1 /*
2 * Wind River SBC8548 setup and early boot code.
3 *
4 * Copyright 2007 Wind River Systems Inc.
5 *
6 * By Paul Gortmaker (see MAINTAINERS for contact information)
7 *
8 * Based largely on the MPC8548CDS support - Copyright 2005 Freescale Inc.
9 *
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 */
16
17 #include <linux/stddef.h>
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/errno.h>
21 #include <linux/reboot.h>
22 #include <linux/pci.h>
23 #include <linux/kdev_t.h>
24 #include <linux/major.h>
25 #include <linux/console.h>
26 #include <linux/delay.h>
27 #include <linux/seq_file.h>
28 #include <linux/initrd.h>
29 #include <linux/interrupt.h>
30 #include <linux/fsl_devices.h>
31 #include <linux/of_platform.h>
32
33 #include <asm/pgtable.h>
34 #include <asm/page.h>
35 #include <linux/atomic.h>
36 #include <asm/time.h>
37 #include <asm/io.h>
38 #include <asm/machdep.h>
39 #include <asm/ipic.h>
40 #include <asm/pci-bridge.h>
41 #include <asm/irq.h>
42 #include <mm/mmu_decl.h>
43 #include <asm/prom.h>
44 #include <asm/udbg.h>
45 #include <asm/mpic.h>
46
47 #include <sysdev/fsl_soc.h>
48 #include <sysdev/fsl_pci.h>
49
50 #include "mpc85xx.h"
51
52 static int sbc_rev;
53
sbc8548_pic_init(void)54 static void __init sbc8548_pic_init(void)
55 {
56 struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
57 0, 256, " OpenPIC ");
58 BUG_ON(mpic == NULL);
59 mpic_init(mpic);
60 }
61
62 /* Extract the HW Rev from the EPLD on the board */
sbc8548_hw_rev(void)63 static int __init sbc8548_hw_rev(void)
64 {
65 struct device_node *np;
66 struct resource res;
67 unsigned int *rev;
68 int board_rev = 0;
69
70 np = of_find_compatible_node(NULL, NULL, "hw-rev");
71 if (np == NULL) {
72 printk("No HW-REV found in DTB.\n");
73 return -ENODEV;
74 }
75
76 of_address_to_resource(np, 0, &res);
77 of_node_put(np);
78
79 rev = ioremap(res.start,sizeof(unsigned int));
80 board_rev = (*rev) >> 28;
81 iounmap(rev);
82
83 return board_rev;
84 }
85
86 /*
87 * Setup the architecture
88 */
sbc8548_setup_arch(void)89 static void __init sbc8548_setup_arch(void)
90 {
91 #ifdef CONFIG_PCI
92 struct device_node *np;
93 #endif
94
95 if (ppc_md.progress)
96 ppc_md.progress("sbc8548_setup_arch()", 0);
97
98 #ifdef CONFIG_PCI
99 for_each_node_by_type(np, "pci") {
100 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
101 of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
102 struct resource rsrc;
103 of_address_to_resource(np, 0, &rsrc);
104 if ((rsrc.start & 0xfffff) == 0x8000)
105 fsl_add_bridge(np, 1);
106 else
107 fsl_add_bridge(np, 0);
108 }
109 }
110 #endif
111 sbc_rev = sbc8548_hw_rev();
112 }
113
sbc8548_show_cpuinfo(struct seq_file * m)114 static void sbc8548_show_cpuinfo(struct seq_file *m)
115 {
116 uint pvid, svid, phid1;
117
118 pvid = mfspr(SPRN_PVR);
119 svid = mfspr(SPRN_SVR);
120
121 seq_printf(m, "Vendor\t\t: Wind River\n");
122 seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
123 seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
124 seq_printf(m, "SVR\t\t: 0x%x\n", svid);
125
126 /* Display cpu Pll setting */
127 phid1 = mfspr(SPRN_HID1);
128 seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
129 }
130
131 machine_device_initcall(sbc8548, mpc85xx_common_publish_devices);
132
133 /*
134 * Called very early, device-tree isn't unflattened
135 */
sbc8548_probe(void)136 static int __init sbc8548_probe(void)
137 {
138 unsigned long root = of_get_flat_dt_root();
139
140 return of_flat_dt_is_compatible(root, "SBC8548");
141 }
142
define_machine(sbc8548)143 define_machine(sbc8548) {
144 .name = "SBC8548",
145 .probe = sbc8548_probe,
146 .setup_arch = sbc8548_setup_arch,
147 .init_IRQ = sbc8548_pic_init,
148 .show_cpuinfo = sbc8548_show_cpuinfo,
149 .get_irq = mpic_get_irq,
150 .restart = fsl_rstcr_restart,
151 #ifdef CONFIG_PCI
152 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
153 #endif
154 .calibrate_decr = generic_calibrate_decr,
155 .progress = udbg_progress,
156 };
157