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Diffstat (limited to 'arch/arm/cpu/ixp/npe/include/IxUART.h')
| -rw-r--r-- | arch/arm/cpu/ixp/npe/include/IxUART.h | 458 |
1 files changed, 458 insertions, 0 deletions
diff --git a/arch/arm/cpu/ixp/npe/include/IxUART.h b/arch/arm/cpu/ixp/npe/include/IxUART.h new file mode 100644 index 0000000000..03a44441c5 --- /dev/null +++ b/arch/arm/cpu/ixp/npe/include/IxUART.h @@ -0,0 +1,458 @@ +/** + * @file IxUART.h + * + * @date 12-OCT-01 + * + * @brief Public header for the Intel IXP400 internal UART, generic driver. + * + * Design Notes: + * This driver allows you to perform the following functions: + * Device Initialization, + * send/receive characters. + * + * Perform Uart IOCTL for the following: + * Set/Get the current baud rate, + * set parity, + * set the number of Stop bits, + * set the character Length (5,6,7,8), + * enable/disable Hardware flow control. + * + * Only Polled mode is supported for now. + * + * + * @par + * IXP400 SW Release version 2.0 + * + * -- Copyright Notice -- + * + * @par + * Copyright 2001-2005, Intel Corporation. + * All rights reserved. + * + * @par + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Intel Corporation nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * @par + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @par + * -- End of Copyright Notice -- +*/ + +/** + * @defgroup IxUARTAccAPI IXP400 UART Access (IxUARTAcc) API + * + * @brief IXP400 UARTAcc Driver Public API + * + * @{ + */ + + +/* Defaults */ + +/** + * @defgroup DefaultDefines Defines for Default Values + * + * @brief Default values which can be used for UART configuration + * + * @sa ixUARTDev + */ + +/** + * @def IX_UART_DEF_OPTS + * + * @brief The default hardware options to set the UART to - + * no flow control, 8 bit word, 1 stop bit, no parity + * + * @ingroup DefaultDefines + */ +#define IX_UART_DEF_OPTS (CLOCAL | CS8) + +/** + * @def IX_UART_DEF_XMIT + * + * @brief The default UART FIFO size - must be no bigger than 64 + * + * @ingroup DefaultDefines + */ +#define IX_UART_DEF_XMIT 64 + +/** + * @def IX_UART_DEF_BAUD + * + * @brief The default UART baud rate - 9600 + * + * @ingroup DefaultDefines + */ +#define IX_UART_DEF_BAUD 9600 + +/** + * @def IX_UART_MIN_BAUD + * + * @brief The minimum UART baud rate - 9600 + * + * @ingroup DefaultDefines + */ +#define IX_UART_MIN_BAUD 9600 + +/** + * @def IX_UART_MAX_BAUD + * + * @brief The maximum UART baud rate - 926100 + * + * @ingroup DefaultDefines + */ +#define IX_UART_MAX_BAUD 926100 + +/** + * @def IX_UART_XTAL + * + * @brief The UART clock speed + * + * @ingroup DefaultDefines + */ +#define IX_UART_XTAL 14745600 + + + +/* IOCTL commands (Request codes) */ + +/** + * @defgroup IoctlCommandDefines Defines for IOCTL Commands + * + * @brief IOCTL Commands (Request codes) which can be used + * with @ref ixUARTIoctl + */ + + +/** + * @ingroup IoctlCommandDefines + * + * @def IX_BAUD_SET + * + * @brief Set the baud rate + */ +#define IX_BAUD_SET 0 + +/** + * @ingroup IoctlCommandDefines + * + * @def IX_BAUD_GET + * + * @brief Get the baud rate + */ +#define IX_BAUD_GET 1 + +/** + * @ingroup IoctlCommandDefines + * @def IX_MODE_SET + * @brief Set the UART mode of operation + */ +#define IX_MODE_SET 2 + +/** + * @ingroup IoctlCommandDefines + * + * @def IX_MODE_GET + * + * @brief Get the current UART mode of operation + */ +#define IX_MODE_GET 3 + +/** + * @ingroup IoctlCommandDefines + * + * @def IX_OPTS_SET + * + * @brief Set the UART device options + */ +#define IX_OPTS_SET 4 + +/** + * @ingroup IoctlCommandDefines + * + * @def IX_OPTS_GET + * + * @brief Get the UART device options + */ +#define IX_OPTS_GET 5 + +/** + * @ingroup IoctlCommandDefines + * + * @def IX_STATS_GET + * + * @brief Get the UART statistics + */ +#define IX_STATS_GET 6 + + +/* POSIX style ioctl arguments */ + +/** + * @defgroup IoctlArgDefines Defines for IOCTL Arguments + * + * @brief POSIX style IOCTL arguments which can be used + * with @ref ixUARTIoctl + * + * @sa ixUARTMode + */ + + +/** + * @ingroup IoctlArgDefines + * + * @def CLOCAL + * + * @brief Software flow control + */ +#ifdef CLOCAL +#undef CLOCAL +#endif +#define CLOCAL 0x1 + +/** + * @ingroup IoctlArgDefines + * + * @def CREAD + * + * @brief Enable interrupt receiver + */ +#ifdef CREAD +#undef CREAD +#endif +#define CREAD 0x2 + +/** + * @ingroup IoctlArgDefines + * + * @def CSIZE + * + * @brief Characters size + */ +#ifdef CSIZE +#undef CSIZE +#endif +#define CSIZE 0xc + +/** + * @ingroup IoctlArgDefines + * + * @def CS5 + * + * @brief 5 bits + */ +#ifdef CS5 +#undef CS5 +#endif +#define CS5 0x0 + +/** + * @ingroup IoctlArgDefines + * + * @def CS6 + * + * @brief 6 bits + */ +#ifdef CS6 +#undef CS6 +#endif +#define CS6 0x4 + +/** + * @ingroup IoctlArgDefines + * + * @def CS7 + * + * @brief 7 bits + */ +#ifdef CS7 +#undef CS7 +#endif +#define CS7 0x8 + +/** + * @ingroup IoctlArgDefines + * + * @def CS8 + * + * @brief 8 bits + */ +#ifdef CS8 +#undef CS8 +#endif +#define CS8 0xc + +/** + * @ingroup IoctlArgDefines + * + * @def STOPB + * + * @brief Send two stop bits (else one) + */ +#define STOPB 0x20 + +/** + * @ingroup IoctlArgDefines + * + * @def PARENB + * + * @brief Parity detection enabled (else disabled) + */ +#ifdef PARENB +#undef PARENB +#endif +#define PARENB 0x40 + +/** + * @ingroup IoctlArgDefines + * + * @def PARODD + * + * @brief Odd parity (else even) + */ +#ifdef PARODD +#undef PARODD +#endif +#define PARODD 0x80 + +/** + * @enum ixUARTMode + * @brief The mode to set to UART to. + */ +typedef enum +{ + INTERRUPT=0, /**< Interrupt mode */ + POLLED, /**< Polled mode */ + LOOPBACK /**< Loopback mode */ +} ixUARTMode; + +/** + * @struct ixUARTStats + * @brief Statistics for the UART. + */ +typedef struct +{ + UINT32 rxCount; + UINT32 txCount; + UINT32 overrunErr; + UINT32 parityErr; + UINT32 framingErr; + UINT32 breakErr; +} ixUARTStats; + +/** + * @struct ixUARTDev + * @brief Device descriptor for the UART. + */ +typedef struct +{ + UINT8 *addr; /**< device base address */ + ixUARTMode mode; /**< interrupt, polled or loopback */ + int baudRate; /**< baud rate */ + int freq; /**< UART clock frequency */ + int options; /**< hardware options */ + int fifoSize; /**< FIFO xmit size */ + + ixUARTStats stats; /**< device statistics */ +} ixUARTDev; + +/** + * @ingroup IxUARTAccAPI + * + * @fn IX_STATUS ixUARTInit(ixUARTDev* pUART) + * + * @param pUART @ref ixUARTDev [in] - pointer to UART structure describing our device. + * + * @brief Initialise the UART. This puts the chip in a quiescent state. + * + * @pre The base address for the UART must contain a valid value. + * Also the baud rate and hardware options must contain sensible values + * otherwise the defaults will be used as defined in ixUART.h + * + * @post UART is initialized and ready to send and receive data. + * + * @note This function should only be called once per device. + * + * @retval IX_SUCCESS - UART device successfully initialised. + * @retval IX_FAIL - Critical error, device not initialised. + ***************************************************************************/ +PUBLIC IX_STATUS ixUARTInit(ixUARTDev* pUART); + +/** + * @ingroup IxUARTAccAPI + * + * @fn IX_STATUS ixUARTPollOutput(ixUARTDev* pUART, int outChar) + * + * @param pUART @ref ixUARTDev [out] - pointer to UART structure describing our device. + * @param outChar int [out] - character to transmit. + * + * @brief Transmit a character in polled mode. + * + * @pre UART device must be initialised. + * + * @retval IX_SUCCESS - character was successfully transmitted. + * @retval IX_FAIL - output buffer is full (try again). + ***************************************************************************/ +PUBLIC IX_STATUS ixUARTPollOutput(ixUARTDev* pUART, int outChar); + +/** + * @ingroup IxUARTAccAPI + * + * @fn IX_STATUS ixUARTPollInput(ixUARTDev* pUART, char *inChar) + * + * @param pUART @ref ixUARTDev [in] - pointer to UART structure describing our device. + * @param *inChar char [in] - character read from the device. + * + * @brief Receive a character in polled mode. + * + * @pre UART device must be initialised. + * + * @retval IX_SUCCESS - character was successfully read. + * @retval IX_FAIL - input buffer empty (try again). + ***************************************************************************/ +PUBLIC IX_STATUS ixUARTPollInput(ixUARTDev* pUART, char *inChar); + +/** + * @ingroup IxUARTAccAPI + * + * @fn IX_STATUS ixUARTIoctl(ixUARTDev* pUART, int cmd, void* arg) + * + * @param pUART @ref ixUARTDev [in] - pointer to UART structure describing our device. + * @param cmd int [in] - an ioctl request code. + * @param arg void* [in] - optional argument used to set the device mode, + * baud rate, and hardware options. + * + * @brief Perform I/O control routines on the device. + * + * @retval IX_SUCCESS - requested feature was set/read successfully. + * @retval IX_FAIL - error setting/reading the requested feature. + * + * @sa IoctlCommandDefines + * @sa IoctlArgDefines + ***************************************************************************/ +PUBLIC IX_STATUS ixUARTIoctl(ixUARTDev* pUART, int cmd, void* arg); + +/** + * @} defgroup IxUARTAcc + */ |
