2 * This file is part of the libsigrok project.
4 * Copyright (C) 2017 Jan Luebbe <jluebbe@lasnet.de>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #define COMMAND_START_CAPTURE 0x01
25 #define COMMAND_STOP_CAPTURE 0x02
26 #define COMMAND_READ_EEPROM 0x07
27 #define COMMAND_WRITE_REG 0x80
28 #define COMMAND_READ_REG 0x81
29 #define COMMAND_WRITE_I2C 0x87
30 #define COMMAND_READ_I2C 0x88
31 #define COMMAND_WAKE_I2C 0x89
32 #define COMMAND_READ_FW_VER 0x8b
34 #define REG_LED_RED 0x0f
35 #define REG_LED_GREEN 0x10
36 #define REG_LED_BLUE 0x11
38 static void iterate_lfsr(const struct sr_dev_inst *sdi)
40 struct dev_context *devc = sdi->priv;
41 uint32_t lfsr = devc->lfsr;
44 max = (lfsr & 0x1f) + 34;
45 for (i = 0; i <= max; i++) {
46 lfsr = (lfsr >> 1) | \
53 sr_dbg("Iterate 0x%08x -> 0x%08x", devc->lfsr, lfsr);
57 static void encrypt(const struct sr_dev_inst *sdi, const uint8_t *in, uint8_t *out, uint8_t len)
59 struct dev_context *devc = sdi->priv;
60 uint32_t lfsr = devc->lfsr;
64 for (i = 0; i < len; i++) {
66 mask = lfsr >> (i%4*8);
68 value = (value & 0x28) | ((value ^ mask) & ~0x28);
76 static void decrypt(const struct sr_dev_inst *sdi, uint8_t *data, uint8_t len)
78 struct dev_context *devc = sdi->priv;
79 uint32_t lfsr = devc->lfsr;
82 for (i = 0; i < len; i++) {
83 data[i] ^= (lfsr >> (i%4*8));
88 static int transact(const struct sr_dev_inst *sdi,
89 const uint8_t *req, uint8_t req_len,
90 uint8_t *rsp, uint8_t rsp_len)
92 struct sr_usb_dev_inst *usb = sdi->conn;
94 uint8_t rsp_dummy[1] = {};
97 if (req_len < 2 || req_len > 64 || rsp_len > 128 ||
98 !req || (rsp_len > 0 && !rsp))
101 req_enc = g_malloc(req_len);
102 encrypt(sdi, req, req_enc, req_len);
104 ret = libusb_bulk_transfer(usb->devhdl, 1, req_enc, req_len, &xfer, 1000);
106 sr_dbg("Failed to send request 0x%02x: %s.",
107 req[1], libusb_error_name(ret));
110 if (xfer != req_len) {
111 sr_dbg("Failed to send request 0x%02x: incorrect length "
112 "%d != %d.", req[1], xfer, req_len);
116 if (req[0] == 0x20) { // reseed
118 } else if (rsp_len == 0) {
120 rsp_len = sizeof(rsp_dummy);
123 ret = libusb_bulk_transfer(usb->devhdl, 0x80 | 1, rsp, rsp_len,
126 sr_dbg("Failed to receive response to request 0x%02x: %s.",
127 req[1], libusb_error_name(ret));
130 if (xfer != rsp_len) {
131 sr_dbg("Failed to receive response to request 0x%02x: "
132 "incorrect length %d != %d.", req[1], xfer, rsp_len);
136 decrypt(sdi, rsp, rsp_len);
141 static int reseed(const struct sr_dev_inst *sdi)
143 struct dev_context *devc = sdi->priv;
144 uint8_t req[] = {0x20, 0x24, 0x4b, 0x35, 0x8e};
147 return transact(sdi, req, sizeof(req), NULL, 0);
150 static int write_regs(const struct sr_dev_inst *sdi, uint8_t (*regs)[2], uint8_t cnt)
155 if (cnt < 1 || cnt > 30)
159 req[1] = COMMAND_WRITE_REG;
162 for (i = 0; i < cnt; i++) {
163 req[3 + 2 * i] = regs[i][0];
164 req[4 + 2 * i] = regs[i][1];
167 return transact(sdi, req, 3 + 2*cnt, NULL, 0);
170 static int write_reg(const struct sr_dev_inst *sdi,
171 uint8_t address, uint8_t value)
173 uint8_t regs[2] = {address, value};
175 return write_regs(sdi, ®s, 1);
178 static int get_firmware_version(const struct sr_dev_inst *sdi)
180 uint8_t req[2] = {0x00, COMMAND_READ_FW_VER};
181 uint8_t rsp[128] = {};
184 ret = transact(sdi, req, sizeof(req), rsp, sizeof(rsp));
187 sr_dbg("fw-version: %s", rsp);
193 static int read_i2c(const struct sr_dev_inst *sdi, uint8_t *data, uint8_t len)
199 if (len < 1 || len > 128 || !data)
203 req[1] = COMMAND_READ_I2C;
204 req[2] = 0xc0; // fixed address
206 req[4] = 0; // len msb?
208 ret = transact(sdi, req, sizeof(req), rsp, 1 + len);
212 if (rsp[0] != 0x02) {
213 sr_dbg("Failed to do I2C read (0x%02x).", rsp[0]);
217 memcpy(data, rsp+1, len);
221 static int write_i2c(const struct sr_dev_inst *sdi, const uint8_t *data, uint8_t len)
223 uint8_t req[5 + 128];
227 if (len < 1 || len > 128 || !data)
231 req[1] = COMMAND_WRITE_I2C;
232 req[2] = 0xc0; // fixed address
234 req[4] = 0; // len msb?
235 memcpy(req + 5, data, len);
237 ret = transact(sdi, req, 5 + len, rsp, sizeof(rsp));
241 if (rsp[0] != 0x02) {
242 sr_dbg("Failed to do I2C write (0x%02x).", rsp[0]);
249 static int wake_i2c(const struct sr_dev_inst *sdi)
251 uint8_t req[] = {0x00, COMMAND_WAKE_I2C};
253 uint8_t i2c_rsp[1+1+2] = {};
256 ret = transact(sdi, req, sizeof(req), rsp, sizeof(rsp));
260 if (rsp[0] != 0x00) {
261 sr_dbg("Failed to do I2C wake trigger (0x%02x).", rsp[0]);
265 ret = read_i2c(sdi, i2c_rsp, sizeof(i2c_rsp));
269 if (i2c_rsp[1] != 0x11) {
270 sr_dbg("Failed to do I2C wake read (0x%02x).", i2c_rsp[0]);
277 static int crypto_random(const struct sr_dev_inst *sdi, uint8_t *data)
279 uint8_t i2c_req[8] = {0x03, 0x07, 0x1b, 0x00, 0x00, 0x00, 0x24, 0xcd};
280 uint8_t i2c_rsp[1+32+2] = {};
283 ret = write_i2c(sdi, i2c_req, sizeof(i2c_req));
288 g_usleep(100000); // TODO: poll instead
290 ret = read_i2c(sdi, i2c_rsp, sizeof(i2c_rsp));
296 memcpy(data, i2c_rsp+1, 32);
302 static int crypto_nonce(const struct sr_dev_inst *sdi, uint8_t *data)
304 uint8_t i2c_req[6+20+2] = {0x03, 0x1b, 0x16, 0x00, 0x00, 0x00};
305 uint8_t i2c_rsp[1+32+2] = {};
312 ret = write_i2c(sdi, i2c_req, sizeof(i2c_req));
317 g_usleep(100000); // TODO: poll instead
319 ret = read_i2c(sdi, i2c_rsp, sizeof(i2c_rsp));
325 memcpy(data, i2c_rsp+1, 32);
331 static int crypto_sign(const struct sr_dev_inst *sdi, uint8_t *data, uint8_t *crc)
333 uint8_t i2c_req[8] = {0x03, 0x07, 0x41, 0x80, 0x00, 0x00, 0x28, 0x05};
334 uint8_t i2c_rsp[1+64+2] = {};
337 ret = write_i2c(sdi, i2c_req, sizeof(i2c_req));
342 g_usleep(100000); // TODO: poll instead
344 ret = read_i2c(sdi, i2c_rsp, sizeof(i2c_rsp));
349 memcpy(data, i2c_rsp+1, 64);
350 memcpy(crc, i2c_rsp+1+64, 2);
355 static int authenticate(const struct sr_dev_inst *sdi)
357 struct dev_context *devc = sdi->priv;
358 uint8_t random[32] = {};
359 uint8_t nonce[32] = {};
360 uint8_t sig[64] = {};
361 uint8_t sig_crc[64] = {};
369 ret = crypto_random(sdi, random);
372 sr_dbg("random: 0x%02x 0x%02x 0x%02x 0x%02x", random[0], random[1], random[2], random[3]);
374 ret = crypto_nonce(sdi, nonce);
377 sr_dbg("nonce: 0x%02x 0x%02x 0x%02x 0x%02x", nonce[0], nonce[1], nonce[2], nonce[3]);
379 ret = crypto_nonce(sdi, nonce);
382 sr_dbg("nonce: 0x%02x 0x%02x 0x%02x 0x%02x", nonce[0], nonce[1], nonce[2], nonce[3]);
384 ret = crypto_sign(sdi, sig, sig_crc);
387 sr_dbg("sig: 0x%02x 0x%02x 0x%02x 0x%02x", sig[0], sig[1], sig[2], sig[3]);
388 sr_dbg("sig crc: 0x%02x 0x%02x", sig_crc[0], sig_crc[1]);
391 for (i = 0; i < 28; i++)
392 lfsr ^= nonce[i] << (8*(i%4));
393 lfsr ^= sig_crc[0] | sig_crc[1] << 8;
395 sr_dbg("Authenticate 0x%08x -> 0x%08x", devc->lfsr, lfsr);
401 static int set_led(const struct sr_dev_inst *sdi, uint8_t r, uint8_t g, uint8_t b)
403 uint8_t regs[][2] = {
411 return write_regs(sdi, regs, G_N_ELEMENTS(regs));
414 static int configure_channels(const struct sr_dev_inst *sdi)
416 struct dev_context *devc = sdi->priv;
417 const struct sr_channel *c;
421 devc->dig_channel_cnt = 0;
422 devc->dig_channel_mask = 0;
423 for (l = sdi->channels; l; l = l->next) {
428 mask = 1 << c->index;
429 devc->dig_channel_masks[devc->dig_channel_cnt++] = mask;
430 devc->dig_channel_mask |= mask;
433 sr_dbg("%d channels enabled (0x%04x)",
434 devc->dig_channel_cnt,
435 devc->dig_channel_mask);
440 SR_PRIV int saleae_logicpro_init(const struct sr_dev_inst *sdi)
443 get_firmware_version(sdi);
444 /* setting the LED doesn't work yet */
445 /* set_led(sdi, 0x00, 0x00, 0xff); */
450 SR_PRIV int saleae_logicpro_prepare(const struct sr_dev_inst *sdi)
452 struct dev_context *devc = sdi->priv;
453 uint8_t regs_unknown[][2] = {
458 uint8_t regs_config[][2] = {
460 {0x08, 0x00}, /* analog channel mask (LSB) */
461 {0x09, 0x00}, /* analog channel mask (MSB) */
462 {0x06, 0x01}, /* digital channel mask (LSB) */
463 {0x07, 0x00}, /* digital channel mask (MSB) */
464 {0x0a, 0x00}, /* analog sample rate? */
465 {0x0b, 0x64}, /* digital sample rate? */
467 {0x0d, 0x00}, /* analog mux rate? */
468 {0x0e, 0x01}, /* digital mux rate? */
471 {0x14, 0xff}, /* pre-divider? */
473 uint8_t start_req[] = {0x00, 0x01};
474 uint8_t start_rsp[2] = {};
476 configure_channels(sdi);
478 /* digital channel mask and muxing */
479 regs_config[3][1] = devc->dig_channel_mask;
480 regs_config[4][1] = devc->dig_channel_mask >> 8;
481 regs_config[9][1] = devc->dig_channel_cnt;
484 switch (devc->dig_samplerate) {
486 regs_config[6][1] = 0x64;
489 regs_config[6][1] = 0x32;
492 regs_config[6][1] = 0x28;
495 regs_config[6][1] = 0x0a;
498 regs_config[6][1] = 0x04;
499 regs_config[12][1] = 0x80;
502 regs_config[6][1] = 0x02;
503 regs_config[12][1] = 0x40;
511 write_reg(sdi, 0x15, 0x03);
512 write_regs(sdi, regs_unknown, G_N_ELEMENTS(regs_unknown));
513 write_regs(sdi, regs_config, G_N_ELEMENTS(regs_config));
515 transact(sdi, start_req, sizeof(start_req), start_rsp, sizeof(start_rsp));
520 SR_PRIV int saleae_logicpro_start(const struct sr_dev_inst *sdi)
522 struct dev_context *devc = sdi->priv;
525 devc->batch_index = 0;
527 write_reg(sdi, 0x00, 0x01);
532 SR_PRIV int saleae_logicpro_stop(const struct sr_dev_inst *sdi)
534 uint8_t stop_req[] = {0x00, 0x02};
535 uint8_t stop_rsp[2] = {};
537 write_reg(sdi, 0x00, 0x00);
538 transact(sdi, stop_req, sizeof(stop_req), stop_rsp, sizeof(stop_rsp));
543 static void saleae_logicpro_send_data(const struct sr_dev_inst *sdi,
544 void *data, size_t length, size_t unitsize)
546 const struct sr_datafeed_logic logic = {
548 .unitsize = unitsize,
552 const struct sr_datafeed_packet packet = {
557 sr_session_send(sdi, &packet);
561 * One batch from the device consists of 32 samples per active digital channel.
562 * This stream of batches is packed into USB packets with 16384 bytes each.
564 static void saleae_logicpro_convert_data(const struct sr_dev_inst *sdi,
565 const uint32_t *src, size_t srccnt)
567 struct dev_context *devc = sdi->priv;
568 uint8_t *dst = devc->conv_buffer;
570 uint16_t channel_mask;
571 unsigned int sample_index, batch_index;
574 /* copy partial batch to the beginning */
575 memcpy(dst, dst+devc->conv_size, CONV_BATCH_SIZE);
576 /* reset converted size */
579 batch_index = devc->batch_index;
582 dst_batch = (uint16_t*)dst;
584 /* first index of the batch */
585 if (batch_index == 0)
586 memset(dst, 0, CONV_BATCH_SIZE);
588 /* convert one channel */
589 channel_mask = devc->dig_channel_masks[batch_index];
590 for (sample_index = 0; sample_index <= 31; sample_index++)
591 if ((samples >> (31-sample_index)) & 1)
592 dst_batch[sample_index] |= channel_mask;
594 /* last index of the batch */
595 if (++batch_index == devc->dig_channel_cnt) {
596 devc->conv_size += CONV_BATCH_SIZE;
598 dst += CONV_BATCH_SIZE;
601 devc->batch_index = batch_index;
604 SR_PRIV void LIBUSB_CALL saleae_logicpro_receive_data(struct libusb_transfer *transfer)
606 const struct sr_dev_inst *sdi = transfer->user_data;
607 struct dev_context *devc = sdi->priv;
610 switch (transfer->status) {
611 case LIBUSB_TRANSFER_NO_DEVICE:
612 sr_dbg("FIXME no device");
614 case LIBUSB_TRANSFER_COMPLETED:
615 case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though. */
622 saleae_logicpro_convert_data(sdi, (uint32_t*)transfer->buffer, 16*1024/4);
623 saleae_logicpro_send_data(sdi, devc->conv_buffer, devc->conv_size, 2);
625 if ((ret = libusb_submit_transfer(transfer)) != LIBUSB_SUCCESS)
626 sr_dbg("FIXME resubmit failed");