mirror of
https://github.com/brain-hackers/u-boot-brain
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![Milind Choudhary](/assets/img/avatar_default.png)
If probe of a newly connected device fails for some reason, clean up the allocated entry in usb_dev array. Signed-off-by: Milind Choudhary <milindc@codeaurora.org> Signed-off-by: Simon Glass <sjg@chromium.org>
510 lines
15 KiB
C
510 lines
15 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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* HUB "Driver"
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* Probes device for being a hub and configurate it
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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 <asm/unaligned.h>
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#include <linux/ctype.h>
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#include <asm/byteorder.h>
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#include <asm/unaligned.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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#ifdef DEBUG
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#define USB_DEBUG 1
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#define USB_HUB_DEBUG 1
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#else
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#define USB_DEBUG 0
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#define USB_HUB_DEBUG 0
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#endif
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#define USB_PRINTF(fmt, args...) debug_cond(USB_DEBUG, fmt, ##args)
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#define USB_HUB_PRINTF(fmt, args...) debug_cond(USB_HUB_DEBUG, fmt, ##args)
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#define USB_BUFSIZ 512
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static struct usb_hub_device hub_dev[USB_MAX_HUB];
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static int usb_hub_index;
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static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
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{
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return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
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USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
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}
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static int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
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{
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
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port, NULL, 0, USB_CNTL_TIMEOUT);
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}
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static int usb_set_port_feature(struct usb_device *dev, int port, int feature)
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{
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
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port, NULL, 0, USB_CNTL_TIMEOUT);
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}
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static int usb_get_hub_status(struct usb_device *dev, void *data)
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{
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return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
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data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
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}
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static int usb_get_port_status(struct usb_device *dev, int port, void *data)
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{
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return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
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data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
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}
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static void usb_hub_power_on(struct usb_hub_device *hub)
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{
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int i;
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struct usb_device *dev;
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unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2;
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dev = hub->pusb_dev;
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/* Enable power to the ports */
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USB_HUB_PRINTF("enabling power on all ports\n");
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for (i = 0; i < dev->maxchild; i++) {
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usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
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USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
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}
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/* Wait at least 100 msec for power to become stable */
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mdelay(max(pgood_delay, (unsigned)100));
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}
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void usb_hub_reset(void)
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{
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usb_hub_index = 0;
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}
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static struct usb_hub_device *usb_hub_allocate(void)
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{
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if (usb_hub_index < USB_MAX_HUB)
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return &hub_dev[usb_hub_index++];
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printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
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return NULL;
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}
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#define MAX_TRIES 5
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static inline char *portspeed(int portstatus)
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{
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if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
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return "480 Mb/s";
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else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
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return "1.5 Mb/s";
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else
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return "12 Mb/s";
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}
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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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int tries;
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ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
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unsigned short portstatus, portchange;
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USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
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for (tries = 0; tries < MAX_TRIES; tries++) {
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usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
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mdelay(200);
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if (usb_get_port_status(dev, port + 1, portsts) < 0) {
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USB_HUB_PRINTF("get_port_status failed status %lX\n",
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dev->status);
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return -1;
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}
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portstatus = le16_to_cpu(portsts->wPortStatus);
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portchange = le16_to_cpu(portsts->wPortChange);
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USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
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portstatus, portchange,
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portspeed(portstatus));
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USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
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" USB_PORT_STAT_ENABLE %d\n",
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(portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
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(portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
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(portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
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if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
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!(portstatus & USB_PORT_STAT_CONNECTION))
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return -1;
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if (portstatus & USB_PORT_STAT_ENABLE)
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break;
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mdelay(200);
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}
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if (tries == MAX_TRIES) {
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USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \
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"disabling port.\n", port + 1, MAX_TRIES);
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USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
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return -1;
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}
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usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
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*portstat = portstatus;
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return 0;
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}
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void usb_hub_port_connect_change(struct usb_device *dev, int port)
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{
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struct usb_device *usb;
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ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
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unsigned short portstatus;
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/* Check status */
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if (usb_get_port_status(dev, port + 1, portsts) < 0) {
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USB_HUB_PRINTF("get_port_status failed\n");
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return;
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}
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portstatus = le16_to_cpu(portsts->wPortStatus);
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USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
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portstatus,
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le16_to_cpu(portsts->wPortChange),
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portspeed(portstatus));
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/* Clear the connection change status */
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usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
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/* Disconnect any existing devices under this port */
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if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
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(!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
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USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
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/* Return now if nothing is connected */
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if (!(portstatus & USB_PORT_STAT_CONNECTION))
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return;
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}
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mdelay(200);
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/* Reset the port */
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if (hub_port_reset(dev, port, &portstatus) < 0) {
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printf("cannot reset port %i!?\n", port + 1);
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return;
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}
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mdelay(200);
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/* Allocate a new device struct for it */
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usb = usb_alloc_new_device(dev->controller);
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if (portstatus & USB_PORT_STAT_HIGH_SPEED)
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usb->speed = USB_SPEED_HIGH;
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else if (portstatus & USB_PORT_STAT_LOW_SPEED)
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usb->speed = USB_SPEED_LOW;
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else
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usb->speed = USB_SPEED_FULL;
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dev->children[port] = usb;
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usb->parent = dev;
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usb->portnr = port + 1;
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/* Run it through the hoops (find a driver, etc) */
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if (usb_new_device(usb)) {
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/* Woops, disable the port */
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usb_free_device();
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dev->children[port] = NULL;
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USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
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usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
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}
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}
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static int usb_hub_configure(struct usb_device *dev)
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{
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int i;
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ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
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unsigned char *bitmap;
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short hubCharacteristics;
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struct usb_hub_descriptor *descriptor;
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struct usb_hub_device *hub;
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#ifdef USB_HUB_DEBUG
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struct usb_hub_status *hubsts;
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#endif
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/* "allocate" Hub device */
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hub = usb_hub_allocate();
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if (hub == NULL)
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return -1;
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hub->pusb_dev = dev;
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/* Get the the hub descriptor */
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if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
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USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
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"descriptor, giving up %lX\n", dev->status);
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return -1;
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}
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descriptor = (struct usb_hub_descriptor *)buffer;
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/* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
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i = descriptor->bLength;
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if (i > USB_BUFSIZ) {
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USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
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"descriptor - too long: %d\n",
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descriptor->bLength);
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return -1;
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}
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if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
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USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
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"descriptor 2nd giving up %lX\n", dev->status);
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return -1;
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}
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memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
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/* adjust 16bit values */
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put_unaligned(le16_to_cpu(get_unaligned(
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&descriptor->wHubCharacteristics)),
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&hub->desc.wHubCharacteristics);
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/* set the bitmap */
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bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
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/* devices not removable by default */
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memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
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bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
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memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
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for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
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hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
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for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
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hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
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dev->maxchild = descriptor->bNbrPorts;
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USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
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hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
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switch (hubCharacteristics & HUB_CHAR_LPSM) {
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case 0x00:
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USB_HUB_PRINTF("ganged power switching\n");
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break;
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case 0x01:
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USB_HUB_PRINTF("individual port power switching\n");
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break;
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case 0x02:
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case 0x03:
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USB_HUB_PRINTF("unknown reserved power switching mode\n");
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break;
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}
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if (hubCharacteristics & HUB_CHAR_COMPOUND)
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USB_HUB_PRINTF("part of a compound device\n");
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else
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USB_HUB_PRINTF("standalone hub\n");
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switch (hubCharacteristics & HUB_CHAR_OCPM) {
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case 0x00:
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USB_HUB_PRINTF("global over-current protection\n");
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break;
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case 0x08:
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USB_HUB_PRINTF("individual port over-current protection\n");
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break;
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case 0x10:
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case 0x18:
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USB_HUB_PRINTF("no over-current protection\n");
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break;
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}
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USB_HUB_PRINTF("power on to power good time: %dms\n",
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descriptor->bPwrOn2PwrGood * 2);
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USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
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descriptor->bHubContrCurrent);
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for (i = 0; i < dev->maxchild; i++)
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USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
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hub->desc.DeviceRemovable[(i + 1) / 8] & \
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(1 << ((i + 1) % 8)) ? " not" : "");
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if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
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USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
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"too long: %d\n", descriptor->bLength);
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return -1;
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}
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if (usb_get_hub_status(dev, buffer) < 0) {
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USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
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dev->status);
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return -1;
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}
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#ifdef USB_HUB_DEBUG
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hubsts = (struct usb_hub_status *)buffer;
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#endif
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USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
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le16_to_cpu(hubsts->wHubStatus),
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le16_to_cpu(hubsts->wHubChange));
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USB_HUB_PRINTF("local power source is %s\n",
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(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
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"lost (inactive)" : "good");
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USB_HUB_PRINTF("%sover-current condition exists\n",
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(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
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"" : "no ");
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usb_hub_power_on(hub);
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for (i = 0; i < dev->maxchild; i++) {
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ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
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unsigned short portstatus, portchange;
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int ret;
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ulong start = get_timer(0);
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/*
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* Wait for (whichever finishes first)
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* - A maximum of 10 seconds
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* This is a purely observational value driven by connecting
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* a few broken pen drives and taking the max * 1.5 approach
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* - connection_change and connection state to report same
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* state
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*/
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do {
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ret = usb_get_port_status(dev, i + 1, portsts);
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if (ret < 0) {
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USB_HUB_PRINTF("get_port_status failed\n");
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break;
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}
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portstatus = le16_to_cpu(portsts->wPortStatus);
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portchange = le16_to_cpu(portsts->wPortChange);
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if ((portchange & USB_PORT_STAT_C_CONNECTION) ==
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(portstatus & USB_PORT_STAT_CONNECTION))
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break;
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mdelay(100);
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} while (get_timer(start) < CONFIG_SYS_HZ * 10);
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if (ret < 0)
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continue;
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USB_HUB_PRINTF("Port %d Status %X Change %X\n",
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i + 1, portstatus, portchange);
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if (portchange & USB_PORT_STAT_C_CONNECTION) {
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USB_HUB_PRINTF("port %d connection change\n", i + 1);
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usb_hub_port_connect_change(dev, i);
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}
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if (portchange & USB_PORT_STAT_C_ENABLE) {
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USB_HUB_PRINTF("port %d enable change, status %x\n",
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i + 1, portstatus);
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usb_clear_port_feature(dev, i + 1,
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USB_PORT_FEAT_C_ENABLE);
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/* EM interference sometimes causes bad shielded USB
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* devices to be shutdown by the hub, this hack enables
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* them again. Works at least with mouse driver */
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if (!(portstatus & USB_PORT_STAT_ENABLE) &&
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(portstatus & USB_PORT_STAT_CONNECTION) &&
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((dev->children[i]))) {
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USB_HUB_PRINTF("already running port %i " \
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"disabled by hub (EMI?), " \
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"re-enabling...\n", i + 1);
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usb_hub_port_connect_change(dev, i);
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}
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}
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if (portstatus & USB_PORT_STAT_SUSPEND) {
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USB_HUB_PRINTF("port %d suspend change\n", i + 1);
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usb_clear_port_feature(dev, i + 1,
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USB_PORT_FEAT_SUSPEND);
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}
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if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
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USB_HUB_PRINTF("port %d over-current change\n", i + 1);
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usb_clear_port_feature(dev, i + 1,
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USB_PORT_FEAT_C_OVER_CURRENT);
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usb_hub_power_on(hub);
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}
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if (portchange & USB_PORT_STAT_C_RESET) {
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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 *iface;
|
|
struct usb_endpoint_descriptor *ep;
|
|
int ret;
|
|
|
|
iface = &dev->config.if_desc[ifnum];
|
|
/* Is it a hub? */
|
|
if (iface->desc.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->desc.bInterfaceSubClass != 0) &&
|
|
(iface->desc.bInterfaceSubClass != 1))
|
|
return 0;
|
|
/* Multiple endpoints? What kind of mutant ninja-hub is this? */
|
|
if (iface->desc.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;
|
|
}
|