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
  30 void rtlx_starting(int vpe);
  31 void rtlx_stopping(int vpe);
  32
  33 int rtlx_open(int index, int can_sleep);
  34 int rtlx_release(int index);
  35 ssize_t rtlx_read(int index, void __user *buff, size_t count);
  36 ssize_t rtlx_write(int index, const void __user *buffer, size_t count);
  37 unsigned int rtlx_read_poll(int index, int can_sleep);
  38 unsigned int rtlx_write_poll(int index);
  39
  40 int __init rtlx_module_init(void);
  41 void __exit rtlx_module_exit(void);
  42
  43 void _interrupt_sp(void);
  44
  45 extern struct vpe_notifications rtlx_notify;
  46 extern const struct file_operations rtlx_fops;
  47 extern void (*aprp_hook)(void);
  48
  49 enum rtlx_state {
  50         RTLX_STATE_UNUSED = 0,
  51         RTLX_STATE_INITIALISED,
  52         RTLX_STATE_REMOTE_READY,
  53         RTLX_STATE_OPENED
  54 };
  55
  56 extern 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 */
  67 struct 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
  81 extern struct rtlx_info {
  82         unsigned long id;
  83         enum rtlx_state state;
  84
  85         struct rtlx_channel channel[RTLX_CHANNELS];
  86 } *rtlx;
  87 #endif /* __ASM_RTLX_H_ */