2 * This file is part of the libsigrok project.
4 * Copyright (C) 2020 Florian Schmidt <schmidt_florian@gmx.de>
5 * Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
6 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
7 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation, either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include <libsigrok/libsigrok.h>
28 #include "libsigrok-internal.h"
31 #define UC_FIRMWARE "kingst-la-%04x.fw"
32 #define FPGA_FW_LA2016 "kingst-la2016-fpga.bitstream"
33 #define FPGA_FW_LA2016A "kingst-la2016a1-fpga.bitstream"
34 #define FPGA_FW_LA1016 "kingst-la1016-fpga.bitstream"
35 #define FPGA_FW_LA1016A "kingst-la1016a1-fpga.bitstream"
37 #define MAX_SAMPLE_RATE_LA2016 SR_MHZ(200)
38 #define MAX_SAMPLE_RATE_LA1016 SR_MHZ(100)
39 #define MAX_SAMPLE_DEPTH 10e9
40 #define MAX_PWM_FREQ SR_MHZ(20)
41 #define PWM_CLOCK SR_MHZ(200) /* 200MHz for both LA2016 and LA1016 */
43 /* USB vendor class control requests, executed by the Cypress FX2 MCU. */
44 #define CMD_FPGA_ENABLE 0x10
45 #define CMD_FPGA_SPI 0x20 /* R/W access to FPGA registers via SPI. */
46 #define CMD_BULK_START 0x30 /* Start sample data download via USB EP6 IN. */
47 #define CMD_BULK_RESET 0x38 /* Flush FIFO of FX2 USB EP6 IN. */
48 #define CMD_FPGA_INIT 0x50 /* Used before and after FPGA bitstream upload. */
49 #define CMD_KAUTH 0x60 /* Communicate to auth IC (U10). Not used. */
50 #define CMD_EEPROM 0xa2 /* R/W access to EEPROM content. */
53 * FPGA register addresses (base addresses when registers span multiple
54 * bytes, in that case data is kept in little endian format). Passed to
55 * CMD_FPGA_SPI requests. The FX2 MCU transparently handles the detail
56 * of SPI transfers encoding the read (1) or write (0) direction in the
57 * MSB of the address field. There are some 60 byte-wide FPGA registers.
59 * Unfortunately the FPGA registers change their meaning between the
60 * read and write directions of access, or exclusively provide one of
61 * these directions and not the other. This is an arbitrary vendor's
62 * choice, there is nothing which the sigrok driver could do about it.
63 * Values written to registers typically cannot get read back, neither
64 * verified after writing a configuration, nor queried upon startup for
65 * automatic detection of the current configuration. Neither appear to
66 * be there echo registers for presence and communication checks, nor
67 * version identifying registers, as far as we know.
69 #define REG_RUN 0x00 /* Read capture status, write start capture. */
70 #define REG_PWM_EN 0x02 /* User PWM channels on/off. */
71 #define REG_CAPT_MODE 0x03 /* Write 0x00 capture to SDRAM, 0x01 streaming. */
72 #define REG_BULK 0x08 /* Write start addr, byte count to download samples. */
73 #define REG_SAMPLING 0x10 /* Write capture config, read capture SDRAM location. */
74 #define REG_TRIGGER 0x20 /* write level and edge trigger config. */
75 #define REG_THRESHOLD 0x68 /* Write PWM config to setup input threshold DAC. */
76 #define REG_PWM1 0x70 /* Write config for user PWM1. */
77 #define REG_PWM2 0x78 /* Write config for user PWM2. */
79 static int ctrl_in(const struct sr_dev_inst *sdi,
80 uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
81 void *data, uint16_t wLength)
83 struct sr_usb_dev_inst *usb;
88 if ((ret = libusb_control_transfer(
89 usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN,
90 bRequest, wValue, wIndex, (unsigned char *)data, wLength,
91 DEFAULT_TIMEOUT_MS)) != wLength) {
92 sr_dbg("USB ctrl in: %d bytes, req %d val %#x idx %d: %s.",
93 wLength, bRequest, wValue, wIndex,
94 libusb_error_name(ret));
95 sr_err("Cannot read %d bytes from USB: %s.",
96 wLength, libusb_error_name(ret));
103 static int ctrl_out(const struct sr_dev_inst *sdi,
104 uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
105 void *data, uint16_t wLength)
107 struct sr_usb_dev_inst *usb;
112 if ((ret = libusb_control_transfer(
113 usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT,
114 bRequest, wValue, wIndex, (unsigned char*)data, wLength,
115 DEFAULT_TIMEOUT_MS)) != wLength) {
116 sr_dbg("USB ctrl out: %d bytes, req %d val %#x idx %d: %s.",
117 wLength, bRequest, wValue, wIndex,
118 libusb_error_name(ret));
119 sr_err("Cannot write %d bytes to USB: %s.",
120 wLength, libusb_error_name(ret));
128 * Check the necessity for FPGA bitstream upload, because another upload
129 * would take some 600ms which is undesirable after program startup. Try
130 * to access some FPGA registers and check the values' plausibility. The
131 * check should fail on the safe side, request another upload when in
132 * doubt. A positive response (the request to continue operation with the
133 * currently active bitstream) should be conservative. Accessing multiple
134 * registers is considered cheap compared to the cost of bitstream upload.
136 * It helps though that both the vendor software and the sigrok driver
137 * use the same bundle of MCU firmware and FPGA bitstream for any of the
138 * supported models. We don't expect to successfully communicate to the
139 * device yet disagree on its protocol. Ideally we would access version
140 * identifying registers for improved robustness, but are not aware of
141 * any. A bitstream reload can always be forced by a power cycle.
143 static int check_fpga_bitstream(const struct sr_dev_inst *sdi)
150 uint8_t buff[sizeof(run_state)];
151 const uint8_t *rdptr;
153 sr_dbg("Checking operation of the FPGA bitstream.");
156 ret = ctrl_in(sdi, CMD_FPGA_INIT, 0x00, 0, &init_rsp, sizeof(init_rsp));
157 if (ret != SR_OK || init_rsp != 0) {
158 sr_dbg("FPGA init query failed, or unexpected response.");
162 read_len = sizeof(run_state);
163 ret = ctrl_in(sdi, CMD_FPGA_SPI, REG_RUN, 0, buff, read_len);
165 sr_dbg("FPGA register access failed (run state).");
169 run_state = read_u16le_inc(&rdptr);
170 sr_spew("FPGA register: run state 0x%04x.", run_state);
171 if (run_state && (run_state & 0x3) != 0x1) {
172 sr_dbg("Unexpected FPGA register content (run state).");
175 if (run_state && (run_state & ~0xf) != 0x85e0) {
176 sr_dbg("Unexpected FPGA register content (run state).");
180 read_len = sizeof(pwm_en);
181 ret = ctrl_in(sdi, CMD_FPGA_SPI, REG_PWM_EN, 0, buff, read_len);
183 sr_dbg("FPGA register access failed (PWM enable).");
187 pwm_en = read_u8_inc(&rdptr);
188 sr_spew("FPGA register: PWM enable 0x%02x.", pwm_en);
189 if ((pwm_en & 0x3) != 0x0) {
190 sr_dbg("Unexpected FPGA register content (PWM enable).");
194 sr_info("Could re-use current FPGA bitstream. No upload required.");
198 static int upload_fpga_bitstream(const struct sr_dev_inst *sdi,
199 const char *bitstream_fname)
201 struct drv_context *drvc;
202 struct sr_usb_dev_inst *usb;
203 struct sr_resource bitstream;
204 uint32_t bitstream_size;
205 uint8_t buffer[sizeof(uint32_t)];
211 unsigned int zero_pad_to;
213 drvc = sdi->driver->context;
216 sr_info("Uploading FPGA bitstream '%s'.", bitstream_fname);
218 ret = sr_resource_open(drvc->sr_ctx, &bitstream, SR_RESOURCE_FIRMWARE, bitstream_fname);
220 sr_err("Cannot find FPGA bitstream %s.", bitstream_fname);
224 bitstream_size = (uint32_t)bitstream.size;
226 write_u32le_inc(&wrptr, bitstream_size);
227 if ((ret = ctrl_out(sdi, CMD_FPGA_INIT, 0x00, 0, buffer, wrptr - buffer)) != SR_OK) {
228 sr_err("Cannot initiate FPGA bitstream upload.");
229 sr_resource_close(drvc->sr_ctx, &bitstream);
232 zero_pad_to = bitstream_size;
233 zero_pad_to += LA2016_EP2_PADDING - 1;
234 zero_pad_to /= LA2016_EP2_PADDING;
235 zero_pad_to *= LA2016_EP2_PADDING;
239 if (pos < bitstream.size) {
240 len = (int)sr_resource_read(drvc->sr_ctx, &bitstream, &block, sizeof(block));
242 sr_err("Cannot read FPGA bitstream.");
243 sr_resource_close(drvc->sr_ctx, &bitstream);
247 /* Zero-pad until 'zero_pad_to'. */
248 len = zero_pad_to - pos;
249 if ((unsigned)len > sizeof(block))
251 memset(&block, 0, len);
256 ret = libusb_bulk_transfer(usb->devhdl, 2,
257 &block[0], len, &act_len, DEFAULT_TIMEOUT_MS);
259 sr_dbg("Cannot write FPGA bitstream, block %#x len %d: %s.",
260 pos, (int)len, libusb_error_name(ret));
264 if (act_len != len) {
265 sr_dbg("Short write for FPGA bitstream, block %#x len %d: got %d.",
266 pos, (int)len, act_len);
272 sr_resource_close(drvc->sr_ctx, &bitstream);
275 sr_info("FPGA bitstream upload (%" PRIu64 " bytes) done.",
281 static int enable_fpga_bitstream(const struct sr_dev_inst *sdi)
286 if ((ret = ctrl_in(sdi, CMD_FPGA_INIT, 0x00, 0, &cmd_resp, sizeof(cmd_resp))) != SR_OK) {
287 sr_err("Cannot read response after FPGA bitstream upload.");
291 sr_err("Unexpected FPGA bitstream upload response, got 0x%02x, want 0.",
297 if ((ret = ctrl_out(sdi, CMD_FPGA_ENABLE, 0x01, 0, NULL, 0)) != SR_OK) {
298 sr_err("Cannot enable FPGA after bitstream upload.");
306 static int set_threshold_voltage(const struct sr_dev_inst *sdi, float voltage)
308 struct dev_context *devc;
313 uint16_t duty_R79, duty_R56;
314 uint8_t buf[2 * sizeof(uint16_t)];
317 /* Clamp threshold setting to valid range for LA2016. */
320 } else if (voltage < -4.0) {
325 * Two PWM output channels feed one DAC which generates a bias
326 * voltage, which offsets the input probe's voltage level, and
327 * in combination with the FPGA pins' fixed threshold result in
328 * a programmable input threshold from the user's perspective.
329 * The PWM outputs can be seen on R79 and R56 respectively, the
330 * frequency is 100kHz and the duty cycle varies. The R79 PWM
331 * uses three discrete settings. The R56 PWM varies with desired
332 * thresholds and depends on the R79 PWM configuration. See the
333 * schematics comments which discuss the formulae.
335 if (voltage >= 2.9) {
336 duty_R79 = 0; /* PWM off (0V). */
337 duty_R56 = (uint16_t)(302 * voltage - 363);
338 } else if (voltage <= -0.4) {
339 duty_R79 = 0x02d7; /* 72% duty cycle. */
340 duty_R56 = (uint16_t)(302 * voltage + 1090);
342 duty_R79 = 0x00f2; /* 25% duty cycle. */
343 duty_R56 = (uint16_t)(302 * voltage + 121);
346 /* Clamp duty register values to sensible limits. */
349 } else if (duty_R56 > 1100) {
353 sr_dbg("Set threshold voltage %.2fV.", voltage);
354 sr_dbg("Duty cycle values: R56 0x%04x, R79 0x%04x.", duty_R56, duty_R79);
357 write_u16le_inc(&wrptr, duty_R56);
358 write_u16le_inc(&wrptr, duty_R79);
360 ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_THRESHOLD, 0, buf, wrptr - buf);
362 sr_err("Cannot set threshold voltage %.2fV.", voltage);
365 devc->threshold_voltage = voltage;
370 static int enable_pwm(const struct sr_dev_inst *sdi, uint8_t p1, uint8_t p2)
372 struct dev_context *devc;
379 if (p1) cfg |= 1 << 0;
380 if (p2) cfg |= 1 << 1;
382 sr_dbg("Set PWM enable %d %d. Config 0x%02x.", p1, p2, cfg);
383 ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_PWM_EN, 0, &cfg, sizeof(cfg));
385 sr_err("Cannot setup PWM enabled state.");
388 devc->pwm_setting[0].enabled = (p1) ? 1 : 0;
389 devc->pwm_setting[1].enabled = (p2) ? 1 : 0;
394 static int set_pwm(const struct sr_dev_inst *sdi, uint8_t which,
395 float freq, float duty)
397 int CTRL_PWM[] = { REG_PWM1, REG_PWM2 };
398 struct dev_context *devc;
399 pwm_setting_dev_t cfg;
400 pwm_setting_t *setting;
402 uint8_t buf[2 * sizeof(uint32_t)];
407 if (which < 1 || which > 2) {
408 sr_err("Invalid PWM channel: %d.", which);
411 if (freq > MAX_PWM_FREQ) {
412 sr_err("Too high a PWM frequency: %.1f.", freq);
415 if (duty > 100 || duty < 0) {
416 sr_err("Invalid PWM duty cycle: %f.", duty);
420 cfg.period = (uint32_t)(PWM_CLOCK / freq);
421 cfg.duty = (uint32_t)(0.5f + (cfg.period * duty / 100.));
422 sr_dbg("Set PWM%d period %d, duty %d.", which, cfg.period, cfg.duty);
425 write_u32le_inc(&wrptr, cfg.period);
426 write_u32le_inc(&wrptr, cfg.duty);
427 ret = ctrl_out(sdi, CMD_FPGA_SPI, CTRL_PWM[which - 1], 0, buf, wrptr - buf);
429 sr_err("Cannot setup PWM%d configuration %d %d.",
430 which, cfg.period, cfg.duty);
433 setting = &devc->pwm_setting[which - 1];
434 setting->freq = freq;
435 setting->duty = duty;
440 static int set_defaults(const struct sr_dev_inst *sdi)
442 struct dev_context *devc;
447 devc->capture_ratio = 5; /* percent */
448 devc->cur_channels = 0xffff;
449 devc->limit_samples = 5000000;
450 devc->cur_samplerate = SR_MHZ(100);
452 ret = set_threshold_voltage(sdi, devc->threshold_voltage);
456 ret = enable_pwm(sdi, 0, 0);
460 ret = set_pwm(sdi, 1, 1e3, 50);
464 ret = set_pwm(sdi, 2, 100e3, 50);
468 ret = enable_pwm(sdi, 1, 1);
475 static int set_trigger_config(const struct sr_dev_inst *sdi)
477 struct dev_context *devc;
478 struct sr_trigger *trigger;
482 struct sr_trigger_stage *stage1;
483 struct sr_trigger_match *match;
486 uint8_t buf[4 * sizeof(uint32_t)];
490 trigger = sr_session_trigger_get(sdi->session);
492 memset(&cfg, 0, sizeof(cfg));
494 cfg.channels = devc->cur_channels;
496 if (trigger && trigger->stages) {
497 stages = trigger->stages;
498 stage1 = stages->data;
500 sr_err("Only one trigger stage supported for now.");
503 channel = stage1->matches;
505 match = channel->data;
506 ch_mask = 1 << match->channel->index;
508 switch (match->match) {
509 case SR_TRIGGER_ZERO:
510 cfg.level |= ch_mask;
511 cfg.high_or_falling &= ~ch_mask;
514 cfg.level |= ch_mask;
515 cfg.high_or_falling |= ch_mask;
517 case SR_TRIGGER_RISING:
518 if ((cfg.enabled & ~cfg.level)) {
519 sr_err("Device only supports one edge trigger.");
522 cfg.level &= ~ch_mask;
523 cfg.high_or_falling &= ~ch_mask;
525 case SR_TRIGGER_FALLING:
526 if ((cfg.enabled & ~cfg.level)) {
527 sr_err("Device only supports one edge trigger.");
530 cfg.level &= ~ch_mask;
531 cfg.high_or_falling |= ch_mask;
534 sr_err("Unknown trigger condition.");
537 cfg.enabled |= ch_mask;
538 channel = channel->next;
541 sr_dbg("Set trigger config: "
542 "channels 0x%04x, trigger-enabled 0x%04x, "
543 "level-triggered 0x%04x, high/falling 0x%04x.",
544 cfg.channels, cfg.enabled, cfg.level, cfg.high_or_falling);
546 devc->had_triggers_configured = cfg.enabled != 0;
549 write_u32le_inc(&wrptr, cfg.channels);
550 write_u32le_inc(&wrptr, cfg.enabled);
551 write_u32le_inc(&wrptr, cfg.level);
552 write_u32le_inc(&wrptr, cfg.high_or_falling);
553 ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_TRIGGER, 16, buf, wrptr - buf);
555 sr_err("Cannot setup trigger configuration.");
562 static int set_sample_config(const struct sr_dev_inst *sdi)
564 struct dev_context *devc;
565 double clock_divisor;
569 uint8_t buf[2 * sizeof(uint32_t) + 48 / 8 + sizeof(uint16_t)];
573 total = 128 * 1024 * 1024;
575 if (devc->cur_samplerate > devc->max_samplerate) {
576 sr_err("Too high a sample rate: %" PRIu64 ".",
577 devc->cur_samplerate);
581 clock_divisor = devc->max_samplerate / (double)devc->cur_samplerate;
582 if (clock_divisor > 0xffff)
583 clock_divisor = 0xffff;
584 divisor = (uint16_t)(clock_divisor + 0.5);
585 devc->cur_samplerate = devc->max_samplerate / divisor;
587 if (devc->limit_samples > MAX_SAMPLE_DEPTH) {
588 sr_err("Too high a sample depth: %" PRIu64 ".",
589 devc->limit_samples);
593 devc->pre_trigger_size = (devc->capture_ratio * devc->limit_samples) / 100;
595 sr_dbg("Set sample config: %" PRIu64 "kHz, %" PRIu64 " samples, trigger-pos %" PRIu64 "%%.",
596 devc->cur_samplerate / 1000,
598 devc->capture_ratio);
601 write_u32le_inc(&wrptr, devc->limit_samples);
602 write_u8_inc(&wrptr, 0);
603 write_u32le_inc(&wrptr, devc->pre_trigger_size);
604 write_u32le_inc(&wrptr, ((total * devc->capture_ratio) / 100) & 0xffffff00);
605 write_u16le_inc(&wrptr, divisor);
606 write_u8_inc(&wrptr, 0);
608 ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_SAMPLING, 0, buf, wrptr - buf);
610 sr_err("Cannot setup acquisition configuration.");
618 * FPGA register REG_RUN holds the run state (u16le format). Bit fields
620 * bit 0: value 1 = idle
621 * bit 1: value 1 = writing to SDRAM
622 * bit 2: value 0 = waiting for trigger, 1 = trigger seen
623 * bit 3: value 0 = pretrigger sampling, 1 = posttrigger sampling
624 * The meaning of other bit fields is unknown.
626 * Typical values in order of appearance during execution:
627 * 0x85e2: pre-sampling, samples before the trigger position,
628 * when capture ratio > 0%
629 * 0x85ea: pre-sampling complete, now waiting for the trigger
630 * (whilst sampling continuously)
631 * 0x85ee: trigger seen, capturing post-trigger samples, running
634 static uint16_t run_state(const struct sr_dev_inst *sdi)
637 static uint16_t previous_state = 0;
640 if ((ret = ctrl_in(sdi, CMD_FPGA_SPI, REG_RUN, 0, &state, sizeof(state))) != SR_OK) {
641 sr_err("Cannot read run state.");
646 * Avoid flooding the log, only dump values as they change.
647 * The routine is called about every 50ms.
649 if (state != previous_state) {
650 previous_state = state;
651 if ((state & 0x0003) == 0x01) {
652 sr_dbg("Run state: 0x%04x (%s).", state, "idle");
653 } else if ((state & 0x000f) == 0x02) {
654 sr_dbg("Run state: 0x%04x (%s).", state,
655 "pre-trigger sampling");
656 } else if ((state & 0x000f) == 0x0a) {
657 sr_dbg("Run state: 0x%04x (%s).", state,
658 "sampling, waiting for trigger");
659 } else if ((state & 0x000f) == 0x0e) {
660 sr_dbg("Run state: 0x%04x (%s).", state,
661 "post-trigger sampling");
663 sr_dbg("Run state: 0x%04x.", state);
670 static int set_run_mode(const struct sr_dev_inst *sdi, uint8_t fast_blinking)
674 if ((ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_RUN, 0, &fast_blinking, sizeof(fast_blinking))) != SR_OK) {
675 sr_err("Cannot configure run mode %d.", fast_blinking);
682 static int get_capture_info(const struct sr_dev_inst *sdi)
684 struct dev_context *devc;
686 uint8_t buf[3 * sizeof(uint32_t)];
687 const uint8_t *rdptr;
691 if ((ret = ctrl_in(sdi, CMD_FPGA_SPI, REG_SAMPLING, 0, buf, sizeof(buf))) != SR_OK) {
692 sr_err("Cannot read capture info.");
697 devc->info.n_rep_packets = read_u32le_inc(&rdptr);
698 devc->info.n_rep_packets_before_trigger = read_u32le_inc(&rdptr);
699 devc->info.write_pos = read_u32le_inc(&rdptr);
701 sr_dbg("Capture info: n_rep_packets: 0x%08x/%d, before_trigger: 0x%08x/%d, write_pos: 0x%08x%d.",
702 devc->info.n_rep_packets, devc->info.n_rep_packets,
703 devc->info.n_rep_packets_before_trigger,
704 devc->info.n_rep_packets_before_trigger,
705 devc->info.write_pos, devc->info.write_pos);
707 if (devc->info.n_rep_packets % 5) {
708 sr_warn("Unexpected packets count %lu, not a multiple of 5.",
709 (unsigned long)devc->info.n_rep_packets);
715 SR_PRIV int la2016_upload_firmware(struct sr_context *sr_ctx,
716 libusb_device *dev, uint16_t product_id)
719 snprintf(fw_file, sizeof(fw_file) - 1, UC_FIRMWARE, product_id);
720 return ezusb_upload_firmware(sr_ctx, dev, USB_CONFIGURATION, fw_file);
723 SR_PRIV int la2016_setup_acquisition(const struct sr_dev_inst *sdi)
725 struct dev_context *devc;
731 ret = set_threshold_voltage(sdi, devc->threshold_voltage);
736 if ((ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_CAPT_MODE, 0, &cmd, sizeof(cmd))) != SR_OK) {
737 sr_err("Cannot send command to stop sampling.");
741 ret = set_trigger_config(sdi);
745 ret = set_sample_config(sdi);
752 SR_PRIV int la2016_start_acquisition(const struct sr_dev_inst *sdi)
756 ret = set_run_mode(sdi, 3);
763 static int la2016_stop_acquisition(const struct sr_dev_inst *sdi)
767 ret = set_run_mode(sdi, 0);
774 SR_PRIV int la2016_abort_acquisition(const struct sr_dev_inst *sdi)
777 struct dev_context *devc;
779 ret = la2016_stop_acquisition(sdi);
783 devc = sdi ? sdi->priv : NULL;
784 if (devc && devc->transfer)
785 libusb_cancel_transfer(devc->transfer);
790 static int la2016_has_triggered(const struct sr_dev_inst *sdi)
794 state = run_state(sdi);
796 return (state & 0x3) == 1;
799 static int la2016_start_retrieval(const struct sr_dev_inst *sdi,
800 libusb_transfer_cb_fn cb)
802 struct dev_context *devc;
803 struct sr_usb_dev_inst *usb;
805 uint8_t wrbuf[2 * sizeof(uint32_t)];
813 if ((ret = get_capture_info(sdi)) != SR_OK)
816 devc->n_transfer_packets_to_read = devc->info.n_rep_packets / NUM_PACKETS_IN_CHUNK;
817 devc->n_bytes_to_read = devc->n_transfer_packets_to_read * TRANSFER_PACKET_LENGTH;
818 devc->read_pos = devc->info.write_pos - devc->n_bytes_to_read;
819 devc->n_reps_until_trigger = devc->info.n_rep_packets_before_trigger;
821 sr_dbg("Want to read %u xfer-packets starting from pos %" PRIu32 ".",
822 devc->n_transfer_packets_to_read, devc->read_pos);
824 if ((ret = ctrl_out(sdi, CMD_BULK_RESET, 0x00, 0, NULL, 0)) != SR_OK) {
825 sr_err("Cannot reset USB bulk state.");
828 sr_dbg("Will read from 0x%08lx, 0x%08x bytes.",
829 (unsigned long)devc->read_pos, devc->n_bytes_to_read);
831 write_u32le_inc(&wrptr, devc->read_pos);
832 write_u32le_inc(&wrptr, devc->n_bytes_to_read);
833 if ((ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_BULK, 0, wrbuf, wrptr - wrbuf)) != SR_OK) {
834 sr_err("Cannot send USB bulk config.");
837 if ((ret = ctrl_out(sdi, CMD_BULK_START, 0x00, 0, NULL, 0)) != SR_OK) {
838 sr_err("Cannot unblock USB bulk transfers.");
843 * Pick a buffer size for all USB transfers. The buffer size
844 * must be a multiple of the endpoint packet size. And cannot
845 * exceed a maximum value.
847 to_read = devc->n_bytes_to_read;
848 if (to_read >= LA2016_USB_BUFSZ) /* Multiple transfers. */
849 to_read = LA2016_USB_BUFSZ;
850 else /* One transfer. */
851 to_read = (to_read + (LA2016_EP6_PKTSZ-1)) & ~(LA2016_EP6_PKTSZ-1);
852 buffer = g_try_malloc(to_read);
854 sr_dbg("USB bulk transfer size %d bytes.", (int)to_read);
855 sr_err("Cannot allocate buffer for USB bulk transfer.");
856 return SR_ERR_MALLOC;
859 devc->transfer = libusb_alloc_transfer(0);
860 libusb_fill_bulk_transfer(
861 devc->transfer, usb->devhdl,
862 0x86, buffer, to_read,
863 cb, (void *)sdi, DEFAULT_TIMEOUT_MS);
865 if ((ret = libusb_submit_transfer(devc->transfer)) != 0) {
866 sr_err("Cannot submit USB transfer: %s.", libusb_error_name(ret));
867 libusb_free_transfer(devc->transfer);
868 devc->transfer = NULL;
876 static void send_chunk(struct sr_dev_inst *sdi,
877 const uint8_t *packets, unsigned int num_tfers)
879 struct dev_context *devc;
880 struct sr_datafeed_logic logic;
881 struct sr_datafeed_packet sr_packet;
882 unsigned int max_samples, n_samples, total_samples, free_n_samples;
883 unsigned int i, j, k;
884 int do_signal_trigger;
893 logic.data = devc->convbuffer;
895 sr_packet.type = SR_DF_LOGIC;
896 sr_packet.payload = &logic;
898 max_samples = devc->convbuffer_size / 2;
900 wp = (uint16_t *)devc->convbuffer;
902 do_signal_trigger = 0;
904 if (devc->had_triggers_configured && devc->reading_behind_trigger == 0 && devc->info.n_rep_packets_before_trigger == 0) {
905 std_session_send_df_trigger(sdi);
906 devc->reading_behind_trigger = 1;
910 for (i = 0; i < num_tfers; i++) {
911 for (k = 0; k < NUM_PACKETS_IN_CHUNK; k++) {
912 free_n_samples = max_samples - n_samples;
913 if (free_n_samples < 256 || do_signal_trigger) {
914 logic.length = n_samples * 2;
915 sr_session_send(sdi, &sr_packet);
917 wp = (uint16_t *)devc->convbuffer;
918 if (do_signal_trigger) {
919 std_session_send_df_trigger(sdi);
920 do_signal_trigger = 0;
924 state = read_u16le_inc(&rp);
925 repetitions = read_u8_inc(&rp);
926 for (j = 0; j < repetitions; j++)
929 n_samples += repetitions;
930 total_samples += repetitions;
931 devc->total_samples += repetitions;
932 if (!devc->reading_behind_trigger) {
933 devc->n_reps_until_trigger--;
934 if (devc->n_reps_until_trigger == 0) {
935 devc->reading_behind_trigger = 1;
936 do_signal_trigger = 1;
937 sr_dbg("Trigger position after %" PRIu64 " samples, %.6fms.",
939 (double)devc->total_samples / devc->cur_samplerate * 1e3);
943 (void)read_u8_inc(&rp); /* Skip sequence number. */
946 logic.length = n_samples * 2;
947 sr_session_send(sdi, &sr_packet);
948 if (do_signal_trigger) {
949 std_session_send_df_trigger(sdi);
952 sr_dbg("Send_chunk done after %u samples.", total_samples);
955 static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
957 struct sr_dev_inst *sdi;
958 struct dev_context *devc;
959 struct sr_usb_dev_inst *usb;
962 sdi = transfer->user_data;
966 sr_dbg("receive_transfer(): status %s received %d bytes.",
967 libusb_error_name(transfer->status), transfer->actual_length);
969 if (transfer->status == LIBUSB_TRANSFER_TIMED_OUT) {
970 sr_err("USB bulk transfer timeout.");
971 devc->transfer_finished = 1;
973 send_chunk(sdi, transfer->buffer, transfer->actual_length / TRANSFER_PACKET_LENGTH);
975 devc->n_bytes_to_read -= transfer->actual_length;
976 if (devc->n_bytes_to_read) {
977 uint32_t to_read = devc->n_bytes_to_read;
979 * Determine read size for the next USB transfer. Make
980 * the buffer size a multiple of the endpoint packet
981 * size. Don't exceed a maximum value.
983 if (to_read >= LA2016_USB_BUFSZ)
984 to_read = LA2016_USB_BUFSZ;
986 to_read = (to_read + (LA2016_EP6_PKTSZ-1)) & ~(LA2016_EP6_PKTSZ-1);
987 libusb_fill_bulk_transfer(
988 transfer, usb->devhdl,
989 0x86, transfer->buffer, to_read,
990 receive_transfer, (void *)sdi, DEFAULT_TIMEOUT_MS);
992 if ((ret = libusb_submit_transfer(transfer)) == 0)
994 sr_err("Cannot submit another USB transfer: %s.",
995 libusb_error_name(ret));
998 g_free(transfer->buffer);
999 libusb_free_transfer(transfer);
1000 devc->transfer_finished = 1;
1003 SR_PRIV int la2016_receive_data(int fd, int revents, void *cb_data)
1005 const struct sr_dev_inst *sdi;
1006 struct dev_context *devc;
1007 struct drv_context *drvc;
1015 drvc = sdi->driver->context;
1017 if (devc->have_trigger == 0) {
1018 if (la2016_has_triggered(sdi) == 0) {
1019 /* Not yet ready for sample data download. */
1022 devc->have_trigger = 1;
1023 devc->transfer_finished = 0;
1024 devc->reading_behind_trigger = 0;
1025 devc->total_samples = 0;
1026 /* We can start downloading sample data. */
1027 if (la2016_start_retrieval(sdi, receive_transfer) != SR_OK) {
1028 sr_err("Cannot start acquisition data download.");
1031 sr_dbg("Acquisition data download started.");
1032 std_session_send_df_frame_begin(sdi);
1037 tv.tv_sec = tv.tv_usec = 0;
1038 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
1040 if (devc->transfer_finished) {
1041 sr_dbg("Download finished, post processing.");
1042 std_session_send_df_frame_end(sdi);
1044 usb_source_remove(sdi->session, drvc->sr_ctx);
1045 std_session_send_df_end(sdi);
1047 la2016_stop_acquisition(sdi);
1049 g_free(devc->convbuffer);
1050 devc->convbuffer = NULL;
1052 devc->transfer = NULL;
1054 sr_dbg("Download finished, done post processing.");
1060 SR_PRIV int la2016_init_device(const struct sr_dev_inst *sdi)
1062 struct dev_context *devc;
1065 int16_t purchase_date_bcd[2];
1067 const char *bitstream_fn;
1073 * Four EEPROM bytes at offset 0x20 are purchase year and month
1074 * in BCD format, with 16bit complemented checksum. For example
1075 * 20 04 df fb translates to 2020-04. This can help identify the
1076 * age of devices when unknown magic numbers are seen.
1078 if ((ret = ctrl_in(sdi, CMD_EEPROM, 0x20, 0, purchase_date_bcd, sizeof(purchase_date_bcd))) != SR_OK) {
1079 sr_err("Cannot read purchase date in EEPROM.");
1081 sr_dbg("Purchase date: 20%02hx-%02hx.",
1082 (purchase_date_bcd[0]) & 0xff,
1083 (purchase_date_bcd[0] >> 8) & 0xff);
1084 if (purchase_date_bcd[0] != (0x0ffff & ~purchase_date_bcd[1])) {
1085 sr_err("Purchase date fails checksum test.");
1090 * Several Kingst logic analyzer devices share the same USB VID
1091 * and PID. The product ID determines which MCU firmware to load.
1092 * The MCU firmware provides access to EEPROM content which then
1093 * allows to identify the device model. Which in turn determines
1094 * which FPGA bitstream to load. Eight bytes at offset 0x08 are
1097 * EEPROM content for model identification is kept redundantly
1098 * in memory. The values are stored in verbatim and in inverted
1099 * form, multiple copies are kept at different offsets. Example
1110 * Exclusively inspecting the magic byte appears to be sufficient,
1111 * other fields seem to be 'don't care'.
1113 * magic 2 == LA2016 using "kingst-la2016-fpga.bitstream"
1114 * magic 3 == LA1016 using "kingst-la1016-fpga.bitstream"
1115 * magic 8 == LA2016a using "kingst-la2016a1-fpga.bitstream"
1116 * (latest v1.3.0 PCB, perhaps others)
1117 * magic 9 == LA1016a using "kingst-la1016a1-fpga.bitstream"
1118 * (latest v1.3.0 PCB, perhaps others)
1120 * When EEPROM content does not match the hardware configuration
1121 * (the board layout), the software may load but yield incorrect
1122 * results (like swapped channels). The FPGA bitstream itself
1123 * will authenticate with IC U10 and fail when its capabilities
1124 * do not match the hardware model. An LA1016 won't become a
1125 * LA2016 by faking its EEPROM content.
1127 if ((ret = ctrl_in(sdi, CMD_EEPROM, 0x08, 0, &buf, sizeof(buf))) != SR_OK) {
1128 sr_err("Cannot read EEPROM device identifier bytes.");
1133 if (buf[0] == (0xff & ~buf[1])) {
1134 /* Primary copy of magic passes complement check. */
1136 } else if (buf[4] == (0xff & ~buf[5])) {
1137 /* Backup copy of magic passes complement check. */
1138 sr_dbg("Using backup copy of device type magic number.");
1142 sr_dbg("Device type: magic number is %hhu.", magic);
1144 /* Select the FPGA bitstream depending on the model. */
1147 bitstream_fn = FPGA_FW_LA2016;
1148 devc->max_samplerate = MAX_SAMPLE_RATE_LA2016;
1151 bitstream_fn = FPGA_FW_LA1016;
1152 devc->max_samplerate = MAX_SAMPLE_RATE_LA1016;
1155 bitstream_fn = FPGA_FW_LA2016A;
1156 devc->max_samplerate = MAX_SAMPLE_RATE_LA2016;
1159 bitstream_fn = FPGA_FW_LA1016A;
1160 devc->max_samplerate = MAX_SAMPLE_RATE_LA1016;
1163 bitstream_fn = NULL;
1166 if (!bitstream_fn || !*bitstream_fn) {
1167 sr_err("Cannot identify as one of the supported models.");
1171 if (check_fpga_bitstream(sdi) != SR_OK) {
1172 ret = upload_fpga_bitstream(sdi, bitstream_fn);
1174 sr_err("Cannot upload FPGA bitstream.");
1178 ret = enable_fpga_bitstream(sdi);
1180 sr_err("Cannot enable FPGA bitstream after upload.");
1184 state = run_state(sdi);
1185 if (state != 0x85e9) {
1186 sr_warn("Unexpected run state, want 0x85e9, got 0x%04x.", state);
1189 if ((ret = ctrl_out(sdi, CMD_BULK_RESET, 0x00, 0, NULL, 0)) != SR_OK) {
1190 sr_err("Cannot reset USB bulk transfer.");
1194 sr_dbg("Device should be initialized.");
1196 return set_defaults(sdi);
1199 SR_PRIV int la2016_deinit_device(const struct sr_dev_inst *sdi)
1203 if ((ret = ctrl_out(sdi, CMD_FPGA_ENABLE, 0x00, 0, NULL, 0)) != SR_OK) {
1204 sr_err("Cannot deinitialize device's FPGA.");