1 /*
2 * MPC86xx HPCN board specific routines
3 *
4 * Recode: ZHANG WEI <wei.zhang@freescale.com>
5 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
6 *
7 * Copyright 2006 Freescale Semiconductor Inc.
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 */
14
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/pci.h>
18 #include <linux/kdev_t.h>
19 #include <linux/delay.h>
20 #include <linux/seq_file.h>
21 #include <linux/of_platform.h>
22
23 #include <asm/time.h>
24 #include <asm/machdep.h>
25 #include <asm/pci-bridge.h>
26 #include <asm/prom.h>
27 #include <mm/mmu_decl.h>
28 #include <asm/udbg.h>
29 #include <asm/swiotlb.h>
30
31 #include <asm/mpic.h>
32
33 #include <sysdev/fsl_pci.h>
34 #include <sysdev/fsl_soc.h>
35
36 #include "mpc86xx.h"
37
38 #undef DEBUG
39
40 #ifdef DEBUG
41 #define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
42 #else
43 #define DBG(fmt...) do { } while(0)
44 #endif
45
46 #ifdef CONFIG_PCI
47 extern int uli_exclude_device(struct pci_controller *hose,
48 u_char bus, u_char devfn);
49
50 static int mpc86xx_exclude_device(struct pci_controller *hose,
51 u_char bus, u_char devfn)
52 {
53 if (hose->dn == fsl_pci_primary)
54 return uli_exclude_device(hose, bus, devfn);
55
56 return PCIBIOS_SUCCESSFUL;
57 }
58 #endif /* CONFIG_PCI */
59
60
61 static void __init
62 mpc86xx_hpcn_setup_arch(void)
63 {
64 if (ppc_md.progress)
65 ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
66
67 #ifdef CONFIG_PCI
68 ppc_md.pci_exclude_device = mpc86xx_exclude_device;
69 #endif
70
71 printk("MPC86xx HPCN board from Freescale Semiconductor\n");
72
73 #ifdef CONFIG_SMP
74 mpc86xx_smp_init();
75 #endif
76
77 fsl_pci_assign_primary();
78
79 swiotlb_detect_4g();
80 }
81
82
83 static void
84 mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
85 {
86 uint svid = mfspr(SPRN_SVR);
87
88 seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
89
90 seq_printf(m, "SVR\t\t: 0x%x\n", svid);
91 }
92
93
94 /*
95 * Called very early, device-tree isn't unflattened
96 */
97 static int __init mpc86xx_hpcn_probe(void)
98 {
99 unsigned long root = of_get_flat_dt_root();
100
101 if (of_flat_dt_is_compatible(root, "fsl,mpc8641hpcn"))
102 return 1; /* Looks good */
103
104 /* Be nice and don't give silent boot death. Delete this in 2.6.27 */
105 if (of_flat_dt_is_compatible(root, "mpc86xx")) {
106 pr_warning("WARNING: your dts/dtb is old. You must update before the next kernel release\n");
107 return 1;
108 }
109
110 return 0;
111 }
112
113 static long __init
114 mpc86xx_time_init(void)
115 {
116 unsigned int temp;
117
118 /* Set the time base to zero */
119 mtspr(SPRN_TBWL, 0);
120 mtspr(SPRN_TBWU, 0);
121
122 temp = mfspr(SPRN_HID0);
123 temp |= HID0_TBEN;
124 mtspr(SPRN_HID0, temp);
125 asm volatile("isync");
126
127 return 0;
128 }
129
130 static __initdata struct of_device_id of_bus_ids[] = {
131 { .compatible = "simple-bus", },
132 { .compatible = "fsl,srio", },
133 { .compatible = "gianfar", },
134 { .compatible = "fsl,mpc8641-pcie", },
135 {},
136 };
137
138 static int __init declare_of_platform_devices(void)
139 {
140 of_platform_bus_probe(NULL, of_bus_ids, NULL);
141
142 return 0;
143 }
144 machine_arch_initcall(mpc86xx_hpcn, declare_of_platform_devices);
145 machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier);
146
147 define_machine(mpc86xx_hpcn) {
148 .name = "MPC86xx HPCN",
149 .probe = mpc86xx_hpcn_probe,
150 .setup_arch = mpc86xx_hpcn_setup_arch,
151 .init_IRQ = mpc86xx_init_irq,
152 .show_cpuinfo = mpc86xx_hpcn_show_cpuinfo,
153 .get_irq = mpic_get_irq,
154 .restart = fsl_rstcr_restart,
155 .time_init = mpc86xx_time_init,
156 .calibrate_decr = generic_calibrate_decr,
157 .progress = udbg_progress,
158 #ifdef CONFIG_PCI
159 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
160 #endif
161 };
162
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