Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Cc: Remy Bohmer <linux@bohmer.net> Acked-by: Mike Frysinger <vapier@gentoo.org>master
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/*
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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 <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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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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wait_ms(hub->desc.bPwrOn2PwrGood * 2); |
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} |
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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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struct usb_port_status portsts; |
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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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wait_ms(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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wait_ms(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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struct usb_port_status portsts; |
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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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wait_ms(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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wait_ms(200); |
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/* Allocate a new device struct for it */ |
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usb = usb_alloc_new_device(); |
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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_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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unsigned char buffer[USB_BUFSIZ], *bitmap; |
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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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hub->desc.wHubCharacteristics = |
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le16_to_cpu(descriptor->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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switch (hub->desc.wHubCharacteristics & 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 (hub->desc.wHubCharacteristics & 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 (hub->desc.wHubCharacteristics & 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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struct usb_port_status portsts; |
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unsigned short portstatus, portchange; |
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if (usb_get_port_status(dev, i + 1, &portsts) < 0) { |
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USB_HUB_PRINTF("get_port_status failed\n"); |
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continue; |
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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("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); |
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usb_clear_port_feature(dev, i + 1, |
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USB_PORT_FEAT_C_RESET); |
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} |
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} /* end for i all ports */ |
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return 0; |
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} |
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int usb_hub_probe(struct usb_device *dev, int ifnum) |
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{ |
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struct usb_interface *iface; |
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struct usb_endpoint_descriptor *ep; |
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int ret; |
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iface = &dev->config.if_desc[ifnum]; |
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/* Is it a hub? */ |
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if (iface->desc.bInterfaceClass != USB_CLASS_HUB) |
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return 0; |
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/* Some hubs have a subclass of 1, which AFAICT according to the */ |
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/* specs is not defined, but it works */ |
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if ((iface->desc.bInterfaceSubClass != 0) && |
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(iface->desc.bInterfaceSubClass != 1)) |
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return 0; |
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/* Multiple endpoints? What kind of mutant ninja-hub is this? */ |
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if (iface->desc.bNumEndpoints != 1) |
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return 0; |
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ep = &iface->ep_desc[0]; |
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/* Output endpoint? Curiousier and curiousier.. */ |
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if (!(ep->bEndpointAddress & USB_DIR_IN)) |
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return 0; |
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/* If it's not an interrupt endpoint, we'd better punt! */ |
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if ((ep->bmAttributes & 3) != 3) |
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return 0; |
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/* We found a hub */ |
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USB_HUB_PRINTF("USB hub found\n"); |
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ret = usb_hub_configure(dev); |
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return ret; |
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} |
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