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