- ret = ov2680_write_reg(client, OV2680_16BIT, OV2680_AGC_H, gain);
+ ret = ov2680_write_reg(client, 2, OV2680_AGC_H, gain);
if (ret) {
dev_err(&client->dev, "%s: write 0x%02x: error, aborted\n",
__func__, OV2680_AGC_H);
@@ -474,7 +436,7 @@ static long __ov2680_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
}
/* Digital gain */
if (digitgain) {
- ret = ov2680_write_reg(client, OV2680_16BIT,
+ ret = ov2680_write_reg(client, 2,
OV2680_MWB_RED_GAIN_H, digitgain);
if (ret) {
dev_err(&client->dev,
@@ -483,7 +445,7 @@ static long __ov2680_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
return ret;
}
- ret = ov2680_write_reg(client, OV2680_16BIT,
+ ret = ov2680_write_reg(client, 2,
OV2680_MWB_GREEN_GAIN_H, digitgain);
if (ret) {
dev_err(&client->dev,
@@ -492,7 +454,7 @@ static long __ov2680_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
return ret;
}
- ret = ov2680_write_reg(client, OV2680_16BIT,
+ ret = ov2680_write_reg(client, 2,
OV2680_MWB_BLUE_GAIN_H, digitgain);
if (ret) {
dev_err(&client->dev,
@@ -503,13 +465,13 @@ static long __ov2680_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
}
/* End group */
- ret = ov2680_write_reg(client, OV2680_8BIT,
+ ret = ov2680_write_reg(client, 1,
OV2680_GROUP_ACCESS, 0x10);
if (ret)
return ret;
/* Delay launch group */
- ret = ov2680_write_reg(client, OV2680_8BIT,
+ ret = ov2680_write_reg(client, 1,
OV2680_GROUP_ACCESS, 0xa0);
if (ret)
return ret;
@@ -570,20 +532,20 @@ static int ov2680_q_exposure(struct v4l2_subdev *sd, s32 *value)
int ret;
/* get exposure */
- ret = ov2680_read_reg(client, OV2680_8BIT,
+ ret = ov2680_read_reg(client, 1,
OV2680_EXPOSURE_L,
&reg_v);
if (ret)
goto err;
- ret = ov2680_read_reg(client, OV2680_8BIT,
+ ret = ov2680_read_reg(client, 1,
OV2680_EXPOSURE_M,
&reg_v2);
if (ret)
goto err;
reg_v += reg_v2 << 8;
- ret = ov2680_read_reg(client, OV2680_8BIT,
+ ret = ov2680_read_reg(client, 1,
OV2680_EXPOSURE_H,
&reg_v2);
if (ret)
@@ -619,7 +581,7 @@ static int ov2680_v_flip(struct v4l2_subdev *sd, s32 value)
u8 index;
dev_dbg(&client->dev, "@%s: value:%d\n", __func__, value);
- ret = ov2680_read_reg(client, OV2680_8BIT, OV2680_FLIP_REG, &val);
+ ret = ov2680_read_reg(client, 1, OV2680_FLIP_REG, &val);
if (ret)
return ret;
if (value) {
@@ -627,7 +589,7 @@ static int ov2680_v_flip(struct v4l2_subdev *sd, s32 value)
} else {
val &= ~OV2680_FLIP_MIRROR_BIT_ENABLE;
}
- ret = ov2680_write_reg(client, OV2680_8BIT,
+ ret = ov2680_write_reg(client, 1,
OV2680_FLIP_REG, val);
if (ret)
return ret;
@@ -653,7 +615,7 @@ static int ov2680_h_flip(struct v4l2_subdev *sd, s32 value)
dev_dbg(&client->dev, "@%s: value:%d\n", __func__, value);
- ret = ov2680_read_reg(client, OV2680_8BIT, OV2680_MIRROR_REG, &val);
+ ret = ov2680_read_reg(client, 1, OV2680_MIRROR_REG, &val);
if (ret)
return ret;
if (value) {
@@ -661,7 +623,7 @@ static int ov2680_h_flip(struct v4l2_subdev *sd, s32 value)
} else {
val &= ~OV2680_FLIP_MIRROR_BIT_ENABLE;
}
- ret = ov2680_write_reg(client, OV2680_8BIT,
+ ret = ov2680_write_reg(client, 1,
OV2680_MIRROR_REG, val);
if (ret)
return ret;
@@ -831,7 +793,7 @@ static int ov2680_init_registers(struct v4l2_subdev *sd)
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
- ret = ov2680_write_reg(client, OV2680_8BIT, OV2680_SW_RESET, 0x01);
+ ret = ov2680_write_reg(client, 1, OV2680_SW_RESET, 0x01);
ret |= ov2680_write_reg_array(client, ov2680_global_setting);
return ret;
@@ -1183,13 +1145,13 @@ static int ov2680_detect(struct i2c_client *client)
if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
return -ENODEV;
- ret = ov2680_read_reg(client, OV2680_8BIT,
+ ret = ov2680_read_reg(client, 1,
OV2680_SC_CMMN_CHIP_ID_H, &high);
if (ret) {
dev_err(&client->dev, "sensor_id_high = 0x%x\n", high);
return -ENODEV;
}
- ret = ov2680_read_reg(client, OV2680_8BIT,
+ ret = ov2680_read_reg(client, 1,
OV2680_SC_CMMN_CHIP_ID_L, &low);
id = ((((u16)high) << 8) | (u16)low);
@@ -1198,7 +1160,7 @@ static int ov2680_detect(struct i2c_client *client)
return -ENODEV;
}
- ret = ov2680_read_reg(client, OV2680_8BIT,
+ ret = ov2680_read_reg(client, 1,
OV2680_SC_CMMN_SUB_ID, &high);
revision = (u8)high & 0x0f;
@@ -1220,7 +1182,7 @@ static int ov2680_s_stream(struct v4l2_subdev *sd, int enable)
else
dev_dbg(&client->dev, "ov2680_s_stream off\n");
- ret = ov2680_write_reg(client, OV2680_8BIT, OV2680_SW_STREAM,
+ ret = ov2680_write_reg(client, 1, OV2680_SW_STREAM,
enable ? OV2680_START_STREAMING :
OV2680_STOP_STREAMING);
#if 0
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-04 21:46:18 +0000