mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 11:00:15 +00:00
d81db48d41
The code shouldn't continue probing the port if get_port_status() failed. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Chin Liang See <clsee@altera.com> Cc: Dinh Nguyen <dinguyen@opensource.altera.com> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Stefan Roese <sr@denx.de> Cc: Stephen Warren <swarren@nvidia.com>
802 lines
21 KiB
C
802 lines
21 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 <dm.h>
|
|
#include <errno.h>
|
|
#include <memalign.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/unaligned.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/list.h>
|
|
#include <asm/byteorder.h>
|
|
#ifdef CONFIG_SANDBOX
|
|
#include <asm/state.h>
|
|
#endif
|
|
#include <asm/unaligned.h>
|
|
#include <dm/root.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#include <usb.h>
|
|
#ifdef CONFIG_4xx
|
|
#include <asm/4xx_pci.h>
|
|
#endif
|
|
|
|
#define USB_BUFSIZ 512
|
|
|
|
#define HUB_SHORT_RESET_TIME 20
|
|
#define HUB_LONG_RESET_TIME 200
|
|
|
|
#define PORT_OVERCURRENT_MAX_SCAN_COUNT 3
|
|
|
|
struct usb_device_scan {
|
|
struct usb_device *dev; /* USB hub device to scan */
|
|
struct usb_hub_device *hub; /* USB hub struct */
|
|
int port; /* USB port to scan */
|
|
struct list_head list;
|
|
};
|
|
|
|
/* TODO(sjg@chromium.org): Remove this when CONFIG_DM_USB is defined */
|
|
static struct usb_hub_device hub_dev[USB_MAX_HUB];
|
|
static int usb_hub_index;
|
|
static LIST_HEAD(usb_scan_list);
|
|
|
|
__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);
|
|
}
|
|
|
|
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;
|
|
const char *env;
|
|
|
|
dev = hub->pusb_dev;
|
|
|
|
debug("enabling power on all ports\n");
|
|
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);
|
|
}
|
|
|
|
#ifdef CONFIG_SANDBOX
|
|
/*
|
|
* Don't set timeout / delay values here. This results
|
|
* in these values still being reset to 0.
|
|
*/
|
|
if (state_get_skip_delays())
|
|
return;
|
|
#endif
|
|
|
|
/*
|
|
* Wait for power to become stable,
|
|
* plus spec-defined max time for device to connect
|
|
* but allow this time to be increased via env variable as some
|
|
* devices break the spec and require longer warm-up times
|
|
*/
|
|
env = getenv("usb_pgood_delay");
|
|
if (env)
|
|
pgood_delay = max(pgood_delay,
|
|
(unsigned)simple_strtol(env, NULL, 0));
|
|
debug("pgood_delay=%dms\n", pgood_delay);
|
|
|
|
/*
|
|
* Do a minimum delay of the larger value of 100ms or pgood_delay
|
|
* so that the power can stablize before the devices are queried
|
|
*/
|
|
hub->query_delay = get_timer(0) + max(100, (int)pgood_delay);
|
|
|
|
/*
|
|
* Record the power-on timeout here. The max. delay (timeout)
|
|
* will be done based on this value in the USB port loop in
|
|
* usb_hub_configure() later.
|
|
*/
|
|
hub->connect_timeout = hub->query_delay + 1000;
|
|
debug("devnum=%d poweron: query_delay=%d connect_timeout=%d\n",
|
|
dev->devnum, max(100, (int)pgood_delay),
|
|
max(100, (int)pgood_delay) + 1000);
|
|
}
|
|
|
|
void usb_hub_reset(void)
|
|
{
|
|
usb_hub_index = 0;
|
|
|
|
/* Zero out global hub_dev in case its re-used again */
|
|
memset(hub_dev, 0, sizeof(hub_dev));
|
|
}
|
|
|
|
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 legacy_hub_port_reset(struct usb_device *dev, int port,
|
|
unsigned short *portstat)
|
|
{
|
|
int err, tries;
|
|
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
|
|
unsigned short portstatus, portchange;
|
|
int delay = HUB_SHORT_RESET_TIME; /* start with short reset delay */
|
|
|
|
#ifdef CONFIG_DM_USB
|
|
debug("%s: resetting '%s' port %d...\n", __func__, dev->dev->name,
|
|
port + 1);
|
|
#else
|
|
debug("%s: resetting port %d...\n", __func__, port + 1);
|
|
#endif
|
|
for (tries = 0; tries < MAX_TRIES; tries++) {
|
|
err = usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
mdelay(delay);
|
|
|
|
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);
|
|
|
|
/*
|
|
* Perhaps we should check for the following here:
|
|
* - C_CONNECTION hasn't been set.
|
|
* - CONNECTION is still set.
|
|
*
|
|
* Doing so would ensure that the device is still connected
|
|
* to the bus, and hasn't been unplugged or replaced while the
|
|
* USB bus reset was going on.
|
|
*
|
|
* However, if we do that, then (at least) a San Disk Ultra
|
|
* USB 3.0 16GB device fails to reset on (at least) an NVIDIA
|
|
* Tegra Jetson TK1 board. For some reason, the device appears
|
|
* to briefly drop off the bus when this second bus reset is
|
|
* executed, yet if we retry this loop, it'll eventually come
|
|
* back after another reset or two.
|
|
*/
|
|
|
|
if (portstatus & USB_PORT_STAT_ENABLE)
|
|
break;
|
|
|
|
/* Switch to long reset delay for the next round */
|
|
delay = HUB_LONG_RESET_TIME;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_DM_USB
|
|
int hub_port_reset(struct udevice *dev, int port, unsigned short *portstat)
|
|
{
|
|
struct usb_device *udev = dev_get_parent_priv(dev);
|
|
|
|
return legacy_hub_port_reset(udev, port, portstat);
|
|
}
|
|
#endif
|
|
|
|
int usb_hub_port_connect_change(struct usb_device *dev, int port)
|
|
{
|
|
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
|
|
unsigned short portstatus;
|
|
int ret, speed;
|
|
|
|
/* Check status */
|
|
ret = usb_get_port_status(dev, port + 1, portsts);
|
|
if (ret < 0) {
|
|
debug("get_port_status failed\n");
|
|
return ret;
|
|
}
|
|
|
|
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))) ||
|
|
usb_device_has_child_on_port(dev, port)) {
|
|
debug("usb_disconnect(&hub->children[port]);\n");
|
|
/* Return now if nothing is connected */
|
|
if (!(portstatus & USB_PORT_STAT_CONNECTION))
|
|
return -ENOTCONN;
|
|
}
|
|
|
|
/* Reset the port */
|
|
ret = legacy_hub_port_reset(dev, port, &portstatus);
|
|
if (ret < 0) {
|
|
if (ret != -ENXIO)
|
|
printf("cannot reset port %i!?\n", port + 1);
|
|
return ret;
|
|
}
|
|
|
|
switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
|
|
case USB_PORT_STAT_SUPER_SPEED:
|
|
speed = USB_SPEED_SUPER;
|
|
break;
|
|
case USB_PORT_STAT_HIGH_SPEED:
|
|
speed = USB_SPEED_HIGH;
|
|
break;
|
|
case USB_PORT_STAT_LOW_SPEED:
|
|
speed = USB_SPEED_LOW;
|
|
break;
|
|
default:
|
|
speed = USB_SPEED_FULL;
|
|
break;
|
|
}
|
|
|
|
#ifdef CONFIG_DM_USB
|
|
struct udevice *child;
|
|
|
|
ret = usb_scan_device(dev->dev, port + 1, speed, &child);
|
|
#else
|
|
struct usb_device *usb;
|
|
|
|
ret = usb_alloc_new_device(dev->controller, &usb);
|
|
if (ret) {
|
|
printf("cannot create new device: ret=%d", ret);
|
|
return ret;
|
|
}
|
|
|
|
dev->children[port] = usb;
|
|
usb->speed = speed;
|
|
usb->parent = dev;
|
|
usb->portnr = port + 1;
|
|
/* Run it through the hoops (find a driver, etc) */
|
|
ret = usb_new_device(usb);
|
|
if (ret < 0) {
|
|
/* Woops, disable the port */
|
|
usb_free_device(dev->controller);
|
|
dev->children[port] = NULL;
|
|
}
|
|
#endif
|
|
if (ret < 0) {
|
|
debug("hub: disabling port %d\n", port + 1);
|
|
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int usb_scan_port(struct usb_device_scan *usb_scan)
|
|
{
|
|
ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
|
|
unsigned short portstatus;
|
|
unsigned short portchange;
|
|
struct usb_device *dev;
|
|
struct usb_hub_device *hub;
|
|
int ret = 0;
|
|
int i;
|
|
|
|
dev = usb_scan->dev;
|
|
hub = usb_scan->hub;
|
|
i = usb_scan->port;
|
|
|
|
/*
|
|
* Don't talk to the device before the query delay is expired.
|
|
* This is needed for voltages to stabalize.
|
|
*/
|
|
if (get_timer(0) < hub->query_delay)
|
|
return 0;
|
|
|
|
ret = usb_get_port_status(dev, i + 1, portsts);
|
|
if (ret < 0) {
|
|
debug("get_port_status failed\n");
|
|
if (get_timer(0) >= hub->connect_timeout) {
|
|
debug("devnum=%d port=%d: timeout\n",
|
|
dev->devnum, i + 1);
|
|
/* Remove this device from scanning list */
|
|
list_del(&usb_scan->list);
|
|
free(usb_scan);
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
portstatus = le16_to_cpu(portsts->wPortStatus);
|
|
portchange = le16_to_cpu(portsts->wPortChange);
|
|
debug("Port %d Status %X Change %X\n", i + 1, portstatus, portchange);
|
|
|
|
/* No connection change happened, wait a bit more. */
|
|
if (!(portchange & USB_PORT_STAT_C_CONNECTION)) {
|
|
if (get_timer(0) >= hub->connect_timeout) {
|
|
debug("devnum=%d port=%d: timeout\n",
|
|
dev->devnum, i + 1);
|
|
/* Remove this device from scanning list */
|
|
list_del(&usb_scan->list);
|
|
free(usb_scan);
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Test if the connection came up, and if not exit */
|
|
if (!(portstatus & USB_PORT_STAT_CONNECTION))
|
|
return 0;
|
|
|
|
/* A new USB device is ready at this point */
|
|
debug("devnum=%d port=%d: USB dev found\n", dev->devnum, 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) &&
|
|
usb_device_has_child_on_port(dev, 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);
|
|
/* Only power-on this one port */
|
|
usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
|
|
hub->overcurrent_count[i]++;
|
|
|
|
/*
|
|
* If the max-scan-count is not reached, return without removing
|
|
* the device from scan-list. This will re-issue a new scan.
|
|
*/
|
|
if (hub->overcurrent_count[i] <=
|
|
PORT_OVERCURRENT_MAX_SCAN_COUNT)
|
|
return 0;
|
|
|
|
/* Otherwise the device will get removed */
|
|
printf("Port %d over-current occurred %d times\n", i + 1,
|
|
hub->overcurrent_count[i]);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* We're done with this device, so let's remove this device from
|
|
* scanning list
|
|
*/
|
|
list_del(&usb_scan->list);
|
|
free(usb_scan);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usb_device_list_scan(void)
|
|
{
|
|
struct usb_device_scan *usb_scan;
|
|
struct usb_device_scan *tmp;
|
|
static int running;
|
|
int ret = 0;
|
|
|
|
/* Only run this loop once for each controller */
|
|
if (running)
|
|
return 0;
|
|
|
|
running = 1;
|
|
|
|
while (1) {
|
|
/* We're done, once the list is empty again */
|
|
if (list_empty(&usb_scan_list))
|
|
goto out;
|
|
|
|
list_for_each_entry_safe(usb_scan, tmp, &usb_scan_list, list) {
|
|
int ret;
|
|
|
|
/* Scan this port */
|
|
ret = usb_scan_port(usb_scan);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
out:
|
|
/*
|
|
* This USB controller has finished scanning all its connected
|
|
* USB devices. Set "running" back to 0, so that other USB controllers
|
|
* will scan their devices too.
|
|
*/
|
|
running = 0;
|
|
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
int ret;
|
|
|
|
/* "allocate" Hub device */
|
|
hub = usb_hub_allocate();
|
|
if (hub == NULL)
|
|
return -ENOMEM;
|
|
hub->pusb_dev = dev;
|
|
/* Get the the hub descriptor */
|
|
ret = usb_get_hub_descriptor(dev, buffer, 4);
|
|
if (ret < 0) {
|
|
debug("usb_hub_configure: failed to get hub " \
|
|
"descriptor, giving up %lX\n", dev->status);
|
|
return ret;
|
|
}
|
|
descriptor = (struct usb_hub_descriptor *)buffer;
|
|
|
|
length = min_t(int, descriptor->bLength,
|
|
sizeof(struct usb_hub_descriptor));
|
|
|
|
ret = usb_get_hub_descriptor(dev, buffer, length);
|
|
if (ret < 0) {
|
|
debug("usb_hub_configure: failed to get hub " \
|
|
"descriptor 2nd giving up %lX\n", dev->status);
|
|
return ret;
|
|
}
|
|
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 -EFBIG;
|
|
}
|
|
|
|
ret = usb_get_hub_status(dev, buffer);
|
|
if (ret < 0) {
|
|
debug("usb_hub_configure: failed to get Status %lX\n",
|
|
dev->status);
|
|
return ret;
|
|
}
|
|
|
|
#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);
|
|
|
|
/*
|
|
* Only add the connected USB devices, including potential hubs,
|
|
* to a scanning list. This list will get scanned and devices that
|
|
* are detected (either via port connected or via port timeout)
|
|
* will get removed from this list. Scanning of the devices on this
|
|
* list will continue until all devices are removed.
|
|
*/
|
|
for (i = 0; i < dev->maxchild; i++) {
|
|
struct usb_device_scan *usb_scan;
|
|
|
|
usb_scan = calloc(1, sizeof(*usb_scan));
|
|
if (!usb_scan) {
|
|
printf("Can't allocate memory for USB device!\n");
|
|
return -ENOMEM;
|
|
}
|
|
usb_scan->dev = dev;
|
|
usb_scan->hub = hub;
|
|
usb_scan->port = i;
|
|
list_add_tail(&usb_scan->list, &usb_scan_list);
|
|
}
|
|
|
|
/*
|
|
* And now call the scanning code which loops over the generated list
|
|
*/
|
|
ret = usb_device_list_scan();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int usb_hub_check(struct usb_device *dev, int ifnum)
|
|
{
|
|
struct usb_interface *iface;
|
|
struct usb_endpoint_descriptor *ep = NULL;
|
|
|
|
iface = &dev->config.if_desc[ifnum];
|
|
/* Is it a hub? */
|
|
if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
|
|
goto err;
|
|
/* 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))
|
|
goto err;
|
|
/* Multiple endpoints? What kind of mutant ninja-hub is this? */
|
|
if (iface->desc.bNumEndpoints != 1)
|
|
goto err;
|
|
ep = &iface->ep_desc[0];
|
|
/* Output endpoint? Curiousier and curiousier.. */
|
|
if (!(ep->bEndpointAddress & USB_DIR_IN))
|
|
goto err;
|
|
/* If it's not an interrupt endpoint, we'd better punt! */
|
|
if ((ep->bmAttributes & 3) != 3)
|
|
goto err;
|
|
/* We found a hub */
|
|
debug("USB hub found\n");
|
|
return 0;
|
|
|
|
err:
|
|
debug("USB hub not found: bInterfaceClass=%d, bInterfaceSubClass=%d, bNumEndpoints=%d\n",
|
|
iface->desc.bInterfaceClass, iface->desc.bInterfaceSubClass,
|
|
iface->desc.bNumEndpoints);
|
|
if (ep) {
|
|
debug(" bEndpointAddress=%#x, bmAttributes=%d",
|
|
ep->bEndpointAddress, ep->bmAttributes);
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
int usb_hub_probe(struct usb_device *dev, int ifnum)
|
|
{
|
|
int ret;
|
|
|
|
ret = usb_hub_check(dev, ifnum);
|
|
if (ret)
|
|
return 0;
|
|
ret = usb_hub_configure(dev);
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_DM_USB
|
|
int usb_hub_scan(struct udevice *hub)
|
|
{
|
|
struct usb_device *udev = dev_get_parent_priv(hub);
|
|
|
|
return usb_hub_configure(udev);
|
|
}
|
|
|
|
static int usb_hub_post_bind(struct udevice *dev)
|
|
{
|
|
/* Scan the bus for devices */
|
|
return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
|
|
}
|
|
|
|
static int usb_hub_post_probe(struct udevice *dev)
|
|
{
|
|
debug("%s\n", __func__);
|
|
return usb_hub_scan(dev);
|
|
}
|
|
|
|
static const struct udevice_id usb_hub_ids[] = {
|
|
{ .compatible = "usb-hub" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(usb_generic_hub) = {
|
|
.name = "usb_hub",
|
|
.id = UCLASS_USB_HUB,
|
|
.of_match = usb_hub_ids,
|
|
.flags = DM_FLAG_ALLOC_PRIV_DMA,
|
|
};
|
|
|
|
UCLASS_DRIVER(usb_hub) = {
|
|
.id = UCLASS_USB_HUB,
|
|
.name = "usb_hub",
|
|
.post_bind = usb_hub_post_bind,
|
|
.post_probe = usb_hub_post_probe,
|
|
.child_pre_probe = usb_child_pre_probe,
|
|
.per_child_auto_alloc_size = sizeof(struct usb_device),
|
|
.per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata),
|
|
};
|
|
|
|
static const struct usb_device_id hub_id_table[] = {
|
|
{
|
|
.match_flags = USB_DEVICE_ID_MATCH_DEV_CLASS,
|
|
.bDeviceClass = USB_CLASS_HUB
|
|
},
|
|
{ } /* Terminating entry */
|
|
};
|
|
|
|
U_BOOT_USB_DEVICE(usb_generic_hub, hub_id_table);
|
|
|
|
#endif
|