11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * devices.c 31da177e4SLinus Torvalds * (C) Copyright 1999 Randy Dunlap. 41da177e4SLinus Torvalds * (C) Copyright 1999,2000 Thomas Sailer <sailer@ife.ee.ethz.ch>. (proc file per device) 51da177e4SLinus Torvalds * (C) Copyright 1999 Deti Fliegl (new USB architecture) 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 81da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 91da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 101da177e4SLinus Torvalds * (at your option) any later version. 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 131da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 141da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 151da177e4SLinus Torvalds * GNU General Public License for more details. 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 181da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 191da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds ************************************************************* 221da177e4SLinus Torvalds * 231da177e4SLinus Torvalds * <mountpoint>/devices contains USB topology, device, config, class, 241da177e4SLinus Torvalds * interface, & endpoint data. 251da177e4SLinus Torvalds * 261da177e4SLinus Torvalds * I considered using /proc/bus/usb/devices/device# for each device 271da177e4SLinus Torvalds * as it is attached or detached, but I didn't like this for some 281da177e4SLinus Torvalds * reason -- maybe it's just too deep of a directory structure. 291da177e4SLinus Torvalds * I also don't like looking in multiple places to gather and view 301da177e4SLinus Torvalds * the data. Having only one file for ./devices also prevents race 311da177e4SLinus Torvalds * conditions that could arise if a program was reading device info 321da177e4SLinus Torvalds * for devices that are being removed (unplugged). (That is, the 331da177e4SLinus Torvalds * program may find a directory for devnum_12 then try to open it, 341da177e4SLinus Torvalds * but it was just unplugged, so the directory is now deleted. 351da177e4SLinus Torvalds * But programs would just have to be prepared for situations like 361da177e4SLinus Torvalds * this in any plug-and-play environment.) 371da177e4SLinus Torvalds * 381da177e4SLinus Torvalds * 1999-12-16: Thomas Sailer <sailer@ife.ee.ethz.ch> 391da177e4SLinus Torvalds * Converted the whole proc stuff to real 401da177e4SLinus Torvalds * read methods. Now not the whole device list needs to fit 411da177e4SLinus Torvalds * into one page, only the device list for one bus. 421da177e4SLinus Torvalds * Added a poll method to /proc/bus/usb/devices, to wake 431da177e4SLinus Torvalds * up an eventual usbd 441da177e4SLinus Torvalds * 2000-01-04: Thomas Sailer <sailer@ife.ee.ethz.ch> 451da177e4SLinus Torvalds * Turned into its own filesystem 461da177e4SLinus Torvalds * 2000-07-05: Ashley Montanaro <ashley@compsoc.man.ac.uk> 471da177e4SLinus Torvalds * Converted file reading routine to dump to buffer once 481da177e4SLinus Torvalds * per device, not per bus 491da177e4SLinus Torvalds */ 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds #include <linux/fs.h> 521da177e4SLinus Torvalds #include <linux/mm.h> 531da177e4SLinus Torvalds #include <linux/slab.h> 541da177e4SLinus Torvalds #include <linux/poll.h> 551da177e4SLinus Torvalds #include <linux/usb.h> 561da177e4SLinus Torvalds #include <linux/smp_lock.h> 571da177e4SLinus Torvalds #include <linux/usbdevice_fs.h> 584186ecf8SArjan van de Ven #include <linux/mutex.h> 591da177e4SLinus Torvalds #include <asm/uaccess.h> 601da177e4SLinus Torvalds 616d5e8254SGreg KH #include "usb.h" 621da177e4SLinus Torvalds #include "hcd.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 674c4c9432SArjan van de Ven static const char *format_topo = 681da177e4SLinus Torvalds /* T: Bus=dd Lev=dd Prnt=dd Port=dd Cnt=dd Dev#=ddd Spd=ddd MxCh=dd */ 691da177e4SLinus Torvalds "\nT: Bus=%2.2d Lev=%2.2d Prnt=%2.2d Port=%2.2d Cnt=%2.2d Dev#=%3d Spd=%3s MxCh=%2d\n"; 701da177e4SLinus Torvalds 714c4c9432SArjan van de Ven static const char *format_string_manufacturer = 721da177e4SLinus Torvalds /* S: Manufacturer=xxxx */ 731da177e4SLinus Torvalds "S: Manufacturer=%.100s\n"; 741da177e4SLinus Torvalds 754c4c9432SArjan van de Ven 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 804c4c9432SArjan van de Ven static const char *format_string_serialnumber = 811da177e4SLinus Torvalds /* S: SerialNumber=xxxx */ 821da177e4SLinus Torvalds "S: SerialNumber=%.100s\n"; 831da177e4SLinus Torvalds #endif 841da177e4SLinus Torvalds 854c4c9432SArjan van de Ven 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 894c4c9432SArjan van de Ven 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 934c4c9432SArjan van de Ven 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 974c4c9432SArjan van de Ven 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 101165fe97eSCraig W. Nadler 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 1054c4c9432SArjan van de Ven 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 1094c4c9432SArjan van de Ven 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 1201da177e4SLinus Torvalds static DECLARE_WAIT_QUEUE_HEAD(deviceconndiscwq); 121376c0d3fSGreg Kroah-Hartman static unsigned int conndiscevcnt; 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds /* this struct stores the poll state for <mountpoint>/devices pollers */ 1241da177e4SLinus Torvalds struct usb_device_status { 1251da177e4SLinus Torvalds unsigned int lastev; 1261da177e4SLinus Torvalds }; 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds struct class_info { 1291da177e4SLinus Torvalds int class; 1301da177e4SLinus Torvalds char *class_name; 1311da177e4SLinus Torvalds }; 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds static const struct class_info clas_info[] = 1341da177e4SLinus Torvalds { /* max. 5 chars. per name string */ 1351da177e4SLinus Torvalds {USB_CLASS_PER_INTERFACE, ">ifc"}, 1361da177e4SLinus Torvalds {USB_CLASS_AUDIO, "audio"}, 1371da177e4SLinus Torvalds {USB_CLASS_COMM, "comm."}, 1381da177e4SLinus Torvalds {USB_CLASS_HID, "HID"}, 1391da177e4SLinus Torvalds {USB_CLASS_PHYSICAL, "PID"}, 140bf7fbb02SFrans Pop {USB_CLASS_STILL_IMAGE, "still"}, 1411da177e4SLinus Torvalds {USB_CLASS_PRINTER, "print"}, 1421da177e4SLinus Torvalds {USB_CLASS_MASS_STORAGE, "stor."}, 143bf7fbb02SFrans Pop {USB_CLASS_HUB, "hub"}, 1441da177e4SLinus Torvalds {USB_CLASS_CDC_DATA, "data"}, 1451da177e4SLinus Torvalds {USB_CLASS_CSCID, "scard"}, 1461da177e4SLinus Torvalds {USB_CLASS_CONTENT_SEC, "c-sec"}, 147165fe97eSCraig W. Nadler {USB_CLASS_VIDEO, "video"}, 148bf7fbb02SFrans Pop {USB_CLASS_WIRELESS_CONTROLLER, "wlcon"}, 149bf7fbb02SFrans Pop {USB_CLASS_MISC, "misc"}, 150bf7fbb02SFrans Pop {USB_CLASS_APP_SPEC, "app."}, 151bf7fbb02SFrans Pop {USB_CLASS_VENDOR_SPEC, "vend."}, 1521da177e4SLinus Torvalds {-1, "unk."} /* leave as last */ 1531da177e4SLinus Torvalds }; 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds /*****************************************************************/ 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds void usbfs_conn_disc_event(void) 1581da177e4SLinus Torvalds { 1591da177e4SLinus Torvalds conndiscevcnt++; 1601da177e4SLinus Torvalds wake_up(&deviceconndiscwq); 1611da177e4SLinus Torvalds } 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds static const char *class_decode(const int class) 1641da177e4SLinus Torvalds { 1651da177e4SLinus Torvalds int ix; 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds for (ix = 0; clas_info[ix].class != -1; ix++) 1681da177e4SLinus Torvalds if (clas_info[ix].class == class) 1691da177e4SLinus Torvalds break; 1701a68f71dSOliver Neukum return clas_info[ix].class_name; 1711da177e4SLinus Torvalds } 1721da177e4SLinus Torvalds 173376c0d3fSGreg Kroah-Hartman static char *usb_dump_endpoint_descriptor(int speed, char *start, char *end, 174376c0d3fSGreg Kroah-Hartman const struct usb_endpoint_descriptor *desc) 1751da177e4SLinus Torvalds { 1761da177e4SLinus Torvalds char dir, unit, *type; 17787ad46c9SLuiz Fernando N. Capitulino unsigned interval, bandwidth = 1; 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds if (start > end) 1801da177e4SLinus Torvalds return start; 18187ad46c9SLuiz Fernando N. Capitulino 18287ad46c9SLuiz Fernando N. Capitulino dir = usb_endpoint_dir_in(desc) ? 'I' : 'O'; 18387ad46c9SLuiz Fernando N. Capitulino 1841da177e4SLinus Torvalds if (speed == USB_SPEED_HIGH) { 1851da177e4SLinus Torvalds switch (le16_to_cpu(desc->wMaxPacketSize) & (0x03 << 11)) { 1861da177e4SLinus Torvalds case 1 << 11: bandwidth = 2; break; 1871da177e4SLinus Torvalds case 2 << 11: bandwidth = 3; break; 1881da177e4SLinus Torvalds } 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds /* this isn't checking for illegal values */ 1922e0fe709SJulia Lawall switch (usb_endpoint_type(desc)) { 1931da177e4SLinus Torvalds case USB_ENDPOINT_XFER_CONTROL: 1941da177e4SLinus Torvalds type = "Ctrl"; 1951da177e4SLinus Torvalds if (speed == USB_SPEED_HIGH) /* uframes per NAK */ 1961da177e4SLinus Torvalds interval = desc->bInterval; 1971da177e4SLinus Torvalds else 1981da177e4SLinus Torvalds interval = 0; 1991da177e4SLinus Torvalds dir = 'B'; /* ctrl is bidirectional */ 2001da177e4SLinus Torvalds break; 2011da177e4SLinus Torvalds case USB_ENDPOINT_XFER_ISOC: 2021da177e4SLinus Torvalds type = "Isoc"; 2031da177e4SLinus Torvalds interval = 1 << (desc->bInterval - 1); 2041da177e4SLinus Torvalds break; 2051da177e4SLinus Torvalds case USB_ENDPOINT_XFER_BULK: 2061da177e4SLinus Torvalds type = "Bulk"; 20787ad46c9SLuiz Fernando N. Capitulino if (speed == USB_SPEED_HIGH && dir == 'O') /* uframes per NAK */ 2081da177e4SLinus Torvalds interval = desc->bInterval; 2091da177e4SLinus Torvalds else 2101da177e4SLinus Torvalds interval = 0; 2111da177e4SLinus Torvalds break; 2121da177e4SLinus Torvalds case USB_ENDPOINT_XFER_INT: 2131da177e4SLinus Torvalds type = "Int."; 2141a68f71dSOliver Neukum if (speed == USB_SPEED_HIGH) 2151da177e4SLinus Torvalds interval = 1 << (desc->bInterval - 1); 2161a68f71dSOliver Neukum else 2171da177e4SLinus Torvalds interval = desc->bInterval; 2181da177e4SLinus Torvalds break; 2191da177e4SLinus Torvalds default: /* "can't happen" */ 2201da177e4SLinus Torvalds return start; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds interval *= (speed == USB_SPEED_HIGH) ? 125 : 1000; 2231da177e4SLinus Torvalds if (interval % 1000) 2241da177e4SLinus Torvalds unit = 'u'; 2251da177e4SLinus Torvalds else { 2261da177e4SLinus Torvalds unit = 'm'; 2271da177e4SLinus Torvalds interval /= 1000; 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds start += sprintf(start, format_endpt, desc->bEndpointAddress, dir, 2311da177e4SLinus Torvalds desc->bmAttributes, type, 232376c0d3fSGreg Kroah-Hartman (le16_to_cpu(desc->wMaxPacketSize) & 0x07ff) * 233376c0d3fSGreg Kroah-Hartman bandwidth, 2341da177e4SLinus Torvalds interval, unit); 2351da177e4SLinus Torvalds return start; 2361da177e4SLinus Torvalds } 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds static char *usb_dump_interface_descriptor(char *start, char *end, 2391da177e4SLinus Torvalds const struct usb_interface_cache *intfc, 2401da177e4SLinus Torvalds const struct usb_interface *iface, 2411da177e4SLinus Torvalds int setno) 2421da177e4SLinus Torvalds { 243376c0d3fSGreg Kroah-Hartman const struct usb_interface_descriptor *desc; 2448d790d74SDmitry Torokhov const char *driver_name = ""; 2452360e4aaSDavid Brownell int active = 0; 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds if (start > end) 2481da177e4SLinus Torvalds return start; 249376c0d3fSGreg Kroah-Hartman desc = &intfc->altsetting[setno].desc; 2502360e4aaSDavid Brownell if (iface) { 2511da177e4SLinus Torvalds driver_name = (iface->dev.driver 2521da177e4SLinus Torvalds ? iface->dev.driver->name 2531da177e4SLinus Torvalds : "(none)"); 2542360e4aaSDavid Brownell active = (desc == &iface->cur_altsetting->desc); 2552360e4aaSDavid Brownell } 2561da177e4SLinus Torvalds start += sprintf(start, format_iface, 2572360e4aaSDavid Brownell active ? '*' : ' ', /* mark active altsetting */ 2581da177e4SLinus Torvalds desc->bInterfaceNumber, 2591da177e4SLinus Torvalds desc->bAlternateSetting, 2601da177e4SLinus Torvalds desc->bNumEndpoints, 2611da177e4SLinus Torvalds desc->bInterfaceClass, 2621da177e4SLinus Torvalds class_decode(desc->bInterfaceClass), 2631da177e4SLinus Torvalds desc->bInterfaceSubClass, 2641da177e4SLinus Torvalds desc->bInterfaceProtocol, 2651da177e4SLinus Torvalds driver_name); 2661da177e4SLinus Torvalds return start; 2671da177e4SLinus Torvalds } 2681da177e4SLinus Torvalds 269376c0d3fSGreg Kroah-Hartman static char *usb_dump_interface(int speed, char *start, char *end, 2701da177e4SLinus Torvalds const struct usb_interface_cache *intfc, 271376c0d3fSGreg Kroah-Hartman const struct usb_interface *iface, int setno) 272376c0d3fSGreg Kroah-Hartman { 2731da177e4SLinus Torvalds const struct usb_host_interface *desc = &intfc->altsetting[setno]; 2741da177e4SLinus Torvalds int i; 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds start = usb_dump_interface_descriptor(start, end, intfc, iface, setno); 2771da177e4SLinus Torvalds for (i = 0; i < desc->desc.bNumEndpoints; i++) { 2781da177e4SLinus Torvalds if (start > end) 2791da177e4SLinus Torvalds return start; 2801da177e4SLinus Torvalds start = usb_dump_endpoint_descriptor(speed, 2811da177e4SLinus Torvalds start, end, &desc->endpoint[i].desc); 2821da177e4SLinus Torvalds } 2831da177e4SLinus Torvalds return start; 2841da177e4SLinus Torvalds } 2851da177e4SLinus Torvalds 286165fe97eSCraig W. Nadler static char *usb_dump_iad_descriptor(char *start, char *end, 287165fe97eSCraig W. Nadler const struct usb_interface_assoc_descriptor *iad) 288165fe97eSCraig W. Nadler { 289165fe97eSCraig W. Nadler if (start > end) 290165fe97eSCraig W. Nadler return start; 291165fe97eSCraig W. Nadler start += sprintf(start, format_iad, 292165fe97eSCraig W. Nadler iad->bFirstInterface, 293165fe97eSCraig W. Nadler iad->bInterfaceCount, 294165fe97eSCraig W. Nadler iad->bFunctionClass, 295165fe97eSCraig W. Nadler class_decode(iad->bFunctionClass), 296165fe97eSCraig W. Nadler iad->bFunctionSubClass, 297165fe97eSCraig W. Nadler iad->bFunctionProtocol); 298165fe97eSCraig W. Nadler return start; 299165fe97eSCraig W. Nadler } 300165fe97eSCraig W. Nadler 3011da177e4SLinus Torvalds /* TBD: 3021da177e4SLinus Torvalds * 0. TBDs 3031da177e4SLinus Torvalds * 1. marking active interface altsettings (code lists all, but should mark 3041da177e4SLinus Torvalds * which ones are active, if any) 3051da177e4SLinus Torvalds */ 306376c0d3fSGreg Kroah-Hartman static char *usb_dump_config_descriptor(char *start, char *end, 307376c0d3fSGreg Kroah-Hartman const struct usb_config_descriptor *desc, 308376c0d3fSGreg Kroah-Hartman int active) 3091da177e4SLinus Torvalds { 3101da177e4SLinus Torvalds if (start > end) 3111da177e4SLinus Torvalds return start; 3121da177e4SLinus Torvalds start += sprintf(start, format_config, 313376c0d3fSGreg Kroah-Hartman /* mark active/actual/current cfg. */ 314376c0d3fSGreg Kroah-Hartman active ? '*' : ' ', 3151da177e4SLinus Torvalds desc->bNumInterfaces, 3161da177e4SLinus Torvalds desc->bConfigurationValue, 3171da177e4SLinus Torvalds desc->bmAttributes, 3181da177e4SLinus Torvalds desc->bMaxPower * 2); 3191da177e4SLinus Torvalds return start; 3201da177e4SLinus Torvalds } 3211da177e4SLinus Torvalds 322376c0d3fSGreg Kroah-Hartman static char *usb_dump_config(int speed, char *start, char *end, 323376c0d3fSGreg Kroah-Hartman const struct usb_host_config *config, int active) 3241da177e4SLinus Torvalds { 3251da177e4SLinus Torvalds int i, j; 3261da177e4SLinus Torvalds struct usb_interface_cache *intfc; 3271da177e4SLinus Torvalds struct usb_interface *interface; 3281da177e4SLinus Torvalds 3291da177e4SLinus Torvalds if (start > end) 3301da177e4SLinus Torvalds return start; 331376c0d3fSGreg Kroah-Hartman if (!config) 332376c0d3fSGreg Kroah-Hartman /* getting these some in 2.3.7; none in 2.3.6 */ 3331da177e4SLinus Torvalds return start + sprintf(start, "(null Cfg. desc.)\n"); 3341da177e4SLinus Torvalds start = usb_dump_config_descriptor(start, end, &config->desc, active); 335165fe97eSCraig W. Nadler for (i = 0; i < USB_MAXIADS; i++) { 336165fe97eSCraig W. Nadler if (config->intf_assoc[i] == NULL) 337165fe97eSCraig W. Nadler break; 338165fe97eSCraig W. Nadler start = usb_dump_iad_descriptor(start, end, 339165fe97eSCraig W. Nadler config->intf_assoc[i]); 340165fe97eSCraig W. Nadler } 3411da177e4SLinus Torvalds for (i = 0; i < config->desc.bNumInterfaces; i++) { 3421da177e4SLinus Torvalds intfc = config->intf_cache[i]; 3431da177e4SLinus Torvalds interface = config->interface[i]; 3441da177e4SLinus Torvalds for (j = 0; j < intfc->num_altsetting; j++) { 3451da177e4SLinus Torvalds if (start > end) 3461da177e4SLinus Torvalds return start; 3471da177e4SLinus Torvalds start = usb_dump_interface(speed, 3481da177e4SLinus Torvalds start, end, intfc, interface, j); 3491da177e4SLinus Torvalds } 3501da177e4SLinus Torvalds } 3511da177e4SLinus Torvalds return start; 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds /* 3551da177e4SLinus Torvalds * Dump the different USB descriptors. 3561da177e4SLinus Torvalds */ 357376c0d3fSGreg Kroah-Hartman static char *usb_dump_device_descriptor(char *start, char *end, 358376c0d3fSGreg Kroah-Hartman const struct usb_device_descriptor *desc) 3591da177e4SLinus Torvalds { 3601da177e4SLinus Torvalds u16 bcdUSB = le16_to_cpu(desc->bcdUSB); 3611da177e4SLinus Torvalds u16 bcdDevice = le16_to_cpu(desc->bcdDevice); 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds if (start > end) 3641da177e4SLinus Torvalds return start; 3651da177e4SLinus Torvalds start += sprintf(start, format_device1, 3661da177e4SLinus Torvalds bcdUSB >> 8, bcdUSB & 0xff, 3671da177e4SLinus Torvalds desc->bDeviceClass, 3681da177e4SLinus Torvalds class_decode(desc->bDeviceClass), 3691da177e4SLinus Torvalds desc->bDeviceSubClass, 3701da177e4SLinus Torvalds desc->bDeviceProtocol, 3711da177e4SLinus Torvalds desc->bMaxPacketSize0, 3721da177e4SLinus Torvalds desc->bNumConfigurations); 3731da177e4SLinus Torvalds if (start > end) 3741da177e4SLinus Torvalds return start; 3751da177e4SLinus Torvalds start += sprintf(start, format_device2, 3761da177e4SLinus Torvalds le16_to_cpu(desc->idVendor), 3771da177e4SLinus Torvalds le16_to_cpu(desc->idProduct), 3781da177e4SLinus Torvalds bcdDevice >> 8, bcdDevice & 0xff); 3791da177e4SLinus Torvalds return start; 3801da177e4SLinus Torvalds } 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds /* 3831da177e4SLinus Torvalds * Dump the different strings that this device holds. 3841da177e4SLinus Torvalds */ 385376c0d3fSGreg Kroah-Hartman static char *usb_dump_device_strings(char *start, char *end, 386376c0d3fSGreg Kroah-Hartman struct usb_device *dev) 3871da177e4SLinus Torvalds { 3881da177e4SLinus Torvalds if (start > end) 3891da177e4SLinus Torvalds return start; 3901da177e4SLinus Torvalds if (dev->manufacturer) 391376c0d3fSGreg Kroah-Hartman start += sprintf(start, format_string_manufacturer, 392376c0d3fSGreg Kroah-Hartman dev->manufacturer); 3931da177e4SLinus Torvalds if (start > end) 3941da177e4SLinus Torvalds goto out; 3951da177e4SLinus Torvalds if (dev->product) 3961da177e4SLinus Torvalds start += sprintf(start, format_string_product, dev->product); 3971da177e4SLinus Torvalds if (start > end) 3981da177e4SLinus Torvalds goto out; 3991da177e4SLinus Torvalds #ifdef ALLOW_SERIAL_NUMBER 4001da177e4SLinus Torvalds if (dev->serial) 401376c0d3fSGreg Kroah-Hartman start += sprintf(start, format_string_serialnumber, 402376c0d3fSGreg Kroah-Hartman dev->serial); 4031da177e4SLinus Torvalds #endif 4041da177e4SLinus Torvalds out: 4051da177e4SLinus Torvalds return start; 4061da177e4SLinus Torvalds } 4071da177e4SLinus Torvalds 4081da177e4SLinus Torvalds static char *usb_dump_desc(char *start, char *end, struct usb_device *dev) 4091da177e4SLinus Torvalds { 4101da177e4SLinus Torvalds int i; 4111da177e4SLinus Torvalds 4121da177e4SLinus Torvalds if (start > end) 4131da177e4SLinus Torvalds return start; 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds start = usb_dump_device_descriptor(start, end, &dev->descriptor); 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds if (start > end) 4181da177e4SLinus Torvalds return start; 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds start = usb_dump_device_strings(start, end, dev); 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds for (i = 0; i < dev->descriptor.bNumConfigurations; i++) { 4231da177e4SLinus Torvalds if (start > end) 4241da177e4SLinus Torvalds return start; 4251da177e4SLinus Torvalds start = usb_dump_config(dev->speed, 4261da177e4SLinus Torvalds start, end, dev->config + i, 4271da177e4SLinus Torvalds /* active ? */ 4281da177e4SLinus Torvalds (dev->config + i) == dev->actconfig); 4291da177e4SLinus Torvalds } 4301da177e4SLinus Torvalds return start; 4311da177e4SLinus Torvalds } 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds 4341da177e4SLinus Torvalds #ifdef PROC_EXTRA /* TBD: may want to add this code later */ 4351da177e4SLinus Torvalds 436376c0d3fSGreg Kroah-Hartman static char *usb_dump_hub_descriptor(char *start, char *end, 437376c0d3fSGreg Kroah-Hartman const struct usb_hub_descriptor *desc) 4381da177e4SLinus Torvalds { 4391da177e4SLinus Torvalds int leng = USB_DT_HUB_NONVAR_SIZE; 4401da177e4SLinus Torvalds unsigned char *ptr = (unsigned char *)desc; 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds if (start > end) 4431da177e4SLinus Torvalds return start; 4441da177e4SLinus Torvalds start += sprintf(start, "Interface:"); 4451da177e4SLinus Torvalds while (leng && start <= end) { 4461da177e4SLinus Torvalds start += sprintf(start, " %02x", *ptr); 4471da177e4SLinus Torvalds ptr++; leng--; 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds *start++ = '\n'; 4501da177e4SLinus Torvalds return start; 4511da177e4SLinus Torvalds } 4521da177e4SLinus Torvalds 453376c0d3fSGreg Kroah-Hartman static char *usb_dump_string(char *start, char *end, 454376c0d3fSGreg Kroah-Hartman const struct usb_device *dev, char *id, int index) 4551da177e4SLinus Torvalds { 4561da177e4SLinus Torvalds if (start > end) 4571da177e4SLinus Torvalds return start; 4581da177e4SLinus Torvalds start += sprintf(start, "Interface:"); 459376c0d3fSGreg Kroah-Hartman if (index <= dev->maxstring && dev->stringindex && 460376c0d3fSGreg Kroah-Hartman dev->stringindex[index]) 461376c0d3fSGreg Kroah-Hartman start += sprintf(start, "%s: %.100s ", id, 462376c0d3fSGreg Kroah-Hartman dev->stringindex[index]); 4631da177e4SLinus Torvalds return start; 4641da177e4SLinus Torvalds } 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds #endif /* PROC_EXTRA */ 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds /*****************************************************************/ 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds /* This is a recursive function. Parameters: 4711da177e4SLinus Torvalds * buffer - the user-space buffer to write data into 4721da177e4SLinus Torvalds * nbytes - the maximum number of bytes to write 4731da177e4SLinus Torvalds * skip_bytes - the number of bytes to skip before writing anything 4741da177e4SLinus Torvalds * file_offset - the offset into the devices file on completion 4751da177e4SLinus Torvalds * The caller must own the device lock. 4761da177e4SLinus Torvalds */ 477376c0d3fSGreg Kroah-Hartman static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes, 478376c0d3fSGreg Kroah-Hartman loff_t *skip_bytes, loff_t *file_offset, 479376c0d3fSGreg Kroah-Hartman struct usb_device *usbdev, struct usb_bus *bus, 480376c0d3fSGreg Kroah-Hartman int level, int index, int count) 4811da177e4SLinus Torvalds { 4821da177e4SLinus Torvalds int chix; 4831da177e4SLinus Torvalds int ret, cnt = 0; 4841da177e4SLinus Torvalds int parent_devnum = 0; 4851da177e4SLinus Torvalds char *pages_start, *data_end, *speed; 4861da177e4SLinus Torvalds unsigned int length; 4871da177e4SLinus Torvalds ssize_t total_written = 0; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds /* don't bother with anything else if we're not writing any data */ 4901da177e4SLinus Torvalds if (*nbytes <= 0) 4911da177e4SLinus Torvalds return 0; 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds if (level > MAX_TOPO_LEVEL) 4941da177e4SLinus Torvalds return 0; 495376c0d3fSGreg Kroah-Hartman /* allocate 2^1 pages = 8K (on i386); 496376c0d3fSGreg Kroah-Hartman * should be more than enough for one device */ 497376c0d3fSGreg Kroah-Hartman pages_start = (char *)__get_free_pages(GFP_KERNEL, 1); 498376c0d3fSGreg Kroah-Hartman if (!pages_start) 4991da177e4SLinus Torvalds return -ENOMEM; 5001da177e4SLinus Torvalds 5011da177e4SLinus Torvalds if (usbdev->parent && usbdev->parent->devnum != -1) 5021da177e4SLinus Torvalds parent_devnum = usbdev->parent->devnum; 5031da177e4SLinus Torvalds /* 5041da177e4SLinus Torvalds * So the root hub's parent is 0 and any device that is 5051da177e4SLinus Torvalds * plugged into the root hub has a parent of 0. 5061da177e4SLinus Torvalds */ 5071da177e4SLinus Torvalds switch (usbdev->speed) { 5081da177e4SLinus Torvalds case USB_SPEED_LOW: 5091da177e4SLinus Torvalds speed = "1.5"; break; 5101da177e4SLinus Torvalds case USB_SPEED_UNKNOWN: /* usb 1.1 root hub code */ 5111da177e4SLinus Torvalds case USB_SPEED_FULL: 5121da177e4SLinus Torvalds speed = "12 "; break; 5131da177e4SLinus Torvalds case USB_SPEED_HIGH: 5141da177e4SLinus Torvalds speed = "480"; break; 5151da177e4SLinus Torvalds default: 5161da177e4SLinus Torvalds speed = "?? "; 5171da177e4SLinus Torvalds } 5181da177e4SLinus Torvalds data_end = pages_start + sprintf(pages_start, format_topo, 5191da177e4SLinus Torvalds bus->busnum, level, parent_devnum, 5201da177e4SLinus Torvalds index, count, usbdev->devnum, 5211da177e4SLinus Torvalds speed, usbdev->maxchild); 5221da177e4SLinus Torvalds /* 5231da177e4SLinus Torvalds * level = topology-tier level; 5241da177e4SLinus Torvalds * parent_devnum = parent device number; 5251da177e4SLinus Torvalds * index = parent's connector number; 5261da177e4SLinus Torvalds * count = device count at this level 5271da177e4SLinus Torvalds */ 5281da177e4SLinus Torvalds /* If this is the root hub, display the bandwidth information */ 5291da177e4SLinus Torvalds if (level == 0) { 5301da177e4SLinus Torvalds int max; 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds /* high speed reserves 80%, full/low reserves 90% */ 5331da177e4SLinus Torvalds if (usbdev->speed == USB_SPEED_HIGH) 5341da177e4SLinus Torvalds max = 800; 5351da177e4SLinus Torvalds else 5361da177e4SLinus Torvalds max = FRAME_TIME_MAX_USECS_ALLOC; 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds /* report "average" periodic allocation over a microsecond. 5391da177e4SLinus Torvalds * the schedules are actually bursty, HCDs need to deal with 5401da177e4SLinus Torvalds * that and just compute/report this average. 5411da177e4SLinus Torvalds */ 5421da177e4SLinus Torvalds data_end += sprintf(data_end, format_bandwidth, 5431da177e4SLinus Torvalds bus->bandwidth_allocated, max, 5441da177e4SLinus Torvalds (100 * bus->bandwidth_allocated + max / 2) 5451da177e4SLinus Torvalds / max, 5461da177e4SLinus Torvalds bus->bandwidth_int_reqs, 5471da177e4SLinus Torvalds bus->bandwidth_isoc_reqs); 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds } 550376c0d3fSGreg Kroah-Hartman data_end = usb_dump_desc(data_end, pages_start + (2 * PAGE_SIZE) - 256, 551376c0d3fSGreg Kroah-Hartman usbdev); 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds if (data_end > (pages_start + (2 * PAGE_SIZE) - 256)) 5541da177e4SLinus Torvalds data_end += sprintf(data_end, "(truncated)\n"); 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds length = data_end - pages_start; 5571da177e4SLinus Torvalds /* if we can start copying some data to the user */ 5581da177e4SLinus Torvalds if (length > *skip_bytes) { 5591da177e4SLinus Torvalds length -= *skip_bytes; 5601da177e4SLinus Torvalds if (length > *nbytes) 5611da177e4SLinus Torvalds length = *nbytes; 5621da177e4SLinus Torvalds if (copy_to_user(*buffer, pages_start + *skip_bytes, length)) { 5631da177e4SLinus Torvalds free_pages((unsigned long)pages_start, 1); 5641da177e4SLinus Torvalds return -EFAULT; 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds *nbytes -= length; 5671da177e4SLinus Torvalds *file_offset += length; 5681da177e4SLinus Torvalds total_written += length; 5691da177e4SLinus Torvalds *buffer += length; 5701da177e4SLinus Torvalds *skip_bytes = 0; 5711da177e4SLinus Torvalds } else 5721da177e4SLinus Torvalds *skip_bytes -= length; 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds free_pages((unsigned long)pages_start, 1); 5751da177e4SLinus Torvalds 5761da177e4SLinus Torvalds /* Now look at all of this device's children. */ 5771da177e4SLinus Torvalds for (chix = 0; chix < usbdev->maxchild; chix++) { 5781da177e4SLinus Torvalds struct usb_device *childdev = usbdev->children[chix]; 5791da177e4SLinus Torvalds 5801da177e4SLinus Torvalds if (childdev) { 5819ad3d6ccSAlan Stern usb_lock_device(childdev); 582376c0d3fSGreg Kroah-Hartman ret = usb_device_dump(buffer, nbytes, skip_bytes, 583376c0d3fSGreg Kroah-Hartman file_offset, childdev, bus, 584376c0d3fSGreg Kroah-Hartman level + 1, chix, ++cnt); 5859ad3d6ccSAlan Stern usb_unlock_device(childdev); 5861da177e4SLinus Torvalds if (ret == -EFAULT) 5871da177e4SLinus Torvalds return total_written; 5881da177e4SLinus Torvalds total_written += ret; 5891da177e4SLinus Torvalds } 5901da177e4SLinus Torvalds } 5911da177e4SLinus Torvalds return total_written; 5921da177e4SLinus Torvalds } 5931da177e4SLinus Torvalds 594376c0d3fSGreg Kroah-Hartman static ssize_t usb_device_read(struct file *file, char __user *buf, 595376c0d3fSGreg Kroah-Hartman size_t nbytes, loff_t *ppos) 5961da177e4SLinus Torvalds { 5971da177e4SLinus Torvalds struct usb_bus *bus; 5981da177e4SLinus Torvalds ssize_t ret, total_written = 0; 5991da177e4SLinus Torvalds loff_t skip_bytes = *ppos; 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds if (*ppos < 0) 6021da177e4SLinus Torvalds return -EINVAL; 6031da177e4SLinus Torvalds if (nbytes <= 0) 6041da177e4SLinus Torvalds return 0; 6051da177e4SLinus Torvalds if (!access_ok(VERIFY_WRITE, buf, nbytes)) 6061da177e4SLinus Torvalds return -EFAULT; 6071da177e4SLinus Torvalds 6084186ecf8SArjan van de Ven mutex_lock(&usb_bus_list_lock); 6091da177e4SLinus Torvalds /* print devices for all busses */ 6101da177e4SLinus Torvalds list_for_each_entry(bus, &usb_bus_list, bus_list) { 6111da177e4SLinus Torvalds /* recurse through all children of the root hub */ 6121da177e4SLinus Torvalds if (!bus->root_hub) 6131da177e4SLinus Torvalds continue; 6141da177e4SLinus Torvalds usb_lock_device(bus->root_hub); 615376c0d3fSGreg Kroah-Hartman ret = usb_device_dump(&buf, &nbytes, &skip_bytes, ppos, 616376c0d3fSGreg Kroah-Hartman bus->root_hub, bus, 0, 0, 0); 6171da177e4SLinus Torvalds usb_unlock_device(bus->root_hub); 6181da177e4SLinus Torvalds if (ret < 0) { 6194186ecf8SArjan van de Ven mutex_unlock(&usb_bus_list_lock); 6201da177e4SLinus Torvalds return ret; 6211da177e4SLinus Torvalds } 6221da177e4SLinus Torvalds total_written += ret; 6231da177e4SLinus Torvalds } 6244186ecf8SArjan van de Ven mutex_unlock(&usb_bus_list_lock); 6251da177e4SLinus Torvalds return total_written; 6261da177e4SLinus Torvalds } 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds /* Kernel lock for "lastev" protection */ 629376c0d3fSGreg Kroah-Hartman static unsigned int usb_device_poll(struct file *file, 630376c0d3fSGreg Kroah-Hartman struct poll_table_struct *wait) 6311da177e4SLinus Torvalds { 632ec17cf1cSTobias Klauser struct usb_device_status *st = file->private_data; 6331da177e4SLinus Torvalds unsigned int mask = 0; 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds lock_kernel(); 6361da177e4SLinus Torvalds if (!st) { 6371da177e4SLinus Torvalds st = kmalloc(sizeof(struct usb_device_status), GFP_KERNEL); 6381da177e4SLinus Torvalds 639376c0d3fSGreg Kroah-Hartman /* we may have dropped BKL - 640376c0d3fSGreg Kroah-Hartman * need to check for having lost the race */ 6411da177e4SLinus Torvalds if (file->private_data) { 6421da177e4SLinus Torvalds kfree(st); 6431da177e4SLinus Torvalds st = file->private_data; 6441da177e4SLinus Torvalds goto lost_race; 6451da177e4SLinus Torvalds } 6466957e1acSOliver Neukum /* we haven't lost - check for allocation failure now */ 6476957e1acSOliver Neukum if (!st) { 6486957e1acSOliver Neukum unlock_kernel(); 6496957e1acSOliver Neukum return POLLIN; 6506957e1acSOliver Neukum } 6511da177e4SLinus Torvalds 6521da177e4SLinus Torvalds /* 6531da177e4SLinus Torvalds * need to prevent the module from being unloaded, since 6541da177e4SLinus Torvalds * proc_unregister does not call the release method and 6551da177e4SLinus Torvalds * we would have a memory leak 6561da177e4SLinus Torvalds */ 6571da177e4SLinus Torvalds st->lastev = conndiscevcnt; 6581da177e4SLinus Torvalds file->private_data = st; 6591da177e4SLinus Torvalds mask = POLLIN; 6601da177e4SLinus Torvalds } 6611da177e4SLinus Torvalds lost_race: 6621da177e4SLinus Torvalds if (file->f_mode & FMODE_READ) 6631da177e4SLinus Torvalds poll_wait(file, &deviceconndiscwq, wait); 6641da177e4SLinus Torvalds if (st->lastev != conndiscevcnt) 6651da177e4SLinus Torvalds mask |= POLLIN; 6661da177e4SLinus Torvalds st->lastev = conndiscevcnt; 6671da177e4SLinus Torvalds unlock_kernel(); 6681da177e4SLinus Torvalds return mask; 6691da177e4SLinus Torvalds } 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds static int usb_device_open(struct inode *inode, struct file *file) 6721da177e4SLinus Torvalds { 6731da177e4SLinus Torvalds file->private_data = NULL; 6741da177e4SLinus Torvalds return 0; 6751da177e4SLinus Torvalds } 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds static int usb_device_release(struct inode *inode, struct file *file) 6781da177e4SLinus Torvalds { 6791da177e4SLinus Torvalds kfree(file->private_data); 6801da177e4SLinus Torvalds file->private_data = NULL; 6811da177e4SLinus Torvalds return 0; 6821da177e4SLinus Torvalds } 6831da177e4SLinus Torvalds 6841da177e4SLinus Torvalds static loff_t usb_device_lseek(struct file *file, loff_t offset, int orig) 6851da177e4SLinus Torvalds { 6861da177e4SLinus Torvalds loff_t ret; 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds lock_kernel(); 6891da177e4SLinus Torvalds 6901da177e4SLinus Torvalds switch (orig) { 6911da177e4SLinus Torvalds case 0: 6921da177e4SLinus Torvalds file->f_pos = offset; 6931da177e4SLinus Torvalds ret = file->f_pos; 6941da177e4SLinus Torvalds break; 6951da177e4SLinus Torvalds case 1: 6961da177e4SLinus Torvalds file->f_pos += offset; 6971da177e4SLinus Torvalds ret = file->f_pos; 6981da177e4SLinus Torvalds break; 6991da177e4SLinus Torvalds case 2: 7001da177e4SLinus Torvalds default: 7011da177e4SLinus Torvalds ret = -EINVAL; 7021da177e4SLinus Torvalds } 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds unlock_kernel(); 7051da177e4SLinus Torvalds return ret; 7061da177e4SLinus Torvalds } 7071da177e4SLinus Torvalds 708066202ddSLuiz Fernando N. Capitulino const struct file_operations usbfs_devices_fops = { 7091da177e4SLinus Torvalds .llseek = usb_device_lseek, 7101da177e4SLinus Torvalds .read = usb_device_read, 7111da177e4SLinus Torvalds .poll = usb_device_poll, 7121da177e4SLinus Torvalds .open = usb_device_open, 7131da177e4SLinus Torvalds .release = usb_device_release, 7141da177e4SLinus Torvalds }; 715