1f137e463SAndrew Isaacson /* 2f137e463SAndrew Isaacson * Copyright (C) 2000,2001,2002,2003,2004 Broadcom Corporation 3f137e463SAndrew Isaacson * 4f137e463SAndrew Isaacson * This program is free software; you can redistribute it and/or 5f137e463SAndrew Isaacson * modify it under the terms of the GNU General Public License 6f137e463SAndrew Isaacson * as published by the Free Software Foundation; either version 2 7f137e463SAndrew Isaacson * of the License, or (at your option) any later version. 8f137e463SAndrew Isaacson * 9f137e463SAndrew Isaacson * This program is distributed in the hope that it will be useful, 10f137e463SAndrew Isaacson * but WITHOUT ANY WARRANTY; without even the implied warranty of 11f137e463SAndrew Isaacson * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12f137e463SAndrew Isaacson * GNU General Public License for more details. 13f137e463SAndrew Isaacson * 14f137e463SAndrew Isaacson * You should have received a copy of the GNU General Public License 15f137e463SAndrew Isaacson * along with this program; if not, write to the Free Software 16f137e463SAndrew Isaacson * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17f137e463SAndrew Isaacson */ 18da51f9e1SRalf Baechle #include <linux/init.h> 19f137e463SAndrew Isaacson #include <linux/kernel.h> 2031185131SRalf Baechle #include <linux/module.h> 21f137e463SAndrew Isaacson #include <linux/reboot.h> 22f137e463SAndrew Isaacson #include <linux/string.h> 23f137e463SAndrew Isaacson 24f137e463SAndrew Isaacson #include <asm/bootinfo.h> 258ff374b9SMaciej W. Rozycki #include <asm/cpu.h> 26f137e463SAndrew Isaacson #include <asm/mipsregs.h> 27f137e463SAndrew Isaacson #include <asm/io.h> 28f137e463SAndrew Isaacson #include <asm/sibyte/sb1250.h> 29f137e463SAndrew Isaacson 30f137e463SAndrew Isaacson #include <asm/sibyte/bcm1480_regs.h> 31f137e463SAndrew Isaacson #include <asm/sibyte/bcm1480_scd.h> 32f137e463SAndrew Isaacson #include <asm/sibyte/sb1250_scd.h> 33f137e463SAndrew Isaacson 34f137e463SAndrew Isaacson unsigned int sb1_pass; 35f137e463SAndrew Isaacson unsigned int soc_pass; 36f137e463SAndrew Isaacson unsigned int soc_type; 37b45d5279SMaciej W. Rozycki EXPORT_SYMBOL(soc_type); 38f137e463SAndrew Isaacson unsigned int periph_rev; 39f137e463SAndrew Isaacson unsigned int zbbus_mhz; 40339c3a6aSRalf Baechle EXPORT_SYMBOL(zbbus_mhz); 41f137e463SAndrew Isaacson 42f137e463SAndrew Isaacson static unsigned int part_type; 43f137e463SAndrew Isaacson 44f137e463SAndrew Isaacson static char *soc_str; 45f137e463SAndrew Isaacson static char *pass_str; 46f137e463SAndrew Isaacson 477c4b4773SRalf Baechle static int __init setup_bcm1x80_bcm1x55(void) 48f137e463SAndrew Isaacson { 49f137e463SAndrew Isaacson int ret = 0; 50f137e463SAndrew Isaacson 51f137e463SAndrew Isaacson switch (soc_pass) { 52f137e463SAndrew Isaacson case K_SYS_REVISION_BCM1480_S0: 53f137e463SAndrew Isaacson periph_rev = 1; 54f137e463SAndrew Isaacson pass_str = "S0 (pass1)"; 55f137e463SAndrew Isaacson break; 56f137e463SAndrew Isaacson case K_SYS_REVISION_BCM1480_A1: 57f137e463SAndrew Isaacson periph_rev = 1; 58f137e463SAndrew Isaacson pass_str = "A1 (pass1)"; 59f137e463SAndrew Isaacson break; 60f137e463SAndrew Isaacson case K_SYS_REVISION_BCM1480_A2: 61f137e463SAndrew Isaacson periph_rev = 1; 62f137e463SAndrew Isaacson pass_str = "A2 (pass1)"; 63f137e463SAndrew Isaacson break; 64f137e463SAndrew Isaacson case K_SYS_REVISION_BCM1480_A3: 65f137e463SAndrew Isaacson periph_rev = 1; 66f137e463SAndrew Isaacson pass_str = "A3 (pass1)"; 67f137e463SAndrew Isaacson break; 68f137e463SAndrew Isaacson case K_SYS_REVISION_BCM1480_B0: 69f137e463SAndrew Isaacson periph_rev = 1; 70f137e463SAndrew Isaacson pass_str = "B0 (pass2)"; 71f137e463SAndrew Isaacson break; 72f137e463SAndrew Isaacson default: 7336a88530SRalf Baechle printk("Unknown %s rev %x\n", soc_str, soc_pass); 74f137e463SAndrew Isaacson periph_rev = 1; 75f137e463SAndrew Isaacson pass_str = "Unknown Revision"; 76f137e463SAndrew Isaacson break; 77f137e463SAndrew Isaacson } 787c4b4773SRalf Baechle 79f137e463SAndrew Isaacson return ret; 80f137e463SAndrew Isaacson } 81f137e463SAndrew Isaacson 827c4b4773SRalf Baechle /* Setup code likely to be common to all SiByte platforms */ 837c4b4773SRalf Baechle 847c4b4773SRalf Baechle static int __init sys_rev_decode(void) 857c4b4773SRalf Baechle { 867c4b4773SRalf Baechle int ret = 0; 877c4b4773SRalf Baechle 887c4b4773SRalf Baechle switch (soc_type) { 897c4b4773SRalf Baechle case K_SYS_SOC_TYPE_BCM1x80: 907c4b4773SRalf Baechle if (part_type == K_SYS_PART_BCM1480) 917c4b4773SRalf Baechle soc_str = "BCM1480"; 927c4b4773SRalf Baechle else if (part_type == K_SYS_PART_BCM1280) 937c4b4773SRalf Baechle soc_str = "BCM1280"; 947c4b4773SRalf Baechle else 957c4b4773SRalf Baechle soc_str = "BCM1x80"; 967c4b4773SRalf Baechle ret = setup_bcm1x80_bcm1x55(); 977c4b4773SRalf Baechle break; 987c4b4773SRalf Baechle 997c4b4773SRalf Baechle case K_SYS_SOC_TYPE_BCM1x55: 1007c4b4773SRalf Baechle if (part_type == K_SYS_PART_BCM1455) 1017c4b4773SRalf Baechle soc_str = "BCM1455"; 1027c4b4773SRalf Baechle else if (part_type == K_SYS_PART_BCM1255) 1037c4b4773SRalf Baechle soc_str = "BCM1255"; 1047c4b4773SRalf Baechle else 1057c4b4773SRalf Baechle soc_str = "BCM1x55"; 1067c4b4773SRalf Baechle ret = setup_bcm1x80_bcm1x55(); 1077c4b4773SRalf Baechle break; 1087c4b4773SRalf Baechle 1097c4b4773SRalf Baechle default: 1107c4b4773SRalf Baechle printk("Unknown part type %x\n", part_type); 1117c4b4773SRalf Baechle ret = 1; 1127c4b4773SRalf Baechle break; 1137c4b4773SRalf Baechle } 1147c4b4773SRalf Baechle 1157c4b4773SRalf Baechle return ret; 1167c4b4773SRalf Baechle } 1177c4b4773SRalf Baechle 1187c4b4773SRalf Baechle void __init bcm1480_setup(void) 119f137e463SAndrew Isaacson { 120f137e463SAndrew Isaacson uint64_t sys_rev; 121f137e463SAndrew Isaacson int plldiv; 122f137e463SAndrew Isaacson 1238ff374b9SMaciej W. Rozycki sb1_pass = read_c0_prid() & PRID_REV_MASK; 124f137e463SAndrew Isaacson sys_rev = __raw_readq(IOADDR(A_SCD_SYSTEM_REVISION)); 125f137e463SAndrew Isaacson soc_type = SYS_SOC_TYPE(sys_rev); 126f137e463SAndrew Isaacson part_type = G_SYS_PART(sys_rev); 127f137e463SAndrew Isaacson soc_pass = G_SYS_REVISION(sys_rev); 128f137e463SAndrew Isaacson 129f137e463SAndrew Isaacson if (sys_rev_decode()) { 13036a88530SRalf Baechle printk("Restart after failure to identify SiByte chip\n"); 131f137e463SAndrew Isaacson machine_restart(NULL); 132f137e463SAndrew Isaacson } 133f137e463SAndrew Isaacson 134f137e463SAndrew Isaacson plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG))); 135f137e463SAndrew Isaacson zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25); 136f137e463SAndrew Isaacson 13736a88530SRalf Baechle printk("Broadcom SiByte %s %s @ %d MHz (SB-1A rev %d)\n", 138f137e463SAndrew Isaacson soc_str, pass_str, zbbus_mhz * 2, sb1_pass); 13936a88530SRalf Baechle printk("Board type: %s\n", get_system_type()); 140f137e463SAndrew Isaacson } 141