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))
86 sdi = g_malloc0(sizeof(struct sr_dev_inst));
87 sdi->status = SR_ST_INACTIVE;
88 sdi->model = g_strdup("BeagleLogic");
89 sdi->version = g_strdup("1.0");
91 /* Unless explicitly specified, keep max channels to 8 only */
93 for (l = options; l; l = l->next) {
95 if (src->key == SR_CONF_NUM_LOGIC_CHANNELS)
96 maxch = g_variant_get_int32(src->data);
99 /* We need to test for number of channels by opening the node */
100 devc = beaglelogic_devc_alloc();
102 if (beaglelogic_open_nonblock(devc) != SR_OK) {
104 sr_dev_inst_free(sdi);
110 maxch = NUM_CHANNELS;
111 devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
114 devc->sampleunit = BL_SAMPLEUNIT_8_BITS;
117 beaglelogic_set_sampleunit(devc);
118 beaglelogic_close(devc);
120 sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);
122 for (i = 0; i < maxch; i++)
123 sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
128 return std_scan_complete(di, g_slist_append(NULL, sdi));
131 static int dev_open(struct sr_dev_inst *sdi)
133 struct dev_context *devc = sdi->priv;
135 /* Open BeagleLogic */
136 if (beaglelogic_open_nonblock(devc))
139 /* Set fd and local attributes */
140 devc->pollfd.fd = devc->fd;
141 devc->pollfd.events = G_IO_IN;
142 devc->pollfd.revents = 0;
144 /* Get the default attributes */
145 beaglelogic_get_samplerate(devc);
146 beaglelogic_get_sampleunit(devc);
147 beaglelogic_get_triggerflags(devc);
148 beaglelogic_get_buffersize(devc);
149 beaglelogic_get_bufunitsize(devc);
151 /* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
152 if (beaglelogic_mmap(devc) != SR_OK) {
153 sr_err("Unable to map capture buffer");
154 beaglelogic_close(devc);
161 static int dev_close(struct sr_dev_inst *sdi)
163 struct dev_context *devc = sdi->priv;
165 /* Close the memory mapping and the file */
166 beaglelogic_munmap(devc);
167 beaglelogic_close(devc);
172 static int config_get(uint32_t key, GVariant **data,
173 const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
175 struct dev_context *devc = sdi->priv;
180 case SR_CONF_LIMIT_SAMPLES:
181 *data = g_variant_new_uint64(devc->limit_samples);
183 case SR_CONF_SAMPLERATE:
184 *data = g_variant_new_uint64(devc->cur_samplerate);
186 case SR_CONF_CAPTURE_RATIO:
187 *data = g_variant_new_uint64(devc->capture_ratio);
189 case SR_CONF_NUM_LOGIC_CHANNELS:
190 *data = g_variant_new_uint32(g_slist_length(sdi->channels));
199 static int config_set(uint32_t key, GVariant *data,
200 const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
202 struct dev_context *devc = sdi->priv;
208 case SR_CONF_SAMPLERATE:
209 devc->cur_samplerate = g_variant_get_uint64(data);
210 return beaglelogic_set_samplerate(devc);
211 case SR_CONF_LIMIT_SAMPLES:
212 tmp_u64 = g_variant_get_uint64(data);
213 devc->limit_samples = tmp_u64;
214 devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;
216 /* Check if we have sufficient buffer size */
217 tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
218 if (tmp_u64 > devc->buffersize) {
219 sr_warn("Insufficient buffer space has been allocated.");
220 sr_warn("Please use \'echo <size in bytes> > "\
221 BEAGLELOGIC_SYSFS_ATTR(memalloc) \
222 "\' as root to increase the buffer size, this"\
223 " capture is now truncated to %d Msamples",
225 (SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
227 return beaglelogic_set_triggerflags(devc);
228 case SR_CONF_CAPTURE_RATIO:
229 devc->capture_ratio = g_variant_get_uint64(data);
238 static int config_list(uint32_t key, GVariant **data,
239 const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
242 case SR_CONF_SCAN_OPTIONS:
243 case SR_CONF_DEVICE_OPTIONS:
244 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
245 case SR_CONF_SAMPLERATE:
246 *data = std_gvar_samplerates_steps(ARRAY_AND_SIZE(samplerates));
248 case SR_CONF_TRIGGER_MATCH:
249 *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
258 /* get a sane timeout for poll() */
259 #define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \
260 (uint32_t)(devc->cur_samplerate)))
262 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
264 struct dev_context *devc = sdi->priv;
265 struct sr_trigger *trigger;
267 /* Clear capture state */
268 devc->bytes_read = 0;
271 /* Configure channels */
272 devc->sampleunit = g_slist_length(sdi->channels) > 8 ?
273 BL_SAMPLEUNIT_16_BITS : BL_SAMPLEUNIT_8_BITS;
274 beaglelogic_set_sampleunit(devc);
276 /* Configure triggers & send header packet */
277 if ((trigger = sr_session_trigger_get(sdi->session))) {
278 int pre_trigger_samples = 0;
279 if (devc->limit_samples > 0)
280 pre_trigger_samples = (devc->capture_ratio * devc->limit_samples) / 100;
281 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
283 return SR_ERR_MALLOC;
284 devc->trigger_fired = FALSE;
286 devc->trigger_fired = TRUE;
287 std_session_send_df_header(sdi);
289 /* Trigger and add poll on file */
290 beaglelogic_start(devc);
291 sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
292 BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data,
298 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
300 struct dev_context *devc = sdi->priv;
302 /* Execute a stop on BeagleLogic */
303 beaglelogic_stop(devc);
305 /* lseek to offset 0, flushes the cache */
306 lseek(devc->fd, 0, SEEK_SET);
308 /* Remove session source and send EOT packet */
309 sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
310 std_session_send_df_end(sdi);
315 static struct sr_dev_driver beaglelogic_driver_info = {
316 .name = "beaglelogic",
317 .longname = "BeagleLogic",
320 .cleanup = std_cleanup,
322 .dev_list = std_dev_list,
323 .dev_clear = std_dev_clear,
324 .config_get = config_get,
325 .config_set = config_set,
326 .config_list = config_list,
327 .dev_open = dev_open,
328 .dev_close = dev_close,
329 .dev_acquisition_start = dev_acquisition_start,
330 .dev_acquisition_stop = dev_acquisition_stop,
333 SR_REGISTER_DEV_DRIVER(beaglelogic_driver_info);