1
2
3
4
5
6
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
16struct priv {
17 struct mcb_bus *bus;
18 struct resource *mem;
19 void __iomem *base;
20};
21
22static 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
73static 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
82static struct platform_device *mcb_lpc_pdev;
83
84static 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
103out_put:
104 platform_device_put(mcb_lpc_pdev);
105 return ret;
106}
107
108static struct resource sc24_fpga_resource = {
109 .start = 0xe000e000,
110 .end = 0xe000e000 + CHAM_HEADER_SIZE,
111 .flags = IORESOURCE_MEM,
112};
113
114static struct resource sc31_fpga_resource = {
115 .start = 0xf000e000,
116 .end = 0xf000e000 + CHAM_HEADER_SIZE,
117 .flags = IORESOURCE_MEM,
118};
119
120static 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
128static 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 },
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 },
147 {}
148};
149MODULE_DEVICE_TABLE(dmi, mcb_lpc_dmi_table);
150
151static 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
159static void __exit mcb_lpc_exit(void)
160{
161 platform_device_unregister(mcb_lpc_pdev);
162 platform_driver_unregister(&mcb_lpc_driver);
163}
164
165module_init(mcb_lpc_init);
166module_exit(mcb_lpc_exit);
167
168MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>");
169MODULE_LICENSE("GPL");
170MODULE_DESCRIPTION("MCB over LPC support");
171MODULE_IMPORT_NS(MCB);
172
