mirror of
https://github.com/AsahiLinux/u-boot
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71c5de4f4a
The USB spec says that 32 bytes is the minimum required alignment.
However on some platforms we have a larger minimum requirement for cache
coherency. In those cases, use that value rather than the USB spec
minimum. We add a cpp check to <usb.h> to define USB_DMA_MINALIGN and
make use of it in ehci-hcd.c and musb_core.h. We cannot use MAX() here
as we are not allowed to have tests inside of align(...).
Signed-off-by: Tom Rini <trini@ti.com>
[marek.vasut]: introduce some crazy macro voodoo
Signed-off-by: Marek Vasut <marex@denx.de>
[ilya.yanok]: moved external buffer fixes to separate patch,
we use {ALLOC,DEFINE}_ALIGN_BUFFER macros with alignment of USB_DMA_MINALIGN
for qh_list, qh and qtd structures to make sure they are proper aligned
for both controller and cache operations.
Signed-off-by: Ilya Yanok <ilya.yanok@cogentembedded.com>
388 lines
12 KiB
C
388 lines
12 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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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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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 <usb_defs.h>
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#include <usbdescriptors.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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unsigned char requesttype;
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unsigned char request;
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unsigned short value;
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unsigned short index;
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unsigned short length;
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} __attribute__ ((packed));
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/* All standard descriptors have these 2 fields in common */
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struct usb_descriptor_header {
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unsigned char bLength;
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unsigned char bDescriptorType;
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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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unsigned char no_of_ep;
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unsigned char num_altsetting;
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unsigned char act_altsetting;
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struct usb_endpoint_descriptor ep_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_configuration_descriptor desc;
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unsigned char 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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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; /* transfered 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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int act_len; /* transfered bytes */
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int maxchild; /* Number of ports if hub */
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int portnr;
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struct usb_device *parent;
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struct usb_device *children[USB_MAXCHILDREN];
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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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#if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \
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defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \
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defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
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defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
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defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \
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defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X)
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int usb_lowlevel_init(void);
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int usb_lowlevel_stop(void);
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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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/* 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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#else
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#error USB Lowlevel not defined
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#endif
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#ifdef CONFIG_USB_STORAGE
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#define USB_MAX_STOR_DEV 5
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block_dev_desc_t *usb_stor_get_dev(int index);
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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(void);
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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_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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struct usb_device *usb_get_dev_index(int index);
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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, unsigned char *buffer,
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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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/* 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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* - speed: bit 26 (0 = Full, 1 = Low Speed, 2 = High)
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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)->speed << 26) | (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_pipespeed(pipe) (((pipe) >> 26) & 3)
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#define usb_pipeslow(pipe) (usb_pipespeed(pipe) == USB_SPEED_LOW)
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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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/*************************************************************************
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* Hub Stuff
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*/
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struct usb_port_status {
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unsigned short wPortStatus;
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unsigned short wPortChange;
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} __attribute__ ((packed));
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struct usb_hub_status {
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unsigned short wHubStatus;
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unsigned short wHubChange;
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} __attribute__ ((packed));
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/* Hub descriptor */
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struct usb_hub_descriptor {
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unsigned char bLength;
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unsigned char bDescriptorType;
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unsigned char bNbrPorts;
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unsigned short wHubCharacteristics;
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unsigned char bPwrOn2PwrGood;
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unsigned char bHubContrCurrent;
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unsigned char DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
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unsigned char PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
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/* DeviceRemovable and PortPwrCtrlMask want to be variable-length
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bitmaps that hold max 255 entries. (bit0 is ignored) */
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} __attribute__ ((packed));
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struct usb_hub_device {
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struct usb_device *pusb_dev;
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struct usb_hub_descriptor desc;
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};
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int usb_hub_probe(struct usb_device *dev, int ifnum);
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void usb_hub_reset(void);
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int hub_port_reset(struct usb_device *dev, int port,
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unsigned short *portstat);
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struct usb_device *usb_alloc_new_device(void);
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int usb_new_device(struct usb_device *dev);
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#endif /*_USB_H_ */
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