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Commit | Line | Data |
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6ed4f044 DR |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2011 Daniel Ribeiro <drwyrm@gmail.com> | |
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 | ||
a4cfb10f UH |
21 | /* Note: This driver doesn't compile, analog support in sigrok is WIP. */ |
22 | ||
6ed4f044 DR |
23 | #include <stdlib.h> |
24 | #include <unistd.h> | |
25 | #include <string.h> | |
6ed4f044 | 26 | #include <alsa/asoundlib.h> |
b7f09cf8 UH |
27 | #include "sigrok.h" |
28 | #include "sigrok-internal.h" | |
6ed4f044 DR |
29 | |
30 | #define NUM_PROBES 2 | |
31 | #define SAMPLE_WIDTH 16 | |
32 | #define AUDIO_DEV "plughw:0,0" | |
33 | ||
a4cfb10f UH |
34 | struct sr_analog_probe { |
35 | uint8_t att; | |
36 | uint8_t res; /* Needs to be a power of 2, FIXME */ | |
37 | uint16_t val; /* Max hardware ADC width is 16bits */ | |
38 | }; | |
39 | ||
40 | struct sr_analog_sample { | |
41 | uint8_t num_probes; /* Max hardware probes is 256 */ | |
42 | struct sr_analog_probe probes[]; | |
43 | }; | |
44 | ||
6ed4f044 | 45 | static int capabilities[] = { |
5a2326a7 UH |
46 | SR_HWCAP_SAMPLERATE, |
47 | SR_HWCAP_LIMIT_SAMPLES, | |
48 | SR_HWCAP_CONTINUOUS, | |
6ed4f044 DR |
49 | }; |
50 | ||
c37d2b1b | 51 | static const char *probe_names[NUM_PROBES + 1] = { |
464d12c7 KS |
52 | "0", |
53 | "1", | |
54 | NULL, | |
55 | }; | |
56 | ||
6ed4f044 DR |
57 | static GSList *device_instances = NULL; |
58 | ||
59 | struct alsa { | |
60 | uint64_t cur_rate; | |
61 | uint64_t limit_samples; | |
62 | snd_pcm_t *capture_handle; | |
63 | snd_pcm_hw_params_t *hw_params; | |
64 | gpointer session_id; | |
65 | }; | |
66 | ||
54ac5277 | 67 | static int hw_init(const char *deviceinfo) |
6ed4f044 | 68 | { |
a00ba012 | 69 | struct sr_device_instance *sdi; |
6ed4f044 DR |
70 | struct alsa *alsa; |
71 | ||
72 | /* Avoid compiler warnings. */ | |
73 | deviceinfo = deviceinfo; | |
74 | ||
92b3101c UH |
75 | if (!(alsa = g_try_malloc0(sizeof(struct alsa)))) { |
76 | sr_err("alsa: %s: alsa malloc failed", __func__); | |
6ed4f044 | 77 | return 0; |
92b3101c | 78 | } |
6ed4f044 | 79 | |
5a2326a7 | 80 | sdi = sr_device_instance_new(0, SR_ST_ACTIVE, "alsa", NULL, NULL); |
6ed4f044 DR |
81 | if (!sdi) |
82 | goto free_alsa; | |
83 | ||
84 | sdi->priv = alsa; | |
85 | ||
86 | device_instances = g_slist_append(device_instances, sdi); | |
87 | ||
88 | return 1; | |
89 | free_alsa: | |
92b3101c | 90 | g_free(alsa); |
6ed4f044 DR |
91 | return 0; |
92 | } | |
93 | ||
94 | static int hw_opendev(int device_index) | |
95 | { | |
a00ba012 | 96 | struct sr_device_instance *sdi; |
6ed4f044 DR |
97 | struct alsa *alsa; |
98 | int err; | |
99 | ||
d32d961d | 100 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) |
e46b8fb1 | 101 | return SR_ERR; |
6ed4f044 DR |
102 | alsa = sdi->priv; |
103 | ||
104 | err = snd_pcm_open(&alsa->capture_handle, AUDIO_DEV, | |
105 | SND_PCM_STREAM_CAPTURE, 0); | |
106 | if (err < 0) { | |
133a37bf UH |
107 | sr_err("cannot open audio device %s (%s)", AUDIO_DEV, |
108 | snd_strerror(err)); | |
e46b8fb1 | 109 | return SR_ERR; |
6ed4f044 DR |
110 | } |
111 | ||
112 | err = snd_pcm_hw_params_malloc(&alsa->hw_params); | |
113 | if (err < 0) { | |
133a37bf UH |
114 | sr_err("cannot allocate hardware parameter structure (%s)", |
115 | snd_strerror(err)); | |
e46b8fb1 | 116 | return SR_ERR; |
6ed4f044 DR |
117 | } |
118 | ||
119 | err = snd_pcm_hw_params_any(alsa->capture_handle, alsa->hw_params); | |
120 | if (err < 0) { | |
133a37bf UH |
121 | sr_err("cannot initialize hardware parameter structure (%s)", |
122 | snd_strerror(err)); | |
e46b8fb1 | 123 | return SR_ERR; |
6ed4f044 DR |
124 | } |
125 | ||
e46b8fb1 | 126 | return SR_OK; |
6ed4f044 DR |
127 | } |
128 | ||
697785d1 | 129 | static int hw_closedev(int device_index) |
6ed4f044 | 130 | { |
a00ba012 | 131 | struct sr_device_instance *sdi; |
6ed4f044 DR |
132 | struct alsa *alsa; |
133 | ||
697785d1 UH |
134 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) { |
135 | sr_err("alsa: %s: sdi was NULL", __func__); | |
136 | return SR_ERR; /* TODO: SR_ERR_ARG? */ | |
137 | } | |
6ed4f044 | 138 | |
697785d1 UH |
139 | if (!(alsa = sdi->priv)) { |
140 | sr_err("alsa: %s: sdi->priv was NULL", __func__); | |
141 | return SR_ERR; /* TODO: SR_ERR_ARG? */ | |
142 | } | |
143 | ||
144 | // TODO: Return values of snd_*? | |
6ed4f044 DR |
145 | if (alsa->hw_params) |
146 | snd_pcm_hw_params_free(alsa->hw_params); | |
147 | if (alsa->capture_handle) | |
148 | snd_pcm_close(alsa->capture_handle); | |
697785d1 UH |
149 | |
150 | return SR_OK; | |
6ed4f044 DR |
151 | } |
152 | ||
153 | static void hw_cleanup(void) | |
154 | { | |
a00ba012 | 155 | struct sr_device_instance *sdi; |
6ed4f044 | 156 | |
d32d961d | 157 | if (!(sdi = sr_get_device_instance(device_instances, 0))) |
6ed4f044 DR |
158 | return; |
159 | ||
133a37bf | 160 | g_free(sdi->priv); |
a00ba012 | 161 | sr_device_instance_free(sdi); |
6ed4f044 DR |
162 | } |
163 | ||
164 | static void *hw_get_device_info(int device_index, int device_info_id) | |
165 | { | |
a00ba012 | 166 | struct sr_device_instance *sdi; |
6ed4f044 DR |
167 | struct alsa *alsa; |
168 | void *info = NULL; | |
169 | ||
d32d961d | 170 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) |
6ed4f044 DR |
171 | return NULL; |
172 | alsa = sdi->priv; | |
173 | ||
174 | switch (device_info_id) { | |
5a2326a7 | 175 | case SR_DI_INSTANCE: |
6ed4f044 DR |
176 | info = sdi; |
177 | break; | |
5a2326a7 | 178 | case SR_DI_NUM_PROBES: |
6ed4f044 DR |
179 | info = GINT_TO_POINTER(NUM_PROBES); |
180 | break; | |
464d12c7 KS |
181 | case SR_DI_PROBE_NAMES: |
182 | info = probe_names; | |
183 | break; | |
5a2326a7 | 184 | case SR_DI_CUR_SAMPLERATE: |
6ed4f044 DR |
185 | info = &alsa->cur_rate; |
186 | break; | |
5a2326a7 UH |
187 | // case SR_DI_PROBE_TYPE: |
188 | // info = GINT_TO_POINTER(SR_PROBE_TYPE_ANALOG); | |
da692373 | 189 | // break; |
6ed4f044 DR |
190 | } |
191 | ||
192 | return info; | |
193 | } | |
194 | ||
195 | static int hw_get_status(int device_index) | |
196 | { | |
197 | /* Avoid compiler warnings. */ | |
198 | device_index = device_index; | |
199 | ||
5a2326a7 | 200 | return SR_ST_ACTIVE; |
6ed4f044 DR |
201 | } |
202 | ||
203 | static int *hw_get_capabilities(void) | |
204 | { | |
205 | return capabilities; | |
206 | } | |
207 | ||
208 | static int hw_set_configuration(int device_index, int capability, void *value) | |
209 | { | |
a00ba012 | 210 | struct sr_device_instance *sdi; |
6ed4f044 DR |
211 | struct alsa *alsa; |
212 | ||
d32d961d | 213 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) |
e46b8fb1 | 214 | return SR_ERR; |
6ed4f044 DR |
215 | alsa = sdi->priv; |
216 | ||
217 | switch (capability) { | |
5a2326a7 | 218 | case SR_HWCAP_PROBECONFIG: |
e46b8fb1 | 219 | return SR_OK; |
5a2326a7 | 220 | case SR_HWCAP_SAMPLERATE: |
6ed4f044 | 221 | alsa->cur_rate = *(uint64_t *) value; |
e46b8fb1 | 222 | return SR_OK; |
5a2326a7 | 223 | case SR_HWCAP_LIMIT_SAMPLES: |
6ed4f044 | 224 | alsa->limit_samples = *(uint64_t *) value; |
e46b8fb1 | 225 | return SR_OK; |
6ed4f044 | 226 | default: |
e46b8fb1 | 227 | return SR_ERR; |
6ed4f044 DR |
228 | } |
229 | } | |
230 | ||
6ed4f044 DR |
231 | static int receive_data(int fd, int revents, void *user_data) |
232 | { | |
a00ba012 | 233 | struct sr_device_instance *sdi = user_data; |
6ed4f044 | 234 | struct alsa *alsa = sdi->priv; |
b9c735a2 | 235 | struct sr_datafeed_packet packet; |
809c5f20 UH |
236 | struct sr_analog_sample *sample; |
237 | unsigned int sample_size = sizeof(struct sr_analog_sample) + | |
238 | (NUM_PROBES * sizeof(struct sr_analog_probe)); | |
58330ab8 DR |
239 | char *outb; |
240 | char inb[4096]; | |
241 | int i, x, count; | |
242 | ||
cdbc51d9 DR |
243 | fd = fd; |
244 | revents = revents; | |
245 | ||
58330ab8 DR |
246 | do { |
247 | memset(inb, 0, sizeof(inb)); | |
248 | count = snd_pcm_readi(alsa->capture_handle, inb, | |
249 | MIN(4096/4, alsa->limit_samples)); | |
250 | if (count < 1) { | |
133a37bf | 251 | sr_err("Failed to read samples"); |
58330ab8 DR |
252 | return FALSE; |
253 | } | |
6ed4f044 | 254 | |
92b3101c UH |
255 | if (!(outb = g_try_malloc(sample_size * count))) { |
256 | sr_err("alsa: %s: outb malloc failed", __func__); | |
6ed4f044 | 257 | return FALSE; |
92b3101c | 258 | } |
58330ab8 DR |
259 | |
260 | for (i = 0; i < count; i++) { | |
809c5f20 | 261 | sample = (struct sr_analog_sample *) |
58330ab8 DR |
262 | (outb + (i * sample_size)); |
263 | sample->num_probes = NUM_PROBES; | |
264 | ||
265 | for (x = 0; x < NUM_PROBES; x++) { | |
266 | sample->probes[x].val = | |
267 | *(uint16_t *) (inb + (i * 4) + (x * 2)); | |
268 | sample->probes[x].val &= ((1 << 16) - 1); | |
269 | sample->probes[x].res = 16; | |
270 | } | |
6ed4f044 | 271 | } |
58330ab8 | 272 | |
5a2326a7 | 273 | packet.type = SR_DF_ANALOG; |
58330ab8 DR |
274 | packet.length = count * sample_size; |
275 | packet.unitsize = sample_size; | |
276 | packet.payload = outb; | |
8a2efef2 | 277 | sr_session_bus(user_data, &packet); |
92b3101c | 278 | g_free(outb); |
58330ab8 DR |
279 | alsa->limit_samples -= count; |
280 | ||
281 | } while (alsa->limit_samples > 0); | |
282 | ||
5a2326a7 | 283 | packet.type = SR_DF_END; |
8a2efef2 | 284 | sr_session_bus(user_data, &packet); |
6ed4f044 DR |
285 | |
286 | return TRUE; | |
287 | } | |
288 | ||
289 | static int hw_start_acquisition(int device_index, gpointer session_device_id) | |
290 | { | |
a00ba012 | 291 | struct sr_device_instance *sdi; |
6ed4f044 | 292 | struct alsa *alsa; |
b9c735a2 UH |
293 | struct sr_datafeed_packet packet; |
294 | struct sr_datafeed_header header; | |
6ed4f044 DR |
295 | struct pollfd *ufds; |
296 | int count; | |
297 | int err; | |
298 | ||
d32d961d | 299 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) |
e46b8fb1 | 300 | return SR_ERR; |
6ed4f044 DR |
301 | alsa = sdi->priv; |
302 | ||
303 | err = snd_pcm_hw_params_set_access(alsa->capture_handle, | |
304 | alsa->hw_params, SND_PCM_ACCESS_RW_INTERLEAVED); | |
305 | if (err < 0) { | |
133a37bf | 306 | sr_err("cannot set access type (%s)", snd_strerror(err)); |
e46b8fb1 | 307 | return SR_ERR; |
6ed4f044 DR |
308 | } |
309 | ||
310 | /* FIXME: Hardcoded for 16bits */ | |
311 | err = snd_pcm_hw_params_set_format(alsa->capture_handle, | |
312 | alsa->hw_params, SND_PCM_FORMAT_S16_LE); | |
313 | if (err < 0) { | |
133a37bf | 314 | sr_err("cannot set sample format (%s)", snd_strerror(err)); |
e46b8fb1 | 315 | return SR_ERR; |
6ed4f044 DR |
316 | } |
317 | ||
318 | err = snd_pcm_hw_params_set_rate_near(alsa->capture_handle, | |
319 | alsa->hw_params, (unsigned int *) &alsa->cur_rate, 0); | |
320 | if (err < 0) { | |
133a37bf | 321 | sr_err("cannot set sample rate (%s)", snd_strerror(err)); |
e46b8fb1 | 322 | return SR_ERR; |
6ed4f044 DR |
323 | } |
324 | ||
325 | err = snd_pcm_hw_params_set_channels(alsa->capture_handle, | |
326 | alsa->hw_params, NUM_PROBES); | |
327 | if (err < 0) { | |
133a37bf | 328 | sr_err("cannot set channel count (%s)", snd_strerror(err)); |
e46b8fb1 | 329 | return SR_ERR; |
6ed4f044 DR |
330 | } |
331 | ||
332 | err = snd_pcm_hw_params(alsa->capture_handle, alsa->hw_params); | |
333 | if (err < 0) { | |
133a37bf | 334 | sr_err("cannot set parameters (%s)", snd_strerror(err)); |
e46b8fb1 | 335 | return SR_ERR; |
6ed4f044 DR |
336 | } |
337 | ||
338 | err = snd_pcm_prepare(alsa->capture_handle); | |
339 | if (err < 0) { | |
133a37bf UH |
340 | sr_err("cannot prepare audio interface for use (%s)", |
341 | snd_strerror(err)); | |
e46b8fb1 | 342 | return SR_ERR; |
6ed4f044 DR |
343 | } |
344 | ||
345 | count = snd_pcm_poll_descriptors_count(alsa->capture_handle); | |
346 | if (count < 1) { | |
133a37bf | 347 | sr_err("Unable to obtain poll descriptors count"); |
e46b8fb1 | 348 | return SR_ERR; |
6ed4f044 DR |
349 | } |
350 | ||
92b3101c | 351 | if (!(ufds = g_try_malloc(count * sizeof(struct pollfd)))) { |
133a37bf | 352 | sr_err("alsa: %s: ufds malloc failed", __func__); |
e46b8fb1 | 353 | return SR_ERR_MALLOC; |
92b3101c | 354 | } |
6ed4f044 DR |
355 | |
356 | err = snd_pcm_poll_descriptors(alsa->capture_handle, ufds, count); | |
357 | if (err < 0) { | |
133a37bf UH |
358 | sr_err("Unable to obtain poll descriptors (%s)", |
359 | snd_strerror(err)); | |
92b3101c | 360 | g_free(ufds); |
e46b8fb1 | 361 | return SR_ERR; |
6ed4f044 DR |
362 | } |
363 | ||
364 | alsa->session_id = session_device_id; | |
6f1be0a2 | 365 | sr_source_add(ufds[0].fd, ufds[0].events, 10, receive_data, sdi); |
6ed4f044 | 366 | |
5a2326a7 | 367 | packet.type = SR_DF_HEADER; |
b9c735a2 | 368 | packet.length = sizeof(struct sr_datafeed_header); |
6ed4f044 DR |
369 | packet.payload = (unsigned char *) &header; |
370 | header.feed_version = 1; | |
371 | gettimeofday(&header.starttime, NULL); | |
372 | header.samplerate = alsa->cur_rate; | |
373 | header.num_analog_probes = NUM_PROBES; | |
374 | header.num_logic_probes = 0; | |
5a2326a7 | 375 | header.protocol_id = SR_PROTO_RAW; |
8a2efef2 | 376 | sr_session_bus(session_device_id, &packet); |
92b3101c | 377 | g_free(ufds); |
6ed4f044 | 378 | |
e46b8fb1 | 379 | return SR_OK; |
6ed4f044 DR |
380 | } |
381 | ||
3010f21c | 382 | static int hw_stop_acquisition(int device_index, gpointer session_device_id) |
6ed4f044 DR |
383 | { |
384 | /* Avoid compiler warnings. */ | |
385 | device_index = device_index; | |
386 | session_device_id = session_device_id; | |
3010f21c UH |
387 | |
388 | return SR_OK; | |
6ed4f044 DR |
389 | } |
390 | ||
ca070ed9 | 391 | SR_PRIV struct sr_device_plugin alsa_plugin_info = { |
e519ba86 UH |
392 | .name = "alsa", |
393 | .longname = "ALSA driver", | |
394 | .api_version = 1, | |
395 | .init = hw_init, | |
396 | .cleanup = hw_cleanup, | |
86f5e3d8 UH |
397 | .opendev = hw_opendev, |
398 | .closedev = hw_closedev, | |
e519ba86 UH |
399 | .get_device_info = hw_get_device_info, |
400 | .get_status = hw_get_status, | |
401 | .get_capabilities = hw_get_capabilities, | |
402 | .set_configuration = hw_set_configuration, | |
403 | .start_acquisition = hw_start_acquisition, | |
404 | .stop_acquisition = hw_stop_acquisition, | |
6ed4f044 | 405 | }; |