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 128