projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 3ecbf05b PM |
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 | /* Config bridge API */ | |
| 28 | ||
| 29 | /** | |
| 30 | * struct vexpress_config_bridge_info - description of the platform | |
| 31 | * configuration infrastructure bridge. | |
| 32 | * | |
| 33 | * @name: Bridge name | |
| 34 | * | |
| 35 | * @func_get: Obtains pointer to a configuration function for a given | |
| 36 | * device or a Device Tree node, to be used with @func_put | |
| 37 | * and @func_exec. The node pointer should take precedence | |
| 38 | * over device pointer when both are passed. | |
| 39 | * | |
| 40 | * @func_put: Tells the bridge that the function will not be used any | |
| 41 | * more, so all allocated resources can be released. | |
| 42 | * | |
| 43 | * @func_exec: Executes a configuration function read or write operation. | |
| 44 | * The offset selects a 32 bit word of the value accessed. | |
| 45 | * Must return VEXPRESS_CONFIG_STATUS_DONE when operation | |
| 46 | * is finished immediately, VEXPRESS_CONFIG_STATUS_WAIT when | |
| 47 | * will be completed in some time or negative value in case | |
| 48 | * of error. | |
| 49 | */ | |
| 50 | struct vexpress_config_bridge_info { | |
| 51 | const char *name; | |
| 52 | void *(*func_get)(struct device *dev, struct device_node *node); | |
| 53 | void (*func_put)(void *func); | |
| 54 | int (*func_exec)(void *func, int offset, bool write, u32 *data); | |
| 55 | }; | |
| 56 | ||
| 57 | struct vexpress_config_bridge; | |
| 58 | ||
| 59 | struct vexpress_config_bridge *vexpress_config_bridge_register( | |
| 60 | struct device_node *node, | |
| 61 | struct vexpress_config_bridge_info *info); | |
| 62 | void vexpress_config_bridge_unregister(struct vexpress_config_bridge *bridge); | |
| 63 | ||
| 64 | void vexpress_config_complete(struct vexpress_config_bridge *bridge, | |
| 65 | int status); | |
| 66 | ||
| 67 | /* Config function API */ | |
| 68 | ||
| 69 | struct vexpress_config_func; | |
| 70 | ||
| 71 | struct vexpress_config_func *__vexpress_config_func_get(struct device *dev, | |
| 72 | struct device_node *node); | |
| 73 | #define vexpress_config_func_get_by_dev(dev) \ | |
| 74 | __vexpress_config_func_get(dev, NULL) | |
| 75 | #define vexpress_config_func_get_by_node(node) \ | |
| 76 | __vexpress_config_func_get(NULL, node) | |
| 77 | void vexpress_config_func_put(struct vexpress_config_func *func); | |
| 78 | ||
| 79 | /* Both may sleep! */ | |
| 80 | int vexpress_config_read(struct vexpress_config_func *func, int offset, | |
| 81 | u32 *data); | |
| 82 | int vexpress_config_write(struct vexpress_config_func *func, int offset, | |
| 83 | u32 data); | |
| 84 | ||
| 85 | #endif |