Merge branches 'sh/serial-rework' and 'sh/oprofile'
[linux-2.6] / arch / powerpc / platforms / 86xx / mpc86xx_hpcn.c
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/system.h>
24 #include <asm/time.h>
25 #include <asm/machdep.h>
26 #include <asm/pci-bridge.h>
27 #include <asm/mpc86xx.h>
28 #include <asm/prom.h>
29 #include <mm/mmu_decl.h>
30 #include <asm/udbg.h>
31
32 #include <asm/mpic.h>
33
34 #include <sysdev/fsl_pci.h>
35 #include <sysdev/fsl_soc.h>
36
37 #include "mpc86xx.h"
38
39 #undef DEBUG
40
41 #ifdef DEBUG
42 #define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
43 #else
44 #define DBG(fmt...) do { } while(0)
45 #endif
46
47 #ifdef CONFIG_PCI
48 extern int uli_exclude_device(struct pci_controller *hose,
49                                 u_char bus, u_char devfn);
50
51 static int mpc86xx_exclude_device(struct pci_controller *hose,
52                                    u_char bus, u_char devfn)
53 {
54         struct device_node* node;       
55         struct resource rsrc;
56
57         node = hose->dn;
58         of_address_to_resource(node, 0, &rsrc);
59
60         if ((rsrc.start & 0xfffff) == 0x8000) {
61                 return uli_exclude_device(hose, bus, devfn);
62         }
63
64         return PCIBIOS_SUCCESSFUL;
65 }
66 #endif /* CONFIG_PCI */
67
68
69 static void __init
70 mpc86xx_hpcn_setup_arch(void)
71 {
72 #ifdef CONFIG_PCI
73         struct device_node *np;
74 #endif
75
76         if (ppc_md.progress)
77                 ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
78
79 #ifdef CONFIG_PCI
80         for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie") {
81                 struct resource rsrc;
82                 of_address_to_resource(np, 0, &rsrc);
83                 if ((rsrc.start & 0xfffff) == 0x8000)
84                         fsl_add_bridge(np, 1);
85                 else
86                         fsl_add_bridge(np, 0);
87         }
88
89         ppc_md.pci_exclude_device = mpc86xx_exclude_device;
90
91 #endif
92
93         printk("MPC86xx HPCN board from Freescale Semiconductor\n");
94
95 #ifdef CONFIG_SMP
96         mpc86xx_smp_init();
97 #endif
98 }
99
100
101 static void
102 mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
103 {
104         uint svid = mfspr(SPRN_SVR);
105
106         seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
107
108         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
109 }
110
111
112 /*
113  * Called very early, device-tree isn't unflattened
114  */
115 static int __init mpc86xx_hpcn_probe(void)
116 {
117         unsigned long root = of_get_flat_dt_root();
118
119         if (of_flat_dt_is_compatible(root, "fsl,mpc8641hpcn"))
120                 return 1;       /* Looks good */
121
122         /* Be nice and don't give silent boot death.  Delete this in 2.6.27 */
123         if (of_flat_dt_is_compatible(root, "mpc86xx")) {
124                 pr_warning("WARNING: your dts/dtb is old. You must update before the next kernel release\n");
125                 return 1;
126         }
127
128         return 0;
129 }
130
131 static long __init
132 mpc86xx_time_init(void)
133 {
134         unsigned int temp;
135
136         /* Set the time base to zero */
137         mtspr(SPRN_TBWL, 0);
138         mtspr(SPRN_TBWU, 0);
139
140         temp = mfspr(SPRN_HID0);
141         temp |= HID0_TBEN;
142         mtspr(SPRN_HID0, temp);
143         asm volatile("isync");
144
145         return 0;
146 }
147
148 static __initdata struct of_device_id of_bus_ids[] = {
149         { .compatible = "simple-bus", },
150         { .compatible = "fsl,rapidio-delta", },
151         {},
152 };
153
154 static int __init declare_of_platform_devices(void)
155 {
156         of_platform_bus_probe(NULL, of_bus_ids, NULL);
157
158         return 0;
159 }
160 machine_device_initcall(mpc86xx_hpcn, declare_of_platform_devices);
161
162 define_machine(mpc86xx_hpcn) {
163         .name                   = "MPC86xx HPCN",
164         .probe                  = mpc86xx_hpcn_probe,
165         .setup_arch             = mpc86xx_hpcn_setup_arch,
166         .init_IRQ               = mpc86xx_init_irq,
167         .show_cpuinfo           = mpc86xx_hpcn_show_cpuinfo,
168         .get_irq                = mpic_get_irq,
169         .restart                = fsl_rstcr_restart,
170         .time_init              = mpc86xx_time_init,
171         .calibrate_decr         = generic_calibrate_decr,
172         .progress               = udbg_progress,
173 #ifdef CONFIG_PCI
174         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
175 #endif
176 };