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/arch/powerpc/platforms/85xx/p1023_rds.c

http://github.com/mirrors/linux
C | 144 lines | 93 code | 24 blank | 27 comment | 6 complexity | 38b455a78a696f5b55a0ee4df015cddf MD5 | raw file
  1/*
  2 * Copyright 2010-2011, 2013 Freescale Semiconductor, Inc.
  3 *
  4 * Author: Roy Zang <tie-fei.zang@freescale.com>
  5 *
  6 * Description:
  7 * P1023 RDS Board Setup
  8 *
  9 * This program is free software; you can redistribute  it and/or modify it
 10 * under  the terms of  the GNU General  Public License as published by the
 11 * Free Software Foundation;  either version 2 of the  License, or (at your
 12 * option) any later version.
 13 */
 14
 15#include <linux/kernel.h>
 16#include <linux/init.h>
 17#include <linux/errno.h>
 18#include <linux/pci.h>
 19#include <linux/delay.h>
 20#include <linux/module.h>
 21#include <linux/fsl_devices.h>
 22#include <linux/of_platform.h>
 23#include <linux/of_device.h>
 24
 25#include <asm/time.h>
 26#include <asm/machdep.h>
 27#include <asm/pci-bridge.h>
 28#include <mm/mmu_decl.h>
 29#include <asm/prom.h>
 30#include <asm/udbg.h>
 31#include <asm/mpic.h>
 32#include "smp.h"
 33
 34#include <sysdev/fsl_soc.h>
 35#include <sysdev/fsl_pci.h>
 36
 37#include "mpc85xx.h"
 38
 39/* ************************************************************************
 40 *
 41 * Setup the architecture
 42 *
 43 */
 44static void __init mpc85xx_rds_setup_arch(void)
 45{
 46	struct device_node *np;
 47
 48	if (ppc_md.progress)
 49		ppc_md.progress("p1023_rds_setup_arch()", 0);
 50
 51	/* Map BCSR area */
 52	np = of_find_node_by_name(NULL, "bcsr");
 53	if (np != NULL) {
 54		static u8 __iomem *bcsr_regs;
 55
 56		bcsr_regs = of_iomap(np, 0);
 57		of_node_put(np);
 58
 59		if (!bcsr_regs) {
 60			printk(KERN_ERR
 61			       "BCSR: Failed to map bcsr register space\n");
 62			return;
 63		} else {
 64#define BCSR15_I2C_BUS0_SEG_CLR		0x07
 65#define BCSR15_I2C_BUS0_SEG2		0x02
 66/*
 67 * Note: Accessing exclusively i2c devices.
 68 *
 69 * The i2c controller selects initially ID EEPROM in the u-boot;
 70 * but if menu configuration selects RTC support in the kernel,
 71 * the i2c controller switches to select RTC chip in the kernel.
 72 */
 73#ifdef CONFIG_RTC_CLASS
 74			/* Enable RTC chip on the segment #2 of i2c */
 75			clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR);
 76			setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2);
 77#endif
 78
 79			iounmap(bcsr_regs);
 80		}
 81	}
 82
 83	mpc85xx_smp_init();
 84
 85	fsl_pci_assign_primary();
 86}
 87
 88machine_arch_initcall(p1023_rds, mpc85xx_common_publish_devices);
 89machine_arch_initcall(p1023_rdb, mpc85xx_common_publish_devices);
 90
 91static void __init mpc85xx_rds_pic_init(void)
 92{
 93	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 94		MPIC_SINGLE_DEST_CPU,
 95		0, 256, " OpenPIC  ");
 96
 97	BUG_ON(mpic == NULL);
 98
 99	mpic_init(mpic);
100}
101
102static int __init p1023_rds_probe(void)
103{
104	unsigned long root = of_get_flat_dt_root();
105
106	return of_flat_dt_is_compatible(root, "fsl,P1023RDS");
107
108}
109
110static int __init p1023_rdb_probe(void)
111{
112	unsigned long root = of_get_flat_dt_root();
113
114	return of_flat_dt_is_compatible(root, "fsl,P1023RDB");
115
116}
117
118define_machine(p1023_rds) {
119	.name			= "P1023 RDS",
120	.probe			= p1023_rds_probe,
121	.setup_arch		= mpc85xx_rds_setup_arch,
122	.init_IRQ		= mpc85xx_rds_pic_init,
123	.get_irq		= mpic_get_irq,
124	.restart		= fsl_rstcr_restart,
125	.calibrate_decr		= generic_calibrate_decr,
126	.progress		= udbg_progress,
127#ifdef CONFIG_PCI
128	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
129#endif
130};
131
132define_machine(p1023_rdb) {
133	.name			= "P1023 RDB",
134	.probe			= p1023_rdb_probe,
135	.setup_arch		= mpc85xx_rds_setup_arch,
136	.init_IRQ		= mpc85xx_rds_pic_init,
137	.get_irq		= mpic_get_irq,
138	.restart		= fsl_rstcr_restart,
139	.calibrate_decr		= generic_calibrate_decr,
140	.progress		= udbg_progress,
141#ifdef CONFIG_PCI
142	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
143#endif
144};