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/memblock.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
mpc8536_ds_pic_init(void)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 */
mpc8536_ds_setup_arch(void)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 (memblock_end_of_DRAM() > max) {
98 ppc_swiotlb_enable = 1;
99 set_pci_dma_ops(&swiotlb_dma_ops);
100 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
101 }
102 #endif
103
104 printk("MPC8536 DS board from Freescale Semiconductor\n");
105 }
106
107 static struct of_device_id __initdata mpc8536_ds_ids[] = {
108 { .type = "soc", },
109 { .compatible = "soc", },
110 { .compatible = "simple-bus", },
111 { .compatible = "gianfar", },
112 {},
113 };
114
mpc8536_ds_publish_devices(void)115 static int __init mpc8536_ds_publish_devices(void)
116 {
117 return of_platform_bus_probe(NULL, mpc8536_ds_ids, NULL);
118 }
119 machine_device_initcall(mpc8536_ds, mpc8536_ds_publish_devices);
120
121 machine_arch_initcall(mpc8536_ds, swiotlb_setup_bus_notifier);
122
123 /*
124 * Called very early, device-tree isn't unflattened
125 */
mpc8536_ds_probe(void)126 static int __init mpc8536_ds_probe(void)
127 {
128 unsigned long root = of_get_flat_dt_root();
129
130 return of_flat_dt_is_compatible(root, "fsl,mpc8536ds");
131 }
132
define_machine(mpc8536_ds)133 define_machine(mpc8536_ds) {
134 .name = "MPC8536 DS",
135 .probe = mpc8536_ds_probe,
136 .setup_arch = mpc8536_ds_setup_arch,
137 .init_IRQ = mpc8536_ds_pic_init,
138 #ifdef CONFIG_PCI
139 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
140 #endif
141 .get_irq = mpic_get_irq,
142 .restart = fsl_rstcr_restart,
143 .calibrate_decr = generic_calibrate_decr,
144 .progress = udbg_progress,
145 };
146