| /* |
| * Copyright 2011-2012 Calxeda, Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| #include <linux/types.h> |
| #include <linux/kernel.h> |
| #include <linux/ctype.h> |
| #include <linux/edac.h> |
| #include <linux/interrupt.h> |
| #include <linux/platform_device.h> |
| #include <linux/of_platform.h> |
| |
| #include "edac_core.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 int highbank_l2_err_probe(struct platform_device *pdev) |
| { |
| 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; |
| } |
| |
| dci->mod_name = dev_name(&pdev->dev); |
| 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 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 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"); |