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