1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Wind River SBC8548 setup and early boot code.
4 *
5 * Copyright 2007 Wind River Systems Inc.
6 *
7 * By Paul Gortmaker (see MAINTAINERS for contact information)
8 *
9 * Based largely on the MPC8548CDS support - Copyright 2005 Freescale Inc.
10 */
11
12 #include <linux/stddef.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/errno.h>
16 #include <linux/reboot.h>
17 #include <linux/pci.h>
18 #include <linux/kdev_t.h>
19 #include <linux/major.h>
20 #include <linux/console.h>
21 #include <linux/delay.h>
22 #include <linux/seq_file.h>
23 #include <linux/initrd.h>
24 #include <linux/interrupt.h>
25 #include <linux/fsl_devices.h>
26 #include <linux/of_platform.h>
27
28 #include <asm/pgtable.h>
29 #include <asm/page.h>
30 #include <linux/atomic.h>
31 #include <asm/time.h>
32 #include <asm/io.h>
33 #include <asm/machdep.h>
34 #include <asm/ipic.h>
35 #include <asm/pci-bridge.h>
36 #include <asm/irq.h>
37 #include <mm/mmu_decl.h>
38 #include <asm/prom.h>
39 #include <asm/udbg.h>
40 #include <asm/mpic.h>
41
42 #include <sysdev/fsl_soc.h>
43 #include <sysdev/fsl_pci.h>
44
45 #include "mpc85xx.h"
46
47 static int sbc_rev;
48
sbc8548_pic_init(void)49 static void __init sbc8548_pic_init(void)
50 {
51 struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
52 0, 256, " OpenPIC ");
53 BUG_ON(mpic == NULL);
54 mpic_init(mpic);
55 }
56
57 /* Extract the HW Rev from the EPLD on the board */
sbc8548_hw_rev(void)58 static int __init sbc8548_hw_rev(void)
59 {
60 struct device_node *np;
61 struct resource res;
62 unsigned int *rev;
63 int board_rev = 0;
64
65 np = of_find_compatible_node(NULL, NULL, "hw-rev");
66 if (np == NULL) {
67 printk("No HW-REV found in DTB.\n");
68 return -ENODEV;
69 }
70
71 of_address_to_resource(np, 0, &res);
72 of_node_put(np);
73
74 rev = ioremap(res.start,sizeof(unsigned int));
75 board_rev = (*rev) >> 28;
76 iounmap(rev);
77
78 return board_rev;
79 }
80
81 /*
82 * Setup the architecture
83 */
sbc8548_setup_arch(void)84 static void __init sbc8548_setup_arch(void)
85 {
86 if (ppc_md.progress)
87 ppc_md.progress("sbc8548_setup_arch()", 0);
88
89 fsl_pci_assign_primary();
90
91 sbc_rev = sbc8548_hw_rev();
92 }
93
sbc8548_show_cpuinfo(struct seq_file * m)94 static void sbc8548_show_cpuinfo(struct seq_file *m)
95 {
96 uint pvid, svid, phid1;
97
98 pvid = mfspr(SPRN_PVR);
99 svid = mfspr(SPRN_SVR);
100
101 seq_printf(m, "Vendor\t\t: Wind River\n");
102 seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
103 seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
104 seq_printf(m, "SVR\t\t: 0x%x\n", svid);
105
106 /* Display cpu Pll setting */
107 phid1 = mfspr(SPRN_HID1);
108 seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
109 }
110
111 machine_arch_initcall(sbc8548, mpc85xx_common_publish_devices);
112
113 /*
114 * Called very early, device-tree isn't unflattened
115 */
sbc8548_probe(void)116 static int __init sbc8548_probe(void)
117 {
118 return of_machine_is_compatible("SBC8548");
119 }
120
define_machine(sbc8548)121 define_machine(sbc8548) {
122 .name = "SBC8548",
123 .probe = sbc8548_probe,
124 .setup_arch = sbc8548_setup_arch,
125 .init_IRQ = sbc8548_pic_init,
126 .show_cpuinfo = sbc8548_show_cpuinfo,
127 .get_irq = mpic_get_irq,
128 #ifdef CONFIG_PCI
129 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
130 .pcibios_fixup_phb = fsl_pcibios_fixup_phb,
131 #endif
132 .calibrate_decr = generic_calibrate_decr,
133 .progress = udbg_progress,
134 };
135
