/* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. * * EBU - the external bus unit attaches PCI, NOR and NAND * * Copyright (C) 2010 John Crispin */ #include #include #include #include #include /* all access to the ebu must be locked */ DEFINE_SPINLOCK(ebu_lock); EXPORT_SYMBOL_GPL(ebu_lock); static struct resource ltq_ebu_resource = { .name = "ebu", .start = LTQ_EBU_BASE_ADDR, .end = LTQ_EBU_BASE_ADDR + LTQ_EBU_SIZE - 1, .flags = IORESOURCE_MEM, }; /* remapped base addr of the clock unit and external bus unit */ void __iomem *ltq_ebu_membase; static int __init lantiq_ebu_init(void) { /* insert and request the memory region */ if (insert_resource(&iomem_resource, <q_ebu_resource) < 0) panic("Failed to insert ebu memory\n"); if (request_mem_region(ltq_ebu_resource.start, resource_size(<q_ebu_resource), "ebu") < 0) panic("Failed to request ebu memory\n"); /* remap ebu register range */ ltq_ebu_membase = ioremap_nocache(ltq_ebu_resource.start, resource_size(<q_ebu_resource)); if (!ltq_ebu_membase) panic("Failed to remap ebu memory\n"); /* make sure to unprotect the memory region where flash is located */ ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_BUSCON0) & ~EBU_WRDIS, LTQ_EBU_BUSCON0); return 0; } postcore_initcall(lantiq_ebu_init);