drivers/macintosh/via-pmu.c

   1 /*
   2  * Device driver for the via-pmu on Apple Powermacs.
   3  *
   4  * The VIA (versatile interface adapter) interfaces to the PMU,
   5  * a 6805 microprocessor core whose primary function is to control
   6  * battery charging and system power on the PowerBook 3400 and 2400.
   7  * The PMU also controls the ADB (Apple Desktop Bus) which connects
   8  * to the keyboard and mouse, as well as the non-volatile RAM
   9  * and the RTC (real time clock) chip.
  10  *
  11  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
  12  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
  13  *
  14  * THIS DRIVER IS BECOMING A TOTAL MESS !
  15  *  - Cleanup atomically disabling reply to PMU events after
  16  *    a sleep or a freq. switch
  17  *  - Move sleep code out of here to pmac_pm, merge into new
  18  *    common PM infrastructure
  19  *  - Move backlight code out as well
  20  *  - Save/Restore PCI space properly
  21  *
  22  */
  23 #include <stdarg.h>
  24 #include <linux/config.h>
  25 #include <linux/types.h>
  26 #include <linux/errno.h>
  27 #include <linux/kernel.h>
  28 #include <linux/delay.h>
  29 #include <linux/sched.h>
  30 #include <linux/miscdevice.h>
  31 #include <linux/blkdev.h>
  32 #include <linux/pci.h>
  33 #include <linux/slab.h>
  34 #include <linux/poll.h>
  35 #include <linux/adb.h>
  36 #include <linux/pmu.h>
  37 #include <linux/cuda.h>
  38 #include <linux/smp_lock.h>
  39 #include <linux/module.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/pm.h>
  42 #include <linux/proc_fs.h>
  43 #include <linux/init.h>
  44 #include <linux/interrupt.h>
  45 #include <linux/device.h>
  46 #include <linux/sysdev.h>
  47 #include <linux/suspend.h>
  48 #include <linux/syscalls.h>
  49 #include <linux/cpu.h>
  50 #include <asm/prom.h>
  51 #include <asm/machdep.h>
  52 #include <asm/io.h>
  53 #include <asm/pgtable.h>
  54 #include <asm/system.h>
  55 #include <asm/sections.h>
  56 #include <asm/irq.h>
  57 #include <asm/pmac_feature.h>
  58 #include <asm/pmac_pfunc.h>
  59 #include <asm/pmac_low_i2c.h>
  60 #include <asm/uaccess.h>
  61 #include <asm/mmu_context.h>
  62 #include <asm/cputable.h>
  63 #include <asm/time.h>
  64 #ifdef CONFIG_PMAC_BACKLIGHT
  65 #include <asm/backlight.h>
  66 #endif
  67
  68 #ifdef CONFIG_PPC32
  69 #include <asm/open_pic.h>
  70 #endif
  71
  72 #include "via-pmu-event.h"
  73
  74 /* Some compile options */
  75 #undef SUSPEND_USES_PMU
  76 #define DEBUG_SLEEP
  77 #undef HACKED_PCI_SAVE
  78
  79 /* Misc minor number allocated for /dev/pmu */
  80 #define PMU_MINOR               154
  81
  82 /* How many iterations between battery polls */
  83 #define BATTERY_POLLING_COUNT   2
  84
  85 static volatile unsigned char __iomem *via;
  86
  87 /* VIA registers - spaced 0x200 bytes apart */
  88 #define RS              0x200           /* skip between registers */
  89 #define B               0               /* B-side data */
  90 #define A               RS              /* A-side data */
  91 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  92 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  93 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  94 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  95 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  96 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  97 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  98 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  99 #define SR              (10*RS)         /* Shift register */
 100 #define ACR             (11*RS)         /* Auxiliary control register */
 101 #define PCR             (12*RS)         /* Peripheral control register */
 102 #define IFR             (13*RS)         /* Interrupt flag register */
 103 #define IER             (14*RS)         /* Interrupt enable register */
 104 #define ANH             (15*RS)         /* A-side data, no handshake */
 105
 106 /* Bits in B data register: both active low */
 107 #define TACK            0x08            /* Transfer acknowledge (input) */
 108 #define TREQ            0x10            /* Transfer request (output) */
 109
 110 /* Bits in ACR */
 111 #define SR_CTRL         0x1c            /* Shift register control bits */
 112 #define SR_EXT          0x0c            /* Shift on external clock */
 113 #define SR_OUT          0x10            /* Shift out if 1 */
 114
 115 /* Bits in IFR and IER */
 116 #define IER_SET         0x80            /* set bits in IER */
 117 #define IER_CLR         0               /* clear bits in IER */
 118 #define SR_INT          0x04            /* Shift register full/empty */
 119 #define CB2_INT         0x08
 120 #define CB1_INT         0x10            /* transition on CB1 input */
 121
 122 static volatile enum pmu_state {
 123         idle,
 124         sending,
 125         intack,
 126         reading,
 127         reading_intr,
 128         locked,
 129 } pmu_state;
 130
 131 static volatile enum int_data_state {
 132         int_data_empty,
 133         int_data_fill,
 134         int_data_ready,
 135         int_data_flush
 136 } int_data_state[2] = { int_data_empty, int_data_empty };
 137
 138 static struct adb_request *current_req;
 139 static struct adb_request *last_req;
 140 static struct adb_request *req_awaiting_reply;
 141 static unsigned char interrupt_data[2][32];
 142 static int interrupt_data_len[2];
 143 static int int_data_last;
 144 static unsigned char *reply_ptr;
 145 static int data_index;
 146 static int data_len;
 147 static volatile int adb_int_pending;
 148 static volatile int disable_poll;
 149 static struct device_node *vias;
 150 static int pmu_kind = PMU_UNKNOWN;
 151 static int pmu_fully_inited = 0;
 152 static int pmu_has_adb;
 153 static struct device_node *gpio_node;
 154 static unsigned char __iomem *gpio_reg = NULL;
 155 static int gpio_irq = -1;
 156 static int gpio_irq_enabled = -1;
 157 static volatile int pmu_suspended = 0;
 158 static spinlock_t pmu_lock;
 159 static u8 pmu_intr_mask;
 160 static int pmu_version;
 161 static int drop_interrupts;
 162 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 163 static int option_lid_wakeup = 1;
 164 #endif /* CONFIG_PM && CONFIG_PPC32 */
 165 #if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT_LEGACY)
 166 static int sleep_in_progress;
 167 #endif
 168 static unsigned long async_req_locks;
 169 static unsigned int pmu_irq_stats[11];
 170
 171 static struct proc_dir_entry *proc_pmu_root;
 172 static struct proc_dir_entry *proc_pmu_info;
 173 static struct proc_dir_entry *proc_pmu_irqstats;
 174 static struct proc_dir_entry *proc_pmu_options;
 175 static int option_server_mode;
 176
 177 int pmu_battery_count;
 178 int pmu_cur_battery;
 179 unsigned int pmu_power_flags;
 180 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 181 static int query_batt_timer = BATTERY_POLLING_COUNT;
 182 static struct adb_request batt_req;
 183 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 184
 185 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
 186 extern int disable_kernel_backlight;
 187 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
 188
 189 int __fake_sleep;
 190 int asleep;
 191 BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
 192
 193 #ifdef CONFIG_ADB
 194 static int adb_dev_map = 0;
 195 static int pmu_adb_flags;
 196
 197 static int pmu_probe(void);
 198 static int pmu_init(void);
 199 static int pmu_send_request(struct adb_request *req, int sync);
 200 static int pmu_adb_autopoll(int devs);
 201 static int pmu_adb_reset_bus(void);
 202 #endif /* CONFIG_ADB */
 203
 204 static int init_pmu(void);
 205 static void pmu_start(void);
 206 static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
 207 static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
 208 static int proc_get_info(char *page, char **start, off_t off,
 209                           int count, int *eof, void *data);
 210 static int proc_get_irqstats(char *page, char **start, off_t off,
 211                           int count, int *eof, void *data);
 212 static void pmu_pass_intr(unsigned char *data, int len);
 213 static int proc_get_batt(char *page, char **start, off_t off,
 214                         int count, int *eof, void *data);
 215 static int proc_read_options(char *page, char **start, off_t off,
 216                         int count, int *eof, void *data);
 217 static int proc_write_options(struct file *file, const char __user *buffer,
 218                         unsigned long count, void *data);
 219
 220 #ifdef CONFIG_ADB
 221 struct adb_driver via_pmu_driver = {
 222         "PMU",
 223         pmu_probe,
 224         pmu_init,
 225         pmu_send_request,
 226         pmu_adb_autopoll,
 227         pmu_poll_adb,
 228         pmu_adb_reset_bus
 229 };
 230 #endif /* CONFIG_ADB */
 231
 232 extern void low_sleep_handler(void);
 233 extern void enable_kernel_altivec(void);
 234 extern void enable_kernel_fp(void);
 235
 236 #ifdef DEBUG_SLEEP
 237 int pmu_polled_request(struct adb_request *req);
 238 int pmu_wink(struct adb_request *req);
 239 #endif
 240
 241 /*
 242  * This table indicates for each PMU opcode:
 243  * - the number of data bytes to be sent with the command, or -1
 244  *   if a length byte should be sent,
 245  * - the number of response bytes which the PMU will return, or
 246  *   -1 if it will send a length byte.
 247  */
 248 static const s8 pmu_data_len[256][2] = {
 249 /*         0       1       2       3       4       5       6       7  */
 250 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 251 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 252 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 253 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 254 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 255 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 256 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 257 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 258 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 259 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 260 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 261 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 262 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 263 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 264 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 265 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 266 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 267 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 268 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 269 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 270 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 271 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 272 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 273 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 274 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 275 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 276 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 277 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 278 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 279 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 280 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 281 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 282 };
 283
 284 static char *pbook_type[] = {
 285         "Unknown PowerBook",
 286         "PowerBook 2400/3400/3500(G3)",
 287         "PowerBook G3 Series",
 288         "1999 PowerBook G3",
 289         "Core99"
 290 };
 291
 292 int __init find_via_pmu(void)
 293 {
 294         u64 taddr;
 295         u32 *reg;
 296
 297         if (via != 0)
 298                 return 1;
 299         vias = of_find_node_by_name(NULL, "via-pmu");
 300         if (vias == NULL)
 301                 return 0;
 302
 303         reg = (u32 *)get_property(vias, "reg", NULL);
 304         if (reg == NULL) {
 305                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 306                 goto fail;
 307         }
 308         taddr = of_translate_address(vias, reg);
 309         if (taddr == OF_BAD_ADDR) {
 310                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 311                 goto fail;
 312         }
 313
 314         spin_lock_init(&pmu_lock);
 315
 316         pmu_has_adb = 1;
 317
 318         pmu_intr_mask = PMU_INT_PCEJECT |
 319                         PMU_INT_SNDBRT |
 320                         PMU_INT_ADB |
 321                         PMU_INT_TICK;
 322
 323         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 324             || device_is_compatible(vias->parent, "ohare")))
 325                 pmu_kind = PMU_OHARE_BASED;
 326         else if (device_is_compatible(vias->parent, "paddington"))
 327                 pmu_kind = PMU_PADDINGTON_BASED;
 328         else if (device_is_compatible(vias->parent, "heathrow"))
 329                 pmu_kind = PMU_HEATHROW_BASED;
 330         else if (device_is_compatible(vias->parent, "Keylargo")
 331                  || device_is_compatible(vias->parent, "K2-Keylargo")) {
 332                 struct device_node *gpiop;
 333                 u64 gaddr = OF_BAD_ADDR;
 334
 335                 pmu_kind = PMU_KEYLARGO_BASED;
 336                 pmu_has_adb = (find_type_devices("adb") != NULL);
 337                 pmu_intr_mask = PMU_INT_PCEJECT |
 338                                 PMU_INT_SNDBRT |
 339                                 PMU_INT_ADB |
 340                                 PMU_INT_TICK |
 341                                 PMU_INT_ENVIRONMENT;
 342
 343                 gpiop = of_find_node_by_name(NULL, "gpio");
 344                 if (gpiop) {
 345                         reg = (u32 *)get_property(gpiop, "reg", NULL);
 346                         if (reg)
 347                                 gaddr = of_translate_address(gpiop, reg);
 348                         if (gaddr != OF_BAD_ADDR)
 349                                 gpio_reg = ioremap(gaddr, 0x10);
 350                 }
 351                 if (gpio_reg == NULL)
 352                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 353         } else
 354                 pmu_kind = PMU_UNKNOWN;
 355
 356         via = ioremap(taddr, 0x2000);
 357         if (via == NULL) {
 358                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 359                 goto fail;
 360         }
 361
 362         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 363         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 364
 365         pmu_state = idle;
 366
 367         if (!init_pmu()) {
 368                 via = NULL;
 369                 return 0;
 370         }
 371
 372         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 373                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 374
 375         sys_ctrler = SYS_CTRLER_PMU;
 376
 377         return 1;
 378  fail:
 379         of_node_put(vias);
 380         vias = NULL;
 381         return 0;
 382 }
 383
 384 #ifdef CONFIG_ADB
 385 static int pmu_probe(void)
 386 {
 387         return vias == NULL? -ENODEV: 0;
 388 }
 389
 390 static int __init pmu_init(void)
 391 {
 392         if (vias == NULL)
 393                 return -ENODEV;
 394         return 0;
 395 }
 396 #endif /* CONFIG_ADB */
 397
 398 /*
 399  * We can't wait until pmu_init gets called, that happens too late.
 400  * It happens after IDE and SCSI initialization, which can take a few
 401  * seconds, and by that time the PMU could have given up on us and
 402  * turned us off.
 403  * Thus this is called with arch_initcall rather than device_initcall.
 404  */
 405 static int __init via_pmu_start(void)
 406 {
 407         if (vias == NULL)
 408                 return -ENODEV;
 409
 410         batt_req.complete = 1;
 411
 412 #ifndef CONFIG_PPC_MERGE
 413         if (pmu_kind == PMU_KEYLARGO_BASED)
 414                 openpic_set_irq_priority(vias->intrs[0].line,
 415                                          OPENPIC_PRIORITY_DEFAULT + 1);
 416 #endif
 417
 418         if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU",
 419                         (void *)0)) {
 420                 printk(KERN_ERR "VIA-PMU: can't get irq %d\n",
 421                        vias->intrs[0].line);
 422                 return -EAGAIN;
 423         }
 424
 425         if (pmu_kind == PMU_KEYLARGO_BASED) {
 426                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 427                 if (gpio_node == NULL)
 428                         gpio_node = of_find_node_by_name(NULL,
 429                                                          "pmu-interrupt");
 430                 if (gpio_node && gpio_node->n_intrs > 0)
 431                         gpio_irq = gpio_node->intrs[0].line;
 432
 433                 if (gpio_irq != -1) {
 434                         if (request_irq(gpio_irq, gpio1_interrupt, 0,
 435                                         "GPIO1 ADB", (void *)0))
 436                                 printk(KERN_ERR "pmu: can't get irq %d"
 437                                        " (GPIO1)\n", gpio_irq);
 438                         else
 439                                 gpio_irq_enabled = 1;
 440                 }
 441         }
 442
 443         /* Enable interrupts */
 444         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 445
 446         pmu_fully_inited = 1;
 447
 448         /* Make sure PMU settle down before continuing. This is _very_ important
 449          * since the IDE probe may shut interrupts down for quite a bit of time. If
 450          * a PMU communication is pending while this happens, the PMU may timeout
 451          * Not that on Core99 machines, the PMU keeps sending us environement
 452          * messages, we should find a way to either fix IDE or make it call
 453          * pmu_suspend() before masking interrupts. This can also happens while
 454          * scolling with some fbdevs.
 455          */
 456         do {
 457                 pmu_poll();
 458         } while (pmu_state != idle);
 459
 460         return 0;
 461 }
 462
 463 arch_initcall(via_pmu_start);
 464
 465 /*
 466  * This has to be done after pci_init, which is a subsys_initcall.
 467  */
 468 static int __init via_pmu_dev_init(void)
 469 {
 470         if (vias == NULL)
 471                 return -ENODEV;
 472
 473 #ifdef CONFIG_PMAC_BACKLIGHT
 474         /* Initialize backlight */
 475         pmu_backlight_init(vias);
 476 #endif
 477
 478 #ifdef CONFIG_PPC32
 479         if (machine_is_compatible("AAPL,3400/2400") ||
 480                 machine_is_compatible("AAPL,3500")) {
 481                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 482                         NULL, PMAC_MB_INFO_MODEL, 0);
 483                 pmu_battery_count = 1;
 484                 if (mb == PMAC_TYPE_COMET)
 485                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 486                 else
 487                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 488         } else if (machine_is_compatible("AAPL,PowerBook1998") ||
 489                 machine_is_compatible("PowerBook1,1")) {
 490                 pmu_battery_count = 2;
 491                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 492                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 493         } else {
 494                 struct device_node* prim = find_devices("power-mgt");
 495                 u32 *prim_info = NULL;
 496                 if (prim)
 497                         prim_info = (u32 *)get_property(prim, "prim-info", NULL);
 498                 if (prim_info) {
 499                         /* Other stuffs here yet unknown */
 500                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 501                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 502                         if (pmu_battery_count > 1)
 503                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 504                 }
 505         }
 506 #endif /* CONFIG_PPC32 */
 507
 508         /* Create /proc/pmu */
 509         proc_pmu_root = proc_mkdir("pmu", NULL);
 510         if (proc_pmu_root) {
 511                 long i;
 512
 513                 for (i=0; i<pmu_battery_count; i++) {
 514                         char title[16];
 515                         sprintf(title, "battery_%ld", i);
 516                         proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
 517                                                 proc_get_batt, (void *)i);
 518                 }
 519
 520                 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
 521                                         proc_get_info, NULL);
 522                 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
 523                                         proc_get_irqstats, NULL);
 524                 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
 525                 if (proc_pmu_options) {
 526                         proc_pmu_options->nlink = 1;
 527                         proc_pmu_options->read_proc = proc_read_options;
 528                         proc_pmu_options->write_proc = proc_write_options;
 529                 }
 530         }
 531         return 0;
 532 }
 533
 534 device_initcall(via_pmu_dev_init);
 535
 536 static int
 537 init_pmu(void)
 538 {
 539         int timeout;
 540         struct adb_request req;
 541
 542         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 543         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 544
 545         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 546         timeout =  100000;
 547         while (!req.complete) {
 548                 if (--timeout < 0) {
 549                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 550                         return 0;
 551                 }
 552                 udelay(10);
 553                 pmu_poll();
 554         }
 555
 556         /* ack all pending interrupts */
 557         timeout = 100000;
 558         interrupt_data[0][0] = 1;
 559         while (interrupt_data[0][0] || pmu_state != idle) {
 560                 if (--timeout < 0) {
 561                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 562                         return 0;
 563                 }
 564                 if (pmu_state == idle)
 565                         adb_int_pending = 1;
 566                 via_pmu_interrupt(0, NULL, NULL);
 567                 udelay(10);
 568         }
 569
 570         /* Tell PMU we are ready.  */
 571         if (pmu_kind == PMU_KEYLARGO_BASED) {
 572                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 573                 while (!req.complete)
 574                         pmu_poll();
 575         }
 576
 577         /* Read PMU version */
 578         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 579         pmu_wait_complete(&req);
 580         if (req.reply_len > 0)
 581                 pmu_version = req.reply[0];
 582
 583         /* Read server mode setting */
 584         if (pmu_kind == PMU_KEYLARGO_BASED) {
 585                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 586                             PMU_PWR_GET_POWERUP_EVENTS);
 587                 pmu_wait_complete(&req);
 588                 if (req.reply_len == 2) {
 589                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 590                                 option_server_mode = 1;
 591                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 592                                option_server_mode ? "enabled" : "disabled");
 593                 }
 594         }
 595         return 1;
 596 }
 597
 598 int
 599 pmu_get_model(void)
 600 {
 601         return pmu_kind;
 602 }
 603
 604 static void pmu_set_server_mode(int server_mode)
 605 {
 606         struct adb_request req;
 607
 608         if (pmu_kind != PMU_KEYLARGO_BASED)
 609                 return;
 610
 611         option_server_mode = server_mode;
 612         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 613         pmu_wait_complete(&req);
 614         if (req.reply_len < 2)
 615                 return;
 616         if (server_mode)
 617                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 618                             PMU_PWR_SET_POWERUP_EVENTS,
 619                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 620         else
 621                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 622                             PMU_PWR_CLR_POWERUP_EVENTS,
 623                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 624         pmu_wait_complete(&req);
 625 }
 626
 627 /* This new version of the code for 2400/3400/3500 powerbooks
 628  * is inspired from the implementation in gkrellm-pmu
 629  */
 630 static void
 631 done_battery_state_ohare(struct adb_request* req)
 632 {
 633         /* format:
 634          *  [0]    :  flags
 635          *    0x01 :  AC indicator
 636          *    0x02 :  charging
 637          *    0x04 :  battery exist
 638          *    0x08 :
 639          *    0x10 :
 640          *    0x20 :  full charged
 641          *    0x40 :  pcharge reset
 642          *    0x80 :  battery exist
 643          *
 644          *  [1][2] :  battery voltage
 645          *  [3]    :  CPU temperature
 646          *  [4]    :  battery temperature
 647          *  [5]    :  current
 648          *  [6][7] :  pcharge
 649          *              --tkoba
 650          */
 651         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 652         long pcharge, charge, vb, vmax, lmax;
 653         long vmax_charging, vmax_charged;
 654         long amperage, voltage, time, max;
 655         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 656                         NULL, PMAC_MB_INFO_MODEL, 0);
 657
 658         if (req->reply[0] & 0x01)
 659                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 660         else
 661                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 662
 663         if (mb == PMAC_TYPE_COMET) {
 664                 vmax_charged = 189;
 665                 vmax_charging = 213;
 666                 lmax = 6500;
 667         } else {
 668                 vmax_charged = 330;
 669                 vmax_charging = 330;
 670                 lmax = 6500;
 671         }
 672         vmax = vmax_charged;
 673
 674         /* If battery installed */
 675         if (req->reply[0] & 0x04) {
 676                 bat_flags |= PMU_BATT_PRESENT;
 677                 if (req->reply[0] & 0x02)
 678                         bat_flags |= PMU_BATT_CHARGING;
 679                 vb = (req->reply[1] << 8) | req->reply[2];
 680                 voltage = (vb * 265 + 72665) / 10;
 681                 amperage = req->reply[5];
 682                 if ((req->reply[0] & 0x01) == 0) {
 683                         if (amperage > 200)
 684                                 vb += ((amperage - 200) * 15)/100;
 685                 } else if (req->reply[0] & 0x02) {
 686                         vb = (vb * 97) / 100;
 687                         vmax = vmax_charging;
 688                 }
 689                 charge = (100 * vb) / vmax;
 690                 if (req->reply[0] & 0x40) {
 691                         pcharge = (req->reply[6] << 8) + req->reply[7];
 692                         if (pcharge > lmax)
 693                                 pcharge = lmax;
 694                         pcharge *= 100;
 695                         pcharge = 100 - pcharge / lmax;
 696                         if (pcharge < charge)
 697                                 charge = pcharge;
 698                 }
 699                 if (amperage > 0)
 700                         time = (charge * 16440) / amperage;
 701                 else
 702                         time = 0;
 703                 max = 100;
 704                 amperage = -amperage;
 705         } else
 706                 charge = max = amperage = voltage = time = 0;
 707
 708         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 709         pmu_batteries[pmu_cur_battery].charge = charge;
 710         pmu_batteries[pmu_cur_battery].max_charge = max;
 711         pmu_batteries[pmu_cur_battery].amperage = amperage;
 712         pmu_batteries[pmu_cur_battery].voltage = voltage;
 713         pmu_batteries[pmu_cur_battery].time_remaining = time;
 714
 715         clear_bit(0, &async_req_locks);
 716 }
 717
 718 static void
 719 done_battery_state_smart(struct adb_request* req)
 720 {
 721         /* format:
 722          *  [0] : format of this structure (known: 3,4,5)
 723          *  [1] : flags
 724          *
 725          *  format 3 & 4:
 726          *
 727          *  [2] : charge
 728          *  [3] : max charge
 729          *  [4] : current
 730          *  [5] : voltage
 731          *
 732          *  format 5:
 733          *
 734          *  [2][3] : charge
 735          *  [4][5] : max charge
 736          *  [6][7] : current
 737          *  [8][9] : voltage
 738          */
 739
 740         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 741         int amperage;
 742         unsigned int capa, max, voltage;
 743
 744         if (req->reply[1] & 0x01)
 745                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 746         else
 747                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 748
 749
 750         capa = max = amperage = voltage = 0;
 751
 752         if (req->reply[1] & 0x04) {
 753                 bat_flags |= PMU_BATT_PRESENT;
 754                 switch(req->reply[0]) {
 755                         case 3:
 756                         case 4: capa = req->reply[2];
 757                                 max = req->reply[3];
 758                                 amperage = *((signed char *)&req->reply[4]);
 759                                 voltage = req->reply[5];
 760                                 break;
 761                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 762                                 max = (req->reply[4] << 8) | req->reply[5];
 763                                 amperage = *((signed short *)&req->reply[6]);
 764                                 voltage = (req->reply[8] << 8) | req->reply[9];
 765                                 break;
 766                         default:
 767                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 768                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 769                                 break;
 770                 }
 771         }
 772
 773         if ((req->reply[1] & 0x01) && (amperage > 0))
 774                 bat_flags |= PMU_BATT_CHARGING;
 775
 776         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 777         pmu_batteries[pmu_cur_battery].charge = capa;
 778         pmu_batteries[pmu_cur_battery].max_charge = max;
 779         pmu_batteries[pmu_cur_battery].amperage = amperage;
 780         pmu_batteries[pmu_cur_battery].voltage = voltage;
 781         if (amperage) {
 782                 if ((req->reply[1] & 0x01) && (amperage > 0))
 783                         pmu_batteries[pmu_cur_battery].time_remaining
 784                                 = ((max-capa) * 3600) / amperage;
 785                 else
 786                         pmu_batteries[pmu_cur_battery].time_remaining
 787                                 = (capa * 3600) / (-amperage);
 788         } else
 789                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 790
 791         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 792
 793         clear_bit(0, &async_req_locks);
 794 }
 795
 796 static void
 797 query_battery_state(void)
 798 {
 799         if (test_and_set_bit(0, &async_req_locks))
 800                 return;
 801         if (pmu_kind == PMU_OHARE_BASED)
 802                 pmu_request(&batt_req, done_battery_state_ohare,
 803                         1, PMU_BATTERY_STATE);
 804         else
 805                 pmu_request(&batt_req, done_battery_state_smart,
 806                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 807 }
 808
 809 static int
 810 proc_get_info(char *page, char **start, off_t off,
 811                 int count, int *eof, void *data)
 812 {
 813         char* p = page;
 814
 815         p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 816         p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
 817         p += sprintf(p, "AC Power               : %d\n",
 818                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 819         p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);
 820
 821         return p - page;
 822 }
 823
 824 static int
 825 proc_get_irqstats(char *page, char **start, off_t off,
 826                   int count, int *eof, void *data)
 827 {
 828         int i;
 829         char* p = page;
 830         static const char *irq_names[] = {
 831                 "Total CB1 triggered events",
 832                 "Total GPIO1 triggered events",
 833                 "PC-Card eject button",
 834                 "Sound/Brightness button",
 835                 "ADB message",
 836                 "Battery state change",
 837                 "Environment interrupt",
 838                 "Tick timer",
 839                 "Ghost interrupt (zero len)",
 840                 "Empty interrupt (empty mask)",
 841                 "Max irqs in a row"
 842         };
 843
 844         for (i=0; i<11; i++) {
 845                 p += sprintf(p, " %2u: %10u (%s)\n",
 846                              i, pmu_irq_stats[i], irq_names[i]);
 847         }
 848         return p - page;
 849 }
 850
 851 static int
 852 proc_get_batt(char *page, char **start, off_t off,
 853                 int count, int *eof, void *data)
 854 {
 855         long batnum = (long)data;
 856         char *p = page;
 857
 858         p += sprintf(p, "\n");
 859         p += sprintf(p, "flags      : %08x\n",
 860                 pmu_batteries[batnum].flags);
 861         p += sprintf(p, "charge     : %d\n",
 862                 pmu_batteries[batnum].charge);
 863         p += sprintf(p, "max_charge : %d\n",
 864                 pmu_batteries[batnum].max_charge);
 865         p += sprintf(p, "current    : %d\n",
 866                 pmu_batteries[batnum].amperage);
 867         p += sprintf(p, "voltage    : %d\n",
 868                 pmu_batteries[batnum].voltage);
 869         p += sprintf(p, "time rem.  : %d\n",
 870                 pmu_batteries[batnum].time_remaining);
 871
 872         return p - page;
 873 }
 874
 875 static int
 876 proc_read_options(char *page, char **start, off_t off,
 877                         int count, int *eof, void *data)
 878 {
 879         char *p = page;
 880
 881 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 882         if (pmu_kind == PMU_KEYLARGO_BASED &&
 883             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 884                 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
 885 #endif
 886         if (pmu_kind == PMU_KEYLARGO_BASED)
 887                 p += sprintf(p, "server_mode=%d\n", option_server_mode);
 888
 889         return p - page;
 890 }
 891
 892 static int
 893 proc_write_options(struct file *file, const char __user *buffer,
 894                         unsigned long count, void *data)
 895 {
 896         char tmp[33];
 897         char *label, *val;
 898         unsigned long fcount = count;
 899
 900         if (!count)
 901                 return -EINVAL;
 902         if (count > 32)
 903                 count = 32;
 904         if (copy_from_user(tmp, buffer, count))
 905                 return -EFAULT;
 906         tmp[count] = 0;
 907
 908         label = tmp;
 909         while(*label == ' ')
 910                 label++;
 911         val = label;
 912         while(*val && (*val != '=')) {
 913                 if (*val == ' ')
 914                         *val = 0;
 915                 val++;
 916         }
 917         if ((*val) == 0)
 918                 return -EINVAL;
 919         *(val++) = 0;
 920         while(*val == ' ')
 921                 val++;
 922 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 923         if (pmu_kind == PMU_KEYLARGO_BASED &&
 924             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 925                 if (!strcmp(label, "lid_wakeup"))
 926                         option_lid_wakeup = ((*val) == '1');
 927 #endif
 928         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 929                 int new_value;
 930                 new_value = ((*val) == '1');
 931                 if (new_value != option_server_mode)
 932                         pmu_set_server_mode(new_value);
 933         }
 934         return fcount;
 935 }
 936
 937 #ifdef CONFIG_ADB
 938 /* Send an ADB command */
 939 static int
 940 pmu_send_request(struct adb_request *req, int sync)
 941 {
 942         int i, ret;
 943
 944         if ((vias == NULL) || (!pmu_fully_inited)) {
 945                 req->complete = 1;
 946                 return -ENXIO;
 947         }
 948
 949         ret = -EINVAL;
 950
 951         switch (req->data[0]) {
 952         case PMU_PACKET:
 953                 for (i = 0; i < req->nbytes - 1; ++i)
 954                         req->data[i] = req->data[i+1];
 955                 --req->nbytes;
 956                 if (pmu_data_len[req->data[0]][1] != 0) {
 957                         req->reply[0] = ADB_RET_OK;
 958                         req->reply_len = 1;
 959                 } else
 960                         req->reply_len = 0;
 961                 ret = pmu_queue_request(req);
 962                 break;
 963         case CUDA_PACKET:
 964                 switch (req->data[1]) {
 965                 case CUDA_GET_TIME:
 966                         if (req->nbytes != 2)
 967                                 break;
 968                         req->data[0] = PMU_READ_RTC;
 969                         req->nbytes = 1;
 970                         req->reply_len = 3;
 971                         req->reply[0] = CUDA_PACKET;
 972                         req->reply[1] = 0;
 973                         req->reply[2] = CUDA_GET_TIME;
 974                         ret = pmu_queue_request(req);
 975                         break;
 976                 case CUDA_SET_TIME:
 977                         if (req->nbytes != 6)
 978                                 break;
 979                         req->data[0] = PMU_SET_RTC;
 980                         req->nbytes = 5;
 981                         for (i = 1; i <= 4; ++i)
 982                                 req->data[i] = req->data[i+1];
 983                         req->reply_len = 3;
 984                         req->reply[0] = CUDA_PACKET;
 985                         req->reply[1] = 0;
 986                         req->reply[2] = CUDA_SET_TIME;
 987                         ret = pmu_queue_request(req);
 988                         break;
 989                 }
 990                 break;
 991         case ADB_PACKET:
 992                 if (!pmu_has_adb)
 993                         return -ENXIO;
 994                 for (i = req->nbytes - 1; i > 1; --i)
 995                         req->data[i+2] = req->data[i];
 996                 req->data[3] = req->nbytes - 2;
 997                 req->data[2] = pmu_adb_flags;
 998                 /*req->data[1] = req->data[1];*/
 999                 req->data[0] = PMU_ADB_CMD;
1000                 req->nbytes += 2;
1001                 req->reply_expected = 1;
1002                 req->reply_len = 0;
1003                 ret = pmu_queue_request(req);
1004                 break;
1005         }
1006         if (ret) {
1007                 req->complete = 1;
1008                 return ret;
1009         }
1010
1011         if (sync)
1012                 while (!req->complete)
1013                         pmu_poll();
1014
1015         return 0;
1016 }
1017
1018 /* Enable/disable autopolling */
1019 static int
1020 pmu_adb_autopoll(int devs)
1021 {
1022         struct adb_request req;
1023
1024         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1025                 return -ENXIO;
1026
1027         if (devs) {
1028                 adb_dev_map = devs;
1029                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1030                             adb_dev_map >> 8, adb_dev_map);
1031                 pmu_adb_flags = 2;
1032         } else {
1033                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1034                 pmu_adb_flags = 0;
1035         }
1036         while (!req.complete)
1037                 pmu_poll();
1038         return 0;
1039 }
1040
1041 /* Reset the ADB bus */
1042 static int
1043 pmu_adb_reset_bus(void)
1044 {
1045         struct adb_request req;
1046         int save_autopoll = adb_dev_map;
1047
1048         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1049                 return -ENXIO;
1050
1051         /* anyone got a better idea?? */
1052         pmu_adb_autopoll(0);
1053
1054         req.nbytes = 5;
1055         req.done = NULL;
1056         req.data[0] = PMU_ADB_CMD;
1057         req.data[1] = 0;
1058         req.data[2] = ADB_BUSRESET;
1059         req.data[3] = 0;
1060         req.data[4] = 0;
1061         req.reply_len = 0;
1062         req.reply_expected = 1;
1063         if (pmu_queue_request(&req) != 0) {
1064                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1065                 return -EIO;
1066         }
1067         pmu_wait_complete(&req);
1068
1069         if (save_autopoll != 0)
1070                 pmu_adb_autopoll(save_autopoll);
1071
1072         return 0;
1073 }
1074 #endif /* CONFIG_ADB */
1075
1076 /* Construct and send a pmu request */
1077 int
1078 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1079             int nbytes, ...)
1080 {
1081         va_list list;
1082         int i;
1083
1084         if (vias == NULL)
1085                 return -ENXIO;
1086
1087         if (nbytes < 0 || nbytes > 32) {
1088                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1089                 req->complete = 1;
1090                 return -EINVAL;
1091         }
1092         req->nbytes = nbytes;
1093         req->done = done;
1094         va_start(list, nbytes);
1095         for (i = 0; i < nbytes; ++i)
1096                 req->data[i] = va_arg(list, int);
1097         va_end(list);
1098         req->reply_len = 0;
1099         req->reply_expected = 0;
1100         return pmu_queue_request(req);
1101 }
1102
1103 int
1104 pmu_queue_request(struct adb_request *req)
1105 {
1106         unsigned long flags;
1107         int nsend;
1108
1109         if (via == NULL) {
1110                 req->complete = 1;
1111                 return -ENXIO;
1112         }
1113         if (req->nbytes <= 0) {
1114                 req->complete = 1;
1115                 return 0;
1116         }
1117         nsend = pmu_data_len[req->data[0]][0];
1118         if (nsend >= 0 && req->nbytes != nsend + 1) {
1119                 req->complete = 1;
1120                 return -EINVAL;
1121         }
1122
1123         req->next = NULL;
1124         req->sent = 0;
1125         req->complete = 0;
1126
1127         spin_lock_irqsave(&pmu_lock, flags);
1128         if (current_req != 0) {
1129                 last_req->next = req;
1130                 last_req = req;
1131         } else {
1132                 current_req = req;
1133                 last_req = req;
1134                 if (pmu_state == idle)
1135                         pmu_start();
1136         }
1137         spin_unlock_irqrestore(&pmu_lock, flags);
1138
1139         return 0;
1140 }
1141
1142 static inline void
1143 wait_for_ack(void)
1144 {
1145         /* Sightly increased the delay, I had one occurrence of the message
1146          * reported
1147          */
1148         int timeout = 4000;
1149         while ((in_8(&via[B]) & TACK) == 0) {
1150                 if (--timeout < 0) {
1151                         printk(KERN_ERR "PMU not responding (!ack)\n");
1152                         return;
1153                 }
1154                 udelay(10);
1155         }
1156 }
1157
1158 /* New PMU seems to be very sensitive to those timings, so we make sure
1159  * PCI is flushed immediately */
1160 static inline void
1161 send_byte(int x)
1162 {
1163         volatile unsigned char __iomem *v = via;
1164
1165         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1166         out_8(&v[SR], x);
1167         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1168         (void)in_8(&v[B]);
1169 }
1170
1171 static inline void
1172 recv_byte(void)
1173 {
1174         volatile unsigned char __iomem *v = via;
1175
1176         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1177         in_8(&v[SR]);           /* resets SR */
1178         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1179         (void)in_8(&v[B]);
1180 }
1181
1182 static inline void
1183 pmu_done(struct adb_request *req)
1184 {
1185         void (*done)(struct adb_request *) = req->done;
1186         mb();
1187         req->complete = 1;
1188         /* Here, we assume that if the request has a done member, the
1189          * struct request will survive to setting req->complete to 1
1190          */
1191         if (done)
1192                 (*done)(req);
1193 }
1194
1195 static void
1196 pmu_start(void)
1197 {
1198         struct adb_request *req;
1199
1200         /* assert pmu_state == idle */
1201         /* get the packet to send */
1202         req = current_req;
1203         if (req == 0 || pmu_state != idle
1204             || (/*req->reply_expected && */req_awaiting_reply))
1205                 return;
1206
1207         pmu_state = sending;
1208         data_index = 1;
1209         data_len = pmu_data_len[req->data[0]][0];
1210
1211         /* Sounds safer to make sure ACK is high before writing. This helped
1212          * kill a problem with ADB and some iBooks
1213          */
1214         wait_for_ack();
1215         /* set the shift register to shift out and send a byte */
1216         send_byte(req->data[0]);
1217 }
1218
1219 void
1220 pmu_poll(void)
1221 {
1222         if (!via)
1223                 return;
1224         if (disable_poll)
1225                 return;
1226         via_pmu_interrupt(0, NULL, NULL);
1227 }
1228
1229 void
1230 pmu_poll_adb(void)
1231 {
1232         if (!via)
1233                 return;
1234         if (disable_poll)
1235                 return;
1236         /* Kicks ADB read when PMU is suspended */
1237         adb_int_pending = 1;
1238         do {
1239                 via_pmu_interrupt(0, NULL, NULL);
1240         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1241                 || req_awaiting_reply));
1242 }
1243
1244 void
1245 pmu_wait_complete(struct adb_request *req)
1246 {
1247         if (!via)
1248                 return;
1249         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1250                 via_pmu_interrupt(0, NULL, NULL);
1251 }
1252
1253 /* This function loops until the PMU is idle and prevents it from
1254  * anwsering to ADB interrupts. pmu_request can still be called.
1255  * This is done to avoid spurrious shutdowns when we know we'll have
1256  * interrupts switched off for a long time
1257  */
1258 void
1259 pmu_suspend(void)
1260 {
1261         unsigned long flags;
1262 #ifdef SUSPEND_USES_PMU
1263         struct adb_request *req;
1264 #endif
1265         if (!via)
1266                 return;
1267
1268         spin_lock_irqsave(&pmu_lock, flags);
1269         pmu_suspended++;
1270         if (pmu_suspended > 1) {
1271                 spin_unlock_irqrestore(&pmu_lock, flags);
1272                 return;
1273         }
1274
1275         do {
1276                 spin_unlock_irqrestore(&pmu_lock, flags);
1277                 if (req_awaiting_reply)
1278                         adb_int_pending = 1;
1279                 via_pmu_interrupt(0, NULL, NULL);
1280                 spin_lock_irqsave(&pmu_lock, flags);
1281                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1282 #ifdef SUSPEND_USES_PMU
1283                         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1284                         spin_unlock_irqrestore(&pmu_lock, flags);
1285                         while(!req.complete)
1286                                 pmu_poll();
1287 #else /* SUSPEND_USES_PMU */
1288                         if (gpio_irq >= 0)
1289                                 disable_irq_nosync(gpio_irq);
1290                         out_8(&via[IER], CB1_INT | IER_CLR);
1291                         spin_unlock_irqrestore(&pmu_lock, flags);
1292 #endif /* SUSPEND_USES_PMU */
1293                         break;
1294                 }
1295         } while (1);
1296 }
1297
1298 void
1299 pmu_resume(void)
1300 {
1301         unsigned long flags;
1302
1303         if (!via || (pmu_suspended < 1))
1304                 return;
1305
1306         spin_lock_irqsave(&pmu_lock, flags);
1307         pmu_suspended--;
1308         if (pmu_suspended > 0) {
1309                 spin_unlock_irqrestore(&pmu_lock, flags);
1310                 return;
1311         }
1312         adb_int_pending = 1;
1313 #ifdef SUSPEND_USES_PMU
1314         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1315         spin_unlock_irqrestore(&pmu_lock, flags);
1316         while(!req.complete)
1317                 pmu_poll();
1318 #else /* SUSPEND_USES_PMU */
1319         if (gpio_irq >= 0)
1320                 enable_irq(gpio_irq);
1321         out_8(&via[IER], CB1_INT | IER_SET);
1322         spin_unlock_irqrestore(&pmu_lock, flags);
1323         pmu_poll();
1324 #endif /* SUSPEND_USES_PMU */
1325 }
1326
1327 /* Interrupt data could be the result data from an ADB cmd */
1328 static void
1329 pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs)
1330 {
1331         unsigned char ints, pirq;
1332         int i = 0;
1333
1334         asleep = 0;
1335         if (drop_interrupts || len < 1) {
1336                 adb_int_pending = 0;
1337                 pmu_irq_stats[8]++;
1338                 return;
1339         }
1340
1341         /* Get PMU interrupt mask */
1342         ints = data[0];
1343
1344         /* Record zero interrupts for stats */
1345         if (ints == 0)
1346                 pmu_irq_stats[9]++;
1347
1348         /* Hack to deal with ADB autopoll flag */
1349         if (ints & PMU_INT_ADB)
1350                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1351
1352 next:
1353
1354         if (ints == 0) {
1355                 if (i > pmu_irq_stats[10])
1356                         pmu_irq_stats[10] = i;
1357                 return;
1358         }
1359
1360         for (pirq = 0; pirq < 8; pirq++)
1361                 if (ints & (1 << pirq))
1362                         break;
1363         pmu_irq_stats[pirq]++;
1364         i++;
1365         ints &= ~(1 << pirq);
1366
1367         /* Note: for some reason, we get an interrupt with len=1,
1368          * data[0]==0 after each normal ADB interrupt, at least
1369          * on the Pismo. Still investigating...  --BenH
1370          */
1371         if ((1 << pirq) & PMU_INT_ADB) {
1372                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1373                         struct adb_request *req = req_awaiting_reply;
1374                         if (req == 0) {
1375                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1376                                 return;
1377                         }
1378                         req_awaiting_reply = NULL;
1379                         if (len <= 2)
1380                                 req->reply_len = 0;
1381                         else {
1382                                 memcpy(req->reply, data + 1, len - 1);
1383                                 req->reply_len = len - 1;
1384                         }
1385                         pmu_done(req);
1386                 } else {
1387                         if (len == 4 && data[1] == 0x2c) {
1388                                 extern int xmon_wants_key, xmon_adb_keycode;
1389                                 if (xmon_wants_key) {
1390                                         xmon_adb_keycode = data[2];
1391                                         return;
1392                                 }
1393                         }
1394 #ifdef CONFIG_ADB
1395                         /*
1396                          * XXX On the [23]400 the PMU gives us an up
1397                          * event for keycodes 0x74 or 0x75 when the PC
1398                          * card eject buttons are released, so we
1399                          * ignore those events.
1400                          */
1401                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1402                               && data[1] == 0x2c && data[3] == 0xff
1403                               && (data[2] & ~1) == 0xf4))
1404                                 adb_input(data+1, len-1, regs, 1);
1405 #endif /* CONFIG_ADB */
1406                 }
1407         }
1408         /* Sound/brightness button pressed */
1409         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1410 #ifdef CONFIG_PMAC_BACKLIGHT
1411                 if (len == 3)
1412 #ifdef CONFIG_INPUT_ADBHID
1413                         if (!disable_kernel_backlight)
1414 #endif /* CONFIG_INPUT_ADBHID */
1415                                 pmac_backlight_set_legacy_brightness(data[1] >> 4);
1416 #endif /* CONFIG_PMAC_BACKLIGHT */
1417         }
1418         /* Tick interrupt */
1419         else if ((1 << pirq) & PMU_INT_TICK) {
1420                 /* Environement or tick interrupt, query batteries */
1421                 if (pmu_battery_count) {
1422                         if ((--query_batt_timer) == 0) {
1423                                 query_battery_state();
1424                                 query_batt_timer = BATTERY_POLLING_COUNT;
1425                         }
1426                 }
1427         }
1428         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1429                 if (pmu_battery_count)
1430                         query_battery_state();
1431                 pmu_pass_intr(data, len);
1432                 /* len == 6 is probably a bad check. But how do I
1433                  * know what PMU versions send what events here? */
1434                 if (len == 6) {
1435                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1436                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1437                 }
1438         } else {
1439                pmu_pass_intr(data, len);
1440         }
1441         goto next;
1442 }
1443
1444 static struct adb_request*
1445 pmu_sr_intr(struct pt_regs *regs)
1446 {
1447         struct adb_request *req;
1448         int bite = 0;
1449
1450         if (via[B] & TREQ) {
1451                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1452                 out_8(&via[IFR], SR_INT);
1453                 return NULL;
1454         }
1455         /* The ack may not yet be low when we get the interrupt */
1456         while ((in_8(&via[B]) & TACK) != 0)
1457                         ;
1458
1459         /* if reading grab the byte, and reset the interrupt */
1460         if (pmu_state == reading || pmu_state == reading_intr)
1461                 bite = in_8(&via[SR]);
1462
1463         /* reset TREQ and wait for TACK to go high */
1464         out_8(&via[B], in_8(&via[B]) | TREQ);
1465         wait_for_ack();
1466
1467         switch (pmu_state) {
1468         case sending:
1469                 req = current_req;
1470                 if (data_len < 0) {
1471                         data_len = req->nbytes - 1;
1472                         send_byte(data_len);
1473                         break;
1474                 }
1475                 if (data_index <= data_len) {
1476                         send_byte(req->data[data_index++]);
1477                         break;
1478                 }
1479                 req->sent = 1;
1480                 data_len = pmu_data_len[req->data[0]][1];
1481                 if (data_len == 0) {
1482                         pmu_state = idle;
1483                         current_req = req->next;
1484                         if (req->reply_expected)
1485                                 req_awaiting_reply = req;
1486                         else
1487                                 return req;
1488                 } else {
1489                         pmu_state = reading;
1490                         data_index = 0;
1491                         reply_ptr = req->reply + req->reply_len;
1492                         recv_byte();
1493                 }
1494                 break;
1495
1496         case intack:
1497                 data_index = 0;
1498                 data_len = -1;
1499                 pmu_state = reading_intr;
1500                 reply_ptr = interrupt_data[int_data_last];
1501                 recv_byte();
1502                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1503                         enable_irq(gpio_irq);
1504                         gpio_irq_enabled = 1;
1505                 }
1506                 break;
1507
1508         case reading:
1509         case reading_intr:
1510                 if (data_len == -1) {
1511                         data_len = bite;
1512                         if (bite > 32)
1513                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1514                 } else if (data_index < 32) {
1515                         reply_ptr[data_index++] = bite;
1516                 }
1517                 if (data_index < data_len) {
1518                         recv_byte();
1519                         break;
1520                 }
1521
1522                 if (pmu_state == reading_intr) {
1523                         pmu_state = idle;
1524                         int_data_state[int_data_last] = int_data_ready;
1525                         interrupt_data_len[int_data_last] = data_len;
1526                 } else {
1527                         req = current_req;
1528                         /*
1529                          * For PMU sleep and freq change requests, we lock the
1530                          * PMU until it's explicitely unlocked. This avoids any
1531                          * spurrious event polling getting in
1532                          */
1533                         current_req = req->next;
1534                         req->reply_len += data_index;
1535                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1536                                 pmu_state = locked;
1537                         else
1538                                 pmu_state = idle;
1539                         return req;
1540                 }
1541                 break;
1542
1543         default:
1544                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1545                        pmu_state);
1546         }
1547         return NULL;
1548 }
1549
1550 static irqreturn_t
1551 via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs)
1552 {
1553         unsigned long flags;
1554         int intr;
1555         int nloop = 0;
1556         int int_data = -1;
1557         struct adb_request *req = NULL;
1558         int handled = 0;
1559
1560         /* This is a bit brutal, we can probably do better */
1561         spin_lock_irqsave(&pmu_lock, flags);
1562         ++disable_poll;
1563
1564         for (;;) {
1565                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1566                 if (intr == 0)
1567                         break;
1568                 handled = 1;
1569                 if (++nloop > 1000) {
1570                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1571                                "intr=%x, ier=%x pmu_state=%d\n",
1572                                intr, in_8(&via[IER]), pmu_state);
1573                         break;
1574                 }
1575                 out_8(&via[IFR], intr);
1576                 if (intr & CB1_INT) {
1577                         adb_int_pending = 1;
1578                         pmu_irq_stats[0]++;
1579                 }
1580                 if (intr & SR_INT) {
1581                         req = pmu_sr_intr(regs);
1582                         if (req)
1583                                 break;
1584                 }
1585         }
1586
1587 recheck:
1588         if (pmu_state == idle) {
1589                 if (adb_int_pending) {
1590                         if (int_data_state[0] == int_data_empty)
1591                                 int_data_last = 0;
1592                         else if (int_data_state[1] == int_data_empty)
1593                                 int_data_last = 1;
1594                         else
1595                                 goto no_free_slot;
1596                         pmu_state = intack;
1597                         int_data_state[int_data_last] = int_data_fill;
1598                         /* Sounds safer to make sure ACK is high before writing.
1599                          * This helped kill a problem with ADB and some iBooks
1600                          */
1601                         wait_for_ack();
1602                         send_byte(PMU_INT_ACK);
1603                         adb_int_pending = 0;
1604                 } else if (current_req)
1605                         pmu_start();
1606         }
1607 no_free_slot:
1608         /* Mark the oldest buffer for flushing */
1609         if (int_data_state[!int_data_last] == int_data_ready) {
1610                 int_data_state[!int_data_last] = int_data_flush;
1611                 int_data = !int_data_last;
1612         } else if (int_data_state[int_data_last] == int_data_ready) {
1613                 int_data_state[int_data_last] = int_data_flush;
1614                 int_data = int_data_last;
1615         }
1616         --disable_poll;
1617         spin_unlock_irqrestore(&pmu_lock, flags);
1618
1619         /* Deal with completed PMU requests outside of the lock */
1620         if (req) {
1621                 pmu_done(req);
1622                 req = NULL;
1623         }
1624
1625         /* Deal with interrupt datas outside of the lock */
1626         if (int_data >= 0) {
1627                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs);
1628                 spin_lock_irqsave(&pmu_lock, flags);
1629                 ++disable_poll;
1630                 int_data_state[int_data] = int_data_empty;
1631                 int_data = -1;
1632                 goto recheck;
1633         }
1634
1635         return IRQ_RETVAL(handled);
1636 }
1637
1638 void
1639 pmu_unlock(void)
1640 {
1641         unsigned long flags;
1642
1643         spin_lock_irqsave(&pmu_lock, flags);
1644         if (pmu_state == locked)
1645                 pmu_state = idle;
1646         adb_int_pending = 1;
1647         spin_unlock_irqrestore(&pmu_lock, flags);
1648 }
1649
1650
1651 static irqreturn_t
1652 gpio1_interrupt(int irq, void *arg, struct pt_regs *regs)
1653 {
1654         unsigned long flags;
1655
1656         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1657                 spin_lock_irqsave(&pmu_lock, flags);
1658                 if (gpio_irq_enabled > 0) {
1659                         disable_irq_nosync(gpio_irq);
1660                         gpio_irq_enabled = 0;
1661                 }
1662                 pmu_irq_stats[1]++;
1663                 adb_int_pending = 1;
1664                 spin_unlock_irqrestore(&pmu_lock, flags);
1665                 via_pmu_interrupt(0, NULL, NULL);
1666                 return IRQ_HANDLED;
1667         }
1668         return IRQ_NONE;
1669 }
1670
1671 void
1672 pmu_enable_irled(int on)
1673 {
1674         struct adb_request req;
1675
1676         if (vias == NULL)
1677                 return ;
1678         if (pmu_kind == PMU_KEYLARGO_BASED)
1679                 return ;
1680
1681         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1682             (on ? PMU_POW_ON : PMU_POW_OFF));
1683         pmu_wait_complete(&req);
1684 }
1685
1686 void
1687 pmu_restart(void)
1688 {
1689         struct adb_request req;
1690
1691         if (via == NULL)
1692                 return;
1693
1694         local_irq_disable();
1695
1696         drop_interrupts = 1;
1697
1698         if (pmu_kind != PMU_KEYLARGO_BASED) {
1699                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1700                                                 PMU_INT_TICK );
1701                 while(!req.complete)
1702                         pmu_poll();
1703         }
1704
1705         pmu_request(&req, NULL, 1, PMU_RESET);
1706         pmu_wait_complete(&req);
1707         for (;;)
1708                 ;
1709 }
1710
1711 void
1712 pmu_shutdown(void)
1713 {
1714         struct adb_request req;
1715
1716         if (via == NULL)
1717                 return;
1718
1719         local_irq_disable();
1720
1721         drop_interrupts = 1;
1722
1723         if (pmu_kind != PMU_KEYLARGO_BASED) {
1724                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1725                                                 PMU_INT_TICK );
1726                 pmu_wait_complete(&req);
1727         } else {
1728                 /* Disable server mode on shutdown or we'll just
1729                  * wake up again
1730                  */
1731                 pmu_set_server_mode(0);
1732         }
1733
1734         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1735                     'M', 'A', 'T', 'T');
1736         pmu_wait_complete(&req);
1737         for (;;)
1738                 ;
1739 }
1740
1741 int
1742 pmu_present(void)
1743 {
1744         return via != 0;
1745 }
1746
1747 #ifdef CONFIG_PM
1748
1749 static LIST_HEAD(sleep_notifiers);
1750
1751 int
1752 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
1753 {
1754         struct list_head *list;
1755         struct pmu_sleep_notifier *notifier;
1756
1757         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1758              list = list->next) {
1759                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1760                 if (n->priority > notifier->priority)
1761                         break;
1762         }
1763         __list_add(&n->list, list->prev, list);
1764         return 0;
1765 }
1766 EXPORT_SYMBOL(pmu_register_sleep_notifier);
1767
1768 int
1769 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
1770 {
1771         if (n->list.next == 0)
1772                 return -ENOENT;
1773         list_del(&n->list);
1774         n->list.next = NULL;
1775         return 0;
1776 }
1777 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
1778 #endif /* CONFIG_PM */
1779
1780 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1781
1782 /* Sleep is broadcast last-to-first */
1783 static int
1784 broadcast_sleep(int when, int fallback)
1785 {
1786         int ret = PBOOK_SLEEP_OK;
1787         struct list_head *list;
1788         struct pmu_sleep_notifier *notifier;
1789
1790         for (list = sleep_notifiers.prev; list != &sleep_notifiers;
1791              list = list->prev) {
1792                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1793                 ret = notifier->notifier_call(notifier, when);
1794                 if (ret != PBOOK_SLEEP_OK) {
1795                         printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
1796                                when, notifier, notifier->notifier_call);
1797                         for (; list != &sleep_notifiers; list = list->next) {
1798                                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1799                                 notifier->notifier_call(notifier, fallback);
1800                         }
1801                         return ret;
1802                 }
1803         }
1804         return ret;
1805 }
1806
1807 /* Wake is broadcast first-to-last */
1808 static int
1809 broadcast_wake(void)
1810 {
1811         int ret = PBOOK_SLEEP_OK;
1812         struct list_head *list;
1813         struct pmu_sleep_notifier *notifier;
1814
1815         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1816              list = list->next) {
1817                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1818                 notifier->notifier_call(notifier, PBOOK_WAKE);
1819         }
1820         return ret;
1821 }
1822
1823 /*
1824  * This struct is used to store config register values for
1825  * PCI devices which may get powered off when we sleep.
1826  */
1827 static struct pci_save {
1828 #ifndef HACKED_PCI_SAVE
1829         u16     command;
1830         u16     cache_lat;
1831         u16     intr;
1832         u32     rom_address;
1833 #else
1834         u32     config[16];
1835 #endif
1836 } *pbook_pci_saves;
1837 static int pbook_npci_saves;
1838
1839 static void
1840 pbook_alloc_pci_save(void)
1841 {
1842         int npci;
1843         struct pci_dev *pd = NULL;
1844
1845         npci = 0;
1846         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1847                 ++npci;
1848         }
1849         if (npci == 0)
1850                 return;
1851         pbook_pci_saves = (struct pci_save *)
1852                 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
1853         pbook_npci_saves = npci;
1854 }
1855
1856 static void
1857 pbook_free_pci_save(void)
1858 {
1859         if (pbook_pci_saves == NULL)
1860                 return;
1861         kfree(pbook_pci_saves);
1862         pbook_pci_saves = NULL;
1863         pbook_npci_saves = 0;
1864 }
1865
1866 static void
1867 pbook_pci_save(void)
1868 {
1869         struct pci_save *ps = pbook_pci_saves;
1870         struct pci_dev *pd = NULL;
1871         int npci = pbook_npci_saves;
1872
1873         if (ps == NULL)
1874                 return;
1875
1876         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1877                 if (npci-- == 0)
1878                         return;
1879 #ifndef HACKED_PCI_SAVE
1880                 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
1881                 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
1882                 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
1883                 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
1884 #else
1885                 int i;
1886                 for (i=1;i<16;i++)
1887                         pci_read_config_dword(pd, i<<4, &ps->config[i]);
1888 #endif
1889                 ++ps;
1890         }
1891 }
1892
1893 /* For this to work, we must take care of a few things: If gmac was enabled
1894  * during boot, it will be in the pci dev list. If it's disabled at this point
1895  * (and it will probably be), then you can't access it's config space.
1896  */
1897 static void
1898 pbook_pci_restore(void)
1899 {
1900         u16 cmd;
1901         struct pci_save *ps = pbook_pci_saves - 1;
1902         struct pci_dev *pd = NULL;
1903         int npci = pbook_npci_saves;
1904         int j;
1905
1906         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1907 #ifdef HACKED_PCI_SAVE
1908                 int i;
1909                 if (npci-- == 0)
1910                         return;
1911                 ps++;
1912                 for (i=2;i<16;i++)
1913                         pci_write_config_dword(pd, i<<4, ps->config[i]);
1914                 pci_write_config_dword(pd, 4, ps->config[1]);
1915 #else
1916                 if (npci-- == 0)
1917                         return;
1918                 ps++;
1919                 if (ps->command == 0)
1920                         continue;
1921                 pci_read_config_word(pd, PCI_COMMAND, &cmd);
1922                 if ((ps->command & ~cmd) == 0)
1923                         continue;
1924                 switch (pd->hdr_type) {
1925                 case PCI_HEADER_TYPE_NORMAL:
1926                         for (j = 0; j < 6; ++j)
1927                                 pci_write_config_dword(pd,
1928                                         PCI_BASE_ADDRESS_0 + j*4,
1929                                         pd->resource[j].start);
1930                         pci_write_config_dword(pd, PCI_ROM_ADDRESS,
1931                                 ps->rom_address);
1932                         pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
1933                                 ps->cache_lat);
1934                         pci_write_config_word(pd, PCI_INTERRUPT_LINE,
1935                                 ps->intr);
1936                         pci_write_config_word(pd, PCI_COMMAND, ps->command);
1937                         break;
1938                 }
1939 #endif
1940         }
1941 }
1942
1943 #ifdef DEBUG_SLEEP
1944 /* N.B. This doesn't work on the 3400 */
1945 void
1946 pmu_blink(int n)
1947 {
1948         struct adb_request req;
1949
1950         memset(&req, 0, sizeof(req));
1951
1952         for (; n > 0; --n) {
1953                 req.nbytes = 4;
1954                 req.done = NULL;
1955                 req.data[0] = 0xee;
1956                 req.data[1] = 4;
1957                 req.data[2] = 0;
1958                 req.data[3] = 1;
1959                 req.reply[0] = ADB_RET_OK;
1960                 req.reply_len = 1;
1961                 req.reply_expected = 0;
1962                 pmu_polled_request(&req);
1963                 mdelay(50);
1964                 req.nbytes = 4;
1965                 req.done = NULL;
1966                 req.data[0] = 0xee;
1967                 req.data[1] = 4;
1968                 req.data[2] = 0;
1969                 req.data[3] = 0;
1970                 req.reply[0] = ADB_RET_OK;
1971                 req.reply_len = 1;
1972                 req.reply_expected = 0;
1973                 pmu_polled_request(&req);
1974                 mdelay(50);
1975         }
1976         mdelay(50);
1977 }
1978 #endif
1979
1980 /*
1981  * Put the powerbook to sleep.
1982  */
1983
1984 static u32 save_via[8];
1985
1986 static void
1987 save_via_state(void)
1988 {
1989         save_via[0] = in_8(&via[ANH]);
1990         save_via[1] = in_8(&via[DIRA]);
1991         save_via[2] = in_8(&via[B]);
1992         save_via[3] = in_8(&via[DIRB]);
1993         save_via[4] = in_8(&via[PCR]);
1994         save_via[5] = in_8(&via[ACR]);
1995         save_via[6] = in_8(&via[T1CL]);
1996         save_via[7] = in_8(&via[T1CH]);
1997 }
1998 static void
1999 restore_via_state(void)
2000 {
2001         out_8(&via[ANH], save_via[0]);
2002         out_8(&via[DIRA], save_via[1]);
2003         out_8(&via[B], save_via[2]);
2004         out_8(&via[DIRB], save_via[3]);
2005         out_8(&via[PCR], save_via[4]);
2006         out_8(&via[ACR], save_via[5]);
2007         out_8(&via[T1CL], save_via[6]);
2008         out_8(&via[T1CH], save_via[7]);
2009         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
2010         out_8(&via[IFR], 0x7f);                         /* clear IFR */
2011         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
2012 }
2013
2014 static int
2015 pmac_suspend_devices(void)
2016 {
2017         int ret;
2018
2019         pm_prepare_console();
2020
2021         /* Notify old-style device drivers & userland */
2022         ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
2023         if (ret != PBOOK_SLEEP_OK) {
2024                 printk(KERN_ERR "Sleep rejected by drivers\n");
2025                 return -EBUSY;
2026         }
2027
2028         /* Sync the disks. */
2029         /* XXX It would be nice to have some way to ensure that
2030          * nobody is dirtying any new buffers while we wait. That
2031          * could be achieved using the refrigerator for processes
2032          * that swsusp uses
2033          */
2034         sys_sync();
2035
2036         /* Sleep can fail now. May not be very robust but useful for debugging */
2037         ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
2038         if (ret != PBOOK_SLEEP_OK) {
2039                 printk(KERN_ERR "Driver sleep failed\n");
2040                 return -EBUSY;
2041         }
2042
2043         /* Send suspend call to devices, hold the device core's dpm_sem */
2044         ret = device_suspend(PMSG_SUSPEND);
2045         if (ret) {
2046                 broadcast_wake();
2047                 printk(KERN_ERR "Driver sleep failed\n");
2048                 return -EBUSY;
2049         }
2050
2051         /* Call platform functions marked "on sleep" */
2052         pmac_pfunc_i2c_suspend();
2053         pmac_pfunc_base_suspend();
2054
2055         /* Stop preemption */
2056         preempt_disable();
2057
2058         /* Make sure the decrementer won't interrupt us */
2059         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2060         /* Make sure any pending DEC interrupt occurring while we did
2061          * the above didn't re-enable the DEC */
2062         mb();
2063         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2064
2065         /* We can now disable MSR_EE. This code of course works properly only
2066          * on UP machines... For SMP, if we ever implement sleep, we'll have to
2067          * stop the "other" CPUs way before we do all that stuff.
2068          */
2069         local_irq_disable();
2070
2071         /* Broadcast power down irq
2072          * This isn't that useful in most cases (only directly wired devices can
2073          * use this but still... This will take care of sysdev's as well, so
2074          * we exit from here with local irqs disabled and PIC off.
2075          */
2076         ret = device_power_down(PMSG_SUSPEND);
2077         if (ret) {
2078                 wakeup_decrementer();
2079                 local_irq_enable();
2080                 preempt_enable();
2081                 device_resume();
2082                 broadcast_wake();
2083                 printk(KERN_ERR "Driver powerdown failed\n");
2084                 return -EBUSY;
2085         }
2086
2087         /* Wait for completion of async requests */
2088         while (!batt_req.complete)
2089                 pmu_poll();
2090
2091         /* Giveup the lazy FPU & vec so we don't have to back them
2092          * up from the low level code
2093          */
2094         enable_kernel_fp();
2095
2096 #ifdef CONFIG_ALTIVEC
2097         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2098                 enable_kernel_altivec();
2099 #endif /* CONFIG_ALTIVEC */
2100
2101         return 0;
2102 }
2103
2104 static int
2105 pmac_wakeup_devices(void)
2106 {
2107         mdelay(100);
2108
2109         /* Power back up system devices (including the PIC) */
2110         device_power_up();
2111
2112         /* Force a poll of ADB interrupts */
2113         adb_int_pending = 1;
2114         via_pmu_interrupt(0, NULL, NULL);
2115
2116         /* Restart jiffies & scheduling */
2117         wakeup_decrementer();
2118
2119         /* Re-enable local CPU interrupts */
2120         local_irq_enable();
2121         mdelay(10);
2122         preempt_enable();
2123
2124         /* Call platform functions marked "on wake" */
2125         pmac_pfunc_base_resume();
2126         pmac_pfunc_i2c_resume();
2127
2128         /* Resume devices */
2129         device_resume();
2130
2131         /* Notify old style drivers */
2132         broadcast_wake();
2133
2134         pm_restore_console();
2135
2136         return 0;
2137 }
2138
2139 #define GRACKLE_PM      (1<<7)
2140 #define GRACKLE_DOZE    (1<<5)
2141 #define GRACKLE_NAP     (1<<4)
2142 #define GRACKLE_SLEEP   (1<<3)
2143
2144 static int powerbook_sleep_grackle(void)
2145 {
2146         unsigned long save_l2cr;
2147         unsigned short pmcr1;
2148         struct adb_request req;
2149         int ret;
2150         struct pci_dev *grackle;
2151
2152         grackle = pci_find_slot(0, 0);
2153         if (!grackle)
2154                 return -ENODEV;
2155
2156         ret = pmac_suspend_devices();
2157         if (ret) {
2158                 printk(KERN_ERR "Sleep rejected by devices\n");
2159                 return ret;
2160         }
2161
2162         /* Turn off various things. Darwin does some retry tests here... */
2163         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2164         pmu_wait_complete(&req);
2165         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2166                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2167         pmu_wait_complete(&req);
2168
2169         /* For 750, save backside cache setting and disable it */
2170         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2171
2172         if (!__fake_sleep) {
2173                 /* Ask the PMU to put us to sleep */
2174                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2175                 pmu_wait_complete(&req);
2176         }
2177
2178         /* The VIA is supposed not to be restored correctly*/
2179         save_via_state();
2180         /* We shut down some HW */
2181         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2182
2183         pci_read_config_word(grackle, 0x70, &pmcr1);
2184         /* Apparently, MacOS uses NAP mode for Grackle ??? */
2185         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2186         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2187         pci_write_config_word(grackle, 0x70, pmcr1);
2188
2189         /* Call low-level ASM sleep handler */
2190         if (__fake_sleep)
2191                 mdelay(5000);
2192         else
2193                 low_sleep_handler();
2194
2195         /* We're awake again, stop grackle PM */
2196         pci_read_config_word(grackle, 0x70, &pmcr1);
2197         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2198         pci_write_config_word(grackle, 0x70, pmcr1);
2199
2200         /* Make sure the PMU is idle */
2201         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2202         restore_via_state();
2203
2204         /* Restore L2 cache */
2205         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2206                 _set_L2CR(save_l2cr);
2207
2208         /* Restore userland MMU context */
2209         set_context(current->active_mm->context.id, current->active_mm->pgd);
2210
2211         /* Power things up */
2212         pmu_unlock();
2213         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2214         pmu_wait_complete(&req);
2215         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2216                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2217         pmu_wait_complete(&req);
2218         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2219                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2220         pmu_wait_complete(&req);
2221
2222         pmac_wakeup_devices();
2223
2224         return 0;
2225 }
2226
2227 static int
2228 powerbook_sleep_Core99(void)
2229 {
2230         unsigned long save_l2cr;
2231         unsigned long save_l3cr;
2232         struct adb_request req;
2233         int ret;
2234
2235         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2236                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2237                 return -ENOSYS;
2238         }
2239
2240         if (num_online_cpus() > 1 || cpu_is_offline(0))
2241                 return -EAGAIN;
2242
2243         ret = pmac_suspend_devices();
2244         if (ret) {
2245                 printk(KERN_ERR "Sleep rejected by devices\n");
2246                 return ret;
2247         }
2248
2249         /* Stop environment and ADB interrupts */
2250         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2251         pmu_wait_complete(&req);
2252
2253         /* Tell PMU what events will wake us up */
2254         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2255                 0xff, 0xff);
2256         pmu_wait_complete(&req);
2257         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2258                 0, PMU_PWR_WAKEUP_KEY |
2259                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2260         pmu_wait_complete(&req);
2261
2262         /* Save the state of the L2 and L3 caches */
2263         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
2264         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2265
2266         if (!__fake_sleep) {
2267                 /* Ask the PMU to put us to sleep */
2268                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2269                 pmu_wait_complete(&req);
2270         }
2271
2272         /* The VIA is supposed not to be restored correctly*/
2273         save_via_state();
2274
2275         /* Shut down various ASICs. There's a chance that we can no longer
2276          * talk to the PMU after this, so I moved it to _after_ sending the
2277          * sleep command to it. Still need to be checked.
2278          */
2279         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2280
2281         /* Call low-level ASM sleep handler */
2282         if (__fake_sleep)
2283                 mdelay(5000);
2284         else
2285                 low_sleep_handler();
2286
2287         /* Restore Apple core ASICs state */
2288         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2289
2290         /* Restore VIA */
2291         restore_via_state();
2292
2293         /* tweak LPJ before cpufreq is there */
2294         loops_per_jiffy *= 2;
2295
2296         /* Restore video */
2297         pmac_call_early_video_resume();
2298
2299         /* Restore L2 cache */
2300         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2301                 _set_L2CR(save_l2cr);
2302         /* Restore L3 cache */
2303         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2304                 _set_L3CR(save_l3cr);
2305
2306         /* Restore userland MMU context */
2307         set_context(current->active_mm->context.id, current->active_mm->pgd);
2308
2309         /* Tell PMU we are ready */
2310         pmu_unlock();
2311         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2312         pmu_wait_complete(&req);
2313         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2314         pmu_wait_complete(&req);
2315
2316         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2317         loops_per_jiffy /= 2;
2318
2319         pmac_wakeup_devices();
2320
2321         return 0;
2322 }
2323
2324 #define PB3400_MEM_CTRL         0xf8000000
2325 #define PB3400_MEM_CTRL_SLEEP   0x70
2326
2327 static int
2328 powerbook_sleep_3400(void)
2329 {
2330         int ret, i, x;
2331         unsigned int hid0;
2332         unsigned long p;
2333         struct adb_request sleep_req;
2334         void __iomem *mem_ctrl;
2335         unsigned int __iomem *mem_ctrl_sleep;
2336
2337         /* first map in the memory controller registers */
2338         mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2339         if (mem_ctrl == NULL) {
2340                 printk("powerbook_sleep_3400: ioremap failed\n");
2341                 return -ENOMEM;
2342         }
2343         mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2344
2345         /* Allocate room for PCI save */
2346         pbook_alloc_pci_save();
2347
2348         ret = pmac_suspend_devices();
2349         if (ret) {
2350                 pbook_free_pci_save();
2351                 printk(KERN_ERR "Sleep rejected by devices\n");
2352                 return ret;
2353         }
2354
2355         /* Save the state of PCI config space for some slots */
2356         pbook_pci_save();
2357
2358         /* Set the memory controller to keep the memory refreshed
2359            while we're asleep */
2360         for (i = 0x403f; i >= 0x4000; --i) {
2361                 out_be32(mem_ctrl_sleep, i);
2362                 do {
2363                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2364                 } while (x == 0);
2365                 if (x >= 0x100)
2366                         break;
2367         }
2368
2369         /* Ask the PMU to put us to sleep */
2370         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2371         while (!sleep_req.complete)
2372                 mb();
2373
2374         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2375
2376         /* displacement-flush the L2 cache - necessary? */
2377         for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2378                 i = *(volatile int *)p;
2379         asleep = 1;
2380
2381         /* Put the CPU into sleep mode */
2382         hid0 = mfspr(SPRN_HID0);
2383         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2384         mtspr(SPRN_HID0, hid0);
2385         mtmsr(mfmsr() | MSR_POW | MSR_EE);
2386         udelay(10);
2387
2388         /* OK, we're awake again, start restoring things */
2389         out_be32(mem_ctrl_sleep, 0x3f);
2390         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2391         pbook_pci_restore();
2392         pmu_unlock();
2393
2394         /* wait for the PMU interrupt sequence to complete */
2395         while (asleep)
2396                 mb();
2397
2398         pmac_wakeup_devices();
2399         pbook_free_pci_save();
2400         iounmap(mem_ctrl);
2401
2402         return 0;
2403 }
2404
2405 #endif /* CONFIG_PM && CONFIG_PPC32 */
2406
2407 /*
2408  * Support for /dev/pmu device
2409  */
2410 #define RB_SIZE         0x10
2411 struct pmu_private {
2412         struct list_head list;
2413         int     rb_get;
2414         int     rb_put;
2415         struct rb_entry {
2416                 unsigned short len;
2417                 unsigned char data[16];
2418         }       rb_buf[RB_SIZE];
2419         wait_queue_head_t wait;
2420         spinlock_t lock;
2421 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2422         int     backlight_locker;
2423 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2424 };
2425
2426 static LIST_HEAD(all_pmu_pvt);
2427 static DEFINE_SPINLOCK(all_pvt_lock);
2428
2429 static void
2430 pmu_pass_intr(unsigned char *data, int len)
2431 {
2432         struct pmu_private *pp;
2433         struct list_head *list;
2434         int i;
2435         unsigned long flags;
2436
2437         if (len > sizeof(pp->rb_buf[0].data))
2438                 len = sizeof(pp->rb_buf[0].data);
2439         spin_lock_irqsave(&all_pvt_lock, flags);
2440         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2441                 pp = list_entry(list, struct pmu_private, list);
2442                 spin_lock(&pp->lock);
2443                 i = pp->rb_put + 1;
2444                 if (i >= RB_SIZE)
2445                         i = 0;
2446                 if (i != pp->rb_get) {
2447                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2448                         rp->len = len;
2449                         memcpy(rp->data, data, len);
2450                         pp->rb_put = i;
2451                         wake_up_interruptible(&pp->wait);
2452                 }
2453                 spin_unlock(&pp->lock);
2454         }
2455         spin_unlock_irqrestore(&all_pvt_lock, flags);
2456 }
2457
2458 static int
2459 pmu_open(struct inode *inode, struct file *file)
2460 {
2461         struct pmu_private *pp;
2462         unsigned long flags;
2463
2464         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2465         if (pp == 0)
2466                 return -ENOMEM;
2467         pp->rb_get = pp->rb_put = 0;
2468         spin_lock_init(&pp->lock);
2469         init_waitqueue_head(&pp->wait);
2470         spin_lock_irqsave(&all_pvt_lock, flags);
2471 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2472         pp->backlight_locker = 0;
2473 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2474         list_add(&pp->list, &all_pmu_pvt);
2475         spin_unlock_irqrestore(&all_pvt_lock, flags);
2476         file->private_data = pp;
2477         return 0;
2478 }
2479
2480 static ssize_t
2481 pmu_read(struct file *file, char __user *buf,
2482                         size_t count, loff_t *ppos)
2483 {
2484         struct pmu_private *pp = file->private_data;
2485         DECLARE_WAITQUEUE(wait, current);
2486         unsigned long flags;
2487         int ret = 0;
2488
2489         if (count < 1 || pp == 0)
2490                 return -EINVAL;
2491         if (!access_ok(VERIFY_WRITE, buf, count))
2492                 return -EFAULT;
2493
2494         spin_lock_irqsave(&pp->lock, flags);
2495         add_wait_queue(&pp->wait, &wait);
2496         current->state = TASK_INTERRUPTIBLE;
2497
2498         for (;;) {
2499                 ret = -EAGAIN;
2500                 if (pp->rb_get != pp->rb_put) {
2501                         int i = pp->rb_get;
2502                         struct rb_entry *rp = &pp->rb_buf[i];
2503                         ret = rp->len;
2504                         spin_unlock_irqrestore(&pp->lock, flags);
2505                         if (ret > count)
2506                                 ret = count;
2507                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2508                                 ret = -EFAULT;
2509                         if (++i >= RB_SIZE)
2510                                 i = 0;
2511                         spin_lock_irqsave(&pp->lock, flags);
2512                         pp->rb_get = i;
2513                 }
2514                 if (ret >= 0)
2515                         break;
2516                 if (file->f_flags & O_NONBLOCK)
2517                         break;
2518                 ret = -ERESTARTSYS;
2519                 if (signal_pending(current))
2520                         break;
2521                 spin_unlock_irqrestore(&pp->lock, flags);
2522                 schedule();
2523                 spin_lock_irqsave(&pp->lock, flags);
2524         }
2525         current->state = TASK_RUNNING;
2526         remove_wait_queue(&pp->wait, &wait);
2527         spin_unlock_irqrestore(&pp->lock, flags);
2528
2529         return ret;
2530 }
2531
2532 static ssize_t
2533 pmu_write(struct file *file, const char __user *buf,
2534                          size_t count, loff_t *ppos)
2535 {
2536         return 0;
2537 }
2538
2539 static unsigned int
2540 pmu_fpoll(struct file *filp, poll_table *wait)
2541 {
2542         struct pmu_private *pp = filp->private_data;
2543         unsigned int mask = 0;
2544         unsigned long flags;
2545
2546         if (pp == 0)
2547                 return 0;
2548         poll_wait(filp, &pp->wait, wait);
2549         spin_lock_irqsave(&pp->lock, flags);
2550         if (pp->rb_get != pp->rb_put)
2551                 mask |= POLLIN;
2552         spin_unlock_irqrestore(&pp->lock, flags);
2553         return mask;
2554 }
2555
2556 static int
2557 pmu_release(struct inode *inode, struct file *file)
2558 {
2559         struct pmu_private *pp = file->private_data;
2560         unsigned long flags;
2561
2562         lock_kernel();
2563         if (pp != 0) {
2564                 file->private_data = NULL;
2565                 spin_lock_irqsave(&all_pvt_lock, flags);
2566                 list_del(&pp->list);
2567                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2568 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2569                 if (pp->backlight_locker) {
2570                         spin_lock_irqsave(&pmu_lock, flags);
2571                         disable_kernel_backlight--;
2572                         spin_unlock_irqrestore(&pmu_lock, flags);
2573                 }
2574 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2575                 kfree(pp);
2576         }
2577         unlock_kernel();
2578         return 0;
2579 }
2580
2581 static int
2582 pmu_ioctl(struct inode * inode, struct file *filp,
2583                      u_int cmd, u_long arg)
2584 {
2585         __u32 __user *argp = (__u32 __user *)arg;
2586         int error = -EINVAL;
2587
2588         switch (cmd) {
2589 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2590         case PMU_IOC_SLEEP:
2591                 if (!capable(CAP_SYS_ADMIN))
2592                         return -EACCES;
2593                 if (sleep_in_progress)
2594                         return -EBUSY;
2595                 sleep_in_progress = 1;
2596                 switch (pmu_kind) {
2597                 case PMU_OHARE_BASED:
2598                         error = powerbook_sleep_3400();
2599                         break;
2600                 case PMU_HEATHROW_BASED:
2601                 case PMU_PADDINGTON_BASED:
2602                         error = powerbook_sleep_grackle();
2603                         break;
2604                 case PMU_KEYLARGO_BASED:
2605                         error = powerbook_sleep_Core99();
2606                         break;
2607                 default:
2608                         error = -ENOSYS;
2609                 }
2610                 sleep_in_progress = 0;
2611                 break;
2612         case PMU_IOC_CAN_SLEEP:
2613                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2614                         return put_user(0, argp);
2615                 else
2616                         return put_user(1, argp);
2617 #endif /* CONFIG_PM && CONFIG_PPC32 */
2618
2619 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2620         /* Compatibility ioctl's for backlight */
2621         case PMU_IOC_GET_BACKLIGHT:
2622         {
2623                 int brightness;
2624
2625                 if (sleep_in_progress)
2626                         return -EBUSY;
2627
2628                 brightness = pmac_backlight_get_legacy_brightness();
2629                 if (brightness < 0)
2630                         return brightness;
2631                 else
2632                         return put_user(brightness, argp);
2633
2634         }
2635         case PMU_IOC_SET_BACKLIGHT:
2636         {
2637                 int brightness;
2638
2639                 if (sleep_in_progress)
2640                         return -EBUSY;
2641
2642                 error = get_user(brightness, argp);
2643                 if (error)
2644                         return error;
2645
2646                 return pmac_backlight_set_legacy_brightness(brightness);
2647         }
2648 #ifdef CONFIG_INPUT_ADBHID
2649         case PMU_IOC_GRAB_BACKLIGHT: {
2650                 struct pmu_private *pp = filp->private_data;
2651                 unsigned long flags;
2652
2653                 if (pp->backlight_locker)
2654                         return 0;
2655                 pp->backlight_locker = 1;
2656                 spin_lock_irqsave(&pmu_lock, flags);
2657                 disable_kernel_backlight++;
2658                 spin_unlock_irqrestore(&pmu_lock, flags);
2659                 return 0;
2660         }
2661 #endif /* CONFIG_INPUT_ADBHID */
2662 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2663         case PMU_IOC_GET_MODEL:
2664                 return put_user(pmu_kind, argp);
2665         case PMU_IOC_HAS_ADB:
2666                 return put_user(pmu_has_adb, argp);
2667         }
2668         return error;
2669 }
2670
2671 static struct file_operations pmu_device_fops = {
2672         .read           = pmu_read,
2673         .write          = pmu_write,
2674         .poll           = pmu_fpoll,
2675         .ioctl          = pmu_ioctl,
2676         .open           = pmu_open,
2677         .release        = pmu_release,
2678 };
2679
2680 static struct miscdevice pmu_device = {
2681         PMU_MINOR, "pmu", &pmu_device_fops
2682 };
2683
2684 static int pmu_device_init(void)
2685 {
2686         if (!via)
2687                 return 0;
2688         if (misc_register(&pmu_device) < 0)
2689                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2690         return 0;
2691 }
2692 device_initcall(pmu_device_init);
2693
2694
2695 #ifdef DEBUG_SLEEP
2696 static inline void
2697 polled_handshake(volatile unsigned char __iomem *via)
2698 {
2699         via[B] &= ~TREQ; eieio();
2700         while ((via[B] & TACK) != 0)
2701                 ;
2702         via[B] |= TREQ; eieio();
2703         while ((via[B] & TACK) == 0)
2704                 ;
2705 }
2706
2707 static inline void
2708 polled_send_byte(volatile unsigned char __iomem *via, int x)
2709 {
2710         via[ACR] |= SR_OUT | SR_EXT; eieio();
2711         via[SR] = x; eieio();
2712         polled_handshake(via);
2713 }
2714
2715 static inline int
2716 polled_recv_byte(volatile unsigned char __iomem *via)
2717 {
2718         int x;
2719
2720         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2721         x = via[SR]; eieio();
2722         polled_handshake(via);
2723         x = via[SR]; eieio();
2724         return x;
2725 }
2726
2727 int
2728 pmu_polled_request(struct adb_request *req)
2729 {
2730         unsigned long flags;
2731         int i, l, c;
2732         volatile unsigned char __iomem *v = via;
2733
2734         req->complete = 1;
2735         c = req->data[0];
2736         l = pmu_data_len[c][0];
2737         if (l >= 0 && req->nbytes != l + 1)
2738                 return -EINVAL;
2739
2740         local_irq_save(flags);
2741         while (pmu_state != idle)
2742                 pmu_poll();
2743
2744         while ((via[B] & TACK) == 0)
2745                 ;
2746         polled_send_byte(v, c);
2747         if (l < 0) {
2748                 l = req->nbytes - 1;
2749                 polled_send_byte(v, l);
2750         }
2751         for (i = 1; i <= l; ++i)
2752                 polled_send_byte(v, req->data[i]);
2753
2754         l = pmu_data_len[c][1];
2755         if (l < 0)
2756                 l = polled_recv_byte(v);
2757         for (i = 0; i < l; ++i)
2758                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2759
2760         if (req->done)
2761                 (*req->done)(req);
2762
2763         local_irq_restore(flags);
2764         return 0;
2765 }
2766 #endif /* DEBUG_SLEEP */
2767
2768
2769 /* FIXME: This is a temporary set of callbacks to enable us
2770  * to do suspend-to-disk.
2771  */
2772
2773 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2774
2775 static int pmu_sys_suspended = 0;
2776
2777 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2778 {
2779         if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2780                 return 0;
2781
2782         /* Suspend PMU event interrupts */
2783         pmu_suspend();
2784
2785         pmu_sys_suspended = 1;
2786         return 0;
2787 }
2788
2789 static int pmu_sys_resume(struct sys_device *sysdev)
2790 {
2791         struct adb_request req;
2792
2793         if (!pmu_sys_suspended)
2794                 return 0;
2795
2796         /* Tell PMU we are ready */
2797         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2798         pmu_wait_complete(&req);
2799
2800         /* Resume PMU event interrupts */
2801         pmu_resume();
2802
2803         pmu_sys_suspended = 0;
2804
2805         return 0;
2806 }
2807
2808 #endif /* CONFIG_PM && CONFIG_PPC32 */
2809
2810 static struct sysdev_class pmu_sysclass = {
2811         set_kset_name("pmu"),
2812 };
2813
2814 static struct sys_device device_pmu = {
2815         .id             = 0,
2816         .cls            = &pmu_sysclass,
2817 };
2818
2819 static struct sysdev_driver driver_pmu = {
2820 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2821         .suspend        = &pmu_sys_suspend,
2822         .resume         = &pmu_sys_resume,
2823 #endif /* CONFIG_PM && CONFIG_PPC32 */
2824 };
2825
2826 static int __init init_pmu_sysfs(void)
2827 {
2828         int rc;
2829
2830         rc = sysdev_class_register(&pmu_sysclass);
2831         if (rc) {
2832                 printk(KERN_ERR "Failed registering PMU sys class\n");
2833                 return -ENODEV;
2834         }
2835         rc = sysdev_register(&device_pmu);
2836         if (rc) {
2837                 printk(KERN_ERR "Failed registering PMU sys device\n");
2838                 return -ENODEV;
2839         }
2840         rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2841         if (rc) {
2842                 printk(KERN_ERR "Failed registering PMU sys driver\n");
2843                 return -ENODEV;
2844         }
2845         return 0;
2846 }
2847
2848 subsys_initcall(init_pmu_sysfs);
2849
2850 EXPORT_SYMBOL(pmu_request);
2851 EXPORT_SYMBOL(pmu_queue_request);
2852 EXPORT_SYMBOL(pmu_poll);
2853 EXPORT_SYMBOL(pmu_poll_adb);
2854 EXPORT_SYMBOL(pmu_wait_complete);
2855 EXPORT_SYMBOL(pmu_suspend);
2856 EXPORT_SYMBOL(pmu_resume);
2857 EXPORT_SYMBOL(pmu_unlock);
2858 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2859 EXPORT_SYMBOL(pmu_enable_irled);
2860 EXPORT_SYMBOL(pmu_battery_count);
2861 EXPORT_SYMBOL(pmu_batteries);
2862 EXPORT_SYMBOL(pmu_power_flags);
2863 #endif /* CONFIG_PM && CONFIG_PPC32 */
2864