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/suspend.h> 46 #include <linux/syscalls.h> 47 #include <linux/cpu.h> 48 #include <asm/prom.h> 49 #include <asm/machdep.h> 50 #include <asm/io.h> 51 #include <asm/pgtable.h> 52 #include <asm/system.h> 53 #include <asm/sections.h> 54 #include <asm/irq.h> 55 #include <asm/pmac_feature.h> 56 #include <asm/pmac_pfunc.h> 57 #include <asm/pmac_low_i2c.h> 58 #include <asm/uaccess.h> 59 #include <asm/mmu_context.h> 60 #include <asm/cputable.h> 61 #include <asm/time.h> 62 #include <asm/backlight.h> 63 64 #include "via-pmu-event.h" 65 66 /* Some compile options */ 67 #undef SUSPEND_USES_PMU 68 #define DEBUG_SLEEP 69 #undef HACKED_PCI_SAVE 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 77 static volatile unsigned char __iomem *via; 78 79 /* VIA registers - spaced 0x200 bytes apart */ 80 #define RS 0x200 /* skip between registers */ 81 #define B 0 /* B-side data */ 82 #define A RS /* A-side data */ 83 #define DIRB (2*RS) /* B-side direction (1=output) */ 84 #define DIRA (3*RS) /* A-side direction (1=output) */ 85 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */ 86 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */ 87 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */ 88 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */ 89 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */ 90 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */ 91 #define SR (10*RS) /* Shift register */ 92 #define ACR (11*RS) /* Auxiliary control register */ 93 #define PCR (12*RS) /* Peripheral control register */ 94 #define IFR (13*RS) /* Interrupt flag register */ 95 #define IER (14*RS) /* Interrupt enable register */ 96 #define ANH (15*RS) /* A-side data, no handshake */ 97 98 /* Bits in B data register: both active low */ 99 #define TACK 0x08 /* Transfer acknowledge (input) */ 100 #define TREQ 0x10 /* Transfer request (output) */ 101 102 /* Bits in ACR */ 103 #define SR_CTRL 0x1c /* Shift register control bits */ 104 #define SR_EXT 0x0c /* Shift on external clock */ 105 #define SR_OUT 0x10 /* Shift out if 1 */ 106 107 /* Bits in IFR and IER */ 108 #define IER_SET 0x80 /* set bits in IER */ 109 #define IER_CLR 0 /* clear bits in IER */ 110 #define SR_INT 0x04 /* Shift register full/empty */ 111 #define CB2_INT 0x08 112 #define CB1_INT 0x10 /* transition on CB1 input */ 113 114 static volatile enum pmu_state { 115 idle, 116 sending, 117 intack, 118 reading, 119 reading_intr, 120 locked, 121 } pmu_state; 122 123 static volatile enum int_data_state { 124 int_data_empty, 125 int_data_fill, 126 int_data_ready, 127 int_data_flush 128 } int_data_state[2] = { int_data_empty, int_data_empty }; 129 130 static struct adb_request *current_req; 131 static struct adb_request *last_req; 132 static struct adb_request *req_awaiting_reply; 133 static unsigned char interrupt_data[2][32]; 134 static int interrupt_data_len[2]; 135 static int int_data_last; 136 static unsigned char *reply_ptr; 137 static int data_index; 138 static int data_len; 139 static volatile int adb_int_pending; 140 static volatile int disable_poll; 141 static struct device_node *vias; 142 static int pmu_kind = PMU_UNKNOWN; 143 static int pmu_fully_inited = 0; 144 static int pmu_has_adb; 145 static struct device_node *gpio_node; 146 static unsigned char __iomem *gpio_reg = NULL; 147 static int gpio_irq = NO_IRQ; 148 static int gpio_irq_enabled = -1; 149 static volatile int pmu_suspended = 0; 150 static spinlock_t pmu_lock; 151 static u8 pmu_intr_mask; 152 static int pmu_version; 153 static int drop_interrupts; 154 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 155 static int option_lid_wakeup = 1; 156 #endif /* CONFIG_PM && CONFIG_PPC32 */ 157 #if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT_LEGACY) 158 static int sleep_in_progress; 159 #endif 160 static unsigned long async_req_locks; 161 static unsigned int pmu_irq_stats[11]; 162 163 static struct proc_dir_entry *proc_pmu_root; 164 static struct proc_dir_entry *proc_pmu_info; 165 static struct proc_dir_entry *proc_pmu_irqstats; 166 static struct proc_dir_entry *proc_pmu_options; 167 static int option_server_mode; 168 169 int pmu_battery_count; 170 int pmu_cur_battery; 171 unsigned int pmu_power_flags; 172 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES]; 173 static int query_batt_timer = BATTERY_POLLING_COUNT; 174 static struct adb_request batt_req; 175 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES]; 176 177 int __fake_sleep; 178 int asleep; 179 BLOCKING_NOTIFIER_HEAD(sleep_notifier_list); 180 181 #ifdef CONFIG_ADB 182 static int adb_dev_map = 0; 183 static int pmu_adb_flags; 184 185 static int pmu_probe(void); 186 static int pmu_init(void); 187 static int pmu_send_request(struct adb_request *req, int sync); 188 static int pmu_adb_autopoll(int devs); 189 static int pmu_adb_reset_bus(void); 190 #endif /* CONFIG_ADB */ 191 192 static int init_pmu(void); 193 static void pmu_start(void); 194 static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs); 195 static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs); 196 static int proc_get_info(char *page, char **start, off_t off, 197 int count, int *eof, void *data); 198 static int proc_get_irqstats(char *page, char **start, off_t off, 199 int count, int *eof, void *data); 200 static void pmu_pass_intr(unsigned char *data, int len); 201 static int proc_get_batt(char *page, char **start, off_t off, 202 int count, int *eof, void *data); 203 static int proc_read_options(char *page, char **start, off_t off, 204 int count, int *eof, void *data); 205 static int proc_write_options(struct file *file, const char __user *buffer, 206 unsigned long count, void *data); 207 208 #ifdef CONFIG_ADB 209 struct adb_driver via_pmu_driver = { 210 "PMU", 211 pmu_probe, 212 pmu_init, 213 pmu_send_request, 214 pmu_adb_autopoll, 215 pmu_poll_adb, 216 pmu_adb_reset_bus 217 }; 218 #endif /* CONFIG_ADB */ 219 220 extern void low_sleep_handler(void); 221 extern void enable_kernel_altivec(void); 222 extern void enable_kernel_fp(void); 223 224 #ifdef DEBUG_SLEEP 225 int pmu_polled_request(struct adb_request *req); 226 int pmu_wink(struct adb_request *req); 227 #endif 228 229 /* 230 * This table indicates for each PMU opcode: 231 * - the number of data bytes to be sent with the command, or -1 232 * if a length byte should be sent, 233 * - the number of response bytes which the PMU will return, or 234 * -1 if it will send a length byte. 235 */ 236 static const s8 pmu_data_len[256][2] = { 237 /* 0 1 2 3 4 5 6 7 */ 238 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 239 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 240 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 241 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0}, 242 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0}, 243 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1}, 244 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 245 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0}, 246 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 247 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1}, 248 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0}, 249 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1}, 250 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 251 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1}, 252 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 253 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1}, 254 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 255 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 256 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 257 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 258 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0}, 259 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 260 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 261 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 262 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 263 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 264 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 265 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1}, 266 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0}, 267 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0}, 268 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 269 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 270 }; 271 272 static char *pbook_type[] = { 273 "Unknown PowerBook", 274 "PowerBook 2400/3400/3500(G3)", 275 "PowerBook G3 Series", 276 "1999 PowerBook G3", 277 "Core99" 278 }; 279 280 int __init find_via_pmu(void) 281 { 282 u64 taddr; 283 u32 *reg; 284 285 if (via != 0) 286 return 1; 287 vias = of_find_node_by_name(NULL, "via-pmu"); 288 if (vias == NULL) 289 return 0; 290 291 reg = (u32 *)get_property(vias, "reg", NULL); 292 if (reg == NULL) { 293 printk(KERN_ERR "via-pmu: No \"reg\" property !\n"); 294 goto fail; 295 } 296 taddr = of_translate_address(vias, reg); 297 if (taddr == OF_BAD_ADDR) { 298 printk(KERN_ERR "via-pmu: Can't translate address !\n"); 299 goto fail; 300 } 301 302 spin_lock_init(&pmu_lock); 303 304 pmu_has_adb = 1; 305 306 pmu_intr_mask = PMU_INT_PCEJECT | 307 PMU_INT_SNDBRT | 308 PMU_INT_ADB | 309 PMU_INT_TICK; 310 311 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0) 312 || device_is_compatible(vias->parent, "ohare"))) 313 pmu_kind = PMU_OHARE_BASED; 314 else if (device_is_compatible(vias->parent, "paddington")) 315 pmu_kind = PMU_PADDINGTON_BASED; 316 else if (device_is_compatible(vias->parent, "heathrow")) 317 pmu_kind = PMU_HEATHROW_BASED; 318 else if (device_is_compatible(vias->parent, "Keylargo") 319 || device_is_compatible(vias->parent, "K2-Keylargo")) { 320 struct device_node *gpiop; 321 u64 gaddr = OF_BAD_ADDR; 322 323 pmu_kind = PMU_KEYLARGO_BASED; 324 pmu_has_adb = (find_type_devices("adb") != NULL); 325 pmu_intr_mask = PMU_INT_PCEJECT | 326 PMU_INT_SNDBRT | 327 PMU_INT_ADB | 328 PMU_INT_TICK | 329 PMU_INT_ENVIRONMENT; 330 331 gpiop = of_find_node_by_name(NULL, "gpio"); 332 if (gpiop) { 333 reg = (u32 *)get_property(gpiop, "reg", NULL); 334 if (reg) 335 gaddr = of_translate_address(gpiop, reg); 336 if (gaddr != OF_BAD_ADDR) 337 gpio_reg = ioremap(gaddr, 0x10); 338 } 339 if (gpio_reg == NULL) 340 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n"); 341 } else 342 pmu_kind = PMU_UNKNOWN; 343 344 via = ioremap(taddr, 0x2000); 345 if (via == NULL) { 346 printk(KERN_ERR "via-pmu: Can't map address !\n"); 347 goto fail; 348 } 349 350 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 351 out_8(&via[IFR], 0x7f); /* clear IFR */ 352 353 pmu_state = idle; 354 355 if (!init_pmu()) { 356 via = NULL; 357 return 0; 358 } 359 360 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n", 361 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version); 362 363 sys_ctrler = SYS_CTRLER_PMU; 364 365 return 1; 366 fail: 367 of_node_put(vias); 368 vias = NULL; 369 return 0; 370 } 371 372 #ifdef CONFIG_ADB 373 static int pmu_probe(void) 374 { 375 return vias == NULL? -ENODEV: 0; 376 } 377 378 static int __init pmu_init(void) 379 { 380 if (vias == NULL) 381 return -ENODEV; 382 return 0; 383 } 384 #endif /* CONFIG_ADB */ 385 386 /* 387 * We can't wait until pmu_init gets called, that happens too late. 388 * It happens after IDE and SCSI initialization, which can take a few 389 * seconds, and by that time the PMU could have given up on us and 390 * turned us off. 391 * Thus this is called with arch_initcall rather than device_initcall. 392 */ 393 static int __init via_pmu_start(void) 394 { 395 unsigned int irq; 396 397 if (vias == NULL) 398 return -ENODEV; 399 400 batt_req.complete = 1; 401 402 irq = irq_of_parse_and_map(vias, 0); 403 if (irq == NO_IRQ) { 404 printk(KERN_ERR "via-pmu: can't map interruptn"); 405 return -ENODEV; 406 } 407 if (request_irq(irq, via_pmu_interrupt, 0, "VIA-PMU", (void *)0)) { 408 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq); 409 return -ENODEV; 410 } 411 412 if (pmu_kind == PMU_KEYLARGO_BASED) { 413 gpio_node = of_find_node_by_name(NULL, "extint-gpio1"); 414 if (gpio_node == NULL) 415 gpio_node = of_find_node_by_name(NULL, 416 "pmu-interrupt"); 417 if (gpio_node) 418 gpio_irq = irq_of_parse_and_map(gpio_node, 0); 419 420 if (gpio_irq != NO_IRQ) { 421 if (request_irq(gpio_irq, gpio1_interrupt, 0, 422 "GPIO1 ADB", (void *)0)) 423 printk(KERN_ERR "pmu: can't get irq %d" 424 " (GPIO1)\n", gpio_irq); 425 else 426 gpio_irq_enabled = 1; 427 } 428 } 429 430 /* Enable interrupts */ 431 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 432 433 pmu_fully_inited = 1; 434 435 /* Make sure PMU settle down before continuing. This is _very_ important 436 * since the IDE probe may shut interrupts down for quite a bit of time. If 437 * a PMU communication is pending while this happens, the PMU may timeout 438 * Not that on Core99 machines, the PMU keeps sending us environement 439 * messages, we should find a way to either fix IDE or make it call 440 * pmu_suspend() before masking interrupts. This can also happens while 441 * scolling with some fbdevs. 442 */ 443 do { 444 pmu_poll(); 445 } while (pmu_state != idle); 446 447 return 0; 448 } 449 450 arch_initcall(via_pmu_start); 451 452 /* 453 * This has to be done after pci_init, which is a subsys_initcall. 454 */ 455 static int __init via_pmu_dev_init(void) 456 { 457 if (vias == NULL) 458 return -ENODEV; 459 460 #ifdef CONFIG_PMAC_BACKLIGHT 461 /* Initialize backlight */ 462 pmu_backlight_init(); 463 #endif 464 465 #ifdef CONFIG_PPC32 466 if (machine_is_compatible("AAPL,3400/2400") || 467 machine_is_compatible("AAPL,3500")) { 468 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 469 NULL, PMAC_MB_INFO_MODEL, 0); 470 pmu_battery_count = 1; 471 if (mb == PMAC_TYPE_COMET) 472 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET; 473 else 474 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER; 475 } else if (machine_is_compatible("AAPL,PowerBook1998") || 476 machine_is_compatible("PowerBook1,1")) { 477 pmu_battery_count = 2; 478 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 479 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 480 } else { 481 struct device_node* prim = find_devices("power-mgt"); 482 u32 *prim_info = NULL; 483 if (prim) 484 prim_info = (u32 *)get_property(prim, "prim-info", NULL); 485 if (prim_info) { 486 /* Other stuffs here yet unknown */ 487 pmu_battery_count = (prim_info[6] >> 16) & 0xff; 488 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 489 if (pmu_battery_count > 1) 490 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 491 } 492 } 493 #endif /* CONFIG_PPC32 */ 494 495 /* Create /proc/pmu */ 496 proc_pmu_root = proc_mkdir("pmu", NULL); 497 if (proc_pmu_root) { 498 long i; 499 500 for (i=0; i<pmu_battery_count; i++) { 501 char title[16]; 502 sprintf(title, "battery_%ld", i); 503 proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root, 504 proc_get_batt, (void *)i); 505 } 506 507 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root, 508 proc_get_info, NULL); 509 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root, 510 proc_get_irqstats, NULL); 511 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root); 512 if (proc_pmu_options) { 513 proc_pmu_options->nlink = 1; 514 proc_pmu_options->read_proc = proc_read_options; 515 proc_pmu_options->write_proc = proc_write_options; 516 } 517 } 518 return 0; 519 } 520 521 device_initcall(via_pmu_dev_init); 522 523 static int 524 init_pmu(void) 525 { 526 int timeout; 527 struct adb_request req; 528 529 out_8(&via[B], via[B] | TREQ); /* negate TREQ */ 530 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */ 531 532 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 533 timeout = 100000; 534 while (!req.complete) { 535 if (--timeout < 0) { 536 printk(KERN_ERR "init_pmu: no response from PMU\n"); 537 return 0; 538 } 539 udelay(10); 540 pmu_poll(); 541 } 542 543 /* ack all pending interrupts */ 544 timeout = 100000; 545 interrupt_data[0][0] = 1; 546 while (interrupt_data[0][0] || pmu_state != idle) { 547 if (--timeout < 0) { 548 printk(KERN_ERR "init_pmu: timed out acking intrs\n"); 549 return 0; 550 } 551 if (pmu_state == idle) 552 adb_int_pending = 1; 553 via_pmu_interrupt(0, NULL, NULL); 554 udelay(10); 555 } 556 557 /* Tell PMU we are ready. */ 558 if (pmu_kind == PMU_KEYLARGO_BASED) { 559 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 560 while (!req.complete) 561 pmu_poll(); 562 } 563 564 /* Read PMU version */ 565 pmu_request(&req, NULL, 1, PMU_GET_VERSION); 566 pmu_wait_complete(&req); 567 if (req.reply_len > 0) 568 pmu_version = req.reply[0]; 569 570 /* Read server mode setting */ 571 if (pmu_kind == PMU_KEYLARGO_BASED) { 572 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, 573 PMU_PWR_GET_POWERUP_EVENTS); 574 pmu_wait_complete(&req); 575 if (req.reply_len == 2) { 576 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT) 577 option_server_mode = 1; 578 printk(KERN_INFO "via-pmu: Server Mode is %s\n", 579 option_server_mode ? "enabled" : "disabled"); 580 } 581 } 582 return 1; 583 } 584 585 int 586 pmu_get_model(void) 587 { 588 return pmu_kind; 589 } 590 591 static void pmu_set_server_mode(int server_mode) 592 { 593 struct adb_request req; 594 595 if (pmu_kind != PMU_KEYLARGO_BASED) 596 return; 597 598 option_server_mode = server_mode; 599 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS); 600 pmu_wait_complete(&req); 601 if (req.reply_len < 2) 602 return; 603 if (server_mode) 604 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 605 PMU_PWR_SET_POWERUP_EVENTS, 606 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 607 else 608 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 609 PMU_PWR_CLR_POWERUP_EVENTS, 610 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 611 pmu_wait_complete(&req); 612 } 613 614 /* This new version of the code for 2400/3400/3500 powerbooks 615 * is inspired from the implementation in gkrellm-pmu 616 */ 617 static void 618 done_battery_state_ohare(struct adb_request* req) 619 { 620 /* format: 621 * [0] : flags 622 * 0x01 : AC indicator 623 * 0x02 : charging 624 * 0x04 : battery exist 625 * 0x08 : 626 * 0x10 : 627 * 0x20 : full charged 628 * 0x40 : pcharge reset 629 * 0x80 : battery exist 630 * 631 * [1][2] : battery voltage 632 * [3] : CPU temperature 633 * [4] : battery temperature 634 * [5] : current 635 * [6][7] : pcharge 636 * --tkoba 637 */ 638 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER; 639 long pcharge, charge, vb, vmax, lmax; 640 long vmax_charging, vmax_charged; 641 long amperage, voltage, time, max; 642 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 643 NULL, PMAC_MB_INFO_MODEL, 0); 644 645 if (req->reply[0] & 0x01) 646 pmu_power_flags |= PMU_PWR_AC_PRESENT; 647 else 648 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 649 650 if (mb == PMAC_TYPE_COMET) { 651 vmax_charged = 189; 652 vmax_charging = 213; 653 lmax = 6500; 654 } else { 655 vmax_charged = 330; 656 vmax_charging = 330; 657 lmax = 6500; 658 } 659 vmax = vmax_charged; 660 661 /* If battery installed */ 662 if (req->reply[0] & 0x04) { 663 bat_flags |= PMU_BATT_PRESENT; 664 if (req->reply[0] & 0x02) 665 bat_flags |= PMU_BATT_CHARGING; 666 vb = (req->reply[1] << 8) | req->reply[2]; 667 voltage = (vb * 265 + 72665) / 10; 668 amperage = req->reply[5]; 669 if ((req->reply[0] & 0x01) == 0) { 670 if (amperage > 200) 671 vb += ((amperage - 200) * 15)/100; 672 } else if (req->reply[0] & 0x02) { 673 vb = (vb * 97) / 100; 674 vmax = vmax_charging; 675 } 676 charge = (100 * vb) / vmax; 677 if (req->reply[0] & 0x40) { 678 pcharge = (req->reply[6] << 8) + req->reply[7]; 679 if (pcharge > lmax) 680 pcharge = lmax; 681 pcharge *= 100; 682 pcharge = 100 - pcharge / lmax; 683 if (pcharge < charge) 684 charge = pcharge; 685 } 686 if (amperage > 0) 687 time = (charge * 16440) / amperage; 688 else 689 time = 0; 690 max = 100; 691 amperage = -amperage; 692 } else 693 charge = max = amperage = voltage = time = 0; 694 695 pmu_batteries[pmu_cur_battery].flags = bat_flags; 696 pmu_batteries[pmu_cur_battery].charge = charge; 697 pmu_batteries[pmu_cur_battery].max_charge = max; 698 pmu_batteries[pmu_cur_battery].amperage = amperage; 699 pmu_batteries[pmu_cur_battery].voltage = voltage; 700 pmu_batteries[pmu_cur_battery].time_remaining = time; 701 702 clear_bit(0, &async_req_locks); 703 } 704 705 static void 706 done_battery_state_smart(struct adb_request* req) 707 { 708 /* format: 709 * [0] : format of this structure (known: 3,4,5) 710 * [1] : flags 711 * 712 * format 3 & 4: 713 * 714 * [2] : charge 715 * [3] : max charge 716 * [4] : current 717 * [5] : voltage 718 * 719 * format 5: 720 * 721 * [2][3] : charge 722 * [4][5] : max charge 723 * [6][7] : current 724 * [8][9] : voltage 725 */ 726 727 unsigned int bat_flags = PMU_BATT_TYPE_SMART; 728 int amperage; 729 unsigned int capa, max, voltage; 730 731 if (req->reply[1] & 0x01) 732 pmu_power_flags |= PMU_PWR_AC_PRESENT; 733 else 734 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 735 736 737 capa = max = amperage = voltage = 0; 738 739 if (req->reply[1] & 0x04) { 740 bat_flags |= PMU_BATT_PRESENT; 741 switch(req->reply[0]) { 742 case 3: 743 case 4: capa = req->reply[2]; 744 max = req->reply[3]; 745 amperage = *((signed char *)&req->reply[4]); 746 voltage = req->reply[5]; 747 break; 748 case 5: capa = (req->reply[2] << 8) | req->reply[3]; 749 max = (req->reply[4] << 8) | req->reply[5]; 750 amperage = *((signed short *)&req->reply[6]); 751 voltage = (req->reply[8] << 8) | req->reply[9]; 752 break; 753 default: 754 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n", 755 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]); 756 break; 757 } 758 } 759 760 if ((req->reply[1] & 0x01) && (amperage > 0)) 761 bat_flags |= PMU_BATT_CHARGING; 762 763 pmu_batteries[pmu_cur_battery].flags = bat_flags; 764 pmu_batteries[pmu_cur_battery].charge = capa; 765 pmu_batteries[pmu_cur_battery].max_charge = max; 766 pmu_batteries[pmu_cur_battery].amperage = amperage; 767 pmu_batteries[pmu_cur_battery].voltage = voltage; 768 if (amperage) { 769 if ((req->reply[1] & 0x01) && (amperage > 0)) 770 pmu_batteries[pmu_cur_battery].time_remaining 771 = ((max-capa) * 3600) / amperage; 772 else 773 pmu_batteries[pmu_cur_battery].time_remaining 774 = (capa * 3600) / (-amperage); 775 } else 776 pmu_batteries[pmu_cur_battery].time_remaining = 0; 777 778 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count; 779 780 clear_bit(0, &async_req_locks); 781 } 782 783 static void 784 query_battery_state(void) 785 { 786 if (test_and_set_bit(0, &async_req_locks)) 787 return; 788 if (pmu_kind == PMU_OHARE_BASED) 789 pmu_request(&batt_req, done_battery_state_ohare, 790 1, PMU_BATTERY_STATE); 791 else 792 pmu_request(&batt_req, done_battery_state_smart, 793 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1); 794 } 795 796 static int 797 proc_get_info(char *page, char **start, off_t off, 798 int count, int *eof, void *data) 799 { 800 char* p = page; 801 802 p += sprintf(p, "PMU driver version : %d\n", PMU_DRIVER_VERSION); 803 p += sprintf(p, "PMU firmware version : %02x\n", pmu_version); 804 p += sprintf(p, "AC Power : %d\n", 805 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0); 806 p += sprintf(p, "Battery count : %d\n", pmu_battery_count); 807 808 return p - page; 809 } 810 811 static int 812 proc_get_irqstats(char *page, char **start, off_t off, 813 int count, int *eof, void *data) 814 { 815 int i; 816 char* p = page; 817 static const char *irq_names[] = { 818 "Total CB1 triggered events", 819 "Total GPIO1 triggered events", 820 "PC-Card eject button", 821 "Sound/Brightness button", 822 "ADB message", 823 "Battery state change", 824 "Environment interrupt", 825 "Tick timer", 826 "Ghost interrupt (zero len)", 827 "Empty interrupt (empty mask)", 828 "Max irqs in a row" 829 }; 830 831 for (i=0; i<11; i++) { 832 p += sprintf(p, " %2u: %10u (%s)\n", 833 i, pmu_irq_stats[i], irq_names[i]); 834 } 835 return p - page; 836 } 837 838 static int 839 proc_get_batt(char *page, char **start, off_t off, 840 int count, int *eof, void *data) 841 { 842 long batnum = (long)data; 843 char *p = page; 844 845 p += sprintf(p, "\n"); 846 p += sprintf(p, "flags : %08x\n", 847 pmu_batteries[batnum].flags); 848 p += sprintf(p, "charge : %d\n", 849 pmu_batteries[batnum].charge); 850 p += sprintf(p, "max_charge : %d\n", 851 pmu_batteries[batnum].max_charge); 852 p += sprintf(p, "current : %d\n", 853 pmu_batteries[batnum].amperage); 854 p += sprintf(p, "voltage : %d\n", 855 pmu_batteries[batnum].voltage); 856 p += sprintf(p, "time rem. : %d\n", 857 pmu_batteries[batnum].time_remaining); 858 859 return p - page; 860 } 861 862 static int 863 proc_read_options(char *page, char **start, off_t off, 864 int count, int *eof, void *data) 865 { 866 char *p = page; 867 868 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 869 if (pmu_kind == PMU_KEYLARGO_BASED && 870 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 871 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup); 872 #endif 873 if (pmu_kind == PMU_KEYLARGO_BASED) 874 p += sprintf(p, "server_mode=%d\n", option_server_mode); 875 876 return p - page; 877 } 878 879 static int 880 proc_write_options(struct file *file, const char __user *buffer, 881 unsigned long count, void *data) 882 { 883 char tmp[33]; 884 char *label, *val; 885 unsigned long fcount = count; 886 887 if (!count) 888 return -EINVAL; 889 if (count > 32) 890 count = 32; 891 if (copy_from_user(tmp, buffer, count)) 892 return -EFAULT; 893 tmp[count] = 0; 894 895 label = tmp; 896 while(*label == ' ') 897 label++; 898 val = label; 899 while(*val && (*val != '=')) { 900 if (*val == ' ') 901 *val = 0; 902 val++; 903 } 904 if ((*val) == 0) 905 return -EINVAL; 906 *(val++) = 0; 907 while(*val == ' ') 908 val++; 909 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 910 if (pmu_kind == PMU_KEYLARGO_BASED && 911 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 912 if (!strcmp(label, "lid_wakeup")) 913 option_lid_wakeup = ((*val) == '1'); 914 #endif 915 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) { 916 int new_value; 917 new_value = ((*val) == '1'); 918 if (new_value != option_server_mode) 919 pmu_set_server_mode(new_value); 920 } 921 return fcount; 922 } 923 924 #ifdef CONFIG_ADB 925 /* Send an ADB command */ 926 static int 927 pmu_send_request(struct adb_request *req, int sync) 928 { 929 int i, ret; 930 931 if ((vias == NULL) || (!pmu_fully_inited)) { 932 req->complete = 1; 933 return -ENXIO; 934 } 935 936 ret = -EINVAL; 937 938 switch (req->data[0]) { 939 case PMU_PACKET: 940 for (i = 0; i < req->nbytes - 1; ++i) 941 req->data[i] = req->data[i+1]; 942 --req->nbytes; 943 if (pmu_data_len[req->data[0]][1] != 0) { 944 req->reply[0] = ADB_RET_OK; 945 req->reply_len = 1; 946 } else 947 req->reply_len = 0; 948 ret = pmu_queue_request(req); 949 break; 950 case CUDA_PACKET: 951 switch (req->data[1]) { 952 case CUDA_GET_TIME: 953 if (req->nbytes != 2) 954 break; 955 req->data[0] = PMU_READ_RTC; 956 req->nbytes = 1; 957 req->reply_len = 3; 958 req->reply[0] = CUDA_PACKET; 959 req->reply[1] = 0; 960 req->reply[2] = CUDA_GET_TIME; 961 ret = pmu_queue_request(req); 962 break; 963 case CUDA_SET_TIME: 964 if (req->nbytes != 6) 965 break; 966 req->data[0] = PMU_SET_RTC; 967 req->nbytes = 5; 968 for (i = 1; i <= 4; ++i) 969 req->data[i] = req->data[i+1]; 970 req->reply_len = 3; 971 req->reply[0] = CUDA_PACKET; 972 req->reply[1] = 0; 973 req->reply[2] = CUDA_SET_TIME; 974 ret = pmu_queue_request(req); 975 break; 976 } 977 break; 978 case ADB_PACKET: 979 if (!pmu_has_adb) 980 return -ENXIO; 981 for (i = req->nbytes - 1; i > 1; --i) 982 req->data[i+2] = req->data[i]; 983 req->data[3] = req->nbytes - 2; 984 req->data[2] = pmu_adb_flags; 985 /*req->data[1] = req->data[1];*/ 986 req->data[0] = PMU_ADB_CMD; 987 req->nbytes += 2; 988 req->reply_expected = 1; 989 req->reply_len = 0; 990 ret = pmu_queue_request(req); 991 break; 992 } 993 if (ret) { 994 req->complete = 1; 995 return ret; 996 } 997 998 if (sync) 999 while (!req->complete) 1000 pmu_poll(); 1001 1002 return 0; 1003 } 1004 1005 /* Enable/disable autopolling */ 1006 static int 1007 pmu_adb_autopoll(int devs) 1008 { 1009 struct adb_request req; 1010 1011 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1012 return -ENXIO; 1013 1014 if (devs) { 1015 adb_dev_map = devs; 1016 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86, 1017 adb_dev_map >> 8, adb_dev_map); 1018 pmu_adb_flags = 2; 1019 } else { 1020 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF); 1021 pmu_adb_flags = 0; 1022 } 1023 while (!req.complete) 1024 pmu_poll(); 1025 return 0; 1026 } 1027 1028 /* Reset the ADB bus */ 1029 static int 1030 pmu_adb_reset_bus(void) 1031 { 1032 struct adb_request req; 1033 int save_autopoll = adb_dev_map; 1034 1035 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1036 return -ENXIO; 1037 1038 /* anyone got a better idea?? */ 1039 pmu_adb_autopoll(0); 1040 1041 req.nbytes = 5; 1042 req.done = NULL; 1043 req.data[0] = PMU_ADB_CMD; 1044 req.data[1] = 0; 1045 req.data[2] = ADB_BUSRESET; 1046 req.data[3] = 0; 1047 req.data[4] = 0; 1048 req.reply_len = 0; 1049 req.reply_expected = 1; 1050 if (pmu_queue_request(&req) != 0) { 1051 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n"); 1052 return -EIO; 1053 } 1054 pmu_wait_complete(&req); 1055 1056 if (save_autopoll != 0) 1057 pmu_adb_autopoll(save_autopoll); 1058 1059 return 0; 1060 } 1061 #endif /* CONFIG_ADB */ 1062 1063 /* Construct and send a pmu request */ 1064 int 1065 pmu_request(struct adb_request *req, void (*done)(struct adb_request *), 1066 int nbytes, ...) 1067 { 1068 va_list list; 1069 int i; 1070 1071 if (vias == NULL) 1072 return -ENXIO; 1073 1074 if (nbytes < 0 || nbytes > 32) { 1075 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes); 1076 req->complete = 1; 1077 return -EINVAL; 1078 } 1079 req->nbytes = nbytes; 1080 req->done = done; 1081 va_start(list, nbytes); 1082 for (i = 0; i < nbytes; ++i) 1083 req->data[i] = va_arg(list, int); 1084 va_end(list); 1085 req->reply_len = 0; 1086 req->reply_expected = 0; 1087 return pmu_queue_request(req); 1088 } 1089 1090 int 1091 pmu_queue_request(struct adb_request *req) 1092 { 1093 unsigned long flags; 1094 int nsend; 1095 1096 if (via == NULL) { 1097 req->complete = 1; 1098 return -ENXIO; 1099 } 1100 if (req->nbytes <= 0) { 1101 req->complete = 1; 1102 return 0; 1103 } 1104 nsend = pmu_data_len[req->data[0]][0]; 1105 if (nsend >= 0 && req->nbytes != nsend + 1) { 1106 req->complete = 1; 1107 return -EINVAL; 1108 } 1109 1110 req->next = NULL; 1111 req->sent = 0; 1112 req->complete = 0; 1113 1114 spin_lock_irqsave(&pmu_lock, flags); 1115 if (current_req != 0) { 1116 last_req->next = req; 1117 last_req = req; 1118 } else { 1119 current_req = req; 1120 last_req = req; 1121 if (pmu_state == idle) 1122 pmu_start(); 1123 } 1124 spin_unlock_irqrestore(&pmu_lock, flags); 1125 1126 return 0; 1127 } 1128 1129 static inline void 1130 wait_for_ack(void) 1131 { 1132 /* Sightly increased the delay, I had one occurrence of the message 1133 * reported 1134 */ 1135 int timeout = 4000; 1136 while ((in_8(&via[B]) & TACK) == 0) { 1137 if (--timeout < 0) { 1138 printk(KERN_ERR "PMU not responding (!ack)\n"); 1139 return; 1140 } 1141 udelay(10); 1142 } 1143 } 1144 1145 /* New PMU seems to be very sensitive to those timings, so we make sure 1146 * PCI is flushed immediately */ 1147 static inline void 1148 send_byte(int x) 1149 { 1150 volatile unsigned char __iomem *v = via; 1151 1152 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT); 1153 out_8(&v[SR], x); 1154 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */ 1155 (void)in_8(&v[B]); 1156 } 1157 1158 static inline void 1159 recv_byte(void) 1160 { 1161 volatile unsigned char __iomem *v = via; 1162 1163 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT); 1164 in_8(&v[SR]); /* resets SR */ 1165 out_8(&v[B], in_8(&v[B]) & ~TREQ); 1166 (void)in_8(&v[B]); 1167 } 1168 1169 static inline void 1170 pmu_done(struct adb_request *req) 1171 { 1172 void (*done)(struct adb_request *) = req->done; 1173 mb(); 1174 req->complete = 1; 1175 /* Here, we assume that if the request has a done member, the 1176 * struct request will survive to setting req->complete to 1 1177 */ 1178 if (done) 1179 (*done)(req); 1180 } 1181 1182 static void 1183 pmu_start(void) 1184 { 1185 struct adb_request *req; 1186 1187 /* assert pmu_state == idle */ 1188 /* get the packet to send */ 1189 req = current_req; 1190 if (req == 0 || pmu_state != idle 1191 || (/*req->reply_expected && */req_awaiting_reply)) 1192 return; 1193 1194 pmu_state = sending; 1195 data_index = 1; 1196 data_len = pmu_data_len[req->data[0]][0]; 1197 1198 /* Sounds safer to make sure ACK is high before writing. This helped 1199 * kill a problem with ADB and some iBooks 1200 */ 1201 wait_for_ack(); 1202 /* set the shift register to shift out and send a byte */ 1203 send_byte(req->data[0]); 1204 } 1205 1206 void 1207 pmu_poll(void) 1208 { 1209 if (!via) 1210 return; 1211 if (disable_poll) 1212 return; 1213 via_pmu_interrupt(0, NULL, NULL); 1214 } 1215 1216 void 1217 pmu_poll_adb(void) 1218 { 1219 if (!via) 1220 return; 1221 if (disable_poll) 1222 return; 1223 /* Kicks ADB read when PMU is suspended */ 1224 adb_int_pending = 1; 1225 do { 1226 via_pmu_interrupt(0, NULL, NULL); 1227 } while (pmu_suspended && (adb_int_pending || pmu_state != idle 1228 || req_awaiting_reply)); 1229 } 1230 1231 void 1232 pmu_wait_complete(struct adb_request *req) 1233 { 1234 if (!via) 1235 return; 1236 while((pmu_state != idle && pmu_state != locked) || !req->complete) 1237 via_pmu_interrupt(0, NULL, NULL); 1238 } 1239 1240 /* This function loops until the PMU is idle and prevents it from 1241 * anwsering to ADB interrupts. pmu_request can still be called. 1242 * This is done to avoid spurrious shutdowns when we know we'll have 1243 * interrupts switched off for a long time 1244 */ 1245 void 1246 pmu_suspend(void) 1247 { 1248 unsigned long flags; 1249 #ifdef SUSPEND_USES_PMU 1250 struct adb_request *req; 1251 #endif 1252 if (!via) 1253 return; 1254 1255 spin_lock_irqsave(&pmu_lock, flags); 1256 pmu_suspended++; 1257 if (pmu_suspended > 1) { 1258 spin_unlock_irqrestore(&pmu_lock, flags); 1259 return; 1260 } 1261 1262 do { 1263 spin_unlock_irqrestore(&pmu_lock, flags); 1264 if (req_awaiting_reply) 1265 adb_int_pending = 1; 1266 via_pmu_interrupt(0, NULL, NULL); 1267 spin_lock_irqsave(&pmu_lock, flags); 1268 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) { 1269 #ifdef SUSPEND_USES_PMU 1270 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 1271 spin_unlock_irqrestore(&pmu_lock, flags); 1272 while(!req.complete) 1273 pmu_poll(); 1274 #else /* SUSPEND_USES_PMU */ 1275 if (gpio_irq >= 0) 1276 disable_irq_nosync(gpio_irq); 1277 out_8(&via[IER], CB1_INT | IER_CLR); 1278 spin_unlock_irqrestore(&pmu_lock, flags); 1279 #endif /* SUSPEND_USES_PMU */ 1280 break; 1281 } 1282 } while (1); 1283 } 1284 1285 void 1286 pmu_resume(void) 1287 { 1288 unsigned long flags; 1289 1290 if (!via || (pmu_suspended < 1)) 1291 return; 1292 1293 spin_lock_irqsave(&pmu_lock, flags); 1294 pmu_suspended--; 1295 if (pmu_suspended > 0) { 1296 spin_unlock_irqrestore(&pmu_lock, flags); 1297 return; 1298 } 1299 adb_int_pending = 1; 1300 #ifdef SUSPEND_USES_PMU 1301 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1302 spin_unlock_irqrestore(&pmu_lock, flags); 1303 while(!req.complete) 1304 pmu_poll(); 1305 #else /* SUSPEND_USES_PMU */ 1306 if (gpio_irq >= 0) 1307 enable_irq(gpio_irq); 1308 out_8(&via[IER], CB1_INT | IER_SET); 1309 spin_unlock_irqrestore(&pmu_lock, flags); 1310 pmu_poll(); 1311 #endif /* SUSPEND_USES_PMU */ 1312 } 1313 1314 /* Interrupt data could be the result data from an ADB cmd */ 1315 static void 1316 pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs) 1317 { 1318 unsigned char ints, pirq; 1319 int i = 0; 1320 1321 asleep = 0; 1322 if (drop_interrupts || len < 1) { 1323 adb_int_pending = 0; 1324 pmu_irq_stats[8]++; 1325 return; 1326 } 1327 1328 /* Get PMU interrupt mask */ 1329 ints = data[0]; 1330 1331 /* Record zero interrupts for stats */ 1332 if (ints == 0) 1333 pmu_irq_stats[9]++; 1334 1335 /* Hack to deal with ADB autopoll flag */ 1336 if (ints & PMU_INT_ADB) 1337 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL); 1338 1339 next: 1340 1341 if (ints == 0) { 1342 if (i > pmu_irq_stats[10]) 1343 pmu_irq_stats[10] = i; 1344 return; 1345 } 1346 1347 for (pirq = 0; pirq < 8; pirq++) 1348 if (ints & (1 << pirq)) 1349 break; 1350 pmu_irq_stats[pirq]++; 1351 i++; 1352 ints &= ~(1 << pirq); 1353 1354 /* Note: for some reason, we get an interrupt with len=1, 1355 * data[0]==0 after each normal ADB interrupt, at least 1356 * on the Pismo. Still investigating... --BenH 1357 */ 1358 if ((1 << pirq) & PMU_INT_ADB) { 1359 if ((data[0] & PMU_INT_ADB_AUTO) == 0) { 1360 struct adb_request *req = req_awaiting_reply; 1361 if (req == 0) { 1362 printk(KERN_ERR "PMU: extra ADB reply\n"); 1363 return; 1364 } 1365 req_awaiting_reply = NULL; 1366 if (len <= 2) 1367 req->reply_len = 0; 1368 else { 1369 memcpy(req->reply, data + 1, len - 1); 1370 req->reply_len = len - 1; 1371 } 1372 pmu_done(req); 1373 } else { 1374 if (len == 4 && data[1] == 0x2c) { 1375 extern int xmon_wants_key, xmon_adb_keycode; 1376 if (xmon_wants_key) { 1377 xmon_adb_keycode = data[2]; 1378 return; 1379 } 1380 } 1381 #ifdef CONFIG_ADB 1382 /* 1383 * XXX On the [23]400 the PMU gives us an up 1384 * event for keycodes 0x74 or 0x75 when the PC 1385 * card eject buttons are released, so we 1386 * ignore those events. 1387 */ 1388 if (!(pmu_kind == PMU_OHARE_BASED && len == 4 1389 && data[1] == 0x2c && data[3] == 0xff 1390 && (data[2] & ~1) == 0xf4)) 1391 adb_input(data+1, len-1, regs, 1); 1392 #endif /* CONFIG_ADB */ 1393 } 1394 } 1395 /* Sound/brightness button pressed */ 1396 else if ((1 << pirq) & PMU_INT_SNDBRT) { 1397 #ifdef CONFIG_PMAC_BACKLIGHT 1398 if (len == 3) 1399 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4); 1400 #endif 1401 } 1402 /* Tick interrupt */ 1403 else if ((1 << pirq) & PMU_INT_TICK) { 1404 /* Environement or tick interrupt, query batteries */ 1405 if (pmu_battery_count) { 1406 if ((--query_batt_timer) == 0) { 1407 query_battery_state(); 1408 query_batt_timer = BATTERY_POLLING_COUNT; 1409 } 1410 } 1411 } 1412 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) { 1413 if (pmu_battery_count) 1414 query_battery_state(); 1415 pmu_pass_intr(data, len); 1416 /* len == 6 is probably a bad check. But how do I 1417 * know what PMU versions send what events here? */ 1418 if (len == 6) { 1419 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8)); 1420 via_pmu_event(PMU_EVT_LID, data[1]&1); 1421 } 1422 } else { 1423 pmu_pass_intr(data, len); 1424 } 1425 goto next; 1426 } 1427 1428 static struct adb_request* 1429 pmu_sr_intr(struct pt_regs *regs) 1430 { 1431 struct adb_request *req; 1432 int bite = 0; 1433 1434 if (via[B] & TREQ) { 1435 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]); 1436 out_8(&via[IFR], SR_INT); 1437 return NULL; 1438 } 1439 /* The ack may not yet be low when we get the interrupt */ 1440 while ((in_8(&via[B]) & TACK) != 0) 1441 ; 1442 1443 /* if reading grab the byte, and reset the interrupt */ 1444 if (pmu_state == reading || pmu_state == reading_intr) 1445 bite = in_8(&via[SR]); 1446 1447 /* reset TREQ and wait for TACK to go high */ 1448 out_8(&via[B], in_8(&via[B]) | TREQ); 1449 wait_for_ack(); 1450 1451 switch (pmu_state) { 1452 case sending: 1453 req = current_req; 1454 if (data_len < 0) { 1455 data_len = req->nbytes - 1; 1456 send_byte(data_len); 1457 break; 1458 } 1459 if (data_index <= data_len) { 1460 send_byte(req->data[data_index++]); 1461 break; 1462 } 1463 req->sent = 1; 1464 data_len = pmu_data_len[req->data[0]][1]; 1465 if (data_len == 0) { 1466 pmu_state = idle; 1467 current_req = req->next; 1468 if (req->reply_expected) 1469 req_awaiting_reply = req; 1470 else 1471 return req; 1472 } else { 1473 pmu_state = reading; 1474 data_index = 0; 1475 reply_ptr = req->reply + req->reply_len; 1476 recv_byte(); 1477 } 1478 break; 1479 1480 case intack: 1481 data_index = 0; 1482 data_len = -1; 1483 pmu_state = reading_intr; 1484 reply_ptr = interrupt_data[int_data_last]; 1485 recv_byte(); 1486 if (gpio_irq >= 0 && !gpio_irq_enabled) { 1487 enable_irq(gpio_irq); 1488 gpio_irq_enabled = 1; 1489 } 1490 break; 1491 1492 case reading: 1493 case reading_intr: 1494 if (data_len == -1) { 1495 data_len = bite; 1496 if (bite > 32) 1497 printk(KERN_ERR "PMU: bad reply len %d\n", bite); 1498 } else if (data_index < 32) { 1499 reply_ptr[data_index++] = bite; 1500 } 1501 if (data_index < data_len) { 1502 recv_byte(); 1503 break; 1504 } 1505 1506 if (pmu_state == reading_intr) { 1507 pmu_state = idle; 1508 int_data_state[int_data_last] = int_data_ready; 1509 interrupt_data_len[int_data_last] = data_len; 1510 } else { 1511 req = current_req; 1512 /* 1513 * For PMU sleep and freq change requests, we lock the 1514 * PMU until it's explicitely unlocked. This avoids any 1515 * spurrious event polling getting in 1516 */ 1517 current_req = req->next; 1518 req->reply_len += data_index; 1519 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED) 1520 pmu_state = locked; 1521 else 1522 pmu_state = idle; 1523 return req; 1524 } 1525 break; 1526 1527 default: 1528 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n", 1529 pmu_state); 1530 } 1531 return NULL; 1532 } 1533 1534 static irqreturn_t 1535 via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs) 1536 { 1537 unsigned long flags; 1538 int intr; 1539 int nloop = 0; 1540 int int_data = -1; 1541 struct adb_request *req = NULL; 1542 int handled = 0; 1543 1544 /* This is a bit brutal, we can probably do better */ 1545 spin_lock_irqsave(&pmu_lock, flags); 1546 ++disable_poll; 1547 1548 for (;;) { 1549 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT); 1550 if (intr == 0) 1551 break; 1552 handled = 1; 1553 if (++nloop > 1000) { 1554 printk(KERN_DEBUG "PMU: stuck in intr loop, " 1555 "intr=%x, ier=%x pmu_state=%d\n", 1556 intr, in_8(&via[IER]), pmu_state); 1557 break; 1558 } 1559 out_8(&via[IFR], intr); 1560 if (intr & CB1_INT) { 1561 adb_int_pending = 1; 1562 pmu_irq_stats[0]++; 1563 } 1564 if (intr & SR_INT) { 1565 req = pmu_sr_intr(regs); 1566 if (req) 1567 break; 1568 } 1569 } 1570 1571 recheck: 1572 if (pmu_state == idle) { 1573 if (adb_int_pending) { 1574 if (int_data_state[0] == int_data_empty) 1575 int_data_last = 0; 1576 else if (int_data_state[1] == int_data_empty) 1577 int_data_last = 1; 1578 else 1579 goto no_free_slot; 1580 pmu_state = intack; 1581 int_data_state[int_data_last] = int_data_fill; 1582 /* Sounds safer to make sure ACK is high before writing. 1583 * This helped kill a problem with ADB and some iBooks 1584 */ 1585 wait_for_ack(); 1586 send_byte(PMU_INT_ACK); 1587 adb_int_pending = 0; 1588 } else if (current_req) 1589 pmu_start(); 1590 } 1591 no_free_slot: 1592 /* Mark the oldest buffer for flushing */ 1593 if (int_data_state[!int_data_last] == int_data_ready) { 1594 int_data_state[!int_data_last] = int_data_flush; 1595 int_data = !int_data_last; 1596 } else if (int_data_state[int_data_last] == int_data_ready) { 1597 int_data_state[int_data_last] = int_data_flush; 1598 int_data = int_data_last; 1599 } 1600 --disable_poll; 1601 spin_unlock_irqrestore(&pmu_lock, flags); 1602 1603 /* Deal with completed PMU requests outside of the lock */ 1604 if (req) { 1605 pmu_done(req); 1606 req = NULL; 1607 } 1608 1609 /* Deal with interrupt datas outside of the lock */ 1610 if (int_data >= 0) { 1611 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs); 1612 spin_lock_irqsave(&pmu_lock, flags); 1613 ++disable_poll; 1614 int_data_state[int_data] = int_data_empty; 1615 int_data = -1; 1616 goto recheck; 1617 } 1618 1619 return IRQ_RETVAL(handled); 1620 } 1621 1622 void 1623 pmu_unlock(void) 1624 { 1625 unsigned long flags; 1626 1627 spin_lock_irqsave(&pmu_lock, flags); 1628 if (pmu_state == locked) 1629 pmu_state = idle; 1630 adb_int_pending = 1; 1631 spin_unlock_irqrestore(&pmu_lock, flags); 1632 } 1633 1634 1635 static irqreturn_t 1636 gpio1_interrupt(int irq, void *arg, struct pt_regs *regs) 1637 { 1638 unsigned long flags; 1639 1640 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) { 1641 spin_lock_irqsave(&pmu_lock, flags); 1642 if (gpio_irq_enabled > 0) { 1643 disable_irq_nosync(gpio_irq); 1644 gpio_irq_enabled = 0; 1645 } 1646 pmu_irq_stats[1]++; 1647 adb_int_pending = 1; 1648 spin_unlock_irqrestore(&pmu_lock, flags); 1649 via_pmu_interrupt(0, NULL, NULL); 1650 return IRQ_HANDLED; 1651 } 1652 return IRQ_NONE; 1653 } 1654 1655 void 1656 pmu_enable_irled(int on) 1657 { 1658 struct adb_request req; 1659 1660 if (vias == NULL) 1661 return ; 1662 if (pmu_kind == PMU_KEYLARGO_BASED) 1663 return ; 1664 1665 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED | 1666 (on ? PMU_POW_ON : PMU_POW_OFF)); 1667 pmu_wait_complete(&req); 1668 } 1669 1670 void 1671 pmu_restart(void) 1672 { 1673 struct adb_request req; 1674 1675 if (via == NULL) 1676 return; 1677 1678 local_irq_disable(); 1679 1680 drop_interrupts = 1; 1681 1682 if (pmu_kind != PMU_KEYLARGO_BASED) { 1683 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1684 PMU_INT_TICK ); 1685 while(!req.complete) 1686 pmu_poll(); 1687 } 1688 1689 pmu_request(&req, NULL, 1, PMU_RESET); 1690 pmu_wait_complete(&req); 1691 for (;;) 1692 ; 1693 } 1694 1695 void 1696 pmu_shutdown(void) 1697 { 1698 struct adb_request req; 1699 1700 if (via == NULL) 1701 return; 1702 1703 local_irq_disable(); 1704 1705 drop_interrupts = 1; 1706 1707 if (pmu_kind != PMU_KEYLARGO_BASED) { 1708 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1709 PMU_INT_TICK ); 1710 pmu_wait_complete(&req); 1711 } else { 1712 /* Disable server mode on shutdown or we'll just 1713 * wake up again 1714 */ 1715 pmu_set_server_mode(0); 1716 } 1717 1718 pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 1719 'M', 'A', 'T', 'T'); 1720 pmu_wait_complete(&req); 1721 for (;;) 1722 ; 1723 } 1724 1725 int 1726 pmu_present(void) 1727 { 1728 return via != 0; 1729 } 1730 1731 #ifdef CONFIG_PM 1732 1733 static LIST_HEAD(sleep_notifiers); 1734 1735 int 1736 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n) 1737 { 1738 struct list_head *list; 1739 struct pmu_sleep_notifier *notifier; 1740 1741 for (list = sleep_notifiers.next; list != &sleep_notifiers; 1742 list = list->next) { 1743 notifier = list_entry(list, struct pmu_sleep_notifier, list); 1744 if (n->priority > notifier->priority) 1745 break; 1746 } 1747 __list_add(&n->list, list->prev, list); 1748 return 0; 1749 } 1750 EXPORT_SYMBOL(pmu_register_sleep_notifier); 1751 1752 int 1753 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n) 1754 { 1755 if (n->list.next == 0) 1756 return -ENOENT; 1757 list_del(&n->list); 1758 n->list.next = NULL; 1759 return 0; 1760 } 1761 EXPORT_SYMBOL(pmu_unregister_sleep_notifier); 1762 #endif /* CONFIG_PM */ 1763 1764 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 1765 1766 /* Sleep is broadcast last-to-first */ 1767 static int 1768 broadcast_sleep(int when, int fallback) 1769 { 1770 int ret = PBOOK_SLEEP_OK; 1771 struct list_head *list; 1772 struct pmu_sleep_notifier *notifier; 1773 1774 for (list = sleep_notifiers.prev; list != &sleep_notifiers; 1775 list = list->prev) { 1776 notifier = list_entry(list, struct pmu_sleep_notifier, list); 1777 ret = notifier->notifier_call(notifier, when); 1778 if (ret != PBOOK_SLEEP_OK) { 1779 printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n", 1780 when, notifier, notifier->notifier_call); 1781 for (; list != &sleep_notifiers; list = list->next) { 1782 notifier = list_entry(list, struct pmu_sleep_notifier, list); 1783 notifier->notifier_call(notifier, fallback); 1784 } 1785 return ret; 1786 } 1787 } 1788 return ret; 1789 } 1790 1791 /* Wake is broadcast first-to-last */ 1792 static int 1793 broadcast_wake(void) 1794 { 1795 int ret = PBOOK_SLEEP_OK; 1796 struct list_head *list; 1797 struct pmu_sleep_notifier *notifier; 1798 1799 for (list = sleep_notifiers.next; list != &sleep_notifiers; 1800 list = list->next) { 1801 notifier = list_entry(list, struct pmu_sleep_notifier, list); 1802 notifier->notifier_call(notifier, PBOOK_WAKE); 1803 } 1804 return ret; 1805 } 1806 1807 /* 1808 * This struct is used to store config register values for 1809 * PCI devices which may get powered off when we sleep. 1810 */ 1811 static struct pci_save { 1812 #ifndef HACKED_PCI_SAVE 1813 u16 command; 1814 u16 cache_lat; 1815 u16 intr; 1816 u32 rom_address; 1817 #else 1818 u32 config[16]; 1819 #endif 1820 } *pbook_pci_saves; 1821 static int pbook_npci_saves; 1822 1823 static void 1824 pbook_alloc_pci_save(void) 1825 { 1826 int npci; 1827 struct pci_dev *pd = NULL; 1828 1829 npci = 0; 1830 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 1831 ++npci; 1832 } 1833 if (npci == 0) 1834 return; 1835 pbook_pci_saves = (struct pci_save *) 1836 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL); 1837 pbook_npci_saves = npci; 1838 } 1839 1840 static void 1841 pbook_free_pci_save(void) 1842 { 1843 if (pbook_pci_saves == NULL) 1844 return; 1845 kfree(pbook_pci_saves); 1846 pbook_pci_saves = NULL; 1847 pbook_npci_saves = 0; 1848 } 1849 1850 static void 1851 pbook_pci_save(void) 1852 { 1853 struct pci_save *ps = pbook_pci_saves; 1854 struct pci_dev *pd = NULL; 1855 int npci = pbook_npci_saves; 1856 1857 if (ps == NULL) 1858 return; 1859 1860 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 1861 if (npci-- == 0) 1862 return; 1863 #ifndef HACKED_PCI_SAVE 1864 pci_read_config_word(pd, PCI_COMMAND, &ps->command); 1865 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat); 1866 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr); 1867 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address); 1868 #else 1869 int i; 1870 for (i=1;i<16;i++) 1871 pci_read_config_dword(pd, i<<4, &ps->config[i]); 1872 #endif 1873 ++ps; 1874 } 1875 } 1876 1877 /* For this to work, we must take care of a few things: If gmac was enabled 1878 * during boot, it will be in the pci dev list. If it's disabled at this point 1879 * (and it will probably be), then you can't access it's config space. 1880 */ 1881 static void 1882 pbook_pci_restore(void) 1883 { 1884 u16 cmd; 1885 struct pci_save *ps = pbook_pci_saves - 1; 1886 struct pci_dev *pd = NULL; 1887 int npci = pbook_npci_saves; 1888 int j; 1889 1890 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 1891 #ifdef HACKED_PCI_SAVE 1892 int i; 1893 if (npci-- == 0) 1894 return; 1895 ps++; 1896 for (i=2;i<16;i++) 1897 pci_write_config_dword(pd, i<<4, ps->config[i]); 1898 pci_write_config_dword(pd, 4, ps->config[1]); 1899 #else 1900 if (npci-- == 0) 1901 return; 1902 ps++; 1903 if (ps->command == 0) 1904 continue; 1905 pci_read_config_word(pd, PCI_COMMAND, &cmd); 1906 if ((ps->command & ~cmd) == 0) 1907 continue; 1908 switch (pd->hdr_type) { 1909 case PCI_HEADER_TYPE_NORMAL: 1910 for (j = 0; j < 6; ++j) 1911 pci_write_config_dword(pd, 1912 PCI_BASE_ADDRESS_0 + j*4, 1913 pd->resource[j].start); 1914 pci_write_config_dword(pd, PCI_ROM_ADDRESS, 1915 ps->rom_address); 1916 pci_write_config_word(pd, PCI_CACHE_LINE_SIZE, 1917 ps->cache_lat); 1918 pci_write_config_word(pd, PCI_INTERRUPT_LINE, 1919 ps->intr); 1920 pci_write_config_word(pd, PCI_COMMAND, ps->command); 1921 break; 1922 } 1923 #endif 1924 } 1925 } 1926 1927 #ifdef DEBUG_SLEEP 1928 /* N.B. This doesn't work on the 3400 */ 1929 void 1930 pmu_blink(int n) 1931 { 1932 struct adb_request req; 1933 1934 memset(&req, 0, sizeof(req)); 1935 1936 for (; n > 0; --n) { 1937 req.nbytes = 4; 1938 req.done = NULL; 1939 req.data[0] = 0xee; 1940 req.data[1] = 4; 1941 req.data[2] = 0; 1942 req.data[3] = 1; 1943 req.reply[0] = ADB_RET_OK; 1944 req.reply_len = 1; 1945 req.reply_expected = 0; 1946 pmu_polled_request(&req); 1947 mdelay(50); 1948 req.nbytes = 4; 1949 req.done = NULL; 1950 req.data[0] = 0xee; 1951 req.data[1] = 4; 1952 req.data[2] = 0; 1953 req.data[3] = 0; 1954 req.reply[0] = ADB_RET_OK; 1955 req.reply_len = 1; 1956 req.reply_expected = 0; 1957 pmu_polled_request(&req); 1958 mdelay(50); 1959 } 1960 mdelay(50); 1961 } 1962 #endif 1963 1964 /* 1965 * Put the powerbook to sleep. 1966 */ 1967 1968 static u32 save_via[8]; 1969 1970 static void 1971 save_via_state(void) 1972 { 1973 save_via[0] = in_8(&via[ANH]); 1974 save_via[1] = in_8(&via[DIRA]); 1975 save_via[2] = in_8(&via[B]); 1976 save_via[3] = in_8(&via[DIRB]); 1977 save_via[4] = in_8(&via[PCR]); 1978 save_via[5] = in_8(&via[ACR]); 1979 save_via[6] = in_8(&via[T1CL]); 1980 save_via[7] = in_8(&via[T1CH]); 1981 } 1982 static void 1983 restore_via_state(void) 1984 { 1985 out_8(&via[ANH], save_via[0]); 1986 out_8(&via[DIRA], save_via[1]); 1987 out_8(&via[B], save_via[2]); 1988 out_8(&via[DIRB], save_via[3]); 1989 out_8(&via[PCR], save_via[4]); 1990 out_8(&via[ACR], save_via[5]); 1991 out_8(&via[T1CL], save_via[6]); 1992 out_8(&via[T1CH], save_via[7]); 1993 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 1994 out_8(&via[IFR], 0x7f); /* clear IFR */ 1995 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 1996 } 1997 1998 static int 1999 pmac_suspend_devices(void) 2000 { 2001 int ret; 2002 2003 pm_prepare_console(); 2004 2005 /* Notify old-style device drivers & userland */ 2006 ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT); 2007 if (ret != PBOOK_SLEEP_OK) { 2008 printk(KERN_ERR "Sleep rejected by drivers\n"); 2009 return -EBUSY; 2010 } 2011 2012 /* Sync the disks. */ 2013 /* XXX It would be nice to have some way to ensure that 2014 * nobody is dirtying any new buffers while we wait. That 2015 * could be achieved using the refrigerator for processes 2016 * that swsusp uses 2017 */ 2018 sys_sync(); 2019 2020 /* Sleep can fail now. May not be very robust but useful for debugging */ 2021 ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE); 2022 if (ret != PBOOK_SLEEP_OK) { 2023 printk(KERN_ERR "Driver sleep failed\n"); 2024 return -EBUSY; 2025 } 2026 2027 /* Send suspend call to devices, hold the device core's dpm_sem */ 2028 ret = device_suspend(PMSG_SUSPEND); 2029 if (ret) { 2030 broadcast_wake(); 2031 printk(KERN_ERR "Driver sleep failed\n"); 2032 return -EBUSY; 2033 } 2034 2035 /* Call platform functions marked "on sleep" */ 2036 pmac_pfunc_i2c_suspend(); 2037 pmac_pfunc_base_suspend(); 2038 2039 /* Stop preemption */ 2040 preempt_disable(); 2041 2042 /* Make sure the decrementer won't interrupt us */ 2043 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 2044 /* Make sure any pending DEC interrupt occurring while we did 2045 * the above didn't re-enable the DEC */ 2046 mb(); 2047 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 2048 2049 /* We can now disable MSR_EE. This code of course works properly only 2050 * on UP machines... For SMP, if we ever implement sleep, we'll have to 2051 * stop the "other" CPUs way before we do all that stuff. 2052 */ 2053 local_irq_disable(); 2054 2055 /* Broadcast power down irq 2056 * This isn't that useful in most cases (only directly wired devices can 2057 * use this but still... This will take care of sysdev's as well, so 2058 * we exit from here with local irqs disabled and PIC off. 2059 */ 2060 ret = device_power_down(PMSG_SUSPEND); 2061 if (ret) { 2062 wakeup_decrementer(); 2063 local_irq_enable(); 2064 preempt_enable(); 2065 device_resume(); 2066 broadcast_wake(); 2067 printk(KERN_ERR "Driver powerdown failed\n"); 2068 return -EBUSY; 2069 } 2070 2071 /* Wait for completion of async requests */ 2072 while (!batt_req.complete) 2073 pmu_poll(); 2074 2075 /* Giveup the lazy FPU & vec so we don't have to back them 2076 * up from the low level code 2077 */ 2078 enable_kernel_fp(); 2079 2080 #ifdef CONFIG_ALTIVEC 2081 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 2082 enable_kernel_altivec(); 2083 #endif /* CONFIG_ALTIVEC */ 2084 2085 return 0; 2086 } 2087 2088 static int 2089 pmac_wakeup_devices(void) 2090 { 2091 mdelay(100); 2092 2093 /* Power back up system devices (including the PIC) */ 2094 device_power_up(); 2095 2096 /* Force a poll of ADB interrupts */ 2097 adb_int_pending = 1; 2098 via_pmu_interrupt(0, NULL, NULL); 2099 2100 /* Restart jiffies & scheduling */ 2101 wakeup_decrementer(); 2102 2103 /* Re-enable local CPU interrupts */ 2104 local_irq_enable(); 2105 mdelay(10); 2106 preempt_enable(); 2107 2108 /* Call platform functions marked "on wake" */ 2109 pmac_pfunc_base_resume(); 2110 pmac_pfunc_i2c_resume(); 2111 2112 /* Resume devices */ 2113 device_resume(); 2114 2115 /* Notify old style drivers */ 2116 broadcast_wake(); 2117 2118 pm_restore_console(); 2119 2120 return 0; 2121 } 2122 2123 #define GRACKLE_PM (1<<7) 2124 #define GRACKLE_DOZE (1<<5) 2125 #define GRACKLE_NAP (1<<4) 2126 #define GRACKLE_SLEEP (1<<3) 2127 2128 static int powerbook_sleep_grackle(void) 2129 { 2130 unsigned long save_l2cr; 2131 unsigned short pmcr1; 2132 struct adb_request req; 2133 int ret; 2134 struct pci_dev *grackle; 2135 2136 grackle = pci_find_slot(0, 0); 2137 if (!grackle) 2138 return -ENODEV; 2139 2140 ret = pmac_suspend_devices(); 2141 if (ret) { 2142 printk(KERN_ERR "Sleep rejected by devices\n"); 2143 return ret; 2144 } 2145 2146 /* Turn off various things. Darwin does some retry tests here... */ 2147 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE); 2148 pmu_wait_complete(&req); 2149 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 2150 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY); 2151 pmu_wait_complete(&req); 2152 2153 /* For 750, save backside cache setting and disable it */ 2154 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 2155 2156 if (!__fake_sleep) { 2157 /* Ask the PMU to put us to sleep */ 2158 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2159 pmu_wait_complete(&req); 2160 } 2161 2162 /* The VIA is supposed not to be restored correctly*/ 2163 save_via_state(); 2164 /* We shut down some HW */ 2165 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 2166 2167 pci_read_config_word(grackle, 0x70, &pmcr1); 2168 /* Apparently, MacOS uses NAP mode for Grackle ??? */ 2169 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 2170 pmcr1 |= GRACKLE_PM|GRACKLE_NAP; 2171 pci_write_config_word(grackle, 0x70, pmcr1); 2172 2173 /* Call low-level ASM sleep handler */ 2174 if (__fake_sleep) 2175 mdelay(5000); 2176 else 2177 low_sleep_handler(); 2178 2179 /* We're awake again, stop grackle PM */ 2180 pci_read_config_word(grackle, 0x70, &pmcr1); 2181 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 2182 pci_write_config_word(grackle, 0x70, pmcr1); 2183 2184 /* Make sure the PMU is idle */ 2185 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 2186 restore_via_state(); 2187 2188 /* Restore L2 cache */ 2189 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2190 _set_L2CR(save_l2cr); 2191 2192 /* Restore userland MMU context */ 2193 set_context(current->active_mm->context.id, current->active_mm->pgd); 2194 2195 /* Power things up */ 2196 pmu_unlock(); 2197 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2198 pmu_wait_complete(&req); 2199 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, 2200 PMU_POW0_ON|PMU_POW0_HARD_DRIVE); 2201 pmu_wait_complete(&req); 2202 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 2203 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY); 2204 pmu_wait_complete(&req); 2205 2206 pmac_wakeup_devices(); 2207 2208 return 0; 2209 } 2210 2211 static int 2212 powerbook_sleep_Core99(void) 2213 { 2214 unsigned long save_l2cr; 2215 unsigned long save_l3cr; 2216 struct adb_request req; 2217 int ret; 2218 2219 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) { 2220 printk(KERN_ERR "Sleep mode not supported on this machine\n"); 2221 return -ENOSYS; 2222 } 2223 2224 if (num_online_cpus() > 1 || cpu_is_offline(0)) 2225 return -EAGAIN; 2226 2227 ret = pmac_suspend_devices(); 2228 if (ret) { 2229 printk(KERN_ERR "Sleep rejected by devices\n"); 2230 return ret; 2231 } 2232 2233 /* Stop environment and ADB interrupts */ 2234 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 2235 pmu_wait_complete(&req); 2236 2237 /* Tell PMU what events will wake us up */ 2238 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS, 2239 0xff, 0xff); 2240 pmu_wait_complete(&req); 2241 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS, 2242 0, PMU_PWR_WAKEUP_KEY | 2243 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0)); 2244 pmu_wait_complete(&req); 2245 2246 /* Save the state of the L2 and L3 caches */ 2247 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */ 2248 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 2249 2250 if (!__fake_sleep) { 2251 /* Ask the PMU to put us to sleep */ 2252 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2253 pmu_wait_complete(&req); 2254 } 2255 2256 /* The VIA is supposed not to be restored correctly*/ 2257 save_via_state(); 2258 2259 /* Shut down various ASICs. There's a chance that we can no longer 2260 * talk to the PMU after this, so I moved it to _after_ sending the 2261 * sleep command to it. Still need to be checked. 2262 */ 2263 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 2264 2265 /* Call low-level ASM sleep handler */ 2266 if (__fake_sleep) 2267 mdelay(5000); 2268 else 2269 low_sleep_handler(); 2270 2271 /* Restore Apple core ASICs state */ 2272 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 2273 2274 /* Restore VIA */ 2275 restore_via_state(); 2276 2277 /* tweak LPJ before cpufreq is there */ 2278 loops_per_jiffy *= 2; 2279 2280 /* Restore video */ 2281 pmac_call_early_video_resume(); 2282 2283 /* Restore L2 cache */ 2284 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2285 _set_L2CR(save_l2cr); 2286 /* Restore L3 cache */ 2287 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0) 2288 _set_L3CR(save_l3cr); 2289 2290 /* Restore userland MMU context */ 2291 set_context(current->active_mm->context.id, current->active_mm->pgd); 2292 2293 /* Tell PMU we are ready */ 2294 pmu_unlock(); 2295 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2296 pmu_wait_complete(&req); 2297 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2298 pmu_wait_complete(&req); 2299 2300 /* Restore LPJ, cpufreq will adjust the cpu frequency */ 2301 loops_per_jiffy /= 2; 2302 2303 pmac_wakeup_devices(); 2304 2305 return 0; 2306 } 2307 2308 #define PB3400_MEM_CTRL 0xf8000000 2309 #define PB3400_MEM_CTRL_SLEEP 0x70 2310 2311 static int 2312 powerbook_sleep_3400(void) 2313 { 2314 int ret, i, x; 2315 unsigned int hid0; 2316 unsigned long p; 2317 struct adb_request sleep_req; 2318 void __iomem *mem_ctrl; 2319 unsigned int __iomem *mem_ctrl_sleep; 2320 2321 /* first map in the memory controller registers */ 2322 mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100); 2323 if (mem_ctrl == NULL) { 2324 printk("powerbook_sleep_3400: ioremap failed\n"); 2325 return -ENOMEM; 2326 } 2327 mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP; 2328 2329 /* Allocate room for PCI save */ 2330 pbook_alloc_pci_save(); 2331 2332 ret = pmac_suspend_devices(); 2333 if (ret) { 2334 pbook_free_pci_save(); 2335 printk(KERN_ERR "Sleep rejected by devices\n"); 2336 return ret; 2337 } 2338 2339 /* Save the state of PCI config space for some slots */ 2340 pbook_pci_save(); 2341 2342 /* Set the memory controller to keep the memory refreshed 2343 while we're asleep */ 2344 for (i = 0x403f; i >= 0x4000; --i) { 2345 out_be32(mem_ctrl_sleep, i); 2346 do { 2347 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff; 2348 } while (x == 0); 2349 if (x >= 0x100) 2350 break; 2351 } 2352 2353 /* Ask the PMU to put us to sleep */ 2354 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2355 while (!sleep_req.complete) 2356 mb(); 2357 2358 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 2359 2360 /* displacement-flush the L2 cache - necessary? */ 2361 for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000) 2362 i = *(volatile int *)p; 2363 asleep = 1; 2364 2365 /* Put the CPU into sleep mode */ 2366 hid0 = mfspr(SPRN_HID0); 2367 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP; 2368 mtspr(SPRN_HID0, hid0); 2369 mtmsr(mfmsr() | MSR_POW | MSR_EE); 2370 udelay(10); 2371 2372 /* OK, we're awake again, start restoring things */ 2373 out_be32(mem_ctrl_sleep, 0x3f); 2374 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 2375 pbook_pci_restore(); 2376 pmu_unlock(); 2377 2378 /* wait for the PMU interrupt sequence to complete */ 2379 while (asleep) 2380 mb(); 2381 2382 pmac_wakeup_devices(); 2383 pbook_free_pci_save(); 2384 iounmap(mem_ctrl); 2385 2386 return 0; 2387 } 2388 2389 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2390 2391 /* 2392 * Support for /dev/pmu device 2393 */ 2394 #define RB_SIZE 0x10 2395 struct pmu_private { 2396 struct list_head list; 2397 int rb_get; 2398 int rb_put; 2399 struct rb_entry { 2400 unsigned short len; 2401 unsigned char data[16]; 2402 } rb_buf[RB_SIZE]; 2403 wait_queue_head_t wait; 2404 spinlock_t lock; 2405 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2406 int backlight_locker; 2407 #endif 2408 }; 2409 2410 static LIST_HEAD(all_pmu_pvt); 2411 static DEFINE_SPINLOCK(all_pvt_lock); 2412 2413 static void 2414 pmu_pass_intr(unsigned char *data, int len) 2415 { 2416 struct pmu_private *pp; 2417 struct list_head *list; 2418 int i; 2419 unsigned long flags; 2420 2421 if (len > sizeof(pp->rb_buf[0].data)) 2422 len = sizeof(pp->rb_buf[0].data); 2423 spin_lock_irqsave(&all_pvt_lock, flags); 2424 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) { 2425 pp = list_entry(list, struct pmu_private, list); 2426 spin_lock(&pp->lock); 2427 i = pp->rb_put + 1; 2428 if (i >= RB_SIZE) 2429 i = 0; 2430 if (i != pp->rb_get) { 2431 struct rb_entry *rp = &pp->rb_buf[pp->rb_put]; 2432 rp->len = len; 2433 memcpy(rp->data, data, len); 2434 pp->rb_put = i; 2435 wake_up_interruptible(&pp->wait); 2436 } 2437 spin_unlock(&pp->lock); 2438 } 2439 spin_unlock_irqrestore(&all_pvt_lock, flags); 2440 } 2441 2442 static int 2443 pmu_open(struct inode *inode, struct file *file) 2444 { 2445 struct pmu_private *pp; 2446 unsigned long flags; 2447 2448 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL); 2449 if (pp == 0) 2450 return -ENOMEM; 2451 pp->rb_get = pp->rb_put = 0; 2452 spin_lock_init(&pp->lock); 2453 init_waitqueue_head(&pp->wait); 2454 spin_lock_irqsave(&all_pvt_lock, flags); 2455 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2456 pp->backlight_locker = 0; 2457 #endif 2458 list_add(&pp->list, &all_pmu_pvt); 2459 spin_unlock_irqrestore(&all_pvt_lock, flags); 2460 file->private_data = pp; 2461 return 0; 2462 } 2463 2464 static ssize_t 2465 pmu_read(struct file *file, char __user *buf, 2466 size_t count, loff_t *ppos) 2467 { 2468 struct pmu_private *pp = file->private_data; 2469 DECLARE_WAITQUEUE(wait, current); 2470 unsigned long flags; 2471 int ret = 0; 2472 2473 if (count < 1 || pp == 0) 2474 return -EINVAL; 2475 if (!access_ok(VERIFY_WRITE, buf, count)) 2476 return -EFAULT; 2477 2478 spin_lock_irqsave(&pp->lock, flags); 2479 add_wait_queue(&pp->wait, &wait); 2480 current->state = TASK_INTERRUPTIBLE; 2481 2482 for (;;) { 2483 ret = -EAGAIN; 2484 if (pp->rb_get != pp->rb_put) { 2485 int i = pp->rb_get; 2486 struct rb_entry *rp = &pp->rb_buf[i]; 2487 ret = rp->len; 2488 spin_unlock_irqrestore(&pp->lock, flags); 2489 if (ret > count) 2490 ret = count; 2491 if (ret > 0 && copy_to_user(buf, rp->data, ret)) 2492 ret = -EFAULT; 2493 if (++i >= RB_SIZE) 2494 i = 0; 2495 spin_lock_irqsave(&pp->lock, flags); 2496 pp->rb_get = i; 2497 } 2498 if (ret >= 0) 2499 break; 2500 if (file->f_flags & O_NONBLOCK) 2501 break; 2502 ret = -ERESTARTSYS; 2503 if (signal_pending(current)) 2504 break; 2505 spin_unlock_irqrestore(&pp->lock, flags); 2506 schedule(); 2507 spin_lock_irqsave(&pp->lock, flags); 2508 } 2509 current->state = TASK_RUNNING; 2510 remove_wait_queue(&pp->wait, &wait); 2511 spin_unlock_irqrestore(&pp->lock, flags); 2512 2513 return ret; 2514 } 2515 2516 static ssize_t 2517 pmu_write(struct file *file, const char __user *buf, 2518 size_t count, loff_t *ppos) 2519 { 2520 return 0; 2521 } 2522 2523 static unsigned int 2524 pmu_fpoll(struct file *filp, poll_table *wait) 2525 { 2526 struct pmu_private *pp = filp->private_data; 2527 unsigned int mask = 0; 2528 unsigned long flags; 2529 2530 if (pp == 0) 2531 return 0; 2532 poll_wait(filp, &pp->wait, wait); 2533 spin_lock_irqsave(&pp->lock, flags); 2534 if (pp->rb_get != pp->rb_put) 2535 mask |= POLLIN; 2536 spin_unlock_irqrestore(&pp->lock, flags); 2537 return mask; 2538 } 2539 2540 static int 2541 pmu_release(struct inode *inode, struct file *file) 2542 { 2543 struct pmu_private *pp = file->private_data; 2544 unsigned long flags; 2545 2546 lock_kernel(); 2547 if (pp != 0) { 2548 file->private_data = NULL; 2549 spin_lock_irqsave(&all_pvt_lock, flags); 2550 list_del(&pp->list); 2551 spin_unlock_irqrestore(&all_pvt_lock, flags); 2552 2553 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2554 if (pp->backlight_locker) 2555 pmac_backlight_enable(); 2556 #endif 2557 2558 kfree(pp); 2559 } 2560 unlock_kernel(); 2561 return 0; 2562 } 2563 2564 static int 2565 pmu_ioctl(struct inode * inode, struct file *filp, 2566 u_int cmd, u_long arg) 2567 { 2568 __u32 __user *argp = (__u32 __user *)arg; 2569 int error = -EINVAL; 2570 2571 switch (cmd) { 2572 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2573 case PMU_IOC_SLEEP: 2574 if (!capable(CAP_SYS_ADMIN)) 2575 return -EACCES; 2576 if (sleep_in_progress) 2577 return -EBUSY; 2578 sleep_in_progress = 1; 2579 switch (pmu_kind) { 2580 case PMU_OHARE_BASED: 2581 error = powerbook_sleep_3400(); 2582 break; 2583 case PMU_HEATHROW_BASED: 2584 case PMU_PADDINGTON_BASED: 2585 error = powerbook_sleep_grackle(); 2586 break; 2587 case PMU_KEYLARGO_BASED: 2588 error = powerbook_sleep_Core99(); 2589 break; 2590 default: 2591 error = -ENOSYS; 2592 } 2593 sleep_in_progress = 0; 2594 break; 2595 case PMU_IOC_CAN_SLEEP: 2596 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) 2597 return put_user(0, argp); 2598 else 2599 return put_user(1, argp); 2600 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2601 2602 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY 2603 /* Compatibility ioctl's for backlight */ 2604 case PMU_IOC_GET_BACKLIGHT: 2605 { 2606 int brightness; 2607 2608 if (sleep_in_progress) 2609 return -EBUSY; 2610 2611 brightness = pmac_backlight_get_legacy_brightness(); 2612 if (brightness < 0) 2613 return brightness; 2614 else 2615 return put_user(brightness, argp); 2616 2617 } 2618 case PMU_IOC_SET_BACKLIGHT: 2619 { 2620 int brightness; 2621 2622 if (sleep_in_progress) 2623 return -EBUSY; 2624 2625 error = get_user(brightness, argp); 2626 if (error) 2627 return error; 2628 2629 return pmac_backlight_set_legacy_brightness(brightness); 2630 } 2631 #ifdef CONFIG_INPUT_ADBHID 2632 case PMU_IOC_GRAB_BACKLIGHT: { 2633 struct pmu_private *pp = filp->private_data; 2634 2635 if (pp->backlight_locker) 2636 return 0; 2637 2638 pp->backlight_locker = 1; 2639 pmac_backlight_disable(); 2640 2641 return 0; 2642 } 2643 #endif /* CONFIG_INPUT_ADBHID */ 2644 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */ 2645 2646 case PMU_IOC_GET_MODEL: 2647 return put_user(pmu_kind, argp); 2648 case PMU_IOC_HAS_ADB: 2649 return put_user(pmu_has_adb, argp); 2650 } 2651 return error; 2652 } 2653 2654 static struct file_operations pmu_device_fops = { 2655 .read = pmu_read, 2656 .write = pmu_write, 2657 .poll = pmu_fpoll, 2658 .ioctl = pmu_ioctl, 2659 .open = pmu_open, 2660 .release = pmu_release, 2661 }; 2662 2663 static struct miscdevice pmu_device = { 2664 PMU_MINOR, "pmu", &pmu_device_fops 2665 }; 2666 2667 static int pmu_device_init(void) 2668 { 2669 if (!via) 2670 return 0; 2671 if (misc_register(&pmu_device) < 0) 2672 printk(KERN_ERR "via-pmu: cannot register misc device.\n"); 2673 return 0; 2674 } 2675 device_initcall(pmu_device_init); 2676 2677 2678 #ifdef DEBUG_SLEEP 2679 static inline void 2680 polled_handshake(volatile unsigned char __iomem *via) 2681 { 2682 via[B] &= ~TREQ; eieio(); 2683 while ((via[B] & TACK) != 0) 2684 ; 2685 via[B] |= TREQ; eieio(); 2686 while ((via[B] & TACK) == 0) 2687 ; 2688 } 2689 2690 static inline void 2691 polled_send_byte(volatile unsigned char __iomem *via, int x) 2692 { 2693 via[ACR] |= SR_OUT | SR_EXT; eieio(); 2694 via[SR] = x; eieio(); 2695 polled_handshake(via); 2696 } 2697 2698 static inline int 2699 polled_recv_byte(volatile unsigned char __iomem *via) 2700 { 2701 int x; 2702 2703 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio(); 2704 x = via[SR]; eieio(); 2705 polled_handshake(via); 2706 x = via[SR]; eieio(); 2707 return x; 2708 } 2709 2710 int 2711 pmu_polled_request(struct adb_request *req) 2712 { 2713 unsigned long flags; 2714 int i, l, c; 2715 volatile unsigned char __iomem *v = via; 2716 2717 req->complete = 1; 2718 c = req->data[0]; 2719 l = pmu_data_len[c][0]; 2720 if (l >= 0 && req->nbytes != l + 1) 2721 return -EINVAL; 2722 2723 local_irq_save(flags); 2724 while (pmu_state != idle) 2725 pmu_poll(); 2726 2727 while ((via[B] & TACK) == 0) 2728 ; 2729 polled_send_byte(v, c); 2730 if (l < 0) { 2731 l = req->nbytes - 1; 2732 polled_send_byte(v, l); 2733 } 2734 for (i = 1; i <= l; ++i) 2735 polled_send_byte(v, req->data[i]); 2736 2737 l = pmu_data_len[c][1]; 2738 if (l < 0) 2739 l = polled_recv_byte(v); 2740 for (i = 0; i < l; ++i) 2741 req->reply[i + req->reply_len] = polled_recv_byte(v); 2742 2743 if (req->done) 2744 (*req->done)(req); 2745 2746 local_irq_restore(flags); 2747 return 0; 2748 } 2749 #endif /* DEBUG_SLEEP */ 2750 2751 2752 /* FIXME: This is a temporary set of callbacks to enable us 2753 * to do suspend-to-disk. 2754 */ 2755 2756 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2757 2758 static int pmu_sys_suspended = 0; 2759 2760 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state) 2761 { 2762 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended) 2763 return 0; 2764 2765 /* Suspend PMU event interrupts */ 2766 pmu_suspend(); 2767 2768 pmu_sys_suspended = 1; 2769 return 0; 2770 } 2771 2772 static int pmu_sys_resume(struct sys_device *sysdev) 2773 { 2774 struct adb_request req; 2775 2776 if (!pmu_sys_suspended) 2777 return 0; 2778 2779 /* Tell PMU we are ready */ 2780 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2781 pmu_wait_complete(&req); 2782 2783 /* Resume PMU event interrupts */ 2784 pmu_resume(); 2785 2786 pmu_sys_suspended = 0; 2787 2788 return 0; 2789 } 2790 2791 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2792 2793 static struct sysdev_class pmu_sysclass = { 2794 set_kset_name("pmu"), 2795 }; 2796 2797 static struct sys_device device_pmu = { 2798 .id = 0, 2799 .cls = &pmu_sysclass, 2800 }; 2801 2802 static struct sysdev_driver driver_pmu = { 2803 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2804 .suspend = &pmu_sys_suspend, 2805 .resume = &pmu_sys_resume, 2806 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2807 }; 2808 2809 static int __init init_pmu_sysfs(void) 2810 { 2811 int rc; 2812 2813 rc = sysdev_class_register(&pmu_sysclass); 2814 if (rc) { 2815 printk(KERN_ERR "Failed registering PMU sys class\n"); 2816 return -ENODEV; 2817 } 2818 rc = sysdev_register(&device_pmu); 2819 if (rc) { 2820 printk(KERN_ERR "Failed registering PMU sys device\n"); 2821 return -ENODEV; 2822 } 2823 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu); 2824 if (rc) { 2825 printk(KERN_ERR "Failed registering PMU sys driver\n"); 2826 return -ENODEV; 2827 } 2828 return 0; 2829 } 2830 2831 subsys_initcall(init_pmu_sysfs); 2832 2833 EXPORT_SYMBOL(pmu_request); 2834 EXPORT_SYMBOL(pmu_queue_request); 2835 EXPORT_SYMBOL(pmu_poll); 2836 EXPORT_SYMBOL(pmu_poll_adb); 2837 EXPORT_SYMBOL(pmu_wait_complete); 2838 EXPORT_SYMBOL(pmu_suspend); 2839 EXPORT_SYMBOL(pmu_resume); 2840 EXPORT_SYMBOL(pmu_unlock); 2841 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2842 EXPORT_SYMBOL(pmu_enable_irled); 2843 EXPORT_SYMBOL(pmu_battery_count); 2844 EXPORT_SYMBOL(pmu_batteries); 2845 EXPORT_SYMBOL(pmu_power_flags); 2846 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2847 2848