drivers/macintosh/via-pmu.c

   1 /*
   2  * Device driver for the via-pmu on Apple Powermacs.
   3  *
   4  * The VIA (versatile interface adapter) interfaces to the PMU,
   5  * a 6805 microprocessor core whose primary function is to control
   6  * battery charging and system power on the PowerBook 3400 and 2400.
   7  * The PMU also controls the ADB (Apple Desktop Bus) which connects
   8  * to the keyboard and mouse, as well as the non-volatile RAM
   9  * and the RTC (real time clock) chip.
  10  *
  11  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
  12  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
  13  *
  14  * THIS DRIVER IS BECOMING A TOTAL MESS !
  15  *  - Cleanup atomically disabling reply to PMU events after
  16  *    a sleep or a freq. switch
  17  *  - Move sleep code out of here to pmac_pm, merge into new
  18  *    common PM infrastructure
  19  *  - Move backlight code out as well
  20  *  - Save/Restore PCI space properly
  21  *
  22  */
  23 #include <stdarg.h>
  24 #include <linux/config.h>
  25 #include <linux/types.h>
  26 #include <linux/errno.h>
  27 #include <linux/kernel.h>
  28 #include <linux/delay.h>
  29 #include <linux/sched.h>
  30 #include <linux/miscdevice.h>
  31 #include <linux/blkdev.h>
  32 #include <linux/pci.h>
  33 #include <linux/slab.h>
  34 #include <linux/poll.h>
  35 #include <linux/adb.h>
  36 #include <linux/pmu.h>
  37 #include <linux/cuda.h>
  38 #include <linux/smp_lock.h>
  39 #include <linux/module.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/pm.h>
  42 #include <linux/proc_fs.h>
  43 #include <linux/init.h>
  44 #include <linux/interrupt.h>
  45 #include <linux/device.h>
  46 #include <linux/sysdev.h>
  47 #include <linux/suspend.h>
  48 #include <linux/syscalls.h>
  49 #include <linux/cpu.h>
  50 #include <asm/prom.h>
  51 #include <asm/machdep.h>
  52 #include <asm/io.h>
  53 #include <asm/pgtable.h>
  54 #include <asm/system.h>
  55 #include <asm/sections.h>
  56 #include <asm/irq.h>
  57 #include <asm/pmac_feature.h>
  58 #include <asm/pmac_pfunc.h>
  59 #include <asm/pmac_low_i2c.h>
  60 #include <asm/uaccess.h>
  61 #include <asm/mmu_context.h>
  62 #include <asm/cputable.h>
  63 #include <asm/time.h>
  64 #ifdef CONFIG_PMAC_BACKLIGHT
  65 #include <asm/backlight.h>
  66 #endif
  67
  68 #ifdef CONFIG_PPC32
  69 #include <asm/open_pic.h>
  70 #endif
  71
  72 /* Some compile options */
  73 #undef SUSPEND_USES_PMU
  74 #define DEBUG_SLEEP
  75 #undef HACKED_PCI_SAVE
  76
  77 /* Misc minor number allocated for /dev/pmu */
  78 #define PMU_MINOR               154
  79
  80 /* How many iterations between battery polls */
  81 #define BATTERY_POLLING_COUNT   2
  82
  83 static volatile unsigned char __iomem *via;
  84
  85 /* VIA registers - spaced 0x200 bytes apart */
  86 #define RS              0x200           /* skip between registers */
  87 #define B               0               /* B-side data */
  88 #define A               RS              /* A-side data */
  89 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  90 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  91 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  92 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  93 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  94 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  95 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  96 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  97 #define SR              (10*RS)         /* Shift register */
  98 #define ACR             (11*RS)         /* Auxiliary control register */
  99 #define PCR             (12*RS)         /* Peripheral control register */
 100 #define IFR             (13*RS)         /* Interrupt flag register */
 101 #define IER             (14*RS)         /* Interrupt enable register */
 102 #define ANH             (15*RS)         /* A-side data, no handshake */
 103
 104 /* Bits in B data register: both active low */
 105 #define TACK            0x08            /* Transfer acknowledge (input) */
 106 #define TREQ            0x10            /* Transfer request (output) */
 107
 108 /* Bits in ACR */
 109 #define SR_CTRL         0x1c            /* Shift register control bits */
 110 #define SR_EXT          0x0c            /* Shift on external clock */
 111 #define SR_OUT          0x10            /* Shift out if 1 */
 112
 113 /* Bits in IFR and IER */
 114 #define IER_SET         0x80            /* set bits in IER */
 115 #define IER_CLR         0               /* clear bits in IER */
 116 #define SR_INT          0x04            /* Shift register full/empty */
 117 #define CB2_INT         0x08
 118 #define CB1_INT         0x10            /* transition on CB1 input */
 119
 120 static volatile enum pmu_state {
 121         idle,
 122         sending,
 123         intack,
 124         reading,
 125         reading_intr,
 126         locked,
 127 } pmu_state;
 128
 129 static volatile enum int_data_state {
 130         int_data_empty,
 131         int_data_fill,
 132         int_data_ready,
 133         int_data_flush
 134 } int_data_state[2] = { int_data_empty, int_data_empty };
 135
 136 static struct adb_request *current_req;
 137 static struct adb_request *last_req;
 138 static struct adb_request *req_awaiting_reply;
 139 static unsigned char interrupt_data[2][32];
 140 static int interrupt_data_len[2];
 141 static int int_data_last;
 142 static unsigned char *reply_ptr;
 143 static int data_index;
 144 static int data_len;
 145 static volatile int adb_int_pending;
 146 static volatile int disable_poll;
 147 static struct adb_request bright_req_1, bright_req_2;
 148 static struct device_node *vias;
 149 static int pmu_kind = PMU_UNKNOWN;
 150 static int pmu_fully_inited = 0;
 151 static int pmu_has_adb;
 152 static struct device_node *gpio_node;
 153 static unsigned char __iomem *gpio_reg = NULL;
 154 static int gpio_irq = -1;
 155 static int gpio_irq_enabled = -1;
 156 static volatile int pmu_suspended = 0;
 157 static spinlock_t pmu_lock;
 158 static u8 pmu_intr_mask;
 159 static int pmu_version;
 160 static int drop_interrupts;
 161 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 162 static int option_lid_wakeup = 1;
 163 #endif /* CONFIG_PM && CONFIG_PPC32 */
 164 #if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT)
 165 static int sleep_in_progress;
 166 #endif
 167 static unsigned long async_req_locks;
 168 static unsigned int pmu_irq_stats[11];
 169
 170 static struct proc_dir_entry *proc_pmu_root;
 171 static struct proc_dir_entry *proc_pmu_info;
 172 static struct proc_dir_entry *proc_pmu_irqstats;
 173 static struct proc_dir_entry *proc_pmu_options;
 174 static int option_server_mode;
 175
 176 int pmu_battery_count;
 177 int pmu_cur_battery;
 178 unsigned int pmu_power_flags;
 179 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 180 static int query_batt_timer = BATTERY_POLLING_COUNT;
 181 static struct adb_request batt_req;
 182 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 183
 184 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
 185 extern int disable_kernel_backlight;
 186 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
 187
 188 int __fake_sleep;
 189 int asleep;
 190 BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
 191
 192 #ifdef CONFIG_ADB
 193 static int adb_dev_map = 0;
 194 static int pmu_adb_flags;
 195
 196 static int pmu_probe(void);
 197 static int pmu_init(void);
 198 static int pmu_send_request(struct adb_request *req, int sync);
 199 static int pmu_adb_autopoll(int devs);
 200 static int pmu_adb_reset_bus(void);
 201 #endif /* CONFIG_ADB */
 202
 203 static int init_pmu(void);
 204 static void pmu_start(void);
 205 static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
 206 static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
 207 static int proc_get_info(char *page, char **start, off_t off,
 208                           int count, int *eof, void *data);
 209 static int proc_get_irqstats(char *page, char **start, off_t off,
 210                           int count, int *eof, void *data);
 211 #ifdef CONFIG_PMAC_BACKLIGHT
 212 static int pmu_set_backlight_level(int level, void* data);
 213 static int pmu_set_backlight_enable(int on, int level, void* data);
 214 #endif /* CONFIG_PMAC_BACKLIGHT */
 215 static void pmu_pass_intr(unsigned char *data, int len);
 216 static int proc_get_batt(char *page, char **start, off_t off,
 217                         int count, int *eof, void *data);
 218 static int proc_read_options(char *page, char **start, off_t off,
 219                         int count, int *eof, void *data);
 220 static int proc_write_options(struct file *file, const char __user *buffer,
 221                         unsigned long count, void *data);
 222
 223 #ifdef CONFIG_ADB
 224 struct adb_driver via_pmu_driver = {
 225         "PMU",
 226         pmu_probe,
 227         pmu_init,
 228         pmu_send_request,
 229         pmu_adb_autopoll,
 230         pmu_poll_adb,
 231         pmu_adb_reset_bus
 232 };
 233 #endif /* CONFIG_ADB */
 234
 235 extern void low_sleep_handler(void);
 236 extern void enable_kernel_altivec(void);
 237 extern void enable_kernel_fp(void);
 238
 239 #ifdef DEBUG_SLEEP
 240 int pmu_polled_request(struct adb_request *req);
 241 int pmu_wink(struct adb_request *req);
 242 #endif
 243
 244 /*
 245  * This table indicates for each PMU opcode:
 246  * - the number of data bytes to be sent with the command, or -1
 247  *   if a length byte should be sent,
 248  * - the number of response bytes which the PMU will return, or
 249  *   -1 if it will send a length byte.
 250  */
 251 static const s8 pmu_data_len[256][2] = {
 252 /*         0       1       2       3       4       5       6       7  */
 253 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 254 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 255 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 256 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 257 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 258 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 259 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 260 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 261 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 262 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 263 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 264 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 265 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 266 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 267 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 268 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 269 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 270 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 271 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 272 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 273 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 274 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 275 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 276 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 277 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 278 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 279 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 280 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 281 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 282 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 283 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 284 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 285 };
 286
 287 static char *pbook_type[] = {
 288         "Unknown PowerBook",
 289         "PowerBook 2400/3400/3500(G3)",
 290         "PowerBook G3 Series",
 291         "1999 PowerBook G3",
 292         "Core99"
 293 };
 294
 295 #ifdef CONFIG_PMAC_BACKLIGHT
 296 static struct backlight_controller pmu_backlight_controller = {
 297         pmu_set_backlight_enable,
 298         pmu_set_backlight_level
 299 };
 300 #endif /* CONFIG_PMAC_BACKLIGHT */
 301
 302 int __init find_via_pmu(void)
 303 {
 304         u64 taddr;
 305         u32 *reg;
 306
 307         if (via != 0)
 308                 return 1;
 309         vias = of_find_node_by_name(NULL, "via-pmu");
 310         if (vias == NULL)
 311                 return 0;
 312
 313         reg = (u32 *)get_property(vias, "reg", NULL);
 314         if (reg == NULL) {
 315                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 316                 goto fail;
 317         }
 318         taddr = of_translate_address(vias, reg);
 319         if (taddr == OF_BAD_ADDR) {
 320                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 321                 goto fail;
 322         }
 323
 324         spin_lock_init(&pmu_lock);
 325
 326         pmu_has_adb = 1;
 327
 328         pmu_intr_mask = PMU_INT_PCEJECT |
 329                         PMU_INT_SNDBRT |
 330                         PMU_INT_ADB |
 331                         PMU_INT_TICK;
 332
 333         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 334             || device_is_compatible(vias->parent, "ohare")))
 335                 pmu_kind = PMU_OHARE_BASED;
 336         else if (device_is_compatible(vias->parent, "paddington"))
 337                 pmu_kind = PMU_PADDINGTON_BASED;
 338         else if (device_is_compatible(vias->parent, "heathrow"))
 339                 pmu_kind = PMU_HEATHROW_BASED;
 340         else if (device_is_compatible(vias->parent, "Keylargo")
 341                  || device_is_compatible(vias->parent, "K2-Keylargo")) {
 342                 struct device_node *gpiop;
 343                 u64 gaddr = OF_BAD_ADDR;
 344
 345                 pmu_kind = PMU_KEYLARGO_BASED;
 346                 pmu_has_adb = (find_type_devices("adb") != NULL);
 347                 pmu_intr_mask = PMU_INT_PCEJECT |
 348                                 PMU_INT_SNDBRT |
 349                                 PMU_INT_ADB |
 350                                 PMU_INT_TICK |
 351                                 PMU_INT_ENVIRONMENT;
 352
 353                 gpiop = of_find_node_by_name(NULL, "gpio");
 354                 if (gpiop) {
 355                         reg = (u32 *)get_property(gpiop, "reg", NULL);
 356                         if (reg)
 357                                 gaddr = of_translate_address(gpiop, reg);
 358                         if (gaddr != OF_BAD_ADDR)
 359                                 gpio_reg = ioremap(gaddr, 0x10);
 360                 }
 361                 if (gpio_reg == NULL)
 362                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 363         } else
 364                 pmu_kind = PMU_UNKNOWN;
 365
 366         via = ioremap(taddr, 0x2000);
 367         if (via == NULL) {
 368                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 369                 goto fail;
 370         }
 371
 372         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 373         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 374
 375         pmu_state = idle;
 376
 377         if (!init_pmu()) {
 378                 via = NULL;
 379                 return 0;
 380         }
 381
 382         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 383                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 384
 385         sys_ctrler = SYS_CTRLER_PMU;
 386
 387         return 1;
 388  fail:
 389         of_node_put(vias);
 390         vias = NULL;
 391         return 0;
 392 }
 393
 394 #ifdef CONFIG_ADB
 395 static int pmu_probe(void)
 396 {
 397         return vias == NULL? -ENODEV: 0;
 398 }
 399
 400 static int __init pmu_init(void)
 401 {
 402         if (vias == NULL)
 403                 return -ENODEV;
 404         return 0;
 405 }
 406 #endif /* CONFIG_ADB */
 407
 408 /*
 409  * We can't wait until pmu_init gets called, that happens too late.
 410  * It happens after IDE and SCSI initialization, which can take a few
 411  * seconds, and by that time the PMU could have given up on us and
 412  * turned us off.
 413  * Thus this is called with arch_initcall rather than device_initcall.
 414  */
 415 static int __init via_pmu_start(void)
 416 {
 417         if (vias == NULL)
 418                 return -ENODEV;
 419
 420         bright_req_1.complete = 1;
 421         bright_req_2.complete = 1;
 422         batt_req.complete = 1;
 423
 424 #ifndef CONFIG_PPC_MERGE
 425         if (pmu_kind == PMU_KEYLARGO_BASED)
 426                 openpic_set_irq_priority(vias->intrs[0].line,
 427                                          OPENPIC_PRIORITY_DEFAULT + 1);
 428 #endif
 429
 430         if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU",
 431                         (void *)0)) {
 432                 printk(KERN_ERR "VIA-PMU: can't get irq %d\n",
 433                        vias->intrs[0].line);
 434                 return -EAGAIN;
 435         }
 436
 437         if (pmu_kind == PMU_KEYLARGO_BASED) {
 438                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 439                 if (gpio_node == NULL)
 440                         gpio_node = of_find_node_by_name(NULL,
 441                                                          "pmu-interrupt");
 442                 if (gpio_node && gpio_node->n_intrs > 0)
 443                         gpio_irq = gpio_node->intrs[0].line;
 444
 445                 if (gpio_irq != -1) {
 446                         if (request_irq(gpio_irq, gpio1_interrupt, 0,
 447                                         "GPIO1 ADB", (void *)0))
 448                                 printk(KERN_ERR "pmu: can't get irq %d"
 449                                        " (GPIO1)\n", gpio_irq);
 450                         else
 451                                 gpio_irq_enabled = 1;
 452                 }
 453         }
 454
 455         /* Enable interrupts */
 456         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 457
 458         pmu_fully_inited = 1;
 459
 460         /* Make sure PMU settle down before continuing. This is _very_ important
 461          * since the IDE probe may shut interrupts down for quite a bit of time. If
 462          * a PMU communication is pending while this happens, the PMU may timeout
 463          * Not that on Core99 machines, the PMU keeps sending us environement
 464          * messages, we should find a way to either fix IDE or make it call
 465          * pmu_suspend() before masking interrupts. This can also happens while
 466          * scolling with some fbdevs.
 467          */
 468         do {
 469                 pmu_poll();
 470         } while (pmu_state != idle);
 471
 472         return 0;
 473 }
 474
 475 arch_initcall(via_pmu_start);
 476
 477 /*
 478  * This has to be done after pci_init, which is a subsys_initcall.
 479  */
 480 static int __init via_pmu_dev_init(void)
 481 {
 482         if (vias == NULL)
 483                 return -ENODEV;
 484
 485 #ifdef CONFIG_PMAC_BACKLIGHT
 486         /* Enable backlight */
 487         register_backlight_controller(&pmu_backlight_controller, NULL, "pmu");
 488 #endif /* CONFIG_PMAC_BACKLIGHT */
 489
 490 #ifdef CONFIG_PPC32
 491         if (machine_is_compatible("AAPL,3400/2400") ||
 492                 machine_is_compatible("AAPL,3500")) {
 493                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 494                         NULL, PMAC_MB_INFO_MODEL, 0);
 495                 pmu_battery_count = 1;
 496                 if (mb == PMAC_TYPE_COMET)
 497                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 498                 else
 499                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 500         } else if (machine_is_compatible("AAPL,PowerBook1998") ||
 501                 machine_is_compatible("PowerBook1,1")) {
 502                 pmu_battery_count = 2;
 503                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 504                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 505         } else {
 506                 struct device_node* prim = find_devices("power-mgt");
 507                 u32 *prim_info = NULL;
 508                 if (prim)
 509                         prim_info = (u32 *)get_property(prim, "prim-info", NULL);
 510                 if (prim_info) {
 511                         /* Other stuffs here yet unknown */
 512                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 513                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 514                         if (pmu_battery_count > 1)
 515                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 516                 }
 517         }
 518 #endif /* CONFIG_PPC32 */
 519
 520         /* Create /proc/pmu */
 521         proc_pmu_root = proc_mkdir("pmu", NULL);
 522         if (proc_pmu_root) {
 523                 long i;
 524
 525                 for (i=0; i<pmu_battery_count; i++) {
 526                         char title[16];
 527                         sprintf(title, "battery_%ld", i);
 528                         proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
 529                                                 proc_get_batt, (void *)i);
 530                 }
 531
 532                 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
 533                                         proc_get_info, NULL);
 534                 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
 535                                         proc_get_irqstats, NULL);
 536                 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
 537                 if (proc_pmu_options) {
 538                         proc_pmu_options->nlink = 1;
 539                         proc_pmu_options->read_proc = proc_read_options;
 540                         proc_pmu_options->write_proc = proc_write_options;
 541                 }
 542         }
 543         return 0;
 544 }
 545
 546 device_initcall(via_pmu_dev_init);
 547
 548 static int
 549 init_pmu(void)
 550 {
 551         int timeout;
 552         struct adb_request req;
 553
 554         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 555         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 556
 557         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 558         timeout =  100000;
 559         while (!req.complete) {
 560                 if (--timeout < 0) {
 561                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 562                         return 0;
 563                 }
 564                 udelay(10);
 565                 pmu_poll();
 566         }
 567
 568         /* ack all pending interrupts */
 569         timeout = 100000;
 570         interrupt_data[0][0] = 1;
 571         while (interrupt_data[0][0] || pmu_state != idle) {
 572                 if (--timeout < 0) {
 573                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 574                         return 0;
 575                 }
 576                 if (pmu_state == idle)
 577                         adb_int_pending = 1;
 578                 via_pmu_interrupt(0, NULL, NULL);
 579                 udelay(10);
 580         }
 581
 582         /* Tell PMU we are ready.  */
 583         if (pmu_kind == PMU_KEYLARGO_BASED) {
 584                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 585                 while (!req.complete)
 586                         pmu_poll();
 587         }
 588
 589         /* Read PMU version */
 590         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 591         pmu_wait_complete(&req);
 592         if (req.reply_len > 0)
 593                 pmu_version = req.reply[0];
 594
 595         /* Read server mode setting */
 596         if (pmu_kind == PMU_KEYLARGO_BASED) {
 597                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 598                             PMU_PWR_GET_POWERUP_EVENTS);
 599                 pmu_wait_complete(&req);
 600                 if (req.reply_len == 2) {
 601                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 602                                 option_server_mode = 1;
 603                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 604                                option_server_mode ? "enabled" : "disabled");
 605                 }
 606         }
 607         return 1;
 608 }
 609
 610 int
 611 pmu_get_model(void)
 612 {
 613         return pmu_kind;
 614 }
 615
 616 static void pmu_set_server_mode(int server_mode)
 617 {
 618         struct adb_request req;
 619
 620         if (pmu_kind != PMU_KEYLARGO_BASED)
 621                 return;
 622
 623         option_server_mode = server_mode;
 624         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 625         pmu_wait_complete(&req);
 626         if (req.reply_len < 2)
 627                 return;
 628         if (server_mode)
 629                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 630                             PMU_PWR_SET_POWERUP_EVENTS,
 631                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 632         else
 633                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 634                             PMU_PWR_CLR_POWERUP_EVENTS,
 635                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 636         pmu_wait_complete(&req);
 637 }
 638
 639 /* This new version of the code for 2400/3400/3500 powerbooks
 640  * is inspired from the implementation in gkrellm-pmu
 641  */
 642 static void
 643 done_battery_state_ohare(struct adb_request* req)
 644 {
 645         /* format:
 646          *  [0]    :  flags
 647          *    0x01 :  AC indicator
 648          *    0x02 :  charging
 649          *    0x04 :  battery exist
 650          *    0x08 :
 651          *    0x10 :
 652          *    0x20 :  full charged
 653          *    0x40 :  pcharge reset
 654          *    0x80 :  battery exist
 655          *
 656          *  [1][2] :  battery voltage
 657          *  [3]    :  CPU temperature
 658          *  [4]    :  battery temperature
 659          *  [5]    :  current
 660          *  [6][7] :  pcharge
 661          *              --tkoba
 662          */
 663         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 664         long pcharge, charge, vb, vmax, lmax;
 665         long vmax_charging, vmax_charged;
 666         long amperage, voltage, time, max;
 667         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 668                         NULL, PMAC_MB_INFO_MODEL, 0);
 669
 670         if (req->reply[0] & 0x01)
 671                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 672         else
 673                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 674
 675         if (mb == PMAC_TYPE_COMET) {
 676                 vmax_charged = 189;
 677                 vmax_charging = 213;
 678                 lmax = 6500;
 679         } else {
 680                 vmax_charged = 330;
 681                 vmax_charging = 330;
 682                 lmax = 6500;
 683         }
 684         vmax = vmax_charged;
 685
 686         /* If battery installed */
 687         if (req->reply[0] & 0x04) {
 688                 bat_flags |= PMU_BATT_PRESENT;
 689                 if (req->reply[0] & 0x02)
 690                         bat_flags |= PMU_BATT_CHARGING;
 691                 vb = (req->reply[1] << 8) | req->reply[2];
 692                 voltage = (vb * 265 + 72665) / 10;
 693                 amperage = req->reply[5];
 694                 if ((req->reply[0] & 0x01) == 0) {
 695                         if (amperage > 200)
 696                                 vb += ((amperage - 200) * 15)/100;
 697                 } else if (req->reply[0] & 0x02) {
 698                         vb = (vb * 97) / 100;
 699                         vmax = vmax_charging;
 700                 }
 701                 charge = (100 * vb) / vmax;
 702                 if (req->reply[0] & 0x40) {
 703                         pcharge = (req->reply[6] << 8) + req->reply[7];
 704                         if (pcharge > lmax)
 705                                 pcharge = lmax;
 706                         pcharge *= 100;
 707                         pcharge = 100 - pcharge / lmax;
 708                         if (pcharge < charge)
 709                                 charge = pcharge;
 710                 }
 711                 if (amperage > 0)
 712                         time = (charge * 16440) / amperage;
 713                 else
 714                         time = 0;
 715                 max = 100;
 716                 amperage = -amperage;
 717         } else
 718                 charge = max = amperage = voltage = time = 0;
 719
 720         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 721         pmu_batteries[pmu_cur_battery].charge = charge;
 722         pmu_batteries[pmu_cur_battery].max_charge = max;
 723         pmu_batteries[pmu_cur_battery].amperage = amperage;
 724         pmu_batteries[pmu_cur_battery].voltage = voltage;
 725         pmu_batteries[pmu_cur_battery].time_remaining = time;
 726
 727         clear_bit(0, &async_req_locks);
 728 }
 729
 730 static void
 731 done_battery_state_smart(struct adb_request* req)
 732 {
 733         /* format:
 734          *  [0] : format of this structure (known: 3,4,5)
 735          *  [1] : flags
 736          *
 737          *  format 3 & 4:
 738          *
 739          *  [2] : charge
 740          *  [3] : max charge
 741          *  [4] : current
 742          *  [5] : voltage
 743          *
 744          *  format 5:
 745          *
 746          *  [2][3] : charge
 747          *  [4][5] : max charge
 748          *  [6][7] : current
 749          *  [8][9] : voltage
 750          */
 751
 752         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 753         int amperage;
 754         unsigned int capa, max, voltage;
 755
 756         if (req->reply[1] & 0x01)
 757                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 758         else
 759                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 760
 761
 762         capa = max = amperage = voltage = 0;
 763
 764         if (req->reply[1] & 0x04) {
 765                 bat_flags |= PMU_BATT_PRESENT;
 766                 switch(req->reply[0]) {
 767                         case 3:
 768                         case 4: capa = req->reply[2];
 769                                 max = req->reply[3];
 770                                 amperage = *((signed char *)&req->reply[4]);
 771                                 voltage = req->reply[5];
 772                                 break;
 773                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 774                                 max = (req->reply[4] << 8) | req->reply[5];
 775                                 amperage = *((signed short *)&req->reply[6]);
 776                                 voltage = (req->reply[8] << 8) | req->reply[9];
 777                                 break;
 778                         default:
 779                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 780                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 781                                 break;
 782                 }
 783         }
 784
 785         if ((req->reply[1] & 0x01) && (amperage > 0))
 786                 bat_flags |= PMU_BATT_CHARGING;
 787
 788         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 789         pmu_batteries[pmu_cur_battery].charge = capa;
 790         pmu_batteries[pmu_cur_battery].max_charge = max;
 791         pmu_batteries[pmu_cur_battery].amperage = amperage;
 792         pmu_batteries[pmu_cur_battery].voltage = voltage;
 793         if (amperage) {
 794                 if ((req->reply[1] & 0x01) && (amperage > 0))
 795                         pmu_batteries[pmu_cur_battery].time_remaining
 796                                 = ((max-capa) * 3600) / amperage;
 797                 else
 798                         pmu_batteries[pmu_cur_battery].time_remaining
 799                                 = (capa * 3600) / (-amperage);
 800         } else
 801                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 802
 803         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 804
 805         clear_bit(0, &async_req_locks);
 806 }
 807
 808 static void
 809 query_battery_state(void)
 810 {
 811         if (test_and_set_bit(0, &async_req_locks))
 812                 return;
 813         if (pmu_kind == PMU_OHARE_BASED)
 814                 pmu_request(&batt_req, done_battery_state_ohare,
 815                         1, PMU_BATTERY_STATE);
 816         else
 817                 pmu_request(&batt_req, done_battery_state_smart,
 818                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 819 }
 820
 821 static int
 822 proc_get_info(char *page, char **start, off_t off,
 823                 int count, int *eof, void *data)
 824 {
 825         char* p = page;
 826
 827         p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 828         p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
 829         p += sprintf(p, "AC Power               : %d\n",
 830                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 831         p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);
 832
 833         return p - page;
 834 }
 835
 836 static int
 837 proc_get_irqstats(char *page, char **start, off_t off,
 838                   int count, int *eof, void *data)
 839 {
 840         int i;
 841         char* p = page;
 842         static const char *irq_names[] = {
 843                 "Total CB1 triggered events",
 844                 "Total GPIO1 triggered events",
 845                 "PC-Card eject button",
 846                 "Sound/Brightness button",
 847                 "ADB message",
 848                 "Battery state change",
 849                 "Environment interrupt",
 850                 "Tick timer",
 851                 "Ghost interrupt (zero len)",
 852                 "Empty interrupt (empty mask)",
 853                 "Max irqs in a row"
 854         };
 855
 856         for (i=0; i<11; i++) {
 857                 p += sprintf(p, " %2u: %10u (%s)\n",
 858                              i, pmu_irq_stats[i], irq_names[i]);
 859         }
 860         return p - page;
 861 }
 862
 863 static int
 864 proc_get_batt(char *page, char **start, off_t off,
 865                 int count, int *eof, void *data)
 866 {
 867         long batnum = (long)data;
 868         char *p = page;
 869
 870         p += sprintf(p, "\n");
 871         p += sprintf(p, "flags      : %08x\n",
 872                 pmu_batteries[batnum].flags);
 873         p += sprintf(p, "charge     : %d\n",
 874                 pmu_batteries[batnum].charge);
 875         p += sprintf(p, "max_charge : %d\n",
 876                 pmu_batteries[batnum].max_charge);
 877         p += sprintf(p, "current    : %d\n",
 878                 pmu_batteries[batnum].amperage);
 879         p += sprintf(p, "voltage    : %d\n",
 880                 pmu_batteries[batnum].voltage);
 881         p += sprintf(p, "time rem.  : %d\n",
 882                 pmu_batteries[batnum].time_remaining);
 883
 884         return p - page;
 885 }
 886
 887 static int
 888 proc_read_options(char *page, char **start, off_t off,
 889                         int count, int *eof, void *data)
 890 {
 891         char *p = page;
 892
 893 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 894         if (pmu_kind == PMU_KEYLARGO_BASED &&
 895             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 896                 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
 897 #endif
 898         if (pmu_kind == PMU_KEYLARGO_BASED)
 899                 p += sprintf(p, "server_mode=%d\n", option_server_mode);
 900
 901         return p - page;
 902 }
 903
 904 static int
 905 proc_write_options(struct file *file, const char __user *buffer,
 906                         unsigned long count, void *data)
 907 {
 908         char tmp[33];
 909         char *label, *val;
 910         unsigned long fcount = count;
 911
 912         if (!count)
 913                 return -EINVAL;
 914         if (count > 32)
 915                 count = 32;
 916         if (copy_from_user(tmp, buffer, count))
 917                 return -EFAULT;
 918         tmp[count] = 0;
 919
 920         label = tmp;
 921         while(*label == ' ')
 922                 label++;
 923         val = label;
 924         while(*val && (*val != '=')) {
 925                 if (*val == ' ')
 926                         *val = 0;
 927                 val++;
 928         }
 929         if ((*val) == 0)
 930                 return -EINVAL;
 931         *(val++) = 0;
 932         while(*val == ' ')
 933                 val++;
 934 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 935         if (pmu_kind == PMU_KEYLARGO_BASED &&
 936             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 937                 if (!strcmp(label, "lid_wakeup"))
 938                         option_lid_wakeup = ((*val) == '1');
 939 #endif
 940         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 941                 int new_value;
 942                 new_value = ((*val) == '1');
 943                 if (new_value != option_server_mode)
 944                         pmu_set_server_mode(new_value);
 945         }
 946         return fcount;
 947 }
 948
 949 #ifdef CONFIG_ADB
 950 /* Send an ADB command */
 951 static int
 952 pmu_send_request(struct adb_request *req, int sync)
 953 {
 954         int i, ret;
 955
 956         if ((vias == NULL) || (!pmu_fully_inited)) {
 957                 req->complete = 1;
 958                 return -ENXIO;
 959         }
 960
 961         ret = -EINVAL;
 962
 963         switch (req->data[0]) {
 964         case PMU_PACKET:
 965                 for (i = 0; i < req->nbytes - 1; ++i)
 966                         req->data[i] = req->data[i+1];
 967                 --req->nbytes;
 968                 if (pmu_data_len[req->data[0]][1] != 0) {
 969                         req->reply[0] = ADB_RET_OK;
 970                         req->reply_len = 1;
 971                 } else
 972                         req->reply_len = 0;
 973                 ret = pmu_queue_request(req);
 974                 break;
 975         case CUDA_PACKET:
 976                 switch (req->data[1]) {
 977                 case CUDA_GET_TIME:
 978                         if (req->nbytes != 2)
 979                                 break;
 980                         req->data[0] = PMU_READ_RTC;
 981                         req->nbytes = 1;
 982                         req->reply_len = 3;
 983                         req->reply[0] = CUDA_PACKET;
 984                         req->reply[1] = 0;
 985                         req->reply[2] = CUDA_GET_TIME;
 986                         ret = pmu_queue_request(req);
 987                         break;
 988                 case CUDA_SET_TIME:
 989                         if (req->nbytes != 6)
 990                                 break;
 991                         req->data[0] = PMU_SET_RTC;
 992                         req->nbytes = 5;
 993                         for (i = 1; i <= 4; ++i)
 994                                 req->data[i] = req->data[i+1];
 995                         req->reply_len = 3;
 996                         req->reply[0] = CUDA_PACKET;
 997                         req->reply[1] = 0;
 998                         req->reply[2] = CUDA_SET_TIME;
 999                         ret = pmu_queue_request(req);
1000                         break;
1001                 }
1002                 break;
1003         case ADB_PACKET:
1004                 if (!pmu_has_adb)
1005                         return -ENXIO;
1006                 for (i = req->nbytes - 1; i > 1; --i)
1007                         req->data[i+2] = req->data[i];
1008                 req->data[3] = req->nbytes - 2;
1009                 req->data[2] = pmu_adb_flags;
1010                 /*req->data[1] = req->data[1];*/
1011                 req->data[0] = PMU_ADB_CMD;
1012                 req->nbytes += 2;
1013                 req->reply_expected = 1;
1014                 req->reply_len = 0;
1015                 ret = pmu_queue_request(req);
1016                 break;
1017         }
1018         if (ret) {
1019                 req->complete = 1;
1020                 return ret;
1021         }
1022
1023         if (sync)
1024                 while (!req->complete)
1025                         pmu_poll();
1026
1027         return 0;
1028 }
1029
1030 /* Enable/disable autopolling */
1031 static int
1032 pmu_adb_autopoll(int devs)
1033 {
1034         struct adb_request req;
1035
1036         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1037                 return -ENXIO;
1038
1039         if (devs) {
1040                 adb_dev_map = devs;
1041                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1042                             adb_dev_map >> 8, adb_dev_map);
1043                 pmu_adb_flags = 2;
1044         } else {
1045                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1046                 pmu_adb_flags = 0;
1047         }
1048         while (!req.complete)
1049                 pmu_poll();
1050         return 0;
1051 }
1052
1053 /* Reset the ADB bus */
1054 static int
1055 pmu_adb_reset_bus(void)
1056 {
1057         struct adb_request req;
1058         int save_autopoll = adb_dev_map;
1059
1060         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1061                 return -ENXIO;
1062
1063         /* anyone got a better idea?? */
1064         pmu_adb_autopoll(0);
1065
1066         req.nbytes = 5;
1067         req.done = NULL;
1068         req.data[0] = PMU_ADB_CMD;
1069         req.data[1] = 0;
1070         req.data[2] = ADB_BUSRESET;
1071         req.data[3] = 0;
1072         req.data[4] = 0;
1073         req.reply_len = 0;
1074         req.reply_expected = 1;
1075         if (pmu_queue_request(&req) != 0) {
1076                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1077                 return -EIO;
1078         }
1079         pmu_wait_complete(&req);
1080
1081         if (save_autopoll != 0)
1082                 pmu_adb_autopoll(save_autopoll);
1083
1084         return 0;
1085 }
1086 #endif /* CONFIG_ADB */
1087
1088 /* Construct and send a pmu request */
1089 int
1090 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1091             int nbytes, ...)
1092 {
1093         va_list list;
1094         int i;
1095
1096         if (vias == NULL)
1097                 return -ENXIO;
1098
1099         if (nbytes < 0 || nbytes > 32) {
1100                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1101                 req->complete = 1;
1102                 return -EINVAL;
1103         }
1104         req->nbytes = nbytes;
1105         req->done = done;
1106         va_start(list, nbytes);
1107         for (i = 0; i < nbytes; ++i)
1108                 req->data[i] = va_arg(list, int);
1109         va_end(list);
1110         req->reply_len = 0;
1111         req->reply_expected = 0;
1112         return pmu_queue_request(req);
1113 }
1114
1115 int
1116 pmu_queue_request(struct adb_request *req)
1117 {
1118         unsigned long flags;
1119         int nsend;
1120
1121         if (via == NULL) {
1122                 req->complete = 1;
1123                 return -ENXIO;
1124         }
1125         if (req->nbytes <= 0) {
1126                 req->complete = 1;
1127                 return 0;
1128         }
1129         nsend = pmu_data_len[req->data[0]][0];
1130         if (nsend >= 0 && req->nbytes != nsend + 1) {
1131                 req->complete = 1;
1132                 return -EINVAL;
1133         }
1134
1135         req->next = NULL;
1136         req->sent = 0;
1137         req->complete = 0;
1138
1139         spin_lock_irqsave(&pmu_lock, flags);
1140         if (current_req != 0) {
1141                 last_req->next = req;
1142                 last_req = req;
1143         } else {
1144                 current_req = req;
1145                 last_req = req;
1146                 if (pmu_state == idle)
1147                         pmu_start();
1148         }
1149         spin_unlock_irqrestore(&pmu_lock, flags);
1150
1151         return 0;
1152 }
1153
1154 static inline void
1155 wait_for_ack(void)
1156 {
1157         /* Sightly increased the delay, I had one occurrence of the message
1158          * reported
1159          */
1160         int timeout = 4000;
1161         while ((in_8(&via[B]) & TACK) == 0) {
1162                 if (--timeout < 0) {
1163                         printk(KERN_ERR "PMU not responding (!ack)\n");
1164                         return;
1165                 }
1166                 udelay(10);
1167         }
1168 }
1169
1170 /* New PMU seems to be very sensitive to those timings, so we make sure
1171  * PCI is flushed immediately */
1172 static inline void
1173 send_byte(int x)
1174 {
1175         volatile unsigned char __iomem *v = via;
1176
1177         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1178         out_8(&v[SR], x);
1179         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1180         (void)in_8(&v[B]);
1181 }
1182
1183 static inline void
1184 recv_byte(void)
1185 {
1186         volatile unsigned char __iomem *v = via;
1187
1188         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1189         in_8(&v[SR]);           /* resets SR */
1190         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1191         (void)in_8(&v[B]);
1192 }
1193
1194 static inline void
1195 pmu_done(struct adb_request *req)
1196 {
1197         void (*done)(struct adb_request *) = req->done;
1198         mb();
1199         req->complete = 1;
1200         /* Here, we assume that if the request has a done member, the
1201          * struct request will survive to setting req->complete to 1
1202          */
1203         if (done)
1204                 (*done)(req);
1205 }
1206
1207 static void
1208 pmu_start(void)
1209 {
1210         struct adb_request *req;
1211
1212         /* assert pmu_state == idle */
1213         /* get the packet to send */
1214         req = current_req;
1215         if (req == 0 || pmu_state != idle
1216             || (/*req->reply_expected && */req_awaiting_reply))
1217                 return;
1218
1219         pmu_state = sending;
1220         data_index = 1;
1221         data_len = pmu_data_len[req->data[0]][0];
1222
1223         /* Sounds safer to make sure ACK is high before writing. This helped
1224          * kill a problem with ADB and some iBooks
1225          */
1226         wait_for_ack();
1227         /* set the shift register to shift out and send a byte */
1228         send_byte(req->data[0]);
1229 }
1230
1231 void
1232 pmu_poll(void)
1233 {
1234         if (!via)
1235                 return;
1236         if (disable_poll)
1237                 return;
1238         via_pmu_interrupt(0, NULL, NULL);
1239 }
1240
1241 void
1242 pmu_poll_adb(void)
1243 {
1244         if (!via)
1245                 return;
1246         if (disable_poll)
1247                 return;
1248         /* Kicks ADB read when PMU is suspended */
1249         adb_int_pending = 1;
1250         do {
1251                 via_pmu_interrupt(0, NULL, NULL);
1252         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1253                 || req_awaiting_reply));
1254 }
1255
1256 void
1257 pmu_wait_complete(struct adb_request *req)
1258 {
1259         if (!via)
1260                 return;
1261         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1262                 via_pmu_interrupt(0, NULL, NULL);
1263 }
1264
1265 /* This function loops until the PMU is idle and prevents it from
1266  * anwsering to ADB interrupts. pmu_request can still be called.
1267  * This is done to avoid spurrious shutdowns when we know we'll have
1268  * interrupts switched off for a long time
1269  */
1270 void
1271 pmu_suspend(void)
1272 {
1273         unsigned long flags;
1274 #ifdef SUSPEND_USES_PMU
1275         struct adb_request *req;
1276 #endif
1277         if (!via)
1278                 return;
1279
1280         spin_lock_irqsave(&pmu_lock, flags);
1281         pmu_suspended++;
1282         if (pmu_suspended > 1) {
1283                 spin_unlock_irqrestore(&pmu_lock, flags);
1284                 return;
1285         }
1286
1287         do {
1288                 spin_unlock_irqrestore(&pmu_lock, flags);
1289                 if (req_awaiting_reply)
1290                         adb_int_pending = 1;
1291                 via_pmu_interrupt(0, NULL, NULL);
1292                 spin_lock_irqsave(&pmu_lock, flags);
1293                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1294 #ifdef SUSPEND_USES_PMU
1295                         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1296                         spin_unlock_irqrestore(&pmu_lock, flags);
1297                         while(!req.complete)
1298                                 pmu_poll();
1299 #else /* SUSPEND_USES_PMU */
1300                         if (gpio_irq >= 0)
1301                                 disable_irq_nosync(gpio_irq);
1302                         out_8(&via[IER], CB1_INT | IER_CLR);
1303                         spin_unlock_irqrestore(&pmu_lock, flags);
1304 #endif /* SUSPEND_USES_PMU */
1305                         break;
1306                 }
1307         } while (1);
1308 }
1309
1310 void
1311 pmu_resume(void)
1312 {
1313         unsigned long flags;
1314
1315         if (!via || (pmu_suspended < 1))
1316                 return;
1317
1318         spin_lock_irqsave(&pmu_lock, flags);
1319         pmu_suspended--;
1320         if (pmu_suspended > 0) {
1321                 spin_unlock_irqrestore(&pmu_lock, flags);
1322                 return;
1323         }
1324         adb_int_pending = 1;
1325 #ifdef SUSPEND_USES_PMU
1326         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1327         spin_unlock_irqrestore(&pmu_lock, flags);
1328         while(!req.complete)
1329                 pmu_poll();
1330 #else /* SUSPEND_USES_PMU */
1331         if (gpio_irq >= 0)
1332                 enable_irq(gpio_irq);
1333         out_8(&via[IER], CB1_INT | IER_SET);
1334         spin_unlock_irqrestore(&pmu_lock, flags);
1335         pmu_poll();
1336 #endif /* SUSPEND_USES_PMU */
1337 }
1338
1339 /* Interrupt data could be the result data from an ADB cmd */
1340 static void
1341 pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs)
1342 {
1343         unsigned char ints, pirq;
1344         int i = 0;
1345
1346         asleep = 0;
1347         if (drop_interrupts || len < 1) {
1348                 adb_int_pending = 0;
1349                 pmu_irq_stats[8]++;
1350                 return;
1351         }
1352
1353         /* Get PMU interrupt mask */
1354         ints = data[0];
1355
1356         /* Record zero interrupts for stats */
1357         if (ints == 0)
1358                 pmu_irq_stats[9]++;
1359
1360         /* Hack to deal with ADB autopoll flag */
1361         if (ints & PMU_INT_ADB)
1362                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1363
1364 next:
1365
1366         if (ints == 0) {
1367                 if (i > pmu_irq_stats[10])
1368                         pmu_irq_stats[10] = i;
1369                 return;
1370         }
1371
1372         for (pirq = 0; pirq < 8; pirq++)
1373                 if (ints & (1 << pirq))
1374                         break;
1375         pmu_irq_stats[pirq]++;
1376         i++;
1377         ints &= ~(1 << pirq);
1378
1379         /* Note: for some reason, we get an interrupt with len=1,
1380          * data[0]==0 after each normal ADB interrupt, at least
1381          * on the Pismo. Still investigating...  --BenH
1382          */
1383         if ((1 << pirq) & PMU_INT_ADB) {
1384                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1385                         struct adb_request *req = req_awaiting_reply;
1386                         if (req == 0) {
1387                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1388                                 return;
1389                         }
1390                         req_awaiting_reply = NULL;
1391                         if (len <= 2)
1392                                 req->reply_len = 0;
1393                         else {
1394                                 memcpy(req->reply, data + 1, len - 1);
1395                                 req->reply_len = len - 1;
1396                         }
1397                         pmu_done(req);
1398                 } else {
1399                         if (len == 4 && data[1] == 0x2c) {
1400                                 extern int xmon_wants_key, xmon_adb_keycode;
1401                                 if (xmon_wants_key) {
1402                                         xmon_adb_keycode = data[2];
1403                                         return;
1404                                 }
1405                         }
1406 #ifdef CONFIG_ADB
1407                         /*
1408                          * XXX On the [23]400 the PMU gives us an up
1409                          * event for keycodes 0x74 or 0x75 when the PC
1410                          * card eject buttons are released, so we
1411                          * ignore those events.
1412                          */
1413                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1414                               && data[1] == 0x2c && data[3] == 0xff
1415                               && (data[2] & ~1) == 0xf4))
1416                                 adb_input(data+1, len-1, regs, 1);
1417 #endif /* CONFIG_ADB */
1418                 }
1419         }
1420         /* Sound/brightness button pressed */
1421         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1422 #ifdef CONFIG_PMAC_BACKLIGHT
1423                 if (len == 3)
1424 #ifdef CONFIG_INPUT_ADBHID
1425                         if (!disable_kernel_backlight)
1426 #endif /* CONFIG_INPUT_ADBHID */
1427                                 set_backlight_level(data[1] >> 4);
1428 #endif /* CONFIG_PMAC_BACKLIGHT */
1429         }
1430         /* Tick interrupt */
1431         else if ((1 << pirq) & PMU_INT_TICK) {
1432                 /* Environement or tick interrupt, query batteries */
1433                 if (pmu_battery_count) {
1434                         if ((--query_batt_timer) == 0) {
1435                                 query_battery_state();
1436                                 query_batt_timer = BATTERY_POLLING_COUNT;
1437                         }
1438                 }
1439         }
1440         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1441                 if (pmu_battery_count)
1442                         query_battery_state();
1443                 pmu_pass_intr(data, len);
1444         } else {
1445                pmu_pass_intr(data, len);
1446         }
1447         goto next;
1448 }
1449
1450 static struct adb_request*
1451 pmu_sr_intr(struct pt_regs *regs)
1452 {
1453         struct adb_request *req;
1454         int bite = 0;
1455
1456         if (via[B] & TREQ) {
1457                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1458                 out_8(&via[IFR], SR_INT);
1459                 return NULL;
1460         }
1461         /* The ack may not yet be low when we get the interrupt */
1462         while ((in_8(&via[B]) & TACK) != 0)
1463                         ;
1464
1465         /* if reading grab the byte, and reset the interrupt */
1466         if (pmu_state == reading || pmu_state == reading_intr)
1467                 bite = in_8(&via[SR]);
1468
1469         /* reset TREQ and wait for TACK to go high */
1470         out_8(&via[B], in_8(&via[B]) | TREQ);
1471         wait_for_ack();
1472
1473         switch (pmu_state) {
1474         case sending:
1475                 req = current_req;
1476                 if (data_len < 0) {
1477                         data_len = req->nbytes - 1;
1478                         send_byte(data_len);
1479                         break;
1480                 }
1481                 if (data_index <= data_len) {
1482                         send_byte(req->data[data_index++]);
1483                         break;
1484                 }
1485                 req->sent = 1;
1486                 data_len = pmu_data_len[req->data[0]][1];
1487                 if (data_len == 0) {
1488                         pmu_state = idle;
1489                         current_req = req->next;
1490                         if (req->reply_expected)
1491                                 req_awaiting_reply = req;
1492                         else
1493                                 return req;
1494                 } else {
1495                         pmu_state = reading;
1496                         data_index = 0;
1497                         reply_ptr = req->reply + req->reply_len;
1498                         recv_byte();
1499                 }
1500                 break;
1501
1502         case intack:
1503                 data_index = 0;
1504                 data_len = -1;
1505                 pmu_state = reading_intr;
1506                 reply_ptr = interrupt_data[int_data_last];
1507                 recv_byte();
1508                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1509                         enable_irq(gpio_irq);
1510                         gpio_irq_enabled = 1;
1511                 }
1512                 break;
1513
1514         case reading:
1515         case reading_intr:
1516                 if (data_len == -1) {
1517                         data_len = bite;
1518                         if (bite > 32)
1519                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1520                 } else if (data_index < 32) {
1521                         reply_ptr[data_index++] = bite;
1522                 }
1523                 if (data_index < data_len) {
1524                         recv_byte();
1525                         break;
1526                 }
1527
1528                 if (pmu_state == reading_intr) {
1529                         pmu_state = idle;
1530                         int_data_state[int_data_last] = int_data_ready;
1531                         interrupt_data_len[int_data_last] = data_len;
1532                 } else {
1533                         req = current_req;
1534                         /*
1535                          * For PMU sleep and freq change requests, we lock the
1536                          * PMU until it's explicitely unlocked. This avoids any
1537                          * spurrious event polling getting in
1538                          */
1539                         current_req = req->next;
1540                         req->reply_len += data_index;
1541                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1542                                 pmu_state = locked;
1543                         else
1544                                 pmu_state = idle;
1545                         return req;
1546                 }
1547                 break;
1548
1549         default:
1550                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1551                        pmu_state);
1552         }
1553         return NULL;
1554 }
1555
1556 static irqreturn_t
1557 via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs)
1558 {
1559         unsigned long flags;
1560         int intr;
1561         int nloop = 0;
1562         int int_data = -1;
1563         struct adb_request *req = NULL;
1564         int handled = 0;
1565
1566         /* This is a bit brutal, we can probably do better */
1567         spin_lock_irqsave(&pmu_lock, flags);
1568         ++disable_poll;
1569
1570         for (;;) {
1571                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1572                 if (intr == 0)
1573                         break;
1574                 handled = 1;
1575                 if (++nloop > 1000) {
1576                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1577                                "intr=%x, ier=%x pmu_state=%d\n",
1578                                intr, in_8(&via[IER]), pmu_state);
1579                         break;
1580                 }
1581                 out_8(&via[IFR], intr);
1582                 if (intr & CB1_INT) {
1583                         adb_int_pending = 1;
1584                         pmu_irq_stats[0]++;
1585                 }
1586                 if (intr & SR_INT) {
1587                         req = pmu_sr_intr(regs);
1588                         if (req)
1589                                 break;
1590                 }
1591         }
1592
1593 recheck:
1594         if (pmu_state == idle) {
1595                 if (adb_int_pending) {
1596                         if (int_data_state[0] == int_data_empty)
1597                                 int_data_last = 0;
1598                         else if (int_data_state[1] == int_data_empty)
1599                                 int_data_last = 1;
1600                         else
1601                                 goto no_free_slot;
1602                         pmu_state = intack;
1603                         int_data_state[int_data_last] = int_data_fill;
1604                         /* Sounds safer to make sure ACK is high before writing.
1605                          * This helped kill a problem with ADB and some iBooks
1606                          */
1607                         wait_for_ack();
1608                         send_byte(PMU_INT_ACK);
1609                         adb_int_pending = 0;
1610                 } else if (current_req)
1611                         pmu_start();
1612         }
1613 no_free_slot:
1614         /* Mark the oldest buffer for flushing */
1615         if (int_data_state[!int_data_last] == int_data_ready) {
1616                 int_data_state[!int_data_last] = int_data_flush;
1617                 int_data = !int_data_last;
1618         } else if (int_data_state[int_data_last] == int_data_ready) {
1619                 int_data_state[int_data_last] = int_data_flush;
1620                 int_data = int_data_last;
1621         }
1622         --disable_poll;
1623         spin_unlock_irqrestore(&pmu_lock, flags);
1624
1625         /* Deal with completed PMU requests outside of the lock */
1626         if (req) {
1627                 pmu_done(req);
1628                 req = NULL;
1629         }
1630
1631         /* Deal with interrupt datas outside of the lock */
1632         if (int_data >= 0) {
1633                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs);
1634                 spin_lock_irqsave(&pmu_lock, flags);
1635                 ++disable_poll;
1636                 int_data_state[int_data] = int_data_empty;
1637                 int_data = -1;
1638                 goto recheck;
1639         }
1640
1641         return IRQ_RETVAL(handled);
1642 }
1643
1644 void
1645 pmu_unlock(void)
1646 {
1647         unsigned long flags;
1648
1649         spin_lock_irqsave(&pmu_lock, flags);
1650         if (pmu_state == locked)
1651                 pmu_state = idle;
1652         adb_int_pending = 1;
1653         spin_unlock_irqrestore(&pmu_lock, flags);
1654 }
1655
1656
1657 static irqreturn_t
1658 gpio1_interrupt(int irq, void *arg, struct pt_regs *regs)
1659 {
1660         unsigned long flags;
1661
1662         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1663                 spin_lock_irqsave(&pmu_lock, flags);
1664                 if (gpio_irq_enabled > 0) {
1665                         disable_irq_nosync(gpio_irq);
1666                         gpio_irq_enabled = 0;
1667                 }
1668                 pmu_irq_stats[1]++;
1669                 adb_int_pending = 1;
1670                 spin_unlock_irqrestore(&pmu_lock, flags);
1671                 via_pmu_interrupt(0, NULL, NULL);
1672                 return IRQ_HANDLED;
1673         }
1674         return IRQ_NONE;
1675 }
1676
1677 #ifdef CONFIG_PMAC_BACKLIGHT
1678 static int backlight_to_bright[] = {
1679         0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e,
1680         0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e
1681 };
1682
1683 static int
1684 pmu_set_backlight_enable(int on, int level, void* data)
1685 {
1686         struct adb_request req;
1687
1688         if (vias == NULL)
1689                 return -ENODEV;
1690
1691         if (on) {
1692                 pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
1693                             backlight_to_bright[level]);
1694                 pmu_wait_complete(&req);
1695         }
1696         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1697                     PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF));
1698         pmu_wait_complete(&req);
1699
1700         return 0;
1701 }
1702
1703 static void
1704 pmu_bright_complete(struct adb_request *req)
1705 {
1706         if (req == &bright_req_1)
1707                 clear_bit(1, &async_req_locks);
1708         if (req == &bright_req_2)
1709                 clear_bit(2, &async_req_locks);
1710 }
1711
1712 static int
1713 pmu_set_backlight_level(int level, void* data)
1714 {
1715         if (vias == NULL)
1716                 return -ENODEV;
1717
1718         if (test_and_set_bit(1, &async_req_locks))
1719                 return -EAGAIN;
1720         pmu_request(&bright_req_1, pmu_bright_complete, 2, PMU_BACKLIGHT_BRIGHT,
1721                 backlight_to_bright[level]);
1722         if (test_and_set_bit(2, &async_req_locks))
1723                 return -EAGAIN;
1724         pmu_request(&bright_req_2, pmu_bright_complete, 2, PMU_POWER_CTRL,
1725                     PMU_POW_BACKLIGHT | (level > BACKLIGHT_OFF ?
1726                                          PMU_POW_ON : PMU_POW_OFF));
1727
1728         return 0;
1729 }
1730 #endif /* CONFIG_PMAC_BACKLIGHT */
1731
1732 void
1733 pmu_enable_irled(int on)
1734 {
1735         struct adb_request req;
1736
1737         if (vias == NULL)
1738                 return ;
1739         if (pmu_kind == PMU_KEYLARGO_BASED)
1740                 return ;
1741
1742         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1743             (on ? PMU_POW_ON : PMU_POW_OFF));
1744         pmu_wait_complete(&req);
1745 }
1746
1747 void
1748 pmu_restart(void)
1749 {
1750         struct adb_request req;
1751
1752         if (via == NULL)
1753                 return;
1754
1755         local_irq_disable();
1756
1757         drop_interrupts = 1;
1758
1759         if (pmu_kind != PMU_KEYLARGO_BASED) {
1760                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1761                                                 PMU_INT_TICK );
1762                 while(!req.complete)
1763                         pmu_poll();
1764         }
1765
1766         pmu_request(&req, NULL, 1, PMU_RESET);
1767         pmu_wait_complete(&req);
1768         for (;;)
1769                 ;
1770 }
1771
1772 void
1773 pmu_shutdown(void)
1774 {
1775         struct adb_request req;
1776
1777         if (via == NULL)
1778                 return;
1779
1780         local_irq_disable();
1781
1782         drop_interrupts = 1;
1783
1784         if (pmu_kind != PMU_KEYLARGO_BASED) {
1785                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1786                                                 PMU_INT_TICK );
1787                 pmu_wait_complete(&req);
1788         } else {
1789                 /* Disable server mode on shutdown or we'll just
1790                  * wake up again
1791                  */
1792                 pmu_set_server_mode(0);
1793         }
1794
1795         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1796                     'M', 'A', 'T', 'T');
1797         pmu_wait_complete(&req);
1798         for (;;)
1799                 ;
1800 }
1801
1802 int
1803 pmu_present(void)
1804 {
1805         return via != 0;
1806 }
1807
1808 #ifdef CONFIG_PM
1809
1810 static LIST_HEAD(sleep_notifiers);
1811
1812 int
1813 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
1814 {
1815         struct list_head *list;
1816         struct pmu_sleep_notifier *notifier;
1817
1818         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1819              list = list->next) {
1820                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1821                 if (n->priority > notifier->priority)
1822                         break;
1823         }
1824         __list_add(&n->list, list->prev, list);
1825         return 0;
1826 }
1827 EXPORT_SYMBOL(pmu_register_sleep_notifier);
1828
1829 int
1830 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
1831 {
1832         if (n->list.next == 0)
1833                 return -ENOENT;
1834         list_del(&n->list);
1835         n->list.next = NULL;
1836         return 0;
1837 }
1838 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
1839 #endif /* CONFIG_PM */
1840
1841 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1842
1843 /* Sleep is broadcast last-to-first */
1844 static int
1845 broadcast_sleep(int when, int fallback)
1846 {
1847         int ret = PBOOK_SLEEP_OK;
1848         struct list_head *list;
1849         struct pmu_sleep_notifier *notifier;
1850
1851         for (list = sleep_notifiers.prev; list != &sleep_notifiers;
1852              list = list->prev) {
1853                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1854                 ret = notifier->notifier_call(notifier, when);
1855                 if (ret != PBOOK_SLEEP_OK) {
1856                         printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
1857                                when, notifier, notifier->notifier_call);
1858                         for (; list != &sleep_notifiers; list = list->next) {
1859                                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1860                                 notifier->notifier_call(notifier, fallback);
1861                         }
1862                         return ret;
1863                 }
1864         }
1865         return ret;
1866 }
1867
1868 /* Wake is broadcast first-to-last */
1869 static int
1870 broadcast_wake(void)
1871 {
1872         int ret = PBOOK_SLEEP_OK;
1873         struct list_head *list;
1874         struct pmu_sleep_notifier *notifier;
1875
1876         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1877              list = list->next) {
1878                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1879                 notifier->notifier_call(notifier, PBOOK_WAKE);
1880         }
1881         return ret;
1882 }
1883
1884 /*
1885  * This struct is used to store config register values for
1886  * PCI devices which may get powered off when we sleep.
1887  */
1888 static struct pci_save {
1889 #ifndef HACKED_PCI_SAVE
1890         u16     command;
1891         u16     cache_lat;
1892         u16     intr;
1893         u32     rom_address;
1894 #else
1895         u32     config[16];
1896 #endif
1897 } *pbook_pci_saves;
1898 static int pbook_npci_saves;
1899
1900 static void
1901 pbook_alloc_pci_save(void)
1902 {
1903         int npci;
1904         struct pci_dev *pd = NULL;
1905
1906         npci = 0;
1907         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1908                 ++npci;
1909         }
1910         if (npci == 0)
1911                 return;
1912         pbook_pci_saves = (struct pci_save *)
1913                 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
1914         pbook_npci_saves = npci;
1915 }
1916
1917 static void
1918 pbook_free_pci_save(void)
1919 {
1920         if (pbook_pci_saves == NULL)
1921                 return;
1922         kfree(pbook_pci_saves);
1923         pbook_pci_saves = NULL;
1924         pbook_npci_saves = 0;
1925 }
1926
1927 static void
1928 pbook_pci_save(void)
1929 {
1930         struct pci_save *ps = pbook_pci_saves;
1931         struct pci_dev *pd = NULL;
1932         int npci = pbook_npci_saves;
1933
1934         if (ps == NULL)
1935                 return;
1936
1937         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1938                 if (npci-- == 0)
1939                         return;
1940 #ifndef HACKED_PCI_SAVE
1941                 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
1942                 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
1943                 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
1944                 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
1945 #else
1946                 int i;
1947                 for (i=1;i<16;i++)
1948                         pci_read_config_dword(pd, i<<4, &ps->config[i]);
1949 #endif
1950                 ++ps;
1951         }
1952 }
1953
1954 /* For this to work, we must take care of a few things: If gmac was enabled
1955  * during boot, it will be in the pci dev list. If it's disabled at this point
1956  * (and it will probably be), then you can't access it's config space.
1957  */
1958 static void
1959 pbook_pci_restore(void)
1960 {
1961         u16 cmd;
1962         struct pci_save *ps = pbook_pci_saves - 1;
1963         struct pci_dev *pd = NULL;
1964         int npci = pbook_npci_saves;
1965         int j;
1966
1967         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1968 #ifdef HACKED_PCI_SAVE
1969                 int i;
1970                 if (npci-- == 0)
1971                         return;
1972                 ps++;
1973                 for (i=2;i<16;i++)
1974                         pci_write_config_dword(pd, i<<4, ps->config[i]);
1975                 pci_write_config_dword(pd, 4, ps->config[1]);
1976 #else
1977                 if (npci-- == 0)
1978                         return;
1979                 ps++;
1980                 if (ps->command == 0)
1981                         continue;
1982                 pci_read_config_word(pd, PCI_COMMAND, &cmd);
1983                 if ((ps->command & ~cmd) == 0)
1984                         continue;
1985                 switch (pd->hdr_type) {
1986                 case PCI_HEADER_TYPE_NORMAL:
1987                         for (j = 0; j < 6; ++j)
1988                                 pci_write_config_dword(pd,
1989                                         PCI_BASE_ADDRESS_0 + j*4,
1990                                         pd->resource[j].start);
1991                         pci_write_config_dword(pd, PCI_ROM_ADDRESS,
1992                                 ps->rom_address);
1993                         pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
1994                                 ps->cache_lat);
1995                         pci_write_config_word(pd, PCI_INTERRUPT_LINE,
1996                                 ps->intr);
1997                         pci_write_config_word(pd, PCI_COMMAND, ps->command);
1998                         break;
1999                 }
2000 #endif
2001         }
2002 }
2003
2004 #ifdef DEBUG_SLEEP
2005 /* N.B. This doesn't work on the 3400 */
2006 void
2007 pmu_blink(int n)
2008 {
2009         struct adb_request req;
2010
2011         memset(&req, 0, sizeof(req));
2012
2013         for (; n > 0; --n) {
2014                 req.nbytes = 4;
2015                 req.done = NULL;
2016                 req.data[0] = 0xee;
2017                 req.data[1] = 4;
2018                 req.data[2] = 0;
2019                 req.data[3] = 1;
2020                 req.reply[0] = ADB_RET_OK;
2021                 req.reply_len = 1;
2022                 req.reply_expected = 0;
2023                 pmu_polled_request(&req);
2024                 mdelay(50);
2025                 req.nbytes = 4;
2026                 req.done = NULL;
2027                 req.data[0] = 0xee;
2028                 req.data[1] = 4;
2029                 req.data[2] = 0;
2030                 req.data[3] = 0;
2031                 req.reply[0] = ADB_RET_OK;
2032                 req.reply_len = 1;
2033                 req.reply_expected = 0;
2034                 pmu_polled_request(&req);
2035                 mdelay(50);
2036         }
2037         mdelay(50);
2038 }
2039 #endif
2040
2041 /*
2042  * Put the powerbook to sleep.
2043  */
2044
2045 static u32 save_via[8];
2046
2047 static void
2048 save_via_state(void)
2049 {
2050         save_via[0] = in_8(&via[ANH]);
2051         save_via[1] = in_8(&via[DIRA]);
2052         save_via[2] = in_8(&via[B]);
2053         save_via[3] = in_8(&via[DIRB]);
2054         save_via[4] = in_8(&via[PCR]);
2055         save_via[5] = in_8(&via[ACR]);
2056         save_via[6] = in_8(&via[T1CL]);
2057         save_via[7] = in_8(&via[T1CH]);
2058 }
2059 static void
2060 restore_via_state(void)
2061 {
2062         out_8(&via[ANH], save_via[0]);
2063         out_8(&via[DIRA], save_via[1]);
2064         out_8(&via[B], save_via[2]);
2065         out_8(&via[DIRB], save_via[3]);
2066         out_8(&via[PCR], save_via[4]);
2067         out_8(&via[ACR], save_via[5]);
2068         out_8(&via[T1CL], save_via[6]);
2069         out_8(&via[T1CH], save_via[7]);
2070         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
2071         out_8(&via[IFR], 0x7f);                         /* clear IFR */
2072         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
2073 }
2074
2075 static int
2076 pmac_suspend_devices(void)
2077 {
2078         int ret;
2079
2080         pm_prepare_console();
2081
2082         /* Notify old-style device drivers & userland */
2083         ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
2084         if (ret != PBOOK_SLEEP_OK) {
2085                 printk(KERN_ERR "Sleep rejected by drivers\n");
2086                 return -EBUSY;
2087         }
2088
2089         /* Sync the disks. */
2090         /* XXX It would be nice to have some way to ensure that
2091          * nobody is dirtying any new buffers while we wait. That
2092          * could be achieved using the refrigerator for processes
2093          * that swsusp uses
2094          */
2095         sys_sync();
2096
2097         /* Sleep can fail now. May not be very robust but useful for debugging */
2098         ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
2099         if (ret != PBOOK_SLEEP_OK) {
2100                 printk(KERN_ERR "Driver sleep failed\n");
2101                 return -EBUSY;
2102         }
2103
2104         /* Send suspend call to devices, hold the device core's dpm_sem */
2105         ret = device_suspend(PMSG_SUSPEND);
2106         if (ret) {
2107                 broadcast_wake();
2108                 printk(KERN_ERR "Driver sleep failed\n");
2109                 return -EBUSY;
2110         }
2111
2112         /* Call platform functions marked "on sleep" */
2113         pmac_pfunc_i2c_suspend();
2114         pmac_pfunc_base_suspend();
2115
2116         /* Stop preemption */
2117         preempt_disable();
2118
2119         /* Make sure the decrementer won't interrupt us */
2120         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2121         /* Make sure any pending DEC interrupt occurring while we did
2122          * the above didn't re-enable the DEC */
2123         mb();
2124         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2125
2126         /* We can now disable MSR_EE. This code of course works properly only
2127          * on UP machines... For SMP, if we ever implement sleep, we'll have to
2128          * stop the "other" CPUs way before we do all that stuff.
2129          */
2130         local_irq_disable();
2131
2132         /* Broadcast power down irq
2133          * This isn't that useful in most cases (only directly wired devices can
2134          * use this but still... This will take care of sysdev's as well, so
2135          * we exit from here with local irqs disabled and PIC off.
2136          */
2137         ret = device_power_down(PMSG_SUSPEND);
2138         if (ret) {
2139                 wakeup_decrementer();
2140                 local_irq_enable();
2141                 preempt_enable();
2142                 device_resume();
2143                 broadcast_wake();
2144                 printk(KERN_ERR "Driver powerdown failed\n");
2145                 return -EBUSY;
2146         }
2147
2148         /* Wait for completion of async backlight requests */
2149         while (!bright_req_1.complete || !bright_req_2.complete ||
2150                         !batt_req.complete)
2151                 pmu_poll();
2152
2153         /* Giveup the lazy FPU & vec so we don't have to back them
2154          * up from the low level code
2155          */
2156         enable_kernel_fp();
2157
2158 #ifdef CONFIG_ALTIVEC
2159         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2160                 enable_kernel_altivec();
2161 #endif /* CONFIG_ALTIVEC */
2162
2163         return 0;
2164 }
2165
2166 static int
2167 pmac_wakeup_devices(void)
2168 {
2169         mdelay(100);
2170
2171         /* Power back up system devices (including the PIC) */
2172         device_power_up();
2173
2174         /* Force a poll of ADB interrupts */
2175         adb_int_pending = 1;
2176         via_pmu_interrupt(0, NULL, NULL);
2177
2178         /* Restart jiffies & scheduling */
2179         wakeup_decrementer();
2180
2181         /* Re-enable local CPU interrupts */
2182         local_irq_enable();
2183         mdelay(10);
2184         preempt_enable();
2185
2186         /* Call platform functions marked "on wake" */
2187         pmac_pfunc_base_resume();
2188         pmac_pfunc_i2c_resume();
2189
2190         /* Resume devices */
2191         device_resume();
2192
2193         /* Notify old style drivers */
2194         broadcast_wake();
2195
2196         pm_restore_console();
2197
2198         return 0;
2199 }
2200
2201 #define GRACKLE_PM      (1<<7)
2202 #define GRACKLE_DOZE    (1<<5)
2203 #define GRACKLE_NAP     (1<<4)
2204 #define GRACKLE_SLEEP   (1<<3)
2205
2206 static int powerbook_sleep_grackle(void)
2207 {
2208         unsigned long save_l2cr;
2209         unsigned short pmcr1;
2210         struct adb_request req;
2211         int ret;
2212         struct pci_dev *grackle;
2213
2214         grackle = pci_find_slot(0, 0);
2215         if (!grackle)
2216                 return -ENODEV;
2217
2218         ret = pmac_suspend_devices();
2219         if (ret) {
2220                 printk(KERN_ERR "Sleep rejected by devices\n");
2221                 return ret;
2222         }
2223
2224         /* Turn off various things. Darwin does some retry tests here... */
2225         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2226         pmu_wait_complete(&req);
2227         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2228                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2229         pmu_wait_complete(&req);
2230
2231         /* For 750, save backside cache setting and disable it */
2232         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2233
2234         if (!__fake_sleep) {
2235                 /* Ask the PMU to put us to sleep */
2236                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2237                 pmu_wait_complete(&req);
2238         }
2239
2240         /* The VIA is supposed not to be restored correctly*/
2241         save_via_state();
2242         /* We shut down some HW */
2243         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2244
2245         pci_read_config_word(grackle, 0x70, &pmcr1);
2246         /* Apparently, MacOS uses NAP mode for Grackle ??? */
2247         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2248         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2249         pci_write_config_word(grackle, 0x70, pmcr1);
2250
2251         /* Call low-level ASM sleep handler */
2252         if (__fake_sleep)
2253                 mdelay(5000);
2254         else
2255                 low_sleep_handler();
2256
2257         /* We're awake again, stop grackle PM */
2258         pci_read_config_word(grackle, 0x70, &pmcr1);
2259         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2260         pci_write_config_word(grackle, 0x70, pmcr1);
2261
2262         /* Make sure the PMU is idle */
2263         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2264         restore_via_state();
2265
2266         /* Restore L2 cache */
2267         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2268                 _set_L2CR(save_l2cr);
2269
2270         /* Restore userland MMU context */
2271         set_context(current->active_mm->context.id, current->active_mm->pgd);
2272
2273         /* Power things up */
2274         pmu_unlock();
2275         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2276         pmu_wait_complete(&req);
2277         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2278                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2279         pmu_wait_complete(&req);
2280         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2281                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2282         pmu_wait_complete(&req);
2283
2284         pmac_wakeup_devices();
2285
2286         return 0;
2287 }
2288
2289 static int
2290 powerbook_sleep_Core99(void)
2291 {
2292         unsigned long save_l2cr;
2293         unsigned long save_l3cr;
2294         struct adb_request req;
2295         int ret;
2296
2297         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2298                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2299                 return -ENOSYS;
2300         }
2301
2302         if (num_online_cpus() > 1 || cpu_is_offline(0))
2303                 return -EAGAIN;
2304
2305         ret = pmac_suspend_devices();
2306         if (ret) {
2307                 printk(KERN_ERR "Sleep rejected by devices\n");
2308                 return ret;
2309         }
2310
2311         /* Stop environment and ADB interrupts */
2312         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2313         pmu_wait_complete(&req);
2314
2315         /* Tell PMU what events will wake us up */
2316         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2317                 0xff, 0xff);
2318         pmu_wait_complete(&req);
2319         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2320                 0, PMU_PWR_WAKEUP_KEY |
2321                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2322         pmu_wait_complete(&req);
2323
2324         /* Save the state of the L2 and L3 caches */
2325         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
2326         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2327
2328         if (!__fake_sleep) {
2329                 /* Ask the PMU to put us to sleep */
2330                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2331                 pmu_wait_complete(&req);
2332         }
2333
2334         /* The VIA is supposed not to be restored correctly*/
2335         save_via_state();
2336
2337         /* Shut down various ASICs. There's a chance that we can no longer
2338          * talk to the PMU after this, so I moved it to _after_ sending the
2339          * sleep command to it. Still need to be checked.
2340          */
2341         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2342
2343         /* Call low-level ASM sleep handler */
2344         if (__fake_sleep)
2345                 mdelay(5000);
2346         else
2347                 low_sleep_handler();
2348
2349         /* Restore Apple core ASICs state */
2350         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2351
2352         /* Restore VIA */
2353         restore_via_state();
2354
2355         /* tweak LPJ before cpufreq is there */
2356         loops_per_jiffy *= 2;
2357
2358         /* Restore video */
2359         pmac_call_early_video_resume();
2360
2361         /* Restore L2 cache */
2362         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2363                 _set_L2CR(save_l2cr);
2364         /* Restore L3 cache */
2365         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2366                 _set_L3CR(save_l3cr);
2367
2368         /* Restore userland MMU context */
2369         set_context(current->active_mm->context.id, current->active_mm->pgd);
2370
2371         /* Tell PMU we are ready */
2372         pmu_unlock();
2373         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2374         pmu_wait_complete(&req);
2375         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2376         pmu_wait_complete(&req);
2377
2378         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2379         loops_per_jiffy /= 2;
2380
2381         pmac_wakeup_devices();
2382
2383         return 0;
2384 }
2385
2386 #define PB3400_MEM_CTRL         0xf8000000
2387 #define PB3400_MEM_CTRL_SLEEP   0x70
2388
2389 static int
2390 powerbook_sleep_3400(void)
2391 {
2392         int ret, i, x;
2393         unsigned int hid0;
2394         unsigned long p;
2395         struct adb_request sleep_req;
2396         void __iomem *mem_ctrl;
2397         unsigned int __iomem *mem_ctrl_sleep;
2398
2399         /* first map in the memory controller registers */
2400         mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2401         if (mem_ctrl == NULL) {
2402                 printk("powerbook_sleep_3400: ioremap failed\n");
2403                 return -ENOMEM;
2404         }
2405         mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2406
2407         /* Allocate room for PCI save */
2408         pbook_alloc_pci_save();
2409
2410         ret = pmac_suspend_devices();
2411         if (ret) {
2412                 pbook_free_pci_save();
2413                 printk(KERN_ERR "Sleep rejected by devices\n");
2414                 return ret;
2415         }
2416
2417         /* Save the state of PCI config space for some slots */
2418         pbook_pci_save();
2419
2420         /* Set the memory controller to keep the memory refreshed
2421            while we're asleep */
2422         for (i = 0x403f; i >= 0x4000; --i) {
2423                 out_be32(mem_ctrl_sleep, i);
2424                 do {
2425                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2426                 } while (x == 0);
2427                 if (x >= 0x100)
2428                         break;
2429         }
2430
2431         /* Ask the PMU to put us to sleep */
2432         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2433         while (!sleep_req.complete)
2434                 mb();
2435
2436         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2437
2438         /* displacement-flush the L2 cache - necessary? */
2439         for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2440                 i = *(volatile int *)p;
2441         asleep = 1;
2442
2443         /* Put the CPU into sleep mode */
2444         hid0 = mfspr(SPRN_HID0);
2445         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2446         mtspr(SPRN_HID0, hid0);
2447         mtmsr(mfmsr() | MSR_POW | MSR_EE);
2448         udelay(10);
2449
2450         /* OK, we're awake again, start restoring things */
2451         out_be32(mem_ctrl_sleep, 0x3f);
2452         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2453         pbook_pci_restore();
2454         pmu_unlock();
2455
2456         /* wait for the PMU interrupt sequence to complete */
2457         while (asleep)
2458                 mb();
2459
2460         pmac_wakeup_devices();
2461         pbook_free_pci_save();
2462         iounmap(mem_ctrl);
2463
2464         return 0;
2465 }
2466
2467 #endif /* CONFIG_PM && CONFIG_PPC32 */
2468
2469 /*
2470  * Support for /dev/pmu device
2471  */
2472 #define RB_SIZE         0x10
2473 struct pmu_private {
2474         struct list_head list;
2475         int     rb_get;
2476         int     rb_put;
2477         struct rb_entry {
2478                 unsigned short len;
2479                 unsigned char data[16];
2480         }       rb_buf[RB_SIZE];
2481         wait_queue_head_t wait;
2482         spinlock_t lock;
2483 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2484         int     backlight_locker;
2485 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2486 };
2487
2488 static LIST_HEAD(all_pmu_pvt);
2489 static DEFINE_SPINLOCK(all_pvt_lock);
2490
2491 static void
2492 pmu_pass_intr(unsigned char *data, int len)
2493 {
2494         struct pmu_private *pp;
2495         struct list_head *list;
2496         int i;
2497         unsigned long flags;
2498
2499         if (len > sizeof(pp->rb_buf[0].data))
2500                 len = sizeof(pp->rb_buf[0].data);
2501         spin_lock_irqsave(&all_pvt_lock, flags);
2502         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2503                 pp = list_entry(list, struct pmu_private, list);
2504                 spin_lock(&pp->lock);
2505                 i = pp->rb_put + 1;
2506                 if (i >= RB_SIZE)
2507                         i = 0;
2508                 if (i != pp->rb_get) {
2509                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2510                         rp->len = len;
2511                         memcpy(rp->data, data, len);
2512                         pp->rb_put = i;
2513                         wake_up_interruptible(&pp->wait);
2514                 }
2515                 spin_unlock(&pp->lock);
2516         }
2517         spin_unlock_irqrestore(&all_pvt_lock, flags);
2518 }
2519
2520 static int
2521 pmu_open(struct inode *inode, struct file *file)
2522 {
2523         struct pmu_private *pp;
2524         unsigned long flags;
2525
2526         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2527         if (pp == 0)
2528                 return -ENOMEM;
2529         pp->rb_get = pp->rb_put = 0;
2530         spin_lock_init(&pp->lock);
2531         init_waitqueue_head(&pp->wait);
2532         spin_lock_irqsave(&all_pvt_lock, flags);
2533 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2534         pp->backlight_locker = 0;
2535 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2536         list_add(&pp->list, &all_pmu_pvt);
2537         spin_unlock_irqrestore(&all_pvt_lock, flags);
2538         file->private_data = pp;
2539         return 0;
2540 }
2541
2542 static ssize_t
2543 pmu_read(struct file *file, char __user *buf,
2544                         size_t count, loff_t *ppos)
2545 {
2546         struct pmu_private *pp = file->private_data;
2547         DECLARE_WAITQUEUE(wait, current);
2548         unsigned long flags;
2549         int ret = 0;
2550
2551         if (count < 1 || pp == 0)
2552                 return -EINVAL;
2553         if (!access_ok(VERIFY_WRITE, buf, count))
2554                 return -EFAULT;
2555
2556         spin_lock_irqsave(&pp->lock, flags);
2557         add_wait_queue(&pp->wait, &wait);
2558         current->state = TASK_INTERRUPTIBLE;
2559
2560         for (;;) {
2561                 ret = -EAGAIN;
2562                 if (pp->rb_get != pp->rb_put) {
2563                         int i = pp->rb_get;
2564                         struct rb_entry *rp = &pp->rb_buf[i];
2565                         ret = rp->len;
2566                         spin_unlock_irqrestore(&pp->lock, flags);
2567                         if (ret > count)
2568                                 ret = count;
2569                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2570                                 ret = -EFAULT;
2571                         if (++i >= RB_SIZE)
2572                                 i = 0;
2573                         spin_lock_irqsave(&pp->lock, flags);
2574                         pp->rb_get = i;
2575                 }
2576                 if (ret >= 0)
2577                         break;
2578                 if (file->f_flags & O_NONBLOCK)
2579                         break;
2580                 ret = -ERESTARTSYS;
2581                 if (signal_pending(current))
2582                         break;
2583                 spin_unlock_irqrestore(&pp->lock, flags);
2584                 schedule();
2585                 spin_lock_irqsave(&pp->lock, flags);
2586         }
2587         current->state = TASK_RUNNING;
2588         remove_wait_queue(&pp->wait, &wait);
2589         spin_unlock_irqrestore(&pp->lock, flags);
2590
2591         return ret;
2592 }
2593
2594 static ssize_t
2595 pmu_write(struct file *file, const char __user *buf,
2596                          size_t count, loff_t *ppos)
2597 {
2598         return 0;
2599 }
2600
2601 static unsigned int
2602 pmu_fpoll(struct file *filp, poll_table *wait)
2603 {
2604         struct pmu_private *pp = filp->private_data;
2605         unsigned int mask = 0;
2606         unsigned long flags;
2607
2608         if (pp == 0)
2609                 return 0;
2610         poll_wait(filp, &pp->wait, wait);
2611         spin_lock_irqsave(&pp->lock, flags);
2612         if (pp->rb_get != pp->rb_put)
2613                 mask |= POLLIN;
2614         spin_unlock_irqrestore(&pp->lock, flags);
2615         return mask;
2616 }
2617
2618 static int
2619 pmu_release(struct inode *inode, struct file *file)
2620 {
2621         struct pmu_private *pp = file->private_data;
2622         unsigned long flags;
2623
2624         lock_kernel();
2625         if (pp != 0) {
2626                 file->private_data = NULL;
2627                 spin_lock_irqsave(&all_pvt_lock, flags);
2628                 list_del(&pp->list);
2629                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2630 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2631                 if (pp->backlight_locker) {
2632                         spin_lock_irqsave(&pmu_lock, flags);
2633                         disable_kernel_backlight--;
2634                         spin_unlock_irqrestore(&pmu_lock, flags);
2635                 }
2636 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2637                 kfree(pp);
2638         }
2639         unlock_kernel();
2640         return 0;
2641 }
2642
2643 static int
2644 pmu_ioctl(struct inode * inode, struct file *filp,
2645                      u_int cmd, u_long arg)
2646 {
2647         __u32 __user *argp = (__u32 __user *)arg;
2648         int error = -EINVAL;
2649
2650         switch (cmd) {
2651 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2652         case PMU_IOC_SLEEP:
2653                 if (!capable(CAP_SYS_ADMIN))
2654                         return -EACCES;
2655                 if (sleep_in_progress)
2656                         return -EBUSY;
2657                 sleep_in_progress = 1;
2658                 switch (pmu_kind) {
2659                 case PMU_OHARE_BASED:
2660                         error = powerbook_sleep_3400();
2661                         break;
2662                 case PMU_HEATHROW_BASED:
2663                 case PMU_PADDINGTON_BASED:
2664                         error = powerbook_sleep_grackle();
2665                         break;
2666                 case PMU_KEYLARGO_BASED:
2667                         error = powerbook_sleep_Core99();
2668                         break;
2669                 default:
2670                         error = -ENOSYS;
2671                 }
2672                 sleep_in_progress = 0;
2673                 break;
2674         case PMU_IOC_CAN_SLEEP:
2675                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2676                         return put_user(0, argp);
2677                 else
2678                         return put_user(1, argp);
2679 #endif /* CONFIG_PM && CONFIG_PPC32 */
2680
2681 #ifdef CONFIG_PMAC_BACKLIGHT
2682         /* Backlight should have its own device or go via
2683          * the fbdev
2684          */
2685         case PMU_IOC_GET_BACKLIGHT:
2686                 if (sleep_in_progress)
2687                         return -EBUSY;
2688                 error = get_backlight_level();
2689                 if (error < 0)
2690                         return error;
2691                 return put_user(error, argp);
2692         case PMU_IOC_SET_BACKLIGHT:
2693         {
2694                 __u32 value;
2695                 if (sleep_in_progress)
2696                         return -EBUSY;
2697                 error = get_user(value, argp);
2698                 if (!error)
2699                         error = set_backlight_level(value);
2700                 break;
2701         }
2702 #ifdef CONFIG_INPUT_ADBHID
2703         case PMU_IOC_GRAB_BACKLIGHT: {
2704                 struct pmu_private *pp = filp->private_data;
2705                 unsigned long flags;
2706
2707                 if (pp->backlight_locker)
2708                         return 0;
2709                 pp->backlight_locker = 1;
2710                 spin_lock_irqsave(&pmu_lock, flags);
2711                 disable_kernel_backlight++;
2712                 spin_unlock_irqrestore(&pmu_lock, flags);
2713                 return 0;
2714         }
2715 #endif /* CONFIG_INPUT_ADBHID */
2716 #endif /* CONFIG_PMAC_BACKLIGHT */
2717         case PMU_IOC_GET_MODEL:
2718                 return put_user(pmu_kind, argp);
2719         case PMU_IOC_HAS_ADB:
2720                 return put_user(pmu_has_adb, argp);
2721         }
2722         return error;
2723 }
2724
2725 static struct file_operations pmu_device_fops = {
2726         .read           = pmu_read,
2727         .write          = pmu_write,
2728         .poll           = pmu_fpoll,
2729         .ioctl          = pmu_ioctl,
2730         .open           = pmu_open,
2731         .release        = pmu_release,
2732 };
2733
2734 static struct miscdevice pmu_device = {
2735         PMU_MINOR, "pmu", &pmu_device_fops
2736 };
2737
2738 static int pmu_device_init(void)
2739 {
2740         if (!via)
2741                 return 0;
2742         if (misc_register(&pmu_device) < 0)
2743                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2744         return 0;
2745 }
2746 device_initcall(pmu_device_init);
2747
2748
2749 #ifdef DEBUG_SLEEP
2750 static inline void
2751 polled_handshake(volatile unsigned char __iomem *via)
2752 {
2753         via[B] &= ~TREQ; eieio();
2754         while ((via[B] & TACK) != 0)
2755                 ;
2756         via[B] |= TREQ; eieio();
2757         while ((via[B] & TACK) == 0)
2758                 ;
2759 }
2760
2761 static inline void
2762 polled_send_byte(volatile unsigned char __iomem *via, int x)
2763 {
2764         via[ACR] |= SR_OUT | SR_EXT; eieio();
2765         via[SR] = x; eieio();
2766         polled_handshake(via);
2767 }
2768
2769 static inline int
2770 polled_recv_byte(volatile unsigned char __iomem *via)
2771 {
2772         int x;
2773
2774         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2775         x = via[SR]; eieio();
2776         polled_handshake(via);
2777         x = via[SR]; eieio();
2778         return x;
2779 }
2780
2781 int
2782 pmu_polled_request(struct adb_request *req)
2783 {
2784         unsigned long flags;
2785         int i, l, c;
2786         volatile unsigned char __iomem *v = via;
2787
2788         req->complete = 1;
2789         c = req->data[0];
2790         l = pmu_data_len[c][0];
2791         if (l >= 0 && req->nbytes != l + 1)
2792                 return -EINVAL;
2793
2794         local_irq_save(flags);
2795         while (pmu_state != idle)
2796                 pmu_poll();
2797
2798         while ((via[B] & TACK) == 0)
2799                 ;
2800         polled_send_byte(v, c);
2801         if (l < 0) {
2802                 l = req->nbytes - 1;
2803                 polled_send_byte(v, l);
2804         }
2805         for (i = 1; i <= l; ++i)
2806                 polled_send_byte(v, req->data[i]);
2807
2808         l = pmu_data_len[c][1];
2809         if (l < 0)
2810                 l = polled_recv_byte(v);
2811         for (i = 0; i < l; ++i)
2812                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2813
2814         if (req->done)
2815                 (*req->done)(req);
2816
2817         local_irq_restore(flags);
2818         return 0;
2819 }
2820 #endif /* DEBUG_SLEEP */
2821
2822
2823 /* FIXME: This is a temporary set of callbacks to enable us
2824  * to do suspend-to-disk.
2825  */
2826
2827 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2828
2829 static int pmu_sys_suspended = 0;
2830
2831 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2832 {
2833         if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2834                 return 0;
2835
2836         /* Suspend PMU event interrupts */
2837         pmu_suspend();
2838
2839         pmu_sys_suspended = 1;
2840         return 0;
2841 }
2842
2843 static int pmu_sys_resume(struct sys_device *sysdev)
2844 {
2845         struct adb_request req;
2846
2847         if (!pmu_sys_suspended)
2848                 return 0;
2849
2850         /* Tell PMU we are ready */
2851         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2852         pmu_wait_complete(&req);
2853
2854         /* Resume PMU event interrupts */
2855         pmu_resume();
2856
2857         pmu_sys_suspended = 0;
2858
2859         return 0;
2860 }
2861
2862 #endif /* CONFIG_PM && CONFIG_PPC32 */
2863
2864 static struct sysdev_class pmu_sysclass = {
2865         set_kset_name("pmu"),
2866 };
2867
2868 static struct sys_device device_pmu = {
2869         .id             = 0,
2870         .cls            = &pmu_sysclass,
2871 };
2872
2873 static struct sysdev_driver driver_pmu = {
2874 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2875         .suspend        = &pmu_sys_suspend,
2876         .resume         = &pmu_sys_resume,
2877 #endif /* CONFIG_PM && CONFIG_PPC32 */
2878 };
2879
2880 static int __init init_pmu_sysfs(void)
2881 {
2882         int rc;
2883
2884         rc = sysdev_class_register(&pmu_sysclass);
2885         if (rc) {
2886                 printk(KERN_ERR "Failed registering PMU sys class\n");
2887                 return -ENODEV;
2888         }
2889         rc = sysdev_register(&device_pmu);
2890         if (rc) {
2891                 printk(KERN_ERR "Failed registering PMU sys device\n");
2892                 return -ENODEV;
2893         }
2894         rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2895         if (rc) {
2896                 printk(KERN_ERR "Failed registering PMU sys driver\n");
2897                 return -ENODEV;
2898         }
2899         return 0;
2900 }
2901
2902 subsys_initcall(init_pmu_sysfs);
2903
2904 EXPORT_SYMBOL(pmu_request);
2905 EXPORT_SYMBOL(pmu_queue_request);
2906 EXPORT_SYMBOL(pmu_poll);
2907 EXPORT_SYMBOL(pmu_poll_adb);
2908 EXPORT_SYMBOL(pmu_wait_complete);
2909 EXPORT_SYMBOL(pmu_suspend);
2910 EXPORT_SYMBOL(pmu_resume);
2911 EXPORT_SYMBOL(pmu_unlock);
2912 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2913 EXPORT_SYMBOL(pmu_enable_irled);
2914 EXPORT_SYMBOL(pmu_battery_count);
2915 EXPORT_SYMBOL(pmu_batteries);
2916 EXPORT_SYMBOL(pmu_power_flags);
2917 #endif /* CONFIG_PM && CONFIG_PPC32 */
2918