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142 lines
3.4 KiB
142 lines
3.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright 2011-2012 Calxeda, Inc. |
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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_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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