111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* Parts of this file are based on Ralink's 2.6.21 BSP
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*
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* Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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* Copyright (C) 2013 John Crispin <john@phrozen.org>
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/sys_soc.h>
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#include <asm/mipsregs.h>
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#include <asm/mach-ralink/ralink_regs.h>
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#include <asm/mach-ralink/rt288x.h>
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#include "common.h"
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static struct ralink_soc_info *soc_info_ptr;
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static unsigned int __init rt2880_get_soc_name0(void)
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{
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return __raw_readl(RT2880_SYSC_BASE + SYSC_REG_CHIP_NAME0);
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}
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static unsigned int __init rt2880_get_soc_name1(void)
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{
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return __raw_readl(RT2880_SYSC_BASE + SYSC_REG_CHIP_NAME1);
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}
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static bool __init rt2880_soc_valid(void)
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{
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if (rt2880_get_soc_name0() == RT2880_CHIP_NAME0 &&
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rt2880_get_soc_name1() == RT2880_CHIP_NAME1)
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return true;
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else
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return false;
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}
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static const char __init *rt2880_get_soc_name(void)
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{
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if (rt2880_soc_valid())
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return "RT2880";
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else
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return "invalid";
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}
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static unsigned int __init rt2880_get_soc_id(void)
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{
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return __raw_readl(RT2880_SYSC_BASE + SYSC_REG_CHIP_ID);
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}
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static unsigned int __init rt2880_get_soc_ver(void)
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{
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return (rt2880_get_soc_id() >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK;
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}
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static unsigned int __init rt2880_get_soc_rev(void)
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{
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return (rt2880_get_soc_id() & CHIP_ID_REV_MASK);
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}
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static int __init rt2880_soc_dev_init(void)
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{
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struct soc_device *soc_dev;
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struct soc_device_attribute *soc_dev_attr;
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soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
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if (!soc_dev_attr)
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return -ENOMEM;
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soc_dev_attr->family = "Ralink";
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soc_dev_attr->soc_id = rt2880_get_soc_name();
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soc_dev_attr->data = soc_info_ptr;
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soc_dev = soc_device_register(soc_dev_attr);
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if (IS_ERR(soc_dev)) {
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kfree(soc_dev_attr);
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return PTR_ERR(soc_dev);
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}
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return 0;
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}
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device_initcall(rt2880_soc_dev_init);
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void __init prom_soc_init(struct ralink_soc_info *soc_info)
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{
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if (rt2880_soc_valid())
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soc_info->compatible = "ralink,r2880-soc";
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else
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panic("rt288x: unknown SoC, n0:%08x n1:%08x",
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rt2880_get_soc_name0(), rt2880_get_soc_name1());
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snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
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"Ralink %s id:%u rev:%u",
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rt2880_get_soc_name(),
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rt2880_get_soc_ver(),
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rt2880_get_soc_rev());
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soc_info->mem_base = RT2880_SDRAM_BASE;
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soc_info->mem_size_min = RT2880_MEM_SIZE_MIN;
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soc_info->mem_size_max = RT2880_MEM_SIZE_MAX;
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ralink_soc = RT2880_SOC;
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soc_info_ptr = soc_info;
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}
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