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nuttx/drivers/usbhost/usbhost_hub.c

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/****************************************************************************
* drivers/usbhost/usbhost_hub.c
*
* Copyright (C) 2015 Gregory Nutt. All rights reserved.
* Author: Kaushal Parikh <kaushal@dspworks.in>
*
* 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.
*
****************************************************************************/
/* TODO:
* - For EHCI controller, enable use of companion controllers
* or transaction translator with root hub. Current assumption
* is that device connected on EHCI root hub is a high-speed
* device.
*/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <semaphore.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/kmalloc.h>
#include <nuttx/fs/fs.h>
#include <nuttx/arch.h>
#include <nuttx/wqueue.h>
#include <nuttx/scsi.h>
#include <nuttx/usb/usb.h>
#include <nuttx/usb/usbhost.h>
#include <nuttx/usb/hub.h>
#ifdef CONFIG_USBHOST_HUB
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_SCHED_WORKQUEUE
# warning "Worker thread support is required (CONFIG_SCHED_WORKQUEUE)"
#endif
/* Used in usbhost_cfgdesc() */
#define USBHOST_IFFOUND 0x01 /* Required I/F descriptor found */
#define USBHOST_EPINFOUND 0x02 /* Required interrupt IN EP descriptor found */
#define USBHOST_ALLFOUND (USBHOST_IFFOUND|USBHOST_EPINFOUND)
/****************************************************************************
* Private Types
****************************************************************************/
/* This structure contains the internal, private state of the USB host
* hub class.
*/
struct usbhost_hub_s
{
volatile bool disconnected; /* TRUE: Device has been disconnected */
uint8_t ifno; /* Interface number */
int16_t crefs; /* Reference count on the driver instance */
sem_t exclsem; /* Used to maintain mutual exclusive access */
uint8_t nports; /* Number of ports */
uint8_t lpsm; /* Logical power switching mode */
bool compounddev; /* Hub is part of compound device */
uint8_t ocmode; /* Over current protection mode */
bool indicator; /* Port indicator */
uint16_t pwrondelay; /* Power on wait time in ms */
uint8_t ctrlcurrent; /* Control current */
struct usb_hubtt_s tt; /* Transaction translator */
struct usbhost_transfer_s intxfer; /* Interrupt IN endpoint */
struct usbhost_class_s *childclass[USBHUB_MAX_PORTS];
/* Pointer to child devices */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Semaphores */
static void usbhost_takesem(sem_t *sem);
#define usbhost_givesem(s) sem_post(s);
/* Memory allocation services */
static inline uint8_t usbhost_allocaddr(void);
static inline void usbhost_freeaddr(uint8_t addr);
static inline FAR struct usbhost_class_s *
usbhost_allocclass(FAR struct usbhost_driver_s *drvr,
FAR struct usbhost_class_s *hubclass, uint8_t speed,
uint8_t port);
static inline void usbhost_freeclass(FAR struct usbhost_class_s *devclass);
/* Worker thread actions */
static void usbhost_destroy(FAR void *arg);
/* Helpers for usbhost_connect() */
static inline int usbhost_cfgdesc(FAR struct usbhost_class_s *hubclass,
FAR const uint8_t *configdesc, int desclen);
static inline int usbhost_hubdesc(FAR struct usbhost_class_s *hubclass);
static inline int usbhost_hubpwr(FAR struct usbhost_class_s *hubclass,
bool on);
static void usbhost_hubevent(FAR struct usbhost_transfer_s *xfer);
/* (Little Endian) Data helpers */
static inline uint16_t usbhost_getle16(const uint8_t *val);
static void usbhost_putle16(uint8_t *dest, uint16_t val);
static void usbhost_callback(FAR struct usbhost_transfer_s *xfer);
/* struct usbhost_registry_s methods */
static int usbhost_create(FAR struct usbhost_class_s *hubclass,
FAR const struct usbhost_id_s *id);
/* struct usbhost_class_s methods */
static int usbhost_connect(FAR struct usbhost_class_s *hubclass,
FAR const uint8_t *configdesc, int desclen);
static int usbhost_disconnected(FAR struct usbhost_class_s *hubclass);
/****************************************************************************
* Private Data
****************************************************************************/
/* This structure provides the registry entry ID information that will be
* used to associate the USB host hub class to a connected USB hub.
*/
static const const struct usbhost_id_s g_id =
{
USB_CLASS_HUB, /* base */
0, /* subclass */
0, /* proto */
0, /* vid */
0 /* pid */
};
/* This is the USB host hub class's registry entry */
static struct usbhost_registry_s g_hub =
{
NULL, /* flink */
usbhost_create, /* create */
1, /* nids */
&g_id /* id[] */
};
/* Each bit indicates if corresponding bit number
* is allocated as usb address
*/
static uint32_t g_addrmap[4];
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: usbhost_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 usbhost_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: usbhost_allocaddr
*
* Description:
* This is just a wrapper to handle the annoying behavior of semaphore
* waits that return due to the receipt of a signal.
*
****************************************************************************/
static inline uint8_t usbhost_allocaddr(void)
{
uint8_t addr;
for (addr = 0; addr < 128; addr++)
{
if (!(g_addrmap[addr/32] & (0x1 << (addr % 32))))
{
break;
}
}
return (addr + 1);
}
/****************************************************************************
* Name: usbhost_freecaddr
*
* Description:
* This is just a wrapper to handle the annoying behavior of semaphore
* waits that return due to the receipt of a signal.
*
****************************************************************************/
static inline void usbhost_freeaddr(uint8_t addr)
{
addr--;
g_addrmap[addr/32] &= (~(0x1 << (addr % 32)));
}
/****************************************************************************
* Name: usbhost_allocclass
*
* Description:
* This is really part of the logic that implements the create() method
* of struct usbhost_registry_s. This function allocates memory for one
* new class instance.
*
* Input Parameters:
* None
*
* Returned Values:
* On success, this function will return a non-NULL instance of struct
* usbhost_class_s. NULL is returned on failure; this function will
* will fail only if there are insufficient resources to create another
* USB host class instance.
*
****************************************************************************/
static inline FAR struct usbhost_class_s *
usbhost_allocclass(FAR struct usbhost_driver_s *drvr,
FAR struct usbhost_class_s *hubclass,
uint8_t speed, uint8_t port)
{
FAR struct usbhost_hub_s *priv;
FAR struct usbhost_class_s *devclass;
DEBUGASSERT(hubclass != NULL && hubclass->priv != NULL);
priv = (FAR struct usbhost_hub_s *)hubclass->priv;
/* We are not executing from an interrupt handler so we can just call
* kmalloc() to get memory for the class instance.
*/
DEBUGASSERT(!up_interrupt_context());
devclass = (FAR struct usbhost_class_s *)
kmalloc(sizeof(struct usbhost_class_s));
uvdbg("Allocated: %p\n", devclass);
if (devclass != NULL)
{
struct usbhost_epdesc_s epdesc;
int ret;
devclass->addr = usbhost_allocaddr();
devclass->speed = speed;
devclass->drvr = drvr;
devclass->parent = hubclass;
devclass->priv = NULL;
devclass->tt = NULL;
devclass->ttport = 0;
if (!ROOTHUB(devclass))
{
if (hubclass->tt != NULL)
{
devclass->tt = hubclass->tt;
devclass->ttport = hubclass->ttport;
}
else if ((devclass->speed != USB_SPEED_HIGH) &&
(hubclass->speed == USB_SPEED_HIGH))
{
devclass->tt = &priv->tt;
devclass->ttport = port;
}
}
epdesc.devclass = devclass;
epdesc.addr = 0;
epdesc.in = 0;
epdesc.xfrtype = USB_EP_ATTR_XFER_CONTROL;
epdesc.interval = 0;
epdesc.mxpacketsize = 8;
ret = DRVR_EPALLOC(devclass->drvr, &epdesc, &devclass->ep0);
if (ret != OK)
{
udbg("failed to allocate ep0\n");
usbhost_freeclass(devclass);
devclass = NULL;
}
}
return devclass;
}
/****************************************************************************
* Name: usbhost_freeclass
*
* Description:
* Free a class instance previously allocated by usbhost_allocclass().
*
* Input Parameters:
* class - A reference to the class instance to be freed.
*
* Returned Values:
* None
*
****************************************************************************/
static inline void usbhost_freeclass(FAR struct usbhost_class_s *devclass)
{
DEBUGASSERT(devclass != NULL);
if (devclass->ep0 != NULL)
{
DRVR_EPFREE(devclass->drvr, devclass->ep0);
devclass->ep0 = NULL;
}
usbhost_freeaddr(devclass->addr);
/* Free the class instance (calling sched_free() in case we are executing
* from an interrupt handler.
*/
uvdbg("Freeing: %p\n", devclass);
kfree(devclass);
}
/****************************************************************************
* Name: usbhost_destroy
*
* Description:
* The USB mass storage device has been disconnected and the reference
* count on the USB host class instance has gone to 1.. Time to destroy
* the USB host class instance.
*
* Input Parameters:
* arg - A reference to the class instance to be destroyed.
*
* Returned Values:
* None
*
****************************************************************************/
static void usbhost_destroy(FAR void *arg)
{
FAR struct usbhost_class_s *hubclass = (FAR struct usbhost_class_s *)arg;
FAR struct usbhost_hub_s *priv;
int i;
DEBUGASSERT(hubclass != NULL);
priv = (FAR struct usbhost_hub_s *)hubclass->priv;
if (priv != NULL)
{
uvdbg("crefs: %d\n", priv->crefs);
if (priv->intxfer.ep)
{
DRVR_EPFREE(hubclass->drvr, priv->intxfer.ep);
}
/* Destroy the semaphores */
sem_destroy(&priv->exclsem);
/* Destroy allocated child classes */
for (i = 0; i < USBHUB_MAX_PORTS; i++)
{
if (priv->childclass[i] != NULL)
{
CLASS_DISCONNECTED(priv->childclass[i]);
}
}
/* Clear priv class */
kfree(hubclass->priv);
}
usbhost_freeclass(hubclass);
}
/****************************************************************************
* Name: usbhost_cfgdesc
*
* Description:
* This function implements the connect() method of struct
* usbhost_class_s. This method is a callback into the class
* implementation. It is used to provide the device's configuration
* descriptor to the class so that the class may initialize properly
*
* Input Parameters:
* hubclass - The USB host class instance.
* configdesc - A pointer to a uint8_t buffer container the configuration
* descriptor.
* desclen - The length in bytes of the configuration descriptor.
*
* 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 inline int usbhost_cfgdesc(FAR struct usbhost_class_s *hubclass,
FAR const uint8_t *configdesc, int desclen)
{
FAR struct usbhost_hub_s *priv;
FAR struct usb_cfgdesc_s *cfgdesc;
FAR struct usb_desc_s *desc;
FAR struct usbhost_epdesc_s intindesc;
int remaining;
uint8_t found = 0;
int ret;
DEBUGASSERT(hubclass != NULL && hubclass->priv != NULL);
priv = (FAR struct usbhost_hub_s *)hubclass->priv;
DEBUGASSERT(configdesc != NULL &&
desclen >= sizeof(struct usb_cfgdesc_s));
/* Verify that we were passed a configuration descriptor */
cfgdesc = (FAR 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)usbhost_getle16(cfgdesc->totallen);
/* Skip to the next entry descriptor */
configdesc += cfgdesc->len;
remaining -= cfgdesc->len;
/* Loop where there are more dscriptors to examine */
while (remaining >= sizeof(struct usb_desc_s))
{
/* What is the next descriptor? */
desc = (FAR struct usb_desc_s *)configdesc;
switch (desc->type)
{
/* Interface descriptor. We really should get the number of endpoints
* from this descriptor too.
*/
case USB_DESC_TYPE_INTERFACE:
{
FAR struct usb_ifdesc_s *ifdesc =
(FAR struct usb_ifdesc_s *)configdesc;
uvdbg("Interface descriptor\n");
DEBUGASSERT(remaining >= USB_SIZEOF_IFDESC);
/* Save the interface number and mark ONLY the interface found */
priv->ifno = ifdesc->ifno;
found = USBHOST_IFFOUND;
}
break;
/* Endpoint descriptor. Here, we expect two bulk endpoints, an IN
* and an OUT.
*/
case USB_DESC_TYPE_ENDPOINT:
{
FAR struct usb_epdesc_s *epdesc =
(FAR struct usb_epdesc_s *)configdesc;
uvdbg("Endpoint descriptor\n");
DEBUGASSERT(remaining >= USB_SIZEOF_EPDESC);
/* Check for an interrupt endpoint. */
if ((epdesc->attr & USB_EP_ATTR_XFERTYPE_MASK) ==
USB_EP_ATTR_XFER_INT)
{
/* Yes.. it is a interrupt endpoint. IN or OUT? */
if (USB_ISEPOUT(epdesc->addr))
{
/* It is an OUT interrupt endpoint. Ignore */
uvdbg("Bulk OUT EP addr:%d mxpacketsize:%d\n",
(epdesc->addr & USB_EP_ADDR_NUMBER_MASK),
usbhost_getle16(epdesc->mxpacketsize));
}
else
{
/* It is an IN interrupt endpoint. */
found |= USBHOST_EPINFOUND;
/* Save the bulk IN endpoint information */
intindesc.devclass = hubclass;
intindesc.addr = epdesc->addr & USB_EP_ADDR_NUMBER_MASK;
intindesc.in = 1;
intindesc.xfrtype = USB_EP_ATTR_XFER_BULK;
intindesc.interval = epdesc->interval;
intindesc.mxpacketsize = usbhost_getle16(epdesc->mxpacketsize);
uvdbg("Bulk IN EP addr:%d mxpacketsize:%d\n",
intindesc.addr, intindesc.mxpacketsize);
}
}
}
break;
/* Other descriptors are just ignored for now */
default:
break;
}
/* If we found everything we need with this interface, then break out
* of the loop early.
*/
if (found == USBHOST_ALLFOUND)
{
break;
}
/* Increment the address of the next descriptor */
configdesc += desc->len;
remaining -= desc->len;
}
/* Sanity checking... did we find all of things that we need? */
if (found != USBHOST_ALLFOUND)
{
ulldbg("ERROR: Found IF:%s BIN:%s BOUT:%s\n",
(found & USBHOST_IFFOUND) != 0 ? "YES" : "NO",
(found & USBHOST_EPINFOUND) != 0 ? "YES" : "NO");
return -EINVAL;
}
/* We are good... Allocate the endpoints */
ret = DRVR_EPALLOC(hubclass->drvr, &intindesc, &priv->intxfer.ep);
if (ret != OK)
{
udbg("ERROR: Failed to allocate Interrupt IN endpoint\n");
(void)DRVR_EPFREE(hubclass->drvr, priv->intxfer.ep);
return ret;
}
ullvdbg("Endpoints allocated\n");
return OK;
}
/****************************************************************************
* Name: usbhost_hubdesc
*
* Description:
* This function implements the connect() method of struct
* usbhost_class_s. This method is a callback into the class
* implementation. It is used to provide the device's configuration
* descriptor to the class so that the class may initialize properly
*
* Input Parameters:
* hubclass - The USB host class instance.
*
* 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 inline int usbhost_hubdesc(FAR struct usbhost_class_s *hubclass)
{
FAR struct usbhost_hub_s *priv;
struct usb_hubdesc_s hubdesc;
uint16_t hubchar;
int ret;
DEBUGASSERT(hubclass != NULL && hubclass->priv != NULL);
priv = (FAR struct usbhost_hub_s *)hubclass->priv;
ret = usbhost_ctrlxfer(hubclass, (USB_REQ_DIR_IN | USBHUB_REQ_TYPE_HUB),
USB_REQ_GETDESCRIPTOR, USB_DESC_TYPE_HUB,
0, USB_SIZEOF_HUBDESC, (uint8_t *)&hubdesc);
if (ret != OK)
{
udbg("failed to read hub descriptor\n");
return ret;
}
priv->nports = hubdesc.nports;
hubchar = usbhost_getle16(hubdesc.characteristics);
priv->lpsm = (hubchar & USBHUB_CHAR_LPSM_MASK) >> USBHUB_CHAR_LPSM_SHIFT;
priv->compounddev = (hubchar & USBHUB_CHAR_COMPOUND) ? true : false;
priv->ocmode = (hubchar & USBHUB_CHAR_OCPM_MASK) >> USBHUB_CHAR_OCPM_SHIFT;
priv->indicator = (hubchar & USBHUB_CHAR_PORTIND) ? true : false;
priv->pwrondelay = (2 * hubdesc.pwrondelay);
priv->ctrlcurrent = hubdesc.ctrlcurrent;
return OK;
}
/****************************************************************************
* Name: usbhost_hubpwr
*
* Description:
* This function implements the connect() method of struct
* usbhost_class_s. This method is a callback into the class
* implementation. It is used to provide the device's configuration
* descriptor to the class so that the class may initialize properly
*
* Input Parameters:
* hubclass - The USB host class instance.
*
* 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 inline int usbhost_hubpwr(FAR struct usbhost_class_s *hubclass, bool on)
{
FAR struct usbhost_hub_s *priv;
DEBUGASSERT(hubclass != NULL && hubclass->priv != NULL);
priv = (FAR struct usbhost_hub_s *)hubclass->priv;
if (on || ROOTHUB(hubclass))
{
uint16_t req;
int port, ret;
if (on)
{
req = USB_REQ_SETFEATURE;
}
else
{
req = USB_REQ_CLEARFEATURE;
}
for (port = 1; port <= priv->nports; port++)
{
ret = usbhost_ctrlxfer(hubclass, USBHUB_REQ_TYPE_PORT,
req, USBHUB_PORT_FEAT_POWER,
port, 0, NULL);
if (ret != OK)
{
udbg("failed to power %d port %d\n", on, port);
return ret;
}
}
}
return OK;
}
/****************************************************************************
* Name: usbhost_hubevent
*
* Description:
* This function implements the connect() method of struct
* usbhost_class_s. This method is a callback into the class
* implementation. It is used to provide the device's configuration
* descriptor to the class so that the class may initialize properly
*
* Input Parameters:
* xfer - The USB host class instance.
*
* 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 void usbhost_hubevent(FAR struct usbhost_transfer_s *xfer)
{
FAR struct usbhost_class_s *hubclass;
FAR struct usbhost_hub_s *priv;
struct usb_portstatus_s portstatus;
uint16_t status;
uint16_t change;
uint16_t mask;
uint16_t feat;
uint8_t statusmap;
int port;
int ret;
DEBUGASSERT(xfer != NULL && xfer->devclass != NULL);
hubclass = (FAR struct usbhost_class_s *)xfer->devclass;
DEBUGASSERT(hubclass != NULL && hubclass->priv != NULL);
priv = (FAR struct usbhost_hub_s *)hubclass->priv;
statusmap = xfer->buffer[0];
for (port = 1; port <= priv->nports; port++)
{
/* Check if port status has changed */
if (!(statusmap & (0x1 << port)))
{
continue;
}
/* Port status changed, check what happened */
statusmap &= (~(0x1 << port));
/* Read hub port status */
ret = usbhost_ctrlxfer(hubclass,
(USB_REQ_DIR_IN | USBHUB_REQ_TYPE_PORT),
USB_REQ_GETSTATUS, 0, port,
USB_SIZEOF_PORTSTS, (uint8_t *)&portstatus);
if (ret != OK)
{
udbg("failed to read port %d status\n", port);
continue;
}
status = usbhost_getle16(portstatus.status);
change = usbhost_getle16(portstatus.change);
/* First, clear all change bits */
mask = 0x1;
feat = USBHUB_PORT_FEAT_CCONNECTION;
while (change)
{
if (change & mask)
{
ret = usbhost_ctrlxfer(hubclass, USBHUB_REQ_TYPE_PORT,
USB_REQ_CLEARFEATURE, feat,
port, 0, NULL);
if (ret != OK)
{
udbg("failed to clear port %d change mask %x\n", port, mask);
}
change &= (~mask);
}
mask <<= 1;
feat++;
}
change = usbhost_getle16(portstatus.change);
/* Handle connect or disconnect, no power management */
if (change & USBHUB_PORT_STAT_CCONNECTION)
{
uint16_t debouncetime = 0;
uint16_t debouncestable = 0;
uint16_t connection = 0xffff;
udbg("port %d status %x change %x\n", port, status, change);
/* Debounce */
while (debouncetime < 1500)
{
ret = usbhost_ctrlxfer(hubclass,
(USB_REQ_DIR_IN | USBHUB_REQ_TYPE_PORT),
USB_REQ_GETSTATUS, 0, port,
USB_SIZEOF_PORTSTS, (uint8_t *)&portstatus);
if (ret != OK)
{
break;
}
status = usbhost_getle16(portstatus.status);
change = usbhost_getle16(portstatus.change);
if (!(change & USBHUB_PORT_STAT_CCONNECTION) &&
((status & USBHUB_PORT_STAT_CONNECTION) == connection))
{
debouncestable += 25;
if (debouncestable >= 100)
{
break;
}
}
else
{
debouncestable = 0;
connection = status & USBHUB_PORT_STAT_CONNECTION;
}
if (change & USBHUB_PORT_STAT_CCONNECTION)
{
(void)usbhost_ctrlxfer(hubclass, USBHUB_REQ_TYPE_PORT,
USB_REQ_CLEARFEATURE, USBHUB_PORT_FEAT_CCONNECTION,
port, 0, NULL);
}
debouncetime += 25;
up_mdelay(25);
}
if ((ret != OK) || (debouncetime >= 1500))
{
udbg("failed to debounce port %d\n", port);
continue;
}
if (status & USBHUB_PORT_STAT_CONNECTION)
{
/* Connect */
ret = usbhost_ctrlxfer(hubclass, USBHUB_REQ_TYPE_PORT,
USB_REQ_SETFEATURE,
USBHUB_PORT_FEAT_RESET, port, 0, NULL);
if (ret != OK)
{
udbg("failed to reset port %d\n", port);
continue;
}
up_mdelay(100);
ret = usbhost_ctrlxfer(hubclass,
(USB_REQ_DIR_IN | USBHUB_REQ_TYPE_PORT),
USB_REQ_GETSTATUS, 0, port,
USB_SIZEOF_PORTSTS, (uint8_t *)&portstatus);
if (ret != OK)
{
udbg("failed to reset port %d\n", port);
continue;
}
status = usbhost_getle16(portstatus.status);
change = usbhost_getle16(portstatus.change);
udbg("port %d status %x change %x after reset\n",
port, status, change);
if (!(status & USBHUB_PORT_STAT_RESET) &&
(status & USBHUB_PORT_STAT_ENABLE))
{
uint8_t speed;
if (change & USBHUB_PORT_STAT_CRESET)
{
(void)usbhost_ctrlxfer(hubclass, USBHUB_REQ_TYPE_PORT,
USB_REQ_CLEARFEATURE,
USBHUB_PORT_FEAT_CRESET,
port, 0, NULL);
}
if (status & USBHUB_PORT_STAT_HIGH_SPEED)
{
speed = USB_SPEED_HIGH;
}
else if (status & USBHUB_PORT_STAT_LOW_SPEED)
{
speed = USB_SPEED_LOW;
}
else
{
speed = USB_SPEED_FULL;
}
/* Allocate new class and enumerate */
priv->childclass[port] =
usbhost_allocclass(hubclass->drvr, hubclass, speed, port);
if (priv->childclass[port] != NULL)
{
udbg("enumerate port %d speed %d\n", port, speed);
#if 0
ret = usbhost_enumerate(priv->childclass[port]);
if (ret != OK)
{
udbg("failed to enumerate port %d\n", port);
}
#endif
}
}
else
{
udbg("failed to enable port %d\n", port);
continue;
}
}
else
{
/* Disconnect */
}
}
else if (change)
{
udbg("status %x change %x not handled\n", status, change);
}
}
if (statusmap & 0x1)
{
/* Hub status changed */
udbg("Hub status changed, not handled\n");
}
xfer->status = -EIO;
ret = usbhost_intxfer(hubclass, xfer, usbhost_callback);
if (ret != OK)
{
udbg("failed to queue interrupt endpoint\n");
}
}
/****************************************************************************
* Name: usbhost_getle16
*
* Description:
* Get a (possibly unaligned) 16-bit little endian value.
*
* Input Parameters:
* val - A pointer to the first byte of the little endian value.
*
* Returned Values:
* A uint16_t representing the whole 16-bit integer value
*
****************************************************************************/
static inline uint16_t usbhost_getle16(const uint8_t *val)
{
return (uint16_t)val[1] << 8 | (uint16_t)val[0];
}
/****************************************************************************
* Name: usbhost_putle16
*
* Description:
* Put a (possibly unaligned) 16-bit little endian value.
*
* Input Parameters:
* dest - A pointer to the first byte to save the little endian value.
* val - The 16-bit value to be saved.
*
* Returned Values:
* None
*
****************************************************************************/
static void usbhost_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: usbhost_callback
*
* Description:
* Put a (possibly unaligned) 16-bit little endian value.
*
* Input Parameters:
* dest - A pointer to the first byte to save the little endian value.
* val - The 16-bit value to be saved.
*
* Returned Values:
* None
*
****************************************************************************/
static void usbhost_callback(FAR struct usbhost_transfer_s *xfer)
{
if (xfer->status != OK)
{
xfer->buffer[0] = 0;
}
(void)work_queue(HPWORK, &xfer->work, (worker_t)usbhost_hubevent, xfer, 0);
}
/****************************************************************************
* struct usbhost_registry_s methods
****************************************************************************/
/****************************************************************************
* Name: usbhost_create
*
* Description:
* This function implements the create() method of struct usbhost_registry_s.
* The create() method is a callback into the class implementation. It is
* used to (1) create a new instance of the USB host class state and to (2)
* bind a USB host driver "session" to the class instance. Use of this
* create() method will support environments where there may be multiple
* USB ports and multiple USB devices simultaneously connected.
*
* Input Parameters:
* drvr - An instance of struct usbhost_driver_s that the class
* implementation will "bind" to its state structure and will
* subsequently use to communicate with the USB host driver.
* id - In the case where the device supports multiple base classes,
* subclasses, or protocols, this specifies which to configure for.
*
* Returned Values:
* On success, this function will return a non-NULL instance of struct
* usbhost_class_s that can be used by the USB host driver to communicate
* with the USB host class. NULL is returned on failure; this function
* will fail only if the drvr input parameter is NULL or if there are
* insufficient resources to create another USB host class instance.
*
****************************************************************************/
static int usbhost_create(FAR struct usbhost_class_s *hubclass,
FAR const struct usbhost_id_s *id)
{
struct usbhost_hub_s *priv;
int child;
int ret = -ENOMEM;
/* Allocate a USB host class instance */
priv = kmalloc(sizeof(struct usbhost_hub_s));
if (priv != NULL)
{
/* Initialize the allocated storage class instance */
memset(priv, 0, sizeof(struct usbhost_hub_s));
/* Initialize class method function pointers */
hubclass->connect = usbhost_connect;
hubclass->disconnected = usbhost_disconnected;
hubclass->priv = priv;
/* The initial reference count is 1... One reference is held by the driver */
priv->crefs = 1;
/* Initialize semaphores (this works okay in the interrupt context) */
sem_init(&priv->exclsem, 0, 1);
/* Initialize interrupt end-point */
priv->intxfer.ep = NULL;
/* Initialize transaction translator */
priv->tt.class = NULL;
/* Initialize child class pointers */
for (child = 0; child < USBHUB_MAX_PORTS; child++)
{
priv->childclass[child] = NULL;
}
ret = OK;
}
return ret;
}
/****************************************************************************
* struct usbhost_class_s methods
****************************************************************************/
/****************************************************************************
* Name: usbhost_connect
*
* Description:
* This function implements the connect() method of struct
* usbhost_class_s. This method is a callback into the class
* implementation. It is used to provide the device's configuration
* descriptor to the class so that the class may initialize properly
*
* Input Parameters:
* class - The USB host class entry previously obtained from a call to
* create().
* configdesc - A pointer to a uint8_t buffer container the configuration
* descriptor.
* desclen - The length in bytes of the configuration descriptor.
* funcaddr - The USB address of the function containing the endpoint that
* EP0 controls
*
* Returned Values:
* On success, zero (OK) is returned. On a failure, a negated errno value is
* returned indicating the nature of the failure
*
* NOTE that the class instance remains valid upon return with a failure. It is
* the responsibility of the higher level enumeration logic to call
* CLASS_DISCONNECTED to free up the class driver resources.
*
* Assumptions:
* - This function will *not* be called from an interrupt handler.
* - If this function returns an error, the USB host controller driver
* must call to DISCONNECTED method to recover from the error
*
****************************************************************************/
static int usbhost_connect(FAR struct usbhost_class_s *hubclass,
FAR const uint8_t *configdesc, int desclen)
{
FAR struct usbhost_hub_s *priv;
int ret;
DEBUGASSERT(hubclass != NULL && hubclass->priv != NULL);
priv = (FAR struct usbhost_hub_s *)hubclass->priv;
DEBUGASSERT(configdesc != NULL &&
desclen >= sizeof(struct usb_cfgdesc_s));
/* Parse the configuration descriptor to get the endpoints */
ret = usbhost_cfgdesc(hubclass, configdesc, desclen);
if (ret != OK)
{
udbg("failed to parse config descriptor\n");
}
else
{
/* Allocate buffer for status change (INT) endpoint */
ret = DRVR_IOALLOC(hubclass->drvr, &priv->intxfer.buffer, 1);
if (ret != OK)
{
return ret;
}
/* Now read hub descriptor */
ret = usbhost_hubdesc(hubclass);
if (ret != OK)
{
return ret;
}
/* Power on hub (i.e. power on all hub ports) */
ret = usbhost_hubpwr(hubclass, true);
if (ret != OK)
{
return ret;
}
/* INT request to periodically check port status */
ret = usbhost_intxfer(hubclass, &priv->intxfer,
usbhost_callback);
}
return ret;
}
/****************************************************************************
* Name: usbhost_disconnected
*
* Description:
* This function implements the disconnected() method of struct
* usbhost_class_s. This method is a callback into the class
* implementation. It is used to inform the class that the USB device has
* been disconnected.
*
* Input Parameters:
* class - The USB host class entry previously obtained from a call to
* create().
*
* 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 cannot be called from an interrupt handler.
*
****************************************************************************/
static int usbhost_disconnected(struct usbhost_class_s *hubclass)
{
FAR struct usbhost_hub_s *priv;
irqstate_t flags;
DEBUGASSERT(hubclass != NULL && hubclass->priv != NULL);
priv = (FAR struct usbhost_hub_s *)hubclass->priv;
/* Set an indication to any users of the device that the device is no
* longer available.
*/
flags = irqsave();
priv->disconnected = true;
/* Now check the number of references on the class instance. If it is one,
* then we can free the class instance now. Otherwise, we will have to
* wait until the holders of the references free them by closing the
* block driver.
*/
ullvdbg("crefs: %d\n", priv->crefs);
if (priv->crefs == 1)
{
/* Free buffer for status change (INT) endpoint */
DRVR_IOFREE(hubclass->drvr, priv->intxfer.buffer);
/* Power off (for root hub only) */
(void)usbhost_hubpwr(hubclass, false);
/* Destroy the class instance */
usbhost_destroy(hubclass);
}
irqrestore(flags);
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: usbhost_hubinit
*
* Description:
* Initialize the USB hub class. This function should be called
* be platform-specific code in order to initialize and register support
* for the USB host storage class.
*
* Input Parameters:
* None
*
* Returned Values:
* On success this function will return zero (OK); A negated errno value
* will be returned on failure.
*
****************************************************************************/
int usbhost_hubinit(void)
{
/* Advertise our availability to support (certain) mass storage devices */
return usbhost_registerclass(&g_hub);
}
/*******************************************************************************
* Name: usbhost_rh_connect
*
* Description:
* Connects USB host root hub
*
* Input Parameters:
* drvr - The USB host driver instance obtained as a parameter from the call
* to the class create() method.
*
* Returned Value:
*
* Assumptions:
*
*******************************************************************************/
int usbhost_rh_connect(FAR struct usbhost_driver_s *drvr)
{
struct usbhost_class_s *hubclass = NULL;
int ret = -ENOMEM;
memset(g_addrmap, 0, 4*4);
hubclass = usbhost_allocclass(drvr, NULL, drvr->speed, 1);
if (hubclass != NULL)
{
ret = usbhost_enumerate(hubclass);
if (ret != OK)
{
udbg("failed to enumerate root hub\n");
}
else
{
drvr->roothub = hubclass;
udbg("Total class memory %d+%d\n", sizeof(struct usbhost_class_s),
sizeof(struct usbhost_hub_s));
}
}
return ret;
}
/*******************************************************************************
* Name: usbhost_rh_disconnect
*
* Description:
* Disconnects USB host root hub
*
* Input Parameters:
* drvr - The USB host driver instance obtained as a parameter from the call
* to the class create() method.
*
* Returned Value:
*
* Assumptions:
*
*******************************************************************************/
int usbhost_rh_disconnect(FAR struct usbhost_driver_s *drvr)
{
FAR struct usbhost_class_s *hubclass = drvr->roothub;
if (hubclass != NULL)
{
CLASS_DISCONNECTED(hubclass);
drvr->roothub = NULL;
}
return OK;
}
#endif /* CONFIG_USBHOST_HUB */
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