]> sigrok.org Git - libsigrok.git/blob - src/hardware/ikalogic-scanaplus/api.c
Change sr_dev_inst_new() to take no parameters.
[libsigrok.git] / src / hardware / ikalogic-scanaplus / api.c
1 /*
2  * This file is part of the libsigrok project.
3  *
4  * Copyright (C) 2013 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 #define USB_VENDOR_ID                   0x0403
24 #define USB_DEVICE_ID                   0x6014
25 #define USB_VENDOR_NAME                 "IKALOGIC"
26 #define USB_MODEL_NAME                  "ScanaPLUS"
27 #define USB_IPRODUCT                    "SCANAPLUS"
28
29 #define SAMPLE_BUF_SIZE                 (8 * 1024 * 1024)
30
31 static const uint32_t devopts[] = {
32         SR_CONF_LOGIC_ANALYZER,
33         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
34         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
35         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
36 };
37
38 /* Channels are numbered 1-9. */
39 static const char *channel_names[] = {
40         "1", "2", "3", "4", "5", "6", "7", "8", "9",
41         NULL,
42 };
43
44 /* Note: The IKALOGIC ScanaPLUS always samples at 100MHz. */
45 static uint64_t samplerates[1] = { SR_MHZ(100) };
46
47 SR_PRIV struct sr_dev_driver ikalogic_scanaplus_driver_info;
48 static struct sr_dev_driver *di = &ikalogic_scanaplus_driver_info;
49
50 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
51
52 static void clear_helper(void *priv)
53 {
54         struct dev_context *devc;
55
56         devc = priv;
57
58         ftdi_free(devc->ftdic);
59         g_free(devc->compressed_buf);
60         g_free(devc->sample_buf);
61         g_free(devc);
62 }
63
64 static int dev_clear(void)
65 {
66         return std_dev_clear(di, clear_helper);
67 }
68
69 static int init(struct sr_context *sr_ctx)
70 {
71         return std_init(sr_ctx, di, LOG_PREFIX);
72 }
73
74 static GSList *scan(GSList *options)
75 {
76         struct sr_dev_inst *sdi;
77         struct sr_channel *ch;
78         struct drv_context *drvc;
79         struct dev_context *devc;
80         GSList *devices;
81         unsigned int i;
82         int ret;
83
84         (void)options;
85
86         drvc = di->priv;
87
88         devices = NULL;
89
90         /* Allocate memory for our private device context. */
91         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
92                 sr_err("Device context malloc failed.");
93                 goto err_free_nothing;
94         }
95
96         /* Allocate memory for the incoming compressed samples. */
97         if (!(devc->compressed_buf = g_try_malloc0(COMPRESSED_BUF_SIZE))) {
98                 sr_err("compressed_buf malloc failed.");
99                 goto err_free_devc;
100         }
101
102         /* Allocate memory for the uncompressed samples. */
103         if (!(devc->sample_buf = g_try_malloc0(SAMPLE_BUF_SIZE))) {
104                 sr_err("sample_buf malloc failed.");
105                 goto err_free_compressed_buf;
106         }
107
108         /* Allocate memory for the FTDI context (ftdic) and initialize it. */
109         if (!(devc->ftdic = ftdi_new())) {
110                 sr_err("Failed to initialize libftdi.");
111                 goto err_free_sample_buf;
112         }
113
114         /* Check for the device and temporarily open it. */
115         ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
116                                  USB_IPRODUCT, NULL);
117         if (ret < 0) {
118                 /* Log errors, except for -3 ("device not found"). */
119                 if (ret != -3)
120                         sr_err("Failed to open device (%d): %s", ret,
121                                ftdi_get_error_string(devc->ftdic));
122                 goto err_free_ftdic;
123         }
124
125         /* Register the device with libsigrok. */
126         sdi = sr_dev_inst_new();
127         sdi->status = SR_ST_INITIALIZING;
128         sdi->vendor = g_strdup(USB_VENDOR_NAME);
129         sdi->model = g_strdup(USB_MODEL_NAME);
130         sdi->driver = di;
131         sdi->priv = devc;
132
133         for (i = 0; channel_names[i]; i++) {
134                 if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
135                                            channel_names[i])))
136                         return NULL;
137                 sdi->channels = g_slist_append(sdi->channels, ch);
138         }
139
140         devices = g_slist_append(devices, sdi);
141         drvc->instances = g_slist_append(drvc->instances, sdi);
142
143         /* Close device. We'll reopen it again when we need it. */
144         scanaplus_close(devc);
145
146         return devices;
147
148         scanaplus_close(devc);
149 err_free_ftdic:
150         ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
151 err_free_sample_buf:
152         g_free(devc->sample_buf);
153 err_free_compressed_buf:
154         g_free(devc->compressed_buf);
155 err_free_devc:
156         g_free(devc);
157 err_free_nothing:
158
159         return NULL;
160 }
161
162 static GSList *dev_list(void)
163 {
164         return ((struct drv_context *)(di->priv))->instances;
165 }
166
167 static int dev_open(struct sr_dev_inst *sdi)
168 {
169         struct dev_context *devc;
170         int ret;
171
172         devc = sdi->priv;
173
174         /* Select interface A, otherwise communication will fail. */
175         ret = ftdi_set_interface(devc->ftdic, INTERFACE_A);
176         if (ret < 0) {
177                 sr_err("Failed to set FTDI interface A (%d): %s", ret,
178                        ftdi_get_error_string(devc->ftdic));
179                 return SR_ERR;
180         }
181         sr_dbg("FTDI chip interface A set successfully.");
182
183         /* Open the device. */
184         ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
185                                  USB_IPRODUCT, NULL);
186         if (ret < 0) {
187                 sr_err("Failed to open device (%d): %s", ret,
188                        ftdi_get_error_string(devc->ftdic));
189                 return SR_ERR;
190         }
191         sr_dbg("FTDI device opened successfully.");
192
193         /* Purge RX/TX buffers in the FTDI chip. */
194         if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
195                 sr_err("Failed to purge FTDI RX/TX buffers (%d): %s.",
196                        ret, ftdi_get_error_string(devc->ftdic));
197                 goto err_dev_open_close_ftdic;
198         }
199         sr_dbg("FTDI chip buffers purged successfully.");
200
201         /* Reset the FTDI bitmode. */
202         ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_RESET);
203         if (ret < 0) {
204                 sr_err("Failed to reset the FTDI chip bitmode (%d): %s.",
205                        ret, ftdi_get_error_string(devc->ftdic));
206                 goto err_dev_open_close_ftdic;
207         }
208         sr_dbg("FTDI chip bitmode reset successfully.");
209
210         /* Set FTDI bitmode to "sync FIFO". */
211         ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_SYNCFF);
212         if (ret < 0) {
213                 sr_err("Failed to put FTDI chip into sync FIFO mode (%d): %s.",
214                        ret, ftdi_get_error_string(devc->ftdic));
215                 goto err_dev_open_close_ftdic;
216         }
217         sr_dbg("FTDI chip sync FIFO mode entered successfully.");
218
219         /* Set the FTDI latency timer to 2. */
220         ret = ftdi_set_latency_timer(devc->ftdic, 2);
221         if (ret < 0) {
222                 sr_err("Failed to set FTDI latency timer (%d): %s.",
223                        ret, ftdi_get_error_string(devc->ftdic));
224                 goto err_dev_open_close_ftdic;
225         }
226         sr_dbg("FTDI chip latency timer set successfully.");
227
228         /* Set the FTDI read data chunk size to 64kB. */
229         ret = ftdi_read_data_set_chunksize(devc->ftdic, 64 * 1024);
230         if (ret < 0) {
231                 sr_err("Failed to set FTDI read data chunk size (%d): %s.",
232                        ret, ftdi_get_error_string(devc->ftdic));
233                 goto err_dev_open_close_ftdic;
234         }
235         sr_dbg("FTDI chip read data chunk size set successfully.");
236
237         /* Get the ScanaPLUS device ID from the FTDI EEPROM. */
238         if ((ret = scanaplus_get_device_id(devc)) < 0) {
239                 sr_err("Failed to get ScanaPLUS device ID: %d.", ret);
240                 goto err_dev_open_close_ftdic;
241         }
242         sr_dbg("Received ScanaPLUS device ID successfully: %02x %02x %02x.",
243                devc->devid[0], devc->devid[1], devc->devid[2]);
244
245         sdi->status = SR_ST_ACTIVE;
246
247         return SR_OK;
248
249 err_dev_open_close_ftdic:
250         scanaplus_close(devc);
251         return SR_ERR;
252 }
253
254 static int dev_close(struct sr_dev_inst *sdi)
255 {
256         int ret;
257         struct dev_context *devc;
258
259         ret = SR_OK;
260         devc = sdi->priv;
261
262         if (sdi->status == SR_ST_ACTIVE) {
263                 sr_dbg("Status ACTIVE, closing device.");
264                 ret = scanaplus_close(devc);
265         } else {
266                 sr_spew("Status not ACTIVE, nothing to do.");
267         }
268
269         sdi->status = SR_ST_INACTIVE;
270
271         return ret;
272 }
273
274 static int cleanup(void)
275 {
276         return dev_clear();
277 }
278
279 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
280                 const struct sr_channel_group *cg)
281 {
282         (void)sdi;
283         (void)cg;
284
285         switch (key) {
286         case SR_CONF_SAMPLERATE:
287                 /* The ScanaPLUS samplerate is 100MHz and can't be changed. */
288                 *data = g_variant_new_uint64(SR_MHZ(100));
289                 break;
290         default:
291                 return SR_ERR_NA;
292         }
293
294         return SR_OK;
295 }
296
297 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
298                 const struct sr_channel_group *cg)
299 {
300         struct dev_context *devc;
301
302         (void)cg;
303
304         if (sdi->status != SR_ST_ACTIVE)
305                 return SR_ERR_DEV_CLOSED;
306
307         devc = sdi->priv;
308
309         switch (key) {
310         case SR_CONF_SAMPLERATE:
311                 if (g_variant_get_uint64(data) != SR_MHZ(100)) {
312                         sr_err("ScanaPLUS only supports samplerate = 100MHz.");
313                         return SR_ERR_ARG;
314                 }
315                 /* Nothing to do, the ScanaPLUS samplerate is always 100MHz. */
316                 break;
317         case SR_CONF_LIMIT_MSEC:
318                 if (g_variant_get_uint64(data) == 0)
319                         return SR_ERR_ARG;
320                 devc->limit_msec = g_variant_get_uint64(data);
321                 break;
322         case SR_CONF_LIMIT_SAMPLES:
323                 if (g_variant_get_uint64(data) == 0)
324                         return SR_ERR_ARG;
325                 devc->limit_samples = g_variant_get_uint64(data);
326                 break;
327         default:
328                 return SR_ERR_NA;
329         }
330
331         return SR_OK;
332 }
333
334 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
335                 const struct sr_channel_group *cg)
336 {
337         GVariant *gvar;
338         GVariantBuilder gvb;
339
340         (void)sdi;
341         (void)cg;
342
343         switch (key) {
344         case SR_CONF_DEVICE_OPTIONS:
345                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
346                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
347                 break;
348         case SR_CONF_SAMPLERATE:
349                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
350                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
351                                 samplerates, ARRAY_SIZE(samplerates),
352                                 sizeof(uint64_t));
353                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
354                 *data = g_variant_builder_end(&gvb);
355                 break;
356         default:
357                 return SR_ERR_NA;
358         }
359
360         return SR_OK;
361 }
362
363 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
364 {
365         int ret;
366         struct dev_context *devc;
367
368         if (sdi->status != SR_ST_ACTIVE)
369                 return SR_ERR_DEV_CLOSED;
370
371         if (!(devc = sdi->priv))
372                 return SR_ERR_BUG;
373
374         if (!devc->ftdic)
375                 return SR_ERR_BUG;
376
377         /* TODO: Configure channels later (thresholds etc.). */
378
379         devc->cb_data = cb_data;
380
381         /* Properly reset internal variables before every new acquisition. */
382         devc->compressed_bytes_ignored = 0;
383         devc->samples_sent = 0;
384         devc->bytes_received = 0;
385
386         if ((ret = scanaplus_init(devc)) < 0)
387                 return ret;
388
389         if ((ret = scanaplus_start_acquisition(devc)) < 0)
390                 return ret;
391
392         /* Send header packet to the session bus. */
393         std_session_send_df_header(sdi, LOG_PREFIX);
394
395         /* Hook up a dummy handler to receive data from the device. */
396         sr_session_source_add(sdi->session, -1, G_IO_IN, 0, scanaplus_receive_data, (void *)sdi);
397
398         return SR_OK;
399 }
400
401 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
402 {
403         struct sr_datafeed_packet packet;
404
405         (void)cb_data;
406
407         sr_dbg("Stopping acquisition.");
408         sr_session_source_remove(sdi->session, -1);
409
410         /* Send end packet to the session bus. */
411         sr_dbg("Sending SR_DF_END.");
412         packet.type = SR_DF_END;
413         sr_session_send(sdi, &packet);
414
415         return SR_OK;
416 }
417
418 SR_PRIV struct sr_dev_driver ikalogic_scanaplus_driver_info = {
419         .name = "ikalogic-scanaplus",
420         .longname = "IKALOGIC ScanaPLUS",
421         .api_version = 1,
422         .init = init,
423         .cleanup = cleanup,
424         .scan = scan,
425         .dev_list = dev_list,
426         .dev_clear = dev_clear,
427         .config_get = config_get,
428         .config_set = config_set,
429         .config_list = config_list,
430         .dev_open = dev_open,
431         .dev_close = dev_close,
432         .dev_acquisition_start = dev_acquisition_start,
433         .dev_acquisition_stop = dev_acquisition_stop,
434         .priv = NULL,
435 };