drivers/macintosh/via-pmu.c

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