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 */
mpc85xx_rdb_setup_arch(void)40 static 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
84 machine_arch_initcall(p1023_rdb, mpc85xx_common_publish_devices);
85
mpc85xx_rdb_pic_init(void)86 static 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
p1023_rdb_probe(void)97 static int __init p1023_rdb_probe(void)
98 {
99 return of_machine_is_compatible("fsl,P1023RDB");
100
101 }
102
define_machine(p1023_rdb)103 define_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