summaryrefslogtreecommitdiffstats
path: root/arch/mips/sibyte/bcm1480/setup.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--arch/mips/sibyte/bcm1480/setup.c126
1 files changed, 126 insertions, 0 deletions
diff --git a/arch/mips/sibyte/bcm1480/setup.c b/arch/mips/sibyte/bcm1480/setup.c
new file mode 100644
index 000000000..e3e807046
--- /dev/null
+++ b/arch/mips/sibyte/bcm1480/setup.c
@@ -0,0 +1,126 @@
+// 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());
+}