// SPDX-License-Identifier: GPL-2.0+/* * (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 * (C) Copyright Randy Dunlap 2000 * (C) Copyright David Brownell 2000-2002 */ #include <linux/bcd.h>#include <linux/module.h>#include <linux/version.h>#include <linux/kernel.h>#include <linux/sched/task_stack.h>#include <linux/slab.h>#include <linux/completion.h>#include <linux/utsname.h>#include <linux/mm.h>#include <asm/io.h>#include <linux/device.h>#include <linux/dma-mapping.h>#include <linux/mutex.h>#include <asm/irq.h>#include <asm/byteorder.h>#include <linux/unaligned.h>#include <linux/platform_device.h>#include <linux/workqueue.h>#include <linux/pm_runtime.h>#include <linux/types.h>#include <linux/genalloc.h>#include <linux/io.h>#include <linux/kcov.h> #include <linux/phy/phy.h>#include <linux/usb.h>#include <linux/usb/hcd.h>#include <linux/usb/otg.h> #include "usb.h"#include "phy.h" /*-------------------------------------------------------------------------*/ /* * USB Host Controller Driver framework * * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing * HCD-specific behaviors/bugs. * * This does error checks, tracks devices and urbs, and delegates to a * "hc_driver" only for code (and data) that really needs to know about * hardware differences. That includes root hub registers, i/o queues, * and so on ... but as little else as possible. * * Shared code includes most of the "root hub" code (these are emulated, * though each HC's hardware works differently) and PCI glue, plus request * tracking overhead. The HCD code should only block on spinlocks or on * hardware handshaking; blocking on software events (such as other kernel * threads releasing resources, or completing actions) is all generic. * * Happens the USB 2.0 spec says this would be invisible inside the "USBD", * and includes mostly a "HCDI" (HCD Interface) along with some APIs used * only by the hub driver ... and that neither should be seen or used by * usb client device drivers. * * Contributors of ideas or unattributed patches include: David Brownell, * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... * * HISTORY: * 2002-02-21 Pull in most of the usb_bus support from usb.c; some * associated cleanup. "usb_hcd" still != "usb_bus". * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. */ /*-------------------------------------------------------------------------*/ /* host controllers we manage */DEFINE_IDR (usb_bus_idr);EXPORT_SYMBOL_GPL (usb_bus_idr); /* used when allocating bus numbers */#define USB_MAXBUS 64 /* used when updating list of hcds */DEFINE_MUTEX(usb_bus_idr_lock); /* exported only for usbfs */EXPORT_SYMBOL_GPL (usb_bus_idr_lock); /* used for controlling access to virtual root hubs */static DEFINE_SPINLOCK(hcd_root_hub_lock); /* used when updating an endpoint's URB list */static DEFINE_SPINLOCK(hcd_urb_list_lock); /* used to protect against unlinking URBs after the device is gone */static DEFINE_SPINLOCK(hcd_urb_unlink_lock); /* wait queue for synchronous unlinks */DECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); /*-------------------------------------------------------------------------*/ /* * Sharable chunks of root hub code. */ /*-------------------------------------------------------------------------*/#define KERNEL_REL bin2bcd(LINUX_VERSION_MAJOR)#define KERNEL_VER bin2bcd(LINUX_VERSION_PATCHLEVEL) /* usb 3.1 root hub device descriptor */static const u8 usb31_rh_dev_descriptor[18] = { 0x12, /* __u8 bLength; */ USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ 0x10, 0x03, /* __le16 bcdUSB; v3.1 */ 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 0x00, /* __u8 bDeviceSubClass; */ 0x03, /* __u8 bDeviceProtocol; USB 3 hub */ 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 0x03, /* __u8 iManufacturer; */ 0x02, /* __u8 iProduct; */ 0x01, /* __u8 iSerialNumber; */ 0x01 /* __u8 bNumConfigurations; */}; /* usb 3.0 root hub device descriptor */static const u8 usb3_rh_dev_descriptor[18] = { 0x12, /* __u8 bLength; */ USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 0x00, /* __u8 bDeviceSubClass; */ 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 0x03, /* __u8 iManufacturer; */ 0x02, /* __u8 iProduct; */ 0x01, /* __u8 iSerialNumber; */ 0x01 /* __u8 bNumConfigurations; */}; /* usb 2.0 root hub device descriptor */static const u8 usb2_rh_dev_descriptor[18] = { 0x12, /* __u8 bLength; */ USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 0x00, /* __u8 bDeviceSubClass; */ 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 0x03, /* __u8 iManufacturer; */ 0x02, /* __u8 iProduct; */ 0x01, /* __u8 iSerialNumber; */ 0x01 /* __u8 bNumConfigurations; */}; /* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ /* usb 1.1 root hub device descriptor */static const u8 usb11_rh_dev_descriptor[18] = { 0x12, /* __u8 bLength; */ USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 0x00, /* __u8 bDeviceSubClass; */ 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 0x03, /* __u8 iManufacturer; */ 0x02, /* __u8 iProduct; */ 0x01, /* __u8 iSerialNumber; */ 0x01 /* __u8 bNumConfigurations; */}; /*-------------------------------------------------------------------------*/ /* Configuration descriptors for our root hubs */ static const u8 fs_rh_config_descriptor[] = { /* one configuration */ 0x09, /* __u8 bLength; */ USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */ 0x19, 0x00, /* __le16 wTotalLength; */ 0x01, /* __u8 bNumInterfaces; (1) */ 0x01, /* __u8 bConfigurationValue; */ 0x00, /* __u8 iConfiguration; */ 0xc0, /* __u8 bmAttributes; Bit 7: must be set, 6: Self-powered, 5: Remote wakeup, 4..0: resvd */ 0x00, /* __u8 MaxPower; */ /* USB 1.1: * USB 2.0, single TT organization (mandatory): * one interface, protocol 0 * * USB 2.0, multiple TT organization (optional): * two interfaces, protocols 1 (like single TT) * and 2 (multiple TT mode) ... config is * sometimes settable * NOT IMPLEMENTED */ /* one interface */ 0x09, /* __u8 if_bLength; */ USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */ 0x00, /* __u8 if_bInterfaceNumber; */ 0x00, /* __u8 if_bAlternateSetting; */ 0x01, /* __u8 if_bNumEndpoints; */ 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 0x00, /* __u8 if_bInterfaceSubClass; */ 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 0x00, /* __u8 if_iInterface; */ /* one endpoint (status change endpoint) */ 0x07, /* __u8 ep_bLength; */ USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */ 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 0x03, /* __u8 ep_bmAttributes; Interrupt */ 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */}; static const u8 hs_rh_config_descriptor[] = { /* one configuration */ 0x09, /* __u8 bLength; */ USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */ 0x19, 0x00, /* __le16 wTotalLength; */ 0x01, /* __u8 bNumInterfaces; (1) */ 0x01, /* __u8 bConfigurationValue; */ 0x00, /* __u8 iConfiguration; */ 0xc0, /* __u8 bmAttributes; Bit 7: must be set, 6: Self-powered, 5: Remote wakeup, 4..0: resvd */ 0x00, /* __u8 MaxPower; */ /* USB 1.1: * USB 2.0, single TT organization (mandatory): * one interface, protocol 0 * * USB 2.0, multiple TT organization (optional): * two interfaces, protocols 1 (like single TT) * and 2 (multiple TT mode) ... config is * sometimes settable * NOT IMPLEMENTED */ /* one interface */ 0x09, /* __u8 if_bLength; */ USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */ 0x00, /* __u8 if_bInterfaceNumber; */ 0x00, /* __u8 if_bAlternateSetting; */ 0x01, /* __u8 if_bNumEndpoints; */ 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 0x00, /* __u8 if_bInterfaceSubClass; */ 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 0x00, /* __u8 if_iInterface; */ /* one endpoint (status change endpoint) */ 0x07, /* __u8 ep_bLength; */ USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */ 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 0x03, /* __u8 ep_bmAttributes; Interrupt */ /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) * see hub.c:hub_configure() for details. */ (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */}; static const u8 ss_rh_config_descriptor[] = { /* one configuration */ 0x09, /* __u8 bLength; */ USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */ 0x1f, 0x00, /* __le16 wTotalLength; */ 0x01, /* __u8 bNumInterfaces; (1) */ 0x01, /* __u8 bConfigurationValue; */ 0x00, /* __u8 iConfiguration; */ 0xc0, /* __u8 bmAttributes; Bit 7: must be set, 6: Self-powered, 5: Remote wakeup, 4..0: resvd */ 0x00, /* __u8 MaxPower; */ /* one interface */ 0x09, /* __u8 if_bLength; */ USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */ 0x00, /* __u8 if_bInterfaceNumber; */ 0x00, /* __u8 if_bAlternateSetting; */ 0x01, /* __u8 if_bNumEndpoints; */ 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 0x00, /* __u8 if_bInterfaceSubClass; */ 0x00, /* __u8 if_bInterfaceProtocol; */ 0x00, /* __u8 if_iInterface; */ /* one endpoint (status change endpoint) */ 0x07, /* __u8 ep_bLength; */ USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */ 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 0x03, /* __u8 ep_bmAttributes; Interrupt */ 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 2 bytes per USB3 10.15.1 */ 0x0c, /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ /* one SuperSpeed endpoint companion descriptor */ 0x06, /* __u8 ss_bLength */ USB_DT_SS_ENDPOINT_COMP, /* __u8 ss_bDescriptorType; SuperSpeed EP */ /* Companion */ 0x00, /* __u8 ss_bMaxBurst; allows 1 TX between ACKs */ 0x00, /* __u8 ss_bmAttributes; 1 packet per service interval */ 0x02, 0x00 /* __le16 ss_wBytesPerInterval; 15 bits for max 15 ports */}; /* authorized_default behaviour: * -1 is authorized for all devices (leftover from wireless USB) * 0 is unauthorized for all devices * 1 is authorized for all devices * 2 is authorized for internal devices */#define USB_AUTHORIZE_WIRED -1#define USB_AUTHORIZE_NONE 0#define USB_AUTHORIZE_ALL 1#define USB_AUTHORIZE_INTERNAL 2 static int authorized_default = CONFIG_USB_DEFAULT_AUTHORIZATION_MODE;module_param(authorized_default, int, S_IRUGO|S_IWUSR);MODULE_PARM_DESC(authorized_default, "Default USB device authorization: 0 is not authorized, 1 is authorized (default), 2 is authorized for internal devices, -1 is authorized (same as 1)");/*-------------------------------------------------------------------------*/ /** * ascii2desc() - Helper routine for producing UTF-16LE string descriptors * @s: Null-terminated ASCII (actually ISO-8859-1) string * @buf: Buffer for USB string descriptor (header + UTF-16LE) * @len: Length (in bytes; may be odd) of descriptor buffer. * * Return: The number of bytes filled in: 2 + 2*strlen(s) or @len, * whichever is less. * * Note: * USB String descriptors can contain at most 126 characters; input * strings longer than that are truncated. */static unsignedascii2desc(char const *s, u8 *buf, unsigned len){ unsigned n, t = 2 + 2*strlen(s); if (t > 254) t = 254; /* Longest possible UTF string descriptor */ if (len > t) len = t; t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ n = len; while (n--) { *buf++ = t; if (!n--) break; *buf++ = t >> 8; t = (unsigned char)*s++; } return len;} /** * rh_string() - provides string descriptors for root hub * @id: the string ID number (0: langids, 1: serial #, 2: product, 3: vendor) * @hcd: the host controller for this root hub * @data: buffer for output packet * @len: length of the provided buffer * * Produces either a manufacturer, product or serial number string for the * virtual root hub device. * * Return: The number of bytes filled in: the length of the descriptor or * of the provided buffer, whichever is less. */static unsignedrh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len){ char buf[160]; char const *s; static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; /* language ids */ switch (id) { case 0: /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ if (len > 4) len = 4; memcpy(data, langids, len); return len; case 1: /* Serial number */ s = hcd->self.bus_name; break; case 2: /* Product name */ s = hcd->product_desc; break; case 3: /* Manufacturer */ snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, init_utsname()->release, hcd->driver->description); s = buf; break; default: /* Can't happen; caller guarantees it */ return 0; } return ascii2desc(s, data, len);} /* Root hub control transfers execute synchronously */static int rh_call_control(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags){ struct usb_ctrlrequest *cmd; u16 typeReq, wValue, wIndex, wLength; u8 *ubuf = urb->transfer_buffer; unsigned len = 0; int status; u8 patch_wakeup = 0; u8 patch_protocol = 0; u16 tbuf_size; u8 *tbuf = NULL; const u8 *bufp; might_sleep(); spin_lock_irq(&hcd_root_hub_lock); status = usb_hcd_link_urb_to_ep(hcd, urb); spin_unlock_irq(&hcd_root_hub_lock); if (status) return status; urb->hcpriv = hcd; /* Indicate it's queued */ cmd = (struct usb_ctrlrequest *) urb->setup_packet; typeReq = (cmd->bRequestType << 8) | cmd->bRequest; wValue = le16_to_cpu (cmd->wValue); wIndex = le16_to_cpu (cmd->wIndex); wLength = le16_to_cpu (cmd->wLength); if (wLength > urb->transfer_buffer_length) goto error; /* * tbuf should be at least as big as the * USB hub descriptor. */ tbuf_size = max_t(u16, sizeof(struct usb_hub_descriptor), wLength); tbuf = kzalloc(tbuf_size, mem_flags); if (!tbuf) { status = -ENOMEM; goto err_alloc; } bufp = tbuf; urb->actual_length = 0; switch (typeReq) { /* DEVICE REQUESTS */ /* The root hub's remote wakeup enable bit is implemented usingLines 1–500 of 3194. Load more
// SPDX-License-Identifier: GPL-2.0+ /* * (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 * (C) Copyright Randy Dunlap 2000 * (C) Copyright David Brownell 2000-2002 */ #include <linux/bcd.h> #include <linux/module.h> #include <linux/version.h> #include <linux/kernel.h> #include <linux/sched/task_stack.h> #include <linux/slab.h> #include <linux/completion.h> #include <linux/utsname.h> #include <linux/mm.h> #include <asm/io.h> #include <linux/device.h> #include <linux/dma-mapping.h> #include <linux/mutex.h> #include <asm/irq.h> #include <asm/byteorder.h> #include <linux/unaligned.h> #include <linux/platform_device.h> #include <linux/workqueue.h> #include <linux/pm_runtime.h> #include <linux/types.h> #include <linux/genalloc.h> #include <linux/io.h> #include <linux/kcov.h> #include <linux/phy/phy.h> #include <linux/usb.h> #include <linux/usb/hcd.h> #include <linux/usb/otg.h> #include "usb.h" #include "phy.h" /*-------------------------------------------------------------------------*/ /* * USB Host Controller Driver framework * * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing * HCD-specific behaviors/bugs. * * This does error checks, tracks devices and urbs, and delegates to a * "hc_driver" only for code (and data) that really needs to know about * hardware differences. That includes root hub registers, i/o queues, * and so on ... but as little else as possible. * * Shared code includes most of the "root hub" code (these are emulated, * though each HC's hardware works differently) and PCI glue, plus request * tracking overhead. The HCD code should only block on spinlocks or on * hardware handshaking; blocking on software events (such as other kernel * threads releasing resources, or completing actions) is all generic. * * Happens the USB 2.0 spec says this would be invisible inside the "USBD", * and includes mostly a "HCDI" (HCD Interface) along with some APIs used * only by the hub driver ... and that neither should be seen or used by * usb client device drivers. * * Contributors of ideas or unattributed patches include: David Brownell, * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... * * HISTORY: * 2002-02-21 Pull in most of the usb_bus support from usb.c; some * associated cleanup. "usb_hcd" still != "usb_bus". * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. */ /*-------------------------------------------------------------------------*/ /* host controllers we manage */ DEFINE_IDR (usb_bus_idr); EXPORT_SYMBOL_GPL (usb_bus_idr); /* used when allocating bus numbers */ #define USB_MAXBUS 64 /* used when updating list of hcds */ DEFINE_MUTEX(usb_bus_idr_lock); /* exported only for usbfs */ EXPORT_SYMBOL_GPL (usb_bus_idr_lock); /* used for controlling access to virtual root hubs */ static DEFINE_SPINLOCK(hcd_root_hub_lock); /* used when updating an endpoint's URB list */ static DEFINE_SPINLOCK(hcd_urb_list_lock); /* used to protect against unlinking URBs after the device is gone */ static DEFINE_SPINLOCK(hcd_urb_unlink_lock); /* wait queue for synchronous unlinks */ DECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); /*-------------------------------------------------------------------------*/ /* * Sharable chunks of root hub code. */ /*-------------------------------------------------------------------------*/ #define KERNEL_REL bin2bcd(LINUX_VERSION_MAJOR) #define KERNEL_VER bin2bcd(LINUX_VERSION_PATCHLEVEL) /* usb 3.1 root hub device descriptor */ static const u8 usb31_rh_dev_descriptor[18] = { 0x12, /* __u8 bLength; */ USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ 0x10, 0x03, /* __le16 bcdUSB; v3.1 */ 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 0x00, /* __u8 bDeviceSubClass; */ 0x03, /* __u8 bDeviceProtocol; USB 3 hub */ 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 0x03, /* __u8 iManufacturer; */ 0x02, /* __u8 iProduct; */ 0x01, /* __u8 iSerialNumber; */ 0x01 /* __u8 bNumConfigurations; */ }; /* usb 3.0 root hub device descriptor */ static const u8 usb3_rh_dev_descriptor[18] = { 0x12, /* __u8 bLength; */ USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 0x00, /* __u8 bDeviceSubClass; */ 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 0x03, /* __u8 iManufacturer; */ 0x02, /* __u8 iProduct; */ 0x01, /* __u8 iSerialNumber; */ 0x01 /* __u8 bNumConfigurations; */ }; /* usb 2.0 root hub device descriptor */ static const u8 usb2_rh_dev_descriptor[18] = { 0x12, /* __u8 bLength; */ USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 0x00, /* __u8 bDeviceSubClass; */ 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 0x03, /* __u8 iManufacturer; */ 0x02, /* __u8 iProduct; */ 0x01, /* __u8 iSerialNumber; */ 0x01 /* __u8 bNumConfigurations; */ }; /* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ /* usb 1.1 root hub device descriptor */ static const u8 usb11_rh_dev_descriptor[18] = { 0x12, /* __u8 bLength; */ USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 0x00, /* __u8 bDeviceSubClass; */ 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 0x03, /* __u8 iManufacturer; */ 0x02, /* __u8 iProduct; */ 0x01, /* __u8 iSerialNumber; */ 0x01 /* __u8 bNumConfigurations; */ }; /*-------------------------------------------------------------------------*/ /* Configuration descriptors for our root hubs */ static const u8 fs_rh_config_descriptor[] = { /* one configuration */ 0x09, /* __u8 bLength; */ USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */ 0x19, 0x00, /* __le16 wTotalLength; */ 0x01, /* __u8 bNumInterfaces; (1) */ 0x01, /* __u8 bConfigurationValue; */ 0x00, /* __u8 iConfiguration; */ 0xc0, /* __u8 bmAttributes; Bit 7: must be set, 6: Self-powered, 5: Remote wakeup, 4..0: resvd */ 0x00, /* __u8 MaxPower; */ /* USB 1.1: * USB 2.0, single TT organization (mandatory): * one interface, protocol 0 * * USB 2.0, multiple TT organization (optional): * two interfaces, protocols 1 (like single TT) * and 2 (multiple TT mode) ... config is * sometimes settable * NOT IMPLEMENTED */ /* one interface */ 0x09, /* __u8 if_bLength; */ USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */ 0x00, /* __u8 if_bInterfaceNumber; */ 0x00, /* __u8 if_bAlternateSetting; */ 0x01, /* __u8 if_bNumEndpoints; */ 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 0x00, /* __u8 if_bInterfaceSubClass; */ 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 0x00, /* __u8 if_iInterface; */ /* one endpoint (status change endpoint) */ 0x07, /* __u8 ep_bLength; */ USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */ 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 0x03, /* __u8 ep_bmAttributes; Interrupt */ 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ }; static const u8 hs_rh_config_descriptor[] = { /* one configuration */ 0x09, /* __u8 bLength; */ USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */ 0x19, 0x00, /* __le16 wTotalLength; */ 0x01, /* __u8 bNumInterfaces; (1) */ 0x01, /* __u8 bConfigurationValue; */ 0x00, /* __u8 iConfiguration; */ 0xc0, /* __u8 bmAttributes; Bit 7: must be set, 6: Self-powered, 5: Remote wakeup, 4..0: resvd */ 0x00, /* __u8 MaxPower; */ /* USB 1.1: * USB 2.0, single TT organization (mandatory): * one interface, protocol 0 * * USB 2.0, multiple TT organization (optional): * two interfaces, protocols 1 (like single TT) * and 2 (multiple TT mode) ... config is * sometimes settable * NOT IMPLEMENTED */ /* one interface */ 0x09, /* __u8 if_bLength; */ USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */ 0x00, /* __u8 if_bInterfaceNumber; */ 0x00, /* __u8 if_bAlternateSetting; */ 0x01, /* __u8 if_bNumEndpoints; */ 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 0x00, /* __u8 if_bInterfaceSubClass; */ 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 0x00, /* __u8 if_iInterface; */ /* one endpoint (status change endpoint) */ 0x07, /* __u8 ep_bLength; */ USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */ 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 0x03, /* __u8 ep_bmAttributes; Interrupt */ /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) * see hub.c:hub_configure() for details. */ (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ }; static const u8 ss_rh_config_descriptor[] = { /* one configuration */ 0x09, /* __u8 bLength; */ USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */ 0x1f, 0x00, /* __le16 wTotalLength; */ 0x01, /* __u8 bNumInterfaces; (1) */ 0x01, /* __u8 bConfigurationValue; */ 0x00, /* __u8 iConfiguration; */ 0xc0, /* __u8 bmAttributes; Bit 7: must be set, 6: Self-powered, 5: Remote wakeup, 4..0: resvd */ 0x00, /* __u8 MaxPower; */ /* one interface */ 0x09, /* __u8 if_bLength; */ USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */ 0x00, /* __u8 if_bInterfaceNumber; */ 0x00, /* __u8 if_bAlternateSetting; */ 0x01, /* __u8 if_bNumEndpoints; */ 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 0x00, /* __u8 if_bInterfaceSubClass; */ 0x00, /* __u8 if_bInterfaceProtocol; */ 0x00, /* __u8 if_iInterface; */ /* one endpoint (status change endpoint) */ 0x07, /* __u8 ep_bLength; */ USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */ 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 0x03, /* __u8 ep_bmAttributes; Interrupt */ 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 2 bytes per USB3 10.15.1 */ 0x0c, /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ /* one SuperSpeed endpoint companion descriptor */ 0x06, /* __u8 ss_bLength */ USB_DT_SS_ENDPOINT_COMP, /* __u8 ss_bDescriptorType; SuperSpeed EP */ /* Companion */ 0x00, /* __u8 ss_bMaxBurst; allows 1 TX between ACKs */ 0x00, /* __u8 ss_bmAttributes; 1 packet per service interval */ 0x02, 0x00 /* __le16 ss_wBytesPerInterval; 15 bits for max 15 ports */ }; /* authorized_default behaviour: * -1 is authorized for all devices (leftover from wireless USB) * 0 is unauthorized for all devices * 1 is authorized for all devices * 2 is authorized for internal devices */ #define USB_AUTHORIZE_WIRED -1 #define USB_AUTHORIZE_NONE 0 #define USB_AUTHORIZE_ALL 1 #define USB_AUTHORIZE_INTERNAL 2 static int authorized_default = CONFIG_USB_DEFAULT_AUTHORIZATION_MODE; module_param(authorized_default, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(authorized_default, "Default USB device authorization: 0 is not authorized, 1 is authorized (default), 2 is authorized for internal devices, -1 is authorized (same as 1)"); /*-------------------------------------------------------------------------*/ /** * ascii2desc() - Helper routine for producing UTF-16LE string descriptors * @s: Null-terminated ASCII (actually ISO-8859-1) string * @buf: Buffer for USB string descriptor (header + UTF-16LE) * @len: Length (in bytes; may be odd) of descriptor buffer. * * Return: The number of bytes filled in: 2 + 2*strlen(s) or @len, * whichever is less. * * Note: * USB String descriptors can contain at most 126 characters; input * strings longer than that are truncated. */ static unsigned ascii2desc(char const *s, u8 *buf, unsigned len) { unsigned n, t = 2 + 2*strlen(s); if (t > 254) t = 254; /* Longest possible UTF string descriptor */ if (len > t) len = t; t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ n = len; while (n--) { *buf++ = t; if (!n--) break; *buf++ = t >> 8; t = (unsigned char)*s++; } return len; } /** * rh_string() - provides string descriptors for root hub * @id: the string ID number (0: langids, 1: serial #, 2: product, 3: vendor) * @hcd: the host controller for this root hub * @data: buffer for output packet * @len: length of the provided buffer * * Produces either a manufacturer, product or serial number string for the * virtual root hub device. * * Return: The number of bytes filled in: the length of the descriptor or * of the provided buffer, whichever is less. */ static unsigned rh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len) { char buf[160]; char const *s; static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; /* language ids */ switch (id) { case 0: /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ if (len > 4) len = 4; memcpy(data, langids, len); return len; case 1: /* Serial number */ s = hcd->self.bus_name; break; case 2: /* Product name */ s = hcd->product_desc; break; case 3: /* Manufacturer */ snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, init_utsname()->release, hcd->driver->description); s = buf; break; default: /* Can't happen; caller guarantees it */ return 0; } return ascii2desc(s, data, len); } /* Root hub control transfers execute synchronously */ static int rh_call_control(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) { struct usb_ctrlrequest *cmd; u16 typeReq, wValue, wIndex, wLength; u8 *ubuf = urb->transfer_buffer; unsigned len = 0; int status; u8 patch_wakeup = 0; u8 patch_protocol = 0; u16 tbuf_size; u8 *tbuf = NULL; const u8 *bufp; might_sleep(); spin_lock_irq(&hcd_root_hub_lock); status = usb_hcd_link_urb_to_ep(hcd, urb); spin_unlock_irq(&hcd_root_hub_lock); if (status) return status; urb->hcpriv = hcd; /* Indicate it's queued */ cmd = (struct usb_ctrlrequest *) urb->setup_packet; typeReq = (cmd->bRequestType << 8) | cmd->bRequest; wValue = le16_to_cpu (cmd->wValue); wIndex = le16_to_cpu (cmd->wIndex); wLength = le16_to_cpu (cmd->wLength); if (wLength > urb->transfer_buffer_length) goto error; /* * tbuf should be at least as big as the * USB hub descriptor. */ tbuf_size = max_t(u16, sizeof(struct usb_hub_descriptor), wLength); tbuf = kzalloc(tbuf_size, mem_flags); if (!tbuf) { status = -ENOMEM; goto err_alloc; } bufp = tbuf; urb->actual_length = 0; switch (typeReq) { /* DEVICE REQUESTS */ /* The root hub's remote wakeup enable bit is implemented using