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The UART module will use the common blocks. Signed-off-by: Bongsu Jeon --- drivers/nfc/s3fwrn5/i2c.c | 111 ++++++++++++--------------------------- drivers/nfc/s3fwrn5/phy_common.h | 86 ++++++++++++++++++++++++++++++ 2 files changed, 119 insertions(+), 78 deletions(-) create mode 100644 drivers/nfc/s3fwrn5/phy_common.h diff --git a/drivers/nfc/s3fwrn5/i2c.c b/drivers/nfc/s3fwrn5/i2c.c index 9a64eea..cd1b2a7 100644 --- a/drivers/nfc/s3fwrn5/i2c.c +++ b/drivers/nfc/s3fwrn5/i2c.c @@ -15,75 +15,30 @@ #include -#include "s3fwrn5.h" +#include "phy_common.h" #define S3FWRN5_I2C_DRIVER_NAME "s3fwrn5_i2c" -#define S3FWRN5_EN_WAIT_TIME 20 - struct s3fwrn5_i2c_phy { + struct phy_common common; struct i2c_client *i2c_dev; - struct nci_dev *ndev; - - int gpio_en; - int gpio_fw_wake; - - struct mutex mutex; - enum s3fwrn5_mode mode; unsigned int irq_skip:1; }; -static void s3fwrn5_i2c_set_wake(void *phy_id, bool wake) -{ - struct s3fwrn5_i2c_phy *phy = phy_id; - - mutex_lock(&phy->mutex); - gpio_set_value(phy->gpio_fw_wake, wake); - msleep(S3FWRN5_EN_WAIT_TIME); - mutex_unlock(&phy->mutex); -} - static void s3fwrn5_i2c_set_mode(void *phy_id, enum s3fwrn5_mode mode) { struct s3fwrn5_i2c_phy *phy = phy_id; - mutex_lock(&phy->mutex); + mutex_lock(&phy->common.mutex); - if (phy->mode == mode) + if (s3fwrn5_phy_power_ctrl(&phy->common, mode) == false) goto out; - 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); - } - phy->irq_skip = true; out: - mutex_unlock(&phy->mutex); -} - -static enum s3fwrn5_mode s3fwrn5_i2c_get_mode(void *phy_id) -{ - struct s3fwrn5_i2c_phy *phy = phy_id; - enum s3fwrn5_mode mode; - - mutex_lock(&phy->mutex); - - mode = phy->mode; - - mutex_unlock(&phy->mutex); - - return mode; + mutex_unlock(&phy->common.mutex); } static int s3fwrn5_i2c_write(void *phy_id, struct sk_buff *skb) @@ -91,7 +46,7 @@ static int s3fwrn5_i2c_write(void *phy_id, struct sk_buff *skb) struct s3fwrn5_i2c_phy *phy = phy_id; int ret; - mutex_lock(&phy->mutex); + mutex_lock(&phy->common.mutex); phy->irq_skip = false; @@ -102,7 +57,7 @@ static int s3fwrn5_i2c_write(void *phy_id, struct sk_buff *skb) ret = i2c_master_send(phy->i2c_dev, skb->data, skb->len); } - mutex_unlock(&phy->mutex); + mutex_unlock(&phy->common.mutex); if (ret < 0) return ret; @@ -114,9 +69,9 @@ static int s3fwrn5_i2c_write(void *phy_id, struct sk_buff *skb) } static const struct s3fwrn5_phy_ops i2c_phy_ops = { - .set_wake = s3fwrn5_i2c_set_wake, + .set_wake = s3fwrn5_phy_set_wake, .set_mode = s3fwrn5_i2c_set_mode, - .get_mode = s3fwrn5_i2c_get_mode, + .get_mode = s3fwrn5_phy_get_mode, .write = s3fwrn5_i2c_write, }; @@ -128,7 +83,7 @@ static int s3fwrn5_i2c_read(struct s3fwrn5_i2c_phy *phy) char hdr[4]; int ret; - hdr_size = (phy->mode == S3FWRN5_MODE_NCI) ? + hdr_size = (phy->common.mode == S3FWRN5_MODE_NCI) ? NCI_CTRL_HDR_SIZE : S3FWRN5_FW_HDR_SIZE; ret = i2c_master_recv(phy->i2c_dev, hdr, hdr_size); if (ret < 0) @@ -137,7 +92,7 @@ static int s3fwrn5_i2c_read(struct s3fwrn5_i2c_phy *phy) if (ret < hdr_size) return -EBADMSG; - data_len = (phy->mode == S3FWRN5_MODE_NCI) ? + data_len = (phy->common.mode == S3FWRN5_MODE_NCI) ? ((struct nci_ctrl_hdr *)hdr)->plen : ((struct s3fwrn5_fw_header *)hdr)->len; @@ -157,24 +112,24 @@ static int s3fwrn5_i2c_read(struct s3fwrn5_i2c_phy *phy) } out: - return s3fwrn5_recv_frame(phy->ndev, skb, phy->mode); + return s3fwrn5_recv_frame(phy->common.ndev, skb, phy->common.mode); } static irqreturn_t s3fwrn5_i2c_irq_thread_fn(int irq, void *phy_id) { struct s3fwrn5_i2c_phy *phy = phy_id; - if (!phy || !phy->ndev) { + if (!phy || !phy->common.ndev) { WARN_ON_ONCE(1); return IRQ_NONE; } - mutex_lock(&phy->mutex); + mutex_lock(&phy->common.mutex); if (phy->irq_skip) goto out; - switch (phy->mode) { + switch (phy->common.mode) { case S3FWRN5_MODE_NCI: case S3FWRN5_MODE_FW: s3fwrn5_i2c_read(phy); @@ -184,7 +139,7 @@ static irqreturn_t s3fwrn5_i2c_irq_thread_fn(int irq, void *phy_id) } out: - mutex_unlock(&phy->mutex); + mutex_unlock(&phy->common.mutex); return IRQ_HANDLED; } @@ -197,19 +152,19 @@ static int s3fwrn5_i2c_parse_dt(struct i2c_client *client) if (!np) return -ENODEV; - phy->gpio_en = of_get_named_gpio(np, "en-gpios", 0); - if (!gpio_is_valid(phy->gpio_en)) { + phy->common.gpio_en = of_get_named_gpio(np, "en-gpios", 0); + if (!gpio_is_valid(phy->common.gpio_en)) { /* Support also deprecated property */ - phy->gpio_en = of_get_named_gpio(np, "s3fwrn5,en-gpios", 0); - if (!gpio_is_valid(phy->gpio_en)) + phy->common.gpio_en = of_get_named_gpio(np, "s3fwrn5,en-gpios", 0); + if (!gpio_is_valid(phy->common.gpio_en)) return -ENODEV; } - phy->gpio_fw_wake = of_get_named_gpio(np, "wake-gpios", 0); - if (!gpio_is_valid(phy->gpio_fw_wake)) { + phy->common.gpio_fw_wake = of_get_named_gpio(np, "wake-gpios", 0); + if (!gpio_is_valid(phy->common.gpio_fw_wake)) { /* Support also deprecated property */ - phy->gpio_fw_wake = of_get_named_gpio(np, "s3fwrn5,fw-gpios", 0); - if (!gpio_is_valid(phy->gpio_fw_wake)) + phy->common.gpio_fw_wake = of_get_named_gpio(np, "s3fwrn5,fw-gpios", 0); + if (!gpio_is_valid(phy->common.gpio_fw_wake)) return -ENODEV; } @@ -226,8 +181,8 @@ static int s3fwrn5_i2c_probe(struct i2c_client *client, if (!phy) return -ENOMEM; - mutex_init(&phy->mutex); - phy->mode = S3FWRN5_MODE_COLD; + mutex_init(&phy->common.mutex); + phy->common.mode = S3FWRN5_MODE_COLD; phy->irq_skip = true; phy->i2c_dev = client; @@ -237,17 +192,17 @@ static int s3fwrn5_i2c_probe(struct i2c_client *client, if (ret < 0) return ret; - ret = devm_gpio_request_one(&phy->i2c_dev->dev, phy->gpio_en, - GPIOF_OUT_INIT_HIGH, "s3fwrn5_en"); + ret = devm_gpio_request_one(&phy->i2c_dev->dev, phy->common.gpio_en, + GPIOF_OUT_INIT_HIGH, "s3fwrn5_en"); if (ret < 0) return ret; - ret = devm_gpio_request_one(&phy->i2c_dev->dev, phy->gpio_fw_wake, - GPIOF_OUT_INIT_LOW, "s3fwrn5_fw_wake"); + ret = devm_gpio_request_one(&phy->i2c_dev->dev, phy->common.gpio_fw_wake, + GPIOF_OUT_INIT_LOW, "s3fwrn5_fw_wake"); if (ret < 0) return ret; - ret = s3fwrn5_probe(&phy->ndev, phy, &phy->i2c_dev->dev, &i2c_phy_ops); + ret = s3fwrn5_probe(&phy->common.ndev, phy, &phy->i2c_dev->dev, &i2c_phy_ops); if (ret < 0) return ret; @@ -255,7 +210,7 @@ static int s3fwrn5_i2c_probe(struct i2c_client *client, s3fwrn5_i2c_irq_thread_fn, IRQF_TRIGGER_HIGH | IRQF_ONESHOT, S3FWRN5_I2C_DRIVER_NAME, phy); if (ret) - s3fwrn5_remove(phy->ndev); + s3fwrn5_remove(phy->common.ndev); return ret; } @@ -264,7 +219,7 @@ static int s3fwrn5_i2c_remove(struct i2c_client *client) { struct s3fwrn5_i2c_phy *phy = i2c_get_clientdata(client); - s3fwrn5_remove(phy->ndev); + s3fwrn5_remove(phy->common.ndev); return 0; } diff --git a/drivers/nfc/s3fwrn5/phy_common.h b/drivers/nfc/s3fwrn5/phy_common.h new file mode 100644 index 0000000..14f7690 --- /dev/null +++ b/drivers/nfc/s3fwrn5/phy_common.h @@ -0,0 +1,86 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * + * Link Layer for Samsung S3FWRN5 NCI based Driver + * + * Copyright (C) 2015 Samsung Electrnoics + * Robert Baldyga + * Copyright (C) 2020 Samsung Electrnoics + * Bongsu Jeon + */ + +#ifndef __LOCAL_PHY_COMMON_H +#define __LOCAL_PHY_COMMON_H + +#include "s3fwrn5.h" + +#define S3FWRN5_EN_WAIT_TIME 20 + +struct phy_common { + struct nci_dev *ndev; + + int gpio_en; + int gpio_fw_wake; + + struct mutex mutex; + + enum s3fwrn5_mode mode; +}; + +static inline 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); + msleep(S3FWRN5_EN_WAIT_TIME); + mutex_unlock(&phy->mutex); +} + +static inline 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; +} + +static inline 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); +} + +static inline 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; +} + +#endif /* __LOCAL_PHY_COMMON_H_ */ -- 1.9.1