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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2004, 2005 MIPS Technologies, Inc. All rights reserved.
* Copyright (C) 2013 Imagination Technologies Ltd.
*/
#ifndef __ASM_RTLX_H_
#define __ASM_RTLX_H_
#include <irq.h>
#define RTLX_MODULE_NAME "rtlx"
#define LX_NODE_BASE 10
#define MIPS_CPU_RTLX_IRQ 0
#define RTLX_VERSION 2
#define RTLX_xID 0x12345600
#define RTLX_ID (RTLX_xID | RTLX_VERSION)
#define RTLX_BUFFER_SIZE 2048
#define RTLX_CHANNELS 8
#define RTLX_CHANNEL_STDIO 0
#define RTLX_CHANNEL_DBG 1
#define RTLX_CHANNEL_SYSIO 2
void rtlx_starting(int vpe);
void rtlx_stopping(int vpe);
int rtlx_open(int index, int can_sleep);
int rtlx_release(int index);
ssize_t rtlx_read(int index, void __user *buff, size_t count);
ssize_t rtlx_write(int index, const void __user *buffer, size_t count);
unsigned int rtlx_read_poll(int index, int can_sleep);
unsigned int rtlx_write_poll(int index);
int __init rtlx_module_init(void);
void __exit rtlx_module_exit(void);
void _interrupt_sp(void);
extern struct vpe_notifications rtlx_notify;
extern const struct file_operations rtlx_fops;
extern void (*aprp_hook)(void);
enum rtlx_state {
RTLX_STATE_UNUSED = 0,
RTLX_STATE_INITIALISED,
RTLX_STATE_REMOTE_READY,
RTLX_STATE_OPENED
};
extern struct chan_waitqueues {
wait_queue_head_t rt_queue;
wait_queue_head_t lx_queue;
atomic_t in_open;
struct mutex mutex;
} channel_wqs[RTLX_CHANNELS];
/* each channel supports read and write.
linux (vpe0) reads lx_buffer and writes rt_buffer
SP (vpe1) reads rt_buffer and writes lx_buffer
*/
struct rtlx_channel {
enum rtlx_state rt_state;
enum rtlx_state lx_state;
int buffer_size;
/* read and write indexes per buffer */
int rt_write, rt_read;
char *rt_buffer;
int lx_write, lx_read;
char *lx_buffer;
};
extern struct rtlx_info {
unsigned long id;
enum rtlx_state state;
struct rtlx_channel channel[RTLX_CHANNELS];
} *rtlx;
#endif /* __ASM_RTLX_H_ */
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