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circuitpython/stm/stmusbh/usbh_stdreq.c

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/**
******************************************************************************
* @file usbh_stdreq.c
* @author MCD Application Team
* @version V2.1.0
* @date 19-March-2012
* @brief This file implements the standard requests for device enumeration
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "usbh_ioreq.h"
#include "usbh_stdreq.h"
/** @addtogroup USBH_LIB
* @{
*/
/** @addtogroup USBH_LIB_CORE
* @{
*/
/** @defgroup USBH_STDREQ
* @brief This file implements the standard requests for device enumeration
* @{
*/
/** @defgroup USBH_STDREQ_Private_Defines
* @{
*/
/**
* @}
*/
/** @defgroup USBH_STDREQ_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @defgroup USBH_STDREQ_Private_Macros
* @{
*/
/**
* @}
*/
/** @defgroup USBH_STDREQ_Private_Variables
* @{
*/
/**
* @}
*/
#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint8_t USBH_CfgDesc[512] __ALIGN_END ;
/** @defgroup USBH_STDREQ_Private_FunctionPrototypes
* @{
*/
static void USBH_ParseDevDesc (USBH_DevDesc_TypeDef* , uint8_t *buf, uint16_t length);
static void USBH_ParseCfgDesc (USBH_CfgDesc_TypeDef* cfg_desc,
USBH_InterfaceDesc_TypeDef* itf_desc,
USBH_EpDesc_TypeDef ep_desc[][USBH_MAX_NUM_ENDPOINTS],
uint8_t *buf,
uint16_t length);
static void USBH_ParseInterfaceDesc (USBH_InterfaceDesc_TypeDef *if_descriptor, uint8_t *buf);
static void USBH_ParseEPDesc (USBH_EpDesc_TypeDef *ep_descriptor, uint8_t *buf);
static void USBH_ParseStringDesc (uint8_t* psrc, uint8_t* pdest, uint16_t length);
/**
* @}
*/
/** @defgroup USBH_STDREQ_Private_Functions
* @{
*/
/**
* @brief USBH_Get_DevDesc
* Issue Get Device Descriptor command to the device. Once the response
* received, it parses the device descriptor and updates the status.
* @param pdev: Selected device
* @param dev_desc: Device Descriptor buffer address
* @param pdev->host.Rx_Buffer: Receive Buffer address
* @param length: Length of the descriptor
* @retval Status
*/
USBH_Status USBH_Get_DevDesc(USB_OTG_CORE_HANDLE *pdev,
USBH_HOST *phost,
uint8_t length)
{
USBH_Status status;
if((status = USBH_GetDescriptor(pdev,
phost,
USB_REQ_RECIPIENT_DEVICE | USB_REQ_TYPE_STANDARD,
USB_DESC_DEVICE,
pdev->host.Rx_Buffer,
length)) == USBH_OK)
{
/* Commands successfully sent and Response Received */
USBH_ParseDevDesc(&phost->device_prop.Dev_Desc, pdev->host.Rx_Buffer, length);
}
return status;
}
/**
* @brief USBH_Get_CfgDesc
* Issues Configuration Descriptor to the device. Once the response
* received, it parses the configuartion descriptor and updates the
* status.
* @param pdev: Selected device
* @param cfg_desc: Configuration Descriptor address
* @param itf_desc: Interface Descriptor address
* @param ep_desc: Endpoint Descriptor address
* @param length: Length of the descriptor
* @retval Status
*/
USBH_Status USBH_Get_CfgDesc(USB_OTG_CORE_HANDLE *pdev,
USBH_HOST *phost,
uint16_t length)
{
USBH_Status status;
uint16_t index = 0;
if((status = USBH_GetDescriptor(pdev,
phost,
USB_REQ_RECIPIENT_DEVICE | USB_REQ_TYPE_STANDARD,
USB_DESC_CONFIGURATION,
pdev->host.Rx_Buffer,
length)) == USBH_OK)
{
/*save Cfg descriptor for class parsing usage */
for( ; index < length ; index ++)
{
USBH_CfgDesc[index] = pdev->host.Rx_Buffer[index];
}
/* Commands successfully sent and Response Received */
USBH_ParseCfgDesc (&phost->device_prop.Cfg_Desc,
phost->device_prop.Itf_Desc,
phost->device_prop.Ep_Desc,
pdev->host.Rx_Buffer,
length);
}
return status;
}
/**
* @brief USBH_Get_StringDesc
* Issues string Descriptor command to the device. Once the response
* received, it parses the string descriptor and updates the status.
* @param pdev: Selected device
* @param string_index: String index for the descriptor
* @param buff: Buffer address for the descriptor
* @param length: Length of the descriptor
* @retval Status
*/
USBH_Status USBH_Get_StringDesc(USB_OTG_CORE_HANDLE *pdev,
USBH_HOST *phost,
uint8_t string_index,
uint8_t *buff,
uint16_t length)
{
USBH_Status status;
if((status = USBH_GetDescriptor(pdev,
phost,
USB_REQ_RECIPIENT_DEVICE | USB_REQ_TYPE_STANDARD,
USB_DESC_STRING | string_index,
pdev->host.Rx_Buffer,
length)) == USBH_OK)
{
/* Commands successfully sent and Response Received */
USBH_ParseStringDesc(pdev->host.Rx_Buffer,buff, length);
}
return status;
}
/**
* @brief USBH_GetDescriptor
* Issues Descriptor command to the device. Once the response received,
* it parses the descriptor and updates the status.
* @param pdev: Selected device
* @param req_type: Descriptor type
* @param value_idx: wValue for the GetDescriptr request
* @param buff: Buffer to store the descriptor
* @param length: Length of the descriptor
* @retval Status
*/
USBH_Status USBH_GetDescriptor(USB_OTG_CORE_HANDLE *pdev,
USBH_HOST *phost,
uint8_t req_type,
uint16_t value_idx,
uint8_t* buff,
uint16_t length )
{
phost->Control.setup.b.bmRequestType = USB_D2H | req_type;
phost->Control.setup.b.bRequest = USB_REQ_GET_DESCRIPTOR;
phost->Control.setup.b.wValue.w = value_idx;
if ((value_idx & 0xff00) == USB_DESC_STRING)
{
phost->Control.setup.b.wIndex.w = 0x0409;
}
else
{
phost->Control.setup.b.wIndex.w = 0;
}
phost->Control.setup.b.wLength.w = length;
return USBH_CtlReq(pdev, phost, buff , length );
}
/**
* @brief USBH_SetAddress
* This command sets the address to the connected device
* @param pdev: Selected device
* @param DeviceAddress: Device address to assign
* @retval Status
*/
USBH_Status USBH_SetAddress(USB_OTG_CORE_HANDLE *pdev,
USBH_HOST *phost,
uint8_t DeviceAddress)
{
phost->Control.setup.b.bmRequestType = USB_H2D | USB_REQ_RECIPIENT_DEVICE | \
USB_REQ_TYPE_STANDARD;
phost->Control.setup.b.bRequest = USB_REQ_SET_ADDRESS;
phost->Control.setup.b.wValue.w = (uint16_t)DeviceAddress;
phost->Control.setup.b.wIndex.w = 0;
phost->Control.setup.b.wLength.w = 0;
return USBH_CtlReq(pdev, phost, 0 , 0 );
}
/**
* @brief USBH_SetCfg
* The command sets the configuration value to the connected device
* @param pdev: Selected device
* @param cfg_idx: Configuration value
* @retval Status
*/
USBH_Status USBH_SetCfg(USB_OTG_CORE_HANDLE *pdev,
USBH_HOST *phost,
uint16_t cfg_idx)
{
phost->Control.setup.b.bmRequestType = USB_H2D | USB_REQ_RECIPIENT_DEVICE |\
USB_REQ_TYPE_STANDARD;
phost->Control.setup.b.bRequest = USB_REQ_SET_CONFIGURATION;
phost->Control.setup.b.wValue.w = cfg_idx;
phost->Control.setup.b.wIndex.w = 0;
phost->Control.setup.b.wLength.w = 0;
return USBH_CtlReq(pdev, phost, 0 , 0 );
}
/**
* @brief USBH_SetInterface
* The command sets the Interface value to the connected device
* @param pdev: Selected device
* @param itf_idx: Interface value
* @retval Status
*/
USBH_Status USBH_SetInterface(USB_OTG_CORE_HANDLE *pdev,
USBH_HOST *phost,
uint8_t ep_num, uint8_t altSetting)
{
phost->Control.setup.b.bmRequestType = USB_H2D | USB_REQ_RECIPIENT_INTERFACE | \
USB_REQ_TYPE_STANDARD;
phost->Control.setup.b.bRequest = USB_REQ_SET_INTERFACE;
phost->Control.setup.b.wValue.w = altSetting;
phost->Control.setup.b.wIndex.w = ep_num;
phost->Control.setup.b.wLength.w = 0;
return USBH_CtlReq(pdev, phost, 0 , 0 );
}
/**
* @brief USBH_ClrFeature
* This request is used to clear or disable a specific feature.
* @param pdev: Selected device
* @param ep_num: endpoint number
* @param hc_num: Host channel number
* @retval Status
*/
USBH_Status USBH_ClrFeature(USB_OTG_CORE_HANDLE *pdev,
USBH_HOST *phost,
uint8_t ep_num,
uint8_t hc_num)
{
phost->Control.setup.b.bmRequestType = USB_H2D |
USB_REQ_RECIPIENT_ENDPOINT |
USB_REQ_TYPE_STANDARD;
phost->Control.setup.b.bRequest = USB_REQ_CLEAR_FEATURE;
phost->Control.setup.b.wValue.w = FEATURE_SELECTOR_ENDPOINT;
phost->Control.setup.b.wIndex.w = ep_num;
phost->Control.setup.b.wLength.w = 0;
if ((ep_num & USB_REQ_DIR_MASK ) == USB_D2H)
{ /* EP Type is IN */
pdev->host.hc[hc_num].toggle_in = 0;
}
else
{/* EP Type is OUT */
pdev->host.hc[hc_num].toggle_out = 0;
}
return USBH_CtlReq(pdev, phost, 0 , 0 );
}
/**
* @brief USBH_ParseDevDesc
* This function Parses the device descriptor
* @param dev_desc: device_descriptor destinaton address
* @param buf: Buffer where the source descriptor is available
* @param length: Length of the descriptor
* @retval None
*/
static void USBH_ParseDevDesc (USBH_DevDesc_TypeDef* dev_desc,
uint8_t *buf,
uint16_t length)
{
dev_desc->bLength = *(uint8_t *) (buf + 0);
dev_desc->bDescriptorType = *(uint8_t *) (buf + 1);
dev_desc->bcdUSB = LE16 (buf + 2);
dev_desc->bDeviceClass = *(uint8_t *) (buf + 4);
dev_desc->bDeviceSubClass = *(uint8_t *) (buf + 5);
dev_desc->bDeviceProtocol = *(uint8_t *) (buf + 6);
dev_desc->bMaxPacketSize = *(uint8_t *) (buf + 7);
if (length > 8)
{ /* For 1st time after device connection, Host may issue only 8 bytes for
Device Descriptor Length */
dev_desc->idVendor = LE16 (buf + 8);
dev_desc->idProduct = LE16 (buf + 10);
dev_desc->bcdDevice = LE16 (buf + 12);
dev_desc->iManufacturer = *(uint8_t *) (buf + 14);
dev_desc->iProduct = *(uint8_t *) (buf + 15);
dev_desc->iSerialNumber = *(uint8_t *) (buf + 16);
dev_desc->bNumConfigurations = *(uint8_t *) (buf + 17);
}
}
/**
* @brief USBH_ParseCfgDesc
* This function Parses the configuration descriptor
* @param cfg_desc: Configuration Descriptor address
* @param itf_desc: Interface Descriptor address
* @param ep_desc: Endpoint Descriptor address
* @param buf: Buffer where the source descriptor is available
* @param length: Length of the descriptor
* @retval None
*/
static void USBH_ParseCfgDesc (USBH_CfgDesc_TypeDef* cfg_desc,
USBH_InterfaceDesc_TypeDef* itf_desc,
USBH_EpDesc_TypeDef ep_desc[][USBH_MAX_NUM_ENDPOINTS],
uint8_t *buf,
uint16_t length)
{
USBH_InterfaceDesc_TypeDef *pif ;
USBH_InterfaceDesc_TypeDef temp_pif ;
USBH_EpDesc_TypeDef *pep;
USBH_DescHeader_t *pdesc = (USBH_DescHeader_t *)buf;
uint16_t ptr;
int8_t if_ix = 0;
int8_t ep_ix = 0;
static uint16_t prev_ep_size = 0;
static uint8_t prev_itf = 0;
pdesc = (USBH_DescHeader_t *)buf;
/* Parse configuration descriptor */
cfg_desc->bLength = *(uint8_t *) (buf + 0);
cfg_desc->bDescriptorType = *(uint8_t *) (buf + 1);
cfg_desc->wTotalLength = LE16 (buf + 2);
cfg_desc->bNumInterfaces = *(uint8_t *) (buf + 4);
cfg_desc->bConfigurationValue = *(uint8_t *) (buf + 5);
cfg_desc->iConfiguration = *(uint8_t *) (buf + 6);
cfg_desc->bmAttributes = *(uint8_t *) (buf + 7);
cfg_desc->bMaxPower = *(uint8_t *) (buf + 8);
if (length > USB_CONFIGURATION_DESC_SIZE)
{
ptr = USB_LEN_CFG_DESC;
if ( cfg_desc->bNumInterfaces <= USBH_MAX_NUM_INTERFACES)
{
pif = (USBH_InterfaceDesc_TypeDef *)0;
while (ptr < cfg_desc->wTotalLength )
{
pdesc = USBH_GetNextDesc((uint8_t *)pdesc, &ptr);
if (pdesc->bDescriptorType == USB_DESC_TYPE_INTERFACE)
{
if_ix = *(((uint8_t *)pdesc ) + 2);
pif = &itf_desc[if_ix];
if((*((uint8_t *)pdesc + 3)) < 3)
{
USBH_ParseInterfaceDesc (&temp_pif, (uint8_t *)pdesc);
ep_ix = 0;
/* Parse Ep descriptors relative to the current interface */
if(temp_pif.bNumEndpoints <= USBH_MAX_NUM_ENDPOINTS)
{
while (ep_ix < temp_pif.bNumEndpoints)
{
pdesc = USBH_GetNextDesc((void* )pdesc, &ptr);
if (pdesc->bDescriptorType == USB_DESC_TYPE_ENDPOINT)
{
pep = &ep_desc[if_ix][ep_ix];
if(prev_itf != if_ix)
{
prev_itf = if_ix;
USBH_ParseInterfaceDesc (pif, (uint8_t *)&temp_pif);
}
else
{
if(prev_ep_size > LE16((uint8_t *)pdesc + 4))
{
break;
}
else
{
USBH_ParseInterfaceDesc (pif, (uint8_t *)&temp_pif);
}
}
USBH_ParseEPDesc (pep, (uint8_t *)pdesc);
prev_ep_size = LE16((uint8_t *)pdesc + 4);
ep_ix++;
}
}
}
}
}
}
}
prev_ep_size = 0;
prev_itf = 0;
}
}
/**
* @brief USBH_ParseInterfaceDesc
* This function Parses the interface descriptor
* @param if_descriptor : Interface descriptor destination
* @param buf: Buffer where the descriptor data is available
* @retval None
*/
static void USBH_ParseInterfaceDesc (USBH_InterfaceDesc_TypeDef *if_descriptor,
uint8_t *buf)
{
if_descriptor->bLength = *(uint8_t *) (buf + 0);
if_descriptor->bDescriptorType = *(uint8_t *) (buf + 1);
if_descriptor->bInterfaceNumber = *(uint8_t *) (buf + 2);
if_descriptor->bAlternateSetting = *(uint8_t *) (buf + 3);
if_descriptor->bNumEndpoints = *(uint8_t *) (buf + 4);
if_descriptor->bInterfaceClass = *(uint8_t *) (buf + 5);
if_descriptor->bInterfaceSubClass = *(uint8_t *) (buf + 6);
if_descriptor->bInterfaceProtocol = *(uint8_t *) (buf + 7);
if_descriptor->iInterface = *(uint8_t *) (buf + 8);
}
/**
* @brief USBH_ParseEPDesc
* This function Parses the endpoint descriptor
* @param ep_descriptor: Endpoint descriptor destination address
* @param buf: Buffer where the parsed descriptor stored
* @retval None
*/
static void USBH_ParseEPDesc (USBH_EpDesc_TypeDef *ep_descriptor,
uint8_t *buf)
{
ep_descriptor->bLength = *(uint8_t *) (buf + 0);
ep_descriptor->bDescriptorType = *(uint8_t *) (buf + 1);
ep_descriptor->bEndpointAddress = *(uint8_t *) (buf + 2);
ep_descriptor->bmAttributes = *(uint8_t *) (buf + 3);
ep_descriptor->wMaxPacketSize = LE16 (buf + 4);
ep_descriptor->bInterval = *(uint8_t *) (buf + 6);
}
/**
* @brief USBH_ParseStringDesc
* This function Parses the string descriptor
* @param psrc: Source pointer containing the descriptor data
* @param pdest: Destination address pointer
* @param length: Length of the descriptor
* @retval None
*/
static void USBH_ParseStringDesc (uint8_t* psrc,
uint8_t* pdest,
uint16_t length)
{
uint16_t strlength;
uint16_t idx;
/* The UNICODE string descriptor is not NULL-terminated. The string length is
computed by substracting two from the value of the first byte of the descriptor.
*/
/* Check which is lower size, the Size of string or the length of bytes read
from the device */
if ( psrc[1] == USB_DESC_TYPE_STRING)
{ /* Make sure the Descriptor is String Type */
/* psrc[0] contains Size of Descriptor, subtract 2 to get the length of string */
strlength = ( ( (psrc[0]-2) <= length) ? (psrc[0]-2) :length);
psrc += 2; /* Adjust the offset ignoring the String Len and Descriptor type */
for (idx = 0; idx < strlength; idx+=2 )
{/* Copy Only the string and ignore the UNICODE ID, hence add the src */
*pdest = psrc[idx];
pdest++;
}
*pdest = 0; /* mark end of string */
}
}
/**
* @brief USBH_GetNextDesc
* This function return the next descriptor header
* @param buf: Buffer where the cfg descriptor is available
* @param ptr: data popinter inside the cfg descriptor
* @retval next header
*/
USBH_DescHeader_t *USBH_GetNextDesc (uint8_t *pbuf, uint16_t *ptr)
{
USBH_DescHeader_t *pnext;
*ptr += ((USBH_DescHeader_t *)pbuf)->bLength;
pnext = (USBH_DescHeader_t *)((uint8_t *)pbuf + \
((USBH_DescHeader_t *)pbuf)->bLength);
return(pnext);
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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