]> sigrok.org Git - libsigrok.git/blob - src/hardware/ikalogic-scanaplus/api.c
Change type of SR_CONF keys to uint32_t.
[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 hwcaps[] = {
32         SR_CONF_LOGIC_ANALYZER,
33         SR_CONF_SAMPLERATE,
34         SR_CONF_LIMIT_MSEC,
35         SR_CONF_LIMIT_SAMPLES,
36         SR_CONF_CONTINUOUS, // TODO?
37 };
38
39 /* Channels are numbered 1-9. */
40 static const char *channel_names[] = {
41         "1", "2", "3", "4", "5", "6", "7", "8", "9",
42         NULL,
43 };
44
45 /* Note: The IKALOGIC ScanaPLUS always samples at 100MHz. */
46 static uint64_t samplerates[1] = { SR_MHZ(100) };
47
48 SR_PRIV struct sr_dev_driver ikalogic_scanaplus_driver_info;
49 static struct sr_dev_driver *di = &ikalogic_scanaplus_driver_info;
50
51 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
52
53 static void clear_helper(void *priv)
54 {
55         struct dev_context *devc;
56
57         devc = priv;
58
59         ftdi_free(devc->ftdic);
60         g_free(devc->compressed_buf);
61         g_free(devc->sample_buf);
62         g_free(devc);
63 }
64
65 static int dev_clear(void)
66 {
67         return std_dev_clear(di, clear_helper);
68 }
69
70 static int init(struct sr_context *sr_ctx)
71 {
72         return std_init(sr_ctx, di, LOG_PREFIX);
73 }
74
75 static GSList *scan(GSList *options)
76 {
77         struct sr_dev_inst *sdi;
78         struct sr_channel *ch;
79         struct drv_context *drvc;
80         struct dev_context *devc;
81         GSList *devices;
82         unsigned int i;
83         int ret;
84
85         (void)options;
86
87         drvc = di->priv;
88
89         devices = NULL;
90
91         /* Allocate memory for our private device context. */
92         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
93                 sr_err("Device context malloc failed.");
94                 goto err_free_nothing;
95         }
96
97         /* Allocate memory for the incoming compressed samples. */
98         if (!(devc->compressed_buf = g_try_malloc0(COMPRESSED_BUF_SIZE))) {
99                 sr_err("compressed_buf malloc failed.");
100                 goto err_free_devc;
101         }
102
103         /* Allocate memory for the uncompressed samples. */
104         if (!(devc->sample_buf = g_try_malloc0(SAMPLE_BUF_SIZE))) {
105                 sr_err("sample_buf malloc failed.");
106                 goto err_free_compressed_buf;
107         }
108
109         /* Allocate memory for the FTDI context (ftdic) and initialize it. */
110         if (!(devc->ftdic = ftdi_new())) {
111                 sr_err("Failed to initialize libftdi.");
112                 goto err_free_sample_buf;
113         }
114
115         /* Check for the device and temporarily open it. */
116         ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
117                                  USB_IPRODUCT, NULL);
118         if (ret < 0) {
119                 /* Log errors, except for -3 ("device not found"). */
120                 if (ret != -3)
121                         sr_err("Failed to open device (%d): %s", ret,
122                                ftdi_get_error_string(devc->ftdic));
123                 goto err_free_ftdic;
124         }
125
126         /* Register the device with libsigrok. */
127         sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING,
128                         USB_VENDOR_NAME, USB_MODEL_NAME, NULL);
129         if (!sdi) {
130                 sr_err("Failed to create device instance.");
131                 goto err_close_ftdic;
132         }
133         sdi->driver = di;
134         sdi->priv = devc;
135
136         for (i = 0; channel_names[i]; i++) {
137                 if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
138                                            channel_names[i])))
139                         return NULL;
140                 sdi->channels = g_slist_append(sdi->channels, ch);
141         }
142
143         devices = g_slist_append(devices, sdi);
144         drvc->instances = g_slist_append(drvc->instances, sdi);
145
146         /* Close device. We'll reopen it again when we need it. */
147         scanaplus_close(devc);
148
149         return devices;
150
151 err_close_ftdic:
152         scanaplus_close(devc);
153 err_free_ftdic:
154         ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
155 err_free_sample_buf:
156         g_free(devc->sample_buf);
157 err_free_compressed_buf:
158         g_free(devc->compressed_buf);
159 err_free_devc:
160         g_free(devc);
161 err_free_nothing:
162
163         return NULL;
164 }
165
166 static GSList *dev_list(void)
167 {
168         return ((struct drv_context *)(di->priv))->instances;
169 }
170
171 static int dev_open(struct sr_dev_inst *sdi)
172 {
173         struct dev_context *devc;
174         int ret;
175
176         devc = sdi->priv;
177
178         /* Select interface A, otherwise communication will fail. */
179         ret = ftdi_set_interface(devc->ftdic, INTERFACE_A);
180         if (ret < 0) {
181                 sr_err("Failed to set FTDI interface A (%d): %s", ret,
182                        ftdi_get_error_string(devc->ftdic));
183                 return SR_ERR;
184         }
185         sr_dbg("FTDI chip interface A set successfully.");
186
187         /* Open the device. */
188         ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
189                                  USB_IPRODUCT, NULL);
190         if (ret < 0) {
191                 sr_err("Failed to open device (%d): %s", ret,
192                        ftdi_get_error_string(devc->ftdic));
193                 return SR_ERR;
194         }
195         sr_dbg("FTDI device opened successfully.");
196
197         /* Purge RX/TX buffers in the FTDI chip. */
198         if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
199                 sr_err("Failed to purge FTDI RX/TX buffers (%d): %s.",
200                        ret, ftdi_get_error_string(devc->ftdic));
201                 goto err_dev_open_close_ftdic;
202         }
203         sr_dbg("FTDI chip buffers purged successfully.");
204
205         /* Reset the FTDI bitmode. */
206         ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_RESET);
207         if (ret < 0) {
208                 sr_err("Failed to reset the FTDI chip bitmode (%d): %s.",
209                        ret, ftdi_get_error_string(devc->ftdic));
210                 goto err_dev_open_close_ftdic;
211         }
212         sr_dbg("FTDI chip bitmode reset successfully.");
213
214         /* Set FTDI bitmode to "sync FIFO". */
215         ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_SYNCFF);
216         if (ret < 0) {
217                 sr_err("Failed to put FTDI chip into sync FIFO mode (%d): %s.",
218                        ret, ftdi_get_error_string(devc->ftdic));
219                 goto err_dev_open_close_ftdic;
220         }
221         sr_dbg("FTDI chip sync FIFO mode entered successfully.");
222
223         /* Set the FTDI latency timer to 2. */
224         ret = ftdi_set_latency_timer(devc->ftdic, 2);
225         if (ret < 0) {
226                 sr_err("Failed to set FTDI latency timer (%d): %s.",
227                        ret, ftdi_get_error_string(devc->ftdic));
228                 goto err_dev_open_close_ftdic;
229         }
230         sr_dbg("FTDI chip latency timer set successfully.");
231
232         /* Set the FTDI read data chunk size to 64kB. */
233         ret = ftdi_read_data_set_chunksize(devc->ftdic, 64 * 1024);
234         if (ret < 0) {
235                 sr_err("Failed to set FTDI read data chunk size (%d): %s.",
236                        ret, ftdi_get_error_string(devc->ftdic));
237                 goto err_dev_open_close_ftdic;
238         }
239         sr_dbg("FTDI chip read data chunk size set successfully.");
240
241         /* Get the ScanaPLUS device ID from the FTDI EEPROM. */
242         if ((ret = scanaplus_get_device_id(devc)) < 0) {
243                 sr_err("Failed to get ScanaPLUS device ID: %d.", ret);
244                 goto err_dev_open_close_ftdic;
245         }
246         sr_dbg("Received ScanaPLUS device ID successfully: %02x %02x %02x.",
247                devc->devid[0], devc->devid[1], devc->devid[2]);
248
249         sdi->status = SR_ST_ACTIVE;
250
251         return SR_OK;
252
253 err_dev_open_close_ftdic:
254         scanaplus_close(devc);
255         return SR_ERR;
256 }
257
258 static int dev_close(struct sr_dev_inst *sdi)
259 {
260         int ret;
261         struct dev_context *devc;
262
263         ret = SR_OK;
264         devc = sdi->priv;
265
266         if (sdi->status == SR_ST_ACTIVE) {
267                 sr_dbg("Status ACTIVE, closing device.");
268                 ret = scanaplus_close(devc);
269         } else {
270                 sr_spew("Status not ACTIVE, nothing to do.");
271         }
272
273         sdi->status = SR_ST_INACTIVE;
274
275         return ret;
276 }
277
278 static int cleanup(void)
279 {
280         return dev_clear();
281 }
282
283 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
284                 const struct sr_channel_group *cg)
285 {
286         (void)sdi;
287         (void)cg;
288
289         switch (key) {
290         case SR_CONF_SAMPLERATE:
291                 /* The ScanaPLUS samplerate is 100MHz and can't be changed. */
292                 *data = g_variant_new_uint64(SR_MHZ(100));
293                 break;
294         default:
295                 return SR_ERR_NA;
296         }
297
298         return SR_OK;
299 }
300
301 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
302                 const struct sr_channel_group *cg)
303 {
304         struct dev_context *devc;
305
306         (void)cg;
307
308         if (sdi->status != SR_ST_ACTIVE)
309                 return SR_ERR_DEV_CLOSED;
310
311         devc = sdi->priv;
312
313         switch (key) {
314         case SR_CONF_SAMPLERATE:
315                 if (g_variant_get_uint64(data) != SR_MHZ(100)) {
316                         sr_err("ScanaPLUS only supports samplerate = 100MHz.");
317                         return SR_ERR_ARG;
318                 }
319                 /* Nothing to do, the ScanaPLUS samplerate is always 100MHz. */
320                 break;
321         case SR_CONF_LIMIT_MSEC:
322                 if (g_variant_get_uint64(data) == 0)
323                         return SR_ERR_ARG;
324                 devc->limit_msec = g_variant_get_uint64(data);
325                 break;
326         case SR_CONF_LIMIT_SAMPLES:
327                 if (g_variant_get_uint64(data) == 0)
328                         return SR_ERR_ARG;
329                 devc->limit_samples = g_variant_get_uint64(data);
330                 break;
331         default:
332                 return SR_ERR_NA;
333         }
334
335         return SR_OK;
336 }
337
338 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
339                 const struct sr_channel_group *cg)
340 {
341         GVariant *gvar;
342         GVariantBuilder gvb;
343
344         (void)sdi;
345         (void)cg;
346
347         switch (key) {
348         case SR_CONF_DEVICE_OPTIONS:
349                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
350                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(uint32_t));
351                 break;
352         case SR_CONF_SAMPLERATE:
353                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
354                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
355                                 samplerates, ARRAY_SIZE(samplerates),
356                                 sizeof(uint64_t));
357                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
358                 *data = g_variant_builder_end(&gvb);
359                 break;
360         default:
361                 return SR_ERR_NA;
362         }
363
364         return SR_OK;
365 }
366
367 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
368 {
369         int ret;
370         struct dev_context *devc;
371
372         if (sdi->status != SR_ST_ACTIVE)
373                 return SR_ERR_DEV_CLOSED;
374
375         if (!(devc = sdi->priv))
376                 return SR_ERR_BUG;
377
378         if (!devc->ftdic)
379                 return SR_ERR_BUG;
380
381         /* TODO: Configure channels later (thresholds etc.). */
382
383         devc->cb_data = cb_data;
384
385         /* Properly reset internal variables before every new acquisition. */
386         devc->compressed_bytes_ignored = 0;
387         devc->samples_sent = 0;
388         devc->bytes_received = 0;
389
390         if ((ret = scanaplus_init(devc)) < 0)
391                 return ret;
392
393         if ((ret = scanaplus_start_acquisition(devc)) < 0)
394                 return ret;
395
396         /* Send header packet to the session bus. */
397         std_session_send_df_header(sdi, LOG_PREFIX);
398
399         /* Hook up a dummy handler to receive data from the device. */
400         sr_session_source_add(sdi->session, -1, G_IO_IN, 0, scanaplus_receive_data, (void *)sdi);
401
402         return SR_OK;
403 }
404
405 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
406 {
407         struct sr_datafeed_packet packet;
408
409         (void)cb_data;
410
411         sr_dbg("Stopping acquisition.");
412         sr_session_source_remove(sdi->session, -1);
413
414         /* Send end packet to the session bus. */
415         sr_dbg("Sending SR_DF_END.");
416         packet.type = SR_DF_END;
417         sr_session_send(sdi, &packet);
418
419         return SR_OK;
420 }
421
422 SR_PRIV struct sr_dev_driver ikalogic_scanaplus_driver_info = {
423         .name = "ikalogic-scanaplus",
424         .longname = "IKALOGIC ScanaPLUS",
425         .api_version = 1,
426         .init = init,
427         .cleanup = cleanup,
428         .scan = scan,
429         .dev_list = dev_list,
430         .dev_clear = dev_clear,
431         .config_get = config_get,
432         .config_set = config_set,
433         .config_list = config_list,
434         .dev_open = dev_open,
435         .dev_close = dev_close,
436         .dev_acquisition_start = dev_acquisition_start,
437         .dev_acquisition_stop = dev_acquisition_stop,
438         .priv = NULL,
439 };