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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | mjames | 1 | /** |
| 2 | ****************************************************************************** |
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| 3 | * @file usbd_core.c |
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| 4 | * @author MCD Application Team |
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| 5 | * @brief This file provides all the USBD core functions. |
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| 6 | ****************************************************************************** |
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| 7 | * @attention |
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| 8 | * |
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| 9 | * <h2><center>© Copyright (c) 2015 STMicroelectronics. |
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| 10 | * All rights reserved.</center></h2> |
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| 11 | * |
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| 12 | * This software component is licensed by ST under Ultimate Liberty license |
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| 13 | * SLA0044, the "License"; You may not use this file except in compliance with |
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| 14 | * the License. You may obtain a copy of the License at: |
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| 15 | * www.st.com/SLA0044 |
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| 16 | * |
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| 17 | ****************************************************************************** |
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| 18 | */ |
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| 19 | |||
| 20 | /* Includes ------------------------------------------------------------------*/ |
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| 21 | #include "usbd_core.h" |
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| 22 | |||
| 23 | /** @addtogroup STM32_USBD_DEVICE_LIBRARY |
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| 24 | * @{ |
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| 25 | */ |
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| 26 | |||
| 27 | |||
| 28 | /** @defgroup USBD_CORE |
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| 29 | * @brief usbd core module |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | |||
| 33 | /** @defgroup USBD_CORE_Private_TypesDefinitions |
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| 34 | * @{ |
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| 35 | */ |
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| 36 | |||
| 37 | /** |
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| 38 | * @} |
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| 39 | */ |
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| 40 | |||
| 41 | |||
| 42 | /** @defgroup USBD_CORE_Private_Defines |
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| 43 | * @{ |
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| 44 | */ |
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| 45 | |||
| 46 | /** |
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| 47 | * @} |
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| 48 | */ |
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| 49 | |||
| 50 | |||
| 51 | /** @defgroup USBD_CORE_Private_Macros |
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| 52 | * @{ |
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| 53 | */ |
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| 54 | |||
| 55 | /** |
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| 56 | * @} |
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| 57 | */ |
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| 58 | |||
| 59 | |||
| 60 | /** @defgroup USBD_CORE_Private_FunctionPrototypes |
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| 61 | * @{ |
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| 62 | */ |
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| 63 | |||
| 64 | /** |
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| 65 | * @} |
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| 66 | */ |
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| 67 | |||
| 68 | /** @defgroup USBD_CORE_Private_Variables |
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| 69 | * @{ |
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| 70 | */ |
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| 71 | |||
| 72 | /** |
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| 73 | * @} |
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| 74 | */ |
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| 75 | |||
| 76 | |||
| 77 | /** @defgroup USBD_CORE_Private_Functions |
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| 78 | * @{ |
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| 79 | */ |
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| 80 | |||
| 81 | /** |
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| 82 | * @brief USBD_Init |
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| 83 | * Initializes the device stack and load the class driver |
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| 84 | * @param pdev: device instance |
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| 85 | * @param pdesc: Descriptor structure address |
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| 86 | * @param id: Low level core index |
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| 87 | * @retval None |
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| 88 | */ |
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| 89 | USBD_StatusTypeDef USBD_Init(USBD_HandleTypeDef *pdev, |
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| 90 | USBD_DescriptorsTypeDef *pdesc, uint8_t id) |
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| 91 | { |
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| 92 | /* Check whether the USB Host handle is valid */ |
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| 93 | if (pdev == NULL) |
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| 94 | { |
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| 95 | #if (USBD_DEBUG_LEVEL > 1U) |
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| 96 | USBD_ErrLog("Invalid Device handle"); |
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| 97 | #endif |
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| 98 | return USBD_FAIL; |
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| 99 | } |
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| 100 | |||
| 101 | /* Unlink previous class*/ |
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| 102 | if (pdev->pClass != NULL) |
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| 103 | { |
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| 104 | pdev->pClass = NULL; |
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| 105 | } |
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| 106 | |||
| 107 | /* Assign USBD Descriptors */ |
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| 108 | if (pdesc != NULL) |
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| 109 | { |
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| 110 | pdev->pDesc = pdesc; |
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| 111 | } |
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| 112 | |||
| 113 | /* Set Device initial State */ |
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| 114 | pdev->dev_state = USBD_STATE_DEFAULT; |
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| 115 | pdev->id = id; |
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| 116 | /* Initialize low level driver */ |
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| 117 | USBD_LL_Init(pdev); |
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| 118 | |||
| 119 | return USBD_OK; |
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| 120 | } |
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| 121 | |||
| 122 | /** |
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| 123 | * @brief USBD_DeInit |
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| 124 | * Re-Initialize th device library |
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| 125 | * @param pdev: device instance |
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| 126 | * @retval status: status |
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| 127 | */ |
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| 128 | USBD_StatusTypeDef USBD_DeInit(USBD_HandleTypeDef *pdev) |
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| 129 | { |
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| 130 | /* Set Default State */ |
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| 131 | pdev->dev_state = USBD_STATE_DEFAULT; |
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| 132 | |||
| 133 | /* Free Class Resources */ |
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| 134 | pdev->pClass->DeInit(pdev, (uint8_t)pdev->dev_config); |
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| 135 | |||
| 136 | /* Stop the low level driver */ |
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| 137 | USBD_LL_Stop(pdev); |
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| 138 | |||
| 139 | /* Initialize low level driver */ |
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| 140 | USBD_LL_DeInit(pdev); |
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| 141 | |||
| 142 | return USBD_OK; |
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| 143 | } |
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| 144 | |||
| 145 | /** |
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| 146 | * @brief USBD_RegisterClass |
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| 147 | * Link class driver to Device Core. |
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| 148 | * @param pDevice : Device Handle |
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| 149 | * @param pclass: Class handle |
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| 150 | * @retval USBD Status |
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| 151 | */ |
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| 152 | USBD_StatusTypeDef USBD_RegisterClass(USBD_HandleTypeDef *pdev, USBD_ClassTypeDef *pclass) |
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| 153 | { |
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| 154 | USBD_StatusTypeDef status = USBD_OK; |
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| 155 | if (pclass != NULL) |
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| 156 | { |
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| 157 | /* link the class to the USB Device handle */ |
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| 158 | pdev->pClass = pclass; |
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| 159 | status = USBD_OK; |
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| 160 | } |
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| 161 | else |
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| 162 | { |
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| 163 | #if (USBD_DEBUG_LEVEL > 1U) |
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| 164 | USBD_ErrLog("Invalid Class handle"); |
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| 165 | #endif |
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| 166 | status = USBD_FAIL; |
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| 167 | } |
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| 168 | |||
| 169 | return status; |
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| 170 | } |
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| 171 | |||
| 172 | /** |
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| 173 | * @brief USBD_Start |
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| 174 | * Start the USB Device Core. |
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| 175 | * @param pdev: Device Handle |
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| 176 | * @retval USBD Status |
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| 177 | */ |
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| 178 | USBD_StatusTypeDef USBD_Start(USBD_HandleTypeDef *pdev) |
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| 179 | { |
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| 180 | /* Start the low level driver */ |
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| 181 | USBD_LL_Start(pdev); |
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| 182 | |||
| 183 | return USBD_OK; |
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| 184 | } |
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| 185 | |||
| 186 | /** |
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| 187 | * @brief USBD_Stop |
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| 188 | * Stop the USB Device Core. |
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| 189 | * @param pdev: Device Handle |
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| 190 | * @retval USBD Status |
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| 191 | */ |
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| 192 | USBD_StatusTypeDef USBD_Stop(USBD_HandleTypeDef *pdev) |
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| 193 | { |
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| 194 | /* Free Class Resources */ |
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| 195 | pdev->pClass->DeInit(pdev, (uint8_t)pdev->dev_config); |
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| 196 | |||
| 197 | /* Stop the low level driver */ |
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| 198 | USBD_LL_Stop(pdev); |
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| 199 | |||
| 200 | return USBD_OK; |
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| 201 | } |
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| 202 | |||
| 203 | /** |
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| 204 | * @brief USBD_RunTestMode |
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| 205 | * Launch test mode process |
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| 206 | * @param pdev: device instance |
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| 207 | * @retval status |
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| 208 | */ |
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| 209 | USBD_StatusTypeDef USBD_RunTestMode(USBD_HandleTypeDef *pdev) |
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| 210 | { |
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| 211 | /* Prevent unused argument compilation warning */ |
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| 212 | UNUSED(pdev); |
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| 213 | |||
| 214 | return USBD_OK; |
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| 215 | } |
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| 216 | |||
| 217 | /** |
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| 218 | * @brief USBD_SetClassConfig |
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| 219 | * Configure device and start the interface |
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| 220 | * @param pdev: device instance |
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| 221 | * @param cfgidx: configuration index |
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| 222 | * @retval status |
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| 223 | */ |
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| 224 | |||
| 225 | USBD_StatusTypeDef USBD_SetClassConfig(USBD_HandleTypeDef *pdev, uint8_t cfgidx) |
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| 226 | { |
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| 227 | USBD_StatusTypeDef ret = USBD_FAIL; |
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| 228 | |||
| 229 | if (pdev->pClass != NULL) |
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| 230 | { |
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| 231 | /* Set configuration and Start the Class*/ |
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| 232 | if (pdev->pClass->Init(pdev, cfgidx) == 0U) |
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| 233 | { |
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| 234 | ret = USBD_OK; |
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| 235 | } |
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| 236 | } |
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| 237 | |||
| 238 | return ret; |
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| 239 | } |
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| 240 | |||
| 241 | /** |
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| 242 | * @brief USBD_ClrClassConfig |
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| 243 | * Clear current configuration |
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| 244 | * @param pdev: device instance |
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| 245 | * @param cfgidx: configuration index |
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| 246 | * @retval status: USBD_StatusTypeDef |
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| 247 | */ |
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| 248 | USBD_StatusTypeDef USBD_ClrClassConfig(USBD_HandleTypeDef *pdev, uint8_t cfgidx) |
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| 249 | { |
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| 250 | /* Clear configuration and De-initialize the Class process*/ |
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| 251 | pdev->pClass->DeInit(pdev, cfgidx); |
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| 252 | |||
| 253 | return USBD_OK; |
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| 254 | } |
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| 255 | |||
| 256 | |||
| 257 | /** |
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| 258 | * @brief USBD_SetupStage |
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| 259 | * Handle the setup stage |
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| 260 | * @param pdev: device instance |
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| 261 | * @retval status |
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| 262 | */ |
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| 263 | USBD_StatusTypeDef USBD_LL_SetupStage(USBD_HandleTypeDef *pdev, uint8_t *psetup) |
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| 264 | { |
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| 265 | USBD_ParseSetupRequest(&pdev->request, psetup); |
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| 266 | |||
| 267 | pdev->ep0_state = USBD_EP0_SETUP; |
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| 268 | |||
| 269 | pdev->ep0_data_len = pdev->request.wLength; |
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| 270 | |||
| 271 | switch (pdev->request.bmRequest & 0x1FU) |
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| 272 | { |
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| 273 | case USB_REQ_RECIPIENT_DEVICE: |
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| 274 | USBD_StdDevReq(pdev, &pdev->request); |
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| 275 | break; |
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| 276 | |||
| 277 | case USB_REQ_RECIPIENT_INTERFACE: |
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| 278 | USBD_StdItfReq(pdev, &pdev->request); |
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| 279 | break; |
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| 280 | |||
| 281 | case USB_REQ_RECIPIENT_ENDPOINT: |
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| 282 | USBD_StdEPReq(pdev, &pdev->request); |
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| 283 | break; |
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| 284 | |||
| 285 | default: |
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| 286 | USBD_LL_StallEP(pdev, (pdev->request.bmRequest & 0x80U)); |
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| 287 | break; |
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| 288 | } |
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| 289 | |||
| 290 | return USBD_OK; |
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| 291 | } |
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| 292 | |||
| 293 | /** |
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| 294 | * @brief USBD_DataOutStage |
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| 295 | * Handle data OUT stage |
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| 296 | * @param pdev: device instance |
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| 297 | * @param epnum: endpoint index |
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| 298 | * @retval status |
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| 299 | */ |
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| 300 | USBD_StatusTypeDef USBD_LL_DataOutStage(USBD_HandleTypeDef *pdev, |
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| 301 | uint8_t epnum, uint8_t *pdata) |
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| 302 | { |
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| 303 | USBD_EndpointTypeDef *pep; |
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| 304 | |||
| 305 | if (epnum == 0U) |
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| 306 | { |
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| 307 | pep = &pdev->ep_out[0]; |
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| 308 | |||
| 309 | if (pdev->ep0_state == USBD_EP0_DATA_OUT) |
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| 310 | { |
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| 311 | if (pep->rem_length > pep->maxpacket) |
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| 312 | { |
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| 313 | pep->rem_length -= pep->maxpacket; |
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| 314 | |||
| 315 | USBD_CtlContinueRx(pdev, pdata, |
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| 316 | (uint16_t)MIN(pep->rem_length, pep->maxpacket)); |
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| 317 | } |
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| 318 | else |
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| 319 | { |
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| 320 | if ((pdev->pClass->EP0_RxReady != NULL) && |
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| 321 | (pdev->dev_state == USBD_STATE_CONFIGURED)) |
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| 322 | { |
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| 323 | pdev->pClass->EP0_RxReady(pdev); |
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| 324 | } |
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| 325 | USBD_CtlSendStatus(pdev); |
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| 326 | } |
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| 327 | } |
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| 328 | else |
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| 329 | { |
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| 330 | if (pdev->ep0_state == USBD_EP0_STATUS_OUT) |
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| 331 | { |
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| 332 | /* |
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| 333 | * STATUS PHASE completed, update ep0_state to idle |
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| 334 | */ |
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| 335 | pdev->ep0_state = USBD_EP0_IDLE; |
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| 336 | USBD_LL_StallEP(pdev, 0U); |
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| 337 | } |
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| 338 | } |
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| 339 | } |
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| 340 | else if ((pdev->pClass->DataOut != NULL) && |
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| 341 | (pdev->dev_state == USBD_STATE_CONFIGURED)) |
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| 342 | { |
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| 343 | pdev->pClass->DataOut(pdev, epnum); |
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| 344 | } |
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| 345 | else |
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| 346 | { |
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| 347 | /* should never be in this condition */ |
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| 348 | return USBD_FAIL; |
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| 349 | } |
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| 350 | |||
| 351 | return USBD_OK; |
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| 352 | } |
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| 353 | |||
| 354 | /** |
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| 355 | * @brief USBD_DataInStage |
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| 356 | * Handle data in stage |
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| 357 | * @param pdev: device instance |
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| 358 | * @param epnum: endpoint index |
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| 359 | * @retval status |
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| 360 | */ |
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| 361 | USBD_StatusTypeDef USBD_LL_DataInStage(USBD_HandleTypeDef *pdev, |
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| 362 | uint8_t epnum, uint8_t *pdata) |
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| 363 | { |
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| 364 | USBD_EndpointTypeDef *pep; |
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| 365 | |||
| 366 | if (epnum == 0U) |
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| 367 | { |
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| 368 | pep = &pdev->ep_in[0]; |
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| 369 | |||
| 370 | if (pdev->ep0_state == USBD_EP0_DATA_IN) |
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| 371 | { |
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| 372 | if (pep->rem_length > pep->maxpacket) |
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| 373 | { |
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| 374 | pep->rem_length -= pep->maxpacket; |
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| 375 | |||
| 376 | USBD_CtlContinueSendData(pdev, pdata, (uint16_t)pep->rem_length); |
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| 377 | |||
| 378 | /* Prepare endpoint for premature end of transfer */ |
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| 379 | USBD_LL_PrepareReceive(pdev, 0U, NULL, 0U); |
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| 380 | } |
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| 381 | else |
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| 382 | { |
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| 383 | /* last packet is MPS multiple, so send ZLP packet */ |
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| 384 | if ((pep->total_length % pep->maxpacket == 0U) && |
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| 385 | (pep->total_length >= pep->maxpacket) && |
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| 386 | (pep->total_length < pdev->ep0_data_len)) |
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| 387 | { |
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| 388 | USBD_CtlContinueSendData(pdev, NULL, 0U); |
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| 389 | pdev->ep0_data_len = 0U; |
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| 390 | |||
| 391 | /* Prepare endpoint for premature end of transfer */ |
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| 392 | USBD_LL_PrepareReceive(pdev, 0U, NULL, 0U); |
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| 393 | } |
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| 394 | else |
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| 395 | { |
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| 396 | if ((pdev->pClass->EP0_TxSent != NULL) && |
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| 397 | (pdev->dev_state == USBD_STATE_CONFIGURED)) |
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| 398 | { |
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| 399 | pdev->pClass->EP0_TxSent(pdev); |
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| 400 | } |
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| 401 | USBD_LL_StallEP(pdev, 0x80U); |
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| 402 | USBD_CtlReceiveStatus(pdev); |
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| 403 | } |
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| 404 | } |
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| 405 | } |
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| 406 | else |
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| 407 | { |
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| 408 | if ((pdev->ep0_state == USBD_EP0_STATUS_IN) || |
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| 409 | (pdev->ep0_state == USBD_EP0_IDLE)) |
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| 410 | { |
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| 411 | USBD_LL_StallEP(pdev, 0x80U); |
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| 412 | } |
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| 413 | } |
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| 414 | |||
| 415 | if (pdev->dev_test_mode == 1U) |
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| 416 | { |
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| 417 | USBD_RunTestMode(pdev); |
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| 418 | pdev->dev_test_mode = 0U; |
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| 419 | } |
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| 420 | } |
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| 421 | else if ((pdev->pClass->DataIn != NULL) && |
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| 422 | (pdev->dev_state == USBD_STATE_CONFIGURED)) |
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| 423 | { |
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| 424 | pdev->pClass->DataIn(pdev, epnum); |
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| 425 | } |
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| 426 | else |
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| 427 | { |
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| 428 | /* should never be in this condition */ |
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| 429 | return USBD_FAIL; |
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| 430 | } |
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| 431 | |||
| 432 | return USBD_OK; |
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| 433 | } |
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| 434 | |||
| 435 | /** |
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| 436 | * @brief USBD_LL_Reset |
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| 437 | * Handle Reset event |
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| 438 | * @param pdev: device instance |
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| 439 | * @retval status |
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| 440 | */ |
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| 441 | |||
| 442 | USBD_StatusTypeDef USBD_LL_Reset(USBD_HandleTypeDef *pdev) |
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| 443 | { |
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| 444 | /* Open EP0 OUT */ |
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| 445 | USBD_LL_OpenEP(pdev, 0x00U, USBD_EP_TYPE_CTRL, USB_MAX_EP0_SIZE); |
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| 446 | pdev->ep_out[0x00U & 0xFU].is_used = 1U; |
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| 447 | |||
| 448 | pdev->ep_out[0].maxpacket = USB_MAX_EP0_SIZE; |
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| 449 | |||
| 450 | /* Open EP0 IN */ |
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| 451 | USBD_LL_OpenEP(pdev, 0x80U, USBD_EP_TYPE_CTRL, USB_MAX_EP0_SIZE); |
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| 452 | pdev->ep_in[0x80U & 0xFU].is_used = 1U; |
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| 453 | |||
| 454 | pdev->ep_in[0].maxpacket = USB_MAX_EP0_SIZE; |
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| 455 | |||
| 456 | /* Upon Reset call user call back */ |
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| 457 | pdev->dev_state = USBD_STATE_DEFAULT; |
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| 458 | pdev->ep0_state = USBD_EP0_IDLE; |
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| 459 | pdev->dev_config = 0U; |
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| 460 | pdev->dev_remote_wakeup = 0U; |
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| 461 | |||
| 462 | if (pdev->pClassData) |
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| 463 | { |
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| 464 | pdev->pClass->DeInit(pdev, (uint8_t)pdev->dev_config); |
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| 465 | } |
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| 466 | |||
| 467 | return USBD_OK; |
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| 468 | } |
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| 469 | |||
| 470 | /** |
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| 471 | * @brief USBD_LL_Reset |
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| 472 | * Handle Reset event |
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| 473 | * @param pdev: device instance |
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| 474 | * @retval status |
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| 475 | */ |
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| 476 | USBD_StatusTypeDef USBD_LL_SetSpeed(USBD_HandleTypeDef *pdev, |
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| 477 | USBD_SpeedTypeDef speed) |
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| 478 | { |
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| 479 | pdev->dev_speed = speed; |
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| 480 | |||
| 481 | return USBD_OK; |
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| 482 | } |
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| 483 | |||
| 484 | /** |
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| 485 | * @brief USBD_Suspend |
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| 486 | * Handle Suspend event |
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| 487 | * @param pdev: device instance |
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| 488 | * @retval status |
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| 489 | */ |
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| 490 | |||
| 491 | USBD_StatusTypeDef USBD_LL_Suspend(USBD_HandleTypeDef *pdev) |
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| 492 | { |
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| 493 | pdev->dev_old_state = pdev->dev_state; |
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| 494 | pdev->dev_state = USBD_STATE_SUSPENDED; |
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| 495 | |||
| 496 | return USBD_OK; |
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| 497 | } |
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| 498 | |||
| 499 | /** |
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| 500 | * @brief USBD_Resume |
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| 501 | * Handle Resume event |
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| 502 | * @param pdev: device instance |
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| 503 | * @retval status |
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| 504 | */ |
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| 505 | |||
| 506 | USBD_StatusTypeDef USBD_LL_Resume(USBD_HandleTypeDef *pdev) |
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| 507 | { |
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| 508 | if (pdev->dev_state == USBD_STATE_SUSPENDED) |
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| 509 | { |
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| 510 | pdev->dev_state = pdev->dev_old_state; |
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| 511 | } |
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| 512 | |||
| 513 | return USBD_OK; |
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| 514 | } |
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| 515 | |||
| 516 | /** |
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| 517 | * @brief USBD_SOF |
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| 518 | * Handle SOF event |
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| 519 | * @param pdev: device instance |
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| 520 | * @retval status |
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| 521 | */ |
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| 522 | |||
| 523 | USBD_StatusTypeDef USBD_LL_SOF(USBD_HandleTypeDef *pdev) |
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| 524 | { |
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| 525 | if (pdev->dev_state == USBD_STATE_CONFIGURED) |
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| 526 | { |
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| 527 | if (pdev->pClass->SOF != NULL) |
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| 528 | { |
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| 529 | pdev->pClass->SOF(pdev); |
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| 530 | } |
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| 531 | } |
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| 532 | |||
| 533 | return USBD_OK; |
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| 534 | } |
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| 535 | |||
| 536 | /** |
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| 537 | * @brief USBD_IsoINIncomplete |
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| 538 | * Handle iso in incomplete event |
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| 539 | * @param pdev: device instance |
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| 540 | * @retval status |
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| 541 | */ |
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| 542 | USBD_StatusTypeDef USBD_LL_IsoINIncomplete(USBD_HandleTypeDef *pdev, |
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| 543 | uint8_t epnum) |
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| 544 | { |
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| 545 | /* Prevent unused arguments compilation warning */ |
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| 546 | UNUSED(pdev); |
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| 547 | UNUSED(epnum); |
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| 548 | |||
| 549 | return USBD_OK; |
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| 550 | } |
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| 551 | |||
| 552 | /** |
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| 553 | * @brief USBD_IsoOUTIncomplete |
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| 554 | * Handle iso out incomplete event |
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| 555 | * @param pdev: device instance |
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| 556 | * @retval status |
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| 557 | */ |
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| 558 | USBD_StatusTypeDef USBD_LL_IsoOUTIncomplete(USBD_HandleTypeDef *pdev, |
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| 559 | uint8_t epnum) |
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| 560 | { |
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| 561 | /* Prevent unused arguments compilation warning */ |
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| 562 | UNUSED(pdev); |
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| 563 | UNUSED(epnum); |
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| 564 | |||
| 565 | return USBD_OK; |
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| 566 | } |
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| 567 | |||
| 568 | /** |
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| 569 | * @brief USBD_DevConnected |
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| 570 | * Handle device connection event |
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| 571 | * @param pdev: device instance |
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| 572 | * @retval status |
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| 573 | */ |
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| 574 | USBD_StatusTypeDef USBD_LL_DevConnected(USBD_HandleTypeDef *pdev) |
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| 575 | { |
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| 576 | /* Prevent unused argument compilation warning */ |
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| 577 | UNUSED(pdev); |
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| 578 | |||
| 579 | return USBD_OK; |
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| 580 | } |
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| 581 | |||
| 582 | /** |
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| 583 | * @brief USBD_DevDisconnected |
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| 584 | * Handle device disconnection event |
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| 585 | * @param pdev: device instance |
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| 586 | * @retval status |
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| 587 | */ |
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| 588 | USBD_StatusTypeDef USBD_LL_DevDisconnected(USBD_HandleTypeDef *pdev) |
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| 589 | { |
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| 590 | /* Free Class Resources */ |
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| 591 | pdev->dev_state = USBD_STATE_DEFAULT; |
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| 592 | pdev->pClass->DeInit(pdev, (uint8_t)pdev->dev_config); |
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| 593 | |||
| 594 | return USBD_OK; |
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| 595 | } |
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| 596 | /** |
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| 597 | * @} |
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| 598 | */ |
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| 599 | |||
| 600 | |||
| 601 | /** |
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| 602 | * @} |
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| 603 | */ |
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| 604 | |||
| 605 | |||
| 606 | /** |
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| 607 | * @} |
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| 608 | */ |
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| 609 | |||
| 610 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
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| 611 |