| Pawel Moll | 3ecbf05 | 2012-09-24 14:55:40 +0100 | [diff] [blame^] | 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 |