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
  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  */
  61 struct 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
  68 struct vexpress_config_bridge;
  69
  70 struct vexpress_config_bridge *vexpress_config_bridge_register(
  71                 struct device_node *node,
  72                 struct vexpress_config_bridge_info *info);
  73 void vexpress_config_bridge_unregister(struct vexpress_config_bridge *bridge);
  74
  75 void vexpress_config_complete(struct vexpress_config_bridge *bridge,
  76                 int status);
  77
  78 /* Config function API */
  79
  80 struct vexpress_config_func;
  81
  82 struct 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)
  88 void vexpress_config_func_put(struct vexpress_config_func *func);
  89
  90 /* Both may sleep! */
  91 int vexpress_config_read(struct vexpress_config_func *func, int offset,
  92                 u32 *data);
  93 int vexpress_config_write(struct vexpress_config_func *func, int offset,
  94                 u32 data);
  95
  96 /* Platform control */
  97
  98 u32 vexpress_get_procid(int site);
  99 u32 vexpress_get_hbi(int site);
 100 void *vexpress_get_24mhz_clock_base(void);
 101 void 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)
 105 unsigned __vexpress_get_site(struct device *dev, struct device_node *node);
 106
 107 void vexpress_sysreg_early_init(void __iomem *base);
 108 void vexpress_sysreg_of_early_init(void);
 109
 110 void vexpress_power_off(void);
 111 void vexpress_restart(char str, const char *cmd);
 112
 113 /* Clocks */
 114
 115 struct clk *vexpress_osc_setup(struct device *dev);
 116 void vexpress_osc_of_setup(struct device_node *node);
 117
 118 void vexpress_clk_init(void __iomem *sp810_base);
 119 void vexpress_clk_of_init(void);
 120
 121 #endif