Commit | Line | Data |
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9952f691 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
69154d06 RH |
2 | /* |
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> | |
408d8088 RH |
10 | #include <linux/of.h> |
11 | #include <linux/of_device.h> | |
69154d06 | 12 | #include <linux/platform_device.h> |
69154d06 | 13 | |
69154d06 RH |
14 | #include "edac_module.h" |
15 | ||
16 | #define SR_CLR_SB_ECC_INTR 0x0 | |
17 | #define SR_CLR_DB_ECC_INTR 0x4 | |
18 | ||
19 | struct hb_l2_drvdata { | |
20 | void __iomem *base; | |
21 | int sb_irq; | |
22 | int db_irq; | |
23 | }; | |
24 | ||
25 | static irqreturn_t highbank_l2_err_handler(int irq, void *dev_id) | |
26 | { | |
27 | struct edac_device_ctl_info *dci = dev_id; | |
28 | struct hb_l2_drvdata *drvdata = dci->pvt_info; | |
29 | ||
30 | if (irq == drvdata->sb_irq) { | |
31 | writel(1, drvdata->base + SR_CLR_SB_ECC_INTR); | |
32 | edac_device_handle_ce(dci, 0, 0, dci->ctl_name); | |
33 | } | |
34 | if (irq == drvdata->db_irq) { | |
35 | writel(1, drvdata->base + SR_CLR_DB_ECC_INTR); | |
36 | edac_device_handle_ue(dci, 0, 0, dci->ctl_name); | |
37 | } | |
38 | ||
39 | return IRQ_HANDLED; | |
40 | } | |
41 | ||
41ec0e8d RR |
42 | static const struct of_device_id hb_l2_err_of_match[] = { |
43 | { .compatible = "calxeda,hb-sregs-l2-ecc", }, | |
44 | {}, | |
45 | }; | |
46 | MODULE_DEVICE_TABLE(of, hb_l2_err_of_match); | |
47 | ||
9b3c6e85 | 48 | static int highbank_l2_err_probe(struct platform_device *pdev) |
69154d06 | 49 | { |
41ec0e8d | 50 | const struct of_device_id *id; |
69154d06 RH |
51 | struct edac_device_ctl_info *dci; |
52 | struct hb_l2_drvdata *drvdata; | |
53 | struct resource *r; | |
54 | int res = 0; | |
55 | ||
56 | dci = edac_device_alloc_ctl_info(sizeof(*drvdata), "cpu", | |
57 | 1, "L", 1, 2, NULL, 0, 0); | |
58 | if (!dci) | |
59 | return -ENOMEM; | |
60 | ||
61 | drvdata = dci->pvt_info; | |
62 | dci->dev = &pdev->dev; | |
63 | platform_set_drvdata(pdev, dci); | |
64 | ||
65 | if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) | |
66 | return -ENOMEM; | |
67 | ||
68 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
69 | if (!r) { | |
70 | dev_err(&pdev->dev, "Unable to get mem resource\n"); | |
71 | res = -ENODEV; | |
72 | goto err; | |
73 | } | |
74 | ||
75 | if (!devm_request_mem_region(&pdev->dev, r->start, | |
76 | resource_size(r), dev_name(&pdev->dev))) { | |
77 | dev_err(&pdev->dev, "Error while requesting mem region\n"); | |
78 | res = -EBUSY; | |
79 | goto err; | |
80 | } | |
81 | ||
82 | drvdata->base = devm_ioremap(&pdev->dev, r->start, resource_size(r)); | |
83 | if (!drvdata->base) { | |
84 | dev_err(&pdev->dev, "Unable to map regs\n"); | |
85 | res = -ENOMEM; | |
86 | goto err; | |
87 | } | |
88 | ||
41ec0e8d RR |
89 | id = of_match_device(hb_l2_err_of_match, &pdev->dev); |
90 | dci->mod_name = pdev->dev.driver->name; | |
91 | dci->ctl_name = id ? id->compatible : "unknown"; | |
a72b8859 RR |
92 | dci->dev_name = dev_name(&pdev->dev); |
93 | ||
94 | if (edac_device_add_device(dci)) | |
95 | goto err; | |
96 | ||
69154d06 RH |
97 | drvdata->db_irq = platform_get_irq(pdev, 0); |
98 | res = devm_request_irq(&pdev->dev, drvdata->db_irq, | |
99 | highbank_l2_err_handler, | |
100 | 0, dev_name(&pdev->dev), dci); | |
101 | if (res < 0) | |
a72b8859 | 102 | goto err2; |
69154d06 RH |
103 | |
104 | drvdata->sb_irq = platform_get_irq(pdev, 1); | |
105 | res = devm_request_irq(&pdev->dev, drvdata->sb_irq, | |
106 | highbank_l2_err_handler, | |
107 | 0, dev_name(&pdev->dev), dci); | |
108 | if (res < 0) | |
a72b8859 | 109 | goto err2; |
69154d06 RH |
110 | |
111 | devres_close_group(&pdev->dev, NULL); | |
112 | return 0; | |
a72b8859 RR |
113 | err2: |
114 | edac_device_del_device(&pdev->dev); | |
69154d06 RH |
115 | err: |
116 | devres_release_group(&pdev->dev, NULL); | |
117 | edac_device_free_ctl_info(dci); | |
118 | return res; | |
119 | } | |
120 | ||
7aca2e9b | 121 | static void highbank_l2_err_remove(struct platform_device *pdev) |
69154d06 RH |
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); | |
69154d06 RH |
127 | } |
128 | ||
69154d06 RH |
129 | static struct platform_driver highbank_l2_edac_driver = { |
130 | .probe = highbank_l2_err_probe, | |
7aca2e9b | 131 | .remove_new = highbank_l2_err_remove, |
69154d06 RH |
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"); |