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kernel / drivers / macintosh / via-pmu.c
at 33bc227e4e48ddadcf2eacb381c19df338f0a6c8 3149 lines 76 kB view raw
1/* 2 * Device driver for the via-pmu on Apple Powermacs. 3 * 4 * The VIA (versatile interface adapter) interfaces to the PMU, 5 * a 6805 microprocessor core whose primary function is to control 6 * battery charging and system power on the PowerBook 3400 and 2400. 7 * The PMU also controls the ADB (Apple Desktop Bus) which connects 8 * to the keyboard and mouse, as well as the non-volatile RAM 9 * and the RTC (real time clock) chip. 10 * 11 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi. 12 * Copyright (C) 2001-2002 Benjamin Herrenschmidt 13 * 14 * THIS DRIVER IS BECOMING A TOTAL MESS ! 15 * - Cleanup atomically disabling reply to PMU events after 16 * a sleep or a freq. switch 17 * - Move sleep code out of here to pmac_pm, merge into new 18 * common PM infrastructure 19 * - Move backlight code out as well 20 * - Save/Restore PCI space properly 21 * 22 */ 23#include <stdarg.h> 24#include <linux/config.h> 25#include <linux/types.h> 26#include <linux/errno.h> 27#include <linux/kernel.h> 28#include <linux/delay.h> 29#include <linux/sched.h> 30#include <linux/miscdevice.h> 31#include <linux/blkdev.h> 32#include <linux/pci.h> 33#include <linux/slab.h> 34#include <linux/poll.h> 35#include <linux/adb.h> 36#include <linux/pmu.h> 37#include <linux/cuda.h> 38#include <linux/smp_lock.h> 39#include <linux/module.h> 40#include <linux/spinlock.h> 41#include <linux/pm.h> 42#include <linux/proc_fs.h> 43#include <linux/init.h> 44#include <linux/interrupt.h> 45#include <linux/device.h> 46#include <linux/sysdev.h> 47#include <linux/suspend.h> 48#include <linux/syscalls.h> 49#include <linux/cpu.h> 50#include <asm/prom.h> 51#include <asm/machdep.h> 52#include <asm/io.h> 53#include <asm/pgtable.h> 54#include <asm/system.h> 55#include <asm/sections.h> 56#include <asm/irq.h> 57#include <asm/pmac_feature.h> 58#include <asm/uaccess.h> 59#include <asm/mmu_context.h> 60#include <asm/cputable.h> 61#include <asm/time.h> 62#ifdef CONFIG_PMAC_BACKLIGHT 63#include <asm/backlight.h> 64#endif 65 66#ifdef CONFIG_PPC32 67#include <asm/open_pic.h> 68#endif 69 70/* Some compile options */ 71#undef SUSPEND_USES_PMU 72#define DEBUG_SLEEP 73#undef HACKED_PCI_SAVE 74 75/* Misc minor number allocated for /dev/pmu */ 76#define PMU_MINOR 154 77 78/* How many iterations between battery polls */ 79#define BATTERY_POLLING_COUNT 2 80 81static volatile unsigned char __iomem *via; 82 83/* VIA registers - spaced 0x200 bytes apart */ 84#define RS 0x200 /* skip between registers */ 85#define B 0 /* B-side data */ 86#define A RS /* A-side data */ 87#define DIRB (2*RS) /* B-side direction (1=output) */ 88#define DIRA (3*RS) /* A-side direction (1=output) */ 89#define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */ 90#define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */ 91#define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */ 92#define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */ 93#define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */ 94#define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */ 95#define SR (10*RS) /* Shift register */ 96#define ACR (11*RS) /* Auxiliary control register */ 97#define PCR (12*RS) /* Peripheral control register */ 98#define IFR (13*RS) /* Interrupt flag register */ 99#define IER (14*RS) /* Interrupt enable register */ 100#define ANH (15*RS) /* A-side data, no handshake */ 101 102/* Bits in B data register: both active low */ 103#define TACK 0x08 /* Transfer acknowledge (input) */ 104#define TREQ 0x10 /* Transfer request (output) */ 105 106/* Bits in ACR */ 107#define SR_CTRL 0x1c /* Shift register control bits */ 108#define SR_EXT 0x0c /* Shift on external clock */ 109#define SR_OUT 0x10 /* Shift out if 1 */ 110 111/* Bits in IFR and IER */ 112#define IER_SET 0x80 /* set bits in IER */ 113#define IER_CLR 0 /* clear bits in IER */ 114#define SR_INT 0x04 /* Shift register full/empty */ 115#define CB2_INT 0x08 116#define CB1_INT 0x10 /* transition on CB1 input */ 117 118static volatile enum pmu_state { 119 idle, 120 sending, 121 intack, 122 reading, 123 reading_intr, 124 locked, 125} pmu_state; 126 127static volatile enum int_data_state { 128 int_data_empty, 129 int_data_fill, 130 int_data_ready, 131 int_data_flush 132} int_data_state[2] = { int_data_empty, int_data_empty }; 133 134static struct adb_request *current_req; 135static struct adb_request *last_req; 136static struct adb_request *req_awaiting_reply; 137static unsigned char interrupt_data[2][32]; 138static int interrupt_data_len[2]; 139static int int_data_last; 140static unsigned char *reply_ptr; 141static int data_index; 142static int data_len; 143static volatile int adb_int_pending; 144static volatile int disable_poll; 145static struct adb_request bright_req_1, bright_req_2; 146static struct device_node *vias; 147static int pmu_kind = PMU_UNKNOWN; 148static int pmu_fully_inited = 0; 149static int pmu_has_adb; 150static unsigned char __iomem *gpio_reg = NULL; 151static int gpio_irq = -1; 152static int gpio_irq_enabled = -1; 153static volatile int pmu_suspended = 0; 154static spinlock_t pmu_lock; 155static u8 pmu_intr_mask; 156static int pmu_version; 157static int drop_interrupts; 158#if defined(CONFIG_PM) && defined(CONFIG_PPC32) 159static int option_lid_wakeup = 1; 160static int sleep_in_progress; 161#endif /* CONFIG_PM && CONFIG_PPC32 */ 162static unsigned long async_req_locks; 163static unsigned int pmu_irq_stats[11]; 164 165static struct proc_dir_entry *proc_pmu_root; 166static struct proc_dir_entry *proc_pmu_info; 167static struct proc_dir_entry *proc_pmu_irqstats; 168static struct proc_dir_entry *proc_pmu_options; 169static int option_server_mode; 170 171int pmu_battery_count; 172int pmu_cur_battery; 173unsigned int pmu_power_flags; 174struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES]; 175static int query_batt_timer = BATTERY_POLLING_COUNT; 176static struct adb_request batt_req; 177static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES]; 178 179#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 180extern int disable_kernel_backlight; 181#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 182 183int __fake_sleep; 184int asleep; 185struct notifier_block *sleep_notifier_list; 186 187#ifdef CONFIG_ADB 188static int adb_dev_map = 0; 189static int pmu_adb_flags; 190 191static int pmu_probe(void); 192static int pmu_init(void); 193static int pmu_send_request(struct adb_request *req, int sync); 194static int pmu_adb_autopoll(int devs); 195static int pmu_adb_reset_bus(void); 196#endif /* CONFIG_ADB */ 197 198static int init_pmu(void); 199static int pmu_queue_request(struct adb_request *req); 200static void pmu_start(void); 201static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs); 202static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs); 203static int proc_get_info(char *page, char **start, off_t off, 204 int count, int *eof, void *data); 205static int proc_get_irqstats(char *page, char **start, off_t off, 206 int count, int *eof, void *data); 207#ifdef CONFIG_PMAC_BACKLIGHT 208static int pmu_set_backlight_level(int level, void* data); 209static int pmu_set_backlight_enable(int on, int level, void* data); 210#endif /* CONFIG_PMAC_BACKLIGHT */ 211static void pmu_pass_intr(unsigned char *data, int len); 212static int proc_get_batt(char *page, char **start, off_t off, 213 int count, int *eof, void *data); 214static int proc_read_options(char *page, char **start, off_t off, 215 int count, int *eof, void *data); 216static int proc_write_options(struct file *file, const char __user *buffer, 217 unsigned long count, void *data); 218 219#ifdef CONFIG_ADB 220struct adb_driver via_pmu_driver = { 221 "PMU", 222 pmu_probe, 223 pmu_init, 224 pmu_send_request, 225 pmu_adb_autopoll, 226 pmu_poll_adb, 227 pmu_adb_reset_bus 228}; 229#endif /* CONFIG_ADB */ 230 231extern void low_sleep_handler(void); 232extern void enable_kernel_altivec(void); 233extern void enable_kernel_fp(void); 234 235#ifdef DEBUG_SLEEP 236int pmu_polled_request(struct adb_request *req); 237int pmu_wink(struct adb_request *req); 238#endif 239 240/* 241 * This table indicates for each PMU opcode: 242 * - the number of data bytes to be sent with the command, or -1 243 * if a length byte should be sent, 244 * - the number of response bytes which the PMU will return, or 245 * -1 if it will send a length byte. 246 */ 247static const s8 pmu_data_len[256][2] = { 248/* 0 1 2 3 4 5 6 7 */ 249/*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 250/*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 251/*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 252/*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0}, 253/*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0}, 254/*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1}, 255/*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 256/*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0}, 257/*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 258/*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1}, 259/*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0}, 260/*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1}, 261/*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 262/*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1}, 263/*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 264/*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1}, 265/*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 266/*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 267/*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 268/*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 269/*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0}, 270/*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 271/*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 272/*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 273/*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 274/*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 275/*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 276/*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1}, 277/*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0}, 278/*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0}, 279/*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 280/*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 281}; 282 283static char *pbook_type[] = { 284 "Unknown PowerBook", 285 "PowerBook 2400/3400/3500(G3)", 286 "PowerBook G3 Series", 287 "1999 PowerBook G3", 288 "Core99" 289}; 290 291#ifdef CONFIG_PMAC_BACKLIGHT 292static struct backlight_controller pmu_backlight_controller = { 293 pmu_set_backlight_enable, 294 pmu_set_backlight_level 295}; 296#endif /* CONFIG_PMAC_BACKLIGHT */ 297 298int 299find_via_pmu(void) 300{ 301 if (via != 0) 302 return 1; 303 vias = find_devices("via-pmu"); 304 if (vias == 0) 305 return 0; 306 if (vias->next != 0) 307 printk(KERN_WARNING "Warning: only using 1st via-pmu\n"); 308 309 if (vias->n_addrs < 1 || vias->n_intrs < 1) { 310 printk(KERN_ERR "via-pmu: %d addresses, %d interrupts!\n", 311 vias->n_addrs, vias->n_intrs); 312 if (vias->n_addrs < 1 || vias->n_intrs < 1) 313 return 0; 314 } 315 316 spin_lock_init(&pmu_lock); 317 318 pmu_has_adb = 1; 319 320 pmu_intr_mask = PMU_INT_PCEJECT | 321 PMU_INT_SNDBRT | 322 PMU_INT_ADB | 323 PMU_INT_TICK; 324 325 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0) 326 || device_is_compatible(vias->parent, "ohare"))) 327 pmu_kind = PMU_OHARE_BASED; 328 else if (device_is_compatible(vias->parent, "paddington")) 329 pmu_kind = PMU_PADDINGTON_BASED; 330 else if (device_is_compatible(vias->parent, "heathrow")) 331 pmu_kind = PMU_HEATHROW_BASED; 332 else if (device_is_compatible(vias->parent, "Keylargo") 333 || device_is_compatible(vias->parent, "K2-Keylargo")) { 334 struct device_node *gpio, *gpiop; 335 336 pmu_kind = PMU_KEYLARGO_BASED; 337 pmu_has_adb = (find_type_devices("adb") != NULL); 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 = find_devices("gpio"); 345 if (gpiop && gpiop->n_addrs) { 346 gpio_reg = ioremap(gpiop->addrs->address, 0x10); 347 gpio = find_devices("extint-gpio1"); 348 if (gpio == NULL) 349 gpio = find_devices("pmu-interrupt"); 350 if (gpio && gpio->parent == gpiop && gpio->n_intrs) 351 gpio_irq = gpio->intrs[0].line; 352 } 353 } else 354 pmu_kind = PMU_UNKNOWN; 355 356 via = ioremap(vias->addrs->address, 0x2000); 357 358 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 359 out_8(&via[IFR], 0x7f); /* clear IFR */ 360 361 pmu_state = idle; 362 363 if (!init_pmu()) { 364 via = NULL; 365 return 0; 366 } 367 368 printk(KERN_INFO "PMU driver %d initialized for %s, firmware: %02x\n", 369 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version); 370 371 sys_ctrler = SYS_CTRLER_PMU; 372 373 return 1; 374} 375 376#ifdef CONFIG_ADB 377static int 378pmu_probe(void) 379{ 380 return vias == NULL? -ENODEV: 0; 381} 382 383static int __init 384pmu_init(void) 385{ 386 if (vias == NULL) 387 return -ENODEV; 388 return 0; 389} 390#endif /* CONFIG_ADB */ 391 392/* 393 * We can't wait until pmu_init gets called, that happens too late. 394 * It happens after IDE and SCSI initialization, which can take a few 395 * seconds, and by that time the PMU could have given up on us and 396 * turned us off. 397 * Thus this is called with arch_initcall rather than device_initcall. 398 */ 399static int __init via_pmu_start(void) 400{ 401 if (vias == NULL) 402 return -ENODEV; 403 404 bright_req_1.complete = 1; 405 bright_req_2.complete = 1; 406 batt_req.complete = 1; 407 408#if defined(CONFIG_PPC32) && !defined(CONFIG_PPC_MERGE) 409 if (pmu_kind == PMU_KEYLARGO_BASED) 410 openpic_set_irq_priority(vias->intrs[0].line, 411 OPENPIC_PRIORITY_DEFAULT + 1); 412#endif 413 414 if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU", 415 (void *)0)) { 416 printk(KERN_ERR "VIA-PMU: can't get irq %d\n", 417 vias->intrs[0].line); 418 return -EAGAIN; 419 } 420 421 if (pmu_kind == PMU_KEYLARGO_BASED && gpio_irq != -1) { 422 if (request_irq(gpio_irq, gpio1_interrupt, 0, "GPIO1 ADB", (void *)0)) 423 printk(KERN_ERR "pmu: can't get irq %d (GPIO1)\n", gpio_irq); 424 gpio_irq_enabled = 1; 425 } 426 427 /* Enable interrupts */ 428 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 429 430 pmu_fully_inited = 1; 431 432 /* Make sure PMU settle down before continuing. This is _very_ important 433 * since the IDE probe may shut interrupts down for quite a bit of time. If 434 * a PMU communication is pending while this happens, the PMU may timeout 435 * Not that on Core99 machines, the PMU keeps sending us environement 436 * messages, we should find a way to either fix IDE or make it call 437 * pmu_suspend() before masking interrupts. This can also happens while 438 * scolling with some fbdevs. 439 */ 440 do { 441 pmu_poll(); 442 } while (pmu_state != idle); 443 444 return 0; 445} 446 447arch_initcall(via_pmu_start); 448 449/* 450 * This has to be done after pci_init, which is a subsys_initcall. 451 */ 452static int __init via_pmu_dev_init(void) 453{ 454 if (vias == NULL) 455 return -ENODEV; 456 457#ifndef CONFIG_PPC64 458 request_OF_resource(vias, 0, NULL); 459#endif 460#ifdef CONFIG_PMAC_BACKLIGHT 461 /* Enable backlight */ 462 register_backlight_controller(&pmu_backlight_controller, NULL, "pmu"); 463#endif /* CONFIG_PMAC_BACKLIGHT */ 464 465#ifdef CONFIG_PPC32 466 if (machine_is_compatible("AAPL,3400/2400") || 467 machine_is_compatible("AAPL,3500")) { 468 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 469 NULL, PMAC_MB_INFO_MODEL, 0); 470 pmu_battery_count = 1; 471 if (mb == PMAC_TYPE_COMET) 472 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET; 473 else 474 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER; 475 } else if (machine_is_compatible("AAPL,PowerBook1998") || 476 machine_is_compatible("PowerBook1,1")) { 477 pmu_battery_count = 2; 478 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 479 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 480 } else { 481 struct device_node* prim = find_devices("power-mgt"); 482 u32 *prim_info = NULL; 483 if (prim) 484 prim_info = (u32 *)get_property(prim, "prim-info", NULL); 485 if (prim_info) { 486 /* Other stuffs here yet unknown */ 487 pmu_battery_count = (prim_info[6] >> 16) & 0xff; 488 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 489 if (pmu_battery_count > 1) 490 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 491 } 492 } 493#endif /* CONFIG_PPC32 */ 494 495 /* Create /proc/pmu */ 496 proc_pmu_root = proc_mkdir("pmu", NULL); 497 if (proc_pmu_root) { 498 long i; 499 500 for (i=0; i<pmu_battery_count; i++) { 501 char title[16]; 502 sprintf(title, "battery_%ld", i); 503 proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root, 504 proc_get_batt, (void *)i); 505 } 506 507 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root, 508 proc_get_info, NULL); 509 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root, 510 proc_get_irqstats, NULL); 511 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root); 512 if (proc_pmu_options) { 513 proc_pmu_options->nlink = 1; 514 proc_pmu_options->read_proc = proc_read_options; 515 proc_pmu_options->write_proc = proc_write_options; 516 } 517 } 518 return 0; 519} 520 521device_initcall(via_pmu_dev_init); 522 523static int 524init_pmu(void) 525{ 526 int timeout; 527 struct adb_request req; 528 529 out_8(&via[B], via[B] | TREQ); /* negate TREQ */ 530 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */ 531 532 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 533 timeout = 100000; 534 while (!req.complete) { 535 if (--timeout < 0) { 536 printk(KERN_ERR "init_pmu: no response from PMU\n"); 537 return 0; 538 } 539 udelay(10); 540 pmu_poll(); 541 } 542 543 /* ack all pending interrupts */ 544 timeout = 100000; 545 interrupt_data[0][0] = 1; 546 while (interrupt_data[0][0] || pmu_state != idle) { 547 if (--timeout < 0) { 548 printk(KERN_ERR "init_pmu: timed out acking intrs\n"); 549 return 0; 550 } 551 if (pmu_state == idle) 552 adb_int_pending = 1; 553 via_pmu_interrupt(0, NULL, NULL); 554 udelay(10); 555 } 556 557 /* Tell PMU we are ready. */ 558 if (pmu_kind == PMU_KEYLARGO_BASED) { 559 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 560 while (!req.complete) 561 pmu_poll(); 562 } 563 564 /* Read PMU version */ 565 pmu_request(&req, NULL, 1, PMU_GET_VERSION); 566 pmu_wait_complete(&req); 567 if (req.reply_len > 0) 568 pmu_version = req.reply[0]; 569 570 /* Read server mode setting */ 571 if (pmu_kind == PMU_KEYLARGO_BASED) { 572 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, 573 PMU_PWR_GET_POWERUP_EVENTS); 574 pmu_wait_complete(&req); 575 if (req.reply_len == 2) { 576 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT) 577 option_server_mode = 1; 578 printk(KERN_INFO "via-pmu: Server Mode is %s\n", 579 option_server_mode ? "enabled" : "disabled"); 580 } 581 } 582 return 1; 583} 584 585int 586pmu_get_model(void) 587{ 588 return pmu_kind; 589} 590 591static void pmu_set_server_mode(int server_mode) 592{ 593 struct adb_request req; 594 595 if (pmu_kind != PMU_KEYLARGO_BASED) 596 return; 597 598 option_server_mode = server_mode; 599 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS); 600 pmu_wait_complete(&req); 601 if (req.reply_len < 2) 602 return; 603 if (server_mode) 604 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 605 PMU_PWR_SET_POWERUP_EVENTS, 606 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 607 else 608 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 609 PMU_PWR_CLR_POWERUP_EVENTS, 610 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 611 pmu_wait_complete(&req); 612} 613 614/* This new version of the code for 2400/3400/3500 powerbooks 615 * is inspired from the implementation in gkrellm-pmu 616 */ 617static void 618done_battery_state_ohare(struct adb_request* req) 619{ 620 /* format: 621 * [0] : flags 622 * 0x01 : AC indicator 623 * 0x02 : charging 624 * 0x04 : battery exist 625 * 0x08 : 626 * 0x10 : 627 * 0x20 : full charged 628 * 0x40 : pcharge reset 629 * 0x80 : battery exist 630 * 631 * [1][2] : battery voltage 632 * [3] : CPU temperature 633 * [4] : battery temperature 634 * [5] : current 635 * [6][7] : pcharge 636 * --tkoba 637 */ 638 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER; 639 long pcharge, charge, vb, vmax, lmax; 640 long vmax_charging, vmax_charged; 641 long amperage, voltage, time, max; 642 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 643 NULL, PMAC_MB_INFO_MODEL, 0); 644 645 if (req->reply[0] & 0x01) 646 pmu_power_flags |= PMU_PWR_AC_PRESENT; 647 else 648 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 649 650 if (mb == PMAC_TYPE_COMET) { 651 vmax_charged = 189; 652 vmax_charging = 213; 653 lmax = 6500; 654 } else { 655 vmax_charged = 330; 656 vmax_charging = 330; 657 lmax = 6500; 658 } 659 vmax = vmax_charged; 660 661 /* If battery installed */ 662 if (req->reply[0] & 0x04) { 663 bat_flags |= PMU_BATT_PRESENT; 664 if (req->reply[0] & 0x02) 665 bat_flags |= PMU_BATT_CHARGING; 666 vb = (req->reply[1] << 8) | req->reply[2]; 667 voltage = (vb * 265 + 72665) / 10; 668 amperage = req->reply[5]; 669 if ((req->reply[0] & 0x01) == 0) { 670 if (amperage > 200) 671 vb += ((amperage - 200) * 15)/100; 672 } else if (req->reply[0] & 0x02) { 673 vb = (vb * 97) / 100; 674 vmax = vmax_charging; 675 } 676 charge = (100 * vb) / vmax; 677 if (req->reply[0] & 0x40) { 678 pcharge = (req->reply[6] << 8) + req->reply[7]; 679 if (pcharge > lmax) 680 pcharge = lmax; 681 pcharge *= 100; 682 pcharge = 100 - pcharge / lmax; 683 if (pcharge < charge) 684 charge = pcharge; 685 } 686 if (amperage > 0) 687 time = (charge * 16440) / amperage; 688 else 689 time = 0; 690 max = 100; 691 amperage = -amperage; 692 } else 693 charge = max = amperage = voltage = time = 0; 694 695 pmu_batteries[pmu_cur_battery].flags = bat_flags; 696 pmu_batteries[pmu_cur_battery].charge = charge; 697 pmu_batteries[pmu_cur_battery].max_charge = max; 698 pmu_batteries[pmu_cur_battery].amperage = amperage; 699 pmu_batteries[pmu_cur_battery].voltage = voltage; 700 pmu_batteries[pmu_cur_battery].time_remaining = time; 701 702 clear_bit(0, &async_req_locks); 703} 704 705static void 706done_battery_state_smart(struct adb_request* req) 707{ 708 /* format: 709 * [0] : format of this structure (known: 3,4,5) 710 * [1] : flags 711 * 712 * format 3 & 4: 713 * 714 * [2] : charge 715 * [3] : max charge 716 * [4] : current 717 * [5] : voltage 718 * 719 * format 5: 720 * 721 * [2][3] : charge 722 * [4][5] : max charge 723 * [6][7] : current 724 * [8][9] : voltage 725 */ 726 727 unsigned int bat_flags = PMU_BATT_TYPE_SMART; 728 int amperage; 729 unsigned int capa, max, voltage; 730 731 if (req->reply[1] & 0x01) 732 pmu_power_flags |= PMU_PWR_AC_PRESENT; 733 else 734 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 735 736 737 capa = max = amperage = voltage = 0; 738 739 if (req->reply[1] & 0x04) { 740 bat_flags |= PMU_BATT_PRESENT; 741 switch(req->reply[0]) { 742 case 3: 743 case 4: capa = req->reply[2]; 744 max = req->reply[3]; 745 amperage = *((signed char *)&req->reply[4]); 746 voltage = req->reply[5]; 747 break; 748 case 5: capa = (req->reply[2] << 8) | req->reply[3]; 749 max = (req->reply[4] << 8) | req->reply[5]; 750 amperage = *((signed short *)&req->reply[6]); 751 voltage = (req->reply[8] << 8) | req->reply[9]; 752 break; 753 default: 754 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n", 755 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]); 756 break; 757 } 758 } 759 760 if ((req->reply[1] & 0x01) && (amperage > 0)) 761 bat_flags |= PMU_BATT_CHARGING; 762 763 pmu_batteries[pmu_cur_battery].flags = bat_flags; 764 pmu_batteries[pmu_cur_battery].charge = capa; 765 pmu_batteries[pmu_cur_battery].max_charge = max; 766 pmu_batteries[pmu_cur_battery].amperage = amperage; 767 pmu_batteries[pmu_cur_battery].voltage = voltage; 768 if (amperage) { 769 if ((req->reply[1] & 0x01) && (amperage > 0)) 770 pmu_batteries[pmu_cur_battery].time_remaining 771 = ((max-capa) * 3600) / amperage; 772 else 773 pmu_batteries[pmu_cur_battery].time_remaining 774 = (capa * 3600) / (-amperage); 775 } else 776 pmu_batteries[pmu_cur_battery].time_remaining = 0; 777 778 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count; 779 780 clear_bit(0, &async_req_locks); 781} 782 783static void 784query_battery_state(void) 785{ 786 if (test_and_set_bit(0, &async_req_locks)) 787 return; 788 if (pmu_kind == PMU_OHARE_BASED) 789 pmu_request(&batt_req, done_battery_state_ohare, 790 1, PMU_BATTERY_STATE); 791 else 792 pmu_request(&batt_req, done_battery_state_smart, 793 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1); 794} 795 796static int 797proc_get_info(char *page, char **start, off_t off, 798 int count, int *eof, void *data) 799{ 800 char* p = page; 801 802 p += sprintf(p, "PMU driver version : %d\n", PMU_DRIVER_VERSION); 803 p += sprintf(p, "PMU firmware version : %02x\n", pmu_version); 804 p += sprintf(p, "AC Power : %d\n", 805 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0)); 806 p += sprintf(p, "Battery count : %d\n", pmu_battery_count); 807 808 return p - page; 809} 810 811static int 812proc_get_irqstats(char *page, char **start, off_t off, 813 int count, int *eof, void *data) 814{ 815 int i; 816 char* p = page; 817 static const char *irq_names[] = { 818 "Total CB1 triggered events", 819 "Total GPIO1 triggered events", 820 "PC-Card eject button", 821 "Sound/Brightness button", 822 "ADB message", 823 "Battery state change", 824 "Environment interrupt", 825 "Tick timer", 826 "Ghost interrupt (zero len)", 827 "Empty interrupt (empty mask)", 828 "Max irqs in a row" 829 }; 830 831 for (i=0; i<11; i++) { 832 p += sprintf(p, " %2u: %10u (%s)\n", 833 i, pmu_irq_stats[i], irq_names[i]); 834 } 835 return p - page; 836} 837 838static int 839proc_get_batt(char *page, char **start, off_t off, 840 int count, int *eof, void *data) 841{ 842 long batnum = (long)data; 843 char *p = page; 844 845 p += sprintf(p, "\n"); 846 p += sprintf(p, "flags : %08x\n", 847 pmu_batteries[batnum].flags); 848 p += sprintf(p, "charge : %d\n", 849 pmu_batteries[batnum].charge); 850 p += sprintf(p, "max_charge : %d\n", 851 pmu_batteries[batnum].max_charge); 852 p += sprintf(p, "current : %d\n", 853 pmu_batteries[batnum].amperage); 854 p += sprintf(p, "voltage : %d\n", 855 pmu_batteries[batnum].voltage); 856 p += sprintf(p, "time rem. : %d\n", 857 pmu_batteries[batnum].time_remaining); 858 859 return p - page; 860} 861 862static int 863proc_read_options(char *page, char **start, off_t off, 864 int count, int *eof, void *data) 865{ 866 char *p = page; 867 868#if defined(CONFIG_PM) && defined(CONFIG_PPC32) 869 if (pmu_kind == PMU_KEYLARGO_BASED && 870 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 871 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup); 872#endif 873 if (pmu_kind == PMU_KEYLARGO_BASED) 874 p += sprintf(p, "server_mode=%d\n", option_server_mode); 875 876 return p - page; 877} 878 879static int 880proc_write_options(struct file *file, const char __user *buffer, 881 unsigned long count, void *data) 882{ 883 char tmp[33]; 884 char *label, *val; 885 unsigned long fcount = count; 886 887 if (!count) 888 return -EINVAL; 889 if (count > 32) 890 count = 32; 891 if (copy_from_user(tmp, buffer, count)) 892 return -EFAULT; 893 tmp[count] = 0; 894 895 label = tmp; 896 while(*label == ' ') 897 label++; 898 val = label; 899 while(*val && (*val != '=')) { 900 if (*val == ' ') 901 *val = 0; 902 val++; 903 } 904 if ((*val) == 0) 905 return -EINVAL; 906 *(val++) = 0; 907 while(*val == ' ') 908 val++; 909#if defined(CONFIG_PM) && defined(CONFIG_PPC32) 910 if (pmu_kind == PMU_KEYLARGO_BASED && 911 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 912 if (!strcmp(label, "lid_wakeup")) 913 option_lid_wakeup = ((*val) == '1'); 914#endif 915 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) { 916 int new_value; 917 new_value = ((*val) == '1'); 918 if (new_value != option_server_mode) 919 pmu_set_server_mode(new_value); 920 } 921 return fcount; 922} 923 924#ifdef CONFIG_ADB 925/* Send an ADB command */ 926static int 927pmu_send_request(struct adb_request *req, int sync) 928{ 929 int i, ret; 930 931 if ((vias == NULL) || (!pmu_fully_inited)) { 932 req->complete = 1; 933 return -ENXIO; 934 } 935 936 ret = -EINVAL; 937 938 switch (req->data[0]) { 939 case PMU_PACKET: 940 for (i = 0; i < req->nbytes - 1; ++i) 941 req->data[i] = req->data[i+1]; 942 --req->nbytes; 943 if (pmu_data_len[req->data[0]][1] != 0) { 944 req->reply[0] = ADB_RET_OK; 945 req->reply_len = 1; 946 } else 947 req->reply_len = 0; 948 ret = pmu_queue_request(req); 949 break; 950 case CUDA_PACKET: 951 switch (req->data[1]) { 952 case CUDA_GET_TIME: 953 if (req->nbytes != 2) 954 break; 955 req->data[0] = PMU_READ_RTC; 956 req->nbytes = 1; 957 req->reply_len = 3; 958 req->reply[0] = CUDA_PACKET; 959 req->reply[1] = 0; 960 req->reply[2] = CUDA_GET_TIME; 961 ret = pmu_queue_request(req); 962 break; 963 case CUDA_SET_TIME: 964 if (req->nbytes != 6) 965 break; 966 req->data[0] = PMU_SET_RTC; 967 req->nbytes = 5; 968 for (i = 1; i <= 4; ++i) 969 req->data[i] = req->data[i+1]; 970 req->reply_len = 3; 971 req->reply[0] = CUDA_PACKET; 972 req->reply[1] = 0; 973 req->reply[2] = CUDA_SET_TIME; 974 ret = pmu_queue_request(req); 975 break; 976 } 977 break; 978 case ADB_PACKET: 979 if (!pmu_has_adb) 980 return -ENXIO; 981 for (i = req->nbytes - 1; i > 1; --i) 982 req->data[i+2] = req->data[i]; 983 req->data[3] = req->nbytes - 2; 984 req->data[2] = pmu_adb_flags; 985 /*req->data[1] = req->data[1];*/ 986 req->data[0] = PMU_ADB_CMD; 987 req->nbytes += 2; 988 req->reply_expected = 1; 989 req->reply_len = 0; 990 ret = pmu_queue_request(req); 991 break; 992 } 993 if (ret) { 994 req->complete = 1; 995 return ret; 996 } 997 998 if (sync) 999 while (!req->complete) 1000 pmu_poll(); 1001 1002 return 0; 1003} 1004 1005/* Enable/disable autopolling */ 1006static int 1007pmu_adb_autopoll(int devs) 1008{ 1009 struct adb_request req; 1010 1011 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1012 return -ENXIO; 1013 1014 if (devs) { 1015 adb_dev_map = devs; 1016 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86, 1017 adb_dev_map >> 8, adb_dev_map); 1018 pmu_adb_flags = 2; 1019 } else { 1020 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF); 1021 pmu_adb_flags = 0; 1022 } 1023 while (!req.complete) 1024 pmu_poll(); 1025 return 0; 1026} 1027 1028/* Reset the ADB bus */ 1029static int 1030pmu_adb_reset_bus(void) 1031{ 1032 struct adb_request req; 1033 int save_autopoll = adb_dev_map; 1034 1035 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1036 return -ENXIO; 1037 1038 /* anyone got a better idea?? */ 1039 pmu_adb_autopoll(0); 1040 1041 req.nbytes = 5; 1042 req.done = NULL; 1043 req.data[0] = PMU_ADB_CMD; 1044 req.data[1] = 0; 1045 req.data[2] = ADB_BUSRESET; 1046 req.data[3] = 0; 1047 req.data[4] = 0; 1048 req.reply_len = 0; 1049 req.reply_expected = 1; 1050 if (pmu_queue_request(&req) != 0) { 1051 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n"); 1052 return -EIO; 1053 } 1054 pmu_wait_complete(&req); 1055 1056 if (save_autopoll != 0) 1057 pmu_adb_autopoll(save_autopoll); 1058 1059 return 0; 1060} 1061#endif /* CONFIG_ADB */ 1062 1063/* Construct and send a pmu request */ 1064int 1065pmu_request(struct adb_request *req, void (*done)(struct adb_request *), 1066 int nbytes, ...) 1067{ 1068 va_list list; 1069 int i; 1070 1071 if (vias == NULL) 1072 return -ENXIO; 1073 1074 if (nbytes < 0 || nbytes > 32) { 1075 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes); 1076 req->complete = 1; 1077 return -EINVAL; 1078 } 1079 req->nbytes = nbytes; 1080 req->done = done; 1081 va_start(list, nbytes); 1082 for (i = 0; i < nbytes; ++i) 1083 req->data[i] = va_arg(list, int); 1084 va_end(list); 1085 req->reply_len = 0; 1086 req->reply_expected = 0; 1087 return pmu_queue_request(req); 1088} 1089 1090int 1091pmu_queue_request(struct adb_request *req) 1092{ 1093 unsigned long flags; 1094 int nsend; 1095 1096 if (via == NULL) { 1097 req->complete = 1; 1098 return -ENXIO; 1099 } 1100 if (req->nbytes <= 0) { 1101 req->complete = 1; 1102 return 0; 1103 } 1104 nsend = pmu_data_len[req->data[0]][0]; 1105 if (nsend >= 0 && req->nbytes != nsend + 1) { 1106 req->complete = 1; 1107 return -EINVAL; 1108 } 1109 1110 req->next = NULL; 1111 req->sent = 0; 1112 req->complete = 0; 1113 1114 spin_lock_irqsave(&pmu_lock, flags); 1115 if (current_req != 0) { 1116 last_req->next = req; 1117 last_req = req; 1118 } else { 1119 current_req = req; 1120 last_req = req; 1121 if (pmu_state == idle) 1122 pmu_start(); 1123 } 1124 spin_unlock_irqrestore(&pmu_lock, flags); 1125 1126 return 0; 1127} 1128 1129static inline void 1130wait_for_ack(void) 1131{ 1132 /* Sightly increased the delay, I had one occurrence of the message 1133 * reported 1134 */ 1135 int timeout = 4000; 1136 while ((in_8(&via[B]) & TACK) == 0) { 1137 if (--timeout < 0) { 1138 printk(KERN_ERR "PMU not responding (!ack)\n"); 1139 return; 1140 } 1141 udelay(10); 1142 } 1143} 1144 1145/* New PMU seems to be very sensitive to those timings, so we make sure 1146 * PCI is flushed immediately */ 1147static inline void 1148send_byte(int x) 1149{ 1150 volatile unsigned char __iomem *v = via; 1151 1152 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT); 1153 out_8(&v[SR], x); 1154 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */ 1155 (void)in_8(&v[B]); 1156} 1157 1158static inline void 1159recv_byte(void) 1160{ 1161 volatile unsigned char __iomem *v = via; 1162 1163 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT); 1164 in_8(&v[SR]); /* resets SR */ 1165 out_8(&v[B], in_8(&v[B]) & ~TREQ); 1166 (void)in_8(&v[B]); 1167} 1168 1169static inline void 1170pmu_done(struct adb_request *req) 1171{ 1172 void (*done)(struct adb_request *) = req->done; 1173 mb(); 1174 req->complete = 1; 1175 /* Here, we assume that if the request has a done member, the 1176 * struct request will survive to setting req->complete to 1 1177 */ 1178 if (done) 1179 (*done)(req); 1180} 1181 1182static void 1183pmu_start(void) 1184{ 1185 struct adb_request *req; 1186 1187 /* assert pmu_state == idle */ 1188 /* get the packet to send */ 1189 req = current_req; 1190 if (req == 0 || pmu_state != idle 1191 || (/*req->reply_expected && */req_awaiting_reply)) 1192 return; 1193 1194 pmu_state = sending; 1195 data_index = 1; 1196 data_len = pmu_data_len[req->data[0]][0]; 1197 1198 /* Sounds safer to make sure ACK is high before writing. This helped 1199 * kill a problem with ADB and some iBooks 1200 */ 1201 wait_for_ack(); 1202 /* set the shift register to shift out and send a byte */ 1203 send_byte(req->data[0]); 1204} 1205 1206void 1207pmu_poll(void) 1208{ 1209 if (!via) 1210 return; 1211 if (disable_poll) 1212 return; 1213 via_pmu_interrupt(0, NULL, NULL); 1214} 1215 1216void 1217pmu_poll_adb(void) 1218{ 1219 if (!via) 1220 return; 1221 if (disable_poll) 1222 return; 1223 /* Kicks ADB read when PMU is suspended */ 1224 adb_int_pending = 1; 1225 do { 1226 via_pmu_interrupt(0, NULL, NULL); 1227 } while (pmu_suspended && (adb_int_pending || pmu_state != idle 1228 || req_awaiting_reply)); 1229} 1230 1231void 1232pmu_wait_complete(struct adb_request *req) 1233{ 1234 if (!via) 1235 return; 1236 while((pmu_state != idle && pmu_state != locked) || !req->complete) 1237 via_pmu_interrupt(0, NULL, NULL); 1238} 1239 1240/* This function loops until the PMU is idle and prevents it from 1241 * anwsering to ADB interrupts. pmu_request can still be called. 1242 * This is done to avoid spurrious shutdowns when we know we'll have 1243 * interrupts switched off for a long time 1244 */ 1245void 1246pmu_suspend(void) 1247{ 1248 unsigned long flags; 1249#ifdef SUSPEND_USES_PMU 1250 struct adb_request *req; 1251#endif 1252 if (!via) 1253 return; 1254 1255 spin_lock_irqsave(&pmu_lock, flags); 1256 pmu_suspended++; 1257 if (pmu_suspended > 1) { 1258 spin_unlock_irqrestore(&pmu_lock, flags); 1259 return; 1260 } 1261 1262 do { 1263 spin_unlock_irqrestore(&pmu_lock, flags); 1264 if (req_awaiting_reply) 1265 adb_int_pending = 1; 1266 via_pmu_interrupt(0, NULL, NULL); 1267 spin_lock_irqsave(&pmu_lock, flags); 1268 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) { 1269#ifdef SUSPEND_USES_PMU 1270 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 1271 spin_unlock_irqrestore(&pmu_lock, flags); 1272 while(!req.complete) 1273 pmu_poll(); 1274#else /* SUSPEND_USES_PMU */ 1275 if (gpio_irq >= 0) 1276 disable_irq_nosync(gpio_irq); 1277 out_8(&via[IER], CB1_INT | IER_CLR); 1278 spin_unlock_irqrestore(&pmu_lock, flags); 1279#endif /* SUSPEND_USES_PMU */ 1280 break; 1281 } 1282 } while (1); 1283} 1284 1285void 1286pmu_resume(void) 1287{ 1288 unsigned long flags; 1289 1290 if (!via || (pmu_suspended < 1)) 1291 return; 1292 1293 spin_lock_irqsave(&pmu_lock, flags); 1294 pmu_suspended--; 1295 if (pmu_suspended > 0) { 1296 spin_unlock_irqrestore(&pmu_lock, flags); 1297 return; 1298 } 1299 adb_int_pending = 1; 1300#ifdef SUSPEND_USES_PMU 1301 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1302 spin_unlock_irqrestore(&pmu_lock, flags); 1303 while(!req.complete) 1304 pmu_poll(); 1305#else /* SUSPEND_USES_PMU */ 1306 if (gpio_irq >= 0) 1307 enable_irq(gpio_irq); 1308 out_8(&via[IER], CB1_INT | IER_SET); 1309 spin_unlock_irqrestore(&pmu_lock, flags); 1310 pmu_poll(); 1311#endif /* SUSPEND_USES_PMU */ 1312} 1313 1314/* Interrupt data could be the result data from an ADB cmd */ 1315static void 1316pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs) 1317{ 1318 unsigned char ints, pirq; 1319 int i = 0; 1320 1321 asleep = 0; 1322 if (drop_interrupts || len < 1) { 1323 adb_int_pending = 0; 1324 pmu_irq_stats[8]++; 1325 return; 1326 } 1327 1328 /* Get PMU interrupt mask */ 1329 ints = data[0]; 1330 1331 /* Record zero interrupts for stats */ 1332 if (ints == 0) 1333 pmu_irq_stats[9]++; 1334 1335 /* Hack to deal with ADB autopoll flag */ 1336 if (ints & PMU_INT_ADB) 1337 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL); 1338 1339next: 1340 1341 if (ints == 0) { 1342 if (i > pmu_irq_stats[10]) 1343 pmu_irq_stats[10] = i; 1344 return; 1345 } 1346 1347 for (pirq = 0; pirq < 8; pirq++) 1348 if (ints & (1 << pirq)) 1349 break; 1350 pmu_irq_stats[pirq]++; 1351 i++; 1352 ints &= ~(1 << pirq); 1353 1354 /* Note: for some reason, we get an interrupt with len=1, 1355 * data[0]==0 after each normal ADB interrupt, at least 1356 * on the Pismo. Still investigating... --BenH 1357 */ 1358 if ((1 << pirq) & PMU_INT_ADB) { 1359 if ((data[0] & PMU_INT_ADB_AUTO) == 0) { 1360 struct adb_request *req = req_awaiting_reply; 1361 if (req == 0) { 1362 printk(KERN_ERR "PMU: extra ADB reply\n"); 1363 return; 1364 } 1365 req_awaiting_reply = NULL; 1366 if (len <= 2) 1367 req->reply_len = 0; 1368 else { 1369 memcpy(req->reply, data + 1, len - 1); 1370 req->reply_len = len - 1; 1371 } 1372 pmu_done(req); 1373 } else { 1374#if defined(CONFIG_XMON) && !defined(CONFIG_PPC64) 1375 if (len == 4 && data[1] == 0x2c) { 1376 extern int xmon_wants_key, xmon_adb_keycode; 1377 if (xmon_wants_key) { 1378 xmon_adb_keycode = data[2]; 1379 return; 1380 } 1381 } 1382#endif /* defined(CONFIG_XMON) && !defined(CONFIG_PPC64) */ 1383#ifdef CONFIG_ADB 1384 /* 1385 * XXX On the [23]400 the PMU gives us an up 1386 * event for keycodes 0x74 or 0x75 when the PC 1387 * card eject buttons are released, so we 1388 * ignore those events. 1389 */ 1390 if (!(pmu_kind == PMU_OHARE_BASED && len == 4 1391 && data[1] == 0x2c && data[3] == 0xff 1392 && (data[2] & ~1) == 0xf4)) 1393 adb_input(data+1, len-1, regs, 1); 1394#endif /* CONFIG_ADB */ 1395 } 1396 } 1397 /* Sound/brightness button pressed */ 1398 else if ((1 << pirq) & PMU_INT_SNDBRT) { 1399#ifdef CONFIG_PMAC_BACKLIGHT 1400 if (len == 3) 1401#ifdef CONFIG_INPUT_ADBHID 1402 if (!disable_kernel_backlight) 1403#endif /* CONFIG_INPUT_ADBHID */ 1404 set_backlight_level(data[1] >> 4); 1405#endif /* CONFIG_PMAC_BACKLIGHT */ 1406 } 1407 /* Tick interrupt */ 1408 else if ((1 << pirq) & PMU_INT_TICK) { 1409 /* Environement or tick interrupt, query batteries */ 1410 if (pmu_battery_count) { 1411 if ((--query_batt_timer) == 0) { 1412 query_battery_state(); 1413 query_batt_timer = BATTERY_POLLING_COUNT; 1414 } 1415 } 1416 } 1417 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) { 1418 if (pmu_battery_count) 1419 query_battery_state(); 1420 pmu_pass_intr(data, len); 1421 } else { 1422 pmu_pass_intr(data, len); 1423 } 1424 goto next; 1425} 1426 1427static struct adb_request* 1428pmu_sr_intr(struct pt_regs *regs) 1429{ 1430 struct adb_request *req; 1431 int bite = 0; 1432 1433 if (via[B] & TREQ) { 1434 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]); 1435 out_8(&via[IFR], SR_INT); 1436 return NULL; 1437 } 1438 /* The ack may not yet be low when we get the interrupt */ 1439 while ((in_8(&via[B]) & TACK) != 0) 1440 ; 1441 1442 /* if reading grab the byte, and reset the interrupt */ 1443 if (pmu_state == reading || pmu_state == reading_intr) 1444 bite = in_8(&via[SR]); 1445 1446 /* reset TREQ and wait for TACK to go high */ 1447 out_8(&via[B], in_8(&via[B]) | TREQ); 1448 wait_for_ack(); 1449 1450 switch (pmu_state) { 1451 case sending: 1452 req = current_req; 1453 if (data_len < 0) { 1454 data_len = req->nbytes - 1; 1455 send_byte(data_len); 1456 break; 1457 } 1458 if (data_index <= data_len) { 1459 send_byte(req->data[data_index++]); 1460 break; 1461 } 1462 req->sent = 1; 1463 data_len = pmu_data_len[req->data[0]][1]; 1464 if (data_len == 0) { 1465 pmu_state = idle; 1466 current_req = req->next; 1467 if (req->reply_expected) 1468 req_awaiting_reply = req; 1469 else 1470 return req; 1471 } else { 1472 pmu_state = reading; 1473 data_index = 0; 1474 reply_ptr = req->reply + req->reply_len; 1475 recv_byte(); 1476 } 1477 break; 1478 1479 case intack: 1480 data_index = 0; 1481 data_len = -1; 1482 pmu_state = reading_intr; 1483 reply_ptr = interrupt_data[int_data_last]; 1484 recv_byte(); 1485 if (gpio_irq >= 0 && !gpio_irq_enabled) { 1486 enable_irq(gpio_irq); 1487 gpio_irq_enabled = 1; 1488 } 1489 break; 1490 1491 case reading: 1492 case reading_intr: 1493 if (data_len == -1) { 1494 data_len = bite; 1495 if (bite > 32) 1496 printk(KERN_ERR "PMU: bad reply len %d\n", bite); 1497 } else if (data_index < 32) { 1498 reply_ptr[data_index++] = bite; 1499 } 1500 if (data_index < data_len) { 1501 recv_byte(); 1502 break; 1503 } 1504 1505 if (pmu_state == reading_intr) { 1506 pmu_state = idle; 1507 int_data_state[int_data_last] = int_data_ready; 1508 interrupt_data_len[int_data_last] = data_len; 1509 } else { 1510 req = current_req; 1511 /* 1512 * For PMU sleep and freq change requests, we lock the 1513 * PMU until it's explicitely unlocked. This avoids any 1514 * spurrious event polling getting in 1515 */ 1516 current_req = req->next; 1517 req->reply_len += data_index; 1518 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED) 1519 pmu_state = locked; 1520 else 1521 pmu_state = idle; 1522 return req; 1523 } 1524 break; 1525 1526 default: 1527 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n", 1528 pmu_state); 1529 } 1530 return NULL; 1531} 1532 1533static irqreturn_t 1534via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs) 1535{ 1536 unsigned long flags; 1537 int intr; 1538 int nloop = 0; 1539 int int_data = -1; 1540 struct adb_request *req = NULL; 1541 int handled = 0; 1542 1543 /* This is a bit brutal, we can probably do better */ 1544 spin_lock_irqsave(&pmu_lock, flags); 1545 ++disable_poll; 1546 1547 for (;;) { 1548 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT); 1549 if (intr == 0) 1550 break; 1551 handled = 1; 1552 if (++nloop > 1000) { 1553 printk(KERN_DEBUG "PMU: stuck in intr loop, " 1554 "intr=%x, ier=%x pmu_state=%d\n", 1555 intr, in_8(&via[IER]), pmu_state); 1556 break; 1557 } 1558 out_8(&via[IFR], intr); 1559 if (intr & CB1_INT) { 1560 adb_int_pending = 1; 1561 pmu_irq_stats[0]++; 1562 } 1563 if (intr & SR_INT) { 1564 req = pmu_sr_intr(regs); 1565 if (req) 1566 break; 1567 } 1568 } 1569 1570recheck: 1571 if (pmu_state == idle) { 1572 if (adb_int_pending) { 1573 if (int_data_state[0] == int_data_empty) 1574 int_data_last = 0; 1575 else if (int_data_state[1] == int_data_empty) 1576 int_data_last = 1; 1577 else 1578 goto no_free_slot; 1579 pmu_state = intack; 1580 int_data_state[int_data_last] = int_data_fill; 1581 /* Sounds safer to make sure ACK is high before writing. 1582 * This helped kill a problem with ADB and some iBooks 1583 */ 1584 wait_for_ack(); 1585 send_byte(PMU_INT_ACK); 1586 adb_int_pending = 0; 1587 } else if (current_req) 1588 pmu_start(); 1589 } 1590no_free_slot: 1591 /* Mark the oldest buffer for flushing */ 1592 if (int_data_state[!int_data_last] == int_data_ready) { 1593 int_data_state[!int_data_last] = int_data_flush; 1594 int_data = !int_data_last; 1595 } else if (int_data_state[int_data_last] == int_data_ready) { 1596 int_data_state[int_data_last] = int_data_flush; 1597 int_data = int_data_last; 1598 } 1599 --disable_poll; 1600 spin_unlock_irqrestore(&pmu_lock, flags); 1601 1602 /* Deal with completed PMU requests outside of the lock */ 1603 if (req) { 1604 pmu_done(req); 1605 req = NULL; 1606 } 1607 1608 /* Deal with interrupt datas outside of the lock */ 1609 if (int_data >= 0) { 1610 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs); 1611 spin_lock_irqsave(&pmu_lock, flags); 1612 ++disable_poll; 1613 int_data_state[int_data] = int_data_empty; 1614 int_data = -1; 1615 goto recheck; 1616 } 1617 1618 return IRQ_RETVAL(handled); 1619} 1620 1621void 1622pmu_unlock(void) 1623{ 1624 unsigned long flags; 1625 1626 spin_lock_irqsave(&pmu_lock, flags); 1627 if (pmu_state == locked) 1628 pmu_state = idle; 1629 adb_int_pending = 1; 1630 spin_unlock_irqrestore(&pmu_lock, flags); 1631} 1632 1633 1634static irqreturn_t 1635gpio1_interrupt(int irq, void *arg, struct pt_regs *regs) 1636{ 1637 unsigned long flags; 1638 1639 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) { 1640 spin_lock_irqsave(&pmu_lock, flags); 1641 if (gpio_irq_enabled > 0) { 1642 disable_irq_nosync(gpio_irq); 1643 gpio_irq_enabled = 0; 1644 } 1645 pmu_irq_stats[1]++; 1646 adb_int_pending = 1; 1647 spin_unlock_irqrestore(&pmu_lock, flags); 1648 via_pmu_interrupt(0, NULL, NULL); 1649 return IRQ_HANDLED; 1650 } 1651 return IRQ_NONE; 1652} 1653 1654#ifdef CONFIG_PMAC_BACKLIGHT 1655static int backlight_to_bright[] = { 1656 0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e, 1657 0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e 1658}; 1659 1660static int 1661pmu_set_backlight_enable(int on, int level, void* data) 1662{ 1663 struct adb_request req; 1664 1665 if (vias == NULL) 1666 return -ENODEV; 1667 1668 if (on) { 1669 pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT, 1670 backlight_to_bright[level]); 1671 pmu_wait_complete(&req); 1672 } 1673 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1674 PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF)); 1675 pmu_wait_complete(&req); 1676 1677 return 0; 1678} 1679 1680static void 1681pmu_bright_complete(struct adb_request *req) 1682{ 1683 if (req == &bright_req_1) 1684 clear_bit(1, &async_req_locks); 1685 if (req == &bright_req_2) 1686 clear_bit(2, &async_req_locks); 1687} 1688 1689static int 1690pmu_set_backlight_level(int level, void* data) 1691{ 1692 if (vias == NULL) 1693 return -ENODEV; 1694 1695 if (test_and_set_bit(1, &async_req_locks)) 1696 return -EAGAIN; 1697 pmu_request(&bright_req_1, pmu_bright_complete, 2, PMU_BACKLIGHT_BRIGHT, 1698 backlight_to_bright[level]); 1699 if (test_and_set_bit(2, &async_req_locks)) 1700 return -EAGAIN; 1701 pmu_request(&bright_req_2, pmu_bright_complete, 2, PMU_POWER_CTRL, 1702 PMU_POW_BACKLIGHT | (level > BACKLIGHT_OFF ? 1703 PMU_POW_ON : PMU_POW_OFF)); 1704 1705 return 0; 1706} 1707#endif /* CONFIG_PMAC_BACKLIGHT */ 1708 1709void 1710pmu_enable_irled(int on) 1711{ 1712 struct adb_request req; 1713 1714 if (vias == NULL) 1715 return ; 1716 if (pmu_kind == PMU_KEYLARGO_BASED) 1717 return ; 1718 1719 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED | 1720 (on ? PMU_POW_ON : PMU_POW_OFF)); 1721 pmu_wait_complete(&req); 1722} 1723 1724void 1725pmu_restart(void) 1726{ 1727 struct adb_request req; 1728 1729 if (via == NULL) 1730 return; 1731 1732 local_irq_disable(); 1733 1734 drop_interrupts = 1; 1735 1736 if (pmu_kind != PMU_KEYLARGO_BASED) { 1737 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1738 PMU_INT_TICK ); 1739 while(!req.complete) 1740 pmu_poll(); 1741 } 1742 1743 pmu_request(&req, NULL, 1, PMU_RESET); 1744 pmu_wait_complete(&req); 1745 for (;;) 1746 ; 1747} 1748 1749void 1750pmu_shutdown(void) 1751{ 1752 struct adb_request req; 1753 1754 if (via == NULL) 1755 return; 1756 1757 local_irq_disable(); 1758 1759 drop_interrupts = 1; 1760 1761 if (pmu_kind != PMU_KEYLARGO_BASED) { 1762 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1763 PMU_INT_TICK ); 1764 pmu_wait_complete(&req); 1765 } else { 1766 /* Disable server mode on shutdown or we'll just 1767 * wake up again 1768 */ 1769 pmu_set_server_mode(0); 1770 } 1771 1772 pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 1773 'M', 'A', 'T', 'T'); 1774 pmu_wait_complete(&req); 1775 for (;;) 1776 ; 1777} 1778 1779int 1780pmu_present(void) 1781{ 1782 return via != 0; 1783} 1784 1785struct pmu_i2c_hdr { 1786 u8 bus; 1787 u8 mode; 1788 u8 bus2; 1789 u8 address; 1790 u8 sub_addr; 1791 u8 comb_addr; 1792 u8 count; 1793}; 1794 1795int 1796pmu_i2c_combined_read(int bus, int addr, int subaddr, u8* data, int len) 1797{ 1798 struct adb_request req; 1799 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1]; 1800 int retry; 1801 int rc; 1802 1803 for (retry=0; retry<16; retry++) { 1804 memset(&req, 0, sizeof(req)); 1805 1806 hdr->bus = bus; 1807 hdr->address = addr & 0xfe; 1808 hdr->mode = PMU_I2C_MODE_COMBINED; 1809 hdr->bus2 = 0; 1810 hdr->sub_addr = subaddr; 1811 hdr->comb_addr = addr | 1; 1812 hdr->count = len; 1813 1814 req.nbytes = sizeof(struct pmu_i2c_hdr) + 1; 1815 req.reply_expected = 0; 1816 req.reply_len = 0; 1817 req.data[0] = PMU_I2C_CMD; 1818 req.reply[0] = 0xff; 1819 rc = pmu_queue_request(&req); 1820 if (rc) 1821 return rc; 1822 while(!req.complete) 1823 pmu_poll(); 1824 if (req.reply[0] == PMU_I2C_STATUS_OK) 1825 break; 1826 mdelay(15); 1827 } 1828 if (req.reply[0] != PMU_I2C_STATUS_OK) 1829 return -1; 1830 1831 for (retry=0; retry<16; retry++) { 1832 memset(&req, 0, sizeof(req)); 1833 1834 mdelay(15); 1835 1836 hdr->bus = PMU_I2C_BUS_STATUS; 1837 req.reply[0] = 0xff; 1838 1839 req.nbytes = 2; 1840 req.reply_expected = 0; 1841 req.reply_len = 0; 1842 req.data[0] = PMU_I2C_CMD; 1843 rc = pmu_queue_request(&req); 1844 if (rc) 1845 return rc; 1846 while(!req.complete) 1847 pmu_poll(); 1848 if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) { 1849 memcpy(data, &req.reply[1], req.reply_len - 1); 1850 return req.reply_len - 1; 1851 } 1852 } 1853 return -1; 1854} 1855 1856int 1857pmu_i2c_stdsub_write(int bus, int addr, int subaddr, u8* data, int len) 1858{ 1859 struct adb_request req; 1860 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1]; 1861 int retry; 1862 int rc; 1863 1864 for (retry=0; retry<16; retry++) { 1865 memset(&req, 0, sizeof(req)); 1866 1867 hdr->bus = bus; 1868 hdr->address = addr & 0xfe; 1869 hdr->mode = PMU_I2C_MODE_STDSUB; 1870 hdr->bus2 = 0; 1871 hdr->sub_addr = subaddr; 1872 hdr->comb_addr = addr & 0xfe; 1873 hdr->count = len; 1874 1875 req.data[0] = PMU_I2C_CMD; 1876 memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len); 1877 req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1; 1878 req.reply_expected = 0; 1879 req.reply_len = 0; 1880 req.reply[0] = 0xff; 1881 rc = pmu_queue_request(&req); 1882 if (rc) 1883 return rc; 1884 while(!req.complete) 1885 pmu_poll(); 1886 if (req.reply[0] == PMU_I2C_STATUS_OK) 1887 break; 1888 mdelay(15); 1889 } 1890 if (req.reply[0] != PMU_I2C_STATUS_OK) 1891 return -1; 1892 1893 for (retry=0; retry<16; retry++) { 1894 memset(&req, 0, sizeof(req)); 1895 1896 mdelay(15); 1897 1898 hdr->bus = PMU_I2C_BUS_STATUS; 1899 req.reply[0] = 0xff; 1900 1901 req.nbytes = 2; 1902 req.reply_expected = 0; 1903 req.reply_len = 0; 1904 req.data[0] = PMU_I2C_CMD; 1905 rc = pmu_queue_request(&req); 1906 if (rc) 1907 return rc; 1908 while(!req.complete) 1909 pmu_poll(); 1910 if (req.reply[0] == PMU_I2C_STATUS_OK) 1911 return len; 1912 } 1913 return -1; 1914} 1915 1916int 1917pmu_i2c_simple_read(int bus, int addr, u8* data, int len) 1918{ 1919 struct adb_request req; 1920 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1]; 1921 int retry; 1922 int rc; 1923 1924 for (retry=0; retry<16; retry++) { 1925 memset(&req, 0, sizeof(req)); 1926 1927 hdr->bus = bus; 1928 hdr->address = addr | 1; 1929 hdr->mode = PMU_I2C_MODE_SIMPLE; 1930 hdr->bus2 = 0; 1931 hdr->sub_addr = 0; 1932 hdr->comb_addr = 0; 1933 hdr->count = len; 1934 1935 req.data[0] = PMU_I2C_CMD; 1936 req.nbytes = sizeof(struct pmu_i2c_hdr) + 1; 1937 req.reply_expected = 0; 1938 req.reply_len = 0; 1939 req.reply[0] = 0xff; 1940 rc = pmu_queue_request(&req); 1941 if (rc) 1942 return rc; 1943 while(!req.complete) 1944 pmu_poll(); 1945 if (req.reply[0] == PMU_I2C_STATUS_OK) 1946 break; 1947 mdelay(15); 1948 } 1949 if (req.reply[0] != PMU_I2C_STATUS_OK) 1950 return -1; 1951 1952 for (retry=0; retry<16; retry++) { 1953 memset(&req, 0, sizeof(req)); 1954 1955 mdelay(15); 1956 1957 hdr->bus = PMU_I2C_BUS_STATUS; 1958 req.reply[0] = 0xff; 1959 1960 req.nbytes = 2; 1961 req.reply_expected = 0; 1962 req.reply_len = 0; 1963 req.data[0] = PMU_I2C_CMD; 1964 rc = pmu_queue_request(&req); 1965 if (rc) 1966 return rc; 1967 while(!req.complete) 1968 pmu_poll(); 1969 if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) { 1970 memcpy(data, &req.reply[1], req.reply_len - 1); 1971 return req.reply_len - 1; 1972 } 1973 } 1974 return -1; 1975} 1976 1977int 1978pmu_i2c_simple_write(int bus, int addr, u8* data, int len) 1979{ 1980 struct adb_request req; 1981 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1]; 1982 int retry; 1983 int rc; 1984 1985 for (retry=0; retry<16; retry++) { 1986 memset(&req, 0, sizeof(req)); 1987 1988 hdr->bus = bus; 1989 hdr->address = addr & 0xfe; 1990 hdr->mode = PMU_I2C_MODE_SIMPLE; 1991 hdr->bus2 = 0; 1992 hdr->sub_addr = 0; 1993 hdr->comb_addr = 0; 1994 hdr->count = len; 1995 1996 req.data[0] = PMU_I2C_CMD; 1997 memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len); 1998 req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1; 1999 req.reply_expected = 0; 2000 req.reply_len = 0; 2001 req.reply[0] = 0xff; 2002 rc = pmu_queue_request(&req); 2003 if (rc) 2004 return rc; 2005 while(!req.complete) 2006 pmu_poll(); 2007 if (req.reply[0] == PMU_I2C_STATUS_OK) 2008 break; 2009 mdelay(15); 2010 } 2011 if (req.reply[0] != PMU_I2C_STATUS_OK) 2012 return -1; 2013 2014 for (retry=0; retry<16; retry++) { 2015 memset(&req, 0, sizeof(req)); 2016 2017 mdelay(15); 2018 2019 hdr->bus = PMU_I2C_BUS_STATUS; 2020 req.reply[0] = 0xff; 2021 2022 req.nbytes = 2; 2023 req.reply_expected = 0; 2024 req.reply_len = 0; 2025 req.data[0] = PMU_I2C_CMD; 2026 rc = pmu_queue_request(&req); 2027 if (rc) 2028 return rc; 2029 while(!req.complete) 2030 pmu_poll(); 2031 if (req.reply[0] == PMU_I2C_STATUS_OK) 2032 return len; 2033 } 2034 return -1; 2035} 2036 2037#ifdef CONFIG_PM 2038 2039static LIST_HEAD(sleep_notifiers); 2040 2041int 2042pmu_register_sleep_notifier(struct pmu_sleep_notifier *n) 2043{ 2044 struct list_head *list; 2045 struct pmu_sleep_notifier *notifier; 2046 2047 for (list = sleep_notifiers.next; list != &sleep_notifiers; 2048 list = list->next) { 2049 notifier = list_entry(list, struct pmu_sleep_notifier, list); 2050 if (n->priority > notifier->priority) 2051 break; 2052 } 2053 __list_add(&n->list, list->prev, list); 2054 return 0; 2055} 2056EXPORT_SYMBOL(pmu_register_sleep_notifier); 2057 2058int 2059pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n) 2060{ 2061 if (n->list.next == 0) 2062 return -ENOENT; 2063 list_del(&n->list); 2064 n->list.next = NULL; 2065 return 0; 2066} 2067EXPORT_SYMBOL(pmu_unregister_sleep_notifier); 2068#endif /* CONFIG_PM */ 2069 2070#if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2071 2072/* Sleep is broadcast last-to-first */ 2073static int 2074broadcast_sleep(int when, int fallback) 2075{ 2076 int ret = PBOOK_SLEEP_OK; 2077 struct list_head *list; 2078 struct pmu_sleep_notifier *notifier; 2079 2080 for (list = sleep_notifiers.prev; list != &sleep_notifiers; 2081 list = list->prev) { 2082 notifier = list_entry(list, struct pmu_sleep_notifier, list); 2083 ret = notifier->notifier_call(notifier, when); 2084 if (ret != PBOOK_SLEEP_OK) { 2085 printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n", 2086 when, notifier, notifier->notifier_call); 2087 for (; list != &sleep_notifiers; list = list->next) { 2088 notifier = list_entry(list, struct pmu_sleep_notifier, list); 2089 notifier->notifier_call(notifier, fallback); 2090 } 2091 return ret; 2092 } 2093 } 2094 return ret; 2095} 2096 2097/* Wake is broadcast first-to-last */ 2098static int 2099broadcast_wake(void) 2100{ 2101 int ret = PBOOK_SLEEP_OK; 2102 struct list_head *list; 2103 struct pmu_sleep_notifier *notifier; 2104 2105 for (list = sleep_notifiers.next; list != &sleep_notifiers; 2106 list = list->next) { 2107 notifier = list_entry(list, struct pmu_sleep_notifier, list); 2108 notifier->notifier_call(notifier, PBOOK_WAKE); 2109 } 2110 return ret; 2111} 2112 2113/* 2114 * This struct is used to store config register values for 2115 * PCI devices which may get powered off when we sleep. 2116 */ 2117static struct pci_save { 2118#ifndef HACKED_PCI_SAVE 2119 u16 command; 2120 u16 cache_lat; 2121 u16 intr; 2122 u32 rom_address; 2123#else 2124 u32 config[16]; 2125#endif 2126} *pbook_pci_saves; 2127static int pbook_npci_saves; 2128 2129static void 2130pbook_alloc_pci_save(void) 2131{ 2132 int npci; 2133 struct pci_dev *pd = NULL; 2134 2135 npci = 0; 2136 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 2137 ++npci; 2138 } 2139 if (npci == 0) 2140 return; 2141 pbook_pci_saves = (struct pci_save *) 2142 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL); 2143 pbook_npci_saves = npci; 2144} 2145 2146static void 2147pbook_free_pci_save(void) 2148{ 2149 if (pbook_pci_saves == NULL) 2150 return; 2151 kfree(pbook_pci_saves); 2152 pbook_pci_saves = NULL; 2153 pbook_npci_saves = 0; 2154} 2155 2156static void 2157pbook_pci_save(void) 2158{ 2159 struct pci_save *ps = pbook_pci_saves; 2160 struct pci_dev *pd = NULL; 2161 int npci = pbook_npci_saves; 2162 2163 if (ps == NULL) 2164 return; 2165 2166 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 2167 if (npci-- == 0) 2168 return; 2169#ifndef HACKED_PCI_SAVE 2170 pci_read_config_word(pd, PCI_COMMAND, &ps->command); 2171 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat); 2172 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr); 2173 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address); 2174#else 2175 int i; 2176 for (i=1;i<16;i++) 2177 pci_read_config_dword(pd, i<<4, &ps->config[i]); 2178#endif 2179 ++ps; 2180 } 2181} 2182 2183/* For this to work, we must take care of a few things: If gmac was enabled 2184 * during boot, it will be in the pci dev list. If it's disabled at this point 2185 * (and it will probably be), then you can't access it's config space. 2186 */ 2187static void 2188pbook_pci_restore(void) 2189{ 2190 u16 cmd; 2191 struct pci_save *ps = pbook_pci_saves - 1; 2192 struct pci_dev *pd = NULL; 2193 int npci = pbook_npci_saves; 2194 int j; 2195 2196 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 2197#ifdef HACKED_PCI_SAVE 2198 int i; 2199 if (npci-- == 0) 2200 return; 2201 ps++; 2202 for (i=2;i<16;i++) 2203 pci_write_config_dword(pd, i<<4, ps->config[i]); 2204 pci_write_config_dword(pd, 4, ps->config[1]); 2205#else 2206 if (npci-- == 0) 2207 return; 2208 ps++; 2209 if (ps->command == 0) 2210 continue; 2211 pci_read_config_word(pd, PCI_COMMAND, &cmd); 2212 if ((ps->command & ~cmd) == 0) 2213 continue; 2214 switch (pd->hdr_type) { 2215 case PCI_HEADER_TYPE_NORMAL: 2216 for (j = 0; j < 6; ++j) 2217 pci_write_config_dword(pd, 2218 PCI_BASE_ADDRESS_0 + j*4, 2219 pd->resource[j].start); 2220 pci_write_config_dword(pd, PCI_ROM_ADDRESS, 2221 ps->rom_address); 2222 pci_write_config_word(pd, PCI_CACHE_LINE_SIZE, 2223 ps->cache_lat); 2224 pci_write_config_word(pd, PCI_INTERRUPT_LINE, 2225 ps->intr); 2226 pci_write_config_word(pd, PCI_COMMAND, ps->command); 2227 break; 2228 } 2229#endif 2230 } 2231} 2232 2233#ifdef DEBUG_SLEEP 2234/* N.B. This doesn't work on the 3400 */ 2235void 2236pmu_blink(int n) 2237{ 2238 struct adb_request req; 2239 2240 memset(&req, 0, sizeof(req)); 2241 2242 for (; n > 0; --n) { 2243 req.nbytes = 4; 2244 req.done = NULL; 2245 req.data[0] = 0xee; 2246 req.data[1] = 4; 2247 req.data[2] = 0; 2248 req.data[3] = 1; 2249 req.reply[0] = ADB_RET_OK; 2250 req.reply_len = 1; 2251 req.reply_expected = 0; 2252 pmu_polled_request(&req); 2253 mdelay(50); 2254 req.nbytes = 4; 2255 req.done = NULL; 2256 req.data[0] = 0xee; 2257 req.data[1] = 4; 2258 req.data[2] = 0; 2259 req.data[3] = 0; 2260 req.reply[0] = ADB_RET_OK; 2261 req.reply_len = 1; 2262 req.reply_expected = 0; 2263 pmu_polled_request(&req); 2264 mdelay(50); 2265 } 2266 mdelay(50); 2267} 2268#endif 2269 2270/* 2271 * Put the powerbook to sleep. 2272 */ 2273 2274static u32 save_via[8]; 2275 2276static void 2277save_via_state(void) 2278{ 2279 save_via[0] = in_8(&via[ANH]); 2280 save_via[1] = in_8(&via[DIRA]); 2281 save_via[2] = in_8(&via[B]); 2282 save_via[3] = in_8(&via[DIRB]); 2283 save_via[4] = in_8(&via[PCR]); 2284 save_via[5] = in_8(&via[ACR]); 2285 save_via[6] = in_8(&via[T1CL]); 2286 save_via[7] = in_8(&via[T1CH]); 2287} 2288static void 2289restore_via_state(void) 2290{ 2291 out_8(&via[ANH], save_via[0]); 2292 out_8(&via[DIRA], save_via[1]); 2293 out_8(&via[B], save_via[2]); 2294 out_8(&via[DIRB], save_via[3]); 2295 out_8(&via[PCR], save_via[4]); 2296 out_8(&via[ACR], save_via[5]); 2297 out_8(&via[T1CL], save_via[6]); 2298 out_8(&via[T1CH], save_via[7]); 2299 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 2300 out_8(&via[IFR], 0x7f); /* clear IFR */ 2301 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 2302} 2303 2304static int 2305pmac_suspend_devices(void) 2306{ 2307 int ret; 2308 2309 pm_prepare_console(); 2310 2311 /* Notify old-style device drivers & userland */ 2312 ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT); 2313 if (ret != PBOOK_SLEEP_OK) { 2314 printk(KERN_ERR "Sleep rejected by drivers\n"); 2315 return -EBUSY; 2316 } 2317 2318 /* Sync the disks. */ 2319 /* XXX It would be nice to have some way to ensure that 2320 * nobody is dirtying any new buffers while we wait. That 2321 * could be achieved using the refrigerator for processes 2322 * that swsusp uses 2323 */ 2324 sys_sync(); 2325 2326 /* Sleep can fail now. May not be very robust but useful for debugging */ 2327 ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE); 2328 if (ret != PBOOK_SLEEP_OK) { 2329 printk(KERN_ERR "Driver sleep failed\n"); 2330 return -EBUSY; 2331 } 2332 2333 /* Send suspend call to devices, hold the device core's dpm_sem */ 2334 ret = device_suspend(PMSG_SUSPEND); 2335 if (ret) { 2336 broadcast_wake(); 2337 printk(KERN_ERR "Driver sleep failed\n"); 2338 return -EBUSY; 2339 } 2340 2341 /* Disable clock spreading on some machines */ 2342 pmac_tweak_clock_spreading(0); 2343 2344 /* Stop preemption */ 2345 preempt_disable(); 2346 2347 /* Make sure the decrementer won't interrupt us */ 2348 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 2349 /* Make sure any pending DEC interrupt occurring while we did 2350 * the above didn't re-enable the DEC */ 2351 mb(); 2352 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 2353 2354 /* We can now disable MSR_EE. This code of course works properly only 2355 * on UP machines... For SMP, if we ever implement sleep, we'll have to 2356 * stop the "other" CPUs way before we do all that stuff. 2357 */ 2358 local_irq_disable(); 2359 2360 /* Broadcast power down irq 2361 * This isn't that useful in most cases (only directly wired devices can 2362 * use this but still... This will take care of sysdev's as well, so 2363 * we exit from here with local irqs disabled and PIC off. 2364 */ 2365 ret = device_power_down(PMSG_SUSPEND); 2366 if (ret) { 2367 wakeup_decrementer(); 2368 local_irq_enable(); 2369 preempt_enable(); 2370 device_resume(); 2371 broadcast_wake(); 2372 printk(KERN_ERR "Driver powerdown failed\n"); 2373 return -EBUSY; 2374 } 2375 2376 /* Wait for completion of async backlight requests */ 2377 while (!bright_req_1.complete || !bright_req_2.complete || 2378 !batt_req.complete) 2379 pmu_poll(); 2380 2381 /* Giveup the lazy FPU & vec so we don't have to back them 2382 * up from the low level code 2383 */ 2384 enable_kernel_fp(); 2385 2386#ifdef CONFIG_ALTIVEC 2387 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 2388 enable_kernel_altivec(); 2389#endif /* CONFIG_ALTIVEC */ 2390 2391 return 0; 2392} 2393 2394static int 2395pmac_wakeup_devices(void) 2396{ 2397 mdelay(100); 2398 2399 /* Power back up system devices (including the PIC) */ 2400 device_power_up(); 2401 2402 /* Force a poll of ADB interrupts */ 2403 adb_int_pending = 1; 2404 via_pmu_interrupt(0, NULL, NULL); 2405 2406 /* Restart jiffies & scheduling */ 2407 wakeup_decrementer(); 2408 2409 /* Re-enable local CPU interrupts */ 2410 local_irq_enable(); 2411 mdelay(10); 2412 preempt_enable(); 2413 2414 /* Re-enable clock spreading on some machines */ 2415 pmac_tweak_clock_spreading(1); 2416 2417 /* Resume devices */ 2418 device_resume(); 2419 2420 /* Notify old style drivers */ 2421 broadcast_wake(); 2422 2423 pm_restore_console(); 2424 2425 return 0; 2426} 2427 2428#define GRACKLE_PM (1<<7) 2429#define GRACKLE_DOZE (1<<5) 2430#define GRACKLE_NAP (1<<4) 2431#define GRACKLE_SLEEP (1<<3) 2432 2433int 2434powerbook_sleep_grackle(void) 2435{ 2436 unsigned long save_l2cr; 2437 unsigned short pmcr1; 2438 struct adb_request req; 2439 int ret; 2440 struct pci_dev *grackle; 2441 2442 grackle = pci_find_slot(0, 0); 2443 if (!grackle) 2444 return -ENODEV; 2445 2446 ret = pmac_suspend_devices(); 2447 if (ret) { 2448 printk(KERN_ERR "Sleep rejected by devices\n"); 2449 return ret; 2450 } 2451 2452 /* Turn off various things. Darwin does some retry tests here... */ 2453 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE); 2454 pmu_wait_complete(&req); 2455 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 2456 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY); 2457 pmu_wait_complete(&req); 2458 2459 /* For 750, save backside cache setting and disable it */ 2460 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 2461 2462 if (!__fake_sleep) { 2463 /* Ask the PMU to put us to sleep */ 2464 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2465 pmu_wait_complete(&req); 2466 } 2467 2468 /* The VIA is supposed not to be restored correctly*/ 2469 save_via_state(); 2470 /* We shut down some HW */ 2471 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 2472 2473 pci_read_config_word(grackle, 0x70, &pmcr1); 2474 /* Apparently, MacOS uses NAP mode for Grackle ??? */ 2475 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 2476 pmcr1 |= GRACKLE_PM|GRACKLE_NAP; 2477 pci_write_config_word(grackle, 0x70, pmcr1); 2478 2479 /* Call low-level ASM sleep handler */ 2480 if (__fake_sleep) 2481 mdelay(5000); 2482 else 2483 low_sleep_handler(); 2484 2485 /* We're awake again, stop grackle PM */ 2486 pci_read_config_word(grackle, 0x70, &pmcr1); 2487 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 2488 pci_write_config_word(grackle, 0x70, pmcr1); 2489 2490 /* Make sure the PMU is idle */ 2491 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 2492 restore_via_state(); 2493 2494 /* Restore L2 cache */ 2495 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2496 _set_L2CR(save_l2cr); 2497 2498 /* Restore userland MMU context */ 2499 set_context(current->active_mm->context, current->active_mm->pgd); 2500 2501 /* Power things up */ 2502 pmu_unlock(); 2503 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2504 pmu_wait_complete(&req); 2505 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, 2506 PMU_POW0_ON|PMU_POW0_HARD_DRIVE); 2507 pmu_wait_complete(&req); 2508 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 2509 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY); 2510 pmu_wait_complete(&req); 2511 2512 pmac_wakeup_devices(); 2513 2514 return 0; 2515} 2516 2517static int 2518powerbook_sleep_Core99(void) 2519{ 2520 unsigned long save_l2cr; 2521 unsigned long save_l3cr; 2522 struct adb_request req; 2523 int ret; 2524 2525 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) { 2526 printk(KERN_ERR "Sleep mode not supported on this machine\n"); 2527 return -ENOSYS; 2528 } 2529 2530 if (num_online_cpus() > 1 || cpu_is_offline(0)) 2531 return -EAGAIN; 2532 2533 ret = pmac_suspend_devices(); 2534 if (ret) { 2535 printk(KERN_ERR "Sleep rejected by devices\n"); 2536 return ret; 2537 } 2538 2539 /* Stop environment and ADB interrupts */ 2540 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 2541 pmu_wait_complete(&req); 2542 2543 /* Tell PMU what events will wake us up */ 2544 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS, 2545 0xff, 0xff); 2546 pmu_wait_complete(&req); 2547 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS, 2548 0, PMU_PWR_WAKEUP_KEY | 2549 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0)); 2550 pmu_wait_complete(&req); 2551 2552 /* Save the state of the L2 and L3 caches */ 2553 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */ 2554 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 2555 2556 if (!__fake_sleep) { 2557 /* Ask the PMU to put us to sleep */ 2558 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2559 pmu_wait_complete(&req); 2560 } 2561 2562 /* The VIA is supposed not to be restored correctly*/ 2563 save_via_state(); 2564 2565 /* Shut down various ASICs. There's a chance that we can no longer 2566 * talk to the PMU after this, so I moved it to _after_ sending the 2567 * sleep command to it. Still need to be checked. 2568 */ 2569 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 2570 2571 /* Call low-level ASM sleep handler */ 2572 if (__fake_sleep) 2573 mdelay(5000); 2574 else 2575 low_sleep_handler(); 2576 2577 /* Restore Apple core ASICs state */ 2578 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 2579 2580 /* Restore VIA */ 2581 restore_via_state(); 2582 2583 /* tweak LPJ before cpufreq is there */ 2584 loops_per_jiffy *= 2; 2585 2586 /* Restore video */ 2587 pmac_call_early_video_resume(); 2588 2589 /* Restore L2 cache */ 2590 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2591 _set_L2CR(save_l2cr); 2592 /* Restore L3 cache */ 2593 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0) 2594 _set_L3CR(save_l3cr); 2595 2596 /* Restore userland MMU context */ 2597 set_context(current->active_mm->context, current->active_mm->pgd); 2598 2599 /* Tell PMU we are ready */ 2600 pmu_unlock(); 2601 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2602 pmu_wait_complete(&req); 2603 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2604 pmu_wait_complete(&req); 2605 2606 /* Restore LPJ, cpufreq will adjust the cpu frequency */ 2607 loops_per_jiffy /= 2; 2608 2609 pmac_wakeup_devices(); 2610 2611 return 0; 2612} 2613 2614#define PB3400_MEM_CTRL 0xf8000000 2615#define PB3400_MEM_CTRL_SLEEP 0x70 2616 2617static int 2618powerbook_sleep_3400(void) 2619{ 2620 int ret, i, x; 2621 unsigned int hid0; 2622 unsigned long p; 2623 struct adb_request sleep_req; 2624 void __iomem *mem_ctrl; 2625 unsigned int __iomem *mem_ctrl_sleep; 2626 2627 /* first map in the memory controller registers */ 2628 mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100); 2629 if (mem_ctrl == NULL) { 2630 printk("powerbook_sleep_3400: ioremap failed\n"); 2631 return -ENOMEM; 2632 } 2633 mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP; 2634 2635 /* Allocate room for PCI save */ 2636 pbook_alloc_pci_save(); 2637 2638 ret = pmac_suspend_devices(); 2639 if (ret) { 2640 pbook_free_pci_save(); 2641 printk(KERN_ERR "Sleep rejected by devices\n"); 2642 return ret; 2643 } 2644 2645 /* Save the state of PCI config space for some slots */ 2646 pbook_pci_save(); 2647 2648 /* Set the memory controller to keep the memory refreshed 2649 while we're asleep */ 2650 for (i = 0x403f; i >= 0x4000; --i) { 2651 out_be32(mem_ctrl_sleep, i); 2652 do { 2653 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff; 2654 } while (x == 0); 2655 if (x >= 0x100) 2656 break; 2657 } 2658 2659 /* Ask the PMU to put us to sleep */ 2660 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2661 while (!sleep_req.complete) 2662 mb(); 2663 2664 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 2665 2666 /* displacement-flush the L2 cache - necessary? */ 2667 for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000) 2668 i = *(volatile int *)p; 2669 asleep = 1; 2670 2671 /* Put the CPU into sleep mode */ 2672 hid0 = mfspr(SPRN_HID0); 2673 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP; 2674 mtspr(SPRN_HID0, hid0); 2675 mtmsr(mfmsr() | MSR_POW | MSR_EE); 2676 udelay(10); 2677 2678 /* OK, we're awake again, start restoring things */ 2679 out_be32(mem_ctrl_sleep, 0x3f); 2680 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 2681 pbook_pci_restore(); 2682 pmu_unlock(); 2683 2684 /* wait for the PMU interrupt sequence to complete */ 2685 while (asleep) 2686 mb(); 2687 2688 pmac_wakeup_devices(); 2689 pbook_free_pci_save(); 2690 iounmap(mem_ctrl); 2691 2692 return 0; 2693} 2694 2695#endif /* CONFIG_PM && CONFIG_PPC32 */ 2696 2697/* 2698 * Support for /dev/pmu device 2699 */ 2700#define RB_SIZE 0x10 2701struct pmu_private { 2702 struct list_head list; 2703 int rb_get; 2704 int rb_put; 2705 struct rb_entry { 2706 unsigned short len; 2707 unsigned char data[16]; 2708 } rb_buf[RB_SIZE]; 2709 wait_queue_head_t wait; 2710 spinlock_t lock; 2711#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2712 int backlight_locker; 2713#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 2714}; 2715 2716static LIST_HEAD(all_pmu_pvt); 2717static DEFINE_SPINLOCK(all_pvt_lock); 2718 2719static void 2720pmu_pass_intr(unsigned char *data, int len) 2721{ 2722 struct pmu_private *pp; 2723 struct list_head *list; 2724 int i; 2725 unsigned long flags; 2726 2727 if (len > sizeof(pp->rb_buf[0].data)) 2728 len = sizeof(pp->rb_buf[0].data); 2729 spin_lock_irqsave(&all_pvt_lock, flags); 2730 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) { 2731 pp = list_entry(list, struct pmu_private, list); 2732 spin_lock(&pp->lock); 2733 i = pp->rb_put + 1; 2734 if (i >= RB_SIZE) 2735 i = 0; 2736 if (i != pp->rb_get) { 2737 struct rb_entry *rp = &pp->rb_buf[pp->rb_put]; 2738 rp->len = len; 2739 memcpy(rp->data, data, len); 2740 pp->rb_put = i; 2741 wake_up_interruptible(&pp->wait); 2742 } 2743 spin_unlock(&pp->lock); 2744 } 2745 spin_unlock_irqrestore(&all_pvt_lock, flags); 2746} 2747 2748static int 2749pmu_open(struct inode *inode, struct file *file) 2750{ 2751 struct pmu_private *pp; 2752 unsigned long flags; 2753 2754 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL); 2755 if (pp == 0) 2756 return -ENOMEM; 2757 pp->rb_get = pp->rb_put = 0; 2758 spin_lock_init(&pp->lock); 2759 init_waitqueue_head(&pp->wait); 2760 spin_lock_irqsave(&all_pvt_lock, flags); 2761#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2762 pp->backlight_locker = 0; 2763#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 2764 list_add(&pp->list, &all_pmu_pvt); 2765 spin_unlock_irqrestore(&all_pvt_lock, flags); 2766 file->private_data = pp; 2767 return 0; 2768} 2769 2770static ssize_t 2771pmu_read(struct file *file, char __user *buf, 2772 size_t count, loff_t *ppos) 2773{ 2774 struct pmu_private *pp = file->private_data; 2775 DECLARE_WAITQUEUE(wait, current); 2776 unsigned long flags; 2777 int ret = 0; 2778 2779 if (count < 1 || pp == 0) 2780 return -EINVAL; 2781 if (!access_ok(VERIFY_WRITE, buf, count)) 2782 return -EFAULT; 2783 2784 spin_lock_irqsave(&pp->lock, flags); 2785 add_wait_queue(&pp->wait, &wait); 2786 current->state = TASK_INTERRUPTIBLE; 2787 2788 for (;;) { 2789 ret = -EAGAIN; 2790 if (pp->rb_get != pp->rb_put) { 2791 int i = pp->rb_get; 2792 struct rb_entry *rp = &pp->rb_buf[i]; 2793 ret = rp->len; 2794 spin_unlock_irqrestore(&pp->lock, flags); 2795 if (ret > count) 2796 ret = count; 2797 if (ret > 0 && copy_to_user(buf, rp->data, ret)) 2798 ret = -EFAULT; 2799 if (++i >= RB_SIZE) 2800 i = 0; 2801 spin_lock_irqsave(&pp->lock, flags); 2802 pp->rb_get = i; 2803 } 2804 if (ret >= 0) 2805 break; 2806 if (file->f_flags & O_NONBLOCK) 2807 break; 2808 ret = -ERESTARTSYS; 2809 if (signal_pending(current)) 2810 break; 2811 spin_unlock_irqrestore(&pp->lock, flags); 2812 schedule(); 2813 spin_lock_irqsave(&pp->lock, flags); 2814 } 2815 current->state = TASK_RUNNING; 2816 remove_wait_queue(&pp->wait, &wait); 2817 spin_unlock_irqrestore(&pp->lock, flags); 2818 2819 return ret; 2820} 2821 2822static ssize_t 2823pmu_write(struct file *file, const char __user *buf, 2824 size_t count, loff_t *ppos) 2825{ 2826 return 0; 2827} 2828 2829static unsigned int 2830pmu_fpoll(struct file *filp, poll_table *wait) 2831{ 2832 struct pmu_private *pp = filp->private_data; 2833 unsigned int mask = 0; 2834 unsigned long flags; 2835 2836 if (pp == 0) 2837 return 0; 2838 poll_wait(filp, &pp->wait, wait); 2839 spin_lock_irqsave(&pp->lock, flags); 2840 if (pp->rb_get != pp->rb_put) 2841 mask |= POLLIN; 2842 spin_unlock_irqrestore(&pp->lock, flags); 2843 return mask; 2844} 2845 2846static int 2847pmu_release(struct inode *inode, struct file *file) 2848{ 2849 struct pmu_private *pp = file->private_data; 2850 unsigned long flags; 2851 2852 lock_kernel(); 2853 if (pp != 0) { 2854 file->private_data = NULL; 2855 spin_lock_irqsave(&all_pvt_lock, flags); 2856 list_del(&pp->list); 2857 spin_unlock_irqrestore(&all_pvt_lock, flags); 2858#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2859 if (pp->backlight_locker) { 2860 spin_lock_irqsave(&pmu_lock, flags); 2861 disable_kernel_backlight--; 2862 spin_unlock_irqrestore(&pmu_lock, flags); 2863 } 2864#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 2865 kfree(pp); 2866 } 2867 unlock_kernel(); 2868 return 0; 2869} 2870 2871static int 2872pmu_ioctl(struct inode * inode, struct file *filp, 2873 u_int cmd, u_long arg) 2874{ 2875 __u32 __user *argp = (__u32 __user *)arg; 2876 int error = -EINVAL; 2877 2878 switch (cmd) { 2879#if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2880 case PMU_IOC_SLEEP: 2881 if (!capable(CAP_SYS_ADMIN)) 2882 return -EACCES; 2883 if (sleep_in_progress) 2884 return -EBUSY; 2885 sleep_in_progress = 1; 2886 switch (pmu_kind) { 2887 case PMU_OHARE_BASED: 2888 error = powerbook_sleep_3400(); 2889 break; 2890 case PMU_HEATHROW_BASED: 2891 case PMU_PADDINGTON_BASED: 2892 error = powerbook_sleep_grackle(); 2893 break; 2894 case PMU_KEYLARGO_BASED: 2895 error = powerbook_sleep_Core99(); 2896 break; 2897 default: 2898 error = -ENOSYS; 2899 } 2900 sleep_in_progress = 0; 2901 break; 2902 case PMU_IOC_CAN_SLEEP: 2903 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) 2904 return put_user(0, argp); 2905 else 2906 return put_user(1, argp); 2907#endif /* CONFIG_PM && CONFIG_PPC32 */ 2908 2909#ifdef CONFIG_PMAC_BACKLIGHT 2910 /* Backlight should have its own device or go via 2911 * the fbdev 2912 */ 2913 case PMU_IOC_GET_BACKLIGHT: 2914 if (sleep_in_progress) 2915 return -EBUSY; 2916 error = get_backlight_level(); 2917 if (error < 0) 2918 return error; 2919 return put_user(error, argp); 2920 case PMU_IOC_SET_BACKLIGHT: 2921 { 2922 __u32 value; 2923 if (sleep_in_progress) 2924 return -EBUSY; 2925 error = get_user(value, argp); 2926 if (!error) 2927 error = set_backlight_level(value); 2928 break; 2929 } 2930#ifdef CONFIG_INPUT_ADBHID 2931 case PMU_IOC_GRAB_BACKLIGHT: { 2932 struct pmu_private *pp = filp->private_data; 2933 unsigned long flags; 2934 2935 if (pp->backlight_locker) 2936 return 0; 2937 pp->backlight_locker = 1; 2938 spin_lock_irqsave(&pmu_lock, flags); 2939 disable_kernel_backlight++; 2940 spin_unlock_irqrestore(&pmu_lock, flags); 2941 return 0; 2942 } 2943#endif /* CONFIG_INPUT_ADBHID */ 2944#endif /* CONFIG_PMAC_BACKLIGHT */ 2945 case PMU_IOC_GET_MODEL: 2946 return put_user(pmu_kind, argp); 2947 case PMU_IOC_HAS_ADB: 2948 return put_user(pmu_has_adb, argp); 2949 } 2950 return error; 2951} 2952 2953static struct file_operations pmu_device_fops = { 2954 .read = pmu_read, 2955 .write = pmu_write, 2956 .poll = pmu_fpoll, 2957 .ioctl = pmu_ioctl, 2958 .open = pmu_open, 2959 .release = pmu_release, 2960}; 2961 2962static struct miscdevice pmu_device = { 2963 PMU_MINOR, "pmu", &pmu_device_fops 2964}; 2965 2966static int pmu_device_init(void) 2967{ 2968 if (!via) 2969 return 0; 2970 if (misc_register(&pmu_device) < 0) 2971 printk(KERN_ERR "via-pmu: cannot register misc device.\n"); 2972 return 0; 2973} 2974device_initcall(pmu_device_init); 2975 2976 2977#ifdef DEBUG_SLEEP 2978static inline void 2979polled_handshake(volatile unsigned char __iomem *via) 2980{ 2981 via[B] &= ~TREQ; eieio(); 2982 while ((via[B] & TACK) != 0) 2983 ; 2984 via[B] |= TREQ; eieio(); 2985 while ((via[B] & TACK) == 0) 2986 ; 2987} 2988 2989static inline void 2990polled_send_byte(volatile unsigned char __iomem *via, int x) 2991{ 2992 via[ACR] |= SR_OUT | SR_EXT; eieio(); 2993 via[SR] = x; eieio(); 2994 polled_handshake(via); 2995} 2996 2997static inline int 2998polled_recv_byte(volatile unsigned char __iomem *via) 2999{ 3000 int x; 3001 3002 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio(); 3003 x = via[SR]; eieio(); 3004 polled_handshake(via); 3005 x = via[SR]; eieio(); 3006 return x; 3007} 3008 3009int 3010pmu_polled_request(struct adb_request *req) 3011{ 3012 unsigned long flags; 3013 int i, l, c; 3014 volatile unsigned char __iomem *v = via; 3015 3016 req->complete = 1; 3017 c = req->data[0]; 3018 l = pmu_data_len[c][0]; 3019 if (l >= 0 && req->nbytes != l + 1) 3020 return -EINVAL; 3021 3022 local_irq_save(flags); 3023 while (pmu_state != idle) 3024 pmu_poll(); 3025 3026 while ((via[B] & TACK) == 0) 3027 ; 3028 polled_send_byte(v, c); 3029 if (l < 0) { 3030 l = req->nbytes - 1; 3031 polled_send_byte(v, l); 3032 } 3033 for (i = 1; i <= l; ++i) 3034 polled_send_byte(v, req->data[i]); 3035 3036 l = pmu_data_len[c][1]; 3037 if (l < 0) 3038 l = polled_recv_byte(v); 3039 for (i = 0; i < l; ++i) 3040 req->reply[i + req->reply_len] = polled_recv_byte(v); 3041 3042 if (req->done) 3043 (*req->done)(req); 3044 3045 local_irq_restore(flags); 3046 return 0; 3047} 3048#endif /* DEBUG_SLEEP */ 3049 3050 3051/* FIXME: This is a temporary set of callbacks to enable us 3052 * to do suspend-to-disk. 3053 */ 3054 3055#if defined(CONFIG_PM) && defined(CONFIG_PPC32) 3056 3057static int pmu_sys_suspended = 0; 3058 3059static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state) 3060{ 3061 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended) 3062 return 0; 3063 3064 /* Suspend PMU event interrupts */ 3065 pmu_suspend(); 3066 3067 pmu_sys_suspended = 1; 3068 return 0; 3069} 3070 3071static int pmu_sys_resume(struct sys_device *sysdev) 3072{ 3073 struct adb_request req; 3074 3075 if (!pmu_sys_suspended) 3076 return 0; 3077 3078 /* Tell PMU we are ready */ 3079 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 3080 pmu_wait_complete(&req); 3081 3082 /* Resume PMU event interrupts */ 3083 pmu_resume(); 3084 3085 pmu_sys_suspended = 0; 3086 3087 return 0; 3088} 3089 3090#endif /* CONFIG_PM && CONFIG_PPC32 */ 3091 3092static struct sysdev_class pmu_sysclass = { 3093 set_kset_name("pmu"), 3094}; 3095 3096static struct sys_device device_pmu = { 3097 .id = 0, 3098 .cls = &pmu_sysclass, 3099}; 3100 3101static struct sysdev_driver driver_pmu = { 3102#if defined(CONFIG_PM) && defined(CONFIG_PPC32) 3103 .suspend = &pmu_sys_suspend, 3104 .resume = &pmu_sys_resume, 3105#endif /* CONFIG_PM && CONFIG_PPC32 */ 3106}; 3107 3108static int __init init_pmu_sysfs(void) 3109{ 3110 int rc; 3111 3112 rc = sysdev_class_register(&pmu_sysclass); 3113 if (rc) { 3114 printk(KERN_ERR "Failed registering PMU sys class\n"); 3115 return -ENODEV; 3116 } 3117 rc = sysdev_register(&device_pmu); 3118 if (rc) { 3119 printk(KERN_ERR "Failed registering PMU sys device\n"); 3120 return -ENODEV; 3121 } 3122 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu); 3123 if (rc) { 3124 printk(KERN_ERR "Failed registering PMU sys driver\n"); 3125 return -ENODEV; 3126 } 3127 return 0; 3128} 3129 3130subsys_initcall(init_pmu_sysfs); 3131 3132EXPORT_SYMBOL(pmu_request); 3133EXPORT_SYMBOL(pmu_poll); 3134EXPORT_SYMBOL(pmu_poll_adb); 3135EXPORT_SYMBOL(pmu_wait_complete); 3136EXPORT_SYMBOL(pmu_suspend); 3137EXPORT_SYMBOL(pmu_resume); 3138EXPORT_SYMBOL(pmu_unlock); 3139EXPORT_SYMBOL(pmu_i2c_combined_read); 3140EXPORT_SYMBOL(pmu_i2c_stdsub_write); 3141EXPORT_SYMBOL(pmu_i2c_simple_read); 3142EXPORT_SYMBOL(pmu_i2c_simple_write); 3143#if defined(CONFIG_PM) && defined(CONFIG_PPC32) 3144EXPORT_SYMBOL(pmu_enable_irled); 3145EXPORT_SYMBOL(pmu_battery_count); 3146EXPORT_SYMBOL(pmu_batteries); 3147EXPORT_SYMBOL(pmu_power_flags); 3148#endif /* CONFIG_PM && CONFIG_PPC32 */ 3149