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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2000,2001,2002,2003,2004 Broadcom Corporation
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/reboot.h>
#include <linux/string.h>
#include <asm/bootinfo.h>
#include <asm/cpu.h>
#include <asm/mipsregs.h>
#include <asm/io.h>
#include <asm/sibyte/sb1250.h>
#include <asm/sibyte/bcm1480_regs.h>
#include <asm/sibyte/bcm1480_scd.h>
#include <asm/sibyte/sb1250_scd.h>
unsigned int sb1_pass;
unsigned int soc_pass;
unsigned int soc_type;
EXPORT_SYMBOL(soc_type);
unsigned int periph_rev;
EXPORT_SYMBOL_GPL(periph_rev);
unsigned int zbbus_mhz;
EXPORT_SYMBOL(zbbus_mhz);
static unsigned int part_type;
static char *soc_str;
static char *pass_str;
static int __init setup_bcm1x80_bcm1x55(void)
{
switch (soc_pass) {
case K_SYS_REVISION_BCM1480_S0:
periph_rev = 1;
pass_str = "S0 (pass1)";
break;
case K_SYS_REVISION_BCM1480_A1:
periph_rev = 1;
pass_str = "A1 (pass1)";
break;
case K_SYS_REVISION_BCM1480_A2:
periph_rev = 1;
pass_str = "A2 (pass1)";
break;
case K_SYS_REVISION_BCM1480_A3:
periph_rev = 1;
pass_str = "A3 (pass1)";
break;
case K_SYS_REVISION_BCM1480_B0:
periph_rev = 1;
pass_str = "B0 (pass2)";
break;
default:
printk("Unknown %s rev %x\n", soc_str, soc_pass);
periph_rev = 1;
pass_str = "Unknown Revision";
break;
}
return 0;
}
/* Setup code likely to be common to all SiByte platforms */
static int __init sys_rev_decode(void)
{
int ret = 0;
switch (soc_type) {
case K_SYS_SOC_TYPE_BCM1x80:
if (part_type == K_SYS_PART_BCM1480)
soc_str = "BCM1480";
else if (part_type == K_SYS_PART_BCM1280)
soc_str = "BCM1280";
else
soc_str = "BCM1x80";
ret = setup_bcm1x80_bcm1x55();
break;
case K_SYS_SOC_TYPE_BCM1x55:
if (part_type == K_SYS_PART_BCM1455)
soc_str = "BCM1455";
else if (part_type == K_SYS_PART_BCM1255)
soc_str = "BCM1255";
else
soc_str = "BCM1x55";
ret = setup_bcm1x80_bcm1x55();
break;
default:
printk("Unknown part type %x\n", part_type);
ret = 1;
break;
}
return ret;
}
void __init bcm1480_setup(void)
{
uint64_t sys_rev;
int plldiv;
sb1_pass = read_c0_prid() & PRID_REV_MASK;
sys_rev = __raw_readq(IOADDR(A_SCD_SYSTEM_REVISION));
soc_type = SYS_SOC_TYPE(sys_rev);
part_type = G_SYS_PART(sys_rev);
soc_pass = G_SYS_REVISION(sys_rev);
if (sys_rev_decode()) {
printk("Restart after failure to identify SiByte chip\n");
machine_restart(NULL);
}
plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25);
printk("Broadcom SiByte %s %s @ %d MHz (SB-1A rev %d)\n",
soc_str, pass_str, zbbus_mhz * 2, sb1_pass);
printk("Board type: %s\n", get_system_type());
}
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