4 * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
5 * Author: Andreas Werner <andreas.werner@men.de>
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.
12 #include <linux/platform_device.h>
13 #include <linux/module.h>
14 #include <linux/dmi.h>
15 #include <linux/mcb.h>
17 #include "mcb-internal.h"
25 static int mcb_lpc_probe(struct platform_device *pdev)
29 int ret = 0, table_size;
31 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
35 priv->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
37 dev_err(&pdev->dev, "No Memory resource\n");
41 res = devm_request_mem_region(&pdev->dev, priv->mem->start,
42 resource_size(priv->mem),
45 dev_err(&pdev->dev, "Failed to request IO memory\n");
49 priv->base = devm_ioremap(&pdev->dev, priv->mem->start,
50 resource_size(priv->mem));
52 dev_err(&pdev->dev, "Cannot ioremap\n");
56 platform_set_drvdata(pdev, priv);
58 priv->bus = mcb_alloc_bus(&pdev->dev);
59 if (IS_ERR(priv->bus))
60 return PTR_ERR(priv->bus);
62 ret = chameleon_parse_cells(priv->bus, priv->mem->start, priv->base);
69 if (table_size < CHAM_HEADER_SIZE) {
70 /* Release the previous resources */
71 devm_iounmap(&pdev->dev, priv->base);
72 devm_release_mem_region(&pdev->dev, priv->mem->start, resource_size(priv->mem));
74 /* Then, allocate it again with the actual chameleon table size */
75 res = devm_request_mem_region(&pdev->dev, priv->mem->start,
79 dev_err(&pdev->dev, "Failed to request PCI memory\n");
84 priv->base = devm_ioremap(&pdev->dev, priv->mem->start, table_size);
86 dev_err(&pdev->dev, "Cannot ioremap\n");
91 platform_set_drvdata(pdev, priv);
94 mcb_bus_add_devices(priv->bus);
99 mcb_release_bus(priv->bus);
103 static int mcb_lpc_remove(struct platform_device *pdev)
105 struct priv *priv = platform_get_drvdata(pdev);
107 mcb_release_bus(priv->bus);
112 static struct platform_device *mcb_lpc_pdev;
114 static int mcb_lpc_create_platform_device(const struct dmi_system_id *id)
116 struct resource *res = id->driver_data;
119 mcb_lpc_pdev = platform_device_alloc("mcb-lpc", -1);
123 ret = platform_device_add_resources(mcb_lpc_pdev, res, 1);
127 ret = platform_device_add(mcb_lpc_pdev);
134 platform_device_put(mcb_lpc_pdev);
138 static struct resource sc24_fpga_resource = {
140 .end = 0xe000e000 + CHAM_HEADER_SIZE,
141 .flags = IORESOURCE_MEM,
144 static struct resource sc31_fpga_resource = {
146 .end = 0xf000e000 + CHAM_HEADER_SIZE,
147 .flags = IORESOURCE_MEM,
150 static struct platform_driver mcb_lpc_driver = {
154 .probe = mcb_lpc_probe,
155 .remove = mcb_lpc_remove,
158 static const struct dmi_system_id mcb_lpc_dmi_table[] = {
162 DMI_MATCH(DMI_SYS_VENDOR, "MEN"),
163 DMI_MATCH(DMI_PRODUCT_VERSION, "14SC24"),
165 .driver_data = (void *)&sc24_fpga_resource,
166 .callback = mcb_lpc_create_platform_device,
171 DMI_MATCH(DMI_SYS_VENDOR, "MEN"),
172 DMI_MATCH(DMI_PRODUCT_VERSION, "14SC31"),
174 .driver_data = (void *)&sc31_fpga_resource,
175 .callback = mcb_lpc_create_platform_device,
179 MODULE_DEVICE_TABLE(dmi, mcb_lpc_dmi_table);
181 static int __init mcb_lpc_init(void)
183 if (!dmi_check_system(mcb_lpc_dmi_table))
186 return platform_driver_register(&mcb_lpc_driver);
189 static void __exit mcb_lpc_exit(void)
191 platform_device_unregister(mcb_lpc_pdev);
192 platform_driver_unregister(&mcb_lpc_driver);
195 module_init(mcb_lpc_init);
196 module_exit(mcb_lpc_exit);
198 MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>");
199 MODULE_LICENSE("GPL");
200 MODULE_DESCRIPTION("MCB over LPC support");