mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
98b773cf7b
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
129 lines
3 KiB
C
129 lines
3 KiB
C
/*
|
|
* IPMMU/IPMMUI
|
|
* Copyright (C) 2012 Hideki EIRAKU
|
|
*
|
|
* 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/err.h>
|
|
#include <linux/export.h>
|
|
#include <linux/io.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_data/sh_ipmmu.h>
|
|
#include "shmobile-ipmmu.h"
|
|
|
|
#define IMCTR1 0x000
|
|
#define IMCTR2 0x004
|
|
#define IMASID 0x010
|
|
#define IMTTBR 0x014
|
|
#define IMTTBCR 0x018
|
|
|
|
#define IMCTR1_TLBEN (1 << 0)
|
|
#define IMCTR1_FLUSH (1 << 1)
|
|
|
|
static void ipmmu_reg_write(struct shmobile_ipmmu *ipmmu, unsigned long reg_off,
|
|
unsigned long data)
|
|
{
|
|
iowrite32(data, ipmmu->ipmmu_base + reg_off);
|
|
}
|
|
|
|
void ipmmu_tlb_flush(struct shmobile_ipmmu *ipmmu)
|
|
{
|
|
if (!ipmmu)
|
|
return;
|
|
|
|
spin_lock(&ipmmu->flush_lock);
|
|
if (ipmmu->tlb_enabled)
|
|
ipmmu_reg_write(ipmmu, IMCTR1, IMCTR1_FLUSH | IMCTR1_TLBEN);
|
|
else
|
|
ipmmu_reg_write(ipmmu, IMCTR1, IMCTR1_FLUSH);
|
|
spin_unlock(&ipmmu->flush_lock);
|
|
}
|
|
|
|
void ipmmu_tlb_set(struct shmobile_ipmmu *ipmmu, unsigned long phys, int size,
|
|
int asid)
|
|
{
|
|
if (!ipmmu)
|
|
return;
|
|
|
|
spin_lock(&ipmmu->flush_lock);
|
|
switch (size) {
|
|
default:
|
|
ipmmu->tlb_enabled = 0;
|
|
break;
|
|
case 0x2000:
|
|
ipmmu_reg_write(ipmmu, IMTTBCR, 1);
|
|
ipmmu->tlb_enabled = 1;
|
|
break;
|
|
case 0x1000:
|
|
ipmmu_reg_write(ipmmu, IMTTBCR, 2);
|
|
ipmmu->tlb_enabled = 1;
|
|
break;
|
|
case 0x800:
|
|
ipmmu_reg_write(ipmmu, IMTTBCR, 3);
|
|
ipmmu->tlb_enabled = 1;
|
|
break;
|
|
case 0x400:
|
|
ipmmu_reg_write(ipmmu, IMTTBCR, 4);
|
|
ipmmu->tlb_enabled = 1;
|
|
break;
|
|
case 0x200:
|
|
ipmmu_reg_write(ipmmu, IMTTBCR, 5);
|
|
ipmmu->tlb_enabled = 1;
|
|
break;
|
|
case 0x100:
|
|
ipmmu_reg_write(ipmmu, IMTTBCR, 6);
|
|
ipmmu->tlb_enabled = 1;
|
|
break;
|
|
case 0x80:
|
|
ipmmu_reg_write(ipmmu, IMTTBCR, 7);
|
|
ipmmu->tlb_enabled = 1;
|
|
break;
|
|
}
|
|
ipmmu_reg_write(ipmmu, IMTTBR, phys);
|
|
ipmmu_reg_write(ipmmu, IMASID, asid);
|
|
spin_unlock(&ipmmu->flush_lock);
|
|
}
|
|
|
|
static int ipmmu_probe(struct platform_device *pdev)
|
|
{
|
|
struct shmobile_ipmmu *ipmmu;
|
|
struct resource *res;
|
|
struct shmobile_ipmmu_platform_data *pdata = pdev->dev.platform_data;
|
|
|
|
ipmmu = devm_kzalloc(&pdev->dev, sizeof(*ipmmu), GFP_KERNEL);
|
|
if (!ipmmu) {
|
|
dev_err(&pdev->dev, "cannot allocate device data\n");
|
|
return -ENOMEM;
|
|
}
|
|
spin_lock_init(&ipmmu->flush_lock);
|
|
ipmmu->dev = &pdev->dev;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
ipmmu->ipmmu_base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(ipmmu->ipmmu_base))
|
|
return PTR_ERR(ipmmu->ipmmu_base);
|
|
|
|
ipmmu->dev_names = pdata->dev_names;
|
|
ipmmu->num_dev_names = pdata->num_dev_names;
|
|
platform_set_drvdata(pdev, ipmmu);
|
|
ipmmu_reg_write(ipmmu, IMCTR1, 0x0); /* disable TLB */
|
|
ipmmu_reg_write(ipmmu, IMCTR2, 0x0); /* disable PMB */
|
|
return ipmmu_iommu_init(ipmmu);
|
|
}
|
|
|
|
static struct platform_driver ipmmu_driver = {
|
|
.probe = ipmmu_probe,
|
|
.driver = {
|
|
.name = "ipmmu",
|
|
},
|
|
};
|
|
|
|
static int __init ipmmu_init(void)
|
|
{
|
|
return platform_driver_register(&ipmmu_driver);
|
|
}
|
|
subsys_initcall(ipmmu_init);
|