Merge master.kernel.org:/home/rmk/linux-2.6-mmc
[linux-2.6] / arch / powerpc / platforms / maple / setup.c
1 /*
2  *  Maple (970 eval board) setup code
3  *
4  *  (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org),
5  *                     IBM Corp. 
6  *
7  *  This program is free software; you can redistribute it and/or
8  *  modify it under the terms of the GNU General Public License
9  *  as published by the Free Software Foundation; either version
10  *  2 of the License, or (at your option) any later version.
11  *
12  */
13
14 #define DEBUG
15
16 #include <linux/config.h>
17 #include <linux/init.h>
18 #include <linux/errno.h>
19 #include <linux/sched.h>
20 #include <linux/kernel.h>
21 #include <linux/mm.h>
22 #include <linux/stddef.h>
23 #include <linux/unistd.h>
24 #include <linux/ptrace.h>
25 #include <linux/slab.h>
26 #include <linux/user.h>
27 #include <linux/a.out.h>
28 #include <linux/tty.h>
29 #include <linux/string.h>
30 #include <linux/delay.h>
31 #include <linux/ioport.h>
32 #include <linux/major.h>
33 #include <linux/initrd.h>
34 #include <linux/vt_kern.h>
35 #include <linux/console.h>
36 #include <linux/ide.h>
37 #include <linux/pci.h>
38 #include <linux/adb.h>
39 #include <linux/cuda.h>
40 #include <linux/pmu.h>
41 #include <linux/irq.h>
42 #include <linux/seq_file.h>
43 #include <linux/root_dev.h>
44 #include <linux/serial.h>
45 #include <linux/smp.h>
46
47 #include <asm/processor.h>
48 #include <asm/sections.h>
49 #include <asm/prom.h>
50 #include <asm/system.h>
51 #include <asm/pgtable.h>
52 #include <asm/bitops.h>
53 #include <asm/io.h>
54 #include <asm/kexec.h>
55 #include <asm/pci-bridge.h>
56 #include <asm/iommu.h>
57 #include <asm/machdep.h>
58 #include <asm/dma.h>
59 #include <asm/cputable.h>
60 #include <asm/time.h>
61 #include <asm/of_device.h>
62 #include <asm/lmb.h>
63 #include <asm/mpic.h>
64 #include <asm/udbg.h>
65
66 #include "maple.h"
67
68 #ifdef DEBUG
69 #define DBG(fmt...) udbg_printf(fmt)
70 #else
71 #define DBG(fmt...)
72 #endif
73
74 extern void generic_find_legacy_serial_ports(u64 *physport,
75                 unsigned int *default_speed);
76
77 static void maple_restart(char *cmd)
78 {
79         unsigned int maple_nvram_base;
80         unsigned int maple_nvram_offset;
81         unsigned int maple_nvram_command;
82         struct device_node *rtcs;
83
84         /* find NVRAM device */
85         rtcs = find_compatible_devices("nvram", "AMD8111");
86         if (rtcs && rtcs->addrs) {
87                 maple_nvram_base = rtcs->addrs[0].address;
88         } else {
89                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
90                 printk(KERN_EMERG "Maple: Manual Restart Required\n");
91                 return;
92         }
93
94         /* find service processor device */
95         rtcs = find_devices("service-processor");
96         if (!rtcs) {
97                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
98                 printk(KERN_EMERG "Maple: Manual Restart Required\n");
99                 return;
100         }
101         maple_nvram_offset = *(unsigned int*) get_property(rtcs,
102                         "restart-addr", NULL);
103         maple_nvram_command = *(unsigned int*) get_property(rtcs,
104                         "restart-value", NULL);
105
106         /* send command */
107         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
108         for (;;) ;
109 }
110
111 static void maple_power_off(void)
112 {
113         unsigned int maple_nvram_base;
114         unsigned int maple_nvram_offset;
115         unsigned int maple_nvram_command;
116         struct device_node *rtcs;
117
118         /* find NVRAM device */
119         rtcs = find_compatible_devices("nvram", "AMD8111");
120         if (rtcs && rtcs->addrs) {
121                 maple_nvram_base = rtcs->addrs[0].address;
122         } else {
123                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
124                 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
125                 return;
126         }
127
128         /* find service processor device */
129         rtcs = find_devices("service-processor");
130         if (!rtcs) {
131                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
132                 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
133                 return;
134         }
135         maple_nvram_offset = *(unsigned int*) get_property(rtcs,
136                         "power-off-addr", NULL);
137         maple_nvram_command = *(unsigned int*) get_property(rtcs,
138                         "power-off-value", NULL);
139
140         /* send command */
141         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
142         for (;;) ;
143 }
144
145 static void maple_halt(void)
146 {
147         maple_power_off();
148 }
149
150 #ifdef CONFIG_SMP
151 struct smp_ops_t maple_smp_ops = {
152         .probe          = smp_mpic_probe,
153         .message_pass   = smp_mpic_message_pass,
154         .kick_cpu       = smp_generic_kick_cpu,
155         .setup_cpu      = smp_mpic_setup_cpu,
156         .give_timebase  = smp_generic_give_timebase,
157         .take_timebase  = smp_generic_take_timebase,
158 };
159 #endif /* CONFIG_SMP */
160
161 void __init maple_setup_arch(void)
162 {
163         /* init to some ~sane value until calibrate_delay() runs */
164         loops_per_jiffy = 50000000;
165
166         /* Setup SMP callback */
167 #ifdef CONFIG_SMP
168         smp_ops = &maple_smp_ops;
169 #endif
170         /* Lookup PCI hosts */
171         maple_pci_init();
172
173 #ifdef CONFIG_DUMMY_CONSOLE
174         conswitchp = &dummy_con;
175 #endif
176
177         printk(KERN_INFO "Using native/NAP idle loop\n");
178 }
179
180 /* 
181  * Early initialization.
182  */
183 static void __init maple_init_early(void)
184 {
185         unsigned int default_speed;
186         u64 physport;
187
188         DBG(" -> maple_init_early\n");
189
190         /* Initialize hash table, from now on, we can take hash faults
191          * and call ioremap
192          */
193         hpte_init_native();
194
195         /* Setup interrupt mapping options */
196         ppc64_interrupt_controller = IC_OPEN_PIC;
197
198         iommu_init_early_dart();
199
200         DBG(" <- maple_init_early\n");
201 }
202
203
204 static __init void maple_init_IRQ(void)
205 {
206         struct device_node *root;
207         unsigned int *opprop;
208         unsigned long opic_addr;
209         struct mpic *mpic;
210         unsigned char senses[128];
211         int n;
212
213         DBG(" -> maple_init_IRQ\n");
214
215         /* XXX: Non standard, replace that with a proper openpic/mpic node
216          * in the device-tree. Find the Open PIC if present */
217         root = of_find_node_by_path("/");
218         opprop = (unsigned int *) get_property(root,
219                                 "platform-open-pic", NULL);
220         if (opprop == 0)
221                 panic("OpenPIC not found !\n");
222
223         n = prom_n_addr_cells(root);
224         for (opic_addr = 0; n > 0; --n)
225                 opic_addr = (opic_addr << 32) + *opprop++;
226         of_node_put(root);
227
228         /* Obtain sense values from device-tree */
229         prom_get_irq_senses(senses, 0, 128);
230
231         mpic = mpic_alloc(opic_addr,
232                           MPIC_PRIMARY | MPIC_BIG_ENDIAN |
233                           MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
234                           0, 0, 128, 128, senses, 128, "U3-MPIC");
235         BUG_ON(mpic == NULL);
236         mpic_init(mpic);
237
238         DBG(" <- maple_init_IRQ\n");
239 }
240
241 static void __init maple_progress(char *s, unsigned short hex)
242 {
243         printk("*** %04x : %s\n", hex, s ? s : "");
244 }
245
246
247 /*
248  * Called very early, MMU is off, device-tree isn't unflattened
249  */
250 static int __init maple_probe(int platform)
251 {
252         if (platform != PLATFORM_MAPLE)
253                 return 0;
254         /*
255          * On U3, the DART (iommu) must be allocated now since it
256          * has an impact on htab_initialize (due to the large page it
257          * occupies having to be broken up so the DART itself is not
258          * part of the cacheable linar mapping
259          */
260         alloc_dart_table();
261
262         return 1;
263 }
264
265 struct machdep_calls __initdata maple_md = {
266         .probe                  = maple_probe,
267         .setup_arch             = maple_setup_arch,
268         .init_early             = maple_init_early,
269         .init_IRQ               = maple_init_IRQ,
270         .get_irq                = mpic_get_irq,
271         .pcibios_fixup          = maple_pcibios_fixup,
272         .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
273         .restart                = maple_restart,
274         .power_off              = maple_power_off,
275         .halt                   = maple_halt,
276         .get_boot_time          = maple_get_boot_time,
277         .set_rtc_time           = maple_set_rtc_time,
278         .get_rtc_time           = maple_get_rtc_time,
279         .calibrate_decr         = generic_calibrate_decr,
280         .progress               = maple_progress,
281         .idle_loop              = native_idle,
282 #ifdef CONFIG_KEXEC
283         .machine_kexec          = default_machine_kexec,
284         .machine_kexec_prepare  = default_machine_kexec_prepare,
285         .machine_crash_shutdown = default_machine_crash_shutdown,
286 #endif
287 };