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;
48 struct drv_context *drvc;
49 struct dev_context *devc;
53 /* Properly close all devices. */
54 for (l = drvc->instances; l; l = l->next) {
55 if (!(sdi = l->data)) {
56 /* Log error, but continue cleaning up the rest. */
57 sr_err("la8: %s: sdi was NULL, continuing", __func__);
62 ftdi_free(devc->ftdic);
65 sr_dev_inst_free(sdi);
67 g_slist_free(drvc->instances);
68 drvc->instances = NULL;
72 static int hw_init(void)
74 struct drv_context *drvc;
76 if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
77 sr_err("chronovu-la8: driver context malloc failed.");
85 static GSList *hw_scan(GSList *options)
87 struct sr_dev_inst *sdi;
88 struct sr_probe *probe;
89 struct drv_context *drvc;
90 struct dev_context *devc;
99 /* Allocate memory for our private device context. */
100 if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
101 sr_err("la8: %s: struct context malloc failed", __func__);
102 goto err_free_nothing;
105 /* Set some sane defaults. */
107 devc->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */
108 devc->limit_msec = 0;
109 devc->limit_samples = 0;
110 devc->session_dev_id = NULL;
111 memset(devc->mangled_buf, 0, BS);
112 devc->final_buf = NULL;
113 devc->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */
114 devc->trigger_mask = 0x00; /* All probes are "don't care". */
115 devc->trigger_timeout = 10; /* Default to 10s trigger timeout. */
116 devc->trigger_found = 0;
118 devc->block_counter = 0;
119 devc->divcount = 0; /* 10ns sample period == 100MHz samplerate */
122 /* Allocate memory where we'll store the de-mangled data. */
123 if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) {
124 sr_err("la8: %s: final_buf malloc failed", __func__);
128 /* Allocate memory for the FTDI context (ftdic) and initialize it. */
129 if (!(devc->ftdic = ftdi_new())) {
130 sr_err("la8: %s: ftdi_new failed", __func__);
131 goto err_free_final_buf;
134 /* Check for the device and temporarily open it. */
135 for (i = 0; i < ARRAY_SIZE(usb_pids); i++) {
136 sr_dbg("la8: Probing for VID/PID %04x:%04x.", USB_VENDOR_ID,
138 ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID,
139 usb_pids[i], USB_DESCRIPTION, NULL);
141 sr_dbg("la8: Found LA8 device (%04x:%04x).",
142 USB_VENDOR_ID, usb_pids[i]);
143 devc->usb_pid = usb_pids[i];
147 if (devc->usb_pid == 0)
150 /* Register the device with libsigrok. */
151 sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING,
152 USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
154 sr_err("la8: %s: sr_dev_inst_new failed", __func__);
155 goto err_close_ftdic;
160 for (i = 0; probe_names[i]; i++) {
161 if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE,
164 sdi->probes = g_slist_append(sdi->probes, probe);
167 devices = g_slist_append(devices, sdi);
168 drvc->instances = g_slist_append(drvc->instances, sdi);
170 sr_spew("la8: Device init successful.");
172 /* Close device. We'll reopen it again when we need it. */
173 (void) la8_close(devc); /* Log, but ignore errors. */
178 (void) la8_close(devc); /* Log, but ignore errors. */
180 free(devc->ftdic); /* NOT g_free()! */
182 g_free(devc->final_buf);
190 static int hw_dev_open(struct sr_dev_inst *sdi)
192 struct dev_context *devc;
195 if (!(devc = sdi->priv)) {
196 sr_err("la8: %s: sdi->priv was NULL", __func__);
200 sr_dbg("la8: Opening LA8 device (%04x:%04x).", USB_VENDOR_ID,
203 /* Open the device. */
204 if ((ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID,
205 devc->usb_pid, USB_DESCRIPTION, NULL)) < 0) {
206 sr_err("la8: %s: ftdi_usb_open_desc: (%d) %s",
207 __func__, ret, ftdi_get_error_string(devc->ftdic));
208 (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
211 sr_dbg("la8: Device opened successfully.");
213 /* Purge RX/TX buffers in the FTDI chip. */
214 if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
215 sr_err("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
216 __func__, ret, ftdi_get_error_string(devc->ftdic));
217 (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
218 goto err_dev_open_close_ftdic;
220 sr_dbg("la8: FTDI buffers purged successfully.");
222 /* Enable flow control in the FTDI chip. */
223 if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) {
224 sr_err("la8: %s: ftdi_setflowcontrol: (%d) %s",
225 __func__, ret, ftdi_get_error_string(devc->ftdic));
226 (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
227 goto err_dev_open_close_ftdic;
229 sr_dbg("la8: FTDI flow control enabled successfully.");
232 g_usleep(100 * 1000);
234 sdi->status = SR_ST_ACTIVE;
238 err_dev_open_close_ftdic:
239 (void) la8_close(devc); /* Log, but ignore errors. */
243 static int hw_dev_close(struct sr_dev_inst *sdi)
245 struct dev_context *devc;
247 if (!(devc = sdi->priv)) {
248 sr_err("la8: %s: sdi->priv was NULL", __func__);
252 sr_dbg("la8: Closing device.");
254 if (sdi->status == SR_ST_ACTIVE) {
255 sr_dbg("la8: Status ACTIVE, closing device.");
256 /* TODO: Really ignore errors here, or return SR_ERR? */
257 (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
259 sr_spew("la8: Status not ACTIVE, nothing to do.");
262 sdi->status = SR_ST_INACTIVE;
264 sr_dbg("la8: Freeing sample buffer.");
265 g_free(devc->final_buf);
270 static int hw_cleanup(void)
281 static int hw_info_get(int info_id, const void **data,
282 const struct sr_dev_inst *sdi)
284 struct dev_context *devc;
290 case SR_DI_NUM_PROBES:
291 *data = GINT_TO_POINTER(NUM_PROBES);
292 sr_spew("la8: %s: Returning number of probes: %d.", __func__,
295 case SR_DI_PROBE_NAMES:
297 sr_spew("la8: %s: Returning probenames.", __func__);
299 case SR_DI_SAMPLERATES:
300 fill_supported_samplerates_if_needed();
301 *data = &samplerates;
302 sr_spew("la8: %s: Returning samplerates.", __func__);
304 case SR_DI_TRIGGER_TYPES:
305 *data = (char *)TRIGGER_TYPES;
306 sr_spew("la8: %s: Returning trigger types: %s.", __func__,
309 case SR_DI_CUR_SAMPLERATE:
312 *data = &devc->cur_samplerate;
313 sr_spew("la8: %s: Returning samplerate: %" PRIu64 "Hz.",
314 __func__, devc->cur_samplerate);
325 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
328 struct dev_context *devc;
330 if (!(devc = sdi->priv)) {
331 sr_err("la8: %s: sdi->priv was NULL", __func__);
336 case SR_HWCAP_SAMPLERATE:
337 if (set_samplerate(sdi, *(const uint64_t *)value) == SR_ERR) {
338 sr_err("la8: %s: setting samplerate failed.", __func__);
341 sr_dbg("la8: SAMPLERATE = %" PRIu64, devc->cur_samplerate);
343 case SR_HWCAP_PROBECONFIG:
344 if (configure_probes(devc, (const GSList *)value) != SR_OK) {
345 sr_err("la8: %s: probe config failed.", __func__);
349 case SR_HWCAP_LIMIT_MSEC:
350 if (*(const uint64_t *)value == 0) {
351 sr_err("la8: %s: LIMIT_MSEC can't be 0.", __func__);
354 devc->limit_msec = *(const uint64_t *)value;
355 sr_dbg("la8: LIMIT_MSEC = %" PRIu64, devc->limit_msec);
357 case SR_HWCAP_LIMIT_SAMPLES:
358 if (*(const uint64_t *)value < MIN_NUM_SAMPLES) {
359 sr_err("la8: %s: LIMIT_SAMPLES too small.", __func__);
362 devc->limit_samples = *(const uint64_t *)value;
363 sr_dbg("la8: LIMIT_SAMPLES = %" PRIu64, devc->limit_samples);
366 /* Unknown capability, return SR_ERR. */
367 sr_err("la8: %s: Unknown capability.", __func__);
375 static int receive_data(int fd, int revents, void *cb_data)
378 struct sr_dev_inst *sdi;
379 struct dev_context *devc;
381 /* Avoid compiler errors. */
385 if (!(sdi = cb_data)) {
386 sr_err("la8: %s: cb_data was NULL", __func__);
390 if (!(devc = sdi->priv)) {
391 sr_err("la8: %s: sdi->priv was NULL", __func__);
396 sr_err("la8: %s: devc->ftdic was NULL", __func__);
400 /* Get one block of data. */
401 if ((ret = la8_read_block(devc)) < 0) {
402 sr_err("la8: %s: la8_read_block error: %d", __func__, ret);
403 hw_dev_acquisition_stop(sdi, sdi);
407 /* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
408 if (devc->block_counter != (NUM_BLOCKS - 1)) {
409 devc->block_counter++;
413 sr_dbg("la8: Sampling finished, sending data to session bus now.");
415 /* All data was received and demangled, send it to the session bus. */
416 for (i = 0; i < NUM_BLOCKS; i++)
417 send_block_to_session_bus(devc, i);
419 hw_dev_acquisition_stop(sdi, sdi);
421 // return FALSE; /* FIXME? */
425 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
428 struct dev_context *devc;
429 struct sr_datafeed_packet packet;
430 struct sr_datafeed_header header;
431 struct sr_datafeed_meta_logic meta;
435 if (!(devc = sdi->priv)) {
436 sr_err("la8: %s: sdi->priv was NULL", __func__);
441 sr_err("la8: %s: devc->ftdic was NULL", __func__);
445 devc->divcount = samplerate_to_divcount(devc->cur_samplerate);
446 if (devc->divcount == 0xff) {
447 sr_err("la8: %s: invalid divcount/samplerate", __func__);
451 sr_dbg("la8: Starting acquisition.");
453 /* Fill acquisition parameters into buf[]. */
454 buf[0] = devc->divcount;
455 buf[1] = 0xff; /* This byte must always be 0xff. */
456 buf[2] = devc->trigger_pattern;
457 buf[3] = devc->trigger_mask;
459 /* Start acquisition. */
460 bytes_written = la8_write(devc, buf, 4);
462 if (bytes_written < 0) {
463 sr_err("la8: Acquisition failed to start.");
465 } else if (bytes_written != 4) {
466 sr_err("la8: Acquisition failed to start.");
467 return SR_ERR; /* TODO: Other error and return code? */
470 sr_dbg("la8: Acquisition started successfully.");
472 devc->session_dev_id = cb_data;
474 /* Send header packet to the session bus. */
475 sr_dbg("la8: Sending SR_DF_HEADER.");
476 packet.type = SR_DF_HEADER;
477 packet.payload = &header;
478 header.feed_version = 1;
479 gettimeofday(&header.starttime, NULL);
480 sr_session_send(devc->session_dev_id, &packet);
482 /* Send metadata about the SR_DF_LOGIC packets to come. */
483 packet.type = SR_DF_META_LOGIC;
484 packet.payload = &meta;
485 meta.samplerate = devc->cur_samplerate;
486 meta.num_probes = NUM_PROBES;
487 sr_session_send(devc->session_dev_id, &packet);
489 /* Time when we should be done (for detecting trigger timeouts). */
490 devc->done = (devc->divcount + 1) * 0.08388608 + time(NULL)
491 + devc->trigger_timeout;
492 devc->block_counter = 0;
493 devc->trigger_found = 0;
495 /* Hook up a dummy handler to receive data from the LA8. */
496 sr_source_add(-1, G_IO_IN, 0, receive_data, (void *)sdi);
501 static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
504 struct dev_context *devc;
505 struct sr_datafeed_packet packet;
507 sr_dbg("la8: Stopping acquisition.");
509 if (!(devc = sdi->priv)) {
510 sr_err("la8: %s: sdi->priv was NULL", __func__);
514 /* Send end packet to the session bus. */
515 sr_dbg("la8: Sending SR_DF_END.");
516 packet.type = SR_DF_END;
517 sr_session_send(cb_data, &packet);
522 SR_PRIV struct sr_dev_driver chronovu_la8_driver_info = {
523 .name = "chronovu-la8",
524 .longname = "ChronoVu LA8",
527 .cleanup = hw_cleanup,
529 .dev_open = hw_dev_open,
530 .dev_close = hw_dev_close,
531 .info_get = hw_info_get,
532 .dev_config_set = hw_dev_config_set,
533 .dev_acquisition_start = hw_dev_acquisition_start,
534 .dev_acquisition_stop = hw_dev_acquisition_stop,