diff options
Diffstat (limited to 'src/jtag/drivers/stlink_usb.c')
-rw-r--r-- | src/jtag/drivers/stlink_usb.c | 128 |
1 files changed, 116 insertions, 12 deletions
diff --git a/src/jtag/drivers/stlink_usb.c b/src/jtag/drivers/stlink_usb.c index e373a27..68179c3 100644 --- a/src/jtag/drivers/stlink_usb.c +++ b/src/jtag/drivers/stlink_usb.c @@ -32,6 +32,8 @@ #include <jtag/stlink/stlink_interface.h> #include <target/target.h> +#include <target/cortex_m.h> + #include "libusb_common.h" #define ENDPOINT_IN 0x80 @@ -142,9 +144,11 @@ struct stlink_usb_handle_s { #define STLINK_DEBUG_APIV2_RESETSYS 0x32 #define STLINK_DEBUG_APIV2_READREG 0x33 #define STLINK_DEBUG_APIV2_WRITEREG 0x34 +#define STLINK_DEBUG_APIV2_WRITEDEBUGREG 0x35 +#define STLINK_DEBUG_APIV2_READDEBUGREG 0x36 #define STLINK_DEBUG_APIV2_READALLREGS 0x3A - +#define STLINK_DEBUG_APIV2_GETLASTRWSTATUS 0x3B #define STLINK_DEBUG_APIV2_DRIVE_NRST 0x3C #define STLINK_DEBUG_APIV2_DRIVE_NRST_LOW 0x00 @@ -649,6 +653,76 @@ static int stlink_usb_idcode(void *handle, uint32_t *idcode) return ERROR_OK; } +static int stlink_usb_v2_read_debug_reg(void *handle, uint32_t addr, uint32_t *val) +{ + struct stlink_usb_handle_s *h; + int res; + + assert(handle != NULL); + + h = (struct stlink_usb_handle_s *)handle; + + stlink_usb_init_buffer(handle, STLINK_RX_EP, 8); + + h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND; + h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READDEBUGREG; + h_u32_to_le(h->cmdbuf+h->cmdidx, addr); + h->cmdidx += 4; + + res = stlink_usb_xfer(handle, h->databuf, 8); + + if (res != ERROR_OK) + return res; + + *val = le_to_h_u32(h->databuf + 4); + + return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL; +} + +static int stlink_usb_write_debug_reg(void *handle, uint32_t addr, uint32_t val) +{ + int res; + struct stlink_usb_handle_s *h; + + assert(handle != NULL); + + h = (struct stlink_usb_handle_s *)handle; + + stlink_usb_init_buffer(handle, STLINK_RX_EP, 2); + + h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND; + if (h->jtag_api == STLINK_JTAG_API_V1) + h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_WRITEDEBUGREG; + else + h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_WRITEDEBUGREG; + h_u32_to_le(h->cmdbuf+h->cmdidx, addr); + h->cmdidx += 4; + h_u32_to_le(h->cmdbuf+h->cmdidx, val); + h->cmdidx += 4; + + res = stlink_usb_xfer(handle, h->databuf, 2); + + if (res != ERROR_OK) + return res; + + return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL; +} + +static enum target_state stlink_usb_v2_get_status(void *handle) +{ + int result; + uint32_t status; + + result = stlink_usb_v2_read_debug_reg(handle, DCB_DHCSR, &status); + if (result != ERROR_OK) + return TARGET_UNKNOWN; + + if (status & S_HALT) + return TARGET_HALTED; + + return TARGET_RUNNING; +} + /** */ static enum target_state stlink_usb_state(void *handle) { @@ -660,7 +734,7 @@ static enum target_state stlink_usb_state(void *handle) h = (struct stlink_usb_handle_s *)handle; if (h->jtag_api == STLINK_JTAG_API_V2) - return TARGET_UNKNOWN; + return stlink_usb_v2_get_status(handle); stlink_usb_init_buffer(handle, STLINK_RX_EP, 2); @@ -720,7 +794,7 @@ static int stlink_usb_run(void *handle) h = (struct stlink_usb_handle_s *)handle; if (h->jtag_api == STLINK_JTAG_API_V2) - return ERROR_FAIL; + return stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_DEBUGEN); stlink_usb_init_buffer(handle, STLINK_RX_EP, 2); @@ -746,7 +820,7 @@ static int stlink_usb_halt(void *handle) h = (struct stlink_usb_handle_s *)handle; if (h->jtag_api == STLINK_JTAG_API_V2) - return ERROR_FAIL; + return stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_HALT|C_DEBUGEN); stlink_usb_init_buffer(handle, STLINK_RX_EP, 2); @@ -772,7 +846,7 @@ static int stlink_usb_step(void *handle) h = (struct stlink_usb_handle_s *)handle; if (h->jtag_api == STLINK_JTAG_API_V2) - return ERROR_FAIL; + return stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_STEP|C_DEBUGEN); stlink_usb_init_buffer(handle, STLINK_RX_EP, 2); @@ -823,7 +897,7 @@ static int stlink_usb_read_reg(void *handle, int num, uint32_t *val) h = (struct stlink_usb_handle_s *)handle; - stlink_usb_init_buffer(handle, STLINK_RX_EP, 4); + stlink_usb_init_buffer(handle, STLINK_RX_EP, h->jtag_api == STLINK_JTAG_API_V1 ? 4 : 8); h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND; if (h->jtag_api == STLINK_JTAG_API_V1) @@ -832,12 +906,17 @@ static int stlink_usb_read_reg(void *handle, int num, uint32_t *val) h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READREG; h->cmdbuf[h->cmdidx++] = num; - res = stlink_usb_xfer(handle, h->databuf, 4); + res = stlink_usb_xfer(handle, h->databuf, h->jtag_api == STLINK_JTAG_API_V1 ? 4 : 8); if (res != ERROR_OK) return res; - *val = le_to_h_u32(h->databuf); + if (h->jtag_api == STLINK_JTAG_API_V1) + *val = le_to_h_u32(h->databuf); + else { + *val = le_to_h_u32(h->databuf + 4); + return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL; + } return ERROR_OK; } @@ -871,6 +950,31 @@ static int stlink_usb_write_reg(void *handle, int num, uint32_t val) return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL; } +static int stlink_usb_get_rw_status(void *handle) +{ + int res; + struct stlink_usb_handle_s *h; + + assert(handle != NULL); + + h = (struct stlink_usb_handle_s *)handle; + + if (h->jtag_api == STLINK_JTAG_API_V1) + return ERROR_OK; + + stlink_usb_init_buffer(handle, STLINK_RX_EP, 2); + + h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND; + h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_GETLASTRWSTATUS; + + res = stlink_usb_xfer(handle, h->databuf, 2); + + if (res != ERROR_OK) + return res; + + return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : res; +} + /** */ static int stlink_usb_read_mem8(void *handle, uint32_t addr, uint16_t len, uint8_t *buffer) @@ -903,7 +1007,7 @@ static int stlink_usb_read_mem8(void *handle, uint32_t addr, uint16_t len, memcpy(buffer, h->databuf, len); - return ERROR_OK; + return stlink_usb_get_rw_status(handle); } /** */ @@ -931,7 +1035,7 @@ static int stlink_usb_write_mem8(void *handle, uint32_t addr, uint16_t len, if (res != ERROR_OK) return res; - return ERROR_OK; + return stlink_usb_get_rw_status(handle); } /** */ @@ -963,7 +1067,7 @@ static int stlink_usb_read_mem32(void *handle, uint32_t addr, uint16_t len, memcpy(buffer, h->databuf, len); - return ERROR_OK; + return stlink_usb_get_rw_status(handle); } /** */ @@ -993,7 +1097,7 @@ static int stlink_usb_write_mem32(void *handle, uint32_t addr, uint16_t len, if (res != ERROR_OK) return res; - return ERROR_OK; + return stlink_usb_get_rw_status(handle); } /** */ |