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));
87 static int transact(const struct sr_dev_inst *sdi,
88 const uint8_t *req, uint8_t req_len,
89 uint8_t *rsp, uint8_t rsp_len)
91 struct sr_usb_dev_inst *usb = sdi->conn;
93 uint8_t rsp_dummy[1] = {};
96 if (req_len < 2 || req_len > 64 || rsp_len > 128 ||
97 !req || (rsp_len > 0 && !rsp))
100 req_enc = g_malloc(req_len);
101 encrypt(sdi, req, req_enc, req_len);
103 ret = libusb_bulk_transfer(usb->devhdl, 1, req_enc, req_len, &xfer, 1000);
105 sr_dbg("Failed to send request 0x%02x: %s.",
106 req[1], libusb_error_name(ret));
109 if (xfer != req_len) {
110 sr_dbg("Failed to send request 0x%02x: incorrect length "
111 "%d != %d.", req[1], xfer, req_len);
115 if (req[0] == 0x20) { /* Reseed. */
117 } else if (rsp_len == 0) {
119 rsp_len = sizeof(rsp_dummy);
122 ret = libusb_bulk_transfer(usb->devhdl, 0x80 | 1, rsp, rsp_len,
125 sr_dbg("Failed to receive response to request 0x%02x: %s.",
126 req[1], libusb_error_name(ret));
129 if (xfer != rsp_len) {
130 sr_dbg("Failed to receive response to request 0x%02x: "
131 "incorrect length %d != %d.", req[1], xfer, rsp_len);
135 decrypt(sdi, rsp, rsp_len);
140 static int reseed(const struct sr_dev_inst *sdi)
142 struct dev_context *devc = sdi->priv;
143 uint8_t req[] = {0x20, 0x24, 0x4b, 0x35, 0x8e};
146 return transact(sdi, req, sizeof(req), NULL, 0);
149 static int write_regs(const struct sr_dev_inst *sdi, uint8_t (*regs)[2], uint8_t cnt)
154 if (cnt < 1 || cnt > 30)
158 req[1] = COMMAND_WRITE_REG;
161 for (i = 0; i < cnt; i++) {
162 req[3 + 2 * i] = regs[i][0];
163 req[4 + 2 * i] = regs[i][1];
166 return transact(sdi, req, 3 + (2 * cnt), NULL, 0);
169 static int write_reg(const struct sr_dev_inst *sdi,
170 uint8_t address, uint8_t value)
172 uint8_t regs[2] = {address, value};
174 return write_regs(sdi, ®s, 1);
177 static int get_firmware_version(const struct sr_dev_inst *sdi)
179 uint8_t req[2] = {0x00, COMMAND_READ_FW_VER};
180 uint8_t rsp[128] = {};
183 ret = transact(sdi, req, sizeof(req), rsp, sizeof(rsp));
186 sr_dbg("fw-version: %s", rsp);
192 static int read_i2c(const struct sr_dev_inst *sdi, uint8_t *data, uint8_t len)
195 uint8_t rsp[1 + 128];
198 if (len < 1 || len > 128 || !data)
202 req[1] = COMMAND_READ_I2C;
203 req[2] = 0xc0; /* Fixed address */
205 req[4] = 0; /* Len MSB? */
207 ret = transact(sdi, req, sizeof(req), rsp, 1 + len);
210 if (rsp[0] != 0x02) {
211 sr_dbg("Failed to do I2C read (0x%02x).", rsp[0]);
215 memcpy(data, rsp + 1, len);
219 static int write_i2c(const struct sr_dev_inst *sdi, const uint8_t *data, uint8_t len)
221 uint8_t req[5 + 128];
225 if (len < 1 || len > 128 || !data)
229 req[1] = COMMAND_WRITE_I2C;
230 req[2] = 0xc0; /* Fixed address */
232 req[4] = 0; /* Len MSB? */
233 memcpy(req + 5, data, len);
235 ret = transact(sdi, req, 5 + len, rsp, sizeof(rsp));
238 if (rsp[0] != 0x02) {
239 sr_dbg("Failed to do I2C write (0x%02x).", rsp[0]);
246 static int wake_i2c(const struct sr_dev_inst *sdi)
248 uint8_t req[] = {0x00, COMMAND_WAKE_I2C};
250 uint8_t i2c_rsp[1 + 1 + 2] = {};
253 ret = transact(sdi, req, sizeof(req), rsp, sizeof(rsp));
256 if (rsp[0] != 0x00) {
257 sr_dbg("Failed to do I2C wake trigger (0x%02x).", rsp[0]);
261 ret = read_i2c(sdi, i2c_rsp, sizeof(i2c_rsp));
265 if (i2c_rsp[1] != 0x11) {
266 sr_dbg("Failed to do I2C wake read (0x%02x).", i2c_rsp[0]);
273 static int crypto_random(const struct sr_dev_inst *sdi, uint8_t *data)
275 uint8_t i2c_req[8] = {0x03, 0x07, 0x1b, 0x00, 0x00, 0x00, 0x24, 0xcd};
276 uint8_t i2c_rsp[1 + 32 + 2] = {};
279 ret = write_i2c(sdi, i2c_req, sizeof(i2c_req));
283 g_usleep(100000); /* TODO: Poll instead. */
285 ret = read_i2c(sdi, i2c_rsp, sizeof(i2c_rsp));
290 memcpy(data, i2c_rsp + 1, 32);
295 static int crypto_nonce(const struct sr_dev_inst *sdi, uint8_t *data)
297 uint8_t i2c_req[6 + 20 + 2] = {0x03, 0x1b, 0x16, 0x00, 0x00, 0x00};
298 uint8_t i2c_rsp[1 + 32 + 2] = {};
305 ret = write_i2c(sdi, i2c_req, sizeof(i2c_req));
309 g_usleep(100000); /* TODO: Poll instead. */
311 ret = read_i2c(sdi, i2c_rsp, sizeof(i2c_rsp));
316 memcpy(data, i2c_rsp + 1, 32);
321 static int crypto_sign(const struct sr_dev_inst *sdi, uint8_t *data, uint8_t *crc)
323 uint8_t i2c_req[8] = {0x03, 0x07, 0x41, 0x80, 0x00, 0x00, 0x28, 0x05};
324 uint8_t i2c_rsp[1 + 64 + 2] = {};
327 ret = write_i2c(sdi, i2c_req, sizeof(i2c_req));
331 g_usleep(100000); /* TODO: Poll instead. */
333 ret = read_i2c(sdi, i2c_rsp, sizeof(i2c_rsp));
337 memcpy(data, i2c_rsp + 1, 64);
338 memcpy(crc, i2c_rsp + 1 + 64, 2);
343 static int authenticate(const struct sr_dev_inst *sdi)
345 struct dev_context *devc = sdi->priv;
346 uint8_t random[32] = {};
347 uint8_t nonce[32] = {};
348 uint8_t sig[64] = {};
349 uint8_t sig_crc[64] = {};
357 ret = crypto_random(sdi, random);
360 sr_dbg("random: 0x%02x 0x%02x 0x%02x 0x%02x", random[0], random[1], random[2], random[3]);
362 ret = crypto_nonce(sdi, nonce);
365 sr_dbg("nonce: 0x%02x 0x%02x 0x%02x 0x%02x", nonce[0], nonce[1], nonce[2], nonce[3]);
367 ret = crypto_nonce(sdi, nonce);
370 sr_dbg("nonce: 0x%02x 0x%02x 0x%02x 0x%02x", nonce[0], nonce[1], nonce[2], nonce[3]);
372 ret = crypto_sign(sdi, sig, sig_crc);
375 sr_dbg("sig: 0x%02x 0x%02x 0x%02x 0x%02x", sig[0], sig[1], sig[2], sig[3]);
376 sr_dbg("sig crc: 0x%02x 0x%02x", sig_crc[0], sig_crc[1]);
379 for (i = 0; i < 28; i++)
380 lfsr ^= nonce[i] << (8 * (i % 4));
381 lfsr ^= sig_crc[0] | sig_crc[1] << 8;
383 sr_dbg("Authenticate 0x%08x -> 0x%08x", devc->lfsr, lfsr);
390 static int set_led(const struct sr_dev_inst *sdi, uint8_t r, uint8_t g, uint8_t b)
392 uint8_t regs[][2] = {
400 return write_regs(sdi, regs, G_N_ELEMENTS(regs));
404 static int configure_channels(const struct sr_dev_inst *sdi)
406 struct dev_context *devc = sdi->priv;
407 const struct sr_channel *c;
411 devc->dig_channel_cnt = 0;
412 devc->dig_channel_mask = 0;
413 for (l = sdi->channels; l; l = l->next) {
418 mask = 1 << c->index;
419 devc->dig_channel_masks[devc->dig_channel_cnt++] = mask;
420 devc->dig_channel_mask |= mask;
423 sr_dbg("%d channels enabled (0x%04x)",
424 devc->dig_channel_cnt, devc->dig_channel_mask);
429 SR_PRIV int saleae_logic_pro_init(const struct sr_dev_inst *sdi)
432 get_firmware_version(sdi);
433 /* Setting the LED doesn't work yet. */
434 /* set_led(sdi, 0x00, 0x00, 0xff); */
439 SR_PRIV int saleae_logic_pro_prepare(const struct sr_dev_inst *sdi)
441 struct dev_context *devc = sdi->priv;
442 uint8_t regs_unknown[][2] = {
447 uint8_t regs_config[][2] = {
449 {0x08, 0x00}, /* Analog channel mask (LSB) */
450 {0x09, 0x00}, /* Analog channel mask (MSB) */
451 {0x06, 0x01}, /* Digital channel mask (LSB) */
452 {0x07, 0x00}, /* Digital channel mask (MSB) */
453 {0x0a, 0x00}, /* Analog sample rate? */
454 {0x0b, 0x64}, /* Digital sample rate? */
456 {0x0d, 0x00}, /* Analog mux rate? */
457 {0x0e, 0x01}, /* Digital mux rate? */
460 {0x14, 0xff}, /* Pre-divider? */
462 uint8_t start_req[] = {0x00, 0x01};
463 uint8_t start_rsp[2] = {};
465 configure_channels(sdi);
467 /* Digital channel mask and muxing */
468 regs_config[3][1] = devc->dig_channel_mask;
469 regs_config[4][1] = devc->dig_channel_mask >> 8;
470 regs_config[9][1] = devc->dig_channel_cnt;
473 switch (devc->dig_samplerate) {
475 regs_config[6][1] = 0x64;
478 regs_config[6][1] = 0x32;
481 regs_config[6][1] = 0x28;
484 regs_config[6][1] = 0x0a;
487 regs_config[6][1] = 0x04;
488 regs_config[12][1] = 0x80;
491 regs_config[6][1] = 0x02;
492 regs_config[12][1] = 0x40;
500 write_reg(sdi, 0x15, 0x03);
501 write_regs(sdi, regs_unknown, G_N_ELEMENTS(regs_unknown));
502 write_regs(sdi, regs_config, G_N_ELEMENTS(regs_config));
504 transact(sdi, start_req, sizeof(start_req), start_rsp, sizeof(start_rsp));
509 SR_PRIV int saleae_logic_pro_start(const struct sr_dev_inst *sdi)
511 struct dev_context *devc = sdi->priv;
514 devc->batch_index = 0;
516 write_reg(sdi, 0x00, 0x01);
521 SR_PRIV int saleae_logic_pro_stop(const struct sr_dev_inst *sdi)
523 uint8_t stop_req[] = {0x00, 0x02};
524 uint8_t stop_rsp[2] = {};
526 write_reg(sdi, 0x00, 0x00);
527 transact(sdi, stop_req, sizeof(stop_req), stop_rsp, sizeof(stop_rsp));
532 static void saleae_logic_pro_send_data(const struct sr_dev_inst *sdi,
533 void *data, size_t length, size_t unitsize)
535 const struct sr_datafeed_logic logic = {
537 .unitsize = unitsize,
541 const struct sr_datafeed_packet packet = {
546 sr_session_send(sdi, &packet);
550 * One batch from the device consists of 32 samples per active digital channel.
551 * This stream of batches is packed into USB packets with 16384 bytes each.
553 static void saleae_logic_pro_convert_data(const struct sr_dev_inst *sdi,
554 const uint32_t *src, size_t srccnt)
556 struct dev_context *devc = sdi->priv;
557 uint8_t *dst = devc->conv_buffer;
559 uint16_t channel_mask;
560 unsigned int sample_index, batch_index;
563 /* Copy partial batch to the beginning. */
564 memcpy(dst, dst + devc->conv_size, CONV_BATCH_SIZE);
565 /* Reset converted size. */
568 batch_index = devc->batch_index;
571 dst_batch = (uint16_t*)dst;
573 /* First index of the batch. */
574 if (batch_index == 0)
575 memset(dst, 0, CONV_BATCH_SIZE);
577 /* Convert one channel. */
578 channel_mask = devc->dig_channel_masks[batch_index];
579 for (sample_index = 0; sample_index <= 31; sample_index++)
580 if ((samples >> (31 - sample_index)) & 1)
581 dst_batch[sample_index] |= channel_mask;
583 /* Last index of the batch. */
584 if (++batch_index == devc->dig_channel_cnt) {
585 devc->conv_size += CONV_BATCH_SIZE;
587 dst += CONV_BATCH_SIZE;
590 devc->batch_index = batch_index;
593 SR_PRIV void LIBUSB_CALL saleae_logic_pro_receive_data(struct libusb_transfer *transfer)
595 const struct sr_dev_inst *sdi = transfer->user_data;
596 struct dev_context *devc = sdi->priv;
599 switch (transfer->status) {
600 case LIBUSB_TRANSFER_NO_DEVICE:
601 sr_dbg("FIXME no device");
603 case LIBUSB_TRANSFER_COMPLETED:
604 case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though. */
611 saleae_logic_pro_convert_data(sdi, (uint32_t*)transfer->buffer, 16 * 1024 / 4);
612 saleae_logic_pro_send_data(sdi, devc->conv_buffer, devc->conv_size, 2);
614 if ((ret = libusb_submit_transfer(transfer)) != LIBUSB_SUCCESS)
615 sr_dbg("FIXME resubmit failed");