projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[PATCH] powerpc: serial port discovery (#2)
[deliverable/linux.git] / arch / powerpc / platforms / maple / setup.c
CommitLineData
1da177e4 1/*
0cb7b2af 2 * Maple (970 eval board) setup code
1da177e4
LT		 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>
3d1229d6 54#include <asm/kexec.h>
1da177e4
LT		 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>
bbeb3f4c 63#include <asm/mpic.h>
40ef8cbc 64#include <asm/udbg.h>
1da177e4 65
0cb7b2af
PM		 66#include "maple.h"
67
1da177e4
LT		 68#ifdef DEBUG
69#define DBG(fmt...) udbg_printf(fmt)
70#else
71#define DBG(fmt...)
72#endif
73
1da177e4
LT		 74extern void generic_find_legacy_serial_ports(u64 *physport,
75 unsigned int *default_speed);
76
1da177e4
LT		 77static void maple_restart(char *cmd)
78{
d7152fe1
DG		 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 (;;) ;
1da177e4
LT		 109}
110
111static void maple_power_off(void)
112{
d7152fe1
DG		 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 (;;) ;
1da177e4
LT		 143}
144
145static void maple_halt(void)
146{
d7152fe1 147 maple_power_off();
1da177e4
LT		 148}
149
150#ifdef CONFIG_SMP
151struct 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
161void __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
62d60e9f
ME		 176
177 printk(KERN_INFO "Using native/NAP idle loop\n");
1da177e4
LT		 178}
179
180/*
181 * Early initialization.
182 */
183static 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
1da177e4
LT		 195 /* Setup interrupt mapping options */
196 ppc64_interrupt_controller = IC_OPEN_PIC;
197
198 iommu_init_early_u3();
199
200 DBG(" <- maple_init_early\n");
201}
202
203
204static __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
241static 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 */
250static 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_u3_dart_table();
261
262 return 1;
263}
264
265struct 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,
10f7e7c1 279 .calibrate_decr = generic_calibrate_decr,
1da177e4 280 .progress = maple_progress,
62d60e9f 281 .idle_loop = native_idle,
3d1229d6
ME		 282#ifdef CONFIG_KEXEC
283 .machine_kexec = default_machine_kexec,
284 .machine_kexec_prepare = default_machine_kexec_prepare,
285#endif
1da177e4 286};
Linux kernel - Deliverables
This page took 0.094746 seconds and 5 git commands to generate.