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