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Consistently use g_malloc0() for allocating devc.
[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         devc = g_malloc0(sizeof(struct dev_context));
92
93         /* Allocate memory for the incoming compressed samples. */
94         if (!(devc->compressed_buf = g_try_malloc0(COMPRESSED_BUF_SIZE))) {
95                 sr_err("compressed_buf malloc failed.");
96                 goto err_free_devc;
97         }
98
99         /* Allocate memory for the uncompressed samples. */
100         if (!(devc->sample_buf = g_try_malloc0(SAMPLE_BUF_SIZE))) {
101                 sr_err("sample_buf malloc failed.");
102                 goto err_free_compressed_buf;
103         }
104
105         /* Allocate memory for the FTDI context (ftdic) and initialize it. */
106         if (!(devc->ftdic = ftdi_new())) {
107                 sr_err("Failed to initialize libftdi.");
108                 goto err_free_sample_buf;
109         }
110
111         /* Check for the device and temporarily open it. */
112         ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
113                                  USB_IPRODUCT, NULL);
114         if (ret < 0) {
115                 /* Log errors, except for -3 ("device not found"). */
116                 if (ret != -3)
117                         sr_err("Failed to open device (%d): %s", ret,
118                                ftdi_get_error_string(devc->ftdic));
119                 goto err_free_ftdic;
120         }
121
122         /* Register the device with libsigrok. */
123         sdi = g_malloc0(sizeof(struct sr_dev_inst));
124         sdi->status = SR_ST_INITIALIZING;
125         sdi->vendor = g_strdup(USB_VENDOR_NAME);
126         sdi->model = g_strdup(USB_MODEL_NAME);
127         sdi->driver = di;
128         sdi->priv = devc;
129
130         for (i = 0; channel_names[i]; i++) {
131                 if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
132                                            channel_names[i])))
133                         return NULL;
134                 sdi->channels = g_slist_append(sdi->channels, ch);
135         }
136
137         devices = g_slist_append(devices, sdi);
138         drvc->instances = g_slist_append(drvc->instances, sdi);
139
140         /* Close device. We'll reopen it again when we need it. */
141         scanaplus_close(devc);
142
143         return devices;
144
145         scanaplus_close(devc);
146 err_free_ftdic:
147         ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
148 err_free_sample_buf:
149         g_free(devc->sample_buf);
150 err_free_compressed_buf:
151         g_free(devc->compressed_buf);
152 err_free_devc:
153         g_free(devc);
154
155         return NULL;
156 }
157
158 static GSList *dev_list(void)
159 {
160         return ((struct drv_context *)(di->priv))->instances;
161 }
162
163 static int dev_open(struct sr_dev_inst *sdi)
164 {
165         struct dev_context *devc;
166         int ret;
167
168         devc = sdi->priv;
169
170         /* Select interface A, otherwise communication will fail. */
171         ret = ftdi_set_interface(devc->ftdic, INTERFACE_A);
172         if (ret < 0) {
173                 sr_err("Failed to set FTDI interface A (%d): %s", ret,
174                        ftdi_get_error_string(devc->ftdic));
175                 return SR_ERR;
176         }
177         sr_dbg("FTDI chip interface A set successfully.");
178
179         /* Open the device. */
180         ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
181                                  USB_IPRODUCT, NULL);
182         if (ret < 0) {
183                 sr_err("Failed to open device (%d): %s", ret,
184                        ftdi_get_error_string(devc->ftdic));
185                 return SR_ERR;
186         }
187         sr_dbg("FTDI device opened successfully.");
188
189         /* Purge RX/TX buffers in the FTDI chip. */
190         if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
191                 sr_err("Failed to purge FTDI RX/TX buffers (%d): %s.",
192                        ret, ftdi_get_error_string(devc->ftdic));
193                 goto err_dev_open_close_ftdic;
194         }
195         sr_dbg("FTDI chip buffers purged successfully.");
196
197         /* Reset the FTDI bitmode. */
198         ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_RESET);
199         if (ret < 0) {
200                 sr_err("Failed to reset the FTDI chip bitmode (%d): %s.",
201                        ret, ftdi_get_error_string(devc->ftdic));
202                 goto err_dev_open_close_ftdic;
203         }
204         sr_dbg("FTDI chip bitmode reset successfully.");
205
206         /* Set FTDI bitmode to "sync FIFO". */
207         ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_SYNCFF);
208         if (ret < 0) {
209                 sr_err("Failed to put FTDI chip into sync FIFO mode (%d): %s.",
210                        ret, ftdi_get_error_string(devc->ftdic));
211                 goto err_dev_open_close_ftdic;
212         }
213         sr_dbg("FTDI chip sync FIFO mode entered successfully.");
214
215         /* Set the FTDI latency timer to 2. */
216         ret = ftdi_set_latency_timer(devc->ftdic, 2);
217         if (ret < 0) {
218                 sr_err("Failed to set FTDI latency timer (%d): %s.",
219                        ret, ftdi_get_error_string(devc->ftdic));
220                 goto err_dev_open_close_ftdic;
221         }
222         sr_dbg("FTDI chip latency timer set successfully.");
223
224         /* Set the FTDI read data chunk size to 64kB. */
225         ret = ftdi_read_data_set_chunksize(devc->ftdic, 64 * 1024);
226         if (ret < 0) {
227                 sr_err("Failed to set FTDI read data chunk size (%d): %s.",
228                        ret, ftdi_get_error_string(devc->ftdic));
229                 goto err_dev_open_close_ftdic;
230         }
231         sr_dbg("FTDI chip read data chunk size set successfully.");
232
233         /* Get the ScanaPLUS device ID from the FTDI EEPROM. */
234         if ((ret = scanaplus_get_device_id(devc)) < 0) {
235                 sr_err("Failed to get ScanaPLUS device ID: %d.", ret);
236                 goto err_dev_open_close_ftdic;
237         }
238         sr_dbg("Received ScanaPLUS device ID successfully: %02x %02x %02x.",
239                devc->devid[0], devc->devid[1], devc->devid[2]);
240
241         sdi->status = SR_ST_ACTIVE;
242
243         return SR_OK;
244
245 err_dev_open_close_ftdic:
246         scanaplus_close(devc);
247         return SR_ERR;
248 }
249
250 static int dev_close(struct sr_dev_inst *sdi)
251 {
252         int ret;
253         struct dev_context *devc;
254
255         ret = SR_OK;
256         devc = sdi->priv;
257
258         if (sdi->status == SR_ST_ACTIVE) {
259                 sr_dbg("Status ACTIVE, closing device.");
260                 ret = scanaplus_close(devc);
261         } else {
262                 sr_spew("Status not ACTIVE, nothing to do.");
263         }
264
265         sdi->status = SR_ST_INACTIVE;
266
267         return ret;
268 }
269
270 static int cleanup(void)
271 {
272         return dev_clear();
273 }
274
275 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
276                 const struct sr_channel_group *cg)
277 {
278         (void)sdi;
279         (void)cg;
280
281         switch (key) {
282         case SR_CONF_SAMPLERATE:
283                 /* The ScanaPLUS samplerate is 100MHz and can't be changed. */
284                 *data = g_variant_new_uint64(SR_MHZ(100));
285                 break;
286         default:
287                 return SR_ERR_NA;
288         }
289
290         return SR_OK;
291 }
292
293 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
294                 const struct sr_channel_group *cg)
295 {
296         struct dev_context *devc;
297
298         (void)cg;
299
300         if (sdi->status != SR_ST_ACTIVE)
301                 return SR_ERR_DEV_CLOSED;
302
303         devc = sdi->priv;
304
305         switch (key) {
306         case SR_CONF_SAMPLERATE:
307                 if (g_variant_get_uint64(data) != SR_MHZ(100)) {
308                         sr_err("ScanaPLUS only supports samplerate = 100MHz.");
309                         return SR_ERR_ARG;
310                 }
311                 /* Nothing to do, the ScanaPLUS samplerate is always 100MHz. */
312                 break;
313         case SR_CONF_LIMIT_MSEC:
314                 if (g_variant_get_uint64(data) == 0)
315                         return SR_ERR_ARG;
316                 devc->limit_msec = g_variant_get_uint64(data);
317                 break;
318         case SR_CONF_LIMIT_SAMPLES:
319                 if (g_variant_get_uint64(data) == 0)
320                         return SR_ERR_ARG;
321                 devc->limit_samples = g_variant_get_uint64(data);
322                 break;
323         default:
324                 return SR_ERR_NA;
325         }
326
327         return SR_OK;
328 }
329
330 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
331                 const struct sr_channel_group *cg)
332 {
333         GVariant *gvar;
334         GVariantBuilder gvb;
335
336         (void)sdi;
337         (void)cg;
338
339         switch (key) {
340         case SR_CONF_DEVICE_OPTIONS:
341                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
342                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
343                 break;
344         case SR_CONF_SAMPLERATE:
345                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
346                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
347                                 samplerates, ARRAY_SIZE(samplerates),
348                                 sizeof(uint64_t));
349                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
350                 *data = g_variant_builder_end(&gvb);
351                 break;
352         default:
353                 return SR_ERR_NA;
354         }
355
356         return SR_OK;
357 }
358
359 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
360 {
361         int ret;
362         struct dev_context *devc;
363
364         if (sdi->status != SR_ST_ACTIVE)
365                 return SR_ERR_DEV_CLOSED;
366
367         if (!(devc = sdi->priv))
368                 return SR_ERR_BUG;
369
370         if (!devc->ftdic)
371                 return SR_ERR_BUG;
372
373         /* TODO: Configure channels later (thresholds etc.). */
374
375         devc->cb_data = cb_data;
376
377         /* Properly reset internal variables before every new acquisition. */
378         devc->compressed_bytes_ignored = 0;
379         devc->samples_sent = 0;
380         devc->bytes_received = 0;
381
382         if ((ret = scanaplus_init(devc)) < 0)
383                 return ret;
384
385         if ((ret = scanaplus_start_acquisition(devc)) < 0)
386                 return ret;
387
388         /* Send header packet to the session bus. */
389         std_session_send_df_header(sdi, LOG_PREFIX);
390
391         /* Hook up a dummy handler to receive data from the device. */
392         sr_session_source_add(sdi->session, -1, G_IO_IN, 0, scanaplus_receive_data, (void *)sdi);
393
394         return SR_OK;
395 }
396
397 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
398 {
399         struct sr_datafeed_packet packet;
400
401         (void)cb_data;
402
403         sr_dbg("Stopping acquisition.");
404         sr_session_source_remove(sdi->session, -1);
405
406         /* Send end packet to the session bus. */
407         sr_dbg("Sending SR_DF_END.");
408         packet.type = SR_DF_END;
409         sr_session_send(sdi, &packet);
410
411         return SR_OK;
412 }
413
414 SR_PRIV struct sr_dev_driver ikalogic_scanaplus_driver_info = {
415         .name = "ikalogic-scanaplus",
416         .longname = "IKALOGIC ScanaPLUS",
417         .api_version = 1,
418         .init = init,
419         .cleanup = cleanup,
420         .scan = scan,
421         .dev_list = dev_list,
422         .dev_clear = dev_clear,
423         .config_get = config_get,
424         .config_set = config_set,
425         .config_list = config_list,
426         .dev_open = dev_open,
427         .dev_close = dev_close,
428         .dev_acquisition_start = dev_acquisition_start,
429         .dev_acquisition_stop = dev_acquisition_stop,
430         .priv = NULL,
431 };