11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * devices.c 31da177e4SLinus Torvalds * (C) Copyright 1999 Randy Dunlap. 444526f91SCarlos Sánchez Acosta * (C) Copyright 1999,2000 Thomas Sailer <sailer@ife.ee.ethz.ch>. 544526f91SCarlos Sánchez Acosta * (proc file per device) 61da177e4SLinus Torvalds * (C) Copyright 1999 Deti Fliegl (new USB architecture) 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 91da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 101da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 111da177e4SLinus Torvalds * (at your option) any later version. 121da177e4SLinus Torvalds * 131da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 141da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 151da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 161da177e4SLinus Torvalds * GNU General Public License for more details. 171da177e4SLinus Torvalds * 181da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 191da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 201da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 211da177e4SLinus Torvalds * 221da177e4SLinus Torvalds ************************************************************* 231da177e4SLinus Torvalds * 241da177e4SLinus Torvalds * <mountpoint>/devices contains USB topology, device, config, class, 251da177e4SLinus Torvalds * interface, & endpoint data. 261da177e4SLinus Torvalds * 271da177e4SLinus Torvalds * I considered using /proc/bus/usb/devices/device# for each device 281da177e4SLinus Torvalds * as it is attached or detached, but I didn't like this for some 291da177e4SLinus Torvalds * reason -- maybe it's just too deep of a directory structure. 301da177e4SLinus Torvalds * I also don't like looking in multiple places to gather and view 311da177e4SLinus Torvalds * the data. Having only one file for ./devices also prevents race 321da177e4SLinus Torvalds * conditions that could arise if a program was reading device info 331da177e4SLinus Torvalds * for devices that are being removed (unplugged). (That is, the 341da177e4SLinus Torvalds * program may find a directory for devnum_12 then try to open it, 351da177e4SLinus Torvalds * but it was just unplugged, so the directory is now deleted. 361da177e4SLinus Torvalds * But programs would just have to be prepared for situations like 371da177e4SLinus Torvalds * this in any plug-and-play environment.) 381da177e4SLinus Torvalds * 391da177e4SLinus Torvalds * 1999-12-16: Thomas Sailer <sailer@ife.ee.ethz.ch> 401da177e4SLinus Torvalds * Converted the whole proc stuff to real 411da177e4SLinus Torvalds * read methods. Now not the whole device list needs to fit 421da177e4SLinus Torvalds * into one page, only the device list for one bus. 431da177e4SLinus Torvalds * Added a poll method to /proc/bus/usb/devices, to wake 441da177e4SLinus Torvalds * up an eventual usbd 451da177e4SLinus Torvalds * 2000-01-04: Thomas Sailer <sailer@ife.ee.ethz.ch> 461da177e4SLinus Torvalds * Turned into its own filesystem 471da177e4SLinus Torvalds * 2000-07-05: Ashley Montanaro <ashley@compsoc.man.ac.uk> 481da177e4SLinus Torvalds * Converted file reading routine to dump to buffer once 491da177e4SLinus Torvalds * per device, not per bus 501da177e4SLinus Torvalds */ 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds #include <linux/fs.h> 531da177e4SLinus Torvalds #include <linux/mm.h> 545a0e3ad6STejun Heo #include <linux/gfp.h> 551da177e4SLinus Torvalds #include <linux/poll.h> 561da177e4SLinus Torvalds #include <linux/usb.h> 571da177e4SLinus Torvalds #include <linux/usbdevice_fs.h> 5827729aadSEric Lescouet #include <linux/usb/hcd.h> 594186ecf8SArjan van de Ven #include <linux/mutex.h> 6044526f91SCarlos Sánchez Acosta #include <linux/uaccess.h> 611da177e4SLinus Torvalds 626d5e8254SGreg KH #include "usb.h" 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds /* Define ALLOW_SERIAL_NUMBER if you want to see the serial number of devices */ 651da177e4SLinus Torvalds #define ALLOW_SERIAL_NUMBER 661da177e4SLinus Torvalds 67bce1a702SDmitry Torokhov static const char format_topo[] = 68834e2312SAlan Stern /* T: Bus=dd Lev=dd Prnt=dd Port=dd Cnt=dd Dev#=ddd Spd=dddd MxCh=dd */ 69834e2312SAlan Stern "\nT: Bus=%2.2d Lev=%2.2d Prnt=%2.2d Port=%2.2d Cnt=%2.2d Dev#=%3d Spd=%-4s MxCh=%2d\n"; 701da177e4SLinus Torvalds 71bce1a702SDmitry Torokhov static const char format_string_manufacturer[] = 721da177e4SLinus Torvalds /* S: Manufacturer=xxxx */ 731da177e4SLinus Torvalds "S: Manufacturer=%.100s\n"; 741da177e4SLinus Torvalds 75bce1a702SDmitry Torokhov static const char format_string_product[] = 761da177e4SLinus Torvalds /* S: Product=xxxx */ 771da177e4SLinus Torvalds "S: Product=%.100s\n"; 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds #ifdef ALLOW_SERIAL_NUMBER 80bce1a702SDmitry Torokhov static const char format_string_serialnumber[] = 811da177e4SLinus Torvalds /* S: SerialNumber=xxxx */ 821da177e4SLinus Torvalds "S: SerialNumber=%.100s\n"; 831da177e4SLinus Torvalds #endif 841da177e4SLinus Torvalds 85bce1a702SDmitry Torokhov static const char format_bandwidth[] = 861da177e4SLinus Torvalds /* B: Alloc=ddd/ddd us (xx%), #Int=ddd, #Iso=ddd */ 871da177e4SLinus Torvalds "B: Alloc=%3d/%3d us (%2d%%), #Int=%3d, #Iso=%3d\n"; 881da177e4SLinus Torvalds 89bce1a702SDmitry Torokhov static const char format_device1[] = 901da177e4SLinus Torvalds /* D: Ver=xx.xx Cls=xx(sssss) Sub=xx Prot=xx MxPS=dd #Cfgs=dd */ 911da177e4SLinus Torvalds "D: Ver=%2x.%02x Cls=%02x(%-5s) Sub=%02x Prot=%02x MxPS=%2d #Cfgs=%3d\n"; 921da177e4SLinus Torvalds 93bce1a702SDmitry Torokhov static const char format_device2[] = 941da177e4SLinus Torvalds /* P: Vendor=xxxx ProdID=xxxx Rev=xx.xx */ 951da177e4SLinus Torvalds "P: Vendor=%04x ProdID=%04x Rev=%2x.%02x\n"; 961da177e4SLinus Torvalds 97bce1a702SDmitry Torokhov static const char format_config[] = 981da177e4SLinus Torvalds /* C: #Ifs=dd Cfg#=dd Atr=xx MPwr=dddmA */ 991da177e4SLinus Torvalds "C:%c #Ifs=%2d Cfg#=%2d Atr=%02x MxPwr=%3dmA\n"; 1001da177e4SLinus Torvalds 101bce1a702SDmitry Torokhov static const char format_iad[] = 102165fe97eSCraig W. Nadler /* A: FirstIf#=dd IfCount=dd Cls=xx(sssss) Sub=xx Prot=xx */ 103165fe97eSCraig W. Nadler "A: FirstIf#=%2d IfCount=%2d Cls=%02x(%-5s) Sub=%02x Prot=%02x\n"; 104165fe97eSCraig W. Nadler 105bce1a702SDmitry Torokhov static const char format_iface[] = 1061da177e4SLinus Torvalds /* I: If#=dd Alt=dd #EPs=dd Cls=xx(sssss) Sub=xx Prot=xx Driver=xxxx*/ 1072360e4aaSDavid Brownell "I:%c If#=%2d Alt=%2d #EPs=%2d Cls=%02x(%-5s) Sub=%02x Prot=%02x Driver=%s\n"; 1081da177e4SLinus Torvalds 109bce1a702SDmitry Torokhov static const char format_endpt[] = 1101da177e4SLinus Torvalds /* E: Ad=xx(s) Atr=xx(ssss) MxPS=dddd Ivl=D?s */ 1111da177e4SLinus Torvalds "E: Ad=%02x(%c) Atr=%02x(%-4s) MxPS=%4d Ivl=%d%cs\n"; 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds /* 1151da177e4SLinus Torvalds * Need access to the driver and USB bus lists. 1161da177e4SLinus Torvalds * extern struct list_head usb_bus_list; 1171da177e4SLinus Torvalds * However, these will come from functions that return ptrs to each of them. 1181da177e4SLinus Torvalds */ 1191da177e4SLinus Torvalds 1207bc80cd9SLinus Torvalds /* 1217bc80cd9SLinus Torvalds * Wait for an connect/disconnect event to happen. We initialize 1227bc80cd9SLinus Torvalds * the event counter with an odd number, and each event will increment 1237bc80cd9SLinus Torvalds * the event counter by two, so it will always _stay_ odd. That means 1247bc80cd9SLinus Torvalds * that it will never be zero, so "event 0" will never match a current 1257bc80cd9SLinus Torvalds * event, and thus 'poll' will always trigger as readable for the first 1267bc80cd9SLinus Torvalds * time it gets called. 1277bc80cd9SLinus Torvalds */ 1287bc80cd9SLinus Torvalds static struct device_connect_event { 1297bc80cd9SLinus Torvalds atomic_t count; 1307bc80cd9SLinus Torvalds wait_queue_head_t wait; 1317bc80cd9SLinus Torvalds } device_event = { 1327bc80cd9SLinus Torvalds .count = ATOMIC_INIT(1), 1337bc80cd9SLinus Torvalds .wait = __WAIT_QUEUE_HEAD_INITIALIZER(device_event.wait) 1347bc80cd9SLinus Torvalds }; 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds struct class_info { 1371da177e4SLinus Torvalds int class; 1381da177e4SLinus Torvalds char *class_name; 1391da177e4SLinus Torvalds }; 1401da177e4SLinus Torvalds 14144526f91SCarlos Sánchez Acosta static const struct class_info clas_info[] = { 14244526f91SCarlos Sánchez Acosta /* max. 5 chars. per name string */ 1431da177e4SLinus Torvalds {USB_CLASS_PER_INTERFACE, ">ifc"}, 1441da177e4SLinus Torvalds {USB_CLASS_AUDIO, "audio"}, 1451da177e4SLinus Torvalds {USB_CLASS_COMM, "comm."}, 1461da177e4SLinus Torvalds {USB_CLASS_HID, "HID"}, 1471da177e4SLinus Torvalds {USB_CLASS_PHYSICAL, "PID"}, 148bf7fbb02SFrans Pop {USB_CLASS_STILL_IMAGE, "still"}, 1491da177e4SLinus Torvalds {USB_CLASS_PRINTER, "print"}, 1501da177e4SLinus Torvalds {USB_CLASS_MASS_STORAGE, "stor."}, 151bf7fbb02SFrans Pop {USB_CLASS_HUB, "hub"}, 1521da177e4SLinus Torvalds {USB_CLASS_CDC_DATA, "data"}, 1531da177e4SLinus Torvalds {USB_CLASS_CSCID, "scard"}, 1541da177e4SLinus Torvalds {USB_CLASS_CONTENT_SEC, "c-sec"}, 155165fe97eSCraig W. Nadler {USB_CLASS_VIDEO, "video"}, 156bf7fbb02SFrans Pop {USB_CLASS_WIRELESS_CONTROLLER, "wlcon"}, 157bf7fbb02SFrans Pop {USB_CLASS_MISC, "misc"}, 158bf7fbb02SFrans Pop {USB_CLASS_APP_SPEC, "app."}, 159bf7fbb02SFrans Pop {USB_CLASS_VENDOR_SPEC, "vend."}, 1601da177e4SLinus Torvalds {-1, "unk."} /* leave as last */ 1611da177e4SLinus Torvalds }; 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds /*****************************************************************/ 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds void usbfs_conn_disc_event(void) 1661da177e4SLinus Torvalds { 1677bc80cd9SLinus Torvalds atomic_add(2, &device_event.count); 1687bc80cd9SLinus Torvalds wake_up(&device_event.wait); 1691da177e4SLinus Torvalds } 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds static const char *class_decode(const int class) 1721da177e4SLinus Torvalds { 1731da177e4SLinus Torvalds int ix; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds for (ix = 0; clas_info[ix].class != -1; ix++) 1761da177e4SLinus Torvalds if (clas_info[ix].class == class) 1771da177e4SLinus Torvalds break; 1781a68f71dSOliver Neukum return clas_info[ix].class_name; 1791da177e4SLinus Torvalds } 1801da177e4SLinus Torvalds 181376c0d3fSGreg Kroah-Hartman static char *usb_dump_endpoint_descriptor(int speed, char *start, char *end, 182376c0d3fSGreg Kroah-Hartman const struct usb_endpoint_descriptor *desc) 1831da177e4SLinus Torvalds { 1841da177e4SLinus Torvalds char dir, unit, *type; 18587ad46c9SLuiz Fernando N. Capitulino unsigned interval, bandwidth = 1; 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds if (start > end) 1881da177e4SLinus Torvalds return start; 18987ad46c9SLuiz Fernando N. Capitulino 19087ad46c9SLuiz Fernando N. Capitulino dir = usb_endpoint_dir_in(desc) ? 'I' : 'O'; 19187ad46c9SLuiz Fernando N. Capitulino 1921da177e4SLinus Torvalds if (speed == USB_SPEED_HIGH) { 19329cc8897SKuninori Morimoto switch (usb_endpoint_maxp(desc) & (0x03 << 11)) { 19444526f91SCarlos Sánchez Acosta case 1 << 11: 19544526f91SCarlos Sánchez Acosta bandwidth = 2; break; 19644526f91SCarlos Sánchez Acosta case 2 << 11: 19744526f91SCarlos Sánchez Acosta bandwidth = 3; break; 1981da177e4SLinus Torvalds } 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds /* this isn't checking for illegal values */ 2022e0fe709SJulia Lawall switch (usb_endpoint_type(desc)) { 2031da177e4SLinus Torvalds case USB_ENDPOINT_XFER_CONTROL: 2041da177e4SLinus Torvalds type = "Ctrl"; 2051da177e4SLinus Torvalds if (speed == USB_SPEED_HIGH) /* uframes per NAK */ 2061da177e4SLinus Torvalds interval = desc->bInterval; 2071da177e4SLinus Torvalds else 2081da177e4SLinus Torvalds interval = 0; 2091da177e4SLinus Torvalds dir = 'B'; /* ctrl is bidirectional */ 2101da177e4SLinus Torvalds break; 2111da177e4SLinus Torvalds case USB_ENDPOINT_XFER_ISOC: 2121da177e4SLinus Torvalds type = "Isoc"; 2131da177e4SLinus Torvalds interval = 1 << (desc->bInterval - 1); 2141da177e4SLinus Torvalds break; 2151da177e4SLinus Torvalds case USB_ENDPOINT_XFER_BULK: 2161da177e4SLinus Torvalds type = "Bulk"; 21787ad46c9SLuiz Fernando N. Capitulino if (speed == USB_SPEED_HIGH && dir == 'O') /* uframes per NAK */ 2181da177e4SLinus Torvalds interval = desc->bInterval; 2191da177e4SLinus Torvalds else 2201da177e4SLinus Torvalds interval = 0; 2211da177e4SLinus Torvalds break; 2221da177e4SLinus Torvalds case USB_ENDPOINT_XFER_INT: 2231da177e4SLinus Torvalds type = "Int."; 2242868a2b1SDmitry Torokhov if (speed == USB_SPEED_HIGH || speed == USB_SPEED_SUPER) 2251da177e4SLinus Torvalds interval = 1 << (desc->bInterval - 1); 2261a68f71dSOliver Neukum else 2271da177e4SLinus Torvalds interval = desc->bInterval; 2281da177e4SLinus Torvalds break; 2291da177e4SLinus Torvalds default: /* "can't happen" */ 2301da177e4SLinus Torvalds return start; 2311da177e4SLinus Torvalds } 2322868a2b1SDmitry Torokhov interval *= (speed == USB_SPEED_HIGH || 2332868a2b1SDmitry Torokhov speed == USB_SPEED_SUPER) ? 125 : 1000; 2341da177e4SLinus Torvalds if (interval % 1000) 2351da177e4SLinus Torvalds unit = 'u'; 2361da177e4SLinus Torvalds else { 2371da177e4SLinus Torvalds unit = 'm'; 2381da177e4SLinus Torvalds interval /= 1000; 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds start += sprintf(start, format_endpt, desc->bEndpointAddress, dir, 2421da177e4SLinus Torvalds desc->bmAttributes, type, 24329cc8897SKuninori Morimoto (usb_endpoint_maxp(desc) & 0x07ff) * 244376c0d3fSGreg Kroah-Hartman bandwidth, 2451da177e4SLinus Torvalds interval, unit); 2461da177e4SLinus Torvalds return start; 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds 2491da177e4SLinus Torvalds static char *usb_dump_interface_descriptor(char *start, char *end, 2501da177e4SLinus Torvalds const struct usb_interface_cache *intfc, 2511da177e4SLinus Torvalds const struct usb_interface *iface, 2521da177e4SLinus Torvalds int setno) 2531da177e4SLinus Torvalds { 254376c0d3fSGreg Kroah-Hartman const struct usb_interface_descriptor *desc; 2558d790d74SDmitry Torokhov const char *driver_name = ""; 2562360e4aaSDavid Brownell int active = 0; 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds if (start > end) 2591da177e4SLinus Torvalds return start; 260376c0d3fSGreg Kroah-Hartman desc = &intfc->altsetting[setno].desc; 2612360e4aaSDavid Brownell if (iface) { 2621da177e4SLinus Torvalds driver_name = (iface->dev.driver 2631da177e4SLinus Torvalds ? iface->dev.driver->name 2641da177e4SLinus Torvalds : "(none)"); 2652360e4aaSDavid Brownell active = (desc == &iface->cur_altsetting->desc); 2662360e4aaSDavid Brownell } 2671da177e4SLinus Torvalds start += sprintf(start, format_iface, 2682360e4aaSDavid Brownell active ? '*' : ' ', /* mark active altsetting */ 2691da177e4SLinus Torvalds desc->bInterfaceNumber, 2701da177e4SLinus Torvalds desc->bAlternateSetting, 2711da177e4SLinus Torvalds desc->bNumEndpoints, 2721da177e4SLinus Torvalds desc->bInterfaceClass, 2731da177e4SLinus Torvalds class_decode(desc->bInterfaceClass), 2741da177e4SLinus Torvalds desc->bInterfaceSubClass, 2751da177e4SLinus Torvalds desc->bInterfaceProtocol, 2761da177e4SLinus Torvalds driver_name); 2771da177e4SLinus Torvalds return start; 2781da177e4SLinus Torvalds } 2791da177e4SLinus Torvalds 280376c0d3fSGreg Kroah-Hartman static char *usb_dump_interface(int speed, char *start, char *end, 2811da177e4SLinus Torvalds const struct usb_interface_cache *intfc, 282376c0d3fSGreg Kroah-Hartman const struct usb_interface *iface, int setno) 283376c0d3fSGreg Kroah-Hartman { 2841da177e4SLinus Torvalds const struct usb_host_interface *desc = &intfc->altsetting[setno]; 2851da177e4SLinus Torvalds int i; 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds start = usb_dump_interface_descriptor(start, end, intfc, iface, setno); 2881da177e4SLinus Torvalds for (i = 0; i < desc->desc.bNumEndpoints; i++) { 2891da177e4SLinus Torvalds if (start > end) 2901da177e4SLinus Torvalds return start; 2911da177e4SLinus Torvalds start = usb_dump_endpoint_descriptor(speed, 2921da177e4SLinus Torvalds start, end, &desc->endpoint[i].desc); 2931da177e4SLinus Torvalds } 2941da177e4SLinus Torvalds return start; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds 297165fe97eSCraig W. Nadler static char *usb_dump_iad_descriptor(char *start, char *end, 298165fe97eSCraig W. Nadler const struct usb_interface_assoc_descriptor *iad) 299165fe97eSCraig W. Nadler { 300165fe97eSCraig W. Nadler if (start > end) 301165fe97eSCraig W. Nadler return start; 302165fe97eSCraig W. Nadler start += sprintf(start, format_iad, 303165fe97eSCraig W. Nadler iad->bFirstInterface, 304165fe97eSCraig W. Nadler iad->bInterfaceCount, 305165fe97eSCraig W. Nadler iad->bFunctionClass, 306165fe97eSCraig W. Nadler class_decode(iad->bFunctionClass), 307165fe97eSCraig W. Nadler iad->bFunctionSubClass, 308165fe97eSCraig W. Nadler iad->bFunctionProtocol); 309165fe97eSCraig W. Nadler return start; 310165fe97eSCraig W. Nadler } 311165fe97eSCraig W. Nadler 3121da177e4SLinus Torvalds /* TBD: 3131da177e4SLinus Torvalds * 0. TBDs 3141da177e4SLinus Torvalds * 1. marking active interface altsettings (code lists all, but should mark 3151da177e4SLinus Torvalds * which ones are active, if any) 3161da177e4SLinus Torvalds */ 317376c0d3fSGreg Kroah-Hartman static char *usb_dump_config_descriptor(char *start, char *end, 318376c0d3fSGreg Kroah-Hartman const struct usb_config_descriptor *desc, 319376c0d3fSGreg Kroah-Hartman int active) 3201da177e4SLinus Torvalds { 3211da177e4SLinus Torvalds if (start > end) 3221da177e4SLinus Torvalds return start; 3231da177e4SLinus Torvalds start += sprintf(start, format_config, 324376c0d3fSGreg Kroah-Hartman /* mark active/actual/current cfg. */ 325376c0d3fSGreg Kroah-Hartman active ? '*' : ' ', 3261da177e4SLinus Torvalds desc->bNumInterfaces, 3271da177e4SLinus Torvalds desc->bConfigurationValue, 3281da177e4SLinus Torvalds desc->bmAttributes, 3291da177e4SLinus Torvalds desc->bMaxPower * 2); 3301da177e4SLinus Torvalds return start; 3311da177e4SLinus Torvalds } 3321da177e4SLinus Torvalds 333376c0d3fSGreg Kroah-Hartman static char *usb_dump_config(int speed, char *start, char *end, 334376c0d3fSGreg Kroah-Hartman const struct usb_host_config *config, int active) 3351da177e4SLinus Torvalds { 3361da177e4SLinus Torvalds int i, j; 3371da177e4SLinus Torvalds struct usb_interface_cache *intfc; 3381da177e4SLinus Torvalds struct usb_interface *interface; 3391da177e4SLinus Torvalds 3401da177e4SLinus Torvalds if (start > end) 3411da177e4SLinus Torvalds return start; 342376c0d3fSGreg Kroah-Hartman if (!config) 343376c0d3fSGreg Kroah-Hartman /* getting these some in 2.3.7; none in 2.3.6 */ 3441da177e4SLinus Torvalds return start + sprintf(start, "(null Cfg. desc.)\n"); 3451da177e4SLinus Torvalds start = usb_dump_config_descriptor(start, end, &config->desc, active); 346165fe97eSCraig W. Nadler for (i = 0; i < USB_MAXIADS; i++) { 347165fe97eSCraig W. Nadler if (config->intf_assoc[i] == NULL) 348165fe97eSCraig W. Nadler break; 349165fe97eSCraig W. Nadler start = usb_dump_iad_descriptor(start, end, 350165fe97eSCraig W. Nadler config->intf_assoc[i]); 351165fe97eSCraig W. Nadler } 3521da177e4SLinus Torvalds for (i = 0; i < config->desc.bNumInterfaces; i++) { 3531da177e4SLinus Torvalds intfc = config->intf_cache[i]; 3541da177e4SLinus Torvalds interface = config->interface[i]; 3551da177e4SLinus Torvalds for (j = 0; j < intfc->num_altsetting; j++) { 3561da177e4SLinus Torvalds if (start > end) 3571da177e4SLinus Torvalds return start; 3581da177e4SLinus Torvalds start = usb_dump_interface(speed, 3591da177e4SLinus Torvalds start, end, intfc, interface, j); 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds } 3621da177e4SLinus Torvalds return start; 3631da177e4SLinus Torvalds } 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds /* 3661da177e4SLinus Torvalds * Dump the different USB descriptors. 3671da177e4SLinus Torvalds */ 368376c0d3fSGreg Kroah-Hartman static char *usb_dump_device_descriptor(char *start, char *end, 369376c0d3fSGreg Kroah-Hartman const struct usb_device_descriptor *desc) 3701da177e4SLinus Torvalds { 3711da177e4SLinus Torvalds u16 bcdUSB = le16_to_cpu(desc->bcdUSB); 3721da177e4SLinus Torvalds u16 bcdDevice = le16_to_cpu(desc->bcdDevice); 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds if (start > end) 3751da177e4SLinus Torvalds return start; 3761da177e4SLinus Torvalds start += sprintf(start, format_device1, 3771da177e4SLinus Torvalds bcdUSB >> 8, bcdUSB & 0xff, 3781da177e4SLinus Torvalds desc->bDeviceClass, 3791da177e4SLinus Torvalds class_decode(desc->bDeviceClass), 3801da177e4SLinus Torvalds desc->bDeviceSubClass, 3811da177e4SLinus Torvalds desc->bDeviceProtocol, 3821da177e4SLinus Torvalds desc->bMaxPacketSize0, 3831da177e4SLinus Torvalds desc->bNumConfigurations); 3841da177e4SLinus Torvalds if (start > end) 3851da177e4SLinus Torvalds return start; 3861da177e4SLinus Torvalds start += sprintf(start, format_device2, 3871da177e4SLinus Torvalds le16_to_cpu(desc->idVendor), 3881da177e4SLinus Torvalds le16_to_cpu(desc->idProduct), 3891da177e4SLinus Torvalds bcdDevice >> 8, bcdDevice & 0xff); 3901da177e4SLinus Torvalds return start; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds /* 3941da177e4SLinus Torvalds * Dump the different strings that this device holds. 3951da177e4SLinus Torvalds */ 396376c0d3fSGreg Kroah-Hartman static char *usb_dump_device_strings(char *start, char *end, 397376c0d3fSGreg Kroah-Hartman struct usb_device *dev) 3981da177e4SLinus Torvalds { 3991da177e4SLinus Torvalds if (start > end) 4001da177e4SLinus Torvalds return start; 4011da177e4SLinus Torvalds if (dev->manufacturer) 402376c0d3fSGreg Kroah-Hartman start += sprintf(start, format_string_manufacturer, 403376c0d3fSGreg Kroah-Hartman dev->manufacturer); 4041da177e4SLinus Torvalds if (start > end) 4051da177e4SLinus Torvalds goto out; 4061da177e4SLinus Torvalds if (dev->product) 4071da177e4SLinus Torvalds start += sprintf(start, format_string_product, dev->product); 4081da177e4SLinus Torvalds if (start > end) 4091da177e4SLinus Torvalds goto out; 4101da177e4SLinus Torvalds #ifdef ALLOW_SERIAL_NUMBER 4111da177e4SLinus Torvalds if (dev->serial) 412376c0d3fSGreg Kroah-Hartman start += sprintf(start, format_string_serialnumber, 413376c0d3fSGreg Kroah-Hartman dev->serial); 4141da177e4SLinus Torvalds #endif 4151da177e4SLinus Torvalds out: 4161da177e4SLinus Torvalds return start; 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds static char *usb_dump_desc(char *start, char *end, struct usb_device *dev) 4201da177e4SLinus Torvalds { 4211da177e4SLinus Torvalds int i; 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds if (start > end) 4241da177e4SLinus Torvalds return start; 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds start = usb_dump_device_descriptor(start, end, &dev->descriptor); 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds if (start > end) 4291da177e4SLinus Torvalds return start; 4301da177e4SLinus Torvalds 4311da177e4SLinus Torvalds start = usb_dump_device_strings(start, end, dev); 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds for (i = 0; i < dev->descriptor.bNumConfigurations; i++) { 4341da177e4SLinus Torvalds if (start > end) 4351da177e4SLinus Torvalds return start; 4361da177e4SLinus Torvalds start = usb_dump_config(dev->speed, 4371da177e4SLinus Torvalds start, end, dev->config + i, 4381da177e4SLinus Torvalds /* active ? */ 4391da177e4SLinus Torvalds (dev->config + i) == dev->actconfig); 4401da177e4SLinus Torvalds } 4411da177e4SLinus Torvalds return start; 4421da177e4SLinus Torvalds } 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds #ifdef PROC_EXTRA /* TBD: may want to add this code later */ 4461da177e4SLinus Torvalds 447376c0d3fSGreg Kroah-Hartman static char *usb_dump_hub_descriptor(char *start, char *end, 448376c0d3fSGreg Kroah-Hartman const struct usb_hub_descriptor *desc) 4491da177e4SLinus Torvalds { 4501da177e4SLinus Torvalds int leng = USB_DT_HUB_NONVAR_SIZE; 4511da177e4SLinus Torvalds unsigned char *ptr = (unsigned char *)desc; 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds if (start > end) 4541da177e4SLinus Torvalds return start; 4551da177e4SLinus Torvalds start += sprintf(start, "Interface:"); 4561da177e4SLinus Torvalds while (leng && start <= end) { 4571da177e4SLinus Torvalds start += sprintf(start, " %02x", *ptr); 4581da177e4SLinus Torvalds ptr++; leng--; 4591da177e4SLinus Torvalds } 4601da177e4SLinus Torvalds *start++ = '\n'; 4611da177e4SLinus Torvalds return start; 4621da177e4SLinus Torvalds } 4631da177e4SLinus Torvalds 464376c0d3fSGreg Kroah-Hartman static char *usb_dump_string(char *start, char *end, 465376c0d3fSGreg Kroah-Hartman const struct usb_device *dev, char *id, int index) 4661da177e4SLinus Torvalds { 4671da177e4SLinus Torvalds if (start > end) 4681da177e4SLinus Torvalds return start; 4691da177e4SLinus Torvalds start += sprintf(start, "Interface:"); 470376c0d3fSGreg Kroah-Hartman if (index <= dev->maxstring && dev->stringindex && 471376c0d3fSGreg Kroah-Hartman dev->stringindex[index]) 472376c0d3fSGreg Kroah-Hartman start += sprintf(start, "%s: %.100s ", id, 473376c0d3fSGreg Kroah-Hartman dev->stringindex[index]); 4741da177e4SLinus Torvalds return start; 4751da177e4SLinus Torvalds } 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds #endif /* PROC_EXTRA */ 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds /*****************************************************************/ 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds /* This is a recursive function. Parameters: 4821da177e4SLinus Torvalds * buffer - the user-space buffer to write data into 4831da177e4SLinus Torvalds * nbytes - the maximum number of bytes to write 4841da177e4SLinus Torvalds * skip_bytes - the number of bytes to skip before writing anything 4851da177e4SLinus Torvalds * file_offset - the offset into the devices file on completion 4861da177e4SLinus Torvalds * The caller must own the device lock. 4871da177e4SLinus Torvalds */ 488376c0d3fSGreg Kroah-Hartman static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes, 489376c0d3fSGreg Kroah-Hartman loff_t *skip_bytes, loff_t *file_offset, 490376c0d3fSGreg Kroah-Hartman struct usb_device *usbdev, struct usb_bus *bus, 491376c0d3fSGreg Kroah-Hartman int level, int index, int count) 4921da177e4SLinus Torvalds { 4931da177e4SLinus Torvalds int chix; 4941da177e4SLinus Torvalds int ret, cnt = 0; 4951da177e4SLinus Torvalds int parent_devnum = 0; 4961da177e4SLinus Torvalds char *pages_start, *data_end, *speed; 4971da177e4SLinus Torvalds unsigned int length; 4981da177e4SLinus Torvalds ssize_t total_written = 0; 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds /* don't bother with anything else if we're not writing any data */ 5011da177e4SLinus Torvalds if (*nbytes <= 0) 5021da177e4SLinus Torvalds return 0; 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds if (level > MAX_TOPO_LEVEL) 5051da177e4SLinus Torvalds return 0; 506376c0d3fSGreg Kroah-Hartman /* allocate 2^1 pages = 8K (on i386); 507376c0d3fSGreg Kroah-Hartman * should be more than enough for one device */ 508acbe2febSOliver Neukum pages_start = (char *)__get_free_pages(GFP_NOIO, 1); 509376c0d3fSGreg Kroah-Hartman if (!pages_start) 5101da177e4SLinus Torvalds return -ENOMEM; 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds if (usbdev->parent && usbdev->parent->devnum != -1) 5131da177e4SLinus Torvalds parent_devnum = usbdev->parent->devnum; 5141da177e4SLinus Torvalds /* 5151da177e4SLinus Torvalds * So the root hub's parent is 0 and any device that is 5161da177e4SLinus Torvalds * plugged into the root hub has a parent of 0. 5171da177e4SLinus Torvalds */ 5181da177e4SLinus Torvalds switch (usbdev->speed) { 5191da177e4SLinus Torvalds case USB_SPEED_LOW: 5201da177e4SLinus Torvalds speed = "1.5"; break; 5211da177e4SLinus Torvalds case USB_SPEED_UNKNOWN: /* usb 1.1 root hub code */ 5221da177e4SLinus Torvalds case USB_SPEED_FULL: 5231da177e4SLinus Torvalds speed = "12"; break; 524834e2312SAlan Stern case USB_SPEED_WIRELESS: /* Wireless has no real fixed speed */ 5251da177e4SLinus Torvalds case USB_SPEED_HIGH: 5261da177e4SLinus Torvalds speed = "480"; break; 527834e2312SAlan Stern case USB_SPEED_SUPER: 528834e2312SAlan Stern speed = "5000"; break; 5291da177e4SLinus Torvalds default: 5301da177e4SLinus Torvalds speed = "??"; 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds data_end = pages_start + sprintf(pages_start, format_topo, 5331da177e4SLinus Torvalds bus->busnum, level, parent_devnum, 5341da177e4SLinus Torvalds index, count, usbdev->devnum, 5351da177e4SLinus Torvalds speed, usbdev->maxchild); 5361da177e4SLinus Torvalds /* 5371da177e4SLinus Torvalds * level = topology-tier level; 5381da177e4SLinus Torvalds * parent_devnum = parent device number; 5391da177e4SLinus Torvalds * index = parent's connector number; 5401da177e4SLinus Torvalds * count = device count at this level 5411da177e4SLinus Torvalds */ 5421da177e4SLinus Torvalds /* If this is the root hub, display the bandwidth information */ 5431da177e4SLinus Torvalds if (level == 0) { 5441da177e4SLinus Torvalds int max; 5451da177e4SLinus Torvalds 5462868a2b1SDmitry Torokhov /* super/high speed reserves 80%, full/low reserves 90% */ 5472868a2b1SDmitry Torokhov if (usbdev->speed == USB_SPEED_HIGH || 5482868a2b1SDmitry Torokhov usbdev->speed == USB_SPEED_SUPER) 5491da177e4SLinus Torvalds max = 800; 5501da177e4SLinus Torvalds else 5511da177e4SLinus Torvalds max = FRAME_TIME_MAX_USECS_ALLOC; 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds /* report "average" periodic allocation over a microsecond. 5541da177e4SLinus Torvalds * the schedules are actually bursty, HCDs need to deal with 5551da177e4SLinus Torvalds * that and just compute/report this average. 5561da177e4SLinus Torvalds */ 5571da177e4SLinus Torvalds data_end += sprintf(data_end, format_bandwidth, 5581da177e4SLinus Torvalds bus->bandwidth_allocated, max, 5591da177e4SLinus Torvalds (100 * bus->bandwidth_allocated + max / 2) 5601da177e4SLinus Torvalds / max, 5611da177e4SLinus Torvalds bus->bandwidth_int_reqs, 5621da177e4SLinus Torvalds bus->bandwidth_isoc_reqs); 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds } 565376c0d3fSGreg Kroah-Hartman data_end = usb_dump_desc(data_end, pages_start + (2 * PAGE_SIZE) - 256, 566376c0d3fSGreg Kroah-Hartman usbdev); 5671da177e4SLinus Torvalds 5681da177e4SLinus Torvalds if (data_end > (pages_start + (2 * PAGE_SIZE) - 256)) 5691da177e4SLinus Torvalds data_end += sprintf(data_end, "(truncated)\n"); 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds length = data_end - pages_start; 5721da177e4SLinus Torvalds /* if we can start copying some data to the user */ 5731da177e4SLinus Torvalds if (length > *skip_bytes) { 5741da177e4SLinus Torvalds length -= *skip_bytes; 5751da177e4SLinus Torvalds if (length > *nbytes) 5761da177e4SLinus Torvalds length = *nbytes; 5771da177e4SLinus Torvalds if (copy_to_user(*buffer, pages_start + *skip_bytes, length)) { 5781da177e4SLinus Torvalds free_pages((unsigned long)pages_start, 1); 5791da177e4SLinus Torvalds return -EFAULT; 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds *nbytes -= length; 5821da177e4SLinus Torvalds *file_offset += length; 5831da177e4SLinus Torvalds total_written += length; 5841da177e4SLinus Torvalds *buffer += length; 5851da177e4SLinus Torvalds *skip_bytes = 0; 5861da177e4SLinus Torvalds } else 5871da177e4SLinus Torvalds *skip_bytes -= length; 5881da177e4SLinus Torvalds 5891da177e4SLinus Torvalds free_pages((unsigned long)pages_start, 1); 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds /* Now look at all of this device's children. */ 5921da177e4SLinus Torvalds for (chix = 0; chix < usbdev->maxchild; chix++) { 5931da177e4SLinus Torvalds struct usb_device *childdev = usbdev->children[chix]; 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds if (childdev) { 5969ad3d6ccSAlan Stern usb_lock_device(childdev); 597376c0d3fSGreg Kroah-Hartman ret = usb_device_dump(buffer, nbytes, skip_bytes, 598376c0d3fSGreg Kroah-Hartman file_offset, childdev, bus, 599376c0d3fSGreg Kroah-Hartman level + 1, chix, ++cnt); 6009ad3d6ccSAlan Stern usb_unlock_device(childdev); 6011da177e4SLinus Torvalds if (ret == -EFAULT) 6021da177e4SLinus Torvalds return total_written; 6031da177e4SLinus Torvalds total_written += ret; 6041da177e4SLinus Torvalds } 6051da177e4SLinus Torvalds } 6061da177e4SLinus Torvalds return total_written; 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds 609376c0d3fSGreg Kroah-Hartman static ssize_t usb_device_read(struct file *file, char __user *buf, 610376c0d3fSGreg Kroah-Hartman size_t nbytes, loff_t *ppos) 6111da177e4SLinus Torvalds { 6121da177e4SLinus Torvalds struct usb_bus *bus; 6131da177e4SLinus Torvalds ssize_t ret, total_written = 0; 6141da177e4SLinus Torvalds loff_t skip_bytes = *ppos; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds if (*ppos < 0) 6171da177e4SLinus Torvalds return -EINVAL; 6181da177e4SLinus Torvalds if (nbytes <= 0) 6191da177e4SLinus Torvalds return 0; 6201da177e4SLinus Torvalds if (!access_ok(VERIFY_WRITE, buf, nbytes)) 6211da177e4SLinus Torvalds return -EFAULT; 6221da177e4SLinus Torvalds 6234186ecf8SArjan van de Ven mutex_lock(&usb_bus_list_lock); 6241da177e4SLinus Torvalds /* print devices for all busses */ 6251da177e4SLinus Torvalds list_for_each_entry(bus, &usb_bus_list, bus_list) { 6261da177e4SLinus Torvalds /* recurse through all children of the root hub */ 6271da177e4SLinus Torvalds if (!bus->root_hub) 6281da177e4SLinus Torvalds continue; 6291da177e4SLinus Torvalds usb_lock_device(bus->root_hub); 630376c0d3fSGreg Kroah-Hartman ret = usb_device_dump(&buf, &nbytes, &skip_bytes, ppos, 631376c0d3fSGreg Kroah-Hartman bus->root_hub, bus, 0, 0, 0); 6321da177e4SLinus Torvalds usb_unlock_device(bus->root_hub); 6331da177e4SLinus Torvalds if (ret < 0) { 6344186ecf8SArjan van de Ven mutex_unlock(&usb_bus_list_lock); 6351da177e4SLinus Torvalds return ret; 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds total_written += ret; 6381da177e4SLinus Torvalds } 6394186ecf8SArjan van de Ven mutex_unlock(&usb_bus_list_lock); 6401da177e4SLinus Torvalds return total_written; 6411da177e4SLinus Torvalds } 6421da177e4SLinus Torvalds 6431da177e4SLinus Torvalds /* Kernel lock for "lastev" protection */ 644376c0d3fSGreg Kroah-Hartman static unsigned int usb_device_poll(struct file *file, 645376c0d3fSGreg Kroah-Hartman struct poll_table_struct *wait) 6461da177e4SLinus Torvalds { 6477bc80cd9SLinus Torvalds unsigned int event_count; 6481da177e4SLinus Torvalds 6497bc80cd9SLinus Torvalds poll_wait(file, &device_event.wait, wait); 6507bc80cd9SLinus Torvalds 6517bc80cd9SLinus Torvalds event_count = atomic_read(&device_event.count); 6527bc80cd9SLinus Torvalds if (file->f_version != event_count) { 6537bc80cd9SLinus Torvalds file->f_version = event_count; 6547bc80cd9SLinus Torvalds return POLLIN | POLLRDNORM; 6556957e1acSOliver Neukum } 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds return 0; 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds static loff_t usb_device_lseek(struct file *file, loff_t offset, int orig) 6611da177e4SLinus Torvalds { 6621da177e4SLinus Torvalds loff_t ret; 6631da177e4SLinus Torvalds 664f9de332eSOliver Neukum mutex_lock(&file->f_dentry->d_inode->i_mutex); 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds switch (orig) { 6671da177e4SLinus Torvalds case 0: 6681da177e4SLinus Torvalds file->f_pos = offset; 6691da177e4SLinus Torvalds ret = file->f_pos; 6701da177e4SLinus Torvalds break; 6711da177e4SLinus Torvalds case 1: 6721da177e4SLinus Torvalds file->f_pos += offset; 6731da177e4SLinus Torvalds ret = file->f_pos; 6741da177e4SLinus Torvalds break; 6751da177e4SLinus Torvalds case 2: 6761da177e4SLinus Torvalds default: 6771da177e4SLinus Torvalds ret = -EINVAL; 6781da177e4SLinus Torvalds } 6791da177e4SLinus Torvalds 680f9de332eSOliver Neukum mutex_unlock(&file->f_dentry->d_inode->i_mutex); 6811da177e4SLinus Torvalds return ret; 6821da177e4SLinus Torvalds } 6831da177e4SLinus Torvalds 684066202ddSLuiz Fernando N. Capitulino const struct file_operations usbfs_devices_fops = { 6851da177e4SLinus Torvalds .llseek = usb_device_lseek, 6861da177e4SLinus Torvalds .read = usb_device_read, 6871da177e4SLinus Torvalds .poll = usb_device_poll, 6881da177e4SLinus Torvalds }; 689