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  *  - Move backlight code out as well
  20  *  - Save/Restore PCI space properly
  21  *
  22  */
  23 #include <stdarg.h>
  24 #include <linux/config.h>
  25 #include <linux/types.h>
  26 #include <linux/errno.h>
  27 #include <linux/kernel.h>
  28 #include <linux/delay.h>
  29 #include <linux/sched.h>
  30 #include <linux/miscdevice.h>
  31 #include <linux/blkdev.h>
  32 #include <linux/pci.h>
  33 #include <linux/slab.h>
  34 #include <linux/poll.h>
  35 #include <linux/adb.h>
  36 #include <linux/pmu.h>
  37 #include <linux/cuda.h>
  38 #include <linux/smp_lock.h>
  39 #include <linux/module.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/pm.h>
  42 #include <linux/proc_fs.h>
  43 #include <linux/init.h>
  44 #include <linux/interrupt.h>
  45 #include <linux/device.h>
  46 #include <linux/sysdev.h>
  47 #include <linux/suspend.h>
  48 #include <linux/syscalls.h>
  49 #include <linux/cpu.h>
  50 #include <asm/prom.h>
  51 #include <asm/machdep.h>
  52 #include <asm/io.h>
  53 #include <asm/pgtable.h>
  54 #include <asm/system.h>
  55 #include <asm/sections.h>
  56 #include <asm/irq.h>
  57 #include <asm/pmac_feature.h>
  58 #include <asm/pmac_pfunc.h>
  59 #include <asm/pmac_low_i2c.h>
  60 #include <asm/uaccess.h>
  61 #include <asm/mmu_context.h>
  62 #include <asm/cputable.h>
  63 #include <asm/time.h>
  64 #ifdef CONFIG_PMAC_BACKLIGHT
  65 #include <asm/backlight.h>
  66 #endif
  67
  68 #ifdef CONFIG_PPC32
  69 #include <asm/open_pic.h>
  70 #endif
  71
  72 /* Some compile options */
  73 #undef SUSPEND_USES_PMU
  74 #define DEBUG_SLEEP
  75 #undef HACKED_PCI_SAVE
  76
  77 /* Misc minor number allocated for /dev/pmu */
  78 #define PMU_MINOR               154
  79
  80 /* How many iterations between battery polls */
  81 #define BATTERY_POLLING_COUNT   2
  82
  83 static volatile unsigned char __iomem *via;
  84
  85 /* VIA registers - spaced 0x200 bytes apart */
  86 #define RS              0x200           /* skip between registers */
  87 #define B               0               /* B-side data */
  88 #define A               RS              /* A-side data */
  89 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  90 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  91 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  92 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  93 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  94 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  95 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  96 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  97 #define SR              (10*RS)         /* Shift register */
  98 #define ACR             (11*RS)         /* Auxiliary control register */
  99 #define PCR             (12*RS)         /* Peripheral control register */
 100 #define IFR             (13*RS)         /* Interrupt flag register */
 101 #define IER             (14*RS)         /* Interrupt enable register */
 102 #define ANH             (15*RS)         /* A-side data, no handshake */
 103
 104 /* Bits in B data register: both active low */
 105 #define TACK            0x08            /* Transfer acknowledge (input) */
 106 #define TREQ            0x10            /* Transfer request (output) */
 107
 108 /* Bits in ACR */
 109 #define SR_CTRL         0x1c            /* Shift register control bits */
 110 #define SR_EXT          0x0c            /* Shift on external clock */
 111 #define SR_OUT          0x10            /* Shift out if 1 */
 112
 113 /* Bits in IFR and IER */
 114 #define IER_SET         0x80            /* set bits in IER */
 115 #define IER_CLR         0               /* clear bits in IER */
 116 #define SR_INT          0x04            /* Shift register full/empty */
 117 #define CB2_INT         0x08
 118 #define CB1_INT         0x10            /* transition on CB1 input */
 119
 120 static volatile enum pmu_state {
 121         idle,
 122         sending,
 123         intack,
 124         reading,
 125         reading_intr,
 126         locked,
 127 } pmu_state;
 128
 129 static volatile enum int_data_state {
 130         int_data_empty,
 131         int_data_fill,
 132         int_data_ready,
 133         int_data_flush
 134 } int_data_state[2] = { int_data_empty, int_data_empty };
 135
 136 static struct adb_request *current_req;
 137 static struct adb_request *last_req;
 138 static struct adb_request *req_awaiting_reply;
 139 static unsigned char interrupt_data[2][32];
 140 static int interrupt_data_len[2];
 141 static int int_data_last;
 142 static unsigned char *reply_ptr;
 143 static int data_index;
 144 static int data_len;
 145 static volatile int adb_int_pending;
 146 static volatile int disable_poll;
 147 static struct device_node *vias;
 148 static int pmu_kind = PMU_UNKNOWN;
 149 static int pmu_fully_inited = 0;
 150 static int pmu_has_adb;
 151 static struct device_node *gpio_node;
 152 static unsigned char __iomem *gpio_reg = NULL;
 153 static int gpio_irq = -1;
 154 static int gpio_irq_enabled = -1;
 155 static volatile int pmu_suspended = 0;
 156 static spinlock_t pmu_lock;
 157 static u8 pmu_intr_mask;
 158 static int pmu_version;
 159 static int drop_interrupts;
 160 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 161 static int option_lid_wakeup = 1;
 162 #endif /* CONFIG_PM && CONFIG_PPC32 */
 163 #if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT_LEGACY)
 164 static int sleep_in_progress;
 165 #endif
 166 static unsigned long async_req_locks;
 167 static unsigned int pmu_irq_stats[11];
 168
 169 static struct proc_dir_entry *proc_pmu_root;
 170 static struct proc_dir_entry *proc_pmu_info;
 171 static struct proc_dir_entry *proc_pmu_irqstats;
 172 static struct proc_dir_entry *proc_pmu_options;
 173 static int option_server_mode;
 174
 175 int pmu_battery_count;
 176 int pmu_cur_battery;
 177 unsigned int pmu_power_flags;
 178 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 179 static int query_batt_timer = BATTERY_POLLING_COUNT;
 180 static struct adb_request batt_req;
 181 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 182
 183 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
 184 extern int disable_kernel_backlight;
 185 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
 186
 187 int __fake_sleep;
 188 int asleep;
 189 BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
 190
 191 #ifdef CONFIG_ADB
 192 static int adb_dev_map = 0;
 193 static int pmu_adb_flags;
 194
 195 static int pmu_probe(void);
 196 static int pmu_init(void);
 197 static int pmu_send_request(struct adb_request *req, int sync);
 198 static int pmu_adb_autopoll(int devs);
 199 static int pmu_adb_reset_bus(void);
 200 #endif /* CONFIG_ADB */
 201
 202 static int init_pmu(void);
 203 static void pmu_start(void);
 204 static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
 205 static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
 206 static int proc_get_info(char *page, char **start, off_t off,
 207                           int count, int *eof, void *data);
 208 static int proc_get_irqstats(char *page, char **start, off_t off,
 209                           int count, int *eof, void *data);
 210 static void pmu_pass_intr(unsigned char *data, int len);
 211 static int proc_get_batt(char *page, char **start, off_t off,
 212                         int count, int *eof, void *data);
 213 static int proc_read_options(char *page, char **start, off_t off,
 214                         int count, int *eof, void *data);
 215 static int proc_write_options(struct file *file, const char __user *buffer,
 216                         unsigned long count, void *data);
 217
 218 #ifdef CONFIG_ADB
 219 struct adb_driver via_pmu_driver = {
 220         "PMU",
 221         pmu_probe,
 222         pmu_init,
 223         pmu_send_request,
 224         pmu_adb_autopoll,
 225         pmu_poll_adb,
 226         pmu_adb_reset_bus
 227 };
 228 #endif /* CONFIG_ADB */
 229
 230 extern void low_sleep_handler(void);
 231 extern void enable_kernel_altivec(void);
 232 extern void enable_kernel_fp(void);
 233
 234 #ifdef DEBUG_SLEEP
 235 int pmu_polled_request(struct adb_request *req);
 236 int pmu_wink(struct adb_request *req);
 237 #endif
 238
 239 /*
 240  * This table indicates for each PMU opcode:
 241  * - the number of data bytes to be sent with the command, or -1
 242  *   if a length byte should be sent,
 243  * - the number of response bytes which the PMU will return, or
 244  *   -1 if it will send a length byte.
 245  */
 246 static const s8 pmu_data_len[256][2] = {
 247 /*         0       1       2       3       4       5       6       7  */
 248 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 249 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 250 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 251 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 252 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 253 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 254 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 255 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 256 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 257 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 258 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 259 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 260 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 261 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 262 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 263 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 264 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 265 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 266 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 267 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 268 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 269 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 270 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 271 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 272 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 273 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 274 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 275 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 276 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 277 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 278 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 279 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 280 };
 281
 282 static char *pbook_type[] = {
 283         "Unknown PowerBook",
 284         "PowerBook 2400/3400/3500(G3)",
 285         "PowerBook G3 Series",
 286         "1999 PowerBook G3",
 287         "Core99"
 288 };
 289
 290 int __init find_via_pmu(void)
 291 {
 292         u64 taddr;
 293         u32 *reg;
 294
 295         if (via != 0)
 296                 return 1;
 297         vias = of_find_node_by_name(NULL, "via-pmu");
 298         if (vias == NULL)
 299                 return 0;
 300
 301         reg = (u32 *)get_property(vias, "reg", NULL);
 302         if (reg == NULL) {
 303                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 304                 goto fail;
 305         }
 306         taddr = of_translate_address(vias, reg);
 307         if (taddr == OF_BAD_ADDR) {
 308                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 309                 goto fail;
 310         }
 311
 312         spin_lock_init(&pmu_lock);
 313
 314         pmu_has_adb = 1;
 315
 316         pmu_intr_mask = PMU_INT_PCEJECT |
 317                         PMU_INT_SNDBRT |
 318                         PMU_INT_ADB |
 319                         PMU_INT_TICK;
 320
 321         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 322             || device_is_compatible(vias->parent, "ohare")))
 323                 pmu_kind = PMU_OHARE_BASED;
 324         else if (device_is_compatible(vias->parent, "paddington"))
 325                 pmu_kind = PMU_PADDINGTON_BASED;
 326         else if (device_is_compatible(vias->parent, "heathrow"))
 327                 pmu_kind = PMU_HEATHROW_BASED;
 328         else if (device_is_compatible(vias->parent, "Keylargo")
 329                  || device_is_compatible(vias->parent, "K2-Keylargo")) {
 330                 struct device_node *gpiop;
 331                 u64 gaddr = OF_BAD_ADDR;
 332
 333                 pmu_kind = PMU_KEYLARGO_BASED;
 334                 pmu_has_adb = (find_type_devices("adb") != NULL);
 335                 pmu_intr_mask = PMU_INT_PCEJECT |
 336                                 PMU_INT_SNDBRT |
 337                                 PMU_INT_ADB |
 338                                 PMU_INT_TICK |
 339                                 PMU_INT_ENVIRONMENT;
 340
 341                 gpiop = of_find_node_by_name(NULL, "gpio");
 342                 if (gpiop) {
 343                         reg = (u32 *)get_property(gpiop, "reg", NULL);
 344                         if (reg)
 345                                 gaddr = of_translate_address(gpiop, reg);
 346                         if (gaddr != OF_BAD_ADDR)
 347                                 gpio_reg = ioremap(gaddr, 0x10);
 348                 }
 349                 if (gpio_reg == NULL)
 350                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 351         } else
 352                 pmu_kind = PMU_UNKNOWN;
 353
 354         via = ioremap(taddr, 0x2000);
 355         if (via == NULL) {
 356                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 357                 goto fail;
 358         }
 359
 360         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 361         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 362
 363         pmu_state = idle;
 364
 365         if (!init_pmu()) {
 366                 via = NULL;
 367                 return 0;
 368         }
 369
 370         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 371                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 372
 373         sys_ctrler = SYS_CTRLER_PMU;
 374
 375         return 1;
 376  fail:
 377         of_node_put(vias);
 378         vias = NULL;
 379         return 0;
 380 }
 381
 382 #ifdef CONFIG_ADB
 383 static int pmu_probe(void)
 384 {
 385         return vias == NULL? -ENODEV: 0;
 386 }
 387
 388 static int __init pmu_init(void)
 389 {
 390         if (vias == NULL)
 391                 return -ENODEV;
 392         return 0;
 393 }
 394 #endif /* CONFIG_ADB */
 395
 396 /*
 397  * We can't wait until pmu_init gets called, that happens too late.
 398  * It happens after IDE and SCSI initialization, which can take a few
 399  * seconds, and by that time the PMU could have given up on us and
 400  * turned us off.
 401  * Thus this is called with arch_initcall rather than device_initcall.
 402  */
 403 static int __init via_pmu_start(void)
 404 {
 405         if (vias == NULL)
 406                 return -ENODEV;
 407
 408         batt_req.complete = 1;
 409
 410 #ifndef CONFIG_PPC_MERGE
 411         if (pmu_kind == PMU_KEYLARGO_BASED)
 412                 openpic_set_irq_priority(vias->intrs[0].line,
 413                                          OPENPIC_PRIORITY_DEFAULT + 1);
 414 #endif
 415
 416         if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU",
 417                         (void *)0)) {
 418                 printk(KERN_ERR "VIA-PMU: can't get irq %d\n",
 419                        vias->intrs[0].line);
 420                 return -EAGAIN;
 421         }
 422
 423         if (pmu_kind == PMU_KEYLARGO_BASED) {
 424                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 425                 if (gpio_node == NULL)
 426                         gpio_node = of_find_node_by_name(NULL,
 427                                                          "pmu-interrupt");
 428                 if (gpio_node && gpio_node->n_intrs > 0)
 429                         gpio_irq = gpio_node->intrs[0].line;
 430
 431                 if (gpio_irq != -1) {
 432                         if (request_irq(gpio_irq, gpio1_interrupt, 0,
 433                                         "GPIO1 ADB", (void *)0))
 434                                 printk(KERN_ERR "pmu: can't get irq %d"
 435                                        " (GPIO1)\n", gpio_irq);
 436                         else
 437                                 gpio_irq_enabled = 1;
 438                 }
 439         }
 440
 441         /* Enable interrupts */
 442         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 443
 444         pmu_fully_inited = 1;
 445
 446         /* Make sure PMU settle down before continuing. This is _very_ important
 447          * since the IDE probe may shut interrupts down for quite a bit of time. If
 448          * a PMU communication is pending while this happens, the PMU may timeout
 449          * Not that on Core99 machines, the PMU keeps sending us environement
 450          * messages, we should find a way to either fix IDE or make it call
 451          * pmu_suspend() before masking interrupts. This can also happens while
 452          * scolling with some fbdevs.
 453          */
 454         do {
 455                 pmu_poll();
 456         } while (pmu_state != idle);
 457
 458         return 0;
 459 }
 460
 461 arch_initcall(via_pmu_start);
 462
 463 /*
 464  * This has to be done after pci_init, which is a subsys_initcall.
 465  */
 466 static int __init via_pmu_dev_init(void)
 467 {
 468         if (vias == NULL)
 469                 return -ENODEV;
 470
 471 #ifdef CONFIG_PMAC_BACKLIGHT
 472         /* Initialize backlight */
 473         pmu_backlight_init(vias);
 474 #endif
 475
 476 #ifdef CONFIG_PPC32
 477         if (machine_is_compatible("AAPL,3400/2400") ||
 478                 machine_is_compatible("AAPL,3500")) {
 479                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 480                         NULL, PMAC_MB_INFO_MODEL, 0);
 481                 pmu_battery_count = 1;
 482                 if (mb == PMAC_TYPE_COMET)
 483                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 484                 else
 485                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 486         } else if (machine_is_compatible("AAPL,PowerBook1998") ||
 487                 machine_is_compatible("PowerBook1,1")) {
 488                 pmu_battery_count = 2;
 489                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 490                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 491         } else {
 492                 struct device_node* prim = find_devices("power-mgt");
 493                 u32 *prim_info = NULL;
 494                 if (prim)
 495                         prim_info = (u32 *)get_property(prim, "prim-info", NULL);
 496                 if (prim_info) {
 497                         /* Other stuffs here yet unknown */
 498                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 499                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 500                         if (pmu_battery_count > 1)
 501                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 502                 }
 503         }
 504 #endif /* CONFIG_PPC32 */
 505
 506         /* Create /proc/pmu */
 507         proc_pmu_root = proc_mkdir("pmu", NULL);
 508         if (proc_pmu_root) {
 509                 long i;
 510
 511                 for (i=0; i<pmu_battery_count; i++) {
 512                         char title[16];
 513                         sprintf(title, "battery_%ld", i);
 514                         proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
 515                                                 proc_get_batt, (void *)i);
 516                 }
 517
 518                 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
 519                                         proc_get_info, NULL);
 520                 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
 521                                         proc_get_irqstats, NULL);
 522                 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
 523                 if (proc_pmu_options) {
 524                         proc_pmu_options->nlink = 1;
 525                         proc_pmu_options->read_proc = proc_read_options;
 526                         proc_pmu_options->write_proc = proc_write_options;
 527                 }
 528         }
 529         return 0;
 530 }
 531
 532 device_initcall(via_pmu_dev_init);
 533
 534 static int
 535 init_pmu(void)
 536 {
 537         int timeout;
 538         struct adb_request req;
 539
 540         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 541         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 542
 543         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 544         timeout =  100000;
 545         while (!req.complete) {
 546                 if (--timeout < 0) {
 547                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 548                         return 0;
 549                 }
 550                 udelay(10);
 551                 pmu_poll();
 552         }
 553
 554         /* ack all pending interrupts */
 555         timeout = 100000;
 556         interrupt_data[0][0] = 1;
 557         while (interrupt_data[0][0] || pmu_state != idle) {
 558                 if (--timeout < 0) {
 559                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 560                         return 0;
 561                 }
 562                 if (pmu_state == idle)
 563                         adb_int_pending = 1;
 564                 via_pmu_interrupt(0, NULL, NULL);
 565                 udelay(10);
 566         }
 567
 568         /* Tell PMU we are ready.  */
 569         if (pmu_kind == PMU_KEYLARGO_BASED) {
 570                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 571                 while (!req.complete)
 572                         pmu_poll();
 573         }
 574
 575         /* Read PMU version */
 576         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 577         pmu_wait_complete(&req);
 578         if (req.reply_len > 0)
 579                 pmu_version = req.reply[0];
 580
 581         /* Read server mode setting */
 582         if (pmu_kind == PMU_KEYLARGO_BASED) {
 583                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 584                             PMU_PWR_GET_POWERUP_EVENTS);
 585                 pmu_wait_complete(&req);
 586                 if (req.reply_len == 2) {
 587                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 588                                 option_server_mode = 1;
 589                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 590                                option_server_mode ? "enabled" : "disabled");
 591                 }
 592         }
 593         return 1;
 594 }
 595
 596 int
 597 pmu_get_model(void)
 598 {
 599         return pmu_kind;
 600 }
 601
 602 static void pmu_set_server_mode(int server_mode)
 603 {
 604         struct adb_request req;
 605
 606         if (pmu_kind != PMU_KEYLARGO_BASED)
 607                 return;
 608
 609         option_server_mode = server_mode;
 610         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 611         pmu_wait_complete(&req);
 612         if (req.reply_len < 2)
 613                 return;
 614         if (server_mode)
 615                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 616                             PMU_PWR_SET_POWERUP_EVENTS,
 617                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 618         else
 619                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 620                             PMU_PWR_CLR_POWERUP_EVENTS,
 621                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 622         pmu_wait_complete(&req);
 623 }
 624
 625 /* This new version of the code for 2400/3400/3500 powerbooks
 626  * is inspired from the implementation in gkrellm-pmu
 627  */
 628 static void
 629 done_battery_state_ohare(struct adb_request* req)
 630 {
 631         /* format:
 632          *  [0]    :  flags
 633          *    0x01 :  AC indicator
 634          *    0x02 :  charging
 635          *    0x04 :  battery exist
 636          *    0x08 :
 637          *    0x10 :
 638          *    0x20 :  full charged
 639          *    0x40 :  pcharge reset
 640          *    0x80 :  battery exist
 641          *
 642          *  [1][2] :  battery voltage
 643          *  [3]    :  CPU temperature
 644          *  [4]    :  battery temperature
 645          *  [5]    :  current
 646          *  [6][7] :  pcharge
 647          *              --tkoba
 648          */
 649         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 650         long pcharge, charge, vb, vmax, lmax;
 651         long vmax_charging, vmax_charged;
 652         long amperage, voltage, time, max;
 653         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 654                         NULL, PMAC_MB_INFO_MODEL, 0);
 655
 656         if (req->reply[0] & 0x01)
 657                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 658         else
 659                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 660
 661         if (mb == PMAC_TYPE_COMET) {
 662                 vmax_charged = 189;
 663                 vmax_charging = 213;
 664                 lmax = 6500;
 665         } else {
 666                 vmax_charged = 330;
 667                 vmax_charging = 330;
 668                 lmax = 6500;
 669         }
 670         vmax = vmax_charged;
 671
 672         /* If battery installed */
 673         if (req->reply[0] & 0x04) {
 674                 bat_flags |= PMU_BATT_PRESENT;
 675                 if (req->reply[0] & 0x02)
 676                         bat_flags |= PMU_BATT_CHARGING;
 677                 vb = (req->reply[1] << 8) | req->reply[2];
 678                 voltage = (vb * 265 + 72665) / 10;
 679                 amperage = req->reply[5];
 680                 if ((req->reply[0] & 0x01) == 0) {
 681                         if (amperage > 200)
 682                                 vb += ((amperage - 200) * 15)/100;
 683                 } else if (req->reply[0] & 0x02) {
 684                         vb = (vb * 97) / 100;
 685                         vmax = vmax_charging;
 686                 }
 687                 charge = (100 * vb) / vmax;
 688                 if (req->reply[0] & 0x40) {
 689                         pcharge = (req->reply[6] << 8) + req->reply[7];
 690                         if (pcharge > lmax)
 691                                 pcharge = lmax;
 692                         pcharge *= 100;
 693                         pcharge = 100 - pcharge / lmax;
 694                         if (pcharge < charge)
 695                                 charge = pcharge;
 696                 }
 697                 if (amperage > 0)
 698                         time = (charge * 16440) / amperage;
 699                 else
 700                         time = 0;
 701                 max = 100;
 702                 amperage = -amperage;
 703         } else
 704                 charge = max = amperage = voltage = time = 0;
 705
 706         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 707         pmu_batteries[pmu_cur_battery].charge = charge;
 708         pmu_batteries[pmu_cur_battery].max_charge = max;
 709         pmu_batteries[pmu_cur_battery].amperage = amperage;
 710         pmu_batteries[pmu_cur_battery].voltage = voltage;
 711         pmu_batteries[pmu_cur_battery].time_remaining = time;
 712
 713         clear_bit(0, &async_req_locks);
 714 }
 715
 716 static void
 717 done_battery_state_smart(struct adb_request* req)
 718 {
 719         /* format:
 720          *  [0] : format of this structure (known: 3,4,5)
 721          *  [1] : flags
 722          *
 723          *  format 3 & 4:
 724          *
 725          *  [2] : charge
 726          *  [3] : max charge
 727          *  [4] : current
 728          *  [5] : voltage
 729          *
 730          *  format 5:
 731          *
 732          *  [2][3] : charge
 733          *  [4][5] : max charge
 734          *  [6][7] : current
 735          *  [8][9] : voltage
 736          */
 737
 738         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 739         int amperage;
 740         unsigned int capa, max, voltage;
 741
 742         if (req->reply[1] & 0x01)
 743                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 744         else
 745                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 746
 747
 748         capa = max = amperage = voltage = 0;
 749
 750         if (req->reply[1] & 0x04) {
 751                 bat_flags |= PMU_BATT_PRESENT;
 752                 switch(req->reply[0]) {
 753                         case 3:
 754                         case 4: capa = req->reply[2];
 755                                 max = req->reply[3];
 756                                 amperage = *((signed char *)&req->reply[4]);
 757                                 voltage = req->reply[5];
 758                                 break;
 759                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 760                                 max = (req->reply[4] << 8) | req->reply[5];
 761                                 amperage = *((signed short *)&req->reply[6]);
 762                                 voltage = (req->reply[8] << 8) | req->reply[9];
 763                                 break;
 764                         default:
 765                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 766                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 767                                 break;
 768                 }
 769         }
 770
 771         if ((req->reply[1] & 0x01) && (amperage > 0))
 772                 bat_flags |= PMU_BATT_CHARGING;
 773
 774         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 775         pmu_batteries[pmu_cur_battery].charge = capa;
 776         pmu_batteries[pmu_cur_battery].max_charge = max;
 777         pmu_batteries[pmu_cur_battery].amperage = amperage;
 778         pmu_batteries[pmu_cur_battery].voltage = voltage;
 779         if (amperage) {
 780                 if ((req->reply[1] & 0x01) && (amperage > 0))
 781                         pmu_batteries[pmu_cur_battery].time_remaining
 782                                 = ((max-capa) * 3600) / amperage;
 783                 else
 784                         pmu_batteries[pmu_cur_battery].time_remaining
 785                                 = (capa * 3600) / (-amperage);
 786         } else
 787                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 788
 789         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 790
 791         clear_bit(0, &async_req_locks);
 792 }
 793
 794 static void
 795 query_battery_state(void)
 796 {
 797         if (test_and_set_bit(0, &async_req_locks))
 798                 return;
 799         if (pmu_kind == PMU_OHARE_BASED)
 800                 pmu_request(&batt_req, done_battery_state_ohare,
 801                         1, PMU_BATTERY_STATE);
 802         else
 803                 pmu_request(&batt_req, done_battery_state_smart,
 804                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 805 }
 806
 807 static int
 808 proc_get_info(char *page, char **start, off_t off,
 809                 int count, int *eof, void *data)
 810 {
 811         char* p = page;
 812
 813         p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 814         p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
 815         p += sprintf(p, "AC Power               : %d\n",
 816                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 817         p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);
 818
 819         return p - page;
 820 }
 821
 822 static int
 823 proc_get_irqstats(char *page, char **start, off_t off,
 824                   int count, int *eof, void *data)
 825 {
 826         int i;
 827         char* p = page;
 828         static const char *irq_names[] = {
 829                 "Total CB1 triggered events",
 830                 "Total GPIO1 triggered events",
 831                 "PC-Card eject button",
 832                 "Sound/Brightness button",
 833                 "ADB message",
 834                 "Battery state change",
 835                 "Environment interrupt",
 836                 "Tick timer",
 837                 "Ghost interrupt (zero len)",
 838                 "Empty interrupt (empty mask)",
 839                 "Max irqs in a row"
 840         };
 841
 842         for (i=0; i<11; i++) {
 843                 p += sprintf(p, " %2u: %10u (%s)\n",
 844                              i, pmu_irq_stats[i], irq_names[i]);
 845         }
 846         return p - page;
 847 }
 848
 849 static int
 850 proc_get_batt(char *page, char **start, off_t off,
 851                 int count, int *eof, void *data)
 852 {
 853         long batnum = (long)data;
 854         char *p = page;
 855
 856         p += sprintf(p, "\n");
 857         p += sprintf(p, "flags      : %08x\n",
 858                 pmu_batteries[batnum].flags);
 859         p += sprintf(p, "charge     : %d\n",
 860                 pmu_batteries[batnum].charge);
 861         p += sprintf(p, "max_charge : %d\n",
 862                 pmu_batteries[batnum].max_charge);
 863         p += sprintf(p, "current    : %d\n",
 864                 pmu_batteries[batnum].amperage);
 865         p += sprintf(p, "voltage    : %d\n",
 866                 pmu_batteries[batnum].voltage);
 867         p += sprintf(p, "time rem.  : %d\n",
 868                 pmu_batteries[batnum].time_remaining);
 869
 870         return p - page;
 871 }
 872
 873 static int
 874 proc_read_options(char *page, char **start, off_t off,
 875                         int count, int *eof, void *data)
 876 {
 877         char *p = page;
 878
 879 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 880         if (pmu_kind == PMU_KEYLARGO_BASED &&
 881             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 882                 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
 883 #endif
 884         if (pmu_kind == PMU_KEYLARGO_BASED)
 885                 p += sprintf(p, "server_mode=%d\n", option_server_mode);
 886
 887         return p - page;
 888 }
 889
 890 static int
 891 proc_write_options(struct file *file, const char __user *buffer,
 892                         unsigned long count, void *data)
 893 {
 894         char tmp[33];
 895         char *label, *val;
 896         unsigned long fcount = count;
 897
 898         if (!count)
 899                 return -EINVAL;
 900         if (count > 32)
 901                 count = 32;
 902         if (copy_from_user(tmp, buffer, count))
 903                 return -EFAULT;
 904         tmp[count] = 0;
 905
 906         label = tmp;
 907         while(*label == ' ')
 908                 label++;
 909         val = label;
 910         while(*val && (*val != '=')) {
 911                 if (*val == ' ')
 912                         *val = 0;
 913                 val++;
 914         }
 915         if ((*val) == 0)
 916                 return -EINVAL;
 917         *(val++) = 0;
 918         while(*val == ' ')
 919                 val++;
 920 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 921         if (pmu_kind == PMU_KEYLARGO_BASED &&
 922             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 923                 if (!strcmp(label, "lid_wakeup"))
 924                         option_lid_wakeup = ((*val) == '1');
 925 #endif
 926         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 927                 int new_value;
 928                 new_value = ((*val) == '1');
 929                 if (new_value != option_server_mode)
 930                         pmu_set_server_mode(new_value);
 931         }
 932         return fcount;
 933 }
 934
 935 #ifdef CONFIG_ADB
 936 /* Send an ADB command */
 937 static int
 938 pmu_send_request(struct adb_request *req, int sync)
 939 {
 940         int i, ret;
 941
 942         if ((vias == NULL) || (!pmu_fully_inited)) {
 943                 req->complete = 1;
 944                 return -ENXIO;
 945         }
 946
 947         ret = -EINVAL;
 948
 949         switch (req->data[0]) {
 950         case PMU_PACKET:
 951                 for (i = 0; i < req->nbytes - 1; ++i)
 952                         req->data[i] = req->data[i+1];
 953                 --req->nbytes;
 954                 if (pmu_data_len[req->data[0]][1] != 0) {
 955                         req->reply[0] = ADB_RET_OK;
 956                         req->reply_len = 1;
 957                 } else
 958                         req->reply_len = 0;
 959                 ret = pmu_queue_request(req);
 960                 break;
 961         case CUDA_PACKET:
 962                 switch (req->data[1]) {
 963                 case CUDA_GET_TIME:
 964                         if (req->nbytes != 2)
 965                                 break;
 966                         req->data[0] = PMU_READ_RTC;
 967                         req->nbytes = 1;
 968                         req->reply_len = 3;
 969                         req->reply[0] = CUDA_PACKET;
 970                         req->reply[1] = 0;
 971                         req->reply[2] = CUDA_GET_TIME;
 972                         ret = pmu_queue_request(req);
 973                         break;
 974                 case CUDA_SET_TIME:
 975                         if (req->nbytes != 6)
 976                                 break;
 977                         req->data[0] = PMU_SET_RTC;
 978                         req->nbytes = 5;
 979                         for (i = 1; i <= 4; ++i)
 980                                 req->data[i] = req->data[i+1];
 981                         req->reply_len = 3;
 982                         req->reply[0] = CUDA_PACKET;
 983                         req->reply[1] = 0;
 984                         req->reply[2] = CUDA_SET_TIME;
 985                         ret = pmu_queue_request(req);
 986                         break;
 987                 }
 988                 break;
 989         case ADB_PACKET:
 990                 if (!pmu_has_adb)
 991                         return -ENXIO;
 992                 for (i = req->nbytes - 1; i > 1; --i)
 993                         req->data[i+2] = req->data[i];
 994                 req->data[3] = req->nbytes - 2;
 995                 req->data[2] = pmu_adb_flags;
 996                 /*req->data[1] = req->data[1];*/
 997                 req->data[0] = PMU_ADB_CMD;
 998                 req->nbytes += 2;
 999                 req->reply_expected = 1;
1000                 req->reply_len = 0;
1001                 ret = pmu_queue_request(req);
1002                 break;
1003         }
1004         if (ret) {
1005                 req->complete = 1;
1006                 return ret;
1007         }
1008
1009         if (sync)
1010                 while (!req->complete)
1011                         pmu_poll();
1012
1013         return 0;
1014 }
1015
1016 /* Enable/disable autopolling */
1017 static int
1018 pmu_adb_autopoll(int devs)
1019 {
1020         struct adb_request req;
1021
1022         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1023                 return -ENXIO;
1024
1025         if (devs) {
1026                 adb_dev_map = devs;
1027                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1028                             adb_dev_map >> 8, adb_dev_map);
1029                 pmu_adb_flags = 2;
1030         } else {
1031                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1032                 pmu_adb_flags = 0;
1033         }
1034         while (!req.complete)
1035                 pmu_poll();
1036         return 0;
1037 }
1038
1039 /* Reset the ADB bus */
1040 static int
1041 pmu_adb_reset_bus(void)
1042 {
1043         struct adb_request req;
1044         int save_autopoll = adb_dev_map;
1045
1046         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1047                 return -ENXIO;
1048
1049         /* anyone got a better idea?? */
1050         pmu_adb_autopoll(0);
1051
1052         req.nbytes = 5;
1053         req.done = NULL;
1054         req.data[0] = PMU_ADB_CMD;
1055         req.data[1] = 0;
1056         req.data[2] = ADB_BUSRESET;
1057         req.data[3] = 0;
1058         req.data[4] = 0;
1059         req.reply_len = 0;
1060         req.reply_expected = 1;
1061         if (pmu_queue_request(&req) != 0) {
1062                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1063                 return -EIO;
1064         }
1065         pmu_wait_complete(&req);
1066
1067         if (save_autopoll != 0)
1068                 pmu_adb_autopoll(save_autopoll);
1069
1070         return 0;
1071 }
1072 #endif /* CONFIG_ADB */
1073
1074 /* Construct and send a pmu request */
1075 int
1076 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1077             int nbytes, ...)
1078 {
1079         va_list list;
1080         int i;
1081
1082         if (vias == NULL)
1083                 return -ENXIO;
1084
1085         if (nbytes < 0 || nbytes > 32) {
1086                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1087                 req->complete = 1;
1088                 return -EINVAL;
1089         }
1090         req->nbytes = nbytes;
1091         req->done = done;
1092         va_start(list, nbytes);
1093         for (i = 0; i < nbytes; ++i)
1094                 req->data[i] = va_arg(list, int);
1095         va_end(list);
1096         req->reply_len = 0;
1097         req->reply_expected = 0;
1098         return pmu_queue_request(req);
1099 }
1100
1101 int
1102 pmu_queue_request(struct adb_request *req)
1103 {
1104         unsigned long flags;
1105         int nsend;
1106
1107         if (via == NULL) {
1108                 req->complete = 1;
1109                 return -ENXIO;
1110         }
1111         if (req->nbytes <= 0) {
1112                 req->complete = 1;
1113                 return 0;
1114         }
1115         nsend = pmu_data_len[req->data[0]][0];
1116         if (nsend >= 0 && req->nbytes != nsend + 1) {
1117                 req->complete = 1;
1118                 return -EINVAL;
1119         }
1120
1121         req->next = NULL;
1122         req->sent = 0;
1123         req->complete = 0;
1124
1125         spin_lock_irqsave(&pmu_lock, flags);
1126         if (current_req != 0) {
1127                 last_req->next = req;
1128                 last_req = req;
1129         } else {
1130                 current_req = req;
1131                 last_req = req;
1132                 if (pmu_state == idle)
1133                         pmu_start();
1134         }
1135         spin_unlock_irqrestore(&pmu_lock, flags);
1136
1137         return 0;
1138 }
1139
1140 static inline void
1141 wait_for_ack(void)
1142 {
1143         /* Sightly increased the delay, I had one occurrence of the message
1144          * reported
1145          */
1146         int timeout = 4000;
1147         while ((in_8(&via[B]) & TACK) == 0) {
1148                 if (--timeout < 0) {
1149                         printk(KERN_ERR "PMU not responding (!ack)\n");
1150                         return;
1151                 }
1152                 udelay(10);
1153         }
1154 }
1155
1156 /* New PMU seems to be very sensitive to those timings, so we make sure
1157  * PCI is flushed immediately */
1158 static inline void
1159 send_byte(int x)
1160 {
1161         volatile unsigned char __iomem *v = via;
1162
1163         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1164         out_8(&v[SR], x);
1165         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1166         (void)in_8(&v[B]);
1167 }
1168
1169 static inline void
1170 recv_byte(void)
1171 {
1172         volatile unsigned char __iomem *v = via;
1173
1174         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1175         in_8(&v[SR]);           /* resets SR */
1176         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1177         (void)in_8(&v[B]);
1178 }
1179
1180 static inline void
1181 pmu_done(struct adb_request *req)
1182 {
1183         void (*done)(struct adb_request *) = req->done;
1184         mb();
1185         req->complete = 1;
1186         /* Here, we assume that if the request has a done member, the
1187          * struct request will survive to setting req->complete to 1
1188          */
1189         if (done)
1190                 (*done)(req);
1191 }
1192
1193 static void
1194 pmu_start(void)
1195 {
1196         struct adb_request *req;
1197
1198         /* assert pmu_state == idle */
1199         /* get the packet to send */
1200         req = current_req;
1201         if (req == 0 || pmu_state != idle
1202             || (/*req->reply_expected && */req_awaiting_reply))
1203                 return;
1204
1205         pmu_state = sending;
1206         data_index = 1;
1207         data_len = pmu_data_len[req->data[0]][0];
1208
1209         /* Sounds safer to make sure ACK is high before writing. This helped
1210          * kill a problem with ADB and some iBooks
1211          */
1212         wait_for_ack();
1213         /* set the shift register to shift out and send a byte */
1214         send_byte(req->data[0]);
1215 }
1216
1217 void
1218 pmu_poll(void)
1219 {
1220         if (!via)
1221                 return;
1222         if (disable_poll)
1223                 return;
1224         via_pmu_interrupt(0, NULL, NULL);
1225 }
1226
1227 void
1228 pmu_poll_adb(void)
1229 {
1230         if (!via)
1231                 return;
1232         if (disable_poll)
1233                 return;
1234         /* Kicks ADB read when PMU is suspended */
1235         adb_int_pending = 1;
1236         do {
1237                 via_pmu_interrupt(0, NULL, NULL);
1238         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1239                 || req_awaiting_reply));
1240 }
1241
1242 void
1243 pmu_wait_complete(struct adb_request *req)
1244 {
1245         if (!via)
1246                 return;
1247         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1248                 via_pmu_interrupt(0, NULL, NULL);
1249 }
1250
1251 /* This function loops until the PMU is idle and prevents it from
1252  * anwsering to ADB interrupts. pmu_request can still be called.
1253  * This is done to avoid spurrious shutdowns when we know we'll have
1254  * interrupts switched off for a long time
1255  */
1256 void
1257 pmu_suspend(void)
1258 {
1259         unsigned long flags;
1260 #ifdef SUSPEND_USES_PMU
1261         struct adb_request *req;
1262 #endif
1263         if (!via)
1264                 return;
1265
1266         spin_lock_irqsave(&pmu_lock, flags);
1267         pmu_suspended++;
1268         if (pmu_suspended > 1) {
1269                 spin_unlock_irqrestore(&pmu_lock, flags);
1270                 return;
1271         }
1272
1273         do {
1274                 spin_unlock_irqrestore(&pmu_lock, flags);
1275                 if (req_awaiting_reply)
1276                         adb_int_pending = 1;
1277                 via_pmu_interrupt(0, NULL, NULL);
1278                 spin_lock_irqsave(&pmu_lock, flags);
1279                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1280 #ifdef SUSPEND_USES_PMU
1281                         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1282                         spin_unlock_irqrestore(&pmu_lock, flags);
1283                         while(!req.complete)
1284                                 pmu_poll();
1285 #else /* SUSPEND_USES_PMU */
1286                         if (gpio_irq >= 0)
1287                                 disable_irq_nosync(gpio_irq);
1288                         out_8(&via[IER], CB1_INT | IER_CLR);
1289                         spin_unlock_irqrestore(&pmu_lock, flags);
1290 #endif /* SUSPEND_USES_PMU */
1291                         break;
1292                 }
1293         } while (1);
1294 }
1295
1296 void
1297 pmu_resume(void)
1298 {
1299         unsigned long flags;
1300
1301         if (!via || (pmu_suspended < 1))
1302                 return;
1303
1304         spin_lock_irqsave(&pmu_lock, flags);
1305         pmu_suspended--;
1306         if (pmu_suspended > 0) {
1307                 spin_unlock_irqrestore(&pmu_lock, flags);
1308                 return;
1309         }
1310         adb_int_pending = 1;
1311 #ifdef SUSPEND_USES_PMU
1312         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1313         spin_unlock_irqrestore(&pmu_lock, flags);
1314         while(!req.complete)
1315                 pmu_poll();
1316 #else /* SUSPEND_USES_PMU */
1317         if (gpio_irq >= 0)
1318                 enable_irq(gpio_irq);
1319         out_8(&via[IER], CB1_INT | IER_SET);
1320         spin_unlock_irqrestore(&pmu_lock, flags);
1321         pmu_poll();
1322 #endif /* SUSPEND_USES_PMU */
1323 }
1324
1325 /* Interrupt data could be the result data from an ADB cmd */
1326 static void
1327 pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs)
1328 {
1329         unsigned char ints, pirq;
1330         int i = 0;
1331
1332         asleep = 0;
1333         if (drop_interrupts || len < 1) {
1334                 adb_int_pending = 0;
1335                 pmu_irq_stats[8]++;
1336                 return;
1337         }
1338
1339         /* Get PMU interrupt mask */
1340         ints = data[0];
1341
1342         /* Record zero interrupts for stats */
1343         if (ints == 0)
1344                 pmu_irq_stats[9]++;
1345
1346         /* Hack to deal with ADB autopoll flag */
1347         if (ints & PMU_INT_ADB)
1348                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1349
1350 next:
1351
1352         if (ints == 0) {
1353                 if (i > pmu_irq_stats[10])
1354                         pmu_irq_stats[10] = i;
1355                 return;
1356         }
1357
1358         for (pirq = 0; pirq < 8; pirq++)
1359                 if (ints & (1 << pirq))
1360                         break;
1361         pmu_irq_stats[pirq]++;
1362         i++;
1363         ints &= ~(1 << pirq);
1364
1365         /* Note: for some reason, we get an interrupt with len=1,
1366          * data[0]==0 after each normal ADB interrupt, at least
1367          * on the Pismo. Still investigating...  --BenH
1368          */
1369         if ((1 << pirq) & PMU_INT_ADB) {
1370                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1371                         struct adb_request *req = req_awaiting_reply;
1372                         if (req == 0) {
1373                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1374                                 return;
1375                         }
1376                         req_awaiting_reply = NULL;
1377                         if (len <= 2)
1378                                 req->reply_len = 0;
1379                         else {
1380                                 memcpy(req->reply, data + 1, len - 1);
1381                                 req->reply_len = len - 1;
1382                         }
1383                         pmu_done(req);
1384                 } else {
1385                         if (len == 4 && data[1] == 0x2c) {
1386                                 extern int xmon_wants_key, xmon_adb_keycode;
1387                                 if (xmon_wants_key) {
1388                                         xmon_adb_keycode = data[2];
1389                                         return;
1390                                 }
1391                         }
1392 #ifdef CONFIG_ADB
1393                         /*
1394                          * XXX On the [23]400 the PMU gives us an up
1395                          * event for keycodes 0x74 or 0x75 when the PC
1396                          * card eject buttons are released, so we
1397                          * ignore those events.
1398                          */
1399                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1400                               && data[1] == 0x2c && data[3] == 0xff
1401                               && (data[2] & ~1) == 0xf4))
1402                                 adb_input(data+1, len-1, regs, 1);
1403 #endif /* CONFIG_ADB */
1404                 }
1405         }
1406         /* Sound/brightness button pressed */
1407         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1408 #ifdef CONFIG_PMAC_BACKLIGHT
1409                 if (len == 3)
1410 #ifdef CONFIG_INPUT_ADBHID
1411                         if (!disable_kernel_backlight)
1412 #endif /* CONFIG_INPUT_ADBHID */
1413                                 pmac_backlight_set_legacy_brightness(data[1] >> 4);
1414 #endif /* CONFIG_PMAC_BACKLIGHT */
1415         }
1416         /* Tick interrupt */
1417         else if ((1 << pirq) & PMU_INT_TICK) {
1418                 /* Environement or tick interrupt, query batteries */
1419                 if (pmu_battery_count) {
1420                         if ((--query_batt_timer) == 0) {
1421                                 query_battery_state();
1422                                 query_batt_timer = BATTERY_POLLING_COUNT;
1423                         }
1424                 }
1425         }
1426         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1427                 if (pmu_battery_count)
1428                         query_battery_state();
1429                 pmu_pass_intr(data, len);
1430         } else {
1431                pmu_pass_intr(data, len);
1432         }
1433         goto next;
1434 }
1435
1436 static struct adb_request*
1437 pmu_sr_intr(struct pt_regs *regs)
1438 {
1439         struct adb_request *req;
1440         int bite = 0;
1441
1442         if (via[B] & TREQ) {
1443                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1444                 out_8(&via[IFR], SR_INT);
1445                 return NULL;
1446         }
1447         /* The ack may not yet be low when we get the interrupt */
1448         while ((in_8(&via[B]) & TACK) != 0)
1449                         ;
1450
1451         /* if reading grab the byte, and reset the interrupt */
1452         if (pmu_state == reading || pmu_state == reading_intr)
1453                 bite = in_8(&via[SR]);
1454
1455         /* reset TREQ and wait for TACK to go high */
1456         out_8(&via[B], in_8(&via[B]) | TREQ);
1457         wait_for_ack();
1458
1459         switch (pmu_state) {
1460         case sending:
1461                 req = current_req;
1462                 if (data_len < 0) {
1463                         data_len = req->nbytes - 1;
1464                         send_byte(data_len);
1465                         break;
1466                 }
1467                 if (data_index <= data_len) {
1468                         send_byte(req->data[data_index++]);
1469                         break;
1470                 }
1471                 req->sent = 1;
1472                 data_len = pmu_data_len[req->data[0]][1];
1473                 if (data_len == 0) {
1474                         pmu_state = idle;
1475                         current_req = req->next;
1476                         if (req->reply_expected)
1477                                 req_awaiting_reply = req;
1478                         else
1479                                 return req;
1480                 } else {
1481                         pmu_state = reading;
1482                         data_index = 0;
1483                         reply_ptr = req->reply + req->reply_len;
1484                         recv_byte();
1485                 }
1486                 break;
1487
1488         case intack:
1489                 data_index = 0;
1490                 data_len = -1;
1491                 pmu_state = reading_intr;
1492                 reply_ptr = interrupt_data[int_data_last];
1493                 recv_byte();
1494                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1495                         enable_irq(gpio_irq);
1496                         gpio_irq_enabled = 1;
1497                 }
1498                 break;
1499
1500         case reading:
1501         case reading_intr:
1502                 if (data_len == -1) {
1503                         data_len = bite;
1504                         if (bite > 32)
1505                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1506                 } else if (data_index < 32) {
1507                         reply_ptr[data_index++] = bite;
1508                 }
1509                 if (data_index < data_len) {
1510                         recv_byte();
1511                         break;
1512                 }
1513
1514                 if (pmu_state == reading_intr) {
1515                         pmu_state = idle;
1516                         int_data_state[int_data_last] = int_data_ready;
1517                         interrupt_data_len[int_data_last] = data_len;
1518                 } else {
1519                         req = current_req;
1520                         /*
1521                          * For PMU sleep and freq change requests, we lock the
1522                          * PMU until it's explicitely unlocked. This avoids any
1523                          * spurrious event polling getting in
1524                          */
1525                         current_req = req->next;
1526                         req->reply_len += data_index;
1527                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1528                                 pmu_state = locked;
1529                         else
1530                                 pmu_state = idle;
1531                         return req;
1532                 }
1533                 break;
1534
1535         default:
1536                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1537                        pmu_state);
1538         }
1539         return NULL;
1540 }
1541
1542 static irqreturn_t
1543 via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs)
1544 {
1545         unsigned long flags;
1546         int intr;
1547         int nloop = 0;
1548         int int_data = -1;
1549         struct adb_request *req = NULL;
1550         int handled = 0;
1551
1552         /* This is a bit brutal, we can probably do better */
1553         spin_lock_irqsave(&pmu_lock, flags);
1554         ++disable_poll;
1555
1556         for (;;) {
1557                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1558                 if (intr == 0)
1559                         break;
1560                 handled = 1;
1561                 if (++nloop > 1000) {
1562                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1563                                "intr=%x, ier=%x pmu_state=%d\n",
1564                                intr, in_8(&via[IER]), pmu_state);
1565                         break;
1566                 }
1567                 out_8(&via[IFR], intr);
1568                 if (intr & CB1_INT) {
1569                         adb_int_pending = 1;
1570                         pmu_irq_stats[0]++;
1571                 }
1572                 if (intr & SR_INT) {
1573                         req = pmu_sr_intr(regs);
1574                         if (req)
1575                                 break;
1576                 }
1577         }
1578
1579 recheck:
1580         if (pmu_state == idle) {
1581                 if (adb_int_pending) {
1582                         if (int_data_state[0] == int_data_empty)
1583                                 int_data_last = 0;
1584                         else if (int_data_state[1] == int_data_empty)
1585                                 int_data_last = 1;
1586                         else
1587                                 goto no_free_slot;
1588                         pmu_state = intack;
1589                         int_data_state[int_data_last] = int_data_fill;
1590                         /* Sounds safer to make sure ACK is high before writing.
1591                          * This helped kill a problem with ADB and some iBooks
1592                          */
1593                         wait_for_ack();
1594                         send_byte(PMU_INT_ACK);
1595                         adb_int_pending = 0;
1596                 } else if (current_req)
1597                         pmu_start();
1598         }
1599 no_free_slot:
1600         /* Mark the oldest buffer for flushing */
1601         if (int_data_state[!int_data_last] == int_data_ready) {
1602                 int_data_state[!int_data_last] = int_data_flush;
1603                 int_data = !int_data_last;
1604         } else if (int_data_state[int_data_last] == int_data_ready) {
1605                 int_data_state[int_data_last] = int_data_flush;
1606                 int_data = int_data_last;
1607         }
1608         --disable_poll;
1609         spin_unlock_irqrestore(&pmu_lock, flags);
1610
1611         /* Deal with completed PMU requests outside of the lock */
1612         if (req) {
1613                 pmu_done(req);
1614                 req = NULL;
1615         }
1616
1617         /* Deal with interrupt datas outside of the lock */
1618         if (int_data >= 0) {
1619                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs);
1620                 spin_lock_irqsave(&pmu_lock, flags);
1621                 ++disable_poll;
1622                 int_data_state[int_data] = int_data_empty;
1623                 int_data = -1;
1624                 goto recheck;
1625         }
1626
1627         return IRQ_RETVAL(handled);
1628 }
1629
1630 void
1631 pmu_unlock(void)
1632 {
1633         unsigned long flags;
1634
1635         spin_lock_irqsave(&pmu_lock, flags);
1636         if (pmu_state == locked)
1637                 pmu_state = idle;
1638         adb_int_pending = 1;
1639         spin_unlock_irqrestore(&pmu_lock, flags);
1640 }
1641
1642
1643 static irqreturn_t
1644 gpio1_interrupt(int irq, void *arg, struct pt_regs *regs)
1645 {
1646         unsigned long flags;
1647
1648         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1649                 spin_lock_irqsave(&pmu_lock, flags);
1650                 if (gpio_irq_enabled > 0) {
1651                         disable_irq_nosync(gpio_irq);
1652                         gpio_irq_enabled = 0;
1653                 }
1654                 pmu_irq_stats[1]++;
1655                 adb_int_pending = 1;
1656                 spin_unlock_irqrestore(&pmu_lock, flags);
1657                 via_pmu_interrupt(0, NULL, NULL);
1658                 return IRQ_HANDLED;
1659         }
1660         return IRQ_NONE;
1661 }
1662
1663 void
1664 pmu_enable_irled(int on)
1665 {
1666         struct adb_request req;
1667
1668         if (vias == NULL)
1669                 return ;
1670         if (pmu_kind == PMU_KEYLARGO_BASED)
1671                 return ;
1672
1673         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1674             (on ? PMU_POW_ON : PMU_POW_OFF));
1675         pmu_wait_complete(&req);
1676 }
1677
1678 void
1679 pmu_restart(void)
1680 {
1681         struct adb_request req;
1682
1683         if (via == NULL)
1684                 return;
1685
1686         local_irq_disable();
1687
1688         drop_interrupts = 1;
1689
1690         if (pmu_kind != PMU_KEYLARGO_BASED) {
1691                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1692                                                 PMU_INT_TICK );
1693                 while(!req.complete)
1694                         pmu_poll();
1695         }
1696
1697         pmu_request(&req, NULL, 1, PMU_RESET);
1698         pmu_wait_complete(&req);
1699         for (;;)
1700                 ;
1701 }
1702
1703 void
1704 pmu_shutdown(void)
1705 {
1706         struct adb_request req;
1707
1708         if (via == NULL)
1709                 return;
1710
1711         local_irq_disable();
1712
1713         drop_interrupts = 1;
1714
1715         if (pmu_kind != PMU_KEYLARGO_BASED) {
1716                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1717                                                 PMU_INT_TICK );
1718                 pmu_wait_complete(&req);
1719         } else {
1720                 /* Disable server mode on shutdown or we'll just
1721                  * wake up again
1722                  */
1723                 pmu_set_server_mode(0);
1724         }
1725
1726         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1727                     'M', 'A', 'T', 'T');
1728         pmu_wait_complete(&req);
1729         for (;;)
1730                 ;
1731 }
1732
1733 int
1734 pmu_present(void)
1735 {
1736         return via != 0;
1737 }
1738
1739 #ifdef CONFIG_PM
1740
1741 static LIST_HEAD(sleep_notifiers);
1742
1743 int
1744 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
1745 {
1746         struct list_head *list;
1747         struct pmu_sleep_notifier *notifier;
1748
1749         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1750              list = list->next) {
1751                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1752                 if (n->priority > notifier->priority)
1753                         break;
1754         }
1755         __list_add(&n->list, list->prev, list);
1756         return 0;
1757 }
1758 EXPORT_SYMBOL(pmu_register_sleep_notifier);
1759
1760 int
1761 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
1762 {
1763         if (n->list.next == 0)
1764                 return -ENOENT;
1765         list_del(&n->list);
1766         n->list.next = NULL;
1767         return 0;
1768 }
1769 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
1770 #endif /* CONFIG_PM */
1771
1772 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1773
1774 /* Sleep is broadcast last-to-first */
1775 static int
1776 broadcast_sleep(int when, int fallback)
1777 {
1778         int ret = PBOOK_SLEEP_OK;
1779         struct list_head *list;
1780         struct pmu_sleep_notifier *notifier;
1781
1782         for (list = sleep_notifiers.prev; list != &sleep_notifiers;
1783              list = list->prev) {
1784                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1785                 ret = notifier->notifier_call(notifier, when);
1786                 if (ret != PBOOK_SLEEP_OK) {
1787                         printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
1788                                when, notifier, notifier->notifier_call);
1789                         for (; list != &sleep_notifiers; list = list->next) {
1790                                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1791                                 notifier->notifier_call(notifier, fallback);
1792                         }
1793                         return ret;
1794                 }
1795         }
1796         return ret;
1797 }
1798
1799 /* Wake is broadcast first-to-last */
1800 static int
1801 broadcast_wake(void)
1802 {
1803         int ret = PBOOK_SLEEP_OK;
1804         struct list_head *list;
1805         struct pmu_sleep_notifier *notifier;
1806
1807         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1808              list = list->next) {
1809                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1810                 notifier->notifier_call(notifier, PBOOK_WAKE);
1811         }
1812         return ret;
1813 }
1814
1815 /*
1816  * This struct is used to store config register values for
1817  * PCI devices which may get powered off when we sleep.
1818  */
1819 static struct pci_save {
1820 #ifndef HACKED_PCI_SAVE
1821         u16     command;
1822         u16     cache_lat;
1823         u16     intr;
1824         u32     rom_address;
1825 #else
1826         u32     config[16];
1827 #endif
1828 } *pbook_pci_saves;
1829 static int pbook_npci_saves;
1830
1831 static void
1832 pbook_alloc_pci_save(void)
1833 {
1834         int npci;
1835         struct pci_dev *pd = NULL;
1836
1837         npci = 0;
1838         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1839                 ++npci;
1840         }
1841         if (npci == 0)
1842                 return;
1843         pbook_pci_saves = (struct pci_save *)
1844                 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
1845         pbook_npci_saves = npci;
1846 }
1847
1848 static void
1849 pbook_free_pci_save(void)
1850 {
1851         if (pbook_pci_saves == NULL)
1852                 return;
1853         kfree(pbook_pci_saves);
1854         pbook_pci_saves = NULL;
1855         pbook_npci_saves = 0;
1856 }
1857
1858 static void
1859 pbook_pci_save(void)
1860 {
1861         struct pci_save *ps = pbook_pci_saves;
1862         struct pci_dev *pd = NULL;
1863         int npci = pbook_npci_saves;
1864
1865         if (ps == NULL)
1866                 return;
1867
1868         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1869                 if (npci-- == 0)
1870                         return;
1871 #ifndef HACKED_PCI_SAVE
1872                 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
1873                 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
1874                 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
1875                 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
1876 #else
1877                 int i;
1878                 for (i=1;i<16;i++)
1879                         pci_read_config_dword(pd, i<<4, &ps->config[i]);
1880 #endif
1881                 ++ps;
1882         }
1883 }
1884
1885 /* For this to work, we must take care of a few things: If gmac was enabled
1886  * during boot, it will be in the pci dev list. If it's disabled at this point
1887  * (and it will probably be), then you can't access it's config space.
1888  */
1889 static void
1890 pbook_pci_restore(void)
1891 {
1892         u16 cmd;
1893         struct pci_save *ps = pbook_pci_saves - 1;
1894         struct pci_dev *pd = NULL;
1895         int npci = pbook_npci_saves;
1896         int j;
1897
1898         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1899 #ifdef HACKED_PCI_SAVE
1900                 int i;
1901                 if (npci-- == 0)
1902                         return;
1903                 ps++;
1904                 for (i=2;i<16;i++)
1905                         pci_write_config_dword(pd, i<<4, ps->config[i]);
1906                 pci_write_config_dword(pd, 4, ps->config[1]);
1907 #else
1908                 if (npci-- == 0)
1909                         return;
1910                 ps++;
1911                 if (ps->command == 0)
1912                         continue;
1913                 pci_read_config_word(pd, PCI_COMMAND, &cmd);
1914                 if ((ps->command & ~cmd) == 0)
1915                         continue;
1916                 switch (pd->hdr_type) {
1917                 case PCI_HEADER_TYPE_NORMAL:
1918                         for (j = 0; j < 6; ++j)
1919                                 pci_write_config_dword(pd,
1920                                         PCI_BASE_ADDRESS_0 + j*4,
1921                                         pd->resource[j].start);
1922                         pci_write_config_dword(pd, PCI_ROM_ADDRESS,
1923                                 ps->rom_address);
1924                         pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
1925                                 ps->cache_lat);
1926                         pci_write_config_word(pd, PCI_INTERRUPT_LINE,
1927                                 ps->intr);
1928                         pci_write_config_word(pd, PCI_COMMAND, ps->command);
1929                         break;
1930                 }
1931 #endif
1932         }
1933 }
1934
1935 #ifdef DEBUG_SLEEP
1936 /* N.B. This doesn't work on the 3400 */
1937 void
1938 pmu_blink(int n)
1939 {
1940         struct adb_request req;
1941
1942         memset(&req, 0, sizeof(req));
1943
1944         for (; n > 0; --n) {
1945                 req.nbytes = 4;
1946                 req.done = NULL;
1947                 req.data[0] = 0xee;
1948                 req.data[1] = 4;
1949                 req.data[2] = 0;
1950                 req.data[3] = 1;
1951                 req.reply[0] = ADB_RET_OK;
1952                 req.reply_len = 1;
1953                 req.reply_expected = 0;
1954                 pmu_polled_request(&req);
1955                 mdelay(50);
1956                 req.nbytes = 4;
1957                 req.done = NULL;
1958                 req.data[0] = 0xee;
1959                 req.data[1] = 4;
1960                 req.data[2] = 0;
1961                 req.data[3] = 0;
1962                 req.reply[0] = ADB_RET_OK;
1963                 req.reply_len = 1;
1964                 req.reply_expected = 0;
1965                 pmu_polled_request(&req);
1966                 mdelay(50);
1967         }
1968         mdelay(50);
1969 }
1970 #endif
1971
1972 /*
1973  * Put the powerbook to sleep.
1974  */
1975
1976 static u32 save_via[8];
1977
1978 static void
1979 save_via_state(void)
1980 {
1981         save_via[0] = in_8(&via[ANH]);
1982         save_via[1] = in_8(&via[DIRA]);
1983         save_via[2] = in_8(&via[B]);
1984         save_via[3] = in_8(&via[DIRB]);
1985         save_via[4] = in_8(&via[PCR]);
1986         save_via[5] = in_8(&via[ACR]);
1987         save_via[6] = in_8(&via[T1CL]);
1988         save_via[7] = in_8(&via[T1CH]);
1989 }
1990 static void
1991 restore_via_state(void)
1992 {
1993         out_8(&via[ANH], save_via[0]);
1994         out_8(&via[DIRA], save_via[1]);
1995         out_8(&via[B], save_via[2]);
1996         out_8(&via[DIRB], save_via[3]);
1997         out_8(&via[PCR], save_via[4]);
1998         out_8(&via[ACR], save_via[5]);
1999         out_8(&via[T1CL], save_via[6]);
2000         out_8(&via[T1CH], save_via[7]);
2001         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
2002         out_8(&via[IFR], 0x7f);                         /* clear IFR */
2003         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
2004 }
2005
2006 static int
2007 pmac_suspend_devices(void)
2008 {
2009         int ret;
2010
2011         pm_prepare_console();
2012
2013         /* Notify old-style device drivers & userland */
2014         ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
2015         if (ret != PBOOK_SLEEP_OK) {
2016                 printk(KERN_ERR "Sleep rejected by drivers\n");
2017                 return -EBUSY;
2018         }
2019
2020         /* Sync the disks. */
2021         /* XXX It would be nice to have some way to ensure that
2022          * nobody is dirtying any new buffers while we wait. That
2023          * could be achieved using the refrigerator for processes
2024          * that swsusp uses
2025          */
2026         sys_sync();
2027
2028         /* Sleep can fail now. May not be very robust but useful for debugging */
2029         ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
2030         if (ret != PBOOK_SLEEP_OK) {
2031                 printk(KERN_ERR "Driver sleep failed\n");
2032                 return -EBUSY;
2033         }
2034
2035         /* Send suspend call to devices, hold the device core's dpm_sem */
2036         ret = device_suspend(PMSG_SUSPEND);
2037         if (ret) {
2038                 broadcast_wake();
2039                 printk(KERN_ERR "Driver sleep failed\n");
2040                 return -EBUSY;
2041         }
2042
2043         /* Call platform functions marked "on sleep" */
2044         pmac_pfunc_i2c_suspend();
2045         pmac_pfunc_base_suspend();
2046
2047         /* Stop preemption */
2048         preempt_disable();
2049
2050         /* Make sure the decrementer won't interrupt us */
2051         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2052         /* Make sure any pending DEC interrupt occurring while we did
2053          * the above didn't re-enable the DEC */
2054         mb();
2055         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2056
2057         /* We can now disable MSR_EE. This code of course works properly only
2058          * on UP machines... For SMP, if we ever implement sleep, we'll have to
2059          * stop the "other" CPUs way before we do all that stuff.
2060          */
2061         local_irq_disable();
2062
2063         /* Broadcast power down irq
2064          * This isn't that useful in most cases (only directly wired devices can
2065          * use this but still... This will take care of sysdev's as well, so
2066          * we exit from here with local irqs disabled and PIC off.
2067          */
2068         ret = device_power_down(PMSG_SUSPEND);
2069         if (ret) {
2070                 wakeup_decrementer();
2071                 local_irq_enable();
2072                 preempt_enable();
2073                 device_resume();
2074                 broadcast_wake();
2075                 printk(KERN_ERR "Driver powerdown failed\n");
2076                 return -EBUSY;
2077         }
2078
2079         /* Wait for completion of async requests */
2080         while (!batt_req.complete)
2081                 pmu_poll();
2082
2083         /* Giveup the lazy FPU & vec so we don't have to back them
2084          * up from the low level code
2085          */
2086         enable_kernel_fp();
2087
2088 #ifdef CONFIG_ALTIVEC
2089         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2090                 enable_kernel_altivec();
2091 #endif /* CONFIG_ALTIVEC */
2092
2093         return 0;
2094 }
2095
2096 static int
2097 pmac_wakeup_devices(void)
2098 {
2099         mdelay(100);
2100
2101         /* Power back up system devices (including the PIC) */
2102         device_power_up();
2103
2104         /* Force a poll of ADB interrupts */
2105         adb_int_pending = 1;
2106         via_pmu_interrupt(0, NULL, NULL);
2107
2108         /* Restart jiffies & scheduling */
2109         wakeup_decrementer();
2110
2111         /* Re-enable local CPU interrupts */
2112         local_irq_enable();
2113         mdelay(10);
2114         preempt_enable();
2115
2116         /* Call platform functions marked "on wake" */
2117         pmac_pfunc_base_resume();
2118         pmac_pfunc_i2c_resume();
2119
2120         /* Resume devices */
2121         device_resume();
2122
2123         /* Notify old style drivers */
2124         broadcast_wake();
2125
2126         pm_restore_console();
2127
2128         return 0;
2129 }
2130
2131 #define GRACKLE_PM      (1<<7)
2132 #define GRACKLE_DOZE    (1<<5)
2133 #define GRACKLE_NAP     (1<<4)
2134 #define GRACKLE_SLEEP   (1<<3)
2135
2136 static int powerbook_sleep_grackle(void)
2137 {
2138         unsigned long save_l2cr;
2139         unsigned short pmcr1;
2140         struct adb_request req;
2141         int ret;
2142         struct pci_dev *grackle;
2143
2144         grackle = pci_find_slot(0, 0);
2145         if (!grackle)
2146                 return -ENODEV;
2147
2148         ret = pmac_suspend_devices();
2149         if (ret) {
2150                 printk(KERN_ERR "Sleep rejected by devices\n");
2151                 return ret;
2152         }
2153
2154         /* Turn off various things. Darwin does some retry tests here... */
2155         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2156         pmu_wait_complete(&req);
2157         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2158                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2159         pmu_wait_complete(&req);
2160
2161         /* For 750, save backside cache setting and disable it */
2162         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2163
2164         if (!__fake_sleep) {
2165                 /* Ask the PMU to put us to sleep */
2166                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2167                 pmu_wait_complete(&req);
2168         }
2169
2170         /* The VIA is supposed not to be restored correctly*/
2171         save_via_state();
2172         /* We shut down some HW */
2173         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2174
2175         pci_read_config_word(grackle, 0x70, &pmcr1);
2176         /* Apparently, MacOS uses NAP mode for Grackle ??? */
2177         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2178         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2179         pci_write_config_word(grackle, 0x70, pmcr1);
2180
2181         /* Call low-level ASM sleep handler */
2182         if (__fake_sleep)
2183                 mdelay(5000);
2184         else
2185                 low_sleep_handler();
2186
2187         /* We're awake again, stop grackle PM */
2188         pci_read_config_word(grackle, 0x70, &pmcr1);
2189         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2190         pci_write_config_word(grackle, 0x70, pmcr1);
2191
2192         /* Make sure the PMU is idle */
2193         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2194         restore_via_state();
2195
2196         /* Restore L2 cache */
2197         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2198                 _set_L2CR(save_l2cr);
2199
2200         /* Restore userland MMU context */
2201         set_context(current->active_mm->context.id, current->active_mm->pgd);
2202
2203         /* Power things up */
2204         pmu_unlock();
2205         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2206         pmu_wait_complete(&req);
2207         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2208                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2209         pmu_wait_complete(&req);
2210         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2211                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2212         pmu_wait_complete(&req);
2213
2214         pmac_wakeup_devices();
2215
2216         return 0;
2217 }
2218
2219 static int
2220 powerbook_sleep_Core99(void)
2221 {
2222         unsigned long save_l2cr;
2223         unsigned long save_l3cr;
2224         struct adb_request req;
2225         int ret;
2226
2227         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2228                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2229                 return -ENOSYS;
2230         }
2231
2232         if (num_online_cpus() > 1 || cpu_is_offline(0))
2233                 return -EAGAIN;
2234
2235         ret = pmac_suspend_devices();
2236         if (ret) {
2237                 printk(KERN_ERR "Sleep rejected by devices\n");
2238                 return ret;
2239         }
2240
2241         /* Stop environment and ADB interrupts */
2242         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2243         pmu_wait_complete(&req);
2244
2245         /* Tell PMU what events will wake us up */
2246         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2247                 0xff, 0xff);
2248         pmu_wait_complete(&req);
2249         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2250                 0, PMU_PWR_WAKEUP_KEY |
2251                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2252         pmu_wait_complete(&req);
2253
2254         /* Save the state of the L2 and L3 caches */
2255         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
2256         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2257
2258         if (!__fake_sleep) {
2259                 /* Ask the PMU to put us to sleep */
2260                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2261                 pmu_wait_complete(&req);
2262         }
2263
2264         /* The VIA is supposed not to be restored correctly*/
2265         save_via_state();
2266
2267         /* Shut down various ASICs. There's a chance that we can no longer
2268          * talk to the PMU after this, so I moved it to _after_ sending the
2269          * sleep command to it. Still need to be checked.
2270          */
2271         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2272
2273         /* Call low-level ASM sleep handler */
2274         if (__fake_sleep)
2275                 mdelay(5000);
2276         else
2277                 low_sleep_handler();
2278
2279         /* Restore Apple core ASICs state */
2280         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2281
2282         /* Restore VIA */
2283         restore_via_state();
2284
2285         /* tweak LPJ before cpufreq is there */
2286         loops_per_jiffy *= 2;
2287
2288         /* Restore video */
2289         pmac_call_early_video_resume();
2290
2291         /* Restore L2 cache */
2292         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2293                 _set_L2CR(save_l2cr);
2294         /* Restore L3 cache */
2295         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2296                 _set_L3CR(save_l3cr);
2297
2298         /* Restore userland MMU context */
2299         set_context(current->active_mm->context.id, current->active_mm->pgd);
2300
2301         /* Tell PMU we are ready */
2302         pmu_unlock();
2303         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2304         pmu_wait_complete(&req);
2305         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2306         pmu_wait_complete(&req);
2307
2308         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2309         loops_per_jiffy /= 2;
2310
2311         pmac_wakeup_devices();
2312
2313         return 0;
2314 }
2315
2316 #define PB3400_MEM_CTRL         0xf8000000
2317 #define PB3400_MEM_CTRL_SLEEP   0x70
2318
2319 static int
2320 powerbook_sleep_3400(void)
2321 {
2322         int ret, i, x;
2323         unsigned int hid0;
2324         unsigned long p;
2325         struct adb_request sleep_req;
2326         void __iomem *mem_ctrl;
2327         unsigned int __iomem *mem_ctrl_sleep;
2328
2329         /* first map in the memory controller registers */
2330         mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2331         if (mem_ctrl == NULL) {
2332                 printk("powerbook_sleep_3400: ioremap failed\n");
2333                 return -ENOMEM;
2334         }
2335         mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2336
2337         /* Allocate room for PCI save */
2338         pbook_alloc_pci_save();
2339
2340         ret = pmac_suspend_devices();
2341         if (ret) {
2342                 pbook_free_pci_save();
2343                 printk(KERN_ERR "Sleep rejected by devices\n");
2344                 return ret;
2345         }
2346
2347         /* Save the state of PCI config space for some slots */
2348         pbook_pci_save();
2349
2350         /* Set the memory controller to keep the memory refreshed
2351            while we're asleep */
2352         for (i = 0x403f; i >= 0x4000; --i) {
2353                 out_be32(mem_ctrl_sleep, i);
2354                 do {
2355                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2356                 } while (x == 0);
2357                 if (x >= 0x100)
2358                         break;
2359         }
2360
2361         /* Ask the PMU to put us to sleep */
2362         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2363         while (!sleep_req.complete)
2364                 mb();
2365
2366         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2367
2368         /* displacement-flush the L2 cache - necessary? */
2369         for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2370                 i = *(volatile int *)p;
2371         asleep = 1;
2372
2373         /* Put the CPU into sleep mode */
2374         hid0 = mfspr(SPRN_HID0);
2375         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2376         mtspr(SPRN_HID0, hid0);
2377         mtmsr(mfmsr() | MSR_POW | MSR_EE);
2378         udelay(10);
2379
2380         /* OK, we're awake again, start restoring things */
2381         out_be32(mem_ctrl_sleep, 0x3f);
2382         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2383         pbook_pci_restore();
2384         pmu_unlock();
2385
2386         /* wait for the PMU interrupt sequence to complete */
2387         while (asleep)
2388                 mb();
2389
2390         pmac_wakeup_devices();
2391         pbook_free_pci_save();
2392         iounmap(mem_ctrl);
2393
2394         return 0;
2395 }
2396
2397 #endif /* CONFIG_PM && CONFIG_PPC32 */
2398
2399 /*
2400  * Support for /dev/pmu device
2401  */
2402 #define RB_SIZE         0x10
2403 struct pmu_private {
2404         struct list_head list;
2405         int     rb_get;
2406         int     rb_put;
2407         struct rb_entry {
2408                 unsigned short len;
2409                 unsigned char data[16];
2410         }       rb_buf[RB_SIZE];
2411         wait_queue_head_t wait;
2412         spinlock_t lock;
2413 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2414         int     backlight_locker;
2415 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2416 };
2417
2418 static LIST_HEAD(all_pmu_pvt);
2419 static DEFINE_SPINLOCK(all_pvt_lock);
2420
2421 static void
2422 pmu_pass_intr(unsigned char *data, int len)
2423 {
2424         struct pmu_private *pp;
2425         struct list_head *list;
2426         int i;
2427         unsigned long flags;
2428
2429         if (len > sizeof(pp->rb_buf[0].data))
2430                 len = sizeof(pp->rb_buf[0].data);
2431         spin_lock_irqsave(&all_pvt_lock, flags);
2432         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2433                 pp = list_entry(list, struct pmu_private, list);
2434                 spin_lock(&pp->lock);
2435                 i = pp->rb_put + 1;
2436                 if (i >= RB_SIZE)
2437                         i = 0;
2438                 if (i != pp->rb_get) {
2439                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2440                         rp->len = len;
2441                         memcpy(rp->data, data, len);
2442                         pp->rb_put = i;
2443                         wake_up_interruptible(&pp->wait);
2444                 }
2445                 spin_unlock(&pp->lock);
2446         }
2447         spin_unlock_irqrestore(&all_pvt_lock, flags);
2448 }
2449
2450 static int
2451 pmu_open(struct inode *inode, struct file *file)
2452 {
2453         struct pmu_private *pp;
2454         unsigned long flags;
2455
2456         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2457         if (pp == 0)
2458                 return -ENOMEM;
2459         pp->rb_get = pp->rb_put = 0;
2460         spin_lock_init(&pp->lock);
2461         init_waitqueue_head(&pp->wait);
2462         spin_lock_irqsave(&all_pvt_lock, flags);
2463 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2464         pp->backlight_locker = 0;
2465 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2466         list_add(&pp->list, &all_pmu_pvt);
2467         spin_unlock_irqrestore(&all_pvt_lock, flags);
2468         file->private_data = pp;
2469         return 0;
2470 }
2471
2472 static ssize_t
2473 pmu_read(struct file *file, char __user *buf,
2474                         size_t count, loff_t *ppos)
2475 {
2476         struct pmu_private *pp = file->private_data;
2477         DECLARE_WAITQUEUE(wait, current);
2478         unsigned long flags;
2479         int ret = 0;
2480
2481         if (count < 1 || pp == 0)
2482                 return -EINVAL;
2483         if (!access_ok(VERIFY_WRITE, buf, count))
2484                 return -EFAULT;
2485
2486         spin_lock_irqsave(&pp->lock, flags);
2487         add_wait_queue(&pp->wait, &wait);
2488         current->state = TASK_INTERRUPTIBLE;
2489
2490         for (;;) {
2491                 ret = -EAGAIN;
2492                 if (pp->rb_get != pp->rb_put) {
2493                         int i = pp->rb_get;
2494                         struct rb_entry *rp = &pp->rb_buf[i];
2495                         ret = rp->len;
2496                         spin_unlock_irqrestore(&pp->lock, flags);
2497                         if (ret > count)
2498                                 ret = count;
2499                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2500                                 ret = -EFAULT;
2501                         if (++i >= RB_SIZE)
2502                                 i = 0;
2503                         spin_lock_irqsave(&pp->lock, flags);
2504                         pp->rb_get = i;
2505                 }
2506                 if (ret >= 0)
2507                         break;
2508                 if (file->f_flags & O_NONBLOCK)
2509                         break;
2510                 ret = -ERESTARTSYS;
2511                 if (signal_pending(current))
2512                         break;
2513                 spin_unlock_irqrestore(&pp->lock, flags);
2514                 schedule();
2515                 spin_lock_irqsave(&pp->lock, flags);
2516         }
2517         current->state = TASK_RUNNING;
2518         remove_wait_queue(&pp->wait, &wait);
2519         spin_unlock_irqrestore(&pp->lock, flags);
2520
2521         return ret;
2522 }
2523
2524 static ssize_t
2525 pmu_write(struct file *file, const char __user *buf,
2526                          size_t count, loff_t *ppos)
2527 {
2528         return 0;
2529 }
2530
2531 static unsigned int
2532 pmu_fpoll(struct file *filp, poll_table *wait)
2533 {
2534         struct pmu_private *pp = filp->private_data;
2535         unsigned int mask = 0;
2536         unsigned long flags;
2537
2538         if (pp == 0)
2539                 return 0;
2540         poll_wait(filp, &pp->wait, wait);
2541         spin_lock_irqsave(&pp->lock, flags);
2542         if (pp->rb_get != pp->rb_put)
2543                 mask |= POLLIN;
2544         spin_unlock_irqrestore(&pp->lock, flags);
2545         return mask;
2546 }
2547
2548 static int
2549 pmu_release(struct inode *inode, struct file *file)
2550 {
2551         struct pmu_private *pp = file->private_data;
2552         unsigned long flags;
2553
2554         lock_kernel();
2555         if (pp != 0) {
2556                 file->private_data = NULL;
2557                 spin_lock_irqsave(&all_pvt_lock, flags);
2558                 list_del(&pp->list);
2559                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2560 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2561                 if (pp->backlight_locker) {
2562                         spin_lock_irqsave(&pmu_lock, flags);
2563                         disable_kernel_backlight--;
2564                         spin_unlock_irqrestore(&pmu_lock, flags);
2565                 }
2566 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2567                 kfree(pp);
2568         }
2569         unlock_kernel();
2570         return 0;
2571 }
2572
2573 static int
2574 pmu_ioctl(struct inode * inode, struct file *filp,
2575                      u_int cmd, u_long arg)
2576 {
2577         __u32 __user *argp = (__u32 __user *)arg;
2578         int error = -EINVAL;
2579
2580         switch (cmd) {
2581 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2582         case PMU_IOC_SLEEP:
2583                 if (!capable(CAP_SYS_ADMIN))
2584                         return -EACCES;
2585                 if (sleep_in_progress)
2586                         return -EBUSY;
2587                 sleep_in_progress = 1;
2588                 switch (pmu_kind) {
2589                 case PMU_OHARE_BASED:
2590                         error = powerbook_sleep_3400();
2591                         break;
2592                 case PMU_HEATHROW_BASED:
2593                 case PMU_PADDINGTON_BASED:
2594                         error = powerbook_sleep_grackle();
2595                         break;
2596                 case PMU_KEYLARGO_BASED:
2597                         error = powerbook_sleep_Core99();
2598                         break;
2599                 default:
2600                         error = -ENOSYS;
2601                 }
2602                 sleep_in_progress = 0;
2603                 break;
2604         case PMU_IOC_CAN_SLEEP:
2605                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2606                         return put_user(0, argp);
2607                 else
2608                         return put_user(1, argp);
2609 #endif /* CONFIG_PM && CONFIG_PPC32 */
2610
2611 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2612         /* Compatibility ioctl's for backlight */
2613         case PMU_IOC_GET_BACKLIGHT:
2614         {
2615                 int brightness;
2616
2617                 if (sleep_in_progress)
2618                         return -EBUSY;
2619
2620                 brightness = pmac_backlight_get_legacy_brightness();
2621                 if (brightness < 0)
2622                         return brightness;
2623                 else
2624                         return put_user(brightness, argp);
2625
2626         }
2627         case PMU_IOC_SET_BACKLIGHT:
2628         {
2629                 int brightness;
2630
2631                 if (sleep_in_progress)
2632                         return -EBUSY;
2633
2634                 error = get_user(brightness, argp);
2635                 if (error)
2636                         return error;
2637
2638                 return pmac_backlight_set_legacy_brightness(brightness);
2639         }
2640 #ifdef CONFIG_INPUT_ADBHID
2641         case PMU_IOC_GRAB_BACKLIGHT: {
2642                 struct pmu_private *pp = filp->private_data;
2643                 unsigned long flags;
2644
2645                 if (pp->backlight_locker)
2646                         return 0;
2647                 pp->backlight_locker = 1;
2648                 spin_lock_irqsave(&pmu_lock, flags);
2649                 disable_kernel_backlight++;
2650                 spin_unlock_irqrestore(&pmu_lock, flags);
2651                 return 0;
2652         }
2653 #endif /* CONFIG_INPUT_ADBHID */
2654 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2655         case PMU_IOC_GET_MODEL:
2656                 return put_user(pmu_kind, argp);
2657         case PMU_IOC_HAS_ADB:
2658                 return put_user(pmu_has_adb, argp);
2659         }
2660         return error;
2661 }
2662
2663 static struct file_operations pmu_device_fops = {
2664         .read           = pmu_read,
2665         .write          = pmu_write,
2666         .poll           = pmu_fpoll,
2667         .ioctl          = pmu_ioctl,
2668         .open           = pmu_open,
2669         .release        = pmu_release,
2670 };
2671
2672 static struct miscdevice pmu_device = {
2673         PMU_MINOR, "pmu", &pmu_device_fops
2674 };
2675
2676 static int pmu_device_init(void)
2677 {
2678         if (!via)
2679                 return 0;
2680         if (misc_register(&pmu_device) < 0)
2681                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2682         return 0;
2683 }
2684 device_initcall(pmu_device_init);
2685
2686
2687 #ifdef DEBUG_SLEEP
2688 static inline void
2689 polled_handshake(volatile unsigned char __iomem *via)
2690 {
2691         via[B] &= ~TREQ; eieio();
2692         while ((via[B] & TACK) != 0)
2693                 ;
2694         via[B] |= TREQ; eieio();
2695         while ((via[B] & TACK) == 0)
2696                 ;
2697 }
2698
2699 static inline void
2700 polled_send_byte(volatile unsigned char __iomem *via, int x)
2701 {
2702         via[ACR] |= SR_OUT | SR_EXT; eieio();
2703         via[SR] = x; eieio();
2704         polled_handshake(via);
2705 }
2706
2707 static inline int
2708 polled_recv_byte(volatile unsigned char __iomem *via)
2709 {
2710         int x;
2711
2712         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2713         x = via[SR]; eieio();
2714         polled_handshake(via);
2715         x = via[SR]; eieio();
2716         return x;
2717 }
2718
2719 int
2720 pmu_polled_request(struct adb_request *req)
2721 {
2722         unsigned long flags;
2723         int i, l, c;
2724         volatile unsigned char __iomem *v = via;
2725
2726         req->complete = 1;
2727         c = req->data[0];
2728         l = pmu_data_len[c][0];
2729         if (l >= 0 && req->nbytes != l + 1)
2730                 return -EINVAL;
2731
2732         local_irq_save(flags);
2733         while (pmu_state != idle)
2734                 pmu_poll();
2735
2736         while ((via[B] & TACK) == 0)
2737                 ;
2738         polled_send_byte(v, c);
2739         if (l < 0) {
2740                 l = req->nbytes - 1;
2741                 polled_send_byte(v, l);
2742         }
2743         for (i = 1; i <= l; ++i)
2744                 polled_send_byte(v, req->data[i]);
2745
2746         l = pmu_data_len[c][1];
2747         if (l < 0)
2748                 l = polled_recv_byte(v);
2749         for (i = 0; i < l; ++i)
2750                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2751
2752         if (req->done)
2753                 (*req->done)(req);
2754
2755         local_irq_restore(flags);
2756         return 0;
2757 }
2758 #endif /* DEBUG_SLEEP */
2759
2760
2761 /* FIXME: This is a temporary set of callbacks to enable us
2762  * to do suspend-to-disk.
2763  */
2764
2765 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2766
2767 static int pmu_sys_suspended = 0;
2768
2769 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2770 {
2771         if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2772                 return 0;
2773
2774         /* Suspend PMU event interrupts */
2775         pmu_suspend();
2776
2777         pmu_sys_suspended = 1;
2778         return 0;
2779 }
2780
2781 static int pmu_sys_resume(struct sys_device *sysdev)
2782 {
2783         struct adb_request req;
2784
2785         if (!pmu_sys_suspended)
2786                 return 0;
2787
2788         /* Tell PMU we are ready */
2789         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2790         pmu_wait_complete(&req);
2791
2792         /* Resume PMU event interrupts */
2793         pmu_resume();
2794
2795         pmu_sys_suspended = 0;
2796
2797         return 0;
2798 }
2799
2800 #endif /* CONFIG_PM && CONFIG_PPC32 */
2801
2802 static struct sysdev_class pmu_sysclass = {
2803         set_kset_name("pmu"),
2804 };
2805
2806 static struct sys_device device_pmu = {
2807         .id             = 0,
2808         .cls            = &pmu_sysclass,
2809 };
2810
2811 static struct sysdev_driver driver_pmu = {
2812 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2813         .suspend        = &pmu_sys_suspend,
2814         .resume         = &pmu_sys_resume,
2815 #endif /* CONFIG_PM && CONFIG_PPC32 */
2816 };
2817
2818 static int __init init_pmu_sysfs(void)
2819 {
2820         int rc;
2821
2822         rc = sysdev_class_register(&pmu_sysclass);
2823         if (rc) {
2824                 printk(KERN_ERR "Failed registering PMU sys class\n");
2825                 return -ENODEV;
2826         }
2827         rc = sysdev_register(&device_pmu);
2828         if (rc) {
2829                 printk(KERN_ERR "Failed registering PMU sys device\n");
2830                 return -ENODEV;
2831         }
2832         rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2833         if (rc) {
2834                 printk(KERN_ERR "Failed registering PMU sys driver\n");
2835                 return -ENODEV;
2836         }
2837         return 0;
2838 }
2839
2840 subsys_initcall(init_pmu_sysfs);
2841
2842 EXPORT_SYMBOL(pmu_request);
2843 EXPORT_SYMBOL(pmu_queue_request);
2844 EXPORT_SYMBOL(pmu_poll);
2845 EXPORT_SYMBOL(pmu_poll_adb);
2846 EXPORT_SYMBOL(pmu_wait_complete);
2847 EXPORT_SYMBOL(pmu_suspend);
2848 EXPORT_SYMBOL(pmu_resume);
2849 EXPORT_SYMBOL(pmu_unlock);
2850 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2851 EXPORT_SYMBOL(pmu_enable_irled);
2852 EXPORT_SYMBOL(pmu_battery_count);
2853 EXPORT_SYMBOL(pmu_batteries);
2854 EXPORT_SYMBOL(pmu_power_flags);
2855 #endif /* CONFIG_PM && CONFIG_PPC32 */
2856