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Diffstat (limited to 'include/linux/vexpress.h')
| -rw-r--r-- | include/linux/vexpress.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/include/linux/vexpress.h b/include/linux/vexpress.h new file mode 100644 index 000000000000..c52215ff4245 --- /dev/null +++ b/include/linux/vexpress.h @@ -0,0 +1,121 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Copyright (C) 2012 ARM Limited + */ + +#ifndef _LINUX_VEXPRESS_H +#define _LINUX_VEXPRESS_H + +#include <linux/device.h> + +#define VEXPRESS_SITE_MB 0 +#define VEXPRESS_SITE_DB1 1 +#define VEXPRESS_SITE_DB2 2 +#define VEXPRESS_SITE_MASTER 0xf + +#define VEXPRESS_CONFIG_STATUS_DONE 0 +#define VEXPRESS_CONFIG_STATUS_WAIT 1 + +#define VEXPRESS_GPIO_MMC_CARDIN 0 +#define VEXPRESS_GPIO_MMC_WPROT 1 +#define VEXPRESS_GPIO_FLASH_WPn 2 + +#define VEXPRESS_RES_FUNC(_site, _func) \ +{ \ + .start = (_site), \ + .end = (_func), \ + .flags = IORESOURCE_BUS, \ +} + +/* Config bridge API */ + +/** + * struct vexpress_config_bridge_info - description of the platform + * configuration infrastructure bridge. + * + * @name: Bridge name + * + * @func_get: Obtains pointer to a configuration function for a given + * device or a Device Tree node, to be used with @func_put + * and @func_exec. The node pointer should take precedence + * over device pointer when both are passed. + * + * @func_put: Tells the bridge that the function will not be used any + * more, so all allocated resources can be released. + * + * @func_exec: Executes a configuration function read or write operation. + * The offset selects a 32 bit word of the value accessed. + * Must return VEXPRESS_CONFIG_STATUS_DONE when operation + * is finished immediately, VEXPRESS_CONFIG_STATUS_WAIT when + * will be completed in some time or negative value in case + * of error. + */ +struct vexpress_config_bridge_info { + const char *name; + void *(*func_get)(struct device *dev, struct device_node *node); + void (*func_put)(void *func); + int (*func_exec)(void *func, int offset, bool write, u32 *data); +}; + +struct vexpress_config_bridge; + +struct vexpress_config_bridge *vexpress_config_bridge_register( + struct device_node *node, + struct vexpress_config_bridge_info *info); +void vexpress_config_bridge_unregister(struct vexpress_config_bridge *bridge); + +void vexpress_config_complete(struct vexpress_config_bridge *bridge, + int status); + +/* Config function API */ + +struct vexpress_config_func; + +struct vexpress_config_func *__vexpress_config_func_get(struct device *dev, + struct device_node *node); +#define vexpress_config_func_get_by_dev(dev) \ + __vexpress_config_func_get(dev, NULL) +#define vexpress_config_func_get_by_node(node) \ + __vexpress_config_func_get(NULL, node) +void vexpress_config_func_put(struct vexpress_config_func *func); + +/* Both may sleep! */ +int vexpress_config_read(struct vexpress_config_func *func, int offset, + u32 *data); +int vexpress_config_write(struct vexpress_config_func *func, int offset, + u32 data); + +/* Platform control */ + +u32 vexpress_get_procid(int site); +u32 vexpress_get_hbi(int site); +void *vexpress_get_24mhz_clock_base(void); +void vexpress_flags_set(u32 data); + +#define vexpress_get_site_by_node(node) __vexpress_get_site(NULL, node) +#define vexpress_get_site_by_dev(dev) __vexpress_get_site(dev, NULL) +unsigned __vexpress_get_site(struct device *dev, struct device_node *node); + +void vexpress_sysreg_early_init(void __iomem *base); +void vexpress_sysreg_of_early_init(void); + +void vexpress_power_off(void); +void vexpress_restart(char str, const char *cmd); + +/* Clocks */ + +struct clk *vexpress_osc_setup(struct device *dev); +void vexpress_osc_of_setup(struct device_node *node); + +void vexpress_clk_init(void __iomem *sp810_base); +void vexpress_clk_of_init(void); + +#endif |