diff options
Diffstat (limited to 'src/devices/usb.cpp')
| -rw-r--r-- | src/devices/usb.cpp | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/src/devices/usb.cpp b/src/devices/usb.cpp new file mode 100644 index 0000000..5042699 --- /dev/null +++ b/src/devices/usb.cpp @@ -0,0 +1,254 @@ +/* + * Copyright 2010, Intel Corporation + * + * This file is part of PowerTOP + * + * This program file 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; version 2 of the License. + * + * 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 in a file named COPYING; if not, write to the + * Free Software Foundation, Inc, + * 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301 USA + * or just google for it. + * + * Authors: + * Arjan van de Ven <arjan@linux.intel.com> + */ +#include "usb.h" + +#include <string.h> +#include <stdio.h> +#include <unistd.h> +#include <sys/types.h> +#include <limits.h> + +#include "../lib.h" +#include "../devlist.h" +#include "../parameters/parameters.h" + +#include <iostream> +#include <fstream> + +usbdevice::usbdevice(const char *_name, const char *path, const char *devid): device() +{ + ifstream file; + char filename[PATH_MAX]; + char vendor[4096]; + char product[4096]; + + pt_strcpy(sysfs_path, path); + register_sysfs_path(sysfs_path); + pt_strcpy(name, _name); + pt_strcpy(devname, devid); + snprintf(humanname, sizeof(humanname), _("USB device: %s"), pretty_print(devid, vendor, 4096)); + active_before = 0; + active_after = 0; + connected_before = 0; + connected_after = 0; + busnum = 0; + devnum = 0; + + index = get_param_index(devname); + r_index = get_result_index(name); + rootport = 0; + cached_valid = 0; + + + /* root ports and hubs should count as 0 power ... their activity is derived */ + snprintf(filename, sizeof(filename), "%s/bDeviceClass", path); + file.open(filename, ios::in); + if (file) { + int dclass = 0; + + file >> dclass; + file.close(); + if (dclass == 9) + rootport = 1; + }; + + vendor[0] = 0; + product[0] = 0; + snprintf(filename, sizeof(filename), "%s/manufacturer", path); + file.open(filename, ios::in); + if (file) { + file.getline(vendor, 2047); + if (strstr(vendor, "Linux ")) + vendor[0] = 0; + file.close(); + }; + snprintf(filename, sizeof(filename), "%s/product", path); + file.open(filename, ios::in); + if (file) { + file.getline(product, 2040); + file.close(); + }; + if (strlen(vendor) && strlen(product)) + snprintf(humanname, sizeof(humanname), _("USB device: %s (%s)"), product, vendor); + else if (strlen(product)) + snprintf(humanname, sizeof(humanname), _("USB device: %s"), product); + else if (strlen(vendor)) + snprintf(humanname, sizeof(humanname), _("USB device: %s"), vendor); + + /* For usbdevfs we need bus number and device number */ + snprintf(filename, sizeof(filename), "%s/busnum", path); + file.open(filename, ios::in); + if (file) { + + file >> busnum; + file.close(); + }; + snprintf(filename, sizeof(filename), "%s/devnum", path); + file.open(filename, ios::in); + if (file) { + + file >> devnum; + file.close(); + }; +} + + + +void usbdevice::start_measurement(void) +{ + ifstream file; + char fullpath[PATH_MAX]; + + active_before = 0; + active_after = 0; + connected_before = 0; + connected_after = 0; + + snprintf(fullpath, sizeof(fullpath), "%s/power/active_duration", sysfs_path); + file.open(fullpath, ios::in); + if (file) { + file >> active_before; + } + file.close(); + + snprintf(fullpath, sizeof(fullpath), "%s/power/connected_duration", sysfs_path); + file.open(fullpath, ios::in); + if (file) { + file >> connected_before; + } + file.close(); +} + +void usbdevice::end_measurement(void) +{ + ifstream file; + char fullpath[PATH_MAX]; + + snprintf(fullpath, sizeof(fullpath), "%s/power/active_duration", sysfs_path); + file.open(fullpath, ios::in); + if (file) { + file >> active_after; + } + file.close(); + + snprintf(fullpath, sizeof(fullpath), "%s/power/connected_duration", sysfs_path); + file.open(fullpath, ios::in); + if (file) { + file >> connected_after; + } + file.close(); + report_utilization(name, utilization()); + +} + +double usbdevice::utilization(void) /* percentage */ +{ + double d; + d = 100.0 * (active_after - active_before) / (0.01 + connected_after - connected_before); + if (d < 0.0) + d = 0.0; + if (d > 99.8) + d = 100.0; + return d; +} + +const char * usbdevice::device_name(void) +{ + return name; +} + +const char * usbdevice::human_name(void) +{ + return humanname; +} + +void usbdevice::register_power_with_devlist(struct result_bundle *results, struct parameter_bundle *bundle) +{ + char devfs_name[1024]; + + snprintf(devfs_name, sizeof(devfs_name), "usb/%03d/%03d", busnum, + devnum); + + register_devpower(devfs_name, power_usage(results, bundle), this); +} + +double usbdevice::power_usage(struct result_bundle *result, struct parameter_bundle *bundle) +{ + double power; + double factor; + double util; + + if (rootport || !cached_valid) + return 0.0; + + + power = 0; + factor = get_parameter_value(index, bundle); + util = get_result_value(r_index, result); + + power += util * factor / 100.0; + + return power; +} + +static void create_all_usb_devices_callback(const char *d_name) +{ + char filename[PATH_MAX]; + ifstream file; + class usbdevice *usb; + char device_name[PATH_MAX]; + char vendorid[64], devid[64]; + char devid_name[4096]; + + snprintf(filename, sizeof(filename), "/sys/bus/usb/devices/%s", d_name); + snprintf(device_name, sizeof(device_name), "%s/power/active_duration", filename); + if (access(device_name, R_OK) != 0) + return; + + snprintf(device_name, sizeof(device_name), "%s/idVendor", filename); + file.open(device_name, ios::in); + if (file) + file.getline(vendorid, 64); + file.close(); + snprintf(device_name, sizeof(device_name), "%s/idProduct", filename); + file.open(device_name, ios::in); + if (file) + file.getline(devid, 64); + file.close(); + + snprintf(devid_name, sizeof(devid_name), "usb-device-%s-%s", vendorid, devid); + snprintf(device_name, sizeof(device_name), "usb-device-%s-%s-%s", d_name, vendorid, devid); + if (result_device_exists(device_name)) + return; + + usb = new class usbdevice(device_name, filename, devid_name); + all_devices.push_back(usb); + register_parameter(devid_name, 0.1); +} + +void create_all_usb_devices(void) +{ + process_directory("/sys/bus/usb/devices/", create_all_usb_devices_callback); +} |