mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 00:48:52 +09:00
![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
981 lines
26 KiB
C
981 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 <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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#ifdef CONFIG_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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#ifdef CONFIG_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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#ifndef CONFIG_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 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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/**
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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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#ifdef CONFIG_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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#ifdef CONFIG_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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/*
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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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/*
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|
* No connection change happened, wait a bit more.
|
|
*
|
|
* For some situation, the hub reports no connection change but a
|
|
* device is connected to the port (eg: CCS bit is set but CSC is not
|
|
* in the PORTSC register of a root hub), ignore such case.
|
|
*/
|
|
if (!(portchange & USB_PORT_STAT_C_CONNECTION) &&
|
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!(portstatus & USB_PORT_STAT_CONNECTION)) {
|
|
if (get_timer(0) >= hub->connect_timeout) {
|
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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;
|
|
}
|
|
|
|
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);
|
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}
|
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|
|
if ((portchange & USB_SS_PORT_STAT_C_BH_RESET) &&
|
|
usb_hub_is_superspeed(dev)) {
|
|
debug("port %d BH reset change\n", i + 1);
|
|
usb_clear_port_feature(dev, i + 1, USB_SS_PORT_FEAT_C_BH_RESET);
|
|
}
|
|
|
|
/* 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]);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
#ifndef CONFIG_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 ");
|
|
|
|
#ifdef CONFIG_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;
|
|
}
|
|
|
|
#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_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
|