2 * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 #include <linux/config.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/reboot.h>
22 #include <linux/string.h>
24 #include <asm/bootinfo.h>
25 #include <asm/mipsregs.h>
27 #include <asm/sibyte/sb1250.h>
28 #include <asm/sibyte/sb1250_regs.h>
29 #include <asm/sibyte/sb1250_scd.h>
31 unsigned int sb1_pass;
32 unsigned int soc_pass;
33 unsigned int soc_type;
34 unsigned int periph_rev;
35 unsigned int zbbus_mhz;
38 static char *pass_str;
39 static unsigned int war_pass; /* XXXKW don't overload PASS defines? */
41 static inline int setup_bcm1250(void);
42 static inline int setup_bcm112x(void);
44 /* Setup code likely to be common to all SiByte platforms */
46 static int __init sys_rev_decode(void)
52 case K_SYS_SOC_TYPE_BCM1250:
53 case K_SYS_SOC_TYPE_BCM1250_ALT:
54 case K_SYS_SOC_TYPE_BCM1250_ALT2:
56 ret = setup_bcm1250();
58 case K_SYS_SOC_TYPE_BCM1120:
60 ret = setup_bcm112x();
62 case K_SYS_SOC_TYPE_BCM1125:
64 ret = setup_bcm112x();
66 case K_SYS_SOC_TYPE_BCM1125H:
68 ret = setup_bcm112x();
71 prom_printf("Unknown SOC type %x\n", soc_type);
78 static int __init setup_bcm1250(void)
83 case K_SYS_REVISION_BCM1250_PASS1:
87 case K_SYS_REVISION_BCM1250_A10:
90 /* XXXKW different war_pass? */
91 war_pass = K_SYS_REVISION_BCM1250_PASS2;
93 case K_SYS_REVISION_BCM1250_PASS2_2:
97 case K_SYS_REVISION_BCM1250_B2:
100 war_pass = K_SYS_REVISION_BCM1250_PASS2_2;
102 case K_SYS_REVISION_BCM1250_PASS3:
106 case K_SYS_REVISION_BCM1250_C1:
111 if (soc_pass < K_SYS_REVISION_BCM1250_PASS2_2) {
114 war_pass = K_SYS_REVISION_BCM1250_PASS2;
116 prom_printf("Unknown BCM1250 rev %x\n", soc_pass);
124 static int __init setup_bcm112x(void)
130 /* Early build didn't have revid set */
133 war_pass = K_SYS_REVISION_BCM112x_A1;
135 case K_SYS_REVISION_BCM112x_A1:
139 case K_SYS_REVISION_BCM112x_A2:
144 prom_printf("Unknown %s rev %x\n", soc_str, soc_pass);
150 void __init sb1250_setup(void)
156 sb1_pass = read_c0_prid() & 0xff;
157 sys_rev = __raw_readq(IOADDR(A_SCD_SYSTEM_REVISION));
158 soc_type = SYS_SOC_TYPE(sys_rev);
159 soc_pass = G_SYS_REVISION(sys_rev);
161 if (sys_rev_decode()) {
162 prom_printf("Restart after failure to identify SiByte chip\n");
163 machine_restart(NULL);
166 plldiv = G_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
167 zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25);
169 prom_printf("Broadcom SiByte %s %s @ %d MHz (SB1 rev %d)\n",
170 soc_str, pass_str, zbbus_mhz * 2, sb1_pass);
171 prom_printf("Board type: %s\n", get_system_type());
174 case K_SYS_REVISION_BCM1250_PASS1:
175 #ifndef CONFIG_SB1_PASS_1_WORKAROUNDS
176 prom_printf("@@@@ This is a BCM1250 A0-A2 (Pass 1) board, "
177 "and the kernel doesn't have the proper "
178 "workarounds compiled in. @@@@\n");
182 case K_SYS_REVISION_BCM1250_PASS2:
183 /* Pass 2 - easiest as default for now - so many numbers */
184 #if !defined(CONFIG_SB1_PASS_2_WORKAROUNDS) || \
185 !defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS)
186 prom_printf("@@@@ This is a BCM1250 A3-A10 board, and the "
187 "kernel doesn't have the proper workarounds "
188 "compiled in. @@@@\n");
191 #ifdef CONFIG_CPU_HAS_PREFETCH
192 prom_printf("@@@@ Prefetches may be enabled in this kernel, "
193 "but are buggy on this board. @@@@\n");
197 case K_SYS_REVISION_BCM1250_PASS2_2:
198 #ifndef CONFIG_SB1_PASS_2_WORKAROUNDS
199 prom_printf("@@@@ This is a BCM1250 B1/B2. board, and the "
200 "kernel doesn't have the proper workarounds "
201 "compiled in. @@@@\n");
204 #if defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS) || \
205 !defined(CONFIG_CPU_HAS_PREFETCH)
206 prom_printf("@@@@ This is a BCM1250 B1/B2, but the kernel is "
207 "conservatively configured for an 'A' stepping. "
215 prom_printf("Invalid configuration for this chip.\n");
216 machine_restart(NULL);