LXR linux/include/linux/vexpress.h

   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#include <linux/reboot.h>
  19
  20#define VEXPRESS_SITE_MB                0
  21#define VEXPRESS_SITE_DB1               1
  22#define VEXPRESS_SITE_DB2               2
  23#define VEXPRESS_SITE_MASTER            0xf
  24
  25#define VEXPRESS_CONFIG_STATUS_DONE     0
  26#define VEXPRESS_CONFIG_STATUS_WAIT     1
  27
  28#define VEXPRESS_GPIO_MMC_CARDIN        0
  29#define VEXPRESS_GPIO_MMC_WPROT         1
  30#define VEXPRESS_GPIO_FLASH_WPn         2
  31#define VEXPRESS_GPIO_LED0              3
  32#define VEXPRESS_GPIO_LED1              4
  33#define VEXPRESS_GPIO_LED2              5
  34#define VEXPRESS_GPIO_LED3              6
  35#define VEXPRESS_GPIO_LED4              7
  36#define VEXPRESS_GPIO_LED5              8
  37#define VEXPRESS_GPIO_LED6              9
  38#define VEXPRESS_GPIO_LED7              10
  39
  40#define VEXPRESS_RES_FUNC(_site, _func) \
  41{                                       \
  42        .start = (_site),               \
  43        .end = (_func),                 \
  44        .flags = IORESOURCE_BUS,        \
  45}
  46
  47/* Config bridge API */
  48
  49/**
  50 * struct vexpress_config_bridge_info - description of the platform
  51 * configuration infrastructure bridge.
  52 *
  53 * @name:       Bridge name
  54 *
  55 * @func_get:   Obtains pointer to a configuration function for a given
  56 *              device or a Device Tree node, to be used with @func_put
  57 *              and @func_exec. The node pointer should take precedence
  58 *              over device pointer when both are passed.
  59 *
  60 * @func_put:   Tells the bridge that the function will not be used any
  61 *              more, so all allocated resources can be released.
  62 *
  63 * @func_exec:  Executes a configuration function read or write operation.
  64 *              The offset selects a 32 bit word of the value accessed.
  65 *              Must return VEXPRESS_CONFIG_STATUS_DONE when operation
  66 *              is finished immediately, VEXPRESS_CONFIG_STATUS_WAIT when
  67 *              will be completed in some time or negative value in case
  68 *              of error.
  69 */
  70struct vexpress_config_bridge_info {
  71        const char *name;
  72        void *(*func_get)(struct device *dev, struct device_node *node);
  73        void (*func_put)(void *func);
  74        int (*func_exec)(void *func, int offset, bool write, u32 *data);
  75};
  76
  77struct vexpress_config_bridge;
  78
  79struct vexpress_config_bridge *vexpress_config_bridge_register(
  80                struct device_node *node,
  81                struct vexpress_config_bridge_info *info);
  82void vexpress_config_bridge_unregister(struct vexpress_config_bridge *bridge);
  83
  84void vexpress_config_complete(struct vexpress_config_bridge *bridge,
  85                int status);
  86
  87/* Config function API */
  88
  89struct vexpress_config_func;
  90
  91struct vexpress_config_func *__vexpress_config_func_get(struct device *dev,
  92                struct device_node *node);
  93#define vexpress_config_func_get_by_dev(dev) \
  94                __vexpress_config_func_get(dev, NULL)
  95#define vexpress_config_func_get_by_node(node) \
  96                __vexpress_config_func_get(NULL, node)
  97void vexpress_config_func_put(struct vexpress_config_func *func);
  98
  99/* Both may sleep! */
 100int vexpress_config_read(struct vexpress_config_func *func, int offset,
 101                u32 *data);
 102int vexpress_config_write(struct vexpress_config_func *func, int offset,
 103                u32 data);
 104
 105/* Platform control */
 106
 107u32 vexpress_get_procid(int site);
 108u32 vexpress_get_hbi(int site);
 109void *vexpress_get_24mhz_clock_base(void);
 110void vexpress_flags_set(u32 data);
 111
 112#define vexpress_get_site_by_node(node) __vexpress_get_site(NULL, node)
 113#define vexpress_get_site_by_dev(dev) __vexpress_get_site(dev, NULL)
 114unsigned __vexpress_get_site(struct device *dev, struct device_node *node);
 115
 116void vexpress_sysreg_early_init(void __iomem *base);
 117void vexpress_sysreg_of_early_init(void);
 118
 119/* Clocks */
 120
 121struct clk *vexpress_osc_setup(struct device *dev);
 122void vexpress_osc_of_setup(struct device_node *node);
 123
 124void vexpress_clk_init(void __iomem *sp810_base);
 125void vexpress_clk_of_init(void);
 126
 127#endif
 128