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  */
  70 struct 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
  77 struct vexpress_config_bridge;
  78
  79 struct vexpress_config_bridge *vexpress_config_bridge_register(
  80                 struct device_node *node,
  81                 struct vexpress_config_bridge_info *info);
  82 void vexpress_config_bridge_unregister(struct vexpress_config_bridge *bridge);
  83
  84 void vexpress_config_complete(struct vexpress_config_bridge *bridge,
  85                 int status);
  86
  87 /* Config function API */
  88
  89 struct vexpress_config_func;
  90
  91 struct 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)
  97 void vexpress_config_func_put(struct vexpress_config_func *func);
  98
  99 /* Both may sleep! */
 100 int vexpress_config_read(struct vexpress_config_func *func, int offset,
 101                 u32 *data);
 102 int vexpress_config_write(struct vexpress_config_func *func, int offset,
 103                 u32 data);
 104
 105 /* Platform control */
 106
 107 u32 vexpress_get_procid(int site);
 108 u32 vexpress_get_hbi(int site);
 109 void *vexpress_get_24mhz_clock_base(void);
 110 void 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)
 114 unsigned __vexpress_get_site(struct device *dev, struct device_node *node);
 115
 116 void vexpress_sysreg_early_init(void __iomem *base);
 117 void vexpress_sysreg_of_early_init(void);
 118
 119 /* Clocks */
 120
 121 struct clk *vexpress_osc_setup(struct device *dev);
 122 void vexpress_osc_of_setup(struct device_node *node);
 123
 124 void vexpress_clk_init(void __iomem *sp810_base);
 125 void vexpress_clk_of_init(void);
 126
 127 #endif