| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * 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 |
| */ |
| |
| /**************************************************************************** |
| * HUB "Driver" |
| * Probes device for being a hub and configurate it |
| */ |
| |
| #include <common.h> |
| #include <command.h> |
| #include <dm.h> |
| #include <errno.h> |
| #include <memalign.h> |
| #include <asm/processor.h> |
| #include <asm/unaligned.h> |
| #include <linux/ctype.h> |
| #include <linux/list.h> |
| #include <asm/byteorder.h> |
| #ifdef CONFIG_SANDBOX |
| #include <asm/state.h> |
| #endif |
| #include <asm/unaligned.h> |
| |
| #include <usb.h> |
| |
| #define USB_BUFSIZ 512 |
| |
| #define HUB_SHORT_RESET_TIME 20 |
| #define HUB_LONG_RESET_TIME 200 |
| |
| #define PORT_OVERCURRENT_MAX_SCAN_COUNT 3 |
| |
| struct usb_device_scan { |
| struct usb_device *dev; /* USB hub device to scan */ |
| struct usb_hub_device *hub; /* USB hub struct */ |
| int port; /* USB port to scan */ |
| struct list_head list; |
| }; |
| |
| static LIST_HEAD(usb_scan_list); |
| |
| __weak void usb_hub_reset_devices(struct usb_hub_device *hub, int port) |
| { |
| return; |
| } |
| |
| static inline bool usb_hub_is_superspeed(struct usb_device *hdev) |
| { |
| return hdev->descriptor.bDeviceProtocol == 3; |
| } |
| |
| #if CONFIG_IS_ENABLED(DM_USB) |
| bool usb_hub_is_root_hub(struct udevice *hub) |
| { |
| if (device_get_uclass_id(hub->parent) != UCLASS_USB_HUB) |
| return true; |
| |
| return false; |
| } |
| |
| 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); |
| } |
| #endif |
| |
| static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size) |
| { |
| unsigned short dtype = USB_DT_HUB; |
| |
| if (usb_hub_is_superspeed(dev)) |
| dtype = USB_DT_SS_HUB; |
| |
| return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
| USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB, |
| dtype << 8, 0, data, size, USB_CNTL_TIMEOUT); |
| } |
| |
| static int usb_clear_port_feature(struct usb_device *dev, int port, int feature) |
| { |
| return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
| USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, |
| port, NULL, 0, USB_CNTL_TIMEOUT); |
| } |
| |
| static int usb_set_port_feature(struct usb_device *dev, int port, int feature) |
| { |
| return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
| USB_REQ_SET_FEATURE, USB_RT_PORT, feature, |
| port, NULL, 0, USB_CNTL_TIMEOUT); |
| } |
| |
| static int usb_get_hub_status(struct usb_device *dev, void *data) |
| { |
| return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
| USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0, |
| data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT); |
| } |
| |
| int usb_get_port_status(struct usb_device *dev, int port, void *data) |
| { |
| int ret; |
| |
| ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
| USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port, |
| data, sizeof(struct usb_port_status), USB_CNTL_TIMEOUT); |
| |
| #if CONFIG_IS_ENABLED(DM_USB) |
| 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; |
| } |
| |
| |
| static void usb_hub_power_on(struct usb_hub_device *hub) |
| { |
| int i; |
| struct usb_device *dev; |
| unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2; |
| const char *env; |
| |
| dev = hub->pusb_dev; |
| |
| debug("enabling power on all ports\n"); |
| for (i = 0; i < dev->maxchild; i++) { |
| usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER); |
| debug("port %d returns %lX\n", i + 1, dev->status); |
| } |
| |
| #ifdef CONFIG_SANDBOX |
| /* |
| * Don't set timeout / delay values here. This results |
| * in these values still being reset to 0. |
| */ |
| if (state_get_skip_delays()) |
| return; |
| #endif |
| |
| /* |
| * Wait for power to become stable, |
| * plus spec-defined max time for device to connect |
| * but allow this time to be increased via env variable as some |
| * devices break the spec and require longer warm-up times |
| */ |
| env = env_get("usb_pgood_delay"); |
| if (env) |
| pgood_delay = max(pgood_delay, |
| (unsigned)simple_strtol(env, NULL, 0)); |
| debug("pgood_delay=%dms\n", pgood_delay); |
| |
| /* |
| * Do a minimum delay of the larger value of 100ms or pgood_delay |
| * so that the power can stablize before the devices are queried |
| */ |
| hub->query_delay = get_timer(0) + max(100, (int)pgood_delay); |
| |
| /* |
| * Record the power-on timeout here. The max. delay (timeout) |
| * will be done based on this value in the USB port loop in |
| * usb_hub_configure() later. |
| */ |
| hub->connect_timeout = hub->query_delay + 1000; |
| debug("devnum=%d poweron: query_delay=%d connect_timeout=%d\n", |
| dev->devnum, max(100, (int)pgood_delay), |
| max(100, (int)pgood_delay) + 1000); |
| } |
| |
| #if !CONFIG_IS_ENABLED(DM_USB) |
| static struct usb_hub_device hub_dev[USB_MAX_HUB]; |
| static int usb_hub_index; |
| |
| void usb_hub_reset(void) |
| { |
| usb_hub_index = 0; |
| |
| /* Zero out global hub_dev in case its re-used again */ |
| memset(hub_dev, 0, sizeof(hub_dev)); |
| } |
| |
| static struct usb_hub_device *usb_hub_allocate(void) |
| { |
| if (usb_hub_index < USB_MAX_HUB) |
| return &hub_dev[usb_hub_index++]; |
| |
| printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB); |
| return NULL; |
| } |
| #endif |
| |
| #define MAX_TRIES 5 |
| |
| static inline char *portspeed(int portstatus) |
| { |
| char *speed_str; |
| |
| switch (portstatus & USB_PORT_STAT_SPEED_MASK) { |
| case USB_PORT_STAT_SUPER_SPEED: |
| speed_str = "5 Gb/s"; |
| break; |
| case USB_PORT_STAT_HIGH_SPEED: |
| speed_str = "480 Mb/s"; |
| break; |
| case USB_PORT_STAT_LOW_SPEED: |
| speed_str = "1.5 Mb/s"; |
| break; |
| default: |
| speed_str = "12 Mb/s"; |
| break; |
| } |
| |
| return speed_str; |
| } |
| |
| /** |
| * 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 |
| */ |
| int usb_hub_port_reset(struct usb_device *dev, int port, |
| unsigned short *portstat) |
| { |
| int err, tries; |
| ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); |
| unsigned short portstatus, portchange; |
| int delay = HUB_LONG_RESET_TIME; /* start with short reset delay */ |
| |
| #if CONFIG_IS_ENABLED(DM_USB) |
| debug("%s: resetting '%s' port %d...\n", __func__, dev->dev->name, |
| port + 1); |
| #else |
| debug("%s: resetting port %d...\n", __func__, port + 1); |
| #endif |
| for (tries = 0; tries < MAX_TRIES; tries++) { |
| err = usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET); |
| if (err < 0) |
| return err; |
| |
| mdelay(delay); |
| |
| if (usb_get_port_status(dev, port + 1, portsts) < 0) { |
| debug("get_port_status failed status %lX\n", |
| dev->status); |
| return -1; |
| } |
| portstatus = le16_to_cpu(portsts->wPortStatus); |
| portchange = le16_to_cpu(portsts->wPortChange); |
| |
| debug("portstatus %x, change %x, %s\n", portstatus, portchange, |
| portspeed(portstatus)); |
| |
| debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \ |
| " USB_PORT_STAT_ENABLE %d\n", |
| (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0, |
| (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0, |
| (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0); |
| |
| /* |
| * Perhaps we should check for the following here: |
| * - C_CONNECTION hasn't been set. |
| * - CONNECTION is still set. |
| * |
| * Doing so would ensure that the device is still connected |
| * to the bus, and hasn't been unplugged or replaced while the |
| * USB bus reset was going on. |
| * |
| * However, if we do that, then (at least) a San Disk Ultra |
| * USB 3.0 16GB device fails to reset on (at least) an NVIDIA |
| * Tegra Jetson TK1 board. For some reason, the device appears |
| * to briefly drop off the bus when this second bus reset is |
| * executed, yet if we retry this loop, it'll eventually come |
| * back after another reset or two. |
| */ |
| |
| if (portstatus & USB_PORT_STAT_ENABLE) |
| break; |
| |
| /* Switch to long reset delay for the next round */ |
| delay = HUB_LONG_RESET_TIME; |
| } |
| |
| if (tries == MAX_TRIES) { |
| debug("Cannot enable port %i after %i retries, " \ |
| "disabling port.\n", port + 1, MAX_TRIES); |
| debug("Maybe the USB cable is bad?\n"); |
| return -1; |
| } |
| |
| usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET); |
| *portstat = portstatus; |
| return 0; |
| } |
| |
| int usb_hub_port_connect_change(struct usb_device *dev, int port) |
| { |
| ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); |
| unsigned short portstatus; |
| int ret, speed; |
| |
| /* Check status */ |
| ret = usb_get_port_status(dev, port + 1, portsts); |
| if (ret < 0) { |
| debug("get_port_status failed\n"); |
| return ret; |
| } |
| |
| portstatus = le16_to_cpu(portsts->wPortStatus); |
| debug("portstatus %x, change %x, %s\n", |
| portstatus, |
| le16_to_cpu(portsts->wPortChange), |
| portspeed(portstatus)); |
| |
| /* Clear the connection change status */ |
| usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION); |
| |
| /* Disconnect any existing devices under this port */ |
| if (((!(portstatus & USB_PORT_STAT_CONNECTION)) && |
| (!(portstatus & USB_PORT_STAT_ENABLE))) || |
| usb_device_has_child_on_port(dev, port)) { |
| debug("usb_disconnect(&hub->children[port]);\n"); |
| /* Return now if nothing is connected */ |
| if (!(portstatus & USB_PORT_STAT_CONNECTION)) |
| return -ENOTCONN; |
| } |
| |
| /* Reset the port */ |
| mdelay(200); |
| ret = usb_hub_port_reset(dev, port, &portstatus); |
| mdelay(500); |
| if (ret < 0) { |
| if (ret != -ENXIO) |
| printf("cannot reset port %i!?\n", port + 1); |
| return ret; |
| } |
| |
| switch (portstatus & USB_PORT_STAT_SPEED_MASK) { |
| case USB_PORT_STAT_SUPER_SPEED: |
| speed = USB_SPEED_SUPER; |
| break; |
| case USB_PORT_STAT_HIGH_SPEED: |
| speed = USB_SPEED_HIGH; |
| break; |
| case USB_PORT_STAT_LOW_SPEED: |
| speed = USB_SPEED_LOW; |
| break; |
| default: |
| speed = USB_SPEED_FULL; |
| break; |
| } |
| |
| #ifdef CONFIG_USB_DEVICE_V2 |
| #if CONFIG_IS_ENABLED(DM_USB) |
| if (usb_hub_is_root_hub(dev->dev)) { |
| usb_tuning_port(dev, port); |
| mdelay(10); |
| } |
| #endif |
| #endif |
| |
| #if CONFIG_IS_ENABLED(DM_USB) |
| struct udevice *child; |
| |
| ret = usb_scan_device(dev->dev, port + 1, speed, &child); |
| #else |
| struct usb_device *usb; |
| |
| ret = usb_alloc_new_device(dev->controller, &usb); |
| if (ret) { |
| printf("cannot create new device: ret=%d", ret); |
| return ret; |
| } |
| |
| dev->children[port] = usb; |
| usb->speed = speed; |
| usb->parent = dev; |
| usb->portnr = port + 1; |
| /* Run it through the hoops (find a driver, etc) */ |
| ret = usb_new_device(usb); |
| if (ret < 0) { |
| /* Woops, disable the port */ |
| usb_free_device(dev->controller); |
| dev->children[port] = NULL; |
| } |
| #endif |
| if (ret < 0) { |
| debug("hub: disabling port %d\n", port + 1); |
| usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE); |
| } |
| |
| return ret; |
| } |
| |
| static int usb_scan_port(struct usb_device_scan *usb_scan) |
| { |
| ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); |
| unsigned short portstatus; |
| unsigned short portchange; |
| struct usb_device *dev; |
| struct usb_hub_device *hub; |
| int ret = 0; |
| int i; |
| |
| dev = usb_scan->dev; |
| hub = usb_scan->hub; |
| i = usb_scan->port; |
| |
| /* |
| * Don't talk to the device before the query delay is expired. |
| * This is needed for voltages to stabalize. |
| */ |
| if (get_timer(0) < hub->query_delay) |
| return 0; |
| |
| ret = usb_get_port_status(dev, i + 1, portsts); |
| if (ret < 0) { |
| debug("get_port_status failed\n"); |
| if (get_timer(0) >= hub->connect_timeout) { |
| debug("devnum=%d port=%d: timeout\n", |
| dev->devnum, i + 1); |
| /* Remove this device from scanning list */ |
| list_del(&usb_scan->list); |
| free(usb_scan); |
| return 0; |
| } |
| return 0; |
| } |
| |
| portstatus = le16_to_cpu(portsts->wPortStatus); |
| portchange = le16_to_cpu(portsts->wPortChange); |
| debug("Port %d Status %X Change %X\n", i + 1, portstatus, portchange); |
| |
| /* |
| * No connection change happened, wait a bit more. |
| * |
| * 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)) { |
| if (get_timer(0) >= hub->connect_timeout) { |
| debug("devnum=%d port=%d: timeout\n", |
| dev->devnum, i + 1); |
| /* Remove this device from scanning list */ |
| list_del(&usb_scan->list); |
| free(usb_scan); |
| return 0; |
| } |
| return 0; |
| } |
| |
| 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); |
| } |
| |
| 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; |
| |
| #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 |