mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-20 15:26:13 +08:00
670 lines
13 KiB
C
670 lines
13 KiB
C
//-----------------------------------------------------------------------------
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// Willok, June 2018
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// Edits by Iceman, July 2018
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// The main i2c code, for communications with smart card module
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//-----------------------------------------------------------------------------
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#include "i2c.h"
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// 定义连接引脚
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#define GPIO_RST AT91C_PIO_PA1
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#define GPIO_SCL AT91C_PIO_PA5
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#define GPIO_SDA AT91C_PIO_PA7
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#define SCL_H HIGH(GPIO_SCL)
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#define SCL_L LOW(GPIO_SCL)
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#define SDA_H HIGH(GPIO_SDA)
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#define SDA_L LOW(GPIO_SDA)
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#define SCL_read (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SCL)
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#define SDA_read (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SDA)
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#define I2C_ERROR "I2C_WaitAck Error"
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volatile unsigned long c;
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// 直接使用循环来延时，一个循环 6 条指令，48M， Delay=1 大概为 200kbps
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//void I2CSpinDelayClk(uint16_t delay) ;
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void __attribute__((optimize("O0"))) I2CSpinDelayClk(uint16_t delay) {
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for (c = delay * 2; c; c--) {};
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}
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/*
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#define I2C_DELAY_1CLK I2CSpinDelayClk(1)
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#define I2C_DELAY_2CLK I2CSpinDelayClk(2)
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#define I2C_DELAY_XCLK(x) I2CSpinDelayClk((x))
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*/
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// 通讯延迟函数 ommunication delay function
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#define I2C_DELAY_1CLK I2CSpinDelayClk(1)
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#define I2C_DELAY_2CLK I2CSpinDelayClk(2)
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#define I2C_DELAY_XCLK(x) I2CSpinDelayClk((x))
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//void I2C_DELAY_1(void) { I2CSpinDelayClk(1);}
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//void I2C_DELAY_2(void) { I2CSpinDelayClk(2);}
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//void I2C_DELAY_X(uint16_t delay) { I2CSpinDelayClk(delay);}
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void I2C_init(void) {
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// 配置复位引脚，关闭上拉，推挽输出，默认高
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// Configure reset pin, close up pull up, push-pull output, default high
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AT91C_BASE_PIOA->PIO_PPUDR = GPIO_RST;
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AT91C_BASE_PIOA->PIO_MDDR = GPIO_RST;
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// 配置 I2C 引脚，开启上拉，开漏输出
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// Configure I2C pin, open up, open leakage
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AT91C_BASE_PIOA->PIO_PPUER |= (GPIO_SCL | GPIO_SDA); // 打开上拉 Open up the pull up
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AT91C_BASE_PIOA->PIO_MDER |= (GPIO_SCL | GPIO_SDA);
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// 默认三根线全部拉高
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// default three lines all pull up
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AT91C_BASE_PIOA->PIO_SODR |= (GPIO_SCL | GPIO_SDA | GPIO_RST);
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// 允许输出
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// allow output
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AT91C_BASE_PIOA->PIO_OER |= (GPIO_SCL | GPIO_SDA | GPIO_RST);
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AT91C_BASE_PIOA->PIO_PER |= (GPIO_SCL | GPIO_SDA | GPIO_RST);
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}
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// 设置复位状态
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// set the reset state
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void I2C_SetResetStatus(uint8_t LineRST, uint8_t LineSCK, uint8_t LineSDA) {
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if (LineRST)
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HIGH(GPIO_RST);
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else
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LOW(GPIO_RST);
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if (LineSCK)
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HIGH(GPIO_SCL);
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else
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LOW(GPIO_SCL);
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if (LineSDA)
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HIGH(GPIO_SDA);
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else
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LOW(GPIO_SDA);
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}
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// 复位进入主程序
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// Reset the SIM_Adapter, then enter the main program
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// Note: the SIM_Adapter will not enter the main program after power up. Please run this function before use SIM_Adapter.
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void I2C_Reset_EnterMainProgram(void) {
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I2C_SetResetStatus(0, 0, 0); // 拉低复位线
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SpinDelay(30);
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I2C_SetResetStatus(1, 0, 0); // 解除复位
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SpinDelay(30);
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I2C_SetResetStatus(1, 1, 1); // 拉高数据线
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SpinDelay(10);
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}
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// 复位进入引导模式
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// Reset the SIM_Adapter, then enter the bootloader program
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// Reserve：For firmware update.
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void I2C_Reset_EnterBootloader(void) {
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I2C_SetResetStatus(0, 1, 1); // 拉低复位线
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SpinDelay(100);
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I2C_SetResetStatus(1, 1, 1); // 解除复位
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SpinDelay(10);
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}
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// 等待时钟变高
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// Wait for the clock to go High.
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bool WaitSCL_H(void) {
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volatile uint16_t delay = 5000;
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while (delay--) {
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if (SCL_read) {
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return true;
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}
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I2C_DELAY_1CLK;
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}
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return false;
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}
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// Wait max 300ms or until SCL goes LOW.
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// Which ever comes first
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bool WaitSCL_300ms(void){
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volatile uint16_t delay = 300;
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while ( delay-- ) {
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if (!SCL_read)
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return true;
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SpinDelay(1);
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}
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return (delay == 0);
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}
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bool I2C_Start(void) {
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I2C_DELAY_XCLK(4);
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SDA_H;
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I2C_DELAY_1CLK;
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SCL_H;
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if (!WaitSCL_H()) return false;
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I2C_DELAY_2CLK;
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if (!SCL_read) return false;
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if (!SDA_read) return false;
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SDA_L; I2C_DELAY_2CLK;
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return true;
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}
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// send i2c STOP
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void I2C_Stop(void) {
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SCL_L; I2C_DELAY_2CLK;
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SDA_L; I2C_DELAY_2CLK;
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SCL_H; I2C_DELAY_2CLK;
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SDA_H;
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I2C_DELAY_2CLK;
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I2C_DELAY_2CLK;
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I2C_DELAY_2CLK;
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I2C_DELAY_2CLK;
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}
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// Send i2c ACK
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void I2C_Ack(void) {
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SCL_L; I2C_DELAY_2CLK;
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SDA_L; I2C_DELAY_2CLK;
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SCL_H; I2C_DELAY_2CLK;
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SCL_L; I2C_DELAY_2CLK;
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}
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// Send i2c NACK
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void I2C_NoAck(void) {
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SCL_L; I2C_DELAY_2CLK;
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SDA_H; I2C_DELAY_2CLK;
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SCL_H; I2C_DELAY_2CLK;
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SCL_L; I2C_DELAY_2CLK;
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}
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bool I2C_WaitAck(void) {
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SCL_L; I2C_DELAY_1CLK;
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SDA_H; I2C_DELAY_1CLK;
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SCL_H;
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if (!WaitSCL_H())
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return false;
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I2C_DELAY_2CLK;
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if (SDA_read) {
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SCL_L;
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return false;
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}
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SCL_L;
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return true;
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}
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void I2C_SendByte(uint8_t data) {
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uint8_t i = 8;
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while (i--) {
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SCL_L; I2C_DELAY_1CLK;
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if (data & 0x80)
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SDA_H;
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else
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SDA_L;
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data <<= 1;
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I2C_DELAY_1CLK;
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SCL_H;
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if (!WaitSCL_H())
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return;
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I2C_DELAY_2CLK;
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}
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SCL_L;
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}
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uint8_t I2C_ReadByte(void) {
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uint8_t i = 8, b = 0;
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SDA_H;
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while (i--) {
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b <<= 1;
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SCL_L; I2C_DELAY_2CLK;
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SCL_H;
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if (!WaitSCL_H())
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return 0;
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I2C_DELAY_2CLK;
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if (SDA_read)
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b |= 0x01;
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}
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SCL_L;
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return b;
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}
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// Sends one byte ( command to be written, slavedevice address)
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bool I2C_WriteCmd(uint8_t device_cmd, uint8_t device_address) {
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bool bBreak = true;
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do {
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if (!I2C_Start())
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return false;
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I2C_SendByte(device_address & 0xFE);
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if (!I2C_WaitAck())
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break;
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I2C_SendByte(device_cmd);
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if (!I2C_WaitAck())
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break;
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bBreak = false;
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} while (false);
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I2C_Stop();
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if (bBreak) {
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if ( MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
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return false;
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}
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return true;
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}
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// 写入1字节数据 （待写入数据，待写入地址，器件类型）
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// Sends 1 byte data (Data to be written,command to be written , SlaveDevice address ).
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bool I2C_WriteByte(uint8_t data, uint8_t device_cmd, uint8_t device_address) {
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bool bBreak = true;
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do {
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if (!I2C_Start())
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return false;
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I2C_SendByte(device_address & 0xFE);
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if (!I2C_WaitAck())
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break;
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I2C_SendByte(device_cmd);
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if (!I2C_WaitAck())
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break;
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I2C_SendByte(data);
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if (!I2C_WaitAck())
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break;
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bBreak = false;
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} while (false);
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I2C_Stop();
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if (bBreak) {
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if ( MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
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return false;
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}
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return true;
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}
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// 写入1串数据（待写入数组地址，待写入长度，待写入地址，器件类型）
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//Sends a string of data (Array address, length, command to be written , SlaveDevice address ).
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// len = uint8 (max buffer to write 256bytes)
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bool I2C_BufferWrite(uint8_t *data, uint8_t len, uint8_t device_cmd, uint8_t device_address) {
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bool bBreak = true;
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do {
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if (!I2C_Start())
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return false;
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I2C_SendByte(device_address & 0xFE);
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if (!I2C_WaitAck())
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break;
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I2C_SendByte(device_cmd);
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if (!I2C_WaitAck())
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break;
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while (len) {
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I2C_SendByte(*data);
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if (!I2C_WaitAck())
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break;
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len--;
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data++;
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}
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if (len == 0)
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bBreak = false;
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} while (false);
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I2C_Stop();
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if (bBreak) {
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if ( MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
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return false;
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}
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return true;
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}
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// 读出1串数据（存放读出数据，待读出长度，带读出地址，器件类型）
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// read 1 strings of data (Data storage array, Readout length, command to be written , SlaveDevice address ).
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// len = uint8 (max buffer to read 256bytes)
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uint8_t I2C_BufferRead(uint8_t *data, uint8_t len, uint8_t device_cmd, uint8_t device_address) {
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bool bBreak = true;
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uint8_t readcount = 0;
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// sending
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do {
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if (!I2C_Start())
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return 0;
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// 0xB0 or 0xC0 i2c write
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I2C_SendByte(device_address & 0xFE);
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if (!I2C_WaitAck())
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break;
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I2C_SendByte(device_cmd);
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if (!I2C_WaitAck())
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break;
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// 0xB1 or 0xC1 read
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I2C_Start();
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I2C_SendByte(device_address | 1);
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if (!I2C_WaitAck())
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break;
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bBreak = false;
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} while (false);
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if (bBreak) {
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I2C_Stop();
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if ( MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
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return 0;
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}
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// reading
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while (len) {
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len--;
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*data = I2C_ReadByte();
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// 读取的第一个字节为后续长度
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// The first byte read is the message length
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if (!readcount && (len > *data))
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len = *data;
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if (len == 0)
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I2C_NoAck();
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else
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I2C_Ack();
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data++;
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readcount++;
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}
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I2C_Stop();
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return readcount;
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}
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uint8_t I2C_ReadFW(uint8_t *data, uint8_t len, uint8_t msb, uint8_t lsb, uint8_t device_address) {
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//START, 0xB0, 0x00, 0x00, START, 0xB1, xx, yy, zz, ......, STOP
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bool bBreak = true;
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uint8_t readcount = 0;
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// sending
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do {
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if (!I2C_Start())
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return 0;
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// 0xB0 or 0xC0 i2c write
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I2C_SendByte(device_address & 0xFE);
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if (!I2C_WaitAck())
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break;
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// msb
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I2C_SendByte(msb);
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if (!I2C_WaitAck())
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break;
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// lsb
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I2C_SendByte(lsb);
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if (!I2C_WaitAck())
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break;
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// 0xB1 or 0xC1 read
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I2C_Start();
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I2C_SendByte(device_address | 1);
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if (!I2C_WaitAck())
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break;
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bBreak = false;
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} while (false);
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if (bBreak) {
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I2C_Stop();
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if ( MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
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return 0;
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}
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// reading
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while (len) {
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len--;
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*data = I2C_ReadByte();
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if (len == 0)
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I2C_NoAck();
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else
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I2C_Ack();
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data++;
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readcount++;
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}
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I2C_Stop();
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return readcount;
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}
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bool I2C_WriteFW(uint8_t *data, uint8_t len, uint8_t msb, uint8_t lsb, uint8_t device_address) {
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//START, 0xB0, 0x00, 0x00, xx, yy, zz, ......, STOP
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bool bBreak = true;
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do {
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if (!I2C_Start())
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return false;
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// 0xB0
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I2C_SendByte(device_address & 0xFE);
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if (!I2C_WaitAck())
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break;
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// msb
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I2C_SendByte(msb);
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if (!I2C_WaitAck())
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break;
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// lsb
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I2C_SendByte(lsb);
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if (!I2C_WaitAck())
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break;
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while (len) {
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I2C_SendByte(*data);
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if (!I2C_WaitAck())
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break;
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len--;
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data++;
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}
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if (len == 0)
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bBreak = false;
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} while (false);
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I2C_Stop();
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if (bBreak) {
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if ( MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
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return false;
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}
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return true;
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}
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void I2C_print_status(void) {
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I2C_init();
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I2C_Reset_EnterMainProgram();
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uint8_t resp[4] = {0};
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uint8_t len = I2C_BufferRead(resp, 4, I2C_DEVICE_CMD_GETVERSION, I2C_DEVICE_ADDRESS_MAIN);
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DbpString("Smart card module (ISO 7816)");
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if ( len )
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Dbprintf(" FW version................v%x.%02x", resp[1], resp[2]);
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else
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DbpString(" FW version................FAILED");
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}
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#define WAIT_UNTIL_SCL_GOES_HIGH { while (!SCL_read) { SpinDelay(1); } }
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bool GetATR(smart_card_atr_t *card_ptr) {
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if ( card_ptr ) {
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card_ptr->atr_len = 0;
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memset(card_ptr->atr, 0, sizeof(card_ptr->atr));
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}
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if ( MF_DBGLEVEL > 3 ) DbpString("before sending GET_ATR");
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// Send ATR
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// start [C0 01] stop
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I2C_WriteCmd(I2C_DEVICE_CMD_GENERATE_ATR, I2C_DEVICE_ADDRESS_MAIN);
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||
// variable delay here.
|
||
if (!WaitSCL_300ms()) {
|
||
if ( MF_DBGLEVEL > 3 ) DbpString(" 300ms SCL delay failed");
|
||
return false;
|
||
}
|
||
|
||
// 8051 speaks with smart card.
|
||
WAIT_UNTIL_SCL_GOES_HIGH;
|
||
|
||
if ( MF_DBGLEVEL > 3 ) DbpString("before reading");
|
||
|
||
// start [C0 03 start C1 len aa bb cc stop]
|
||
uint8_t len = I2C_BufferRead(card_ptr->atr, sizeof(card_ptr->atr), I2C_DEVICE_CMD_READ, I2C_DEVICE_ADDRESS_MAIN);
|
||
|
||
// remove length byte from the read bytes.
|
||
if ( card_ptr )
|
||
card_ptr->atr_len = len - 1;
|
||
|
||
return true;
|
||
}
|
||
|
||
void SmartCardAtr(void) {
|
||
|
||
smart_card_atr_t card;
|
||
|
||
I2C_Reset_EnterMainProgram();
|
||
|
||
bool isOK = GetATR( &card );
|
||
if ( isOK )
|
||
Dbhexdump(card.atr_len, card.atr, false);
|
||
|
||
cmd_send(CMD_ACK, isOK, sizeof(smart_card_atr_t), 0, &card, sizeof(smart_card_atr_t));
|
||
}
|
||
|
||
void SmartCardRaw( uint64_t arg0, uint64_t arg1, uint8_t *data ) {
|
||
#define ISO7618_MAX_FRAME 255
|
||
I2C_Reset_EnterMainProgram();
|
||
|
||
uint8_t len = 0;
|
||
uint8_t *resp = BigBuf_malloc(ISO7618_MAX_FRAME);
|
||
|
||
smart_card_atr_t card;
|
||
|
||
bool isOK = GetATR( &card );
|
||
if ( !isOK )
|
||
goto out;
|
||
|
||
// Send raw bytes
|
||
// start [C0 02] A0 A4 00 00 02 stop
|
||
// asBytes = A0 A4 00 00 02
|
||
// arg0 = len 5
|
||
I2C_BufferWrite(data, arg1, I2C_DEVICE_CMD_SEND, I2C_DEVICE_ADDRESS_MAIN);
|
||
|
||
// read response
|
||
// start [C0 03 start C1 len aa bb cc stop]
|
||
len = I2C_BufferRead(resp, ISO7618_MAX_FRAME, I2C_DEVICE_CMD_READ, I2C_DEVICE_ADDRESS_MAIN);
|
||
|
||
out:
|
||
cmd_send(CMD_ACK, isOK, len, 0, resp, len);
|
||
}
|
||
|
||
void SmartCardUpgrade(uint64_t arg0) {
|
||
#define I2C_BLOCK_SIZE 128
|
||
// write. Sector0, with 11,22,33,44
|
||
// erase is 128bytes, and takes 50ms to execute
|
||
|
||
I2C_Reset_EnterBootloader();
|
||
|
||
bool isOK = true;
|
||
uint8_t res = 0;
|
||
uint16_t length = arg0;
|
||
uint16_t pos = 0;
|
||
uint8_t *fwdata = BigBuf_get_addr();
|
||
uint8_t *verfiydata = BigBuf_malloc(I2C_BLOCK_SIZE);
|
||
|
||
while (length) {
|
||
|
||
uint8_t msb = (pos >> 8) & 0xFF;
|
||
uint8_t lsb = pos & 0xFF;
|
||
|
||
Dbprintf("FW %02X %02X", msb, lsb);
|
||
|
||
size_t size = MIN(I2C_BLOCK_SIZE, length);
|
||
|
||
// write
|
||
res = I2C_WriteFW(fwdata+pos, size, msb, lsb, I2C_DEVICE_ADDRESS_BOOT);
|
||
if ( !res ) {
|
||
Dbprintf("Writing failed");
|
||
isOK = false;
|
||
break;
|
||
}
|
||
|
||
// writing takes time.
|
||
SpinDelay(50);
|
||
|
||
// read
|
||
res = I2C_ReadFW(verfiydata, size, msb, lsb, I2C_DEVICE_ADDRESS_BOOT);
|
||
if ( res == 0) {
|
||
Dbprintf("Reading back failed");
|
||
isOK = false;
|
||
break;
|
||
}
|
||
|
||
// cmp
|
||
if ( 0 != memcmp(fwdata+pos, verfiydata, size)) {
|
||
Dbprintf("not equal data");
|
||
isOK = false;
|
||
break;
|
||
}
|
||
|
||
length -= size;
|
||
pos += size;
|
||
}
|
||
cmd_send(CMD_ACK, isOK, pos, 0, 0, 0);
|
||
}
|
||
|
||
void SmartCardSetBaud(uint64_t arg0) {
|
||
I2C_Reset_EnterMainProgram();
|
||
|
||
bool isOK = true;
|
||
//uint16_t baud = arg0;
|
||
// Send SET BAUD
|
||
// start [C0 04] stop
|
||
//I2C_WriteByte(0x00, I2C_DEVICE_CMD_SETBAUD, I2C_DEVICE_ADDRESS_MAIN);
|
||
|
||
cmd_send(CMD_ACK, isOK, 0, 0, 0, 0);
|
||
}
|
||
|
||
void SmartCardSetClock(uint64_t arg0) {
|
||
|
||
I2C_Reset_EnterMainProgram();
|
||
|
||
bool isOK = true;
|
||
//uint16_t clockrate = arg0;
|
||
// Send SIM CLC
|
||
// start [C0 04] stop
|
||
//I2C_WriteByte(0x00, I2C_DEVICE_CMD_SIM_CLC, I2C_DEVICE_ADDRESS_MAIN);
|
||
|
||
cmd_send(CMD_ACK, isOK, 0, 0, 0, 0);
|
||
} |