From 22781883e073a764779a36fe1a0b02baf8f946a0 Mon Sep 17 00:00:00 2001 From: gdisirio Date: Sun, 30 Jan 2011 19:18:26 +0000 Subject: [PATCH] Merged the USB branch and made the needed adjustments, not tested yet. git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@2695 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/hal.mk | 4 +- os/hal/include/hal.h | 2 + os/hal/include/serial_usb.h | 178 ++++++++++ os/hal/include/usb.h | 329 ++++++++++++++++++ os/hal/include/usb_cdc.h | 73 ++++ os/hal/platforms/STM32/platform.mk | 1 + os/hal/platforms/STM32/stm32_usb.h | 221 ++++++++++++ os/hal/platforms/STM32/usb_lld.c | 507 +++++++++++++++++++++++++++ os/hal/platforms/STM32/usb_lld.h | 284 +++++++++++++++ os/hal/src/hal.c | 10 +- os/hal/src/serial_usb.c | 328 +++++++++++++++++ os/hal/src/usb.c | 541 +++++++++++++++++++++++++++++ readme.txt | 7 + 13 files changed, 2482 insertions(+), 3 deletions(-) create mode 100644 os/hal/include/serial_usb.h create mode 100644 os/hal/include/usb.h create mode 100644 os/hal/include/usb_cdc.h create mode 100644 os/hal/platforms/STM32/stm32_usb.h create mode 100644 os/hal/platforms/STM32/usb_lld.c create mode 100644 os/hal/platforms/STM32/usb_lld.h create mode 100644 os/hal/src/serial_usb.c create mode 100644 os/hal/src/usb.c diff --git a/os/hal/hal.mk b/os/hal/hal.mk index 2a6c6826b..233ac66d1 100644 --- a/os/hal/hal.mk +++ b/os/hal/hal.mk @@ -10,7 +10,9 @@ HALSRC = ${CHIBIOS}/os/hal/src/hal.c \ ${CHIBIOS}/os/hal/src/serial.c \ ${CHIBIOS}/os/hal/src/spi.c \ ${CHIBIOS}/os/hal/src/uart.c \ - ${CHIBIOS}/os/hal/src/mmc_spi.c + ${CHIBIOS}/os/hal/src/usb.c \ + ${CHIBIOS}/os/hal/src/mmc_spi.c \ + ${CHIBIOS}/os/hal/src/serial_usb.c # Required include directories HALINC = ${CHIBIOS}/os/hal/include diff --git a/os/hal/include/hal.h b/os/hal/include/hal.h index 2039036b1..822dafc35 100644 --- a/os/hal/include/hal.h +++ b/os/hal/include/hal.h @@ -42,7 +42,9 @@ #include "serial.h" #include "spi.h" #include "uart.h" +#include "usb.h" #include "mmc_spi.h" +#include "serial_usb.h" /*===========================================================================*/ /* External declarations. */ diff --git a/os/hal/include/serial_usb.h b/os/hal/include/serial_usb.h new file mode 100644 index 000000000..b75f6fe59 --- /dev/null +++ b/os/hal/include/serial_usb.h @@ -0,0 +1,178 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/** + * @file serial_usb.h + * @brief Serial over USB Driver macros and structures. + * + * @addtogroup SERIAL_USB + * @{ + */ + +#ifndef _SERIAL_USB_H_ +#define _SERIAL_USB_H_ + +#if HAL_USE_SERIAL_USB || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver constants. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver pre-compile time settings. */ +/*===========================================================================*/ + +/** + * @brief Serial over USB buffers size. + * @details Configuration parameter, the buffer size must be a multiple of + * the USB data endpoint maximum packet size. + * @note The default is 64 bytes for both the transmission and receive + * buffers. + */ +#if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__) +#define SERIAL_USB_BUFFERS_SIZE 64 +#endif + +/*===========================================================================*/ +/* Derived constants and error checks. */ +/*===========================================================================*/ + +#if !HAL_USE_USB && !CH_USE_EVENTS +#error "Serial over USB Driver requires HAL_USE_USB and CH_USE_EVENTS" +#endif + +/*===========================================================================*/ +/* Driver data structures and types. */ +/*===========================================================================*/ + +/** + * @brief Driver state machine possible states. + */ +typedef enum { + SDU_UNINIT = 0, /**< Not initialized. */ + SDU_STOP = 1, /**< Stopped. */ + SDU_READY = 2 /**< Ready. */ +} sdustate_t; + +/** + * @brief Structure representing a serial over USB driver. + */ +typedef struct SerialUSBDriver SerialUSBDriver; + +/** + * @brief Serial over USB Driver configuration structure. + * @details An instance of this structure must be passed to @p sduStart() + * in order to configure and start the driver operations. + */ +typedef struct { + /** + * @brief USB driver to use. + */ + USBDriver *usbp; + /** + * @brief USB driver configuration structure. + */ + USBConfig usb_config; + /* + * @brief Endpoint used for data transmission. + */ + usbep_t data_request_ep; + /* + * @brief Endpoint used for data reception. + */ + usbep_t data_available_ep; + /* + * @brief Endpoint used for interrupt request. + */ + usbep_t interrupt_request_ep; +} SerialUSBConfig; + +/** + * @brief @p SerialDriver specific data. + */ +#define _serial_usb_driver_data \ + _base_asynchronous_channel_data \ + /* Driver state.*/ \ + sdustate_t state; \ + /* Input queue.*/ \ + InputQueue iqueue; \ + /* Output queue.*/ \ + OutputQueue oqueue; \ + /* Input circular buffer.*/ \ + uint8_t ib[SERIAL_USB_BUFFERS_SIZE]; \ + /* Output circular buffer.*/ \ + uint8_t ob[SERIAL_USB_BUFFERS_SIZE]; \ + /* End of the mandatory fields.*/ \ + /* Current configuration data.*/ \ + const SerialUSBConfig *config; + +/** + * @brief @p SerialUSBDriver specific methods. + */ +#define _serial_usb_driver_methods \ + _base_asynchronous_channel_methods + +/** + * @brief @p SerialDriver virtual methods table. + */ +struct SerialUSBDriverVMT { + _serial_usb_driver_methods +}; + +/** + * @extends BaseAsynchronousChannel + * + * @brief Full duplex serial driver class. + * @details This class extends @p BaseAsynchronousChannel by adding physical + * I/O queues. + */ +struct SerialUSBDriver { + /** @brief Virtual Methods Table.*/ + const struct SerialUSBDriverVMT *vmt; + _serial_usb_driver_data +}; + +/*===========================================================================*/ +/* Driver macros. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* External declarations. */ +/*===========================================================================*/ + +#ifdef __cplusplus +extern "C" { +#endif + void sduInit(void); + void sduObjectInit(SerialUSBDriver *sdp); + void sduStart(SerialUSBDriver *sdup, const SerialUSBConfig *config); + void sduStop(SerialUSBDriver *sdup); + bool_t sduRequestsHook(USBDriver *usbp); + void sduDataRequest(USBDriver *usbp, usbep_t ep); + void sduDataAvailable(USBDriver *usbp, usbep_t ep); + void sduInterruptRequest(USBDriver *usbp, usbep_t ep); +#ifdef __cplusplus +} +#endif + +#endif /* HAL_USE_SERIAL_USB */ + +#endif /* _SERIAL_USB_H_ */ + +/** @} */ diff --git a/os/hal/include/usb.h b/os/hal/include/usb.h new file mode 100644 index 000000000..e6fc8b868 --- /dev/null +++ b/os/hal/include/usb.h @@ -0,0 +1,329 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/** + * @file usb.h + * @brief USB Driver macros and structures. + * + * @addtogroup USB + * @{ + */ + +#ifndef _USB_H_ +#define _USB_H_ + +#if HAL_USE_USB || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver constants. */ +/*===========================================================================*/ + +#define USB_RTYPE_DIR_MASK 0x80 +#define USB_RTYPE_DIR_HOST2DEV 0x00 +#define USB_RTYPE_DIR_DEV2HOST 0x80 +#define USB_RTYPE_TYPE_MASK 0x60 +#define USB_RTYPE_TYPE_STD 0x00 +#define USB_RTYPE_TYPE_CLASS 0x20 +#define USB_RTYPE_TYPE_VENDOR 0x40 +#define USB_RTYPE_TYPE_RESERVED 0x60 +#define USB_RTYPE_RECIPIENT_MASK 0x1F +#define USB_RTYPE_RECIPIENT_DEVICE 0x00 +#define USB_RTYPE_RECIPIENT_INTERFACE 0x01 +#define USB_RTYPE_RECIPIENT_ENDPOINT 0x02 +#define USB_RTYPE_RECIPIENT_OTHER 0x03 + +#define USB_REQ_GET_STATUS 0 +#define USB_REQ_CLEAR_FEATURE 1 +#define USB_REQ_SET_FEATURE 3 +#define USB_REQ_SET_ADDRESS 5 +#define USB_REQ_GET_DESCRIPTOR 6 +#define USB_REQ_SET_DESCRIPTOR 7 +#define USB_REQ_GET_CONFIGURATION 8 +#define USB_REQ_SET_CONFIGURATION 9 +#define USB_REQ_GET_INTERFACE 10 +#define USB_REQ_SET_INTERFACE 11 +#define USB_REQ_SYNCH_FRAME 12 + +#define USB_DESCRIPTOR_DEVICE 1 +#define USB_DESCRIPTOR_CONFIGURATION 2 +#define USB_DESCRIPTOR_STRING 3 +#define USB_DESCRIPTOR_INTERFACE 4 +#define USB_DESCRIPTOR_ENDPOINT 5 +#define USB_DESCRIPTOR_DEVICE_QUALIFIER 6 +#define USB_DESCRIPTOR_OTHER_SPEED_CFG 7 +#define USB_DESCRIPTOR_INTERFACE_POWER 8 + +#define USB_FEATURE_ENDPOINT_HALT 0 +#define USB_FEATURE_DEVICE_REMOTE_WAKEUP 1 +#define USB_FEATURE_TEST_MODE 2 + +/*===========================================================================*/ +/* Driver pre-compile time settings. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Derived constants and error checks. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver data structures and types. */ +/*===========================================================================*/ + +/** + * @brief Type of a structure representing an USB driver. + */ +typedef struct USBDriver USBDriver; + +/** + * @brief Type of an endpoint identifier. + */ +typedef uint8_t usbep_t; + +/** + * @brief Type of a driver state machine possible states. + */ +typedef enum { + USB_UNINIT = 0, /**< Not initialized. */ + USB_STOP = 1, /**< Stopped. */ + USB_READY = 2, /**< Ready, after bus reset. */ + USB_SELECTED = 3, /**< Address assigned. */ + USB_ACTIVE = 4, /**< Active, configuration selected.*/ +} usbstate_t; + +/** + * @brief Type of an endpoint type. + */ +typedef enum { + EP_TYPE_CTRL = 0, /**< Control endpoint. */ + EP_TYPE_ISOC = 1, /**< Isochronous endpoint. */ + EP_TYPE_BULK = 2, /**< Bulk endpoint. */ + EP_TYPE_INTR = 3 /**< Interrupt endpoint. */ +} usbeptype_t; + +/** + * @brief Type of an endpoint status. + */ +typedef enum { + EP_STATUS_DISABLED = 0, /**< Endpoint not opened. */ + EP_STATUS_STALLED = 1, /**< Endpoint opened but stalled. */ + EP_STATUS_ACTIVE = 2 /**< Active endpoint. */ +} usbepstatus_t; + +/** + * @brief Type of an endpoint zero state machine states. + */ +typedef enum { + USB_EP0_WAITING_SETUP, /**< Waiting for SETUP data. */ + USB_EP0_TX, /**< Trasmitting. */ + USB_EP0_WAITING_STS, /**< Waiting status. */ + USB_EP0_RX, /**< Receiving. */ + USB_EP0_SENDING_STS /**< Sending status. */ +} usbep0state_t; + +/** + * @brief Type of an enumeration of the possible USB events. + */ +typedef enum { + USB_EVENT_RESET = 0, /**< Driver has been reset by host. */ + USB_EVENT_ADDRESS = 1, /**< Address assigned. */ + USB_EVENT_CONFIGURED = 2, /**< Configuration selected. */ + USB_EVENT_SUSPEND = 3, /**< Entering suspend mode. */ + USB_EVENT_RESUME = 4, /**< Leaving suspend mode. */ + USB_EVENT_STALLED = 5, /**< Endpoint 0 error, stalled. */ +} usbevent_t; + +/** + * @brief Type of an USB descriptor. + */ +typedef struct { + /** + * @brief Descriptor size in unicode characters. + */ + size_t ud_size; + /** + * @brief Pointer to the descriptor. + */ + const uint8_t *ud_string; +} USBDescriptor; + +/** + * @brief Type of an USB generic notification callback. + * + * @param[in] usbp pointer to the @p USBDriver object triggering the + * callback + */ +typedef void (*usbcallback_t)(USBDriver *usbp); + +/** + * @brief Type of an USB endpoint callback. + * + * @param[in] usbp pointer to the @p USBDriver object triggering the + * callback + * @param[in] ep endpoint number + */ +typedef void (*usbepcallback_t)(USBDriver *usbp, usbep_t ep); + +/** + * @brief Type of an USB event notification callback. + * + * @param[in] usbp pointer to the @p USBDriver object triggering the + * callback + * @param[in] event event type + */ +typedef void (*usbeventcb_t)(USBDriver *usbp, usbevent_t event); + +/** + * @brief Type of a requests handler callback. + * @details The request is encoded in the @p usb_setup buffer. + * + * @param[in] usbp pointer to the @p USBDriver object triggering the + * callback + * @return The request handling exit code. + * @retval FALSE Request not recognized by the handler. + * @retval TRUE Request handled. + */ +typedef bool_t (*usbreqhandler_t)(USBDriver *usbp); + +/** + * @brief Type of an USB descriptor-retrieving callback. + */ +typedef const USBDescriptor * (*usbgetdescriptor_t)(USBDriver *usbp, + uint8_t dtype, + uint8_t dindex, + uint16_t lang); + +#include "usb_lld.h" + +/*===========================================================================*/ +/* Driver macros. */ +/*===========================================================================*/ +/** + * @brief Returns the current frame number. + * + * @param[in] usbp pointer to the @p USBDriver object + * @return The current frame number. + * + * @notapi + */ +#define usbGetFrameNumber(usbp) usb_lld_get_frame_number(usbp) + +/** + * @brief Returns the number of bytes readable from the receive packet + * buffer. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * @return The number of bytes that are effectively available. + * @retval 0 Data not yet available. + * + * @iclass + */ +#define usbGetReadableI(usbp, ep) usb_lld_get_readable(usbp, ep) + +/** + * @brief Endpoint read. + * @details The buffered packet is copied into the user buffer and then + * the endpoint is brought to the valid state in order to allow + * reception of more data. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * @param[out] buf buffer where to copy the endpoint data + * @param[in] n maximum number of bytes to copy + * @return The number of bytes that were effectively available. + * @retval 0 Data not yet available. + * + * @iclass + */ +#define usbReadI(usbp, ep, buf, n) usb_lld_read(usbp, ep, buf, n) + +/** + * @brief Returns the number of bytes writeable to the transmit packet + * buffer. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * @return The number of bytes that can be written. + * @retval 0 Endpoint not ready for transmission. + * + * @iclass + */ +#define usbGetWriteableI(usbp, ep) usb_lld_get_readable(usbp, ep) + +/** + * @brief Endpoint write. + * @details The user data is copied in the packer memory and then + * the endpoint is brought to the valid state in order to allow + * transmission. + * + * @param[in] usbp pointer to the @p USBDriver object triggering the + * callback + * @param[in] ep endpoint number + * @param[in] buf buffer where to copy the endpoint data + * @param[in] n maximum number of bytes to copy + * @return The number of bytes that were effectively written. + * @retval 0 Endpoint not ready for transmission. + * + * @iclass + */ +#define usbWriteI(usbp, ep, buf, n) usb_lld_write(usbp, ep, buf, n) + +/** + * @brief Request transfer setup. + * @details This macro is used by the request handling callbacks in order to + * prepare a transaction over the endpoint zero. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] buf pointer to a buffer for the transaction data + * @param[in] n number of bytes to be transferred + * @param[in] endcb transfer complete callback + * + * @api + */ +#define usbSetupTransfer(usbp, buf, n, endcb) { \ + (usbp)->usb_ep0next = (buf); \ + (usbp)->usb_ep0n = (n); \ + (usbp)->usb_ep0endcb = (endcb); \ +} + +/*===========================================================================*/ +/* External declarations. */ +/*===========================================================================*/ + +#ifdef __cplusplus +extern "C" { +#endif + void usbInit(void); + void usbObjectInit(USBDriver *usbp); + void usbStart(USBDriver *usbp, const USBConfig *config); + void usbStop(USBDriver *usbp); + void usbEnableEndpointI(USBDriver *usbp, usbep_t ep, + const USBEndpointConfig *epcp); + void _usb_reset(USBDriver *usbp); + void _usb_ep0in(USBDriver *usbp, usbep_t ep); + void _usb_ep0out(USBDriver *usbp, usbep_t ep); +#ifdef __cplusplus +} +#endif + +#endif /* HAL_USE_USB */ + +#endif /* _USB_H_ */ + +/** @} */ diff --git a/os/hal/include/usb_cdc.h b/os/hal/include/usb_cdc.h new file mode 100644 index 000000000..c1d3da3e7 --- /dev/null +++ b/os/hal/include/usb_cdc.h @@ -0,0 +1,73 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/** + * @file usb_cdc.h + * @brief USB Communication Device Class support header. + * + * @addtogroup USB_CDC + * @{ + */ + +#ifndef _USB_CDC_H_ +#define _USB_CDC_H_ + +#define CDC_SEND_ENCAPSULATED_COMMAND 0x00 +#define CDC_GET_ENCAPSULATED_RESPONSE 0x01 +#define CDC_SET_COMM_FEATURE 0x02 +#define CDC_GET_COMM_FEATURE 0x03 +#define CDC_CLEAR_COMM_FEATURE 0x04 +#define CDC_SET_AUX_LINE_STATE 0x10 +#define CDC_SET_HOOK_STATE 0x11 +#define CDC_PULSE_SETUP 0x12 +#define CDC_SEND_PULSE 0x13 +#define CDC_SET_PULSE_TIME 0x14 +#define CDC_RING_AUX_JACK 0x15 +#define CDC_SET_LINE_CODING 0x20 +#define CDC_GET_LINE_CODING 0x21 +#define CDC_SET_CONTROL_LINE_STATE 0x22 +#define CDC_SEND_BREAK 0x23 +#define CDC_SET_RINGER_PARMS 0x30 +#define CDC_GET_RINGER_PARMS 0x31 +#define CDC_SET_OPERATION_PARMS 0x32 +#define CDC_GET_OPERATION_PARMS 0x33 + +/** + * @brief Type of Line Coding structure. + */ +typedef struct { + uint8_t dwDTERate[4]; + uint8_t bCharFormat; + uint8_t bParityType; + uint8_t bDataBits; +} cdc_linecoding_t; + +#define LC_STOP_1 0 +#define LC_STOP_1P5 1 +#define LC_STOP_2 2 + +#define LC_PARITY_NONE 0 +#define LC_PARITY_ODD 1 +#define LC_PARITY_EVEN 2 +#define LC_PARITY_MARK 3 +#define LC_PARITY_SPACE 4 + +#endif /* _USB_CDC_H_ */ + +/** @} */ diff --git a/os/hal/platforms/STM32/platform.mk b/os/hal/platforms/STM32/platform.mk index 35e732116..ceadcea62 100644 --- a/os/hal/platforms/STM32/platform.mk +++ b/os/hal/platforms/STM32/platform.mk @@ -7,6 +7,7 @@ PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/STM32/hal_lld.c \ ${CHIBIOS}/os/hal/platforms/STM32/serial_lld.c \ ${CHIBIOS}/os/hal/platforms/STM32/spi_lld.c \ ${CHIBIOS}/os/hal/platforms/STM32/uart_lld.c \ + ${CHIBIOS}/os/hal/platforms/STM32/usb_lld.c \ ${CHIBIOS}/os/hal/platforms/STM32/stm32_dma.c # Required include directories diff --git a/os/hal/platforms/STM32/stm32_usb.h b/os/hal/platforms/STM32/stm32_usb.h new file mode 100644 index 000000000..8c04ba85f --- /dev/null +++ b/os/hal/platforms/STM32/stm32_usb.h @@ -0,0 +1,221 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/** + * @file stm32_usb.h + * @brief STM32 USB registers layout header. + * @note This file requires definitions from the ST STM32 header file + * stm3232f10x.h. + * + * @addtogroup STM32_USB + * @{ + */ + +#ifndef _STM32_USB_H_ +#define _STM32_USB_H_ + +/** + * @brief Number of the available endpoints. + * @details This value does not include the endpoint 0 which is always present. + */ +#define USB_ENDOPOINTS_NUMBER 7 + +/** + * @brief USB registers block. + */ +typedef struct { + /** + * @brief Endpoint registers. + */ + volatile uint32_t EPR[USB_ENDOPOINTS_NUMBER + 1]; + /* + * @brief Reserved space. + */ + volatile uint32_t _r20[8]; + /* + * @brief Control Register. + */ + volatile uint32_t CNTR; + /* + * @brief Interrupt Status Register. + */ + volatile uint32_t ISTR; + /* + * @brief Frame Number Register. + */ + volatile uint32_t FNR; + /* + * @brief Device Address Register. + */ + volatile uint32_t DADDR; + /* + * @brief Buffer Table Address. + */ + volatile uint32_t BTABLE; +} stm32_usb_t; + +/** + * @brief USB descriptor registers block. + */ +typedef struct { + /** + * @brief TX buffer offset register. + */ + volatile uint32_t TXADDR; + /** + * @brief TX counter register. + */ + volatile uint32_t TXCOUNT; + /** + * @brief RX buffer offset register. + */ + volatile uint32_t RXADDR; + /** + * @brief RX counter register. + */ + volatile uint32_t RXCOUNT; +} stm32_usb_descriptor_t; + +/** + * @brief USB registers block numeric address. + */ +#define STM32_USB_BASE (APB1PERIPH_BASE + 0x5C00) + +/** + * @brief USB RAM numeric address. + */ +#define STM32_USBRAM_BASE (APB1PERIPH_BASE + 0x6000) + +/** + * @brief Pointer to the USB registers block. + */ +#define STM32_USB ((stm32_usb_t *)STM32_USB_BASE) + +/** + * @brief Pointer to the USB RAM. + */ +#define STM32_USBRAM ((uint32_t *)STM32_USBRAM_BASE) + +/** + * @brief Mask of all the toggling bits in the EPR register. + */ +#define EPR_TOGGLE_MASK (EPR_STAT_TX_MASK | EPR_DTOG_TX | \ + EPR_STAT_RX_MASK | EPR_DTOG_RX | \ + EPR_SETUP) + +#define EPR_EA_MASK 0x000F +#define EPR_STAT_TX_MASK 0x0030 +#define EPR_STAT_TX_DIS 0x0000 +#define EPR_STAT_TX_STALL 0x0010 +#define EPR_STAT_TX_NAK 0x0020 +#define EPR_STAT_TX_VALID 0x0030 +#define EPR_DTOG_TX 0x0040 +#define EPR_CTR_TX 0x0080 +#define EPR_EP_KIND 0x0100 +#define EPR_EP_TYPE_MASK 0x0600 +#define EPR_EP_TYPE_BULK 0x0000 +#define EPR_EP_TYPE_CONTROL 0x0200 +#define EPR_EP_TYPE_ISO 0x0400 +#define EPR_EP_TYPE_INTERRUPT 0x0600 +#define EPR_SETUP 0x0800 +#define EPR_STAT_RX_MASK 0x3000 +#define EPR_STAT_RX_DIS 0x0000 +#define EPR_STAT_RX_STALL 0x1000 +#define EPR_STAT_RX_NAK 0x2000 +#define EPR_STAT_RX_VALID 0x3000 +#define EPR_DTOG_RX 0x4000 +#define EPR_CTR_RX 0x8000 + +#define CNTR_FRES 0x0001 +#define CNTR_PDWN 0x0002 +#define CNTR_LP_MODE 0x0004 +#define CNTR_FSUSP 0x0008 +#define CNTR_RESUME 0x0010 +#define CNTR_ESOFM 0x0100 +#define CNTR_SOFM 0x0200 +#define CNTR_RESETM 0x0400 +#define CNTR_SUSPM 0x0800 +#define CNTR_WKUPM 0x1000 +#define CNTR_ERRM 0x2000 +#define CNTR_PMAOVRM 0x4000 +#define CNTR_CTRM 0x8000 + +#define ISTR_EP_ID_MASK 0x000F +#define ISTR_DIR 0x0010 +#define ISTR_ESOF 0x0100 +#define ISTR_SOF 0x0200 +#define ISTR_RESET 0x0400 +#define ISTR_SUSP 0x0800 +#define ISTR_WKUP 0x1000 +#define ISTR_ERR 0x2000 +#define ISTR_PMAOVR 0x4000 +#define ISTR_CTR 0x8000 + +#define FNR_FN_MASK 0x07FF +#define FNR_LSOF 0x1800 +#define FNR_LCK 0x2000 +#define FNR_RXDM 0x4000 +#define FNR_RXDP 0x8000 + +#define DADDR_ADD_MASK 0x007F +#define DADDR_EF 0x0080 + +#define RXCOUNT_COUNT_MASK 0x03FF +#define TXCOUNT_COUNT_MASK 0x03FF + +#define EPR_SET(ep, epr) \ + STM32_USB->EPR[ep] = (epr) & ~EPR_TOGGLE_MASK + +#define EPR_TOGGLE(ep, epr) \ + STM32_USB->EPR[ep] = (STM32_USB->EPR[ep] ^ ((epr) & EPR_TOGGLE_MASK)) + +#define EPR_SET_STAT_RX(ep, epr) \ + STM32_USB->EPR[ep] = (STM32_USB->EPR[ep] & \ + ~(EPR_TOGGLE_MASK & ~EPR_STAT_RX_MASK)) ^ \ + (epr) + +#define EPR_SET_STAT_TX(ep, epr) \ + STM32_USB->EPR[ep] = (STM32_USB->EPR[ep] & \ + ~(EPR_TOGGLE_MASK & ~EPR_STAT_TX_MASK)) ^ \ + (epr) + +#define EPR_CLEAR_CTR_RX(ep) \ + STM32_USB->EPR[ep] &= ~EPR_CTR_RX & ~EPR_TOGGLE_MASK + +#define EPR_CLEAR_CTR_TX(ep) \ + STM32_USB->EPR[ep] &= ~EPR_CTR_TX & ~EPR_TOGGLE_MASK + +/** + * @brief Returns an endpoint descriptor pointer. + */ +#define USB_GET_DESCRIPTOR(ep) \ + ((stm32_usb_descriptor_t *)((uint32_t)STM32_USBRAM_BASE + \ + (uint32_t)STM32_USB->BTABLE * 2 + \ + (uint32_t)(ep) * \ + sizeof(stm32_usb_descriptor_t))) + +/** + * @brief Converts from a PMA address to a physical address. + */ +#define USB_ADDR2PTR(addr) \ + ((uint32_t *)((addr) * 2 + STM32_USBRAM_BASE)) + +#endif /* _STM32_USB_H_ */ + +/** @} */ diff --git a/os/hal/platforms/STM32/usb_lld.c b/os/hal/platforms/STM32/usb_lld.c new file mode 100644 index 000000000..91be0f625 --- /dev/null +++ b/os/hal/platforms/STM32/usb_lld.c @@ -0,0 +1,507 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/** + * @file STM32/usb_lld.c + * @brief STM32 USB subsystem low level driver source. + * + * @addtogroup USB + * @{ + */ + +#include "ch.h" +#include "hal.h" +#include "usb.h" + +#if HAL_USE_USB || defined(__DOXYGEN__) + +#define BTABLE_ADDR 0x0000 + +/*===========================================================================*/ +/* Driver exported variables. */ +/*===========================================================================*/ + +/** @brief USB1 driver identifier.*/ +#if STM32_USB_USE_USB1 || defined(__DOXYGEN__) +USBDriver USBD1; +#endif + +/** + * @brief EP0 initialization structure. + */ +const USBEndpointConfig usb_lld_ep0config = { + _usb_ep0in, + _usb_ep0out, + 0x40, + 0x40, + EPR_EP_TYPE_CONTROL | EPR_STAT_TX_STALL | EPR_STAT_RX_VALID, + 0x40, + 0x80 +}; + +/*===========================================================================*/ +/* Driver local variables. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver local functions. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver interrupt handlers. */ +/*===========================================================================*/ + +#if STM32_USB_USE_USB1 || defined(__DOXYGEN__) +/** + * @brief USB high priority interrupt handler. + * + * @isr + */ +CH_IRQ_HANDLER(USB_HP_IRQHandler) { + + CH_IRQ_PROLOGUE(); + + CH_IRQ_EPILOGUE(); +} + +/** + * @brief USB low priority interrupt handler. + * + * @isr + */ +CH_IRQ_HANDLER(USB_LP_IRQHandler) { + uint32_t istr; + USBDriver *usbp = &USBD1; + + CH_IRQ_PROLOGUE(); + + istr = STM32_USB->ISTR; + + /* USB bus reset condition handling.*/ + if (istr & ISTR_RESET) { + _usb_reset(usbp); + if (usbp->usb_config->uc_event_cb) + usbp->usb_config->uc_event_cb(usbp, USB_EVENT_RESET); + STM32_USB->ISTR = ~ISTR_RESET; + } + + /* SOF handling.*/ + if (istr & ISTR_SOF) { + if (usbp->usb_config->uc_sof_cb) + usbp->usb_config->uc_sof_cb(usbp); + STM32_USB->ISTR = ~ISTR_SOF; + } + + /* Endpoint events handling.*/ + while (istr & ISTR_CTR) { + uint32_t ep; + uint32_t epr = STM32_USB->EPR[ep = istr & ISTR_EP_ID_MASK]; + + if (epr & EPR_CTR_TX) { + /* IN endpoint, transmission.*/ + EPR_CLEAR_CTR_TX(ep); + if (usbp->usb_epc[ep]->uepc_in_cb) + usbp->usb_epc[ep]->uepc_in_cb(usbp, ep); + } + if (epr & EPR_CTR_RX) { + /* OUT endpoint, receive.*/ + EPR_CLEAR_CTR_RX(ep); + if (usbp->usb_epc[ep]->uepc_out_cb) + usbp->usb_epc[ep]->uepc_out_cb(usbp, ep); + } + istr = STM32_USB->ISTR; + } + + CH_IRQ_EPILOGUE(); +} +#endif + +/*===========================================================================*/ +/* Driver exported functions. */ +/*===========================================================================*/ + +/** + * @brief Low level USB driver initialization. + * + * @notapi + */ +void usb_lld_init(void) { + + /* USB reset, ensures reset state in order to avoid trouble with JTAGs.*/ + RCC->APB1RSTR = RCC_APB1RSTR_USBRST; + RCC->APB1RSTR = 0; + + /* Driver initialization.*/ + usbObjectInit(&USBD1); +} + +/** + * @brief Configures and activates the USB peripheral. + * + * @param[in] usbp pointer to the @p USBDriver object + * + * @notapi + */ +void usb_lld_start(USBDriver *usbp) { + + if (usbp->usb_state == USB_STOP) { + /* Clock activation.*/ +#if STM32_USB_USE_USB1 + if (&USBD1 == usbp) { + /* USB clock enabled.*/ + RCC->APB1ENR |= RCC_APB1ENR_USBEN; + /* Powers up the transceiver while holding the USB in reset state.*/ + STM32_USB->CNTR = CNTR_FRES; + /* Enabling the USB IRQ vectors, this also gives enough time to allow + the transceiver power up (1uS).*/ + NVICEnableVector(USB_HP_CAN1_TX_IRQn, + CORTEX_PRIORITY_MASK(STM32_USB_USB1_HP_IRQ_PRIORITY)); + NVICEnableVector(USB_LP_CAN1_RX0_IRQn, + CORTEX_PRIORITY_MASK(STM32_USB_USB1_LP_IRQ_PRIORITY)); + + /* Reset procedure enforced on driver start.*/ + _usb_reset(&USBD1); + } +#endif + } + /* Configuration.*/ +} + +/** + * @brief Deactivates the USB peripheral. + * + * @param[in] usbp pointer to the @p USBDriver object + * + * @notapi + */ +void usb_lld_stop(USBDriver *usbp) { + + /* If in ready state then disables the USB clock.*/ + if (usbp->usb_state == USB_STOP) { +#if STM32_ADC_USE_ADC1 + if (&USBD1 == usbp) { + NVICDisableVector(USB_HP_CAN1_TX_IRQn); + NVICDisableVector(USB_LP_CAN1_RX0_IRQn); + RCC->APB1ENR &= ~RCC_APB1ENR_USBEN; + } +#endif + } +} + +/** + * @brief USB low level reset routine. + * + * @param[in] usbp pointer to the @p USBDriver object + * + * @notapi + */ +void usb_lld_reset(USBDriver *usbp) { + uint32_t cntr; + + /* Powers up the transceiver while holding the USB in reset state.*/ + STM32_USB->CNTR = CNTR_FRES; + + /* Releases the USB reset, BTABLE is reset to zero.*/ + STM32_USB->CNTR = 0; + STM32_USB->ISTR = 0; + STM32_USB->DADDR = DADDR_EF; + cntr = /*CNTR_ESOFM | */ CNTR_RESETM | /*CNTR_SUSPM |*/ + /*CNTR_WKUPM | CNTR_ERRM | CNTR_PMAOVRM |*/ CNTR_CTRM; + /* The SOF interrupt is only enabled if a callback is defined for + this service because it is an high rate source.*/ + if (usbp->usb_config->uc_sof_cb != NULL) + cntr |= CNTR_SOFM; + STM32_USB->CNTR = cntr; +} + +/** + * @brief Sets the USB address. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] addr the USB address + * + * @notapi + */ +void usb_lld_set_address(USBDriver *usbp, uint8_t addr) { + + STM32_USB->DADDR = (uint32_t)addr | DADDR_EF; +} + +/** + * @brief Enables an endpoint. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * @param[in] epcp the endpoint configuration + * + * @notapi + */ +void usb_lld_enable_endpoint(USBDriver *usbp, usbep_t ep, + const USBEndpointConfig *epcp) { + uint16_t nblocks; + stm32_usb_descriptor_t *dp; + + /* EPxR register setup.*/ + EPR_SET(ep, epcp->uepc_epr | ep); + EPR_TOGGLE(ep, epcp->uepc_epr); + + /* Endpoint size and address initialization.*/ + if (epcp->uepc_out_maxsize > 62) + nblocks = (((((epcp->uepc_out_maxsize - 1) | 0x1f) + 1) / 32) << 10) | 0x8000; + else + nblocks = ((((epcp->uepc_out_maxsize - 1) | 1) + 1) / 2) << 10; + dp = USB_GET_DESCRIPTOR(ep); + dp->TXCOUNT = 0; + dp->RXCOUNT = nblocks; + dp->TXADDR = epcp->uepc_inaddr; + dp->RXADDR = epcp->uepc_outaddr; + + /* Logically enabling the endpoint in the USBDriver structure.*/ + usbp->usb_epc[ep] = epcp; +} + +/** + * @brief Disables all the active endpoints except the endpoint zero. + * + * @param[in] usbp pointer to the @p USBDriver object + * + * @notapi + */ +void usb_lld_disable_endpoints(USBDriver *usbp) { + unsigned i; + + for (i = 1; i <= USB_ENDOPOINTS_NUMBER; i++) { + EPR_TOGGLE(i, 0); + EPR_SET(i, 0); + } + +} + +/** + * @brief Returns the number of bytes readable from the receive packet + * buffer. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * @return The number of bytes that are effectively available. + * @retval 0 Data not yet available. + * + * @notapi + */ +size_t usb_lld_get_readable(USBDriver *usbp, usbep_t ep) { + + if ((STM32_USB->EPR[ep] & EPR_STAT_RX_MASK) != EPR_STAT_RX_NAK) + return 0; + return (size_t)(USB_GET_DESCRIPTOR(ep)->RXCOUNT & RXCOUNT_COUNT_MASK); +} + +/** + * @brief Endpoint read. + * @details The buffered packet is copied into the user buffer and then + * the endpoint is brought to the valid state in order to allow + * reception of more data. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * @param[out] buf buffer where to copy the endpoint data + * @param[in] n maximum number of bytes to copy + * @return The number of bytes that were effectively available. + * @retval 0 Data not yet available. + * + * @notapi + */ +size_t usb_lld_read(USBDriver *usbp, usbep_t ep, uint8_t *buf, size_t n) { + uint32_t *pmap; + stm32_usb_descriptor_t *udp; + size_t count; + + if ((STM32_USB->EPR[ep] & EPR_STAT_RX_MASK) != EPR_STAT_RX_NAK) + return 0; + + udp = USB_GET_DESCRIPTOR(ep); + pmap = USB_ADDR2PTR(udp->RXADDR); + count = udp->RXCOUNT & RXCOUNT_COUNT_MASK; + if (n > count) + n = count; + count = (n + 1) / 2; + while (count) { + *(uint16_t *)buf = (uint16_t)*pmap++; + buf += 2; + count--; + } + EPR_SET_STAT_RX(ep, EPR_STAT_RX_VALID); + return n; +} +/** + * @brief Returns the number of bytes writeable to the transmit packet + * buffer. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * @return The number of bytes that can be written. + * @retval 0 Endpoint not ready for transmission. + * + * @iclass + */ +size_t usb_lld_get_writeable(USBDriver *usbp, usbep_t ep) { + + if ((STM32_USB->EPR[ep] & EPR_STAT_TX_MASK) != EPR_STAT_TX_NAK) + return 0; + return (size_t)usbp->usb_epc[ep]->uepc_in_maxsize; +} + +/** + * @brief Endpoint write. + * @details The user data is copied in the packer memory and then + * the endpoint is brought to the valid state in order to allow + * transmission. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * @param[in] buf buffer where to copy the endpoint data + * @param[in] n maximum number of bytes to copy + * @return The number of bytes that were effectively written. + * @retval 0 Endpoint not ready for transmission. + * + * @notapi + */ +size_t usb_lld_write(USBDriver *usbp, usbep_t ep, + const uint8_t *buf, + size_t n) { + uint32_t *pmap; + stm32_usb_descriptor_t *udp; + size_t count; + + if ((STM32_USB->EPR[ep] & EPR_STAT_TX_MASK) != EPR_STAT_TX_NAK) + return 0; + + udp = USB_GET_DESCRIPTOR(ep); + pmap = USB_ADDR2PTR(udp->TXADDR); + udp->TXCOUNT = n; + count = (n + 1) / 2; + while (count) { + *pmap++ = *(uint16_t *)buf; + buf += 2; + count--; + } + EPR_SET_STAT_TX(ep, EPR_STAT_TX_VALID); + return n; +} + +/** + * @brief Returns the status of an IN endpoint. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * + * @notapi + */ +usbepstatus_t usb_lld_get_status_in(USBDriver *usbp, usbep_t ep) { + + switch (STM32_USB->EPR[ep] & EPR_STAT_TX_MASK) { + case EPR_STAT_TX_DIS: + return EP_STATUS_DISABLED; + case EPR_STAT_TX_STALL: + return EP_STATUS_STALLED; + default: + return EP_STATUS_ACTIVE; + } +} + +/** + * @brief Returns the status of an OUT endpoint. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * + * @notapi + */ +usbepstatus_t usb_lld_get_status_out(USBDriver *usbp, usbep_t ep) { + + switch (STM32_USB->EPR[ep] & EPR_STAT_RX_MASK) { + case EPR_STAT_RX_DIS: + return EP_STATUS_DISABLED; + case EPR_STAT_RX_STALL: + return EP_STATUS_STALLED; + default: + return EP_STATUS_ACTIVE; + } +} + +/** + * @brief Brings an IN endpoint in the stalled state. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * + * @notapi + */ +void usb_lld_stall_in(USBDriver *usbp, usbep_t ep) { + + EPR_SET_STAT_TX(ep, EPR_STAT_TX_STALL); +} + +/** + * @brief Brings an OUT endpoint in the stalled state. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * + * @notapi + */ +void usb_lld_stall_out(USBDriver *usbp, usbep_t ep) { + + EPR_SET_STAT_RX(ep, EPR_STAT_RX_STALL); +} + +/** + * @brief Brings an IN endpoint in the active state. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * + * @notapi + */ +void usb_lld_clear_in(USBDriver *usbp, usbep_t ep) { + + /* Makes sure to not put to NAK an endpoint that is already + transferring.*/ + if ((STM32_USB->EPR[ep] & EPR_STAT_TX_MASK) != EPR_STAT_TX_VALID) + EPR_SET_STAT_TX(ep, EPR_STAT_TX_NAK); +} + +/** + * @brief Brings an OUT endpoint in the active state. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * + * @notapi + */ +void usb_lld_clear_out(USBDriver *usbp, usbep_t ep) { + + /* Makes sure to not put to NAK an endpoint that is already + transferring.*/ + if ((STM32_USB->EPR[ep] & EPR_STAT_RX_MASK) != EPR_STAT_RX_VALID) + EPR_SET_STAT_TX(ep, EPR_STAT_RX_NAK); +} + +#endif /* HAL_USE_USB */ + +/** @} */ diff --git a/os/hal/platforms/STM32/usb_lld.h b/os/hal/platforms/STM32/usb_lld.h new file mode 100644 index 000000000..af306d8a5 --- /dev/null +++ b/os/hal/platforms/STM32/usb_lld.h @@ -0,0 +1,284 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/** + * @file STM32/usb_lld.h + * @brief STM32 USB subsystem low level driver header. + * + * @addtogroup USB + * @{ + */ + +#ifndef _USB_LLD_H_ +#define _USB_LLD_H_ + +#if HAL_USE_USB || defined(__DOXYGEN__) + +#include "stm32_usb.h" + +/*===========================================================================*/ +/* Driver constants. */ +/*===========================================================================*/ + +/** + * @brief Maximum endpoint address. + */ +#define USB_MAX_ENDPOINTS USB_ENDOPOINTS_NUMBER + +/*===========================================================================*/ +/* Driver pre-compile time settings. */ +/*===========================================================================*/ + +/** + * @brief USB1 driver enable switch. + * @details If set to @p TRUE the support for USB1 is included. + * @note The default is @p TRUE. + */ +#if !defined(STM32_USB_USE_USB1) || defined(__DOXYGEN__) +#define STM32_USB_USE_USB1 TRUE +#endif + +/** + * @brief USB1 interrupt priority level setting. + */ +#if !defined(STM32_USB_USB1_HP_IRQ_PRIORITY) || defined(__DOXYGEN__) +#define STM32_USB_USB1_HP_IRQ_PRIORITY 6 +#endif + +/** + * @brief USB1 interrupt priority level setting. + */ +#if !defined(STM32_USB_USB1_LP_IRQ_PRIORITY) || defined(__DOXYGEN__) +#define STM32_USB_USB1_LP_IRQ_PRIORITY 14 +#endif + +/*===========================================================================*/ +/* Derived constants and error checks. */ +/*===========================================================================*/ + +#if STM32_USB_USE_USB1 && !STM32_HAS_USB +#error "USB not present in the selected device" +#endif + +#if !STM32_USB_USE_USB1 +#error "USB driver activated but no USB peripheral assigned" +#endif + +#if STM32_USBCLK != 48000000 +#error "the USB driver requires a 48MHz clock" +#endif + +/*===========================================================================*/ +/* Driver data structures and types. */ +/*===========================================================================*/ + +/** + * @brief Type of an USB Endpoint configuration structure. + * @note Platform specific restrictions may apply to endpoints. + */ +typedef struct { + /** + * @brief IN endpoint notification callback. + */ + usbepcallback_t uepc_in_cb; + /** + * @brief OUT endpoint notification callback. + */ + usbepcallback_t uepc_out_cb; + /** + * @brief IN endpoint maximum packet size. + */ + uint16_t uepc_in_maxsize; + /** + * @brief OUT endpoint maximum packet size. + */ + uint16_t uepc_out_maxsize; + /* End of the mandatory fields.*/ + /** + * @brief EPxR register initialization value. + * @note Do not specify the EA field, leave it to zero. + */ + uint16_t uepc_epr; + /** + * @brief Endpoint IN buffer address as offset in the PMA. + */ + uint16_t uepc_inaddr; + /** + * @brief Endpoint OUT buffer address as offset in the PMA. + */ + uint16_t uepc_outaddr; +} USBEndpointConfig; + +/** + * @brief Type of an USB driver configuration structure. + */ +typedef struct { + /** + * @brief USB events callback. + * @details This callback is invoked when an USB driver event is registered. + */ + usbeventcb_t uc_event_cb; + /** + * @brief Device GET_DESCRIPTOR request callback. + * @note This callback is mandatory and cannot be set to @p NULL. + */ + usbgetdescriptor_t uc_get_descriptor_cb; + /** + * @brief Requests hook callback. + * @details This hook allows to be notified of standard requests or to + * handle non standard requests. + */ + usbreqhandler_t uc_requests_hook_cb; + /** + * @brief Start Of Frame callback. + */ + usbcallback_t uc_sof_cb; + /* End of the mandatory fields.*/ +} USBConfig; + +/** + * @brief Structure representing an USB driver. + */ +struct USBDriver { + /** + * @brief Driver state. + */ + usbstate_t usb_state; + /** + * @brief Current configuration data. + */ + const USBConfig *usb_config; + /** + * @brief Field available to user, it can be used to associate an + * application-defined handler to the USB driver. + */ + void *usb_param; + /** + * @brief Active endpoints configurations. + */ + const USBEndpointConfig *usb_epc[USB_MAX_ENDPOINTS + 1]; + /** + * @brief Endpoint 0 state. + */ + usbep0state_t usb_ep0state; + /** + * @brief Next position in the buffer to be transferred through endpoint 0. + */ + uint8_t *usb_ep0next; + /** + * @brief Maximum number of bytes to be tranferred through endpoint 0. + */ + size_t usb_ep0max; + /** + * @brief Number of bytes yet to be tranferred through endpoint 0. + */ + size_t usb_ep0n; + /** + * @brief Size of the last packet transferred through endpoint 0. + */ + size_t usb_ep0lastsize; + /** + * @brief Endpoint 0 end transaction callback. + */ + usbcallback_t usb_ep0endcb; + /** + * @brief Setup packet buffer. + */ + uint8_t usb_setup[8]; + /** + * @brief Current USB device status. + */ + uint16_t usb_status; + /** + * @brief Assigned USB address. + */ + uint8_t usb_address; + /** + * @brief Current USB device configuration. + */ + uint8_t usb_configuration; + /* End of the mandatory fields.*/ +}; + +/*===========================================================================*/ +/* Driver macros. */ +/*===========================================================================*/ + +/** + * @brief Fetches a 16 bits word value from an USB message. + * + * @param[in] p pointer to the 16 bits word + * + * @notapi + */ +#define usb_lld_fetch_word(p) (*(uint16_t *)p) + +/** + * @brief Returns the current frame number. + * + * @param[in] usbp pointer to the @p USBDriver object + * @return The current frame number. + * + * @notapi + */ +#define usb_lld_get_frame_number(usbp) (STM32_USB->FNR & FNR_FN_MASK) + +/*===========================================================================*/ +/* External declarations. */ +/*===========================================================================*/ + +#if STM32_USB_USE_USB1 && !defined(__DOXYGEN__) +extern USBDriver USBD1; +#endif + +#if !defined(__DOXYGEN__) +extern const USBEndpointConfig usb_lld_ep0config; +#endif + +#ifdef __cplusplus +extern "C" { +#endif + void usb_lld_init(void); + void usb_lld_start(USBDriver *usbp); + void usb_lld_stop(USBDriver *usbp); + void usb_lld_reset(USBDriver *usbp); + void usb_lld_set_address(USBDriver *usbp, uint8_t addr); + void usb_lld_enable_endpoint(USBDriver *usbp, usbep_t ep, + const USBEndpointConfig *epcp); + void usb_lld_disable_endpoints(USBDriver *usbp); + size_t usb_lld_get_readable(USBDriver *usbp, usbep_t ep); + size_t usb_lld_read(USBDriver *usbp, usbep_t ep, + uint8_t *buf, size_t n); + size_t usb_lld_write(USBDriver *usbp, usbep_t ep, + const uint8_t *buf, size_t n); + usbepstatus_t usb_lld_get_status_in(USBDriver *usbp, usbep_t ep); + usbepstatus_t usb_lld_get_status_out(USBDriver *usbp, usbep_t ep); + void usb_lld_stall_in(USBDriver *usbp, usbep_t ep); + void usb_lld_stall_out(USBDriver *usbp, usbep_t ep); + void usb_lld_clear_in(USBDriver *usbp, usbep_t ep); + void usb_lld_clear_out(USBDriver *usbp, usbep_t ep); +#ifdef __cplusplus +} +#endif + +#endif /* HAL_USE_USB */ + +#endif /* _USB_LLD_H_ */ + +/** @} */ diff --git a/os/hal/src/hal.c b/os/hal/src/hal.c index 0913ad7a4..bfbaa3e84 100644 --- a/os/hal/src/hal.c +++ b/os/hal/src/hal.c @@ -81,11 +81,17 @@ void halInit(void) { #if HAL_USE_SPI || defined(__DOXYGEN__) spiInit(); #endif +#if HAL_USE_UART || defined(__DOXYGEN__) + uartInit(); +#endif +#if HAL_USE_USB || defined(__DOXYGEN__) + usbInit(); +#endif #if HAL_USE_MMC_SPI || defined(__DOXYGEN__) mmcInit(); #endif -#if HAL_USE_UART || defined(__DOXYGEN__) - uartInit(); +#if HAL_USE_SERIAL_USB || defined(__DOXYGEN__) + sduInit(); #endif /* Board specific initialization.*/ boardInit(); diff --git a/os/hal/src/serial_usb.c b/os/hal/src/serial_usb.c new file mode 100644 index 000000000..62a901162 --- /dev/null +++ b/os/hal/src/serial_usb.c @@ -0,0 +1,328 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/** + * @file serial_usb.c + * @brief Serial over USB Driver code. + * + * @addtogroup SERIAL_USB + * @{ + */ + +#include "ch.h" +#include "hal.h" + +#include "usb_cdc.h" + +#if HAL_USE_SERIAL_USB || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver exported variables. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver local variables. */ +/*===========================================================================*/ + +/* + * Current Line Coding. + */ +static cdc_linecoding_t linecoding = { + {0x00, 0x96, 0x00, 0x00}, /* 38400. */ + LC_STOP_1, LC_PARITY_NONE, 8 +}; + +/*===========================================================================*/ +/* Driver local functions. */ +/*===========================================================================*/ + +/* + * Interface implementation. + */ + +static size_t writes(void *ip, const uint8_t *bp, size_t n) { + + return chOQWriteTimeout(&((SerialDriver *)ip)->oqueue, bp, + n, TIME_INFINITE); +} + +static size_t reads(void *ip, uint8_t *bp, size_t n) { + + return chIQReadTimeout(&((SerialDriver *)ip)->iqueue, bp, + n, TIME_INFINITE); +} + +static bool_t putwouldblock(void *ip) { + + return chOQIsFullI(&((SerialDriver *)ip)->oqueue); +} + +static bool_t getwouldblock(void *ip) { + + return chIQIsEmptyI(&((SerialDriver *)ip)->iqueue); +} + +static msg_t putt(void *ip, uint8_t b, systime_t timeout) { + + return chOQPutTimeout(&((SerialDriver *)ip)->oqueue, b, timeout); +} + +static msg_t gett(void *ip, systime_t timeout) { + + return chIQGetTimeout(&((SerialDriver *)ip)->iqueue, timeout); +} + +static size_t writet(void *ip, const uint8_t *bp, size_t n, systime_t time) { + + return chOQWriteTimeout(&((SerialDriver *)ip)->oqueue, bp, n, time); +} + +static size_t readt(void *ip, uint8_t *bp, size_t n, systime_t time) { + + return chIQReadTimeout(&((SerialDriver *)ip)->iqueue, bp, n, time); +} + +static ioflags_t getflags(void *ip) { + _ch_get_and_clear_flags_impl(ip); +} + +static const struct SerialUSBDriverVMT vmt = { + writes, reads, putwouldblock, getwouldblock, + putt, gett, writet, readt, + getflags +}; + +/** + * @brief Notification of data removed from the input queue. + */ +static void inotify(GenericQueue *qp) { + SerialUSBDriver *sdup = (SerialUSBDriver *)qp->q_wrptr; + size_t n; + + /* Writes to the input queue can only happen when the queue has been + emptied, then a whole packet is loaded in the queue.*/ + if (chIQIsEmptyI(&sdup->iqueue)) { + + n = usbReadI(sdup->config->usbp, sdup->config->data_available_ep, + sdup->iqueue.q_buffer, SERIAL_USB_BUFFERS_SIZE); + if (n > 0) { + sdup->iqueue.q_rdptr = sdup->iqueue.q_buffer; + chSemSetCounterI(&sdup->iqueue.q_sem, n); + } + } +} + +/** + * @brief Notification of data inserted into the output queue. + */ +static void onotify(GenericQueue *qp) { + SerialUSBDriver *sdup = (SerialUSBDriver *)qp->q_rdptr; + size_t n; + + /* If there is any data in the output queue then it is sent within a + single packet and the queue is emptied.*/ + n = usbWriteI(sdup->config->usbp, sdup->config->data_request_ep, + sdup->oqueue.q_buffer, chOQGetFullI(&sdup->oqueue)); + if (n > 0) { + sdup->oqueue.q_wrptr = sdup->oqueue.q_buffer; + chSemSetCounterI(&sdup->oqueue.q_sem, SERIAL_USB_BUFFERS_SIZE); + } +} + +/*===========================================================================*/ +/* Driver exported functions. */ +/*===========================================================================*/ + +/** + * @brief Serial Driver initialization. + * @note This function is implicitly invoked by @p halInit(), there is + * no need to explicitly initialize the driver. + * + * @init + */ +void sduInit(void) { +} + +/** + * @brief Initializes a generic full duplex driver object. + * @details The HW dependent part of the initialization has to be performed + * outside, usually in the hardware initialization code. + * + * @param[out] sdup pointer to a @p SerialUSBDriver structure + * @param[in] inotify pointer to a callback function that is invoked when + * some data is read from the Queue. The value can be + * @p NULL. + * @param[in] onotify pointer to a callback function that is invoked when + * some data is written in the Queue. The value can be + * @p NULL. + * + * @init + */ +void sduObjectInit(SerialUSBDriver *sdup) { + + sdup->vmt = &vmt; + chEvtInit(&sdup->event); + sdup->flags = IO_NO_ERROR; + sdup->state = SDU_STOP; + chIQInit(&sdup->iqueue, sdup->ib, SERIAL_USB_BUFFERS_SIZE, inotify); + chOQInit(&sdup->oqueue, sdup->ob, SERIAL_USB_BUFFERS_SIZE, onotify); + /* This is a dirty trick but those pointers are never used because queues + are accessed in block mode from the low level.*/ + sdup->iqueue.q_wrptr = (uint8_t *)sdup; + sdup->oqueue.q_rdptr = (uint8_t *)sdup; +} + +/** + * @brief Configures and starts the driver. + * + * @param[in] sdup pointer to a @p SerialUSBDriver object + * @param[in] config the serial over USB driver configuration + * + * @api + */ +void sduStart(SerialUSBDriver *sdup, const SerialUSBConfig *config) { + + chDbgCheck(sdup != NULL, "sduStart"); + + chSysLock(); + chDbgAssert((sdup->state == SDU_STOP) || (sdup->state == SDU_READY), + "sduStart(), #1", + "invalid state"); + sdup->config = config; + usbStart(config->usbp, &config->usb_config); + config->usbp->usb_param = sdup; + sdup->state = SDU_READY; + chSysUnlock(); +} + +/** + * @brief Stops the driver. + * @details Any thread waiting on the driver's queues will be awakened with + * the message @p Q_RESET. + * + * @param[in] sdup pointer to a @p SerialUSBDriver object + * + * @api + */ +void sduStop(SerialUSBDriver *sdup) { + + chDbgCheck(sdup != NULL, "sdStop"); + + chSysLock(); + chDbgAssert((sdup->state == SDU_STOP) || (sdup->state == SDU_READY), + "sduStop(), #1", + "invalid state"); + usbStop(sdup->config->usbp); + sdup->state = SDU_STOP; + chSysUnlock(); +} + +/** + * @brief Default requests hook. + * @details Applications wanting to use the Serial over USB driver can use + * this function as requests hook in the USB configuration. + * The following requests are emulated: + * - CDC_GET_LINE_CODING. + * - CDC_SET_LINE_CODING. + * - CDC_SET_CONTROL_LINE_STATE. + * . + */ +bool_t sduRequestsHook(USBDriver *usbp) { + + if ((usbp->usb_setup[0] & USB_RTYPE_TYPE_MASK) == USB_RTYPE_TYPE_CLASS) { + switch (usbp->usb_setup[1]) { + case CDC_GET_LINE_CODING: + usbSetupTransfer(usbp, (uint8_t *)&linecoding, sizeof(linecoding), NULL); + return TRUE; + case CDC_SET_LINE_CODING: + usbSetupTransfer(usbp, (uint8_t *)&linecoding, sizeof(linecoding), NULL); + return TRUE; + case CDC_SET_CONTROL_LINE_STATE: + /* Nothing to do, there are no control lines.*/ + usbSetupTransfer(usbp, NULL, 0, NULL); + return TRUE; + default: + return FALSE; + } + } + return FALSE; +} + +/** + * @brief Default data request callback. + * @details The application must use this function as callback for the IN + * data endpoint. + */ +void sduDataRequest(USBDriver *usbp, usbep_t ep) { + SerialUSBDriver *sdup = usbp->usb_param; + size_t n; + + chSysLockFromIsr(); + /* If there is any data in the output queue then it is sent within a + single packet and the queue is emptied.*/ + n = chOQGetFullI(&sdup->oqueue); + if (n > 0) { + n = usbWriteI(usbp, ep, sdup->oqueue.q_buffer, n); + if (n > 0) { + sdup->oqueue.q_wrptr = sdup->oqueue.q_buffer; + chSemSetCounterI(&sdup->oqueue.q_sem, SERIAL_USB_BUFFERS_SIZE); + chIOAddFlagsI(sdup, IO_OUTPUT_EMPTY); + } + } + chSysUnlockFromIsr(); +} + +/** + * @brief Default data available callback. + * @details The application must use this function as callback for the OUT + * data endpoint. + */ +void sduDataAvailable(USBDriver *usbp, usbep_t ep) { + SerialUSBDriver *sdup = usbp->usb_param; + + chSysLockFromIsr(); + /* Writes to the input queue can only happen when the queue has been + emptied, then a whole packet is loaded in the queue.*/ + if (chIQIsEmptyI(&sdup->iqueue)) { + size_t n; + + n = usbReadI(usbp, ep, sdup->iqueue.q_buffer, SERIAL_USB_BUFFERS_SIZE); + if (n > 0) { + sdup->iqueue.q_rdptr = sdup->iqueue.q_buffer; + chSemSetCounterI(&sdup->iqueue.q_sem, n); + chIOAddFlagsI(sdup, IO_INPUT_AVAILABLE); + } + } + chSysUnlockFromIsr(); +} + +/** + * @brief Default data received callback. + * @details The application must use this function as callback for the IN + * interrupt endpoint. + */ +void sduInterruptRequest(USBDriver *usbp, usbep_t ep) { + + (void)usbp; + (void)ep; +} + +#endif /* HAL_USE_SERIAL */ + +/** @} */ diff --git a/os/hal/src/usb.c b/os/hal/src/usb.c new file mode 100644 index 000000000..c89d5a8e9 --- /dev/null +++ b/os/hal/src/usb.c @@ -0,0 +1,541 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/** + * @file usb.c + * @brief USB Driver code. + * + * @addtogroup USB + * @{ + */ + +#include "ch.h" +#include "hal.h" +#include "usb.h" + +#if HAL_USE_USB || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver exported variables. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver local variables. */ +/*===========================================================================*/ + +static const uint8_t zero_status[] = {0x00, 0x00}; +static const uint8_t active_status[] ={0x00, 0x00}; +static const uint8_t halted_status[] = {0x01, 0x00}; + +/*===========================================================================*/ +/* Driver local functions. */ +/*===========================================================================*/ + +/** + * @brief SET ADDRESS transaction callback. + * + * @param[in] usbp pointer to the @p USBDriver object + */ +void set_address(USBDriver *usbp) { + + usbp->usb_address = usbp->usb_setup[2]; + usb_lld_set_address(usbp, usbp->usb_address); + if (usbp->usb_config->uc_event_cb) + usbp->usb_config->uc_event_cb(usbp, USB_EVENT_ADDRESS); + usbp->usb_state = USB_SELECTED; +} + +/** + * @brief Starts a receive phase on the endpoint zero. + * + * @param[in] usbp pointer to the @p USBDriver object + */ +static void start_rx_ep0(USBDriver *usbp) { + + if (usbp->usb_ep0n > 0) { + /* The received data cannot exceed the available amount.*/ + if (usbp->usb_ep0n > usbp->usb_ep0max) + usbp->usb_ep0n = usbp->usb_ep0max; + + /* Determines the maximum amount that can be received using a + single packet.*/ + if (usbp->usb_ep0n > usb_lld_ep0config.uepc_out_maxsize) + usbp->usb_ep0lastsize = usb_lld_ep0config.uepc_out_maxsize; + else + usbp->usb_ep0lastsize = usbp->usb_ep0n; + usbp->usb_ep0state = USB_EP0_RX; + } + else { + /* Sending zero sized status packet.*/ + usb_lld_write(usbp, 0, NULL, 0); + usbp->usb_ep0state = USB_EP0_SENDING_STS; + } +} + +/** + * @brief Starts a transmission phase on the endpoint zero. + * + * @param[in] usbp pointer to the @p USBDriver object + */ +static void start_tx_ep0(USBDriver *usbp) { + + if (usbp->usb_ep0n > 0) { + /* The transmitted data cannot exceed the requested amount.*/ + if (usbp->usb_ep0n > usbp->usb_ep0max) + usbp->usb_ep0n = usbp->usb_ep0max; + + /* Determines the maximum amount that can be transmitted using a + single packet.*/ + if (usbp->usb_ep0n > usb_lld_ep0config.uepc_in_maxsize) + usbp->usb_ep0lastsize = usb_lld_ep0config.uepc_in_maxsize; + else + usbp->usb_ep0lastsize = usbp->usb_ep0n; + + /* Starts transmission.*/ + usb_lld_write(usbp, 0, usbp->usb_ep0next, usbp->usb_ep0lastsize); + usbp->usb_ep0state = USB_EP0_TX; + } + else + usbp->usb_ep0state = USB_EP0_WAITING_STS; +} + +/** + * @brief Standard requests handler. + * @details This is the standard requests default handler, most standard + * requests are handled here, the user can override the standard + * handling using the @p uc_requests_hook_cb hook in the + * @p USBConfig structure. + * + * @param[in] usbp pointer to the @p USBDriver object + * @return The request handling exit code. + * @retval FALSE Request not recognized by the handler or error. + * @retval TRUE Request handled. + */ +static bool_t default_handler(USBDriver *usbp) { + const USBDescriptor *dp; + + /* Decoding the request.*/ + switch (((usbp->usb_setup[0] & (USB_RTYPE_RECIPIENT_MASK | + USB_RTYPE_TYPE_MASK)) | + (usbp->usb_setup[1] << 8))) { + case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_GET_STATUS << 8): + /* Just returns the current status word.*/ + usbSetupTransfer(usbp, (uint8_t *)&usbp->usb_status, 2, NULL); + return TRUE; + case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_CLEAR_FEATURE << 8): + /* Only the DEVICE_REMOTE_WAKEUP is handled here, any other feature + number is handled as an error.*/ + if (usbp->usb_setup[2] == USB_FEATURE_DEVICE_REMOTE_WAKEUP) { + usbp->usb_status &= ~2; + usbSetupTransfer(usbp, NULL, 0, NULL); + return TRUE; + } + return FALSE; + case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_SET_FEATURE << 8): + /* Only the DEVICE_REMOTE_WAKEUP is handled here, any other feature + number is handled as an error.*/ + if (usbp->usb_setup[2] == USB_FEATURE_DEVICE_REMOTE_WAKEUP) { + usbp->usb_status |= 2; + usbSetupTransfer(usbp, NULL, 0, NULL); + return TRUE; + } + return FALSE; + case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_SET_ADDRESS << 8): + /* The handling is posponed to after the status phase in order to allow + the proper completion of the transaction.*/ + usbSetupTransfer(usbp, NULL, 0, set_address); + return TRUE; + case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_GET_DESCRIPTOR << 8): + /* Handling descriptor requests from the host.*/ + dp = usbp->usb_config->uc_get_descriptor_cb( + usbp, usbp->usb_setup[3], usbp->usb_setup[2], + usb_lld_fetch_word(&usbp->usb_setup[4])); + if (dp == NULL) + return FALSE; + usbSetupTransfer(usbp, (uint8_t *)dp->ud_string, dp->ud_size, NULL); + return TRUE; + case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_GET_CONFIGURATION << 8): + /* Returning the last selected configuration.*/ + usbSetupTransfer(usbp, &usbp->usb_configuration, 1, NULL); + return TRUE; + case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_SET_CONFIGURATION << 8): + /* Handling configuration selection from the host.*/ + usbp->usb_configuration = usbp->usb_setup[2]; + if (usbp->usb_configuration == 0) + usbp->usb_state = USB_SELECTED; + else + usbp->usb_state = USB_ACTIVE; + if (usbp->usb_config->uc_event_cb) + usbp->usb_config->uc_event_cb(usbp, USB_EVENT_CONFIGURED); + usbSetupTransfer(usbp, NULL, 0, NULL); + return TRUE; + case USB_RTYPE_RECIPIENT_INTERFACE | (USB_REQ_GET_STATUS << 8): + case USB_RTYPE_RECIPIENT_ENDPOINT | (USB_REQ_SYNCH_FRAME << 8): + /* Just sending two zero bytes, the application can change the behavior + using a hook..*/ + usbSetupTransfer(usbp, (uint8_t *)zero_status, 2, NULL); + return TRUE; + case USB_RTYPE_RECIPIENT_ENDPOINT | (USB_REQ_GET_STATUS << 8): + /* Sending the EP status.*/ + if (usbp->usb_setup[4] & 0x80) { + switch (usb_lld_get_status_in(usbp, usbp->usb_setup[4] & 0x0F)) { + case EP_STATUS_STALLED: + usbSetupTransfer(usbp, (uint8_t *)halted_status, 2, NULL); + return TRUE; + case EP_STATUS_ACTIVE: + usbSetupTransfer(usbp, (uint8_t *)active_status, 2, NULL); + return TRUE; + default: + return FALSE; + } + } + else { + switch (usb_lld_get_status_out(usbp, usbp->usb_setup[4] & 0x0F)) { + case EP_STATUS_STALLED: + usbSetupTransfer(usbp, (uint8_t *)halted_status, 2, NULL); + return TRUE; + case EP_STATUS_ACTIVE: + usbSetupTransfer(usbp, (uint8_t *)active_status, 2, NULL); + return TRUE; + default: + return FALSE; + } + } + case USB_RTYPE_RECIPIENT_ENDPOINT | (USB_REQ_CLEAR_FEATURE << 8): + /* Only ENDPOINT_HALT is handled as feature.*/ + if (usbp->usb_setup[2] != USB_FEATURE_ENDPOINT_HALT) + return FALSE; + /* Clearing the EP status, not valid for EP0, it is ignored in that case.*/ + if ((usbp->usb_setup[4] & 0x0F) > 0) { + if (usbp->usb_setup[4] & 0x80) + usb_lld_clear_in(usbp, usbp->usb_setup[4] & 0x0F); + else + usb_lld_clear_out(usbp, usbp->usb_setup[4] & 0x0F); + } + usbSetupTransfer(usbp, NULL, 0, NULL); + return TRUE; + case USB_RTYPE_RECIPIENT_ENDPOINT | (USB_REQ_SET_FEATURE << 8): + /* Only ENDPOINT_HALT is handled as feature.*/ + if (usbp->usb_setup[2] != USB_FEATURE_ENDPOINT_HALT) + return FALSE; + /* Stalling the EP, not valid for EP0, it is ignored in that case.*/ + if ((usbp->usb_setup[4] & 0x0F) > 0) { + if (usbp->usb_setup[4] & 0x80) + usb_lld_stall_in(usbp, usbp->usb_setup[4] & 0x0F); + else + usb_lld_stall_out(usbp, usbp->usb_setup[4] & 0x0F); + } + usbSetupTransfer(usbp, NULL, 0, NULL); + return TRUE; + case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_SET_DESCRIPTOR << 8): + case USB_RTYPE_RECIPIENT_INTERFACE | (USB_REQ_CLEAR_FEATURE << 8): + case USB_RTYPE_RECIPIENT_INTERFACE | (USB_REQ_SET_FEATURE << 8): + case USB_RTYPE_RECIPIENT_INTERFACE | (USB_REQ_GET_INTERFACE << 8): + case USB_RTYPE_RECIPIENT_INTERFACE | (USB_REQ_SET_INTERFACE << 8): + /* All the above requests are not handled here, if you need them then + use the hook mechanism and provide handling.*/ + default: + return FALSE; + } +} + +/*===========================================================================*/ +/* Driver exported functions. */ +/*===========================================================================*/ + +/** + * @brief USB Driver initialization. + * @note This function is implicitly invoked by @p halInit(), there is + * no need to explicitly initialize the driver. + * + * @init + */ +void usbInit(void) { + + usb_lld_init(); +} + +/** + * @brief Initializes the standard part of a @p USBDriver structure. + * + * @param[out] usbp pointer to the @p USBDriver object + * + * @init + */ +void usbObjectInit(USBDriver *usbp) { + + usbp->usb_state = USB_STOP; + usbp->usb_config = NULL; + usbp->usb_param = NULL; +} + +/** + * @brief Configures and activates the USB peripheral. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] config pointer to the @p USBConfig object + * + * @api + */ +void usbStart(USBDriver *usbp, const USBConfig *config) { + + chDbgCheck((usbp != NULL) && (config != NULL), "usbStart"); + + chSysLock(); + chDbgAssert((usbp->usb_state == USB_STOP) || (usbp->usb_state == USB_READY), + "usbStart(), #1", + "invalid state"); + usbp->usb_config = config; + usb_lld_start(usbp); + usbp->usb_state = USB_READY; + chSysUnlock(); +} + +/** + * @brief Deactivates the USB peripheral. + * + * @param[in] usbp pointer to the @p USBDriver object + * + * @api + */ +void usbStop(USBDriver *usbp) { + + chDbgCheck(usbp != NULL, "usbStop"); + + chSysLock(); + chDbgAssert((usbp->usb_state == USB_STOP) || (usbp->usb_state == USB_READY), + "usbStop(), #1", + "invalid state"); + usb_lld_stop(usbp); + usbp->usb_state = USB_STOP; + chSysUnlock(); +} + +/** + * @brief Enables an endpoint. + * @details This function enables an endpoint, both IN and/or OUT directions + * depending on the configuration structure. + * @note This function must be invoked in response of a SET_CONFIGURATION + * or SET_INTERFACE message. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number + * @param[in] epcp the endpoint configuration + * + * @iclass + */ +void usbEnableEndpointI(USBDriver *usbp, usbep_t ep, + const USBEndpointConfig *epcp) { + + chDbgAssert(usbp->usb_state == USB_ACTIVE, + "usbEnableEndpointI(), #1", "invalid state"); + chDbgAssert(usbp->usb_epc[ep] != NULL, + "usbEnableEndpointI(), #2", "already enabled"); + + /* Logically enabling the endpoint in the USBDriver structure.*/ + usbp->usb_epc[ep] = epcp; + + /* Low level endpoint activation.*/ + usb_lld_enable_endpoint(usbp, ep, epcp); +} + +/** + * @brief Disables all the active endpoints. + * @details This function disables all the active endpoints except the + * endpoint zero. + * @note This function must be invoked in response of a SET_CONFIGURATION + * message with configuration number zero. + * + * @param[in] usbp pointer to the @p USBDriver object + * + * @iclass + */ +void usbDisableEndpointsI(USBDriver *usbp) { + unsigned i; + + chDbgAssert(usbp->usb_state == USB_SELECTED, + "usbDisableEndpointsI(), #1", "invalid state"); + + for (i = 1; i <= USB_MAX_ENDPOINTS; i++) + usbp->usb_epc[i] = NULL; + + /* Low level endpoints deactivation.*/ + usb_lld_disable_endpoints(usbp); +} + +/** + * @brief USB reset routine. + * + * @param[in] usbp pointer to the @p USBDriver object + * + * @notapi + */ +void _usb_reset(USBDriver *usbp) { + unsigned i; + + usbp->usb_state = USB_READY; + usbp->usb_status = 0; + usbp->usb_address = 0; + usbp->usb_configuration = 0; + + /* Invalidates all endpoints into the USBDriver structure.*/ + for (i = 0; i <= USB_MAX_ENDPOINTS; i++) + usbp->usb_epc[i] = NULL; + + /* EP0 state machine initialization.*/ + usbp->usb_ep0state = USB_EP0_WAITING_SETUP; + + /* Low level reset.*/ + usb_lld_reset(usbp); + + /* Low level endpoint zero activation.*/ + usbp->usb_epc[0] = &usb_lld_ep0config; + usb_lld_enable_endpoint(usbp, 0, &usb_lld_ep0config); +} + +/** + * @brief Default EP0 IN callback. + * @details This function is used by the low level driver as default handler + * for EP0 IN events. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number, always zero + * + * @notapi + */ +void _usb_ep0in(USBDriver *usbp, usbep_t ep) { + + (void)ep; + switch (usbp->usb_ep0state) { + case USB_EP0_TX: + usbp->usb_ep0next += usbp->usb_ep0lastsize; + usbp->usb_ep0max -= usbp->usb_ep0lastsize; + usbp->usb_ep0n -= usbp->usb_ep0lastsize; + + /* The final condition is when the requested size has been transmitted or + when a packet has been sent with size less than the maximum packet + size.*/ + if ((usbp->usb_ep0max == 0) || + (usbp->usb_ep0lastsize < usb_lld_ep0config.uepc_in_maxsize)) + usbp->usb_ep0state = USB_EP0_WAITING_STS; + else { + usbp->usb_ep0lastsize = usbp->usb_ep0n > usb_lld_ep0config.uepc_in_maxsize ? + usb_lld_ep0config.uepc_in_maxsize : usbp->usb_ep0n; + usb_lld_write(usbp, 0, usbp->usb_ep0next, usbp->usb_ep0lastsize); + } + return; + case USB_EP0_SENDING_STS: + if (usbp->usb_ep0endcb) + usbp->usb_ep0endcb(usbp); + + usbp->usb_ep0state = USB_EP0_WAITING_SETUP; + return; + default: + ; + } + /* Error response.*/ + usb_lld_stall_in(usbp, 0); + usb_lld_stall_out(usbp, 0); + if (usbp->usb_config->uc_event_cb) + usbp->usb_config->uc_event_cb(usbp, USB_EVENT_STALLED); + usbp->usb_ep0state = USB_EP0_WAITING_SETUP; +} + +/** + * @brief Default EP0 OUT callback. + * @details This function is used by the low level driver as default handler + * for EP0 OUT events. + * + * @param[in] usbp pointer to the @p USBDriver object + * @param[in] ep endpoint number, always zero + * + * @notapi + */ +void _usb_ep0out(USBDriver *usbp, usbep_t ep) { + size_t n, size; + uint8_t buf[1]; + + (void)ep; + switch (usbp->usb_ep0state) { + case USB_EP0_WAITING_SETUP: + /* SETUP packet handling.*/ + n = usb_lld_read(usbp, 0, usbp->usb_setup, 8); + if (n != 8) + break; + + /* First verify if the application has an handler installed for this + request.*/ + if (!(usbp->usb_config->uc_requests_hook_cb) || + !(usbp->usb_config->uc_requests_hook_cb(usbp))) { + /* Invoking the default handler, if this fails then stalls the + endpoint zero as error.*/ + if (((usbp->usb_setup[0] & USB_RTYPE_TYPE_MASK) != USB_RTYPE_TYPE_STD) || + !default_handler(usbp)) + break; + } + + /* Transfer preparation. The request handler must have populated + correctly the fields usb_ep0next, usb_ep0n and usb_ep0endcb using + the macro usbSetupTransfer().*/ + usbp->usb_ep0max = usb_lld_fetch_word(&usbp->usb_setup[6]); + if ((usbp->usb_setup[0] & USB_RTYPE_DIR_MASK) == USB_RTYPE_DIR_DEV2HOST) + start_tx_ep0(usbp); + else + start_rx_ep0(usbp); + return; + case USB_EP0_RX: + /* Check for buffer overflow.*/ + n = size = usb_lld_get_readable(usbp, 0); + if (n > usbp->usb_ep0n) + n = usbp->usb_ep0n; + /* Fetching received data packet.*/ + n = usb_lld_read(usbp, 0, usbp->usb_ep0next, n); + if (n > usbp->usb_ep0max) + break; + usbp->usb_ep0max -= size; + usbp->usb_ep0n -= n; + usbp->usb_ep0next += n; + if (usbp->usb_ep0max == 0) { + usb_lld_write(usbp, 0, NULL, 0); + usbp->usb_ep0state = USB_EP0_SENDING_STS; + } + return; + case USB_EP0_WAITING_STS: + /* STATUS received packet handling, it must be zero sized.*/ + n = usb_lld_read(usbp, 0, buf, 1); + if (n != 0) + break; + if (usbp->usb_ep0endcb) + usbp->usb_ep0endcb(usbp); + usbp->usb_ep0state = USB_EP0_WAITING_SETUP; + return; + default: + ; + } + /* Error response.*/ + usb_lld_stall_in(usbp, 0); + usb_lld_stall_out(usbp, 0); + if (usbp->usb_config->uc_event_cb) + usbp->usb_config->uc_event_cb(usbp, USB_EVENT_STALLED); + usbp->usb_ep0state = USB_EP0_WAITING_SETUP; +} + +#endif /* HAL_USE_USB */ + +/** @} */ diff --git a/readme.txt b/readme.txt index 1be5ae77d..db6f8a7d4 100644 --- a/readme.txt +++ b/readme.txt @@ -69,6 +69,13 @@ ***************************************************************************** *** 2.3.0 *** +- NEW: Added experimental USB driver, it will certainly change in next + releases. +- NEW: Added experimental "serial over USB" driver, it implements a + Communication Device Class exposing it as a normal serial driver to + applications, it will certainly change in next + releases. +- NEW: Added USB CDC loopback test application. - NEW: Implemented new event IO_TRANSMISSION_END in the generic serial driver. This event marks the physical transmission end of a data stream. - NEW: Implemented the new IO_TRANSMISSION_END event in the STM32 serial