diff options
Diffstat (limited to 'controller/fw/src/mspdebug_wrapper.c')
| -rw-r--r-- | controller/fw/src/mspdebug_wrapper.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/controller/fw/src/mspdebug_wrapper.c b/controller/fw/src/mspdebug_wrapper.c new file mode 100644 index 0000000..3a6d526 --- /dev/null +++ b/controller/fw/src/mspdebug_wrapper.c @@ -0,0 +1,213 @@ + +#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 +}; + |