1 /*
2  * Copyright 2010-2011, 2013 Freescale Semiconductor, Inc.
3  *
4  * Author: Roy Zang <tie-fei.zang@freescale.com>
5  *
6  * Description:
7  * P1023 RDB 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  */
44 static void __init mpc85xx_rdb_setup_arch(void)
45 {
46 	struct device_node *np;
47 
48 	if (ppc_md.progress)
49 		ppc_md.progress("p1023_rdb_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 
88 machine_arch_initcall(p1023_rdb, mpc85xx_common_publish_devices);
89 
90 static void __init mpc85xx_rdb_pic_init(void)
91 {
92 	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
93 		MPIC_SINGLE_DEST_CPU,
94 		0, 256, " OpenPIC  ");
95 
96 	BUG_ON(mpic == NULL);
97 
98 	mpic_init(mpic);
99 }
100 
101 static int __init p1023_rdb_probe(void)
102 {
103 	return of_machine_is_compatible("fsl,P1023RDB");
104 
105 }
106 
107 define_machine(p1023_rdb) {
108 	.name			= "P1023 RDB",
109 	.probe			= p1023_rdb_probe,
110 	.setup_arch		= mpc85xx_rdb_setup_arch,
111 	.init_IRQ		= mpc85xx_rdb_pic_init,
112 	.get_irq		= mpic_get_irq,
113 	.restart		= fsl_rstcr_restart,
114 	.calibrate_decr		= generic_calibrate_decr,
115 	.progress		= udbg_progress,
116 #ifdef CONFIG_PCI
117 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
118 	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
119 #endif
120 };
121