lpc214x_usbdev.c

/*******************************************************************************
 * arch/arm/src/lpc214x/lpc214x_usbdev.c
 *
 *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 *******************************************************************************/

/*******************************************************************************
 * Included Files
 *******************************************************************************/

#include <nuttx/config.h>
#include <sys/types.h>

#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <queue.h>
#include <debug.h>

#include <nuttx/arch.h>
#include <nuttx/usb.h>
#include <nuttx/usbdev.h>
#include <nuttx/usbdev_trace.h>

#include <arch/irq.h>
#include <arch/board/board.h>

#include "up_arch.h"
#include "up_internal.h"
#include "lpc214x_usbdev.h"
#include "lpc214x_power.h"

/*******************************************************************************
 * Definitions
 *******************************************************************************/

/* Configuration ***************************************************************/

#ifndef CONFIG_USBDEV_EP0_MAXSIZE
#  define CONFIG_USBDEV_EP0_MAXSIZE 64
#endif

#ifndef  CONFIG_USBDEV_MAXPOWER
#  define CONFIG_USBDEV_MAXPOWER 100  /* mA */
#endif

#define USB_SLOW_INT USBDEV_DEVINT_EPSLOW
#define USB_DEVSTATUS_INT USBDEV_DEVINT_DEVSTAT

#ifdef CONFIG_LPC214X_USBDEV_EPFAST_INTERRUPT
#  define USB_FAST_INT USBDEV_DEVINT_EPFAST
#else
#  define USB_FAST_INT 0
#endif

/* Enable reading SOF from interrupt handler vs. simply reading on demand.  Probably
 * a bad idea... Unless there is some issue with sampling the SOF from hardware
 * asynchronously.
 */

#ifdef CONFIG_LPC214X_USBDEV_FRAME_INTERRUPT
#  define USB_FRAME_INT USBDEV_DEVINT_FRAME
#else
#  define USB_FRAME_INT 0
#endif

#ifdef CONFIG_DEBUG
#  define USB_ERROR_INT USBDEV_DEVINT_EPRINT
#else
#  define USB_ERROR_INT 0
#endif

/* Number of DMA descriptors */

#ifdef CONFIG_LPC214X_USBDEV_DMA
# error DMA SUPPORT NOT YET FULLY IMPLEMENTED
#  ifndef CONFIG_LPC214X_USBDEV_NDMADESCRIPTORS
#    define CONFIG_LPC214X_USBDEV_NDMADESCRIPTORS 8
#  elif CONFIG_LPC214X_USBDEV_NDMADESCRIPTORS > 30
#    define CONFIG_LPC214X_USBDEV_NDMADESCRIPTORS 30
#  endif
#endif

/* Debug ***********************************************************************/

#ifndef CONFIG_USBDEV_TRACE
#  undef usbtrace
#  define usbtrace(a,b) udbg("%04x:%04x\n", a, b)
#endif

/* Trace error codes */

#define LPC214X_TRACEERR_ALLOCFAIL        0x0001
#define LPC214X_TRACEERR_BADEPNO          0x0002
#define LPC214X_TRACEERR_BADEPTYPE        0x0003
#define LPC214X_TRACEERR_BADREQUEST       0x0004
#define LPC214X_TRACEERR_BINDFAILED       0x0005
#define LPC214X_TRACEERR_DMABUSY          0x0006
#define LPC214X_TRACEERR_DRIVER           0x0007
#define LPC214X_TRACEERR_DRIVERREGISTERED 0x0008
#define LPC214X_TRACEERR_EPREAD           0x0009
#define LPC214X_TRACEERR_INVALIDPARMS     0x000a
#define LPC214X_TRACEERR_IRQREGISTRATION  0x000b
#define LPC214X_TRACEERR_NODMADESC        0x000c
#define LPC214X_TRACEERR_NOEP             0x000d
#define LPC214X_TRACEERR_NOTCONFIGURED    0x000e
#define LPC214X_TRACEERR_NULLPACKET       0x000f
#define LPC214X_TRACEERR_NULLREQUEST      0x0010
#define LPC214X_TRACEERR_STALLED          0x0011

/* Trace interrupt codes */

#define LPC214X_TRACEINTID_USB            0x0001
#define LPC214X_TRACEINTID_CLEARFEATURE   0x0002
#define LPC214X_TRACEINTID_CONNECTCHG     0x0003
#define LPC214X_TRACEINTID_CONNECTED      0x0004
#define LPC214X_TRACEINTID_DEVGETSTATUS   0x0005
#define LPC214X_TRACEINTID_DEVRESET       0x0006
#define LPC214X_TRACEINTID_DEVSTAT        0x0007
#define LPC214X_TRACEINTID_DISCONNECTED   0x0008
#define LPC214X_TRACEINTID_DISPATCH       0x0009
#define LPC214X_TRACEINTID_EP0IN          0x000a
#define LPC214X_TRACEINTID_EP0OUT         0x000b
#define LPC214X_TRACEINTID_EP0SETUP       0x000c
#define LPC214X_TRACEINTID_EPDMA          0x000d
#define LPC214X_TRACEINTID_EPFAST         0x000e
#define LPC214X_TRACEINTID_EPGETSTATUS    0x000f
#define LPC214X_TRACEINTID_EPIN           0x0010
#define LPC214X_TRACEINTID_EPOUT          0x0011
#define LPC214X_TRACEINTID_EPRINT         0x0012
#define LPC214X_TRACEINTID_EPSLOW         0x0013
#define LPC214X_TRACEINTID_FRAME          0x0014
#define LPC214X_TRACEINTID_IFGETSTATUS    0x0015
#define LPC214X_TRACEINTID_SETADDRESS     0x0017
#define LPC214X_TRACEINTID_SETFEATURE     0x0018
#define LPC214X_TRACEINTID_SUSPENDCHG     0x0019

/* Hardware interface **********************************************************/

/* Macros for testing the device status response */

#define DEVSTATUS_CONNECT(s)    (((s)&USBDEV_DEVSTATUS_CONNECT)!=0)
#define DEVSTATUS_CONNCHG(s)    (((s)&USBDEV_DEVSTATUS_CONNCHG)!=0)
#define DEVSTATUS_SUSPEND(s)    (((s)&USBDEV_DEVSTATUS_SUSPEND)!=0)
#define DEVSTATUS_SUSPCHG(s)    (((s)&USBDEV_DEVSTATUS_SUSPCHG)!=0)
#define DEVSTATUS_RESET(s)      (((s)&USBDEV_DEVSTATUS_RESET)!=0)

/* If this bit is set in the lpc214x_epread response, it means that the
 * recevied packet was overwritten by a later setup packet (ep0 only).
 */

#define LPC214X_READOVERRUN_BIT (0x80000000)
#define LPC214X_READOVERRUN(s)  (((s) & LPC214X_READOVERRUN_BIT) != 0)

/* USB RAM  ********************************************************************
 *
 * UBS_UDCA is is list of 32 pointers to DMA desciptors located at the
 * beginning of USB RAM.  Each pointer points to a DMA descriptor with
 * assocated DMA buffer.
 */

#define USB_UDCA           (uint32*)LPC214X_USBDEV_RAMBASE)
#define USB_USCASIZE       (LPC214X_NPHYSENDPOINTS*sizeof(uint32))

/* Each descriptor must be aligned to a 128 address boundary */

#define USB_DDALIGNDOWN(a) ((a)&~0x7f)
#define USB_DDALIGNUP(a)   USB_DDALIGNDOWN((a)+0x7f)

#define USB_DDSIZE USB_DDALIGNDOWN((LPC214X_USBDEV_RAMSIZE-USB_USCASIZE)/CONFIG_LPC214X_USBDEV_NDMADESCRIPTORS)
#define USB_DDESC  ((struct lpc214x_dmadesc_s*)(LPC214X_USBDEV_RAMBASE+USB_USCASIZE))