git.oblomov.eu Git - linux-2.6/blob - drivers/macintosh/via-pmu.c

   1 /*
   2  * Device driver for the via-pmu on Apple Powermacs.
   3  *
   4  * The VIA (versatile interface adapter) interfaces to the PMU,
   5  * a 6805 microprocessor core whose primary function is to control
   6  * battery charging and system power on the PowerBook 3400 and 2400.
   7  * The PMU also controls the ADB (Apple Desktop Bus) which connects
   8  * to the keyboard and mouse, as well as the non-volatile RAM
   9  * and the RTC (real time clock) chip.
  10  *
  11  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
  12  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
  13  *
  14  * THIS DRIVER IS BECOMING A TOTAL MESS !
  15  *  - Cleanup atomically disabling reply to PMU events after
  16  *    a sleep or a freq. switch
  17  *  - Move sleep code out of here to pmac_pm, merge into new
  18  *    common PM infrastructure
  19  *  - Save/Restore PCI space properly
  20  *
  21  */
  22 #include <stdarg.h>
  23 #include <linux/types.h>
  24 #include <linux/errno.h>
  25 #include <linux/kernel.h>
  26 #include <linux/delay.h>
  27 #include <linux/sched.h>
  28 #include <linux/miscdevice.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/pci.h>
  31 #include <linux/slab.h>
  32 #include <linux/poll.h>
  33 #include <linux/adb.h>
  34 #include <linux/pmu.h>
  35 #include <linux/cuda.h>
  36 #include <linux/smp_lock.h>
  37 #include <linux/module.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/pm.h>
  40 #include <linux/proc_fs.h>
  41 #include <linux/init.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/device.h>
  44 #include <linux/sysdev.h>
  45 #include <linux/freezer.h>
  46 #include <linux/syscalls.h>
  47 #include <linux/suspend.h>
  48 #include <linux/cpu.h>
  49 #include <asm/prom.h>
  50 #include <asm/machdep.h>
  51 #include <asm/io.h>
  52 #include <asm/pgtable.h>
  53 #include <asm/system.h>
  54 #include <asm/sections.h>
  55 #include <asm/irq.h>
  56 #include <asm/pmac_feature.h>
  57 #include <asm/pmac_pfunc.h>
  58 #include <asm/pmac_low_i2c.h>
  59 #include <asm/uaccess.h>
  60 #include <asm/mmu_context.h>
  61 #include <asm/cputable.h>
  62 #include <asm/time.h>
  63 #include <asm/backlight.h>
  64
  65 #include "via-pmu-event.h"
  66
  67 /* Some compile options */
  68 #undef SUSPEND_USES_PMU
  69 #define DEBUG_SLEEP
  70 #undef HACKED_PCI_SAVE
  71
  72 /* Misc minor number allocated for /dev/pmu */
  73 #define PMU_MINOR               154
  74
  75 /* How many iterations between battery polls */
  76 #define BATTERY_POLLING_COUNT   2
  77
  78 static volatile unsigned char __iomem *via;
  79
  80 /* VIA registers - spaced 0x200 bytes apart */
  81 #define RS              0x200           /* skip between registers */
  82 #define B               0               /* B-side data */
  83 #define A               RS              /* A-side data */
  84 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  85 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  86 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  87 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  88 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  89 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  90 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  91 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  92 #define SR              (10*RS)         /* Shift register */
  93 #define ACR             (11*RS)         /* Auxiliary control register */
  94 #define PCR             (12*RS)         /* Peripheral control register */
  95 #define IFR             (13*RS)         /* Interrupt flag register */
  96 #define IER             (14*RS)         /* Interrupt enable register */
  97 #define ANH             (15*RS)         /* A-side data, no handshake */
  98
  99 /* Bits in B data register: both active low */
 100 #define TACK            0x08            /* Transfer acknowledge (input) */
 101 #define TREQ            0x10            /* Transfer request (output) */
 102
 103 /* Bits in ACR */
 104 #define SR_CTRL         0x1c            /* Shift register control bits */
 105 #define SR_EXT          0x0c            /* Shift on external clock */
 106 #define SR_OUT          0x10            /* Shift out if 1 */
 107
 108 /* Bits in IFR and IER */
 109 #define IER_SET         0x80            /* set bits in IER */
 110 #define IER_CLR         0               /* clear bits in IER */
 111 #define SR_INT          0x04            /* Shift register full/empty */
 112 #define CB2_INT         0x08
 113 #define CB1_INT         0x10            /* transition on CB1 input */
 114
 115 static volatile enum pmu_state {
 116         idle,
 117         sending,
 118         intack,
 119         reading,
 120         reading_intr,
 121         locked,
 122 } pmu_state;
 123
 124 static volatile enum int_data_state {
 125         int_data_empty,
 126         int_data_fill,
 127         int_data_ready,
 128         int_data_flush
 129 } int_data_state[2] = { int_data_empty, int_data_empty };
 130
 131 static struct adb_request *current_req;
 132 static struct adb_request *last_req;
 133 static struct adb_request *req_awaiting_reply;
 134 static unsigned char interrupt_data[2][32];
 135 static int interrupt_data_len[2];
 136 static int int_data_last;
 137 static unsigned char *reply_ptr;
 138 static int data_index;
 139 static int data_len;
 140 static volatile int adb_int_pending;
 141 static volatile int disable_poll;
 142 static struct device_node *vias;
 143 static int pmu_kind = PMU_UNKNOWN;
 144 static int pmu_fully_inited;
 145 static int pmu_has_adb;
 146 static struct device_node *gpio_node;
 147 static unsigned char __iomem *gpio_reg;
 148 static int gpio_irq = NO_IRQ;
 149 static int gpio_irq_enabled = -1;
 150 static volatile int pmu_suspended;
 151 static spinlock_t pmu_lock;
 152 static u8 pmu_intr_mask;
 153 static int pmu_version;
 154 static int drop_interrupts;
 155 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 156 static int option_lid_wakeup = 1;
 157 #endif /* CONFIG_PM && CONFIG_PPC32 */
 158 #if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT_LEGACY)
 159 static int sleep_in_progress;
 160 #endif
 161 static unsigned long async_req_locks;
 162 static unsigned int pmu_irq_stats[11];
 163
 164 static struct proc_dir_entry *proc_pmu_root;
 165 static struct proc_dir_entry *proc_pmu_info;
 166 static struct proc_dir_entry *proc_pmu_irqstats;
 167 static struct proc_dir_entry *proc_pmu_options;
 168 static int option_server_mode;
 169
 170 int pmu_battery_count;
 171 int pmu_cur_battery;
 172 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 173 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 174 static int query_batt_timer = BATTERY_POLLING_COUNT;
 175 static struct adb_request batt_req;
 176 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 177
 178 int __fake_sleep;
 179 int asleep;
 180 BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
 181
 182 #ifdef CONFIG_ADB
 183 static int adb_dev_map;
 184 static int pmu_adb_flags;
 185
 186 static int pmu_probe(void);
 187 static int pmu_init(void);
 188 static int pmu_send_request(struct adb_request *req, int sync);
 189 static int pmu_adb_autopoll(int devs);
 190 static int pmu_adb_reset_bus(void);
 191 #endif /* CONFIG_ADB */
 192
 193 static int init_pmu(void);
 194 static void pmu_start(void);
 195 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
 196 static irqreturn_t gpio1_interrupt(int irq, void *arg);
 197 static int proc_get_info(char *page, char **start, off_t off,
 198                           int count, int *eof, void *data);
 199 static int proc_get_irqstats(char *page, char **start, off_t off,
 200                           int count, int *eof, void *data);
 201 static void pmu_pass_intr(unsigned char *data, int len);
 202 static int proc_get_batt(char *page, char **start, off_t off,
 203                         int count, int *eof, void *data);
 204 static int proc_read_options(char *page, char **start, off_t off,
 205                         int count, int *eof, void *data);
 206 static int proc_write_options(struct file *file, const char __user *buffer,
 207                         unsigned long count, void *data);
 208
 209 #ifdef CONFIG_ADB
 210 struct adb_driver via_pmu_driver = {
 211         "PMU",
 212         pmu_probe,
 213         pmu_init,
 214         pmu_send_request,
 215         pmu_adb_autopoll,
 216         pmu_poll_adb,
 217         pmu_adb_reset_bus
 218 };
 219 #endif /* CONFIG_ADB */
 220
 221 extern void low_sleep_handler(void);
 222 extern void enable_kernel_altivec(void);
 223 extern void enable_kernel_fp(void);
 224
 225 #ifdef DEBUG_SLEEP
 226 int pmu_polled_request(struct adb_request *req);
 227 int pmu_wink(struct adb_request *req);
 228 #endif
 229
 230 /*
 231  * This table indicates for each PMU opcode:
 232  * - the number of data bytes to be sent with the command, or -1
 233  *   if a length byte should be sent,
 234  * - the number of response bytes which the PMU will return, or
 235  *   -1 if it will send a length byte.
 236  */
 237 static const s8 pmu_data_len[256][2] = {
 238 /*         0       1       2       3       4       5       6       7  */
 239 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 240 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 241 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 242 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 243 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 244 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 245 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 246 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 247 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 248 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 249 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 250 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 251 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 252 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 253 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 254 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 255 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 256 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 257 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 258 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 259 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 260 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 261 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 262 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 263 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 264 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 265 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 266 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 267 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 268 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 269 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 270 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 271 };
 272
 273 static char *pbook_type[] = {
 274         "Unknown PowerBook",
 275         "PowerBook 2400/3400/3500(G3)",
 276         "PowerBook G3 Series",
 277         "1999 PowerBook G3",
 278         "Core99"
 279 };
 280
 281 int __init find_via_pmu(void)
 282 {
 283         u64 taddr;
 284         const u32 *reg;
 285
 286         if (via != 0)
 287                 return 1;
 288         vias = of_find_node_by_name(NULL, "via-pmu");
 289         if (vias == NULL)
 290                 return 0;
 291
 292         reg = of_get_property(vias, "reg", NULL);
 293         if (reg == NULL) {
 294                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 295                 goto fail;
 296         }
 297         taddr = of_translate_address(vias, reg);
 298         if (taddr == OF_BAD_ADDR) {
 299                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 300                 goto fail;
 301         }
 302
 303         spin_lock_init(&pmu_lock);
 304
 305         pmu_has_adb = 1;
 306
 307         pmu_intr_mask = PMU_INT_PCEJECT |
 308                         PMU_INT_SNDBRT |
 309                         PMU_INT_ADB |
 310                         PMU_INT_TICK;
 311
 312         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 313             || of_device_is_compatible(vias->parent, "ohare")))
 314                 pmu_kind = PMU_OHARE_BASED;
 315         else if (of_device_is_compatible(vias->parent, "paddington"))
 316                 pmu_kind = PMU_PADDINGTON_BASED;
 317         else if (of_device_is_compatible(vias->parent, "heathrow"))
 318                 pmu_kind = PMU_HEATHROW_BASED;
 319         else if (of_device_is_compatible(vias->parent, "Keylargo")
 320                  || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
 321                 struct device_node *gpiop;
 322                 struct device_node *adbp;
 323                 u64 gaddr = OF_BAD_ADDR;
 324
 325                 pmu_kind = PMU_KEYLARGO_BASED;
 326                 adbp = of_find_node_by_type(NULL, "adb");
 327                 pmu_has_adb = (adbp != NULL);
 328                 of_node_put(adbp);
 329                 pmu_intr_mask = PMU_INT_PCEJECT |
 330                                 PMU_INT_SNDBRT |
 331                                 PMU_INT_ADB |
 332                                 PMU_INT_TICK |
 333                                 PMU_INT_ENVIRONMENT;
 334
 335                 gpiop = of_find_node_by_name(NULL, "gpio");
 336                 if (gpiop) {
 337                         reg = of_get_property(gpiop, "reg", NULL);
 338                         if (reg)
 339                                 gaddr = of_translate_address(gpiop, reg);
 340                         if (gaddr != OF_BAD_ADDR)
 341                                 gpio_reg = ioremap(gaddr, 0x10);
 342                 }
 343                 if (gpio_reg == NULL) {
 344                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 345                         goto fail_gpio;
 346                 }
 347         } else
 348                 pmu_kind = PMU_UNKNOWN;
 349
 350         via = ioremap(taddr, 0x2000);
 351         if (via == NULL) {
 352                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 353                 goto fail;
 354         }
 355
 356         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 357         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 358
 359         pmu_state = idle;
 360
 361         if (!init_pmu()) {
 362                 via = NULL;
 363                 return 0;
 364         }
 365
 366         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 367                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 368
 369         sys_ctrler = SYS_CTRLER_PMU;
 370
 371         return 1;
 372  fail:
 373         of_node_put(vias);
 374         iounmap(gpio_reg);
 375         gpio_reg = NULL;
 376  fail_gpio:
 377         vias = NULL;
 378         return 0;
 379 }
 380
 381 #ifdef CONFIG_ADB
 382 static int pmu_probe(void)
 383 {
 384         return vias == NULL? -ENODEV: 0;
 385 }
 386
 387 static int __init pmu_init(void)
 388 {
 389         if (vias == NULL)
 390                 return -ENODEV;
 391         return 0;
 392 }
 393 #endif /* CONFIG_ADB */
 394
 395 /*
 396  * We can't wait until pmu_init gets called, that happens too late.
 397  * It happens after IDE and SCSI initialization, which can take a few
 398  * seconds, and by that time the PMU could have given up on us and
 399  * turned us off.
 400  * Thus this is called with arch_initcall rather than device_initcall.
 401  */
 402 static int __init via_pmu_start(void)
 403 {
 404         unsigned int irq;
 405
 406         if (vias == NULL)
 407                 return -ENODEV;
 408
 409         batt_req.complete = 1;
 410
 411         irq = irq_of_parse_and_map(vias, 0);
 412         if (irq == NO_IRQ) {
 413                 printk(KERN_ERR "via-pmu: can't map interruptn");
 414                 return -ENODEV;
 415         }
 416         if (request_irq(irq, via_pmu_interrupt, 0, "VIA-PMU", (void *)0)) {
 417                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 418                 return -ENODEV;
 419         }
 420
 421         if (pmu_kind == PMU_KEYLARGO_BASED) {
 422                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 423                 if (gpio_node == NULL)
 424                         gpio_node = of_find_node_by_name(NULL,
 425                                                          "pmu-interrupt");
 426                 if (gpio_node)
 427                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 428
 429                 if (gpio_irq != NO_IRQ) {
 430                         if (request_irq(gpio_irq, gpio1_interrupt, 0,
 431                                         "GPIO1 ADB", (void *)0))
 432                                 printk(KERN_ERR "pmu: can't get irq %d"
 433                                        " (GPIO1)\n", gpio_irq);
 434                         else
 435                                 gpio_irq_enabled = 1;
 436                 }
 437         }
 438
 439         /* Enable interrupts */
 440         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 441
 442         pmu_fully_inited = 1;
 443
 444         /* Make sure PMU settle down before continuing. This is _very_ important
 445          * since the IDE probe may shut interrupts down for quite a bit of time. If
 446          * a PMU communication is pending while this happens, the PMU may timeout
 447          * Not that on Core99 machines, the PMU keeps sending us environement
 448          * messages, we should find a way to either fix IDE or make it call
 449          * pmu_suspend() before masking interrupts. This can also happens while
 450          * scolling with some fbdevs.
 451          */
 452         do {
 453                 pmu_poll();
 454         } while (pmu_state != idle);
 455
 456         return 0;
 457 }
 458
 459 arch_initcall(via_pmu_start);
 460
 461 /*
 462  * This has to be done after pci_init, which is a subsys_initcall.
 463  */
 464 static int __init via_pmu_dev_init(void)
 465 {
 466         if (vias == NULL)
 467                 return -ENODEV;
 468
 469 #ifdef CONFIG_PMAC_BACKLIGHT
 470         /* Initialize backlight */
 471         pmu_backlight_init();
 472 #endif
 473
 474 #ifdef CONFIG_PPC32
 475         if (machine_is_compatible("AAPL,3400/2400") ||
 476                 machine_is_compatible("AAPL,3500")) {
 477                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 478                         NULL, PMAC_MB_INFO_MODEL, 0);
 479                 pmu_battery_count = 1;
 480                 if (mb == PMAC_TYPE_COMET)
 481                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 482                 else
 483                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 484         } else if (machine_is_compatible("AAPL,PowerBook1998") ||
 485                 machine_is_compatible("PowerBook1,1")) {
 486                 pmu_battery_count = 2;
 487                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 488                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 489         } else {
 490                 struct device_node* prim =
 491                         of_find_node_by_name(NULL, "power-mgt");
 492                 const u32 *prim_info = NULL;
 493                 if (prim)
 494                         prim_info = of_get_property(prim, "prim-info", NULL);
 495                 if (prim_info) {
 496                         /* Other stuffs here yet unknown */
 497                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 498                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 499                         if (pmu_battery_count > 1)
 500                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 501                 }
 502                 of_node_put(prim);
 503         }
 504 #endif /* CONFIG_PPC32 */
 505
 506         /* Create /proc/pmu */
 507         proc_pmu_root = proc_mkdir("pmu", NULL);
 508         if (proc_pmu_root) {
 509                 long i;
 510
 511                 for (i=0; i<pmu_battery_count; i++) {
 512                         char title[16];
 513                         sprintf(title, "battery_%ld", i);
 514                         proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
 515                                                 proc_get_batt, (void *)i);
 516                 }
 517
 518                 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
 519                                         proc_get_info, NULL);
 520                 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
 521                                         proc_get_irqstats, NULL);
 522                 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
 523                 if (proc_pmu_options) {
 524                         proc_pmu_options->read_proc = proc_read_options;
 525                         proc_pmu_options->write_proc = proc_write_options;
 526                 }
 527         }
 528         return 0;
 529 }
 530
 531 device_initcall(via_pmu_dev_init);
 532
 533 static int
 534 init_pmu(void)
 535 {
 536         int timeout;
 537         struct adb_request req;
 538
 539         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 540         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 541
 542         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 543         timeout =  100000;
 544         while (!req.complete) {
 545                 if (--timeout < 0) {
 546                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 547                         return 0;
 548                 }
 549                 udelay(10);
 550                 pmu_poll();
 551         }
 552
 553         /* ack all pending interrupts */
 554         timeout = 100000;
 555         interrupt_data[0][0] = 1;
 556         while (interrupt_data[0][0] || pmu_state != idle) {
 557                 if (--timeout < 0) {
 558                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 559                         return 0;
 560                 }
 561                 if (pmu_state == idle)
 562                         adb_int_pending = 1;
 563                 via_pmu_interrupt(0, NULL);
 564                 udelay(10);
 565         }
 566
 567         /* Tell PMU we are ready.  */
 568         if (pmu_kind == PMU_KEYLARGO_BASED) {
 569                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 570                 while (!req.complete)
 571                         pmu_poll();
 572         }
 573
 574         /* Read PMU version */
 575         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 576         pmu_wait_complete(&req);
 577         if (req.reply_len > 0)
 578                 pmu_version = req.reply[0];
 579
 580         /* Read server mode setting */
 581         if (pmu_kind == PMU_KEYLARGO_BASED) {
 582                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 583                             PMU_PWR_GET_POWERUP_EVENTS);
 584                 pmu_wait_complete(&req);
 585                 if (req.reply_len == 2) {
 586                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 587                                 option_server_mode = 1;
 588                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 589                                option_server_mode ? "enabled" : "disabled");
 590                 }
 591         }
 592         return 1;
 593 }
 594
 595 int
 596 pmu_get_model(void)
 597 {
 598         return pmu_kind;
 599 }
 600
 601 static void pmu_set_server_mode(int server_mode)
 602 {
 603         struct adb_request req;
 604
 605         if (pmu_kind != PMU_KEYLARGO_BASED)
 606                 return;
 607
 608         option_server_mode = server_mode;
 609         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 610         pmu_wait_complete(&req);
 611         if (req.reply_len < 2)
 612                 return;
 613         if (server_mode)
 614                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 615                             PMU_PWR_SET_POWERUP_EVENTS,
 616                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 617         else
 618                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 619                             PMU_PWR_CLR_POWERUP_EVENTS,
 620                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 621         pmu_wait_complete(&req);
 622 }
 623
 624 /* This new version of the code for 2400/3400/3500 powerbooks
 625  * is inspired from the implementation in gkrellm-pmu
 626  */
 627 static void
 628 done_battery_state_ohare(struct adb_request* req)
 629 {
 630         /* format:
 631          *  [0]    :  flags
 632          *    0x01 :  AC indicator
 633          *    0x02 :  charging
 634          *    0x04 :  battery exist
 635          *    0x08 :
 636          *    0x10 :
 637          *    0x20 :  full charged
 638          *    0x40 :  pcharge reset
 639          *    0x80 :  battery exist
 640          *
 641          *  [1][2] :  battery voltage
 642          *  [3]    :  CPU temperature
 643          *  [4]    :  battery temperature
 644          *  [5]    :  current
 645          *  [6][7] :  pcharge
 646          *              --tkoba
 647          */
 648         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 649         long pcharge, charge, vb, vmax, lmax;
 650         long vmax_charging, vmax_charged;
 651         long amperage, voltage, time, max;
 652         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 653                         NULL, PMAC_MB_INFO_MODEL, 0);
 654
 655         if (req->reply[0] & 0x01)
 656                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 657         else
 658                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 659
 660         if (mb == PMAC_TYPE_COMET) {
 661                 vmax_charged = 189;
 662                 vmax_charging = 213;
 663                 lmax = 6500;
 664         } else {
 665                 vmax_charged = 330;
 666                 vmax_charging = 330;
 667                 lmax = 6500;
 668         }
 669         vmax = vmax_charged;
 670
 671         /* If battery installed */
 672         if (req->reply[0] & 0x04) {
 673                 bat_flags |= PMU_BATT_PRESENT;
 674                 if (req->reply[0] & 0x02)
 675                         bat_flags |= PMU_BATT_CHARGING;
 676                 vb = (req->reply[1] << 8) | req->reply[2];
 677                 voltage = (vb * 265 + 72665) / 10;
 678                 amperage = req->reply[5];
 679                 if ((req->reply[0] & 0x01) == 0) {
 680                         if (amperage > 200)
 681                                 vb += ((amperage - 200) * 15)/100;
 682                 } else if (req->reply[0] & 0x02) {
 683                         vb = (vb * 97) / 100;
 684                         vmax = vmax_charging;
 685                 }
 686                 charge = (100 * vb) / vmax;
 687                 if (req->reply[0] & 0x40) {
 688                         pcharge = (req->reply[6] << 8) + req->reply[7];
 689                         if (pcharge > lmax)
 690                                 pcharge = lmax;
 691                         pcharge *= 100;
 692                         pcharge = 100 - pcharge / lmax;
 693                         if (pcharge < charge)
 694                                 charge = pcharge;
 695                 }
 696                 if (amperage > 0)
 697                         time = (charge * 16440) / amperage;
 698                 else
 699                         time = 0;
 700                 max = 100;
 701                 amperage = -amperage;
 702         } else
 703                 charge = max = amperage = voltage = time = 0;
 704
 705         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 706         pmu_batteries[pmu_cur_battery].charge = charge;
 707         pmu_batteries[pmu_cur_battery].max_charge = max;
 708         pmu_batteries[pmu_cur_battery].amperage = amperage;
 709         pmu_batteries[pmu_cur_battery].voltage = voltage;
 710         pmu_batteries[pmu_cur_battery].time_remaining = time;
 711
 712         clear_bit(0, &async_req_locks);
 713 }
 714
 715 static void
 716 done_battery_state_smart(struct adb_request* req)
 717 {
 718         /* format:
 719          *  [0] : format of this structure (known: 3,4,5)
 720          *  [1] : flags
 721          *
 722          *  format 3 & 4:
 723          *
 724          *  [2] : charge
 725          *  [3] : max charge
 726          *  [4] : current
 727          *  [5] : voltage
 728          *
 729          *  format 5:
 730          *
 731          *  [2][3] : charge
 732          *  [4][5] : max charge
 733          *  [6][7] : current
 734          *  [8][9] : voltage
 735          */
 736
 737         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 738         int amperage;
 739         unsigned int capa, max, voltage;
 740
 741         if (req->reply[1] & 0x01)
 742                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 743         else
 744                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 745
 746
 747         capa = max = amperage = voltage = 0;
 748
 749         if (req->reply[1] & 0x04) {
 750                 bat_flags |= PMU_BATT_PRESENT;
 751                 switch(req->reply[0]) {
 752                         case 3:
 753                         case 4: capa = req->reply[2];
 754                                 max = req->reply[3];
 755                                 amperage = *((signed char *)&req->reply[4]);
 756                                 voltage = req->reply[5];
 757                                 break;
 758                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 759                                 max = (req->reply[4] << 8) | req->reply[5];
 760                                 amperage = *((signed short *)&req->reply[6]);
 761                                 voltage = (req->reply[8] << 8) | req->reply[9];
 762                                 break;
 763                         default:
 764                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 765                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 766                                 break;
 767                 }
 768         }
 769
 770         if ((req->reply[1] & 0x01) && (amperage > 0))
 771                 bat_flags |= PMU_BATT_CHARGING;
 772
 773         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 774         pmu_batteries[pmu_cur_battery].charge = capa;
 775         pmu_batteries[pmu_cur_battery].max_charge = max;
 776         pmu_batteries[pmu_cur_battery].amperage = amperage;
 777         pmu_batteries[pmu_cur_battery].voltage = voltage;
 778         if (amperage) {
 779                 if ((req->reply[1] & 0x01) && (amperage > 0))
 780                         pmu_batteries[pmu_cur_battery].time_remaining
 781                                 = ((max-capa) * 3600) / amperage;
 782                 else
 783                         pmu_batteries[pmu_cur_battery].time_remaining
 784                                 = (capa * 3600) / (-amperage);
 785         } else
 786                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 787
 788         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 789
 790         clear_bit(0, &async_req_locks);
 791 }
 792
 793 static void
 794 query_battery_state(void)
 795 {
 796         if (test_and_set_bit(0, &async_req_locks))
 797                 return;
 798         if (pmu_kind == PMU_OHARE_BASED)
 799                 pmu_request(&batt_req, done_battery_state_ohare,
 800                         1, PMU_BATTERY_STATE);
 801         else
 802                 pmu_request(&batt_req, done_battery_state_smart,
 803                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 804 }
 805
 806 static int
 807 proc_get_info(char *page, char **start, off_t off,
 808                 int count, int *eof, void *data)
 809 {
 810         char* p = page;
 811
 812         p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 813         p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
 814         p += sprintf(p, "AC Power               : %d\n",
 815                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 816         p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);
 817
 818         return p - page;
 819 }
 820
 821 static int
 822 proc_get_irqstats(char *page, char **start, off_t off,
 823                   int count, int *eof, void *data)
 824 {
 825         int i;
 826         char* p = page;
 827         static const char *irq_names[] = {
 828                 "Total CB1 triggered events",
 829                 "Total GPIO1 triggered events",
 830                 "PC-Card eject button",
 831                 "Sound/Brightness button",
 832                 "ADB message",
 833                 "Battery state change",
 834                 "Environment interrupt",
 835                 "Tick timer",
 836                 "Ghost interrupt (zero len)",
 837                 "Empty interrupt (empty mask)",
 838                 "Max irqs in a row"
 839         };
 840
 841         for (i=0; i<11; i++) {
 842                 p += sprintf(p, " %2u: %10u (%s)\n",
 843                              i, pmu_irq_stats[i], irq_names[i]);
 844         }
 845         return p - page;
 846 }
 847
 848 static int
 849 proc_get_batt(char *page, char **start, off_t off,
 850                 int count, int *eof, void *data)
 851 {
 852         long batnum = (long)data;
 853         char *p = page;
 854
 855         p += sprintf(p, "\n");
 856         p += sprintf(p, "flags      : %08x\n",
 857                 pmu_batteries[batnum].flags);
 858         p += sprintf(p, "charge     : %d\n",
 859                 pmu_batteries[batnum].charge);
 860         p += sprintf(p, "max_charge : %d\n",
 861                 pmu_batteries[batnum].max_charge);
 862         p += sprintf(p, "current    : %d\n",
 863                 pmu_batteries[batnum].amperage);
 864         p += sprintf(p, "voltage    : %d\n",
 865                 pmu_batteries[batnum].voltage);
 866         p += sprintf(p, "time rem.  : %d\n",
 867                 pmu_batteries[batnum].time_remaining);
 868
 869         return p - page;
 870 }
 871
 872 static int
 873 proc_read_options(char *page, char **start, off_t off,
 874                         int count, int *eof, void *data)
 875 {
 876         char *p = page;
 877
 878 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 879         if (pmu_kind == PMU_KEYLARGO_BASED &&
 880             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 881                 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
 882 #endif
 883         if (pmu_kind == PMU_KEYLARGO_BASED)
 884                 p += sprintf(p, "server_mode=%d\n", option_server_mode);
 885
 886         return p - page;
 887 }
 888
 889 static int
 890 proc_write_options(struct file *file, const char __user *buffer,
 891                         unsigned long count, void *data)
 892 {
 893         char tmp[33];
 894         char *label, *val;
 895         unsigned long fcount = count;
 896
 897         if (!count)
 898                 return -EINVAL;
 899         if (count > 32)
 900                 count = 32;
 901         if (copy_from_user(tmp, buffer, count))
 902                 return -EFAULT;
 903         tmp[count] = 0;
 904
 905         label = tmp;
 906         while(*label == ' ')
 907                 label++;
 908         val = label;
 909         while(*val && (*val != '=')) {
 910                 if (*val == ' ')
 911                         *val = 0;
 912                 val++;
 913         }
 914         if ((*val) == 0)
 915                 return -EINVAL;
 916         *(val++) = 0;
 917         while(*val == ' ')
 918                 val++;
 919 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 920         if (pmu_kind == PMU_KEYLARGO_BASED &&
 921             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 922                 if (!strcmp(label, "lid_wakeup"))
 923                         option_lid_wakeup = ((*val) == '1');
 924 #endif
 925         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 926                 int new_value;
 927                 new_value = ((*val) == '1');
 928                 if (new_value != option_server_mode)
 929                         pmu_set_server_mode(new_value);
 930         }
 931         return fcount;
 932 }
 933
 934 #ifdef CONFIG_ADB
 935 /* Send an ADB command */
 936 static int
 937 pmu_send_request(struct adb_request *req, int sync)
 938 {
 939         int i, ret;
 940
 941         if ((vias == NULL) || (!pmu_fully_inited)) {
 942                 req->complete = 1;
 943                 return -ENXIO;
 944         }
 945
 946         ret = -EINVAL;
 947
 948         switch (req->data[0]) {
 949         case PMU_PACKET:
 950                 for (i = 0; i < req->nbytes - 1; ++i)
 951                         req->data[i] = req->data[i+1];
 952                 --req->nbytes;
 953                 if (pmu_data_len[req->data[0]][1] != 0) {
 954                         req->reply[0] = ADB_RET_OK;
 955                         req->reply_len = 1;
 956                 } else
 957                         req->reply_len = 0;
 958                 ret = pmu_queue_request(req);
 959                 break;
 960         case CUDA_PACKET:
 961                 switch (req->data[1]) {
 962                 case CUDA_GET_TIME:
 963                         if (req->nbytes != 2)
 964                                 break;
 965                         req->data[0] = PMU_READ_RTC;
 966                         req->nbytes = 1;
 967                         req->reply_len = 3;
 968                         req->reply[0] = CUDA_PACKET;
 969                         req->reply[1] = 0;
 970                         req->reply[2] = CUDA_GET_TIME;
 971                         ret = pmu_queue_request(req);
 972                         break;
 973                 case CUDA_SET_TIME:
 974                         if (req->nbytes != 6)
 975                                 break;
 976                         req->data[0] = PMU_SET_RTC;
 977                         req->nbytes = 5;
 978                         for (i = 1; i <= 4; ++i)
 979                                 req->data[i] = req->data[i+1];
 980                         req->reply_len = 3;
 981                         req->reply[0] = CUDA_PACKET;
 982                         req->reply[1] = 0;
 983                         req->reply[2] = CUDA_SET_TIME;
 984                         ret = pmu_queue_request(req);
 985                         break;
 986                 }
 987                 break;
 988         case ADB_PACKET:
 989                 if (!pmu_has_adb)
 990                         return -ENXIO;
 991                 for (i = req->nbytes - 1; i > 1; --i)
 992                         req->data[i+2] = req->data[i];
 993                 req->data[3] = req->nbytes - 2;
 994                 req->data[2] = pmu_adb_flags;
 995                 /*req->data[1] = req->data[1];*/
 996                 req->data[0] = PMU_ADB_CMD;
 997                 req->nbytes += 2;
 998                 req->reply_expected = 1;
 999                 req->reply_len = 0;
1000                 ret = pmu_queue_request(req);
1001                 break;
1002         }
1003         if (ret) {
1004                 req->complete = 1;
1005                 return ret;
1006         }
1007
1008         if (sync)
1009                 while (!req->complete)
1010                         pmu_poll();
1011
1012         return 0;
1013 }
1014
1015 /* Enable/disable autopolling */
1016 static int
1017 pmu_adb_autopoll(int devs)
1018 {
1019         struct adb_request req;
1020
1021         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1022                 return -ENXIO;
1023
1024         if (devs) {
1025                 adb_dev_map = devs;
1026                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1027                             adb_dev_map >> 8, adb_dev_map);
1028                 pmu_adb_flags = 2;
1029         } else {
1030                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1031                 pmu_adb_flags = 0;
1032         }
1033         while (!req.complete)
1034                 pmu_poll();
1035         return 0;
1036 }
1037
1038 /* Reset the ADB bus */
1039 static int
1040 pmu_adb_reset_bus(void)
1041 {
1042         struct adb_request req;
1043         int save_autopoll = adb_dev_map;
1044
1045         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1046                 return -ENXIO;
1047
1048         /* anyone got a better idea?? */
1049         pmu_adb_autopoll(0);
1050
1051         req.nbytes = 5;
1052         req.done = NULL;
1053         req.data[0] = PMU_ADB_CMD;
1054         req.data[1] = 0;
1055         req.data[2] = ADB_BUSRESET;
1056         req.data[3] = 0;
1057         req.data[4] = 0;
1058         req.reply_len = 0;
1059         req.reply_expected = 1;
1060         if (pmu_queue_request(&req) != 0) {
1061                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1062                 return -EIO;
1063         }
1064         pmu_wait_complete(&req);
1065
1066         if (save_autopoll != 0)
1067                 pmu_adb_autopoll(save_autopoll);
1068
1069         return 0;
1070 }
1071 #endif /* CONFIG_ADB */
1072
1073 /* Construct and send a pmu request */
1074 int
1075 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1076             int nbytes, ...)
1077 {
1078         va_list list;
1079         int i;
1080
1081         if (vias == NULL)
1082                 return -ENXIO;
1083
1084         if (nbytes < 0 || nbytes > 32) {
1085                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1086                 req->complete = 1;
1087                 return -EINVAL;
1088         }
1089         req->nbytes = nbytes;
1090         req->done = done;
1091         va_start(list, nbytes);
1092         for (i = 0; i < nbytes; ++i)
1093                 req->data[i] = va_arg(list, int);
1094         va_end(list);
1095         req->reply_len = 0;
1096         req->reply_expected = 0;
1097         return pmu_queue_request(req);
1098 }
1099
1100 int
1101 pmu_queue_request(struct adb_request *req)
1102 {
1103         unsigned long flags;
1104         int nsend;
1105
1106         if (via == NULL) {
1107                 req->complete = 1;
1108                 return -ENXIO;
1109         }
1110         if (req->nbytes <= 0) {
1111                 req->complete = 1;
1112                 return 0;
1113         }
1114         nsend = pmu_data_len[req->data[0]][0];
1115         if (nsend >= 0 && req->nbytes != nsend + 1) {
1116                 req->complete = 1;
1117                 return -EINVAL;
1118         }
1119
1120         req->next = NULL;
1121         req->sent = 0;
1122         req->complete = 0;
1123
1124         spin_lock_irqsave(&pmu_lock, flags);
1125         if (current_req != 0) {
1126                 last_req->next = req;
1127                 last_req = req;
1128         } else {
1129                 current_req = req;
1130                 last_req = req;
1131                 if (pmu_state == idle)
1132                         pmu_start();
1133         }
1134         spin_unlock_irqrestore(&pmu_lock, flags);
1135
1136         return 0;
1137 }
1138
1139 static inline void
1140 wait_for_ack(void)
1141 {
1142         /* Sightly increased the delay, I had one occurrence of the message
1143          * reported
1144          */
1145         int timeout = 4000;
1146         while ((in_8(&via[B]) & TACK) == 0) {
1147                 if (--timeout < 0) {
1148                         printk(KERN_ERR "PMU not responding (!ack)\n");
1149                         return;
1150                 }
1151                 udelay(10);
1152         }
1153 }
1154
1155 /* New PMU seems to be very sensitive to those timings, so we make sure
1156  * PCI is flushed immediately */
1157 static inline void
1158 send_byte(int x)
1159 {
1160         volatile unsigned char __iomem *v = via;
1161
1162         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1163         out_8(&v[SR], x);
1164         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1165         (void)in_8(&v[B]);
1166 }
1167
1168 static inline void
1169 recv_byte(void)
1170 {
1171         volatile unsigned char __iomem *v = via;
1172
1173         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1174         in_8(&v[SR]);           /* resets SR */
1175         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1176         (void)in_8(&v[B]);
1177 }
1178
1179 static inline void
1180 pmu_done(struct adb_request *req)
1181 {
1182         void (*done)(struct adb_request *) = req->done;
1183         mb();
1184         req->complete = 1;
1185         /* Here, we assume that if the request has a done member, the
1186          * struct request will survive to setting req->complete to 1
1187          */
1188         if (done)
1189                 (*done)(req);
1190 }
1191
1192 static void
1193 pmu_start(void)
1194 {
1195         struct adb_request *req;
1196
1197         /* assert pmu_state == idle */
1198         /* get the packet to send */
1199         req = current_req;
1200         if (req == 0 || pmu_state != idle
1201             || (/*req->reply_expected && */req_awaiting_reply))
1202                 return;
1203
1204         pmu_state = sending;
1205         data_index = 1;
1206         data_len = pmu_data_len[req->data[0]][0];
1207
1208         /* Sounds safer to make sure ACK is high before writing. This helped
1209          * kill a problem with ADB and some iBooks
1210          */
1211         wait_for_ack();
1212         /* set the shift register to shift out and send a byte */
1213         send_byte(req->data[0]);
1214 }
1215
1216 void
1217 pmu_poll(void)
1218 {
1219         if (!via)
1220                 return;
1221         if (disable_poll)
1222                 return;
1223         via_pmu_interrupt(0, NULL);
1224 }
1225
1226 void
1227 pmu_poll_adb(void)
1228 {
1229         if (!via)
1230                 return;
1231         if (disable_poll)
1232                 return;
1233         /* Kicks ADB read when PMU is suspended */
1234         adb_int_pending = 1;
1235         do {
1236                 via_pmu_interrupt(0, NULL);
1237         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1238                 || req_awaiting_reply));
1239 }
1240
1241 void
1242 pmu_wait_complete(struct adb_request *req)
1243 {
1244         if (!via)
1245                 return;
1246         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1247                 via_pmu_interrupt(0, NULL);
1248 }
1249
1250 /* This function loops until the PMU is idle and prevents it from
1251  * anwsering to ADB interrupts. pmu_request can still be called.
1252  * This is done to avoid spurrious shutdowns when we know we'll have
1253  * interrupts switched off for a long time
1254  */
1255 void
1256 pmu_suspend(void)
1257 {
1258         unsigned long flags;
1259 #ifdef SUSPEND_USES_PMU
1260         struct adb_request *req;
1261 #endif
1262         if (!via)
1263                 return;
1264
1265         spin_lock_irqsave(&pmu_lock, flags);
1266         pmu_suspended++;
1267         if (pmu_suspended > 1) {
1268                 spin_unlock_irqrestore(&pmu_lock, flags);
1269                 return;
1270         }
1271
1272         do {
1273                 spin_unlock_irqrestore(&pmu_lock, flags);
1274                 if (req_awaiting_reply)
1275                         adb_int_pending = 1;
1276                 via_pmu_interrupt(0, NULL);
1277                 spin_lock_irqsave(&pmu_lock, flags);
1278                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1279 #ifdef SUSPEND_USES_PMU
1280                         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1281                         spin_unlock_irqrestore(&pmu_lock, flags);
1282                         while(!req.complete)
1283                                 pmu_poll();
1284 #else /* SUSPEND_USES_PMU */
1285                         if (gpio_irq >= 0)
1286                                 disable_irq_nosync(gpio_irq);
1287                         out_8(&via[IER], CB1_INT | IER_CLR);
1288                         spin_unlock_irqrestore(&pmu_lock, flags);
1289 #endif /* SUSPEND_USES_PMU */
1290                         break;
1291                 }
1292         } while (1);
1293 }
1294
1295 void
1296 pmu_resume(void)
1297 {
1298         unsigned long flags;
1299
1300         if (!via || (pmu_suspended < 1))
1301                 return;
1302
1303         spin_lock_irqsave(&pmu_lock, flags);
1304         pmu_suspended--;
1305         if (pmu_suspended > 0) {
1306                 spin_unlock_irqrestore(&pmu_lock, flags);
1307                 return;
1308         }
1309         adb_int_pending = 1;
1310 #ifdef SUSPEND_USES_PMU
1311         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1312         spin_unlock_irqrestore(&pmu_lock, flags);
1313         while(!req.complete)
1314                 pmu_poll();
1315 #else /* SUSPEND_USES_PMU */
1316         if (gpio_irq >= 0)
1317                 enable_irq(gpio_irq);
1318         out_8(&via[IER], CB1_INT | IER_SET);
1319         spin_unlock_irqrestore(&pmu_lock, flags);
1320         pmu_poll();
1321 #endif /* SUSPEND_USES_PMU */
1322 }
1323
1324 /* Interrupt data could be the result data from an ADB cmd */
1325 static void
1326 pmu_handle_data(unsigned char *data, int len)
1327 {
1328         unsigned char ints, pirq;
1329         int i = 0;
1330
1331         asleep = 0;
1332         if (drop_interrupts || len < 1) {
1333                 adb_int_pending = 0;
1334                 pmu_irq_stats[8]++;
1335                 return;
1336         }
1337
1338         /* Get PMU interrupt mask */
1339         ints = data[0];
1340
1341         /* Record zero interrupts for stats */
1342         if (ints == 0)
1343                 pmu_irq_stats[9]++;
1344
1345         /* Hack to deal with ADB autopoll flag */
1346         if (ints & PMU_INT_ADB)
1347                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1348
1349 next:
1350
1351         if (ints == 0) {
1352                 if (i > pmu_irq_stats[10])
1353                         pmu_irq_stats[10] = i;
1354                 return;
1355         }
1356
1357         for (pirq = 0; pirq < 8; pirq++)
1358                 if (ints & (1 << pirq))
1359                         break;
1360         pmu_irq_stats[pirq]++;
1361         i++;
1362         ints &= ~(1 << pirq);
1363
1364         /* Note: for some reason, we get an interrupt with len=1,
1365          * data[0]==0 after each normal ADB interrupt, at least
1366          * on the Pismo. Still investigating...  --BenH
1367          */
1368         if ((1 << pirq) & PMU_INT_ADB) {
1369                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1370                         struct adb_request *req = req_awaiting_reply;
1371                         if (req == 0) {
1372                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1373                                 return;
1374                         }
1375                         req_awaiting_reply = NULL;
1376                         if (len <= 2)
1377                                 req->reply_len = 0;
1378                         else {
1379                                 memcpy(req->reply, data + 1, len - 1);
1380                                 req->reply_len = len - 1;
1381                         }
1382                         pmu_done(req);
1383                 } else {
1384                         if (len == 4 && data[1] == 0x2c) {
1385                                 extern int xmon_wants_key, xmon_adb_keycode;
1386                                 if (xmon_wants_key) {
1387                                         xmon_adb_keycode = data[2];
1388                                         return;
1389                                 }
1390                         }
1391 #ifdef CONFIG_ADB
1392                         /*
1393                          * XXX On the [23]400 the PMU gives us an up
1394                          * event for keycodes 0x74 or 0x75 when the PC
1395                          * card eject buttons are released, so we
1396                          * ignore those events.
1397                          */
1398                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1399                               && data[1] == 0x2c && data[3] == 0xff
1400                               && (data[2] & ~1) == 0xf4))
1401                                 adb_input(data+1, len-1, 1);
1402 #endif /* CONFIG_ADB */
1403                 }
1404         }
1405         /* Sound/brightness button pressed */
1406         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1407 #ifdef CONFIG_PMAC_BACKLIGHT
1408                 if (len == 3)
1409                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1410 #endif
1411         }
1412         /* Tick interrupt */
1413         else if ((1 << pirq) & PMU_INT_TICK) {
1414                 /* Environement or tick interrupt, query batteries */
1415                 if (pmu_battery_count) {
1416                         if ((--query_batt_timer) == 0) {
1417                                 query_battery_state();
1418                                 query_batt_timer = BATTERY_POLLING_COUNT;
1419                         }
1420                 }
1421         }
1422         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1423                 if (pmu_battery_count)
1424                         query_battery_state();
1425                 pmu_pass_intr(data, len);
1426                 /* len == 6 is probably a bad check. But how do I
1427                  * know what PMU versions send what events here? */
1428                 if (len == 6) {
1429                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1430                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1431                 }
1432         } else {
1433                pmu_pass_intr(data, len);
1434         }
1435         goto next;
1436 }
1437
1438 static struct adb_request*
1439 pmu_sr_intr(void)
1440 {
1441         struct adb_request *req;
1442         int bite = 0;
1443
1444         if (via[B] & TREQ) {
1445                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1446                 out_8(&via[IFR], SR_INT);
1447                 return NULL;
1448         }
1449         /* The ack may not yet be low when we get the interrupt */
1450         while ((in_8(&via[B]) & TACK) != 0)
1451                         ;
1452
1453         /* if reading grab the byte, and reset the interrupt */
1454         if (pmu_state == reading || pmu_state == reading_intr)
1455                 bite = in_8(&via[SR]);
1456
1457         /* reset TREQ and wait for TACK to go high */
1458         out_8(&via[B], in_8(&via[B]) | TREQ);
1459         wait_for_ack();
1460
1461         switch (pmu_state) {
1462         case sending:
1463                 req = current_req;
1464                 if (data_len < 0) {
1465                         data_len = req->nbytes - 1;
1466                         send_byte(data_len);
1467                         break;
1468                 }
1469                 if (data_index <= data_len) {
1470                         send_byte(req->data[data_index++]);
1471                         break;
1472                 }
1473                 req->sent = 1;
1474                 data_len = pmu_data_len[req->data[0]][1];
1475                 if (data_len == 0) {
1476                         pmu_state = idle;
1477                         current_req = req->next;
1478                         if (req->reply_expected)
1479                                 req_awaiting_reply = req;
1480                         else
1481                                 return req;
1482                 } else {
1483                         pmu_state = reading;
1484                         data_index = 0;
1485                         reply_ptr = req->reply + req->reply_len;
1486                         recv_byte();
1487                 }
1488                 break;
1489
1490         case intack:
1491                 data_index = 0;
1492                 data_len = -1;
1493                 pmu_state = reading_intr;
1494                 reply_ptr = interrupt_data[int_data_last];
1495                 recv_byte();
1496                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1497                         enable_irq(gpio_irq);
1498                         gpio_irq_enabled = 1;
1499                 }
1500                 break;
1501
1502         case reading:
1503         case reading_intr:
1504                 if (data_len == -1) {
1505                         data_len = bite;
1506                         if (bite > 32)
1507                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1508                 } else if (data_index < 32) {
1509                         reply_ptr[data_index++] = bite;
1510                 }
1511                 if (data_index < data_len) {
1512                         recv_byte();
1513                         break;
1514                 }
1515
1516                 if (pmu_state == reading_intr) {
1517                         pmu_state = idle;
1518                         int_data_state[int_data_last] = int_data_ready;
1519                         interrupt_data_len[int_data_last] = data_len;
1520                 } else {
1521                         req = current_req;
1522                         /*
1523                          * For PMU sleep and freq change requests, we lock the
1524                          * PMU until it's explicitely unlocked. This avoids any
1525                          * spurrious event polling getting in
1526                          */
1527                         current_req = req->next;
1528                         req->reply_len += data_index;
1529                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1530                                 pmu_state = locked;
1531                         else
1532                                 pmu_state = idle;
1533                         return req;
1534                 }
1535                 break;
1536
1537         default:
1538                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1539                        pmu_state);
1540         }
1541         return NULL;
1542 }
1543
1544 static irqreturn_t
1545 via_pmu_interrupt(int irq, void *arg)
1546 {
1547         unsigned long flags;
1548         int intr;
1549         int nloop = 0;
1550         int int_data = -1;
1551         struct adb_request *req = NULL;
1552         int handled = 0;
1553
1554         /* This is a bit brutal, we can probably do better */
1555         spin_lock_irqsave(&pmu_lock, flags);
1556         ++disable_poll;
1557
1558         for (;;) {
1559                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1560                 if (intr == 0)
1561                         break;
1562                 handled = 1;
1563                 if (++nloop > 1000) {
1564                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1565                                "intr=%x, ier=%x pmu_state=%d\n",
1566                                intr, in_8(&via[IER]), pmu_state);
1567                         break;
1568                 }
1569                 out_8(&via[IFR], intr);
1570                 if (intr & CB1_INT) {
1571                         adb_int_pending = 1;
1572                         pmu_irq_stats[0]++;
1573                 }
1574                 if (intr & SR_INT) {
1575                         req = pmu_sr_intr();
1576                         if (req)
1577                                 break;
1578                 }
1579         }
1580
1581 recheck:
1582         if (pmu_state == idle) {
1583                 if (adb_int_pending) {
1584                         if (int_data_state[0] == int_data_empty)
1585                                 int_data_last = 0;
1586                         else if (int_data_state[1] == int_data_empty)
1587                                 int_data_last = 1;
1588                         else
1589                                 goto no_free_slot;
1590                         pmu_state = intack;
1591                         int_data_state[int_data_last] = int_data_fill;
1592                         /* Sounds safer to make sure ACK is high before writing.
1593                          * This helped kill a problem with ADB and some iBooks
1594                          */
1595                         wait_for_ack();
1596                         send_byte(PMU_INT_ACK);
1597                         adb_int_pending = 0;
1598                 } else if (current_req)
1599                         pmu_start();
1600         }
1601 no_free_slot:
1602         /* Mark the oldest buffer for flushing */
1603         if (int_data_state[!int_data_last] == int_data_ready) {
1604                 int_data_state[!int_data_last] = int_data_flush;
1605                 int_data = !int_data_last;
1606         } else if (int_data_state[int_data_last] == int_data_ready) {
1607                 int_data_state[int_data_last] = int_data_flush;
1608                 int_data = int_data_last;
1609         }
1610         --disable_poll;
1611         spin_unlock_irqrestore(&pmu_lock, flags);
1612
1613         /* Deal with completed PMU requests outside of the lock */
1614         if (req) {
1615                 pmu_done(req);
1616                 req = NULL;
1617         }
1618
1619         /* Deal with interrupt datas outside of the lock */
1620         if (int_data >= 0) {
1621                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1622                 spin_lock_irqsave(&pmu_lock, flags);
1623                 ++disable_poll;
1624                 int_data_state[int_data] = int_data_empty;
1625                 int_data = -1;
1626                 goto recheck;
1627         }
1628
1629         return IRQ_RETVAL(handled);
1630 }
1631
1632 void
1633 pmu_unlock(void)
1634 {
1635         unsigned long flags;
1636
1637         spin_lock_irqsave(&pmu_lock, flags);
1638         if (pmu_state == locked)
1639                 pmu_state = idle;
1640         adb_int_pending = 1;
1641         spin_unlock_irqrestore(&pmu_lock, flags);
1642 }
1643
1644
1645 static irqreturn_t
1646 gpio1_interrupt(int irq, void *arg)
1647 {
1648         unsigned long flags;
1649
1650         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1651                 spin_lock_irqsave(&pmu_lock, flags);
1652                 if (gpio_irq_enabled > 0) {
1653                         disable_irq_nosync(gpio_irq);
1654                         gpio_irq_enabled = 0;
1655                 }
1656                 pmu_irq_stats[1]++;
1657                 adb_int_pending = 1;
1658                 spin_unlock_irqrestore(&pmu_lock, flags);
1659                 via_pmu_interrupt(0, NULL);
1660                 return IRQ_HANDLED;
1661         }
1662         return IRQ_NONE;
1663 }
1664
1665 void
1666 pmu_enable_irled(int on)
1667 {
1668         struct adb_request req;
1669
1670         if (vias == NULL)
1671                 return ;
1672         if (pmu_kind == PMU_KEYLARGO_BASED)
1673                 return ;
1674
1675         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1676             (on ? PMU_POW_ON : PMU_POW_OFF));
1677         pmu_wait_complete(&req);
1678 }
1679
1680 void
1681 pmu_restart(void)
1682 {
1683         struct adb_request req;
1684
1685         if (via == NULL)
1686                 return;
1687
1688         local_irq_disable();
1689
1690         drop_interrupts = 1;
1691
1692         if (pmu_kind != PMU_KEYLARGO_BASED) {
1693                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1694                                                 PMU_INT_TICK );
1695                 while(!req.complete)
1696                         pmu_poll();
1697         }
1698
1699         pmu_request(&req, NULL, 1, PMU_RESET);
1700         pmu_wait_complete(&req);
1701         for (;;)
1702                 ;
1703 }
1704
1705 void
1706 pmu_shutdown(void)
1707 {
1708         struct adb_request req;
1709
1710         if (via == NULL)
1711                 return;
1712
1713         local_irq_disable();
1714
1715         drop_interrupts = 1;
1716
1717         if (pmu_kind != PMU_KEYLARGO_BASED) {
1718                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1719                                                 PMU_INT_TICK );
1720                 pmu_wait_complete(&req);
1721         } else {
1722                 /* Disable server mode on shutdown or we'll just
1723                  * wake up again
1724                  */
1725                 pmu_set_server_mode(0);
1726         }
1727
1728         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1729                     'M', 'A', 'T', 'T');
1730         pmu_wait_complete(&req);
1731         for (;;)
1732                 ;
1733 }
1734
1735 int
1736 pmu_present(void)
1737 {
1738         return via != 0;
1739 }
1740
1741 #ifdef CONFIG_PM
1742
1743 static LIST_HEAD(sleep_notifiers);
1744
1745 int
1746 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
1747 {
1748         struct list_head *list;
1749         struct pmu_sleep_notifier *notifier;
1750
1751         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1752              list = list->next) {
1753                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1754                 if (n->priority > notifier->priority)
1755                         break;
1756         }
1757         __list_add(&n->list, list->prev, list);
1758         return 0;
1759 }
1760 EXPORT_SYMBOL(pmu_register_sleep_notifier);
1761
1762 int
1763 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
1764 {
1765         if (n->list.next == 0)
1766                 return -ENOENT;
1767         list_del(&n->list);
1768         n->list.next = NULL;
1769         return 0;
1770 }
1771 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
1772 #endif /* CONFIG_PM */
1773
1774 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1775
1776 /* Sleep is broadcast last-to-first */
1777 static void broadcast_sleep(int when)
1778 {
1779         struct list_head *list;
1780         struct pmu_sleep_notifier *notifier;
1781
1782         for (list = sleep_notifiers.prev; list != &sleep_notifiers;
1783              list = list->prev) {
1784                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1785                 notifier->notifier_call(notifier, when);
1786         }
1787 }
1788
1789 /* Wake is broadcast first-to-last */
1790 static void broadcast_wake(void)
1791 {
1792         struct list_head *list;
1793         struct pmu_sleep_notifier *notifier;
1794
1795         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1796              list = list->next) {
1797                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1798                 notifier->notifier_call(notifier, PBOOK_WAKE);
1799         }
1800 }
1801
1802 /*
1803  * This struct is used to store config register values for
1804  * PCI devices which may get powered off when we sleep.
1805  */
1806 static struct pci_save {
1807 #ifndef HACKED_PCI_SAVE
1808         u16     command;
1809         u16     cache_lat;
1810         u16     intr;
1811         u32     rom_address;
1812 #else
1813         u32     config[16];
1814 #endif
1815 } *pbook_pci_saves;
1816 static int pbook_npci_saves;
1817
1818 static void
1819 pbook_alloc_pci_save(void)
1820 {
1821         int npci;
1822         struct pci_dev *pd = NULL;
1823
1824         npci = 0;
1825         while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1826                 ++npci;
1827         }
1828         if (npci == 0)
1829                 return;
1830         pbook_pci_saves = (struct pci_save *)
1831                 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
1832         pbook_npci_saves = npci;
1833 }
1834
1835 static void
1836 pbook_free_pci_save(void)
1837 {
1838         if (pbook_pci_saves == NULL)
1839                 return;
1840         kfree(pbook_pci_saves);
1841         pbook_pci_saves = NULL;
1842         pbook_npci_saves = 0;
1843 }
1844
1845 static void
1846 pbook_pci_save(void)
1847 {
1848         struct pci_save *ps = pbook_pci_saves;
1849         struct pci_dev *pd = NULL;
1850         int npci = pbook_npci_saves;
1851
1852         if (ps == NULL)
1853                 return;
1854
1855         while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1856                 if (npci-- == 0) {
1857                         pci_dev_put(pd);
1858                         return;
1859                 }
1860 #ifndef HACKED_PCI_SAVE
1861                 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
1862                 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
1863                 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
1864                 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
1865 #else
1866                 int i;
1867                 for (i=1;i<16;i++)
1868                         pci_read_config_dword(pd, i<<4, &ps->config[i]);
1869 #endif
1870                 ++ps;
1871         }
1872 }
1873
1874 /* For this to work, we must take care of a few things: If gmac was enabled
1875  * during boot, it will be in the pci dev list. If it's disabled at this point
1876  * (and it will probably be), then you can't access it's config space.
1877  */
1878 static void
1879 pbook_pci_restore(void)
1880 {
1881         u16 cmd;
1882         struct pci_save *ps = pbook_pci_saves - 1;
1883         struct pci_dev *pd = NULL;
1884         int npci = pbook_npci_saves;
1885         int j;
1886
1887         while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1888 #ifdef HACKED_PCI_SAVE
1889                 int i;
1890                 if (npci-- == 0) {
1891                         pci_dev_put(pd);
1892                         return;
1893                 }
1894                 ps++;
1895                 for (i=2;i<16;i++)
1896                         pci_write_config_dword(pd, i<<4, ps->config[i]);
1897                 pci_write_config_dword(pd, 4, ps->config[1]);
1898 #else
1899                 if (npci-- == 0)
1900                         return;
1901                 ps++;
1902                 if (ps->command == 0)
1903                         continue;
1904                 pci_read_config_word(pd, PCI_COMMAND, &cmd);
1905                 if ((ps->command & ~cmd) == 0)
1906                         continue;
1907                 switch (pd->hdr_type) {
1908                 case PCI_HEADER_TYPE_NORMAL:
1909                         for (j = 0; j < 6; ++j)
1910                                 pci_write_config_dword(pd,
1911                                         PCI_BASE_ADDRESS_0 + j*4,
1912                                         pd->resource[j].start);
1913                         pci_write_config_dword(pd, PCI_ROM_ADDRESS,
1914                                 ps->rom_address);
1915                         pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
1916                                 ps->cache_lat);
1917                         pci_write_config_word(pd, PCI_INTERRUPT_LINE,
1918                                 ps->intr);
1919                         pci_write_config_word(pd, PCI_COMMAND, ps->command);
1920                         break;
1921                 }
1922 #endif
1923         }
1924 }
1925
1926 #ifdef DEBUG_SLEEP
1927 /* N.B. This doesn't work on the 3400 */
1928 void
1929 pmu_blink(int n)
1930 {
1931         struct adb_request req;
1932
1933         memset(&req, 0, sizeof(req));
1934
1935         for (; n > 0; --n) {
1936                 req.nbytes = 4;
1937                 req.done = NULL;
1938                 req.data[0] = 0xee;
1939                 req.data[1] = 4;
1940                 req.data[2] = 0;
1941                 req.data[3] = 1;
1942                 req.reply[0] = ADB_RET_OK;
1943                 req.reply_len = 1;
1944                 req.reply_expected = 0;
1945                 pmu_polled_request(&req);
1946                 mdelay(50);
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] = 0;
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         }
1959         mdelay(50);
1960 }
1961 #endif
1962
1963 /*
1964  * Put the powerbook to sleep.
1965  */
1966
1967 static u32 save_via[8];
1968
1969 static void
1970 save_via_state(void)
1971 {
1972         save_via[0] = in_8(&via[ANH]);
1973         save_via[1] = in_8(&via[DIRA]);
1974         save_via[2] = in_8(&via[B]);
1975         save_via[3] = in_8(&via[DIRB]);
1976         save_via[4] = in_8(&via[PCR]);
1977         save_via[5] = in_8(&via[ACR]);
1978         save_via[6] = in_8(&via[T1CL]);
1979         save_via[7] = in_8(&via[T1CH]);
1980 }
1981 static void
1982 restore_via_state(void)
1983 {
1984         out_8(&via[ANH], save_via[0]);
1985         out_8(&via[DIRA], save_via[1]);
1986         out_8(&via[B], save_via[2]);
1987         out_8(&via[DIRB], save_via[3]);
1988         out_8(&via[PCR], save_via[4]);
1989         out_8(&via[ACR], save_via[5]);
1990         out_8(&via[T1CL], save_via[6]);
1991         out_8(&via[T1CH], save_via[7]);
1992         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
1993         out_8(&via[IFR], 0x7f);                         /* clear IFR */
1994         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1995 }
1996
1997 extern void pmu_backlight_set_sleep(int sleep);
1998
1999 static int
2000 pmac_suspend_devices(void)
2001 {
2002         int ret;
2003
2004         pm_prepare_console();
2005
2006         /* Notify old-style device drivers */
2007         broadcast_sleep(PBOOK_SLEEP_REQUEST);
2008
2009         /* Sync the disks. */
2010         /* XXX It would be nice to have some way to ensure that
2011          * nobody is dirtying any new buffers while we wait. That
2012          * could be achieved using the refrigerator for processes
2013          * that swsusp uses
2014          */
2015         sys_sync();
2016
2017         broadcast_sleep(PBOOK_SLEEP_NOW);
2018
2019         /* Send suspend call to devices, hold the device core's dpm_sem */
2020         ret = device_suspend(PMSG_SUSPEND);
2021         if (ret) {
2022                 broadcast_wake();
2023                 printk(KERN_ERR "Driver sleep failed\n");
2024                 return -EBUSY;
2025         }
2026
2027 #ifdef CONFIG_PMAC_BACKLIGHT
2028         /* Tell backlight code not to muck around with the chip anymore */
2029         pmu_backlight_set_sleep(1);
2030 #endif
2031
2032         /* Call platform functions marked "on sleep" */
2033         pmac_pfunc_i2c_suspend();
2034         pmac_pfunc_base_suspend();
2035
2036         /* Stop preemption */
2037         preempt_disable();
2038
2039         /* Make sure the decrementer won't interrupt us */
2040         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2041         /* Make sure any pending DEC interrupt occurring while we did
2042          * the above didn't re-enable the DEC */
2043         mb();
2044         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2045
2046         /* We can now disable MSR_EE. This code of course works properly only
2047          * on UP machines... For SMP, if we ever implement sleep, we'll have to
2048          * stop the "other" CPUs way before we do all that stuff.
2049          */
2050         local_irq_disable();
2051
2052         /* Broadcast power down irq
2053          * This isn't that useful in most cases (only directly wired devices can
2054          * use this but still... This will take care of sysdev's as well, so
2055          * we exit from here with local irqs disabled and PIC off.
2056          */
2057         ret = device_power_down(PMSG_SUSPEND);
2058         if (ret) {
2059                 wakeup_decrementer();
2060                 local_irq_enable();
2061                 preempt_enable();
2062                 device_resume();
2063                 broadcast_wake();
2064                 printk(KERN_ERR "Driver powerdown failed\n");
2065                 return -EBUSY;
2066         }
2067
2068         /* Wait for completion of async requests */
2069         while (!batt_req.complete)
2070                 pmu_poll();
2071
2072         /* Giveup the lazy FPU & vec so we don't have to back them
2073          * up from the low level code
2074          */
2075         enable_kernel_fp();
2076
2077 #ifdef CONFIG_ALTIVEC
2078         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2079                 enable_kernel_altivec();
2080 #endif /* CONFIG_ALTIVEC */
2081
2082         return 0;
2083 }
2084
2085 static int
2086 pmac_wakeup_devices(void)
2087 {
2088         mdelay(100);
2089
2090 #ifdef CONFIG_PMAC_BACKLIGHT
2091         /* Tell backlight code it can use the chip again */
2092         pmu_backlight_set_sleep(0);
2093 #endif
2094
2095         /* Power back up system devices (including the PIC) */
2096         device_power_up();
2097
2098         /* Force a poll of ADB interrupts */
2099         adb_int_pending = 1;
2100         via_pmu_interrupt(0, NULL);
2101
2102         /* Restart jiffies & scheduling */
2103         wakeup_decrementer();
2104
2105         /* Re-enable local CPU interrupts */
2106         local_irq_enable();
2107         mdelay(10);
2108         preempt_enable();
2109
2110         /* Call platform functions marked "on wake" */
2111         pmac_pfunc_base_resume();
2112         pmac_pfunc_i2c_resume();
2113
2114         /* Resume devices */
2115         device_resume();
2116
2117         /* Notify old style drivers */
2118         broadcast_wake();
2119
2120         pm_restore_console();
2121
2122         return 0;
2123 }
2124
2125 #define GRACKLE_PM      (1<<7)
2126 #define GRACKLE_DOZE    (1<<5)
2127 #define GRACKLE_NAP     (1<<4)
2128 #define GRACKLE_SLEEP   (1<<3)
2129
2130 static int powerbook_sleep_grackle(void)
2131 {
2132         unsigned long save_l2cr;
2133         unsigned short pmcr1;
2134         struct adb_request req;
2135         int ret;
2136         struct pci_dev *grackle;
2137
2138         grackle = pci_get_bus_and_slot(0, 0);
2139         if (!grackle)
2140                 return -ENODEV;
2141
2142         ret = pmac_suspend_devices();
2143         if (ret) {
2144                 printk(KERN_ERR "Sleep rejected by devices\n");
2145                 return ret;
2146         }
2147
2148         /* Turn off various things. Darwin does some retry tests here... */
2149         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2150         pmu_wait_complete(&req);
2151         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2152                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2153         pmu_wait_complete(&req);
2154
2155         /* For 750, save backside cache setting and disable it */
2156         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2157
2158         if (!__fake_sleep) {
2159                 /* Ask the PMU to put us to sleep */
2160                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2161                 pmu_wait_complete(&req);
2162         }
2163
2164         /* The VIA is supposed not to be restored correctly*/
2165         save_via_state();
2166         /* We shut down some HW */
2167         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2168
2169         pci_read_config_word(grackle, 0x70, &pmcr1);
2170         /* Apparently, MacOS uses NAP mode for Grackle ??? */
2171         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2172         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2173         pci_write_config_word(grackle, 0x70, pmcr1);
2174
2175         /* Call low-level ASM sleep handler */
2176         if (__fake_sleep)
2177                 mdelay(5000);
2178         else
2179                 low_sleep_handler();
2180
2181         /* We're awake again, stop grackle PM */
2182         pci_read_config_word(grackle, 0x70, &pmcr1);
2183         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2184         pci_write_config_word(grackle, 0x70, pmcr1);
2185
2186         pci_dev_put(grackle);
2187
2188         /* Make sure the PMU is idle */
2189         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2190         restore_via_state();
2191
2192         /* Restore L2 cache */
2193         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2194                 _set_L2CR(save_l2cr);
2195
2196         /* Restore userland MMU context */
2197         set_context(current->active_mm->context.id, current->active_mm->pgd);
2198
2199         /* Power things up */
2200         pmu_unlock();
2201         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2202         pmu_wait_complete(&req);
2203         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2204                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2205         pmu_wait_complete(&req);
2206         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2207                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2208         pmu_wait_complete(&req);
2209
2210         pmac_wakeup_devices();
2211
2212         return 0;
2213 }
2214
2215 static int
2216 powerbook_sleep_Core99(void)
2217 {
2218         unsigned long save_l2cr;
2219         unsigned long save_l3cr;
2220         struct adb_request req;
2221         int ret;
2222
2223         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2224                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2225                 return -ENOSYS;
2226         }
2227
2228         if (num_online_cpus() > 1 || cpu_is_offline(0))
2229                 return -EAGAIN;
2230
2231         ret = pmac_suspend_devices();
2232         if (ret) {
2233                 printk(KERN_ERR "Sleep rejected by devices\n");
2234                 return ret;
2235         }
2236
2237         /* Stop environment and ADB interrupts */
2238         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2239         pmu_wait_complete(&req);
2240
2241         /* Tell PMU what events will wake us up */
2242         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2243                 0xff, 0xff);
2244         pmu_wait_complete(&req);
2245         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2246                 0, PMU_PWR_WAKEUP_KEY |
2247                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2248         pmu_wait_complete(&req);
2249
2250         /* Save the state of the L2 and L3 caches */
2251         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
2252         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2253
2254         if (!__fake_sleep) {
2255                 /* Ask the PMU to put us to sleep */
2256                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2257                 pmu_wait_complete(&req);
2258         }
2259
2260         /* The VIA is supposed not to be restored correctly*/
2261         save_via_state();
2262
2263         /* Shut down various ASICs. There's a chance that we can no longer
2264          * talk to the PMU after this, so I moved it to _after_ sending the
2265          * sleep command to it. Still need to be checked.
2266          */
2267         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2268
2269         /* Call low-level ASM sleep handler */
2270         if (__fake_sleep)
2271                 mdelay(5000);
2272         else
2273                 low_sleep_handler();
2274
2275         /* Restore Apple core ASICs state */
2276         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2277
2278         /* Restore VIA */
2279         restore_via_state();
2280
2281         /* tweak LPJ before cpufreq is there */
2282         loops_per_jiffy *= 2;
2283
2284         /* Restore video */
2285         pmac_call_early_video_resume();
2286
2287         /* Restore L2 cache */
2288         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2289                 _set_L2CR(save_l2cr);
2290         /* Restore L3 cache */
2291         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2292                 _set_L3CR(save_l3cr);
2293
2294         /* Restore userland MMU context */
2295         set_context(current->active_mm->context.id, current->active_mm->pgd);
2296
2297         /* Tell PMU we are ready */
2298         pmu_unlock();
2299         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2300         pmu_wait_complete(&req);
2301         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2302         pmu_wait_complete(&req);
2303
2304         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2305         loops_per_jiffy /= 2;
2306
2307         pmac_wakeup_devices();
2308
2309         return 0;
2310 }
2311
2312 #define PB3400_MEM_CTRL         0xf8000000
2313 #define PB3400_MEM_CTRL_SLEEP   0x70
2314
2315 static int
2316 powerbook_sleep_3400(void)
2317 {
2318         int ret, i, x;
2319         unsigned int hid0;
2320         unsigned long p;
2321         struct adb_request sleep_req;
2322         void __iomem *mem_ctrl;
2323         unsigned int __iomem *mem_ctrl_sleep;
2324
2325         /* first map in the memory controller registers */
2326         mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2327         if (mem_ctrl == NULL) {
2328                 printk("powerbook_sleep_3400: ioremap failed\n");
2329                 return -ENOMEM;
2330         }
2331         mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2332
2333         /* Allocate room for PCI save */
2334         pbook_alloc_pci_save();
2335
2336         ret = pmac_suspend_devices();
2337         if (ret) {
2338                 pbook_free_pci_save();
2339                 printk(KERN_ERR "Sleep rejected by devices\n");
2340                 return ret;
2341         }
2342
2343         /* Save the state of PCI config space for some slots */
2344         pbook_pci_save();
2345
2346         /* Set the memory controller to keep the memory refreshed
2347            while we're asleep */
2348         for (i = 0x403f; i >= 0x4000; --i) {
2349                 out_be32(mem_ctrl_sleep, i);
2350                 do {
2351                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2352                 } while (x == 0);
2353                 if (x >= 0x100)
2354                         break;
2355         }
2356
2357         /* Ask the PMU to put us to sleep */
2358         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2359         while (!sleep_req.complete)
2360                 mb();
2361
2362         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2363
2364         /* displacement-flush the L2 cache - necessary? */
2365         for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2366                 i = *(volatile int *)p;
2367         asleep = 1;
2368
2369         /* Put the CPU into sleep mode */
2370         hid0 = mfspr(SPRN_HID0);
2371         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2372         mtspr(SPRN_HID0, hid0);
2373         mtmsr(mfmsr() | MSR_POW | MSR_EE);
2374         udelay(10);
2375
2376         /* OK, we're awake again, start restoring things */
2377         out_be32(mem_ctrl_sleep, 0x3f);
2378         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2379         pbook_pci_restore();
2380         pmu_unlock();
2381
2382         /* wait for the PMU interrupt sequence to complete */
2383         while (asleep)
2384                 mb();
2385
2386         pmac_wakeup_devices();
2387         pbook_free_pci_save();
2388         iounmap(mem_ctrl);
2389
2390         return 0;
2391 }
2392
2393 #endif /* CONFIG_PM && CONFIG_PPC32 */
2394
2395 /*
2396  * Support for /dev/pmu device
2397  */
2398 #define RB_SIZE         0x10
2399 struct pmu_private {
2400         struct list_head list;
2401         int     rb_get;
2402         int     rb_put;
2403         struct rb_entry {
2404                 unsigned short len;
2405                 unsigned char data[16];
2406         }       rb_buf[RB_SIZE];
2407         wait_queue_head_t wait;
2408         spinlock_t lock;
2409 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2410         int     backlight_locker;
2411 #endif
2412 };
2413
2414 static LIST_HEAD(all_pmu_pvt);
2415 static DEFINE_SPINLOCK(all_pvt_lock);
2416
2417 static void
2418 pmu_pass_intr(unsigned char *data, int len)
2419 {
2420         struct pmu_private *pp;
2421         struct list_head *list;
2422         int i;
2423         unsigned long flags;
2424
2425         if (len > sizeof(pp->rb_buf[0].data))
2426                 len = sizeof(pp->rb_buf[0].data);
2427         spin_lock_irqsave(&all_pvt_lock, flags);
2428         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2429                 pp = list_entry(list, struct pmu_private, list);
2430                 spin_lock(&pp->lock);
2431                 i = pp->rb_put + 1;
2432                 if (i >= RB_SIZE)
2433                         i = 0;
2434                 if (i != pp->rb_get) {
2435                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2436                         rp->len = len;
2437                         memcpy(rp->data, data, len);
2438                         pp->rb_put = i;
2439                         wake_up_interruptible(&pp->wait);
2440                 }
2441                 spin_unlock(&pp->lock);
2442         }
2443         spin_unlock_irqrestore(&all_pvt_lock, flags);
2444 }
2445
2446 static int
2447 pmu_open(struct inode *inode, struct file *file)
2448 {
2449         struct pmu_private *pp;
2450         unsigned long flags;
2451
2452         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2453         if (pp == 0)
2454                 return -ENOMEM;
2455         pp->rb_get = pp->rb_put = 0;
2456         spin_lock_init(&pp->lock);
2457         init_waitqueue_head(&pp->wait);
2458         spin_lock_irqsave(&all_pvt_lock, flags);
2459 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2460         pp->backlight_locker = 0;
2461 #endif
2462         list_add(&pp->list, &all_pmu_pvt);
2463         spin_unlock_irqrestore(&all_pvt_lock, flags);
2464         file->private_data = pp;
2465         return 0;
2466 }
2467
2468 static ssize_t
2469 pmu_read(struct file *file, char __user *buf,
2470                         size_t count, loff_t *ppos)
2471 {
2472         struct pmu_private *pp = file->private_data;
2473         DECLARE_WAITQUEUE(wait, current);
2474         unsigned long flags;
2475         int ret = 0;
2476
2477         if (count < 1 || pp == 0)
2478                 return -EINVAL;
2479         if (!access_ok(VERIFY_WRITE, buf, count))
2480                 return -EFAULT;
2481
2482         spin_lock_irqsave(&pp->lock, flags);
2483         add_wait_queue(&pp->wait, &wait);
2484         current->state = TASK_INTERRUPTIBLE;
2485
2486         for (;;) {
2487                 ret = -EAGAIN;
2488                 if (pp->rb_get != pp->rb_put) {
2489                         int i = pp->rb_get;
2490                         struct rb_entry *rp = &pp->rb_buf[i];
2491                         ret = rp->len;
2492                         spin_unlock_irqrestore(&pp->lock, flags);
2493                         if (ret > count)
2494                                 ret = count;
2495                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2496                                 ret = -EFAULT;
2497                         if (++i >= RB_SIZE)
2498                                 i = 0;
2499                         spin_lock_irqsave(&pp->lock, flags);
2500                         pp->rb_get = i;
2501                 }
2502                 if (ret >= 0)
2503                         break;
2504                 if (file->f_flags & O_NONBLOCK)
2505                         break;
2506                 ret = -ERESTARTSYS;
2507                 if (signal_pending(current))
2508                         break;
2509                 spin_unlock_irqrestore(&pp->lock, flags);
2510                 schedule();
2511                 spin_lock_irqsave(&pp->lock, flags);
2512         }
2513         current->state = TASK_RUNNING;
2514         remove_wait_queue(&pp->wait, &wait);
2515         spin_unlock_irqrestore(&pp->lock, flags);
2516
2517         return ret;
2518 }
2519
2520 static ssize_t
2521 pmu_write(struct file *file, const char __user *buf,
2522                          size_t count, loff_t *ppos)
2523 {
2524         return 0;
2525 }
2526
2527 static unsigned int
2528 pmu_fpoll(struct file *filp, poll_table *wait)
2529 {
2530         struct pmu_private *pp = filp->private_data;
2531         unsigned int mask = 0;
2532         unsigned long flags;
2533
2534         if (pp == 0)
2535                 return 0;
2536         poll_wait(filp, &pp->wait, wait);
2537         spin_lock_irqsave(&pp->lock, flags);
2538         if (pp->rb_get != pp->rb_put)
2539                 mask |= POLLIN;
2540         spin_unlock_irqrestore(&pp->lock, flags);
2541         return mask;
2542 }
2543
2544 static int
2545 pmu_release(struct inode *inode, struct file *file)
2546 {
2547         struct pmu_private *pp = file->private_data;
2548         unsigned long flags;
2549
2550         lock_kernel();
2551         if (pp != 0) {
2552                 file->private_data = NULL;
2553                 spin_lock_irqsave(&all_pvt_lock, flags);
2554                 list_del(&pp->list);
2555                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2556
2557 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2558                 if (pp->backlight_locker)
2559                         pmac_backlight_enable();
2560 #endif
2561
2562                 kfree(pp);
2563         }
2564         unlock_kernel();
2565         return 0;
2566 }
2567
2568 static int
2569 pmu_ioctl(struct inode * inode, struct file *filp,
2570                      u_int cmd, u_long arg)
2571 {
2572         __u32 __user *argp = (__u32 __user *)arg;
2573         int error = -EINVAL;
2574
2575         switch (cmd) {
2576 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2577         case PMU_IOC_SLEEP:
2578                 if (!capable(CAP_SYS_ADMIN))
2579                         return -EACCES;
2580                 if (sleep_in_progress)
2581                         return -EBUSY;
2582                 sleep_in_progress = 1;
2583                 switch (pmu_kind) {
2584                 case PMU_OHARE_BASED:
2585                         error = powerbook_sleep_3400();
2586                         break;
2587                 case PMU_HEATHROW_BASED:
2588                 case PMU_PADDINGTON_BASED:
2589                         error = powerbook_sleep_grackle();
2590                         break;
2591                 case PMU_KEYLARGO_BASED:
2592                         error = powerbook_sleep_Core99();
2593                         break;
2594                 default:
2595                         error = -ENOSYS;
2596                 }
2597                 sleep_in_progress = 0;
2598                 break;
2599         case PMU_IOC_CAN_SLEEP:
2600                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2601                         return put_user(0, argp);
2602                 else
2603                         return put_user(1, argp);
2604 #endif /* CONFIG_PM && CONFIG_PPC32 */
2605
2606 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2607         /* Compatibility ioctl's for backlight */
2608         case PMU_IOC_GET_BACKLIGHT:
2609         {
2610                 int brightness;
2611
2612                 if (sleep_in_progress)
2613                         return -EBUSY;
2614
2615                 brightness = pmac_backlight_get_legacy_brightness();
2616                 if (brightness < 0)
2617                         return brightness;
2618                 else
2619                         return put_user(brightness, argp);
2620
2621         }
2622         case PMU_IOC_SET_BACKLIGHT:
2623         {
2624                 int brightness;
2625
2626                 if (sleep_in_progress)
2627                         return -EBUSY;
2628
2629                 error = get_user(brightness, argp);
2630                 if (error)
2631                         return error;
2632
2633                 return pmac_backlight_set_legacy_brightness(brightness);
2634         }
2635 #ifdef CONFIG_INPUT_ADBHID
2636         case PMU_IOC_GRAB_BACKLIGHT: {
2637                 struct pmu_private *pp = filp->private_data;
2638
2639                 if (pp->backlight_locker)
2640                         return 0;
2641
2642                 pp->backlight_locker = 1;
2643                 pmac_backlight_disable();
2644
2645                 return 0;
2646         }
2647 #endif /* CONFIG_INPUT_ADBHID */
2648 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2649
2650         case PMU_IOC_GET_MODEL:
2651                 return put_user(pmu_kind, argp);
2652         case PMU_IOC_HAS_ADB:
2653                 return put_user(pmu_has_adb, argp);
2654         }
2655         return error;
2656 }
2657
2658 static const struct file_operations pmu_device_fops = {
2659         .read           = pmu_read,
2660         .write          = pmu_write,
2661         .poll           = pmu_fpoll,
2662         .ioctl          = pmu_ioctl,
2663         .open           = pmu_open,
2664         .release        = pmu_release,
2665 };
2666
2667 static struct miscdevice pmu_device = {
2668         PMU_MINOR, "pmu", &pmu_device_fops
2669 };
2670
2671 static int pmu_device_init(void)
2672 {
2673         if (!via)
2674                 return 0;
2675         if (misc_register(&pmu_device) < 0)
2676                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2677         return 0;
2678 }
2679 device_initcall(pmu_device_init);
2680
2681
2682 #ifdef DEBUG_SLEEP
2683 static inline void
2684 polled_handshake(volatile unsigned char __iomem *via)
2685 {
2686         via[B] &= ~TREQ; eieio();
2687         while ((via[B] & TACK) != 0)
2688                 ;
2689         via[B] |= TREQ; eieio();
2690         while ((via[B] & TACK) == 0)
2691                 ;
2692 }
2693
2694 static inline void
2695 polled_send_byte(volatile unsigned char __iomem *via, int x)
2696 {
2697         via[ACR] |= SR_OUT | SR_EXT; eieio();
2698         via[SR] = x; eieio();
2699         polled_handshake(via);
2700 }
2701
2702 static inline int
2703 polled_recv_byte(volatile unsigned char __iomem *via)
2704 {
2705         int x;
2706
2707         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2708         x = via[SR]; eieio();
2709         polled_handshake(via);
2710         x = via[SR]; eieio();
2711         return x;
2712 }
2713
2714 int
2715 pmu_polled_request(struct adb_request *req)
2716 {
2717         unsigned long flags;
2718         int i, l, c;
2719         volatile unsigned char __iomem *v = via;
2720
2721         req->complete = 1;
2722         c = req->data[0];
2723         l = pmu_data_len[c][0];
2724         if (l >= 0 && req->nbytes != l + 1)
2725                 return -EINVAL;
2726
2727         local_irq_save(flags);
2728         while (pmu_state != idle)
2729                 pmu_poll();
2730
2731         while ((via[B] & TACK) == 0)
2732                 ;
2733         polled_send_byte(v, c);
2734         if (l < 0) {
2735                 l = req->nbytes - 1;
2736                 polled_send_byte(v, l);
2737         }
2738         for (i = 1; i <= l; ++i)
2739                 polled_send_byte(v, req->data[i]);
2740
2741         l = pmu_data_len[c][1];
2742         if (l < 0)
2743                 l = polled_recv_byte(v);
2744         for (i = 0; i < l; ++i)
2745                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2746
2747         if (req->done)
2748                 (*req->done)(req);
2749
2750         local_irq_restore(flags);
2751         return 0;
2752 }
2753 #endif /* DEBUG_SLEEP */
2754
2755
2756 /* FIXME: This is a temporary set of callbacks to enable us
2757  * to do suspend-to-disk.
2758  */
2759
2760 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2761
2762 int pmu_sys_suspended;
2763
2764 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2765 {
2766         if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2767                 return 0;
2768
2769         /* Suspend PMU event interrupts */
2770         pmu_suspend();
2771
2772         pmu_sys_suspended = 1;
2773         return 0;
2774 }
2775
2776 static int pmu_sys_resume(struct sys_device *sysdev)
2777 {
2778         struct adb_request req;
2779
2780         if (!pmu_sys_suspended)
2781                 return 0;
2782
2783         /* Tell PMU we are ready */
2784         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2785         pmu_wait_complete(&req);
2786
2787         /* Resume PMU event interrupts */
2788         pmu_resume();
2789
2790         pmu_sys_suspended = 0;
2791
2792         return 0;
2793 }
2794
2795 #endif /* CONFIG_PM && CONFIG_PPC32 */
2796
2797 static struct sysdev_class pmu_sysclass = {
2798         set_kset_name("pmu"),
2799 };
2800
2801 static struct sys_device device_pmu = {
2802         .cls            = &pmu_sysclass,
2803 };
2804
2805 static struct sysdev_driver driver_pmu = {
2806 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2807         .suspend        = &pmu_sys_suspend,
2808         .resume         = &pmu_sys_resume,
2809 #endif /* CONFIG_PM && CONFIG_PPC32 */
2810 };
2811
2812 static int __init init_pmu_sysfs(void)
2813 {
2814         int rc;
2815
2816         rc = sysdev_class_register(&pmu_sysclass);
2817         if (rc) {
2818                 printk(KERN_ERR "Failed registering PMU sys class\n");
2819                 return -ENODEV;
2820         }
2821         rc = sysdev_register(&device_pmu);
2822         if (rc) {
2823                 printk(KERN_ERR "Failed registering PMU sys device\n");
2824                 return -ENODEV;
2825         }
2826         rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2827         if (rc) {
2828                 printk(KERN_ERR "Failed registering PMU sys driver\n");
2829                 return -ENODEV;
2830         }
2831         return 0;
2832 }
2833
2834 subsys_initcall(init_pmu_sysfs);
2835
2836 EXPORT_SYMBOL(pmu_request);
2837 EXPORT_SYMBOL(pmu_queue_request);
2838 EXPORT_SYMBOL(pmu_poll);
2839 EXPORT_SYMBOL(pmu_poll_adb);
2840 EXPORT_SYMBOL(pmu_wait_complete);
2841 EXPORT_SYMBOL(pmu_suspend);
2842 EXPORT_SYMBOL(pmu_resume);
2843 EXPORT_SYMBOL(pmu_unlock);
2844 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2845 EXPORT_SYMBOL(pmu_enable_irled);
2846 EXPORT_SYMBOL(pmu_battery_count);
2847 EXPORT_SYMBOL(pmu_batteries);
2848 EXPORT_SYMBOL(pmu_power_flags);
2849 #endif /* CONFIG_PM && CONFIG_PPC32 */
2850