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

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