1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Device driver for the PMU in Apple PowerBooks and PowerMacs. 4 * 5 * The VIA (versatile interface adapter) interfaces to the PMU, 6 * a 6805 microprocessor core whose primary function is to control 7 * battery charging and system power on the PowerBook 3400 and 2400. 8 * The PMU also controls the ADB (Apple Desktop Bus) which connects 9 * to the keyboard and mouse, as well as the non-volatile RAM 10 * and the RTC (real time clock) chip. 11 * 12 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi. 13 * Copyright (C) 2001-2002 Benjamin Herrenschmidt 14 * Copyright (C) 2006-2007 Johannes Berg 15 * 16 * THIS DRIVER IS BECOMING A TOTAL MESS ! 17 * - Cleanup atomically disabling reply to PMU events after 18 * a sleep or a freq. switch 19 * 20 */ 21 #include <linux/stdarg.h> 22 #include <linux/mutex.h> 23 #include <linux/types.h> 24 #include <linux/errno.h> 25 #include <linux/kernel.h> 26 #include <linux/delay.h> 27 #include <linux/sched/signal.h> 28 #include <linux/miscdevice.h> 29 #include <linux/blkdev.h> 30 #include <linux/pci.h> 31 #include <linux/slab.h> 32 #include <linux/poll.h> 33 #include <linux/adb.h> 34 #include <linux/pmu.h> 35 #include <linux/cuda.h> 36 #include <linux/module.h> 37 #include <linux/spinlock.h> 38 #include <linux/pm.h> 39 #include <linux/proc_fs.h> 40 #include <linux/seq_file.h> 41 #include <linux/init.h> 42 #include <linux/interrupt.h> 43 #include <linux/device.h> 44 #include <linux/syscore_ops.h> 45 #include <linux/freezer.h> 46 #include <linux/syscalls.h> 47 #include <linux/suspend.h> 48 #include <linux/cpu.h> 49 #include <linux/compat.h> 50 #include <linux/of_address.h> 51 #include <linux/of_irq.h> 52 #include <linux/uaccess.h> 53 #include <linux/pgtable.h> 54 #include <asm/machdep.h> 55 #include <asm/io.h> 56 #include <asm/sections.h> 57 #include <asm/irq.h> 58 #ifdef CONFIG_PPC_PMAC 59 #include <asm/pmac_feature.h> 60 #include <asm/pmac_pfunc.h> 61 #include <asm/pmac_low_i2c.h> 62 #include <asm/mmu_context.h> 63 #include <asm/cputable.h> 64 #include <asm/time.h> 65 #include <asm/backlight.h> 66 #else 67 #include <asm/macintosh.h> 68 #include <asm/macints.h> 69 #include <asm/mac_via.h> 70 #endif 71 72 #include "via-pmu-event.h" 73 74 /* Some compile options */ 75 #undef DEBUG_SLEEP 76 77 /* How many iterations between battery polls */ 78 #define BATTERY_POLLING_COUNT 2 79 80 static DEFINE_MUTEX(pmu_info_proc_mutex); 81 82 /* VIA registers - spaced 0x200 bytes apart */ 83 #define RS 0x200 /* skip between registers */ 84 #define B 0 /* B-side data */ 85 #define A RS /* A-side data */ 86 #define DIRB (2*RS) /* B-side direction (1=output) */ 87 #define DIRA (3*RS) /* A-side direction (1=output) */ 88 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */ 89 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */ 90 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */ 91 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */ 92 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */ 93 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */ 94 #define SR (10*RS) /* Shift register */ 95 #define ACR (11*RS) /* Auxiliary control register */ 96 #define PCR (12*RS) /* Peripheral control register */ 97 #define IFR (13*RS) /* Interrupt flag register */ 98 #define IER (14*RS) /* Interrupt enable register */ 99 #define ANH (15*RS) /* A-side data, no handshake */ 100 101 /* Bits in B data register: both active low */ 102 #ifdef CONFIG_PPC_PMAC 103 #define TACK 0x08 /* Transfer acknowledge (input) */ 104 #define TREQ 0x10 /* Transfer request (output) */ 105 #else 106 #define TACK 0x02 107 #define TREQ 0x04 108 #endif 109 110 /* Bits in ACR */ 111 #define SR_CTRL 0x1c /* Shift register control bits */ 112 #define SR_EXT 0x0c /* Shift on external clock */ 113 #define SR_OUT 0x10 /* Shift out if 1 */ 114 115 /* Bits in IFR and IER */ 116 #define IER_SET 0x80 /* set bits in IER */ 117 #define IER_CLR 0 /* clear bits in IER */ 118 #define SR_INT 0x04 /* Shift register full/empty */ 119 #define CB2_INT 0x08 120 #define CB1_INT 0x10 /* transition on CB1 input */ 121 122 static volatile enum pmu_state { 123 uninitialized = 0, 124 idle, 125 sending, 126 intack, 127 reading, 128 reading_intr, 129 locked, 130 } pmu_state; 131 132 static volatile enum int_data_state { 133 int_data_empty, 134 int_data_fill, 135 int_data_ready, 136 int_data_flush 137 } int_data_state[2] = { int_data_empty, int_data_empty }; 138 139 static struct adb_request *current_req; 140 static struct adb_request *last_req; 141 static struct adb_request *req_awaiting_reply; 142 static unsigned char interrupt_data[2][32]; 143 static int interrupt_data_len[2]; 144 static int int_data_last; 145 static unsigned char *reply_ptr; 146 static int data_index; 147 static int data_len; 148 static volatile int adb_int_pending; 149 static volatile int disable_poll; 150 static int pmu_kind = PMU_UNKNOWN; 151 static int pmu_fully_inited; 152 static int pmu_has_adb; 153 #ifdef CONFIG_PPC_PMAC 154 static volatile unsigned char __iomem *via1; 155 static volatile unsigned char __iomem *via2; 156 static struct device_node *vias; 157 static struct device_node *gpio_node; 158 #endif 159 static unsigned char __iomem *gpio_reg; 160 static int gpio_irq = 0; 161 static int gpio_irq_enabled = -1; 162 static volatile int pmu_suspended; 163 static DEFINE_SPINLOCK(pmu_lock); 164 static u8 pmu_intr_mask; 165 static int pmu_version; 166 static int drop_interrupts; 167 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 168 static int option_lid_wakeup = 1; 169 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 170 static unsigned long async_req_locks; 171 172 #define NUM_IRQ_STATS 13 173 static unsigned int pmu_irq_stats[NUM_IRQ_STATS]; 174 175 static struct proc_dir_entry *proc_pmu_root; 176 static struct proc_dir_entry *proc_pmu_info; 177 static struct proc_dir_entry *proc_pmu_irqstats; 178 static struct proc_dir_entry *proc_pmu_options; 179 static int option_server_mode; 180 181 int pmu_battery_count; 182 static int pmu_cur_battery; 183 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT; 184 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES]; 185 static int query_batt_timer = BATTERY_POLLING_COUNT; 186 static struct adb_request batt_req; 187 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES]; 188 189 int asleep; 190 191 #ifdef CONFIG_ADB 192 static int adb_dev_map; 193 static int pmu_adb_flags; 194 195 static int pmu_probe(void); 196 static int pmu_init(void); 197 static int pmu_send_request(struct adb_request *req, int sync); 198 static int pmu_adb_autopoll(int devs); 199 static int pmu_adb_reset_bus(void); 200 #endif /* CONFIG_ADB */ 201 202 static int init_pmu(void); 203 static void pmu_start(void); 204 static irqreturn_t via_pmu_interrupt(int irq, void *arg); 205 static irqreturn_t gpio1_interrupt(int irq, void *arg); 206 static int pmu_info_proc_show(struct seq_file *m, void *v); 207 static int pmu_irqstats_proc_show(struct seq_file *m, void *v); 208 static int pmu_battery_proc_show(struct seq_file *m, void *v); 209 static void pmu_pass_intr(unsigned char *data, int len); 210 static const struct proc_ops pmu_options_proc_ops; 211 212 #ifdef CONFIG_ADB 213 const struct adb_driver via_pmu_driver = { 214 .name = "PMU", 215 .probe = pmu_probe, 216 .init = pmu_init, 217 .send_request = pmu_send_request, 218 .autopoll = pmu_adb_autopoll, 219 .poll = pmu_poll_adb, 220 .reset_bus = pmu_adb_reset_bus, 221 }; 222 #endif /* CONFIG_ADB */ 223 224 extern void low_sleep_handler(void); 225 extern void enable_kernel_altivec(void); 226 extern void enable_kernel_fp(void); 227 228 #ifdef DEBUG_SLEEP 229 int pmu_polled_request(struct adb_request *req); 230 void pmu_blink(int n); 231 #endif 232 233 /* 234 * This table indicates for each PMU opcode: 235 * - the number of data bytes to be sent with the command, or -1 236 * if a length byte should be sent, 237 * - the number of response bytes which the PMU will return, or 238 * -1 if it will send a length byte. 239 */ 240 static const s8 pmu_data_len[256][2] = { 241 /* 0 1 2 3 4 5 6 7 */ 242 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 243 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 244 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 245 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0}, 246 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0}, 247 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1}, 248 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 249 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0}, 250 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 251 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1}, 252 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0}, 253 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1}, 254 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 255 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1}, 256 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 257 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1}, 258 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 259 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 260 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 261 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 262 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0}, 263 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 264 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 265 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 266 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 267 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 268 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 269 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1}, 270 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0}, 271 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0}, 272 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 273 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 274 }; 275 276 static char *pbook_type[] = { 277 "Unknown PowerBook", 278 "PowerBook 2400/3400/3500(G3)", 279 "PowerBook G3 Series", 280 "1999 PowerBook G3", 281 "Core99" 282 }; 283 284 int __init find_via_pmu(void) 285 { 286 #ifdef CONFIG_PPC_PMAC 287 u64 taddr; 288 const u32 *reg; 289 290 if (pmu_state != uninitialized) 291 return 1; 292 vias = of_find_node_by_name(NULL, "via-pmu"); 293 if (vias == NULL) 294 return 0; 295 296 reg = of_get_property(vias, "reg", NULL); 297 if (reg == NULL) { 298 printk(KERN_ERR "via-pmu: No \"reg\" property !\n"); 299 goto fail; 300 } 301 taddr = of_translate_address(vias, reg); 302 if (taddr == OF_BAD_ADDR) { 303 printk(KERN_ERR "via-pmu: Can't translate address !\n"); 304 goto fail; 305 } 306 307 pmu_has_adb = 1; 308 309 pmu_intr_mask = PMU_INT_PCEJECT | 310 PMU_INT_SNDBRT | 311 PMU_INT_ADB | 312 PMU_INT_TICK; 313 314 if (of_node_name_eq(vias->parent, "ohare") || 315 of_device_is_compatible(vias->parent, "ohare")) 316 pmu_kind = PMU_OHARE_BASED; 317 else if (of_device_is_compatible(vias->parent, "paddington")) 318 pmu_kind = PMU_PADDINGTON_BASED; 319 else if (of_device_is_compatible(vias->parent, "heathrow")) 320 pmu_kind = PMU_HEATHROW_BASED; 321 else if (of_device_is_compatible(vias->parent, "Keylargo") 322 || of_device_is_compatible(vias->parent, "K2-Keylargo")) { 323 struct device_node *gpiop; 324 struct device_node *adbp; 325 u64 gaddr = OF_BAD_ADDR; 326 327 pmu_kind = PMU_KEYLARGO_BASED; 328 adbp = of_find_node_by_type(NULL, "adb"); 329 pmu_has_adb = (adbp != NULL); 330 of_node_put(adbp); 331 pmu_intr_mask = PMU_INT_PCEJECT | 332 PMU_INT_SNDBRT | 333 PMU_INT_ADB | 334 PMU_INT_TICK | 335 PMU_INT_ENVIRONMENT; 336 337 gpiop = of_find_node_by_name(NULL, "gpio"); 338 if (gpiop) { 339 reg = of_get_property(gpiop, "reg", NULL); 340 if (reg) 341 gaddr = of_translate_address(gpiop, reg); 342 if (gaddr != OF_BAD_ADDR) 343 gpio_reg = ioremap(gaddr, 0x10); 344 of_node_put(gpiop); 345 } 346 if (gpio_reg == NULL) { 347 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n"); 348 goto fail; 349 } 350 } else 351 pmu_kind = PMU_UNKNOWN; 352 353 via1 = via2 = ioremap(taddr, 0x2000); 354 if (via1 == NULL) { 355 printk(KERN_ERR "via-pmu: Can't map address !\n"); 356 goto fail_via_remap; 357 } 358 359 out_8(&via1[IER], IER_CLR | 0x7f); /* disable all intrs */ 360 out_8(&via1[IFR], 0x7f); /* clear IFR */ 361 362 pmu_state = idle; 363 364 if (!init_pmu()) 365 goto fail_init; 366 367 sys_ctrler = SYS_CTRLER_PMU; 368 369 return 1; 370 371 fail_init: 372 iounmap(via1); 373 via1 = via2 = NULL; 374 fail_via_remap: 375 iounmap(gpio_reg); 376 gpio_reg = NULL; 377 fail: 378 of_node_put(vias); 379 vias = NULL; 380 pmu_state = uninitialized; 381 return 0; 382 #else 383 if (macintosh_config->adb_type != MAC_ADB_PB2) 384 return 0; 385 386 pmu_kind = PMU_UNKNOWN; 387 388 pmu_has_adb = 1; 389 390 pmu_intr_mask = PMU_INT_PCEJECT | 391 PMU_INT_SNDBRT | 392 PMU_INT_ADB | 393 PMU_INT_TICK; 394 395 pmu_state = idle; 396 397 if (!init_pmu()) { 398 pmu_state = uninitialized; 399 return 0; 400 } 401 402 return 1; 403 #endif /* !CONFIG_PPC_PMAC */ 404 } 405 406 #ifdef CONFIG_ADB 407 static int pmu_probe(void) 408 { 409 return pmu_state == uninitialized ? -ENODEV : 0; 410 } 411 412 static int pmu_init(void) 413 { 414 return pmu_state == uninitialized ? -ENODEV : 0; 415 } 416 #endif /* CONFIG_ADB */ 417 418 /* 419 * We can't wait until pmu_init gets called, that happens too late. 420 * It happens after IDE and SCSI initialization, which can take a few 421 * seconds, and by that time the PMU could have given up on us and 422 * turned us off. 423 * Thus this is called with arch_initcall rather than device_initcall. 424 */ 425 static int __init via_pmu_start(void) 426 { 427 unsigned int __maybe_unused irq; 428 429 if (pmu_state == uninitialized) 430 return -ENODEV; 431 432 batt_req.complete = 1; 433 434 #ifdef CONFIG_PPC_PMAC 435 irq = irq_of_parse_and_map(vias, 0); 436 if (!irq) { 437 printk(KERN_ERR "via-pmu: can't map interrupt\n"); 438 return -ENODEV; 439 } 440 /* We set IRQF_NO_SUSPEND because we don't want the interrupt 441 * to be disabled between the 2 passes of driver suspend, we 442 * control our own disabling for that one 443 */ 444 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND, 445 "VIA-PMU", (void *)0)) { 446 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq); 447 return -ENODEV; 448 } 449 450 if (pmu_kind == PMU_KEYLARGO_BASED) { 451 gpio_node = of_find_node_by_name(NULL, "extint-gpio1"); 452 if (gpio_node == NULL) 453 gpio_node = of_find_node_by_name(NULL, 454 "pmu-interrupt"); 455 if (gpio_node) 456 gpio_irq = irq_of_parse_and_map(gpio_node, 0); 457 458 if (gpio_irq) { 459 if (request_irq(gpio_irq, gpio1_interrupt, 460 IRQF_NO_SUSPEND, "GPIO1 ADB", 461 (void *)0)) 462 printk(KERN_ERR "pmu: can't get irq %d" 463 " (GPIO1)\n", gpio_irq); 464 else 465 gpio_irq_enabled = 1; 466 } 467 } 468 469 /* Enable interrupts */ 470 out_8(&via1[IER], IER_SET | SR_INT | CB1_INT); 471 #else 472 if (request_irq(IRQ_MAC_ADB_SR, via_pmu_interrupt, IRQF_NO_SUSPEND, 473 "VIA-PMU-SR", NULL)) { 474 pr_err("%s: couldn't get SR irq\n", __func__); 475 return -ENODEV; 476 } 477 if (request_irq(IRQ_MAC_ADB_CL, via_pmu_interrupt, IRQF_NO_SUSPEND, 478 "VIA-PMU-CL", NULL)) { 479 pr_err("%s: couldn't get CL irq\n", __func__); 480 free_irq(IRQ_MAC_ADB_SR, NULL); 481 return -ENODEV; 482 } 483 #endif /* !CONFIG_PPC_PMAC */ 484 485 pmu_fully_inited = 1; 486 487 /* Make sure PMU settle down before continuing. This is _very_ important 488 * since the IDE probe may shut interrupts down for quite a bit of time. If 489 * a PMU communication is pending while this happens, the PMU may timeout 490 * Not that on Core99 machines, the PMU keeps sending us environement 491 * messages, we should find a way to either fix IDE or make it call 492 * pmu_suspend() before masking interrupts. This can also happens while 493 * scolling with some fbdevs. 494 */ 495 do { 496 pmu_poll(); 497 } while (pmu_state != idle); 498 499 return 0; 500 } 501 502 arch_initcall(via_pmu_start); 503 504 /* 505 * This has to be done after pci_init, which is a subsys_initcall. 506 */ 507 static int __init via_pmu_dev_init(void) 508 { 509 if (pmu_state == uninitialized) 510 return -ENODEV; 511 512 #ifdef CONFIG_PMAC_BACKLIGHT 513 /* Initialize backlight */ 514 pmu_backlight_init(); 515 #endif 516 517 #ifdef CONFIG_PPC32 518 if (of_machine_is_compatible("AAPL,3400/2400") || 519 of_machine_is_compatible("AAPL,3500")) { 520 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 521 NULL, PMAC_MB_INFO_MODEL, 0); 522 pmu_battery_count = 1; 523 if (mb == PMAC_TYPE_COMET) 524 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET; 525 else 526 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER; 527 } else if (of_machine_is_compatible("AAPL,PowerBook1998") || 528 of_machine_is_compatible("PowerBook1,1")) { 529 pmu_battery_count = 2; 530 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 531 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 532 } else { 533 struct device_node* prim = 534 of_find_node_by_name(NULL, "power-mgt"); 535 const u32 *prim_info = NULL; 536 if (prim) 537 prim_info = of_get_property(prim, "prim-info", NULL); 538 if (prim_info) { 539 /* Other stuffs here yet unknown */ 540 pmu_battery_count = (prim_info[6] >> 16) & 0xff; 541 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 542 if (pmu_battery_count > 1) 543 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 544 } 545 of_node_put(prim); 546 } 547 #endif /* CONFIG_PPC32 */ 548 549 /* Create /proc/pmu */ 550 proc_pmu_root = proc_mkdir("pmu", NULL); 551 if (proc_pmu_root) { 552 long i; 553 554 for (i=0; i<pmu_battery_count; i++) { 555 char title[16]; 556 sprintf(title, "battery_%ld", i); 557 proc_pmu_batt[i] = proc_create_single_data(title, 0, 558 proc_pmu_root, pmu_battery_proc_show, 559 (void *)i); 560 } 561 562 proc_pmu_info = proc_create_single("info", 0, proc_pmu_root, 563 pmu_info_proc_show); 564 proc_pmu_irqstats = proc_create_single("interrupts", 0, 565 proc_pmu_root, pmu_irqstats_proc_show); 566 proc_pmu_options = proc_create("options", 0600, proc_pmu_root, 567 &pmu_options_proc_ops); 568 } 569 return 0; 570 } 571 572 device_initcall(via_pmu_dev_init); 573 574 static int 575 init_pmu(void) 576 { 577 int timeout; 578 struct adb_request req; 579 580 /* Negate TREQ. Set TACK to input and TREQ to output. */ 581 out_8(&via2[B], in_8(&via2[B]) | TREQ); 582 out_8(&via2[DIRB], (in_8(&via2[DIRB]) | TREQ) & ~TACK); 583 584 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 585 timeout = 100000; 586 while (!req.complete) { 587 if (--timeout < 0) { 588 printk(KERN_ERR "init_pmu: no response from PMU\n"); 589 return 0; 590 } 591 udelay(10); 592 pmu_poll(); 593 } 594 595 /* ack all pending interrupts */ 596 timeout = 100000; 597 interrupt_data[0][0] = 1; 598 while (interrupt_data[0][0] || pmu_state != idle) { 599 if (--timeout < 0) { 600 printk(KERN_ERR "init_pmu: timed out acking intrs\n"); 601 return 0; 602 } 603 if (pmu_state == idle) 604 adb_int_pending = 1; 605 via_pmu_interrupt(0, NULL); 606 udelay(10); 607 } 608 609 /* Tell PMU we are ready. */ 610 if (pmu_kind == PMU_KEYLARGO_BASED) { 611 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 612 while (!req.complete) 613 pmu_poll(); 614 } 615 616 /* Read PMU version */ 617 pmu_request(&req, NULL, 1, PMU_GET_VERSION); 618 pmu_wait_complete(&req); 619 if (req.reply_len > 0) 620 pmu_version = req.reply[0]; 621 622 /* Read server mode setting */ 623 if (pmu_kind == PMU_KEYLARGO_BASED) { 624 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, 625 PMU_PWR_GET_POWERUP_EVENTS); 626 pmu_wait_complete(&req); 627 if (req.reply_len == 2) { 628 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT) 629 option_server_mode = 1; 630 printk(KERN_INFO "via-pmu: Server Mode is %s\n", 631 option_server_mode ? "enabled" : "disabled"); 632 } 633 } 634 635 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n", 636 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version); 637 638 return 1; 639 } 640 641 int 642 pmu_get_model(void) 643 { 644 return pmu_kind; 645 } 646 647 static void pmu_set_server_mode(int server_mode) 648 { 649 struct adb_request req; 650 651 if (pmu_kind != PMU_KEYLARGO_BASED) 652 return; 653 654 option_server_mode = server_mode; 655 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS); 656 pmu_wait_complete(&req); 657 if (req.reply_len < 2) 658 return; 659 if (server_mode) 660 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 661 PMU_PWR_SET_POWERUP_EVENTS, 662 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 663 else 664 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 665 PMU_PWR_CLR_POWERUP_EVENTS, 666 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 667 pmu_wait_complete(&req); 668 } 669 670 /* This new version of the code for 2400/3400/3500 powerbooks 671 * is inspired from the implementation in gkrellm-pmu 672 */ 673 static void 674 done_battery_state_ohare(struct adb_request* req) 675 { 676 #ifdef CONFIG_PPC_PMAC 677 /* format: 678 * [0] : flags 679 * 0x01 : AC indicator 680 * 0x02 : charging 681 * 0x04 : battery exist 682 * 0x08 : 683 * 0x10 : 684 * 0x20 : full charged 685 * 0x40 : pcharge reset 686 * 0x80 : battery exist 687 * 688 * [1][2] : battery voltage 689 * [3] : CPU temperature 690 * [4] : battery temperature 691 * [5] : current 692 * [6][7] : pcharge 693 * --tkoba 694 */ 695 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER; 696 long pcharge, charge, vb, vmax, lmax; 697 long vmax_charging, vmax_charged; 698 long amperage, voltage, time, max; 699 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 700 NULL, PMAC_MB_INFO_MODEL, 0); 701 702 if (req->reply[0] & 0x01) 703 pmu_power_flags |= PMU_PWR_AC_PRESENT; 704 else 705 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 706 707 if (mb == PMAC_TYPE_COMET) { 708 vmax_charged = 189; 709 vmax_charging = 213; 710 lmax = 6500; 711 } else { 712 vmax_charged = 330; 713 vmax_charging = 330; 714 lmax = 6500; 715 } 716 vmax = vmax_charged; 717 718 /* If battery installed */ 719 if (req->reply[0] & 0x04) { 720 bat_flags |= PMU_BATT_PRESENT; 721 if (req->reply[0] & 0x02) 722 bat_flags |= PMU_BATT_CHARGING; 723 vb = (req->reply[1] << 8) | req->reply[2]; 724 voltage = (vb * 265 + 72665) / 10; 725 amperage = req->reply[5]; 726 if ((req->reply[0] & 0x01) == 0) { 727 if (amperage > 200) 728 vb += ((amperage - 200) * 15)/100; 729 } else if (req->reply[0] & 0x02) { 730 vb = (vb * 97) / 100; 731 vmax = vmax_charging; 732 } 733 charge = (100 * vb) / vmax; 734 if (req->reply[0] & 0x40) { 735 pcharge = (req->reply[6] << 8) + req->reply[7]; 736 if (pcharge > lmax) 737 pcharge = lmax; 738 pcharge *= 100; 739 pcharge = 100 - pcharge / lmax; 740 if (pcharge < charge) 741 charge = pcharge; 742 } 743 if (amperage > 0) 744 time = (charge * 16440) / amperage; 745 else 746 time = 0; 747 max = 100; 748 amperage = -amperage; 749 } else 750 charge = max = amperage = voltage = time = 0; 751 752 pmu_batteries[pmu_cur_battery].flags = bat_flags; 753 pmu_batteries[pmu_cur_battery].charge = charge; 754 pmu_batteries[pmu_cur_battery].max_charge = max; 755 pmu_batteries[pmu_cur_battery].amperage = amperage; 756 pmu_batteries[pmu_cur_battery].voltage = voltage; 757 pmu_batteries[pmu_cur_battery].time_remaining = time; 758 #endif /* CONFIG_PPC_PMAC */ 759 760 clear_bit(0, &async_req_locks); 761 } 762 763 static void 764 done_battery_state_smart(struct adb_request* req) 765 { 766 /* format: 767 * [0] : format of this structure (known: 3,4,5) 768 * [1] : flags 769 * 770 * format 3 & 4: 771 * 772 * [2] : charge 773 * [3] : max charge 774 * [4] : current 775 * [5] : voltage 776 * 777 * format 5: 778 * 779 * [2][3] : charge 780 * [4][5] : max charge 781 * [6][7] : current 782 * [8][9] : voltage 783 */ 784 785 unsigned int bat_flags = PMU_BATT_TYPE_SMART; 786 int amperage; 787 unsigned int capa, max, voltage; 788 789 if (req->reply[1] & 0x01) 790 pmu_power_flags |= PMU_PWR_AC_PRESENT; 791 else 792 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 793 794 795 capa = max = amperage = voltage = 0; 796 797 if (req->reply[1] & 0x04) { 798 bat_flags |= PMU_BATT_PRESENT; 799 switch(req->reply[0]) { 800 case 3: 801 case 4: capa = req->reply[2]; 802 max = req->reply[3]; 803 amperage = *((signed char *)&req->reply[4]); 804 voltage = req->reply[5]; 805 break; 806 case 5: capa = (req->reply[2] << 8) | req->reply[3]; 807 max = (req->reply[4] << 8) | req->reply[5]; 808 amperage = *((signed short *)&req->reply[6]); 809 voltage = (req->reply[8] << 8) | req->reply[9]; 810 break; 811 default: 812 pr_warn("pmu.c: unrecognized battery info, " 813 "len: %d, %4ph\n", req->reply_len, 814 req->reply); 815 break; 816 } 817 } 818 819 if ((req->reply[1] & 0x01) && (amperage > 0)) 820 bat_flags |= PMU_BATT_CHARGING; 821 822 pmu_batteries[pmu_cur_battery].flags = bat_flags; 823 pmu_batteries[pmu_cur_battery].charge = capa; 824 pmu_batteries[pmu_cur_battery].max_charge = max; 825 pmu_batteries[pmu_cur_battery].amperage = amperage; 826 pmu_batteries[pmu_cur_battery].voltage = voltage; 827 if (amperage) { 828 if ((req->reply[1] & 0x01) && (amperage > 0)) 829 pmu_batteries[pmu_cur_battery].time_remaining 830 = ((max-capa) * 3600) / amperage; 831 else 832 pmu_batteries[pmu_cur_battery].time_remaining 833 = (capa * 3600) / (-amperage); 834 } else 835 pmu_batteries[pmu_cur_battery].time_remaining = 0; 836 837 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count; 838 839 clear_bit(0, &async_req_locks); 840 } 841 842 static void 843 query_battery_state(void) 844 { 845 if (test_and_set_bit(0, &async_req_locks)) 846 return; 847 if (pmu_kind == PMU_OHARE_BASED) 848 pmu_request(&batt_req, done_battery_state_ohare, 849 1, PMU_BATTERY_STATE); 850 else 851 pmu_request(&batt_req, done_battery_state_smart, 852 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1); 853 } 854 855 static int pmu_info_proc_show(struct seq_file *m, void *v) 856 { 857 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION); 858 seq_printf(m, "PMU firmware version : %02x\n", pmu_version); 859 seq_printf(m, "AC Power : %d\n", 860 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0); 861 seq_printf(m, "Battery count : %d\n", pmu_battery_count); 862 863 return 0; 864 } 865 866 static int pmu_irqstats_proc_show(struct seq_file *m, void *v) 867 { 868 int i; 869 static const char *irq_names[NUM_IRQ_STATS] = { 870 "Unknown interrupt (type 0)", 871 "Unknown interrupt (type 1)", 872 "PC-Card eject button", 873 "Sound/Brightness button", 874 "ADB message", 875 "Battery state change", 876 "Environment interrupt", 877 "Tick timer", 878 "Ghost interrupt (zero len)", 879 "Empty interrupt (empty mask)", 880 "Max irqs in a row", 881 "Total CB1 triggered events", 882 "Total GPIO1 triggered events", 883 }; 884 885 for (i = 0; i < NUM_IRQ_STATS; i++) { 886 seq_printf(m, " %2u: %10u (%s)\n", 887 i, pmu_irq_stats[i], irq_names[i]); 888 } 889 return 0; 890 } 891 892 static int pmu_battery_proc_show(struct seq_file *m, void *v) 893 { 894 long batnum = (long)m->private; 895 896 seq_putc(m, '\n'); 897 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags); 898 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge); 899 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge); 900 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage); 901 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage); 902 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining); 903 return 0; 904 } 905 906 static int pmu_options_proc_show(struct seq_file *m, void *v) 907 { 908 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 909 if (pmu_kind == PMU_KEYLARGO_BASED && 910 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 911 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup); 912 #endif 913 if (pmu_kind == PMU_KEYLARGO_BASED) 914 seq_printf(m, "server_mode=%d\n", option_server_mode); 915 916 return 0; 917 } 918 919 static int pmu_options_proc_open(struct inode *inode, struct file *file) 920 { 921 return single_open(file, pmu_options_proc_show, NULL); 922 } 923 924 static ssize_t pmu_options_proc_write(struct file *file, 925 const char __user *buffer, size_t count, loff_t *pos) 926 { 927 char tmp[33]; 928 char *label, *val; 929 size_t fcount = count; 930 931 if (!count) 932 return -EINVAL; 933 if (count > 32) 934 count = 32; 935 if (copy_from_user(tmp, buffer, count)) 936 return -EFAULT; 937 tmp[count] = 0; 938 939 label = tmp; 940 while(*label == ' ') 941 label++; 942 val = label; 943 while(*val && (*val != '=')) { 944 if (*val == ' ') 945 *val = 0; 946 val++; 947 } 948 if ((*val) == 0) 949 return -EINVAL; 950 *(val++) = 0; 951 while(*val == ' ') 952 val++; 953 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 954 if (pmu_kind == PMU_KEYLARGO_BASED && 955 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 956 if (!strcmp(label, "lid_wakeup")) 957 option_lid_wakeup = ((*val) == '1'); 958 #endif 959 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) { 960 int new_value; 961 new_value = ((*val) == '1'); 962 if (new_value != option_server_mode) 963 pmu_set_server_mode(new_value); 964 } 965 return fcount; 966 } 967 968 static const struct proc_ops pmu_options_proc_ops = { 969 .proc_open = pmu_options_proc_open, 970 .proc_read = seq_read, 971 .proc_lseek = seq_lseek, 972 .proc_release = single_release, 973 .proc_write = pmu_options_proc_write, 974 }; 975 976 #ifdef CONFIG_ADB 977 /* Send an ADB command */ 978 static int pmu_send_request(struct adb_request *req, int sync) 979 { 980 int i, ret; 981 982 if (pmu_state == uninitialized || !pmu_fully_inited) { 983 req->complete = 1; 984 return -ENXIO; 985 } 986 987 ret = -EINVAL; 988 989 switch (req->data[0]) { 990 case PMU_PACKET: 991 for (i = 0; i < req->nbytes - 1; ++i) 992 req->data[i] = req->data[i+1]; 993 --req->nbytes; 994 if (pmu_data_len[req->data[0]][1] != 0) { 995 req->reply[0] = ADB_RET_OK; 996 req->reply_len = 1; 997 } else 998 req->reply_len = 0; 999 ret = pmu_queue_request(req); 1000 break; 1001 case CUDA_PACKET: 1002 switch (req->data[1]) { 1003 case CUDA_GET_TIME: 1004 if (req->nbytes != 2) 1005 break; 1006 req->data[0] = PMU_READ_RTC; 1007 req->nbytes = 1; 1008 req->reply_len = 3; 1009 req->reply[0] = CUDA_PACKET; 1010 req->reply[1] = 0; 1011 req->reply[2] = CUDA_GET_TIME; 1012 ret = pmu_queue_request(req); 1013 break; 1014 case CUDA_SET_TIME: 1015 if (req->nbytes != 6) 1016 break; 1017 req->data[0] = PMU_SET_RTC; 1018 req->nbytes = 5; 1019 for (i = 1; i <= 4; ++i) 1020 req->data[i] = req->data[i+1]; 1021 req->reply_len = 3; 1022 req->reply[0] = CUDA_PACKET; 1023 req->reply[1] = 0; 1024 req->reply[2] = CUDA_SET_TIME; 1025 ret = pmu_queue_request(req); 1026 break; 1027 } 1028 break; 1029 case ADB_PACKET: 1030 if (!pmu_has_adb) 1031 return -ENXIO; 1032 for (i = req->nbytes - 1; i > 1; --i) 1033 req->data[i+2] = req->data[i]; 1034 req->data[3] = req->nbytes - 2; 1035 req->data[2] = pmu_adb_flags; 1036 /*req->data[1] = req->data[1];*/ 1037 req->data[0] = PMU_ADB_CMD; 1038 req->nbytes += 2; 1039 req->reply_expected = 1; 1040 req->reply_len = 0; 1041 ret = pmu_queue_request(req); 1042 break; 1043 } 1044 if (ret) { 1045 req->complete = 1; 1046 return ret; 1047 } 1048 1049 if (sync) 1050 while (!req->complete) 1051 pmu_poll(); 1052 1053 return 0; 1054 } 1055 1056 /* Enable/disable autopolling */ 1057 static int __pmu_adb_autopoll(int devs) 1058 { 1059 struct adb_request req; 1060 1061 if (devs) { 1062 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86, 1063 adb_dev_map >> 8, adb_dev_map); 1064 pmu_adb_flags = 2; 1065 } else { 1066 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF); 1067 pmu_adb_flags = 0; 1068 } 1069 while (!req.complete) 1070 pmu_poll(); 1071 return 0; 1072 } 1073 1074 static int pmu_adb_autopoll(int devs) 1075 { 1076 if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb) 1077 return -ENXIO; 1078 1079 adb_dev_map = devs; 1080 return __pmu_adb_autopoll(devs); 1081 } 1082 1083 /* Reset the ADB bus */ 1084 static int pmu_adb_reset_bus(void) 1085 { 1086 struct adb_request req; 1087 int save_autopoll = adb_dev_map; 1088 1089 if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb) 1090 return -ENXIO; 1091 1092 /* anyone got a better idea?? */ 1093 __pmu_adb_autopoll(0); 1094 1095 req.nbytes = 4; 1096 req.done = NULL; 1097 req.data[0] = PMU_ADB_CMD; 1098 req.data[1] = ADB_BUSRESET; 1099 req.data[2] = 0; 1100 req.data[3] = 0; 1101 req.data[4] = 0; 1102 req.reply_len = 0; 1103 req.reply_expected = 1; 1104 if (pmu_queue_request(&req) != 0) { 1105 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n"); 1106 return -EIO; 1107 } 1108 pmu_wait_complete(&req); 1109 1110 if (save_autopoll != 0) 1111 __pmu_adb_autopoll(save_autopoll); 1112 1113 return 0; 1114 } 1115 #endif /* CONFIG_ADB */ 1116 1117 /* Construct and send a pmu request */ 1118 int 1119 pmu_request(struct adb_request *req, void (*done)(struct adb_request *), 1120 int nbytes, ...) 1121 { 1122 va_list list; 1123 int i; 1124 1125 if (pmu_state == uninitialized) 1126 return -ENXIO; 1127 1128 if (nbytes < 0 || nbytes > 32) { 1129 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes); 1130 req->complete = 1; 1131 return -EINVAL; 1132 } 1133 req->nbytes = nbytes; 1134 req->done = done; 1135 va_start(list, nbytes); 1136 for (i = 0; i < nbytes; ++i) 1137 req->data[i] = va_arg(list, int); 1138 va_end(list); 1139 req->reply_len = 0; 1140 req->reply_expected = 0; 1141 return pmu_queue_request(req); 1142 } 1143 1144 int 1145 pmu_queue_request(struct adb_request *req) 1146 { 1147 unsigned long flags; 1148 int nsend; 1149 1150 if (pmu_state == uninitialized) { 1151 req->complete = 1; 1152 return -ENXIO; 1153 } 1154 if (req->nbytes <= 0) { 1155 req->complete = 1; 1156 return 0; 1157 } 1158 nsend = pmu_data_len[req->data[0]][0]; 1159 if (nsend >= 0 && req->nbytes != nsend + 1) { 1160 req->complete = 1; 1161 return -EINVAL; 1162 } 1163 1164 req->next = NULL; 1165 req->sent = 0; 1166 req->complete = 0; 1167 1168 spin_lock_irqsave(&pmu_lock, flags); 1169 if (current_req) { 1170 last_req->next = req; 1171 last_req = req; 1172 } else { 1173 current_req = req; 1174 last_req = req; 1175 if (pmu_state == idle) 1176 pmu_start(); 1177 } 1178 spin_unlock_irqrestore(&pmu_lock, flags); 1179 1180 return 0; 1181 } 1182 1183 static inline void 1184 wait_for_ack(void) 1185 { 1186 /* Sightly increased the delay, I had one occurrence of the message 1187 * reported 1188 */ 1189 int timeout = 4000; 1190 while ((in_8(&via2[B]) & TACK) == 0) { 1191 if (--timeout < 0) { 1192 printk(KERN_ERR "PMU not responding (!ack)\n"); 1193 return; 1194 } 1195 udelay(10); 1196 } 1197 } 1198 1199 /* New PMU seems to be very sensitive to those timings, so we make sure 1200 * PCI is flushed immediately */ 1201 static inline void 1202 send_byte(int x) 1203 { 1204 out_8(&via1[ACR], in_8(&via1[ACR]) | SR_OUT | SR_EXT); 1205 out_8(&via1[SR], x); 1206 out_8(&via2[B], in_8(&via2[B]) & ~TREQ); /* assert TREQ */ 1207 (void)in_8(&via2[B]); 1208 } 1209 1210 static inline void 1211 recv_byte(void) 1212 { 1213 out_8(&via1[ACR], (in_8(&via1[ACR]) & ~SR_OUT) | SR_EXT); 1214 in_8(&via1[SR]); /* resets SR */ 1215 out_8(&via2[B], in_8(&via2[B]) & ~TREQ); 1216 (void)in_8(&via2[B]); 1217 } 1218 1219 static inline void 1220 pmu_done(struct adb_request *req) 1221 { 1222 void (*done)(struct adb_request *) = req->done; 1223 mb(); 1224 req->complete = 1; 1225 /* Here, we assume that if the request has a done member, the 1226 * struct request will survive to setting req->complete to 1 1227 */ 1228 if (done) 1229 (*done)(req); 1230 } 1231 1232 static void 1233 pmu_start(void) 1234 { 1235 struct adb_request *req; 1236 1237 /* assert pmu_state == idle */ 1238 /* get the packet to send */ 1239 req = current_req; 1240 if (!req || pmu_state != idle 1241 || (/*req->reply_expected && */req_awaiting_reply)) 1242 return; 1243 1244 pmu_state = sending; 1245 data_index = 1; 1246 data_len = pmu_data_len[req->data[0]][0]; 1247 1248 /* Sounds safer to make sure ACK is high before writing. This helped 1249 * kill a problem with ADB and some iBooks 1250 */ 1251 wait_for_ack(); 1252 /* set the shift register to shift out and send a byte */ 1253 send_byte(req->data[0]); 1254 } 1255 1256 void 1257 pmu_poll(void) 1258 { 1259 if (pmu_state == uninitialized) 1260 return; 1261 if (disable_poll) 1262 return; 1263 via_pmu_interrupt(0, NULL); 1264 } 1265 1266 void 1267 pmu_poll_adb(void) 1268 { 1269 if (pmu_state == uninitialized) 1270 return; 1271 if (disable_poll) 1272 return; 1273 /* Kicks ADB read when PMU is suspended */ 1274 adb_int_pending = 1; 1275 do { 1276 via_pmu_interrupt(0, NULL); 1277 } while (pmu_suspended && (adb_int_pending || pmu_state != idle 1278 || req_awaiting_reply)); 1279 } 1280 1281 void 1282 pmu_wait_complete(struct adb_request *req) 1283 { 1284 if (pmu_state == uninitialized) 1285 return; 1286 while((pmu_state != idle && pmu_state != locked) || !req->complete) 1287 via_pmu_interrupt(0, NULL); 1288 } 1289 1290 /* This function loops until the PMU is idle and prevents it from 1291 * anwsering to ADB interrupts. pmu_request can still be called. 1292 * This is done to avoid spurrious shutdowns when we know we'll have 1293 * interrupts switched off for a long time 1294 */ 1295 void 1296 pmu_suspend(void) 1297 { 1298 unsigned long flags; 1299 1300 if (pmu_state == uninitialized) 1301 return; 1302 1303 spin_lock_irqsave(&pmu_lock, flags); 1304 pmu_suspended++; 1305 if (pmu_suspended > 1) { 1306 spin_unlock_irqrestore(&pmu_lock, flags); 1307 return; 1308 } 1309 1310 do { 1311 spin_unlock_irqrestore(&pmu_lock, flags); 1312 if (req_awaiting_reply) 1313 adb_int_pending = 1; 1314 via_pmu_interrupt(0, NULL); 1315 spin_lock_irqsave(&pmu_lock, flags); 1316 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) { 1317 if (gpio_irq >= 0) 1318 disable_irq_nosync(gpio_irq); 1319 out_8(&via1[IER], CB1_INT | IER_CLR); 1320 spin_unlock_irqrestore(&pmu_lock, flags); 1321 break; 1322 } 1323 } while (1); 1324 } 1325 1326 void 1327 pmu_resume(void) 1328 { 1329 unsigned long flags; 1330 1331 if (pmu_state == uninitialized || pmu_suspended < 1) 1332 return; 1333 1334 spin_lock_irqsave(&pmu_lock, flags); 1335 pmu_suspended--; 1336 if (pmu_suspended > 0) { 1337 spin_unlock_irqrestore(&pmu_lock, flags); 1338 return; 1339 } 1340 adb_int_pending = 1; 1341 if (gpio_irq >= 0) 1342 enable_irq(gpio_irq); 1343 out_8(&via1[IER], CB1_INT | IER_SET); 1344 spin_unlock_irqrestore(&pmu_lock, flags); 1345 pmu_poll(); 1346 } 1347 1348 /* Interrupt data could be the result data from an ADB cmd */ 1349 static void 1350 pmu_handle_data(unsigned char *data, int len) 1351 { 1352 unsigned char ints; 1353 int idx; 1354 int i = 0; 1355 1356 asleep = 0; 1357 if (drop_interrupts || len < 1) { 1358 adb_int_pending = 0; 1359 pmu_irq_stats[8]++; 1360 return; 1361 } 1362 1363 /* Get PMU interrupt mask */ 1364 ints = data[0]; 1365 1366 /* Record zero interrupts for stats */ 1367 if (ints == 0) 1368 pmu_irq_stats[9]++; 1369 1370 /* Hack to deal with ADB autopoll flag */ 1371 if (ints & PMU_INT_ADB) 1372 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL); 1373 1374 next: 1375 if (ints == 0) { 1376 if (i > pmu_irq_stats[10]) 1377 pmu_irq_stats[10] = i; 1378 return; 1379 } 1380 i++; 1381 1382 idx = ffs(ints) - 1; 1383 ints &= ~BIT(idx); 1384 1385 pmu_irq_stats[idx]++; 1386 1387 /* Note: for some reason, we get an interrupt with len=1, 1388 * data[0]==0 after each normal ADB interrupt, at least 1389 * on the Pismo. Still investigating... --BenH 1390 */ 1391 switch (BIT(idx)) { 1392 case PMU_INT_ADB: 1393 if ((data[0] & PMU_INT_ADB_AUTO) == 0) { 1394 struct adb_request *req = req_awaiting_reply; 1395 if (!req) { 1396 printk(KERN_ERR "PMU: extra ADB reply\n"); 1397 return; 1398 } 1399 req_awaiting_reply = NULL; 1400 if (len <= 2) 1401 req->reply_len = 0; 1402 else { 1403 memcpy(req->reply, data + 1, len - 1); 1404 req->reply_len = len - 1; 1405 } 1406 pmu_done(req); 1407 } else { 1408 #ifdef CONFIG_XMON 1409 if (len == 4 && data[1] == 0x2c) { 1410 extern int xmon_wants_key, xmon_adb_keycode; 1411 if (xmon_wants_key) { 1412 xmon_adb_keycode = data[2]; 1413 return; 1414 } 1415 } 1416 #endif /* CONFIG_XMON */ 1417 #ifdef CONFIG_ADB 1418 /* 1419 * XXX On the [23]400 the PMU gives us an up 1420 * event for keycodes 0x74 or 0x75 when the PC 1421 * card eject buttons are released, so we 1422 * ignore those events. 1423 */ 1424 if (!(pmu_kind == PMU_OHARE_BASED && len == 4 1425 && data[1] == 0x2c && data[3] == 0xff 1426 && (data[2] & ~1) == 0xf4)) 1427 adb_input(data+1, len-1, 1); 1428 #endif /* CONFIG_ADB */ 1429 } 1430 break; 1431 1432 /* Sound/brightness button pressed */ 1433 case PMU_INT_SNDBRT: 1434 #ifdef CONFIG_PMAC_BACKLIGHT 1435 if (len == 3) 1436 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4); 1437 #endif 1438 break; 1439 1440 /* Tick interrupt */ 1441 case PMU_INT_TICK: 1442 /* Environment or tick interrupt, query batteries */ 1443 if (pmu_battery_count) { 1444 if ((--query_batt_timer) == 0) { 1445 query_battery_state(); 1446 query_batt_timer = BATTERY_POLLING_COUNT; 1447 } 1448 } 1449 break; 1450 1451 case PMU_INT_ENVIRONMENT: 1452 if (pmu_battery_count) 1453 query_battery_state(); 1454 pmu_pass_intr(data, len); 1455 /* len == 6 is probably a bad check. But how do I 1456 * know what PMU versions send what events here? */ 1457 if (IS_ENABLED(CONFIG_ADB_PMU_EVENT) && len == 6) { 1458 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8)); 1459 via_pmu_event(PMU_EVT_LID, data[1]&1); 1460 } 1461 break; 1462 1463 default: 1464 pmu_pass_intr(data, len); 1465 } 1466 goto next; 1467 } 1468 1469 static struct adb_request* 1470 pmu_sr_intr(void) 1471 { 1472 struct adb_request *req; 1473 int bite = 0; 1474 1475 if (in_8(&via2[B]) & TREQ) { 1476 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via2[B])); 1477 return NULL; 1478 } 1479 /* The ack may not yet be low when we get the interrupt */ 1480 while ((in_8(&via2[B]) & TACK) != 0) 1481 ; 1482 1483 /* if reading grab the byte, and reset the interrupt */ 1484 if (pmu_state == reading || pmu_state == reading_intr) 1485 bite = in_8(&via1[SR]); 1486 1487 /* reset TREQ and wait for TACK to go high */ 1488 out_8(&via2[B], in_8(&via2[B]) | TREQ); 1489 wait_for_ack(); 1490 1491 switch (pmu_state) { 1492 case sending: 1493 req = current_req; 1494 if (data_len < 0) { 1495 data_len = req->nbytes - 1; 1496 send_byte(data_len); 1497 break; 1498 } 1499 if (data_index <= data_len) { 1500 send_byte(req->data[data_index++]); 1501 break; 1502 } 1503 req->sent = 1; 1504 data_len = pmu_data_len[req->data[0]][1]; 1505 if (data_len == 0) { 1506 pmu_state = idle; 1507 current_req = req->next; 1508 if (req->reply_expected) 1509 req_awaiting_reply = req; 1510 else 1511 return req; 1512 } else { 1513 pmu_state = reading; 1514 data_index = 0; 1515 reply_ptr = req->reply + req->reply_len; 1516 recv_byte(); 1517 } 1518 break; 1519 1520 case intack: 1521 data_index = 0; 1522 data_len = -1; 1523 pmu_state = reading_intr; 1524 reply_ptr = interrupt_data[int_data_last]; 1525 recv_byte(); 1526 if (gpio_irq >= 0 && !gpio_irq_enabled) { 1527 enable_irq(gpio_irq); 1528 gpio_irq_enabled = 1; 1529 } 1530 break; 1531 1532 case reading: 1533 case reading_intr: 1534 if (data_len == -1) { 1535 data_len = bite; 1536 if (bite > 32) 1537 printk(KERN_ERR "PMU: bad reply len %d\n", bite); 1538 } else if (data_index < 32) { 1539 reply_ptr[data_index++] = bite; 1540 } 1541 if (data_index < data_len) { 1542 recv_byte(); 1543 break; 1544 } 1545 1546 if (pmu_state == reading_intr) { 1547 pmu_state = idle; 1548 int_data_state[int_data_last] = int_data_ready; 1549 interrupt_data_len[int_data_last] = data_len; 1550 } else { 1551 req = current_req; 1552 /* 1553 * For PMU sleep and freq change requests, we lock the 1554 * PMU until it's explicitly unlocked. This avoids any 1555 * spurrious event polling getting in 1556 */ 1557 current_req = req->next; 1558 req->reply_len += data_index; 1559 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED) 1560 pmu_state = locked; 1561 else 1562 pmu_state = idle; 1563 return req; 1564 } 1565 break; 1566 1567 default: 1568 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n", 1569 pmu_state); 1570 } 1571 return NULL; 1572 } 1573 1574 static irqreturn_t 1575 via_pmu_interrupt(int irq, void *arg) 1576 { 1577 unsigned long flags; 1578 int intr; 1579 int nloop = 0; 1580 int int_data = -1; 1581 struct adb_request *req = NULL; 1582 int handled = 0; 1583 1584 /* This is a bit brutal, we can probably do better */ 1585 spin_lock_irqsave(&pmu_lock, flags); 1586 ++disable_poll; 1587 1588 for (;;) { 1589 /* On 68k Macs, VIA interrupts are dispatched individually. 1590 * Unless we are polling, the relevant IRQ flag has already 1591 * been cleared. 1592 */ 1593 intr = 0; 1594 if (IS_ENABLED(CONFIG_PPC_PMAC) || !irq) { 1595 intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT); 1596 out_8(&via1[IFR], intr); 1597 } 1598 #ifndef CONFIG_PPC_PMAC 1599 switch (irq) { 1600 case IRQ_MAC_ADB_CL: 1601 intr = CB1_INT; 1602 break; 1603 case IRQ_MAC_ADB_SR: 1604 intr = SR_INT; 1605 break; 1606 } 1607 #endif 1608 if (intr == 0) 1609 break; 1610 handled = 1; 1611 if (++nloop > 1000) { 1612 printk(KERN_DEBUG "PMU: stuck in intr loop, " 1613 "intr=%x, ier=%x pmu_state=%d\n", 1614 intr, in_8(&via1[IER]), pmu_state); 1615 break; 1616 } 1617 if (intr & CB1_INT) { 1618 adb_int_pending = 1; 1619 pmu_irq_stats[11]++; 1620 } 1621 if (intr & SR_INT) { 1622 req = pmu_sr_intr(); 1623 if (req) 1624 break; 1625 } 1626 #ifndef CONFIG_PPC_PMAC 1627 break; 1628 #endif 1629 } 1630 1631 recheck: 1632 if (pmu_state == idle) { 1633 if (adb_int_pending) { 1634 if (int_data_state[0] == int_data_empty) 1635 int_data_last = 0; 1636 else if (int_data_state[1] == int_data_empty) 1637 int_data_last = 1; 1638 else 1639 goto no_free_slot; 1640 pmu_state = intack; 1641 int_data_state[int_data_last] = int_data_fill; 1642 /* Sounds safer to make sure ACK is high before writing. 1643 * This helped kill a problem with ADB and some iBooks 1644 */ 1645 wait_for_ack(); 1646 send_byte(PMU_INT_ACK); 1647 adb_int_pending = 0; 1648 } else if (current_req) 1649 pmu_start(); 1650 } 1651 no_free_slot: 1652 /* Mark the oldest buffer for flushing */ 1653 if (int_data_state[!int_data_last] == int_data_ready) { 1654 int_data_state[!int_data_last] = int_data_flush; 1655 int_data = !int_data_last; 1656 } else if (int_data_state[int_data_last] == int_data_ready) { 1657 int_data_state[int_data_last] = int_data_flush; 1658 int_data = int_data_last; 1659 } 1660 --disable_poll; 1661 spin_unlock_irqrestore(&pmu_lock, flags); 1662 1663 /* Deal with completed PMU requests outside of the lock */ 1664 if (req) { 1665 pmu_done(req); 1666 req = NULL; 1667 } 1668 1669 /* Deal with interrupt datas outside of the lock */ 1670 if (int_data >= 0) { 1671 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]); 1672 spin_lock_irqsave(&pmu_lock, flags); 1673 ++disable_poll; 1674 int_data_state[int_data] = int_data_empty; 1675 int_data = -1; 1676 goto recheck; 1677 } 1678 1679 return IRQ_RETVAL(handled); 1680 } 1681 1682 void 1683 pmu_unlock(void) 1684 { 1685 unsigned long flags; 1686 1687 spin_lock_irqsave(&pmu_lock, flags); 1688 if (pmu_state == locked) 1689 pmu_state = idle; 1690 adb_int_pending = 1; 1691 spin_unlock_irqrestore(&pmu_lock, flags); 1692 } 1693 1694 1695 static __maybe_unused irqreturn_t 1696 gpio1_interrupt(int irq, void *arg) 1697 { 1698 unsigned long flags; 1699 1700 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) { 1701 spin_lock_irqsave(&pmu_lock, flags); 1702 if (gpio_irq_enabled > 0) { 1703 disable_irq_nosync(gpio_irq); 1704 gpio_irq_enabled = 0; 1705 } 1706 pmu_irq_stats[12]++; 1707 adb_int_pending = 1; 1708 spin_unlock_irqrestore(&pmu_lock, flags); 1709 via_pmu_interrupt(0, NULL); 1710 return IRQ_HANDLED; 1711 } 1712 return IRQ_NONE; 1713 } 1714 1715 void 1716 pmu_enable_irled(int on) 1717 { 1718 struct adb_request req; 1719 1720 if (pmu_state == uninitialized) 1721 return ; 1722 if (pmu_kind == PMU_KEYLARGO_BASED) 1723 return ; 1724 1725 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED | 1726 (on ? PMU_POW_ON : PMU_POW_OFF)); 1727 pmu_wait_complete(&req); 1728 } 1729 1730 /* Offset between Unix time (1970-based) and Mac time (1904-based) */ 1731 #define RTC_OFFSET 2082844800 1732 1733 time64_t pmu_get_time(void) 1734 { 1735 struct adb_request req; 1736 u32 now; 1737 1738 if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0) 1739 return 0; 1740 pmu_wait_complete(&req); 1741 if (req.reply_len != 4) 1742 pr_err("%s: got %d byte reply\n", __func__, req.reply_len); 1743 now = (req.reply[0] << 24) + (req.reply[1] << 16) + 1744 (req.reply[2] << 8) + req.reply[3]; 1745 return (time64_t)now - RTC_OFFSET; 1746 } 1747 1748 int pmu_set_rtc_time(struct rtc_time *tm) 1749 { 1750 u32 now; 1751 struct adb_request req; 1752 1753 now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET); 1754 if (pmu_request(&req, NULL, 5, PMU_SET_RTC, 1755 now >> 24, now >> 16, now >> 8, now) < 0) 1756 return -ENXIO; 1757 pmu_wait_complete(&req); 1758 if (req.reply_len != 0) 1759 pr_err("%s: got %d byte reply\n", __func__, req.reply_len); 1760 return 0; 1761 } 1762 1763 void 1764 pmu_restart(void) 1765 { 1766 struct adb_request req; 1767 1768 if (pmu_state == uninitialized) 1769 return; 1770 1771 local_irq_disable(); 1772 1773 drop_interrupts = 1; 1774 1775 if (pmu_kind != PMU_KEYLARGO_BASED) { 1776 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1777 PMU_INT_TICK ); 1778 while(!req.complete) 1779 pmu_poll(); 1780 } 1781 1782 pmu_request(&req, NULL, 1, PMU_RESET); 1783 pmu_wait_complete(&req); 1784 for (;;) 1785 ; 1786 } 1787 1788 void 1789 pmu_shutdown(void) 1790 { 1791 struct adb_request req; 1792 1793 if (pmu_state == uninitialized) 1794 return; 1795 1796 local_irq_disable(); 1797 1798 drop_interrupts = 1; 1799 1800 if (pmu_kind != PMU_KEYLARGO_BASED) { 1801 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1802 PMU_INT_TICK ); 1803 pmu_wait_complete(&req); 1804 } else { 1805 /* Disable server mode on shutdown or we'll just 1806 * wake up again 1807 */ 1808 pmu_set_server_mode(0); 1809 } 1810 1811 pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 1812 'M', 'A', 'T', 'T'); 1813 pmu_wait_complete(&req); 1814 for (;;) 1815 ; 1816 } 1817 1818 int 1819 pmu_present(void) 1820 { 1821 return pmu_state != uninitialized; 1822 } 1823 1824 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 1825 /* 1826 * Put the powerbook to sleep. 1827 */ 1828 1829 static u32 save_via[8]; 1830 static int __fake_sleep; 1831 1832 static void 1833 save_via_state(void) 1834 { 1835 save_via[0] = in_8(&via1[ANH]); 1836 save_via[1] = in_8(&via1[DIRA]); 1837 save_via[2] = in_8(&via1[B]); 1838 save_via[3] = in_8(&via1[DIRB]); 1839 save_via[4] = in_8(&via1[PCR]); 1840 save_via[5] = in_8(&via1[ACR]); 1841 save_via[6] = in_8(&via1[T1CL]); 1842 save_via[7] = in_8(&via1[T1CH]); 1843 } 1844 static void 1845 restore_via_state(void) 1846 { 1847 out_8(&via1[ANH], save_via[0]); 1848 out_8(&via1[DIRA], save_via[1]); 1849 out_8(&via1[B], save_via[2]); 1850 out_8(&via1[DIRB], save_via[3]); 1851 out_8(&via1[PCR], save_via[4]); 1852 out_8(&via1[ACR], save_via[5]); 1853 out_8(&via1[T1CL], save_via[6]); 1854 out_8(&via1[T1CH], save_via[7]); 1855 out_8(&via1[IER], IER_CLR | 0x7f); /* disable all intrs */ 1856 out_8(&via1[IFR], 0x7f); /* clear IFR */ 1857 out_8(&via1[IER], IER_SET | SR_INT | CB1_INT); 1858 } 1859 1860 #define GRACKLE_PM (1<<7) 1861 #define GRACKLE_DOZE (1<<5) 1862 #define GRACKLE_NAP (1<<4) 1863 #define GRACKLE_SLEEP (1<<3) 1864 1865 static int powerbook_sleep_grackle(void) 1866 { 1867 unsigned long save_l2cr; 1868 unsigned short pmcr1; 1869 struct adb_request req; 1870 struct pci_dev *grackle; 1871 1872 grackle = pci_get_domain_bus_and_slot(0, 0, 0); 1873 if (!grackle) 1874 return -ENODEV; 1875 1876 /* Turn off various things. Darwin does some retry tests here... */ 1877 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE); 1878 pmu_wait_complete(&req); 1879 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1880 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY); 1881 pmu_wait_complete(&req); 1882 1883 /* For 750, save backside cache setting and disable it */ 1884 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 1885 1886 if (!__fake_sleep) { 1887 /* Ask the PMU to put us to sleep */ 1888 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1889 pmu_wait_complete(&req); 1890 } 1891 1892 /* The VIA is supposed not to be restored correctly*/ 1893 save_via_state(); 1894 /* We shut down some HW */ 1895 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 1896 1897 pci_read_config_word(grackle, 0x70, &pmcr1); 1898 /* Apparently, MacOS uses NAP mode for Grackle ??? */ 1899 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 1900 pmcr1 |= GRACKLE_PM|GRACKLE_NAP; 1901 pci_write_config_word(grackle, 0x70, pmcr1); 1902 1903 /* Call low-level ASM sleep handler */ 1904 if (__fake_sleep) 1905 mdelay(5000); 1906 else 1907 low_sleep_handler(); 1908 1909 /* We're awake again, stop grackle PM */ 1910 pci_read_config_word(grackle, 0x70, &pmcr1); 1911 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 1912 pci_write_config_word(grackle, 0x70, pmcr1); 1913 1914 pci_dev_put(grackle); 1915 1916 /* Make sure the PMU is idle */ 1917 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 1918 restore_via_state(); 1919 1920 /* Restore L2 cache */ 1921 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 1922 _set_L2CR(save_l2cr); 1923 1924 /* Restore userland MMU context */ 1925 switch_mmu_context(NULL, current->active_mm, NULL); 1926 1927 /* Power things up */ 1928 pmu_unlock(); 1929 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1930 pmu_wait_complete(&req); 1931 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, 1932 PMU_POW0_ON|PMU_POW0_HARD_DRIVE); 1933 pmu_wait_complete(&req); 1934 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1935 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY); 1936 pmu_wait_complete(&req); 1937 1938 return 0; 1939 } 1940 1941 static int 1942 powerbook_sleep_Core99(void) 1943 { 1944 unsigned long save_l2cr; 1945 unsigned long save_l3cr; 1946 struct adb_request req; 1947 1948 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) { 1949 printk(KERN_ERR "Sleep mode not supported on this machine\n"); 1950 return -ENOSYS; 1951 } 1952 1953 if (num_online_cpus() > 1 || cpu_is_offline(0)) 1954 return -EAGAIN; 1955 1956 /* Stop environment and ADB interrupts */ 1957 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 1958 pmu_wait_complete(&req); 1959 1960 /* Tell PMU what events will wake us up */ 1961 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS, 1962 0xff, 0xff); 1963 pmu_wait_complete(&req); 1964 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS, 1965 0, PMU_PWR_WAKEUP_KEY | 1966 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0)); 1967 pmu_wait_complete(&req); 1968 1969 /* Save the state of the L2 and L3 caches */ 1970 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */ 1971 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 1972 1973 if (!__fake_sleep) { 1974 /* Ask the PMU to put us to sleep */ 1975 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1976 pmu_wait_complete(&req); 1977 } 1978 1979 /* The VIA is supposed not to be restored correctly*/ 1980 save_via_state(); 1981 1982 /* Shut down various ASICs. There's a chance that we can no longer 1983 * talk to the PMU after this, so I moved it to _after_ sending the 1984 * sleep command to it. Still need to be checked. 1985 */ 1986 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 1987 1988 /* Call low-level ASM sleep handler */ 1989 if (__fake_sleep) 1990 mdelay(5000); 1991 else 1992 low_sleep_handler(); 1993 1994 /* Restore Apple core ASICs state */ 1995 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 1996 1997 /* Restore VIA */ 1998 restore_via_state(); 1999 2000 /* tweak LPJ before cpufreq is there */ 2001 loops_per_jiffy *= 2; 2002 2003 /* Restore video */ 2004 pmac_call_early_video_resume(); 2005 2006 /* Restore L2 cache */ 2007 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2008 _set_L2CR(save_l2cr); 2009 /* Restore L3 cache */ 2010 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0) 2011 _set_L3CR(save_l3cr); 2012 2013 /* Restore userland MMU context */ 2014 switch_mmu_context(NULL, current->active_mm, NULL); 2015 2016 /* Tell PMU we are ready */ 2017 pmu_unlock(); 2018 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2019 pmu_wait_complete(&req); 2020 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2021 pmu_wait_complete(&req); 2022 2023 /* Restore LPJ, cpufreq will adjust the cpu frequency */ 2024 loops_per_jiffy /= 2; 2025 2026 return 0; 2027 } 2028 2029 #define PB3400_MEM_CTRL 0xf8000000 2030 #define PB3400_MEM_CTRL_SLEEP 0x70 2031 2032 static void __iomem *pb3400_mem_ctrl; 2033 2034 static void powerbook_sleep_init_3400(void) 2035 { 2036 /* map in the memory controller registers */ 2037 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100); 2038 if (pb3400_mem_ctrl == NULL) 2039 printk(KERN_WARNING "ioremap failed: sleep won't be possible"); 2040 } 2041 2042 static int powerbook_sleep_3400(void) 2043 { 2044 int i, x; 2045 unsigned int hid0; 2046 unsigned long msr; 2047 struct adb_request sleep_req; 2048 unsigned int __iomem *mem_ctrl_sleep; 2049 2050 if (pb3400_mem_ctrl == NULL) 2051 return -ENOMEM; 2052 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP; 2053 2054 /* Set the memory controller to keep the memory refreshed 2055 while we're asleep */ 2056 for (i = 0x403f; i >= 0x4000; --i) { 2057 out_be32(mem_ctrl_sleep, i); 2058 do { 2059 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff; 2060 } while (x == 0); 2061 if (x >= 0x100) 2062 break; 2063 } 2064 2065 /* Ask the PMU to put us to sleep */ 2066 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2067 pmu_wait_complete(&sleep_req); 2068 pmu_unlock(); 2069 2070 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 2071 2072 asleep = 1; 2073 2074 /* Put the CPU into sleep mode */ 2075 hid0 = mfspr(SPRN_HID0); 2076 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP; 2077 mtspr(SPRN_HID0, hid0); 2078 local_irq_enable(); 2079 msr = mfmsr() | MSR_POW; 2080 while (asleep) { 2081 mb(); 2082 mtmsr(msr); 2083 isync(); 2084 } 2085 local_irq_disable(); 2086 2087 /* OK, we're awake again, start restoring things */ 2088 out_be32(mem_ctrl_sleep, 0x3f); 2089 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 2090 2091 return 0; 2092 } 2093 2094 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2095 2096 /* 2097 * Support for /dev/pmu device 2098 */ 2099 #define RB_SIZE 0x10 2100 struct pmu_private { 2101 struct list_head list; 2102 int rb_get; 2103 int rb_put; 2104 struct rb_entry { 2105 unsigned short len; 2106 unsigned char data[16]; 2107 } rb_buf[RB_SIZE]; 2108 wait_queue_head_t wait; 2109 spinlock_t lock; 2110 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2111 int backlight_locker; 2112 #endif 2113 }; 2114 2115 static LIST_HEAD(all_pmu_pvt); 2116 static DEFINE_SPINLOCK(all_pvt_lock); 2117 2118 static void 2119 pmu_pass_intr(unsigned char *data, int len) 2120 { 2121 struct pmu_private *pp; 2122 struct list_head *list; 2123 int i; 2124 unsigned long flags; 2125 2126 if (len > sizeof(pp->rb_buf[0].data)) 2127 len = sizeof(pp->rb_buf[0].data); 2128 spin_lock_irqsave(&all_pvt_lock, flags); 2129 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) { 2130 pp = list_entry(list, struct pmu_private, list); 2131 spin_lock(&pp->lock); 2132 i = pp->rb_put + 1; 2133 if (i >= RB_SIZE) 2134 i = 0; 2135 if (i != pp->rb_get) { 2136 struct rb_entry *rp = &pp->rb_buf[pp->rb_put]; 2137 rp->len = len; 2138 memcpy(rp->data, data, len); 2139 pp->rb_put = i; 2140 wake_up_interruptible(&pp->wait); 2141 } 2142 spin_unlock(&pp->lock); 2143 } 2144 spin_unlock_irqrestore(&all_pvt_lock, flags); 2145 } 2146 2147 static int 2148 pmu_open(struct inode *inode, struct file *file) 2149 { 2150 struct pmu_private *pp; 2151 unsigned long flags; 2152 2153 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL); 2154 if (!pp) 2155 return -ENOMEM; 2156 pp->rb_get = pp->rb_put = 0; 2157 spin_lock_init(&pp->lock); 2158 init_waitqueue_head(&pp->wait); 2159 mutex_lock(&pmu_info_proc_mutex); 2160 spin_lock_irqsave(&all_pvt_lock, flags); 2161 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2162 pp->backlight_locker = 0; 2163 #endif 2164 list_add(&pp->list, &all_pmu_pvt); 2165 spin_unlock_irqrestore(&all_pvt_lock, flags); 2166 file->private_data = pp; 2167 mutex_unlock(&pmu_info_proc_mutex); 2168 return 0; 2169 } 2170 2171 static ssize_t 2172 pmu_read(struct file *file, char __user *buf, 2173 size_t count, loff_t *ppos) 2174 { 2175 struct pmu_private *pp = file->private_data; 2176 DECLARE_WAITQUEUE(wait, current); 2177 unsigned long flags; 2178 int ret = 0; 2179 2180 if (count < 1 || !pp) 2181 return -EINVAL; 2182 2183 spin_lock_irqsave(&pp->lock, flags); 2184 add_wait_queue(&pp->wait, &wait); 2185 set_current_state(TASK_INTERRUPTIBLE); 2186 2187 for (;;) { 2188 ret = -EAGAIN; 2189 if (pp->rb_get != pp->rb_put) { 2190 int i = pp->rb_get; 2191 struct rb_entry *rp = &pp->rb_buf[i]; 2192 ret = rp->len; 2193 spin_unlock_irqrestore(&pp->lock, flags); 2194 if (ret > count) 2195 ret = count; 2196 if (ret > 0 && copy_to_user(buf, rp->data, ret)) 2197 ret = -EFAULT; 2198 if (++i >= RB_SIZE) 2199 i = 0; 2200 spin_lock_irqsave(&pp->lock, flags); 2201 pp->rb_get = i; 2202 } 2203 if (ret >= 0) 2204 break; 2205 if (file->f_flags & O_NONBLOCK) 2206 break; 2207 ret = -ERESTARTSYS; 2208 if (signal_pending(current)) 2209 break; 2210 spin_unlock_irqrestore(&pp->lock, flags); 2211 schedule(); 2212 spin_lock_irqsave(&pp->lock, flags); 2213 } 2214 __set_current_state(TASK_RUNNING); 2215 remove_wait_queue(&pp->wait, &wait); 2216 spin_unlock_irqrestore(&pp->lock, flags); 2217 2218 return ret; 2219 } 2220 2221 static ssize_t 2222 pmu_write(struct file *file, const char __user *buf, 2223 size_t count, loff_t *ppos) 2224 { 2225 return 0; 2226 } 2227 2228 static __poll_t 2229 pmu_fpoll(struct file *filp, poll_table *wait) 2230 { 2231 struct pmu_private *pp = filp->private_data; 2232 __poll_t mask = 0; 2233 unsigned long flags; 2234 2235 if (!pp) 2236 return 0; 2237 poll_wait(filp, &pp->wait, wait); 2238 spin_lock_irqsave(&pp->lock, flags); 2239 if (pp->rb_get != pp->rb_put) 2240 mask |= EPOLLIN; 2241 spin_unlock_irqrestore(&pp->lock, flags); 2242 return mask; 2243 } 2244 2245 static int 2246 pmu_release(struct inode *inode, struct file *file) 2247 { 2248 struct pmu_private *pp = file->private_data; 2249 unsigned long flags; 2250 2251 if (pp) { 2252 file->private_data = NULL; 2253 spin_lock_irqsave(&all_pvt_lock, flags); 2254 list_del(&pp->list); 2255 spin_unlock_irqrestore(&all_pvt_lock, flags); 2256 2257 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2258 if (pp->backlight_locker) 2259 pmac_backlight_enable(); 2260 #endif 2261 2262 kfree(pp); 2263 } 2264 return 0; 2265 } 2266 2267 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 2268 static void pmac_suspend_disable_irqs(void) 2269 { 2270 /* Call platform functions marked "on sleep" */ 2271 pmac_pfunc_i2c_suspend(); 2272 pmac_pfunc_base_suspend(); 2273 } 2274 2275 static int powerbook_sleep(suspend_state_t state) 2276 { 2277 int error = 0; 2278 2279 /* Wait for completion of async requests */ 2280 while (!batt_req.complete) 2281 pmu_poll(); 2282 2283 /* Giveup the lazy FPU & vec so we don't have to back them 2284 * up from the low level code 2285 */ 2286 enable_kernel_fp(); 2287 2288 #ifdef CONFIG_ALTIVEC 2289 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 2290 enable_kernel_altivec(); 2291 #endif /* CONFIG_ALTIVEC */ 2292 2293 switch (pmu_kind) { 2294 case PMU_OHARE_BASED: 2295 error = powerbook_sleep_3400(); 2296 break; 2297 case PMU_HEATHROW_BASED: 2298 case PMU_PADDINGTON_BASED: 2299 error = powerbook_sleep_grackle(); 2300 break; 2301 case PMU_KEYLARGO_BASED: 2302 error = powerbook_sleep_Core99(); 2303 break; 2304 default: 2305 return -ENOSYS; 2306 } 2307 2308 if (error) 2309 return error; 2310 2311 mdelay(100); 2312 2313 return 0; 2314 } 2315 2316 static void pmac_suspend_enable_irqs(void) 2317 { 2318 /* Force a poll of ADB interrupts */ 2319 adb_int_pending = 1; 2320 via_pmu_interrupt(0, NULL); 2321 2322 mdelay(10); 2323 2324 /* Call platform functions marked "on wake" */ 2325 pmac_pfunc_base_resume(); 2326 pmac_pfunc_i2c_resume(); 2327 } 2328 2329 static int pmu_sleep_valid(suspend_state_t state) 2330 { 2331 return state == PM_SUSPEND_MEM 2332 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0); 2333 } 2334 2335 static const struct platform_suspend_ops pmu_pm_ops = { 2336 .enter = powerbook_sleep, 2337 .valid = pmu_sleep_valid, 2338 }; 2339 2340 static int register_pmu_pm_ops(void) 2341 { 2342 if (pmu_kind == PMU_OHARE_BASED) 2343 powerbook_sleep_init_3400(); 2344 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs; 2345 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs; 2346 suspend_set_ops(&pmu_pm_ops); 2347 2348 return 0; 2349 } 2350 2351 device_initcall(register_pmu_pm_ops); 2352 #endif 2353 2354 static int pmu_ioctl(struct file *filp, 2355 u_int cmd, u_long arg) 2356 { 2357 __u32 __user *argp = (__u32 __user *)arg; 2358 int error = -EINVAL; 2359 2360 switch (cmd) { 2361 #ifdef CONFIG_PPC_PMAC 2362 case PMU_IOC_SLEEP: 2363 if (!capable(CAP_SYS_ADMIN)) 2364 return -EACCES; 2365 return pm_suspend(PM_SUSPEND_MEM); 2366 case PMU_IOC_CAN_SLEEP: 2367 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0) 2368 return put_user(0, argp); 2369 else 2370 return put_user(1, argp); 2371 #endif 2372 2373 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY 2374 /* Compatibility ioctl's for backlight */ 2375 case PMU_IOC_GET_BACKLIGHT: 2376 { 2377 int brightness; 2378 2379 brightness = pmac_backlight_get_legacy_brightness(); 2380 if (brightness < 0) 2381 return brightness; 2382 else 2383 return put_user(brightness, argp); 2384 2385 } 2386 case PMU_IOC_SET_BACKLIGHT: 2387 { 2388 int brightness; 2389 2390 error = get_user(brightness, argp); 2391 if (error) 2392 return error; 2393 2394 return pmac_backlight_set_legacy_brightness(brightness); 2395 } 2396 #ifdef CONFIG_INPUT_ADBHID 2397 case PMU_IOC_GRAB_BACKLIGHT: { 2398 struct pmu_private *pp = filp->private_data; 2399 2400 if (pp->backlight_locker) 2401 return 0; 2402 2403 pp->backlight_locker = 1; 2404 pmac_backlight_disable(); 2405 2406 return 0; 2407 } 2408 #endif /* CONFIG_INPUT_ADBHID */ 2409 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */ 2410 2411 case PMU_IOC_GET_MODEL: 2412 return put_user(pmu_kind, argp); 2413 case PMU_IOC_HAS_ADB: 2414 return put_user(pmu_has_adb, argp); 2415 } 2416 return error; 2417 } 2418 2419 static long pmu_unlocked_ioctl(struct file *filp, 2420 u_int cmd, u_long arg) 2421 { 2422 int ret; 2423 2424 mutex_lock(&pmu_info_proc_mutex); 2425 ret = pmu_ioctl(filp, cmd, arg); 2426 mutex_unlock(&pmu_info_proc_mutex); 2427 2428 return ret; 2429 } 2430 2431 #ifdef CONFIG_COMPAT 2432 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t) 2433 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t) 2434 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t) 2435 #define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t) 2436 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t) 2437 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t) 2438 2439 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg) 2440 { 2441 switch (cmd) { 2442 case PMU_IOC_SLEEP: 2443 break; 2444 case PMU_IOC_GET_BACKLIGHT32: 2445 cmd = PMU_IOC_GET_BACKLIGHT; 2446 break; 2447 case PMU_IOC_SET_BACKLIGHT32: 2448 cmd = PMU_IOC_SET_BACKLIGHT; 2449 break; 2450 case PMU_IOC_GET_MODEL32: 2451 cmd = PMU_IOC_GET_MODEL; 2452 break; 2453 case PMU_IOC_HAS_ADB32: 2454 cmd = PMU_IOC_HAS_ADB; 2455 break; 2456 case PMU_IOC_CAN_SLEEP32: 2457 cmd = PMU_IOC_CAN_SLEEP; 2458 break; 2459 case PMU_IOC_GRAB_BACKLIGHT32: 2460 cmd = PMU_IOC_GRAB_BACKLIGHT; 2461 break; 2462 default: 2463 return -ENOIOCTLCMD; 2464 } 2465 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); 2466 } 2467 #endif 2468 2469 static const struct file_operations pmu_device_fops = { 2470 .read = pmu_read, 2471 .write = pmu_write, 2472 .poll = pmu_fpoll, 2473 .unlocked_ioctl = pmu_unlocked_ioctl, 2474 #ifdef CONFIG_COMPAT 2475 .compat_ioctl = compat_pmu_ioctl, 2476 #endif 2477 .open = pmu_open, 2478 .release = pmu_release, 2479 .llseek = noop_llseek, 2480 }; 2481 2482 static struct miscdevice pmu_device = { 2483 PMU_MINOR, "pmu", &pmu_device_fops 2484 }; 2485 2486 static int pmu_device_init(void) 2487 { 2488 if (pmu_state == uninitialized) 2489 return 0; 2490 if (misc_register(&pmu_device) < 0) 2491 printk(KERN_ERR "via-pmu: cannot register misc device.\n"); 2492 return 0; 2493 } 2494 device_initcall(pmu_device_init); 2495 2496 2497 #ifdef DEBUG_SLEEP 2498 static inline void 2499 polled_handshake(void) 2500 { 2501 via2[B] &= ~TREQ; eieio(); 2502 while ((via2[B] & TACK) != 0) 2503 ; 2504 via2[B] |= TREQ; eieio(); 2505 while ((via2[B] & TACK) == 0) 2506 ; 2507 } 2508 2509 static inline void 2510 polled_send_byte(int x) 2511 { 2512 via1[ACR] |= SR_OUT | SR_EXT; eieio(); 2513 via1[SR] = x; eieio(); 2514 polled_handshake(); 2515 } 2516 2517 static inline int 2518 polled_recv_byte(void) 2519 { 2520 int x; 2521 2522 via1[ACR] = (via1[ACR] & ~SR_OUT) | SR_EXT; eieio(); 2523 x = via1[SR]; eieio(); 2524 polled_handshake(); 2525 x = via1[SR]; eieio(); 2526 return x; 2527 } 2528 2529 int 2530 pmu_polled_request(struct adb_request *req) 2531 { 2532 unsigned long flags; 2533 int i, l, c; 2534 2535 req->complete = 1; 2536 c = req->data[0]; 2537 l = pmu_data_len[c][0]; 2538 if (l >= 0 && req->nbytes != l + 1) 2539 return -EINVAL; 2540 2541 local_irq_save(flags); 2542 while (pmu_state != idle) 2543 pmu_poll(); 2544 2545 while ((via2[B] & TACK) == 0) 2546 ; 2547 polled_send_byte(c); 2548 if (l < 0) { 2549 l = req->nbytes - 1; 2550 polled_send_byte(l); 2551 } 2552 for (i = 1; i <= l; ++i) 2553 polled_send_byte(req->data[i]); 2554 2555 l = pmu_data_len[c][1]; 2556 if (l < 0) 2557 l = polled_recv_byte(); 2558 for (i = 0; i < l; ++i) 2559 req->reply[i + req->reply_len] = polled_recv_byte(); 2560 2561 if (req->done) 2562 (*req->done)(req); 2563 2564 local_irq_restore(flags); 2565 return 0; 2566 } 2567 2568 /* N.B. This doesn't work on the 3400 */ 2569 void pmu_blink(int n) 2570 { 2571 struct adb_request req; 2572 2573 memset(&req, 0, sizeof(req)); 2574 2575 for (; n > 0; --n) { 2576 req.nbytes = 4; 2577 req.done = NULL; 2578 req.data[0] = 0xee; 2579 req.data[1] = 4; 2580 req.data[2] = 0; 2581 req.data[3] = 1; 2582 req.reply[0] = ADB_RET_OK; 2583 req.reply_len = 1; 2584 req.reply_expected = 0; 2585 pmu_polled_request(&req); 2586 mdelay(50); 2587 req.nbytes = 4; 2588 req.done = NULL; 2589 req.data[0] = 0xee; 2590 req.data[1] = 4; 2591 req.data[2] = 0; 2592 req.data[3] = 0; 2593 req.reply[0] = ADB_RET_OK; 2594 req.reply_len = 1; 2595 req.reply_expected = 0; 2596 pmu_polled_request(&req); 2597 mdelay(50); 2598 } 2599 mdelay(50); 2600 } 2601 #endif /* DEBUG_SLEEP */ 2602 2603 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 2604 int pmu_sys_suspended; 2605 2606 static int pmu_syscore_suspend(void) 2607 { 2608 /* Suspend PMU event interrupts */ 2609 pmu_suspend(); 2610 pmu_sys_suspended = 1; 2611 2612 #ifdef CONFIG_PMAC_BACKLIGHT 2613 /* Tell backlight code not to muck around with the chip anymore */ 2614 pmu_backlight_set_sleep(1); 2615 #endif 2616 2617 return 0; 2618 } 2619 2620 static void pmu_syscore_resume(void) 2621 { 2622 struct adb_request req; 2623 2624 if (!pmu_sys_suspended) 2625 return; 2626 2627 /* Tell PMU we are ready */ 2628 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2629 pmu_wait_complete(&req); 2630 2631 #ifdef CONFIG_PMAC_BACKLIGHT 2632 /* Tell backlight code it can use the chip again */ 2633 pmu_backlight_set_sleep(0); 2634 #endif 2635 /* Resume PMU event interrupts */ 2636 pmu_resume(); 2637 pmu_sys_suspended = 0; 2638 } 2639 2640 static struct syscore_ops pmu_syscore_ops = { 2641 .suspend = pmu_syscore_suspend, 2642 .resume = pmu_syscore_resume, 2643 }; 2644 2645 static int pmu_syscore_register(void) 2646 { 2647 register_syscore_ops(&pmu_syscore_ops); 2648 2649 return 0; 2650 } 2651 subsys_initcall(pmu_syscore_register); 2652 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2653 2654 EXPORT_SYMBOL(pmu_request); 2655 EXPORT_SYMBOL(pmu_queue_request); 2656 EXPORT_SYMBOL(pmu_poll); 2657 EXPORT_SYMBOL(pmu_poll_adb); 2658 EXPORT_SYMBOL(pmu_wait_complete); 2659 EXPORT_SYMBOL(pmu_suspend); 2660 EXPORT_SYMBOL(pmu_resume); 2661 EXPORT_SYMBOL(pmu_unlock); 2662 #if defined(CONFIG_PPC32) 2663 EXPORT_SYMBOL(pmu_enable_irled); 2664 EXPORT_SYMBOL(pmu_battery_count); 2665 EXPORT_SYMBOL(pmu_batteries); 2666 EXPORT_SYMBOL(pmu_power_flags); 2667 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2668 2669