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freebsd-dev/sys/dev/usb/template/usb_template.c
Andrew Thompson ed6d949afd - Make struct usb_xfer opaque so that drivers can not access the internals 
- Reduce the number of headers needed for a usb driver, the common case is just   usb.h and usbdi.h
2009-06-23 02:19:59 +00:00

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/* $FreeBSD$ */
/*-
* Copyright (c) 2007 Hans Petter Selasky. All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
/*
* This file contains sub-routines to build up USB descriptors from
* USB templates.
*/
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/linker_set.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include "usbdevs.h"
#include <dev/usb/usb_cdc.h>
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_dynamic.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_device.h>
#define USB_DEBUG_VAR usb_debug
#include <dev/usb/usb_debug.h>
#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_bus.h>
#include <dev/usb/template/usb_template.h>
MODULE_DEPEND(usb_template, usb, 1, 1, 1);
MODULE_VERSION(usb_template, 1);
/* function prototypes */
static void usb_make_raw_desc(struct usb_temp_setup *, const uint8_t *);
static void usb_make_endpoint_desc(struct usb_temp_setup *,
const struct usb_temp_endpoint_desc *);
static void usb_make_interface_desc(struct usb_temp_setup *,
const struct usb_temp_interface_desc *);
static void usb_make_config_desc(struct usb_temp_setup *,
const struct usb_temp_config_desc *);
static void usb_make_device_desc(struct usb_temp_setup *,
const struct usb_temp_device_desc *);
static uint8_t usb_hw_ep_match(const struct usb_hw_ep_profile *, uint8_t,
uint8_t);
static uint8_t usb_hw_ep_find_match(struct usb_hw_ep_scratch *,
struct usb_hw_ep_scratch_sub *, uint8_t);
static uint8_t usb_hw_ep_get_needs(struct usb_hw_ep_scratch *, uint8_t,
uint8_t);
static usb_error_t usb_hw_ep_resolve(struct usb_device *,
struct usb_descriptor *);
static const struct usb_temp_device_desc *usb_temp_get_tdd(struct usb_device *);
static void *usb_temp_get_device_desc(struct usb_device *);
static void *usb_temp_get_qualifier_desc(struct usb_device *);
static void *usb_temp_get_config_desc(struct usb_device *, uint16_t *,
uint8_t);
static const void *usb_temp_get_string_desc(struct usb_device *, uint16_t,
uint8_t);
static const void *usb_temp_get_vendor_desc(struct usb_device *,
const struct usb_device_request *);
static const void *usb_temp_get_hub_desc(struct usb_device *);
static usb_error_t usb_temp_get_desc(struct usb_device *,
struct usb_device_request *, const void **, uint16_t *);
static usb_error_t usb_temp_setup(struct usb_device *,
const struct usb_temp_device_desc *);
static void usb_temp_unsetup(struct usb_device *);
static usb_error_t usb_temp_setup_by_index(struct usb_device *,
uint16_t index);
static void usb_temp_init(void *);
/*------------------------------------------------------------------------*
* usb_make_raw_desc
*
* This function will insert a raw USB descriptor into the generated
* USB configuration.
*------------------------------------------------------------------------*/
static void
usb_make_raw_desc(struct usb_temp_setup *temp,
const uint8_t *raw)
{
void *dst;
uint8_t len;
/*
* The first byte of any USB descriptor gives the length.
*/
if (raw) {
len = raw[0];
if (temp->buf) {
dst = USB_ADD_BYTES(temp->buf, temp->size);
bcopy(raw, dst, len);
/* check if we have got a CDC union descriptor */
if ((raw[0] >= sizeof(struct usb_cdc_union_descriptor)) &&
(raw[1] == UDESC_CS_INTERFACE) &&
(raw[2] == UDESCSUB_CDC_UNION)) {
struct usb_cdc_union_descriptor *ud = (void *)dst;
/* update the interface numbers */
ud->bMasterInterface +=
temp->bInterfaceNumber;
ud->bSlaveInterface[0] +=
temp->bInterfaceNumber;
}
}
temp->size += len;
}
}
/*------------------------------------------------------------------------*
* usb_make_endpoint_desc
*
* This function will generate an USB endpoint descriptor from the
* given USB template endpoint descriptor, which will be inserted into
* the USB configuration.
*------------------------------------------------------------------------*/
static void
usb_make_endpoint_desc(struct usb_temp_setup *temp,
const struct usb_temp_endpoint_desc *ted)
{
struct usb_endpoint_descriptor *ed;
const void **rd;
uint16_t old_size;
uint16_t mps;
uint8_t ea = 0; /* Endpoint Address */
uint8_t et = 0; /* Endpiont Type */
/* Reserve memory */
old_size = temp->size;
temp->size += sizeof(*ed);
/* Scan all Raw Descriptors first */
rd = ted->ppRawDesc;
if (rd) {
while (*rd) {
usb_make_raw_desc(temp, *rd);
rd++;
}
}
if (ted->pPacketSize == NULL) {
/* not initialized */
temp->err = USB_ERR_INVAL;
return;
}
mps = ted->pPacketSize->mps[temp->usb_speed];
if (mps == 0) {
/* not initialized */
temp->err = USB_ERR_INVAL;
return;
} else if (mps == UE_ZERO_MPS) {
/* escape for Zero Max Packet Size */
mps = 0;
}
ea = (ted->bEndpointAddress & (UE_ADDR | UE_DIR_IN | UE_DIR_OUT));
et = (ted->bmAttributes & UE_XFERTYPE);
/*
* Fill out the real USB endpoint descriptor
* in case there is a buffer present:
*/
if (temp->buf) {
ed = USB_ADD_BYTES(temp->buf, old_size);
ed->bLength = sizeof(*ed);
ed->bDescriptorType = UDESC_ENDPOINT;
ed->bEndpointAddress = ea;
ed->bmAttributes = ted->bmAttributes;
USETW(ed->wMaxPacketSize, mps);
/* setup bInterval parameter */
if (ted->pIntervals &&
ted->pIntervals->bInterval[temp->usb_speed]) {
ed->bInterval =
ted->pIntervals->bInterval[temp->usb_speed];
} else {
switch (et) {
case UE_BULK:
case UE_CONTROL:
ed->bInterval = 0; /* not used */
break;
case UE_INTERRUPT:
switch (temp->usb_speed) {
case USB_SPEED_LOW:
case USB_SPEED_FULL:
ed->bInterval = 1; /* 1 ms */
break;
default:
ed->bInterval = 8; /* 8*125 us */
break;
}
break;
default: /* UE_ISOCHRONOUS */
switch (temp->usb_speed) {
case USB_SPEED_LOW:
case USB_SPEED_FULL:
ed->bInterval = 1; /* 1 ms */
break;
default:
ed->bInterval = 1; /* 125 us */
break;
}
break;
}
}
}
temp->bNumEndpoints++;
}
/*------------------------------------------------------------------------*
* usb_make_interface_desc
*
* This function will generate an USB interface descriptor from the
* given USB template interface descriptor, which will be inserted
* into the USB configuration.
*------------------------------------------------------------------------*/
static void
usb_make_interface_desc(struct usb_temp_setup *temp,
const struct usb_temp_interface_desc *tid)
{
struct usb_interface_descriptor *id;
const struct usb_temp_endpoint_desc **ted;
const void **rd;
uint16_t old_size;
/* Reserve memory */
old_size = temp->size;
temp->size += sizeof(*id);
/* Update interface and alternate interface numbers */
if (tid->isAltInterface == 0) {
temp->bAlternateSetting = 0;
temp->bInterfaceNumber++;
} else {
temp->bAlternateSetting++;
}
/* Scan all Raw Descriptors first */
rd = tid->ppRawDesc;
if (rd) {
while (*rd) {
usb_make_raw_desc(temp, *rd);
rd++;
}
}
/* Reset some counters */
temp->bNumEndpoints = 0;
/* Scan all Endpoint Descriptors second */
ted = tid->ppEndpoints;
if (ted) {
while (*ted) {
usb_make_endpoint_desc(temp, *ted);
ted++;
}
}
/*
* Fill out the real USB interface descriptor
* in case there is a buffer present:
*/
if (temp->buf) {
id = USB_ADD_BYTES(temp->buf, old_size);
id->bLength = sizeof(*id);
id->bDescriptorType = UDESC_INTERFACE;
id->bInterfaceNumber = temp->bInterfaceNumber;
id->bAlternateSetting = temp->bAlternateSetting;
id->bNumEndpoints = temp->bNumEndpoints;
id->bInterfaceClass = tid->bInterfaceClass;
id->bInterfaceSubClass = tid->bInterfaceSubClass;
id->bInterfaceProtocol = tid->bInterfaceProtocol;
id->iInterface = tid->iInterface;
}
}
/*------------------------------------------------------------------------*
* usb_make_config_desc
*
* This function will generate an USB config descriptor from the given
* USB template config descriptor, which will be inserted into the USB
* configuration.
*------------------------------------------------------------------------*/
static void
usb_make_config_desc(struct usb_temp_setup *temp,
const struct usb_temp_config_desc *tcd)
{
struct usb_config_descriptor *cd;
const struct usb_temp_interface_desc **tid;
uint16_t old_size;
/* Reserve memory */
old_size = temp->size;
temp->size += sizeof(*cd);
/* Reset some counters */
temp->bInterfaceNumber = 0 - 1;
temp->bAlternateSetting = 0;
/* Scan all the USB interfaces */
tid = tcd->ppIfaceDesc;
if (tid) {
while (*tid) {
usb_make_interface_desc(temp, *tid);
tid++;
}
}
/*
* Fill out the real USB config descriptor
* in case there is a buffer present:
*/
if (temp->buf) {
cd = USB_ADD_BYTES(temp->buf, old_size);
/* compute total size */
old_size = temp->size - old_size;
cd->bLength = sizeof(*cd);
cd->bDescriptorType = UDESC_CONFIG;
USETW(cd->wTotalLength, old_size);
cd->bNumInterface = temp->bInterfaceNumber + 1;
cd->bConfigurationValue = temp->bConfigurationValue;
cd->iConfiguration = tcd->iConfiguration;
cd->bmAttributes = tcd->bmAttributes;
cd->bMaxPower = tcd->bMaxPower;
cd->bmAttributes |= (UC_REMOTE_WAKEUP | UC_BUS_POWERED);
if (temp->self_powered) {
cd->bmAttributes |= UC_SELF_POWERED;
} else {
cd->bmAttributes &= ~UC_SELF_POWERED;
}
}
}
/*------------------------------------------------------------------------*
* usb_make_device_desc
*
* This function will generate an USB device descriptor from the
* given USB template device descriptor.
*------------------------------------------------------------------------*/
static void
usb_make_device_desc(struct usb_temp_setup *temp,
const struct usb_temp_device_desc *tdd)
{
struct usb_temp_data *utd;
const struct usb_temp_config_desc **tcd;
uint16_t old_size;
/* Reserve memory */
old_size = temp->size;
temp->size += sizeof(*utd);
/* Scan all the USB configs */
temp->bConfigurationValue = 1;
tcd = tdd->ppConfigDesc;
if (tcd) {
while (*tcd) {
usb_make_config_desc(temp, *tcd);
temp->bConfigurationValue++;
tcd++;
}
}
/*
* Fill out the real USB device descriptor
* in case there is a buffer present:
*/
if (temp->buf) {
utd = USB_ADD_BYTES(temp->buf, old_size);
/* Store a pointer to our template device descriptor */
utd->tdd = tdd;
/* Fill out USB device descriptor */
utd->udd.bLength = sizeof(utd->udd);
utd->udd.bDescriptorType = UDESC_DEVICE;
utd->udd.bDeviceClass = tdd->bDeviceClass;
utd->udd.bDeviceSubClass = tdd->bDeviceSubClass;
utd->udd.bDeviceProtocol = tdd->bDeviceProtocol;
USETW(utd->udd.idVendor, tdd->idVendor);
USETW(utd->udd.idProduct, tdd->idProduct);
USETW(utd->udd.bcdDevice, tdd->bcdDevice);
utd->udd.iManufacturer = tdd->iManufacturer;
utd->udd.iProduct = tdd->iProduct;
utd->udd.iSerialNumber = tdd->iSerialNumber;
utd->udd.bNumConfigurations = temp->bConfigurationValue - 1;
/*
* Fill out the USB device qualifier. Pretend that we
* don't support any other speeds by setting
* "bNumConfigurations" equal to zero. That saves us
* generating an extra set of configuration
* descriptors.
*/
utd->udq.bLength = sizeof(utd->udq);
utd->udq.bDescriptorType = UDESC_DEVICE_QUALIFIER;
utd->udq.bDeviceClass = tdd->bDeviceClass;
utd->udq.bDeviceSubClass = tdd->bDeviceSubClass;
utd->udq.bDeviceProtocol = tdd->bDeviceProtocol;
utd->udq.bNumConfigurations = 0;
USETW(utd->udq.bcdUSB, 0x0200);
utd->udq.bMaxPacketSize0 = 0;
switch (temp->usb_speed) {
case USB_SPEED_LOW:
USETW(utd->udd.bcdUSB, 0x0110);
utd->udd.bMaxPacketSize = 8;
break;
case USB_SPEED_FULL:
USETW(utd->udd.bcdUSB, 0x0110);
utd->udd.bMaxPacketSize = 32;
break;
case USB_SPEED_HIGH:
USETW(utd->udd.bcdUSB, 0x0200);
utd->udd.bMaxPacketSize = 64;
break;
case USB_SPEED_VARIABLE:
USETW(utd->udd.bcdUSB, 0x0250);
utd->udd.bMaxPacketSize = 255; /* 512 bytes */
break;
default:
temp->err = USB_ERR_INVAL;
break;
}
}
}
/*------------------------------------------------------------------------*
* usb_hw_ep_match
*
* Return values:
* 0: The endpoint profile does not match the criterias
* Else: The endpoint profile matches the criterias
*------------------------------------------------------------------------*/
static uint8_t
usb_hw_ep_match(const struct usb_hw_ep_profile *pf,
uint8_t ep_type, uint8_t ep_dir_in)
{
if (ep_type == UE_CONTROL) {
/* special */
return (pf->support_control);
}
if ((pf->support_in && ep_dir_in) ||
(pf->support_out && !ep_dir_in)) {
if ((pf->support_interrupt && (ep_type == UE_INTERRUPT)) ||
(pf->support_isochronous && (ep_type == UE_ISOCHRONOUS)) ||
(pf->support_bulk && (ep_type == UE_BULK))) {
return (1);
}
}
return (0);
}
/*------------------------------------------------------------------------*
* usb_hw_ep_find_match
*
* This function is used to find the best matching endpoint profile
* for and endpoint belonging to an USB descriptor.
*
* Return values:
* 0: Success. Got a match.
* Else: Failure. No match.
*------------------------------------------------------------------------*/
static uint8_t
usb_hw_ep_find_match(struct usb_hw_ep_scratch *ues,
struct usb_hw_ep_scratch_sub *ep, uint8_t is_simplex)
{
const struct usb_hw_ep_profile *pf;
uint16_t distance;
uint16_t temp;
uint16_t max_frame_size;
uint8_t n;
uint8_t best_n;
uint8_t dir_in;
uint8_t dir_out;
distance = 0xFFFF;
best_n = 0;
if ((!ep->needs_in) && (!ep->needs_out)) {
return (0); /* we are done */
}
if (ep->needs_ep_type == UE_CONTROL) {
dir_in = 1;
dir_out = 1;
} else {
if (ep->needs_in) {
dir_in = 1;
dir_out = 0;
} else {
dir_in = 0;
dir_out = 1;
}
}
for (n = 1; n != (USB_EP_MAX / 2); n++) {
/* get HW endpoint profile */
(ues->methods->get_hw_ep_profile) (ues->udev, &pf, n);
if (pf == NULL) {
/* end of profiles */
break;
}
/* check if IN-endpoint is reserved */
if (dir_in || pf->is_simplex) {
if (ues->bmInAlloc[n / 8] & (1 << (n % 8))) {
/* mismatch */
continue;
}
}
/* check if OUT-endpoint is reserved */
if (dir_out || pf->is_simplex) {
if (ues->bmOutAlloc[n / 8] & (1 << (n % 8))) {
/* mismatch */
continue;
}
}
/* check simplex */
if (pf->is_simplex == is_simplex) {
/* mismatch */
continue;
}
/* check if HW endpoint matches */
if (!usb_hw_ep_match(pf, ep->needs_ep_type, dir_in)) {
/* mismatch */
continue;
}
/* get maximum frame size */
if (dir_in)
max_frame_size = pf->max_in_frame_size;
else
max_frame_size = pf->max_out_frame_size;
/* check if we have a matching profile */
if (max_frame_size >= ep->max_frame_size) {
temp = (max_frame_size - ep->max_frame_size);
if (distance > temp) {
distance = temp;
best_n = n;
ep->pf = pf;
}
}
}
/* see if we got a match */
if (best_n != 0) {
/* get the correct profile */
pf = ep->pf;
/* reserve IN-endpoint */
if (dir_in) {
ues->bmInAlloc[best_n / 8] |=
(1 << (best_n % 8));
ep->hw_endpoint_in = best_n | UE_DIR_IN;
ep->needs_in = 0;
}
/* reserve OUT-endpoint */
if (dir_out) {
ues->bmOutAlloc[best_n / 8] |=
(1 << (best_n % 8));
ep->hw_endpoint_out = best_n | UE_DIR_OUT;
ep->needs_out = 0;
}
return (0); /* got a match */
}
return (1); /* failure */
}
/*------------------------------------------------------------------------*
* usb_hw_ep_get_needs
*
* This function will figure out the type and number of endpoints
* which are needed for an USB configuration.
*
* Return values:
* 0: Success.
* Else: Failure.
*------------------------------------------------------------------------*/
static uint8_t
usb_hw_ep_get_needs(struct usb_hw_ep_scratch *ues,
uint8_t ep_type, uint8_t is_complete)
{
const struct usb_hw_ep_profile *pf;
struct usb_hw_ep_scratch_sub *ep_iface;
struct usb_hw_ep_scratch_sub *ep_curr;
struct usb_hw_ep_scratch_sub *ep_max;
struct usb_hw_ep_scratch_sub *ep_end;
struct usb_descriptor *desc;
struct usb_interface_descriptor *id;
struct usb_endpoint_descriptor *ed;
enum usb_dev_speed speed;
uint16_t wMaxPacketSize;
uint16_t temp;
uint8_t ep_no;
ep_iface = ues->ep_max;
ep_curr = ues->ep_max;
ep_end = ues->ep + USB_EP_MAX;
ep_max = ues->ep_max;
desc = NULL;
speed = usbd_get_speed(ues->udev);
repeat:
while ((desc = usb_desc_foreach(ues->cd, desc))) {
if ((desc->bDescriptorType == UDESC_INTERFACE) &&
(desc->bLength >= sizeof(*id))) {
id = (void *)desc;
if (id->bAlternateSetting == 0) {
/* going forward */
ep_iface = ep_max;
} else {
/* reset */
ep_curr = ep_iface;
}
}
if ((desc->bDescriptorType == UDESC_ENDPOINT) &&
(desc->bLength >= sizeof(*ed))) {
ed = (void *)desc;
goto handle_endpoint_desc;
}
}
ues->ep_max = ep_max;
return (0);
handle_endpoint_desc:
temp = (ed->bmAttributes & UE_XFERTYPE);
if (temp == ep_type) {
if (ep_curr == ep_end) {
/* too many endpoints */
return (1); /* failure */
}
wMaxPacketSize = UGETW(ed->wMaxPacketSize);
if ((wMaxPacketSize & 0xF800) &&
(speed == USB_SPEED_HIGH)) {
/* handle packet multiplier */
temp = (wMaxPacketSize >> 11) & 3;
wMaxPacketSize &= 0x7FF;
if (temp == 1) {
wMaxPacketSize *= 2;
} else {
wMaxPacketSize *= 3;
}
}
/*
* Check if we have a fixed endpoint number, else the
* endpoint number is allocated dynamically:
*/
ep_no = (ed->bEndpointAddress & UE_ADDR);
if (ep_no != 0) {
/* get HW endpoint profile */
(ues->methods->get_hw_ep_profile)
(ues->udev, &pf, ep_no);
if (pf == NULL) {
/* HW profile does not exist - failure */
DPRINTFN(0, "Endpoint profile %u "
"does not exist\n", ep_no);
return (1);
}
/* reserve fixed endpoint number */
if (ep_type == UE_CONTROL) {
ues->bmInAlloc[ep_no / 8] |=
(1 << (ep_no % 8));
ues->bmOutAlloc[ep_no / 8] |=
(1 << (ep_no % 8));
if ((pf->max_in_frame_size < wMaxPacketSize) ||
(pf->max_out_frame_size < wMaxPacketSize)) {
DPRINTFN(0, "Endpoint profile %u "
"has too small buffer!\n", ep_no);
return (1);
}
} else if (ed->bEndpointAddress & UE_DIR_IN) {
ues->bmInAlloc[ep_no / 8] |=
(1 << (ep_no % 8));
if (pf->max_in_frame_size < wMaxPacketSize) {
DPRINTFN(0, "Endpoint profile %u "
"has too small buffer!\n", ep_no);
return (1);
}
} else {
ues->bmOutAlloc[ep_no / 8] |=
(1 << (ep_no % 8));
if (pf->max_out_frame_size < wMaxPacketSize) {
DPRINTFN(0, "Endpoint profile %u "
"has too small buffer!\n", ep_no);
return (1);
}
}
} else if (is_complete) {
/* check if we have enough buffer space */
if (wMaxPacketSize >
ep_curr->max_frame_size) {
return (1); /* failure */
}
if (ed->bEndpointAddress & UE_DIR_IN) {
ed->bEndpointAddress =
ep_curr->hw_endpoint_in;
} else {
ed->bEndpointAddress =
ep_curr->hw_endpoint_out;
}
} else {
/* compute the maximum frame size */
if (ep_curr->max_frame_size < wMaxPacketSize) {
ep_curr->max_frame_size = wMaxPacketSize;
}
if (temp == UE_CONTROL) {
ep_curr->needs_in = 1;
ep_curr->needs_out = 1;
} else {
if (ed->bEndpointAddress & UE_DIR_IN) {
ep_curr->needs_in = 1;
} else {
ep_curr->needs_out = 1;
}
}
ep_curr->needs_ep_type = ep_type;
}
ep_curr++;
if (ep_max < ep_curr) {
ep_max = ep_curr;
}
}
goto repeat;
}
/*------------------------------------------------------------------------*
* usb_hw_ep_resolve
*
* This function will try to resolve endpoint requirements by the
* given endpoint profiles that the USB hardware reports.
*
* Return values:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
static usb_error_t
usb_hw_ep_resolve(struct usb_device *udev,
struct usb_descriptor *desc)
{
struct usb_hw_ep_scratch *ues;
struct usb_hw_ep_scratch_sub *ep;
const struct usb_hw_ep_profile *pf;
struct usb_bus_methods *methods;
struct usb_device_descriptor *dd;
uint16_t mps;
if (desc == NULL) {
return (USB_ERR_INVAL);
}
/* get bus methods */
methods = udev->bus->methods;
if (methods->get_hw_ep_profile == NULL) {
return (USB_ERR_INVAL);
}
if (desc->bDescriptorType == UDESC_DEVICE) {
if (desc->bLength < sizeof(*dd)) {
return (USB_ERR_INVAL);
}
dd = (void *)desc;
/* get HW control endpoint 0 profile */
(methods->get_hw_ep_profile) (udev, &pf, 0);
if (pf == NULL) {
return (USB_ERR_INVAL);
}
if (!usb_hw_ep_match(pf, UE_CONTROL, 0)) {
DPRINTFN(0, "Endpoint 0 does not "
"support control\n");
return (USB_ERR_INVAL);
}
mps = dd->bMaxPacketSize;
if (udev->speed == USB_SPEED_FULL) {
/*
* We can optionally choose another packet size !
*/
while (1) {
/* check if "mps" is ok */
if (pf->max_in_frame_size >= mps) {
break;
}
/* reduce maximum packet size */
mps /= 2;
/* check if "mps" is too small */
if (mps < 8) {
return (USB_ERR_INVAL);
}
}
dd->bMaxPacketSize = mps;
} else {
/* We only have one choice */
if (mps == 255) {
mps = 512;
}
/* Check if we support the specified wMaxPacketSize */
if (pf->max_in_frame_size < mps) {
return (USB_ERR_INVAL);
}
}
return (0); /* success */
}
if (desc->bDescriptorType != UDESC_CONFIG) {
return (USB_ERR_INVAL);
}
if (desc->bLength < sizeof(*(ues->cd))) {
return (USB_ERR_INVAL);
}
ues = udev->bus->scratch[0].hw_ep_scratch;
bzero(ues, sizeof(*ues));
ues->ep_max = ues->ep;
ues->cd = (void *)desc;
ues->methods = methods;
ues->udev = udev;
/* Get all the endpoints we need */
if (usb_hw_ep_get_needs(ues, UE_ISOCHRONOUS, 0) ||
usb_hw_ep_get_needs(ues, UE_INTERRUPT, 0) ||
usb_hw_ep_get_needs(ues, UE_CONTROL, 0) ||
usb_hw_ep_get_needs(ues, UE_BULK, 0)) {
DPRINTFN(0, "Could not get needs\n");
return (USB_ERR_INVAL);
}
for (ep = ues->ep; ep != ues->ep_max; ep++) {
while (ep->needs_in || ep->needs_out) {
/*
* First try to use a simplex endpoint.
* Then try to use a duplex endpoint.
*/
if (usb_hw_ep_find_match(ues, ep, 1) &&
usb_hw_ep_find_match(ues, ep, 0)) {
DPRINTFN(0, "Could not find match\n");
return (USB_ERR_INVAL);
}
}
}
ues->ep_max = ues->ep;
/* Update all endpoint addresses */
if (usb_hw_ep_get_needs(ues, UE_ISOCHRONOUS, 1) ||
usb_hw_ep_get_needs(ues, UE_INTERRUPT, 1) ||
usb_hw_ep_get_needs(ues, UE_CONTROL, 1) ||
usb_hw_ep_get_needs(ues, UE_BULK, 1)) {
DPRINTFN(0, "Could not update endpoint address\n");
return (USB_ERR_INVAL);
}
return (0); /* success */
}
/*------------------------------------------------------------------------*
* usb_temp_get_tdd
*
* Returns:
* NULL: No USB template device descriptor found.
* Else: Pointer to the USB template device descriptor.
*------------------------------------------------------------------------*/
static const struct usb_temp_device_desc *
usb_temp_get_tdd(struct usb_device *udev)
{
if (udev->usb_template_ptr == NULL) {
return (NULL);
}
return (udev->usb_template_ptr->tdd);
}
/*------------------------------------------------------------------------*
* usb_temp_get_device_desc
*
* Returns:
* NULL: No USB device descriptor found.
* Else: Pointer to USB device descriptor.
*------------------------------------------------------------------------*/
static void *
usb_temp_get_device_desc(struct usb_device *udev)
{
struct usb_device_descriptor *dd;
if (udev->usb_template_ptr == NULL) {
return (NULL);
}
dd = &udev->usb_template_ptr->udd;
if (dd->bDescriptorType != UDESC_DEVICE) {
/* sanity check failed */
return (NULL);
}
return (dd);
}
/*------------------------------------------------------------------------*
* usb_temp_get_qualifier_desc
*
* Returns:
* NULL: No USB device_qualifier descriptor found.
* Else: Pointer to USB device_qualifier descriptor.
*------------------------------------------------------------------------*/
static void *
usb_temp_get_qualifier_desc(struct usb_device *udev)
{
struct usb_device_qualifier *dq;
if (udev->usb_template_ptr == NULL) {
return (NULL);
}
dq = &udev->usb_template_ptr->udq;
if (dq->bDescriptorType != UDESC_DEVICE_QUALIFIER) {
/* sanity check failed */
return (NULL);
}
return (dq);
}
/*------------------------------------------------------------------------*
* usb_temp_get_config_desc
*
* Returns:
* NULL: No USB config descriptor found.
* Else: Pointer to USB config descriptor having index "index".
*------------------------------------------------------------------------*/
static void *
usb_temp_get_config_desc(struct usb_device *udev,
uint16_t *pLength, uint8_t index)
{
struct usb_device_descriptor *dd;
struct usb_config_descriptor *cd;
uint16_t temp;
if (udev->usb_template_ptr == NULL) {
return (NULL);
}
dd = &udev->usb_template_ptr->udd;
cd = (void *)(udev->usb_template_ptr + 1);
if (index >= dd->bNumConfigurations) {
/* out of range */
return (NULL);
}
while (index--) {
if (cd->bDescriptorType != UDESC_CONFIG) {
/* sanity check failed */
return (NULL);
}
temp = UGETW(cd->wTotalLength);
cd = USB_ADD_BYTES(cd, temp);
}
if (pLength) {
*pLength = UGETW(cd->wTotalLength);
}
return (cd);
}
/*------------------------------------------------------------------------*
* usb_temp_get_vendor_desc
*
* Returns:
* NULL: No vendor descriptor found.
* Else: Pointer to a vendor descriptor.
*------------------------------------------------------------------------*/
static const void *
usb_temp_get_vendor_desc(struct usb_device *udev,
const struct usb_device_request *req)
{
const struct usb_temp_device_desc *tdd;
tdd = usb_temp_get_tdd(udev);
if (tdd == NULL) {
return (NULL);
}
if (tdd->getVendorDesc == NULL) {
return (NULL);
}
return ((tdd->getVendorDesc) (req));
}
/*------------------------------------------------------------------------*
* usb_temp_get_string_desc
*
* Returns:
* NULL: No string descriptor found.
* Else: Pointer to a string descriptor.
*------------------------------------------------------------------------*/
static const void *
usb_temp_get_string_desc(struct usb_device *udev,
uint16_t lang_id, uint8_t string_index)
{
const struct usb_temp_device_desc *tdd;
tdd = usb_temp_get_tdd(udev);
if (tdd == NULL) {
return (NULL);
}
if (tdd->getStringDesc == NULL) {
return (NULL);
}
return ((tdd->getStringDesc) (lang_id, string_index));
}
/*------------------------------------------------------------------------*
* usb_temp_get_hub_desc
*
* Returns:
* NULL: No USB HUB descriptor found.
* Else: Pointer to a USB HUB descriptor.
*------------------------------------------------------------------------*/
static const void *
usb_temp_get_hub_desc(struct usb_device *udev)
{
return (NULL); /* needs to be implemented */
}
/*------------------------------------------------------------------------*
* usb_temp_get_desc
*
* This function is a demultiplexer for local USB device side control
* endpoint requests.
*------------------------------------------------------------------------*/
static usb_error_t
usb_temp_get_desc(struct usb_device *udev, struct usb_device_request *req,
const void **pPtr, uint16_t *pLength)
{
const uint8_t *buf;
uint16_t len;
buf = NULL;
len = 0;
switch (req->bmRequestType) {
case UT_READ_DEVICE:
switch (req->bRequest) {
case UR_GET_DESCRIPTOR:
goto tr_handle_get_descriptor;
default:
goto tr_stalled;
}
break;
case UT_READ_CLASS_DEVICE:
switch (req->bRequest) {
case UR_GET_DESCRIPTOR:
goto tr_handle_get_class_descriptor;
default:
goto tr_stalled;
}
break;
case UT_READ_VENDOR_DEVICE:
case UT_READ_VENDOR_OTHER:
buf = usb_temp_get_vendor_desc(udev, req);
goto tr_valid;
default:
goto tr_stalled;
}
tr_handle_get_descriptor:
switch (req->wValue[1]) {
case UDESC_DEVICE:
if (req->wValue[0]) {
goto tr_stalled;
}
buf = usb_temp_get_device_desc(udev);
goto tr_valid;
case UDESC_DEVICE_QUALIFIER:
if (udev->speed != USB_SPEED_HIGH) {
goto tr_stalled;
}
if (req->wValue[0]) {
goto tr_stalled;
}
buf = usb_temp_get_qualifier_desc(udev);
goto tr_valid;
case UDESC_OTHER_SPEED_CONFIGURATION:
if (udev->speed != USB_SPEED_HIGH) {
goto tr_stalled;
}
case UDESC_CONFIG:
buf = usb_temp_get_config_desc(udev,
&len, req->wValue[0]);
goto tr_valid;
case UDESC_STRING:
buf = usb_temp_get_string_desc(udev,
UGETW(req->wIndex), req->wValue[0]);
goto tr_valid;
default:
goto tr_stalled;
}
goto tr_stalled;
tr_handle_get_class_descriptor:
if (req->wValue[0]) {
goto tr_stalled;
}
buf = usb_temp_get_hub_desc(udev);
goto tr_valid;
tr_valid:
if (buf == NULL) {
goto tr_stalled;
}
if (len == 0) {
len = buf[0];
}
*pPtr = buf;
*pLength = len;
return (0); /* success */
tr_stalled:
*pPtr = NULL;
*pLength = 0;
return (0); /* we ignore failures */
}
/*------------------------------------------------------------------------*
* usb_temp_setup
*
* This function generates USB descriptors according to the given USB
* template device descriptor. It will also try to figure out the best
* matching endpoint addresses using the hardware endpoint profiles.
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
static usb_error_t
usb_temp_setup(struct usb_device *udev,
const struct usb_temp_device_desc *tdd)
{
struct usb_temp_setup *uts;
void *buf;
uint8_t n;
if (tdd == NULL) {
/* be NULL safe */
return (0);
}
uts = udev->bus->scratch[0].temp_setup;
bzero(uts, sizeof(*uts));
uts->usb_speed = udev->speed;
uts->self_powered = udev->flags.self_powered;
/* first pass */
usb_make_device_desc(uts, tdd);
if (uts->err) {
/* some error happened */
return (uts->err);
}
/* sanity check */
if (uts->size == 0) {
return (USB_ERR_INVAL);
}
/* allocate zeroed memory */
uts->buf = malloc(uts->size, M_USB, M_WAITOK | M_ZERO);
if (uts->buf == NULL) {
/* could not allocate memory */
return (USB_ERR_NOMEM);
}
/* second pass */
uts->size = 0;
usb_make_device_desc(uts, tdd);
/*
* Store a pointer to our descriptors:
*/
udev->usb_template_ptr = uts->buf;
if (uts->err) {
/* some error happened during second pass */
goto error;
}
/*
* Resolve all endpoint addresses !
*/
buf = usb_temp_get_device_desc(udev);
uts->err = usb_hw_ep_resolve(udev, buf);
if (uts->err) {
DPRINTFN(0, "Could not resolve endpoints for "
"Device Descriptor, error = %s\n",
usbd_errstr(uts->err));
goto error;
}
for (n = 0;; n++) {
buf = usb_temp_get_config_desc(udev, NULL, n);
if (buf == NULL) {
break;
}
uts->err = usb_hw_ep_resolve(udev, buf);
if (uts->err) {
DPRINTFN(0, "Could not resolve endpoints for "
"Config Descriptor %u, error = %s\n", n,
usbd_errstr(uts->err));
goto error;
}
}
return (uts->err);
error:
usb_temp_unsetup(udev);
return (uts->err);
}
/*------------------------------------------------------------------------*
* usb_temp_unsetup
*
* This function frees any memory associated with the currently
* setup template, if any.
*------------------------------------------------------------------------*/
static void
usb_temp_unsetup(struct usb_device *udev)
{
if (udev->usb_template_ptr) {
free(udev->usb_template_ptr, M_USB);
udev->usb_template_ptr = NULL;
}
}
static usb_error_t
usb_temp_setup_by_index(struct usb_device *udev, uint16_t index)
{
usb_error_t err;
switch (index) {
case 0:
err = usb_temp_setup(udev, &usb_template_msc);
break;
case 1:
err = usb_temp_setup(udev, &usb_template_cdce);
break;
case 2:
err = usb_temp_setup(udev, &usb_template_mtp);
break;
default:
return (USB_ERR_INVAL);
}
return (err);
}
static void
usb_temp_init(void *arg)
{
/* register our functions */
usb_temp_get_desc_p = &usb_temp_get_desc;
usb_temp_setup_by_index_p = &usb_temp_setup_by_index;
usb_temp_unsetup_p = &usb_temp_unsetup;
}
SYSINIT(usb_temp_init, SI_SUB_LOCK, SI_ORDER_FIRST, usb_temp_init, NULL);
SYSUNINIT(usb_temp_unload, SI_SUB_LOCK, SI_ORDER_ANY, usb_temp_unload, NULL);
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