diff options
Diffstat (limited to 'drivers/nfc/s3fwrn5/phy_common.c')
-rw-r--r-- | drivers/nfc/s3fwrn5/phy_common.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/nfc/s3fwrn5/phy_common.c b/drivers/nfc/s3fwrn5/phy_common.c new file mode 100644 index 0000000000..81318478d5 --- /dev/null +++ b/drivers/nfc/s3fwrn5/phy_common.c @@ -0,0 +1,76 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Link Layer for Samsung S3FWRN5 NCI based Driver + * + * Copyright (C) 2015 Samsung Electrnoics + * Robert Baldyga <r.baldyga@samsung.com> + * Copyright (C) 2020 Samsung Electrnoics + * Bongsu Jeon <bongsu.jeon@samsung.com> + */ + +#include <linux/gpio.h> +#include <linux/delay.h> +#include <linux/module.h> + +#include "phy_common.h" + +void s3fwrn5_phy_set_wake(void *phy_id, bool wake) +{ + struct phy_common *phy = phy_id; + + mutex_lock(&phy->mutex); + gpio_set_value(phy->gpio_fw_wake, wake); + if (wake) + msleep(S3FWRN5_EN_WAIT_TIME); + mutex_unlock(&phy->mutex); +} +EXPORT_SYMBOL(s3fwrn5_phy_set_wake); + +bool s3fwrn5_phy_power_ctrl(struct phy_common *phy, enum s3fwrn5_mode mode) +{ + if (phy->mode == mode) + return false; + + phy->mode = mode; + + gpio_set_value(phy->gpio_en, 1); + gpio_set_value(phy->gpio_fw_wake, 0); + if (mode == S3FWRN5_MODE_FW) + gpio_set_value(phy->gpio_fw_wake, 1); + + if (mode != S3FWRN5_MODE_COLD) { + msleep(S3FWRN5_EN_WAIT_TIME); + gpio_set_value(phy->gpio_en, 0); + msleep(S3FWRN5_EN_WAIT_TIME); + } + + return true; +} +EXPORT_SYMBOL(s3fwrn5_phy_power_ctrl); + +void s3fwrn5_phy_set_mode(void *phy_id, enum s3fwrn5_mode mode) +{ + struct phy_common *phy = phy_id; + + mutex_lock(&phy->mutex); + + s3fwrn5_phy_power_ctrl(phy, mode); + + mutex_unlock(&phy->mutex); +} +EXPORT_SYMBOL(s3fwrn5_phy_set_mode); + +enum s3fwrn5_mode s3fwrn5_phy_get_mode(void *phy_id) +{ + struct phy_common *phy = phy_id; + enum s3fwrn5_mode mode; + + mutex_lock(&phy->mutex); + + mode = phy->mode; + + mutex_unlock(&phy->mutex); + + return mode; +} +EXPORT_SYMBOL(s3fwrn5_phy_get_mode); |