+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2014 Daniel Elstner <daniel.kitta@gmail.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "lwla.h"
-#include "protocol.h"
-#include "libsigrok-internal.h"
-#include <errno.h>
-#include <glib/gstdio.h>
-
-#define BITSTREAM_MAX_SIZE 262144 /* 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
- * consisting of a 32-bit length field followed by the bitstream data.
- */
-static unsigned char *load_bitstream_file(const char *filename, int *length_p)
-{
- GStatBuf statbuf;
- FILE *file;
- unsigned char *stream;
- size_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.");
- return NULL;
- }
- if (statbuf.st_size <= 0 || statbuf.st_size > BITSTREAM_MAX_SIZE) {
- sr_err("Refusing to load bitstream of unreasonable size "
- "(%" PRIu64 " bytes).", (uint64_t)statbuf.st_size);
- return NULL;
- }
-
- /* The message length includes the 4-byte header. */
- length = BITSTREAM_HEADER_SIZE + statbuf.st_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);
- 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);
- 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)
-{
- char *filename;
- unsigned char *stream;
- int ret;
- int length;
- int xfer_len;
-
- if (!usb || !basename)
- 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);
-
- if (!stream)
- return SR_ERR;
-
- /* Transfer the entire bitstream in one URB. */
- ret = libusb_bulk_transfer(usb->devhdl, EP_BITSTREAM,
- stream, length, &xfer_len, USB_TIMEOUT);
- g_free(stream);
-
- if (ret != 0) {
- sr_err("Failed to transfer bitstream: %s.",
- libusb_error_name(ret));
- return SR_ERR;
- }
- if (xfer_len != length) {
- sr_err("Failed to transfer bitstream: incorrect length "
- "%d != %d.", xfer_len, length);
- return SR_ERR;
- }
- sr_info("FPGA bitstream download of %d bytes done.", xfer_len);
-
- /* This delay appears to be necessary for reliable operation. */
- g_usleep(30000);
-
- return SR_OK;
-}
-
-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;
-
- if (!usb || !command || cmd_len <= 0)
- return SR_ERR_BUG;
-
- xfer_len = 0;
- ret = libusb_bulk_transfer(usb->devhdl, EP_COMMAND,
- (unsigned char *)command, cmd_len * 2,
- &xfer_len, USB_TIMEOUT);
- if (ret != 0) {
- sr_dbg("Failed to send command %d: %s.",
- LWLA_TO_UINT16(command[0]), libusb_error_name(ret));
- return SR_ERR;
- }
- if (xfer_len != cmd_len * 2) {
- sr_dbg("Failed to send command %d: incorrect length %d != %d.",
- 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)
-{
- int ret;
- int xfer_len;
-
- if (!usb || !reply || reply_len <= 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);
- 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;
- uint16_t command[2];
- 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, G_N_ELEMENTS(command));
-
- if (ret != SR_OK)
- return ret;
-
- ret = lwla_receive_reply(usb, reply, G_N_ELEMENTS(reply), 1);
-
- if (ret == SR_OK)
- *value = LWLA_TO_UINT32(reply[0]);
-
- return ret;
-}
-
-SR_PRIV int lwla_write_reg(const struct sr_usb_dev_inst *usb,
- uint16_t reg, uint32_t value)
-{
- uint16_t command[4];
-
- command[0] = LWLA_WORD(CMD_WRITE_REG);
- command[1] = LWLA_WORD(reg);
- command[2] = LWLA_WORD_0(value);
- command[3] = LWLA_WORD_1(value);
-
- return lwla_send_command(usb, command, G_N_ELEMENTS(command));
-}
-
-SR_PRIV int lwla_write_regs(const struct sr_usb_dev_inst *usb,
- const struct regval_pair *regvals, int count)
-{
- int i;
- int ret;
-
- ret = SR_OK;
-
- for (i = 0; i < count; ++i) {
- ret = lwla_write_reg(usb, regvals[i].reg, regvals[i].val);
-
- if (ret != SR_OK)
- break;
- }
-
- return ret;
-}
projects / libsigrok.git / blobdiff