1 /* 2 * Device driver for the via-pmu on Apple Powermacs. 3 * 4 * The VIA (versatile interface adapter) interfaces to the PMU, 5 * a 6805 microprocessor core whose primary function is to control 6 * battery charging and system power on the PowerBook 3400 and 2400. 7 * The PMU also controls the ADB (Apple Desktop Bus) which connects 8 * to the keyboard and mouse, as well as the non-volatile RAM 9 * and the RTC (real time clock) chip. 10 * 11 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi. 12 * Copyright (C) 2001-2002 Benjamin Herrenschmidt 13 * Copyright (C) 2006-2007 Johannes Berg 14 * 15 * THIS DRIVER IS BECOMING A TOTAL MESS ! 16 * - Cleanup atomically disabling reply to PMU events after 17 * a sleep or a freq. switch 18 * 19 */ 20 #include <stdarg.h> 21 #include <linux/mutex.h> 22 #include <linux/types.h> 23 #include <linux/errno.h> 24 #include <linux/kernel.h> 25 #include <linux/delay.h> 26 #include <linux/sched.h> 27 #include <linux/miscdevice.h> 28 #include <linux/blkdev.h> 29 #include <linux/pci.h> 30 #include <linux/slab.h> 31 #include <linux/poll.h> 32 #include <linux/adb.h> 33 #include <linux/pmu.h> 34 #include <linux/cuda.h> 35 #include <linux/module.h> 36 #include <linux/spinlock.h> 37 #include <linux/pm.h> 38 #include <linux/proc_fs.h> 39 #include <linux/seq_file.h> 40 #include <linux/init.h> 41 #include <linux/interrupt.h> 42 #include <linux/device.h> 43 #include <linux/syscore_ops.h> 44 #include <linux/freezer.h> 45 #include <linux/syscalls.h> 46 #include <linux/suspend.h> 47 #include <linux/cpu.h> 48 #include <linux/compat.h> 49 #include <linux/of_address.h> 50 #include <linux/of_irq.h> 51 #include <asm/prom.h> 52 #include <asm/machdep.h> 53 #include <asm/io.h> 54 #include <asm/pgtable.h> 55 #include <asm/sections.h> 56 #include <asm/irq.h> 57 #include <asm/pmac_feature.h> 58 #include <asm/pmac_pfunc.h> 59 #include <asm/pmac_low_i2c.h> 60 #include <asm/uaccess.h> 61 #include <asm/mmu_context.h> 62 #include <asm/cputable.h> 63 #include <asm/time.h> 64 #include <asm/backlight.h> 65 66 #include "via-pmu-event.h" 67 68 /* Some compile options */ 69 #undef DEBUG_SLEEP 70 71 /* Misc minor number allocated for /dev/pmu */ 72 #define PMU_MINOR 154 73 74 /* How many iterations between battery polls */ 75 #define BATTERY_POLLING_COUNT 2 76 77 static DEFINE_MUTEX(pmu_info_proc_mutex); 78 static volatile unsigned char __iomem *via; 79 80 /* VIA registers - spaced 0x200 bytes apart */ 81 #define RS 0x200 /* skip between registers */ 82 #define B 0 /* B-side data */ 83 #define A RS /* A-side data */ 84 #define DIRB (2*RS) /* B-side direction (1=output) */ 85 #define DIRA (3*RS) /* A-side direction (1=output) */ 86 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */ 87 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */ 88 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */ 89 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */ 90 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */ 91 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */ 92 #define SR (10*RS) /* Shift register */ 93 #define ACR (11*RS) /* Auxiliary control register */ 94 #define PCR (12*RS) /* Peripheral control register */ 95 #define IFR (13*RS) /* Interrupt flag register */ 96 #define IER (14*RS) /* Interrupt enable register */ 97 #define ANH (15*RS) /* A-side data, no handshake */ 98 99 /* Bits in B data register: both active low */ 100 #define TACK 0x08 /* Transfer acknowledge (input) */ 101 #define TREQ 0x10 /* Transfer request (output) */ 102 103 /* Bits in ACR */ 104 #define SR_CTRL 0x1c /* Shift register control bits */ 105 #define SR_EXT 0x0c /* Shift on external clock */ 106 #define SR_OUT 0x10 /* Shift out if 1 */ 107 108 /* Bits in IFR and IER */ 109 #define IER_SET 0x80 /* set bits in IER */ 110 #define IER_CLR 0 /* clear bits in IER */ 111 #define SR_INT 0x04 /* Shift register full/empty */ 112 #define CB2_INT 0x08 113 #define CB1_INT 0x10 /* transition on CB1 input */ 114 115 static volatile enum pmu_state { 116 idle, 117 sending, 118 intack, 119 reading, 120 reading_intr, 121 locked, 122 } pmu_state; 123 124 static volatile enum int_data_state { 125 int_data_empty, 126 int_data_fill, 127 int_data_ready, 128 int_data_flush 129 } int_data_state[2] = { int_data_empty, int_data_empty }; 130 131 static struct adb_request *current_req; 132 static struct adb_request *last_req; 133 static struct adb_request *req_awaiting_reply; 134 static unsigned char interrupt_data[2][32]; 135 static int interrupt_data_len[2]; 136 static int int_data_last; 137 static unsigned char *reply_ptr; 138 static int data_index; 139 static int data_len; 140 static volatile int adb_int_pending; 141 static volatile int disable_poll; 142 static struct device_node *vias; 143 static int pmu_kind = PMU_UNKNOWN; 144 static int pmu_fully_inited; 145 static int pmu_has_adb; 146 static struct device_node *gpio_node; 147 static unsigned char __iomem *gpio_reg; 148 static int gpio_irq = NO_IRQ; 149 static int gpio_irq_enabled = -1; 150 static volatile int pmu_suspended; 151 static spinlock_t pmu_lock; 152 static u8 pmu_intr_mask; 153 static int pmu_version; 154 static int drop_interrupts; 155 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 156 static int option_lid_wakeup = 1; 157 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 158 static unsigned long async_req_locks; 159 static unsigned int pmu_irq_stats[11]; 160 161 static struct proc_dir_entry *proc_pmu_root; 162 static struct proc_dir_entry *proc_pmu_info; 163 static struct proc_dir_entry *proc_pmu_irqstats; 164 static struct proc_dir_entry *proc_pmu_options; 165 static int option_server_mode; 166 167 int pmu_battery_count; 168 int pmu_cur_battery; 169 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT; 170 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES]; 171 static int query_batt_timer = BATTERY_POLLING_COUNT; 172 static struct adb_request batt_req; 173 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES]; 174 175 int __fake_sleep; 176 int asleep; 177 178 #ifdef CONFIG_ADB 179 static int adb_dev_map; 180 static int pmu_adb_flags; 181 182 static int pmu_probe(void); 183 static int pmu_init(void); 184 static int pmu_send_request(struct adb_request *req, int sync); 185 static int pmu_adb_autopoll(int devs); 186 static int pmu_adb_reset_bus(void); 187 #endif /* CONFIG_ADB */ 188 189 static int init_pmu(void); 190 static void pmu_start(void); 191 static irqreturn_t via_pmu_interrupt(int irq, void *arg); 192 static irqreturn_t gpio1_interrupt(int irq, void *arg); 193 static const struct file_operations pmu_info_proc_fops; 194 static const struct file_operations pmu_irqstats_proc_fops; 195 static void pmu_pass_intr(unsigned char *data, int len); 196 static const struct file_operations pmu_battery_proc_fops; 197 static const struct file_operations pmu_options_proc_fops; 198 199 #ifdef CONFIG_ADB 200 struct adb_driver via_pmu_driver = { 201 "PMU", 202 pmu_probe, 203 pmu_init, 204 pmu_send_request, 205 pmu_adb_autopoll, 206 pmu_poll_adb, 207 pmu_adb_reset_bus 208 }; 209 #endif /* CONFIG_ADB */ 210 211 extern void low_sleep_handler(void); 212 extern void enable_kernel_altivec(void); 213 extern void enable_kernel_fp(void); 214 215 #ifdef DEBUG_SLEEP 216 int pmu_polled_request(struct adb_request *req); 217 void pmu_blink(int n); 218 #endif 219 220 /* 221 * This table indicates for each PMU opcode: 222 * - the number of data bytes to be sent with the command, or -1 223 * if a length byte should be sent, 224 * - the number of response bytes which the PMU will return, or 225 * -1 if it will send a length byte. 226 */ 227 static const s8 pmu_data_len[256][2] = { 228 /* 0 1 2 3 4 5 6 7 */ 229 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 230 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 231 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 232 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0}, 233 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0}, 234 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1}, 235 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 236 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0}, 237 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 238 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1}, 239 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0}, 240 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1}, 241 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 242 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1}, 243 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 244 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1}, 245 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 246 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 247 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 248 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 249 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0}, 250 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 251 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 252 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 253 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 254 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 255 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 256 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1}, 257 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0}, 258 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0}, 259 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 260 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 261 }; 262 263 static char *pbook_type[] = { 264 "Unknown PowerBook", 265 "PowerBook 2400/3400/3500(G3)", 266 "PowerBook G3 Series", 267 "1999 PowerBook G3", 268 "Core99" 269 }; 270 271 int __init find_via_pmu(void) 272 { 273 u64 taddr; 274 const u32 *reg; 275 276 if (via != 0) 277 return 1; 278 vias = of_find_node_by_name(NULL, "via-pmu"); 279 if (vias == NULL) 280 return 0; 281 282 reg = of_get_property(vias, "reg", NULL); 283 if (reg == NULL) { 284 printk(KERN_ERR "via-pmu: No \"reg\" property !\n"); 285 goto fail; 286 } 287 taddr = of_translate_address(vias, reg); 288 if (taddr == OF_BAD_ADDR) { 289 printk(KERN_ERR "via-pmu: Can't translate address !\n"); 290 goto fail; 291 } 292 293 spin_lock_init(&pmu_lock); 294 295 pmu_has_adb = 1; 296 297 pmu_intr_mask = PMU_INT_PCEJECT | 298 PMU_INT_SNDBRT | 299 PMU_INT_ADB | 300 PMU_INT_TICK; 301 302 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0) 303 || of_device_is_compatible(vias->parent, "ohare"))) 304 pmu_kind = PMU_OHARE_BASED; 305 else if (of_device_is_compatible(vias->parent, "paddington")) 306 pmu_kind = PMU_PADDINGTON_BASED; 307 else if (of_device_is_compatible(vias->parent, "heathrow")) 308 pmu_kind = PMU_HEATHROW_BASED; 309 else if (of_device_is_compatible(vias->parent, "Keylargo") 310 || of_device_is_compatible(vias->parent, "K2-Keylargo")) { 311 struct device_node *gpiop; 312 struct device_node *adbp; 313 u64 gaddr = OF_BAD_ADDR; 314 315 pmu_kind = PMU_KEYLARGO_BASED; 316 adbp = of_find_node_by_type(NULL, "adb"); 317 pmu_has_adb = (adbp != NULL); 318 of_node_put(adbp); 319 pmu_intr_mask = PMU_INT_PCEJECT | 320 PMU_INT_SNDBRT | 321 PMU_INT_ADB | 322 PMU_INT_TICK | 323 PMU_INT_ENVIRONMENT; 324 325 gpiop = of_find_node_by_name(NULL, "gpio"); 326 if (gpiop) { 327 reg = of_get_property(gpiop, "reg", NULL); 328 if (reg) 329 gaddr = of_translate_address(gpiop, reg); 330 if (gaddr != OF_BAD_ADDR) 331 gpio_reg = ioremap(gaddr, 0x10); 332 of_node_put(gpiop); 333 } 334 if (gpio_reg == NULL) { 335 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n"); 336 goto fail; 337 } 338 } else 339 pmu_kind = PMU_UNKNOWN; 340 341 via = ioremap(taddr, 0x2000); 342 if (via == NULL) { 343 printk(KERN_ERR "via-pmu: Can't map address !\n"); 344 goto fail_via_remap; 345 } 346 347 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 348 out_8(&via[IFR], 0x7f); /* clear IFR */ 349 350 pmu_state = idle; 351 352 if (!init_pmu()) 353 goto fail_init; 354 355 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n", 356 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version); 357 358 sys_ctrler = SYS_CTRLER_PMU; 359 360 return 1; 361 362 fail_init: 363 iounmap(via); 364 via = NULL; 365 fail_via_remap: 366 iounmap(gpio_reg); 367 gpio_reg = NULL; 368 fail: 369 of_node_put(vias); 370 vias = NULL; 371 return 0; 372 } 373 374 #ifdef CONFIG_ADB 375 static int pmu_probe(void) 376 { 377 return vias == NULL? -ENODEV: 0; 378 } 379 380 static int __init pmu_init(void) 381 { 382 if (vias == NULL) 383 return -ENODEV; 384 return 0; 385 } 386 #endif /* CONFIG_ADB */ 387 388 /* 389 * We can't wait until pmu_init gets called, that happens too late. 390 * It happens after IDE and SCSI initialization, which can take a few 391 * seconds, and by that time the PMU could have given up on us and 392 * turned us off. 393 * Thus this is called with arch_initcall rather than device_initcall. 394 */ 395 static int __init via_pmu_start(void) 396 { 397 unsigned int irq; 398 399 if (vias == NULL) 400 return -ENODEV; 401 402 batt_req.complete = 1; 403 404 irq = irq_of_parse_and_map(vias, 0); 405 if (irq == NO_IRQ) { 406 printk(KERN_ERR "via-pmu: can't map interrupt\n"); 407 return -ENODEV; 408 } 409 /* We set IRQF_NO_SUSPEND because we don't want the interrupt 410 * to be disabled between the 2 passes of driver suspend, we 411 * control our own disabling for that one 412 */ 413 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND, 414 "VIA-PMU", (void *)0)) { 415 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq); 416 return -ENODEV; 417 } 418 419 if (pmu_kind == PMU_KEYLARGO_BASED) { 420 gpio_node = of_find_node_by_name(NULL, "extint-gpio1"); 421 if (gpio_node == NULL) 422 gpio_node = of_find_node_by_name(NULL, 423 "pmu-interrupt"); 424 if (gpio_node) 425 gpio_irq = irq_of_parse_and_map(gpio_node, 0); 426 427 if (gpio_irq != NO_IRQ) { 428 if (request_irq(gpio_irq, gpio1_interrupt, 429 IRQF_NO_SUSPEND, "GPIO1 ADB", 430 (void *)0)) 431 printk(KERN_ERR "pmu: can't get irq %d" 432 " (GPIO1)\n", gpio_irq); 433 else 434 gpio_irq_enabled = 1; 435 } 436 } 437 438 /* Enable interrupts */ 439 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 440 441 pmu_fully_inited = 1; 442 443 /* Make sure PMU settle down before continuing. This is _very_ important 444 * since the IDE probe may shut interrupts down for quite a bit of time. If 445 * a PMU communication is pending while this happens, the PMU may timeout 446 * Not that on Core99 machines, the PMU keeps sending us environement 447 * messages, we should find a way to either fix IDE or make it call 448 * pmu_suspend() before masking interrupts. This can also happens while 449 * scolling with some fbdevs. 450 */ 451 do { 452 pmu_poll(); 453 } while (pmu_state != idle); 454 455 return 0; 456 } 457 458 arch_initcall(via_pmu_start); 459 460 /* 461 * This has to be done after pci_init, which is a subsys_initcall. 462 */ 463 static int __init via_pmu_dev_init(void) 464 { 465 if (vias == NULL) 466 return -ENODEV; 467 468 #ifdef CONFIG_PMAC_BACKLIGHT 469 /* Initialize backlight */ 470 pmu_backlight_init(); 471 #endif 472 473 #ifdef CONFIG_PPC32 474 if (of_machine_is_compatible("AAPL,3400/2400") || 475 of_machine_is_compatible("AAPL,3500")) { 476 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 477 NULL, PMAC_MB_INFO_MODEL, 0); 478 pmu_battery_count = 1; 479 if (mb == PMAC_TYPE_COMET) 480 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET; 481 else 482 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER; 483 } else if (of_machine_is_compatible("AAPL,PowerBook1998") || 484 of_machine_is_compatible("PowerBook1,1")) { 485 pmu_battery_count = 2; 486 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 487 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 488 } else { 489 struct device_node* prim = 490 of_find_node_by_name(NULL, "power-mgt"); 491 const u32 *prim_info = NULL; 492 if (prim) 493 prim_info = of_get_property(prim, "prim-info", NULL); 494 if (prim_info) { 495 /* Other stuffs here yet unknown */ 496 pmu_battery_count = (prim_info[6] >> 16) & 0xff; 497 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 498 if (pmu_battery_count > 1) 499 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 500 } 501 of_node_put(prim); 502 } 503 #endif /* CONFIG_PPC32 */ 504 505 /* Create /proc/pmu */ 506 proc_pmu_root = proc_mkdir("pmu", NULL); 507 if (proc_pmu_root) { 508 long i; 509 510 for (i=0; i<pmu_battery_count; i++) { 511 char title[16]; 512 sprintf(title, "battery_%ld", i); 513 proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root, 514 &pmu_battery_proc_fops, (void *)i); 515 } 516 517 proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops); 518 proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root, 519 &pmu_irqstats_proc_fops); 520 proc_pmu_options = proc_create("options", 0600, proc_pmu_root, 521 &pmu_options_proc_fops); 522 } 523 return 0; 524 } 525 526 device_initcall(via_pmu_dev_init); 527 528 static int 529 init_pmu(void) 530 { 531 int timeout; 532 struct adb_request req; 533 534 out_8(&via[B], via[B] | TREQ); /* negate TREQ */ 535 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */ 536 537 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 538 timeout = 100000; 539 while (!req.complete) { 540 if (--timeout < 0) { 541 printk(KERN_ERR "init_pmu: no response from PMU\n"); 542 return 0; 543 } 544 udelay(10); 545 pmu_poll(); 546 } 547 548 /* ack all pending interrupts */ 549 timeout = 100000; 550 interrupt_data[0][0] = 1; 551 while (interrupt_data[0][0] || pmu_state != idle) { 552 if (--timeout < 0) { 553 printk(KERN_ERR "init_pmu: timed out acking intrs\n"); 554 return 0; 555 } 556 if (pmu_state == idle) 557 adb_int_pending = 1; 558 via_pmu_interrupt(0, NULL); 559 udelay(10); 560 } 561 562 /* Tell PMU we are ready. */ 563 if (pmu_kind == PMU_KEYLARGO_BASED) { 564 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 565 while (!req.complete) 566 pmu_poll(); 567 } 568 569 /* Read PMU version */ 570 pmu_request(&req, NULL, 1, PMU_GET_VERSION); 571 pmu_wait_complete(&req); 572 if (req.reply_len > 0) 573 pmu_version = req.reply[0]; 574 575 /* Read server mode setting */ 576 if (pmu_kind == PMU_KEYLARGO_BASED) { 577 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, 578 PMU_PWR_GET_POWERUP_EVENTS); 579 pmu_wait_complete(&req); 580 if (req.reply_len == 2) { 581 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT) 582 option_server_mode = 1; 583 printk(KERN_INFO "via-pmu: Server Mode is %s\n", 584 option_server_mode ? "enabled" : "disabled"); 585 } 586 } 587 return 1; 588 } 589 590 int 591 pmu_get_model(void) 592 { 593 return pmu_kind; 594 } 595 596 static void pmu_set_server_mode(int server_mode) 597 { 598 struct adb_request req; 599 600 if (pmu_kind != PMU_KEYLARGO_BASED) 601 return; 602 603 option_server_mode = server_mode; 604 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS); 605 pmu_wait_complete(&req); 606 if (req.reply_len < 2) 607 return; 608 if (server_mode) 609 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 610 PMU_PWR_SET_POWERUP_EVENTS, 611 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 612 else 613 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 614 PMU_PWR_CLR_POWERUP_EVENTS, 615 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 616 pmu_wait_complete(&req); 617 } 618 619 /* This new version of the code for 2400/3400/3500 powerbooks 620 * is inspired from the implementation in gkrellm-pmu 621 */ 622 static void 623 done_battery_state_ohare(struct adb_request* req) 624 { 625 /* format: 626 * [0] : flags 627 * 0x01 : AC indicator 628 * 0x02 : charging 629 * 0x04 : battery exist 630 * 0x08 : 631 * 0x10 : 632 * 0x20 : full charged 633 * 0x40 : pcharge reset 634 * 0x80 : battery exist 635 * 636 * [1][2] : battery voltage 637 * [3] : CPU temperature 638 * [4] : battery temperature 639 * [5] : current 640 * [6][7] : pcharge 641 * --tkoba 642 */ 643 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER; 644 long pcharge, charge, vb, vmax, lmax; 645 long vmax_charging, vmax_charged; 646 long amperage, voltage, time, max; 647 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 648 NULL, PMAC_MB_INFO_MODEL, 0); 649 650 if (req->reply[0] & 0x01) 651 pmu_power_flags |= PMU_PWR_AC_PRESENT; 652 else 653 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 654 655 if (mb == PMAC_TYPE_COMET) { 656 vmax_charged = 189; 657 vmax_charging = 213; 658 lmax = 6500; 659 } else { 660 vmax_charged = 330; 661 vmax_charging = 330; 662 lmax = 6500; 663 } 664 vmax = vmax_charged; 665 666 /* If battery installed */ 667 if (req->reply[0] & 0x04) { 668 bat_flags |= PMU_BATT_PRESENT; 669 if (req->reply[0] & 0x02) 670 bat_flags |= PMU_BATT_CHARGING; 671 vb = (req->reply[1] << 8) | req->reply[2]; 672 voltage = (vb * 265 + 72665) / 10; 673 amperage = req->reply[5]; 674 if ((req->reply[0] & 0x01) == 0) { 675 if (amperage > 200) 676 vb += ((amperage - 200) * 15)/100; 677 } else if (req->reply[0] & 0x02) { 678 vb = (vb * 97) / 100; 679 vmax = vmax_charging; 680 } 681 charge = (100 * vb) / vmax; 682 if (req->reply[0] & 0x40) { 683 pcharge = (req->reply[6] << 8) + req->reply[7]; 684 if (pcharge > lmax) 685 pcharge = lmax; 686 pcharge *= 100; 687 pcharge = 100 - pcharge / lmax; 688 if (pcharge < charge) 689 charge = pcharge; 690 } 691 if (amperage > 0) 692 time = (charge * 16440) / amperage; 693 else 694 time = 0; 695 max = 100; 696 amperage = -amperage; 697 } else 698 charge = max = amperage = voltage = time = 0; 699 700 pmu_batteries[pmu_cur_battery].flags = bat_flags; 701 pmu_batteries[pmu_cur_battery].charge = charge; 702 pmu_batteries[pmu_cur_battery].max_charge = max; 703 pmu_batteries[pmu_cur_battery].amperage = amperage; 704 pmu_batteries[pmu_cur_battery].voltage = voltage; 705 pmu_batteries[pmu_cur_battery].time_remaining = time; 706 707 clear_bit(0, &async_req_locks); 708 } 709 710 static void 711 done_battery_state_smart(struct adb_request* req) 712 { 713 /* format: 714 * [0] : format of this structure (known: 3,4,5) 715 * [1] : flags 716 * 717 * format 3 & 4: 718 * 719 * [2] : charge 720 * [3] : max charge 721 * [4] : current 722 * [5] : voltage 723 * 724 * format 5: 725 * 726 * [2][3] : charge 727 * [4][5] : max charge 728 * [6][7] : current 729 * [8][9] : voltage 730 */ 731 732 unsigned int bat_flags = PMU_BATT_TYPE_SMART; 733 int amperage; 734 unsigned int capa, max, voltage; 735 736 if (req->reply[1] & 0x01) 737 pmu_power_flags |= PMU_PWR_AC_PRESENT; 738 else 739 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 740 741 742 capa = max = amperage = voltage = 0; 743 744 if (req->reply[1] & 0x04) { 745 bat_flags |= PMU_BATT_PRESENT; 746 switch(req->reply[0]) { 747 case 3: 748 case 4: capa = req->reply[2]; 749 max = req->reply[3]; 750 amperage = *((signed char *)&req->reply[4]); 751 voltage = req->reply[5]; 752 break; 753 case 5: capa = (req->reply[2] << 8) | req->reply[3]; 754 max = (req->reply[4] << 8) | req->reply[5]; 755 amperage = *((signed short *)&req->reply[6]); 756 voltage = (req->reply[8] << 8) | req->reply[9]; 757 break; 758 default: 759 pr_warn("pmu.c: unrecognized battery info, " 760 "len: %d, %4ph\n", req->reply_len, 761 req->reply); 762 break; 763 } 764 } 765 766 if ((req->reply[1] & 0x01) && (amperage > 0)) 767 bat_flags |= PMU_BATT_CHARGING; 768 769 pmu_batteries[pmu_cur_battery].flags = bat_flags; 770 pmu_batteries[pmu_cur_battery].charge = capa; 771 pmu_batteries[pmu_cur_battery].max_charge = max; 772 pmu_batteries[pmu_cur_battery].amperage = amperage; 773 pmu_batteries[pmu_cur_battery].voltage = voltage; 774 if (amperage) { 775 if ((req->reply[1] & 0x01) && (amperage > 0)) 776 pmu_batteries[pmu_cur_battery].time_remaining 777 = ((max-capa) * 3600) / amperage; 778 else 779 pmu_batteries[pmu_cur_battery].time_remaining 780 = (capa * 3600) / (-amperage); 781 } else 782 pmu_batteries[pmu_cur_battery].time_remaining = 0; 783 784 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count; 785 786 clear_bit(0, &async_req_locks); 787 } 788 789 static void 790 query_battery_state(void) 791 { 792 if (test_and_set_bit(0, &async_req_locks)) 793 return; 794 if (pmu_kind == PMU_OHARE_BASED) 795 pmu_request(&batt_req, done_battery_state_ohare, 796 1, PMU_BATTERY_STATE); 797 else 798 pmu_request(&batt_req, done_battery_state_smart, 799 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1); 800 } 801 802 static int pmu_info_proc_show(struct seq_file *m, void *v) 803 { 804 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION); 805 seq_printf(m, "PMU firmware version : %02x\n", pmu_version); 806 seq_printf(m, "AC Power : %d\n", 807 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0); 808 seq_printf(m, "Battery count : %d\n", pmu_battery_count); 809 810 return 0; 811 } 812 813 static int pmu_info_proc_open(struct inode *inode, struct file *file) 814 { 815 return single_open(file, pmu_info_proc_show, NULL); 816 } 817 818 static const struct file_operations pmu_info_proc_fops = { 819 .owner = THIS_MODULE, 820 .open = pmu_info_proc_open, 821 .read = seq_read, 822 .llseek = seq_lseek, 823 .release = single_release, 824 }; 825 826 static int pmu_irqstats_proc_show(struct seq_file *m, void *v) 827 { 828 int i; 829 static const char *irq_names[] = { 830 "Total CB1 triggered events", 831 "Total GPIO1 triggered events", 832 "PC-Card eject button", 833 "Sound/Brightness button", 834 "ADB message", 835 "Battery state change", 836 "Environment interrupt", 837 "Tick timer", 838 "Ghost interrupt (zero len)", 839 "Empty interrupt (empty mask)", 840 "Max irqs in a row" 841 }; 842 843 for (i=0; i<11; i++) { 844 seq_printf(m, " %2u: %10u (%s)\n", 845 i, pmu_irq_stats[i], irq_names[i]); 846 } 847 return 0; 848 } 849 850 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file) 851 { 852 return single_open(file, pmu_irqstats_proc_show, NULL); 853 } 854 855 static const struct file_operations pmu_irqstats_proc_fops = { 856 .owner = THIS_MODULE, 857 .open = pmu_irqstats_proc_open, 858 .read = seq_read, 859 .llseek = seq_lseek, 860 .release = single_release, 861 }; 862 863 static int pmu_battery_proc_show(struct seq_file *m, void *v) 864 { 865 long batnum = (long)m->private; 866 867 seq_putc(m, '\n'); 868 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags); 869 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge); 870 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge); 871 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage); 872 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage); 873 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining); 874 return 0; 875 } 876 877 static int pmu_battery_proc_open(struct inode *inode, struct file *file) 878 { 879 return single_open(file, pmu_battery_proc_show, PDE_DATA(inode)); 880 } 881 882 static const struct file_operations pmu_battery_proc_fops = { 883 .owner = THIS_MODULE, 884 .open = pmu_battery_proc_open, 885 .read = seq_read, 886 .llseek = seq_lseek, 887 .release = single_release, 888 }; 889 890 static int pmu_options_proc_show(struct seq_file *m, void *v) 891 { 892 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 893 if (pmu_kind == PMU_KEYLARGO_BASED && 894 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 895 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup); 896 #endif 897 if (pmu_kind == PMU_KEYLARGO_BASED) 898 seq_printf(m, "server_mode=%d\n", option_server_mode); 899 900 return 0; 901 } 902 903 static int pmu_options_proc_open(struct inode *inode, struct file *file) 904 { 905 return single_open(file, pmu_options_proc_show, NULL); 906 } 907 908 static ssize_t pmu_options_proc_write(struct file *file, 909 const char __user *buffer, size_t count, loff_t *pos) 910 { 911 char tmp[33]; 912 char *label, *val; 913 size_t fcount = count; 914 915 if (!count) 916 return -EINVAL; 917 if (count > 32) 918 count = 32; 919 if (copy_from_user(tmp, buffer, count)) 920 return -EFAULT; 921 tmp[count] = 0; 922 923 label = tmp; 924 while(*label == ' ') 925 label++; 926 val = label; 927 while(*val && (*val != '=')) { 928 if (*val == ' ') 929 *val = 0; 930 val++; 931 } 932 if ((*val) == 0) 933 return -EINVAL; 934 *(val++) = 0; 935 while(*val == ' ') 936 val++; 937 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 938 if (pmu_kind == PMU_KEYLARGO_BASED && 939 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 940 if (!strcmp(label, "lid_wakeup")) 941 option_lid_wakeup = ((*val) == '1'); 942 #endif 943 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) { 944 int new_value; 945 new_value = ((*val) == '1'); 946 if (new_value != option_server_mode) 947 pmu_set_server_mode(new_value); 948 } 949 return fcount; 950 } 951 952 static const struct file_operations pmu_options_proc_fops = { 953 .owner = THIS_MODULE, 954 .open = pmu_options_proc_open, 955 .read = seq_read, 956 .llseek = seq_lseek, 957 .release = single_release, 958 .write = pmu_options_proc_write, 959 }; 960 961 #ifdef CONFIG_ADB 962 /* Send an ADB command */ 963 static int pmu_send_request(struct adb_request *req, int sync) 964 { 965 int i, ret; 966 967 if ((vias == NULL) || (!pmu_fully_inited)) { 968 req->complete = 1; 969 return -ENXIO; 970 } 971 972 ret = -EINVAL; 973 974 switch (req->data[0]) { 975 case PMU_PACKET: 976 for (i = 0; i < req->nbytes - 1; ++i) 977 req->data[i] = req->data[i+1]; 978 --req->nbytes; 979 if (pmu_data_len[req->data[0]][1] != 0) { 980 req->reply[0] = ADB_RET_OK; 981 req->reply_len = 1; 982 } else 983 req->reply_len = 0; 984 ret = pmu_queue_request(req); 985 break; 986 case CUDA_PACKET: 987 switch (req->data[1]) { 988 case CUDA_GET_TIME: 989 if (req->nbytes != 2) 990 break; 991 req->data[0] = PMU_READ_RTC; 992 req->nbytes = 1; 993 req->reply_len = 3; 994 req->reply[0] = CUDA_PACKET; 995 req->reply[1] = 0; 996 req->reply[2] = CUDA_GET_TIME; 997 ret = pmu_queue_request(req); 998 break; 999 case CUDA_SET_TIME: 1000 if (req->nbytes != 6) 1001 break; 1002 req->data[0] = PMU_SET_RTC; 1003 req->nbytes = 5; 1004 for (i = 1; i <= 4; ++i) 1005 req->data[i] = req->data[i+1]; 1006 req->reply_len = 3; 1007 req->reply[0] = CUDA_PACKET; 1008 req->reply[1] = 0; 1009 req->reply[2] = CUDA_SET_TIME; 1010 ret = pmu_queue_request(req); 1011 break; 1012 } 1013 break; 1014 case ADB_PACKET: 1015 if (!pmu_has_adb) 1016 return -ENXIO; 1017 for (i = req->nbytes - 1; i > 1; --i) 1018 req->data[i+2] = req->data[i]; 1019 req->data[3] = req->nbytes - 2; 1020 req->data[2] = pmu_adb_flags; 1021 /*req->data[1] = req->data[1];*/ 1022 req->data[0] = PMU_ADB_CMD; 1023 req->nbytes += 2; 1024 req->reply_expected = 1; 1025 req->reply_len = 0; 1026 ret = pmu_queue_request(req); 1027 break; 1028 } 1029 if (ret) { 1030 req->complete = 1; 1031 return ret; 1032 } 1033 1034 if (sync) 1035 while (!req->complete) 1036 pmu_poll(); 1037 1038 return 0; 1039 } 1040 1041 /* Enable/disable autopolling */ 1042 static int __pmu_adb_autopoll(int devs) 1043 { 1044 struct adb_request req; 1045 1046 if (devs) { 1047 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86, 1048 adb_dev_map >> 8, adb_dev_map); 1049 pmu_adb_flags = 2; 1050 } else { 1051 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF); 1052 pmu_adb_flags = 0; 1053 } 1054 while (!req.complete) 1055 pmu_poll(); 1056 return 0; 1057 } 1058 1059 static int pmu_adb_autopoll(int devs) 1060 { 1061 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1062 return -ENXIO; 1063 1064 adb_dev_map = devs; 1065 return __pmu_adb_autopoll(devs); 1066 } 1067 1068 /* Reset the ADB bus */ 1069 static int pmu_adb_reset_bus(void) 1070 { 1071 struct adb_request req; 1072 int save_autopoll = adb_dev_map; 1073 1074 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1075 return -ENXIO; 1076 1077 /* anyone got a better idea?? */ 1078 __pmu_adb_autopoll(0); 1079 1080 req.nbytes = 4; 1081 req.done = NULL; 1082 req.data[0] = PMU_ADB_CMD; 1083 req.data[1] = ADB_BUSRESET; 1084 req.data[2] = 0; 1085 req.data[3] = 0; 1086 req.data[4] = 0; 1087 req.reply_len = 0; 1088 req.reply_expected = 1; 1089 if (pmu_queue_request(&req) != 0) { 1090 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n"); 1091 return -EIO; 1092 } 1093 pmu_wait_complete(&req); 1094 1095 if (save_autopoll != 0) 1096 __pmu_adb_autopoll(save_autopoll); 1097 1098 return 0; 1099 } 1100 #endif /* CONFIG_ADB */ 1101 1102 /* Construct and send a pmu request */ 1103 int 1104 pmu_request(struct adb_request *req, void (*done)(struct adb_request *), 1105 int nbytes, ...) 1106 { 1107 va_list list; 1108 int i; 1109 1110 if (vias == NULL) 1111 return -ENXIO; 1112 1113 if (nbytes < 0 || nbytes > 32) { 1114 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes); 1115 req->complete = 1; 1116 return -EINVAL; 1117 } 1118 req->nbytes = nbytes; 1119 req->done = done; 1120 va_start(list, nbytes); 1121 for (i = 0; i < nbytes; ++i) 1122 req->data[i] = va_arg(list, int); 1123 va_end(list); 1124 req->reply_len = 0; 1125 req->reply_expected = 0; 1126 return pmu_queue_request(req); 1127 } 1128 1129 int 1130 pmu_queue_request(struct adb_request *req) 1131 { 1132 unsigned long flags; 1133 int nsend; 1134 1135 if (via == NULL) { 1136 req->complete = 1; 1137 return -ENXIO; 1138 } 1139 if (req->nbytes <= 0) { 1140 req->complete = 1; 1141 return 0; 1142 } 1143 nsend = pmu_data_len[req->data[0]][0]; 1144 if (nsend >= 0 && req->nbytes != nsend + 1) { 1145 req->complete = 1; 1146 return -EINVAL; 1147 } 1148 1149 req->next = NULL; 1150 req->sent = 0; 1151 req->complete = 0; 1152 1153 spin_lock_irqsave(&pmu_lock, flags); 1154 if (current_req != 0) { 1155 last_req->next = req; 1156 last_req = req; 1157 } else { 1158 current_req = req; 1159 last_req = req; 1160 if (pmu_state == idle) 1161 pmu_start(); 1162 } 1163 spin_unlock_irqrestore(&pmu_lock, flags); 1164 1165 return 0; 1166 } 1167 1168 static inline void 1169 wait_for_ack(void) 1170 { 1171 /* Sightly increased the delay, I had one occurrence of the message 1172 * reported 1173 */ 1174 int timeout = 4000; 1175 while ((in_8(&via[B]) & TACK) == 0) { 1176 if (--timeout < 0) { 1177 printk(KERN_ERR "PMU not responding (!ack)\n"); 1178 return; 1179 } 1180 udelay(10); 1181 } 1182 } 1183 1184 /* New PMU seems to be very sensitive to those timings, so we make sure 1185 * PCI is flushed immediately */ 1186 static inline void 1187 send_byte(int x) 1188 { 1189 volatile unsigned char __iomem *v = via; 1190 1191 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT); 1192 out_8(&v[SR], x); 1193 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */ 1194 (void)in_8(&v[B]); 1195 } 1196 1197 static inline void 1198 recv_byte(void) 1199 { 1200 volatile unsigned char __iomem *v = via; 1201 1202 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT); 1203 in_8(&v[SR]); /* resets SR */ 1204 out_8(&v[B], in_8(&v[B]) & ~TREQ); 1205 (void)in_8(&v[B]); 1206 } 1207 1208 static inline void 1209 pmu_done(struct adb_request *req) 1210 { 1211 void (*done)(struct adb_request *) = req->done; 1212 mb(); 1213 req->complete = 1; 1214 /* Here, we assume that if the request has a done member, the 1215 * struct request will survive to setting req->complete to 1 1216 */ 1217 if (done) 1218 (*done)(req); 1219 } 1220 1221 static void 1222 pmu_start(void) 1223 { 1224 struct adb_request *req; 1225 1226 /* assert pmu_state == idle */ 1227 /* get the packet to send */ 1228 req = current_req; 1229 if (req == 0 || pmu_state != idle 1230 || (/*req->reply_expected && */req_awaiting_reply)) 1231 return; 1232 1233 pmu_state = sending; 1234 data_index = 1; 1235 data_len = pmu_data_len[req->data[0]][0]; 1236 1237 /* Sounds safer to make sure ACK is high before writing. This helped 1238 * kill a problem with ADB and some iBooks 1239 */ 1240 wait_for_ack(); 1241 /* set the shift register to shift out and send a byte */ 1242 send_byte(req->data[0]); 1243 } 1244 1245 void 1246 pmu_poll(void) 1247 { 1248 if (!via) 1249 return; 1250 if (disable_poll) 1251 return; 1252 via_pmu_interrupt(0, NULL); 1253 } 1254 1255 void 1256 pmu_poll_adb(void) 1257 { 1258 if (!via) 1259 return; 1260 if (disable_poll) 1261 return; 1262 /* Kicks ADB read when PMU is suspended */ 1263 adb_int_pending = 1; 1264 do { 1265 via_pmu_interrupt(0, NULL); 1266 } while (pmu_suspended && (adb_int_pending || pmu_state != idle 1267 || req_awaiting_reply)); 1268 } 1269 1270 void 1271 pmu_wait_complete(struct adb_request *req) 1272 { 1273 if (!via) 1274 return; 1275 while((pmu_state != idle && pmu_state != locked) || !req->complete) 1276 via_pmu_interrupt(0, NULL); 1277 } 1278 1279 /* This function loops until the PMU is idle and prevents it from 1280 * anwsering to ADB interrupts. pmu_request can still be called. 1281 * This is done to avoid spurrious shutdowns when we know we'll have 1282 * interrupts switched off for a long time 1283 */ 1284 void 1285 pmu_suspend(void) 1286 { 1287 unsigned long flags; 1288 1289 if (!via) 1290 return; 1291 1292 spin_lock_irqsave(&pmu_lock, flags); 1293 pmu_suspended++; 1294 if (pmu_suspended > 1) { 1295 spin_unlock_irqrestore(&pmu_lock, flags); 1296 return; 1297 } 1298 1299 do { 1300 spin_unlock_irqrestore(&pmu_lock, flags); 1301 if (req_awaiting_reply) 1302 adb_int_pending = 1; 1303 via_pmu_interrupt(0, NULL); 1304 spin_lock_irqsave(&pmu_lock, flags); 1305 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) { 1306 if (gpio_irq >= 0) 1307 disable_irq_nosync(gpio_irq); 1308 out_8(&via[IER], CB1_INT | IER_CLR); 1309 spin_unlock_irqrestore(&pmu_lock, flags); 1310 break; 1311 } 1312 } while (1); 1313 } 1314 1315 void 1316 pmu_resume(void) 1317 { 1318 unsigned long flags; 1319 1320 if (!via || (pmu_suspended < 1)) 1321 return; 1322 1323 spin_lock_irqsave(&pmu_lock, flags); 1324 pmu_suspended--; 1325 if (pmu_suspended > 0) { 1326 spin_unlock_irqrestore(&pmu_lock, flags); 1327 return; 1328 } 1329 adb_int_pending = 1; 1330 if (gpio_irq >= 0) 1331 enable_irq(gpio_irq); 1332 out_8(&via[IER], CB1_INT | IER_SET); 1333 spin_unlock_irqrestore(&pmu_lock, flags); 1334 pmu_poll(); 1335 } 1336 1337 /* Interrupt data could be the result data from an ADB cmd */ 1338 static void 1339 pmu_handle_data(unsigned char *data, int len) 1340 { 1341 unsigned char ints, pirq; 1342 int i = 0; 1343 1344 asleep = 0; 1345 if (drop_interrupts || len < 1) { 1346 adb_int_pending = 0; 1347 pmu_irq_stats[8]++; 1348 return; 1349 } 1350 1351 /* Get PMU interrupt mask */ 1352 ints = data[0]; 1353 1354 /* Record zero interrupts for stats */ 1355 if (ints == 0) 1356 pmu_irq_stats[9]++; 1357 1358 /* Hack to deal with ADB autopoll flag */ 1359 if (ints & PMU_INT_ADB) 1360 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL); 1361 1362 next: 1363 1364 if (ints == 0) { 1365 if (i > pmu_irq_stats[10]) 1366 pmu_irq_stats[10] = i; 1367 return; 1368 } 1369 1370 for (pirq = 0; pirq < 8; pirq++) 1371 if (ints & (1 << pirq)) 1372 break; 1373 pmu_irq_stats[pirq]++; 1374 i++; 1375 ints &= ~(1 << pirq); 1376 1377 /* Note: for some reason, we get an interrupt with len=1, 1378 * data[0]==0 after each normal ADB interrupt, at least 1379 * on the Pismo. Still investigating... --BenH 1380 */ 1381 if ((1 << pirq) & PMU_INT_ADB) { 1382 if ((data[0] & PMU_INT_ADB_AUTO) == 0) { 1383 struct adb_request *req = req_awaiting_reply; 1384 if (req == 0) { 1385 printk(KERN_ERR "PMU: extra ADB reply\n"); 1386 return; 1387 } 1388 req_awaiting_reply = NULL; 1389 if (len <= 2) 1390 req->reply_len = 0; 1391 else { 1392 memcpy(req->reply, data + 1, len - 1); 1393 req->reply_len = len - 1; 1394 } 1395 pmu_done(req); 1396 } else { 1397 if (len == 4 && data[1] == 0x2c) { 1398 extern int xmon_wants_key, xmon_adb_keycode; 1399 if (xmon_wants_key) { 1400 xmon_adb_keycode = data[2]; 1401 return; 1402 } 1403 } 1404 #ifdef CONFIG_ADB 1405 /* 1406 * XXX On the [23]400 the PMU gives us an up 1407 * event for keycodes 0x74 or 0x75 when the PC 1408 * card eject buttons are released, so we 1409 * ignore those events. 1410 */ 1411 if (!(pmu_kind == PMU_OHARE_BASED && len == 4 1412 && data[1] == 0x2c && data[3] == 0xff 1413 && (data[2] & ~1) == 0xf4)) 1414 adb_input(data+1, len-1, 1); 1415 #endif /* CONFIG_ADB */ 1416 } 1417 } 1418 /* Sound/brightness button pressed */ 1419 else if ((1 << pirq) & PMU_INT_SNDBRT) { 1420 #ifdef CONFIG_PMAC_BACKLIGHT 1421 if (len == 3) 1422 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4); 1423 #endif 1424 } 1425 /* Tick interrupt */ 1426 else if ((1 << pirq) & PMU_INT_TICK) { 1427 /* Environement or tick interrupt, query batteries */ 1428 if (pmu_battery_count) { 1429 if ((--query_batt_timer) == 0) { 1430 query_battery_state(); 1431 query_batt_timer = BATTERY_POLLING_COUNT; 1432 } 1433 } 1434 } 1435 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) { 1436 if (pmu_battery_count) 1437 query_battery_state(); 1438 pmu_pass_intr(data, len); 1439 /* len == 6 is probably a bad check. But how do I 1440 * know what PMU versions send what events here? */ 1441 if (len == 6) { 1442 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8)); 1443 via_pmu_event(PMU_EVT_LID, data[1]&1); 1444 } 1445 } else { 1446 pmu_pass_intr(data, len); 1447 } 1448 goto next; 1449 } 1450 1451 static struct adb_request* 1452 pmu_sr_intr(void) 1453 { 1454 struct adb_request *req; 1455 int bite = 0; 1456 1457 if (via[B] & TREQ) { 1458 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]); 1459 out_8(&via[IFR], SR_INT); 1460 return NULL; 1461 } 1462 /* The ack may not yet be low when we get the interrupt */ 1463 while ((in_8(&via[B]) & TACK) != 0) 1464 ; 1465 1466 /* if reading grab the byte, and reset the interrupt */ 1467 if (pmu_state == reading || pmu_state == reading_intr) 1468 bite = in_8(&via[SR]); 1469 1470 /* reset TREQ and wait for TACK to go high */ 1471 out_8(&via[B], in_8(&via[B]) | TREQ); 1472 wait_for_ack(); 1473 1474 switch (pmu_state) { 1475 case sending: 1476 req = current_req; 1477 if (data_len < 0) { 1478 data_len = req->nbytes - 1; 1479 send_byte(data_len); 1480 break; 1481 } 1482 if (data_index <= data_len) { 1483 send_byte(req->data[data_index++]); 1484 break; 1485 } 1486 req->sent = 1; 1487 data_len = pmu_data_len[req->data[0]][1]; 1488 if (data_len == 0) { 1489 pmu_state = idle; 1490 current_req = req->next; 1491 if (req->reply_expected) 1492 req_awaiting_reply = req; 1493 else 1494 return req; 1495 } else { 1496 pmu_state = reading; 1497 data_index = 0; 1498 reply_ptr = req->reply + req->reply_len; 1499 recv_byte(); 1500 } 1501 break; 1502 1503 case intack: 1504 data_index = 0; 1505 data_len = -1; 1506 pmu_state = reading_intr; 1507 reply_ptr = interrupt_data[int_data_last]; 1508 recv_byte(); 1509 if (gpio_irq >= 0 && !gpio_irq_enabled) { 1510 enable_irq(gpio_irq); 1511 gpio_irq_enabled = 1; 1512 } 1513 break; 1514 1515 case reading: 1516 case reading_intr: 1517 if (data_len == -1) { 1518 data_len = bite; 1519 if (bite > 32) 1520 printk(KERN_ERR "PMU: bad reply len %d\n", bite); 1521 } else if (data_index < 32) { 1522 reply_ptr[data_index++] = bite; 1523 } 1524 if (data_index < data_len) { 1525 recv_byte(); 1526 break; 1527 } 1528 1529 if (pmu_state == reading_intr) { 1530 pmu_state = idle; 1531 int_data_state[int_data_last] = int_data_ready; 1532 interrupt_data_len[int_data_last] = data_len; 1533 } else { 1534 req = current_req; 1535 /* 1536 * For PMU sleep and freq change requests, we lock the 1537 * PMU until it's explicitly unlocked. This avoids any 1538 * spurrious event polling getting in 1539 */ 1540 current_req = req->next; 1541 req->reply_len += data_index; 1542 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED) 1543 pmu_state = locked; 1544 else 1545 pmu_state = idle; 1546 return req; 1547 } 1548 break; 1549 1550 default: 1551 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n", 1552 pmu_state); 1553 } 1554 return NULL; 1555 } 1556 1557 static irqreturn_t 1558 via_pmu_interrupt(int irq, void *arg) 1559 { 1560 unsigned long flags; 1561 int intr; 1562 int nloop = 0; 1563 int int_data = -1; 1564 struct adb_request *req = NULL; 1565 int handled = 0; 1566 1567 /* This is a bit brutal, we can probably do better */ 1568 spin_lock_irqsave(&pmu_lock, flags); 1569 ++disable_poll; 1570 1571 for (;;) { 1572 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT); 1573 if (intr == 0) 1574 break; 1575 handled = 1; 1576 if (++nloop > 1000) { 1577 printk(KERN_DEBUG "PMU: stuck in intr loop, " 1578 "intr=%x, ier=%x pmu_state=%d\n", 1579 intr, in_8(&via[IER]), pmu_state); 1580 break; 1581 } 1582 out_8(&via[IFR], intr); 1583 if (intr & CB1_INT) { 1584 adb_int_pending = 1; 1585 pmu_irq_stats[0]++; 1586 } 1587 if (intr & SR_INT) { 1588 req = pmu_sr_intr(); 1589 if (req) 1590 break; 1591 } 1592 } 1593 1594 recheck: 1595 if (pmu_state == idle) { 1596 if (adb_int_pending) { 1597 if (int_data_state[0] == int_data_empty) 1598 int_data_last = 0; 1599 else if (int_data_state[1] == int_data_empty) 1600 int_data_last = 1; 1601 else 1602 goto no_free_slot; 1603 pmu_state = intack; 1604 int_data_state[int_data_last] = int_data_fill; 1605 /* Sounds safer to make sure ACK is high before writing. 1606 * This helped kill a problem with ADB and some iBooks 1607 */ 1608 wait_for_ack(); 1609 send_byte(PMU_INT_ACK); 1610 adb_int_pending = 0; 1611 } else if (current_req) 1612 pmu_start(); 1613 } 1614 no_free_slot: 1615 /* Mark the oldest buffer for flushing */ 1616 if (int_data_state[!int_data_last] == int_data_ready) { 1617 int_data_state[!int_data_last] = int_data_flush; 1618 int_data = !int_data_last; 1619 } else if (int_data_state[int_data_last] == int_data_ready) { 1620 int_data_state[int_data_last] = int_data_flush; 1621 int_data = int_data_last; 1622 } 1623 --disable_poll; 1624 spin_unlock_irqrestore(&pmu_lock, flags); 1625 1626 /* Deal with completed PMU requests outside of the lock */ 1627 if (req) { 1628 pmu_done(req); 1629 req = NULL; 1630 } 1631 1632 /* Deal with interrupt datas outside of the lock */ 1633 if (int_data >= 0) { 1634 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]); 1635 spin_lock_irqsave(&pmu_lock, flags); 1636 ++disable_poll; 1637 int_data_state[int_data] = int_data_empty; 1638 int_data = -1; 1639 goto recheck; 1640 } 1641 1642 return IRQ_RETVAL(handled); 1643 } 1644 1645 void 1646 pmu_unlock(void) 1647 { 1648 unsigned long flags; 1649 1650 spin_lock_irqsave(&pmu_lock, flags); 1651 if (pmu_state == locked) 1652 pmu_state = idle; 1653 adb_int_pending = 1; 1654 spin_unlock_irqrestore(&pmu_lock, flags); 1655 } 1656 1657 1658 static irqreturn_t 1659 gpio1_interrupt(int irq, void *arg) 1660 { 1661 unsigned long flags; 1662 1663 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) { 1664 spin_lock_irqsave(&pmu_lock, flags); 1665 if (gpio_irq_enabled > 0) { 1666 disable_irq_nosync(gpio_irq); 1667 gpio_irq_enabled = 0; 1668 } 1669 pmu_irq_stats[1]++; 1670 adb_int_pending = 1; 1671 spin_unlock_irqrestore(&pmu_lock, flags); 1672 via_pmu_interrupt(0, NULL); 1673 return IRQ_HANDLED; 1674 } 1675 return IRQ_NONE; 1676 } 1677 1678 void 1679 pmu_enable_irled(int on) 1680 { 1681 struct adb_request req; 1682 1683 if (vias == NULL) 1684 return ; 1685 if (pmu_kind == PMU_KEYLARGO_BASED) 1686 return ; 1687 1688 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED | 1689 (on ? PMU_POW_ON : PMU_POW_OFF)); 1690 pmu_wait_complete(&req); 1691 } 1692 1693 void 1694 pmu_restart(void) 1695 { 1696 struct adb_request req; 1697 1698 if (via == NULL) 1699 return; 1700 1701 local_irq_disable(); 1702 1703 drop_interrupts = 1; 1704 1705 if (pmu_kind != PMU_KEYLARGO_BASED) { 1706 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1707 PMU_INT_TICK ); 1708 while(!req.complete) 1709 pmu_poll(); 1710 } 1711 1712 pmu_request(&req, NULL, 1, PMU_RESET); 1713 pmu_wait_complete(&req); 1714 for (;;) 1715 ; 1716 } 1717 1718 void 1719 pmu_shutdown(void) 1720 { 1721 struct adb_request req; 1722 1723 if (via == NULL) 1724 return; 1725 1726 local_irq_disable(); 1727 1728 drop_interrupts = 1; 1729 1730 if (pmu_kind != PMU_KEYLARGO_BASED) { 1731 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1732 PMU_INT_TICK ); 1733 pmu_wait_complete(&req); 1734 } else { 1735 /* Disable server mode on shutdown or we'll just 1736 * wake up again 1737 */ 1738 pmu_set_server_mode(0); 1739 } 1740 1741 pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 1742 'M', 'A', 'T', 'T'); 1743 pmu_wait_complete(&req); 1744 for (;;) 1745 ; 1746 } 1747 1748 int 1749 pmu_present(void) 1750 { 1751 return via != 0; 1752 } 1753 1754 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 1755 /* 1756 * Put the powerbook to sleep. 1757 */ 1758 1759 static u32 save_via[8]; 1760 1761 static void 1762 save_via_state(void) 1763 { 1764 save_via[0] = in_8(&via[ANH]); 1765 save_via[1] = in_8(&via[DIRA]); 1766 save_via[2] = in_8(&via[B]); 1767 save_via[3] = in_8(&via[DIRB]); 1768 save_via[4] = in_8(&via[PCR]); 1769 save_via[5] = in_8(&via[ACR]); 1770 save_via[6] = in_8(&via[T1CL]); 1771 save_via[7] = in_8(&via[T1CH]); 1772 } 1773 static void 1774 restore_via_state(void) 1775 { 1776 out_8(&via[ANH], save_via[0]); 1777 out_8(&via[DIRA], save_via[1]); 1778 out_8(&via[B], save_via[2]); 1779 out_8(&via[DIRB], save_via[3]); 1780 out_8(&via[PCR], save_via[4]); 1781 out_8(&via[ACR], save_via[5]); 1782 out_8(&via[T1CL], save_via[6]); 1783 out_8(&via[T1CH], save_via[7]); 1784 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 1785 out_8(&via[IFR], 0x7f); /* clear IFR */ 1786 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 1787 } 1788 1789 #define GRACKLE_PM (1<<7) 1790 #define GRACKLE_DOZE (1<<5) 1791 #define GRACKLE_NAP (1<<4) 1792 #define GRACKLE_SLEEP (1<<3) 1793 1794 static int powerbook_sleep_grackle(void) 1795 { 1796 unsigned long save_l2cr; 1797 unsigned short pmcr1; 1798 struct adb_request req; 1799 struct pci_dev *grackle; 1800 1801 grackle = pci_get_bus_and_slot(0, 0); 1802 if (!grackle) 1803 return -ENODEV; 1804 1805 /* Turn off various things. Darwin does some retry tests here... */ 1806 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE); 1807 pmu_wait_complete(&req); 1808 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1809 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY); 1810 pmu_wait_complete(&req); 1811 1812 /* For 750, save backside cache setting and disable it */ 1813 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 1814 1815 if (!__fake_sleep) { 1816 /* Ask the PMU to put us to sleep */ 1817 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1818 pmu_wait_complete(&req); 1819 } 1820 1821 /* The VIA is supposed not to be restored correctly*/ 1822 save_via_state(); 1823 /* We shut down some HW */ 1824 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 1825 1826 pci_read_config_word(grackle, 0x70, &pmcr1); 1827 /* Apparently, MacOS uses NAP mode for Grackle ??? */ 1828 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 1829 pmcr1 |= GRACKLE_PM|GRACKLE_NAP; 1830 pci_write_config_word(grackle, 0x70, pmcr1); 1831 1832 /* Call low-level ASM sleep handler */ 1833 if (__fake_sleep) 1834 mdelay(5000); 1835 else 1836 low_sleep_handler(); 1837 1838 /* We're awake again, stop grackle PM */ 1839 pci_read_config_word(grackle, 0x70, &pmcr1); 1840 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 1841 pci_write_config_word(grackle, 0x70, pmcr1); 1842 1843 pci_dev_put(grackle); 1844 1845 /* Make sure the PMU is idle */ 1846 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 1847 restore_via_state(); 1848 1849 /* Restore L2 cache */ 1850 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 1851 _set_L2CR(save_l2cr); 1852 1853 /* Restore userland MMU context */ 1854 switch_mmu_context(NULL, current->active_mm, NULL); 1855 1856 /* Power things up */ 1857 pmu_unlock(); 1858 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1859 pmu_wait_complete(&req); 1860 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, 1861 PMU_POW0_ON|PMU_POW0_HARD_DRIVE); 1862 pmu_wait_complete(&req); 1863 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1864 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY); 1865 pmu_wait_complete(&req); 1866 1867 return 0; 1868 } 1869 1870 static int 1871 powerbook_sleep_Core99(void) 1872 { 1873 unsigned long save_l2cr; 1874 unsigned long save_l3cr; 1875 struct adb_request req; 1876 1877 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) { 1878 printk(KERN_ERR "Sleep mode not supported on this machine\n"); 1879 return -ENOSYS; 1880 } 1881 1882 if (num_online_cpus() > 1 || cpu_is_offline(0)) 1883 return -EAGAIN; 1884 1885 /* Stop environment and ADB interrupts */ 1886 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 1887 pmu_wait_complete(&req); 1888 1889 /* Tell PMU what events will wake us up */ 1890 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS, 1891 0xff, 0xff); 1892 pmu_wait_complete(&req); 1893 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS, 1894 0, PMU_PWR_WAKEUP_KEY | 1895 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0)); 1896 pmu_wait_complete(&req); 1897 1898 /* Save the state of the L2 and L3 caches */ 1899 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */ 1900 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 1901 1902 if (!__fake_sleep) { 1903 /* Ask the PMU to put us to sleep */ 1904 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1905 pmu_wait_complete(&req); 1906 } 1907 1908 /* The VIA is supposed not to be restored correctly*/ 1909 save_via_state(); 1910 1911 /* Shut down various ASICs. There's a chance that we can no longer 1912 * talk to the PMU after this, so I moved it to _after_ sending the 1913 * sleep command to it. Still need to be checked. 1914 */ 1915 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 1916 1917 /* Call low-level ASM sleep handler */ 1918 if (__fake_sleep) 1919 mdelay(5000); 1920 else 1921 low_sleep_handler(); 1922 1923 /* Restore Apple core ASICs state */ 1924 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 1925 1926 /* Restore VIA */ 1927 restore_via_state(); 1928 1929 /* tweak LPJ before cpufreq is there */ 1930 loops_per_jiffy *= 2; 1931 1932 /* Restore video */ 1933 pmac_call_early_video_resume(); 1934 1935 /* Restore L2 cache */ 1936 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 1937 _set_L2CR(save_l2cr); 1938 /* Restore L3 cache */ 1939 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0) 1940 _set_L3CR(save_l3cr); 1941 1942 /* Restore userland MMU context */ 1943 switch_mmu_context(NULL, current->active_mm, NULL); 1944 1945 /* Tell PMU we are ready */ 1946 pmu_unlock(); 1947 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 1948 pmu_wait_complete(&req); 1949 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1950 pmu_wait_complete(&req); 1951 1952 /* Restore LPJ, cpufreq will adjust the cpu frequency */ 1953 loops_per_jiffy /= 2; 1954 1955 return 0; 1956 } 1957 1958 #define PB3400_MEM_CTRL 0xf8000000 1959 #define PB3400_MEM_CTRL_SLEEP 0x70 1960 1961 static void __iomem *pb3400_mem_ctrl; 1962 1963 static void powerbook_sleep_init_3400(void) 1964 { 1965 /* map in the memory controller registers */ 1966 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100); 1967 if (pb3400_mem_ctrl == NULL) 1968 printk(KERN_WARNING "ioremap failed: sleep won't be possible"); 1969 } 1970 1971 static int powerbook_sleep_3400(void) 1972 { 1973 int i, x; 1974 unsigned int hid0; 1975 unsigned long msr; 1976 struct adb_request sleep_req; 1977 unsigned int __iomem *mem_ctrl_sleep; 1978 1979 if (pb3400_mem_ctrl == NULL) 1980 return -ENOMEM; 1981 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP; 1982 1983 /* Set the memory controller to keep the memory refreshed 1984 while we're asleep */ 1985 for (i = 0x403f; i >= 0x4000; --i) { 1986 out_be32(mem_ctrl_sleep, i); 1987 do { 1988 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff; 1989 } while (x == 0); 1990 if (x >= 0x100) 1991 break; 1992 } 1993 1994 /* Ask the PMU to put us to sleep */ 1995 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1996 pmu_wait_complete(&sleep_req); 1997 pmu_unlock(); 1998 1999 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 2000 2001 asleep = 1; 2002 2003 /* Put the CPU into sleep mode */ 2004 hid0 = mfspr(SPRN_HID0); 2005 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP; 2006 mtspr(SPRN_HID0, hid0); 2007 local_irq_enable(); 2008 msr = mfmsr() | MSR_POW; 2009 while (asleep) { 2010 mb(); 2011 mtmsr(msr); 2012 isync(); 2013 } 2014 local_irq_disable(); 2015 2016 /* OK, we're awake again, start restoring things */ 2017 out_be32(mem_ctrl_sleep, 0x3f); 2018 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 2019 2020 return 0; 2021 } 2022 2023 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2024 2025 /* 2026 * Support for /dev/pmu device 2027 */ 2028 #define RB_SIZE 0x10 2029 struct pmu_private { 2030 struct list_head list; 2031 int rb_get; 2032 int rb_put; 2033 struct rb_entry { 2034 unsigned short len; 2035 unsigned char data[16]; 2036 } rb_buf[RB_SIZE]; 2037 wait_queue_head_t wait; 2038 spinlock_t lock; 2039 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2040 int backlight_locker; 2041 #endif 2042 }; 2043 2044 static LIST_HEAD(all_pmu_pvt); 2045 static DEFINE_SPINLOCK(all_pvt_lock); 2046 2047 static void 2048 pmu_pass_intr(unsigned char *data, int len) 2049 { 2050 struct pmu_private *pp; 2051 struct list_head *list; 2052 int i; 2053 unsigned long flags; 2054 2055 if (len > sizeof(pp->rb_buf[0].data)) 2056 len = sizeof(pp->rb_buf[0].data); 2057 spin_lock_irqsave(&all_pvt_lock, flags); 2058 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) { 2059 pp = list_entry(list, struct pmu_private, list); 2060 spin_lock(&pp->lock); 2061 i = pp->rb_put + 1; 2062 if (i >= RB_SIZE) 2063 i = 0; 2064 if (i != pp->rb_get) { 2065 struct rb_entry *rp = &pp->rb_buf[pp->rb_put]; 2066 rp->len = len; 2067 memcpy(rp->data, data, len); 2068 pp->rb_put = i; 2069 wake_up_interruptible(&pp->wait); 2070 } 2071 spin_unlock(&pp->lock); 2072 } 2073 spin_unlock_irqrestore(&all_pvt_lock, flags); 2074 } 2075 2076 static int 2077 pmu_open(struct inode *inode, struct file *file) 2078 { 2079 struct pmu_private *pp; 2080 unsigned long flags; 2081 2082 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL); 2083 if (pp == 0) 2084 return -ENOMEM; 2085 pp->rb_get = pp->rb_put = 0; 2086 spin_lock_init(&pp->lock); 2087 init_waitqueue_head(&pp->wait); 2088 mutex_lock(&pmu_info_proc_mutex); 2089 spin_lock_irqsave(&all_pvt_lock, flags); 2090 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2091 pp->backlight_locker = 0; 2092 #endif 2093 list_add(&pp->list, &all_pmu_pvt); 2094 spin_unlock_irqrestore(&all_pvt_lock, flags); 2095 file->private_data = pp; 2096 mutex_unlock(&pmu_info_proc_mutex); 2097 return 0; 2098 } 2099 2100 static ssize_t 2101 pmu_read(struct file *file, char __user *buf, 2102 size_t count, loff_t *ppos) 2103 { 2104 struct pmu_private *pp = file->private_data; 2105 DECLARE_WAITQUEUE(wait, current); 2106 unsigned long flags; 2107 int ret = 0; 2108 2109 if (count < 1 || pp == 0) 2110 return -EINVAL; 2111 if (!access_ok(VERIFY_WRITE, buf, count)) 2112 return -EFAULT; 2113 2114 spin_lock_irqsave(&pp->lock, flags); 2115 add_wait_queue(&pp->wait, &wait); 2116 set_current_state(TASK_INTERRUPTIBLE); 2117 2118 for (;;) { 2119 ret = -EAGAIN; 2120 if (pp->rb_get != pp->rb_put) { 2121 int i = pp->rb_get; 2122 struct rb_entry *rp = &pp->rb_buf[i]; 2123 ret = rp->len; 2124 spin_unlock_irqrestore(&pp->lock, flags); 2125 if (ret > count) 2126 ret = count; 2127 if (ret > 0 && copy_to_user(buf, rp->data, ret)) 2128 ret = -EFAULT; 2129 if (++i >= RB_SIZE) 2130 i = 0; 2131 spin_lock_irqsave(&pp->lock, flags); 2132 pp->rb_get = i; 2133 } 2134 if (ret >= 0) 2135 break; 2136 if (file->f_flags & O_NONBLOCK) 2137 break; 2138 ret = -ERESTARTSYS; 2139 if (signal_pending(current)) 2140 break; 2141 spin_unlock_irqrestore(&pp->lock, flags); 2142 schedule(); 2143 spin_lock_irqsave(&pp->lock, flags); 2144 } 2145 __set_current_state(TASK_RUNNING); 2146 remove_wait_queue(&pp->wait, &wait); 2147 spin_unlock_irqrestore(&pp->lock, flags); 2148 2149 return ret; 2150 } 2151 2152 static ssize_t 2153 pmu_write(struct file *file, const char __user *buf, 2154 size_t count, loff_t *ppos) 2155 { 2156 return 0; 2157 } 2158 2159 static unsigned int 2160 pmu_fpoll(struct file *filp, poll_table *wait) 2161 { 2162 struct pmu_private *pp = filp->private_data; 2163 unsigned int mask = 0; 2164 unsigned long flags; 2165 2166 if (pp == 0) 2167 return 0; 2168 poll_wait(filp, &pp->wait, wait); 2169 spin_lock_irqsave(&pp->lock, flags); 2170 if (pp->rb_get != pp->rb_put) 2171 mask |= POLLIN; 2172 spin_unlock_irqrestore(&pp->lock, flags); 2173 return mask; 2174 } 2175 2176 static int 2177 pmu_release(struct inode *inode, struct file *file) 2178 { 2179 struct pmu_private *pp = file->private_data; 2180 unsigned long flags; 2181 2182 if (pp != 0) { 2183 file->private_data = NULL; 2184 spin_lock_irqsave(&all_pvt_lock, flags); 2185 list_del(&pp->list); 2186 spin_unlock_irqrestore(&all_pvt_lock, flags); 2187 2188 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2189 if (pp->backlight_locker) 2190 pmac_backlight_enable(); 2191 #endif 2192 2193 kfree(pp); 2194 } 2195 return 0; 2196 } 2197 2198 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 2199 static void pmac_suspend_disable_irqs(void) 2200 { 2201 /* Call platform functions marked "on sleep" */ 2202 pmac_pfunc_i2c_suspend(); 2203 pmac_pfunc_base_suspend(); 2204 } 2205 2206 static int powerbook_sleep(suspend_state_t state) 2207 { 2208 int error = 0; 2209 2210 /* Wait for completion of async requests */ 2211 while (!batt_req.complete) 2212 pmu_poll(); 2213 2214 /* Giveup the lazy FPU & vec so we don't have to back them 2215 * up from the low level code 2216 */ 2217 enable_kernel_fp(); 2218 2219 #ifdef CONFIG_ALTIVEC 2220 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 2221 enable_kernel_altivec(); 2222 #endif /* CONFIG_ALTIVEC */ 2223 2224 switch (pmu_kind) { 2225 case PMU_OHARE_BASED: 2226 error = powerbook_sleep_3400(); 2227 break; 2228 case PMU_HEATHROW_BASED: 2229 case PMU_PADDINGTON_BASED: 2230 error = powerbook_sleep_grackle(); 2231 break; 2232 case PMU_KEYLARGO_BASED: 2233 error = powerbook_sleep_Core99(); 2234 break; 2235 default: 2236 return -ENOSYS; 2237 } 2238 2239 if (error) 2240 return error; 2241 2242 mdelay(100); 2243 2244 return 0; 2245 } 2246 2247 static void pmac_suspend_enable_irqs(void) 2248 { 2249 /* Force a poll of ADB interrupts */ 2250 adb_int_pending = 1; 2251 via_pmu_interrupt(0, NULL); 2252 2253 mdelay(10); 2254 2255 /* Call platform functions marked "on wake" */ 2256 pmac_pfunc_base_resume(); 2257 pmac_pfunc_i2c_resume(); 2258 } 2259 2260 static int pmu_sleep_valid(suspend_state_t state) 2261 { 2262 return state == PM_SUSPEND_MEM 2263 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0); 2264 } 2265 2266 static const struct platform_suspend_ops pmu_pm_ops = { 2267 .enter = powerbook_sleep, 2268 .valid = pmu_sleep_valid, 2269 }; 2270 2271 static int register_pmu_pm_ops(void) 2272 { 2273 if (pmu_kind == PMU_OHARE_BASED) 2274 powerbook_sleep_init_3400(); 2275 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs; 2276 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs; 2277 suspend_set_ops(&pmu_pm_ops); 2278 2279 return 0; 2280 } 2281 2282 device_initcall(register_pmu_pm_ops); 2283 #endif 2284 2285 static int pmu_ioctl(struct file *filp, 2286 u_int cmd, u_long arg) 2287 { 2288 __u32 __user *argp = (__u32 __user *)arg; 2289 int error = -EINVAL; 2290 2291 switch (cmd) { 2292 case PMU_IOC_SLEEP: 2293 if (!capable(CAP_SYS_ADMIN)) 2294 return -EACCES; 2295 return pm_suspend(PM_SUSPEND_MEM); 2296 case PMU_IOC_CAN_SLEEP: 2297 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0) 2298 return put_user(0, argp); 2299 else 2300 return put_user(1, argp); 2301 2302 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY 2303 /* Compatibility ioctl's for backlight */ 2304 case PMU_IOC_GET_BACKLIGHT: 2305 { 2306 int brightness; 2307 2308 brightness = pmac_backlight_get_legacy_brightness(); 2309 if (brightness < 0) 2310 return brightness; 2311 else 2312 return put_user(brightness, argp); 2313 2314 } 2315 case PMU_IOC_SET_BACKLIGHT: 2316 { 2317 int brightness; 2318 2319 error = get_user(brightness, argp); 2320 if (error) 2321 return error; 2322 2323 return pmac_backlight_set_legacy_brightness(brightness); 2324 } 2325 #ifdef CONFIG_INPUT_ADBHID 2326 case PMU_IOC_GRAB_BACKLIGHT: { 2327 struct pmu_private *pp = filp->private_data; 2328 2329 if (pp->backlight_locker) 2330 return 0; 2331 2332 pp->backlight_locker = 1; 2333 pmac_backlight_disable(); 2334 2335 return 0; 2336 } 2337 #endif /* CONFIG_INPUT_ADBHID */ 2338 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */ 2339 2340 case PMU_IOC_GET_MODEL: 2341 return put_user(pmu_kind, argp); 2342 case PMU_IOC_HAS_ADB: 2343 return put_user(pmu_has_adb, argp); 2344 } 2345 return error; 2346 } 2347 2348 static long pmu_unlocked_ioctl(struct file *filp, 2349 u_int cmd, u_long arg) 2350 { 2351 int ret; 2352 2353 mutex_lock(&pmu_info_proc_mutex); 2354 ret = pmu_ioctl(filp, cmd, arg); 2355 mutex_unlock(&pmu_info_proc_mutex); 2356 2357 return ret; 2358 } 2359 2360 #ifdef CONFIG_COMPAT 2361 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t) 2362 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t) 2363 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t) 2364 #define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t) 2365 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t) 2366 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t) 2367 2368 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg) 2369 { 2370 switch (cmd) { 2371 case PMU_IOC_SLEEP: 2372 break; 2373 case PMU_IOC_GET_BACKLIGHT32: 2374 cmd = PMU_IOC_GET_BACKLIGHT; 2375 break; 2376 case PMU_IOC_SET_BACKLIGHT32: 2377 cmd = PMU_IOC_SET_BACKLIGHT; 2378 break; 2379 case PMU_IOC_GET_MODEL32: 2380 cmd = PMU_IOC_GET_MODEL; 2381 break; 2382 case PMU_IOC_HAS_ADB32: 2383 cmd = PMU_IOC_HAS_ADB; 2384 break; 2385 case PMU_IOC_CAN_SLEEP32: 2386 cmd = PMU_IOC_CAN_SLEEP; 2387 break; 2388 case PMU_IOC_GRAB_BACKLIGHT32: 2389 cmd = PMU_IOC_GRAB_BACKLIGHT; 2390 break; 2391 default: 2392 return -ENOIOCTLCMD; 2393 } 2394 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); 2395 } 2396 #endif 2397 2398 static const struct file_operations pmu_device_fops = { 2399 .read = pmu_read, 2400 .write = pmu_write, 2401 .poll = pmu_fpoll, 2402 .unlocked_ioctl = pmu_unlocked_ioctl, 2403 #ifdef CONFIG_COMPAT 2404 .compat_ioctl = compat_pmu_ioctl, 2405 #endif 2406 .open = pmu_open, 2407 .release = pmu_release, 2408 .llseek = noop_llseek, 2409 }; 2410 2411 static struct miscdevice pmu_device = { 2412 PMU_MINOR, "pmu", &pmu_device_fops 2413 }; 2414 2415 static int pmu_device_init(void) 2416 { 2417 if (!via) 2418 return 0; 2419 if (misc_register(&pmu_device) < 0) 2420 printk(KERN_ERR "via-pmu: cannot register misc device.\n"); 2421 return 0; 2422 } 2423 device_initcall(pmu_device_init); 2424 2425 2426 #ifdef DEBUG_SLEEP 2427 static inline void 2428 polled_handshake(volatile unsigned char __iomem *via) 2429 { 2430 via[B] &= ~TREQ; eieio(); 2431 while ((via[B] & TACK) != 0) 2432 ; 2433 via[B] |= TREQ; eieio(); 2434 while ((via[B] & TACK) == 0) 2435 ; 2436 } 2437 2438 static inline void 2439 polled_send_byte(volatile unsigned char __iomem *via, int x) 2440 { 2441 via[ACR] |= SR_OUT | SR_EXT; eieio(); 2442 via[SR] = x; eieio(); 2443 polled_handshake(via); 2444 } 2445 2446 static inline int 2447 polled_recv_byte(volatile unsigned char __iomem *via) 2448 { 2449 int x; 2450 2451 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio(); 2452 x = via[SR]; eieio(); 2453 polled_handshake(via); 2454 x = via[SR]; eieio(); 2455 return x; 2456 } 2457 2458 int 2459 pmu_polled_request(struct adb_request *req) 2460 { 2461 unsigned long flags; 2462 int i, l, c; 2463 volatile unsigned char __iomem *v = via; 2464 2465 req->complete = 1; 2466 c = req->data[0]; 2467 l = pmu_data_len[c][0]; 2468 if (l >= 0 && req->nbytes != l + 1) 2469 return -EINVAL; 2470 2471 local_irq_save(flags); 2472 while (pmu_state != idle) 2473 pmu_poll(); 2474 2475 while ((via[B] & TACK) == 0) 2476 ; 2477 polled_send_byte(v, c); 2478 if (l < 0) { 2479 l = req->nbytes - 1; 2480 polled_send_byte(v, l); 2481 } 2482 for (i = 1; i <= l; ++i) 2483 polled_send_byte(v, req->data[i]); 2484 2485 l = pmu_data_len[c][1]; 2486 if (l < 0) 2487 l = polled_recv_byte(v); 2488 for (i = 0; i < l; ++i) 2489 req->reply[i + req->reply_len] = polled_recv_byte(v); 2490 2491 if (req->done) 2492 (*req->done)(req); 2493 2494 local_irq_restore(flags); 2495 return 0; 2496 } 2497 2498 /* N.B. This doesn't work on the 3400 */ 2499 void pmu_blink(int n) 2500 { 2501 struct adb_request req; 2502 2503 memset(&req, 0, sizeof(req)); 2504 2505 for (; n > 0; --n) { 2506 req.nbytes = 4; 2507 req.done = NULL; 2508 req.data[0] = 0xee; 2509 req.data[1] = 4; 2510 req.data[2] = 0; 2511 req.data[3] = 1; 2512 req.reply[0] = ADB_RET_OK; 2513 req.reply_len = 1; 2514 req.reply_expected = 0; 2515 pmu_polled_request(&req); 2516 mdelay(50); 2517 req.nbytes = 4; 2518 req.done = NULL; 2519 req.data[0] = 0xee; 2520 req.data[1] = 4; 2521 req.data[2] = 0; 2522 req.data[3] = 0; 2523 req.reply[0] = ADB_RET_OK; 2524 req.reply_len = 1; 2525 req.reply_expected = 0; 2526 pmu_polled_request(&req); 2527 mdelay(50); 2528 } 2529 mdelay(50); 2530 } 2531 #endif /* DEBUG_SLEEP */ 2532 2533 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 2534 int pmu_sys_suspended; 2535 2536 static int pmu_syscore_suspend(void) 2537 { 2538 /* Suspend PMU event interrupts */ 2539 pmu_suspend(); 2540 pmu_sys_suspended = 1; 2541 2542 #ifdef CONFIG_PMAC_BACKLIGHT 2543 /* Tell backlight code not to muck around with the chip anymore */ 2544 pmu_backlight_set_sleep(1); 2545 #endif 2546 2547 return 0; 2548 } 2549 2550 static void pmu_syscore_resume(void) 2551 { 2552 struct adb_request req; 2553 2554 if (!pmu_sys_suspended) 2555 return; 2556 2557 /* Tell PMU we are ready */ 2558 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2559 pmu_wait_complete(&req); 2560 2561 #ifdef CONFIG_PMAC_BACKLIGHT 2562 /* Tell backlight code it can use the chip again */ 2563 pmu_backlight_set_sleep(0); 2564 #endif 2565 /* Resume PMU event interrupts */ 2566 pmu_resume(); 2567 pmu_sys_suspended = 0; 2568 } 2569 2570 static struct syscore_ops pmu_syscore_ops = { 2571 .suspend = pmu_syscore_suspend, 2572 .resume = pmu_syscore_resume, 2573 }; 2574 2575 static int pmu_syscore_register(void) 2576 { 2577 register_syscore_ops(&pmu_syscore_ops); 2578 2579 return 0; 2580 } 2581 subsys_initcall(pmu_syscore_register); 2582 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2583 2584 EXPORT_SYMBOL(pmu_request); 2585 EXPORT_SYMBOL(pmu_queue_request); 2586 EXPORT_SYMBOL(pmu_poll); 2587 EXPORT_SYMBOL(pmu_poll_adb); 2588 EXPORT_SYMBOL(pmu_wait_complete); 2589 EXPORT_SYMBOL(pmu_suspend); 2590 EXPORT_SYMBOL(pmu_resume); 2591 EXPORT_SYMBOL(pmu_unlock); 2592 #if defined(CONFIG_PPC32) 2593 EXPORT_SYMBOL(pmu_enable_irled); 2594 EXPORT_SYMBOL(pmu_battery_count); 2595 EXPORT_SYMBOL(pmu_batteries); 2596 EXPORT_SYMBOL(pmu_power_flags); 2597 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2598 2599