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1e76875e OJ |
1 | /* |
2 | * Copyright (C) 2006 PA Semi, Inc | |
3 | * | |
4 | * Authors: Kip Walker, PA Semi | |
5 | * Olof Johansson, PA Semi | |
6 | * | |
7 | * Maintained by: Olof Johansson <olof@lixom.net> | |
8 | * | |
9 | * Based on arch/powerpc/platforms/maple/setup.c | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
23 | */ | |
24 | ||
1e76875e OJ |
25 | #include <linux/errno.h> |
26 | #include <linux/kernel.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/console.h> | |
12d04eef | 29 | #include <linux/pci.h> |
1e76875e OJ |
30 | |
31 | #include <asm/prom.h> | |
32 | #include <asm/system.h> | |
33 | #include <asm/iommu.h> | |
34 | #include <asm/machdep.h> | |
35 | #include <asm/mpic.h> | |
36 | #include <asm/smp.h> | |
37 | #include <asm/time.h> | |
38 | ||
39 | #include "pasemi.h" | |
40 | ||
41 | static void pas_restart(char *cmd) | |
42 | { | |
43 | printk("restart unimplemented, looping...\n"); | |
44 | for (;;) ; | |
45 | } | |
46 | ||
47 | static void pas_power_off(void) | |
48 | { | |
49 | printk("power off unimplemented, looping...\n"); | |
50 | for (;;) ; | |
51 | } | |
52 | ||
53 | static void pas_halt(void) | |
54 | { | |
55 | pas_power_off(); | |
56 | } | |
57 | ||
58 | #ifdef CONFIG_SMP | |
59 | struct smp_ops_t pas_smp_ops = { | |
60 | .probe = smp_mpic_probe, | |
61 | .message_pass = smp_mpic_message_pass, | |
62 | .kick_cpu = smp_generic_kick_cpu, | |
63 | .setup_cpu = smp_mpic_setup_cpu, | |
64 | .give_timebase = smp_generic_give_timebase, | |
65 | .take_timebase = smp_generic_take_timebase, | |
66 | }; | |
67 | #endif /* CONFIG_SMP */ | |
68 | ||
69 | void __init pas_setup_arch(void) | |
70 | { | |
71 | #ifdef CONFIG_SMP | |
72 | /* Setup SMP callback */ | |
73 | smp_ops = &pas_smp_ops; | |
74 | #endif | |
12d04eef BH |
75 | /* no iommu yet */ |
76 | pci_dma_ops = &dma_direct_ops; | |
77 | ||
1e76875e OJ |
78 | /* Lookup PCI hosts */ |
79 | pas_pci_init(); | |
80 | ||
81 | #ifdef CONFIG_DUMMY_CONSOLE | |
82 | conswitchp = &dummy_con; | |
83 | #endif | |
84 | ||
85 | printk(KERN_DEBUG "Using default idle loop\n"); | |
86 | } | |
87 | ||
1e76875e OJ |
88 | /* No legacy IO on our parts */ |
89 | static int pas_check_legacy_ioport(unsigned int baseport) | |
90 | { | |
91 | return -ENODEV; | |
92 | } | |
93 | ||
94 | static __init void pas_init_IRQ(void) | |
95 | { | |
96 | struct device_node *np; | |
97 | struct device_node *root, *mpic_node; | |
98 | unsigned long openpic_addr; | |
99 | const unsigned int *opprop; | |
100 | int naddr, opplen; | |
101 | struct mpic *mpic; | |
102 | ||
103 | mpic_node = NULL; | |
104 | ||
105 | for_each_node_by_type(np, "interrupt-controller") | |
106 | if (device_is_compatible(np, "open-pic")) { | |
107 | mpic_node = np; | |
108 | break; | |
109 | } | |
110 | if (!mpic_node) | |
111 | for_each_node_by_type(np, "open-pic") { | |
112 | mpic_node = np; | |
113 | break; | |
114 | } | |
115 | if (!mpic_node) { | |
116 | printk(KERN_ERR | |
117 | "Failed to locate the MPIC interrupt controller\n"); | |
118 | return; | |
119 | } | |
120 | ||
121 | /* Find address list in /platform-open-pic */ | |
122 | root = of_find_node_by_path("/"); | |
123 | naddr = prom_n_addr_cells(root); | |
124 | opprop = get_property(root, "platform-open-pic", &opplen); | |
125 | if (!opprop) { | |
126 | printk(KERN_ERR "No platform-open-pic property.\n"); | |
127 | of_node_put(root); | |
128 | return; | |
129 | } | |
130 | openpic_addr = of_read_number(opprop, naddr); | |
131 | printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr); | |
1e76875e OJ |
132 | |
133 | mpic = mpic_alloc(mpic_node, openpic_addr, MPIC_PRIMARY, 0, 0, | |
134 | " PAS-OPIC "); | |
135 | BUG_ON(!mpic); | |
136 | ||
137 | mpic_assign_isu(mpic, 0, openpic_addr + 0x10000); | |
138 | mpic_init(mpic); | |
139 | of_node_put(mpic_node); | |
140 | of_node_put(root); | |
141 | } | |
142 | ||
143 | static void __init pas_progress(char *s, unsigned short hex) | |
144 | { | |
145 | printk("[%04x] : %s\n", hex, s ? s : ""); | |
146 | } | |
147 | ||
148 | ||
149 | /* | |
150 | * Called very early, MMU is off, device-tree isn't unflattened | |
151 | */ | |
152 | static int __init pas_probe(void) | |
153 | { | |
154 | unsigned long root = of_get_flat_dt_root(); | |
155 | ||
156 | if (!of_flat_dt_is_compatible(root, "PA6T-1682M")) | |
157 | return 0; | |
158 | ||
159 | hpte_init_native(); | |
160 | ||
161 | return 1; | |
162 | } | |
163 | ||
164 | define_machine(pas) { | |
165 | .name = "PA Semi PA6T-1682M", | |
166 | .probe = pas_probe, | |
167 | .setup_arch = pas_setup_arch, | |
1e76875e OJ |
168 | .init_IRQ = pas_init_IRQ, |
169 | .get_irq = mpic_get_irq, | |
1e76875e OJ |
170 | .restart = pas_restart, |
171 | .power_off = pas_power_off, | |
172 | .halt = pas_halt, | |
173 | .get_boot_time = pas_get_boot_time, | |
174 | .calibrate_decr = generic_calibrate_decr, | |
175 | .check_legacy_ioport = pas_check_legacy_ioport, | |
176 | .progress = pas_progress, | |
177 | }; |