mirror of
https://github.com/AsahiLinux/u-boot
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de39f8c19d
USB Code style patch Signed-off-by: Michael Trimarchi <trimarchi@gandalf.sssup.it> Signed-off-by: Remy Böhmer <linux@bohmer.net>
1362 lines
38 KiB
C
1362 lines
38 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 U-Boot:
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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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 <asm/processor.h>
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#include <linux/ctype.h>
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#include <asm/byteorder.h>
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#include <usb.h>
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#ifdef CONFIG_4xx
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#include <asm/4xx_pci.h>
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#endif
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#undef 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 struct usb_device usb_dev[USB_MAX_DEVICE];
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static int dev_index;
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static int running;
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static int asynch_allowed;
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static struct devrequest setup_packet;
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char usb_started; /* flag for the started/stopped USB status */
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/**********************************************************************
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* some forward declerations...
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*/
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void usb_scan_devices(void);
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int usb_hub_probe(struct usb_device *dev, int ifnum);
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void usb_hub_reset(void);
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static int hub_port_reset(struct usb_device *dev, int port,
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unsigned short *portstat);
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/***********************************************************************
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* wait_ms
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*/
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inline void wait_ms(unsigned long ms)
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{
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while (ms-- > 0)
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udelay(1000);
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}
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/***************************************************************************
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* Init USB Device
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*/
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int usb_init(void)
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{
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int result;
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running = 0;
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dev_index = 0;
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asynch_allowed = 1;
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usb_hub_reset();
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/* init low_level USB */
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printf("USB: ");
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result = usb_lowlevel_init();
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/* if lowlevel init is OK, scan the bus for devices
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* i.e. search HUBs and configure them */
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if (result == 0) {
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printf("scanning bus for devices... ");
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running = 1;
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usb_scan_devices();
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usb_started = 1;
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return 0;
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} else {
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printf("Error, couldn't init Lowlevel part\n");
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usb_started = 0;
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return -1;
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}
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}
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/******************************************************************************
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* Stop USB this stops the LowLevel Part and deregisters USB devices.
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*/
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int usb_stop(void)
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{
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int res = 0;
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if (usb_started) {
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asynch_allowed = 1;
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usb_started = 0;
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usb_hub_reset();
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res = usb_lowlevel_stop();
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}
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return res;
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}
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/*
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* disables the asynch behaviour of the control message. This is used for data
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* transfers that uses the exclusiv access to the control and bulk messages.
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*/
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void usb_disable_asynch(int disable)
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{
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asynch_allowed = !disable;
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}
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/*-------------------------------------------------------------------
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* Message wrappers.
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*
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*/
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/*
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* submits an Interrupt Message
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*/
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int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
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void *buffer, int transfer_len, int interval)
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{
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return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
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}
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/*
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* submits a control message and waits for comletion (at least timeout * 1ms)
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* If timeout is 0, we don't wait for completion (used as example to set and
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* clear keyboards LEDs). For data transfers, (storage transfers) we don't
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* allow control messages with 0 timeout, by previousely resetting the flag
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* asynch_allowed (usb_disable_asynch(1)).
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* returns the transfered length if OK or -1 if error. The transfered length
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* and the current status are stored in the dev->act_len and dev->status.
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*/
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int usb_control_msg(struct usb_device *dev, unsigned int pipe,
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unsigned char request, unsigned char requesttype,
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unsigned short value, unsigned short index,
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void *data, unsigned short size, int timeout)
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{
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if ((timeout == 0) && (!asynch_allowed)) {
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/* request for a asynch control pipe is not allowed */
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return -1;
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}
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/* set setup command */
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setup_packet.requesttype = requesttype;
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setup_packet.request = request;
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setup_packet.value = cpu_to_le16(value);
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setup_packet.index = cpu_to_le16(index);
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setup_packet.length = cpu_to_le16(size);
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USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
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"value 0x%X index 0x%X length 0x%X\n",
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request, requesttype, value, index, size);
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dev->status = USB_ST_NOT_PROC; /*not yet processed */
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submit_control_msg(dev, pipe, data, size, &setup_packet);
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if (timeout == 0)
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return (int)size;
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if (dev->status != 0) {
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/*
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* Let's wait a while for the timeout to elapse.
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* It has no real use, but it keeps the interface happy.
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*/
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wait_ms(timeout);
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return -1;
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}
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return dev->act_len;
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}
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/*-------------------------------------------------------------------
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* submits bulk message, and waits for completion. returns 0 if Ok or
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* -1 if Error.
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* synchronous behavior
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*/
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int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
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void *data, int len, int *actual_length, int timeout)
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{
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if (len < 0)
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return -1;
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dev->status = USB_ST_NOT_PROC; /*not yet processed */
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submit_bulk_msg(dev, pipe, data, len);
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while (timeout--) {
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if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
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break;
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wait_ms(1);
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}
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*actual_length = dev->act_len;
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if (dev->status == 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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/*-------------------------------------------------------------------
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* Max Packet stuff
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*/
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/*
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* returns the max packet size, depending on the pipe direction and
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* the configurations values
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*/
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int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
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{
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/* direction is out -> use emaxpacket out */
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if ((pipe & USB_DIR_IN) == 0)
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return dev->epmaxpacketout[((pipe>>15) & 0xf)];
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else
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return dev->epmaxpacketin[((pipe>>15) & 0xf)];
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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 __attribute__((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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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.bNumInterfaces; i++)
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for (ii = 0; ii < dev->config.if_desc[i].bNumEndpoints; ii++)
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usb_set_maxpacket_ep(dev,
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&dev->config.if_desc[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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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.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.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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dev->config.no_of_if++;
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memcpy(&dev->config.if_desc[ifno],
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&buffer[index], buffer[index]);
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dev->config.if_desc[ifno].no_of_ep = 0;
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dev->config.if_desc[ifno].num_altsetting = 1;
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curr_if_num =
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dev->config.if_desc[ifno].bInterfaceNumber;
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} else {
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/* found alternate setting for the interface */
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dev->config.if_desc[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.if_desc[ifno].no_of_ep;
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/* found an endpoint */
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dev->config.if_desc[ifno].no_of_ep++;
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memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
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&buffer[index], buffer[index]);
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le16_to_cpus(&(dev->config.if_desc[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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* Clears an endpoint
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* endp: endpoint number in bits 0-3;
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* direction flag in bit 7 (1 = IN, 0 = OUT)
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*/
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int usb_clear_halt(struct usb_device *dev, int pipe)
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{
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int result;
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int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
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result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
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endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
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/* don't clear if failed */
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if (result < 0)
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return result;
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/*
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* NOTE: we do not get status and verify reset was successful
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* as some devices are reported to lock up upon this check..
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*/
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usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
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/* toggle is reset on clear */
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usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
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return 0;
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}
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/**********************************************************************
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* get_descriptor type
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*/
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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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* gets configuration cfgno and store it in the buffer
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*/
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int usb_get_configuration_no(struct usb_device *dev,
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unsigned char *buffer, int cfgno)
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{
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int result;
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unsigned int tmp;
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struct usb_config_descriptor *config;
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|
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config = (struct usb_config_descriptor *)&buffer[0];
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result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
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if (result < 9) {
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if (result < 0)
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printf("unable to get descriptor, error %lX\n",
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dev->status);
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else
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printf("config descriptor too short " \
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"(expected %i, got %i)\n", 9, result);
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return -1;
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}
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tmp = le16_to_cpu(config->wTotalLength);
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if (tmp > USB_BUFSIZ) {
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USB_PRINTF("usb_get_configuration_no: failed to get " \
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"descriptor - too long: %d\n", tmp);
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return -1;
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}
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result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
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USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
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cfgno, result, tmp);
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return result;
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}
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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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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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|
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/********************************************************************
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|
* set interface number to interface
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|
*/
|
|
int usb_set_interface(struct usb_device *dev, int interface, int alternate)
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|
{
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struct usb_interface_descriptor *if_face = NULL;
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int ret, i;
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for (i = 0; i < dev->config.bNumInterfaces; i++) {
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if (dev->config.if_desc[i].bInterfaceNumber == interface) {
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if_face = &dev->config.if_desc[i];
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break;
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}
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}
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if (!if_face) {
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printf("selecting invalid interface %d", interface);
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return -1;
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}
|
|
/*
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|
* We should return now for devices with only one alternate setting.
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|
* 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 U-Boot.
|
|
*/
|
|
if (if_face->num_altsetting == 1)
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return 0;
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|
|
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
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alternate, interface, NULL, 0,
|
|
USB_CNTL_TIMEOUT * 5);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/********************************************************************
|
|
* set configuration number to configuration
|
|
*/
|
|
int usb_set_configuration(struct usb_device *dev, int configuration)
|
|
{
|
|
int res;
|
|
USB_PRINTF("set configuration %d\n", configuration);
|
|
/* set setup command */
|
|
res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
USB_REQ_SET_CONFIGURATION, 0,
|
|
configuration, 0,
|
|
NULL, 0, USB_CNTL_TIMEOUT);
|
|
if (res == 0) {
|
|
dev->toggle[0] = 0;
|
|
dev->toggle[1] = 0;
|
|
return 0;
|
|
} else
|
|
return -1;
|
|
}
|
|
|
|
/********************************************************************
|
|
* 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
|
|
*/
|
|
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=%x)\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;
|
|
}
|
|
|
|
|
|
/********************************************************************
|
|
* USB device handling:
|
|
* the USB device are static allocated [USB_MAX_DEVICE].
|
|
*/
|
|
|
|
|
|
/* returns a pointer to the device with the index [index].
|
|
* if the device is not assigned (dev->devnum==-1) returns NULL
|
|
*/
|
|
struct usb_device *usb_get_dev_index(int index)
|
|
{
|
|
if (usb_dev[index].devnum == -1)
|
|
return NULL;
|
|
else
|
|
return &usb_dev[index];
|
|
}
|
|
|
|
|
|
/* returns a pointer of a new device structure or NULL, if
|
|
* no device struct is available
|
|
*/
|
|
struct usb_device *usb_alloc_new_device(void)
|
|
{
|
|
int i;
|
|
USB_PRINTF("New Device %d\n", dev_index);
|
|
if (dev_index == USB_MAX_DEVICE) {
|
|
printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
|
|
return NULL;
|
|
}
|
|
/* default Address is 0, real addresses start with 1 */
|
|
usb_dev[dev_index].devnum = dev_index + 1;
|
|
usb_dev[dev_index].maxchild = 0;
|
|
for (i = 0; i < USB_MAXCHILDREN; i++)
|
|
usb_dev[dev_index].children[i] = NULL;
|
|
usb_dev[dev_index].parent = NULL;
|
|
dev_index++;
|
|
return &usb_dev[dev_index - 1];
|
|
}
|
|
|
|
|
|
/*
|
|
* By the time we get here, the device has gotten a new device ID
|
|
* and is in the default state. We need to identify the thing and
|
|
* get the ball rolling..
|
|
*
|
|
* Returns 0 for success, != 0 for error.
|
|
*/
|
|
int usb_new_device(struct usb_device *dev)
|
|
{
|
|
int addr, err;
|
|
int tmp;
|
|
unsigned char tmpbuf[USB_BUFSIZ];
|
|
|
|
/* We still haven't set the Address yet */
|
|
addr = dev->devnum;
|
|
dev->devnum = 0;
|
|
|
|
#ifdef CONFIG_LEGACY_USB_INIT_SEQ
|
|
/* this is the old and known way of initializing devices, it is
|
|
* different than what Windows and Linux are doing. Windows and Linux
|
|
* both retrieve 64 bytes while reading the device descriptor
|
|
* Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
|
|
* invalid header while reading 8 bytes as device descriptor. */
|
|
dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
|
|
dev->maxpacketsize = PACKET_SIZE_8;
|
|
dev->epmaxpacketin[0] = 8;
|
|
dev->epmaxpacketout[0] = 8;
|
|
|
|
err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
|
|
if (err < 8) {
|
|
printf("\n USB device not responding, " \
|
|
"giving up (status=%lX)\n", dev->status);
|
|
return 1;
|
|
}
|
|
#else
|
|
/* This is a Windows scheme of initialization sequence, with double
|
|
* reset of the device (Linux uses the same sequence)
|
|
* Some equipment is said to work only with such init sequence; this
|
|
* patch is based on the work by Alan Stern:
|
|
* http://sourceforge.net/mailarchive/forum.php?
|
|
* thread_id=5729457&forum_id=5398
|
|
*/
|
|
struct usb_device_descriptor *desc;
|
|
int port = -1;
|
|
struct usb_device *parent = dev->parent;
|
|
unsigned short portstatus;
|
|
|
|
/* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
|
|
* only 18 bytes long, this will terminate with a short packet. But if
|
|
* the maxpacket size is 8 or 16 the device may be waiting to transmit
|
|
* some more, or keeps on retransmitting the 8 byte header. */
|
|
|
|
desc = (struct usb_device_descriptor *)tmpbuf;
|
|
dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
|
|
/* Default to 64 byte max packet size */
|
|
dev->maxpacketsize = PACKET_SIZE_64;
|
|
dev->epmaxpacketin[0] = 64;
|
|
dev->epmaxpacketout[0] = 64;
|
|
|
|
err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
|
|
if (err < 0) {
|
|
USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
|
|
return 1;
|
|
}
|
|
|
|
dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
|
|
|
|
/* find the port number we're at */
|
|
if (parent) {
|
|
int j;
|
|
|
|
for (j = 0; j < parent->maxchild; j++) {
|
|
if (parent->children[j] == dev) {
|
|
port = j;
|
|
break;
|
|
}
|
|
}
|
|
if (port < 0) {
|
|
printf("usb_new_device:cannot locate device's port.\n");
|
|
return 1;
|
|
}
|
|
|
|
/* reset the port for the second time */
|
|
err = hub_port_reset(dev->parent, port, &portstatus);
|
|
if (err < 0) {
|
|
printf("\n Couldn't reset port %i\n", port);
|
|
return 1;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
|
|
dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
|
|
switch (dev->descriptor.bMaxPacketSize0) {
|
|
case 8:
|
|
dev->maxpacketsize = PACKET_SIZE_8;
|
|
break;
|
|
case 16:
|
|
dev->maxpacketsize = PACKET_SIZE_16;
|
|
break;
|
|
case 32:
|
|
dev->maxpacketsize = PACKET_SIZE_32;
|
|
break;
|
|
case 64:
|
|
dev->maxpacketsize = PACKET_SIZE_64;
|
|
break;
|
|
}
|
|
dev->devnum = addr;
|
|
|
|
err = usb_set_address(dev); /* set address */
|
|
|
|
if (err < 0) {
|
|
printf("\n USB device not accepting new address " \
|
|
"(error=%lX)\n", dev->status);
|
|
return 1;
|
|
}
|
|
|
|
wait_ms(10); /* Let the SET_ADDRESS settle */
|
|
|
|
tmp = sizeof(dev->descriptor);
|
|
|
|
err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
|
|
&dev->descriptor, sizeof(dev->descriptor));
|
|
if (err < tmp) {
|
|
if (err < 0)
|
|
printf("unable to get device descriptor (error=%d)\n",
|
|
err);
|
|
else
|
|
printf("USB device descriptor short read " \
|
|
"(expected %i, got %i)\n", tmp, err);
|
|
return 1;
|
|
}
|
|
/* correct le values */
|
|
le16_to_cpus(&dev->descriptor.bcdUSB);
|
|
le16_to_cpus(&dev->descriptor.idVendor);
|
|
le16_to_cpus(&dev->descriptor.idProduct);
|
|
le16_to_cpus(&dev->descriptor.bcdDevice);
|
|
/* only support for one config for now */
|
|
usb_get_configuration_no(dev, &tmpbuf[0], 0);
|
|
usb_parse_config(dev, &tmpbuf[0], 0);
|
|
usb_set_maxpacket(dev);
|
|
/* we set the default configuration here */
|
|
if (usb_set_configuration(dev, dev->config.bConfigurationValue)) {
|
|
printf("failed to set default configuration " \
|
|
"len %d, status %lX\n", dev->act_len, dev->status);
|
|
return -1;
|
|
}
|
|
USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
|
|
dev->descriptor.iManufacturer, dev->descriptor.iProduct,
|
|
dev->descriptor.iSerialNumber);
|
|
memset(dev->mf, 0, sizeof(dev->mf));
|
|
memset(dev->prod, 0, sizeof(dev->prod));
|
|
memset(dev->serial, 0, sizeof(dev->serial));
|
|
if (dev->descriptor.iManufacturer)
|
|
usb_string(dev, dev->descriptor.iManufacturer,
|
|
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,
|
|
dev->serial, sizeof(dev->serial));
|
|
USB_PRINTF("Manufacturer %s\n", dev->mf);
|
|
USB_PRINTF("Product %s\n", dev->prod);
|
|
USB_PRINTF("SerialNumber %s\n", dev->serial);
|
|
/* now prode if the device is a hub */
|
|
usb_hub_probe(dev, 0);
|
|
return 0;
|
|
}
|
|
|
|
/* build device Tree */
|
|
void usb_scan_devices(void)
|
|
{
|
|
int i;
|
|
struct usb_device *dev;
|
|
|
|
/* first make all devices unknown */
|
|
for (i = 0; i < USB_MAX_DEVICE; i++) {
|
|
memset(&usb_dev[i], 0, sizeof(struct usb_device));
|
|
usb_dev[i].devnum = -1;
|
|
}
|
|
dev_index = 0;
|
|
/* device 0 is always present (root hub, so let it analyze) */
|
|
dev = usb_alloc_new_device();
|
|
usb_new_device(dev);
|
|
printf("%d USB Device(s) found\n", dev_index);
|
|
/* insert "driver" if possible */
|
|
#ifdef CONFIG_USB_KEYBOARD
|
|
drv_usb_kbd_init();
|
|
USB_PRINTF("scan end\n");
|
|
#endif
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
* HUB "Driver"
|
|
* Probes device for being a hub and configurate it
|
|
*/
|
|
|
|
#undef USB_HUB_DEBUG
|
|
|
|
#ifdef USB_HUB_DEBUG
|
|
#define USB_HUB_PRINTF(fmt, args...) printf(fmt , ##args)
|
|
#else
|
|
#define USB_HUB_PRINTF(fmt, args...)
|
|
#endif
|
|
|
|
|
|
static struct usb_hub_device hub_dev[USB_MAX_HUB];
|
|
static int usb_hub_index;
|
|
|
|
|
|
int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
|
|
{
|
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
|
|
USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
int usb_clear_hub_feature(struct usb_device *dev, int feature)
|
|
{
|
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature,
|
|
0, NULL, 0, USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
|
|
{
|
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
|
|
port, NULL, 0, USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
int usb_set_port_feature(struct usb_device *dev, int port, int feature)
|
|
{
|
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
|
|
port, NULL, 0, USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
int usb_get_hub_status(struct usb_device *dev, void *data)
|
|
{
|
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
|
|
data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
int usb_get_port_status(struct usb_device *dev, int port, void *data)
|
|
{
|
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
|
|
data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
|
|
static void usb_hub_power_on(struct usb_hub_device *hub)
|
|
{
|
|
int i;
|
|
struct usb_device *dev;
|
|
|
|
dev = hub->pusb_dev;
|
|
/* Enable power to the ports */
|
|
USB_HUB_PRINTF("enabling power on all ports\n");
|
|
for (i = 0; i < dev->maxchild; i++) {
|
|
usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
|
|
USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
|
|
wait_ms(hub->desc.bPwrOn2PwrGood * 2);
|
|
}
|
|
}
|
|
|
|
void usb_hub_reset(void)
|
|
{
|
|
usb_hub_index = 0;
|
|
}
|
|
|
|
struct usb_hub_device *usb_hub_allocate(void)
|
|
{
|
|
if (usb_hub_index < USB_MAX_HUB)
|
|
return &hub_dev[usb_hub_index++];
|
|
|
|
printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
|
|
return NULL;
|
|
}
|
|
|
|
#define MAX_TRIES 5
|
|
|
|
static int hub_port_reset(struct usb_device *dev, int port,
|
|
unsigned short *portstat)
|
|
{
|
|
int tries;
|
|
struct usb_port_status portsts;
|
|
unsigned short portstatus, portchange;
|
|
|
|
USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
|
|
for (tries = 0; tries < MAX_TRIES; tries++) {
|
|
|
|
usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
|
|
wait_ms(200);
|
|
|
|
if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
|
|
USB_HUB_PRINTF("get_port_status failed status %lX\n",
|
|
dev->status);
|
|
return -1;
|
|
}
|
|
portstatus = le16_to_cpu(portsts.wPortStatus);
|
|
portchange = le16_to_cpu(portsts.wPortChange);
|
|
USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
|
|
portstatus, portchange,
|
|
portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? \
|
|
"Low Speed" : "High Speed");
|
|
USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
|
|
" USB_PORT_STAT_ENABLE %d\n",
|
|
(portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
|
|
(portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
|
|
(portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
|
|
|
|
if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
|
|
!(portstatus & USB_PORT_STAT_CONNECTION))
|
|
return -1;
|
|
|
|
if (portstatus & USB_PORT_STAT_ENABLE)
|
|
break;
|
|
|
|
wait_ms(200);
|
|
}
|
|
|
|
if (tries == MAX_TRIES) {
|
|
USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \
|
|
"disabling port.\n", port + 1, MAX_TRIES);
|
|
USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
|
|
return -1;
|
|
}
|
|
|
|
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
|
|
*portstat = portstatus;
|
|
return 0;
|
|
}
|
|
|
|
|
|
void usb_hub_port_connect_change(struct usb_device *dev, int port)
|
|
{
|
|
struct usb_device *usb;
|
|
struct usb_port_status portsts;
|
|
unsigned short portstatus, portchange;
|
|
|
|
/* Check status */
|
|
if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
|
|
USB_HUB_PRINTF("get_port_status failed\n");
|
|
return;
|
|
}
|
|
|
|
portstatus = le16_to_cpu(portsts.wPortStatus);
|
|
portchange = le16_to_cpu(portsts.wPortChange);
|
|
USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
|
|
portstatus, portchange,
|
|
portstatus&(1 << USB_PORT_FEAT_LOWSPEED) ? \
|
|
"Low Speed" : "High Speed");
|
|
|
|
/* Clear the connection change status */
|
|
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
|
|
|
|
/* Disconnect any existing devices under this port */
|
|
if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
|
|
(!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
|
|
USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
|
|
/* Return now if nothing is connected */
|
|
if (!(portstatus & USB_PORT_STAT_CONNECTION))
|
|
return;
|
|
}
|
|
wait_ms(200);
|
|
|
|
/* Reset the port */
|
|
if (hub_port_reset(dev, port, &portstatus) < 0) {
|
|
printf("cannot reset port %i!?\n", port + 1);
|
|
return;
|
|
}
|
|
|
|
wait_ms(200);
|
|
|
|
/* Allocate a new device struct for it */
|
|
usb = usb_alloc_new_device();
|
|
usb->slow = (portstatus & USB_PORT_STAT_LOW_SPEED) ? 1 : 0;
|
|
|
|
dev->children[port] = usb;
|
|
usb->parent = dev;
|
|
/* Run it through the hoops (find a driver, etc) */
|
|
if (usb_new_device(usb)) {
|
|
/* Woops, disable the port */
|
|
USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
|
|
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
|
|
}
|
|
}
|
|
|
|
|
|
int usb_hub_configure(struct usb_device *dev)
|
|
{
|
|
unsigned char buffer[USB_BUFSIZ], *bitmap;
|
|
struct usb_hub_descriptor *descriptor;
|
|
struct usb_hub_status *hubsts;
|
|
int i;
|
|
struct usb_hub_device *hub;
|
|
|
|
/* "allocate" Hub device */
|
|
hub = usb_hub_allocate();
|
|
if (hub == NULL)
|
|
return -1;
|
|
hub->pusb_dev = dev;
|
|
/* Get the the hub descriptor */
|
|
if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
|
|
USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
|
|
"descriptor, giving up %lX\n", dev->status);
|
|
return -1;
|
|
}
|
|
descriptor = (struct usb_hub_descriptor *)buffer;
|
|
|
|
/* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
|
|
i = descriptor->bLength;
|
|
if (i > USB_BUFSIZ) {
|
|
USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
|
|
"descriptor - too long: %d\n",
|
|
descriptor->bLength);
|
|
return -1;
|
|
}
|
|
|
|
if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
|
|
USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
|
|
"descriptor 2nd giving up %lX\n", dev->status);
|
|
return -1;
|
|
}
|
|
memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
|
|
/* adjust 16bit values */
|
|
hub->desc.wHubCharacteristics =
|
|
le16_to_cpu(descriptor->wHubCharacteristics);
|
|
/* set the bitmap */
|
|
bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
|
|
/* devices not removable by default */
|
|
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
|
|
bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
|
|
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
|
|
|
|
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
|
|
hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
|
|
|
|
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
|
|
hub->desc.DeviceRemovable[i] = descriptor->PortPowerCtrlMask[i];
|
|
|
|
dev->maxchild = descriptor->bNbrPorts;
|
|
USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
|
|
|
|
switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
|
|
case 0x00:
|
|
USB_HUB_PRINTF("ganged power switching\n");
|
|
break;
|
|
case 0x01:
|
|
USB_HUB_PRINTF("individual port power switching\n");
|
|
break;
|
|
case 0x02:
|
|
case 0x03:
|
|
USB_HUB_PRINTF("unknown reserved power switching mode\n");
|
|
break;
|
|
}
|
|
|
|
if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
|
|
USB_HUB_PRINTF("part of a compound device\n");
|
|
else
|
|
USB_HUB_PRINTF("standalone hub\n");
|
|
|
|
switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
|
|
case 0x00:
|
|
USB_HUB_PRINTF("global over-current protection\n");
|
|
break;
|
|
case 0x08:
|
|
USB_HUB_PRINTF("individual port over-current protection\n");
|
|
break;
|
|
case 0x10:
|
|
case 0x18:
|
|
USB_HUB_PRINTF("no over-current protection\n");
|
|
break;
|
|
}
|
|
|
|
USB_HUB_PRINTF("power on to power good time: %dms\n",
|
|
descriptor->bPwrOn2PwrGood * 2);
|
|
USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
|
|
descriptor->bHubContrCurrent);
|
|
|
|
for (i = 0; i < dev->maxchild; i++)
|
|
USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
|
|
hub->desc.DeviceRemovable[(i + 1) / 8] & \
|
|
(1 << ((i + 1) % 8)) ? " not" : "");
|
|
|
|
if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
|
|
USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
|
|
"too long: %d\n", descriptor->bLength);
|
|
return -1;
|
|
}
|
|
|
|
if (usb_get_hub_status(dev, buffer) < 0) {
|
|
USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
|
|
dev->status);
|
|
return -1;
|
|
}
|
|
|
|
hubsts = (struct usb_hub_status *)buffer;
|
|
USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
|
|
le16_to_cpu(hubsts->wHubStatus),
|
|
le16_to_cpu(hubsts->wHubChange));
|
|
USB_HUB_PRINTF("local power source is %s\n",
|
|
(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
|
|
"lost (inactive)" : "good");
|
|
USB_HUB_PRINTF("%sover-current condition exists\n",
|
|
(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
|
|
"" : "no ");
|
|
usb_hub_power_on(hub);
|
|
|
|
for (i = 0; i < dev->maxchild; i++) {
|
|
struct usb_port_status portsts;
|
|
unsigned short portstatus, portchange;
|
|
|
|
if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
|
|
USB_HUB_PRINTF("get_port_status failed\n");
|
|
continue;
|
|
}
|
|
|
|
portstatus = le16_to_cpu(portsts.wPortStatus);
|
|
portchange = le16_to_cpu(portsts.wPortChange);
|
|
USB_HUB_PRINTF("Port %d Status %X Change %X\n",
|
|
i + 1, portstatus, portchange);
|
|
|
|
if (portchange & USB_PORT_STAT_C_CONNECTION) {
|
|
USB_HUB_PRINTF("port %d connection change\n", i + 1);
|
|
usb_hub_port_connect_change(dev, i);
|
|
}
|
|
if (portchange & USB_PORT_STAT_C_ENABLE) {
|
|
USB_HUB_PRINTF("port %d enable change, status %x\n",
|
|
i + 1, portstatus);
|
|
usb_clear_port_feature(dev, i + 1,
|
|
USB_PORT_FEAT_C_ENABLE);
|
|
|
|
/* EM interference sometimes causes bad shielded USB
|
|
* devices to be shutdown by the hub, this hack enables
|
|
* them again. Works at least with mouse driver */
|
|
if (!(portstatus & USB_PORT_STAT_ENABLE) &&
|
|
(portstatus & USB_PORT_STAT_CONNECTION) &&
|
|
((dev->children[i]))) {
|
|
USB_HUB_PRINTF("already running port %i " \
|
|
"disabled by hub (EMI?), " \
|
|
"re-enabling...\n", i + 1);
|
|
usb_hub_port_connect_change(dev, i);
|
|
}
|
|
}
|
|
if (portstatus & USB_PORT_STAT_SUSPEND) {
|
|
USB_HUB_PRINTF("port %d suspend change\n", i + 1);
|
|
usb_clear_port_feature(dev, i + 1,
|
|
USB_PORT_FEAT_SUSPEND);
|
|
}
|
|
|
|
if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
|
|
USB_HUB_PRINTF("port %d over-current change\n", i + 1);
|
|
usb_clear_port_feature(dev, i + 1,
|
|
USB_PORT_FEAT_C_OVER_CURRENT);
|
|
usb_hub_power_on(hub);
|
|
}
|
|
|
|
if (portchange & USB_PORT_STAT_C_RESET) {
|
|
USB_HUB_PRINTF("port %d reset change\n", i + 1);
|
|
usb_clear_port_feature(dev, i + 1,
|
|
USB_PORT_FEAT_C_RESET);
|
|
}
|
|
} /* end for i all ports */
|
|
|
|
return 0;
|
|
}
|
|
|
|
int usb_hub_probe(struct usb_device *dev, int ifnum)
|
|
{
|
|
struct usb_interface_descriptor *iface;
|
|
struct usb_endpoint_descriptor *ep;
|
|
int ret;
|
|
|
|
iface = &dev->config.if_desc[ifnum];
|
|
/* Is it a hub? */
|
|
if (iface->bInterfaceClass != USB_CLASS_HUB)
|
|
return 0;
|
|
/* Some hubs have a subclass of 1, which AFAICT according to the */
|
|
/* specs is not defined, but it works */
|
|
if ((iface->bInterfaceSubClass != 0) &&
|
|
(iface->bInterfaceSubClass != 1))
|
|
return 0;
|
|
/* Multiple endpoints? What kind of mutant ninja-hub is this? */
|
|
if (iface->bNumEndpoints != 1)
|
|
return 0;
|
|
ep = &iface->ep_desc[0];
|
|
/* Output endpoint? Curiousier and curiousier.. */
|
|
if (!(ep->bEndpointAddress & USB_DIR_IN))
|
|
return 0;
|
|
/* If it's not an interrupt endpoint, we'd better punt! */
|
|
if ((ep->bmAttributes & 3) != 3)
|
|
return 0;
|
|
/* We found a hub */
|
|
USB_HUB_PRINTF("USB hub found\n");
|
|
ret = usb_hub_configure(dev);
|
|
return ret;
|
|
}
|
|
|
|
/* EOF */
|