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