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#include <unistd.h>
#include <errno.h>
#include <libopencm3/stm32/gpio.h>
#include "output.h"
#include "jtaglib.h"
#include "sr_global.h"
#include "mspdebug_wrapper.h"
#define BLOCK_SIZE 512 /* bytes */
static struct jtdev sr_jtdev;
int flash_and_reset(size_t img_start, size_t img_len, ssize_t (*read_block)(int addr, size_t len, uint8_t *out))
{
union {
uint8_t bytes[BLOCK_SIZE];
uint16_t words[BLOCK_SIZE/2];
} block;
/* Initialize JTAG connection */
unsigned int jtag_id = jtag_init(&sr_jtdev);
if (sr_jtdev.failed)
return -EPIPE;
if (jtag_id != 0x89 && jtag_id != 0x91)
return -EINVAL;
/* Clear flash */
jtag_erase_flash(&sr_jtdev, JTAG_ERASE_MAIN, 0);
if (sr_jtdev.failed)
return -EPIPE;
/* Write flash */
for (size_t p = img_start; p < img_start + img_len; p += BLOCK_SIZE) {
ssize_t nin = read_block(p, BLOCK_SIZE, block.bytes);
if (nin < 0)
return nin;
if (nin & 1) { /* pad unaligned */
block.bytes[nin] = 0;
nin ++;
}
/* Convert to little-endian */
for (ssize_t i=0; i<nin/2; i++)
block.words[i] = htole(block.words[i]);
jtag_write_flash(&sr_jtdev, p, nin/2, block.words);
if (sr_jtdev.failed)
return -EPIPE;
}
/* Verify flash */
/* FIXME
word = jtag_read_mem(NULL, 16, addr+index );
*/
/* Execute power on reset */
jtag_execute_puc(&sr_jtdev);
if (sr_jtdev.failed)
return -EPIPE;
return 0;
}
/* mspdebug HAL shim */
int printc_err(const char *fmt, ...) {
UNUSED(fmt);
/* ignore */
return 0;
}
static void sr_jtdev_power_on(struct jtdev *p) {
UNUSED(p);
/* ignore */
}
static void sr_jtdev_connect(struct jtdev *p) {
UNUSED(p);
/* ignore */
}
enum sr_gpio_types {
SR_GPIO_TCK,
SR_GPIO_TMS,
SR_GPIO_TDI,
SR_GPIO_RST,
SR_GPIO_TST,
SR_GPIO_TDO,
SR_NUM_GPIOS
};
struct {
uint32_t port;
uint16_t num;
} gpios[SR_NUM_GPIOS] = {
[SR_GPIO_TCK] = {GPIOD, 8},
[SR_GPIO_TMS] = {GPIOD, 9},
[SR_GPIO_TDI] = {GPIOD, 10},
[SR_GPIO_RST] = {GPIOD, 11},
[SR_GPIO_TST] = {GPIOD, 12},
[SR_GPIO_TDO] = {GPIOD, 13},
};
static void sr_gpio_write(int num, int out) {
if (out)
gpio_set(gpios[num].port, gpios[num].num);
else
gpio_clear(gpios[num].port, gpios[num].num);
}
static void sr_jtdev_tck(struct jtdev *p, int out) {
UNUSED(p);
sr_gpio_write(SR_GPIO_TCK, out);
}
static void sr_jtdev_tms(struct jtdev *p, int out) {
UNUSED(p);
sr_gpio_write(SR_GPIO_TMS, out);
}
static void sr_jtdev_tdi(struct jtdev *p, int out) {
UNUSED(p);
sr_gpio_write(SR_GPIO_TDI, out);
}
static void sr_jtdev_rst(struct jtdev *p, int out) {
UNUSED(p);
sr_gpio_write(SR_GPIO_RST, out);
}
static void sr_jtdev_tst(struct jtdev *p, int out) {
UNUSED(p);
sr_gpio_write(SR_GPIO_TST, out);
}
static int sr_jtdev_tdo_get(struct jtdev *p) {
UNUSED(p);
return gpio_get(gpios[SR_GPIO_TST].port, gpios[SR_GPIO_TST].num);
}
static void sr_jtdev_tclk(struct jtdev *p, int out) {
UNUSED(p);
sr_gpio_write(SR_GPIO_TST, out);
}
static int sr_jtdev_tclk_get(struct jtdev *p) {
UNUSED(p);
return gpio_get(gpios[SR_GPIO_TDI].port, gpios[SR_GPIO_TDI].num);
}
static void sr_jtdev_tclk_strobe(struct jtdev *p, unsigned int count) {
UNUSED(p);
while (count--) {
gpio_set(gpios[SR_GPIO_TDI].port, gpios[SR_GPIO_TDI].num);
gpio_clear(gpios[SR_GPIO_TDI].port, gpios[SR_GPIO_TDI].num);
}
}
static void sr_jtdev_led_green(struct jtdev *p, int out) {
UNUSED(p);
UNUSED(out);
/* ignore */
}
static void sr_jtdev_led_red(struct jtdev *p, int out) {
UNUSED(p);
UNUSED(out);
/* ignore */
}
static struct jtdev_func sr_jtdev_vtable = {
.jtdev_open = NULL,
.jtdev_close = NULL,
.jtdev_power_off = NULL,
.jtdev_release = NULL,
.jtdev_power_on = sr_jtdev_power_on,
.jtdev_connect = sr_jtdev_connect,
.jtdev_tck = sr_jtdev_tck,
.jtdev_tms = sr_jtdev_tms,
.jtdev_tdi = sr_jtdev_tdi,
.jtdev_rst = sr_jtdev_rst,
.jtdev_tst = sr_jtdev_tst,
.jtdev_tdo_get = sr_jtdev_tdo_get,
.jtdev_tclk = sr_jtdev_tclk,
.jtdev_tclk_get = sr_jtdev_tclk_get,
.jtdev_tclk_strobe = sr_jtdev_tclk_strobe,
.jtdev_led_green = sr_jtdev_led_green,
.jtdev_led_red = sr_jtdev_led_red,
};
static struct jtdev sr_jtdev = {
0,
.f = &sr_jtdev_vtable
};
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