drivers/nfc/s3fwrn5/phy_common.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Link Layer for Samsung S3FWRN5 NCI based Driver
   4  *
   5  * Copyright (C) 2015 Samsung Electrnoics
   6  * Robert Baldyga <r.baldyga@samsung.com>
   7  * Copyright (C) 2020 Samsung Electrnoics
   8  * Bongsu Jeon <bongsu.jeon@samsung.com>
   9  */
  10
  11 #include <linux/gpio.h>
  12 #include <linux/delay.h>
  13 #include <linux/module.h>
  14
  15 #include "phy_common.h"
  16
  17 void s3fwrn5_phy_set_wake(void *phy_id, bool wake)
  18 {
  19         struct phy_common *phy = phy_id;
  20
  21         mutex_lock(&phy->mutex);
  22         gpio_set_value(phy->gpio_fw_wake, wake);
  23         if (wake)
  24                 msleep(S3FWRN5_EN_WAIT_TIME);
  25         mutex_unlock(&phy->mutex);
  26 }
  27 EXPORT_SYMBOL(s3fwrn5_phy_set_wake);
  28
  29 bool s3fwrn5_phy_power_ctrl(struct phy_common *phy, enum s3fwrn5_mode mode)
  30 {
  31         if (phy->mode == mode)
  32                 return false;
  33
  34         phy->mode = mode;
  35
  36         gpio_set_value(phy->gpio_en, 1);
  37         gpio_set_value(phy->gpio_fw_wake, 0);
  38         if (mode == S3FWRN5_MODE_FW)
  39                 gpio_set_value(phy->gpio_fw_wake, 1);
  40
  41         if (mode != S3FWRN5_MODE_COLD) {
  42                 msleep(S3FWRN5_EN_WAIT_TIME);
  43                 gpio_set_value(phy->gpio_en, 0);
  44                 msleep(S3FWRN5_EN_WAIT_TIME);
  45         }
  46
  47         return true;
  48 }
  49 EXPORT_SYMBOL(s3fwrn5_phy_power_ctrl);
  50
  51 void s3fwrn5_phy_set_mode(void *phy_id, enum s3fwrn5_mode mode)
  52 {
  53         struct phy_common *phy = phy_id;
  54
  55         mutex_lock(&phy->mutex);
  56
  57         s3fwrn5_phy_power_ctrl(phy, mode);
  58
  59         mutex_unlock(&phy->mutex);
  60 }
  61 EXPORT_SYMBOL(s3fwrn5_phy_set_mode);
  62
  63 enum s3fwrn5_mode s3fwrn5_phy_get_mode(void *phy_id)
  64 {
  65         struct phy_common *phy = phy_id;
  66         enum s3fwrn5_mode mode;
  67
  68         mutex_lock(&phy->mutex);
  69
  70         mode = phy->mode;
  71
  72         mutex_unlock(&phy->mutex);
  73
  74         return mode;
  75 }
  76 EXPORT_SYMBOL(s3fwrn5_phy_get_mode);