aboutsummaryrefslogtreecommitdiff
path: root/src/jtag/drivers/stlink_usb.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/jtag/drivers/stlink_usb.c')
-rw-r--r--src/jtag/drivers/stlink_usb.c184
1 files changed, 168 insertions, 16 deletions
diff --git a/src/jtag/drivers/stlink_usb.c b/src/jtag/drivers/stlink_usb.c
index 4154b93c..31f08cbb 100644
--- a/src/jtag/drivers/stlink_usb.c
+++ b/src/jtag/drivers/stlink_usb.c
@@ -50,10 +50,14 @@
#define STLINK_TX_EP (2|ENDPOINT_OUT)
#define STLINK_TRACE_EP (3|ENDPOINT_IN)
#define STLINK_SG_SIZE (31)
-#define STLINK_DATA_SIZE (4*128)
+#define STLINK_DATA_SIZE (4096)
#define STLINK_CMD_SIZE_V2 (16)
#define STLINK_CMD_SIZE_V1 (10)
+/* the current implementation of the stlink limits
+ * 8bit read/writes to max 64 bytes. */
+#define STLINK_MAX_RW8 (64)
+
enum stlink_jtag_api_version {
STLINK_JTAG_API_V1 = 1,
STLINK_JTAG_API_V2,
@@ -86,6 +90,8 @@ struct stlink_usb_handle_s {
/** */
uint8_t databuf[STLINK_DATA_SIZE];
/** */
+ uint32_t max_mem_packet;
+ /** */
enum hl_transports transport;
/** */
struct stlink_usb_version version;
@@ -1317,6 +1323,12 @@ static int stlink_usb_read_mem8(void *handle, uint32_t addr, uint16_t len,
assert(handle != NULL);
+ /* max 8bit read/write is 64bytes */
+ if (len > STLINK_MAX_RW8) {
+ LOG_DEBUG("max buffer length exceeded");
+ return ERROR_FAIL;
+ }
+
h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_RX_EP, read_len);
@@ -1351,6 +1363,12 @@ static int stlink_usb_write_mem8(void *handle, uint32_t addr, uint16_t len,
assert(handle != NULL);
+ /* max 8bit read/write is 64bytes */
+ if (len > STLINK_MAX_RW8) {
+ LOG_DEBUG("max buffer length exceeded");
+ return ERROR_FAIL;
+ }
+
h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_TX_EP, len);
@@ -1379,9 +1397,13 @@ static int stlink_usb_read_mem32(void *handle, uint32_t addr, uint16_t len,
assert(handle != NULL);
- h = (struct stlink_usb_handle_s *)handle;
+ /* data must be a multiple of 4 and word aligned */
+ if (len % 4 || addr % 4) {
+ LOG_DEBUG("Invalid data alignment");
+ return ERROR_TARGET_UNALIGNED_ACCESS;
+ }
- len *= 4;
+ h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_RX_EP, len);
@@ -1411,9 +1433,13 @@ static int stlink_usb_write_mem32(void *handle, uint32_t addr, uint16_t len,
assert(handle != NULL);
- h = (struct stlink_usb_handle_s *)handle;
+ /* data must be a multiple of 4 and word aligned */
+ if (len % 4 || addr % 4) {
+ LOG_DEBUG("Invalid data alignment");
+ return ERROR_TARGET_UNALIGNED_ACCESS;
+ }
- len *= 4;
+ h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_TX_EP, len);
@@ -1432,22 +1458,134 @@ static int stlink_usb_write_mem32(void *handle, uint32_t addr, uint16_t len,
return stlink_usb_get_rw_status(handle);
}
+static uint32_t stlink_max_block_size(uint32_t tar_autoincr_block, uint32_t address)
+{
+ uint32_t max_tar_block = (tar_autoincr_block - ((tar_autoincr_block - 1) & address));
+ if (max_tar_block == 0)
+ max_tar_block = 4;
+ return max_tar_block;
+}
+
static int stlink_usb_read_mem(void *handle, uint32_t addr, uint32_t size,
uint32_t count, uint8_t *buffer)
{
- if (size == 4)
- return stlink_usb_read_mem32(handle, addr, count, buffer);
- else
- return stlink_usb_read_mem8(handle, addr, count, buffer);
+ int retval = ERROR_OK;
+ uint32_t bytes_remaining;
+ struct stlink_usb_handle_s *h = (struct stlink_usb_handle_s *)handle;
+
+ /* calculate byte count */
+ count *= size;
+
+ while (count) {
+
+ bytes_remaining = (size == 4) ? \
+ stlink_max_block_size(h->max_mem_packet, addr) : STLINK_MAX_RW8;
+
+ if (count < bytes_remaining)
+ bytes_remaining = count;
+
+ /* the stlink only supports 8/32bit memory read/writes
+ * honour 32bit, all others will be handled as 8bit access */
+ if (size == 4) {
+
+ /* When in jtag mode the stlink uses the auto-increment functinality.
+ * However it expects us to pass the data correctly, this includes
+ * alignment and any page boundaries. We already do this as part of the
+ * adi_v5 implementation, but the stlink is a hla adapter and so this
+ * needs implementiong manually.
+ * currently this only affects jtag mode, according to ST they do single
+ * access in SWD mode - but this may change and so we do it for both modes */
+
+ /* we first need to check for any unaligned bytes */
+ if (addr % 4) {
+
+ uint32_t head_bytes = 4 - (addr % 4);
+ retval = stlink_usb_read_mem8(handle, addr, head_bytes, buffer);
+ if (retval != ERROR_OK)
+ return retval;
+ buffer += head_bytes;
+ addr += head_bytes;
+ count -= head_bytes;
+ bytes_remaining -= head_bytes;
+ }
+
+ if (bytes_remaining % 4)
+ retval = stlink_usb_read_mem(handle, addr, 1, bytes_remaining, buffer);
+ else
+ retval = stlink_usb_read_mem32(handle, addr, bytes_remaining, buffer);
+ } else
+ retval = stlink_usb_read_mem8(handle, addr, bytes_remaining, buffer);
+
+ if (retval != ERROR_OK)
+ return retval;
+
+ buffer += bytes_remaining;
+ addr += bytes_remaining;
+ count -= bytes_remaining;
+ }
+
+ return retval;
}
static int stlink_usb_write_mem(void *handle, uint32_t addr, uint32_t size,
uint32_t count, const uint8_t *buffer)
{
- if (size == 4)
- return stlink_usb_write_mem32(handle, addr, count, buffer);
- else
- return stlink_usb_write_mem8(handle, addr, count, buffer);
+ int retval = ERROR_OK;
+ uint32_t bytes_remaining;
+ struct stlink_usb_handle_s *h = (struct stlink_usb_handle_s *)handle;
+
+ /* calculate byte count */
+ count *= size;
+
+ while (count) {
+
+ bytes_remaining = (size == 4) ? \
+ stlink_max_block_size(h->max_mem_packet, addr) : STLINK_MAX_RW8;
+
+ if (count < bytes_remaining)
+ bytes_remaining = count;
+
+ /* the stlink only supports 8/32bit memory read/writes
+ * honour 32bit, all others will be handled as 8bit access */
+ if (size == 4) {
+
+ /* When in jtag mode the stlink uses the auto-increment functinality.
+ * However it expects us to pass the data correctly, this includes
+ * alignment and any page boundaries. We already do this as part of the
+ * adi_v5 implementation, but the stlink is a hla adapter and so this
+ * needs implementiong manually.
+ * currently this only affects jtag mode, according to ST they do single
+ * access in SWD mode - but this may change and so we do it for both modes */
+
+ /* we first need to check for any unaligned bytes */
+ if (addr % 4) {
+
+ uint32_t head_bytes = 4 - (addr % 4);
+ retval = stlink_usb_write_mem8(handle, addr, head_bytes, buffer);
+ if (retval != ERROR_OK)
+ return retval;
+ buffer += head_bytes;
+ addr += head_bytes;
+ count -= head_bytes;
+ bytes_remaining -= head_bytes;
+ }
+
+ if (bytes_remaining % 4)
+ retval = stlink_usb_write_mem(handle, addr, 1, bytes_remaining, buffer);
+ else
+ retval = stlink_usb_write_mem32(handle, addr, bytes_remaining, buffer);
+
+ } else
+ retval = stlink_usb_write_mem8(handle, addr, bytes_remaining, buffer);
+ if (retval != ERROR_OK)
+ return retval;
+
+ buffer += bytes_remaining;
+ addr += bytes_remaining;
+ count -= bytes_remaining;
+ }
+
+ return retval;
}
/** */
@@ -1483,9 +1621,6 @@ static int stlink_usb_open(struct hl_interface_param_s *param, void **fd)
h->transport = param->transport;
- /* set max read/write buffer size in bytes */
- param->max_buffer = 512;
-
const uint16_t vids[] = { param->vid, 0 };
const uint16_t pids[] = { param->pid, 0 };
@@ -1616,6 +1751,23 @@ static int stlink_usb_open(struct hl_interface_param_s *param, void **fd)
goto error_open;
}
+ /* get cpuid, so we can determine the max page size
+ * start with a safe default */
+ h->max_mem_packet = (1 << 10);
+
+ uint8_t buffer[4];
+ err = stlink_usb_read_mem32(h, CPUID, 4, buffer);
+ if (err == ERROR_OK) {
+ uint32_t cpuid = le_to_h_u32(buffer);
+ int i = (cpuid >> 4) & 0xf;
+ if (i == 4 || i == 3) {
+ /* Cortex-M3/M4 has 4096 bytes autoincrement range */
+ h->max_mem_packet = (1 << 12);
+ }
+ }
+
+ LOG_DEBUG("Using TAR autoincrement: %" PRIu32, h->max_mem_packet);
+
*fd = h;
return ERROR_OK;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-10-19 11:56:53 +0000