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
31#define VEXPRESS_RES_FUNC(_site, _func) \
32{ \
33 .start = (_site), \
34 .end = (_func), \
35 .flags = IORESOURCE_BUS, \
36}
37
38/* Config bridge API */
39
40/**
41 * struct vexpress_config_bridge_info - description of the platform
42 * configuration infrastructure bridge.
43 *
44 * @name: Bridge name
45 *
46 * @func_get: Obtains pointer to a configuration function for a given
47 * device or a Device Tree node, to be used with @func_put
48 * and @func_exec. The node pointer should take precedence
49 * over device pointer when both are passed.
50 *
51 * @func_put: Tells the bridge that the function will not be used any
52 * more, so all allocated resources can be released.
53 *
54 * @func_exec: Executes a configuration function read or write operation.
55 * The offset selects a 32 bit word of the value accessed.
56 * Must return VEXPRESS_CONFIG_STATUS_DONE when operation
57 * is finished immediately, VEXPRESS_CONFIG_STATUS_WAIT when
58 * will be completed in some time or negative value in case
59 * of error.
60 */
61struct vexpress_config_bridge_info {
62 const char *name;
63 void *(*func_get)(struct device *dev, struct device_node *node);
64 void (*func_put)(void *func);
65 int (*func_exec)(void *func, int offset, bool write, u32 *data);
66};
67
68struct vexpress_config_bridge;
69
70struct vexpress_config_bridge *vexpress_config_bridge_register(
71 struct device_node *node,
72 struct vexpress_config_bridge_info *info);
73void vexpress_config_bridge_unregister(struct vexpress_config_bridge *bridge);
74
75void vexpress_config_complete(struct vexpress_config_bridge *bridge,
76 int status);
77
78/* Config function API */
79
80struct vexpress_config_func;
81
82struct vexpress_config_func *__vexpress_config_func_get(struct device *dev,
83 struct device_node *node);
84#define vexpress_config_func_get_by_dev(dev) \
85 __vexpress_config_func_get(dev, NULL)
86#define vexpress_config_func_get_by_node(node) \
87 __vexpress_config_func_get(NULL, node)
88void vexpress_config_func_put(struct vexpress_config_func *func);
89
90/* Both may sleep! */
91int vexpress_config_read(struct vexpress_config_func *func, int offset,
92 u32 *data);
93int vexpress_config_write(struct vexpress_config_func *func, int offset,
94 u32 data);
95
96/* Platform control */
97
98u32 vexpress_get_procid(int site);
99u32 vexpress_get_hbi(int site);
100void *vexpress_get_24mhz_clock_base(void);
101void vexpress_flags_set(u32 data);
102
103#define vexpress_get_site_by_node(node) __vexpress_get_site(NULL, node)
104#define vexpress_get_site_by_dev(dev) __vexpress_get_site(dev, NULL)
105unsigned __vexpress_get_site(struct device *dev, struct device_node *node);
106
107void vexpress_sysreg_early_init(void __iomem *base);
108void vexpress_sysreg_of_early_init(void);
109
110void vexpress_power_off(void);
111void vexpress_restart(char str, const char *cmd);
112
113/* Clocks */
114
115struct clk *vexpress_osc_setup(struct device *dev);
116void vexpress_osc_of_setup(struct device_node *node);
117
118void vexpress_clk_init(void __iomem *sp810_base);
119void vexpress_clk_of_init(void);
120
121#endif