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/*
* platform_msic.c: MSIC platform data initialization file
*
* (C) Copyright 2013 Intel Corporation
* Author: Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@intel.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; version 2
* of the License.
*/
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/scatterlist.h>
#include <linux/init.h>
#include <linux/sfi.h>
#include <linux/mfd/intel_msic.h>
#include <asm/intel_scu_ipc.h>
#include <asm/intel-mid.h>
#include "platform_msic.h"
struct intel_msic_platform_data msic_pdata;
static struct resource msic_resources[] = {
{
.start = INTEL_MSIC_IRQ_PHYS_BASE,
.end = INTEL_MSIC_IRQ_PHYS_BASE + 64 - 1,
.flags = IORESOURCE_MEM,
},
};
static struct platform_device msic_device = {
.name = "intel_msic",
.id = -1,
.dev = {
.platform_data = &msic_pdata,
},
.num_resources = ARRAY_SIZE(msic_resources),
.resource = msic_resources,
};
static int msic_scu_status_change(struct notifier_block *nb,
unsigned long code, void *data)
{
if (code == SCU_DOWN) {
platform_device_unregister(&msic_device);
return 0;
}
return platform_device_register(&msic_device);
}
static int __init msic_init(void)
{
static struct notifier_block msic_scu_notifier = {
.notifier_call = msic_scu_status_change,
};
/*
* We need to be sure that the SCU IPC is ready before MSIC device
* can be registered.
*/
if (intel_mid_has_msic())
intel_scu_notifier_add(&msic_scu_notifier);
return 0;
}
arch_initcall(msic_init);
/*
* msic_generic_platform_data - sets generic platform data for the block
* @info: pointer to the SFI device table entry for this block
* @block: MSIC block
*
* Function sets IRQ number from the SFI table entry for given device to
* the MSIC platform data.
*/
void *msic_generic_platform_data(void *info, enum intel_msic_block block)
{
struct sfi_device_table_entry *entry = info;
BUG_ON(block < 0 || block >= INTEL_MSIC_BLOCK_LAST);
msic_pdata.irq[block] = entry->irq;
return NULL;
}
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