powerpc: rename powermac files to remove pmac_ prefix
[linux-3.10.git] / arch / powerpc / platforms / powermac / setup.c
1 /*
2  *  arch/ppc/platforms/setup.c
3  *
4  *  PowerPC version
5  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
6  *
7  *  Adapted for Power Macintosh by Paul Mackerras
8  *    Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
9  *
10  *  Derived from "arch/alpha/kernel/setup.c"
11  *    Copyright (C) 1995 Linus Torvalds
12  *
13  *  Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
14  *
15  *  This program is free software; you can redistribute it and/or
16  *  modify it under the terms of the GNU General Public License
17  *  as published by the Free Software Foundation; either version
18  *  2 of the License, or (at your option) any later version.
19  *
20  */
21
22 /*
23  * bootup setup stuff..
24  */
25
26 #include <linux/config.h>
27 #include <linux/init.h>
28 #include <linux/errno.h>
29 #include <linux/sched.h>
30 #include <linux/kernel.h>
31 #include <linux/mm.h>
32 #include <linux/stddef.h>
33 #include <linux/unistd.h>
34 #include <linux/ptrace.h>
35 #include <linux/slab.h>
36 #include <linux/user.h>
37 #include <linux/a.out.h>
38 #include <linux/tty.h>
39 #include <linux/string.h>
40 #include <linux/delay.h>
41 #include <linux/ioport.h>
42 #include <linux/major.h>
43 #include <linux/initrd.h>
44 #include <linux/vt_kern.h>
45 #include <linux/console.h>
46 #include <linux/ide.h>
47 #include <linux/pci.h>
48 #include <linux/adb.h>
49 #include <linux/cuda.h>
50 #include <linux/pmu.h>
51 #include <linux/irq.h>
52 #include <linux/seq_file.h>
53 #include <linux/root_dev.h>
54 #include <linux/bitops.h>
55 #include <linux/suspend.h>
56
57 #include <asm/reg.h>
58 #include <asm/sections.h>
59 #include <asm/prom.h>
60 #include <asm/system.h>
61 #include <asm/pgtable.h>
62 #include <asm/io.h>
63 #include <asm/pci-bridge.h>
64 #include <asm/ohare.h>
65 #include <asm/mediabay.h>
66 #include <asm/machdep.h>
67 #include <asm/dma.h>
68 #include <asm/bootx.h>
69 #include <asm/cputable.h>
70 #include <asm/btext.h>
71 #include <asm/pmac_feature.h>
72 #include <asm/time.h>
73 #include <asm/of_device.h>
74 #include <asm/mmu_context.h>
75
76 #include "pmac_pic.h"
77
78 #undef SHOW_GATWICK_IRQS
79
80 extern long pmac_time_init(void);
81 extern unsigned long pmac_get_rtc_time(void);
82 extern int pmac_set_rtc_time(unsigned long nowtime);
83 extern void pmac_read_rtc_time(void);
84 extern void pmac_calibrate_decr(void);
85 extern void pmac_pcibios_fixup(void);
86 extern void pmac_find_bridges(void);
87 extern unsigned long pmac_ide_get_base(int index);
88 extern void pmac_ide_init_hwif_ports(hw_regs_t *hw,
89         unsigned long data_port, unsigned long ctrl_port, int *irq);
90
91 extern void pmac_nvram_update(void);
92 extern unsigned char pmac_nvram_read_byte(int addr);
93 extern void pmac_nvram_write_byte(int addr, unsigned char val);
94 extern int pmac_pci_enable_device_hook(struct pci_dev *dev, int initial);
95 extern void pmac_pcibios_after_init(void);
96 extern int of_show_percpuinfo(struct seq_file *m, int i);
97
98 unsigned char drive_info;
99
100 int ppc_override_l2cr = 0;
101 int ppc_override_l2cr_value;
102 int has_l2cache = 0;
103
104 int pmac_newworld = 1;
105
106 static int current_root_goodness = -1;
107
108 extern int pmac_newworld;
109
110 #define DEFAULT_ROOT_DEVICE Root_SDA1   /* sda1 - slightly silly choice */
111
112 extern void zs_kgdb_hook(int tty_num);
113 static void ohare_init(void);
114 #ifdef CONFIG_BOOTX_TEXT
115 static void pmac_progress(char *s, unsigned short hex);
116 #endif
117
118 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
119
120 #ifdef CONFIG_SMP
121 extern struct smp_ops_t psurge_smp_ops;
122 extern struct smp_ops_t core99_smp_ops;
123 #endif /* CONFIG_SMP */
124
125 static int
126 pmac_show_cpuinfo(struct seq_file *m)
127 {
128         struct device_node *np;
129         char *pp;
130         int plen;
131         int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
132                 NULL, PMAC_MB_INFO_MODEL, 0);
133         unsigned int mbflags = (unsigned int)pmac_call_feature(PMAC_FTR_GET_MB_INFO,
134                 NULL, PMAC_MB_INFO_FLAGS, 0);
135         char* mbname;
136
137         if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME, (int)&mbname) != 0)
138                 mbname = "Unknown";
139
140         /* find motherboard type */
141         seq_printf(m, "machine\t\t: ");
142         np = find_devices("device-tree");
143         if (np != NULL) {
144                 pp = (char *) get_property(np, "model", NULL);
145                 if (pp != NULL)
146                         seq_printf(m, "%s\n", pp);
147                 else
148                         seq_printf(m, "PowerMac\n");
149                 pp = (char *) get_property(np, "compatible", &plen);
150                 if (pp != NULL) {
151                         seq_printf(m, "motherboard\t:");
152                         while (plen > 0) {
153                                 int l = strlen(pp) + 1;
154                                 seq_printf(m, " %s", pp);
155                                 plen -= l;
156                                 pp += l;
157                         }
158                         seq_printf(m, "\n");
159                 }
160         } else
161                 seq_printf(m, "PowerMac\n");
162
163         /* print parsed model */
164         seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
165         seq_printf(m, "pmac flags\t: %08x\n", mbflags);
166
167         /* find l2 cache info */
168         np = find_devices("l2-cache");
169         if (np == 0)
170                 np = find_type_devices("cache");
171         if (np != 0) {
172                 unsigned int *ic = (unsigned int *)
173                         get_property(np, "i-cache-size", NULL);
174                 unsigned int *dc = (unsigned int *)
175                         get_property(np, "d-cache-size", NULL);
176                 seq_printf(m, "L2 cache\t:");
177                 has_l2cache = 1;
178                 if (get_property(np, "cache-unified", NULL) != 0 && dc) {
179                         seq_printf(m, " %dK unified", *dc / 1024);
180                 } else {
181                         if (ic)
182                                 seq_printf(m, " %dK instruction", *ic / 1024);
183                         if (dc)
184                                 seq_printf(m, "%s %dK data",
185                                            (ic? " +": ""), *dc / 1024);
186                 }
187                 pp = get_property(np, "ram-type", NULL);
188                 if (pp)
189                         seq_printf(m, " %s", pp);
190                 seq_printf(m, "\n");
191         }
192
193         /* find ram info */
194         np = find_devices("memory");
195         if (np != 0) {
196                 int n;
197                 struct reg_property *reg = (struct reg_property *)
198                         get_property(np, "reg", &n);
199
200                 if (reg != 0) {
201                         unsigned long total = 0;
202
203                         for (n /= sizeof(struct reg_property); n > 0; --n)
204                                 total += (reg++)->size;
205                         seq_printf(m, "memory\t\t: %luMB\n", total >> 20);
206                 }
207         }
208
209         /* Checks "l2cr-value" property in the registry */
210         np = find_devices("cpus");
211         if (np == 0)
212                 np = find_type_devices("cpu");
213         if (np != 0) {
214                 unsigned int *l2cr = (unsigned int *)
215                         get_property(np, "l2cr-value", NULL);
216                 if (l2cr != 0) {
217                         seq_printf(m, "l2cr override\t: 0x%x\n", *l2cr);
218                 }
219         }
220
221         /* Indicate newworld/oldworld */
222         seq_printf(m, "pmac-generation\t: %s\n",
223                    pmac_newworld ? "NewWorld" : "OldWorld");
224
225
226         return 0;
227 }
228
229 static int
230 pmac_show_percpuinfo(struct seq_file *m, int i)
231 {
232 #ifdef CONFIG_CPU_FREQ_PMAC
233         extern unsigned int pmac_get_one_cpufreq(int i);
234         unsigned int freq = pmac_get_one_cpufreq(i);
235         if (freq != 0) {
236                 seq_printf(m, "clock\t\t: %dMHz\n", freq/1000);
237                 return 0;
238         }
239 #endif /* CONFIG_CPU_FREQ_PMAC */
240         return of_show_percpuinfo(m, i);
241 }
242
243 static volatile u32 *sysctrl_regs;
244
245 void __init
246 pmac_setup_arch(void)
247 {
248         struct device_node *cpu;
249         int *fp;
250         unsigned long pvr;
251
252         pvr = PVR_VER(mfspr(SPRN_PVR));
253
254         /* Set loops_per_jiffy to a half-way reasonable value,
255            for use until calibrate_delay gets called. */
256         cpu = find_type_devices("cpu");
257         if (cpu != 0) {
258                 fp = (int *) get_property(cpu, "clock-frequency", NULL);
259                 if (fp != 0) {
260                         if (pvr == 4 || pvr >= 8)
261                                 /* 604, G3, G4 etc. */
262                                 loops_per_jiffy = *fp / HZ;
263                         else
264                                 /* 601, 603, etc. */
265                                 loops_per_jiffy = *fp / (2*HZ);
266                 } else
267                         loops_per_jiffy = 50000000 / HZ;
268         }
269
270         /* this area has the CPU identification register
271            and some registers used by smp boards */
272         sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
273         ohare_init();
274
275         /* Lookup PCI hosts */
276         pmac_find_bridges();
277
278         /* Checks "l2cr-value" property in the registry */
279         if (cpu_has_feature(CPU_FTR_L2CR)) {
280                 struct device_node *np = find_devices("cpus");
281                 if (np == 0)
282                         np = find_type_devices("cpu");
283                 if (np != 0) {
284                         unsigned int *l2cr = (unsigned int *)
285                                 get_property(np, "l2cr-value", NULL);
286                         if (l2cr != 0) {
287                                 ppc_override_l2cr = 1;
288                                 ppc_override_l2cr_value = *l2cr;
289                                 _set_L2CR(0);
290                                 _set_L2CR(ppc_override_l2cr_value);
291                         }
292                 }
293         }
294
295         if (ppc_override_l2cr)
296                 printk(KERN_INFO "L2CR overriden (0x%x), backside cache is %s\n",
297                         ppc_override_l2cr_value, (ppc_override_l2cr_value & 0x80000000)
298                                 ? "enabled" : "disabled");
299
300 #ifdef CONFIG_KGDB
301         zs_kgdb_hook(0);
302 #endif
303
304 #ifdef CONFIG_ADB_CUDA
305         find_via_cuda();
306 #else
307         if (find_devices("via-cuda")) {
308                 printk("WARNING ! Your machine is Cuda based but your kernel\n");
309                 printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
310         }
311 #endif
312 #ifdef CONFIG_ADB_PMU
313         find_via_pmu();
314 #else
315         if (find_devices("via-pmu")) {
316                 printk("WARNING ! Your machine is PMU based but your kernel\n");
317                 printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
318         }
319 #endif
320 #ifdef CONFIG_NVRAM
321         pmac_nvram_init();
322 #endif
323 #ifdef CONFIG_BLK_DEV_INITRD
324         if (initrd_start)
325                 ROOT_DEV = Root_RAM0;
326         else
327 #endif
328                 ROOT_DEV = DEFAULT_ROOT_DEVICE;
329
330 #ifdef CONFIG_SMP
331         /* Check for Core99 */
332         if (find_devices("uni-n") || find_devices("u3"))
333                 ppc_md.smp_ops = &core99_smp_ops;
334         else
335                 ppc_md.smp_ops = &psurge_smp_ops;
336 #endif /* CONFIG_SMP */
337
338         pci_create_OF_bus_map();
339 }
340
341 static void __init ohare_init(void)
342 {
343         /*
344          * Turn on the L2 cache.
345          * We assume that we have a PSX memory controller iff
346          * we have an ohare I/O controller.
347          */
348         if (find_devices("ohare") != NULL) {
349                 if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
350                         if (sysctrl_regs[4] & 0x10)
351                                 sysctrl_regs[4] |= 0x04000020;
352                         else
353                                 sysctrl_regs[4] |= 0x04000000;
354                         if(has_l2cache)
355                                 printk(KERN_INFO "Level 2 cache enabled\n");
356                 }
357         }
358 }
359
360 char *bootpath;
361 char *bootdevice;
362 void *boot_host;
363 int boot_target;
364 int boot_part;
365 extern dev_t boot_dev;
366
367 #ifdef CONFIG_SCSI
368 void __init
369 note_scsi_host(struct device_node *node, void *host)
370 {
371         int l;
372         char *p;
373
374         l = strlen(node->full_name);
375         if (bootpath != NULL && bootdevice != NULL
376             && strncmp(node->full_name, bootdevice, l) == 0
377             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
378                 boot_host = host;
379                 /*
380                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
381                  * If you pass a path like scsi/sd@1:0 to canon, it returns
382                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
383                  * That is, the scsi target number doesn't get preserved.
384                  * So we pick the target number out of bootpath and use that.
385                  */
386                 p = strstr(bootpath, "/sd@");
387                 if (p != NULL) {
388                         p += 4;
389                         boot_target = simple_strtoul(p, NULL, 10);
390                         p = strchr(p, ':');
391                         if (p != NULL)
392                                 boot_part = simple_strtoul(p + 1, NULL, 10);
393                 }
394         }
395 }
396 EXPORT_SYMBOL(note_scsi_host);
397 #endif
398
399 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
400 static dev_t __init
401 find_ide_boot(void)
402 {
403         char *p;
404         int n;
405         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
406
407         if (bootdevice == NULL)
408                 return 0;
409         p = strrchr(bootdevice, '/');
410         if (p == NULL)
411                 return 0;
412         n = p - bootdevice;
413
414         return pmac_find_ide_boot(bootdevice, n);
415 }
416 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
417
418 static void __init
419 find_boot_device(void)
420 {
421 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
422         boot_dev = find_ide_boot();
423 #endif
424 }
425
426 static int initializing = 1;
427 /* TODO: Merge the suspend-to-ram with the common code !!!
428  * currently, this is a stub implementation for suspend-to-disk
429  * only
430  */
431
432 #ifdef CONFIG_SOFTWARE_SUSPEND
433
434 static int pmac_pm_prepare(suspend_state_t state)
435 {
436         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
437
438         return 0;
439 }
440
441 static int pmac_pm_enter(suspend_state_t state)
442 {
443         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
444
445         /* Giveup the lazy FPU & vec so we don't have to back them
446          * up from the low level code
447          */
448         enable_kernel_fp();
449
450 #ifdef CONFIG_ALTIVEC
451         if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
452                 enable_kernel_altivec();
453 #endif /* CONFIG_ALTIVEC */
454
455         return 0;
456 }
457
458 static int pmac_pm_finish(suspend_state_t state)
459 {
460         printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
461
462         /* Restore userland MMU context */
463         set_context(current->active_mm->context, current->active_mm->pgd);
464
465         return 0;
466 }
467
468 static struct pm_ops pmac_pm_ops = {
469         .pm_disk_mode   = PM_DISK_SHUTDOWN,
470         .prepare        = pmac_pm_prepare,
471         .enter          = pmac_pm_enter,
472         .finish         = pmac_pm_finish,
473 };
474
475 #endif /* CONFIG_SOFTWARE_SUSPEND */
476
477 static int pmac_late_init(void)
478 {
479         initializing = 0;
480 #ifdef CONFIG_SOFTWARE_SUSPEND
481         pm_set_ops(&pmac_pm_ops);
482 #endif /* CONFIG_SOFTWARE_SUSPEND */
483         return 0;
484 }
485
486 late_initcall(pmac_late_init);
487
488 /* can't be __init - can be called whenever a disk is first accessed */
489 void
490 note_bootable_part(dev_t dev, int part, int goodness)
491 {
492         static int found_boot = 0;
493         char *p;
494
495         if (!initializing)
496                 return;
497         if ((goodness <= current_root_goodness) &&
498             ROOT_DEV != DEFAULT_ROOT_DEVICE)
499                 return;
500         p = strstr(saved_command_line, "root=");
501         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
502                 return;
503
504         if (!found_boot) {
505                 find_boot_device();
506                 found_boot = 1;
507         }
508         if (!boot_dev || dev == boot_dev) {
509                 ROOT_DEV = dev + part;
510                 boot_dev = 0;
511                 current_root_goodness = goodness;
512         }
513 }
514
515 static void
516 pmac_restart(char *cmd)
517 {
518 #ifdef CONFIG_ADB_CUDA
519         struct adb_request req;
520 #endif /* CONFIG_ADB_CUDA */
521
522         switch (sys_ctrler) {
523 #ifdef CONFIG_ADB_CUDA
524         case SYS_CTRLER_CUDA:
525                 cuda_request(&req, NULL, 2, CUDA_PACKET,
526                              CUDA_RESET_SYSTEM);
527                 for (;;)
528                         cuda_poll();
529                 break;
530 #endif /* CONFIG_ADB_CUDA */
531 #ifdef CONFIG_ADB_PMU
532         case SYS_CTRLER_PMU:
533                 pmu_restart();
534                 break;
535 #endif /* CONFIG_ADB_PMU */
536         default: ;
537         }
538 }
539
540 static void
541 pmac_power_off(void)
542 {
543 #ifdef CONFIG_ADB_CUDA
544         struct adb_request req;
545 #endif /* CONFIG_ADB_CUDA */
546
547         switch (sys_ctrler) {
548 #ifdef CONFIG_ADB_CUDA
549         case SYS_CTRLER_CUDA:
550                 cuda_request(&req, NULL, 2, CUDA_PACKET,
551                              CUDA_POWERDOWN);
552                 for (;;)
553                         cuda_poll();
554                 break;
555 #endif /* CONFIG_ADB_CUDA */
556 #ifdef CONFIG_ADB_PMU
557         case SYS_CTRLER_PMU:
558                 pmu_shutdown();
559                 break;
560 #endif /* CONFIG_ADB_PMU */
561         default: ;
562         }
563 }
564
565 static void
566 pmac_halt(void)
567 {
568         pmac_power_off();
569 }
570
571 void __init pmac_init(void)
572 {
573         /* isa_io_base gets set in pmac_find_bridges */
574         isa_mem_base = PMAC_ISA_MEM_BASE;
575         pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
576         ISA_DMA_THRESHOLD = ~0L;
577         DMA_MODE_READ = 1;
578         DMA_MODE_WRITE = 2;
579
580         ppc_md.setup_arch     = pmac_setup_arch;
581         ppc_md.show_cpuinfo   = pmac_show_cpuinfo;
582         ppc_md.show_percpuinfo = pmac_show_percpuinfo;
583         ppc_md.irq_canonicalize = NULL;
584         ppc_md.init_IRQ       = pmac_pic_init;
585         ppc_md.get_irq        = pmac_get_irq; /* Changed later on ... */
586
587         ppc_md.pcibios_fixup  = pmac_pcibios_fixup;
588         ppc_md.pcibios_enable_device_hook = pmac_pci_enable_device_hook;
589         ppc_md.pcibios_after_init = pmac_pcibios_after_init;
590         ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
591
592         ppc_md.restart        = pmac_restart;
593         ppc_md.power_off      = pmac_power_off;
594         ppc_md.halt           = pmac_halt;
595
596         ppc_md.time_init      = pmac_time_init;
597         ppc_md.set_rtc_time   = pmac_set_rtc_time;
598         ppc_md.get_rtc_time   = pmac_get_rtc_time;
599         ppc_md.calibrate_decr = pmac_calibrate_decr;
600
601         ppc_md.feature_call   = pmac_do_feature_call;
602
603 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
604 #ifdef CONFIG_BLK_DEV_IDE_PMAC
605         ppc_ide_md.ide_init_hwif        = pmac_ide_init_hwif_ports;
606         ppc_ide_md.default_io_base      = pmac_ide_get_base;
607 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
608 #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
609
610 #ifdef CONFIG_BOOTX_TEXT
611         ppc_md.progress = pmac_progress;
612 #endif /* CONFIG_BOOTX_TEXT */
613
614         if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
615
616 }
617
618 #ifdef CONFIG_BOOTX_TEXT
619 static void __init
620 pmac_progress(char *s, unsigned short hex)
621 {
622         if (boot_text_mapped) {
623                 btext_drawstring(s);
624                 btext_drawchar('\n');
625         }
626 }
627 #endif /* CONFIG_BOOTX_TEXT */
628
629 static int __init
630 pmac_declare_of_platform_devices(void)
631 {
632         struct device_node *np;
633
634         np = find_devices("uni-n");
635         if (np) {
636                 for (np = np->child; np != NULL; np = np->sibling)
637                         if (strncmp(np->name, "i2c", 3) == 0) {
638                                 of_platform_device_create(np, "uni-n-i2c",
639                                                           NULL);
640                                 break;
641                         }
642         }
643         np = find_devices("u3");
644         if (np) {
645                 for (np = np->child; np != NULL; np = np->sibling)
646                         if (strncmp(np->name, "i2c", 3) == 0) {
647                                 of_platform_device_create(np, "u3-i2c",
648                                                           NULL);
649                                 break;
650                         }
651         }
652
653         np = find_devices("valkyrie");
654         if (np)
655                 of_platform_device_create(np, "valkyrie", NULL);
656         np = find_devices("platinum");
657         if (np)
658                 of_platform_device_create(np, "platinum", NULL);
659
660         return 0;
661 }
662
663 device_initcall(pmac_declare_of_platform_devices);