arch/ppc64/kernel/pmac_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
  55 #include <asm/processor.h>
  56 #include <asm/sections.h>
  57 #include <asm/prom.h>
  58 #include <asm/system.h>
  59 #include <asm/pgtable.h>
  60 #include <asm/bitops.h>
  61 #include <asm/io.h>
  62 #include <asm/pci-bridge.h>
  63 #include <asm/iommu.h>
  64 #include <asm/machdep.h>
  65 #include <asm/dma.h>
  66 #include <asm/bootx.h>
  67 #include <asm/btext.h>
  68 #include <asm/cputable.h>
  69 #include <asm/pmac_feature.h>
  70 #include <asm/time.h>
  71 #include <asm/of_device.h>
  72 #include <asm/lmb.h>
  73
  74 #include "pmac.h"
  75
  76 static int current_root_goodness = -1;
  77 #define DEFAULT_ROOT_DEVICE Root_SDA1   /* sda1 - slightly silly choice */
  78
  79 extern  int powersave_nap;
  80 int sccdbg;
  81
  82 extern void udbg_init_scc(struct device_node *np);
  83
  84 #ifdef CONFIG_BOOTX_TEXT
  85 void pmac_progress(char *s, unsigned short hex);
  86 #endif
  87
  88 void __pmac pmac_show_cpuinfo(struct seq_file *m)
  89 {
  90         struct device_node *np;
  91         char *pp;
  92         int plen;
  93         char* mbname;
  94         int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
  95                                         PMAC_MB_INFO_MODEL, 0);
  96         unsigned int mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
  97                                                  PMAC_MB_INFO_FLAGS, 0);
  98
  99         if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
 100                               (long)&mbname) != 0)
 101                 mbname = "Unknown";
 102
 103         /* find motherboard type */
 104         seq_printf(m, "machine\t\t: ");
 105         np = find_devices("device-tree");
 106         if (np != NULL) {
 107                 pp = (char *) get_property(np, "model", NULL);
 108                 if (pp != NULL)
 109                         seq_printf(m, "%s\n", pp);
 110                 else
 111                         seq_printf(m, "PowerMac\n");
 112                 pp = (char *) get_property(np, "compatible", &plen);
 113                 if (pp != NULL) {
 114                         seq_printf(m, "motherboard\t:");
 115                         while (plen > 0) {
 116                                 int l = strlen(pp) + 1;
 117                                 seq_printf(m, " %s", pp);
 118                                 plen -= l;
 119                                 pp += l;
 120                         }
 121                         seq_printf(m, "\n");
 122                 }
 123         } else
 124                 seq_printf(m, "PowerMac\n");
 125
 126         /* print parsed model */
 127         seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
 128         seq_printf(m, "pmac flags\t: %08x\n", mbflags);
 129
 130         /* Indicate newworld */
 131         seq_printf(m, "pmac-generation\t: NewWorld\n");
 132 }
 133
 134
 135 void __init pmac_setup_arch(void)
 136 {
 137         struct device_node *cpu;
 138         int *fp;
 139         unsigned long pvr;
 140
 141         pvr = PVR_VER(mfspr(PVR));
 142
 143         /* Set loops_per_jiffy to a half-way reasonable value,
 144            for use until calibrate_delay gets called. */
 145         cpu = find_type_devices("cpu");
 146         if (cpu != 0) {
 147                 fp = (int *) get_property(cpu, "clock-frequency", NULL);
 148                 if (fp != 0) {
 149                         if (pvr == 4 || pvr >= 8)
 150                                 /* 604, G3, G4 etc. */
 151                                 loops_per_jiffy = *fp / HZ;
 152                         else
 153                                 /* 601, 603, etc. */
 154                                 loops_per_jiffy = *fp / (2*HZ);
 155                 } else
 156                         loops_per_jiffy = 50000000 / HZ;
 157         }
 158
 159         /* We can NAP */
 160         powersave_nap = 1;
 161
 162         /* Initialize the PMU */
 163         find_via_pmu();
 164
 165         /* Init NVRAM access */
 166         pmac_nvram_init();
 167
 168         /* Setup SMP callback */
 169 #ifdef CONFIG_SMP
 170         pmac_setup_smp();
 171 #endif
 172
 173         /* Setup the PCI DMA to "direct" by default. May be overriden
 174          * by iommu later on
 175          */
 176         pci_dma_init_direct();
 177
 178         /* Lookup PCI hosts */
 179         pmac_pci_init();
 180
 181 #ifdef CONFIG_DUMMY_CONSOLE
 182         conswitchp = &dummy_con;
 183 #endif
 184 }
 185
 186 extern char *bootpath;
 187 extern char *bootdevice;
 188 void *boot_host;
 189 int boot_target;
 190 int boot_part;
 191 extern dev_t boot_dev;
 192
 193 #ifdef CONFIG_SCSI
 194 void __init note_scsi_host(struct device_node *node, void *host)
 195 {
 196         int l;
 197         char *p;
 198
 199         l = strlen(node->full_name);
 200         if (bootpath != NULL && bootdevice != NULL
 201             && strncmp(node->full_name, bootdevice, l) == 0
 202             && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
 203                 boot_host = host;
 204                 /*
 205                  * There's a bug in OF 1.0.5.  (Why am I not surprised.)
 206                  * If you pass a path like scsi/sd@1:0 to canon, it returns
 207                  * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
 208                  * That is, the scsi target number doesn't get preserved.
 209                  * So we pick the target number out of bootpath and use that.
 210                  */
 211                 p = strstr(bootpath, "/sd@");
 212                 if (p != NULL) {
 213                         p += 4;
 214                         boot_target = simple_strtoul(p, NULL, 10);
 215                         p = strchr(p, ':');
 216                         if (p != NULL)
 217                                 boot_part = simple_strtoul(p + 1, NULL, 10);
 218                 }
 219         }
 220 }
 221 #endif
 222
 223 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 224 static dev_t __init find_ide_boot(void)
 225 {
 226         char *p;
 227         int n;
 228         dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
 229
 230         if (bootdevice == NULL)
 231                 return 0;
 232         p = strrchr(bootdevice, '/');
 233         if (p == NULL)
 234                 return 0;
 235         n = p - bootdevice;
 236
 237         return pmac_find_ide_boot(bootdevice, n);
 238 }
 239 #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
 240
 241 void __init find_boot_device(void)
 242 {
 243 #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
 244         boot_dev = find_ide_boot();
 245 #endif
 246 }
 247
 248 static int initializing = 1;
 249
 250 static int pmac_late_init(void)
 251 {
 252         initializing = 0;
 253         return 0;
 254 }
 255
 256 late_initcall(pmac_late_init);
 257
 258 /* can't be __init - can be called whenever a disk is first accessed */
 259 void __pmac note_bootable_part(dev_t dev, int part, int goodness)
 260 {
 261         static int found_boot = 0;
 262         char *p;
 263
 264         if (!initializing)
 265                 return;
 266         if ((goodness <= current_root_goodness) &&
 267             ROOT_DEV != DEFAULT_ROOT_DEVICE)
 268                 return;
 269         p = strstr(saved_command_line, "root=");
 270         if (p != NULL && (p == saved_command_line || p[-1] == ' '))
 271                 return;
 272
 273         if (!found_boot) {
 274                 find_boot_device();
 275                 found_boot = 1;
 276         }
 277         if (!boot_dev || dev == boot_dev) {
 278                 ROOT_DEV = dev + part;
 279                 boot_dev = 0;
 280                 current_root_goodness = goodness;
 281         }
 282 }
 283
 284 void __pmac pmac_restart(char *cmd)
 285 {
 286         pmu_restart();
 287 }
 288
 289 void __pmac pmac_power_off(void)
 290 {
 291         pmu_shutdown();
 292 }
 293
 294 void __pmac pmac_halt(void)
 295 {
 296         pmac_power_off();
 297 }
 298
 299 #ifdef CONFIG_BOOTX_TEXT
 300 static int dummy_getc_poll(void)
 301 {
 302         return -1;
 303 }
 304
 305 static unsigned char dummy_getc(void)
 306 {
 307         return 0;
 308 }
 309
 310 static void btext_putc(unsigned char c)
 311 {
 312         btext_drawchar(c);
 313 }
 314 #endif /* CONFIG_BOOTX_TEXT */
 315
 316 /*
 317  * Early initialization.
 318  * Relocation is on but do not reference unbolted pages
 319  * Also, device-tree hasn't been "finished", so don't muck with
 320  * it too much
 321  */
 322 void __init pmac_init_early(void)
 323 {
 324         hpte_init_pSeries();
 325
 326 #ifdef CONFIG_BOOTX_TEXT
 327         ppc_md.udbg_putc = btext_putc;
 328         ppc_md.udbg_getc = dummy_getc;
 329         ppc_md.udbg_getc_poll = dummy_getc_poll;
 330 #endif /* CONFIG_BOOTX_TEXT */
 331 }
 332
 333 extern void* OpenPIC_Addr;
 334 extern void* OpenPIC2_Addr;
 335 extern u_int OpenPIC_NumInitSenses;
 336 extern u_char *OpenPIC_InitSenses;
 337 extern void openpic_init(int main_pic, int offset, unsigned char* chrp_ack,
 338                          int programmer_switch_irq);
 339 extern void openpic2_init(int offset);
 340 extern int openpic_get_irq(struct pt_regs *regs);
 341 extern int openpic2_get_irq(struct pt_regs *regs);
 342
 343 static int pmac_cascade_irq = -1;
 344
 345 static irqreturn_t pmac_u3_do_cascade(int cpl, void *dev_id, struct pt_regs *regs)
 346 {
 347         int irq;
 348
 349         for (;;) {
 350                 irq = openpic2_get_irq(regs);
 351                 if (irq == -1)
 352                         break;
 353                 ppc_irq_dispatch_handler(regs, irq);
 354         }
 355         return IRQ_HANDLED;
 356 }
 357
 358 static __init void pmac_init_IRQ(void)
 359 {
 360         struct device_node *irqctrler  = NULL;
 361         struct device_node *irqctrler2 = NULL;
 362         struct device_node *np = NULL;
 363
 364         /* We first try to detect Apple's new Core99 chipset, since mac-io
 365          * is quite different on those machines and contains an IBM MPIC2.
 366          */
 367         while ((np = of_find_node_by_type(np, "open-pic")) != NULL) {
 368                 struct device_node *parent = of_get_parent(np);
 369                 if (parent && !strcmp(parent->name, "u3"))
 370                         irqctrler2 = of_node_get(np);
 371                 else
 372                         irqctrler = of_node_get(np);
 373                 of_node_put(parent);
 374         }
 375         if (irqctrler != NULL && irqctrler->n_addrs > 0) {
 376                 unsigned char senses[128];
 377
 378                 printk(KERN_INFO "PowerMac using OpenPIC irq controller at 0x%08x\n",
 379                        (unsigned int)irqctrler->addrs[0].address);
 380
 381                 prom_get_irq_senses(senses, 0, 128);
 382                 OpenPIC_InitSenses = senses;
 383                 OpenPIC_NumInitSenses = 128;
 384                 OpenPIC_Addr = ioremap(irqctrler->addrs[0].address,
 385                                        irqctrler->addrs[0].size);
 386                 openpic_init(1, 0, NULL, -1);
 387
 388                 if (irqctrler2 != NULL && irqctrler2->n_intrs > 0 &&
 389                     irqctrler2->n_addrs > 0) {
 390                         printk(KERN_INFO "Slave OpenPIC at 0x%08x hooked on IRQ %d\n",
 391                                (u32)irqctrler2->addrs[0].address,
 392                                irqctrler2->intrs[0].line);
 393                         pmac_call_feature(PMAC_FTR_ENABLE_MPIC, irqctrler2, 0, 0);
 394                         OpenPIC2_Addr = ioremap(irqctrler2->addrs[0].address,
 395                                                 irqctrler2->addrs[0].size);
 396                         prom_get_irq_senses(senses, 128, 128 + 128);
 397                         OpenPIC_InitSenses = senses;
 398                         OpenPIC_NumInitSenses = 128;
 399                         openpic2_init(128);
 400                         pmac_cascade_irq = irqctrler2->intrs[0].line;
 401                 }
 402         }
 403         of_node_put(irqctrler);
 404         of_node_put(irqctrler2);
 405 }
 406
 407 /* We cannot do request_irq too early ... Right now, we get the
 408  * cascade as a core_initcall, which should be fine for our needs
 409  */
 410 static int __init pmac_irq_cascade_init(void)
 411 {
 412         if (request_irq(pmac_cascade_irq, pmac_u3_do_cascade, 0,
 413                         "U3->K2 Cascade", NULL))
 414                 printk(KERN_ERR "Unable to get OpenPIC IRQ for cascade\n");
 415         return 0;
 416 }
 417
 418 core_initcall(pmac_irq_cascade_init);
 419
 420 void __init pmac_init(unsigned long r3, unsigned long r4, unsigned long r5,
 421                       unsigned long r6, unsigned long r7)
 422 {
 423         /* Probe motherboard chipset */
 424         pmac_feature_init();
 425
 426         /* Init SCC */
 427         if (strstr(cmd_line, "sccdbg")) {
 428                 sccdbg = 1;
 429                 udbg_init_scc(NULL);
 430         }
 431
 432         /* Fill up the machine description */
 433         ppc_md.setup_arch     = pmac_setup_arch;
 434         ppc_md.get_cpuinfo    = pmac_show_cpuinfo;
 435
 436         ppc_md.init_IRQ       = pmac_init_IRQ;
 437         ppc_md.get_irq        = openpic_get_irq;
 438
 439         ppc_md.pcibios_fixup  = pmac_pcibios_fixup;
 440
 441         ppc_md.restart        = pmac_restart;
 442         ppc_md.power_off      = pmac_power_off;
 443         ppc_md.halt           = pmac_halt;
 444
 445         ppc_md.get_boot_time  = pmac_get_boot_time;
 446         ppc_md.set_rtc_time   = pmac_set_rtc_time;
 447         ppc_md.get_rtc_time   = pmac_get_rtc_time;
 448         ppc_md.calibrate_decr = pmac_calibrate_decr;
 449
 450         ppc_md.feature_call   = pmac_do_feature_call;
 451
 452
 453 #ifdef CONFIG_BOOTX_TEXT
 454         ppc_md.progress       = pmac_progress;
 455 #endif /* CONFIG_BOOTX_TEXT */
 456
 457         if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
 458
 459 }
 460
 461 #ifdef CONFIG_BOOTX_TEXT
 462 void __init pmac_progress(char *s, unsigned short hex)
 463 {
 464         if (sccdbg) {
 465                 udbg_puts(s);
 466                 udbg_putc('\n');
 467         }
 468         else if (boot_text_mapped) {
 469                 btext_drawstring(s);
 470                 btext_drawchar('\n');
 471         }
 472 }
 473 #endif /* CONFIG_BOOTX_TEXT */
 474
 475 static int __init pmac_declare_of_platform_devices(void)
 476 {
 477         struct device_node *np;
 478
 479         np = find_devices("u3");
 480         if (np) {
 481                 for (np = np->child; np != NULL; np = np->sibling)
 482                         if (strncmp(np->name, "i2c", 3) == 0) {
 483                                 of_platform_device_create(np, "u3-i2c");
 484                                 break;
 485                         }
 486         }
 487
 488         return 0;
 489 }
 490
 491 device_initcall(pmac_declare_of_platform_devices);