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b886d83c | 1 | // SPDX-License-Identifier: GPL-2.0-only |
73edc8f7 AW |
2 | /* |
3 | * MEN Chameleon Bus. | |
4 | * | |
5 | * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de) | |
6 | * Author: Andreas Werner <andreas.werner@men.de> | |
73edc8f7 AW |
7 | */ |
8 | ||
9 | #include <linux/platform_device.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/dmi.h> | |
12 | #include <linux/mcb.h> | |
13 | #include <linux/io.h> | |
14 | #include "mcb-internal.h" | |
15 | ||
16 | struct priv { | |
17 | struct mcb_bus *bus; | |
18 | struct resource *mem; | |
19 | void __iomem *base; | |
20 | }; | |
21 | ||
22 | static int mcb_lpc_probe(struct platform_device *pdev) | |
23 | { | |
24 | struct resource *res; | |
25 | struct priv *priv; | |
26 | int ret = 0; | |
27 | ||
28 | priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); | |
29 | if (!priv) | |
30 | return -ENOMEM; | |
31 | ||
32 | priv->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
33 | if (!priv->mem) { | |
34 | dev_err(&pdev->dev, "No Memory resource\n"); | |
35 | return -ENODEV; | |
36 | } | |
37 | ||
38 | res = devm_request_mem_region(&pdev->dev, priv->mem->start, | |
39 | resource_size(priv->mem), | |
40 | KBUILD_MODNAME); | |
41 | if (!res) { | |
42 | dev_err(&pdev->dev, "Failed to request IO memory\n"); | |
43 | return -EBUSY; | |
44 | } | |
45 | ||
46 | priv->base = devm_ioremap(&pdev->dev, priv->mem->start, | |
47 | resource_size(priv->mem)); | |
48 | if (!priv->base) { | |
49 | dev_err(&pdev->dev, "Cannot ioremap\n"); | |
50 | return -ENOMEM; | |
51 | } | |
52 | ||
53 | platform_set_drvdata(pdev, priv); | |
54 | ||
55 | priv->bus = mcb_alloc_bus(&pdev->dev); | |
56 | if (IS_ERR(priv->bus)) | |
57 | return PTR_ERR(priv->bus); | |
58 | ||
59 | ret = chameleon_parse_cells(priv->bus, priv->mem->start, priv->base); | |
60 | if (ret < 0) { | |
61 | mcb_release_bus(priv->bus); | |
62 | return ret; | |
63 | } | |
64 | ||
65 | dev_dbg(&pdev->dev, "Found %d cells\n", ret); | |
66 | ||
67 | mcb_bus_add_devices(priv->bus); | |
68 | ||
69 | return 0; | |
70 | ||
71 | } | |
72 | ||
73 | static int mcb_lpc_remove(struct platform_device *pdev) | |
74 | { | |
75 | struct priv *priv = platform_get_drvdata(pdev); | |
76 | ||
77 | mcb_release_bus(priv->bus); | |
78 | ||
79 | return 0; | |
80 | } | |
81 | ||
82 | static struct platform_device *mcb_lpc_pdev; | |
83 | ||
84 | static int mcb_lpc_create_platform_device(const struct dmi_system_id *id) | |
85 | { | |
86 | struct resource *res = id->driver_data; | |
87 | int ret; | |
88 | ||
89 | mcb_lpc_pdev = platform_device_alloc("mcb-lpc", -1); | |
90 | if (!mcb_lpc_pdev) | |
91 | return -ENOMEM; | |
92 | ||
93 | ret = platform_device_add_resources(mcb_lpc_pdev, res, 1); | |
94 | if (ret) | |
95 | goto out_put; | |
96 | ||
97 | ret = platform_device_add(mcb_lpc_pdev); | |
98 | if (ret) | |
99 | goto out_put; | |
100 | ||
101 | return 0; | |
102 | ||
103 | out_put: | |
104 | platform_device_put(mcb_lpc_pdev); | |
105 | return ret; | |
106 | } | |
107 | ||
108 | static struct resource sc24_fpga_resource = { | |
109 | .start = 0xe000e000, | |
110 | .end = 0xe000e000 + CHAM_HEADER_SIZE, | |
111 | .flags = IORESOURCE_MEM, | |
112 | }; | |
113 | ||
acf5e051 MM |
114 | static struct resource sc31_fpga_resource = { |
115 | .start = 0xf000e000, | |
116 | .end = 0xf000e000 + CHAM_HEADER_SIZE, | |
117 | .flags = IORESOURCE_MEM, | |
118 | }; | |
119 | ||
73edc8f7 AW |
120 | static struct platform_driver mcb_lpc_driver = { |
121 | .driver = { | |
122 | .name = "mcb-lpc", | |
123 | }, | |
124 | .probe = mcb_lpc_probe, | |
125 | .remove = mcb_lpc_remove, | |
126 | }; | |
127 | ||
128 | static const struct dmi_system_id mcb_lpc_dmi_table[] = { | |
129 | { | |
130 | .ident = "SC24", | |
131 | .matches = { | |
132 | DMI_MATCH(DMI_SYS_VENDOR, "MEN"), | |
133 | DMI_MATCH(DMI_PRODUCT_VERSION, "14SC24"), | |
134 | }, | |
135 | .driver_data = (void *)&sc24_fpga_resource, | |
136 | .callback = mcb_lpc_create_platform_device, | |
137 | }, | |
acf5e051 MM |
138 | { |
139 | .ident = "SC31", | |
140 | .matches = { | |
141 | DMI_MATCH(DMI_SYS_VENDOR, "MEN"), | |
142 | DMI_MATCH(DMI_PRODUCT_VERSION, "14SC31"), | |
143 | }, | |
144 | .driver_data = (void *)&sc31_fpga_resource, | |
145 | .callback = mcb_lpc_create_platform_device, | |
146 | }, | |
73edc8f7 AW |
147 | {} |
148 | }; | |
149 | MODULE_DEVICE_TABLE(dmi, mcb_lpc_dmi_table); | |
150 | ||
151 | static int __init mcb_lpc_init(void) | |
152 | { | |
153 | if (!dmi_check_system(mcb_lpc_dmi_table)) | |
154 | return -ENODEV; | |
155 | ||
156 | return platform_driver_register(&mcb_lpc_driver); | |
157 | } | |
158 | ||
159 | static void __exit mcb_lpc_exit(void) | |
160 | { | |
161 | platform_device_unregister(mcb_lpc_pdev); | |
162 | platform_driver_unregister(&mcb_lpc_driver); | |
163 | } | |
164 | ||
165 | module_init(mcb_lpc_init); | |
166 | module_exit(mcb_lpc_exit); | |
167 | ||
168 | MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>"); | |
169 | MODULE_LICENSE("GPL"); | |
170 | MODULE_DESCRIPTION("MCB over LPC support"); | |
891e6036 | 171 | MODULE_IMPORT_NS(MCB); |