/*******************************************************************************
* 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))
#ifdef CONFIG_USBDEV_ISOCHRONOUS
# define USB_DDESCSIZE (5*sizeof(uint32))
#else
# define USB_DDESCSIZE (4*sizeof(uint32))
#endif
/* Endpoints ******************************************************************/
/* Number of endpoints */
#define LPC214X_NLOGENDPOINTS (16) /* ep0-15 */
#define LPC214X_NPHYSENDPOINTS (32) /* x2 for IN and OUT */
/* Mapping to more traditional endpoint numbers */
#define LPC214X_EP_LOG2PHYOUT(ep) ((ep)&0x0f)<<1))
#define LPC214X_EP_LOG2PHYIN(ep) (LPC214X_EP_OUT(ep)|0x01)
#define LPC214X_EP_LOG2PHY(ep) ((((ep)&0x0f)<<1)|(((ep)&0x80)>>7))
/* Each endpoint has somewhat different characteristics */
#define LPC214X_EPALLSET (0xffffffff) /* All endpoints */
#define LPC214X_EPOUTSET (0x55555555) /* Even phy endpoint numbers are OUT EPs */
#define LPC214X_EPINSET (0xaaaaaaaa) /* Odd endpoint numbers are IN EPs */
#define LPC214X_EPCTRLSET (0x00000003) /* EP0 IN/OUT are control endpoints */
#define LPC214X_EPINTRSET (0x0c30c30c) /* Interrupt endpoints */
#define LPC214X_EPBULKSET (0xf0c30c30) /* Bulk endpoints */
#define LPC214X_EPISOCSET (0x030c30c0) /* Isochronous endpoints */
#define LPC214X_EP0MAXPACKET (64) /* EP0 max packet size */
#define LPC214X_BULKMAXPACKET (64) /* Bulk endpoint max packet */
#define LPC214X_INTRMAXPACKET (64) /* Interrupt endpoint max packet */
/* EP0 status */
#define LPC214X_EP0IDLE (0) /* Nothing in progress */
#define LPC214X_EP0STATUSIN (1) /* Status sent */
#define LPC214X_EP0STATUSOUT (2) /* Status received */
#define LPC214X_EP0SHORTWRITE (3) /* Short data sent with no request */
#define LPC214X_EP0SHORTWRSENT (4) /* Short data write complete */
#define LPC214X_EP0SETADDRESS (5) /* Set address received */
/*******************************************************************************
* Private Types
*******************************************************************************/
/* A container for a request so that the request make be retained in a list */
struct lpc214x_req_s
{
struct usbdev_req_s req; /* Standard USB request */
sq_entry_t sqe; /* Supports a singly linked list */
};
/* This is the internal representation of an endpoint */
struct lpc214x_ep_s
{
/* Common endpoint fields. This must be the first thing defined in the
* structure so that it is possible to simply cast from struct usbdev_ep_s
* to struct lpc214x_ep_s.
*/
struct usbdev_ep_s ep; /* Standard endpoint structure */
/* LPC214X-specific fields */
struct lpc214x_usbdev_s *dev; /* Reference to private driver data */
sq_queue_t reqlist; /* Request list for this endpoint */
ubyte eplog; /* Logical EP address from descriptor */
ubyte epphy; /* Physical EP address */
ubyte stalled:1; /* Endpoint is halted */
ubyte in:1; /* Endpoint is IN only */
ubyte halted:1; /* Endport feature halted */
};
/* This represents a DMA descriptor */
#ifdef CONFIG_LPC214X_USBDEV_DMA
struct lpc214x_dmadesc_s
{
uint32 nextdesc; /* Address of the next DMA descripto in RAM */
uint32 config; /* Misc. bit encoded configuration information */
uint32 start; /* DMA start address */
uint32 status; /* Misc. bit encoded status inforamation */
#ifdef CONFIG_USBDEV_ISOCHRONOUS
uint32 size; /* Isochronous packet size address */
#endif
ubyte buffer[USB_DDSIZE-USB_DDESCSIZE];
};
#endif
/* This structure retains the state of the USB device controller */
struct lpc214x_usbdev_s
{
/* Common device fields. This must be the first thing defined in the
* structure so that it is possible to simply cast from struct usbdev_s
* to structlpc214x_usbdev_s.
*/
struct usbdev_s usbdev;
/* The bound device class driver */
struct usbdevclass_driver_s *driver;
/* LPC214X-specific fields */
ubyte devstatus; /* Last response to device status command */
ubyte ep0state; /* State of certain EP0 operations */
ubyte stalled:1; /* 1: Protocol stalled */
ubyte selfpowered:1; /* 1: Device is self powered */
ubyte paddrset:1; /* 1: Peripheral addr has been set */
ubyte attached:1; /* 1: Host attached */
ubyte rxpending:1; /* 1: RX pending */
uint32 epavail; /* Available endpoints */
uint32 softprio; /* Bitset of high priority interrupts */
uint32 wravail; /* Bitset of available endpoints */
#ifdef CONFIG_LPC214X_USBDEV_FRAME_INTERRUPT
uint32 sof; /* Last start-of-frame */
#endif
/* Allocated DMA descriptor */
#ifdef CONFIG_LPC214X_USBDEV_DMA
struct lpc214x_dmadesc_s *dmadesc;
#endif
/* The endpoint list */
struct lpc214x_ep_s eplist[LPC214X_NPHYSENDPOINTS];
};
/*******************************************************************************
* Private Function Prototypes
*******************************************************************************/
/* Command operations */
static uint32 lpc214x_usbcmd(uint16 cmd, ubyte data);
/* Low level data transfers and request operations */
static void lpc214x_epwrite(ubyte epphy, const ubyte *data, uint32 nbytes);
static int lpc214x_epread(ubyte epphy, ubyte *data, uint32 nbytes);
static void lpc214x_reqcomplete(struct lpc214x_ep_s *privep, sint16 result);
static int lpc214x_wrrequest(struct lpc214x_ep_s *privep);
static int lpc214x_rdrequest(struct lpc214x_ep_s *privep);
static void lpc214x_cancelrequests(struct lpc214x_ep_s *privep);
/* Interrupt handling */
static void lpc214x_eprealize(struct lpc214x_ep_s *privep, boolean prio, uint32 packetsize);
static ubyte lpc214x_epclrinterrupt(ubyte epphy);
static inline void lpc214x_ep0configure(struct lpc214x_usbdev_s *priv);
#ifdef CONFIG_LPC214X_USBDEV_DMA
static inline void lpc214x_dmareset(uint32 enable);
#endif
static void lpc214x_usbreset(struct lpc214x_usbdev_s *priv);
static void lpc214x_dispatchrequest(struct lpc214x_usbdev_s *priv,
const struct usb_ctrlreq_s *req);
static inline void lpc214x_ep0setup(struct lpc214x_usbdev_s *priv);
static inline void lpc214x_ep0dataoutinterrupt(struct lpc214x_usbdev_s *priv);
static inline void lpc214x_ep0dataininterrupt(struct lpc214x_usbdev_s *priv);
static int lpc214x_usbinterrupt(int irq, FAR void *context);
#ifdef CONFIG_LPC214X_USBDEV_DMA
static int lpc214x_dmasetup(struct lpc214x_usbdev_s *priv, ubyte epphy,
uint32 epmaxsize, uint32 nbytes, uint32 *isocpacket,
boolean isochronous);
static void lpc214x_dmarestart(ubyte epphy, uint32 descndx);
static void lpc214x_dmadisable(ubyte epphy);
#endif /* CONFIG_LPC214X_USBDEV_DMA */
/* Endpoint operations */
static int lpc214x_epconfigure(FAR struct usbdev_ep_s *ep,
const struct usb_epdesc_s *desc);
static int lpc214x_epdisable(FAR struct usbdev_ep_s *ep);
static FAR struct usbdev_req_s *lpc214x_epallocreq(FAR struct usbdev_ep_s *ep);
static void lpc214x_epfreereq(FAR struct usbdev_ep_s *ep,
FAR struct usbdev_req_s *);
#ifdef CONFIG_LPC214X_USBDEV_DMA
static FAR void *lpc214x_epallocbuffer(FAR struct usbdev_ep_s *ep,
uint16 nbytes);
static void lpc214x_epfreebuffer(FAR struct usbdev_ep_s *ep, void *buf);
#endif
static int lpc214x_epsubmit(FAR struct usbdev_ep_s *ep,
struct usbdev_req_s *req);
static int lpc214x_epcancel(FAR struct usbdev_ep_s *ep,
struct usbdev_req_s *req);
static int lpc214x_epstall(FAR struct usbdev_ep_s *ep, boolean resume);
/* USB device controller operations */
static FAR struct usbdev_ep_s *lcp214x_allocep(FAR struct usbdev_s *dev,
ubyte epno, boolean in, ubyte eptype);
static void lpc214x_freeep(FAR struct usbdev_s *dev, FAR struct usbdev_ep_s *ep);
static int lpc214x_getframe(struct usbdev_s *dev);
static int lpc214x_wakeup(struct usbdev_s *dev);
static int lpc214x_selfpowered(struct usbdev_s *dev, boolean selfpowered);
static int lpc214x_pullup(struct usbdev_s *dev, boolean enable);
/*******************************************************************************
* Private Data
*******************************************************************************/
/* Since there is only a single USB interface, all status information can be
* be simply retained in a single global instance.
*/
static struct lpc214x_usbdev_s g_usbdev;
static const struct usbdev_epops_s g_epops =
{
.configure = lpc214x_epconfigure,
.disable = lpc214x_epdisable,
.allocreq = lpc214x_epallocreq,
.freereq = lpc214x_epfreereq,
#ifdef CONFIG_LPC214X_USBDEV_DMA
.allocbuffer = lpc214x_epallocbuffer,
.freebuffer = lpc214x_epfreebuffer,
#endif
.submit = lpc214x_epsubmit,
.cancel = lpc214x_epcancel,
.stall = lpc214x_epstall,
};
static const struct usbdev_ops_s g_devops =
{
.allocep = lcp214x_allocep,
.freeep = lpc214x_freeep,
.getframe = lpc214x_getframe,
.wakeup = lpc214x_wakeup,
.selfpowered = lpc214x_selfpowered,
.pullup = lpc214x_pullup,
};
/*******************************************************************************
* Public Data
*******************************************************************************/
/*******************************************************************************
* Private Functions
*******************************************************************************/
/*******************************************************************************
* Name: lpc214x_usbcmd
*
* Description:
* Transmit commands to the USB engine
*
*******************************************************************************/
static uint32 lpc214x_usbcmd(uint16 cmd, ubyte data)
{
irqstate_t flags;
uint32 tmp = 0;
/* Disable interrupt and clear CDFULL and CCEMPTY interrupt status */
flags = irqsave();
putreg32(USBDEV_DEVINT_CDFULL|USBDEV_DEVINT_CCEMTY, LPC214X_USBDEV_DEVINTCLR);
/* Load commonad in USB engine */
putreg32(((cmd & 0xff) << 16) + CMD_USB_CMDWR, LPC214X_USBDEV_CMDCODE);
/* Wait until command is accepted */
while ((getreg32(LPC214X_USBDEV_DEVINTST) & USBDEV_DEVINT_CCEMTY) == 0);
/* Clear command register empty (CCEMPTY) interrupt */
putreg32(USBDEV_DEVINT_CCEMTY, LPC214X_USBDEV_DEVINTCLR);
/* determinate next phase of the command */
switch (cmd)
{
case CMD_USB_DEV_SETADDRESS:
case CMD_USB_DEV_CONFIG:
case CMD_USB_DEV_SETMODE:
case CMD_USB_DEV_SETSTATUS:
putreg32((data << 16) + CMD_USB_DATAWR, LPC214X_USBDEV_CMDCODE);
while ((getreg32(LPC214X_USBDEV_DEVINTST) & USBDEV_DEVINT_CCEMTY) == 0);
break;
case CMD_USB_DEV_READFRAMENO:
case CMD_USB_DEV_READTESTREG:
putreg32((cmd << 16) + CMD_USB_DATARD, LPC214X_USBDEV_CMDCODE);
while ((getreg32(LPC214X_USBDEV_DEVINTST) & USBDEV_DEVINT_CDFULL) == 0);
putreg32(USBDEV_DEVINT_CDFULL, LPC214X_USBDEV_DEVINTCLR);
tmp = getreg32(LPC214X_USBDEV_CMDDATA);
putreg32((cmd << 16) + CMD_USB_DATARD, LPC214X_USBDEV_CMDCODE);
while ((getreg32(LPC214X_USBDEV_DEVINTST) & USBDEV_DEVINT_CDFULL) == 0);
tmp |= getreg32(LPC214X_USBDEV_CMDDATA) << 8;
break;
case CMD_USB_DEV_GETSTATUS:
case CMD_USB_DEV_GETERRORCODE:
case CMD_USB_DEV_READERRORSTATUS:
case CMD_USB_EP_CLRBUFFER:
putreg32((cmd << 16) + CMD_USB_DATARD, LPC214X_USBDEV_CMDCODE);
while ((getreg32(LPC214X_USBDEV_DEVINTST) & USBDEV_DEVINT_CDFULL) == 0);
tmp = getreg32(LPC214X_USBDEV_CMDDATA);
break;
default:
switch (cmd & 0x1e0)
{
case CMD_USB_EP_SELECT:
case CMD_USB_EP_SELECTCLEAR:
putreg32((cmd << 16) + CMD_USB_DATARD, LPC214X_USBDEV_CMDCODE);
while ((getreg32(LPC214X_USBDEV_DEVINTST) & USBDEV_DEVINT_CDFULL) == 0);
tmp = getreg32(LPC214X_USBDEV_CMDDATA);
break;
case CMD_USB_EP_SETSTATUS:
putreg32((data << 16) + CMD_USB_DATAWR, LPC214X_USBDEV_CMDCODE);
while ((getreg32(LPC214X_USBDEV_DEVINTST) & USBDEV_DEVINT_CCEMTY) == 0);
break;
}
break;
}
/* Restore the interrupt flags */
irqrestore(flags);
return tmp;
}
/*******************************************************************************
* Name: lpc214x_epwrite
*
* Description:
* Endpoint write (IN)
*
*******************************************************************************/
static void lpc214x_epwrite(ubyte epphy, const ubyte *data, uint32 nbytes)
{
/* Set the write enable bit for this physical EP address */
putreg32(((epphy << 1) & LPC214X_USBCTRL_EPMASK) | LPC214X_USBCTRL_WREN,
LPC214X_USBDEV_CTRL);
/* Set the transmit packet length (nbytes must be less than 2048) */
putreg32(nbytes, LPC214X_USBDEV_TXPLEN);
/* Transfer the packet data */
do
{
/* Zero length packets are a special case */
if (nbytes)
{
putreg32(*data++, LPC214X_USBDEV_TXDATA);
}
else
{
/* Zero length packet */
putreg32(0, LPC214X_USBDEV_TXDATA);
}
}
while ((getreg32(LPC214X_USBDEV_CTRL) & LPC214X_USBCTRL_WREN) != 0);
/* Done */
putreg32(0, LPC214X_USBDEV_CTRL);
(void)lpc214x_usbcmd(CMD_USB_EP_SELECT | epphy, 0);
(void)lpc214x_usbcmd(CMD_USB_EP_VALIDATEBUFFER, 0);
}
/*******************************************************************************
* Name: lpc214x_epread
*
* Description:
* Endpoint read (OUT)
*
*******************************************************************************/
static int lpc214x_epread(ubyte epphy, ubyte *data, uint32 nbytes)
{
uint32 pktlen;
uint32 result;
uint32 value;
/* Set the read enable bit for this physical EP address */
putreg32(((epphy << 1) & LPC214X_USBCTRL_EPMASK) | LPC214X_USBCTRL_RDEN,
LPC214X_USBDEV_CTRL);
/* Wait for packet buffer ready for reading */
while ((getreg32(LPC214X_USBDEV_RXPLEN) & USBDEV_RXPLEN_PKTRDY) == 0);
/* Get the about of data to be read */
pktlen = getreg32(LPC214X_USBDEV_RXPLEN) & USBDEV_RXPLEN_PKTLENGTH;
/* Read data from input buffer while read data is valid (DV) */
while ((getreg32(LPC214X_USBDEV_RXPLEN) & USBDEV_RXPLEN_DV) != 0)
{
value = getreg32(LPC214X_USBDEV_RXDATA);
if (data)
{
*data++ = value;
}
}
/* Done */
putreg32(0, LPC214X_USBDEV_CTRL);
(void)lpc214x_usbcmd(CMD_USB_EP_SELECT | epphy, 0);
result = lpc214x_usbcmd(CMD_USB_EP_CLRBUFFER, 0);
/* The packet overrun bit in the clear buffer response is applicable only
* on EP0 transfers. If set it means that the recevied packet was overwritten
* by a later setup packet.
*/
if (epphy == LPC214X_EP0_OUT && (result & CMD_USB_CLRBUFFER_PO) != 0)
{
/* Pass this information in bit 31 */
pktlen |= LPC214X_READOVERRUN_BIT;
}
return pktlen;
}
/*******************************************************************************
* Name: lpc214x_reqcomplete
*
* Description:
* Handle termination of a request.
*
*******************************************************************************/
static void lpc214x_reqcomplete(struct lpc214x_ep_s *privep, sint16 result)
{
struct lpc214x_req_s *privreq;
int stalled = privep->stalled;
irqstate_t flags;
/* Remove the complete request at the head of the endpoint request list */
flags = irqsave();
privreq = (struct lpc214x_req_s *)sq_remfirst(&privep->reqlist);
irqrestore(flags);
if (privreq)
{
/* If endpoint 0, temporarily reflect the state of protocol stalled
* in the callback.
*/
if (privep->epphy == 0)
{
if (privep->dev->stalled)
{
privep->stalled = 1;
}
}
/* Save the result in the request structure */
privreq->req.result = result;
/* Callback to the request completion handler */
privreq->sqe.flink = NULL;
privreq->req.callback(&privep->ep, &privreq->req);
/* Restore the stalled indication */
privep->stalled = stalled;
}
}
/*******************************************************************************
* Name: lpc214x_wrrequest
*
* Description:
* Send from the next queued write request
*
* Returned Value:
* 0:not finished; 1:completed; <0:error
*
*******************************************************************************/
static int lpc214x_wrrequest(struct lpc214x_ep_s *privep)
{
struct lpc214x_req_s *privreq;
ubyte *buf;
int nbytes;
int bytesleft;
/* Check the request from the head of the endpoint request queue */
privreq = (struct lpc214x_req_s *)sq_peek(&privep->reqlist);
if (!privreq)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_NULLREQUEST), 0);
return OK;
}
bytesleft = privreq->req.len;
for (;;)
{
/* Send the next packet if (1) there are more bytes to be sent, or
* (2) the last packet was exactly maxpacketsize.
*/
usbtrace(TRACE_WRITE(privep->epphy), privreq->req.xfrd);
if (privreq->req.len >= privreq->req.xfrd)
{
/* Try to send maxpacketsize -- unless we don't have that many
* bytes to send.
*/
nbytes = privep->ep.maxpacket;
if (nbytes > bytesleft)
{
nbytes = bytesleft;
}
/* Send the largest number of bytes that we can in this packet */
buf = privreq->req.buf + privreq->req.xfrd;
lpc214x_epwrite(privep->epphy, buf, nbytes);
/* Update for the next time through the loop */
privreq->req.xfrd += nbytes;
bytesleft = privreq->req.len - privreq->req.xfrd;
}
/* If all of the bytes were sent (and the last packet was not full)
* then we are finished with the transfer)
*/
if (privreq->req.len < privreq->req.xfrd)
{
usbtrace(TRACE_COMPLETE(privep->epphy), privreq->req.xfrd);
lpc214x_reqcomplete(privep, OK);
return OK;
}
}
return OK; /* Won't get here */
}
/*******************************************************************************
* Name: lpc214x_rdrequest
*
* Description:
* Receive to the next queued read request
*
*******************************************************************************/
static int lpc214x_rdrequest(struct lpc214x_ep_s *privep)
{
struct lpc214x_req_s *privreq;
ubyte *buf;
int nbytesread;
/* Check the request from the head of the endpoint request queue */
privreq = (struct lpc214x_req_s *)sq_peek(&privep->reqlist);
if (!privreq)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_NULLREQUEST), 0);
return OK;
}
usbtrace(TRACE_READ(privep->epphy), privreq->req.xfrd);
for (;;)
{
/* Receive the next packet if (1) there are more bytes to be receive, or
* (2) the last packet was exactly maxpacketsize.
*/
buf = privreq->req.buf + privreq->req.xfrd;
nbytesread = lpc214x_epread(privep->epphy, buf, privep->ep.maxpacket);
if (nbytesread < 0)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_EPREAD), nbytesread);
return ERROR;
}
/* If the receive buffer is full or if the last packet was not full
* then we are finished with the transfer.
*/
privreq->req.xfrd += nbytesread;
if (privreq->req.len < privreq->req.xfrd || nbytesread < privep->ep.maxpacket)
{
usbtrace(TRACE_COMPLETE(privep->epphy), privreq->req.xfrd);
lpc214x_reqcomplete(privep, OK);
return OK;
}
}
return OK; /* Won't get here */
}
/*******************************************************************************
* Name: lpc214x_cancelrequests
*
* Description:
* Cancel all pending requests for an endpoint
*
*******************************************************************************/
static void lpc214x_cancelrequests(struct lpc214x_ep_s *privep)
{
while (!sq_empty(&privep->reqlist))
{
usbtrace(TRACE_COMPLETE(privep->epphy),
((struct lpc214x_req_s *)sq_peek(&privep->reqlist))->req.xfrd);
lpc214x_reqcomplete(privep, -ESHUTDOWN);
}
}
/*******************************************************************************
* Name: lpc214x_eprealize
*
* Description:
* Enable or disable an endpoint
*
*******************************************************************************/
static void lpc214x_eprealize(struct lpc214x_ep_s *privep, boolean prio, uint32 packetsize)
{
struct lpc214x_usbdev_s *priv = privep->dev;
uint32 mask;
uint32 reg;
/* Initialize endpoint software priority */
mask = 1 << privep->epphy;
if (prio)
{
priv->softprio = priv->softprio | mask;
}
else
{
priv->softprio = priv->softprio & ~mask;
}
/* Clear realize interrupt bit */
putreg32(USBDEV_DEVINT_EPRLZED, LPC214X_USBDEV_DEVINTCLR);
/* Realize the endpoint */
reg = getreg32(LPC214X_USBDEV_REEP);
reg |= (1 << privep->epphy);
putreg32(reg, LPC214X_USBDEV_REEP);
/* Set endpoint maximum packet size */
putreg(privep->epphy, LPC214X_USBDEV_EPIND);
putreg(packetsize, LPC214X_USBDEV_MAXPSIZE);
/* Wait for Realize complete */
while ((getreg32(LPC214X_USBDEV_DEVINTST) & USBDEV_DEVINT_EPRLZED) == 0);
/* Clear realize interrupt bit */
putreg32(USBDEV_DEVINT_EPRLZED,LPC214X_USBDEV_DEVINTCLR);
}
/*******************************************************************************
* Name: lpc214x_epclrinterrupt
*
* Description:
* Clear the EP interrupt flag and return the current EP status
*
*******************************************************************************/
static ubyte lpc214x_epclrinterrupt(ubyte epphy)
{
/* Clear the endpoint interrupt */
putreg32(1 << epphy, LPC214X_USBDEV_EPINTCLR);
/* Wait for data in the command data register */
while ((getreg32(LPC214X_USBDEV_DEVINTST) & USBDEV_DEVINT_CDFULL) == 0);
/* Return the value of the command data register */
return getreg32(LPC214X_USBDEV_CMDDATA);
}
/*******************************************************************************
* Name: lpc214x_ep0configure
*
* Description:
* Configure endpoint 0
*
*******************************************************************************/
static inline void lpc214x_ep0configure(struct lpc214x_usbdev_s *priv)
{
uint32 inten;
/* EndPoint 0 initialization */
lpc214x_eprealize(&priv->eplist[LPC214X_CTRLEP_OUT], 0, CONFIG_USBDEV_EP0_MAXSIZE);
lpc214x_eprealize(&priv->eplist[LPC214X_CTRLEP_IN], 1, CONFIG_USBDEV_EP0_MAXSIZE);
/* Enable EP0 interrupts (not DMA) */
inten = getreg32(LPC214X_USBDEV_EPINTEN);
inten |= 3; /* EP0 Rx and Tx */
putreg32(inten, LPC214X_USBDEV_EPINTEN);
}
/*******************************************************************************
* Name: lpc214x_dmareset
*
* Description: Reset USB DMA
*
*******************************************************************************/
#ifdef CONFIG_LPC214X_USBDEV_DMA
static inline void lpc214x_dmareset(uint32 enable)
{
int i;
/* Disable All DMA interrupts */
putreg32(0, LPC214X_USBDEV_DMAINTEN);
/* DMA Disable */
putreg32(0xffffffff, LPC214X_USBDEV_EPDMADIS);
/* DMA Request clear */
putreq32(0xffffffff, LPC214X_USBDEV_DMARCLR);
/* End of Transfer Interrupt Clear */
putreq32(0xffffffff, LPC214X_USBDEV_EOTINTCLR);
/* New DD Request Interrupt Clear */
putreq32(0xffffffff, LPC214X_USBDEV_NDDRINTCLR);
/* System Error Interrupt Clear */
putreq32(0xffffffff, LPC214X_USBDEV_SYSERRINTCLR);
/* Nullify all pointers in the UDCA */
for (i = 0; i < LPC214X_NPHYSENDPOINTS; ++i)
{
USB_UDCA[i] = NULL;
}
/* Set USB UDCA Head register */
putreg32((uint32)USB_UDCA, LPC214X_USBDEV_UDCAH);
/* Invalidate all DMA descriptors */
for (i = 0; i < CONFIG_LPC214X_USBDEV_NDMADESCRIPTORS; ++i)
{
memset(&USB_DDESC[i], 0, USB_DDESCSIZE);
}
/* Enable DMA interrupts */
putreg32(enable, LPC214X_USBDEV_DMAINTEN);
}
#endif
/*******************************************************************************
* Name: lpc214x_usbreset
*
* Description:
* Reset Usb engine
*
*******************************************************************************/
static void lpc214x_usbreset(struct lpc214x_usbdev_s *priv)
{
/* Disable all endpoint interrupts */
putreg32(0, LPC214X_USBDEV_EPINTEN);
/* Frame is Hp interrupt */
putreg32(1, LPC214X_USBDEV_DEVINTPRI);
/* Clear all pending interrupts */
putreg32(0xffffffff, LPC214X_USBDEV_EPINTCLR);
putreg32(0xffffffff, LPC214X_USBDEV_DEVINTCLR);
/* Periperhal address is needed */
priv->paddrset = 0;
/* Endpoints not yet configured */
lpc214x_usbcmd(CMD_USB_DEV_CONFIG, 0);
/* EndPoint 0 initialization */
lpc214x_ep0configure(priv);
#ifdef CONFIG_LPC214X_USBDEV_DMA
/* Enable End_of_Transfer_Interrupt and System_Error_Interrupt USB DMA
* interrupts
*/
lpc214x_dmareset(CONFIG_LPC214X_USBDEV_DMAINTMASK);
#endif
/* Enable Device interrupts */
putreg32(USB_SLOW_INT|USB_DEVSTATUS_INT|USB_FAST_INT|USB_FRAME_INT|USB_ERROR_INT,
LPC214X_USBDEV_DEVINTEN);
}
/*******************************************************************************
* Name: lpc214x_dispatchrequest
*
* Description:
* Provide unhandled setup actions to the class driver. This is logically part
* of the USB interrupt handler.
*
*******************************************************************************/
static void lpc214x_dispatchrequest(struct lpc214x_usbdev_s *priv,
const struct usb_ctrlreq_s *req)
{
int ret;
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_DISPATCH), 0);
if (priv && priv->driver)
{
ret = CLASS_SETUP(priv->driver, &priv->usbdev, req);
if (ret < 0)
{
/* Stall on failure */
priv->stalled = 1;
}
else
{
lpc214x_epwrite(LPC214X_EP0_IN, NULL, 0);
priv->ep0state = LPC214X_EP0SHORTWRITE;
}
}
}
/*******************************************************************************
* Name: lpc214x_ep0setup
*
* Description:
* USB Ctrl EP Setup Event. This is logically part of the USB interrupt
* handler.
*
*******************************************************************************/
static inline void lpc214x_ep0setup(struct lpc214x_usbdev_s *priv)
{
struct lpc214x_ep_s *ep0 = &priv->eplist[LPC214X_EP0_OUT];
struct lpc214x_req_s *privreq = (struct lpc214x_req_s *)sq_peek(&ep0->reqlist);
struct usb_ctrlreq_s req;
uint16 index;
ubyte epphy;
ubyte response[2];
int ret;
/* Starting a control request? */
if (priv->usbdev.speed == USB_SPEED_UNKNOWN)
{
priv->usbdev.speed = USB_SPEED_FULL;
lpc214x_usbcmd(CMD_USB_DEV_CONFIG, 1);
}
/* Terminate any pending requests */
while (!sq_empty(&ep0->reqlist))
{
sint16 result = OK;
if (privreq->req.xfrd != privreq->req.len)
{
result = -EPROTO;
}
usbtrace(TRACE_COMPLETE(ep0->epphy), privreq->req.xfrd);
lpc214x_reqcomplete(ep0, result);
}
/* Assume NOT stalled */
ep0->stalled = 0;
priv->stalled = 0;
/* Read EP0 data */
ret = lpc214x_epread(LPC214X_EP0_OUT, (ubyte*)&req, sizeof(struct usb_ctrlreq_s));
if (ret <= 0)
{
return;
}
/* Dispatch any non-standard requests */
ep0->in = (req.type & USB_DIR_IN) != 0;
if ((req.type & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_STANDARD)
{
lpc214x_dispatchrequest(priv, &req);
return;
}
/* Handle standard request. Pick off the things of interest to the
* USB device controller driver; pass what is left to the class driver
*/
switch (req.req)
{
case USB_REQ_GETSTATUS:
{
/* Length must be 2, from device, and value == 0 */
if (!priv->paddrset || GETUINT16(req.len) != 2 ||
(req.type & USB_REQ_DIR_IN) == 0 || GETUINT16(req.value) != 0)
{
priv->stalled = 1;
}
else
{
switch (req.type & USB_REQ_RECIPIENT_MASK)
{
case USB_REQ_RECIPIENT_ENDPOINT:
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EPGETSTATUS), 0);
epphy = USB_EPNO(GETUINT16(req.index)) << 1;
if (epphy < LPC214X_NPHYSENDPOINTS)
{
if ((lpc214x_usbcmd(CMD_USB_EP_SELECT|epphy, 0) & CMD_USB_EPSELECT_ST) != 0)
{
response[0] = 1; /* Stalled */
}
else
{
response[0] = 0; /* Not stalled */
}
response[1] = 0;
lpc214x_epwrite(LPC214X_EP0_IN, response, 2);
priv->ep0state = LPC214X_EP0SHORTWRITE;
}
else
{
priv->stalled = 1;
}
}
break;
case USB_REQ_RECIPIENT_DEVICE:
{
index = GETUINT16(req.index);
if (index == 0)
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_DEVGETSTATUS), 0);
/* Features: Remote Wakeup=YES; selfpowered=? */
response[0] = (priv->selfpowered << USB_FEATURE_SELFPOWERED) |
(1 << USB_FEATURE_REMOTEWAKEUP);
response[1] = 0;
lpc214x_epwrite(LPC214X_EP0_IN, response, 2);
priv->ep0state = LPC214X_EP0SHORTWRITE;
}
else
{
priv->stalled = 1;
}
}
break;
case USB_REQ_RECIPIENT_INTERFACE:
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_IFGETSTATUS), 0);
response[0] = 0;
response[1] = 0;
lpc214x_epwrite(LPC214X_EP0_IN, response, 2);
priv->ep0state = LPC214X_EP0SHORTWRITE;
}
break;
default:
{
priv->stalled = 1;
}
break;
}
}
}
break;
case USB_REQ_CLEARFEATURE:
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_CLEARFEATURE), 0);
if (req.type != USB_REQ_RECIPIENT_ENDPOINT)
{
lpc214x_dispatchrequest(priv, &req);
}
else if (priv->paddrset && GETUINT16(req.value) == USB_ENDPOINT_HALT &&
GETUINT16(req.index) < LPC214X_NLOGENDPOINTS && GETUINT16(req.len) == 0)
{
ubyte epphys = LPC214X_EP_LOG2PHY(GETUINT16(req.index));
priv->eplist[epphys].halted = 0;
lpc214x_epwrite(LPC214X_EP0_IN, NULL, 0);
priv->ep0state = LPC214X_EP0STATUSIN;
}
else
{
priv->stalled = 1;
}
}
break;
case USB_REQ_SETFEATURE:
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_SETFEATURE), 0);
if (req.type == USB_REQ_RECIPIENT_DEVICE &&
GETUINT16(req.value) == USB_FEATURE_TESTMODE)
{
uvdbg("test mode: %d\n", GETUINT16(req.index));
}
else if (req.type != USB_REQ_RECIPIENT_ENDPOINT)
{
lpc214x_dispatchrequest(priv, &req);
}
else if (priv->paddrset && GETUINT16(req.value) == USB_ENDPOINT_HALT &&
GETUINT16(req.index) < LPC214X_NLOGENDPOINTS && GETUINT16(req.len) == 0)
{
ubyte epphys = LPC214X_EP_LOG2PHY(GETUINT16(req.index));
priv->eplist[epphys].halted = 1;
lpc214x_epwrite(LPC214X_EP0_IN, NULL, 0);
priv->ep0state = LPC214X_EP0STATUSIN;
}
else
{
priv->stalled = 1;
}
}
break;
case USB_REQ_SETADDRESS:
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_SETADDRESS), 0);
if ((req.type == USB_REQ_RECIPIENT_DEVICE) &&
(GETUINT16(req.index) == 0) && (GETUINT16(req.len) == 0) &&
(GETUINT16(req.value) < 128))
{
lpc214x_epwrite(LPC214X_EP0_IN, NULL, 0);
priv->eplist[LPC214X_EP0_OUT].eplog = req.value[0];
priv->eplist[LPC214X_EP0_IN].eplog = req.value[0];
priv->ep0state = LPC214X_EP0SETADDRESS;
}
else
{
priv->stalled = 1;
}
}
break;
case USB_REQ_GETDESCRIPTOR:
case USB_REQ_SETDESCRIPTOR:
case USB_REQ_GETCONFIGURATION:
{
if (priv->paddrset && (GETUINT16(req.value) == 0) &&
(GETUINT16(req.index) == 0) && (GETUINT16(req.len) == 1))
{
lpc214x_dispatchrequest(priv, &req);
}
else
{
priv->stalled = 1;
}
}
break;
case USB_REQ_SETCONFIGURATION:
case USB_REQ_GETINTERFACE:
case USB_REQ_SETINTERFACE:
{
lpc214x_dispatchrequest(priv, &req);
}
break;
case USB_REQ_SYNCHFRAME:
break;
default:
priv->stalled = 1;
break;
}
if (priv->stalled)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_STALLED), priv->ep0state);
lpc214x_epstall(&ep0->ep, FALSE);
lpc214x_epstall(&ep0->ep, FALSE);
}
}
/*******************************************************************************
* Name: lpc214x_ep0dataoutinterrupt
*
* Description:
* USB Ctrl EP Data OUT Event. This is logically part of the USB interrupt
* handler.
*
*******************************************************************************/
static inline void lpc214x_ep0dataoutinterrupt(struct lpc214x_usbdev_s *priv)
{
struct lpc214x_ep_s *ep0;
uint32 pktlen;
/* Copy new setup packet int setup buffer */
switch (priv->ep0state)
{
case LPC214X_EP0SHORTWRITE:
{
priv->ep0state = LPC214X_EP0STATUSOUT;
pktlen = lpc214x_epread(LPC214X_EP0_OUT, NULL, CONFIG_USBDEV_EP0_MAXSIZE);
if (LPC214X_READOVERRUN(pktlen))
{
lpc214x_ep0setup(priv);
}
}
break;
case LPC214X_EP0SHORTWRSENT:
{
priv->ep0state = LPC214X_EP0IDLE;
pktlen = lpc214x_epread(LPC214X_EP0_OUT, NULL, CONFIG_USBDEV_EP0_MAXSIZE);
if (LPC214X_READOVERRUN(pktlen))
{
lpc214x_ep0setup(priv);
}
}
break;
case LPC214X_EP0IDLE:
{
ep0 = &priv->eplist[LPC214X_EP0_OUT];
if (!sq_empty(&ep0->reqlist))
{
lpc214x_wrrequest(ep0);
}
}
break;
default:
priv->stalled = 1;
break;
}
if (priv->stalled)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_STALLED), priv->ep0state);
ep0 = &priv->eplist[LPC214X_EP0_OUT];
lpc214x_epstall(&ep0->ep, FALSE);
lpc214x_epstall(&ep0->ep, FALSE);
}
return;
}
/*******************************************************************************
* Name: lpc214x_ep0dataininterrupt
*
* Description:
* USB Ctrl EP Data IN Event. This is logically part of the USB interrupt
* handler.
*
*******************************************************************************/
static inline void lpc214x_ep0dataininterrupt(struct lpc214x_usbdev_s *priv)
{
struct lpc214x_ep_s *ep0;
switch (priv->ep0state)
{
case LPC214X_EP0STATUSOUT:
case LPC214X_EP0STATUSIN:
priv->ep0state = LPC214X_EP0IDLE;
break;
case LPC214X_EP0SHORTWRITE:
priv->ep0state = LPC214X_EP0SHORTWRSENT;
break;
case LPC214X_EP0SETADDRESS:
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_SETADDRESS), 0);
/* Set EP0 logical address */
ubyte eplog = priv->eplist[LPC214X_EP0_OUT].eplog;
lpc214x_usbcmd(CMD_USB_DEV_SETADDRESS, CMD_USB_SETADDRESS_DEVEN | eplog);
lpc214x_usbcmd(CMD_USB_DEV_SETADDRESS, CMD_USB_SETADDRESS_DEVEN | eplog);
/* Not yet fully configured */
lpc214x_usbcmd(CMD_USB_DEV_CONFIG, 0);
if (eplog)
{
priv->paddrset = 1;
priv->ep0state = LPC214X_EP0IDLE;
}
}
break;
default:
priv->stalled = 1;
break;
}
if (priv->stalled)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_STALLED), priv->ep0state);
ep0 = &priv->eplist[LPC214X_EP0_IN];
lpc214x_epstall(&ep0->ep, FALSE);
lpc214x_epstall(&ep0->ep, FALSE);
}
}
/*******************************************************************************
* Name: lpc214x_usbinterrupt
*
* Description:
* USB interrupt handler
*
*******************************************************************************/
static int lpc214x_usbinterrupt(int irq, FAR void *context)
{
struct lpc214x_usbdev_s *priv = &g_usbdev;
struct lpc214x_ep_s *privep ;
uint32 devintstatus; /* Sampled state of the device interrupt status register */
uint32 epintstatus; /* Sampled state of the endpoint interrupt status register */
#ifdef CONFIG_LPC214X_USBDEV_DMA
uint32 dmaintstatus; /* Sampled state of dma interrupt status register */
#endif
uint32 softprio; /* Current priority interrupt bitset */
uint32 pending; /* Pending subset of priority interrupt bitset */
ubyte epphy; /* Physical endpoint number being processed */
int i;
usbtrace(TRACE_INTENTRY(LPC214X_TRACEINTID_USB), 0);
/* Read the device interrupt status register */
devintstatus = getreg32(LPC214X_USBDEV_DEVINTST);
#ifdef CONFIG_LPC214X_USBDEV_DMA
/* Check for low priority and high priority (non-DMA) interrupts */
if ((getreg(LPC214X_USBDEV_INTST) & (USBDEV_INTST_REQLP|USBDEV_INTST_REQHP)) != 0)
{
#endif
#ifdef CONFIG_LPC214X_USBDEV_EPFAST_INTERRUPT
/* Fast EP interrupt */
if ((devintstatus & USBDEV_DEVINT_EPFAST) != 0)
{
/* Clear Fast EP interrupt */
putreg32(USBDEV_DEVINT_EPFAST, LPC214X_USBDEV_DEVINTCLR);
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EPFAST), 0);
/* Do what? */
}
#endif
#if CONFIG_DEBUG
/* USB engine error interrupt */
if ((devintstatus & USBDEV_DEVINT_EPRINT))
{
ubyte errcode;
/* Clear the error interrupt */
putreg32(USBDEV_DEVINT_EPRINT, LPC214X_USBDEV_DEVINTCLR);
/* And show what error occurred */
errcode = (ubyte)lpc214x_usbcmd(CMD_USB_DEV_READERRORSTATUS, 0) & 0x0f;
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EPRINT), (uint16)errcode);
}
#endif
#ifdef CONFIG_LPC214X_USBDEV_FRAME_INTERRUPT
/* Frame interrupt */
if ((devintstatus & USBDEV_DEVINT_FRAME) != 0)
{
/* Clear the frame interrupt */
putreg32(USBDEV_DEVINT_FRAME, LPC214X_USBDEV_DEVINTCLR);
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_FRAME), 0);
/* Then read the start of frame value */
priv->sof = (uint16)lpc214x_usbcmd(CMD_USB_DEV_READFRAMENO, 0);
}
#endif
/* Device Status interrupt */
if ((devintstatus & USBDEV_DEVINT_DEVSTAT) != 0)
{
/* Clear Device status interrupt */
putreg32(USBDEV_DEVINT_DEVSTAT, LPC214X_USBDEV_DEVINTCLR);
/* Get device status */
g_usbdev.devstatus = lpc214x_usbcmd(CMD_USB_DEV_GETSTATUS, 0);
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_DEVSTAT), (uint16)g_usbdev.devstatus);
/* Device connection status */
if (DEVSTATUS_CONNCHG(g_usbdev.devstatus))
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_CONNECTCHG), 0);
if (DEVSTATUS_CONNECT(g_usbdev.devstatus))
{
/* Host is connected */
if (!priv->attached)
{
/* We have a transition from unattached to attached */
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_CONNECTED), 0);
priv->usbdev.speed = USB_SPEED_UNKNOWN;
lpc214x_usbcmd(CMD_USB_DEV_CONFIG, 0);
priv->attached = 1;
}
}
/* Otherwise the host is not attached */
else if (priv->attached)
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_DISCONNECTED), 0);
priv->usbdev.speed = USB_SPEED_UNKNOWN;
lpc214x_usbcmd(CMD_USB_DEV_CONFIG, 0);
priv->attached = 0;
priv->paddrset = 0;
}
}
/* Device suspend status */
if (DEVSTATUS_SUSPCHG(g_usbdev.devstatus))
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_SUSPENDCHG), 0);
}
/* Device reset */
if (DEVSTATUS_RESET(g_usbdev.devstatus))
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_DEVRESET), 0);
lpc214x_usbreset(priv);
}
}
/* Slow EP interrupt */
if ((devintstatus & USBDEV_DEVINT_EPSLOW) != 0)
{
/* Clear Slow EP interrupt */
putreg32(USBDEV_DEVINT_EPSLOW, LPC214X_USBDEV_DEVINTCLR);
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EPSLOW), 0);
do
{
/* Read the endpoint interrupt status register */
epintstatus = getreg32(LPC214X_USBDEV_EPINTST);
/* Loop twice: Process software high priority interrupts
* on the first pass and low priority interrupts on the
* second.
*/
softprio = priv->softprio;
for (i = 0; i < 2; i++, softprio = ~softprio)
{
/* On the first time through the loop, pending will be
* the bitset of high priority pending interrupts; on the
* second time throught it will be the bitset of low
* priority interrupts.
*/
pending = epintstatus & softprio;
/* EP0 OUT interrupt indicated by bit0 == 1 */
if ((pending & 1) != 0)
{
/* Clear the endpoint interrupt */
uint32 result = lpc214x_epclrinterrupt(LPC214X_CTRLEP_OUT);
if (result & USBDEV_EPSETUPPACKET)
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EP0SETUP), (uint16)result);
lpc214x_ep0setup(priv);
}
else
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EP0OUT), priv->ep0state);
lpc214x_ep0dataoutinterrupt(priv);
}
break;
}
/* EP0 IN interrupt indicated by bit1 == 1 */
if ((pending & 2) != 0)
{
/* Clear the endpoint interrupt */
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EP0IN), priv->ep0state);
(void)lpc214x_epclrinterrupt(LPC214X_CTRLEP_IN);
lpc214x_ep0dataininterrupt(priv);
}
pending >>= 2;
/* All other endpoints EP 1-31 */
for (epphy = 2; pending; epphy++, pending >>= 1)
{
/* Is the endpoint interrupt pending? */
if ((pending & 1) != 0)
{
/* Yes.. clear the endpoint interrupt */
(void)lpc214x_epclrinterrupt(epphy);
/* Get the endpoint sructure corresponding to the physical
* endpoint number.
*/
privep = &priv->eplist[epphy];
/* Check for complete on IN or OUT endpoint. Odd physical
* endpoint addresses are IN endpoints.
*/
if ((epphy & 1) != 0)
{
/* IN: device-to-host */
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EPOUT), (uint16)epphy);
if (priv->usbdev.speed == USB_SPEED_UNKNOWN)
{
priv->usbdev.speed = USB_SPEED_FULL;
lpc214x_usbcmd(CMD_USB_DEV_CONFIG, 1);
}
/* Write host data from the current write request */
if (!sq_empty(&privep->reqlist))
{
lpc214x_wrrequest(privep);
}
}
else
{
/* OUT: host-to-device */
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EPIN), (uint16)epphy);
/* Read host data into the current read request */
if (!sq_empty(&privep->reqlist))
{
lpc214x_rdrequest(privep);
}
else
{
uvdbg("Pending interrupt\n");
priv->rxpending = 1;
}
}
}
}
}
}
while (epintstatus);
}
#ifdef CONFIG_LPC214X_USBDEV_DMA
}
/* Check for DMA interrupts */
if ((getreg(LPC214X_USBDEV_INTST) & USBDEV_INTST_REQDMA) != 0)
{
/* First Software High priority and then low priority */
uint32 tmp;
/* Collect the DMA interrupt sources */
dmaintstatus = 0;
tmp = getreg32(LPC214X_USBDEV_EOTINTST);
if (getreg32(LPC214X_USBDEV_DMAINTEN) & 1)
{
dmaintstatus |= tmp;
}
putreg32(tmp, LPC214X_USBDEV_EOTINTCLR);
tmp = getreg32(LPC214X_USBDEV_NDDRINTST);
if (getreg32(LPC214X_USBDEV_DMAINTEN) & 2)
{
dmaintstatus |= tmp;
}
putreg32(tmp, LPC214X_USBDEV_NDDRINTCLR);
tmp = getreg32(LPC214X_USBDEV_SYSERRINTST);
if (getreg32(LPC214X_USBDEV_DMAINTEN) & 4)
{
dmaintstatus |= tmp;
}
putreg32(tmp, LPC214X_USBDEV_SYSERRINTCLR);
/* Loop twice: Process software high priority interrupts on the
* first pass and low priority interrupts on the second.
*/
softprio = priv->softprio;
for (i = 0; i < 2; i++, softprio = ~softprio)
{
/* On the first time through the loop, pending will be
* the bitset of high priority pending interrupts; on the
* second time throught it will be the bitset of low
* priority interrupts. Note that EP0 IN and OUT are
* omitted.
*/
pending = (dmaintstatus & softprio) >> 2;
for (epphy = 2; pending; epphy++, pending >>= 1)
{
if ((pending & 1) != 0)
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EPDMA), (uint16)epphy);
#warning DO WHAT?
}
}
}
}
#endif
usbtrace(TRACE_INTEXIT(LPC214X_TRACEINTID_USB), 0);
return OK;
}
/*******************************************************************************
* Name: lpc214x_dmasetup
*
* Description:
* Setup for DMA Transfer
*
*******************************************************************************/
#ifdef CONFIG_LPC214X_USBDEV_DMA
static int lpc214x_dmasetup(struct lpc214x_usbdev_s *priv, ubyte epphy,
uint32 epmaxsize, uint32 nbytes, uint32 *isocpacket,
boolean isochronous);
{
struct lpc214x_dmadesc_s *dmadesc = priv;
uint32 reg;
#ifdef CONFIG_DEBUG
if (!priv || epphy < 2)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return -EINVAL;
}
#endif
/* Check if a DMA descriptor has been assigned. If not, than that indicates
* that we will have to do parallel I/O
*/
if (!dmadesc)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_NODMADESC), 0);
return -EBUSY;
}
/* Verify that the DMA descriptor is available */
if ((dmadesc->status & USB_DMADESC_STATUSMASK) == USB_DMADESC_BEINGSERVICED)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_DMABUSY), 0);
return -EBUSY; /* Shouldn't happen */
}
/* Init DMA Descriptor */
dmadesc->nexdesc = 0;
dmadesc->config = USB_DMADESC_MODENORMAL |
((epmaxsize << USB_DMADESC_PKTSIZESHIFT) & USB_DMADESC_PKTSIZEMASK) |
((nbytes << USB_DMADESC_BULENSHIFT) & USB_DMADESC_BUFLENMASK);
#ifdef CONFIG_USBDEV_ISOCHRONOUS
if (isochronous)
{
dmadesc->config |= USB_DMADESC_ISCOEP;
}
#endif
dmadesc->start = (uint32)&dmadesc->buffer;
dmadesc->status = 0;
#ifdef CONFIG_USBDEV_ISOCHRONOUS
dmadesc->size = (uint32)packet;
#endif
/* Enable DMA tranfer for this endpoint */
putreq32(1 << epphy, LPC214X_USBDEV_EPDMAEN);
/* Check state of IN/OUT Ep buffer */
reg = lpc214x_usbcmd(CMD_USB_EP_SELECT | epphy, 0);
if (((epphy & 1) != 0 && (reg & 0x60) == 0) ||
((epphy & 1) == 0 && (reg & 0x60) == 0x60))
{
/* DMA should be "being serviced" */
if ((dmadesc->status & USB_DMADESC_STATUSMASK) != USB_DMADESC_BEINGSERVICED))
{
/* Re-trigger the DMA Transfer */
putreq21(1 << epphy, LPC214X_USBDEV_DMARCLR);
putreq32(1 << epphy, LPC214X_USBDEV_EPDMAEN);
}
}
return OK;
}
#endif /* CONFIG_LPC214X_USBDEV_DMA */
/*******************************************************************************
* Name: lpc214x_dmarestart
*
* Description:
* Restart DMA Transfer
*
*******************************************************************************/
#ifdef CONFIG_LPC214X_USBDEV_DMA
static void lpc214x_dmarestart(ubyte epphy, uint32 descndx)
{
uint32 reg;
/* Clear DMA descriptor status */
USB_DmaDesc[descndx].status = 0;
/* Enable DMA transfer on the endpoint */
putreg32(1 << epph, LPC214X_USBDEV_EPDMAEN);
/* Check the state of IN/OUT EP buffer */
uint32 reg = lpc214x_usbcmd(CMD_USB_EP_SELECT | epphy, 0);
if (((epphy & 1) != 0 && (reg & 0x60) == 0) ||
((epphy & 1) == 0 && (reg & 0x60) == 0x60))
{
/* Re-trigger the DMA Transfer */
putreq21(1 << epphy, LPC214X_USBDEV_DMARCLR);
putreq32(1 << epphy, LPC214X_USBDEV_EPDMAEN);
}
}
#endif /* CONFIG_LPC214X_USBDEV_DMA */
/*******************************************************************************
* Name: lpc214x_dmadisable
*
* Description:
* Disable DMA transfer for the EP
*
*******************************************************************************/
#ifdef CONFIG_LPC214X_USBDEV_DMA
static void lpc214x_dmadisable(ubyte epphy)
{
EPDMADIS = 1 << epphy;
}
#endif /* CONFIG_LPC214X_USBDEV_DMA */
/*******************************************************************************
* Endpoint operations
*******************************************************************************/
/*******************************************************************************
* Name: lpc214x_epconfigure
*
* Description:
* Configure endpoint, making it usable
*
*******************************************************************************/
static int lpc214x_epconfigure(FAR struct usbdev_ep_s *ep,
FAR const struct usb_epdesc_s *desc)
{
FAR struct lpc214x_ep_s *privep = (FAR struct lpc214x_ep_s *)ep;
uint32 inten;
int eplog;
int epphy;
usbtrace(TRACE_EPCONFIGURE, privep->epphy);
eplog = desc->addr;
epphy = LPC214X_EP_LOG2PHY(eplog);
/* Realize the endpoint */
lpc214x_eprealize(privep, 1, GETUINT16(desc->mxpacketsize));
/* Enable and reset EP -- twice */
lpc214x_usbcmd(CMD_USB_EP_SETSTATUS | epphy, 0);
lpc214x_usbcmd(CMD_USB_EP_SETSTATUS | epphy, 0);
#ifdef CONFIG_LPC214X_USBDEV_DMA
/* Enable DMA Ep interrupt (WO) */
putreg32(1 << epphy, LPC214X_USBDEV_EPDMAEN);
#else
/* Enable Ep interrupt (R/W) */
inten = getreg32(LPC214X_USBDEV_EPINTEN);
inten |= (1 << epphy);
putreg32(inten, LPC214X_USBDEV_EPINTEN);
#endif
return OK;
}
/*******************************************************************************
* Name: lpc214x_epdisable
*
* Description:
* The endpoint will no longer be used
*
*******************************************************************************/
static int lpc214x_epdisable(FAR struct usbdev_ep_s *ep)
{
FAR struct lpc214x_ep_s *privep = (FAR struct lpc214x_ep_s *)ep;
irqstate_t flags;
uint32 mask = (1 << privep->epphy);
uint32 reg;
#ifdef CONFIG_DEBUG
if (!ep)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return -EINVAL;
}
#endif
usbtrace(TRACE_EPDISABLE, privep->epphy);
/* Cancel any ongoing activity */
flags = irqsave();
lpc214x_cancelrequests(privep);
/* Disable endpoint and interrupt */
reg = getreg32(LPC214X_USBDEV_REEP);
reg &= ~mask;
putreg32(reg, LPC214X_USBDEV_REEP);
putreg32(mask, LPC214X_USBDEV_EPDMADIS);
reg = getreg32(LPC214X_USBDEV_EPINTEN);
reg &= ~mask;
putreg32(reg, LPC214X_USBDEV_EPINTEN);
irqrestore(flags);
return OK;
}
/*******************************************************************************
* Name: lpc214x_epallocreq
*
* Description:
* Allocate an I/O request
*
*******************************************************************************/
static FAR struct usbdev_req_s *lpc214x_epallocreq(FAR struct usbdev_ep_s *ep)
{
FAR struct lpc214x_req_s *privreq;
#ifdef CONFIG_DEBUG
if (!ep)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return NULL;
}
#endif
usbtrace(TRACE_EPALLOCREQ, ((FAR struct lpc214x_ep_s *)ep)->epphy);
privreq = (FAR struct lpc214x_req_s *)malloc(sizeof(struct lpc214x_req_s));
if (!privreq)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_ALLOCFAIL), 0);
return NULL;
}
memset(privreq, 0, sizeof(struct lpc214x_req_s));
return &privreq->req;
}
/*******************************************************************************
* Name: lpc214x_epfreereq
*
* Description:
* Free an I/O request
*
*******************************************************************************/
static void lpc214x_epfreereq(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *req)
{
FAR struct lpc214x_req_s *privreq = (FAR struct lpc214x_req_s *)req;
#ifdef CONFIG_DEBUG
if (!ep || !req)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return;
}
#endif
usbtrace(TRACE_EPFREEREQ, ((FAR struct lpc214x_ep_s *)ep)->epphy);
free(privreq);
}
/*******************************************************************************
* Name: lpc214x_epallocbuffer
*
* Description:
* Allocate an I/O buffer
*
*******************************************************************************/
#ifdef CONFIG_LPC214X_USBDEV_DMA
static FAR void *lpc214x_epallocbuffer(FAR struct usbdev_ep_s *ep, uint16 nbytes)
{
FAR struct lpc214x_ep_s *privep = (FAR struct lpc214x_ep_s *)ep;
int descndx;
usbtrace(TRACE_EPALLOCBUFFER, privep->epphy);
/* Find a free DMA description */
#error "LOGIC INCOMPLETE"
/* Set UDCA to the allocated DMA descriptor for this endpoint */
USB_UDCA[privep->epphy] = &USB_DDESC[descndx];
return &USB_DDESC[descndx]
}
#endif
/*******************************************************************************
* Name: lpc214x_epfreebuffer
*
* Description:
* Free an I/O buffer
*
*******************************************************************************/
#ifdef CONFIG_LPC214X_USBDEV_DMA
static void lpc214x_epfreebuffer(FAR struct usbdev_ep_s *ep, FAR void *buf)
{
FAR struct lpc214x_ep_s *privep = (FAR struct lpc214x_ep_s *)ep;
usbtrace(TRACE_EPFREEBUFFER, privep->epphy);
/* Indicate that there is no DMA descriptor associated with this endpoint */
USB_UDCA[privep->epphy] = NULL;
/* Mark the DMA descriptor as free for re-allocation */
#error "LOGIC INCOMPLETE"
}
#endif
/*******************************************************************************
* Name: lpc214x_epsubmit
*
* Description:
* Submit an I/O request to the endpoint
*
*******************************************************************************/
static int lpc214x_epsubmit(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *req)
{
FAR struct lpc214x_req_s *privreq = (FAR struct lpc214x_req_s *)req;
FAR struct lpc214x_ep_s *privep = (FAR struct lpc214x_ep_s *)ep;
FAR struct lpc214x_usbdev_s *priv;
irqstate_t flags;
int ret = OK;
#ifdef CONFIG_DEBUG
if (!req || !req->callback || !req->buf || !ep)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return -EINVAL;
}
#endif
usbtrace(TRACE_EPSUBMIT, privep->epphy);
priv = privep->dev;
if (!priv->driver || priv->usbdev.speed == USB_SPEED_UNKNOWN)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_NOTCONFIGURED), 0);
return -ESHUTDOWN;
}
req->result = -EINPROGRESS;
req->xfrd = 0;
/* Check for NULL packet */
flags = irqsave();
if (req->len == 0 && (privep->in || privep->epphy == 3))
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_NULLPACKET), 0);
sq_addlast(&privreq->sqe, &privep->reqlist);
goto success_notransfer;
}
/* Has everything been sent? Or are we stalled? */
if (!sq_empty(&privep->reqlist) && !privep->stalled)
{
/* Handle zero-length transfers on EP0 */
if (privep->epphy == 0 && req->len == 0)
{
/* Nothing to transfer -- exit success, zero-bytes transferred */
usbtrace(TRACE_COMPLETE(privep->epphy), privreq->req.xfrd);
lpc214x_reqcomplete(privep, OK);
goto success_notransfer;
}
/* Handle IN requests */
if ((privep->in) || privep->epphy == 3)
{
ret = lpc214x_wrrequest(privep);
}
/* Handle pending OUT requests */
else if (priv->rxpending)
{
ret = lpc214x_rdrequest(privep);
priv->rxpending = 0;
}
else
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_BADREQUEST), 0);
ret = ERROR;
goto errout;
}
}
/* Add to endpoint's request queue */
if (ret >= 0)
{
usbtrace(TRACE_REQQUEUED(privep->epphy), privreq->req.len);
sq_addlast(&privreq->sqe, &privep->reqlist);
}
success_notransfer:
errout:
irqrestore(flags);
return ret;
}
/*******************************************************************************
* Name: lpc214x_epcancel
*
* Description:
* Cancel an I/O request previously sent to an endpoint
*
*******************************************************************************/
static int lpc214x_epcancel(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *req)
{
FAR struct lpc214x_ep_s *privep = (FAR struct lpc214x_ep_s *)ep;
FAR struct lpc214x_usbdev_s *priv;
irqstate_t flags;
#ifdef CONFIG_DEBUG
if (!ep || !req)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return -EINVAL;
}
#endif
usbtrace(TRACE_EPCANCEL, privep->epphy);
priv = privep->dev;
flags = irqsave();
lpc214x_cancelrequests(privep);
irqrestore(flags);
return OK;
}
/*******************************************************************************
* Name: lpc214x_epstall
*
* Description:
* Stall or resume and endpoint
*
*******************************************************************************/
static int lpc214x_epstall(FAR struct usbdev_ep_s *ep, boolean resume)
{
FAR struct lpc214x_ep_s *privep = (FAR struct lpc214x_ep_s *)ep;
usbtrace(resume ? TRACE_EPRESUME : TRACE_EPSTALL, privep->epphy);
lpc214x_usbcmd(CMD_USB_EP_SETSTATUS | privep->epphy, (resume ? 0 : USBDEV_EPSTALL));
return OK;
}
/*******************************************************************************
* Device operations
*******************************************************************************/
/*******************************************************************************
* Name: lcp214x_allocep
*
* Description:
* Allocate an endpoint matching the parameters.
*
* Input Parameters:
* epphy - 7-bit physical endpoint number (without direction bit). Zero means
* that any endpoint matching the other requirements will suffice.
* in - TRUE: IN (device-to-host) endpoint requested
* eptype - Endpoint type. One of {USB_EP_ATTR_XFER_ISOC, USB_EP_ATTR_XFER_BULK,
* USB_EP_ATTR_XFER_INT}
*
*******************************************************************************/
static FAR struct usbdev_ep_s *lcp214x_allocep(FAR struct usbdev_s *dev, ubyte epphy,
boolean in, ubyte eptype)
{
FAR struct lpc214x_usbdev_s *priv = (FAR struct lpc214x_usbdev_s *)dev;
uint32 epset = LPC214X_EPALLSET;
irqstate_t flags;
int epndx = 0;
usbtrace(TRACE_DEVALLOCEP, 0);
/* epphy=0 means that any endpoint will do */
if (epphy > 0)
{
if (epphy >= LPC214X_NLOGENDPOINTS)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_BADEPNO), 0);
return NULL;
}
epset &= 3 << epphy;
}
/* Get the subset matching the requested direction */
if (in)
{
epset &= LPC214X_EPINSET;
}
else
{
epset &= LPC214X_EPOUTSET;
}
/* Get the subset matching the requested type */
switch (eptype)
{
case USB_EP_ATTR_XFER_INT: /* Interrupt endpoint */
epset &= LPC214X_EPINTRSET;
break;
case USB_EP_ATTR_XFER_BULK: /* Bulk endpoint */
epset &= LPC214X_EPBULKSET;
break;
case USB_EP_ATTR_XFER_ISOC: /* Isochronous endpoint */
epset &= LPC214X_EPBULKSET;
break;
case USB_EP_ATTR_XFER_CONTROL: /* Control endpoint -- not a valid choice */
default:
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_BADEPTYPE), 0);
return NULL;
}
/* Is the resulting endpoint supported by the LPC214x? */
if (epset)
{
/* Yes.. now see if any of the request endpoints are available */
flags = irqsave();
epset &= priv->epavail;
if (epset)
{
/* Select the lowest bit in the set of matching, available endpoints */
for (epndx = 2; epndx < LPC214X_NPHYSENDPOINTS; epndx++)
{
uint32 bit = 1 << epndx;
if ((epset & bit) == 0)
{
/* Mark the endpoint no longer available */
priv->wravail &= ~bit;
irqrestore(flags);
/* And return the pointer to the standard endpoint structure */
return &priv->eplist[epndx].ep;
}
}
/* Shouldn't get here */
}
irqrestore(flags);
}
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_NOEP), 0);
return NULL;
}
/*******************************************************************************
* Name: lpc214x_freeep
*
* Description:
* Free the previously allocated endpoint
*
*******************************************************************************/
static void lpc214x_freeep(FAR struct usbdev_s *dev, FAR struct usbdev_ep_s *ep)
{
FAR struct lpc214x_usbdev_s *priv = (FAR struct lpc214x_usbdev_s *)dev;
FAR struct lpc214x_ep_s *privep = (FAR struct lpc214x_ep_s *)ep;
irqstate_t flags;
usbtrace(TRACE_DEVFREEEP, (uint16)privep->epphy);
if (priv && privep)
{
/* Mark the endpoint as available */
flags = irqsave();
priv->wravail &= ~(1 << privep->epphy);
irqrestore(flags);
}
}
/*******************************************************************************
* Name: lpc214x_getframe
*
* Description:
* Returns the current frame number
*
*******************************************************************************/
static int lpc214x_getframe(struct usbdev_s *dev)
{
#ifdef CONFIG_LPC214X_USBDEV_FRAME_INTERRUPT
FAR struct lpc214x_usbdev_s *priv = (FAR struct lpc214x_usbdev_s *)dev;
/* Return last valid value of SOF read by the interrupt handler */
usbtrace(TRACE_DEVGETFRAME, (uint16)priv->sof);
return priv->sof;
#else
/* Return the last frame number detected by the hardware */
usbtrace(TRACE_DEVGETFRAME, 0);
return (int)lpc214x_usbcmd(CMD_USB_DEV_READFRAMENO, 0);
#endif
}
/*******************************************************************************
* Name: lpc214x_wakeup
*
* Description:
* Tries to wake up the host connected to this device
*
*******************************************************************************/
static int lpc214x_wakeup(struct usbdev_s *dev)
{
ubyte arg = USBDEV_DEVSTATUS_SUSPEND;
irqstate_t flags;
usbtrace(TRACE_DEVWAKEUP, (uint16)g_usbdev.devstatus);
flags = irqsave();
if (DEVSTATUS_CONNECT(g_usbdev.devstatus))
{
arg |= USBDEV_DEVSTATUS_CONNECT;
}
lpc214x_usbcmd(CMD_USB_DEV_SETSTATUS, arg);
irqrestore(flags);
return OK;
}
/*******************************************************************************
* Name: lpc214x_selfpowered
*
* Description:
* Sets/clears the device selfpowered feature
*
*******************************************************************************/
static int lpc214x_selfpowered(struct usbdev_s *dev, boolean selfpowered)
{
FAR struct lpc214x_usbdev_s *priv = (FAR struct lpc214x_usbdev_s *)dev;
usbtrace(TRACE_DEVSELFPOWERED, (uint16)selfpowered);
#ifdef CONFIG_DEBUG
if (!dev)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return -ENODEV;
}
#endif
priv->selfpowered = selfpowered;
return OK;
}
/*******************************************************************************
* Name: lpc214x_pullup
*
* Description:
* Software-controlled connect to/disconnect from USB host
*
*******************************************************************************/
static int lpc214x_pullup(struct usbdev_s *dev, boolean enable)
{
usbtrace(TRACE_DEVPULLUP, (uint16)enable);
/* Prohibit interruption during connection command */
irqstate_t flags = irqsave();
/* The USBDEV_DEVSTATUS_CONNECT bit in the CMD_USB_DEV_SETSTATUS command
* controls the LPC214x SoftConnect_N output pin that is used for SoftConnect.
*/
lpc214x_usbcmd(CMD_USB_DEV_SETSTATUS, (enable ? USBDEV_DEVSTATUS_CONNECT : 0));
irqrestore(flags);
return OK;
}
/*******************************************************************************
* Public Functions
*******************************************************************************/
/*******************************************************************************
* Name: up_usbinitialize
*
* Description:
* Initialize USB hardware.
*
* Assumptions:
* - This function is called very early in the initialization sequence
* - PLL initialization is not performed here but should been in the low-level
* boot logic. For the USB engine, FUSB=FOSC*PLL_M. The USB device controller
* clock is a 48MHz clock.
*
*******************************************************************************/
void up_usbinitialize(void)
{
struct lpc214x_usbdev_s *priv = &g_usbdev;
uint32 reg;
usbtrace(TRACE_DEVINIT, 0);
/* Initialize the device state structure */
memset(priv, 0, sizeof(struct lpc214x_usbdev_s));
priv->usbdev.ops = &g_devops;
priv->wravail = LPC214X_EPALLSET;
/* Turn on USB power and clocking */
reg = getreg32(LPC214X_PCON_PCONP);
reg |= LPC214X_PCONP_PCUSB;
putreg32(reg, LPC214X_PCON_PCONP);
/* Enable Vbus sense and Connect */
reg = getreg32(LPC214X_PINSEL1);
reg = (reg & LPC214X_USBDEV_PINMASK) | LPC214X_USBDEV_PINSEL;
putreg32(reg, LPC214X_PINSEL1);
/* Attach USB controller interrupt handler */
if (irq_attach(LPC214X_USB_IRQ, lpc214x_usbinterrupt) != 0)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_IRQREGISTRATION), 0);
goto errout;
}
/* Enable USB inerrupts */
up_enable_irq(LPC214X_USB_IRQ);
/* Disconnect device */
lpc214x_pullup(&priv->usbdev, FALSE);
/* Enable EP0 for OUT (host-to-device) */
lpc214x_usbcmd(CMD_USB_DEV_SETADDRESS, CMD_USB_SETADDRESS_DEVEN|LPC214X_EP0_OUT);
lpc214x_usbcmd(CMD_USB_DEV_SETADDRESS, CMD_USB_SETADDRESS_DEVEN|LPC214X_EP0_OUT);
/* Reset/Re-initialize the USB hardware */
lpc214x_usbreset(priv);
/* Init Device state structure */
priv->devstatus = lpc214x_usbcmd(CMD_USB_DEV_GETSTATUS, 0);
return;
errout:
up_usbuninitialize();
}
/*******************************************************************************
* Name: up_usbuninitialize
*******************************************************************************/
void up_usbuninitialize(void)
{
struct lpc214x_usbdev_s *priv = &g_usbdev;
uint32 reg;
irqstate_t flags;
usbtrace(TRACE_DEVUNINIT, 0);
if (priv->driver)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_DRIVERREGISTERED), 0);
usbdev_unregister(priv->driver);
}
/* Disconnect device */
flags = irqsave();
lpc214x_pullup(&priv->usbdev, FALSE);
priv->usbdev.speed = USB_SPEED_UNKNOWN;
lpc214x_usbcmd(CMD_USB_DEV_CONFIG, 0);
/* Disable and detach IRQs */
up_disable_irq(LPC214X_USB_IRQ);
irq_detach(LPC214X_USB_IRQ);
/* Turn off USB power and clocking */
reg = getreg32(LPC214X_PCON_PCONP);
reg &= ~LPC214X_PCONP_PCUSB;
putreg32(reg, LPC214X_PCON_PCONP);
irqrestore(flags);
}
/*******************************************************************************
* Name: usbdev_register
*
* Description:
* Register a USB device class driver. The class driver's bind() method will be
* called to bind it to a USB device driver.
*
*******************************************************************************/
int usbdev_register(struct usbdevclass_driver_s *driver)
{
int ret;
usbtrace(TRACE_DEVREGISTER, 0);
#ifdef CONFIG_DEBUG
if (!driver || !driver->ops.bind || !driver->ops.unbind ||
!driver->ops.disconnect || !driver->ops.setup)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return -EINVAL;
}
if (g_usbdev.driver)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_DRIVER), 0);
return -EBUSY;
}
#endif
/* First hook up the driver */
g_usbdev.driver = driver;
/* Then bind the class driver */
ret = CLASS_BIND(driver, &g_usbdev.usbdev);
if (ret)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_BINDFAILED), (uint16)-ret);
g_usbdev.driver = NULL;
}
return ret;
}
/*******************************************************************************
* Name: usbdev_unregister
*
* Description:
* Un-register usbdev class driver.If the USB device is connected to a USB host,
* it will first disconnect(). The driver is also requested to unbind() and clean
* up any device state, before this procedure finally returns.
*
*******************************************************************************/
int usbdev_unregister(struct usbdevclass_driver_s *driver)
{
usbtrace(TRACE_DEVUNREGISTER, 0);
#ifdef CONFIG_DEBUG
if (driver != g_usbdev.driver)
{
usbtrace(TRACE_ERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return -EINVAL;
}
#endif
/* Unbind the class driver */
CLASS_UNBIND(driver, &g_usbdev.usbdev);
/* Unhook the driver */
g_usbdev.driver = NULL;
return OK;
}
