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/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only 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.
*/
#define pr_fmt(fmt) "%s: " fmt, __func__
#include <linux/uio_driver.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#define DRIVER_NAME "msm_sharedmem"
static int msm_sharedmem_probe(struct platform_device *pdev)
{
int ret = 0;
struct uio_info *info = NULL;
struct resource *clnt_res = NULL;
/* Get the addresses from platform-data */
if (!pdev->dev.of_node) {
pr_err("Node not found\n");
ret = -ENODEV;
goto out;
}
clnt_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!clnt_res) {
pr_err("resource not found\n");
return -ENODEV;
}
info = devm_kzalloc(&pdev->dev, sizeof(struct uio_info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->name = clnt_res->name;
info->version = "1.0";
info->mem[0].addr = clnt_res->start;
info->mem[0].size = resource_size(clnt_res);
info->mem[0].memtype = UIO_MEM_PHYS;
/* Setup device */
ret = uio_register_device(&pdev->dev, info);
if (ret)
goto out;
dev_set_drvdata(&pdev->dev, info);
pr_debug("Device created for client '%s'\n", clnt_res->name);
out:
return ret;
}
static int msm_sharedmem_remove(struct platform_device *pdev)
{
struct uio_info *info = dev_get_drvdata(&pdev->dev);
uio_unregister_device(info);
return 0;
}
static struct of_device_id msm_sharedmem_of_match[] = {
{.compatible = "qcom,sharedmem-uio",},
{},
};
MODULE_DEVICE_TABLE(of, msm_sharedmem_of_match);
static struct platform_driver msm_sharedmem_driver = {
.probe = msm_sharedmem_probe,
.remove = msm_sharedmem_remove,
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = msm_sharedmem_of_match,
},
};
module_platform_driver(msm_sharedmem_driver);
MODULE_LICENSE("GPL v2");
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