]> sigrok.org Git - libsigrok.git/blob - src/hardware/chronovu-la/api.c
Change sr_dev_inst_new() to take no parameters.
[libsigrok.git] / src / hardware / chronovu-la / api.c
1 /*
2  * This file is part of the libsigrok project.
3  *
4  * Copyright (C) 2011-2014 Uwe Hermann <uwe@hermann-uwe.de>
5  *
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.
10  *
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.
15  *
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
19  */
20
21 #include "protocol.h"
22
23 SR_PRIV struct sr_dev_driver chronovu_la_driver_info;
24 static struct sr_dev_driver *di = &chronovu_la_driver_info;
25
26 static const uint32_t devopts[] = {
27         SR_CONF_LOGIC_ANALYZER,
28         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
29         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET | SR_CONF_LIST,
30         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
31         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
32 };
33
34 static const int32_t trigger_matches[] = {
35         SR_TRIGGER_ZERO,
36         SR_TRIGGER_ONE,
37         SR_TRIGGER_RISING,
38         SR_TRIGGER_FALLING,
39 };
40
41 /* The ChronoVu LA8/LA16 can have multiple VID/PID pairs. */
42 static struct {
43         uint16_t vid;
44         uint16_t pid;
45         int model;
46         const char *iproduct;
47 } vid_pid[] = {
48         { 0x0403, 0x6001, CHRONOVU_LA8,  "ChronoVu LA8"  },
49         { 0x0403, 0x8867, CHRONOVU_LA8,  "ChronoVu LA8"  },
50         { 0x0403, 0x6001, CHRONOVU_LA16, "ChronoVu LA16" },
51         { 0x0403, 0x8867, CHRONOVU_LA16, "ChronoVu LA16" },
52 };
53
54 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
55
56 static void clear_helper(void *priv)
57 {
58         struct dev_context *devc;
59
60         devc = priv;
61
62         ftdi_free(devc->ftdic);
63         g_free(devc->final_buf);
64 }
65
66 static int dev_clear(void)
67 {
68         return std_dev_clear(di, clear_helper);
69 }
70
71 static int init(struct sr_context *sr_ctx)
72 {
73         return std_init(sr_ctx, di, LOG_PREFIX);
74 }
75
76 static int add_device(int idx, int model, GSList **devices)
77 {
78         int ret;
79         unsigned int i;
80         struct sr_dev_inst *sdi;
81         struct drv_context *drvc;
82         struct dev_context *devc;
83         struct sr_channel *ch;
84
85         ret = SR_OK;
86
87         drvc = di->priv;
88
89         /* Allocate memory for our private device context. */
90         devc = g_try_malloc(sizeof(struct dev_context));
91
92         /* Set some sane defaults. */
93         devc->prof = &cv_profiles[model];
94         devc->ftdic = NULL; /* Will be set in the open() API call. */
95         devc->cur_samplerate = 0; /* Set later (different for LA8/LA16). */
96         devc->limit_msec = 0;
97         devc->limit_samples = 0;
98         devc->cb_data = NULL;
99         memset(devc->mangled_buf, 0, BS);
100         devc->final_buf = NULL;
101         devc->trigger_pattern = 0x0000; /* Irrelevant, see trigger_mask. */
102         devc->trigger_mask = 0x0000; /* All channels: "don't care". */
103         devc->trigger_edgemask = 0x0000; /* All channels: "state triggered". */
104         devc->trigger_found = 0;
105         devc->done = 0;
106         devc->block_counter = 0;
107         devc->divcount = 0;
108         devc->usb_vid = vid_pid[idx].vid;
109         devc->usb_pid = vid_pid[idx].pid;
110         memset(devc->samplerates, 0, sizeof(uint64_t) * 255);
111
112         /* Allocate memory where we'll store the de-mangled data. */
113         if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) {
114                 sr_err("Failed to allocate memory for sample buffer.");
115                 ret = SR_ERR_MALLOC;
116                 goto err_free_devc;
117         }
118
119         /* We now know the device, set its max. samplerate as default. */
120         devc->cur_samplerate = devc->prof->max_samplerate;
121
122         /* Register the device with libsigrok. */
123         sdi = sr_dev_inst_new();
124         sdi->status = SR_ST_INITIALIZING;
125         sdi->vendor = g_strdup("ChronoVu");
126         sdi->model = g_strdup(devc->prof->modelname);
127         sdi->driver = di;
128         sdi->priv = devc;
129
130         for (i = 0; i < devc->prof->num_channels; i++) {
131                 if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
132                                           cv_channel_names[i]))) {
133                         ret = SR_ERR;
134                         goto err_free_dev_inst;
135                 }
136                 sdi->channels = g_slist_append(sdi->channels, ch);
137         }
138
139         *devices = g_slist_append(*devices, sdi);
140         drvc->instances = g_slist_append(drvc->instances, sdi);
141
142         if (ret == SR_OK)
143                 return SR_OK;
144
145 err_free_dev_inst:
146         sr_dev_inst_free(sdi);
147         g_free(devc->final_buf);
148 err_free_devc:
149         g_free(devc);
150
151         return ret;
152 }
153
154 static GSList *scan(GSList *options)
155 {
156         int ret;
157         unsigned int i;
158         GSList *devices;
159         struct ftdi_context *ftdic;
160
161         (void)options;
162
163         devices = NULL;
164
165         /* Allocate memory for the FTDI context and initialize it. */
166         if (!(ftdic = ftdi_new())) {
167                 sr_err("Failed to initialize libftdi.");
168                 return NULL;
169         }
170
171         /* Check for LA8 and/or LA16 devices with various VID/PIDs. */
172         for (i = 0; i < ARRAY_SIZE(vid_pid); i++) {
173                 ret = ftdi_usb_open_desc(ftdic, vid_pid[i].vid,
174                         vid_pid[i].pid, vid_pid[i].iproduct, NULL);
175                 /* Show errors other than "device not found". */
176                 if (ret < 0 && ret != -3)
177                         sr_dbg("Error finding/opening device (%d): %s.",
178                                ret, ftdi_get_error_string(ftdic));
179                 if (ret < 0)
180                         continue; /* No device found, or not usable. */
181
182                 sr_dbg("Found %s device (%04x:%04x).",
183                        vid_pid[i].iproduct, vid_pid[i].vid, vid_pid[i].pid);
184
185                 if ((ret = add_device(i, vid_pid[i].model, &devices)) < 0)
186                         sr_dbg("Failed to add device: %d.", ret);
187
188                 if ((ret = ftdi_usb_close(ftdic)) < 0)
189                         sr_dbg("Failed to close FTDI device (%d): %s.",
190                                ret, ftdi_get_error_string(ftdic));
191         }
192
193         /* Close USB device, deinitialize and free the FTDI context. */
194         ftdi_free(ftdic);
195         ftdic = NULL;
196
197         return devices;
198 }
199
200 static GSList *dev_list(void)
201 {
202         return ((struct drv_context *)(di->priv))->instances;
203 }
204
205 static int dev_open(struct sr_dev_inst *sdi)
206 {
207         struct dev_context *devc;
208         int ret;
209
210         if (!(devc = sdi->priv))
211                 return SR_ERR_BUG;
212
213         /* Allocate memory for the FTDI context and initialize it. */
214         if (!(devc->ftdic = ftdi_new())) {
215                 sr_err("Failed to initialize libftdi.");
216                 return SR_ERR;
217         }
218
219         sr_dbg("Opening %s device (%04x:%04x).", devc->prof->modelname,
220                devc->usb_vid, devc->usb_pid);
221
222         /* Open the device. */
223         if ((ret = ftdi_usb_open_desc(devc->ftdic, devc->usb_vid,
224                         devc->usb_pid, devc->prof->iproduct, NULL)) < 0) {
225                 sr_err("Failed to open FTDI device (%d): %s.",
226                        ret, ftdi_get_error_string(devc->ftdic));
227                 goto err_ftdi_free;
228         }
229         sr_dbg("Device opened successfully.");
230
231         /* Purge RX/TX buffers in the FTDI chip. */
232         if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
233                 sr_err("Failed to purge FTDI buffers (%d): %s.",
234                        ret, ftdi_get_error_string(devc->ftdic));
235                 goto err_ftdi_free;
236         }
237         sr_dbg("FTDI buffers purged successfully.");
238
239         /* Enable flow control in the FTDI chip. */
240         if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) {
241                 sr_err("Failed to enable FTDI flow control (%d): %s.",
242                        ret, ftdi_get_error_string(devc->ftdic));
243                 goto err_ftdi_free;
244         }
245         sr_dbg("FTDI flow control enabled successfully.");
246
247         /* Wait 100ms. */
248         g_usleep(100 * 1000);
249
250         sdi->status = SR_ST_ACTIVE;
251
252         if (ret == SR_OK)
253                 return SR_OK;
254
255 err_ftdi_free:
256         ftdi_free(devc->ftdic); /* Close device (if open), free FTDI context. */
257         devc->ftdic = NULL;
258         return ret;
259 }
260
261 static int dev_close(struct sr_dev_inst *sdi)
262 {
263         int ret;
264         struct dev_context *devc;
265
266         if (sdi->status != SR_ST_ACTIVE)
267                 return SR_OK;
268
269         devc = sdi->priv;
270
271         if (devc->ftdic && (ret = ftdi_usb_close(devc->ftdic)) < 0)
272                 sr_err("Failed to close FTDI device (%d): %s.",
273                        ret, ftdi_get_error_string(devc->ftdic));
274         sdi->status = SR_ST_INACTIVE;
275
276         return SR_OK;
277 }
278
279 static int cleanup(void)
280 {
281         return dev_clear();
282 }
283
284 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
285                 const struct sr_channel_group *cg)
286 {
287         struct dev_context *devc;
288
289         (void)cg;
290
291         switch (key) {
292         case SR_CONF_SAMPLERATE:
293                 if (!sdi || !(devc = sdi->priv))
294                         return SR_ERR_BUG;
295                 *data = g_variant_new_uint64(devc->cur_samplerate);
296                 break;
297         default:
298                 return SR_ERR_NA;
299         }
300
301         return SR_OK;
302 }
303
304 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
305                 const struct sr_channel_group *cg)
306 {
307         struct dev_context *devc;
308
309         (void)cg;
310
311         if (sdi->status != SR_ST_ACTIVE)
312                 return SR_ERR_DEV_CLOSED;
313
314         if (!(devc = sdi->priv))
315                 return SR_ERR_BUG;
316
317         switch (key) {
318         case SR_CONF_SAMPLERATE:
319                 if (cv_set_samplerate(sdi, g_variant_get_uint64(data)) < 0)
320                         return SR_ERR;
321                 break;
322         case SR_CONF_LIMIT_MSEC:
323                 if (g_variant_get_uint64(data) == 0)
324                         return SR_ERR_ARG;
325                 devc->limit_msec = g_variant_get_uint64(data);
326                 break;
327         case SR_CONF_LIMIT_SAMPLES:
328                 if (g_variant_get_uint64(data) == 0)
329                         return SR_ERR_ARG;
330                 devc->limit_samples = g_variant_get_uint64(data);
331                 break;
332         default:
333                 return SR_ERR_NA;
334         }
335
336         return SR_OK;
337 }
338
339 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
340                 const struct sr_channel_group *cg)
341 {
342         GVariant *gvar, *grange[2];
343         GVariantBuilder gvb;
344         struct dev_context *devc;
345
346         (void)cg;
347
348         switch (key) {
349         case SR_CONF_DEVICE_OPTIONS:
350                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
351                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
352                 break;
353         case SR_CONF_SAMPLERATE:
354                 if (!sdi || !sdi->priv || !(devc = sdi->priv))
355                         return SR_ERR_BUG;
356                 cv_fill_samplerates_if_needed(sdi);
357                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
358                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
359                                 devc->samplerates,
360                                 ARRAY_SIZE(devc->samplerates),
361                                 sizeof(uint64_t));
362                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
363                 *data = g_variant_builder_end(&gvb);
364                 break;
365         case SR_CONF_LIMIT_SAMPLES:
366                 if (!sdi || !sdi->priv || !(devc = sdi->priv) || !devc->prof)
367                         return SR_ERR_BUG;
368                 grange[0] = g_variant_new_uint64(0);
369                 if (devc->prof->model == CHRONOVU_LA8)
370                         grange[1] = g_variant_new_uint64(MAX_NUM_SAMPLES);
371                 else
372                         grange[1] = g_variant_new_uint64(MAX_NUM_SAMPLES / 2);
373                 *data = g_variant_new_tuple(grange, 2);
374                 break;
375         case SR_CONF_TRIGGER_MATCH:
376                 if (!sdi || !sdi->priv || !(devc = sdi->priv) || !devc->prof)
377                         return SR_ERR_BUG;
378                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
379                                 trigger_matches, devc->prof->num_trigger_matches,
380                                 sizeof(int32_t));
381                 break;
382         default:
383                 return SR_ERR_NA;
384         }
385
386         return SR_OK;
387 }
388
389 static int receive_data(int fd, int revents, void *cb_data)
390 {
391         int i, ret;
392         struct sr_dev_inst *sdi;
393         struct dev_context *devc;
394
395         (void)fd;
396         (void)revents;
397
398         if (!(sdi = cb_data)) {
399                 sr_err("cb_data was NULL.");
400                 return FALSE;
401         }
402
403         if (!(devc = sdi->priv)) {
404                 sr_err("sdi->priv was NULL.");
405                 return FALSE;
406         }
407
408         if (!devc->ftdic) {
409                 sr_err("devc->ftdic was NULL.");
410                 return FALSE;
411         }
412
413         /* Get one block of data. */
414         if ((ret = cv_read_block(devc)) < 0) {
415                 sr_err("Failed to read data block: %d.", ret);
416                 dev_acquisition_stop(sdi, sdi);
417                 return FALSE;
418         }
419
420         /* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
421         if (devc->block_counter != (NUM_BLOCKS - 1)) {
422                 devc->block_counter++;
423                 return TRUE;
424         }
425
426         sr_dbg("Sampling finished, sending data to session bus now.");
427
428         /*
429          * All data was received and demangled, send it to the session bus.
430          *
431          * Note: Due to the method how data is spread across the 8MByte of
432          * SDRAM, we can _not_ send it to the session bus in a streaming
433          * manner while we receive it. We have to receive and de-mangle the
434          * full 8MByte first, only then the whole buffer contains valid data.
435          */
436         for (i = 0; i < NUM_BLOCKS; i++)
437                 cv_send_block_to_session_bus(devc, i);
438
439         dev_acquisition_stop(sdi, sdi);
440
441         return TRUE;
442 }
443
444 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
445 {
446         struct dev_context *devc;
447         uint8_t buf[8];
448         int bytes_to_write, bytes_written;
449
450         if (sdi->status != SR_ST_ACTIVE)
451                 return SR_ERR_DEV_CLOSED;
452
453         if (!(devc = sdi->priv)) {
454                 sr_err("sdi->priv was NULL.");
455                 return SR_ERR_BUG;
456         }
457
458         if (!devc->ftdic) {
459                 sr_err("devc->ftdic was NULL.");
460                 return SR_ERR_BUG;
461         }
462
463         devc->divcount = cv_samplerate_to_divcount(sdi, devc->cur_samplerate);
464         if (devc->divcount == 0xff) {
465                 sr_err("Invalid divcount/samplerate.");
466                 return SR_ERR;
467         }
468
469         if (cv_convert_trigger(sdi) != SR_OK) {
470                 sr_err("Failed to configure trigger.");
471                 return SR_ERR;
472         }
473
474         /* Fill acquisition parameters into buf[]. */
475         if (devc->prof->model == CHRONOVU_LA8) {
476                 buf[0] = devc->divcount;
477                 buf[1] = 0xff; /* This byte must always be 0xff. */
478                 buf[2] = devc->trigger_pattern & 0xff;
479                 buf[3] = devc->trigger_mask & 0xff;
480                 bytes_to_write = 4;
481         } else {
482                 buf[0] = devc->divcount;
483                 buf[1] = 0xff; /* This byte must always be 0xff. */
484                 buf[2] = (devc->trigger_pattern & 0xff00) >> 8;  /* LSB */
485                 buf[3] = (devc->trigger_pattern & 0x00ff) >> 0;  /* MSB */
486                 buf[4] = (devc->trigger_mask & 0xff00) >> 8;     /* LSB */
487                 buf[5] = (devc->trigger_mask & 0x00ff) >> 0;     /* MSB */
488                 buf[6] = (devc->trigger_edgemask & 0xff00) >> 8; /* LSB */
489                 buf[7] = (devc->trigger_edgemask & 0x00ff) >> 0; /* MSB */
490                 bytes_to_write = 8;
491         }
492
493         /* Start acquisition. */
494         bytes_written = cv_write(devc, buf, bytes_to_write);
495
496         if (bytes_written < 0 || bytes_written != bytes_to_write) {
497                 sr_err("Acquisition failed to start.");
498                 return SR_ERR;
499         }
500
501         sr_dbg("Hardware acquisition started successfully.");
502
503         devc->cb_data = cb_data;
504
505         /* Send header packet to the session bus. */
506         std_session_send_df_header(sdi, LOG_PREFIX);
507
508         /* Time when we should be done (for detecting trigger timeouts). */
509         devc->done = (devc->divcount + 1) * devc->prof->trigger_constant +
510                         g_get_monotonic_time() + (10 * G_TIME_SPAN_SECOND);
511         devc->block_counter = 0;
512         devc->trigger_found = 0;
513
514         /* Hook up a dummy handler to receive data from the device. */
515         sr_session_source_add(sdi->session, -1, G_IO_IN, 0, receive_data, (void *)sdi);
516
517         return SR_OK;
518 }
519
520 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
521 {
522         struct sr_datafeed_packet packet;
523
524         (void)cb_data;
525
526         sr_dbg("Stopping acquisition.");
527         sr_session_source_remove(sdi->session, -1);
528
529         /* Send end packet to the session bus. */
530         sr_dbg("Sending SR_DF_END.");
531         packet.type = SR_DF_END;
532         sr_session_send(sdi, &packet);
533
534         return SR_OK;
535 }
536
537 SR_PRIV struct sr_dev_driver chronovu_la_driver_info = {
538         .name = "chronovu-la",
539         .longname = "ChronoVu LA8/LA16",
540         .api_version = 1,
541         .init = init,
542         .cleanup = cleanup,
543         .scan = scan,
544         .dev_list = dev_list,
545         .dev_clear = dev_clear,
546         .config_get = config_get,
547         .config_set = config_set,
548         .config_list = config_list,
549         .dev_open = dev_open,
550         .dev_close = dev_close,
551         .dev_acquisition_start = dev_acquisition_start,
552         .dev_acquisition_stop = dev_acquisition_stop,
553         .priv = NULL,
554 };