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apache / nuttx / refs/heads/master / . / arch / arm / src / lpc214x / lpc214x_usbdev.c
blob: 85423790002fc2cf201715a14e9839067e19278a [file] [log] [blame]
/****************************************************************************
* arch/arm/src/lpc214x/lpc214x_usbdev.c
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/kmalloc.h>
#include <nuttx/usb/usb.h>
#include <nuttx/usb/usbdev.h>
#include <nuttx/usb/usbdev_trace.h>
#include <nuttx/irq.h>
#include <arch/board/board.h>
#include "chip.h"
#include "arm_internal.h"
#include "lpc214x_usbdev.h"
#include "lpc214x_pll.h"
#include "lpc214x_power.h"
/****************************************************************************
* Pre-processor 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
/* Extremely detailed register debug that you would normally never want
* enabled.
*/
#undef CONFIG_LPC214X_USBDEV_REGDEBUG
/* 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_FEATURES
# 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 ********************************************************************/
/* Trace error codes */
#define LPC214X_TRACEERR_ALLOCFAIL 0x0001
#define LPC214X_TRACEERR_BADCLEARFEATURE 0x0002
#define LPC214X_TRACEERR_BADDEVGETSTATUS 0x0003
#define LPC214X_TRACEERR_BADEPNO 0x0004
#define LPC214X_TRACEERR_BADEPGETSTATUS 0x0005
#define LPC214X_TRACEERR_BADEPTYPE 0x0006
#define LPC214X_TRACEERR_BADGETCONFIG 0x0007
#define LPC214X_TRACEERR_BADGETSETDESC 0x0008
#define LPC214X_TRACEERR_BADGETSTATUS 0x0009
#define LPC214X_TRACEERR_BADSETADDRESS 0x000a
#define LPC214X_TRACEERR_BADSETCONFIG 0x000b
#define LPC214X_TRACEERR_BADSETFEATURE 0x000c
#define LPC214X_TRACEERR_BINDFAILED 0x000d
#define LPC214X_TRACEERR_DISPATCHSTALL 0x000e
#define LPC214X_TRACEERR_DMABUSY 0x000f
#define LPC214X_TRACEERR_DRIVER 0x0010
#define LPC214X_TRACEERR_DRIVERREGISTERED 0x0011
#define LPC214X_TRACEERR_EP0INSTALLED 0x0012
#define LPC214X_TRACEERR_EP0OUTSTALLED 0x0013
#define LPC214X_TRACEERR_EP0SETUPSTALLED 0x0014
#define LPC214X_TRACEERR_EPINNULLPACKET 0x0015
#define LPC214X_TRACEERR_EPOUTNULLPACKET 0x0016
#define LPC214X_TRACEERR_EPREAD 0x0017
#define LPC214X_TRACEERR_INVALIDCMD 0x0018
#define LPC214X_TRACEERR_INVALIDCTRLREQ 0x0019
#define LPC214X_TRACEERR_INVALIDPARMS 0x001a
#define LPC214X_TRACEERR_IRQREGISTRATION 0x001b
#define LPC214X_TRACEERR_NODMADESC 0x001c
#define LPC214X_TRACEERR_NOEP 0x001d
#define LPC214X_TRACEERR_NOTCONFIGURED 0x001e
#define LPC214X_TRACEERR_REQABORTED 0x001f
/* 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_EPINQEMPTY 0x0011
#define LPC214X_TRACEINTID_EP0INSETADDRESS 0x0012
#define LPC214X_TRACEINTID_EPOUT 0x0013
#define LPC214X_TRACEINTID_EPOUTQEMPTY 0x0014
#define LPC214X_TRACEINTID_EP0SETUPSETADDRESS 0x0015
#define LPC214X_TRACEINTID_EPRINT 0x0016
#define LPC214X_TRACEINTID_EPSLOW 0x0017
#define LPC214X_TRACEINTID_FRAME 0x0018
#define LPC214X_TRACEINTID_GETCONFIG 0x0019
#define LPC214X_TRACEINTID_GETSETDESC 0x001a
#define LPC214X_TRACEINTID_GETSETIF 0x001b
#define LPC214X_TRACEINTID_GETSTATUS 0x001c
#define LPC214X_TRACEINTID_IFGETSTATUS 0x001d
#define LPC214X_TRACEINTID_SETCONFIG 0x001e
#define LPC214X_TRACEINTID_SETFEATURE 0x001f
#define LPC214X_TRACEINTID_SUSPENDCHG 0x0020
#define LPC214X_TRACEINTID_SYNCHFRAME 0x0021
/* 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
* received 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 descriptors located at the
* beginning of USB RAM. Each pointer points to a DMA descriptor with
* associated DMA buffer.
*/
#define USB_UDCA (uint32_t *)LPC214X_USBDEV_RAMBASE)
#define USB_USCASIZE (LPC214X_NPHYSENDPOINTS*sizeof(uint32_t))
/* 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_t))
#else
# define USB_DDESCSIZE (4*sizeof(uint32_t))
#endif
/* Endpoints ****************************************************************/
/* Number of endpoints */
#define LPC214X_NLOGENDPOINTS (16) /* ep0-15 */
#define LPC214X_NPHYSENDPOINTS (32) /* x2 for IN and OUT */
/* Odd physical endpoint numbers are IN; even are out */
#define LPC214X_EPPHYIN(epphy) (((epphy)&1)!=0)
#define LPC214X_EPPHYOUT(epphy) (((epphy)&1)==0)
#define LPC214X_EPPHYIN2LOG(epphy) (((uint8_t)(epphy)>>1)|USB_DIR_IN)
#define LPC214X_EPPHYOUT2LOG(epphy) (((uint8_t)(epphy)>>1)|USB_DIR_OUT)
/* 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_EPDBLBUFFER (0xf3cf3cf0) /* Double buffered endpoints */
#define LPC214X_EP0MAXPACKET (64) /* EP0 max packet size (1-64) */
#define LPC214X_BULKMAXPACKET (64) /* Bulk endpoint max packet (8/16/32/64) */
#define LPC214X_INTRMAXPACKET (64) /* Interrupt endpoint max packet (1 to 64) */
#define LPC214X_ISOCMAXPACKET (512) /* Actually 1..1023 */
/* EP0 status. EP0 transfers occur in a number of different contexts. A
* simple state machine is required to handle the various transfer complete
* interrupt responses. The following values are the various states:
*/
/* INTERRUPT CAUSE */
#define LPC214X_EP0REQUEST (0) /* Normal request handling */
#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 */
#define LPC214X_EP0WRITEREQUEST (6) /* EP0 write request sent */
/* Request queue operations *************************************************/
#define lpc214x_rqempty(ep) ((ep)->head == NULL)
#define lpc214x_rqpeek(ep) ((ep)->head)
/****************************************************************************
* 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 */
struct lpc214x_req_s *flink; /* 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 */
struct lpc214x_req_s *head; /* Request list for this endpoint */
struct lpc214x_req_s *tail;
uint8_t epphy; /* Physical EP address */
uint8_t stalled:1; /* 1: Endpoint is stalled */
uint8_t halted:1; /* 1: Endpoint feature halted */
uint8_t txbusy:1; /* 1: TX endpoint FIFO full */
uint8_t txnullpkt:1; /* Null packet needed at end of transfer */
};
/* This represents a DMA descriptor */
#ifdef CONFIG_LPC214X_USBDEV_DMA
struct lpc214x_dmadesc_s
{
uint32_t nextdesc; /* Address of the next DMA descriptor in RAM */
uint32_t config; /* Misc. bit encoded configuration information */
uint32_t start; /* DMA start address */
uint32_t status; /* Misc. bit encoded status information */
#ifdef CONFIG_USBDEV_ISOCHRONOUS
uint32_t size; /* Isochronous packet size address */
#endif
uint8_t 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 */
uint8_t devstatus; /* Last response to device status command */
uint8_t ep0state; /* State of certain EP0 operations */
uint8_t paddr; /* Address assigned by SETADDRESS */
uint8_t stalled:1; /* 1: Protocol stalled */
uint8_t selfpowered:1; /* 1: Device is self powered */
uint8_t paddrset:1; /* 1: Peripheral addr has been set */
uint8_t attached:1; /* 1: Host attached */
uint8_t rxpending:1; /* 1: RX pending */
uint32_t softprio; /* Bitset of high priority interrupts */
uint32_t epavail; /* Bitset of available endpoints */
#ifdef CONFIG_LPC214X_USBDEV_FRAME_INTERRUPT
uint32_t 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
****************************************************************************/
/* Register operations ******************************************************/
#ifdef CONFIG_LPC214X_USBDEV_REGDEBUG
static uint32_t lpc214x_getreg(uint32_t addr);
static void lpc214x_putreg(uint32_t val, uint32_t addr);
#else
# define lpc214x_getreg(addr) getreg32(addr)
# define lpc214x_putreg(val,addr) putreg32(val,addr)
#endif
/* Command operations *******************************************************/
static uint32_t lpc214x_usbcmd(uint16_t cmd, uint8_t data);
/* Request queue operations *************************************************/
static struct lpc214x_req_s *lpc214x_rqdequeue(struct lpc214x_ep_s *privep);
static void lpc214x_rqenqueue(struct lpc214x_ep_s *privep,
struct lpc214x_req_s *req);
/* Low level data transfers and request operations **************************/
static void lpc214x_epwrite(uint8_t epphy,
const uint8_t *data,
uint32_t nbytes);
static int lpc214x_epread(uint8_t epphy, uint8_t *data, uint32_t nbytes);
static inline void lpc214x_abortrequest(struct lpc214x_ep_s *privep,
struct lpc214x_req_s *privreq, int16_t result);
static void lpc214x_reqcomplete(struct lpc214x_ep_s *privep, int16_t 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 struct
lpc214x_ep_s *lpc214x_epfindbyaddr(struct lpc214x_usbdev_s *priv,
uint16_t eplog);
static void lpc214x_eprealize(struct lpc214x_ep_s *privep, bool prio,
uint32_t packetsize);
static uint8_t lpc214x_epclrinterrupt(uint8_t epphy);
static inline void lpc214x_ep0configure(struct lpc214x_usbdev_s *priv);
#ifdef CONFIG_LPC214X_USBDEV_DMA
static inline void lpc214x_dmareset(uint32_t 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 *ctrl);
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, void *context, void *arg);
#ifdef CONFIG_LPC214X_USBDEV_DMA
static int lpc214x_dmasetup(struct lpc214x_usbdev_s *priv, uint8_t epphy,
uint32_t epmaxsize, uint32_t nbytes, uint32_t *isocpacket,
bool isochronous);
static void lpc214x_dmarestart(uint8_t epphy, uint32_t descndx);
static void lpc214x_dmadisable(uint8_t epphy);
#endif /* CONFIG_LPC214X_USBDEV_DMA */
/* Endpoint operations ******************************************************/
static int lpc214x_epconfigure(struct usbdev_ep_s *ep,
const struct usb_epdesc_s *desc, bool last);
static int lpc214x_epdisable(struct usbdev_ep_s *ep);
static struct usbdev_req_s *lpc214x_epallocreq(struct usbdev_ep_s *ep);
static void lpc214x_epfreereq(struct usbdev_ep_s *ep,
struct usbdev_req_s *);
#ifdef CONFIG_USBDEV_DMA
static void *lpc214x_epallocbuffer(struct usbdev_ep_s *ep,
uint16_t nbytes);
static void lpc214x_epfreebuffer(struct usbdev_ep_s *ep, void *buf);
#endif
static int lpc214x_epsubmit(struct usbdev_ep_s *ep,
struct usbdev_req_s *req);
static int lpc214x_epcancel(struct usbdev_ep_s *ep,
struct usbdev_req_s *req);
static int lpc214x_epstall(struct usbdev_ep_s *ep, bool resume);
/* USB device controller operations *****************************************/
static struct usbdev_ep_s *lcp214x_allocep(struct usbdev_s *dev,
uint8_t epno, bool in, uint8_t eptype);
static void lpc214x_freeep(struct usbdev_s *dev,
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, bool selfpowered);
static int lpc214x_pullup(struct usbdev_s *dev, bool 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_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_getreg
*
* Description:
* Get the contents of an LPC214x register
*
****************************************************************************/
#ifdef CONFIG_LPC214X_USBDEV_REGDEBUG
static uint32_t lpc214x_getreg(uint32_t addr)
{
static uint32_t prevaddr = 0;
static uint32_t preval = 0;
static uint32_t count = 0;
/* Read the value from the register */
uint32_t val = getreg32(addr);
/* Is this the same value that we read from the same register last time?
* Are we polling the register? If so, suppress some of the output.
*/
if (addr == prevaddr && val == preval)
{
if (count == 0xffffffff || ++count > 3)
{
if (count == 4)
{
uinfo("...\n");
}
return val;
}
}
/* No this is a new address or value */
else
{
/* Did we print "..." for the previous value? */
if (count > 3)
{
/* Yes.. then show how many times the value repeated */
uinfo("[repeats %d more times]\n", count - 3);
}
/* Save the new address, value, and count */
prevaddr = addr;
preval = val;
count = 1;
}
/* Show the register value read */
uinfo("%08x->%08x\n", addr, val);
return val;
}
#endif
/****************************************************************************
* Name: lpc214x_putreg
*
* Description:
* Set the contents of an LPC214x register to a value
*
****************************************************************************/
#ifdef CONFIG_LPC214X_USBDEV_REGDEBUG
static void lpc214x_putreg(uint32_t val, uint32_t addr)
{
/* Show the register value being written */
uinfo("%08x<-%08x\n", addr, val);
/* Write the value */
putreg32(val, addr);
}
#endif
/****************************************************************************
* Name: lpc214x_usbcmd
*
* Description:
* Transmit commands to the USB engine
*
****************************************************************************/
static uint32_t lpc214x_usbcmd(uint16_t cmd, uint8_t data)
{
irqstate_t flags;
uint32_t tmp = 0;
/* Disable interrupt and clear CDFULL and CCEMPTY interrupt status */
flags = enter_critical_section();
lpc214x_putreg(USBDEV_DEVINT_CDFULL | USBDEV_DEVINT_CCEMTY,
LPC214X_USBDEV_DEVINTCLR);
/* Load command + WR in command code register */
lpc214x_putreg(((cmd & 0xff) << 16) + CMD_USB_CMDWR,
LPC214X_USBDEV_CMDCODE);
/* Wait until the command register is empty
* (CCEMPTY != 0, command is accepted)
*/
while ((lpc214x_getreg(LPC214X_USBDEV_DEVINTST) &
USBDEV_DEVINT_CCEMTY) == 0);
/* Clear command register empty (CCEMPTY) interrupt */
lpc214x_putreg(USBDEV_DEVINT_CCEMTY, LPC214X_USBDEV_DEVINTCLR);
/* Determine next phase of the command */
switch (cmd)
{
/* Write operations (1 byte of data) */
case CMD_USB_DEV_SETADDRESS:
case CMD_USB_DEV_CONFIG:
case CMD_USB_DEV_SETMODE:
case CMD_USB_DEV_SETSTATUS:
{
/* Send data + WR and wait for CCEMPTY */
lpc214x_putreg((data << 16) + CMD_USB_DATAWR,
LPC214X_USBDEV_CMDCODE);
while ((lpc214x_getreg(LPC214X_USBDEV_DEVINTST) &
USBDEV_DEVINT_CCEMTY) == 0);
}
break;
/* 16 bit read operations */
case CMD_USB_DEV_READFRAMENO:
case CMD_USB_DEV_READTESTREG:
{
/* Send command code + RD and wait for CDFULL */
lpc214x_putreg((cmd << 16) + CMD_USB_DATARD,
LPC214X_USBDEV_CMDCODE);
while ((lpc214x_getreg(LPC214X_USBDEV_DEVINTST) &
USBDEV_DEVINT_CDFULL) == 0);
/* Clear CDFULL and read LS data */
lpc214x_putreg(USBDEV_DEVINT_CDFULL, LPC214X_USBDEV_DEVINTCLR);
tmp = lpc214x_getreg(LPC214X_USBDEV_CMDDATA);
/* Send command code + RD and wait for CDFULL */
lpc214x_putreg((cmd << 16) + CMD_USB_DATARD,
LPC214X_USBDEV_CMDCODE);
while ((lpc214x_getreg(LPC214X_USBDEV_DEVINTST) &
USBDEV_DEVINT_CDFULL) == 0);
/* Read MS data */
tmp |= lpc214x_getreg(LPC214X_USBDEV_CMDDATA) << 8;
}
break;
/* 8-bit read operations */
case CMD_USB_DEV_GETSTATUS:
case CMD_USB_DEV_GETERRORCODE:
case CMD_USB_DEV_READERRORSTATUS:
case CMD_USB_EP_CLRBUFFER:
{
/* Send command code + RD and wait for CDFULL */
lpc214x_putreg((cmd << 16) + CMD_USB_DATARD,
LPC214X_USBDEV_CMDCODE);
while ((lpc214x_getreg(LPC214X_USBDEV_DEVINTST) &
USBDEV_DEVINT_CDFULL) == 0);
/* Read data */
tmp = lpc214x_getreg(LPC214X_USBDEV_CMDDATA);
}
break;
/* No data transfer */
case CMD_USB_EP_VALIDATEBUFFER:
break;
default:
switch (cmd & 0x1e0)
{
case CMD_USB_EP_SELECT:
case CMD_USB_EP_SELECTCLEAR:
{
/* Send command code + RD and wait for CDFULL */
lpc214x_putreg((cmd << 16) + CMD_USB_DATARD,
LPC214X_USBDEV_CMDCODE);
while ((lpc214x_getreg(LPC214X_USBDEV_DEVINTST) &
USBDEV_DEVINT_CDFULL) == 0);
/* Read data */
tmp = lpc214x_getreg(LPC214X_USBDEV_CMDDATA);
}
break;
case CMD_USB_EP_SETSTATUS:
{
/* Send data + RD and wait for CCEMPTY */
lpc214x_putreg((data << 16) + CMD_USB_DATAWR,
LPC214X_USBDEV_CMDCODE);
while ((lpc214x_getreg(LPC214X_USBDEV_DEVINTST) &
USBDEV_DEVINT_CCEMTY) == 0);
}
break;
default:
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_INVALIDCMD), 0);
break;
}
break;
}
/* Restore the interrupt flags */
leave_critical_section(flags);
return tmp;
}
/****************************************************************************
* Name: lpc214x_rqdequeue
*
* Description:
* Remove a request from an endpoint request queue
*
****************************************************************************/
static struct lpc214x_req_s *lpc214x_rqdequeue(struct lpc214x_ep_s *privep)
{
struct lpc214x_req_s *ret = privep->head;
if (ret)
{
privep->head = ret->flink;
if (!privep->head)
{
privep->tail = NULL;
}
ret->flink = NULL;
}
return ret;
}
/****************************************************************************
* Name: lpc214x_rqenqueue
*
* Description:
* Add a request from an endpoint request queue
*
****************************************************************************/
static void lpc214x_rqenqueue(struct lpc214x_ep_s *privep,
struct lpc214x_req_s *req)
{
req->flink = NULL;
if (!privep->head)
{
privep->head = req;
privep->tail = req;
}
else
{
privep->tail->flink = req;
privep->tail = req;
}
}
/****************************************************************************
* Name: lpc214x_epwrite
*
* Description:
* Endpoint write (IN)
*
****************************************************************************/
static void lpc214x_epwrite(uint8_t epphy,
const uint8_t *data, uint32_t nbytes)
{
uint32_t value;
bool aligned = (((uint32_t)data & 3) == 0);
/* Set the write enable bit for this physical EP address. Bits 2-5 are
* the logical endpoint number (0-15)
*/
lpc214x_putreg(((epphy << 1) & LPC214X_USBCTRL_EPMASK) |
LPC214X_USBCTRL_WREN, LPC214X_USBDEV_CTRL);
/* Set the transmit packet length (nbytes must be less than 2048) */
lpc214x_putreg(nbytes, LPC214X_USBDEV_TXPLEN);
/* Transfer the packet data */
do
{
/* Zero length packets are a special case */
if (nbytes)
{
if (aligned)
{
value = *(uint32_t *)data;
}
else
{
value = (uint32_t)data[0] | ((uint32_t)data[1] << 8) |
((uint32_t)data[2] << 16) | ((uint32_t)data[3] << 24);
}
lpc214x_putreg(value, LPC214X_USBDEV_TXDATA);
data += 4;
}
else
{
/* Zero length packet */
lpc214x_putreg(0, LPC214X_USBDEV_TXDATA);
}
}
while ((lpc214x_getreg(LPC214X_USBDEV_CTRL) & LPC214X_USBCTRL_WREN) != 0);
/* Done */
lpc214x_putreg(0, LPC214X_USBDEV_CTRL);
lpc214x_usbcmd(CMD_USB_EP_SELECT | epphy, 0);
lpc214x_usbcmd(CMD_USB_EP_VALIDATEBUFFER, 0);
}
/****************************************************************************
* Name: lpc214x_epread
*
* Description:
* Endpoint read (OUT)
*
****************************************************************************/
static int lpc214x_epread(uint8_t epphy, uint8_t *data, uint32_t nbytes)
{
uint32_t pktlen;
uint32_t result;
uint32_t value;
uint8_t aligned = 0;
/* If data is NULL, then we are being asked to read but discard the data.
* For most cases, the resulting buffer will be aligned and we will be
* able to do faster 32-bit transfers.
*/
if (data)
{
if (((uint32_t)data & 3) == 0)
{
aligned = 1;
}
else
{
aligned = 2;
}
}
/* Set the read enable bit for this physical EP address. Bits 2-5 are
* the logical endpoint number (0-15).
*/
lpc214x_putreg(((epphy << 1) & LPC214X_USBCTRL_EPMASK) |
LPC214X_USBCTRL_RDEN, LPC214X_USBDEV_CTRL);
/* Wait for packet buffer ready for reading */
while ((lpc214x_getreg(LPC214X_USBDEV_RXPLEN) &
USBDEV_RXPLEN_PKTRDY) == 0);
/* Get the number of bytes of data to be read */
pktlen = lpc214x_getreg(LPC214X_USBDEV_RXPLEN) &
USBDEV_RXPLEN_PKTLENGTH;
/* Read data from input buffer while read data is valid (DV) */
while ((lpc214x_getreg(LPC214X_USBDEV_RXPLEN) &
USBDEV_RXPLEN_DV) != 0)
{
value = lpc214x_getreg(LPC214X_USBDEV_RXDATA);
if (aligned == 1)
{
*(uint32_t *)data = value;
data += 4;
}
else if (aligned == 2)
{
*data++ = (uint8_t)value;
*data++ = (uint8_t)(value >> 8);
*data++ = (uint8_t)(value >> 16);
*data++ = (uint8_t)(value >> 24);
}
}
/* Done */
lpc214x_putreg(0, LPC214X_USBDEV_CTRL);
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 received 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_abortrequest
*
* Description:
* Discard a request
*
****************************************************************************/
static inline void lpc214x_abortrequest(struct lpc214x_ep_s *privep,
struct lpc214x_req_s *privreq,
int16_t result)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_REQABORTED),
(uint16_t)privep->epphy);
/* Save the result in the request structure */
privreq->req.result = result;
/* Callback to the request completion handler */
privreq->req.callback(&privep->ep, &privreq->req);
}
/****************************************************************************
* Name: lpc214x_reqcomplete
*
* Description:
* Handle termination of the request at the head of the endpoint request
* queue.
*
****************************************************************************/
static void lpc214x_reqcomplete(struct lpc214x_ep_s *privep, int16_t result)
{
struct lpc214x_req_s *privreq;
int stalled = privep->stalled;
irqstate_t flags;
/* Remove the completed request at the head of the endpoint request list */
flags = enter_critical_section();
privreq = lpc214x_rqdequeue(privep);
leave_critical_section(flags);
if (privreq)
{
/* If endpoint 0, temporarily reflect the state of protocol stalled
* in the callback.
*/
if (privep->epphy == LPC214X_EP0_IN)
{
privep->stalled = privep->dev->stalled;
}
/* Save the result in the request structure */
privreq->req.result = result;
/* Callback to the request completion handler */
privreq->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
*
****************************************************************************/
static int lpc214x_wrrequest(struct lpc214x_ep_s *privep)
{
struct lpc214x_req_s *privreq;
uint8_t *buf;
int nbytes;
int bytesleft;
/* Check the request from the head of the endpoint request queue */
privreq = lpc214x_rqpeek(privep);
if (!privreq)
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EPINQEMPTY), 0);
return OK;
}
uinfo("epphy=%d req=%p: len=%zu xfrd=%zu nullpkt=%d\n",
privep->epphy, privreq, privreq->req.len, privreq->req.xfrd,
privep->txnullpkt);
/* Ignore any attempt to send a zero length packet on anything but EP0IN */
if (privreq->req.len == 0)
{
if (privep->epphy == LPC214X_EP0_IN)
{
lpc214x_epwrite(LPC214X_EP0_IN, NULL, 0);
}
else
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_EPINNULLPACKET), 0);
}
/* In any event, the request is complete */
lpc214x_reqcomplete(privep, OK);
return OK;
}
/* Otherwise send the data in the packet (in the DMA on case, we
* may be resuming transfer already in progress.
*/
#warning REVISIT... If the EP supports double buffering, then we can do better
/* Get the number of bytes left to be sent in the packet */
bytesleft = privreq->req.len - privreq->req.xfrd;
/* Send the next packet if (1) there are more bytes to be sent, or
* (2) the last packet sent was exactly maxpacketsize (bytesleft == 0)
*/
usbtrace(TRACE_WRITE(privep->epphy), privreq->req.xfrd);
if (bytesleft > 0 || privep->txnullpkt)
{
/* Indicate that there is data in the TX FIFO. This will be cleared
* when the EPIN interrupt is received
*/
privep->txbusy = 1;
/* Try to send maxpacketsize -- unless we don't have that many
* bytes to send.
*/
privep->txnullpkt = 0;
if (bytesleft > privep->ep.maxpacket)
{
nbytes = privep->ep.maxpacket;
}
else
{
nbytes = bytesleft;
if ((privreq->req.flags & USBDEV_REQFLAGS_NULLPKT) != 0)
{
privep->txnullpkt = (bytesleft == privep->ep.maxpacket);
}
}
/* 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;
}
/* If all of the bytes were sent (including any final null packet)
* then we are finished with the transfer
*/
if (privreq->req.xfrd >= privreq->req.len && !privep->txnullpkt)
{
usbtrace(TRACE_COMPLETE(privep->epphy), privreq->req.xfrd);
privep->txnullpkt = 0;
lpc214x_reqcomplete(privep, OK);
}
return OK;
}
/****************************************************************************
* 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;
uint8_t *buf;
int nbytesread;
/* Check the request from the head of the endpoint request queue */
privreq = lpc214x_rqpeek(privep);
if (!privreq)
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EPOUTQEMPTY), 0);
return OK;
}
uinfo("len=%zu xfrd=%zu nullpkt=%d\n",
privreq->req.len, privreq->req.xfrd, privep->txnullpkt);
/* Ignore any attempt to receive a zero length packet */
if (privreq->req.len == 0)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_EPOUTNULLPACKET), 0);
lpc214x_reqcomplete(privep, OK);
return OK;
}
usbtrace(TRACE_READ(privep->epphy), privreq->req.xfrd);
/* Receive the next packet */
buf = privreq->req.buf + privreq->req.xfrd;
nbytesread = lpc214x_epread(privep->epphy, buf, privep->ep.maxpacket);
if (nbytesread < 0)
{
usbtrace(TRACE_DEVERROR(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.xfrd >= privreq->req.len ||
nbytesread < privep->ep.maxpacket)
{
usbtrace(TRACE_COMPLETE(privep->epphy), privreq->req.xfrd);
lpc214x_reqcomplete(privep, OK);
}
return OK;
}
/****************************************************************************
* Name: lpc214x_cancelrequests
*
* Description:
* Cancel all pending requests for an endpoint
*
****************************************************************************/
static void lpc214x_cancelrequests(struct lpc214x_ep_s *privep)
{
while (!lpc214x_rqempty(privep))
{
usbtrace(TRACE_COMPLETE(privep->epphy),
(lpc214x_rqpeek(privep))->req.xfrd);
lpc214x_reqcomplete(privep, -ESHUTDOWN);
}
}
/****************************************************************************
* Name: lpc214x_epfindbyaddr
*
* Description:
* Find the physical endpoint structure corresponding to a logic endpoint
* address
*
****************************************************************************/
static struct
lpc214x_ep_s *lpc214x_epfindbyaddr(struct lpc214x_usbdev_s *priv,
uint16_t eplog)
{
struct lpc214x_ep_s *privep;
int i;
/* Endpoint zero is a special case */
if (USB_EPNO(eplog) == 0)
{
return &priv->eplist[0];
}
/* Handle the remaining */
for (i = 1; i < LPC214X_NPHYSENDPOINTS; i++)
{
privep = &priv->eplist[i];
/* Same logical endpoint number? (includes direction bit) */
if (eplog == privep->ep.eplog)
{
/* Return endpoint found */
return privep;
}
}
/* Return endpoint not found */
return NULL;
}
/****************************************************************************
* Name: lpc214x_eprealize
*
* Description:
* Enable or disable an endpoint
*
****************************************************************************/
static void lpc214x_eprealize(struct lpc214x_ep_s *privep,
bool prio, uint32_t packetsize)
{
struct lpc214x_usbdev_s *priv = privep->dev;
uint32_t mask;
uint32_t 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 */
lpc214x_putreg(USBDEV_DEVINT_EPRLZED, LPC214X_USBDEV_DEVINTCLR);
/* Realize the endpoint */
reg = lpc214x_getreg(LPC214X_USBDEV_REEP);
reg |= (1 << privep->epphy);
lpc214x_putreg(reg, LPC214X_USBDEV_REEP);
/* Set endpoint maximum packet size */
lpc214x_putreg(privep->epphy, LPC214X_USBDEV_EPIND);
lpc214x_putreg(packetsize, LPC214X_USBDEV_MAXPSIZE);
/* Wait for Realize complete */
while ((lpc214x_getreg(LPC214X_USBDEV_DEVINTST) &
USBDEV_DEVINT_EPRLZED) == 0);
/* Clear realize interrupt bit */
lpc214x_putreg(USBDEV_DEVINT_EPRLZED, LPC214X_USBDEV_DEVINTCLR);
}
/****************************************************************************
* Name: lpc214x_epclrinterrupt
*
* Description:
* Clear the EP interrupt flag and return the current EP status
*
****************************************************************************/
static uint8_t lpc214x_epclrinterrupt(uint8_t epphy)
{
/* Clear the endpoint interrupt */
lpc214x_putreg(1 << epphy, LPC214X_USBDEV_EPINTCLR);
/* Wait for data in the command data register */
while ((lpc214x_getreg(LPC214X_USBDEV_DEVINTST) &
USBDEV_DEVINT_CDFULL) == 0);
/* Return the value of the command data register */
return lpc214x_getreg(LPC214X_USBDEV_CMDDATA);
}
/****************************************************************************
* Name: lpc214x_ep0configure
*
* Description:
* Configure endpoint 0
*
****************************************************************************/
static inline void lpc214x_ep0configure(struct lpc214x_usbdev_s *priv)
{
uint32_t 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 = lpc214x_getreg(LPC214X_USBDEV_EPINTEN);
inten |= 3; /* EP0 Rx and Tx */
lpc214x_putreg(inten, LPC214X_USBDEV_EPINTEN);
}
/****************************************************************************
* Name: lpc214x_dmareset
*
* Description: Reset USB DMA
*
****************************************************************************/
#ifdef CONFIG_LPC214X_USBDEV_DMA
static inline void lpc214x_dmareset(uint32_t enable)
{
int i;
/* Disable All DMA interrupts */
lpc214x_putreg(0, LPC214X_USBDEV_DMAINTEN);
/* DMA Disable */
lpc214x_putreg(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 */
lpc214x_putreg((uint32_t)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 */
lpc214x_putreg(enable, LPC214X_USBDEV_DMAINTEN);
}
#endif
/****************************************************************************
* Name: lpc214x_usbreset
*
* Description:
* Reset Usb engine
*
****************************************************************************/
static void lpc214x_usbreset(struct lpc214x_usbdev_s *priv)
{
int epphy;
/* Disable all endpoint interrupts */
lpc214x_putreg(0, LPC214X_USBDEV_EPINTEN);
/* Frame is Hp interrupt */
lpc214x_putreg(1, LPC214X_USBDEV_DEVINTPRI);
/* Clear all pending interrupts */
lpc214x_putreg(0xffffffff, LPC214X_USBDEV_EPINTCLR);
lpc214x_putreg(0xffffffff, LPC214X_USBDEV_DEVINTCLR);
/* Periperhal address is needed */
priv->paddrset = 0;
/* Reset endpoints */
for (epphy = 0; epphy < LPC214X_NPHYSENDPOINTS; epphy++)
{
struct lpc214x_ep_s *privep = &priv->eplist[epphy];
lpc214x_cancelrequests(privep);
/* Reset endpoint status */
privep->stalled = false;
}
/* Tell the class driver that we are disconnected. The class
* driver should then accept any new configurations.
*/
if (priv->driver)
{
CLASS_DISCONNECT(priv->driver, &priv->usbdev);
}
/* Endpoints not yet configured */
lpc214x_usbcmd(CMD_USB_DEV_CONFIG, 0);
/* EndPoint 0 initialization */
lpc214x_ep0configure(priv);
/* Enable End_of_Transfer_Interrupt and System_Error_Interrupt USB DMA
* interrupts
*/
#ifdef CONFIG_LPC214X_USBDEV_DMA
lpc214x_dmareset(CONFIG_LPC214X_USBDEV_DMAINTMASK);
#endif
/* Enable Device interrupts */
lpc214x_putreg(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 *ctrl)
{
int ret;
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_DISPATCH), 0);
if (priv && priv->driver)
{
/* Forward to the control request to the class driver implementation */
ret = CLASS_SETUP(priv->driver, &priv->usbdev, ctrl, NULL, 0);
if (ret < 0)
{
/* Stall on failure */
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_DISPATCHSTALL), 0);
priv->stalled = 1;
}
}
}
/****************************************************************************
* Name: lpc214x_ep0setup
*
* Description:
* USB Ctrl EP Setup Event. This is logically part of the USB interrupt
* handler. This event occurs when a setup packet is receive on EP0 OUT.
*
****************************************************************************/
static inline void lpc214x_ep0setup(struct lpc214x_usbdev_s *priv)
{
struct lpc214x_ep_s *ep0 = &priv->eplist[LPC214X_EP0_OUT];
struct lpc214x_ep_s *privep;
struct lpc214x_req_s *privreq = lpc214x_rqpeek(ep0);
struct usb_ctrlreq_s ctrl;
uint16_t value;
uint16_t index;
uint16_t len;
uint8_t 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 (!lpc214x_rqempty(ep0))
{
int16_t 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,
(uint8_t *)&ctrl, USB_SIZEOF_CTRLREQ);
if (ret <= 0)
{
return;
}
/* And extract the little-endian 16-bit values to host order */
value = GETUINT16(ctrl.value);
index = GETUINT16(ctrl.index);
len = GETUINT16(ctrl.len);
uinfo("type=%02x req=%02x value=%04x index=%04x len=%04x\n",
ctrl.type, ctrl.req, value, index, len);
/* Dispatch any non-standard requests */
if ((ctrl.type & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_STANDARD)
{
lpc214x_dispatchrequest(priv, &ctrl);
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 (ctrl.req)
{
case USB_REQ_GETSTATUS:
{
/* type: device-to-host; recipient = device, interface, endpoint
* value: 0
* index: zero interface endpoint
* len: 2; data = status
*/
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_GETSTATUS), 0);
if (!priv->paddrset || len != 2 ||
(ctrl.type & USB_REQ_DIR_IN) == 0 || value != 0)
{
priv->stalled = 1;
}
else
{
switch (ctrl.type & USB_REQ_RECIPIENT_MASK)
{
case USB_REQ_RECIPIENT_ENDPOINT:
{
usbtrace(TRACE_INTDECODE(
LPC214X_TRACEINTID_EPGETSTATUS), 0);
privep = lpc214x_epfindbyaddr(priv, index);
if (!privep)
{
usbtrace(TRACE_DEVERROR(
LPC214X_TRACEERR_BADEPGETSTATUS), 0);
priv->stalled = 1;
}
else
{
if ((lpc214x_usbcmd(CMD_USB_EP_SELECT |
privep->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;
}
}
break;
case USB_REQ_RECIPIENT_DEVICE:
{
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
{
usbtrace(TRACE_DEVERROR(
LPC214X_TRACEERR_BADDEVGETSTATUS), 0);
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:
{
usbtrace(TRACE_DEVERROR(
LPC214X_TRACEERR_BADGETSTATUS), 0);
priv->stalled = 1;
}
break;
}
}
}
break;
case USB_REQ_CLEARFEATURE:
{
/* type: host-to-device; recipient = device, interface or endpoint
* value: feature selector
* index: zero interface endpoint;
* len: zero, data = none
*/
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_CLEARFEATURE), 0);
if ((ctrl.type & USB_REQ_RECIPIENT_MASK) !=
USB_REQ_RECIPIENT_ENDPOINT)
{
lpc214x_dispatchrequest(priv, &ctrl);
}
else if (priv->paddrset != 0 && value ==
USB_FEATURE_ENDPOINTHALT && len == 0 &&
(privep = lpc214x_epfindbyaddr(priv, index)) != NULL)
{
privep->halted = 0;
lpc214x_epstall(&privep->ep, true);
lpc214x_epwrite(LPC214X_EP0_IN, NULL, 0);
priv->ep0state = LPC214X_EP0STATUSIN;
}
else
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_BADCLEARFEATURE), 0);
priv->stalled = 1;
}
}
break;
case USB_REQ_SETFEATURE:
{
/* type: host-to-device; recipient = device, interface, endpoint
* value: feature selector
* index: zero interface endpoint;
* len: 0; data = none
*/
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_SETFEATURE), 0);
if (((ctrl.type & USB_REQ_RECIPIENT_MASK) ==
USB_REQ_RECIPIENT_DEVICE) &&
value == USB_FEATURE_TESTMODE)
{
uinfo("test mode: %d\n", index);
}
else if ((ctrl.type & USB_REQ_RECIPIENT_MASK) !=
USB_REQ_RECIPIENT_ENDPOINT)
{
lpc214x_dispatchrequest(priv, &ctrl);
}
else if (priv->paddrset != 0 && value == USB_FEATURE_ENDPOINTHALT &&
len == 0 && (privep = lpc214x_epfindbyaddr(priv, index)) !=
NULL)
{
privep->halted = 1;
lpc214x_epwrite(LPC214X_EP0_IN, NULL, 0);
priv->ep0state = LPC214X_EP0STATUSIN;
}
else
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_BADSETFEATURE), 0);
priv->stalled = 1;
}
}
break;
case USB_REQ_SETADDRESS:
{
/* type: host-to-device; recipient = device
* value: device address
* index: 0
* len: 0; data = none
*/
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EP0SETUPSETADDRESS),
value);
if ((ctrl.type & USB_REQ_RECIPIENT_MASK) ==
USB_REQ_RECIPIENT_DEVICE &&
index == 0 && len == 0 && value < 128)
{
/* Save the address. We cannot actually change to the next
* address until the completion of the status phase.
*/
priv->paddr = ctrl.value[0];
/* Note that if we send the SETADDRESS command twice, that will
* force the address change. Otherwise, the hardware will
* automatically set the address at the end of the status phase.
*/
lpc214x_usbcmd(CMD_USB_DEV_SETADDRESS,
CMD_USB_SETADDRESS_DEVEN | priv->paddr);
/* Send a NULL packet. The status phase completes when the null
* packet has been sent successfully.
*/
lpc214x_epwrite(LPC214X_EP0_IN, NULL, 0);
priv->ep0state = LPC214X_EP0SETADDRESS;
}
else
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_BADSETADDRESS), 0);
priv->stalled = 1;
}
}
break;
case USB_REQ_GETDESCRIPTOR:
/* type: device-to-host; recipient = device
* value: descriptor type and index
* index: 0 or language ID;
* len: descriptor len; data = descriptor
*/
case USB_REQ_SETDESCRIPTOR:
/* type: host-to-device; recipient = device
* value: descriptor type and index
* index: 0 or language ID;
* len: descriptor len; data = descriptor
*/
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_GETSETDESC), 0);
if ((ctrl.type & USB_REQ_RECIPIENT_MASK) == USB_REQ_RECIPIENT_DEVICE)
{
lpc214x_dispatchrequest(priv, &ctrl);
}
else
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_BADGETSETDESC), 0);
priv->stalled = 1;
}
}
break;
case USB_REQ_GETCONFIGURATION:
/* type: device-to-host; recipient = device
* value: 0;
* index: 0;
* len: 1; data = configuration value
*/
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_GETCONFIG), 0);
if (priv->paddrset &&
(ctrl.type & USB_REQ_RECIPIENT_MASK) ==
USB_REQ_RECIPIENT_DEVICE &&
value == 0 && index == 0 && len == 1)
{
lpc214x_dispatchrequest(priv, &ctrl);
}
else
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_BADGETCONFIG), 0);
priv->stalled = 1;
}
}
break;
case USB_REQ_SETCONFIGURATION:
/* type: host-to-device; recipient = device
* value: configuration value
* index: 0;
* len: 0; data = none
*/
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_SETCONFIG), 0);
if ((ctrl.type & USB_REQ_RECIPIENT_MASK) ==
USB_REQ_RECIPIENT_DEVICE &&
index == 0 && len == 0)
{
lpc214x_dispatchrequest(priv, &ctrl);
}
else
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_BADSETCONFIG), 0);
priv->stalled = 1;
}
}
break;
case USB_REQ_GETINTERFACE:
/* type: device-to-host; recipient = interface
* value: 0
* index: interface;
* len: 1; data = alt interface
*/
case USB_REQ_SETINTERFACE:
/* type: host-to-device; recipient = interface
* value: alternate setting
* index: interface;
* len: 0; data = none
*/
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_GETSETIF), 0);
lpc214x_dispatchrequest(priv, &ctrl);
}
break;
case USB_REQ_SYNCHFRAME:
/* type: device-to-host; recipient = endpoint
* value: 0
* index: endpoint;
* len: 2; data = frame number
*/
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_SYNCHFRAME), 0);
}
break;
default:
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_INVALIDCTRLREQ), 0);
priv->stalled = 1;
}
break;
}
if (priv->stalled)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_EP0SETUPSTALLED),
priv->ep0state);
ep0 = &priv->eplist[LPC214X_EP0_OUT];
lpc214x_epstall(&ep0->ep, false);
ep0 = &priv->eplist[LPC214X_EP0_IN];
lpc214x_epstall(&ep0->ep, false);
}
}
/****************************************************************************
* Name: lpc214x_ep0dataoutinterrupt
*
* Description:
* USB Ctrl EP Data OUT Event. This is logically part of the USB interrupt
* handler. Each non-isochronous OUT endpoint gives an interrupt when they
* receive a packet without error.
*
****************************************************************************/
static inline void lpc214x_ep0dataoutinterrupt(struct lpc214x_usbdev_s *priv)
{
struct lpc214x_ep_s *ep0;
uint32_t pktlen;
/* Copy new setup packet into 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_EP0REQUEST;
pktlen = lpc214x_epread(LPC214X_EP0_OUT,
NULL, CONFIG_USBDEV_EP0_MAXSIZE);
if (LPC214X_READOVERRUN(pktlen))
{
lpc214x_ep0setup(priv);
}
}
break;
case LPC214X_EP0REQUEST:
{
/* Process the next request action (if any) */
lpc214x_rdrequest(&priv->eplist[LPC214X_EP0_OUT]);
}
break;
default:
priv->stalled = 1;
break;
}
if (priv->stalled)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_EP0OUTSTALLED),
priv->ep0state);
ep0 = &priv->eplist[LPC214X_EP0_OUT];
lpc214x_epstall(&ep0->ep, false);
ep0 = &priv->eplist[LPC214X_EP0_IN];
lpc214x_epstall(&ep0->ep, false);
}
}
/****************************************************************************
* Name: lpc214x_ep0dataininterrupt
*
* Description:
* USB Ctrl EP Data IN Event. This is logically part of the USB interrupt
* handler. All non-isochronous IN endpoints give this interrupt when a
* packet is successfully transmitted (OR a NAK handshake is sent on the
* bus provided that the interrupt on NAK feature is enabled).
*
****************************************************************************/
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_EP0REQUEST;
break;
case LPC214X_EP0SHORTWRITE:
priv->ep0state = LPC214X_EP0SHORTWRSENT;
break;
case LPC214X_EP0SETADDRESS:
{
/* If the address was set to a non-zero value, then thiscompletes the
* default phase, and begins the address phase
* (still not fully configured)
*/
usbtrace(TRACE_INTDECODE(
LPC214X_TRACEINTID_EP0INSETADDRESS),
(uint16_t)priv->paddr);
lpc214x_usbcmd(CMD_USB_DEV_CONFIG, 0);
if (priv->paddr)
{
priv->paddrset = 1;
priv->ep0state = LPC214X_EP0REQUEST;
}
}
break;
case LPC214X_EP0REQUEST:
{
/* Process the next request action (if any) */
ep0 = &priv->eplist[LPC214X_EP0_IN];
ep0->txbusy = 0;
lpc214x_wrrequest(ep0);
}
break;
default:
priv->stalled = 1;
break;
}
if (priv->stalled)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_EP0INSTALLED),
priv->ep0state);
ep0 = &priv->eplist[LPC214X_EP0_OUT];
lpc214x_epstall(&ep0->ep, false);
ep0 = &priv->eplist[LPC214X_EP0_IN];
lpc214x_epstall(&ep0->ep, false);
}
}
/****************************************************************************
* Name: lpc214x_usbinterrupt
*
* Description:
* USB interrupt handler
*
****************************************************************************/
static int lpc214x_usbinterrupt(int irq,
void *context, void *arg)
{
struct lpc214x_usbdev_s *priv = &g_usbdev;
struct lpc214x_ep_s *privep ;
uint32_t devintstatus; /* Sampled state of the device interrupt status register */
uint32_t epintstatus; /* Sampled state of the endpoint interrupt status register */
#ifdef CONFIG_LPC214X_USBDEV_DMA
uint32_t dmaintstatus; /* Sampled state of dma interrupt status register */
#endif
uint32_t softprio; /* Current priority interrupt bitset */
uint32_t pending; /* Pending subset of priority interrupt bitset */
uint8_t epphy; /* Physical endpoint number being processed */
int i;
usbtrace(TRACE_INTENTRY(LPC214X_TRACEINTID_USB), 0);
/* Read the device interrupt status register */
devintstatus = lpc214x_getreg(LPC214X_USBDEV_DEVINTST);
#ifdef CONFIG_LPC214X_USBDEV_DMA
/* Check for low priority and high priority (non-DMA) interrupts */
if ((lpc214x_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 */
lpc214x_putreg(USBDEV_DEVINT_EPFAST,
LPC214X_USBDEV_DEVINTCLR);
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EPFAST), 0);
/* Do what? */
}
#endif
#ifdef CONFIG_DEBUG_FEATURES
/* USB engine error interrupt */
if ((devintstatus & USBDEV_DEVINT_EPRINT))
{
uint8_t errcode;
/* Clear the error interrupt */
lpc214x_putreg(USBDEV_DEVINT_EPRINT,
LPC214X_USBDEV_DEVINTCLR);
/* And show what error occurred */
errcode = (uint8_t)lpc214x_usbcmd(
CMD_USB_DEV_READERRORSTATUS, 0) & 0x0f;
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EPRINT),
(uint16_t)errcode);
UNUSED(errcode);
}
#endif
#ifdef CONFIG_LPC214X_USBDEV_FRAME_INTERRUPT
/* Frame interrupt */
if ((devintstatus & USBDEV_DEVINT_FRAME) != 0)
{
/* Clear the frame interrupt */
lpc214x_putreg(USBDEV_DEVINT_FRAME, LPC214X_USBDEV_DEVINTCLR);
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_FRAME), 0);
/* Then read the start of frame value */
priv->sof = (uint16_t)lpc214x_usbcmd(CMD_USB_DEV_READFRAMENO, 0);
}
#endif
/* Device Status interrupt */
if ((devintstatus & USBDEV_DEVINT_DEVSTAT) != 0)
{
/* Clear Device status interrupt */
lpc214x_putreg(USBDEV_DEVINT_DEVSTAT, LPC214X_USBDEV_DEVINTCLR);
/* Get device status */
g_usbdev.devstatus = (uint8_t)lpc214x_usbcmd(
CMD_USB_DEV_GETSTATUS, 0);
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_DEVSTAT),
(uint16_t)g_usbdev.devstatus);
/* Device connection status */
if (DEVSTATUS_CONNCHG(g_usbdev.devstatus))
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_CONNECTCHG),
(uint16_t)g_usbdev.devstatus);
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),
(uint16_t)g_usbdev.devstatus);
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),
(uint16_t)g_usbdev.devstatus);
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),
(uint16_t)g_usbdev.devstatus);
/* Inform the Class driver of the change */
if (priv->driver)
{
if (DEVSTATUS_SUSPEND(g_usbdev.devstatus))
{
CLASS_SUSPEND(priv->driver, &priv->usbdev);
}
else
{
CLASS_RESUME(priv->driver, &priv->usbdev);
}
}
/* TODO: Perform power management operations here. */
}
/* Device reset */
if (DEVSTATUS_RESET(g_usbdev.devstatus))
{
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_DEVRESET),
(uint16_t)g_usbdev.devstatus);
lpc214x_usbreset(priv);
}
}
/* Slow EP interrupt */
if ((devintstatus & USBDEV_DEVINT_EPSLOW) != 0)
{
/* Clear Slow EP interrupt */
lpc214x_putreg(USBDEV_DEVINT_EPSLOW, LPC214X_USBDEV_DEVINTCLR);
usbtrace(TRACE_INTDECODE(LPC214X_TRACEINTID_EPSLOW), 0);
do
{
/* Read the endpoint interrupt status register */
epintstatus = lpc214x_getreg(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 through 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_t result = lpc214x_epclrinterrupt(
LPC214X_CTRLEP_OUT);
if (result & USBDEV_EPSETUPPACKET)
{
usbtrace(TRACE_INTDECODE(
LPC214X_TRACEINTID_EP0SETUP),
(uint16_t)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);
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 */
lpc214x_epclrinterrupt(epphy);
/* Get the endpoint structure 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_t)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 any)
*/
privep->txbusy = 0;
lpc214x_wrrequest(privep);
}
else
{
/* OUT: host-to-device */
usbtrace(TRACE_INTDECODE(
LPC214X_TRACEINTID_EPIN),
(uint16_t)epphy);
/* Read host data into the current read
* request
*/
if (!lpc214x_rqempty(privep))
{
lpc214x_rdrequest(privep);
}
else
{
uinfo("Pending data on OUT endpoint\n");
priv->rxpending = 1;
}
}
}
}
}
}
while (epintstatus);
}
#ifdef CONFIG_LPC214X_USBDEV_DMA
}
/* Check for DMA interrupts */
if ((lpc214x_getreg(LPC214X_USBDEV_INTST) &
USBDEV_INTST_REQDMA) != 0)
{
/* First Software High priority and then low priority */
uint32_t tmp;
/* Collect the DMA interrupt sources */
dmaintstatus = 0;
tmp = lpc214x_getreg(LPC214X_USBDEV_EOTINTST);
if (lpc214x_getreg(LPC214X_USBDEV_DMAINTEN) & 1)
{
dmaintstatus |= tmp;
}
lpc214x_putreg(tmp, LPC214X_USBDEV_EOTINTCLR);
tmp = lpc214x_getreg(LPC214X_USBDEV_NDDRINTST);
if (lpc214x_getreg(LPC214X_USBDEV_DMAINTEN) & 2)
{
dmaintstatus |= tmp;
}
lpc214x_putreg(tmp, LPC214X_USBDEV_NDDRINTCLR);
tmp = lpc214x_getreg(LPC214X_USBDEV_SYSERRINTST);
if (lpc214x_getreg(LPC214X_USBDEV_DMAINTEN) & 4)
{
dmaintstatus |= tmp;
}
lpc214x_putreg(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 through 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_t)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, uint8_t epphy,
uint32_t epmaxsize, uint32_t nbytes,
uint32_t *isocpacket,
bool isochronous);
{
struct lpc214x_dmadesc_s *dmadesc = priv;
uint32_t reg;
#ifdef CONFIG_DEBUG_FEATURES
if (!priv || epphy < 2)
{
usbtrace(TRACE_DEVERROR(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_DEVERROR(LPC214X_TRACEERR_NODMADESC), 0);
return -EBUSY;
}
/* Verify that the DMA descriptor is available */
if ((dmadesc->status & USB_DMADESC_STATUSMASK) ==
USB_DMADESC_BEINGSERVICED)
{
usbtrace(TRACE_DEVERROR(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_t)&dmadesc->buffer;
dmadesc->status = 0;
#ifdef CONFIG_USBDEV_ISOCHRONOUS
dmadesc->size = (uint32_t)packet;
#endif
/* Enable DMA transfer 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 ((LPC214X_EPPHYIN(epphy) && (reg & 0x60) == 0) ||
(LPC214X_EPPHYOUT(epphy) && (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(uint8_t epphy, uint32_t descndx)
{
uint32_t reg;
/* Clear DMA descriptor status */
g_usbddesc[descndx].status = 0;
/* Enable DMA transfer on the endpoint */
lpc214x_putreg(1 << epph, LPC214X_USBDEV_EPDMAEN);
/* Check the state of IN/OUT EP buffer */
uint32_t reg = lpc214x_usbcmd(CMD_USB_EP_SELECT | epphy, 0);
if ((LPC214X_EPPHYIN(epphy) && (reg & 0x60) == 0) ||
(LPC214X_EPPHYIN(epphy) && (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(uint8_t epphy)
{
EPDMADIS = 1 << epphy;
}
#endif /* CONFIG_LPC214X_USBDEV_DMA */
/****************************************************************************
* Endpoint operations
****************************************************************************/
/****************************************************************************
* Name: lpc214x_epconfigure
*
* Description:
* Configure endpoint, making it usable
*
* Input Parameters:
* ep - the struct usbdev_ep_s instance obtained from allocep()
* desc - A struct usb_epdesc_s instance describing the endpoint
* last - true if this this last endpoint to be configured. Some hardware
* needs to take special action when all of the endpoints have been
* configured.
*
****************************************************************************/
static int lpc214x_epconfigure(struct usbdev_ep_s *ep,
const struct usb_epdesc_s *desc,
bool last)
{
struct lpc214x_ep_s *privep = (struct lpc214x_ep_s *)ep;
uint32_t inten;
usbtrace(TRACE_EPCONFIGURE, privep->epphy);
DEBUGASSERT(desc->addr == ep->eplog);
/* Realize the endpoint */
lpc214x_eprealize(privep, 1, GETUINT16(desc->mxpacketsize));
/* Enable and reset EP -- twice */
lpc214x_usbcmd(CMD_USB_EP_SETSTATUS | privep->epphy, 0);
lpc214x_usbcmd(CMD_USB_EP_SETSTATUS | privep->epphy, 0);
#ifdef CONFIG_LPC214X_USBDEV_DMA
/* Enable DMA Ep interrupt (WO) */
lpc214x_putreg(1 << privep->epphy, LPC214X_USBDEV_EPDMAEN);
#else
/* Enable Ep interrupt (R/W) */
inten = lpc214x_getreg(LPC214X_USBDEV_EPINTEN);
inten |= (1 << privep->epphy);
lpc214x_putreg(inten, LPC214X_USBDEV_EPINTEN);
#endif
/* If all of the endpoints have been configured, then tell the USB
* controller to enabled normal activity on all realized endpoints.
*/
if (last)
{
lpc214x_usbcmd(CMD_USB_DEV_CONFIG, 1);
}
return OK;
}
/****************************************************************************
* Name: lpc214x_epdisable
*
* Description:
* The endpoint will no longer be used
*
****************************************************************************/
static int lpc214x_epdisable(struct usbdev_ep_s *ep)
{
struct lpc214x_ep_s *privep = (struct lpc214x_ep_s *)ep;
irqstate_t flags;
uint32_t mask = (1 << privep->epphy);
uint32_t reg;
#ifdef CONFIG_DEBUG_FEATURES
if (!ep)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return -EINVAL;
}
#endif
usbtrace(TRACE_EPDISABLE, privep->epphy);
/* Cancel any ongoing activity */
flags = enter_critical_section();
lpc214x_cancelrequests(privep);
/* Disable endpoint and interrupt */
reg = lpc214x_getreg(LPC214X_USBDEV_REEP);
reg &= ~mask;
lpc214x_putreg(reg, LPC214X_USBDEV_REEP);
lpc214x_putreg(mask, LPC214X_USBDEV_EPDMADIS);
reg = lpc214x_getreg(LPC214X_USBDEV_EPINTEN);
reg &= ~mask;
lpc214x_putreg(reg, LPC214X_USBDEV_EPINTEN);
leave_critical_section(flags);
return OK;
}
/****************************************************************************
* Name: lpc214x_epallocreq
*
* Description:
* Allocate an I/O request
*
****************************************************************************/
static struct usbdev_req_s *lpc214x_epallocreq(struct usbdev_ep_s *ep)
{
struct lpc214x_req_s *privreq;
#ifdef CONFIG_DEBUG_FEATURES
if (!ep)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return NULL;
}
#endif
usbtrace(TRACE_EPALLOCREQ, ((struct lpc214x_ep_s *)ep)->epphy);
privreq = (struct lpc214x_req_s *)
kmm_malloc(sizeof(struct lpc214x_req_s));
if (!privreq)
{
usbtrace(TRACE_DEVERROR(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(struct usbdev_ep_s *ep,
struct usbdev_req_s *req)
{
struct lpc214x_req_s *privreq = (struct lpc214x_req_s *)req;
#ifdef CONFIG_DEBUG_FEATURES
if (!ep || !req)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return;
}
#endif
usbtrace(TRACE_EPFREEREQ, ((struct lpc214x_ep_s *)ep)->epphy);
kmm_free(privreq);
}
/****************************************************************************
* Name: lpc214x_epallocbuffer
*
* Description:
* Allocate an I/O buffer
*
****************************************************************************/
#ifdef CONFIG_LPC214X_USBDEV_DMA
static void *lpc214x_epallocbuffer(struct usbdev_ep_s *ep,
uint16_t nbytes)
{
#ifdef CONFIG_USBDEV_DMA
struct lpc214x_ep_s *privep = (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]
#elif defined(CONFIG_USBDEV_DMAMEMORY)
usbtrace(TRACE_EPALLOCBUFFER, privep->epphy);
return usbdev_dma_alloc(bytes);
#else
usbtrace(TRACE_EPALLOCBUFFER, privep->epphy);
return kmm_malloc(bytes);
#endif
}
#endif
/****************************************************************************
* Name: lpc214x_epfreebuffer
*
* Description:
* Free an I/O buffer
*
****************************************************************************/
#ifdef CONFIG_USBDEV_DMA
static void lpc214x_epfreebuffer(struct usbdev_ep_s *ep, void *buf)
{
#ifdef CONFIG_LPC214X_USBDEV_DMA
struct lpc214x_ep_s *privep = (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"
#elif defined(CONFIG_USBDEV_DMAMEMORY)
usbtrace(TRACE_EPFREEBUFFER, privep->epphy);
usbdev_dma_free(buf);
#else
usbtrace(TRACE_EPFREEBUFFER, privep->epphy);
kmm_free(buf);
#endif
}
#endif
/****************************************************************************
* Name: lpc214x_epsubmit
*
* Description:
* Submit an I/O request to the endpoint
*
****************************************************************************/
static int lpc214x_epsubmit(struct usbdev_ep_s *ep,
struct usbdev_req_s *req)
{
struct lpc214x_req_s *privreq = (struct lpc214x_req_s *)req;
struct lpc214x_ep_s *privep = (struct lpc214x_ep_s *)ep;
struct lpc214x_usbdev_s *priv;
irqstate_t flags;
int ret = OK;
#ifdef CONFIG_DEBUG_FEATURES
if (!req || !req->callback || !req->buf || !ep)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
uinfo("req=%p callback=%p buf=%p ep=%p\n",
req, req->callback, req->buf, ep);
return -EINVAL;
}
#endif
usbtrace(TRACE_EPSUBMIT, privep->epphy);
priv = privep->dev;
if (!priv->driver || priv->usbdev.speed == USB_SPEED_UNKNOWN)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_NOTCONFIGURED),
priv->usbdev.speed);
return -ESHUTDOWN;
}
/* Handle the request from the class driver */
req->result = -EINPROGRESS;
req->xfrd = 0;
flags = enter_critical_section();
/* If we are stalled, then drop all requests on the floor */
if (privep->stalled)
{
lpc214x_abortrequest(privep, privreq, -EBUSY);
ret = -EBUSY;
}
/* Handle IN (device-to-host) requests */
else if (LPC214X_EPPHYIN(privep->epphy))
{
/* Add the new request to the request queue for the IN endpoint */
lpc214x_rqenqueue(privep, privreq);
usbtrace(TRACE_INREQQUEUED(privep->epphy), privreq->req.len);
/* If the IN endpoint FIFO is available, then transfer the data now */
if (privep->txbusy == 0)
{
ret = lpc214x_wrrequest(privep);
}
}
/* Handle OUT (host-to-device) requests */
else
{
/* Add the new request to the request queue for the OUT endpoint */
privep->txnullpkt = 0;
lpc214x_rqenqueue(privep, privreq);
usbtrace(TRACE_OUTREQQUEUED(privep->epphy), privreq->req.len);
/* This there a incoming data pending the availability of a request? */
if (priv->rxpending)
{
ret = lpc214x_rdrequest(privep);
priv->rxpending = 0;
}
}
leave_critical_section(flags);
return ret;
}
/****************************************************************************
* Name: lpc214x_epcancel
*
* Description:
* Cancel an I/O request previously sent to an endpoint
*
****************************************************************************/
static int lpc214x_epcancel(struct usbdev_ep_s *ep,
struct usbdev_req_s *req)
{
struct lpc214x_ep_s *privep = (struct lpc214x_ep_s *)ep;
irqstate_t flags;
#ifdef CONFIG_DEBUG_FEATURES
if (!ep || !req)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return -EINVAL;
}
#endif
usbtrace(TRACE_EPCANCEL, privep->epphy);
flags = enter_critical_section();
lpc214x_cancelrequests(privep);
leave_critical_section(flags);
return OK;
}
/****************************************************************************
* Name: lpc214x_epstall
*
* Description:
* Stall or resume and endpoint
*
****************************************************************************/
static int lpc214x_epstall(struct usbdev_ep_s *ep, bool resume)
{
struct lpc214x_ep_s *privep = (struct lpc214x_ep_s *)ep;
irqstate_t flags;
/* STALL or RESUME the endpoint */
flags = enter_critical_section();
usbtrace(resume ? TRACE_EPRESUME : TRACE_EPSTALL, privep->epphy);
lpc214x_usbcmd(CMD_USB_EP_SETSTATUS | privep->epphy,
(resume ? 0 : USBDEV_EPSTALL));
/* If the endpoint of was resumed, then restart any queue write requests */
if (resume)
{
lpc214x_wrrequest(privep);
}
leave_critical_section(flags);
return OK;
}
/****************************************************************************
* Device operations
****************************************************************************/
/****************************************************************************
* Name: lcp214x_allocep
*
* Description:
* Allocate an endpoint matching the parameters.
*
* Input Parameters:
* eplog - 7-bit logical endpoint number (direction bit ignored). Zero
* means that any endpoint matching the other requirements will
* suffice. The assigned endpoint can be found in the eplog
* field.
* 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 struct usbdev_ep_s *lcp214x_allocep(struct usbdev_s *dev,
uint8_t eplog,
bool in, uint8_t eptype)
{
struct lpc214x_usbdev_s *priv = (struct lpc214x_usbdev_s *)dev;
uint32_t epset = LPC214X_EPALLSET & ~LPC214X_EPCTRLSET;
irqstate_t flags;
int epndx = 0;
usbtrace(TRACE_DEVALLOCEP, (uint16_t)eplog);
/* Ignore any direction bits in the logical address */
eplog = USB_EPNO(eplog);
/* A logical address of 0 means that any endpoint will do */
if (eplog > 0)
{
/* Otherwise, we will return the endpoint structure only for the
* requested 'logical' endpoint. All of the other checks will still
* be performed.
*
* First, verify that the logical endpoint is in the range supported by
* by the hardware.
*/
if (eplog >= LPC214X_NLOGENDPOINTS)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_BADEPNO),
(uint16_t)eplog);
return NULL;
}
/* Convert the logical address to a physical OUT endpoint address and
* remove all of the candidate endpoints from the bitset except for the
* the IN/OUT pair for this logical address.
*/
epset &= 3 << (eplog << 1);
}
/* 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_EPISOCSET;
break;
case USB_EP_ATTR_XFER_CONTROL: /* Control endpoint -- not a valid choice */
default:
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_BADEPTYPE), (uint16_t)eptype);
return NULL;
}
/* Is the resulting endpoint supported by the LPC214x? */
if (epset)
{
/* Yes.. now see if any of the request endpoints are available */
flags = enter_critical_section();
epset &= priv->epavail;
if (epset)
{
/* Select the lowest bit in the set of matching,
* available endpoints
*/
for (epndx = 2; epndx < LPC214X_NPHYSENDPOINTS; epndx++)
{
uint32_t bit = 1 << epndx;
if ((epset & bit) != 0)
{
/* Mark the IN/OUT endpoint no longer available */
priv->epavail &= ~(3 << (bit & ~1));
leave_critical_section(flags);
/* And return the pointer to the standard endpoint
* structure
*/
return &priv->eplist[epndx].ep;
}
}
/* Shouldn't get here */
}
leave_critical_section(flags);
}
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_NOEP), (uint16_t)eplog);
return NULL;
}
/****************************************************************************
* Name: lpc214x_freeep
*
* Description:
* Free the previously allocated endpoint
*
****************************************************************************/
static void lpc214x_freeep(struct usbdev_s *dev,
struct usbdev_ep_s *ep)
{
struct lpc214x_usbdev_s *priv = (struct lpc214x_usbdev_s *)dev;
struct lpc214x_ep_s *privep = (struct lpc214x_ep_s *)ep;
irqstate_t flags;
usbtrace(TRACE_DEVFREEEP, (uint16_t)privep->epphy);
if (priv && privep)
{
/* Mark the endpoint as available */
flags = enter_critical_section();
priv->epavail |= (1 << privep->epphy);
leave_critical_section(flags);
}
}
/****************************************************************************
* Name: lpc214x_getframe
*
* Description:
* Returns the current frame number
*
****************************************************************************/
static int lpc214x_getframe(struct usbdev_s *dev)
{
#ifdef CONFIG_LPC214X_USBDEV_FRAME_INTERRUPT
struct lpc214x_usbdev_s *priv = (struct lpc214x_usbdev_s *)dev;
/* Return last valid value of SOF read by the interrupt handler */
usbtrace(TRACE_DEVGETFRAME, (uint16_t)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)
{
uint8_t arg = USBDEV_DEVSTATUS_SUSPEND;
irqstate_t flags;
usbtrace(TRACE_DEVWAKEUP, (uint16_t)g_usbdev.devstatus);
flags = enter_critical_section();
if (DEVSTATUS_CONNECT(g_usbdev.devstatus))
{
arg |= USBDEV_DEVSTATUS_CONNECT;
}
lpc214x_usbcmd(CMD_USB_DEV_SETSTATUS, arg);
leave_critical_section(flags);
return OK;
}
/****************************************************************************
* Name: lpc214x_selfpowered
*
* Description:
* Sets/clears the device selfpowered feature
*
****************************************************************************/
static int lpc214x_selfpowered(struct usbdev_s *dev, bool selfpowered)
{
struct lpc214x_usbdev_s *priv = (struct lpc214x_usbdev_s *)dev;
usbtrace(TRACE_DEVSELFPOWERED, (uint16_t)selfpowered);
#ifdef CONFIG_DEBUG_FEATURES
if (!dev)
{
usbtrace(TRACE_DEVERROR(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, bool enable)
{
usbtrace(TRACE_DEVPULLUP, (uint16_t)enable);
/* 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));
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: arm_usbinitialize
*
* Description:
* Initialize USB hardware.
*
* Assumptions:
* - This function is called very early in the initialization sequence
* - PLL and GIO pin initialization is not performed here but should been
* in the low-level boot logic: PLL1 must be configured for operation
* at 48MHz and P0.23 and PO.31 in PINSEL1 must be configured for Vbus
* and USB connect LED.
*
****************************************************************************/
void arm_usbinitialize(void)
{
struct lpc214x_usbdev_s *priv = &g_usbdev;
uint32_t reg;
int i;
usbtrace(TRACE_DEVINIT, 0);
/* Disable USB interrupts */
lpc214x_putreg(0, LPC214X_USBDEV_INTST);
/* Initialize the device state structure */
memset(priv, 0, sizeof(struct lpc214x_usbdev_s));
priv->usbdev.ops = &g_devops;
priv->usbdev.ep0 = &priv->eplist[LPC214X_EP0_IN].ep;
priv->epavail = LPC214X_EPALLSET;
/* Initialize the endpoint list */
for (i = 0; i < LPC214X_NPHYSENDPOINTS; i++)
{
uint32_t bit = 1 << i;
/* Set endpoint operations, reference to driver structure (not
* really necessary because there is only one controller), and
* the physical endpoint number (which is just the index to the
* endpoint).
*/
priv->eplist[i].ep.ops = &g_epops;
priv->eplist[i].dev = priv;
/* The index, i, is the physical endpoint address; Map this
* to a logical endpoint address usable by the class driver.
*/
priv->eplist[i].epphy = i;
if (LPC214X_EPPHYIN(i))
{
priv->eplist[i].ep.eplog = LPC214X_EPPHYIN2LOG(i);
}
else
{
priv->eplist[i].ep.eplog = LPC214X_EPPHYOUT2LOG(i);
}
/* The maximum packet size may depend on the type of endpoint */
if ((LPC214X_EPCTRLSET & bit) != 0)
{
priv->eplist[i].ep.maxpacket = LPC214X_EP0MAXPACKET;
}
else if ((LPC214X_EPINTRSET & bit) != 0)
{
priv->eplist[i].ep.maxpacket = LPC214X_INTRMAXPACKET;
}
else if ((LPC214X_EPBULKSET & bit) != 0)
{
priv->eplist[i].ep.maxpacket = LPC214X_BULKMAXPACKET;
}
else /* if ((LPC214X_EPISOCSET & bit) != 0) */
{
priv->eplist[i].ep.maxpacket = LPC214X_ISOCMAXPACKET;
}
}
/* Turn on USB power and clocking */
reg = lpc214x_getreg(LPC214X_PCON_PCONP);
reg |= LPC214X_PCONP_PCUSB;
lpc214x_putreg(reg, LPC214X_PCON_PCONP);
/* Attach USB controller interrupt handler */
if (irq_attach(LPC214X_USB_IRQ, lpc214x_usbinterrupt, NULL) != 0)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_IRQREGISTRATION),
(uint16_t)LPC214X_USB_IRQ);
goto errout;
}
/* Enable USB inerrupts at the controller -- but do not disable
* the ARM interrupt until the device is bound to the class
* driver
*/
lpc214x_putreg(USBDEV_INTST_ENUSBINTS, LPC214X_USBDEV_INTST);
/* Disconnect device */
lpc214x_pullup(&priv->usbdev, false);
/* Enable EP0 for OUT (host-to-device) */
lpc214x_usbcmd(CMD_USB_DEV_SETADDRESS, CMD_USB_SETADDRESS_DEVEN | 0);
lpc214x_usbcmd(CMD_USB_DEV_SETADDRESS, CMD_USB_SETADDRESS_DEVEN | 0);
/* Reset/Re-initialize the USB hardware */
lpc214x_usbreset(priv);
/* Init Device state structure */
priv->devstatus = lpc214x_usbcmd(CMD_USB_DEV_GETSTATUS, 0);
return;
errout:
arm_usbuninitialize();
}
/****************************************************************************
* Name: arm_usbuninitialize
****************************************************************************/
void arm_usbuninitialize(void)
{
struct lpc214x_usbdev_s *priv = &g_usbdev;
uint32_t reg;
irqstate_t flags;
usbtrace(TRACE_DEVUNINIT, 0);
if (priv->driver)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_DRIVERREGISTERED), 0);
usbdev_unregister(priv->driver);
}
/* Disconnect device */
flags = enter_critical_section();
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 = lpc214x_getreg(LPC214X_PCON_PCONP);
reg &= ~LPC214X_PCONP_PCUSB;
lpc214x_putreg(reg, LPC214X_PCON_PCONP);
leave_critical_section(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_FEATURES
if (!driver || !driver->ops->bind || !driver->ops->unbind ||
!driver->ops->disconnect || !driver->ops->setup)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return -EINVAL;
}
if (g_usbdev.driver)
{
usbtrace(TRACE_DEVERROR(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_DEVERROR(LPC214X_TRACEERR_BINDFAILED),
(uint16_t) - ret);
g_usbdev.driver = NULL;
}
else
{
/* Enable USB controller interrupts */
up_enable_irq(LPC214X_USB_IRQ);
}
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_FEATURES
if (driver != g_usbdev.driver)
{
usbtrace(TRACE_DEVERROR(LPC214X_TRACEERR_INVALIDPARMS), 0);
return -EINVAL;
}
#endif
/* Unbind the class driver */
CLASS_UNBIND(driver, &g_usbdev.usbdev);
/* Disable USB controller interrupts */
up_disable_irq(LPC214X_USB_IRQ);
/* Unhook the driver */
g_usbdev.driver = NULL;
return OK;
}