1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Wind River SBC8548 setup and early boot code.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2007 Wind River Systems Inc.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * By Paul Gortmaker (see MAINTAINERS for contact information)
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * Based largely on the MPC8548CDS support - Copyright 2005 Freescale Inc.
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/stddef.h>
13*4882a593Smuzhiyun #include <linux/kernel.h>
14*4882a593Smuzhiyun #include <linux/init.h>
15*4882a593Smuzhiyun #include <linux/errno.h>
16*4882a593Smuzhiyun #include <linux/reboot.h>
17*4882a593Smuzhiyun #include <linux/pci.h>
18*4882a593Smuzhiyun #include <linux/kdev_t.h>
19*4882a593Smuzhiyun #include <linux/major.h>
20*4882a593Smuzhiyun #include <linux/console.h>
21*4882a593Smuzhiyun #include <linux/delay.h>
22*4882a593Smuzhiyun #include <linux/seq_file.h>
23*4882a593Smuzhiyun #include <linux/initrd.h>
24*4882a593Smuzhiyun #include <linux/interrupt.h>
25*4882a593Smuzhiyun #include <linux/fsl_devices.h>
26*4882a593Smuzhiyun #include <linux/of_platform.h>
27*4882a593Smuzhiyun #include <linux/pgtable.h>
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun #include <asm/page.h>
30*4882a593Smuzhiyun #include <linux/atomic.h>
31*4882a593Smuzhiyun #include <asm/time.h>
32*4882a593Smuzhiyun #include <asm/io.h>
33*4882a593Smuzhiyun #include <asm/machdep.h>
34*4882a593Smuzhiyun #include <asm/ipic.h>
35*4882a593Smuzhiyun #include <asm/pci-bridge.h>
36*4882a593Smuzhiyun #include <asm/irq.h>
37*4882a593Smuzhiyun #include <mm/mmu_decl.h>
38*4882a593Smuzhiyun #include <asm/prom.h>
39*4882a593Smuzhiyun #include <asm/udbg.h>
40*4882a593Smuzhiyun #include <asm/mpic.h>
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun #include <sysdev/fsl_soc.h>
43*4882a593Smuzhiyun #include <sysdev/fsl_pci.h>
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun #include "mpc85xx.h"
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun static int sbc_rev;
48*4882a593Smuzhiyun
sbc8548_pic_init(void)49*4882a593Smuzhiyun static void __init sbc8548_pic_init(void)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
52*4882a593Smuzhiyun 0, 256, " OpenPIC ");
53*4882a593Smuzhiyun BUG_ON(mpic == NULL);
54*4882a593Smuzhiyun mpic_init(mpic);
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun /* Extract the HW Rev from the EPLD on the board */
sbc8548_hw_rev(void)58*4882a593Smuzhiyun static int __init sbc8548_hw_rev(void)
59*4882a593Smuzhiyun {
60*4882a593Smuzhiyun struct device_node *np;
61*4882a593Smuzhiyun struct resource res;
62*4882a593Smuzhiyun unsigned int *rev;
63*4882a593Smuzhiyun int board_rev = 0;
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun np = of_find_compatible_node(NULL, NULL, "hw-rev");
66*4882a593Smuzhiyun if (np == NULL) {
67*4882a593Smuzhiyun printk("No HW-REV found in DTB.\n");
68*4882a593Smuzhiyun return -ENODEV;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun of_address_to_resource(np, 0, &res);
72*4882a593Smuzhiyun of_node_put(np);
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun rev = ioremap(res.start,sizeof(unsigned int));
75*4882a593Smuzhiyun board_rev = (*rev) >> 28;
76*4882a593Smuzhiyun iounmap(rev);
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun return board_rev;
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun /*
82*4882a593Smuzhiyun * Setup the architecture
83*4882a593Smuzhiyun */
sbc8548_setup_arch(void)84*4882a593Smuzhiyun static void __init sbc8548_setup_arch(void)
85*4882a593Smuzhiyun {
86*4882a593Smuzhiyun if (ppc_md.progress)
87*4882a593Smuzhiyun ppc_md.progress("sbc8548_setup_arch()", 0);
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun fsl_pci_assign_primary();
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun sbc_rev = sbc8548_hw_rev();
92*4882a593Smuzhiyun }
93*4882a593Smuzhiyun
sbc8548_show_cpuinfo(struct seq_file * m)94*4882a593Smuzhiyun static void sbc8548_show_cpuinfo(struct seq_file *m)
95*4882a593Smuzhiyun {
96*4882a593Smuzhiyun uint pvid, svid, phid1;
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun pvid = mfspr(SPRN_PVR);
99*4882a593Smuzhiyun svid = mfspr(SPRN_SVR);
100*4882a593Smuzhiyun
101*4882a593Smuzhiyun seq_printf(m, "Vendor\t\t: Wind River\n");
102*4882a593Smuzhiyun seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
103*4882a593Smuzhiyun seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
104*4882a593Smuzhiyun seq_printf(m, "SVR\t\t: 0x%x\n", svid);
105*4882a593Smuzhiyun
106*4882a593Smuzhiyun /* Display cpu Pll setting */
107*4882a593Smuzhiyun phid1 = mfspr(SPRN_HID1);
108*4882a593Smuzhiyun seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
109*4882a593Smuzhiyun }
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun machine_arch_initcall(sbc8548, mpc85xx_common_publish_devices);
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun /*
114*4882a593Smuzhiyun * Called very early, device-tree isn't unflattened
115*4882a593Smuzhiyun */
sbc8548_probe(void)116*4882a593Smuzhiyun static int __init sbc8548_probe(void)
117*4882a593Smuzhiyun {
118*4882a593Smuzhiyun return of_machine_is_compatible("SBC8548");
119*4882a593Smuzhiyun }
120*4882a593Smuzhiyun
define_machine(sbc8548)121*4882a593Smuzhiyun define_machine(sbc8548) {
122*4882a593Smuzhiyun .name = "SBC8548",
123*4882a593Smuzhiyun .probe = sbc8548_probe,
124*4882a593Smuzhiyun .setup_arch = sbc8548_setup_arch,
125*4882a593Smuzhiyun .init_IRQ = sbc8548_pic_init,
126*4882a593Smuzhiyun .show_cpuinfo = sbc8548_show_cpuinfo,
127*4882a593Smuzhiyun .get_irq = mpic_get_irq,
128*4882a593Smuzhiyun #ifdef CONFIG_PCI
129*4882a593Smuzhiyun .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
130*4882a593Smuzhiyun .pcibios_fixup_phb = fsl_pcibios_fixup_phb,
131*4882a593Smuzhiyun #endif
132*4882a593Smuzhiyun .calibrate_decr = generic_calibrate_decr,
133*4882a593Smuzhiyun .progress = udbg_progress,
134*4882a593Smuzhiyun };
135