--- /dev/null
+/**
+ ******************************************************************************
+ * @file usbh_stdreq.c
+ * @author MCD Application Team
+ * @version V2.0.0
+ * @date 22-July-2011
+ * @brief This file implements the standard requests for device enumeration
+ ******************************************************************************
+ * @attention
+ *
+ * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
+ * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
+ * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
+ * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
+ * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
+ * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+ *
+ * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
+ ******************************************************************************
+ */
+/* 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
+* @{
+*/
+/**
+* @}
+*/
+
+
+/** @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,
+ uint8_t *buf,
+ uint16_t length);
+static USBH_DescHeader_t *USBH_GetNextDesc (uint8_t *pbuf,
+ uint16_t *ptr);
+
+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;
+
+ if((status = USBH_GetDescriptor(pdev,
+ phost,
+ USB_REQ_RECIPIENT_DEVICE | USB_REQ_TYPE_STANDARD,
+ USB_DESC_CONFIGURATION,
+ pdev->host.Rx_Buffer,
+ length)) == USBH_OK)
+ {
+ /* Commands successfully sent and Response Received */
+ USBH_ParseCfgDesc (&phost->device_prop.Cfg_Desc,
+ phost->device_prop.Itf_Desc,
+ phost->device_prop.Ep_Desc[0],
+ 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_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,
+ uint8_t *buf,
+ uint16_t length)
+{
+ USBH_InterfaceDesc_TypeDef *pif ;
+ USBH_EpDesc_TypeDef *pep;
+ USBH_DescHeader_t *pdesc = (USBH_DescHeader_t *)buf;
+ uint16_t ptr;
+ int8_t if_ix;
+ int8_t ep_ix;
+
+ 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)
+ {
+ if_ix = 0;
+ pif = (USBH_InterfaceDesc_TypeDef *)0;
+
+ /* Parse Interface descriptor relative to the current configuration */
+ if(cfg_desc->bNumInterfaces <= USBH_MAX_NUM_INTERFACES)
+ {
+ while (if_ix < cfg_desc->bNumInterfaces)
+ {
+ pdesc = USBH_GetNextDesc((uint8_t *)pdesc, &ptr);
+ if (pdesc->bDescriptorType == USB_DESC_TYPE_INTERFACE)
+ {
+ pif = &itf_desc[if_ix];
+ USBH_ParseInterfaceDesc (pif, (uint8_t *)pdesc);
+ ep_ix = 0;
+
+ /* Parse Ep descriptors relative to the current interface */
+ if(pif->bNumEndpoints <= USBH_MAX_NUM_ENDPOINTS)
+ {
+ while (ep_ix < pif->bNumEndpoints)
+ {
+ pdesc = USBH_GetNextDesc((void* )pdesc, &ptr);
+ if (pdesc->bDescriptorType == USB_DESC_TYPE_ENDPOINT)
+ {
+ pep = &ep_desc[ep_ix];
+ USBH_ParseEPDesc (pep, (uint8_t *)pdesc);
+ ep_ix++;
+ }
+ else
+ {
+ ptr += pdesc->bLength;
+ }
+ }
+ }
+ if_ix++;
+ }
+ else
+ {
+ ptr += pdesc->bLength;
+ }
+ }
+ }
+ }
+ }
+}
+
+
+/**
+* @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
+*/
+static 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 2011 STMicroelectronics *****END OF FILE****/
+
+
+
+
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