[mirror_ubuntu-eoan-kernel.git] / drivers / edac / highbank_l2_edac.c

// 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/platform_device.h>
#include <linux/of_platform.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");
Commit	Line	Data
9952f691	1	// SPDX-License-Identifier: GPL-2.0-only
69154d06 RH	2	/*
69154d06 RH	3	* Copyright 2011-2012 Calxeda, Inc.
69154d06 RH	4	*/
	5	#include <linux/types.h>
	6	#include <linux/kernel.h>
	7	#include <linux/ctype.h>
	8	#include <linux/edac.h>
	9	#include <linux/interrupt.h>
	10	#include <linux/platform_device.h>
	11	#include <linux/of_platform.h>
	12
69154d06 RH	13	#include "edac_module.h"
	14
	15	#define SR_CLR_SB_ECC_INTR 0x0
	16	#define SR_CLR_DB_ECC_INTR 0x4
	17
	18	struct hb_l2_drvdata {
	19	void __iomem *base;
	20	int sb_irq;
	21	int db_irq;
	22	};
	23
	24	static irqreturn_t highbank_l2_err_handler(int irq, void *dev_id)
	25	{
	26	struct edac_device_ctl_info *dci = dev_id;
	27	struct hb_l2_drvdata *drvdata = dci->pvt_info;
	28
	29	if (irq == drvdata->sb_irq) {
	30	writel(1, drvdata->base + SR_CLR_SB_ECC_INTR);
	31	edac_device_handle_ce(dci, 0, 0, dci->ctl_name);
	32	}
	33	if (irq == drvdata->db_irq) {
	34	writel(1, drvdata->base + SR_CLR_DB_ECC_INTR);
	35	edac_device_handle_ue(dci, 0, 0, dci->ctl_name);
	36	}
	37
	38	return IRQ_HANDLED;
	39	}
	40
41ec0e8d RR	41	static const struct of_device_id hb_l2_err_of_match[] = {
	42	{ .compatible = "calxeda,hb-sregs-l2-ecc", },
	43	{},
	44	};
	45	MODULE_DEVICE_TABLE(of, hb_l2_err_of_match);
	46
9b3c6e85	47	static int highbank_l2_err_probe(struct platform_device *pdev)
69154d06	48	{
41ec0e8d	49	const struct of_device_id *id;
69154d06 RH	50	struct edac_device_ctl_info *dci;
	51	struct hb_l2_drvdata *drvdata;
	52	struct resource *r;
	53	int res = 0;
	54
	55	dci = edac_device_alloc_ctl_info(sizeof(*drvdata), "cpu",
	56	1, "L", 1, 2, NULL, 0, 0);
	57	if (!dci)
	58	return -ENOMEM;
	59
	60	drvdata = dci->pvt_info;
	61	dci->dev = &pdev->dev;
	62	platform_set_drvdata(pdev, dci);
	63
	64	if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL))
	65	return -ENOMEM;
	66
	67	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	68	if (!r) {
	69	dev_err(&pdev->dev, "Unable to get mem resource\n");
	70	res = -ENODEV;
	71	goto err;
	72	}
	73
	74	if (!devm_request_mem_region(&pdev->dev, r->start,
	75	resource_size(r), dev_name(&pdev->dev))) {
	76	dev_err(&pdev->dev, "Error while requesting mem region\n");
	77	res = -EBUSY;
	78	goto err;
	79	}
	80
	81	drvdata->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
	82	if (!drvdata->base) {
	83	dev_err(&pdev->dev, "Unable to map regs\n");
	84	res = -ENOMEM;
	85	goto err;
	86	}
	87
41ec0e8d RR	88	id = of_match_device(hb_l2_err_of_match, &pdev->dev);
	89	dci->mod_name = pdev->dev.driver->name;
	90	dci->ctl_name = id ? id->compatible : "unknown";
a72b8859 RR	91	dci->dev_name = dev_name(&pdev->dev);
	92
	93	if (edac_device_add_device(dci))
	94	goto err;
	95
69154d06 RH	96	drvdata->db_irq = platform_get_irq(pdev, 0);
	97	res = devm_request_irq(&pdev->dev, drvdata->db_irq,
	98	highbank_l2_err_handler,
	99	0, dev_name(&pdev->dev), dci);
	100	if (res < 0)
a72b8859	101	goto err2;
69154d06 RH	102
	103	drvdata->sb_irq = platform_get_irq(pdev, 1);
	104	res = devm_request_irq(&pdev->dev, drvdata->sb_irq,
	105	highbank_l2_err_handler,
	106	0, dev_name(&pdev->dev), dci);
	107	if (res < 0)
a72b8859	108	goto err2;
69154d06 RH	109
	110	devres_close_group(&pdev->dev, NULL);
	111	return 0;
a72b8859 RR	112	err2:
a72b8859 RR	113	edac_device_del_device(&pdev->dev);
69154d06 RH	114	err:
	115	devres_release_group(&pdev->dev, NULL);
	116	edac_device_free_ctl_info(dci);
	117	return res;
	118	}
	119
	120	static int highbank_l2_err_remove(struct platform_device *pdev)
	121	{
	122	struct edac_device_ctl_info *dci = platform_get_drvdata(pdev);
	123
	124	edac_device_del_device(&pdev->dev);
	125	edac_device_free_ctl_info(dci);
	126	return 0;
	127	}
	128
69154d06 RH	129	static struct platform_driver highbank_l2_edac_driver = {
	130	.probe = highbank_l2_err_probe,
	131	.remove = highbank_l2_err_remove,
	132	.driver = {
	133	.name = "hb_l2_edac",
	134	.of_match_table = hb_l2_err_of_match,
	135	},
	136	};
	137
	138	module_platform_driver(highbank_l2_edac_driver);
	139
	140	MODULE_LICENSE("GPL v2");
	141	MODULE_AUTHOR("Calxeda, Inc.");
	142	MODULE_DESCRIPTION("EDAC Driver for Calxeda Highbank L2 Cache");