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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * MEN Chameleon Bus.
4 *
5 * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
6 * Author: Andreas Werner <andreas.werner@men.de>
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, table_size;
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 goto out_mcb_bus;
62 }
63
64 table_size = ret;
65
66 if (table_size < CHAM_HEADER_SIZE) {
67 /* Release the previous resources */
68 devm_iounmap(&pdev->dev, priv->base);
69 devm_release_mem_region(&pdev->dev, priv->mem->start, resource_size(priv->mem));
70
71 /* Then, allocate it again with the actual chameleon table size */
72 res = devm_request_mem_region(&pdev->dev, priv->mem->start,
73 table_size,
74 KBUILD_MODNAME);
75 if (!res) {
76 dev_err(&pdev->dev, "Failed to request PCI memory\n");
77 ret = -EBUSY;
78 goto out_mcb_bus;
79 }
80
81 priv->base = devm_ioremap(&pdev->dev, priv->mem->start, table_size);
82 if (!priv->base) {
83 dev_err(&pdev->dev, "Cannot ioremap\n");
84 ret = -ENOMEM;
85 goto out_mcb_bus;
86 }
87
88 platform_set_drvdata(pdev, priv);
89 }
90
91 mcb_bus_add_devices(priv->bus);
92
93 return 0;
94
95out_mcb_bus:
96 mcb_release_bus(priv->bus);
97 return ret;
98}
99
100static int mcb_lpc_remove(struct platform_device *pdev)
101{
102 struct priv *priv = platform_get_drvdata(pdev);
103
104 mcb_release_bus(priv->bus);
105
106 return 0;
107}
108
109static struct platform_device *mcb_lpc_pdev;
110
111static int mcb_lpc_create_platform_device(const struct dmi_system_id *id)
112{
113 struct resource *res = id->driver_data;
114 int ret;
115
116 mcb_lpc_pdev = platform_device_alloc("mcb-lpc", -1);
117 if (!mcb_lpc_pdev)
118 return -ENOMEM;
119
120 ret = platform_device_add_resources(mcb_lpc_pdev, res, 1);
121 if (ret)
122 goto out_put;
123
124 ret = platform_device_add(mcb_lpc_pdev);
125 if (ret)
126 goto out_put;
127
128 return 0;
129
130out_put:
131 platform_device_put(mcb_lpc_pdev);
132 return ret;
133}
134
135static struct resource sc24_fpga_resource = DEFINE_RES_MEM(0xe000e000, CHAM_HEADER_SIZE);
136static struct resource sc31_fpga_resource = DEFINE_RES_MEM(0xf000e000, CHAM_HEADER_SIZE);
137
138static struct platform_driver mcb_lpc_driver = {
139 .driver = {
140 .name = "mcb-lpc",
141 },
142 .probe = mcb_lpc_probe,
143 .remove = mcb_lpc_remove,
144};
145
146static const struct dmi_system_id mcb_lpc_dmi_table[] = {
147 {
148 .ident = "SC24",
149 .matches = {
150 DMI_MATCH(DMI_SYS_VENDOR, "MEN"),
151 DMI_MATCH(DMI_PRODUCT_VERSION, "14SC24"),
152 },
153 .driver_data = (void *)&sc24_fpga_resource,
154 .callback = mcb_lpc_create_platform_device,
155 },
156 {
157 .ident = "SC31",
158 .matches = {
159 DMI_MATCH(DMI_SYS_VENDOR, "MEN"),
160 DMI_MATCH(DMI_PRODUCT_VERSION, "14SC31"),
161 },
162 .driver_data = (void *)&sc31_fpga_resource,
163 .callback = mcb_lpc_create_platform_device,
164 },
165 {}
166};
167MODULE_DEVICE_TABLE(dmi, mcb_lpc_dmi_table);
168
169static int __init mcb_lpc_init(void)
170{
171 if (!dmi_check_system(mcb_lpc_dmi_table))
172 return -ENODEV;
173
174 return platform_driver_register(&mcb_lpc_driver);
175}
176
177static void __exit mcb_lpc_exit(void)
178{
179 platform_device_unregister(mcb_lpc_pdev);
180 platform_driver_unregister(&mcb_lpc_driver);
181}
182
183module_init(mcb_lpc_init);
184module_exit(mcb_lpc_exit);
185
186MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>");
187MODULE_LICENSE("GPL");
188MODULE_DESCRIPTION("MCB over LPC support");
189MODULE_IMPORT_NS(MCB);
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
19struct priv {
20 struct mcb_bus *bus;
21 struct resource *mem;
22 void __iomem *base;
23};
24
25static 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
76static 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
85static struct platform_device *mcb_lpc_pdev;
86
87static 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
106out_put:
107 platform_device_put(mcb_lpc_pdev);
108 return ret;
109}
110
111static struct resource sc24_fpga_resource = {
112 .start = 0xe000e000,
113 .end = 0xe000e000 + CHAM_HEADER_SIZE,
114 .flags = IORESOURCE_MEM,
115};
116
117static struct platform_driver mcb_lpc_driver = {
118 .driver = {
119 .name = "mcb-lpc",
120 },
121 .probe = mcb_lpc_probe,
122 .remove = mcb_lpc_remove,
123};
124
125static const struct dmi_system_id mcb_lpc_dmi_table[] = {
126 {
127 .ident = "SC24",
128 .matches = {
129 DMI_MATCH(DMI_SYS_VENDOR, "MEN"),
130 DMI_MATCH(DMI_PRODUCT_VERSION, "14SC24"),
131 },
132 .driver_data = (void *)&sc24_fpga_resource,
133 .callback = mcb_lpc_create_platform_device,
134 },
135 {}
136};
137MODULE_DEVICE_TABLE(dmi, mcb_lpc_dmi_table);
138
139static int __init mcb_lpc_init(void)
140{
141 if (!dmi_check_system(mcb_lpc_dmi_table))
142 return -ENODEV;
143
144 return platform_driver_register(&mcb_lpc_driver);
145}
146
147static void __exit mcb_lpc_exit(void)
148{
149 platform_device_unregister(mcb_lpc_pdev);
150 platform_driver_unregister(&mcb_lpc_driver);
151}
152
153module_init(mcb_lpc_init);
154module_exit(mcb_lpc_exit);
155
156MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>");
157MODULE_LICENSE("GPL");
158MODULE_DESCRIPTION("MCB over LPC support");