p1023_rdb.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Copyright 2010-2011, 2013 Freescale Semiconductor, Inc.
  4 *
  5 * Author: Roy Zang <tie-fei.zang@freescale.com>
  6 *
  7 * Description:
  8 * P1023 RDB Board Setup
  9 */
 10
 11#include <linux/kernel.h>
 12#include <linux/init.h>
 13#include <linux/errno.h>
 14#include <linux/pci.h>
 15#include <linux/delay.h>
 16#include <linux/module.h>
 17#include <linux/fsl_devices.h>
 18#include <linux/of.h>
 19#include <linux/of_address.h>
 20
 21#include <asm/time.h>
 22#include <asm/machdep.h>
 23#include <asm/pci-bridge.h>
 24#include <mm/mmu_decl.h>
 25#include <asm/udbg.h>
 26#include <asm/mpic.h>
 27#include "smp.h"
 28
 29#include <sysdev/fsl_soc.h>
 30#include <sysdev/fsl_pci.h>
 31
 32#include "mpc85xx.h"
 33
 34/* ************************************************************************
 35 *
 36 * Setup the architecture
 37 *
 38 */
 39static void __init p1023_rdb_setup_arch(void)
 40{
 41	struct device_node *np;
 42
 43	if (ppc_md.progress)
 44		ppc_md.progress("p1023_rdb_setup_arch()", 0);
 45
 46	/* Map BCSR area */
 47	np = of_find_node_by_name(NULL, "bcsr");
 48	if (np != NULL) {
 49		static u8 __iomem *bcsr_regs;
 50
 51		bcsr_regs = of_iomap(np, 0);
 52		of_node_put(np);
 53
 54		if (!bcsr_regs) {
 55			printk(KERN_ERR
 56			       "BCSR: Failed to map bcsr register space\n");
 57			return;
 58		} else {
 59#define BCSR15_I2C_BUS0_SEG_CLR		0x07
 60#define BCSR15_I2C_BUS0_SEG2		0x02
 61/*
 62 * Note: Accessing exclusively i2c devices.
 63 *
 64 * The i2c controller selects initially ID EEPROM in the u-boot;
 65 * but if menu configuration selects RTC support in the kernel,
 66 * the i2c controller switches to select RTC chip in the kernel.
 67 */
 68#ifdef CONFIG_RTC_CLASS
 69			/* Enable RTC chip on the segment #2 of i2c */
 70			clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR);
 71			setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2);
 72#endif
 73
 74			iounmap(bcsr_regs);
 75		}
 76	}
 77
 78	mpc85xx_smp_init();
 79
 80	fsl_pci_assign_primary();
 81}
 82
 83machine_arch_initcall(p1023_rdb, mpc85xx_common_publish_devices);
 84
 85static void __init p1023_rdb_pic_init(void)
 86{
 87	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 88		MPIC_SINGLE_DEST_CPU,
 89		0, 256, " OpenPIC  ");
 90
 91	BUG_ON(mpic == NULL);
 92
 93	mpic_init(mpic);
 94}
 95
 96define_machine(p1023_rdb) {
 97	.name			= "P1023 RDB",
 98	.compatible		= "fsl,P1023RDB",
 99	.setup_arch		= p1023_rdb_setup_arch,
100	.init_IRQ		= p1023_rdb_pic_init,
101	.get_irq		= mpic_get_irq,
102	.progress		= udbg_progress,
103#ifdef CONFIG_PCI
104	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
105	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
106#endif
107};