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, name: "bcsr");
48 if (np != NULL) {
49 static u8 __iomem *bcsr_regs;
50
51 bcsr_regs = of_iomap(node: np, index: 0);
52 of_node_put(node: 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(addr: 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};
108

source code of linux/arch/powerpc/platforms/85xx/p1023_rdb.c