2 * This file is part of the sigrok project.
4 * Copyright (C) 2011-2012 Uwe Hermann <uwe@hermann-uwe.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 2 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, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libsigrok.h"
25 #include "libsigrok-internal.h"
28 SR_PRIV struct sr_dev_driver chronovu_la8_driver_info;
29 static struct sr_dev_driver *cdi = &chronovu_la8_driver_info;
32 * The ChronoVu LA8 can have multiple PIDs. Older versions shipped with
33 * a standard FTDI USB VID/PID of 0403:6001, newer ones have 0403:8867.
35 static const uint16_t usb_pids[] = {
40 /* Function prototypes. */
41 static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
44 static void clear_instances(void)
47 struct sr_dev_inst *sdi;
50 /* Properly close all devices. */
51 for (l = cdi->instances; l; l = l->next) {
52 if (!(sdi = l->data)) {
53 /* Log error, but continue cleaning up the rest. */
54 sr_err("la8: %s: sdi was NULL, continuing", __func__);
59 ftdi_free(ctx->ftdic);
62 sr_dev_inst_free(sdi);
64 g_slist_free(cdi->instances);
65 cdi->instances = NULL;
69 static int hw_init(void)
77 static GSList *hw_scan(GSList *options)
79 struct sr_dev_inst *sdi;
88 /* Allocate memory for our private driver context. */
89 if (!(ctx = g_try_malloc(sizeof(struct context)))) {
90 sr_err("la8: %s: struct context malloc failed", __func__);
91 goto err_free_nothing;
94 /* Set some sane defaults. */
96 ctx->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */
98 ctx->limit_samples = 0;
99 ctx->session_dev_id = NULL;
100 memset(ctx->mangled_buf, 0, BS);
101 ctx->final_buf = NULL;
102 ctx->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */
103 ctx->trigger_mask = 0x00; /* All probes are "don't care". */
104 ctx->trigger_timeout = 10; /* Default to 10s trigger timeout. */
105 ctx->trigger_found = 0;
107 ctx->block_counter = 0;
108 ctx->divcount = 0; /* 10ns sample period == 100MHz samplerate */
111 /* Allocate memory where we'll store the de-mangled data. */
112 if (!(ctx->final_buf = g_try_malloc(SDRAM_SIZE))) {
113 sr_err("la8: %s: final_buf malloc failed", __func__);
117 /* Allocate memory for the FTDI context (ftdic) and initialize it. */
118 if (!(ctx->ftdic = ftdi_new())) {
119 sr_err("la8: %s: ftdi_new failed", __func__);
120 goto err_free_final_buf;
123 /* Check for the device and temporarily open it. */
124 for (i = 0; i < ARRAY_SIZE(usb_pids); i++) {
125 sr_dbg("la8: Probing for VID/PID %04x:%04x.", USB_VENDOR_ID,
127 ret = ftdi_usb_open_desc(ctx->ftdic, USB_VENDOR_ID,
128 usb_pids[i], USB_DESCRIPTION, NULL);
130 sr_dbg("la8: Found LA8 device (%04x:%04x).",
131 USB_VENDOR_ID, usb_pids[i]);
132 ctx->usb_pid = usb_pids[i];
136 if (ctx->usb_pid == 0)
139 /* Register the device with libsigrok. */
140 sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING,
141 USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
143 sr_err("la8: %s: sr_dev_inst_new failed", __func__);
144 goto err_close_ftdic;
149 devices = g_slist_append(devices, sdi);
150 cdi->instances = g_slist_append(cdi->instances, sdi);
152 sr_spew("la8: Device init successful.");
154 /* Close device. We'll reopen it again when we need it. */
155 (void) la8_close(ctx); /* Log, but ignore errors. */
160 (void) la8_close(ctx); /* Log, but ignore errors. */
162 free(ctx->ftdic); /* NOT g_free()! */
164 g_free(ctx->final_buf);
172 static int hw_dev_open(struct sr_dev_inst *sdi)
177 if (!(ctx = sdi->priv)) {
178 sr_err("la8: %s: sdi->priv was NULL", __func__);
182 sr_dbg("la8: Opening LA8 device (%04x:%04x).", USB_VENDOR_ID,
185 /* Open the device. */
186 if ((ret = ftdi_usb_open_desc(ctx->ftdic, USB_VENDOR_ID,
187 ctx->usb_pid, USB_DESCRIPTION, NULL)) < 0) {
188 sr_err("la8: %s: ftdi_usb_open_desc: (%d) %s",
189 __func__, ret, ftdi_get_error_string(ctx->ftdic));
190 (void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
193 sr_dbg("la8: Device opened successfully.");
195 /* Purge RX/TX buffers in the FTDI chip. */
196 if ((ret = ftdi_usb_purge_buffers(ctx->ftdic)) < 0) {
197 sr_err("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
198 __func__, ret, ftdi_get_error_string(ctx->ftdic));
199 (void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
200 goto err_dev_open_close_ftdic;
202 sr_dbg("la8: FTDI buffers purged successfully.");
204 /* Enable flow control in the FTDI chip. */
205 if ((ret = ftdi_setflowctrl(ctx->ftdic, SIO_RTS_CTS_HS)) < 0) {
206 sr_err("la8: %s: ftdi_setflowcontrol: (%d) %s",
207 __func__, ret, ftdi_get_error_string(ctx->ftdic));
208 (void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
209 goto err_dev_open_close_ftdic;
211 sr_dbg("la8: FTDI flow control enabled successfully.");
214 g_usleep(100 * 1000);
216 sdi->status = SR_ST_ACTIVE;
220 err_dev_open_close_ftdic:
221 (void) la8_close(ctx); /* Log, but ignore errors. */
225 static int hw_dev_close(struct sr_dev_inst *sdi)
229 if (!(ctx = sdi->priv)) {
230 sr_err("la8: %s: sdi->priv was NULL", __func__);
234 sr_dbg("la8: Closing device.");
236 if (sdi->status == SR_ST_ACTIVE) {
237 sr_dbg("la8: Status ACTIVE, closing device.");
238 /* TODO: Really ignore errors here, or return SR_ERR? */
239 (void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
241 sr_spew("la8: Status not ACTIVE, nothing to do.");
244 sdi->status = SR_ST_INACTIVE;
246 sr_dbg("la8: Freeing sample buffer.");
247 g_free(ctx->final_buf);
252 static int hw_cleanup(void)
260 static int hw_info_get(int info_id, const void **data,
261 const struct sr_dev_inst *sdi)
268 sr_spew("la8: %s: Returning sdi.", __func__);
273 case SR_DI_NUM_PROBES:
274 *data = GINT_TO_POINTER(NUM_PROBES);
275 sr_spew("la8: %s: Returning number of probes: %d.", __func__,
278 case SR_DI_PROBE_NAMES:
280 sr_spew("la8: %s: Returning probenames.", __func__);
282 case SR_DI_SAMPLERATES:
283 fill_supported_samplerates_if_needed();
284 *data = &samplerates;
285 sr_spew("la8: %s: Returning samplerates.", __func__);
287 case SR_DI_TRIGGER_TYPES:
288 *data = (char *)TRIGGER_TYPES;
289 sr_spew("la8: %s: Returning trigger types: %s.", __func__,
292 case SR_DI_CUR_SAMPLERATE:
295 *data = &ctx->cur_samplerate;
296 sr_spew("la8: %s: Returning samplerate: %" PRIu64 "Hz.",
297 __func__, ctx->cur_samplerate);
308 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
313 if (!(ctx = sdi->priv)) {
314 sr_err("la8: %s: sdi->priv was NULL", __func__);
319 case SR_HWCAP_SAMPLERATE:
320 if (set_samplerate(sdi, *(const uint64_t *)value) == SR_ERR) {
321 sr_err("la8: %s: setting samplerate failed.", __func__);
324 sr_dbg("la8: SAMPLERATE = %" PRIu64, ctx->cur_samplerate);
326 case SR_HWCAP_PROBECONFIG:
327 if (configure_probes(ctx, (const GSList *)value) != SR_OK) {
328 sr_err("la8: %s: probe config failed.", __func__);
332 case SR_HWCAP_LIMIT_MSEC:
333 if (*(const uint64_t *)value == 0) {
334 sr_err("la8: %s: LIMIT_MSEC can't be 0.", __func__);
337 ctx->limit_msec = *(const uint64_t *)value;
338 sr_dbg("la8: LIMIT_MSEC = %" PRIu64, ctx->limit_msec);
340 case SR_HWCAP_LIMIT_SAMPLES:
341 if (*(const uint64_t *)value < MIN_NUM_SAMPLES) {
342 sr_err("la8: %s: LIMIT_SAMPLES too small.", __func__);
345 ctx->limit_samples = *(const uint64_t *)value;
346 sr_dbg("la8: LIMIT_SAMPLES = %" PRIu64, ctx->limit_samples);
349 /* Unknown capability, return SR_ERR. */
350 sr_err("la8: %s: Unknown capability.", __func__);
358 static int receive_data(int fd, int revents, void *cb_data)
361 struct sr_dev_inst *sdi;
364 /* Avoid compiler errors. */
368 if (!(sdi = cb_data)) {
369 sr_err("la8: %s: cb_data was NULL", __func__);
373 if (!(ctx = sdi->priv)) {
374 sr_err("la8: %s: sdi->priv was NULL", __func__);
379 sr_err("la8: %s: ctx->ftdic was NULL", __func__);
383 /* Get one block of data. */
384 if ((ret = la8_read_block(ctx)) < 0) {
385 sr_err("la8: %s: la8_read_block error: %d", __func__, ret);
386 hw_dev_acquisition_stop(sdi, sdi);
390 /* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
391 if (ctx->block_counter != (NUM_BLOCKS - 1)) {
392 ctx->block_counter++;
396 sr_dbg("la8: Sampling finished, sending data to session bus now.");
398 /* All data was received and demangled, send it to the session bus. */
399 for (i = 0; i < NUM_BLOCKS; i++)
400 send_block_to_session_bus(ctx, i);
402 hw_dev_acquisition_stop(sdi, sdi);
404 // return FALSE; /* FIXME? */
408 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
412 struct sr_datafeed_packet packet;
413 struct sr_datafeed_header header;
414 struct sr_datafeed_meta_logic meta;
418 if (!(ctx = sdi->priv)) {
419 sr_err("la8: %s: sdi->priv was NULL", __func__);
424 sr_err("la8: %s: ctx->ftdic was NULL", __func__);
428 ctx->divcount = samplerate_to_divcount(ctx->cur_samplerate);
429 if (ctx->divcount == 0xff) {
430 sr_err("la8: %s: invalid divcount/samplerate", __func__);
434 sr_dbg("la8: Starting acquisition.");
436 /* Fill acquisition parameters into buf[]. */
437 buf[0] = ctx->divcount;
438 buf[1] = 0xff; /* This byte must always be 0xff. */
439 buf[2] = ctx->trigger_pattern;
440 buf[3] = ctx->trigger_mask;
442 /* Start acquisition. */
443 bytes_written = la8_write(ctx, buf, 4);
445 if (bytes_written < 0) {
446 sr_err("la8: Acquisition failed to start.");
448 } else if (bytes_written != 4) {
449 sr_err("la8: Acquisition failed to start.");
450 return SR_ERR; /* TODO: Other error and return code? */
453 sr_dbg("la8: Acquisition started successfully.");
455 ctx->session_dev_id = cb_data;
457 /* Send header packet to the session bus. */
458 sr_dbg("la8: Sending SR_DF_HEADER.");
459 packet.type = SR_DF_HEADER;
460 packet.payload = &header;
461 header.feed_version = 1;
462 gettimeofday(&header.starttime, NULL);
463 sr_session_send(ctx->session_dev_id, &packet);
465 /* Send metadata about the SR_DF_LOGIC packets to come. */
466 packet.type = SR_DF_META_LOGIC;
467 packet.payload = &meta;
468 meta.samplerate = ctx->cur_samplerate;
469 meta.num_probes = NUM_PROBES;
470 sr_session_send(ctx->session_dev_id, &packet);
472 /* Time when we should be done (for detecting trigger timeouts). */
473 ctx->done = (ctx->divcount + 1) * 0.08388608 + time(NULL)
474 + ctx->trigger_timeout;
475 ctx->block_counter = 0;
476 ctx->trigger_found = 0;
478 /* Hook up a dummy handler to receive data from the LA8. */
479 sr_source_add(-1, G_IO_IN, 0, receive_data, (void *)sdi);
484 static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
488 struct sr_datafeed_packet packet;
490 sr_dbg("la8: Stopping acquisition.");
492 if (!(ctx = sdi->priv)) {
493 sr_err("la8: %s: sdi->priv was NULL", __func__);
497 /* Send end packet to the session bus. */
498 sr_dbg("la8: Sending SR_DF_END.");
499 packet.type = SR_DF_END;
500 sr_session_send(cb_data, &packet);
505 SR_PRIV struct sr_dev_driver chronovu_la8_driver_info = {
506 .name = "chronovu-la8",
507 .longname = "ChronoVu LA8",
510 .cleanup = hw_cleanup,
512 .dev_open = hw_dev_open,
513 .dev_close = hw_dev_close,
514 .info_get = hw_info_get,
515 .dev_config_set = hw_dev_config_set,
516 .dev_acquisition_start = hw_dev_acquisition_start,
517 .dev_acquisition_stop = hw_dev_acquisition_stop,