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  * Copyright (C) 2006-2007 Johannes Berg
  14  *
  15  * THIS DRIVER IS BECOMING A TOTAL MESS !
  16  *  - Cleanup atomically disabling reply to PMU events after
  17  *    a sleep or a freq. switch
  18  *
  19  */
  20 #include <stdarg.h>
  21 #include <linux/types.h>
  22 #include <linux/errno.h>
  23 #include <linux/kernel.h>
  24 #include <linux/delay.h>
  25 #include <linux/sched.h>
  26 #include <linux/miscdevice.h>
  27 #include <linux/blkdev.h>
  28 #include <linux/pci.h>
  29 #include <linux/slab.h>
  30 #include <linux/poll.h>
  31 #include <linux/adb.h>
  32 #include <linux/pmu.h>
  33 #include <linux/cuda.h>
  34 #include <linux/module.h>
  35 #include <linux/spinlock.h>
  36 #include <linux/pm.h>
  37 #include <linux/proc_fs.h>
  38 #include <linux/init.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/device.h>
  41 #include <linux/sysdev.h>
  42 #include <linux/freezer.h>
  43 #include <linux/syscalls.h>
  44 #include <linux/suspend.h>
  45 #include <linux/cpu.h>
  46 #include <asm/prom.h>
  47 #include <asm/machdep.h>
  48 #include <asm/io.h>
  49 #include <asm/pgtable.h>
  50 #include <asm/system.h>
  51 #include <asm/sections.h>
  52 #include <asm/irq.h>
  53 #include <asm/pmac_feature.h>
  54 #include <asm/pmac_pfunc.h>
  55 #include <asm/pmac_low_i2c.h>
  56 #include <asm/uaccess.h>
  57 #include <asm/mmu_context.h>
  58 #include <asm/cputable.h>
  59 #include <asm/time.h>
  60 #include <asm/backlight.h>
  61
  62 #include "via-pmu-event.h"
  63
  64 /* Some compile options */
  65 #undef DEBUG_SLEEP
  66
  67 /* Misc minor number allocated for /dev/pmu */
  68 #define PMU_MINOR               154
  69
  70 /* How many iterations between battery polls */
  71 #define BATTERY_POLLING_COUNT   2
  72
  73 static volatile unsigned char __iomem *via;
  74
  75 /* VIA registers - spaced 0x200 bytes apart */
  76 #define RS              0x200           /* skip between registers */
  77 #define B               0               /* B-side data */
  78 #define A               RS              /* A-side data */
  79 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  80 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  81 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  82 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  83 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  84 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  85 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  86 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  87 #define SR              (10*RS)         /* Shift register */
  88 #define ACR             (11*RS)         /* Auxiliary control register */
  89 #define PCR             (12*RS)         /* Peripheral control register */
  90 #define IFR             (13*RS)         /* Interrupt flag register */
  91 #define IER             (14*RS)         /* Interrupt enable register */
  92 #define ANH             (15*RS)         /* A-side data, no handshake */
  93
  94 /* Bits in B data register: both active low */
  95 #define TACK            0x08            /* Transfer acknowledge (input) */
  96 #define TREQ            0x10            /* Transfer request (output) */
  97
  98 /* Bits in ACR */
  99 #define SR_CTRL         0x1c            /* Shift register control bits */
 100 #define SR_EXT          0x0c            /* Shift on external clock */
 101 #define SR_OUT          0x10            /* Shift out if 1 */
 102
 103 /* Bits in IFR and IER */
 104 #define IER_SET         0x80            /* set bits in IER */
 105 #define IER_CLR         0               /* clear bits in IER */
 106 #define SR_INT          0x04            /* Shift register full/empty */
 107 #define CB2_INT         0x08
 108 #define CB1_INT         0x10            /* transition on CB1 input */
 109
 110 static volatile enum pmu_state {
 111         idle,
 112         sending,
 113         intack,
 114         reading,
 115         reading_intr,
 116         locked,
 117 } pmu_state;
 118
 119 static volatile enum int_data_state {
 120         int_data_empty,
 121         int_data_fill,
 122         int_data_ready,
 123         int_data_flush
 124 } int_data_state[2] = { int_data_empty, int_data_empty };
 125
 126 static struct adb_request *current_req;
 127 static struct adb_request *last_req;
 128 static struct adb_request *req_awaiting_reply;
 129 static unsigned char interrupt_data[2][32];
 130 static int interrupt_data_len[2];
 131 static int int_data_last;
 132 static unsigned char *reply_ptr;
 133 static int data_index;
 134 static int data_len;
 135 static volatile int adb_int_pending;
 136 static volatile int disable_poll;
 137 static struct device_node *vias;
 138 static int pmu_kind = PMU_UNKNOWN;
 139 static int pmu_fully_inited;
 140 static int pmu_has_adb;
 141 static struct device_node *gpio_node;
 142 static unsigned char __iomem *gpio_reg;
 143 static int gpio_irq = NO_IRQ;
 144 static int gpio_irq_enabled = -1;
 145 static volatile int pmu_suspended;
 146 static spinlock_t pmu_lock;
 147 static u8 pmu_intr_mask;
 148 static int pmu_version;
 149 static int drop_interrupts;
 150 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 151 static int option_lid_wakeup = 1;
 152 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
 153 static unsigned long async_req_locks;
 154 static unsigned int pmu_irq_stats[11];
 155
 156 static struct proc_dir_entry *proc_pmu_root;
 157 static struct proc_dir_entry *proc_pmu_info;
 158 static struct proc_dir_entry *proc_pmu_irqstats;
 159 static struct proc_dir_entry *proc_pmu_options;
 160 static int option_server_mode;
 161
 162 int pmu_battery_count;
 163 int pmu_cur_battery;
 164 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 165 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 166 static int query_batt_timer = BATTERY_POLLING_COUNT;
 167 static struct adb_request batt_req;
 168 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 169
 170 int __fake_sleep;
 171 int asleep;
 172
 173 #ifdef CONFIG_ADB
 174 static int adb_dev_map;
 175 static int pmu_adb_flags;
 176
 177 static int pmu_probe(void);
 178 static int pmu_init(void);
 179 static int pmu_send_request(struct adb_request *req, int sync);
 180 static int pmu_adb_autopoll(int devs);
 181 static int pmu_adb_reset_bus(void);
 182 #endif /* CONFIG_ADB */
 183
 184 static int init_pmu(void);
 185 static void pmu_start(void);
 186 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
 187 static irqreturn_t gpio1_interrupt(int irq, void *arg);
 188 static int proc_get_info(char *page, char **start, off_t off,
 189                           int count, int *eof, void *data);
 190 static int proc_get_irqstats(char *page, char **start, off_t off,
 191                           int count, int *eof, void *data);
 192 static void pmu_pass_intr(unsigned char *data, int len);
 193 static int proc_get_batt(char *page, char **start, off_t off,
 194                         int count, int *eof, void *data);
 195 static int proc_read_options(char *page, char **start, off_t off,
 196                         int count, int *eof, void *data);
 197 static int proc_write_options(struct file *file, const char __user *buffer,
 198                         unsigned long count, void *data);
 199
 200 #ifdef CONFIG_ADB
 201 struct adb_driver via_pmu_driver = {
 202         "PMU",
 203         pmu_probe,
 204         pmu_init,
 205         pmu_send_request,
 206         pmu_adb_autopoll,
 207         pmu_poll_adb,
 208         pmu_adb_reset_bus
 209 };
 210 #endif /* CONFIG_ADB */
 211
 212 extern void low_sleep_handler(void);
 213 extern void enable_kernel_altivec(void);
 214 extern void enable_kernel_fp(void);
 215
 216 #ifdef DEBUG_SLEEP
 217 int pmu_polled_request(struct adb_request *req);
 218 void pmu_blink(int n);
 219 #endif
 220
 221 /*
 222  * This table indicates for each PMU opcode:
 223  * - the number of data bytes to be sent with the command, or -1
 224  *   if a length byte should be sent,
 225  * - the number of response bytes which the PMU will return, or
 226  *   -1 if it will send a length byte.
 227  */
 228 static const s8 pmu_data_len[256][2] = {
 229 /*         0       1       2       3       4       5       6       7  */
 230 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 231 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 232 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 233 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 234 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 235 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 236 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 237 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 238 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 239 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 240 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 241 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 242 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 243 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 244 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 245 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 246 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 247 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 248 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 249 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 250 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 251 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 252 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 253 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 254 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 255 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 256 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 257 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 258 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 259 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 260 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 261 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 262 };
 263
 264 static char *pbook_type[] = {
 265         "Unknown PowerBook",
 266         "PowerBook 2400/3400/3500(G3)",
 267         "PowerBook G3 Series",
 268         "1999 PowerBook G3",
 269         "Core99"
 270 };
 271
 272 int __init find_via_pmu(void)
 273 {
 274         u64 taddr;
 275         const u32 *reg;
 276
 277         if (via != 0)
 278                 return 1;
 279         vias = of_find_node_by_name(NULL, "via-pmu");
 280         if (vias == NULL)
 281                 return 0;
 282
 283         reg = of_get_property(vias, "reg", NULL);
 284         if (reg == NULL) {
 285                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 286                 goto fail;
 287         }
 288         taddr = of_translate_address(vias, reg);
 289         if (taddr == OF_BAD_ADDR) {
 290                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 291                 goto fail;
 292         }
 293
 294         spin_lock_init(&pmu_lock);
 295
 296         pmu_has_adb = 1;
 297
 298         pmu_intr_mask = PMU_INT_PCEJECT |
 299                         PMU_INT_SNDBRT |
 300                         PMU_INT_ADB |
 301                         PMU_INT_TICK;
 302
 303         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 304             || of_device_is_compatible(vias->parent, "ohare")))
 305                 pmu_kind = PMU_OHARE_BASED;
 306         else if (of_device_is_compatible(vias->parent, "paddington"))
 307                 pmu_kind = PMU_PADDINGTON_BASED;
 308         else if (of_device_is_compatible(vias->parent, "heathrow"))
 309                 pmu_kind = PMU_HEATHROW_BASED;
 310         else if (of_device_is_compatible(vias->parent, "Keylargo")
 311                  || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
 312                 struct device_node *gpiop;
 313                 struct device_node *adbp;
 314                 u64 gaddr = OF_BAD_ADDR;
 315
 316                 pmu_kind = PMU_KEYLARGO_BASED;
 317                 adbp = of_find_node_by_type(NULL, "adb");
 318                 pmu_has_adb = (adbp != NULL);
 319                 of_node_put(adbp);
 320                 pmu_intr_mask = PMU_INT_PCEJECT |
 321                                 PMU_INT_SNDBRT |
 322                                 PMU_INT_ADB |
 323                                 PMU_INT_TICK |
 324                                 PMU_INT_ENVIRONMENT;
 325
 326                 gpiop = of_find_node_by_name(NULL, "gpio");
 327                 if (gpiop) {
 328                         reg = of_get_property(gpiop, "reg", NULL);
 329                         if (reg)
 330                                 gaddr = of_translate_address(gpiop, reg);
 331                         if (gaddr != OF_BAD_ADDR)
 332                                 gpio_reg = ioremap(gaddr, 0x10);
 333                 }
 334                 if (gpio_reg == NULL) {
 335                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 336                         goto fail_gpio;
 337                 }
 338         } else
 339                 pmu_kind = PMU_UNKNOWN;
 340
 341         via = ioremap(taddr, 0x2000);
 342         if (via == NULL) {
 343                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 344                 goto fail;
 345         }
 346
 347         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 348         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 349
 350         pmu_state = idle;
 351
 352         if (!init_pmu()) {
 353                 via = NULL;
 354                 return 0;
 355         }
 356
 357         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 358                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 359
 360         sys_ctrler = SYS_CTRLER_PMU;
 361
 362         return 1;
 363  fail:
 364         of_node_put(vias);
 365         iounmap(gpio_reg);
 366         gpio_reg = NULL;
 367  fail_gpio:
 368         vias = NULL;
 369         return 0;
 370 }
 371
 372 #ifdef CONFIG_ADB
 373 static int pmu_probe(void)
 374 {
 375         return vias == NULL? -ENODEV: 0;
 376 }
 377
 378 static int __init pmu_init(void)
 379 {
 380         if (vias == NULL)
 381                 return -ENODEV;
 382         return 0;
 383 }
 384 #endif /* CONFIG_ADB */
 385
 386 /*
 387  * We can't wait until pmu_init gets called, that happens too late.
 388  * It happens after IDE and SCSI initialization, which can take a few
 389  * seconds, and by that time the PMU could have given up on us and
 390  * turned us off.
 391  * Thus this is called with arch_initcall rather than device_initcall.
 392  */
 393 static int __init via_pmu_start(void)
 394 {
 395         unsigned int irq;
 396
 397         if (vias == NULL)
 398                 return -ENODEV;
 399
 400         batt_req.complete = 1;
 401
 402         irq = irq_of_parse_and_map(vias, 0);
 403         if (irq == NO_IRQ) {
 404                 printk(KERN_ERR "via-pmu: can't map interrupt\n");
 405                 return -ENODEV;
 406         }
 407         if (request_irq(irq, via_pmu_interrupt, 0, "VIA-PMU", (void *)0)) {
 408                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 409                 return -ENODEV;
 410         }
 411
 412         if (pmu_kind == PMU_KEYLARGO_BASED) {
 413                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 414                 if (gpio_node == NULL)
 415                         gpio_node = of_find_node_by_name(NULL,
 416                                                          "pmu-interrupt");
 417                 if (gpio_node)
 418                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 419
 420                 if (gpio_irq != NO_IRQ) {
 421                         if (request_irq(gpio_irq, gpio1_interrupt, 0,
 422                                         "GPIO1 ADB", (void *)0))
 423                                 printk(KERN_ERR "pmu: can't get irq %d"
 424                                        " (GPIO1)\n", gpio_irq);
 425                         else
 426                                 gpio_irq_enabled = 1;
 427                 }
 428         }
 429
 430         /* Enable interrupts */
 431         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 432
 433         pmu_fully_inited = 1;
 434
 435         /* Make sure PMU settle down before continuing. This is _very_ important
 436          * since the IDE probe may shut interrupts down for quite a bit of time. If
 437          * a PMU communication is pending while this happens, the PMU may timeout
 438          * Not that on Core99 machines, the PMU keeps sending us environement
 439          * messages, we should find a way to either fix IDE or make it call
 440          * pmu_suspend() before masking interrupts. This can also happens while
 441          * scolling with some fbdevs.
 442          */
 443         do {
 444                 pmu_poll();
 445         } while (pmu_state != idle);
 446
 447         return 0;
 448 }
 449
 450 arch_initcall(via_pmu_start);
 451
 452 /*
 453  * This has to be done after pci_init, which is a subsys_initcall.
 454  */
 455 static int __init via_pmu_dev_init(void)
 456 {
 457         if (vias == NULL)
 458                 return -ENODEV;
 459
 460 #ifdef CONFIG_PMAC_BACKLIGHT
 461         /* Initialize backlight */
 462         pmu_backlight_init();
 463 #endif
 464
 465 #ifdef CONFIG_PPC32
 466         if (machine_is_compatible("AAPL,3400/2400") ||
 467                 machine_is_compatible("AAPL,3500")) {
 468                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 469                         NULL, PMAC_MB_INFO_MODEL, 0);
 470                 pmu_battery_count = 1;
 471                 if (mb == PMAC_TYPE_COMET)
 472                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 473                 else
 474                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 475         } else if (machine_is_compatible("AAPL,PowerBook1998") ||
 476                 machine_is_compatible("PowerBook1,1")) {
 477                 pmu_battery_count = 2;
 478                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 479                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 480         } else {
 481                 struct device_node* prim =
 482                         of_find_node_by_name(NULL, "power-mgt");
 483                 const u32 *prim_info = NULL;
 484                 if (prim)
 485                         prim_info = of_get_property(prim, "prim-info", NULL);
 486                 if (prim_info) {
 487                         /* Other stuffs here yet unknown */
 488                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 489                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 490                         if (pmu_battery_count > 1)
 491                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 492                 }
 493                 of_node_put(prim);
 494         }
 495 #endif /* CONFIG_PPC32 */
 496
 497         /* Create /proc/pmu */
 498         proc_pmu_root = proc_mkdir("pmu", NULL);
 499         if (proc_pmu_root) {
 500                 long i;
 501
 502                 for (i=0; i<pmu_battery_count; i++) {
 503                         char title[16];
 504                         sprintf(title, "battery_%ld", i);
 505                         proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
 506                                                 proc_get_batt, (void *)i);
 507                 }
 508
 509                 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
 510                                         proc_get_info, NULL);
 511                 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
 512                                         proc_get_irqstats, NULL);
 513                 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
 514                 if (proc_pmu_options) {
 515                         proc_pmu_options->read_proc = proc_read_options;
 516                         proc_pmu_options->write_proc = proc_write_options;
 517                 }
 518         }
 519         return 0;
 520 }
 521
 522 device_initcall(via_pmu_dev_init);
 523
 524 static int
 525 init_pmu(void)
 526 {
 527         int timeout;
 528         struct adb_request req;
 529
 530         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 531         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 532
 533         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 534         timeout =  100000;
 535         while (!req.complete) {
 536                 if (--timeout < 0) {
 537                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 538                         return 0;
 539                 }
 540                 udelay(10);
 541                 pmu_poll();
 542         }
 543
 544         /* ack all pending interrupts */
 545         timeout = 100000;
 546         interrupt_data[0][0] = 1;
 547         while (interrupt_data[0][0] || pmu_state != idle) {
 548                 if (--timeout < 0) {
 549                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 550                         return 0;
 551                 }
 552                 if (pmu_state == idle)
 553                         adb_int_pending = 1;
 554                 via_pmu_interrupt(0, NULL);
 555                 udelay(10);
 556         }
 557
 558         /* Tell PMU we are ready.  */
 559         if (pmu_kind == PMU_KEYLARGO_BASED) {
 560                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 561                 while (!req.complete)
 562                         pmu_poll();
 563         }
 564
 565         /* Read PMU version */
 566         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 567         pmu_wait_complete(&req);
 568         if (req.reply_len > 0)
 569                 pmu_version = req.reply[0];
 570
 571         /* Read server mode setting */
 572         if (pmu_kind == PMU_KEYLARGO_BASED) {
 573                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 574                             PMU_PWR_GET_POWERUP_EVENTS);
 575                 pmu_wait_complete(&req);
 576                 if (req.reply_len == 2) {
 577                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 578                                 option_server_mode = 1;
 579                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 580                                option_server_mode ? "enabled" : "disabled");
 581                 }
 582         }
 583         return 1;
 584 }
 585
 586 int
 587 pmu_get_model(void)
 588 {
 589         return pmu_kind;
 590 }
 591
 592 static void pmu_set_server_mode(int server_mode)
 593 {
 594         struct adb_request req;
 595
 596         if (pmu_kind != PMU_KEYLARGO_BASED)
 597                 return;
 598
 599         option_server_mode = server_mode;
 600         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 601         pmu_wait_complete(&req);
 602         if (req.reply_len < 2)
 603                 return;
 604         if (server_mode)
 605                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 606                             PMU_PWR_SET_POWERUP_EVENTS,
 607                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 608         else
 609                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 610                             PMU_PWR_CLR_POWERUP_EVENTS,
 611                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 612         pmu_wait_complete(&req);
 613 }
 614
 615 /* This new version of the code for 2400/3400/3500 powerbooks
 616  * is inspired from the implementation in gkrellm-pmu
 617  */
 618 static void
 619 done_battery_state_ohare(struct adb_request* req)
 620 {
 621         /* format:
 622          *  [0]    :  flags
 623          *    0x01 :  AC indicator
 624          *    0x02 :  charging
 625          *    0x04 :  battery exist
 626          *    0x08 :
 627          *    0x10 :
 628          *    0x20 :  full charged
 629          *    0x40 :  pcharge reset
 630          *    0x80 :  battery exist
 631          *
 632          *  [1][2] :  battery voltage
 633          *  [3]    :  CPU temperature
 634          *  [4]    :  battery temperature
 635          *  [5]    :  current
 636          *  [6][7] :  pcharge
 637          *              --tkoba
 638          */
 639         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 640         long pcharge, charge, vb, vmax, lmax;
 641         long vmax_charging, vmax_charged;
 642         long amperage, voltage, time, max;
 643         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 644                         NULL, PMAC_MB_INFO_MODEL, 0);
 645
 646         if (req->reply[0] & 0x01)
 647                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 648         else
 649                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 650
 651         if (mb == PMAC_TYPE_COMET) {
 652                 vmax_charged = 189;
 653                 vmax_charging = 213;
 654                 lmax = 6500;
 655         } else {
 656                 vmax_charged = 330;
 657                 vmax_charging = 330;
 658                 lmax = 6500;
 659         }
 660         vmax = vmax_charged;
 661
 662         /* If battery installed */
 663         if (req->reply[0] & 0x04) {
 664                 bat_flags |= PMU_BATT_PRESENT;
 665                 if (req->reply[0] & 0x02)
 666                         bat_flags |= PMU_BATT_CHARGING;
 667                 vb = (req->reply[1] << 8) | req->reply[2];
 668                 voltage = (vb * 265 + 72665) / 10;
 669                 amperage = req->reply[5];
 670                 if ((req->reply[0] & 0x01) == 0) {
 671                         if (amperage > 200)
 672                                 vb += ((amperage - 200) * 15)/100;
 673                 } else if (req->reply[0] & 0x02) {
 674                         vb = (vb * 97) / 100;
 675                         vmax = vmax_charging;
 676                 }
 677                 charge = (100 * vb) / vmax;
 678                 if (req->reply[0] & 0x40) {
 679                         pcharge = (req->reply[6] << 8) + req->reply[7];
 680                         if (pcharge > lmax)
 681                                 pcharge = lmax;
 682                         pcharge *= 100;
 683                         pcharge = 100 - pcharge / lmax;
 684                         if (pcharge < charge)
 685                                 charge = pcharge;
 686                 }
 687                 if (amperage > 0)
 688                         time = (charge * 16440) / amperage;
 689                 else
 690                         time = 0;
 691                 max = 100;
 692                 amperage = -amperage;
 693         } else
 694                 charge = max = amperage = voltage = time = 0;
 695
 696         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 697         pmu_batteries[pmu_cur_battery].charge = charge;
 698         pmu_batteries[pmu_cur_battery].max_charge = max;
 699         pmu_batteries[pmu_cur_battery].amperage = amperage;
 700         pmu_batteries[pmu_cur_battery].voltage = voltage;
 701         pmu_batteries[pmu_cur_battery].time_remaining = time;
 702
 703         clear_bit(0, &async_req_locks);
 704 }
 705
 706 static void
 707 done_battery_state_smart(struct adb_request* req)
 708 {
 709         /* format:
 710          *  [0] : format of this structure (known: 3,4,5)
 711          *  [1] : flags
 712          *
 713          *  format 3 & 4:
 714          *
 715          *  [2] : charge
 716          *  [3] : max charge
 717          *  [4] : current
 718          *  [5] : voltage
 719          *
 720          *  format 5:
 721          *
 722          *  [2][3] : charge
 723          *  [4][5] : max charge
 724          *  [6][7] : current
 725          *  [8][9] : voltage
 726          */
 727
 728         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 729         int amperage;
 730         unsigned int capa, max, voltage;
 731
 732         if (req->reply[1] & 0x01)
 733                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 734         else
 735                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 736
 737
 738         capa = max = amperage = voltage = 0;
 739
 740         if (req->reply[1] & 0x04) {
 741                 bat_flags |= PMU_BATT_PRESENT;
 742                 switch(req->reply[0]) {
 743                         case 3:
 744                         case 4: capa = req->reply[2];
 745                                 max = req->reply[3];
 746                                 amperage = *((signed char *)&req->reply[4]);
 747                                 voltage = req->reply[5];
 748                                 break;
 749                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 750                                 max = (req->reply[4] << 8) | req->reply[5];
 751                                 amperage = *((signed short *)&req->reply[6]);
 752                                 voltage = (req->reply[8] << 8) | req->reply[9];
 753                                 break;
 754                         default:
 755                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 756                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 757                                 break;
 758                 }
 759         }
 760
 761         if ((req->reply[1] & 0x01) && (amperage > 0))
 762                 bat_flags |= PMU_BATT_CHARGING;
 763
 764         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 765         pmu_batteries[pmu_cur_battery].charge = capa;
 766         pmu_batteries[pmu_cur_battery].max_charge = max;
 767         pmu_batteries[pmu_cur_battery].amperage = amperage;
 768         pmu_batteries[pmu_cur_battery].voltage = voltage;
 769         if (amperage) {
 770                 if ((req->reply[1] & 0x01) && (amperage > 0))
 771                         pmu_batteries[pmu_cur_battery].time_remaining
 772                                 = ((max-capa) * 3600) / amperage;
 773                 else
 774                         pmu_batteries[pmu_cur_battery].time_remaining
 775                                 = (capa * 3600) / (-amperage);
 776         } else
 777                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 778
 779         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 780
 781         clear_bit(0, &async_req_locks);
 782 }
 783
 784 static void
 785 query_battery_state(void)
 786 {
 787         if (test_and_set_bit(0, &async_req_locks))
 788                 return;
 789         if (pmu_kind == PMU_OHARE_BASED)
 790                 pmu_request(&batt_req, done_battery_state_ohare,
 791                         1, PMU_BATTERY_STATE);
 792         else
 793                 pmu_request(&batt_req, done_battery_state_smart,
 794                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 795 }
 796
 797 static int
 798 proc_get_info(char *page, char **start, off_t off,
 799                 int count, int *eof, void *data)
 800 {
 801         char* p = page;
 802
 803         p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 804         p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
 805         p += sprintf(p, "AC Power               : %d\n",
 806                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 807         p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);
 808
 809         return p - page;
 810 }
 811
 812 static int
 813 proc_get_irqstats(char *page, char **start, off_t off,
 814                   int count, int *eof, void *data)
 815 {
 816         int i;
 817         char* p = page;
 818         static const char *irq_names[] = {
 819                 "Total CB1 triggered events",
 820                 "Total GPIO1 triggered events",
 821                 "PC-Card eject button",
 822                 "Sound/Brightness button",
 823                 "ADB message",
 824                 "Battery state change",
 825                 "Environment interrupt",
 826                 "Tick timer",
 827                 "Ghost interrupt (zero len)",
 828                 "Empty interrupt (empty mask)",
 829                 "Max irqs in a row"
 830         };
 831
 832         for (i=0; i<11; i++) {
 833                 p += sprintf(p, " %2u: %10u (%s)\n",
 834                              i, pmu_irq_stats[i], irq_names[i]);
 835         }
 836         return p - page;
 837 }
 838
 839 static int
 840 proc_get_batt(char *page, char **start, off_t off,
 841                 int count, int *eof, void *data)
 842 {
 843         long batnum = (long)data;
 844         char *p = page;
 845
 846         p += sprintf(p, "\n");
 847         p += sprintf(p, "flags      : %08x\n",
 848                 pmu_batteries[batnum].flags);
 849         p += sprintf(p, "charge     : %d\n",
 850                 pmu_batteries[batnum].charge);
 851         p += sprintf(p, "max_charge : %d\n",
 852                 pmu_batteries[batnum].max_charge);
 853         p += sprintf(p, "current    : %d\n",
 854                 pmu_batteries[batnum].amperage);
 855         p += sprintf(p, "voltage    : %d\n",
 856                 pmu_batteries[batnum].voltage);
 857         p += sprintf(p, "time rem.  : %d\n",
 858                 pmu_batteries[batnum].time_remaining);
 859
 860         return p - page;
 861 }
 862
 863 static int
 864 proc_read_options(char *page, char **start, off_t off,
 865                         int count, int *eof, void *data)
 866 {
 867         char *p = page;
 868
 869 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 870         if (pmu_kind == PMU_KEYLARGO_BASED &&
 871             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 872                 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
 873 #endif
 874         if (pmu_kind == PMU_KEYLARGO_BASED)
 875                 p += sprintf(p, "server_mode=%d\n", option_server_mode);
 876
 877         return p - page;
 878 }
 879
 880 static int
 881 proc_write_options(struct file *file, const char __user *buffer,
 882                         unsigned long count, void *data)
 883 {
 884         char tmp[33];
 885         char *label, *val;
 886         unsigned long fcount = count;
 887
 888         if (!count)
 889                 return -EINVAL;
 890         if (count > 32)
 891                 count = 32;
 892         if (copy_from_user(tmp, buffer, count))
 893                 return -EFAULT;
 894         tmp[count] = 0;
 895
 896         label = tmp;
 897         while(*label == ' ')
 898                 label++;
 899         val = label;
 900         while(*val && (*val != '=')) {
 901                 if (*val == ' ')
 902                         *val = 0;
 903                 val++;
 904         }
 905         if ((*val) == 0)
 906                 return -EINVAL;
 907         *(val++) = 0;
 908         while(*val == ' ')
 909                 val++;
 910 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 911         if (pmu_kind == PMU_KEYLARGO_BASED &&
 912             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 913                 if (!strcmp(label, "lid_wakeup"))
 914                         option_lid_wakeup = ((*val) == '1');
 915 #endif
 916         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 917                 int new_value;
 918                 new_value = ((*val) == '1');
 919                 if (new_value != option_server_mode)
 920                         pmu_set_server_mode(new_value);
 921         }
 922         return fcount;
 923 }
 924
 925 #ifdef CONFIG_ADB
 926 /* Send an ADB command */
 927 static int
 928 pmu_send_request(struct adb_request *req, int sync)
 929 {
 930         int i, ret;
 931
 932         if ((vias == NULL) || (!pmu_fully_inited)) {
 933                 req->complete = 1;
 934                 return -ENXIO;
 935         }
 936
 937         ret = -EINVAL;
 938
 939         switch (req->data[0]) {
 940         case PMU_PACKET:
 941                 for (i = 0; i < req->nbytes - 1; ++i)
 942                         req->data[i] = req->data[i+1];
 943                 --req->nbytes;
 944                 if (pmu_data_len[req->data[0]][1] != 0) {
 945                         req->reply[0] = ADB_RET_OK;
 946                         req->reply_len = 1;
 947                 } else
 948                         req->reply_len = 0;
 949                 ret = pmu_queue_request(req);
 950                 break;
 951         case CUDA_PACKET:
 952                 switch (req->data[1]) {
 953                 case CUDA_GET_TIME:
 954                         if (req->nbytes != 2)
 955                                 break;
 956                         req->data[0] = PMU_READ_RTC;
 957                         req->nbytes = 1;
 958                         req->reply_len = 3;
 959                         req->reply[0] = CUDA_PACKET;
 960                         req->reply[1] = 0;
 961                         req->reply[2] = CUDA_GET_TIME;
 962                         ret = pmu_queue_request(req);
 963                         break;
 964                 case CUDA_SET_TIME:
 965                         if (req->nbytes != 6)
 966                                 break;
 967                         req->data[0] = PMU_SET_RTC;
 968                         req->nbytes = 5;
 969                         for (i = 1; i <= 4; ++i)
 970                                 req->data[i] = req->data[i+1];
 971                         req->reply_len = 3;
 972                         req->reply[0] = CUDA_PACKET;
 973                         req->reply[1] = 0;
 974                         req->reply[2] = CUDA_SET_TIME;
 975                         ret = pmu_queue_request(req);
 976                         break;
 977                 }
 978                 break;
 979         case ADB_PACKET:
 980                 if (!pmu_has_adb)
 981                         return -ENXIO;
 982                 for (i = req->nbytes - 1; i > 1; --i)
 983                         req->data[i+2] = req->data[i];
 984                 req->data[3] = req->nbytes - 2;
 985                 req->data[2] = pmu_adb_flags;
 986                 /*req->data[1] = req->data[1];*/
 987                 req->data[0] = PMU_ADB_CMD;
 988                 req->nbytes += 2;
 989                 req->reply_expected = 1;
 990                 req->reply_len = 0;
 991                 ret = pmu_queue_request(req);
 992                 break;
 993         }
 994         if (ret) {
 995                 req->complete = 1;
 996                 return ret;
 997         }
 998
 999         if (sync)
1000                 while (!req->complete)
1001                         pmu_poll();
1002
1003         return 0;
1004 }
1005
1006 /* Enable/disable autopolling */
1007 static int
1008 pmu_adb_autopoll(int devs)
1009 {
1010         struct adb_request req;
1011
1012         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1013                 return -ENXIO;
1014
1015         if (devs) {
1016                 adb_dev_map = devs;
1017                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1018                             adb_dev_map >> 8, adb_dev_map);
1019                 pmu_adb_flags = 2;
1020         } else {
1021                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1022                 pmu_adb_flags = 0;
1023         }
1024         while (!req.complete)
1025                 pmu_poll();
1026         return 0;
1027 }
1028
1029 /* Reset the ADB bus */
1030 static int
1031 pmu_adb_reset_bus(void)
1032 {
1033         struct adb_request req;
1034         int save_autopoll = adb_dev_map;
1035
1036         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1037                 return -ENXIO;
1038
1039         /* anyone got a better idea?? */
1040         pmu_adb_autopoll(0);
1041
1042         req.nbytes = 5;
1043         req.done = NULL;
1044         req.data[0] = PMU_ADB_CMD;
1045         req.data[1] = 0;
1046         req.data[2] = ADB_BUSRESET;
1047         req.data[3] = 0;
1048         req.data[4] = 0;
1049         req.reply_len = 0;
1050         req.reply_expected = 1;
1051         if (pmu_queue_request(&req) != 0) {
1052                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1053                 return -EIO;
1054         }
1055         pmu_wait_complete(&req);
1056
1057         if (save_autopoll != 0)
1058                 pmu_adb_autopoll(save_autopoll);
1059
1060         return 0;
1061 }
1062 #endif /* CONFIG_ADB */
1063
1064 /* Construct and send a pmu request */
1065 int
1066 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1067             int nbytes, ...)
1068 {
1069         va_list list;
1070         int i;
1071
1072         if (vias == NULL)
1073                 return -ENXIO;
1074
1075         if (nbytes < 0 || nbytes > 32) {
1076                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1077                 req->complete = 1;
1078                 return -EINVAL;
1079         }
1080         req->nbytes = nbytes;
1081         req->done = done;
1082         va_start(list, nbytes);
1083         for (i = 0; i < nbytes; ++i)
1084                 req->data[i] = va_arg(list, int);
1085         va_end(list);
1086         req->reply_len = 0;
1087         req->reply_expected = 0;
1088         return pmu_queue_request(req);
1089 }
1090
1091 int
1092 pmu_queue_request(struct adb_request *req)
1093 {
1094         unsigned long flags;
1095         int nsend;
1096
1097         if (via == NULL) {
1098                 req->complete = 1;
1099                 return -ENXIO;
1100         }
1101         if (req->nbytes <= 0) {
1102                 req->complete = 1;
1103                 return 0;
1104         }
1105         nsend = pmu_data_len[req->data[0]][0];
1106         if (nsend >= 0 && req->nbytes != nsend + 1) {
1107                 req->complete = 1;
1108                 return -EINVAL;
1109         }
1110
1111         req->next = NULL;
1112         req->sent = 0;
1113         req->complete = 0;
1114
1115         spin_lock_irqsave(&pmu_lock, flags);
1116         if (current_req != 0) {
1117                 last_req->next = req;
1118                 last_req = req;
1119         } else {
1120                 current_req = req;
1121                 last_req = req;
1122                 if (pmu_state == idle)
1123                         pmu_start();
1124         }
1125         spin_unlock_irqrestore(&pmu_lock, flags);
1126
1127         return 0;
1128 }
1129
1130 static inline void
1131 wait_for_ack(void)
1132 {
1133         /* Sightly increased the delay, I had one occurrence of the message
1134          * reported
1135          */
1136         int timeout = 4000;
1137         while ((in_8(&via[B]) & TACK) == 0) {
1138                 if (--timeout < 0) {
1139                         printk(KERN_ERR "PMU not responding (!ack)\n");
1140                         return;
1141                 }
1142                 udelay(10);
1143         }
1144 }
1145
1146 /* New PMU seems to be very sensitive to those timings, so we make sure
1147  * PCI is flushed immediately */
1148 static inline void
1149 send_byte(int x)
1150 {
1151         volatile unsigned char __iomem *v = via;
1152
1153         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1154         out_8(&v[SR], x);
1155         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1156         (void)in_8(&v[B]);
1157 }
1158
1159 static inline void
1160 recv_byte(void)
1161 {
1162         volatile unsigned char __iomem *v = via;
1163
1164         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1165         in_8(&v[SR]);           /* resets SR */
1166         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1167         (void)in_8(&v[B]);
1168 }
1169
1170 static inline void
1171 pmu_done(struct adb_request *req)
1172 {
1173         void (*done)(struct adb_request *) = req->done;
1174         mb();
1175         req->complete = 1;
1176         /* Here, we assume that if the request has a done member, the
1177          * struct request will survive to setting req->complete to 1
1178          */
1179         if (done)
1180                 (*done)(req);
1181 }
1182
1183 static void
1184 pmu_start(void)
1185 {
1186         struct adb_request *req;
1187
1188         /* assert pmu_state == idle */
1189         /* get the packet to send */
1190         req = current_req;
1191         if (req == 0 || pmu_state != idle
1192             || (/*req->reply_expected && */req_awaiting_reply))
1193                 return;
1194
1195         pmu_state = sending;
1196         data_index = 1;
1197         data_len = pmu_data_len[req->data[0]][0];
1198
1199         /* Sounds safer to make sure ACK is high before writing. This helped
1200          * kill a problem with ADB and some iBooks
1201          */
1202         wait_for_ack();
1203         /* set the shift register to shift out and send a byte */
1204         send_byte(req->data[0]);
1205 }
1206
1207 void
1208 pmu_poll(void)
1209 {
1210         if (!via)
1211                 return;
1212         if (disable_poll)
1213                 return;
1214         via_pmu_interrupt(0, NULL);
1215 }
1216
1217 void
1218 pmu_poll_adb(void)
1219 {
1220         if (!via)
1221                 return;
1222         if (disable_poll)
1223                 return;
1224         /* Kicks ADB read when PMU is suspended */
1225         adb_int_pending = 1;
1226         do {
1227                 via_pmu_interrupt(0, NULL);
1228         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1229                 || req_awaiting_reply));
1230 }
1231
1232 void
1233 pmu_wait_complete(struct adb_request *req)
1234 {
1235         if (!via)
1236                 return;
1237         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1238                 via_pmu_interrupt(0, NULL);
1239 }
1240
1241 /* This function loops until the PMU is idle and prevents it from
1242  * anwsering to ADB interrupts. pmu_request can still be called.
1243  * This is done to avoid spurrious shutdowns when we know we'll have
1244  * interrupts switched off for a long time
1245  */
1246 void
1247 pmu_suspend(void)
1248 {
1249         unsigned long flags;
1250
1251         if (!via)
1252                 return;
1253
1254         spin_lock_irqsave(&pmu_lock, flags);
1255         pmu_suspended++;
1256         if (pmu_suspended > 1) {
1257                 spin_unlock_irqrestore(&pmu_lock, flags);
1258                 return;
1259         }
1260
1261         do {
1262                 spin_unlock_irqrestore(&pmu_lock, flags);
1263                 if (req_awaiting_reply)
1264                         adb_int_pending = 1;
1265                 via_pmu_interrupt(0, NULL);
1266                 spin_lock_irqsave(&pmu_lock, flags);
1267                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1268                         if (gpio_irq >= 0)
1269                                 disable_irq_nosync(gpio_irq);
1270                         out_8(&via[IER], CB1_INT | IER_CLR);
1271                         spin_unlock_irqrestore(&pmu_lock, flags);
1272                         break;
1273                 }
1274         } while (1);
1275 }
1276
1277 void
1278 pmu_resume(void)
1279 {
1280         unsigned long flags;
1281
1282         if (!via || (pmu_suspended < 1))
1283                 return;
1284
1285         spin_lock_irqsave(&pmu_lock, flags);
1286         pmu_suspended--;
1287         if (pmu_suspended > 0) {
1288                 spin_unlock_irqrestore(&pmu_lock, flags);
1289                 return;
1290         }
1291         adb_int_pending = 1;
1292         if (gpio_irq >= 0)
1293                 enable_irq(gpio_irq);
1294         out_8(&via[IER], CB1_INT | IER_SET);
1295         spin_unlock_irqrestore(&pmu_lock, flags);
1296         pmu_poll();
1297 }
1298
1299 /* Interrupt data could be the result data from an ADB cmd */
1300 static void
1301 pmu_handle_data(unsigned char *data, int len)
1302 {
1303         unsigned char ints, pirq;
1304         int i = 0;
1305
1306         asleep = 0;
1307         if (drop_interrupts || len < 1) {
1308                 adb_int_pending = 0;
1309                 pmu_irq_stats[8]++;
1310                 return;
1311         }
1312
1313         /* Get PMU interrupt mask */
1314         ints = data[0];
1315
1316         /* Record zero interrupts for stats */
1317         if (ints == 0)
1318                 pmu_irq_stats[9]++;
1319
1320         /* Hack to deal with ADB autopoll flag */
1321         if (ints & PMU_INT_ADB)
1322                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1323
1324 next:
1325
1326         if (ints == 0) {
1327                 if (i > pmu_irq_stats[10])
1328                         pmu_irq_stats[10] = i;
1329                 return;
1330         }
1331
1332         for (pirq = 0; pirq < 8; pirq++)
1333                 if (ints & (1 << pirq))
1334                         break;
1335         pmu_irq_stats[pirq]++;
1336         i++;
1337         ints &= ~(1 << pirq);
1338
1339         /* Note: for some reason, we get an interrupt with len=1,
1340          * data[0]==0 after each normal ADB interrupt, at least
1341          * on the Pismo. Still investigating...  --BenH
1342          */
1343         if ((1 << pirq) & PMU_INT_ADB) {
1344                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1345                         struct adb_request *req = req_awaiting_reply;
1346                         if (req == 0) {
1347                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1348                                 return;
1349                         }
1350                         req_awaiting_reply = NULL;
1351                         if (len <= 2)
1352                                 req->reply_len = 0;
1353                         else {
1354                                 memcpy(req->reply, data + 1, len - 1);
1355                                 req->reply_len = len - 1;
1356                         }
1357                         pmu_done(req);
1358                 } else {
1359                         if (len == 4 && data[1] == 0x2c) {
1360                                 extern int xmon_wants_key, xmon_adb_keycode;
1361                                 if (xmon_wants_key) {
1362                                         xmon_adb_keycode = data[2];
1363                                         return;
1364                                 }
1365                         }
1366 #ifdef CONFIG_ADB
1367                         /*
1368                          * XXX On the [23]400 the PMU gives us an up
1369                          * event for keycodes 0x74 or 0x75 when the PC
1370                          * card eject buttons are released, so we
1371                          * ignore those events.
1372                          */
1373                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1374                               && data[1] == 0x2c && data[3] == 0xff
1375                               && (data[2] & ~1) == 0xf4))
1376                                 adb_input(data+1, len-1, 1);
1377 #endif /* CONFIG_ADB */
1378                 }
1379         }
1380         /* Sound/brightness button pressed */
1381         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1382 #ifdef CONFIG_PMAC_BACKLIGHT
1383                 if (len == 3)
1384                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1385 #endif
1386         }
1387         /* Tick interrupt */
1388         else if ((1 << pirq) & PMU_INT_TICK) {
1389                 /* Environement or tick interrupt, query batteries */
1390                 if (pmu_battery_count) {
1391                         if ((--query_batt_timer) == 0) {
1392                                 query_battery_state();
1393                                 query_batt_timer = BATTERY_POLLING_COUNT;
1394                         }
1395                 }
1396         }
1397         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1398                 if (pmu_battery_count)
1399                         query_battery_state();
1400                 pmu_pass_intr(data, len);
1401                 /* len == 6 is probably a bad check. But how do I
1402                  * know what PMU versions send what events here? */
1403                 if (len == 6) {
1404                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1405                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1406                 }
1407         } else {
1408                pmu_pass_intr(data, len);
1409         }
1410         goto next;
1411 }
1412
1413 static struct adb_request*
1414 pmu_sr_intr(void)
1415 {
1416         struct adb_request *req;
1417         int bite = 0;
1418
1419         if (via[B] & TREQ) {
1420                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1421                 out_8(&via[IFR], SR_INT);
1422                 return NULL;
1423         }
1424         /* The ack may not yet be low when we get the interrupt */
1425         while ((in_8(&via[B]) & TACK) != 0)
1426                         ;
1427
1428         /* if reading grab the byte, and reset the interrupt */
1429         if (pmu_state == reading || pmu_state == reading_intr)
1430                 bite = in_8(&via[SR]);
1431
1432         /* reset TREQ and wait for TACK to go high */
1433         out_8(&via[B], in_8(&via[B]) | TREQ);
1434         wait_for_ack();
1435
1436         switch (pmu_state) {
1437         case sending:
1438                 req = current_req;
1439                 if (data_len < 0) {
1440                         data_len = req->nbytes - 1;
1441                         send_byte(data_len);
1442                         break;
1443                 }
1444                 if (data_index <= data_len) {
1445                         send_byte(req->data[data_index++]);
1446                         break;
1447                 }
1448                 req->sent = 1;
1449                 data_len = pmu_data_len[req->data[0]][1];
1450                 if (data_len == 0) {
1451                         pmu_state = idle;
1452                         current_req = req->next;
1453                         if (req->reply_expected)
1454                                 req_awaiting_reply = req;
1455                         else
1456                                 return req;
1457                 } else {
1458                         pmu_state = reading;
1459                         data_index = 0;
1460                         reply_ptr = req->reply + req->reply_len;
1461                         recv_byte();
1462                 }
1463                 break;
1464
1465         case intack:
1466                 data_index = 0;
1467                 data_len = -1;
1468                 pmu_state = reading_intr;
1469                 reply_ptr = interrupt_data[int_data_last];
1470                 recv_byte();
1471                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1472                         enable_irq(gpio_irq);
1473                         gpio_irq_enabled = 1;
1474                 }
1475                 break;
1476
1477         case reading:
1478         case reading_intr:
1479                 if (data_len == -1) {
1480                         data_len = bite;
1481                         if (bite > 32)
1482                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1483                 } else if (data_index < 32) {
1484                         reply_ptr[data_index++] = bite;
1485                 }
1486                 if (data_index < data_len) {
1487                         recv_byte();
1488                         break;
1489                 }
1490
1491                 if (pmu_state == reading_intr) {
1492                         pmu_state = idle;
1493                         int_data_state[int_data_last] = int_data_ready;
1494                         interrupt_data_len[int_data_last] = data_len;
1495                 } else {
1496                         req = current_req;
1497                         /*
1498                          * For PMU sleep and freq change requests, we lock the
1499                          * PMU until it's explicitly unlocked. This avoids any
1500                          * spurrious event polling getting in
1501                          */
1502                         current_req = req->next;
1503                         req->reply_len += data_index;
1504                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1505                                 pmu_state = locked;
1506                         else
1507                                 pmu_state = idle;
1508                         return req;
1509                 }
1510                 break;
1511
1512         default:
1513                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1514                        pmu_state);
1515         }
1516         return NULL;
1517 }
1518
1519 static irqreturn_t
1520 via_pmu_interrupt(int irq, void *arg)
1521 {
1522         unsigned long flags;
1523         int intr;
1524         int nloop = 0;
1525         int int_data = -1;
1526         struct adb_request *req = NULL;
1527         int handled = 0;
1528
1529         /* This is a bit brutal, we can probably do better */
1530         spin_lock_irqsave(&pmu_lock, flags);
1531         ++disable_poll;
1532
1533         for (;;) {
1534                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1535                 if (intr == 0)
1536                         break;
1537                 handled = 1;
1538                 if (++nloop > 1000) {
1539                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1540                                "intr=%x, ier=%x pmu_state=%d\n",
1541                                intr, in_8(&via[IER]), pmu_state);
1542                         break;
1543                 }
1544                 out_8(&via[IFR], intr);
1545                 if (intr & CB1_INT) {
1546                         adb_int_pending = 1;
1547                         pmu_irq_stats[0]++;
1548                 }
1549                 if (intr & SR_INT) {
1550                         req = pmu_sr_intr();
1551                         if (req)
1552                                 break;
1553                 }
1554         }
1555
1556 recheck:
1557         if (pmu_state == idle) {
1558                 if (adb_int_pending) {
1559                         if (int_data_state[0] == int_data_empty)
1560                                 int_data_last = 0;
1561                         else if (int_data_state[1] == int_data_empty)
1562                                 int_data_last = 1;
1563                         else
1564                                 goto no_free_slot;
1565                         pmu_state = intack;
1566                         int_data_state[int_data_last] = int_data_fill;
1567                         /* Sounds safer to make sure ACK is high before writing.
1568                          * This helped kill a problem with ADB and some iBooks
1569                          */
1570                         wait_for_ack();
1571                         send_byte(PMU_INT_ACK);
1572                         adb_int_pending = 0;
1573                 } else if (current_req)
1574                         pmu_start();
1575         }
1576 no_free_slot:
1577         /* Mark the oldest buffer for flushing */
1578         if (int_data_state[!int_data_last] == int_data_ready) {
1579                 int_data_state[!int_data_last] = int_data_flush;
1580                 int_data = !int_data_last;
1581         } else if (int_data_state[int_data_last] == int_data_ready) {
1582                 int_data_state[int_data_last] = int_data_flush;
1583                 int_data = int_data_last;
1584         }
1585         --disable_poll;
1586         spin_unlock_irqrestore(&pmu_lock, flags);
1587
1588         /* Deal with completed PMU requests outside of the lock */
1589         if (req) {
1590                 pmu_done(req);
1591                 req = NULL;
1592         }
1593
1594         /* Deal with interrupt datas outside of the lock */
1595         if (int_data >= 0) {
1596                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1597                 spin_lock_irqsave(&pmu_lock, flags);
1598                 ++disable_poll;
1599                 int_data_state[int_data] = int_data_empty;
1600                 int_data = -1;
1601                 goto recheck;
1602         }
1603
1604         return IRQ_RETVAL(handled);
1605 }
1606
1607 void
1608 pmu_unlock(void)
1609 {
1610         unsigned long flags;
1611
1612         spin_lock_irqsave(&pmu_lock, flags);
1613         if (pmu_state == locked)
1614                 pmu_state = idle;
1615         adb_int_pending = 1;
1616         spin_unlock_irqrestore(&pmu_lock, flags);
1617 }
1618
1619
1620 static irqreturn_t
1621 gpio1_interrupt(int irq, void *arg)
1622 {
1623         unsigned long flags;
1624
1625         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1626                 spin_lock_irqsave(&pmu_lock, flags);
1627                 if (gpio_irq_enabled > 0) {
1628                         disable_irq_nosync(gpio_irq);
1629                         gpio_irq_enabled = 0;
1630                 }
1631                 pmu_irq_stats[1]++;
1632                 adb_int_pending = 1;
1633                 spin_unlock_irqrestore(&pmu_lock, flags);
1634                 via_pmu_interrupt(0, NULL);
1635                 return IRQ_HANDLED;
1636         }
1637         return IRQ_NONE;
1638 }
1639
1640 void
1641 pmu_enable_irled(int on)
1642 {
1643         struct adb_request req;
1644
1645         if (vias == NULL)
1646                 return ;
1647         if (pmu_kind == PMU_KEYLARGO_BASED)
1648                 return ;
1649
1650         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1651             (on ? PMU_POW_ON : PMU_POW_OFF));
1652         pmu_wait_complete(&req);
1653 }
1654
1655 void
1656 pmu_restart(void)
1657 {
1658         struct adb_request req;
1659
1660         if (via == NULL)
1661                 return;
1662
1663         local_irq_disable();
1664
1665         drop_interrupts = 1;
1666
1667         if (pmu_kind != PMU_KEYLARGO_BASED) {
1668                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1669                                                 PMU_INT_TICK );
1670                 while(!req.complete)
1671                         pmu_poll();
1672         }
1673
1674         pmu_request(&req, NULL, 1, PMU_RESET);
1675         pmu_wait_complete(&req);
1676         for (;;)
1677                 ;
1678 }
1679
1680 void
1681 pmu_shutdown(void)
1682 {
1683         struct adb_request req;
1684
1685         if (via == NULL)
1686                 return;
1687
1688         local_irq_disable();
1689
1690         drop_interrupts = 1;
1691
1692         if (pmu_kind != PMU_KEYLARGO_BASED) {
1693                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1694                                                 PMU_INT_TICK );
1695                 pmu_wait_complete(&req);
1696         } else {
1697                 /* Disable server mode on shutdown or we'll just
1698                  * wake up again
1699                  */
1700                 pmu_set_server_mode(0);
1701         }
1702
1703         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1704                     'M', 'A', 'T', 'T');
1705         pmu_wait_complete(&req);
1706         for (;;)
1707                 ;
1708 }
1709
1710 int
1711 pmu_present(void)
1712 {
1713         return via != 0;
1714 }
1715
1716 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1717 /*
1718  * Put the powerbook to sleep.
1719  */
1720
1721 static u32 save_via[8];
1722
1723 static void
1724 save_via_state(void)
1725 {
1726         save_via[0] = in_8(&via[ANH]);
1727         save_via[1] = in_8(&via[DIRA]);
1728         save_via[2] = in_8(&via[B]);
1729         save_via[3] = in_8(&via[DIRB]);
1730         save_via[4] = in_8(&via[PCR]);
1731         save_via[5] = in_8(&via[ACR]);
1732         save_via[6] = in_8(&via[T1CL]);
1733         save_via[7] = in_8(&via[T1CH]);
1734 }
1735 static void
1736 restore_via_state(void)
1737 {
1738         out_8(&via[ANH], save_via[0]);
1739         out_8(&via[DIRA], save_via[1]);
1740         out_8(&via[B], save_via[2]);
1741         out_8(&via[DIRB], save_via[3]);
1742         out_8(&via[PCR], save_via[4]);
1743         out_8(&via[ACR], save_via[5]);
1744         out_8(&via[T1CL], save_via[6]);
1745         out_8(&via[T1CH], save_via[7]);
1746         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
1747         out_8(&via[IFR], 0x7f);                         /* clear IFR */
1748         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1749 }
1750
1751 #define GRACKLE_PM      (1<<7)
1752 #define GRACKLE_DOZE    (1<<5)
1753 #define GRACKLE_NAP     (1<<4)
1754 #define GRACKLE_SLEEP   (1<<3)
1755
1756 static int powerbook_sleep_grackle(void)
1757 {
1758         unsigned long save_l2cr;
1759         unsigned short pmcr1;
1760         struct adb_request req;
1761         struct pci_dev *grackle;
1762
1763         grackle = pci_get_bus_and_slot(0, 0);
1764         if (!grackle)
1765                 return -ENODEV;
1766
1767         /* Turn off various things. Darwin does some retry tests here... */
1768         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1769         pmu_wait_complete(&req);
1770         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1771                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1772         pmu_wait_complete(&req);
1773
1774         /* For 750, save backside cache setting and disable it */
1775         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1776
1777         if (!__fake_sleep) {
1778                 /* Ask the PMU to put us to sleep */
1779                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1780                 pmu_wait_complete(&req);
1781         }
1782
1783         /* The VIA is supposed not to be restored correctly*/
1784         save_via_state();
1785         /* We shut down some HW */
1786         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1787
1788         pci_read_config_word(grackle, 0x70, &pmcr1);
1789         /* Apparently, MacOS uses NAP mode for Grackle ??? */
1790         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1791         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1792         pci_write_config_word(grackle, 0x70, pmcr1);
1793
1794         /* Call low-level ASM sleep handler */
1795         if (__fake_sleep)
1796                 mdelay(5000);
1797         else
1798                 low_sleep_handler();
1799
1800         /* We're awake again, stop grackle PM */
1801         pci_read_config_word(grackle, 0x70, &pmcr1);
1802         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1803         pci_write_config_word(grackle, 0x70, pmcr1);
1804
1805         pci_dev_put(grackle);
1806
1807         /* Make sure the PMU is idle */
1808         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1809         restore_via_state();
1810
1811         /* Restore L2 cache */
1812         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1813                 _set_L2CR(save_l2cr);
1814
1815         /* Restore userland MMU context */
1816         set_context(current->active_mm->context.id, current->active_mm->pgd);
1817
1818         /* Power things up */
1819         pmu_unlock();
1820         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1821         pmu_wait_complete(&req);
1822         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1823                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1824         pmu_wait_complete(&req);
1825         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1826                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1827         pmu_wait_complete(&req);
1828
1829         return 0;
1830 }
1831
1832 static int
1833 powerbook_sleep_Core99(void)
1834 {
1835         unsigned long save_l2cr;
1836         unsigned long save_l3cr;
1837         struct adb_request req;
1838
1839         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1840                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1841                 return -ENOSYS;
1842         }
1843
1844         if (num_online_cpus() > 1 || cpu_is_offline(0))
1845                 return -EAGAIN;
1846
1847         /* Stop environment and ADB interrupts */
1848         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1849         pmu_wait_complete(&req);
1850
1851         /* Tell PMU what events will wake us up */
1852         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1853                 0xff, 0xff);
1854         pmu_wait_complete(&req);
1855         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1856                 0, PMU_PWR_WAKEUP_KEY |
1857                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1858         pmu_wait_complete(&req);
1859
1860         /* Save the state of the L2 and L3 caches */
1861         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
1862         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1863
1864         if (!__fake_sleep) {
1865                 /* Ask the PMU to put us to sleep */
1866                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1867                 pmu_wait_complete(&req);
1868         }
1869
1870         /* The VIA is supposed not to be restored correctly*/
1871         save_via_state();
1872
1873         /* Shut down various ASICs. There's a chance that we can no longer
1874          * talk to the PMU after this, so I moved it to _after_ sending the
1875          * sleep command to it. Still need to be checked.
1876          */
1877         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1878
1879         /* Call low-level ASM sleep handler */
1880         if (__fake_sleep)
1881                 mdelay(5000);
1882         else
1883                 low_sleep_handler();
1884
1885         /* Restore Apple core ASICs state */
1886         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1887
1888         /* Restore VIA */
1889         restore_via_state();
1890
1891         /* tweak LPJ before cpufreq is there */
1892         loops_per_jiffy *= 2;
1893
1894         /* Restore video */
1895         pmac_call_early_video_resume();
1896
1897         /* Restore L2 cache */
1898         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1899                 _set_L2CR(save_l2cr);
1900         /* Restore L3 cache */
1901         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1902                 _set_L3CR(save_l3cr);
1903
1904         /* Restore userland MMU context */
1905         set_context(current->active_mm->context.id, current->active_mm->pgd);
1906
1907         /* Tell PMU we are ready */
1908         pmu_unlock();
1909         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1910         pmu_wait_complete(&req);
1911         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1912         pmu_wait_complete(&req);
1913
1914         /* Restore LPJ, cpufreq will adjust the cpu frequency */
1915         loops_per_jiffy /= 2;
1916
1917         return 0;
1918 }
1919
1920 #define PB3400_MEM_CTRL         0xf8000000
1921 #define PB3400_MEM_CTRL_SLEEP   0x70
1922
1923 static void __iomem *pb3400_mem_ctrl;
1924
1925 static void powerbook_sleep_init_3400(void)
1926 {
1927         /* map in the memory controller registers */
1928         pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1929         if (pb3400_mem_ctrl == NULL)
1930                 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1931 }
1932
1933 static int powerbook_sleep_3400(void)
1934 {
1935         int i, x;
1936         unsigned int hid0;
1937         unsigned long msr;
1938         struct adb_request sleep_req;
1939         unsigned int __iomem *mem_ctrl_sleep;
1940
1941         if (pb3400_mem_ctrl == NULL)
1942                 return -ENOMEM;
1943         mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1944
1945         /* Set the memory controller to keep the memory refreshed
1946            while we're asleep */
1947         for (i = 0x403f; i >= 0x4000; --i) {
1948                 out_be32(mem_ctrl_sleep, i);
1949                 do {
1950                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1951                 } while (x == 0);
1952                 if (x >= 0x100)
1953                         break;
1954         }
1955
1956         /* Ask the PMU to put us to sleep */
1957         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1958         pmu_wait_complete(&sleep_req);
1959         pmu_unlock();
1960
1961         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1962
1963         asleep = 1;
1964
1965         /* Put the CPU into sleep mode */
1966         hid0 = mfspr(SPRN_HID0);
1967         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
1968         mtspr(SPRN_HID0, hid0);
1969         local_irq_enable();
1970         msr = mfmsr() | MSR_POW;
1971         while (asleep) {
1972                 mb();
1973                 mtmsr(msr);
1974                 isync();
1975         }
1976         local_irq_disable();
1977
1978         /* OK, we're awake again, start restoring things */
1979         out_be32(mem_ctrl_sleep, 0x3f);
1980         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1981
1982         return 0;
1983 }
1984
1985 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
1986
1987 /*
1988  * Support for /dev/pmu device
1989  */
1990 #define RB_SIZE         0x10
1991 struct pmu_private {
1992         struct list_head list;
1993         int     rb_get;
1994         int     rb_put;
1995         struct rb_entry {
1996                 unsigned short len;
1997                 unsigned char data[16];
1998         }       rb_buf[RB_SIZE];
1999         wait_queue_head_t wait;
2000         spinlock_t lock;
2001 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2002         int     backlight_locker;
2003 #endif
2004 };
2005
2006 static LIST_HEAD(all_pmu_pvt);
2007 static DEFINE_SPINLOCK(all_pvt_lock);
2008
2009 static void
2010 pmu_pass_intr(unsigned char *data, int len)
2011 {
2012         struct pmu_private *pp;
2013         struct list_head *list;
2014         int i;
2015         unsigned long flags;
2016
2017         if (len > sizeof(pp->rb_buf[0].data))
2018                 len = sizeof(pp->rb_buf[0].data);
2019         spin_lock_irqsave(&all_pvt_lock, flags);
2020         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2021                 pp = list_entry(list, struct pmu_private, list);
2022                 spin_lock(&pp->lock);
2023                 i = pp->rb_put + 1;
2024                 if (i >= RB_SIZE)
2025                         i = 0;
2026                 if (i != pp->rb_get) {
2027                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2028                         rp->len = len;
2029                         memcpy(rp->data, data, len);
2030                         pp->rb_put = i;
2031                         wake_up_interruptible(&pp->wait);
2032                 }
2033                 spin_unlock(&pp->lock);
2034         }
2035         spin_unlock_irqrestore(&all_pvt_lock, flags);
2036 }
2037
2038 static int
2039 pmu_open(struct inode *inode, struct file *file)
2040 {
2041         struct pmu_private *pp;
2042         unsigned long flags;
2043
2044         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2045         if (pp == 0)
2046                 return -ENOMEM;
2047         pp->rb_get = pp->rb_put = 0;
2048         spin_lock_init(&pp->lock);
2049         init_waitqueue_head(&pp->wait);
2050         spin_lock_irqsave(&all_pvt_lock, flags);
2051 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2052         pp->backlight_locker = 0;
2053 #endif
2054         list_add(&pp->list, &all_pmu_pvt);
2055         spin_unlock_irqrestore(&all_pvt_lock, flags);
2056         file->private_data = pp;
2057         return 0;
2058 }
2059
2060 static ssize_t
2061 pmu_read(struct file *file, char __user *buf,
2062                         size_t count, loff_t *ppos)
2063 {
2064         struct pmu_private *pp = file->private_data;
2065         DECLARE_WAITQUEUE(wait, current);
2066         unsigned long flags;
2067         int ret = 0;
2068
2069         if (count < 1 || pp == 0)
2070                 return -EINVAL;
2071         if (!access_ok(VERIFY_WRITE, buf, count))
2072                 return -EFAULT;
2073
2074         spin_lock_irqsave(&pp->lock, flags);
2075         add_wait_queue(&pp->wait, &wait);
2076         current->state = TASK_INTERRUPTIBLE;
2077
2078         for (;;) {
2079                 ret = -EAGAIN;
2080                 if (pp->rb_get != pp->rb_put) {
2081                         int i = pp->rb_get;
2082                         struct rb_entry *rp = &pp->rb_buf[i];
2083                         ret = rp->len;
2084                         spin_unlock_irqrestore(&pp->lock, flags);
2085                         if (ret > count)
2086                                 ret = count;
2087                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2088                                 ret = -EFAULT;
2089                         if (++i >= RB_SIZE)
2090                                 i = 0;
2091                         spin_lock_irqsave(&pp->lock, flags);
2092                         pp->rb_get = i;
2093                 }
2094                 if (ret >= 0)
2095                         break;
2096                 if (file->f_flags & O_NONBLOCK)
2097                         break;
2098                 ret = -ERESTARTSYS;
2099                 if (signal_pending(current))
2100                         break;
2101                 spin_unlock_irqrestore(&pp->lock, flags);
2102                 schedule();
2103                 spin_lock_irqsave(&pp->lock, flags);
2104         }
2105         current->state = TASK_RUNNING;
2106         remove_wait_queue(&pp->wait, &wait);
2107         spin_unlock_irqrestore(&pp->lock, flags);
2108
2109         return ret;
2110 }
2111
2112 static ssize_t
2113 pmu_write(struct file *file, const char __user *buf,
2114                          size_t count, loff_t *ppos)
2115 {
2116         return 0;
2117 }
2118
2119 static unsigned int
2120 pmu_fpoll(struct file *filp, poll_table *wait)
2121 {
2122         struct pmu_private *pp = filp->private_data;
2123         unsigned int mask = 0;
2124         unsigned long flags;
2125
2126         if (pp == 0)
2127                 return 0;
2128         poll_wait(filp, &pp->wait, wait);
2129         spin_lock_irqsave(&pp->lock, flags);
2130         if (pp->rb_get != pp->rb_put)
2131                 mask |= POLLIN;
2132         spin_unlock_irqrestore(&pp->lock, flags);
2133         return mask;
2134 }
2135
2136 static int
2137 pmu_release(struct inode *inode, struct file *file)
2138 {
2139         struct pmu_private *pp = file->private_data;
2140         unsigned long flags;
2141
2142         if (pp != 0) {
2143                 file->private_data = NULL;
2144                 spin_lock_irqsave(&all_pvt_lock, flags);
2145                 list_del(&pp->list);
2146                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2147
2148 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2149                 if (pp->backlight_locker)
2150                         pmac_backlight_enable();
2151 #endif
2152
2153                 kfree(pp);
2154         }
2155         return 0;
2156 }
2157
2158 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2159 static void pmac_suspend_disable_irqs(void)
2160 {
2161         /* Call platform functions marked "on sleep" */
2162         pmac_pfunc_i2c_suspend();
2163         pmac_pfunc_base_suspend();
2164 }
2165
2166 static int powerbook_sleep(suspend_state_t state)
2167 {
2168         int error = 0;
2169
2170         /* Wait for completion of async requests */
2171         while (!batt_req.complete)
2172                 pmu_poll();
2173
2174         /* Giveup the lazy FPU & vec so we don't have to back them
2175          * up from the low level code
2176          */
2177         enable_kernel_fp();
2178
2179 #ifdef CONFIG_ALTIVEC
2180         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2181                 enable_kernel_altivec();
2182 #endif /* CONFIG_ALTIVEC */
2183
2184         switch (pmu_kind) {
2185         case PMU_OHARE_BASED:
2186                 error = powerbook_sleep_3400();
2187                 break;
2188         case PMU_HEATHROW_BASED:
2189         case PMU_PADDINGTON_BASED:
2190                 error = powerbook_sleep_grackle();
2191                 break;
2192         case PMU_KEYLARGO_BASED:
2193                 error = powerbook_sleep_Core99();
2194                 break;
2195         default:
2196                 return -ENOSYS;
2197         }
2198
2199         if (error)
2200                 return error;
2201
2202         mdelay(100);
2203
2204         return 0;
2205 }
2206
2207 static void pmac_suspend_enable_irqs(void)
2208 {
2209         /* Force a poll of ADB interrupts */
2210         adb_int_pending = 1;
2211         via_pmu_interrupt(0, NULL);
2212
2213         mdelay(10);
2214
2215         /* Call platform functions marked "on wake" */
2216         pmac_pfunc_base_resume();
2217         pmac_pfunc_i2c_resume();
2218 }
2219
2220 static int pmu_sleep_valid(suspend_state_t state)
2221 {
2222         return state == PM_SUSPEND_MEM
2223                 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2224 }
2225
2226 static struct platform_suspend_ops pmu_pm_ops = {
2227         .enter = powerbook_sleep,
2228         .valid = pmu_sleep_valid,
2229 };
2230
2231 static int register_pmu_pm_ops(void)
2232 {
2233         if (pmu_kind == PMU_OHARE_BASED)
2234                 powerbook_sleep_init_3400();
2235         ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2236         ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2237         suspend_set_ops(&pmu_pm_ops);
2238
2239         return 0;
2240 }
2241
2242 device_initcall(register_pmu_pm_ops);
2243 #endif
2244
2245 static int
2246 pmu_ioctl(struct inode * inode, struct file *filp,
2247                      u_int cmd, u_long arg)
2248 {
2249         __u32 __user *argp = (__u32 __user *)arg;
2250         int error = -EINVAL;
2251
2252         switch (cmd) {
2253         case PMU_IOC_SLEEP:
2254                 if (!capable(CAP_SYS_ADMIN))
2255                         return -EACCES;
2256                 return pm_suspend(PM_SUSPEND_MEM);
2257         case PMU_IOC_CAN_SLEEP:
2258                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2259                         return put_user(0, argp);
2260                 else
2261                         return put_user(1, argp);
2262
2263 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2264         /* Compatibility ioctl's for backlight */
2265         case PMU_IOC_GET_BACKLIGHT:
2266         {
2267                 int brightness;
2268
2269                 brightness = pmac_backlight_get_legacy_brightness();
2270                 if (brightness < 0)
2271                         return brightness;
2272                 else
2273                         return put_user(brightness, argp);
2274
2275         }
2276         case PMU_IOC_SET_BACKLIGHT:
2277         {
2278                 int brightness;
2279
2280                 error = get_user(brightness, argp);
2281                 if (error)
2282                         return error;
2283
2284                 return pmac_backlight_set_legacy_brightness(brightness);
2285         }
2286 #ifdef CONFIG_INPUT_ADBHID
2287         case PMU_IOC_GRAB_BACKLIGHT: {
2288                 struct pmu_private *pp = filp->private_data;
2289
2290                 if (pp->backlight_locker)
2291                         return 0;
2292
2293                 pp->backlight_locker = 1;
2294                 pmac_backlight_disable();
2295
2296                 return 0;
2297         }
2298 #endif /* CONFIG_INPUT_ADBHID */
2299 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2300
2301         case PMU_IOC_GET_MODEL:
2302                 return put_user(pmu_kind, argp);
2303         case PMU_IOC_HAS_ADB:
2304                 return put_user(pmu_has_adb, argp);
2305         }
2306         return error;
2307 }
2308
2309 static const struct file_operations pmu_device_fops = {
2310         .read           = pmu_read,
2311         .write          = pmu_write,
2312         .poll           = pmu_fpoll,
2313         .ioctl          = pmu_ioctl,
2314         .open           = pmu_open,
2315         .release        = pmu_release,
2316 };
2317
2318 static struct miscdevice pmu_device = {
2319         PMU_MINOR, "pmu", &pmu_device_fops
2320 };
2321
2322 static int pmu_device_init(void)
2323 {
2324         if (!via)
2325                 return 0;
2326         if (misc_register(&pmu_device) < 0)
2327                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2328         return 0;
2329 }
2330 device_initcall(pmu_device_init);
2331
2332
2333 #ifdef DEBUG_SLEEP
2334 static inline void
2335 polled_handshake(volatile unsigned char __iomem *via)
2336 {
2337         via[B] &= ~TREQ; eieio();
2338         while ((via[B] & TACK) != 0)
2339                 ;
2340         via[B] |= TREQ; eieio();
2341         while ((via[B] & TACK) == 0)
2342                 ;
2343 }
2344
2345 static inline void
2346 polled_send_byte(volatile unsigned char __iomem *via, int x)
2347 {
2348         via[ACR] |= SR_OUT | SR_EXT; eieio();
2349         via[SR] = x; eieio();
2350         polled_handshake(via);
2351 }
2352
2353 static inline int
2354 polled_recv_byte(volatile unsigned char __iomem *via)
2355 {
2356         int x;
2357
2358         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2359         x = via[SR]; eieio();
2360         polled_handshake(via);
2361         x = via[SR]; eieio();
2362         return x;
2363 }
2364
2365 int
2366 pmu_polled_request(struct adb_request *req)
2367 {
2368         unsigned long flags;
2369         int i, l, c;
2370         volatile unsigned char __iomem *v = via;
2371
2372         req->complete = 1;
2373         c = req->data[0];
2374         l = pmu_data_len[c][0];
2375         if (l >= 0 && req->nbytes != l + 1)
2376                 return -EINVAL;
2377
2378         local_irq_save(flags);
2379         while (pmu_state != idle)
2380                 pmu_poll();
2381
2382         while ((via[B] & TACK) == 0)
2383                 ;
2384         polled_send_byte(v, c);
2385         if (l < 0) {
2386                 l = req->nbytes - 1;
2387                 polled_send_byte(v, l);
2388         }
2389         for (i = 1; i <= l; ++i)
2390                 polled_send_byte(v, req->data[i]);
2391
2392         l = pmu_data_len[c][1];
2393         if (l < 0)
2394                 l = polled_recv_byte(v);
2395         for (i = 0; i < l; ++i)
2396                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2397
2398         if (req->done)
2399                 (*req->done)(req);
2400
2401         local_irq_restore(flags);
2402         return 0;
2403 }
2404
2405 /* N.B. This doesn't work on the 3400 */
2406 void pmu_blink(int n)
2407 {
2408         struct adb_request req;
2409
2410         memset(&req, 0, sizeof(req));
2411
2412         for (; n > 0; --n) {
2413                 req.nbytes = 4;
2414                 req.done = NULL;
2415                 req.data[0] = 0xee;
2416                 req.data[1] = 4;
2417                 req.data[2] = 0;
2418                 req.data[3] = 1;
2419                 req.reply[0] = ADB_RET_OK;
2420                 req.reply_len = 1;
2421                 req.reply_expected = 0;
2422                 pmu_polled_request(&req);
2423                 mdelay(50);
2424                 req.nbytes = 4;
2425                 req.done = NULL;
2426                 req.data[0] = 0xee;
2427                 req.data[1] = 4;
2428                 req.data[2] = 0;
2429                 req.data[3] = 0;
2430                 req.reply[0] = ADB_RET_OK;
2431                 req.reply_len = 1;
2432                 req.reply_expected = 0;
2433                 pmu_polled_request(&req);
2434                 mdelay(50);
2435         }
2436         mdelay(50);
2437 }
2438 #endif /* DEBUG_SLEEP */
2439
2440 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2441 int pmu_sys_suspended;
2442
2443 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2444 {
2445         if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2446                 return 0;
2447
2448         /* Suspend PMU event interrupts */\
2449         pmu_suspend();
2450         pmu_sys_suspended = 1;
2451
2452 #ifdef CONFIG_PMAC_BACKLIGHT
2453         /* Tell backlight code not to muck around with the chip anymore */
2454         pmu_backlight_set_sleep(1);
2455 #endif
2456
2457         return 0;
2458 }
2459
2460 static int pmu_sys_resume(struct sys_device *sysdev)
2461 {
2462         struct adb_request req;
2463
2464         if (!pmu_sys_suspended)
2465                 return 0;
2466
2467         /* Tell PMU we are ready */
2468         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2469         pmu_wait_complete(&req);
2470
2471 #ifdef CONFIG_PMAC_BACKLIGHT
2472         /* Tell backlight code it can use the chip again */
2473         pmu_backlight_set_sleep(0);
2474 #endif
2475         /* Resume PMU event interrupts */
2476         pmu_resume();
2477         pmu_sys_suspended = 0;
2478
2479         return 0;
2480 }
2481
2482 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2483
2484 static struct sysdev_class pmu_sysclass = {
2485         .name = "pmu",
2486 };
2487
2488 static struct sys_device device_pmu = {
2489         .cls            = &pmu_sysclass,
2490 };
2491
2492 static struct sysdev_driver driver_pmu = {
2493 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2494         .suspend        = &pmu_sys_suspend,
2495         .resume         = &pmu_sys_resume,
2496 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2497 };
2498
2499 static int __init init_pmu_sysfs(void)
2500 {
2501         int rc;
2502
2503         rc = sysdev_class_register(&pmu_sysclass);
2504         if (rc) {
2505                 printk(KERN_ERR "Failed registering PMU sys class\n");
2506                 return -ENODEV;
2507         }
2508         rc = sysdev_register(&device_pmu);
2509         if (rc) {
2510                 printk(KERN_ERR "Failed registering PMU sys device\n");
2511                 return -ENODEV;
2512         }
2513         rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2514         if (rc) {
2515                 printk(KERN_ERR "Failed registering PMU sys driver\n");
2516                 return -ENODEV;
2517         }
2518         return 0;
2519 }
2520
2521 subsys_initcall(init_pmu_sysfs);
2522
2523 EXPORT_SYMBOL(pmu_request);
2524 EXPORT_SYMBOL(pmu_queue_request);
2525 EXPORT_SYMBOL(pmu_poll);
2526 EXPORT_SYMBOL(pmu_poll_adb);
2527 EXPORT_SYMBOL(pmu_wait_complete);
2528 EXPORT_SYMBOL(pmu_suspend);
2529 EXPORT_SYMBOL(pmu_resume);
2530 EXPORT_SYMBOL(pmu_unlock);
2531 #if defined(CONFIG_PPC32)
2532 EXPORT_SYMBOL(pmu_enable_irled);
2533 EXPORT_SYMBOL(pmu_battery_count);
2534 EXPORT_SYMBOL(pmu_batteries);
2535 EXPORT_SYMBOL(pmu_power_flags);
2536 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2537