diff options
Diffstat (limited to 'drivers/media/i2c/ak7375.c')
| -rw-r--r-- | drivers/media/i2c/ak7375.c | 162 |
1 files changed, 119 insertions, 43 deletions
diff --git a/drivers/media/i2c/ak7375.c b/drivers/media/i2c/ak7375.c index 40b1a4aa846c..9a2432cea3ff 100644 --- a/drivers/media/i2c/ak7375.c +++ b/drivers/media/i2c/ak7375.c @@ -6,34 +6,78 @@ #include <linux/i2c.h> #include <linux/module.h> #include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-device.h> -#define AK7375_MAX_FOCUS_POS 4095 -/* - * This sets the minimum granularity for the focus positions. - * A value of 1 gives maximum accuracy for a desired focus position - */ -#define AK7375_FOCUS_STEPS 1 -/* - * This acts as the minimum granularity of lens movement. - * Keep this value power of 2, so the control steps can be - * uniformly adjusted for gradual lens movement, with desired - * number of control steps. - */ -#define AK7375_CTRL_STEPS 64 -#define AK7375_CTRL_DELAY_US 1000 +struct ak73xx_chipdef { + u8 reg_position; + u8 reg_cont; + u8 shift_pos; + u8 mode_active; + u8 mode_standby; + bool has_standby; /* Some chips may not have standby mode */ + u16 focus_pos_max; + /* + * This sets the minimum granularity for the focus positions. + * A value of 1 gives maximum accuracy for a desired focus position + */ + u16 focus_steps; + /* + * This acts as the minimum granularity of lens movement. + * Keep this value power of 2, so the control steps can be + * uniformly adjusted for gradual lens movement, with desired + * number of control steps. + */ + u16 ctrl_steps; + u16 ctrl_delay_us; + /* + * The vcm may take time (tDELAY) to power on and start taking + * I2C messages. + */ + u16 power_delay_us; +}; + +static const struct ak73xx_chipdef ak7345_cdef = { + .reg_position = 0x0, + .reg_cont = 0x2, + .shift_pos = 7, /* 9 bits position values, need to << 7 */ + .mode_active = 0x0, + .has_standby = false, + .focus_pos_max = 511, + .focus_steps = 1, + .ctrl_steps = 16, + .ctrl_delay_us = 1000, + .power_delay_us = 20000, +}; -#define AK7375_REG_POSITION 0x0 -#define AK7375_REG_CONT 0x2 -#define AK7375_MODE_ACTIVE 0x0 -#define AK7375_MODE_STANDBY 0x40 +static const struct ak73xx_chipdef ak7375_cdef = { + .reg_position = 0x0, + .reg_cont = 0x2, + .shift_pos = 4, /* 12 bits position values, need to << 4 */ + .mode_active = 0x0, + .mode_standby = 0x40, + .has_standby = true, + .focus_pos_max = 4095, + .focus_steps = 1, + .ctrl_steps = 64, + .ctrl_delay_us = 1000, + .power_delay_us = 10000, +}; + +static const char * const ak7375_supply_names[] = { + "vdd", + "vio", +}; /* ak7375 device structure */ struct ak7375_device { + const struct ak73xx_chipdef *cdef; struct v4l2_ctrl_handler ctrls_vcm; struct v4l2_subdev sd; struct v4l2_ctrl *focus; + struct regulator_bulk_data supplies[ARRAY_SIZE(ak7375_supply_names)]; + /* active or standby mode */ bool active; }; @@ -73,10 +117,11 @@ static int ak7375_i2c_write(struct ak7375_device *ak7375, static int ak7375_set_ctrl(struct v4l2_ctrl *ctrl) { struct ak7375_device *dev_vcm = to_ak7375_vcm(ctrl); + const struct ak73xx_chipdef *cdef = dev_vcm->cdef; if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) - return ak7375_i2c_write(dev_vcm, AK7375_REG_POSITION, - ctrl->val << 4, 2); + return ak7375_i2c_write(dev_vcm, cdef->reg_position, + ctrl->val << cdef->shift_pos, 2); return -EINVAL; } @@ -115,11 +160,12 @@ static int ak7375_init_controls(struct ak7375_device *dev_vcm) { struct v4l2_ctrl_handler *hdl = &dev_vcm->ctrls_vcm; const struct v4l2_ctrl_ops *ops = &ak7375_vcm_ctrl_ops; + const struct ak73xx_chipdef *cdef = dev_vcm->cdef; v4l2_ctrl_handler_init(hdl, 1); dev_vcm->focus = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE, - 0, AK7375_MAX_FOCUS_POS, AK7375_FOCUS_STEPS, 0); + 0, cdef->focus_pos_max, cdef->focus_steps, 0); if (hdl->error) dev_err(dev_vcm->sd.dev, "%s fail error: 0x%x\n", @@ -133,12 +179,26 @@ static int ak7375_probe(struct i2c_client *client) { struct ak7375_device *ak7375_dev; int ret; + unsigned int i; ak7375_dev = devm_kzalloc(&client->dev, sizeof(*ak7375_dev), GFP_KERNEL); if (!ak7375_dev) return -ENOMEM; + ak7375_dev->cdef = device_get_match_data(&client->dev); + + for (i = 0; i < ARRAY_SIZE(ak7375_supply_names); i++) + ak7375_dev->supplies[i].supply = ak7375_supply_names[i]; + + ret = devm_regulator_bulk_get(&client->dev, + ARRAY_SIZE(ak7375_supply_names), + ak7375_dev->supplies); + if (ret) { + dev_err_probe(&client->dev, ret, "Failed to get regulators\n"); + return ret; + } + v4l2_i2c_subdev_init(&ak7375_dev->sd, client, &ak7375_ops); ak7375_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; ak7375_dev->sd.internal_ops = &ak7375_int_ops; @@ -169,7 +229,7 @@ err_cleanup: return ret; } -static int ak7375_remove(struct i2c_client *client) +static void ak7375_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct ak7375_device *ak7375_dev = sd_to_ak7375_vcm(sd); @@ -177,38 +237,44 @@ static int ak7375_remove(struct i2c_client *client) ak7375_subdev_cleanup(ak7375_dev); pm_runtime_disable(&client->dev); pm_runtime_set_suspended(&client->dev); - - return 0; } /* * This function sets the vcm position, so it consumes least current - * The lens position is gradually moved in units of AK7375_CTRL_STEPS, + * The lens position is gradually moved in units of ctrl_steps, * to make the movements smoothly. */ static int __maybe_unused ak7375_vcm_suspend(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ak7375_device *ak7375_dev = sd_to_ak7375_vcm(sd); + const struct ak73xx_chipdef *cdef = ak7375_dev->cdef; int ret, val; if (!ak7375_dev->active) return 0; - for (val = ak7375_dev->focus->val & ~(AK7375_CTRL_STEPS - 1); - val >= 0; val -= AK7375_CTRL_STEPS) { - ret = ak7375_i2c_write(ak7375_dev, AK7375_REG_POSITION, - val << 4, 2); + for (val = ak7375_dev->focus->val & ~(cdef->ctrl_steps - 1); + val >= 0; val -= cdef->ctrl_steps) { + ret = ak7375_i2c_write(ak7375_dev, cdef->reg_position, + val << cdef->shift_pos, 2); if (ret) dev_err_once(dev, "%s I2C failure: %d\n", __func__, ret); - usleep_range(AK7375_CTRL_DELAY_US, AK7375_CTRL_DELAY_US + 10); + usleep_range(cdef->ctrl_delay_us, cdef->ctrl_delay_us + 10); + } + + if (cdef->has_standby) { + ret = ak7375_i2c_write(ak7375_dev, cdef->reg_cont, + cdef->mode_standby, 1); + if (ret) + dev_err(dev, "%s I2C failure: %d\n", __func__, ret); } - ret = ak7375_i2c_write(ak7375_dev, AK7375_REG_CONT, - AK7375_MODE_STANDBY, 1); + ret = regulator_bulk_disable(ARRAY_SIZE(ak7375_supply_names), + ak7375_dev->supplies); if (ret) - dev_err(dev, "%s I2C failure: %d\n", __func__, ret); + return ret; ak7375_dev->active = false; @@ -218,34 +284,43 @@ static int __maybe_unused ak7375_vcm_suspend(struct device *dev) /* * This function sets the vcm position to the value set by the user * through v4l2_ctrl_ops s_ctrl handler - * The lens position is gradually moved in units of AK7375_CTRL_STEPS, + * The lens position is gradually moved in units of ctrl_steps, * to make the movements smoothly. */ static int __maybe_unused ak7375_vcm_resume(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ak7375_device *ak7375_dev = sd_to_ak7375_vcm(sd); + const struct ak73xx_chipdef *cdef = ak7375_dev->cdef; int ret, val; if (ak7375_dev->active) return 0; - ret = ak7375_i2c_write(ak7375_dev, AK7375_REG_CONT, - AK7375_MODE_ACTIVE, 1); + ret = regulator_bulk_enable(ARRAY_SIZE(ak7375_supply_names), + ak7375_dev->supplies); + if (ret) + return ret; + + /* Wait for vcm to become ready */ + usleep_range(cdef->power_delay_us, cdef->power_delay_us + 500); + + ret = ak7375_i2c_write(ak7375_dev, cdef->reg_cont, + cdef->mode_active, 1); if (ret) { dev_err(dev, "%s I2C failure: %d\n", __func__, ret); return ret; } - for (val = ak7375_dev->focus->val % AK7375_CTRL_STEPS; + for (val = ak7375_dev->focus->val % cdef->ctrl_steps; val <= ak7375_dev->focus->val; - val += AK7375_CTRL_STEPS) { - ret = ak7375_i2c_write(ak7375_dev, AK7375_REG_POSITION, - val << 4, 2); + val += cdef->ctrl_steps) { + ret = ak7375_i2c_write(ak7375_dev, cdef->reg_position, + val << cdef->shift_pos, 2); if (ret) dev_err_ratelimited(dev, "%s I2C failure: %d\n", __func__, ret); - usleep_range(AK7375_CTRL_DELAY_US, AK7375_CTRL_DELAY_US + 10); + usleep_range(cdef->ctrl_delay_us, cdef->ctrl_delay_us + 10); } ak7375_dev->active = true; @@ -254,7 +329,8 @@ static int __maybe_unused ak7375_vcm_resume(struct device *dev) } static const struct of_device_id ak7375_of_table[] = { - { .compatible = "asahi-kasei,ak7375" }, + { .compatible = "asahi-kasei,ak7345", .data = &ak7345_cdef, }, + { .compatible = "asahi-kasei,ak7375", .data = &ak7375_cdef, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, ak7375_of_table); @@ -270,7 +346,7 @@ static struct i2c_driver ak7375_i2c_driver = { .pm = &ak7375_pm_ops, .of_match_table = ak7375_of_table, }, - .probe_new = ak7375_probe, + .probe = ak7375_probe, .remove = ak7375_remove, }; module_i2c_driver(ak7375_i2c_driver); |