err.no Git - linux-2.6/blob - drivers/macintosh/via-pmu.c

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