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 */ 18f137e463SAndrew Isaacson #include <linux/kernel.h> 1931185131SRalf Baechle #include <linux/module.h> 20f137e463SAndrew Isaacson #include <linux/reboot.h> 21f137e463SAndrew Isaacson #include <linux/string.h> 22f137e463SAndrew Isaacson 23f137e463SAndrew Isaacson #include <asm/bootinfo.h> 24f137e463SAndrew Isaacson #include <asm/mipsregs.h> 25f137e463SAndrew Isaacson #include <asm/io.h> 26f137e463SAndrew Isaacson #include <asm/sibyte/sb1250.h> 27f137e463SAndrew Isaacson 28f137e463SAndrew Isaacson #include <asm/sibyte/bcm1480_regs.h> 29f137e463SAndrew Isaacson #include <asm/sibyte/bcm1480_scd.h> 30f137e463SAndrew Isaacson #include <asm/sibyte/sb1250_scd.h> 31f137e463SAndrew Isaacson 32f137e463SAndrew Isaacson unsigned int sb1_pass; 33f137e463SAndrew Isaacson unsigned int soc_pass; 34f137e463SAndrew Isaacson unsigned int soc_type; 35b45d5279SMaciej W. Rozycki EXPORT_SYMBOL(soc_type); 36f137e463SAndrew Isaacson unsigned int periph_rev; 37f137e463SAndrew Isaacson unsigned int zbbus_mhz; 38f137e463SAndrew Isaacson 39f137e463SAndrew Isaacson static unsigned int part_type; 40f137e463SAndrew Isaacson 41f137e463SAndrew Isaacson static char *soc_str; 42f137e463SAndrew Isaacson static char *pass_str; 43f137e463SAndrew Isaacson 44f137e463SAndrew Isaacson static inline int setup_bcm1x80_bcm1x55(void); 45f137e463SAndrew Isaacson 46f137e463SAndrew Isaacson /* Setup code likely to be common to all SiByte platforms */ 47f137e463SAndrew Isaacson 48f137e463SAndrew Isaacson static inline int sys_rev_decode(void) 49f137e463SAndrew Isaacson { 50f137e463SAndrew Isaacson int ret = 0; 51f137e463SAndrew Isaacson 52f137e463SAndrew Isaacson switch (soc_type) { 53f137e463SAndrew Isaacson case K_SYS_SOC_TYPE_BCM1x80: 54f137e463SAndrew Isaacson if (part_type == K_SYS_PART_BCM1480) 55f137e463SAndrew Isaacson soc_str = "BCM1480"; 56f137e463SAndrew Isaacson else if (part_type == K_SYS_PART_BCM1280) 57f137e463SAndrew Isaacson soc_str = "BCM1280"; 58f137e463SAndrew Isaacson else 59f137e463SAndrew Isaacson soc_str = "BCM1x80"; 60f137e463SAndrew Isaacson ret = setup_bcm1x80_bcm1x55(); 61f137e463SAndrew Isaacson break; 62f137e463SAndrew Isaacson 63f137e463SAndrew Isaacson case K_SYS_SOC_TYPE_BCM1x55: 64f137e463SAndrew Isaacson if (part_type == K_SYS_PART_BCM1455) 65f137e463SAndrew Isaacson soc_str = "BCM1455"; 66f137e463SAndrew Isaacson else if (part_type == K_SYS_PART_BCM1255) 67f137e463SAndrew Isaacson soc_str = "BCM1255"; 68f137e463SAndrew Isaacson else 69f137e463SAndrew Isaacson soc_str = "BCM1x55"; 70f137e463SAndrew Isaacson ret = setup_bcm1x80_bcm1x55(); 71f137e463SAndrew Isaacson break; 72f137e463SAndrew Isaacson 73f137e463SAndrew Isaacson default: 7436a88530SRalf Baechle printk("Unknown part type %x\n", part_type); 75f137e463SAndrew Isaacson ret = 1; 76f137e463SAndrew Isaacson break; 77f137e463SAndrew Isaacson } 78f137e463SAndrew Isaacson return ret; 79f137e463SAndrew Isaacson } 80f137e463SAndrew Isaacson 81f137e463SAndrew Isaacson static inline int setup_bcm1x80_bcm1x55(void) 82f137e463SAndrew Isaacson { 83f137e463SAndrew Isaacson int ret = 0; 84f137e463SAndrew Isaacson 85f137e463SAndrew Isaacson switch (soc_pass) { 86f137e463SAndrew Isaacson case K_SYS_REVISION_BCM1480_S0: 87f137e463SAndrew Isaacson periph_rev = 1; 88f137e463SAndrew Isaacson pass_str = "S0 (pass1)"; 89f137e463SAndrew Isaacson break; 90f137e463SAndrew Isaacson case K_SYS_REVISION_BCM1480_A1: 91f137e463SAndrew Isaacson periph_rev = 1; 92f137e463SAndrew Isaacson pass_str = "A1 (pass1)"; 93f137e463SAndrew Isaacson break; 94f137e463SAndrew Isaacson case K_SYS_REVISION_BCM1480_A2: 95f137e463SAndrew Isaacson periph_rev = 1; 96f137e463SAndrew Isaacson pass_str = "A2 (pass1)"; 97f137e463SAndrew Isaacson break; 98f137e463SAndrew Isaacson case K_SYS_REVISION_BCM1480_A3: 99f137e463SAndrew Isaacson periph_rev = 1; 100f137e463SAndrew Isaacson pass_str = "A3 (pass1)"; 101f137e463SAndrew Isaacson break; 102f137e463SAndrew Isaacson case K_SYS_REVISION_BCM1480_B0: 103f137e463SAndrew Isaacson periph_rev = 1; 104f137e463SAndrew Isaacson pass_str = "B0 (pass2)"; 105f137e463SAndrew Isaacson break; 106f137e463SAndrew Isaacson default: 10736a88530SRalf Baechle printk("Unknown %s rev %x\n", soc_str, soc_pass); 108f137e463SAndrew Isaacson periph_rev = 1; 109f137e463SAndrew Isaacson pass_str = "Unknown Revision"; 110f137e463SAndrew Isaacson break; 111f137e463SAndrew Isaacson } 112f137e463SAndrew Isaacson return ret; 113f137e463SAndrew Isaacson } 114f137e463SAndrew Isaacson 115f137e463SAndrew Isaacson void bcm1480_setup(void) 116f137e463SAndrew Isaacson { 117f137e463SAndrew Isaacson uint64_t sys_rev; 118f137e463SAndrew Isaacson int plldiv; 119f137e463SAndrew Isaacson 120f137e463SAndrew Isaacson sb1_pass = read_c0_prid() & 0xff; 121f137e463SAndrew Isaacson sys_rev = __raw_readq(IOADDR(A_SCD_SYSTEM_REVISION)); 122f137e463SAndrew Isaacson soc_type = SYS_SOC_TYPE(sys_rev); 123f137e463SAndrew Isaacson part_type = G_SYS_PART(sys_rev); 124f137e463SAndrew Isaacson soc_pass = G_SYS_REVISION(sys_rev); 125f137e463SAndrew Isaacson 126f137e463SAndrew Isaacson if (sys_rev_decode()) { 12736a88530SRalf Baechle printk("Restart after failure to identify SiByte chip\n"); 128f137e463SAndrew Isaacson machine_restart(NULL); 129f137e463SAndrew Isaacson } 130f137e463SAndrew Isaacson 131f137e463SAndrew Isaacson plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG))); 132f137e463SAndrew Isaacson zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25); 133f137e463SAndrew Isaacson 13436a88530SRalf Baechle printk("Broadcom SiByte %s %s @ %d MHz (SB-1A rev %d)\n", 135f137e463SAndrew Isaacson soc_str, pass_str, zbbus_mhz * 2, sb1_pass); 13636a88530SRalf Baechle printk("Board type: %s\n", get_system_type()); 137f137e463SAndrew Isaacson } 138