155 lines
4.0 KiB
C
155 lines
4.0 KiB
C
/*
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* Copyright 2011-2012 Calxeda, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/ctype.h>
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#include <linux/edac.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/of_platform.h>
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#include "edac_core.h"
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#include "edac_module.h"
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#define SR_CLR_SB_ECC_INTR 0x0
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#define SR_CLR_DB_ECC_INTR 0x4
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struct hb_l2_drvdata {
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void __iomem *base;
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int sb_irq;
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int db_irq;
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};
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static irqreturn_t highbank_l2_err_handler(int irq, void *dev_id)
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{
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struct edac_device_ctl_info *dci = dev_id;
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struct hb_l2_drvdata *drvdata = dci->pvt_info;
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if (irq == drvdata->sb_irq) {
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writel(1, drvdata->base + SR_CLR_SB_ECC_INTR);
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edac_device_handle_ce(dci, 0, 0, dci->ctl_name);
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}
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if (irq == drvdata->db_irq) {
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writel(1, drvdata->base + SR_CLR_DB_ECC_INTR);
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edac_device_handle_ue(dci, 0, 0, dci->ctl_name);
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}
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return IRQ_HANDLED;
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}
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static const struct of_device_id hb_l2_err_of_match[] = {
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{ .compatible = "calxeda,hb-sregs-l2-ecc", },
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{},
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};
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MODULE_DEVICE_TABLE(of, hb_l2_err_of_match);
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static int highbank_l2_err_probe(struct platform_device *pdev)
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{
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const struct of_device_id *id;
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struct edac_device_ctl_info *dci;
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struct hb_l2_drvdata *drvdata;
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struct resource *r;
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int res = 0;
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dci = edac_device_alloc_ctl_info(sizeof(*drvdata), "cpu",
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1, "L", 1, 2, NULL, 0, 0);
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if (!dci)
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return -ENOMEM;
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drvdata = dci->pvt_info;
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dci->dev = &pdev->dev;
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platform_set_drvdata(pdev, dci);
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if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL))
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return -ENOMEM;
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r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!r) {
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dev_err(&pdev->dev, "Unable to get mem resource\n");
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res = -ENODEV;
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goto err;
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}
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if (!devm_request_mem_region(&pdev->dev, r->start,
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resource_size(r), dev_name(&pdev->dev))) {
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dev_err(&pdev->dev, "Error while requesting mem region\n");
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res = -EBUSY;
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goto err;
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}
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drvdata->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
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if (!drvdata->base) {
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dev_err(&pdev->dev, "Unable to map regs\n");
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res = -ENOMEM;
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goto err;
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}
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id = of_match_device(hb_l2_err_of_match, &pdev->dev);
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dci->mod_name = pdev->dev.driver->name;
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dci->ctl_name = id ? id->compatible : "unknown";
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dci->dev_name = dev_name(&pdev->dev);
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if (edac_device_add_device(dci))
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goto err;
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drvdata->db_irq = platform_get_irq(pdev, 0);
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res = devm_request_irq(&pdev->dev, drvdata->db_irq,
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highbank_l2_err_handler,
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0, dev_name(&pdev->dev), dci);
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if (res < 0)
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goto err2;
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drvdata->sb_irq = platform_get_irq(pdev, 1);
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res = devm_request_irq(&pdev->dev, drvdata->sb_irq,
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highbank_l2_err_handler,
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0, dev_name(&pdev->dev), dci);
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if (res < 0)
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goto err2;
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devres_close_group(&pdev->dev, NULL);
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return 0;
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err2:
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edac_device_del_device(&pdev->dev);
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err:
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devres_release_group(&pdev->dev, NULL);
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edac_device_free_ctl_info(dci);
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return res;
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}
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static int highbank_l2_err_remove(struct platform_device *pdev)
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{
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struct edac_device_ctl_info *dci = platform_get_drvdata(pdev);
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edac_device_del_device(&pdev->dev);
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edac_device_free_ctl_info(dci);
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return 0;
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}
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static struct platform_driver highbank_l2_edac_driver = {
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.probe = highbank_l2_err_probe,
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.remove = highbank_l2_err_remove,
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.driver = {
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.name = "hb_l2_edac",
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.of_match_table = hb_l2_err_of_match,
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},
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};
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module_platform_driver(highbank_l2_edac_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Calxeda, Inc.");
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MODULE_DESCRIPTION("EDAC Driver for Calxeda Highbank L2 Cache");
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