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