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 * - Save/Restore PCI space properly 20 * 21 */ 22 #include <stdarg.h> 23 #include <linux/types.h> 24 #include <linux/errno.h> 25 #include <linux/kernel.h> 26 #include <linux/delay.h> 27 #include <linux/sched.h> 28 #include <linux/miscdevice.h> 29 #include <linux/blkdev.h> 30 #include <linux/pci.h> 31 #include <linux/slab.h> 32 #include <linux/poll.h> 33 #include <linux/adb.h> 34 #include <linux/pmu.h> 35 #include <linux/cuda.h> 36 #include <linux/smp_lock.h> 37 #include <linux/module.h> 38 #include <linux/spinlock.h> 39 #include <linux/pm.h> 40 #include <linux/proc_fs.h> 41 #include <linux/init.h> 42 #include <linux/interrupt.h> 43 #include <linux/device.h> 44 #include <linux/sysdev.h> 45 #include <linux/freezer.h> 46 #include <linux/syscalls.h> 47 #include <linux/suspend.h> 48 #include <linux/cpu.h> 49 #include <asm/prom.h> 50 #include <asm/machdep.h> 51 #include <asm/io.h> 52 #include <asm/pgtable.h> 53 #include <asm/system.h> 54 #include <asm/sections.h> 55 #include <asm/irq.h> 56 #include <asm/pmac_feature.h> 57 #include <asm/pmac_pfunc.h> 58 #include <asm/pmac_low_i2c.h> 59 #include <asm/uaccess.h> 60 #include <asm/mmu_context.h> 61 #include <asm/cputable.h> 62 #include <asm/time.h> 63 #include <asm/backlight.h> 64 65 #include "via-pmu-event.h" 66 67 /* Some compile options */ 68 #undef SUSPEND_USES_PMU 69 #define DEBUG_SLEEP 70 #undef HACKED_PCI_SAVE 71 72 /* Misc minor number allocated for /dev/pmu */ 73 #define PMU_MINOR 154 74 75 /* How many iterations between battery polls */ 76 #define BATTERY_POLLING_COUNT 2 77 78 static 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 */ 114 115 static volatile enum pmu_state { 116 idle, 117 sending, 118 intack, 119 reading, 120 reading_intr, 121 locked, 122 } pmu_state; 123 124 static 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 }; 130 131 static struct adb_request *current_req; 132 static struct adb_request *last_req; 133 static struct adb_request *req_awaiting_reply; 134 static unsigned char interrupt_data[2][32]; 135 static int interrupt_data_len[2]; 136 static int int_data_last; 137 static unsigned char *reply_ptr; 138 static int data_index; 139 static int data_len; 140 static volatile int adb_int_pending; 141 static volatile int disable_poll; 142 static struct device_node *vias; 143 static int pmu_kind = PMU_UNKNOWN; 144 static int pmu_fully_inited; 145 static int pmu_has_adb; 146 static struct device_node *gpio_node; 147 static unsigned char __iomem *gpio_reg; 148 static int gpio_irq = NO_IRQ; 149 static int gpio_irq_enabled = -1; 150 static volatile int pmu_suspended; 151 static spinlock_t pmu_lock; 152 static u8 pmu_intr_mask; 153 static int pmu_version; 154 static int drop_interrupts; 155 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32) 156 static int option_lid_wakeup = 1; 157 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */ 158 #if (defined(CONFIG_PM_SLEEP)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT_LEGACY) 159 static int sleep_in_progress; 160 #endif 161 static unsigned long async_req_locks; 162 static unsigned int pmu_irq_stats[11]; 163 164 static struct proc_dir_entry *proc_pmu_root; 165 static struct proc_dir_entry *proc_pmu_info; 166 static struct proc_dir_entry *proc_pmu_irqstats; 167 static struct proc_dir_entry *proc_pmu_options; 168 static int option_server_mode; 169 170 int pmu_battery_count; 171 int pmu_cur_battery; 172 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT; 173 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES]; 174 static int query_batt_timer = BATTERY_POLLING_COUNT; 175 static struct adb_request batt_req; 176 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES]; 177 178 int __fake_sleep; 179 int asleep; 180 BLOCKING_NOTIFIER_HEAD(sleep_notifier_list); 181 182 #ifdef CONFIG_ADB 183 static int adb_dev_map; 184 static int pmu_adb_flags; 185 186 static int pmu_probe(void); 187 static int pmu_init(void); 188 static int pmu_send_request(struct adb_request *req, int sync); 189 static int pmu_adb_autopoll(int devs); 190 static int pmu_adb_reset_bus(void); 191 #endif /* CONFIG_ADB */ 192 193 static int init_pmu(void); 194 static void pmu_start(void); 195 static irqreturn_t via_pmu_interrupt(int irq, void *arg); 196 static irqreturn_t gpio1_interrupt(int irq, void *arg); 197 static int proc_get_info(char *page, char **start, off_t off, 198 int count, int *eof, void *data); 199 static int proc_get_irqstats(char *page, char **start, off_t off, 200 int count, int *eof, void *data); 201 static void pmu_pass_intr(unsigned char *data, int len); 202 static int proc_get_batt(char *page, char **start, off_t off, 203 int count, int *eof, void *data); 204 static int proc_read_options(char *page, char **start, off_t off, 205 int count, int *eof, void *data); 206 static int proc_write_options(struct file *file, const char __user *buffer, 207 unsigned long count, void *data); 208 209 #ifdef CONFIG_ADB 210 struct adb_driver via_pmu_driver = { 211 "PMU", 212 pmu_probe, 213 pmu_init, 214 pmu_send_request, 215 pmu_adb_autopoll, 216 pmu_poll_adb, 217 pmu_adb_reset_bus 218 }; 219 #endif /* CONFIG_ADB */ 220 221 extern void low_sleep_handler(void); 222 extern void enable_kernel_altivec(void); 223 extern void enable_kernel_fp(void); 224 225 #ifdef DEBUG_SLEEP 226 int pmu_polled_request(struct adb_request *req); 227 int pmu_wink(struct adb_request *req); 228 #endif 229 230 /* 231 * This table indicates for each PMU opcode: 232 * - the number of data bytes to be sent with the command, or -1 233 * if a length byte should be sent, 234 * - the number of response bytes which the PMU will return, or 235 * -1 if it will send a length byte. 236 */ 237 static const s8 pmu_data_len[256][2] = { 238 /* 0 1 2 3 4 5 6 7 */ 239 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 240 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 241 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 242 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0}, 243 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0}, 244 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1}, 245 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 246 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0}, 247 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 248 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1}, 249 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0}, 250 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1}, 251 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 252 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1}, 253 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 254 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1}, 255 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 256 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 257 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 258 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 259 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0}, 260 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 261 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 262 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 263 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 264 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 265 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 266 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1}, 267 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0}, 268 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0}, 269 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 270 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 271 }; 272 273 static char *pbook_type[] = { 274 "Unknown PowerBook", 275 "PowerBook 2400/3400/3500(G3)", 276 "PowerBook G3 Series", 277 "1999 PowerBook G3", 278 "Core99" 279 }; 280 281 int __init find_via_pmu(void) 282 { 283 u64 taddr; 284 const u32 *reg; 285 286 if (via != 0) 287 return 1; 288 vias = of_find_node_by_name(NULL, "via-pmu"); 289 if (vias == NULL) 290 return 0; 291 292 reg = of_get_property(vias, "reg", NULL); 293 if (reg == NULL) { 294 printk(KERN_ERR "via-pmu: No \"reg\" property !\n"); 295 goto fail; 296 } 297 taddr = of_translate_address(vias, reg); 298 if (taddr == OF_BAD_ADDR) { 299 printk(KERN_ERR "via-pmu: Can't translate address !\n"); 300 goto fail; 301 } 302 303 spin_lock_init(&pmu_lock); 304 305 pmu_has_adb = 1; 306 307 pmu_intr_mask = PMU_INT_PCEJECT | 308 PMU_INT_SNDBRT | 309 PMU_INT_ADB | 310 PMU_INT_TICK; 311 312 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0) 313 || of_device_is_compatible(vias->parent, "ohare"))) 314 pmu_kind = PMU_OHARE_BASED; 315 else if (of_device_is_compatible(vias->parent, "paddington")) 316 pmu_kind = PMU_PADDINGTON_BASED; 317 else if (of_device_is_compatible(vias->parent, "heathrow")) 318 pmu_kind = PMU_HEATHROW_BASED; 319 else if (of_device_is_compatible(vias->parent, "Keylargo") 320 || of_device_is_compatible(vias->parent, "K2-Keylargo")) { 321 struct device_node *gpiop; 322 struct device_node *adbp; 323 u64 gaddr = OF_BAD_ADDR; 324 325 pmu_kind = PMU_KEYLARGO_BASED; 326 adbp = of_find_node_by_type(NULL, "adb"); 327 pmu_has_adb = (adbp != NULL); 328 of_node_put(adbp); 329 pmu_intr_mask = PMU_INT_PCEJECT | 330 PMU_INT_SNDBRT | 331 PMU_INT_ADB | 332 PMU_INT_TICK | 333 PMU_INT_ENVIRONMENT; 334 335 gpiop = of_find_node_by_name(NULL, "gpio"); 336 if (gpiop) { 337 reg = of_get_property(gpiop, "reg", NULL); 338 if (reg) 339 gaddr = of_translate_address(gpiop, reg); 340 if (gaddr != OF_BAD_ADDR) 341 gpio_reg = ioremap(gaddr, 0x10); 342 } 343 if (gpio_reg == NULL) { 344 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n"); 345 goto fail_gpio; 346 } 347 } else 348 pmu_kind = PMU_UNKNOWN; 349 350 via = ioremap(taddr, 0x2000); 351 if (via == NULL) { 352 printk(KERN_ERR "via-pmu: Can't map address !\n"); 353 goto fail; 354 } 355 356 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 357 out_8(&via[IFR], 0x7f); /* clear IFR */ 358 359 pmu_state = idle; 360 361 if (!init_pmu()) { 362 via = NULL; 363 return 0; 364 } 365 366 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n", 367 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version); 368 369 sys_ctrler = SYS_CTRLER_PMU; 370 371 return 1; 372 fail: 373 of_node_put(vias); 374 iounmap(gpio_reg); 375 gpio_reg = NULL; 376 fail_gpio: 377 vias = NULL; 378 return 0; 379 } 380 381 #ifdef CONFIG_ADB 382 static int pmu_probe(void) 383 { 384 return vias == NULL? -ENODEV: 0; 385 } 386 387 static int __init pmu_init(void) 388 { 389 if (vias == NULL) 390 return -ENODEV; 391 return 0; 392 } 393 #endif /* CONFIG_ADB */ 394 395 /* 396 * We can't wait until pmu_init gets called, that happens too late. 397 * It happens after IDE and SCSI initialization, which can take a few 398 * seconds, and by that time the PMU could have given up on us and 399 * turned us off. 400 * Thus this is called with arch_initcall rather than device_initcall. 401 */ 402 static int __init via_pmu_start(void) 403 { 404 unsigned int irq; 405 406 if (vias == NULL) 407 return -ENODEV; 408 409 batt_req.complete = 1; 410 411 irq = irq_of_parse_and_map(vias, 0); 412 if (irq == NO_IRQ) { 413 printk(KERN_ERR "via-pmu: can't map interrupt\n"); 414 return -ENODEV; 415 } 416 if (request_irq(irq, via_pmu_interrupt, 0, "VIA-PMU", (void *)0)) { 417 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq); 418 return -ENODEV; 419 } 420 421 if (pmu_kind == PMU_KEYLARGO_BASED) { 422 gpio_node = of_find_node_by_name(NULL, "extint-gpio1"); 423 if (gpio_node == NULL) 424 gpio_node = of_find_node_by_name(NULL, 425 "pmu-interrupt"); 426 if (gpio_node) 427 gpio_irq = irq_of_parse_and_map(gpio_node, 0); 428 429 if (gpio_irq != NO_IRQ) { 430 if (request_irq(gpio_irq, gpio1_interrupt, 0, 431 "GPIO1 ADB", (void *)0)) 432 printk(KERN_ERR "pmu: can't get irq %d" 433 " (GPIO1)\n", gpio_irq); 434 else 435 gpio_irq_enabled = 1; 436 } 437 } 438 439 /* Enable interrupts */ 440 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 441 442 pmu_fully_inited = 1; 443 444 /* Make sure PMU settle down before continuing. This is _very_ important 445 * since the IDE probe may shut interrupts down for quite a bit of time. If 446 * a PMU communication is pending while this happens, the PMU may timeout 447 * Not that on Core99 machines, the PMU keeps sending us environement 448 * messages, we should find a way to either fix IDE or make it call 449 * pmu_suspend() before masking interrupts. This can also happens while 450 * scolling with some fbdevs. 451 */ 452 do { 453 pmu_poll(); 454 } while (pmu_state != idle); 455 456 return 0; 457 } 458 459 arch_initcall(via_pmu_start); 460 461 /* 462 * This has to be done after pci_init, which is a subsys_initcall. 463 */ 464 static int __init via_pmu_dev_init(void) 465 { 466 if (vias == NULL) 467 return -ENODEV; 468 469 #ifdef CONFIG_PMAC_BACKLIGHT 470 /* Initialize backlight */ 471 pmu_backlight_init(); 472 #endif 473 474 #ifdef CONFIG_PPC32 475 if (machine_is_compatible("AAPL,3400/2400") || 476 machine_is_compatible("AAPL,3500")) { 477 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 478 NULL, PMAC_MB_INFO_MODEL, 0); 479 pmu_battery_count = 1; 480 if (mb == PMAC_TYPE_COMET) 481 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET; 482 else 483 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER; 484 } else if (machine_is_compatible("AAPL,PowerBook1998") || 485 machine_is_compatible("PowerBook1,1")) { 486 pmu_battery_count = 2; 487 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 488 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 489 } else { 490 struct device_node* prim = 491 of_find_node_by_name(NULL, "power-mgt"); 492 const u32 *prim_info = NULL; 493 if (prim) 494 prim_info = of_get_property(prim, "prim-info", NULL); 495 if (prim_info) { 496 /* Other stuffs here yet unknown */ 497 pmu_battery_count = (prim_info[6] >> 16) & 0xff; 498 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 499 if (pmu_battery_count > 1) 500 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 501 } 502 of_node_put(prim); 503 } 504 #endif /* CONFIG_PPC32 */ 505 506 /* Create /proc/pmu */ 507 proc_pmu_root = proc_mkdir("pmu", NULL); 508 if (proc_pmu_root) { 509 long i; 510 511 for (i=0; i<pmu_battery_count; i++) { 512 char title[16]; 513 sprintf(title, "battery_%ld", i); 514 proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root, 515 proc_get_batt, (void *)i); 516 } 517 518 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root, 519 proc_get_info, NULL); 520 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root, 521 proc_get_irqstats, NULL); 522 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root); 523 if (proc_pmu_options) { 524 proc_pmu_options->read_proc = proc_read_options; 525 proc_pmu_options->write_proc = proc_write_options; 526 } 527 } 528 return 0; 529 } 530 531 device_initcall(via_pmu_dev_init); 532 533 static int 534 init_pmu(void) 535 { 536 int timeout; 537 struct adb_request req; 538 539 out_8(&via[B], via[B] | TREQ); /* negate TREQ */ 540 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */ 541 542 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 543 timeout = 100000; 544 while (!req.complete) { 545 if (--timeout < 0) { 546 printk(KERN_ERR "init_pmu: no response from PMU\n"); 547 return 0; 548 } 549 udelay(10); 550 pmu_poll(); 551 } 552 553 /* ack all pending interrupts */ 554 timeout = 100000; 555 interrupt_data[0][0] = 1; 556 while (interrupt_data[0][0] || pmu_state != idle) { 557 if (--timeout < 0) { 558 printk(KERN_ERR "init_pmu: timed out acking intrs\n"); 559 return 0; 560 } 561 if (pmu_state == idle) 562 adb_int_pending = 1; 563 via_pmu_interrupt(0, NULL); 564 udelay(10); 565 } 566 567 /* Tell PMU we are ready. */ 568 if (pmu_kind == PMU_KEYLARGO_BASED) { 569 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 570 while (!req.complete) 571 pmu_poll(); 572 } 573 574 /* Read PMU version */ 575 pmu_request(&req, NULL, 1, PMU_GET_VERSION); 576 pmu_wait_complete(&req); 577 if (req.reply_len > 0) 578 pmu_version = req.reply[0]; 579 580 /* Read server mode setting */ 581 if (pmu_kind == PMU_KEYLARGO_BASED) { 582 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, 583 PMU_PWR_GET_POWERUP_EVENTS); 584 pmu_wait_complete(&req); 585 if (req.reply_len == 2) { 586 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT) 587 option_server_mode = 1; 588 printk(KERN_INFO "via-pmu: Server Mode is %s\n", 589 option_server_mode ? "enabled" : "disabled"); 590 } 591 } 592 return 1; 593 } 594 595 int 596 pmu_get_model(void) 597 { 598 return pmu_kind; 599 } 600 601 static void pmu_set_server_mode(int server_mode) 602 { 603 struct adb_request req; 604 605 if (pmu_kind != PMU_KEYLARGO_BASED) 606 return; 607 608 option_server_mode = server_mode; 609 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS); 610 pmu_wait_complete(&req); 611 if (req.reply_len < 2) 612 return; 613 if (server_mode) 614 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 615 PMU_PWR_SET_POWERUP_EVENTS, 616 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 617 else 618 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 619 PMU_PWR_CLR_POWERUP_EVENTS, 620 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 621 pmu_wait_complete(&req); 622 } 623 624 /* This new version of the code for 2400/3400/3500 powerbooks 625 * is inspired from the implementation in gkrellm-pmu 626 */ 627 static void 628 done_battery_state_ohare(struct adb_request* req) 629 { 630 /* format: 631 * [0] : flags 632 * 0x01 : AC indicator 633 * 0x02 : charging 634 * 0x04 : battery exist 635 * 0x08 : 636 * 0x10 : 637 * 0x20 : full charged 638 * 0x40 : pcharge reset 639 * 0x80 : battery exist 640 * 641 * [1][2] : battery voltage 642 * [3] : CPU temperature 643 * [4] : battery temperature 644 * [5] : current 645 * [6][7] : pcharge 646 * --tkoba 647 */ 648 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER; 649 long pcharge, charge, vb, vmax, lmax; 650 long vmax_charging, vmax_charged; 651 long amperage, voltage, time, max; 652 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 653 NULL, PMAC_MB_INFO_MODEL, 0); 654 655 if (req->reply[0] & 0x01) 656 pmu_power_flags |= PMU_PWR_AC_PRESENT; 657 else 658 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 659 660 if (mb == PMAC_TYPE_COMET) { 661 vmax_charged = 189; 662 vmax_charging = 213; 663 lmax = 6500; 664 } else { 665 vmax_charged = 330; 666 vmax_charging = 330; 667 lmax = 6500; 668 } 669 vmax = vmax_charged; 670 671 /* If battery installed */ 672 if (req->reply[0] & 0x04) { 673 bat_flags |= PMU_BATT_PRESENT; 674 if (req->reply[0] & 0x02) 675 bat_flags |= PMU_BATT_CHARGING; 676 vb = (req->reply[1] << 8) | req->reply[2]; 677 voltage = (vb * 265 + 72665) / 10; 678 amperage = req->reply[5]; 679 if ((req->reply[0] & 0x01) == 0) { 680 if (amperage > 200) 681 vb += ((amperage - 200) * 15)/100; 682 } else if (req->reply[0] & 0x02) { 683 vb = (vb * 97) / 100; 684 vmax = vmax_charging; 685 } 686 charge = (100 * vb) / vmax; 687 if (req->reply[0] & 0x40) { 688 pcharge = (req->reply[6] << 8) + req->reply[7]; 689 if (pcharge > lmax) 690 pcharge = lmax; 691 pcharge *= 100; 692 pcharge = 100 - pcharge / lmax; 693 if (pcharge < charge) 694 charge = pcharge; 695 } 696 if (amperage > 0) 697 time = (charge * 16440) / amperage; 698 else 699 time = 0; 700 max = 100; 701 amperage = -amperage; 702 } else 703 charge = max = amperage = voltage = time = 0; 704 705 pmu_batteries[pmu_cur_battery].flags = bat_flags; 706 pmu_batteries[pmu_cur_battery].charge = charge; 707 pmu_batteries[pmu_cur_battery].max_charge = max; 708 pmu_batteries[pmu_cur_battery].amperage = amperage; 709 pmu_batteries[pmu_cur_battery].voltage = voltage; 710 pmu_batteries[pmu_cur_battery].time_remaining = time; 711 712 clear_bit(0, &async_req_locks); 713 } 714 715 static void 716 done_battery_state_smart(struct adb_request* req) 717 { 718 /* format: 719 * [0] : format of this structure (known: 3,4,5) 720 * [1] : flags 721 * 722 * format 3 & 4: 723 * 724 * [2] : charge 725 * [3] : max charge 726 * [4] : current 727 * [5] : voltage 728 * 729 * format 5: 730 * 731 * [2][3] : charge 732 * [4][5] : max charge 733 * [6][7] : current 734 * [8][9] : voltage 735 */ 736 737 unsigned int bat_flags = PMU_BATT_TYPE_SMART; 738 int amperage; 739 unsigned int capa, max, voltage; 740 741 if (req->reply[1] & 0x01) 742 pmu_power_flags |= PMU_PWR_AC_PRESENT; 743 else 744 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 745 746 747 capa = max = amperage = voltage = 0; 748 749 if (req->reply[1] & 0x04) { 750 bat_flags |= PMU_BATT_PRESENT; 751 switch(req->reply[0]) { 752 case 3: 753 case 4: capa = req->reply[2]; 754 max = req->reply[3]; 755 amperage = *((signed char *)&req->reply[4]); 756 voltage = req->reply[5]; 757 break; 758 case 5: capa = (req->reply[2] << 8) | req->reply[3]; 759 max = (req->reply[4] << 8) | req->reply[5]; 760 amperage = *((signed short *)&req->reply[6]); 761 voltage = (req->reply[8] << 8) | req->reply[9]; 762 break; 763 default: 764 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n", 765 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]); 766 break; 767 } 768 } 769 770 if ((req->reply[1] & 0x01) && (amperage > 0)) 771 bat_flags |= PMU_BATT_CHARGING; 772 773 pmu_batteries[pmu_cur_battery].flags = bat_flags; 774 pmu_batteries[pmu_cur_battery].charge = capa; 775 pmu_batteries[pmu_cur_battery].max_charge = max; 776 pmu_batteries[pmu_cur_battery].amperage = amperage; 777 pmu_batteries[pmu_cur_battery].voltage = voltage; 778 if (amperage) { 779 if ((req->reply[1] & 0x01) && (amperage > 0)) 780 pmu_batteries[pmu_cur_battery].time_remaining 781 = ((max-capa) * 3600) / amperage; 782 else 783 pmu_batteries[pmu_cur_battery].time_remaining 784 = (capa * 3600) / (-amperage); 785 } else 786 pmu_batteries[pmu_cur_battery].time_remaining = 0; 787 788 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count; 789 790 clear_bit(0, &async_req_locks); 791 } 792 793 static void 794 query_battery_state(void) 795 { 796 if (test_and_set_bit(0, &async_req_locks)) 797 return; 798 if (pmu_kind == PMU_OHARE_BASED) 799 pmu_request(&batt_req, done_battery_state_ohare, 800 1, PMU_BATTERY_STATE); 801 else 802 pmu_request(&batt_req, done_battery_state_smart, 803 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1); 804 } 805 806 static int 807 proc_get_info(char *page, char **start, off_t off, 808 int count, int *eof, void *data) 809 { 810 char* p = page; 811 812 p += sprintf(p, "PMU driver version : %d\n", PMU_DRIVER_VERSION); 813 p += sprintf(p, "PMU firmware version : %02x\n", pmu_version); 814 p += sprintf(p, "AC Power : %d\n", 815 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0); 816 p += sprintf(p, "Battery count : %d\n", pmu_battery_count); 817 818 return p - page; 819 } 820 821 static int 822 proc_get_irqstats(char *page, char **start, off_t off, 823 int count, int *eof, void *data) 824 { 825 int i; 826 char* p = page; 827 static const char *irq_names[] = { 828 "Total CB1 triggered events", 829 "Total GPIO1 triggered events", 830 "PC-Card eject button", 831 "Sound/Brightness button", 832 "ADB message", 833 "Battery state change", 834 "Environment interrupt", 835 "Tick timer", 836 "Ghost interrupt (zero len)", 837 "Empty interrupt (empty mask)", 838 "Max irqs in a row" 839 }; 840 841 for (i=0; i<11; i++) { 842 p += sprintf(p, " %2u: %10u (%s)\n", 843 i, pmu_irq_stats[i], irq_names[i]); 844 } 845 return p - page; 846 } 847 848 static int 849 proc_get_batt(char *page, char **start, off_t off, 850 int count, int *eof, void *data) 851 { 852 long batnum = (long)data; 853 char *p = page; 854 855 p += sprintf(p, "\n"); 856 p += sprintf(p, "flags : %08x\n", 857 pmu_batteries[batnum].flags); 858 p += sprintf(p, "charge : %d\n", 859 pmu_batteries[batnum].charge); 860 p += sprintf(p, "max_charge : %d\n", 861 pmu_batteries[batnum].max_charge); 862 p += sprintf(p, "current : %d\n", 863 pmu_batteries[batnum].amperage); 864 p += sprintf(p, "voltage : %d\n", 865 pmu_batteries[batnum].voltage); 866 p += sprintf(p, "time rem. : %d\n", 867 pmu_batteries[batnum].time_remaining); 868 869 return p - page; 870 } 871 872 static int 873 proc_read_options(char *page, char **start, off_t off, 874 int count, int *eof, void *data) 875 { 876 char *p = page; 877 878 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32) 879 if (pmu_kind == PMU_KEYLARGO_BASED && 880 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 881 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup); 882 #endif 883 if (pmu_kind == PMU_KEYLARGO_BASED) 884 p += sprintf(p, "server_mode=%d\n", option_server_mode); 885 886 return p - page; 887 } 888 889 static int 890 proc_write_options(struct file *file, const char __user *buffer, 891 unsigned long count, void *data) 892 { 893 char tmp[33]; 894 char *label, *val; 895 unsigned long fcount = count; 896 897 if (!count) 898 return -EINVAL; 899 if (count > 32) 900 count = 32; 901 if (copy_from_user(tmp, buffer, count)) 902 return -EFAULT; 903 tmp[count] = 0; 904 905 label = tmp; 906 while(*label == ' ') 907 label++; 908 val = label; 909 while(*val && (*val != '=')) { 910 if (*val == ' ') 911 *val = 0; 912 val++; 913 } 914 if ((*val) == 0) 915 return -EINVAL; 916 *(val++) = 0; 917 while(*val == ' ') 918 val++; 919 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32) 920 if (pmu_kind == PMU_KEYLARGO_BASED && 921 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 922 if (!strcmp(label, "lid_wakeup")) 923 option_lid_wakeup = ((*val) == '1'); 924 #endif 925 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) { 926 int new_value; 927 new_value = ((*val) == '1'); 928 if (new_value != option_server_mode) 929 pmu_set_server_mode(new_value); 930 } 931 return fcount; 932 } 933 934 #ifdef CONFIG_ADB 935 /* Send an ADB command */ 936 static int 937 pmu_send_request(struct adb_request *req, int sync) 938 { 939 int i, ret; 940 941 if ((vias == NULL) || (!pmu_fully_inited)) { 942 req->complete = 1; 943 return -ENXIO; 944 } 945 946 ret = -EINVAL; 947 948 switch (req->data[0]) { 949 case PMU_PACKET: 950 for (i = 0; i < req->nbytes - 1; ++i) 951 req->data[i] = req->data[i+1]; 952 --req->nbytes; 953 if (pmu_data_len[req->data[0]][1] != 0) { 954 req->reply[0] = ADB_RET_OK; 955 req->reply_len = 1; 956 } else 957 req->reply_len = 0; 958 ret = pmu_queue_request(req); 959 break; 960 case CUDA_PACKET: 961 switch (req->data[1]) { 962 case CUDA_GET_TIME: 963 if (req->nbytes != 2) 964 break; 965 req->data[0] = PMU_READ_RTC; 966 req->nbytes = 1; 967 req->reply_len = 3; 968 req->reply[0] = CUDA_PACKET; 969 req->reply[1] = 0; 970 req->reply[2] = CUDA_GET_TIME; 971 ret = pmu_queue_request(req); 972 break; 973 case CUDA_SET_TIME: 974 if (req->nbytes != 6) 975 break; 976 req->data[0] = PMU_SET_RTC; 977 req->nbytes = 5; 978 for (i = 1; i <= 4; ++i) 979 req->data[i] = req->data[i+1]; 980 req->reply_len = 3; 981 req->reply[0] = CUDA_PACKET; 982 req->reply[1] = 0; 983 req->reply[2] = CUDA_SET_TIME; 984 ret = pmu_queue_request(req); 985 break; 986 } 987 break; 988 case ADB_PACKET: 989 if (!pmu_has_adb) 990 return -ENXIO; 991 for (i = req->nbytes - 1; i > 1; --i) 992 req->data[i+2] = req->data[i]; 993 req->data[3] = req->nbytes - 2; 994 req->data[2] = pmu_adb_flags; 995 /*req->data[1] = req->data[1];*/ 996 req->data[0] = PMU_ADB_CMD; 997 req->nbytes += 2; 998 req->reply_expected = 1; 999 req->reply_len = 0; 1000 ret = pmu_queue_request(req); 1001 break; 1002 } 1003 if (ret) { 1004 req->complete = 1; 1005 return ret; 1006 } 1007 1008 if (sync) 1009 while (!req->complete) 1010 pmu_poll(); 1011 1012 return 0; 1013 } 1014 1015 /* Enable/disable autopolling */ 1016 static int 1017 pmu_adb_autopoll(int devs) 1018 { 1019 struct adb_request req; 1020 1021 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1022 return -ENXIO; 1023 1024 if (devs) { 1025 adb_dev_map = devs; 1026 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86, 1027 adb_dev_map >> 8, adb_dev_map); 1028 pmu_adb_flags = 2; 1029 } else { 1030 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF); 1031 pmu_adb_flags = 0; 1032 } 1033 while (!req.complete) 1034 pmu_poll(); 1035 return 0; 1036 } 1037 1038 /* Reset the ADB bus */ 1039 static int 1040 pmu_adb_reset_bus(void) 1041 { 1042 struct adb_request req; 1043 int save_autopoll = adb_dev_map; 1044 1045 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1046 return -ENXIO; 1047 1048 /* anyone got a better idea?? */ 1049 pmu_adb_autopoll(0); 1050 1051 req.nbytes = 5; 1052 req.done = NULL; 1053 req.data[0] = PMU_ADB_CMD; 1054 req.data[1] = 0; 1055 req.data[2] = ADB_BUSRESET; 1056 req.data[3] = 0; 1057 req.data[4] = 0; 1058 req.reply_len = 0; 1059 req.reply_expected = 1; 1060 if (pmu_queue_request(&req) != 0) { 1061 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n"); 1062 return -EIO; 1063 } 1064 pmu_wait_complete(&req); 1065 1066 if (save_autopoll != 0) 1067 pmu_adb_autopoll(save_autopoll); 1068 1069 return 0; 1070 } 1071 #endif /* CONFIG_ADB */ 1072 1073 /* Construct and send a pmu request */ 1074 int 1075 pmu_request(struct adb_request *req, void (*done)(struct adb_request *), 1076 int nbytes, ...) 1077 { 1078 va_list list; 1079 int i; 1080 1081 if (vias == NULL) 1082 return -ENXIO; 1083 1084 if (nbytes < 0 || nbytes > 32) { 1085 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes); 1086 req->complete = 1; 1087 return -EINVAL; 1088 } 1089 req->nbytes = nbytes; 1090 req->done = done; 1091 va_start(list, nbytes); 1092 for (i = 0; i < nbytes; ++i) 1093 req->data[i] = va_arg(list, int); 1094 va_end(list); 1095 req->reply_len = 0; 1096 req->reply_expected = 0; 1097 return pmu_queue_request(req); 1098 } 1099 1100 int 1101 pmu_queue_request(struct adb_request *req) 1102 { 1103 unsigned long flags; 1104 int nsend; 1105 1106 if (via == NULL) { 1107 req->complete = 1; 1108 return -ENXIO; 1109 } 1110 if (req->nbytes <= 0) { 1111 req->complete = 1; 1112 return 0; 1113 } 1114 nsend = pmu_data_len[req->data[0]][0]; 1115 if (nsend >= 0 && req->nbytes != nsend + 1) { 1116 req->complete = 1; 1117 return -EINVAL; 1118 } 1119 1120 req->next = NULL; 1121 req->sent = 0; 1122 req->complete = 0; 1123 1124 spin_lock_irqsave(&pmu_lock, flags); 1125 if (current_req != 0) { 1126 last_req->next = req; 1127 last_req = req; 1128 } else { 1129 current_req = req; 1130 last_req = req; 1131 if (pmu_state == idle) 1132 pmu_start(); 1133 } 1134 spin_unlock_irqrestore(&pmu_lock, flags); 1135 1136 return 0; 1137 } 1138 1139 static inline void 1140 wait_for_ack(void) 1141 { 1142 /* Sightly increased the delay, I had one occurrence of the message 1143 * reported 1144 */ 1145 int timeout = 4000; 1146 while ((in_8(&via[B]) & TACK) == 0) { 1147 if (--timeout < 0) { 1148 printk(KERN_ERR "PMU not responding (!ack)\n"); 1149 return; 1150 } 1151 udelay(10); 1152 } 1153 } 1154 1155 /* New PMU seems to be very sensitive to those timings, so we make sure 1156 * PCI is flushed immediately */ 1157 static inline void 1158 send_byte(int x) 1159 { 1160 volatile unsigned char __iomem *v = via; 1161 1162 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT); 1163 out_8(&v[SR], x); 1164 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */ 1165 (void)in_8(&v[B]); 1166 } 1167 1168 static inline void 1169 recv_byte(void) 1170 { 1171 volatile unsigned char __iomem *v = via; 1172 1173 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT); 1174 in_8(&v[SR]); /* resets SR */ 1175 out_8(&v[B], in_8(&v[B]) & ~TREQ); 1176 (void)in_8(&v[B]); 1177 } 1178 1179 static inline void 1180 pmu_done(struct adb_request *req) 1181 { 1182 void (*done)(struct adb_request *) = req->done; 1183 mb(); 1184 req->complete = 1; 1185 /* Here, we assume that if the request has a done member, the 1186 * struct request will survive to setting req->complete to 1 1187 */ 1188 if (done) 1189 (*done)(req); 1190 } 1191 1192 static void 1193 pmu_start(void) 1194 { 1195 struct adb_request *req; 1196 1197 /* assert pmu_state == idle */ 1198 /* get the packet to send */ 1199 req = current_req; 1200 if (req == 0 || pmu_state != idle 1201 || (/*req->reply_expected && */req_awaiting_reply)) 1202 return; 1203 1204 pmu_state = sending; 1205 data_index = 1; 1206 data_len = pmu_data_len[req->data[0]][0]; 1207 1208 /* Sounds safer to make sure ACK is high before writing. This helped 1209 * kill a problem with ADB and some iBooks 1210 */ 1211 wait_for_ack(); 1212 /* set the shift register to shift out and send a byte */ 1213 send_byte(req->data[0]); 1214 } 1215 1216 void 1217 pmu_poll(void) 1218 { 1219 if (!via) 1220 return; 1221 if (disable_poll) 1222 return; 1223 via_pmu_interrupt(0, NULL); 1224 } 1225 1226 void 1227 pmu_poll_adb(void) 1228 { 1229 if (!via) 1230 return; 1231 if (disable_poll) 1232 return; 1233 /* Kicks ADB read when PMU is suspended */ 1234 adb_int_pending = 1; 1235 do { 1236 via_pmu_interrupt(0, NULL); 1237 } while (pmu_suspended && (adb_int_pending || pmu_state != idle 1238 || req_awaiting_reply)); 1239 } 1240 1241 void 1242 pmu_wait_complete(struct adb_request *req) 1243 { 1244 if (!via) 1245 return; 1246 while((pmu_state != idle && pmu_state != locked) || !req->complete) 1247 via_pmu_interrupt(0, NULL); 1248 } 1249 1250 /* This function loops until the PMU is idle and prevents it from 1251 * anwsering to ADB interrupts. pmu_request can still be called. 1252 * This is done to avoid spurrious shutdowns when we know we'll have 1253 * interrupts switched off for a long time 1254 */ 1255 void 1256 pmu_suspend(void) 1257 { 1258 unsigned long flags; 1259 #ifdef SUSPEND_USES_PMU 1260 struct adb_request *req; 1261 #endif 1262 if (!via) 1263 return; 1264 1265 spin_lock_irqsave(&pmu_lock, flags); 1266 pmu_suspended++; 1267 if (pmu_suspended > 1) { 1268 spin_unlock_irqrestore(&pmu_lock, flags); 1269 return; 1270 } 1271 1272 do { 1273 spin_unlock_irqrestore(&pmu_lock, flags); 1274 if (req_awaiting_reply) 1275 adb_int_pending = 1; 1276 via_pmu_interrupt(0, NULL); 1277 spin_lock_irqsave(&pmu_lock, flags); 1278 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) { 1279 #ifdef SUSPEND_USES_PMU 1280 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 1281 spin_unlock_irqrestore(&pmu_lock, flags); 1282 while(!req.complete) 1283 pmu_poll(); 1284 #else /* SUSPEND_USES_PMU */ 1285 if (gpio_irq >= 0) 1286 disable_irq_nosync(gpio_irq); 1287 out_8(&via[IER], CB1_INT | IER_CLR); 1288 spin_unlock_irqrestore(&pmu_lock, flags); 1289 #endif /* SUSPEND_USES_PMU */ 1290 break; 1291 } 1292 } while (1); 1293 } 1294 1295 void 1296 pmu_resume(void) 1297 { 1298 unsigned long flags; 1299 1300 if (!via || (pmu_suspended < 1)) 1301 return; 1302 1303 spin_lock_irqsave(&pmu_lock, flags); 1304 pmu_suspended--; 1305 if (pmu_suspended > 0) { 1306 spin_unlock_irqrestore(&pmu_lock, flags); 1307 return; 1308 } 1309 adb_int_pending = 1; 1310 #ifdef SUSPEND_USES_PMU 1311 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1312 spin_unlock_irqrestore(&pmu_lock, flags); 1313 while(!req.complete) 1314 pmu_poll(); 1315 #else /* SUSPEND_USES_PMU */ 1316 if (gpio_irq >= 0) 1317 enable_irq(gpio_irq); 1318 out_8(&via[IER], CB1_INT | IER_SET); 1319 spin_unlock_irqrestore(&pmu_lock, flags); 1320 pmu_poll(); 1321 #endif /* SUSPEND_USES_PMU */ 1322 } 1323 1324 /* Interrupt data could be the result data from an ADB cmd */ 1325 static void 1326 pmu_handle_data(unsigned char *data, int len) 1327 { 1328 unsigned char ints, pirq; 1329 int i = 0; 1330 1331 asleep = 0; 1332 if (drop_interrupts || len < 1) { 1333 adb_int_pending = 0; 1334 pmu_irq_stats[8]++; 1335 return; 1336 } 1337 1338 /* Get PMU interrupt mask */ 1339 ints = data[0]; 1340 1341 /* Record zero interrupts for stats */ 1342 if (ints == 0) 1343 pmu_irq_stats[9]++; 1344 1345 /* Hack to deal with ADB autopoll flag */ 1346 if (ints & PMU_INT_ADB) 1347 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL); 1348 1349 next: 1350 1351 if (ints == 0) { 1352 if (i > pmu_irq_stats[10]) 1353 pmu_irq_stats[10] = i; 1354 return; 1355 } 1356 1357 for (pirq = 0; pirq < 8; pirq++) 1358 if (ints & (1 << pirq)) 1359 break; 1360 pmu_irq_stats[pirq]++; 1361 i++; 1362 ints &= ~(1 << pirq); 1363 1364 /* Note: for some reason, we get an interrupt with len=1, 1365 * data[0]==0 after each normal ADB interrupt, at least 1366 * on the Pismo. Still investigating... --BenH 1367 */ 1368 if ((1 << pirq) & PMU_INT_ADB) { 1369 if ((data[0] & PMU_INT_ADB_AUTO) == 0) { 1370 struct adb_request *req = req_awaiting_reply; 1371 if (req == 0) { 1372 printk(KERN_ERR "PMU: extra ADB reply\n"); 1373 return; 1374 } 1375 req_awaiting_reply = NULL; 1376 if (len <= 2) 1377 req->reply_len = 0; 1378 else { 1379 memcpy(req->reply, data + 1, len - 1); 1380 req->reply_len = len - 1; 1381 } 1382 pmu_done(req); 1383 } else { 1384 if (len == 4 && data[1] == 0x2c) { 1385 extern int xmon_wants_key, xmon_adb_keycode; 1386 if (xmon_wants_key) { 1387 xmon_adb_keycode = data[2]; 1388 return; 1389 } 1390 } 1391 #ifdef CONFIG_ADB 1392 /* 1393 * XXX On the [23]400 the PMU gives us an up 1394 * event for keycodes 0x74 or 0x75 when the PC 1395 * card eject buttons are released, so we 1396 * ignore those events. 1397 */ 1398 if (!(pmu_kind == PMU_OHARE_BASED && len == 4 1399 && data[1] == 0x2c && data[3] == 0xff 1400 && (data[2] & ~1) == 0xf4)) 1401 adb_input(data+1, len-1, 1); 1402 #endif /* CONFIG_ADB */ 1403 } 1404 } 1405 /* Sound/brightness button pressed */ 1406 else if ((1 << pirq) & PMU_INT_SNDBRT) { 1407 #ifdef CONFIG_PMAC_BACKLIGHT 1408 if (len == 3) 1409 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4); 1410 #endif 1411 } 1412 /* Tick interrupt */ 1413 else if ((1 << pirq) & PMU_INT_TICK) { 1414 /* Environement or tick interrupt, query batteries */ 1415 if (pmu_battery_count) { 1416 if ((--query_batt_timer) == 0) { 1417 query_battery_state(); 1418 query_batt_timer = BATTERY_POLLING_COUNT; 1419 } 1420 } 1421 } 1422 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) { 1423 if (pmu_battery_count) 1424 query_battery_state(); 1425 pmu_pass_intr(data, len); 1426 /* len == 6 is probably a bad check. But how do I 1427 * know what PMU versions send what events here? */ 1428 if (len == 6) { 1429 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8)); 1430 via_pmu_event(PMU_EVT_LID, data[1]&1); 1431 } 1432 } else { 1433 pmu_pass_intr(data, len); 1434 } 1435 goto next; 1436 } 1437 1438 static struct adb_request* 1439 pmu_sr_intr(void) 1440 { 1441 struct adb_request *req; 1442 int bite = 0; 1443 1444 if (via[B] & TREQ) { 1445 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]); 1446 out_8(&via[IFR], SR_INT); 1447 return NULL; 1448 } 1449 /* The ack may not yet be low when we get the interrupt */ 1450 while ((in_8(&via[B]) & TACK) != 0) 1451 ; 1452 1453 /* if reading grab the byte, and reset the interrupt */ 1454 if (pmu_state == reading || pmu_state == reading_intr) 1455 bite = in_8(&via[SR]); 1456 1457 /* reset TREQ and wait for TACK to go high */ 1458 out_8(&via[B], in_8(&via[B]) | TREQ); 1459 wait_for_ack(); 1460 1461 switch (pmu_state) { 1462 case sending: 1463 req = current_req; 1464 if (data_len < 0) { 1465 data_len = req->nbytes - 1; 1466 send_byte(data_len); 1467 break; 1468 } 1469 if (data_index <= data_len) { 1470 send_byte(req->data[data_index++]); 1471 break; 1472 } 1473 req->sent = 1; 1474 data_len = pmu_data_len[req->data[0]][1]; 1475 if (data_len == 0) { 1476 pmu_state = idle; 1477 current_req = req->next; 1478 if (req->reply_expected) 1479 req_awaiting_reply = req; 1480 else 1481 return req; 1482 } else { 1483 pmu_state = reading; 1484 data_index = 0; 1485 reply_ptr = req->reply + req->reply_len; 1486 recv_byte(); 1487 } 1488 break; 1489 1490 case intack: 1491 data_index = 0; 1492 data_len = -1; 1493 pmu_state = reading_intr; 1494 reply_ptr = interrupt_data[int_data_last]; 1495 recv_byte(); 1496 if (gpio_irq >= 0 && !gpio_irq_enabled) { 1497 enable_irq(gpio_irq); 1498 gpio_irq_enabled = 1; 1499 } 1500 break; 1501 1502 case reading: 1503 case reading_intr: 1504 if (data_len == -1) { 1505 data_len = bite; 1506 if (bite > 32) 1507 printk(KERN_ERR "PMU: bad reply len %d\n", bite); 1508 } else if (data_index < 32) { 1509 reply_ptr[data_index++] = bite; 1510 } 1511 if (data_index < data_len) { 1512 recv_byte(); 1513 break; 1514 } 1515 1516 if (pmu_state == reading_intr) { 1517 pmu_state = idle; 1518 int_data_state[int_data_last] = int_data_ready; 1519 interrupt_data_len[int_data_last] = data_len; 1520 } else { 1521 req = current_req; 1522 /* 1523 * For PMU sleep and freq change requests, we lock the 1524 * PMU until it's explicitely unlocked. This avoids any 1525 * spurrious event polling getting in 1526 */ 1527 current_req = req->next; 1528 req->reply_len += data_index; 1529 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED) 1530 pmu_state = locked; 1531 else 1532 pmu_state = idle; 1533 return req; 1534 } 1535 break; 1536 1537 default: 1538 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n", 1539 pmu_state); 1540 } 1541 return NULL; 1542 } 1543 1544 static irqreturn_t 1545 via_pmu_interrupt(int irq, void *arg) 1546 { 1547 unsigned long flags; 1548 int intr; 1549 int nloop = 0; 1550 int int_data = -1; 1551 struct adb_request *req = NULL; 1552 int handled = 0; 1553 1554 /* This is a bit brutal, we can probably do better */ 1555 spin_lock_irqsave(&pmu_lock, flags); 1556 ++disable_poll; 1557 1558 for (;;) { 1559 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT); 1560 if (intr == 0) 1561 break; 1562 handled = 1; 1563 if (++nloop > 1000) { 1564 printk(KERN_DEBUG "PMU: stuck in intr loop, " 1565 "intr=%x, ier=%x pmu_state=%d\n", 1566 intr, in_8(&via[IER]), pmu_state); 1567 break; 1568 } 1569 out_8(&via[IFR], intr); 1570 if (intr & CB1_INT) { 1571 adb_int_pending = 1; 1572 pmu_irq_stats[0]++; 1573 } 1574 if (intr & SR_INT) { 1575 req = pmu_sr_intr(); 1576 if (req) 1577 break; 1578 } 1579 } 1580 1581 recheck: 1582 if (pmu_state == idle) { 1583 if (adb_int_pending) { 1584 if (int_data_state[0] == int_data_empty) 1585 int_data_last = 0; 1586 else if (int_data_state[1] == int_data_empty) 1587 int_data_last = 1; 1588 else 1589 goto no_free_slot; 1590 pmu_state = intack; 1591 int_data_state[int_data_last] = int_data_fill; 1592 /* Sounds safer to make sure ACK is high before writing. 1593 * This helped kill a problem with ADB and some iBooks 1594 */ 1595 wait_for_ack(); 1596 send_byte(PMU_INT_ACK); 1597 adb_int_pending = 0; 1598 } else if (current_req) 1599 pmu_start(); 1600 } 1601 no_free_slot: 1602 /* Mark the oldest buffer for flushing */ 1603 if (int_data_state[!int_data_last] == int_data_ready) { 1604 int_data_state[!int_data_last] = int_data_flush; 1605 int_data = !int_data_last; 1606 } else if (int_data_state[int_data_last] == int_data_ready) { 1607 int_data_state[int_data_last] = int_data_flush; 1608 int_data = int_data_last; 1609 } 1610 --disable_poll; 1611 spin_unlock_irqrestore(&pmu_lock, flags); 1612 1613 /* Deal with completed PMU requests outside of the lock */ 1614 if (req) { 1615 pmu_done(req); 1616 req = NULL; 1617 } 1618 1619 /* Deal with interrupt datas outside of the lock */ 1620 if (int_data >= 0) { 1621 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]); 1622 spin_lock_irqsave(&pmu_lock, flags); 1623 ++disable_poll; 1624 int_data_state[int_data] = int_data_empty; 1625 int_data = -1; 1626 goto recheck; 1627 } 1628 1629 return IRQ_RETVAL(handled); 1630 } 1631 1632 void 1633 pmu_unlock(void) 1634 { 1635 unsigned long flags; 1636 1637 spin_lock_irqsave(&pmu_lock, flags); 1638 if (pmu_state == locked) 1639 pmu_state = idle; 1640 adb_int_pending = 1; 1641 spin_unlock_irqrestore(&pmu_lock, flags); 1642 } 1643 1644 1645 static irqreturn_t 1646 gpio1_interrupt(int irq, void *arg) 1647 { 1648 unsigned long flags; 1649 1650 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) { 1651 spin_lock_irqsave(&pmu_lock, flags); 1652 if (gpio_irq_enabled > 0) { 1653 disable_irq_nosync(gpio_irq); 1654 gpio_irq_enabled = 0; 1655 } 1656 pmu_irq_stats[1]++; 1657 adb_int_pending = 1; 1658 spin_unlock_irqrestore(&pmu_lock, flags); 1659 via_pmu_interrupt(0, NULL); 1660 return IRQ_HANDLED; 1661 } 1662 return IRQ_NONE; 1663 } 1664 1665 void 1666 pmu_enable_irled(int on) 1667 { 1668 struct adb_request req; 1669 1670 if (vias == NULL) 1671 return ; 1672 if (pmu_kind == PMU_KEYLARGO_BASED) 1673 return ; 1674 1675 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED | 1676 (on ? PMU_POW_ON : PMU_POW_OFF)); 1677 pmu_wait_complete(&req); 1678 } 1679 1680 void 1681 pmu_restart(void) 1682 { 1683 struct adb_request req; 1684 1685 if (via == NULL) 1686 return; 1687 1688 local_irq_disable(); 1689 1690 drop_interrupts = 1; 1691 1692 if (pmu_kind != PMU_KEYLARGO_BASED) { 1693 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1694 PMU_INT_TICK ); 1695 while(!req.complete) 1696 pmu_poll(); 1697 } 1698 1699 pmu_request(&req, NULL, 1, PMU_RESET); 1700 pmu_wait_complete(&req); 1701 for (;;) 1702 ; 1703 } 1704 1705 void 1706 pmu_shutdown(void) 1707 { 1708 struct adb_request req; 1709 1710 if (via == NULL) 1711 return; 1712 1713 local_irq_disable(); 1714 1715 drop_interrupts = 1; 1716 1717 if (pmu_kind != PMU_KEYLARGO_BASED) { 1718 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1719 PMU_INT_TICK ); 1720 pmu_wait_complete(&req); 1721 } else { 1722 /* Disable server mode on shutdown or we'll just 1723 * wake up again 1724 */ 1725 pmu_set_server_mode(0); 1726 } 1727 1728 pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 1729 'M', 'A', 'T', 'T'); 1730 pmu_wait_complete(&req); 1731 for (;;) 1732 ; 1733 } 1734 1735 int 1736 pmu_present(void) 1737 { 1738 return via != 0; 1739 } 1740 1741 #ifdef CONFIG_PM_SLEEP 1742 1743 static LIST_HEAD(sleep_notifiers); 1744 1745 int 1746 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n) 1747 { 1748 struct list_head *list; 1749 struct pmu_sleep_notifier *notifier; 1750 1751 for (list = sleep_notifiers.next; list != &sleep_notifiers; 1752 list = list->next) { 1753 notifier = list_entry(list, struct pmu_sleep_notifier, list); 1754 if (n->priority > notifier->priority) 1755 break; 1756 } 1757 __list_add(&n->list, list->prev, list); 1758 return 0; 1759 } 1760 EXPORT_SYMBOL(pmu_register_sleep_notifier); 1761 1762 int 1763 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n) 1764 { 1765 if (n->list.next == 0) 1766 return -ENOENT; 1767 list_del(&n->list); 1768 n->list.next = NULL; 1769 return 0; 1770 } 1771 EXPORT_SYMBOL(pmu_unregister_sleep_notifier); 1772 #endif /* CONFIG_PM_SLEEP */ 1773 1774 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32) 1775 1776 /* Sleep is broadcast last-to-first */ 1777 static void broadcast_sleep(int when) 1778 { 1779 struct list_head *list; 1780 struct pmu_sleep_notifier *notifier; 1781 1782 for (list = sleep_notifiers.prev; list != &sleep_notifiers; 1783 list = list->prev) { 1784 notifier = list_entry(list, struct pmu_sleep_notifier, list); 1785 notifier->notifier_call(notifier, when); 1786 } 1787 } 1788 1789 /* Wake is broadcast first-to-last */ 1790 static void broadcast_wake(void) 1791 { 1792 struct list_head *list; 1793 struct pmu_sleep_notifier *notifier; 1794 1795 for (list = sleep_notifiers.next; list != &sleep_notifiers; 1796 list = list->next) { 1797 notifier = list_entry(list, struct pmu_sleep_notifier, list); 1798 notifier->notifier_call(notifier, PBOOK_WAKE); 1799 } 1800 } 1801 1802 /* 1803 * This struct is used to store config register values for 1804 * PCI devices which may get powered off when we sleep. 1805 */ 1806 static struct pci_save { 1807 #ifndef HACKED_PCI_SAVE 1808 u16 command; 1809 u16 cache_lat; 1810 u16 intr; 1811 u32 rom_address; 1812 #else 1813 u32 config[16]; 1814 #endif 1815 } *pbook_pci_saves; 1816 static int pbook_npci_saves; 1817 1818 static void 1819 pbook_alloc_pci_save(void) 1820 { 1821 int npci; 1822 struct pci_dev *pd = NULL; 1823 1824 npci = 0; 1825 while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 1826 ++npci; 1827 } 1828 if (npci == 0) 1829 return; 1830 pbook_pci_saves = (struct pci_save *) 1831 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL); 1832 pbook_npci_saves = npci; 1833 } 1834 1835 static void 1836 pbook_free_pci_save(void) 1837 { 1838 if (pbook_pci_saves == NULL) 1839 return; 1840 kfree(pbook_pci_saves); 1841 pbook_pci_saves = NULL; 1842 pbook_npci_saves = 0; 1843 } 1844 1845 static void 1846 pbook_pci_save(void) 1847 { 1848 struct pci_save *ps = pbook_pci_saves; 1849 struct pci_dev *pd = NULL; 1850 int npci = pbook_npci_saves; 1851 1852 if (ps == NULL) 1853 return; 1854 1855 while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 1856 if (npci-- == 0) { 1857 pci_dev_put(pd); 1858 return; 1859 } 1860 #ifndef HACKED_PCI_SAVE 1861 pci_read_config_word(pd, PCI_COMMAND, &ps->command); 1862 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat); 1863 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr); 1864 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address); 1865 #else 1866 int i; 1867 for (i=1;i<16;i++) 1868 pci_read_config_dword(pd, i<<4, &ps->config[i]); 1869 #endif 1870 ++ps; 1871 } 1872 } 1873 1874 /* For this to work, we must take care of a few things: If gmac was enabled 1875 * during boot, it will be in the pci dev list. If it's disabled at this point 1876 * (and it will probably be), then you can't access it's config space. 1877 */ 1878 static void 1879 pbook_pci_restore(void) 1880 { 1881 u16 cmd; 1882 struct pci_save *ps = pbook_pci_saves - 1; 1883 struct pci_dev *pd = NULL; 1884 int npci = pbook_npci_saves; 1885 int j; 1886 1887 while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 1888 #ifdef HACKED_PCI_SAVE 1889 int i; 1890 if (npci-- == 0) { 1891 pci_dev_put(pd); 1892 return; 1893 } 1894 ps++; 1895 for (i=2;i<16;i++) 1896 pci_write_config_dword(pd, i<<4, ps->config[i]); 1897 pci_write_config_dword(pd, 4, ps->config[1]); 1898 #else 1899 if (npci-- == 0) 1900 return; 1901 ps++; 1902 if (ps->command == 0) 1903 continue; 1904 pci_read_config_word(pd, PCI_COMMAND, &cmd); 1905 if ((ps->command & ~cmd) == 0) 1906 continue; 1907 switch (pd->hdr_type) { 1908 case PCI_HEADER_TYPE_NORMAL: 1909 for (j = 0; j < 6; ++j) 1910 pci_write_config_dword(pd, 1911 PCI_BASE_ADDRESS_0 + j*4, 1912 pd->resource[j].start); 1913 pci_write_config_dword(pd, PCI_ROM_ADDRESS, 1914 ps->rom_address); 1915 pci_write_config_word(pd, PCI_CACHE_LINE_SIZE, 1916 ps->cache_lat); 1917 pci_write_config_word(pd, PCI_INTERRUPT_LINE, 1918 ps->intr); 1919 pci_write_config_word(pd, PCI_COMMAND, ps->command); 1920 break; 1921 } 1922 #endif 1923 } 1924 } 1925 1926 #ifdef DEBUG_SLEEP 1927 /* N.B. This doesn't work on the 3400 */ 1928 void 1929 pmu_blink(int n) 1930 { 1931 struct adb_request req; 1932 1933 memset(&req, 0, sizeof(req)); 1934 1935 for (; n > 0; --n) { 1936 req.nbytes = 4; 1937 req.done = NULL; 1938 req.data[0] = 0xee; 1939 req.data[1] = 4; 1940 req.data[2] = 0; 1941 req.data[3] = 1; 1942 req.reply[0] = ADB_RET_OK; 1943 req.reply_len = 1; 1944 req.reply_expected = 0; 1945 pmu_polled_request(&req); 1946 mdelay(50); 1947 req.nbytes = 4; 1948 req.done = NULL; 1949 req.data[0] = 0xee; 1950 req.data[1] = 4; 1951 req.data[2] = 0; 1952 req.data[3] = 0; 1953 req.reply[0] = ADB_RET_OK; 1954 req.reply_len = 1; 1955 req.reply_expected = 0; 1956 pmu_polled_request(&req); 1957 mdelay(50); 1958 } 1959 mdelay(50); 1960 } 1961 #endif 1962 1963 /* 1964 * Put the powerbook to sleep. 1965 */ 1966 1967 static u32 save_via[8]; 1968 1969 static void 1970 save_via_state(void) 1971 { 1972 save_via[0] = in_8(&via[ANH]); 1973 save_via[1] = in_8(&via[DIRA]); 1974 save_via[2] = in_8(&via[B]); 1975 save_via[3] = in_8(&via[DIRB]); 1976 save_via[4] = in_8(&via[PCR]); 1977 save_via[5] = in_8(&via[ACR]); 1978 save_via[6] = in_8(&via[T1CL]); 1979 save_via[7] = in_8(&via[T1CH]); 1980 } 1981 static void 1982 restore_via_state(void) 1983 { 1984 out_8(&via[ANH], save_via[0]); 1985 out_8(&via[DIRA], save_via[1]); 1986 out_8(&via[B], save_via[2]); 1987 out_8(&via[DIRB], save_via[3]); 1988 out_8(&via[PCR], save_via[4]); 1989 out_8(&via[ACR], save_via[5]); 1990 out_8(&via[T1CL], save_via[6]); 1991 out_8(&via[T1CH], save_via[7]); 1992 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 1993 out_8(&via[IFR], 0x7f); /* clear IFR */ 1994 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 1995 } 1996 1997 extern void pmu_backlight_set_sleep(int sleep); 1998 1999 static int 2000 pmac_suspend_devices(void) 2001 { 2002 int ret; 2003 2004 pm_prepare_console(); 2005 2006 /* Notify old-style device drivers */ 2007 broadcast_sleep(PBOOK_SLEEP_REQUEST); 2008 2009 /* Sync the disks. */ 2010 /* XXX It would be nice to have some way to ensure that 2011 * nobody is dirtying any new buffers while we wait. That 2012 * could be achieved using the refrigerator for processes 2013 * that swsusp uses 2014 */ 2015 sys_sync(); 2016 2017 broadcast_sleep(PBOOK_SLEEP_NOW); 2018 2019 /* Send suspend call to devices, hold the device core's dpm_sem */ 2020 ret = device_suspend(PMSG_SUSPEND); 2021 if (ret) { 2022 broadcast_wake(); 2023 printk(KERN_ERR "Driver sleep failed\n"); 2024 return -EBUSY; 2025 } 2026 2027 #ifdef CONFIG_PMAC_BACKLIGHT 2028 /* Tell backlight code not to muck around with the chip anymore */ 2029 pmu_backlight_set_sleep(1); 2030 #endif 2031 2032 /* Call platform functions marked "on sleep" */ 2033 pmac_pfunc_i2c_suspend(); 2034 pmac_pfunc_base_suspend(); 2035 2036 /* Stop preemption */ 2037 preempt_disable(); 2038 2039 /* Make sure the decrementer won't interrupt us */ 2040 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 2041 /* Make sure any pending DEC interrupt occurring while we did 2042 * the above didn't re-enable the DEC */ 2043 mb(); 2044 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 2045 2046 /* We can now disable MSR_EE. This code of course works properly only 2047 * on UP machines... For SMP, if we ever implement sleep, we'll have to 2048 * stop the "other" CPUs way before we do all that stuff. 2049 */ 2050 local_irq_disable(); 2051 2052 /* Broadcast power down irq 2053 * This isn't that useful in most cases (only directly wired devices can 2054 * use this but still... This will take care of sysdev's as well, so 2055 * we exit from here with local irqs disabled and PIC off. 2056 */ 2057 ret = device_power_down(PMSG_SUSPEND); 2058 if (ret) { 2059 wakeup_decrementer(); 2060 local_irq_enable(); 2061 preempt_enable(); 2062 device_resume(); 2063 broadcast_wake(); 2064 printk(KERN_ERR "Driver powerdown failed\n"); 2065 return -EBUSY; 2066 } 2067 2068 /* Wait for completion of async requests */ 2069 while (!batt_req.complete) 2070 pmu_poll(); 2071 2072 /* Giveup the lazy FPU & vec so we don't have to back them 2073 * up from the low level code 2074 */ 2075 enable_kernel_fp(); 2076 2077 #ifdef CONFIG_ALTIVEC 2078 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 2079 enable_kernel_altivec(); 2080 #endif /* CONFIG_ALTIVEC */ 2081 2082 return 0; 2083 } 2084 2085 static int 2086 pmac_wakeup_devices(void) 2087 { 2088 mdelay(100); 2089 2090 #ifdef CONFIG_PMAC_BACKLIGHT 2091 /* Tell backlight code it can use the chip again */ 2092 pmu_backlight_set_sleep(0); 2093 #endif 2094 2095 /* Power back up system devices (including the PIC) */ 2096 device_power_up(); 2097 2098 /* Force a poll of ADB interrupts */ 2099 adb_int_pending = 1; 2100 via_pmu_interrupt(0, NULL); 2101 2102 /* Restart jiffies & scheduling */ 2103 wakeup_decrementer(); 2104 2105 /* Re-enable local CPU interrupts */ 2106 local_irq_enable(); 2107 mdelay(10); 2108 preempt_enable(); 2109 2110 /* Call platform functions marked "on wake" */ 2111 pmac_pfunc_base_resume(); 2112 pmac_pfunc_i2c_resume(); 2113 2114 /* Resume devices */ 2115 device_resume(); 2116 2117 /* Notify old style drivers */ 2118 broadcast_wake(); 2119 2120 pm_restore_console(); 2121 2122 return 0; 2123 } 2124 2125 #define GRACKLE_PM (1<<7) 2126 #define GRACKLE_DOZE (1<<5) 2127 #define GRACKLE_NAP (1<<4) 2128 #define GRACKLE_SLEEP (1<<3) 2129 2130 static int powerbook_sleep_grackle(void) 2131 { 2132 unsigned long save_l2cr; 2133 unsigned short pmcr1; 2134 struct adb_request req; 2135 int ret; 2136 struct pci_dev *grackle; 2137 2138 grackle = pci_get_bus_and_slot(0, 0); 2139 if (!grackle) 2140 return -ENODEV; 2141 2142 ret = pmac_suspend_devices(); 2143 if (ret) { 2144 printk(KERN_ERR "Sleep rejected by devices\n"); 2145 return ret; 2146 } 2147 2148 /* Turn off various things. Darwin does some retry tests here... */ 2149 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE); 2150 pmu_wait_complete(&req); 2151 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 2152 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY); 2153 pmu_wait_complete(&req); 2154 2155 /* For 750, save backside cache setting and disable it */ 2156 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 2157 2158 if (!__fake_sleep) { 2159 /* Ask the PMU to put us to sleep */ 2160 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2161 pmu_wait_complete(&req); 2162 } 2163 2164 /* The VIA is supposed not to be restored correctly*/ 2165 save_via_state(); 2166 /* We shut down some HW */ 2167 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 2168 2169 pci_read_config_word(grackle, 0x70, &pmcr1); 2170 /* Apparently, MacOS uses NAP mode for Grackle ??? */ 2171 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 2172 pmcr1 |= GRACKLE_PM|GRACKLE_NAP; 2173 pci_write_config_word(grackle, 0x70, pmcr1); 2174 2175 /* Call low-level ASM sleep handler */ 2176 if (__fake_sleep) 2177 mdelay(5000); 2178 else 2179 low_sleep_handler(); 2180 2181 /* We're awake again, stop grackle PM */ 2182 pci_read_config_word(grackle, 0x70, &pmcr1); 2183 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 2184 pci_write_config_word(grackle, 0x70, pmcr1); 2185 2186 pci_dev_put(grackle); 2187 2188 /* Make sure the PMU is idle */ 2189 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 2190 restore_via_state(); 2191 2192 /* Restore L2 cache */ 2193 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2194 _set_L2CR(save_l2cr); 2195 2196 /* Restore userland MMU context */ 2197 set_context(current->active_mm->context.id, current->active_mm->pgd); 2198 2199 /* Power things up */ 2200 pmu_unlock(); 2201 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2202 pmu_wait_complete(&req); 2203 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, 2204 PMU_POW0_ON|PMU_POW0_HARD_DRIVE); 2205 pmu_wait_complete(&req); 2206 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 2207 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY); 2208 pmu_wait_complete(&req); 2209 2210 pmac_wakeup_devices(); 2211 2212 return 0; 2213 } 2214 2215 static int 2216 powerbook_sleep_Core99(void) 2217 { 2218 unsigned long save_l2cr; 2219 unsigned long save_l3cr; 2220 struct adb_request req; 2221 int ret; 2222 2223 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) { 2224 printk(KERN_ERR "Sleep mode not supported on this machine\n"); 2225 return -ENOSYS; 2226 } 2227 2228 if (num_online_cpus() > 1 || cpu_is_offline(0)) 2229 return -EAGAIN; 2230 2231 ret = pmac_suspend_devices(); 2232 if (ret) { 2233 printk(KERN_ERR "Sleep rejected by devices\n"); 2234 return ret; 2235 } 2236 2237 /* Stop environment and ADB interrupts */ 2238 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 2239 pmu_wait_complete(&req); 2240 2241 /* Tell PMU what events will wake us up */ 2242 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS, 2243 0xff, 0xff); 2244 pmu_wait_complete(&req); 2245 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS, 2246 0, PMU_PWR_WAKEUP_KEY | 2247 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0)); 2248 pmu_wait_complete(&req); 2249 2250 /* Save the state of the L2 and L3 caches */ 2251 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */ 2252 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 2253 2254 if (!__fake_sleep) { 2255 /* Ask the PMU to put us to sleep */ 2256 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2257 pmu_wait_complete(&req); 2258 } 2259 2260 /* The VIA is supposed not to be restored correctly*/ 2261 save_via_state(); 2262 2263 /* Shut down various ASICs. There's a chance that we can no longer 2264 * talk to the PMU after this, so I moved it to _after_ sending the 2265 * sleep command to it. Still need to be checked. 2266 */ 2267 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 2268 2269 /* Call low-level ASM sleep handler */ 2270 if (__fake_sleep) 2271 mdelay(5000); 2272 else 2273 low_sleep_handler(); 2274 2275 /* Restore Apple core ASICs state */ 2276 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 2277 2278 /* Restore VIA */ 2279 restore_via_state(); 2280 2281 /* tweak LPJ before cpufreq is there */ 2282 loops_per_jiffy *= 2; 2283 2284 /* Restore video */ 2285 pmac_call_early_video_resume(); 2286 2287 /* Restore L2 cache */ 2288 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2289 _set_L2CR(save_l2cr); 2290 /* Restore L3 cache */ 2291 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0) 2292 _set_L3CR(save_l3cr); 2293 2294 /* Restore userland MMU context */ 2295 set_context(current->active_mm->context.id, current->active_mm->pgd); 2296 2297 /* Tell PMU we are ready */ 2298 pmu_unlock(); 2299 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2300 pmu_wait_complete(&req); 2301 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2302 pmu_wait_complete(&req); 2303 2304 /* Restore LPJ, cpufreq will adjust the cpu frequency */ 2305 loops_per_jiffy /= 2; 2306 2307 pmac_wakeup_devices(); 2308 2309 return 0; 2310 } 2311 2312 #define PB3400_MEM_CTRL 0xf8000000 2313 #define PB3400_MEM_CTRL_SLEEP 0x70 2314 2315 static int 2316 powerbook_sleep_3400(void) 2317 { 2318 int ret, i, x; 2319 unsigned int hid0; 2320 unsigned long p; 2321 struct adb_request sleep_req; 2322 void __iomem *mem_ctrl; 2323 unsigned int __iomem *mem_ctrl_sleep; 2324 2325 /* first map in the memory controller registers */ 2326 mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100); 2327 if (mem_ctrl == NULL) { 2328 printk("powerbook_sleep_3400: ioremap failed\n"); 2329 return -ENOMEM; 2330 } 2331 mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP; 2332 2333 /* Allocate room for PCI save */ 2334 pbook_alloc_pci_save(); 2335 2336 ret = pmac_suspend_devices(); 2337 if (ret) { 2338 pbook_free_pci_save(); 2339 printk(KERN_ERR "Sleep rejected by devices\n"); 2340 return ret; 2341 } 2342 2343 /* Save the state of PCI config space for some slots */ 2344 pbook_pci_save(); 2345 2346 /* Set the memory controller to keep the memory refreshed 2347 while we're asleep */ 2348 for (i = 0x403f; i >= 0x4000; --i) { 2349 out_be32(mem_ctrl_sleep, i); 2350 do { 2351 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff; 2352 } while (x == 0); 2353 if (x >= 0x100) 2354 break; 2355 } 2356 2357 /* Ask the PMU to put us to sleep */ 2358 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2359 while (!sleep_req.complete) 2360 mb(); 2361 2362 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 2363 2364 /* displacement-flush the L2 cache - necessary? */ 2365 for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000) 2366 i = *(volatile int *)p; 2367 asleep = 1; 2368 2369 /* Put the CPU into sleep mode */ 2370 hid0 = mfspr(SPRN_HID0); 2371 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP; 2372 mtspr(SPRN_HID0, hid0); 2373 mtmsr(mfmsr() | MSR_POW | MSR_EE); 2374 udelay(10); 2375 2376 /* OK, we're awake again, start restoring things */ 2377 out_be32(mem_ctrl_sleep, 0x3f); 2378 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 2379 pbook_pci_restore(); 2380 pmu_unlock(); 2381 2382 /* wait for the PMU interrupt sequence to complete */ 2383 while (asleep) 2384 mb(); 2385 2386 pmac_wakeup_devices(); 2387 pbook_free_pci_save(); 2388 iounmap(mem_ctrl); 2389 2390 return 0; 2391 } 2392 2393 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */ 2394 2395 /* 2396 * Support for /dev/pmu device 2397 */ 2398 #define RB_SIZE 0x10 2399 struct pmu_private { 2400 struct list_head list; 2401 int rb_get; 2402 int rb_put; 2403 struct rb_entry { 2404 unsigned short len; 2405 unsigned char data[16]; 2406 } rb_buf[RB_SIZE]; 2407 wait_queue_head_t wait; 2408 spinlock_t lock; 2409 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2410 int backlight_locker; 2411 #endif 2412 }; 2413 2414 static LIST_HEAD(all_pmu_pvt); 2415 static DEFINE_SPINLOCK(all_pvt_lock); 2416 2417 static void 2418 pmu_pass_intr(unsigned char *data, int len) 2419 { 2420 struct pmu_private *pp; 2421 struct list_head *list; 2422 int i; 2423 unsigned long flags; 2424 2425 if (len > sizeof(pp->rb_buf[0].data)) 2426 len = sizeof(pp->rb_buf[0].data); 2427 spin_lock_irqsave(&all_pvt_lock, flags); 2428 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) { 2429 pp = list_entry(list, struct pmu_private, list); 2430 spin_lock(&pp->lock); 2431 i = pp->rb_put + 1; 2432 if (i >= RB_SIZE) 2433 i = 0; 2434 if (i != pp->rb_get) { 2435 struct rb_entry *rp = &pp->rb_buf[pp->rb_put]; 2436 rp->len = len; 2437 memcpy(rp->data, data, len); 2438 pp->rb_put = i; 2439 wake_up_interruptible(&pp->wait); 2440 } 2441 spin_unlock(&pp->lock); 2442 } 2443 spin_unlock_irqrestore(&all_pvt_lock, flags); 2444 } 2445 2446 static int 2447 pmu_open(struct inode *inode, struct file *file) 2448 { 2449 struct pmu_private *pp; 2450 unsigned long flags; 2451 2452 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL); 2453 if (pp == 0) 2454 return -ENOMEM; 2455 pp->rb_get = pp->rb_put = 0; 2456 spin_lock_init(&pp->lock); 2457 init_waitqueue_head(&pp->wait); 2458 spin_lock_irqsave(&all_pvt_lock, flags); 2459 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2460 pp->backlight_locker = 0; 2461 #endif 2462 list_add(&pp->list, &all_pmu_pvt); 2463 spin_unlock_irqrestore(&all_pvt_lock, flags); 2464 file->private_data = pp; 2465 return 0; 2466 } 2467 2468 static ssize_t 2469 pmu_read(struct file *file, char __user *buf, 2470 size_t count, loff_t *ppos) 2471 { 2472 struct pmu_private *pp = file->private_data; 2473 DECLARE_WAITQUEUE(wait, current); 2474 unsigned long flags; 2475 int ret = 0; 2476 2477 if (count < 1 || pp == 0) 2478 return -EINVAL; 2479 if (!access_ok(VERIFY_WRITE, buf, count)) 2480 return -EFAULT; 2481 2482 spin_lock_irqsave(&pp->lock, flags); 2483 add_wait_queue(&pp->wait, &wait); 2484 current->state = TASK_INTERRUPTIBLE; 2485 2486 for (;;) { 2487 ret = -EAGAIN; 2488 if (pp->rb_get != pp->rb_put) { 2489 int i = pp->rb_get; 2490 struct rb_entry *rp = &pp->rb_buf[i]; 2491 ret = rp->len; 2492 spin_unlock_irqrestore(&pp->lock, flags); 2493 if (ret > count) 2494 ret = count; 2495 if (ret > 0 && copy_to_user(buf, rp->data, ret)) 2496 ret = -EFAULT; 2497 if (++i >= RB_SIZE) 2498 i = 0; 2499 spin_lock_irqsave(&pp->lock, flags); 2500 pp->rb_get = i; 2501 } 2502 if (ret >= 0) 2503 break; 2504 if (file->f_flags & O_NONBLOCK) 2505 break; 2506 ret = -ERESTARTSYS; 2507 if (signal_pending(current)) 2508 break; 2509 spin_unlock_irqrestore(&pp->lock, flags); 2510 schedule(); 2511 spin_lock_irqsave(&pp->lock, flags); 2512 } 2513 current->state = TASK_RUNNING; 2514 remove_wait_queue(&pp->wait, &wait); 2515 spin_unlock_irqrestore(&pp->lock, flags); 2516 2517 return ret; 2518 } 2519 2520 static ssize_t 2521 pmu_write(struct file *file, const char __user *buf, 2522 size_t count, loff_t *ppos) 2523 { 2524 return 0; 2525 } 2526 2527 static unsigned int 2528 pmu_fpoll(struct file *filp, poll_table *wait) 2529 { 2530 struct pmu_private *pp = filp->private_data; 2531 unsigned int mask = 0; 2532 unsigned long flags; 2533 2534 if (pp == 0) 2535 return 0; 2536 poll_wait(filp, &pp->wait, wait); 2537 spin_lock_irqsave(&pp->lock, flags); 2538 if (pp->rb_get != pp->rb_put) 2539 mask |= POLLIN; 2540 spin_unlock_irqrestore(&pp->lock, flags); 2541 return mask; 2542 } 2543 2544 static int 2545 pmu_release(struct inode *inode, struct file *file) 2546 { 2547 struct pmu_private *pp = file->private_data; 2548 unsigned long flags; 2549 2550 lock_kernel(); 2551 if (pp != 0) { 2552 file->private_data = NULL; 2553 spin_lock_irqsave(&all_pvt_lock, flags); 2554 list_del(&pp->list); 2555 spin_unlock_irqrestore(&all_pvt_lock, flags); 2556 2557 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2558 if (pp->backlight_locker) 2559 pmac_backlight_enable(); 2560 #endif 2561 2562 kfree(pp); 2563 } 2564 unlock_kernel(); 2565 return 0; 2566 } 2567 2568 static int 2569 pmu_ioctl(struct inode * inode, struct file *filp, 2570 u_int cmd, u_long arg) 2571 { 2572 __u32 __user *argp = (__u32 __user *)arg; 2573 int error = -EINVAL; 2574 2575 switch (cmd) { 2576 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32) 2577 case PMU_IOC_SLEEP: 2578 if (!capable(CAP_SYS_ADMIN)) 2579 return -EACCES; 2580 if (sleep_in_progress) 2581 return -EBUSY; 2582 sleep_in_progress = 1; 2583 switch (pmu_kind) { 2584 case PMU_OHARE_BASED: 2585 error = powerbook_sleep_3400(); 2586 break; 2587 case PMU_HEATHROW_BASED: 2588 case PMU_PADDINGTON_BASED: 2589 error = powerbook_sleep_grackle(); 2590 break; 2591 case PMU_KEYLARGO_BASED: 2592 error = powerbook_sleep_Core99(); 2593 break; 2594 default: 2595 error = -ENOSYS; 2596 } 2597 sleep_in_progress = 0; 2598 break; 2599 case PMU_IOC_CAN_SLEEP: 2600 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) 2601 return put_user(0, argp); 2602 else 2603 return put_user(1, argp); 2604 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */ 2605 2606 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY 2607 /* Compatibility ioctl's for backlight */ 2608 case PMU_IOC_GET_BACKLIGHT: 2609 { 2610 int brightness; 2611 2612 if (sleep_in_progress) 2613 return -EBUSY; 2614 2615 brightness = pmac_backlight_get_legacy_brightness(); 2616 if (brightness < 0) 2617 return brightness; 2618 else 2619 return put_user(brightness, argp); 2620 2621 } 2622 case PMU_IOC_SET_BACKLIGHT: 2623 { 2624 int brightness; 2625 2626 if (sleep_in_progress) 2627 return -EBUSY; 2628 2629 error = get_user(brightness, argp); 2630 if (error) 2631 return error; 2632 2633 return pmac_backlight_set_legacy_brightness(brightness); 2634 } 2635 #ifdef CONFIG_INPUT_ADBHID 2636 case PMU_IOC_GRAB_BACKLIGHT: { 2637 struct pmu_private *pp = filp->private_data; 2638 2639 if (pp->backlight_locker) 2640 return 0; 2641 2642 pp->backlight_locker = 1; 2643 pmac_backlight_disable(); 2644 2645 return 0; 2646 } 2647 #endif /* CONFIG_INPUT_ADBHID */ 2648 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */ 2649 2650 case PMU_IOC_GET_MODEL: 2651 return put_user(pmu_kind, argp); 2652 case PMU_IOC_HAS_ADB: 2653 return put_user(pmu_has_adb, argp); 2654 } 2655 return error; 2656 } 2657 2658 static const struct file_operations pmu_device_fops = { 2659 .read = pmu_read, 2660 .write = pmu_write, 2661 .poll = pmu_fpoll, 2662 .ioctl = pmu_ioctl, 2663 .open = pmu_open, 2664 .release = pmu_release, 2665 }; 2666 2667 static struct miscdevice pmu_device = { 2668 PMU_MINOR, "pmu", &pmu_device_fops 2669 }; 2670 2671 static int pmu_device_init(void) 2672 { 2673 if (!via) 2674 return 0; 2675 if (misc_register(&pmu_device) < 0) 2676 printk(KERN_ERR "via-pmu: cannot register misc device.\n"); 2677 return 0; 2678 } 2679 device_initcall(pmu_device_init); 2680 2681 2682 #ifdef DEBUG_SLEEP 2683 static inline void 2684 polled_handshake(volatile unsigned char __iomem *via) 2685 { 2686 via[B] &= ~TREQ; eieio(); 2687 while ((via[B] & TACK) != 0) 2688 ; 2689 via[B] |= TREQ; eieio(); 2690 while ((via[B] & TACK) == 0) 2691 ; 2692 } 2693 2694 static inline void 2695 polled_send_byte(volatile unsigned char __iomem *via, int x) 2696 { 2697 via[ACR] |= SR_OUT | SR_EXT; eieio(); 2698 via[SR] = x; eieio(); 2699 polled_handshake(via); 2700 } 2701 2702 static inline int 2703 polled_recv_byte(volatile unsigned char __iomem *via) 2704 { 2705 int x; 2706 2707 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio(); 2708 x = via[SR]; eieio(); 2709 polled_handshake(via); 2710 x = via[SR]; eieio(); 2711 return x; 2712 } 2713 2714 int 2715 pmu_polled_request(struct adb_request *req) 2716 { 2717 unsigned long flags; 2718 int i, l, c; 2719 volatile unsigned char __iomem *v = via; 2720 2721 req->complete = 1; 2722 c = req->data[0]; 2723 l = pmu_data_len[c][0]; 2724 if (l >= 0 && req->nbytes != l + 1) 2725 return -EINVAL; 2726 2727 local_irq_save(flags); 2728 while (pmu_state != idle) 2729 pmu_poll(); 2730 2731 while ((via[B] & TACK) == 0) 2732 ; 2733 polled_send_byte(v, c); 2734 if (l < 0) { 2735 l = req->nbytes - 1; 2736 polled_send_byte(v, l); 2737 } 2738 for (i = 1; i <= l; ++i) 2739 polled_send_byte(v, req->data[i]); 2740 2741 l = pmu_data_len[c][1]; 2742 if (l < 0) 2743 l = polled_recv_byte(v); 2744 for (i = 0; i < l; ++i) 2745 req->reply[i + req->reply_len] = polled_recv_byte(v); 2746 2747 if (req->done) 2748 (*req->done)(req); 2749 2750 local_irq_restore(flags); 2751 return 0; 2752 } 2753 #endif /* DEBUG_SLEEP */ 2754 2755 2756 /* FIXME: This is a temporary set of callbacks to enable us 2757 * to do suspend-to-disk. 2758 */ 2759 2760 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32) 2761 2762 int pmu_sys_suspended; 2763 2764 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state) 2765 { 2766 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended) 2767 return 0; 2768 2769 /* Suspend PMU event interrupts */ 2770 pmu_suspend(); 2771 2772 pmu_sys_suspended = 1; 2773 return 0; 2774 } 2775 2776 static int pmu_sys_resume(struct sys_device *sysdev) 2777 { 2778 struct adb_request req; 2779 2780 if (!pmu_sys_suspended) 2781 return 0; 2782 2783 /* Tell PMU we are ready */ 2784 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2785 pmu_wait_complete(&req); 2786 2787 /* Resume PMU event interrupts */ 2788 pmu_resume(); 2789 2790 pmu_sys_suspended = 0; 2791 2792 return 0; 2793 } 2794 2795 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */ 2796 2797 static struct sysdev_class pmu_sysclass = { 2798 set_kset_name("pmu"), 2799 }; 2800 2801 static struct sys_device device_pmu = { 2802 .cls = &pmu_sysclass, 2803 }; 2804 2805 static struct sysdev_driver driver_pmu = { 2806 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32) 2807 .suspend = &pmu_sys_suspend, 2808 .resume = &pmu_sys_resume, 2809 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */ 2810 }; 2811 2812 static int __init init_pmu_sysfs(void) 2813 { 2814 int rc; 2815 2816 rc = sysdev_class_register(&pmu_sysclass); 2817 if (rc) { 2818 printk(KERN_ERR "Failed registering PMU sys class\n"); 2819 return -ENODEV; 2820 } 2821 rc = sysdev_register(&device_pmu); 2822 if (rc) { 2823 printk(KERN_ERR "Failed registering PMU sys device\n"); 2824 return -ENODEV; 2825 } 2826 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu); 2827 if (rc) { 2828 printk(KERN_ERR "Failed registering PMU sys driver\n"); 2829 return -ENODEV; 2830 } 2831 return 0; 2832 } 2833 2834 subsys_initcall(init_pmu_sysfs); 2835 2836 EXPORT_SYMBOL(pmu_request); 2837 EXPORT_SYMBOL(pmu_queue_request); 2838 EXPORT_SYMBOL(pmu_poll); 2839 EXPORT_SYMBOL(pmu_poll_adb); 2840 EXPORT_SYMBOL(pmu_wait_complete); 2841 EXPORT_SYMBOL(pmu_suspend); 2842 EXPORT_SYMBOL(pmu_resume); 2843 EXPORT_SYMBOL(pmu_unlock); 2844 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32) 2845 EXPORT_SYMBOL(pmu_enable_irled); 2846 EXPORT_SYMBOL(pmu_battery_count); 2847 EXPORT_SYMBOL(pmu_batteries); 2848 EXPORT_SYMBOL(pmu_power_flags); 2849 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */ 2850 2851