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 dev_context *devc;
202 struct drv_context *drvc;
203 struct sr_usb_dev_inst *usb;
204 struct sr_resource bitstream;
205 uint8_t buffer[sizeof(uint32_t)];
211 unsigned int zero_pad_to = 0x2c000;
214 drvc = sdi->driver->context;
217 sr_info("Uploading FPGA bitstream '%s'.", bitstream_fname);
219 ret = sr_resource_open(drvc->sr_ctx, &bitstream, SR_RESOURCE_FIRMWARE, bitstream_fname);
221 sr_err("Cannot find FPGA bitstream %s.", bitstream_fname);
225 devc->bitstream_size = (uint32_t)bitstream.size;
227 write_u32le_inc(&wrptr, devc->bitstream_size);
228 if ((ret = ctrl_out(sdi, CMD_FPGA_INIT, 0x00, 0, buffer, wrptr - buffer)) != SR_OK) {
229 sr_err("Cannot initiate FPGA bitstream upload.");
230 sr_resource_close(drvc->sr_ctx, &bitstream);
236 if (pos < bitstream.size) {
237 len = (int)sr_resource_read(drvc->sr_ctx, &bitstream, &block, sizeof(block));
239 sr_err("Cannot read FPGA bitstream.");
240 sr_resource_close(drvc->sr_ctx, &bitstream);
244 /* Zero-pad until 'zero_pad_to'. */
245 len = zero_pad_to - pos;
246 if ((unsigned)len > sizeof(block))
248 memset(&block, 0, len);
253 ret = libusb_bulk_transfer(usb->devhdl, 2,
254 &block[0], len, &act_len, DEFAULT_TIMEOUT_MS);
256 sr_dbg("Cannot write FPGA bitstream, block %#x len %d: %s.",
257 pos, (int)len, libusb_error_name(ret));
261 if (act_len != len) {
262 sr_dbg("Short write for FPGA bitstream, block %#x len %d: got %d.",
263 pos, (int)len, act_len);
269 sr_resource_close(drvc->sr_ctx, &bitstream);
272 sr_info("FPGA bitstream upload (%" PRIu64 " bytes) done.",
278 static int enable_fpga_bitstream(const struct sr_dev_inst *sdi)
283 if ((ret = ctrl_in(sdi, CMD_FPGA_INIT, 0x00, 0, &cmd_resp, sizeof(cmd_resp))) != SR_OK) {
284 sr_err("Cannot read response after FPGA bitstream upload.");
288 sr_err("Unexpected FPGA bitstream upload response, got 0x%02x, want 0.",
294 if ((ret = ctrl_out(sdi, CMD_FPGA_ENABLE, 0x01, 0, NULL, 0)) != SR_OK) {
295 sr_err("Cannot enable FPGA after bitstream upload.");
303 static int set_threshold_voltage(const struct sr_dev_inst *sdi, float voltage)
305 struct dev_context *devc;
310 uint16_t duty_R79, duty_R56;
311 uint8_t buf[2 * sizeof(uint16_t)];
314 /* Clamp threshold setting to valid range for LA2016. */
317 } else if (voltage < -4.0) {
322 * Two PWM output channels feed one DAC which generates a bias
323 * voltage, which offsets the input probe's voltage level, and
324 * in combination with the FPGA pins' fixed threshold result in
325 * a programmable input threshold from the user's perspective.
326 * The PWM outputs can be seen on R79 and R56 respectively, the
327 * frequency is 100kHz and the duty cycle varies. The R79 PWM
328 * uses three discrete settings. The R56 PWM varies with desired
329 * thresholds and depends on the R79 PWM configuration. See the
330 * schematics comments which discuss the formulae.
332 if (voltage >= 2.9) {
333 duty_R79 = 0; /* PWM off (0V). */
334 duty_R56 = (uint16_t)(302 * voltage - 363);
335 } else if (voltage <= -0.4) {
336 duty_R79 = 0x02d7; /* 72% duty cycle. */
337 duty_R56 = (uint16_t)(302 * voltage + 1090);
339 duty_R79 = 0x00f2; /* 25% duty cycle. */
340 duty_R56 = (uint16_t)(302 * voltage + 121);
343 /* Clamp duty register values to sensible limits. */
346 } else if (duty_R56 > 1100) {
350 sr_dbg("Set threshold voltage %.2fV.", voltage);
351 sr_dbg("Duty cycle values: R56 0x%04x, R79 0x%04x.", duty_R56, duty_R79);
354 write_u16le_inc(&wrptr, duty_R56);
355 write_u16le_inc(&wrptr, duty_R79);
357 ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_THRESHOLD, 0, buf, wrptr - buf);
359 sr_err("Cannot set threshold voltage %.2fV.", voltage);
362 devc->threshold_voltage = voltage;
367 static int enable_pwm(const struct sr_dev_inst *sdi, uint8_t p1, uint8_t p2)
369 struct dev_context *devc;
376 if (p1) cfg |= 1 << 0;
377 if (p2) cfg |= 1 << 1;
379 sr_dbg("Set PWM enable %d %d. Config 0x%02x.", p1, p2, cfg);
380 ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_PWM_EN, 0, &cfg, sizeof(cfg));
382 sr_err("Cannot setup PWM enabled state.");
385 devc->pwm_setting[0].enabled = (p1) ? 1 : 0;
386 devc->pwm_setting[1].enabled = (p2) ? 1 : 0;
391 static int set_pwm(const struct sr_dev_inst *sdi, uint8_t which,
392 float freq, float duty)
394 int CTRL_PWM[] = { REG_PWM1, REG_PWM2 };
395 struct dev_context *devc;
396 pwm_setting_dev_t cfg;
397 pwm_setting_t *setting;
399 uint8_t buf[2 * sizeof(uint32_t)];
404 if (which < 1 || which > 2) {
405 sr_err("Invalid PWM channel: %d.", which);
408 if (freq > MAX_PWM_FREQ) {
409 sr_err("Too high a PWM frequency: %.1f.", freq);
412 if (duty > 100 || duty < 0) {
413 sr_err("Invalid PWM duty cycle: %f.", duty);
417 cfg.period = (uint32_t)(PWM_CLOCK / freq);
418 cfg.duty = (uint32_t)(0.5f + (cfg.period * duty / 100.));
419 sr_dbg("Set PWM%d period %d, duty %d.", which, cfg.period, cfg.duty);
422 write_u32le_inc(&wrptr, cfg.period);
423 write_u32le_inc(&wrptr, cfg.duty);
424 ret = ctrl_out(sdi, CMD_FPGA_SPI, CTRL_PWM[which - 1], 0, buf, wrptr - buf);
426 sr_err("Cannot setup PWM%d configuration %d %d.",
427 which, cfg.period, cfg.duty);
430 setting = &devc->pwm_setting[which - 1];
431 setting->freq = freq;
432 setting->duty = duty;
437 static int set_defaults(const struct sr_dev_inst *sdi)
439 struct dev_context *devc;
444 devc->capture_ratio = 5; /* percent */
445 devc->cur_channels = 0xffff;
446 devc->limit_samples = 5000000;
447 devc->cur_samplerate = SR_MHZ(100);
449 ret = set_threshold_voltage(sdi, devc->threshold_voltage);
453 ret = enable_pwm(sdi, 0, 0);
457 ret = set_pwm(sdi, 1, 1e3, 50);
461 ret = set_pwm(sdi, 2, 100e3, 50);
465 ret = enable_pwm(sdi, 1, 1);
472 static int set_trigger_config(const struct sr_dev_inst *sdi)
474 struct dev_context *devc;
475 struct sr_trigger *trigger;
479 struct sr_trigger_stage *stage1;
480 struct sr_trigger_match *match;
483 uint8_t buf[4 * sizeof(uint32_t)];
487 trigger = sr_session_trigger_get(sdi->session);
489 memset(&cfg, 0, sizeof(cfg));
491 cfg.channels = devc->cur_channels;
493 if (trigger && trigger->stages) {
494 stages = trigger->stages;
495 stage1 = stages->data;
497 sr_err("Only one trigger stage supported for now.");
500 channel = stage1->matches;
502 match = channel->data;
503 ch_mask = 1 << match->channel->index;
505 switch (match->match) {
506 case SR_TRIGGER_ZERO:
507 cfg.level |= ch_mask;
508 cfg.high_or_falling &= ~ch_mask;
511 cfg.level |= ch_mask;
512 cfg.high_or_falling |= ch_mask;
514 case SR_TRIGGER_RISING:
515 if ((cfg.enabled & ~cfg.level)) {
516 sr_err("Device only supports one edge trigger.");
519 cfg.level &= ~ch_mask;
520 cfg.high_or_falling &= ~ch_mask;
522 case SR_TRIGGER_FALLING:
523 if ((cfg.enabled & ~cfg.level)) {
524 sr_err("Device only supports one edge trigger.");
527 cfg.level &= ~ch_mask;
528 cfg.high_or_falling |= ch_mask;
531 sr_err("Unknown trigger condition.");
534 cfg.enabled |= ch_mask;
535 channel = channel->next;
538 sr_dbg("Set trigger config: "
539 "channels 0x%04x, trigger-enabled 0x%04x, "
540 "level-triggered 0x%04x, high/falling 0x%04x.",
541 cfg.channels, cfg.enabled, cfg.level, cfg.high_or_falling);
543 devc->had_triggers_configured = cfg.enabled != 0;
546 write_u32le_inc(&wrptr, cfg.channels);
547 write_u32le_inc(&wrptr, cfg.enabled);
548 write_u32le_inc(&wrptr, cfg.level);
549 write_u32le_inc(&wrptr, cfg.high_or_falling);
550 ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_TRIGGER, 16, buf, wrptr - buf);
552 sr_err("Cannot setup trigger configuration.");
559 static int set_sample_config(const struct sr_dev_inst *sdi)
561 struct dev_context *devc;
562 double clock_divisor;
566 uint8_t buf[2 * sizeof(uint32_t) + 48 / 8 + sizeof(uint16_t)];
570 total = 128 * 1024 * 1024;
572 if (devc->cur_samplerate > devc->max_samplerate) {
573 sr_err("Too high a sample rate: %" PRIu64 ".",
574 devc->cur_samplerate);
578 clock_divisor = devc->max_samplerate / (double)devc->cur_samplerate;
579 if (clock_divisor > 0xffff)
580 clock_divisor = 0xffff;
581 divisor = (uint16_t)(clock_divisor + 0.5);
582 devc->cur_samplerate = devc->max_samplerate / divisor;
584 if (devc->limit_samples > MAX_SAMPLE_DEPTH) {
585 sr_err("Too high a sample depth: %" PRIu64 ".",
586 devc->limit_samples);
590 devc->pre_trigger_size = (devc->capture_ratio * devc->limit_samples) / 100;
592 sr_dbg("Set sample config: %" PRIu64 "kHz, %" PRIu64 " samples, trigger-pos %" PRIu64 "%%.",
593 devc->cur_samplerate / 1000,
595 devc->capture_ratio);
598 write_u32le_inc(&wrptr, devc->limit_samples);
599 write_u8_inc(&wrptr, 0);
600 write_u32le_inc(&wrptr, devc->pre_trigger_size);
601 write_u32le_inc(&wrptr, ((total * devc->capture_ratio) / 100) & 0xffffff00);
602 write_u16le_inc(&wrptr, divisor);
603 write_u8_inc(&wrptr, 0);
605 ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_SAMPLING, 0, buf, wrptr - buf);
607 sr_err("Cannot setup acquisition configuration.");
615 * FPGA register REG_RUN holds the run state (u16le format). Bit fields
617 * bit 0: value 1 = idle
618 * bit 1: value 1 = writing to SDRAM
619 * bit 2: value 0 = waiting for trigger, 1 = trigger seen
620 * bit 3: value 0 = pretrigger sampling, 1 = posttrigger sampling
621 * The meaning of other bit fields is unknown.
623 * Typical values in order of appearance during execution:
624 * 0x85e2: pre-sampling, samples before the trigger position,
625 * when capture ratio > 0%
626 * 0x85ea: pre-sampling complete, now waiting for the trigger
627 * (whilst sampling continuously)
628 * 0x85ee: trigger seen, capturing post-trigger samples, running
631 static uint16_t run_state(const struct sr_dev_inst *sdi)
634 static uint16_t previous_state = 0;
637 if ((ret = ctrl_in(sdi, CMD_FPGA_SPI, REG_RUN, 0, &state, sizeof(state))) != SR_OK) {
638 sr_err("Cannot read run state.");
643 * Avoid flooding the log, only dump values as they change.
644 * The routine is called about every 50ms.
646 if (state != previous_state) {
647 previous_state = state;
648 if ((state & 0x0003) == 0x01) {
649 sr_dbg("Run state: 0x%04x (%s).", state, "idle");
650 } else if ((state & 0x000f) == 0x02) {
651 sr_dbg("Run state: 0x%04x (%s).", state,
652 "pre-trigger sampling");
653 } else if ((state & 0x000f) == 0x0a) {
654 sr_dbg("Run state: 0x%04x (%s).", state,
655 "sampling, waiting for trigger");
656 } else if ((state & 0x000f) == 0x0e) {
657 sr_dbg("Run state: 0x%04x (%s).", state,
658 "post-trigger sampling");
660 sr_dbg("Run state: 0x%04x.", state);
667 static int set_run_mode(const struct sr_dev_inst *sdi, uint8_t fast_blinking)
671 if ((ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_RUN, 0, &fast_blinking, sizeof(fast_blinking))) != SR_OK) {
672 sr_err("Cannot configure run mode %d.", fast_blinking);
679 static int get_capture_info(const struct sr_dev_inst *sdi)
681 struct dev_context *devc;
683 uint8_t buf[3 * sizeof(uint32_t)];
684 const uint8_t *rdptr;
688 if ((ret = ctrl_in(sdi, CMD_FPGA_SPI, REG_SAMPLING, 0, buf, sizeof(buf))) != SR_OK) {
689 sr_err("Cannot read capture info.");
694 devc->info.n_rep_packets = read_u32le_inc(&rdptr);
695 devc->info.n_rep_packets_before_trigger = read_u32le_inc(&rdptr);
696 devc->info.write_pos = read_u32le_inc(&rdptr);
698 sr_dbg("Capture info: n_rep_packets: 0x%08x/%d, before_trigger: 0x%08x/%d, write_pos: 0x%08x%d.",
699 devc->info.n_rep_packets, devc->info.n_rep_packets,
700 devc->info.n_rep_packets_before_trigger,
701 devc->info.n_rep_packets_before_trigger,
702 devc->info.write_pos, devc->info.write_pos);
704 if (devc->info.n_rep_packets % 5) {
705 sr_warn("Unexpected packets count %lu, not a multiple of 5.",
706 (unsigned long)devc->info.n_rep_packets);
712 SR_PRIV int la2016_upload_firmware(struct sr_context *sr_ctx,
713 libusb_device *dev, uint16_t product_id)
716 snprintf(fw_file, sizeof(fw_file) - 1, UC_FIRMWARE, product_id);
717 return ezusb_upload_firmware(sr_ctx, dev, USB_CONFIGURATION, fw_file);
720 SR_PRIV int la2016_setup_acquisition(const struct sr_dev_inst *sdi)
722 struct dev_context *devc;
728 ret = set_threshold_voltage(sdi, devc->threshold_voltage);
733 if ((ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_CAPT_MODE, 0, &cmd, sizeof(cmd))) != SR_OK) {
734 sr_err("Cannot send command to stop sampling.");
738 ret = set_trigger_config(sdi);
742 ret = set_sample_config(sdi);
749 SR_PRIV int la2016_start_acquisition(const struct sr_dev_inst *sdi)
753 ret = set_run_mode(sdi, 3);
760 static int la2016_stop_acquisition(const struct sr_dev_inst *sdi)
764 ret = set_run_mode(sdi, 0);
771 SR_PRIV int la2016_abort_acquisition(const struct sr_dev_inst *sdi)
774 struct dev_context *devc;
776 ret = la2016_stop_acquisition(sdi);
780 devc = sdi ? sdi->priv : NULL;
781 if (devc && devc->transfer)
782 libusb_cancel_transfer(devc->transfer);
787 static int la2016_has_triggered(const struct sr_dev_inst *sdi)
791 state = run_state(sdi);
793 return (state & 0x3) == 1;
796 static int la2016_start_retrieval(const struct sr_dev_inst *sdi,
797 libusb_transfer_cb_fn cb)
799 struct dev_context *devc;
800 struct sr_usb_dev_inst *usb;
802 uint8_t wrbuf[2 * sizeof(uint32_t)];
810 if ((ret = get_capture_info(sdi)) != SR_OK)
813 devc->n_transfer_packets_to_read = devc->info.n_rep_packets / NUM_PACKETS_IN_CHUNK;
814 devc->n_bytes_to_read = devc->n_transfer_packets_to_read * TRANSFER_PACKET_LENGTH;
815 devc->read_pos = devc->info.write_pos - devc->n_bytes_to_read;
816 devc->n_reps_until_trigger = devc->info.n_rep_packets_before_trigger;
818 sr_dbg("Want to read %u xfer-packets starting from pos %" PRIu32 ".",
819 devc->n_transfer_packets_to_read, devc->read_pos);
821 if ((ret = ctrl_out(sdi, CMD_BULK_RESET, 0x00, 0, NULL, 0)) != SR_OK) {
822 sr_err("Cannot reset USB bulk state.");
825 sr_dbg("Will read from 0x%08lx, 0x%08x bytes.",
826 (unsigned long)devc->read_pos, devc->n_bytes_to_read);
828 write_u32le_inc(&wrptr, devc->read_pos);
829 write_u32le_inc(&wrptr, devc->n_bytes_to_read);
830 if ((ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_BULK, 0, wrbuf, wrptr - wrbuf)) != SR_OK) {
831 sr_err("Cannot send USB bulk config.");
834 if ((ret = ctrl_out(sdi, CMD_BULK_START, 0x00, 0, NULL, 0)) != SR_OK) {
835 sr_err("Cannot unblock USB bulk transfers.");
840 * Pick a buffer size for all USB transfers. The buffer size
841 * must be a multiple of the endpoint packet size. And cannot
842 * exceed a maximum value.
844 to_read = devc->n_bytes_to_read;
845 if (to_read >= LA2016_USB_BUFSZ) /* Multiple transfers. */
846 to_read = LA2016_USB_BUFSZ;
847 else /* One transfer. */
848 to_read = (to_read + (LA2016_EP6_PKTSZ-1)) & ~(LA2016_EP6_PKTSZ-1);
849 buffer = g_try_malloc(to_read);
851 sr_dbg("USB bulk transfer size %d bytes.", (int)to_read);
852 sr_err("Cannot allocate buffer for USB bulk transfer.");
853 return SR_ERR_MALLOC;
856 devc->transfer = libusb_alloc_transfer(0);
857 libusb_fill_bulk_transfer(
858 devc->transfer, usb->devhdl,
859 0x86, buffer, to_read,
860 cb, (void *)sdi, DEFAULT_TIMEOUT_MS);
862 if ((ret = libusb_submit_transfer(devc->transfer)) != 0) {
863 sr_err("Cannot submit USB transfer: %s.", libusb_error_name(ret));
864 libusb_free_transfer(devc->transfer);
865 devc->transfer = NULL;
873 static void send_chunk(struct sr_dev_inst *sdi,
874 const uint8_t *packets, unsigned int num_tfers)
876 struct dev_context *devc;
877 struct sr_datafeed_logic logic;
878 struct sr_datafeed_packet sr_packet;
879 unsigned int max_samples, n_samples, total_samples, free_n_samples;
880 unsigned int i, j, k;
881 int do_signal_trigger;
890 logic.data = devc->convbuffer;
892 sr_packet.type = SR_DF_LOGIC;
893 sr_packet.payload = &logic;
895 max_samples = devc->convbuffer_size / 2;
897 wp = (uint16_t *)devc->convbuffer;
899 do_signal_trigger = 0;
901 if (devc->had_triggers_configured && devc->reading_behind_trigger == 0 && devc->info.n_rep_packets_before_trigger == 0) {
902 std_session_send_df_trigger(sdi);
903 devc->reading_behind_trigger = 1;
907 for (i = 0; i < num_tfers; i++) {
908 for (k = 0; k < NUM_PACKETS_IN_CHUNK; k++) {
909 free_n_samples = max_samples - n_samples;
910 if (free_n_samples < 256 || do_signal_trigger) {
911 logic.length = n_samples * 2;
912 sr_session_send(sdi, &sr_packet);
914 wp = (uint16_t *)devc->convbuffer;
915 if (do_signal_trigger) {
916 std_session_send_df_trigger(sdi);
917 do_signal_trigger = 0;
921 state = read_u16le_inc(&rp);
922 repetitions = read_u8_inc(&rp);
923 for (j = 0; j < repetitions; j++)
926 n_samples += repetitions;
927 total_samples += repetitions;
928 devc->total_samples += repetitions;
929 if (!devc->reading_behind_trigger) {
930 devc->n_reps_until_trigger--;
931 if (devc->n_reps_until_trigger == 0) {
932 devc->reading_behind_trigger = 1;
933 do_signal_trigger = 1;
934 sr_dbg("Trigger position after %" PRIu64 " samples, %.6fms.",
936 (double)devc->total_samples / devc->cur_samplerate * 1e3);
940 (void)read_u8_inc(&rp); /* Skip sequence number. */
943 logic.length = n_samples * 2;
944 sr_session_send(sdi, &sr_packet);
945 if (do_signal_trigger) {
946 std_session_send_df_trigger(sdi);
949 sr_dbg("Send_chunk done after %u samples.", total_samples);
952 static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
954 struct sr_dev_inst *sdi;
955 struct dev_context *devc;
956 struct sr_usb_dev_inst *usb;
959 sdi = transfer->user_data;
963 sr_dbg("receive_transfer(): status %s received %d bytes.",
964 libusb_error_name(transfer->status), transfer->actual_length);
966 if (transfer->status == LIBUSB_TRANSFER_TIMED_OUT) {
967 sr_err("USB bulk transfer timeout.");
968 devc->transfer_finished = 1;
970 send_chunk(sdi, transfer->buffer, transfer->actual_length / TRANSFER_PACKET_LENGTH);
972 devc->n_bytes_to_read -= transfer->actual_length;
973 if (devc->n_bytes_to_read) {
974 uint32_t to_read = devc->n_bytes_to_read;
976 * Determine read size for the next USB transfer. Make
977 * the buffer size a multiple of the endpoint packet
978 * size. Don't exceed a maximum value.
980 if (to_read >= LA2016_USB_BUFSZ)
981 to_read = LA2016_USB_BUFSZ;
983 to_read = (to_read + (LA2016_EP6_PKTSZ-1)) & ~(LA2016_EP6_PKTSZ-1);
984 libusb_fill_bulk_transfer(
985 transfer, usb->devhdl,
986 0x86, transfer->buffer, to_read,
987 receive_transfer, (void *)sdi, DEFAULT_TIMEOUT_MS);
989 if ((ret = libusb_submit_transfer(transfer)) == 0)
991 sr_err("Cannot submit another USB transfer: %s.",
992 libusb_error_name(ret));
995 g_free(transfer->buffer);
996 libusb_free_transfer(transfer);
997 devc->transfer_finished = 1;
1000 SR_PRIV int la2016_receive_data(int fd, int revents, void *cb_data)
1002 const struct sr_dev_inst *sdi;
1003 struct dev_context *devc;
1004 struct drv_context *drvc;
1012 drvc = sdi->driver->context;
1014 if (devc->have_trigger == 0) {
1015 if (la2016_has_triggered(sdi) == 0) {
1016 /* Not yet ready for sample data download. */
1019 devc->have_trigger = 1;
1020 devc->transfer_finished = 0;
1021 devc->reading_behind_trigger = 0;
1022 devc->total_samples = 0;
1023 /* We can start downloading sample data. */
1024 if (la2016_start_retrieval(sdi, receive_transfer) != SR_OK) {
1025 sr_err("Cannot start acquisition data download.");
1028 sr_dbg("Acquisition data download started.");
1029 std_session_send_df_frame_begin(sdi);
1034 tv.tv_sec = tv.tv_usec = 0;
1035 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
1037 if (devc->transfer_finished) {
1038 sr_dbg("Download finished, post processing.");
1039 std_session_send_df_frame_end(sdi);
1041 usb_source_remove(sdi->session, drvc->sr_ctx);
1042 std_session_send_df_end(sdi);
1044 la2016_stop_acquisition(sdi);
1046 g_free(devc->convbuffer);
1047 devc->convbuffer = NULL;
1049 devc->transfer = NULL;
1051 sr_dbg("Download finished, done post processing.");
1057 SR_PRIV int la2016_init_device(const struct sr_dev_inst *sdi)
1059 struct dev_context *devc;
1062 int16_t purchase_date_bcd[2];
1064 const char *bitstream_fn;
1070 * Four EEPROM bytes at offset 0x20 are purchase year and month
1071 * in BCD format, with 16bit complemented checksum. For example
1072 * 20 04 df fb translates to 2020-04. This can help identify the
1073 * age of devices when unknown magic numbers are seen.
1075 if ((ret = ctrl_in(sdi, CMD_EEPROM, 0x20, 0, purchase_date_bcd, sizeof(purchase_date_bcd))) != SR_OK) {
1076 sr_err("Cannot read purchase date in EEPROM.");
1078 sr_dbg("Purchase date: 20%02hx-%02hx.",
1079 (purchase_date_bcd[0]) & 0xff,
1080 (purchase_date_bcd[0] >> 8) & 0xff);
1081 if (purchase_date_bcd[0] != (0x0ffff & ~purchase_date_bcd[1])) {
1082 sr_err("Purchase date fails checksum test.");
1087 * Several Kingst logic analyzer devices share the same USB VID
1088 * and PID. The product ID determines which MCU firmware to load.
1089 * The MCU firmware provides access to EEPROM content which then
1090 * allows to identify the device model. Which in turn determines
1091 * which FPGA bitstream to load. Eight bytes at offset 0x08 are
1094 * EEPROM content for model identification is kept redundantly
1095 * in memory. The values are stored in verbatim and in inverted
1096 * form, multiple copies are kept at different offsets. Example
1107 * Exclusively inspecting the magic byte appears to be sufficient,
1108 * other fields seem to be 'don't care'.
1110 * magic 2 == LA2016 using "kingst-la2016-fpga.bitstream"
1111 * magic 3 == LA1016 using "kingst-la1016-fpga.bitstream"
1112 * magic 8 == LA2016a using "kingst-la2016a1-fpga.bitstream"
1113 * (latest v1.3.0 PCB, perhaps others)
1114 * magic 9 == LA1016a using "kingst-la1016a1-fpga.bitstream"
1115 * (latest v1.3.0 PCB, perhaps others)
1117 * When EEPROM content does not match the hardware configuration
1118 * (the board layout), the software may load but yield incorrect
1119 * results (like swapped channels). The FPGA bitstream itself
1120 * will authenticate with IC U10 and fail when its capabilities
1121 * do not match the hardware model. An LA1016 won't become a
1122 * LA2016 by faking its EEPROM content.
1124 if ((ret = ctrl_in(sdi, CMD_EEPROM, 0x08, 0, &buf, sizeof(buf))) != SR_OK) {
1125 sr_err("Cannot read EEPROM device identifier bytes.");
1130 if (buf[0] == (0xff & ~buf[1])) {
1131 /* Primary copy of magic passes complement check. */
1133 } else if (buf[4] == (0xff & ~buf[5])) {
1134 /* Backup copy of magic passes complement check. */
1135 sr_dbg("Using backup copy of device type magic number.");
1139 sr_dbg("Device type: magic number is %hhu.", magic);
1141 /* Select the FPGA bitstream depending on the model. */
1144 bitstream_fn = FPGA_FW_LA2016;
1145 devc->max_samplerate = MAX_SAMPLE_RATE_LA2016;
1148 bitstream_fn = FPGA_FW_LA1016;
1149 devc->max_samplerate = MAX_SAMPLE_RATE_LA1016;
1152 bitstream_fn = FPGA_FW_LA2016A;
1153 devc->max_samplerate = MAX_SAMPLE_RATE_LA2016;
1156 bitstream_fn = FPGA_FW_LA1016A;
1157 devc->max_samplerate = MAX_SAMPLE_RATE_LA1016;
1160 bitstream_fn = NULL;
1163 if (!bitstream_fn || !*bitstream_fn) {
1164 sr_err("Cannot identify as one of the supported models.");
1168 if (check_fpga_bitstream(sdi) != SR_OK) {
1169 ret = upload_fpga_bitstream(sdi, bitstream_fn);
1171 sr_err("Cannot upload FPGA bitstream.");
1175 ret = enable_fpga_bitstream(sdi);
1177 sr_err("Cannot enable FPGA bitstream after upload.");
1181 state = run_state(sdi);
1182 if (state != 0x85e9) {
1183 sr_warn("Unexpected run state, want 0x85e9, got 0x%04x.", state);
1186 if ((ret = ctrl_out(sdi, CMD_BULK_RESET, 0x00, 0, NULL, 0)) != SR_OK) {
1187 sr_err("Cannot reset USB bulk transfer.");
1191 sr_dbg("Device should be initialized.");
1193 return set_defaults(sdi);
1196 SR_PRIV int la2016_deinit_device(const struct sr_dev_inst *sdi)
1200 if ((ret = ctrl_out(sdi, CMD_FPGA_ENABLE, 0x00, 0, NULL, 0)) != SR_OK) {
1201 sr_err("Cannot deinitialize device's FPGA.");