blob: e599b00c05a823f788ce5c36e17f740cdb06e91d [file] [log] [blame]
Rob Herring69154d02012-06-11 21:32:14 -05001/*
2 * Copyright 2011-2012 Calxeda, Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16#include <linux/types.h>
17#include <linux/kernel.h>
18#include <linux/ctype.h>
19#include <linux/edac.h>
20#include <linux/interrupt.h>
21#include <linux/platform_device.h>
22#include <linux/of_platform.h>
23
24#include "edac_core.h"
25#include "edac_module.h"
26
27#define SR_CLR_SB_ECC_INTR 0x0
28#define SR_CLR_DB_ECC_INTR 0x4
29
30struct hb_l2_drvdata {
31 void __iomem *base;
32 int sb_irq;
33 int db_irq;
34};
35
36static irqreturn_t highbank_l2_err_handler(int irq, void *dev_id)
37{
38 struct edac_device_ctl_info *dci = dev_id;
39 struct hb_l2_drvdata *drvdata = dci->pvt_info;
40
41 if (irq == drvdata->sb_irq) {
42 writel(1, drvdata->base + SR_CLR_SB_ECC_INTR);
43 edac_device_handle_ce(dci, 0, 0, dci->ctl_name);
44 }
45 if (irq == drvdata->db_irq) {
46 writel(1, drvdata->base + SR_CLR_DB_ECC_INTR);
47 edac_device_handle_ue(dci, 0, 0, dci->ctl_name);
48 }
49
50 return IRQ_HANDLED;
51}
52
53static int __devinit highbank_l2_err_probe(struct platform_device *pdev)
54{
55 struct edac_device_ctl_info *dci;
56 struct hb_l2_drvdata *drvdata;
57 struct resource *r;
58 int res = 0;
59
60 dci = edac_device_alloc_ctl_info(sizeof(*drvdata), "cpu",
61 1, "L", 1, 2, NULL, 0, 0);
62 if (!dci)
63 return -ENOMEM;
64
65 drvdata = dci->pvt_info;
66 dci->dev = &pdev->dev;
67 platform_set_drvdata(pdev, dci);
68
69 if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL))
70 return -ENOMEM;
71
72 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
73 if (!r) {
74 dev_err(&pdev->dev, "Unable to get mem resource\n");
75 res = -ENODEV;
76 goto err;
77 }
78
79 if (!devm_request_mem_region(&pdev->dev, r->start,
80 resource_size(r), dev_name(&pdev->dev))) {
81 dev_err(&pdev->dev, "Error while requesting mem region\n");
82 res = -EBUSY;
83 goto err;
84 }
85
86 drvdata->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
87 if (!drvdata->base) {
88 dev_err(&pdev->dev, "Unable to map regs\n");
89 res = -ENOMEM;
90 goto err;
91 }
92
93 drvdata->db_irq = platform_get_irq(pdev, 0);
94 res = devm_request_irq(&pdev->dev, drvdata->db_irq,
95 highbank_l2_err_handler,
96 0, dev_name(&pdev->dev), dci);
97 if (res < 0)
98 goto err;
99
100 drvdata->sb_irq = platform_get_irq(pdev, 1);
101 res = devm_request_irq(&pdev->dev, drvdata->sb_irq,
102 highbank_l2_err_handler,
103 0, dev_name(&pdev->dev), dci);
104 if (res < 0)
105 goto err;
106
107 dci->mod_name = dev_name(&pdev->dev);
108 dci->dev_name = dev_name(&pdev->dev);
109
110 if (edac_device_add_device(dci))
111 goto err;
112
113 devres_close_group(&pdev->dev, NULL);
114 return 0;
115err:
116 devres_release_group(&pdev->dev, NULL);
117 edac_device_free_ctl_info(dci);
118 return res;
119}
120
121static int highbank_l2_err_remove(struct platform_device *pdev)
122{
123 struct edac_device_ctl_info *dci = platform_get_drvdata(pdev);
124
125 edac_device_del_device(&pdev->dev);
126 edac_device_free_ctl_info(dci);
127 return 0;
128}
129
130static const struct of_device_id hb_l2_err_of_match[] = {
131 { .compatible = "calxeda,hb-sregs-l2-ecc", },
132 {},
133};
134MODULE_DEVICE_TABLE(of, hb_l2_err_of_match);
135
136static struct platform_driver highbank_l2_edac_driver = {
137 .probe = highbank_l2_err_probe,
138 .remove = highbank_l2_err_remove,
139 .driver = {
140 .name = "hb_l2_edac",
141 .of_match_table = hb_l2_err_of_match,
142 },
143};
144
145module_platform_driver(highbank_l2_edac_driver);
146
147MODULE_LICENSE("GPL v2");
148MODULE_AUTHOR("Calxeda, Inc.");
149MODULE_DESCRIPTION("EDAC Driver for Calxeda Highbank L2 Cache");