drivers/macintosh/via-pmu.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Device driver for the PMU in Apple PowerBooks and PowerMacs.
   4  *
   5  * The VIA (versatile interface adapter) interfaces to the PMU,
   6  * a 6805 microprocessor core whose primary function is to control
   7  * battery charging and system power on the PowerBook 3400 and 2400.
   8  * The PMU also controls the ADB (Apple Desktop Bus) which connects
   9  * to the keyboard and mouse, as well as the non-volatile RAM
  10  * and the RTC (real time clock) chip.
  11  *
  12  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
  13  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
  14  * Copyright (C) 2006-2007 Johannes Berg
  15  *
  16  * THIS DRIVER IS BECOMING A TOTAL MESS !
  17  *  - Cleanup atomically disabling reply to PMU events after
  18  *    a sleep or a freq. switch
  19  *
  20  */
  21 #include <linux/stdarg.h>
  22 #include <linux/mutex.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/signal.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/seq_file.h>
  41 #include <linux/init.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/device.h>
  44 #include <linux/syscore_ops.h>
  45 #include <linux/freezer.h>
  46 #include <linux/syscalls.h>
  47 #include <linux/suspend.h>
  48 #include <linux/cpu.h>
  49 #include <linux/compat.h>
  50 #include <linux/of_address.h>
  51 #include <linux/of_irq.h>
  52 #include <linux/uaccess.h>
  53 #include <linux/pgtable.h>
  54 #include <asm/machdep.h>
  55 #include <asm/io.h>
  56 #include <asm/sections.h>
  57 #include <asm/irq.h>
  58 #ifdef CONFIG_PPC_PMAC
  59 #include <asm/pmac_feature.h>
  60 #include <asm/pmac_pfunc.h>
  61 #include <asm/pmac_low_i2c.h>
  62 #include <asm/mmu_context.h>
  63 #include <asm/cputable.h>
  64 #include <asm/time.h>
  65 #include <asm/backlight.h>
  66 #else
  67 #include <asm/macintosh.h>
  68 #include <asm/macints.h>
  69 #include <asm/mac_via.h>
  70 #endif
  71
  72 #include "via-pmu-event.h"
  73
  74 /* Some compile options */
  75 #undef DEBUG_SLEEP
  76
  77 /* How many iterations between battery polls */
  78 #define BATTERY_POLLING_COUNT   2
  79
  80 static DEFINE_MUTEX(pmu_info_proc_mutex);
  81
  82 /* VIA registers - spaced 0x200 bytes apart */
  83 #define RS              0x200           /* skip between registers */
  84 #define B               0               /* B-side data */
  85 #define A               RS              /* A-side data */
  86 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  87 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  88 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  89 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  90 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  91 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  92 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  93 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  94 #define SR              (10*RS)         /* Shift register */
  95 #define ACR             (11*RS)         /* Auxiliary control register */
  96 #define PCR             (12*RS)         /* Peripheral control register */
  97 #define IFR             (13*RS)         /* Interrupt flag register */
  98 #define IER             (14*RS)         /* Interrupt enable register */
  99 #define ANH             (15*RS)         /* A-side data, no handshake */
 100
 101 /* Bits in B data register: both active low */
 102 #ifdef CONFIG_PPC_PMAC
 103 #define TACK            0x08            /* Transfer acknowledge (input) */
 104 #define TREQ            0x10            /* Transfer request (output) */
 105 #else
 106 #define TACK            0x02
 107 #define TREQ            0x04
 108 #endif
 109
 110 /* Bits in ACR */
 111 #define SR_CTRL         0x1c            /* Shift register control bits */
 112 #define SR_EXT          0x0c            /* Shift on external clock */
 113 #define SR_OUT          0x10            /* Shift out if 1 */
 114
 115 /* Bits in IFR and IER */
 116 #define IER_SET         0x80            /* set bits in IER */
 117 #define IER_CLR         0               /* clear bits in IER */
 118 #define SR_INT          0x04            /* Shift register full/empty */
 119 #define CB2_INT         0x08
 120 #define CB1_INT         0x10            /* transition on CB1 input */
 121
 122 static volatile enum pmu_state {
 123         uninitialized = 0,
 124         idle,
 125         sending,
 126         intack,
 127         reading,
 128         reading_intr,
 129         locked,
 130 } pmu_state;
 131
 132 static volatile enum int_data_state {
 133         int_data_empty,
 134         int_data_fill,
 135         int_data_ready,
 136         int_data_flush
 137 } int_data_state[2] = { int_data_empty, int_data_empty };
 138
 139 static struct adb_request *current_req;
 140 static struct adb_request *last_req;
 141 static struct adb_request *req_awaiting_reply;
 142 static unsigned char interrupt_data[2][32];
 143 static int interrupt_data_len[2];
 144 static int int_data_last;
 145 static unsigned char *reply_ptr;
 146 static int data_index;
 147 static int data_len;
 148 static volatile int adb_int_pending;
 149 static volatile int disable_poll;
 150 static int pmu_kind = PMU_UNKNOWN;
 151 static int pmu_fully_inited;
 152 static int pmu_has_adb;
 153 #ifdef CONFIG_PPC_PMAC
 154 static volatile unsigned char __iomem *via1;
 155 static volatile unsigned char __iomem *via2;
 156 static struct device_node *vias;
 157 static struct device_node *gpio_node;
 158 #endif
 159 static unsigned char __iomem *gpio_reg;
 160 static int gpio_irq = 0;
 161 static int gpio_irq_enabled = -1;
 162 static volatile int pmu_suspended;
 163 static DEFINE_SPINLOCK(pmu_lock);
 164 static u8 pmu_intr_mask;
 165 static int pmu_version;
 166 static int drop_interrupts;
 167 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 168 static int option_lid_wakeup = 1;
 169 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
 170 static unsigned long async_req_locks;
 171
 172 #define NUM_IRQ_STATS 13
 173 static unsigned int pmu_irq_stats[NUM_IRQ_STATS];
 174
 175 static struct proc_dir_entry *proc_pmu_root;
 176 static struct proc_dir_entry *proc_pmu_info;
 177 static struct proc_dir_entry *proc_pmu_irqstats;
 178 static struct proc_dir_entry *proc_pmu_options;
 179 static int option_server_mode;
 180
 181 int pmu_battery_count;
 182 static int pmu_cur_battery;
 183 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 184 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 185 static int query_batt_timer = BATTERY_POLLING_COUNT;
 186 static struct adb_request batt_req;
 187 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 188
 189 int asleep;
 190
 191 #ifdef CONFIG_ADB
 192 static int adb_dev_map;
 193 static int pmu_adb_flags;
 194
 195 static int pmu_probe(void);
 196 static int pmu_init(void);
 197 static int pmu_send_request(struct adb_request *req, int sync);
 198 static int pmu_adb_autopoll(int devs);
 199 static int pmu_adb_reset_bus(void);
 200 #endif /* CONFIG_ADB */
 201
 202 static int init_pmu(void);
 203 static void pmu_start(void);
 204 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
 205 static irqreturn_t gpio1_interrupt(int irq, void *arg);
 206 static int pmu_info_proc_show(struct seq_file *m, void *v);
 207 static int pmu_irqstats_proc_show(struct seq_file *m, void *v);
 208 static int pmu_battery_proc_show(struct seq_file *m, void *v);
 209 static void pmu_pass_intr(unsigned char *data, int len);
 210 static const struct proc_ops pmu_options_proc_ops;
 211
 212 #ifdef CONFIG_ADB
 213 const struct adb_driver via_pmu_driver = {
 214         .name         = "PMU",
 215         .probe        = pmu_probe,
 216         .init         = pmu_init,
 217         .send_request = pmu_send_request,
 218         .autopoll     = pmu_adb_autopoll,
 219         .poll         = pmu_poll_adb,
 220         .reset_bus    = pmu_adb_reset_bus,
 221 };
 222 #endif /* CONFIG_ADB */
 223
 224 extern void low_sleep_handler(void);
 225 extern void enable_kernel_altivec(void);
 226 extern void enable_kernel_fp(void);
 227
 228 #ifdef DEBUG_SLEEP
 229 int pmu_polled_request(struct adb_request *req);
 230 void pmu_blink(int n);
 231 #endif
 232
 233 /*
 234  * This table indicates for each PMU opcode:
 235  * - the number of data bytes to be sent with the command, or -1
 236  *   if a length byte should be sent,
 237  * - the number of response bytes which the PMU will return, or
 238  *   -1 if it will send a length byte.
 239  */
 240 static const s8 pmu_data_len[256][2] = {
 241 /*         0       1       2       3       4       5       6       7  */
 242 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 243 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 244 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 245 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 246 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 247 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 248 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 249 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 250 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 251 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 252 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 253 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 254 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 255 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 256 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 257 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 258 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 259 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 260 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 261 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 262 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 263 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 264 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 265 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 266 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 267 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 268 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 269 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 270 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 271 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 272 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 273 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 274 };
 275
 276 static char *pbook_type[] = {
 277         "Unknown PowerBook",
 278         "PowerBook 2400/3400/3500(G3)",
 279         "PowerBook G3 Series",
 280         "1999 PowerBook G3",
 281         "Core99"
 282 };
 283
 284 int __init find_via_pmu(void)
 285 {
 286 #ifdef CONFIG_PPC_PMAC
 287         u64 taddr;
 288         const u32 *reg;
 289
 290         if (pmu_state != uninitialized)
 291                 return 1;
 292         vias = of_find_node_by_name(NULL, "via-pmu");
 293         if (vias == NULL)
 294                 return 0;
 295
 296         reg = of_get_property(vias, "reg", NULL);
 297         if (reg == NULL) {
 298                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 299                 goto fail;
 300         }
 301         taddr = of_translate_address(vias, reg);
 302         if (taddr == OF_BAD_ADDR) {
 303                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 304                 goto fail;
 305         }
 306
 307         pmu_has_adb = 1;
 308
 309         pmu_intr_mask = PMU_INT_PCEJECT |
 310                         PMU_INT_SNDBRT |
 311                         PMU_INT_ADB |
 312                         PMU_INT_TICK;
 313
 314         if (of_node_name_eq(vias->parent, "ohare") ||
 315             of_device_is_compatible(vias->parent, "ohare"))
 316                 pmu_kind = PMU_OHARE_BASED;
 317         else if (of_device_is_compatible(vias->parent, "paddington"))
 318                 pmu_kind = PMU_PADDINGTON_BASED;
 319         else if (of_device_is_compatible(vias->parent, "heathrow"))
 320                 pmu_kind = PMU_HEATHROW_BASED;
 321         else if (of_device_is_compatible(vias->parent, "Keylargo")
 322                  || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
 323                 struct device_node *gpiop;
 324                 struct device_node *adbp;
 325                 u64 gaddr = OF_BAD_ADDR;
 326
 327                 pmu_kind = PMU_KEYLARGO_BASED;
 328                 adbp = of_find_node_by_type(NULL, "adb");
 329                 pmu_has_adb = (adbp != NULL);
 330                 of_node_put(adbp);
 331                 pmu_intr_mask = PMU_INT_PCEJECT |
 332                                 PMU_INT_SNDBRT |
 333                                 PMU_INT_ADB |
 334                                 PMU_INT_TICK |
 335                                 PMU_INT_ENVIRONMENT;
 336
 337                 gpiop = of_find_node_by_name(NULL, "gpio");
 338                 if (gpiop) {
 339                         reg = of_get_property(gpiop, "reg", NULL);
 340                         if (reg)
 341                                 gaddr = of_translate_address(gpiop, reg);
 342                         if (gaddr != OF_BAD_ADDR)
 343                                 gpio_reg = ioremap(gaddr, 0x10);
 344                         of_node_put(gpiop);
 345                 }
 346                 if (gpio_reg == NULL) {
 347                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 348                         goto fail;
 349                 }
 350         } else
 351                 pmu_kind = PMU_UNKNOWN;
 352
 353         via1 = via2 = ioremap(taddr, 0x2000);
 354         if (via1 == NULL) {
 355                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 356                 goto fail_via_remap;
 357         }
 358
 359         out_8(&via1[IER], IER_CLR | 0x7f);      /* disable all intrs */
 360         out_8(&via1[IFR], 0x7f);                        /* clear IFR */
 361
 362         pmu_state = idle;
 363
 364         if (!init_pmu())
 365                 goto fail_init;
 366
 367         sys_ctrler = SYS_CTRLER_PMU;
 368
 369         return 1;
 370
 371  fail_init:
 372         iounmap(via1);
 373         via1 = via2 = NULL;
 374  fail_via_remap:
 375         iounmap(gpio_reg);
 376         gpio_reg = NULL;
 377  fail:
 378         of_node_put(vias);
 379         vias = NULL;
 380         pmu_state = uninitialized;
 381         return 0;
 382 #else
 383         if (macintosh_config->adb_type != MAC_ADB_PB2)
 384                 return 0;
 385
 386         pmu_kind = PMU_UNKNOWN;
 387
 388         pmu_has_adb = 1;
 389
 390         pmu_intr_mask = PMU_INT_PCEJECT |
 391                         PMU_INT_SNDBRT |
 392                         PMU_INT_ADB |
 393                         PMU_INT_TICK;
 394
 395         pmu_state = idle;
 396
 397         if (!init_pmu()) {
 398                 pmu_state = uninitialized;
 399                 return 0;
 400         }
 401
 402         return 1;
 403 #endif /* !CONFIG_PPC_PMAC */
 404 }
 405
 406 #ifdef CONFIG_ADB
 407 static int pmu_probe(void)
 408 {
 409         return pmu_state == uninitialized ? -ENODEV : 0;
 410 }
 411
 412 static int pmu_init(void)
 413 {
 414         return pmu_state == uninitialized ? -ENODEV : 0;
 415 }
 416 #endif /* CONFIG_ADB */
 417
 418 /*
 419  * We can't wait until pmu_init gets called, that happens too late.
 420  * It happens after IDE and SCSI initialization, which can take a few
 421  * seconds, and by that time the PMU could have given up on us and
 422  * turned us off.
 423  * Thus this is called with arch_initcall rather than device_initcall.
 424  */
 425 static int __init via_pmu_start(void)
 426 {
 427         unsigned int __maybe_unused irq;
 428
 429         if (pmu_state == uninitialized)
 430                 return -ENODEV;
 431
 432         batt_req.complete = 1;
 433
 434 #ifdef CONFIG_PPC_PMAC
 435         irq = irq_of_parse_and_map(vias, 0);
 436         if (!irq) {
 437                 printk(KERN_ERR "via-pmu: can't map interrupt\n");
 438                 return -ENODEV;
 439         }
 440         /* We set IRQF_NO_SUSPEND because we don't want the interrupt
 441          * to be disabled between the 2 passes of driver suspend, we
 442          * control our own disabling for that one
 443          */
 444         if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
 445                         "VIA-PMU", (void *)0)) {
 446                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 447                 return -ENODEV;
 448         }
 449
 450         if (pmu_kind == PMU_KEYLARGO_BASED) {
 451                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 452                 if (gpio_node == NULL)
 453                         gpio_node = of_find_node_by_name(NULL,
 454                                                          "pmu-interrupt");
 455                 if (gpio_node)
 456                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 457
 458                 if (gpio_irq) {
 459                         if (request_irq(gpio_irq, gpio1_interrupt,
 460                                         IRQF_NO_SUSPEND, "GPIO1 ADB",
 461                                         (void *)0))
 462                                 printk(KERN_ERR "pmu: can't get irq %d"
 463                                        " (GPIO1)\n", gpio_irq);
 464                         else
 465                                 gpio_irq_enabled = 1;
 466                 }
 467         }
 468
 469         /* Enable interrupts */
 470         out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
 471 #else
 472         if (request_irq(IRQ_MAC_ADB_SR, via_pmu_interrupt, IRQF_NO_SUSPEND,
 473                         "VIA-PMU-SR", NULL)) {
 474                 pr_err("%s: couldn't get SR irq\n", __func__);
 475                 return -ENODEV;
 476         }
 477         if (request_irq(IRQ_MAC_ADB_CL, via_pmu_interrupt, IRQF_NO_SUSPEND,
 478                         "VIA-PMU-CL", NULL)) {
 479                 pr_err("%s: couldn't get CL irq\n", __func__);
 480                 free_irq(IRQ_MAC_ADB_SR, NULL);
 481                 return -ENODEV;
 482         }
 483 #endif /* !CONFIG_PPC_PMAC */
 484
 485         pmu_fully_inited = 1;
 486
 487         /* Make sure PMU settle down before continuing. This is _very_ important
 488          * since the IDE probe may shut interrupts down for quite a bit of time. If
 489          * a PMU communication is pending while this happens, the PMU may timeout
 490          * Not that on Core99 machines, the PMU keeps sending us environement
 491          * messages, we should find a way to either fix IDE or make it call
 492          * pmu_suspend() before masking interrupts. This can also happens while
 493          * scolling with some fbdevs.
 494          */
 495         do {
 496                 pmu_poll();
 497         } while (pmu_state != idle);
 498
 499         return 0;
 500 }
 501
 502 arch_initcall(via_pmu_start);
 503
 504 /*
 505  * This has to be done after pci_init, which is a subsys_initcall.
 506  */
 507 static int __init via_pmu_dev_init(void)
 508 {
 509         if (pmu_state == uninitialized)
 510                 return -ENODEV;
 511
 512 #ifdef CONFIG_PMAC_BACKLIGHT
 513         /* Initialize backlight */
 514         pmu_backlight_init();
 515 #endif
 516
 517 #ifdef CONFIG_PPC32
 518         if (of_machine_is_compatible("AAPL,3400/2400") ||
 519                 of_machine_is_compatible("AAPL,3500")) {
 520                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 521                         NULL, PMAC_MB_INFO_MODEL, 0);
 522                 pmu_battery_count = 1;
 523                 if (mb == PMAC_TYPE_COMET)
 524                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 525                 else
 526                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 527         } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
 528                 of_machine_is_compatible("PowerBook1,1")) {
 529                 pmu_battery_count = 2;
 530                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 531                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 532         } else {
 533                 struct device_node* prim =
 534                         of_find_node_by_name(NULL, "power-mgt");
 535                 const u32 *prim_info = NULL;
 536                 if (prim)
 537                         prim_info = of_get_property(prim, "prim-info", NULL);
 538                 if (prim_info) {
 539                         /* Other stuffs here yet unknown */
 540                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 541                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 542                         if (pmu_battery_count > 1)
 543                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 544                 }
 545                 of_node_put(prim);
 546         }
 547 #endif /* CONFIG_PPC32 */
 548
 549         /* Create /proc/pmu */
 550         proc_pmu_root = proc_mkdir("pmu", NULL);
 551         if (proc_pmu_root) {
 552                 long i;
 553
 554                 for (i=0; i<pmu_battery_count; i++) {
 555                         char title[16];
 556                         sprintf(title, "battery_%ld", i);
 557                         proc_pmu_batt[i] = proc_create_single_data(title, 0,
 558                                         proc_pmu_root, pmu_battery_proc_show,
 559                                         (void *)i);
 560                 }
 561
 562                 proc_pmu_info = proc_create_single("info", 0, proc_pmu_root,
 563                                 pmu_info_proc_show);
 564                 proc_pmu_irqstats = proc_create_single("interrupts", 0,
 565                                 proc_pmu_root, pmu_irqstats_proc_show);
 566                 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
 567                                                 &pmu_options_proc_ops);
 568         }
 569         return 0;
 570 }
 571
 572 device_initcall(via_pmu_dev_init);
 573
 574 static int
 575 init_pmu(void)
 576 {
 577         int timeout;
 578         struct adb_request req;
 579
 580         /* Negate TREQ. Set TACK to input and TREQ to output. */
 581         out_8(&via2[B], in_8(&via2[B]) | TREQ);
 582         out_8(&via2[DIRB], (in_8(&via2[DIRB]) | TREQ) & ~TACK);
 583
 584         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 585         timeout =  100000;
 586         while (!req.complete) {
 587                 if (--timeout < 0) {
 588                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 589                         return 0;
 590                 }
 591                 udelay(10);
 592                 pmu_poll();
 593         }
 594
 595         /* ack all pending interrupts */
 596         timeout = 100000;
 597         interrupt_data[0][0] = 1;
 598         while (interrupt_data[0][0] || pmu_state != idle) {
 599                 if (--timeout < 0) {
 600                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 601                         return 0;
 602                 }
 603                 if (pmu_state == idle)
 604                         adb_int_pending = 1;
 605                 via_pmu_interrupt(0, NULL);
 606                 udelay(10);
 607         }
 608
 609         /* Tell PMU we are ready.  */
 610         if (pmu_kind == PMU_KEYLARGO_BASED) {
 611                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 612                 while (!req.complete)
 613                         pmu_poll();
 614         }
 615
 616         /* Read PMU version */
 617         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 618         pmu_wait_complete(&req);
 619         if (req.reply_len > 0)
 620                 pmu_version = req.reply[0];
 621
 622         /* Read server mode setting */
 623         if (pmu_kind == PMU_KEYLARGO_BASED) {
 624                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 625                             PMU_PWR_GET_POWERUP_EVENTS);
 626                 pmu_wait_complete(&req);
 627                 if (req.reply_len == 2) {
 628                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 629                                 option_server_mode = 1;
 630                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 631                                option_server_mode ? "enabled" : "disabled");
 632                 }
 633         }
 634
 635         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 636                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 637
 638         return 1;
 639 }
 640
 641 int
 642 pmu_get_model(void)
 643 {
 644         return pmu_kind;
 645 }
 646
 647 static void pmu_set_server_mode(int server_mode)
 648 {
 649         struct adb_request req;
 650
 651         if (pmu_kind != PMU_KEYLARGO_BASED)
 652                 return;
 653
 654         option_server_mode = server_mode;
 655         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 656         pmu_wait_complete(&req);
 657         if (req.reply_len < 2)
 658                 return;
 659         if (server_mode)
 660                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 661                             PMU_PWR_SET_POWERUP_EVENTS,
 662                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 663         else
 664                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 665                             PMU_PWR_CLR_POWERUP_EVENTS,
 666                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 667         pmu_wait_complete(&req);
 668 }
 669
 670 /* This new version of the code for 2400/3400/3500 powerbooks
 671  * is inspired from the implementation in gkrellm-pmu
 672  */
 673 static void
 674 done_battery_state_ohare(struct adb_request* req)
 675 {
 676 #ifdef CONFIG_PPC_PMAC
 677         /* format:
 678          *  [0]    :  flags
 679          *    0x01 :  AC indicator
 680          *    0x02 :  charging
 681          *    0x04 :  battery exist
 682          *    0x08 :
 683          *    0x10 :
 684          *    0x20 :  full charged
 685          *    0x40 :  pcharge reset
 686          *    0x80 :  battery exist
 687          *
 688          *  [1][2] :  battery voltage
 689          *  [3]    :  CPU temperature
 690          *  [4]    :  battery temperature
 691          *  [5]    :  current
 692          *  [6][7] :  pcharge
 693          *              --tkoba
 694          */
 695         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 696         long pcharge, charge, vb, vmax, lmax;
 697         long vmax_charging, vmax_charged;
 698         long amperage, voltage, time, max;
 699         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 700                         NULL, PMAC_MB_INFO_MODEL, 0);
 701
 702         if (req->reply[0] & 0x01)
 703                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 704         else
 705                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 706
 707         if (mb == PMAC_TYPE_COMET) {
 708                 vmax_charged = 189;
 709                 vmax_charging = 213;
 710                 lmax = 6500;
 711         } else {
 712                 vmax_charged = 330;
 713                 vmax_charging = 330;
 714                 lmax = 6500;
 715         }
 716         vmax = vmax_charged;
 717
 718         /* If battery installed */
 719         if (req->reply[0] & 0x04) {
 720                 bat_flags |= PMU_BATT_PRESENT;
 721                 if (req->reply[0] & 0x02)
 722                         bat_flags |= PMU_BATT_CHARGING;
 723                 vb = (req->reply[1] << 8) | req->reply[2];
 724                 voltage = (vb * 265 + 72665) / 10;
 725                 amperage = req->reply[5];
 726                 if ((req->reply[0] & 0x01) == 0) {
 727                         if (amperage > 200)
 728                                 vb += ((amperage - 200) * 15)/100;
 729                 } else if (req->reply[0] & 0x02) {
 730                         vb = (vb * 97) / 100;
 731                         vmax = vmax_charging;
 732                 }
 733                 charge = (100 * vb) / vmax;
 734                 if (req->reply[0] & 0x40) {
 735                         pcharge = (req->reply[6] << 8) + req->reply[7];
 736                         if (pcharge > lmax)
 737                                 pcharge = lmax;
 738                         pcharge *= 100;
 739                         pcharge = 100 - pcharge / lmax;
 740                         if (pcharge < charge)
 741                                 charge = pcharge;
 742                 }
 743                 if (amperage > 0)
 744                         time = (charge * 16440) / amperage;
 745                 else
 746                         time = 0;
 747                 max = 100;
 748                 amperage = -amperage;
 749         } else
 750                 charge = max = amperage = voltage = time = 0;
 751
 752         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 753         pmu_batteries[pmu_cur_battery].charge = charge;
 754         pmu_batteries[pmu_cur_battery].max_charge = max;
 755         pmu_batteries[pmu_cur_battery].amperage = amperage;
 756         pmu_batteries[pmu_cur_battery].voltage = voltage;
 757         pmu_batteries[pmu_cur_battery].time_remaining = time;
 758 #endif /* CONFIG_PPC_PMAC */
 759
 760         clear_bit(0, &async_req_locks);
 761 }
 762
 763 static void
 764 done_battery_state_smart(struct adb_request* req)
 765 {
 766         /* format:
 767          *  [0] : format of this structure (known: 3,4,5)
 768          *  [1] : flags
 769          *
 770          *  format 3 & 4:
 771          *
 772          *  [2] : charge
 773          *  [3] : max charge
 774          *  [4] : current
 775          *  [5] : voltage
 776          *
 777          *  format 5:
 778          *
 779          *  [2][3] : charge
 780          *  [4][5] : max charge
 781          *  [6][7] : current
 782          *  [8][9] : voltage
 783          */
 784
 785         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 786         int amperage;
 787         unsigned int capa, max, voltage;
 788
 789         if (req->reply[1] & 0x01)
 790                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 791         else
 792                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 793
 794
 795         capa = max = amperage = voltage = 0;
 796
 797         if (req->reply[1] & 0x04) {
 798                 bat_flags |= PMU_BATT_PRESENT;
 799                 switch(req->reply[0]) {
 800                         case 3:
 801                         case 4: capa = req->reply[2];
 802                                 max = req->reply[3];
 803                                 amperage = *((signed char *)&req->reply[4]);
 804                                 voltage = req->reply[5];
 805                                 break;
 806                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 807                                 max = (req->reply[4] << 8) | req->reply[5];
 808                                 amperage = *((signed short *)&req->reply[6]);
 809                                 voltage = (req->reply[8] << 8) | req->reply[9];
 810                                 break;
 811                         default:
 812                                 pr_warn("pmu.c: unrecognized battery info, "
 813                                         "len: %d, %4ph\n", req->reply_len,
 814                                                            req->reply);
 815                                 break;
 816                 }
 817         }
 818
 819         if ((req->reply[1] & 0x01) && (amperage > 0))
 820                 bat_flags |= PMU_BATT_CHARGING;
 821
 822         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 823         pmu_batteries[pmu_cur_battery].charge = capa;
 824         pmu_batteries[pmu_cur_battery].max_charge = max;
 825         pmu_batteries[pmu_cur_battery].amperage = amperage;
 826         pmu_batteries[pmu_cur_battery].voltage = voltage;
 827         if (amperage) {
 828                 if ((req->reply[1] & 0x01) && (amperage > 0))
 829                         pmu_batteries[pmu_cur_battery].time_remaining
 830                                 = ((max-capa) * 3600) / amperage;
 831                 else
 832                         pmu_batteries[pmu_cur_battery].time_remaining
 833                                 = (capa * 3600) / (-amperage);
 834         } else
 835                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 836
 837         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 838
 839         clear_bit(0, &async_req_locks);
 840 }
 841
 842 static void
 843 query_battery_state(void)
 844 {
 845         if (test_and_set_bit(0, &async_req_locks))
 846                 return;
 847         if (pmu_kind == PMU_OHARE_BASED)
 848                 pmu_request(&batt_req, done_battery_state_ohare,
 849                         1, PMU_BATTERY_STATE);
 850         else
 851                 pmu_request(&batt_req, done_battery_state_smart,
 852                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 853 }
 854
 855 static int pmu_info_proc_show(struct seq_file *m, void *v)
 856 {
 857         seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 858         seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
 859         seq_printf(m, "AC Power               : %d\n",
 860                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 861         seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
 862
 863         return 0;
 864 }
 865
 866 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 867 {
 868         int i;
 869         static const char *irq_names[NUM_IRQ_STATS] = {
 870                 "Unknown interrupt (type 0)",
 871                 "Unknown interrupt (type 1)",
 872                 "PC-Card eject button",
 873                 "Sound/Brightness button",
 874                 "ADB message",
 875                 "Battery state change",
 876                 "Environment interrupt",
 877                 "Tick timer",
 878                 "Ghost interrupt (zero len)",
 879                 "Empty interrupt (empty mask)",
 880                 "Max irqs in a row",
 881                 "Total CB1 triggered events",
 882                 "Total GPIO1 triggered events",
 883         };
 884
 885         for (i = 0; i < NUM_IRQ_STATS; i++) {
 886                 seq_printf(m, " %2u: %10u (%s)\n",
 887                              i, pmu_irq_stats[i], irq_names[i]);
 888         }
 889         return 0;
 890 }
 891
 892 static int pmu_battery_proc_show(struct seq_file *m, void *v)
 893 {
 894         long batnum = (long)m->private;
 895
 896         seq_putc(m, '\n');
 897         seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
 898         seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
 899         seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
 900         seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
 901         seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
 902         seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
 903         return 0;
 904 }
 905
 906 static int pmu_options_proc_show(struct seq_file *m, void *v)
 907 {
 908 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 909         if (pmu_kind == PMU_KEYLARGO_BASED &&
 910             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 911                 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 912 #endif
 913         if (pmu_kind == PMU_KEYLARGO_BASED)
 914                 seq_printf(m, "server_mode=%d\n", option_server_mode);
 915
 916         return 0;
 917 }
 918
 919 static int pmu_options_proc_open(struct inode *inode, struct file *file)
 920 {
 921         return single_open(file, pmu_options_proc_show, NULL);
 922 }
 923
 924 static ssize_t pmu_options_proc_write(struct file *file,
 925                 const char __user *buffer, size_t count, loff_t *pos)
 926 {
 927         char tmp[33];
 928         char *label, *val;
 929         size_t fcount = count;
 930
 931         if (!count)
 932                 return -EINVAL;
 933         if (count > 32)
 934                 count = 32;
 935         if (copy_from_user(tmp, buffer, count))
 936                 return -EFAULT;
 937         tmp[count] = 0;
 938
 939         label = tmp;
 940         while(*label == ' ')
 941                 label++;
 942         val = label;
 943         while(*val && (*val != '=')) {
 944                 if (*val == ' ')
 945                         *val = 0;
 946                 val++;
 947         }
 948         if ((*val) == 0)
 949                 return -EINVAL;
 950         *(val++) = 0;
 951         while(*val == ' ')
 952                 val++;
 953 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 954         if (pmu_kind == PMU_KEYLARGO_BASED &&
 955             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 956                 if (!strcmp(label, "lid_wakeup"))
 957                         option_lid_wakeup = ((*val) == '1');
 958 #endif
 959         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 960                 int new_value;
 961                 new_value = ((*val) == '1');
 962                 if (new_value != option_server_mode)
 963                         pmu_set_server_mode(new_value);
 964         }
 965         return fcount;
 966 }
 967
 968 static const struct proc_ops pmu_options_proc_ops = {
 969         .proc_open      = pmu_options_proc_open,
 970         .proc_read      = seq_read,
 971         .proc_lseek     = seq_lseek,
 972         .proc_release   = single_release,
 973         .proc_write     = pmu_options_proc_write,
 974 };
 975
 976 #ifdef CONFIG_ADB
 977 /* Send an ADB command */
 978 static int pmu_send_request(struct adb_request *req, int sync)
 979 {
 980         int i, ret;
 981
 982         if (pmu_state == uninitialized || !pmu_fully_inited) {
 983                 req->complete = 1;
 984                 return -ENXIO;
 985         }
 986
 987         ret = -EINVAL;
 988
 989         switch (req->data[0]) {
 990         case PMU_PACKET:
 991                 for (i = 0; i < req->nbytes - 1; ++i)
 992                         req->data[i] = req->data[i+1];
 993                 --req->nbytes;
 994                 if (pmu_data_len[req->data[0]][1] != 0) {
 995                         req->reply[0] = ADB_RET_OK;
 996                         req->reply_len = 1;
 997                 } else
 998                         req->reply_len = 0;
 999                 ret = pmu_queue_request(req);
1000                 break;
1001         case CUDA_PACKET:
1002                 switch (req->data[1]) {
1003                 case CUDA_GET_TIME:
1004                         if (req->nbytes != 2)
1005                                 break;
1006                         req->data[0] = PMU_READ_RTC;
1007                         req->nbytes = 1;
1008                         req->reply_len = 3;
1009                         req->reply[0] = CUDA_PACKET;
1010                         req->reply[1] = 0;
1011                         req->reply[2] = CUDA_GET_TIME;
1012                         ret = pmu_queue_request(req);
1013                         break;
1014                 case CUDA_SET_TIME:
1015                         if (req->nbytes != 6)
1016                                 break;
1017                         req->data[0] = PMU_SET_RTC;
1018                         req->nbytes = 5;
1019                         for (i = 1; i <= 4; ++i)
1020                                 req->data[i] = req->data[i+1];
1021                         req->reply_len = 3;
1022                         req->reply[0] = CUDA_PACKET;
1023                         req->reply[1] = 0;
1024                         req->reply[2] = CUDA_SET_TIME;
1025                         ret = pmu_queue_request(req);
1026                         break;
1027                 }
1028                 break;
1029         case ADB_PACKET:
1030                 if (!pmu_has_adb)
1031                         return -ENXIO;
1032                 for (i = req->nbytes - 1; i > 1; --i)
1033                         req->data[i+2] = req->data[i];
1034                 req->data[3] = req->nbytes - 2;
1035                 req->data[2] = pmu_adb_flags;
1036                 /*req->data[1] = req->data[1];*/
1037                 req->data[0] = PMU_ADB_CMD;
1038                 req->nbytes += 2;
1039                 req->reply_expected = 1;
1040                 req->reply_len = 0;
1041                 ret = pmu_queue_request(req);
1042                 break;
1043         }
1044         if (ret) {
1045                 req->complete = 1;
1046                 return ret;
1047         }
1048
1049         if (sync)
1050                 while (!req->complete)
1051                         pmu_poll();
1052
1053         return 0;
1054 }
1055
1056 /* Enable/disable autopolling */
1057 static int __pmu_adb_autopoll(int devs)
1058 {
1059         struct adb_request req;
1060
1061         if (devs) {
1062                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1063                             adb_dev_map >> 8, adb_dev_map);
1064                 pmu_adb_flags = 2;
1065         } else {
1066                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1067                 pmu_adb_flags = 0;
1068         }
1069         while (!req.complete)
1070                 pmu_poll();
1071         return 0;
1072 }
1073
1074 static int pmu_adb_autopoll(int devs)
1075 {
1076         if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1077                 return -ENXIO;
1078
1079         adb_dev_map = devs;
1080         return __pmu_adb_autopoll(devs);
1081 }
1082
1083 /* Reset the ADB bus */
1084 static int pmu_adb_reset_bus(void)
1085 {
1086         struct adb_request req;
1087         int save_autopoll = adb_dev_map;
1088
1089         if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1090                 return -ENXIO;
1091
1092         /* anyone got a better idea?? */
1093         __pmu_adb_autopoll(0);
1094
1095         req.nbytes = 4;
1096         req.done = NULL;
1097         req.data[0] = PMU_ADB_CMD;
1098         req.data[1] = ADB_BUSRESET;
1099         req.data[2] = 0;
1100         req.data[3] = 0;
1101         req.data[4] = 0;
1102         req.reply_len = 0;
1103         req.reply_expected = 1;
1104         if (pmu_queue_request(&req) != 0) {
1105                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1106                 return -EIO;
1107         }
1108         pmu_wait_complete(&req);
1109
1110         if (save_autopoll != 0)
1111                 __pmu_adb_autopoll(save_autopoll);
1112
1113         return 0;
1114 }
1115 #endif /* CONFIG_ADB */
1116
1117 /* Construct and send a pmu request */
1118 int
1119 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1120             int nbytes, ...)
1121 {
1122         va_list list;
1123         int i;
1124
1125         if (pmu_state == uninitialized)
1126                 return -ENXIO;
1127
1128         if (nbytes < 0 || nbytes > 32) {
1129                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1130                 req->complete = 1;
1131                 return -EINVAL;
1132         }
1133         req->nbytes = nbytes;
1134         req->done = done;
1135         va_start(list, nbytes);
1136         for (i = 0; i < nbytes; ++i)
1137                 req->data[i] = va_arg(list, int);
1138         va_end(list);
1139         req->reply_len = 0;
1140         req->reply_expected = 0;
1141         return pmu_queue_request(req);
1142 }
1143
1144 int
1145 pmu_queue_request(struct adb_request *req)
1146 {
1147         unsigned long flags;
1148         int nsend;
1149
1150         if (pmu_state == uninitialized) {
1151                 req->complete = 1;
1152                 return -ENXIO;
1153         }
1154         if (req->nbytes <= 0) {
1155                 req->complete = 1;
1156                 return 0;
1157         }
1158         nsend = pmu_data_len[req->data[0]][0];
1159         if (nsend >= 0 && req->nbytes != nsend + 1) {
1160                 req->complete = 1;
1161                 return -EINVAL;
1162         }
1163
1164         req->next = NULL;
1165         req->sent = 0;
1166         req->complete = 0;
1167
1168         spin_lock_irqsave(&pmu_lock, flags);
1169         if (current_req) {
1170                 last_req->next = req;
1171                 last_req = req;
1172         } else {
1173                 current_req = req;
1174                 last_req = req;
1175                 if (pmu_state == idle)
1176                         pmu_start();
1177         }
1178         spin_unlock_irqrestore(&pmu_lock, flags);
1179
1180         return 0;
1181 }
1182
1183 static inline void
1184 wait_for_ack(void)
1185 {
1186         /* Sightly increased the delay, I had one occurrence of the message
1187          * reported
1188          */
1189         int timeout = 4000;
1190         while ((in_8(&via2[B]) & TACK) == 0) {
1191                 if (--timeout < 0) {
1192                         printk(KERN_ERR "PMU not responding (!ack)\n");
1193                         return;
1194                 }
1195                 udelay(10);
1196         }
1197 }
1198
1199 /* New PMU seems to be very sensitive to those timings, so we make sure
1200  * PCI is flushed immediately */
1201 static inline void
1202 send_byte(int x)
1203 {
1204         out_8(&via1[ACR], in_8(&via1[ACR]) | SR_OUT | SR_EXT);
1205         out_8(&via1[SR], x);
1206         out_8(&via2[B], in_8(&via2[B]) & ~TREQ);        /* assert TREQ */
1207         (void)in_8(&via2[B]);
1208 }
1209
1210 static inline void
1211 recv_byte(void)
1212 {
1213         out_8(&via1[ACR], (in_8(&via1[ACR]) & ~SR_OUT) | SR_EXT);
1214         in_8(&via1[SR]);                /* resets SR */
1215         out_8(&via2[B], in_8(&via2[B]) & ~TREQ);
1216         (void)in_8(&via2[B]);
1217 }
1218
1219 static inline void
1220 pmu_done(struct adb_request *req)
1221 {
1222         void (*done)(struct adb_request *) = req->done;
1223         mb();
1224         req->complete = 1;
1225         /* Here, we assume that if the request has a done member, the
1226          * struct request will survive to setting req->complete to 1
1227          */
1228         if (done)
1229                 (*done)(req);
1230 }
1231
1232 static void
1233 pmu_start(void)
1234 {
1235         struct adb_request *req;
1236
1237         /* assert pmu_state == idle */
1238         /* get the packet to send */
1239         req = current_req;
1240         if (!req || pmu_state != idle
1241             || (/*req->reply_expected && */req_awaiting_reply))
1242                 return;
1243
1244         pmu_state = sending;
1245         data_index = 1;
1246         data_len = pmu_data_len[req->data[0]][0];
1247
1248         /* Sounds safer to make sure ACK is high before writing. This helped
1249          * kill a problem with ADB and some iBooks
1250          */
1251         wait_for_ack();
1252         /* set the shift register to shift out and send a byte */
1253         send_byte(req->data[0]);
1254 }
1255
1256 void
1257 pmu_poll(void)
1258 {
1259         if (pmu_state == uninitialized)
1260                 return;
1261         if (disable_poll)
1262                 return;
1263         via_pmu_interrupt(0, NULL);
1264 }
1265
1266 void
1267 pmu_poll_adb(void)
1268 {
1269         if (pmu_state == uninitialized)
1270                 return;
1271         if (disable_poll)
1272                 return;
1273         /* Kicks ADB read when PMU is suspended */
1274         adb_int_pending = 1;
1275         do {
1276                 via_pmu_interrupt(0, NULL);
1277         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1278                 || req_awaiting_reply));
1279 }
1280
1281 void
1282 pmu_wait_complete(struct adb_request *req)
1283 {
1284         if (pmu_state == uninitialized)
1285                 return;
1286         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1287                 via_pmu_interrupt(0, NULL);
1288 }
1289
1290 /* This function loops until the PMU is idle and prevents it from
1291  * anwsering to ADB interrupts. pmu_request can still be called.
1292  * This is done to avoid spurrious shutdowns when we know we'll have
1293  * interrupts switched off for a long time
1294  */
1295 void
1296 pmu_suspend(void)
1297 {
1298         unsigned long flags;
1299
1300         if (pmu_state == uninitialized)
1301                 return;
1302
1303         spin_lock_irqsave(&pmu_lock, flags);
1304         pmu_suspended++;
1305         if (pmu_suspended > 1) {
1306                 spin_unlock_irqrestore(&pmu_lock, flags);
1307                 return;
1308         }
1309
1310         do {
1311                 spin_unlock_irqrestore(&pmu_lock, flags);
1312                 if (req_awaiting_reply)
1313                         adb_int_pending = 1;
1314                 via_pmu_interrupt(0, NULL);
1315                 spin_lock_irqsave(&pmu_lock, flags);
1316                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1317                         if (gpio_irq >= 0)
1318                                 disable_irq_nosync(gpio_irq);
1319                         out_8(&via1[IER], CB1_INT | IER_CLR);
1320                         spin_unlock_irqrestore(&pmu_lock, flags);
1321                         break;
1322                 }
1323         } while (1);
1324 }
1325
1326 void
1327 pmu_resume(void)
1328 {
1329         unsigned long flags;
1330
1331         if (pmu_state == uninitialized || pmu_suspended < 1)
1332                 return;
1333
1334         spin_lock_irqsave(&pmu_lock, flags);
1335         pmu_suspended--;
1336         if (pmu_suspended > 0) {
1337                 spin_unlock_irqrestore(&pmu_lock, flags);
1338                 return;
1339         }
1340         adb_int_pending = 1;
1341         if (gpio_irq >= 0)
1342                 enable_irq(gpio_irq);
1343         out_8(&via1[IER], CB1_INT | IER_SET);
1344         spin_unlock_irqrestore(&pmu_lock, flags);
1345         pmu_poll();
1346 }
1347
1348 /* Interrupt data could be the result data from an ADB cmd */
1349 static void
1350 pmu_handle_data(unsigned char *data, int len)
1351 {
1352         unsigned char ints;
1353         int idx;
1354         int i = 0;
1355
1356         asleep = 0;
1357         if (drop_interrupts || len < 1) {
1358                 adb_int_pending = 0;
1359                 pmu_irq_stats[8]++;
1360                 return;
1361         }
1362
1363         /* Get PMU interrupt mask */
1364         ints = data[0];
1365
1366         /* Record zero interrupts for stats */
1367         if (ints == 0)
1368                 pmu_irq_stats[9]++;
1369
1370         /* Hack to deal with ADB autopoll flag */
1371         if (ints & PMU_INT_ADB)
1372                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1373
1374 next:
1375         if (ints == 0) {
1376                 if (i > pmu_irq_stats[10])
1377                         pmu_irq_stats[10] = i;
1378                 return;
1379         }
1380         i++;
1381
1382         idx = ffs(ints) - 1;
1383         ints &= ~BIT(idx);
1384
1385         pmu_irq_stats[idx]++;
1386
1387         /* Note: for some reason, we get an interrupt with len=1,
1388          * data[0]==0 after each normal ADB interrupt, at least
1389          * on the Pismo. Still investigating...  --BenH
1390          */
1391         switch (BIT(idx)) {
1392         case PMU_INT_ADB:
1393                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1394                         struct adb_request *req = req_awaiting_reply;
1395                         if (!req) {
1396                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1397                                 return;
1398                         }
1399                         req_awaiting_reply = NULL;
1400                         if (len <= 2)
1401                                 req->reply_len = 0;
1402                         else {
1403                                 memcpy(req->reply, data + 1, len - 1);
1404                                 req->reply_len = len - 1;
1405                         }
1406                         pmu_done(req);
1407                 } else {
1408 #ifdef CONFIG_XMON
1409                         if (len == 4 && data[1] == 0x2c) {
1410                                 extern int xmon_wants_key, xmon_adb_keycode;
1411                                 if (xmon_wants_key) {
1412                                         xmon_adb_keycode = data[2];
1413                                         return;
1414                                 }
1415                         }
1416 #endif /* CONFIG_XMON */
1417 #ifdef CONFIG_ADB
1418                         /*
1419                          * XXX On the [23]400 the PMU gives us an up
1420                          * event for keycodes 0x74 or 0x75 when the PC
1421                          * card eject buttons are released, so we
1422                          * ignore those events.
1423                          */
1424                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1425                               && data[1] == 0x2c && data[3] == 0xff
1426                               && (data[2] & ~1) == 0xf4))
1427                                 adb_input(data+1, len-1, 1);
1428 #endif /* CONFIG_ADB */
1429                 }
1430                 break;
1431
1432         /* Sound/brightness button pressed */
1433         case PMU_INT_SNDBRT:
1434 #ifdef CONFIG_PMAC_BACKLIGHT
1435                 if (len == 3)
1436                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1437 #endif
1438                 break;
1439
1440         /* Tick interrupt */
1441         case PMU_INT_TICK:
1442                 /* Environment or tick interrupt, query batteries */
1443                 if (pmu_battery_count) {
1444                         if ((--query_batt_timer) == 0) {
1445                                 query_battery_state();
1446                                 query_batt_timer = BATTERY_POLLING_COUNT;
1447                         }
1448                 }
1449                 break;
1450
1451         case PMU_INT_ENVIRONMENT:
1452                 if (pmu_battery_count)
1453                         query_battery_state();
1454                 pmu_pass_intr(data, len);
1455                 /* len == 6 is probably a bad check. But how do I
1456                  * know what PMU versions send what events here? */
1457                 if (IS_ENABLED(CONFIG_ADB_PMU_EVENT) && len == 6) {
1458                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1459                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1460                 }
1461                 break;
1462
1463         default:
1464                pmu_pass_intr(data, len);
1465         }
1466         goto next;
1467 }
1468
1469 static struct adb_request*
1470 pmu_sr_intr(void)
1471 {
1472         struct adb_request *req;
1473         int bite = 0;
1474
1475         if (in_8(&via2[B]) & TREQ) {
1476                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via2[B]));
1477                 return NULL;
1478         }
1479         /* The ack may not yet be low when we get the interrupt */
1480         while ((in_8(&via2[B]) & TACK) != 0)
1481                         ;
1482
1483         /* if reading grab the byte, and reset the interrupt */
1484         if (pmu_state == reading || pmu_state == reading_intr)
1485                 bite = in_8(&via1[SR]);
1486
1487         /* reset TREQ and wait for TACK to go high */
1488         out_8(&via2[B], in_8(&via2[B]) | TREQ);
1489         wait_for_ack();
1490
1491         switch (pmu_state) {
1492         case sending:
1493                 req = current_req;
1494                 if (data_len < 0) {
1495                         data_len = req->nbytes - 1;
1496                         send_byte(data_len);
1497                         break;
1498                 }
1499                 if (data_index <= data_len) {
1500                         send_byte(req->data[data_index++]);
1501                         break;
1502                 }
1503                 req->sent = 1;
1504                 data_len = pmu_data_len[req->data[0]][1];
1505                 if (data_len == 0) {
1506                         pmu_state = idle;
1507                         current_req = req->next;
1508                         if (req->reply_expected)
1509                                 req_awaiting_reply = req;
1510                         else
1511                                 return req;
1512                 } else {
1513                         pmu_state = reading;
1514                         data_index = 0;
1515                         reply_ptr = req->reply + req->reply_len;
1516                         recv_byte();
1517                 }
1518                 break;
1519
1520         case intack:
1521                 data_index = 0;
1522                 data_len = -1;
1523                 pmu_state = reading_intr;
1524                 reply_ptr = interrupt_data[int_data_last];
1525                 recv_byte();
1526                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1527                         enable_irq(gpio_irq);
1528                         gpio_irq_enabled = 1;
1529                 }
1530                 break;
1531
1532         case reading:
1533         case reading_intr:
1534                 if (data_len == -1) {
1535                         data_len = bite;
1536                         if (bite > 32)
1537                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1538                 } else if (data_index < 32) {
1539                         reply_ptr[data_index++] = bite;
1540                 }
1541                 if (data_index < data_len) {
1542                         recv_byte();
1543                         break;
1544                 }
1545
1546                 if (pmu_state == reading_intr) {
1547                         pmu_state = idle;
1548                         int_data_state[int_data_last] = int_data_ready;
1549                         interrupt_data_len[int_data_last] = data_len;
1550                 } else {
1551                         req = current_req;
1552                         /*
1553                          * For PMU sleep and freq change requests, we lock the
1554                          * PMU until it's explicitly unlocked. This avoids any
1555                          * spurrious event polling getting in
1556                          */
1557                         current_req = req->next;
1558                         req->reply_len += data_index;
1559                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1560                                 pmu_state = locked;
1561                         else
1562                                 pmu_state = idle;
1563                         return req;
1564                 }
1565                 break;
1566
1567         default:
1568                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1569                        pmu_state);
1570         }
1571         return NULL;
1572 }
1573
1574 static irqreturn_t
1575 via_pmu_interrupt(int irq, void *arg)
1576 {
1577         unsigned long flags;
1578         int intr;
1579         int nloop = 0;
1580         int int_data = -1;
1581         struct adb_request *req = NULL;
1582         int handled = 0;
1583
1584         /* This is a bit brutal, we can probably do better */
1585         spin_lock_irqsave(&pmu_lock, flags);
1586         ++disable_poll;
1587
1588         for (;;) {
1589                 /* On 68k Macs, VIA interrupts are dispatched individually.
1590                  * Unless we are polling, the relevant IRQ flag has already
1591                  * been cleared.
1592                  */
1593                 intr = 0;
1594                 if (IS_ENABLED(CONFIG_PPC_PMAC) || !irq) {
1595                         intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT);
1596                         out_8(&via1[IFR], intr);
1597                 }
1598 #ifndef CONFIG_PPC_PMAC
1599                 switch (irq) {
1600                 case IRQ_MAC_ADB_CL:
1601                         intr = CB1_INT;
1602                         break;
1603                 case IRQ_MAC_ADB_SR:
1604                         intr = SR_INT;
1605                         break;
1606                 }
1607 #endif
1608                 if (intr == 0)
1609                         break;
1610                 handled = 1;
1611                 if (++nloop > 1000) {
1612                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1613                                "intr=%x, ier=%x pmu_state=%d\n",
1614                                intr, in_8(&via1[IER]), pmu_state);
1615                         break;
1616                 }
1617                 if (intr & CB1_INT) {
1618                         adb_int_pending = 1;
1619                         pmu_irq_stats[11]++;
1620                 }
1621                 if (intr & SR_INT) {
1622                         req = pmu_sr_intr();
1623                         if (req)
1624                                 break;
1625                 }
1626 #ifndef CONFIG_PPC_PMAC
1627                 break;
1628 #endif
1629         }
1630
1631 recheck:
1632         if (pmu_state == idle) {
1633                 if (adb_int_pending) {
1634                         if (int_data_state[0] == int_data_empty)
1635                                 int_data_last = 0;
1636                         else if (int_data_state[1] == int_data_empty)
1637                                 int_data_last = 1;
1638                         else
1639                                 goto no_free_slot;
1640                         pmu_state = intack;
1641                         int_data_state[int_data_last] = int_data_fill;
1642                         /* Sounds safer to make sure ACK is high before writing.
1643                          * This helped kill a problem with ADB and some iBooks
1644                          */
1645                         wait_for_ack();
1646                         send_byte(PMU_INT_ACK);
1647                         adb_int_pending = 0;
1648                 } else if (current_req)
1649                         pmu_start();
1650         }
1651 no_free_slot:
1652         /* Mark the oldest buffer for flushing */
1653         if (int_data_state[!int_data_last] == int_data_ready) {
1654                 int_data_state[!int_data_last] = int_data_flush;
1655                 int_data = !int_data_last;
1656         } else if (int_data_state[int_data_last] == int_data_ready) {
1657                 int_data_state[int_data_last] = int_data_flush;
1658                 int_data = int_data_last;
1659         }
1660         --disable_poll;
1661         spin_unlock_irqrestore(&pmu_lock, flags);
1662
1663         /* Deal with completed PMU requests outside of the lock */
1664         if (req) {
1665                 pmu_done(req);
1666                 req = NULL;
1667         }
1668
1669         /* Deal with interrupt datas outside of the lock */
1670         if (int_data >= 0) {
1671                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1672                 spin_lock_irqsave(&pmu_lock, flags);
1673                 ++disable_poll;
1674                 int_data_state[int_data] = int_data_empty;
1675                 int_data = -1;
1676                 goto recheck;
1677         }
1678
1679         return IRQ_RETVAL(handled);
1680 }
1681
1682 void
1683 pmu_unlock(void)
1684 {
1685         unsigned long flags;
1686
1687         spin_lock_irqsave(&pmu_lock, flags);
1688         if (pmu_state == locked)
1689                 pmu_state = idle;
1690         adb_int_pending = 1;
1691         spin_unlock_irqrestore(&pmu_lock, flags);
1692 }
1693
1694
1695 static __maybe_unused irqreturn_t
1696 gpio1_interrupt(int irq, void *arg)
1697 {
1698         unsigned long flags;
1699
1700         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1701                 spin_lock_irqsave(&pmu_lock, flags);
1702                 if (gpio_irq_enabled > 0) {
1703                         disable_irq_nosync(gpio_irq);
1704                         gpio_irq_enabled = 0;
1705                 }
1706                 pmu_irq_stats[12]++;
1707                 adb_int_pending = 1;
1708                 spin_unlock_irqrestore(&pmu_lock, flags);
1709                 via_pmu_interrupt(0, NULL);
1710                 return IRQ_HANDLED;
1711         }
1712         return IRQ_NONE;
1713 }
1714
1715 void
1716 pmu_enable_irled(int on)
1717 {
1718         struct adb_request req;
1719
1720         if (pmu_state == uninitialized)
1721                 return ;
1722         if (pmu_kind == PMU_KEYLARGO_BASED)
1723                 return ;
1724
1725         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1726             (on ? PMU_POW_ON : PMU_POW_OFF));
1727         pmu_wait_complete(&req);
1728 }
1729
1730 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
1731 #define RTC_OFFSET      2082844800
1732
1733 time64_t pmu_get_time(void)
1734 {
1735         struct adb_request req;
1736         u32 now;
1737
1738         if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
1739                 return 0;
1740         pmu_wait_complete(&req);
1741         if (req.reply_len != 4)
1742                 pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1743         now = (req.reply[0] << 24) + (req.reply[1] << 16) +
1744               (req.reply[2] << 8) + req.reply[3];
1745         return (time64_t)now - RTC_OFFSET;
1746 }
1747
1748 int pmu_set_rtc_time(struct rtc_time *tm)
1749 {
1750         u32 now;
1751         struct adb_request req;
1752
1753         now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET);
1754         if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
1755                         now >> 24, now >> 16, now >> 8, now) < 0)
1756                 return -ENXIO;
1757         pmu_wait_complete(&req);
1758         if (req.reply_len != 0)
1759                 pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1760         return 0;
1761 }
1762
1763 void
1764 pmu_restart(void)
1765 {
1766         struct adb_request req;
1767
1768         if (pmu_state == uninitialized)
1769                 return;
1770
1771         local_irq_disable();
1772
1773         drop_interrupts = 1;
1774
1775         if (pmu_kind != PMU_KEYLARGO_BASED) {
1776                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1777                                                 PMU_INT_TICK );
1778                 while(!req.complete)
1779                         pmu_poll();
1780         }
1781
1782         pmu_request(&req, NULL, 1, PMU_RESET);
1783         pmu_wait_complete(&req);
1784         for (;;)
1785                 ;
1786 }
1787
1788 void
1789 pmu_shutdown(void)
1790 {
1791         struct adb_request req;
1792
1793         if (pmu_state == uninitialized)
1794                 return;
1795
1796         local_irq_disable();
1797
1798         drop_interrupts = 1;
1799
1800         if (pmu_kind != PMU_KEYLARGO_BASED) {
1801                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1802                                                 PMU_INT_TICK );
1803                 pmu_wait_complete(&req);
1804         } else {
1805                 /* Disable server mode on shutdown or we'll just
1806                  * wake up again
1807                  */
1808                 pmu_set_server_mode(0);
1809         }
1810
1811         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1812                     'M', 'A', 'T', 'T');
1813         pmu_wait_complete(&req);
1814         for (;;)
1815                 ;
1816 }
1817
1818 int
1819 pmu_present(void)
1820 {
1821         return pmu_state != uninitialized;
1822 }
1823
1824 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1825 /*
1826  * Put the powerbook to sleep.
1827  */
1828
1829 static u32 save_via[8];
1830 static int __fake_sleep;
1831
1832 static void
1833 save_via_state(void)
1834 {
1835         save_via[0] = in_8(&via1[ANH]);
1836         save_via[1] = in_8(&via1[DIRA]);
1837         save_via[2] = in_8(&via1[B]);
1838         save_via[3] = in_8(&via1[DIRB]);
1839         save_via[4] = in_8(&via1[PCR]);
1840         save_via[5] = in_8(&via1[ACR]);
1841         save_via[6] = in_8(&via1[T1CL]);
1842         save_via[7] = in_8(&via1[T1CH]);
1843 }
1844 static void
1845 restore_via_state(void)
1846 {
1847         out_8(&via1[ANH],  save_via[0]);
1848         out_8(&via1[DIRA], save_via[1]);
1849         out_8(&via1[B],    save_via[2]);
1850         out_8(&via1[DIRB], save_via[3]);
1851         out_8(&via1[PCR],  save_via[4]);
1852         out_8(&via1[ACR],  save_via[5]);
1853         out_8(&via1[T1CL], save_via[6]);
1854         out_8(&via1[T1CH], save_via[7]);
1855         out_8(&via1[IER], IER_CLR | 0x7f);      /* disable all intrs */
1856         out_8(&via1[IFR], 0x7f);                        /* clear IFR */
1857         out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
1858 }
1859
1860 #define GRACKLE_PM      (1<<7)
1861 #define GRACKLE_DOZE    (1<<5)
1862 #define GRACKLE_NAP     (1<<4)
1863 #define GRACKLE_SLEEP   (1<<3)
1864
1865 static int powerbook_sleep_grackle(void)
1866 {
1867         unsigned long save_l2cr;
1868         unsigned short pmcr1;
1869         struct adb_request req;
1870         struct pci_dev *grackle;
1871
1872         grackle = pci_get_domain_bus_and_slot(0, 0, 0);
1873         if (!grackle)
1874                 return -ENODEV;
1875
1876         /* Turn off various things. Darwin does some retry tests here... */
1877         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1878         pmu_wait_complete(&req);
1879         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1880                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1881         pmu_wait_complete(&req);
1882
1883         /* For 750, save backside cache setting and disable it */
1884         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1885
1886         if (!__fake_sleep) {
1887                 /* Ask the PMU to put us to sleep */
1888                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1889                 pmu_wait_complete(&req);
1890         }
1891
1892         /* The VIA is supposed not to be restored correctly*/
1893         save_via_state();
1894         /* We shut down some HW */
1895         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1896
1897         pci_read_config_word(grackle, 0x70, &pmcr1);
1898         /* Apparently, MacOS uses NAP mode for Grackle ??? */
1899         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1900         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1901         pci_write_config_word(grackle, 0x70, pmcr1);
1902
1903         /* Call low-level ASM sleep handler */
1904         if (__fake_sleep)
1905                 mdelay(5000);
1906         else
1907                 low_sleep_handler();
1908
1909         /* We're awake again, stop grackle PM */
1910         pci_read_config_word(grackle, 0x70, &pmcr1);
1911         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1912         pci_write_config_word(grackle, 0x70, pmcr1);
1913
1914         pci_dev_put(grackle);
1915
1916         /* Make sure the PMU is idle */
1917         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1918         restore_via_state();
1919
1920         /* Restore L2 cache */
1921         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1922                 _set_L2CR(save_l2cr);
1923
1924         /* Restore userland MMU context */
1925         switch_mmu_context(NULL, current->active_mm, NULL);
1926
1927         /* Power things up */
1928         pmu_unlock();
1929         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1930         pmu_wait_complete(&req);
1931         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1932                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1933         pmu_wait_complete(&req);
1934         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1935                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1936         pmu_wait_complete(&req);
1937
1938         return 0;
1939 }
1940
1941 static int
1942 powerbook_sleep_Core99(void)
1943 {
1944         unsigned long save_l2cr;
1945         unsigned long save_l3cr;
1946         struct adb_request req;
1947
1948         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1949                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1950                 return -ENOSYS;
1951         }
1952
1953         if (num_online_cpus() > 1 || cpu_is_offline(0))
1954                 return -EAGAIN;
1955
1956         /* Stop environment and ADB interrupts */
1957         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1958         pmu_wait_complete(&req);
1959
1960         /* Tell PMU what events will wake us up */
1961         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1962                 0xff, 0xff);
1963         pmu_wait_complete(&req);
1964         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1965                 0, PMU_PWR_WAKEUP_KEY |
1966                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1967         pmu_wait_complete(&req);
1968
1969         /* Save the state of the L2 and L3 caches */
1970         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
1971         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1972
1973         if (!__fake_sleep) {
1974                 /* Ask the PMU to put us to sleep */
1975                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1976                 pmu_wait_complete(&req);
1977         }
1978
1979         /* The VIA is supposed not to be restored correctly*/
1980         save_via_state();
1981
1982         /* Shut down various ASICs. There's a chance that we can no longer
1983          * talk to the PMU after this, so I moved it to _after_ sending the
1984          * sleep command to it. Still need to be checked.
1985          */
1986         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1987
1988         /* Call low-level ASM sleep handler */
1989         if (__fake_sleep)
1990                 mdelay(5000);
1991         else
1992                 low_sleep_handler();
1993
1994         /* Restore Apple core ASICs state */
1995         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1996
1997         /* Restore VIA */
1998         restore_via_state();
1999
2000         /* tweak LPJ before cpufreq is there */
2001         loops_per_jiffy *= 2;
2002
2003         /* Restore video */
2004         pmac_call_early_video_resume();
2005
2006         /* Restore L2 cache */
2007         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2008                 _set_L2CR(save_l2cr);
2009         /* Restore L3 cache */
2010         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2011                 _set_L3CR(save_l3cr);
2012
2013         /* Restore userland MMU context */
2014         switch_mmu_context(NULL, current->active_mm, NULL);
2015
2016         /* Tell PMU we are ready */
2017         pmu_unlock();
2018         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2019         pmu_wait_complete(&req);
2020         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2021         pmu_wait_complete(&req);
2022
2023         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2024         loops_per_jiffy /= 2;
2025
2026         return 0;
2027 }
2028
2029 #define PB3400_MEM_CTRL         0xf8000000
2030 #define PB3400_MEM_CTRL_SLEEP   0x70
2031
2032 static void __iomem *pb3400_mem_ctrl;
2033
2034 static void powerbook_sleep_init_3400(void)
2035 {
2036         /* map in the memory controller registers */
2037         pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2038         if (pb3400_mem_ctrl == NULL)
2039                 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
2040 }
2041
2042 static int powerbook_sleep_3400(void)
2043 {
2044         int i, x;
2045         unsigned int hid0;
2046         unsigned long msr;
2047         struct adb_request sleep_req;
2048         unsigned int __iomem *mem_ctrl_sleep;
2049
2050         if (pb3400_mem_ctrl == NULL)
2051                 return -ENOMEM;
2052         mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2053
2054         /* Set the memory controller to keep the memory refreshed
2055            while we're asleep */
2056         for (i = 0x403f; i >= 0x4000; --i) {
2057                 out_be32(mem_ctrl_sleep, i);
2058                 do {
2059                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2060                 } while (x == 0);
2061                 if (x >= 0x100)
2062                         break;
2063         }
2064
2065         /* Ask the PMU to put us to sleep */
2066         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2067         pmu_wait_complete(&sleep_req);
2068         pmu_unlock();
2069
2070         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2071
2072         asleep = 1;
2073
2074         /* Put the CPU into sleep mode */
2075         hid0 = mfspr(SPRN_HID0);
2076         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2077         mtspr(SPRN_HID0, hid0);
2078         local_irq_enable();
2079         msr = mfmsr() | MSR_POW;
2080         while (asleep) {
2081                 mb();
2082                 mtmsr(msr);
2083                 isync();
2084         }
2085         local_irq_disable();
2086
2087         /* OK, we're awake again, start restoring things */
2088         out_be32(mem_ctrl_sleep, 0x3f);
2089         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2090
2091         return 0;
2092 }
2093
2094 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2095
2096 /*
2097  * Support for /dev/pmu device
2098  */
2099 #define RB_SIZE         0x10
2100 struct pmu_private {
2101         struct list_head list;
2102         int     rb_get;
2103         int     rb_put;
2104         struct rb_entry {
2105                 unsigned short len;
2106                 unsigned char data[16];
2107         }       rb_buf[RB_SIZE];
2108         wait_queue_head_t wait;
2109         spinlock_t lock;
2110 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2111         int     backlight_locker;
2112 #endif
2113 };
2114
2115 static LIST_HEAD(all_pmu_pvt);
2116 static DEFINE_SPINLOCK(all_pvt_lock);
2117
2118 static void
2119 pmu_pass_intr(unsigned char *data, int len)
2120 {
2121         struct pmu_private *pp;
2122         struct list_head *list;
2123         int i;
2124         unsigned long flags;
2125
2126         if (len > sizeof(pp->rb_buf[0].data))
2127                 len = sizeof(pp->rb_buf[0].data);
2128         spin_lock_irqsave(&all_pvt_lock, flags);
2129         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2130                 pp = list_entry(list, struct pmu_private, list);
2131                 spin_lock(&pp->lock);
2132                 i = pp->rb_put + 1;
2133                 if (i >= RB_SIZE)
2134                         i = 0;
2135                 if (i != pp->rb_get) {
2136                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2137                         rp->len = len;
2138                         memcpy(rp->data, data, len);
2139                         pp->rb_put = i;
2140                         wake_up_interruptible(&pp->wait);
2141                 }
2142                 spin_unlock(&pp->lock);
2143         }
2144         spin_unlock_irqrestore(&all_pvt_lock, flags);
2145 }
2146
2147 static int
2148 pmu_open(struct inode *inode, struct file *file)
2149 {
2150         struct pmu_private *pp;
2151         unsigned long flags;
2152
2153         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2154         if (!pp)
2155                 return -ENOMEM;
2156         pp->rb_get = pp->rb_put = 0;
2157         spin_lock_init(&pp->lock);
2158         init_waitqueue_head(&pp->wait);
2159         mutex_lock(&pmu_info_proc_mutex);
2160         spin_lock_irqsave(&all_pvt_lock, flags);
2161 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2162         pp->backlight_locker = 0;
2163 #endif
2164         list_add(&pp->list, &all_pmu_pvt);
2165         spin_unlock_irqrestore(&all_pvt_lock, flags);
2166         file->private_data = pp;
2167         mutex_unlock(&pmu_info_proc_mutex);
2168         return 0;
2169 }
2170
2171 static ssize_t
2172 pmu_read(struct file *file, char __user *buf,
2173                         size_t count, loff_t *ppos)
2174 {
2175         struct pmu_private *pp = file->private_data;
2176         DECLARE_WAITQUEUE(wait, current);
2177         unsigned long flags;
2178         int ret = 0;
2179
2180         if (count < 1 || !pp)
2181                 return -EINVAL;
2182
2183         spin_lock_irqsave(&pp->lock, flags);
2184         add_wait_queue(&pp->wait, &wait);
2185         set_current_state(TASK_INTERRUPTIBLE);
2186
2187         for (;;) {
2188                 ret = -EAGAIN;
2189                 if (pp->rb_get != pp->rb_put) {
2190                         int i = pp->rb_get;
2191                         struct rb_entry *rp = &pp->rb_buf[i];
2192                         ret = rp->len;
2193                         spin_unlock_irqrestore(&pp->lock, flags);
2194                         if (ret > count)
2195                                 ret = count;
2196                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2197                                 ret = -EFAULT;
2198                         if (++i >= RB_SIZE)
2199                                 i = 0;
2200                         spin_lock_irqsave(&pp->lock, flags);
2201                         pp->rb_get = i;
2202                 }
2203                 if (ret >= 0)
2204                         break;
2205                 if (file->f_flags & O_NONBLOCK)
2206                         break;
2207                 ret = -ERESTARTSYS;
2208                 if (signal_pending(current))
2209                         break;
2210                 spin_unlock_irqrestore(&pp->lock, flags);
2211                 schedule();
2212                 spin_lock_irqsave(&pp->lock, flags);
2213         }
2214         __set_current_state(TASK_RUNNING);
2215         remove_wait_queue(&pp->wait, &wait);
2216         spin_unlock_irqrestore(&pp->lock, flags);
2217
2218         return ret;
2219 }
2220
2221 static ssize_t
2222 pmu_write(struct file *file, const char __user *buf,
2223                          size_t count, loff_t *ppos)
2224 {
2225         return 0;
2226 }
2227
2228 static __poll_t
2229 pmu_fpoll(struct file *filp, poll_table *wait)
2230 {
2231         struct pmu_private *pp = filp->private_data;
2232         __poll_t mask = 0;
2233         unsigned long flags;
2234
2235         if (!pp)
2236                 return 0;
2237         poll_wait(filp, &pp->wait, wait);
2238         spin_lock_irqsave(&pp->lock, flags);
2239         if (pp->rb_get != pp->rb_put)
2240                 mask |= EPOLLIN;
2241         spin_unlock_irqrestore(&pp->lock, flags);
2242         return mask;
2243 }
2244
2245 static int
2246 pmu_release(struct inode *inode, struct file *file)
2247 {
2248         struct pmu_private *pp = file->private_data;
2249         unsigned long flags;
2250
2251         if (pp) {
2252                 file->private_data = NULL;
2253                 spin_lock_irqsave(&all_pvt_lock, flags);
2254                 list_del(&pp->list);
2255                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2256
2257 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2258                 if (pp->backlight_locker)
2259                         pmac_backlight_enable();
2260 #endif
2261
2262                 kfree(pp);
2263         }
2264         return 0;
2265 }
2266
2267 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2268 static void pmac_suspend_disable_irqs(void)
2269 {
2270         /* Call platform functions marked "on sleep" */
2271         pmac_pfunc_i2c_suspend();
2272         pmac_pfunc_base_suspend();
2273 }
2274
2275 static int powerbook_sleep(suspend_state_t state)
2276 {
2277         int error = 0;
2278
2279         /* Wait for completion of async requests */
2280         while (!batt_req.complete)
2281                 pmu_poll();
2282
2283         /* Giveup the lazy FPU & vec so we don't have to back them
2284          * up from the low level code
2285          */
2286         enable_kernel_fp();
2287
2288 #ifdef CONFIG_ALTIVEC
2289         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2290                 enable_kernel_altivec();
2291 #endif /* CONFIG_ALTIVEC */
2292
2293         switch (pmu_kind) {
2294         case PMU_OHARE_BASED:
2295                 error = powerbook_sleep_3400();
2296                 break;
2297         case PMU_HEATHROW_BASED:
2298         case PMU_PADDINGTON_BASED:
2299                 error = powerbook_sleep_grackle();
2300                 break;
2301         case PMU_KEYLARGO_BASED:
2302                 error = powerbook_sleep_Core99();
2303                 break;
2304         default:
2305                 return -ENOSYS;
2306         }
2307
2308         if (error)
2309                 return error;
2310
2311         mdelay(100);
2312
2313         return 0;
2314 }
2315
2316 static void pmac_suspend_enable_irqs(void)
2317 {
2318         /* Force a poll of ADB interrupts */
2319         adb_int_pending = 1;
2320         via_pmu_interrupt(0, NULL);
2321
2322         mdelay(10);
2323
2324         /* Call platform functions marked "on wake" */
2325         pmac_pfunc_base_resume();
2326         pmac_pfunc_i2c_resume();
2327 }
2328
2329 static int pmu_sleep_valid(suspend_state_t state)
2330 {
2331         return state == PM_SUSPEND_MEM
2332                 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2333 }
2334
2335 static const struct platform_suspend_ops pmu_pm_ops = {
2336         .enter = powerbook_sleep,
2337         .valid = pmu_sleep_valid,
2338 };
2339
2340 static int register_pmu_pm_ops(void)
2341 {
2342         if (pmu_kind == PMU_OHARE_BASED)
2343                 powerbook_sleep_init_3400();
2344         ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2345         ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2346         suspend_set_ops(&pmu_pm_ops);
2347
2348         return 0;
2349 }
2350
2351 device_initcall(register_pmu_pm_ops);
2352 #endif
2353
2354 static int pmu_ioctl(struct file *filp,
2355                      u_int cmd, u_long arg)
2356 {
2357         __u32 __user *argp = (__u32 __user *)arg;
2358         int error = -EINVAL;
2359
2360         switch (cmd) {
2361 #ifdef CONFIG_PPC_PMAC
2362         case PMU_IOC_SLEEP:
2363                 if (!capable(CAP_SYS_ADMIN))
2364                         return -EACCES;
2365                 return pm_suspend(PM_SUSPEND_MEM);
2366         case PMU_IOC_CAN_SLEEP:
2367                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2368                         return put_user(0, argp);
2369                 else
2370                         return put_user(1, argp);
2371 #endif
2372
2373 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2374         /* Compatibility ioctl's for backlight */
2375         case PMU_IOC_GET_BACKLIGHT:
2376         {
2377                 int brightness;
2378
2379                 brightness = pmac_backlight_get_legacy_brightness();
2380                 if (brightness < 0)
2381                         return brightness;
2382                 else
2383                         return put_user(brightness, argp);
2384
2385         }
2386         case PMU_IOC_SET_BACKLIGHT:
2387         {
2388                 int brightness;
2389
2390                 error = get_user(brightness, argp);
2391                 if (error)
2392                         return error;
2393
2394                 return pmac_backlight_set_legacy_brightness(brightness);
2395         }
2396 #ifdef CONFIG_INPUT_ADBHID
2397         case PMU_IOC_GRAB_BACKLIGHT: {
2398                 struct pmu_private *pp = filp->private_data;
2399
2400                 if (pp->backlight_locker)
2401                         return 0;
2402
2403                 pp->backlight_locker = 1;
2404                 pmac_backlight_disable();
2405
2406                 return 0;
2407         }
2408 #endif /* CONFIG_INPUT_ADBHID */
2409 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2410
2411         case PMU_IOC_GET_MODEL:
2412                 return put_user(pmu_kind, argp);
2413         case PMU_IOC_HAS_ADB:
2414                 return put_user(pmu_has_adb, argp);
2415         }
2416         return error;
2417 }
2418
2419 static long pmu_unlocked_ioctl(struct file *filp,
2420                                u_int cmd, u_long arg)
2421 {
2422         int ret;
2423
2424         mutex_lock(&pmu_info_proc_mutex);
2425         ret = pmu_ioctl(filp, cmd, arg);
2426         mutex_unlock(&pmu_info_proc_mutex);
2427
2428         return ret;
2429 }
2430
2431 #ifdef CONFIG_COMPAT
2432 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2433 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2434 #define PMU_IOC_GET_MODEL32     _IOR('B', 3, compat_size_t)
2435 #define PMU_IOC_HAS_ADB32       _IOR('B', 4, compat_size_t)
2436 #define PMU_IOC_CAN_SLEEP32     _IOR('B', 5, compat_size_t)
2437 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2438
2439 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2440 {
2441         switch (cmd) {
2442         case PMU_IOC_SLEEP:
2443                 break;
2444         case PMU_IOC_GET_BACKLIGHT32:
2445                 cmd = PMU_IOC_GET_BACKLIGHT;
2446                 break;
2447         case PMU_IOC_SET_BACKLIGHT32:
2448                 cmd = PMU_IOC_SET_BACKLIGHT;
2449                 break;
2450         case PMU_IOC_GET_MODEL32:
2451                 cmd = PMU_IOC_GET_MODEL;
2452                 break;
2453         case PMU_IOC_HAS_ADB32:
2454                 cmd = PMU_IOC_HAS_ADB;
2455                 break;
2456         case PMU_IOC_CAN_SLEEP32:
2457                 cmd = PMU_IOC_CAN_SLEEP;
2458                 break;
2459         case PMU_IOC_GRAB_BACKLIGHT32:
2460                 cmd = PMU_IOC_GRAB_BACKLIGHT;
2461                 break;
2462         default:
2463                 return -ENOIOCTLCMD;
2464         }
2465         return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2466 }
2467 #endif
2468
2469 static const struct file_operations pmu_device_fops = {
2470         .read           = pmu_read,
2471         .write          = pmu_write,
2472         .poll           = pmu_fpoll,
2473         .unlocked_ioctl = pmu_unlocked_ioctl,
2474 #ifdef CONFIG_COMPAT
2475         .compat_ioctl   = compat_pmu_ioctl,
2476 #endif
2477         .open           = pmu_open,
2478         .release        = pmu_release,
2479         .llseek         = noop_llseek,
2480 };
2481
2482 static struct miscdevice pmu_device = {
2483         PMU_MINOR, "pmu", &pmu_device_fops
2484 };
2485
2486 static int pmu_device_init(void)
2487 {
2488         if (pmu_state == uninitialized)
2489                 return 0;
2490         if (misc_register(&pmu_device) < 0)
2491                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2492         return 0;
2493 }
2494 device_initcall(pmu_device_init);
2495
2496
2497 #ifdef DEBUG_SLEEP
2498 static inline void
2499 polled_handshake(void)
2500 {
2501         via2[B] &= ~TREQ; eieio();
2502         while ((via2[B] & TACK) != 0)
2503                 ;
2504         via2[B] |= TREQ; eieio();
2505         while ((via2[B] & TACK) == 0)
2506                 ;
2507 }
2508
2509 static inline void
2510 polled_send_byte(int x)
2511 {
2512         via1[ACR] |= SR_OUT | SR_EXT; eieio();
2513         via1[SR] = x; eieio();
2514         polled_handshake();
2515 }
2516
2517 static inline int
2518 polled_recv_byte(void)
2519 {
2520         int x;
2521
2522         via1[ACR] = (via1[ACR] & ~SR_OUT) | SR_EXT; eieio();
2523         x = via1[SR]; eieio();
2524         polled_handshake();
2525         x = via1[SR]; eieio();
2526         return x;
2527 }
2528
2529 int
2530 pmu_polled_request(struct adb_request *req)
2531 {
2532         unsigned long flags;
2533         int i, l, c;
2534
2535         req->complete = 1;
2536         c = req->data[0];
2537         l = pmu_data_len[c][0];
2538         if (l >= 0 && req->nbytes != l + 1)
2539                 return -EINVAL;
2540
2541         local_irq_save(flags);
2542         while (pmu_state != idle)
2543                 pmu_poll();
2544
2545         while ((via2[B] & TACK) == 0)
2546                 ;
2547         polled_send_byte(c);
2548         if (l < 0) {
2549                 l = req->nbytes - 1;
2550                 polled_send_byte(l);
2551         }
2552         for (i = 1; i <= l; ++i)
2553                 polled_send_byte(req->data[i]);
2554
2555         l = pmu_data_len[c][1];
2556         if (l < 0)
2557                 l = polled_recv_byte();
2558         for (i = 0; i < l; ++i)
2559                 req->reply[i + req->reply_len] = polled_recv_byte();
2560
2561         if (req->done)
2562                 (*req->done)(req);
2563
2564         local_irq_restore(flags);
2565         return 0;
2566 }
2567
2568 /* N.B. This doesn't work on the 3400 */
2569 void pmu_blink(int n)
2570 {
2571         struct adb_request req;
2572
2573         memset(&req, 0, sizeof(req));
2574
2575         for (; n > 0; --n) {
2576                 req.nbytes = 4;
2577                 req.done = NULL;
2578                 req.data[0] = 0xee;
2579                 req.data[1] = 4;
2580                 req.data[2] = 0;
2581                 req.data[3] = 1;
2582                 req.reply[0] = ADB_RET_OK;
2583                 req.reply_len = 1;
2584                 req.reply_expected = 0;
2585                 pmu_polled_request(&req);
2586                 mdelay(50);
2587                 req.nbytes = 4;
2588                 req.done = NULL;
2589                 req.data[0] = 0xee;
2590                 req.data[1] = 4;
2591                 req.data[2] = 0;
2592                 req.data[3] = 0;
2593                 req.reply[0] = ADB_RET_OK;
2594                 req.reply_len = 1;
2595                 req.reply_expected = 0;
2596                 pmu_polled_request(&req);
2597                 mdelay(50);
2598         }
2599         mdelay(50);
2600 }
2601 #endif /* DEBUG_SLEEP */
2602
2603 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2604 int pmu_sys_suspended;
2605
2606 static int pmu_syscore_suspend(void)
2607 {
2608         /* Suspend PMU event interrupts */
2609         pmu_suspend();
2610         pmu_sys_suspended = 1;
2611
2612 #ifdef CONFIG_PMAC_BACKLIGHT
2613         /* Tell backlight code not to muck around with the chip anymore */
2614         pmu_backlight_set_sleep(1);
2615 #endif
2616
2617         return 0;
2618 }
2619
2620 static void pmu_syscore_resume(void)
2621 {
2622         struct adb_request req;
2623
2624         if (!pmu_sys_suspended)
2625                 return;
2626
2627         /* Tell PMU we are ready */
2628         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2629         pmu_wait_complete(&req);
2630
2631 #ifdef CONFIG_PMAC_BACKLIGHT
2632         /* Tell backlight code it can use the chip again */
2633         pmu_backlight_set_sleep(0);
2634 #endif
2635         /* Resume PMU event interrupts */
2636         pmu_resume();
2637         pmu_sys_suspended = 0;
2638 }
2639
2640 static struct syscore_ops pmu_syscore_ops = {
2641         .suspend = pmu_syscore_suspend,
2642         .resume = pmu_syscore_resume,
2643 };
2644
2645 static int pmu_syscore_register(void)
2646 {
2647         register_syscore_ops(&pmu_syscore_ops);
2648
2649         return 0;
2650 }
2651 subsys_initcall(pmu_syscore_register);
2652 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2653
2654 EXPORT_SYMBOL(pmu_request);
2655 EXPORT_SYMBOL(pmu_queue_request);
2656 EXPORT_SYMBOL(pmu_poll);
2657 EXPORT_SYMBOL(pmu_poll_adb);
2658 EXPORT_SYMBOL(pmu_wait_complete);
2659 EXPORT_SYMBOL(pmu_suspend);
2660 EXPORT_SYMBOL(pmu_resume);
2661 EXPORT_SYMBOL(pmu_unlock);
2662 #if defined(CONFIG_PPC32)
2663 EXPORT_SYMBOL(pmu_enable_irled);
2664 EXPORT_SYMBOL(pmu_battery_count);
2665 EXPORT_SYMBOL(pmu_batteries);
2666 EXPORT_SYMBOL(pmu_power_flags);
2667 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2668