163 lines
3.5 KiB
C
163 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* MEN Chameleon Bus.
|
|
*
|
|
* Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
|
|
* Author: Andreas Werner <andreas.werner@men.de>
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/dmi.h>
|
|
#include <linux/mcb.h>
|
|
#include <linux/io.h>
|
|
#include "mcb-internal.h"
|
|
|
|
struct priv {
|
|
struct mcb_bus *bus;
|
|
struct resource *mem;
|
|
void __iomem *base;
|
|
};
|
|
|
|
static int mcb_lpc_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *res;
|
|
struct priv *priv;
|
|
int ret = 0;
|
|
|
|
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
priv->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!priv->mem) {
|
|
dev_err(&pdev->dev, "No Memory resource\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
res = devm_request_mem_region(&pdev->dev, priv->mem->start,
|
|
resource_size(priv->mem),
|
|
KBUILD_MODNAME);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "Failed to request IO memory\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
priv->base = devm_ioremap(&pdev->dev, priv->mem->start,
|
|
resource_size(priv->mem));
|
|
if (!priv->base) {
|
|
dev_err(&pdev->dev, "Cannot ioremap\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, priv);
|
|
|
|
priv->bus = mcb_alloc_bus(&pdev->dev);
|
|
if (IS_ERR(priv->bus))
|
|
return PTR_ERR(priv->bus);
|
|
|
|
ret = chameleon_parse_cells(priv->bus, priv->mem->start, priv->base);
|
|
if (ret < 0) {
|
|
mcb_release_bus(priv->bus);
|
|
return ret;
|
|
}
|
|
|
|
dev_dbg(&pdev->dev, "Found %d cells\n", ret);
|
|
|
|
mcb_bus_add_devices(priv->bus);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
static int mcb_lpc_remove(struct platform_device *pdev)
|
|
{
|
|
struct priv *priv = platform_get_drvdata(pdev);
|
|
|
|
mcb_release_bus(priv->bus);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_device *mcb_lpc_pdev;
|
|
|
|
static int mcb_lpc_create_platform_device(const struct dmi_system_id *id)
|
|
{
|
|
struct resource *res = id->driver_data;
|
|
int ret;
|
|
|
|
mcb_lpc_pdev = platform_device_alloc("mcb-lpc", -1);
|
|
if (!mcb_lpc_pdev)
|
|
return -ENOMEM;
|
|
|
|
ret = platform_device_add_resources(mcb_lpc_pdev, res, 1);
|
|
if (ret)
|
|
goto out_put;
|
|
|
|
ret = platform_device_add(mcb_lpc_pdev);
|
|
if (ret)
|
|
goto out_put;
|
|
|
|
return 0;
|
|
|
|
out_put:
|
|
platform_device_put(mcb_lpc_pdev);
|
|
return ret;
|
|
}
|
|
|
|
static struct resource sc24_fpga_resource = DEFINE_RES_MEM(0xe000e000, CHAM_HEADER_SIZE);
|
|
static struct resource sc31_fpga_resource = DEFINE_RES_MEM(0xf000e000, CHAM_HEADER_SIZE);
|
|
|
|
static struct platform_driver mcb_lpc_driver = {
|
|
.driver = {
|
|
.name = "mcb-lpc",
|
|
},
|
|
.probe = mcb_lpc_probe,
|
|
.remove = mcb_lpc_remove,
|
|
};
|
|
|
|
static const struct dmi_system_id mcb_lpc_dmi_table[] = {
|
|
{
|
|
.ident = "SC24",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "MEN"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "14SC24"),
|
|
},
|
|
.driver_data = (void *)&sc24_fpga_resource,
|
|
.callback = mcb_lpc_create_platform_device,
|
|
},
|
|
{
|
|
.ident = "SC31",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "MEN"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "14SC31"),
|
|
},
|
|
.driver_data = (void *)&sc31_fpga_resource,
|
|
.callback = mcb_lpc_create_platform_device,
|
|
},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(dmi, mcb_lpc_dmi_table);
|
|
|
|
static int __init mcb_lpc_init(void)
|
|
{
|
|
if (!dmi_check_system(mcb_lpc_dmi_table))
|
|
return -ENODEV;
|
|
|
|
return platform_driver_register(&mcb_lpc_driver);
|
|
}
|
|
|
|
static void __exit mcb_lpc_exit(void)
|
|
{
|
|
platform_device_unregister(mcb_lpc_pdev);
|
|
platform_driver_unregister(&mcb_lpc_driver);
|
|
}
|
|
|
|
module_init(mcb_lpc_init);
|
|
module_exit(mcb_lpc_exit);
|
|
|
|
MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("MCB over LPC support");
|
|
MODULE_IMPORT_NS(MCB);
|