/* * This file is part of the libsigrok project. * * Copyright (C) 2013 Bert Vermeulen * Copyright (C) 2012 Joel Holdsworth * * 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 . */ #include #include #include #include #include "protocol.h" #define DS_CMD_GET_FW_VERSION 0xb0 #define DS_CMD_GET_REVID_VERSION 0xb1 #define DS_CMD_START 0xb2 #define DS_CMD_CONFIG 0xb3 #define DS_CMD_SETTING 0xb4 #define DS_CMD_CONTROL 0xb5 #define DS_CMD_STATUS 0xb6 #define DS_CMD_STATUS_INFO 0xb7 #define DS_CMD_WR_REG 0xb8 #define DS_CMD_WR_NVM 0xb9 #define DS_CMD_RD_NVM 0xba #define DS_CMD_RD_NVM_PRE 0xbb #define DS_CMD_GET_HW_INFO 0xbc #define DS_START_FLAGS_STOP (1 << 7) #define DS_START_FLAGS_CLK_48MHZ (1 << 6) #define DS_START_FLAGS_SAMPLE_WIDE (1 << 5) #define DS_START_FLAGS_MODE_LA (1 << 4) #define DS_ADDR_COMB 0x68 #define DS_ADDR_EEWP 0x70 #define DS_ADDR_VTH 0x78 #define DS_MAX_LOGIC_DEPTH SR_MHZ(16) #define DS_MAX_LOGIC_SAMPLERATE SR_MHZ(100) #define DS_MAX_TRIG_PERCENT 90 #define DS_MODE_TRIG_EN (1 << 0) #define DS_MODE_CLK_TYPE (1 << 1) #define DS_MODE_CLK_EDGE (1 << 2) #define DS_MODE_RLE_MODE (1 << 3) #define DS_MODE_DSO_MODE (1 << 4) #define DS_MODE_HALF_MODE (1 << 5) #define DS_MODE_QUAR_MODE (1 << 6) #define DS_MODE_ANALOG_MODE (1 << 7) #define DS_MODE_FILTER (1 << 8) #define DS_MODE_INSTANT (1 << 9) #define DS_MODE_STRIG_MODE (1 << 11) #define DS_MODE_STREAM_MODE (1 << 12) #define DS_MODE_LPB_TEST (1 << 13) #define DS_MODE_EXT_TEST (1 << 14) #define DS_MODE_INT_TEST (1 << 15) #define DSLOGIC_ATOMIC_SAMPLES (sizeof(uint64_t) * 8) #define DSLOGIC_ATOMIC_BYTES sizeof(uint64_t) /* * The FPGA is configured with TLV tuples. Length is specified as the * number of 16-bit words. */ #define _DS_CFG(variable, wordcnt) ((variable << 8) | wordcnt) #define DS_CFG_START 0xf5a5f5a5 #define DS_CFG_MODE _DS_CFG(0, 1) #define DS_CFG_DIVIDER _DS_CFG(1, 2) #define DS_CFG_COUNT _DS_CFG(3, 2) #define DS_CFG_TRIG_POS _DS_CFG(5, 2) #define DS_CFG_TRIG_GLB _DS_CFG(7, 1) #define DS_CFG_CH_EN _DS_CFG(8, 1) #define DS_CFG_TRIG _DS_CFG(64, 160) #define DS_CFG_END 0xfa5afa5a #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; }; struct dslogic_fpga_config { uint32_t sync; uint16_t mode_header; uint16_t mode; uint16_t divider_header; uint32_t divider; uint16_t count_header; uint32_t count; uint16_t trig_pos_header; uint32_t trig_pos; uint16_t trig_glb_header; uint16_t trig_glb; uint16_t ch_en_header; uint16_t ch_en; uint16_t trig_header; uint16_t trig_mask0[NUM_TRIGGER_STAGES]; uint16_t trig_mask1[NUM_TRIGGER_STAGES]; uint16_t trig_value0[NUM_TRIGGER_STAGES]; uint16_t trig_value1[NUM_TRIGGER_STAGES]; uint16_t trig_edge0[NUM_TRIGGER_STAGES]; uint16_t trig_edge1[NUM_TRIGGER_STAGES]; uint16_t trig_logic0[NUM_TRIGGER_STAGES]; uint16_t trig_logic1[NUM_TRIGGER_STAGES]; uint32_t trig_count[NUM_TRIGGER_STAGES]; uint32_t end_sync; }; #pragma pack(pop) /* * This should be larger than the FPGA bitstream image so that it'll get * uploaded in one big operation. There seem to be issues when uploading * it in chunks. */ #define FW_BUFSIZE (1024 * 1024) #define FPGA_UPLOAD_DELAY (10 * 1000) #define USB_TIMEOUT (3 * 1000) 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, DS_CMD_GET_FW_VERSION, 0x0000, 0x0000, (unsigned char *)vi, sizeof(struct version_info), USB_TIMEOUT); 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, DS_CMD_GET_REVID_VERSION, 0x0000, 0x0000, revid, 1, USB_TIMEOUT); if (ret < 0) { sr_err("Unable to get REVID: %s.", libusb_error_name(ret)); return SR_ERR; } return SR_OK; } static int command_start_acquisition(const struct sr_dev_inst *sdi) { struct sr_usb_dev_inst *usb; struct dslogic_mode mode; int ret; mode.flags = DS_START_FLAGS_MODE_LA | DS_START_FLAGS_SAMPLE_WIDE; mode.sample_delay_h = mode.sample_delay_l = 0; usb = sdi->conn; ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT, DS_CMD_START, 0x0000, 0x0000, (unsigned char *)&mode, sizeof(mode), USB_TIMEOUT); if (ret < 0) { sr_err("Failed to send start command: %s.", libusb_error_name(ret)); return SR_ERR; } return SR_OK; } static int command_stop_acquisition(const struct sr_dev_inst *sdi) { struct sr_usb_dev_inst *usb; struct dslogic_mode mode; int ret; mode.flags = DS_START_FLAGS_STOP; mode.sample_delay_h = mode.sample_delay_l = 0; usb = sdi->conn; ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT, DS_CMD_START, 0x0000, 0x0000, (unsigned char *)&mode, sizeof(struct dslogic_mode), USB_TIMEOUT); if (ret < 0) { sr_err("Failed to send stop command: %s.", libusb_error_name(ret)); return SR_ERR; } return SR_OK; } SR_PRIV int dslogic_fpga_firmware_upload(const struct sr_dev_inst *sdi) { const char *name = NULL; uint64_t sum; struct sr_resource bitstream; struct drv_context *drvc; struct dev_context *devc; struct sr_usb_dev_inst *usb; unsigned char *buf; ssize_t chunksize; int transferred; int result, ret; const uint8_t cmd[3] = {0, 0, 0}; drvc = sdi->driver->context; devc = sdi->priv; usb = sdi->conn; if (!strcmp(devc->profile->model, "DSLogic")) { if (devc->cur_threshold < 1.40) name = DSLOGIC_FPGA_FIRMWARE_3V3; else name = DSLOGIC_FPGA_FIRMWARE_5V; } else if (!strcmp(devc->profile->model, "DSLogic Pro")){ name = DSLOGIC_PRO_FPGA_FIRMWARE; } else if (!strcmp(devc->profile->model, "DSLogic Plus")){ name = DSLOGIC_PLUS_FPGA_FIRMWARE; } else if (!strcmp(devc->profile->model, "DSLogic Basic")){ name = DSLOGIC_BASIC_FPGA_FIRMWARE; } else if (!strcmp(devc->profile->model, "DSCope")) { name = DSCOPE_FPGA_FIRMWARE; } else { sr_err("Failed to select FPGA firmware."); return SR_ERR; } sr_dbg("Uploading FPGA firmware '%s'.", name); result = sr_resource_open(drvc->sr_ctx, &bitstream, SR_RESOURCE_FIRMWARE, name); if (result != SR_OK) return result; /* Tell the device firmware is coming. */ if ((ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT, DS_CMD_CONFIG, 0x0000, 0x0000, (unsigned char *)&cmd, sizeof(cmd), USB_TIMEOUT)) < 0) { sr_err("Failed to upload FPGA firmware: %s.", libusb_error_name(ret)); sr_resource_close(drvc->sr_ctx, &bitstream); return SR_ERR; } /* Give the FX2 time to get ready for FPGA firmware upload. */ g_usleep(FPGA_UPLOAD_DELAY); buf = g_malloc(FW_BUFSIZE); sum = 0; result = SR_OK; while (1) { chunksize = sr_resource_read(drvc->sr_ctx, &bitstream, buf, FW_BUFSIZE); if (chunksize < 0) result = SR_ERR; if (chunksize <= 0) break; if ((ret = libusb_bulk_transfer(usb->devhdl, 2 | LIBUSB_ENDPOINT_OUT, buf, chunksize, &transferred, USB_TIMEOUT)) < 0) { sr_err("Unable to configure FPGA firmware: %s.", libusb_error_name(ret)); result = SR_ERR; break; } sum += transferred; sr_spew("Uploaded %" PRIu64 "/%" PRIu64 " bytes.", sum, bitstream.size); if (transferred != chunksize) { sr_err("Short transfer while uploading FPGA firmware."); result = SR_ERR; break; } } g_free(buf); sr_resource_close(drvc->sr_ctx, &bitstream); if (result == SR_OK) sr_dbg("FPGA firmware upload done."); return result; } static unsigned int enabled_channel_count(const struct sr_dev_inst *sdi) { unsigned int count = 0; for (const GSList *l = sdi->channels; l; l = l->next) { const struct sr_channel *const probe = (struct sr_channel *)l->data; if (probe->enabled) count++; } return count; } static uint16_t enabled_channel_mask(const struct sr_dev_inst *sdi) { unsigned int mask = 0; for (const GSList *l = sdi->channels; l; l = l->next) { const struct sr_channel *const probe = (struct sr_channel *)l->data; if (probe->enabled) mask |= 1 << probe->index; } return mask; } /* * Get the session trigger and configure the FPGA structure * accordingly. */ static void set_trigger(const struct sr_dev_inst *sdi, struct dslogic_fpga_config *cfg) { struct sr_trigger *trigger; struct sr_trigger_stage *stage; struct sr_trigger_match *match; struct dev_context *devc; const GSList *l, *m; const unsigned int num_enabled_channels = enabled_channel_count(sdi); int num_trigger_stages = 0; int channelbit, i = 0; uint32_t trigger_point; devc = sdi->priv; cfg->ch_en = enabled_channel_mask(sdi); cfg->trig_mask0[0] = 0xffff; cfg->trig_mask1[0] = 0xffff; cfg->trig_value0[0] = 0; cfg->trig_value1[0] = 0; cfg->trig_edge0[0] = 0; cfg->trig_edge1[0] = 0; cfg->trig_logic0[0] = 2; cfg->trig_logic1[0] = 2; cfg->trig_count[0] = 0; cfg->trig_glb = num_enabled_channels << 4; for (i = 1; i < NUM_TRIGGER_STAGES; i++) { cfg->trig_mask0[i] = 0xffff; cfg->trig_mask1[i] = 0xffff; cfg->trig_value0[i] = 0; cfg->trig_value1[i] = 0; cfg->trig_edge0[i] = 0; cfg->trig_edge1[i] = 0; cfg->trig_logic0[i] = 2; cfg->trig_logic1[i] = 2; cfg->trig_count[i] = 0; } trigger_point = (devc->capture_ratio * devc->limit_samples) / 100; if (trigger_point < DSLOGIC_ATOMIC_SAMPLES) trigger_point = DSLOGIC_ATOMIC_SAMPLES; const uint32_t mem_depth = devc->profile->mem_depth; const uint32_t max_trigger_point = devc->continuous_mode ? ((mem_depth * 10) / 100) : ((mem_depth * DS_MAX_TRIG_PERCENT) / 100); if (trigger_point > max_trigger_point) trigger_point = max_trigger_point; cfg->trig_pos = trigger_point & ~(DSLOGIC_ATOMIC_SAMPLES - 1); if (!(trigger = sr_session_trigger_get(sdi->session))) { sr_dbg("No session trigger found"); return; } for (l = trigger->stages; l; l = l->next) { stage = l->data; num_trigger_stages++; for (m = stage->matches; m; m = m->next) { match = m->data; if (!match->channel->enabled) /* Ignore disabled channels with a trigger. */ continue; channelbit = 1 << (match->channel->index); /* Simple trigger support (event). */ if (match->match == SR_TRIGGER_ONE) { cfg->trig_mask0[0] &= ~channelbit; cfg->trig_mask1[0] &= ~channelbit; cfg->trig_value0[0] |= channelbit; cfg->trig_value1[0] |= channelbit; } else if (match->match == SR_TRIGGER_ZERO) { cfg->trig_mask0[0] &= ~channelbit; cfg->trig_mask1[0] &= ~channelbit; } else if (match->match == SR_TRIGGER_FALLING) { cfg->trig_mask0[0] &= ~channelbit; cfg->trig_mask1[0] &= ~channelbit; cfg->trig_edge0[0] |= channelbit; cfg->trig_edge1[0] |= channelbit; } else if (match->match == SR_TRIGGER_RISING) { cfg->trig_mask0[0] &= ~channelbit; cfg->trig_mask1[0] &= ~channelbit; cfg->trig_value0[0] |= channelbit; cfg->trig_value1[0] |= channelbit; cfg->trig_edge0[0] |= channelbit; cfg->trig_edge1[0] |= channelbit; } else if (match->match == SR_TRIGGER_EDGE) { cfg->trig_edge0[0] |= channelbit; cfg->trig_edge1[0] |= channelbit; } } } cfg->trig_glb |= num_trigger_stages; return; } static int fpga_configure(const struct sr_dev_inst *sdi) { struct dev_context *devc; struct sr_usb_dev_inst *usb; uint8_t c[3]; struct dslogic_fpga_config cfg; uint16_t v16; uint32_t v32; int transferred, len, ret; sr_dbg("Configuring FPGA."); usb = sdi->conn; devc = sdi->priv; WL32(&cfg.sync, DS_CFG_START); WL16(&cfg.mode_header, DS_CFG_MODE); WL16(&cfg.divider_header, DS_CFG_DIVIDER); WL16(&cfg.count_header, DS_CFG_COUNT); WL16(&cfg.trig_pos_header, DS_CFG_TRIG_POS); WL16(&cfg.trig_glb_header, DS_CFG_TRIG_GLB); WL16(&cfg.ch_en_header, DS_CFG_CH_EN); WL16(&cfg.trig_header, DS_CFG_TRIG); WL32(&cfg.end_sync, DS_CFG_END); /* Pass in the length of a fixed-size struct. Really. */ len = sizeof(struct dslogic_fpga_config) / 2; c[0] = len & 0xff; c[1] = (len >> 8) & 0xff; c[2] = (len >> 16) & 0xff; ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT, DS_CMD_SETTING, 0x0000, 0x0000, c, sizeof(c), USB_TIMEOUT); if (ret < 0) { sr_err("Failed to send FPGA configure command: %s.", libusb_error_name(ret)); return SR_ERR; } v16 = 0x0000; if (devc->mode == DS_OP_INTERNAL_TEST) v16 = DS_MODE_INT_TEST; else if (devc->mode == DS_OP_EXTERNAL_TEST) v16 = DS_MODE_EXT_TEST; else if (devc->mode == DS_OP_LOOPBACK_TEST) v16 = DS_MODE_LPB_TEST; if (devc->cur_samplerate == DS_MAX_LOGIC_SAMPLERATE * 2) v16 |= DS_MODE_HALF_MODE; else if (devc->cur_samplerate == DS_MAX_LOGIC_SAMPLERATE * 4) v16 |= DS_MODE_QUAR_MODE; if (devc->continuous_mode) v16 |= DS_MODE_STREAM_MODE; if (devc->external_clock) { v16 |= DS_MODE_CLK_TYPE; if (devc->clock_edge == DS_EDGE_FALLING) v16 |= DS_MODE_CLK_EDGE; } if (devc->limit_samples > DS_MAX_LOGIC_DEPTH * ceil(devc->cur_samplerate * 1.0 / DS_MAX_LOGIC_SAMPLERATE) && !devc->continuous_mode) { /* Enable RLE for long captures. * Without this, captured data present errors. */ v16 |= DS_MODE_RLE_MODE; } WL16(&cfg.mode, v16); v32 = ceil(DS_MAX_LOGIC_SAMPLERATE * 1.0 / devc->cur_samplerate); WL32(&cfg.divider, v32); /* Number of 16-sample units. */ WL32(&cfg.count, devc->limit_samples / 16); set_trigger(sdi, &cfg); len = sizeof(struct dslogic_fpga_config); ret = libusb_bulk_transfer(usb->devhdl, 2 | LIBUSB_ENDPOINT_OUT, (unsigned char *)&cfg, len, &transferred, USB_TIMEOUT); if (ret < 0 || transferred != len) { sr_err("Failed to send FPGA configuration: %s.", libusb_error_name(ret)); return SR_ERR; } return SR_OK; } SR_PRIV int dslogic_set_voltage_threshold(const struct sr_dev_inst *sdi, double threshold) { int ret; struct dev_context *const devc = sdi->priv; const struct sr_usb_dev_inst *const usb = sdi->conn; const uint8_t value = (threshold / 5.0) * 255; const uint16_t cmd = value | (DS_ADDR_VTH << 8); /* Send the control command. */ ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT, DS_CMD_WR_REG, 0x0000, 0x0000, (unsigned char *)&cmd, sizeof(cmd), 3000); if (ret < 0) { sr_err("Unable to set voltage-threshold register: %s.", libusb_error_name(ret)); return SR_ERR; } devc->cur_threshold = threshold; return SR_OK; } SR_PRIV int dslogic_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, i, device_count; uint8_t revid; char connection_id[64]; drvc = di->context; devc = sdi->priv; usb = sdi->conn; if (sdi->status == SR_ST_ACTIVE) /* Device is already in use. */ return SR_ERR; 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++) { 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. */ usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); if (strcmp(sdi->connection_id, connection_id)) /* 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; } if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) { if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) { if ((ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE)) < 0) { sr_err("Failed to detach kernel driver: %s.", libusb_error_name(ret)); return SR_ERR; } } } 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 != DSLOGIC_REQUIRED_VERSION_MAJOR) { sr_err("Expected firmware version %d.x, " "got %d.%d.", DSLOGIC_REQUIRED_VERSION_MAJOR, vi.major, vi.minor); break; } sdi->status = SR_ST_ACTIVE; sr_info("Opened device on %d.%d (logical) / %s (physical), " "interface %d, firmware %d.%d.", usb->bus, usb->address, connection_id, 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 *dslogic_dev_new(void) { struct dev_context *devc; devc = g_malloc0(sizeof(struct dev_context)); devc->profile = NULL; devc->fw_updated = 0; devc->cur_samplerate = 0; devc->limit_samples = 0; devc->capture_ratio = 0; devc->continuous_mode = FALSE; devc->clock_edge = DS_EDGE_RISING; return devc; } static void 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 dev_context *devc; devc = sdi->priv; std_session_send_df_end(sdi); usb_source_remove(sdi->session, devc->ctx); devc->num_transfers = 0; g_free(devc->transfers); } 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); } static void send_data(struct sr_dev_inst *sdi, uint8_t *data, size_t length, size_t sample_width) { const struct sr_datafeed_logic logic = { .length = length, .unitsize = sample_width, .data = data }; const struct sr_datafeed_packet packet = { .type = SR_DF_LOGIC, .payload = &logic }; sr_session_send(sdi, &packet); } static void LIBUSB_CALL 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; unsigned int num_samples; int trigger_offset, cur_sample_count; const int unitsize = 2; 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_dbg("receive_transfer(): status %s received %d bytes.", libusb_error_name(transfer->status), transfer->actual_length); /* Save incoming transfer before reusing the transfer struct. */ cur_sample_count = transfer->actual_length / unitsize; 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; } if (!devc->limit_samples || devc->sent_samples < devc->limit_samples) { /* Send the incoming transfer to the session bus. */ if (devc->limit_samples && devc->sent_samples + cur_sample_count > devc->limit_samples) num_samples = devc->limit_samples - devc->sent_samples; else num_samples = cur_sample_count; if (devc->trigger_pos > devc->sent_samples && devc->trigger_pos <= devc->sent_samples + num_samples) { /* DSLogic trigger in this block. Send trigger position. */ trigger_offset = devc->trigger_pos - devc->sent_samples; /* Pre-trigger samples. */ send_data(sdi, (uint8_t *)transfer->buffer, trigger_offset * unitsize, unitsize); devc->sent_samples += trigger_offset; /* Trigger position. */ devc->trigger_pos = 0; packet.type = SR_DF_TRIGGER; packet.payload = NULL; sr_session_send(sdi, &packet); /* Post trigger samples. */ num_samples -= trigger_offset; send_data(sdi, (uint8_t *)transfer->buffer + trigger_offset * unitsize, num_samples * unitsize, unitsize); devc->sent_samples += num_samples; } else { send_data(sdi, (uint8_t *)transfer->buffer, num_samples * unitsize, unitsize); devc->sent_samples += num_samples; } } if (devc->limit_samples && devc->sent_samples >= devc->limit_samples) { abort_acquisition(devc); free_transfer(transfer); } else resubmit_transfer(transfer); } static int receive_data(int fd, int revents, void *cb_data) { struct timeval tv; struct drv_context *drvc; (void)fd; (void)revents; drvc = (struct drv_context *)cb_data; tv.tv_sec = tv.tv_usec = 0; libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); return TRUE; } static size_t to_bytes_per_ms(const struct sr_dev_inst *sdi) { const struct dev_context *const devc = sdi->priv; const size_t ch_count = enabled_channel_count(sdi); if (devc->continuous_mode) return (devc->cur_samplerate * ch_count) / (1000 * 8); /* If we're in buffered mode, the transfer rate is not so important, * but we expect to get at least 10% of the high-speed USB bandwidth. */ return 35000000 / (1000 * 10); } static size_t get_buffer_size(const struct sr_dev_inst *sdi) { /* * The buffer should be large enough to hold 10ms of data and * a multiple of the size of a data atom. */ const size_t block_size = enabled_channel_count(sdi) * 512; const size_t s = 10 * to_bytes_per_ms(sdi); return ((s + block_size - 1) / block_size) * block_size; } static unsigned int get_number_of_transfers(const struct sr_dev_inst *sdi) { /* Total buffer size should be able to hold about 100ms of data. */ const unsigned int s = get_buffer_size(sdi); const unsigned int n = (100 * to_bytes_per_ms(sdi) + s - 1) / s; return (n > NUM_SIMUL_TRANSFERS) ? NUM_SIMUL_TRANSFERS : n; } static unsigned int get_timeout(const struct sr_dev_inst *sdi) { const size_t total_size = get_buffer_size(sdi) * get_number_of_transfers(sdi); const unsigned int timeout = total_size / to_bytes_per_ms(sdi); return timeout + timeout / 4; /* Leave a headroom of 25% percent. */ } static int start_transfers(const struct sr_dev_inst *sdi) { const size_t size = get_buffer_size(sdi); const unsigned int num_transfers = get_number_of_transfers(sdi); const unsigned int timeout = get_timeout(sdi); struct dev_context *devc; struct sr_usb_dev_inst *usb; struct libusb_transfer *transfer; unsigned int i; int ret; unsigned char *buf; devc = sdi->priv; usb = sdi->conn; devc->sent_samples = 0; devc->acq_aborted = FALSE; devc->empty_transfer_count = 0; devc->submitted_transfers = 0; g_free(devc->transfers); devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers); if (!devc->transfers) { sr_err("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("USB transfer buffer malloc failed."); return SR_ERR_MALLOC; } transfer = libusb_alloc_transfer(0); libusb_fill_bulk_transfer(transfer, usb->devhdl, 6 | LIBUSB_ENDPOINT_IN, buf, size, receive_transfer, (void *)sdi, timeout); sr_info("submitting transfer: %d", i); 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++; } std_session_send_df_header(sdi); return SR_OK; } static void LIBUSB_CALL trigger_receive(struct libusb_transfer *transfer) { const struct sr_dev_inst *sdi; struct dslogic_trigger_pos *tpos; struct dev_context *devc; sdi = transfer->user_data; devc = sdi->priv; if (transfer->status == LIBUSB_TRANSFER_CANCELLED) { sr_dbg("Trigger transfer canceled."); /* Terminate session. */ std_session_send_df_end(sdi); usb_source_remove(sdi->session, devc->ctx); devc->num_transfers = 0; g_free(devc->transfers); } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED && transfer->actual_length == sizeof(struct dslogic_trigger_pos)) { tpos = (struct dslogic_trigger_pos *)transfer->buffer; sr_info("tpos real_pos %d ram_saddr %d cnt %d", tpos->real_pos, tpos->ram_saddr, tpos->remain_cnt); devc->trigger_pos = tpos->real_pos; g_free(tpos); start_transfers(sdi); } libusb_free_transfer(transfer); } SR_PRIV int dslogic_acquisition_start(const struct sr_dev_inst *sdi) { const unsigned int timeout = get_timeout(sdi); struct sr_dev_driver *di; struct drv_context *drvc; struct dev_context *devc; struct sr_usb_dev_inst *usb; struct dslogic_trigger_pos *tpos; struct libusb_transfer *transfer; int ret; if (sdi->status != SR_ST_ACTIVE) return SR_ERR_DEV_CLOSED; di = sdi->driver; drvc = di->context; devc = sdi->priv; usb = sdi->conn; devc->ctx = drvc->sr_ctx; devc->sent_samples = 0; devc->empty_transfer_count = 0; devc->acq_aborted = FALSE; usb_source_add(sdi->session, devc->ctx, timeout, receive_data, drvc); if ((ret = command_stop_acquisition(sdi)) != SR_OK) return ret; if ((ret = fpga_configure(sdi)) != SR_OK) return ret; if ((ret = command_start_acquisition(sdi)) != SR_OK) return ret; sr_dbg("Getting trigger."); tpos = g_malloc(sizeof(struct dslogic_trigger_pos)); transfer = libusb_alloc_transfer(0); libusb_fill_bulk_transfer(transfer, usb->devhdl, 6 | LIBUSB_ENDPOINT_IN, (unsigned char *)tpos, sizeof(struct dslogic_trigger_pos), trigger_receive, (void *)sdi, 0); if ((ret = libusb_submit_transfer(transfer)) < 0) { sr_err("Failed to request trigger: %s.", libusb_error_name(ret)); libusb_free_transfer(transfer); g_free(tpos); return SR_ERR; } devc->transfers = g_try_malloc0(sizeof(*devc->transfers)); if (!devc->transfers) { sr_err("USB trigger_pos transfer malloc failed."); return SR_ERR_MALLOC; } devc->num_transfers = 1; devc->submitted_transfers++; devc->transfers[0] = transfer; return ret; } SR_PRIV int dslogic_acquisition_stop(struct sr_dev_inst *sdi) { command_stop_acquisition(sdi); abort_acquisition(sdi->priv); return SR_OK; }