| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 | 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_ */ |