1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * MPC86xx HPCN board specific routines
4 *
5 * Recode: ZHANG WEI <wei.zhang@freescale.com>
6 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
7 *
8 * Copyright 2006 Freescale Semiconductor Inc.
9 */
10
11 #include <linux/stddef.h>
12 #include <linux/kernel.h>
13 #include <linux/pci.h>
14 #include <linux/kdev_t.h>
15 #include <linux/delay.h>
16 #include <linux/seq_file.h>
17 #include <linux/of_platform.h>
18
19 #include <asm/time.h>
20 #include <asm/machdep.h>
21 #include <asm/pci-bridge.h>
22 #include <asm/prom.h>
23 #include <mm/mmu_decl.h>
24 #include <asm/udbg.h>
25 #include <asm/swiotlb.h>
26
27 #include <asm/mpic.h>
28
29 #include <sysdev/fsl_pci.h>
30 #include <sysdev/fsl_soc.h>
31
32 #include "mpc86xx.h"
33
34 #undef DEBUG
35
36 #ifdef DEBUG
37 #define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
38 #else
39 #define DBG(fmt...) do { } while(0)
40 #endif
41
42 #ifdef CONFIG_PCI
43 extern int uli_exclude_device(struct pci_controller *hose,
44 u_char bus, u_char devfn);
45
mpc86xx_exclude_device(struct pci_controller * hose,u_char bus,u_char devfn)46 static int mpc86xx_exclude_device(struct pci_controller *hose,
47 u_char bus, u_char devfn)
48 {
49 if (hose->dn == fsl_pci_primary)
50 return uli_exclude_device(hose, bus, devfn);
51
52 return PCIBIOS_SUCCESSFUL;
53 }
54 #endif /* CONFIG_PCI */
55
56
57 static void __init
mpc86xx_hpcn_setup_arch(void)58 mpc86xx_hpcn_setup_arch(void)
59 {
60 if (ppc_md.progress)
61 ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
62
63 #ifdef CONFIG_PCI
64 ppc_md.pci_exclude_device = mpc86xx_exclude_device;
65 #endif
66
67 printk("MPC86xx HPCN board from Freescale Semiconductor\n");
68
69 #ifdef CONFIG_SMP
70 mpc86xx_smp_init();
71 #endif
72
73 fsl_pci_assign_primary();
74
75 swiotlb_detect_4g();
76 }
77
78
79 static void
mpc86xx_hpcn_show_cpuinfo(struct seq_file * m)80 mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
81 {
82 uint svid = mfspr(SPRN_SVR);
83
84 seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
85
86 seq_printf(m, "SVR\t\t: 0x%x\n", svid);
87 }
88
89
90 /*
91 * Called very early, device-tree isn't unflattened
92 */
mpc86xx_hpcn_probe(void)93 static int __init mpc86xx_hpcn_probe(void)
94 {
95 if (of_machine_is_compatible("fsl,mpc8641hpcn"))
96 return 1; /* Looks good */
97
98 /* Be nice and don't give silent boot death. Delete this in 2.6.27 */
99 if (of_machine_is_compatible("mpc86xx")) {
100 pr_warn("WARNING: your dts/dtb is old. You must update before the next kernel release.\n");
101 return 1;
102 }
103
104 return 0;
105 }
106
107 static const struct of_device_id of_bus_ids[] __initconst = {
108 { .compatible = "fsl,srio", },
109 {},
110 };
111
declare_of_platform_devices(void)112 static int __init declare_of_platform_devices(void)
113 {
114 mpc86xx_common_publish_devices();
115 of_platform_bus_probe(NULL, of_bus_ids, NULL);
116
117 return 0;
118 }
119 machine_arch_initcall(mpc86xx_hpcn, declare_of_platform_devices);
120
define_machine(mpc86xx_hpcn)121 define_machine(mpc86xx_hpcn) {
122 .name = "MPC86xx HPCN",
123 .probe = mpc86xx_hpcn_probe,
124 .setup_arch = mpc86xx_hpcn_setup_arch,
125 .init_IRQ = mpc86xx_init_irq,
126 .show_cpuinfo = mpc86xx_hpcn_show_cpuinfo,
127 .get_irq = mpic_get_irq,
128 .time_init = mpc86xx_time_init,
129 .calibrate_decr = generic_calibrate_decr,
130 .progress = udbg_progress,
131 #ifdef CONFIG_PCI
132 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
133 #endif
134 };
135