1070 lines
29 KiB
C
1070 lines
29 KiB
C
/*
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*
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* Most of this source has been derived from the Linux USB
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* project:
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* (C) Copyright Linus Torvalds 1999
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* (C) Copyright Johannes Erdfelt 1999-2001
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* (C) Copyright Andreas Gal 1999
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* (C) Copyright Gregory P. Smith 1999
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* (C) Copyright Deti Fliegl 1999 (new USB architecture)
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* (C) Copyright Randy Dunlap 2000
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* (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id)
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* (C) Copyright Yggdrasil Computing, Inc. 2000
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* (usb_device_id matching changes by Adam J. Richter)
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*
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* Adapted for barebox:
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* (C) Copyright 2001 Denis Peter, MPL AG Switzerland
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*
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*/
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/*
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* How it works:
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*
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* Since this is a bootloader, the devices will not be automatic
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* (re)configured on hotplug, but after a restart of the USB the
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* device should work.
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*
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* For each transfer (except "Interrupt") we wait for completion.
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*/
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#include <common.h>
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#include <command.h>
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#include <malloc.h>
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#include <driver.h>
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#include <linux/ctype.h>
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#include <asm/byteorder.h>
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#include <xfuncs.h>
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#include <init.h>
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#include <dma.h>
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#include <usb/usb.h>
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#include <usb/ch9.h>
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#include "usb.h"
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#include "hub.h"
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/* #define USB_DEBUG */
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#ifdef USB_DEBUG
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#define USB_PRINTF(fmt, args...) printf(fmt , ##args)
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#else
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#define USB_PRINTF(fmt, args...)
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#endif
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#define USB_BUFSIZ 512
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static int dev_count;
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static int dev_index;
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static int asynch_allowed;
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static LIST_HEAD(host_list);
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LIST_HEAD(usb_device_list);
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static void print_usb_device(struct usb_device *dev)
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{
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pr_info("Bus %03d Device %03d: ID %04x:%04x %s\n",
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dev->host->busnum, dev->devnum,
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dev->descriptor->idVendor,
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dev->descriptor->idProduct,
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dev->prod);
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}
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static int host_busnum = 1;
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int usb_register_host(struct usb_host *host)
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{
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list_add_tail(&host->list, &host_list);
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host->busnum = host_busnum++;
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asynch_allowed = 1;
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return 0;
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}
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/**
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* set configuration number to configuration
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*/
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static int usb_set_configuration(struct usb_device *dev, int configuration)
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{
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int res;
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USB_PRINTF("set configuration %d\n", configuration);
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/* set setup command */
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res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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USB_REQ_SET_CONFIGURATION, 0,
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configuration, 0,
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NULL, 0, USB_CNTL_TIMEOUT);
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if (res == 0) {
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dev->toggle[0] = 0;
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dev->toggle[1] = 0;
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return 0;
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} else
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return -1;
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}
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/* The routine usb_set_maxpacket_ep() is extracted from the loop of routine
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* usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
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* when it is inlined in 1 single routine. What happens is that the register r3
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* is used as loop-count 'i', but gets overwritten later on.
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* This is clearly a compiler bug, but it is easier to workaround it here than
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* to update the compiler (Occurs with at least several GCC 4.{1,2},x
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* CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
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*/
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static void noinline
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usb_set_maxpacket_ep(struct usb_device *dev, struct usb_endpoint_descriptor *ep)
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{
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int b;
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b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
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if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
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USB_ENDPOINT_XFER_CONTROL) {
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/* Control => bidirectional */
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dev->epmaxpacketout[b] = ep->wMaxPacketSize;
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dev->epmaxpacketin[b] = ep->wMaxPacketSize;
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USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
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b, dev->epmaxpacketin[b]);
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} else {
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if ((ep->bEndpointAddress & 0x80) == 0) {
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/* OUT Endpoint */
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if (ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
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dev->epmaxpacketout[b] = ep->wMaxPacketSize;
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USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
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b, dev->epmaxpacketout[b]);
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}
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} else {
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/* IN Endpoint */
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if (ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
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dev->epmaxpacketin[b] = ep->wMaxPacketSize;
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USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
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b, dev->epmaxpacketin[b]);
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}
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} /* if out */
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} /* if control */
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}
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/*
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* set the max packed value of all endpoints in the given configuration
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*/
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static int usb_set_maxpacket(struct usb_device *dev)
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{
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int i, ii;
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for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
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for (ii = 0; ii < dev->config.interface[i].desc.bNumEndpoints; ii++)
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usb_set_maxpacket_ep(dev,
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&dev->config.interface[i].ep_desc[ii]);
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return 0;
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}
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/**
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* Parse the config, located in buffer, and fills the dev->config structure.
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* Note that all little/big endian swapping are done automatically.
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*/
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static int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
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{
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struct usb_descriptor_header *head;
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int index, ifno, epno, curr_if_num;
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int i;
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unsigned char *ch;
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ifno = -1;
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epno = -1;
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curr_if_num = -1;
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dev->configno = cfgno;
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head = (struct usb_descriptor_header *) &buffer[0];
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if (head->bDescriptorType != USB_DT_CONFIG) {
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printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
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head->bDescriptorType);
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return -1;
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}
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memcpy(&dev->config, buffer, buffer[0]);
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le16_to_cpus(&(dev->config.wTotalLength));
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dev->config.no_of_if = 0;
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index = dev->config.desc.bLength;
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/* Ok the first entry must be a configuration entry,
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* now process the others */
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head = (struct usb_descriptor_header *) &buffer[index];
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while (index + 1 < dev->config.desc.wTotalLength) {
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switch (head->bDescriptorType) {
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case USB_DT_INTERFACE:
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if (((struct usb_interface_descriptor *) \
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&buffer[index])->bInterfaceNumber != curr_if_num) {
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/* this is a new interface, copy new desc */
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ifno = dev->config.no_of_if;
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/* if ifno > USB_MAXINTERFACES, then
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* next memcpy() will corrupt dev->config
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*/
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if (ifno > USB_MAXINTERFACES) {
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printf("ifno = %d > "
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"USB_MAXINTERFACES = %d !\n",
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ifno,
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USB_MAXINTERFACES);
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break;
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}
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dev->config.no_of_if++;
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memcpy(&dev->config.interface[ifno].desc,
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&buffer[index], buffer[index]);
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dev->config.interface[ifno].no_of_ep = 0;
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dev->config.interface[ifno].num_altsetting = 1;
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curr_if_num =
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dev->config.interface[ifno].desc.bInterfaceNumber;
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} else {
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/* found alternate setting for the interface */
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dev->config.interface[ifno].num_altsetting++;
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}
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break;
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case USB_DT_ENDPOINT:
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epno = dev->config.interface[ifno].no_of_ep;
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/* found an endpoint */
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dev->config.interface[ifno].no_of_ep++;
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memcpy(&dev->config.interface[ifno].ep_desc[epno],
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&buffer[index], buffer[index]);
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le16_to_cpus(&(dev->config.interface[ifno].ep_desc[epno].\
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wMaxPacketSize));
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USB_PRINTF("if %d, ep %d\n", ifno, epno);
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break;
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default:
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if (head->bLength == 0)
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return 1;
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USB_PRINTF("unknown Description Type : %x\n",
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head->bDescriptorType);
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{
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ch = (unsigned char *)head;
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for (i = 0; i < head->bLength; i++)
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USB_PRINTF("%02X ", *ch++);
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USB_PRINTF("\n\n\n");
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}
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break;
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}
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index += head->bLength;
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head = (struct usb_descriptor_header *)&buffer[index];
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}
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return 1;
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}
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/**
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* set address of a device to the value in dev->devnum.
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* This can only be done by addressing the device via the default address (0)
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*/
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static int usb_set_address(struct usb_device *dev)
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{
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int res;
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USB_PRINTF("set address %d\n", dev->devnum);
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res = usb_control_msg(dev, usb_snddefctrl(dev),
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USB_REQ_SET_ADDRESS, 0,
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(dev->devnum), 0,
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NULL, 0, USB_CNTL_TIMEOUT);
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return res;
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}
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static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
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unsigned char index, void *buf, int size)
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{
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int res;
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res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
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(type << 8) + index, 0,
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buf, size, USB_CNTL_TIMEOUT);
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return res;
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}
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/*
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* By the time we get here, the device has gotten a new device ID
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* and is in the default state. We need to identify the thing and
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* get the ball rolling..
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*
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* Returns 0 for success, != 0 for error.
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*/
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int usb_new_device(struct usb_device *dev)
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{
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int addr, err;
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int tmp;
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void *buf;
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struct usb_device_descriptor *desc;
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struct usb_device *parent = dev->parent;
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unsigned short portstatus;
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char str[16];
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buf = dma_alloc(USB_BUFSIZ);
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/* We still haven't set the Address yet */
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addr = dev->devnum;
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dev->devnum = 0;
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/* This is a Windows scheme of initialization sequence, with double
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* reset of the device (Linux uses the same sequence)
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* Some equipment is said to work only with such init sequence; this
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* patch is based on the work by Alan Stern:
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* http://sourceforge.net/mailarchive/forum.php?
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* thread_id=5729457&forum_id=5398
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*/
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/* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
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* only 18 bytes long, this will terminate with a short packet. But if
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* the maxpacket size is 8 or 16 the device may be waiting to transmit
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* some more, or keeps on retransmitting the 8 byte header. */
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desc = buf;
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dev->descriptor->bMaxPacketSize0 = 64; /* Start off at 64 bytes */
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/* Default to 64 byte max packet size */
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dev->maxpacketsize = PACKET_SIZE_64;
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dev->epmaxpacketin[0] = 64;
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dev->epmaxpacketout[0] = 64;
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err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
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if (err < 0) {
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USB_PRINTF("%s: usb_get_descriptor() failed with %d\n", __func__, err);
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goto err_out;
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}
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dev->descriptor->bMaxPacketSize0 = desc->bMaxPacketSize0;
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/* find the port number we're at */
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if (parent) {
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/* reset the port for the second time */
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err = hub_port_reset(dev->parent, dev->portnr - 1, &portstatus);
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if (err < 0) {
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printf("\n Couldn't reset port %i\n", dev->portnr);
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goto err_out;
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}
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}
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dev->epmaxpacketin[0] = dev->descriptor->bMaxPacketSize0;
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dev->epmaxpacketout[0] = dev->descriptor->bMaxPacketSize0;
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switch (dev->descriptor->bMaxPacketSize0) {
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case 8:
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dev->maxpacketsize = PACKET_SIZE_8;
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break;
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case 16:
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dev->maxpacketsize = PACKET_SIZE_16;
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break;
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case 32:
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dev->maxpacketsize = PACKET_SIZE_32;
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break;
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case 64:
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dev->maxpacketsize = PACKET_SIZE_64;
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break;
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}
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dev->devnum = addr;
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err = usb_set_address(dev); /* set address */
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if (err < 0) {
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printf("\n USB device not accepting new address " \
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"(error=%lX)\n", dev->status);
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goto err_out;
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}
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mdelay(10); /* Let the SET_ADDRESS settle */
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tmp = sizeof(*dev->descriptor);
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err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
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dev->descriptor, sizeof(*dev->descriptor));
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if (err < tmp) {
|
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if (err < 0)
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printf("unable to get device descriptor (error=%d)\n",
|
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err);
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else
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printf("USB device descriptor short read " \
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"(expected %i, got %i)\n", tmp, err);
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goto err_out;
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}
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/* correct le values */
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le16_to_cpus(&dev->descriptor->bcdUSB);
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le16_to_cpus(&dev->descriptor->idVendor);
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le16_to_cpus(&dev->descriptor->idProduct);
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le16_to_cpus(&dev->descriptor->bcdDevice);
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/* only support for one config for now */
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usb_get_configuration_no(dev, buf, 0);
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usb_parse_config(dev, buf, 0);
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usb_set_maxpacket(dev);
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/* we set the default configuration here */
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if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
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printf("failed to set default configuration " \
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"len %d, status %lX\n", dev->act_len, dev->status);
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goto err_out;
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}
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USB_PRINTF("new device: Mfr=%d, Product=%d, SerialNumber=%d\n",
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dev->descriptor->iManufacturer, dev->descriptor->iProduct,
|
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dev->descriptor->iSerialNumber);
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memset(dev->mf, 0, sizeof(dev->mf));
|
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memset(dev->prod, 0, sizeof(dev->prod));
|
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memset(dev->serial, 0, sizeof(dev->serial));
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if (dev->descriptor->iManufacturer)
|
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usb_string(dev, dev->descriptor->iManufacturer,
|
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dev->mf, sizeof(dev->mf));
|
|
if (dev->descriptor->iProduct)
|
|
usb_string(dev, dev->descriptor->iProduct,
|
|
dev->prod, sizeof(dev->prod));
|
|
if (dev->descriptor->iSerialNumber)
|
|
usb_string(dev, dev->descriptor->iSerialNumber,
|
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dev->serial, sizeof(dev->serial));
|
|
|
|
if (parent) {
|
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sprintf(dev->dev.name, "%s-%d", parent->dev.name, dev->portnr - 1);
|
|
} else {
|
|
sprintf(dev->dev.name, "usb%d", dev->host->busnum);
|
|
}
|
|
|
|
dev->dev.id = DEVICE_ID_SINGLE;
|
|
|
|
print_usb_device(dev);
|
|
|
|
err = register_device(&dev->dev);
|
|
if (err) {
|
|
printf("Failed to register device: %s\n", strerror(-err));
|
|
goto err_out;
|
|
}
|
|
|
|
dev_add_param_int_ro(&dev->dev, "iManufacturer",
|
|
dev->descriptor->iManufacturer, "%d");
|
|
dev_add_param_int_ro(&dev->dev, "iProduct",
|
|
dev->descriptor->iProduct, "%d");
|
|
dev_add_param_int_ro(&dev->dev, "iSerialNumber",
|
|
dev->descriptor->iSerialNumber, "%d");
|
|
dev_add_param_fixed(&dev->dev, "iSerialNumber", str);
|
|
dev_add_param_fixed(&dev->dev, "Manufacturer", dev->mf);
|
|
dev_add_param_fixed(&dev->dev, "Product", dev->prod);
|
|
dev_add_param_fixed(&dev->dev, "SerialNumber", dev->serial);
|
|
dev_add_param_int_ro(&dev->dev, "idVendor",
|
|
le16_to_cpu(dev->descriptor->idVendor), "%04x");
|
|
dev_add_param_int_ro(&dev->dev, "idProduct",
|
|
le16_to_cpu(dev->descriptor->idProduct), "%04x");
|
|
list_add_tail(&dev->list, &usb_device_list);
|
|
dev_count++;
|
|
|
|
err = 0;
|
|
|
|
err_out:
|
|
dma_free(buf);
|
|
return err;
|
|
}
|
|
|
|
void usb_free_device(struct usb_device *usbdev)
|
|
{
|
|
dma_free(usbdev->descriptor);
|
|
dma_free(usbdev->setup_packet);
|
|
free(usbdev);
|
|
}
|
|
|
|
void usb_remove_device(struct usb_device *usbdev)
|
|
{
|
|
int i;
|
|
|
|
if (!usbdev)
|
|
return;
|
|
|
|
for (i = 0; i < usbdev->maxchild; i++)
|
|
usb_remove_device(usbdev->children[i]);
|
|
if (usbdev->parent && usbdev->portnr)
|
|
usbdev->parent->children[usbdev->portnr - 1] = NULL;
|
|
list_del(&usbdev->list);
|
|
dev_count--;
|
|
|
|
if (unregister_device(&usbdev->dev))
|
|
dev_err(&usbdev->dev, "failed to unregister\n");
|
|
else
|
|
dev_info(&usbdev->dev, "removed\n");
|
|
|
|
usb_free_device(usbdev);
|
|
}
|
|
|
|
struct usb_device *usb_alloc_new_device(void)
|
|
{
|
|
struct usb_device *usbdev = xzalloc(sizeof (*usbdev));
|
|
|
|
usbdev->devnum = ++dev_index;
|
|
usbdev->maxchild = 0;
|
|
usbdev->dev.bus = &usb_bus_type;
|
|
usbdev->setup_packet = dma_alloc(sizeof(*usbdev->setup_packet));
|
|
usbdev->descriptor = dma_alloc(sizeof(*usbdev->descriptor));
|
|
|
|
return usbdev;
|
|
}
|
|
|
|
int usb_host_detect(struct usb_host *host)
|
|
{
|
|
int ret;
|
|
|
|
if (!host->root_dev) {
|
|
ret = host->init(host);
|
|
if (ret)
|
|
return ret;
|
|
|
|
host->root_dev = usb_alloc_new_device();
|
|
host->root_dev->dev.parent = host->hw_dev;
|
|
host->root_dev->host = host;
|
|
|
|
ret = usb_new_device(host->root_dev);
|
|
if (ret) {
|
|
usb_free_device(host->root_dev);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
device_detect(&host->root_dev->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void usb_rescan(void)
|
|
{
|
|
struct usb_host *host;
|
|
int ret;
|
|
|
|
pr_info("USB: scanning bus for devices...\n");
|
|
|
|
list_for_each_entry(host, &host_list, list) {
|
|
ret = usb_host_detect(host);
|
|
if (ret)
|
|
continue;
|
|
}
|
|
|
|
pr_info("%d USB Device(s) found\n", dev_count);
|
|
}
|
|
|
|
/*
|
|
* disables the asynch behaviour of the control message. This is used for data
|
|
* transfers that uses the exclusiv access to the control and bulk messages.
|
|
*/
|
|
void usb_disable_asynch(int disable)
|
|
{
|
|
asynch_allowed = !disable;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------------------------
|
|
* Message wrappers.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* submits an Interrupt Message
|
|
*/
|
|
int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
|
|
void *buffer, int transfer_len, int interval)
|
|
{
|
|
struct usb_host *host = dev->host;
|
|
|
|
return host->submit_int_msg(dev, pipe, buffer, transfer_len, interval);
|
|
}
|
|
|
|
/*
|
|
* submits a control message and waits for completion (at least timeout * 1ms)
|
|
* If timeout is 0, we don't wait for completion (used as example to set and
|
|
* clear keyboards LEDs). For data transfers, (storage transfers) we don't
|
|
* allow control messages with 0 timeout, by previously resetting the flag
|
|
* asynch_allowed (usb_disable_asynch(1)).
|
|
* returns the transfered length if OK or -1 if error. The transfered length
|
|
* and the current status are stored in the dev->act_len and dev->status.
|
|
*/
|
|
int usb_control_msg(struct usb_device *dev, unsigned int pipe,
|
|
unsigned char request, unsigned char requesttype,
|
|
unsigned short value, unsigned short index,
|
|
void *data, unsigned short size, int timeout)
|
|
{
|
|
struct usb_host *host = dev->host;
|
|
int ret;
|
|
struct devrequest *setup_packet = dev->setup_packet;
|
|
|
|
if ((timeout == 0) && (!asynch_allowed)) {
|
|
/* request for a asynch control pipe is not allowed */
|
|
return -1;
|
|
}
|
|
|
|
/* set setup command */
|
|
setup_packet->requesttype = requesttype;
|
|
setup_packet->request = request;
|
|
setup_packet->value = cpu_to_le16(value);
|
|
setup_packet->index = cpu_to_le16(index);
|
|
setup_packet->length = cpu_to_le16(size);
|
|
USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
|
|
"value 0x%X index 0x%X length 0x%X\n",
|
|
request, requesttype, value, index, size);
|
|
dev->status = USB_ST_NOT_PROC; /*not yet processed */
|
|
|
|
ret = host->submit_control_msg(dev, pipe, data, size, setup_packet,
|
|
timeout);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return dev->act_len;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------
|
|
* submits bulk message, and waits for completion. returns 0 if Ok or
|
|
* -1 if Error.
|
|
* synchronous behavior
|
|
*/
|
|
int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
|
|
void *data, int len, int *actual_length, int timeout)
|
|
{
|
|
struct usb_host *host = dev->host;
|
|
int ret;
|
|
|
|
if (len < 0)
|
|
return -1;
|
|
|
|
dev->status = USB_ST_NOT_PROC; /* not yet processed */
|
|
ret = host->submit_bulk_msg(dev, pipe, data, len, timeout);
|
|
if (ret)
|
|
return ret;
|
|
|
|
*actual_length = dev->act_len;
|
|
|
|
return (dev->status == 0) ? 0 : -1;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------------------------
|
|
* Max Packet stuff
|
|
*/
|
|
|
|
/*
|
|
* returns the max packet size, depending on the pipe direction and
|
|
* the configurations values
|
|
*/
|
|
int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
|
|
{
|
|
/* direction is out -> use emaxpacket out */
|
|
if ((pipe & USB_DIR_IN) == 0)
|
|
return dev->epmaxpacketout[((pipe>>15) & 0xf)];
|
|
else
|
|
return dev->epmaxpacketin[((pipe>>15) & 0xf)];
|
|
}
|
|
|
|
/***********************************************************************
|
|
* Clears an endpoint
|
|
* endp: endpoint number in bits 0-3;
|
|
* direction flag in bit 7 (1 = IN, 0 = OUT)
|
|
*/
|
|
int usb_clear_halt(struct usb_device *dev, int pipe)
|
|
{
|
|
int result;
|
|
int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
|
|
|
|
result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
|
|
endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
|
|
|
|
/* don't clear if failed */
|
|
if (result < 0)
|
|
return result;
|
|
|
|
/*
|
|
* NOTE: we do not get status and verify reset was successful
|
|
* as some devices are reported to lock up upon this check..
|
|
*/
|
|
|
|
usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
|
|
|
|
/* toggle is reset on clear */
|
|
usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
|
|
return 0;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* gets configuration cfgno and store it in the buffer
|
|
*/
|
|
int usb_get_configuration_no(struct usb_device *dev,
|
|
unsigned char *buffer, int cfgno)
|
|
{
|
|
int result;
|
|
unsigned int tmp;
|
|
struct usb_config_descriptor *config;
|
|
|
|
|
|
config = (struct usb_config_descriptor *)&buffer[0];
|
|
result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
|
|
if (result < 9) {
|
|
if (result < 0)
|
|
printf("unable to get descriptor, error %lX\n",
|
|
dev->status);
|
|
else
|
|
printf("config descriptor too short " \
|
|
"(expected %i, got %i)\n", 9, result);
|
|
return -1;
|
|
}
|
|
tmp = le16_to_cpu(config->wTotalLength);
|
|
|
|
if (tmp > USB_BUFSIZ) {
|
|
USB_PRINTF("usb_get_configuration_no: failed to get " \
|
|
"descriptor - too long: %u\n", tmp);
|
|
return -1;
|
|
}
|
|
|
|
result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
|
|
USB_PRINTF("get_conf_no %d Result %d, wLength %u\n",
|
|
cfgno, result, tmp);
|
|
return result;
|
|
}
|
|
|
|
/********************************************************************
|
|
* set interface number to interface
|
|
*/
|
|
int usb_set_interface(struct usb_device *dev, int interface, int alternate)
|
|
{
|
|
struct usb_interface *if_face = NULL;
|
|
int ret, i;
|
|
|
|
for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
|
|
if (dev->config.interface[i].desc.bInterfaceNumber == interface) {
|
|
if_face = &dev->config.interface[i];
|
|
break;
|
|
}
|
|
}
|
|
if (!if_face) {
|
|
printf("selecting invalid interface %d", interface);
|
|
return -1;
|
|
}
|
|
/*
|
|
* We should return now for devices with only one alternate setting.
|
|
* According to 9.4.10 of the Universal Serial Bus Specification
|
|
* Revision 2.0 such devices can return with a STALL. This results in
|
|
* some USB sticks timeouting during initialization and then being
|
|
* unusable in barebox.
|
|
*/
|
|
if (if_face->num_altsetting == 1)
|
|
return 0;
|
|
|
|
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
|
|
alternate, interface, NULL, 0,
|
|
USB_CNTL_TIMEOUT * 5);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/********************************************************************
|
|
* set protocol to protocol
|
|
*/
|
|
int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
|
|
{
|
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
|
protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
/********************************************************************
|
|
* set idle
|
|
*/
|
|
int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
|
|
{
|
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
|
(duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
/********************************************************************
|
|
* get report
|
|
*/
|
|
int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
|
|
unsigned char id, void *buf, int size)
|
|
{
|
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
USB_REQ_GET_REPORT,
|
|
USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
|
(type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
/********************************************************************
|
|
* get class descriptor
|
|
*/
|
|
int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
|
|
unsigned char type, unsigned char id, void *buf, int size)
|
|
{
|
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
|
|
(type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
/********************************************************************
|
|
* get string index in buffer
|
|
*/
|
|
static int usb_get_string(struct usb_device *dev, unsigned short langid,
|
|
unsigned char index, void *buf, int size)
|
|
{
|
|
int i;
|
|
int result;
|
|
|
|
for (i = 0; i < 3; ++i) {
|
|
/* some devices are flaky */
|
|
result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
|
|
(USB_DT_STRING << 8) + index, langid, buf, size,
|
|
USB_CNTL_TIMEOUT);
|
|
|
|
if (result > 0)
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static void usb_try_string_workarounds(unsigned char *buf, int *length)
|
|
{
|
|
int newlength, oldlength = *length;
|
|
|
|
for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
|
|
if (!isprint(buf[newlength]) || buf[newlength + 1])
|
|
break;
|
|
|
|
if (newlength > 2) {
|
|
buf[0] = newlength;
|
|
*length = newlength;
|
|
}
|
|
}
|
|
|
|
|
|
static int usb_string_sub(struct usb_device *dev, unsigned int langid,
|
|
unsigned int index, unsigned char *buf)
|
|
{
|
|
int rc;
|
|
|
|
/* Try to read the string descriptor by asking for the maximum
|
|
* possible number of bytes */
|
|
rc = usb_get_string(dev, langid, index, buf, 255);
|
|
|
|
/* If that failed try to read the descriptor length, then
|
|
* ask for just that many bytes */
|
|
if (rc < 2) {
|
|
rc = usb_get_string(dev, langid, index, buf, 2);
|
|
if (rc == 2)
|
|
rc = usb_get_string(dev, langid, index, buf, buf[0]);
|
|
}
|
|
|
|
if (rc >= 2) {
|
|
if (!buf[0] && !buf[1])
|
|
usb_try_string_workarounds(buf, &rc);
|
|
|
|
/* There might be extra junk at the end of the descriptor */
|
|
if (buf[0] < rc)
|
|
rc = buf[0];
|
|
|
|
rc = rc - (rc & 1); /* force a multiple of two */
|
|
}
|
|
|
|
if (rc < 2)
|
|
rc = -1;
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
/********************************************************************
|
|
* usb_string:
|
|
* Get string index and translate it to ascii.
|
|
* returns string length (> 0) or error (< 0)
|
|
*/
|
|
int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
|
|
{
|
|
unsigned char mybuf[USB_BUFSIZ];
|
|
unsigned char *tbuf;
|
|
int err;
|
|
unsigned int u, idx;
|
|
|
|
if (size <= 0 || !buf || !index)
|
|
return -1;
|
|
buf[0] = 0;
|
|
tbuf = &mybuf[0];
|
|
|
|
/* get langid for strings if it's not yet known */
|
|
if (!dev->have_langid) {
|
|
err = usb_string_sub(dev, 0, 0, tbuf);
|
|
if (err < 0) {
|
|
USB_PRINTF("error getting string descriptor 0 " \
|
|
"(error=%lx)\n", dev->status);
|
|
return -1;
|
|
} else if (tbuf[0] < 4) {
|
|
USB_PRINTF("string descriptor 0 too short\n");
|
|
return -1;
|
|
} else {
|
|
dev->have_langid = -1;
|
|
dev->string_langid = tbuf[2] | (tbuf[3] << 8);
|
|
/* always use the first langid listed */
|
|
USB_PRINTF("USB device number %d default " \
|
|
"language ID 0x%x\n",
|
|
dev->devnum, dev->string_langid);
|
|
}
|
|
}
|
|
|
|
err = usb_string_sub(dev, dev->string_langid, index, tbuf);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
size--; /* leave room for trailing NULL char in output buffer */
|
|
for (idx = 0, u = 2; u < err; u += 2) {
|
|
if (idx >= size)
|
|
break;
|
|
if (tbuf[u+1]) /* high byte */
|
|
buf[idx++] = '?'; /* non-ASCII character */
|
|
else
|
|
buf[idx++] = tbuf[u];
|
|
}
|
|
buf[idx] = 0;
|
|
err = idx;
|
|
return err;
|
|
}
|
|
|
|
int usb_driver_register(struct usb_driver *drv)
|
|
{
|
|
drv->driver.name = drv->name;
|
|
drv->driver.bus = &usb_bus_type;
|
|
return register_driver(&drv->driver);
|
|
}
|
|
|
|
/* returns 0 if no match, 1 if match */
|
|
static int usb_match_device(struct usb_device *dev, const struct usb_device_id *id)
|
|
{
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
|
|
id->idVendor != le16_to_cpu(dev->descriptor->idVendor))
|
|
return 0;
|
|
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) &&
|
|
id->idProduct != le16_to_cpu(dev->descriptor->idProduct))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
/* returns 0 if no match, 1 if match */
|
|
static int usb_match_one_id(struct usb_device *usbdev,
|
|
const struct usb_device_id *id)
|
|
{
|
|
int ifno;
|
|
|
|
/* proc_connectinfo in devio.c may call us with id == NULL. */
|
|
if (id == NULL)
|
|
return 0;
|
|
|
|
if (!usb_match_device(usbdev, id))
|
|
return 0;
|
|
|
|
/* The interface class, subclass, and protocol should never be
|
|
* checked for a match if the device class is Vendor Specific,
|
|
* unless the match record specifies the Vendor ID. */
|
|
if (usbdev->descriptor->bDeviceClass == USB_CLASS_VENDOR_SPEC &&
|
|
!(id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
|
|
(id->match_flags & USB_DEVICE_ID_MATCH_INT_INFO))
|
|
return 0;
|
|
|
|
if ( (id->match_flags & USB_DEVICE_ID_MATCH_INT_INFO) ) {
|
|
/* match any interface */
|
|
for (ifno=0; ifno<usbdev->config.no_of_if; ifno++) {
|
|
struct usb_interface_descriptor *intf;
|
|
intf = &usbdev->config.interface[ifno].desc;
|
|
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) &&
|
|
(id->bInterfaceClass != intf->bInterfaceClass))
|
|
continue;
|
|
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_SUBCLASS) &&
|
|
(id->bInterfaceSubClass != intf->bInterfaceSubClass))
|
|
continue;
|
|
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_PROTOCOL) &&
|
|
(id->bInterfaceProtocol != intf->bInterfaceProtocol))
|
|
continue;
|
|
break;
|
|
}
|
|
if (ifno >= usbdev->config.no_of_if)
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
EXPORT_SYMBOL(usb_match_one_id);
|
|
|
|
static const struct usb_device_id *usb_match_id(struct usb_device *usbdev,
|
|
const struct usb_device_id *id)
|
|
{
|
|
/* proc_connectinfo in devio.c may call us with id == NULL. */
|
|
if (id == NULL)
|
|
return NULL;
|
|
|
|
/* It is important to check that id->driver_info is nonzero,
|
|
since an entry that is all zeroes except for a nonzero
|
|
id->driver_info is the way to create an entry that
|
|
indicates that the driver want to examine every
|
|
device and interface. */
|
|
for (; id->idVendor || id->idProduct || id->bDeviceClass ||
|
|
id->bInterfaceClass || id->driver_info; id++) {
|
|
if (usb_match_one_id(usbdev, id))
|
|
return id;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(usb_match_id);
|
|
|
|
static int usb_match(struct device_d *dev, struct driver_d *drv)
|
|
{
|
|
struct usb_device *usbdev = container_of(dev, struct usb_device, dev);
|
|
struct usb_driver *usbdrv = container_of(dev->driver, struct usb_driver, driver);
|
|
const struct usb_device_id *id;
|
|
|
|
debug("matching: 0x%04x 0x%04x\n", usbdev->descriptor->idVendor,
|
|
usbdev->descriptor->idProduct);
|
|
|
|
id = usb_match_id(usbdev, usbdrv->id_table);
|
|
if (id) {
|
|
debug("match: 0x%04x 0x%04x\n", id->idVendor, id->idProduct);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int usb_probe(struct device_d *dev)
|
|
{
|
|
struct usb_device *usbdev = container_of(dev, struct usb_device, dev);
|
|
struct usb_driver *usbdrv = container_of(dev->driver, struct usb_driver, driver);
|
|
const struct usb_device_id *id;
|
|
|
|
id = usb_match_id(usbdev, usbdrv->id_table);
|
|
|
|
return usbdrv->probe(usbdev, id);
|
|
}
|
|
|
|
static void usb_remove(struct device_d *dev)
|
|
{
|
|
struct usb_device *usbdev = container_of(dev, struct usb_device, dev);
|
|
struct usb_driver *usbdrv = container_of(dev->driver, struct usb_driver, driver);
|
|
|
|
usbdrv->disconnect(usbdev);
|
|
}
|
|
|
|
struct bus_type usb_bus_type = {
|
|
.name = "usb",
|
|
.match = usb_match,
|
|
.probe = usb_probe,
|
|
.remove = usb_remove,
|
|
};
|
|
|
|
static int usb_bus_init(void)
|
|
{
|
|
return bus_register(&usb_bus_type);
|
|
}
|
|
pure_initcall(usb_bus_init);
|