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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2011-2012 Calxeda, Inc.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/ctype.h>
#include <linux/edac.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include "edac_module.h"
#define SR_CLR_SB_ECC_INTR 0x0
#define SR_CLR_DB_ECC_INTR 0x4
struct hb_l2_drvdata {
void __iomem *base;
int sb_irq;
int db_irq;
};
static irqreturn_t highbank_l2_err_handler(int irq, void *dev_id)
{
struct edac_device_ctl_info *dci = dev_id;
struct hb_l2_drvdata *drvdata = dci->pvt_info;
if (irq == drvdata->sb_irq) {
writel(1, drvdata->base + SR_CLR_SB_ECC_INTR);
edac_device_handle_ce(dci, 0, 0, dci->ctl_name);
}
if (irq == drvdata->db_irq) {
writel(1, drvdata->base + SR_CLR_DB_ECC_INTR);
edac_device_handle_ue(dci, 0, 0, dci->ctl_name);
}
return IRQ_HANDLED;
}
static const struct of_device_id hb_l2_err_of_match[] = {
{ .compatible = "calxeda,hb-sregs-l2-ecc", },
{},
};
MODULE_DEVICE_TABLE(of, hb_l2_err_of_match);
static int highbank_l2_err_probe(struct platform_device *pdev)
{
const struct of_device_id *id;
struct edac_device_ctl_info *dci;
struct hb_l2_drvdata *drvdata;
struct resource *r;
int res = 0;
dci = edac_device_alloc_ctl_info(sizeof(*drvdata), "cpu",
1, "L", 1, 2, NULL, 0, 0);
if (!dci)
return -ENOMEM;
drvdata = dci->pvt_info;
dci->dev = &pdev->dev;
platform_set_drvdata(pdev, dci);
if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL))
return -ENOMEM;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r) {
dev_err(&pdev->dev, "Unable to get mem resource\n");
res = -ENODEV;
goto err;
}
if (!devm_request_mem_region(&pdev->dev, r->start,
resource_size(r), dev_name(&pdev->dev))) {
dev_err(&pdev->dev, "Error while requesting mem region\n");
res = -EBUSY;
goto err;
}
drvdata->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
if (!drvdata->base) {
dev_err(&pdev->dev, "Unable to map regs\n");
res = -ENOMEM;
goto err;
}
id = of_match_device(hb_l2_err_of_match, &pdev->dev);
dci->mod_name = pdev->dev.driver->name;
dci->ctl_name = id ? id->compatible : "unknown";
dci->dev_name = dev_name(&pdev->dev);
if (edac_device_add_device(dci))
goto err;
drvdata->db_irq = platform_get_irq(pdev, 0);
res = devm_request_irq(&pdev->dev, drvdata->db_irq,
highbank_l2_err_handler,
0, dev_name(&pdev->dev), dci);
if (res < 0)
goto err2;
drvdata->sb_irq = platform_get_irq(pdev, 1);
res = devm_request_irq(&pdev->dev, drvdata->sb_irq,
highbank_l2_err_handler,
0, dev_name(&pdev->dev), dci);
if (res < 0)
goto err2;
devres_close_group(&pdev->dev, NULL);
return 0;
err2:
edac_device_del_device(&pdev->dev);
err:
devres_release_group(&pdev->dev, NULL);
edac_device_free_ctl_info(dci);
return res;
}
static int highbank_l2_err_remove(struct platform_device *pdev)
{
struct edac_device_ctl_info *dci = platform_get_drvdata(pdev);
edac_device_del_device(&pdev->dev);
edac_device_free_ctl_info(dci);
return 0;
}
static struct platform_driver highbank_l2_edac_driver = {
.probe = highbank_l2_err_probe,
.remove = highbank_l2_err_remove,
.driver = {
.name = "hb_l2_edac",
.of_match_table = hb_l2_err_of_match,
},
};
module_platform_driver(highbank_l2_edac_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Calxeda, Inc.");
MODULE_DESCRIPTION("EDAC Driver for Calxeda Highbank L2 Cache");
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