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