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73edc8f7 AW |
1 | /* |
2 | * MEN Chameleon Bus. | |
3 | * | |
4 | * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de) | |
5 | * Author: Andreas Werner <andreas.werner@men.de> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the Free | |
9 | * Software Foundation; version 2 of the License. | |
10 | */ | |
11 | ||
12 | #include <linux/platform_device.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/dmi.h> | |
15 | #include <linux/mcb.h> | |
16 | #include <linux/io.h> | |
17 | #include "mcb-internal.h" | |
18 | ||
19 | struct priv { | |
20 | struct mcb_bus *bus; | |
21 | struct resource *mem; | |
22 | void __iomem *base; | |
23 | }; | |
24 | ||
25 | static int mcb_lpc_probe(struct platform_device *pdev) | |
26 | { | |
27 | struct resource *res; | |
28 | struct priv *priv; | |
29 | int ret = 0; | |
30 | ||
31 | priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); | |
32 | if (!priv) | |
33 | return -ENOMEM; | |
34 | ||
35 | priv->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
36 | if (!priv->mem) { | |
37 | dev_err(&pdev->dev, "No Memory resource\n"); | |
38 | return -ENODEV; | |
39 | } | |
40 | ||
41 | res = devm_request_mem_region(&pdev->dev, priv->mem->start, | |
42 | resource_size(priv->mem), | |
43 | KBUILD_MODNAME); | |
44 | if (!res) { | |
45 | dev_err(&pdev->dev, "Failed to request IO memory\n"); | |
46 | return -EBUSY; | |
47 | } | |
48 | ||
49 | priv->base = devm_ioremap(&pdev->dev, priv->mem->start, | |
50 | resource_size(priv->mem)); | |
51 | if (!priv->base) { | |
52 | dev_err(&pdev->dev, "Cannot ioremap\n"); | |
53 | return -ENOMEM; | |
54 | } | |
55 | ||
56 | platform_set_drvdata(pdev, priv); | |
57 | ||
58 | priv->bus = mcb_alloc_bus(&pdev->dev); | |
59 | if (IS_ERR(priv->bus)) | |
60 | return PTR_ERR(priv->bus); | |
61 | ||
62 | ret = chameleon_parse_cells(priv->bus, priv->mem->start, priv->base); | |
63 | if (ret < 0) { | |
64 | mcb_release_bus(priv->bus); | |
65 | return ret; | |
66 | } | |
67 | ||
68 | dev_dbg(&pdev->dev, "Found %d cells\n", ret); | |
69 | ||
70 | mcb_bus_add_devices(priv->bus); | |
71 | ||
72 | return 0; | |
73 | ||
74 | } | |
75 | ||
76 | static int mcb_lpc_remove(struct platform_device *pdev) | |
77 | { | |
78 | struct priv *priv = platform_get_drvdata(pdev); | |
79 | ||
80 | mcb_release_bus(priv->bus); | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
85 | static struct platform_device *mcb_lpc_pdev; | |
86 | ||
87 | static int mcb_lpc_create_platform_device(const struct dmi_system_id *id) | |
88 | { | |
89 | struct resource *res = id->driver_data; | |
90 | int ret; | |
91 | ||
92 | mcb_lpc_pdev = platform_device_alloc("mcb-lpc", -1); | |
93 | if (!mcb_lpc_pdev) | |
94 | return -ENOMEM; | |
95 | ||
96 | ret = platform_device_add_resources(mcb_lpc_pdev, res, 1); | |
97 | if (ret) | |
98 | goto out_put; | |
99 | ||
100 | ret = platform_device_add(mcb_lpc_pdev); | |
101 | if (ret) | |
102 | goto out_put; | |
103 | ||
104 | return 0; | |
105 | ||
106 | out_put: | |
107 | platform_device_put(mcb_lpc_pdev); | |
108 | return ret; | |
109 | } | |
110 | ||
111 | static struct resource sc24_fpga_resource = { | |
112 | .start = 0xe000e000, | |
113 | .end = 0xe000e000 + CHAM_HEADER_SIZE, | |
114 | .flags = IORESOURCE_MEM, | |
115 | }; | |
116 | ||
acf5e051 MM |
117 | static struct resource sc31_fpga_resource = { |
118 | .start = 0xf000e000, | |
119 | .end = 0xf000e000 + CHAM_HEADER_SIZE, | |
120 | .flags = IORESOURCE_MEM, | |
121 | }; | |
122 | ||
73edc8f7 AW |
123 | static struct platform_driver mcb_lpc_driver = { |
124 | .driver = { | |
125 | .name = "mcb-lpc", | |
126 | }, | |
127 | .probe = mcb_lpc_probe, | |
128 | .remove = mcb_lpc_remove, | |
129 | }; | |
130 | ||
131 | static const struct dmi_system_id mcb_lpc_dmi_table[] = { | |
132 | { | |
133 | .ident = "SC24", | |
134 | .matches = { | |
135 | DMI_MATCH(DMI_SYS_VENDOR, "MEN"), | |
136 | DMI_MATCH(DMI_PRODUCT_VERSION, "14SC24"), | |
137 | }, | |
138 | .driver_data = (void *)&sc24_fpga_resource, | |
139 | .callback = mcb_lpc_create_platform_device, | |
140 | }, | |
acf5e051 MM |
141 | { |
142 | .ident = "SC31", | |
143 | .matches = { | |
144 | DMI_MATCH(DMI_SYS_VENDOR, "MEN"), | |
145 | DMI_MATCH(DMI_PRODUCT_VERSION, "14SC31"), | |
146 | }, | |
147 | .driver_data = (void *)&sc31_fpga_resource, | |
148 | .callback = mcb_lpc_create_platform_device, | |
149 | }, | |
73edc8f7 AW |
150 | {} |
151 | }; | |
152 | MODULE_DEVICE_TABLE(dmi, mcb_lpc_dmi_table); | |
153 | ||
154 | static int __init mcb_lpc_init(void) | |
155 | { | |
156 | if (!dmi_check_system(mcb_lpc_dmi_table)) | |
157 | return -ENODEV; | |
158 | ||
159 | return platform_driver_register(&mcb_lpc_driver); | |
160 | } | |
161 | ||
162 | static void __exit mcb_lpc_exit(void) | |
163 | { | |
164 | platform_device_unregister(mcb_lpc_pdev); | |
165 | platform_driver_unregister(&mcb_lpc_driver); | |
166 | } | |
167 | ||
168 | module_init(mcb_lpc_init); | |
169 | module_exit(mcb_lpc_exit); | |
170 | ||
171 | MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>"); | |
172 | MODULE_LICENSE("GPL"); | |
173 | MODULE_DESCRIPTION("MCB over LPC support"); |