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