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