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protocol.c
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protocol.c
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/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2018 Alyssa Milburn <amilburn@zall.org>
*
* 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 <config.h>
#include "protocol.h"
#define VDS_USB_TIMEOUT 200
// #define VDS_DUMP_OUTPUT
#ifdef VDS_DUMP_OUTPUT
static void hexdump(uint8_t *buffer, int buflen) {
for (int i = 0; i < buflen; ++i)
printf("%02x ", buffer[i]);
}
#endif
static void make_int32(uint8_t *buffer, uint32_t val) {
buffer[0] = val & 0xff;
buffer[1] = (val >> 8) & 0xff;
buffer[2] = (val >> 16) & 0xff;
buffer[3] = (val >> 24) & 0xff;
}
static void make_int16(uint8_t *buffer, uint32_t val) {
buffer[0] = val & 0xff;
buffer[1] = (val >> 8) & 0xff;
}
static int send_bulkcmd(const struct sr_dev_inst *sdi, uint8_t *buffer, int buflen)
{
struct sr_usb_dev_inst *usb;
int ret, tmp;
usb = sdi->conn;
#ifdef VDS_DUMP_OUTPUT
printf("out: ");
hexdump(buffer, buflen);
printf("\n");
#endif
if ((ret = libusb_bulk_transfer(usb->devhdl, VDS_EP_OUT, buffer, buflen, &tmp, VDS_USB_TIMEOUT)) != 0) {
sr_err("Failed to send command: %s.",
libusb_error_name(ret));
return SR_ERR;
}
return SR_OK;
}
static int recv_bulkcmd(const struct sr_dev_inst *sdi, uint8_t *buffer, int buflen)
{
struct sr_usb_dev_inst *usb;
int ret, tmp;
usb = sdi->conn;
if ((ret = libusb_bulk_transfer(usb->devhdl, VDS_EP_IN, buffer, buflen, &tmp, VDS_USB_TIMEOUT)) != 0) {
sr_err("Failed to receive command: %s.",
libusb_error_name(ret));
return SR_ERR;
}
#ifdef VDS_DUMP_OUTPUT
printf("in: ");
hexdump(buffer, buflen);
printf("\n");
#endif
return SR_OK;
}
static int vds_packed_cmd(const struct sr_dev_inst *sdi, uint16_t cmd, uint8_t *cmddata, int cmdlen) {
int ret;
uint8_t buffer[32];
if (cmdlen < 0 || cmdlen > 24)
return SR_ERR;
make_int32(buffer, cmd);
buffer[4] = cmdlen;
memcpy(buffer + 5, cmddata, cmdlen);
if ((ret = send_bulkcmd(sdi, buffer, cmdlen + 5)) != SR_OK)
return SR_ERR;
return SR_OK;
}
static int vds_get_response(const struct sr_dev_inst *sdi, char respcode, uint32_t *response) {
int ret;
uint8_t buffer[5];
if ((ret = recv_bulkcmd(sdi, buffer, 5)) != SR_OK)
return SR_ERR;
*response = buffer[1] | (buffer[2] << 8) | (buffer[3] << 16) | (buffer[4] << 24);
if (buffer[0] != respcode) {
sr_dbg("Expected response %02x (%c), but got %02x (%c) and data %08x\n", respcode, respcode, buffer[0], buffer[0], *response);
return SR_ERR;
}
return SR_OK;
}
static int vds_packed_cmd_response(const struct sr_dev_inst *sdi, uint16_t cmd, uint8_t *cmddata, int cmdlen, char respcode, uint32_t *response) {
int err;
err = vds_packed_cmd(sdi, cmd, cmddata, cmdlen);
if (err)
return err;
return vds_get_response(sdi, respcode, response);
}
static int vds_upload_firmware(struct sr_dev_inst *sdi)
{
struct drv_context *drvc = sdi->driver->context;
struct sr_usb_dev_inst *usb = sdi->conn;
char *firmware;
size_t fw_length;
int err = SR_OK;
uint8_t buffer[64];
uint8_t *large_buffer = NULL;
uint32_t response;
uint32_t buffersize;
uint32_t pos, length;
unsigned int i;
int tmp;
firmware = sr_resource_load(drvc->sr_ctx, SR_RESOURCE_FIRMWARE, "VDS1022_FPGA_V3.5.bin", &fw_length, 0x100000);
if (!firmware)
return SR_ERR;
make_int32(buffer, fw_length);
err = vds_packed_cmd(sdi, 0x4000, buffer, 4);
if (err)
goto done;
err = vds_get_response(sdi, 'D', &response);
if (err)
goto done;
buffersize = response;
sr_dbg("bitstream upload starting, buffer size is %d", buffersize);
if (buffersize <= 4) {
sr_err("buffer size %d is too small", buffersize);
err = SR_ERR;
goto done;
}
large_buffer = malloc(buffersize);
for (i = 0; i < 1 + (fw_length / (buffersize - 4)); ++i) {
// transfer ID
make_int32(large_buffer, i);
pos = i * (buffersize - 4);
length = buffersize - 4;
if (pos + length > fw_length)
length = fw_length - pos;
memcpy(large_buffer + 4, firmware + pos, length);
if ((err = libusb_bulk_transfer(usb->devhdl, VDS_EP_OUT, large_buffer, length+4, &tmp, VDS_USB_TIMEOUT)) != 0)
goto done;
if ((err = vds_get_response(sdi, 'S', &response)) != 0)
goto done;
if (response != i) {
sr_err("bitstream upload: bad response %d", response);
err = SR_ERR;
goto done;
}
}
sr_dbg("bitstream upload done");
done:
g_free(firmware);
g_free(large_buffer);
return err;
}
static int vds_parse_flash(struct sr_dev_inst *sdi, uint8_t *buffer)
{
struct dev_context *devc = sdi->priv;
uint32_t version;
int err, i;
if (buffer[0] != 0xaa || buffer[1] != 0x55) {
sr_err("bad flash header");
return SR_ERR;
}
version = buffer[2] | (buffer[3] << 8) | (buffer[4] << 16) | (buffer[5] << 24);
if (version != 2) {
sr_err("bad flash version %d", version);
return SR_ERR;
}
memcpy(devc->calibration_data, buffer + 6, sizeof(devc->calibration_data));
uint16_t *bb = buffer + 6;
for (int z = 0; z < 3; z++) {
for (int y = 0; y < 2; y++) {
for (int x = 0; x < 10; x++) {
printf("%02x ", *bb++);
}
printf("\n");
}
}
return SR_OK;
}
SR_PRIV int vds_open(struct sr_dev_inst *sdi)
{
struct dev_context *devc = sdi->priv;
struct drv_context *drvc = sdi->driver->context;
struct sr_usb_dev_inst *usb = sdi->conn;
struct libusb_device_descriptor des;
libusb_device **devlist;
int err, i, tmp;
char connection_id[64];
uint8_t buffer[2];
uint8_t *flash_buffer = NULL;
uint32_t response;
libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
for (i = 0; devlist[i]; i++) {
libusb_get_device_descriptor(devlist[i], &des);
if (des.idVendor != devc->profile->vid
|| des.idProduct != devc->profile->pid)
continue;
if ((sdi->status == SR_ST_INITIALIZING) ||
(sdi->status == SR_ST_INACTIVE)) {
/*
* Check device by its physical USB bus/port address.
*/
if (usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)) < 0)
continue;
if (strcmp(sdi->connection_id, connection_id))
/* This is not the one. */
continue;
}
if (!(err = libusb_open(devlist[i], &usb->devhdl))) {
buffer[0] = 0x56;
err = vds_packed_cmd_response(sdi, 0x4001, buffer, 1, 'V', &response);
if (response != 0x1) {
// VDS 1022
sr_err("Wrong machine type %08x", response);
err = SR_ERR;
break;
}
buffer[0] = 0x0;
err = vds_packed_cmd_response(sdi, 0x223, buffer, 1, 'E', &response);
if (err) {
sr_err("Failure during initial handshake");
break;
}
if (response == 0) {
sr_dbg("Need to upload firmware");
err = vds_upload_firmware(sdi);
if (err) {
sr_err("Failed to upload firmware");
break;
}
}
buffer[0] = 0x0;
err = vds_packed_cmd(sdi, 0x1b0, buffer, 1);
if (!err) {
flash_buffer = g_malloc(2002);
err = libusb_bulk_transfer(usb->devhdl, VDS_EP_IN, flash_buffer, 2002, &tmp, VDS_USB_TIMEOUT);
}
if (!err) {
err = vds_parse_flash(sdi, flash_buffer);
}
g_free(flash_buffer);
if (err) {
sr_err("Failed to read flash contents");
break;
}
sdi->status = SR_ST_ACTIVE;
sr_info("Opened device on %d.%d (logical) / "
"%s (physical) interface %d.",
usb->bus, usb->address,
sdi->connection_id, USB_INTERFACE);
} else {
sr_err("Failed to open device: %s.",
libusb_error_name(err));
}
/* If we made it here, we handled the device (somehow). */
break;
}
libusb_free_device_list(devlist, 1);
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR;
return SR_OK;
}
SR_PRIV void vds_close(struct sr_dev_inst *sdi)
{
struct sr_usb_dev_inst *usb;
usb = sdi->conn;
if (!usb->devhdl)
return;
sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
libusb_release_interface(usb->devhdl, USB_INTERFACE);
libusb_close(usb->devhdl);
usb->devhdl = NULL;
sdi->status = SR_ST_INACTIVE;
}
SR_PRIV int vds_init(struct sr_dev_inst *sdi)
{
(void)sdi;
return SR_OK;
}
SR_PRIV int vds_capture_start(struct sr_dev_inst *sdi)
{
struct dev_context *devc = sdi->priv;
int err = 0;
uint8_t buffer[4];
uint32_t response;
uint16_t tmp;
// phase_fine
buffer[0] = 0;
err |= vds_packed_cmd_response(sdi, 0x18, buffer, 1, 'S', &response);
err |= vds_packed_cmd_response(sdi, 0x19, buffer, 1, 'S', &response);
// trg
make_int16(buffer, 0x0);
err |= vds_packed_cmd_response(sdi, 0x24, buffer, 2, 'S', &response);
// trg_holdoff_arg_ch1
buffer[0] = 0;
err |= vds_packed_cmd_response(sdi, 0x26, buffer, 1, 'S', &response);
// trg_holdoff_index_ch1
buffer[0] = 0x41;
err |= vds_packed_cmd_response(sdi, 0x27, buffer, 1, 'S', &response);
// edge_level_ch1
buffer[0] = 0x32;
err |= vds_packed_cmd_response(sdi, 0x2e, buffer, 1, 'S', &response);
buffer[0] = 0x28;
err |= vds_packed_cmd_response(sdi, 0x2f, buffer, 1, 'S', &response);
// chl_on
buffer[0] = 0x3;
err |= vds_packed_cmd_response(sdi, 0xb, buffer, 1, 'S', &response);
// channel_ch1
buffer[0] = 0x80;
err |= vds_packed_cmd_response(sdi, 0x111, buffer, 1, 'S', &response);
// edge_level_ext?
buffer[0] = 0;
err |= vds_packed_cmd_response(sdi, 0x10c, buffer, 1, 'S', &response);
// TODO: here?
// volt_gain_ch1
tmp = devc->calibration_data[GAIN][0][devc->voltage[0]];
make_int16(buffer, tmp);
err |= vds_packed_cmd_response(sdi, 0x116, buffer, 2, 'S', &response);
// zero_off_ch1
// TODO: 50 should be adjustable
tmp = devc->calibration_data[COMPENSATION][0][devc->voltage[0]];
tmp = tmp - (50 * devc->calibration_data[AMPLITUDE][0][devc->voltage[0]] / 100);
make_int16(buffer, tmp);
err |= vds_packed_cmd_response(sdi, 0x10a, buffer, 2, 'S', &response);
// sample
buffer[0] = 0;
err |= vds_packed_cmd_response(sdi, 0x9, buffer, 1, 'S', &response);
// dm (deep mem)
make_int16(buffer, 0x13ec);
err |= vds_packed_cmd_response(sdi, 0x5c, buffer, 2, 'S', &response);
// sync output
buffer[0] = 0;
err |= vds_packed_cmd_response(sdi, 0x6, buffer, 1, 'S', &response);
// timebase
make_int32(buffer, 0x190);
err |= vds_packed_cmd_response(sdi, 0x52, buffer, 4, 'S', &response);
// slowmove
buffer[0] = 0;
err |= vds_packed_cmd_response(sdi, 0xa, buffer, 1, 'S', &response);
// pre_trg
buffer[0] = 0xf1;
err |= vds_packed_cmd_response(sdi, 0x5a, buffer, 1, 'S', &response);
buffer[0] = 0x09;
err |= vds_packed_cmd_response(sdi, 0x5b, buffer, 1, 'S', &response);
// suf_trg
buffer[0] = 0xfb;
err |= vds_packed_cmd_response(sdi, 0x56, buffer, 1, 'S', &response);
buffer[0] = 0x09;
err |= vds_packed_cmd_response(sdi, 0x57, buffer, 1, 'S', &response);
buffer[0] = 0x0;
err |= vds_packed_cmd_response(sdi, 0x58, buffer, 1, 'S', &response);
buffer[0] = 0x0;
err |= vds_packed_cmd_response(sdi, 0x59, buffer, 1, 'S', &response);
// edge_level_ext (again)
buffer[0] = 1;
err |= vds_packed_cmd_response(sdi, 0x10c, buffer, 1, 'S', &response);
if (err != SR_OK)
sr_err("capture start failed");
return err;
}
SR_PRIV int vds_get_data_ready(const struct sr_dev_inst *sdi)
{
uint32_t response;
uint8_t buffer[2];
int err = 0;
// trg_d
buffer[0] = 0x0;
if (!err)
err = vds_packed_cmd_response(sdi, 0x1, buffer, 1, 'S', &response);
// datafinished
buffer[0] = 0x0;
if (!err)
err = vds_packed_cmd_response(sdi, 0x7a, buffer, 1, 'S', &response);
if (err)
return 0;
return response;
}
SR_PRIV int vds_get_data(const struct sr_dev_inst *sdi, libusb_transfer_cb_fn cb)
{
struct sr_usb_dev_inst *usb = sdi->conn;
int err = 0;
int i;
uint8_t buffer[2];
uint8_t *data_buf;
struct libusb_transfer *transfer;
make_int16(buffer, 0x0505);
if (!err)
err = vds_packed_cmd(sdi, 0x1000, buffer, 2);
if (err)
return SR_ERR;
for (i = 0; i < 2; ++i) {
data_buf = g_try_malloc(5200 + 11);
transfer = libusb_alloc_transfer(0);
// TODO: why this timeout
libusb_fill_bulk_transfer(transfer, usb->devhdl, VDS_EP_IN, data_buf,
5200 + 11, cb, (void *)sdi, 400);
if ((err = libusb_submit_transfer(transfer)) != 0) {
sr_err("Failed to submit transfer: %s.", libusb_error_name(err));
/* TODO: Free them all. */
libusb_free_transfer(transfer);
g_free(data_buf);
return SR_ERR;
}
}
return SR_OK;
}
SR_PRIV int vds_receive_data(int fd, int revents, void *cb_data)
{
const struct sr_dev_inst *sdi;
struct dev_context *devc;
(void)fd;
if (!(sdi = cb_data))
return TRUE;
if (!(devc = sdi->priv))
return TRUE;
if (revents == G_IO_IN) {
/* TODO */
}
return TRUE;
}