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69154d06 RH |
1 | /* |
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 | ||
30 | struct hb_l2_drvdata { | |
31 | void __iomem *base; | |
32 | int sb_irq; | |
33 | int db_irq; | |
34 | }; | |
35 | ||
36 | static 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 | ||
9b3c6e85 | 53 | static int highbank_l2_err_probe(struct platform_device *pdev) |
69154d06 RH |
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; | |
115 | err: | |
116 | devres_release_group(&pdev->dev, NULL); | |
117 | edac_device_free_ctl_info(dci); | |
118 | return res; | |
119 | } | |
120 | ||
121 | static 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 | ||
130 | static const struct of_device_id hb_l2_err_of_match[] = { | |
131 | { .compatible = "calxeda,hb-sregs-l2-ecc", }, | |
132 | {}, | |
133 | }; | |
134 | MODULE_DEVICE_TABLE(of, hb_l2_err_of_match); | |
135 | ||
136 | static 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 | ||
145 | module_platform_driver(highbank_l2_edac_driver); | |
146 | ||
147 | MODULE_LICENSE("GPL v2"); | |
148 | MODULE_AUTHOR("Calxeda, Inc."); | |
149 | MODULE_DESCRIPTION("EDAC Driver for Calxeda Highbank L2 Cache"); |