diff options
Diffstat (limited to 'drivers/usb/core/devices.c')
| -rw-r--r-- | drivers/usb/core/devices.c | 195 |
1 files changed, 24 insertions, 171 deletions
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c index 2a3bbdf7eb94..a247da73f34d 100644 --- a/drivers/usb/core/devices.c +++ b/drivers/usb/core/devices.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * devices.c * (C) Copyright 1999 Randy Dunlap. @@ -5,26 +6,12 @@ * (proc file per device) * (C) Copyright 1999 Deti Fliegl (new USB architecture) * - * 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 2 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, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * ************************************************************* * * <mountpoint>/devices contains USB topology, device, config, class, * interface, & endpoint data. * - * I considered using /proc/bus/usb/devices/device# for each device + * I considered using /dev/bus/usb/device# for each device * as it is attached or detached, but I didn't like this for some * reason -- maybe it's just too deep of a directory structure. * I also don't like looking in multiple places to gather and view @@ -40,7 +27,7 @@ * Converted the whole proc stuff to real * read methods. Now not the whole device list needs to fit * into one page, only the device list for one bus. - * Added a poll method to /proc/bus/usb/devices, to wake + * Added a poll method to /sys/kernel/debug/usb/devices, to wake * up an eventual usbd * 2000-01-04: Thomas Sailer <sailer@ife.ee.ethz.ch> * Turned into its own filesystem @@ -52,7 +39,6 @@ #include <linux/fs.h> #include <linux/mm.h> #include <linux/gfp.h> -#include <linux/poll.h> #include <linux/usb.h> #include <linux/usbdevice_fs.h> #include <linux/usb/hcd.h> @@ -110,29 +96,6 @@ static const char format_endpt[] = /* E: Ad=xx(s) Atr=xx(ssss) MxPS=dddd Ivl=D?s */ "E: Ad=%02x(%c) Atr=%02x(%-4s) MxPS=%4d Ivl=%d%cs\n"; - -/* - * Need access to the driver and USB bus lists. - * extern struct list_head usb_bus_list; - * However, these will come from functions that return ptrs to each of them. - */ - -/* - * Wait for an connect/disconnect event to happen. We initialize - * the event counter with an odd number, and each event will increment - * the event counter by two, so it will always _stay_ odd. That means - * that it will never be zero, so "event 0" will never match a current - * event, and thus 'poll' will always trigger as readable for the first - * time it gets called. - */ -static struct device_connect_event { - atomic_t count; - wait_queue_head_t wait; -} device_event = { - .count = ATOMIC_INIT(1), - .wait = __WAIT_QUEUE_HEAD_INITIALIZER(device_event.wait) -}; - struct class_info { int class; char *class_name; @@ -153,6 +116,10 @@ static const struct class_info clas_info[] = { {USB_CLASS_CSCID, "scard"}, {USB_CLASS_CONTENT_SEC, "c-sec"}, {USB_CLASS_VIDEO, "video"}, + {USB_CLASS_PERSONAL_HEALTHCARE, "perhc"}, + {USB_CLASS_AUDIO_VIDEO, "av"}, + {USB_CLASS_BILLBOARD, "blbrd"}, + {USB_CLASS_USB_TYPE_C_BRIDGE, "bridg"}, {USB_CLASS_WIRELESS_CONTROLLER, "wlcon"}, {USB_CLASS_MISC, "misc"}, {USB_CLASS_APP_SPEC, "app."}, @@ -162,12 +129,6 @@ static const struct class_info clas_info[] = { /*****************************************************************/ -void usbfs_conn_disc_event(void) -{ - atomic_add(2, &device_event.count); - wake_up(&device_event.wait); -} - static const char *class_decode(const int class) { int ix; @@ -189,58 +150,39 @@ static char *usb_dump_endpoint_descriptor(int speed, char *start, char *end, dir = usb_endpoint_dir_in(desc) ? 'I' : 'O'; - if (speed == USB_SPEED_HIGH) { - switch (usb_endpoint_maxp(desc) & (0x03 << 11)) { - case 1 << 11: - bandwidth = 2; break; - case 2 << 11: - bandwidth = 3; break; - } - } + if (speed == USB_SPEED_HIGH) + bandwidth = usb_endpoint_maxp_mult(desc); /* this isn't checking for illegal values */ switch (usb_endpoint_type(desc)) { case USB_ENDPOINT_XFER_CONTROL: type = "Ctrl"; - if (speed == USB_SPEED_HIGH) /* uframes per NAK */ - interval = desc->bInterval; - else - interval = 0; dir = 'B'; /* ctrl is bidirectional */ break; case USB_ENDPOINT_XFER_ISOC: type = "Isoc"; - interval = 1 << (desc->bInterval - 1); break; case USB_ENDPOINT_XFER_BULK: type = "Bulk"; - if (speed == USB_SPEED_HIGH && dir == 'O') /* uframes per NAK */ - interval = desc->bInterval; - else - interval = 0; break; case USB_ENDPOINT_XFER_INT: type = "Int."; - if (speed == USB_SPEED_HIGH || speed == USB_SPEED_SUPER) - interval = 1 << (desc->bInterval - 1); - else - interval = desc->bInterval; break; default: /* "can't happen" */ return start; } - interval *= (speed == USB_SPEED_HIGH || - speed == USB_SPEED_SUPER) ? 125 : 1000; - if (interval % 1000) + + interval = usb_decode_interval(desc, speed); + if (interval % 1000) { unit = 'u'; - else { + } else { unit = 'm'; interval /= 1000; } start += sprintf(start, format_endpt, desc->bEndpointAddress, dir, desc->bmAttributes, type, - (usb_endpoint_maxp(desc) & 0x07ff) * + usb_endpoint_maxp(desc) * bandwidth, interval, unit); return start; @@ -286,8 +228,6 @@ static char *usb_dump_interface(int speed, char *start, char *end, start = usb_dump_interface_descriptor(start, end, intfc, iface, setno); for (i = 0; i < desc->desc.bNumEndpoints; i++) { - if (start > end) - return start; start = usb_dump_endpoint_descriptor(speed, start, end, &desc->endpoint[i].desc); } @@ -322,7 +262,7 @@ static char *usb_dump_config_descriptor(char *start, char *end, if (start > end) return start; - if (speed == USB_SPEED_SUPER) + if (speed >= USB_SPEED_SUPER) mul = 8; else mul = 2; @@ -360,8 +300,6 @@ static char *usb_dump_config(int speed, char *start, char *end, intfc = config->intf_cache[i]; interface = config->interface[i]; for (j = 0; j < intfc->num_altsetting; j++) { - if (start > end) - return start; start = usb_dump_interface(speed, start, end, intfc, interface, j); } @@ -427,19 +365,11 @@ static char *usb_dump_desc(char *start, char *end, struct usb_device *dev) { int i; - if (start > end) - return start; - start = usb_dump_device_descriptor(start, end, &dev->descriptor); - if (start > end) - return start; - start = usb_dump_device_strings(start, end, dev); for (i = 0; i < dev->descriptor.bNumConfigurations; i++) { - if (start > end) - return start; start = usb_dump_config(dev->speed, start, end, dev->config + i, /* active ? */ @@ -448,41 +378,6 @@ static char *usb_dump_desc(char *start, char *end, struct usb_device *dev) return start; } - -#ifdef PROC_EXTRA /* TBD: may want to add this code later */ - -static char *usb_dump_hub_descriptor(char *start, char *end, - const struct usb_hub_descriptor *desc) -{ - int leng = USB_DT_HUB_NONVAR_SIZE; - unsigned char *ptr = (unsigned char *)desc; - - if (start > end) - return start; - start += sprintf(start, "Interface:"); - while (leng && start <= end) { - start += sprintf(start, " %02x", *ptr); - ptr++; leng--; - } - *start++ = '\n'; - return start; -} - -static char *usb_dump_string(char *start, char *end, - const struct usb_device *dev, char *id, int index) -{ - if (start > end) - return start; - start += sprintf(start, "Interface:"); - if (index <= dev->maxstring && dev->stringindex && - dev->stringindex[index]) - start += sprintf(start, "%s: %.100s ", id, - dev->stringindex[index]); - return start; -} - -#endif /* PROC_EXTRA */ - /*****************************************************************/ /* This is a recursive function. Parameters: @@ -529,11 +424,12 @@ static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes, case USB_SPEED_UNKNOWN: /* usb 1.1 root hub code */ case USB_SPEED_FULL: speed = "12"; break; - case USB_SPEED_WIRELESS: /* Wireless has no real fixed speed */ case USB_SPEED_HIGH: speed = "480"; break; case USB_SPEED_SUPER: speed = "5000"; break; + case USB_SPEED_SUPER_PLUS: + speed = "10000"; break; default: speed = "??"; } @@ -553,7 +449,7 @@ static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes, /* super/high speed reserves 80%, full/low reserves 90% */ if (usbdev->speed == USB_SPEED_HIGH || - usbdev->speed == USB_SPEED_SUPER) + usbdev->speed >= USB_SPEED_SUPER) max = 800; else max = FRAME_TIME_MAX_USECS_ALLOC; @@ -616,17 +512,16 @@ static ssize_t usb_device_read(struct file *file, char __user *buf, struct usb_bus *bus; ssize_t ret, total_written = 0; loff_t skip_bytes = *ppos; + int id; if (*ppos < 0) return -EINVAL; if (nbytes <= 0) return 0; - if (!access_ok(VERIFY_WRITE, buf, nbytes)) - return -EFAULT; - mutex_lock(&usb_bus_list_lock); + mutex_lock(&usb_bus_idr_lock); /* print devices for all busses */ - list_for_each_entry(bus, &usb_bus_list, bus_list) { + idr_for_each_entry(&usb_bus_idr, bus, id) { /* recurse through all children of the root hub */ if (!bus_to_hcd(bus)->rh_registered) continue; @@ -635,58 +530,16 @@ static ssize_t usb_device_read(struct file *file, char __user *buf, bus->root_hub, bus, 0, 0, 0); usb_unlock_device(bus->root_hub); if (ret < 0) { - mutex_unlock(&usb_bus_list_lock); + mutex_unlock(&usb_bus_idr_lock); return ret; } total_written += ret; } - mutex_unlock(&usb_bus_list_lock); + mutex_unlock(&usb_bus_idr_lock); return total_written; } -/* Kernel lock for "lastev" protection */ -static unsigned int usb_device_poll(struct file *file, - struct poll_table_struct *wait) -{ - unsigned int event_count; - - poll_wait(file, &device_event.wait, wait); - - event_count = atomic_read(&device_event.count); - if (file->f_version != event_count) { - file->f_version = event_count; - return POLLIN | POLLRDNORM; - } - - return 0; -} - -static loff_t usb_device_lseek(struct file *file, loff_t offset, int orig) -{ - loff_t ret; - - mutex_lock(&file_inode(file)->i_mutex); - - switch (orig) { - case 0: - file->f_pos = offset; - ret = file->f_pos; - break; - case 1: - file->f_pos += offset; - ret = file->f_pos; - break; - case 2: - default: - ret = -EINVAL; - } - - mutex_unlock(&file_inode(file)->i_mutex); - return ret; -} - const struct file_operations usbfs_devices_fops = { - .llseek = usb_device_lseek, + .llseek = no_seek_end_llseek, .read = usb_device_read, - .poll = usb_device_poll, }; |