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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 const struct of_device_id hb_l2_err_of_match[] = {
54 { .compatible = "calxeda,hb-sregs-l2-ecc", },
55 {},
56};
57MODULE_DEVICE_TABLE(of, hb_l2_err_of_match);
58
59static int highbank_l2_err_probe(struct platform_device *pdev)
60{
61 const struct of_device_id *id;
62 struct edac_device_ctl_info *dci;
63 struct hb_l2_drvdata *drvdata;
64 struct resource *r;
65 int res = 0;
66
67 dci = edac_device_alloc_ctl_info(sizeof(*drvdata), "cpu",
68 1, "L", 1, 2, NULL, 0, 0);
69 if (!dci)
70 return -ENOMEM;
71
72 drvdata = dci->pvt_info;
73 dci->dev = &pdev->dev;
74 platform_set_drvdata(pdev, dci);
75
76 if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL))
77 return -ENOMEM;
78
79 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
80 if (!r) {
81 dev_err(&pdev->dev, "Unable to get mem resource\n");
82 res = -ENODEV;
83 goto err;
84 }
85
86 if (!devm_request_mem_region(&pdev->dev, r->start,
87 resource_size(r), dev_name(&pdev->dev))) {
88 dev_err(&pdev->dev, "Error while requesting mem region\n");
89 res = -EBUSY;
90 goto err;
91 }
92
93 drvdata->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
94 if (!drvdata->base) {
95 dev_err(&pdev->dev, "Unable to map regs\n");
96 res = -ENOMEM;
97 goto err;
98 }
99
100 id = of_match_device(hb_l2_err_of_match, &pdev->dev);
101 dci->mod_name = pdev->dev.driver->name;
102 dci->ctl_name = id ? id->compatible : "unknown";
103 dci->dev_name = dev_name(&pdev->dev);
104
105 if (edac_device_add_device(dci))
106 goto err;
107
108 drvdata->db_irq = platform_get_irq(pdev, 0);
109 res = devm_request_irq(&pdev->dev, drvdata->db_irq,
110 highbank_l2_err_handler,
111 0, dev_name(&pdev->dev), dci);
112 if (res < 0)
113 goto err2;
114
115 drvdata->sb_irq = platform_get_irq(pdev, 1);
116 res = devm_request_irq(&pdev->dev, drvdata->sb_irq,
117 highbank_l2_err_handler,
118 0, dev_name(&pdev->dev), dci);
119 if (res < 0)
120 goto err2;
121
122 devres_close_group(&pdev->dev, NULL);
123 return 0;
124err2:
125 edac_device_del_device(&pdev->dev);
126err:
127 devres_release_group(&pdev->dev, NULL);
128 edac_device_free_ctl_info(dci);
129 return res;
130}
131
132static int highbank_l2_err_remove(struct platform_device *pdev)
133{
134 struct edac_device_ctl_info *dci = platform_get_drvdata(pdev);
135
136 edac_device_del_device(&pdev->dev);
137 edac_device_free_ctl_info(dci);
138 return 0;
139}
140
141static struct platform_driver highbank_l2_edac_driver = {
142 .probe = highbank_l2_err_probe,
143 .remove = highbank_l2_err_remove,
144 .driver = {
145 .name = "hb_l2_edac",
146 .of_match_table = hb_l2_err_of_match,
147 },
148};
149
150module_platform_driver(highbank_l2_edac_driver);
151
152MODULE_LICENSE("GPL v2");
153MODULE_AUTHOR("Calxeda, Inc.");
154MODULE_DESCRIPTION("EDAC Driver for Calxeda Highbank L2 Cache");
155