151 lines
3.6 KiB
C
151 lines
3.6 KiB
C
/*
|
|
* omap-ocp2scp.c - transform ocp interface protocol to scp protocol
|
|
*
|
|
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Author: Kishon Vijay Abraham I <kishon@ti.com>
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/err.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/platform_data/omap_ocp2scp.h>
|
|
|
|
/**
|
|
* _count_resources - count for the number of resources
|
|
* @res: struct resource *
|
|
*
|
|
* Count and return the number of resources populated for the device that is
|
|
* connected to ocp2scp.
|
|
*/
|
|
static unsigned _count_resources(struct resource *res)
|
|
{
|
|
int cnt = 0;
|
|
|
|
while (res->start != res->end) {
|
|
cnt++;
|
|
res++;
|
|
}
|
|
|
|
return cnt;
|
|
}
|
|
|
|
static int ocp2scp_remove_devices(struct device *dev, void *c)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
|
|
platform_device_unregister(pdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_ocp2scp_probe(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
unsigned res_cnt, i;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct platform_device *pdev_child;
|
|
struct omap_ocp2scp_platform_data *pdata = pdev->dev.platform_data;
|
|
struct omap_ocp2scp_dev *dev;
|
|
|
|
if (np) {
|
|
ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev,
|
|
"failed to add resources for ocp2scp child\n");
|
|
goto err0;
|
|
}
|
|
} else if (pdata) {
|
|
for (i = 0, dev = *pdata->devices; i < pdata->dev_cnt; i++,
|
|
dev++) {
|
|
res_cnt = _count_resources(dev->res);
|
|
|
|
pdev_child = platform_device_alloc(dev->drv_name,
|
|
PLATFORM_DEVID_AUTO);
|
|
if (!pdev_child) {
|
|
dev_err(&pdev->dev,
|
|
"failed to allocate mem for ocp2scp child\n");
|
|
goto err0;
|
|
}
|
|
|
|
ret = platform_device_add_resources(pdev_child,
|
|
dev->res, res_cnt);
|
|
if (ret) {
|
|
dev_err(&pdev->dev,
|
|
"failed to add resources for ocp2scp child\n");
|
|
goto err1;
|
|
}
|
|
|
|
pdev_child->dev.parent = &pdev->dev;
|
|
|
|
ret = platform_device_add(pdev_child);
|
|
if (ret) {
|
|
dev_err(&pdev->dev,
|
|
"failed to register ocp2scp child device\n");
|
|
goto err1;
|
|
}
|
|
}
|
|
} else {
|
|
dev_err(&pdev->dev, "OCP2SCP initialized without plat data\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pm_runtime_enable(&pdev->dev);
|
|
|
|
return 0;
|
|
|
|
err1:
|
|
platform_device_put(pdev_child);
|
|
|
|
err0:
|
|
device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int omap_ocp2scp_remove(struct platform_device *pdev)
|
|
{
|
|
pm_runtime_disable(&pdev->dev);
|
|
device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id omap_ocp2scp_id_table[] = {
|
|
{ .compatible = "ti,omap-ocp2scp" },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, omap_ocp2scp_id_table);
|
|
#endif
|
|
|
|
static struct platform_driver omap_ocp2scp_driver = {
|
|
.probe = omap_ocp2scp_probe,
|
|
.remove = omap_ocp2scp_remove,
|
|
.driver = {
|
|
.name = "omap-ocp2scp",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = of_match_ptr(omap_ocp2scp_id_table),
|
|
},
|
|
};
|
|
|
|
module_platform_driver(omap_ocp2scp_driver);
|
|
|
|
MODULE_ALIAS("platform: omap-ocp2scp");
|
|
MODULE_AUTHOR("Texas Instruments Inc.");
|
|
MODULE_DESCRIPTION("OMAP OCP2SCP driver");
|
|
MODULE_LICENSE("GPL v2");
|