1 /* 2 * This program is free software; you can redistribute it and/or modify it 3 * under the terms of the GNU General Public License version 2 as published 4 * by the Free Software Foundation. 5 * 6 * Copyright (C) 2012 Thomas Langer <thomas.langer@lantiq.com> 7 * Copyright (C) 2012 John Crispin <john@phrozen.org> 8 */ 9 10 #include <linux/kernel.h> 11 #include <asm/cacheflush.h> 12 #include <asm/traps.h> 13 #include <asm/io.h> 14 15 #include <lantiq_soc.h> 16 17 #include "../prom.h" 18 19 #define SOC_FALCON "Falcon" 20 #define SOC_FALCON_D "Falcon-D" 21 #define SOC_FALCON_V "Falcon-V" 22 #define SOC_FALCON_M "Falcon-M" 23 24 #define COMP_FALCON "lantiq,falcon" 25 26 #define PART_SHIFT 12 27 #define PART_MASK 0x0FFFF000 28 #define REV_SHIFT 28 29 #define REV_MASK 0xF0000000 30 #define SREV_SHIFT 22 31 #define SREV_MASK 0x03C00000 32 #define TYPE_SHIFT 26 33 #define TYPE_MASK 0x3C000000 34 35 /* reset, nmi and ejtag exception vectors */ 36 #define BOOT_REG_BASE (KSEG1 | 0x1F200000) 37 #define BOOT_RVEC (BOOT_REG_BASE | 0x00) 38 #define BOOT_NVEC (BOOT_REG_BASE | 0x04) 39 #define BOOT_EVEC (BOOT_REG_BASE | 0x08) 40 41 void __init ltq_soc_nmi_setup(void) 42 { 43 extern void (*nmi_handler)(void); 44 45 ltq_w32((unsigned long)&nmi_handler, (void *)BOOT_NVEC); 46 } 47 48 void __init ltq_soc_ejtag_setup(void) 49 { 50 extern void (*ejtag_debug_handler)(void); 51 52 ltq_w32((unsigned long)&ejtag_debug_handler, (void *)BOOT_EVEC); 53 } 54 55 void __init ltq_soc_detect(struct ltq_soc_info *i) 56 { 57 u32 type; 58 i->partnum = (ltq_r32(FALCON_CHIPID) & PART_MASK) >> PART_SHIFT; 59 i->rev = (ltq_r32(FALCON_CHIPID) & REV_MASK) >> REV_SHIFT; 60 i->srev = ((ltq_r32(FALCON_CHIPCONF) & SREV_MASK) >> SREV_SHIFT); 61 i->compatible = COMP_FALCON; 62 i->type = SOC_TYPE_FALCON; 63 sprintf(i->rev_type, "%c%d%d", (i->srev & 0x4) ? ('B') : ('A'), 64 i->rev & 0x7, (i->srev & 0x3) + 1); 65 66 switch (i->partnum) { 67 case SOC_ID_FALCON: 68 type = (ltq_r32(FALCON_CHIPTYPE) & TYPE_MASK) >> TYPE_SHIFT; 69 switch (type) { 70 case 0: 71 i->name = SOC_FALCON_D; 72 break; 73 case 1: 74 i->name = SOC_FALCON_V; 75 break; 76 case 2: 77 i->name = SOC_FALCON_M; 78 break; 79 default: 80 i->name = SOC_FALCON; 81 break; 82 } 83 break; 84 85 default: 86 unreachable(); 87 break; 88 } 89 90 board_nmi_handler_setup = ltq_soc_nmi_setup; 91 board_ejtag_handler_setup = ltq_soc_ejtag_setup; 92 } 93