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https://github.com/brain-hackers/u-boot-brain
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![Simon Glass](/assets/img/avatar_default.png)
Move env_get() over to the new header file. Acked-by: Joe Hershberger <joe.hershberger@ni.com> Signed-off-by: Simon Glass <sjg@chromium.org>
974 lines
26 KiB
C
974 lines
26 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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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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/****************************************************************************
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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 <dm.h>
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#include <env.h>
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#include <errno.h>
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#include <memalign.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 <linux/list.h>
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#include <asm/byteorder.h>
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#ifdef CONFIG_SANDBOX
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#include <asm/state.h>
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#endif
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#include <asm/unaligned.h>
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#include <usb.h>
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#define USB_BUFSIZ 512
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#define HUB_SHORT_RESET_TIME 20
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#define HUB_LONG_RESET_TIME 200
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#define PORT_OVERCURRENT_MAX_SCAN_COUNT 3
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struct usb_device_scan {
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struct usb_device *dev; /* USB hub device to scan */
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struct usb_hub_device *hub; /* USB hub struct */
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int port; /* USB port to scan */
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struct list_head list;
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};
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static LIST_HEAD(usb_scan_list);
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__weak void usb_hub_reset_devices(struct usb_hub_device *hub, int port)
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{
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return;
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}
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static inline bool usb_hub_is_superspeed(struct usb_device *hdev)
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{
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return hdev->descriptor.bDeviceProtocol == 3;
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}
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#if CONFIG_IS_ENABLED(DM_USB)
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bool usb_hub_is_root_hub(struct udevice *hub)
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{
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if (device_get_uclass_id(hub->parent) != UCLASS_USB_HUB)
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return true;
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return false;
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}
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static int usb_set_hub_depth(struct usb_device *dev, int depth)
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{
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if (depth < 0 || depth > 4)
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return -EINVAL;
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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USB_REQ_SET_HUB_DEPTH, USB_DIR_OUT | USB_RT_HUB,
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depth, 0, NULL, 0, USB_CNTL_TIMEOUT);
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}
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#endif
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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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unsigned short dtype = USB_DT_HUB;
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if (usb_hub_is_superspeed(dev))
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dtype = USB_DT_SS_HUB;
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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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dtype << 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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int usb_get_port_status(struct usb_device *dev, int port, void *data)
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{
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int ret;
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ret = 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_port_status), USB_CNTL_TIMEOUT);
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#if CONFIG_IS_ENABLED(DM_USB)
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if (ret < 0)
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return ret;
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/*
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* Translate the USB 3.0 hub port status field into the old version
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* that U-Boot understands. Do this only when the hub is not root hub.
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* For root hub, the port status field has already been translated
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* in the host controller driver (see xhci_submit_root() in xhci.c).
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*
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* Note: this only supports driver model.
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*/
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if (!usb_hub_is_root_hub(dev->dev) && usb_hub_is_superspeed(dev)) {
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struct usb_port_status *status = (struct usb_port_status *)data;
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u16 tmp = (status->wPortStatus) & USB_SS_PORT_STAT_MASK;
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if (status->wPortStatus & USB_SS_PORT_STAT_POWER)
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tmp |= USB_PORT_STAT_POWER;
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if ((status->wPortStatus & USB_SS_PORT_STAT_SPEED) ==
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USB_SS_PORT_STAT_SPEED_5GBPS)
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tmp |= USB_PORT_STAT_SUPER_SPEED;
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status->wPortStatus = tmp;
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}
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#endif
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return ret;
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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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const char *env;
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dev = hub->pusb_dev;
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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_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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#ifdef CONFIG_SANDBOX
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/*
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* Don't set timeout / delay values here. This results
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* in these values still being reset to 0.
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*/
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if (state_get_skip_delays())
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return;
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#endif
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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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* but allow this time to be increased via env variable as some
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* devices break the spec and require longer warm-up times
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*/
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env = env_get("usb_pgood_delay");
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if (env)
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pgood_delay = max(pgood_delay,
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(unsigned)simple_strtol(env, NULL, 0));
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debug("pgood_delay=%dms\n", pgood_delay);
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/*
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* Do a minimum delay of the larger value of 100ms or pgood_delay
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* so that the power can stablize before the devices are queried
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*/
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hub->query_delay = get_timer(0) + max(100, (int)pgood_delay);
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/*
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* Record the power-on timeout here. The max. delay (timeout)
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* will be done based on this value in the USB port loop in
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* usb_hub_configure() later.
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*/
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hub->connect_timeout = hub->query_delay + 1000;
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debug("devnum=%d poweron: query_delay=%d connect_timeout=%d\n",
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dev->devnum, max(100, (int)pgood_delay),
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max(100, (int)pgood_delay) + 1000);
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}
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#if !CONFIG_IS_ENABLED(DM_USB)
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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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void usb_hub_reset(void)
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{
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usb_hub_index = 0;
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/* Zero out global hub_dev in case its re-used again */
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memset(hub_dev, 0, sizeof(hub_dev));
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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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#endif
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#define MAX_TRIES 5
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static inline const char *portspeed(int portstatus)
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{
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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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return "5 Gb/s";
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case USB_PORT_STAT_HIGH_SPEED:
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return "480 Mb/s";
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case USB_PORT_STAT_LOW_SPEED:
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return "1.5 Mb/s";
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default:
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return "12 Mb/s";
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}
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}
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/**
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* usb_hub_port_reset() - reset a port given its usb_device pointer
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*
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* Reset a hub port and see if a device is present on that port, providing
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* sufficient time for it to show itself. The port status is returned.
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*
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* @dev: USB device to reset
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* @port: Port number to reset (note ports are numbered from 0 here)
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* @portstat: Returns port status
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*/
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static int usb_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 err, 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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int delay = HUB_SHORT_RESET_TIME; /* start with short reset delay */
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#if CONFIG_IS_ENABLED(DM_USB)
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debug("%s: resetting '%s' port %d...\n", __func__, dev->dev->name,
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port + 1);
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#else
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debug("%s: resetting port %d...\n", __func__, port + 1);
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#endif
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for (tries = 0; tries < MAX_TRIES; tries++) {
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err = usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
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if (err < 0)
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return err;
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mdelay(delay);
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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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/* Switch to long reset delay for the next round */
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delay = HUB_LONG_RESET_TIME;
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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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int usb_hub_port_connect_change(struct usb_device *dev, int port)
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{
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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, speed;
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/* Check status */
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ret = usb_get_port_status(dev, port + 1, portsts);
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if (ret < 0) {
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debug("get_port_status failed\n");
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return ret;
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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))) ||
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usb_device_has_child_on_port(dev, 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 -ENOTCONN;
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}
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/* Reset the port */
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ret = usb_hub_port_reset(dev, port, &portstatus);
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if (ret < 0) {
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if (ret != -ENXIO)
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printf("cannot reset port %i!?\n", port + 1);
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return ret;
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}
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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 = USB_SPEED_SUPER;
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break;
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case USB_PORT_STAT_HIGH_SPEED:
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speed = USB_SPEED_HIGH;
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break;
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case USB_PORT_STAT_LOW_SPEED:
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speed = USB_SPEED_LOW;
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break;
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default:
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speed = USB_SPEED_FULL;
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break;
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}
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#if CONFIG_IS_ENABLED(DM_USB)
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struct udevice *child;
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ret = usb_scan_device(dev->dev, port + 1, speed, &child);
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#else
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struct usb_device *usb;
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ret = usb_alloc_new_device(dev->controller, &usb);
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if (ret) {
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printf("cannot create new device: ret=%d", ret);
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return ret;
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}
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dev->children[port] = usb;
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usb->speed = speed;
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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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ret = usb_new_device(usb);
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if (ret < 0) {
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/* Woops, disable the port */
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usb_free_device(dev->controller);
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dev->children[port] = NULL;
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}
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#endif
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if (ret < 0) {
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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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return ret;
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}
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static int usb_scan_port(struct usb_device_scan *usb_scan)
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{
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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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unsigned short portchange;
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struct usb_device *dev;
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struct usb_hub_device *hub;
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int ret = 0;
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int i;
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dev = usb_scan->dev;
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hub = usb_scan->hub;
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i = usb_scan->port;
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/*
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* Don't talk to the device before the query delay is expired.
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* This is needed for voltages to stabalize.
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*/
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if (get_timer(0) < hub->query_delay)
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return 0;
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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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if (get_timer(0) >= hub->connect_timeout) {
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debug("devnum=%d port=%d: timeout\n",
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dev->devnum, i + 1);
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/* Remove this device from scanning list */
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list_del(&usb_scan->list);
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free(usb_scan);
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return 0;
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}
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return 0;
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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("Port %d Status %X Change %X\n", i + 1, portstatus, portchange);
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/*
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* No connection change happened, wait a bit more.
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*
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* For some situation, the hub reports no connection change but a
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* device is connected to the port (eg: CCS bit is set but CSC is not
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* in the PORTSC register of a root hub), ignore such case.
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*/
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if (!(portchange & USB_PORT_STAT_C_CONNECTION) &&
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!(portstatus & USB_PORT_STAT_CONNECTION)) {
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if (get_timer(0) >= hub->connect_timeout) {
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debug("devnum=%d port=%d: timeout\n",
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dev->devnum, i + 1);
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/* Remove this device from scanning list */
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list_del(&usb_scan->list);
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free(usb_scan);
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return 0;
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}
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return 0;
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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, USB_PORT_FEAT_C_RESET);
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}
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if ((portchange & USB_SS_PORT_STAT_C_BH_RESET) &&
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usb_hub_is_superspeed(dev)) {
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debug("port %d BH reset change\n", i + 1);
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usb_clear_port_feature(dev, i + 1, USB_SS_PORT_FEAT_C_BH_RESET);
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}
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/* A new USB device is ready at this point */
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debug("devnum=%d port=%d: USB dev found\n", dev->devnum, i + 1);
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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]);
|
|
}
|
|
|
|
/*
|
|
* 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 struct usb_hub_device *usb_get_hub_device(struct usb_device *dev)
|
|
{
|
|
struct usb_hub_device *hub;
|
|
|
|
#if !CONFIG_IS_ENABLED(DM_USB)
|
|
/* "allocate" Hub device */
|
|
hub = usb_hub_allocate();
|
|
#else
|
|
hub = dev_get_uclass_priv(dev->dev);
|
|
#endif
|
|
|
|
return hub;
|
|
}
|
|
|
|
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;
|
|
struct usb_hub_status *hubsts;
|
|
int ret;
|
|
|
|
hub = usb_get_hub_device(dev);
|
|
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.u.hs.DeviceRemovable[0];
|
|
/* devices not removable by default */
|
|
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
|
|
bitmap = (unsigned char *)&hub->desc.u.hs.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.u.hs.DeviceRemovable[i] =
|
|
descriptor->u.hs.DeviceRemovable[i];
|
|
|
|
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
|
|
hub->desc.u.hs.PortPowerCtrlMask[i] =
|
|
descriptor->u.hs.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;
|
|
}
|
|
|
|
switch (dev->descriptor.bDeviceProtocol) {
|
|
case USB_HUB_PR_FS:
|
|
break;
|
|
case USB_HUB_PR_HS_SINGLE_TT:
|
|
debug("Single TT\n");
|
|
break;
|
|
case USB_HUB_PR_HS_MULTI_TT:
|
|
ret = usb_set_interface(dev, 0, 1);
|
|
if (ret == 0) {
|
|
debug("TT per port\n");
|
|
hub->tt.multi = true;
|
|
} else {
|
|
debug("Using single TT (err %d)\n", ret);
|
|
}
|
|
break;
|
|
case USB_HUB_PR_SS:
|
|
/* USB 3.0 hubs don't have a TT */
|
|
break;
|
|
default:
|
|
debug("Unrecognized hub protocol %d\n",
|
|
dev->descriptor.bDeviceProtocol);
|
|
break;
|
|
}
|
|
|
|
/* Note 8 FS bit times == (8 bits / 12000000 bps) ~= 666ns */
|
|
switch (hubCharacteristics & HUB_CHAR_TTTT) {
|
|
case HUB_TTTT_8_BITS:
|
|
if (dev->descriptor.bDeviceProtocol != 0) {
|
|
hub->tt.think_time = 666;
|
|
debug("TT requires at most %d FS bit times (%d ns)\n",
|
|
8, hub->tt.think_time);
|
|
}
|
|
break;
|
|
case HUB_TTTT_16_BITS:
|
|
hub->tt.think_time = 666 * 2;
|
|
debug("TT requires at most %d FS bit times (%d ns)\n",
|
|
16, hub->tt.think_time);
|
|
break;
|
|
case HUB_TTTT_24_BITS:
|
|
hub->tt.think_time = 666 * 3;
|
|
debug("TT requires at most %d FS bit times (%d ns)\n",
|
|
24, hub->tt.think_time);
|
|
break;
|
|
case HUB_TTTT_32_BITS:
|
|
hub->tt.think_time = 666 * 4;
|
|
debug("TT requires at most %d FS bit times (%d ns)\n",
|
|
32, hub->tt.think_time);
|
|
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.u.hs.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;
|
|
}
|
|
|
|
hubsts = (struct usb_hub_status *)buffer;
|
|
|
|
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 ");
|
|
|
|
#if CONFIG_IS_ENABLED(DM_USB)
|
|
/*
|
|
* Update USB host controller's internal representation of this hub
|
|
* after the hub descriptor is fetched.
|
|
*/
|
|
ret = usb_update_hub_device(dev);
|
|
if (ret < 0 && ret != -ENOSYS) {
|
|
debug("%s: failed to update hub device for HCD (%x)\n",
|
|
__func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* A maximum of seven tiers are allowed in a USB topology, and the
|
|
* root hub occupies the first tier. The last tier ends with a normal
|
|
* USB device. USB 3.0 hubs use a 20-bit field called 'route string'
|
|
* to route packets to the designated downstream port. The hub uses a
|
|
* hub depth value multiplied by four as an offset into the 'route
|
|
* string' to locate the bits it uses to determine the downstream
|
|
* port number.
|
|
*/
|
|
if (usb_hub_is_root_hub(dev->dev)) {
|
|
hub->hub_depth = -1;
|
|
} else {
|
|
struct udevice *hdev;
|
|
int depth = 0;
|
|
|
|
hdev = dev->dev->parent;
|
|
while (!usb_hub_is_root_hub(hdev)) {
|
|
depth++;
|
|
hdev = hdev->parent;
|
|
}
|
|
|
|
hub->hub_depth = depth;
|
|
|
|
if (usb_hub_is_superspeed(dev)) {
|
|
debug("set hub (%p) depth to %d\n", dev, depth);
|
|
/*
|
|
* This request sets the value that the hub uses to
|
|
* determine the index into the 'route string index'
|
|
* for this hub.
|
|
*/
|
|
ret = usb_set_hub_depth(dev, depth);
|
|
if (ret < 0) {
|
|
debug("%s: failed to set hub depth (%lX)\n",
|
|
__func__, dev->status);
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
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(hub, 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;
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(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_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 = dm_scan_fdt_dev,
|
|
.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),
|
|
.per_device_auto_alloc_size = sizeof(struct usb_hub_device),
|
|
};
|
|
|
|
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
|