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https://github.com/AsahiLinux/u-boot
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cb3761ea99
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini Don't remove some copyrights by accident] Signed-off-by: Tom Rini <trini@ti.com>
434 lines
8.1 KiB
C
434 lines
8.1 KiB
C
/**
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* @file IxUART.h
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*
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* @date 12-OCT-01
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*
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* @brief Public header for the Intel IXP400 internal UART, generic driver.
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*
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* Design Notes:
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* This driver allows you to perform the following functions:
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* Device Initialization,
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* send/receive characters.
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*
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* Perform Uart IOCTL for the following:
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* Set/Get the current baud rate,
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* set parity,
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* set the number of Stop bits,
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* set the character Length (5,6,7,8),
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* enable/disable Hardware flow control.
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*
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* Only Polled mode is supported for now.
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*
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*
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* @par
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* IXP400 SW Release version 2.0
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*
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* -- Copyright Notice --
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*
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* @par
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* Copyright 2001-2005, Intel Corporation.
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* All rights reserved.
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*
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* @par
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* SPDX-License-Identifier: BSD-3-Clause
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* @par
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* -- End of Copyright Notice --
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*/
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/**
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* @defgroup IxUARTAccAPI IXP400 UART Access (IxUARTAcc) API
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*
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* @brief IXP400 UARTAcc Driver Public API
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*
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* @{
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*/
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/* Defaults */
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/**
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* @defgroup DefaultDefines Defines for Default Values
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*
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* @brief Default values which can be used for UART configuration
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*
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* @sa ixUARTDev
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*/
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/**
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* @def IX_UART_DEF_OPTS
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*
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* @brief The default hardware options to set the UART to -
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* no flow control, 8 bit word, 1 stop bit, no parity
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*
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* @ingroup DefaultDefines
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*/
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#define IX_UART_DEF_OPTS (CLOCAL | CS8)
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/**
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* @def IX_UART_DEF_XMIT
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*
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* @brief The default UART FIFO size - must be no bigger than 64
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*
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* @ingroup DefaultDefines
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*/
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#define IX_UART_DEF_XMIT 64
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/**
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* @def IX_UART_DEF_BAUD
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*
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* @brief The default UART baud rate - 9600
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*
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* @ingroup DefaultDefines
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*/
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#define IX_UART_DEF_BAUD 9600
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/**
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* @def IX_UART_MIN_BAUD
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*
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* @brief The minimum UART baud rate - 9600
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*
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* @ingroup DefaultDefines
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*/
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#define IX_UART_MIN_BAUD 9600
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/**
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* @def IX_UART_MAX_BAUD
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*
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* @brief The maximum UART baud rate - 926100
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*
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* @ingroup DefaultDefines
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*/
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#define IX_UART_MAX_BAUD 926100
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/**
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* @def IX_UART_XTAL
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*
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* @brief The UART clock speed
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*
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* @ingroup DefaultDefines
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*/
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#define IX_UART_XTAL 14745600
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/* IOCTL commands (Request codes) */
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/**
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* @defgroup IoctlCommandDefines Defines for IOCTL Commands
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*
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* @brief IOCTL Commands (Request codes) which can be used
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* with @ref ixUARTIoctl
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*/
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/**
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* @ingroup IoctlCommandDefines
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*
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* @def IX_BAUD_SET
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*
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* @brief Set the baud rate
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*/
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#define IX_BAUD_SET 0
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/**
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* @ingroup IoctlCommandDefines
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*
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* @def IX_BAUD_GET
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*
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* @brief Get the baud rate
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*/
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#define IX_BAUD_GET 1
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/**
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* @ingroup IoctlCommandDefines
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* @def IX_MODE_SET
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* @brief Set the UART mode of operation
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*/
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#define IX_MODE_SET 2
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/**
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* @ingroup IoctlCommandDefines
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*
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* @def IX_MODE_GET
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*
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* @brief Get the current UART mode of operation
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*/
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#define IX_MODE_GET 3
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/**
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* @ingroup IoctlCommandDefines
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*
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* @def IX_OPTS_SET
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*
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* @brief Set the UART device options
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*/
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#define IX_OPTS_SET 4
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/**
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* @ingroup IoctlCommandDefines
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*
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* @def IX_OPTS_GET
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*
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* @brief Get the UART device options
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*/
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#define IX_OPTS_GET 5
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/**
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* @ingroup IoctlCommandDefines
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*
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* @def IX_STATS_GET
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*
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* @brief Get the UART statistics
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*/
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#define IX_STATS_GET 6
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/* POSIX style ioctl arguments */
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/**
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* @defgroup IoctlArgDefines Defines for IOCTL Arguments
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*
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* @brief POSIX style IOCTL arguments which can be used
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* with @ref ixUARTIoctl
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*
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* @sa ixUARTMode
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*/
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/**
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* @ingroup IoctlArgDefines
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*
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* @def CLOCAL
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*
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* @brief Software flow control
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*/
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#ifdef CLOCAL
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#undef CLOCAL
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#endif
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#define CLOCAL 0x1
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/**
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* @ingroup IoctlArgDefines
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*
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* @def CREAD
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*
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* @brief Enable interrupt receiver
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*/
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#ifdef CREAD
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#undef CREAD
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#endif
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#define CREAD 0x2
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/**
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* @ingroup IoctlArgDefines
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*
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* @def CSIZE
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*
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* @brief Characters size
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*/
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#ifdef CSIZE
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#undef CSIZE
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#endif
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#define CSIZE 0xc
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/**
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* @ingroup IoctlArgDefines
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*
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* @def CS5
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*
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* @brief 5 bits
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*/
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#ifdef CS5
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#undef CS5
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#endif
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#define CS5 0x0
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/**
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* @ingroup IoctlArgDefines
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*
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* @def CS6
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*
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* @brief 6 bits
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*/
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#ifdef CS6
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#undef CS6
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#endif
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#define CS6 0x4
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/**
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* @ingroup IoctlArgDefines
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*
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* @def CS7
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*
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* @brief 7 bits
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*/
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#ifdef CS7
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#undef CS7
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#endif
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#define CS7 0x8
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/**
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* @ingroup IoctlArgDefines
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*
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* @def CS8
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*
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* @brief 8 bits
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*/
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#ifdef CS8
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#undef CS8
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#endif
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#define CS8 0xc
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/**
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* @ingroup IoctlArgDefines
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*
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* @def STOPB
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*
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* @brief Send two stop bits (else one)
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*/
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#define STOPB 0x20
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/**
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* @ingroup IoctlArgDefines
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*
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* @def PARENB
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*
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* @brief Parity detection enabled (else disabled)
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*/
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#ifdef PARENB
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#undef PARENB
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#endif
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#define PARENB 0x40
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/**
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* @ingroup IoctlArgDefines
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*
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* @def PARODD
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*
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* @brief Odd parity (else even)
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*/
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#ifdef PARODD
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#undef PARODD
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#endif
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#define PARODD 0x80
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/**
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* @enum ixUARTMode
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* @brief The mode to set to UART to.
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*/
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typedef enum
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{
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INTERRUPT=0, /**< Interrupt mode */
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POLLED, /**< Polled mode */
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LOOPBACK /**< Loopback mode */
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} ixUARTMode;
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/**
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* @struct ixUARTStats
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* @brief Statistics for the UART.
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*/
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typedef struct
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{
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UINT32 rxCount;
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UINT32 txCount;
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UINT32 overrunErr;
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UINT32 parityErr;
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UINT32 framingErr;
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UINT32 breakErr;
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} ixUARTStats;
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/**
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* @struct ixUARTDev
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* @brief Device descriptor for the UART.
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*/
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typedef struct
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{
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UINT8 *addr; /**< device base address */
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ixUARTMode mode; /**< interrupt, polled or loopback */
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int baudRate; /**< baud rate */
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int freq; /**< UART clock frequency */
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int options; /**< hardware options */
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int fifoSize; /**< FIFO xmit size */
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ixUARTStats stats; /**< device statistics */
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} ixUARTDev;
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/**
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* @ingroup IxUARTAccAPI
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*
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* @fn IX_STATUS ixUARTInit(ixUARTDev* pUART)
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*
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* @param pUART @ref ixUARTDev [in] - pointer to UART structure describing our device.
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*
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* @brief Initialise the UART. This puts the chip in a quiescent state.
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*
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* @pre The base address for the UART must contain a valid value.
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* Also the baud rate and hardware options must contain sensible values
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* otherwise the defaults will be used as defined in ixUART.h
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*
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* @post UART is initialized and ready to send and receive data.
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*
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* @note This function should only be called once per device.
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*
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* @retval IX_SUCCESS - UART device successfully initialised.
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* @retval IX_FAIL - Critical error, device not initialised.
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***************************************************************************/
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PUBLIC IX_STATUS ixUARTInit(ixUARTDev* pUART);
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/**
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* @ingroup IxUARTAccAPI
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*
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* @fn IX_STATUS ixUARTPollOutput(ixUARTDev* pUART, int outChar)
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*
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* @param pUART @ref ixUARTDev [out] - pointer to UART structure describing our device.
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* @param outChar int [out] - character to transmit.
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*
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* @brief Transmit a character in polled mode.
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*
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* @pre UART device must be initialised.
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*
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* @retval IX_SUCCESS - character was successfully transmitted.
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* @retval IX_FAIL - output buffer is full (try again).
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***************************************************************************/
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PUBLIC IX_STATUS ixUARTPollOutput(ixUARTDev* pUART, int outChar);
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/**
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* @ingroup IxUARTAccAPI
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*
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* @fn IX_STATUS ixUARTPollInput(ixUARTDev* pUART, char *inChar)
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*
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* @param pUART @ref ixUARTDev [in] - pointer to UART structure describing our device.
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* @param *inChar char [in] - character read from the device.
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*
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* @brief Receive a character in polled mode.
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*
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* @pre UART device must be initialised.
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*
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* @retval IX_SUCCESS - character was successfully read.
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* @retval IX_FAIL - input buffer empty (try again).
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***************************************************************************/
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PUBLIC IX_STATUS ixUARTPollInput(ixUARTDev* pUART, char *inChar);
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/**
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* @ingroup IxUARTAccAPI
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*
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* @fn IX_STATUS ixUARTIoctl(ixUARTDev* pUART, int cmd, void* arg)
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*
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* @param pUART @ref ixUARTDev [in] - pointer to UART structure describing our device.
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* @param cmd int [in] - an ioctl request code.
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* @param arg void* [in] - optional argument used to set the device mode,
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* baud rate, and hardware options.
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*
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* @brief Perform I/O control routines on the device.
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*
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* @retval IX_SUCCESS - requested feature was set/read successfully.
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* @retval IX_FAIL - error setting/reading the requested feature.
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*
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* @sa IoctlCommandDefines
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* @sa IoctlArgDefines
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***************************************************************************/
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PUBLIC IX_STATUS ixUARTIoctl(ixUARTDev* pUART, int cmd, void* arg);
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/**
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* @} defgroup IxUARTAcc
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*/
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