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         /* Negate TREQ. Set TACK to input and TREQ to output. */
 536         out_8(&via[B], in_8(&via[B]) | TREQ);
 537         out_8(&via[DIRB], (in_8(&via[DIRB]) | TREQ) & ~TACK);
 538
 539         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 540         timeout =  100000;
 541         while (!req.complete) {
 542                 if (--timeout < 0) {
 543                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 544                         return 0;
 545                 }
 546                 udelay(10);
 547                 pmu_poll();
 548         }
 549
 550         /* ack all pending interrupts */
 551         timeout = 100000;
 552         interrupt_data[0][0] = 1;
 553         while (interrupt_data[0][0] || pmu_state != idle) {
 554                 if (--timeout < 0) {
 555                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 556                         return 0;
 557                 }
 558                 if (pmu_state == idle)
 559                         adb_int_pending = 1;
 560                 via_pmu_interrupt(0, NULL);
 561                 udelay(10);
 562         }
 563
 564         /* Tell PMU we are ready.  */
 565         if (pmu_kind == PMU_KEYLARGO_BASED) {
 566                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 567                 while (!req.complete)
 568                         pmu_poll();
 569         }
 570
 571         /* Read PMU version */
 572         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 573         pmu_wait_complete(&req);
 574         if (req.reply_len > 0)
 575                 pmu_version = req.reply[0];
 576
 577         /* Read server mode setting */
 578         if (pmu_kind == PMU_KEYLARGO_BASED) {
 579                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 580                             PMU_PWR_GET_POWERUP_EVENTS);
 581                 pmu_wait_complete(&req);
 582                 if (req.reply_len == 2) {
 583                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 584                                 option_server_mode = 1;
 585                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 586                                option_server_mode ? "enabled" : "disabled");
 587                 }
 588         }
 589         return 1;
 590 }
 591
 592 int
 593 pmu_get_model(void)
 594 {
 595         return pmu_kind;
 596 }
 597
 598 static void pmu_set_server_mode(int server_mode)
 599 {
 600         struct adb_request req;
 601
 602         if (pmu_kind != PMU_KEYLARGO_BASED)
 603                 return;
 604
 605         option_server_mode = server_mode;
 606         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 607         pmu_wait_complete(&req);
 608         if (req.reply_len < 2)
 609                 return;
 610         if (server_mode)
 611                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 612                             PMU_PWR_SET_POWERUP_EVENTS,
 613                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 614         else
 615                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 616                             PMU_PWR_CLR_POWERUP_EVENTS,
 617                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 618         pmu_wait_complete(&req);
 619 }
 620
 621 /* This new version of the code for 2400/3400/3500 powerbooks
 622  * is inspired from the implementation in gkrellm-pmu
 623  */
 624 static void
 625 done_battery_state_ohare(struct adb_request* req)
 626 {
 627         /* format:
 628          *  [0]    :  flags
 629          *    0x01 :  AC indicator
 630          *    0x02 :  charging
 631          *    0x04 :  battery exist
 632          *    0x08 :
 633          *    0x10 :
 634          *    0x20 :  full charged
 635          *    0x40 :  pcharge reset
 636          *    0x80 :  battery exist
 637          *
 638          *  [1][2] :  battery voltage
 639          *  [3]    :  CPU temperature
 640          *  [4]    :  battery temperature
 641          *  [5]    :  current
 642          *  [6][7] :  pcharge
 643          *              --tkoba
 644          */
 645         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 646         long pcharge, charge, vb, vmax, lmax;
 647         long vmax_charging, vmax_charged;
 648         long amperage, voltage, time, max;
 649         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 650                         NULL, PMAC_MB_INFO_MODEL, 0);
 651
 652         if (req->reply[0] & 0x01)
 653                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 654         else
 655                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 656
 657         if (mb == PMAC_TYPE_COMET) {
 658                 vmax_charged = 189;
 659                 vmax_charging = 213;
 660                 lmax = 6500;
 661         } else {
 662                 vmax_charged = 330;
 663                 vmax_charging = 330;
 664                 lmax = 6500;
 665         }
 666         vmax = vmax_charged;
 667
 668         /* If battery installed */
 669         if (req->reply[0] & 0x04) {
 670                 bat_flags |= PMU_BATT_PRESENT;
 671                 if (req->reply[0] & 0x02)
 672                         bat_flags |= PMU_BATT_CHARGING;
 673                 vb = (req->reply[1] << 8) | req->reply[2];
 674                 voltage = (vb * 265 + 72665) / 10;
 675                 amperage = req->reply[5];
 676                 if ((req->reply[0] & 0x01) == 0) {
 677                         if (amperage > 200)
 678                                 vb += ((amperage - 200) * 15)/100;
 679                 } else if (req->reply[0] & 0x02) {
 680                         vb = (vb * 97) / 100;
 681                         vmax = vmax_charging;
 682                 }
 683                 charge = (100 * vb) / vmax;
 684                 if (req->reply[0] & 0x40) {
 685                         pcharge = (req->reply[6] << 8) + req->reply[7];
 686                         if (pcharge > lmax)
 687                                 pcharge = lmax;
 688                         pcharge *= 100;
 689                         pcharge = 100 - pcharge / lmax;
 690                         if (pcharge < charge)
 691                                 charge = pcharge;
 692                 }
 693                 if (amperage > 0)
 694                         time = (charge * 16440) / amperage;
 695                 else
 696                         time = 0;
 697                 max = 100;
 698                 amperage = -amperage;
 699         } else
 700                 charge = max = amperage = voltage = time = 0;
 701
 702         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 703         pmu_batteries[pmu_cur_battery].charge = charge;
 704         pmu_batteries[pmu_cur_battery].max_charge = max;
 705         pmu_batteries[pmu_cur_battery].amperage = amperage;
 706         pmu_batteries[pmu_cur_battery].voltage = voltage;
 707         pmu_batteries[pmu_cur_battery].time_remaining = time;
 708
 709         clear_bit(0, &async_req_locks);
 710 }
 711
 712 static void
 713 done_battery_state_smart(struct adb_request* req)
 714 {
 715         /* format:
 716          *  [0] : format of this structure (known: 3,4,5)
 717          *  [1] : flags
 718          *
 719          *  format 3 & 4:
 720          *
 721          *  [2] : charge
 722          *  [3] : max charge
 723          *  [4] : current
 724          *  [5] : voltage
 725          *
 726          *  format 5:
 727          *
 728          *  [2][3] : charge
 729          *  [4][5] : max charge
 730          *  [6][7] : current
 731          *  [8][9] : voltage
 732          */
 733
 734         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 735         int amperage;
 736         unsigned int capa, max, voltage;
 737
 738         if (req->reply[1] & 0x01)
 739                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 740         else
 741                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 742
 743
 744         capa = max = amperage = voltage = 0;
 745
 746         if (req->reply[1] & 0x04) {
 747                 bat_flags |= PMU_BATT_PRESENT;
 748                 switch(req->reply[0]) {
 749                         case 3:
 750                         case 4: capa = req->reply[2];
 751                                 max = req->reply[3];
 752                                 amperage = *((signed char *)&req->reply[4]);
 753                                 voltage = req->reply[5];
 754                                 break;
 755                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 756                                 max = (req->reply[4] << 8) | req->reply[5];
 757                                 amperage = *((signed short *)&req->reply[6]);
 758                                 voltage = (req->reply[8] << 8) | req->reply[9];
 759                                 break;
 760                         default:
 761                                 pr_warn("pmu.c: unrecognized battery info, "
 762                                         "len: %d, %4ph\n", req->reply_len,
 763                                                            req->reply);
 764                                 break;
 765                 }
 766         }
 767
 768         if ((req->reply[1] & 0x01) && (amperage > 0))
 769                 bat_flags |= PMU_BATT_CHARGING;
 770
 771         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 772         pmu_batteries[pmu_cur_battery].charge = capa;
 773         pmu_batteries[pmu_cur_battery].max_charge = max;
 774         pmu_batteries[pmu_cur_battery].amperage = amperage;
 775         pmu_batteries[pmu_cur_battery].voltage = voltage;
 776         if (amperage) {
 777                 if ((req->reply[1] & 0x01) && (amperage > 0))
 778                         pmu_batteries[pmu_cur_battery].time_remaining
 779                                 = ((max-capa) * 3600) / amperage;
 780                 else
 781                         pmu_batteries[pmu_cur_battery].time_remaining
 782                                 = (capa * 3600) / (-amperage);
 783         } else
 784                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 785
 786         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 787
 788         clear_bit(0, &async_req_locks);
 789 }
 790
 791 static void
 792 query_battery_state(void)
 793 {
 794         if (test_and_set_bit(0, &async_req_locks))
 795                 return;
 796         if (pmu_kind == PMU_OHARE_BASED)
 797                 pmu_request(&batt_req, done_battery_state_ohare,
 798                         1, PMU_BATTERY_STATE);
 799         else
 800                 pmu_request(&batt_req, done_battery_state_smart,
 801                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 802 }
 803
 804 static int pmu_info_proc_show(struct seq_file *m, void *v)
 805 {
 806         seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 807         seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
 808         seq_printf(m, "AC Power               : %d\n",
 809                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 810         seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
 811
 812         return 0;
 813 }
 814
 815 static int pmu_info_proc_open(struct inode *inode, struct file *file)
 816 {
 817         return single_open(file, pmu_info_proc_show, NULL);
 818 }
 819
 820 static const struct file_operations pmu_info_proc_fops = {
 821         .owner          = THIS_MODULE,
 822         .open           = pmu_info_proc_open,
 823         .read           = seq_read,
 824         .llseek         = seq_lseek,
 825         .release        = single_release,
 826 };
 827
 828 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 829 {
 830         int i;
 831         static const char *irq_names[] = {
 832                 "Total CB1 triggered events",
 833                 "Total GPIO1 triggered events",
 834                 "PC-Card eject button",
 835                 "Sound/Brightness button",
 836                 "ADB message",
 837                 "Battery state change",
 838                 "Environment interrupt",
 839                 "Tick timer",
 840                 "Ghost interrupt (zero len)",
 841                 "Empty interrupt (empty mask)",
 842                 "Max irqs in a row"
 843         };
 844
 845         for (i=0; i<11; i++) {
 846                 seq_printf(m, " %2u: %10u (%s)\n",
 847                              i, pmu_irq_stats[i], irq_names[i]);
 848         }
 849         return 0;
 850 }
 851
 852 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
 853 {
 854         return single_open(file, pmu_irqstats_proc_show, NULL);
 855 }
 856
 857 static const struct file_operations pmu_irqstats_proc_fops = {
 858         .owner          = THIS_MODULE,
 859         .open           = pmu_irqstats_proc_open,
 860         .read           = seq_read,
 861         .llseek         = seq_lseek,
 862         .release        = single_release,
 863 };
 864
 865 static int pmu_battery_proc_show(struct seq_file *m, void *v)
 866 {
 867         long batnum = (long)m->private;
 868
 869         seq_putc(m, '\n');
 870         seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
 871         seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
 872         seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
 873         seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
 874         seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
 875         seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
 876         return 0;
 877 }
 878
 879 static int pmu_battery_proc_open(struct inode *inode, struct file *file)
 880 {
 881         return single_open(file, pmu_battery_proc_show, PDE_DATA(inode));
 882 }
 883
 884 static const struct file_operations pmu_battery_proc_fops = {
 885         .owner          = THIS_MODULE,
 886         .open           = pmu_battery_proc_open,
 887         .read           = seq_read,
 888         .llseek         = seq_lseek,
 889         .release        = single_release,
 890 };
 891
 892 static int pmu_options_proc_show(struct seq_file *m, void *v)
 893 {
 894 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 895         if (pmu_kind == PMU_KEYLARGO_BASED &&
 896             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 897                 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 898 #endif
 899         if (pmu_kind == PMU_KEYLARGO_BASED)
 900                 seq_printf(m, "server_mode=%d\n", option_server_mode);
 901
 902         return 0;
 903 }
 904
 905 static int pmu_options_proc_open(struct inode *inode, struct file *file)
 906 {
 907         return single_open(file, pmu_options_proc_show, NULL);
 908 }
 909
 910 static ssize_t pmu_options_proc_write(struct file *file,
 911                 const char __user *buffer, size_t count, loff_t *pos)
 912 {
 913         char tmp[33];
 914         char *label, *val;
 915         size_t fcount = count;
 916
 917         if (!count)
 918                 return -EINVAL;
 919         if (count > 32)
 920                 count = 32;
 921         if (copy_from_user(tmp, buffer, count))
 922                 return -EFAULT;
 923         tmp[count] = 0;
 924
 925         label = tmp;
 926         while(*label == ' ')
 927                 label++;
 928         val = label;
 929         while(*val && (*val != '=')) {
 930                 if (*val == ' ')
 931                         *val = 0;
 932                 val++;
 933         }
 934         if ((*val) == 0)
 935                 return -EINVAL;
 936         *(val++) = 0;
 937         while(*val == ' ')
 938                 val++;
 939 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 940         if (pmu_kind == PMU_KEYLARGO_BASED &&
 941             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 942                 if (!strcmp(label, "lid_wakeup"))
 943                         option_lid_wakeup = ((*val) == '1');
 944 #endif
 945         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 946                 int new_value;
 947                 new_value = ((*val) == '1');
 948                 if (new_value != option_server_mode)
 949                         pmu_set_server_mode(new_value);
 950         }
 951         return fcount;
 952 }
 953
 954 static const struct file_operations pmu_options_proc_fops = {
 955         .owner          = THIS_MODULE,
 956         .open           = pmu_options_proc_open,
 957         .read           = seq_read,
 958         .llseek         = seq_lseek,
 959         .release        = single_release,
 960         .write          = pmu_options_proc_write,
 961 };
 962
 963 #ifdef CONFIG_ADB
 964 /* Send an ADB command */
 965 static int pmu_send_request(struct adb_request *req, int sync)
 966 {
 967         int i, ret;
 968
 969         if ((vias == NULL) || (!pmu_fully_inited)) {
 970                 req->complete = 1;
 971                 return -ENXIO;
 972         }
 973
 974         ret = -EINVAL;
 975
 976         switch (req->data[0]) {
 977         case PMU_PACKET:
 978                 for (i = 0; i < req->nbytes - 1; ++i)
 979                         req->data[i] = req->data[i+1];
 980                 --req->nbytes;
 981                 if (pmu_data_len[req->data[0]][1] != 0) {
 982                         req->reply[0] = ADB_RET_OK;
 983                         req->reply_len = 1;
 984                 } else
 985                         req->reply_len = 0;
 986                 ret = pmu_queue_request(req);
 987                 break;
 988         case CUDA_PACKET:
 989                 switch (req->data[1]) {
 990                 case CUDA_GET_TIME:
 991                         if (req->nbytes != 2)
 992                                 break;
 993                         req->data[0] = PMU_READ_RTC;
 994                         req->nbytes = 1;
 995                         req->reply_len = 3;
 996                         req->reply[0] = CUDA_PACKET;
 997                         req->reply[1] = 0;
 998                         req->reply[2] = CUDA_GET_TIME;
 999                         ret = pmu_queue_request(req);
1000                         break;
1001                 case CUDA_SET_TIME:
1002                         if (req->nbytes != 6)
1003                                 break;
1004                         req->data[0] = PMU_SET_RTC;
1005                         req->nbytes = 5;
1006                         for (i = 1; i <= 4; ++i)
1007                                 req->data[i] = req->data[i+1];
1008                         req->reply_len = 3;
1009                         req->reply[0] = CUDA_PACKET;
1010                         req->reply[1] = 0;
1011                         req->reply[2] = CUDA_SET_TIME;
1012                         ret = pmu_queue_request(req);
1013                         break;
1014                 }
1015                 break;
1016         case ADB_PACKET:
1017                 if (!pmu_has_adb)
1018                         return -ENXIO;
1019                 for (i = req->nbytes - 1; i > 1; --i)
1020                         req->data[i+2] = req->data[i];
1021                 req->data[3] = req->nbytes - 2;
1022                 req->data[2] = pmu_adb_flags;
1023                 /*req->data[1] = req->data[1];*/
1024                 req->data[0] = PMU_ADB_CMD;
1025                 req->nbytes += 2;
1026                 req->reply_expected = 1;
1027                 req->reply_len = 0;
1028                 ret = pmu_queue_request(req);
1029                 break;
1030         }
1031         if (ret) {
1032                 req->complete = 1;
1033                 return ret;
1034         }
1035
1036         if (sync)
1037                 while (!req->complete)
1038                         pmu_poll();
1039
1040         return 0;
1041 }
1042
1043 /* Enable/disable autopolling */
1044 static int __pmu_adb_autopoll(int devs)
1045 {
1046         struct adb_request req;
1047
1048         if (devs) {
1049                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1050                             adb_dev_map >> 8, adb_dev_map);
1051                 pmu_adb_flags = 2;
1052         } else {
1053                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1054                 pmu_adb_flags = 0;
1055         }
1056         while (!req.complete)
1057                 pmu_poll();
1058         return 0;
1059 }
1060
1061 static int pmu_adb_autopoll(int devs)
1062 {
1063         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1064                 return -ENXIO;
1065
1066         adb_dev_map = devs;
1067         return __pmu_adb_autopoll(devs);
1068 }
1069
1070 /* Reset the ADB bus */
1071 static int pmu_adb_reset_bus(void)
1072 {
1073         struct adb_request req;
1074         int save_autopoll = adb_dev_map;
1075
1076         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1077                 return -ENXIO;
1078
1079         /* anyone got a better idea?? */
1080         __pmu_adb_autopoll(0);
1081
1082         req.nbytes = 4;
1083         req.done = NULL;
1084         req.data[0] = PMU_ADB_CMD;
1085         req.data[1] = ADB_BUSRESET;
1086         req.data[2] = 0;
1087         req.data[3] = 0;
1088         req.data[4] = 0;
1089         req.reply_len = 0;
1090         req.reply_expected = 1;
1091         if (pmu_queue_request(&req) != 0) {
1092                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1093                 return -EIO;
1094         }
1095         pmu_wait_complete(&req);
1096
1097         if (save_autopoll != 0)
1098                 __pmu_adb_autopoll(save_autopoll);
1099
1100         return 0;
1101 }
1102 #endif /* CONFIG_ADB */
1103
1104 /* Construct and send a pmu request */
1105 int
1106 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1107             int nbytes, ...)
1108 {
1109         va_list list;
1110         int i;
1111
1112         if (vias == NULL)
1113                 return -ENXIO;
1114
1115         if (nbytes < 0 || nbytes > 32) {
1116                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1117                 req->complete = 1;
1118                 return -EINVAL;
1119         }
1120         req->nbytes = nbytes;
1121         req->done = done;
1122         va_start(list, nbytes);
1123         for (i = 0; i < nbytes; ++i)
1124                 req->data[i] = va_arg(list, int);
1125         va_end(list);
1126         req->reply_len = 0;
1127         req->reply_expected = 0;
1128         return pmu_queue_request(req);
1129 }
1130
1131 int
1132 pmu_queue_request(struct adb_request *req)
1133 {
1134         unsigned long flags;
1135         int nsend;
1136
1137         if (via == NULL) {
1138                 req->complete = 1;
1139                 return -ENXIO;
1140         }
1141         if (req->nbytes <= 0) {
1142                 req->complete = 1;
1143                 return 0;
1144         }
1145         nsend = pmu_data_len[req->data[0]][0];
1146         if (nsend >= 0 && req->nbytes != nsend + 1) {
1147                 req->complete = 1;
1148                 return -EINVAL;
1149         }
1150
1151         req->next = NULL;
1152         req->sent = 0;
1153         req->complete = 0;
1154
1155         spin_lock_irqsave(&pmu_lock, flags);
1156         if (current_req != 0) {
1157                 last_req->next = req;
1158                 last_req = req;
1159         } else {
1160                 current_req = req;
1161                 last_req = req;
1162                 if (pmu_state == idle)
1163                         pmu_start();
1164         }
1165         spin_unlock_irqrestore(&pmu_lock, flags);
1166
1167         return 0;
1168 }
1169
1170 static inline void
1171 wait_for_ack(void)
1172 {
1173         /* Sightly increased the delay, I had one occurrence of the message
1174          * reported
1175          */
1176         int timeout = 4000;
1177         while ((in_8(&via[B]) & TACK) == 0) {
1178                 if (--timeout < 0) {
1179                         printk(KERN_ERR "PMU not responding (!ack)\n");
1180                         return;
1181                 }
1182                 udelay(10);
1183         }
1184 }
1185
1186 /* New PMU seems to be very sensitive to those timings, so we make sure
1187  * PCI is flushed immediately */
1188 static inline void
1189 send_byte(int x)
1190 {
1191         volatile unsigned char __iomem *v = via;
1192
1193         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1194         out_8(&v[SR], x);
1195         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1196         (void)in_8(&v[B]);
1197 }
1198
1199 static inline void
1200 recv_byte(void)
1201 {
1202         volatile unsigned char __iomem *v = via;
1203
1204         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1205         in_8(&v[SR]);           /* resets SR */
1206         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1207         (void)in_8(&v[B]);
1208 }
1209
1210 static inline void
1211 pmu_done(struct adb_request *req)
1212 {
1213         void (*done)(struct adb_request *) = req->done;
1214         mb();
1215         req->complete = 1;
1216         /* Here, we assume that if the request has a done member, the
1217          * struct request will survive to setting req->complete to 1
1218          */
1219         if (done)
1220                 (*done)(req);
1221 }
1222
1223 static void
1224 pmu_start(void)
1225 {
1226         struct adb_request *req;
1227
1228         /* assert pmu_state == idle */
1229         /* get the packet to send */
1230         req = current_req;
1231         if (req == 0 || pmu_state != idle
1232             || (/*req->reply_expected && */req_awaiting_reply))
1233                 return;
1234
1235         pmu_state = sending;
1236         data_index = 1;
1237         data_len = pmu_data_len[req->data[0]][0];
1238
1239         /* Sounds safer to make sure ACK is high before writing. This helped
1240          * kill a problem with ADB and some iBooks
1241          */
1242         wait_for_ack();
1243         /* set the shift register to shift out and send a byte */
1244         send_byte(req->data[0]);
1245 }
1246
1247 void
1248 pmu_poll(void)
1249 {
1250         if (!via)
1251                 return;
1252         if (disable_poll)
1253                 return;
1254         via_pmu_interrupt(0, NULL);
1255 }
1256
1257 void
1258 pmu_poll_adb(void)
1259 {
1260         if (!via)
1261                 return;
1262         if (disable_poll)
1263                 return;
1264         /* Kicks ADB read when PMU is suspended */
1265         adb_int_pending = 1;
1266         do {
1267                 via_pmu_interrupt(0, NULL);
1268         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1269                 || req_awaiting_reply));
1270 }
1271
1272 void
1273 pmu_wait_complete(struct adb_request *req)
1274 {
1275         if (!via)
1276                 return;
1277         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1278                 via_pmu_interrupt(0, NULL);
1279 }
1280
1281 /* This function loops until the PMU is idle and prevents it from
1282  * anwsering to ADB interrupts. pmu_request can still be called.
1283  * This is done to avoid spurrious shutdowns when we know we'll have
1284  * interrupts switched off for a long time
1285  */
1286 void
1287 pmu_suspend(void)
1288 {
1289         unsigned long flags;
1290
1291         if (!via)
1292                 return;
1293
1294         spin_lock_irqsave(&pmu_lock, flags);
1295         pmu_suspended++;
1296         if (pmu_suspended > 1) {
1297                 spin_unlock_irqrestore(&pmu_lock, flags);
1298                 return;
1299         }
1300
1301         do {
1302                 spin_unlock_irqrestore(&pmu_lock, flags);
1303                 if (req_awaiting_reply)
1304                         adb_int_pending = 1;
1305                 via_pmu_interrupt(0, NULL);
1306                 spin_lock_irqsave(&pmu_lock, flags);
1307                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1308                         if (gpio_irq >= 0)
1309                                 disable_irq_nosync(gpio_irq);
1310                         out_8(&via[IER], CB1_INT | IER_CLR);
1311                         spin_unlock_irqrestore(&pmu_lock, flags);
1312                         break;
1313                 }
1314         } while (1);
1315 }
1316
1317 void
1318 pmu_resume(void)
1319 {
1320         unsigned long flags;
1321
1322         if (!via || (pmu_suspended < 1))
1323                 return;
1324
1325         spin_lock_irqsave(&pmu_lock, flags);
1326         pmu_suspended--;
1327         if (pmu_suspended > 0) {
1328                 spin_unlock_irqrestore(&pmu_lock, flags);
1329                 return;
1330         }
1331         adb_int_pending = 1;
1332         if (gpio_irq >= 0)
1333                 enable_irq(gpio_irq);
1334         out_8(&via[IER], CB1_INT | IER_SET);
1335         spin_unlock_irqrestore(&pmu_lock, flags);
1336         pmu_poll();
1337 }
1338
1339 /* Interrupt data could be the result data from an ADB cmd */
1340 static void
1341 pmu_handle_data(unsigned char *data, int len)
1342 {
1343         unsigned char ints, pirq;
1344         int i = 0;
1345
1346         asleep = 0;
1347         if (drop_interrupts || len < 1) {
1348                 adb_int_pending = 0;
1349                 pmu_irq_stats[8]++;
1350                 return;
1351         }
1352
1353         /* Get PMU interrupt mask */
1354         ints = data[0];
1355
1356         /* Record zero interrupts for stats */
1357         if (ints == 0)
1358                 pmu_irq_stats[9]++;
1359
1360         /* Hack to deal with ADB autopoll flag */
1361         if (ints & PMU_INT_ADB)
1362                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1363
1364 next:
1365
1366         if (ints == 0) {
1367                 if (i > pmu_irq_stats[10])
1368                         pmu_irq_stats[10] = i;
1369                 return;
1370         }
1371
1372         for (pirq = 0; pirq < 8; pirq++)
1373                 if (ints & (1 << pirq))
1374                         break;
1375         pmu_irq_stats[pirq]++;
1376         i++;
1377         ints &= ~(1 << pirq);
1378
1379         /* Note: for some reason, we get an interrupt with len=1,
1380          * data[0]==0 after each normal ADB interrupt, at least
1381          * on the Pismo. Still investigating...  --BenH
1382          */
1383         if ((1 << pirq) & PMU_INT_ADB) {
1384                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1385                         struct adb_request *req = req_awaiting_reply;
1386                         if (req == 0) {
1387                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1388                                 return;
1389                         }
1390                         req_awaiting_reply = NULL;
1391                         if (len <= 2)
1392                                 req->reply_len = 0;
1393                         else {
1394                                 memcpy(req->reply, data + 1, len - 1);
1395                                 req->reply_len = len - 1;
1396                         }
1397                         pmu_done(req);
1398                 } else {
1399                         if (len == 4 && data[1] == 0x2c) {
1400                                 extern int xmon_wants_key, xmon_adb_keycode;
1401                                 if (xmon_wants_key) {
1402                                         xmon_adb_keycode = data[2];
1403                                         return;
1404                                 }
1405                         }
1406 #ifdef CONFIG_ADB
1407                         /*
1408                          * XXX On the [23]400 the PMU gives us an up
1409                          * event for keycodes 0x74 or 0x75 when the PC
1410                          * card eject buttons are released, so we
1411                          * ignore those events.
1412                          */
1413                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1414                               && data[1] == 0x2c && data[3] == 0xff
1415                               && (data[2] & ~1) == 0xf4))
1416                                 adb_input(data+1, len-1, 1);
1417 #endif /* CONFIG_ADB */
1418                 }
1419         }
1420         /* Sound/brightness button pressed */
1421         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1422 #ifdef CONFIG_PMAC_BACKLIGHT
1423                 if (len == 3)
1424                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1425 #endif
1426         }
1427         /* Tick interrupt */
1428         else if ((1 << pirq) & PMU_INT_TICK) {
1429                 /* Environement or tick interrupt, query batteries */
1430                 if (pmu_battery_count) {
1431                         if ((--query_batt_timer) == 0) {
1432                                 query_battery_state();
1433                                 query_batt_timer = BATTERY_POLLING_COUNT;
1434                         }
1435                 }
1436         }
1437         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1438                 if (pmu_battery_count)
1439                         query_battery_state();
1440                 pmu_pass_intr(data, len);
1441                 /* len == 6 is probably a bad check. But how do I
1442                  * know what PMU versions send what events here? */
1443                 if (IS_ENABLED(CONFIG_ADB_PMU_EVENT) && len == 6) {
1444                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1445                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1446                 }
1447         } else {
1448                pmu_pass_intr(data, len);
1449         }
1450         goto next;
1451 }
1452
1453 static struct adb_request*
1454 pmu_sr_intr(void)
1455 {
1456         struct adb_request *req;
1457         int bite = 0;
1458
1459         if (in_8(&via[B]) & TREQ) {
1460                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via[B]));
1461                 out_8(&via[IFR], SR_INT);
1462                 return NULL;
1463         }
1464         /* The ack may not yet be low when we get the interrupt */
1465         while ((in_8(&via[B]) & TACK) != 0)
1466                         ;
1467
1468         /* if reading grab the byte, and reset the interrupt */
1469         if (pmu_state == reading || pmu_state == reading_intr)
1470                 bite = in_8(&via[SR]);
1471
1472         /* reset TREQ and wait for TACK to go high */
1473         out_8(&via[B], in_8(&via[B]) | TREQ);
1474         wait_for_ack();
1475
1476         switch (pmu_state) {
1477         case sending:
1478                 req = current_req;
1479                 if (data_len < 0) {
1480                         data_len = req->nbytes - 1;
1481                         send_byte(data_len);
1482                         break;
1483                 }
1484                 if (data_index <= data_len) {
1485                         send_byte(req->data[data_index++]);
1486                         break;
1487                 }
1488                 req->sent = 1;
1489                 data_len = pmu_data_len[req->data[0]][1];
1490                 if (data_len == 0) {
1491                         pmu_state = idle;
1492                         current_req = req->next;
1493                         if (req->reply_expected)
1494                                 req_awaiting_reply = req;
1495                         else
1496                                 return req;
1497                 } else {
1498                         pmu_state = reading;
1499                         data_index = 0;
1500                         reply_ptr = req->reply + req->reply_len;
1501                         recv_byte();
1502                 }
1503                 break;
1504
1505         case intack:
1506                 data_index = 0;
1507                 data_len = -1;
1508                 pmu_state = reading_intr;
1509                 reply_ptr = interrupt_data[int_data_last];
1510                 recv_byte();
1511                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1512                         enable_irq(gpio_irq);
1513                         gpio_irq_enabled = 1;
1514                 }
1515                 break;
1516
1517         case reading:
1518         case reading_intr:
1519                 if (data_len == -1) {
1520                         data_len = bite;
1521                         if (bite > 32)
1522                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1523                 } else if (data_index < 32) {
1524                         reply_ptr[data_index++] = bite;
1525                 }
1526                 if (data_index < data_len) {
1527                         recv_byte();
1528                         break;
1529                 }
1530
1531                 if (pmu_state == reading_intr) {
1532                         pmu_state = idle;
1533                         int_data_state[int_data_last] = int_data_ready;
1534                         interrupt_data_len[int_data_last] = data_len;
1535                 } else {
1536                         req = current_req;
1537                         /*
1538                          * For PMU sleep and freq change requests, we lock the
1539                          * PMU until it's explicitly unlocked. This avoids any
1540                          * spurrious event polling getting in
1541                          */
1542                         current_req = req->next;
1543                         req->reply_len += data_index;
1544                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1545                                 pmu_state = locked;
1546                         else
1547                                 pmu_state = idle;
1548                         return req;
1549                 }
1550                 break;
1551
1552         default:
1553                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1554                        pmu_state);
1555         }
1556         return NULL;
1557 }
1558
1559 static irqreturn_t
1560 via_pmu_interrupt(int irq, void *arg)
1561 {
1562         unsigned long flags;
1563         int intr;
1564         int nloop = 0;
1565         int int_data = -1;
1566         struct adb_request *req = NULL;
1567         int handled = 0;
1568
1569         /* This is a bit brutal, we can probably do better */
1570         spin_lock_irqsave(&pmu_lock, flags);
1571         ++disable_poll;
1572
1573         for (;;) {
1574                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1575                 if (intr == 0)
1576                         break;
1577                 handled = 1;
1578                 if (++nloop > 1000) {
1579                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1580                                "intr=%x, ier=%x pmu_state=%d\n",
1581                                intr, in_8(&via[IER]), pmu_state);
1582                         break;
1583                 }
1584                 out_8(&via[IFR], intr);
1585                 if (intr & CB1_INT) {
1586                         adb_int_pending = 1;
1587                         pmu_irq_stats[0]++;
1588                 }
1589                 if (intr & SR_INT) {
1590                         req = pmu_sr_intr();
1591                         if (req)
1592                                 break;
1593                 }
1594         }
1595
1596 recheck:
1597         if (pmu_state == idle) {
1598                 if (adb_int_pending) {
1599                         if (int_data_state[0] == int_data_empty)
1600                                 int_data_last = 0;
1601                         else if (int_data_state[1] == int_data_empty)
1602                                 int_data_last = 1;
1603                         else
1604                                 goto no_free_slot;
1605                         pmu_state = intack;
1606                         int_data_state[int_data_last] = int_data_fill;
1607                         /* Sounds safer to make sure ACK is high before writing.
1608                          * This helped kill a problem with ADB and some iBooks
1609                          */
1610                         wait_for_ack();
1611                         send_byte(PMU_INT_ACK);
1612                         adb_int_pending = 0;
1613                 } else if (current_req)
1614                         pmu_start();
1615         }
1616 no_free_slot:
1617         /* Mark the oldest buffer for flushing */
1618         if (int_data_state[!int_data_last] == int_data_ready) {
1619                 int_data_state[!int_data_last] = int_data_flush;
1620                 int_data = !int_data_last;
1621         } else if (int_data_state[int_data_last] == int_data_ready) {
1622                 int_data_state[int_data_last] = int_data_flush;
1623                 int_data = int_data_last;
1624         }
1625         --disable_poll;
1626         spin_unlock_irqrestore(&pmu_lock, flags);
1627
1628         /* Deal with completed PMU requests outside of the lock */
1629         if (req) {
1630                 pmu_done(req);
1631                 req = NULL;
1632         }
1633
1634         /* Deal with interrupt datas outside of the lock */
1635         if (int_data >= 0) {
1636                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1637                 spin_lock_irqsave(&pmu_lock, flags);
1638                 ++disable_poll;
1639                 int_data_state[int_data] = int_data_empty;
1640                 int_data = -1;
1641                 goto recheck;
1642         }
1643
1644         return IRQ_RETVAL(handled);
1645 }
1646
1647 void
1648 pmu_unlock(void)
1649 {
1650         unsigned long flags;
1651
1652         spin_lock_irqsave(&pmu_lock, flags);
1653         if (pmu_state == locked)
1654                 pmu_state = idle;
1655         adb_int_pending = 1;
1656         spin_unlock_irqrestore(&pmu_lock, flags);
1657 }
1658
1659
1660 static irqreturn_t
1661 gpio1_interrupt(int irq, void *arg)
1662 {
1663         unsigned long flags;
1664
1665         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1666                 spin_lock_irqsave(&pmu_lock, flags);
1667                 if (gpio_irq_enabled > 0) {
1668                         disable_irq_nosync(gpio_irq);
1669                         gpio_irq_enabled = 0;
1670                 }
1671                 pmu_irq_stats[1]++;
1672                 adb_int_pending = 1;
1673                 spin_unlock_irqrestore(&pmu_lock, flags);
1674                 via_pmu_interrupt(0, NULL);
1675                 return IRQ_HANDLED;
1676         }
1677         return IRQ_NONE;
1678 }
1679
1680 void
1681 pmu_enable_irled(int on)
1682 {
1683         struct adb_request req;
1684
1685         if (vias == NULL)
1686                 return ;
1687         if (pmu_kind == PMU_KEYLARGO_BASED)
1688                 return ;
1689
1690         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1691             (on ? PMU_POW_ON : PMU_POW_OFF));
1692         pmu_wait_complete(&req);
1693 }
1694
1695 void
1696 pmu_restart(void)
1697 {
1698         struct adb_request req;
1699
1700         if (via == NULL)
1701                 return;
1702
1703         local_irq_disable();
1704
1705         drop_interrupts = 1;
1706
1707         if (pmu_kind != PMU_KEYLARGO_BASED) {
1708                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1709                                                 PMU_INT_TICK );
1710                 while(!req.complete)
1711                         pmu_poll();
1712         }
1713
1714         pmu_request(&req, NULL, 1, PMU_RESET);
1715         pmu_wait_complete(&req);
1716         for (;;)
1717                 ;
1718 }
1719
1720 void
1721 pmu_shutdown(void)
1722 {
1723         struct adb_request req;
1724
1725         if (via == NULL)
1726                 return;
1727
1728         local_irq_disable();
1729
1730         drop_interrupts = 1;
1731
1732         if (pmu_kind != PMU_KEYLARGO_BASED) {
1733                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1734                                                 PMU_INT_TICK );
1735                 pmu_wait_complete(&req);
1736         } else {
1737                 /* Disable server mode on shutdown or we'll just
1738                  * wake up again
1739                  */
1740                 pmu_set_server_mode(0);
1741         }
1742
1743         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1744                     'M', 'A', 'T', 'T');
1745         pmu_wait_complete(&req);
1746         for (;;)
1747                 ;
1748 }
1749
1750 int
1751 pmu_present(void)
1752 {
1753         return via != 0;
1754 }
1755
1756 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1757 /*
1758  * Put the powerbook to sleep.
1759  */
1760
1761 static u32 save_via[8];
1762
1763 static void
1764 save_via_state(void)
1765 {
1766         save_via[0] = in_8(&via[ANH]);
1767         save_via[1] = in_8(&via[DIRA]);
1768         save_via[2] = in_8(&via[B]);
1769         save_via[3] = in_8(&via[DIRB]);
1770         save_via[4] = in_8(&via[PCR]);
1771         save_via[5] = in_8(&via[ACR]);
1772         save_via[6] = in_8(&via[T1CL]);
1773         save_via[7] = in_8(&via[T1CH]);
1774 }
1775 static void
1776 restore_via_state(void)
1777 {
1778         out_8(&via[ANH], save_via[0]);
1779         out_8(&via[DIRA], save_via[1]);
1780         out_8(&via[B], save_via[2]);
1781         out_8(&via[DIRB], save_via[3]);
1782         out_8(&via[PCR], save_via[4]);
1783         out_8(&via[ACR], save_via[5]);
1784         out_8(&via[T1CL], save_via[6]);
1785         out_8(&via[T1CH], save_via[7]);
1786         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
1787         out_8(&via[IFR], 0x7f);                         /* clear IFR */
1788         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1789 }
1790
1791 #define GRACKLE_PM      (1<<7)
1792 #define GRACKLE_DOZE    (1<<5)
1793 #define GRACKLE_NAP     (1<<4)
1794 #define GRACKLE_SLEEP   (1<<3)
1795
1796 static int powerbook_sleep_grackle(void)
1797 {
1798         unsigned long save_l2cr;
1799         unsigned short pmcr1;
1800         struct adb_request req;
1801         struct pci_dev *grackle;
1802
1803         grackle = pci_get_bus_and_slot(0, 0);
1804         if (!grackle)
1805                 return -ENODEV;
1806
1807         /* Turn off various things. Darwin does some retry tests here... */
1808         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1809         pmu_wait_complete(&req);
1810         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1811                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1812         pmu_wait_complete(&req);
1813
1814         /* For 750, save backside cache setting and disable it */
1815         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1816
1817         if (!__fake_sleep) {
1818                 /* Ask the PMU to put us to sleep */
1819                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1820                 pmu_wait_complete(&req);
1821         }
1822
1823         /* The VIA is supposed not to be restored correctly*/
1824         save_via_state();
1825         /* We shut down some HW */
1826         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1827
1828         pci_read_config_word(grackle, 0x70, &pmcr1);
1829         /* Apparently, MacOS uses NAP mode for Grackle ??? */
1830         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1831         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1832         pci_write_config_word(grackle, 0x70, pmcr1);
1833
1834         /* Call low-level ASM sleep handler */
1835         if (__fake_sleep)
1836                 mdelay(5000);
1837         else
1838                 low_sleep_handler();
1839
1840         /* We're awake again, stop grackle PM */
1841         pci_read_config_word(grackle, 0x70, &pmcr1);
1842         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1843         pci_write_config_word(grackle, 0x70, pmcr1);
1844
1845         pci_dev_put(grackle);
1846
1847         /* Make sure the PMU is idle */
1848         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1849         restore_via_state();
1850
1851         /* Restore L2 cache */
1852         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1853                 _set_L2CR(save_l2cr);
1854
1855         /* Restore userland MMU context */
1856         switch_mmu_context(NULL, current->active_mm, NULL);
1857
1858         /* Power things up */
1859         pmu_unlock();
1860         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1861         pmu_wait_complete(&req);
1862         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1863                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1864         pmu_wait_complete(&req);
1865         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1866                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1867         pmu_wait_complete(&req);
1868
1869         return 0;
1870 }
1871
1872 static int
1873 powerbook_sleep_Core99(void)
1874 {
1875         unsigned long save_l2cr;
1876         unsigned long save_l3cr;
1877         struct adb_request req;
1878
1879         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1880                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1881                 return -ENOSYS;
1882         }
1883
1884         if (num_online_cpus() > 1 || cpu_is_offline(0))
1885                 return -EAGAIN;
1886
1887         /* Stop environment and ADB interrupts */
1888         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1889         pmu_wait_complete(&req);
1890
1891         /* Tell PMU what events will wake us up */
1892         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1893                 0xff, 0xff);
1894         pmu_wait_complete(&req);
1895         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1896                 0, PMU_PWR_WAKEUP_KEY |
1897                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1898         pmu_wait_complete(&req);
1899
1900         /* Save the state of the L2 and L3 caches */
1901         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
1902         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1903
1904         if (!__fake_sleep) {
1905                 /* Ask the PMU to put us to sleep */
1906                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1907                 pmu_wait_complete(&req);
1908         }
1909
1910         /* The VIA is supposed not to be restored correctly*/
1911         save_via_state();
1912
1913         /* Shut down various ASICs. There's a chance that we can no longer
1914          * talk to the PMU after this, so I moved it to _after_ sending the
1915          * sleep command to it. Still need to be checked.
1916          */
1917         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1918
1919         /* Call low-level ASM sleep handler */
1920         if (__fake_sleep)
1921                 mdelay(5000);
1922         else
1923                 low_sleep_handler();
1924
1925         /* Restore Apple core ASICs state */
1926         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1927
1928         /* Restore VIA */
1929         restore_via_state();
1930
1931         /* tweak LPJ before cpufreq is there */
1932         loops_per_jiffy *= 2;
1933
1934         /* Restore video */
1935         pmac_call_early_video_resume();
1936
1937         /* Restore L2 cache */
1938         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1939                 _set_L2CR(save_l2cr);
1940         /* Restore L3 cache */
1941         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1942                 _set_L3CR(save_l3cr);
1943
1944         /* Restore userland MMU context */
1945         switch_mmu_context(NULL, current->active_mm, NULL);
1946
1947         /* Tell PMU we are ready */
1948         pmu_unlock();
1949         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1950         pmu_wait_complete(&req);
1951         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1952         pmu_wait_complete(&req);
1953
1954         /* Restore LPJ, cpufreq will adjust the cpu frequency */
1955         loops_per_jiffy /= 2;
1956
1957         return 0;
1958 }
1959
1960 #define PB3400_MEM_CTRL         0xf8000000
1961 #define PB3400_MEM_CTRL_SLEEP   0x70
1962
1963 static void __iomem *pb3400_mem_ctrl;
1964
1965 static void powerbook_sleep_init_3400(void)
1966 {
1967         /* map in the memory controller registers */
1968         pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1969         if (pb3400_mem_ctrl == NULL)
1970                 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1971 }
1972
1973 static int powerbook_sleep_3400(void)
1974 {
1975         int i, x;
1976         unsigned int hid0;
1977         unsigned long msr;
1978         struct adb_request sleep_req;
1979         unsigned int __iomem *mem_ctrl_sleep;
1980
1981         if (pb3400_mem_ctrl == NULL)
1982                 return -ENOMEM;
1983         mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1984
1985         /* Set the memory controller to keep the memory refreshed
1986            while we're asleep */
1987         for (i = 0x403f; i >= 0x4000; --i) {
1988                 out_be32(mem_ctrl_sleep, i);
1989                 do {
1990                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1991                 } while (x == 0);
1992                 if (x >= 0x100)
1993                         break;
1994         }
1995
1996         /* Ask the PMU to put us to sleep */
1997         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1998         pmu_wait_complete(&sleep_req);
1999         pmu_unlock();
2000
2001         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2002
2003         asleep = 1;
2004
2005         /* Put the CPU into sleep mode */
2006         hid0 = mfspr(SPRN_HID0);
2007         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2008         mtspr(SPRN_HID0, hid0);
2009         local_irq_enable();
2010         msr = mfmsr() | MSR_POW;
2011         while (asleep) {
2012                 mb();
2013                 mtmsr(msr);
2014                 isync();
2015         }
2016         local_irq_disable();
2017
2018         /* OK, we're awake again, start restoring things */
2019         out_be32(mem_ctrl_sleep, 0x3f);
2020         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2021
2022         return 0;
2023 }
2024
2025 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2026
2027 /*
2028  * Support for /dev/pmu device
2029  */
2030 #define RB_SIZE         0x10
2031 struct pmu_private {
2032         struct list_head list;
2033         int     rb_get;
2034         int     rb_put;
2035         struct rb_entry {
2036                 unsigned short len;
2037                 unsigned char data[16];
2038         }       rb_buf[RB_SIZE];
2039         wait_queue_head_t wait;
2040         spinlock_t lock;
2041 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2042         int     backlight_locker;
2043 #endif
2044 };
2045
2046 static LIST_HEAD(all_pmu_pvt);
2047 static DEFINE_SPINLOCK(all_pvt_lock);
2048
2049 static void
2050 pmu_pass_intr(unsigned char *data, int len)
2051 {
2052         struct pmu_private *pp;
2053         struct list_head *list;
2054         int i;
2055         unsigned long flags;
2056
2057         if (len > sizeof(pp->rb_buf[0].data))
2058                 len = sizeof(pp->rb_buf[0].data);
2059         spin_lock_irqsave(&all_pvt_lock, flags);
2060         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2061                 pp = list_entry(list, struct pmu_private, list);
2062                 spin_lock(&pp->lock);
2063                 i = pp->rb_put + 1;
2064                 if (i >= RB_SIZE)
2065                         i = 0;
2066                 if (i != pp->rb_get) {
2067                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2068                         rp->len = len;
2069                         memcpy(rp->data, data, len);
2070                         pp->rb_put = i;
2071                         wake_up_interruptible(&pp->wait);
2072                 }
2073                 spin_unlock(&pp->lock);
2074         }
2075         spin_unlock_irqrestore(&all_pvt_lock, flags);
2076 }
2077
2078 static int
2079 pmu_open(struct inode *inode, struct file *file)
2080 {
2081         struct pmu_private *pp;
2082         unsigned long flags;
2083
2084         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2085         if (pp == 0)
2086                 return -ENOMEM;
2087         pp->rb_get = pp->rb_put = 0;
2088         spin_lock_init(&pp->lock);
2089         init_waitqueue_head(&pp->wait);
2090         mutex_lock(&pmu_info_proc_mutex);
2091         spin_lock_irqsave(&all_pvt_lock, flags);
2092 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2093         pp->backlight_locker = 0;
2094 #endif
2095         list_add(&pp->list, &all_pmu_pvt);
2096         spin_unlock_irqrestore(&all_pvt_lock, flags);
2097         file->private_data = pp;
2098         mutex_unlock(&pmu_info_proc_mutex);
2099         return 0;
2100 }
2101
2102 static ssize_t
2103 pmu_read(struct file *file, char __user *buf,
2104                         size_t count, loff_t *ppos)
2105 {
2106         struct pmu_private *pp = file->private_data;
2107         DECLARE_WAITQUEUE(wait, current);
2108         unsigned long flags;
2109         int ret = 0;
2110
2111         if (count < 1 || pp == 0)
2112                 return -EINVAL;
2113         if (!access_ok(VERIFY_WRITE, buf, count))
2114                 return -EFAULT;
2115
2116         spin_lock_irqsave(&pp->lock, flags);
2117         add_wait_queue(&pp->wait, &wait);
2118         set_current_state(TASK_INTERRUPTIBLE);
2119
2120         for (;;) {
2121                 ret = -EAGAIN;
2122                 if (pp->rb_get != pp->rb_put) {
2123                         int i = pp->rb_get;
2124                         struct rb_entry *rp = &pp->rb_buf[i];
2125                         ret = rp->len;
2126                         spin_unlock_irqrestore(&pp->lock, flags);
2127                         if (ret > count)
2128                                 ret = count;
2129                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2130                                 ret = -EFAULT;
2131                         if (++i >= RB_SIZE)
2132                                 i = 0;
2133                         spin_lock_irqsave(&pp->lock, flags);
2134                         pp->rb_get = i;
2135                 }
2136                 if (ret >= 0)
2137                         break;
2138                 if (file->f_flags & O_NONBLOCK)
2139                         break;
2140                 ret = -ERESTARTSYS;
2141                 if (signal_pending(current))
2142                         break;
2143                 spin_unlock_irqrestore(&pp->lock, flags);
2144                 schedule();
2145                 spin_lock_irqsave(&pp->lock, flags);
2146         }
2147         __set_current_state(TASK_RUNNING);
2148         remove_wait_queue(&pp->wait, &wait);
2149         spin_unlock_irqrestore(&pp->lock, flags);
2150
2151         return ret;
2152 }
2153
2154 static ssize_t
2155 pmu_write(struct file *file, const char __user *buf,
2156                          size_t count, loff_t *ppos)
2157 {
2158         return 0;
2159 }
2160
2161 static unsigned int
2162 pmu_fpoll(struct file *filp, poll_table *wait)
2163 {
2164         struct pmu_private *pp = filp->private_data;
2165         unsigned int mask = 0;
2166         unsigned long flags;
2167
2168         if (pp == 0)
2169                 return 0;
2170         poll_wait(filp, &pp->wait, wait);
2171         spin_lock_irqsave(&pp->lock, flags);
2172         if (pp->rb_get != pp->rb_put)
2173                 mask |= POLLIN;
2174         spin_unlock_irqrestore(&pp->lock, flags);
2175         return mask;
2176 }
2177
2178 static int
2179 pmu_release(struct inode *inode, struct file *file)
2180 {
2181         struct pmu_private *pp = file->private_data;
2182         unsigned long flags;
2183
2184         if (pp != 0) {
2185                 file->private_data = NULL;
2186                 spin_lock_irqsave(&all_pvt_lock, flags);
2187                 list_del(&pp->list);
2188                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2189
2190 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2191                 if (pp->backlight_locker)
2192                         pmac_backlight_enable();
2193 #endif
2194
2195                 kfree(pp);
2196         }
2197         return 0;
2198 }
2199
2200 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2201 static void pmac_suspend_disable_irqs(void)
2202 {
2203         /* Call platform functions marked "on sleep" */
2204         pmac_pfunc_i2c_suspend();
2205         pmac_pfunc_base_suspend();
2206 }
2207
2208 static int powerbook_sleep(suspend_state_t state)
2209 {
2210         int error = 0;
2211
2212         /* Wait for completion of async requests */
2213         while (!batt_req.complete)
2214                 pmu_poll();
2215
2216         /* Giveup the lazy FPU & vec so we don't have to back them
2217          * up from the low level code
2218          */
2219         enable_kernel_fp();
2220
2221 #ifdef CONFIG_ALTIVEC
2222         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2223                 enable_kernel_altivec();
2224 #endif /* CONFIG_ALTIVEC */
2225
2226         switch (pmu_kind) {
2227         case PMU_OHARE_BASED:
2228                 error = powerbook_sleep_3400();
2229                 break;
2230         case PMU_HEATHROW_BASED:
2231         case PMU_PADDINGTON_BASED:
2232                 error = powerbook_sleep_grackle();
2233                 break;
2234         case PMU_KEYLARGO_BASED:
2235                 error = powerbook_sleep_Core99();
2236                 break;
2237         default:
2238                 return -ENOSYS;
2239         }
2240
2241         if (error)
2242                 return error;
2243
2244         mdelay(100);
2245
2246         return 0;
2247 }
2248
2249 static void pmac_suspend_enable_irqs(void)
2250 {
2251         /* Force a poll of ADB interrupts */
2252         adb_int_pending = 1;
2253         via_pmu_interrupt(0, NULL);
2254
2255         mdelay(10);
2256
2257         /* Call platform functions marked "on wake" */
2258         pmac_pfunc_base_resume();
2259         pmac_pfunc_i2c_resume();
2260 }
2261
2262 static int pmu_sleep_valid(suspend_state_t state)
2263 {
2264         return state == PM_SUSPEND_MEM
2265                 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2266 }
2267
2268 static const struct platform_suspend_ops pmu_pm_ops = {
2269         .enter = powerbook_sleep,
2270         .valid = pmu_sleep_valid,
2271 };
2272
2273 static int register_pmu_pm_ops(void)
2274 {
2275         if (pmu_kind == PMU_OHARE_BASED)
2276                 powerbook_sleep_init_3400();
2277         ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2278         ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2279         suspend_set_ops(&pmu_pm_ops);
2280
2281         return 0;
2282 }
2283
2284 device_initcall(register_pmu_pm_ops);
2285 #endif
2286
2287 static int pmu_ioctl(struct file *filp,
2288                      u_int cmd, u_long arg)
2289 {
2290         __u32 __user *argp = (__u32 __user *)arg;
2291         int error = -EINVAL;
2292
2293         switch (cmd) {
2294         case PMU_IOC_SLEEP:
2295                 if (!capable(CAP_SYS_ADMIN))
2296                         return -EACCES;
2297                 return pm_suspend(PM_SUSPEND_MEM);
2298         case PMU_IOC_CAN_SLEEP:
2299                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2300                         return put_user(0, argp);
2301                 else
2302                         return put_user(1, argp);
2303
2304 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2305         /* Compatibility ioctl's for backlight */
2306         case PMU_IOC_GET_BACKLIGHT:
2307         {
2308                 int brightness;
2309
2310                 brightness = pmac_backlight_get_legacy_brightness();
2311                 if (brightness < 0)
2312                         return brightness;
2313                 else
2314                         return put_user(brightness, argp);
2315
2316         }
2317         case PMU_IOC_SET_BACKLIGHT:
2318         {
2319                 int brightness;
2320
2321                 error = get_user(brightness, argp);
2322                 if (error)
2323                         return error;
2324
2325                 return pmac_backlight_set_legacy_brightness(brightness);
2326         }
2327 #ifdef CONFIG_INPUT_ADBHID
2328         case PMU_IOC_GRAB_BACKLIGHT: {
2329                 struct pmu_private *pp = filp->private_data;
2330
2331                 if (pp->backlight_locker)
2332                         return 0;
2333
2334                 pp->backlight_locker = 1;
2335                 pmac_backlight_disable();
2336
2337                 return 0;
2338         }
2339 #endif /* CONFIG_INPUT_ADBHID */
2340 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2341
2342         case PMU_IOC_GET_MODEL:
2343                 return put_user(pmu_kind, argp);
2344         case PMU_IOC_HAS_ADB:
2345                 return put_user(pmu_has_adb, argp);
2346         }
2347         return error;
2348 }
2349
2350 static long pmu_unlocked_ioctl(struct file *filp,
2351                                u_int cmd, u_long arg)
2352 {
2353         int ret;
2354
2355         mutex_lock(&pmu_info_proc_mutex);
2356         ret = pmu_ioctl(filp, cmd, arg);
2357         mutex_unlock(&pmu_info_proc_mutex);
2358
2359         return ret;
2360 }
2361
2362 #ifdef CONFIG_COMPAT
2363 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2364 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2365 #define PMU_IOC_GET_MODEL32     _IOR('B', 3, compat_size_t)
2366 #define PMU_IOC_HAS_ADB32       _IOR('B', 4, compat_size_t)
2367 #define PMU_IOC_CAN_SLEEP32     _IOR('B', 5, compat_size_t)
2368 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2369
2370 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2371 {
2372         switch (cmd) {
2373         case PMU_IOC_SLEEP:
2374                 break;
2375         case PMU_IOC_GET_BACKLIGHT32:
2376                 cmd = PMU_IOC_GET_BACKLIGHT;
2377                 break;
2378         case PMU_IOC_SET_BACKLIGHT32:
2379                 cmd = PMU_IOC_SET_BACKLIGHT;
2380                 break;
2381         case PMU_IOC_GET_MODEL32:
2382                 cmd = PMU_IOC_GET_MODEL;
2383                 break;
2384         case PMU_IOC_HAS_ADB32:
2385                 cmd = PMU_IOC_HAS_ADB;
2386                 break;
2387         case PMU_IOC_CAN_SLEEP32:
2388                 cmd = PMU_IOC_CAN_SLEEP;
2389                 break;
2390         case PMU_IOC_GRAB_BACKLIGHT32:
2391                 cmd = PMU_IOC_GRAB_BACKLIGHT;
2392                 break;
2393         default:
2394                 return -ENOIOCTLCMD;
2395         }
2396         return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2397 }
2398 #endif
2399
2400 static const struct file_operations pmu_device_fops = {
2401         .read           = pmu_read,
2402         .write          = pmu_write,
2403         .poll           = pmu_fpoll,
2404         .unlocked_ioctl = pmu_unlocked_ioctl,
2405 #ifdef CONFIG_COMPAT
2406         .compat_ioctl   = compat_pmu_ioctl,
2407 #endif
2408         .open           = pmu_open,
2409         .release        = pmu_release,
2410         .llseek         = noop_llseek,
2411 };
2412
2413 static struct miscdevice pmu_device = {
2414         PMU_MINOR, "pmu", &pmu_device_fops
2415 };
2416
2417 static int pmu_device_init(void)
2418 {
2419         if (!via)
2420                 return 0;
2421         if (misc_register(&pmu_device) < 0)
2422                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2423         return 0;
2424 }
2425 device_initcall(pmu_device_init);
2426
2427
2428 #ifdef DEBUG_SLEEP
2429 static inline void
2430 polled_handshake(volatile unsigned char __iomem *via)
2431 {
2432         via[B] &= ~TREQ; eieio();
2433         while ((via[B] & TACK) != 0)
2434                 ;
2435         via[B] |= TREQ; eieio();
2436         while ((via[B] & TACK) == 0)
2437                 ;
2438 }
2439
2440 static inline void
2441 polled_send_byte(volatile unsigned char __iomem *via, int x)
2442 {
2443         via[ACR] |= SR_OUT | SR_EXT; eieio();
2444         via[SR] = x; eieio();
2445         polled_handshake(via);
2446 }
2447
2448 static inline int
2449 polled_recv_byte(volatile unsigned char __iomem *via)
2450 {
2451         int x;
2452
2453         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2454         x = via[SR]; eieio();
2455         polled_handshake(via);
2456         x = via[SR]; eieio();
2457         return x;
2458 }
2459
2460 int
2461 pmu_polled_request(struct adb_request *req)
2462 {
2463         unsigned long flags;
2464         int i, l, c;
2465         volatile unsigned char __iomem *v = via;
2466
2467         req->complete = 1;
2468         c = req->data[0];
2469         l = pmu_data_len[c][0];
2470         if (l >= 0 && req->nbytes != l + 1)
2471                 return -EINVAL;
2472
2473         local_irq_save(flags);
2474         while (pmu_state != idle)
2475                 pmu_poll();
2476
2477         while ((via[B] & TACK) == 0)
2478                 ;
2479         polled_send_byte(v, c);
2480         if (l < 0) {
2481                 l = req->nbytes - 1;
2482                 polled_send_byte(v, l);
2483         }
2484         for (i = 1; i <= l; ++i)
2485                 polled_send_byte(v, req->data[i]);
2486
2487         l = pmu_data_len[c][1];
2488         if (l < 0)
2489                 l = polled_recv_byte(v);
2490         for (i = 0; i < l; ++i)
2491                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2492
2493         if (req->done)
2494                 (*req->done)(req);
2495
2496         local_irq_restore(flags);
2497         return 0;
2498 }
2499
2500 /* N.B. This doesn't work on the 3400 */
2501 void pmu_blink(int n)
2502 {
2503         struct adb_request req;
2504
2505         memset(&req, 0, sizeof(req));
2506
2507         for (; n > 0; --n) {
2508                 req.nbytes = 4;
2509                 req.done = NULL;
2510                 req.data[0] = 0xee;
2511                 req.data[1] = 4;
2512                 req.data[2] = 0;
2513                 req.data[3] = 1;
2514                 req.reply[0] = ADB_RET_OK;
2515                 req.reply_len = 1;
2516                 req.reply_expected = 0;
2517                 pmu_polled_request(&req);
2518                 mdelay(50);
2519                 req.nbytes = 4;
2520                 req.done = NULL;
2521                 req.data[0] = 0xee;
2522                 req.data[1] = 4;
2523                 req.data[2] = 0;
2524                 req.data[3] = 0;
2525                 req.reply[0] = ADB_RET_OK;
2526                 req.reply_len = 1;
2527                 req.reply_expected = 0;
2528                 pmu_polled_request(&req);
2529                 mdelay(50);
2530         }
2531         mdelay(50);
2532 }
2533 #endif /* DEBUG_SLEEP */
2534
2535 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2536 int pmu_sys_suspended;
2537
2538 static int pmu_syscore_suspend(void)
2539 {
2540         /* Suspend PMU event interrupts */
2541         pmu_suspend();
2542         pmu_sys_suspended = 1;
2543
2544 #ifdef CONFIG_PMAC_BACKLIGHT
2545         /* Tell backlight code not to muck around with the chip anymore */
2546         pmu_backlight_set_sleep(1);
2547 #endif
2548
2549         return 0;
2550 }
2551
2552 static void pmu_syscore_resume(void)
2553 {
2554         struct adb_request req;
2555
2556         if (!pmu_sys_suspended)
2557                 return;
2558
2559         /* Tell PMU we are ready */
2560         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2561         pmu_wait_complete(&req);
2562
2563 #ifdef CONFIG_PMAC_BACKLIGHT
2564         /* Tell backlight code it can use the chip again */
2565         pmu_backlight_set_sleep(0);
2566 #endif
2567         /* Resume PMU event interrupts */
2568         pmu_resume();
2569         pmu_sys_suspended = 0;
2570 }
2571
2572 static struct syscore_ops pmu_syscore_ops = {
2573         .suspend = pmu_syscore_suspend,
2574         .resume = pmu_syscore_resume,
2575 };
2576
2577 static int pmu_syscore_register(void)
2578 {
2579         register_syscore_ops(&pmu_syscore_ops);
2580
2581         return 0;
2582 }
2583 subsys_initcall(pmu_syscore_register);
2584 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2585
2586 EXPORT_SYMBOL(pmu_request);
2587 EXPORT_SYMBOL(pmu_queue_request);
2588 EXPORT_SYMBOL(pmu_poll);
2589 EXPORT_SYMBOL(pmu_poll_adb);
2590 EXPORT_SYMBOL(pmu_wait_complete);
2591 EXPORT_SYMBOL(pmu_suspend);
2592 EXPORT_SYMBOL(pmu_resume);
2593 EXPORT_SYMBOL(pmu_unlock);
2594 #if defined(CONFIG_PPC32)
2595 EXPORT_SYMBOL(pmu_enable_irled);
2596 EXPORT_SYMBOL(pmu_battery_count);
2597 EXPORT_SYMBOL(pmu_batteries);
2598 EXPORT_SYMBOL(pmu_power_flags);
2599 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2600