/****************************************************************************** * Copyright (C) 2019-2020 NXP * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * ******************************************************************************/ #ifndef _COMMON_H_ #define _COMMON_H_ #include #include #include #include #include #include #include #include #include "i2c_drv.h" #define DEV_COUNT 1 /* Max device count for this driver */ #define CLASS_NAME "nfc" /* i2c device class */ // NFC character device name, this will be in /dev/ #define NFC_CHAR_DEV_NAME "pn553" // NCI packet details #define NCI_MSG_CMD 0x20 #define NCI_MSG_RSP 0x40 #define NCI_HDR_LEN 3 #define NCI_PAYLOAD_IDX 3 #define NCI_PAYLOAD_LEN_IDX 2 // FW DNLD packet details #define FW_HDR_LEN 2 #define FW_PAYLOAD_LEN_IDX 1 #define FW_CRC_LEN 2 #define MIN_NFC_DL_FRAME_SIZE 3 #define NCI_RESET_CMD_LEN (4) #define NCI_RESET_RSP_LEN (4) #define NCI_RESET_NTF_LEN (13) #define DL_GET_VERSION_CMD_LEN (8) #define DL_GET_VERSION_RSP_LEN_1 (12) #define DL_GET_VERSION_RSP_LEN_2 (20) #define DL_RESET_CMD_LEN (8) #define DL_GET_SESSION_STATE_CMD_LEN (8) #define DL_GET_SESSION_STATE_RSP_LEN (8) #define GET_SESSION_STS_OFF (3) #define NFCC_SESSION_STS_CLOSED (0x0) #define MAX_NCI_PAYLOAD_LEN (255) #define MAX_BUFFER_SIZE (NCI_HDR_LEN + MAX_NCI_PAYLOAD_LEN) #define MAX_DL_PAYLOAD_LEN (550) #define MAX_DL_BUFFER_SIZE (FW_HDR_LEN + FW_CRC_LEN + MAX_DL_PAYLOAD_LEN) // Maximum retry count for standby writes #define MAX_RETRY_COUNT (3) // Retry count for normal write #define NO_RETRY (1) #define MAX_IRQ_WAIT_TIME (90) #define WAKEUP_SRC_TIMEOUT (2000) /*command response timeout*/ #define NCI_CMD_RSP_TIMEOUT (2000) //2s #define NFC_MAGIC 0xE9 /*Ioctls*/ // The type should be aligned with MW HAL definitions #define NFC_SET_PWR _IOW(NFC_MAGIC, 0x01, long) #define ESE_SET_PWR _IOW(NFC_MAGIC, 0x02, long) #define ESE_GET_PWR _IOR(NFC_MAGIC, 0x03, long) #define NFC_GET_PLATFORM_TYPE _IO(NFC_MAGIC, 0x04) #define NFC_GET_NFC_STATE _IO(NFC_MAGIC, 0x05) /* NFC HAL can call this ioctl to get the current IRQ state */ #define NFC_GET_IRQ_STATE _IOW(NFC_MAGIC, 0x06, long) #define DTS_IRQ_GPIO_STR "nxp,pn544-irq" #define DTS_VEN_GPIO_STR "nxp,pn544-ven" #define DTS_FWDN_GPIO_STR "nxp,pn544-fw-dwnld" enum nfcc_ioctl_request { /* NFC disable request with VEN LOW */ NFC_POWER_OFF = 0, /* NFC enable request with VEN Toggle */ NFC_POWER_ON, /* firmware download request with VEN Toggle */ NFC_FW_DWL_VEN_TOGGLE, /* ISO reset request */ NFC_ISO_RESET, /* request for firmware download gpio HIGH */ NFC_FW_DWL_HIGH, /* VEN hard reset request */ NFC_VEN_FORCED_HARD_RESET, /* request for firmware download gpio LOW */ NFC_FW_DWL_LOW, }; /*nfc platform interface type*/ enum interface_flags { /*I2C physical IF for NFCC */ PLATFORM_IF_I2C = 0, }; /*nfc state flags*/ enum nfc_state_flags { /*nfc in unknown state */ NFC_STATE_UNKNOWN = 0, /*nfc in download mode */ NFC_STATE_FW_DWL = 0x1, /*nfc booted in NCI mode */ NFC_STATE_NCI = 0x2, /*nfc booted in Fw teared mode */ NFC_STATE_FW_TEARED = 0x4, }; /* * Power state for IBI handing, mainly needed to defer the IBI handling * for the IBI received in suspend state to do it later in resume call */ enum pm_state_flags { PM_STATE_NORMAL = 0, PM_STATE_SUSPEND, PM_STATE_IBI_BEFORE_RESUME, }; /* Enum for GPIO values*/ enum gpio_values { GPIO_INPUT = 0x0, GPIO_OUTPUT = 0x1, GPIO_HIGH = 0x2, GPIO_OUTPUT_HIGH = 0x3, GPIO_IRQ = 0x4, }; // NFC GPIO variables typedef struct platform_gpio { unsigned int irq; unsigned int ven; unsigned int dwl_req; } platform_gpio_t; //cold reset Features specific Parameters typedef struct cold_reset { bool rsp_pending; /*cmd rsp pending status */ bool in_progress; /*for cold reset when gurad timer in progress */ bool reset_protection; /*reset protection enabled/disabled */ uint8_t status; /*status from response buffer */ uint8_t rst_prot_src; /*reset protection source (SPI, NFC) */ struct mutex sync_mutex; struct timer_list timer; wait_queue_head_t read_wq; } cold_reset_t; /* Device specific structure */ typedef struct nfc_dev { wait_queue_head_t read_wq; struct mutex read_mutex; struct mutex ese_access_mutex; struct mutex dev_ref_mutex; unsigned int dev_ref_count; struct class *nfc_class; struct device *nfc_device; struct cdev c_dev; dev_t devno; /* Interface flag */ uint8_t interface; /* nfc state flags */ uint8_t nfc_state; /* NFC VEN pin state */ bool nfc_ven_enabled; union { i2c_dev_t i2c_dev; }; platform_gpio_t gpio; cold_reset_t cold_reset; /*funtion pointers for the common i2c functionality */ int (*nfc_read) (struct nfc_dev *dev, char *buf, size_t count); int (*nfc_write) (struct nfc_dev *dev, const char *buf, const size_t count, int max_retry_cnt); int (*nfc_enable_intr) (struct nfc_dev *dev); int (*nfc_disable_intr) (struct nfc_dev *dev); int (*nfc_flush_readq) (struct nfc_dev *dev); } nfc_dev_t; int nfc_dev_open(struct inode *inode, struct file *filp); int nfc_dev_close(struct inode *inode, struct file *filp); long nfc_dev_ioctl(struct file *pfile, unsigned int cmd, unsigned long arg); int nfc_parse_dt(struct device *dev, platform_gpio_t *nfc_gpio, uint8_t interface); int nfc_misc_register(nfc_dev_t *nfc_dev, const struct file_operations *nfc_fops, int count, char *devname, char *classname); void nfc_misc_unregister(nfc_dev_t *nfc_dev, int count); int configure_gpio(unsigned int gpio, int flag); void gpio_set_ven(nfc_dev_t *nfc_dev, int value); void gpio_free_all(nfc_dev_t *nfc_dev); int validate_nfc_state_nci(nfc_dev_t *nfc_dev); #endif //_COMMON_H_