mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-08 05:43:21 +09:00
![Wolfgang Denk](/assets/img/avatar_default.png)
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini Don't remove some copyrights by accident] Signed-off-by: Tom Rini <trini@ti.com>
435 lines
8.1 KiB
C
435 lines
8.1 KiB
C
/**
|
|
* @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
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
* @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
|
|
*/
|