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/***********************license start***************
* Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights
* reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
* * Neither the name of Cavium Networks nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
* This Software, including technical data, may be subject to U.S. export control
* laws, including the U.S. Export Administration Act and its associated
* regulations, and may be subject to export or import regulations in other
* countries.
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR
* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
***********************license end**************************************/
/**
* @file
*
* interface to the serial port UART hardware
*
* <hr>$Revision: 52004 $<hr>
*
*/
#ifndef __CVMX_UART_H__
#define __CVMX_UART_H__
#ifdef __cplusplus
extern "C" {
#endif
#define CVMX_UART_NUM_PORTS 2
#define CVMX_UART_TX_FIFO_SIZE 64
#define CVMX_UART_RX_FIFO_SIZE 64
/* CSR typedefs have been moved to cvmx-uart-defs.h */
typedef void (*cvmx_uart_intr_handler_t)(int, uint64_t[], void *);
extern void cvmx_uart_enable_intr(int, cvmx_uart_intr_handler_t);
extern int cvmx_uart_setup2(int, int, int);
extern int cvmx_uart_setup(int);
/* Defined in libc. */
unsigned __octeon_uart_trylock (void);
void __octeon_uart_unlock (void);
/**
* Get a single byte from serial port.
*
* @param uart_index Uart to read from (0 or 1)
* @return The byte read
*/
static inline uint8_t cvmx_uart_read_byte(int uart_index)
{
cvmx_uart_lsr_t lsrval;
/* Spin until data is available */
do
{
lsrval.u64 = cvmx_read_csr(CVMX_MIO_UARTX_LSR(uart_index));
} while (!lsrval.s.dr);
/* Read and return the data */
return cvmx_read_csr(CVMX_MIO_UARTX_RBR(uart_index));
}
/**
* Get a single byte from serial port with a timeout.
*
* @param uart_index Uart to read from (0 or 1)
* @param timedout Record if a timeout has happened
* @param timeout the timeout count
* @return The byte read
*/
static inline uint8_t cvmx_uart_read_byte_with_timeout(int uart_index, int *timedout, volatile unsigned timeout)
{
cvmx_uart_lsr_t lsrval;
/* Spin until data is available */
*timedout = 0;
do
{
if(timeout == 0)
{
*timedout = 1;
return -1;
}
lsrval.u64 = cvmx_read_csr(CVMX_MIO_UARTX_LSR(uart_index));
timeout --;
} while (!lsrval.s.dr);
/* Read and return the data */
return cvmx_read_csr(CVMX_MIO_UARTX_RBR(uart_index));
}
/**
* Put a single byte to uart port.
*
* @param uart_index Uart to write to (0 or 1)
* @param ch Byte to write
*/
static inline void cvmx_uart_write_byte(int uart_index, uint8_t ch)
{
cvmx_uart_lsr_t lsrval;
/* Spin until there is room */
do
{
lsrval.u64 = cvmx_read_csr(CVMX_MIO_UARTX_LSR(uart_index));
}
while (lsrval.s.thre == 0);
/* Write the byte */
cvmx_write_csr(CVMX_MIO_UARTX_THR(uart_index), ch);
}
/**
* Write a string to the uart
*
* @param uart_index Uart to use (0 or 1)
* @param str String to write
*/
static inline void cvmx_uart_write_string(int uart_index, const char *str)
{
/* Just loop writing one byte at a time */
while (*str)
{
cvmx_uart_write_byte(uart_index, *str);
str++;
}
}
#ifdef __cplusplus
}
#endif
#endif /* __CVM_UART_H__ */
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