linux/include/linux/vexpress.h
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   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
 130
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