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![Jean-Christophe PLAGNIOL-VILLARD](/assets/img/avatar_default.png)
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Remy Böhmer <linux@bohmer.net>
598 lines
17 KiB
C
598 lines
17 KiB
C
/*
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* (C) Copyright 2003
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* Gerry Hamel, geh@ti.com, Texas Instruments
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*
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* (C) Copyright 2006
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* Bryan O'Donoghue, deckard@CodeHermit.ie
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*
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* Based on
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* linux/drivers/usbd/ep0.c
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*
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* Copyright (c) 2000, 2001, 2002 Lineo
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* Copyright (c) 2001 Hewlett Packard
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*
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* By:
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* Stuart Lynne <sl@lineo.com>,
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* Tom Rushworth <tbr@lineo.com>,
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* Bruce Balden <balden@lineo.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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/*
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* This is the builtin ep0 control function. It implements all required functionality
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* for responding to control requests (SETUP packets).
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*
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* XXX
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*
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* Currently we do not pass any SETUP packets (or other) to the configured
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* function driver. This may need to change.
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*
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* XXX
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*
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* As alluded to above, a simple callback cdc_recv_setup has been implemented
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* in the usb_device data structure to facilicate passing
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* Common Device Class packets to a function driver.
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*
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* XXX
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*/
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#include <common.h>
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#include "usbdcore.h"
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#if 0
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#define dbg_ep0(lvl,fmt,args...) serial_printf("[%s] %s:%d: "fmt"\n",__FILE__,__FUNCTION__,__LINE__,##args)
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#else
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#define dbg_ep0(lvl,fmt,args...)
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#endif
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/* EP0 Configuration Set ********************************************************************* */
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/**
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* ep0_get_status - fill in URB data with appropriate status
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* @device:
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* @urb:
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* @index:
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* @requesttype:
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*
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*/
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static int ep0_get_status (struct usb_device_instance *device,
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struct urb *urb, int index, int requesttype)
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{
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char *cp;
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urb->actual_length = 2;
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cp = (char*)urb->buffer;
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cp[0] = cp[1] = 0;
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switch (requesttype) {
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case USB_REQ_RECIPIENT_DEVICE:
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cp[0] = USB_STATUS_SELFPOWERED;
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break;
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case USB_REQ_RECIPIENT_INTERFACE:
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break;
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case USB_REQ_RECIPIENT_ENDPOINT:
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cp[0] = usbd_endpoint_halted (device, index);
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break;
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case USB_REQ_RECIPIENT_OTHER:
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urb->actual_length = 0;
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default:
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break;
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}
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dbg_ep0 (2, "%02x %02x", cp[0], cp[1]);
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return 0;
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}
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/**
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* ep0_get_one
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* @device:
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* @urb:
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* @result:
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*
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* Set a single byte value in the urb send buffer. Return non-zero to signal
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* a request error.
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*/
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static int ep0_get_one (struct usb_device_instance *device, struct urb *urb,
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__u8 result)
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{
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urb->actual_length = 1; /* XXX 2? */
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((char *) urb->buffer)[0] = result;
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return 0;
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}
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/**
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* copy_config
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* @urb: pointer to urb
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* @data: pointer to configuration data
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* @length: length of data
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*
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* Copy configuration data to urb transfer buffer if there is room for it.
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*/
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void copy_config (struct urb *urb, void *data, int max_length,
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int max_buf)
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{
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int available;
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int length;
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/*dbg_ep0(3, "-> actual: %d buf: %d max_buf: %d max_length: %d data: %p", */
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/* urb->actual_length, urb->buffer_length, max_buf, max_length, data); */
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if (!data) {
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dbg_ep0 (1, "data is NULL");
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return;
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}
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length = max_length;
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if (length > max_length) {
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dbg_ep0 (1, "length: %d >= max_length: %d", length,
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max_length);
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return;
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}
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/*dbg_ep0(1, " actual: %d buf: %d max_buf: %d max_length: %d length: %d", */
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/* urb->actual_length, urb->buffer_length, max_buf, max_length, length); */
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if ((available =
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/*urb->buffer_length */ max_buf - urb->actual_length) <= 0) {
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return;
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}
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/*dbg_ep0(1, "actual: %d buf: %d max_buf: %d length: %d available: %d", */
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/* urb->actual_length, urb->buffer_length, max_buf, length, available); */
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if (length > available) {
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length = available;
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}
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/*dbg_ep0(1, "actual: %d buf: %d max_buf: %d length: %d available: %d", */
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/* urb->actual_length, urb->buffer_length, max_buf, length, available); */
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memcpy (urb->buffer + urb->actual_length, data, length);
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urb->actual_length += length;
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dbg_ep0 (3,
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"copy_config: <- actual: %d buf: %d max_buf: %d max_length: %d available: %d",
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urb->actual_length, urb->buffer_length, max_buf, max_length,
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available);
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}
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/**
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* ep0_get_descriptor
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* @device:
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* @urb:
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* @max:
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* @descriptor_type:
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* @index:
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*
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* Called by ep0_rx_process for a get descriptor device command. Determine what
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* descriptor is being requested, copy to send buffer. Return zero if ok to send,
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* return non-zero to signal a request error.
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*/
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static int ep0_get_descriptor (struct usb_device_instance *device,
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struct urb *urb, int max, int descriptor_type,
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int index)
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{
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int port = 0; /* XXX compound device */
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char *cp;
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/*dbg_ep0(3, "max: %x type: %x index: %x", max, descriptor_type, index); */
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if (!urb || !urb->buffer || !urb->buffer_length
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|| (urb->buffer_length < 255)) {
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dbg_ep0 (2, "invalid urb %p", urb);
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return -1L;
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}
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/* setup tx urb */
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urb->actual_length = 0;
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cp = (char*)urb->buffer;
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dbg_ep0 (2, "%s", USBD_DEVICE_DESCRIPTORS (descriptor_type));
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switch (descriptor_type) {
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case USB_DESCRIPTOR_TYPE_DEVICE:
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{
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struct usb_device_descriptor *device_descriptor;
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if (!
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(device_descriptor =
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usbd_device_device_descriptor (device, port))) {
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return -1;
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}
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/* copy descriptor for this device */
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copy_config (urb, device_descriptor,
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sizeof (struct usb_device_descriptor),
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max);
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/* correct the correct control endpoint 0 max packet size into the descriptor */
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device_descriptor =
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(struct usb_device_descriptor *) urb->buffer;
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}
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dbg_ep0(3, "copied device configuration, actual_length: 0x%x", urb->actual_length);
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break;
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case USB_DESCRIPTOR_TYPE_CONFIGURATION:
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{
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struct usb_configuration_descriptor
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*configuration_descriptor;
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struct usb_device_descriptor *device_descriptor;
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if (!
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(device_descriptor =
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usbd_device_device_descriptor (device, port))) {
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return -1;
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}
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/*dbg_ep0(2, "%d %d", index, device_descriptor->bNumConfigurations); */
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if (index >= device_descriptor->bNumConfigurations) {
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dbg_ep0 (0, "index too large: %d >= %d", index,
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device_descriptor->
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bNumConfigurations);
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return -1;
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}
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if (!
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(configuration_descriptor =
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usbd_device_configuration_descriptor (device,
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port,
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index))) {
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dbg_ep0 (0,
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"usbd_device_configuration_descriptor failed: %d",
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index);
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return -1;
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}
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dbg_ep0(0, "attempt to copy %d bytes to urb\n",cpu_to_le16(configuration_descriptor->wTotalLength));
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copy_config (urb, configuration_descriptor,
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cpu_to_le16(configuration_descriptor->wTotalLength),
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max);
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}
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break;
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case USB_DESCRIPTOR_TYPE_STRING:
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{
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struct usb_string_descriptor *string_descriptor;
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if (!(string_descriptor = usbd_get_string (index))) {
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serial_printf("Invalid string index %d\n", index);
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return -1;
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}
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dbg_ep0(3, "string_descriptor: %p length %d", string_descriptor, string_descriptor->bLength);
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copy_config (urb, string_descriptor, string_descriptor->bLength, max);
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}
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break;
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case USB_DESCRIPTOR_TYPE_INTERFACE:
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serial_printf("USB_DESCRIPTOR_TYPE_INTERFACE - error not implemented\n");
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return -1;
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case USB_DESCRIPTOR_TYPE_ENDPOINT:
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serial_printf("USB_DESCRIPTOR_TYPE_ENDPOINT - error not implemented\n");
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return -1;
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case USB_DESCRIPTOR_TYPE_HID:
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{
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serial_printf("USB_DESCRIPTOR_TYPE_HID - error not implemented\n");
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return -1; /* unsupported at this time */
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#if 0
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int bNumInterface =
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le16_to_cpu (urb->device_request.wIndex);
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int bAlternateSetting = 0;
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int class = 0;
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struct usb_class_descriptor *class_descriptor;
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if (!(class_descriptor =
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usbd_device_class_descriptor_index (device,
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port, 0,
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bNumInterface,
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bAlternateSetting,
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class))
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|| class_descriptor->descriptor.hid.bDescriptorType != USB_DT_HID) {
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dbg_ep0 (3, "[%d] interface is not HID",
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bNumInterface);
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return -1;
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}
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/* copy descriptor for this class */
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copy_config (urb, class_descriptor,
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class_descriptor->descriptor.hid.bLength,
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max);
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#endif
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}
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break;
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case USB_DESCRIPTOR_TYPE_REPORT:
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{
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serial_printf("USB_DESCRIPTOR_TYPE_REPORT - error not implemented\n");
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return -1; /* unsupported at this time */
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#if 0
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int bNumInterface =
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le16_to_cpu (urb->device_request.wIndex);
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int bAlternateSetting = 0;
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int class = 0;
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struct usb_class_report_descriptor *report_descriptor;
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if (!(report_descriptor =
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usbd_device_class_report_descriptor_index
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(device, port, 0, bNumInterface,
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bAlternateSetting, class))
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|| report_descriptor->bDescriptorType !=
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USB_DT_REPORT) {
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dbg_ep0 (3, "[%d] descriptor is not REPORT",
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bNumInterface);
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return -1;
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}
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/* copy report descriptor for this class */
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/*copy_config(urb, &report_descriptor->bData[0], report_descriptor->wLength, max); */
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if (max - urb->actual_length > 0) {
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int length =
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MIN (report_descriptor->wLength,
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max - urb->actual_length);
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memcpy (urb->buffer + urb->actual_length,
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&report_descriptor->bData[0], length);
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urb->actual_length += length;
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}
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#endif
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}
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break;
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case USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER:
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{
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/* If a USB device supports both a full speed and low speed operation
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* we must send a Device_Qualifier descriptor here
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*/
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return -1;
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}
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default:
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return -1;
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}
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dbg_ep0 (1, "urb: buffer: %p buffer_length: %2d actual_length: %2d tx_packetSize: %2d",
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urb->buffer, urb->buffer_length, urb->actual_length,
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device->bus->endpoint_array[0].tx_packetSize);
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/*
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if ((urb->actual_length < max) && !(urb->actual_length % device->bus->endpoint_array[0].tx_packetSize)) {
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dbg_ep0(0, "adding null byte");
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urb->buffer[urb->actual_length++] = 0;
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dbg_ep0(0, "urb: buffer_length: %2d actual_length: %2d packet size: %2d",
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urb->buffer_length, urb->actual_length device->bus->endpoint_array[0].tx_packetSize);
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}
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*/
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return 0;
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}
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/**
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* ep0_recv_setup - called to indicate URB has been received
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* @urb: pointer to struct urb
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*
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* Check if this is a setup packet, process the device request, put results
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* back into the urb and return zero or non-zero to indicate success (DATA)
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* or failure (STALL).
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*
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*/
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int ep0_recv_setup (struct urb *urb)
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{
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/*struct usb_device_request *request = urb->buffer; */
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/*struct usb_device_instance *device = urb->device; */
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struct usb_device_request *request;
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struct usb_device_instance *device;
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int address;
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dbg_ep0 (0, "entering ep0_recv_setup()");
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if (!urb || !urb->device) {
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dbg_ep0 (3, "invalid URB %p", urb);
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return -1;
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}
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request = &urb->device_request;
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device = urb->device;
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dbg_ep0 (3, "urb: %p device: %p", urb, urb->device);
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/*dbg_ep0(2, "- - - - - - - - - -"); */
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dbg_ep0 (2,
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"bmRequestType:%02x bRequest:%02x wValue:%04x wIndex:%04x wLength:%04x %s",
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request->bmRequestType, request->bRequest,
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le16_to_cpu (request->wValue), le16_to_cpu (request->wIndex),
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le16_to_cpu (request->wLength),
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USBD_DEVICE_REQUESTS (request->bRequest));
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/* handle USB Standard Request (c.f. USB Spec table 9-2) */
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if ((request->bmRequestType & USB_REQ_TYPE_MASK) != 0) {
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if(device->device_state <= STATE_CONFIGURED){
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/* Attempt to handle a CDC specific request if we are
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* in the configured state.
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*/
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return device->cdc_recv_setup(request,urb);
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}
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dbg_ep0 (1, "non standard request: %x",
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request->bmRequestType & USB_REQ_TYPE_MASK);
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return -1; /* Stall here */
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}
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switch (device->device_state) {
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case STATE_CREATED:
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case STATE_ATTACHED:
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case STATE_POWERED:
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/* It actually is important to allow requests in these states,
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* Windows will request descriptors before assigning an
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* address to the client.
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*/
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/*dbg_ep0 (1, "request %s not allowed in this state: %s", */
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/* USBD_DEVICE_REQUESTS(request->bRequest), */
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/* usbd_device_states[device->device_state]); */
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/*return -1; */
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break;
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case STATE_INIT:
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case STATE_DEFAULT:
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switch (request->bRequest) {
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case USB_REQ_GET_STATUS:
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case USB_REQ_GET_INTERFACE:
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case USB_REQ_SYNCH_FRAME: /* XXX should never see this (?) */
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case USB_REQ_CLEAR_FEATURE:
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case USB_REQ_SET_FEATURE:
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case USB_REQ_SET_DESCRIPTOR:
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/* case USB_REQ_SET_CONFIGURATION: */
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case USB_REQ_SET_INTERFACE:
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dbg_ep0 (1,
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"request %s not allowed in DEFAULT state: %s",
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USBD_DEVICE_REQUESTS (request->bRequest),
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usbd_device_states[device->device_state]);
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return -1;
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case USB_REQ_SET_CONFIGURATION:
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case USB_REQ_SET_ADDRESS:
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case USB_REQ_GET_DESCRIPTOR:
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case USB_REQ_GET_CONFIGURATION:
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break;
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}
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case STATE_ADDRESSED:
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case STATE_CONFIGURED:
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break;
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case STATE_UNKNOWN:
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dbg_ep0 (1, "request %s not allowed in UNKNOWN state: %s",
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USBD_DEVICE_REQUESTS (request->bRequest),
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usbd_device_states[device->device_state]);
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return -1;
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}
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/* handle all requests that return data (direction bit set on bm RequestType) */
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if ((request->bmRequestType & USB_REQ_DIRECTION_MASK)) {
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dbg_ep0 (3, "Device-to-Host");
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switch (request->bRequest) {
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case USB_REQ_GET_STATUS:
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return ep0_get_status (device, urb, request->wIndex,
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request->bmRequestType &
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USB_REQ_RECIPIENT_MASK);
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case USB_REQ_GET_DESCRIPTOR:
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return ep0_get_descriptor (device, urb,
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le16_to_cpu (request->wLength),
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le16_to_cpu (request->wValue) >> 8,
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le16_to_cpu (request->wValue) & 0xff);
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case USB_REQ_GET_CONFIGURATION:
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serial_printf("get config %d\n", device->configuration);
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return ep0_get_one (device, urb,
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device->configuration);
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case USB_REQ_GET_INTERFACE:
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return ep0_get_one (device, urb, device->alternate);
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case USB_REQ_SYNCH_FRAME: /* XXX should never see this (?) */
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return -1;
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case USB_REQ_CLEAR_FEATURE:
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case USB_REQ_SET_FEATURE:
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case USB_REQ_SET_ADDRESS:
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case USB_REQ_SET_DESCRIPTOR:
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case USB_REQ_SET_CONFIGURATION:
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case USB_REQ_SET_INTERFACE:
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return -1;
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}
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}
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/* handle the requests that do not return data */
|
|
else {
|
|
|
|
|
|
/*dbg_ep0(3, "Host-to-Device"); */
|
|
switch (request->bRequest) {
|
|
|
|
case USB_REQ_CLEAR_FEATURE:
|
|
case USB_REQ_SET_FEATURE:
|
|
dbg_ep0 (0, "Host-to-Device");
|
|
switch (request->
|
|
bmRequestType & USB_REQ_RECIPIENT_MASK) {
|
|
case USB_REQ_RECIPIENT_DEVICE:
|
|
/* XXX DEVICE_REMOTE_WAKEUP or TEST_MODE would be added here */
|
|
/* XXX fall through for now as we do not support either */
|
|
case USB_REQ_RECIPIENT_INTERFACE:
|
|
case USB_REQ_RECIPIENT_OTHER:
|
|
dbg_ep0 (0, "request %s not",
|
|
USBD_DEVICE_REQUESTS (request->bRequest));
|
|
default:
|
|
return -1;
|
|
|
|
case USB_REQ_RECIPIENT_ENDPOINT:
|
|
dbg_ep0 (0, "ENDPOINT: %x", le16_to_cpu (request->wValue));
|
|
if (le16_to_cpu (request->wValue) == USB_ENDPOINT_HALT) {
|
|
/*return usbd_device_feature (device, le16_to_cpu (request->wIndex), */
|
|
/* request->bRequest == USB_REQ_SET_FEATURE); */
|
|
/* NEED TO IMPLEMENT THIS!!! */
|
|
return -1;
|
|
} else {
|
|
dbg_ep0 (1, "request %s bad wValue: %04x",
|
|
USBD_DEVICE_REQUESTS
|
|
(request->bRequest),
|
|
le16_to_cpu (request->wValue));
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
case USB_REQ_SET_ADDRESS:
|
|
/* check if this is a re-address, reset first if it is (this shouldn't be possible) */
|
|
if (device->device_state != STATE_DEFAULT) {
|
|
dbg_ep0 (1, "set_address: %02x state: %s",
|
|
le16_to_cpu (request->wValue),
|
|
usbd_device_states[device->device_state]);
|
|
return -1;
|
|
}
|
|
address = le16_to_cpu (request->wValue);
|
|
if ((address & 0x7f) != address) {
|
|
dbg_ep0 (1, "invalid address %04x %04x",
|
|
address, address & 0x7f);
|
|
return -1;
|
|
}
|
|
device->address = address;
|
|
|
|
/*dbg_ep0(2, "address: %d %d %d", */
|
|
/* request->wValue, le16_to_cpu(request->wValue), device->address); */
|
|
|
|
return 0;
|
|
|
|
case USB_REQ_SET_DESCRIPTOR: /* XXX should we support this? */
|
|
dbg_ep0 (0, "set descriptor: NOT SUPPORTED");
|
|
return -1;
|
|
|
|
case USB_REQ_SET_CONFIGURATION:
|
|
/* c.f. 9.4.7 - the top half of wValue is reserved */
|
|
device->configuration = le16_to_cpu(request->wValue) & 0xff;
|
|
|
|
/* reset interface and alternate settings */
|
|
device->interface = device->alternate = 0;
|
|
|
|
/*dbg_ep0(2, "set configuration: %d", device->configuration); */
|
|
/*serial_printf("DEVICE_CONFIGURED.. event?\n"); */
|
|
return 0;
|
|
|
|
case USB_REQ_SET_INTERFACE:
|
|
device->interface = le16_to_cpu (request->wIndex);
|
|
device->alternate = le16_to_cpu (request->wValue);
|
|
/*dbg_ep0(2, "set interface: %d alternate: %d", device->interface, device->alternate); */
|
|
serial_printf ("DEVICE_SET_INTERFACE.. event?\n");
|
|
return 0;
|
|
|
|
case USB_REQ_GET_STATUS:
|
|
case USB_REQ_GET_DESCRIPTOR:
|
|
case USB_REQ_GET_CONFIGURATION:
|
|
case USB_REQ_GET_INTERFACE:
|
|
case USB_REQ_SYNCH_FRAME: /* XXX should never see this (?) */
|
|
return -1;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|