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 adb_request bright_req_1, bright_req_2;
 148 static struct device_node *vias;
 149 static int pmu_kind = PMU_UNKNOWN;
 150 static int pmu_fully_inited = 0;
 151 static int pmu_has_adb;
 152 static struct device_node *gpio_node;
 153 static unsigned char __iomem *gpio_reg = NULL;
 154 static int gpio_irq = -1;
 155 static int gpio_irq_enabled = -1;
 156 static volatile int pmu_suspended = 0;
 157 static spinlock_t pmu_lock;
 158 static u8 pmu_intr_mask;
 159 static int pmu_version;
 160 static int drop_interrupts;
 161 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 162 static int option_lid_wakeup = 1;
 163 #endif /* CONFIG_PM && CONFIG_PPC32 */
 164 static int sleep_in_progress;
 165 static unsigned long async_req_locks;
 166 static unsigned int pmu_irq_stats[11];
 167
 168 static struct proc_dir_entry *proc_pmu_root;
 169 static struct proc_dir_entry *proc_pmu_info;
 170 static struct proc_dir_entry *proc_pmu_irqstats;
 171 static struct proc_dir_entry *proc_pmu_options;
 172 static int option_server_mode;
 173
 174 int pmu_battery_count;
 175 int pmu_cur_battery;
 176 unsigned int pmu_power_flags;
 177 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 178 static int query_batt_timer = BATTERY_POLLING_COUNT;
 179 static struct adb_request batt_req;
 180 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 181
 182 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
 183 extern int disable_kernel_backlight;
 184 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
 185
 186 int __fake_sleep;
 187 int asleep;
 188 struct notifier_block *sleep_notifier_list;
 189
 190 #ifdef CONFIG_ADB
 191 static int adb_dev_map = 0;
 192 static int pmu_adb_flags;
 193
 194 static int pmu_probe(void);
 195 static int pmu_init(void);
 196 static int pmu_send_request(struct adb_request *req, int sync);
 197 static int pmu_adb_autopoll(int devs);
 198 static int pmu_adb_reset_bus(void);
 199 #endif /* CONFIG_ADB */
 200
 201 static int init_pmu(void);
 202 static void pmu_start(void);
 203 static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
 204 static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
 205 static int proc_get_info(char *page, char **start, off_t off,
 206                           int count, int *eof, void *data);
 207 static int proc_get_irqstats(char *page, char **start, off_t off,
 208                           int count, int *eof, void *data);
 209 #ifdef CONFIG_PMAC_BACKLIGHT
 210 static int pmu_set_backlight_level(int level, void* data);
 211 static int pmu_set_backlight_enable(int on, int level, void* data);
 212 #endif /* CONFIG_PMAC_BACKLIGHT */
 213 static void pmu_pass_intr(unsigned char *data, int len);
 214 static int proc_get_batt(char *page, char **start, off_t off,
 215                         int count, int *eof, void *data);
 216 static int proc_read_options(char *page, char **start, off_t off,
 217                         int count, int *eof, void *data);
 218 static int proc_write_options(struct file *file, const char __user *buffer,
 219                         unsigned long count, void *data);
 220
 221 #ifdef CONFIG_ADB
 222 struct adb_driver via_pmu_driver = {
 223         "PMU",
 224         pmu_probe,
 225         pmu_init,
 226         pmu_send_request,
 227         pmu_adb_autopoll,
 228         pmu_poll_adb,
 229         pmu_adb_reset_bus
 230 };
 231 #endif /* CONFIG_ADB */
 232
 233 extern void low_sleep_handler(void);
 234 extern void enable_kernel_altivec(void);
 235 extern void enable_kernel_fp(void);
 236
 237 #ifdef DEBUG_SLEEP
 238 int pmu_polled_request(struct adb_request *req);
 239 int pmu_wink(struct adb_request *req);
 240 #endif
 241
 242 /*
 243  * This table indicates for each PMU opcode:
 244  * - the number of data bytes to be sent with the command, or -1
 245  *   if a length byte should be sent,
 246  * - the number of response bytes which the PMU will return, or
 247  *   -1 if it will send a length byte.
 248  */
 249 static const s8 pmu_data_len[256][2] = {
 250 /*         0       1       2       3       4       5       6       7  */
 251 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 252 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 253 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 254 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 255 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 256 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 257 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 258 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 259 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 260 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 261 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 262 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 263 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 264 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 265 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 266 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 267 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 268 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 269 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 270 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 271 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 272 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 273 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 274 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 275 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 276 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 277 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 278 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 279 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 280 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 281 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 282 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 283 };
 284
 285 static char *pbook_type[] = {
 286         "Unknown PowerBook",
 287         "PowerBook 2400/3400/3500(G3)",
 288         "PowerBook G3 Series",
 289         "1999 PowerBook G3",
 290         "Core99"
 291 };
 292
 293 #ifdef CONFIG_PMAC_BACKLIGHT
 294 static struct backlight_controller pmu_backlight_controller = {
 295         pmu_set_backlight_enable,
 296         pmu_set_backlight_level
 297 };
 298 #endif /* CONFIG_PMAC_BACKLIGHT */
 299
 300 int __init find_via_pmu(void)
 301 {
 302         u64 taddr;
 303         u32 *reg;
 304
 305         if (via != 0)
 306                 return 1;
 307         vias = of_find_node_by_name(NULL, "via-pmu");
 308         if (vias == NULL)
 309                 return 0;
 310
 311         reg = (u32 *)get_property(vias, "reg", NULL);
 312         if (reg == NULL) {
 313                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 314                 goto fail;
 315         }
 316         taddr = of_translate_address(vias, reg);
 317         if (taddr == OF_BAD_ADDR) {
 318                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 319                 goto fail;
 320         }
 321
 322         spin_lock_init(&pmu_lock);
 323
 324         pmu_has_adb = 1;
 325
 326         pmu_intr_mask = PMU_INT_PCEJECT |
 327                         PMU_INT_SNDBRT |
 328                         PMU_INT_ADB |
 329                         PMU_INT_TICK;
 330
 331         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 332             || device_is_compatible(vias->parent, "ohare")))
 333                 pmu_kind = PMU_OHARE_BASED;
 334         else if (device_is_compatible(vias->parent, "paddington"))
 335                 pmu_kind = PMU_PADDINGTON_BASED;
 336         else if (device_is_compatible(vias->parent, "heathrow"))
 337                 pmu_kind = PMU_HEATHROW_BASED;
 338         else if (device_is_compatible(vias->parent, "Keylargo")
 339                  || device_is_compatible(vias->parent, "K2-Keylargo")) {
 340                 struct device_node *gpiop;
 341                 u64 gaddr = OF_BAD_ADDR;
 342
 343                 pmu_kind = PMU_KEYLARGO_BASED;
 344                 pmu_has_adb = (find_type_devices("adb") != NULL);
 345                 pmu_intr_mask = PMU_INT_PCEJECT |
 346                                 PMU_INT_SNDBRT |
 347                                 PMU_INT_ADB |
 348                                 PMU_INT_TICK |
 349                                 PMU_INT_ENVIRONMENT;
 350
 351                 gpiop = of_find_node_by_name(NULL, "gpio");
 352                 if (gpiop) {
 353                         reg = (u32 *)get_property(gpiop, "reg", NULL);
 354                         if (reg)
 355                                 gaddr = of_translate_address(gpiop, reg);
 356                         if (gaddr != OF_BAD_ADDR)
 357                                 gpio_reg = ioremap(gaddr, 0x10);
 358                 }
 359                 if (gpio_reg == NULL)
 360                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 361         } else
 362                 pmu_kind = PMU_UNKNOWN;
 363
 364         via = ioremap(taddr, 0x2000);
 365         if (via == NULL) {
 366                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 367                 goto fail;
 368         }
 369
 370         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 371         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 372
 373         pmu_state = idle;
 374
 375         if (!init_pmu()) {
 376                 via = NULL;
 377                 return 0;
 378         }
 379
 380         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 381                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 382
 383         sys_ctrler = SYS_CTRLER_PMU;
 384
 385         return 1;
 386  fail:
 387         of_node_put(vias);
 388         vias = NULL;
 389         return 0;
 390 }
 391
 392 #ifdef CONFIG_ADB
 393 static int pmu_probe(void)
 394 {
 395         return vias == NULL? -ENODEV: 0;
 396 }
 397
 398 static int __init pmu_init(void)
 399 {
 400         if (vias == NULL)
 401                 return -ENODEV;
 402         return 0;
 403 }
 404 #endif /* CONFIG_ADB */
 405
 406 /*
 407  * We can't wait until pmu_init gets called, that happens too late.
 408  * It happens after IDE and SCSI initialization, which can take a few
 409  * seconds, and by that time the PMU could have given up on us and
 410  * turned us off.
 411  * Thus this is called with arch_initcall rather than device_initcall.
 412  */
 413 static int __init via_pmu_start(void)
 414 {
 415         if (vias == NULL)
 416                 return -ENODEV;
 417
 418         bright_req_1.complete = 1;
 419         bright_req_2.complete = 1;
 420         batt_req.complete = 1;
 421
 422 #ifndef CONFIG_PPC_MERGE
 423         if (pmu_kind == PMU_KEYLARGO_BASED)
 424                 openpic_set_irq_priority(vias->intrs[0].line,
 425                                          OPENPIC_PRIORITY_DEFAULT + 1);
 426 #endif
 427
 428         if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU",
 429                         (void *)0)) {
 430                 printk(KERN_ERR "VIA-PMU: can't get irq %d\n",
 431                        vias->intrs[0].line);
 432                 return -EAGAIN;
 433         }
 434
 435         if (pmu_kind == PMU_KEYLARGO_BASED) {
 436                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 437                 if (gpio_node == NULL)
 438                         gpio_node = of_find_node_by_name(NULL,
 439                                                          "pmu-interrupt");
 440                 if (gpio_node && gpio_node->n_intrs > 0)
 441                         gpio_irq = gpio_node->intrs[0].line;
 442
 443                 if (gpio_irq != -1) {
 444                         if (request_irq(gpio_irq, gpio1_interrupt, 0,
 445                                         "GPIO1 ADB", (void *)0))
 446                                 printk(KERN_ERR "pmu: can't get irq %d"
 447                                        " (GPIO1)\n", gpio_irq);
 448                         else
 449                                 gpio_irq_enabled = 1;
 450                 }
 451         }
 452
 453         /* Enable interrupts */
 454         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 455
 456         pmu_fully_inited = 1;
 457
 458         /* Make sure PMU settle down before continuing. This is _very_ important
 459          * since the IDE probe may shut interrupts down for quite a bit of time. If
 460          * a PMU communication is pending while this happens, the PMU may timeout
 461          * Not that on Core99 machines, the PMU keeps sending us environement
 462          * messages, we should find a way to either fix IDE or make it call
 463          * pmu_suspend() before masking interrupts. This can also happens while
 464          * scolling with some fbdevs.
 465          */
 466         do {
 467                 pmu_poll();
 468         } while (pmu_state != idle);
 469
 470         return 0;
 471 }
 472
 473 arch_initcall(via_pmu_start);
 474
 475 /*
 476  * This has to be done after pci_init, which is a subsys_initcall.
 477  */
 478 static int __init via_pmu_dev_init(void)
 479 {
 480         if (vias == NULL)
 481                 return -ENODEV;
 482
 483 #ifdef CONFIG_PMAC_BACKLIGHT
 484         /* Enable backlight */
 485         register_backlight_controller(&pmu_backlight_controller, NULL, "pmu");
 486 #endif /* CONFIG_PMAC_BACKLIGHT */
 487
 488 #ifdef CONFIG_PPC32
 489         if (machine_is_compatible("AAPL,3400/2400") ||
 490                 machine_is_compatible("AAPL,3500")) {
 491                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 492                         NULL, PMAC_MB_INFO_MODEL, 0);
 493                 pmu_battery_count = 1;
 494                 if (mb == PMAC_TYPE_COMET)
 495                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 496                 else
 497                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 498         } else if (machine_is_compatible("AAPL,PowerBook1998") ||
 499                 machine_is_compatible("PowerBook1,1")) {
 500                 pmu_battery_count = 2;
 501                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 502                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 503         } else {
 504                 struct device_node* prim = find_devices("power-mgt");
 505                 u32 *prim_info = NULL;
 506                 if (prim)
 507                         prim_info = (u32 *)get_property(prim, "prim-info", NULL);
 508                 if (prim_info) {
 509                         /* Other stuffs here yet unknown */
 510                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 511                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 512                         if (pmu_battery_count > 1)
 513                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 514                 }
 515         }
 516 #endif /* CONFIG_PPC32 */
 517
 518         /* Create /proc/pmu */
 519         proc_pmu_root = proc_mkdir("pmu", NULL);
 520         if (proc_pmu_root) {
 521                 long i;
 522
 523                 for (i=0; i<pmu_battery_count; i++) {
 524                         char title[16];
 525                         sprintf(title, "battery_%ld", i);
 526                         proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
 527                                                 proc_get_batt, (void *)i);
 528                 }
 529
 530                 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
 531                                         proc_get_info, NULL);
 532                 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
 533                                         proc_get_irqstats, NULL);
 534                 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
 535                 if (proc_pmu_options) {
 536                         proc_pmu_options->nlink = 1;
 537                         proc_pmu_options->read_proc = proc_read_options;
 538                         proc_pmu_options->write_proc = proc_write_options;
 539                 }
 540         }
 541         return 0;
 542 }
 543
 544 device_initcall(via_pmu_dev_init);
 545
 546 static int
 547 init_pmu(void)
 548 {
 549         int timeout;
 550         struct adb_request req;
 551
 552         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 553         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 554
 555         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 556         timeout =  100000;
 557         while (!req.complete) {
 558                 if (--timeout < 0) {
 559                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 560                         return 0;
 561                 }
 562                 udelay(10);
 563                 pmu_poll();
 564         }
 565
 566         /* ack all pending interrupts */
 567         timeout = 100000;
 568         interrupt_data[0][0] = 1;
 569         while (interrupt_data[0][0] || pmu_state != idle) {
 570                 if (--timeout < 0) {
 571                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 572                         return 0;
 573                 }
 574                 if (pmu_state == idle)
 575                         adb_int_pending = 1;
 576                 via_pmu_interrupt(0, NULL, NULL);
 577                 udelay(10);
 578         }
 579
 580         /* Tell PMU we are ready.  */
 581         if (pmu_kind == PMU_KEYLARGO_BASED) {
 582                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 583                 while (!req.complete)
 584                         pmu_poll();
 585         }
 586
 587         /* Read PMU version */
 588         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 589         pmu_wait_complete(&req);
 590         if (req.reply_len > 0)
 591                 pmu_version = req.reply[0];
 592
 593         /* Read server mode setting */
 594         if (pmu_kind == PMU_KEYLARGO_BASED) {
 595                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 596                             PMU_PWR_GET_POWERUP_EVENTS);
 597                 pmu_wait_complete(&req);
 598                 if (req.reply_len == 2) {
 599                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 600                                 option_server_mode = 1;
 601                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 602                                option_server_mode ? "enabled" : "disabled");
 603                 }
 604         }
 605         return 1;
 606 }
 607
 608 int
 609 pmu_get_model(void)
 610 {
 611         return pmu_kind;
 612 }
 613
 614 static void pmu_set_server_mode(int server_mode)
 615 {
 616         struct adb_request req;
 617
 618         if (pmu_kind != PMU_KEYLARGO_BASED)
 619                 return;
 620
 621         option_server_mode = server_mode;
 622         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 623         pmu_wait_complete(&req);
 624         if (req.reply_len < 2)
 625                 return;
 626         if (server_mode)
 627                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 628                             PMU_PWR_SET_POWERUP_EVENTS,
 629                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 630         else
 631                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 632                             PMU_PWR_CLR_POWERUP_EVENTS,
 633                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 634         pmu_wait_complete(&req);
 635 }
 636
 637 /* This new version of the code for 2400/3400/3500 powerbooks
 638  * is inspired from the implementation in gkrellm-pmu
 639  */
 640 static void
 641 done_battery_state_ohare(struct adb_request* req)
 642 {
 643         /* format:
 644          *  [0]    :  flags
 645          *    0x01 :  AC indicator
 646          *    0x02 :  charging
 647          *    0x04 :  battery exist
 648          *    0x08 :
 649          *    0x10 :
 650          *    0x20 :  full charged
 651          *    0x40 :  pcharge reset
 652          *    0x80 :  battery exist
 653          *
 654          *  [1][2] :  battery voltage
 655          *  [3]    :  CPU temperature
 656          *  [4]    :  battery temperature
 657          *  [5]    :  current
 658          *  [6][7] :  pcharge
 659          *              --tkoba
 660          */
 661         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 662         long pcharge, charge, vb, vmax, lmax;
 663         long vmax_charging, vmax_charged;
 664         long amperage, voltage, time, max;
 665         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 666                         NULL, PMAC_MB_INFO_MODEL, 0);
 667
 668         if (req->reply[0] & 0x01)
 669                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 670         else
 671                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 672
 673         if (mb == PMAC_TYPE_COMET) {
 674                 vmax_charged = 189;
 675                 vmax_charging = 213;
 676                 lmax = 6500;
 677         } else {
 678                 vmax_charged = 330;
 679                 vmax_charging = 330;
 680                 lmax = 6500;
 681         }
 682         vmax = vmax_charged;
 683
 684         /* If battery installed */
 685         if (req->reply[0] & 0x04) {
 686                 bat_flags |= PMU_BATT_PRESENT;
 687                 if (req->reply[0] & 0x02)
 688                         bat_flags |= PMU_BATT_CHARGING;
 689                 vb = (req->reply[1] << 8) | req->reply[2];
 690                 voltage = (vb * 265 + 72665) / 10;
 691                 amperage = req->reply[5];
 692                 if ((req->reply[0] & 0x01) == 0) {
 693                         if (amperage > 200)
 694                                 vb += ((amperage - 200) * 15)/100;
 695                 } else if (req->reply[0] & 0x02) {
 696                         vb = (vb * 97) / 100;
 697                         vmax = vmax_charging;
 698                 }
 699                 charge = (100 * vb) / vmax;
 700                 if (req->reply[0] & 0x40) {
 701                         pcharge = (req->reply[6] << 8) + req->reply[7];
 702                         if (pcharge > lmax)
 703                                 pcharge = lmax;
 704                         pcharge *= 100;
 705                         pcharge = 100 - pcharge / lmax;
 706                         if (pcharge < charge)
 707                                 charge = pcharge;
 708                 }
 709                 if (amperage > 0)
 710                         time = (charge * 16440) / amperage;
 711                 else
 712                         time = 0;
 713                 max = 100;
 714                 amperage = -amperage;
 715         } else
 716                 charge = max = amperage = voltage = time = 0;
 717
 718         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 719         pmu_batteries[pmu_cur_battery].charge = charge;
 720         pmu_batteries[pmu_cur_battery].max_charge = max;
 721         pmu_batteries[pmu_cur_battery].amperage = amperage;
 722         pmu_batteries[pmu_cur_battery].voltage = voltage;
 723         pmu_batteries[pmu_cur_battery].time_remaining = time;
 724
 725         clear_bit(0, &async_req_locks);
 726 }
 727
 728 static void
 729 done_battery_state_smart(struct adb_request* req)
 730 {
 731         /* format:
 732          *  [0] : format of this structure (known: 3,4,5)
 733          *  [1] : flags
 734          *
 735          *  format 3 & 4:
 736          *
 737          *  [2] : charge
 738          *  [3] : max charge
 739          *  [4] : current
 740          *  [5] : voltage
 741          *
 742          *  format 5:
 743          *
 744          *  [2][3] : charge
 745          *  [4][5] : max charge
 746          *  [6][7] : current
 747          *  [8][9] : voltage
 748          */
 749
 750         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 751         int amperage;
 752         unsigned int capa, max, voltage;
 753
 754         if (req->reply[1] & 0x01)
 755                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 756         else
 757                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 758
 759
 760         capa = max = amperage = voltage = 0;
 761
 762         if (req->reply[1] & 0x04) {
 763                 bat_flags |= PMU_BATT_PRESENT;
 764                 switch(req->reply[0]) {
 765                         case 3:
 766                         case 4: capa = req->reply[2];
 767                                 max = req->reply[3];
 768                                 amperage = *((signed char *)&req->reply[4]);
 769                                 voltage = req->reply[5];
 770                                 break;
 771                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 772                                 max = (req->reply[4] << 8) | req->reply[5];
 773                                 amperage = *((signed short *)&req->reply[6]);
 774                                 voltage = (req->reply[8] << 8) | req->reply[9];
 775                                 break;
 776                         default:
 777                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 778                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 779                                 break;
 780                 }
 781         }
 782
 783         if ((req->reply[1] & 0x01) && (amperage > 0))
 784                 bat_flags |= PMU_BATT_CHARGING;
 785
 786         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 787         pmu_batteries[pmu_cur_battery].charge = capa;
 788         pmu_batteries[pmu_cur_battery].max_charge = max;
 789         pmu_batteries[pmu_cur_battery].amperage = amperage;
 790         pmu_batteries[pmu_cur_battery].voltage = voltage;
 791         if (amperage) {
 792                 if ((req->reply[1] & 0x01) && (amperage > 0))
 793                         pmu_batteries[pmu_cur_battery].time_remaining
 794                                 = ((max-capa) * 3600) / amperage;
 795                 else
 796                         pmu_batteries[pmu_cur_battery].time_remaining
 797                                 = (capa * 3600) / (-amperage);
 798         } else
 799                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 800
 801         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 802
 803         clear_bit(0, &async_req_locks);
 804 }
 805
 806 static void
 807 query_battery_state(void)
 808 {
 809         if (test_and_set_bit(0, &async_req_locks))
 810                 return;
 811         if (pmu_kind == PMU_OHARE_BASED)
 812                 pmu_request(&batt_req, done_battery_state_ohare,
 813                         1, PMU_BATTERY_STATE);
 814         else
 815                 pmu_request(&batt_req, done_battery_state_smart,
 816                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 817 }
 818
 819 static int
 820 proc_get_info(char *page, char **start, off_t off,
 821                 int count, int *eof, void *data)
 822 {
 823         char* p = page;
 824
 825         p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 826         p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
 827         p += sprintf(p, "AC Power               : %d\n",
 828                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 829         p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);
 830
 831         return p - page;
 832 }
 833
 834 static int
 835 proc_get_irqstats(char *page, char **start, off_t off,
 836                   int count, int *eof, void *data)
 837 {
 838         int i;
 839         char* p = page;
 840         static const char *irq_names[] = {
 841                 "Total CB1 triggered events",
 842                 "Total GPIO1 triggered events",
 843                 "PC-Card eject button",
 844                 "Sound/Brightness button",
 845                 "ADB message",
 846                 "Battery state change",
 847                 "Environment interrupt",
 848                 "Tick timer",
 849                 "Ghost interrupt (zero len)",
 850                 "Empty interrupt (empty mask)",
 851                 "Max irqs in a row"
 852         };
 853
 854         for (i=0; i<11; i++) {
 855                 p += sprintf(p, " %2u: %10u (%s)\n",
 856                              i, pmu_irq_stats[i], irq_names[i]);
 857         }
 858         return p - page;
 859 }
 860
 861 static int
 862 proc_get_batt(char *page, char **start, off_t off,
 863                 int count, int *eof, void *data)
 864 {
 865         long batnum = (long)data;
 866         char *p = page;
 867
 868         p += sprintf(p, "\n");
 869         p += sprintf(p, "flags      : %08x\n",
 870                 pmu_batteries[batnum].flags);
 871         p += sprintf(p, "charge     : %d\n",
 872                 pmu_batteries[batnum].charge);
 873         p += sprintf(p, "max_charge : %d\n",
 874                 pmu_batteries[batnum].max_charge);
 875         p += sprintf(p, "current    : %d\n",
 876                 pmu_batteries[batnum].amperage);
 877         p += sprintf(p, "voltage    : %d\n",
 878                 pmu_batteries[batnum].voltage);
 879         p += sprintf(p, "time rem.  : %d\n",
 880                 pmu_batteries[batnum].time_remaining);
 881
 882         return p - page;
 883 }
 884
 885 static int
 886 proc_read_options(char *page, char **start, off_t off,
 887                         int count, int *eof, void *data)
 888 {
 889         char *p = page;
 890
 891 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 892         if (pmu_kind == PMU_KEYLARGO_BASED &&
 893             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 894                 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
 895 #endif
 896         if (pmu_kind == PMU_KEYLARGO_BASED)
 897                 p += sprintf(p, "server_mode=%d\n", option_server_mode);
 898
 899         return p - page;
 900 }
 901
 902 static int
 903 proc_write_options(struct file *file, const char __user *buffer,
 904                         unsigned long count, void *data)
 905 {
 906         char tmp[33];
 907         char *label, *val;
 908         unsigned long fcount = count;
 909
 910         if (!count)
 911                 return -EINVAL;
 912         if (count > 32)
 913                 count = 32;
 914         if (copy_from_user(tmp, buffer, count))
 915                 return -EFAULT;
 916         tmp[count] = 0;
 917
 918         label = tmp;
 919         while(*label == ' ')
 920                 label++;
 921         val = label;
 922         while(*val && (*val != '=')) {
 923                 if (*val == ' ')
 924                         *val = 0;
 925                 val++;
 926         }
 927         if ((*val) == 0)
 928                 return -EINVAL;
 929         *(val++) = 0;
 930         while(*val == ' ')
 931                 val++;
 932 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 933         if (pmu_kind == PMU_KEYLARGO_BASED &&
 934             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 935                 if (!strcmp(label, "lid_wakeup"))
 936                         option_lid_wakeup = ((*val) == '1');
 937 #endif
 938         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 939                 int new_value;
 940                 new_value = ((*val) == '1');
 941                 if (new_value != option_server_mode)
 942                         pmu_set_server_mode(new_value);
 943         }
 944         return fcount;
 945 }
 946
 947 #ifdef CONFIG_ADB
 948 /* Send an ADB command */
 949 static int
 950 pmu_send_request(struct adb_request *req, int sync)
 951 {
 952         int i, ret;
 953
 954         if ((vias == NULL) || (!pmu_fully_inited)) {
 955                 req->complete = 1;
 956                 return -ENXIO;
 957         }
 958
 959         ret = -EINVAL;
 960
 961         switch (req->data[0]) {
 962         case PMU_PACKET:
 963                 for (i = 0; i < req->nbytes - 1; ++i)
 964                         req->data[i] = req->data[i+1];
 965                 --req->nbytes;
 966                 if (pmu_data_len[req->data[0]][1] != 0) {
 967                         req->reply[0] = ADB_RET_OK;
 968                         req->reply_len = 1;
 969                 } else
 970                         req->reply_len = 0;
 971                 ret = pmu_queue_request(req);
 972                 break;
 973         case CUDA_PACKET:
 974                 switch (req->data[1]) {
 975                 case CUDA_GET_TIME:
 976                         if (req->nbytes != 2)
 977                                 break;
 978                         req->data[0] = PMU_READ_RTC;
 979                         req->nbytes = 1;
 980                         req->reply_len = 3;
 981                         req->reply[0] = CUDA_PACKET;
 982                         req->reply[1] = 0;
 983                         req->reply[2] = CUDA_GET_TIME;
 984                         ret = pmu_queue_request(req);
 985                         break;
 986                 case CUDA_SET_TIME:
 987                         if (req->nbytes != 6)
 988                                 break;
 989                         req->data[0] = PMU_SET_RTC;
 990                         req->nbytes = 5;
 991                         for (i = 1; i <= 4; ++i)
 992                                 req->data[i] = req->data[i+1];
 993                         req->reply_len = 3;
 994                         req->reply[0] = CUDA_PACKET;
 995                         req->reply[1] = 0;
 996                         req->reply[2] = CUDA_SET_TIME;
 997                         ret = pmu_queue_request(req);
 998                         break;
 999                 }
1000                 break;
1001         case ADB_PACKET:
1002                 if (!pmu_has_adb)
1003                         return -ENXIO;
1004                 for (i = req->nbytes - 1; i > 1; --i)
1005                         req->data[i+2] = req->data[i];
1006                 req->data[3] = req->nbytes - 2;
1007                 req->data[2] = pmu_adb_flags;
1008                 /*req->data[1] = req->data[1];*/
1009                 req->data[0] = PMU_ADB_CMD;
1010                 req->nbytes += 2;
1011                 req->reply_expected = 1;
1012                 req->reply_len = 0;
1013                 ret = pmu_queue_request(req);
1014                 break;
1015         }
1016         if (ret) {
1017                 req->complete = 1;
1018                 return ret;
1019         }
1020
1021         if (sync)
1022                 while (!req->complete)
1023                         pmu_poll();
1024
1025         return 0;
1026 }
1027
1028 /* Enable/disable autopolling */
1029 static int
1030 pmu_adb_autopoll(int devs)
1031 {
1032         struct adb_request req;
1033
1034         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1035                 return -ENXIO;
1036
1037         if (devs) {
1038                 adb_dev_map = devs;
1039                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1040                             adb_dev_map >> 8, adb_dev_map);
1041                 pmu_adb_flags = 2;
1042         } else {
1043                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1044                 pmu_adb_flags = 0;
1045         }
1046         while (!req.complete)
1047                 pmu_poll();
1048         return 0;
1049 }
1050
1051 /* Reset the ADB bus */
1052 static int
1053 pmu_adb_reset_bus(void)
1054 {
1055         struct adb_request req;
1056         int save_autopoll = adb_dev_map;
1057
1058         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1059                 return -ENXIO;
1060
1061         /* anyone got a better idea?? */
1062         pmu_adb_autopoll(0);
1063
1064         req.nbytes = 5;
1065         req.done = NULL;
1066         req.data[0] = PMU_ADB_CMD;
1067         req.data[1] = 0;
1068         req.data[2] = ADB_BUSRESET;
1069         req.data[3] = 0;
1070         req.data[4] = 0;
1071         req.reply_len = 0;
1072         req.reply_expected = 1;
1073         if (pmu_queue_request(&req) != 0) {
1074                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1075                 return -EIO;
1076         }
1077         pmu_wait_complete(&req);
1078
1079         if (save_autopoll != 0)
1080                 pmu_adb_autopoll(save_autopoll);
1081
1082         return 0;
1083 }
1084 #endif /* CONFIG_ADB */
1085
1086 /* Construct and send a pmu request */
1087 int
1088 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1089             int nbytes, ...)
1090 {
1091         va_list list;
1092         int i;
1093
1094         if (vias == NULL)
1095                 return -ENXIO;
1096
1097         if (nbytes < 0 || nbytes > 32) {
1098                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1099                 req->complete = 1;
1100                 return -EINVAL;
1101         }
1102         req->nbytes = nbytes;
1103         req->done = done;
1104         va_start(list, nbytes);
1105         for (i = 0; i < nbytes; ++i)
1106                 req->data[i] = va_arg(list, int);
1107         va_end(list);
1108         req->reply_len = 0;
1109         req->reply_expected = 0;
1110         return pmu_queue_request(req);
1111 }
1112
1113 int
1114 pmu_queue_request(struct adb_request *req)
1115 {
1116         unsigned long flags;
1117         int nsend;
1118
1119         if (via == NULL) {
1120                 req->complete = 1;
1121                 return -ENXIO;
1122         }
1123         if (req->nbytes <= 0) {
1124                 req->complete = 1;
1125                 return 0;
1126         }
1127         nsend = pmu_data_len[req->data[0]][0];
1128         if (nsend >= 0 && req->nbytes != nsend + 1) {
1129                 req->complete = 1;
1130                 return -EINVAL;
1131         }
1132
1133         req->next = NULL;
1134         req->sent = 0;
1135         req->complete = 0;
1136
1137         spin_lock_irqsave(&pmu_lock, flags);
1138         if (current_req != 0) {
1139                 last_req->next = req;
1140                 last_req = req;
1141         } else {
1142                 current_req = req;
1143                 last_req = req;
1144                 if (pmu_state == idle)
1145                         pmu_start();
1146         }
1147         spin_unlock_irqrestore(&pmu_lock, flags);
1148
1149         return 0;
1150 }
1151
1152 static inline void
1153 wait_for_ack(void)
1154 {
1155         /* Sightly increased the delay, I had one occurrence of the message
1156          * reported
1157          */
1158         int timeout = 4000;
1159         while ((in_8(&via[B]) & TACK) == 0) {
1160                 if (--timeout < 0) {
1161                         printk(KERN_ERR "PMU not responding (!ack)\n");
1162                         return;
1163                 }
1164                 udelay(10);
1165         }
1166 }
1167
1168 /* New PMU seems to be very sensitive to those timings, so we make sure
1169  * PCI is flushed immediately */
1170 static inline void
1171 send_byte(int x)
1172 {
1173         volatile unsigned char __iomem *v = via;
1174
1175         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1176         out_8(&v[SR], x);
1177         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1178         (void)in_8(&v[B]);
1179 }
1180
1181 static inline void
1182 recv_byte(void)
1183 {
1184         volatile unsigned char __iomem *v = via;
1185
1186         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1187         in_8(&v[SR]);           /* resets SR */
1188         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1189         (void)in_8(&v[B]);
1190 }
1191
1192 static inline void
1193 pmu_done(struct adb_request *req)
1194 {
1195         void (*done)(struct adb_request *) = req->done;
1196         mb();
1197         req->complete = 1;
1198         /* Here, we assume that if the request has a done member, the
1199          * struct request will survive to setting req->complete to 1
1200          */
1201         if (done)
1202                 (*done)(req);
1203 }
1204
1205 static void
1206 pmu_start(void)
1207 {
1208         struct adb_request *req;
1209
1210         /* assert pmu_state == idle */
1211         /* get the packet to send */
1212         req = current_req;
1213         if (req == 0 || pmu_state != idle
1214             || (/*req->reply_expected && */req_awaiting_reply))
1215                 return;
1216
1217         pmu_state = sending;
1218         data_index = 1;
1219         data_len = pmu_data_len[req->data[0]][0];
1220
1221         /* Sounds safer to make sure ACK is high before writing. This helped
1222          * kill a problem with ADB and some iBooks
1223          */
1224         wait_for_ack();
1225         /* set the shift register to shift out and send a byte */
1226         send_byte(req->data[0]);
1227 }
1228
1229 void
1230 pmu_poll(void)
1231 {
1232         if (!via)
1233                 return;
1234         if (disable_poll)
1235                 return;
1236         via_pmu_interrupt(0, NULL, NULL);
1237 }
1238
1239 void
1240 pmu_poll_adb(void)
1241 {
1242         if (!via)
1243                 return;
1244         if (disable_poll)
1245                 return;
1246         /* Kicks ADB read when PMU is suspended */
1247         adb_int_pending = 1;
1248         do {
1249                 via_pmu_interrupt(0, NULL, NULL);
1250         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1251                 || req_awaiting_reply));
1252 }
1253
1254 void
1255 pmu_wait_complete(struct adb_request *req)
1256 {
1257         if (!via)
1258                 return;
1259         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1260                 via_pmu_interrupt(0, NULL, NULL);
1261 }
1262
1263 /* This function loops until the PMU is idle and prevents it from
1264  * anwsering to ADB interrupts. pmu_request can still be called.
1265  * This is done to avoid spurrious shutdowns when we know we'll have
1266  * interrupts switched off for a long time
1267  */
1268 void
1269 pmu_suspend(void)
1270 {
1271         unsigned long flags;
1272 #ifdef SUSPEND_USES_PMU
1273         struct adb_request *req;
1274 #endif
1275         if (!via)
1276                 return;
1277
1278         spin_lock_irqsave(&pmu_lock, flags);
1279         pmu_suspended++;
1280         if (pmu_suspended > 1) {
1281                 spin_unlock_irqrestore(&pmu_lock, flags);
1282                 return;
1283         }
1284
1285         do {
1286                 spin_unlock_irqrestore(&pmu_lock, flags);
1287                 if (req_awaiting_reply)
1288                         adb_int_pending = 1;
1289                 via_pmu_interrupt(0, NULL, NULL);
1290                 spin_lock_irqsave(&pmu_lock, flags);
1291                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1292 #ifdef SUSPEND_USES_PMU
1293                         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1294                         spin_unlock_irqrestore(&pmu_lock, flags);
1295                         while(!req.complete)
1296                                 pmu_poll();
1297 #else /* SUSPEND_USES_PMU */
1298                         if (gpio_irq >= 0)
1299                                 disable_irq_nosync(gpio_irq);
1300                         out_8(&via[IER], CB1_INT | IER_CLR);
1301                         spin_unlock_irqrestore(&pmu_lock, flags);
1302 #endif /* SUSPEND_USES_PMU */
1303                         break;
1304                 }
1305         } while (1);
1306 }
1307
1308 void
1309 pmu_resume(void)
1310 {
1311         unsigned long flags;
1312
1313         if (!via || (pmu_suspended < 1))
1314                 return;
1315
1316         spin_lock_irqsave(&pmu_lock, flags);
1317         pmu_suspended--;
1318         if (pmu_suspended > 0) {
1319                 spin_unlock_irqrestore(&pmu_lock, flags);
1320                 return;
1321         }
1322         adb_int_pending = 1;
1323 #ifdef SUSPEND_USES_PMU
1324         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1325         spin_unlock_irqrestore(&pmu_lock, flags);
1326         while(!req.complete)
1327                 pmu_poll();
1328 #else /* SUSPEND_USES_PMU */
1329         if (gpio_irq >= 0)
1330                 enable_irq(gpio_irq);
1331         out_8(&via[IER], CB1_INT | IER_SET);
1332         spin_unlock_irqrestore(&pmu_lock, flags);
1333         pmu_poll();
1334 #endif /* SUSPEND_USES_PMU */
1335 }
1336
1337 /* Interrupt data could be the result data from an ADB cmd */
1338 static void
1339 pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs)
1340 {
1341         unsigned char ints, pirq;
1342         int i = 0;
1343
1344         asleep = 0;
1345         if (drop_interrupts || len < 1) {
1346                 adb_int_pending = 0;
1347                 pmu_irq_stats[8]++;
1348                 return;
1349         }
1350
1351         /* Get PMU interrupt mask */
1352         ints = data[0];
1353
1354         /* Record zero interrupts for stats */
1355         if (ints == 0)
1356                 pmu_irq_stats[9]++;
1357
1358         /* Hack to deal with ADB autopoll flag */
1359         if (ints & PMU_INT_ADB)
1360                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1361
1362 next:
1363
1364         if (ints == 0) {
1365                 if (i > pmu_irq_stats[10])
1366                         pmu_irq_stats[10] = i;
1367                 return;
1368         }
1369
1370         for (pirq = 0; pirq < 8; pirq++)
1371                 if (ints & (1 << pirq))
1372                         break;
1373         pmu_irq_stats[pirq]++;
1374         i++;
1375         ints &= ~(1 << pirq);
1376
1377         /* Note: for some reason, we get an interrupt with len=1,
1378          * data[0]==0 after each normal ADB interrupt, at least
1379          * on the Pismo. Still investigating...  --BenH
1380          */
1381         if ((1 << pirq) & PMU_INT_ADB) {
1382                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1383                         struct adb_request *req = req_awaiting_reply;
1384                         if (req == 0) {
1385                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1386                                 return;
1387                         }
1388                         req_awaiting_reply = NULL;
1389                         if (len <= 2)
1390                                 req->reply_len = 0;
1391                         else {
1392                                 memcpy(req->reply, data + 1, len - 1);
1393                                 req->reply_len = len - 1;
1394                         }
1395                         pmu_done(req);
1396                 } else {
1397                         if (len == 4 && data[1] == 0x2c) {
1398                                 extern int xmon_wants_key, xmon_adb_keycode;
1399                                 if (xmon_wants_key) {
1400                                         xmon_adb_keycode = data[2];
1401                                         return;
1402                                 }
1403                         }
1404 #ifdef CONFIG_ADB
1405                         /*
1406                          * XXX On the [23]400 the PMU gives us an up
1407                          * event for keycodes 0x74 or 0x75 when the PC
1408                          * card eject buttons are released, so we
1409                          * ignore those events.
1410                          */
1411                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1412                               && data[1] == 0x2c && data[3] == 0xff
1413                               && (data[2] & ~1) == 0xf4))
1414                                 adb_input(data+1, len-1, regs, 1);
1415 #endif /* CONFIG_ADB */
1416                 }
1417         }
1418         /* Sound/brightness button pressed */
1419         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1420 #ifdef CONFIG_PMAC_BACKLIGHT
1421                 if (len == 3)
1422 #ifdef CONFIG_INPUT_ADBHID
1423                         if (!disable_kernel_backlight)
1424 #endif /* CONFIG_INPUT_ADBHID */
1425                                 set_backlight_level(data[1] >> 4);
1426 #endif /* CONFIG_PMAC_BACKLIGHT */
1427         }
1428         /* Tick interrupt */
1429         else if ((1 << pirq) & PMU_INT_TICK) {
1430                 /* Environement or tick interrupt, query batteries */
1431                 if (pmu_battery_count) {
1432                         if ((--query_batt_timer) == 0) {
1433                                 query_battery_state();
1434                                 query_batt_timer = BATTERY_POLLING_COUNT;
1435                         }
1436                 }
1437         }
1438         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1439                 if (pmu_battery_count)
1440                         query_battery_state();
1441                 pmu_pass_intr(data, len);
1442         } else {
1443                pmu_pass_intr(data, len);
1444         }
1445         goto next;
1446 }
1447
1448 static struct adb_request*
1449 pmu_sr_intr(struct pt_regs *regs)
1450 {
1451         struct adb_request *req;
1452         int bite = 0;
1453
1454         if (via[B] & TREQ) {
1455                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1456                 out_8(&via[IFR], SR_INT);
1457                 return NULL;
1458         }
1459         /* The ack may not yet be low when we get the interrupt */
1460         while ((in_8(&via[B]) & TACK) != 0)
1461                         ;
1462
1463         /* if reading grab the byte, and reset the interrupt */
1464         if (pmu_state == reading || pmu_state == reading_intr)
1465                 bite = in_8(&via[SR]);
1466
1467         /* reset TREQ and wait for TACK to go high */
1468         out_8(&via[B], in_8(&via[B]) | TREQ);
1469         wait_for_ack();
1470
1471         switch (pmu_state) {
1472         case sending:
1473                 req = current_req;
1474                 if (data_len < 0) {
1475                         data_len = req->nbytes - 1;
1476                         send_byte(data_len);
1477                         break;
1478                 }
1479                 if (data_index <= data_len) {
1480                         send_byte(req->data[data_index++]);
1481                         break;
1482                 }
1483                 req->sent = 1;
1484                 data_len = pmu_data_len[req->data[0]][1];
1485                 if (data_len == 0) {
1486                         pmu_state = idle;
1487                         current_req = req->next;
1488                         if (req->reply_expected)
1489                                 req_awaiting_reply = req;
1490                         else
1491                                 return req;
1492                 } else {
1493                         pmu_state = reading;
1494                         data_index = 0;
1495                         reply_ptr = req->reply + req->reply_len;
1496                         recv_byte();
1497                 }
1498                 break;
1499
1500         case intack:
1501                 data_index = 0;
1502                 data_len = -1;
1503                 pmu_state = reading_intr;
1504                 reply_ptr = interrupt_data[int_data_last];
1505                 recv_byte();
1506                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1507                         enable_irq(gpio_irq);
1508                         gpio_irq_enabled = 1;
1509                 }
1510                 break;
1511
1512         case reading:
1513         case reading_intr:
1514                 if (data_len == -1) {
1515                         data_len = bite;
1516                         if (bite > 32)
1517                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1518                 } else if (data_index < 32) {
1519                         reply_ptr[data_index++] = bite;
1520                 }
1521                 if (data_index < data_len) {
1522                         recv_byte();
1523                         break;
1524                 }
1525
1526                 if (pmu_state == reading_intr) {
1527                         pmu_state = idle;
1528                         int_data_state[int_data_last] = int_data_ready;
1529                         interrupt_data_len[int_data_last] = data_len;
1530                 } else {
1531                         req = current_req;
1532                         /*
1533                          * For PMU sleep and freq change requests, we lock the
1534                          * PMU until it's explicitely unlocked. This avoids any
1535                          * spurrious event polling getting in
1536                          */
1537                         current_req = req->next;
1538                         req->reply_len += data_index;
1539                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1540                                 pmu_state = locked;
1541                         else
1542                                 pmu_state = idle;
1543                         return req;
1544                 }
1545                 break;
1546
1547         default:
1548                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1549                        pmu_state);
1550         }
1551         return NULL;
1552 }
1553
1554 static irqreturn_t
1555 via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs)
1556 {
1557         unsigned long flags;
1558         int intr;
1559         int nloop = 0;
1560         int int_data = -1;
1561         struct adb_request *req = NULL;
1562         int handled = 0;
1563
1564         /* This is a bit brutal, we can probably do better */
1565         spin_lock_irqsave(&pmu_lock, flags);
1566         ++disable_poll;
1567
1568         for (;;) {
1569                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1570                 if (intr == 0)
1571                         break;
1572                 handled = 1;
1573                 if (++nloop > 1000) {
1574                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1575                                "intr=%x, ier=%x pmu_state=%d\n",
1576                                intr, in_8(&via[IER]), pmu_state);
1577                         break;
1578                 }
1579                 out_8(&via[IFR], intr);
1580                 if (intr & CB1_INT) {
1581                         adb_int_pending = 1;
1582                         pmu_irq_stats[0]++;
1583                 }
1584                 if (intr & SR_INT) {
1585                         req = pmu_sr_intr(regs);
1586                         if (req)
1587                                 break;
1588                 }
1589         }
1590
1591 recheck:
1592         if (pmu_state == idle) {
1593                 if (adb_int_pending) {
1594                         if (int_data_state[0] == int_data_empty)
1595                                 int_data_last = 0;
1596                         else if (int_data_state[1] == int_data_empty)
1597                                 int_data_last = 1;
1598                         else
1599                                 goto no_free_slot;
1600                         pmu_state = intack;
1601                         int_data_state[int_data_last] = int_data_fill;
1602                         /* Sounds safer to make sure ACK is high before writing.
1603                          * This helped kill a problem with ADB and some iBooks
1604                          */
1605                         wait_for_ack();
1606                         send_byte(PMU_INT_ACK);
1607                         adb_int_pending = 0;
1608                 } else if (current_req)
1609                         pmu_start();
1610         }
1611 no_free_slot:
1612         /* Mark the oldest buffer for flushing */
1613         if (int_data_state[!int_data_last] == int_data_ready) {
1614                 int_data_state[!int_data_last] = int_data_flush;
1615                 int_data = !int_data_last;
1616         } else if (int_data_state[int_data_last] == int_data_ready) {
1617                 int_data_state[int_data_last] = int_data_flush;
1618                 int_data = int_data_last;
1619         }
1620         --disable_poll;
1621         spin_unlock_irqrestore(&pmu_lock, flags);
1622
1623         /* Deal with completed PMU requests outside of the lock */
1624         if (req) {
1625                 pmu_done(req);
1626                 req = NULL;
1627         }
1628
1629         /* Deal with interrupt datas outside of the lock */
1630         if (int_data >= 0) {
1631                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs);
1632                 spin_lock_irqsave(&pmu_lock, flags);
1633                 ++disable_poll;
1634                 int_data_state[int_data] = int_data_empty;
1635                 int_data = -1;
1636                 goto recheck;
1637         }
1638
1639         return IRQ_RETVAL(handled);
1640 }
1641
1642 void
1643 pmu_unlock(void)
1644 {
1645         unsigned long flags;
1646
1647         spin_lock_irqsave(&pmu_lock, flags);
1648         if (pmu_state == locked)
1649                 pmu_state = idle;
1650         adb_int_pending = 1;
1651         spin_unlock_irqrestore(&pmu_lock, flags);
1652 }
1653
1654
1655 static irqreturn_t
1656 gpio1_interrupt(int irq, void *arg, struct pt_regs *regs)
1657 {
1658         unsigned long flags;
1659
1660         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1661                 spin_lock_irqsave(&pmu_lock, flags);
1662                 if (gpio_irq_enabled > 0) {
1663                         disable_irq_nosync(gpio_irq);
1664                         gpio_irq_enabled = 0;
1665                 }
1666                 pmu_irq_stats[1]++;
1667                 adb_int_pending = 1;
1668                 spin_unlock_irqrestore(&pmu_lock, flags);
1669                 via_pmu_interrupt(0, NULL, NULL);
1670                 return IRQ_HANDLED;
1671         }
1672         return IRQ_NONE;
1673 }
1674
1675 #ifdef CONFIG_PMAC_BACKLIGHT
1676 static int backlight_to_bright[] = {
1677         0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e,
1678         0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e
1679 };
1680
1681 static int
1682 pmu_set_backlight_enable(int on, int level, void* data)
1683 {
1684         struct adb_request req;
1685
1686         if (vias == NULL)
1687                 return -ENODEV;
1688
1689         if (on) {
1690                 pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
1691                             backlight_to_bright[level]);
1692                 pmu_wait_complete(&req);
1693         }
1694         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1695                     PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF));
1696         pmu_wait_complete(&req);
1697
1698         return 0;
1699 }
1700
1701 static void
1702 pmu_bright_complete(struct adb_request *req)
1703 {
1704         if (req == &bright_req_1)
1705                 clear_bit(1, &async_req_locks);
1706         if (req == &bright_req_2)
1707                 clear_bit(2, &async_req_locks);
1708 }
1709
1710 static int
1711 pmu_set_backlight_level(int level, void* data)
1712 {
1713         if (vias == NULL)
1714                 return -ENODEV;
1715
1716         if (test_and_set_bit(1, &async_req_locks))
1717                 return -EAGAIN;
1718         pmu_request(&bright_req_1, pmu_bright_complete, 2, PMU_BACKLIGHT_BRIGHT,
1719                 backlight_to_bright[level]);
1720         if (test_and_set_bit(2, &async_req_locks))
1721                 return -EAGAIN;
1722         pmu_request(&bright_req_2, pmu_bright_complete, 2, PMU_POWER_CTRL,
1723                     PMU_POW_BACKLIGHT | (level > BACKLIGHT_OFF ?
1724                                          PMU_POW_ON : PMU_POW_OFF));
1725
1726         return 0;
1727 }
1728 #endif /* CONFIG_PMAC_BACKLIGHT */
1729
1730 void
1731 pmu_enable_irled(int on)
1732 {
1733         struct adb_request req;
1734
1735         if (vias == NULL)
1736                 return ;
1737         if (pmu_kind == PMU_KEYLARGO_BASED)
1738                 return ;
1739
1740         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1741             (on ? PMU_POW_ON : PMU_POW_OFF));
1742         pmu_wait_complete(&req);
1743 }
1744
1745 void
1746 pmu_restart(void)
1747 {
1748         struct adb_request req;
1749
1750         if (via == NULL)
1751                 return;
1752
1753         local_irq_disable();
1754
1755         drop_interrupts = 1;
1756
1757         if (pmu_kind != PMU_KEYLARGO_BASED) {
1758                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1759                                                 PMU_INT_TICK );
1760                 while(!req.complete)
1761                         pmu_poll();
1762         }
1763
1764         pmu_request(&req, NULL, 1, PMU_RESET);
1765         pmu_wait_complete(&req);
1766         for (;;)
1767                 ;
1768 }
1769
1770 void
1771 pmu_shutdown(void)
1772 {
1773         struct adb_request req;
1774
1775         if (via == NULL)
1776                 return;
1777
1778         local_irq_disable();
1779
1780         drop_interrupts = 1;
1781
1782         if (pmu_kind != PMU_KEYLARGO_BASED) {
1783                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1784                                                 PMU_INT_TICK );
1785                 pmu_wait_complete(&req);
1786         } else {
1787                 /* Disable server mode on shutdown or we'll just
1788                  * wake up again
1789                  */
1790                 pmu_set_server_mode(0);
1791         }
1792
1793         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1794                     'M', 'A', 'T', 'T');
1795         pmu_wait_complete(&req);
1796         for (;;)
1797                 ;
1798 }
1799
1800 int
1801 pmu_present(void)
1802 {
1803         return via != 0;
1804 }
1805
1806 #ifdef CONFIG_PM
1807
1808 static LIST_HEAD(sleep_notifiers);
1809
1810 int
1811 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
1812 {
1813         struct list_head *list;
1814         struct pmu_sleep_notifier *notifier;
1815
1816         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1817              list = list->next) {
1818                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1819                 if (n->priority > notifier->priority)
1820                         break;
1821         }
1822         __list_add(&n->list, list->prev, list);
1823         return 0;
1824 }
1825 EXPORT_SYMBOL(pmu_register_sleep_notifier);
1826
1827 int
1828 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
1829 {
1830         if (n->list.next == 0)
1831                 return -ENOENT;
1832         list_del(&n->list);
1833         n->list.next = NULL;
1834         return 0;
1835 }
1836 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
1837 #endif /* CONFIG_PM */
1838
1839 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1840
1841 /* Sleep is broadcast last-to-first */
1842 static int
1843 broadcast_sleep(int when, int fallback)
1844 {
1845         int ret = PBOOK_SLEEP_OK;
1846         struct list_head *list;
1847         struct pmu_sleep_notifier *notifier;
1848
1849         for (list = sleep_notifiers.prev; list != &sleep_notifiers;
1850              list = list->prev) {
1851                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1852                 ret = notifier->notifier_call(notifier, when);
1853                 if (ret != PBOOK_SLEEP_OK) {
1854                         printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
1855                                when, notifier, notifier->notifier_call);
1856                         for (; list != &sleep_notifiers; list = list->next) {
1857                                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1858                                 notifier->notifier_call(notifier, fallback);
1859                         }
1860                         return ret;
1861                 }
1862         }
1863         return ret;
1864 }
1865
1866 /* Wake is broadcast first-to-last */
1867 static int
1868 broadcast_wake(void)
1869 {
1870         int ret = PBOOK_SLEEP_OK;
1871         struct list_head *list;
1872         struct pmu_sleep_notifier *notifier;
1873
1874         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1875              list = list->next) {
1876                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1877                 notifier->notifier_call(notifier, PBOOK_WAKE);
1878         }
1879         return ret;
1880 }
1881
1882 /*
1883  * This struct is used to store config register values for
1884  * PCI devices which may get powered off when we sleep.
1885  */
1886 static struct pci_save {
1887 #ifndef HACKED_PCI_SAVE
1888         u16     command;
1889         u16     cache_lat;
1890         u16     intr;
1891         u32     rom_address;
1892 #else
1893         u32     config[16];
1894 #endif
1895 } *pbook_pci_saves;
1896 static int pbook_npci_saves;
1897
1898 static void
1899 pbook_alloc_pci_save(void)
1900 {
1901         int npci;
1902         struct pci_dev *pd = NULL;
1903
1904         npci = 0;
1905         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1906                 ++npci;
1907         }
1908         if (npci == 0)
1909                 return;
1910         pbook_pci_saves = (struct pci_save *)
1911                 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
1912         pbook_npci_saves = npci;
1913 }
1914
1915 static void
1916 pbook_free_pci_save(void)
1917 {
1918         if (pbook_pci_saves == NULL)
1919                 return;
1920         kfree(pbook_pci_saves);
1921         pbook_pci_saves = NULL;
1922         pbook_npci_saves = 0;
1923 }
1924
1925 static void
1926 pbook_pci_save(void)
1927 {
1928         struct pci_save *ps = pbook_pci_saves;
1929         struct pci_dev *pd = NULL;
1930         int npci = pbook_npci_saves;
1931
1932         if (ps == NULL)
1933                 return;
1934
1935         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1936                 if (npci-- == 0)
1937                         return;
1938 #ifndef HACKED_PCI_SAVE
1939                 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
1940                 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
1941                 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
1942                 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
1943 #else
1944                 int i;
1945                 for (i=1;i<16;i++)
1946                         pci_read_config_dword(pd, i<<4, &ps->config[i]);
1947 #endif
1948                 ++ps;
1949         }
1950 }
1951
1952 /* For this to work, we must take care of a few things: If gmac was enabled
1953  * during boot, it will be in the pci dev list. If it's disabled at this point
1954  * (and it will probably be), then you can't access it's config space.
1955  */
1956 static void
1957 pbook_pci_restore(void)
1958 {
1959         u16 cmd;
1960         struct pci_save *ps = pbook_pci_saves - 1;
1961         struct pci_dev *pd = NULL;
1962         int npci = pbook_npci_saves;
1963         int j;
1964
1965         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1966 #ifdef HACKED_PCI_SAVE
1967                 int i;
1968                 if (npci-- == 0)
1969                         return;
1970                 ps++;
1971                 for (i=2;i<16;i++)
1972                         pci_write_config_dword(pd, i<<4, ps->config[i]);
1973                 pci_write_config_dword(pd, 4, ps->config[1]);
1974 #else
1975                 if (npci-- == 0)
1976                         return;
1977                 ps++;
1978                 if (ps->command == 0)
1979                         continue;
1980                 pci_read_config_word(pd, PCI_COMMAND, &cmd);
1981                 if ((ps->command & ~cmd) == 0)
1982                         continue;
1983                 switch (pd->hdr_type) {
1984                 case PCI_HEADER_TYPE_NORMAL:
1985                         for (j = 0; j < 6; ++j)
1986                                 pci_write_config_dword(pd,
1987                                         PCI_BASE_ADDRESS_0 + j*4,
1988                                         pd->resource[j].start);
1989                         pci_write_config_dword(pd, PCI_ROM_ADDRESS,
1990                                 ps->rom_address);
1991                         pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
1992                                 ps->cache_lat);
1993                         pci_write_config_word(pd, PCI_INTERRUPT_LINE,
1994                                 ps->intr);
1995                         pci_write_config_word(pd, PCI_COMMAND, ps->command);
1996                         break;
1997                 }
1998 #endif
1999         }
2000 }
2001
2002 #ifdef DEBUG_SLEEP
2003 /* N.B. This doesn't work on the 3400 */
2004 void
2005 pmu_blink(int n)
2006 {
2007         struct adb_request req;
2008
2009         memset(&req, 0, sizeof(req));
2010
2011         for (; n > 0; --n) {
2012                 req.nbytes = 4;
2013                 req.done = NULL;
2014                 req.data[0] = 0xee;
2015                 req.data[1] = 4;
2016                 req.data[2] = 0;
2017                 req.data[3] = 1;
2018                 req.reply[0] = ADB_RET_OK;
2019                 req.reply_len = 1;
2020                 req.reply_expected = 0;
2021                 pmu_polled_request(&req);
2022                 mdelay(50);
2023                 req.nbytes = 4;
2024                 req.done = NULL;
2025                 req.data[0] = 0xee;
2026                 req.data[1] = 4;
2027                 req.data[2] = 0;
2028                 req.data[3] = 0;
2029                 req.reply[0] = ADB_RET_OK;
2030                 req.reply_len = 1;
2031                 req.reply_expected = 0;
2032                 pmu_polled_request(&req);
2033                 mdelay(50);
2034         }
2035         mdelay(50);
2036 }
2037 #endif
2038
2039 /*
2040  * Put the powerbook to sleep.
2041  */
2042
2043 static u32 save_via[8];
2044
2045 static void
2046 save_via_state(void)
2047 {
2048         save_via[0] = in_8(&via[ANH]);
2049         save_via[1] = in_8(&via[DIRA]);
2050         save_via[2] = in_8(&via[B]);
2051         save_via[3] = in_8(&via[DIRB]);
2052         save_via[4] = in_8(&via[PCR]);
2053         save_via[5] = in_8(&via[ACR]);
2054         save_via[6] = in_8(&via[T1CL]);
2055         save_via[7] = in_8(&via[T1CH]);
2056 }
2057 static void
2058 restore_via_state(void)
2059 {
2060         out_8(&via[ANH], save_via[0]);
2061         out_8(&via[DIRA], save_via[1]);
2062         out_8(&via[B], save_via[2]);
2063         out_8(&via[DIRB], save_via[3]);
2064         out_8(&via[PCR], save_via[4]);
2065         out_8(&via[ACR], save_via[5]);
2066         out_8(&via[T1CL], save_via[6]);
2067         out_8(&via[T1CH], save_via[7]);
2068         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
2069         out_8(&via[IFR], 0x7f);                         /* clear IFR */
2070         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
2071 }
2072
2073 static int
2074 pmac_suspend_devices(void)
2075 {
2076         int ret;
2077
2078         pm_prepare_console();
2079
2080         /* Notify old-style device drivers & userland */
2081         ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
2082         if (ret != PBOOK_SLEEP_OK) {
2083                 printk(KERN_ERR "Sleep rejected by drivers\n");
2084                 return -EBUSY;
2085         }
2086
2087         /* Sync the disks. */
2088         /* XXX It would be nice to have some way to ensure that
2089          * nobody is dirtying any new buffers while we wait. That
2090          * could be achieved using the refrigerator for processes
2091          * that swsusp uses
2092          */
2093         sys_sync();
2094
2095         /* Sleep can fail now. May not be very robust but useful for debugging */
2096         ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
2097         if (ret != PBOOK_SLEEP_OK) {
2098                 printk(KERN_ERR "Driver sleep failed\n");
2099                 return -EBUSY;
2100         }
2101
2102         /* Send suspend call to devices, hold the device core's dpm_sem */
2103         ret = device_suspend(PMSG_SUSPEND);
2104         if (ret) {
2105                 broadcast_wake();
2106                 printk(KERN_ERR "Driver sleep failed\n");
2107                 return -EBUSY;
2108         }
2109
2110         /* Call platform functions marked "on sleep" */
2111         pmac_pfunc_i2c_suspend();
2112         pmac_pfunc_base_suspend();
2113
2114         /* Stop preemption */
2115         preempt_disable();
2116
2117         /* Make sure the decrementer won't interrupt us */
2118         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2119         /* Make sure any pending DEC interrupt occurring while we did
2120          * the above didn't re-enable the DEC */
2121         mb();
2122         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2123
2124         /* We can now disable MSR_EE. This code of course works properly only
2125          * on UP machines... For SMP, if we ever implement sleep, we'll have to
2126          * stop the "other" CPUs way before we do all that stuff.
2127          */
2128         local_irq_disable();
2129
2130         /* Broadcast power down irq
2131          * This isn't that useful in most cases (only directly wired devices can
2132          * use this but still... This will take care of sysdev's as well, so
2133          * we exit from here with local irqs disabled and PIC off.
2134          */
2135         ret = device_power_down(PMSG_SUSPEND);
2136         if (ret) {
2137                 wakeup_decrementer();
2138                 local_irq_enable();
2139                 preempt_enable();
2140                 device_resume();
2141                 broadcast_wake();
2142                 printk(KERN_ERR "Driver powerdown failed\n");
2143                 return -EBUSY;
2144         }
2145
2146         /* Wait for completion of async backlight requests */
2147         while (!bright_req_1.complete || !bright_req_2.complete ||
2148                         !batt_req.complete)
2149                 pmu_poll();
2150
2151         /* Giveup the lazy FPU & vec so we don't have to back them
2152          * up from the low level code
2153          */
2154         enable_kernel_fp();
2155
2156 #ifdef CONFIG_ALTIVEC
2157         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2158                 enable_kernel_altivec();
2159 #endif /* CONFIG_ALTIVEC */
2160
2161         return 0;
2162 }
2163
2164 static int
2165 pmac_wakeup_devices(void)
2166 {
2167         mdelay(100);
2168
2169         /* Power back up system devices (including the PIC) */
2170         device_power_up();
2171
2172         /* Force a poll of ADB interrupts */
2173         adb_int_pending = 1;
2174         via_pmu_interrupt(0, NULL, NULL);
2175
2176         /* Restart jiffies & scheduling */
2177         wakeup_decrementer();
2178
2179         /* Re-enable local CPU interrupts */
2180         local_irq_enable();
2181         mdelay(10);
2182         preempt_enable();
2183
2184         /* Call platform functions marked "on wake" */
2185         pmac_pfunc_base_resume();
2186         pmac_pfunc_i2c_resume();
2187
2188         /* Resume devices */
2189         device_resume();
2190
2191         /* Notify old style drivers */
2192         broadcast_wake();
2193
2194         pm_restore_console();
2195
2196         return 0;
2197 }
2198
2199 #define GRACKLE_PM      (1<<7)
2200 #define GRACKLE_DOZE    (1<<5)
2201 #define GRACKLE_NAP     (1<<4)
2202 #define GRACKLE_SLEEP   (1<<3)
2203
2204 int
2205 powerbook_sleep_grackle(void)
2206 {
2207         unsigned long save_l2cr;
2208         unsigned short pmcr1;
2209         struct adb_request req;
2210         int ret;
2211         struct pci_dev *grackle;
2212
2213         grackle = pci_find_slot(0, 0);
2214         if (!grackle)
2215                 return -ENODEV;
2216
2217         ret = pmac_suspend_devices();
2218         if (ret) {
2219                 printk(KERN_ERR "Sleep rejected by devices\n");
2220                 return ret;
2221         }
2222
2223         /* Turn off various things. Darwin does some retry tests here... */
2224         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2225         pmu_wait_complete(&req);
2226         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2227                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2228         pmu_wait_complete(&req);
2229
2230         /* For 750, save backside cache setting and disable it */
2231         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2232
2233         if (!__fake_sleep) {
2234                 /* Ask the PMU to put us to sleep */
2235                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2236                 pmu_wait_complete(&req);
2237         }
2238
2239         /* The VIA is supposed not to be restored correctly*/
2240         save_via_state();
2241         /* We shut down some HW */
2242         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2243
2244         pci_read_config_word(grackle, 0x70, &pmcr1);
2245         /* Apparently, MacOS uses NAP mode for Grackle ??? */
2246         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2247         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2248         pci_write_config_word(grackle, 0x70, pmcr1);
2249
2250         /* Call low-level ASM sleep handler */
2251         if (__fake_sleep)
2252                 mdelay(5000);
2253         else
2254                 low_sleep_handler();
2255
2256         /* We're awake again, stop grackle PM */
2257         pci_read_config_word(grackle, 0x70, &pmcr1);
2258         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2259         pci_write_config_word(grackle, 0x70, pmcr1);
2260
2261         /* Make sure the PMU is idle */
2262         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2263         restore_via_state();
2264
2265         /* Restore L2 cache */
2266         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2267                 _set_L2CR(save_l2cr);
2268
2269         /* Restore userland MMU context */
2270         set_context(current->active_mm->context, current->active_mm->pgd);
2271
2272         /* Power things up */
2273         pmu_unlock();
2274         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2275         pmu_wait_complete(&req);
2276         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2277                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2278         pmu_wait_complete(&req);
2279         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2280                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2281         pmu_wait_complete(&req);
2282
2283         pmac_wakeup_devices();
2284
2285         return 0;
2286 }
2287
2288 static int
2289 powerbook_sleep_Core99(void)
2290 {
2291         unsigned long save_l2cr;
2292         unsigned long save_l3cr;
2293         struct adb_request req;
2294         int ret;
2295
2296         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2297                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2298                 return -ENOSYS;
2299         }
2300
2301         if (num_online_cpus() > 1 || cpu_is_offline(0))
2302                 return -EAGAIN;
2303
2304         ret = pmac_suspend_devices();
2305         if (ret) {
2306                 printk(KERN_ERR "Sleep rejected by devices\n");
2307                 return ret;
2308         }
2309
2310         /* Stop environment and ADB interrupts */
2311         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2312         pmu_wait_complete(&req);
2313
2314         /* Tell PMU what events will wake us up */
2315         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2316                 0xff, 0xff);
2317         pmu_wait_complete(&req);
2318         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2319                 0, PMU_PWR_WAKEUP_KEY |
2320                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2321         pmu_wait_complete(&req);
2322
2323         /* Save the state of the L2 and L3 caches */
2324         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
2325         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2326
2327         if (!__fake_sleep) {
2328                 /* Ask the PMU to put us to sleep */
2329                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2330                 pmu_wait_complete(&req);
2331         }
2332
2333         /* The VIA is supposed not to be restored correctly*/
2334         save_via_state();
2335
2336         /* Shut down various ASICs. There's a chance that we can no longer
2337          * talk to the PMU after this, so I moved it to _after_ sending the
2338          * sleep command to it. Still need to be checked.
2339          */
2340         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2341
2342         /* Call low-level ASM sleep handler */
2343         if (__fake_sleep)
2344                 mdelay(5000);
2345         else
2346                 low_sleep_handler();
2347
2348         /* Restore Apple core ASICs state */
2349         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2350
2351         /* Restore VIA */
2352         restore_via_state();
2353
2354         /* tweak LPJ before cpufreq is there */
2355         loops_per_jiffy *= 2;
2356
2357         /* Restore video */
2358         pmac_call_early_video_resume();
2359
2360         /* Restore L2 cache */
2361         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2362                 _set_L2CR(save_l2cr);
2363         /* Restore L3 cache */
2364         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2365                 _set_L3CR(save_l3cr);
2366
2367         /* Restore userland MMU context */
2368         set_context(current->active_mm->context, current->active_mm->pgd);
2369
2370         /* Tell PMU we are ready */
2371         pmu_unlock();
2372         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2373         pmu_wait_complete(&req);
2374         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2375         pmu_wait_complete(&req);
2376
2377         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2378         loops_per_jiffy /= 2;
2379
2380         pmac_wakeup_devices();
2381
2382         return 0;
2383 }
2384
2385 #define PB3400_MEM_CTRL         0xf8000000
2386 #define PB3400_MEM_CTRL_SLEEP   0x70
2387
2388 static int
2389 powerbook_sleep_3400(void)
2390 {
2391         int ret, i, x;
2392         unsigned int hid0;
2393         unsigned long p;
2394         struct adb_request sleep_req;
2395         void __iomem *mem_ctrl;
2396         unsigned int __iomem *mem_ctrl_sleep;
2397
2398         /* first map in the memory controller registers */
2399         mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2400         if (mem_ctrl == NULL) {
2401                 printk("powerbook_sleep_3400: ioremap failed\n");
2402                 return -ENOMEM;
2403         }
2404         mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2405
2406         /* Allocate room for PCI save */
2407         pbook_alloc_pci_save();
2408
2409         ret = pmac_suspend_devices();
2410         if (ret) {
2411                 pbook_free_pci_save();
2412                 printk(KERN_ERR "Sleep rejected by devices\n");
2413                 return ret;
2414         }
2415
2416         /* Save the state of PCI config space for some slots */
2417         pbook_pci_save();
2418
2419         /* Set the memory controller to keep the memory refreshed
2420            while we're asleep */
2421         for (i = 0x403f; i >= 0x4000; --i) {
2422                 out_be32(mem_ctrl_sleep, i);
2423                 do {
2424                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2425                 } while (x == 0);
2426                 if (x >= 0x100)
2427                         break;
2428         }
2429
2430         /* Ask the PMU to put us to sleep */
2431         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2432         while (!sleep_req.complete)
2433                 mb();
2434
2435         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2436
2437         /* displacement-flush the L2 cache - necessary? */
2438         for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2439                 i = *(volatile int *)p;
2440         asleep = 1;
2441
2442         /* Put the CPU into sleep mode */
2443         hid0 = mfspr(SPRN_HID0);
2444         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2445         mtspr(SPRN_HID0, hid0);
2446         mtmsr(mfmsr() | MSR_POW | MSR_EE);
2447         udelay(10);
2448
2449         /* OK, we're awake again, start restoring things */
2450         out_be32(mem_ctrl_sleep, 0x3f);
2451         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2452         pbook_pci_restore();
2453         pmu_unlock();
2454
2455         /* wait for the PMU interrupt sequence to complete */
2456         while (asleep)
2457                 mb();
2458
2459         pmac_wakeup_devices();
2460         pbook_free_pci_save();
2461         iounmap(mem_ctrl);
2462
2463         return 0;
2464 }
2465
2466 #endif /* CONFIG_PM && CONFIG_PPC32 */
2467
2468 /*
2469  * Support for /dev/pmu device
2470  */
2471 #define RB_SIZE         0x10
2472 struct pmu_private {
2473         struct list_head list;
2474         int     rb_get;
2475         int     rb_put;
2476         struct rb_entry {
2477                 unsigned short len;
2478                 unsigned char data[16];
2479         }       rb_buf[RB_SIZE];
2480         wait_queue_head_t wait;
2481         spinlock_t lock;
2482 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2483         int     backlight_locker;
2484 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2485 };
2486
2487 static LIST_HEAD(all_pmu_pvt);
2488 static DEFINE_SPINLOCK(all_pvt_lock);
2489
2490 static void
2491 pmu_pass_intr(unsigned char *data, int len)
2492 {
2493         struct pmu_private *pp;
2494         struct list_head *list;
2495         int i;
2496         unsigned long flags;
2497
2498         if (len > sizeof(pp->rb_buf[0].data))
2499                 len = sizeof(pp->rb_buf[0].data);
2500         spin_lock_irqsave(&all_pvt_lock, flags);
2501         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2502                 pp = list_entry(list, struct pmu_private, list);
2503                 spin_lock(&pp->lock);
2504                 i = pp->rb_put + 1;
2505                 if (i >= RB_SIZE)
2506                         i = 0;
2507                 if (i != pp->rb_get) {
2508                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2509                         rp->len = len;
2510                         memcpy(rp->data, data, len);
2511                         pp->rb_put = i;
2512                         wake_up_interruptible(&pp->wait);
2513                 }
2514                 spin_unlock(&pp->lock);
2515         }
2516         spin_unlock_irqrestore(&all_pvt_lock, flags);
2517 }
2518
2519 static int
2520 pmu_open(struct inode *inode, struct file *file)
2521 {
2522         struct pmu_private *pp;
2523         unsigned long flags;
2524
2525         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2526         if (pp == 0)
2527                 return -ENOMEM;
2528         pp->rb_get = pp->rb_put = 0;
2529         spin_lock_init(&pp->lock);
2530         init_waitqueue_head(&pp->wait);
2531         spin_lock_irqsave(&all_pvt_lock, flags);
2532 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2533         pp->backlight_locker = 0;
2534 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2535         list_add(&pp->list, &all_pmu_pvt);
2536         spin_unlock_irqrestore(&all_pvt_lock, flags);
2537         file->private_data = pp;
2538         return 0;
2539 }
2540
2541 static ssize_t
2542 pmu_read(struct file *file, char __user *buf,
2543                         size_t count, loff_t *ppos)
2544 {
2545         struct pmu_private *pp = file->private_data;
2546         DECLARE_WAITQUEUE(wait, current);
2547         unsigned long flags;
2548         int ret = 0;
2549
2550         if (count < 1 || pp == 0)
2551                 return -EINVAL;
2552         if (!access_ok(VERIFY_WRITE, buf, count))
2553                 return -EFAULT;
2554
2555         spin_lock_irqsave(&pp->lock, flags);
2556         add_wait_queue(&pp->wait, &wait);
2557         current->state = TASK_INTERRUPTIBLE;
2558
2559         for (;;) {
2560                 ret = -EAGAIN;
2561                 if (pp->rb_get != pp->rb_put) {
2562                         int i = pp->rb_get;
2563                         struct rb_entry *rp = &pp->rb_buf[i];
2564                         ret = rp->len;
2565                         spin_unlock_irqrestore(&pp->lock, flags);
2566                         if (ret > count)
2567                                 ret = count;
2568                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2569                                 ret = -EFAULT;
2570                         if (++i >= RB_SIZE)
2571                                 i = 0;
2572                         spin_lock_irqsave(&pp->lock, flags);
2573                         pp->rb_get = i;
2574                 }
2575                 if (ret >= 0)
2576                         break;
2577                 if (file->f_flags & O_NONBLOCK)
2578                         break;
2579                 ret = -ERESTARTSYS;
2580                 if (signal_pending(current))
2581                         break;
2582                 spin_unlock_irqrestore(&pp->lock, flags);
2583                 schedule();
2584                 spin_lock_irqsave(&pp->lock, flags);
2585         }
2586         current->state = TASK_RUNNING;
2587         remove_wait_queue(&pp->wait, &wait);
2588         spin_unlock_irqrestore(&pp->lock, flags);
2589
2590         return ret;
2591 }
2592
2593 static ssize_t
2594 pmu_write(struct file *file, const char __user *buf,
2595                          size_t count, loff_t *ppos)
2596 {
2597         return 0;
2598 }
2599
2600 static unsigned int
2601 pmu_fpoll(struct file *filp, poll_table *wait)
2602 {
2603         struct pmu_private *pp = filp->private_data;
2604         unsigned int mask = 0;
2605         unsigned long flags;
2606
2607         if (pp == 0)
2608                 return 0;
2609         poll_wait(filp, &pp->wait, wait);
2610         spin_lock_irqsave(&pp->lock, flags);
2611         if (pp->rb_get != pp->rb_put)
2612                 mask |= POLLIN;
2613         spin_unlock_irqrestore(&pp->lock, flags);
2614         return mask;
2615 }
2616
2617 static int
2618 pmu_release(struct inode *inode, struct file *file)
2619 {
2620         struct pmu_private *pp = file->private_data;
2621         unsigned long flags;
2622
2623         lock_kernel();
2624         if (pp != 0) {
2625                 file->private_data = NULL;
2626                 spin_lock_irqsave(&all_pvt_lock, flags);
2627                 list_del(&pp->list);
2628                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2629 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2630                 if (pp->backlight_locker) {
2631                         spin_lock_irqsave(&pmu_lock, flags);
2632                         disable_kernel_backlight--;
2633                         spin_unlock_irqrestore(&pmu_lock, flags);
2634                 }
2635 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2636                 kfree(pp);
2637         }
2638         unlock_kernel();
2639         return 0;
2640 }
2641
2642 static int
2643 pmu_ioctl(struct inode * inode, struct file *filp,
2644                      u_int cmd, u_long arg)
2645 {
2646         __u32 __user *argp = (__u32 __user *)arg;
2647         int error = -EINVAL;
2648
2649         switch (cmd) {
2650 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2651         case PMU_IOC_SLEEP:
2652                 if (!capable(CAP_SYS_ADMIN))
2653                         return -EACCES;
2654                 if (sleep_in_progress)
2655                         return -EBUSY;
2656                 sleep_in_progress = 1;
2657                 switch (pmu_kind) {
2658                 case PMU_OHARE_BASED:
2659                         error = powerbook_sleep_3400();
2660                         break;
2661                 case PMU_HEATHROW_BASED:
2662                 case PMU_PADDINGTON_BASED:
2663                         error = powerbook_sleep_grackle();
2664                         break;
2665                 case PMU_KEYLARGO_BASED:
2666                         error = powerbook_sleep_Core99();
2667                         break;
2668                 default:
2669                         error = -ENOSYS;
2670                 }
2671                 sleep_in_progress = 0;
2672                 break;
2673         case PMU_IOC_CAN_SLEEP:
2674                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2675                         return put_user(0, argp);
2676                 else
2677                         return put_user(1, argp);
2678 #endif /* CONFIG_PM && CONFIG_PPC32 */
2679
2680 #ifdef CONFIG_PMAC_BACKLIGHT
2681         /* Backlight should have its own device or go via
2682          * the fbdev
2683          */
2684         case PMU_IOC_GET_BACKLIGHT:
2685                 if (sleep_in_progress)
2686                         return -EBUSY;
2687                 error = get_backlight_level();
2688                 if (error < 0)
2689                         return error;
2690                 return put_user(error, argp);
2691         case PMU_IOC_SET_BACKLIGHT:
2692         {
2693                 __u32 value;
2694                 if (sleep_in_progress)
2695                         return -EBUSY;
2696                 error = get_user(value, argp);
2697                 if (!error)
2698                         error = set_backlight_level(value);
2699                 break;
2700         }
2701 #ifdef CONFIG_INPUT_ADBHID
2702         case PMU_IOC_GRAB_BACKLIGHT: {
2703                 struct pmu_private *pp = filp->private_data;
2704                 unsigned long flags;
2705
2706                 if (pp->backlight_locker)
2707                         return 0;
2708                 pp->backlight_locker = 1;
2709                 spin_lock_irqsave(&pmu_lock, flags);
2710                 disable_kernel_backlight++;
2711                 spin_unlock_irqrestore(&pmu_lock, flags);
2712                 return 0;
2713         }
2714 #endif /* CONFIG_INPUT_ADBHID */
2715 #endif /* CONFIG_PMAC_BACKLIGHT */
2716         case PMU_IOC_GET_MODEL:
2717                 return put_user(pmu_kind, argp);
2718         case PMU_IOC_HAS_ADB:
2719                 return put_user(pmu_has_adb, argp);
2720         }
2721         return error;
2722 }
2723
2724 static struct file_operations pmu_device_fops = {
2725         .read           = pmu_read,
2726         .write          = pmu_write,
2727         .poll           = pmu_fpoll,
2728         .ioctl          = pmu_ioctl,
2729         .open           = pmu_open,
2730         .release        = pmu_release,
2731 };
2732
2733 static struct miscdevice pmu_device = {
2734         PMU_MINOR, "pmu", &pmu_device_fops
2735 };
2736
2737 static int pmu_device_init(void)
2738 {
2739         if (!via)
2740                 return 0;
2741         if (misc_register(&pmu_device) < 0)
2742                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2743         return 0;
2744 }
2745 device_initcall(pmu_device_init);
2746
2747
2748 #ifdef DEBUG_SLEEP
2749 static inline void
2750 polled_handshake(volatile unsigned char __iomem *via)
2751 {
2752         via[B] &= ~TREQ; eieio();
2753         while ((via[B] & TACK) != 0)
2754                 ;
2755         via[B] |= TREQ; eieio();
2756         while ((via[B] & TACK) == 0)
2757                 ;
2758 }
2759
2760 static inline void
2761 polled_send_byte(volatile unsigned char __iomem *via, int x)
2762 {
2763         via[ACR] |= SR_OUT | SR_EXT; eieio();
2764         via[SR] = x; eieio();
2765         polled_handshake(via);
2766 }
2767
2768 static inline int
2769 polled_recv_byte(volatile unsigned char __iomem *via)
2770 {
2771         int x;
2772
2773         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2774         x = via[SR]; eieio();
2775         polled_handshake(via);
2776         x = via[SR]; eieio();
2777         return x;
2778 }
2779
2780 int
2781 pmu_polled_request(struct adb_request *req)
2782 {
2783         unsigned long flags;
2784         int i, l, c;
2785         volatile unsigned char __iomem *v = via;
2786
2787         req->complete = 1;
2788         c = req->data[0];
2789         l = pmu_data_len[c][0];
2790         if (l >= 0 && req->nbytes != l + 1)
2791                 return -EINVAL;
2792
2793         local_irq_save(flags);
2794         while (pmu_state != idle)
2795                 pmu_poll();
2796
2797         while ((via[B] & TACK) == 0)
2798                 ;
2799         polled_send_byte(v, c);
2800         if (l < 0) {
2801                 l = req->nbytes - 1;
2802                 polled_send_byte(v, l);
2803         }
2804         for (i = 1; i <= l; ++i)
2805                 polled_send_byte(v, req->data[i]);
2806
2807         l = pmu_data_len[c][1];
2808         if (l < 0)
2809                 l = polled_recv_byte(v);
2810         for (i = 0; i < l; ++i)
2811                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2812
2813         if (req->done)
2814                 (*req->done)(req);
2815
2816         local_irq_restore(flags);
2817         return 0;
2818 }
2819 #endif /* DEBUG_SLEEP */
2820
2821
2822 /* FIXME: This is a temporary set of callbacks to enable us
2823  * to do suspend-to-disk.
2824  */
2825
2826 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2827
2828 static int pmu_sys_suspended = 0;
2829
2830 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2831 {
2832         if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2833                 return 0;
2834
2835         /* Suspend PMU event interrupts */
2836         pmu_suspend();
2837
2838         pmu_sys_suspended = 1;
2839         return 0;
2840 }
2841
2842 static int pmu_sys_resume(struct sys_device *sysdev)
2843 {
2844         struct adb_request req;
2845
2846         if (!pmu_sys_suspended)
2847                 return 0;
2848
2849         /* Tell PMU we are ready */
2850         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2851         pmu_wait_complete(&req);
2852
2853         /* Resume PMU event interrupts */
2854         pmu_resume();
2855
2856         pmu_sys_suspended = 0;
2857
2858         return 0;
2859 }
2860
2861 #endif /* CONFIG_PM && CONFIG_PPC32 */
2862
2863 static struct sysdev_class pmu_sysclass = {
2864         set_kset_name("pmu"),
2865 };
2866
2867 static struct sys_device device_pmu = {
2868         .id             = 0,
2869         .cls            = &pmu_sysclass,
2870 };
2871
2872 static struct sysdev_driver driver_pmu = {
2873 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2874         .suspend        = &pmu_sys_suspend,
2875         .resume         = &pmu_sys_resume,
2876 #endif /* CONFIG_PM && CONFIG_PPC32 */
2877 };
2878
2879 static int __init init_pmu_sysfs(void)
2880 {
2881         int rc;
2882
2883         rc = sysdev_class_register(&pmu_sysclass);
2884         if (rc) {
2885                 printk(KERN_ERR "Failed registering PMU sys class\n");
2886                 return -ENODEV;
2887         }
2888         rc = sysdev_register(&device_pmu);
2889         if (rc) {
2890                 printk(KERN_ERR "Failed registering PMU sys device\n");
2891                 return -ENODEV;
2892         }
2893         rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2894         if (rc) {
2895                 printk(KERN_ERR "Failed registering PMU sys driver\n");
2896                 return -ENODEV;
2897         }
2898         return 0;
2899 }
2900
2901 subsys_initcall(init_pmu_sysfs);
2902
2903 EXPORT_SYMBOL(pmu_request);
2904 EXPORT_SYMBOL(pmu_queue_request);
2905 EXPORT_SYMBOL(pmu_poll);
2906 EXPORT_SYMBOL(pmu_poll_adb);
2907 EXPORT_SYMBOL(pmu_wait_complete);
2908 EXPORT_SYMBOL(pmu_suspend);
2909 EXPORT_SYMBOL(pmu_resume);
2910 EXPORT_SYMBOL(pmu_unlock);
2911 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2912 EXPORT_SYMBOL(pmu_enable_irled);
2913 EXPORT_SYMBOL(pmu_battery_count);
2914 EXPORT_SYMBOL(pmu_batteries);
2915 EXPORT_SYMBOL(pmu_power_flags);
2916 #endif /* CONFIG_PM && CONFIG_PPC32 */
2917