-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2012 Martin Ling <martin-git@earth.li>
- * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
- *
- * 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 <fcntl.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-#include <glib.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-#include "protocol.h"
-
-#define NUM_TIMEBASE 12
-#define NUM_VDIV 8
-
-static const int32_t hwopts[] = {
- SR_CONF_CONN,
-};
-
-static const int32_t hwcaps[] = {
- SR_CONF_OSCILLOSCOPE,
- SR_CONF_TIMEBASE,
- SR_CONF_TRIGGER_SOURCE,
- SR_CONF_TRIGGER_SLOPE,
- SR_CONF_HORIZ_TRIGGERPOS,
- SR_CONF_NUM_TIMEBASE,
-};
-
-static const int32_t analog_hwcaps[] = {
- SR_CONF_NUM_VDIV,
- SR_CONF_VDIV,
- SR_CONF_COUPLING,
-};
-
-static const uint64_t timebases[][2] = {
- /* nanoseconds */
- { 2, 1000000000 },
- { 5, 1000000000 },
- { 10, 1000000000 },
- { 20, 1000000000 },
- { 50, 1000000000 },
- { 100, 1000000000 },
- { 500, 1000000000 },
- /* microseconds */
- { 1, 1000000 },
- { 2, 1000000 },
- { 5, 1000000 },
- { 10, 1000000 },
- { 20, 1000000 },
- { 50, 1000000 },
- { 100, 1000000 },
- { 200, 1000000 },
- { 500, 1000000 },
- /* milliseconds */
- { 1, 1000 },
- { 2, 1000 },
- { 5, 1000 },
- { 10, 1000 },
- { 20, 1000 },
- { 50, 1000 },
- { 100, 1000 },
- { 200, 1000 },
- { 500, 1000 },
- /* seconds */
- { 1, 1 },
- { 2, 1 },
- { 5, 1 },
- { 10, 1 },
- { 20, 1 },
- { 50, 1 },
-};
-
-static const uint64_t vdivs[][2] = {
- /* millivolts */
- { 2, 1000 },
- { 5, 1000 },
- { 10, 1000 },
- { 20, 1000 },
- { 50, 1000 },
- { 100, 1000 },
- { 200, 1000 },
- { 500, 1000 },
- /* volts */
- { 1, 1 },
- { 2, 1 },
- { 5, 1 },
- { 10, 1 },
-};
-
-static const char *trigger_sources[] = {
- "CH1",
- "CH2",
- "EXT",
- "AC Line",
- "D0",
- "D1",
- "D2",
- "D3",
- "D4",
- "D5",
- "D6",
- "D7",
- "D8",
- "D9",
- "D10",
- "D11",
- "D12",
- "D13",
- "D14",
- "D15",
-};
-
-static const char *coupling[] = {
- "AC",
- "DC",
- "GND",
-};
-
-static const char *supported_models[] = {
- "DS1052E",
- "DS1102E",
- "DS1152E",
- "DS1052D",
- "DS1102D",
- "DS1152D",
-};
-
-SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
-static struct sr_dev_driver *di = &rigol_ds1xx2_driver_info;
-
-static void clear_helper(void *priv)
-{
- struct dev_context *devc;
-
- devc = priv;
- g_free(devc->coupling[0]);
- g_free(devc->coupling[1]);
- g_free(devc->trigger_source);
- g_free(devc->trigger_slope);
- g_slist_free(devc->analog_groups[0].probes);
- g_slist_free(devc->analog_groups[1].probes);
- g_slist_free(devc->digital_group.probes);
-}
-
-static int dev_clear(void)
-{
- return std_dev_clear(di, clear_helper);
-}
-
-static int set_cfg(const struct sr_dev_inst *sdi, const char *format, ...)
-{
- va_list args;
- char buf[256];
-
- va_start(args, format);
- vsnprintf(buf, 255, format, args);
- va_end(args);
- if (rigol_ds1xx2_send(sdi, buf) != SR_OK)
- return SR_ERR;
-
- /* When setting a bunch of parameters in a row, the DS1052E scrambles
- * some of them unless there is at least 100ms delay in between. */
- sr_spew("delay %dms", 100);
- g_usleep(100000);
-
- return SR_OK;
-}
-
-static int init(struct sr_context *sr_ctx)
-{
- return std_init(sr_ctx, di, LOG_PREFIX);
-}
-
-static int probe_port(const char *port, GSList **devices)
-{
- struct dev_context *devc;
- struct sr_dev_inst *sdi;
- struct sr_serial_dev_inst *serial;
- struct sr_probe *probe;
- unsigned int i;
- int len, num_tokens;
- gboolean matched, has_digital;
- const char *manufacturer, *model, *version;
- char buf[256];
- gchar **tokens, *channel_name;
-
- *devices = NULL;
- if (!(serial = sr_serial_dev_inst_new(port, NULL)))
- return SR_ERR_MALLOC;
-
- if (serial_open(serial, SERIAL_RDWR) != SR_OK)
- return SR_ERR;
- len = serial_write(serial, "*IDN?", 5);
- len = serial_read(serial, buf, sizeof(buf));
- if (serial_close(serial) != SR_OK)
- return SR_ERR;
-
- sr_serial_dev_inst_free(serial);
-
- if (len == 0)
- return SR_ERR_NA;
-
- buf[len] = 0;
- tokens = g_strsplit(buf, ",", 0);
- sr_dbg("response: %s [%s]", port, buf);
-
- for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
-
- if (num_tokens < 4) {
- g_strfreev(tokens);
- return SR_ERR_NA;
- }
-
- manufacturer = tokens[0];
- model = tokens[1];
- version = tokens[3];
-
- if (strcmp(manufacturer, "Rigol Technologies")) {
- g_strfreev(tokens);
- return SR_ERR_NA;
- }
-
- matched = has_digital = FALSE;
- for (i = 0; i < ARRAY_SIZE(supported_models); i++) {
- if (!strcmp(model, supported_models[i])) {
- matched = TRUE;
- has_digital = g_str_has_suffix(model, "D");
- break;
- }
- }
-
- if (!matched || !(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
- manufacturer, model, version))) {
- g_strfreev(tokens);
- return SR_ERR_NA;
- }
-
- g_strfreev(tokens);
-
- if (!(sdi->conn = sr_serial_dev_inst_new(port, NULL)))
- return SR_ERR_MALLOC;
- sdi->driver = di;
- sdi->inst_type = SR_INST_SERIAL;
-
- if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
- return SR_ERR_MALLOC;
- devc->limit_frames = 0;
- devc->has_digital = has_digital;
-
- for (i = 0; i < 2; i++) {
- channel_name = (i == 0 ? "CH1" : "CH2");
- if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE, channel_name)))
- return SR_ERR_MALLOC;
- sdi->probes = g_slist_append(sdi->probes, probe);
- devc->analog_groups[i].name = channel_name;
- devc->analog_groups[i].probes = g_slist_append(NULL, probe);
- sdi->probe_groups = g_slist_append(sdi->probe_groups,
- &devc->analog_groups[i]);
- }
-
- if (devc->has_digital) {
- for (i = 0; i < 16; i++) {
- if (!(channel_name = g_strdup_printf("D%d", i)))
- return SR_ERR_MALLOC;
- probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE, channel_name);
- g_free(channel_name);
- if (!probe)
- return SR_ERR_MALLOC;
- sdi->probes = g_slist_append(sdi->probes, probe);
- devc->digital_group.probes = g_slist_append(
- devc->digital_group.probes, probe);
- devc->digital_group.name = "LA";
- sdi->probe_groups = g_slist_append(sdi->probe_groups,
- &devc->digital_group);
- }
- }
- sdi->priv = devc;
-
- *devices = g_slist_append(NULL, sdi);
-
- return SR_OK;
-}
-
-static GSList *scan(GSList *options)
-{
- struct drv_context *drvc;
- struct sr_config *src;
- GSList *l, *devices;
- GDir *dir;
- int ret;
- const gchar *dev_name;
- gchar *port = NULL;
-
- drvc = di->priv;
-
- for (l = options; l; l = l->next) {
- src = l->data;
- if (src->key == SR_CONF_CONN) {
- port = (char *)g_variant_get_string(src->data, NULL);
- break;
- }
- }
-
- devices = NULL;
- if (port) {
- if (probe_port(port, &devices) == SR_ERR_MALLOC)
- return NULL;
- } else {
- if (!(dir = g_dir_open("/sys/class/usbmisc/", 0, NULL)))
- if (!(dir = g_dir_open("/sys/class/usb/", 0, NULL)))
- return NULL;
- while ((dev_name = g_dir_read_name(dir))) {
- if (strncmp(dev_name, "usbtmc", 6))
- continue;
- port = g_strconcat("/dev/", dev_name, NULL);
- ret = probe_port(port, &devices);
- g_free(port);
- if (ret == SR_ERR_MALLOC) {
- g_dir_close(dir);
- return NULL;
- }
- }
- g_dir_close(dir);
- }
-
- /* Tack a copy of the newly found devices onto the driver list. */
- l = g_slist_copy(devices);
- drvc->instances = g_slist_concat(drvc->instances, l);
-
- return devices;
-}
-
-static GSList *dev_list(void)
-{
- return ((struct drv_context *)(di->priv))->instances;
-}
-
-static int dev_open(struct sr_dev_inst *sdi)
-{
-
- if (serial_open(sdi->conn, SERIAL_RDWR) != SR_OK)
- return SR_ERR;
-
- if (rigol_ds1xx2_get_dev_cfg(sdi) != SR_OK)
- return SR_ERR;
-
- sdi->status = SR_ST_ACTIVE;
-
- return SR_OK;
-}
-
-static int dev_close(struct sr_dev_inst *sdi)
-{
- struct sr_serial_dev_inst *serial;
-
- serial = sdi->conn;
- if (serial && serial->fd != -1) {
- serial_close(serial);
- sdi->status = SR_ST_INACTIVE;
- }
-
- return SR_OK;
-}
-
-static int cleanup(void)
-{
- return dev_clear();
-}
-
-static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
- const struct sr_probe_group *probe_group)
-{
- struct dev_context *devc;
- unsigned int i;
-
- if (!sdi || !(devc = sdi->priv))
- return SR_ERR_ARG;
-
- /* If a probe group is specified, it must be a valid one. */
- if (probe_group) {
- if (probe_group != &devc->analog_groups[0]
- && probe_group != &devc->analog_groups[1]) {
- sr_err("Invalid probe group specified.");
- return SR_ERR;
- }
- }
-
- switch (id) {
- case SR_CONF_NUM_TIMEBASE:
- *data = g_variant_new_int32(NUM_TIMEBASE);
- break;
- case SR_CONF_NUM_VDIV:
- if (!probe_group) {
- sr_err("No probe group specified.");
- return SR_ERR_PROBE_GROUP;
- }
- for (i = 0; i < 2; i++) {
- if (probe_group == &devc->analog_groups[i]) {
- *data = g_variant_new_int32(NUM_VDIV);
- return SR_OK;
- }
- }
- return SR_ERR_NA;
- default:
- return SR_ERR_NA;
- }
-
- return SR_OK;
-}
-
-static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
- const struct sr_probe_group *probe_group)
-{
- struct dev_context *devc;
- uint64_t tmp_u64, p, q;
- double t_dbl;
- unsigned int i, j;
- int ret;
- const char *tmp_str;
-
- if (!(devc = sdi->priv))
- return SR_ERR_ARG;
-
- if (sdi->status != SR_ST_ACTIVE)
- return SR_ERR_DEV_CLOSED;
-
- /* If a probe group is specified, it must be a valid one. */
- if (probe_group) {
- if (probe_group != &devc->analog_groups[0]
- && probe_group != &devc->analog_groups[1]) {
- sr_err("Invalid probe group specified.");
- return SR_ERR;
- }
- }
-
- ret = SR_OK;
- switch (id) {
- case SR_CONF_LIMIT_FRAMES:
- devc->limit_frames = g_variant_get_uint64(data);
- break;
- case SR_CONF_TRIGGER_SLOPE:
- tmp_u64 = g_variant_get_uint64(data);
- if (tmp_u64 != 0 && tmp_u64 != 1)
- return SR_ERR;
- g_free(devc->trigger_slope);
- devc->trigger_slope = g_strdup(tmp_u64 ? "POS" : "NEG");
- ret = set_cfg(sdi, ":TRIG:EDGE:SLOP %s", devc->trigger_slope);
- break;
- case SR_CONF_HORIZ_TRIGGERPOS:
- t_dbl = g_variant_get_double(data);
- if (t_dbl < 0.0 || t_dbl > 1.0)
- return SR_ERR;
- devc->horiz_triggerpos = t_dbl;
- /* We have the trigger offset as a percentage of the frame, but
- * need to express this in seconds. */
- t_dbl = -(devc->horiz_triggerpos - 0.5) * devc->timebase * NUM_TIMEBASE;
- ret = set_cfg(sdi, ":TIM:OFFS %.6f", t_dbl);
- break;
- case SR_CONF_TIMEBASE:
- g_variant_get(data, "(tt)", &p, &q);
- for (i = 0; i < ARRAY_SIZE(timebases); i++) {
- if (timebases[i][0] == p && timebases[i][1] == q) {
- devc->timebase = (float)p / q;
- ret = set_cfg(sdi, ":TIM:SCAL %.9f", devc->timebase);
- break;
- }
- }
- if (i == ARRAY_SIZE(timebases))
- ret = SR_ERR_ARG;
- break;
- case SR_CONF_TRIGGER_SOURCE:
- tmp_str = g_variant_get_string(data, NULL);
- for (i = 0; i < ARRAY_SIZE(trigger_sources); i++) {
- if (!strcmp(trigger_sources[i], tmp_str)) {
- g_free(devc->trigger_source);
- devc->trigger_source = g_strdup(trigger_sources[i]);
- if (!strcmp(devc->trigger_source, "AC Line"))
- tmp_str = "ACL";
- else if (!strcmp(devc->trigger_source, "CH1"))
- tmp_str = "CHAN1";
- else if (!strcmp(devc->trigger_source, "CH2"))
- tmp_str = "CHAN2";
- else
- tmp_str = (char *)devc->trigger_source;
- ret = set_cfg(sdi, ":TRIG:EDGE:SOUR %s", tmp_str);
- break;
- }
- }
- if (i == ARRAY_SIZE(trigger_sources))
- ret = SR_ERR_ARG;
- break;
- case SR_CONF_VDIV:
- if (!probe_group) {
- sr_err("No probe group specified.");
- return SR_ERR_PROBE_GROUP;
- }
- g_variant_get(data, "(tt)", &p, &q);
- for (i = 0; i < 2; i++) {
- if (probe_group == &devc->analog_groups[i]) {
- for (j = 0; j < ARRAY_SIZE(vdivs); j++) {
- if (vdivs[j][0] != p || vdivs[j][1] != q)
- continue;
- devc->vdiv[i] = (float)p / q;
- return set_cfg(sdi, ":CHAN%d:SCAL %.3f", i + 1,
- devc->vdiv[i]);
- }
- return SR_ERR_ARG;
- }
- }
- return SR_ERR_NA;
- case SR_CONF_COUPLING:
- if (!probe_group) {
- sr_err("No probe group specified.");
- return SR_ERR_PROBE_GROUP;
- }
- tmp_str = g_variant_get_string(data, NULL);
- for (i = 0; i < 2; i++) {
- if (probe_group == &devc->analog_groups[i]) {
- for (j = 0; j < ARRAY_SIZE(coupling); j++) {
- if (!strcmp(tmp_str, coupling[j])) {
- g_free(devc->coupling[i]);
- devc->coupling[i] = g_strdup(coupling[j]);
- return set_cfg(sdi, ":CHAN%d:COUP %s", i + 1,
- devc->coupling[i]);
- }
- }
- return SR_ERR_ARG;
- }
- }
- return SR_ERR_NA;
- default:
- ret = SR_ERR_NA;
- break;
- }
-
- return ret;
-}
-
-static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
- const struct sr_probe_group *probe_group)
-{
- GVariant *tuple, *rational[2];
- GVariantBuilder gvb;
- unsigned int i;
- struct dev_context *devc;
-
- if (key == SR_CONF_SCAN_OPTIONS) {
- *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
- hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
- return SR_OK;
- } else if (key == SR_CONF_DEVICE_OPTIONS && probe_group == NULL) {
- *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
- hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
- return SR_OK;
- }
-
- /* Every other option requires a valid device instance. */
- if (!sdi || !(devc = sdi->priv))
- return SR_ERR_ARG;
-
- /* If a probe group is specified, it must be a valid one. */
- if (probe_group) {
- if (probe_group != &devc->analog_groups[0]
- && probe_group != &devc->analog_groups[1]) {
- sr_err("Invalid probe group specified.");
- return SR_ERR;
- }
- }
-
- switch (key) {
- break;
- case SR_CONF_DEVICE_OPTIONS:
- if (!probe_group) {
- sr_err("No probe group specified.");
- return SR_ERR_PROBE_GROUP;
- }
- if (probe_group == &devc->digital_group) {
- *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
- NULL, 0, sizeof(int32_t));
- return SR_OK;
- } else {
- for (i = 0; i < 2; i++) {
- if (probe_group == &devc->analog_groups[i]) {
- *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
- analog_hwcaps, ARRAY_SIZE(analog_hwcaps), sizeof(int32_t));
- return SR_OK;
- }
- }
- return SR_ERR_NA;
- }
- break;
- case SR_CONF_COUPLING:
- if (!probe_group) {
- sr_err("No probe group specified.");
- return SR_ERR_PROBE_GROUP;
- }
- *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
- break;
- case SR_CONF_VDIV:
- if (!probe_group) {
- sr_err("No probe group specified.");
- return SR_ERR_PROBE_GROUP;
- }
- g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
- for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
- rational[0] = g_variant_new_uint64(vdivs[i][0]);
- rational[1] = g_variant_new_uint64(vdivs[i][1]);
- tuple = g_variant_new_tuple(rational, 2);
- g_variant_builder_add_value(&gvb, tuple);
- }
- *data = g_variant_builder_end(&gvb);
- break;
- case SR_CONF_TIMEBASE:
- g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
- for (i = 0; i < ARRAY_SIZE(timebases); i++) {
- rational[0] = g_variant_new_uint64(timebases[i][0]);
- rational[1] = g_variant_new_uint64(timebases[i][1]);
- tuple = g_variant_new_tuple(rational, 2);
- g_variant_builder_add_value(&gvb, tuple);
- }
- *data = g_variant_builder_end(&gvb);
- break;
- case SR_CONF_TRIGGER_SOURCE:
- *data = g_variant_new_strv(trigger_sources,
- devc->has_digital ? ARRAY_SIZE(trigger_sources) : 4);
- break;
- default:
- return SR_ERR_NA;
- }
-
- return SR_OK;
-}
-
-static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
-{
- struct sr_serial_dev_inst *serial;
- struct dev_context *devc;
- struct sr_probe *probe;
- GSList *l;
- char cmd[256];
-
- if (sdi->status != SR_ST_ACTIVE)
- return SR_ERR_DEV_CLOSED;
-
- serial = sdi->conn;
- devc = sdi->priv;
-
- for (l = sdi->probes; l; l = l->next) {
- probe = l->data;
- sr_dbg("handling probe %s", probe->name);
- if (probe->type == SR_PROBE_ANALOG) {
- if (probe->enabled)
- devc->enabled_analog_probes = g_slist_append(
- devc->enabled_analog_probes, probe);
- if (probe->enabled != devc->analog_channels[probe->index]) {
- /* Enabled channel is currently disabled, or vice versa. */
- sprintf(cmd, ":CHAN%d:DISP %s", probe->index + 1,
- probe->enabled ? "ON" : "OFF");
- if (rigol_ds1xx2_send(sdi, cmd) != SR_OK)
- return SR_ERR;
- }
- } else if (probe->type == SR_PROBE_LOGIC) {
- if (probe->enabled)
- devc->enabled_digital_probes = g_slist_append(
- devc->enabled_digital_probes, probe);
- if (probe->enabled != devc->digital_channels[probe->index]) {
- /* Enabled channel is currently disabled, or vice versa. */
- sprintf(cmd, ":DIG%d:TURN %s", probe->index,
- probe->enabled ? "ON" : "OFF");
- if (rigol_ds1xx2_send(sdi, cmd) != SR_OK)
- return SR_ERR;
- }
- }
- }
- if (!devc->enabled_analog_probes && !devc->enabled_digital_probes)
- return SR_ERR;
-
- sr_source_add(serial->fd, G_IO_IN, 50, rigol_ds1xx2_receive, (void *)sdi);
-
- /* Send header packet to the session bus. */
- std_session_send_df_header(cb_data, LOG_PREFIX);
-
- /* Fetch the first frame. */
- if (devc->enabled_analog_probes) {
- devc->channel_frame = devc->enabled_analog_probes->data;
- if (rigol_ds1xx2_send(sdi, ":WAV:DATA? CHAN%d",
- devc->channel_frame->index + 1) != SR_OK)
- return SR_ERR;
- } else {
- devc->channel_frame = devc->enabled_digital_probes->data;
- if (rigol_ds1xx2_send(sdi, ":WAV:DATA? DIG") != SR_OK)
- return SR_ERR;
- }
-
- devc->num_frame_bytes = 0;
-
- return SR_OK;
-}
-
-static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
-{
- struct dev_context *devc;
- struct sr_serial_dev_inst *serial;
-
- (void)cb_data;
-
- devc = sdi->priv;
-
- if (sdi->status != SR_ST_ACTIVE) {
- sr_err("Device inactive, can't stop acquisition.");
- return SR_ERR;
- }
-
- g_slist_free(devc->enabled_analog_probes);
- g_slist_free(devc->enabled_digital_probes);
- devc->enabled_analog_probes = NULL;
- devc->enabled_digital_probes = NULL;
- serial = sdi->conn;
- sr_source_remove(serial->fd);
-
- return SR_OK;
-}
-
-SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info = {
- .name = "rigol-ds1xx2",
- .longname = "Rigol DS1xx2",
- .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,
-};
projects / libsigrok.git / commitdiff