* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include <errno.h>
+#include <config.h>
#include <glib/gstdio.h>
#include <libsigrok/libsigrok.h>
-#include "libsigrok-internal.h"
-#include "protocol.h"
+#include <libsigrok-internal.h>
#include "lwla.h"
+#include "protocol.h"
-#define BITSTREAM_MAX_SIZE (256 * 1024) /* bitstream size limit for safety */
-#define BITSTREAM_HEADER_SIZE 4 /* transfer header size in bytes */
+#define BITSTREAM_MAX_SIZE (256 * 1024) /* Bitstream size limit for safety */
+#define BITSTREAM_HEADER_SIZE 4 /* Transfer header size in bytes */
-/* Load a bitstream file into memory. Returns a newly allocated array
+/* Load a bitstream file into memory. Returns a newly allocated array
* consisting of a 32-bit length field followed by the bitstream data.
*/
-static unsigned char *load_bitstream_file(const char *filename, int *length_p)
+static unsigned char *load_bitstream(struct sr_context *ctx,
+ const char *name, int *length_p)
{
- GStatBuf statbuf;
- FILE *file;
+ struct sr_resource rbf;
unsigned char *stream;
- size_t length, count;
+ ssize_t length, count;
- /* Retrieve and validate the file size. */
- if (g_stat(filename, &statbuf) < 0) {
- sr_err("Failed to access bitstream file: %s.",
- g_strerror(errno));
- return NULL;
- }
- if (!S_ISREG(statbuf.st_mode)) {
- sr_err("Bitstream is not a regular file.");
+ if (sr_resource_open(ctx, &rbf, SR_RESOURCE_FIRMWARE, name) != SR_OK)
return NULL;
- }
- if (statbuf.st_size <= 0 || statbuf.st_size > BITSTREAM_MAX_SIZE) {
+
+ if (rbf.size == 0 || rbf.size > BITSTREAM_MAX_SIZE) {
sr_err("Refusing to load bitstream of unreasonable size "
- "(%" PRIu64 " bytes).", (uint64_t)statbuf.st_size);
+ "(%" PRIu64 " bytes).", rbf.size);
+ sr_resource_close(ctx, &rbf);
return NULL;
}
/* The message length includes the 4-byte header. */
- length = BITSTREAM_HEADER_SIZE + statbuf.st_size;
+ length = BITSTREAM_HEADER_SIZE + rbf.size;
stream = g_try_malloc(length);
if (!stream) {
sr_err("Failed to allocate bitstream buffer.");
- return NULL;
- }
-
- file = g_fopen(filename, "rb");
- if (!file) {
- sr_err("Failed to open bitstream file: %s.", g_strerror(errno));
- g_free(stream);
+ sr_resource_close(ctx, &rbf);
return NULL;
}
/* Write the message length header. */
*(uint32_t *)stream = GUINT32_TO_BE(length);
- count = fread(stream + BITSTREAM_HEADER_SIZE,
- length - BITSTREAM_HEADER_SIZE, 1, file);
- if (count != 1) {
- sr_err("Failed to read bitstream file: %s.", g_strerror(errno));
- fclose(file);
+ count = sr_resource_read(ctx, &rbf, stream + BITSTREAM_HEADER_SIZE,
+ length - BITSTREAM_HEADER_SIZE);
+ sr_resource_close(ctx, &rbf);
+
+ if (count != length - BITSTREAM_HEADER_SIZE) {
+ sr_err("Failed to read bitstream '%s'.", name);
g_free(stream);
return NULL;
}
- fclose(file);
*length_p = length;
return stream;
/* Load a Raw Binary File (.rbf) from the firmware directory and transfer
* it to the device.
*/
-SR_PRIV int lwla_send_bitstream(const struct sr_usb_dev_inst *usb,
- const char *basename)
+SR_PRIV int lwla_send_bitstream(struct sr_context *ctx,
+ const struct sr_usb_dev_inst *usb,
+ const char *name)
{
- char *filename;
unsigned char *stream;
- int ret;
- int length;
- int xfer_len;
+ int ret, length, xfer_len;
- if (!usb || !basename)
+ if (!ctx || !usb || !name)
return SR_ERR_BUG;
- filename = g_build_filename(FIRMWARE_DIR, basename, NULL);
- sr_info("Downloading FPGA bitstream at '%s'.", filename);
-
- stream = load_bitstream_file(filename, &length);
- g_free(filename);
-
+ stream = load_bitstream(ctx, name, &length);
if (!stream)
return SR_ERR;
+ sr_info("Downloading FPGA bitstream '%s'.", name);
+
/* Transfer the entire bitstream in one URB. */
- ret = libusb_bulk_transfer(usb->devhdl, EP_BITSTREAM,
+ ret = libusb_bulk_transfer(usb->devhdl, EP_CONFIG,
stream, length, &xfer_len, USB_TIMEOUT_MS);
g_free(stream);
SR_PRIV int lwla_send_command(const struct sr_usb_dev_inst *usb,
const uint16_t *command, int cmd_len)
{
- int ret;
- int xfer_len;
+ int ret, xfer_len;
if (!usb || !command || cmd_len <= 0)
return SR_ERR_BUG;
LWLA_TO_UINT16(command[0]), xfer_len, cmd_len * 2);
return SR_ERR;
}
+
return SR_OK;
}
SR_PRIV int lwla_receive_reply(const struct sr_usb_dev_inst *usb,
- uint32_t *reply, int reply_len, int expect_len)
+ void *reply, int buf_size, int *xfer_len)
{
int ret;
- int xfer_len;
- if (!usb || !reply || reply_len <= 0)
+ if (!usb || !reply || buf_size <= 0)
return SR_ERR_BUG;
- xfer_len = 0;
- ret = libusb_bulk_transfer(usb->devhdl, EP_REPLY,
- (unsigned char *)reply, reply_len * 4,
- &xfer_len, USB_TIMEOUT_MS);
+ ret = libusb_bulk_transfer(usb->devhdl, EP_REPLY, reply, buf_size,
+ xfer_len, USB_TIMEOUT_MS);
if (ret != 0) {
sr_dbg("Failed to receive reply: %s.", libusb_error_name(ret));
return SR_ERR;
}
- if (xfer_len != expect_len * 4) {
- sr_dbg("Failed to receive reply: incorrect length %d != %d.",
- xfer_len, expect_len * 4);
- return SR_ERR;
- }
+
return SR_OK;
}
SR_PRIV int lwla_read_reg(const struct sr_usb_dev_inst *usb,
uint16_t reg, uint32_t *value)
{
- int ret;
+ int xfer_len, ret;
uint16_t command[2];
- uint32_t reply[128]; /* full EP buffer to avoid overflows */
+ uint32_t reply[128]; /* Full EP buffer to avoid overflows. */
command[0] = LWLA_WORD(CMD_READ_REG);
command[1] = LWLA_WORD(reg);
- ret = lwla_send_command(usb, command, ARRAY_SIZE(command));
-
+ ret = lwla_send_command(usb, ARRAY_AND_SIZE(command));
if (ret != SR_OK)
return ret;
- ret = lwla_receive_reply(usb, reply, ARRAY_SIZE(reply), 1);
+ ret = lwla_receive_reply(usb, reply, sizeof(reply), &xfer_len);
+ if (ret != SR_OK)
+ return ret;
- if (ret == SR_OK)
- *value = LWLA_TO_UINT32(reply[0]);
+ if (xfer_len != 4) {
+ sr_dbg("Invalid register read response of length %d.",
+ xfer_len);
+ return SR_ERR;
+ }
+ *value = LWLA_TO_UINT32(reply[0]);
- return ret;
+ return SR_OK;
}
SR_PRIV int lwla_write_reg(const struct sr_usb_dev_inst *usb,
command[2] = LWLA_WORD_0(value);
command[3] = LWLA_WORD_1(value);
- return lwla_send_command(usb, command, ARRAY_SIZE(command));
+ return lwla_send_command(usb, ARRAY_AND_SIZE(command));
}
SR_PRIV int lwla_write_regs(const struct sr_usb_dev_inst *usb,
- const struct regval_pair *regvals, int count)
+ const struct regval *regvals, int count)
{
- int i;
- int ret;
+ int i, ret;
ret = SR_OK;
- for (i = 0; i < count; ++i) {
+ for (i = 0; i < count; i++) {
ret = lwla_write_reg(usb, regvals[i].reg, regvals[i].val);
if (ret != SR_OK)
projects / libsigrok.git / blobdiff