Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart
[linux-2.6] / arch / powerpc / platforms / pasemi / setup.c
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
25 #include <linux/errno.h>
26 #include <linux/kernel.h>
27 #include <linux/delay.h>
28 #include <linux/console.h>
29 #include <linux/pci.h>
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
75         /* no iommu yet */
76         pci_dma_ops = &dma_direct_ops;
77
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
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);
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,
168         .init_IRQ               = pas_init_IRQ,
169         .get_irq                = mpic_get_irq,
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 };