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 int pmu_info_proc_show(struct seq_file *m, void *v); 195 static int pmu_irqstats_proc_show(struct seq_file *m, void *v); 196 static int pmu_battery_proc_show(struct seq_file *m, void *v); 197 static void pmu_pass_intr(unsigned char *data, int len); 198 static const struct file_operations pmu_options_proc_fops; 199 200 #ifdef CONFIG_ADB 201 const struct adb_driver via_pmu_driver = { 202 .name = "PMU", 203 .probe = pmu_probe, 204 .init = pmu_init, 205 .send_request = pmu_send_request, 206 .autopoll = pmu_adb_autopoll, 207 .poll = pmu_poll_adb, 208 .reset_bus = 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) 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_single_data(title, 0, 515 proc_pmu_root, pmu_battery_proc_show, 516 (void *)i); 517 } 518 519 proc_pmu_info = proc_create_single("info", 0, proc_pmu_root, 520 pmu_info_proc_show); 521 proc_pmu_irqstats = proc_create_single("interrupts", 0, 522 proc_pmu_root, pmu_irqstats_proc_show); 523 proc_pmu_options = proc_create("options", 0600, proc_pmu_root, 524 &pmu_options_proc_fops); 525 } 526 return 0; 527 } 528 529 device_initcall(via_pmu_dev_init); 530 531 static int 532 init_pmu(void) 533 { 534 int timeout; 535 struct adb_request req; 536 537 out_8(&via[B], via[B] | TREQ); /* negate TREQ */ 538 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */ 539 540 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 541 timeout = 100000; 542 while (!req.complete) { 543 if (--timeout < 0) { 544 printk(KERN_ERR "init_pmu: no response from PMU\n"); 545 return 0; 546 } 547 udelay(10); 548 pmu_poll(); 549 } 550 551 /* ack all pending interrupts */ 552 timeout = 100000; 553 interrupt_data[0][0] = 1; 554 while (interrupt_data[0][0] || pmu_state != idle) { 555 if (--timeout < 0) { 556 printk(KERN_ERR "init_pmu: timed out acking intrs\n"); 557 return 0; 558 } 559 if (pmu_state == idle) 560 adb_int_pending = 1; 561 via_pmu_interrupt(0, NULL); 562 udelay(10); 563 } 564 565 /* Tell PMU we are ready. */ 566 if (pmu_kind == PMU_KEYLARGO_BASED) { 567 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 568 while (!req.complete) 569 pmu_poll(); 570 } 571 572 /* Read PMU version */ 573 pmu_request(&req, NULL, 1, PMU_GET_VERSION); 574 pmu_wait_complete(&req); 575 if (req.reply_len > 0) 576 pmu_version = req.reply[0]; 577 578 /* Read server mode setting */ 579 if (pmu_kind == PMU_KEYLARGO_BASED) { 580 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, 581 PMU_PWR_GET_POWERUP_EVENTS); 582 pmu_wait_complete(&req); 583 if (req.reply_len == 2) { 584 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT) 585 option_server_mode = 1; 586 printk(KERN_INFO "via-pmu: Server Mode is %s\n", 587 option_server_mode ? "enabled" : "disabled"); 588 } 589 } 590 return 1; 591 } 592 593 int 594 pmu_get_model(void) 595 { 596 return pmu_kind; 597 } 598 599 static void pmu_set_server_mode(int server_mode) 600 { 601 struct adb_request req; 602 603 if (pmu_kind != PMU_KEYLARGO_BASED) 604 return; 605 606 option_server_mode = server_mode; 607 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS); 608 pmu_wait_complete(&req); 609 if (req.reply_len < 2) 610 return; 611 if (server_mode) 612 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 613 PMU_PWR_SET_POWERUP_EVENTS, 614 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 615 else 616 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 617 PMU_PWR_CLR_POWERUP_EVENTS, 618 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 619 pmu_wait_complete(&req); 620 } 621 622 /* This new version of the code for 2400/3400/3500 powerbooks 623 * is inspired from the implementation in gkrellm-pmu 624 */ 625 static void 626 done_battery_state_ohare(struct adb_request* req) 627 { 628 /* format: 629 * [0] : flags 630 * 0x01 : AC indicator 631 * 0x02 : charging 632 * 0x04 : battery exist 633 * 0x08 : 634 * 0x10 : 635 * 0x20 : full charged 636 * 0x40 : pcharge reset 637 * 0x80 : battery exist 638 * 639 * [1][2] : battery voltage 640 * [3] : CPU temperature 641 * [4] : battery temperature 642 * [5] : current 643 * [6][7] : pcharge 644 * --tkoba 645 */ 646 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER; 647 long pcharge, charge, vb, vmax, lmax; 648 long vmax_charging, vmax_charged; 649 long amperage, voltage, time, max; 650 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 651 NULL, PMAC_MB_INFO_MODEL, 0); 652 653 if (req->reply[0] & 0x01) 654 pmu_power_flags |= PMU_PWR_AC_PRESENT; 655 else 656 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 657 658 if (mb == PMAC_TYPE_COMET) { 659 vmax_charged = 189; 660 vmax_charging = 213; 661 lmax = 6500; 662 } else { 663 vmax_charged = 330; 664 vmax_charging = 330; 665 lmax = 6500; 666 } 667 vmax = vmax_charged; 668 669 /* If battery installed */ 670 if (req->reply[0] & 0x04) { 671 bat_flags |= PMU_BATT_PRESENT; 672 if (req->reply[0] & 0x02) 673 bat_flags |= PMU_BATT_CHARGING; 674 vb = (req->reply[1] << 8) | req->reply[2]; 675 voltage = (vb * 265 + 72665) / 10; 676 amperage = req->reply[5]; 677 if ((req->reply[0] & 0x01) == 0) { 678 if (amperage > 200) 679 vb += ((amperage - 200) * 15)/100; 680 } else if (req->reply[0] & 0x02) { 681 vb = (vb * 97) / 100; 682 vmax = vmax_charging; 683 } 684 charge = (100 * vb) / vmax; 685 if (req->reply[0] & 0x40) { 686 pcharge = (req->reply[6] << 8) + req->reply[7]; 687 if (pcharge > lmax) 688 pcharge = lmax; 689 pcharge *= 100; 690 pcharge = 100 - pcharge / lmax; 691 if (pcharge < charge) 692 charge = pcharge; 693 } 694 if (amperage > 0) 695 time = (charge * 16440) / amperage; 696 else 697 time = 0; 698 max = 100; 699 amperage = -amperage; 700 } else 701 charge = max = amperage = voltage = time = 0; 702 703 pmu_batteries[pmu_cur_battery].flags = bat_flags; 704 pmu_batteries[pmu_cur_battery].charge = charge; 705 pmu_batteries[pmu_cur_battery].max_charge = max; 706 pmu_batteries[pmu_cur_battery].amperage = amperage; 707 pmu_batteries[pmu_cur_battery].voltage = voltage; 708 pmu_batteries[pmu_cur_battery].time_remaining = time; 709 710 clear_bit(0, &async_req_locks); 711 } 712 713 static void 714 done_battery_state_smart(struct adb_request* req) 715 { 716 /* format: 717 * [0] : format of this structure (known: 3,4,5) 718 * [1] : flags 719 * 720 * format 3 & 4: 721 * 722 * [2] : charge 723 * [3] : max charge 724 * [4] : current 725 * [5] : voltage 726 * 727 * format 5: 728 * 729 * [2][3] : charge 730 * [4][5] : max charge 731 * [6][7] : current 732 * [8][9] : voltage 733 */ 734 735 unsigned int bat_flags = PMU_BATT_TYPE_SMART; 736 int amperage; 737 unsigned int capa, max, voltage; 738 739 if (req->reply[1] & 0x01) 740 pmu_power_flags |= PMU_PWR_AC_PRESENT; 741 else 742 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 743 744 745 capa = max = amperage = voltage = 0; 746 747 if (req->reply[1] & 0x04) { 748 bat_flags |= PMU_BATT_PRESENT; 749 switch(req->reply[0]) { 750 case 3: 751 case 4: capa = req->reply[2]; 752 max = req->reply[3]; 753 amperage = *((signed char *)&req->reply[4]); 754 voltage = req->reply[5]; 755 break; 756 case 5: capa = (req->reply[2] << 8) | req->reply[3]; 757 max = (req->reply[4] << 8) | req->reply[5]; 758 amperage = *((signed short *)&req->reply[6]); 759 voltage = (req->reply[8] << 8) | req->reply[9]; 760 break; 761 default: 762 pr_warn("pmu.c: unrecognized battery info, " 763 "len: %d, %4ph\n", req->reply_len, 764 req->reply); 765 break; 766 } 767 } 768 769 if ((req->reply[1] & 0x01) && (amperage > 0)) 770 bat_flags |= PMU_BATT_CHARGING; 771 772 pmu_batteries[pmu_cur_battery].flags = bat_flags; 773 pmu_batteries[pmu_cur_battery].charge = capa; 774 pmu_batteries[pmu_cur_battery].max_charge = max; 775 pmu_batteries[pmu_cur_battery].amperage = amperage; 776 pmu_batteries[pmu_cur_battery].voltage = voltage; 777 if (amperage) { 778 if ((req->reply[1] & 0x01) && (amperage > 0)) 779 pmu_batteries[pmu_cur_battery].time_remaining 780 = ((max-capa) * 3600) / amperage; 781 else 782 pmu_batteries[pmu_cur_battery].time_remaining 783 = (capa * 3600) / (-amperage); 784 } else 785 pmu_batteries[pmu_cur_battery].time_remaining = 0; 786 787 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count; 788 789 clear_bit(0, &async_req_locks); 790 } 791 792 static void 793 query_battery_state(void) 794 { 795 if (test_and_set_bit(0, &async_req_locks)) 796 return; 797 if (pmu_kind == PMU_OHARE_BASED) 798 pmu_request(&batt_req, done_battery_state_ohare, 799 1, PMU_BATTERY_STATE); 800 else 801 pmu_request(&batt_req, done_battery_state_smart, 802 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1); 803 } 804 805 static int pmu_info_proc_show(struct seq_file *m, void *v) 806 { 807 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION); 808 seq_printf(m, "PMU firmware version : %02x\n", pmu_version); 809 seq_printf(m, "AC Power : %d\n", 810 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0); 811 seq_printf(m, "Battery count : %d\n", pmu_battery_count); 812 813 return 0; 814 } 815 816 static int pmu_irqstats_proc_show(struct seq_file *m, void *v) 817 { 818 int i; 819 static const char *irq_names[] = { 820 "Total CB1 triggered events", 821 "Total GPIO1 triggered events", 822 "PC-Card eject button", 823 "Sound/Brightness button", 824 "ADB message", 825 "Battery state change", 826 "Environment interrupt", 827 "Tick timer", 828 "Ghost interrupt (zero len)", 829 "Empty interrupt (empty mask)", 830 "Max irqs in a row" 831 }; 832 833 for (i=0; i<11; i++) { 834 seq_printf(m, " %2u: %10u (%s)\n", 835 i, pmu_irq_stats[i], irq_names[i]); 836 } 837 return 0; 838 } 839 840 static int pmu_battery_proc_show(struct seq_file *m, void *v) 841 { 842 long batnum = (long)m->private; 843 844 seq_putc(m, '\n'); 845 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags); 846 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge); 847 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge); 848 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage); 849 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage); 850 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining); 851 return 0; 852 } 853 854 static int pmu_options_proc_show(struct seq_file *m, void *v) 855 { 856 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 857 if (pmu_kind == PMU_KEYLARGO_BASED && 858 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 859 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup); 860 #endif 861 if (pmu_kind == PMU_KEYLARGO_BASED) 862 seq_printf(m, "server_mode=%d\n", option_server_mode); 863 864 return 0; 865 } 866 867 static int pmu_options_proc_open(struct inode *inode, struct file *file) 868 { 869 return single_open(file, pmu_options_proc_show, NULL); 870 } 871 872 static ssize_t pmu_options_proc_write(struct file *file, 873 const char __user *buffer, size_t count, loff_t *pos) 874 { 875 char tmp[33]; 876 char *label, *val; 877 size_t fcount = count; 878 879 if (!count) 880 return -EINVAL; 881 if (count > 32) 882 count = 32; 883 if (copy_from_user(tmp, buffer, count)) 884 return -EFAULT; 885 tmp[count] = 0; 886 887 label = tmp; 888 while(*label == ' ') 889 label++; 890 val = label; 891 while(*val && (*val != '=')) { 892 if (*val == ' ') 893 *val = 0; 894 val++; 895 } 896 if ((*val) == 0) 897 return -EINVAL; 898 *(val++) = 0; 899 while(*val == ' ') 900 val++; 901 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 902 if (pmu_kind == PMU_KEYLARGO_BASED && 903 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 904 if (!strcmp(label, "lid_wakeup")) 905 option_lid_wakeup = ((*val) == '1'); 906 #endif 907 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) { 908 int new_value; 909 new_value = ((*val) == '1'); 910 if (new_value != option_server_mode) 911 pmu_set_server_mode(new_value); 912 } 913 return fcount; 914 } 915 916 static const struct file_operations pmu_options_proc_fops = { 917 .owner = THIS_MODULE, 918 .open = pmu_options_proc_open, 919 .read = seq_read, 920 .llseek = seq_lseek, 921 .release = single_release, 922 .write = pmu_options_proc_write, 923 }; 924 925 #ifdef CONFIG_ADB 926 /* Send an ADB command */ 927 static int pmu_send_request(struct adb_request *req, int sync) 928 { 929 int i, ret; 930 931 if ((vias == NULL) || (!pmu_fully_inited)) { 932 req->complete = 1; 933 return -ENXIO; 934 } 935 936 ret = -EINVAL; 937 938 switch (req->data[0]) { 939 case PMU_PACKET: 940 for (i = 0; i < req->nbytes - 1; ++i) 941 req->data[i] = req->data[i+1]; 942 --req->nbytes; 943 if (pmu_data_len[req->data[0]][1] != 0) { 944 req->reply[0] = ADB_RET_OK; 945 req->reply_len = 1; 946 } else 947 req->reply_len = 0; 948 ret = pmu_queue_request(req); 949 break; 950 case CUDA_PACKET: 951 switch (req->data[1]) { 952 case CUDA_GET_TIME: 953 if (req->nbytes != 2) 954 break; 955 req->data[0] = PMU_READ_RTC; 956 req->nbytes = 1; 957 req->reply_len = 3; 958 req->reply[0] = CUDA_PACKET; 959 req->reply[1] = 0; 960 req->reply[2] = CUDA_GET_TIME; 961 ret = pmu_queue_request(req); 962 break; 963 case CUDA_SET_TIME: 964 if (req->nbytes != 6) 965 break; 966 req->data[0] = PMU_SET_RTC; 967 req->nbytes = 5; 968 for (i = 1; i <= 4; ++i) 969 req->data[i] = req->data[i+1]; 970 req->reply_len = 3; 971 req->reply[0] = CUDA_PACKET; 972 req->reply[1] = 0; 973 req->reply[2] = CUDA_SET_TIME; 974 ret = pmu_queue_request(req); 975 break; 976 } 977 break; 978 case ADB_PACKET: 979 if (!pmu_has_adb) 980 return -ENXIO; 981 for (i = req->nbytes - 1; i > 1; --i) 982 req->data[i+2] = req->data[i]; 983 req->data[3] = req->nbytes - 2; 984 req->data[2] = pmu_adb_flags; 985 /*req->data[1] = req->data[1];*/ 986 req->data[0] = PMU_ADB_CMD; 987 req->nbytes += 2; 988 req->reply_expected = 1; 989 req->reply_len = 0; 990 ret = pmu_queue_request(req); 991 break; 992 } 993 if (ret) { 994 req->complete = 1; 995 return ret; 996 } 997 998 if (sync) 999 while (!req->complete) 1000 pmu_poll(); 1001 1002 return 0; 1003 } 1004 1005 /* Enable/disable autopolling */ 1006 static int __pmu_adb_autopoll(int devs) 1007 { 1008 struct adb_request req; 1009 1010 if (devs) { 1011 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86, 1012 adb_dev_map >> 8, adb_dev_map); 1013 pmu_adb_flags = 2; 1014 } else { 1015 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF); 1016 pmu_adb_flags = 0; 1017 } 1018 while (!req.complete) 1019 pmu_poll(); 1020 return 0; 1021 } 1022 1023 static int pmu_adb_autopoll(int devs) 1024 { 1025 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1026 return -ENXIO; 1027 1028 adb_dev_map = devs; 1029 return __pmu_adb_autopoll(devs); 1030 } 1031 1032 /* Reset the ADB bus */ 1033 static int pmu_adb_reset_bus(void) 1034 { 1035 struct adb_request req; 1036 int save_autopoll = adb_dev_map; 1037 1038 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1039 return -ENXIO; 1040 1041 /* anyone got a better idea?? */ 1042 __pmu_adb_autopoll(0); 1043 1044 req.nbytes = 4; 1045 req.done = NULL; 1046 req.data[0] = PMU_ADB_CMD; 1047 req.data[1] = ADB_BUSRESET; 1048 req.data[2] = 0; 1049 req.data[3] = 0; 1050 req.data[4] = 0; 1051 req.reply_len = 0; 1052 req.reply_expected = 1; 1053 if (pmu_queue_request(&req) != 0) { 1054 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n"); 1055 return -EIO; 1056 } 1057 pmu_wait_complete(&req); 1058 1059 if (save_autopoll != 0) 1060 __pmu_adb_autopoll(save_autopoll); 1061 1062 return 0; 1063 } 1064 #endif /* CONFIG_ADB */ 1065 1066 /* Construct and send a pmu request */ 1067 int 1068 pmu_request(struct adb_request *req, void (*done)(struct adb_request *), 1069 int nbytes, ...) 1070 { 1071 va_list list; 1072 int i; 1073 1074 if (vias == NULL) 1075 return -ENXIO; 1076 1077 if (nbytes < 0 || nbytes > 32) { 1078 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes); 1079 req->complete = 1; 1080 return -EINVAL; 1081 } 1082 req->nbytes = nbytes; 1083 req->done = done; 1084 va_start(list, nbytes); 1085 for (i = 0; i < nbytes; ++i) 1086 req->data[i] = va_arg(list, int); 1087 va_end(list); 1088 req->reply_len = 0; 1089 req->reply_expected = 0; 1090 return pmu_queue_request(req); 1091 } 1092 1093 int 1094 pmu_queue_request(struct adb_request *req) 1095 { 1096 unsigned long flags; 1097 int nsend; 1098 1099 if (via == NULL) { 1100 req->complete = 1; 1101 return -ENXIO; 1102 } 1103 if (req->nbytes <= 0) { 1104 req->complete = 1; 1105 return 0; 1106 } 1107 nsend = pmu_data_len[req->data[0]][0]; 1108 if (nsend >= 0 && req->nbytes != nsend + 1) { 1109 req->complete = 1; 1110 return -EINVAL; 1111 } 1112 1113 req->next = NULL; 1114 req->sent = 0; 1115 req->complete = 0; 1116 1117 spin_lock_irqsave(&pmu_lock, flags); 1118 if (current_req) { 1119 last_req->next = req; 1120 last_req = req; 1121 } else { 1122 current_req = req; 1123 last_req = req; 1124 if (pmu_state == idle) 1125 pmu_start(); 1126 } 1127 spin_unlock_irqrestore(&pmu_lock, flags); 1128 1129 return 0; 1130 } 1131 1132 static inline void 1133 wait_for_ack(void) 1134 { 1135 /* Sightly increased the delay, I had one occurrence of the message 1136 * reported 1137 */ 1138 int timeout = 4000; 1139 while ((in_8(&via[B]) & TACK) == 0) { 1140 if (--timeout < 0) { 1141 printk(KERN_ERR "PMU not responding (!ack)\n"); 1142 return; 1143 } 1144 udelay(10); 1145 } 1146 } 1147 1148 /* New PMU seems to be very sensitive to those timings, so we make sure 1149 * PCI is flushed immediately */ 1150 static inline void 1151 send_byte(int x) 1152 { 1153 volatile unsigned char __iomem *v = via; 1154 1155 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT); 1156 out_8(&v[SR], x); 1157 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */ 1158 (void)in_8(&v[B]); 1159 } 1160 1161 static inline void 1162 recv_byte(void) 1163 { 1164 volatile unsigned char __iomem *v = via; 1165 1166 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT); 1167 in_8(&v[SR]); /* resets SR */ 1168 out_8(&v[B], in_8(&v[B]) & ~TREQ); 1169 (void)in_8(&v[B]); 1170 } 1171 1172 static inline void 1173 pmu_done(struct adb_request *req) 1174 { 1175 void (*done)(struct adb_request *) = req->done; 1176 mb(); 1177 req->complete = 1; 1178 /* Here, we assume that if the request has a done member, the 1179 * struct request will survive to setting req->complete to 1 1180 */ 1181 if (done) 1182 (*done)(req); 1183 } 1184 1185 static void 1186 pmu_start(void) 1187 { 1188 struct adb_request *req; 1189 1190 /* assert pmu_state == idle */ 1191 /* get the packet to send */ 1192 req = current_req; 1193 if (!req || pmu_state != idle 1194 || (/*req->reply_expected && */req_awaiting_reply)) 1195 return; 1196 1197 pmu_state = sending; 1198 data_index = 1; 1199 data_len = pmu_data_len[req->data[0]][0]; 1200 1201 /* Sounds safer to make sure ACK is high before writing. This helped 1202 * kill a problem with ADB and some iBooks 1203 */ 1204 wait_for_ack(); 1205 /* set the shift register to shift out and send a byte */ 1206 send_byte(req->data[0]); 1207 } 1208 1209 void 1210 pmu_poll(void) 1211 { 1212 if (!via) 1213 return; 1214 if (disable_poll) 1215 return; 1216 via_pmu_interrupt(0, NULL); 1217 } 1218 1219 void 1220 pmu_poll_adb(void) 1221 { 1222 if (!via) 1223 return; 1224 if (disable_poll) 1225 return; 1226 /* Kicks ADB read when PMU is suspended */ 1227 adb_int_pending = 1; 1228 do { 1229 via_pmu_interrupt(0, NULL); 1230 } while (pmu_suspended && (adb_int_pending || pmu_state != idle 1231 || req_awaiting_reply)); 1232 } 1233 1234 void 1235 pmu_wait_complete(struct adb_request *req) 1236 { 1237 if (!via) 1238 return; 1239 while((pmu_state != idle && pmu_state != locked) || !req->complete) 1240 via_pmu_interrupt(0, NULL); 1241 } 1242 1243 /* This function loops until the PMU is idle and prevents it from 1244 * anwsering to ADB interrupts. pmu_request can still be called. 1245 * This is done to avoid spurrious shutdowns when we know we'll have 1246 * interrupts switched off for a long time 1247 */ 1248 void 1249 pmu_suspend(void) 1250 { 1251 unsigned long flags; 1252 1253 if (!via) 1254 return; 1255 1256 spin_lock_irqsave(&pmu_lock, flags); 1257 pmu_suspended++; 1258 if (pmu_suspended > 1) { 1259 spin_unlock_irqrestore(&pmu_lock, flags); 1260 return; 1261 } 1262 1263 do { 1264 spin_unlock_irqrestore(&pmu_lock, flags); 1265 if (req_awaiting_reply) 1266 adb_int_pending = 1; 1267 via_pmu_interrupt(0, NULL); 1268 spin_lock_irqsave(&pmu_lock, flags); 1269 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) { 1270 if (gpio_irq >= 0) 1271 disable_irq_nosync(gpio_irq); 1272 out_8(&via[IER], CB1_INT | IER_CLR); 1273 spin_unlock_irqrestore(&pmu_lock, flags); 1274 break; 1275 } 1276 } while (1); 1277 } 1278 1279 void 1280 pmu_resume(void) 1281 { 1282 unsigned long flags; 1283 1284 if (!via || (pmu_suspended < 1)) 1285 return; 1286 1287 spin_lock_irqsave(&pmu_lock, flags); 1288 pmu_suspended--; 1289 if (pmu_suspended > 0) { 1290 spin_unlock_irqrestore(&pmu_lock, flags); 1291 return; 1292 } 1293 adb_int_pending = 1; 1294 if (gpio_irq >= 0) 1295 enable_irq(gpio_irq); 1296 out_8(&via[IER], CB1_INT | IER_SET); 1297 spin_unlock_irqrestore(&pmu_lock, flags); 1298 pmu_poll(); 1299 } 1300 1301 /* Interrupt data could be the result data from an ADB cmd */ 1302 static void 1303 pmu_handle_data(unsigned char *data, int len) 1304 { 1305 unsigned char ints, pirq; 1306 int i = 0; 1307 1308 asleep = 0; 1309 if (drop_interrupts || len < 1) { 1310 adb_int_pending = 0; 1311 pmu_irq_stats[8]++; 1312 return; 1313 } 1314 1315 /* Get PMU interrupt mask */ 1316 ints = data[0]; 1317 1318 /* Record zero interrupts for stats */ 1319 if (ints == 0) 1320 pmu_irq_stats[9]++; 1321 1322 /* Hack to deal with ADB autopoll flag */ 1323 if (ints & PMU_INT_ADB) 1324 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL); 1325 1326 next: 1327 1328 if (ints == 0) { 1329 if (i > pmu_irq_stats[10]) 1330 pmu_irq_stats[10] = i; 1331 return; 1332 } 1333 1334 for (pirq = 0; pirq < 8; pirq++) 1335 if (ints & (1 << pirq)) 1336 break; 1337 pmu_irq_stats[pirq]++; 1338 i++; 1339 ints &= ~(1 << pirq); 1340 1341 /* Note: for some reason, we get an interrupt with len=1, 1342 * data[0]==0 after each normal ADB interrupt, at least 1343 * on the Pismo. Still investigating... --BenH 1344 */ 1345 if ((1 << pirq) & PMU_INT_ADB) { 1346 if ((data[0] & PMU_INT_ADB_AUTO) == 0) { 1347 struct adb_request *req = req_awaiting_reply; 1348 if (!req) { 1349 printk(KERN_ERR "PMU: extra ADB reply\n"); 1350 return; 1351 } 1352 req_awaiting_reply = NULL; 1353 if (len <= 2) 1354 req->reply_len = 0; 1355 else { 1356 memcpy(req->reply, data + 1, len - 1); 1357 req->reply_len = len - 1; 1358 } 1359 pmu_done(req); 1360 } else { 1361 if (len == 4 && data[1] == 0x2c) { 1362 extern int xmon_wants_key, xmon_adb_keycode; 1363 if (xmon_wants_key) { 1364 xmon_adb_keycode = data[2]; 1365 return; 1366 } 1367 } 1368 #ifdef CONFIG_ADB 1369 /* 1370 * XXX On the [23]400 the PMU gives us an up 1371 * event for keycodes 0x74 or 0x75 when the PC 1372 * card eject buttons are released, so we 1373 * ignore those events. 1374 */ 1375 if (!(pmu_kind == PMU_OHARE_BASED && len == 4 1376 && data[1] == 0x2c && data[3] == 0xff 1377 && (data[2] & ~1) == 0xf4)) 1378 adb_input(data+1, len-1, 1); 1379 #endif /* CONFIG_ADB */ 1380 } 1381 } 1382 /* Sound/brightness button pressed */ 1383 else if ((1 << pirq) & PMU_INT_SNDBRT) { 1384 #ifdef CONFIG_PMAC_BACKLIGHT 1385 if (len == 3) 1386 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4); 1387 #endif 1388 } 1389 /* Tick interrupt */ 1390 else if ((1 << pirq) & PMU_INT_TICK) { 1391 /* Environement or tick interrupt, query batteries */ 1392 if (pmu_battery_count) { 1393 if ((--query_batt_timer) == 0) { 1394 query_battery_state(); 1395 query_batt_timer = BATTERY_POLLING_COUNT; 1396 } 1397 } 1398 } 1399 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) { 1400 if (pmu_battery_count) 1401 query_battery_state(); 1402 pmu_pass_intr(data, len); 1403 /* len == 6 is probably a bad check. But how do I 1404 * know what PMU versions send what events here? */ 1405 if (len == 6) { 1406 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8)); 1407 via_pmu_event(PMU_EVT_LID, data[1]&1); 1408 } 1409 } else { 1410 pmu_pass_intr(data, len); 1411 } 1412 goto next; 1413 } 1414 1415 static struct adb_request* 1416 pmu_sr_intr(void) 1417 { 1418 struct adb_request *req; 1419 int bite = 0; 1420 1421 if (via[B] & TREQ) { 1422 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]); 1423 out_8(&via[IFR], SR_INT); 1424 return NULL; 1425 } 1426 /* The ack may not yet be low when we get the interrupt */ 1427 while ((in_8(&via[B]) & TACK) != 0) 1428 ; 1429 1430 /* if reading grab the byte, and reset the interrupt */ 1431 if (pmu_state == reading || pmu_state == reading_intr) 1432 bite = in_8(&via[SR]); 1433 1434 /* reset TREQ and wait for TACK to go high */ 1435 out_8(&via[B], in_8(&via[B]) | TREQ); 1436 wait_for_ack(); 1437 1438 switch (pmu_state) { 1439 case sending: 1440 req = current_req; 1441 if (data_len < 0) { 1442 data_len = req->nbytes - 1; 1443 send_byte(data_len); 1444 break; 1445 } 1446 if (data_index <= data_len) { 1447 send_byte(req->data[data_index++]); 1448 break; 1449 } 1450 req->sent = 1; 1451 data_len = pmu_data_len[req->data[0]][1]; 1452 if (data_len == 0) { 1453 pmu_state = idle; 1454 current_req = req->next; 1455 if (req->reply_expected) 1456 req_awaiting_reply = req; 1457 else 1458 return req; 1459 } else { 1460 pmu_state = reading; 1461 data_index = 0; 1462 reply_ptr = req->reply + req->reply_len; 1463 recv_byte(); 1464 } 1465 break; 1466 1467 case intack: 1468 data_index = 0; 1469 data_len = -1; 1470 pmu_state = reading_intr; 1471 reply_ptr = interrupt_data[int_data_last]; 1472 recv_byte(); 1473 if (gpio_irq >= 0 && !gpio_irq_enabled) { 1474 enable_irq(gpio_irq); 1475 gpio_irq_enabled = 1; 1476 } 1477 break; 1478 1479 case reading: 1480 case reading_intr: 1481 if (data_len == -1) { 1482 data_len = bite; 1483 if (bite > 32) 1484 printk(KERN_ERR "PMU: bad reply len %d\n", bite); 1485 } else if (data_index < 32) { 1486 reply_ptr[data_index++] = bite; 1487 } 1488 if (data_index < data_len) { 1489 recv_byte(); 1490 break; 1491 } 1492 1493 if (pmu_state == reading_intr) { 1494 pmu_state = idle; 1495 int_data_state[int_data_last] = int_data_ready; 1496 interrupt_data_len[int_data_last] = data_len; 1497 } else { 1498 req = current_req; 1499 /* 1500 * For PMU sleep and freq change requests, we lock the 1501 * PMU until it's explicitly unlocked. This avoids any 1502 * spurrious event polling getting in 1503 */ 1504 current_req = req->next; 1505 req->reply_len += data_index; 1506 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED) 1507 pmu_state = locked; 1508 else 1509 pmu_state = idle; 1510 return req; 1511 } 1512 break; 1513 1514 default: 1515 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n", 1516 pmu_state); 1517 } 1518 return NULL; 1519 } 1520 1521 static irqreturn_t 1522 via_pmu_interrupt(int irq, void *arg) 1523 { 1524 unsigned long flags; 1525 int intr; 1526 int nloop = 0; 1527 int int_data = -1; 1528 struct adb_request *req = NULL; 1529 int handled = 0; 1530 1531 /* This is a bit brutal, we can probably do better */ 1532 spin_lock_irqsave(&pmu_lock, flags); 1533 ++disable_poll; 1534 1535 for (;;) { 1536 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT); 1537 if (intr == 0) 1538 break; 1539 handled = 1; 1540 if (++nloop > 1000) { 1541 printk(KERN_DEBUG "PMU: stuck in intr loop, " 1542 "intr=%x, ier=%x pmu_state=%d\n", 1543 intr, in_8(&via[IER]), pmu_state); 1544 break; 1545 } 1546 out_8(&via[IFR], intr); 1547 if (intr & CB1_INT) { 1548 adb_int_pending = 1; 1549 pmu_irq_stats[0]++; 1550 } 1551 if (intr & SR_INT) { 1552 req = pmu_sr_intr(); 1553 if (req) 1554 break; 1555 } 1556 } 1557 1558 recheck: 1559 if (pmu_state == idle) { 1560 if (adb_int_pending) { 1561 if (int_data_state[0] == int_data_empty) 1562 int_data_last = 0; 1563 else if (int_data_state[1] == int_data_empty) 1564 int_data_last = 1; 1565 else 1566 goto no_free_slot; 1567 pmu_state = intack; 1568 int_data_state[int_data_last] = int_data_fill; 1569 /* Sounds safer to make sure ACK is high before writing. 1570 * This helped kill a problem with ADB and some iBooks 1571 */ 1572 wait_for_ack(); 1573 send_byte(PMU_INT_ACK); 1574 adb_int_pending = 0; 1575 } else if (current_req) 1576 pmu_start(); 1577 } 1578 no_free_slot: 1579 /* Mark the oldest buffer for flushing */ 1580 if (int_data_state[!int_data_last] == int_data_ready) { 1581 int_data_state[!int_data_last] = int_data_flush; 1582 int_data = !int_data_last; 1583 } else if (int_data_state[int_data_last] == int_data_ready) { 1584 int_data_state[int_data_last] = int_data_flush; 1585 int_data = int_data_last; 1586 } 1587 --disable_poll; 1588 spin_unlock_irqrestore(&pmu_lock, flags); 1589 1590 /* Deal with completed PMU requests outside of the lock */ 1591 if (req) { 1592 pmu_done(req); 1593 req = NULL; 1594 } 1595 1596 /* Deal with interrupt datas outside of the lock */ 1597 if (int_data >= 0) { 1598 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]); 1599 spin_lock_irqsave(&pmu_lock, flags); 1600 ++disable_poll; 1601 int_data_state[int_data] = int_data_empty; 1602 int_data = -1; 1603 goto recheck; 1604 } 1605 1606 return IRQ_RETVAL(handled); 1607 } 1608 1609 void 1610 pmu_unlock(void) 1611 { 1612 unsigned long flags; 1613 1614 spin_lock_irqsave(&pmu_lock, flags); 1615 if (pmu_state == locked) 1616 pmu_state = idle; 1617 adb_int_pending = 1; 1618 spin_unlock_irqrestore(&pmu_lock, flags); 1619 } 1620 1621 1622 static irqreturn_t 1623 gpio1_interrupt(int irq, void *arg) 1624 { 1625 unsigned long flags; 1626 1627 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) { 1628 spin_lock_irqsave(&pmu_lock, flags); 1629 if (gpio_irq_enabled > 0) { 1630 disable_irq_nosync(gpio_irq); 1631 gpio_irq_enabled = 0; 1632 } 1633 pmu_irq_stats[1]++; 1634 adb_int_pending = 1; 1635 spin_unlock_irqrestore(&pmu_lock, flags); 1636 via_pmu_interrupt(0, NULL); 1637 return IRQ_HANDLED; 1638 } 1639 return IRQ_NONE; 1640 } 1641 1642 void 1643 pmu_enable_irled(int on) 1644 { 1645 struct adb_request req; 1646 1647 if (vias == NULL) 1648 return ; 1649 if (pmu_kind == PMU_KEYLARGO_BASED) 1650 return ; 1651 1652 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED | 1653 (on ? PMU_POW_ON : PMU_POW_OFF)); 1654 pmu_wait_complete(&req); 1655 } 1656 1657 void 1658 pmu_restart(void) 1659 { 1660 struct adb_request req; 1661 1662 if (via == NULL) 1663 return; 1664 1665 local_irq_disable(); 1666 1667 drop_interrupts = 1; 1668 1669 if (pmu_kind != PMU_KEYLARGO_BASED) { 1670 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1671 PMU_INT_TICK ); 1672 while(!req.complete) 1673 pmu_poll(); 1674 } 1675 1676 pmu_request(&req, NULL, 1, PMU_RESET); 1677 pmu_wait_complete(&req); 1678 for (;;) 1679 ; 1680 } 1681 1682 void 1683 pmu_shutdown(void) 1684 { 1685 struct adb_request req; 1686 1687 if (via == NULL) 1688 return; 1689 1690 local_irq_disable(); 1691 1692 drop_interrupts = 1; 1693 1694 if (pmu_kind != PMU_KEYLARGO_BASED) { 1695 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1696 PMU_INT_TICK ); 1697 pmu_wait_complete(&req); 1698 } else { 1699 /* Disable server mode on shutdown or we'll just 1700 * wake up again 1701 */ 1702 pmu_set_server_mode(0); 1703 } 1704 1705 pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 1706 'M', 'A', 'T', 'T'); 1707 pmu_wait_complete(&req); 1708 for (;;) 1709 ; 1710 } 1711 1712 int 1713 pmu_present(void) 1714 { 1715 return via != NULL; 1716 } 1717 1718 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 1719 /* 1720 * Put the powerbook to sleep. 1721 */ 1722 1723 static u32 save_via[8]; 1724 1725 static void 1726 save_via_state(void) 1727 { 1728 save_via[0] = in_8(&via[ANH]); 1729 save_via[1] = in_8(&via[DIRA]); 1730 save_via[2] = in_8(&via[B]); 1731 save_via[3] = in_8(&via[DIRB]); 1732 save_via[4] = in_8(&via[PCR]); 1733 save_via[5] = in_8(&via[ACR]); 1734 save_via[6] = in_8(&via[T1CL]); 1735 save_via[7] = in_8(&via[T1CH]); 1736 } 1737 static void 1738 restore_via_state(void) 1739 { 1740 out_8(&via[ANH], save_via[0]); 1741 out_8(&via[DIRA], save_via[1]); 1742 out_8(&via[B], save_via[2]); 1743 out_8(&via[DIRB], save_via[3]); 1744 out_8(&via[PCR], save_via[4]); 1745 out_8(&via[ACR], save_via[5]); 1746 out_8(&via[T1CL], save_via[6]); 1747 out_8(&via[T1CH], save_via[7]); 1748 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 1749 out_8(&via[IFR], 0x7f); /* clear IFR */ 1750 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 1751 } 1752 1753 #define GRACKLE_PM (1<<7) 1754 #define GRACKLE_DOZE (1<<5) 1755 #define GRACKLE_NAP (1<<4) 1756 #define GRACKLE_SLEEP (1<<3) 1757 1758 static int powerbook_sleep_grackle(void) 1759 { 1760 unsigned long save_l2cr; 1761 unsigned short pmcr1; 1762 struct adb_request req; 1763 struct pci_dev *grackle; 1764 1765 grackle = pci_get_domain_bus_and_slot(0, 0, 0); 1766 if (!grackle) 1767 return -ENODEV; 1768 1769 /* Turn off various things. Darwin does some retry tests here... */ 1770 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE); 1771 pmu_wait_complete(&req); 1772 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1773 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY); 1774 pmu_wait_complete(&req); 1775 1776 /* For 750, save backside cache setting and disable it */ 1777 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 1778 1779 if (!__fake_sleep) { 1780 /* Ask the PMU to put us to sleep */ 1781 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1782 pmu_wait_complete(&req); 1783 } 1784 1785 /* The VIA is supposed not to be restored correctly*/ 1786 save_via_state(); 1787 /* We shut down some HW */ 1788 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 1789 1790 pci_read_config_word(grackle, 0x70, &pmcr1); 1791 /* Apparently, MacOS uses NAP mode for Grackle ??? */ 1792 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 1793 pmcr1 |= GRACKLE_PM|GRACKLE_NAP; 1794 pci_write_config_word(grackle, 0x70, pmcr1); 1795 1796 /* Call low-level ASM sleep handler */ 1797 if (__fake_sleep) 1798 mdelay(5000); 1799 else 1800 low_sleep_handler(); 1801 1802 /* We're awake again, stop grackle PM */ 1803 pci_read_config_word(grackle, 0x70, &pmcr1); 1804 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 1805 pci_write_config_word(grackle, 0x70, pmcr1); 1806 1807 pci_dev_put(grackle); 1808 1809 /* Make sure the PMU is idle */ 1810 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 1811 restore_via_state(); 1812 1813 /* Restore L2 cache */ 1814 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 1815 _set_L2CR(save_l2cr); 1816 1817 /* Restore userland MMU context */ 1818 switch_mmu_context(NULL, current->active_mm, NULL); 1819 1820 /* Power things up */ 1821 pmu_unlock(); 1822 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1823 pmu_wait_complete(&req); 1824 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, 1825 PMU_POW0_ON|PMU_POW0_HARD_DRIVE); 1826 pmu_wait_complete(&req); 1827 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1828 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY); 1829 pmu_wait_complete(&req); 1830 1831 return 0; 1832 } 1833 1834 static int 1835 powerbook_sleep_Core99(void) 1836 { 1837 unsigned long save_l2cr; 1838 unsigned long save_l3cr; 1839 struct adb_request req; 1840 1841 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) { 1842 printk(KERN_ERR "Sleep mode not supported on this machine\n"); 1843 return -ENOSYS; 1844 } 1845 1846 if (num_online_cpus() > 1 || cpu_is_offline(0)) 1847 return -EAGAIN; 1848 1849 /* Stop environment and ADB interrupts */ 1850 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 1851 pmu_wait_complete(&req); 1852 1853 /* Tell PMU what events will wake us up */ 1854 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS, 1855 0xff, 0xff); 1856 pmu_wait_complete(&req); 1857 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS, 1858 0, PMU_PWR_WAKEUP_KEY | 1859 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0)); 1860 pmu_wait_complete(&req); 1861 1862 /* Save the state of the L2 and L3 caches */ 1863 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */ 1864 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 1865 1866 if (!__fake_sleep) { 1867 /* Ask the PMU to put us to sleep */ 1868 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1869 pmu_wait_complete(&req); 1870 } 1871 1872 /* The VIA is supposed not to be restored correctly*/ 1873 save_via_state(); 1874 1875 /* Shut down various ASICs. There's a chance that we can no longer 1876 * talk to the PMU after this, so I moved it to _after_ sending the 1877 * sleep command to it. Still need to be checked. 1878 */ 1879 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 1880 1881 /* Call low-level ASM sleep handler */ 1882 if (__fake_sleep) 1883 mdelay(5000); 1884 else 1885 low_sleep_handler(); 1886 1887 /* Restore Apple core ASICs state */ 1888 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 1889 1890 /* Restore VIA */ 1891 restore_via_state(); 1892 1893 /* tweak LPJ before cpufreq is there */ 1894 loops_per_jiffy *= 2; 1895 1896 /* Restore video */ 1897 pmac_call_early_video_resume(); 1898 1899 /* Restore L2 cache */ 1900 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 1901 _set_L2CR(save_l2cr); 1902 /* Restore L3 cache */ 1903 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0) 1904 _set_L3CR(save_l3cr); 1905 1906 /* Restore userland MMU context */ 1907 switch_mmu_context(NULL, current->active_mm, NULL); 1908 1909 /* Tell PMU we are ready */ 1910 pmu_unlock(); 1911 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 1912 pmu_wait_complete(&req); 1913 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1914 pmu_wait_complete(&req); 1915 1916 /* Restore LPJ, cpufreq will adjust the cpu frequency */ 1917 loops_per_jiffy /= 2; 1918 1919 return 0; 1920 } 1921 1922 #define PB3400_MEM_CTRL 0xf8000000 1923 #define PB3400_MEM_CTRL_SLEEP 0x70 1924 1925 static void __iomem *pb3400_mem_ctrl; 1926 1927 static void powerbook_sleep_init_3400(void) 1928 { 1929 /* map in the memory controller registers */ 1930 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100); 1931 if (pb3400_mem_ctrl == NULL) 1932 printk(KERN_WARNING "ioremap failed: sleep won't be possible"); 1933 } 1934 1935 static int powerbook_sleep_3400(void) 1936 { 1937 int i, x; 1938 unsigned int hid0; 1939 unsigned long msr; 1940 struct adb_request sleep_req; 1941 unsigned int __iomem *mem_ctrl_sleep; 1942 1943 if (pb3400_mem_ctrl == NULL) 1944 return -ENOMEM; 1945 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP; 1946 1947 /* Set the memory controller to keep the memory refreshed 1948 while we're asleep */ 1949 for (i = 0x403f; i >= 0x4000; --i) { 1950 out_be32(mem_ctrl_sleep, i); 1951 do { 1952 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff; 1953 } while (x == 0); 1954 if (x >= 0x100) 1955 break; 1956 } 1957 1958 /* Ask the PMU to put us to sleep */ 1959 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 1960 pmu_wait_complete(&sleep_req); 1961 pmu_unlock(); 1962 1963 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 1964 1965 asleep = 1; 1966 1967 /* Put the CPU into sleep mode */ 1968 hid0 = mfspr(SPRN_HID0); 1969 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP; 1970 mtspr(SPRN_HID0, hid0); 1971 local_irq_enable(); 1972 msr = mfmsr() | MSR_POW; 1973 while (asleep) { 1974 mb(); 1975 mtmsr(msr); 1976 isync(); 1977 } 1978 local_irq_disable(); 1979 1980 /* OK, we're awake again, start restoring things */ 1981 out_be32(mem_ctrl_sleep, 0x3f); 1982 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 1983 1984 return 0; 1985 } 1986 1987 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 1988 1989 /* 1990 * Support for /dev/pmu device 1991 */ 1992 #define RB_SIZE 0x10 1993 struct pmu_private { 1994 struct list_head list; 1995 int rb_get; 1996 int rb_put; 1997 struct rb_entry { 1998 unsigned short len; 1999 unsigned char data[16]; 2000 } rb_buf[RB_SIZE]; 2001 wait_queue_head_t wait; 2002 spinlock_t lock; 2003 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2004 int backlight_locker; 2005 #endif 2006 }; 2007 2008 static LIST_HEAD(all_pmu_pvt); 2009 static DEFINE_SPINLOCK(all_pvt_lock); 2010 2011 static void 2012 pmu_pass_intr(unsigned char *data, int len) 2013 { 2014 struct pmu_private *pp; 2015 struct list_head *list; 2016 int i; 2017 unsigned long flags; 2018 2019 if (len > sizeof(pp->rb_buf[0].data)) 2020 len = sizeof(pp->rb_buf[0].data); 2021 spin_lock_irqsave(&all_pvt_lock, flags); 2022 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) { 2023 pp = list_entry(list, struct pmu_private, list); 2024 spin_lock(&pp->lock); 2025 i = pp->rb_put + 1; 2026 if (i >= RB_SIZE) 2027 i = 0; 2028 if (i != pp->rb_get) { 2029 struct rb_entry *rp = &pp->rb_buf[pp->rb_put]; 2030 rp->len = len; 2031 memcpy(rp->data, data, len); 2032 pp->rb_put = i; 2033 wake_up_interruptible(&pp->wait); 2034 } 2035 spin_unlock(&pp->lock); 2036 } 2037 spin_unlock_irqrestore(&all_pvt_lock, flags); 2038 } 2039 2040 static int 2041 pmu_open(struct inode *inode, struct file *file) 2042 { 2043 struct pmu_private *pp; 2044 unsigned long flags; 2045 2046 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL); 2047 if (!pp) 2048 return -ENOMEM; 2049 pp->rb_get = pp->rb_put = 0; 2050 spin_lock_init(&pp->lock); 2051 init_waitqueue_head(&pp->wait); 2052 mutex_lock(&pmu_info_proc_mutex); 2053 spin_lock_irqsave(&all_pvt_lock, flags); 2054 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2055 pp->backlight_locker = 0; 2056 #endif 2057 list_add(&pp->list, &all_pmu_pvt); 2058 spin_unlock_irqrestore(&all_pvt_lock, flags); 2059 file->private_data = pp; 2060 mutex_unlock(&pmu_info_proc_mutex); 2061 return 0; 2062 } 2063 2064 static ssize_t 2065 pmu_read(struct file *file, char __user *buf, 2066 size_t count, loff_t *ppos) 2067 { 2068 struct pmu_private *pp = file->private_data; 2069 DECLARE_WAITQUEUE(wait, current); 2070 unsigned long flags; 2071 int ret = 0; 2072 2073 if (count < 1 || !pp) 2074 return -EINVAL; 2075 if (!access_ok(VERIFY_WRITE, buf, count)) 2076 return -EFAULT; 2077 2078 spin_lock_irqsave(&pp->lock, flags); 2079 add_wait_queue(&pp->wait, &wait); 2080 set_current_state(TASK_INTERRUPTIBLE); 2081 2082 for (;;) { 2083 ret = -EAGAIN; 2084 if (pp->rb_get != pp->rb_put) { 2085 int i = pp->rb_get; 2086 struct rb_entry *rp = &pp->rb_buf[i]; 2087 ret = rp->len; 2088 spin_unlock_irqrestore(&pp->lock, flags); 2089 if (ret > count) 2090 ret = count; 2091 if (ret > 0 && copy_to_user(buf, rp->data, ret)) 2092 ret = -EFAULT; 2093 if (++i >= RB_SIZE) 2094 i = 0; 2095 spin_lock_irqsave(&pp->lock, flags); 2096 pp->rb_get = i; 2097 } 2098 if (ret >= 0) 2099 break; 2100 if (file->f_flags & O_NONBLOCK) 2101 break; 2102 ret = -ERESTARTSYS; 2103 if (signal_pending(current)) 2104 break; 2105 spin_unlock_irqrestore(&pp->lock, flags); 2106 schedule(); 2107 spin_lock_irqsave(&pp->lock, flags); 2108 } 2109 __set_current_state(TASK_RUNNING); 2110 remove_wait_queue(&pp->wait, &wait); 2111 spin_unlock_irqrestore(&pp->lock, flags); 2112 2113 return ret; 2114 } 2115 2116 static ssize_t 2117 pmu_write(struct file *file, const char __user *buf, 2118 size_t count, loff_t *ppos) 2119 { 2120 return 0; 2121 } 2122 2123 static __poll_t 2124 pmu_fpoll(struct file *filp, poll_table *wait) 2125 { 2126 struct pmu_private *pp = filp->private_data; 2127 __poll_t mask = 0; 2128 unsigned long flags; 2129 2130 if (!pp) 2131 return 0; 2132 poll_wait(filp, &pp->wait, wait); 2133 spin_lock_irqsave(&pp->lock, flags); 2134 if (pp->rb_get != pp->rb_put) 2135 mask |= EPOLLIN; 2136 spin_unlock_irqrestore(&pp->lock, flags); 2137 return mask; 2138 } 2139 2140 static int 2141 pmu_release(struct inode *inode, struct file *file) 2142 { 2143 struct pmu_private *pp = file->private_data; 2144 unsigned long flags; 2145 2146 if (pp) { 2147 file->private_data = NULL; 2148 spin_lock_irqsave(&all_pvt_lock, flags); 2149 list_del(&pp->list); 2150 spin_unlock_irqrestore(&all_pvt_lock, flags); 2151 2152 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2153 if (pp->backlight_locker) 2154 pmac_backlight_enable(); 2155 #endif 2156 2157 kfree(pp); 2158 } 2159 return 0; 2160 } 2161 2162 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 2163 static void pmac_suspend_disable_irqs(void) 2164 { 2165 /* Call platform functions marked "on sleep" */ 2166 pmac_pfunc_i2c_suspend(); 2167 pmac_pfunc_base_suspend(); 2168 } 2169 2170 static int powerbook_sleep(suspend_state_t state) 2171 { 2172 int error = 0; 2173 2174 /* Wait for completion of async requests */ 2175 while (!batt_req.complete) 2176 pmu_poll(); 2177 2178 /* Giveup the lazy FPU & vec so we don't have to back them 2179 * up from the low level code 2180 */ 2181 enable_kernel_fp(); 2182 2183 #ifdef CONFIG_ALTIVEC 2184 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 2185 enable_kernel_altivec(); 2186 #endif /* CONFIG_ALTIVEC */ 2187 2188 switch (pmu_kind) { 2189 case PMU_OHARE_BASED: 2190 error = powerbook_sleep_3400(); 2191 break; 2192 case PMU_HEATHROW_BASED: 2193 case PMU_PADDINGTON_BASED: 2194 error = powerbook_sleep_grackle(); 2195 break; 2196 case PMU_KEYLARGO_BASED: 2197 error = powerbook_sleep_Core99(); 2198 break; 2199 default: 2200 return -ENOSYS; 2201 } 2202 2203 if (error) 2204 return error; 2205 2206 mdelay(100); 2207 2208 return 0; 2209 } 2210 2211 static void pmac_suspend_enable_irqs(void) 2212 { 2213 /* Force a poll of ADB interrupts */ 2214 adb_int_pending = 1; 2215 via_pmu_interrupt(0, NULL); 2216 2217 mdelay(10); 2218 2219 /* Call platform functions marked "on wake" */ 2220 pmac_pfunc_base_resume(); 2221 pmac_pfunc_i2c_resume(); 2222 } 2223 2224 static int pmu_sleep_valid(suspend_state_t state) 2225 { 2226 return state == PM_SUSPEND_MEM 2227 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0); 2228 } 2229 2230 static const struct platform_suspend_ops pmu_pm_ops = { 2231 .enter = powerbook_sleep, 2232 .valid = pmu_sleep_valid, 2233 }; 2234 2235 static int register_pmu_pm_ops(void) 2236 { 2237 if (pmu_kind == PMU_OHARE_BASED) 2238 powerbook_sleep_init_3400(); 2239 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs; 2240 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs; 2241 suspend_set_ops(&pmu_pm_ops); 2242 2243 return 0; 2244 } 2245 2246 device_initcall(register_pmu_pm_ops); 2247 #endif 2248 2249 static int pmu_ioctl(struct file *filp, 2250 u_int cmd, u_long arg) 2251 { 2252 __u32 __user *argp = (__u32 __user *)arg; 2253 int error = -EINVAL; 2254 2255 switch (cmd) { 2256 case PMU_IOC_SLEEP: 2257 if (!capable(CAP_SYS_ADMIN)) 2258 return -EACCES; 2259 return pm_suspend(PM_SUSPEND_MEM); 2260 case PMU_IOC_CAN_SLEEP: 2261 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0) 2262 return put_user(0, argp); 2263 else 2264 return put_user(1, argp); 2265 2266 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY 2267 /* Compatibility ioctl's for backlight */ 2268 case PMU_IOC_GET_BACKLIGHT: 2269 { 2270 int brightness; 2271 2272 brightness = pmac_backlight_get_legacy_brightness(); 2273 if (brightness < 0) 2274 return brightness; 2275 else 2276 return put_user(brightness, argp); 2277 2278 } 2279 case PMU_IOC_SET_BACKLIGHT: 2280 { 2281 int brightness; 2282 2283 error = get_user(brightness, argp); 2284 if (error) 2285 return error; 2286 2287 return pmac_backlight_set_legacy_brightness(brightness); 2288 } 2289 #ifdef CONFIG_INPUT_ADBHID 2290 case PMU_IOC_GRAB_BACKLIGHT: { 2291 struct pmu_private *pp = filp->private_data; 2292 2293 if (pp->backlight_locker) 2294 return 0; 2295 2296 pp->backlight_locker = 1; 2297 pmac_backlight_disable(); 2298 2299 return 0; 2300 } 2301 #endif /* CONFIG_INPUT_ADBHID */ 2302 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */ 2303 2304 case PMU_IOC_GET_MODEL: 2305 return put_user(pmu_kind, argp); 2306 case PMU_IOC_HAS_ADB: 2307 return put_user(pmu_has_adb, argp); 2308 } 2309 return error; 2310 } 2311 2312 static long pmu_unlocked_ioctl(struct file *filp, 2313 u_int cmd, u_long arg) 2314 { 2315 int ret; 2316 2317 mutex_lock(&pmu_info_proc_mutex); 2318 ret = pmu_ioctl(filp, cmd, arg); 2319 mutex_unlock(&pmu_info_proc_mutex); 2320 2321 return ret; 2322 } 2323 2324 #ifdef CONFIG_COMPAT 2325 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t) 2326 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t) 2327 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t) 2328 #define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t) 2329 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t) 2330 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t) 2331 2332 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg) 2333 { 2334 switch (cmd) { 2335 case PMU_IOC_SLEEP: 2336 break; 2337 case PMU_IOC_GET_BACKLIGHT32: 2338 cmd = PMU_IOC_GET_BACKLIGHT; 2339 break; 2340 case PMU_IOC_SET_BACKLIGHT32: 2341 cmd = PMU_IOC_SET_BACKLIGHT; 2342 break; 2343 case PMU_IOC_GET_MODEL32: 2344 cmd = PMU_IOC_GET_MODEL; 2345 break; 2346 case PMU_IOC_HAS_ADB32: 2347 cmd = PMU_IOC_HAS_ADB; 2348 break; 2349 case PMU_IOC_CAN_SLEEP32: 2350 cmd = PMU_IOC_CAN_SLEEP; 2351 break; 2352 case PMU_IOC_GRAB_BACKLIGHT32: 2353 cmd = PMU_IOC_GRAB_BACKLIGHT; 2354 break; 2355 default: 2356 return -ENOIOCTLCMD; 2357 } 2358 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); 2359 } 2360 #endif 2361 2362 static const struct file_operations pmu_device_fops = { 2363 .read = pmu_read, 2364 .write = pmu_write, 2365 .poll = pmu_fpoll, 2366 .unlocked_ioctl = pmu_unlocked_ioctl, 2367 #ifdef CONFIG_COMPAT 2368 .compat_ioctl = compat_pmu_ioctl, 2369 #endif 2370 .open = pmu_open, 2371 .release = pmu_release, 2372 .llseek = noop_llseek, 2373 }; 2374 2375 static struct miscdevice pmu_device = { 2376 PMU_MINOR, "pmu", &pmu_device_fops 2377 }; 2378 2379 static int pmu_device_init(void) 2380 { 2381 if (!via) 2382 return 0; 2383 if (misc_register(&pmu_device) < 0) 2384 printk(KERN_ERR "via-pmu: cannot register misc device.\n"); 2385 return 0; 2386 } 2387 device_initcall(pmu_device_init); 2388 2389 2390 #ifdef DEBUG_SLEEP 2391 static inline void 2392 polled_handshake(volatile unsigned char __iomem *via) 2393 { 2394 via[B] &= ~TREQ; eieio(); 2395 while ((via[B] & TACK) != 0) 2396 ; 2397 via[B] |= TREQ; eieio(); 2398 while ((via[B] & TACK) == 0) 2399 ; 2400 } 2401 2402 static inline void 2403 polled_send_byte(volatile unsigned char __iomem *via, int x) 2404 { 2405 via[ACR] |= SR_OUT | SR_EXT; eieio(); 2406 via[SR] = x; eieio(); 2407 polled_handshake(via); 2408 } 2409 2410 static inline int 2411 polled_recv_byte(volatile unsigned char __iomem *via) 2412 { 2413 int x; 2414 2415 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio(); 2416 x = via[SR]; eieio(); 2417 polled_handshake(via); 2418 x = via[SR]; eieio(); 2419 return x; 2420 } 2421 2422 int 2423 pmu_polled_request(struct adb_request *req) 2424 { 2425 unsigned long flags; 2426 int i, l, c; 2427 volatile unsigned char __iomem *v = via; 2428 2429 req->complete = 1; 2430 c = req->data[0]; 2431 l = pmu_data_len[c][0]; 2432 if (l >= 0 && req->nbytes != l + 1) 2433 return -EINVAL; 2434 2435 local_irq_save(flags); 2436 while (pmu_state != idle) 2437 pmu_poll(); 2438 2439 while ((via[B] & TACK) == 0) 2440 ; 2441 polled_send_byte(v, c); 2442 if (l < 0) { 2443 l = req->nbytes - 1; 2444 polled_send_byte(v, l); 2445 } 2446 for (i = 1; i <= l; ++i) 2447 polled_send_byte(v, req->data[i]); 2448 2449 l = pmu_data_len[c][1]; 2450 if (l < 0) 2451 l = polled_recv_byte(v); 2452 for (i = 0; i < l; ++i) 2453 req->reply[i + req->reply_len] = polled_recv_byte(v); 2454 2455 if (req->done) 2456 (*req->done)(req); 2457 2458 local_irq_restore(flags); 2459 return 0; 2460 } 2461 2462 /* N.B. This doesn't work on the 3400 */ 2463 void pmu_blink(int n) 2464 { 2465 struct adb_request req; 2466 2467 memset(&req, 0, sizeof(req)); 2468 2469 for (; n > 0; --n) { 2470 req.nbytes = 4; 2471 req.done = NULL; 2472 req.data[0] = 0xee; 2473 req.data[1] = 4; 2474 req.data[2] = 0; 2475 req.data[3] = 1; 2476 req.reply[0] = ADB_RET_OK; 2477 req.reply_len = 1; 2478 req.reply_expected = 0; 2479 pmu_polled_request(&req); 2480 mdelay(50); 2481 req.nbytes = 4; 2482 req.done = NULL; 2483 req.data[0] = 0xee; 2484 req.data[1] = 4; 2485 req.data[2] = 0; 2486 req.data[3] = 0; 2487 req.reply[0] = ADB_RET_OK; 2488 req.reply_len = 1; 2489 req.reply_expected = 0; 2490 pmu_polled_request(&req); 2491 mdelay(50); 2492 } 2493 mdelay(50); 2494 } 2495 #endif /* DEBUG_SLEEP */ 2496 2497 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) 2498 int pmu_sys_suspended; 2499 2500 static int pmu_syscore_suspend(void) 2501 { 2502 /* Suspend PMU event interrupts */ 2503 pmu_suspend(); 2504 pmu_sys_suspended = 1; 2505 2506 #ifdef CONFIG_PMAC_BACKLIGHT 2507 /* Tell backlight code not to muck around with the chip anymore */ 2508 pmu_backlight_set_sleep(1); 2509 #endif 2510 2511 return 0; 2512 } 2513 2514 static void pmu_syscore_resume(void) 2515 { 2516 struct adb_request req; 2517 2518 if (!pmu_sys_suspended) 2519 return; 2520 2521 /* Tell PMU we are ready */ 2522 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2523 pmu_wait_complete(&req); 2524 2525 #ifdef CONFIG_PMAC_BACKLIGHT 2526 /* Tell backlight code it can use the chip again */ 2527 pmu_backlight_set_sleep(0); 2528 #endif 2529 /* Resume PMU event interrupts */ 2530 pmu_resume(); 2531 pmu_sys_suspended = 0; 2532 } 2533 2534 static struct syscore_ops pmu_syscore_ops = { 2535 .suspend = pmu_syscore_suspend, 2536 .resume = pmu_syscore_resume, 2537 }; 2538 2539 static int pmu_syscore_register(void) 2540 { 2541 register_syscore_ops(&pmu_syscore_ops); 2542 2543 return 0; 2544 } 2545 subsys_initcall(pmu_syscore_register); 2546 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2547 2548 EXPORT_SYMBOL(pmu_request); 2549 EXPORT_SYMBOL(pmu_queue_request); 2550 EXPORT_SYMBOL(pmu_poll); 2551 EXPORT_SYMBOL(pmu_poll_adb); 2552 EXPORT_SYMBOL(pmu_wait_complete); 2553 EXPORT_SYMBOL(pmu_suspend); 2554 EXPORT_SYMBOL(pmu_resume); 2555 EXPORT_SYMBOL(pmu_unlock); 2556 #if defined(CONFIG_PPC32) 2557 EXPORT_SYMBOL(pmu_enable_irled); 2558 EXPORT_SYMBOL(pmu_battery_count); 2559 EXPORT_SYMBOL(pmu_batteries); 2560 EXPORT_SYMBOL(pmu_power_flags); 2561 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ 2562 2563