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1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2009 Wind River Systems, | |
7 | * written by Ralf Baechle <ralf@linux-mips.org> | |
8 | */ | |
9 | #include <linux/module.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/io.h> | |
13 | #include <linux/edac.h> | |
14 | ||
15 | #include <asm/octeon/cvmx.h> | |
16 | ||
17 | #include "edac_core.h" | |
18 | #include "edac_module.h" | |
19 | ||
20 | #define EDAC_MOD_STR "octeon-l2c" | |
21 | ||
22 | static void co_l2c_poll(struct edac_device_ctl_info *l2c) | |
23 | { | |
24 | union cvmx_l2t_err l2t_err; | |
25 | ||
26 | l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR); | |
27 | if (l2t_err.s.sec_err) { | |
28 | edac_device_handle_ce(l2c, 0, 0, | |
29 | "Single bit error (corrected)"); | |
30 | l2t_err.s.sec_err = 1; /* Reset */ | |
31 | cvmx_write_csr(CVMX_L2T_ERR, l2t_err.u64); | |
32 | } | |
33 | if (l2t_err.s.ded_err) { | |
34 | edac_device_handle_ue(l2c, 0, 0, | |
35 | "Double bit error (corrected)"); | |
36 | l2t_err.s.ded_err = 1; /* Reset */ | |
37 | cvmx_write_csr(CVMX_L2T_ERR, l2t_err.u64); | |
38 | } | |
39 | } | |
40 | ||
41 | static int __devinit co_l2c_probe(struct platform_device *pdev) | |
42 | { | |
43 | struct edac_device_ctl_info *l2c; | |
44 | union cvmx_l2t_err l2t_err; | |
45 | int res = 0; | |
46 | ||
47 | l2c = edac_device_alloc_ctl_info(0, "l2c", 1, NULL, 0, 0, | |
48 | NULL, 0, edac_device_alloc_index()); | |
49 | if (!l2c) | |
50 | return -ENOMEM; | |
51 | ||
52 | l2c->dev = &pdev->dev; | |
53 | platform_set_drvdata(pdev, l2c); | |
54 | l2c->dev_name = dev_name(&pdev->dev); | |
55 | ||
56 | l2c->mod_name = "octeon-l2c"; | |
57 | l2c->ctl_name = "octeon_l2c_err"; | |
58 | l2c->edac_check = co_l2c_poll; | |
59 | ||
60 | if (edac_device_add_device(l2c) > 0) { | |
61 | pr_err("%s: edac_device_add_device() failed\n", __func__); | |
62 | goto err; | |
63 | } | |
64 | ||
65 | l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR); | |
66 | l2t_err.s.sec_intena = 0; /* We poll */ | |
67 | l2t_err.s.ded_intena = 0; | |
68 | l2t_err.s.sec_err = 1; /* Clear, just in case */ | |
69 | l2t_err.s.ded_err = 1; | |
70 | cvmx_write_csr(CVMX_L2T_ERR, l2t_err.u64); | |
71 | ||
72 | return 0; | |
73 | ||
74 | err: | |
75 | edac_device_free_ctl_info(l2c); | |
76 | ||
77 | return res; | |
78 | } | |
79 | ||
80 | static int co_l2c_remove(struct platform_device *pdev) | |
81 | { | |
82 | struct edac_device_ctl_info *l2c = platform_get_drvdata(pdev); | |
83 | ||
84 | edac_device_del_device(&pdev->dev); | |
85 | edac_device_free_ctl_info(l2c); | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
90 | static struct platform_driver co_l2c_driver = { | |
91 | .probe = co_l2c_probe, | |
92 | .remove = co_l2c_remove, | |
93 | .driver = { | |
94 | .name = "co_l2c_edac", | |
95 | } | |
96 | }; | |
97 | ||
98 | static int __init co_edac_init(void) | |
99 | { | |
100 | int ret; | |
101 | ||
102 | ret = platform_driver_register(&co_l2c_driver); | |
103 | if (ret) | |
104 | pr_warning(EDAC_MOD_STR " EDAC failed to register\n"); | |
105 | ||
106 | return ret; | |
107 | } | |
108 | ||
109 | static void __exit co_edac_exit(void) | |
110 | { | |
111 | platform_driver_unregister(&co_l2c_driver); | |
112 | } | |
113 | ||
114 | module_init(co_edac_init); | |
115 | module_exit(co_edac_exit); | |
116 | ||
117 | MODULE_LICENSE("GPL"); | |
118 | MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>"); |