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_platform.h>
19#include <linux/of_device.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/prom.h>
26#include <asm/udbg.h>
27#include <asm/mpic.h>
28#include "smp.h"
29
30#include <sysdev/fsl_soc.h>
31#include <sysdev/fsl_pci.h>
32
33#include "mpc85xx.h"
34
35/* ************************************************************************
36 *
37 * Setup the architecture
38 *
39 */
40static void __init mpc85xx_rdb_setup_arch(void)
41{
42	struct device_node *np;
43
44	if (ppc_md.progress)
45		ppc_md.progress("p1023_rdb_setup_arch()", 0);
46
47	/* Map BCSR area */
48	np = of_find_node_by_name(NULL, "bcsr");
49	if (np != NULL) {
50		static u8 __iomem *bcsr_regs;
51
52		bcsr_regs = of_iomap(np, 0);
53		of_node_put(np);
54
55		if (!bcsr_regs) {
56			printk(KERN_ERR
57			       "BCSR: Failed to map bcsr register space\n");
58			return;
59		} else {
60#define BCSR15_I2C_BUS0_SEG_CLR		0x07
61#define BCSR15_I2C_BUS0_SEG2		0x02
62/*
63 * Note: Accessing exclusively i2c devices.
64 *
65 * The i2c controller selects initially ID EEPROM in the u-boot;
66 * but if menu configuration selects RTC support in the kernel,
67 * the i2c controller switches to select RTC chip in the kernel.
68 */
69#ifdef CONFIG_RTC_CLASS
70			/* Enable RTC chip on the segment #2 of i2c */
71			clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR);
72			setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2);
73#endif
74
75			iounmap(bcsr_regs);
76		}
77	}
78
79	mpc85xx_smp_init();
80
81	fsl_pci_assign_primary();
82}
83
84machine_arch_initcall(p1023_rdb, mpc85xx_common_publish_devices);
85
86static void __init mpc85xx_rdb_pic_init(void)
87{
88	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
89		MPIC_SINGLE_DEST_CPU,
90		0, 256, " OpenPIC  ");
91
92	BUG_ON(mpic == NULL);
93
94	mpic_init(mpic);
95}
96
97static int __init p1023_rdb_probe(void)
98{
99	return of_machine_is_compatible("fsl,P1023RDB");
100
101}
102
103define_machine(p1023_rdb) {
104	.name			= "P1023 RDB",
105	.probe			= p1023_rdb_probe,
106	.setup_arch		= mpc85xx_rdb_setup_arch,
107	.init_IRQ		= mpc85xx_rdb_pic_init,
108	.get_irq		= mpic_get_irq,
109	.calibrate_decr		= generic_calibrate_decr,
110	.progress		= udbg_progress,
111#ifdef CONFIG_PCI
112	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
113	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
114#endif
115};
116