diff options
author | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-05-19 13:30:27 +0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-05-20 15:51:29 +0300 |
commit | 4f78f0840ffe4cfb03ea7bc5152b86a1efbdcfb0 (patch) | |
tree | 8a881d72cce41a0a50b815a39a3506b1477061d1 /drivers/staging/media/atomisp/i2c | |
parent | 5589ea0745ef4fd00c2df83bad82b2aa75f50535 (diff) | |
download | linux-4f78f0840ffe4cfb03ea7bc5152b86a1efbdcfb0.tar.xz |
media: atomisp: use read/write routines from mainstream
There is an ov2680 driver mainstream. Use the read/write
routines from it, as the ones inside this driver are
generating some errors:
ov2680 i2c-OVTI2680:00: ov2680_i2c_write: i2c write reg=0x3086, value 0x00, error -121
Maybe the code that changes from/to BE are not right.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/staging/media/atomisp/i2c')
-rw-r--r-- | drivers/staging/media/atomisp/i2c/atomisp-ov2680.c | 160 |
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, ®_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, ®_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, ®_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, ®_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, ®_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, ®_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, ®_v); if (ret) goto err; - ret = ov2680_read_reg(client, OV2680_8BIT, + ret = ov2680_read_reg(client, 1, OV2680_EXPOSURE_M, ®_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, ®_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 |