/*******************************************************************************
* arch/arm/src/lpc17xx/lpc17_usbhost.c
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Authors: Rafael Noronha <rafael@pdsolucoes.com.br>
* 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 <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <semaphore.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/usb/usb.h>
#include <nuttx/usb/ohci.h>
#include <nuttx/usb/usbhost.h>
#include <nuttx/usb/usbhost_trace.h>
#include <arch/irq.h>
#include <arch/board/board.h>
#include "chip.h"
#include "up_arch.h"
#include "up_internal.h"
#include "lpc17_internal.h"
#include "lpc17_usb.h"
#include "lpc17_syscon.h"
#include "lpc17_ohciram.h"
/*******************************************************************************
* Definitions
*******************************************************************************/
/* Frame Interval */
#define FI (12000-1) /* 12000 bits per frame (-1) */
#define DEFAULT_FMINTERVAL ((((6 * (FI - 210)) / 7) << 16) | FI)
/* CLKCTRL enable bits */
#define LPC17_CLKCTRL_ENABLES (USBOTG_CLK_HOSTCLK|USBOTG_CLK_DEVCLK|\
USBOTG_CLK_I2CCLK|USBOTG_CLK_OTGCLK|\
USBOTG_CLK_AHBCLK)
/* Dump GPIO registers */
#if defined(CONFIG_LPC17_USBHOST_REGDEBUG) && defined(CONFIG_DEBUG_GPIO)
# define usbhost_dumpgpio() \
do { \
lpc17_dumpgpio(GPIO_USB_DP, "D+ P0.29; D- P0.30"); \
lpc17_dumpgpio(GPIO_USB_UPLED, "LED P1:18; PPWR P1:19 PWRD P1:22 PVRCR P1:27"); \
} while (0);
#else
# define usbhost_dumpgpio()
#endif
/* USB Host Memory *************************************************************/
/* Helper definitions */
#define HCCA ((volatile struct lpc17_hcca_s *)LPC17_HCCA_BASE)
#define TDHEAD ((volatile struct lpc17_hctd_s *)LPC17_TDHEAD_ADDR)
#define TDTAIL ((volatile struct lpc17_hctd_s *)LPC17_TDTAIL_ADDR)
#define EDCTRL ((volatile struct lpc17_hced_s *)LPC17_EDCTRL_ADDR)
#define EDFREE ((struct lpc17_hced_s *)LPC17_EDFREE_BASE)
#define TDBuffer ((volatile uint8_t *)(LPC17_TDBUFFER_BASE)
/* Descriptors *****************************************************************/
/* TD delay interrupt value */
#define TD_DELAY(n) (uint32_t)((n) << GTD_STATUS_DI_SHIFT)
/* Debug ***********************************************************************/
/* Trace error codes */
#warning "To be provided"
/* Trace interrupt codes */
#warning "To be provided"
/*******************************************************************************
* Private Types
*******************************************************************************/
/* This structure retains the state of the USB host controller */
struct lpc17_usbhost_s
{
/* Common device fields. This must be the first thing defined in the
* structure so that it is possible to simply cast from struct usbhost_s
* to structlpc17_usbhost_s.
*/
struct usbhost_driver_s drvr;
/* The bound device class driver */
struct usbhost_class_s *class;
/* Driver status */
uint8_t tdstatus; /* TD control status bits from last Writeback Done Head event */
sem_t wdhsem; /* Semaphore used to wait for Writeback Done Head event */
};
/* Host Controller Communication Area */
struct lpc17_hcca_s
{
volatile uint32_t inttbl[32]; /* Interrupt table */
volatile uint32_t frameno; /* Frame number */
volatile uint32_t donehead; /* Done head */
volatile uint8_t reserved[116]; /* Reserved for future use */
volatile uint8_t unused[4]; /* Unused */
};
/* HostController Transfer Descriptor */
struct lpc17_hctd_s
{
volatile uint32_t ctrl; /* Transfer descriptor control */
volatile uint32_t currptr; /* Physical address of current buffer pointer */
volatile uint32_t next; /* Physical pointer to next Transfer Descriptor */
volatile uint32_t bufend; /* Physical address of end of buffer */
};
/* HostController EndPoint Descriptor */
struct lpc17_hced_s
{
volatile uint32_t ctrl; /* Endpoint descriptor control */
volatile uint32_t tailtd; /* Physical address of tail in Transfer descriptor list */
volatile uint32_t headtd; /* Physical address of head in Transfer descriptor list */
volatile uint32_t next; /* Physical address of next Endpoint descriptor */
};
/* The following is used manage a list of free EDs */
struct lpc17_edlist_s
{
struct lpc17_edlist_s *flink; /* Link to next ED in the list */
uint32_t pad[3]; /* To make the same size as struct lpc17_hced_s */
};
/*******************************************************************************
* Private Function Prototypes
*******************************************************************************/
/* Register operations ********************************************************/
#ifdef CONFIG_LPC17_USBHOST_REGDEBUG
static void lpc17_printreg(uint32_t addr, uint32_t val, bool iswrite);
static void lpc17_checkreg(uint32_t addr, uint32_t val, bool iswrite);
static uint32_t lpc17_getreg(uint32_t addr);
static void lpc17_putreg(uint32_t val, uint32_t addr);
#else
# define lpc17_getreg(addr) getreg32(addr)
# define lpc17_putreg(val,addr) putreg32(val,addr)
#endif
/* Semaphores ******************************************************************/
static void lpc17_takesem(sem_t *sem);
#define lpc17_givesem(s) sem_post(s);
/* Byte stream access helper functions *****************************************/
static inline uint16_t lpc17_getle16(const uint8_t *val);
static void lpc17_putle16(uint8_t *dest, uint16_t val);
/* Descriptor helper functions *************************************************/
static struct lpc17_hced_s *lpc17_edalloc(struct lpc17_usbhost_s *priv);
static void lpc17_edfree(struct lpc17_usbhost_s *priv, struct lpc17_hced_s *ed);
static void lpc17_enqueuetd(volatile struct lpc17_hced_s *ed, uint32_t dirpid,
uint32_t toggle, volatile uint8_t *buffer,
size_t buflen);
/* Class helper functions ******************************************************/
static int inline lpc17_configdesc(struct lpc17_usbhost_s *priv,
const uint8_t *configdesc, int desclen,
struct usbhost_id_s *id);
static int lpc17_classbind(struct lpc17_usbhost_s *priv,
const uint8_t *configdesc, int desclen);
/* Interrupt handling **********************************************************/
static int lpc17_usbinterrupt(int irq, FAR void *context);
/* USB host controller operations **********************************************/
static int lpc17_enumerate(FAR struct usbhost_driver_s *drvr);
static int lpc17_alloc(FAR struct usbhost_driver_s *drvr,
FAR uint8_t **buffer, FAR size_t *maxlen);
static int lpc17_free(FAR struct usbhost_driver_s *drvr, FAR uint8_t *buffer);
static int lpc17_ctrlin(FAR struct usbhost_driver_s *drvr,
FAR const struct usb_ctrlreq_s *req,
FAR uint8_t *buffer);
static int lpc17_ctrlout(FAR struct usbhost_driver_s *drvr,
FAR const struct usb_ctrlreq_s *req,
FAR const uint8_t *buffer);
static int lpc17_transfer(FAR struct usbhost_driver_s *drvr,
FAR struct usbhost_epdesc_s *ed,
FAR uint8_t *buffer, size_t buflen);
static void lpc17_disconnect(FAR struct usbhost_driver_s *drvr);
/* Initializaion ***************************************************************/
static void lpc17_tdinit(volatile struct lpc17_hctd_s *td);
static void lpc17_edinit(volatile struct lpc17_hced_s *ed);
static void lpc17_hccainit(volatile struct lpc17_hcca_s *hcca);
/*******************************************************************************
* Private Data
*******************************************************************************/
/* In this driver implementation, support is provided for only a single a single
* USB device. All status information can be simply retained in a single global
* instance.
*/
static struct lpc17_usbhost_s g_usbhost =
{
.drvr =
{
.enumerate = lpc17_enumerate,
.alloc = lpc17_alloc,
.free = lpc17_free,
.ctrlin = lpc17_ctrlin,
.ctrlout = lpc17_ctrlout,
.transfer = lpc17_transfer,
.disconnect = lpc17_disconnect,
},
.class = NULL,
};
/* This is a free list of EDs */
static struct lpc17_edlist_s *g_edfree;
/*******************************************************************************
* Public Data
*******************************************************************************/
/*******************************************************************************
* Private Functions
*******************************************************************************/
/*******************************************************************************
* Name: lpc17_printreg
*
* Description:
* Print the contents of an LPC17xx register operation
*
*******************************************************************************/
#ifdef CONFIG_LPC17_USBHOST_REGDEBUG
static void lpc17_printreg(uint32_t addr, uint32_t val, bool iswrite)
{
lldbg("%08x%s%08x\n", addr, iswrite ? "<-" : "->", val);
}
#endif
/*******************************************************************************
* Name: lpc17_checkreg
*
* Description:
* Get the contents of an LPC17xx register
*
*******************************************************************************/
#ifdef CONFIG_LPC17_USBHOST_REGDEBUG
static void lpc17_checkreg(uint32_t addr, uint32_t val, bool iswrite)
{
static uint32_t prevaddr = 0;
static uint32_t preval = 0;
static uint32_t count = 0;
static bool prevwrite = false;
/* Is this the same value that we read from/wrote to the same register last time?
* Are we polling the register? If so, suppress the output.
*/
if (addr == prevaddr && val == preval && prevwrite == iswrite)
{
/* Yes.. Just increment the count */
count++;
}
else
{
/* No this is a new address or value or operation. Were there any
* duplicate accesses before this one?
*/
if (count > 0)
{
/* Yes.. Just one? */
if (count == 1)
{
/* Yes.. Just one */
lpc17_printreg(prevaddr, preval, prevwrite);
}
else
{
/* No.. More than one. */
lldbg("[repeats %d more times]\n", count);
}
}
/* Save the new address, value, count, and operation for next time */
prevaddr = addr;
preval = val;
count = 0;
prevwrite = iswrite;
/* Show the new regisgter access */
lpc17_printreg(addr, val, iswrite);
}
}
#endif
/*******************************************************************************
* Name: lpc17_getreg
*
* Description:
* Get the contents of an LPC17xx register
*
*******************************************************************************/
#ifdef CONFIG_LPC17_USBHOST_REGDEBUG
static uint32_t lpc17_getreg(uint32_t addr)
{
/* Read the value from the register */
uint32_t val = getreg32(addr);
/* Check if we need to print this value */
lpc17_checkreg(addr, val, false);
return val;
}
#endif
/*******************************************************************************
* Name: lpc17_putreg
*
* Description:
* Set the contents of an LPC17xx register to a value
*
*******************************************************************************/
#ifdef CONFIG_LPC17_USBHOST_REGDEBUG
static void lpc17_putreg(uint32_t val, uint32_t addr)
{
/* Check if we need to print this value */
lpc17_checkreg(addr, val, true);
/* Write the value */
putreg32(val, addr);
}
#endif
/****************************************************************************
* Name: lpc17_takesem
*
* Description:
* This is just a wrapper to handle the annoying behavior of semaphore
* waits that return due to the receipt of a signal.
*
****************************************************************************/
static void lpc17_takesem(sem_t *sem)
{
/* Take the semaphore (perhaps waiting) */
while (sem_wait(sem) != 0)
{
/* The only case that an error should occr here is if the wait was
* awakened by a signal.
*/
ASSERT(errno == EINTR);
}
}
/****************************************************************************
* Name: lpc17_getle16
*
* Description:
* Get a (possibly unaligned) 16-bit little endian value.
*
****************************************************************************/
static inline uint16_t lpc17_getle16(const uint8_t *val)
{
return (uint16_t)val[1] << 8 | (uint16_t)val[0];
}
/****************************************************************************
* Name: lpc17_putle16
*
* Description:
* Put a (possibly unaligned) 16-bit little endian value.
*
****************************************************************************/
static void lpc17_putle16(uint8_t *dest, uint16_t val)
{
dest[0] = val & 0xff; /* Little endian means LS byte first in byte stream */
dest[1] = val >> 8;
}
/*******************************************************************************
* Name: lpc17_edalloc
*
* Description:
* Allocate an ED from the free list
*
*******************************************************************************/
static struct lpc17_hced_s *lpc17_edalloc(struct lpc17_usbhost_s *priv)
{
struct lpc17_hced_s *ret = (struct lpc17_hced_s *)g_edfree;
if (ret)
{
g_edfree = ((struct lpc17_edlist_s*)ret)->flink;
}
return ret;
}
/*******************************************************************************
* Name: lpc17_edfree
*
* Description:
* Return an ED to the free list
*
*******************************************************************************/
static void lpc17_edfree(struct lpc17_usbhost_s *priv, struct lpc17_hced_s *ed)
{
struct lpc17_edlist_s *edfree = (struct lpc17_edlist_s *)ed;
edfree->flink = g_edfree;
g_edfree = edfree;
}
/*******************************************************************************
* Name: lpc17_enqueuetd
*
* Description:
* Enqueue a transfer descriptor
*
*******************************************************************************/
static void lpc17_enqueuetd(volatile struct lpc17_hced_s *ed, uint32_t dirpid,
uint32_t toggle, volatile uint8_t *buffer, size_t buflen)
{
TDHEAD->ctrl = (GTD_STATUS_R | dirpid | TD_DELAY(0) | toggle | GTD_STATUS_CC_MASK);
TDTAIL->ctrl = 0;
TDHEAD->currptr = (uint32_t)buffer;
TDTAIL->currptr = 0;
TDHEAD->next = (uint32_t)TDTAIL;
TDTAIL->next = 0;
TDHEAD->bufend = (uint32_t)(buffer + (buflen - 1));
TDTAIL->bufend = 0;
ed->headtd = (uint32_t)TDHEAD | ((ed->headtd) & 0x00000002);
ed->tailtd = (uint32_t)TDTAIL;
ed->next = 0;
}
/****************************************************************************
* Name: lpc17_classbind
*
* Description:
* A configuration descriptor has been obtained from the device. Find the
* ID information for the class that supports this device.
*
****************************************************************************/
static inline int
lpc17_configdesc(struct lpc17_usbhost_s *priv, const uint8_t *configdesc,
int desclen, struct usbhost_id_s *id)
{
struct usb_cfgdesc_s *cfgdesc;
struct usb_ifdesc_s *ifdesc;
int remaining;
DEBUGASSERT(priv != NULL &&
configdesc != NULL &&
desclen >= sizeof(struct usb_cfgdesc_s));
/* Verify that we were passed a configuration descriptor */
cfgdesc = (struct usb_cfgdesc_s *)configdesc;
if (cfgdesc->type != USB_DESC_TYPE_CONFIG)
{
return -EINVAL;
}
/* Get the total length of the configuration descriptor (little endian).
* It might be a good check to get the number of interfaces here too.
*/
remaining = (int)lpc17_getle16(cfgdesc->totallen);
/* Skip to the next entry descriptor */
configdesc += cfgdesc->len;
remaining -= cfgdesc->len;
/* Loop where there are more dscriptors to examine */
memset(&id, 0, sizeof(FAR struct usb_desc_s));
while (remaining >= sizeof(struct usb_desc_s))
{
/* What is the next descriptor? Is it an interface descriptor? */
ifdesc = (struct usb_ifdesc_s *)configdesc;
if (ifdesc->type == USB_DESC_TYPE_INTERFACE)
{
/* Yes, extract the class information from the interface descriptor.
* (We are going to need to do more than this here in the future:
* ID information might lie elsewhere and we will need the VID and
* PID as well).
*/
DEBUGASSERT(remaining >= sizeof(struct usb_ifdesc_s));
id->base = ifdesc->class;
id->subclass = ifdesc->subclass;
id->proto = ifdesc->protocol;
return OK;
}
/* Increment the address of the next descriptor */
configdesc += ifdesc->len;
remaining -= ifdesc->len;
}
return -ENOENT;
}
/****************************************************************************
* Name: lpc17_classbind
*
* Description:
* A configuration descriptor has been obtained from the device. Try to
* bind this configuration descriptor with a supported class.
*
****************************************************************************/
static int lpc17_classbind(struct lpc17_usbhost_s *priv,
const uint8_t *configdesc, int desclen)
{
struct usbhost_id_s id;
int ret;
DEBUGASSERT(priv && priv->class == NULL);
/* Get the class identification information for this device. */
ret = lpc17_configdesc(priv, configdesc, desclen, &id);
uvdbg("lpc17_configdesc: %d\n", ret);
if (ret)
{
/* So if there is a class implementation registered to support this
* device.
*/
ret = -EINVAL;
const struct usbhost_registry_s *reg = usbhost_findclass(&id);
uvdbg("usbhost_findclass: %p\n", reg);
if (reg)
{
/* Yes.. there is a class for this device. Get an instance of
* its interface.
*/
ret = -ENOMEM;
priv->class = CLASS_CREATE(reg, &priv->drvr, &id);
uvdbg("CLASS_CREATE: %p\n", priv->class);
if (priv->class)
{
/* Then initialize the newly instantiated class instance */
ret = CLASS_CONFIGDESC(priv->class, configdesc, desclen);
if (ret != OK)
{
udbg("CLASS_CONFIGDESC failed: %d\n", ret);
CLASS_DISCONNECTED(priv->class);
priv->class = NULL;
}
}
}
}
uvdbg("Returning: %d\n", ret);
return ret;
}
/*******************************************************************************
* Name: lpc17_usbinterrupt
*
* Description:
* USB interrupt handler
*
*******************************************************************************/
static int lpc17_usbinterrupt(int irq, FAR void *context)
{
struct lpc17_usbhost_s *priv = &g_usbhost;
/* Read the device interrupt status register */
usbtrace(TRACE_INTENTRY(LPC17_TRACEINTID_USB), 0xbeef);
#warning "Not implemented"
usbtrace(TRACE_INTEXIT(LPC17_TRACEINTID_USB), 0);
return OK;
}
/*******************************************************************************
* USB Host Controller Operations
*******************************************************************************/
/************************************************************************************
* Name: lpc17_enumerate
*
* Description:
* Enumerate the connected device. This function will enqueue the
* enumeration process. As part of this enumeration process, the driver
* will (1) get the device's configuration descriptor, (2) extract the class
* ID info from the configuration descriptor, (3) call usbhost_findclass()
* to find the class that supports this device, (4) call the create()
* method on the struct usbhost_registry_s interface to get a class
* instance, and finally (5) call the configdesc() method of the struct
* usbhost_class_s interface. After that, the class is in charge of the
* sequence of operations.
*
* Input Parameters:
* drvr - The USB host driver instance obtained as a parameter from the call to
* the class create() method.
*
* Returned Values:
* On success, zero (OK) is returned. On a failure, a negated errno value is
* returned indicating the nature of the failure
*
* Assumptions:
* This function will *not* be called from an interrupt handler.
*
************************************************************************************/
static int lpc17_enumerate(FAR struct usbhost_driver_s *drvr)
{
# warning "Not Implemented"
return -ENOSYS;
}
/************************************************************************************
* Name: lpc17_alloc
*
* Description:
* Some hardware supports special memory in which transfer descriptors can
* be accessed more efficiently. This method provides a mechanism to allocate
* the transfer descriptor memory. If the underlying hardware does not support
* such "special" memory, this functions may simply map to malloc.
*
* Input Parameters:
* drvr - The USB host driver instance obtained as a parameter from the call to
* the class create() method.
* buffer - The address of a memory location provided by the caller in which to
* return the allocated buffer memory address.
* maxlen - The address of a memory location provided by the caller in which to
* return the maximum size of the allocated buffer memory.
*
* Returned Values:
* On success, zero (OK) is returned. On a failure, a negated errno value is
* returned indicating the nature of the failure
*
* Assumptions:
* This function will *not* be called from an interrupt handler.
*
************************************************************************************/
static int lpc17_alloc(FAR struct usbhost_driver_s *drvr,
FAR uint8_t **buffer, FAR size_t *maxlen)
{
# warning "Not Implemented"
return -ENOSYS;
}
/************************************************************************************
* Name: lpc17_free
*
* Description:
* Some hardware supports special memory in which transfer descriptors can
* be accessed more efficiently. This method provides a mechanism to free that
* transfer descriptor memory. If the underlying hardware does not support
* such "special" memory, this functions may simply map to free().
*
* Input Parameters:
* drvr - The USB host driver instance obtained as a parameter from the call to
* the class create() method.
* buffer - The address of the allocated buffer memory to be freed.
*
* Returned Values:
* On success, zero (OK) is returned. On a failure, a negated errno value is
* returned indicating the nature of the failure
*
* Assumptions:
* This function will *not* be called from an interrupt handler.
*
************************************************************************************/
static int lpc17_free(FAR struct usbhost_driver_s *drvr, FAR uint8_t *buffer)
{
# warning "Not Implemented"
return -ENOSYS;
}
/************************************************************************************
* Name: lpc17_ctrlin and lpc17_ctrlout
*
* Description:
* Process a IN or OUT request on the control endpoint. These methods
* will enqueue the request and return immediately. Only one transfer may be
* queued; Neither these methods nor the transfer() method can be called again
* until the control transfer functions returns.
*
* These are blocking methods; these functions will not return until the
* control transfer has completed.
*
* Input Parameters:
* drvr - The USB host driver instance obtained as a parameter from the call to
* the class create() method.
* req - Describes the request to be sent. This data will be copied from the
* user provided memory. Therefore, the req buffer may be declared on the
* stack.
* buffer - A buffer used for sending the request and for returning any
* responses. This buffer must be large enough to hold the length value
* in the request description. buffer must have been allocated using DRVR_ALLOC
*
* Returned Values:
* On success, zero (OK) is returned. On a failure, a negated errno value is
* returned indicating the nature of the failure
*
* Assumptions:
* This function will *not* be called from an interrupt handler.
*
************************************************************************************/
static int lpc17_ctrlin(FAR struct usbhost_driver_s *drvr,
FAR const struct usb_ctrlreq_s *req,
FAR uint8_t *buffer)
{
# warning "Not Implemented"
return -ENOSYS;
}
static int lpc17_ctrlout(FAR struct usbhost_driver_s *drvr,
FAR const struct usb_ctrlreq_s *req,
FAR const uint8_t *buffer)
{
# warning "Not Implemented"
return -ENOSYS;
}
/************************************************************************************
* Name: lpc17_transfer
*
* Description:
* Process a request to handle a transfer descriptor. This method will
* enqueue the transfer request and return immediately. Only one transfer may be
* queued; Neither this method nor the ctrlin or ctrlout methods can be called
* again until this function returns.
*
* This is a blocking method; this functions will not return until the
* transfer has completed.
*
* Input Parameters:
* drvr - The USB host driver instance obtained as a parameter from the call to
* the class create() method.
* ed - The IN or OUT endpoint descriptor for the device endpoint on which to
* perform the transfer.
* buffer - A buffer containing the data to be sent (OUT endpoint) or received
* (IN endpoint). buffer must have been allocated using DRVR_ALLOC
* buflen - The length of the data to be sent or received.
*
* Returned Values:
* On success, zero (OK) is returned. On a failure, a negated errno value is
* returned indicating the nature of the failure
*
* Assumptions:
* This function will *not* be called from an interrupt handler.
*
************************************************************************************/
static int lpc17_transfer(FAR struct usbhost_driver_s *drvr,
FAR struct usbhost_epdesc_s *ed,
FAR uint8_t *buffer, size_t buflen)
{
# warning "Not Implemented"
return -ENOSYS;
}
/************************************************************************************
* Name: lpc17_disconnect
*
* Description:
* Called by the class when an error occurs and driver has been disconnected.
* The USB host driver should discard the handle to the class instance (it is
* stale) and not attempt any further interaction with the class driver instance
* (until a new instance is received from the create() method). The driver
* should not called the class' disconnected() method.
*
* Input Parameters:
* drvr - The USB host driver instance obtained as a parameter from the call to
* the class create() method.
*
* Returned Values:
* None
*
* Assumptions:
* This function will *not* be called from an interrupt handler.
*
************************************************************************************/
static void lpc17_disconnect(FAR struct usbhost_driver_s *drvr)
{
# warning "Not Implemented"
}
/*******************************************************************************
* Initialization
*******************************************************************************/
static void lpc17_tdinit(volatile struct lpc17_hctd_s *td)
{
td->ctrl = 0;
td->currptr = 0;
td->next = 0;
td->bufend = 0;
}
static void lpc17_edinit(volatile struct lpc17_hced_s *ed)
{
ed->ctrl = 0;
ed->tailtd = 0;
ed->headtd = 0;
ed->next = 0;
}
static void lpc17_hccainit(volatile struct lpc17_hcca_s *hcca)
{
int i;
for (i = 0; i < 32; i++)
{
hcca->inttbl[i] = 0;
}
hcca->frameno = 0;
hcca->donehead = 0;
}
/*******************************************************************************
* Public Functions
*******************************************************************************/
/*******************************************************************************
* Name: up_usbhostinitialize
*
* Description:
* Initialize USB host device controller hardware.
*
* Assumptions:
* This function is called very early in the initialization sequence in order
* to initialize the USB device functionality.
*
*******************************************************************************/
void up_usbhostinitialize(void)
{
struct lpc17_usbhost_s *priv = &g_usbhost;
uint32_t regval;
irqstate_t flags;
int i;
usbtrace(TRACE_DEVINIT, 0);
/* Initialize the state data structure */
sem_init(&priv->wdhsem, 0, 0);
/* Enable power by setting PCUSB in the PCONP register */
flags = irqsave();
regval = lpc17_getreg(LPC17_SYSCON_PCONP);
regval |= SYSCON_PCONP_PCUSB;
lpc17_putreg(regval, LPC17_SYSCON_PCONP);
/* Enable clocking on USB (USB PLL clocking was initialized in very low-
* evel clock setup logic (see lpc17_clockconfig.c)). We do still need
* to set up USBOTG CLKCTRL to enable clocking.
*/
lpc17_putreg(LPC17_CLKCTRL_ENABLES, LPC17_USBOTG_CLKCTRL);
/* Then wait for the clocks to be reported as "ON" */
do
{
regval = lpc17_getreg(LPC17_USBOTG_CLKST);
}
while ((regval & LPC17_CLKCTRL_ENABLES) != LPC17_CLKCTRL_ENABLES);
lpc17_putreg(3, LPC17_USBOTG_STCTRL);
/* Step 3: Configure I/O pins */
usbhost_dumpgpio();
lpc17_configgpio(GPIO_USB_DP); /* Positive differential data */
lpc17_configgpio(GPIO_USB_DM); /* Negative differential data */
lpc17_configgpio(GPIO_USB_UPLED); /* GoodLink LED control signal */
lpc17_configgpio(GPIO_USB_PPWR); /* Port Power enable signal for USB port */
lpc17_configgpio(GPIO_USB_PWRD); /* Power Status for USB port (host power switch) */
lpc17_configgpio(GPIO_USB_OVRCR); /* USB port Over-Current status */
usbhost_dumpgpio();
udbg("Initializing Host Stack\n");
/* Initialize all the TDs, EDs and HCCA to 0 */
lpc17_hccainit(HCCA);
lpc17_tdinit(TDHEAD);
lpc17_tdinit(TDTAIL);
lpc17_edinit(EDCTRL);
/* Initialize user-configurable EDs */
for (i = 0; i < CONFIG_USBHOST_NEDS; i++)
{
/* Put the ED in a free list */
lpc17_edfree(priv, &EDFREE[i]);
}
/* Wait 50MS then perform hardware reset */
up_mdelay(50);
lpc17_putreg(0, LPC17_USBHOST_CTRL); /* Hardware reset */
lpc17_putreg(0, LPC17_USBHOST_CTRLHEADED); /* Initialize control list head to Zero */
lpc17_putreg(0, LPC17_USBHOST_BULKHEADED); /* Initialize bulk list head to Zero */
/* Software reset */
lpc17_putreg(OHCI_CMDST_HCR, LPC17_USBHOST_CMDST);
/* Write Fm interval and largest data packet counter */
lpc17_putreg(DEFAULT_FMINTERVAL, LPC17_USBHOST_FMINT);
/* Put HC in operational state */
regval = lpc17_getreg(LPC17_USBHOST_CTRL);
regval &= ~OHCI_CTRL_HCFS_MASK;
regval |= OHCI_CTRL_HCFS_OPER;
lpc17_putreg(regval, LPC17_USBHOST_CTRL);
/* Set global power */
lpc17_putreg(OHCI_RHSTATUS_LPS, LPC17_USBHOST_RHSTATUS);
/* Set HCCA base address */
lpc17_putreg((uint32_t)HCCA, LPC17_USBHOST_HCCA);
/* Clear pending interrupts */
regval = lpc17_getreg(LPC17_USBHOST_INTST);
lpc17_putreg(regval, LPC17_USBHOST_INTST);
/* Enable OHCI interrupts */
lpc17_putreg((OHCI_INT_MIE | OHCI_INT_WDH | OHCI_INT_RHSC), LPC17_USBHOST_INTEN);
/* Attach USB host controller interrupt handler */
if (irq_attach(LPC17_IRQ_USB, lpc17_usbinterrupt) != 0)
{
usbtrace(TRACE_DEVERROR(LPC17_TRACEERR_IRQREGISTRATION),
(uint16_t)LPC17_IRQ_USB);
return;
}
/* Enable USB interrupts at the SYCON controller */
flags = irqsave();
regval = lpc17_getreg(LPC17_SYSCON_USBINTST);
regval |= SYSCON_USBINTST_ENINTS;
lpc17_putreg(regval, LPC17_SYSCON_USBINTST);
irqrestore(flags);
/* Enable interrupts at the interrupt controller */
up_enable_irq(LPC17_IRQ_USB); /* enable USB interrupt */
udbg("USB host Initialized\n");
}
