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 122