upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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562 lines
16 KiB
562 lines
16 KiB
/*
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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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* SPDX-License-Identifier: GPL-2.0+
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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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#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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__weak void usb_hub_reset_devices(int port)
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{
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return;
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}
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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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ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
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unsigned short portstatus;
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int ret;
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dev = hub->pusb_dev;
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/*
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* Enable power to the ports:
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* Here we Power-cycle the ports: aka,
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* turning them off and turning on again.
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*/
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debug("enabling power on all ports\n");
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for (i = 0; i < dev->maxchild; i++) {
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usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
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debug("port %d returns %lX\n", i + 1, dev->status);
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}
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/* Wait at least 2*bPwrOn2PwrGood for PP to change */
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mdelay(pgood_delay);
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for (i = 0; i < dev->maxchild; i++) {
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ret = usb_get_port_status(dev, i + 1, portsts);
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if (ret < 0) {
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debug("port %d: get_port_status failed\n", i + 1);
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continue;
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}
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/*
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* Check to confirm the state of Port Power:
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* xHCI says "After modifying PP, s/w shall read
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* PP and confirm that it has reached the desired state
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* before modifying it again, undefined behavior may occur
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* if this procedure is not followed".
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* EHCI doesn't say anything like this, but no harm in keeping
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* this.
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*/
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portstatus = le16_to_cpu(portsts->wPortStatus);
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if (portstatus & (USB_PORT_STAT_POWER << 1)) {
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debug("port %d: Port power change failed\n", i + 1);
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continue;
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}
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}
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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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debug("port %d returns %lX\n", i + 1, dev->status);
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}
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/*
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* Wait for power to become stable,
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* plus spec-defined max time for device to connect
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*/
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mdelay(pgood_delay + 1000);
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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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char *speed_str;
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switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
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case USB_PORT_STAT_SUPER_SPEED:
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speed_str = "5 Gb/s";
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break;
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case USB_PORT_STAT_HIGH_SPEED:
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speed_str = "480 Mb/s";
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break;
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case USB_PORT_STAT_LOW_SPEED:
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speed_str = "1.5 Mb/s";
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break;
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default:
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speed_str = "12 Mb/s";
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break;
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}
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return speed_str;
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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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debug("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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debug("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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debug("portstatus %x, change %x, %s\n", portstatus, portchange,
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portspeed(portstatus));
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debug("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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/*
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* Perhaps we should check for the following here:
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* - C_CONNECTION hasn't been set.
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* - CONNECTION is still set.
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*
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* Doing so would ensure that the device is still connected
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* to the bus, and hasn't been unplugged or replaced while the
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* USB bus reset was going on.
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*
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* However, if we do that, then (at least) a San Disk Ultra
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* USB 3.0 16GB device fails to reset on (at least) an NVIDIA
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* Tegra Jetson TK1 board. For some reason, the device appears
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* to briefly drop off the bus when this second bus reset is
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* executed, yet if we retry this loop, it'll eventually come
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* back after another reset or two.
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*/
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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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debug("Cannot enable port %i after %i retries, " \
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"disabling port.\n", port + 1, MAX_TRIES);
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debug("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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debug("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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debug("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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debug("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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switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
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case USB_PORT_STAT_SUPER_SPEED:
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usb->speed = USB_SPEED_SUPER;
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break;
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case USB_PORT_STAT_HIGH_SPEED:
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usb->speed = USB_SPEED_HIGH;
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break;
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case USB_PORT_STAT_LOW_SPEED:
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usb->speed = USB_SPEED_LOW;
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break;
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default:
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usb->speed = USB_SPEED_FULL;
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break;
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}
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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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debug("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, length;
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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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__maybe_unused struct usb_hub_status *hubsts;
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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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debug("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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length = min(descriptor->bLength, sizeof(struct usb_hub_descriptor));
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if (usb_get_hub_descriptor(dev, buffer, length) < 0) {
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debug("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, length);
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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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debug("%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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debug("ganged power switching\n");
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break;
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case 0x01:
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debug("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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debug("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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debug("part of a compound device\n");
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else
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debug("standalone hub\n");
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switch (hubCharacteristics & HUB_CHAR_OCPM) {
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case 0x00:
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debug("global over-current protection\n");
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break;
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case 0x08:
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debug("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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debug("no over-current protection\n");
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break;
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}
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debug("power on to power good time: %dms\n",
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descriptor->bPwrOn2PwrGood * 2);
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debug("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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debug("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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debug("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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debug("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 DEBUG
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hubsts = (struct usb_hub_status *)buffer;
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#endif
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debug("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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debug("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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debug("%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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|
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/*
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* Reset any devices that may be in a bad state when applying
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* the power. This is a __weak function. Resetting of the devices
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* should occur in the board file of the device.
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*/
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for (i = 0; i < dev->maxchild; i++)
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usb_hub_reset_devices(i + 1);
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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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debug("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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|
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} while (get_timer(start) < CONFIG_SYS_HZ * 10);
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|
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if (ret < 0)
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continue;
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|
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debug("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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debug("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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debug("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);
|
|
/*
|
|
* The following hack causes a ghost device problem
|
|
* to Faraday EHCI
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|
*/
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#ifndef CONFIG_USB_EHCI_FARADAY
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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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debug("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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#endif
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}
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if (portstatus & USB_PORT_STAT_SUSPEND) {
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debug("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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|
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if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
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debug("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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|
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if (portchange & USB_PORT_STAT_C_RESET) {
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debug("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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|
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return 0;
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}
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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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|
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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) &&
|
|
(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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debug("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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|