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-rw-r--r--drivers/usb/devices.c526
1 files changed, 526 insertions, 0 deletions
diff --git a/drivers/usb/devices.c b/drivers/usb/devices.c
new file mode 100644
index 000000000..1fc6d5001
--- /dev/null
+++ b/drivers/usb/devices.c
@@ -0,0 +1,526 @@
+/*
+ * devices.c
+ * (C) Copyright 1999 Randy Dunlap.
+ * (C) Copyright 1999,2000 Thomas Sailer <sailer@ife.ee.ethz.ch>. (proc file per device)
+ * (C) Copyright 1999 Deti Fliegl (new USB architecture)
+ *
+ * $id$
+ *
+ * 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
+ * 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
+ * the data. Having only one file for ./devices also prevents race
+ * conditions that could arise if a program was reading device info
+ * for devices that are being removed (unplugged). (That is, the
+ * program may find a directory for devnum_12 then try to open it,
+ * but it was just unplugged, so the directory is now deleted.
+ * But programs would just have to be prepared for situations like
+ * this in any plug-and-play environment.)
+ *
+ * 1999-12-16: Thomas Sailer <sailer@ife.ee.ethz.ch>
+ * 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
+ * up an eventual usbd
+ * 2000-01-04: Thomas Sailer <sailer@ife.ee.ethz.ch>
+ * Turned into its own filesystem
+ *
+ * $Id: devices.c,v 1.5 2000/01/11 13:58:21 tom Exp $
+ */
+
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <asm/uaccess.h>
+
+#include "usb.h"
+#include "usbdevice_fs.h"
+
+#define MAX_TOPO_LEVEL 6
+
+/* Define ALLOW_SERIAL_NUMBER if you want to see the serial number of devices */
+#define ALLOW_SERIAL_NUMBER
+
+static char *format_topo =
+/* T: Bus=dd Lev=dd Prnt=dd Port=dd Cnt=dd Dev#=ddd Spd=ddd MxCh=dd */
+ "T: Bus=%2.2d Lev=%2.2d Prnt=%2.2d Port=%2.2d Cnt=%2.2d Dev#=%3d Spd=%3s MxCh=%2d\n";
+
+static char *format_string_manufacturer =
+/* S: Manufacturer=xxxx */
+ "S: Manufacturer=%.100s\n";
+
+static char *format_string_product =
+/* S: Product=xxxx */
+ "S: Product=%.100s\n";
+
+#ifdef ALLOW_SERIAL_NUMBER
+static char *format_string_serialnumber =
+/* S: SerialNumber=xxxx */
+ "S: SerialNumber=%.100s\n";
+#endif
+
+static char *format_bandwidth =
+/* B: Alloc=ddd/ddd us (xx%), #Int=ddd, #Iso=ddd */
+ "B: Alloc=%3d/%3d us (%2d%%), #Int=%3d, #Iso=%3d\n";
+
+static char *format_device1 =
+/* D: Ver=xx.xx Cls=xx(sssss) Sub=xx Prot=xx MxPS=dd #Cfgs=dd */
+ "D: Ver=%2x.%02x Cls=%02x(%-5s) Sub=%02x Prot=%02x MxPS=%2d #Cfgs=%3d\n";
+
+static char *format_device2 =
+/* P: Vendor=xxxx ProdID=xxxx Rev=xx.xx */
+ "P: Vendor=%04x ProdID=%04x Rev=%2x.%02x\n";
+
+static char *format_config =
+/* C: #Ifs=dd Cfg#=dd Atr=xx MPwr=dddmA */
+ "C:%c #Ifs=%2d Cfg#=%2d Atr=%02x MxPwr=%3dmA\n";
+
+static char *format_iface =
+/* I: If#=dd Alt=dd #EPs=dd Cls=xx(sssss) Sub=xx Prot=xx Driver=xxxx*/
+ "I: If#=%2d Alt=%2d #EPs=%2d Cls=%02x(%-5s) Sub=%02x Prot=%02x Driver=%s\n";
+
+static char *format_endpt =
+/* E: Ad=xx(s) Atr=xx(ssss) MxPS=dddd Ivl=dddms */
+ "E: Ad=%02x(%c) Atr=%02x(%-4s) MxPS=%4d Ivl=%3dms\n";
+
+
+/*
+ * Need access to the driver and USB bus lists.
+ * extern struct list_head usb_driver_list;
+ * extern struct list_head usb_bus_list;
+ * However, these will come from functions that return ptrs to each of them.
+ */
+
+static DECLARE_WAIT_QUEUE_HEAD(deviceconndiscwq);
+static unsigned int conndiscevcnt = 0;
+
+/* this struct stores the poll state for <mountpoint>/devices pollers */
+struct usb_device_status {
+ unsigned int lastev;
+};
+
+struct class_info {
+ int class;
+ char *class_name;
+};
+
+static const struct class_info clas_info[] =
+{ /* max. 5 chars. per name string */
+ {USB_CLASS_PER_INTERFACE, ">ifc"},
+ {USB_CLASS_AUDIO, "audio"},
+ {USB_CLASS_COMM, "comm."},
+ {USB_CLASS_HID, "HID"},
+ {USB_CLASS_HUB, "hub"},
+ {USB_CLASS_PRINTER, "print"},
+ {USB_CLASS_MASS_STORAGE, "stor."},
+ {USB_CLASS_DATA, "data"},
+ {USB_CLASS_VENDOR_SPEC, "vend."},
+ {-1, "unk."} /* leave as last */
+};
+
+/*****************************************************************/
+
+void usbdevfs_conn_disc_event(void)
+{
+ wake_up(&deviceconndiscwq);
+ conndiscevcnt++;
+}
+
+static const char *class_decode(const int class)
+{
+ int ix;
+
+ for (ix = 0; clas_info[ix].class != -1; ix++)
+ if (clas_info[ix].class == class)
+ break;
+ return (clas_info[ix].class_name);
+}
+
+static char *usb_dump_endpoint_descriptor(char *start, char *end, const struct usb_endpoint_descriptor *desc)
+{
+ char *EndpointType [4] = {"Ctrl", "Isoc", "Bulk", "Int."};
+
+ if (start > end)
+ return start;
+ start += sprintf(start, format_endpt, desc->bEndpointAddress,
+ (desc->bEndpointAddress & USB_DIR_IN) ? 'I' : 'O',
+ desc->bmAttributes, EndpointType[desc->bmAttributes & 3],
+ desc->wMaxPacketSize, desc->bInterval);
+ return start;
+}
+
+static char *usb_dump_endpoint(char *start, char *end, const struct usb_endpoint_descriptor *endpoint)
+{
+ return usb_dump_endpoint_descriptor(start, end, endpoint);
+}
+
+static char *usb_dump_interface_descriptor(char *start, char *end, const struct usb_interface *iface, int setno)
+{
+ struct usb_interface_descriptor *desc = &iface->altsetting[setno];
+
+ if (start > end)
+ return start;
+ start += sprintf(start, format_iface,
+ desc->bInterfaceNumber,
+ desc->bAlternateSetting,
+ desc->bNumEndpoints,
+ desc->bInterfaceClass,
+ class_decode(desc->bInterfaceClass),
+ desc->bInterfaceSubClass,
+ desc->bInterfaceProtocol,
+ iface->driver ? iface->driver->name : "(none)");
+ return start;
+}
+
+static char *usb_dump_interface(char *start, char *end, const struct usb_interface *iface, int setno)
+{
+ struct usb_interface_descriptor *desc = &iface->altsetting[setno];
+ int i;
+
+ start = usb_dump_interface_descriptor(start, end, iface, setno);
+ for (i = 0; i < desc->bNumEndpoints; i++) {
+ if (start > end)
+ return start;
+ start = usb_dump_endpoint(start, end, desc->endpoint + i);
+ }
+ return start;
+}
+
+/* TBD:
+ * 0. TBDs
+ * 1. marking active config and ifaces (code lists all, but should mark
+ * which ones are active, if any)
+ * 2. add <halted> status to each endpoint line
+ */
+
+static char *usb_dump_config_descriptor(char *start, char *end, const struct usb_config_descriptor *desc, int active)
+{
+ if (start > end)
+ return start;
+ start += sprintf(start, format_config,
+ active ? '*' : ' ', /* mark active/actual/current cfg. */
+ desc->bNumInterfaces,
+ desc->bConfigurationValue,
+ desc->bmAttributes,
+ desc->MaxPower * 2);
+ return start;
+}
+
+static char *usb_dump_config(char *start, char *end, const struct usb_config_descriptor *config, int active)
+{
+ int i, j;
+ struct usb_interface *interface;
+
+ if (start > end)
+ return start;
+ if (!config) /* getting these some in 2.3.7; none in 2.3.6 */
+ return start + sprintf(start, "(null Cfg. desc.)\n");
+ start = usb_dump_config_descriptor(start, end, config, active);
+ for (i = 0; i < config->bNumInterfaces; i++) {
+ interface = config->interface + i;
+ if (!interface)
+ break;
+ for (j = 0; j < interface->num_altsetting; j++) {
+ if (start > end)
+ return start;
+ start = usb_dump_interface(start, end, interface, j);
+ }
+ }
+ return start;
+}
+
+/*
+ * Dump the different USB descriptors.
+ */
+static char *usb_dump_device_descriptor(char *start, char *end, const struct usb_device_descriptor *desc)
+{
+ if (start > end)
+ return start;
+ start += sprintf (start, format_device1,
+ desc->bcdUSB >> 8, desc->bcdUSB & 0xff,
+ desc->bDeviceClass,
+ class_decode (desc->bDeviceClass),
+ desc->bDeviceSubClass,
+ desc->bDeviceProtocol,
+ desc->bMaxPacketSize0,
+ desc->bNumConfigurations);
+ if (start > end)
+ return start;
+ start += sprintf(start, format_device2,
+ desc->idVendor, desc->idProduct,
+ desc->bcdDevice >> 8, desc->bcdDevice & 0xff);
+ return start;
+}
+
+/*
+ * Dump the different strings that this device holds.
+ */
+static char *usb_dump_device_strings (char *start, char *end, struct usb_device *dev)
+{
+ char *buf;
+
+ if (start > end)
+ return start;
+ buf = kmalloc(128, GFP_KERNEL);
+ if (!buf)
+ return start;
+ if (dev->descriptor.iManufacturer) {
+ if (usb_string(dev, dev->descriptor.iManufacturer, buf, 128) > 0)
+ start += sprintf(start, format_string_manufacturer, buf);
+ }
+ if (start > end)
+ goto out;
+ if (dev->descriptor.iProduct) {
+ if (usb_string(dev, dev->descriptor.iProduct, buf, 128) > 0)
+ start += sprintf(start, format_string_product, buf);
+ }
+ if (start > end)
+ goto out;
+#ifdef ALLOW_SERIAL_NUMBER
+ if (dev->descriptor.iSerialNumber) {
+ if (usb_string(dev, dev->descriptor.iSerialNumber, buf, 128) > 0)
+ start += sprintf(start, format_string_serialnumber, buf);
+ }
+#endif
+ out:
+ kfree(buf);
+ return start;
+}
+
+static char *usb_dump_desc(char *start, char *end, const 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(start, end, dev->config + i,
+ (dev->config + i) == dev->actconfig); /* active ? */
+ }
+ 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 */
+
+/*****************************************************************/
+
+static char *usb_device_dump(char *start, char *end, const struct usb_device *usbdev,
+ int bus, int level, int index, int count)
+{
+ int chix;
+ int cnt = 0;
+ int parent_devnum = 0;
+
+ if (level > MAX_TOPO_LEVEL)
+ return start;
+ if (usbdev->parent && usbdev->parent->devnum != -1)
+ parent_devnum = usbdev->parent->devnum;
+ /*
+ * So the root hub's parent is 0 and any device that is
+ * plugged into the root hub has a parent of 0.
+ */
+ start += sprintf(start, format_topo, bus, level, parent_devnum, index, count,
+ usbdev->devnum, usbdev->slow ? "1.5" : "12 ", usbdev->maxchild);
+ /*
+ * level = topology-tier level;
+ * parent_devnum = parent device number;
+ * index = parent's connector number;
+ * count = device count at this level
+ */
+ /* do not dump descriptors for root hub */
+ if (usbdev->devnum >= 0)
+ start = usb_dump_desc(start, end, usbdev);
+ if (start > end)
+ return start + sprintf(start, "(truncated)\n");
+ /* Now look at all of this device's children. */
+ for (chix = 0; chix < usbdev->maxchild; chix++) {
+ if (start > end)
+ return start;
+ if (usbdev->children[chix])
+ start = usb_device_dump(start, end, usbdev->children[chix], bus, level + 1, chix, ++cnt);
+ }
+ return start;
+}
+
+static ssize_t usb_device_read(struct file *file, char *buf, size_t nbytes, loff_t *ppos)
+{
+ struct list_head *buslist;
+ struct usb_bus *bus;
+ char *page, *end;
+ ssize_t ret = 0;
+ unsigned int pos, len;
+
+ if (*ppos < 0)
+ return -EINVAL;
+ if (nbytes <= 0)
+ return 0;
+ if (!access_ok(VERIFY_WRITE, buf, nbytes))
+ return -EFAULT;
+ if (!(page = (char*) __get_free_pages(GFP_KERNEL,1)))
+ return -ENOMEM;
+ pos = *ppos;
+ /* enumerate busses */
+ for (buslist = usb_bus_list.next; buslist != &usb_bus_list; buslist = buslist->next) {
+ /* print bandwidth allocation */
+ bus = list_entry(buslist, struct usb_bus, bus_list);
+ len = sprintf(page, format_bandwidth, bus->bandwidth_allocated, FRAME_TIME_MAX_USECS_ALLOC,
+ (100 * bus->bandwidth_allocated + FRAME_TIME_MAX_USECS_ALLOC / 2) / FRAME_TIME_MAX_USECS_ALLOC,
+ bus->bandwidth_int_reqs, bus->bandwidth_isoc_reqs);
+ end = usb_device_dump(page + len, page + (2*PAGE_SIZE - 256), bus->root_hub, bus->busnum, 0, 0, 0);
+ len = end - page;
+ if (len > pos) {
+ len -= pos;
+ if (len > nbytes)
+ len = nbytes;
+ if (copy_to_user(buf, page + pos, len)) {
+ if (!ret)
+ ret = -EFAULT;
+ break;
+ }
+ nbytes -= len;
+ buf += len;
+ ret += len;
+ pos = 0;
+ *ppos += len;
+ } else
+ pos -= len;
+ }
+ free_pages((unsigned long)page, 1);
+ return ret;
+}
+
+static unsigned int usb_device_poll(struct file *file, struct poll_table_struct *wait)
+{
+ struct usb_device_status *st = (struct usb_device_status *)file->private_data;
+ unsigned int mask = 0;
+
+ if (!st) {
+ st = kmalloc(sizeof(struct usb_device_status), GFP_KERNEL);
+ if (!st)
+ return POLLIN;
+ /*
+ * need to prevent the module from being unloaded, since
+ * proc_unregister does not call the release method and
+ * we would have a memory leak
+ */
+ st->lastev = conndiscevcnt;
+ file->private_data = st;
+ mask = POLLIN;
+ }
+ if (file->f_mode & FMODE_READ)
+ poll_wait(file, &deviceconndiscwq, wait);
+ if (st->lastev != conndiscevcnt)
+ mask |= POLLIN;
+ st->lastev = conndiscevcnt;
+ return mask;
+}
+
+static int usb_device_open(struct inode *inode, struct file *file)
+{
+ file->private_data = NULL;
+ return 0;
+}
+
+static int usb_device_release(struct inode *inode, struct file *file)
+{
+ if (file->private_data) {
+ kfree(file->private_data);
+ file->private_data = NULL;
+ }
+
+ return 0;
+}
+
+static long long usb_device_lseek(struct file * file, long long offset, int orig)
+{
+ switch (orig) {
+ case 0:
+ file->f_pos = offset;
+ return file->f_pos;
+
+ case 1:
+ file->f_pos += offset;
+ return file->f_pos;
+
+ case 2:
+ return -EINVAL;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+struct file_operations usbdevfs_devices_fops = {
+ usb_device_lseek, /* lseek */
+ usb_device_read, /* read */
+ NULL, /* write */
+ NULL, /* readdir */
+ usb_device_poll, /* poll */
+ NULL, /* ioctl */
+ NULL, /* mmap */
+ usb_device_open, /* open */
+ NULL, /* flush */
+ usb_device_release, /* release */
+ NULL /* fsync */
+};
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