1 /*
2 * SBC8641D board specific routines
3 *
4 * Copyright 2008 Wind River Systems Inc.
5 *
6 * By Paul Gortmaker (see MAINTAINERS for contact information)
7 *
8 * Based largely on the 8641 HPCN support by Freescale Semiconductor Inc.
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 */
15
16 #include <linux/stddef.h>
17 #include <linux/kernel.h>
18 #include <linux/pci.h>
19 #include <linux/kdev_t.h>
20 #include <linux/delay.h>
21 #include <linux/seq_file.h>
22 #include <linux/of_platform.h>
23
24 #include <asm/time.h>
25 #include <asm/machdep.h>
26 #include <asm/pci-bridge.h>
27 #include <asm/prom.h>
28 #include <mm/mmu_decl.h>
29 #include <asm/udbg.h>
30
31 #include <asm/mpic.h>
32
33 #include <sysdev/fsl_pci.h>
34 #include <sysdev/fsl_soc.h>
35
36 #include "mpc86xx.h"
37
38 static void __init
sbc8641_setup_arch(void)39 sbc8641_setup_arch(void)
40 {
41 #ifdef CONFIG_PCI
42 struct device_node *np;
43 #endif
44
45 if (ppc_md.progress)
46 ppc_md.progress("sbc8641_setup_arch()", 0);
47
48 #ifdef CONFIG_PCI
49 for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie")
50 fsl_add_bridge(np, 0);
51 #endif
52
53 printk("SBC8641 board from Wind River\n");
54
55 #ifdef CONFIG_SMP
56 mpc86xx_smp_init();
57 #endif
58 }
59
60
61 static void
sbc8641_show_cpuinfo(struct seq_file * m)62 sbc8641_show_cpuinfo(struct seq_file *m)
63 {
64 uint svid = mfspr(SPRN_SVR);
65
66 seq_printf(m, "Vendor\t\t: Wind River Systems\n");
67
68 seq_printf(m, "SVR\t\t: 0x%x\n", svid);
69 }
70
71
72 /*
73 * Called very early, device-tree isn't unflattened
74 */
sbc8641_probe(void)75 static int __init sbc8641_probe(void)
76 {
77 unsigned long root = of_get_flat_dt_root();
78
79 if (of_flat_dt_is_compatible(root, "wind,sbc8641"))
80 return 1; /* Looks good */
81
82 return 0;
83 }
84
85 static long __init
mpc86xx_time_init(void)86 mpc86xx_time_init(void)
87 {
88 unsigned int temp;
89
90 /* Set the time base to zero */
91 mtspr(SPRN_TBWL, 0);
92 mtspr(SPRN_TBWU, 0);
93
94 temp = mfspr(SPRN_HID0);
95 temp |= HID0_TBEN;
96 mtspr(SPRN_HID0, temp);
97 asm volatile("isync");
98
99 return 0;
100 }
101
102 static __initdata struct of_device_id of_bus_ids[] = {
103 { .compatible = "simple-bus", },
104 { .compatible = "gianfar", },
105 {},
106 };
107
declare_of_platform_devices(void)108 static int __init declare_of_platform_devices(void)
109 {
110 of_platform_bus_probe(NULL, of_bus_ids, NULL);
111
112 return 0;
113 }
114 machine_device_initcall(sbc8641, declare_of_platform_devices);
115
define_machine(sbc8641)116 define_machine(sbc8641) {
117 .name = "SBC8641D",
118 .probe = sbc8641_probe,
119 .setup_arch = sbc8641_setup_arch,
120 .init_IRQ = mpc86xx_init_irq,
121 .show_cpuinfo = sbc8641_show_cpuinfo,
122 .get_irq = mpic_get_irq,
123 .restart = fsl_rstcr_restart,
124 .time_init = mpc86xx_time_init,
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