+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2014 Kumar Abhishek <abhishek@theembeddedkitchen.net>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "protocol.h"
-#include "beaglelogic.h"
-
-SR_PRIV struct sr_dev_driver beaglelogic_driver_info;
-static struct sr_dev_driver *di = &beaglelogic_driver_info;
-
-/* Hardware capabiities */
-static const int32_t hwcaps[] = {
- SR_CONF_LOGIC_ANALYZER,
- SR_CONF_SAMPLERATE,
- SR_CONF_TRIGGER_MATCH,
-
- SR_CONF_LIMIT_SAMPLES,
- SR_CONF_CONTINUOUS,
-
- SR_CONF_NUM_LOGIC_CHANNELS,
-};
-
-/* Trigger matching capabilities */
-static const int32_t soft_trigger_matches[] = {
- SR_TRIGGER_ZERO,
- SR_TRIGGER_ONE,
- SR_TRIGGER_RISING,
- SR_TRIGGER_FALLING,
- SR_TRIGGER_EDGE,
-};
-
-/* Channels are numbered 0-13 */
-SR_PRIV const char *beaglelogic_channel_names[NUM_CHANNELS + 1] = {
- "P8_45", "P8_46", "P8_43", "P8_44", "P8_41", "P8_42", "P8_39", "P8_40",
- "P8_27", "P8_29", "P8_28", "P8_30", "P8_21", "P8_20", NULL,
-};
-
-/* Possible sample rates : 10 Hz to 100 MHz = (100 / x) MHz */
-static const uint64_t samplerates[] = {
- SR_HZ(10),
- SR_MHZ(100),
- SR_HZ(1),
-};
-
-static int init(struct sr_context *sr_ctx)
-{
- return std_init(sr_ctx, di, LOG_PREFIX);
-}
-
-static struct dev_context * beaglelogic_devc_alloc(void)
-{
- struct dev_context *devc;
-
- /* Allocate zeroed structure */
- devc = g_try_malloc0(sizeof(*devc));
-
- /* Default non-zero values (if any) */
- devc->fd = -1;
- devc->limit_samples = (uint64_t)-1;
-
- return devc;
-}
-
-static GSList *scan(GSList *options)
-{
- struct drv_context *drvc;
- GSList *devices, *l;
- struct sr_config *src;
- struct sr_dev_inst *sdi;
- struct dev_context *devc;
- struct sr_channel *ch;
- int i, maxch;
-
- devices = NULL;
- drvc = di->priv;
- drvc->instances = NULL;
-
- /* Probe for /dev/beaglelogic */
- if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
- return NULL;
-
- sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, NULL, "BeagleLogic", "1.0");
- sdi->driver = di;
-
- /* Unless explicitly specified, keep max channels to 8 only */
- maxch = 8;
- for (l = options; l; l = l->next) {
- src = l->data;
- if (src->key == SR_CONF_NUM_LOGIC_CHANNELS)
- maxch = g_variant_get_int32(src->data);
- }
-
- /* We need to test for number of channels by opening the node */
- devc = beaglelogic_devc_alloc();
-
- if (beaglelogic_open_nonblock(devc) != SR_OK) {
- g_free(devc);
- sr_dev_inst_free(sdi);
-
- return NULL;
- }
-
- if (maxch > 8) {
- maxch = NUM_CHANNELS;
- devc->sampleunit = BL_SAMPLEUNIT_16_BITS;
- } else {
- maxch = 8;
- devc->sampleunit = BL_SAMPLEUNIT_8_BITS;
- }
-
- beaglelogic_set_sampleunit(devc);
- beaglelogic_close(devc);
-
- /* Signal */
- sr_info("BeagleLogic device found at "BEAGLELOGIC_DEV_NODE);
-
- /* Fill the channels */
- for (i = 0; i < maxch; i++) {
- if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
- beaglelogic_channel_names[i])))
- return NULL;
- sdi->channels = g_slist_append(sdi->channels, ch);
- }
-
- sdi->priv = devc;
- drvc->instances = g_slist_append(drvc->instances, sdi);
- devices = g_slist_append(devices, sdi);
-
- return devices;
-}
-
-static GSList *dev_list(void)
-{
- return ((struct drv_context *)(di->priv))->instances;
-}
-
-static int dev_clear(void)
-{
- return std_dev_clear(di, NULL);
-}
-
-static int dev_open(struct sr_dev_inst *sdi)
-{
- struct dev_context *devc = sdi->priv;
-
- /* Open BeagleLogic */
- if (beaglelogic_open_nonblock(devc))
- return SR_ERR;
-
- /* Set fd and local attributes */
- devc->pollfd.fd = devc->fd;
- devc->pollfd.events = G_IO_IN;
-
- /* Get the default attributes */
- beaglelogic_get_samplerate(devc);
- beaglelogic_get_sampleunit(devc);
- beaglelogic_get_triggerflags(devc);
- beaglelogic_get_buffersize(devc);
- beaglelogic_get_bufunitsize(devc);
-
- /* Map the kernel capture FIFO for reads, saves 1 level of memcpy */
- if (beaglelogic_mmap(devc) != SR_OK) {
- sr_err("Unable to map capture buffer");
- beaglelogic_close(devc);
- return SR_ERR;
- }
-
- /* We're good to go now */
- sdi->status = SR_ST_ACTIVE;
- return SR_OK;
-}
-
-static int dev_close(struct sr_dev_inst *sdi)
-{
- struct dev_context *devc = sdi->priv;
-
- if (sdi->status == SR_ST_ACTIVE) {
- /* Close the memory mapping and the file */
- beaglelogic_munmap(devc);
- beaglelogic_close(devc);
- }
- sdi->status = SR_ST_INACTIVE;
- return SR_OK;
-}
-
-static int cleanup(void)
-{
- struct drv_context *drvc;
- struct sr_dev_inst *sdi;
- GSList *l;
-
- /* unused driver */
- if (!(drvc = di->priv))
- return SR_OK;
-
- /* Clean up the instances */
- for (l = drvc->instances; l; l = l->next) {
- sdi = l->data;
- di->dev_close(sdi);
- g_free(sdi->priv);
- sr_dev_inst_free(sdi);
- }
- g_slist_free(drvc->instances);
- drvc->instances = NULL;
-
- di->priv = NULL;
-
- return SR_OK;
-}
-
-static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
- const struct sr_channel_group *cg)
-{
- struct dev_context *devc = sdi->priv;
- (void)cg;
-
- switch (key) {
- case SR_CONF_LIMIT_SAMPLES:
- *data = g_variant_new_uint64(devc->limit_samples);
- break;
-
- case SR_CONF_SAMPLERATE:
- *data = g_variant_new_uint64(devc->cur_samplerate);
- break;
-
- case SR_CONF_NUM_LOGIC_CHANNELS:
- *data = g_variant_new_uint32(g_slist_length(sdi->channels));
- break;
-
- default:
- return SR_ERR_NA;
- }
-
- return SR_OK;
-}
-
-static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
- const struct sr_channel_group *cg)
-{
- struct dev_context *devc = sdi->priv;
- uint64_t tmp_u64;
- (void)cg;
-
- if (sdi->status != SR_ST_ACTIVE)
- return SR_ERR_DEV_CLOSED;
-
- switch (key) {
- case SR_CONF_SAMPLERATE:
- devc->cur_samplerate = g_variant_get_uint64(data);
- return beaglelogic_set_samplerate(devc);
-
- case SR_CONF_LIMIT_SAMPLES:
- tmp_u64 = g_variant_get_uint64(data);
- devc->limit_samples = tmp_u64;
- devc->triggerflags = BL_TRIGGERFLAGS_ONESHOT;
-
- /* Check if we have sufficient buffer size */
- tmp_u64 *= SAMPLEUNIT_TO_BYTES(devc->sampleunit);
- if (tmp_u64 > devc->buffersize) {
- sr_warn("Insufficient buffer space has been allocated.");
- sr_warn("Please use \'echo <size in bytes> > "\
- BEAGLELOGIC_SYSFS_ATTR(memalloc) \
- "\' as root to increase the buffer size, this"\
- " capture is now truncated to %d Msamples",
- devc->buffersize /
- (SAMPLEUNIT_TO_BYTES(devc->sampleunit) * 1000000));
- }
- return beaglelogic_set_triggerflags(devc);
-
- default:
- return SR_ERR_NA;
- }
-
- return SR_OK;
-}
-
-static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
- const struct sr_channel_group *cg)
-{
- int ret;
- GVariant *gvar;
- GVariantBuilder gvb;
-
- (void)sdi;
- (void)data;
- (void)cg;
-
- ret = SR_OK;
- switch (key) {
- case SR_CONF_DEVICE_OPTIONS:
- *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
- hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
- break;
- case SR_CONF_SAMPLERATE:
- g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
- gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
- samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
- g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
- *data = g_variant_builder_end(&gvb);
- break;
- case SR_CONF_TRIGGER_MATCH:
- *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
- soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
- sizeof(int32_t));
- break;
- default:
- return SR_ERR_NA;
- }
-
- return ret;
-}
-
-/* get a sane timeout for poll() */
-#define BUFUNIT_TIMEOUT_MS(devc) (100 + ((devc->bufunitsize * 1000) / \
- (uint32_t)(devc->cur_samplerate)))
-
-static int dev_acquisition_start(const struct sr_dev_inst *sdi,
- void *cb_data)
-{
- (void)cb_data;
- struct dev_context *devc = sdi->priv;
- struct sr_trigger *trigger;
-
- if (sdi->status != SR_ST_ACTIVE)
- return SR_ERR_DEV_CLOSED;
-
- /* Save user pointer */
- devc->cb_data = cb_data;
-
- /* Clear capture state */
- devc->bytes_read = 0;
- devc->offset = 0;
-
- /* Configure channels */
- devc->sampleunit = g_slist_length(sdi->channels) > 8 ?
- BL_SAMPLEUNIT_16_BITS : BL_SAMPLEUNIT_8_BITS;
- beaglelogic_set_sampleunit(devc);
-
- /* Configure triggers & send header packet */
- if ((trigger = sr_session_trigger_get(sdi->session))) {
- devc->stl = soft_trigger_logic_new(sdi, trigger);
- devc->trigger_fired = FALSE;
- } else
- devc->trigger_fired = TRUE;
- std_session_send_df_header(cb_data, LOG_PREFIX);
-
- /* Trigger and add poll on file */
- beaglelogic_start(devc);
- sr_session_source_add_pollfd(sdi->session, &devc->pollfd,
- BUFUNIT_TIMEOUT_MS(devc), beaglelogic_receive_data,
- (void *)sdi);
-
- return SR_OK;
-}
-
-static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
-{
- struct dev_context *devc = sdi->priv;
- struct sr_datafeed_packet pkt;
-
- (void)cb_data;
-
- if (sdi->status != SR_ST_ACTIVE)
- return SR_ERR_DEV_CLOSED;
-
- /* Execute a stop on BeagleLogic */
- beaglelogic_stop(devc);
-
- /* lseek to offset 0, flushes the cache */
- lseek(devc->fd, 0, SEEK_SET);
-
- /* Remove session source and send EOT packet */
- sr_session_source_remove_pollfd(sdi->session, &devc->pollfd);
- pkt.type = SR_DF_END;
- pkt.payload = NULL;
- sr_session_send(sdi, &pkt);
-
- return SR_OK;
-}
-
-SR_PRIV struct sr_dev_driver beaglelogic_driver_info = {
- .name = "beaglelogic",
- .longname = "BeagleLogic",
- .api_version = 1,
- .init = init,
- .cleanup = cleanup,
- .scan = scan,
- .dev_list = dev_list,
- .dev_clear = dev_clear,
- .config_get = config_get,
- .config_set = config_set,
- .config_list = config_list,
- .dev_open = dev_open,
- .dev_close = dev_close,
- .dev_acquisition_start = dev_acquisition_start,
- .dev_acquisition_stop = dev_acquisition_stop,
- .priv = NULL,
-};
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