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/module.h>
30 #include <linux/interrupt.h>
31 #include <linux/fsl_devices.h>
32 #include <linux/of_platform.h>
33
34 #include <asm/system.h>
35 #include <asm/pgtable.h>
36 #include <asm/page.h>
37 #include <asm/atomic.h>
38 #include <asm/time.h>
39 #include <asm/io.h>
40 #include <asm/machdep.h>
41 #include <asm/ipic.h>
42 #include <asm/pci-bridge.h>
43 #include <asm/irq.h>
44 #include <mm/mmu_decl.h>
45 #include <asm/prom.h>
46 #include <asm/udbg.h>
47 #include <asm/mpic.h>
48
49 #include <sysdev/fsl_soc.h>
50 #include <sysdev/fsl_pci.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;
57 struct resource r;
58 struct device_node *np = NULL;
59
60 np = of_find_node_by_type(np, "open-pic");
61
62 if (np == NULL) {
63 printk(KERN_ERR "Could not find open-pic node\n");
64 return;
65 }
66
67 if (of_address_to_resource(np, 0, &r)) {
68 printk(KERN_ERR "Failed to map mpic register space\n");
69 of_node_put(np);
70 return;
71 }
72
73 mpic = mpic_alloc(np, r.start,
74 MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
75 0, 256, " OpenPIC ");
76 BUG_ON(mpic == NULL);
77
78 /* Return the mpic node */
79 of_node_put(np);
80
81 mpic_init(mpic);
82 }
83
84 /* Extract the HW Rev from the EPLD on the board */
sbc8548_hw_rev(void)85 static int __init sbc8548_hw_rev(void)
86 {
87 struct device_node *np;
88 struct resource res;
89 unsigned int *rev;
90 int board_rev = 0;
91
92 np = of_find_compatible_node(NULL, NULL, "hw-rev");
93 if (np == NULL) {
94 printk("No HW-REV found in DTB.\n");
95 return -ENODEV;
96 }
97
98 of_address_to_resource(np, 0, &res);
99 of_node_put(np);
100
101 rev = ioremap(res.start,sizeof(unsigned int));
102 board_rev = (*rev) >> 28;
103 iounmap(rev);
104
105 return board_rev;
106 }
107
108 /*
109 * Setup the architecture
110 */
sbc8548_setup_arch(void)111 static void __init sbc8548_setup_arch(void)
112 {
113 #ifdef CONFIG_PCI
114 struct device_node *np;
115 #endif
116
117 if (ppc_md.progress)
118 ppc_md.progress("sbc8548_setup_arch()", 0);
119
120 #ifdef CONFIG_PCI
121 for_each_node_by_type(np, "pci") {
122 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
123 of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
124 struct resource rsrc;
125 of_address_to_resource(np, 0, &rsrc);
126 if ((rsrc.start & 0xfffff) == 0x8000)
127 fsl_add_bridge(np, 1);
128 else
129 fsl_add_bridge(np, 0);
130 }
131 }
132 #endif
133 sbc_rev = sbc8548_hw_rev();
134 }
135
sbc8548_show_cpuinfo(struct seq_file * m)136 static void sbc8548_show_cpuinfo(struct seq_file *m)
137 {
138 uint pvid, svid, phid1;
139
140 pvid = mfspr(SPRN_PVR);
141 svid = mfspr(SPRN_SVR);
142
143 seq_printf(m, "Vendor\t\t: Wind River\n");
144 seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
145 seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
146 seq_printf(m, "SVR\t\t: 0x%x\n", svid);
147
148 /* Display cpu Pll setting */
149 phid1 = mfspr(SPRN_HID1);
150 seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
151 }
152
153 static struct of_device_id __initdata of_bus_ids[] = {
154 { .name = "soc", },
155 { .type = "soc", },
156 { .compatible = "simple-bus", },
157 {},
158 };
159
declare_of_platform_devices(void)160 static int __init declare_of_platform_devices(void)
161 {
162 of_platform_bus_probe(NULL, of_bus_ids, NULL);
163
164 return 0;
165 }
166 machine_device_initcall(sbc8548, declare_of_platform_devices);
167
168 /*
169 * Called very early, device-tree isn't unflattened
170 */
sbc8548_probe(void)171 static int __init sbc8548_probe(void)
172 {
173 unsigned long root = of_get_flat_dt_root();
174
175 return of_flat_dt_is_compatible(root, "SBC8548");
176 }
177
define_machine(sbc8548)178 define_machine(sbc8548) {
179 .name = "SBC8548",
180 .probe = sbc8548_probe,
181 .setup_arch = sbc8548_setup_arch,
182 .init_IRQ = sbc8548_pic_init,
183 .show_cpuinfo = sbc8548_show_cpuinfo,
184 .get_irq = mpic_get_irq,
185 .restart = fsl_rstcr_restart,
186 #ifdef CONFIG_PCI
187 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
188 #endif
189 .calibrate_decr = generic_calibrate_decr,
190 .progress = udbg_progress,
191 };
192