libsigrok/hardware/saleae-logic16/api.c

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/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
* Copyright (C) 2013 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
* 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/>.
*/
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#include <glib.h>
#include <libusb.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
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#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "protocol.h"
#define LOGIC16_VID 0x21a9
#define LOGIC16_PID 0x1001
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#define USB_INTERFACE 0
#define USB_CONFIGURATION 1
#define FX2_FIRMWARE FIRMWARE_DIR "/saleae-logic16-fx2.fw"
#define MAX_RENUM_DELAY_MS 3000
#define NUM_SIMUL_TRANSFERS 32
SR_PRIV struct sr_dev_driver saleae_logic16_driver_info;
static struct sr_dev_driver *di = &saleae_logic16_driver_info;
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static const int32_t hwopts[] = {
SR_CONF_CONN,
};
static const int32_t hwcaps[] = {
SR_CONF_LOGIC_ANALYZER,
SR_CONF_SAMPLERATE,
SR_CONF_VOLTAGE_THRESHOLD,
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/* These are really implemented in the driver, not the hardware. */
SR_CONF_LIMIT_SAMPLES,
SR_CONF_CONTINUOUS,
};
static const char *probe_names[] = {
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"0", "1", "2", "3", "4", "5", "6", "7", "8",
"9", "10", "11", "12", "13", "14", "15",
NULL,
};
static const struct {
enum voltage_range range;
gdouble low;
gdouble high;
} volt_thresholds[] = {
{ VOLTAGE_RANGE_18_33_V, 0.7, 1.4 },
{ VOLTAGE_RANGE_5_V, 1.4, 3.6 },
};
static const uint64_t samplerates[] = {
SR_KHZ(500),
SR_MHZ(1),
SR_MHZ(2),
SR_MHZ(4),
SR_MHZ(5),
SR_MHZ(8),
SR_MHZ(10),
SR_KHZ(12500),
SR_MHZ(16),
SR_MHZ(25),
SR_MHZ(32),
SR_MHZ(40),
SR_MHZ(80),
SR_MHZ(100),
};
static int init(struct sr_context *sr_ctx)
{
return std_init(sr_ctx, di, LOG_PREFIX);
}
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 (strcmp((const char *)strdesc, "Saleae LLC"))
break;
if (libusb_get_string_descriptor_ascii(hdl,
des.iProduct, strdesc, sizeof(strdesc)) < 0)
break;
if (strcmp((const char *)strdesc, "Logic S/16"))
break;
/* If we made it here, it must be a configured Logic16. */
ret = TRUE;
}
if (hdl)
libusb_close(hdl);
return ret;
}
static GSList *scan(GSList *options)
{
struct drv_context *drvc;
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struct dev_context *devc;
struct sr_dev_inst *sdi;
struct sr_usb_dev_inst *usb;
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struct sr_probe *probe;
struct sr_config *src;
GSList *l, *devices, *conn_devices;
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struct libusb_device_descriptor des;
libusb_device **devlist;
int devcnt, ret, i, j;
const char *conn;
drvc = di->priv;
conn = NULL;
for (l = options; l; l = l->next) {
src = l->data;
switch (src->key) {
case SR_CONF_CONN:
conn = g_variant_get_string(src->data, NULL);
break;
}
}
if (conn)
conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
else
conn_devices = NULL;
/* Find all Logic16 devices and upload firmware to them. */
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devices = NULL;
libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
for (i = 0; devlist[i]; i++) {
if (conn) {
usb = NULL;
for (l = conn_devices; l; l = l->next) {
usb = l->data;
if (usb->bus == libusb_get_bus_number(devlist[i])
&& usb->address == libusb_get_device_address(devlist[i]))
break;
}
if (!l)
/* This device matched none of the ones that
* matched the conn specification. */
continue;
}
if ((ret = libusb_get_device_descriptor(devlist[i], &des)) != 0) {
sr_warn("Failed to get device descriptor: %s.",
libusb_error_name(ret));
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continue;
}
if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
continue;
devcnt = g_slist_length(drvc->instances);
sdi = sr_dev_inst_new(devcnt, SR_ST_INITIALIZING,
"Saleae", "Logic16", NULL);
if (!sdi)
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return NULL;
sdi->driver = di;
for (j = 0; probe_names[j]; j++) {
if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE,
probe_names[j])))
return NULL;
sdi->probes = g_slist_append(sdi->probes, probe);
}
if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
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return NULL;
devc->selected_voltage_range = VOLTAGE_RANGE_18_33_V;
sdi->priv = devc;
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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("Found a Logic16 device.");
sdi->status = SR_ST_INACTIVE;
sdi->inst_type = SR_INST_USB;
sdi->conn = 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,
FX2_FIRMWARE) == SR_OK)
/* Store when this device's FW was updated. */
devc->fw_updated = g_get_monotonic_time();
else
sr_err("Firmware upload failed for "
"device %d.", devcnt);
sdi->inst_type = SR_INST_USB;
sdi->conn = sr_usb_dev_inst_new(
libusb_get_bus_number(devlist[i]), 0xff, NULL);
}
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}
libusb_free_device_list(devlist, 1);
g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
return devices;
}
static GSList *dev_list(void)
{
return ((struct drv_context *)(di->priv))->instances;
}
static int logic16_dev_open(struct sr_dev_inst *sdi)
{
libusb_device **devlist;
struct sr_usb_dev_inst *usb;
struct libusb_device_descriptor des;
struct drv_context *drvc;
int ret, skip, i, device_count;
drvc = di->priv;
usb = sdi->conn;
if (sdi->status == SR_ST_ACTIVE)
/* Device is already in use. */
return SR_ERR;
skip = 0;
device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
if (device_count < 0) {
sr_err("Failed to get device list: %s.",
libusb_error_name(device_count));
return SR_ERR;
}
for (i = 0; i < device_count; i++) {
if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
sr_err("Failed to get device descriptor: %s.",
libusb_error_name(ret));
continue;
}
if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_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]) != usb->bus
|| libusb_get_device_address(devlist[i]) != usb->address)
/* This is not the one. */
continue;
}
if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
if (usb->address == 0xff)
/*
* First time we touch this device after FW
* upload, so we don't know the address yet.
*/
usb->address = libusb_get_device_address(devlist[i]);
} else {
sr_err("Failed to open device: %s.",
libusb_error_name(ret));
break;
}
ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
if (ret == LIBUSB_ERROR_BUSY) {
sr_err("Unable to claim USB interface. Another "
"program or driver has already claimed it.");
break;
} else if (ret == LIBUSB_ERROR_NO_DEVICE) {
sr_err("Device has been disconnected.");
break;
} else if (ret != 0) {
sr_err("Unable to claim interface: %s.",
libusb_error_name(ret));
break;
}
if ((ret = logic16_init_device(sdi)) != SR_OK) {
sr_err("Failed to init device.");
break;
}
sdi->status = SR_ST_ACTIVE;
sr_info("Opened device %d on %d.%d, interface %d.",
sdi->index, usb->bus, usb->address, USB_INTERFACE);
break;
}
libusb_free_device_list(devlist, 1);
if (sdi->status != SR_ST_ACTIVE) {
if (usb->devhdl) {
libusb_release_interface(usb->devhdl, USB_INTERFACE);
libusb_close(usb->devhdl);
usb->devhdl = NULL;
}
return SR_ERR;
}
return SR_OK;
}
static int dev_open(struct sr_dev_inst *sdi)
{
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("Waiting for device to reset.");
/* Takes >= 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 = logic16_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("Waited %" PRIi64 "ms.", timediff_ms);
}
if (ret != SR_OK) {
sr_err("Device failed to renumerate.");
return SR_ERR;
}
sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
} else {
sr_info("Firmware upload was not needed.");
ret = logic16_dev_open(sdi);
}
if (ret != SR_OK) {
sr_err("Unable to open device.");
return SR_ERR;
}
if (devc->cur_samplerate == 0) {
/* Samplerate hasn't been set; default to the slowest one. */
devc->cur_samplerate = samplerates[0];
}
return SR_OK;
}
static int dev_close(struct sr_dev_inst *sdi)
{
struct sr_usb_dev_inst *usb;
usb = sdi->conn;
if (usb->devhdl == NULL)
return SR_ERR;
sr_info("Closing device %d on %d.%d interface %d.",
sdi->index, usb->bus, usb->address, USB_INTERFACE);
libusb_release_interface(usb->devhdl, USB_INTERFACE);
libusb_close(usb->devhdl);
usb->devhdl = NULL;
sdi->status = SR_ST_INACTIVE;
return SR_OK;
}
static int cleanup(void)
{
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int ret;
struct drv_context *drvc;
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if (!(drvc = di->priv))
/* Can get called on an unused driver, doesn't matter. */
return SR_OK;
ret = std_dev_clear(di, NULL);
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g_free(drvc);
di->priv = NULL;
return ret;
}
static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
const struct sr_probe_group *probe_group)
{
struct dev_context *devc;
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struct sr_usb_dev_inst *usb;
GVariant *range[2];
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char str[128];
int ret;
unsigned int i;
(void)probe_group;
ret = SR_OK;
switch (key) {
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case SR_CONF_CONN:
if (!sdi || !sdi->conn)
return SR_ERR_ARG;
usb = sdi->conn;
if (usb->address == 255)
/* Device still needs to re-enumerate after firmware
* upload, so we don't know its (future) address. */
return SR_ERR;
snprintf(str, 128, "%d.%d", usb->bus, usb->address);
*data = g_variant_new_string(str);
break;
case SR_CONF_SAMPLERATE:
if (!sdi)
return SR_ERR;
devc = sdi->priv;
*data = g_variant_new_uint64(devc->cur_samplerate);
break;
case SR_CONF_VOLTAGE_THRESHOLD:
if (!sdi)
return SR_ERR;
devc = sdi->priv;
ret = SR_ERR;
for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
if (devc->selected_voltage_range !=
volt_thresholds[i].range)
continue;
range[0] = g_variant_new_double(volt_thresholds[i].low);
range[1] = g_variant_new_double(volt_thresholds[i].high);
*data = g_variant_new_tuple(range, 2);
ret = SR_OK;
break;
}
break;
default:
return SR_ERR_NA;
}
return ret;
}
static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
const struct sr_probe_group *probe_group)
{
struct dev_context *devc;
gdouble low, high;
int ret;
unsigned int i;
(void)probe_group;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
devc = sdi->priv;
ret = SR_OK;
switch (key) {
case SR_CONF_SAMPLERATE:
devc->cur_samplerate = g_variant_get_uint64(data);
break;
case SR_CONF_LIMIT_SAMPLES:
devc->limit_samples = g_variant_get_uint64(data);
break;
case SR_CONF_VOLTAGE_THRESHOLD:
g_variant_get(data, "(dd)", &low, &high);
ret = SR_ERR_ARG;
for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
if (fabs(volt_thresholds[i].low - low) < 0.1 &&
fabs(volt_thresholds[i].high - high) < 0.1) {
devc->selected_voltage_range =
volt_thresholds[i].range;
ret = SR_OK;
break;
}
}
break;
default:
ret = SR_ERR_NA;
}
return ret;
}
static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
const struct sr_probe_group *probe_group)
{
GVariant *gvar, *range[2];
GVariantBuilder gvb;
int ret;
unsigned int i;
(void)sdi;
(void)probe_group;
ret = SR_OK;
switch (key) {
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case SR_CONF_SCAN_OPTIONS:
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
break;
case SR_CONF_DEVICE_OPTIONS:
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
break;
case SR_CONF_SAMPLERATE:
g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
*data = g_variant_builder_end(&gvb);
break;
case SR_CONF_VOLTAGE_THRESHOLD:
g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
range[0] = g_variant_new_double(volt_thresholds[i].low);
range[1] = g_variant_new_double(volt_thresholds[i].high);
gvar = g_variant_new_tuple(range, 2);
g_variant_builder_add_value(&gvb, gvar);
}
*data = g_variant_builder_end(&gvb);
break;
default:
return SR_ERR_NA;
}
return ret;
}
static void abort_acquisition(struct dev_context *devc)
{
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 unsigned int bytes_per_ms(struct dev_context *devc)
{
return devc->cur_samplerate * devc->num_channels / 8000;
}
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 * bytes_per_ms(devc);
return (s + 511) & ~511;
}
static unsigned int get_number_of_transfers(struct dev_context *devc)
{
unsigned int n;
/* Total buffer size should be able to hold about 500ms of data. */
n = 500 * bytes_per_ms(devc) / 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 / bytes_per_ms(devc);
return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
}
static int configure_probes(const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
struct sr_probe *probe;
GSList *l;
uint16_t probe_bit;
devc = sdi->priv;
devc->cur_channels = 0;
devc->num_channels = 0;
for (l = sdi->probes; l; l = l->next) {
probe = (struct sr_probe *)l->data;
if (probe->enabled == FALSE)
continue;
probe_bit = 1 << (probe->index);
devc->cur_channels |= probe_bit;
#ifdef WORDS_BIGENDIAN
/*
* Output logic data should be stored in little endian format.
* To speed things up during conversion, do the switcharoo
* here instead.
*/
probe_bit = 1 << (probe->index ^ 8);
#endif
devc->channel_masks[devc->num_channels++] = probe_bit;
}
return SR_OK;
}
static int receive_data(int fd, int revents, void *cb_data)
{
struct timeval tv;
struct dev_context *devc;
struct drv_context *drvc;
const struct sr_dev_inst *sdi;
(void)fd;
(void)revents;
sdi = cb_data;
drvc = di->priv;
devc = sdi->priv;
tv.tv_sec = tv.tv_usec = 0;
libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
if (devc->num_samples == -2) {
logic16_abort_acquisition(sdi);
abort_acquisition(devc);
}
return TRUE;
}
static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
struct dev_context *devc;
struct drv_context *drvc;
struct sr_usb_dev_inst *usb;
struct libusb_transfer *transfer;
unsigned int i, timeout, num_transfers;
int ret;
unsigned char *buf;
size_t size, convsize;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
drvc = di->priv;
devc = sdi->priv;
usb = sdi->conn;
/* Configures devc->cur_channels. */
if (configure_probes(sdi) != SR_OK) {
sr_err("Failed to configure probes.");
return SR_ERR;
}
devc->cb_data = cb_data;
devc->num_samples = 0;
devc->empty_transfer_count = 0;
devc->cur_channel = 0;
memset(devc->channel_data, 0, sizeof(devc->channel_data));
timeout = get_timeout(devc);
num_transfers = get_number_of_transfers(devc);
size = get_buffer_size(devc);
convsize = (size / devc->num_channels + 2) * 16;
devc->submitted_transfers = 0;
devc->convbuffer_size = convsize;
if (!(devc->convbuffer = g_try_malloc(convsize))) {
sr_err("Conversion buffer malloc failed.");
return SR_ERR_MALLOC;
}
devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
if (!devc->transfers) {
sr_err("USB transfers malloc failed.");
g_free(devc->convbuffer);
return SR_ERR_MALLOC;
}
if ((ret = logic16_setup_acquisition(sdi, devc->cur_samplerate,
devc->cur_channels)) != SR_OK) {
g_free(devc->transfers);
g_free(devc->convbuffer);
return ret;
}
devc->num_transfers = num_transfers;
for (i = 0; i < num_transfers; i++) {
if (!(buf = g_try_malloc(size))) {
sr_err("USB transfer buffer malloc failed.");
if (devc->submitted_transfers)
abort_acquisition(devc);
else {
g_free(devc->transfers);
g_free(devc->convbuffer);
}
return SR_ERR_MALLOC;
}
transfer = libusb_alloc_transfer(0);
libusb_fill_bulk_transfer(transfer, usb->devhdl,
2 | LIBUSB_ENDPOINT_IN, buf, size,
logic16_receive_transfer, devc, timeout);
if ((ret = libusb_submit_transfer(transfer)) != 0) {
sr_err("Failed to submit transfer: %s.",
libusb_error_name(ret));
libusb_free_transfer(transfer);
g_free(buf);
abort_acquisition(devc);
return SR_ERR;
}
devc->transfers[i] = transfer;
devc->submitted_transfers++;
}
devc->ctx = drvc->sr_ctx;
usb_source_add(devc->ctx, timeout, receive_data, (void *)sdi);
/* Send header packet to the session bus. */
std_session_send_df_header(cb_data, LOG_PREFIX);
if ((ret = logic16_start_acquisition(sdi)) != SR_OK) {
abort_acquisition(devc);
return ret;
}
return SR_OK;
}
static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
int ret;
(void)cb_data;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
ret = logic16_abort_acquisition(sdi);
abort_acquisition(sdi->priv);
return ret;
}
SR_PRIV struct sr_dev_driver saleae_logic16_driver_info = {
.name = "saleae-logic16",
.longname = "Saleae Logic16",
.api_version = 1,
.init = init,
.cleanup = cleanup,
.scan = scan,
.dev_list = dev_list,
.dev_clear = NULL,
.config_get = config_get,
.config_set = config_set,
.config_list = config_list,
.dev_open = dev_open,
.dev_close = dev_close,
.dev_acquisition_start = dev_acquisition_start,
.dev_acquisition_stop = dev_acquisition_stop,
.priv = NULL,
};