/*
* This file is part of the sigrok project.
*
+ * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
* Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
*
* This program is free software: you can redistribute it and/or modify
#include <stdio.h>
#include <stdlib.h>
-
-#include "config.h"
-#include "sigrok.h"
-#include "sigrok-internal.h"
+#include <string.h>
+#include <inttypes.h>
+#include <libusb.h>
+#include "libsigrok.h"
+#include "libsigrok-internal.h"
#include "fx2lafw.h"
+#include "command.h"
+
+static const struct fx2lafw_profile supported_fx2[] = {
+ /*
+ * CWAV USBee AX
+ * EE Electronics ESLA201A
+ * ARMFLY AX-Pro
+ */
+ { 0x08a9, 0x0014, "CWAV", "USBee AX", NULL,
+ FIRMWARE_DIR "/fx2lafw-cwav-usbeeax.fw",
+ 0 },
+ /*
+ * CWAV USBee DX
+ * XZL-Studio DX
+ */
+ { 0x08a9, 0x0015, "CWAV", "USBee DX", NULL,
+ FIRMWARE_DIR "/fx2lafw-cwav-usbeedx.fw",
+ DEV_CAPS_16BIT },
+
+ /*
+ * CWAV USBee SX
+ */
+ { 0x08a9, 0x0009, "CWAV", "USBee SX", NULL,
+ FIRMWARE_DIR "/fx2lafw-cwav-usbeesx.fw",
+ 0 },
+
+ /*
+ * Saleae Logic
+ * EE Electronics ESLA100
+ * Robomotic MiniLogic
+ * Robomotic BugLogic 3
+ */
+ { 0x0925, 0x3881, "Saleae", "Logic", NULL,
+ FIRMWARE_DIR "/fx2lafw-saleae-logic.fw",
+ 0 },
+
+ /*
+ * Default Cypress FX2 without EEPROM, e.g.:
+ * Lcsoft Mini Board
+ * Braintechnology USB Interface V2.x
+ */
+ { 0x04B4, 0x8613, "Cypress", "FX2", NULL,
+ FIRMWARE_DIR "/fx2lafw-cypress-fx2.fw",
+ DEV_CAPS_16BIT },
+
+ /*
+ * Braintechnology USB-LPS
+ */
+ { 0x16d0, 0x0498, "Braintechnology", "USB-LPS", NULL,
+ FIRMWARE_DIR "/fx2lafw-braintechnology-usb-lps.fw",
+ DEV_CAPS_16BIT },
+
+ { 0, 0, 0, 0, 0, 0, 0 }
+};
+
+static const int hwcaps[] = {
+ SR_HWCAP_LOGIC_ANALYZER,
+ SR_HWCAP_SAMPLERATE,
+
+ /* These are really implemented in the driver, not the hardware. */
+ SR_HWCAP_LIMIT_SAMPLES,
+ SR_HWCAP_CONTINUOUS,
+ 0,
+};
+
+static const char *probe_names[] = {
+ "0",
+ "1",
+ "2",
+ "3",
+ "4",
+ "5",
+ "6",
+ "7",
+ "8",
+ "9",
+ "10",
+ "11",
+ "12",
+ "13",
+ "14",
+ "15",
+ NULL,
+};
+
+static const uint64_t supported_samplerates[] = {
+ SR_KHZ(20),
+ SR_KHZ(25),
+ SR_KHZ(50),
+ SR_KHZ(100),
+ SR_KHZ(200),
+ SR_KHZ(250),
+ SR_KHZ(500),
+ SR_MHZ(1),
+ SR_MHZ(2),
+ SR_MHZ(3),
+ SR_MHZ(4),
+ SR_MHZ(6),
+ SR_MHZ(8),
+ SR_MHZ(12),
+ SR_MHZ(16),
+ SR_MHZ(24),
+ 0,
+};
+
+static const struct sr_samplerates samplerates = {
+ 0,
+ 0,
+ 0,
+ supported_samplerates,
+};
+
+SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
+static struct sr_dev_driver *fdi = &fx2lafw_driver_info;
+static int hw_dev_close(struct sr_dev_inst *sdi);
+static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
+ const void *value);
+static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
+
+/**
+ * Check the USB configuration to determine if this is an fx2lafw device.
+ *
+ * @return TRUE if the device's configuration profile match fx2lafw
+ * configuration, FALSE otherwise.
+ */
+static gboolean check_conf_profile(libusb_device *dev)
+{
+ struct libusb_device_descriptor des;
+ struct libusb_device_handle *hdl;
+ gboolean ret;
+ unsigned char strdesc[64];
+
+ hdl = NULL;
+ ret = FALSE;
+ while (!ret) {
+ /* Assume the FW has not been loaded, unless proven wrong. */
+ if (libusb_get_device_descriptor(dev, &des) != 0)
+ break;
+
+ if (libusb_open(dev, &hdl) != 0)
+ break;
+
+ if (libusb_get_string_descriptor_ascii(hdl,
+ des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
+ break;
+ if (strncmp((const char *)strdesc, "sigrok", 6))
+ break;
+
+ if (libusb_get_string_descriptor_ascii(hdl,
+ des.iProduct, strdesc, sizeof(strdesc)) < 0)
+ break;
+ if (strncmp((const char *)strdesc, "fx2lafw", 7))
+ break;
+
+ /* If we made it here, it must be an fx2lafw. */
+ ret = TRUE;
+ }
+ if (hdl)
+ libusb_close(hdl);
+
+ return ret;
+}
+
+static int fx2lafw_dev_open(struct sr_dev_inst *sdi)
+{
+ libusb_device **devlist;
+ struct libusb_device_descriptor des;
+ struct dev_context *devc;
+ struct drv_context *drvc = fdi->priv;
+ struct version_info vi;
+ int ret, skip, i;
+ uint8_t revid;
+
+ devc = sdi->priv;
+
+ if (sdi->status == SR_ST_ACTIVE)
+ /* already in use */
+ return SR_ERR;
+
+ skip = 0;
+ const int device_count = libusb_get_device_list(
+ drvc->sr_ctx->libusb_ctx, &devlist);
+ if (device_count < 0) {
+ sr_err("fx2lafw: Failed to retrieve device list (%d)",
+ device_count);
+ return SR_ERR;
+ }
+
+ for (i = 0; i < device_count; i++) {
+ if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
+ sr_err("fx2lafw: Failed to get device descriptor: %s.",
+ libusb_error_name(ret));
+ continue;
+ }
+
+ if (des.idVendor != devc->profile->vid
+ || des.idProduct != devc->profile->pid)
+ continue;
+
+ if (sdi->status == SR_ST_INITIALIZING) {
+ if (skip != sdi->index) {
+ /* Skip devices of this type that aren't the one we want. */
+ skip += 1;
+ continue;
+ }
+ } else if (sdi->status == SR_ST_INACTIVE) {
+ /*
+ * This device is fully enumerated, so we need to find
+ * this device by vendor, product, bus and address.
+ */
+ if (libusb_get_bus_number(devlist[i]) != devc->usb->bus
+ || libusb_get_device_address(devlist[i]) != devc->usb->address)
+ /* this is not the one */
+ continue;
+ }
+
+ if (!(ret = libusb_open(devlist[i], &devc->usb->devhdl))) {
+ if (devc->usb->address == 0xff)
+ /*
+ * first time we touch this device after firmware upload,
+ * so we don't know the address yet.
+ */
+ devc->usb->address = libusb_get_device_address(devlist[i]);
+ } else {
+ sr_err("fx2lafw: Failed to open device: %s.",
+ libusb_error_name(ret));
+ break;
+ }
+
+ ret = command_get_fw_version(devc->usb->devhdl, &vi);
+ if (ret != SR_OK) {
+ sr_err("fx2lafw: Failed to retrieve "
+ "firmware version information.");
+ break;
+ }
+
+ ret = command_get_revid_version(devc->usb->devhdl, &revid);
+ if (ret != SR_OK) {
+ sr_err("fx2lafw: Failed to retrieve REVID.");
+ break;
+ }
+
+ /*
+ * Changes in major version mean incompatible/API changes, so
+ * bail out if we encounter an incompatible version.
+ * Different minor versions are OK, they should be compatible.
+ */
+ if (vi.major != FX2LAFW_REQUIRED_VERSION_MAJOR) {
+ sr_err("fx2lafw: Expected firmware version %d.x, "
+ "got %d.%d.", FX2LAFW_REQUIRED_VERSION_MAJOR,
+ vi.major, vi.minor);
+ break;
+ }
+
+ sdi->status = SR_ST_ACTIVE;
+ sr_info("fx2lafw: Opened device %d on %d.%d "
+ "interface %d, firmware %d.%d, REVID %d.",
+ sdi->index, devc->usb->bus, devc->usb->address,
+ USB_INTERFACE, vi.major, vi.minor, revid);
+
+ break;
+ }
+ libusb_free_device_list(devlist, 1);
+
+ if (sdi->status != SR_ST_ACTIVE)
+ return SR_ERR;
+
+ return SR_OK;
+}
+
+static int configure_probes(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ struct sr_probe *probe;
+ GSList *l;
+ int probe_bit, stage, i;
+ char *tc;
+
+ devc = sdi->priv;
+ for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
+ devc->trigger_mask[i] = 0;
+ devc->trigger_value[i] = 0;
+ }
+
+ stage = -1;
+ for (l = sdi->probes; l; l = l->next) {
+ probe = (struct sr_probe *)l->data;
+ if (probe->enabled == FALSE)
+ continue;
+
+ if (probe->index > 7)
+ devc->sample_wide = TRUE;
+
+ probe_bit = 1 << (probe->index);
+ if (!(probe->trigger))
+ continue;
+
+ stage = 0;
+ for (tc = probe->trigger; *tc; tc++) {
+ devc->trigger_mask[stage] |= probe_bit;
+ if (*tc == '1')
+ devc->trigger_value[stage] |= probe_bit;
+ stage++;
+ if (stage > NUM_TRIGGER_STAGES)
+ return SR_ERR;
+ }
+ }
+
+ if (stage == -1)
+ /*
+ * We didn't configure any triggers, make sure acquisition
+ * doesn't wait for any.
+ */
+ devc->trigger_stage = TRIGGER_FIRED;
+ else
+ devc->trigger_stage = 0;
+
+ return SR_OK;
+}
+
+static struct dev_context *fx2lafw_dev_new(void)
+{
+ struct dev_context *devc;
+
+ if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
+ sr_err("fx2lafw: %s: devc malloc failed.", __func__);
+ return NULL;
+ }
+
+ devc->trigger_stage = TRIGGER_FIRED;
+
+ return devc;
+}
+
+static int clear_instances(void)
+{
+ GSList *l;
+ struct sr_dev_inst *sdi;
+ struct drv_context *drvc;
+ struct dev_context *devc;
+ int ret;
+
+ drvc = fdi->priv;
+ ret = SR_OK;
+ for (l = drvc->instances; l; l = l->next) {
+ if (!(sdi = l->data)) {
+ /* Log error, but continue cleaning up the rest. */
+ sr_err("fx2lafw: %s: sdi was NULL, continuing.",
+ __func__);
+ ret = SR_ERR_BUG;
+ continue;
+ }
+ if (!(devc = sdi->priv)) {
+ /* Log error, but continue cleaning up the rest. */
+ sr_err("fx2lafw: %s: sdi->priv was NULL, continuing",
+ __func__);
+ ret = SR_ERR_BUG;
+ continue;
+ }
+ hw_dev_close(sdi);
+ sr_usb_dev_inst_free(devc->usb);
+ sdi = l->data;
+ sr_dev_inst_free(sdi);
+ }
+
+ g_slist_free(drvc->instances);
+ drvc->instances = NULL;
+
+ return ret;
+}
/*
* API callbacks
*/
-static int hw_init(const char *deviceinfo)
+static int hw_init(struct sr_context *sr_ctx)
+{
+ struct drv_context *drvc;
+
+ if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
+ sr_err("fx2lafw: driver context malloc failed.");
+ return SR_ERR_MALLOC;
+ }
+
+ drvc->sr_ctx = sr_ctx;
+ fdi->priv = drvc;
+
+ return SR_OK;
+}
+
+static GSList *hw_scan(GSList *options)
+{
+ GSList *devices;
+ struct libusb_device_descriptor des;
+ struct sr_dev_inst *sdi;
+ const struct fx2lafw_profile *prof;
+ struct drv_context *drvc;
+ struct dev_context *devc;
+ struct sr_probe *probe;
+ libusb_device **devlist;
+ int devcnt, num_logic_probes, ret, i, j;
+
+ (void)options;
+
+ drvc = fdi->priv;
+
+ /* This scan always invalidates any previous scans. */
+ clear_instances();
+
+ /* Find all fx2lafw compatible devices and upload firmware to them. */
+ devices = NULL;
+ libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
+ for (i = 0; devlist[i]; i++) {
+
+ if ((ret = libusb_get_device_descriptor(
+ devlist[i], &des)) != 0) {
+ sr_warn("fx2lafw: Failed to get device descriptor: %s.",
+ libusb_error_name(ret));
+ continue;
+ }
+
+ prof = NULL;
+ for (j = 0; supported_fx2[j].vid; j++) {
+ if (des.idVendor == supported_fx2[j].vid &&
+ des.idProduct == supported_fx2[j].pid) {
+ prof = &supported_fx2[j];
+ }
+ }
+
+ /* Skip if the device was not found */
+ if (!prof)
+ continue;
+
+ devcnt = g_slist_length(drvc->instances);
+ sdi = sr_dev_inst_new(devcnt, SR_ST_INITIALIZING,
+ prof->vendor, prof->model, prof->model_version);
+ if (!sdi)
+ return NULL;
+ sdi->driver = fdi;
+
+ /* Fill in probelist according to this device's profile. */
+ num_logic_probes = prof->dev_caps & DEV_CAPS_16BIT ? 16 : 8;
+ for (j = 0; j < num_logic_probes; j++) {
+ if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE,
+ probe_names[j])))
+ return NULL;
+ sdi->probes = g_slist_append(sdi->probes, probe);
+ }
+
+ devc = fx2lafw_dev_new();
+ devc->profile = prof;
+ sdi->priv = devc;
+ drvc->instances = g_slist_append(drvc->instances, sdi);
+ devices = g_slist_append(devices, sdi);
+
+ if (check_conf_profile(devlist[i])) {
+ /* Already has the firmware, so fix the new address. */
+ sr_dbg("fx2lafw: Found an fx2lafw device.");
+ sdi->status = SR_ST_INACTIVE;
+ devc->usb = sr_usb_dev_inst_new
+ (libusb_get_bus_number(devlist[i]),
+ libusb_get_device_address(devlist[i]), NULL);
+ } else {
+ if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
+ prof->firmware) == SR_OK)
+ /* Remember when the firmware on this device was updated */
+ devc->fw_updated = g_get_monotonic_time();
+ else
+ sr_err("fx2lafw: Firmware upload failed for "
+ "device %d.", devcnt);
+ devc->usb = sr_usb_dev_inst_new
+ (libusb_get_bus_number(devlist[i]), 0xff, NULL);
+ }
+ }
+ libusb_free_device_list(devlist, 1);
+
+ return devices;
+}
+
+static GSList *hw_dev_list(void)
{
- (void)deviceinfo;
- return 0;
+ struct drv_context *drvc;
+
+ drvc = fdi->priv;
+
+ return drvc->instances;
}
-static int hw_dev_open(int device_index)
+static int hw_dev_open(struct sr_dev_inst *sdi)
{
- (void)device_index;
+ struct dev_context *devc;
+ int ret;
+ int64_t timediff_us, timediff_ms;
+
+ devc = sdi->priv;
+
+ /*
+ * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
+ * milliseconds for the FX2 to renumerate.
+ */
+ ret = SR_ERR;
+ if (devc->fw_updated > 0) {
+ sr_info("fx2lafw: Waiting for device to reset.");
+ /* takes at least 300ms for the FX2 to be gone from the USB bus */
+ g_usleep(300 * 1000);
+ timediff_ms = 0;
+ while (timediff_ms < MAX_RENUM_DELAY_MS) {
+ if ((ret = fx2lafw_dev_open(sdi)) == SR_OK)
+ break;
+ g_usleep(100 * 1000);
+
+ timediff_us = g_get_monotonic_time() - devc->fw_updated;
+ timediff_ms = timediff_us / 1000;
+ sr_spew("fx2lafw: waited %" PRIi64 " ms", timediff_ms);
+ }
+ } else {
+ ret = fx2lafw_dev_open(sdi);
+ }
+
+ if (ret != SR_OK) {
+ sr_err("fx2lafw: Unable to open device.");
+ return SR_ERR;
+ } else {
+ sr_info("fx2lafw: Device came back after %d ms.",
+ timediff_ms);
+ }
+
+ devc = sdi->priv;
+
+ ret = libusb_claim_interface(devc->usb->devhdl, USB_INTERFACE);
+ if (ret != 0) {
+ switch(ret) {
+ case LIBUSB_ERROR_BUSY:
+ sr_err("fx2lafw: Unable to claim USB interface. Another "
+ "program or driver has already claimed it.");
+ break;
+
+ case LIBUSB_ERROR_NO_DEVICE:
+ sr_err("fx2lafw: Device has been disconnected.");
+ break;
+
+ default:
+ sr_err("fx2lafw: Unable to claim interface: %s.",
+ libusb_error_name(ret));
+ break;
+ }
+
+ return SR_ERR;
+ }
+
+ if (devc->cur_samplerate == 0) {
+ /* Samplerate hasn't been set; default to the slowest one. */
+ if (hw_dev_config_set(sdi, SR_HWCAP_SAMPLERATE,
+ &supported_samplerates[0]) == SR_ERR)
+ return SR_ERR;
+ }
+
return SR_OK;
}
-static int hw_dev_close(int device_index)
+static int hw_dev_close(struct sr_dev_inst *sdi)
{
- (void)device_index;
+ struct dev_context *devc;
+
+ devc = sdi->priv;
+ if (devc->usb->devhdl == NULL)
+ return SR_ERR;
+
+ sr_info("fx2lafw: Closing device %d on %d.%d interface %d.",
+ sdi->index, devc->usb->bus, devc->usb->address, USB_INTERFACE);
+ libusb_release_interface(devc->usb->devhdl, USB_INTERFACE);
+ libusb_close(devc->usb->devhdl);
+ devc->usb->devhdl = NULL;
+ sdi->status = SR_ST_INACTIVE;
+
return SR_OK;
}
static int hw_cleanup(void)
{
+ struct drv_context *drvc;
+ int ret;
+
+ if (!(drvc = fdi->priv))
+ return SR_OK;
+
+ ret = clear_instances();
+
+ g_free(drvc);
+ fdi->priv = NULL;
+
+ return ret;
+}
+
+static int hw_info_get(int info_id, const void **data,
+ const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+
+ switch (info_id) {
+ case SR_DI_HWCAPS:
+ *data = hwcaps;
+ break;
+ case SR_DI_NUM_PROBES:
+ if (sdi) {
+ devc = sdi->priv;
+ *data = GINT_TO_POINTER(
+ (devc->profile->dev_caps & DEV_CAPS_16BIT) ?
+ 16 : 8);
+ } else
+ return SR_ERR;
+ break;
+ case SR_DI_PROBE_NAMES:
+ *data = probe_names;
+ break;
+ case SR_DI_SAMPLERATES:
+ *data = &samplerates;
+ break;
+ case SR_DI_TRIGGER_TYPES:
+ *data = TRIGGER_TYPES;
+ break;
+ case SR_DI_CUR_SAMPLERATE:
+ if (sdi) {
+ devc = sdi->priv;
+ *data = &devc->cur_samplerate;
+ } else
+ return SR_ERR;
+ break;
+ default:
+ return SR_ERR_ARG;
+ }
+
return SR_OK;
}
-static void *hw_dev_info_get(int device_index, int device_info_id)
+static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
+ const void *value)
+{
+ struct dev_context *devc;
+ int ret;
+
+ devc = sdi->priv;
+
+ if (hwcap == SR_HWCAP_SAMPLERATE) {
+ devc->cur_samplerate = *(const uint64_t *)value;
+ ret = SR_OK;
+ } else if (hwcap == SR_HWCAP_LIMIT_SAMPLES) {
+ devc->limit_samples = *(const uint64_t *)value;
+ ret = SR_OK;
+ } else {
+ ret = SR_ERR;
+ }
+
+ return ret;
+}
+
+static int receive_data(int fd, int revents, void *cb_data)
+{
+ struct timeval tv;
+ struct drv_context *drvc = fdi->priv;
+
+ (void)fd;
+ (void)revents;
+ (void)cb_data;
+
+ tv.tv_sec = tv.tv_usec = 0;
+ libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
+
+ return TRUE;
+}
+
+static void abort_acquisition(struct dev_context *devc)
{
- (void)device_index;
- (void)device_info_id;
- return NULL;
+ int i;
+
+ devc->num_samples = -1;
+
+ for (i = devc->num_transfers - 1; i >= 0; i--) {
+ if (devc->transfers[i])
+ libusb_cancel_transfer(devc->transfers[i]);
+ }
}
-static int hw_dev_status_get(int device_index)
+static void finish_acquisition(struct dev_context *devc)
{
- (void)device_index;
- return SR_ST_NOT_FOUND;
+ struct sr_datafeed_packet packet;
+ struct drv_context *drvc = fdi->priv;
+ int i;
+
+
+ /* Terminate session */
+ packet.type = SR_DF_END;
+ sr_session_send(devc->session_dev_id, &packet);
+
+ /* Remove fds from polling */
+ const struct libusb_pollfd **const lupfd =
+ libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
+ for (i = 0; lupfd[i]; i++)
+ sr_source_remove(lupfd[i]->fd);
+ free(lupfd); /* NOT g_free()! */
+
+ devc->num_transfers = 0;
+ g_free(devc->transfers);
}
-static int *hw_hwcap_get_all(void)
+static void free_transfer(struct libusb_transfer *transfer)
{
- return NULL;
+ struct dev_context *devc = transfer->user_data;
+ unsigned int i;
+
+ g_free(transfer->buffer);
+ transfer->buffer = NULL;
+ libusb_free_transfer(transfer);
+
+ for (i = 0; i < devc->num_transfers; i++) {
+ if (devc->transfers[i] == transfer) {
+ devc->transfers[i] = NULL;
+ break;
+ }
+ }
+
+ devc->submitted_transfers--;
+ if (devc->submitted_transfers == 0)
+ finish_acquisition(devc);
+
}
-static int hw_dev_config_set(int dev_index, int capability, void *value)
+static void resubmit_transfer(struct libusb_transfer *transfer)
{
- (void)dev_index;
- (void)capability;
- (void)value;
- return SR_OK;
+ int ret = libusb_submit_transfer(transfer);
+
+ if (LIBUSB_SUCCESS == ret)
+ return;
+
+ free_transfer(transfer);
+ /* TODO: Stop session? */
+
+ sr_err("fx2lafw: %s: %s", __func__, libusb_error_name(ret));
+}
+
+static void receive_transfer(struct libusb_transfer *transfer)
+{
+ gboolean packet_has_error = FALSE;
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_logic logic;
+ struct dev_context *devc = transfer->user_data;
+ int trigger_offset, i;
+
+ /*
+ * If acquisition has already ended, just free any queued up
+ * transfer that come in.
+ */
+ if (devc->num_samples == -1) {
+ free_transfer(transfer);
+ return;
+ }
+
+ sr_info("fx2lafw: receive_transfer(): status %d received %d bytes.",
+ transfer->status, transfer->actual_length);
+
+ /* Save incoming transfer before reusing the transfer struct. */
+ uint8_t *const cur_buf = transfer->buffer;
+ const int sample_width = devc->sample_wide ? 2 : 1;
+ const int cur_sample_count = transfer->actual_length / sample_width;
+
+ switch (transfer->status) {
+ case LIBUSB_TRANSFER_NO_DEVICE:
+ abort_acquisition(devc);
+ free_transfer(transfer);
+ return;
+ case LIBUSB_TRANSFER_COMPLETED:
+ case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though */
+ break;
+ default:
+ packet_has_error = TRUE;
+ break;
+ }
+
+ if (transfer->actual_length == 0 || packet_has_error) {
+ devc->empty_transfer_count++;
+ if (devc->empty_transfer_count > MAX_EMPTY_TRANSFERS) {
+ /*
+ * The FX2 gave up. End the acquisition, the frontend
+ * will work out that the samplecount is short.
+ */
+ abort_acquisition(devc);
+ free_transfer(transfer);
+ } else {
+ resubmit_transfer(transfer);
+ }
+ return;
+ } else {
+ devc->empty_transfer_count = 0;
+ }
+
+ trigger_offset = 0;
+ if (devc->trigger_stage >= 0) {
+ for (i = 0; i < cur_sample_count; i++) {
+
+ const uint16_t cur_sample = devc->sample_wide ?
+ *((const uint16_t*)cur_buf + i) :
+ *((const uint8_t*)cur_buf + i);
+
+ if ((cur_sample & devc->trigger_mask[devc->trigger_stage]) ==
+ devc->trigger_value[devc->trigger_stage]) {
+ /* Match on this trigger stage. */
+ devc->trigger_buffer[devc->trigger_stage] = cur_sample;
+ devc->trigger_stage++;
+
+ if (devc->trigger_stage == NUM_TRIGGER_STAGES ||
+ devc->trigger_mask[devc->trigger_stage] == 0) {
+ /* Match on all trigger stages, we're done. */
+ trigger_offset = i + 1;
+
+ /*
+ * TODO: Send pre-trigger buffer to session bus.
+ * Tell the frontend we hit the trigger here.
+ */
+ packet.type = SR_DF_TRIGGER;
+ packet.payload = NULL;
+ sr_session_send(devc->session_dev_id, &packet);
+
+ /*
+ * Send the samples that triggered it, since we're
+ * skipping past them.
+ */
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+ logic.unitsize = sizeof(*devc->trigger_buffer);
+ logic.length = devc->trigger_stage * logic.unitsize;
+ logic.data = devc->trigger_buffer;
+ sr_session_send(devc->session_dev_id, &packet);
+
+ devc->trigger_stage = TRIGGER_FIRED;
+ break;
+ }
+ } else if (devc->trigger_stage > 0) {
+ /*
+ * We had a match before, but not in the next sample. However, we may
+ * have a match on this stage in the next bit -- trigger on 0001 will
+ * fail on seeing 00001, so we need to go back to stage 0 -- but at
+ * the next sample from the one that matched originally, which the
+ * counter increment at the end of the loop takes care of.
+ */
+ i -= devc->trigger_stage;
+ if (i < -1)
+ i = -1; /* Oops, went back past this buffer. */
+ /* Reset trigger stage. */
+ devc->trigger_stage = 0;
+ }
+ }
+ }
+
+ if (devc->trigger_stage == TRIGGER_FIRED) {
+ /* Send the incoming transfer to the session bus. */
+ const int trigger_offset_bytes = trigger_offset * sample_width;
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+ logic.length = transfer->actual_length - trigger_offset_bytes;
+ logic.unitsize = sample_width;
+ logic.data = cur_buf + trigger_offset_bytes;
+ sr_session_send(devc->session_dev_id, &packet);
+
+ devc->num_samples += cur_sample_count;
+ if (devc->limit_samples &&
+ (unsigned int)devc->num_samples > devc->limit_samples) {
+ abort_acquisition(devc);
+ free_transfer(transfer);
+ return;
+ }
+ } else {
+ /*
+ * TODO: Buffer pre-trigger data in capture
+ * ratio-sized buffer.
+ */
+ }
+
+ resubmit_transfer(transfer);
+}
+
+static unsigned int to_bytes_per_ms(unsigned int samplerate)
+{
+ return samplerate / 1000;
+}
+
+static size_t get_buffer_size(struct dev_context *devc)
+{
+ size_t s;
+
+ /* The buffer should be large enough to hold 10ms of data and a multiple
+ * of 512. */
+ s = 10 * to_bytes_per_ms(devc->cur_samplerate);
+ return (s + 511) & ~511;
}
-static int hw_dev_acquisition_start(int dev_index, gpointer session_data)
+static unsigned int get_number_of_transfers(struct dev_context *devc)
{
- (void)dev_index;
- (void)session_data;
+ unsigned int n;
+
+ /* Total buffer size should be able to hold about 500ms of data */
+ n = 500 * to_bytes_per_ms(devc->cur_samplerate) / get_buffer_size(devc);
+
+ if (n > NUM_SIMUL_TRANSFERS)
+ return NUM_SIMUL_TRANSFERS;
+
+ return n;
+}
+
+static unsigned int get_timeout(struct dev_context *devc)
+{
+ size_t total_size;
+ unsigned int timeout;
+
+ total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
+ timeout = total_size / to_bytes_per_ms(devc->cur_samplerate);
+ return timeout + timeout / 4; /* Leave a headroom of 25% percent */
+}
+
+static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
+ void *cb_data)
+{
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_header header;
+ struct sr_datafeed_meta_logic meta;
+ struct dev_context *devc;
+ struct drv_context *drvc = fdi->priv;
+ struct libusb_transfer *transfer;
+ const struct libusb_pollfd **lupfd;
+ unsigned int i;
+ int ret;
+ unsigned char *buf;
+
+ devc = sdi->priv;
+ if (devc->submitted_transfers != 0)
+ return SR_ERR;
+
+ if (configure_probes(sdi) != SR_OK) {
+ sr_err("fx2lafw: failed to configured probes");
+ return SR_ERR;
+ }
+
+ devc->session_dev_id = cb_data;
+ devc->num_samples = 0;
+ devc->empty_transfer_count = 0;
+
+ const unsigned int timeout = get_timeout(devc);
+ const unsigned int num_transfers = get_number_of_transfers(devc);
+ const size_t size = get_buffer_size(devc);
+
+ devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
+ if (!devc->transfers) {
+ sr_err("fx2lafw: USB transfers malloc failed.");
+ return SR_ERR_MALLOC;
+ }
+
+ devc->num_transfers = num_transfers;
+
+ for (i = 0; i < num_transfers; i++) {
+ if (!(buf = g_try_malloc(size))) {
+ sr_err("fx2lafw: %s: buf malloc failed.", __func__);
+ return SR_ERR_MALLOC;
+ }
+ transfer = libusb_alloc_transfer(0);
+ libusb_fill_bulk_transfer(transfer, devc->usb->devhdl,
+ 2 | LIBUSB_ENDPOINT_IN, buf, size,
+ receive_transfer, devc, timeout);
+ if ((ret = libusb_submit_transfer(transfer)) != 0) {
+ sr_err("fx2lafw: %s: libusb_submit_transfer: %s.",
+ __func__, libusb_error_name(ret));
+ libusb_free_transfer(transfer);
+ g_free(buf);
+ abort_acquisition(devc);
+ return SR_ERR;
+ }
+ devc->transfers[i] = transfer;
+ devc->submitted_transfers++;
+ }
+
+ lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
+ for (i = 0; lupfd[i]; i++)
+ sr_source_add(lupfd[i]->fd, lupfd[i]->events,
+ timeout, receive_data, NULL);
+ free(lupfd); /* NOT g_free()! */
+
+ packet.type = SR_DF_HEADER;
+ packet.payload = &header;
+ header.feed_version = 1;
+ gettimeofday(&header.starttime, NULL);
+ sr_session_send(cb_data, &packet);
+
+ /* Send metadata about the SR_DF_LOGIC packets to come. */
+ packet.type = SR_DF_META_LOGIC;
+ packet.payload = &meta;
+ meta.samplerate = devc->cur_samplerate;
+ meta.num_probes = devc->sample_wide ? 16 : 8;
+ sr_session_send(cb_data, &packet);
+
+ if ((ret = command_start_acquisition (devc->usb->devhdl,
+ devc->cur_samplerate, devc->sample_wide)) != SR_OK) {
+ abort_acquisition(devc);
+ return ret;
+ }
+
return SR_OK;
}
-/* This stops acquisition on ALL devices, ignoring device_index. */
-static int hw_dev_acquisition_stop(int dev_index, gpointer session_data)
+/* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
+static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
- (void)dev_index;
- (void)session_data;
+ (void)cb_data;
+
+ abort_acquisition(sdi->priv);
+
return SR_OK;
}
-SR_PRIV struct sr_dev_plugin fx2lafw_plugin_info = {
+SR_PRIV struct sr_dev_driver fx2lafw_driver_info = {
.name = "fx2lafw",
- .longname = "fx2lafw",
+ .longname = "fx2lafw (generic driver for FX2 based LAs)",
.api_version = 1,
.init = hw_init,
.cleanup = hw_cleanup,
+ .scan = hw_scan,
+ .dev_list = hw_dev_list,
+ .dev_clear = clear_instances,
.dev_open = hw_dev_open,
.dev_close = hw_dev_close,
- .dev_info_get = hw_dev_info_get,
- .dev_status_get = hw_dev_status_get,
- .hwcap_get_all = hw_hwcap_get_all,
+ .info_get = hw_info_get,
.dev_config_set = hw_dev_config_set,
.dev_acquisition_start = hw_dev_acquisition_start,
.dev_acquisition_stop = hw_dev_acquisition_stop,
+ .priv = NULL,
};