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u-boot/include/usb.h
Adam Ford 078dfef931 usb: ehci-mx6: Enable OTG detection on imx8mm and imx8mn 
The imx8mm and imx8mn appear compatible with imx7d-usb
flags in the OTG driver.  If the dr_mode is defined as
host or peripheral, the device appears to operate correctly,
however the auto host/peripheral detection results in an error.

The solution isn't just adding checks for imx8mm and imx8mn to
the check for imx7, because the USB clock needs to be running
to read from the USBNC_PHY_STATUS_OFFSET register or it will hang.

Marek requested that I not enable the clocks in ehci_usb_of_to_plat,
so I modified that function to return an unknown state if the
device tree does not explicitly state whether it is a host
or a peripheral.

When the driver probes, it looks to see if it's in the unknown
state, and only then will it read the register to auto-detect.

Signed-off-by: Adam Ford <aford173@gmail.com>
Tested-by: Tim Harvey <tharvey@gateworks.com>
2022-02-11 00:03:48 +01:00

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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2001
* Denis Peter, MPL AG Switzerland
*
* Adapted for U-Boot driver model
* (C) Copyright 2015 Google, Inc
* Note: Part of this code has been derived from linux
*
*/
#ifndef _USB_H_
#define _USB_H_
#include <fdtdec.h>
#include <usb_defs.h>
#include <linux/usb/ch9.h>
#include <asm/cache.h>
#include <part.h>
/*
* The EHCI spec says that we must align to at least 32 bytes. However,
* some platforms require larger alignment.
*/
#if ARCH_DMA_MINALIGN > 32
#define USB_DMA_MINALIGN ARCH_DMA_MINALIGN
#else
#define USB_DMA_MINALIGN 32
#endif
/* Everything is aribtrary */
#define USB_ALTSETTINGALLOC 4
#define USB_MAXALTSETTING 128 /* Hard limit */
#define USB_MAX_DEVICE 32
#define USB_MAXCONFIG 8
#define USB_MAXINTERFACES 8
#define USB_MAXENDPOINTS 16
#define USB_MAXCHILDREN 8 /* This is arbitrary */
#define USB_MAX_HUB 16
#define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
/*
* This is the timeout to allow for submitting an urb in ms. We allow more
* time for a BULK device to react - some are slow.
*/
#define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)
/* device request (setup) */
struct devrequest {
__u8 requesttype;
__u8 request;
__le16 value;
__le16 index;
__le16 length;
} __attribute__ ((packed));
/* Interface */
struct usb_interface {
struct usb_interface_descriptor desc;
__u8 no_of_ep;
__u8 num_altsetting;
__u8 act_altsetting;
struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
/*
* Super Speed Device will have Super Speed Endpoint
* Companion Descriptor (section 9.6.7 of usb 3.0 spec)
* Revision 1.0 June 6th 2011
*/
struct usb_ss_ep_comp_descriptor ss_ep_comp_desc[USB_MAXENDPOINTS];
} __attribute__ ((packed));
/* Configuration information.. */
struct usb_config {
struct usb_config_descriptor desc;
__u8 no_of_if; /* number of interfaces */
struct usb_interface if_desc[USB_MAXINTERFACES];
} __attribute__ ((packed));
enum {
/* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
PACKET_SIZE_8 = 0,
PACKET_SIZE_16 = 1,
PACKET_SIZE_32 = 2,
PACKET_SIZE_64 = 3,
};
/**
* struct usb_device - information about a USB device
*
* With driver model both UCLASS_USB (the USB controllers) and UCLASS_USB_HUB
* (the hubs) have this as parent data. Hubs are children of controllers or
* other hubs and there is always a single root hub for each controller.
* Therefore struct usb_device can always be accessed with
* dev_get_parent_priv(dev), where dev is a USB device.
*
* Pointers exist for obtaining both the device (could be any uclass) and
* controller (UCLASS_USB) from this structure. The controller does not have
* a struct usb_device since it is not a device.
*/
struct usb_device {
int devnum; /* Device number on USB bus */
enum usb_device_speed speed; /* full/low/high */
char mf[32]; /* manufacturer */
char prod[32]; /* product */
char serial[32]; /* serial number */
/* Maximum packet size; one of: PACKET_SIZE_* */
int maxpacketsize;
/* one bit for each endpoint ([0] = IN, [1] = OUT) */
unsigned int toggle[2];
/* endpoint halts; one bit per endpoint # & direction;
* [0] = IN, [1] = OUT
*/
unsigned int halted[2];
int epmaxpacketin[16]; /* INput endpoint specific maximums */
int epmaxpacketout[16]; /* OUTput endpoint specific maximums */
int configno; /* selected config number */
/* Device Descriptor */
struct usb_device_descriptor descriptor
__attribute__((aligned(ARCH_DMA_MINALIGN)));
struct usb_config config; /* config descriptor */
int have_langid; /* whether string_langid is valid yet */
int string_langid; /* language ID for strings */
int (*irq_handle)(struct usb_device *dev);
unsigned long irq_status;
int irq_act_len; /* transferred bytes */
void *privptr;
/*
* Child devices - if this is a hub device
* Each instance needs its own set of data structures.
*/
unsigned long status;
unsigned long int_pending; /* 1 bit per ep, used by int_queue */
int act_len; /* transferred bytes */
int maxchild; /* Number of ports if hub */
int portnr; /* Port number, 1=first */
#if !CONFIG_IS_ENABLED(DM_USB)
/* parent hub, or NULL if this is the root hub */
struct usb_device *parent;
struct usb_device *children[USB_MAXCHILDREN];
void *controller; /* hardware controller private data */
#endif
/* slot_id - for xHCI enabled devices */
unsigned int slot_id;
#if CONFIG_IS_ENABLED(DM_USB)
struct udevice *dev; /* Pointer to associated device */
struct udevice *controller_dev; /* Pointer to associated controller */
#endif
};
struct int_queue;
/*
* You can initialize platform's USB host or device
* ports by passing this enum as an argument to
* board_usb_init().
*/
enum usb_init_type {
USB_INIT_HOST,
USB_INIT_DEVICE,
USB_INIT_UNKNOWN,
};
/**********************************************************************
* this is how the lowlevel part communicate with the outer world
*/
int usb_lowlevel_init(int index, enum usb_init_type init, void **controller);
int usb_lowlevel_stop(int index);
#if defined(CONFIG_USB_MUSB_HOST) || CONFIG_IS_ENABLED(DM_USB)
int usb_reset_root_port(struct usb_device *dev);
#else
#define usb_reset_root_port(dev)
#endif
int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
void *buffer, int transfer_len);
int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int transfer_len, struct devrequest *setup);
int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int transfer_len, int interval, bool nonblock);
#if defined CONFIG_USB_EHCI_HCD || defined CONFIG_USB_MUSB_HOST \
|| CONFIG_IS_ENABLED(DM_USB)
struct int_queue *create_int_queue(struct usb_device *dev, unsigned long pipe,
int queuesize, int elementsize, void *buffer, int interval);
int destroy_int_queue(struct usb_device *dev, struct int_queue *queue);
void *poll_int_queue(struct usb_device *dev, struct int_queue *queue);
#endif
/* Defines */
#define USB_UHCI_VEND_ID 0x8086
#define USB_UHCI_DEV_ID 0x7112
/*
* PXA25x can only act as USB device. There are drivers
* which works with USB CDC gadgets implementations.
* Some of them have common routines which can be used
* in boards init functions e.g. udc_disconnect() used for
* forced device disconnection from host.
*/
extern void udc_disconnect(void);
/*
* board-specific hardware initialization, called by
* usb drivers and u-boot commands
*
* @param index USB controller number
* @param init initializes controller as USB host or device
*/
int board_usb_init(int index, enum usb_init_type init);
/*
* can be used to clean up after failed USB initialization attempt
* vide: board_usb_init()
*
* @param index USB controller number for selective cleanup
* @param init usb_init_type passed to board_usb_init()
*/
int board_usb_cleanup(int index, enum usb_init_type init);
#ifdef CONFIG_USB_STORAGE
#define USB_MAX_STOR_DEV 7
int usb_stor_scan(int mode);
int usb_stor_info(void);
#endif
#ifdef CONFIG_USB_HOST_ETHER
#define USB_MAX_ETH_DEV 5
int usb_host_eth_scan(int mode);
#endif
#ifdef CONFIG_USB_KEYBOARD
/*
* USB Keyboard reports are 8 bytes in boot protocol.
* Appendix B of HID Device Class Definition 1.11
*/
#define USB_KBD_BOOT_REPORT_SIZE 8
int drv_usb_kbd_init(void);
int usb_kbd_deregister(int force);
#endif
/* routines */
int usb_init(void); /* initialize the USB Controller */
int usb_stop(void); /* stop the USB Controller */
int usb_detect_change(void); /* detect if a USB device has been (un)plugged */
int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
int report_id);
int usb_control_msg(struct usb_device *dev, unsigned int pipe,
unsigned char request, unsigned char requesttype,
unsigned short value, unsigned short index,
void *data, unsigned short size, int timeout);
int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
void *data, int len, int *actual_length, int timeout);
int usb_int_msg(struct usb_device *dev, unsigned long pipe,
void *buffer, int transfer_len, int interval, bool nonblock);
int usb_lock_async(struct usb_device *dev, int lock);
int usb_disable_asynch(int disable);
int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
int usb_get_configuration_no(struct usb_device *dev, int cfgno,
unsigned char *buffer, int length);
int usb_get_configuration_len(struct usb_device *dev, int cfgno);
int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
unsigned char id, void *buf, int size);
int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
unsigned char type, unsigned char id, void *buf,
int size);
int usb_clear_halt(struct usb_device *dev, int pipe);
int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
int usb_set_interface(struct usb_device *dev, int interface, int alternate);
int usb_get_port_status(struct usb_device *dev, int port, void *data);
/* big endian -> little endian conversion */
/* some CPUs are already little endian e.g. the ARM920T */
#define __swap_16(x) \
({ unsigned short x_ = (unsigned short)x; \
(unsigned short)( \
((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
})
#define __swap_32(x) \
({ unsigned long x_ = (unsigned long)x; \
(unsigned long)( \
((x_ & 0x000000FFUL) << 24) | \
((x_ & 0x0000FF00UL) << 8) | \
((x_ & 0x00FF0000UL) >> 8) | \
((x_ & 0xFF000000UL) >> 24)); \
})
#ifdef __LITTLE_ENDIAN
# define swap_16(x) (x)
# define swap_32(x) (x)
#else
# define swap_16(x) __swap_16(x)
# define swap_32(x) __swap_32(x)
#endif
/*
* Calling this entity a "pipe" is glorifying it. A USB pipe
* is something embarrassingly simple: it basically consists
* of the following information:
* - device number (7 bits)
* - endpoint number (4 bits)
* - current Data0/1 state (1 bit)
* - direction (1 bit)
* - speed (2 bits)
* - max packet size (2 bits: 8, 16, 32 or 64)
* - pipe type (2 bits: control, interrupt, bulk, isochronous)
*
* That's 18 bits. Really. Nothing more. And the USB people have
* documented these eighteen bits as some kind of glorious
* virtual data structure.
*
* Let's not fall in that trap. We'll just encode it as a simple
* unsigned int. The encoding is:
*
* - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64)
* - direction: bit 7 (0 = Host-to-Device [Out],
* (1 = Device-to-Host [In])
* - device: bits 8-14
* - endpoint: bits 15-18
* - Data0/1: bit 19
* - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt,
* 10 = control, 11 = bulk)
*
* Why? Because it's arbitrary, and whatever encoding we select is really
* up to us. This one happens to share a lot of bit positions with the UHCI
* specification, so that much of the uhci driver can just mask the bits
* appropriately.
*/
/* Create various pipes... */
#define create_pipe(dev,endpoint) \
(((dev)->devnum << 8) | ((endpoint) << 15) | \
(dev)->maxpacketsize)
#define default_pipe(dev) ((dev)->speed << 26)
#define usb_sndctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
create_pipe(dev, endpoint))
#define usb_rcvctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
create_pipe(dev, endpoint) | \
USB_DIR_IN)
#define usb_sndisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
create_pipe(dev, endpoint))
#define usb_rcvisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
create_pipe(dev, endpoint) | \
USB_DIR_IN)
#define usb_sndbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
create_pipe(dev, endpoint))
#define usb_rcvbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
create_pipe(dev, endpoint) | \
USB_DIR_IN)
#define usb_sndintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
create_pipe(dev, endpoint))
#define usb_rcvintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
create_pipe(dev, endpoint) | \
USB_DIR_IN)
#define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \
default_pipe(dev))
#define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \
default_pipe(dev) | \
USB_DIR_IN)
/* The D0/D1 toggle bits */
#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep))
#define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
((dev)->toggle[out] & \
~(1 << ep)) | ((bit) << ep))
/* Endpoint halt control/status */
#define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1)
#define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
#define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
#define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
#define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
USB_PID_OUT)
#define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1)
#define usb_pipein(pipe) (((pipe) >> 7) & 1)
#define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f)
#define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff)
#define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf)
#define usb_pipedata(pipe) (((pipe) >> 19) & 1)
#define usb_pipetype(pipe) (((pipe) >> 30) & 3)
#define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
#define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT)
#define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
#define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)
#define usb_pipe_ep_index(pipe) \
usb_pipecontrol(pipe) ? (usb_pipeendpoint(pipe) * 2) : \
((usb_pipeendpoint(pipe) * 2) - \
(usb_pipein(pipe) ? 0 : 1))
/**
* struct usb_device_id - identifies USB devices for probing and hotplugging
* @match_flags: Bit mask controlling which of the other fields are used to
* match against new devices. Any field except for driver_info may be
* used, although some only make sense in conjunction with other fields.
* This is usually set by a USB_DEVICE_*() macro, which sets all
* other fields in this structure except for driver_info.
* @idVendor: USB vendor ID for a device; numbers are assigned
* by the USB forum to its members.
* @idProduct: Vendor-assigned product ID.
* @bcdDevice_lo: Low end of range of vendor-assigned product version numbers.
* This is also used to identify individual product versions, for
* a range consisting of a single device.
* @bcdDevice_hi: High end of version number range. The range of product
* versions is inclusive.
* @bDeviceClass: Class of device; numbers are assigned
* by the USB forum. Products may choose to implement classes,
* or be vendor-specific. Device classes specify behavior of all
* the interfaces on a device.
* @bDeviceSubClass: Subclass of device; associated with bDeviceClass.
* @bDeviceProtocol: Protocol of device; associated with bDeviceClass.
* @bInterfaceClass: Class of interface; numbers are assigned
* by the USB forum. Products may choose to implement classes,
* or be vendor-specific. Interface classes specify behavior only
* of a given interface; other interfaces may support other classes.
* @bInterfaceSubClass: Subclass of interface; associated with bInterfaceClass.
* @bInterfaceProtocol: Protocol of interface; associated with bInterfaceClass.
* @bInterfaceNumber: Number of interface; composite devices may use
* fixed interface numbers to differentiate between vendor-specific
* interfaces.
* @driver_info: Holds information used by the driver. Usually it holds
* a pointer to a descriptor understood by the driver, or perhaps
* device flags.
*
* In most cases, drivers will create a table of device IDs by using
* USB_DEVICE(), or similar macros designed for that purpose.
* They will then export it to userspace using MODULE_DEVICE_TABLE(),
* and provide it to the USB core through their usb_driver structure.
*
* See the usb_match_id() function for information about how matches are
* performed. Briefly, you will normally use one of several macros to help
* construct these entries. Each entry you provide will either identify
* one or more specific products, or will identify a class of products
* which have agreed to behave the same. You should put the more specific
* matches towards the beginning of your table, so that driver_info can
* record quirks of specific products.
*/
struct usb_device_id {
/* which fields to match against? */
u16 match_flags;
/* Used for product specific matches; range is inclusive */
u16 idVendor;
u16 idProduct;
u16 bcdDevice_lo;
u16 bcdDevice_hi;
/* Used for device class matches */
u8 bDeviceClass;
u8 bDeviceSubClass;
u8 bDeviceProtocol;
/* Used for interface class matches */
u8 bInterfaceClass;
u8 bInterfaceSubClass;
u8 bInterfaceProtocol;
/* Used for vendor-specific interface matches */
u8 bInterfaceNumber;
/* not matched against */
ulong driver_info;
};
/* Some useful macros to use to create struct usb_device_id */
#define USB_DEVICE_ID_MATCH_VENDOR 0x0001
#define USB_DEVICE_ID_MATCH_PRODUCT 0x0002
#define USB_DEVICE_ID_MATCH_DEV_LO 0x0004
#define USB_DEVICE_ID_MATCH_DEV_HI 0x0008
#define USB_DEVICE_ID_MATCH_DEV_CLASS 0x0010
#define USB_DEVICE_ID_MATCH_DEV_SUBCLASS 0x0020
#define USB_DEVICE_ID_MATCH_DEV_PROTOCOL 0x0040
#define USB_DEVICE_ID_MATCH_INT_CLASS 0x0080
#define USB_DEVICE_ID_MATCH_INT_SUBCLASS 0x0100
#define USB_DEVICE_ID_MATCH_INT_PROTOCOL 0x0200
#define USB_DEVICE_ID_MATCH_INT_NUMBER 0x0400
/* Match anything, indicates this is a valid entry even if everything is 0 */
#define USB_DEVICE_ID_MATCH_NONE 0x0800
#define USB_DEVICE_ID_MATCH_ALL 0x07ff
/**
* struct usb_driver_entry - Matches a driver to its usb_device_ids
* @driver: Driver to use
* @match: List of match records for this driver, terminated by {}
*/
struct usb_driver_entry {
struct driver *driver;
const struct usb_device_id *match;
};
#define USB_DEVICE_ID_MATCH_DEVICE \
(USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT)
/**
* USB_DEVICE - macro used to describe a specific usb device
* @vend: the 16 bit USB Vendor ID
* @prod: the 16 bit USB Product ID
*
* This macro is used to create a struct usb_device_id that matches a
* specific device.
*/
#define USB_DEVICE(vend, prod) \
.match_flags = USB_DEVICE_ID_MATCH_DEVICE, \
.idVendor = (vend), \
.idProduct = (prod)
#define U_BOOT_USB_DEVICE(__name, __match) \
ll_entry_declare(struct usb_driver_entry, __name, usb_driver_entry) = {\
.driver = llsym(struct driver, __name, driver), \
.match = __match, \
}
/*************************************************************************
* Hub Stuff
*/
struct usb_port_status {
unsigned short wPortStatus;
unsigned short wPortChange;
} __attribute__ ((packed));
struct usb_hub_status {
unsigned short wHubStatus;
unsigned short wHubChange;
} __attribute__ ((packed));
/*
* Hub Device descriptor
* USB Hub class device protocols
*/
#define USB_HUB_PR_FS 0 /* Full speed hub */
#define USB_HUB_PR_HS_NO_TT 0 /* Hi-speed hub without TT */
#define USB_HUB_PR_HS_SINGLE_TT 1 /* Hi-speed hub with single TT */
#define USB_HUB_PR_HS_MULTI_TT 2 /* Hi-speed hub with multiple TT */
#define USB_HUB_PR_SS 3 /* Super speed hub */
/* Transaction Translator Think Times, in bits */
#define HUB_TTTT_8_BITS 0x00
#define HUB_TTTT_16_BITS 0x20
#define HUB_TTTT_24_BITS 0x40
#define HUB_TTTT_32_BITS 0x60
/* Hub descriptor */
struct usb_hub_descriptor {
unsigned char bLength;
unsigned char bDescriptorType;
unsigned char bNbrPorts;
unsigned short wHubCharacteristics;
unsigned char bPwrOn2PwrGood;
unsigned char bHubContrCurrent;
/* 2.0 and 3.0 hubs differ here */
union {
struct {
/* add 1 bit for hub status change; round to bytes */
__u8 DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8];
__u8 PortPowerCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8];
} __attribute__ ((packed)) hs;
struct {
__u8 bHubHdrDecLat;
__le16 wHubDelay;
__le16 DeviceRemovable;
} __attribute__ ((packed)) ss;
} u;
} __attribute__ ((packed));
struct usb_hub_device {
struct usb_device *pusb_dev;
struct usb_hub_descriptor desc;
ulong connect_timeout; /* Device connection timeout in ms */
ulong query_delay; /* Device query delay in ms */
int overcurrent_count[USB_MAXCHILDREN]; /* Over-current counter */
int hub_depth; /* USB 3.0 hub depth */
struct usb_tt tt; /* Transaction Translator */
};
#if CONFIG_IS_ENABLED(DM_USB)
/**
* struct usb_plat - Platform data about a USB controller
*
* Given a USB controller (UCLASS_USB) dev this is dev_get_plat(dev)
*/
struct usb_plat {
enum usb_init_type init_type;
};
/**
* struct usb_dev_plat - Platform data about a USB device
*
* Given a USB device dev this structure is dev_get_parent_plat(dev).
* This is used by sandbox to provide emulation data also.
*
* @id: ID used to match this device
* @devnum: Device address on the USB bus
* @udev: usb-uclass internal use only do NOT use
* @strings: List of descriptor strings (for sandbox emulation purposes)
* @desc_list: List of descriptors (for sandbox emulation purposes)
*/
struct usb_dev_plat {
struct usb_device_id id;
int devnum;
/*
* This pointer is used to pass the usb_device used in usb_scan_device,
* to get the usb descriptors before the driver is known, to the
* actual udevice once the driver is known and the udevice is created.
* This will be NULL except during probe, do NOT use.
*
* This should eventually go away.
*/
struct usb_device *udev;
#ifdef CONFIG_SANDBOX
struct usb_string *strings;
/* NULL-terminated list of descriptor pointers */
struct usb_generic_descriptor **desc_list;
#endif
int configno;
};
/**
* struct usb_bus_priv - information about the USB controller
*
* Given a USB controller (UCLASS_USB) 'dev', this is
* dev_get_uclass_priv(dev).
*
* @next_addr: Next device address to allocate minus 1. Incremented by 1
* each time a new device address is set, so this holds the
* number of devices on the bus
* @desc_before_addr: true if we can read a device descriptor before it
* has been assigned an address. For XHCI this is not possible
* so this will be false.
* @companion: True if this is a companion controller to another USB
* controller
*/
struct usb_bus_priv {
int next_addr;
bool desc_before_addr;
bool companion;
};
/**
* struct usb_emul_plat - platform data about the USB emulator
*
* Given a USB emulator (UCLASS_USB_EMUL) 'dev', this is
* dev_get_uclass_plat(dev).
*
* @port1: USB emulator device port number on the parent hub
*/
struct usb_emul_plat {
int port1; /* Port number (numbered from 1) */
};
/**
* struct dm_usb_ops - USB controller operations
*
* This defines the operations supoorted on a USB controller. Common
* arguments are:
*
* @bus: USB bus (i.e. controller), which is in UCLASS_USB.
* @udev: USB device parent data. Controllers are not expected to need
* this, since the device address on the bus is encoded in @pipe.
* It is used for sandbox, and can be handy for debugging and
* logging.
* @pipe: An assortment of bitfields which provide address and packet
* type information. See create_pipe() above for encoding
* details
* @buffer: A buffer to use for sending/receiving. This should be
* DMA-aligned.
* @length: Buffer length in bytes
*/
struct dm_usb_ops {
/**
* control() - Send a control message
*
* Most parameters are as above.
*
* @setup: Additional setup information required by the message
*/
int (*control)(struct udevice *bus, struct usb_device *udev,
unsigned long pipe, void *buffer, int length,
struct devrequest *setup);
/**
* bulk() - Send a bulk message
*
* Parameters are as above.
*/
int (*bulk)(struct udevice *bus, struct usb_device *udev,
unsigned long pipe, void *buffer, int length);
/**
* interrupt() - Send an interrupt message
*
* Most parameters are as above.
*
* @interval: Interrupt interval
*/
int (*interrupt)(struct udevice *bus, struct usb_device *udev,
unsigned long pipe, void *buffer, int length,
int interval, bool nonblock);
/**
* create_int_queue() - Create and queue interrupt packets
*
* Create and queue @queuesize number of interrupt usb packets of
* @elementsize bytes each. @buffer must be atleast @queuesize *
* @elementsize bytes.
*
* Note some controllers only support a queuesize of 1.
*
* @interval: Interrupt interval
*
* @return A pointer to the created interrupt queue or NULL on error
*/
struct int_queue * (*create_int_queue)(struct udevice *bus,
struct usb_device *udev, unsigned long pipe,
int queuesize, int elementsize, void *buffer,
int interval);
/**
* poll_int_queue() - Poll an interrupt queue for completed packets
*
* Poll an interrupt queue for completed packets. The return value
* points to the part of the buffer passed to create_int_queue()
* corresponding to the completed packet.
*
* @queue: queue to poll
*
* @return Pointer to the data of the first completed packet, or
* NULL if no packets are ready
*/
void * (*poll_int_queue)(struct udevice *bus, struct usb_device *udev,
struct int_queue *queue);
/**
* destroy_int_queue() - Destroy an interrupt queue
*
* Destroy an interrupt queue created by create_int_queue().
*
* @queue: queue to poll
*
* @return 0 if OK, -ve on error
*/
int (*destroy_int_queue)(struct udevice *bus, struct usb_device *udev,
struct int_queue *queue);
/**
* alloc_device() - Allocate a new device context (XHCI)
*
* Before sending packets to a new device on an XHCI bus, a device
* context must be created. If this method is not NULL it will be
* called before the device is enumerated (even before its descriptor
* is read). This should be NULL for EHCI, which does not need this.
*/
int (*alloc_device)(struct udevice *bus, struct usb_device *udev);
/**
* reset_root_port() - Reset usb root port
*/
int (*reset_root_port)(struct udevice *bus, struct usb_device *udev);
/**
* update_hub_device() - Update HCD's internal representation of hub
*
* After a hub descriptor is fetched, notify HCD so that its internal
* representation of this hub can be updated (xHCI)
*/
int (*update_hub_device)(struct udevice *bus, struct usb_device *udev);
/**
* get_max_xfer_size() - Get HCD's maximum transfer bytes
*
* The HCD may have limitation on the maximum bytes to be transferred
* in a USB transfer. USB class driver needs to be aware of this.
*/
int (*get_max_xfer_size)(struct udevice *bus, size_t *size);
/**
* lock_async() - Keep async schedule after a transfer
*
* It may be desired to keep the asynchronous schedule running even
* after a transfer finishes, usually when doing multiple transfers
* back-to-back. This callback allows signalling the USB controller
* driver to do just that.
*/
int (*lock_async)(struct udevice *udev, int lock);
};
#define usb_get_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
#define usb_get_emul_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
/**
* usb_get_dev_index() - look up a device index number
*
* Look up devices using their index number (starting at 0). This works since
* in U-Boot device addresses are allocated starting at 1 with no gaps.
*
* TODO(sjg@chromium.org): Remove this function when usb_ether.c is modified
* to work better with driver model.
*
* @bus: USB bus to check
* @index: Index number of device to find (0=first). This is just the
* device address less 1.
*/
struct usb_device *usb_get_dev_index(struct udevice *bus, int index);
/**
* usb_setup_device() - set up a device ready for use
*
* @dev: USB device pointer. This need not be a real device - it is
* common for it to just be a local variable with its ->dev
* member (i.e. @dev->dev) set to the parent device and
* dev->portnr set to the port number on the hub (1=first)
* @do_read: true to read the device descriptor before an address is set
* (should be false for XHCI buses, true otherwise)
* @parent: Parent device (either UCLASS_USB or UCLASS_USB_HUB)
* Return: 0 if OK, -ve on error */
int usb_setup_device(struct usb_device *dev, bool do_read,
struct usb_device *parent);
/**
* usb_hub_is_root_hub() - Test whether a hub device is root hub or not
*
* @hub: USB hub device to test
* @return: true if the hub device is root hub, false otherwise.
*/
bool usb_hub_is_root_hub(struct udevice *hub);
/**
* usb_hub_scan() - Scan a hub and find its devices
*
* @hub: Hub device to scan
*/
int usb_hub_scan(struct udevice *hub);
/**
* usb_scan_device() - Scan a device on a bus
*
* Scan a device on a bus. It has already been detected and is ready to
* be enumerated. This may be either the root hub (@parent is a bus) or a
* normal device (@parent is a hub)
*
* @parent: Parent device
* @port: Hub port number (numbered from 1)
* @speed: USB speed to use for this device
* @devp: Returns pointer to device if all is well
* Return: 0 if OK, -ve on error
*/
int usb_scan_device(struct udevice *parent, int port,
enum usb_device_speed speed, struct udevice **devp);
/**
* usb_get_bus() - Find the bus for a device
*
* Search up through parents to find the bus this device is connected to. This
* will be a device with uclass UCLASS_USB.
*
* @dev: Device to check
* Return: The bus, or NULL if not found (this indicates a critical error in
* the USB stack
*/
struct udevice *usb_get_bus(struct udevice *dev);
/**
* usb_select_config() - Set up a device ready for use
*
* This function assumes that the device already has an address and a driver
* bound, and is ready to be set up.
*
* This re-reads the device and configuration descriptors and sets the
* configuration
*
* @dev: Device to set up
*/
int usb_select_config(struct usb_device *dev);
/**
* usb_child_pre_probe() - Pre-probe function for USB devices
*
* This is called on all children of hubs and USB controllers (i.e. UCLASS_USB
* and UCLASS_USB_HUB) when a new device is about to be probed. It sets up the
* device from the saved platform data and calls usb_select_config() to
* finish set up.
*
* Once this is done, the device's normal driver can take over, knowing the
* device is accessible on the USB bus.
*
* This function is for use only by the internal USB stack.
*
* @dev: Device to set up
*/
int usb_child_pre_probe(struct udevice *dev);
struct ehci_ctrl;
/**
* usb_setup_ehci_gadget() - Set up a USB device as a gadget
*
* TODO(sjg@chromium.org): Tidy this up when USB gadgets can use driver model
*
* This provides a way to tell a controller to start up as a USB device
* instead of as a host. It is untested.
*/
int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp);
/**
* usb_remove_ehci_gadget() - Remove a gadget USB device
*
* TODO(sjg@chromium.org): Tidy this up when USB gadgets can use driver model
*
* This provides a way to tell a controller to remove a USB device
*/
int usb_remove_ehci_gadget(struct ehci_ctrl **ctlrp);
/**
* usb_stor_reset() - Prepare to scan USB storage devices
*
* Empty the list of USB storage devices in preparation for scanning them.
* This must be called before a USB scan.
*/
void usb_stor_reset(void);
#else /* !CONFIG_IS_ENABLED(DM_USB) */
struct usb_device *usb_get_dev_index(int index);
#endif
bool usb_device_has_child_on_port(struct usb_device *parent, int port);
int usb_hub_probe(struct usb_device *dev, int ifnum);
void usb_hub_reset(void);
/*
* usb_find_usb2_hub_address_port() - Get hub address and port for TT setting
*
* Searches for the first HS hub above the given device. If a
* HS hub is found, the hub address and the port the device is
* connected to is return, as required for SPLIT transactions
*
* @param: udev full speed or low speed device
*/
void usb_find_usb2_hub_address_port(struct usb_device *udev,
uint8_t *hub_address, uint8_t *hub_port);
/**
* usb_alloc_new_device() - Allocate a new device
*
* @devp: returns a pointer of a new device structure. With driver model this
* is a device pointer, but with legacy USB this pointer is
* driver-specific.
* Return: 0 if OK, -ENOSPC if we have found out of room for new devices
*/
int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp);
/**
* usb_free_device() - Free a partially-inited device
*
* This is an internal function. It is used to reverse the action of
* usb_alloc_new_device() when we hit a problem during init.
*/
void usb_free_device(struct udevice *controller);
int usb_new_device(struct usb_device *dev);
int usb_alloc_device(struct usb_device *dev);
/**
* usb_update_hub_device() - Update HCD's internal representation of hub
*
* After a hub descriptor is fetched, notify HCD so that its internal
* representation of this hub can be updated.
*
* @dev: Hub device
* Return: 0 if OK, -ve on error
*/
int usb_update_hub_device(struct usb_device *dev);
/**
* usb_get_max_xfer_size() - Get HCD's maximum transfer bytes
*
* The HCD may have limitation on the maximum bytes to be transferred
* in a USB transfer. USB class driver needs to be aware of this.
*
* @dev: USB device
* @size: maximum transfer bytes
* Return: 0 if OK, -ve on error
*/
int usb_get_max_xfer_size(struct usb_device *dev, size_t *size);
/**
* usb_emul_setup_device() - Set up a new USB device emulation
*
* This is normally called when a new emulation device is bound. It tells
* the USB emulation uclass about the features of the emulator.
*
* @dev: Emulation device
* @strings: List of USB string descriptors, terminated by a NULL
* entry
* @desc_list: List of points or USB descriptors, terminated by NULL.
* The first entry must be struct usb_device_descriptor,
* and others follow on after that.
* Return: 0 if OK, -ENOSYS if not implemented, other -ve on error
*/
int usb_emul_setup_device(struct udevice *dev, struct usb_string *strings,
void **desc_list);
/**
* usb_emul_control() - Send a control packet to an emulator
*
* @emul: Emulator device
* @udev: USB device (which the emulator is causing to appear)
* See struct dm_usb_ops for details on other parameters
* Return: 0 if OK, -ve on error
*/
int usb_emul_control(struct udevice *emul, struct usb_device *udev,
unsigned long pipe, void *buffer, int length,
struct devrequest *setup);
/**
* usb_emul_bulk() - Send a bulk packet to an emulator
*
* @emul: Emulator device
* @udev: USB device (which the emulator is causing to appear)
* See struct dm_usb_ops for details on other parameters
* Return: 0 if OK, -ve on error
*/
int usb_emul_bulk(struct udevice *emul, struct usb_device *udev,
unsigned long pipe, void *buffer, int length);
/**
* usb_emul_int() - Send an interrupt packet to an emulator
*
* @emul: Emulator device
* @udev: USB device (which the emulator is causing to appear)
* See struct dm_usb_ops for details on other parameters
* Return: 0 if OK, -ve on error
*/
int usb_emul_int(struct udevice *emul, struct usb_device *udev,
unsigned long pipe, void *buffer, int length, int interval,
bool nonblock);
/**
* usb_emul_find() - Find an emulator for a particular device
*
* Check @pipe and @port1 to find a device number on bus @bus and return it.
*
* @bus: USB bus (controller)
* @pipe: Describes pipe being used, and includes the device number
* @port1: Describes port number on the parent hub
* @emulp: Returns pointer to emulator, or NULL if not found
* Return: 0 if found, -ve on error
*/
int usb_emul_find(struct udevice *bus, ulong pipe, int port1,
struct udevice **emulp);
/**
* usb_emul_find_for_dev() - Find an emulator for a particular device
*
* @dev: USB device to check
* @emulp: Returns pointer to emulator, or NULL if not found
* Return: 0 if found, -ve on error
*/
int usb_emul_find_for_dev(struct udevice *dev, struct udevice **emulp);
/**
* usb_emul_find_descriptor() - Find a USB descriptor of a particular device
*
* @ptr: a pointer to a list of USB descriptor pointers
* @type: type of USB descriptor to find
* @index: if @type is USB_DT_CONFIG, this is the configuration value
* Return: a pointer to the USB descriptor found, NULL if not found
*/
struct usb_generic_descriptor **usb_emul_find_descriptor(
struct usb_generic_descriptor **ptr, int type, int index);
/**
* usb_show_tree() - show the USB device tree
*
* This shows a list of active USB devices along with basic information about
* each.
*/
void usb_show_tree(void);
#endif /*_USB_H_ */
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