Tabify source code

3 files changed, 232 insertions, 231 deletions

diff --git a/boot/devmode/bootloader.c b/boot/devmode/bootloader.c
index dfa9786..dd28c34 100644
--- a/boot/devmode/bootloader.c
+++ b/boot/devmode/bootloader.c
@@ -14,14 +14,14 @@ crc16(const void *buf, size_t len);
 volatile struct fifo rx_fifo = {0, 0, {0}};
 
 enum ack {
-    ACK = 0x00,
-    NACK = 0xFF
+	ACK = 0x00,
+	NACK = 0xFF
 };
 
 void
 rx_isr(void) __critical __interrupt(0)
 {
-    fifo_push(&rx_fifo, sio_a_data);
+	fifo_push(&rx_fifo, sio_a_data);
 }
 
 static volatile uint32_t millis = 0;
@@ -29,30 +29,30 @@ static volatile uint32_t millis = 0;
 void
 ctc1_isr(void) __critical __interrupt(1)
 {
-    millis += 5;
+	millis += 5;
 }
 
 uint32_t
 clock(void)
 {
-    volatile uint32_t ret;
-    DI;
-    ret = millis;
-    EI;
-    return ret;
+	volatile uint32_t ret;
+	DI;
+	ret = millis;
+	EI;
+	return ret;
 }
 
 void
 putbyte(unsigned char b)
 {
-    unsigned char ctrl = 0;
+	unsigned char ctrl = 0;
 
-    sio_a_data = b;
+	sio_a_data = b;
 
-    while (!(ctrl & 0x04)) {
-	sio_a_ctrl = 0;
-	ctrl = sio_a_ctrl;
-    }
+	while (!(ctrl & 0x04)) {
+		sio_a_ctrl = 0;
+		ctrl = sio_a_ctrl;
+	}
 }
 
 static volatile int32_t errno = 0;
@@ -60,27 +60,27 @@ static volatile int32_t errno = 0;
 u8
 getbyte(void)
 {
-    u8 b;
-    uint32_t ms = clock();
-    errno = 0;
-    while (fifo_empty(&rx_fifo)) {
-	if (clock() - ms > TIMEOUT_MS) {
-	    errno = ERR_TIMEOUT;
-	    return 0;
+	u8 b;
+	uint32_t ms = clock();
+	errno = 0;
+	while (fifo_empty(&rx_fifo)) {
+		if (clock() - ms > TIMEOUT_MS) {
+			errno = ERR_TIMEOUT;
+			return 0;
+		}
 	}
-    }
-    DI;
-    b = fifo_pop(&rx_fifo);
-    EI;
-    return b;
+	DI;
+	b = fifo_pop(&rx_fifo);
+	EI;
+	return b;
 }
 
 void
 flush(void)
 {
-    DI;
-    fifo_clear(&rx_fifo);
-    EI;
+	DI;
+	fifo_clear(&rx_fifo);
+	EI;
 }
 
 
@@ -88,252 +88,253 @@ flush(void)
 u8
 encode(u8 x)
 {
-    u8 y = 0;
-    const u8 c[4] = {0x61, 0x52, 0x34, 0x78};
+	u8 y = 0;
+	const u8 c[4] = {0x61, 0x52, 0x34, 0x78};
 
-    for (u8 i = 0; i < 4; ++i)
-	y ^= ((x >> i) & 1) ? c[i] : 0;
+	for (u8 i = 0; i < 4; ++i)
+		y ^= ((x >> i) & 1) ? c[i] : 0;
 
-    return y;
+	return y;
 }
 
 // Hamming(7,4) decoding
 u8
 decode(u8 x)
 {
-    u8 p = 0;
-    const u8 r[7] = {6, 5, 3, 7, 1, 2, 4};
+	u8 p = 0;
+	const u8 r[7] = {6, 5, 3, 7, 1, 2, 4};
 
-    for (int i = 0; i < 7; ++i)
-	p ^= ((x >> i) & 1) ? r[i] : 0;
+	for (int i = 0; i < 7; ++i)
+		p ^= ((x >> i) & 1) ? r[i] : 0;
 
-    // Assume simple error, attempt correction
-    if (p) {
-	size_t i = 0;
+	// Assume simple error, attempt correction
+	if (p) {
+		size_t i = 0;
 
-	for (i = 0; i < LENGTH(r); ++i) {
-	    if (r[i] == x)
-		break;
-	}
+		for (i = 0; i < LENGTH(r); ++i) {
+			if (r[i] == x)
+				break;
+		}
 
-	x ^= (1 << i);
-    }
+		x ^= (1 << i);
+	}
 
-    return x & 0x0F;
+	return x & 0x0F;
 }
 
 
 int
 read(void *buf, size_t count)
 {
-    u8 b;
-    u8 *p = buf;
+	u8 b;
+	u8 *p = buf;
 
-    for (int n = 0; n < count; ++n) {
-	b = decode(getbyte());
-	if (errno)
-	    return errno;
+	for (int n = 0; n < count; ++n) {
+		b = decode(getbyte());
+		if (errno)
+			return errno;
 
-	b |= (decode(getbyte()) << 4);
-	if (errno)
-	    return errno;
+		b |= (decode(getbyte()) << 4);
+		if (errno)
+			return errno;
 
-	p[n] = b;
-    }
+		p[n] = b;
+	}
 
-    return 0;
+	return 0;
 }
 
 int
 write(const void *buf, size_t count)
 {
-    const u8 *p = buf;
+	const u8 *p = buf;
 
-    for (size_t i = 0; i < count; ++i) {
-	putbyte(encode(p[i] & 0x0F));
-	putbyte(encode((p[i] >> 4) & 0x0F));
-    }
+	for (size_t i = 0; i < count; ++i) {
+		putbyte(encode(p[i] & 0x0F));
+		putbyte(encode((p[i] >> 4) & 0x0F));
+	}
 
-    return 0;
+	return 0;
 }
 
 int
 read_header(struct header *header)
 {
-    int err;
-    u8 ack;
-    u16 checksum;
+	int err;
+	u8 ack;
+	u16 checksum;
 
-    while (1) {
-	if ((err = read(header, sizeof(*header))))
-	    return err;
+	while (1) {
+		if ((err = read(header, sizeof(*header))))
+			return err;
 
-	checksum = header->checksum;
-	header->checksum = 0;
+		checksum = header->checksum;
+		header->checksum = 0;
 
-	if (checksum == crc16(header, sizeof(*header))) {
-	    header->checksum = checksum;
-	    ack = ACK;
-	    write(&ack, sizeof(ack));
-	    return 0;
-	} else {
-	    ack = NACK;
-	    write(&ack, sizeof(ack));
+		if (checksum == crc16(header, sizeof(*header))) {
+			header->checksum = checksum;
+			ack = ACK;
+			write(&ack, sizeof(ack));
+			return 0;
+		} else {
+			ack = NACK;
+			write(&ack, sizeof(ack));
+		}
 	}
-    }
 }
 
 int
 read_buf(size_t len, void *buf)
 {
-    int err;
-    u8 ack;
-    u16 checksum;
+	int err;
+	u8 ack;
+	u16 checksum;
 
-    for (int i = 0; i < MAX_TRANS_ATTEMPTS; ++i) {
-	// TODO: reduce code?
-	if ((err = read(&checksum, sizeof(checksum)))
-	    || (err = read(buf, len)))
-	    break;
+	for (int i = 0; i < MAX_TRANS_ATTEMPTS; ++i) {
+		// TODO: reduce code?
+		if ((err = read(&checksum, sizeof(checksum)))
+		    || (err = read(buf, len)))
+			break;
 
-	if (checksum == crc16(buf, len)) {
-	    ack = ACK;
-	    write(&ack, sizeof(ack));
-	    return 0;
-	} else {
-	    ack = NACK;
-	    write(&ack, sizeof(ack));
+		if (checksum == crc16(buf, len)) {
+			ack = ACK;
+			write(&ack, sizeof(ack));
+			return 0;
+		} else {
+			ack = NACK;
+			write(&ack, sizeof(ack));
+		}
 	}
-    }
 
-    return -1;
+	return -1;
 }
 
 int
 write_buf(size_t len, const void *buf)
 {
-    int err;
-    u8 ack = NACK;
-    u16 checksum = crc16(buf, len);
+	int err;
+	u8 ack = NACK;
+	u16 checksum = crc16(buf, len);
 
-    for (int i = 0; i < MAX_TRANS_ATTEMPTS; ++i){
-	write(&checksum, sizeof(checksum));
-	write(buf, len);
+	for (int i = 0; i < MAX_TRANS_ATTEMPTS; ++i){
+		write(&checksum, sizeof(checksum));
+		write(buf, len);
 
-	// If TIMEOUT sending just give up
-	if ((err = read(&ack, sizeof(ack))))
-	    return err;
+		// If TIMEOUT sending just give up
+		if ((err = read(&ack, sizeof(ack))))
+			return err;
 
-	if (ack == ACK)
-	    return 0;
-    }
+		if (ack == ACK)
+			return 0;
+	}
 
-    return -1;
+	return -1;
 }
 
 // TODO: Restart after timeouts
 void
 loop(void)
 {
-    struct header header;
-    u8 buf[MAX_PACKET_SIZE];
+	struct header header;
+	u8 buf[MAX_PACKET_SIZE];
 
-    while (1) {
-	if (read_header(&header)) {
-	    flush();
-	    continue;
-	}
+	while (1) {
+		if (read_header(&header)) {
+			flush();
+			continue;
+		}
 
-	switch (header.type) {
-	case CMD_BOOT:
-	    ((void (*)(void))header.address)();
-	    break;
+		switch (header.type) {
+		case CMD_BOOT:
+			((void (*)(void))header.address)();
+			break;
 
-	case CMD_READ:
-	    write_buf(header.length, (const void *)header.address);
-	    break;
+		case CMD_READ:
+			write_buf(header.length, (const void *)header.address);
+			break;
 
-	case CMD_WRITE:
-	    if (!read_buf(header.length, buf))
-		memcpy((void *)header.address, buf, header.length);
-	    break;
+		case CMD_WRITE:
+			if (!read_buf(header.length, buf))
+				memcpy((void *)header.address, buf, header.length);
+			break;
 
-	case CMD_ECHO:
-	    if (!read_buf(header.length, buf))
-		write_buf(header.length, buf);
-	    break;
+		case CMD_ECHO:
+			if (!read_buf(header.length, buf))
+				write_buf(header.length, buf);
+			break;
 
-	default:
-	    break;
-	}
+		default:
+			break;
+		}
 
-	flush();
-    }
+		flush();
+	}
 }
 
 static inline void
 init_ctc(void)
 {
-    ctc_channel_0 = CTC_CTRL(0);
+	ctc_channel_0 = CTC_CTRL(0);
 
-    /* 200Hz clock */
-    ctc_channel_1 = CTC_CTRL(CTC_INT_BIT | CTC_PRESCALER_BIT
-			     | CTC_TIME_CONST_BIT | CTC_RST_BIT);
-    ctc_channel_1 = 0;
+	/* 200Hz clock */
+	ctc_channel_1 = CTC_CTRL(CTC_INT_BIT | CTC_PRESCALER_BIT
+				 | CTC_TIME_CONST_BIT | CTC_RST_BIT);
+	ctc_channel_1 = 0;
 
-    ctc_channel_2 = CTC_CTRL(0);
-    ctc_channel_3 = CTC_CTRL(0);
+	ctc_channel_2 = CTC_CTRL(0);
+	ctc_channel_3 = CTC_CTRL(0);
 
-    // Interrupt table for CTC
-    // Final address is (Ireg << 8) | ctc_isr_ptr | {00/01/10/11} | 0
-    ctc_channel_0 = CTC_INT_VEC(0x10);
+	// Interrupt table for CTC
+	// Final address is (Ireg << 8) | ctc_isr_ptr | {00/01/10/11} | 0
+	ctc_channel_0 = CTC_INT_VEC(0x10);
 }
 
 static inline void
 init_pio(void)
 {
-    // Disable PIO interrupts
-    port_a_ctrl = PIO_INT_CTRL(0);
-    port_b_ctrl = PIO_INT_CTRL(0);
+	// Disable PIO interrupts
+	port_a_ctrl = PIO_INT_CTRL(0);
+	port_b_ctrl = PIO_INT_CTRL(0);
 }
 
 static inline void
 init_sio(void)
 {
-    static const u8 sio_a_cfg[] = {
-	0b00011000,			 // Reset channel
-	4	  ,			 // wr4
-	0b01000100,			 // X16 clock (115200), one stop bit, no parity
-	1	  ,			 // wr1
-	SIO_RX_INT_MD0 | SIO_RX_INT_MD1, // interrupt on every Rx, no wait function
-	3	  ,			 // wr3
-	0b11000001,			 // enable Rx - 8 bit char
-	5	  ,			 // wr5
-	0b01101000			 // enable Tx - 8 bit char
-    };
+	static const u8 sio_a_cfg[] = {
+		// Reset channel
+		0b00011000,
+		// wr4: X16 clock (115200), one stop bit, no parity
+		4, 0b01000100,
+		// wr1: interrupt on every Rx, no wait function
+		1, SIO_RX_INT_MD0 | SIO_RX_INT_MD1,
+		// wr3: enable Rx - 8 bit char
+		3, 0b11000001
+		// wr5: enable Tx - 8 bit char
+		5, 0b01101000
+	};
 
-    static const u8 sio_b_cfg[] = {
-	0b00011000,			// Reset channel
-	2	  ,			// load interrupt vector
-	0x1C				// int_table_rx
-    };
+	static const u8 sio_b_cfg[] = {
+		// Reset channel
+		0b00011000,
+		2, 0x1C // load interrupt vector, int_table_rx
+	};
 
-    for (u8 i = 0; i < LENGTH(sio_a_cfg); ++i)
-	sio_a_ctrl = sio_a_cfg[i];
+	for (u8 i = 0; i < LENGTH(sio_a_cfg); ++i)
+		sio_a_ctrl = sio_a_cfg[i];
 
-    for (u8 i = 0; i < LENGTH(sio_b_cfg); ++i)
-	sio_b_ctrl = sio_b_cfg[i];
+	for (u8 i = 0; i < LENGTH(sio_b_cfg); ++i)
+		sio_b_ctrl = sio_b_cfg[i];
 }
 
 void
 main(void)
 {
-    init_ctc();
-    init_pio();
-    init_sio();
+	init_ctc();
+	init_pio();
+	init_sio();
 
-    IM(2);
-    EI;
+	IM(2);
+	EI;
 
-    loop();
+	loop();
 }
diff --git a/boot/devmode/crc16.c b/boot/devmode/crc16.c
index ac17529..3810ab6 100644
--- a/boot/devmode/crc16.c
+++ b/boot/devmode/crc16.c
@@ -2,48 +2,48 @@
 #include <stddef.h>
 
 static const u16 crc_table[256] = {
-    0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
-    0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
-    0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
-    0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
-    0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
-    0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
-    0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
-    0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
-    0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
-    0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
-    0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
-    0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
-    0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
-    0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
-    0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
-    0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
-    0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
-    0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
-    0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
-    0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
-    0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
-    0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
-    0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
-    0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
-    0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
-    0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
-    0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
-    0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
-    0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
-    0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
-    0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
-    0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
+	0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
+	0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
+	0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
+	0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
+	0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
+	0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
+	0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
+	0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
+	0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
+	0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
+	0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
+	0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
+	0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
+	0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
+	0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
+	0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
+	0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
+	0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
+	0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
+	0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
+	0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
+	0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
+	0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
+	0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
+	0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
+	0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
+	0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
+	0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
+	0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
+	0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
+	0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
+	0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
 };
 
 u16
 crc16(const void *buf, size_t len)
 {
-    const u8 *p = buf;
+	const u8 *p = buf;
 
-    u16 crc = 0;
-    while (len--)
-	crc = crc_table[(crc >> 8) ^ (*p++)] ^ (crc << 8);
+	u16 crc = 0;
+	while (len--)
+		crc = crc_table[(crc >> 8) ^ (*p++)] ^ (crc << 8);
 
-    return crc;
+	return crc;
 }
diff --git a/boot/devmode/devmode.h b/boot/devmode/devmode.h
index f3322d0..e860893 100644
--- a/boot/devmode/devmode.h
+++ b/boot/devmode/devmode.h
@@ -10,28 +10,28 @@
 #endif
 
 enum header_type {
-    CMD_PING,
-    CMD_INFO,
-    CMD_BOOT,
-    CMD_READ,
-    CMD_WRITE,
-    CMD_IO_READ,
-    CMD_IO_WRITE,
-    CMD_ECHO
+	CMD_PING,
+	CMD_INFO,
+	CMD_BOOT,
+	CMD_READ,
+	CMD_WRITE,
+	CMD_IO_READ,
+	CMD_IO_WRITE,
+	CMD_ECHO
 };
 
 struct header {
-    u8 type;
-    u8 bank;
-    u16 address;
-    u16 length;
-    u16 checksum;
+	u8 type;
+	u8 bank;
+	u16 address;
+	u16 length;
+	u16 checksum;
 } PACKED;
 
 // static_assert(sizeof(struct header) == 8, "struct header is not PACKED");
 
 enum error {
-    ERR_TIMEOUT = -1
+	ERR_TIMEOUT = -1
 };
 
 #define MAX_PACKET_SIZE 256