forked from rrcarlosr/Jetpack
1006 lines
33 KiB
C
1006 lines
33 KiB
C
/*
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* (C) Copyright 2001
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* Denis Peter, MPL AG Switzerland
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*
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* Adapted for U-Boot driver model
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* (C) Copyright 2015 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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* Note: Part of this code has been derived from linux
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*
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*/
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#ifndef _USB_H_
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#define _USB_H_
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#include <fdtdec.h>
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#include <usb_defs.h>
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#include <linux/usb/ch9.h>
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#include <asm/cache.h>
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#include <part.h>
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/*
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* The EHCI spec says that we must align to at least 32 bytes. However,
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* some platforms require larger alignment.
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*/
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#if ARCH_DMA_MINALIGN > 32
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#define USB_DMA_MINALIGN ARCH_DMA_MINALIGN
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#else
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#define USB_DMA_MINALIGN 32
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#endif
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/* Everything is aribtrary */
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#define USB_ALTSETTINGALLOC 4
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#define USB_MAXALTSETTING 128 /* Hard limit */
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#define USB_MAX_DEVICE 32
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#define USB_MAXCONFIG 8
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#define USB_MAXINTERFACES 8
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#define USB_MAXENDPOINTS 16
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#define USB_MAXCHILDREN 8 /* This is arbitrary */
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#define USB_MAX_HUB 16
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#define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
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/*
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* This is the timeout to allow for submitting an urb in ms. We allow more
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* time for a BULK device to react - some are slow.
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*/
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#define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)
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/* device request (setup) */
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struct devrequest {
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__u8 requesttype;
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__u8 request;
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__le16 value;
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__le16 index;
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__le16 length;
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} __attribute__ ((packed));
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/* Interface */
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struct usb_interface {
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struct usb_interface_descriptor desc;
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__u8 no_of_ep;
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__u8 num_altsetting;
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__u8 act_altsetting;
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struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
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/*
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* Super Speed Device will have Super Speed Endpoint
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* Companion Descriptor (section 9.6.7 of usb 3.0 spec)
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* Revision 1.0 June 6th 2011
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*/
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struct usb_ss_ep_comp_descriptor ss_ep_comp_desc[USB_MAXENDPOINTS];
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} __attribute__ ((packed));
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/* Configuration information.. */
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struct usb_config {
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struct usb_config_descriptor desc;
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__u8 no_of_if; /* number of interfaces */
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struct usb_interface if_desc[USB_MAXINTERFACES];
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} __attribute__ ((packed));
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enum {
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/* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
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PACKET_SIZE_8 = 0,
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PACKET_SIZE_16 = 1,
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PACKET_SIZE_32 = 2,
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PACKET_SIZE_64 = 3,
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};
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/**
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* struct usb_device - information about a USB device
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*
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* With driver model both UCLASS_USB (the USB controllers) and UCLASS_USB_HUB
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* (the hubs) have this as parent data. Hubs are children of controllers or
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* other hubs and there is always a single root hub for each controller.
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* Therefore struct usb_device can always be accessed with
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* dev_get_parent_priv(dev), where dev is a USB device.
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*
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* Pointers exist for obtaining both the device (could be any uclass) and
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* controller (UCLASS_USB) from this structure. The controller does not have
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* a struct usb_device since it is not a device.
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*/
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struct usb_device {
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int devnum; /* Device number on USB bus */
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int speed; /* full/low/high */
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char mf[32]; /* manufacturer */
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char prod[32]; /* product */
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char serial[32]; /* serial number */
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/* Maximum packet size; one of: PACKET_SIZE_* */
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int maxpacketsize;
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/* one bit for each endpoint ([0] = IN, [1] = OUT) */
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unsigned int toggle[2];
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/* endpoint halts; one bit per endpoint # & direction;
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* [0] = IN, [1] = OUT
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*/
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unsigned int halted[2];
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int epmaxpacketin[16]; /* INput endpoint specific maximums */
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int epmaxpacketout[16]; /* OUTput endpoint specific maximums */
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int configno; /* selected config number */
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/* Device Descriptor */
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struct usb_device_descriptor descriptor
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__attribute__((aligned(ARCH_DMA_MINALIGN)));
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struct usb_config config; /* config descriptor */
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int have_langid; /* whether string_langid is valid yet */
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int string_langid; /* language ID for strings */
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int (*irq_handle)(struct usb_device *dev);
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unsigned long irq_status;
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int irq_act_len; /* transferred bytes */
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void *privptr;
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/*
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* Child devices - if this is a hub device
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* Each instance needs its own set of data structures.
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*/
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unsigned long status;
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unsigned long int_pending; /* 1 bit per ep, used by int_queue */
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int act_len; /* transferred bytes */
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int maxchild; /* Number of ports if hub */
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int portnr; /* Port number, 1=first */
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#ifndef CONFIG_DM_USB
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/* parent hub, or NULL if this is the root hub */
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struct usb_device *parent;
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struct usb_device *children[USB_MAXCHILDREN];
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void *controller; /* hardware controller private data */
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#endif
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/* slot_id - for xHCI enabled devices */
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unsigned int slot_id;
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#ifdef CONFIG_DM_USB
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struct udevice *dev; /* Pointer to associated device */
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struct udevice *controller_dev; /* Pointer to associated controller */
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#endif
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};
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struct int_queue;
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/*
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* You can initialize platform's USB host or device
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* ports by passing this enum as an argument to
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* board_usb_init().
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*/
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enum usb_init_type {
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USB_INIT_HOST,
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USB_INIT_DEVICE
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};
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/**********************************************************************
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* this is how the lowlevel part communicate with the outer world
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*/
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int usb_lowlevel_init(int index, enum usb_init_type init, void **controller);
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int usb_lowlevel_stop(int index);
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#if defined(CONFIG_USB_MUSB_HOST) || defined(CONFIG_DM_USB)
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int usb_reset_root_port(struct usb_device *dev);
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#else
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#define usb_reset_root_port(dev)
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#endif
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int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
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void *buffer, int transfer_len);
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int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
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int transfer_len, struct devrequest *setup);
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int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
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int transfer_len, int interval);
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#if defined CONFIG_USB_EHCI || defined CONFIG_USB_MUSB_HOST || defined(CONFIG_DM_USB)
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struct int_queue *create_int_queue(struct usb_device *dev, unsigned long pipe,
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int queuesize, int elementsize, void *buffer, int interval);
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int destroy_int_queue(struct usb_device *dev, struct int_queue *queue);
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void *poll_int_queue(struct usb_device *dev, struct int_queue *queue);
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#endif
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/* Defines */
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#define USB_UHCI_VEND_ID 0x8086
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#define USB_UHCI_DEV_ID 0x7112
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/*
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* PXA25x can only act as USB device. There are drivers
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* which works with USB CDC gadgets implementations.
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* Some of them have common routines which can be used
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* in boards init functions e.g. udc_disconnect() used for
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* forced device disconnection from host.
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*/
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extern void udc_disconnect(void);
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/*
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* board-specific hardware initialization, called by
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* usb drivers and u-boot commands
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*
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* @param index USB controller number
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* @param init initializes controller as USB host or device
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*/
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int board_usb_init(int index, enum usb_init_type init);
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/*
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* can be used to clean up after failed USB initialization attempt
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* vide: board_usb_init()
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*
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* @param index USB controller number for selective cleanup
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* @param init usb_init_type passed to board_usb_init()
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*/
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int board_usb_cleanup(int index, enum usb_init_type init);
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#ifdef CONFIG_USB_STORAGE
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#define USB_MAX_STOR_DEV 7
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int usb_stor_scan(int mode);
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int usb_stor_info(void);
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#endif
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#ifdef CONFIG_USB_HOST_ETHER
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#define USB_MAX_ETH_DEV 5
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int usb_host_eth_scan(int mode);
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#endif
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#ifdef CONFIG_USB_KEYBOARD
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int drv_usb_kbd_init(void);
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int usb_kbd_deregister(int force);
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#endif
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/* routines */
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int usb_init(void); /* initialize the USB Controller */
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int usb_stop(void); /* stop the USB Controller */
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int usb_detect_change(void); /* detect if a USB device has been (un)plugged */
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int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
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int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
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int report_id);
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int usb_control_msg(struct usb_device *dev, unsigned int pipe,
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unsigned char request, unsigned char requesttype,
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unsigned short value, unsigned short index,
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void *data, unsigned short size, int timeout);
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int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
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void *data, int len, int *actual_length, int timeout);
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int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
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void *buffer, int transfer_len, int interval);
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int usb_disable_asynch(int disable);
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int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
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int usb_get_configuration_no(struct usb_device *dev, int cfgno,
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unsigned char *buffer, int length);
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int usb_get_configuration_len(struct usb_device *dev, int cfgno);
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int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
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unsigned char id, void *buf, int size);
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int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
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unsigned char type, unsigned char id, void *buf,
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int size);
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int usb_clear_halt(struct usb_device *dev, int pipe);
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int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
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int usb_set_interface(struct usb_device *dev, int interface, int alternate);
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int usb_get_port_status(struct usb_device *dev, int port, void *data);
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/* big endian -> little endian conversion */
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/* some CPUs are already little endian e.g. the ARM920T */
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#define __swap_16(x) \
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({ unsigned short x_ = (unsigned short)x; \
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(unsigned short)( \
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((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
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})
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#define __swap_32(x) \
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({ unsigned long x_ = (unsigned long)x; \
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(unsigned long)( \
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((x_ & 0x000000FFUL) << 24) | \
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((x_ & 0x0000FF00UL) << 8) | \
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((x_ & 0x00FF0000UL) >> 8) | \
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((x_ & 0xFF000000UL) >> 24)); \
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})
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#ifdef __LITTLE_ENDIAN
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# define swap_16(x) (x)
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# define swap_32(x) (x)
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#else
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# define swap_16(x) __swap_16(x)
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# define swap_32(x) __swap_32(x)
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#endif
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/*
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* Calling this entity a "pipe" is glorifying it. A USB pipe
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* is something embarrassingly simple: it basically consists
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* of the following information:
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* - device number (7 bits)
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* - endpoint number (4 bits)
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* - current Data0/1 state (1 bit)
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* - direction (1 bit)
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* - speed (2 bits)
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* - max packet size (2 bits: 8, 16, 32 or 64)
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* - pipe type (2 bits: control, interrupt, bulk, isochronous)
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*
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* That's 18 bits. Really. Nothing more. And the USB people have
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* documented these eighteen bits as some kind of glorious
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* virtual data structure.
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*
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* Let's not fall in that trap. We'll just encode it as a simple
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* unsigned int. The encoding is:
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*
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* - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64)
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* - direction: bit 7 (0 = Host-to-Device [Out],
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* (1 = Device-to-Host [In])
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* - device: bits 8-14
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* - endpoint: bits 15-18
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* - Data0/1: bit 19
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* - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt,
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* 10 = control, 11 = bulk)
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*
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* Why? Because it's arbitrary, and whatever encoding we select is really
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* up to us. This one happens to share a lot of bit positions with the UHCI
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* specification, so that much of the uhci driver can just mask the bits
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* appropriately.
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*/
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/* Create various pipes... */
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#define create_pipe(dev,endpoint) \
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(((dev)->devnum << 8) | ((endpoint) << 15) | \
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(dev)->maxpacketsize)
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#define default_pipe(dev) ((dev)->speed << 26)
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#define usb_sndctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
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create_pipe(dev, endpoint))
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#define usb_rcvctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
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create_pipe(dev, endpoint) | \
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USB_DIR_IN)
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#define usb_sndisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
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create_pipe(dev, endpoint))
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#define usb_rcvisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
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create_pipe(dev, endpoint) | \
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USB_DIR_IN)
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#define usb_sndbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
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create_pipe(dev, endpoint))
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#define usb_rcvbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
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create_pipe(dev, endpoint) | \
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USB_DIR_IN)
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#define usb_sndintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
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create_pipe(dev, endpoint))
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#define usb_rcvintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
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create_pipe(dev, endpoint) | \
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USB_DIR_IN)
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#define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \
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default_pipe(dev))
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#define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \
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default_pipe(dev) | \
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USB_DIR_IN)
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/* The D0/D1 toggle bits */
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#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
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#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep))
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#define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
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((dev)->toggle[out] & \
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~(1 << ep)) | ((bit) << ep))
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/* Endpoint halt control/status */
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#define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1)
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#define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
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#define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
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#define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
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#define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
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USB_PID_OUT)
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#define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1)
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#define usb_pipein(pipe) (((pipe) >> 7) & 1)
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#define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f)
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#define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff)
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#define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf)
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#define usb_pipedata(pipe) (((pipe) >> 19) & 1)
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#define usb_pipetype(pipe) (((pipe) >> 30) & 3)
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#define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
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#define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT)
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#define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
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#define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)
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#define usb_pipe_ep_index(pipe) \
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usb_pipecontrol(pipe) ? (usb_pipeendpoint(pipe) * 2) : \
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((usb_pipeendpoint(pipe) * 2) - \
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(usb_pipein(pipe) ? 0 : 1))
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/**
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* struct usb_device_id - identifies USB devices for probing and hotplugging
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* @match_flags: Bit mask controlling which of the other fields are used to
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* match against new devices. Any field except for driver_info may be
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* used, although some only make sense in conjunction with other fields.
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* This is usually set by a USB_DEVICE_*() macro, which sets all
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* other fields in this structure except for driver_info.
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* @idVendor: USB vendor ID for a device; numbers are assigned
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* by the USB forum to its members.
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* @idProduct: Vendor-assigned product ID.
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* @bcdDevice_lo: Low end of range of vendor-assigned product version numbers.
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* This is also used to identify individual product versions, for
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* a range consisting of a single device.
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* @bcdDevice_hi: High end of version number range. The range of product
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* versions is inclusive.
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* @bDeviceClass: Class of device; numbers are assigned
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* by the USB forum. Products may choose to implement classes,
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* or be vendor-specific. Device classes specify behavior of all
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* the interfaces on a device.
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* @bDeviceSubClass: Subclass of device; associated with bDeviceClass.
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* @bDeviceProtocol: Protocol of device; associated with bDeviceClass.
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* @bInterfaceClass: Class of interface; numbers are assigned
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* by the USB forum. Products may choose to implement classes,
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* or be vendor-specific. Interface classes specify behavior only
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* of a given interface; other interfaces may support other classes.
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* @bInterfaceSubClass: Subclass of interface; associated with bInterfaceClass.
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* @bInterfaceProtocol: Protocol of interface; associated with bInterfaceClass.
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* @bInterfaceNumber: Number of interface; composite devices may use
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* fixed interface numbers to differentiate between vendor-specific
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* interfaces.
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* @driver_info: Holds information used by the driver. Usually it holds
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* a pointer to a descriptor understood by the driver, or perhaps
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* device flags.
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*
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* In most cases, drivers will create a table of device IDs by using
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* USB_DEVICE(), or similar macros designed for that purpose.
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* They will then export it to userspace using MODULE_DEVICE_TABLE(),
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* and provide it to the USB core through their usb_driver structure.
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*
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* See the usb_match_id() function for information about how matches are
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* performed. Briefly, you will normally use one of several macros to help
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* construct these entries. Each entry you provide will either identify
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* one or more specific products, or will identify a class of products
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* which have agreed to behave the same. You should put the more specific
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* matches towards the beginning of your table, so that driver_info can
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* record quirks of specific products.
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*/
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struct usb_device_id {
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/* which fields to match against? */
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u16 match_flags;
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/* Used for product specific matches; range is inclusive */
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u16 idVendor;
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u16 idProduct;
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u16 bcdDevice_lo;
|
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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 descriptor */
|
|
struct usb_hub_descriptor {
|
|
unsigned char bLength;
|
|
unsigned char bDescriptorType;
|
|
unsigned char bNbrPorts;
|
|
unsigned short wHubCharacteristics;
|
|
unsigned char bPwrOn2PwrGood;
|
|
unsigned char bHubContrCurrent;
|
|
unsigned char DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
|
|
unsigned char PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
|
|
/* DeviceRemovable and PortPwrCtrlMask want to be variable-length
|
|
bitmaps that hold max 255 entries. (bit0 is ignored) */
|
|
} __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 */
|
|
};
|
|
|
|
#ifdef CONFIG_DM_USB
|
|
/**
|
|
* struct usb_platdata - Platform data about a USB controller
|
|
*
|
|
* Given a USB controller (UCLASS_USB) dev this is dev_get_platdata(dev)
|
|
*/
|
|
struct usb_platdata {
|
|
enum usb_init_type init_type;
|
|
};
|
|
|
|
/**
|
|
* struct usb_dev_platdata - Platform data about a USB device
|
|
*
|
|
* Given a USB device dev this structure is dev_get_parent_platdata(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_platdata {
|
|
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 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);
|
|
|
|
/**
|
|
* 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);
|
|
};
|
|
|
|
#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_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_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_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);
|
|
|
|
/**
|
|
* legacy_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.
|
|
*
|
|
* With driver model this moves to hub_port_reset() and is passed a struct
|
|
* udevice.
|
|
*
|
|
* @dev: USB device to reset
|
|
* @port: Port number to reset (note ports are numbered from 0 here)
|
|
* @portstat: Returns port status
|
|
*/
|
|
int legacy_hub_port_reset(struct usb_device *dev, int port,
|
|
unsigned short *portstat);
|
|
|
|
int hub_port_reset(struct udevice *dev, int port, unsigned short *portstat);
|
|
|
|
/*
|
|
* 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_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
|
|
* @maxpacketsize: Maximum packet size (e.g. PACKET_SIZE_64)
|
|
* @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, -ve on error
|
|
*/
|
|
int usb_emul_setup_device(struct udevice *dev, int maxpacketsize,
|
|
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);
|
|
|
|
/**
|
|
* usb_emul_find() - Find an emulator for a particular device
|
|
*
|
|
* Check @pipe 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
|
|
* @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, struct udevice **emulp);
|
|
|
|
/**
|
|
* usb_emul_find_for_dev() - Find an emulator for a particular device
|
|
*
|
|
* @bus: USB bus (controller)
|
|
* @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_reset() - Reset all emulators ready for use
|
|
*
|
|
* Clear out any address information in the emulators and make then ready for
|
|
* a new USB scan
|
|
*/
|
|
void usb_emul_reset(struct udevice *dev);
|
|
|
|
/**
|
|
* 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_ */
|