diff options
Diffstat (limited to 'target/linux/ramips/files/arch/mips/ralink/rt288x/rt288x.c')
| -rw-r--r-- | target/linux/ramips/files/arch/mips/ralink/rt288x/rt288x.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt288x/rt288x.c b/target/linux/ramips/files/arch/mips/ralink/rt288x/rt288x.c new file mode 100644 index 0000000..cd429a1 --- /dev/null +++ b/target/linux/ramips/files/arch/mips/ralink/rt288x/rt288x.c @@ -0,0 +1,77 @@ +/* + * Ralink RT288x SoC specific setup + * + * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org> + * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> + * + * Parts of this file are based on Ralink's 2.6.21 BSP + * + * 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. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> + +#include <asm/mach-ralink/rt288x.h> +#include <asm/mach-ralink/rt288x_regs.h> + +unsigned char rt288x_sys_type[RT288X_SYS_TYPE_LEN]; + +unsigned long rt288x_cpu_freq; +EXPORT_SYMBOL_GPL(rt288x_cpu_freq); + +unsigned long rt288x_sys_freq; +EXPORT_SYMBOL_GPL(rt288x_sys_freq); + +void __iomem * rt288x_intc_base; +void __iomem * rt288x_sysc_base; +void __iomem * rt288x_memc_base; + +void __init rt288x_detect_sys_type(void) +{ + u32 n0; + u32 n1; + u32 id; + + n0 = rt288x_sysc_rr(SYSC_REG_CHIP_NAME0); + n1 = rt288x_sysc_rr(SYSC_REG_CHIP_NAME1); + id = rt288x_sysc_rr(SYSC_REG_CHIP_ID); + + snprintf(rt288x_sys_type, RT288X_SYS_TYPE_LEN, + "Ralink %c%c%c%c%c%c%c%c id:%u rev:%u", + (char) (n0 & 0xff), (char) ((n0 >> 8) & 0xff), + (char) ((n0 >> 16) & 0xff), (char) ((n0 >> 24) & 0xff), + (char) (n1 & 0xff), (char) ((n1 >> 8) & 0xff), + (char) ((n1 >> 16) & 0xff), (char) ((n1 >> 24) & 0xff), + (id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK, + (id & CHIP_ID_REV_MASK)); +} + +void __init rt288x_detect_sys_freq(void) +{ + u32 t; + + t = rt288x_sysc_rr(SYSC_REG_SYSTEM_CONFIG); + t = ((t >> SYSTEM_CONFIG_CPUCLK_SHIFT) & SYSTEM_CONFIG_CPUCLK_MASK); + + switch (t) { + case SYSTEM_CONFIG_CPUCLK_250: + rt288x_cpu_freq = 250000000; + break; + case SYSTEM_CONFIG_CPUCLK_266: + rt288x_cpu_freq = 266666667; + break; + case SYSTEM_CONFIG_CPUCLK_280: + rt288x_cpu_freq = 280000000; + break; + case SYSTEM_CONFIG_CPUCLK_300: + rt288x_cpu_freq = 300000000; + break; + } + + rt288x_sys_freq = rt288x_cpu_freq / 2; +} + |