drivers/macintosh/via-pmu.c

   1 /*
   2  * Device driver for the via-pmu on Apple Powermacs.
   3  *
   4  * The VIA (versatile interface adapter) interfaces to the PMU,
   5  * a 6805 microprocessor core whose primary function is to control
   6  * battery charging and system power on the PowerBook 3400 and 2400.
   7  * The PMU also controls the ADB (Apple Desktop Bus) which connects
   8  * to the keyboard and mouse, as well as the non-volatile RAM
   9  * and the RTC (real time clock) chip.
  10  *
  11  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
  12  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
  13  *
  14  * THIS DRIVER IS BECOMING A TOTAL MESS !
  15  *  - Cleanup atomically disabling reply to PMU events after
  16  *    a sleep or a freq. switch
  17  *  - Move sleep code out of here to pmac_pm, merge into new
  18  *    common PM infrastructure
  19  *  - Save/Restore PCI space properly
  20  *
  21  */
  22 #include <stdarg.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.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/init.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/device.h>
  43 #include <linux/sysdev.h>
  44 #include <linux/freezer.h>
  45 #include <linux/syscalls.h>
  46 #include <linux/suspend.h>
  47 #include <linux/cpu.h>
  48 #include <asm/prom.h>
  49 #include <asm/machdep.h>
  50 #include <asm/io.h>
  51 #include <asm/pgtable.h>
  52 #include <asm/system.h>
  53 #include <asm/sections.h>
  54 #include <asm/irq.h>
  55 #include <asm/pmac_feature.h>
  56 #include <asm/pmac_pfunc.h>
  57 #include <asm/pmac_low_i2c.h>
  58 #include <asm/uaccess.h>
  59 #include <asm/mmu_context.h>
  60 #include <asm/cputable.h>
  61 #include <asm/time.h>
  62 #include <asm/backlight.h>
  63
  64 #include "via-pmu-event.h"
  65
  66 /* Some compile options */
  67 #define DEBUG_SLEEP
  68
  69 /* Misc minor number allocated for /dev/pmu */
  70 #define PMU_MINOR               154
  71
  72 /* How many iterations between battery polls */
  73 #define BATTERY_POLLING_COUNT   2
  74
  75 static volatile unsigned char __iomem *via;
  76
  77 /* VIA registers - spaced 0x200 bytes apart */
  78 #define RS              0x200           /* skip between registers */
  79 #define B               0               /* B-side data */
  80 #define A               RS              /* A-side data */
  81 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  82 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  83 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  84 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  85 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  86 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  87 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  88 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  89 #define SR              (10*RS)         /* Shift register */
  90 #define ACR             (11*RS)         /* Auxiliary control register */
  91 #define PCR             (12*RS)         /* Peripheral control register */
  92 #define IFR             (13*RS)         /* Interrupt flag register */
  93 #define IER             (14*RS)         /* Interrupt enable register */
  94 #define ANH             (15*RS)         /* A-side data, no handshake */
  95
  96 /* Bits in B data register: both active low */
  97 #define TACK            0x08            /* Transfer acknowledge (input) */
  98 #define TREQ            0x10            /* Transfer request (output) */
  99
 100 /* Bits in ACR */
 101 #define SR_CTRL         0x1c            /* Shift register control bits */
 102 #define SR_EXT          0x0c            /* Shift on external clock */
 103 #define SR_OUT          0x10            /* Shift out if 1 */
 104
 105 /* Bits in IFR and IER */
 106 #define IER_SET         0x80            /* set bits in IER */
 107 #define IER_CLR         0               /* clear bits in IER */
 108 #define SR_INT          0x04            /* Shift register full/empty */
 109 #define CB2_INT         0x08
 110 #define CB1_INT         0x10            /* transition on CB1 input */
 111
 112 static volatile enum pmu_state {
 113         idle,
 114         sending,
 115         intack,
 116         reading,
 117         reading_intr,
 118         locked,
 119 } pmu_state;
 120
 121 static volatile enum int_data_state {
 122         int_data_empty,
 123         int_data_fill,
 124         int_data_ready,
 125         int_data_flush
 126 } int_data_state[2] = { int_data_empty, int_data_empty };
 127
 128 static struct adb_request *current_req;
 129 static struct adb_request *last_req;
 130 static struct adb_request *req_awaiting_reply;
 131 static unsigned char interrupt_data[2][32];
 132 static int interrupt_data_len[2];
 133 static int int_data_last;
 134 static unsigned char *reply_ptr;
 135 static int data_index;
 136 static int data_len;
 137 static volatile int adb_int_pending;
 138 static volatile int disable_poll;
 139 static struct device_node *vias;
 140 static int pmu_kind = PMU_UNKNOWN;
 141 static int pmu_fully_inited;
 142 static int pmu_has_adb;
 143 static struct device_node *gpio_node;
 144 static unsigned char __iomem *gpio_reg;
 145 static int gpio_irq = NO_IRQ;
 146 static int gpio_irq_enabled = -1;
 147 static volatile int pmu_suspended;
 148 static spinlock_t pmu_lock;
 149 static u8 pmu_intr_mask;
 150 static int pmu_version;
 151 static int drop_interrupts;
 152 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
 153 static int option_lid_wakeup = 1;
 154 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */
 155 #if (defined(CONFIG_PM_SLEEP)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT_LEGACY)
 156 static int sleep_in_progress;
 157 #endif
 158 static unsigned long async_req_locks;
 159 static unsigned int pmu_irq_stats[11];
 160
 161 static struct proc_dir_entry *proc_pmu_root;
 162 static struct proc_dir_entry *proc_pmu_info;
 163 static struct proc_dir_entry *proc_pmu_irqstats;
 164 static struct proc_dir_entry *proc_pmu_options;
 165 static int option_server_mode;
 166
 167 int pmu_battery_count;
 168 int pmu_cur_battery;
 169 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 170 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 171 static int query_batt_timer = BATTERY_POLLING_COUNT;
 172 static struct adb_request batt_req;
 173 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 174
 175 int __fake_sleep;
 176 int asleep;
 177 BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
 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 int proc_get_info(char *page, char **start, off_t off,
 195                           int count, int *eof, void *data);
 196 static int proc_get_irqstats(char *page, char **start, off_t off,
 197                           int count, int *eof, void *data);
 198 static void pmu_pass_intr(unsigned char *data, int len);
 199 static int proc_get_batt(char *page, char **start, off_t off,
 200                         int count, int *eof, void *data);
 201 static int proc_read_options(char *page, char **start, off_t off,
 202                         int count, int *eof, void *data);
 203 static int proc_write_options(struct file *file, const char __user *buffer,
 204                         unsigned long count, void *data);
 205
 206 #ifdef CONFIG_ADB
 207 struct adb_driver via_pmu_driver = {
 208         "PMU",
 209         pmu_probe,
 210         pmu_init,
 211         pmu_send_request,
 212         pmu_adb_autopoll,
 213         pmu_poll_adb,
 214         pmu_adb_reset_bus
 215 };
 216 #endif /* CONFIG_ADB */
 217
 218 extern void low_sleep_handler(void);
 219 extern void enable_kernel_altivec(void);
 220 extern void enable_kernel_fp(void);
 221
 222 #ifdef DEBUG_SLEEP
 223 int pmu_polled_request(struct adb_request *req);
 224 int pmu_wink(struct adb_request *req);
 225 #endif
 226
 227 /*
 228  * This table indicates for each PMU opcode:
 229  * - the number of data bytes to be sent with the command, or -1
 230  *   if a length byte should be sent,
 231  * - the number of response bytes which the PMU will return, or
 232  *   -1 if it will send a length byte.
 233  */
 234 static const s8 pmu_data_len[256][2] = {
 235 /*         0       1       2       3       4       5       6       7  */
 236 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 237 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 238 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 239 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 240 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 241 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 242 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 243 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 244 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 245 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 246 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 247 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 248 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 249 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 250 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 251 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 252 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 253 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 254 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 255 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 256 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 257 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 258 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 259 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 260 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 261 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 262 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 263 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 264 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 265 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 266 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 267 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 268 };
 269
 270 static char *pbook_type[] = {
 271         "Unknown PowerBook",
 272         "PowerBook 2400/3400/3500(G3)",
 273         "PowerBook G3 Series",
 274         "1999 PowerBook G3",
 275         "Core99"
 276 };
 277
 278 int __init find_via_pmu(void)
 279 {
 280         u64 taddr;
 281         const u32 *reg;
 282
 283         if (via != 0)
 284                 return 1;
 285         vias = of_find_node_by_name(NULL, "via-pmu");
 286         if (vias == NULL)
 287                 return 0;
 288
 289         reg = of_get_property(vias, "reg", NULL);
 290         if (reg == NULL) {
 291                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 292                 goto fail;
 293         }
 294         taddr = of_translate_address(vias, reg);
 295         if (taddr == OF_BAD_ADDR) {
 296                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 297                 goto fail;
 298         }
 299
 300         spin_lock_init(&pmu_lock);
 301
 302         pmu_has_adb = 1;
 303
 304         pmu_intr_mask = PMU_INT_PCEJECT |
 305                         PMU_INT_SNDBRT |
 306                         PMU_INT_ADB |
 307                         PMU_INT_TICK;
 308
 309         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 310             || of_device_is_compatible(vias->parent, "ohare")))
 311                 pmu_kind = PMU_OHARE_BASED;
 312         else if (of_device_is_compatible(vias->parent, "paddington"))
 313                 pmu_kind = PMU_PADDINGTON_BASED;
 314         else if (of_device_is_compatible(vias->parent, "heathrow"))
 315                 pmu_kind = PMU_HEATHROW_BASED;
 316         else if (of_device_is_compatible(vias->parent, "Keylargo")
 317                  || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
 318                 struct device_node *gpiop;
 319                 struct device_node *adbp;
 320                 u64 gaddr = OF_BAD_ADDR;
 321
 322                 pmu_kind = PMU_KEYLARGO_BASED;
 323                 adbp = of_find_node_by_type(NULL, "adb");
 324                 pmu_has_adb = (adbp != NULL);
 325                 of_node_put(adbp);
 326                 pmu_intr_mask = PMU_INT_PCEJECT |
 327                                 PMU_INT_SNDBRT |
 328                                 PMU_INT_ADB |
 329                                 PMU_INT_TICK |
 330                                 PMU_INT_ENVIRONMENT;
 331
 332                 gpiop = of_find_node_by_name(NULL, "gpio");
 333                 if (gpiop) {
 334                         reg = of_get_property(gpiop, "reg", NULL);
 335                         if (reg)
 336                                 gaddr = of_translate_address(gpiop, reg);
 337                         if (gaddr != OF_BAD_ADDR)
 338                                 gpio_reg = ioremap(gaddr, 0x10);
 339                 }
 340                 if (gpio_reg == NULL) {
 341                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 342                         goto fail_gpio;
 343                 }
 344         } else
 345                 pmu_kind = PMU_UNKNOWN;
 346
 347         via = ioremap(taddr, 0x2000);
 348         if (via == NULL) {
 349                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 350                 goto fail;
 351         }
 352
 353         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 354         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 355
 356         pmu_state = idle;
 357
 358         if (!init_pmu()) {
 359                 via = NULL;
 360                 return 0;
 361         }
 362
 363         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 364                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 365
 366         sys_ctrler = SYS_CTRLER_PMU;
 367
 368         return 1;
 369  fail:
 370         of_node_put(vias);
 371         iounmap(gpio_reg);
 372         gpio_reg = NULL;
 373  fail_gpio:
 374         vias = NULL;
 375         return 0;
 376 }
 377
 378 #ifdef CONFIG_ADB
 379 static int pmu_probe(void)
 380 {
 381         return vias == NULL? -ENODEV: 0;
 382 }
 383
 384 static int __init pmu_init(void)
 385 {
 386         if (vias == NULL)
 387                 return -ENODEV;
 388         return 0;
 389 }
 390 #endif /* CONFIG_ADB */
 391
 392 /*
 393  * We can't wait until pmu_init gets called, that happens too late.
 394  * It happens after IDE and SCSI initialization, which can take a few
 395  * seconds, and by that time the PMU could have given up on us and
 396  * turned us off.
 397  * Thus this is called with arch_initcall rather than device_initcall.
 398  */
 399 static int __init via_pmu_start(void)
 400 {
 401         unsigned int irq;
 402
 403         if (vias == NULL)
 404                 return -ENODEV;
 405
 406         batt_req.complete = 1;
 407
 408         irq = irq_of_parse_and_map(vias, 0);
 409         if (irq == NO_IRQ) {
 410                 printk(KERN_ERR "via-pmu: can't map interrupt\n");
 411                 return -ENODEV;
 412         }
 413         if (request_irq(irq, via_pmu_interrupt, 0, "VIA-PMU", (void *)0)) {
 414                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 415                 return -ENODEV;
 416         }
 417
 418         if (pmu_kind == PMU_KEYLARGO_BASED) {
 419                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 420                 if (gpio_node == NULL)
 421                         gpio_node = of_find_node_by_name(NULL,
 422                                                          "pmu-interrupt");
 423                 if (gpio_node)
 424                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 425
 426                 if (gpio_irq != NO_IRQ) {
 427                         if (request_irq(gpio_irq, gpio1_interrupt, 0,
 428                                         "GPIO1 ADB", (void *)0))
 429                                 printk(KERN_ERR "pmu: can't get irq %d"
 430                                        " (GPIO1)\n", gpio_irq);
 431                         else
 432                                 gpio_irq_enabled = 1;
 433                 }
 434         }
 435
 436         /* Enable interrupts */
 437         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 438
 439         pmu_fully_inited = 1;
 440
 441         /* Make sure PMU settle down before continuing. This is _very_ important
 442          * since the IDE probe may shut interrupts down for quite a bit of time. If
 443          * a PMU communication is pending while this happens, the PMU may timeout
 444          * Not that on Core99 machines, the PMU keeps sending us environement
 445          * messages, we should find a way to either fix IDE or make it call
 446          * pmu_suspend() before masking interrupts. This can also happens while
 447          * scolling with some fbdevs.
 448          */
 449         do {
 450                 pmu_poll();
 451         } while (pmu_state != idle);
 452
 453         return 0;
 454 }
 455
 456 arch_initcall(via_pmu_start);
 457
 458 /*
 459  * This has to be done after pci_init, which is a subsys_initcall.
 460  */
 461 static int __init via_pmu_dev_init(void)
 462 {
 463         if (vias == NULL)
 464                 return -ENODEV;
 465
 466 #ifdef CONFIG_PMAC_BACKLIGHT
 467         /* Initialize backlight */
 468         pmu_backlight_init();
 469 #endif
 470
 471 #ifdef CONFIG_PPC32
 472         if (machine_is_compatible("AAPL,3400/2400") ||
 473                 machine_is_compatible("AAPL,3500")) {
 474                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 475                         NULL, PMAC_MB_INFO_MODEL, 0);
 476                 pmu_battery_count = 1;
 477                 if (mb == PMAC_TYPE_COMET)
 478                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 479                 else
 480                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 481         } else if (machine_is_compatible("AAPL,PowerBook1998") ||
 482                 machine_is_compatible("PowerBook1,1")) {
 483                 pmu_battery_count = 2;
 484                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 485                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 486         } else {
 487                 struct device_node* prim =
 488                         of_find_node_by_name(NULL, "power-mgt");
 489                 const u32 *prim_info = NULL;
 490                 if (prim)
 491                         prim_info = of_get_property(prim, "prim-info", NULL);
 492                 if (prim_info) {
 493                         /* Other stuffs here yet unknown */
 494                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 495                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 496                         if (pmu_battery_count > 1)
 497                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 498                 }
 499                 of_node_put(prim);
 500         }
 501 #endif /* CONFIG_PPC32 */
 502
 503         /* Create /proc/pmu */
 504         proc_pmu_root = proc_mkdir("pmu", NULL);
 505         if (proc_pmu_root) {
 506                 long i;
 507
 508                 for (i=0; i<pmu_battery_count; i++) {
 509                         char title[16];
 510                         sprintf(title, "battery_%ld", i);
 511                         proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
 512                                                 proc_get_batt, (void *)i);
 513                 }
 514
 515                 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
 516                                         proc_get_info, NULL);
 517                 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
 518                                         proc_get_irqstats, NULL);
 519                 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
 520                 if (proc_pmu_options) {
 521                         proc_pmu_options->read_proc = proc_read_options;
 522                         proc_pmu_options->write_proc = proc_write_options;
 523                 }
 524         }
 525         return 0;
 526 }
 527
 528 device_initcall(via_pmu_dev_init);
 529
 530 static int
 531 init_pmu(void)
 532 {
 533         int timeout;
 534         struct adb_request req;
 535
 536         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 537         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 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                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 762                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 763                                 break;
 764                 }
 765         }
 766
 767         if ((req->reply[1] & 0x01) && (amperage > 0))
 768                 bat_flags |= PMU_BATT_CHARGING;
 769
 770         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 771         pmu_batteries[pmu_cur_battery].charge = capa;
 772         pmu_batteries[pmu_cur_battery].max_charge = max;
 773         pmu_batteries[pmu_cur_battery].amperage = amperage;
 774         pmu_batteries[pmu_cur_battery].voltage = voltage;
 775         if (amperage) {
 776                 if ((req->reply[1] & 0x01) && (amperage > 0))
 777                         pmu_batteries[pmu_cur_battery].time_remaining
 778                                 = ((max-capa) * 3600) / amperage;
 779                 else
 780                         pmu_batteries[pmu_cur_battery].time_remaining
 781                                 = (capa * 3600) / (-amperage);
 782         } else
 783                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 784
 785         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 786
 787         clear_bit(0, &async_req_locks);
 788 }
 789
 790 static void
 791 query_battery_state(void)
 792 {
 793         if (test_and_set_bit(0, &async_req_locks))
 794                 return;
 795         if (pmu_kind == PMU_OHARE_BASED)
 796                 pmu_request(&batt_req, done_battery_state_ohare,
 797                         1, PMU_BATTERY_STATE);
 798         else
 799                 pmu_request(&batt_req, done_battery_state_smart,
 800                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 801 }
 802
 803 static int
 804 proc_get_info(char *page, char **start, off_t off,
 805                 int count, int *eof, void *data)
 806 {
 807         char* p = page;
 808
 809         p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 810         p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
 811         p += sprintf(p, "AC Power               : %d\n",
 812                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 813         p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);
 814
 815         return p - page;
 816 }
 817
 818 static int
 819 proc_get_irqstats(char *page, char **start, off_t off,
 820                   int count, int *eof, void *data)
 821 {
 822         int i;
 823         char* p = page;
 824         static const char *irq_names[] = {
 825                 "Total CB1 triggered events",
 826                 "Total GPIO1 triggered events",
 827                 "PC-Card eject button",
 828                 "Sound/Brightness button",
 829                 "ADB message",
 830                 "Battery state change",
 831                 "Environment interrupt",
 832                 "Tick timer",
 833                 "Ghost interrupt (zero len)",
 834                 "Empty interrupt (empty mask)",
 835                 "Max irqs in a row"
 836         };
 837
 838         for (i=0; i<11; i++) {
 839                 p += sprintf(p, " %2u: %10u (%s)\n",
 840                              i, pmu_irq_stats[i], irq_names[i]);
 841         }
 842         return p - page;
 843 }
 844
 845 static int
 846 proc_get_batt(char *page, char **start, off_t off,
 847                 int count, int *eof, void *data)
 848 {
 849         long batnum = (long)data;
 850         char *p = page;
 851
 852         p += sprintf(p, "\n");
 853         p += sprintf(p, "flags      : %08x\n",
 854                 pmu_batteries[batnum].flags);
 855         p += sprintf(p, "charge     : %d\n",
 856                 pmu_batteries[batnum].charge);
 857         p += sprintf(p, "max_charge : %d\n",
 858                 pmu_batteries[batnum].max_charge);
 859         p += sprintf(p, "current    : %d\n",
 860                 pmu_batteries[batnum].amperage);
 861         p += sprintf(p, "voltage    : %d\n",
 862                 pmu_batteries[batnum].voltage);
 863         p += sprintf(p, "time rem.  : %d\n",
 864                 pmu_batteries[batnum].time_remaining);
 865
 866         return p - page;
 867 }
 868
 869 static int
 870 proc_read_options(char *page, char **start, off_t off,
 871                         int count, int *eof, void *data)
 872 {
 873         char *p = page;
 874
 875 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
 876         if (pmu_kind == PMU_KEYLARGO_BASED &&
 877             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 878                 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
 879 #endif
 880         if (pmu_kind == PMU_KEYLARGO_BASED)
 881                 p += sprintf(p, "server_mode=%d\n", option_server_mode);
 882
 883         return p - page;
 884 }
 885
 886 static int
 887 proc_write_options(struct file *file, const char __user *buffer,
 888                         unsigned long count, void *data)
 889 {
 890         char tmp[33];
 891         char *label, *val;
 892         unsigned long fcount = count;
 893
 894         if (!count)
 895                 return -EINVAL;
 896         if (count > 32)
 897                 count = 32;
 898         if (copy_from_user(tmp, buffer, count))
 899                 return -EFAULT;
 900         tmp[count] = 0;
 901
 902         label = tmp;
 903         while(*label == ' ')
 904                 label++;
 905         val = label;
 906         while(*val && (*val != '=')) {
 907                 if (*val == ' ')
 908                         *val = 0;
 909                 val++;
 910         }
 911         if ((*val) == 0)
 912                 return -EINVAL;
 913         *(val++) = 0;
 914         while(*val == ' ')
 915                 val++;
 916 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
 917         if (pmu_kind == PMU_KEYLARGO_BASED &&
 918             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 919                 if (!strcmp(label, "lid_wakeup"))
 920                         option_lid_wakeup = ((*val) == '1');
 921 #endif
 922         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 923                 int new_value;
 924                 new_value = ((*val) == '1');
 925                 if (new_value != option_server_mode)
 926                         pmu_set_server_mode(new_value);
 927         }
 928         return fcount;
 929 }
 930
 931 #ifdef CONFIG_ADB
 932 /* Send an ADB command */
 933 static int
 934 pmu_send_request(struct adb_request *req, int sync)
 935 {
 936         int i, ret;
 937
 938         if ((vias == NULL) || (!pmu_fully_inited)) {
 939                 req->complete = 1;
 940                 return -ENXIO;
 941         }
 942
 943         ret = -EINVAL;
 944
 945         switch (req->data[0]) {
 946         case PMU_PACKET:
 947                 for (i = 0; i < req->nbytes - 1; ++i)
 948                         req->data[i] = req->data[i+1];
 949                 --req->nbytes;
 950                 if (pmu_data_len[req->data[0]][1] != 0) {
 951                         req->reply[0] = ADB_RET_OK;
 952                         req->reply_len = 1;
 953                 } else
 954                         req->reply_len = 0;
 955                 ret = pmu_queue_request(req);
 956                 break;
 957         case CUDA_PACKET:
 958                 switch (req->data[1]) {
 959                 case CUDA_GET_TIME:
 960                         if (req->nbytes != 2)
 961                                 break;
 962                         req->data[0] = PMU_READ_RTC;
 963                         req->nbytes = 1;
 964                         req->reply_len = 3;
 965                         req->reply[0] = CUDA_PACKET;
 966                         req->reply[1] = 0;
 967                         req->reply[2] = CUDA_GET_TIME;
 968                         ret = pmu_queue_request(req);
 969                         break;
 970                 case CUDA_SET_TIME:
 971                         if (req->nbytes != 6)
 972                                 break;
 973                         req->data[0] = PMU_SET_RTC;
 974                         req->nbytes = 5;
 975                         for (i = 1; i <= 4; ++i)
 976                                 req->data[i] = req->data[i+1];
 977                         req->reply_len = 3;
 978                         req->reply[0] = CUDA_PACKET;
 979                         req->reply[1] = 0;
 980                         req->reply[2] = CUDA_SET_TIME;
 981                         ret = pmu_queue_request(req);
 982                         break;
 983                 }
 984                 break;
 985         case ADB_PACKET:
 986                 if (!pmu_has_adb)
 987                         return -ENXIO;
 988                 for (i = req->nbytes - 1; i > 1; --i)
 989                         req->data[i+2] = req->data[i];
 990                 req->data[3] = req->nbytes - 2;
 991                 req->data[2] = pmu_adb_flags;
 992                 /*req->data[1] = req->data[1];*/
 993                 req->data[0] = PMU_ADB_CMD;
 994                 req->nbytes += 2;
 995                 req->reply_expected = 1;
 996                 req->reply_len = 0;
 997                 ret = pmu_queue_request(req);
 998                 break;
 999         }
1000         if (ret) {
1001                 req->complete = 1;
1002                 return ret;
1003         }
1004
1005         if (sync)
1006                 while (!req->complete)
1007                         pmu_poll();
1008
1009         return 0;
1010 }
1011
1012 /* Enable/disable autopolling */
1013 static int
1014 pmu_adb_autopoll(int devs)
1015 {
1016         struct adb_request req;
1017
1018         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1019                 return -ENXIO;
1020
1021         if (devs) {
1022                 adb_dev_map = devs;
1023                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1024                             adb_dev_map >> 8, adb_dev_map);
1025                 pmu_adb_flags = 2;
1026         } else {
1027                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1028                 pmu_adb_flags = 0;
1029         }
1030         while (!req.complete)
1031                 pmu_poll();
1032         return 0;
1033 }
1034
1035 /* Reset the ADB bus */
1036 static int
1037 pmu_adb_reset_bus(void)
1038 {
1039         struct adb_request req;
1040         int save_autopoll = adb_dev_map;
1041
1042         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1043                 return -ENXIO;
1044
1045         /* anyone got a better idea?? */
1046         pmu_adb_autopoll(0);
1047
1048         req.nbytes = 5;
1049         req.done = NULL;
1050         req.data[0] = PMU_ADB_CMD;
1051         req.data[1] = 0;
1052         req.data[2] = ADB_BUSRESET;
1053         req.data[3] = 0;
1054         req.data[4] = 0;
1055         req.reply_len = 0;
1056         req.reply_expected = 1;
1057         if (pmu_queue_request(&req) != 0) {
1058                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1059                 return -EIO;
1060         }
1061         pmu_wait_complete(&req);
1062
1063         if (save_autopoll != 0)
1064                 pmu_adb_autopoll(save_autopoll);
1065
1066         return 0;
1067 }
1068 #endif /* CONFIG_ADB */
1069
1070 /* Construct and send a pmu request */
1071 int
1072 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1073             int nbytes, ...)
1074 {
1075         va_list list;
1076         int i;
1077
1078         if (vias == NULL)
1079                 return -ENXIO;
1080
1081         if (nbytes < 0 || nbytes > 32) {
1082                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1083                 req->complete = 1;
1084                 return -EINVAL;
1085         }
1086         req->nbytes = nbytes;
1087         req->done = done;
1088         va_start(list, nbytes);
1089         for (i = 0; i < nbytes; ++i)
1090                 req->data[i] = va_arg(list, int);
1091         va_end(list);
1092         req->reply_len = 0;
1093         req->reply_expected = 0;
1094         return pmu_queue_request(req);
1095 }
1096
1097 int
1098 pmu_queue_request(struct adb_request *req)
1099 {
1100         unsigned long flags;
1101         int nsend;
1102
1103         if (via == NULL) {
1104                 req->complete = 1;
1105                 return -ENXIO;
1106         }
1107         if (req->nbytes <= 0) {
1108                 req->complete = 1;
1109                 return 0;
1110         }
1111         nsend = pmu_data_len[req->data[0]][0];
1112         if (nsend >= 0 && req->nbytes != nsend + 1) {
1113                 req->complete = 1;
1114                 return -EINVAL;
1115         }
1116
1117         req->next = NULL;
1118         req->sent = 0;
1119         req->complete = 0;
1120
1121         spin_lock_irqsave(&pmu_lock, flags);
1122         if (current_req != 0) {
1123                 last_req->next = req;
1124                 last_req = req;
1125         } else {
1126                 current_req = req;
1127                 last_req = req;
1128                 if (pmu_state == idle)
1129                         pmu_start();
1130         }
1131         spin_unlock_irqrestore(&pmu_lock, flags);
1132
1133         return 0;
1134 }
1135
1136 static inline void
1137 wait_for_ack(void)
1138 {
1139         /* Sightly increased the delay, I had one occurrence of the message
1140          * reported
1141          */
1142         int timeout = 4000;
1143         while ((in_8(&via[B]) & TACK) == 0) {
1144                 if (--timeout < 0) {
1145                         printk(KERN_ERR "PMU not responding (!ack)\n");
1146                         return;
1147                 }
1148                 udelay(10);
1149         }
1150 }
1151
1152 /* New PMU seems to be very sensitive to those timings, so we make sure
1153  * PCI is flushed immediately */
1154 static inline void
1155 send_byte(int x)
1156 {
1157         volatile unsigned char __iomem *v = via;
1158
1159         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1160         out_8(&v[SR], x);
1161         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1162         (void)in_8(&v[B]);
1163 }
1164
1165 static inline void
1166 recv_byte(void)
1167 {
1168         volatile unsigned char __iomem *v = via;
1169
1170         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1171         in_8(&v[SR]);           /* resets SR */
1172         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1173         (void)in_8(&v[B]);
1174 }
1175
1176 static inline void
1177 pmu_done(struct adb_request *req)
1178 {
1179         void (*done)(struct adb_request *) = req->done;
1180         mb();
1181         req->complete = 1;
1182         /* Here, we assume that if the request has a done member, the
1183          * struct request will survive to setting req->complete to 1
1184          */
1185         if (done)
1186                 (*done)(req);
1187 }
1188
1189 static void
1190 pmu_start(void)
1191 {
1192         struct adb_request *req;
1193
1194         /* assert pmu_state == idle */
1195         /* get the packet to send */
1196         req = current_req;
1197         if (req == 0 || pmu_state != idle
1198             || (/*req->reply_expected && */req_awaiting_reply))
1199                 return;
1200
1201         pmu_state = sending;
1202         data_index = 1;
1203         data_len = pmu_data_len[req->data[0]][0];
1204
1205         /* Sounds safer to make sure ACK is high before writing. This helped
1206          * kill a problem with ADB and some iBooks
1207          */
1208         wait_for_ack();
1209         /* set the shift register to shift out and send a byte */
1210         send_byte(req->data[0]);
1211 }
1212
1213 void
1214 pmu_poll(void)
1215 {
1216         if (!via)
1217                 return;
1218         if (disable_poll)
1219                 return;
1220         via_pmu_interrupt(0, NULL);
1221 }
1222
1223 void
1224 pmu_poll_adb(void)
1225 {
1226         if (!via)
1227                 return;
1228         if (disable_poll)
1229                 return;
1230         /* Kicks ADB read when PMU is suspended */
1231         adb_int_pending = 1;
1232         do {
1233                 via_pmu_interrupt(0, NULL);
1234         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1235                 || req_awaiting_reply));
1236 }
1237
1238 void
1239 pmu_wait_complete(struct adb_request *req)
1240 {
1241         if (!via)
1242                 return;
1243         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1244                 via_pmu_interrupt(0, NULL);
1245 }
1246
1247 /* This function loops until the PMU is idle and prevents it from
1248  * anwsering to ADB interrupts. pmu_request can still be called.
1249  * This is done to avoid spurrious shutdowns when we know we'll have
1250  * interrupts switched off for a long time
1251  */
1252 void
1253 pmu_suspend(void)
1254 {
1255         unsigned long flags;
1256
1257         if (!via)
1258                 return;
1259
1260         spin_lock_irqsave(&pmu_lock, flags);
1261         pmu_suspended++;
1262         if (pmu_suspended > 1) {
1263                 spin_unlock_irqrestore(&pmu_lock, flags);
1264                 return;
1265         }
1266
1267         do {
1268                 spin_unlock_irqrestore(&pmu_lock, flags);
1269                 if (req_awaiting_reply)
1270                         adb_int_pending = 1;
1271                 via_pmu_interrupt(0, NULL);
1272                 spin_lock_irqsave(&pmu_lock, flags);
1273                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1274                         if (gpio_irq >= 0)
1275                                 disable_irq_nosync(gpio_irq);
1276                         out_8(&via[IER], CB1_INT | IER_CLR);
1277                         spin_unlock_irqrestore(&pmu_lock, flags);
1278                         break;
1279                 }
1280         } while (1);
1281 }
1282
1283 void
1284 pmu_resume(void)
1285 {
1286         unsigned long flags;
1287
1288         if (!via || (pmu_suspended < 1))
1289                 return;
1290
1291         spin_lock_irqsave(&pmu_lock, flags);
1292         pmu_suspended--;
1293         if (pmu_suspended > 0) {
1294                 spin_unlock_irqrestore(&pmu_lock, flags);
1295                 return;
1296         }
1297         adb_int_pending = 1;
1298         if (gpio_irq >= 0)
1299                 enable_irq(gpio_irq);
1300         out_8(&via[IER], CB1_INT | IER_SET);
1301         spin_unlock_irqrestore(&pmu_lock, flags);
1302         pmu_poll();
1303 }
1304
1305 /* Interrupt data could be the result data from an ADB cmd */
1306 static void
1307 pmu_handle_data(unsigned char *data, int len)
1308 {
1309         unsigned char ints, pirq;
1310         int i = 0;
1311
1312         asleep = 0;
1313         if (drop_interrupts || len < 1) {
1314                 adb_int_pending = 0;
1315                 pmu_irq_stats[8]++;
1316                 return;
1317         }
1318
1319         /* Get PMU interrupt mask */
1320         ints = data[0];
1321
1322         /* Record zero interrupts for stats */
1323         if (ints == 0)
1324                 pmu_irq_stats[9]++;
1325
1326         /* Hack to deal with ADB autopoll flag */
1327         if (ints & PMU_INT_ADB)
1328                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1329
1330 next:
1331
1332         if (ints == 0) {
1333                 if (i > pmu_irq_stats[10])
1334                         pmu_irq_stats[10] = i;
1335                 return;
1336         }
1337
1338         for (pirq = 0; pirq < 8; pirq++)
1339                 if (ints & (1 << pirq))
1340                         break;
1341         pmu_irq_stats[pirq]++;
1342         i++;
1343         ints &= ~(1 << pirq);
1344
1345         /* Note: for some reason, we get an interrupt with len=1,
1346          * data[0]==0 after each normal ADB interrupt, at least
1347          * on the Pismo. Still investigating...  --BenH
1348          */
1349         if ((1 << pirq) & PMU_INT_ADB) {
1350                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1351                         struct adb_request *req = req_awaiting_reply;
1352                         if (req == 0) {
1353                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1354                                 return;
1355                         }
1356                         req_awaiting_reply = NULL;
1357                         if (len <= 2)
1358                                 req->reply_len = 0;
1359                         else {
1360                                 memcpy(req->reply, data + 1, len - 1);
1361                                 req->reply_len = len - 1;
1362                         }
1363                         pmu_done(req);
1364                 } else {
1365                         if (len == 4 && data[1] == 0x2c) {
1366                                 extern int xmon_wants_key, xmon_adb_keycode;
1367                                 if (xmon_wants_key) {
1368                                         xmon_adb_keycode = data[2];
1369                                         return;
1370                                 }
1371                         }
1372 #ifdef CONFIG_ADB
1373                         /*
1374                          * XXX On the [23]400 the PMU gives us an up
1375                          * event for keycodes 0x74 or 0x75 when the PC
1376                          * card eject buttons are released, so we
1377                          * ignore those events.
1378                          */
1379                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1380                               && data[1] == 0x2c && data[3] == 0xff
1381                               && (data[2] & ~1) == 0xf4))
1382                                 adb_input(data+1, len-1, 1);
1383 #endif /* CONFIG_ADB */
1384                 }
1385         }
1386         /* Sound/brightness button pressed */
1387         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1388 #ifdef CONFIG_PMAC_BACKLIGHT
1389                 if (len == 3)
1390                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1391 #endif
1392         }
1393         /* Tick interrupt */
1394         else if ((1 << pirq) & PMU_INT_TICK) {
1395                 /* Environement or tick interrupt, query batteries */
1396                 if (pmu_battery_count) {
1397                         if ((--query_batt_timer) == 0) {
1398                                 query_battery_state();
1399                                 query_batt_timer = BATTERY_POLLING_COUNT;
1400                         }
1401                 }
1402         }
1403         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1404                 if (pmu_battery_count)
1405                         query_battery_state();
1406                 pmu_pass_intr(data, len);
1407                 /* len == 6 is probably a bad check. But how do I
1408                  * know what PMU versions send what events here? */
1409                 if (len == 6) {
1410                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1411                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1412                 }
1413         } else {
1414                pmu_pass_intr(data, len);
1415         }
1416         goto next;
1417 }
1418
1419 static struct adb_request*
1420 pmu_sr_intr(void)
1421 {
1422         struct adb_request *req;
1423         int bite = 0;
1424
1425         if (via[B] & TREQ) {
1426                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1427                 out_8(&via[IFR], SR_INT);
1428                 return NULL;
1429         }
1430         /* The ack may not yet be low when we get the interrupt */
1431         while ((in_8(&via[B]) & TACK) != 0)
1432                         ;
1433
1434         /* if reading grab the byte, and reset the interrupt */
1435         if (pmu_state == reading || pmu_state == reading_intr)
1436                 bite = in_8(&via[SR]);
1437
1438         /* reset TREQ and wait for TACK to go high */
1439         out_8(&via[B], in_8(&via[B]) | TREQ);
1440         wait_for_ack();
1441
1442         switch (pmu_state) {
1443         case sending:
1444                 req = current_req;
1445                 if (data_len < 0) {
1446                         data_len = req->nbytes - 1;
1447                         send_byte(data_len);
1448                         break;
1449                 }
1450                 if (data_index <= data_len) {
1451                         send_byte(req->data[data_index++]);
1452                         break;
1453                 }
1454                 req->sent = 1;
1455                 data_len = pmu_data_len[req->data[0]][1];
1456                 if (data_len == 0) {
1457                         pmu_state = idle;
1458                         current_req = req->next;
1459                         if (req->reply_expected)
1460                                 req_awaiting_reply = req;
1461                         else
1462                                 return req;
1463                 } else {
1464                         pmu_state = reading;
1465                         data_index = 0;
1466                         reply_ptr = req->reply + req->reply_len;
1467                         recv_byte();
1468                 }
1469                 break;
1470
1471         case intack:
1472                 data_index = 0;
1473                 data_len = -1;
1474                 pmu_state = reading_intr;
1475                 reply_ptr = interrupt_data[int_data_last];
1476                 recv_byte();
1477                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1478                         enable_irq(gpio_irq);
1479                         gpio_irq_enabled = 1;
1480                 }
1481                 break;
1482
1483         case reading:
1484         case reading_intr:
1485                 if (data_len == -1) {
1486                         data_len = bite;
1487                         if (bite > 32)
1488                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1489                 } else if (data_index < 32) {
1490                         reply_ptr[data_index++] = bite;
1491                 }
1492                 if (data_index < data_len) {
1493                         recv_byte();
1494                         break;
1495                 }
1496
1497                 if (pmu_state == reading_intr) {
1498                         pmu_state = idle;
1499                         int_data_state[int_data_last] = int_data_ready;
1500                         interrupt_data_len[int_data_last] = data_len;
1501                 } else {
1502                         req = current_req;
1503                         /*
1504                          * For PMU sleep and freq change requests, we lock the
1505                          * PMU until it's explicitly unlocked. This avoids any
1506                          * spurrious event polling getting in
1507                          */
1508                         current_req = req->next;
1509                         req->reply_len += data_index;
1510                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1511                                 pmu_state = locked;
1512                         else
1513                                 pmu_state = idle;
1514                         return req;
1515                 }
1516                 break;
1517
1518         default:
1519                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1520                        pmu_state);
1521         }
1522         return NULL;
1523 }
1524
1525 static irqreturn_t
1526 via_pmu_interrupt(int irq, void *arg)
1527 {
1528         unsigned long flags;
1529         int intr;
1530         int nloop = 0;
1531         int int_data = -1;
1532         struct adb_request *req = NULL;
1533         int handled = 0;
1534
1535         /* This is a bit brutal, we can probably do better */
1536         spin_lock_irqsave(&pmu_lock, flags);
1537         ++disable_poll;
1538
1539         for (;;) {
1540                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1541                 if (intr == 0)
1542                         break;
1543                 handled = 1;
1544                 if (++nloop > 1000) {
1545                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1546                                "intr=%x, ier=%x pmu_state=%d\n",
1547                                intr, in_8(&via[IER]), pmu_state);
1548                         break;
1549                 }
1550                 out_8(&via[IFR], intr);
1551                 if (intr & CB1_INT) {
1552                         adb_int_pending = 1;
1553                         pmu_irq_stats[0]++;
1554                 }
1555                 if (intr & SR_INT) {
1556                         req = pmu_sr_intr();
1557                         if (req)
1558                                 break;
1559                 }
1560         }
1561
1562 recheck:
1563         if (pmu_state == idle) {
1564                 if (adb_int_pending) {
1565                         if (int_data_state[0] == int_data_empty)
1566                                 int_data_last = 0;
1567                         else if (int_data_state[1] == int_data_empty)
1568                                 int_data_last = 1;
1569                         else
1570                                 goto no_free_slot;
1571                         pmu_state = intack;
1572                         int_data_state[int_data_last] = int_data_fill;
1573                         /* Sounds safer to make sure ACK is high before writing.
1574                          * This helped kill a problem with ADB and some iBooks
1575                          */
1576                         wait_for_ack();
1577                         send_byte(PMU_INT_ACK);
1578                         adb_int_pending = 0;
1579                 } else if (current_req)
1580                         pmu_start();
1581         }
1582 no_free_slot:
1583         /* Mark the oldest buffer for flushing */
1584         if (int_data_state[!int_data_last] == int_data_ready) {
1585                 int_data_state[!int_data_last] = int_data_flush;
1586                 int_data = !int_data_last;
1587         } else if (int_data_state[int_data_last] == int_data_ready) {
1588                 int_data_state[int_data_last] = int_data_flush;
1589                 int_data = int_data_last;
1590         }
1591         --disable_poll;
1592         spin_unlock_irqrestore(&pmu_lock, flags);
1593
1594         /* Deal with completed PMU requests outside of the lock */
1595         if (req) {
1596                 pmu_done(req);
1597                 req = NULL;
1598         }
1599
1600         /* Deal with interrupt datas outside of the lock */
1601         if (int_data >= 0) {
1602                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1603                 spin_lock_irqsave(&pmu_lock, flags);
1604                 ++disable_poll;
1605                 int_data_state[int_data] = int_data_empty;
1606                 int_data = -1;
1607                 goto recheck;
1608         }
1609
1610         return IRQ_RETVAL(handled);
1611 }
1612
1613 void
1614 pmu_unlock(void)
1615 {
1616         unsigned long flags;
1617
1618         spin_lock_irqsave(&pmu_lock, flags);
1619         if (pmu_state == locked)
1620                 pmu_state = idle;
1621         adb_int_pending = 1;
1622         spin_unlock_irqrestore(&pmu_lock, flags);
1623 }
1624
1625
1626 static irqreturn_t
1627 gpio1_interrupt(int irq, void *arg)
1628 {
1629         unsigned long flags;
1630
1631         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1632                 spin_lock_irqsave(&pmu_lock, flags);
1633                 if (gpio_irq_enabled > 0) {
1634                         disable_irq_nosync(gpio_irq);
1635                         gpio_irq_enabled = 0;
1636                 }
1637                 pmu_irq_stats[1]++;
1638                 adb_int_pending = 1;
1639                 spin_unlock_irqrestore(&pmu_lock, flags);
1640                 via_pmu_interrupt(0, NULL);
1641                 return IRQ_HANDLED;
1642         }
1643         return IRQ_NONE;
1644 }
1645
1646 void
1647 pmu_enable_irled(int on)
1648 {
1649         struct adb_request req;
1650
1651         if (vias == NULL)
1652                 return ;
1653         if (pmu_kind == PMU_KEYLARGO_BASED)
1654                 return ;
1655
1656         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1657             (on ? PMU_POW_ON : PMU_POW_OFF));
1658         pmu_wait_complete(&req);
1659 }
1660
1661 void
1662 pmu_restart(void)
1663 {
1664         struct adb_request req;
1665
1666         if (via == NULL)
1667                 return;
1668
1669         local_irq_disable();
1670
1671         drop_interrupts = 1;
1672
1673         if (pmu_kind != PMU_KEYLARGO_BASED) {
1674                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1675                                                 PMU_INT_TICK );
1676                 while(!req.complete)
1677                         pmu_poll();
1678         }
1679
1680         pmu_request(&req, NULL, 1, PMU_RESET);
1681         pmu_wait_complete(&req);
1682         for (;;)
1683                 ;
1684 }
1685
1686 void
1687 pmu_shutdown(void)
1688 {
1689         struct adb_request req;
1690
1691         if (via == NULL)
1692                 return;
1693
1694         local_irq_disable();
1695
1696         drop_interrupts = 1;
1697
1698         if (pmu_kind != PMU_KEYLARGO_BASED) {
1699                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1700                                                 PMU_INT_TICK );
1701                 pmu_wait_complete(&req);
1702         } else {
1703                 /* Disable server mode on shutdown or we'll just
1704                  * wake up again
1705                  */
1706                 pmu_set_server_mode(0);
1707         }
1708
1709         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1710                     'M', 'A', 'T', 'T');
1711         pmu_wait_complete(&req);
1712         for (;;)
1713                 ;
1714 }
1715
1716 int
1717 pmu_present(void)
1718 {
1719         return via != 0;
1720 }
1721
1722 #ifdef CONFIG_PM_SLEEP
1723
1724 static LIST_HEAD(sleep_notifiers);
1725
1726 int
1727 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
1728 {
1729         struct list_head *list;
1730         struct pmu_sleep_notifier *notifier;
1731
1732         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1733              list = list->next) {
1734                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1735                 if (n->priority > notifier->priority)
1736                         break;
1737         }
1738         __list_add(&n->list, list->prev, list);
1739         return 0;
1740 }
1741 EXPORT_SYMBOL(pmu_register_sleep_notifier);
1742
1743 int
1744 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
1745 {
1746         if (n->list.next == 0)
1747                 return -ENOENT;
1748         list_del(&n->list);
1749         n->list.next = NULL;
1750         return 0;
1751 }
1752 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
1753 #endif /* CONFIG_PM_SLEEP */
1754
1755 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
1756
1757 /* Sleep is broadcast last-to-first */
1758 static void broadcast_sleep(int when)
1759 {
1760         struct list_head *list;
1761         struct pmu_sleep_notifier *notifier;
1762
1763         for (list = sleep_notifiers.prev; list != &sleep_notifiers;
1764              list = list->prev) {
1765                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1766                 notifier->notifier_call(notifier, when);
1767         }
1768 }
1769
1770 /* Wake is broadcast first-to-last */
1771 static void broadcast_wake(void)
1772 {
1773         struct list_head *list;
1774         struct pmu_sleep_notifier *notifier;
1775
1776         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1777              list = list->next) {
1778                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1779                 notifier->notifier_call(notifier, PBOOK_WAKE);
1780         }
1781 }
1782
1783 /*
1784  * This struct is used to store config register values for
1785  * PCI devices which may get powered off when we sleep.
1786  */
1787 static struct pci_save {
1788         u16     command;
1789         u16     cache_lat;
1790         u16     intr;
1791         u32     rom_address;
1792 } *pbook_pci_saves;
1793 static int pbook_npci_saves;
1794
1795 static void
1796 pbook_alloc_pci_save(void)
1797 {
1798         int npci;
1799         struct pci_dev *pd = NULL;
1800
1801         npci = 0;
1802         while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1803                 ++npci;
1804         }
1805         if (npci == 0)
1806                 return;
1807         pbook_pci_saves = (struct pci_save *)
1808                 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
1809         pbook_npci_saves = npci;
1810 }
1811
1812 static void
1813 pbook_free_pci_save(void)
1814 {
1815         if (pbook_pci_saves == NULL)
1816                 return;
1817         kfree(pbook_pci_saves);
1818         pbook_pci_saves = NULL;
1819         pbook_npci_saves = 0;
1820 }
1821
1822 static void
1823 pbook_pci_save(void)
1824 {
1825         struct pci_save *ps = pbook_pci_saves;
1826         struct pci_dev *pd = NULL;
1827         int npci = pbook_npci_saves;
1828
1829         if (ps == NULL)
1830                 return;
1831
1832         while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1833                 if (npci-- == 0) {
1834                         pci_dev_put(pd);
1835                         return;
1836                 }
1837                 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
1838                 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
1839                 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
1840                 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
1841                 ++ps;
1842         }
1843 }
1844
1845 /* For this to work, we must take care of a few things: If gmac was enabled
1846  * during boot, it will be in the pci dev list. If it's disabled at this point
1847  * (and it will probably be), then you can't access it's config space.
1848  */
1849 static void
1850 pbook_pci_restore(void)
1851 {
1852         u16 cmd;
1853         struct pci_save *ps = pbook_pci_saves - 1;
1854         struct pci_dev *pd = NULL;
1855         int npci = pbook_npci_saves;
1856         int j;
1857
1858         while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1859                 if (npci-- == 0)
1860                         return;
1861                 ps++;
1862                 if (ps->command == 0)
1863                         continue;
1864                 pci_read_config_word(pd, PCI_COMMAND, &cmd);
1865                 if ((ps->command & ~cmd) == 0)
1866                         continue;
1867                 switch (pd->hdr_type) {
1868                 case PCI_HEADER_TYPE_NORMAL:
1869                         for (j = 0; j < 6; ++j)
1870                                 pci_write_config_dword(pd,
1871                                         PCI_BASE_ADDRESS_0 + j*4,
1872                                         pd->resource[j].start);
1873                         pci_write_config_dword(pd, PCI_ROM_ADDRESS,
1874                                 ps->rom_address);
1875                         pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
1876                                 ps->cache_lat);
1877                         pci_write_config_word(pd, PCI_INTERRUPT_LINE,
1878                                 ps->intr);
1879                         pci_write_config_word(pd, PCI_COMMAND, ps->command);
1880                         break;
1881                 }
1882         }
1883 }
1884
1885 #ifdef DEBUG_SLEEP
1886 /* N.B. This doesn't work on the 3400 */
1887 void
1888 pmu_blink(int n)
1889 {
1890         struct adb_request req;
1891
1892         memset(&req, 0, sizeof(req));
1893
1894         for (; n > 0; --n) {
1895                 req.nbytes = 4;
1896                 req.done = NULL;
1897                 req.data[0] = 0xee;
1898                 req.data[1] = 4;
1899                 req.data[2] = 0;
1900                 req.data[3] = 1;
1901                 req.reply[0] = ADB_RET_OK;
1902                 req.reply_len = 1;
1903                 req.reply_expected = 0;
1904                 pmu_polled_request(&req);
1905                 mdelay(50);
1906                 req.nbytes = 4;
1907                 req.done = NULL;
1908                 req.data[0] = 0xee;
1909                 req.data[1] = 4;
1910                 req.data[2] = 0;
1911                 req.data[3] = 0;
1912                 req.reply[0] = ADB_RET_OK;
1913                 req.reply_len = 1;
1914                 req.reply_expected = 0;
1915                 pmu_polled_request(&req);
1916                 mdelay(50);
1917         }
1918         mdelay(50);
1919 }
1920 #endif
1921
1922 /*
1923  * Put the powerbook to sleep.
1924  */
1925
1926 static u32 save_via[8];
1927
1928 static void
1929 save_via_state(void)
1930 {
1931         save_via[0] = in_8(&via[ANH]);
1932         save_via[1] = in_8(&via[DIRA]);
1933         save_via[2] = in_8(&via[B]);
1934         save_via[3] = in_8(&via[DIRB]);
1935         save_via[4] = in_8(&via[PCR]);
1936         save_via[5] = in_8(&via[ACR]);
1937         save_via[6] = in_8(&via[T1CL]);
1938         save_via[7] = in_8(&via[T1CH]);
1939 }
1940 static void
1941 restore_via_state(void)
1942 {
1943         out_8(&via[ANH], save_via[0]);
1944         out_8(&via[DIRA], save_via[1]);
1945         out_8(&via[B], save_via[2]);
1946         out_8(&via[DIRB], save_via[3]);
1947         out_8(&via[PCR], save_via[4]);
1948         out_8(&via[ACR], save_via[5]);
1949         out_8(&via[T1CL], save_via[6]);
1950         out_8(&via[T1CH], save_via[7]);
1951         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
1952         out_8(&via[IFR], 0x7f);                         /* clear IFR */
1953         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1954 }
1955
1956 extern void pmu_backlight_set_sleep(int sleep);
1957
1958 static int
1959 pmac_suspend_devices(void)
1960 {
1961         int ret;
1962
1963         pm_prepare_console();
1964
1965         /* Notify old-style device drivers */
1966         broadcast_sleep(PBOOK_SLEEP_REQUEST);
1967
1968         /* Sync the disks. */
1969         /* XXX It would be nice to have some way to ensure that
1970          * nobody is dirtying any new buffers while we wait. That
1971          * could be achieved using the refrigerator for processes
1972          * that swsusp uses
1973          */
1974         sys_sync();
1975
1976         broadcast_sleep(PBOOK_SLEEP_NOW);
1977
1978         /* Send suspend call to devices, hold the device core's dpm_sem */
1979         ret = device_suspend(PMSG_SUSPEND);
1980         if (ret) {
1981                 broadcast_wake();
1982                 printk(KERN_ERR "Driver sleep failed\n");
1983                 return -EBUSY;
1984         }
1985
1986 #ifdef CONFIG_PMAC_BACKLIGHT
1987         /* Tell backlight code not to muck around with the chip anymore */
1988         pmu_backlight_set_sleep(1);
1989 #endif
1990
1991         /* Call platform functions marked "on sleep" */
1992         pmac_pfunc_i2c_suspend();
1993         pmac_pfunc_base_suspend();
1994
1995         /* Stop preemption */
1996         preempt_disable();
1997
1998         /* Make sure the decrementer won't interrupt us */
1999         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2000         /* Make sure any pending DEC interrupt occurring while we did
2001          * the above didn't re-enable the DEC */
2002         mb();
2003         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2004
2005         /* We can now disable MSR_EE. This code of course works properly only
2006          * on UP machines... For SMP, if we ever implement sleep, we'll have to
2007          * stop the "other" CPUs way before we do all that stuff.
2008          */
2009         local_irq_disable();
2010
2011         /* Broadcast power down irq
2012          * This isn't that useful in most cases (only directly wired devices can
2013          * use this but still... This will take care of sysdev's as well, so
2014          * we exit from here with local irqs disabled and PIC off.
2015          */
2016         ret = device_power_down(PMSG_SUSPEND);
2017         if (ret) {
2018                 wakeup_decrementer();
2019                 local_irq_enable();
2020                 preempt_enable();
2021                 device_resume();
2022                 broadcast_wake();
2023                 printk(KERN_ERR "Driver powerdown failed\n");
2024                 return -EBUSY;
2025         }
2026
2027         /* Wait for completion of async requests */
2028         while (!batt_req.complete)
2029                 pmu_poll();
2030
2031         /* Giveup the lazy FPU & vec so we don't have to back them
2032          * up from the low level code
2033          */
2034         enable_kernel_fp();
2035
2036 #ifdef CONFIG_ALTIVEC
2037         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2038                 enable_kernel_altivec();
2039 #endif /* CONFIG_ALTIVEC */
2040
2041         return 0;
2042 }
2043
2044 static int
2045 pmac_wakeup_devices(void)
2046 {
2047         mdelay(100);
2048
2049 #ifdef CONFIG_PMAC_BACKLIGHT
2050         /* Tell backlight code it can use the chip again */
2051         pmu_backlight_set_sleep(0);
2052 #endif
2053
2054         /* Power back up system devices (including the PIC) */
2055         device_power_up();
2056
2057         /* Force a poll of ADB interrupts */
2058         adb_int_pending = 1;
2059         via_pmu_interrupt(0, NULL);
2060
2061         /* Restart jiffies & scheduling */
2062         wakeup_decrementer();
2063
2064         /* Re-enable local CPU interrupts */
2065         local_irq_enable();
2066         mdelay(10);
2067         preempt_enable();
2068
2069         /* Call platform functions marked "on wake" */
2070         pmac_pfunc_base_resume();
2071         pmac_pfunc_i2c_resume();
2072
2073         /* Resume devices */
2074         device_resume();
2075
2076         /* Notify old style drivers */
2077         broadcast_wake();
2078
2079         pm_restore_console();
2080
2081         return 0;
2082 }
2083
2084 #define GRACKLE_PM      (1<<7)
2085 #define GRACKLE_DOZE    (1<<5)
2086 #define GRACKLE_NAP     (1<<4)
2087 #define GRACKLE_SLEEP   (1<<3)
2088
2089 static int powerbook_sleep_grackle(void)
2090 {
2091         unsigned long save_l2cr;
2092         unsigned short pmcr1;
2093         struct adb_request req;
2094         int ret;
2095         struct pci_dev *grackle;
2096
2097         grackle = pci_get_bus_and_slot(0, 0);
2098         if (!grackle)
2099                 return -ENODEV;
2100
2101         ret = pmac_suspend_devices();
2102         if (ret) {
2103                 printk(KERN_ERR "Sleep rejected by devices\n");
2104                 return ret;
2105         }
2106
2107         /* Turn off various things. Darwin does some retry tests here... */
2108         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2109         pmu_wait_complete(&req);
2110         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2111                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2112         pmu_wait_complete(&req);
2113
2114         /* For 750, save backside cache setting and disable it */
2115         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2116
2117         if (!__fake_sleep) {
2118                 /* Ask the PMU to put us to sleep */
2119                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2120                 pmu_wait_complete(&req);
2121         }
2122
2123         /* The VIA is supposed not to be restored correctly*/
2124         save_via_state();
2125         /* We shut down some HW */
2126         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2127
2128         pci_read_config_word(grackle, 0x70, &pmcr1);
2129         /* Apparently, MacOS uses NAP mode for Grackle ??? */
2130         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2131         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2132         pci_write_config_word(grackle, 0x70, pmcr1);
2133
2134         /* Call low-level ASM sleep handler */
2135         if (__fake_sleep)
2136                 mdelay(5000);
2137         else
2138                 low_sleep_handler();
2139
2140         /* We're awake again, stop grackle PM */
2141         pci_read_config_word(grackle, 0x70, &pmcr1);
2142         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2143         pci_write_config_word(grackle, 0x70, pmcr1);
2144
2145         pci_dev_put(grackle);
2146
2147         /* Make sure the PMU is idle */
2148         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2149         restore_via_state();
2150
2151         /* Restore L2 cache */
2152         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2153                 _set_L2CR(save_l2cr);
2154
2155         /* Restore userland MMU context */
2156         set_context(current->active_mm->context.id, current->active_mm->pgd);
2157
2158         /* Power things up */
2159         pmu_unlock();
2160         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2161         pmu_wait_complete(&req);
2162         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2163                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2164         pmu_wait_complete(&req);
2165         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2166                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2167         pmu_wait_complete(&req);
2168
2169         pmac_wakeup_devices();
2170
2171         return 0;
2172 }
2173
2174 static int
2175 powerbook_sleep_Core99(void)
2176 {
2177         unsigned long save_l2cr;
2178         unsigned long save_l3cr;
2179         struct adb_request req;
2180         int ret;
2181
2182         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2183                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2184                 return -ENOSYS;
2185         }
2186
2187         if (num_online_cpus() > 1 || cpu_is_offline(0))
2188                 return -EAGAIN;
2189
2190         ret = pmac_suspend_devices();
2191         if (ret) {
2192                 printk(KERN_ERR "Sleep rejected by devices\n");
2193                 return ret;
2194         }
2195
2196         /* Stop environment and ADB interrupts */
2197         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2198         pmu_wait_complete(&req);
2199
2200         /* Tell PMU what events will wake us up */
2201         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2202                 0xff, 0xff);
2203         pmu_wait_complete(&req);
2204         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2205                 0, PMU_PWR_WAKEUP_KEY |
2206                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2207         pmu_wait_complete(&req);
2208
2209         /* Save the state of the L2 and L3 caches */
2210         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
2211         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2212
2213         if (!__fake_sleep) {
2214                 /* Ask the PMU to put us to sleep */
2215                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2216                 pmu_wait_complete(&req);
2217         }
2218
2219         /* The VIA is supposed not to be restored correctly*/
2220         save_via_state();
2221
2222         /* Shut down various ASICs. There's a chance that we can no longer
2223          * talk to the PMU after this, so I moved it to _after_ sending the
2224          * sleep command to it. Still need to be checked.
2225          */
2226         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2227
2228         /* Call low-level ASM sleep handler */
2229         if (__fake_sleep)
2230                 mdelay(5000);
2231         else
2232                 low_sleep_handler();
2233
2234         /* Restore Apple core ASICs state */
2235         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2236
2237         /* Restore VIA */
2238         restore_via_state();
2239
2240         /* tweak LPJ before cpufreq is there */
2241         loops_per_jiffy *= 2;
2242
2243         /* Restore video */
2244         pmac_call_early_video_resume();
2245
2246         /* Restore L2 cache */
2247         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2248                 _set_L2CR(save_l2cr);
2249         /* Restore L3 cache */
2250         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2251                 _set_L3CR(save_l3cr);
2252
2253         /* Restore userland MMU context */
2254         set_context(current->active_mm->context.id, current->active_mm->pgd);
2255
2256         /* Tell PMU we are ready */
2257         pmu_unlock();
2258         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2259         pmu_wait_complete(&req);
2260         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2261         pmu_wait_complete(&req);
2262
2263         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2264         loops_per_jiffy /= 2;
2265
2266         pmac_wakeup_devices();
2267
2268         return 0;
2269 }
2270
2271 #define PB3400_MEM_CTRL         0xf8000000
2272 #define PB3400_MEM_CTRL_SLEEP   0x70
2273
2274 static int
2275 powerbook_sleep_3400(void)
2276 {
2277         int ret, i, x;
2278         unsigned int hid0;
2279         unsigned long p;
2280         struct adb_request sleep_req;
2281         void __iomem *mem_ctrl;
2282         unsigned int __iomem *mem_ctrl_sleep;
2283
2284         /* first map in the memory controller registers */
2285         mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2286         if (mem_ctrl == NULL) {
2287                 printk("powerbook_sleep_3400: ioremap failed\n");
2288                 return -ENOMEM;
2289         }
2290         mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2291
2292         /* Allocate room for PCI save */
2293         pbook_alloc_pci_save();
2294
2295         ret = pmac_suspend_devices();
2296         if (ret) {
2297                 pbook_free_pci_save();
2298                 printk(KERN_ERR "Sleep rejected by devices\n");
2299                 return ret;
2300         }
2301
2302         /* Save the state of PCI config space for some slots */
2303         pbook_pci_save();
2304
2305         /* Set the memory controller to keep the memory refreshed
2306            while we're asleep */
2307         for (i = 0x403f; i >= 0x4000; --i) {
2308                 out_be32(mem_ctrl_sleep, i);
2309                 do {
2310                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2311                 } while (x == 0);
2312                 if (x >= 0x100)
2313                         break;
2314         }
2315
2316         /* Ask the PMU to put us to sleep */
2317         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2318         while (!sleep_req.complete)
2319                 mb();
2320
2321         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2322
2323         /* displacement-flush the L2 cache - necessary? */
2324         for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2325                 i = *(volatile int *)p;
2326         asleep = 1;
2327
2328         /* Put the CPU into sleep mode */
2329         hid0 = mfspr(SPRN_HID0);
2330         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2331         mtspr(SPRN_HID0, hid0);
2332         mtmsr(mfmsr() | MSR_POW | MSR_EE);
2333         udelay(10);
2334
2335         /* OK, we're awake again, start restoring things */
2336         out_be32(mem_ctrl_sleep, 0x3f);
2337         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2338         pbook_pci_restore();
2339         pmu_unlock();
2340
2341         /* wait for the PMU interrupt sequence to complete */
2342         while (asleep)
2343                 mb();
2344
2345         pmac_wakeup_devices();
2346         pbook_free_pci_save();
2347         iounmap(mem_ctrl);
2348
2349         return 0;
2350 }
2351
2352 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */
2353
2354 /*
2355  * Support for /dev/pmu device
2356  */
2357 #define RB_SIZE         0x10
2358 struct pmu_private {
2359         struct list_head list;
2360         int     rb_get;
2361         int     rb_put;
2362         struct rb_entry {
2363                 unsigned short len;
2364                 unsigned char data[16];
2365         }       rb_buf[RB_SIZE];
2366         wait_queue_head_t wait;
2367         spinlock_t lock;
2368 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2369         int     backlight_locker;
2370 #endif
2371 };
2372
2373 static LIST_HEAD(all_pmu_pvt);
2374 static DEFINE_SPINLOCK(all_pvt_lock);
2375
2376 static void
2377 pmu_pass_intr(unsigned char *data, int len)
2378 {
2379         struct pmu_private *pp;
2380         struct list_head *list;
2381         int i;
2382         unsigned long flags;
2383
2384         if (len > sizeof(pp->rb_buf[0].data))
2385                 len = sizeof(pp->rb_buf[0].data);
2386         spin_lock_irqsave(&all_pvt_lock, flags);
2387         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2388                 pp = list_entry(list, struct pmu_private, list);
2389                 spin_lock(&pp->lock);
2390                 i = pp->rb_put + 1;
2391                 if (i >= RB_SIZE)
2392                         i = 0;
2393                 if (i != pp->rb_get) {
2394                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2395                         rp->len = len;
2396                         memcpy(rp->data, data, len);
2397                         pp->rb_put = i;
2398                         wake_up_interruptible(&pp->wait);
2399                 }
2400                 spin_unlock(&pp->lock);
2401         }
2402         spin_unlock_irqrestore(&all_pvt_lock, flags);
2403 }
2404
2405 static int
2406 pmu_open(struct inode *inode, struct file *file)
2407 {
2408         struct pmu_private *pp;
2409         unsigned long flags;
2410
2411         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2412         if (pp == 0)
2413                 return -ENOMEM;
2414         pp->rb_get = pp->rb_put = 0;
2415         spin_lock_init(&pp->lock);
2416         init_waitqueue_head(&pp->wait);
2417         spin_lock_irqsave(&all_pvt_lock, flags);
2418 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2419         pp->backlight_locker = 0;
2420 #endif
2421         list_add(&pp->list, &all_pmu_pvt);
2422         spin_unlock_irqrestore(&all_pvt_lock, flags);
2423         file->private_data = pp;
2424         return 0;
2425 }
2426
2427 static ssize_t
2428 pmu_read(struct file *file, char __user *buf,
2429                         size_t count, loff_t *ppos)
2430 {
2431         struct pmu_private *pp = file->private_data;
2432         DECLARE_WAITQUEUE(wait, current);
2433         unsigned long flags;
2434         int ret = 0;
2435
2436         if (count < 1 || pp == 0)
2437                 return -EINVAL;
2438         if (!access_ok(VERIFY_WRITE, buf, count))
2439                 return -EFAULT;
2440
2441         spin_lock_irqsave(&pp->lock, flags);
2442         add_wait_queue(&pp->wait, &wait);
2443         current->state = TASK_INTERRUPTIBLE;
2444
2445         for (;;) {
2446                 ret = -EAGAIN;
2447                 if (pp->rb_get != pp->rb_put) {
2448                         int i = pp->rb_get;
2449                         struct rb_entry *rp = &pp->rb_buf[i];
2450                         ret = rp->len;
2451                         spin_unlock_irqrestore(&pp->lock, flags);
2452                         if (ret > count)
2453                                 ret = count;
2454                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2455                                 ret = -EFAULT;
2456                         if (++i >= RB_SIZE)
2457                                 i = 0;
2458                         spin_lock_irqsave(&pp->lock, flags);
2459                         pp->rb_get = i;
2460                 }
2461                 if (ret >= 0)
2462                         break;
2463                 if (file->f_flags & O_NONBLOCK)
2464                         break;
2465                 ret = -ERESTARTSYS;
2466                 if (signal_pending(current))
2467                         break;
2468                 spin_unlock_irqrestore(&pp->lock, flags);
2469                 schedule();
2470                 spin_lock_irqsave(&pp->lock, flags);
2471         }
2472         current->state = TASK_RUNNING;
2473         remove_wait_queue(&pp->wait, &wait);
2474         spin_unlock_irqrestore(&pp->lock, flags);
2475
2476         return ret;
2477 }
2478
2479 static ssize_t
2480 pmu_write(struct file *file, const char __user *buf,
2481                          size_t count, loff_t *ppos)
2482 {
2483         return 0;
2484 }
2485
2486 static unsigned int
2487 pmu_fpoll(struct file *filp, poll_table *wait)
2488 {
2489         struct pmu_private *pp = filp->private_data;
2490         unsigned int mask = 0;
2491         unsigned long flags;
2492
2493         if (pp == 0)
2494                 return 0;
2495         poll_wait(filp, &pp->wait, wait);
2496         spin_lock_irqsave(&pp->lock, flags);
2497         if (pp->rb_get != pp->rb_put)
2498                 mask |= POLLIN;
2499         spin_unlock_irqrestore(&pp->lock, flags);
2500         return mask;
2501 }
2502
2503 static int
2504 pmu_release(struct inode *inode, struct file *file)
2505 {
2506         struct pmu_private *pp = file->private_data;
2507         unsigned long flags;
2508
2509         if (pp != 0) {
2510                 file->private_data = NULL;
2511                 spin_lock_irqsave(&all_pvt_lock, flags);
2512                 list_del(&pp->list);
2513                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2514
2515 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2516                 if (pp->backlight_locker)
2517                         pmac_backlight_enable();
2518 #endif
2519
2520                 kfree(pp);
2521         }
2522         return 0;
2523 }
2524
2525 static int
2526 pmu_ioctl(struct inode * inode, struct file *filp,
2527                      u_int cmd, u_long arg)
2528 {
2529         __u32 __user *argp = (__u32 __user *)arg;
2530         int error = -EINVAL;
2531
2532         switch (cmd) {
2533 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
2534         case PMU_IOC_SLEEP:
2535                 if (!capable(CAP_SYS_ADMIN))
2536                         return -EACCES;
2537                 if (sleep_in_progress)
2538                         return -EBUSY;
2539                 sleep_in_progress = 1;
2540                 switch (pmu_kind) {
2541                 case PMU_OHARE_BASED:
2542                         error = powerbook_sleep_3400();
2543                         break;
2544                 case PMU_HEATHROW_BASED:
2545                 case PMU_PADDINGTON_BASED:
2546                         error = powerbook_sleep_grackle();
2547                         break;
2548                 case PMU_KEYLARGO_BASED:
2549                         error = powerbook_sleep_Core99();
2550                         break;
2551                 default:
2552                         error = -ENOSYS;
2553                 }
2554                 sleep_in_progress = 0;
2555                 break;
2556         case PMU_IOC_CAN_SLEEP:
2557                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2558                         return put_user(0, argp);
2559                 else
2560                         return put_user(1, argp);
2561 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */
2562
2563 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2564         /* Compatibility ioctl's for backlight */
2565         case PMU_IOC_GET_BACKLIGHT:
2566         {
2567                 int brightness;
2568
2569                 if (sleep_in_progress)
2570                         return -EBUSY;
2571
2572                 brightness = pmac_backlight_get_legacy_brightness();
2573                 if (brightness < 0)
2574                         return brightness;
2575                 else
2576                         return put_user(brightness, argp);
2577
2578         }
2579         case PMU_IOC_SET_BACKLIGHT:
2580         {
2581                 int brightness;
2582
2583                 if (sleep_in_progress)
2584                         return -EBUSY;
2585
2586                 error = get_user(brightness, argp);
2587                 if (error)
2588                         return error;
2589
2590                 return pmac_backlight_set_legacy_brightness(brightness);
2591         }
2592 #ifdef CONFIG_INPUT_ADBHID
2593         case PMU_IOC_GRAB_BACKLIGHT: {
2594                 struct pmu_private *pp = filp->private_data;
2595
2596                 if (pp->backlight_locker)
2597                         return 0;
2598
2599                 pp->backlight_locker = 1;
2600                 pmac_backlight_disable();
2601
2602                 return 0;
2603         }
2604 #endif /* CONFIG_INPUT_ADBHID */
2605 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2606
2607         case PMU_IOC_GET_MODEL:
2608                 return put_user(pmu_kind, argp);
2609         case PMU_IOC_HAS_ADB:
2610                 return put_user(pmu_has_adb, argp);
2611         }
2612         return error;
2613 }
2614
2615 static const struct file_operations pmu_device_fops = {
2616         .read           = pmu_read,
2617         .write          = pmu_write,
2618         .poll           = pmu_fpoll,
2619         .ioctl          = pmu_ioctl,
2620         .open           = pmu_open,
2621         .release        = pmu_release,
2622 };
2623
2624 static struct miscdevice pmu_device = {
2625         PMU_MINOR, "pmu", &pmu_device_fops
2626 };
2627
2628 static int pmu_device_init(void)
2629 {
2630         if (!via)
2631                 return 0;
2632         if (misc_register(&pmu_device) < 0)
2633                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2634         return 0;
2635 }
2636 device_initcall(pmu_device_init);
2637
2638
2639 #ifdef DEBUG_SLEEP
2640 static inline void
2641 polled_handshake(volatile unsigned char __iomem *via)
2642 {
2643         via[B] &= ~TREQ; eieio();
2644         while ((via[B] & TACK) != 0)
2645                 ;
2646         via[B] |= TREQ; eieio();
2647         while ((via[B] & TACK) == 0)
2648                 ;
2649 }
2650
2651 static inline void
2652 polled_send_byte(volatile unsigned char __iomem *via, int x)
2653 {
2654         via[ACR] |= SR_OUT | SR_EXT; eieio();
2655         via[SR] = x; eieio();
2656         polled_handshake(via);
2657 }
2658
2659 static inline int
2660 polled_recv_byte(volatile unsigned char __iomem *via)
2661 {
2662         int x;
2663
2664         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2665         x = via[SR]; eieio();
2666         polled_handshake(via);
2667         x = via[SR]; eieio();
2668         return x;
2669 }
2670
2671 int
2672 pmu_polled_request(struct adb_request *req)
2673 {
2674         unsigned long flags;
2675         int i, l, c;
2676         volatile unsigned char __iomem *v = via;
2677
2678         req->complete = 1;
2679         c = req->data[0];
2680         l = pmu_data_len[c][0];
2681         if (l >= 0 && req->nbytes != l + 1)
2682                 return -EINVAL;
2683
2684         local_irq_save(flags);
2685         while (pmu_state != idle)
2686                 pmu_poll();
2687
2688         while ((via[B] & TACK) == 0)
2689                 ;
2690         polled_send_byte(v, c);
2691         if (l < 0) {
2692                 l = req->nbytes - 1;
2693                 polled_send_byte(v, l);
2694         }
2695         for (i = 1; i <= l; ++i)
2696                 polled_send_byte(v, req->data[i]);
2697
2698         l = pmu_data_len[c][1];
2699         if (l < 0)
2700                 l = polled_recv_byte(v);
2701         for (i = 0; i < l; ++i)
2702                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2703
2704         if (req->done)
2705                 (*req->done)(req);
2706
2707         local_irq_restore(flags);
2708         return 0;
2709 }
2710 #endif /* DEBUG_SLEEP */
2711
2712
2713 /* FIXME: This is a temporary set of callbacks to enable us
2714  * to do suspend-to-disk.
2715  */
2716
2717 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
2718
2719 int pmu_sys_suspended;
2720
2721 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2722 {
2723         if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2724                 return 0;
2725
2726         /* Suspend PMU event interrupts */
2727         pmu_suspend();
2728
2729         pmu_sys_suspended = 1;
2730         return 0;
2731 }
2732
2733 static int pmu_sys_resume(struct sys_device *sysdev)
2734 {
2735         struct adb_request req;
2736
2737         if (!pmu_sys_suspended)
2738                 return 0;
2739
2740         /* Tell PMU we are ready */
2741         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2742         pmu_wait_complete(&req);
2743
2744         /* Resume PMU event interrupts */
2745         pmu_resume();
2746
2747         pmu_sys_suspended = 0;
2748
2749         return 0;
2750 }
2751
2752 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */
2753
2754 static struct sysdev_class pmu_sysclass = {
2755         set_kset_name("pmu"),
2756 };
2757
2758 static struct sys_device device_pmu = {
2759         .cls            = &pmu_sysclass,
2760 };
2761
2762 static struct sysdev_driver driver_pmu = {
2763 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
2764         .suspend        = &pmu_sys_suspend,
2765         .resume         = &pmu_sys_resume,
2766 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */
2767 };
2768
2769 static int __init init_pmu_sysfs(void)
2770 {
2771         int rc;
2772
2773         rc = sysdev_class_register(&pmu_sysclass);
2774         if (rc) {
2775                 printk(KERN_ERR "Failed registering PMU sys class\n");
2776                 return -ENODEV;
2777         }
2778         rc = sysdev_register(&device_pmu);
2779         if (rc) {
2780                 printk(KERN_ERR "Failed registering PMU sys device\n");
2781                 return -ENODEV;
2782         }
2783         rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2784         if (rc) {
2785                 printk(KERN_ERR "Failed registering PMU sys driver\n");
2786                 return -ENODEV;
2787         }
2788         return 0;
2789 }
2790
2791 subsys_initcall(init_pmu_sysfs);
2792
2793 EXPORT_SYMBOL(pmu_request);
2794 EXPORT_SYMBOL(pmu_queue_request);
2795 EXPORT_SYMBOL(pmu_poll);
2796 EXPORT_SYMBOL(pmu_poll_adb);
2797 EXPORT_SYMBOL(pmu_wait_complete);
2798 EXPORT_SYMBOL(pmu_suspend);
2799 EXPORT_SYMBOL(pmu_resume);
2800 EXPORT_SYMBOL(pmu_unlock);
2801 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
2802 EXPORT_SYMBOL(pmu_enable_irled);
2803 EXPORT_SYMBOL(pmu_battery_count);
2804 EXPORT_SYMBOL(pmu_batteries);
2805 EXPORT_SYMBOL(pmu_power_flags);
2806 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */
2807