arch/mips/include/asm/rtlx.h

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