2 * Copyright (C) 2000,2001,2002,2003,2004 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/kernel.h>
19 #include <linux/reboot.h>
20 #include <linux/string.h>
22 #include <asm/bootinfo.h>
23 #include <asm/mipsregs.h>
25 #include <asm/sibyte/sb1250.h>
27 #include <asm/sibyte/bcm1480_regs.h>
28 #include <asm/sibyte/bcm1480_scd.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;
37 static unsigned int part_type;
40 static char *pass_str;
42 static inline int setup_bcm1x80_bcm1x55(void);
44 /* Setup code likely to be common to all SiByte platforms */
46 static inline int sys_rev_decode(void)
51 case K_SYS_SOC_TYPE_BCM1x80:
52 if (part_type == K_SYS_PART_BCM1480)
54 else if (part_type == K_SYS_PART_BCM1280)
58 ret = setup_bcm1x80_bcm1x55();
61 case K_SYS_SOC_TYPE_BCM1x55:
62 if (part_type == K_SYS_PART_BCM1455)
64 else if (part_type == K_SYS_PART_BCM1255)
68 ret = setup_bcm1x80_bcm1x55();
72 prom_printf("Unknown part type %x\n", part_type);
79 static inline int setup_bcm1x80_bcm1x55(void)
84 case K_SYS_REVISION_BCM1480_S0:
86 pass_str = "S0 (pass1)";
88 case K_SYS_REVISION_BCM1480_A1:
90 pass_str = "A1 (pass1)";
92 case K_SYS_REVISION_BCM1480_A2:
94 pass_str = "A2 (pass1)";
96 case K_SYS_REVISION_BCM1480_A3:
98 pass_str = "A3 (pass1)";
100 case K_SYS_REVISION_BCM1480_B0:
102 pass_str = "B0 (pass2)";
105 prom_printf("Unknown %s rev %x\n", soc_str, soc_pass);
107 pass_str = "Unknown Revision";
113 void bcm1480_setup(void)
118 sb1_pass = read_c0_prid() & 0xff;
119 sys_rev = __raw_readq(IOADDR(A_SCD_SYSTEM_REVISION));
120 soc_type = SYS_SOC_TYPE(sys_rev);
121 part_type = G_SYS_PART(sys_rev);
122 soc_pass = G_SYS_REVISION(sys_rev);
124 if (sys_rev_decode()) {
125 prom_printf("Restart after failure to identify SiByte chip\n");
126 machine_restart(NULL);
129 plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
130 zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25);
132 prom_printf("Broadcom SiByte %s %s @ %d MHz (SB-1A rev %d)\n",
133 soc_str, pass_str, zbbus_mhz * 2, sb1_pass);
134 prom_printf("Board type: %s\n", get_system_type());