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/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*/
#ifndef __NFC_NCI_H
#define __NFC_NCI_H
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/version.h>
#include <linux/semaphore.h>
#include <linux/completion.h>
#include <linux/ioctl.h>
#include <linux/cdev.h>
#include <linux/miscdevice.h>
struct nfc_device {
struct cdev cdev;
struct class *char_class;
};
enum ehandler_mode {
UNSOLICITED_MODE = 0,
SOLICITED_MODE,
UNSOLICITED_FTM_RAW_MODE,
SOLICITED_FTM_RAW_MODE
};
enum ekernel_logging_mode {
LEVEL_0 = 0, /* For Basic Comms, such asNCI TX/TX to NFCC */
LEVEL_1, /* Other Debug e.g. Notifications, ISR hit, etc ..*/
LEVEL_2,
LEVEL_3,
LEVEL_4,
LEVEL_5
};
struct devicemode {
enum ehandler_mode handle_flavour;
} tdevicemode;
#define NFC_DRIVER_NAME "nfc-nci"
#define NFC_I2C_DRIVER_NAME "NCI NFC I2C Interface",
#define NCI_I2C_SLAVE (0x2C)
#define NFC_I2C_BUS 3 /* 6, 10, 4, 5 */
#define NFC_SET_PWR _IOW(0xE9, 0x01, unsigned int)
#define NFCC_MODE _IOW(0xE9, 0x02, unsigned int)
#define NFC_KERNEL_LOGGING_MODE _IOW(0xE9, 0x03, unsigned int)
#define SET_RX_BLOCK _IOW(0xE9, 0x04, unsigned int)
#define SET_EMULATOR_TEST_POINT _IOW(0xE9, 0x05, unsigned int)
#define NFCC_VERSION _IOW(0xE9, 0x08, unsigned int)
#define NFC_GET_EFUSE _IOW(0xE9, 0x09, unsigned int)
#define NFCC_INITIAL_CORE_RESET_NTF _IOW(0xE9, 0x10, unsigned int)
#define NFC_MAX_I2C_TRANSFER (0x0400)
#define NFC_MSG_MAX_SIZE (0x21)
#define NFC_RX_BUFFER_CNT_START (0x0)
#define NFC_RX_BUFFER_BLOCK_SIZE (0x120) /* Bytes per Block */
#define NFC_RX_BUFFER_PAGE_SIZE (0x1000) /* Page size Bytes */
#define NFC_RX_BUFFER_PAGES (0x8)
#define NFC_RX_ORDER_FREE_PAGES (0x3) /* Free 8 Pages */
/* The total no. of Blocks */
#define NFC_RX_BUFFER_CNT_LIMIT (unsigned short)( \
( \
((NFC_RX_BUFFER_PAGE_SIZE) *\
(NFC_RX_BUFFER_PAGES))/\
(NFC_RX_BUFFER_BLOCK_SIZE)\
) \
) \
#define PAYLOAD_HEADER_LENGTH (0x3)
#define PAYLOAD_LENGTH_MAX (256)
#define BYTE (0x8)
#define NCI_IDENTIFIER (0x10)
/** Power Management Related **/
#define NFCC_WAKE (0x01)
#define NFCC_SLEEP (0x00)
#define XTAL_CLOCK (0X00)
#define REFERENCE_CLOCK (0X01)
/* LDO Trim Settings */
#define IPTAT_TRIM (0x1F)
#define V1P1_TRIM (0x0F)
#define V1P8_TRIM (0x0F)
#define VBATT_OK_THRESHOLD (0x07)
#define PWR_EN (0x08) /* Enable 1.1V LDO Regulator */
#define LS_EN (0x04) /* Enable 1.1V->1.8V Level Shifters */
/* Write '1' to cause wake event to NFCC. If set NFCC will not go to SLEEP */
#define NCI_WAKE (0x02)
#define NCI_ENA (0x01) /* Write '1' to enable PLL */
#define FREQ_SEL (0x00) /* XO Frequency Select */
#define FREQ_SEL_13 (0x00) /* XO Frequency Select = 13.56MHz */
#define FREQ_SEL_19 (0x01) /* XO Frequency Select = 19.20 MHz */
#define FREQ_SEL_26 (0x02) /* XO Frequency Select = 26.00 MHz */
#define FREQ_SEL_27 (0x03) /* XO Frequency Select = 27.12 MHz */
#define FREQ_SEL_37 (0x04) /* XO Frequency Select = 37.40 MHz */
#define FREQ_SEL_38 (0x05) /* XO Frequency Select = 38.40 MHz */
#define FREQ_SEL_40 (0x06) /* XO Frequency Select = 40.00 MHz */
#define FREQ_SEL_48 (0x07) /* XO Frequency Select = 48.00 MHz */
#define FREQ_SEL_27 (0x03) /* XO Frequency Select */
#define QUALIFY_REFCLK (0x80)
#define QUALIFY_OSC (0x40)
#define LOCALBIASXTAL (0x20)
#define BIAS2X_FORCE (0x10)
#define BIAS2X (0x08)
#define LBIAS2X (0x04)
#define SMALLRF (0x02)
#define SMALLRBIAS (0x01)
/* Select as appropriate */
#define CRYSTAL_OSC ((QUALIFY_REFCLK) | (QUALIFY_OSC) | \
(LOCALBIASXTAL) | (BIAS2X_FORCE) | \
(BIAS2X) | (LBIAS2X) | (SMALLRF) | (SMALLRBIAS))
#define CDACIN (0x3F) /* Tuning range for load capacitor at X1*/
#define CDACOUT (0x3F) /* Tuning range for load capacitor at X2*/
#define RAW(reg, value) (raw_##reg[1] = value)
/* Logging macro with threshold control */
#define PRINTK(LEVEL, THRESHOLD, pString, ...) ( \
if (LEVEL > THRESHOLD) { \
pr_info(pString, ##__VA_ARGS__); \
} \
)
/* board config */
struct nfc_platform_data {
int (*request_resources) (struct i2c_client *client);
void (*free_resources) (void);
void (*enable) (int fw);
int (*test) (void);
void (*disable) (void);
};
/*
* Internal NFCC Hardware states. At present these may not be possible to
* detect in software as possibly no power when
* in monitor state! Also, need to detect DISABLE control GPIO from PMIC.
*/
enum nfcc_hardware_state {
NFCC_STATE_MONITOR, /* VBAT < h/w Critcal Voltage */
/* VBAT > H/W Critical Voltage;
Lowest Power Mode - DISABLE = 1; only
possible when phone is ON */
NFCC_STATE_HPD,
/* VBAT > H/W Critical Voltage; DISABLE = 0;
Only possible when phone is ON */
NFCC_STSTE_ULPM,
/* VBAT > H/W Critical Voltage; DISABLE = 0;
Powered by PMIC & VBAT; 1.8V I/O supply on; VDDPX available, boot is
initiated by host over I2C */
NFCC_STATE_NORMAL_REGION1,
/* VBAT > H/W Critical Voltage; DISABLE = 0;
Powered by VBAT; 1.8V I/O supply on; VDDPX available, boot is initiated
by host over I2C */
NFCC_STATE_NORMAL_REGION2,
};
/* We assume here that VBATT > h/w Critical Voltage */
enum nfcc_state {
/* Assume In ULPM state, ready for initialisation, cannot detect for
Monitor or HPD states */
NFCC_STATE_COLD,
/* (VDDPX==1) && (Following I2C initialisation). In Region 1 or Region2
state WAKE */
NFCC_STATE_NORMAL_WAKE,
/* (VDDPX==1) && (Following I2C initialisation). In Region 1 or Region2
state SLEEP */
NFCC_STATE_NORMAL_SLEEP,
};
enum nfcc_irq {
NFCC_NO_INT,
NFCC_INT,
};
enum nfcc_initial_core_reset_ntf {
TIMEDOUT_INITIAL_CORE_RESET_NTF = 0, /* 0*/
ARRIVED_INITIAL_CORE_RESET_NTF, /* 1 */
DEFAULT_INITIAL_CORE_RESET_NTF, /*2*/
};
struct nfc_info {
struct miscdevice miscdev;
struct i2c_client *i2c_dev;
struct regulator_bulk_data regs[3];
enum nfcc_state state;
wait_queue_head_t read_wait;
loff_t read_offset;
struct mutex read_mutex;
struct mutex mutex;
u8 *buf;
size_t buflen;
spinlock_t irq_enabled_lock;
unsigned int count_irq;
enum nfcc_irq read_irq;
};
struct nfc_i2c_platform_data {
unsigned int nfc_irq_gpio;
unsigned int nfc_clk_en_gpio;
unsigned int dis_gpio;
unsigned int irq_gpio;
unsigned int ven_gpio;
unsigned int firm_gpio;
unsigned int reg;
};
#endif
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