+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * 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/>.
- */
-
-#include "protocol.h"
-
-/* Protocol commands */
-#define CMD_GET_FW_VERSION 0xb0
-#define CMD_START 0xb1
-#define CMD_GET_REVID_VERSION 0xb2
-
-#define CMD_START_FLAGS_WIDE_POS 5
-#define CMD_START_FLAGS_CLK_SRC_POS 6
-
-#define CMD_START_FLAGS_SAMPLE_8BIT (0 << CMD_START_FLAGS_WIDE_POS)
-#define CMD_START_FLAGS_SAMPLE_16BIT (1 << CMD_START_FLAGS_WIDE_POS)
-
-#define CMD_START_FLAGS_CLK_30MHZ (0 << CMD_START_FLAGS_CLK_SRC_POS)
-#define CMD_START_FLAGS_CLK_48MHZ (1 << CMD_START_FLAGS_CLK_SRC_POS)
-
-#pragma pack(push, 1)
-
-struct version_info {
- uint8_t major;
- uint8_t minor;
-};
-
-struct cmd_start_acquisition {
- uint8_t flags;
- uint8_t sample_delay_h;
- uint8_t sample_delay_l;
-};
-
-#pragma pack(pop)
-
-static int command_get_fw_version(libusb_device_handle *devhdl,
- struct version_info *vi)
-{
- int ret;
-
- ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR |
- LIBUSB_ENDPOINT_IN, CMD_GET_FW_VERSION, 0x0000, 0x0000,
- (unsigned char *)vi, sizeof(struct version_info), 100);
-
- if (ret < 0) {
- sr_err("Unable to get version info: %s.",
- libusb_error_name(ret));
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-static int command_get_revid_version(struct sr_dev_inst *sdi, uint8_t *revid)
-{
- struct sr_usb_dev_inst *usb = sdi->conn;
- libusb_device_handle *devhdl = usb->devhdl;
- int ret;
-
- ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR |
- LIBUSB_ENDPOINT_IN, CMD_GET_REVID_VERSION, 0x0000, 0x0000,
- revid, 1, 100);
-
- if (ret < 0) {
- sr_err("Unable to get REVID: %s.", libusb_error_name(ret));
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-SR_PRIV int fx2lafw_command_start_acquisition(const struct sr_dev_inst *sdi)
-{
- struct dev_context *devc = sdi->priv;
- struct sr_usb_dev_inst *usb = sdi->conn;
- libusb_device_handle *devhdl = usb->devhdl;
- uint64_t samplerate = devc->cur_samplerate;
- gboolean samplewide = devc->sample_wide;
- struct cmd_start_acquisition cmd = { 0 };
- int delay = 0, ret;
-
- /* Compute the sample rate. */
- if (samplewide && samplerate > MAX_16BIT_SAMPLE_RATE) {
- sr_err("Unable to sample at %" PRIu64 "Hz "
- "when collecting 16-bit samples.", samplerate);
- return SR_ERR;
- }
-
- if ((SR_MHZ(48) % samplerate) == 0) {
- cmd.flags = CMD_START_FLAGS_CLK_48MHZ;
- delay = SR_MHZ(48) / samplerate - 1;
- if (delay > MAX_SAMPLE_DELAY)
- delay = 0;
- }
-
- if (delay == 0 && (SR_MHZ(30) % samplerate) == 0) {
- cmd.flags = CMD_START_FLAGS_CLK_30MHZ;
- delay = SR_MHZ(30) / samplerate - 1;
- }
-
- sr_info("GPIF delay = %d, clocksource = %sMHz.", delay,
- (cmd.flags & CMD_START_FLAGS_CLK_48MHZ) ? "48" : "30");
-
- if (delay <= 0 || delay > MAX_SAMPLE_DELAY) {
- sr_err("Unable to sample at %" PRIu64 "Hz.", samplerate);
- return SR_ERR;
- }
-
- cmd.sample_delay_h = (delay >> 8) & 0xff;
- cmd.sample_delay_l = delay & 0xff;
-
- /* Select the sampling width. */
- cmd.flags |= samplewide ? CMD_START_FLAGS_SAMPLE_16BIT :
- CMD_START_FLAGS_SAMPLE_8BIT;
-
- /* Send the control message. */
- ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR |
- LIBUSB_ENDPOINT_OUT, CMD_START, 0x0000, 0x0000,
- (unsigned char *)&cmd, sizeof(cmd), 100);
- if (ret < 0) {
- sr_err("Unable to send start command: %s.",
- libusb_error_name(ret));
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-/**
- * 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.
- */
-SR_PRIV gboolean fx2lafw_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;
-}
-
-SR_PRIV int fx2lafw_dev_open(struct sr_dev_inst *sdi, struct sr_dev_driver *di)
-{
- libusb_device **devlist;
- struct sr_usb_dev_inst *usb;
- struct libusb_device_descriptor des;
- struct dev_context *devc;
- struct drv_context *drvc;
- struct version_info vi;
- int ret, skip, i, device_count;
- uint8_t revid;
-
- drvc = di->priv;
- devc = sdi->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 != 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]) != 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 = command_get_fw_version(usb->devhdl, &vi);
- if (ret != SR_OK) {
- sr_err("Failed to get firmware version.");
- break;
- }
-
- ret = command_get_revid_version(sdi, &revid);
- if (ret != SR_OK) {
- sr_err("Failed to get 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("Expected firmware version %d.x, "
- "got %d.%d.", FX2LAFW_REQUIRED_VERSION_MAJOR,
- vi.major, vi.minor);
- break;
- }
-
- sdi->status = SR_ST_ACTIVE;
- sr_info("Opened device %d on %d.%d, "
- "interface %d, firmware %d.%d.",
- sdi->index, usb->bus, usb->address,
- USB_INTERFACE, vi.major, vi.minor);
-
- sr_info("Detected REVID=%d, it's a Cypress CY7C68013%s.",
- revid, (revid != 1) ? " (FX2)" : "A (FX2LP)");
-
- break;
- }
- libusb_free_device_list(devlist, 1);
-
- if (sdi->status != SR_ST_ACTIVE)
- return SR_ERR;
-
- return SR_OK;
-}
-
-SR_PRIV struct dev_context *fx2lafw_dev_new(void)
-{
- struct dev_context *devc;
-
- if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
- sr_err("Device context malloc failed.");
- return NULL;
- }
-
- devc->profile = NULL;
- devc->fw_updated = 0;
- devc->cur_samplerate = 0;
- devc->limit_samples = 0;
- devc->sample_wide = FALSE;
- devc->stl = NULL;
-
- return devc;
-}
-
-SR_PRIV void fx2lafw_abort_acquisition(struct dev_context *devc)
-{
- int i;
-
- devc->acq_aborted = TRUE;
-
- for (i = devc->num_transfers - 1; i >= 0; i--) {
- if (devc->transfers[i])
- libusb_cancel_transfer(devc->transfers[i]);
- }
-}
-
-static void finish_acquisition(struct sr_dev_inst *sdi)
-{
- struct sr_datafeed_packet packet;
- struct dev_context *devc;
-
- devc = sdi->priv;
-
- /* Terminate session. */
- packet.type = SR_DF_END;
- sr_session_send(sdi, &packet);
-
- /* Remove fds from polling. */
- usb_source_remove(sdi->session, devc->ctx);
-
- devc->num_transfers = 0;
- g_free(devc->transfers);
-
- if (devc->stl) {
- soft_trigger_logic_free(devc->stl);
- devc->stl = NULL;
- }
-}
-
-static void free_transfer(struct libusb_transfer *transfer)
-{
- struct sr_dev_inst *sdi;
- struct dev_context *devc;
- unsigned int i;
-
- sdi = transfer->user_data;
- devc = sdi->priv;
-
- 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(sdi);
-}
-
-static void resubmit_transfer(struct libusb_transfer *transfer)
-{
- int ret;
-
- if ((ret = libusb_submit_transfer(transfer)) == LIBUSB_SUCCESS)
- return;
-
- sr_err("%s: %s", __func__, libusb_error_name(ret));
- free_transfer(transfer);
-
-}
-
-SR_PRIV void fx2lafw_receive_transfer(struct libusb_transfer *transfer)
-{
- struct sr_dev_inst *sdi;
- struct dev_context *devc;
- gboolean packet_has_error = FALSE;
- struct sr_datafeed_packet packet;
- struct sr_datafeed_logic logic;
- unsigned int num_samples;
- int trigger_offset, cur_sample_count, unitsize;
-
- sdi = transfer->user_data;
- devc = sdi->priv;
-
- /*
- * If acquisition has already ended, just free any queued up
- * transfer that come in.
- */
- if (devc->acq_aborted) {
- free_transfer(transfer);
- return;
- }
-
- sr_info("receive_transfer(): status %d received %d bytes.",
- transfer->status, transfer->actual_length);
-
- /* Save incoming transfer before reusing the transfer struct. */
- unitsize = devc->sample_wide ? 2 : 1;
- cur_sample_count = transfer->actual_length / unitsize;
-
- switch (transfer->status) {
- case LIBUSB_TRANSFER_NO_DEVICE:
- fx2lafw_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.
- */
- fx2lafw_abort_acquisition(devc);
- free_transfer(transfer);
- } else {
- resubmit_transfer(transfer);
- }
- return;
- } else {
- devc->empty_transfer_count = 0;
- }
-
- if (devc->trigger_fired) {
- if (devc->sent_samples < devc->limit_samples) {
- /* Send the incoming transfer to the session bus. */
- packet.type = SR_DF_LOGIC;
- packet.payload = &logic;
- if (devc->sent_samples + cur_sample_count > devc->limit_samples)
- num_samples = devc->limit_samples - devc->sent_samples;
- else
- num_samples = cur_sample_count;
- logic.length = num_samples * unitsize;
- logic.unitsize = unitsize;
- logic.data = transfer->buffer;
- sr_session_send(devc->cb_data, &packet);
- devc->sent_samples += num_samples;
- }
- } else {
- trigger_offset = soft_trigger_logic_check(devc->stl,
- transfer->buffer, transfer->actual_length);
- if (trigger_offset > -1) {
- packet.type = SR_DF_LOGIC;
- packet.payload = &logic;
- num_samples = cur_sample_count - trigger_offset;
- if (devc->limit_samples &&
- num_samples > devc->limit_samples - devc->sent_samples)
- num_samples = devc->limit_samples - devc->sent_samples;
- logic.length = num_samples * unitsize;
- logic.unitsize = unitsize;
- logic.data = transfer->buffer + trigger_offset * unitsize;
- sr_session_send(devc->cb_data, &packet);
- devc->sent_samples += num_samples;
-
- devc->trigger_fired = TRUE;
- }
- }
-
- if (devc->limit_samples && devc->sent_samples >= devc->limit_samples) {
- fx2lafw_abort_acquisition(devc);
- free_transfer(transfer);
- } else
- resubmit_transfer(transfer);
-}
-
-static unsigned int to_bytes_per_ms(unsigned int samplerate)
-{
- return samplerate / 1000;
-}
-
-SR_PRIV size_t fx2lafw_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;
-}
-
-SR_PRIV unsigned int fx2lafw_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 * to_bytes_per_ms(devc->cur_samplerate) /
- fx2lafw_get_buffer_size(devc));
-
- if (n > NUM_SIMUL_TRANSFERS)
- return NUM_SIMUL_TRANSFERS;
-
- return n;
-}
-
-SR_PRIV unsigned int fx2lafw_get_timeout(struct dev_context *devc)
-{
- size_t total_size;
- unsigned int timeout;
-
- total_size = fx2lafw_get_buffer_size(devc) *
- fx2lafw_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. */
-}
projects / libsigrok.git / blobdiff