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