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