Pileus Git - ~andy/linux/blob - drivers/macintosh/via-pmu.c

   1 /*
   2  * Device driver for the via-pmu on Apple Powermacs.
   3  *
   4  * The VIA (versatile interface adapter) interfaces to the PMU,
   5  * a 6805 microprocessor core whose primary function is to control
   6  * battery charging and system power on the PowerBook 3400 and 2400.
   7  * The PMU also controls the ADB (Apple Desktop Bus) which connects
   8  * to the keyboard and mouse, as well as the non-volatile RAM
   9  * and the RTC (real time clock) chip.
  10  *
  11  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
  12  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
  13  *
  14  * THIS DRIVER IS BECOMING A TOTAL MESS !
  15  *  - Cleanup atomically disabling reply to PMU events after
  16  *    a sleep or a freq. switch
  17  *  - Move sleep code out of here to pmac_pm, merge into new
  18  *    common PM infrastructure
  19  *  - Save/Restore PCI space properly
  20  *
  21  */
  22 #include <stdarg.h>
  23 #include <linux/types.h>
  24 #include <linux/errno.h>
  25 #include <linux/kernel.h>
  26 #include <linux/delay.h>
  27 #include <linux/sched.h>
  28 #include <linux/miscdevice.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/pci.h>
  31 #include <linux/slab.h>
  32 #include <linux/poll.h>
  33 #include <linux/adb.h>
  34 #include <linux/pmu.h>
  35 #include <linux/cuda.h>
  36 #include <linux/smp_lock.h>
  37 #include <linux/module.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/pm.h>
  40 #include <linux/proc_fs.h>
  41 #include <linux/init.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/device.h>
  44 #include <linux/sysdev.h>
  45 #include <linux/freezer.h>
  46 #include <linux/syscalls.h>
  47 #include <linux/suspend.h>
  48 #include <linux/cpu.h>
  49 #include <asm/prom.h>
  50 #include <asm/machdep.h>
  51 #include <asm/io.h>
  52 #include <asm/pgtable.h>
  53 #include <asm/system.h>
  54 #include <asm/sections.h>
  55 #include <asm/irq.h>
  56 #include <asm/pmac_feature.h>
  57 #include <asm/pmac_pfunc.h>
  58 #include <asm/pmac_low_i2c.h>
  59 #include <asm/uaccess.h>
  60 #include <asm/mmu_context.h>
  61 #include <asm/cputable.h>
  62 #include <asm/time.h>
  63 #include <asm/backlight.h>
  64
  65 #include "via-pmu-event.h"
  66
  67 /* Some compile options */
  68 #undef SUSPEND_USES_PMU
  69 #define DEBUG_SLEEP
  70 #undef HACKED_PCI_SAVE
  71
  72 /* Misc minor number allocated for /dev/pmu */
  73 #define PMU_MINOR               154
  74
  75 /* How many iterations between battery polls */
  76 #define BATTERY_POLLING_COUNT   2
  77
  78 static volatile unsigned char __iomem *via;
  79
  80 /* VIA registers - spaced 0x200 bytes apart */
  81 #define RS              0x200           /* skip between registers */
  82 #define B               0               /* B-side data */
  83 #define A               RS              /* A-side data */
  84 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  85 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  86 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  87 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  88 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  89 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  90 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  91 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  92 #define SR              (10*RS)         /* Shift register */
  93 #define ACR             (11*RS)         /* Auxiliary control register */
  94 #define PCR             (12*RS)         /* Peripheral control register */
  95 #define IFR             (13*RS)         /* Interrupt flag register */
  96 #define IER             (14*RS)         /* Interrupt enable register */
  97 #define ANH             (15*RS)         /* A-side data, no handshake */
  98
  99 /* Bits in B data register: both active low */
 100 #define TACK            0x08            /* Transfer acknowledge (input) */
 101 #define TREQ            0x10            /* Transfer request (output) */
 102
 103 /* Bits in ACR */
 104 #define SR_CTRL         0x1c            /* Shift register control bits */
 105 #define SR_EXT          0x0c            /* Shift on external clock */
 106 #define SR_OUT          0x10            /* Shift out if 1 */
 107
 108 /* Bits in IFR and IER */
 109 #define IER_SET         0x80            /* set bits in IER */
 110 #define IER_CLR         0               /* clear bits in IER */
 111 #define SR_INT          0x04            /* Shift register full/empty */
 112 #define CB2_INT         0x08
 113 #define CB1_INT         0x10            /* transition on CB1 input */
 114
 115 static volatile enum pmu_state {
 116         idle,
 117         sending,
 118         intack,
 119         reading,
 120         reading_intr,
 121         locked,
 122 } pmu_state;
 123
 124 static volatile enum int_data_state {
 125         int_data_empty,
 126         int_data_fill,
 127         int_data_ready,
 128         int_data_flush
 129 } int_data_state[2] = { int_data_empty, int_data_empty };
 130
 131 static struct adb_request *current_req;
 132 static struct adb_request *last_req;
 133 static struct adb_request *req_awaiting_reply;
 134 static unsigned char interrupt_data[2][32];
 135 static int interrupt_data_len[2];
 136 static int int_data_last;
 137 static unsigned char *reply_ptr;
 138 static int data_index;
 139 static int data_len;
 140 static volatile int adb_int_pending;
 141 static volatile int disable_poll;
 142 static struct device_node *vias;
 143 static int pmu_kind = PMU_UNKNOWN;
 144 static int pmu_fully_inited;
 145 static int pmu_has_adb;
 146 static struct device_node *gpio_node;
 147 static unsigned char __iomem *gpio_reg;
 148 static int gpio_irq = NO_IRQ;
 149 static int gpio_irq_enabled = -1;
 150 static volatile int pmu_suspended;
 151 static spinlock_t pmu_lock;
 152 static u8 pmu_intr_mask;
 153 static int pmu_version;
 154 static int drop_interrupts;
 155 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 156 static int option_lid_wakeup = 1;
 157 #endif /* CONFIG_PM && CONFIG_PPC32 */
 158 #if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT_LEGACY)
 159 static int sleep_in_progress;
 160 #endif
 161 static unsigned long async_req_locks;
 162 static unsigned int pmu_irq_stats[11];
 163
 164 static struct proc_dir_entry *proc_pmu_root;
 165 static struct proc_dir_entry *proc_pmu_info;
 166 static struct proc_dir_entry *proc_pmu_irqstats;
 167 static struct proc_dir_entry *proc_pmu_options;
 168 static int option_server_mode;
 169
 170 int pmu_battery_count;
 171 int pmu_cur_battery;
 172 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 173 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 174 static int query_batt_timer = BATTERY_POLLING_COUNT;
 175 static struct adb_request batt_req;
 176 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 177
 178 int __fake_sleep;
 179 int asleep;
 180 BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
 181
 182 #ifdef CONFIG_ADB
 183 static int adb_dev_map;
 184 static int pmu_adb_flags;
 185
 186 static int pmu_probe(void);
 187 static int pmu_init(void);
 188 static int pmu_send_request(struct adb_request *req, int sync);
 189 static int pmu_adb_autopoll(int devs);
 190 static int pmu_adb_reset_bus(void);
 191 #endif /* CONFIG_ADB */
 192
 193 static int init_pmu(void);
 194 static void pmu_start(void);
 195 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
 196 static irqreturn_t gpio1_interrupt(int irq, void *arg);
 197 static int proc_get_info(char *page, char **start, off_t off,
 198                           int count, int *eof, void *data);
 199 static int proc_get_irqstats(char *page, char **start, off_t off,
 200                           int count, int *eof, void *data);
 201 static void pmu_pass_intr(unsigned char *data, int len);
 202 static int proc_get_batt(char *page, char **start, off_t off,
 203                         int count, int *eof, void *data);
 204 static int proc_read_options(char *page, char **start, off_t off,
 205                         int count, int *eof, void *data);
 206 static int proc_write_options(struct file *file, const char __user *buffer,
 207                         unsigned long count, void *data);
 208
 209 #ifdef CONFIG_ADB
 210 struct adb_driver via_pmu_driver = {
 211         "PMU",
 212         pmu_probe,
 213         pmu_init,
 214         pmu_send_request,
 215         pmu_adb_autopoll,
 216         pmu_poll_adb,
 217         pmu_adb_reset_bus
 218 };
 219 #endif /* CONFIG_ADB */
 220
 221 extern void low_sleep_handler(void);
 222 extern void enable_kernel_altivec(void);
 223 extern void enable_kernel_fp(void);
 224
 225 #ifdef DEBUG_SLEEP
 226 int pmu_polled_request(struct adb_request *req);
 227 int pmu_wink(struct adb_request *req);
 228 #endif
 229
 230 /*
 231  * This table indicates for each PMU opcode:
 232  * - the number of data bytes to be sent with the command, or -1
 233  *   if a length byte should be sent,
 234  * - the number of response bytes which the PMU will return, or
 235  *   -1 if it will send a length byte.
 236  */
 237 static const s8 pmu_data_len[256][2] = {
 238 /*         0       1       2       3       4       5       6       7  */
 239 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 240 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 241 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 242 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 243 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 244 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 245 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 246 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 247 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 248 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 249 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 250 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 251 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 252 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 253 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 254 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 255 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 256 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 257 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 258 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 259 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 260 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 261 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 262 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 263 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 264 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 265 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 266 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 267 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 268 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 269 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 270 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 271 };
 272
 273 static char *pbook_type[] = {
 274         "Unknown PowerBook",
 275         "PowerBook 2400/3400/3500(G3)",
 276         "PowerBook G3 Series",
 277         "1999 PowerBook G3",
 278         "Core99"
 279 };
 280
 281 int __init find_via_pmu(void)
 282 {
 283         u64 taddr;
 284         const u32 *reg;
 285
 286         if (via != 0)
 287                 return 1;
 288         vias = of_find_node_by_name(NULL, "via-pmu");
 289         if (vias == NULL)
 290                 return 0;
 291
 292         reg = of_get_property(vias, "reg", NULL);
 293         if (reg == NULL) {
 294                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 295                 goto fail;
 296         }
 297         taddr = of_translate_address(vias, reg);
 298         if (taddr == OF_BAD_ADDR) {
 299                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 300                 goto fail;
 301         }
 302
 303         spin_lock_init(&pmu_lock);
 304
 305         pmu_has_adb = 1;
 306
 307         pmu_intr_mask = PMU_INT_PCEJECT |
 308                         PMU_INT_SNDBRT |
 309                         PMU_INT_ADB |
 310                         PMU_INT_TICK;
 311
 312         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 313             || device_is_compatible(vias->parent, "ohare")))
 314                 pmu_kind = PMU_OHARE_BASED;
 315         else if (device_is_compatible(vias->parent, "paddington"))
 316                 pmu_kind = PMU_PADDINGTON_BASED;
 317         else if (device_is_compatible(vias->parent, "heathrow"))
 318                 pmu_kind = PMU_HEATHROW_BASED;
 319         else if (device_is_compatible(vias->parent, "Keylargo")
 320                  || device_is_compatible(vias->parent, "K2-Keylargo")) {
 321                 struct device_node *gpiop;
 322                 struct device_node *adbp;
 323                 u64 gaddr = OF_BAD_ADDR;
 324
 325                 pmu_kind = PMU_KEYLARGO_BASED;
 326                 adbp = of_find_node_by_type(NULL, "adb");
 327                 pmu_has_adb = (adbp != NULL);
 328                 of_node_put(adbp);
 329                 pmu_intr_mask = PMU_INT_PCEJECT |
 330                                 PMU_INT_SNDBRT |
 331                                 PMU_INT_ADB |
 332                                 PMU_INT_TICK |
 333                                 PMU_INT_ENVIRONMENT;
 334
 335                 gpiop = of_find_node_by_name(NULL, "gpio");
 336                 if (gpiop) {
 337                         reg = of_get_property(gpiop, "reg", NULL);
 338                         if (reg)
 339                                 gaddr = of_translate_address(gpiop, reg);
 340                         if (gaddr != OF_BAD_ADDR)
 341                                 gpio_reg = ioremap(gaddr, 0x10);
 342                 }
 343                 if (gpio_reg == NULL) {
 344                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 345                         goto fail_gpio;
 346                 }
 347         } else
 348                 pmu_kind = PMU_UNKNOWN;
 349
 350         via = ioremap(taddr, 0x2000);
 351         if (via == NULL) {
 352                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 353                 goto fail;
 354         }
 355
 356         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 357         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 358
 359         pmu_state = idle;
 360
 361         if (!init_pmu()) {
 362                 via = NULL;
 363                 return 0;
 364         }
 365
 366         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 367                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 368
 369         sys_ctrler = SYS_CTRLER_PMU;
 370
 371         return 1;
 372  fail:
 373         of_node_put(vias);
 374         iounmap(gpio_reg);
 375         gpio_reg = NULL;
 376  fail_gpio:
 377         vias = NULL;
 378         return 0;
 379 }
 380
 381 #ifdef CONFIG_ADB
 382 static int pmu_probe(void)
 383 {
 384         return vias == NULL? -ENODEV: 0;
 385 }
 386
 387 static int __init pmu_init(void)
 388 {
 389         if (vias == NULL)
 390                 return -ENODEV;
 391         return 0;
 392 }
 393 #endif /* CONFIG_ADB */
 394
 395 /*
 396  * We can't wait until pmu_init gets called, that happens too late.
 397  * It happens after IDE and SCSI initialization, which can take a few
 398  * seconds, and by that time the PMU could have given up on us and
 399  * turned us off.
 400  * Thus this is called with arch_initcall rather than device_initcall.
 401  */
 402 static int __init via_pmu_start(void)
 403 {
 404         unsigned int irq;
 405
 406         if (vias == NULL)
 407                 return -ENODEV;
 408
 409         batt_req.complete = 1;
 410
 411         irq = irq_of_parse_and_map(vias, 0);
 412         if (irq == NO_IRQ) {
 413                 printk(KERN_ERR "via-pmu: can't map interruptn");
 414                 return -ENODEV;
 415         }
 416         if (request_irq(irq, via_pmu_interrupt, 0, "VIA-PMU", (void *)0)) {
 417                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 418                 return -ENODEV;
 419         }
 420
 421         if (pmu_kind == PMU_KEYLARGO_BASED) {
 422                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 423                 if (gpio_node == NULL)
 424                         gpio_node = of_find_node_by_name(NULL,
 425                                                          "pmu-interrupt");
 426                 if (gpio_node)
 427                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 428
 429                 if (gpio_irq != NO_IRQ) {
 430                         if (request_irq(gpio_irq, gpio1_interrupt, 0,
 431                                         "GPIO1 ADB", (void *)0))
 432                                 printk(KERN_ERR "pmu: can't get irq %d"
 433                                        " (GPIO1)\n", gpio_irq);
 434                         else
 435                                 gpio_irq_enabled = 1;
 436                 }
 437         }
 438
 439         /* Enable interrupts */
 440         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 441
 442         pmu_fully_inited = 1;
 443
 444         /* Make sure PMU settle down before continuing. This is _very_ important
 445          * since the IDE probe may shut interrupts down for quite a bit of time. If
 446          * a PMU communication is pending while this happens, the PMU may timeout
 447          * Not that on Core99 machines, the PMU keeps sending us environement
 448          * messages, we should find a way to either fix IDE or make it call
 449          * pmu_suspend() before masking interrupts. This can also happens while
 450          * scolling with some fbdevs.
 451          */
 452         do {
 453                 pmu_poll();
 454         } while (pmu_state != idle);
 455
 456         return 0;
 457 }
 458
 459 arch_initcall(via_pmu_start);
 460
 461 /*
 462  * This has to be done after pci_init, which is a subsys_initcall.
 463  */
 464 static int __init via_pmu_dev_init(void)
 465 {
 466         if (vias == NULL)
 467                 return -ENODEV;
 468
 469 #ifdef CONFIG_PMAC_BACKLIGHT
 470         /* Initialize backlight */
 471         pmu_backlight_init();
 472 #endif
 473
 474 #ifdef CONFIG_PPC32
 475         if (machine_is_compatible("AAPL,3400/2400") ||
 476                 machine_is_compatible("AAPL,3500")) {
 477                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 478                         NULL, PMAC_MB_INFO_MODEL, 0);
 479                 pmu_battery_count = 1;
 480                 if (mb == PMAC_TYPE_COMET)
 481                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 482                 else
 483                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 484         } else if (machine_is_compatible("AAPL,PowerBook1998") ||
 485                 machine_is_compatible("PowerBook1,1")) {
 486                 pmu_battery_count = 2;
 487                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 488                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 489         } else {
 490                 struct device_node* prim = find_devices("power-mgt");
 491                 const u32 *prim_info = NULL;
 492                 if (prim)
 493                         prim_info = of_get_property(prim, "prim-info", NULL);
 494                 if (prim_info) {
 495                         /* Other stuffs here yet unknown */
 496                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 497                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 498                         if (pmu_battery_count > 1)
 499                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 500                 }
 501         }
 502 #endif /* CONFIG_PPC32 */
 503
 504         /* Create /proc/pmu */
 505         proc_pmu_root = proc_mkdir("pmu", NULL);
 506         if (proc_pmu_root) {
 507                 long i;
 508
 509                 for (i=0; i<pmu_battery_count; i++) {
 510                         char title[16];
 511                         sprintf(title, "battery_%ld", i);
 512                         proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
 513                                                 proc_get_batt, (void *)i);
 514                 }
 515
 516                 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
 517                                         proc_get_info, NULL);
 518                 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
 519                                         proc_get_irqstats, NULL);
 520                 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
 521                 if (proc_pmu_options) {
 522                         proc_pmu_options->read_proc = proc_read_options;
 523                         proc_pmu_options->write_proc = proc_write_options;
 524                 }
 525         }
 526         return 0;
 527 }
 528
 529 device_initcall(via_pmu_dev_init);
 530
 531 static int
 532 init_pmu(void)
 533 {
 534         int timeout;
 535         struct adb_request req;
 536
 537         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 538         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 539
 540         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 541         timeout =  100000;
 542         while (!req.complete) {
 543                 if (--timeout < 0) {
 544                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 545                         return 0;
 546                 }
 547                 udelay(10);
 548                 pmu_poll();
 549         }
 550
 551         /* ack all pending interrupts */
 552         timeout = 100000;
 553         interrupt_data[0][0] = 1;
 554         while (interrupt_data[0][0] || pmu_state != idle) {
 555                 if (--timeout < 0) {
 556                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 557                         return 0;
 558                 }
 559                 if (pmu_state == idle)
 560                         adb_int_pending = 1;
 561                 via_pmu_interrupt(0, NULL);
 562                 udelay(10);
 563         }
 564
 565         /* Tell PMU we are ready.  */
 566         if (pmu_kind == PMU_KEYLARGO_BASED) {
 567                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 568                 while (!req.complete)
 569                         pmu_poll();
 570         }
 571
 572         /* Read PMU version */
 573         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 574         pmu_wait_complete(&req);
 575         if (req.reply_len > 0)
 576                 pmu_version = req.reply[0];
 577
 578         /* Read server mode setting */
 579         if (pmu_kind == PMU_KEYLARGO_BASED) {
 580                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 581                             PMU_PWR_GET_POWERUP_EVENTS);
 582                 pmu_wait_complete(&req);
 583                 if (req.reply_len == 2) {
 584                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 585                                 option_server_mode = 1;
 586                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 587                                option_server_mode ? "enabled" : "disabled");
 588                 }
 589         }
 590         return 1;
 591 }
 592
 593 int
 594 pmu_get_model(void)
 595 {
 596         return pmu_kind;
 597 }
 598
 599 static void pmu_set_server_mode(int server_mode)
 600 {
 601         struct adb_request req;
 602
 603         if (pmu_kind != PMU_KEYLARGO_BASED)
 604                 return;
 605
 606         option_server_mode = server_mode;
 607         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 608         pmu_wait_complete(&req);
 609         if (req.reply_len < 2)
 610                 return;
 611         if (server_mode)
 612                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 613                             PMU_PWR_SET_POWERUP_EVENTS,
 614                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 615         else
 616                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 617                             PMU_PWR_CLR_POWERUP_EVENTS,
 618                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 619         pmu_wait_complete(&req);
 620 }
 621
 622 /* This new version of the code for 2400/3400/3500 powerbooks
 623  * is inspired from the implementation in gkrellm-pmu
 624  */
 625 static void
 626 done_battery_state_ohare(struct adb_request* req)
 627 {
 628         /* format:
 629          *  [0]    :  flags
 630          *    0x01 :  AC indicator
 631          *    0x02 :  charging
 632          *    0x04 :  battery exist
 633          *    0x08 :
 634          *    0x10 :
 635          *    0x20 :  full charged
 636          *    0x40 :  pcharge reset
 637          *    0x80 :  battery exist
 638          *
 639          *  [1][2] :  battery voltage
 640          *  [3]    :  CPU temperature
 641          *  [4]    :  battery temperature
 642          *  [5]    :  current
 643          *  [6][7] :  pcharge
 644          *              --tkoba
 645          */
 646         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 647         long pcharge, charge, vb, vmax, lmax;
 648         long vmax_charging, vmax_charged;
 649         long amperage, voltage, time, max;
 650         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 651                         NULL, PMAC_MB_INFO_MODEL, 0);
 652
 653         if (req->reply[0] & 0x01)
 654                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 655         else
 656                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 657
 658         if (mb == PMAC_TYPE_COMET) {
 659                 vmax_charged = 189;
 660                 vmax_charging = 213;
 661                 lmax = 6500;
 662         } else {
 663                 vmax_charged = 330;
 664                 vmax_charging = 330;
 665                 lmax = 6500;
 666         }
 667         vmax = vmax_charged;
 668
 669         /* If battery installed */
 670         if (req->reply[0] & 0x04) {
 671                 bat_flags |= PMU_BATT_PRESENT;
 672                 if (req->reply[0] & 0x02)
 673                         bat_flags |= PMU_BATT_CHARGING;
 674                 vb = (req->reply[1] << 8) | req->reply[2];
 675                 voltage = (vb * 265 + 72665) / 10;
 676                 amperage = req->reply[5];
 677                 if ((req->reply[0] & 0x01) == 0) {
 678                         if (amperage > 200)
 679                                 vb += ((amperage - 200) * 15)/100;
 680                 } else if (req->reply[0] & 0x02) {
 681                         vb = (vb * 97) / 100;
 682                         vmax = vmax_charging;
 683                 }
 684                 charge = (100 * vb) / vmax;
 685                 if (req->reply[0] & 0x40) {
 686                         pcharge = (req->reply[6] << 8) + req->reply[7];
 687                         if (pcharge > lmax)
 688                                 pcharge = lmax;
 689                         pcharge *= 100;
 690                         pcharge = 100 - pcharge / lmax;
 691                         if (pcharge < charge)
 692                                 charge = pcharge;
 693                 }
 694                 if (amperage > 0)
 695                         time = (charge * 16440) / amperage;
 696                 else
 697                         time = 0;
 698                 max = 100;
 699                 amperage = -amperage;
 700         } else
 701                 charge = max = amperage = voltage = time = 0;
 702
 703         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 704         pmu_batteries[pmu_cur_battery].charge = charge;
 705         pmu_batteries[pmu_cur_battery].max_charge = max;
 706         pmu_batteries[pmu_cur_battery].amperage = amperage;
 707         pmu_batteries[pmu_cur_battery].voltage = voltage;
 708         pmu_batteries[pmu_cur_battery].time_remaining = time;
 709
 710         clear_bit(0, &async_req_locks);
 711 }
 712
 713 static void
 714 done_battery_state_smart(struct adb_request* req)
 715 {
 716         /* format:
 717          *  [0] : format of this structure (known: 3,4,5)
 718          *  [1] : flags
 719          *
 720          *  format 3 & 4:
 721          *
 722          *  [2] : charge
 723          *  [3] : max charge
 724          *  [4] : current
 725          *  [5] : voltage
 726          *
 727          *  format 5:
 728          *
 729          *  [2][3] : charge
 730          *  [4][5] : max charge
 731          *  [6][7] : current
 732          *  [8][9] : voltage
 733          */
 734
 735         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 736         int amperage;
 737         unsigned int capa, max, voltage;
 738
 739         if (req->reply[1] & 0x01)
 740                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 741         else
 742                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 743
 744
 745         capa = max = amperage = voltage = 0;
 746
 747         if (req->reply[1] & 0x04) {
 748                 bat_flags |= PMU_BATT_PRESENT;
 749                 switch(req->reply[0]) {
 750                         case 3:
 751                         case 4: capa = req->reply[2];
 752                                 max = req->reply[3];
 753                                 amperage = *((signed char *)&req->reply[4]);
 754                                 voltage = req->reply[5];
 755                                 break;
 756                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 757                                 max = (req->reply[4] << 8) | req->reply[5];
 758                                 amperage = *((signed short *)&req->reply[6]);
 759                                 voltage = (req->reply[8] << 8) | req->reply[9];
 760                                 break;
 761                         default:
 762                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 763                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 764                                 break;
 765                 }
 766         }
 767
 768         if ((req->reply[1] & 0x01) && (amperage > 0))
 769                 bat_flags |= PMU_BATT_CHARGING;
 770
 771         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 772         pmu_batteries[pmu_cur_battery].charge = capa;
 773         pmu_batteries[pmu_cur_battery].max_charge = max;
 774         pmu_batteries[pmu_cur_battery].amperage = amperage;
 775         pmu_batteries[pmu_cur_battery].voltage = voltage;
 776         if (amperage) {
 777                 if ((req->reply[1] & 0x01) && (amperage > 0))
 778                         pmu_batteries[pmu_cur_battery].time_remaining
 779                                 = ((max-capa) * 3600) / amperage;
 780                 else
 781                         pmu_batteries[pmu_cur_battery].time_remaining
 782                                 = (capa * 3600) / (-amperage);
 783         } else
 784                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 785
 786         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 787
 788         clear_bit(0, &async_req_locks);
 789 }
 790
 791 static void
 792 query_battery_state(void)
 793 {
 794         if (test_and_set_bit(0, &async_req_locks))
 795                 return;
 796         if (pmu_kind == PMU_OHARE_BASED)
 797                 pmu_request(&batt_req, done_battery_state_ohare,
 798                         1, PMU_BATTERY_STATE);
 799         else
 800                 pmu_request(&batt_req, done_battery_state_smart,
 801                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 802 }
 803
 804 static int
 805 proc_get_info(char *page, char **start, off_t off,
 806                 int count, int *eof, void *data)
 807 {
 808         char* p = page;
 809
 810         p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 811         p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
 812         p += sprintf(p, "AC Power               : %d\n",
 813                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 814         p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);
 815
 816         return p - page;
 817 }
 818
 819 static int
 820 proc_get_irqstats(char *page, char **start, off_t off,
 821                   int count, int *eof, void *data)
 822 {
 823         int i;
 824         char* p = page;
 825         static const char *irq_names[] = {
 826                 "Total CB1 triggered events",
 827                 "Total GPIO1 triggered events",
 828                 "PC-Card eject button",
 829                 "Sound/Brightness button",
 830                 "ADB message",
 831                 "Battery state change",
 832                 "Environment interrupt",
 833                 "Tick timer",
 834                 "Ghost interrupt (zero len)",
 835                 "Empty interrupt (empty mask)",
 836                 "Max irqs in a row"
 837         };
 838
 839         for (i=0; i<11; i++) {
 840                 p += sprintf(p, " %2u: %10u (%s)\n",
 841                              i, pmu_irq_stats[i], irq_names[i]);
 842         }
 843         return p - page;
 844 }
 845
 846 static int
 847 proc_get_batt(char *page, char **start, off_t off,
 848                 int count, int *eof, void *data)
 849 {
 850         long batnum = (long)data;
 851         char *p = page;
 852
 853         p += sprintf(p, "\n");
 854         p += sprintf(p, "flags      : %08x\n",
 855                 pmu_batteries[batnum].flags);
 856         p += sprintf(p, "charge     : %d\n",
 857                 pmu_batteries[batnum].charge);
 858         p += sprintf(p, "max_charge : %d\n",
 859                 pmu_batteries[batnum].max_charge);
 860         p += sprintf(p, "current    : %d\n",
 861                 pmu_batteries[batnum].amperage);
 862         p += sprintf(p, "voltage    : %d\n",
 863                 pmu_batteries[batnum].voltage);
 864         p += sprintf(p, "time rem.  : %d\n",
 865                 pmu_batteries[batnum].time_remaining);
 866
 867         return p - page;
 868 }
 869
 870 static int
 871 proc_read_options(char *page, char **start, off_t off,
 872                         int count, int *eof, void *data)
 873 {
 874         char *p = page;
 875
 876 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 877         if (pmu_kind == PMU_KEYLARGO_BASED &&
 878             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 879                 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
 880 #endif
 881         if (pmu_kind == PMU_KEYLARGO_BASED)
 882                 p += sprintf(p, "server_mode=%d\n", option_server_mode);
 883
 884         return p - page;
 885 }
 886
 887 static int
 888 proc_write_options(struct file *file, const char __user *buffer,
 889                         unsigned long count, void *data)
 890 {
 891         char tmp[33];
 892         char *label, *val;
 893         unsigned long fcount = count;
 894
 895         if (!count)
 896                 return -EINVAL;
 897         if (count > 32)
 898                 count = 32;
 899         if (copy_from_user(tmp, buffer, count))
 900                 return -EFAULT;
 901         tmp[count] = 0;
 902
 903         label = tmp;
 904         while(*label == ' ')
 905                 label++;
 906         val = label;
 907         while(*val && (*val != '=')) {
 908                 if (*val == ' ')
 909                         *val = 0;
 910                 val++;
 911         }
 912         if ((*val) == 0)
 913                 return -EINVAL;
 914         *(val++) = 0;
 915         while(*val == ' ')
 916                 val++;
 917 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 918         if (pmu_kind == PMU_KEYLARGO_BASED &&
 919             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 920                 if (!strcmp(label, "lid_wakeup"))
 921                         option_lid_wakeup = ((*val) == '1');
 922 #endif
 923         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 924                 int new_value;
 925                 new_value = ((*val) == '1');
 926                 if (new_value != option_server_mode)
 927                         pmu_set_server_mode(new_value);
 928         }
 929         return fcount;
 930 }
 931
 932 #ifdef CONFIG_ADB
 933 /* Send an ADB command */
 934 static int
 935 pmu_send_request(struct adb_request *req, int sync)
 936 {
 937         int i, ret;
 938
 939         if ((vias == NULL) || (!pmu_fully_inited)) {
 940                 req->complete = 1;
 941                 return -ENXIO;
 942         }
 943
 944         ret = -EINVAL;
 945
 946         switch (req->data[0]) {
 947         case PMU_PACKET:
 948                 for (i = 0; i < req->nbytes - 1; ++i)
 949                         req->data[i] = req->data[i+1];
 950                 --req->nbytes;
 951                 if (pmu_data_len[req->data[0]][1] != 0) {
 952                         req->reply[0] = ADB_RET_OK;
 953                         req->reply_len = 1;
 954                 } else
 955                         req->reply_len = 0;
 956                 ret = pmu_queue_request(req);
 957                 break;
 958         case CUDA_PACKET:
 959                 switch (req->data[1]) {
 960                 case CUDA_GET_TIME:
 961                         if (req->nbytes != 2)
 962                                 break;
 963                         req->data[0] = PMU_READ_RTC;
 964                         req->nbytes = 1;
 965                         req->reply_len = 3;
 966                         req->reply[0] = CUDA_PACKET;
 967                         req->reply[1] = 0;
 968                         req->reply[2] = CUDA_GET_TIME;
 969                         ret = pmu_queue_request(req);
 970                         break;
 971                 case CUDA_SET_TIME:
 972                         if (req->nbytes != 6)
 973                                 break;
 974                         req->data[0] = PMU_SET_RTC;
 975                         req->nbytes = 5;
 976                         for (i = 1; i <= 4; ++i)
 977                                 req->data[i] = req->data[i+1];
 978                         req->reply_len = 3;
 979                         req->reply[0] = CUDA_PACKET;
 980                         req->reply[1] = 0;
 981                         req->reply[2] = CUDA_SET_TIME;
 982                         ret = pmu_queue_request(req);
 983                         break;
 984                 }
 985                 break;
 986         case ADB_PACKET:
 987                 if (!pmu_has_adb)
 988                         return -ENXIO;
 989                 for (i = req->nbytes - 1; i > 1; --i)
 990                         req->data[i+2] = req->data[i];
 991                 req->data[3] = req->nbytes - 2;
 992                 req->data[2] = pmu_adb_flags;
 993                 /*req->data[1] = req->data[1];*/
 994                 req->data[0] = PMU_ADB_CMD;
 995                 req->nbytes += 2;
 996                 req->reply_expected = 1;
 997                 req->reply_len = 0;
 998                 ret = pmu_queue_request(req);
 999                 break;
1000         }
1001         if (ret) {
1002                 req->complete = 1;
1003                 return ret;
1004         }
1005
1006         if (sync)
1007                 while (!req->complete)
1008                         pmu_poll();
1009
1010         return 0;
1011 }
1012
1013 /* Enable/disable autopolling */
1014 static int
1015 pmu_adb_autopoll(int devs)
1016 {
1017         struct adb_request req;
1018
1019         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1020                 return -ENXIO;
1021
1022         if (devs) {
1023                 adb_dev_map = devs;
1024                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1025                             adb_dev_map >> 8, adb_dev_map);
1026                 pmu_adb_flags = 2;
1027         } else {
1028                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1029                 pmu_adb_flags = 0;
1030         }
1031         while (!req.complete)
1032                 pmu_poll();
1033         return 0;
1034 }
1035
1036 /* Reset the ADB bus */
1037 static int
1038 pmu_adb_reset_bus(void)
1039 {
1040         struct adb_request req;
1041         int save_autopoll = adb_dev_map;
1042
1043         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1044                 return -ENXIO;
1045
1046         /* anyone got a better idea?? */
1047         pmu_adb_autopoll(0);
1048
1049         req.nbytes = 5;
1050         req.done = NULL;
1051         req.data[0] = PMU_ADB_CMD;
1052         req.data[1] = 0;
1053         req.data[2] = ADB_BUSRESET;
1054         req.data[3] = 0;
1055         req.data[4] = 0;
1056         req.reply_len = 0;
1057         req.reply_expected = 1;
1058         if (pmu_queue_request(&req) != 0) {
1059                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1060                 return -EIO;
1061         }
1062         pmu_wait_complete(&req);
1063
1064         if (save_autopoll != 0)
1065                 pmu_adb_autopoll(save_autopoll);
1066
1067         return 0;
1068 }
1069 #endif /* CONFIG_ADB */
1070
1071 /* Construct and send a pmu request */
1072 int
1073 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1074             int nbytes, ...)
1075 {
1076         va_list list;
1077         int i;
1078
1079         if (vias == NULL)
1080                 return -ENXIO;
1081
1082         if (nbytes < 0 || nbytes > 32) {
1083                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1084                 req->complete = 1;
1085                 return -EINVAL;
1086         }
1087         req->nbytes = nbytes;
1088         req->done = done;
1089         va_start(list, nbytes);
1090         for (i = 0; i < nbytes; ++i)
1091                 req->data[i] = va_arg(list, int);
1092         va_end(list);
1093         req->reply_len = 0;
1094         req->reply_expected = 0;
1095         return pmu_queue_request(req);
1096 }
1097
1098 int
1099 pmu_queue_request(struct adb_request *req)
1100 {
1101         unsigned long flags;
1102         int nsend;
1103
1104         if (via == NULL) {
1105                 req->complete = 1;
1106                 return -ENXIO;
1107         }
1108         if (req->nbytes <= 0) {
1109                 req->complete = 1;
1110                 return 0;
1111         }
1112         nsend = pmu_data_len[req->data[0]][0];
1113         if (nsend >= 0 && req->nbytes != nsend + 1) {
1114                 req->complete = 1;
1115                 return -EINVAL;
1116         }
1117
1118         req->next = NULL;
1119         req->sent = 0;
1120         req->complete = 0;
1121
1122         spin_lock_irqsave(&pmu_lock, flags);
1123         if (current_req != 0) {
1124                 last_req->next = req;
1125                 last_req = req;
1126         } else {
1127                 current_req = req;
1128                 last_req = req;
1129                 if (pmu_state == idle)
1130                         pmu_start();
1131         }
1132         spin_unlock_irqrestore(&pmu_lock, flags);
1133
1134         return 0;
1135 }
1136
1137 static inline void
1138 wait_for_ack(void)
1139 {
1140         /* Sightly increased the delay, I had one occurrence of the message
1141          * reported
1142          */
1143         int timeout = 4000;
1144         while ((in_8(&via[B]) & TACK) == 0) {
1145                 if (--timeout < 0) {
1146                         printk(KERN_ERR "PMU not responding (!ack)\n");
1147                         return;
1148                 }
1149                 udelay(10);
1150         }
1151 }
1152
1153 /* New PMU seems to be very sensitive to those timings, so we make sure
1154  * PCI is flushed immediately */
1155 static inline void
1156 send_byte(int x)
1157 {
1158         volatile unsigned char __iomem *v = via;
1159
1160         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1161         out_8(&v[SR], x);
1162         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1163         (void)in_8(&v[B]);
1164 }
1165
1166 static inline void
1167 recv_byte(void)
1168 {
1169         volatile unsigned char __iomem *v = via;
1170
1171         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1172         in_8(&v[SR]);           /* resets SR */
1173         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1174         (void)in_8(&v[B]);
1175 }
1176
1177 static inline void
1178 pmu_done(struct adb_request *req)
1179 {
1180         void (*done)(struct adb_request *) = req->done;
1181         mb();
1182         req->complete = 1;
1183         /* Here, we assume that if the request has a done member, the
1184          * struct request will survive to setting req->complete to 1
1185          */
1186         if (done)
1187                 (*done)(req);
1188 }
1189
1190 static void
1191 pmu_start(void)
1192 {
1193         struct adb_request *req;
1194
1195         /* assert pmu_state == idle */
1196         /* get the packet to send */
1197         req = current_req;
1198         if (req == 0 || pmu_state != idle
1199             || (/*req->reply_expected && */req_awaiting_reply))
1200                 return;
1201
1202         pmu_state = sending;
1203         data_index = 1;
1204         data_len = pmu_data_len[req->data[0]][0];
1205
1206         /* Sounds safer to make sure ACK is high before writing. This helped
1207          * kill a problem with ADB and some iBooks
1208          */
1209         wait_for_ack();
1210         /* set the shift register to shift out and send a byte */
1211         send_byte(req->data[0]);
1212 }
1213
1214 void
1215 pmu_poll(void)
1216 {
1217         if (!via)
1218                 return;
1219         if (disable_poll)
1220                 return;
1221         via_pmu_interrupt(0, NULL);
1222 }
1223
1224 void
1225 pmu_poll_adb(void)
1226 {
1227         if (!via)
1228                 return;
1229         if (disable_poll)
1230                 return;
1231         /* Kicks ADB read when PMU is suspended */
1232         adb_int_pending = 1;
1233         do {
1234                 via_pmu_interrupt(0, NULL);
1235         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1236                 || req_awaiting_reply));
1237 }
1238
1239 void
1240 pmu_wait_complete(struct adb_request *req)
1241 {
1242         if (!via)
1243                 return;
1244         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1245                 via_pmu_interrupt(0, NULL);
1246 }
1247
1248 /* This function loops until the PMU is idle and prevents it from
1249  * anwsering to ADB interrupts. pmu_request can still be called.
1250  * This is done to avoid spurrious shutdowns when we know we'll have
1251  * interrupts switched off for a long time
1252  */
1253 void
1254 pmu_suspend(void)
1255 {
1256         unsigned long flags;
1257 #ifdef SUSPEND_USES_PMU
1258         struct adb_request *req;
1259 #endif
1260         if (!via)
1261                 return;
1262
1263         spin_lock_irqsave(&pmu_lock, flags);
1264         pmu_suspended++;
1265         if (pmu_suspended > 1) {
1266                 spin_unlock_irqrestore(&pmu_lock, flags);
1267                 return;
1268         }
1269
1270         do {
1271                 spin_unlock_irqrestore(&pmu_lock, flags);
1272                 if (req_awaiting_reply)
1273                         adb_int_pending = 1;
1274                 via_pmu_interrupt(0, NULL);
1275                 spin_lock_irqsave(&pmu_lock, flags);
1276                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1277 #ifdef SUSPEND_USES_PMU
1278                         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1279                         spin_unlock_irqrestore(&pmu_lock, flags);
1280                         while(!req.complete)
1281                                 pmu_poll();
1282 #else /* SUSPEND_USES_PMU */
1283                         if (gpio_irq >= 0)
1284                                 disable_irq_nosync(gpio_irq);
1285                         out_8(&via[IER], CB1_INT | IER_CLR);
1286                         spin_unlock_irqrestore(&pmu_lock, flags);
1287 #endif /* SUSPEND_USES_PMU */
1288                         break;
1289                 }
1290         } while (1);
1291 }
1292
1293 void
1294 pmu_resume(void)
1295 {
1296         unsigned long flags;
1297
1298         if (!via || (pmu_suspended < 1))
1299                 return;
1300
1301         spin_lock_irqsave(&pmu_lock, flags);
1302         pmu_suspended--;
1303         if (pmu_suspended > 0) {
1304                 spin_unlock_irqrestore(&pmu_lock, flags);
1305                 return;
1306         }
1307         adb_int_pending = 1;
1308 #ifdef SUSPEND_USES_PMU
1309         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1310         spin_unlock_irqrestore(&pmu_lock, flags);
1311         while(!req.complete)
1312                 pmu_poll();
1313 #else /* SUSPEND_USES_PMU */
1314         if (gpio_irq >= 0)
1315                 enable_irq(gpio_irq);
1316         out_8(&via[IER], CB1_INT | IER_SET);
1317         spin_unlock_irqrestore(&pmu_lock, flags);
1318         pmu_poll();
1319 #endif /* SUSPEND_USES_PMU */
1320 }
1321
1322 /* Interrupt data could be the result data from an ADB cmd */
1323 static void
1324 pmu_handle_data(unsigned char *data, int len)
1325 {
1326         unsigned char ints, pirq;
1327         int i = 0;
1328
1329         asleep = 0;
1330         if (drop_interrupts || len < 1) {
1331                 adb_int_pending = 0;
1332                 pmu_irq_stats[8]++;
1333                 return;
1334         }
1335
1336         /* Get PMU interrupt mask */
1337         ints = data[0];
1338
1339         /* Record zero interrupts for stats */
1340         if (ints == 0)
1341                 pmu_irq_stats[9]++;
1342
1343         /* Hack to deal with ADB autopoll flag */
1344         if (ints & PMU_INT_ADB)
1345                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1346
1347 next:
1348
1349         if (ints == 0) {
1350                 if (i > pmu_irq_stats[10])
1351                         pmu_irq_stats[10] = i;
1352                 return;
1353         }
1354
1355         for (pirq = 0; pirq < 8; pirq++)
1356                 if (ints & (1 << pirq))
1357                         break;
1358         pmu_irq_stats[pirq]++;
1359         i++;
1360         ints &= ~(1 << pirq);
1361
1362         /* Note: for some reason, we get an interrupt with len=1,
1363          * data[0]==0 after each normal ADB interrupt, at least
1364          * on the Pismo. Still investigating...  --BenH
1365          */
1366         if ((1 << pirq) & PMU_INT_ADB) {
1367                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1368                         struct adb_request *req = req_awaiting_reply;
1369                         if (req == 0) {
1370                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1371                                 return;
1372                         }
1373                         req_awaiting_reply = NULL;
1374                         if (len <= 2)
1375                                 req->reply_len = 0;
1376                         else {
1377                                 memcpy(req->reply, data + 1, len - 1);
1378                                 req->reply_len = len - 1;
1379                         }
1380                         pmu_done(req);
1381                 } else {
1382                         if (len == 4 && data[1] == 0x2c) {
1383                                 extern int xmon_wants_key, xmon_adb_keycode;
1384                                 if (xmon_wants_key) {
1385                                         xmon_adb_keycode = data[2];
1386                                         return;
1387                                 }
1388                         }
1389 #ifdef CONFIG_ADB
1390                         /*
1391                          * XXX On the [23]400 the PMU gives us an up
1392                          * event for keycodes 0x74 or 0x75 when the PC
1393                          * card eject buttons are released, so we
1394                          * ignore those events.
1395                          */
1396                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1397                               && data[1] == 0x2c && data[3] == 0xff
1398                               && (data[2] & ~1) == 0xf4))
1399                                 adb_input(data+1, len-1, 1);
1400 #endif /* CONFIG_ADB */
1401                 }
1402         }
1403         /* Sound/brightness button pressed */
1404         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1405 #ifdef CONFIG_PMAC_BACKLIGHT
1406                 if (len == 3)
1407                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1408 #endif
1409         }
1410         /* Tick interrupt */
1411         else if ((1 << pirq) & PMU_INT_TICK) {
1412                 /* Environement or tick interrupt, query batteries */
1413                 if (pmu_battery_count) {
1414                         if ((--query_batt_timer) == 0) {
1415                                 query_battery_state();
1416                                 query_batt_timer = BATTERY_POLLING_COUNT;
1417                         }
1418                 }
1419         }
1420         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1421                 if (pmu_battery_count)
1422                         query_battery_state();
1423                 pmu_pass_intr(data, len);
1424                 /* len == 6 is probably a bad check. But how do I
1425                  * know what PMU versions send what events here? */
1426                 if (len == 6) {
1427                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1428                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1429                 }
1430         } else {
1431                pmu_pass_intr(data, len);
1432         }
1433         goto next;
1434 }
1435
1436 static struct adb_request*
1437 pmu_sr_intr(void)
1438 {
1439         struct adb_request *req;
1440         int bite = 0;
1441
1442         if (via[B] & TREQ) {
1443                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1444                 out_8(&via[IFR], SR_INT);
1445                 return NULL;
1446         }
1447         /* The ack may not yet be low when we get the interrupt */
1448         while ((in_8(&via[B]) & TACK) != 0)
1449                         ;
1450
1451         /* if reading grab the byte, and reset the interrupt */
1452         if (pmu_state == reading || pmu_state == reading_intr)
1453                 bite = in_8(&via[SR]);
1454
1455         /* reset TREQ and wait for TACK to go high */
1456         out_8(&via[B], in_8(&via[B]) | TREQ);
1457         wait_for_ack();
1458
1459         switch (pmu_state) {
1460         case sending:
1461                 req = current_req;
1462                 if (data_len < 0) {
1463                         data_len = req->nbytes - 1;
1464                         send_byte(data_len);
1465                         break;
1466                 }
1467                 if (data_index <= data_len) {
1468                         send_byte(req->data[data_index++]);
1469                         break;
1470                 }
1471                 req->sent = 1;
1472                 data_len = pmu_data_len[req->data[0]][1];
1473                 if (data_len == 0) {
1474                         pmu_state = idle;
1475                         current_req = req->next;
1476                         if (req->reply_expected)
1477                                 req_awaiting_reply = req;
1478                         else
1479                                 return req;
1480                 } else {
1481                         pmu_state = reading;
1482                         data_index = 0;
1483                         reply_ptr = req->reply + req->reply_len;
1484                         recv_byte();
1485                 }
1486                 break;
1487
1488         case intack:
1489                 data_index = 0;
1490                 data_len = -1;
1491                 pmu_state = reading_intr;
1492                 reply_ptr = interrupt_data[int_data_last];
1493                 recv_byte();
1494                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1495                         enable_irq(gpio_irq);
1496                         gpio_irq_enabled = 1;
1497                 }
1498                 break;
1499
1500         case reading:
1501         case reading_intr:
1502                 if (data_len == -1) {
1503                         data_len = bite;
1504                         if (bite > 32)
1505                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1506                 } else if (data_index < 32) {
1507                         reply_ptr[data_index++] = bite;
1508                 }
1509                 if (data_index < data_len) {
1510                         recv_byte();
1511                         break;
1512                 }
1513
1514                 if (pmu_state == reading_intr) {
1515                         pmu_state = idle;
1516                         int_data_state[int_data_last] = int_data_ready;
1517                         interrupt_data_len[int_data_last] = data_len;
1518                 } else {
1519                         req = current_req;
1520                         /*
1521                          * For PMU sleep and freq change requests, we lock the
1522                          * PMU until it's explicitely unlocked. This avoids any
1523                          * spurrious event polling getting in
1524                          */
1525                         current_req = req->next;
1526                         req->reply_len += data_index;
1527                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1528                                 pmu_state = locked;
1529                         else
1530                                 pmu_state = idle;
1531                         return req;
1532                 }
1533                 break;
1534
1535         default:
1536                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1537                        pmu_state);
1538         }
1539         return NULL;
1540 }
1541
1542 static irqreturn_t
1543 via_pmu_interrupt(int irq, void *arg)
1544 {
1545         unsigned long flags;
1546         int intr;
1547         int nloop = 0;
1548         int int_data = -1;
1549         struct adb_request *req = NULL;
1550         int handled = 0;
1551
1552         /* This is a bit brutal, we can probably do better */
1553         spin_lock_irqsave(&pmu_lock, flags);
1554         ++disable_poll;
1555
1556         for (;;) {
1557                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1558                 if (intr == 0)
1559                         break;
1560                 handled = 1;
1561                 if (++nloop > 1000) {
1562                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1563                                "intr=%x, ier=%x pmu_state=%d\n",
1564                                intr, in_8(&via[IER]), pmu_state);
1565                         break;
1566                 }
1567                 out_8(&via[IFR], intr);
1568                 if (intr & CB1_INT) {
1569                         adb_int_pending = 1;
1570                         pmu_irq_stats[0]++;
1571                 }
1572                 if (intr & SR_INT) {
1573                         req = pmu_sr_intr();
1574                         if (req)
1575                                 break;
1576                 }
1577         }
1578
1579 recheck:
1580         if (pmu_state == idle) {
1581                 if (adb_int_pending) {
1582                         if (int_data_state[0] == int_data_empty)
1583                                 int_data_last = 0;
1584                         else if (int_data_state[1] == int_data_empty)
1585                                 int_data_last = 1;
1586                         else
1587                                 goto no_free_slot;
1588                         pmu_state = intack;
1589                         int_data_state[int_data_last] = int_data_fill;
1590                         /* Sounds safer to make sure ACK is high before writing.
1591                          * This helped kill a problem with ADB and some iBooks
1592                          */
1593                         wait_for_ack();
1594                         send_byte(PMU_INT_ACK);
1595                         adb_int_pending = 0;
1596                 } else if (current_req)
1597                         pmu_start();
1598         }
1599 no_free_slot:
1600         /* Mark the oldest buffer for flushing */
1601         if (int_data_state[!int_data_last] == int_data_ready) {
1602                 int_data_state[!int_data_last] = int_data_flush;
1603                 int_data = !int_data_last;
1604         } else if (int_data_state[int_data_last] == int_data_ready) {
1605                 int_data_state[int_data_last] = int_data_flush;
1606                 int_data = int_data_last;
1607         }
1608         --disable_poll;
1609         spin_unlock_irqrestore(&pmu_lock, flags);
1610
1611         /* Deal with completed PMU requests outside of the lock */
1612         if (req) {
1613                 pmu_done(req);
1614                 req = NULL;
1615         }
1616
1617         /* Deal with interrupt datas outside of the lock */
1618         if (int_data >= 0) {
1619                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1620                 spin_lock_irqsave(&pmu_lock, flags);
1621                 ++disable_poll;
1622                 int_data_state[int_data] = int_data_empty;
1623                 int_data = -1;
1624                 goto recheck;
1625         }
1626
1627         return IRQ_RETVAL(handled);
1628 }
1629
1630 void
1631 pmu_unlock(void)
1632 {
1633         unsigned long flags;
1634
1635         spin_lock_irqsave(&pmu_lock, flags);
1636         if (pmu_state == locked)
1637                 pmu_state = idle;
1638         adb_int_pending = 1;
1639         spin_unlock_irqrestore(&pmu_lock, flags);
1640 }
1641
1642
1643 static irqreturn_t
1644 gpio1_interrupt(int irq, void *arg)
1645 {
1646         unsigned long flags;
1647
1648         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1649                 spin_lock_irqsave(&pmu_lock, flags);
1650                 if (gpio_irq_enabled > 0) {
1651                         disable_irq_nosync(gpio_irq);
1652                         gpio_irq_enabled = 0;
1653                 }
1654                 pmu_irq_stats[1]++;
1655                 adb_int_pending = 1;
1656                 spin_unlock_irqrestore(&pmu_lock, flags);
1657                 via_pmu_interrupt(0, NULL);
1658                 return IRQ_HANDLED;
1659         }
1660         return IRQ_NONE;
1661 }
1662
1663 void
1664 pmu_enable_irled(int on)
1665 {
1666         struct adb_request req;
1667
1668         if (vias == NULL)
1669                 return ;
1670         if (pmu_kind == PMU_KEYLARGO_BASED)
1671                 return ;
1672
1673         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1674             (on ? PMU_POW_ON : PMU_POW_OFF));
1675         pmu_wait_complete(&req);
1676 }
1677
1678 void
1679 pmu_restart(void)
1680 {
1681         struct adb_request req;
1682
1683         if (via == NULL)
1684                 return;
1685
1686         local_irq_disable();
1687
1688         drop_interrupts = 1;
1689
1690         if (pmu_kind != PMU_KEYLARGO_BASED) {
1691                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1692                                                 PMU_INT_TICK );
1693                 while(!req.complete)
1694                         pmu_poll();
1695         }
1696
1697         pmu_request(&req, NULL, 1, PMU_RESET);
1698         pmu_wait_complete(&req);
1699         for (;;)
1700                 ;
1701 }
1702
1703 void
1704 pmu_shutdown(void)
1705 {
1706         struct adb_request req;
1707
1708         if (via == NULL)
1709                 return;
1710
1711         local_irq_disable();
1712
1713         drop_interrupts = 1;
1714
1715         if (pmu_kind != PMU_KEYLARGO_BASED) {
1716                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1717                                                 PMU_INT_TICK );
1718                 pmu_wait_complete(&req);
1719         } else {
1720                 /* Disable server mode on shutdown or we'll just
1721                  * wake up again
1722                  */
1723                 pmu_set_server_mode(0);
1724         }
1725
1726         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1727                     'M', 'A', 'T', 'T');
1728         pmu_wait_complete(&req);
1729         for (;;)
1730                 ;
1731 }
1732
1733 int
1734 pmu_present(void)
1735 {
1736         return via != 0;
1737 }
1738
1739 #ifdef CONFIG_PM
1740
1741 static LIST_HEAD(sleep_notifiers);
1742
1743 int
1744 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
1745 {
1746         struct list_head *list;
1747         struct pmu_sleep_notifier *notifier;
1748
1749         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1750              list = list->next) {
1751                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1752                 if (n->priority > notifier->priority)
1753                         break;
1754         }
1755         __list_add(&n->list, list->prev, list);
1756         return 0;
1757 }
1758 EXPORT_SYMBOL(pmu_register_sleep_notifier);
1759
1760 int
1761 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
1762 {
1763         if (n->list.next == 0)
1764                 return -ENOENT;
1765         list_del(&n->list);
1766         n->list.next = NULL;
1767         return 0;
1768 }
1769 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
1770 #endif /* CONFIG_PM */
1771
1772 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1773
1774 /* Sleep is broadcast last-to-first */
1775 static void broadcast_sleep(int when)
1776 {
1777         struct list_head *list;
1778         struct pmu_sleep_notifier *notifier;
1779
1780         for (list = sleep_notifiers.prev; list != &sleep_notifiers;
1781              list = list->prev) {
1782                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1783                 notifier->notifier_call(notifier, when);
1784         }
1785 }
1786
1787 /* Wake is broadcast first-to-last */
1788 static void broadcast_wake(void)
1789 {
1790         struct list_head *list;
1791         struct pmu_sleep_notifier *notifier;
1792
1793         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1794              list = list->next) {
1795                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1796                 notifier->notifier_call(notifier, PBOOK_WAKE);
1797         }
1798 }
1799
1800 /*
1801  * This struct is used to store config register values for
1802  * PCI devices which may get powered off when we sleep.
1803  */
1804 static struct pci_save {
1805 #ifndef HACKED_PCI_SAVE
1806         u16     command;
1807         u16     cache_lat;
1808         u16     intr;
1809         u32     rom_address;
1810 #else
1811         u32     config[16];
1812 #endif
1813 } *pbook_pci_saves;
1814 static int pbook_npci_saves;
1815
1816 static void
1817 pbook_alloc_pci_save(void)
1818 {
1819         int npci;
1820         struct pci_dev *pd = NULL;
1821
1822         npci = 0;
1823         while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1824                 ++npci;
1825         }
1826         if (npci == 0)
1827                 return;
1828         pbook_pci_saves = (struct pci_save *)
1829                 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
1830         pbook_npci_saves = npci;
1831 }
1832
1833 static void
1834 pbook_free_pci_save(void)
1835 {
1836         if (pbook_pci_saves == NULL)
1837                 return;
1838         kfree(pbook_pci_saves);
1839         pbook_pci_saves = NULL;
1840         pbook_npci_saves = 0;
1841 }
1842
1843 static void
1844 pbook_pci_save(void)
1845 {
1846         struct pci_save *ps = pbook_pci_saves;
1847         struct pci_dev *pd = NULL;
1848         int npci = pbook_npci_saves;
1849
1850         if (ps == NULL)
1851                 return;
1852
1853         while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1854                 if (npci-- == 0) {
1855                         pci_dev_put(pd);
1856                         return;
1857                 }
1858 #ifndef HACKED_PCI_SAVE
1859                 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
1860                 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
1861                 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
1862                 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
1863 #else
1864                 int i;
1865                 for (i=1;i<16;i++)
1866                         pci_read_config_dword(pd, i<<4, &ps->config[i]);
1867 #endif
1868                 ++ps;
1869         }
1870 }
1871
1872 /* For this to work, we must take care of a few things: If gmac was enabled
1873  * during boot, it will be in the pci dev list. If it's disabled at this point
1874  * (and it will probably be), then you can't access it's config space.
1875  */
1876 static void
1877 pbook_pci_restore(void)
1878 {
1879         u16 cmd;
1880         struct pci_save *ps = pbook_pci_saves - 1;
1881         struct pci_dev *pd = NULL;
1882         int npci = pbook_npci_saves;
1883         int j;
1884
1885         while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1886 #ifdef HACKED_PCI_SAVE
1887                 int i;
1888                 if (npci-- == 0) {
1889                         pci_dev_put(pd);
1890                         return;
1891                 }
1892                 ps++;
1893                 for (i=2;i<16;i++)
1894                         pci_write_config_dword(pd, i<<4, ps->config[i]);
1895                 pci_write_config_dword(pd, 4, ps->config[1]);
1896 #else
1897                 if (npci-- == 0)
1898                         return;
1899                 ps++;
1900                 if (ps->command == 0)
1901                         continue;
1902                 pci_read_config_word(pd, PCI_COMMAND, &cmd);
1903                 if ((ps->command & ~cmd) == 0)
1904                         continue;
1905                 switch (pd->hdr_type) {
1906                 case PCI_HEADER_TYPE_NORMAL:
1907                         for (j = 0; j < 6; ++j)
1908                                 pci_write_config_dword(pd,
1909                                         PCI_BASE_ADDRESS_0 + j*4,
1910                                         pd->resource[j].start);
1911                         pci_write_config_dword(pd, PCI_ROM_ADDRESS,
1912                                 ps->rom_address);
1913                         pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
1914                                 ps->cache_lat);
1915                         pci_write_config_word(pd, PCI_INTERRUPT_LINE,
1916                                 ps->intr);
1917                         pci_write_config_word(pd, PCI_COMMAND, ps->command);
1918                         break;
1919                 }
1920 #endif
1921         }
1922 }
1923
1924 #ifdef DEBUG_SLEEP
1925 /* N.B. This doesn't work on the 3400 */
1926 void
1927 pmu_blink(int n)
1928 {
1929         struct adb_request req;
1930
1931         memset(&req, 0, sizeof(req));
1932
1933         for (; n > 0; --n) {
1934                 req.nbytes = 4;
1935                 req.done = NULL;
1936                 req.data[0] = 0xee;
1937                 req.data[1] = 4;
1938                 req.data[2] = 0;
1939                 req.data[3] = 1;
1940                 req.reply[0] = ADB_RET_OK;
1941                 req.reply_len = 1;
1942                 req.reply_expected = 0;
1943                 pmu_polled_request(&req);
1944                 mdelay(50);
1945                 req.nbytes = 4;
1946                 req.done = NULL;
1947                 req.data[0] = 0xee;
1948                 req.data[1] = 4;
1949                 req.data[2] = 0;
1950                 req.data[3] = 0;
1951                 req.reply[0] = ADB_RET_OK;
1952                 req.reply_len = 1;
1953                 req.reply_expected = 0;
1954                 pmu_polled_request(&req);
1955                 mdelay(50);
1956         }
1957         mdelay(50);
1958 }
1959 #endif
1960
1961 /*
1962  * Put the powerbook to sleep.
1963  */
1964
1965 static u32 save_via[8];
1966
1967 static void
1968 save_via_state(void)
1969 {
1970         save_via[0] = in_8(&via[ANH]);
1971         save_via[1] = in_8(&via[DIRA]);
1972         save_via[2] = in_8(&via[B]);
1973         save_via[3] = in_8(&via[DIRB]);
1974         save_via[4] = in_8(&via[PCR]);
1975         save_via[5] = in_8(&via[ACR]);
1976         save_via[6] = in_8(&via[T1CL]);
1977         save_via[7] = in_8(&via[T1CH]);
1978 }
1979 static void
1980 restore_via_state(void)
1981 {
1982         out_8(&via[ANH], save_via[0]);
1983         out_8(&via[DIRA], save_via[1]);
1984         out_8(&via[B], save_via[2]);
1985         out_8(&via[DIRB], save_via[3]);
1986         out_8(&via[PCR], save_via[4]);
1987         out_8(&via[ACR], save_via[5]);
1988         out_8(&via[T1CL], save_via[6]);
1989         out_8(&via[T1CH], save_via[7]);
1990         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
1991         out_8(&via[IFR], 0x7f);                         /* clear IFR */
1992         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1993 }
1994
1995 extern void pmu_backlight_set_sleep(int sleep);
1996
1997 static int
1998 pmac_suspend_devices(void)
1999 {
2000         int ret;
2001
2002         pm_prepare_console();
2003
2004         /* Notify old-style device drivers */
2005         broadcast_sleep(PBOOK_SLEEP_REQUEST);
2006
2007         /* Sync the disks. */
2008         /* XXX It would be nice to have some way to ensure that
2009          * nobody is dirtying any new buffers while we wait. That
2010          * could be achieved using the refrigerator for processes
2011          * that swsusp uses
2012          */
2013         sys_sync();
2014
2015         broadcast_sleep(PBOOK_SLEEP_NOW);
2016
2017         /* Send suspend call to devices, hold the device core's dpm_sem */
2018         ret = device_suspend(PMSG_SUSPEND);
2019         if (ret) {
2020                 broadcast_wake();
2021                 printk(KERN_ERR "Driver sleep failed\n");
2022                 return -EBUSY;
2023         }
2024
2025 #ifdef CONFIG_PMAC_BACKLIGHT
2026         /* Tell backlight code not to muck around with the chip anymore */
2027         pmu_backlight_set_sleep(1);
2028 #endif
2029
2030         /* Call platform functions marked "on sleep" */
2031         pmac_pfunc_i2c_suspend();
2032         pmac_pfunc_base_suspend();
2033
2034         /* Stop preemption */
2035         preempt_disable();
2036
2037         /* Make sure the decrementer won't interrupt us */
2038         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2039         /* Make sure any pending DEC interrupt occurring while we did
2040          * the above didn't re-enable the DEC */
2041         mb();
2042         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2043
2044         /* We can now disable MSR_EE. This code of course works properly only
2045          * on UP machines... For SMP, if we ever implement sleep, we'll have to
2046          * stop the "other" CPUs way before we do all that stuff.
2047          */
2048         local_irq_disable();
2049
2050         /* Broadcast power down irq
2051          * This isn't that useful in most cases (only directly wired devices can
2052          * use this but still... This will take care of sysdev's as well, so
2053          * we exit from here with local irqs disabled and PIC off.
2054          */
2055         ret = device_power_down(PMSG_SUSPEND);
2056         if (ret) {
2057                 wakeup_decrementer();
2058                 local_irq_enable();
2059                 preempt_enable();
2060                 device_resume();
2061                 broadcast_wake();
2062                 printk(KERN_ERR "Driver powerdown failed\n");
2063                 return -EBUSY;
2064         }
2065
2066         /* Wait for completion of async requests */
2067         while (!batt_req.complete)
2068                 pmu_poll();
2069
2070         /* Giveup the lazy FPU & vec so we don't have to back them
2071          * up from the low level code
2072          */
2073         enable_kernel_fp();
2074
2075 #ifdef CONFIG_ALTIVEC
2076         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2077                 enable_kernel_altivec();
2078 #endif /* CONFIG_ALTIVEC */
2079
2080         return 0;
2081 }
2082
2083 static int
2084 pmac_wakeup_devices(void)
2085 {
2086         mdelay(100);
2087
2088 #ifdef CONFIG_PMAC_BACKLIGHT
2089         /* Tell backlight code it can use the chip again */
2090         pmu_backlight_set_sleep(0);
2091 #endif
2092
2093         /* Power back up system devices (including the PIC) */
2094         device_power_up();
2095
2096         /* Force a poll of ADB interrupts */
2097         adb_int_pending = 1;
2098         via_pmu_interrupt(0, NULL);
2099
2100         /* Restart jiffies & scheduling */
2101         wakeup_decrementer();
2102
2103         /* Re-enable local CPU interrupts */
2104         local_irq_enable();
2105         mdelay(10);
2106         preempt_enable();
2107
2108         /* Call platform functions marked "on wake" */
2109         pmac_pfunc_base_resume();
2110         pmac_pfunc_i2c_resume();
2111
2112         /* Resume devices */
2113         device_resume();
2114
2115         /* Notify old style drivers */
2116         broadcast_wake();
2117
2118         pm_restore_console();
2119
2120         return 0;
2121 }
2122
2123 #define GRACKLE_PM      (1<<7)
2124 #define GRACKLE_DOZE    (1<<5)
2125 #define GRACKLE_NAP     (1<<4)
2126 #define GRACKLE_SLEEP   (1<<3)
2127
2128 static int powerbook_sleep_grackle(void)
2129 {
2130         unsigned long save_l2cr;
2131         unsigned short pmcr1;
2132         struct adb_request req;
2133         int ret;
2134         struct pci_dev *grackle;
2135
2136         grackle = pci_find_slot(0, 0);
2137         if (!grackle)
2138                 return -ENODEV;
2139
2140         ret = pmac_suspend_devices();
2141         if (ret) {
2142                 printk(KERN_ERR "Sleep rejected by devices\n");
2143                 return ret;
2144         }
2145
2146         /* Turn off various things. Darwin does some retry tests here... */
2147         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2148         pmu_wait_complete(&req);
2149         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2150                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2151         pmu_wait_complete(&req);
2152
2153         /* For 750, save backside cache setting and disable it */
2154         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2155
2156         if (!__fake_sleep) {
2157                 /* Ask the PMU to put us to sleep */
2158                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2159                 pmu_wait_complete(&req);
2160         }
2161
2162         /* The VIA is supposed not to be restored correctly*/
2163         save_via_state();
2164         /* We shut down some HW */
2165         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2166
2167         pci_read_config_word(grackle, 0x70, &pmcr1);
2168         /* Apparently, MacOS uses NAP mode for Grackle ??? */
2169         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2170         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2171         pci_write_config_word(grackle, 0x70, pmcr1);
2172
2173         /* Call low-level ASM sleep handler */
2174         if (__fake_sleep)
2175                 mdelay(5000);
2176         else
2177                 low_sleep_handler();
2178
2179         /* We're awake again, stop grackle PM */
2180         pci_read_config_word(grackle, 0x70, &pmcr1);
2181         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2182         pci_write_config_word(grackle, 0x70, pmcr1);
2183
2184         /* Make sure the PMU is idle */
2185         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2186         restore_via_state();
2187
2188         /* Restore L2 cache */
2189         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2190                 _set_L2CR(save_l2cr);
2191
2192         /* Restore userland MMU context */
2193         set_context(current->active_mm->context.id, current->active_mm->pgd);
2194
2195         /* Power things up */
2196         pmu_unlock();
2197         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2198         pmu_wait_complete(&req);
2199         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2200                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2201         pmu_wait_complete(&req);
2202         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2203                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2204         pmu_wait_complete(&req);
2205
2206         pmac_wakeup_devices();
2207
2208         return 0;
2209 }
2210
2211 static int
2212 powerbook_sleep_Core99(void)
2213 {
2214         unsigned long save_l2cr;
2215         unsigned long save_l3cr;
2216         struct adb_request req;
2217         int ret;
2218
2219         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2220                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2221                 return -ENOSYS;
2222         }
2223
2224         if (num_online_cpus() > 1 || cpu_is_offline(0))
2225                 return -EAGAIN;
2226
2227         ret = pmac_suspend_devices();
2228         if (ret) {
2229                 printk(KERN_ERR "Sleep rejected by devices\n");
2230                 return ret;
2231         }
2232
2233         /* Stop environment and ADB interrupts */
2234         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2235         pmu_wait_complete(&req);
2236
2237         /* Tell PMU what events will wake us up */
2238         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2239                 0xff, 0xff);
2240         pmu_wait_complete(&req);
2241         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2242                 0, PMU_PWR_WAKEUP_KEY |
2243                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2244         pmu_wait_complete(&req);
2245
2246         /* Save the state of the L2 and L3 caches */
2247         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
2248         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2249
2250         if (!__fake_sleep) {
2251                 /* Ask the PMU to put us to sleep */
2252                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2253                 pmu_wait_complete(&req);
2254         }
2255
2256         /* The VIA is supposed not to be restored correctly*/
2257         save_via_state();
2258
2259         /* Shut down various ASICs. There's a chance that we can no longer
2260          * talk to the PMU after this, so I moved it to _after_ sending the
2261          * sleep command to it. Still need to be checked.
2262          */
2263         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2264
2265         /* Call low-level ASM sleep handler */
2266         if (__fake_sleep)
2267                 mdelay(5000);
2268         else
2269                 low_sleep_handler();
2270
2271         /* Restore Apple core ASICs state */
2272         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2273
2274         /* Restore VIA */
2275         restore_via_state();
2276
2277         /* tweak LPJ before cpufreq is there */
2278         loops_per_jiffy *= 2;
2279
2280         /* Restore video */
2281         pmac_call_early_video_resume();
2282
2283         /* Restore L2 cache */
2284         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2285                 _set_L2CR(save_l2cr);
2286         /* Restore L3 cache */
2287         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2288                 _set_L3CR(save_l3cr);
2289
2290         /* Restore userland MMU context */
2291         set_context(current->active_mm->context.id, current->active_mm->pgd);
2292
2293         /* Tell PMU we are ready */
2294         pmu_unlock();
2295         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2296         pmu_wait_complete(&req);
2297         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2298         pmu_wait_complete(&req);
2299
2300         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2301         loops_per_jiffy /= 2;
2302
2303         pmac_wakeup_devices();
2304
2305         return 0;
2306 }
2307
2308 #define PB3400_MEM_CTRL         0xf8000000
2309 #define PB3400_MEM_CTRL_SLEEP   0x70
2310
2311 static int
2312 powerbook_sleep_3400(void)
2313 {
2314         int ret, i, x;
2315         unsigned int hid0;
2316         unsigned long p;
2317         struct adb_request sleep_req;
2318         void __iomem *mem_ctrl;
2319         unsigned int __iomem *mem_ctrl_sleep;
2320
2321         /* first map in the memory controller registers */
2322         mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2323         if (mem_ctrl == NULL) {
2324                 printk("powerbook_sleep_3400: ioremap failed\n");
2325                 return -ENOMEM;
2326         }
2327         mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2328
2329         /* Allocate room for PCI save */
2330         pbook_alloc_pci_save();
2331
2332         ret = pmac_suspend_devices();
2333         if (ret) {
2334                 pbook_free_pci_save();
2335                 printk(KERN_ERR "Sleep rejected by devices\n");
2336                 return ret;
2337         }
2338
2339         /* Save the state of PCI config space for some slots */
2340         pbook_pci_save();
2341
2342         /* Set the memory controller to keep the memory refreshed
2343            while we're asleep */
2344         for (i = 0x403f; i >= 0x4000; --i) {
2345                 out_be32(mem_ctrl_sleep, i);
2346                 do {
2347                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2348                 } while (x == 0);
2349                 if (x >= 0x100)
2350                         break;
2351         }
2352
2353         /* Ask the PMU to put us to sleep */
2354         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2355         while (!sleep_req.complete)
2356                 mb();
2357
2358         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2359
2360         /* displacement-flush the L2 cache - necessary? */
2361         for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2362                 i = *(volatile int *)p;
2363         asleep = 1;
2364
2365         /* Put the CPU into sleep mode */
2366         hid0 = mfspr(SPRN_HID0);
2367         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2368         mtspr(SPRN_HID0, hid0);
2369         mtmsr(mfmsr() | MSR_POW | MSR_EE);
2370         udelay(10);
2371
2372         /* OK, we're awake again, start restoring things */
2373         out_be32(mem_ctrl_sleep, 0x3f);
2374         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2375         pbook_pci_restore();
2376         pmu_unlock();
2377
2378         /* wait for the PMU interrupt sequence to complete */
2379         while (asleep)
2380                 mb();
2381
2382         pmac_wakeup_devices();
2383         pbook_free_pci_save();
2384         iounmap(mem_ctrl);
2385
2386         return 0;
2387 }
2388
2389 #endif /* CONFIG_PM && CONFIG_PPC32 */
2390
2391 /*
2392  * Support for /dev/pmu device
2393  */
2394 #define RB_SIZE         0x10
2395 struct pmu_private {
2396         struct list_head list;
2397         int     rb_get;
2398         int     rb_put;
2399         struct rb_entry {
2400                 unsigned short len;
2401                 unsigned char data[16];
2402         }       rb_buf[RB_SIZE];
2403         wait_queue_head_t wait;
2404         spinlock_t lock;
2405 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2406         int     backlight_locker;
2407 #endif
2408 };
2409
2410 static LIST_HEAD(all_pmu_pvt);
2411 static DEFINE_SPINLOCK(all_pvt_lock);
2412
2413 static void
2414 pmu_pass_intr(unsigned char *data, int len)
2415 {
2416         struct pmu_private *pp;
2417         struct list_head *list;
2418         int i;
2419         unsigned long flags;
2420
2421         if (len > sizeof(pp->rb_buf[0].data))
2422                 len = sizeof(pp->rb_buf[0].data);
2423         spin_lock_irqsave(&all_pvt_lock, flags);
2424         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2425                 pp = list_entry(list, struct pmu_private, list);
2426                 spin_lock(&pp->lock);
2427                 i = pp->rb_put + 1;
2428                 if (i >= RB_SIZE)
2429                         i = 0;
2430                 if (i != pp->rb_get) {
2431                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2432                         rp->len = len;
2433                         memcpy(rp->data, data, len);
2434                         pp->rb_put = i;
2435                         wake_up_interruptible(&pp->wait);
2436                 }
2437                 spin_unlock(&pp->lock);
2438         }
2439         spin_unlock_irqrestore(&all_pvt_lock, flags);
2440 }
2441
2442 static int
2443 pmu_open(struct inode *inode, struct file *file)
2444 {
2445         struct pmu_private *pp;
2446         unsigned long flags;
2447
2448         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2449         if (pp == 0)
2450                 return -ENOMEM;
2451         pp->rb_get = pp->rb_put = 0;
2452         spin_lock_init(&pp->lock);
2453         init_waitqueue_head(&pp->wait);
2454         spin_lock_irqsave(&all_pvt_lock, flags);
2455 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2456         pp->backlight_locker = 0;
2457 #endif
2458         list_add(&pp->list, &all_pmu_pvt);
2459         spin_unlock_irqrestore(&all_pvt_lock, flags);
2460         file->private_data = pp;
2461         return 0;
2462 }
2463
2464 static ssize_t
2465 pmu_read(struct file *file, char __user *buf,
2466                         size_t count, loff_t *ppos)
2467 {
2468         struct pmu_private *pp = file->private_data;
2469         DECLARE_WAITQUEUE(wait, current);
2470         unsigned long flags;
2471         int ret = 0;
2472
2473         if (count < 1 || pp == 0)
2474                 return -EINVAL;
2475         if (!access_ok(VERIFY_WRITE, buf, count))
2476                 return -EFAULT;
2477
2478         spin_lock_irqsave(&pp->lock, flags);
2479         add_wait_queue(&pp->wait, &wait);
2480         current->state = TASK_INTERRUPTIBLE;
2481
2482         for (;;) {
2483                 ret = -EAGAIN;
2484                 if (pp->rb_get != pp->rb_put) {
2485                         int i = pp->rb_get;
2486                         struct rb_entry *rp = &pp->rb_buf[i];
2487                         ret = rp->len;
2488                         spin_unlock_irqrestore(&pp->lock, flags);
2489                         if (ret > count)
2490                                 ret = count;
2491                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2492                                 ret = -EFAULT;
2493                         if (++i >= RB_SIZE)
2494                                 i = 0;
2495                         spin_lock_irqsave(&pp->lock, flags);
2496                         pp->rb_get = i;
2497                 }
2498                 if (ret >= 0)
2499                         break;
2500                 if (file->f_flags & O_NONBLOCK)
2501                         break;
2502                 ret = -ERESTARTSYS;
2503                 if (signal_pending(current))
2504                         break;
2505                 spin_unlock_irqrestore(&pp->lock, flags);
2506                 schedule();
2507                 spin_lock_irqsave(&pp->lock, flags);
2508         }
2509         current->state = TASK_RUNNING;
2510         remove_wait_queue(&pp->wait, &wait);
2511         spin_unlock_irqrestore(&pp->lock, flags);
2512
2513         return ret;
2514 }
2515
2516 static ssize_t
2517 pmu_write(struct file *file, const char __user *buf,
2518                          size_t count, loff_t *ppos)
2519 {
2520         return 0;
2521 }
2522
2523 static unsigned int
2524 pmu_fpoll(struct file *filp, poll_table *wait)
2525 {
2526         struct pmu_private *pp = filp->private_data;
2527         unsigned int mask = 0;
2528         unsigned long flags;
2529
2530         if (pp == 0)
2531                 return 0;
2532         poll_wait(filp, &pp->wait, wait);
2533         spin_lock_irqsave(&pp->lock, flags);
2534         if (pp->rb_get != pp->rb_put)
2535                 mask |= POLLIN;
2536         spin_unlock_irqrestore(&pp->lock, flags);
2537         return mask;
2538 }
2539
2540 static int
2541 pmu_release(struct inode *inode, struct file *file)
2542 {
2543         struct pmu_private *pp = file->private_data;
2544         unsigned long flags;
2545
2546         lock_kernel();
2547         if (pp != 0) {
2548                 file->private_data = NULL;
2549                 spin_lock_irqsave(&all_pvt_lock, flags);
2550                 list_del(&pp->list);
2551                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2552
2553 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2554                 if (pp->backlight_locker)
2555                         pmac_backlight_enable();
2556 #endif
2557
2558                 kfree(pp);
2559         }
2560         unlock_kernel();
2561         return 0;
2562 }
2563
2564 static int
2565 pmu_ioctl(struct inode * inode, struct file *filp,
2566                      u_int cmd, u_long arg)
2567 {
2568         __u32 __user *argp = (__u32 __user *)arg;
2569         int error = -EINVAL;
2570
2571         switch (cmd) {
2572 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2573         case PMU_IOC_SLEEP:
2574                 if (!capable(CAP_SYS_ADMIN))
2575                         return -EACCES;
2576                 if (sleep_in_progress)
2577                         return -EBUSY;
2578                 sleep_in_progress = 1;
2579                 switch (pmu_kind) {
2580                 case PMU_OHARE_BASED:
2581                         error = powerbook_sleep_3400();
2582                         break;
2583                 case PMU_HEATHROW_BASED:
2584                 case PMU_PADDINGTON_BASED:
2585                         error = powerbook_sleep_grackle();
2586                         break;
2587                 case PMU_KEYLARGO_BASED:
2588                         error = powerbook_sleep_Core99();
2589                         break;
2590                 default:
2591                         error = -ENOSYS;
2592                 }
2593                 sleep_in_progress = 0;
2594                 break;
2595         case PMU_IOC_CAN_SLEEP:
2596                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2597                         return put_user(0, argp);
2598                 else
2599                         return put_user(1, argp);
2600 #endif /* CONFIG_PM && CONFIG_PPC32 */
2601
2602 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2603         /* Compatibility ioctl's for backlight */
2604         case PMU_IOC_GET_BACKLIGHT:
2605         {
2606                 int brightness;
2607
2608                 if (sleep_in_progress)
2609                         return -EBUSY;
2610
2611                 brightness = pmac_backlight_get_legacy_brightness();
2612                 if (brightness < 0)
2613                         return brightness;
2614                 else
2615                         return put_user(brightness, argp);
2616
2617         }
2618         case PMU_IOC_SET_BACKLIGHT:
2619         {
2620                 int brightness;
2621
2622                 if (sleep_in_progress)
2623                         return -EBUSY;
2624
2625                 error = get_user(brightness, argp);
2626                 if (error)
2627                         return error;
2628
2629                 return pmac_backlight_set_legacy_brightness(brightness);
2630         }
2631 #ifdef CONFIG_INPUT_ADBHID
2632         case PMU_IOC_GRAB_BACKLIGHT: {
2633                 struct pmu_private *pp = filp->private_data;
2634
2635                 if (pp->backlight_locker)
2636                         return 0;
2637
2638                 pp->backlight_locker = 1;
2639                 pmac_backlight_disable();
2640
2641                 return 0;
2642         }
2643 #endif /* CONFIG_INPUT_ADBHID */
2644 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2645
2646         case PMU_IOC_GET_MODEL:
2647                 return put_user(pmu_kind, argp);
2648         case PMU_IOC_HAS_ADB:
2649                 return put_user(pmu_has_adb, argp);
2650         }
2651         return error;
2652 }
2653
2654 static const struct file_operations pmu_device_fops = {
2655         .read           = pmu_read,
2656         .write          = pmu_write,
2657         .poll           = pmu_fpoll,
2658         .ioctl          = pmu_ioctl,
2659         .open           = pmu_open,
2660         .release        = pmu_release,
2661 };
2662
2663 static struct miscdevice pmu_device = {
2664         PMU_MINOR, "pmu", &pmu_device_fops
2665 };
2666
2667 static int pmu_device_init(void)
2668 {
2669         if (!via)
2670                 return 0;
2671         if (misc_register(&pmu_device) < 0)
2672                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2673         return 0;
2674 }
2675 device_initcall(pmu_device_init);
2676
2677
2678 #ifdef DEBUG_SLEEP
2679 static inline void
2680 polled_handshake(volatile unsigned char __iomem *via)
2681 {
2682         via[B] &= ~TREQ; eieio();
2683         while ((via[B] & TACK) != 0)
2684                 ;
2685         via[B] |= TREQ; eieio();
2686         while ((via[B] & TACK) == 0)
2687                 ;
2688 }
2689
2690 static inline void
2691 polled_send_byte(volatile unsigned char __iomem *via, int x)
2692 {
2693         via[ACR] |= SR_OUT | SR_EXT; eieio();
2694         via[SR] = x; eieio();
2695         polled_handshake(via);
2696 }
2697
2698 static inline int
2699 polled_recv_byte(volatile unsigned char __iomem *via)
2700 {
2701         int x;
2702
2703         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2704         x = via[SR]; eieio();
2705         polled_handshake(via);
2706         x = via[SR]; eieio();
2707         return x;
2708 }
2709
2710 int
2711 pmu_polled_request(struct adb_request *req)
2712 {
2713         unsigned long flags;
2714         int i, l, c;
2715         volatile unsigned char __iomem *v = via;
2716
2717         req->complete = 1;
2718         c = req->data[0];
2719         l = pmu_data_len[c][0];
2720         if (l >= 0 && req->nbytes != l + 1)
2721                 return -EINVAL;
2722
2723         local_irq_save(flags);
2724         while (pmu_state != idle)
2725                 pmu_poll();
2726
2727         while ((via[B] & TACK) == 0)
2728                 ;
2729         polled_send_byte(v, c);
2730         if (l < 0) {
2731                 l = req->nbytes - 1;
2732                 polled_send_byte(v, l);
2733         }
2734         for (i = 1; i <= l; ++i)
2735                 polled_send_byte(v, req->data[i]);
2736
2737         l = pmu_data_len[c][1];
2738         if (l < 0)
2739                 l = polled_recv_byte(v);
2740         for (i = 0; i < l; ++i)
2741                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2742
2743         if (req->done)
2744                 (*req->done)(req);
2745
2746         local_irq_restore(flags);
2747         return 0;
2748 }
2749 #endif /* DEBUG_SLEEP */
2750
2751
2752 /* FIXME: This is a temporary set of callbacks to enable us
2753  * to do suspend-to-disk.
2754  */
2755
2756 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2757
2758 static int pmu_sys_suspended;
2759
2760 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2761 {
2762         if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2763                 return 0;
2764
2765         /* Suspend PMU event interrupts */
2766         pmu_suspend();
2767
2768         pmu_sys_suspended = 1;
2769         return 0;
2770 }
2771
2772 static int pmu_sys_resume(struct sys_device *sysdev)
2773 {
2774         struct adb_request req;
2775
2776         if (!pmu_sys_suspended)
2777                 return 0;
2778
2779         /* Tell PMU we are ready */
2780         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2781         pmu_wait_complete(&req);
2782
2783         /* Resume PMU event interrupts */
2784         pmu_resume();
2785
2786         pmu_sys_suspended = 0;
2787
2788         return 0;
2789 }
2790
2791 #endif /* CONFIG_PM && CONFIG_PPC32 */
2792
2793 static struct sysdev_class pmu_sysclass = {
2794         set_kset_name("pmu"),
2795 };
2796
2797 static struct sys_device device_pmu = {
2798         .cls            = &pmu_sysclass,
2799 };
2800
2801 static struct sysdev_driver driver_pmu = {
2802 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2803         .suspend        = &pmu_sys_suspend,
2804         .resume         = &pmu_sys_resume,
2805 #endif /* CONFIG_PM && CONFIG_PPC32 */
2806 };
2807
2808 static int __init init_pmu_sysfs(void)
2809 {
2810         int rc;
2811
2812         rc = sysdev_class_register(&pmu_sysclass);
2813         if (rc) {
2814                 printk(KERN_ERR "Failed registering PMU sys class\n");
2815                 return -ENODEV;
2816         }
2817         rc = sysdev_register(&device_pmu);
2818         if (rc) {
2819                 printk(KERN_ERR "Failed registering PMU sys device\n");
2820                 return -ENODEV;
2821         }
2822         rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2823         if (rc) {
2824                 printk(KERN_ERR "Failed registering PMU sys driver\n");
2825                 return -ENODEV;
2826         }
2827         return 0;
2828 }
2829
2830 subsys_initcall(init_pmu_sysfs);
2831
2832 EXPORT_SYMBOL(pmu_request);
2833 EXPORT_SYMBOL(pmu_queue_request);
2834 EXPORT_SYMBOL(pmu_poll);
2835 EXPORT_SYMBOL(pmu_poll_adb);
2836 EXPORT_SYMBOL(pmu_wait_complete);
2837 EXPORT_SYMBOL(pmu_suspend);
2838 EXPORT_SYMBOL(pmu_resume);
2839 EXPORT_SYMBOL(pmu_unlock);
2840 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2841 EXPORT_SYMBOL(pmu_enable_irled);
2842 EXPORT_SYMBOL(pmu_battery_count);
2843 EXPORT_SYMBOL(pmu_batteries);
2844 EXPORT_SYMBOL(pmu_power_flags);
2845 #endif /* CONFIG_PM && CONFIG_PPC32 */
2846