LXR linux/arch/mips/include/asm/rtlx.h

   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * Copyright (C) 2004, 2005 MIPS Technologies, Inc.  All rights reserved.
   7 * Copyright (C) 2013 Imagination Technologies Ltd.
   8 */
   9#ifndef __ASM_RTLX_H_
  10#define __ASM_RTLX_H_
  11
  12#include <irq.h>
  13
  14#define RTLX_MODULE_NAME "rtlx"
  15
  16#define LX_NODE_BASE 10
  17
  18#define MIPS_CPU_RTLX_IRQ 0
  19
  20#define RTLX_VERSION 2
  21#define RTLX_xID 0x12345600
  22#define RTLX_ID (RTLX_xID | RTLX_VERSION)
  23#define RTLX_BUFFER_SIZE 2048
  24#define RTLX_CHANNELS 8
  25
  26#define RTLX_CHANNEL_STDIO      0
  27#define RTLX_CHANNEL_DBG        1
  28#define RTLX_CHANNEL_SYSIO      2
  29
  30void rtlx_starting(int vpe);
  31void rtlx_stopping(int vpe);
  32
  33int rtlx_open(int index, int can_sleep);
  34int rtlx_release(int index);
  35ssize_t rtlx_read(int index, void __user *buff, size_t count);
  36ssize_t rtlx_write(int index, const void __user *buffer, size_t count);
  37unsigned int rtlx_read_poll(int index, int can_sleep);
  38unsigned int rtlx_write_poll(int index);
  39
  40int __init rtlx_module_init(void);
  41void __exit rtlx_module_exit(void);
  42
  43void _interrupt_sp(void);
  44
  45extern struct vpe_notifications rtlx_notify;
  46extern const struct file_operations rtlx_fops;
  47extern void (*aprp_hook)(void);
  48
  49enum rtlx_state {
  50        RTLX_STATE_UNUSED = 0,
  51        RTLX_STATE_INITIALISED,
  52        RTLX_STATE_REMOTE_READY,
  53        RTLX_STATE_OPENED
  54};
  55
  56extern struct chan_waitqueues {
  57        wait_queue_head_t rt_queue;
  58        wait_queue_head_t lx_queue;
  59        atomic_t in_open;
  60        struct mutex mutex;
  61} channel_wqs[RTLX_CHANNELS];
  62
  63/* each channel supports read and write.
  64   linux (vpe0) reads lx_buffer and writes rt_buffer
  65   SP (vpe1) reads rt_buffer and writes lx_buffer
  66*/
  67struct rtlx_channel {
  68        enum rtlx_state rt_state;
  69        enum rtlx_state lx_state;
  70
  71        int buffer_size;
  72
  73        /* read and write indexes per buffer */
  74        int rt_write, rt_read;
  75        char *rt_buffer;
  76
  77        int lx_write, lx_read;
  78        char *lx_buffer;
  79};
  80
  81extern struct rtlx_info {
  82        unsigned long id;
  83        enum rtlx_state state;
  84        int ap_int_pending;     /* Status of 0 or 1 for CONFIG_MIPS_CMP only */
  85
  86        struct rtlx_channel channel[RTLX_CHANNELS];
  87} *rtlx;
  88#endif /* __ASM_RTLX_H_ */
  89