drivers/macintosh/via-pmu.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Device driver for the PMU in Apple PowerBooks and PowerMacs.
   4  *
   5  * The VIA (versatile interface adapter) interfaces to the PMU,
   6  * a 6805 microprocessor core whose primary function is to control
   7  * battery charging and system power on the PowerBook 3400 and 2400.
   8  * The PMU also controls the ADB (Apple Desktop Bus) which connects
   9  * to the keyboard and mouse, as well as the non-volatile RAM
  10  * and the RTC (real time clock) chip.
  11  *
  12  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
  13  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
  14  * Copyright (C) 2006-2007 Johannes Berg
  15  *
  16  * THIS DRIVER IS BECOMING A TOTAL MESS !
  17  *  - Cleanup atomically disabling reply to PMU events after
  18  *    a sleep or a freq. switch
  19  *
  20  */
  21 #include <stdarg.h>
  22 #include <linux/mutex.h>
  23 #include <linux/types.h>
  24 #include <linux/errno.h>
  25 #include <linux/kernel.h>
  26 #include <linux/delay.h>
  27 #include <linux/sched/signal.h>
  28 #include <linux/miscdevice.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/pci.h>
  31 #include <linux/slab.h>
  32 #include <linux/poll.h>
  33 #include <linux/adb.h>
  34 #include <linux/pmu.h>
  35 #include <linux/cuda.h>
  36 #include <linux/module.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/pm.h>
  39 #include <linux/proc_fs.h>
  40 #include <linux/seq_file.h>
  41 #include <linux/init.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/device.h>
  44 #include <linux/syscore_ops.h>
  45 #include <linux/freezer.h>
  46 #include <linux/syscalls.h>
  47 #include <linux/suspend.h>
  48 #include <linux/cpu.h>
  49 #include <linux/compat.h>
  50 #include <linux/of_address.h>
  51 #include <linux/of_irq.h>
  52 #include <linux/uaccess.h>
  53 #include <asm/machdep.h>
  54 #include <asm/io.h>
  55 #include <asm/pgtable.h>
  56 #include <asm/sections.h>
  57 #include <asm/irq.h>
  58 #ifdef CONFIG_PPC_PMAC
  59 #include <asm/pmac_feature.h>
  60 #include <asm/pmac_pfunc.h>
  61 #include <asm/pmac_low_i2c.h>
  62 #include <asm/prom.h>
  63 #include <asm/mmu_context.h>
  64 #include <asm/cputable.h>
  65 #include <asm/time.h>
  66 #include <asm/backlight.h>
  67 #else
  68 #include <asm/macintosh.h>
  69 #include <asm/macints.h>
  70 #include <asm/mac_via.h>
  71 #endif
  72
  73 #include "via-pmu-event.h"
  74
  75 /* Some compile options */
  76 #undef DEBUG_SLEEP
  77
  78 /* Misc minor number allocated for /dev/pmu */
  79 #define PMU_MINOR               154
  80
  81 /* How many iterations between battery polls */
  82 #define BATTERY_POLLING_COUNT   2
  83
  84 static DEFINE_MUTEX(pmu_info_proc_mutex);
  85
  86 /* VIA registers - spaced 0x200 bytes apart */
  87 #define RS              0x200           /* skip between registers */
  88 #define B               0               /* B-side data */
  89 #define A               RS              /* A-side data */
  90 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  91 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  92 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  93 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  94 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  95 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  96 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  97 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  98 #define SR              (10*RS)         /* Shift register */
  99 #define ACR             (11*RS)         /* Auxiliary control register */
 100 #define PCR             (12*RS)         /* Peripheral control register */
 101 #define IFR             (13*RS)         /* Interrupt flag register */
 102 #define IER             (14*RS)         /* Interrupt enable register */
 103 #define ANH             (15*RS)         /* A-side data, no handshake */
 104
 105 /* Bits in B data register: both active low */
 106 #ifdef CONFIG_PPC_PMAC
 107 #define TACK            0x08            /* Transfer acknowledge (input) */
 108 #define TREQ            0x10            /* Transfer request (output) */
 109 #else
 110 #define TACK            0x02
 111 #define TREQ            0x04
 112 #endif
 113
 114 /* Bits in ACR */
 115 #define SR_CTRL         0x1c            /* Shift register control bits */
 116 #define SR_EXT          0x0c            /* Shift on external clock */
 117 #define SR_OUT          0x10            /* Shift out if 1 */
 118
 119 /* Bits in IFR and IER */
 120 #define IER_SET         0x80            /* set bits in IER */
 121 #define IER_CLR         0               /* clear bits in IER */
 122 #define SR_INT          0x04            /* Shift register full/empty */
 123 #define CB2_INT         0x08
 124 #define CB1_INT         0x10            /* transition on CB1 input */
 125
 126 static volatile enum pmu_state {
 127         uninitialized = 0,
 128         idle,
 129         sending,
 130         intack,
 131         reading,
 132         reading_intr,
 133         locked,
 134 } pmu_state;
 135
 136 static volatile enum int_data_state {
 137         int_data_empty,
 138         int_data_fill,
 139         int_data_ready,
 140         int_data_flush
 141 } int_data_state[2] = { int_data_empty, int_data_empty };
 142
 143 static struct adb_request *current_req;
 144 static struct adb_request *last_req;
 145 static struct adb_request *req_awaiting_reply;
 146 static unsigned char interrupt_data[2][32];
 147 static int interrupt_data_len[2];
 148 static int int_data_last;
 149 static unsigned char *reply_ptr;
 150 static int data_index;
 151 static int data_len;
 152 static volatile int adb_int_pending;
 153 static volatile int disable_poll;
 154 static int pmu_kind = PMU_UNKNOWN;
 155 static int pmu_fully_inited;
 156 static int pmu_has_adb;
 157 #ifdef CONFIG_PPC_PMAC
 158 static volatile unsigned char __iomem *via1;
 159 static volatile unsigned char __iomem *via2;
 160 static struct device_node *vias;
 161 static struct device_node *gpio_node;
 162 #endif
 163 static unsigned char __iomem *gpio_reg;
 164 static int gpio_irq = 0;
 165 static int gpio_irq_enabled = -1;
 166 static volatile int pmu_suspended;
 167 static spinlock_t pmu_lock;
 168 static u8 pmu_intr_mask;
 169 static int pmu_version;
 170 static int drop_interrupts;
 171 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 172 static int option_lid_wakeup = 1;
 173 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
 174 static unsigned long async_req_locks;
 175
 176 #define NUM_IRQ_STATS 13
 177 static unsigned int pmu_irq_stats[NUM_IRQ_STATS];
 178
 179 static struct proc_dir_entry *proc_pmu_root;
 180 static struct proc_dir_entry *proc_pmu_info;
 181 static struct proc_dir_entry *proc_pmu_irqstats;
 182 static struct proc_dir_entry *proc_pmu_options;
 183 static int option_server_mode;
 184
 185 int pmu_battery_count;
 186 int pmu_cur_battery;
 187 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 188 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 189 static int query_batt_timer = BATTERY_POLLING_COUNT;
 190 static struct adb_request batt_req;
 191 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 192
 193 int __fake_sleep;
 194 int asleep;
 195
 196 #ifdef CONFIG_ADB
 197 static int adb_dev_map;
 198 static int pmu_adb_flags;
 199
 200 static int pmu_probe(void);
 201 static int pmu_init(void);
 202 static int pmu_send_request(struct adb_request *req, int sync);
 203 static int pmu_adb_autopoll(int devs);
 204 static int pmu_adb_reset_bus(void);
 205 #endif /* CONFIG_ADB */
 206
 207 static int init_pmu(void);
 208 static void pmu_start(void);
 209 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
 210 static irqreturn_t gpio1_interrupt(int irq, void *arg);
 211 static int pmu_info_proc_show(struct seq_file *m, void *v);
 212 static int pmu_irqstats_proc_show(struct seq_file *m, void *v);
 213 static int pmu_battery_proc_show(struct seq_file *m, void *v);
 214 static void pmu_pass_intr(unsigned char *data, int len);
 215 static const struct file_operations pmu_options_proc_fops;
 216
 217 #ifdef CONFIG_ADB
 218 const struct adb_driver via_pmu_driver = {
 219         .name         = "PMU",
 220         .probe        = pmu_probe,
 221         .init         = pmu_init,
 222         .send_request = pmu_send_request,
 223         .autopoll     = pmu_adb_autopoll,
 224         .poll         = pmu_poll_adb,
 225         .reset_bus    = pmu_adb_reset_bus,
 226 };
 227 #endif /* CONFIG_ADB */
 228
 229 extern void low_sleep_handler(void);
 230 extern void enable_kernel_altivec(void);
 231 extern void enable_kernel_fp(void);
 232
 233 #ifdef DEBUG_SLEEP
 234 int pmu_polled_request(struct adb_request *req);
 235 void pmu_blink(int n);
 236 #endif
 237
 238 /*
 239  * This table indicates for each PMU opcode:
 240  * - the number of data bytes to be sent with the command, or -1
 241  *   if a length byte should be sent,
 242  * - the number of response bytes which the PMU will return, or
 243  *   -1 if it will send a length byte.
 244  */
 245 static const s8 pmu_data_len[256][2] = {
 246 /*         0       1       2       3       4       5       6       7  */
 247 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 248 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 249 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 250 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 251 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 252 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 253 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 254 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 255 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 256 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 257 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 258 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 259 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 260 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 261 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 262 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 263 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 264 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 265 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 266 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 267 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 268 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 269 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 270 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 271 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 272 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 273 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 274 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 275 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 276 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 277 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 278 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 279 };
 280
 281 static char *pbook_type[] = {
 282         "Unknown PowerBook",
 283         "PowerBook 2400/3400/3500(G3)",
 284         "PowerBook G3 Series",
 285         "1999 PowerBook G3",
 286         "Core99"
 287 };
 288
 289 int __init find_via_pmu(void)
 290 {
 291 #ifdef CONFIG_PPC_PMAC
 292         u64 taddr;
 293         const u32 *reg;
 294
 295         if (pmu_state != uninitialized)
 296                 return 1;
 297         vias = of_find_node_by_name(NULL, "via-pmu");
 298         if (vias == NULL)
 299                 return 0;
 300
 301         reg = of_get_property(vias, "reg", NULL);
 302         if (reg == NULL) {
 303                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 304                 goto fail;
 305         }
 306         taddr = of_translate_address(vias, reg);
 307         if (taddr == OF_BAD_ADDR) {
 308                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 309                 goto fail;
 310         }
 311
 312         spin_lock_init(&pmu_lock);
 313
 314         pmu_has_adb = 1;
 315
 316         pmu_intr_mask = PMU_INT_PCEJECT |
 317                         PMU_INT_SNDBRT |
 318                         PMU_INT_ADB |
 319                         PMU_INT_TICK;
 320
 321         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 322             || of_device_is_compatible(vias->parent, "ohare")))
 323                 pmu_kind = PMU_OHARE_BASED;
 324         else if (of_device_is_compatible(vias->parent, "paddington"))
 325                 pmu_kind = PMU_PADDINGTON_BASED;
 326         else if (of_device_is_compatible(vias->parent, "heathrow"))
 327                 pmu_kind = PMU_HEATHROW_BASED;
 328         else if (of_device_is_compatible(vias->parent, "Keylargo")
 329                  || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
 330                 struct device_node *gpiop;
 331                 struct device_node *adbp;
 332                 u64 gaddr = OF_BAD_ADDR;
 333
 334                 pmu_kind = PMU_KEYLARGO_BASED;
 335                 adbp = of_find_node_by_type(NULL, "adb");
 336                 pmu_has_adb = (adbp != NULL);
 337                 of_node_put(adbp);
 338                 pmu_intr_mask = PMU_INT_PCEJECT |
 339                                 PMU_INT_SNDBRT |
 340                                 PMU_INT_ADB |
 341                                 PMU_INT_TICK |
 342                                 PMU_INT_ENVIRONMENT;
 343
 344                 gpiop = of_find_node_by_name(NULL, "gpio");
 345                 if (gpiop) {
 346                         reg = of_get_property(gpiop, "reg", NULL);
 347                         if (reg)
 348                                 gaddr = of_translate_address(gpiop, reg);
 349                         if (gaddr != OF_BAD_ADDR)
 350                                 gpio_reg = ioremap(gaddr, 0x10);
 351                         of_node_put(gpiop);
 352                 }
 353                 if (gpio_reg == NULL) {
 354                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 355                         goto fail;
 356                 }
 357         } else
 358                 pmu_kind = PMU_UNKNOWN;
 359
 360         via1 = via2 = ioremap(taddr, 0x2000);
 361         if (via1 == NULL) {
 362                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 363                 goto fail_via_remap;
 364         }
 365
 366         out_8(&via1[IER], IER_CLR | 0x7f);      /* disable all intrs */
 367         out_8(&via1[IFR], 0x7f);                        /* clear IFR */
 368
 369         pmu_state = idle;
 370
 371         if (!init_pmu())
 372                 goto fail_init;
 373
 374         sys_ctrler = SYS_CTRLER_PMU;
 375
 376         return 1;
 377
 378  fail_init:
 379         iounmap(via1);
 380         via1 = via2 = NULL;
 381  fail_via_remap:
 382         iounmap(gpio_reg);
 383         gpio_reg = NULL;
 384  fail:
 385         of_node_put(vias);
 386         vias = NULL;
 387         pmu_state = uninitialized;
 388         return 0;
 389 #else
 390         if (macintosh_config->adb_type != MAC_ADB_PB2)
 391                 return 0;
 392
 393         pmu_kind = PMU_UNKNOWN;
 394
 395         spin_lock_init(&pmu_lock);
 396
 397         pmu_has_adb = 1;
 398
 399         pmu_intr_mask = PMU_INT_PCEJECT |
 400                         PMU_INT_SNDBRT |
 401                         PMU_INT_ADB |
 402                         PMU_INT_TICK;
 403
 404         pmu_state = idle;
 405
 406         if (!init_pmu()) {
 407                 pmu_state = uninitialized;
 408                 return 0;
 409         }
 410
 411         return 1;
 412 #endif /* !CONFIG_PPC_PMAC */
 413 }
 414
 415 #ifdef CONFIG_ADB
 416 static int pmu_probe(void)
 417 {
 418         return pmu_state == uninitialized ? -ENODEV : 0;
 419 }
 420
 421 static int pmu_init(void)
 422 {
 423         return pmu_state == uninitialized ? -ENODEV : 0;
 424 }
 425 #endif /* CONFIG_ADB */
 426
 427 /*
 428  * We can't wait until pmu_init gets called, that happens too late.
 429  * It happens after IDE and SCSI initialization, which can take a few
 430  * seconds, and by that time the PMU could have given up on us and
 431  * turned us off.
 432  * Thus this is called with arch_initcall rather than device_initcall.
 433  */
 434 static int __init via_pmu_start(void)
 435 {
 436         unsigned int __maybe_unused irq;
 437
 438         if (pmu_state == uninitialized)
 439                 return -ENODEV;
 440
 441         batt_req.complete = 1;
 442
 443 #ifdef CONFIG_PPC_PMAC
 444         irq = irq_of_parse_and_map(vias, 0);
 445         if (!irq) {
 446                 printk(KERN_ERR "via-pmu: can't map interrupt\n");
 447                 return -ENODEV;
 448         }
 449         /* We set IRQF_NO_SUSPEND because we don't want the interrupt
 450          * to be disabled between the 2 passes of driver suspend, we
 451          * control our own disabling for that one
 452          */
 453         if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
 454                         "VIA-PMU", (void *)0)) {
 455                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 456                 return -ENODEV;
 457         }
 458
 459         if (pmu_kind == PMU_KEYLARGO_BASED) {
 460                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 461                 if (gpio_node == NULL)
 462                         gpio_node = of_find_node_by_name(NULL,
 463                                                          "pmu-interrupt");
 464                 if (gpio_node)
 465                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 466
 467                 if (gpio_irq) {
 468                         if (request_irq(gpio_irq, gpio1_interrupt,
 469                                         IRQF_NO_SUSPEND, "GPIO1 ADB",
 470                                         (void *)0))
 471                                 printk(KERN_ERR "pmu: can't get irq %d"
 472                                        " (GPIO1)\n", gpio_irq);
 473                         else
 474                                 gpio_irq_enabled = 1;
 475                 }
 476         }
 477
 478         /* Enable interrupts */
 479         out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
 480 #else
 481         if (request_irq(IRQ_MAC_ADB_SR, via_pmu_interrupt, IRQF_NO_SUSPEND,
 482                         "VIA-PMU-SR", NULL)) {
 483                 pr_err("%s: couldn't get SR irq\n", __func__);
 484                 return -ENODEV;
 485         }
 486         if (request_irq(IRQ_MAC_ADB_CL, via_pmu_interrupt, IRQF_NO_SUSPEND,
 487                         "VIA-PMU-CL", NULL)) {
 488                 pr_err("%s: couldn't get CL irq\n", __func__);
 489                 free_irq(IRQ_MAC_ADB_SR, NULL);
 490                 return -ENODEV;
 491         }
 492 #endif /* !CONFIG_PPC_PMAC */
 493
 494         pmu_fully_inited = 1;
 495
 496         /* Make sure PMU settle down before continuing. This is _very_ important
 497          * since the IDE probe may shut interrupts down for quite a bit of time. If
 498          * a PMU communication is pending while this happens, the PMU may timeout
 499          * Not that on Core99 machines, the PMU keeps sending us environement
 500          * messages, we should find a way to either fix IDE or make it call
 501          * pmu_suspend() before masking interrupts. This can also happens while
 502          * scolling with some fbdevs.
 503          */
 504         do {
 505                 pmu_poll();
 506         } while (pmu_state != idle);
 507
 508         return 0;
 509 }
 510
 511 arch_initcall(via_pmu_start);
 512
 513 /*
 514  * This has to be done after pci_init, which is a subsys_initcall.
 515  */
 516 static int __init via_pmu_dev_init(void)
 517 {
 518         if (pmu_state == uninitialized)
 519                 return -ENODEV;
 520
 521 #ifdef CONFIG_PMAC_BACKLIGHT
 522         /* Initialize backlight */
 523         pmu_backlight_init();
 524 #endif
 525
 526 #ifdef CONFIG_PPC32
 527         if (of_machine_is_compatible("AAPL,3400/2400") ||
 528                 of_machine_is_compatible("AAPL,3500")) {
 529                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 530                         NULL, PMAC_MB_INFO_MODEL, 0);
 531                 pmu_battery_count = 1;
 532                 if (mb == PMAC_TYPE_COMET)
 533                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 534                 else
 535                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 536         } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
 537                 of_machine_is_compatible("PowerBook1,1")) {
 538                 pmu_battery_count = 2;
 539                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 540                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 541         } else {
 542                 struct device_node* prim =
 543                         of_find_node_by_name(NULL, "power-mgt");
 544                 const u32 *prim_info = NULL;
 545                 if (prim)
 546                         prim_info = of_get_property(prim, "prim-info", NULL);
 547                 if (prim_info) {
 548                         /* Other stuffs here yet unknown */
 549                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 550                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 551                         if (pmu_battery_count > 1)
 552                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 553                 }
 554                 of_node_put(prim);
 555         }
 556 #endif /* CONFIG_PPC32 */
 557
 558         /* Create /proc/pmu */
 559         proc_pmu_root = proc_mkdir("pmu", NULL);
 560         if (proc_pmu_root) {
 561                 long i;
 562
 563                 for (i=0; i<pmu_battery_count; i++) {
 564                         char title[16];
 565                         sprintf(title, "battery_%ld", i);
 566                         proc_pmu_batt[i] = proc_create_single_data(title, 0,
 567                                         proc_pmu_root, pmu_battery_proc_show,
 568                                         (void *)i);
 569                 }
 570
 571                 proc_pmu_info = proc_create_single("info", 0, proc_pmu_root,
 572                                 pmu_info_proc_show);
 573                 proc_pmu_irqstats = proc_create_single("interrupts", 0,
 574                                 proc_pmu_root, pmu_irqstats_proc_show);
 575                 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
 576                                                 &pmu_options_proc_fops);
 577         }
 578         return 0;
 579 }
 580
 581 device_initcall(via_pmu_dev_init);
 582
 583 static int
 584 init_pmu(void)
 585 {
 586         int timeout;
 587         struct adb_request req;
 588
 589         /* Negate TREQ. Set TACK to input and TREQ to output. */
 590         out_8(&via2[B], in_8(&via2[B]) | TREQ);
 591         out_8(&via2[DIRB], (in_8(&via2[DIRB]) | TREQ) & ~TACK);
 592
 593         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 594         timeout =  100000;
 595         while (!req.complete) {
 596                 if (--timeout < 0) {
 597                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 598                         return 0;
 599                 }
 600                 udelay(10);
 601                 pmu_poll();
 602         }
 603
 604         /* ack all pending interrupts */
 605         timeout = 100000;
 606         interrupt_data[0][0] = 1;
 607         while (interrupt_data[0][0] || pmu_state != idle) {
 608                 if (--timeout < 0) {
 609                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 610                         return 0;
 611                 }
 612                 if (pmu_state == idle)
 613                         adb_int_pending = 1;
 614                 via_pmu_interrupt(0, NULL);
 615                 udelay(10);
 616         }
 617
 618         /* Tell PMU we are ready.  */
 619         if (pmu_kind == PMU_KEYLARGO_BASED) {
 620                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 621                 while (!req.complete)
 622                         pmu_poll();
 623         }
 624
 625         /* Read PMU version */
 626         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 627         pmu_wait_complete(&req);
 628         if (req.reply_len > 0)
 629                 pmu_version = req.reply[0];
 630
 631         /* Read server mode setting */
 632         if (pmu_kind == PMU_KEYLARGO_BASED) {
 633                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 634                             PMU_PWR_GET_POWERUP_EVENTS);
 635                 pmu_wait_complete(&req);
 636                 if (req.reply_len == 2) {
 637                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 638                                 option_server_mode = 1;
 639                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 640                                option_server_mode ? "enabled" : "disabled");
 641                 }
 642         }
 643
 644         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 645                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 646
 647         return 1;
 648 }
 649
 650 int
 651 pmu_get_model(void)
 652 {
 653         return pmu_kind;
 654 }
 655
 656 static void pmu_set_server_mode(int server_mode)
 657 {
 658         struct adb_request req;
 659
 660         if (pmu_kind != PMU_KEYLARGO_BASED)
 661                 return;
 662
 663         option_server_mode = server_mode;
 664         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 665         pmu_wait_complete(&req);
 666         if (req.reply_len < 2)
 667                 return;
 668         if (server_mode)
 669                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 670                             PMU_PWR_SET_POWERUP_EVENTS,
 671                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 672         else
 673                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 674                             PMU_PWR_CLR_POWERUP_EVENTS,
 675                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 676         pmu_wait_complete(&req);
 677 }
 678
 679 /* This new version of the code for 2400/3400/3500 powerbooks
 680  * is inspired from the implementation in gkrellm-pmu
 681  */
 682 static void
 683 done_battery_state_ohare(struct adb_request* req)
 684 {
 685 #ifdef CONFIG_PPC_PMAC
 686         /* format:
 687          *  [0]    :  flags
 688          *    0x01 :  AC indicator
 689          *    0x02 :  charging
 690          *    0x04 :  battery exist
 691          *    0x08 :
 692          *    0x10 :
 693          *    0x20 :  full charged
 694          *    0x40 :  pcharge reset
 695          *    0x80 :  battery exist
 696          *
 697          *  [1][2] :  battery voltage
 698          *  [3]    :  CPU temperature
 699          *  [4]    :  battery temperature
 700          *  [5]    :  current
 701          *  [6][7] :  pcharge
 702          *              --tkoba
 703          */
 704         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 705         long pcharge, charge, vb, vmax, lmax;
 706         long vmax_charging, vmax_charged;
 707         long amperage, voltage, time, max;
 708         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 709                         NULL, PMAC_MB_INFO_MODEL, 0);
 710
 711         if (req->reply[0] & 0x01)
 712                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 713         else
 714                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 715
 716         if (mb == PMAC_TYPE_COMET) {
 717                 vmax_charged = 189;
 718                 vmax_charging = 213;
 719                 lmax = 6500;
 720         } else {
 721                 vmax_charged = 330;
 722                 vmax_charging = 330;
 723                 lmax = 6500;
 724         }
 725         vmax = vmax_charged;
 726
 727         /* If battery installed */
 728         if (req->reply[0] & 0x04) {
 729                 bat_flags |= PMU_BATT_PRESENT;
 730                 if (req->reply[0] & 0x02)
 731                         bat_flags |= PMU_BATT_CHARGING;
 732                 vb = (req->reply[1] << 8) | req->reply[2];
 733                 voltage = (vb * 265 + 72665) / 10;
 734                 amperage = req->reply[5];
 735                 if ((req->reply[0] & 0x01) == 0) {
 736                         if (amperage > 200)
 737                                 vb += ((amperage - 200) * 15)/100;
 738                 } else if (req->reply[0] & 0x02) {
 739                         vb = (vb * 97) / 100;
 740                         vmax = vmax_charging;
 741                 }
 742                 charge = (100 * vb) / vmax;
 743                 if (req->reply[0] & 0x40) {
 744                         pcharge = (req->reply[6] << 8) + req->reply[7];
 745                         if (pcharge > lmax)
 746                                 pcharge = lmax;
 747                         pcharge *= 100;
 748                         pcharge = 100 - pcharge / lmax;
 749                         if (pcharge < charge)
 750                                 charge = pcharge;
 751                 }
 752                 if (amperage > 0)
 753                         time = (charge * 16440) / amperage;
 754                 else
 755                         time = 0;
 756                 max = 100;
 757                 amperage = -amperage;
 758         } else
 759                 charge = max = amperage = voltage = time = 0;
 760
 761         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 762         pmu_batteries[pmu_cur_battery].charge = charge;
 763         pmu_batteries[pmu_cur_battery].max_charge = max;
 764         pmu_batteries[pmu_cur_battery].amperage = amperage;
 765         pmu_batteries[pmu_cur_battery].voltage = voltage;
 766         pmu_batteries[pmu_cur_battery].time_remaining = time;
 767 #endif /* CONFIG_PPC_PMAC */
 768
 769         clear_bit(0, &async_req_locks);
 770 }
 771
 772 static void
 773 done_battery_state_smart(struct adb_request* req)
 774 {
 775         /* format:
 776          *  [0] : format of this structure (known: 3,4,5)
 777          *  [1] : flags
 778          *
 779          *  format 3 & 4:
 780          *
 781          *  [2] : charge
 782          *  [3] : max charge
 783          *  [4] : current
 784          *  [5] : voltage
 785          *
 786          *  format 5:
 787          *
 788          *  [2][3] : charge
 789          *  [4][5] : max charge
 790          *  [6][7] : current
 791          *  [8][9] : voltage
 792          */
 793
 794         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 795         int amperage;
 796         unsigned int capa, max, voltage;
 797
 798         if (req->reply[1] & 0x01)
 799                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 800         else
 801                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 802
 803
 804         capa = max = amperage = voltage = 0;
 805
 806         if (req->reply[1] & 0x04) {
 807                 bat_flags |= PMU_BATT_PRESENT;
 808                 switch(req->reply[0]) {
 809                         case 3:
 810                         case 4: capa = req->reply[2];
 811                                 max = req->reply[3];
 812                                 amperage = *((signed char *)&req->reply[4]);
 813                                 voltage = req->reply[5];
 814                                 break;
 815                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 816                                 max = (req->reply[4] << 8) | req->reply[5];
 817                                 amperage = *((signed short *)&req->reply[6]);
 818                                 voltage = (req->reply[8] << 8) | req->reply[9];
 819                                 break;
 820                         default:
 821                                 pr_warn("pmu.c: unrecognized battery info, "
 822                                         "len: %d, %4ph\n", req->reply_len,
 823                                                            req->reply);
 824                                 break;
 825                 }
 826         }
 827
 828         if ((req->reply[1] & 0x01) && (amperage > 0))
 829                 bat_flags |= PMU_BATT_CHARGING;
 830
 831         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 832         pmu_batteries[pmu_cur_battery].charge = capa;
 833         pmu_batteries[pmu_cur_battery].max_charge = max;
 834         pmu_batteries[pmu_cur_battery].amperage = amperage;
 835         pmu_batteries[pmu_cur_battery].voltage = voltage;
 836         if (amperage) {
 837                 if ((req->reply[1] & 0x01) && (amperage > 0))
 838                         pmu_batteries[pmu_cur_battery].time_remaining
 839                                 = ((max-capa) * 3600) / amperage;
 840                 else
 841                         pmu_batteries[pmu_cur_battery].time_remaining
 842                                 = (capa * 3600) / (-amperage);
 843         } else
 844                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 845
 846         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 847
 848         clear_bit(0, &async_req_locks);
 849 }
 850
 851 static void
 852 query_battery_state(void)
 853 {
 854         if (test_and_set_bit(0, &async_req_locks))
 855                 return;
 856         if (pmu_kind == PMU_OHARE_BASED)
 857                 pmu_request(&batt_req, done_battery_state_ohare,
 858                         1, PMU_BATTERY_STATE);
 859         else
 860                 pmu_request(&batt_req, done_battery_state_smart,
 861                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 862 }
 863
 864 static int pmu_info_proc_show(struct seq_file *m, void *v)
 865 {
 866         seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 867         seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
 868         seq_printf(m, "AC Power               : %d\n",
 869                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 870         seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
 871
 872         return 0;
 873 }
 874
 875 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 876 {
 877         int i;
 878         static const char *irq_names[NUM_IRQ_STATS] = {
 879                 "Unknown interrupt (type 0)",
 880                 "Unknown interrupt (type 1)",
 881                 "PC-Card eject button",
 882                 "Sound/Brightness button",
 883                 "ADB message",
 884                 "Battery state change",
 885                 "Environment interrupt",
 886                 "Tick timer",
 887                 "Ghost interrupt (zero len)",
 888                 "Empty interrupt (empty mask)",
 889                 "Max irqs in a row",
 890                 "Total CB1 triggered events",
 891                 "Total GPIO1 triggered events",
 892         };
 893
 894         for (i = 0; i < NUM_IRQ_STATS; i++) {
 895                 seq_printf(m, " %2u: %10u (%s)\n",
 896                              i, pmu_irq_stats[i], irq_names[i]);
 897         }
 898         return 0;
 899 }
 900
 901 static int pmu_battery_proc_show(struct seq_file *m, void *v)
 902 {
 903         long batnum = (long)m->private;
 904
 905         seq_putc(m, '\n');
 906         seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
 907         seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
 908         seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
 909         seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
 910         seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
 911         seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
 912         return 0;
 913 }
 914
 915 static int pmu_options_proc_show(struct seq_file *m, void *v)
 916 {
 917 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 918         if (pmu_kind == PMU_KEYLARGO_BASED &&
 919             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 920                 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 921 #endif
 922         if (pmu_kind == PMU_KEYLARGO_BASED)
 923                 seq_printf(m, "server_mode=%d\n", option_server_mode);
 924
 925         return 0;
 926 }
 927
 928 static int pmu_options_proc_open(struct inode *inode, struct file *file)
 929 {
 930         return single_open(file, pmu_options_proc_show, NULL);
 931 }
 932
 933 static ssize_t pmu_options_proc_write(struct file *file,
 934                 const char __user *buffer, size_t count, loff_t *pos)
 935 {
 936         char tmp[33];
 937         char *label, *val;
 938         size_t fcount = count;
 939
 940         if (!count)
 941                 return -EINVAL;
 942         if (count > 32)
 943                 count = 32;
 944         if (copy_from_user(tmp, buffer, count))
 945                 return -EFAULT;
 946         tmp[count] = 0;
 947
 948         label = tmp;
 949         while(*label == ' ')
 950                 label++;
 951         val = label;
 952         while(*val && (*val != '=')) {
 953                 if (*val == ' ')
 954                         *val = 0;
 955                 val++;
 956         }
 957         if ((*val) == 0)
 958                 return -EINVAL;
 959         *(val++) = 0;
 960         while(*val == ' ')
 961                 val++;
 962 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 963         if (pmu_kind == PMU_KEYLARGO_BASED &&
 964             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 965                 if (!strcmp(label, "lid_wakeup"))
 966                         option_lid_wakeup = ((*val) == '1');
 967 #endif
 968         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 969                 int new_value;
 970                 new_value = ((*val) == '1');
 971                 if (new_value != option_server_mode)
 972                         pmu_set_server_mode(new_value);
 973         }
 974         return fcount;
 975 }
 976
 977 static const struct file_operations pmu_options_proc_fops = {
 978         .owner          = THIS_MODULE,
 979         .open           = pmu_options_proc_open,
 980         .read           = seq_read,
 981         .llseek         = seq_lseek,
 982         .release        = single_release,
 983         .write          = pmu_options_proc_write,
 984 };
 985
 986 #ifdef CONFIG_ADB
 987 /* Send an ADB command */
 988 static int pmu_send_request(struct adb_request *req, int sync)
 989 {
 990         int i, ret;
 991
 992         if (pmu_state == uninitialized || !pmu_fully_inited) {
 993                 req->complete = 1;
 994                 return -ENXIO;
 995         }
 996
 997         ret = -EINVAL;
 998
 999         switch (req->data[0]) {
1000         case PMU_PACKET:
1001                 for (i = 0; i < req->nbytes - 1; ++i)
1002                         req->data[i] = req->data[i+1];
1003                 --req->nbytes;
1004                 if (pmu_data_len[req->data[0]][1] != 0) {
1005                         req->reply[0] = ADB_RET_OK;
1006                         req->reply_len = 1;
1007                 } else
1008                         req->reply_len = 0;
1009                 ret = pmu_queue_request(req);
1010                 break;
1011         case CUDA_PACKET:
1012                 switch (req->data[1]) {
1013                 case CUDA_GET_TIME:
1014                         if (req->nbytes != 2)
1015                                 break;
1016                         req->data[0] = PMU_READ_RTC;
1017                         req->nbytes = 1;
1018                         req->reply_len = 3;
1019                         req->reply[0] = CUDA_PACKET;
1020                         req->reply[1] = 0;
1021                         req->reply[2] = CUDA_GET_TIME;
1022                         ret = pmu_queue_request(req);
1023                         break;
1024                 case CUDA_SET_TIME:
1025                         if (req->nbytes != 6)
1026                                 break;
1027                         req->data[0] = PMU_SET_RTC;
1028                         req->nbytes = 5;
1029                         for (i = 1; i <= 4; ++i)
1030                                 req->data[i] = req->data[i+1];
1031                         req->reply_len = 3;
1032                         req->reply[0] = CUDA_PACKET;
1033                         req->reply[1] = 0;
1034                         req->reply[2] = CUDA_SET_TIME;
1035                         ret = pmu_queue_request(req);
1036                         break;
1037                 }
1038                 break;
1039         case ADB_PACKET:
1040                 if (!pmu_has_adb)
1041                         return -ENXIO;
1042                 for (i = req->nbytes - 1; i > 1; --i)
1043                         req->data[i+2] = req->data[i];
1044                 req->data[3] = req->nbytes - 2;
1045                 req->data[2] = pmu_adb_flags;
1046                 /*req->data[1] = req->data[1];*/
1047                 req->data[0] = PMU_ADB_CMD;
1048                 req->nbytes += 2;
1049                 req->reply_expected = 1;
1050                 req->reply_len = 0;
1051                 ret = pmu_queue_request(req);
1052                 break;
1053         }
1054         if (ret) {
1055                 req->complete = 1;
1056                 return ret;
1057         }
1058
1059         if (sync)
1060                 while (!req->complete)
1061                         pmu_poll();
1062
1063         return 0;
1064 }
1065
1066 /* Enable/disable autopolling */
1067 static int __pmu_adb_autopoll(int devs)
1068 {
1069         struct adb_request req;
1070
1071         if (devs) {
1072                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1073                             adb_dev_map >> 8, adb_dev_map);
1074                 pmu_adb_flags = 2;
1075         } else {
1076                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1077                 pmu_adb_flags = 0;
1078         }
1079         while (!req.complete)
1080                 pmu_poll();
1081         return 0;
1082 }
1083
1084 static int pmu_adb_autopoll(int devs)
1085 {
1086         if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1087                 return -ENXIO;
1088
1089         adb_dev_map = devs;
1090         return __pmu_adb_autopoll(devs);
1091 }
1092
1093 /* Reset the ADB bus */
1094 static int pmu_adb_reset_bus(void)
1095 {
1096         struct adb_request req;
1097         int save_autopoll = adb_dev_map;
1098
1099         if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1100                 return -ENXIO;
1101
1102         /* anyone got a better idea?? */
1103         __pmu_adb_autopoll(0);
1104
1105         req.nbytes = 4;
1106         req.done = NULL;
1107         req.data[0] = PMU_ADB_CMD;
1108         req.data[1] = ADB_BUSRESET;
1109         req.data[2] = 0;
1110         req.data[3] = 0;
1111         req.data[4] = 0;
1112         req.reply_len = 0;
1113         req.reply_expected = 1;
1114         if (pmu_queue_request(&req) != 0) {
1115                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1116                 return -EIO;
1117         }
1118         pmu_wait_complete(&req);
1119
1120         if (save_autopoll != 0)
1121                 __pmu_adb_autopoll(save_autopoll);
1122
1123         return 0;
1124 }
1125 #endif /* CONFIG_ADB */
1126
1127 /* Construct and send a pmu request */
1128 int
1129 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1130             int nbytes, ...)
1131 {
1132         va_list list;
1133         int i;
1134
1135         if (pmu_state == uninitialized)
1136                 return -ENXIO;
1137
1138         if (nbytes < 0 || nbytes > 32) {
1139                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1140                 req->complete = 1;
1141                 return -EINVAL;
1142         }
1143         req->nbytes = nbytes;
1144         req->done = done;
1145         va_start(list, nbytes);
1146         for (i = 0; i < nbytes; ++i)
1147                 req->data[i] = va_arg(list, int);
1148         va_end(list);
1149         req->reply_len = 0;
1150         req->reply_expected = 0;
1151         return pmu_queue_request(req);
1152 }
1153
1154 int
1155 pmu_queue_request(struct adb_request *req)
1156 {
1157         unsigned long flags;
1158         int nsend;
1159
1160         if (pmu_state == uninitialized) {
1161                 req->complete = 1;
1162                 return -ENXIO;
1163         }
1164         if (req->nbytes <= 0) {
1165                 req->complete = 1;
1166                 return 0;
1167         }
1168         nsend = pmu_data_len[req->data[0]][0];
1169         if (nsend >= 0 && req->nbytes != nsend + 1) {
1170                 req->complete = 1;
1171                 return -EINVAL;
1172         }
1173
1174         req->next = NULL;
1175         req->sent = 0;
1176         req->complete = 0;
1177
1178         spin_lock_irqsave(&pmu_lock, flags);
1179         if (current_req) {
1180                 last_req->next = req;
1181                 last_req = req;
1182         } else {
1183                 current_req = req;
1184                 last_req = req;
1185                 if (pmu_state == idle)
1186                         pmu_start();
1187         }
1188         spin_unlock_irqrestore(&pmu_lock, flags);
1189
1190         return 0;
1191 }
1192
1193 static inline void
1194 wait_for_ack(void)
1195 {
1196         /* Sightly increased the delay, I had one occurrence of the message
1197          * reported
1198          */
1199         int timeout = 4000;
1200         while ((in_8(&via2[B]) & TACK) == 0) {
1201                 if (--timeout < 0) {
1202                         printk(KERN_ERR "PMU not responding (!ack)\n");
1203                         return;
1204                 }
1205                 udelay(10);
1206         }
1207 }
1208
1209 /* New PMU seems to be very sensitive to those timings, so we make sure
1210  * PCI is flushed immediately */
1211 static inline void
1212 send_byte(int x)
1213 {
1214         out_8(&via1[ACR], in_8(&via1[ACR]) | SR_OUT | SR_EXT);
1215         out_8(&via1[SR], x);
1216         out_8(&via2[B], in_8(&via2[B]) & ~TREQ);        /* assert TREQ */
1217         (void)in_8(&via2[B]);
1218 }
1219
1220 static inline void
1221 recv_byte(void)
1222 {
1223         out_8(&via1[ACR], (in_8(&via1[ACR]) & ~SR_OUT) | SR_EXT);
1224         in_8(&via1[SR]);                /* resets SR */
1225         out_8(&via2[B], in_8(&via2[B]) & ~TREQ);
1226         (void)in_8(&via2[B]);
1227 }
1228
1229 static inline void
1230 pmu_done(struct adb_request *req)
1231 {
1232         void (*done)(struct adb_request *) = req->done;
1233         mb();
1234         req->complete = 1;
1235         /* Here, we assume that if the request has a done member, the
1236          * struct request will survive to setting req->complete to 1
1237          */
1238         if (done)
1239                 (*done)(req);
1240 }
1241
1242 static void
1243 pmu_start(void)
1244 {
1245         struct adb_request *req;
1246
1247         /* assert pmu_state == idle */
1248         /* get the packet to send */
1249         req = current_req;
1250         if (!req || pmu_state != idle
1251             || (/*req->reply_expected && */req_awaiting_reply))
1252                 return;
1253
1254         pmu_state = sending;
1255         data_index = 1;
1256         data_len = pmu_data_len[req->data[0]][0];
1257
1258         /* Sounds safer to make sure ACK is high before writing. This helped
1259          * kill a problem with ADB and some iBooks
1260          */
1261         wait_for_ack();
1262         /* set the shift register to shift out and send a byte */
1263         send_byte(req->data[0]);
1264 }
1265
1266 void
1267 pmu_poll(void)
1268 {
1269         if (pmu_state == uninitialized)
1270                 return;
1271         if (disable_poll)
1272                 return;
1273         via_pmu_interrupt(0, NULL);
1274 }
1275
1276 void
1277 pmu_poll_adb(void)
1278 {
1279         if (pmu_state == uninitialized)
1280                 return;
1281         if (disable_poll)
1282                 return;
1283         /* Kicks ADB read when PMU is suspended */
1284         adb_int_pending = 1;
1285         do {
1286                 via_pmu_interrupt(0, NULL);
1287         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1288                 || req_awaiting_reply));
1289 }
1290
1291 void
1292 pmu_wait_complete(struct adb_request *req)
1293 {
1294         if (pmu_state == uninitialized)
1295                 return;
1296         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1297                 via_pmu_interrupt(0, NULL);
1298 }
1299
1300 /* This function loops until the PMU is idle and prevents it from
1301  * anwsering to ADB interrupts. pmu_request can still be called.
1302  * This is done to avoid spurrious shutdowns when we know we'll have
1303  * interrupts switched off for a long time
1304  */
1305 void
1306 pmu_suspend(void)
1307 {
1308         unsigned long flags;
1309
1310         if (pmu_state == uninitialized)
1311                 return;
1312
1313         spin_lock_irqsave(&pmu_lock, flags);
1314         pmu_suspended++;
1315         if (pmu_suspended > 1) {
1316                 spin_unlock_irqrestore(&pmu_lock, flags);
1317                 return;
1318         }
1319
1320         do {
1321                 spin_unlock_irqrestore(&pmu_lock, flags);
1322                 if (req_awaiting_reply)
1323                         adb_int_pending = 1;
1324                 via_pmu_interrupt(0, NULL);
1325                 spin_lock_irqsave(&pmu_lock, flags);
1326                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1327                         if (gpio_irq >= 0)
1328                                 disable_irq_nosync(gpio_irq);
1329                         out_8(&via1[IER], CB1_INT | IER_CLR);
1330                         spin_unlock_irqrestore(&pmu_lock, flags);
1331                         break;
1332                 }
1333         } while (1);
1334 }
1335
1336 void
1337 pmu_resume(void)
1338 {
1339         unsigned long flags;
1340
1341         if (pmu_state == uninitialized || pmu_suspended < 1)
1342                 return;
1343
1344         spin_lock_irqsave(&pmu_lock, flags);
1345         pmu_suspended--;
1346         if (pmu_suspended > 0) {
1347                 spin_unlock_irqrestore(&pmu_lock, flags);
1348                 return;
1349         }
1350         adb_int_pending = 1;
1351         if (gpio_irq >= 0)
1352                 enable_irq(gpio_irq);
1353         out_8(&via1[IER], CB1_INT | IER_SET);
1354         spin_unlock_irqrestore(&pmu_lock, flags);
1355         pmu_poll();
1356 }
1357
1358 /* Interrupt data could be the result data from an ADB cmd */
1359 static void
1360 pmu_handle_data(unsigned char *data, int len)
1361 {
1362         unsigned char ints;
1363         int idx;
1364         int i = 0;
1365
1366         asleep = 0;
1367         if (drop_interrupts || len < 1) {
1368                 adb_int_pending = 0;
1369                 pmu_irq_stats[8]++;
1370                 return;
1371         }
1372
1373         /* Get PMU interrupt mask */
1374         ints = data[0];
1375
1376         /* Record zero interrupts for stats */
1377         if (ints == 0)
1378                 pmu_irq_stats[9]++;
1379
1380         /* Hack to deal with ADB autopoll flag */
1381         if (ints & PMU_INT_ADB)
1382                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1383
1384 next:
1385         if (ints == 0) {
1386                 if (i > pmu_irq_stats[10])
1387                         pmu_irq_stats[10] = i;
1388                 return;
1389         }
1390         i++;
1391
1392         idx = ffs(ints) - 1;
1393         ints &= ~BIT(idx);
1394
1395         pmu_irq_stats[idx]++;
1396
1397         /* Note: for some reason, we get an interrupt with len=1,
1398          * data[0]==0 after each normal ADB interrupt, at least
1399          * on the Pismo. Still investigating...  --BenH
1400          */
1401         switch (BIT(idx)) {
1402         case PMU_INT_ADB:
1403                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1404                         struct adb_request *req = req_awaiting_reply;
1405                         if (!req) {
1406                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1407                                 return;
1408                         }
1409                         req_awaiting_reply = NULL;
1410                         if (len <= 2)
1411                                 req->reply_len = 0;
1412                         else {
1413                                 memcpy(req->reply, data + 1, len - 1);
1414                                 req->reply_len = len - 1;
1415                         }
1416                         pmu_done(req);
1417                 } else {
1418 #ifdef CONFIG_XMON
1419                         if (len == 4 && data[1] == 0x2c) {
1420                                 extern int xmon_wants_key, xmon_adb_keycode;
1421                                 if (xmon_wants_key) {
1422                                         xmon_adb_keycode = data[2];
1423                                         return;
1424                                 }
1425                         }
1426 #endif /* CONFIG_XMON */
1427 #ifdef CONFIG_ADB
1428                         /*
1429                          * XXX On the [23]400 the PMU gives us an up
1430                          * event for keycodes 0x74 or 0x75 when the PC
1431                          * card eject buttons are released, so we
1432                          * ignore those events.
1433                          */
1434                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1435                               && data[1] == 0x2c && data[3] == 0xff
1436                               && (data[2] & ~1) == 0xf4))
1437                                 adb_input(data+1, len-1, 1);
1438 #endif /* CONFIG_ADB */
1439                 }
1440                 break;
1441
1442         /* Sound/brightness button pressed */
1443         case PMU_INT_SNDBRT:
1444 #ifdef CONFIG_PMAC_BACKLIGHT
1445                 if (len == 3)
1446                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1447 #endif
1448                 break;
1449
1450         /* Tick interrupt */
1451         case PMU_INT_TICK:
1452                 /* Environment or tick interrupt, query batteries */
1453                 if (pmu_battery_count) {
1454                         if ((--query_batt_timer) == 0) {
1455                                 query_battery_state();
1456                                 query_batt_timer = BATTERY_POLLING_COUNT;
1457                         }
1458                 }
1459                 break;
1460
1461         case PMU_INT_ENVIRONMENT:
1462                 if (pmu_battery_count)
1463                         query_battery_state();
1464                 pmu_pass_intr(data, len);
1465                 /* len == 6 is probably a bad check. But how do I
1466                  * know what PMU versions send what events here? */
1467                 if (len == 6) {
1468                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1469                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1470                 }
1471                 break;
1472
1473         default:
1474                pmu_pass_intr(data, len);
1475         }
1476         goto next;
1477 }
1478
1479 static struct adb_request*
1480 pmu_sr_intr(void)
1481 {
1482         struct adb_request *req;
1483         int bite = 0;
1484
1485         if (in_8(&via2[B]) & TREQ) {
1486                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via2[B]));
1487                 return NULL;
1488         }
1489         /* The ack may not yet be low when we get the interrupt */
1490         while ((in_8(&via2[B]) & TACK) != 0)
1491                         ;
1492
1493         /* if reading grab the byte, and reset the interrupt */
1494         if (pmu_state == reading || pmu_state == reading_intr)
1495                 bite = in_8(&via1[SR]);
1496
1497         /* reset TREQ and wait for TACK to go high */
1498         out_8(&via2[B], in_8(&via2[B]) | TREQ);
1499         wait_for_ack();
1500
1501         switch (pmu_state) {
1502         case sending:
1503                 req = current_req;
1504                 if (data_len < 0) {
1505                         data_len = req->nbytes - 1;
1506                         send_byte(data_len);
1507                         break;
1508                 }
1509                 if (data_index <= data_len) {
1510                         send_byte(req->data[data_index++]);
1511                         break;
1512                 }
1513                 req->sent = 1;
1514                 data_len = pmu_data_len[req->data[0]][1];
1515                 if (data_len == 0) {
1516                         pmu_state = idle;
1517                         current_req = req->next;
1518                         if (req->reply_expected)
1519                                 req_awaiting_reply = req;
1520                         else
1521                                 return req;
1522                 } else {
1523                         pmu_state = reading;
1524                         data_index = 0;
1525                         reply_ptr = req->reply + req->reply_len;
1526                         recv_byte();
1527                 }
1528                 break;
1529
1530         case intack:
1531                 data_index = 0;
1532                 data_len = -1;
1533                 pmu_state = reading_intr;
1534                 reply_ptr = interrupt_data[int_data_last];
1535                 recv_byte();
1536                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1537                         enable_irq(gpio_irq);
1538                         gpio_irq_enabled = 1;
1539                 }
1540                 break;
1541
1542         case reading:
1543         case reading_intr:
1544                 if (data_len == -1) {
1545                         data_len = bite;
1546                         if (bite > 32)
1547                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1548                 } else if (data_index < 32) {
1549                         reply_ptr[data_index++] = bite;
1550                 }
1551                 if (data_index < data_len) {
1552                         recv_byte();
1553                         break;
1554                 }
1555
1556                 if (pmu_state == reading_intr) {
1557                         pmu_state = idle;
1558                         int_data_state[int_data_last] = int_data_ready;
1559                         interrupt_data_len[int_data_last] = data_len;
1560                 } else {
1561                         req = current_req;
1562                         /*
1563                          * For PMU sleep and freq change requests, we lock the
1564                          * PMU until it's explicitly unlocked. This avoids any
1565                          * spurrious event polling getting in
1566                          */
1567                         current_req = req->next;
1568                         req->reply_len += data_index;
1569                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1570                                 pmu_state = locked;
1571                         else
1572                                 pmu_state = idle;
1573                         return req;
1574                 }
1575                 break;
1576
1577         default:
1578                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1579                        pmu_state);
1580         }
1581         return NULL;
1582 }
1583
1584 static irqreturn_t
1585 via_pmu_interrupt(int irq, void *arg)
1586 {
1587         unsigned long flags;
1588         int intr;
1589         int nloop = 0;
1590         int int_data = -1;
1591         struct adb_request *req = NULL;
1592         int handled = 0;
1593
1594         /* This is a bit brutal, we can probably do better */
1595         spin_lock_irqsave(&pmu_lock, flags);
1596         ++disable_poll;
1597
1598         for (;;) {
1599                 /* On 68k Macs, VIA interrupts are dispatched individually.
1600                  * Unless we are polling, the relevant IRQ flag has already
1601                  * been cleared.
1602                  */
1603                 intr = 0;
1604                 if (IS_ENABLED(CONFIG_PPC_PMAC) || !irq) {
1605                         intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT);
1606                         out_8(&via1[IFR], intr);
1607                 }
1608 #ifndef CONFIG_PPC_PMAC
1609                 switch (irq) {
1610                 case IRQ_MAC_ADB_CL:
1611                         intr = CB1_INT;
1612                         break;
1613                 case IRQ_MAC_ADB_SR:
1614                         intr = SR_INT;
1615                         break;
1616                 }
1617 #endif
1618                 if (intr == 0)
1619                         break;
1620                 handled = 1;
1621                 if (++nloop > 1000) {
1622                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1623                                "intr=%x, ier=%x pmu_state=%d\n",
1624                                intr, in_8(&via1[IER]), pmu_state);
1625                         break;
1626                 }
1627                 if (intr & CB1_INT) {
1628                         adb_int_pending = 1;
1629                         pmu_irq_stats[11]++;
1630                 }
1631                 if (intr & SR_INT) {
1632                         req = pmu_sr_intr();
1633                         if (req)
1634                                 break;
1635                 }
1636 #ifndef CONFIG_PPC_PMAC
1637                 break;
1638 #endif
1639         }
1640
1641 recheck:
1642         if (pmu_state == idle) {
1643                 if (adb_int_pending) {
1644                         if (int_data_state[0] == int_data_empty)
1645                                 int_data_last = 0;
1646                         else if (int_data_state[1] == int_data_empty)
1647                                 int_data_last = 1;
1648                         else
1649                                 goto no_free_slot;
1650                         pmu_state = intack;
1651                         int_data_state[int_data_last] = int_data_fill;
1652                         /* Sounds safer to make sure ACK is high before writing.
1653                          * This helped kill a problem with ADB and some iBooks
1654                          */
1655                         wait_for_ack();
1656                         send_byte(PMU_INT_ACK);
1657                         adb_int_pending = 0;
1658                 } else if (current_req)
1659                         pmu_start();
1660         }
1661 no_free_slot:
1662         /* Mark the oldest buffer for flushing */
1663         if (int_data_state[!int_data_last] == int_data_ready) {
1664                 int_data_state[!int_data_last] = int_data_flush;
1665                 int_data = !int_data_last;
1666         } else if (int_data_state[int_data_last] == int_data_ready) {
1667                 int_data_state[int_data_last] = int_data_flush;
1668                 int_data = int_data_last;
1669         }
1670         --disable_poll;
1671         spin_unlock_irqrestore(&pmu_lock, flags);
1672
1673         /* Deal with completed PMU requests outside of the lock */
1674         if (req) {
1675                 pmu_done(req);
1676                 req = NULL;
1677         }
1678
1679         /* Deal with interrupt datas outside of the lock */
1680         if (int_data >= 0) {
1681                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1682                 spin_lock_irqsave(&pmu_lock, flags);
1683                 ++disable_poll;
1684                 int_data_state[int_data] = int_data_empty;
1685                 int_data = -1;
1686                 goto recheck;
1687         }
1688
1689         return IRQ_RETVAL(handled);
1690 }
1691
1692 void
1693 pmu_unlock(void)
1694 {
1695         unsigned long flags;
1696
1697         spin_lock_irqsave(&pmu_lock, flags);
1698         if (pmu_state == locked)
1699                 pmu_state = idle;
1700         adb_int_pending = 1;
1701         spin_unlock_irqrestore(&pmu_lock, flags);
1702 }
1703
1704
1705 static __maybe_unused irqreturn_t
1706 gpio1_interrupt(int irq, void *arg)
1707 {
1708         unsigned long flags;
1709
1710         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1711                 spin_lock_irqsave(&pmu_lock, flags);
1712                 if (gpio_irq_enabled > 0) {
1713                         disable_irq_nosync(gpio_irq);
1714                         gpio_irq_enabled = 0;
1715                 }
1716                 pmu_irq_stats[12]++;
1717                 adb_int_pending = 1;
1718                 spin_unlock_irqrestore(&pmu_lock, flags);
1719                 via_pmu_interrupt(0, NULL);
1720                 return IRQ_HANDLED;
1721         }
1722         return IRQ_NONE;
1723 }
1724
1725 void
1726 pmu_enable_irled(int on)
1727 {
1728         struct adb_request req;
1729
1730         if (pmu_state == uninitialized)
1731                 return ;
1732         if (pmu_kind == PMU_KEYLARGO_BASED)
1733                 return ;
1734
1735         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1736             (on ? PMU_POW_ON : PMU_POW_OFF));
1737         pmu_wait_complete(&req);
1738 }
1739
1740 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
1741 #define RTC_OFFSET      2082844800
1742
1743 time64_t pmu_get_time(void)
1744 {
1745         struct adb_request req;
1746         u32 now;
1747
1748         if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
1749                 return 0;
1750         pmu_wait_complete(&req);
1751         if (req.reply_len != 4)
1752                 pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1753         now = (req.reply[0] << 24) + (req.reply[1] << 16) +
1754               (req.reply[2] << 8) + req.reply[3];
1755         return (time64_t)now - RTC_OFFSET;
1756 }
1757
1758 int pmu_set_rtc_time(struct rtc_time *tm)
1759 {
1760         u32 now;
1761         struct adb_request req;
1762
1763         now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET);
1764         if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
1765                         now >> 24, now >> 16, now >> 8, now) < 0)
1766                 return -ENXIO;
1767         pmu_wait_complete(&req);
1768         if (req.reply_len != 0)
1769                 pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1770         return 0;
1771 }
1772
1773 void
1774 pmu_restart(void)
1775 {
1776         struct adb_request req;
1777
1778         if (pmu_state == uninitialized)
1779                 return;
1780
1781         local_irq_disable();
1782
1783         drop_interrupts = 1;
1784
1785         if (pmu_kind != PMU_KEYLARGO_BASED) {
1786                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1787                                                 PMU_INT_TICK );
1788                 while(!req.complete)
1789                         pmu_poll();
1790         }
1791
1792         pmu_request(&req, NULL, 1, PMU_RESET);
1793         pmu_wait_complete(&req);
1794         for (;;)
1795                 ;
1796 }
1797
1798 void
1799 pmu_shutdown(void)
1800 {
1801         struct adb_request req;
1802
1803         if (pmu_state == uninitialized)
1804                 return;
1805
1806         local_irq_disable();
1807
1808         drop_interrupts = 1;
1809
1810         if (pmu_kind != PMU_KEYLARGO_BASED) {
1811                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1812                                                 PMU_INT_TICK );
1813                 pmu_wait_complete(&req);
1814         } else {
1815                 /* Disable server mode on shutdown or we'll just
1816                  * wake up again
1817                  */
1818                 pmu_set_server_mode(0);
1819         }
1820
1821         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1822                     'M', 'A', 'T', 'T');
1823         pmu_wait_complete(&req);
1824         for (;;)
1825                 ;
1826 }
1827
1828 int
1829 pmu_present(void)
1830 {
1831         return pmu_state != uninitialized;
1832 }
1833
1834 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1835 /*
1836  * Put the powerbook to sleep.
1837  */
1838
1839 static u32 save_via[8];
1840
1841 static void
1842 save_via_state(void)
1843 {
1844         save_via[0] = in_8(&via1[ANH]);
1845         save_via[1] = in_8(&via1[DIRA]);
1846         save_via[2] = in_8(&via1[B]);
1847         save_via[3] = in_8(&via1[DIRB]);
1848         save_via[4] = in_8(&via1[PCR]);
1849         save_via[5] = in_8(&via1[ACR]);
1850         save_via[6] = in_8(&via1[T1CL]);
1851         save_via[7] = in_8(&via1[T1CH]);
1852 }
1853 static void
1854 restore_via_state(void)
1855 {
1856         out_8(&via1[ANH],  save_via[0]);
1857         out_8(&via1[DIRA], save_via[1]);
1858         out_8(&via1[B],    save_via[2]);
1859         out_8(&via1[DIRB], save_via[3]);
1860         out_8(&via1[PCR],  save_via[4]);
1861         out_8(&via1[ACR],  save_via[5]);
1862         out_8(&via1[T1CL], save_via[6]);
1863         out_8(&via1[T1CH], save_via[7]);
1864         out_8(&via1[IER], IER_CLR | 0x7f);      /* disable all intrs */
1865         out_8(&via1[IFR], 0x7f);                        /* clear IFR */
1866         out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
1867 }
1868
1869 #define GRACKLE_PM      (1<<7)
1870 #define GRACKLE_DOZE    (1<<5)
1871 #define GRACKLE_NAP     (1<<4)
1872 #define GRACKLE_SLEEP   (1<<3)
1873
1874 static int powerbook_sleep_grackle(void)
1875 {
1876         unsigned long save_l2cr;
1877         unsigned short pmcr1;
1878         struct adb_request req;
1879         struct pci_dev *grackle;
1880
1881         grackle = pci_get_domain_bus_and_slot(0, 0, 0);
1882         if (!grackle)
1883                 return -ENODEV;
1884
1885         /* Turn off various things. Darwin does some retry tests here... */
1886         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1887         pmu_wait_complete(&req);
1888         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1889                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1890         pmu_wait_complete(&req);
1891
1892         /* For 750, save backside cache setting and disable it */
1893         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1894
1895         if (!__fake_sleep) {
1896                 /* Ask the PMU to put us to sleep */
1897                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1898                 pmu_wait_complete(&req);
1899         }
1900
1901         /* The VIA is supposed not to be restored correctly*/
1902         save_via_state();
1903         /* We shut down some HW */
1904         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1905
1906         pci_read_config_word(grackle, 0x70, &pmcr1);
1907         /* Apparently, MacOS uses NAP mode for Grackle ??? */
1908         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1909         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1910         pci_write_config_word(grackle, 0x70, pmcr1);
1911
1912         /* Call low-level ASM sleep handler */
1913         if (__fake_sleep)
1914                 mdelay(5000);
1915         else
1916                 low_sleep_handler();
1917
1918         /* We're awake again, stop grackle PM */
1919         pci_read_config_word(grackle, 0x70, &pmcr1);
1920         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1921         pci_write_config_word(grackle, 0x70, pmcr1);
1922
1923         pci_dev_put(grackle);
1924
1925         /* Make sure the PMU is idle */
1926         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1927         restore_via_state();
1928
1929         /* Restore L2 cache */
1930         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1931                 _set_L2CR(save_l2cr);
1932
1933         /* Restore userland MMU context */
1934         switch_mmu_context(NULL, current->active_mm, NULL);
1935
1936         /* Power things up */
1937         pmu_unlock();
1938         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1939         pmu_wait_complete(&req);
1940         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1941                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1942         pmu_wait_complete(&req);
1943         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1944                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1945         pmu_wait_complete(&req);
1946
1947         return 0;
1948 }
1949
1950 static int
1951 powerbook_sleep_Core99(void)
1952 {
1953         unsigned long save_l2cr;
1954         unsigned long save_l3cr;
1955         struct adb_request req;
1956
1957         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1958                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1959                 return -ENOSYS;
1960         }
1961
1962         if (num_online_cpus() > 1 || cpu_is_offline(0))
1963                 return -EAGAIN;
1964
1965         /* Stop environment and ADB interrupts */
1966         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1967         pmu_wait_complete(&req);
1968
1969         /* Tell PMU what events will wake us up */
1970         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1971                 0xff, 0xff);
1972         pmu_wait_complete(&req);
1973         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1974                 0, PMU_PWR_WAKEUP_KEY |
1975                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1976         pmu_wait_complete(&req);
1977
1978         /* Save the state of the L2 and L3 caches */
1979         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
1980         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1981
1982         if (!__fake_sleep) {
1983                 /* Ask the PMU to put us to sleep */
1984                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1985                 pmu_wait_complete(&req);
1986         }
1987
1988         /* The VIA is supposed not to be restored correctly*/
1989         save_via_state();
1990
1991         /* Shut down various ASICs. There's a chance that we can no longer
1992          * talk to the PMU after this, so I moved it to _after_ sending the
1993          * sleep command to it. Still need to be checked.
1994          */
1995         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1996
1997         /* Call low-level ASM sleep handler */
1998         if (__fake_sleep)
1999                 mdelay(5000);
2000         else
2001                 low_sleep_handler();
2002
2003         /* Restore Apple core ASICs state */
2004         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2005
2006         /* Restore VIA */
2007         restore_via_state();
2008
2009         /* tweak LPJ before cpufreq is there */
2010         loops_per_jiffy *= 2;
2011
2012         /* Restore video */
2013         pmac_call_early_video_resume();
2014
2015         /* Restore L2 cache */
2016         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2017                 _set_L2CR(save_l2cr);
2018         /* Restore L3 cache */
2019         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2020                 _set_L3CR(save_l3cr);
2021
2022         /* Restore userland MMU context */
2023         switch_mmu_context(NULL, current->active_mm, NULL);
2024
2025         /* Tell PMU we are ready */
2026         pmu_unlock();
2027         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2028         pmu_wait_complete(&req);
2029         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2030         pmu_wait_complete(&req);
2031
2032         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2033         loops_per_jiffy /= 2;
2034
2035         return 0;
2036 }
2037
2038 #define PB3400_MEM_CTRL         0xf8000000
2039 #define PB3400_MEM_CTRL_SLEEP   0x70
2040
2041 static void __iomem *pb3400_mem_ctrl;
2042
2043 static void powerbook_sleep_init_3400(void)
2044 {
2045         /* map in the memory controller registers */
2046         pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2047         if (pb3400_mem_ctrl == NULL)
2048                 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
2049 }
2050
2051 static int powerbook_sleep_3400(void)
2052 {
2053         int i, x;
2054         unsigned int hid0;
2055         unsigned long msr;
2056         struct adb_request sleep_req;
2057         unsigned int __iomem *mem_ctrl_sleep;
2058
2059         if (pb3400_mem_ctrl == NULL)
2060                 return -ENOMEM;
2061         mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2062
2063         /* Set the memory controller to keep the memory refreshed
2064            while we're asleep */
2065         for (i = 0x403f; i >= 0x4000; --i) {
2066                 out_be32(mem_ctrl_sleep, i);
2067                 do {
2068                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2069                 } while (x == 0);
2070                 if (x >= 0x100)
2071                         break;
2072         }
2073
2074         /* Ask the PMU to put us to sleep */
2075         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2076         pmu_wait_complete(&sleep_req);
2077         pmu_unlock();
2078
2079         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2080
2081         asleep = 1;
2082
2083         /* Put the CPU into sleep mode */
2084         hid0 = mfspr(SPRN_HID0);
2085         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2086         mtspr(SPRN_HID0, hid0);
2087         local_irq_enable();
2088         msr = mfmsr() | MSR_POW;
2089         while (asleep) {
2090                 mb();
2091                 mtmsr(msr);
2092                 isync();
2093         }
2094         local_irq_disable();
2095
2096         /* OK, we're awake again, start restoring things */
2097         out_be32(mem_ctrl_sleep, 0x3f);
2098         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2099
2100         return 0;
2101 }
2102
2103 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2104
2105 /*
2106  * Support for /dev/pmu device
2107  */
2108 #define RB_SIZE         0x10
2109 struct pmu_private {
2110         struct list_head list;
2111         int     rb_get;
2112         int     rb_put;
2113         struct rb_entry {
2114                 unsigned short len;
2115                 unsigned char data[16];
2116         }       rb_buf[RB_SIZE];
2117         wait_queue_head_t wait;
2118         spinlock_t lock;
2119 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2120         int     backlight_locker;
2121 #endif
2122 };
2123
2124 static LIST_HEAD(all_pmu_pvt);
2125 static DEFINE_SPINLOCK(all_pvt_lock);
2126
2127 static void
2128 pmu_pass_intr(unsigned char *data, int len)
2129 {
2130         struct pmu_private *pp;
2131         struct list_head *list;
2132         int i;
2133         unsigned long flags;
2134
2135         if (len > sizeof(pp->rb_buf[0].data))
2136                 len = sizeof(pp->rb_buf[0].data);
2137         spin_lock_irqsave(&all_pvt_lock, flags);
2138         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2139                 pp = list_entry(list, struct pmu_private, list);
2140                 spin_lock(&pp->lock);
2141                 i = pp->rb_put + 1;
2142                 if (i >= RB_SIZE)
2143                         i = 0;
2144                 if (i != pp->rb_get) {
2145                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2146                         rp->len = len;
2147                         memcpy(rp->data, data, len);
2148                         pp->rb_put = i;
2149                         wake_up_interruptible(&pp->wait);
2150                 }
2151                 spin_unlock(&pp->lock);
2152         }
2153         spin_unlock_irqrestore(&all_pvt_lock, flags);
2154 }
2155
2156 static int
2157 pmu_open(struct inode *inode, struct file *file)
2158 {
2159         struct pmu_private *pp;
2160         unsigned long flags;
2161
2162         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2163         if (!pp)
2164                 return -ENOMEM;
2165         pp->rb_get = pp->rb_put = 0;
2166         spin_lock_init(&pp->lock);
2167         init_waitqueue_head(&pp->wait);
2168         mutex_lock(&pmu_info_proc_mutex);
2169         spin_lock_irqsave(&all_pvt_lock, flags);
2170 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2171         pp->backlight_locker = 0;
2172 #endif
2173         list_add(&pp->list, &all_pmu_pvt);
2174         spin_unlock_irqrestore(&all_pvt_lock, flags);
2175         file->private_data = pp;
2176         mutex_unlock(&pmu_info_proc_mutex);
2177         return 0;
2178 }
2179
2180 static ssize_t
2181 pmu_read(struct file *file, char __user *buf,
2182                         size_t count, loff_t *ppos)
2183 {
2184         struct pmu_private *pp = file->private_data;
2185         DECLARE_WAITQUEUE(wait, current);
2186         unsigned long flags;
2187         int ret = 0;
2188
2189         if (count < 1 || !pp)
2190                 return -EINVAL;
2191         if (!access_ok(VERIFY_WRITE, buf, count))
2192                 return -EFAULT;
2193
2194         spin_lock_irqsave(&pp->lock, flags);
2195         add_wait_queue(&pp->wait, &wait);
2196         set_current_state(TASK_INTERRUPTIBLE);
2197
2198         for (;;) {
2199                 ret = -EAGAIN;
2200                 if (pp->rb_get != pp->rb_put) {
2201                         int i = pp->rb_get;
2202                         struct rb_entry *rp = &pp->rb_buf[i];
2203                         ret = rp->len;
2204                         spin_unlock_irqrestore(&pp->lock, flags);
2205                         if (ret > count)
2206                                 ret = count;
2207                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2208                                 ret = -EFAULT;
2209                         if (++i >= RB_SIZE)
2210                                 i = 0;
2211                         spin_lock_irqsave(&pp->lock, flags);
2212                         pp->rb_get = i;
2213                 }
2214                 if (ret >= 0)
2215                         break;
2216                 if (file->f_flags & O_NONBLOCK)
2217                         break;
2218                 ret = -ERESTARTSYS;
2219                 if (signal_pending(current))
2220                         break;
2221                 spin_unlock_irqrestore(&pp->lock, flags);
2222                 schedule();
2223                 spin_lock_irqsave(&pp->lock, flags);
2224         }
2225         __set_current_state(TASK_RUNNING);
2226         remove_wait_queue(&pp->wait, &wait);
2227         spin_unlock_irqrestore(&pp->lock, flags);
2228
2229         return ret;
2230 }
2231
2232 static ssize_t
2233 pmu_write(struct file *file, const char __user *buf,
2234                          size_t count, loff_t *ppos)
2235 {
2236         return 0;
2237 }
2238
2239 static __poll_t
2240 pmu_fpoll(struct file *filp, poll_table *wait)
2241 {
2242         struct pmu_private *pp = filp->private_data;
2243         __poll_t mask = 0;
2244         unsigned long flags;
2245
2246         if (!pp)
2247                 return 0;
2248         poll_wait(filp, &pp->wait, wait);
2249         spin_lock_irqsave(&pp->lock, flags);
2250         if (pp->rb_get != pp->rb_put)
2251                 mask |= EPOLLIN;
2252         spin_unlock_irqrestore(&pp->lock, flags);
2253         return mask;
2254 }
2255
2256 static int
2257 pmu_release(struct inode *inode, struct file *file)
2258 {
2259         struct pmu_private *pp = file->private_data;
2260         unsigned long flags;
2261
2262         if (pp) {
2263                 file->private_data = NULL;
2264                 spin_lock_irqsave(&all_pvt_lock, flags);
2265                 list_del(&pp->list);
2266                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2267
2268 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2269                 if (pp->backlight_locker)
2270                         pmac_backlight_enable();
2271 #endif
2272
2273                 kfree(pp);
2274         }
2275         return 0;
2276 }
2277
2278 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2279 static void pmac_suspend_disable_irqs(void)
2280 {
2281         /* Call platform functions marked "on sleep" */
2282         pmac_pfunc_i2c_suspend();
2283         pmac_pfunc_base_suspend();
2284 }
2285
2286 static int powerbook_sleep(suspend_state_t state)
2287 {
2288         int error = 0;
2289
2290         /* Wait for completion of async requests */
2291         while (!batt_req.complete)
2292                 pmu_poll();
2293
2294         /* Giveup the lazy FPU & vec so we don't have to back them
2295          * up from the low level code
2296          */
2297         enable_kernel_fp();
2298
2299 #ifdef CONFIG_ALTIVEC
2300         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2301                 enable_kernel_altivec();
2302 #endif /* CONFIG_ALTIVEC */
2303
2304         switch (pmu_kind) {
2305         case PMU_OHARE_BASED:
2306                 error = powerbook_sleep_3400();
2307                 break;
2308         case PMU_HEATHROW_BASED:
2309         case PMU_PADDINGTON_BASED:
2310                 error = powerbook_sleep_grackle();
2311                 break;
2312         case PMU_KEYLARGO_BASED:
2313                 error = powerbook_sleep_Core99();
2314                 break;
2315         default:
2316                 return -ENOSYS;
2317         }
2318
2319         if (error)
2320                 return error;
2321
2322         mdelay(100);
2323
2324         return 0;
2325 }
2326
2327 static void pmac_suspend_enable_irqs(void)
2328 {
2329         /* Force a poll of ADB interrupts */
2330         adb_int_pending = 1;
2331         via_pmu_interrupt(0, NULL);
2332
2333         mdelay(10);
2334
2335         /* Call platform functions marked "on wake" */
2336         pmac_pfunc_base_resume();
2337         pmac_pfunc_i2c_resume();
2338 }
2339
2340 static int pmu_sleep_valid(suspend_state_t state)
2341 {
2342         return state == PM_SUSPEND_MEM
2343                 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2344 }
2345
2346 static const struct platform_suspend_ops pmu_pm_ops = {
2347         .enter = powerbook_sleep,
2348         .valid = pmu_sleep_valid,
2349 };
2350
2351 static int register_pmu_pm_ops(void)
2352 {
2353         if (pmu_kind == PMU_OHARE_BASED)
2354                 powerbook_sleep_init_3400();
2355         ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2356         ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2357         suspend_set_ops(&pmu_pm_ops);
2358
2359         return 0;
2360 }
2361
2362 device_initcall(register_pmu_pm_ops);
2363 #endif
2364
2365 static int pmu_ioctl(struct file *filp,
2366                      u_int cmd, u_long arg)
2367 {
2368         __u32 __user *argp = (__u32 __user *)arg;
2369         int error = -EINVAL;
2370
2371         switch (cmd) {
2372 #ifdef CONFIG_PPC_PMAC
2373         case PMU_IOC_SLEEP:
2374                 if (!capable(CAP_SYS_ADMIN))
2375                         return -EACCES;
2376                 return pm_suspend(PM_SUSPEND_MEM);
2377         case PMU_IOC_CAN_SLEEP:
2378                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2379                         return put_user(0, argp);
2380                 else
2381                         return put_user(1, argp);
2382 #endif
2383
2384 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2385         /* Compatibility ioctl's for backlight */
2386         case PMU_IOC_GET_BACKLIGHT:
2387         {
2388                 int brightness;
2389
2390                 brightness = pmac_backlight_get_legacy_brightness();
2391                 if (brightness < 0)
2392                         return brightness;
2393                 else
2394                         return put_user(brightness, argp);
2395
2396         }
2397         case PMU_IOC_SET_BACKLIGHT:
2398         {
2399                 int brightness;
2400
2401                 error = get_user(brightness, argp);
2402                 if (error)
2403                         return error;
2404
2405                 return pmac_backlight_set_legacy_brightness(brightness);
2406         }
2407 #ifdef CONFIG_INPUT_ADBHID
2408         case PMU_IOC_GRAB_BACKLIGHT: {
2409                 struct pmu_private *pp = filp->private_data;
2410
2411                 if (pp->backlight_locker)
2412                         return 0;
2413
2414                 pp->backlight_locker = 1;
2415                 pmac_backlight_disable();
2416
2417                 return 0;
2418         }
2419 #endif /* CONFIG_INPUT_ADBHID */
2420 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2421
2422         case PMU_IOC_GET_MODEL:
2423                 return put_user(pmu_kind, argp);
2424         case PMU_IOC_HAS_ADB:
2425                 return put_user(pmu_has_adb, argp);
2426         }
2427         return error;
2428 }
2429
2430 static long pmu_unlocked_ioctl(struct file *filp,
2431                                u_int cmd, u_long arg)
2432 {
2433         int ret;
2434
2435         mutex_lock(&pmu_info_proc_mutex);
2436         ret = pmu_ioctl(filp, cmd, arg);
2437         mutex_unlock(&pmu_info_proc_mutex);
2438
2439         return ret;
2440 }
2441
2442 #ifdef CONFIG_COMPAT
2443 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2444 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2445 #define PMU_IOC_GET_MODEL32     _IOR('B', 3, compat_size_t)
2446 #define PMU_IOC_HAS_ADB32       _IOR('B', 4, compat_size_t)
2447 #define PMU_IOC_CAN_SLEEP32     _IOR('B', 5, compat_size_t)
2448 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2449
2450 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2451 {
2452         switch (cmd) {
2453         case PMU_IOC_SLEEP:
2454                 break;
2455         case PMU_IOC_GET_BACKLIGHT32:
2456                 cmd = PMU_IOC_GET_BACKLIGHT;
2457                 break;
2458         case PMU_IOC_SET_BACKLIGHT32:
2459                 cmd = PMU_IOC_SET_BACKLIGHT;
2460                 break;
2461         case PMU_IOC_GET_MODEL32:
2462                 cmd = PMU_IOC_GET_MODEL;
2463                 break;
2464         case PMU_IOC_HAS_ADB32:
2465                 cmd = PMU_IOC_HAS_ADB;
2466                 break;
2467         case PMU_IOC_CAN_SLEEP32:
2468                 cmd = PMU_IOC_CAN_SLEEP;
2469                 break;
2470         case PMU_IOC_GRAB_BACKLIGHT32:
2471                 cmd = PMU_IOC_GRAB_BACKLIGHT;
2472                 break;
2473         default:
2474                 return -ENOIOCTLCMD;
2475         }
2476         return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2477 }
2478 #endif
2479
2480 static const struct file_operations pmu_device_fops = {
2481         .read           = pmu_read,
2482         .write          = pmu_write,
2483         .poll           = pmu_fpoll,
2484         .unlocked_ioctl = pmu_unlocked_ioctl,
2485 #ifdef CONFIG_COMPAT
2486         .compat_ioctl   = compat_pmu_ioctl,
2487 #endif
2488         .open           = pmu_open,
2489         .release        = pmu_release,
2490         .llseek         = noop_llseek,
2491 };
2492
2493 static struct miscdevice pmu_device = {
2494         PMU_MINOR, "pmu", &pmu_device_fops
2495 };
2496
2497 static int pmu_device_init(void)
2498 {
2499         if (pmu_state == uninitialized)
2500                 return 0;
2501         if (misc_register(&pmu_device) < 0)
2502                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2503         return 0;
2504 }
2505 device_initcall(pmu_device_init);
2506
2507
2508 #ifdef DEBUG_SLEEP
2509 static inline void
2510 polled_handshake(void)
2511 {
2512         via2[B] &= ~TREQ; eieio();
2513         while ((via2[B] & TACK) != 0)
2514                 ;
2515         via2[B] |= TREQ; eieio();
2516         while ((via2[B] & TACK) == 0)
2517                 ;
2518 }
2519
2520 static inline void
2521 polled_send_byte(int x)
2522 {
2523         via1[ACR] |= SR_OUT | SR_EXT; eieio();
2524         via1[SR] = x; eieio();
2525         polled_handshake();
2526 }
2527
2528 static inline int
2529 polled_recv_byte(void)
2530 {
2531         int x;
2532
2533         via1[ACR] = (via1[ACR] & ~SR_OUT) | SR_EXT; eieio();
2534         x = via1[SR]; eieio();
2535         polled_handshake();
2536         x = via1[SR]; eieio();
2537         return x;
2538 }
2539
2540 int
2541 pmu_polled_request(struct adb_request *req)
2542 {
2543         unsigned long flags;
2544         int i, l, c;
2545
2546         req->complete = 1;
2547         c = req->data[0];
2548         l = pmu_data_len[c][0];
2549         if (l >= 0 && req->nbytes != l + 1)
2550                 return -EINVAL;
2551
2552         local_irq_save(flags);
2553         while (pmu_state != idle)
2554                 pmu_poll();
2555
2556         while ((via2[B] & TACK) == 0)
2557                 ;
2558         polled_send_byte(c);
2559         if (l < 0) {
2560                 l = req->nbytes - 1;
2561                 polled_send_byte(l);
2562         }
2563         for (i = 1; i <= l; ++i)
2564                 polled_send_byte(req->data[i]);
2565
2566         l = pmu_data_len[c][1];
2567         if (l < 0)
2568                 l = polled_recv_byte();
2569         for (i = 0; i < l; ++i)
2570                 req->reply[i + req->reply_len] = polled_recv_byte();
2571
2572         if (req->done)
2573                 (*req->done)(req);
2574
2575         local_irq_restore(flags);
2576         return 0;
2577 }
2578
2579 /* N.B. This doesn't work on the 3400 */
2580 void pmu_blink(int n)
2581 {
2582         struct adb_request req;
2583
2584         memset(&req, 0, sizeof(req));
2585
2586         for (; n > 0; --n) {
2587                 req.nbytes = 4;
2588                 req.done = NULL;
2589                 req.data[0] = 0xee;
2590                 req.data[1] = 4;
2591                 req.data[2] = 0;
2592                 req.data[3] = 1;
2593                 req.reply[0] = ADB_RET_OK;
2594                 req.reply_len = 1;
2595                 req.reply_expected = 0;
2596                 pmu_polled_request(&req);
2597                 mdelay(50);
2598                 req.nbytes = 4;
2599                 req.done = NULL;
2600                 req.data[0] = 0xee;
2601                 req.data[1] = 4;
2602                 req.data[2] = 0;
2603                 req.data[3] = 0;
2604                 req.reply[0] = ADB_RET_OK;
2605                 req.reply_len = 1;
2606                 req.reply_expected = 0;
2607                 pmu_polled_request(&req);
2608                 mdelay(50);
2609         }
2610         mdelay(50);
2611 }
2612 #endif /* DEBUG_SLEEP */
2613
2614 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2615 int pmu_sys_suspended;
2616
2617 static int pmu_syscore_suspend(void)
2618 {
2619         /* Suspend PMU event interrupts */
2620         pmu_suspend();
2621         pmu_sys_suspended = 1;
2622
2623 #ifdef CONFIG_PMAC_BACKLIGHT
2624         /* Tell backlight code not to muck around with the chip anymore */
2625         pmu_backlight_set_sleep(1);
2626 #endif
2627
2628         return 0;
2629 }
2630
2631 static void pmu_syscore_resume(void)
2632 {
2633         struct adb_request req;
2634
2635         if (!pmu_sys_suspended)
2636                 return;
2637
2638         /* Tell PMU we are ready */
2639         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2640         pmu_wait_complete(&req);
2641
2642 #ifdef CONFIG_PMAC_BACKLIGHT
2643         /* Tell backlight code it can use the chip again */
2644         pmu_backlight_set_sleep(0);
2645 #endif
2646         /* Resume PMU event interrupts */
2647         pmu_resume();
2648         pmu_sys_suspended = 0;
2649 }
2650
2651 static struct syscore_ops pmu_syscore_ops = {
2652         .suspend = pmu_syscore_suspend,
2653         .resume = pmu_syscore_resume,
2654 };
2655
2656 static int pmu_syscore_register(void)
2657 {
2658         register_syscore_ops(&pmu_syscore_ops);
2659
2660         return 0;
2661 }
2662 subsys_initcall(pmu_syscore_register);
2663 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2664
2665 EXPORT_SYMBOL(pmu_request);
2666 EXPORT_SYMBOL(pmu_queue_request);
2667 EXPORT_SYMBOL(pmu_poll);
2668 EXPORT_SYMBOL(pmu_poll_adb);
2669 EXPORT_SYMBOL(pmu_wait_complete);
2670 EXPORT_SYMBOL(pmu_suspend);
2671 EXPORT_SYMBOL(pmu_resume);
2672 EXPORT_SYMBOL(pmu_unlock);
2673 #if defined(CONFIG_PPC32)
2674 EXPORT_SYMBOL(pmu_enable_irled);
2675 EXPORT_SYMBOL(pmu_battery_count);
2676 EXPORT_SYMBOL(pmu_batteries);
2677 EXPORT_SYMBOL(pmu_power_flags);
2678 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2679