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