1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Device driver for the via-pmu on Apple Powermacs. 4 * 5 * The VIA (versatile interface adapter) interfaces to the PMU, 6 * a 6805 microprocessor core whose primary function is to control 7 * battery charging and system power on the PowerBook 3400 and 2400. 8 * The PMU also controls the ADB (Apple Desktop Bus) which connects 9 * to the keyboard and mouse, as well as the non-volatile RAM 10 * and the RTC (real time clock) chip. 11 * 12 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi. 13 * Copyright (C) 2001-2002 Benjamin Herrenschmidt 14 * Copyright (C) 2006-2007 Johannes Berg 15 * 16 * THIS DRIVER IS BECOMING A TOTAL MESS ! 17 * - Cleanup atomically disabling reply to PMU events after 18 * a sleep or a freq. switch 19 * 20 */ 21 #include <stdarg.h> 22 #include <linux/mutex.h> 23 #include <linux/types.h> 24 #include <linux/errno.h> 25 #include <linux/kernel.h> 26 #include <linux/delay.h> 27 #include <linux/sched/signal.h> 28 #include <linux/miscdevice.h> 29 #include <linux/blkdev.h> 30 #include <linux/pci.h> 31 #include <linux/slab.h> 32 #include <linux/poll.h> 33 #include <linux/adb.h> 34 #include <linux/pmu.h> 35 #include <linux/cuda.h> 36 #include <linux/module.h> 37 #include <linux/spinlock.h> 38 #include <linux/pm.h> 39 #include <linux/proc_fs.h> 40 #include <linux/seq_file.h> 41 #include <linux/init.h> 42 #include <linux/interrupt.h> 43 #include <linux/device.h> 44 #include <linux/syscore_ops.h> 45 #include <linux/freezer.h> 46 #include <linux/syscalls.h> 47 #include <linux/suspend.h> 48 #include <linux/cpu.h> 49 #include <linux/compat.h> 50 #include <linux/of_address.h> 51 #include <linux/of_irq.h> 52 #include <asm/prom.h> 53 #include <asm/machdep.h> 54 #include <asm/io.h> 55 #include <asm/pgtable.h> 56 #include <asm/sections.h> 57 #include <asm/irq.h> 58 #include <asm/pmac_feature.h> 59 #include <asm/pmac_pfunc.h> 60 #include <asm/pmac_low_i2c.h> 61 #include <linux/uaccess.h> 62 #include <asm/mmu_context.h> 63 #include <asm/cputable.h> 64 #include <asm/time.h> 65 #include <asm/backlight.h> 66 67 #include "via-pmu-event.h" 68 69 /* Some compile options */ 70 #undef DEBUG_SLEEP 71 72 /* Misc minor number allocated for /dev/pmu */ 73 #define PMU_MINOR 154 74 75 /* How many iterations between battery polls */ 76 #define BATTERY_POLLING_COUNT 2 77 78 static DEFINE_MUTEX(pmu_info_proc_mutex); 79 static volatile unsigned char __iomem *via; 80 81 /* VIA registers - spaced 0x200 bytes apart */ 82 #define RS 0x200 /* skip between registers */ 83 #define B 0 /* B-side data */ 84 #define A RS /* A-side data */ 85 #define DIRB (2*RS) /* B-side direction (1=output) */ 86 #define DIRA (3*RS) /* A-side direction (1=output) */ 87 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */ 88 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */ 89 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */ 90 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */ 91 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */ 92 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */ 93 #define SR (10*RS) /* Shift register */ 94 #define ACR (11*RS) /* Auxiliary control register */ 95 #define PCR (12*RS) /* Peripheral control register */ 96 #define IFR (13*RS) /* Interrupt flag register */ 97 #define IER (14*RS) /* Interrupt enable register */ 98 #define ANH (15*RS) /* A-side data, no handshake */ 99 100 /* Bits in B data register: both active low */ 101 #define TACK 0x08 /* Transfer acknowledge (input) */ 102 #define TREQ 0x10 /* Transfer request (output) */ 103 104 /* Bits in ACR */ 105 #define SR_CTRL 0x1c /* Shift register control bits */ 106 #define SR_EXT 0x0c /* Shift on external clock */ 107 #define SR_OUT 0x10 /* Shift out if 1 */ 108 109 /* Bits in IFR and IER */ 110 #define IER_SET 0x80 /* set bits in IER */ 111 #define IER_CLR 0 /* clear bits in IER */ 112 #define SR_INT 0x04 /* Shift register full/empty */ 113 #define CB2_INT 0x08 114 #define CB1_INT 0x10 /* transition on CB1 input */ 115 116 static volatile enum pmu_state { 117 idle, 118 sending, 119 intack, 120 reading, 121 reading_intr, 122 locked, 123 } pmu_state; 124 125 static volatile enum int_data_state { 126 int_data_empty, 127 int_data_fill, 128 int_data_ready, 129 int_data_flush 130 } int_data_state[2] = { int_data_empty, int_data_empty }; 131 132 static struct adb_request *current_req; 133 static struct adb_request *last_req; 134 static struct adb_request *req_awaiting_reply; 135 static unsigned char interrupt_data[2][32]; 136 static int interrupt_data_len[2]; 137 static int int_data_last; 138 static unsigned char *reply_ptr; 139 static int data_index; 140 static int data_len; 141 static volatile int adb_int_pending; 142 static volatile int disable_poll; 143 static struct device_node *vias; 144 static int pmu_kind = PMU_UNKNOWN; 145 static int pmu_fully_inited; 146 static int pmu_has_adb; 147 static struct device_node *gpio_node; 148 static unsigned char __iomem *gpio_reg; 149 static int gpio_irq = 0; 150 static int gpio_irq_enabled = -1; 151 static volatile int pmu_suspended; 152 static spinlock_t pmu_lock; 153 static u8 pmu_intr_mask; 154 static int pmu_version; 155 static int drop_interrupts; 156 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 157 static int option_lid_wakeup = 1; 158 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 159 static unsigned long async_req_locks; 160 static unsigned int pmu_irq_stats[11]; 161 162 static struct proc_dir_entry *proc_pmu_root; 163 static struct proc_dir_entry *proc_pmu_info; 164 static struct proc_dir_entry *proc_pmu_irqstats; 165 static struct proc_dir_entry *proc_pmu_options; 166 static int option_server_mode; 167 168 int pmu_battery_count; 169 int pmu_cur_battery; 170 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT; 171 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES]; 172 static int query_batt_timer = BATTERY_POLLING_COUNT; 173 static struct adb_request batt_req; 174 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES]; 175 176 int __fake_sleep; 177 int asleep; 178 179 #ifdef CONFIG_ADB 180 static int adb_dev_map; 181 static int pmu_adb_flags; 182 183 static int pmu_probe(void); 184 static int pmu_init(void); 185 static int pmu_send_request(struct adb_request *req, int sync); 186 static int pmu_adb_autopoll(int devs); 187 static int pmu_adb_reset_bus(void); 188 #endif /* CONFIG_ADB */ 189 190 static int init_pmu(void); 191 static void pmu_start(void); 192 static irqreturn_t via_pmu_interrupt(int irq, void *arg); 193 static irqreturn_t gpio1_interrupt(int irq, void *arg); 194 static const struct file_operations pmu_info_proc_fops; 195 static const struct file_operations pmu_irqstats_proc_fops; 196 static void pmu_pass_intr(unsigned char *data, int len); 197 static const struct file_operations pmu_battery_proc_fops; 198 static const struct file_operations pmu_options_proc_fops; 199 200 #ifdef CONFIG_ADB 201 struct adb_driver via_pmu_driver = { 202 "PMU", 203 pmu_probe, 204 pmu_init, 205 pmu_send_request, 206 pmu_adb_autopoll, 207 pmu_poll_adb, 208 pmu_adb_reset_bus 209 }; 210 #endif /* CONFIG_ADB */ 211 212 extern void low_sleep_handler(void); 213 extern void enable_kernel_altivec(void); 214 extern void enable_kernel_fp(void); 215 216 #ifdef DEBUG_SLEEP 217 int pmu_polled_request(struct adb_request *req); 218 void pmu_blink(int n); 219 #endif 220 221 /* 222 * This table indicates for each PMU opcode: 223 * - the number of data bytes to be sent with the command, or -1 224 * if a length byte should be sent, 225 * - the number of response bytes which the PMU will return, or 226 * -1 if it will send a length byte. 227 */ 228 static const s8 pmu_data_len[256][2] = { 229 /* 0 1 2 3 4 5 6 7 */ 230 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 231 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 232 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 233 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0}, 234 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0}, 235 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1}, 236 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 237 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0}, 238 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 239 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1}, 240 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0}, 241 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1}, 242 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 243 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1}, 244 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 245 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1}, 246 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 247 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 248 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 249 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 250 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0}, 251 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 252 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 253 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 254 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 255 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 256 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 257 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1}, 258 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0}, 259 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0}, 260 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 261 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 262 }; 263 264 static char *pbook_type[] = { 265 "Unknown PowerBook", 266 "PowerBook 2400/3400/3500(G3)", 267 "PowerBook G3 Series", 268 "1999 PowerBook G3", 269 "Core99" 270 }; 271 272 int __init find_via_pmu(void) 273 { 274 u64 taddr; 275 const u32 *reg; 276 277 if (via != 0) 278 return 1; 279 vias = of_find_node_by_name(NULL, "via-pmu"); 280 if (vias == NULL) 281 return 0; 282 283 reg = of_get_property(vias, "reg", NULL); 284 if (reg == NULL) { 285 printk(KERN_ERR "via-pmu: No \"reg\" property !\n"); 286 goto fail; 287 } 288 taddr = of_translate_address(vias, reg); 289 if (taddr == OF_BAD_ADDR) { 290 printk(KERN_ERR "via-pmu: Can't translate address !\n"); 291 goto fail; 292 } 293 294 spin_lock_init(&pmu_lock); 295 296 pmu_has_adb = 1; 297 298 pmu_intr_mask = PMU_INT_PCEJECT | 299 PMU_INT_SNDBRT | 300 PMU_INT_ADB | 301 PMU_INT_TICK; 302 303 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0) 304 || of_device_is_compatible(vias->parent, "ohare"))) 305 pmu_kind = PMU_OHARE_BASED; 306 else if (of_device_is_compatible(vias->parent, "paddington")) 307 pmu_kind = PMU_PADDINGTON_BASED; 308 else if (of_device_is_compatible(vias->parent, "heathrow")) 309 pmu_kind = PMU_HEATHROW_BASED; 310 else if (of_device_is_compatible(vias->parent, "Keylargo") 311 || of_device_is_compatible(vias->parent, "K2-Keylargo")) { 312 struct device_node *gpiop; 313 struct device_node *adbp; 314 u64 gaddr = OF_BAD_ADDR; 315 316 pmu_kind = PMU_KEYLARGO_BASED; 317 adbp = of_find_node_by_type(NULL, "adb"); 318 pmu_has_adb = (adbp != NULL); 319 of_node_put(adbp); 320 pmu_intr_mask = PMU_INT_PCEJECT | 321 PMU_INT_SNDBRT | 322 PMU_INT_ADB | 323 PMU_INT_TICK | 324 PMU_INT_ENVIRONMENT; 325 326 gpiop = of_find_node_by_name(NULL, "gpio"); 327 if (gpiop) { 328 reg = of_get_property(gpiop, "reg", NULL); 329 if (reg) 330 gaddr = of_translate_address(gpiop, reg); 331 if (gaddr != OF_BAD_ADDR) 332 gpio_reg = ioremap(gaddr, 0x10); 333 of_node_put(gpiop); 334 } 335 if (gpio_reg == NULL) { 336 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n"); 337 goto fail; 338 } 339 } else 340 pmu_kind = PMU_UNKNOWN; 341 342 via = ioremap(taddr, 0x2000); 343 if (via == NULL) { 344 printk(KERN_ERR "via-pmu: Can't map address !\n"); 345 goto fail_via_remap; 346 } 347 348 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 349 out_8(&via[IFR], 0x7f); /* clear IFR */ 350 351 pmu_state = idle; 352 353 if (!init_pmu()) 354 goto fail_init; 355 356 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n", 357 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version); 358 359 sys_ctrler = SYS_CTRLER_PMU; 360 361 return 1; 362 363 fail_init: 364 iounmap(via); 365 via = NULL; 366 fail_via_remap: 367 iounmap(gpio_reg); 368 gpio_reg = NULL; 369 fail: 370 of_node_put(vias); 371 vias = NULL; 372 return 0; 373 } 374 375 #ifdef CONFIG_ADB 376 static int pmu_probe(void) 377 { 378 return vias == NULL? -ENODEV: 0; 379 } 380 381 static int __init pmu_init(void) 382 { 383 if (vias == NULL) 384 return -ENODEV; 385 return 0; 386 } 387 #endif /* CONFIG_ADB */ 388 389 /* 390 * We can't wait until pmu_init gets called, that happens too late. 391 * It happens after IDE and SCSI initialization, which can take a few 392 * seconds, and by that time the PMU could have given up on us and 393 * turned us off. 394 * Thus this is called with arch_initcall rather than device_initcall. 395 */ 396 static int __init via_pmu_start(void) 397 { 398 unsigned int irq; 399 400 if (vias == NULL) 401 return -ENODEV; 402 403 batt_req.complete = 1; 404 405 irq = irq_of_parse_and_map(vias, 0); 406 if (!irq) { 407 printk(KERN_ERR "via-pmu: can't map interrupt\n"); 408 return -ENODEV; 409 } 410 /* We set IRQF_NO_SUSPEND because we don't want the interrupt 411 * to be disabled between the 2 passes of driver suspend, we 412 * control our own disabling for that one 413 */ 414 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND, 415 "VIA-PMU", (void *)0)) { 416 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq); 417 return -ENODEV; 418 } 419 420 if (pmu_kind == PMU_KEYLARGO_BASED) { 421 gpio_node = of_find_node_by_name(NULL, "extint-gpio1"); 422 if (gpio_node == NULL) 423 gpio_node = of_find_node_by_name(NULL, 424 "pmu-interrupt"); 425 if (gpio_node) 426 gpio_irq = irq_of_parse_and_map(gpio_node, 0); 427 428 if (gpio_irq) { 429 if (request_irq(gpio_irq, gpio1_interrupt, 430 IRQF_NO_SUSPEND, "GPIO1 ADB", 431 (void *)0)) 432 printk(KERN_ERR "pmu: can't get irq %d" 433 " (GPIO1)\n", gpio_irq); 434 else 435 gpio_irq_enabled = 1; 436 } 437 } 438 439 /* Enable interrupts */ 440 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 441 442 pmu_fully_inited = 1; 443 444 /* Make sure PMU settle down before continuing. This is _very_ important 445 * since the IDE probe may shut interrupts down for quite a bit of time. If 446 * a PMU communication is pending while this happens, the PMU may timeout 447 * Not that on Core99 machines, the PMU keeps sending us environement 448 * messages, we should find a way to either fix IDE or make it call 449 * pmu_suspend() before masking interrupts. This can also happens while 450 * scolling with some fbdevs. 451 */ 452 do { 453 pmu_poll(); 454 } while (pmu_state != idle); 455 456 return 0; 457 } 458 459 arch_initcall(via_pmu_start); 460 461 /* 462 * This has to be done after pci_init, which is a subsys_initcall. 463 */ 464 static int __init via_pmu_dev_init(void) 465 { 466 if (vias == NULL) 467 return -ENODEV; 468 469 #ifdef CONFIG_PMAC_BACKLIGHT 470 /* Initialize backlight */ 471 pmu_backlight_init(); 472 #endif 473 474 #ifdef CONFIG_PPC32 475 if (of_machine_is_compatible("AAPL,3400/2400") || 476 of_machine_is_compatible("AAPL,3500")) { 477 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 478 NULL, PMAC_MB_INFO_MODEL, 0); 479 pmu_battery_count = 1; 480 if (mb == PMAC_TYPE_COMET) 481 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET; 482 else 483 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER; 484 } else if (of_machine_is_compatible("AAPL,PowerBook1998") || 485 of_machine_is_compatible("PowerBook1,1")) { 486 pmu_battery_count = 2; 487 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 488 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 489 } else { 490 struct device_node* prim = 491 of_find_node_by_name(NULL, "power-mgt"); 492 const u32 *prim_info = NULL; 493 if (prim) 494 prim_info = of_get_property(prim, "prim-info", NULL); 495 if (prim_info) { 496 /* Other stuffs here yet unknown */ 497 pmu_battery_count = (prim_info[6] >> 16) & 0xff; 498 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 499 if (pmu_battery_count > 1) 500 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 501 } 502 of_node_put(prim); 503 } 504 #endif /* CONFIG_PPC32 */ 505 506 /* Create /proc/pmu */ 507 proc_pmu_root = proc_mkdir("pmu", NULL); 508 if (proc_pmu_root) { 509 long i; 510 511 for (i=0; i<pmu_battery_count; i++) { 512 char title[16]; 513 sprintf(title, "battery_%ld", i); 514 proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root, 515 &pmu_battery_proc_fops, (void *)i); 516 } 517 518 proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops); 519 proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root, 520 &pmu_irqstats_proc_fops); 521 proc_pmu_options = proc_create("options", 0600, proc_pmu_root, 522 &pmu_options_proc_fops); 523 } 524 return 0; 525 } 526 527 device_initcall(via_pmu_dev_init); 528 529 static int 530 init_pmu(void) 531 { 532 int timeout; 533 struct adb_request req; 534 535 out_8(&via[B], via[B] | TREQ); /* negate TREQ */ 536 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */ 537 538 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 539 timeout = 100000; 540 while (!req.complete) { 541 if (--timeout < 0) { 542 printk(KERN_ERR "init_pmu: no response from PMU\n"); 543 return 0; 544 } 545 udelay(10); 546 pmu_poll(); 547 } 548 549 /* ack all pending interrupts */ 550 timeout = 100000; 551 interrupt_data[0][0] = 1; 552 while (interrupt_data[0][0] || pmu_state != idle) { 553 if (--timeout < 0) { 554 printk(KERN_ERR "init_pmu: timed out acking intrs\n"); 555 return 0; 556 } 557 if (pmu_state == idle) 558 adb_int_pending = 1; 559 via_pmu_interrupt(0, NULL); 560 udelay(10); 561 } 562 563 /* Tell PMU we are ready. */ 564 if (pmu_kind == PMU_KEYLARGO_BASED) { 565 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 566 while (!req.complete) 567 pmu_poll(); 568 } 569 570 /* Read PMU version */ 571 pmu_request(&req, NULL, 1, PMU_GET_VERSION); 572 pmu_wait_complete(&req); 573 if (req.reply_len > 0) 574 pmu_version = req.reply[0]; 575 576 /* Read server mode setting */ 577 if (pmu_kind == PMU_KEYLARGO_BASED) { 578 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, 579 PMU_PWR_GET_POWERUP_EVENTS); 580 pmu_wait_complete(&req); 581 if (req.reply_len == 2) { 582 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT) 583 option_server_mode = 1; 584 printk(KERN_INFO "via-pmu: Server Mode is %s\n", 585 option_server_mode ? "enabled" : "disabled"); 586 } 587 } 588 return 1; 589 } 590 591 int 592 pmu_get_model(void) 593 { 594 return pmu_kind; 595 } 596 597 static void pmu_set_server_mode(int server_mode) 598 { 599 struct adb_request req; 600 601 if (pmu_kind != PMU_KEYLARGO_BASED) 602 return; 603 604 option_server_mode = server_mode; 605 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS); 606 pmu_wait_complete(&req); 607 if (req.reply_len < 2) 608 return; 609 if (server_mode) 610 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 611 PMU_PWR_SET_POWERUP_EVENTS, 612 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 613 else 614 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 615 PMU_PWR_CLR_POWERUP_EVENTS, 616 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 617 pmu_wait_complete(&req); 618 } 619 620 /* This new version of the code for 2400/3400/3500 powerbooks 621 * is inspired from the implementation in gkrellm-pmu 622 */ 623 static void 624 done_battery_state_ohare(struct adb_request* req) 625 { 626 /* format: 627 * [0] : flags 628 * 0x01 : AC indicator 629 * 0x02 : charging 630 * 0x04 : battery exist 631 * 0x08 : 632 * 0x10 : 633 * 0x20 : full charged 634 * 0x40 : pcharge reset 635 * 0x80 : battery exist 636 * 637 * [1][2] : battery voltage 638 * [3] : CPU temperature 639 * [4] : battery temperature 640 * [5] : current 641 * [6][7] : pcharge 642 * --tkoba 643 */ 644 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER; 645 long pcharge, charge, vb, vmax, lmax; 646 long vmax_charging, vmax_charged; 647 long amperage, voltage, time, max; 648 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 649 NULL, PMAC_MB_INFO_MODEL, 0); 650 651 if (req->reply[0] & 0x01) 652 pmu_power_flags |= PMU_PWR_AC_PRESENT; 653 else 654 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 655 656 if (mb == PMAC_TYPE_COMET) { 657 vmax_charged = 189; 658 vmax_charging = 213; 659 lmax = 6500; 660 } else { 661 vmax_charged = 330; 662 vmax_charging = 330; 663 lmax = 6500; 664 } 665 vmax = vmax_charged; 666 667 /* If battery installed */ 668 if (req->reply[0] & 0x04) { 669 bat_flags |= PMU_BATT_PRESENT; 670 if (req->reply[0] & 0x02) 671 bat_flags |= PMU_BATT_CHARGING; 672 vb = (req->reply[1] << 8) | req->reply[2]; 673 voltage = (vb * 265 + 72665) / 10; 674 amperage = req->reply[5]; 675 if ((req->reply[0] & 0x01) == 0) { 676 if (amperage > 200) 677 vb += ((amperage - 200) * 15)/100; 678 } else if (req->reply[0] & 0x02) { 679 vb = (vb * 97) / 100; 680 vmax = vmax_charging; 681 } 682 charge = (100 * vb) / vmax; 683 if (req->reply[0] & 0x40) { 684 pcharge = (req->reply[6] << 8) + req->reply[7]; 685 if (pcharge > lmax) 686 pcharge = lmax; 687 pcharge *= 100; 688 pcharge = 100 - pcharge / lmax; 689 if (pcharge < charge) 690 charge = pcharge; 691 } 692 if (amperage > 0) 693 time = (charge * 16440) / amperage; 694 else 695 time = 0; 696 max = 100; 697 amperage = -amperage; 698 } else 699 charge = max = amperage = voltage = time = 0; 700 701 pmu_batteries[pmu_cur_battery].flags = bat_flags; 702 pmu_batteries[pmu_cur_battery].charge = charge; 703 pmu_batteries[pmu_cur_battery].max_charge = max; 704 pmu_batteries[pmu_cur_battery].amperage = amperage; 705 pmu_batteries[pmu_cur_battery].voltage = voltage; 706 pmu_batteries[pmu_cur_battery].time_remaining = time; 707 708 clear_bit(0, &async_req_locks); 709 } 710 711 static void 712 done_battery_state_smart(struct adb_request* req) 713 { 714 /* format: 715 * [0] : format of this structure (known: 3,4,5) 716 * [1] : flags 717 * 718 * format 3 & 4: 719 * 720 * [2] : charge 721 * [3] : max charge 722 * [4] : current 723 * [5] : voltage 724 * 725 * format 5: 726 * 727 * [2][3] : charge 728 * [4][5] : max charge 729 * [6][7] : current 730 * [8][9] : voltage 731 */ 732 733 unsigned int bat_flags = PMU_BATT_TYPE_SMART; 734 int amperage; 735 unsigned int capa, max, voltage; 736 737 if (req->reply[1] & 0x01) 738 pmu_power_flags |= PMU_PWR_AC_PRESENT; 739 else 740 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 741 742 743 capa = max = amperage = voltage = 0; 744 745 if (req->reply[1] & 0x04) { 746 bat_flags |= PMU_BATT_PRESENT; 747 switch(req->reply[0]) { 748 case 3: 749 case 4: capa = req->reply[2]; 750 max = req->reply[3]; 751 amperage = *((signed char *)&req->reply[4]); 752 voltage = req->reply[5]; 753 break; 754 case 5: capa = (req->reply[2] << 8) | req->reply[3]; 755 max = (req->reply[4] << 8) | req->reply[5]; 756 amperage = *((signed short *)&req->reply[6]); 757 voltage = (req->reply[8] << 8) | req->reply[9]; 758 break; 759 default: 760 pr_warn("pmu.c: unrecognized battery info, " 761 "len: %d, %4ph\n", req->reply_len, 762 req->reply); 763 break; 764 } 765 } 766 767 if ((req->reply[1] & 0x01) && (amperage > 0)) 768 bat_flags |= PMU_BATT_CHARGING; 769 770 pmu_batteries[pmu_cur_battery].flags = bat_flags; 771 pmu_batteries[pmu_cur_battery].charge = capa; 772 pmu_batteries[pmu_cur_battery].max_charge = max; 773 pmu_batteries[pmu_cur_battery].amperage = amperage; 774 pmu_batteries[pmu_cur_battery].voltage = voltage; 775 if (amperage) { 776 if ((req->reply[1] & 0x01) && (amperage > 0)) 777 pmu_batteries[pmu_cur_battery].time_remaining 778 = ((max-capa) * 3600) / amperage; 779 else 780 pmu_batteries[pmu_cur_battery].time_remaining 781 = (capa * 3600) / (-amperage); 782 } else 783 pmu_batteries[pmu_cur_battery].time_remaining = 0; 784 785 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count; 786 787 clear_bit(0, &async_req_locks); 788 } 789 790 static void 791 query_battery_state(void) 792 { 793 if (test_and_set_bit(0, &async_req_locks)) 794 return; 795 if (pmu_kind == PMU_OHARE_BASED) 796 pmu_request(&batt_req, done_battery_state_ohare, 797 1, PMU_BATTERY_STATE); 798 else 799 pmu_request(&batt_req, done_battery_state_smart, 800 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1); 801 } 802 803 static int pmu_info_proc_show(struct seq_file *m, void *v) 804 { 805 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION); 806 seq_printf(m, "PMU firmware version : %02x\n", pmu_version); 807 seq_printf(m, "AC Power : %d\n", 808 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0); 809 seq_printf(m, "Battery count : %d\n", pmu_battery_count); 810 811 return 0; 812 } 813 814 static int pmu_info_proc_open(struct inode *inode, struct file *file) 815 { 816 return single_open(file, pmu_info_proc_show, NULL); 817 } 818 819 static const struct file_operations pmu_info_proc_fops = { 820 .owner = THIS_MODULE, 821 .open = pmu_info_proc_open, 822 .read = seq_read, 823 .llseek = seq_lseek, 824 .release = single_release, 825 }; 826 827 static int pmu_irqstats_proc_show(struct seq_file *m, void *v) 828 { 829 int i; 830 static const char *irq_names[] = { 831 "Total CB1 triggered events", 832 "Total GPIO1 triggered events", 833 "PC-Card eject button", 834 "Sound/Brightness button", 835 "ADB message", 836 "Battery state change", 837 "Environment interrupt", 838 "Tick timer", 839 "Ghost interrupt (zero len)", 840 "Empty interrupt (empty mask)", 841 "Max irqs in a row" 842 }; 843 844 for (i=0; i<11; i++) { 845 seq_printf(m, " %2u: %10u (%s)\n", 846 i, pmu_irq_stats[i], irq_names[i]); 847 } 848 return 0; 849 } 850 851 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file) 852 { 853 return single_open(file, pmu_irqstats_proc_show, NULL); 854 } 855 856 static const struct file_operations pmu_irqstats_proc_fops = { 857 .owner = THIS_MODULE, 858 .open = pmu_irqstats_proc_open, 859 .read = seq_read, 860 .llseek = seq_lseek, 861 .release = single_release, 862 }; 863 864 static int pmu_battery_proc_show(struct seq_file *m, void *v) 865 { 866 long batnum = (long)m->private; 867 868 seq_putc(m, '\n'); 869 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags); 870 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge); 871 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge); 872 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage); 873 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage); 874 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining); 875 return 0; 876 } 877 878 static int pmu_battery_proc_open(struct inode *inode, struct file *file) 879 { 880 return single_open(file, pmu_battery_proc_show, PDE_DATA(inode)); 881 } 882 883 static const struct file_operations pmu_battery_proc_fops = { 884 .owner = THIS_MODULE, 885 .open = pmu_battery_proc_open, 886 .read = seq_read, 887 .llseek = seq_lseek, 888 .release = single_release, 889 }; 890 891 static int pmu_options_proc_show(struct seq_file *m, void *v) 892 { 893 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 894 if (pmu_kind == PMU_KEYLARGO_BASED && 895 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 896 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup); 897 #endif 898 if (pmu_kind == PMU_KEYLARGO_BASED) 899 seq_printf(m, "server_mode=%d\n", option_server_mode); 900 901 return 0; 902 } 903 904 static int pmu_options_proc_open(struct inode *inode, struct file *file) 905 { 906 return single_open(file, pmu_options_proc_show, NULL); 907 } 908 909 static ssize_t pmu_options_proc_write(struct file *file, 910 const char __user *buffer, size_t count, loff_t *pos) 911 { 912 char tmp[33]; 913 char *label, *val; 914 size_t fcount = count; 915 916 if (!count) 917 return -EINVAL; 918 if (count > 32) 919 count = 32; 920 if (copy_from_user(tmp, buffer, count)) 921 return -EFAULT; 922 tmp[count] = 0; 923 924 label = tmp; 925 while(*label == ' ') 926 label++; 927 val = label; 928 while(*val && (*val != '=')) { 929 if (*val == ' ') 930 *val = 0; 931 val++; 932 } 933 if ((*val) == 0) 934 return -EINVAL; 935 *(val++) = 0; 936 while(*val == ' ') 937 val++; 938 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 939 if (pmu_kind == PMU_KEYLARGO_BASED && 940 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 941 if (!strcmp(label, "lid_wakeup")) 942 option_lid_wakeup = ((*val) == '1'); 943 #endif 944 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) { 945 int new_value; 946 new_value = ((*val) == '1'); 947 if (new_value != option_server_mode) 948 pmu_set_server_mode(new_value); 949 } 950 return fcount; 951 } 952 953 static const struct file_operations pmu_options_proc_fops = { 954 .owner = THIS_MODULE, 955 .open = pmu_options_proc_open, 956 .read = seq_read, 957 .llseek = seq_lseek, 958 .release = single_release, 959 .write = pmu_options_proc_write, 960 }; 961 962 #ifdef CONFIG_ADB 963 /* Send an ADB command */ 964 static int pmu_send_request(struct adb_request *req, int sync) 965 { 966 int i, ret; 967 968 if ((vias == NULL) || (!pmu_fully_inited)) { 969 req->complete = 1; 970 return -ENXIO; 971 } 972 973 ret = -EINVAL; 974 975 switch (req->data[0]) { 976 case PMU_PACKET: 977 for (i = 0; i < req->nbytes - 1; ++i) 978 req->data[i] = req->data[i+1]; 979 --req->nbytes; 980 if (pmu_data_len[req->data[0]][1] != 0) { 981 req->reply[0] = ADB_RET_OK; 982 req->reply_len = 1; 983 } else 984 req->reply_len = 0; 985 ret = pmu_queue_request(req); 986 break; 987 case CUDA_PACKET: 988 switch (req->data[1]) { 989 case CUDA_GET_TIME: 990 if (req->nbytes != 2) 991 break; 992 req->data[0] = PMU_READ_RTC; 993 req->nbytes = 1; 994 req->reply_len = 3; 995 req->reply[0] = CUDA_PACKET; 996 req->reply[1] = 0; 997 req->reply[2] = CUDA_GET_TIME; 998 ret = pmu_queue_request(req); 999 break; 1000 case CUDA_SET_TIME: 1001 if (req->nbytes != 6) 1002 break; 1003 req->data[0] = PMU_SET_RTC; 1004 req->nbytes = 5; 1005 for (i = 1; i <= 4; ++i) 1006 req->data[i] = req->data[i+1]; 1007 req->reply_len = 3; 1008 req->reply[0] = CUDA_PACKET; 1009 req->reply[1] = 0; 1010 req->reply[2] = CUDA_SET_TIME; 1011 ret = pmu_queue_request(req); 1012 break; 1013 } 1014 break; 1015 case ADB_PACKET: 1016 if (!pmu_has_adb) 1017 return -ENXIO; 1018 for (i = req->nbytes - 1; i > 1; --i) 1019 req->data[i+2] = req->data[i]; 1020 req->data[3] = req->nbytes - 2; 1021 req->data[2] = pmu_adb_flags; 1022 /*req->data[1] = req->data[1];*/ 1023 req->data[0] = PMU_ADB_CMD; 1024 req->nbytes += 2; 1025 req->reply_expected = 1; 1026 req->reply_len = 0; 1027 ret = pmu_queue_request(req); 1028 break; 1029 } 1030 if (ret) { 1031 req->complete = 1; 1032 return ret; 1033 } 1034 1035 if (sync) 1036 while (!req->complete) 1037 pmu_poll(); 1038 1039 return 0; 1040 } 1041 1042 /* Enable/disable autopolling */ 1043 static int __pmu_adb_autopoll(int devs) 1044 { 1045 struct adb_request req; 1046 1047 if (devs) { 1048 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86, 1049 adb_dev_map >> 8, adb_dev_map); 1050 pmu_adb_flags = 2; 1051 } else { 1052 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF); 1053 pmu_adb_flags = 0; 1054 } 1055 while (!req.complete) 1056 pmu_poll(); 1057 return 0; 1058 } 1059 1060 static int pmu_adb_autopoll(int devs) 1061 { 1062 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1063 return -ENXIO; 1064 1065 adb_dev_map = devs; 1066 return __pmu_adb_autopoll(devs); 1067 } 1068 1069 /* Reset the ADB bus */ 1070 static int pmu_adb_reset_bus(void) 1071 { 1072 struct adb_request req; 1073 int save_autopoll = adb_dev_map; 1074 1075 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1076 return -ENXIO; 1077 1078 /* anyone got a better idea?? */ 1079 __pmu_adb_autopoll(0); 1080 1081 req.nbytes = 4; 1082 req.done = NULL; 1083 req.data[0] = PMU_ADB_CMD; 1084 req.data[1] = ADB_BUSRESET; 1085 req.data[2] = 0; 1086 req.data[3] = 0; 1087 req.data[4] = 0; 1088 req.reply_len = 0; 1089 req.reply_expected = 1; 1090 if (pmu_queue_request(&req) != 0) { 1091 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n"); 1092 return -EIO; 1093 } 1094 pmu_wait_complete(&req); 1095 1096 if (save_autopoll != 0) 1097 __pmu_adb_autopoll(save_autopoll); 1098 1099 return 0; 1100 } 1101 #endif /* CONFIG_ADB */ 1102 1103 /* Construct and send a pmu request */ 1104 int 1105 pmu_request(struct adb_request *req, void (*done)(struct adb_request *), 1106 int nbytes, ...) 1107 { 1108 va_list list; 1109 int i; 1110 1111 if (vias == NULL) 1112 return -ENXIO; 1113 1114 if (nbytes < 0 || nbytes > 32) { 1115 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes); 1116 req->complete = 1; 1117 return -EINVAL; 1118 } 1119 req->nbytes = nbytes; 1120 req->done = done; 1121 va_start(list, nbytes); 1122 for (i = 0; i < nbytes; ++i) 1123 req->data[i] = va_arg(list, int); 1124 va_end(list); 1125 req->reply_len = 0; 1126 req->reply_expected = 0; 1127 return pmu_queue_request(req); 1128 } 1129 1130 int 1131 pmu_queue_request(struct adb_request *req) 1132 { 1133 unsigned long flags; 1134 int nsend; 1135 1136 if (via == NULL) { 1137 req->complete = 1; 1138 return -ENXIO; 1139 } 1140 if (req->nbytes <= 0) { 1141 req->complete = 1; 1142 return 0; 1143 } 1144 nsend = pmu_data_len[req->data[0]][0]; 1145 if (nsend >= 0 && req->nbytes != nsend + 1) { 1146 req->complete = 1; 1147 return -EINVAL; 1148 } 1149 1150 req->next = NULL; 1151 req->sent = 0; 1152 req->complete = 0; 1153 1154 spin_lock_irqsave(&pmu_lock, flags); 1155 if (current_req != 0) { 1156 last_req->next = req; 1157 last_req = req; 1158 } else { 1159 current_req = req; 1160 last_req = req; 1161 if (pmu_state == idle) 1162 pmu_start(); 1163 } 1164 spin_unlock_irqrestore(&pmu_lock, flags); 1165 1166 return 0; 1167 } 1168 1169 static inline void 1170 wait_for_ack(void) 1171 { 1172 /* Sightly increased the delay, I had one occurrence of the message 1173 * reported 1174 */ 1175 int timeout = 4000; 1176 while ((in_8(&via[B]) & TACK) == 0) { 1177 if (--timeout < 0) { 1178 printk(KERN_ERR "PMU not responding (!ack)\n"); 1179 return; 1180 } 1181 udelay(10); 1182 } 1183 } 1184 1185 /* New PMU seems to be very sensitive to those timings, so we make sure 1186 * PCI is flushed immediately */ 1187 static inline void 1188 send_byte(int x) 1189 { 1190 volatile unsigned char __iomem *v = via; 1191 1192 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT); 1193 out_8(&v[SR], x); 1194 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */ 1195 (void)in_8(&v[B]); 1196 } 1197 1198 static inline void 1199 recv_byte(void) 1200 { 1201 volatile unsigned char __iomem *v = via; 1202 1203 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT); 1204 in_8(&v[SR]); /* resets SR */ 1205 out_8(&v[B], in_8(&v[B]) & ~TREQ); 1206 (void)in_8(&v[B]); 1207 } 1208 1209 static inline void 1210 pmu_done(struct adb_request *req) 1211 { 1212 void (*done)(struct adb_request *) = req->done; 1213 mb(); 1214 req->complete = 1; 1215 /* Here, we assume that if the request has a done member, the 1216 * struct request will survive to setting req->complete to 1 1217 */ 1218 if (done) 1219 (*done)(req); 1220 } 1221 1222 static void 1223 pmu_start(void) 1224 { 1225 struct adb_request *req; 1226 1227 /* assert pmu_state == idle */ 1228 /* get the packet to send */ 1229 req = current_req; 1230 if (req == 0 || pmu_state != idle 1231 || (/*req->reply_expected && */req_awaiting_reply)) 1232 return; 1233 1234 pmu_state = sending; 1235 data_index = 1; 1236 data_len = pmu_data_len[req->data[0]][0]; 1237 1238 /* Sounds safer to make sure ACK is high before writing. This helped 1239 * kill a problem with ADB and some iBooks 1240 */ 1241 wait_for_ack(); 1242 /* set the shift register to shift out and send a byte */ 1243 send_byte(req->data[0]); 1244 } 1245 1246 void 1247 pmu_poll(void) 1248 { 1249 if (!via) 1250 return; 1251 if (disable_poll) 1252 return; 1253 via_pmu_interrupt(0, NULL); 1254 } 1255 1256 void 1257 pmu_poll_adb(void) 1258 { 1259 if (!via) 1260 return; 1261 if (disable_poll) 1262 return; 1263 /* Kicks ADB read when PMU is suspended */ 1264 adb_int_pending = 1; 1265 do { 1266 via_pmu_interrupt(0, NULL); 1267 } while (pmu_suspended && (adb_int_pending || pmu_state != idle 1268 || req_awaiting_reply)); 1269 } 1270 1271 void 1272 pmu_wait_complete(struct adb_request *req) 1273 { 1274 if (!via) 1275 return; 1276 while((pmu_state != idle && pmu_state != locked) || !req->complete) 1277 via_pmu_interrupt(0, NULL); 1278 } 1279 1280 /* This function loops until the PMU is idle and prevents it from 1281 * anwsering to ADB interrupts. pmu_request can still be called. 1282 * This is done to avoid spurrious shutdowns when we know we'll have 1283 * interrupts switched off for a long time 1284 */ 1285 void 1286 pmu_suspend(void) 1287 { 1288 unsigned long flags; 1289 1290 if (!via) 1291 return; 1292 1293 spin_lock_irqsave(&pmu_lock, flags); 1294 pmu_suspended++; 1295 if (pmu_suspended > 1) { 1296 spin_unlock_irqrestore(&pmu_lock, flags); 1297 return; 1298 } 1299 1300 do { 1301 spin_unlock_irqrestore(&pmu_lock, flags); 1302 if (req_awaiting_reply) 1303 adb_int_pending = 1; 1304 via_pmu_interrupt(0, NULL); 1305 spin_lock_irqsave(&pmu_lock, flags); 1306 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) { 1307 if (gpio_irq >= 0) 1308 disable_irq_nosync(gpio_irq); 1309 out_8(&via[IER], CB1_INT | IER_CLR); 1310 spin_unlock_irqrestore(&pmu_lock, flags); 1311 break; 1312 } 1313 } while (1); 1314 } 1315 1316 void 1317 pmu_resume(void) 1318 { 1319 unsigned long flags; 1320 1321 if (!via || (pmu_suspended < 1)) 1322 return; 1323 1324 spin_lock_irqsave(&pmu_lock, flags); 1325 pmu_suspended--; 1326 if (pmu_suspended > 0) { 1327 spin_unlock_irqrestore(&pmu_lock, flags); 1328 return; 1329 } 1330 adb_int_pending = 1; 1331 if (gpio_irq >= 0) 1332 enable_irq(gpio_irq); 1333 out_8(&via[IER], CB1_INT | IER_SET); 1334 spin_unlock_irqrestore(&pmu_lock, flags); 1335 pmu_poll(); 1336 } 1337 1338 /* Interrupt data could be the result data from an ADB cmd */ 1339 static void 1340 pmu_handle_data(unsigned char *data, int len) 1341 { 1342 unsigned char ints, pirq; 1343 int i = 0; 1344 1345 asleep = 0; 1346 if (drop_interrupts || len < 1) { 1347 adb_int_pending = 0; 1348 pmu_irq_stats[8]++; 1349 return; 1350 } 1351 1352 /* Get PMU interrupt mask */ 1353 ints = data[0]; 1354 1355 /* Record zero interrupts for stats */ 1356 if (ints == 0) 1357 pmu_irq_stats[9]++; 1358 1359 /* Hack to deal with ADB autopoll flag */ 1360 if (ints & PMU_INT_ADB) 1361 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL); 1362 1363 next: 1364 1365 if (ints == 0) { 1366 if (i > pmu_irq_stats[10]) 1367 pmu_irq_stats[10] = i; 1368 return; 1369 } 1370 1371 for (pirq = 0; pirq < 8; pirq++) 1372 if (ints & (1 << pirq)) 1373 break; 1374 pmu_irq_stats[pirq]++; 1375 i++; 1376 ints &= ~(1 << pirq); 1377 1378 /* Note: for some reason, we get an interrupt with len=1, 1379 * data[0]==0 after each normal ADB interrupt, at least 1380 * on the Pismo. Still investigating... --BenH 1381 */ 1382 if ((1 << pirq) & PMU_INT_ADB) { 1383 if ((data[0] & PMU_INT_ADB_AUTO) == 0) { 1384 struct adb_request *req = req_awaiting_reply; 1385 if (req == 0) { 1386 printk(KERN_ERR "PMU: extra ADB reply\n"); 1387 return; 1388 } 1389 req_awaiting_reply = NULL; 1390 if (len <= 2) 1391 req->reply_len = 0; 1392 else { 1393 memcpy(req->reply, data + 1, len - 1); 1394 req->reply_len = len - 1; 1395 } 1396 pmu_done(req); 1397 } else { 1398 if (len == 4 && data[1] == 0x2c) { 1399 extern int xmon_wants_key, xmon_adb_keycode; 1400 if (xmon_wants_key) { 1401 xmon_adb_keycode = data[2]; 1402 return; 1403 } 1404 } 1405 #ifdef CONFIG_ADB 1406 /* 1407 * XXX On the [23]400 the PMU gives us an up 1408 * event for keycodes 0x74 or 0x75 when the PC 1409 * card eject buttons are released, so we 1410 * ignore those events. 1411 */ 1412 if (!(pmu_kind == PMU_OHARE_BASED && len == 4 1413 && data[1] == 0x2c && data[3] == 0xff 1414 && (data[2] & ~1) == 0xf4)) 1415 adb_input(data+1, len-1, 1); 1416 #endif /* CONFIG_ADB */ 1417 } 1418 } 1419 /* Sound/brightness button pressed */ 1420 else if ((1 << pirq) & PMU_INT_SNDBRT) { 1421 #ifdef CONFIG_PMAC_BACKLIGHT 1422 if (len == 3) 1423 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4); 1424 #endif 1425 } 1426 /* Tick interrupt */ 1427 else if ((1 << pirq) & PMU_INT_TICK) { 1428 /* Environement or tick interrupt, query batteries */ 1429 if (pmu_battery_count) { 1430 if ((--query_batt_timer) == 0) { 1431 query_battery_state(); 1432 query_batt_timer = BATTERY_POLLING_COUNT; 1433 } 1434 } 1435 } 1436 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) { 1437 if (pmu_battery_count) 1438 query_battery_state(); 1439 pmu_pass_intr(data, len); 1440 /* len == 6 is probably a bad check. But how do I 1441 * know what PMU versions send what events here? */ 1442 if (len == 6) { 1443 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8)); 1444 via_pmu_event(PMU_EVT_LID, data[1]&1); 1445 } 1446 } else { 1447 pmu_pass_intr(data, len); 1448 } 1449 goto next; 1450 } 1451 1452 static struct adb_request* 1453 pmu_sr_intr(void) 1454 { 1455 struct adb_request *req; 1456 int bite = 0; 1457 1458 if (via[B] & TREQ) { 1459 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]); 1460 out_8(&via[IFR], SR_INT); 1461 return NULL; 1462 } 1463 /* The ack may not yet be low when we get the interrupt */ 1464 while ((in_8(&via[B]) & TACK) != 0) 1465 ; 1466 1467 /* if reading grab the byte, and reset the interrupt */ 1468 if (pmu_state == reading || pmu_state == reading_intr) 1469 bite = in_8(&via[SR]); 1470 1471 /* reset TREQ and wait for TACK to go high */ 1472 out_8(&via[B], in_8(&via[B]) | TREQ); 1473 wait_for_ack(); 1474 1475 switch (pmu_state) { 1476 case sending: 1477 req = current_req; 1478 if (data_len < 0) { 1479 data_len = req->nbytes - 1; 1480 send_byte(data_len); 1481 break; 1482 } 1483 if (data_index <= data_len) { 1484 send_byte(req->data[data_index++]); 1485 break; 1486 } 1487 req->sent = 1; 1488 data_len = pmu_data_len[req->data[0]][1]; 1489 if (data_len == 0) { 1490 pmu_state = idle; 1491 current_req = req->next; 1492 if (req->reply_expected) 1493 req_awaiting_reply = req; 1494 else 1495 return req; 1496 } else { 1497 pmu_state = reading; 1498 data_index = 0; 1499 reply_ptr = req->reply + req->reply_len; 1500 recv_byte(); 1501 } 1502 break; 1503 1504 case intack: 1505 data_index = 0; 1506 data_len = -1; 1507 pmu_state = reading_intr; 1508 reply_ptr = interrupt_data[int_data_last]; 1509 recv_byte(); 1510 if (gpio_irq >= 0 && !gpio_irq_enabled) { 1511 enable_irq(gpio_irq); 1512 gpio_irq_enabled = 1; 1513 } 1514 break; 1515 1516 case reading: 1517 case reading_intr: 1518 if (data_len == -1) { 1519 data_len = bite; 1520 if (bite > 32) 1521 printk(KERN_ERR "PMU: bad reply len %d\n", bite); 1522 } else if (data_index < 32) { 1523 reply_ptr[data_index++] = bite; 1524 } 1525 if (data_index < data_len) { 1526 recv_byte(); 1527 break; 1528 } 1529 1530 if (pmu_state == reading_intr) { 1531 pmu_state = idle; 1532 int_data_state[int_data_last] = int_data_ready; 1533 interrupt_data_len[int_data_last] = data_len; 1534 } else { 1535 req = current_req; 1536 /* 1537 * For PMU sleep and freq change requests, we lock the 1538 * PMU until it's explicitly unlocked. This avoids any 1539 * spurrious event polling getting in 1540 */ 1541 current_req = req->next; 1542 req->reply_len += data_index; 1543 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED) 1544 pmu_state = locked; 1545 else 1546 pmu_state = idle; 1547 return req; 1548 } 1549 break; 1550 1551 default: 1552 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n", 1553 pmu_state); 1554 } 1555 return NULL; 1556 } 1557 1558 static irqreturn_t 1559 via_pmu_interrupt(int irq, void *arg) 1560 { 1561 unsigned long flags; 1562 int intr; 1563 int nloop = 0; 1564 int int_data = -1; 1565 struct adb_request *req = NULL; 1566 int handled = 0; 1567 1568 /* This is a bit brutal, we can probably do better */ 1569 spin_lock_irqsave(&pmu_lock, flags); 1570 ++disable_poll; 1571 1572 for (;;) { 1573 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT); 1574 if (intr == 0) 1575 break; 1576 handled = 1; 1577 if (++nloop > 1000) { 1578 printk(KERN_DEBUG "PMU: stuck in intr loop, " 1579 "intr=%x, ier=%x pmu_state=%d\n", 1580 intr, in_8(&via[IER]), pmu_state); 1581 break; 1582 } 1583 out_8(&via[IFR], intr); 1584 if (intr & CB1_INT) { 1585 adb_int_pending = 1; 1586 pmu_irq_stats[0]++; 1587 } 1588 if (intr & SR_INT) { 1589 req = pmu_sr_intr(); 1590 if (req) 1591 break; 1592 } 1593 } 1594 1595 recheck: 1596 if (pmu_state == idle) { 1597 if (adb_int_pending) { 1598 if (int_data_state[0] == int_data_empty) 1599 int_data_last = 0; 1600 else if (int_data_state[1] == int_data_empty) 1601 int_data_last = 1; 1602 else 1603 goto no_free_slot; 1604 pmu_state = intack; 1605 int_data_state[int_data_last] = int_data_fill; 1606 /* Sounds safer to make sure ACK is high before writing. 1607 * This helped kill a problem with ADB and some iBooks 1608 */ 1609 wait_for_ack(); 1610 send_byte(PMU_INT_ACK); 1611 adb_int_pending = 0; 1612 } else if (current_req) 1613 pmu_start(); 1614 } 1615 no_free_slot: 1616 /* Mark the oldest buffer for flushing */ 1617 if (int_data_state[!int_data_last] == int_data_ready) { 1618 int_data_state[!int_data_last] = int_data_flush; 1619 int_data = !int_data_last; 1620 } else if (int_data_state[int_data_last] == int_data_ready) { 1621 int_data_state[int_data_last] = int_data_flush; 1622 int_data = int_data_last; 1623 } 1624 --disable_poll; 1625 spin_unlock_irqrestore(&pmu_lock, flags); 1626 1627 /* Deal with completed PMU requests outside of the lock */ 1628 if (req) { 1629 pmu_done(req); 1630 req = NULL; 1631 } 1632 1633 /* Deal with interrupt datas outside of the lock */ 1634 if (int_data >= 0) { 1635 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]); 1636 spin_lock_irqsave(&pmu_lock, flags); 1637 ++disable_poll; 1638 int_data_state[int_data] = int_data_empty; 1639 int_data = -1; 1640 goto recheck; 1641 } 1642 1643 return IRQ_RETVAL(handled); 1644 } 1645 1646 void 1647 pmu_unlock(void) 1648 { 1649 unsigned long flags; 1650 1651 spin_lock_irqsave(&pmu_lock, flags); 1652 if (pmu_state == locked) 1653 pmu_state = idle; 1654 adb_int_pending = 1; 1655 spin_unlock_irqrestore(&pmu_lock, flags); 1656 } 1657 1658 1659 static irqreturn_t 1660 gpio1_interrupt(int irq, void *arg) 1661 { 1662 unsigned long flags; 1663 1664 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) { 1665 spin_lock_irqsave(&pmu_lock, flags); 1666 if (gpio_irq_enabled > 0) { 1667 disable_irq_nosync(gpio_irq); 1668 gpio_irq_enabled = 0; 1669 } 1670 pmu_irq_stats[1]++; 1671 adb_int_pending = 1; 1672 spin_unlock_irqrestore(&pmu_lock, flags); 1673 via_pmu_interrupt(0, NULL); 1674 return IRQ_HANDLED; 1675 } 1676 return IRQ_NONE; 1677 } 1678 1679 void 1680 pmu_enable_irled(int on) 1681 { 1682 struct adb_request req; 1683 1684 if (vias == NULL) 1685 return ; 1686 if (pmu_kind == PMU_KEYLARGO_BASED) 1687 return ; 1688 1689 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED | 1690 (on ? PMU_POW_ON : PMU_POW_OFF)); 1691 pmu_wait_complete(&req); 1692 } 1693 1694 void 1695 pmu_restart(void) 1696 { 1697 struct adb_request req; 1698 1699 if (via == NULL) 1700 return; 1701 1702 local_irq_disable(); 1703 1704 drop_interrupts = 1; 1705 1706 if (pmu_kind != PMU_KEYLARGO_BASED) { 1707 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1708 PMU_INT_TICK ); 1709 while(!req.complete) 1710 pmu_poll(); 1711 } 1712 1713 pmu_request(&req, NULL, 1, PMU_RESET); 1714 pmu_wait_complete(&req); 1715 for (;;) 1716 ; 1717 } 1718 1719 void 1720 pmu_shutdown(void) 1721 { 1722 struct adb_request req; 1723 1724 if (via == NULL) 1725 return; 1726 1727 local_irq_disable(); 1728 1729 drop_interrupts = 1; 1730 1731 if (pmu_kind != PMU_KEYLARGO_BASED) { 1732 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1733 PMU_INT_TICK ); 1734 pmu_wait_complete(&req); 1735 } else { 1736 /* Disable server mode on shutdown or we'll just 1737 * wake up again 1738 */ 1739 pmu_set_server_mode(0); 1740 } 1741 1742 pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 1743 'M', 'A', 'T', 'T'); 1744 pmu_wait_complete(&req); 1745 for (;;) 1746 ; 1747 } 1748 1749 int 1750 pmu_present(void) 1751 { 1752 return via != 0; 1753 } 1754 1755 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 1756 /* 1757 * Put the powerbook to sleep. 1758 */ 1759 1760 static u32 save_via[8]; 1761 1762 static void 1763 save_via_state(void) 1764 { 1765 save_via[0] = in_8(&via[ANH]); 1766 save_via[1] = in_8(&via[DIRA]); 1767 save_via[2] = in_8(&via[B]); 1768 save_via[3] = in_8(&via[DIRB]); 1769 save_via[4] = in_8(&via[PCR]); 1770 save_via[5] = in_8(&via[ACR]); 1771 save_via[6] = in_8(&via[T1CL]); 1772 save_via[7] = in_8(&via[T1CH]); 1773 } 1774 static void 1775 restore_via_state(void) 1776 { 1777 out_8(&via[ANH], save_via[0]); 1778 out_8(&via[DIRA], save_via[1]); 1779 out_8(&via[B], save_via[2]); 1780 out_8(&via[DIRB], save_via[3]); 1781 out_8(&via[PCR], save_via[4]); 1782 out_8(&via[ACR], save_via[5]); 1783 out_8(&via[T1CL], save_via[6]); 1784 out_8(&via[T1CH], save_via[7]); 1785 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 1786 out_8(&via[IFR], 0x7f); /* clear IFR */ 1787 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 1788 } 1789 1790 #define GRACKLE_PM (1<<7) 1791 #define GRACKLE_DOZE (1<<5) 1792 #define GRACKLE_NAP (1<<4) 1793 #define GRACKLE_SLEEP (1<<3) 1794 1795 static int powerbook_sleep_grackle(void) 1796 { 1797 unsigned long save_l2cr; 1798 unsigned short pmcr1; 1799 struct adb_request req; 1800 struct pci_dev *grackle; 1801 1802 grackle = pci_get_domain_bus_and_slot(0, 0, 0); 1803 if (!grackle) 1804 return -ENODEV; 1805 1806 /* Turn off various things. Darwin does some retry tests here... */ 1807 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE); 1808 pmu_wait_complete(&req); 1809 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1810 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY); 1811 pmu_wait_complete(&req); 1812 1813 /* For 750, save backside cache setting and disable it */ 1814 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 1815 1816 if (!__fake_sleep) { 1817 /* Ask the PMU to put us to sleep */ 1818 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1819 pmu_wait_complete(&req); 1820 } 1821 1822 /* The VIA is supposed not to be restored correctly*/ 1823 save_via_state(); 1824 /* We shut down some HW */ 1825 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 1826 1827 pci_read_config_word(grackle, 0x70, &pmcr1); 1828 /* Apparently, MacOS uses NAP mode for Grackle ??? */ 1829 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 1830 pmcr1 |= GRACKLE_PM|GRACKLE_NAP; 1831 pci_write_config_word(grackle, 0x70, pmcr1); 1832 1833 /* Call low-level ASM sleep handler */ 1834 if (__fake_sleep) 1835 mdelay(5000); 1836 else 1837 low_sleep_handler(); 1838 1839 /* We're awake again, stop grackle PM */ 1840 pci_read_config_word(grackle, 0x70, &pmcr1); 1841 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 1842 pci_write_config_word(grackle, 0x70, pmcr1); 1843 1844 pci_dev_put(grackle); 1845 1846 /* Make sure the PMU is idle */ 1847 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 1848 restore_via_state(); 1849 1850 /* Restore L2 cache */ 1851 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 1852 _set_L2CR(save_l2cr); 1853 1854 /* Restore userland MMU context */ 1855 switch_mmu_context(NULL, current->active_mm, NULL); 1856 1857 /* Power things up */ 1858 pmu_unlock(); 1859 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1860 pmu_wait_complete(&req); 1861 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, 1862 PMU_POW0_ON|PMU_POW0_HARD_DRIVE); 1863 pmu_wait_complete(&req); 1864 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1865 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY); 1866 pmu_wait_complete(&req); 1867 1868 return 0; 1869 } 1870 1871 static int 1872 powerbook_sleep_Core99(void) 1873 { 1874 unsigned long save_l2cr; 1875 unsigned long save_l3cr; 1876 struct adb_request req; 1877 1878 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) { 1879 printk(KERN_ERR "Sleep mode not supported on this machine\n"); 1880 return -ENOSYS; 1881 } 1882 1883 if (num_online_cpus() > 1 || cpu_is_offline(0)) 1884 return -EAGAIN; 1885 1886 /* Stop environment and ADB interrupts */ 1887 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 1888 pmu_wait_complete(&req); 1889 1890 /* Tell PMU what events will wake us up */ 1891 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS, 1892 0xff, 0xff); 1893 pmu_wait_complete(&req); 1894 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS, 1895 0, PMU_PWR_WAKEUP_KEY | 1896 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0)); 1897 pmu_wait_complete(&req); 1898 1899 /* Save the state of the L2 and L3 caches */ 1900 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */ 1901 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 1902 1903 if (!__fake_sleep) { 1904 /* Ask the PMU to put us to sleep */ 1905 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1906 pmu_wait_complete(&req); 1907 } 1908 1909 /* The VIA is supposed not to be restored correctly*/ 1910 save_via_state(); 1911 1912 /* Shut down various ASICs. There's a chance that we can no longer 1913 * talk to the PMU after this, so I moved it to _after_ sending the 1914 * sleep command to it. Still need to be checked. 1915 */ 1916 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 1917 1918 /* Call low-level ASM sleep handler */ 1919 if (__fake_sleep) 1920 mdelay(5000); 1921 else 1922 low_sleep_handler(); 1923 1924 /* Restore Apple core ASICs state */ 1925 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 1926 1927 /* Restore VIA */ 1928 restore_via_state(); 1929 1930 /* tweak LPJ before cpufreq is there */ 1931 loops_per_jiffy *= 2; 1932 1933 /* Restore video */ 1934 pmac_call_early_video_resume(); 1935 1936 /* Restore L2 cache */ 1937 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 1938 _set_L2CR(save_l2cr); 1939 /* Restore L3 cache */ 1940 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0) 1941 _set_L3CR(save_l3cr); 1942 1943 /* Restore userland MMU context */ 1944 switch_mmu_context(NULL, current->active_mm, NULL); 1945 1946 /* Tell PMU we are ready */ 1947 pmu_unlock(); 1948 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 1949 pmu_wait_complete(&req); 1950 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1951 pmu_wait_complete(&req); 1952 1953 /* Restore LPJ, cpufreq will adjust the cpu frequency */ 1954 loops_per_jiffy /= 2; 1955 1956 return 0; 1957 } 1958 1959 #define PB3400_MEM_CTRL 0xf8000000 1960 #define PB3400_MEM_CTRL_SLEEP 0x70 1961 1962 static void __iomem *pb3400_mem_ctrl; 1963 1964 static void powerbook_sleep_init_3400(void) 1965 { 1966 /* map in the memory controller registers */ 1967 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100); 1968 if (pb3400_mem_ctrl == NULL) 1969 printk(KERN_WARNING "ioremap failed: sleep won't be possible"); 1970 } 1971 1972 static int powerbook_sleep_3400(void) 1973 { 1974 int i, x; 1975 unsigned int hid0; 1976 unsigned long msr; 1977 struct adb_request sleep_req; 1978 unsigned int __iomem *mem_ctrl_sleep; 1979 1980 if (pb3400_mem_ctrl == NULL) 1981 return -ENOMEM; 1982 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP; 1983 1984 /* Set the memory controller to keep the memory refreshed 1985 while we're asleep */ 1986 for (i = 0x403f; i >= 0x4000; --i) { 1987 out_be32(mem_ctrl_sleep, i); 1988 do { 1989 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff; 1990 } while (x == 0); 1991 if (x >= 0x100) 1992 break; 1993 } 1994 1995 /* Ask the PMU to put us to sleep */ 1996 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1997 pmu_wait_complete(&sleep_req); 1998 pmu_unlock(); 1999 2000 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 2001 2002 asleep = 1; 2003 2004 /* Put the CPU into sleep mode */ 2005 hid0 = mfspr(SPRN_HID0); 2006 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP; 2007 mtspr(SPRN_HID0, hid0); 2008 local_irq_enable(); 2009 msr = mfmsr() | MSR_POW; 2010 while (asleep) { 2011 mb(); 2012 mtmsr(msr); 2013 isync(); 2014 } 2015 local_irq_disable(); 2016 2017 /* OK, we're awake again, start restoring things */ 2018 out_be32(mem_ctrl_sleep, 0x3f); 2019 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 2020 2021 return 0; 2022 } 2023 2024 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2025 2026 /* 2027 * Support for /dev/pmu device 2028 */ 2029 #define RB_SIZE 0x10 2030 struct pmu_private { 2031 struct list_head list; 2032 int rb_get; 2033 int rb_put; 2034 struct rb_entry { 2035 unsigned short len; 2036 unsigned char data[16]; 2037 } rb_buf[RB_SIZE]; 2038 wait_queue_head_t wait; 2039 spinlock_t lock; 2040 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2041 int backlight_locker; 2042 #endif 2043 }; 2044 2045 static LIST_HEAD(all_pmu_pvt); 2046 static DEFINE_SPINLOCK(all_pvt_lock); 2047 2048 static void 2049 pmu_pass_intr(unsigned char *data, int len) 2050 { 2051 struct pmu_private *pp; 2052 struct list_head *list; 2053 int i; 2054 unsigned long flags; 2055 2056 if (len > sizeof(pp->rb_buf[0].data)) 2057 len = sizeof(pp->rb_buf[0].data); 2058 spin_lock_irqsave(&all_pvt_lock, flags); 2059 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) { 2060 pp = list_entry(list, struct pmu_private, list); 2061 spin_lock(&pp->lock); 2062 i = pp->rb_put + 1; 2063 if (i >= RB_SIZE) 2064 i = 0; 2065 if (i != pp->rb_get) { 2066 struct rb_entry *rp = &pp->rb_buf[pp->rb_put]; 2067 rp->len = len; 2068 memcpy(rp->data, data, len); 2069 pp->rb_put = i; 2070 wake_up_interruptible(&pp->wait); 2071 } 2072 spin_unlock(&pp->lock); 2073 } 2074 spin_unlock_irqrestore(&all_pvt_lock, flags); 2075 } 2076 2077 static int 2078 pmu_open(struct inode *inode, struct file *file) 2079 { 2080 struct pmu_private *pp; 2081 unsigned long flags; 2082 2083 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL); 2084 if (pp == 0) 2085 return -ENOMEM; 2086 pp->rb_get = pp->rb_put = 0; 2087 spin_lock_init(&pp->lock); 2088 init_waitqueue_head(&pp->wait); 2089 mutex_lock(&pmu_info_proc_mutex); 2090 spin_lock_irqsave(&all_pvt_lock, flags); 2091 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2092 pp->backlight_locker = 0; 2093 #endif 2094 list_add(&pp->list, &all_pmu_pvt); 2095 spin_unlock_irqrestore(&all_pvt_lock, flags); 2096 file->private_data = pp; 2097 mutex_unlock(&pmu_info_proc_mutex); 2098 return 0; 2099 } 2100 2101 static ssize_t 2102 pmu_read(struct file *file, char __user *buf, 2103 size_t count, loff_t *ppos) 2104 { 2105 struct pmu_private *pp = file->private_data; 2106 DECLARE_WAITQUEUE(wait, current); 2107 unsigned long flags; 2108 int ret = 0; 2109 2110 if (count < 1 || pp == 0) 2111 return -EINVAL; 2112 if (!access_ok(VERIFY_WRITE, buf, count)) 2113 return -EFAULT; 2114 2115 spin_lock_irqsave(&pp->lock, flags); 2116 add_wait_queue(&pp->wait, &wait); 2117 set_current_state(TASK_INTERRUPTIBLE); 2118 2119 for (;;) { 2120 ret = -EAGAIN; 2121 if (pp->rb_get != pp->rb_put) { 2122 int i = pp->rb_get; 2123 struct rb_entry *rp = &pp->rb_buf[i]; 2124 ret = rp->len; 2125 spin_unlock_irqrestore(&pp->lock, flags); 2126 if (ret > count) 2127 ret = count; 2128 if (ret > 0 && copy_to_user(buf, rp->data, ret)) 2129 ret = -EFAULT; 2130 if (++i >= RB_SIZE) 2131 i = 0; 2132 spin_lock_irqsave(&pp->lock, flags); 2133 pp->rb_get = i; 2134 } 2135 if (ret >= 0) 2136 break; 2137 if (file->f_flags & O_NONBLOCK) 2138 break; 2139 ret = -ERESTARTSYS; 2140 if (signal_pending(current)) 2141 break; 2142 spin_unlock_irqrestore(&pp->lock, flags); 2143 schedule(); 2144 spin_lock_irqsave(&pp->lock, flags); 2145 } 2146 __set_current_state(TASK_RUNNING); 2147 remove_wait_queue(&pp->wait, &wait); 2148 spin_unlock_irqrestore(&pp->lock, flags); 2149 2150 return ret; 2151 } 2152 2153 static ssize_t 2154 pmu_write(struct file *file, const char __user *buf, 2155 size_t count, loff_t *ppos) 2156 { 2157 return 0; 2158 } 2159 2160 static __poll_t 2161 pmu_fpoll(struct file *filp, poll_table *wait) 2162 { 2163 struct pmu_private *pp = filp->private_data; 2164 __poll_t mask = 0; 2165 unsigned long flags; 2166 2167 if (pp == 0) 2168 return 0; 2169 poll_wait(filp, &pp->wait, wait); 2170 spin_lock_irqsave(&pp->lock, flags); 2171 if (pp->rb_get != pp->rb_put) 2172 mask |= EPOLLIN; 2173 spin_unlock_irqrestore(&pp->lock, flags); 2174 return mask; 2175 } 2176 2177 static int 2178 pmu_release(struct inode *inode, struct file *file) 2179 { 2180 struct pmu_private *pp = file->private_data; 2181 unsigned long flags; 2182 2183 if (pp != 0) { 2184 file->private_data = NULL; 2185 spin_lock_irqsave(&all_pvt_lock, flags); 2186 list_del(&pp->list); 2187 spin_unlock_irqrestore(&all_pvt_lock, flags); 2188 2189 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2190 if (pp->backlight_locker) 2191 pmac_backlight_enable(); 2192 #endif 2193 2194 kfree(pp); 2195 } 2196 return 0; 2197 } 2198 2199 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 2200 static void pmac_suspend_disable_irqs(void) 2201 { 2202 /* Call platform functions marked "on sleep" */ 2203 pmac_pfunc_i2c_suspend(); 2204 pmac_pfunc_base_suspend(); 2205 } 2206 2207 static int powerbook_sleep(suspend_state_t state) 2208 { 2209 int error = 0; 2210 2211 /* Wait for completion of async requests */ 2212 while (!batt_req.complete) 2213 pmu_poll(); 2214 2215 /* Giveup the lazy FPU & vec so we don't have to back them 2216 * up from the low level code 2217 */ 2218 enable_kernel_fp(); 2219 2220 #ifdef CONFIG_ALTIVEC 2221 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 2222 enable_kernel_altivec(); 2223 #endif /* CONFIG_ALTIVEC */ 2224 2225 switch (pmu_kind) { 2226 case PMU_OHARE_BASED: 2227 error = powerbook_sleep_3400(); 2228 break; 2229 case PMU_HEATHROW_BASED: 2230 case PMU_PADDINGTON_BASED: 2231 error = powerbook_sleep_grackle(); 2232 break; 2233 case PMU_KEYLARGO_BASED: 2234 error = powerbook_sleep_Core99(); 2235 break; 2236 default: 2237 return -ENOSYS; 2238 } 2239 2240 if (error) 2241 return error; 2242 2243 mdelay(100); 2244 2245 return 0; 2246 } 2247 2248 static void pmac_suspend_enable_irqs(void) 2249 { 2250 /* Force a poll of ADB interrupts */ 2251 adb_int_pending = 1; 2252 via_pmu_interrupt(0, NULL); 2253 2254 mdelay(10); 2255 2256 /* Call platform functions marked "on wake" */ 2257 pmac_pfunc_base_resume(); 2258 pmac_pfunc_i2c_resume(); 2259 } 2260 2261 static int pmu_sleep_valid(suspend_state_t state) 2262 { 2263 return state == PM_SUSPEND_MEM 2264 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0); 2265 } 2266 2267 static const struct platform_suspend_ops pmu_pm_ops = { 2268 .enter = powerbook_sleep, 2269 .valid = pmu_sleep_valid, 2270 }; 2271 2272 static int register_pmu_pm_ops(void) 2273 { 2274 if (pmu_kind == PMU_OHARE_BASED) 2275 powerbook_sleep_init_3400(); 2276 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs; 2277 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs; 2278 suspend_set_ops(&pmu_pm_ops); 2279 2280 return 0; 2281 } 2282 2283 device_initcall(register_pmu_pm_ops); 2284 #endif 2285 2286 static int pmu_ioctl(struct file *filp, 2287 u_int cmd, u_long arg) 2288 { 2289 __u32 __user *argp = (__u32 __user *)arg; 2290 int error = -EINVAL; 2291 2292 switch (cmd) { 2293 case PMU_IOC_SLEEP: 2294 if (!capable(CAP_SYS_ADMIN)) 2295 return -EACCES; 2296 return pm_suspend(PM_SUSPEND_MEM); 2297 case PMU_IOC_CAN_SLEEP: 2298 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0) 2299 return put_user(0, argp); 2300 else 2301 return put_user(1, argp); 2302 2303 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY 2304 /* Compatibility ioctl's for backlight */ 2305 case PMU_IOC_GET_BACKLIGHT: 2306 { 2307 int brightness; 2308 2309 brightness = pmac_backlight_get_legacy_brightness(); 2310 if (brightness < 0) 2311 return brightness; 2312 else 2313 return put_user(brightness, argp); 2314 2315 } 2316 case PMU_IOC_SET_BACKLIGHT: 2317 { 2318 int brightness; 2319 2320 error = get_user(brightness, argp); 2321 if (error) 2322 return error; 2323 2324 return pmac_backlight_set_legacy_brightness(brightness); 2325 } 2326 #ifdef CONFIG_INPUT_ADBHID 2327 case PMU_IOC_GRAB_BACKLIGHT: { 2328 struct pmu_private *pp = filp->private_data; 2329 2330 if (pp->backlight_locker) 2331 return 0; 2332 2333 pp->backlight_locker = 1; 2334 pmac_backlight_disable(); 2335 2336 return 0; 2337 } 2338 #endif /* CONFIG_INPUT_ADBHID */ 2339 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */ 2340 2341 case PMU_IOC_GET_MODEL: 2342 return put_user(pmu_kind, argp); 2343 case PMU_IOC_HAS_ADB: 2344 return put_user(pmu_has_adb, argp); 2345 } 2346 return error; 2347 } 2348 2349 static long pmu_unlocked_ioctl(struct file *filp, 2350 u_int cmd, u_long arg) 2351 { 2352 int ret; 2353 2354 mutex_lock(&pmu_info_proc_mutex); 2355 ret = pmu_ioctl(filp, cmd, arg); 2356 mutex_unlock(&pmu_info_proc_mutex); 2357 2358 return ret; 2359 } 2360 2361 #ifdef CONFIG_COMPAT 2362 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t) 2363 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t) 2364 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t) 2365 #define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t) 2366 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t) 2367 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t) 2368 2369 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg) 2370 { 2371 switch (cmd) { 2372 case PMU_IOC_SLEEP: 2373 break; 2374 case PMU_IOC_GET_BACKLIGHT32: 2375 cmd = PMU_IOC_GET_BACKLIGHT; 2376 break; 2377 case PMU_IOC_SET_BACKLIGHT32: 2378 cmd = PMU_IOC_SET_BACKLIGHT; 2379 break; 2380 case PMU_IOC_GET_MODEL32: 2381 cmd = PMU_IOC_GET_MODEL; 2382 break; 2383 case PMU_IOC_HAS_ADB32: 2384 cmd = PMU_IOC_HAS_ADB; 2385 break; 2386 case PMU_IOC_CAN_SLEEP32: 2387 cmd = PMU_IOC_CAN_SLEEP; 2388 break; 2389 case PMU_IOC_GRAB_BACKLIGHT32: 2390 cmd = PMU_IOC_GRAB_BACKLIGHT; 2391 break; 2392 default: 2393 return -ENOIOCTLCMD; 2394 } 2395 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); 2396 } 2397 #endif 2398 2399 static const struct file_operations pmu_device_fops = { 2400 .read = pmu_read, 2401 .write = pmu_write, 2402 .poll = pmu_fpoll, 2403 .unlocked_ioctl = pmu_unlocked_ioctl, 2404 #ifdef CONFIG_COMPAT 2405 .compat_ioctl = compat_pmu_ioctl, 2406 #endif 2407 .open = pmu_open, 2408 .release = pmu_release, 2409 .llseek = noop_llseek, 2410 }; 2411 2412 static struct miscdevice pmu_device = { 2413 PMU_MINOR, "pmu", &pmu_device_fops 2414 }; 2415 2416 static int pmu_device_init(void) 2417 { 2418 if (!via) 2419 return 0; 2420 if (misc_register(&pmu_device) < 0) 2421 printk(KERN_ERR "via-pmu: cannot register misc device.\n"); 2422 return 0; 2423 } 2424 device_initcall(pmu_device_init); 2425 2426 2427 #ifdef DEBUG_SLEEP 2428 static inline void 2429 polled_handshake(volatile unsigned char __iomem *via) 2430 { 2431 via[B] &= ~TREQ; eieio(); 2432 while ((via[B] & TACK) != 0) 2433 ; 2434 via[B] |= TREQ; eieio(); 2435 while ((via[B] & TACK) == 0) 2436 ; 2437 } 2438 2439 static inline void 2440 polled_send_byte(volatile unsigned char __iomem *via, int x) 2441 { 2442 via[ACR] |= SR_OUT | SR_EXT; eieio(); 2443 via[SR] = x; eieio(); 2444 polled_handshake(via); 2445 } 2446 2447 static inline int 2448 polled_recv_byte(volatile unsigned char __iomem *via) 2449 { 2450 int x; 2451 2452 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio(); 2453 x = via[SR]; eieio(); 2454 polled_handshake(via); 2455 x = via[SR]; eieio(); 2456 return x; 2457 } 2458 2459 int 2460 pmu_polled_request(struct adb_request *req) 2461 { 2462 unsigned long flags; 2463 int i, l, c; 2464 volatile unsigned char __iomem *v = via; 2465 2466 req->complete = 1; 2467 c = req->data[0]; 2468 l = pmu_data_len[c][0]; 2469 if (l >= 0 && req->nbytes != l + 1) 2470 return -EINVAL; 2471 2472 local_irq_save(flags); 2473 while (pmu_state != idle) 2474 pmu_poll(); 2475 2476 while ((via[B] & TACK) == 0) 2477 ; 2478 polled_send_byte(v, c); 2479 if (l < 0) { 2480 l = req->nbytes - 1; 2481 polled_send_byte(v, l); 2482 } 2483 for (i = 1; i <= l; ++i) 2484 polled_send_byte(v, req->data[i]); 2485 2486 l = pmu_data_len[c][1]; 2487 if (l < 0) 2488 l = polled_recv_byte(v); 2489 for (i = 0; i < l; ++i) 2490 req->reply[i + req->reply_len] = polled_recv_byte(v); 2491 2492 if (req->done) 2493 (*req->done)(req); 2494 2495 local_irq_restore(flags); 2496 return 0; 2497 } 2498 2499 /* N.B. This doesn't work on the 3400 */ 2500 void pmu_blink(int n) 2501 { 2502 struct adb_request req; 2503 2504 memset(&req, 0, sizeof(req)); 2505 2506 for (; n > 0; --n) { 2507 req.nbytes = 4; 2508 req.done = NULL; 2509 req.data[0] = 0xee; 2510 req.data[1] = 4; 2511 req.data[2] = 0; 2512 req.data[3] = 1; 2513 req.reply[0] = ADB_RET_OK; 2514 req.reply_len = 1; 2515 req.reply_expected = 0; 2516 pmu_polled_request(&req); 2517 mdelay(50); 2518 req.nbytes = 4; 2519 req.done = NULL; 2520 req.data[0] = 0xee; 2521 req.data[1] = 4; 2522 req.data[2] = 0; 2523 req.data[3] = 0; 2524 req.reply[0] = ADB_RET_OK; 2525 req.reply_len = 1; 2526 req.reply_expected = 0; 2527 pmu_polled_request(&req); 2528 mdelay(50); 2529 } 2530 mdelay(50); 2531 } 2532 #endif /* DEBUG_SLEEP */ 2533 2534 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 2535 int pmu_sys_suspended; 2536 2537 static int pmu_syscore_suspend(void) 2538 { 2539 /* Suspend PMU event interrupts */ 2540 pmu_suspend(); 2541 pmu_sys_suspended = 1; 2542 2543 #ifdef CONFIG_PMAC_BACKLIGHT 2544 /* Tell backlight code not to muck around with the chip anymore */ 2545 pmu_backlight_set_sleep(1); 2546 #endif 2547 2548 return 0; 2549 } 2550 2551 static void pmu_syscore_resume(void) 2552 { 2553 struct adb_request req; 2554 2555 if (!pmu_sys_suspended) 2556 return; 2557 2558 /* Tell PMU we are ready */ 2559 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2560 pmu_wait_complete(&req); 2561 2562 #ifdef CONFIG_PMAC_BACKLIGHT 2563 /* Tell backlight code it can use the chip again */ 2564 pmu_backlight_set_sleep(0); 2565 #endif 2566 /* Resume PMU event interrupts */ 2567 pmu_resume(); 2568 pmu_sys_suspended = 0; 2569 } 2570 2571 static struct syscore_ops pmu_syscore_ops = { 2572 .suspend = pmu_syscore_suspend, 2573 .resume = pmu_syscore_resume, 2574 }; 2575 2576 static int pmu_syscore_register(void) 2577 { 2578 register_syscore_ops(&pmu_syscore_ops); 2579 2580 return 0; 2581 } 2582 subsys_initcall(pmu_syscore_register); 2583 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2584 2585 EXPORT_SYMBOL(pmu_request); 2586 EXPORT_SYMBOL(pmu_queue_request); 2587 EXPORT_SYMBOL(pmu_poll); 2588 EXPORT_SYMBOL(pmu_poll_adb); 2589 EXPORT_SYMBOL(pmu_wait_complete); 2590 EXPORT_SYMBOL(pmu_suspend); 2591 EXPORT_SYMBOL(pmu_resume); 2592 EXPORT_SYMBOL(pmu_unlock); 2593 #if defined(CONFIG_PPC32) 2594 EXPORT_SYMBOL(pmu_enable_irled); 2595 EXPORT_SYMBOL(pmu_battery_count); 2596 EXPORT_SYMBOL(pmu_batteries); 2597 EXPORT_SYMBOL(pmu_power_flags); 2598 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2599 2600