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device: Add device model infrastructure

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Add infrastructure support having multiple instances of a driver
configured into the system each with its own compile time
configuration information.

Change-Id: I1e447af18311139b43f74fe0439483ccd132b63f
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
This commit is contained in:
Dirk Brandewie 2015-06-01 11:11:39 -07:00 • committed by Anas Nashif
commit c9ac95a43a
6 changed files with 286 additions and 1 deletions
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include/device.h Normal file
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/* Copyright (c) 2015 Intel Corporation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2) Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3) Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _DEVICE_H_
#define _DEVICE_H_
/*! @def DECLARE_DEVICE_INIT_CONFIG
*
* @brief Define an config object
*
* @details This macro declares an config object to be placed in the
* image by the linker in the ROM region.
*
* @param cfg_name Name of the config object to be created. This name
* must be used in the *_init() macro(s) defined in init.h so the
* linker can associate the config object with the correct init
* object.
*
* @param drv_name The name this instance of the driver exposes to
* the system.
* @param init_fn Address to the init function of the driver.
* @param config The address to the structure containing the
* configuration information for this instance of the driver.
*
* @sa __define_initconfig()
*/
#define DECLARE_DEVICE_INIT_CONFIG(cfg_name, drv_name, init_fn, config) \
static struct device_config config_##cfg_name __used \
__attribute__((__section__(".devconfig.init"))) = { \
.name = drv_name, .init = (init_fn), \
.config_info = (config) \
};\
struct device;
/* Static device infomation (In ROM) Per driver instance */
struct device_config {
/*! name of the device */
char *name;
/*! init function for the driver */
int (*init)(struct device *device);
/*! address of driver instance config information */
void *config_info;
};
/* Runtime device structure (In memory) Per driver instance */
struct device {
/*! Build time config information */
struct device_config *config;
/*! pointer to structure containing the API functions for the
* device type. This pointer is filled in by the driver at
* init time.
*/
void *driver_api;
/*! Driver instance data. For driver use only*/
void *driver_data;
};
void device_do_config_level(int level);
struct device* device_get_binding(char *name);
#endif /* _DEVICE_H_ */