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 *di = &chronovu_la8_driver_info;
31 /* This will be initialized via config_list()/SR_CONF_SAMPLERATE.
33 * Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz
34 * Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz
36 SR_PRIV uint64_t chronovu_la8_samplerates[255 + 1] = { 0 };
38 /* Note: Continuous sampling is not supported by the hardware. */
39 SR_PRIV const int32_t chronovu_la8_hwcaps[] = {
40 SR_CONF_LOGIC_ANALYZER,
42 SR_CONF_LIMIT_MSEC, /* TODO: Not yet implemented. */
43 SR_CONF_LIMIT_SAMPLES, /* TODO: Not yet implemented. */
47 * The ChronoVu LA8 can have multiple PIDs. Older versions shipped with
48 * a standard FTDI USB VID/PID of 0403:6001, newer ones have 0403:8867.
50 static const uint16_t usb_pids[] = {
55 /* Function prototypes. */
56 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
58 static int clear_instances(void)
61 struct sr_dev_inst *sdi;
62 struct drv_context *drvc;
63 struct dev_context *devc;
67 /* Properly close all devices. */
68 for (l = drvc->instances; l; l = l->next) {
69 if (!(sdi = l->data)) {
70 /* Log error, but continue cleaning up the rest. */
71 sr_err("%s: sdi was NULL, continuing.", __func__);
76 ftdi_free(devc->ftdic);
78 sr_dev_inst_free(sdi);
80 g_slist_free(drvc->instances);
81 drvc->instances = NULL;
86 static int hw_init(struct sr_context *sr_ctx)
88 return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
91 static GSList *hw_scan(GSList *options)
93 struct sr_dev_inst *sdi;
94 struct sr_probe *probe;
95 struct drv_context *drvc;
96 struct dev_context *devc;
107 /* Allocate memory for our private device context. */
108 if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
109 sr_err("Device context malloc failed.");
110 goto err_free_nothing;
113 /* Set some sane defaults. */
115 devc->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */
116 devc->limit_msec = 0;
117 devc->limit_samples = 0;
118 devc->cb_data = NULL;
119 memset(devc->mangled_buf, 0, BS);
120 devc->final_buf = NULL;
121 devc->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */
122 devc->trigger_mask = 0x00; /* All probes are "don't care". */
123 devc->trigger_timeout = 10; /* Default to 10s trigger timeout. */
124 devc->trigger_found = 0;
126 devc->block_counter = 0;
127 devc->divcount = 0; /* 10ns sample period == 100MHz samplerate */
130 /* Allocate memory where we'll store the de-mangled data. */
131 if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) {
132 sr_err("final_buf malloc failed.");
136 /* Allocate memory for the FTDI context (ftdic) and initialize it. */
137 if (!(devc->ftdic = ftdi_new())) {
138 sr_err("%s: ftdi_new failed.", __func__);
139 goto err_free_final_buf;
142 /* Check for the device and temporarily open it. */
143 for (i = 0; i < ARRAY_SIZE(usb_pids); i++) {
144 sr_dbg("Probing for VID/PID %04x:%04x.", USB_VENDOR_ID,
146 ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID,
147 usb_pids[i], USB_DESCRIPTION, NULL);
149 sr_dbg("Found LA8 device (%04x:%04x).",
150 USB_VENDOR_ID, usb_pids[i]);
151 devc->usb_pid = usb_pids[i];
155 if (devc->usb_pid == 0)
158 /* Register the device with libsigrok. */
159 sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING,
160 USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
162 sr_err("%s: sr_dev_inst_new failed.", __func__);
163 goto err_close_ftdic;
168 for (i = 0; chronovu_la8_probe_names[i]; i++) {
169 if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
170 chronovu_la8_probe_names[i])))
172 sdi->probes = g_slist_append(sdi->probes, probe);
175 devices = g_slist_append(devices, sdi);
176 drvc->instances = g_slist_append(drvc->instances, sdi);
178 /* Close device. We'll reopen it again when we need it. */
179 (void) la8_close(devc); /* Log, but ignore errors. */
184 (void) la8_close(devc); /* Log, but ignore errors. */
186 ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
188 g_free(devc->final_buf);
196 static GSList *hw_dev_list(void)
198 return ((struct drv_context *)(di->priv))->instances;
201 static int hw_dev_open(struct sr_dev_inst *sdi)
203 struct dev_context *devc;
206 if (!(devc = sdi->priv)) {
207 sr_err("%s: sdi->priv was NULL.", __func__);
211 sr_dbg("Opening LA8 device (%04x:%04x).", USB_VENDOR_ID,
214 /* Open the device. */
215 if ((ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID,
216 devc->usb_pid, USB_DESCRIPTION, NULL)) < 0) {
217 sr_err("%s: ftdi_usb_open_desc: (%d) %s",
218 __func__, ret, ftdi_get_error_string(devc->ftdic));
219 (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
222 sr_dbg("Device opened successfully.");
224 /* Purge RX/TX buffers in the FTDI chip. */
225 if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
226 sr_err("%s: ftdi_usb_purge_buffers: (%d) %s",
227 __func__, ret, ftdi_get_error_string(devc->ftdic));
228 (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
229 goto err_dev_open_close_ftdic;
231 sr_dbg("FTDI buffers purged successfully.");
233 /* Enable flow control in the FTDI chip. */
234 if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) {
235 sr_err("%s: ftdi_setflowcontrol: (%d) %s",
236 __func__, ret, ftdi_get_error_string(devc->ftdic));
237 (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
238 goto err_dev_open_close_ftdic;
240 sr_dbg("FTDI flow control enabled successfully.");
243 g_usleep(100 * 1000);
245 sdi->status = SR_ST_ACTIVE;
249 err_dev_open_close_ftdic:
250 (void) la8_close(devc); /* Log, but ignore errors. */
254 static int hw_dev_close(struct sr_dev_inst *sdi)
256 struct dev_context *devc;
260 if (sdi->status == SR_ST_ACTIVE) {
261 sr_dbg("Status ACTIVE, closing device.");
262 (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
264 sr_spew("Status not ACTIVE, nothing to do.");
267 sdi->status = SR_ST_INACTIVE;
269 g_free(devc->final_buf);
274 static int hw_cleanup(void)
277 /* Can get called on an unused driver, doesn't matter. */
285 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi)
287 struct dev_context *devc;
290 case SR_CONF_SAMPLERATE:
293 *data = g_variant_new_uint64(devc->cur_samplerate);
294 sr_spew("%s: Returning samplerate: %" PRIu64 "Hz.",
295 __func__, devc->cur_samplerate);
306 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
308 struct dev_context *devc;
310 if (!(devc = sdi->priv)) {
311 sr_err("%s: sdi->priv was NULL.", __func__);
316 case SR_CONF_SAMPLERATE:
317 if (set_samplerate(sdi, g_variant_get_uint64(data)) == SR_ERR) {
318 sr_err("%s: setting samplerate failed.", __func__);
321 sr_dbg("SAMPLERATE = %" PRIu64, devc->cur_samplerate);
323 case SR_CONF_LIMIT_MSEC:
324 if (g_variant_get_uint64(data) == 0) {
325 sr_err("%s: LIMIT_MSEC can't be 0.", __func__);
328 devc->limit_msec = g_variant_get_uint64(data);
329 sr_dbg("LIMIT_MSEC = %" PRIu64, devc->limit_msec);
331 case SR_CONF_LIMIT_SAMPLES:
332 if (g_variant_get_uint64(data) < MIN_NUM_SAMPLES) {
333 sr_err("%s: LIMIT_SAMPLES too small.", __func__);
336 devc->limit_samples = g_variant_get_uint64(data);
337 sr_dbg("LIMIT_SAMPLES = %" PRIu64, devc->limit_samples);
346 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
354 case SR_CONF_DEVICE_OPTIONS:
355 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
356 chronovu_la8_hwcaps, ARRAY_SIZE(chronovu_la8_hwcaps),
359 case SR_CONF_SAMPLERATE:
360 fill_supported_samplerates_if_needed();
361 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
362 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
363 chronovu_la8_samplerates, ARRAY_SIZE(chronovu_la8_samplerates),
365 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
366 *data = g_variant_builder_end(&gvb);
368 case SR_CONF_TRIGGER_TYPE:
369 *data = g_variant_new_string(TRIGGER_TYPE);
378 static int receive_data(int fd, int revents, void *cb_data)
381 struct sr_dev_inst *sdi;
382 struct dev_context *devc;
387 if (!(sdi = cb_data)) {
388 sr_err("%s: cb_data was NULL.", __func__);
392 if (!(devc = sdi->priv)) {
393 sr_err("%s: sdi->priv was NULL.", __func__);
398 sr_err("%s: devc->ftdic was NULL.", __func__);
402 /* Get one block of data. */
403 if ((ret = la8_read_block(devc)) < 0) {
404 sr_err("%s: la8_read_block error: %d.", __func__, ret);
405 hw_dev_acquisition_stop(sdi, sdi);
409 /* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
410 if (devc->block_counter != (NUM_BLOCKS - 1)) {
411 devc->block_counter++;
415 sr_dbg("Sampling finished, sending data to session bus now.");
417 /* All data was received and demangled, send it to the session bus. */
418 for (i = 0; i < NUM_BLOCKS; i++)
419 send_block_to_session_bus(devc, i);
421 hw_dev_acquisition_stop(sdi, sdi);
426 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
429 struct dev_context *devc;
433 if (!(devc = sdi->priv)) {
434 sr_err("%s: sdi->priv was NULL.", __func__);
439 sr_err("%s: devc->ftdic was NULL.", __func__);
443 devc->divcount = samplerate_to_divcount(devc->cur_samplerate);
444 if (devc->divcount == 0xff) {
445 sr_err("%s: Invalid divcount/samplerate.", __func__);
449 if (configure_probes(sdi) != SR_OK) {
450 sr_err("Failed to configure probes.");
454 /* Fill acquisition parameters into buf[]. */
455 buf[0] = devc->divcount;
456 buf[1] = 0xff; /* This byte must always be 0xff. */
457 buf[2] = devc->trigger_pattern;
458 buf[3] = devc->trigger_mask;
460 /* Start acquisition. */
461 bytes_written = la8_write(devc, buf, 4);
463 if (bytes_written < 0) {
464 sr_err("Acquisition failed to start: %d.", bytes_written);
466 } else if (bytes_written != 4) {
467 sr_err("Acquisition failed to start: %d.", bytes_written);
471 sr_dbg("Hardware acquisition started successfully.");
473 devc->cb_data = cb_data;
475 /* Send header packet to the session bus. */
476 std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
478 /* Time when we should be done (for detecting trigger timeouts). */
479 devc->done = (devc->divcount + 1) * 0.08388608 + time(NULL)
480 + devc->trigger_timeout;
481 devc->block_counter = 0;
482 devc->trigger_found = 0;
484 /* Hook up a dummy handler to receive data from the LA8. */
485 sr_source_add(-1, G_IO_IN, 0, receive_data, (void *)sdi);
490 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
492 struct sr_datafeed_packet packet;
496 sr_dbg("Stopping acquisition.");
497 sr_source_remove(-1);
499 /* Send end packet to the session bus. */
500 sr_dbg("Sending SR_DF_END.");
501 packet.type = SR_DF_END;
502 sr_session_send(cb_data, &packet);
507 SR_PRIV struct sr_dev_driver chronovu_la8_driver_info = {
508 .name = "chronovu-la8",
509 .longname = "ChronoVu LA8",
512 .cleanup = hw_cleanup,
514 .dev_list = hw_dev_list,
515 .dev_clear = clear_instances,
516 .config_get = config_get,
517 .config_set = config_set,
518 .config_list = config_list,
519 .dev_open = hw_dev_open,
520 .dev_close = hw_dev_close,
521 .dev_acquisition_start = hw_dev_acquisition_start,
522 .dev_acquisition_stop = hw_dev_acquisition_stop,