170 lines
4.6 KiB
C
170 lines
4.6 KiB
C
/***********************license start***************
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* Copyright (c) 2003-2010 Cavium Inc. (support@cavium.com). All rights
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* reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of Cavium Inc. nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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* This Software, including technical data, may be subject to U.S. export control
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* laws, including the U.S. Export Administration Act and its associated
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* regulations, and may be subject to export or import regulations in other
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* countries.
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
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* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
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* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
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* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
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* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
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* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
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* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
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* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
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* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
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***********************license end**************************************/
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/**
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* @file
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*
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* interface to the serial port UART hardware
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*
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* <hr>$Revision: 70030 $<hr>
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*
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*/
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#ifndef __CVMX_UART_H__
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#define __CVMX_UART_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define CVMX_UART_NUM_PORTS 2
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#define CVMX_UART_TX_FIFO_SIZE 64
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#define CVMX_UART_RX_FIFO_SIZE 64
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/* CSR typedefs have been moved to cvmx-uart-defs.h */
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typedef void (*cvmx_uart_intr_handler_t)(int, uint64_t[], void *);
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extern void cvmx_uart_enable_intr(int, cvmx_uart_intr_handler_t);
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extern int cvmx_uart_setup2(int, int, int);
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extern int cvmx_uart_setup(int);
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/* Defined in libc. */
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unsigned __octeon_uart_trylock (void);
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void __octeon_uart_unlock (void);
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/**
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* Get a single byte from serial port.
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*
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* @param uart_index Uart to read from (0 or 1)
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* @return The byte read
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*/
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static inline uint8_t cvmx_uart_read_byte(int uart_index)
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{
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cvmx_uart_lsr_t lsrval;
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/* Spin until data is available */
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do
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{
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lsrval.u64 = cvmx_read_csr(CVMX_MIO_UARTX_LSR(uart_index));
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} while (!lsrval.s.dr);
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/* Read and return the data */
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return cvmx_read_csr(CVMX_MIO_UARTX_RBR(uart_index));
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}
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/**
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* Get a single byte from serial port with a timeout.
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*
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* @param uart_index Uart to read from (0 or 1)
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* @param timedout Record if a timeout has happened
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* @param timeout the timeout count
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* @return The byte read
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*/
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static inline uint8_t cvmx_uart_read_byte_with_timeout(int uart_index, int *timedout, volatile unsigned timeout)
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{
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cvmx_uart_lsr_t lsrval;
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/* Spin until data is available */
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*timedout = 0;
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do
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{
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if(timeout == 0)
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{
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*timedout = 1;
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return -1;
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}
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lsrval.u64 = cvmx_read_csr(CVMX_MIO_UARTX_LSR(uart_index));
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timeout --;
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} while (!lsrval.s.dr);
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/* Read and return the data */
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return cvmx_read_csr(CVMX_MIO_UARTX_RBR(uart_index));
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}
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/**
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* Put a single byte to uart port.
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*
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* @param uart_index Uart to write to (0 or 1)
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* @param ch Byte to write
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*/
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static inline void cvmx_uart_write_byte(int uart_index, uint8_t ch)
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{
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cvmx_uart_lsr_t lsrval;
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/* Spin until there is room */
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do
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{
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lsrval.u64 = cvmx_read_csr(CVMX_MIO_UARTX_LSR(uart_index));
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}
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while (lsrval.s.thre == 0);
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/* Write the byte */
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cvmx_write_csr(CVMX_MIO_UARTX_THR(uart_index), ch);
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}
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/**
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* Write a string to the uart
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*
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* @param uart_index Uart to use (0 or 1)
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* @param str String to write
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*/
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static inline void cvmx_uart_write_string(int uart_index, const char *str)
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{
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/* Just loop writing one byte at a time */
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while (*str)
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{
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cvmx_uart_write_byte(uart_index, *str);
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str++;
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}
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* __CVM_UART_H__ */
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