2 * This file is part of the libsigrok project.
4 * Copyright (C) 2014 Kumar Abhishek <abhishek@theembeddedkitchen.net>
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 3 of the License, or
9 * (at your option) any later version.
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.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "beaglelogic.h"
24 static const uint32_t scanopts[] = {
25 SR_CONF_NUM_LOGIC_CHANNELS,
28 static const uint32_t drvopts[] = {
29 SR_CONF_LOGIC_ANALYZER,
32 static const uint32_t devopts[] = {
34 SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
35 SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET,
36 SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
37 SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
38 SR_CONF_NUM_LOGIC_CHANNELS | SR_CONF_GET,
41 static const int32_t trigger_matches[] = {
49 SR_PRIV const char *channel_names[] = {
50 "P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39",
51 "P8_40", "P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20",
54 /* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */
55 static const uint64_t samplerates[] = {
61 static struct dev_context *beaglelogic_devc_alloc(void)
63 struct dev_context *devc;
65 devc = g_malloc0(sizeof(struct dev_context));
67 /* Default non-zero values (if any) */
69 devc->limit_samples = (uint64_t)-1;
74 static GSList *scan(struct sr_dev_driver *di, GSList *options)
77 struct sr_config *src;
78 struct sr_dev_inst *sdi;
79 struct dev_context *devc;
82 /* Probe for /dev/beaglelogic */
83 if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
87 for (l = options; l; l = l->next) {
89 if (src->key == SR_CONF_NUM_LOGIC_CHANNELS)
90 maxch = g_variant_get_int32(src->data);
98 sdi = g_new0(struct sr_dev_inst, 1);
99 sdi->status = SR_ST_INACTIVE;
100 sdi->model = g_strdup("BeagleLogic");
101 sdi->version = g_strdup("1.0");
103 devc = beaglelogic_devc_alloc();
105 for (i = 0; i < maxch; i++)
106 sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
112 sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);
114 return std_scan_complete(di, g_slist_append(NULL, sdi));
117 static int dev_open(struct sr_dev_inst *sdi)
119 struct dev_context *devc = sdi->priv;
121 /* Open BeagleLogic */
122 if (beaglelogic_open_nonblock(devc))
125 /* Set fd and local attributes */
126 devc->pollfd.fd = devc->fd;
127 devc->pollfd.events = G_IO_IN;
128 devc->pollfd.revents = 0;
130 /* Get the default attributes */
131 beaglelogic_get_samplerate(devc);
132 beaglelogic_get_sampleunit(devc);
133 beaglelogic_get_buffersize(devc);
134 beaglelogic_get_bufunitsize(devc);
136 /* Set the triggerflags to default for continuous capture unless we
137 * explicitly limit samples using SR_CONF_LIMIT_SAMPLES */
138 devc->triggerflags = BL_TRIGGERFLAGS_CONTINUOUS;
139 beaglelogic_set_triggerflags(devc);
141 /* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
142 if (beaglelogic_mmap(devc) != SR_OK) {
143 sr_err("Unable to map capture buffer");
144 beaglelogic_close(devc);
151 static int dev_close(struct sr_dev_inst *sdi)
153 struct dev_context *devc = sdi->priv;
155 /* Close the memory mapping and the file */
156 beaglelogic_munmap(devc);
157 beaglelogic_close(devc);
162 static int config_get(uint32_t key, GVariant **data,
163 const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
165 struct dev_context *devc = sdi->priv;
170 case SR_CONF_LIMIT_SAMPLES:
171 *data = g_variant_new_uint64(devc->limit_samples);
173 case SR_CONF_SAMPLERATE:
174 *data = g_variant_new_uint64(devc->cur_samplerate);
176 case SR_CONF_CAPTURE_RATIO:
177 *data = g_variant_new_uint64(devc->capture_ratio);
179 case SR_CONF_NUM_LOGIC_CHANNELS:
180 *data = g_variant_new_uint32(g_slist_length(sdi->channels));
189 static int config_set(uint32_t key, GVariant *data,
190 const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
192 struct dev_context *devc = sdi->priv;
198 case SR_CONF_SAMPLERATE:
199 devc->cur_samplerate = g_variant_get_uint64(data);
200 return beaglelogic_set_samplerate(devc);
201 case SR_CONF_LIMIT_SAMPLES:
202 tmp_u64 = g_variant_get_uint64(data);
203 devc->limit_samples = tmp_u64;
204 devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;
206 /* Check if we have sufficient buffer size */
207 tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
208 if (tmp_u64 > devc->buffersize) {
209 sr_warn("Insufficient buffer space has been allocated.");
210 sr_warn("Please use \'echo <size in bytes> > "\
211 BEAGLELOGIC_SYSFS_ATTR(memalloc) \
212 "\' to increase the buffer size, this"\
213 " capture is now truncated to %d Msamples",
215 (SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
217 return beaglelogic_set_triggerflags(devc);
218 case SR_CONF_CAPTURE_RATIO:
219 devc->capture_ratio = g_variant_get_uint64(data);
228 static int config_list(uint32_t key, GVariant **data,
229 const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
232 case SR_CONF_SCAN_OPTIONS:
233 case SR_CONF_DEVICE_OPTIONS:
234 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
235 case SR_CONF_SAMPLERATE:
236 *data = std_gvar_samplerates_steps(ARRAY_AND_SIZE(samplerates));
238 case SR_CONF_TRIGGER_MATCH:
239 *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
248 /* get a sane timeout for poll() */
249 #define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \
250 (uint32_t)(devc->cur_samplerate)))
252 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
254 struct dev_context *devc = sdi->priv;
256 struct sr_trigger *trigger;
257 struct sr_channel *channel;
259 /* Clear capture state */
260 devc->bytes_read = 0;
263 /* Configure channels */
264 devc->sampleunit = BL_SAMPLEUNIT_8_BITS;
266 for (l = sdi->channels; l; l = l->next) {
268 if (channel->index >= 8 && channel->enabled)
269 devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
271 beaglelogic_set_sampleunit(devc);
273 /* Configure triggers & send header packet */
274 if ((trigger = sr_session_trigger_get(sdi->session))) {
275 int pre_trigger_samples = 0;
276 if (devc->limit_samples > 0)
277 pre_trigger_samples = (devc->capture_ratio * devc->limit_samples) / 100;
278 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
280 return SR_ERR_MALLOC;
281 devc->trigger_fired = FALSE;
283 devc->trigger_fired = TRUE;
284 std_session_send_df_header(sdi);
286 /* Trigger and add poll on file */
287 beaglelogic_start(devc);
288 sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
289 BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data,
295 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
297 struct dev_context *devc = sdi->priv;
299 /* Execute a stop on BeagleLogic */
300 beaglelogic_stop(devc);
302 /* lseek to offset 0, flushes the cache */
303 lseek(devc->fd, 0, SEEK_SET);
305 /* Remove session source and send EOT packet */
306 sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
307 std_session_send_df_end(sdi);
312 static struct sr_dev_driver beaglelogic_driver_info = {
313 .name = "beaglelogic",
314 .longname = "BeagleLogic",
317 .cleanup = std_cleanup,
319 .dev_list = std_dev_list,
320 .dev_clear = std_dev_clear,
321 .config_get = config_get,
322 .config_set = config_set,
323 .config_list = config_list,
324 .dev_open = dev_open,
325 .dev_close = dev_close,
326 .dev_acquisition_start = dev_acquisition_start,
327 .dev_acquisition_stop = dev_acquisition_stop,
330 SR_REGISTER_DEV_DRIVER(beaglelogic_driver_info);