diff options
Diffstat (limited to 'target/linux/adm5120/files/arch/mips/adm5120/common/adm5120.c')
| -rw-r--r-- | target/linux/adm5120/files/arch/mips/adm5120/common/adm5120.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/target/linux/adm5120/files/arch/mips/adm5120/common/adm5120.c b/target/linux/adm5120/files/arch/mips/adm5120/common/adm5120.c new file mode 100644 index 0000000000..f227e871da --- /dev/null +++ b/target/linux/adm5120/files/arch/mips/adm5120/common/adm5120.c @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * 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/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/io.h> + +#include <asm/bootinfo.h> +#include <asm/addrspace.h> + +#include <asm/mach-adm5120/adm5120_info.h> +#include <asm/mach-adm5120/adm5120_defs.h> +#include <asm/mach-adm5120/adm5120_switch.h> + +unsigned int adm5120_product_code; +unsigned int adm5120_revision; +unsigned int adm5120_package; +unsigned int adm5120_nand_boot; +unsigned long adm5120_speed; + +/* + * CPU settings detection + */ +#define CODE_GET_PC(c) ((c) & CODE_PC_MASK) +#define CODE_GET_REV(c) (((c) >> CODE_REV_SHIFT) & CODE_REV_MASK) +#define CODE_GET_PK(c) (((c) >> CODE_PK_SHIFT) & CODE_PK_MASK) +#define CODE_GET_CLKS(c) (((c) >> CODE_CLKS_SHIFT) & CODE_CLKS_MASK) +#define CODE_GET_NAB(c) (((c) & CODE_NAB) != 0) + +void adm5120_ndelay(u32 ns) +{ + u32 t; + + SW_WRITE_REG(SWITCH_REG_TIMER, TIMER_PERIOD_DEFAULT); + SW_WRITE_REG(SWITCH_REG_TIMER_INT, (TIMER_INT_TOS | TIMER_INT_TOM)); + + t = (ns+640) / 640; + t &= TIMER_PERIOD_MASK; + SW_WRITE_REG(SWITCH_REG_TIMER, t | TIMER_TE); + + /* wait until the timer expires */ + do { + t = SW_READ_REG(SWITCH_REG_TIMER_INT); + } while ((t & TIMER_INT_TOS) == 0); + + /* leave the timer disabled */ + SW_WRITE_REG(SWITCH_REG_TIMER, TIMER_PERIOD_DEFAULT); + SW_WRITE_REG(SWITCH_REG_TIMER_INT, (TIMER_INT_TOS | TIMER_INT_TOM)); +} + +void __init adm5120_soc_init(void) +{ + u32 code; + u32 clks; + + code = SW_READ_REG(SWITCH_REG_CODE); + + adm5120_product_code = CODE_GET_PC(code); + adm5120_revision = CODE_GET_REV(code); + adm5120_package = (CODE_GET_PK(code) == CODE_PK_BGA) ? + ADM5120_PACKAGE_BGA : ADM5120_PACKAGE_PQFP; + adm5120_nand_boot = CODE_GET_NAB(code); + + clks = CODE_GET_CLKS(code); + adm5120_speed = ADM5120_SPEED_175; + if (clks & 1) + adm5120_speed += 25000000; + if (clks & 2) + adm5120_speed += 50000000; +} |