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#include "legato.h"
#include "interfaces.h"
#include "xmodem.h"
#include "util.h"
#include <sys/mman.h>
#define MTK7697_BAUD 115200
#define MTK7697_BAUDX 115200 * 8
static const char* SERIAL_PORT_PATH = "/dev/ttyHS0";
static const char* LDR_BIN_PATH = "/home/root/mtfiles/mt7697_bootloader.bin";
static const char* N9_BIN_PATH =
"/home/root/mtfiles/WIFI_RAM_CODE_MT76X7_in_flash.bin";
static const char* CM4_BIN_PATH = "/home/root/mtfiles/ble_smart_connect.bin";
static const char* DA_PATH = "/home/root/mtfiles/da97.bin";
typedef enum { LDR = 1, N9 = 3, CM4 = 2 } MtkMemorySegment;
typedef struct {
int serialPort;
int errorCount;
int cCount;
int retry;
int startTime;
} FlashState;
FlashState state = {0, 0, 0, 0};
uint8_t _inbyte(unsigned short timeout) {
uint8_t x;
if (read(state.serialPort, &x, 1) != 1)
return -1;
LE_INFO("in: %c", x);
return x;
}
void _outbyte(uint8_t c) {
LE_INFO("out: %c", c);
write(state.serialPort, &c, 1);
}
int xmodemSendFile(const char* filename) {
int fd = open(filename, O_RDONLY);
struct stat buf;
if (fstat(fd, &buf) != 0) {
return -1;
}
unsigned char* file = mmap(NULL, buf.st_size, PROT_READ, MAP_SHARED, fd, 0);
int r = xmodemTransmit(file, buf.st_size);
close(fd);
return r;
}
void configureSerialPort(FlashState* s, int baud) {
close(s->serialPort);
s->serialPort = fd_openSerial(SERIAL_PORT_PATH, baud);
}
bool flashDa(FlashState* s) {
configureSerialPort(&state, MTK7697_BAUD);
LE_INFO("Sending DA over xmodem");
int r = xmodemSendFile(DA_PATH);
LE_INFO("DA bytes sent: %d", r);
return r;
}
void putIntoBootloader() {
// make sure the bootstrap pin is on
mtBootstrap_Activate();
// reset state && wait
mtRst_Deactivate();
sleep(1);
// pull out of reset
mtRst_Activate();
}
void retryInitSequence(FlashState* s) {
s->retry++;
s->cCount = 0;
s->errorCount = 0;
s->startTime = util_getUnixDatetime();
putIntoBootloader();
configureSerialPort(s, MTK7697_BAUD);
}
bool verifyInitSequence(FlashState* s) {
uint8_t data;
bool initDone = false;
s->startTime = util_getUnixDatetime();
while (!initDone) {
data = fd_getChar(s->serialPort);
fd_flush(s->serialPort);
if (data == 'C') {
s->cCount++;
LE_INFO("Got a C");
} else if (data != 0) {
s->errorCount++;
LE_INFO("Got an error");
}
if (s->cCount > 1) {
initDone = true;
LE_INFO("Init done");
break;
}
if (s->errorCount > 3 || (util_getUnixDatetime() - s->startTime > 3)) {
LE_INFO("Retrying...");
retryInitSequence(s);
}
if (s->retry > 3) {
LE_INFO("Aborting");
break;
}
}
return initDone;
}
bool flashBinary(FlashState* s, MtkMemorySegment segment, const char* binPath) {
putIntoBootloader();
configureSerialPort(s, MTK7697_BAUD);
bool init = verifyInitSequence(s);
LE_INFO("Init verified: %d", init);
flashDa(s);
configureSerialPort(s, MTK7697_BAUDX);
sleep(1);
bool initDone = false;
int data = '0';
switch (segment) {
case LDR:
fd_puts(s->serialPort, "1\r");
break;
case N9:
fd_puts(s->serialPort, "3\r");
break;
case CM4:
fd_puts(s->serialPort, "2\r");
break;
}
while (!initDone) {
LE_INFO("here %c", data);
data = fd_getChar(s->serialPort);
if (data == 'C') {
initDone = true;
break;
}
}
fd_flush(s->serialPort);
LE_INFO("Sending %s over xmodem", binPath);
// this returns how much data was sent,
// so for now check that it's over 0
bool r = xmodemSendFile(binPath) > 0;
LE_INFO("%s success: %d", binPath, r);
sleep(1);
fd_puts(s->serialPort, "C\r");
fd_flush(s->serialPort);
return true;
}
bool flashLdr(FlashState* s) {
LE_INFO("Flashing LDR segment");
return flashBinary(s, LDR, LDR_BIN_PATH);
}
bool flashN9(FlashState* s) {
LE_INFO("Flashing N9 segment");
return flashBinary(s, N9, N9_BIN_PATH);
}
bool flashCm4(FlashState* s) {
LE_INFO("Flashing CM4");
return flashBinary(s, CM4, CM4_BIN_PATH);
}
void resetPins() {
mtBootstrap_Deactivate();
}
void configureGpio() {
mtRst_SetPushPullOutput(MTRST_ACTIVE_HIGH, true);
mtBootstrap_SetPushPullOutput(MTBOOTSTRAP_ACTIVE_HIGH, true);
}
COMPONENT_INIT {
configureGpio();
flashLdr(&state);
flashN9(&state);
flashCm4(&state);
resetPins();
close(state.serialPort);
}
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