Linux 2.6.31-rc6
[linux-2.6] / arch / powerpc / platforms / 85xx / mpc8536_ds.c
1 /*
2  * MPC8536 DS Board Setup
3  *
4  * Copyright 2008 Freescale Semiconductor, Inc.
5  *
6  * This program is free software; you can redistribute  it and/or modify it
7  * under  the terms of  the GNU General  Public License as published by the
8  * Free Software Foundation;  either version 2 of the  License, or (at your
9  * option) any later version.
10  */
11
12 #include <linux/stddef.h>
13 #include <linux/kernel.h>
14 #include <linux/pci.h>
15 #include <linux/kdev_t.h>
16 #include <linux/delay.h>
17 #include <linux/seq_file.h>
18 #include <linux/interrupt.h>
19 #include <linux/of_platform.h>
20 #include <linux/lmb.h>
21
22 #include <asm/system.h>
23 #include <asm/time.h>
24 #include <asm/machdep.h>
25 #include <asm/pci-bridge.h>
26 #include <mm/mmu_decl.h>
27 #include <asm/prom.h>
28 #include <asm/udbg.h>
29 #include <asm/mpic.h>
30 #include <asm/swiotlb.h>
31
32 #include <sysdev/fsl_soc.h>
33 #include <sysdev/fsl_pci.h>
34
35 void __init mpc8536_ds_pic_init(void)
36 {
37         struct mpic *mpic;
38         struct resource r;
39         struct device_node *np;
40
41         np = of_find_node_by_type(NULL, "open-pic");
42         if (np == NULL) {
43                 printk(KERN_ERR "Could not find open-pic node\n");
44                 return;
45         }
46
47         if (of_address_to_resource(np, 0, &r)) {
48                 printk(KERN_ERR "Failed to map mpic register space\n");
49                 of_node_put(np);
50                 return;
51         }
52
53         mpic = mpic_alloc(np, r.start,
54                           MPIC_PRIMARY | MPIC_WANTS_RESET |
55                           MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
56                         0, 256, " OpenPIC  ");
57         BUG_ON(mpic == NULL);
58         of_node_put(np);
59
60         mpic_init(mpic);
61 }
62
63 /*
64  * Setup the architecture
65  */
66 static void __init mpc8536_ds_setup_arch(void)
67 {
68 #ifdef CONFIG_PCI
69         struct device_node *np;
70         struct pci_controller *hose;
71 #endif
72         dma_addr_t max = 0xffffffff;
73
74         if (ppc_md.progress)
75                 ppc_md.progress("mpc8536_ds_setup_arch()", 0);
76
77 #ifdef CONFIG_PCI
78         for_each_node_by_type(np, "pci") {
79                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
80                     of_device_is_compatible(np, "fsl,mpc8548-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                         hose = pci_find_hose_for_OF_device(np);
89                         max = min(max, hose->dma_window_base_cur +
90                                         hose->dma_window_size);
91                 }
92         }
93
94 #endif
95
96 #ifdef CONFIG_SWIOTLB
97         if (lmb_end_of_DRAM() > max) {
98                 ppc_swiotlb_enable = 1;
99                 set_pci_dma_ops(&swiotlb_pci_dma_ops);
100         }
101 #endif
102
103         printk("MPC8536 DS board from Freescale Semiconductor\n");
104 }
105
106 static struct of_device_id __initdata mpc8536_ds_ids[] = {
107         { .type = "soc", },
108         { .compatible = "soc", },
109         { .compatible = "simple-bus", },
110         { .compatible = "gianfar", },
111         {},
112 };
113
114 static int __init mpc8536_ds_publish_devices(void)
115 {
116         return of_platform_bus_probe(NULL, mpc8536_ds_ids, NULL);
117 }
118 machine_device_initcall(mpc8536_ds, mpc8536_ds_publish_devices);
119
120 machine_arch_initcall(mpc8536_ds, swiotlb_setup_bus_notifier);
121
122 /*
123  * Called very early, device-tree isn't unflattened
124  */
125 static int __init mpc8536_ds_probe(void)
126 {
127         unsigned long root = of_get_flat_dt_root();
128
129         return of_flat_dt_is_compatible(root, "fsl,mpc8536ds");
130 }
131
132 define_machine(mpc8536_ds) {
133         .name                   = "MPC8536 DS",
134         .probe                  = mpc8536_ds_probe,
135         .setup_arch             = mpc8536_ds_setup_arch,
136         .init_IRQ               = mpc8536_ds_pic_init,
137 #ifdef CONFIG_PCI
138         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
139 #endif
140         .get_irq                = mpic_get_irq,
141         .restart                = fsl_rstcr_restart,
142         .calibrate_decr         = generic_calibrate_decr,
143         .progress               = udbg_progress,
144 };