Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License version 2 as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
10 *
11 * Copyright (C) 2012 ARM Limited
12 */
13
14#ifndef _LINUX_VEXPRESS_H
15#define _LINUX_VEXPRESS_H
16
17#include <linux/device.h>
18
19#define VEXPRESS_SITE_MB 0
20#define VEXPRESS_SITE_DB1 1
21#define VEXPRESS_SITE_DB2 2
22#define VEXPRESS_SITE_MASTER 0xf
23
24#define VEXPRESS_CONFIG_STATUS_DONE 0
25#define VEXPRESS_CONFIG_STATUS_WAIT 1
26
27#define VEXPRESS_GPIO_MMC_CARDIN 0
28#define VEXPRESS_GPIO_MMC_WPROT 1
29#define VEXPRESS_GPIO_FLASH_WPn 2
30#define VEXPRESS_GPIO_LED0 3
31#define VEXPRESS_GPIO_LED1 4
32#define VEXPRESS_GPIO_LED2 5
33#define VEXPRESS_GPIO_LED3 6
34#define VEXPRESS_GPIO_LED4 7
35#define VEXPRESS_GPIO_LED5 8
36#define VEXPRESS_GPIO_LED6 9
37#define VEXPRESS_GPIO_LED7 10
38
39#define VEXPRESS_RES_FUNC(_site, _func) \
40{ \
41 .start = (_site), \
42 .end = (_func), \
43 .flags = IORESOURCE_BUS, \
44}
45
46/* Config bridge API */
47
48/**
49 * struct vexpress_config_bridge_info - description of the platform
50 * configuration infrastructure bridge.
51 *
52 * @name: Bridge name
53 *
54 * @func_get: Obtains pointer to a configuration function for a given
55 * device or a Device Tree node, to be used with @func_put
56 * and @func_exec. The node pointer should take precedence
57 * over device pointer when both are passed.
58 *
59 * @func_put: Tells the bridge that the function will not be used any
60 * more, so all allocated resources can be released.
61 *
62 * @func_exec: Executes a configuration function read or write operation.
63 * The offset selects a 32 bit word of the value accessed.
64 * Must return VEXPRESS_CONFIG_STATUS_DONE when operation
65 * is finished immediately, VEXPRESS_CONFIG_STATUS_WAIT when
66 * will be completed in some time or negative value in case
67 * of error.
68 */
69struct vexpress_config_bridge_info {
70 const char *name;
71 void *(*func_get)(struct device *dev, struct device_node *node);
72 void (*func_put)(void *func);
73 int (*func_exec)(void *func, int offset, bool write, u32 *data);
74};
75
76struct vexpress_config_bridge;
77
78struct vexpress_config_bridge *vexpress_config_bridge_register(
79 struct device_node *node,
80 struct vexpress_config_bridge_info *info);
81void vexpress_config_bridge_unregister(struct vexpress_config_bridge *bridge);
82
83void vexpress_config_complete(struct vexpress_config_bridge *bridge,
84 int status);
85
86/* Config function API */
87
88struct vexpress_config_func;
89
90struct vexpress_config_func *__vexpress_config_func_get(struct device *dev,
91 struct device_node *node);
92#define vexpress_config_func_get_by_dev(dev) \
93 __vexpress_config_func_get(dev, NULL)
94#define vexpress_config_func_get_by_node(node) \
95 __vexpress_config_func_get(NULL, node)
96void vexpress_config_func_put(struct vexpress_config_func *func);
97
98/* Both may sleep! */
99int vexpress_config_read(struct vexpress_config_func *func, int offset,
100 u32 *data);
101int vexpress_config_write(struct vexpress_config_func *func, int offset,
102 u32 data);
103
104/* Platform control */
105
106u32 vexpress_get_procid(int site);
107u32 vexpress_get_hbi(int site);
108void *vexpress_get_24mhz_clock_base(void);
109void vexpress_flags_set(u32 data);
110
111#define vexpress_get_site_by_node(node) __vexpress_get_site(NULL, node)
112#define vexpress_get_site_by_dev(dev) __vexpress_get_site(dev, NULL)
113unsigned __vexpress_get_site(struct device *dev, struct device_node *node);
114
115void vexpress_sysreg_early_init(void __iomem *base);
116void vexpress_sysreg_of_early_init(void);
117
118void vexpress_power_off(void);
119void vexpress_restart(char str, const char *cmd);
120
121/* Clocks */
122
123struct clk *vexpress_osc_setup(struct device *dev);
124void vexpress_osc_of_setup(struct device_node *node);
125
126void vexpress_clk_init(void __iomem *sp810_base);
127void vexpress_clk_of_init(void);
128
129#endif