| 1 | /* |
| 2 | * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License version 2 as published |
| 6 | * by the Free Software Foundation. |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | #include <linux/types.h> |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/io.h> |
| 14 | |
| 15 | #include <asm/addrspace.h> |
| 16 | |
| 17 | #include <asm/mach-adm5120/adm5120_info.h> |
| 18 | #include <asm/mach-adm5120/adm5120_defs.h> |
| 19 | #include <asm/mach-adm5120/adm5120_switch.h> |
| 20 | |
| 21 | unsigned int adm5120_product_code; |
| 22 | unsigned int adm5120_revision; |
| 23 | unsigned int adm5120_package; |
| 24 | unsigned int adm5120_nand_boot; |
| 25 | unsigned long adm5120_speed; |
| 26 | |
| 27 | /* |
| 28 | * CPU settings detection |
| 29 | */ |
| 30 | #define CODE_GET_PC(c) ((c) & CODE_PC_MASK) |
| 31 | #define CODE_GET_REV(c) (((c) >> CODE_REV_SHIFT) & CODE_REV_MASK) |
| 32 | #define CODE_GET_PK(c) (((c) >> CODE_PK_SHIFT) & CODE_PK_MASK) |
| 33 | #define CODE_GET_CLKS(c) (((c) >> CODE_CLKS_SHIFT) & CODE_CLKS_MASK) |
| 34 | #define CODE_GET_NAB(c) (((c) & CODE_NAB) != 0) |
| 35 | |
| 36 | void adm5120_ndelay(u32 ns) |
| 37 | { |
| 38 | u32 t; |
| 39 | |
| 40 | SW_WRITE_REG(SWITCH_REG_TIMER, TIMER_PERIOD_DEFAULT); |
| 41 | SW_WRITE_REG(SWITCH_REG_TIMER_INT, (TIMER_INT_TOS | TIMER_INT_TOM)); |
| 42 | |
| 43 | t = (ns+640) / 640; |
| 44 | t &= TIMER_PERIOD_MASK; |
| 45 | SW_WRITE_REG(SWITCH_REG_TIMER, t | TIMER_TE); |
| 46 | |
| 47 | /* wait until the timer expires */ |
| 48 | do { |
| 49 | t = SW_READ_REG(SWITCH_REG_TIMER_INT); |
| 50 | } while ((t & TIMER_INT_TOS) == 0); |
| 51 | |
| 52 | /* leave the timer disabled */ |
| 53 | SW_WRITE_REG(SWITCH_REG_TIMER, TIMER_PERIOD_DEFAULT); |
| 54 | SW_WRITE_REG(SWITCH_REG_TIMER_INT, (TIMER_INT_TOS | TIMER_INT_TOM)); |
| 55 | } |
| 56 | |
| 57 | void __init adm5120_soc_init(void) |
| 58 | { |
| 59 | u32 code; |
| 60 | u32 clks; |
| 61 | |
| 62 | code = SW_READ_REG(SWITCH_REG_CODE); |
| 63 | |
| 64 | adm5120_product_code = CODE_GET_PC(code); |
| 65 | adm5120_revision = CODE_GET_REV(code); |
| 66 | adm5120_package = (CODE_GET_PK(code) == CODE_PK_BGA) ? |
| 67 | ADM5120_PACKAGE_BGA : ADM5120_PACKAGE_PQFP; |
| 68 | adm5120_nand_boot = CODE_GET_NAB(code); |
| 69 | |
| 70 | clks = CODE_GET_CLKS(code); |
| 71 | adm5120_speed = ADM5120_SPEED_175; |
| 72 | if (clks & 1) |
| 73 | adm5120_speed += 25000000; |
| 74 | if (clks & 2) |
| 75 | adm5120_speed += 50000000; |
| 76 | } |
| 77 | |
