550 lines
15 KiB
C
550 lines
15 KiB
C
/*
|
|
* Most of this source has been derived from the Linux USB
|
|
* project:
|
|
* (C) Copyright Linus Torvalds 1999
|
|
* (C) Copyright Johannes Erdfelt 1999-2001
|
|
* (C) Copyright Andreas Gal 1999
|
|
* (C) Copyright Gregory P. Smith 1999
|
|
* (C) Copyright Deti Fliegl 1999 (new USB architecture)
|
|
* (C) Copyright Randy Dunlap 2000
|
|
* (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id)
|
|
* (C) Copyright Yggdrasil Computing, Inc. 2000
|
|
* (usb_device_id matching changes by Adam J. Richter)
|
|
*
|
|
* Adapted for U-Boot:
|
|
* (C) Copyright 2001 Denis Peter, MPL AG Switzerland
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
/****************************************************************************
|
|
* HUB "Driver"
|
|
* Probes device for being a hub and configurate it
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/unaligned.h>
|
|
#include <linux/ctype.h>
|
|
#include <asm/byteorder.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
#include <usb.h>
|
|
#ifdef CONFIG_4xx
|
|
#include <asm/4xx_pci.h>
|
|
#endif
|
|
|
|
#define USB_BUFSIZ 512
|
|
|
|
static struct usb_hub_device hub_dev[USB_MAX_HUB];
|
|
static int usb_hub_index;
|
|
|
|
__weak void usb_hub_reset_devices(int port)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
|
|
{
|
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
|
|
USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
static int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
|
|
{
|
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
|
|
port, NULL, 0, USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
static int usb_set_port_feature(struct usb_device *dev, int port, int feature)
|
|
{
|
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
|
|
port, NULL, 0, USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
static int usb_get_hub_status(struct usb_device *dev, void *data)
|
|
{
|
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
|
|
data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
static int usb_get_port_status(struct usb_device *dev, int port, void *data)
|
|
{
|
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
|
|
data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
|
|
}
|
|
|
|
|
|
static void usb_hub_power_on(struct usb_hub_device *hub)
|
|
{
|
|
int i;
|
|
struct usb_device *dev;
|
|
unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2;
|
|
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
|
|
unsigned short portstatus;
|
|
int ret;
|
|
|
|
dev = hub->pusb_dev;
|
|
|
|
/*
|
|
* Enable power to the ports:
|
|
* Here we Power-cycle the ports: aka,
|
|
* turning them off and turning on again.
|
|
*/
|
|
debug("enabling power on all ports\n");
|
|
for (i = 0; i < dev->maxchild; i++) {
|
|
usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
|
|
debug("port %d returns %lX\n", i + 1, dev->status);
|
|
}
|
|
|
|
/* Wait at least 2*bPwrOn2PwrGood for PP to change */
|
|
mdelay(pgood_delay);
|
|
|
|
for (i = 0; i < dev->maxchild; i++) {
|
|
ret = usb_get_port_status(dev, i + 1, portsts);
|
|
if (ret < 0) {
|
|
debug("port %d: get_port_status failed\n", i + 1);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Check to confirm the state of Port Power:
|
|
* xHCI says "After modifying PP, s/w shall read
|
|
* PP and confirm that it has reached the desired state
|
|
* before modifying it again, undefined behavior may occur
|
|
* if this procedure is not followed".
|
|
* EHCI doesn't say anything like this, but no harm in keeping
|
|
* this.
|
|
*/
|
|
portstatus = le16_to_cpu(portsts->wPortStatus);
|
|
if (portstatus & (USB_PORT_STAT_POWER << 1)) {
|
|
debug("port %d: Port power change failed\n", i + 1);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < dev->maxchild; i++) {
|
|
usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
|
|
debug("port %d returns %lX\n", i + 1, dev->status);
|
|
}
|
|
|
|
/*
|
|
* Wait for power to become stable,
|
|
* plus spec-defined max time for device to connect
|
|
*/
|
|
mdelay(pgood_delay + 1000);
|
|
}
|
|
|
|
void usb_hub_reset(void)
|
|
{
|
|
usb_hub_index = 0;
|
|
}
|
|
|
|
static struct usb_hub_device *usb_hub_allocate(void)
|
|
{
|
|
if (usb_hub_index < USB_MAX_HUB)
|
|
return &hub_dev[usb_hub_index++];
|
|
|
|
printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
|
|
return NULL;
|
|
}
|
|
|
|
#define MAX_TRIES 5
|
|
|
|
static inline char *portspeed(int portstatus)
|
|
{
|
|
char *speed_str;
|
|
|
|
switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
|
|
case USB_PORT_STAT_SUPER_SPEED:
|
|
speed_str = "5 Gb/s";
|
|
break;
|
|
case USB_PORT_STAT_HIGH_SPEED:
|
|
speed_str = "480 Mb/s";
|
|
break;
|
|
case USB_PORT_STAT_LOW_SPEED:
|
|
speed_str = "1.5 Mb/s";
|
|
break;
|
|
default:
|
|
speed_str = "12 Mb/s";
|
|
break;
|
|
}
|
|
|
|
return speed_str;
|
|
}
|
|
|
|
int hub_port_reset(struct usb_device *dev, int port,
|
|
unsigned short *portstat)
|
|
{
|
|
int tries;
|
|
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
|
|
unsigned short portstatus, portchange;
|
|
|
|
debug("hub_port_reset: resetting port %d...\n", port);
|
|
for (tries = 0; tries < MAX_TRIES; tries++) {
|
|
|
|
usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
|
|
mdelay(200);
|
|
|
|
if (usb_get_port_status(dev, port + 1, portsts) < 0) {
|
|
debug("get_port_status failed status %lX\n",
|
|
dev->status);
|
|
return -1;
|
|
}
|
|
portstatus = le16_to_cpu(portsts->wPortStatus);
|
|
portchange = le16_to_cpu(portsts->wPortChange);
|
|
|
|
debug("portstatus %x, change %x, %s\n", portstatus, portchange,
|
|
portspeed(portstatus));
|
|
|
|
debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
|
|
" USB_PORT_STAT_ENABLE %d\n",
|
|
(portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
|
|
(portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
|
|
(portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
|
|
|
|
if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
|
|
!(portstatus & USB_PORT_STAT_CONNECTION))
|
|
return -1;
|
|
|
|
if (portstatus & USB_PORT_STAT_ENABLE)
|
|
break;
|
|
|
|
mdelay(200);
|
|
}
|
|
|
|
if (tries == MAX_TRIES) {
|
|
debug("Cannot enable port %i after %i retries, " \
|
|
"disabling port.\n", port + 1, MAX_TRIES);
|
|
debug("Maybe the USB cable is bad?\n");
|
|
return -1;
|
|
}
|
|
|
|
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
|
|
*portstat = portstatus;
|
|
return 0;
|
|
}
|
|
|
|
|
|
void usb_hub_port_connect_change(struct usb_device *dev, int port)
|
|
{
|
|
struct usb_device *usb;
|
|
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
|
|
unsigned short portstatus;
|
|
|
|
/* Check status */
|
|
if (usb_get_port_status(dev, port + 1, portsts) < 0) {
|
|
debug("get_port_status failed\n");
|
|
return;
|
|
}
|
|
|
|
portstatus = le16_to_cpu(portsts->wPortStatus);
|
|
debug("portstatus %x, change %x, %s\n",
|
|
portstatus,
|
|
le16_to_cpu(portsts->wPortChange),
|
|
portspeed(portstatus));
|
|
|
|
/* Clear the connection change status */
|
|
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
|
|
|
|
/* Disconnect any existing devices under this port */
|
|
if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
|
|
(!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
|
|
debug("usb_disconnect(&hub->children[port]);\n");
|
|
/* Return now if nothing is connected */
|
|
if (!(portstatus & USB_PORT_STAT_CONNECTION))
|
|
return;
|
|
}
|
|
mdelay(200);
|
|
|
|
/* Reset the port */
|
|
if (hub_port_reset(dev, port, &portstatus) < 0) {
|
|
printf("cannot reset port %i!?\n", port + 1);
|
|
return;
|
|
}
|
|
|
|
mdelay(200);
|
|
|
|
/* Allocate a new device struct for it */
|
|
usb = usb_alloc_new_device(dev->controller);
|
|
|
|
switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
|
|
case USB_PORT_STAT_SUPER_SPEED:
|
|
usb->speed = USB_SPEED_SUPER;
|
|
break;
|
|
case USB_PORT_STAT_HIGH_SPEED:
|
|
usb->speed = USB_SPEED_HIGH;
|
|
break;
|
|
case USB_PORT_STAT_LOW_SPEED:
|
|
usb->speed = USB_SPEED_LOW;
|
|
break;
|
|
default:
|
|
usb->speed = USB_SPEED_FULL;
|
|
break;
|
|
}
|
|
|
|
dev->children[port] = usb;
|
|
usb->parent = dev;
|
|
usb->portnr = port + 1;
|
|
/* Run it through the hoops (find a driver, etc) */
|
|
if (usb_new_device(usb)) {
|
|
/* Woops, disable the port */
|
|
usb_free_device();
|
|
dev->children[port] = NULL;
|
|
debug("hub: disabling port %d\n", port + 1);
|
|
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
|
|
}
|
|
}
|
|
|
|
|
|
static int usb_hub_configure(struct usb_device *dev)
|
|
{
|
|
int i, length;
|
|
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
|
|
unsigned char *bitmap;
|
|
short hubCharacteristics;
|
|
struct usb_hub_descriptor *descriptor;
|
|
struct usb_hub_device *hub;
|
|
__maybe_unused struct usb_hub_status *hubsts;
|
|
|
|
/* "allocate" Hub device */
|
|
hub = usb_hub_allocate();
|
|
if (hub == NULL)
|
|
return -1;
|
|
hub->pusb_dev = dev;
|
|
/* Get the the hub descriptor */
|
|
if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
|
|
debug("usb_hub_configure: failed to get hub " \
|
|
"descriptor, giving up %lX\n", dev->status);
|
|
return -1;
|
|
}
|
|
descriptor = (struct usb_hub_descriptor *)buffer;
|
|
|
|
length = min(descriptor->bLength, sizeof(struct usb_hub_descriptor));
|
|
|
|
if (usb_get_hub_descriptor(dev, buffer, length) < 0) {
|
|
debug("usb_hub_configure: failed to get hub " \
|
|
"descriptor 2nd giving up %lX\n", dev->status);
|
|
return -1;
|
|
}
|
|
memcpy((unsigned char *)&hub->desc, buffer, length);
|
|
/* adjust 16bit values */
|
|
put_unaligned(le16_to_cpu(get_unaligned(
|
|
&descriptor->wHubCharacteristics)),
|
|
&hub->desc.wHubCharacteristics);
|
|
/* set the bitmap */
|
|
bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
|
|
/* devices not removable by default */
|
|
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
|
|
bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
|
|
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
|
|
|
|
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
|
|
hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
|
|
|
|
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
|
|
hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
|
|
|
|
dev->maxchild = descriptor->bNbrPorts;
|
|
debug("%d ports detected\n", dev->maxchild);
|
|
|
|
hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
|
|
switch (hubCharacteristics & HUB_CHAR_LPSM) {
|
|
case 0x00:
|
|
debug("ganged power switching\n");
|
|
break;
|
|
case 0x01:
|
|
debug("individual port power switching\n");
|
|
break;
|
|
case 0x02:
|
|
case 0x03:
|
|
debug("unknown reserved power switching mode\n");
|
|
break;
|
|
}
|
|
|
|
if (hubCharacteristics & HUB_CHAR_COMPOUND)
|
|
debug("part of a compound device\n");
|
|
else
|
|
debug("standalone hub\n");
|
|
|
|
switch (hubCharacteristics & HUB_CHAR_OCPM) {
|
|
case 0x00:
|
|
debug("global over-current protection\n");
|
|
break;
|
|
case 0x08:
|
|
debug("individual port over-current protection\n");
|
|
break;
|
|
case 0x10:
|
|
case 0x18:
|
|
debug("no over-current protection\n");
|
|
break;
|
|
}
|
|
|
|
debug("power on to power good time: %dms\n",
|
|
descriptor->bPwrOn2PwrGood * 2);
|
|
debug("hub controller current requirement: %dmA\n",
|
|
descriptor->bHubContrCurrent);
|
|
|
|
for (i = 0; i < dev->maxchild; i++)
|
|
debug("port %d is%s removable\n", i + 1,
|
|
hub->desc.DeviceRemovable[(i + 1) / 8] & \
|
|
(1 << ((i + 1) % 8)) ? " not" : "");
|
|
|
|
if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
|
|
debug("usb_hub_configure: failed to get Status - " \
|
|
"too long: %d\n", descriptor->bLength);
|
|
return -1;
|
|
}
|
|
|
|
if (usb_get_hub_status(dev, buffer) < 0) {
|
|
debug("usb_hub_configure: failed to get Status %lX\n",
|
|
dev->status);
|
|
return -1;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
hubsts = (struct usb_hub_status *)buffer;
|
|
#endif
|
|
|
|
debug("get_hub_status returned status %X, change %X\n",
|
|
le16_to_cpu(hubsts->wHubStatus),
|
|
le16_to_cpu(hubsts->wHubChange));
|
|
debug("local power source is %s\n",
|
|
(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
|
|
"lost (inactive)" : "good");
|
|
debug("%sover-current condition exists\n",
|
|
(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
|
|
"" : "no ");
|
|
usb_hub_power_on(hub);
|
|
|
|
/*
|
|
* Reset any devices that may be in a bad state when applying
|
|
* the power. This is a __weak function. Resetting of the devices
|
|
* should occur in the board file of the device.
|
|
*/
|
|
for (i = 0; i < dev->maxchild; i++)
|
|
usb_hub_reset_devices(i + 1);
|
|
|
|
for (i = 0; i < dev->maxchild; i++) {
|
|
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
|
|
unsigned short portstatus, portchange;
|
|
int ret;
|
|
ulong start = get_timer(0);
|
|
|
|
/*
|
|
* Wait for (whichever finishes first)
|
|
* - A maximum of 10 seconds
|
|
* This is a purely observational value driven by connecting
|
|
* a few broken pen drives and taking the max * 1.5 approach
|
|
* - connection_change and connection state to report same
|
|
* state
|
|
*/
|
|
do {
|
|
ret = usb_get_port_status(dev, i + 1, portsts);
|
|
if (ret < 0) {
|
|
debug("get_port_status failed\n");
|
|
break;
|
|
}
|
|
|
|
portstatus = le16_to_cpu(portsts->wPortStatus);
|
|
portchange = le16_to_cpu(portsts->wPortChange);
|
|
|
|
if ((portchange & USB_PORT_STAT_C_CONNECTION) ==
|
|
(portstatus & USB_PORT_STAT_CONNECTION))
|
|
break;
|
|
|
|
} while (get_timer(start) < CONFIG_SYS_HZ * 10);
|
|
|
|
if (ret < 0)
|
|
continue;
|
|
|
|
debug("Port %d Status %X Change %X\n",
|
|
i + 1, portstatus, portchange);
|
|
|
|
if (portchange & USB_PORT_STAT_C_CONNECTION) {
|
|
debug("port %d connection change\n", i + 1);
|
|
usb_hub_port_connect_change(dev, i);
|
|
}
|
|
if (portchange & USB_PORT_STAT_C_ENABLE) {
|
|
debug("port %d enable change, status %x\n",
|
|
i + 1, portstatus);
|
|
usb_clear_port_feature(dev, i + 1,
|
|
USB_PORT_FEAT_C_ENABLE);
|
|
/*
|
|
* The following hack causes a ghost device problem
|
|
* to Faraday EHCI
|
|
*/
|
|
#ifndef CONFIG_USB_EHCI_FARADAY
|
|
/* EM interference sometimes causes bad shielded USB
|
|
* devices to be shutdown by the hub, this hack enables
|
|
* them again. Works at least with mouse driver */
|
|
if (!(portstatus & USB_PORT_STAT_ENABLE) &&
|
|
(portstatus & USB_PORT_STAT_CONNECTION) &&
|
|
((dev->children[i]))) {
|
|
debug("already running port %i " \
|
|
"disabled by hub (EMI?), " \
|
|
"re-enabling...\n", i + 1);
|
|
usb_hub_port_connect_change(dev, i);
|
|
}
|
|
#endif
|
|
}
|
|
if (portstatus & USB_PORT_STAT_SUSPEND) {
|
|
debug("port %d suspend change\n", i + 1);
|
|
usb_clear_port_feature(dev, i + 1,
|
|
USB_PORT_FEAT_SUSPEND);
|
|
}
|
|
|
|
if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
|
|
debug("port %d over-current change\n", i + 1);
|
|
usb_clear_port_feature(dev, i + 1,
|
|
USB_PORT_FEAT_C_OVER_CURRENT);
|
|
usb_hub_power_on(hub);
|
|
}
|
|
|
|
if (portchange & USB_PORT_STAT_C_RESET) {
|
|
debug("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 */
|
|
debug("USB hub found\n");
|
|
ret = usb_hub_configure(dev);
|
|
return ret;
|
|
}
|