2 * Ralink RT305x SoC specific setup
4 * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 * Parts of this file are based on Ralink's 2.6.21 BSP
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published
11 * by the Free Software Foundation.
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/module.h>
18 #include <asm/mach-ralink/common.h>
19 #include <asm/mach-ralink/rt305x.h>
20 #include <asm/mach-ralink/rt305x_regs.h>
22 unsigned long rt305x_cpu_freq;
23 EXPORT_SYMBOL_GPL(rt305x_cpu_freq);
25 unsigned long rt305x_sys_freq;
26 EXPORT_SYMBOL_GPL(rt305x_sys_freq);
28 void __iomem * rt305x_sysc_base;
29 void __iomem * rt305x_memc_base;
31 void __init rt305x_detect_sys_type(void)
37 n0 = rt305x_sysc_rr(SYSC_REG_CHIP_NAME0);
38 n1 = rt305x_sysc_rr(SYSC_REG_CHIP_NAME1);
39 id = rt305x_sysc_rr(SYSC_REG_CHIP_ID);
41 snprintf(ramips_sys_type, RAMIPS_SYS_TYPE_LEN,
42 "Ralink %c%c%c%c%c%c%c%c id:%u rev:%u",
43 (char) (n0 & 0xff), (char) ((n0 >> 8) & 0xff),
44 (char) ((n0 >> 16) & 0xff), (char) ((n0 >> 24) & 0xff),
45 (char) (n1 & 0xff), (char) ((n1 >> 8) & 0xff),
46 (char) ((n1 >> 16) & 0xff), (char) ((n1 >> 24) & 0xff),
47 (id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK,
48 (id & CHIP_ID_REV_MASK));
51 void __init rt305x_detect_sys_freq(void)
55 t = rt305x_sysc_rr(SYSC_REG_SYSTEM_CONFIG);
56 t = ((t >> SYSTEM_CONFIG_CPUCLK_SHIFT) & SYSTEM_CONFIG_CPUCLK_MASK);
59 case SYSTEM_CONFIG_CPUCLK_320:
60 rt305x_cpu_freq = 320000000;
62 case SYSTEM_CONFIG_CPUCLK_384:
63 rt305x_cpu_freq = 384000000;
67 rt305x_sys_freq = rt305x_cpu_freq / 3;