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 <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 <asm/machdep.h> 54 #include <asm/io.h> 55 #include <asm/pgtable.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/prom.h> 63 #include <asm/mmu_context.h> 64 #include <asm/cputable.h> 65 #include <asm/time.h> 66 #include <asm/backlight.h> 67 #else 68 #include <asm/macintosh.h> 69 #include <asm/macints.h> 70 #include <asm/mac_via.h> 71 #endif 72 73 #include "via-pmu-event.h" 74 75 /* Some compile options */ 76 #undef DEBUG_SLEEP 77 78 /* Misc minor number allocated for /dev/pmu */ 79 #define PMU_MINOR 154 80 81 /* How many iterations between battery polls */ 82 #define BATTERY_POLLING_COUNT 2 83 84 static DEFINE_MUTEX(pmu_info_proc_mutex); 85 86 /* VIA registers - spaced 0x200 bytes apart */ 87 #define RS 0x200 /* skip between registers */ 88 #define B 0 /* B-side data */ 89 #define A RS /* A-side data */ 90 #define DIRB (2*RS) /* B-side direction (1=output) */ 91 #define DIRA (3*RS) /* A-side direction (1=output) */ 92 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */ 93 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */ 94 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */ 95 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */ 96 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */ 97 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */ 98 #define SR (10*RS) /* Shift register */ 99 #define ACR (11*RS) /* Auxiliary control register */ 100 #define PCR (12*RS) /* Peripheral control register */ 101 #define IFR (13*RS) /* Interrupt flag register */ 102 #define IER (14*RS) /* Interrupt enable register */ 103 #define ANH (15*RS) /* A-side data, no handshake */ 104 105 /* Bits in B data register: both active low */ 106 #ifdef CONFIG_PPC_PMAC 107 #define TACK 0x08 /* Transfer acknowledge (input) */ 108 #define TREQ 0x10 /* Transfer request (output) */ 109 #else 110 #define TACK 0x02 111 #define TREQ 0x04 112 #endif 113 114 /* Bits in ACR */ 115 #define SR_CTRL 0x1c /* Shift register control bits */ 116 #define SR_EXT 0x0c /* Shift on external clock */ 117 #define SR_OUT 0x10 /* Shift out if 1 */ 118 119 /* Bits in IFR and IER */ 120 #define IER_SET 0x80 /* set bits in IER */ 121 #define IER_CLR 0 /* clear bits in IER */ 122 #define SR_INT 0x04 /* Shift register full/empty */ 123 #define CB2_INT 0x08 124 #define CB1_INT 0x10 /* transition on CB1 input */ 125 126 static volatile enum pmu_state { 127 uninitialized = 0, 128 idle, 129 sending, 130 intack, 131 reading, 132 reading_intr, 133 locked, 134 } pmu_state; 135 136 static volatile enum int_data_state { 137 int_data_empty, 138 int_data_fill, 139 int_data_ready, 140 int_data_flush 141 } int_data_state[2] = { int_data_empty, int_data_empty }; 142 143 static struct adb_request *current_req; 144 static struct adb_request *last_req; 145 static struct adb_request *req_awaiting_reply; 146 static unsigned char interrupt_data[2][32]; 147 static int interrupt_data_len[2]; 148 static int int_data_last; 149 static unsigned char *reply_ptr; 150 static int data_index; 151 static int data_len; 152 static volatile int adb_int_pending; 153 static volatile int disable_poll; 154 static int pmu_kind = PMU_UNKNOWN; 155 static int pmu_fully_inited; 156 static int pmu_has_adb; 157 #ifdef CONFIG_PPC_PMAC 158 static volatile unsigned char __iomem *via1; 159 static volatile unsigned char __iomem *via2; 160 static struct device_node *vias; 161 static struct device_node *gpio_node; 162 #endif 163 static unsigned char __iomem *gpio_reg; 164 static int gpio_irq = 0; 165 static int gpio_irq_enabled = -1; 166 static volatile int pmu_suspended; 167 static spinlock_t pmu_lock; 168 static u8 pmu_intr_mask; 169 static int pmu_version; 170 static int drop_interrupts; 171 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 172 static int option_lid_wakeup = 1; 173 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 174 static unsigned long async_req_locks; 175 176 #define NUM_IRQ_STATS 13 177 static unsigned int pmu_irq_stats[NUM_IRQ_STATS]; 178 179 static struct proc_dir_entry *proc_pmu_root; 180 static struct proc_dir_entry *proc_pmu_info; 181 static struct proc_dir_entry *proc_pmu_irqstats; 182 static struct proc_dir_entry *proc_pmu_options; 183 static int option_server_mode; 184 185 int pmu_battery_count; 186 int pmu_cur_battery; 187 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT; 188 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES]; 189 static int query_batt_timer = BATTERY_POLLING_COUNT; 190 static struct adb_request batt_req; 191 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES]; 192 193 int __fake_sleep; 194 int asleep; 195 196 #ifdef CONFIG_ADB 197 static int adb_dev_map; 198 static int pmu_adb_flags; 199 200 static int pmu_probe(void); 201 static int pmu_init(void); 202 static int pmu_send_request(struct adb_request *req, int sync); 203 static int pmu_adb_autopoll(int devs); 204 static int pmu_adb_reset_bus(void); 205 #endif /* CONFIG_ADB */ 206 207 static int init_pmu(void); 208 static void pmu_start(void); 209 static irqreturn_t via_pmu_interrupt(int irq, void *arg); 210 static irqreturn_t gpio1_interrupt(int irq, void *arg); 211 static int pmu_info_proc_show(struct seq_file *m, void *v); 212 static int pmu_irqstats_proc_show(struct seq_file *m, void *v); 213 static int pmu_battery_proc_show(struct seq_file *m, void *v); 214 static void pmu_pass_intr(unsigned char *data, int len); 215 static const struct file_operations pmu_options_proc_fops; 216 217 #ifdef CONFIG_ADB 218 const struct adb_driver via_pmu_driver = { 219 .name = "PMU", 220 .probe = pmu_probe, 221 .init = pmu_init, 222 .send_request = pmu_send_request, 223 .autopoll = pmu_adb_autopoll, 224 .poll = pmu_poll_adb, 225 .reset_bus = pmu_adb_reset_bus, 226 }; 227 #endif /* CONFIG_ADB */ 228 229 extern void low_sleep_handler(void); 230 extern void enable_kernel_altivec(void); 231 extern void enable_kernel_fp(void); 232 233 #ifdef DEBUG_SLEEP 234 int pmu_polled_request(struct adb_request *req); 235 void pmu_blink(int n); 236 #endif 237 238 /* 239 * This table indicates for each PMU opcode: 240 * - the number of data bytes to be sent with the command, or -1 241 * if a length byte should be sent, 242 * - the number of response bytes which the PMU will return, or 243 * -1 if it will send a length byte. 244 */ 245 static const s8 pmu_data_len[256][2] = { 246 /* 0 1 2 3 4 5 6 7 */ 247 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 248 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 249 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 250 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0}, 251 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0}, 252 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1}, 253 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 254 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0}, 255 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 256 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1}, 257 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0}, 258 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1}, 259 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 260 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1}, 261 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 262 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1}, 263 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 264 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 265 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 266 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 267 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0}, 268 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 269 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 270 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 271 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 272 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 273 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 274 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1}, 275 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0}, 276 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0}, 277 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 278 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 279 }; 280 281 static char *pbook_type[] = { 282 "Unknown PowerBook", 283 "PowerBook 2400/3400/3500(G3)", 284 "PowerBook G3 Series", 285 "1999 PowerBook G3", 286 "Core99" 287 }; 288 289 int __init find_via_pmu(void) 290 { 291 #ifdef CONFIG_PPC_PMAC 292 u64 taddr; 293 const u32 *reg; 294 295 if (pmu_state != uninitialized) 296 return 1; 297 vias = of_find_node_by_name(NULL, "via-pmu"); 298 if (vias == NULL) 299 return 0; 300 301 reg = of_get_property(vias, "reg", NULL); 302 if (reg == NULL) { 303 printk(KERN_ERR "via-pmu: No \"reg\" property !\n"); 304 goto fail; 305 } 306 taddr = of_translate_address(vias, reg); 307 if (taddr == OF_BAD_ADDR) { 308 printk(KERN_ERR "via-pmu: Can't translate address !\n"); 309 goto fail; 310 } 311 312 spin_lock_init(&pmu_lock); 313 314 pmu_has_adb = 1; 315 316 pmu_intr_mask = PMU_INT_PCEJECT | 317 PMU_INT_SNDBRT | 318 PMU_INT_ADB | 319 PMU_INT_TICK; 320 321 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0) 322 || of_device_is_compatible(vias->parent, "ohare"))) 323 pmu_kind = PMU_OHARE_BASED; 324 else if (of_device_is_compatible(vias->parent, "paddington")) 325 pmu_kind = PMU_PADDINGTON_BASED; 326 else if (of_device_is_compatible(vias->parent, "heathrow")) 327 pmu_kind = PMU_HEATHROW_BASED; 328 else if (of_device_is_compatible(vias->parent, "Keylargo") 329 || of_device_is_compatible(vias->parent, "K2-Keylargo")) { 330 struct device_node *gpiop; 331 struct device_node *adbp; 332 u64 gaddr = OF_BAD_ADDR; 333 334 pmu_kind = PMU_KEYLARGO_BASED; 335 adbp = of_find_node_by_type(NULL, "adb"); 336 pmu_has_adb = (adbp != NULL); 337 of_node_put(adbp); 338 pmu_intr_mask = PMU_INT_PCEJECT | 339 PMU_INT_SNDBRT | 340 PMU_INT_ADB | 341 PMU_INT_TICK | 342 PMU_INT_ENVIRONMENT; 343 344 gpiop = of_find_node_by_name(NULL, "gpio"); 345 if (gpiop) { 346 reg = of_get_property(gpiop, "reg", NULL); 347 if (reg) 348 gaddr = of_translate_address(gpiop, reg); 349 if (gaddr != OF_BAD_ADDR) 350 gpio_reg = ioremap(gaddr, 0x10); 351 of_node_put(gpiop); 352 } 353 if (gpio_reg == NULL) { 354 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n"); 355 goto fail; 356 } 357 } else 358 pmu_kind = PMU_UNKNOWN; 359 360 via1 = via2 = ioremap(taddr, 0x2000); 361 if (via1 == NULL) { 362 printk(KERN_ERR "via-pmu: Can't map address !\n"); 363 goto fail_via_remap; 364 } 365 366 out_8(&via1[IER], IER_CLR | 0x7f); /* disable all intrs */ 367 out_8(&via1[IFR], 0x7f); /* clear IFR */ 368 369 pmu_state = idle; 370 371 if (!init_pmu()) 372 goto fail_init; 373 374 sys_ctrler = SYS_CTRLER_PMU; 375 376 return 1; 377 378 fail_init: 379 iounmap(via1); 380 via1 = via2 = NULL; 381 fail_via_remap: 382 iounmap(gpio_reg); 383 gpio_reg = NULL; 384 fail: 385 of_node_put(vias); 386 vias = NULL; 387 pmu_state = uninitialized; 388 return 0; 389 #else 390 if (macintosh_config->adb_type != MAC_ADB_PB2) 391 return 0; 392 393 pmu_kind = PMU_UNKNOWN; 394 395 spin_lock_init(&pmu_lock); 396 397 pmu_has_adb = 1; 398 399 pmu_intr_mask = PMU_INT_PCEJECT | 400 PMU_INT_SNDBRT | 401 PMU_INT_ADB | 402 PMU_INT_TICK; 403 404 pmu_state = idle; 405 406 if (!init_pmu()) { 407 pmu_state = uninitialized; 408 return 0; 409 } 410 411 return 1; 412 #endif /* !CONFIG_PPC_PMAC */ 413 } 414 415 #ifdef CONFIG_ADB 416 static int pmu_probe(void) 417 { 418 return pmu_state == uninitialized ? -ENODEV : 0; 419 } 420 421 static int pmu_init(void) 422 { 423 return pmu_state == uninitialized ? -ENODEV : 0; 424 } 425 #endif /* CONFIG_ADB */ 426 427 /* 428 * We can't wait until pmu_init gets called, that happens too late. 429 * It happens after IDE and SCSI initialization, which can take a few 430 * seconds, and by that time the PMU could have given up on us and 431 * turned us off. 432 * Thus this is called with arch_initcall rather than device_initcall. 433 */ 434 static int __init via_pmu_start(void) 435 { 436 unsigned int __maybe_unused irq; 437 438 if (pmu_state == uninitialized) 439 return -ENODEV; 440 441 batt_req.complete = 1; 442 443 #ifdef CONFIG_PPC_PMAC 444 irq = irq_of_parse_and_map(vias, 0); 445 if (!irq) { 446 printk(KERN_ERR "via-pmu: can't map interrupt\n"); 447 return -ENODEV; 448 } 449 /* We set IRQF_NO_SUSPEND because we don't want the interrupt 450 * to be disabled between the 2 passes of driver suspend, we 451 * control our own disabling for that one 452 */ 453 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND, 454 "VIA-PMU", (void *)0)) { 455 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq); 456 return -ENODEV; 457 } 458 459 if (pmu_kind == PMU_KEYLARGO_BASED) { 460 gpio_node = of_find_node_by_name(NULL, "extint-gpio1"); 461 if (gpio_node == NULL) 462 gpio_node = of_find_node_by_name(NULL, 463 "pmu-interrupt"); 464 if (gpio_node) 465 gpio_irq = irq_of_parse_and_map(gpio_node, 0); 466 467 if (gpio_irq) { 468 if (request_irq(gpio_irq, gpio1_interrupt, 469 IRQF_NO_SUSPEND, "GPIO1 ADB", 470 (void *)0)) 471 printk(KERN_ERR "pmu: can't get irq %d" 472 " (GPIO1)\n", gpio_irq); 473 else 474 gpio_irq_enabled = 1; 475 } 476 } 477 478 /* Enable interrupts */ 479 out_8(&via1[IER], IER_SET | SR_INT | CB1_INT); 480 #else 481 if (request_irq(IRQ_MAC_ADB_SR, via_pmu_interrupt, IRQF_NO_SUSPEND, 482 "VIA-PMU-SR", NULL)) { 483 pr_err("%s: couldn't get SR irq\n", __func__); 484 return -ENODEV; 485 } 486 if (request_irq(IRQ_MAC_ADB_CL, via_pmu_interrupt, IRQF_NO_SUSPEND, 487 "VIA-PMU-CL", NULL)) { 488 pr_err("%s: couldn't get CL irq\n", __func__); 489 free_irq(IRQ_MAC_ADB_SR, NULL); 490 return -ENODEV; 491 } 492 #endif /* !CONFIG_PPC_PMAC */ 493 494 pmu_fully_inited = 1; 495 496 /* Make sure PMU settle down before continuing. This is _very_ important 497 * since the IDE probe may shut interrupts down for quite a bit of time. If 498 * a PMU communication is pending while this happens, the PMU may timeout 499 * Not that on Core99 machines, the PMU keeps sending us environement 500 * messages, we should find a way to either fix IDE or make it call 501 * pmu_suspend() before masking interrupts. This can also happens while 502 * scolling with some fbdevs. 503 */ 504 do { 505 pmu_poll(); 506 } while (pmu_state != idle); 507 508 return 0; 509 } 510 511 arch_initcall(via_pmu_start); 512 513 /* 514 * This has to be done after pci_init, which is a subsys_initcall. 515 */ 516 static int __init via_pmu_dev_init(void) 517 { 518 if (pmu_state == uninitialized) 519 return -ENODEV; 520 521 #ifdef CONFIG_PMAC_BACKLIGHT 522 /* Initialize backlight */ 523 pmu_backlight_init(); 524 #endif 525 526 #ifdef CONFIG_PPC32 527 if (of_machine_is_compatible("AAPL,3400/2400") || 528 of_machine_is_compatible("AAPL,3500")) { 529 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 530 NULL, PMAC_MB_INFO_MODEL, 0); 531 pmu_battery_count = 1; 532 if (mb == PMAC_TYPE_COMET) 533 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET; 534 else 535 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER; 536 } else if (of_machine_is_compatible("AAPL,PowerBook1998") || 537 of_machine_is_compatible("PowerBook1,1")) { 538 pmu_battery_count = 2; 539 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 540 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 541 } else { 542 struct device_node* prim = 543 of_find_node_by_name(NULL, "power-mgt"); 544 const u32 *prim_info = NULL; 545 if (prim) 546 prim_info = of_get_property(prim, "prim-info", NULL); 547 if (prim_info) { 548 /* Other stuffs here yet unknown */ 549 pmu_battery_count = (prim_info[6] >> 16) & 0xff; 550 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 551 if (pmu_battery_count > 1) 552 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 553 } 554 of_node_put(prim); 555 } 556 #endif /* CONFIG_PPC32 */ 557 558 /* Create /proc/pmu */ 559 proc_pmu_root = proc_mkdir("pmu", NULL); 560 if (proc_pmu_root) { 561 long i; 562 563 for (i=0; i<pmu_battery_count; i++) { 564 char title[16]; 565 sprintf(title, "battery_%ld", i); 566 proc_pmu_batt[i] = proc_create_single_data(title, 0, 567 proc_pmu_root, pmu_battery_proc_show, 568 (void *)i); 569 } 570 571 proc_pmu_info = proc_create_single("info", 0, proc_pmu_root, 572 pmu_info_proc_show); 573 proc_pmu_irqstats = proc_create_single("interrupts", 0, 574 proc_pmu_root, pmu_irqstats_proc_show); 575 proc_pmu_options = proc_create("options", 0600, proc_pmu_root, 576 &pmu_options_proc_fops); 577 } 578 return 0; 579 } 580 581 device_initcall(via_pmu_dev_init); 582 583 static int 584 init_pmu(void) 585 { 586 int timeout; 587 struct adb_request req; 588 589 /* Negate TREQ. Set TACK to input and TREQ to output. */ 590 out_8(&via2[B], in_8(&via2[B]) | TREQ); 591 out_8(&via2[DIRB], (in_8(&via2[DIRB]) | TREQ) & ~TACK); 592 593 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 594 timeout = 100000; 595 while (!req.complete) { 596 if (--timeout < 0) { 597 printk(KERN_ERR "init_pmu: no response from PMU\n"); 598 return 0; 599 } 600 udelay(10); 601 pmu_poll(); 602 } 603 604 /* ack all pending interrupts */ 605 timeout = 100000; 606 interrupt_data[0][0] = 1; 607 while (interrupt_data[0][0] || pmu_state != idle) { 608 if (--timeout < 0) { 609 printk(KERN_ERR "init_pmu: timed out acking intrs\n"); 610 return 0; 611 } 612 if (pmu_state == idle) 613 adb_int_pending = 1; 614 via_pmu_interrupt(0, NULL); 615 udelay(10); 616 } 617 618 /* Tell PMU we are ready. */ 619 if (pmu_kind == PMU_KEYLARGO_BASED) { 620 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 621 while (!req.complete) 622 pmu_poll(); 623 } 624 625 /* Read PMU version */ 626 pmu_request(&req, NULL, 1, PMU_GET_VERSION); 627 pmu_wait_complete(&req); 628 if (req.reply_len > 0) 629 pmu_version = req.reply[0]; 630 631 /* Read server mode setting */ 632 if (pmu_kind == PMU_KEYLARGO_BASED) { 633 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, 634 PMU_PWR_GET_POWERUP_EVENTS); 635 pmu_wait_complete(&req); 636 if (req.reply_len == 2) { 637 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT) 638 option_server_mode = 1; 639 printk(KERN_INFO "via-pmu: Server Mode is %s\n", 640 option_server_mode ? "enabled" : "disabled"); 641 } 642 } 643 644 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n", 645 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version); 646 647 return 1; 648 } 649 650 int 651 pmu_get_model(void) 652 { 653 return pmu_kind; 654 } 655 656 static void pmu_set_server_mode(int server_mode) 657 { 658 struct adb_request req; 659 660 if (pmu_kind != PMU_KEYLARGO_BASED) 661 return; 662 663 option_server_mode = server_mode; 664 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS); 665 pmu_wait_complete(&req); 666 if (req.reply_len < 2) 667 return; 668 if (server_mode) 669 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 670 PMU_PWR_SET_POWERUP_EVENTS, 671 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 672 else 673 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 674 PMU_PWR_CLR_POWERUP_EVENTS, 675 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 676 pmu_wait_complete(&req); 677 } 678 679 /* This new version of the code for 2400/3400/3500 powerbooks 680 * is inspired from the implementation in gkrellm-pmu 681 */ 682 static void 683 done_battery_state_ohare(struct adb_request* req) 684 { 685 #ifdef CONFIG_PPC_PMAC 686 /* format: 687 * [0] : flags 688 * 0x01 : AC indicator 689 * 0x02 : charging 690 * 0x04 : battery exist 691 * 0x08 : 692 * 0x10 : 693 * 0x20 : full charged 694 * 0x40 : pcharge reset 695 * 0x80 : battery exist 696 * 697 * [1][2] : battery voltage 698 * [3] : CPU temperature 699 * [4] : battery temperature 700 * [5] : current 701 * [6][7] : pcharge 702 * --tkoba 703 */ 704 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER; 705 long pcharge, charge, vb, vmax, lmax; 706 long vmax_charging, vmax_charged; 707 long amperage, voltage, time, max; 708 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 709 NULL, PMAC_MB_INFO_MODEL, 0); 710 711 if (req->reply[0] & 0x01) 712 pmu_power_flags |= PMU_PWR_AC_PRESENT; 713 else 714 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 715 716 if (mb == PMAC_TYPE_COMET) { 717 vmax_charged = 189; 718 vmax_charging = 213; 719 lmax = 6500; 720 } else { 721 vmax_charged = 330; 722 vmax_charging = 330; 723 lmax = 6500; 724 } 725 vmax = vmax_charged; 726 727 /* If battery installed */ 728 if (req->reply[0] & 0x04) { 729 bat_flags |= PMU_BATT_PRESENT; 730 if (req->reply[0] & 0x02) 731 bat_flags |= PMU_BATT_CHARGING; 732 vb = (req->reply[1] << 8) | req->reply[2]; 733 voltage = (vb * 265 + 72665) / 10; 734 amperage = req->reply[5]; 735 if ((req->reply[0] & 0x01) == 0) { 736 if (amperage > 200) 737 vb += ((amperage - 200) * 15)/100; 738 } else if (req->reply[0] & 0x02) { 739 vb = (vb * 97) / 100; 740 vmax = vmax_charging; 741 } 742 charge = (100 * vb) / vmax; 743 if (req->reply[0] & 0x40) { 744 pcharge = (req->reply[6] << 8) + req->reply[7]; 745 if (pcharge > lmax) 746 pcharge = lmax; 747 pcharge *= 100; 748 pcharge = 100 - pcharge / lmax; 749 if (pcharge < charge) 750 charge = pcharge; 751 } 752 if (amperage > 0) 753 time = (charge * 16440) / amperage; 754 else 755 time = 0; 756 max = 100; 757 amperage = -amperage; 758 } else 759 charge = max = amperage = voltage = time = 0; 760 761 pmu_batteries[pmu_cur_battery].flags = bat_flags; 762 pmu_batteries[pmu_cur_battery].charge = charge; 763 pmu_batteries[pmu_cur_battery].max_charge = max; 764 pmu_batteries[pmu_cur_battery].amperage = amperage; 765 pmu_batteries[pmu_cur_battery].voltage = voltage; 766 pmu_batteries[pmu_cur_battery].time_remaining = time; 767 #endif /* CONFIG_PPC_PMAC */ 768 769 clear_bit(0, &async_req_locks); 770 } 771 772 static void 773 done_battery_state_smart(struct adb_request* req) 774 { 775 /* format: 776 * [0] : format of this structure (known: 3,4,5) 777 * [1] : flags 778 * 779 * format 3 & 4: 780 * 781 * [2] : charge 782 * [3] : max charge 783 * [4] : current 784 * [5] : voltage 785 * 786 * format 5: 787 * 788 * [2][3] : charge 789 * [4][5] : max charge 790 * [6][7] : current 791 * [8][9] : voltage 792 */ 793 794 unsigned int bat_flags = PMU_BATT_TYPE_SMART; 795 int amperage; 796 unsigned int capa, max, voltage; 797 798 if (req->reply[1] & 0x01) 799 pmu_power_flags |= PMU_PWR_AC_PRESENT; 800 else 801 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 802 803 804 capa = max = amperage = voltage = 0; 805 806 if (req->reply[1] & 0x04) { 807 bat_flags |= PMU_BATT_PRESENT; 808 switch(req->reply[0]) { 809 case 3: 810 case 4: capa = req->reply[2]; 811 max = req->reply[3]; 812 amperage = *((signed char *)&req->reply[4]); 813 voltage = req->reply[5]; 814 break; 815 case 5: capa = (req->reply[2] << 8) | req->reply[3]; 816 max = (req->reply[4] << 8) | req->reply[5]; 817 amperage = *((signed short *)&req->reply[6]); 818 voltage = (req->reply[8] << 8) | req->reply[9]; 819 break; 820 default: 821 pr_warn("pmu.c: unrecognized battery info, " 822 "len: %d, %4ph\n", req->reply_len, 823 req->reply); 824 break; 825 } 826 } 827 828 if ((req->reply[1] & 0x01) && (amperage > 0)) 829 bat_flags |= PMU_BATT_CHARGING; 830 831 pmu_batteries[pmu_cur_battery].flags = bat_flags; 832 pmu_batteries[pmu_cur_battery].charge = capa; 833 pmu_batteries[pmu_cur_battery].max_charge = max; 834 pmu_batteries[pmu_cur_battery].amperage = amperage; 835 pmu_batteries[pmu_cur_battery].voltage = voltage; 836 if (amperage) { 837 if ((req->reply[1] & 0x01) && (amperage > 0)) 838 pmu_batteries[pmu_cur_battery].time_remaining 839 = ((max-capa) * 3600) / amperage; 840 else 841 pmu_batteries[pmu_cur_battery].time_remaining 842 = (capa * 3600) / (-amperage); 843 } else 844 pmu_batteries[pmu_cur_battery].time_remaining = 0; 845 846 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count; 847 848 clear_bit(0, &async_req_locks); 849 } 850 851 static void 852 query_battery_state(void) 853 { 854 if (test_and_set_bit(0, &async_req_locks)) 855 return; 856 if (pmu_kind == PMU_OHARE_BASED) 857 pmu_request(&batt_req, done_battery_state_ohare, 858 1, PMU_BATTERY_STATE); 859 else 860 pmu_request(&batt_req, done_battery_state_smart, 861 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1); 862 } 863 864 static int pmu_info_proc_show(struct seq_file *m, void *v) 865 { 866 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION); 867 seq_printf(m, "PMU firmware version : %02x\n", pmu_version); 868 seq_printf(m, "AC Power : %d\n", 869 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0); 870 seq_printf(m, "Battery count : %d\n", pmu_battery_count); 871 872 return 0; 873 } 874 875 static int pmu_irqstats_proc_show(struct seq_file *m, void *v) 876 { 877 int i; 878 static const char *irq_names[NUM_IRQ_STATS] = { 879 "Unknown interrupt (type 0)", 880 "Unknown interrupt (type 1)", 881 "PC-Card eject button", 882 "Sound/Brightness button", 883 "ADB message", 884 "Battery state change", 885 "Environment interrupt", 886 "Tick timer", 887 "Ghost interrupt (zero len)", 888 "Empty interrupt (empty mask)", 889 "Max irqs in a row", 890 "Total CB1 triggered events", 891 "Total GPIO1 triggered events", 892 }; 893 894 for (i = 0; i < NUM_IRQ_STATS; i++) { 895 seq_printf(m, " %2u: %10u (%s)\n", 896 i, pmu_irq_stats[i], irq_names[i]); 897 } 898 return 0; 899 } 900 901 static int pmu_battery_proc_show(struct seq_file *m, void *v) 902 { 903 long batnum = (long)m->private; 904 905 seq_putc(m, '\n'); 906 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags); 907 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge); 908 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge); 909 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage); 910 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage); 911 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining); 912 return 0; 913 } 914 915 static int pmu_options_proc_show(struct seq_file *m, void *v) 916 { 917 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 918 if (pmu_kind == PMU_KEYLARGO_BASED && 919 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 920 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup); 921 #endif 922 if (pmu_kind == PMU_KEYLARGO_BASED) 923 seq_printf(m, "server_mode=%d\n", option_server_mode); 924 925 return 0; 926 } 927 928 static int pmu_options_proc_open(struct inode *inode, struct file *file) 929 { 930 return single_open(file, pmu_options_proc_show, NULL); 931 } 932 933 static ssize_t pmu_options_proc_write(struct file *file, 934 const char __user *buffer, size_t count, loff_t *pos) 935 { 936 char tmp[33]; 937 char *label, *val; 938 size_t fcount = count; 939 940 if (!count) 941 return -EINVAL; 942 if (count > 32) 943 count = 32; 944 if (copy_from_user(tmp, buffer, count)) 945 return -EFAULT; 946 tmp[count] = 0; 947 948 label = tmp; 949 while(*label == ' ') 950 label++; 951 val = label; 952 while(*val && (*val != '=')) { 953 if (*val == ' ') 954 *val = 0; 955 val++; 956 } 957 if ((*val) == 0) 958 return -EINVAL; 959 *(val++) = 0; 960 while(*val == ' ') 961 val++; 962 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 963 if (pmu_kind == PMU_KEYLARGO_BASED && 964 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 965 if (!strcmp(label, "lid_wakeup")) 966 option_lid_wakeup = ((*val) == '1'); 967 #endif 968 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) { 969 int new_value; 970 new_value = ((*val) == '1'); 971 if (new_value != option_server_mode) 972 pmu_set_server_mode(new_value); 973 } 974 return fcount; 975 } 976 977 static const struct file_operations pmu_options_proc_fops = { 978 .owner = THIS_MODULE, 979 .open = pmu_options_proc_open, 980 .read = seq_read, 981 .llseek = seq_lseek, 982 .release = single_release, 983 .write = pmu_options_proc_write, 984 }; 985 986 #ifdef CONFIG_ADB 987 /* Send an ADB command */ 988 static int pmu_send_request(struct adb_request *req, int sync) 989 { 990 int i, ret; 991 992 if (pmu_state == uninitialized || !pmu_fully_inited) { 993 req->complete = 1; 994 return -ENXIO; 995 } 996 997 ret = -EINVAL; 998 999 switch (req->data[0]) { 1000 case PMU_PACKET: 1001 for (i = 0; i < req->nbytes - 1; ++i) 1002 req->data[i] = req->data[i+1]; 1003 --req->nbytes; 1004 if (pmu_data_len[req->data[0]][1] != 0) { 1005 req->reply[0] = ADB_RET_OK; 1006 req->reply_len = 1; 1007 } else 1008 req->reply_len = 0; 1009 ret = pmu_queue_request(req); 1010 break; 1011 case CUDA_PACKET: 1012 switch (req->data[1]) { 1013 case CUDA_GET_TIME: 1014 if (req->nbytes != 2) 1015 break; 1016 req->data[0] = PMU_READ_RTC; 1017 req->nbytes = 1; 1018 req->reply_len = 3; 1019 req->reply[0] = CUDA_PACKET; 1020 req->reply[1] = 0; 1021 req->reply[2] = CUDA_GET_TIME; 1022 ret = pmu_queue_request(req); 1023 break; 1024 case CUDA_SET_TIME: 1025 if (req->nbytes != 6) 1026 break; 1027 req->data[0] = PMU_SET_RTC; 1028 req->nbytes = 5; 1029 for (i = 1; i <= 4; ++i) 1030 req->data[i] = req->data[i+1]; 1031 req->reply_len = 3; 1032 req->reply[0] = CUDA_PACKET; 1033 req->reply[1] = 0; 1034 req->reply[2] = CUDA_SET_TIME; 1035 ret = pmu_queue_request(req); 1036 break; 1037 } 1038 break; 1039 case ADB_PACKET: 1040 if (!pmu_has_adb) 1041 return -ENXIO; 1042 for (i = req->nbytes - 1; i > 1; --i) 1043 req->data[i+2] = req->data[i]; 1044 req->data[3] = req->nbytes - 2; 1045 req->data[2] = pmu_adb_flags; 1046 /*req->data[1] = req->data[1];*/ 1047 req->data[0] = PMU_ADB_CMD; 1048 req->nbytes += 2; 1049 req->reply_expected = 1; 1050 req->reply_len = 0; 1051 ret = pmu_queue_request(req); 1052 break; 1053 } 1054 if (ret) { 1055 req->complete = 1; 1056 return ret; 1057 } 1058 1059 if (sync) 1060 while (!req->complete) 1061 pmu_poll(); 1062 1063 return 0; 1064 } 1065 1066 /* Enable/disable autopolling */ 1067 static int __pmu_adb_autopoll(int devs) 1068 { 1069 struct adb_request req; 1070 1071 if (devs) { 1072 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86, 1073 adb_dev_map >> 8, adb_dev_map); 1074 pmu_adb_flags = 2; 1075 } else { 1076 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF); 1077 pmu_adb_flags = 0; 1078 } 1079 while (!req.complete) 1080 pmu_poll(); 1081 return 0; 1082 } 1083 1084 static int pmu_adb_autopoll(int devs) 1085 { 1086 if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb) 1087 return -ENXIO; 1088 1089 adb_dev_map = devs; 1090 return __pmu_adb_autopoll(devs); 1091 } 1092 1093 /* Reset the ADB bus */ 1094 static int pmu_adb_reset_bus(void) 1095 { 1096 struct adb_request req; 1097 int save_autopoll = adb_dev_map; 1098 1099 if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb) 1100 return -ENXIO; 1101 1102 /* anyone got a better idea?? */ 1103 __pmu_adb_autopoll(0); 1104 1105 req.nbytes = 4; 1106 req.done = NULL; 1107 req.data[0] = PMU_ADB_CMD; 1108 req.data[1] = ADB_BUSRESET; 1109 req.data[2] = 0; 1110 req.data[3] = 0; 1111 req.data[4] = 0; 1112 req.reply_len = 0; 1113 req.reply_expected = 1; 1114 if (pmu_queue_request(&req) != 0) { 1115 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n"); 1116 return -EIO; 1117 } 1118 pmu_wait_complete(&req); 1119 1120 if (save_autopoll != 0) 1121 __pmu_adb_autopoll(save_autopoll); 1122 1123 return 0; 1124 } 1125 #endif /* CONFIG_ADB */ 1126 1127 /* Construct and send a pmu request */ 1128 int 1129 pmu_request(struct adb_request *req, void (*done)(struct adb_request *), 1130 int nbytes, ...) 1131 { 1132 va_list list; 1133 int i; 1134 1135 if (pmu_state == uninitialized) 1136 return -ENXIO; 1137 1138 if (nbytes < 0 || nbytes > 32) { 1139 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes); 1140 req->complete = 1; 1141 return -EINVAL; 1142 } 1143 req->nbytes = nbytes; 1144 req->done = done; 1145 va_start(list, nbytes); 1146 for (i = 0; i < nbytes; ++i) 1147 req->data[i] = va_arg(list, int); 1148 va_end(list); 1149 req->reply_len = 0; 1150 req->reply_expected = 0; 1151 return pmu_queue_request(req); 1152 } 1153 1154 int 1155 pmu_queue_request(struct adb_request *req) 1156 { 1157 unsigned long flags; 1158 int nsend; 1159 1160 if (pmu_state == uninitialized) { 1161 req->complete = 1; 1162 return -ENXIO; 1163 } 1164 if (req->nbytes <= 0) { 1165 req->complete = 1; 1166 return 0; 1167 } 1168 nsend = pmu_data_len[req->data[0]][0]; 1169 if (nsend >= 0 && req->nbytes != nsend + 1) { 1170 req->complete = 1; 1171 return -EINVAL; 1172 } 1173 1174 req->next = NULL; 1175 req->sent = 0; 1176 req->complete = 0; 1177 1178 spin_lock_irqsave(&pmu_lock, flags); 1179 if (current_req) { 1180 last_req->next = req; 1181 last_req = req; 1182 } else { 1183 current_req = req; 1184 last_req = req; 1185 if (pmu_state == idle) 1186 pmu_start(); 1187 } 1188 spin_unlock_irqrestore(&pmu_lock, flags); 1189 1190 return 0; 1191 } 1192 1193 static inline void 1194 wait_for_ack(void) 1195 { 1196 /* Sightly increased the delay, I had one occurrence of the message 1197 * reported 1198 */ 1199 int timeout = 4000; 1200 while ((in_8(&via2[B]) & TACK) == 0) { 1201 if (--timeout < 0) { 1202 printk(KERN_ERR "PMU not responding (!ack)\n"); 1203 return; 1204 } 1205 udelay(10); 1206 } 1207 } 1208 1209 /* New PMU seems to be very sensitive to those timings, so we make sure 1210 * PCI is flushed immediately */ 1211 static inline void 1212 send_byte(int x) 1213 { 1214 out_8(&via1[ACR], in_8(&via1[ACR]) | SR_OUT | SR_EXT); 1215 out_8(&via1[SR], x); 1216 out_8(&via2[B], in_8(&via2[B]) & ~TREQ); /* assert TREQ */ 1217 (void)in_8(&via2[B]); 1218 } 1219 1220 static inline void 1221 recv_byte(void) 1222 { 1223 out_8(&via1[ACR], (in_8(&via1[ACR]) & ~SR_OUT) | SR_EXT); 1224 in_8(&via1[SR]); /* resets SR */ 1225 out_8(&via2[B], in_8(&via2[B]) & ~TREQ); 1226 (void)in_8(&via2[B]); 1227 } 1228 1229 static inline void 1230 pmu_done(struct adb_request *req) 1231 { 1232 void (*done)(struct adb_request *) = req->done; 1233 mb(); 1234 req->complete = 1; 1235 /* Here, we assume that if the request has a done member, the 1236 * struct request will survive to setting req->complete to 1 1237 */ 1238 if (done) 1239 (*done)(req); 1240 } 1241 1242 static void 1243 pmu_start(void) 1244 { 1245 struct adb_request *req; 1246 1247 /* assert pmu_state == idle */ 1248 /* get the packet to send */ 1249 req = current_req; 1250 if (!req || pmu_state != idle 1251 || (/*req->reply_expected && */req_awaiting_reply)) 1252 return; 1253 1254 pmu_state = sending; 1255 data_index = 1; 1256 data_len = pmu_data_len[req->data[0]][0]; 1257 1258 /* Sounds safer to make sure ACK is high before writing. This helped 1259 * kill a problem with ADB and some iBooks 1260 */ 1261 wait_for_ack(); 1262 /* set the shift register to shift out and send a byte */ 1263 send_byte(req->data[0]); 1264 } 1265 1266 void 1267 pmu_poll(void) 1268 { 1269 if (pmu_state == uninitialized) 1270 return; 1271 if (disable_poll) 1272 return; 1273 via_pmu_interrupt(0, NULL); 1274 } 1275 1276 void 1277 pmu_poll_adb(void) 1278 { 1279 if (pmu_state == uninitialized) 1280 return; 1281 if (disable_poll) 1282 return; 1283 /* Kicks ADB read when PMU is suspended */ 1284 adb_int_pending = 1; 1285 do { 1286 via_pmu_interrupt(0, NULL); 1287 } while (pmu_suspended && (adb_int_pending || pmu_state != idle 1288 || req_awaiting_reply)); 1289 } 1290 1291 void 1292 pmu_wait_complete(struct adb_request *req) 1293 { 1294 if (pmu_state == uninitialized) 1295 return; 1296 while((pmu_state != idle && pmu_state != locked) || !req->complete) 1297 via_pmu_interrupt(0, NULL); 1298 } 1299 1300 /* This function loops until the PMU is idle and prevents it from 1301 * anwsering to ADB interrupts. pmu_request can still be called. 1302 * This is done to avoid spurrious shutdowns when we know we'll have 1303 * interrupts switched off for a long time 1304 */ 1305 void 1306 pmu_suspend(void) 1307 { 1308 unsigned long flags; 1309 1310 if (pmu_state == uninitialized) 1311 return; 1312 1313 spin_lock_irqsave(&pmu_lock, flags); 1314 pmu_suspended++; 1315 if (pmu_suspended > 1) { 1316 spin_unlock_irqrestore(&pmu_lock, flags); 1317 return; 1318 } 1319 1320 do { 1321 spin_unlock_irqrestore(&pmu_lock, flags); 1322 if (req_awaiting_reply) 1323 adb_int_pending = 1; 1324 via_pmu_interrupt(0, NULL); 1325 spin_lock_irqsave(&pmu_lock, flags); 1326 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) { 1327 if (gpio_irq >= 0) 1328 disable_irq_nosync(gpio_irq); 1329 out_8(&via1[IER], CB1_INT | IER_CLR); 1330 spin_unlock_irqrestore(&pmu_lock, flags); 1331 break; 1332 } 1333 } while (1); 1334 } 1335 1336 void 1337 pmu_resume(void) 1338 { 1339 unsigned long flags; 1340 1341 if (pmu_state == uninitialized || pmu_suspended < 1) 1342 return; 1343 1344 spin_lock_irqsave(&pmu_lock, flags); 1345 pmu_suspended--; 1346 if (pmu_suspended > 0) { 1347 spin_unlock_irqrestore(&pmu_lock, flags); 1348 return; 1349 } 1350 adb_int_pending = 1; 1351 if (gpio_irq >= 0) 1352 enable_irq(gpio_irq); 1353 out_8(&via1[IER], CB1_INT | IER_SET); 1354 spin_unlock_irqrestore(&pmu_lock, flags); 1355 pmu_poll(); 1356 } 1357 1358 /* Interrupt data could be the result data from an ADB cmd */ 1359 static void 1360 pmu_handle_data(unsigned char *data, int len) 1361 { 1362 unsigned char ints; 1363 int idx; 1364 int i = 0; 1365 1366 asleep = 0; 1367 if (drop_interrupts || len < 1) { 1368 adb_int_pending = 0; 1369 pmu_irq_stats[8]++; 1370 return; 1371 } 1372 1373 /* Get PMU interrupt mask */ 1374 ints = data[0]; 1375 1376 /* Record zero interrupts for stats */ 1377 if (ints == 0) 1378 pmu_irq_stats[9]++; 1379 1380 /* Hack to deal with ADB autopoll flag */ 1381 if (ints & PMU_INT_ADB) 1382 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL); 1383 1384 next: 1385 if (ints == 0) { 1386 if (i > pmu_irq_stats[10]) 1387 pmu_irq_stats[10] = i; 1388 return; 1389 } 1390 i++; 1391 1392 idx = ffs(ints) - 1; 1393 ints &= ~BIT(idx); 1394 1395 pmu_irq_stats[idx]++; 1396 1397 /* Note: for some reason, we get an interrupt with len=1, 1398 * data[0]==0 after each normal ADB interrupt, at least 1399 * on the Pismo. Still investigating... --BenH 1400 */ 1401 switch (BIT(idx)) { 1402 case PMU_INT_ADB: 1403 if ((data[0] & PMU_INT_ADB_AUTO) == 0) { 1404 struct adb_request *req = req_awaiting_reply; 1405 if (!req) { 1406 printk(KERN_ERR "PMU: extra ADB reply\n"); 1407 return; 1408 } 1409 req_awaiting_reply = NULL; 1410 if (len <= 2) 1411 req->reply_len = 0; 1412 else { 1413 memcpy(req->reply, data + 1, len - 1); 1414 req->reply_len = len - 1; 1415 } 1416 pmu_done(req); 1417 } else { 1418 #ifdef CONFIG_XMON 1419 if (len == 4 && data[1] == 0x2c) { 1420 extern int xmon_wants_key, xmon_adb_keycode; 1421 if (xmon_wants_key) { 1422 xmon_adb_keycode = data[2]; 1423 return; 1424 } 1425 } 1426 #endif /* CONFIG_XMON */ 1427 #ifdef CONFIG_ADB 1428 /* 1429 * XXX On the [23]400 the PMU gives us an up 1430 * event for keycodes 0x74 or 0x75 when the PC 1431 * card eject buttons are released, so we 1432 * ignore those events. 1433 */ 1434 if (!(pmu_kind == PMU_OHARE_BASED && len == 4 1435 && data[1] == 0x2c && data[3] == 0xff 1436 && (data[2] & ~1) == 0xf4)) 1437 adb_input(data+1, len-1, 1); 1438 #endif /* CONFIG_ADB */ 1439 } 1440 break; 1441 1442 /* Sound/brightness button pressed */ 1443 case PMU_INT_SNDBRT: 1444 #ifdef CONFIG_PMAC_BACKLIGHT 1445 if (len == 3) 1446 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4); 1447 #endif 1448 break; 1449 1450 /* Tick interrupt */ 1451 case PMU_INT_TICK: 1452 /* Environment or tick interrupt, query batteries */ 1453 if (pmu_battery_count) { 1454 if ((--query_batt_timer) == 0) { 1455 query_battery_state(); 1456 query_batt_timer = BATTERY_POLLING_COUNT; 1457 } 1458 } 1459 break; 1460 1461 case PMU_INT_ENVIRONMENT: 1462 if (pmu_battery_count) 1463 query_battery_state(); 1464 pmu_pass_intr(data, len); 1465 /* len == 6 is probably a bad check. But how do I 1466 * know what PMU versions send what events here? */ 1467 if (len == 6) { 1468 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8)); 1469 via_pmu_event(PMU_EVT_LID, data[1]&1); 1470 } 1471 break; 1472 1473 default: 1474 pmu_pass_intr(data, len); 1475 } 1476 goto next; 1477 } 1478 1479 static struct adb_request* 1480 pmu_sr_intr(void) 1481 { 1482 struct adb_request *req; 1483 int bite = 0; 1484 1485 if (in_8(&via2[B]) & TREQ) { 1486 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via2[B])); 1487 return NULL; 1488 } 1489 /* The ack may not yet be low when we get the interrupt */ 1490 while ((in_8(&via2[B]) & TACK) != 0) 1491 ; 1492 1493 /* if reading grab the byte, and reset the interrupt */ 1494 if (pmu_state == reading || pmu_state == reading_intr) 1495 bite = in_8(&via1[SR]); 1496 1497 /* reset TREQ and wait for TACK to go high */ 1498 out_8(&via2[B], in_8(&via2[B]) | TREQ); 1499 wait_for_ack(); 1500 1501 switch (pmu_state) { 1502 case sending: 1503 req = current_req; 1504 if (data_len < 0) { 1505 data_len = req->nbytes - 1; 1506 send_byte(data_len); 1507 break; 1508 } 1509 if (data_index <= data_len) { 1510 send_byte(req->data[data_index++]); 1511 break; 1512 } 1513 req->sent = 1; 1514 data_len = pmu_data_len[req->data[0]][1]; 1515 if (data_len == 0) { 1516 pmu_state = idle; 1517 current_req = req->next; 1518 if (req->reply_expected) 1519 req_awaiting_reply = req; 1520 else 1521 return req; 1522 } else { 1523 pmu_state = reading; 1524 data_index = 0; 1525 reply_ptr = req->reply + req->reply_len; 1526 recv_byte(); 1527 } 1528 break; 1529 1530 case intack: 1531 data_index = 0; 1532 data_len = -1; 1533 pmu_state = reading_intr; 1534 reply_ptr = interrupt_data[int_data_last]; 1535 recv_byte(); 1536 if (gpio_irq >= 0 && !gpio_irq_enabled) { 1537 enable_irq(gpio_irq); 1538 gpio_irq_enabled = 1; 1539 } 1540 break; 1541 1542 case reading: 1543 case reading_intr: 1544 if (data_len == -1) { 1545 data_len = bite; 1546 if (bite > 32) 1547 printk(KERN_ERR "PMU: bad reply len %d\n", bite); 1548 } else if (data_index < 32) { 1549 reply_ptr[data_index++] = bite; 1550 } 1551 if (data_index < data_len) { 1552 recv_byte(); 1553 break; 1554 } 1555 1556 if (pmu_state == reading_intr) { 1557 pmu_state = idle; 1558 int_data_state[int_data_last] = int_data_ready; 1559 interrupt_data_len[int_data_last] = data_len; 1560 } else { 1561 req = current_req; 1562 /* 1563 * For PMU sleep and freq change requests, we lock the 1564 * PMU until it's explicitly unlocked. This avoids any 1565 * spurrious event polling getting in 1566 */ 1567 current_req = req->next; 1568 req->reply_len += data_index; 1569 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED) 1570 pmu_state = locked; 1571 else 1572 pmu_state = idle; 1573 return req; 1574 } 1575 break; 1576 1577 default: 1578 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n", 1579 pmu_state); 1580 } 1581 return NULL; 1582 } 1583 1584 static irqreturn_t 1585 via_pmu_interrupt(int irq, void *arg) 1586 { 1587 unsigned long flags; 1588 int intr; 1589 int nloop = 0; 1590 int int_data = -1; 1591 struct adb_request *req = NULL; 1592 int handled = 0; 1593 1594 /* This is a bit brutal, we can probably do better */ 1595 spin_lock_irqsave(&pmu_lock, flags); 1596 ++disable_poll; 1597 1598 for (;;) { 1599 /* On 68k Macs, VIA interrupts are dispatched individually. 1600 * Unless we are polling, the relevant IRQ flag has already 1601 * been cleared. 1602 */ 1603 intr = 0; 1604 if (IS_ENABLED(CONFIG_PPC_PMAC) || !irq) { 1605 intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT); 1606 out_8(&via1[IFR], intr); 1607 } 1608 #ifndef CONFIG_PPC_PMAC 1609 switch (irq) { 1610 case IRQ_MAC_ADB_CL: 1611 intr = CB1_INT; 1612 break; 1613 case IRQ_MAC_ADB_SR: 1614 intr = SR_INT; 1615 break; 1616 } 1617 #endif 1618 if (intr == 0) 1619 break; 1620 handled = 1; 1621 if (++nloop > 1000) { 1622 printk(KERN_DEBUG "PMU: stuck in intr loop, " 1623 "intr=%x, ier=%x pmu_state=%d\n", 1624 intr, in_8(&via1[IER]), pmu_state); 1625 break; 1626 } 1627 if (intr & CB1_INT) { 1628 adb_int_pending = 1; 1629 pmu_irq_stats[11]++; 1630 } 1631 if (intr & SR_INT) { 1632 req = pmu_sr_intr(); 1633 if (req) 1634 break; 1635 } 1636 #ifndef CONFIG_PPC_PMAC 1637 break; 1638 #endif 1639 } 1640 1641 recheck: 1642 if (pmu_state == idle) { 1643 if (adb_int_pending) { 1644 if (int_data_state[0] == int_data_empty) 1645 int_data_last = 0; 1646 else if (int_data_state[1] == int_data_empty) 1647 int_data_last = 1; 1648 else 1649 goto no_free_slot; 1650 pmu_state = intack; 1651 int_data_state[int_data_last] = int_data_fill; 1652 /* Sounds safer to make sure ACK is high before writing. 1653 * This helped kill a problem with ADB and some iBooks 1654 */ 1655 wait_for_ack(); 1656 send_byte(PMU_INT_ACK); 1657 adb_int_pending = 0; 1658 } else if (current_req) 1659 pmu_start(); 1660 } 1661 no_free_slot: 1662 /* Mark the oldest buffer for flushing */ 1663 if (int_data_state[!int_data_last] == int_data_ready) { 1664 int_data_state[!int_data_last] = int_data_flush; 1665 int_data = !int_data_last; 1666 } else if (int_data_state[int_data_last] == int_data_ready) { 1667 int_data_state[int_data_last] = int_data_flush; 1668 int_data = int_data_last; 1669 } 1670 --disable_poll; 1671 spin_unlock_irqrestore(&pmu_lock, flags); 1672 1673 /* Deal with completed PMU requests outside of the lock */ 1674 if (req) { 1675 pmu_done(req); 1676 req = NULL; 1677 } 1678 1679 /* Deal with interrupt datas outside of the lock */ 1680 if (int_data >= 0) { 1681 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]); 1682 spin_lock_irqsave(&pmu_lock, flags); 1683 ++disable_poll; 1684 int_data_state[int_data] = int_data_empty; 1685 int_data = -1; 1686 goto recheck; 1687 } 1688 1689 return IRQ_RETVAL(handled); 1690 } 1691 1692 void 1693 pmu_unlock(void) 1694 { 1695 unsigned long flags; 1696 1697 spin_lock_irqsave(&pmu_lock, flags); 1698 if (pmu_state == locked) 1699 pmu_state = idle; 1700 adb_int_pending = 1; 1701 spin_unlock_irqrestore(&pmu_lock, flags); 1702 } 1703 1704 1705 static __maybe_unused irqreturn_t 1706 gpio1_interrupt(int irq, void *arg) 1707 { 1708 unsigned long flags; 1709 1710 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) { 1711 spin_lock_irqsave(&pmu_lock, flags); 1712 if (gpio_irq_enabled > 0) { 1713 disable_irq_nosync(gpio_irq); 1714 gpio_irq_enabled = 0; 1715 } 1716 pmu_irq_stats[12]++; 1717 adb_int_pending = 1; 1718 spin_unlock_irqrestore(&pmu_lock, flags); 1719 via_pmu_interrupt(0, NULL); 1720 return IRQ_HANDLED; 1721 } 1722 return IRQ_NONE; 1723 } 1724 1725 void 1726 pmu_enable_irled(int on) 1727 { 1728 struct adb_request req; 1729 1730 if (pmu_state == uninitialized) 1731 return ; 1732 if (pmu_kind == PMU_KEYLARGO_BASED) 1733 return ; 1734 1735 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED | 1736 (on ? PMU_POW_ON : PMU_POW_OFF)); 1737 pmu_wait_complete(&req); 1738 } 1739 1740 /* Offset between Unix time (1970-based) and Mac time (1904-based) */ 1741 #define RTC_OFFSET 2082844800 1742 1743 time64_t pmu_get_time(void) 1744 { 1745 struct adb_request req; 1746 u32 now; 1747 1748 if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0) 1749 return 0; 1750 pmu_wait_complete(&req); 1751 if (req.reply_len != 4) 1752 pr_err("%s: got %d byte reply\n", __func__, req.reply_len); 1753 now = (req.reply[0] << 24) + (req.reply[1] << 16) + 1754 (req.reply[2] << 8) + req.reply[3]; 1755 return (time64_t)now - RTC_OFFSET; 1756 } 1757 1758 int pmu_set_rtc_time(struct rtc_time *tm) 1759 { 1760 u32 now; 1761 struct adb_request req; 1762 1763 now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET); 1764 if (pmu_request(&req, NULL, 5, PMU_SET_RTC, 1765 now >> 24, now >> 16, now >> 8, now) < 0) 1766 return -ENXIO; 1767 pmu_wait_complete(&req); 1768 if (req.reply_len != 0) 1769 pr_err("%s: got %d byte reply\n", __func__, req.reply_len); 1770 return 0; 1771 } 1772 1773 void 1774 pmu_restart(void) 1775 { 1776 struct adb_request req; 1777 1778 if (pmu_state == uninitialized) 1779 return; 1780 1781 local_irq_disable(); 1782 1783 drop_interrupts = 1; 1784 1785 if (pmu_kind != PMU_KEYLARGO_BASED) { 1786 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1787 PMU_INT_TICK ); 1788 while(!req.complete) 1789 pmu_poll(); 1790 } 1791 1792 pmu_request(&req, NULL, 1, PMU_RESET); 1793 pmu_wait_complete(&req); 1794 for (;;) 1795 ; 1796 } 1797 1798 void 1799 pmu_shutdown(void) 1800 { 1801 struct adb_request req; 1802 1803 if (pmu_state == uninitialized) 1804 return; 1805 1806 local_irq_disable(); 1807 1808 drop_interrupts = 1; 1809 1810 if (pmu_kind != PMU_KEYLARGO_BASED) { 1811 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1812 PMU_INT_TICK ); 1813 pmu_wait_complete(&req); 1814 } else { 1815 /* Disable server mode on shutdown or we'll just 1816 * wake up again 1817 */ 1818 pmu_set_server_mode(0); 1819 } 1820 1821 pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 1822 'M', 'A', 'T', 'T'); 1823 pmu_wait_complete(&req); 1824 for (;;) 1825 ; 1826 } 1827 1828 int 1829 pmu_present(void) 1830 { 1831 return pmu_state != uninitialized; 1832 } 1833 1834 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 1835 /* 1836 * Put the powerbook to sleep. 1837 */ 1838 1839 static u32 save_via[8]; 1840 1841 static void 1842 save_via_state(void) 1843 { 1844 save_via[0] = in_8(&via1[ANH]); 1845 save_via[1] = in_8(&via1[DIRA]); 1846 save_via[2] = in_8(&via1[B]); 1847 save_via[3] = in_8(&via1[DIRB]); 1848 save_via[4] = in_8(&via1[PCR]); 1849 save_via[5] = in_8(&via1[ACR]); 1850 save_via[6] = in_8(&via1[T1CL]); 1851 save_via[7] = in_8(&via1[T1CH]); 1852 } 1853 static void 1854 restore_via_state(void) 1855 { 1856 out_8(&via1[ANH], save_via[0]); 1857 out_8(&via1[DIRA], save_via[1]); 1858 out_8(&via1[B], save_via[2]); 1859 out_8(&via1[DIRB], save_via[3]); 1860 out_8(&via1[PCR], save_via[4]); 1861 out_8(&via1[ACR], save_via[5]); 1862 out_8(&via1[T1CL], save_via[6]); 1863 out_8(&via1[T1CH], save_via[7]); 1864 out_8(&via1[IER], IER_CLR | 0x7f); /* disable all intrs */ 1865 out_8(&via1[IFR], 0x7f); /* clear IFR */ 1866 out_8(&via1[IER], IER_SET | SR_INT | CB1_INT); 1867 } 1868 1869 #define GRACKLE_PM (1<<7) 1870 #define GRACKLE_DOZE (1<<5) 1871 #define GRACKLE_NAP (1<<4) 1872 #define GRACKLE_SLEEP (1<<3) 1873 1874 static int powerbook_sleep_grackle(void) 1875 { 1876 unsigned long save_l2cr; 1877 unsigned short pmcr1; 1878 struct adb_request req; 1879 struct pci_dev *grackle; 1880 1881 grackle = pci_get_domain_bus_and_slot(0, 0, 0); 1882 if (!grackle) 1883 return -ENODEV; 1884 1885 /* Turn off various things. Darwin does some retry tests here... */ 1886 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE); 1887 pmu_wait_complete(&req); 1888 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1889 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY); 1890 pmu_wait_complete(&req); 1891 1892 /* For 750, save backside cache setting and disable it */ 1893 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 1894 1895 if (!__fake_sleep) { 1896 /* Ask the PMU to put us to sleep */ 1897 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1898 pmu_wait_complete(&req); 1899 } 1900 1901 /* The VIA is supposed not to be restored correctly*/ 1902 save_via_state(); 1903 /* We shut down some HW */ 1904 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 1905 1906 pci_read_config_word(grackle, 0x70, &pmcr1); 1907 /* Apparently, MacOS uses NAP mode for Grackle ??? */ 1908 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 1909 pmcr1 |= GRACKLE_PM|GRACKLE_NAP; 1910 pci_write_config_word(grackle, 0x70, pmcr1); 1911 1912 /* Call low-level ASM sleep handler */ 1913 if (__fake_sleep) 1914 mdelay(5000); 1915 else 1916 low_sleep_handler(); 1917 1918 /* We're awake again, stop grackle PM */ 1919 pci_read_config_word(grackle, 0x70, &pmcr1); 1920 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 1921 pci_write_config_word(grackle, 0x70, pmcr1); 1922 1923 pci_dev_put(grackle); 1924 1925 /* Make sure the PMU is idle */ 1926 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 1927 restore_via_state(); 1928 1929 /* Restore L2 cache */ 1930 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 1931 _set_L2CR(save_l2cr); 1932 1933 /* Restore userland MMU context */ 1934 switch_mmu_context(NULL, current->active_mm, NULL); 1935 1936 /* Power things up */ 1937 pmu_unlock(); 1938 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1939 pmu_wait_complete(&req); 1940 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, 1941 PMU_POW0_ON|PMU_POW0_HARD_DRIVE); 1942 pmu_wait_complete(&req); 1943 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1944 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY); 1945 pmu_wait_complete(&req); 1946 1947 return 0; 1948 } 1949 1950 static int 1951 powerbook_sleep_Core99(void) 1952 { 1953 unsigned long save_l2cr; 1954 unsigned long save_l3cr; 1955 struct adb_request req; 1956 1957 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) { 1958 printk(KERN_ERR "Sleep mode not supported on this machine\n"); 1959 return -ENOSYS; 1960 } 1961 1962 if (num_online_cpus() > 1 || cpu_is_offline(0)) 1963 return -EAGAIN; 1964 1965 /* Stop environment and ADB interrupts */ 1966 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 1967 pmu_wait_complete(&req); 1968 1969 /* Tell PMU what events will wake us up */ 1970 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS, 1971 0xff, 0xff); 1972 pmu_wait_complete(&req); 1973 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS, 1974 0, PMU_PWR_WAKEUP_KEY | 1975 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0)); 1976 pmu_wait_complete(&req); 1977 1978 /* Save the state of the L2 and L3 caches */ 1979 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */ 1980 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 1981 1982 if (!__fake_sleep) { 1983 /* Ask the PMU to put us to sleep */ 1984 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1985 pmu_wait_complete(&req); 1986 } 1987 1988 /* The VIA is supposed not to be restored correctly*/ 1989 save_via_state(); 1990 1991 /* Shut down various ASICs. There's a chance that we can no longer 1992 * talk to the PMU after this, so I moved it to _after_ sending the 1993 * sleep command to it. Still need to be checked. 1994 */ 1995 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 1996 1997 /* Call low-level ASM sleep handler */ 1998 if (__fake_sleep) 1999 mdelay(5000); 2000 else 2001 low_sleep_handler(); 2002 2003 /* Restore Apple core ASICs state */ 2004 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 2005 2006 /* Restore VIA */ 2007 restore_via_state(); 2008 2009 /* tweak LPJ before cpufreq is there */ 2010 loops_per_jiffy *= 2; 2011 2012 /* Restore video */ 2013 pmac_call_early_video_resume(); 2014 2015 /* Restore L2 cache */ 2016 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2017 _set_L2CR(save_l2cr); 2018 /* Restore L3 cache */ 2019 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0) 2020 _set_L3CR(save_l3cr); 2021 2022 /* Restore userland MMU context */ 2023 switch_mmu_context(NULL, current->active_mm, NULL); 2024 2025 /* Tell PMU we are ready */ 2026 pmu_unlock(); 2027 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2028 pmu_wait_complete(&req); 2029 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2030 pmu_wait_complete(&req); 2031 2032 /* Restore LPJ, cpufreq will adjust the cpu frequency */ 2033 loops_per_jiffy /= 2; 2034 2035 return 0; 2036 } 2037 2038 #define PB3400_MEM_CTRL 0xf8000000 2039 #define PB3400_MEM_CTRL_SLEEP 0x70 2040 2041 static void __iomem *pb3400_mem_ctrl; 2042 2043 static void powerbook_sleep_init_3400(void) 2044 { 2045 /* map in the memory controller registers */ 2046 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100); 2047 if (pb3400_mem_ctrl == NULL) 2048 printk(KERN_WARNING "ioremap failed: sleep won't be possible"); 2049 } 2050 2051 static int powerbook_sleep_3400(void) 2052 { 2053 int i, x; 2054 unsigned int hid0; 2055 unsigned long msr; 2056 struct adb_request sleep_req; 2057 unsigned int __iomem *mem_ctrl_sleep; 2058 2059 if (pb3400_mem_ctrl == NULL) 2060 return -ENOMEM; 2061 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP; 2062 2063 /* Set the memory controller to keep the memory refreshed 2064 while we're asleep */ 2065 for (i = 0x403f; i >= 0x4000; --i) { 2066 out_be32(mem_ctrl_sleep, i); 2067 do { 2068 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff; 2069 } while (x == 0); 2070 if (x >= 0x100) 2071 break; 2072 } 2073 2074 /* Ask the PMU to put us to sleep */ 2075 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2076 pmu_wait_complete(&sleep_req); 2077 pmu_unlock(); 2078 2079 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 2080 2081 asleep = 1; 2082 2083 /* Put the CPU into sleep mode */ 2084 hid0 = mfspr(SPRN_HID0); 2085 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP; 2086 mtspr(SPRN_HID0, hid0); 2087 local_irq_enable(); 2088 msr = mfmsr() | MSR_POW; 2089 while (asleep) { 2090 mb(); 2091 mtmsr(msr); 2092 isync(); 2093 } 2094 local_irq_disable(); 2095 2096 /* OK, we're awake again, start restoring things */ 2097 out_be32(mem_ctrl_sleep, 0x3f); 2098 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 2099 2100 return 0; 2101 } 2102 2103 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2104 2105 /* 2106 * Support for /dev/pmu device 2107 */ 2108 #define RB_SIZE 0x10 2109 struct pmu_private { 2110 struct list_head list; 2111 int rb_get; 2112 int rb_put; 2113 struct rb_entry { 2114 unsigned short len; 2115 unsigned char data[16]; 2116 } rb_buf[RB_SIZE]; 2117 wait_queue_head_t wait; 2118 spinlock_t lock; 2119 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2120 int backlight_locker; 2121 #endif 2122 }; 2123 2124 static LIST_HEAD(all_pmu_pvt); 2125 static DEFINE_SPINLOCK(all_pvt_lock); 2126 2127 static void 2128 pmu_pass_intr(unsigned char *data, int len) 2129 { 2130 struct pmu_private *pp; 2131 struct list_head *list; 2132 int i; 2133 unsigned long flags; 2134 2135 if (len > sizeof(pp->rb_buf[0].data)) 2136 len = sizeof(pp->rb_buf[0].data); 2137 spin_lock_irqsave(&all_pvt_lock, flags); 2138 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) { 2139 pp = list_entry(list, struct pmu_private, list); 2140 spin_lock(&pp->lock); 2141 i = pp->rb_put + 1; 2142 if (i >= RB_SIZE) 2143 i = 0; 2144 if (i != pp->rb_get) { 2145 struct rb_entry *rp = &pp->rb_buf[pp->rb_put]; 2146 rp->len = len; 2147 memcpy(rp->data, data, len); 2148 pp->rb_put = i; 2149 wake_up_interruptible(&pp->wait); 2150 } 2151 spin_unlock(&pp->lock); 2152 } 2153 spin_unlock_irqrestore(&all_pvt_lock, flags); 2154 } 2155 2156 static int 2157 pmu_open(struct inode *inode, struct file *file) 2158 { 2159 struct pmu_private *pp; 2160 unsigned long flags; 2161 2162 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL); 2163 if (!pp) 2164 return -ENOMEM; 2165 pp->rb_get = pp->rb_put = 0; 2166 spin_lock_init(&pp->lock); 2167 init_waitqueue_head(&pp->wait); 2168 mutex_lock(&pmu_info_proc_mutex); 2169 spin_lock_irqsave(&all_pvt_lock, flags); 2170 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2171 pp->backlight_locker = 0; 2172 #endif 2173 list_add(&pp->list, &all_pmu_pvt); 2174 spin_unlock_irqrestore(&all_pvt_lock, flags); 2175 file->private_data = pp; 2176 mutex_unlock(&pmu_info_proc_mutex); 2177 return 0; 2178 } 2179 2180 static ssize_t 2181 pmu_read(struct file *file, char __user *buf, 2182 size_t count, loff_t *ppos) 2183 { 2184 struct pmu_private *pp = file->private_data; 2185 DECLARE_WAITQUEUE(wait, current); 2186 unsigned long flags; 2187 int ret = 0; 2188 2189 if (count < 1 || !pp) 2190 return -EINVAL; 2191 if (!access_ok(VERIFY_WRITE, buf, count)) 2192 return -EFAULT; 2193 2194 spin_lock_irqsave(&pp->lock, flags); 2195 add_wait_queue(&pp->wait, &wait); 2196 set_current_state(TASK_INTERRUPTIBLE); 2197 2198 for (;;) { 2199 ret = -EAGAIN; 2200 if (pp->rb_get != pp->rb_put) { 2201 int i = pp->rb_get; 2202 struct rb_entry *rp = &pp->rb_buf[i]; 2203 ret = rp->len; 2204 spin_unlock_irqrestore(&pp->lock, flags); 2205 if (ret > count) 2206 ret = count; 2207 if (ret > 0 && copy_to_user(buf, rp->data, ret)) 2208 ret = -EFAULT; 2209 if (++i >= RB_SIZE) 2210 i = 0; 2211 spin_lock_irqsave(&pp->lock, flags); 2212 pp->rb_get = i; 2213 } 2214 if (ret >= 0) 2215 break; 2216 if (file->f_flags & O_NONBLOCK) 2217 break; 2218 ret = -ERESTARTSYS; 2219 if (signal_pending(current)) 2220 break; 2221 spin_unlock_irqrestore(&pp->lock, flags); 2222 schedule(); 2223 spin_lock_irqsave(&pp->lock, flags); 2224 } 2225 __set_current_state(TASK_RUNNING); 2226 remove_wait_queue(&pp->wait, &wait); 2227 spin_unlock_irqrestore(&pp->lock, flags); 2228 2229 return ret; 2230 } 2231 2232 static ssize_t 2233 pmu_write(struct file *file, const char __user *buf, 2234 size_t count, loff_t *ppos) 2235 { 2236 return 0; 2237 } 2238 2239 static __poll_t 2240 pmu_fpoll(struct file *filp, poll_table *wait) 2241 { 2242 struct pmu_private *pp = filp->private_data; 2243 __poll_t mask = 0; 2244 unsigned long flags; 2245 2246 if (!pp) 2247 return 0; 2248 poll_wait(filp, &pp->wait, wait); 2249 spin_lock_irqsave(&pp->lock, flags); 2250 if (pp->rb_get != pp->rb_put) 2251 mask |= EPOLLIN; 2252 spin_unlock_irqrestore(&pp->lock, flags); 2253 return mask; 2254 } 2255 2256 static int 2257 pmu_release(struct inode *inode, struct file *file) 2258 { 2259 struct pmu_private *pp = file->private_data; 2260 unsigned long flags; 2261 2262 if (pp) { 2263 file->private_data = NULL; 2264 spin_lock_irqsave(&all_pvt_lock, flags); 2265 list_del(&pp->list); 2266 spin_unlock_irqrestore(&all_pvt_lock, flags); 2267 2268 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2269 if (pp->backlight_locker) 2270 pmac_backlight_enable(); 2271 #endif 2272 2273 kfree(pp); 2274 } 2275 return 0; 2276 } 2277 2278 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 2279 static void pmac_suspend_disable_irqs(void) 2280 { 2281 /* Call platform functions marked "on sleep" */ 2282 pmac_pfunc_i2c_suspend(); 2283 pmac_pfunc_base_suspend(); 2284 } 2285 2286 static int powerbook_sleep(suspend_state_t state) 2287 { 2288 int error = 0; 2289 2290 /* Wait for completion of async requests */ 2291 while (!batt_req.complete) 2292 pmu_poll(); 2293 2294 /* Giveup the lazy FPU & vec so we don't have to back them 2295 * up from the low level code 2296 */ 2297 enable_kernel_fp(); 2298 2299 #ifdef CONFIG_ALTIVEC 2300 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 2301 enable_kernel_altivec(); 2302 #endif /* CONFIG_ALTIVEC */ 2303 2304 switch (pmu_kind) { 2305 case PMU_OHARE_BASED: 2306 error = powerbook_sleep_3400(); 2307 break; 2308 case PMU_HEATHROW_BASED: 2309 case PMU_PADDINGTON_BASED: 2310 error = powerbook_sleep_grackle(); 2311 break; 2312 case PMU_KEYLARGO_BASED: 2313 error = powerbook_sleep_Core99(); 2314 break; 2315 default: 2316 return -ENOSYS; 2317 } 2318 2319 if (error) 2320 return error; 2321 2322 mdelay(100); 2323 2324 return 0; 2325 } 2326 2327 static void pmac_suspend_enable_irqs(void) 2328 { 2329 /* Force a poll of ADB interrupts */ 2330 adb_int_pending = 1; 2331 via_pmu_interrupt(0, NULL); 2332 2333 mdelay(10); 2334 2335 /* Call platform functions marked "on wake" */ 2336 pmac_pfunc_base_resume(); 2337 pmac_pfunc_i2c_resume(); 2338 } 2339 2340 static int pmu_sleep_valid(suspend_state_t state) 2341 { 2342 return state == PM_SUSPEND_MEM 2343 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0); 2344 } 2345 2346 static const struct platform_suspend_ops pmu_pm_ops = { 2347 .enter = powerbook_sleep, 2348 .valid = pmu_sleep_valid, 2349 }; 2350 2351 static int register_pmu_pm_ops(void) 2352 { 2353 if (pmu_kind == PMU_OHARE_BASED) 2354 powerbook_sleep_init_3400(); 2355 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs; 2356 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs; 2357 suspend_set_ops(&pmu_pm_ops); 2358 2359 return 0; 2360 } 2361 2362 device_initcall(register_pmu_pm_ops); 2363 #endif 2364 2365 static int pmu_ioctl(struct file *filp, 2366 u_int cmd, u_long arg) 2367 { 2368 __u32 __user *argp = (__u32 __user *)arg; 2369 int error = -EINVAL; 2370 2371 switch (cmd) { 2372 #ifdef CONFIG_PPC_PMAC 2373 case PMU_IOC_SLEEP: 2374 if (!capable(CAP_SYS_ADMIN)) 2375 return -EACCES; 2376 return pm_suspend(PM_SUSPEND_MEM); 2377 case PMU_IOC_CAN_SLEEP: 2378 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0) 2379 return put_user(0, argp); 2380 else 2381 return put_user(1, argp); 2382 #endif 2383 2384 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY 2385 /* Compatibility ioctl's for backlight */ 2386 case PMU_IOC_GET_BACKLIGHT: 2387 { 2388 int brightness; 2389 2390 brightness = pmac_backlight_get_legacy_brightness(); 2391 if (brightness < 0) 2392 return brightness; 2393 else 2394 return put_user(brightness, argp); 2395 2396 } 2397 case PMU_IOC_SET_BACKLIGHT: 2398 { 2399 int brightness; 2400 2401 error = get_user(brightness, argp); 2402 if (error) 2403 return error; 2404 2405 return pmac_backlight_set_legacy_brightness(brightness); 2406 } 2407 #ifdef CONFIG_INPUT_ADBHID 2408 case PMU_IOC_GRAB_BACKLIGHT: { 2409 struct pmu_private *pp = filp->private_data; 2410 2411 if (pp->backlight_locker) 2412 return 0; 2413 2414 pp->backlight_locker = 1; 2415 pmac_backlight_disable(); 2416 2417 return 0; 2418 } 2419 #endif /* CONFIG_INPUT_ADBHID */ 2420 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */ 2421 2422 case PMU_IOC_GET_MODEL: 2423 return put_user(pmu_kind, argp); 2424 case PMU_IOC_HAS_ADB: 2425 return put_user(pmu_has_adb, argp); 2426 } 2427 return error; 2428 } 2429 2430 static long pmu_unlocked_ioctl(struct file *filp, 2431 u_int cmd, u_long arg) 2432 { 2433 int ret; 2434 2435 mutex_lock(&pmu_info_proc_mutex); 2436 ret = pmu_ioctl(filp, cmd, arg); 2437 mutex_unlock(&pmu_info_proc_mutex); 2438 2439 return ret; 2440 } 2441 2442 #ifdef CONFIG_COMPAT 2443 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t) 2444 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t) 2445 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t) 2446 #define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t) 2447 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t) 2448 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t) 2449 2450 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg) 2451 { 2452 switch (cmd) { 2453 case PMU_IOC_SLEEP: 2454 break; 2455 case PMU_IOC_GET_BACKLIGHT32: 2456 cmd = PMU_IOC_GET_BACKLIGHT; 2457 break; 2458 case PMU_IOC_SET_BACKLIGHT32: 2459 cmd = PMU_IOC_SET_BACKLIGHT; 2460 break; 2461 case PMU_IOC_GET_MODEL32: 2462 cmd = PMU_IOC_GET_MODEL; 2463 break; 2464 case PMU_IOC_HAS_ADB32: 2465 cmd = PMU_IOC_HAS_ADB; 2466 break; 2467 case PMU_IOC_CAN_SLEEP32: 2468 cmd = PMU_IOC_CAN_SLEEP; 2469 break; 2470 case PMU_IOC_GRAB_BACKLIGHT32: 2471 cmd = PMU_IOC_GRAB_BACKLIGHT; 2472 break; 2473 default: 2474 return -ENOIOCTLCMD; 2475 } 2476 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); 2477 } 2478 #endif 2479 2480 static const struct file_operations pmu_device_fops = { 2481 .read = pmu_read, 2482 .write = pmu_write, 2483 .poll = pmu_fpoll, 2484 .unlocked_ioctl = pmu_unlocked_ioctl, 2485 #ifdef CONFIG_COMPAT 2486 .compat_ioctl = compat_pmu_ioctl, 2487 #endif 2488 .open = pmu_open, 2489 .release = pmu_release, 2490 .llseek = noop_llseek, 2491 }; 2492 2493 static struct miscdevice pmu_device = { 2494 PMU_MINOR, "pmu", &pmu_device_fops 2495 }; 2496 2497 static int pmu_device_init(void) 2498 { 2499 if (pmu_state == uninitialized) 2500 return 0; 2501 if (misc_register(&pmu_device) < 0) 2502 printk(KERN_ERR "via-pmu: cannot register misc device.\n"); 2503 return 0; 2504 } 2505 device_initcall(pmu_device_init); 2506 2507 2508 #ifdef DEBUG_SLEEP 2509 static inline void 2510 polled_handshake(void) 2511 { 2512 via2[B] &= ~TREQ; eieio(); 2513 while ((via2[B] & TACK) != 0) 2514 ; 2515 via2[B] |= TREQ; eieio(); 2516 while ((via2[B] & TACK) == 0) 2517 ; 2518 } 2519 2520 static inline void 2521 polled_send_byte(int x) 2522 { 2523 via1[ACR] |= SR_OUT | SR_EXT; eieio(); 2524 via1[SR] = x; eieio(); 2525 polled_handshake(); 2526 } 2527 2528 static inline int 2529 polled_recv_byte(void) 2530 { 2531 int x; 2532 2533 via1[ACR] = (via1[ACR] & ~SR_OUT) | SR_EXT; eieio(); 2534 x = via1[SR]; eieio(); 2535 polled_handshake(); 2536 x = via1[SR]; eieio(); 2537 return x; 2538 } 2539 2540 int 2541 pmu_polled_request(struct adb_request *req) 2542 { 2543 unsigned long flags; 2544 int i, l, c; 2545 2546 req->complete = 1; 2547 c = req->data[0]; 2548 l = pmu_data_len[c][0]; 2549 if (l >= 0 && req->nbytes != l + 1) 2550 return -EINVAL; 2551 2552 local_irq_save(flags); 2553 while (pmu_state != idle) 2554 pmu_poll(); 2555 2556 while ((via2[B] & TACK) == 0) 2557 ; 2558 polled_send_byte(c); 2559 if (l < 0) { 2560 l = req->nbytes - 1; 2561 polled_send_byte(l); 2562 } 2563 for (i = 1; i <= l; ++i) 2564 polled_send_byte(req->data[i]); 2565 2566 l = pmu_data_len[c][1]; 2567 if (l < 0) 2568 l = polled_recv_byte(); 2569 for (i = 0; i < l; ++i) 2570 req->reply[i + req->reply_len] = polled_recv_byte(); 2571 2572 if (req->done) 2573 (*req->done)(req); 2574 2575 local_irq_restore(flags); 2576 return 0; 2577 } 2578 2579 /* N.B. This doesn't work on the 3400 */ 2580 void pmu_blink(int n) 2581 { 2582 struct adb_request req; 2583 2584 memset(&req, 0, sizeof(req)); 2585 2586 for (; n > 0; --n) { 2587 req.nbytes = 4; 2588 req.done = NULL; 2589 req.data[0] = 0xee; 2590 req.data[1] = 4; 2591 req.data[2] = 0; 2592 req.data[3] = 1; 2593 req.reply[0] = ADB_RET_OK; 2594 req.reply_len = 1; 2595 req.reply_expected = 0; 2596 pmu_polled_request(&req); 2597 mdelay(50); 2598 req.nbytes = 4; 2599 req.done = NULL; 2600 req.data[0] = 0xee; 2601 req.data[1] = 4; 2602 req.data[2] = 0; 2603 req.data[3] = 0; 2604 req.reply[0] = ADB_RET_OK; 2605 req.reply_len = 1; 2606 req.reply_expected = 0; 2607 pmu_polled_request(&req); 2608 mdelay(50); 2609 } 2610 mdelay(50); 2611 } 2612 #endif /* DEBUG_SLEEP */ 2613 2614 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 2615 int pmu_sys_suspended; 2616 2617 static int pmu_syscore_suspend(void) 2618 { 2619 /* Suspend PMU event interrupts */ 2620 pmu_suspend(); 2621 pmu_sys_suspended = 1; 2622 2623 #ifdef CONFIG_PMAC_BACKLIGHT 2624 /* Tell backlight code not to muck around with the chip anymore */ 2625 pmu_backlight_set_sleep(1); 2626 #endif 2627 2628 return 0; 2629 } 2630 2631 static void pmu_syscore_resume(void) 2632 { 2633 struct adb_request req; 2634 2635 if (!pmu_sys_suspended) 2636 return; 2637 2638 /* Tell PMU we are ready */ 2639 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2640 pmu_wait_complete(&req); 2641 2642 #ifdef CONFIG_PMAC_BACKLIGHT 2643 /* Tell backlight code it can use the chip again */ 2644 pmu_backlight_set_sleep(0); 2645 #endif 2646 /* Resume PMU event interrupts */ 2647 pmu_resume(); 2648 pmu_sys_suspended = 0; 2649 } 2650 2651 static struct syscore_ops pmu_syscore_ops = { 2652 .suspend = pmu_syscore_suspend, 2653 .resume = pmu_syscore_resume, 2654 }; 2655 2656 static int pmu_syscore_register(void) 2657 { 2658 register_syscore_ops(&pmu_syscore_ops); 2659 2660 return 0; 2661 } 2662 subsys_initcall(pmu_syscore_register); 2663 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2664 2665 EXPORT_SYMBOL(pmu_request); 2666 EXPORT_SYMBOL(pmu_queue_request); 2667 EXPORT_SYMBOL(pmu_poll); 2668 EXPORT_SYMBOL(pmu_poll_adb); 2669 EXPORT_SYMBOL(pmu_wait_complete); 2670 EXPORT_SYMBOL(pmu_suspend); 2671 EXPORT_SYMBOL(pmu_resume); 2672 EXPORT_SYMBOL(pmu_unlock); 2673 #if defined(CONFIG_PPC32) 2674 EXPORT_SYMBOL(pmu_enable_irled); 2675 EXPORT_SYMBOL(pmu_battery_count); 2676 EXPORT_SYMBOL(pmu_batteries); 2677 EXPORT_SYMBOL(pmu_power_flags); 2678 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2679 2680