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common/usb_hub.c
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// 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 * project: * (C) Copyright Linus Torvalds 1999 * (C) Copyright Johannes Erdfelt 1999-2001 * (C) Copyright Andreas Gal 1999 * (C) Copyright Gregory P. Smith 1999 * (C) Copyright Deti Fliegl 1999 (new USB architecture) * (C) Copyright Randy Dunlap 2000 * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id) * (C) Copyright Yggdrasil Computing, Inc. 2000 * (usb_device_id matching changes by Adam J. Richter) * * Adapted for U-Boot: * (C) Copyright 2001 Denis Peter, MPL AG Switzerland |
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*/ /**************************************************************************** * HUB "Driver" * Probes device for being a hub and configurate it */ #include <common.h> #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 <malloc.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 #include <asm/state.h> #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 #define HUB_LONG_RESET_TIME 200 |
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#define PORT_OVERCURRENT_MAX_SCAN_COUNT 3 struct usb_device_scan { struct usb_device *dev; /* USB hub device to scan */ struct usb_hub_device *hub; /* USB hub struct */ int port; /* USB port to scan */ struct list_head list; }; |
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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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{ return; } |
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static inline bool usb_hub_is_superspeed(struct usb_device *hdev) { return hdev->descriptor.bDeviceProtocol == 3; } |
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#if CONFIG_IS_ENABLED(DM_USB) |
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bool usb_hub_is_root_hub(struct udevice *hub) { if (device_get_uclass_id(hub->parent) != UCLASS_USB_HUB) return true; return false; } |
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static int usb_set_hub_depth(struct usb_device *dev, int depth) { if (depth < 0 || depth > 4) return -EINVAL; return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_HUB_DEPTH, USB_DIR_OUT | USB_RT_HUB, depth, 0, NULL, 0, USB_CNTL_TIMEOUT); } |
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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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unsigned short dtype = USB_DT_HUB; if (usb_hub_is_superspeed(dev)) dtype = USB_DT_SS_HUB; |
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return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 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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} static int usb_clear_port_feature(struct usb_device *dev, int port, int feature) { return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT); } static int usb_set_port_feature(struct usb_device *dev, int port, int feature) { return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT); } static int usb_get_hub_status(struct usb_device *dev, void *data) { return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0, data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT); } |
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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; 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) return ret; /* * Translate the USB 3.0 hub port status field into the old version * that U-Boot understands. Do this only when the hub is not root hub. * For root hub, the port status field has already been translated * in the host controller driver (see xhci_submit_root() in xhci.c). * * Note: this only supports driver model. */ if (!usb_hub_is_root_hub(dev->dev) && usb_hub_is_superspeed(dev)) { struct usb_port_status *status = (struct usb_port_status *)data; u16 tmp = (status->wPortStatus) & USB_SS_PORT_STAT_MASK; if (status->wPortStatus & USB_SS_PORT_STAT_POWER) tmp |= USB_PORT_STAT_POWER; if ((status->wPortStatus & USB_SS_PORT_STAT_SPEED) == USB_SS_PORT_STAT_SPEED_5GBPS) tmp |= USB_PORT_STAT_SUPER_SPEED; status->wPortStatus = tmp; } #endif return ret; |
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} static void usb_hub_power_on(struct usb_hub_device *hub) { int i; 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 "); |
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for (i = 0; i < dev->maxchild; i++) { usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER); |
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debug("port %d returns %lX ", i + 1, dev->status); |
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} |
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#ifdef CONFIG_SANDBOX /* * Don't set timeout / delay values here. This results * in these values still being reset to 0. */ if (state_get_skip_delays()) return; #endif |
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/* * Wait for power to become stable, * 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 * 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) pgood_delay = max(pgood_delay, (unsigned)simple_strtol(env, NULL, 0)); debug("pgood_delay=%dms ", pgood_delay); |
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/* * Do a minimum delay of the larger value of 100ms or pgood_delay * so that the power can stablize before the devices are queried */ hub->query_delay = get_timer(0) + max(100, (int)pgood_delay); /* * Record the power-on timeout here. The max. delay (timeout) * will be done based on this value in the USB port loop in * usb_hub_configure() later. */ hub->connect_timeout = hub->query_delay + 1000; debug("devnum=%d poweron: query_delay=%d connect_timeout=%d ", dev->devnum, max(100, (int)pgood_delay), 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]; static int usb_hub_index; |
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void usb_hub_reset(void) { usb_hub_index = 0; |
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/* Zero out global hub_dev in case its re-used again */ memset(hub_dev, 0, sizeof(hub_dev)); |
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} static struct usb_hub_device *usb_hub_allocate(void) { if (usb_hub_index < USB_MAX_HUB) return &hub_dev[usb_hub_index++]; printf("ERROR: USB_MAX_HUB (%d) reached ", USB_MAX_HUB); return NULL; } |
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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) { 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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/** * usb_hub_port_reset() - reset a port given its usb_device pointer * * Reset a hub port and see if a device is present on that port, providing * sufficient time for it to show itself. The port status is returned. * * @dev: USB device to reset * @port: Port number to reset (note ports are numbered from 0 here) * @portstat: Returns port status */ static int usb_hub_port_reset(struct usb_device *dev, int port, 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... ", __func__, dev->dev->name, port + 1); #else debug("%s: resetting port %d... ", __func__, port + 1); #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); if (err < 0) 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 ", dev->status); |
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return -1; } |
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portstatus = le16_to_cpu(portsts->wPortStatus); portchange = le16_to_cpu(portsts->wPortChange); |
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debug("portstatus %x, change %x, %s ", portstatus, portchange, portspeed(portstatus)); |
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debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \ " USB_PORT_STAT_ENABLE %d ", (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0, (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0, (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0); |
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/* * Perhaps we should check for the following here: * - C_CONNECTION hasn't been set. * - CONNECTION is still set. * * Doing so would ensure that the device is still connected * to the bus, and hasn't been unplugged or replaced while the * USB bus reset was going on. * * However, if we do that, then (at least) a San Disk Ultra * USB 3.0 16GB device fails to reset on (at least) an NVIDIA * Tegra Jetson TK1 board. For some reason, the device appears * to briefly drop off the bus when this second bus reset is * executed, yet if we retry this loop, it'll eventually come * back after another reset or two. */ |
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if (portstatus & USB_PORT_STAT_ENABLE) break; |
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/* Switch to long reset delay for the next round */ delay = HUB_LONG_RESET_TIME; |
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} if (tries == MAX_TRIES) { |
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debug("Cannot enable port %i after %i retries, " \ "disabling port. ", port + 1, MAX_TRIES); debug("Maybe the USB cable is bad? "); |
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return -1; } usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET); *portstat = portstatus; return 0; } |
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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); if (ret < 0) { |
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debug("get_port_status failed "); |
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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 ", portstatus, le16_to_cpu(portsts->wPortChange), portspeed(portstatus)); |
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/* Clear the connection change status */ usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION); /* Disconnect any existing devices under this port */ if (((!(portstatus & USB_PORT_STAT_CONNECTION)) && |
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(!(portstatus & USB_PORT_STAT_ENABLE))) || usb_device_has_child_on_port(dev, port)) { |
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debug("usb_disconnect(&hub->children[port]); "); |
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/* Return now if nothing is connected */ 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) printf("cannot reset port %i!? ", port + 1); |
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return ret; |
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} |
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switch (portstatus & USB_PORT_STAT_SPEED_MASK) { case USB_PORT_STAT_SUPER_SPEED: |
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speed = USB_SPEED_SUPER; |
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break; case USB_PORT_STAT_HIGH_SPEED: |
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speed = USB_SPEED_HIGH; |
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break; case USB_PORT_STAT_LOW_SPEED: |
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speed = USB_SPEED_LOW; |
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break; default: |
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speed = USB_SPEED_FULL; |
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break; } |
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#if CONFIG_IS_ENABLED(DM_USB) |
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struct udevice *child; ret = usb_scan_device(dev->dev, port + 1, speed, &child); #else struct usb_device *usb; |
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ret = usb_alloc_new_device(dev->controller, &usb); if (ret) { printf("cannot create new device: ret=%d", ret); return ret; } |
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dev->children[port] = usb; |
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usb->speed = speed; |
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usb->parent = dev; usb->portnr = port + 1; /* Run it through the hoops (find a driver, etc) */ |
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ret = usb_new_device(usb); 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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} #endif if (ret < 0) { |
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debug("hub: disabling port %d ", port + 1); |
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usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE); } |
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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) { ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); unsigned short portstatus; unsigned short portchange; struct usb_device *dev; struct usb_hub_device *hub; int ret = 0; int i; dev = usb_scan->dev; hub = usb_scan->hub; i = usb_scan->port; /* * Don't talk to the device before the query delay is expired. * This is needed for voltages to stabalize. */ if (get_timer(0) < hub->query_delay) return 0; ret = usb_get_port_status(dev, i + 1, portsts); if (ret < 0) { debug("get_port_status failed "); if (get_timer(0) >= hub->connect_timeout) { debug("devnum=%d port=%d: timeout ", dev->devnum, i + 1); /* Remove this device from scanning list */ list_del(&usb_scan->list); free(usb_scan); return 0; } |
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return 0; |
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} portstatus = le16_to_cpu(portsts->wPortStatus); portchange = le16_to_cpu(portsts->wPortChange); debug("Port %d Status %X Change %X ", i + 1, portstatus, portchange); |
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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) && !(portstatus & USB_PORT_STAT_CONNECTION)) { |
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if (get_timer(0) >= hub->connect_timeout) { debug("devnum=%d port=%d: timeout ", dev->devnum, i + 1); /* Remove this device from scanning list */ list_del(&usb_scan->list); free(usb_scan); return 0; } return 0; } |
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if (portchange & USB_PORT_STAT_C_RESET) { debug("port %d reset change ", i + 1); usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET); } |
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if ((portchange & USB_SS_PORT_STAT_C_BH_RESET) && usb_hub_is_superspeed(dev)) { debug("port %d BH reset change ", i + 1); usb_clear_port_feature(dev, i + 1, USB_SS_PORT_FEAT_C_BH_RESET); } |
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/* A new USB device is ready at this point */ debug("devnum=%d port=%d: USB dev found ", 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 ", 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... ", i + 1); usb_hub_port_connect_change(dev, i); } #endif } if (portstatus & USB_PORT_STAT_SUSPEND) { debug("port %d suspend change ", 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 ", 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 */ |
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printf("Port %d over-current occurred %d times ", i + 1, |
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hub->overcurrent_count[i]); } |
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/* * 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; } |
23faf2bc9
|
601 |
|
dfa96e067
|
602 603 604 |
static struct usb_hub_device *usb_get_hub_device(struct usb_device *dev) { struct usb_hub_device *hub; |
fd09c205f
|
605 |
#if !CONFIG_IS_ENABLED(DM_USB) |
dfa96e067
|
606 607 608 609 610 611 612 613 |
/* "allocate" Hub device */ hub = usb_hub_allocate(); #else hub = dev_get_uclass_priv(dev->dev); #endif return hub; } |
23faf2bc9
|
614 615 |
static int usb_hub_configure(struct usb_device *dev) { |
eaf3e613e
|
616 |
int i, length; |
f57661394
|
617 618 |
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ); unsigned char *bitmap; |
93ad908c4
|
619 |
short hubCharacteristics; |
23faf2bc9
|
620 621 |
struct usb_hub_descriptor *descriptor; struct usb_hub_device *hub; |
0ad0458c7
|
622 |
struct usb_hub_status *hubsts; |
361ad6afc
|
623 |
int ret; |
23faf2bc9
|
624 |
|
dfa96e067
|
625 |
hub = usb_get_hub_device(dev); |
23faf2bc9
|
626 |
if (hub == NULL) |
361ad6afc
|
627 |
return -ENOMEM; |
23faf2bc9
|
628 |
hub->pusb_dev = dev; |
dfa96e067
|
629 |
|
23faf2bc9
|
630 |
/* Get the the hub descriptor */ |
361ad6afc
|
631 632 |
ret = usb_get_hub_descriptor(dev, buffer, 4); if (ret < 0) { |
ceb4972a8
|
633 634 635 |
debug("usb_hub_configure: failed to get hub " \ "descriptor, giving up %lX ", dev->status); |
361ad6afc
|
636 |
return ret; |
23faf2bc9
|
637 638 |
} descriptor = (struct usb_hub_descriptor *)buffer; |
b41411954
|
639 640 |
length = min_t(int, descriptor->bLength, sizeof(struct usb_hub_descriptor)); |
23faf2bc9
|
641 |
|
361ad6afc
|
642 643 |
ret = usb_get_hub_descriptor(dev, buffer, length); if (ret < 0) { |
ceb4972a8
|
644 645 646 |
debug("usb_hub_configure: failed to get hub " \ "descriptor 2nd giving up %lX ", dev->status); |
361ad6afc
|
647 |
return ret; |
23faf2bc9
|
648 |
} |
eaf3e613e
|
649 |
memcpy((unsigned char *)&hub->desc, buffer, length); |
23faf2bc9
|
650 |
/* adjust 16bit values */ |
93ad908c4
|
651 652 653 |
put_unaligned(le16_to_cpu(get_unaligned( &descriptor->wHubCharacteristics)), &hub->desc.wHubCharacteristics); |
23faf2bc9
|
654 |
/* set the bitmap */ |
337fc7e66
|
655 |
bitmap = (unsigned char *)&hub->desc.u.hs.DeviceRemovable[0]; |
23faf2bc9
|
656 657 |
/* devices not removable by default */ memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); |
337fc7e66
|
658 |
bitmap = (unsigned char *)&hub->desc.u.hs.PortPowerCtrlMask[0]; |
23faf2bc9
|
659 660 661 |
memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */ for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++) |
337fc7e66
|
662 663 |
hub->desc.u.hs.DeviceRemovable[i] = descriptor->u.hs.DeviceRemovable[i]; |
23faf2bc9
|
664 665 |
for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++) |
337fc7e66
|
666 667 |
hub->desc.u.hs.PortPowerCtrlMask[i] = descriptor->u.hs.PortPowerCtrlMask[i]; |
23faf2bc9
|
668 669 |
dev->maxchild = descriptor->bNbrPorts; |
ceb4972a8
|
670 671 |
debug("%d ports detected ", dev->maxchild); |
23faf2bc9
|
672 |
|
93ad908c4
|
673 674 |
hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics); switch (hubCharacteristics & HUB_CHAR_LPSM) { |
23faf2bc9
|
675 |
case 0x00: |
ceb4972a8
|
676 677 |
debug("ganged power switching "); |
23faf2bc9
|
678 679 |
break; case 0x01: |
ceb4972a8
|
680 681 |
debug("individual port power switching "); |
23faf2bc9
|
682 683 684 |
break; case 0x02: case 0x03: |
ceb4972a8
|
685 686 |
debug("unknown reserved power switching mode "); |
23faf2bc9
|
687 688 |
break; } |
93ad908c4
|
689 |
if (hubCharacteristics & HUB_CHAR_COMPOUND) |
ceb4972a8
|
690 691 |
debug("part of a compound device "); |
23faf2bc9
|
692 |
else |
ceb4972a8
|
693 694 |
debug("standalone hub "); |
23faf2bc9
|
695 |
|
93ad908c4
|
696 |
switch (hubCharacteristics & HUB_CHAR_OCPM) { |
23faf2bc9
|
697 |
case 0x00: |
ceb4972a8
|
698 699 |
debug("global over-current protection "); |
23faf2bc9
|
700 701 |
break; case 0x08: |
ceb4972a8
|
702 703 |
debug("individual port over-current protection "); |
23faf2bc9
|
704 705 706 |
break; case 0x10: case 0x18: |
ceb4972a8
|
707 708 |
debug("no over-current protection "); |
23faf2bc9
|
709 710 |
break; } |
5624dfd5a
|
711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 |
switch (dev->descriptor.bDeviceProtocol) { case USB_HUB_PR_FS: break; case USB_HUB_PR_HS_SINGLE_TT: debug("Single TT "); break; case USB_HUB_PR_HS_MULTI_TT: ret = usb_set_interface(dev, 0, 1); if (ret == 0) { debug("TT per port "); hub->tt.multi = true; } else { debug("Using single TT (err %d) ", ret); } break; case USB_HUB_PR_SS: /* USB 3.0 hubs don't have a TT */ break; default: debug("Unrecognized hub protocol %d ", 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) ", 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) ", 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) ", 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) ", 32, hub->tt.think_time); break; } |
ceb4972a8
|
768 769 770 771 772 773 |
debug("power on to power good time: %dms ", descriptor->bPwrOn2PwrGood * 2); debug("hub controller current requirement: %dmA ", descriptor->bHubContrCurrent); |
23faf2bc9
|
774 775 |
for (i = 0; i < dev->maxchild; i++) |
ceb4972a8
|
776 777 |
debug("port %d is%s removable ", i + 1, |
337fc7e66
|
778 |
hub->desc.u.hs.DeviceRemovable[(i + 1) / 8] & \ |
ceb4972a8
|
779 |
(1 << ((i + 1) % 8)) ? " not" : ""); |
23faf2bc9
|
780 781 |
if (sizeof(struct usb_hub_status) > USB_BUFSIZ) { |
ceb4972a8
|
782 783 784 |
debug("usb_hub_configure: failed to get Status - " \ "too long: %d ", descriptor->bLength); |
361ad6afc
|
785 |
return -EFBIG; |
23faf2bc9
|
786 |
} |
361ad6afc
|
787 788 |
ret = usb_get_hub_status(dev, buffer); if (ret < 0) { |
ceb4972a8
|
789 790 791 |
debug("usb_hub_configure: failed to get Status %lX ", dev->status); |
361ad6afc
|
792 |
return ret; |
23faf2bc9
|
793 |
} |
23faf2bc9
|
794 |
hubsts = (struct usb_hub_status *)buffer; |
ceb4972a8
|
795 796 797 798 799 800 801 802 803 804 805 806 807 |
debug("get_hub_status returned status %X, change %X ", le16_to_cpu(hubsts->wHubStatus), le16_to_cpu(hubsts->wHubChange)); debug("local power source is %s ", (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \ "lost (inactive)" : "good"); debug("%sover-current condition exists ", (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \ "" : "no "); |
bbc6f06c0
|
808 |
|
fd09c205f
|
809 |
#if CONFIG_IS_ENABLED(DM_USB) |
bbc6f06c0
|
810 |
/* |
81060bb1c
|
811 812 813 814 815 816 817 818 819 820 821 822 |
* 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) ", __func__, ret); return ret; } /* |
bbc6f06c0
|
823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 |
* 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 ", 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) ", __func__, dev->status); return ret; } } } #endif |
23faf2bc9
|
863 |
usb_hub_power_on(hub); |
3615a996a
|
864 865 866 867 868 869 |
/* * 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++) |
883946e8e
|
870 |
usb_hub_reset_devices(hub, i + 1); |
3615a996a
|
871 |
|
c998da0d6
|
872 873 874 875 876 877 878 |
/* * 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. */ |
23faf2bc9
|
879 |
for (i = 0; i < dev->maxchild; i++) { |
c998da0d6
|
880 |
struct usb_device_scan *usb_scan; |
b6d7852cf
|
881 |
|
c998da0d6
|
882 883 884 885 886 |
usb_scan = calloc(1, sizeof(*usb_scan)); if (!usb_scan) { printf("Can't allocate memory for USB device! "); return -ENOMEM; |
23faf2bc9
|
887 |
} |
c998da0d6
|
888 889 890 891 892 |
usb_scan->dev = dev; usb_scan->hub = hub; usb_scan->port = i; list_add_tail(&usb_scan->list, &usb_scan_list); } |
23faf2bc9
|
893 |
|
c998da0d6
|
894 895 896 897 |
/* * And now call the scanning code which loops over the generated list */ ret = usb_device_list_scan(); |
23faf2bc9
|
898 |
|
c998da0d6
|
899 |
return ret; |
23faf2bc9
|
900 |
} |
361ad6afc
|
901 |
static int usb_hub_check(struct usb_device *dev, int ifnum) |
23faf2bc9
|
902 903 |
{ struct usb_interface *iface; |
361ad6afc
|
904 |
struct usb_endpoint_descriptor *ep = NULL; |
23faf2bc9
|
905 906 907 908 |
iface = &dev->config.if_desc[ifnum]; /* Is it a hub? */ if (iface->desc.bInterfaceClass != USB_CLASS_HUB) |
361ad6afc
|
909 |
goto err; |
23faf2bc9
|
910 911 912 913 |
/* 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)) |
361ad6afc
|
914 |
goto err; |
23faf2bc9
|
915 916 |
/* Multiple endpoints? What kind of mutant ninja-hub is this? */ if (iface->desc.bNumEndpoints != 1) |
361ad6afc
|
917 |
goto err; |
23faf2bc9
|
918 919 920 |
ep = &iface->ep_desc[0]; /* Output endpoint? Curiousier and curiousier.. */ if (!(ep->bEndpointAddress & USB_DIR_IN)) |
361ad6afc
|
921 |
goto err; |
23faf2bc9
|
922 923 |
/* If it's not an interrupt endpoint, we'd better punt! */ if ((ep->bmAttributes & 3) != 3) |
361ad6afc
|
924 |
goto err; |
23faf2bc9
|
925 |
/* We found a hub */ |
ceb4972a8
|
926 927 |
debug("USB hub found "); |
361ad6afc
|
928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 |
return 0; err: debug("USB hub not found: bInterfaceClass=%d, bInterfaceSubClass=%d, bNumEndpoints=%d ", 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; |
23faf2bc9
|
950 951 952 |
ret = usb_hub_configure(dev); return ret; } |
054fe48eb
|
953 |
|
fd09c205f
|
954 |
#if CONFIG_IS_ENABLED(DM_USB) |
054fe48eb
|
955 956 |
int usb_hub_scan(struct udevice *hub) { |
bcbe3d157
|
957 |
struct usb_device *udev = dev_get_parent_priv(hub); |
054fe48eb
|
958 959 960 |
return usb_hub_configure(udev); } |
054fe48eb
|
961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 |
static int usb_hub_post_probe(struct udevice *dev) { debug("%s ", __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", |
911954859
|
983 |
.post_bind = dm_scan_fdt_dev, |
054fe48eb
|
984 985 986 987 |
.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), |
dfa96e067
|
988 |
.per_device_auto_alloc_size = sizeof(struct usb_hub_device), |
054fe48eb
|
989 990 991 992 993 994 995 996 997 |
}; static const struct usb_device_id hub_id_table[] = { { .match_flags = USB_DEVICE_ID_MATCH_DEV_CLASS, .bDeviceClass = USB_CLASS_HUB }, { } /* Terminating entry */ }; |
abb59cffc
|
998 |
U_BOOT_USB_DEVICE(usb_generic_hub, hub_id_table); |
054fe48eb
|
999 1000 |
#endif |