From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Wed, 23 Jan 2013 13:10:58 +0100 (CET) Received: from nbd.name ([46.4.11.11]:52031 "EHLO nbd.name" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S6833397Ab3AWMIo4CqDi (ORCPT ); Wed, 23 Jan 2013 13:08:44 +0100 From: John Crispin To: Ralf Baechle Cc: linux-mips@linux-mips.org, John Crispin Subject: [RFC 07/11] MIPS: ralink: adds OF code Date: Wed, 23 Jan 2013 13:05:51 +0100 Message-Id: <1358942755-25371-8-git-send-email-blogic@openwrt.org> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1358942755-25371-1-git-send-email-blogic@openwrt.org> References: <1358942755-25371-1-git-send-email-blogic@openwrt.org> X-archive-position: 35513 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: blogic@openwrt.org Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips Return-Path: Until there is a generic MIPS way of handing the DTB over from bootloader to kernel we rely on a built in devicetrees. The OF code also remaps those register ranges that we use global in our drivers. Signed-off-by: John Crispin --- arch/mips/ralink/of.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 105 insertions(+) create mode 100644 arch/mips/ralink/of.c diff --git a/arch/mips/ralink/of.c b/arch/mips/ralink/of.c new file mode 100644 index 0000000..02814b3 --- /dev/null +++ b/arch/mips/ralink/of.c @@ -0,0 +1,105 @@ +/* + * 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. + * + * Copyright (C) 2008 Imre Kaloz + * Copyright (C) 2008-2009 Gabor Juhos + * Copyright (C) 2013 John Crispin + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "common.h" + +__iomem void *rt_sysc_membase; +__iomem void *rt_memc_membase; + +extern struct boot_param_header __dtb_start; + +void __init ralink_of_remap(void) +{ + struct resource res_sysc, res_memc; + struct device_node *np_sysc = + of_find_compatible_node(NULL, NULL, "ralink,sysc"); + struct device_node *np_memc = + of_find_compatible_node(NULL, NULL, "ralink,memc"); + + if (!np_sysc || !np_memc) + panic("Failed to load core nodes from devicetree"); + + if (of_address_to_resource(np_sysc, 0, &res_sysc) || + of_address_to_resource(np_memc, 0, &res_memc)) + panic("Failed to get core resources"); + + if ((request_mem_region(res_sysc.start, resource_size(&res_sysc), + res_sysc.name) < 0) || + (request_mem_region(res_memc.start, resource_size(&res_memc), + res_memc.name) < 0)) + pr_err("Failed to request core resources"); + + rt_sysc_membase = ioremap_nocache(res_sysc.start, + resource_size(&res_sysc)); + rt_memc_membase = ioremap_nocache(res_memc.start, + resource_size(&res_memc)); + + if (!rt_sysc_membase || !rt_memc_membase) + panic("Failed to remap core resources"); +} + +void __init device_tree_init(void) +{ + unsigned long base, size; + + if (!initial_boot_params) + return; + + base = virt_to_phys((void *)initial_boot_params); + size = be32_to_cpu(initial_boot_params->totalsize); + + /* Before we do anything, lets reserve the dt blob */ + reserve_bootmem(base, size, BOOTMEM_DEFAULT); + + unflatten_device_tree(); +} + +void __init plat_mem_setup(void) +{ + set_io_port_base(KSEG1); + + /* + * Load the builtin devicetree. This causes the chosen node to be + * parsed resulting in our memory appearing + */ + __dt_setup_arch(&__dtb_start); +} + +static int __init plat_of_setup(void) +{ + static struct of_device_id of_ids[3]; + int len = sizeof(of_ids[0].compatible); + + if (!of_have_populated_dt()) + panic("device tree not present"); + + strncpy(of_ids[0].compatible, soc_info.compatible, len); + strncpy(of_ids[1].compatible, "palmbus", len); + + if (of_platform_populate(NULL, of_ids, NULL, NULL)) + panic("failed to populate DT\n"); + + return 0; +} + +arch_initcall(plat_of_setup); -- 1.7.10.4