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stlink.c
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stlink.c
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/* stlink common and stlink-v1 specific functions
(c) Valentin Dudouyt, 2012-2013 */
#include <stdio.h>
#include <stddef.h>
#ifdef __linux__
#include <endian.h>
#endif
#include <assert.h>
#include <string.h>
#include <stdbool.h>
#include <stdarg.h>
#include <unistd.h>
#include "stm8.h"
#include "pgm.h"
#include "stlink.h"
#include "utils.h"
#define STLK_FLAG_ERR 0x01
#define STLK_FLAG_BUFFER_FULL 0x04
#define STLK_READ_BUFFER_SIZE 6144
#define STLK_MAX_WRITE 512
unsigned int stlink_swim_get_status(programmer_t *pgm);
int stlink_swim_read_byte(programmer_t *pgm, unsigned char byte, unsigned int start);
int stlink_swim_write_byte(programmer_t *pgm, unsigned char byte, unsigned int start);
void stlink_send_message(programmer_t *pgm, int count, ...) {
va_list ap;
unsigned char data[32];
int i, r, actual;
va_start(ap, count);
assert(pgm->out_msg_size < sizeof(data));
assert(count <= pgm->out_msg_size);
memset(data, 0, pgm->out_msg_size);
for(i = 0; i < count; i++)
data[i] = va_arg(ap, int);
r = libusb_bulk_transfer(pgm->dev_handle, (2 | LIBUSB_ENDPOINT_OUT), data, pgm->out_msg_size, &actual, 0);
assert(r == 0);
pgm->msg_count++;
return;
}
int stlink_read(programmer_t *pgm, unsigned char *buffer, int count) {
int r, recv;
r = libusb_bulk_transfer(pgm->dev_handle, (1 | LIBUSB_ENDPOINT_IN), buffer, count, &recv, 0);
assert(r==0);
return(recv);
}
int stlink_read1(programmer_t *pgm, int count) {
unsigned char buf[16];
return(stlink_read(pgm, buf, count));
}
int stlink_read_and_cmp(programmer_t *pgm, int count, ...) {
va_list ap;
unsigned char buf[16];
int recv = stlink_read(pgm, buf, count);
int i, ret = 0;
va_start(ap, count);
for(i = 0; i < count; i++) {
if(buf[i] != va_arg(ap, int))
ret++;
}
return(ret);
}
unsigned char *pack_int16(uint16_t word, unsigned char *out) {
// Filling with bytes in big-endian order
out[0] = (word & 0xff00) >> 8;
out[1] = (word & 0x00ff);
return(out+2);
}
uint16_t unpack_int16_le(unsigned char *block) {
uint32_t ret;
ret = *(block + 1) << 8;
ret += *(block + 0);
return(ret);
}
uint16_t unpack_int16(unsigned char *block) {
uint32_t ret;
ret = *(block + 0) << 8;
ret += *(block + 1);
return(ret);
}
unsigned char *pack_int32(uint32_t word, unsigned char *out) {
out[0] = (word & 0xff000000) >> 24;
out[1] = (word & 0x00ff0000) >> 16;
out[2] = (word & 0x0000ff00) >> 8;
out[3] = (word & 0x000000ff);
return(out+4);
}
unsigned char *pack_int32_le(uint32_t word, unsigned char *out) {
// Filling with bytes in little-endian order
out[0] = (word & 0x000000ff);
out[1] = (word & 0x0000ff00) >> 8;
out[2] = (word & 0x00ff0000) >> 16;
out[3] = (word & 0xff000000) >> 24;
return(out+4);
}
uint32_t unpack_int32(unsigned char *block) {
uint32_t ret;
ret = *(block + 0) << 24;
ret += *(block + 1) << 16;
ret += *(block + 2) << 8;
ret += *(block + 3);
return(ret);
}
uint32_t unpack_int32_le(unsigned char *block) {
uint32_t ret;
ret = *(block + 3) << 24;
ret += *(block + 2) << 16;
ret += *(block + 1) << 8;
ret += *(block + 0);
return(ret);
}
void pack_usb_cbw(scsi_usb_cbw *cbw, unsigned char *out) {
unsigned char *offset = out;
offset = pack_int32(cbw->signature, offset);
offset = pack_int32(cbw->tag, offset);
offset = pack_int32_le(cbw->transfer_length, offset);
offset[0] = cbw->flags;
offset[1] = cbw->LUN;
offset[2] = cbw->cblength;
offset += 3;
memcpy(offset, cbw->cb, sizeof(cbw->cb));
offset += sizeof(cbw->cb);
assert(offset - out == USB_CBW_SIZE);
}
void unpack_usb_csw(unsigned char *block, scsi_usb_csw *out) {
out->signature = unpack_int32(block);
out->tag = unpack_int32(block + 4);
out->data_residue = unpack_int32_le(block + 8);
out->status = block[12];
}
int stlink_send_cbw(libusb_device_handle *dev_handle, scsi_usb_cbw *cbw) {
unsigned char buf[USB_CBW_SIZE];
cbw->signature = USB_CBW_SIGNATURE;
cbw->tag = 0x707ec281;
pack_usb_cbw(cbw, buf);
int actual;
int r = libusb_bulk_transfer(dev_handle,
(2 | LIBUSB_ENDPOINT_OUT),
buf,
USB_CBW_SIZE,
&actual,
0);
assert(actual == USB_CBW_SIZE);
return(r);
}
int stlink_read_csw(libusb_device_handle *dev_handle, scsi_usb_csw *csw) {
unsigned char buf[USB_CSW_SIZE];
int recv;
int r = libusb_bulk_transfer(dev_handle,
(1 | LIBUSB_ENDPOINT_IN),
buf,
USB_CSW_SIZE,
&recv,
0);
assert(recv == USB_CSW_SIZE);
unpack_usb_csw(buf, csw);
return(r);
}
scsi_usb_cbw cbw;
scsi_usb_csw csw;
int stlink_test_unit_ready(programmer_t *pgm) {
// This is a default SCSI command
memset(&cbw, 0, sizeof(scsi_usb_cbw));
cbw.cblength = 0x06;
int r;
r = stlink_send_cbw(pgm->dev_handle, &cbw);
assert(r == 0);
r = stlink_read_csw(pgm->dev_handle, &csw);
assert(r == 0);
return(csw.status == 0);
}
int stlink_cmd(programmer_t *pgm, int transfer_length, unsigned char *transfer_out, unsigned char flags,
int cblength, ...) {
va_list ap;
memset(&cbw, 0, sizeof(scsi_usb_cbw));
cbw.transfer_length = transfer_length;
cbw.flags = flags;
cbw.cblength = cblength;
va_start(ap, cblength);
int i;
for(i = 0; i < cblength; i++) {
cbw.cb[i] = va_arg(ap, int);
}
assert( stlink_send_cbw(pgm->dev_handle, &cbw) == 0);
if(transfer_length) {
// Transfer expected, read some raw data
if(transfer_out)
stlink_read(pgm, transfer_out, transfer_length);
else
stlink_read1(pgm, transfer_length);
}
// Reading status
stlink_read_csw(pgm->dev_handle, &csw);
return(csw.status == 0);
}
int stlink_cmd_swim_read(programmer_t *pgm, uint16_t length, uint16_t start) {
memset(&cbw, 0, sizeof(scsi_usb_cbw));
cbw.transfer_length = length;
cbw.flags = 0x80;
cbw.cblength = 0x0a;
cbw.cb[0] = 0xf4;
cbw.cb[1] = 0x0c;
pack_int16(length, cbw.cb+2);
pack_int16(start, cbw.cb+6);
return 0;
}
void stlink_init_session(programmer_t *pgm) {
int i;
char f4_cmd_arg1[] = { 0x07,
0x07,
0x08,
0x07,
0x04,
};
for(i = 0; i < sizeof(f4_cmd_arg1); i++) {
stlink_cmd(pgm, 0, NULL, 0x00, 0x0a,
0xf4, f4_cmd_arg1[i],
0x01, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00);
stlink_swim_get_status(pgm);
}
do {
usleep(10000);
} while ((stlink_swim_get_status(pgm) & 1) != 0);
stlink_cmd(pgm, 0, NULL, 0x00, 0x03,
0xf4, 0x03,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00);
stlink_swim_get_status(pgm);
stlink_cmd(pgm, 0, NULL, 0x00, 0x0a,
0xf4, 0x05,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00);
stlink_swim_get_status(pgm);
stlink_swim_write_byte(pgm, 0xa0, 0x7f80); // mov 0x0a, SWIM_CSR2 ;; Init SWIM
stlink_cmd(pgm, 0, NULL, 0x00, 0x0a,
0xf4, 0x08,
0x00, 0x01,
0x00, 0x00,
0x7f, 0x80,
0xa0, 0x00);
stlink_swim_get_status(pgm);
stlink_cmd(pgm, 0, NULL, 0x00, 0x0a,
0xf4, 0x06,
0x00, 0x01,
0x00, 0x00,
0x7f, 0x99,
0xa0, 0x00);
stlink_swim_get_status(pgm);
stlink_swim_write_byte(pgm, 0xb0, 0x7f80);
stlink_cmd(pgm, 0, NULL, 0x00, 0x03, // Elsewise, only zeroes will be received
0xf4, 0x03,
0x01);
stlink_swim_get_status(pgm);
stlink_swim_write_byte(pgm, 0xb4, 0x7f80);
}
void stlink_finish_session(programmer_t *pgm) {
stlink_swim_write_byte(pgm, 0xb6, 0x7f80);
stlink_cmd(pgm, 0, NULL, 0x00, 0x0a,
0xf4, 0x05,
0x00, 0x01,
0x00, 0x00,
0x7f, 0x80,
0xb6, 0x00);
stlink_swim_get_status(pgm);
stlink_cmd(pgm, 0, NULL, 0x00, 0x0a,
0xf4, 0x07,
0x00, 0x01,
0x00, 0x00,
0x7f, 0x80,
0xb6, 0x00);
stlink_swim_get_status(pgm);
stlink_cmd(pgm, 0, NULL, 0x00, 0x03,
0xf4, 0x03,
0x01);
stlink_swim_get_status(pgm);
}
unsigned int stlink_swim_get_status(programmer_t *pgm) {
unsigned char buf[4];
stlink_cmd(pgm, 4, buf, 0x80, 0x0a,
0xf4, 0x09,
0x01, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00);
return(unpack_int32_le(buf));
}
bool stlink_open(programmer_t *pgm) {
unsigned char buf[18];
pgm->out_msg_size = 31;
stlink_test_unit_ready(pgm);
stlink_cmd(pgm, 0x06, buf, 0x80, 6, 0xf1, 0x80, 0x00, 0x00, 0x00, 0x00);
stlink_test_unit_ready(pgm);
stlink_cmd(pgm, 0x12, buf, 0x80, 6, 0x12, 0x80, 0x00, 0x00, 0x20);
stlink_test_unit_ready(pgm);
stlink_cmd(pgm, 2, buf, 0x80, 2, 0xf5, 0x00); // Reading status
stlink_test_unit_ready(pgm);
int status = unpack_int16_le(buf);
switch(status) {
case 0x0000: // Ok
stlink_cmd(pgm, 0, NULL, 0x80, 2, 0xf3, 0x07); // Start initializing sequence
stlink_cmd(pgm, 0, NULL, 0x00, 2, 0xf4, 0x00); // Turn the lights on
stlink_cmd(pgm, 2, buf, 0x80, 2, 0xf4, 0x0d);
stlink_cmd(pgm, 8, buf, 0x80, 3, 0xf4, 0x02, 0x01); // End init
case 0x0003: // Already initialized
return(true);
case 0x0001: // Busy
break;
default:
fprintf(stderr, "Unknown status: %x\n", status);
}
return(false);
}
void stlink_close(programmer_t *pgm) {
libusb_exit(pgm->ctx); //close the session
}
void stlink_swim_srst(programmer_t *pgm) {
// Ready bytes count (always 1 here)
stlink_cmd(pgm, 0, NULL, 0x80, 0x0a,
0xf4, 0x08,
0x00, 0x01,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00);
stlink_swim_get_status(pgm);
}
int stlink_swim_write_byte(programmer_t *pgm, unsigned char byte, unsigned int start) {
unsigned char buf[4], start2[2];
int result, tries = 0;
pack_int16(start, start2);
DEBUG_PRINT("stlink_swim_write_byte\n");
do {
stlink_cmd(pgm, 0, NULL, 0x00, 0x10,
0xf4, 0x0a,
0x00, 0x01,
0x00, 0x00,
start2[0], start2[1],
byte, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
usleep(2000);
// Ready bytes count (always 1 here)
stlink_cmd(pgm, 4, buf, 0x80, 0x0a,
0xf4, 0x09,
0x00, 0x01,
0x00, 0x00,
start2[0], start2[1],
byte, 0x00);
result = unpack_int16_le(buf);
tries++;
if(result & STLK_FLAG_BUFFER_FULL) {
usleep(4000); // Chill out
DEBUG_PRINT("retry\n");
continue;
}
if(result & STLK_FLAG_ERR)
break;
} while(result & STLK_FLAG_ERR && tries < 5);
return(result);
}
int stlink_swim_read_range(programmer_t *pgm, const stm8_device_t *device, unsigned char *buffer, unsigned int start, unsigned int length) {
DEBUG_PRINT("stlink_swim_read_range\n");
stlink_init_session(pgm);
stlink_swim_write_byte(pgm, 0x00, device->regs.CLK_CKDIVR); // mov 0x00, CLK_DIVR
int i;
for(i = 0; i < length; i += STLK_READ_BUFFER_SIZE) {
unsigned char block_start2[2], block_size2[2];
int block_start = start + i;
// Determining block size
int block_size = length - i;
if(block_size > STLK_READ_BUFFER_SIZE)
block_size = STLK_READ_BUFFER_SIZE;
DEBUG_PRINT("Reading %d bytes from %x\n", block_size, block_start);
// Starting SWIM transfer
pack_int16(block_start, block_start2);
pack_int16(block_size, block_size2);
stlink_cmd(pgm, 0, NULL, 0x80, 0x0a,
0xf4, 0x0b,
block_size2[0], block_size2[1],
0x00, 0x00,
block_start2[0], block_start2[1],
0x00, 0x00);
// Waiting until the data becomes ready
int result;
do {
usleep(2000);
result = stlink_swim_get_status(pgm);
} while(result & 1);
// Downloading bytes from stlink
stlink_cmd(pgm, block_size, &(buffer[i]), 0x80, 0x0a,
0xf4, 0x0c,
block_size2[0], block_size2[1],
0x00, 0x00,
block_start2[0], block_start2[1],
0x00, 0x00);
}
stlink_finish_session(pgm);
return(length);
}
int stlink_swim_wait(programmer_t *pgm) {
int result;
do {
usleep(3000);
result = stlink_swim_get_status(pgm);
} while(result & 1);
return(result);
}
int stlink_swim_write_block(programmer_t *pgm, unsigned char *buffer,
unsigned int start,
unsigned int length,
unsigned int padding
) {
int length1 = 8 - padding; // Amount to be transferred with CBW
int length2 = length - 8 + padding; // Amount to be transferred with additional transfer
if (length2 < 0) length2 = 0;
unsigned char block_size2[2], block_start2[2];
pack_int16(start, block_start2);
pack_int16(length, block_size2);
// Some logical checks
assert(padding >= 0 && padding <= 1);
assert(length1 + length2 == length);
assert(length1 + padding <= 8);
assert(length2 < STLK_MAX_WRITE - 6);
assert(length1 > 0);
assert(length2 > 0);
// Filling CBW
memset(&cbw, 0, sizeof(scsi_usb_cbw));
cbw.transfer_length = length2 + padding;
cbw.flags = 0x00;
cbw.cblength = 0x10;
cbw.cb[0] = 0xf4;
cbw.cb[1] = 0x0a;
memcpy(cbw.cb+2, block_size2, 2);
memcpy(cbw.cb+6, block_start2, 2);
memcpy(cbw.cb+8+padding, buffer, length1);
if(padding) cbw.cb[8] = '\0';
assert( stlink_send_cbw(pgm->dev_handle, &cbw) == 0);
usleep(3000);
if(length2) {
// Sending the rest
unsigned char tail[STLK_MAX_WRITE-6];
memcpy(tail, buffer + length1, length2);
if(padding) tail[length2] = '\1';
int actual;
int r = libusb_bulk_transfer(pgm->dev_handle,
(2 | LIBUSB_ENDPOINT_OUT),
tail,
length2 + padding,
&actual,
0);
assert(actual == length2 + padding);
}
// Reading status
stlink_read_csw(pgm->dev_handle, &csw);
assert(csw.status == 0);
memset(cbw.cb+8, 0, 8);
cbw.cb[8] = 0x01;
cbw.cb[9] = 0x02;
int result = stlink_swim_wait(pgm);
return(result);
}
int stlink_swim_write_range(programmer_t *pgm, const stm8_device_t *device, unsigned char *buffer, unsigned int start, unsigned int length, const memtype_t memtype) {
int i;
stlink_init_session(pgm);
stlink_swim_write_byte(pgm, 0x00, device->regs.CLK_CKDIVR);
if(memtype == FLASH || memtype == EEPROM || memtype == OPT) {
stlink_swim_write_byte(pgm, 0x00, device->regs.FLASH_IAPSR);
}
if(memtype == FLASH) {
stlink_swim_write_byte(pgm, 0x56, device->regs.FLASH_PUKR);
stlink_swim_write_byte(pgm, 0xae, device->regs.FLASH_PUKR);
}
if(memtype == EEPROM || memtype == OPT) {
stlink_swim_write_byte(pgm, 0xae, device->regs.FLASH_DUKR);
stlink_swim_write_byte(pgm, 0x56, device->regs.FLASH_DUKR);
}
if(memtype == FLASH || memtype == EEPROM || memtype == OPT) {
stlink_swim_write_byte(pgm, 0x56, device->regs.FLASH_IAPSR);
}
int flash_block_size = device->flash_block_size;
for(i = 0; i < length; i+=flash_block_size) {
unsigned char block[128];
memset(block, 0, sizeof(block));
int block_size = length - i;
if(block_size > flash_block_size)
block_size = flash_block_size;
DEBUG_PRINT("Writing block %04x with size %d\n", start+i, block_size);
memcpy(block, buffer+i, block_size);
if(block_size < flash_block_size) {
DEBUG_PRINT("Padding block %04x with %d zeroes\n",
start+i,
flash_block_size - block_size);
block_size = flash_block_size;
}
if(memtype == FLASH || memtype == EEPROM || memtype == OPT) {
stlink_swim_write_byte(pgm, 0x01, device->regs.FLASH_CR2);
if(device->regs.FLASH_NCR2 != 0) { // Device have FLASH_NCR2 register
stlink_swim_write_byte(pgm, 0xFE, device->regs.FLASH_NCR2);
}
}
int result = stlink_swim_write_block(pgm, block, start + i, block_size, 0);
if(result & STLK_FLAG_ERR)
fprintf(stderr, "Write error\n");
}
if(memtype == FLASH || memtype == EEPROM || memtype == OPT) {
stlink_swim_write_byte(pgm, 0x56, device->regs.FLASH_IAPSR);
}
stlink_finish_session(pgm);
return(length);
}