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 * 14 * THIS DRIVER IS BECOMING A TOTAL MESS ! 15 * - Cleanup atomically disabling reply to PMU events after 16 * a sleep or a freq. switch 17 * - Move sleep code out of here to pmac_pm, merge into new 18 * common PM infrastructure 19 * - Move backlight code out as well 20 * - Save/Restore PCI space properly 21 * 22 */ 23 #include <stdarg.h> 24 #include <linux/config.h> 25 #include <linux/types.h> 26 #include <linux/errno.h> 27 #include <linux/kernel.h> 28 #include <linux/delay.h> 29 #include <linux/sched.h> 30 #include <linux/miscdevice.h> 31 #include <linux/blkdev.h> 32 #include <linux/pci.h> 33 #include <linux/slab.h> 34 #include <linux/poll.h> 35 #include <linux/adb.h> 36 #include <linux/pmu.h> 37 #include <linux/cuda.h> 38 #include <linux/smp_lock.h> 39 #include <linux/module.h> 40 #include <linux/spinlock.h> 41 #include <linux/pm.h> 42 #include <linux/proc_fs.h> 43 #include <linux/init.h> 44 #include <linux/interrupt.h> 45 #include <linux/device.h> 46 #include <linux/sysdev.h> 47 #include <linux/suspend.h> 48 #include <linux/syscalls.h> 49 #include <linux/cpu.h> 50 #include <asm/prom.h> 51 #include <asm/machdep.h> 52 #include <asm/io.h> 53 #include <asm/pgtable.h> 54 #include <asm/system.h> 55 #include <asm/sections.h> 56 #include <asm/irq.h> 57 #include <asm/pmac_feature.h> 58 #include <asm/uaccess.h> 59 #include <asm/mmu_context.h> 60 #include <asm/cputable.h> 61 #include <asm/time.h> 62 #ifdef CONFIG_PMAC_BACKLIGHT 63 #include <asm/backlight.h> 64 #endif 65 66 #ifdef CONFIG_PPC32 67 #include <asm/open_pic.h> 68 #endif 69 70 /* Some compile options */ 71 #undef SUSPEND_USES_PMU 72 #define DEBUG_SLEEP 73 #undef HACKED_PCI_SAVE 74 75 /* Misc minor number allocated for /dev/pmu */ 76 #define PMU_MINOR 154 77 78 /* How many iterations between battery polls */ 79 #define BATTERY_POLLING_COUNT 2 80 81 static volatile unsigned char __iomem *via; 82 83 /* VIA registers - spaced 0x200 bytes apart */ 84 #define RS 0x200 /* skip between registers */ 85 #define B 0 /* B-side data */ 86 #define A RS /* A-side data */ 87 #define DIRB (2*RS) /* B-side direction (1=output) */ 88 #define DIRA (3*RS) /* A-side direction (1=output) */ 89 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */ 90 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */ 91 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */ 92 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */ 93 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */ 94 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */ 95 #define SR (10*RS) /* Shift register */ 96 #define ACR (11*RS) /* Auxiliary control register */ 97 #define PCR (12*RS) /* Peripheral control register */ 98 #define IFR (13*RS) /* Interrupt flag register */ 99 #define IER (14*RS) /* Interrupt enable register */ 100 #define ANH (15*RS) /* A-side data, no handshake */ 101 102 /* Bits in B data register: both active low */ 103 #define TACK 0x08 /* Transfer acknowledge (input) */ 104 #define TREQ 0x10 /* Transfer request (output) */ 105 106 /* Bits in ACR */ 107 #define SR_CTRL 0x1c /* Shift register control bits */ 108 #define SR_EXT 0x0c /* Shift on external clock */ 109 #define SR_OUT 0x10 /* Shift out if 1 */ 110 111 /* Bits in IFR and IER */ 112 #define IER_SET 0x80 /* set bits in IER */ 113 #define IER_CLR 0 /* clear bits in IER */ 114 #define SR_INT 0x04 /* Shift register full/empty */ 115 #define CB2_INT 0x08 116 #define CB1_INT 0x10 /* transition on CB1 input */ 117 118 static volatile enum pmu_state { 119 idle, 120 sending, 121 intack, 122 reading, 123 reading_intr, 124 locked, 125 } pmu_state; 126 127 static volatile enum int_data_state { 128 int_data_empty, 129 int_data_fill, 130 int_data_ready, 131 int_data_flush 132 } int_data_state[2] = { int_data_empty, int_data_empty }; 133 134 static struct adb_request *current_req; 135 static struct adb_request *last_req; 136 static struct adb_request *req_awaiting_reply; 137 static unsigned char interrupt_data[2][32]; 138 static int interrupt_data_len[2]; 139 static int int_data_last; 140 static unsigned char *reply_ptr; 141 static int data_index; 142 static int data_len; 143 static volatile int adb_int_pending; 144 static volatile int disable_poll; 145 static struct adb_request bright_req_1, bright_req_2; 146 static struct device_node *vias; 147 static int pmu_kind = PMU_UNKNOWN; 148 static int pmu_fully_inited = 0; 149 static int pmu_has_adb; 150 static struct device_node *gpio_node; 151 static unsigned char __iomem *gpio_reg = NULL; 152 static int gpio_irq = -1; 153 static int gpio_irq_enabled = -1; 154 static volatile int pmu_suspended = 0; 155 static spinlock_t pmu_lock; 156 static u8 pmu_intr_mask; 157 static int pmu_version; 158 static int drop_interrupts; 159 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 160 static int option_lid_wakeup = 1; 161 static int sleep_in_progress; 162 #endif /* CONFIG_PM && CONFIG_PPC32 */ 163 static unsigned long async_req_locks; 164 static unsigned int pmu_irq_stats[11]; 165 166 static struct proc_dir_entry *proc_pmu_root; 167 static struct proc_dir_entry *proc_pmu_info; 168 static struct proc_dir_entry *proc_pmu_irqstats; 169 static struct proc_dir_entry *proc_pmu_options; 170 static int option_server_mode; 171 172 int pmu_battery_count; 173 int pmu_cur_battery; 174 unsigned int pmu_power_flags; 175 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES]; 176 static int query_batt_timer = BATTERY_POLLING_COUNT; 177 static struct adb_request batt_req; 178 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES]; 179 180 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 181 extern int disable_kernel_backlight; 182 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 183 184 int __fake_sleep; 185 int asleep; 186 struct notifier_block *sleep_notifier_list; 187 188 #ifdef CONFIG_ADB 189 static int adb_dev_map = 0; 190 static int pmu_adb_flags; 191 192 static int pmu_probe(void); 193 static int pmu_init(void); 194 static int pmu_send_request(struct adb_request *req, int sync); 195 static int pmu_adb_autopoll(int devs); 196 static int pmu_adb_reset_bus(void); 197 #endif /* CONFIG_ADB */ 198 199 static int init_pmu(void); 200 static int pmu_queue_request(struct adb_request *req); 201 static void pmu_start(void); 202 static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs); 203 static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs); 204 static int proc_get_info(char *page, char **start, off_t off, 205 int count, int *eof, void *data); 206 static int proc_get_irqstats(char *page, char **start, off_t off, 207 int count, int *eof, void *data); 208 #ifdef CONFIG_PMAC_BACKLIGHT 209 static int pmu_set_backlight_level(int level, void* data); 210 static int pmu_set_backlight_enable(int on, int level, void* data); 211 #endif /* CONFIG_PMAC_BACKLIGHT */ 212 static void pmu_pass_intr(unsigned char *data, int len); 213 static int proc_get_batt(char *page, char **start, off_t off, 214 int count, int *eof, void *data); 215 static int proc_read_options(char *page, char **start, off_t off, 216 int count, int *eof, void *data); 217 static int proc_write_options(struct file *file, const char __user *buffer, 218 unsigned long count, void *data); 219 220 #ifdef CONFIG_ADB 221 struct adb_driver via_pmu_driver = { 222 "PMU", 223 pmu_probe, 224 pmu_init, 225 pmu_send_request, 226 pmu_adb_autopoll, 227 pmu_poll_adb, 228 pmu_adb_reset_bus 229 }; 230 #endif /* CONFIG_ADB */ 231 232 extern void low_sleep_handler(void); 233 extern void enable_kernel_altivec(void); 234 extern void enable_kernel_fp(void); 235 236 #ifdef DEBUG_SLEEP 237 int pmu_polled_request(struct adb_request *req); 238 int pmu_wink(struct adb_request *req); 239 #endif 240 241 /* 242 * This table indicates for each PMU opcode: 243 * - the number of data bytes to be sent with the command, or -1 244 * if a length byte should be sent, 245 * - the number of response bytes which the PMU will return, or 246 * -1 if it will send a length byte. 247 */ 248 static const s8 pmu_data_len[256][2] = { 249 /* 0 1 2 3 4 5 6 7 */ 250 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 251 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 252 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 253 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0}, 254 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0}, 255 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1}, 256 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 257 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0}, 258 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 259 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1}, 260 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0}, 261 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1}, 262 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 263 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1}, 264 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 265 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1}, 266 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 267 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 268 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 269 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 270 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0}, 271 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 272 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 273 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 274 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 275 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 276 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 277 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1}, 278 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0}, 279 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0}, 280 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 281 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 282 }; 283 284 static char *pbook_type[] = { 285 "Unknown PowerBook", 286 "PowerBook 2400/3400/3500(G3)", 287 "PowerBook G3 Series", 288 "1999 PowerBook G3", 289 "Core99" 290 }; 291 292 #ifdef CONFIG_PMAC_BACKLIGHT 293 static struct backlight_controller pmu_backlight_controller = { 294 pmu_set_backlight_enable, 295 pmu_set_backlight_level 296 }; 297 #endif /* CONFIG_PMAC_BACKLIGHT */ 298 299 int __init find_via_pmu(void) 300 { 301 phys_addr_t taddr; 302 u32 *reg; 303 304 if (via != 0) 305 return 1; 306 vias = of_find_node_by_name(NULL, "via-pmu"); 307 if (vias == NULL) 308 return 0; 309 310 reg = (u32 *)get_property(vias, "reg", NULL); 311 if (reg == NULL) { 312 printk(KERN_ERR "via-pmu: No \"reg\" property !\n"); 313 goto fail; 314 } 315 taddr = of_translate_address(vias, reg); 316 if (taddr == 0) { 317 printk(KERN_ERR "via-pmu: Can't translate address !\n"); 318 goto fail; 319 } 320 321 spin_lock_init(&pmu_lock); 322 323 pmu_has_adb = 1; 324 325 pmu_intr_mask = PMU_INT_PCEJECT | 326 PMU_INT_SNDBRT | 327 PMU_INT_ADB | 328 PMU_INT_TICK; 329 330 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0) 331 || device_is_compatible(vias->parent, "ohare"))) 332 pmu_kind = PMU_OHARE_BASED; 333 else if (device_is_compatible(vias->parent, "paddington")) 334 pmu_kind = PMU_PADDINGTON_BASED; 335 else if (device_is_compatible(vias->parent, "heathrow")) 336 pmu_kind = PMU_HEATHROW_BASED; 337 else if (device_is_compatible(vias->parent, "Keylargo") 338 || device_is_compatible(vias->parent, "K2-Keylargo")) { 339 struct device_node *gpiop; 340 phys_addr_t gaddr = 0; 341 342 pmu_kind = PMU_KEYLARGO_BASED; 343 pmu_has_adb = (find_type_devices("adb") != NULL); 344 pmu_intr_mask = PMU_INT_PCEJECT | 345 PMU_INT_SNDBRT | 346 PMU_INT_ADB | 347 PMU_INT_TICK | 348 PMU_INT_ENVIRONMENT; 349 350 gpiop = of_find_node_by_name(NULL, "gpio"); 351 if (gpiop) { 352 reg = (u32 *)get_property(gpiop, "reg", NULL); 353 if (reg) 354 gaddr = of_translate_address(gpiop, reg); 355 if (gaddr != 0) 356 gpio_reg = ioremap(gaddr, 0x10); 357 } 358 if (gpio_reg == NULL) 359 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n"); 360 } else 361 pmu_kind = PMU_UNKNOWN; 362 363 via = ioremap(taddr, 0x2000); 364 if (via == NULL) { 365 printk(KERN_ERR "via-pmu: Can't map address !\n"); 366 goto fail; 367 } 368 369 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 370 out_8(&via[IFR], 0x7f); /* clear IFR */ 371 372 pmu_state = idle; 373 374 if (!init_pmu()) { 375 via = NULL; 376 return 0; 377 } 378 379 printk(KERN_INFO "PMU driver %d initialized for %s, firmware: %02x\n", 380 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version); 381 382 sys_ctrler = SYS_CTRLER_PMU; 383 384 return 1; 385 fail: 386 of_node_put(vias); 387 vias = NULL; 388 return 0; 389 } 390 391 #ifdef CONFIG_ADB 392 static int pmu_probe(void) 393 { 394 return vias == NULL? -ENODEV: 0; 395 } 396 397 static int __init pmu_init(void) 398 { 399 if (vias == NULL) 400 return -ENODEV; 401 return 0; 402 } 403 #endif /* CONFIG_ADB */ 404 405 /* 406 * We can't wait until pmu_init gets called, that happens too late. 407 * It happens after IDE and SCSI initialization, which can take a few 408 * seconds, and by that time the PMU could have given up on us and 409 * turned us off. 410 * Thus this is called with arch_initcall rather than device_initcall. 411 */ 412 static int __init via_pmu_start(void) 413 { 414 if (vias == NULL) 415 return -ENODEV; 416 417 bright_req_1.complete = 1; 418 bright_req_2.complete = 1; 419 batt_req.complete = 1; 420 421 #ifndef CONFIG_PPC_MERGE 422 if (pmu_kind == PMU_KEYLARGO_BASED) 423 openpic_set_irq_priority(vias->intrs[0].line, 424 OPENPIC_PRIORITY_DEFAULT + 1); 425 #endif 426 427 if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU", 428 (void *)0)) { 429 printk(KERN_ERR "VIA-PMU: can't get irq %d\n", 430 vias->intrs[0].line); 431 return -EAGAIN; 432 } 433 434 if (pmu_kind == PMU_KEYLARGO_BASED) { 435 gpio_node = of_find_node_by_name(NULL, "extint-gpio1"); 436 if (gpio_node == NULL) 437 gpio_node = of_find_node_by_name(NULL, 438 "pmu-interrupt"); 439 if (gpio_node && gpio_node->n_intrs > 0) 440 gpio_irq = gpio_node->intrs[0].line; 441 442 if (gpio_irq != -1) { 443 if (request_irq(gpio_irq, gpio1_interrupt, 0, 444 "GPIO1 ADB", (void *)0)) 445 printk(KERN_ERR "pmu: can't get irq %d" 446 " (GPIO1)\n", gpio_irq); 447 else 448 gpio_irq_enabled = 1; 449 } 450 } 451 452 /* Enable interrupts */ 453 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 454 455 pmu_fully_inited = 1; 456 457 /* Make sure PMU settle down before continuing. This is _very_ important 458 * since the IDE probe may shut interrupts down for quite a bit of time. If 459 * a PMU communication is pending while this happens, the PMU may timeout 460 * Not that on Core99 machines, the PMU keeps sending us environement 461 * messages, we should find a way to either fix IDE or make it call 462 * pmu_suspend() before masking interrupts. This can also happens while 463 * scolling with some fbdevs. 464 */ 465 do { 466 pmu_poll(); 467 } while (pmu_state != idle); 468 469 return 0; 470 } 471 472 arch_initcall(via_pmu_start); 473 474 /* 475 * This has to be done after pci_init, which is a subsys_initcall. 476 */ 477 static int __init via_pmu_dev_init(void) 478 { 479 if (vias == NULL) 480 return -ENODEV; 481 482 #ifndef CONFIG_PPC64 483 request_OF_resource(vias, 0, NULL); 484 #endif 485 #ifdef CONFIG_PMAC_BACKLIGHT 486 /* Enable backlight */ 487 register_backlight_controller(&pmu_backlight_controller, NULL, "pmu"); 488 #endif /* CONFIG_PMAC_BACKLIGHT */ 489 490 #ifdef CONFIG_PPC32 491 if (machine_is_compatible("AAPL,3400/2400") || 492 machine_is_compatible("AAPL,3500")) { 493 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 494 NULL, PMAC_MB_INFO_MODEL, 0); 495 pmu_battery_count = 1; 496 if (mb == PMAC_TYPE_COMET) 497 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET; 498 else 499 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER; 500 } else if (machine_is_compatible("AAPL,PowerBook1998") || 501 machine_is_compatible("PowerBook1,1")) { 502 pmu_battery_count = 2; 503 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 504 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 505 } else { 506 struct device_node* prim = find_devices("power-mgt"); 507 u32 *prim_info = NULL; 508 if (prim) 509 prim_info = (u32 *)get_property(prim, "prim-info", NULL); 510 if (prim_info) { 511 /* Other stuffs here yet unknown */ 512 pmu_battery_count = (prim_info[6] >> 16) & 0xff; 513 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 514 if (pmu_battery_count > 1) 515 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 516 } 517 } 518 #endif /* CONFIG_PPC32 */ 519 520 /* Create /proc/pmu */ 521 proc_pmu_root = proc_mkdir("pmu", NULL); 522 if (proc_pmu_root) { 523 long i; 524 525 for (i=0; i<pmu_battery_count; i++) { 526 char title[16]; 527 sprintf(title, "battery_%ld", i); 528 proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root, 529 proc_get_batt, (void *)i); 530 } 531 532 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root, 533 proc_get_info, NULL); 534 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root, 535 proc_get_irqstats, NULL); 536 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root); 537 if (proc_pmu_options) { 538 proc_pmu_options->nlink = 1; 539 proc_pmu_options->read_proc = proc_read_options; 540 proc_pmu_options->write_proc = proc_write_options; 541 } 542 } 543 return 0; 544 } 545 546 device_initcall(via_pmu_dev_init); 547 548 static int 549 init_pmu(void) 550 { 551 int timeout; 552 struct adb_request req; 553 554 out_8(&via[B], via[B] | TREQ); /* negate TREQ */ 555 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */ 556 557 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 558 timeout = 100000; 559 while (!req.complete) { 560 if (--timeout < 0) { 561 printk(KERN_ERR "init_pmu: no response from PMU\n"); 562 return 0; 563 } 564 udelay(10); 565 pmu_poll(); 566 } 567 568 /* ack all pending interrupts */ 569 timeout = 100000; 570 interrupt_data[0][0] = 1; 571 while (interrupt_data[0][0] || pmu_state != idle) { 572 if (--timeout < 0) { 573 printk(KERN_ERR "init_pmu: timed out acking intrs\n"); 574 return 0; 575 } 576 if (pmu_state == idle) 577 adb_int_pending = 1; 578 via_pmu_interrupt(0, NULL, NULL); 579 udelay(10); 580 } 581 582 /* Tell PMU we are ready. */ 583 if (pmu_kind == PMU_KEYLARGO_BASED) { 584 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 585 while (!req.complete) 586 pmu_poll(); 587 } 588 589 /* Read PMU version */ 590 pmu_request(&req, NULL, 1, PMU_GET_VERSION); 591 pmu_wait_complete(&req); 592 if (req.reply_len > 0) 593 pmu_version = req.reply[0]; 594 595 /* Read server mode setting */ 596 if (pmu_kind == PMU_KEYLARGO_BASED) { 597 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, 598 PMU_PWR_GET_POWERUP_EVENTS); 599 pmu_wait_complete(&req); 600 if (req.reply_len == 2) { 601 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT) 602 option_server_mode = 1; 603 printk(KERN_INFO "via-pmu: Server Mode is %s\n", 604 option_server_mode ? "enabled" : "disabled"); 605 } 606 } 607 return 1; 608 } 609 610 int 611 pmu_get_model(void) 612 { 613 return pmu_kind; 614 } 615 616 static void pmu_set_server_mode(int server_mode) 617 { 618 struct adb_request req; 619 620 if (pmu_kind != PMU_KEYLARGO_BASED) 621 return; 622 623 option_server_mode = server_mode; 624 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS); 625 pmu_wait_complete(&req); 626 if (req.reply_len < 2) 627 return; 628 if (server_mode) 629 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 630 PMU_PWR_SET_POWERUP_EVENTS, 631 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 632 else 633 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 634 PMU_PWR_CLR_POWERUP_EVENTS, 635 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 636 pmu_wait_complete(&req); 637 } 638 639 /* This new version of the code for 2400/3400/3500 powerbooks 640 * is inspired from the implementation in gkrellm-pmu 641 */ 642 static void 643 done_battery_state_ohare(struct adb_request* req) 644 { 645 /* format: 646 * [0] : flags 647 * 0x01 : AC indicator 648 * 0x02 : charging 649 * 0x04 : battery exist 650 * 0x08 : 651 * 0x10 : 652 * 0x20 : full charged 653 * 0x40 : pcharge reset 654 * 0x80 : battery exist 655 * 656 * [1][2] : battery voltage 657 * [3] : CPU temperature 658 * [4] : battery temperature 659 * [5] : current 660 * [6][7] : pcharge 661 * --tkoba 662 */ 663 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER; 664 long pcharge, charge, vb, vmax, lmax; 665 long vmax_charging, vmax_charged; 666 long amperage, voltage, time, max; 667 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 668 NULL, PMAC_MB_INFO_MODEL, 0); 669 670 if (req->reply[0] & 0x01) 671 pmu_power_flags |= PMU_PWR_AC_PRESENT; 672 else 673 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 674 675 if (mb == PMAC_TYPE_COMET) { 676 vmax_charged = 189; 677 vmax_charging = 213; 678 lmax = 6500; 679 } else { 680 vmax_charged = 330; 681 vmax_charging = 330; 682 lmax = 6500; 683 } 684 vmax = vmax_charged; 685 686 /* If battery installed */ 687 if (req->reply[0] & 0x04) { 688 bat_flags |= PMU_BATT_PRESENT; 689 if (req->reply[0] & 0x02) 690 bat_flags |= PMU_BATT_CHARGING; 691 vb = (req->reply[1] << 8) | req->reply[2]; 692 voltage = (vb * 265 + 72665) / 10; 693 amperage = req->reply[5]; 694 if ((req->reply[0] & 0x01) == 0) { 695 if (amperage > 200) 696 vb += ((amperage - 200) * 15)/100; 697 } else if (req->reply[0] & 0x02) { 698 vb = (vb * 97) / 100; 699 vmax = vmax_charging; 700 } 701 charge = (100 * vb) / vmax; 702 if (req->reply[0] & 0x40) { 703 pcharge = (req->reply[6] << 8) + req->reply[7]; 704 if (pcharge > lmax) 705 pcharge = lmax; 706 pcharge *= 100; 707 pcharge = 100 - pcharge / lmax; 708 if (pcharge < charge) 709 charge = pcharge; 710 } 711 if (amperage > 0) 712 time = (charge * 16440) / amperage; 713 else 714 time = 0; 715 max = 100; 716 amperage = -amperage; 717 } else 718 charge = max = amperage = voltage = time = 0; 719 720 pmu_batteries[pmu_cur_battery].flags = bat_flags; 721 pmu_batteries[pmu_cur_battery].charge = charge; 722 pmu_batteries[pmu_cur_battery].max_charge = max; 723 pmu_batteries[pmu_cur_battery].amperage = amperage; 724 pmu_batteries[pmu_cur_battery].voltage = voltage; 725 pmu_batteries[pmu_cur_battery].time_remaining = time; 726 727 clear_bit(0, &async_req_locks); 728 } 729 730 static void 731 done_battery_state_smart(struct adb_request* req) 732 { 733 /* format: 734 * [0] : format of this structure (known: 3,4,5) 735 * [1] : flags 736 * 737 * format 3 & 4: 738 * 739 * [2] : charge 740 * [3] : max charge 741 * [4] : current 742 * [5] : voltage 743 * 744 * format 5: 745 * 746 * [2][3] : charge 747 * [4][5] : max charge 748 * [6][7] : current 749 * [8][9] : voltage 750 */ 751 752 unsigned int bat_flags = PMU_BATT_TYPE_SMART; 753 int amperage; 754 unsigned int capa, max, voltage; 755 756 if (req->reply[1] & 0x01) 757 pmu_power_flags |= PMU_PWR_AC_PRESENT; 758 else 759 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 760 761 762 capa = max = amperage = voltage = 0; 763 764 if (req->reply[1] & 0x04) { 765 bat_flags |= PMU_BATT_PRESENT; 766 switch(req->reply[0]) { 767 case 3: 768 case 4: capa = req->reply[2]; 769 max = req->reply[3]; 770 amperage = *((signed char *)&req->reply[4]); 771 voltage = req->reply[5]; 772 break; 773 case 5: capa = (req->reply[2] << 8) | req->reply[3]; 774 max = (req->reply[4] << 8) | req->reply[5]; 775 amperage = *((signed short *)&req->reply[6]); 776 voltage = (req->reply[8] << 8) | req->reply[9]; 777 break; 778 default: 779 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n", 780 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]); 781 break; 782 } 783 } 784 785 if ((req->reply[1] & 0x01) && (amperage > 0)) 786 bat_flags |= PMU_BATT_CHARGING; 787 788 pmu_batteries[pmu_cur_battery].flags = bat_flags; 789 pmu_batteries[pmu_cur_battery].charge = capa; 790 pmu_batteries[pmu_cur_battery].max_charge = max; 791 pmu_batteries[pmu_cur_battery].amperage = amperage; 792 pmu_batteries[pmu_cur_battery].voltage = voltage; 793 if (amperage) { 794 if ((req->reply[1] & 0x01) && (amperage > 0)) 795 pmu_batteries[pmu_cur_battery].time_remaining 796 = ((max-capa) * 3600) / amperage; 797 else 798 pmu_batteries[pmu_cur_battery].time_remaining 799 = (capa * 3600) / (-amperage); 800 } else 801 pmu_batteries[pmu_cur_battery].time_remaining = 0; 802 803 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count; 804 805 clear_bit(0, &async_req_locks); 806 } 807 808 static void 809 query_battery_state(void) 810 { 811 if (test_and_set_bit(0, &async_req_locks)) 812 return; 813 if (pmu_kind == PMU_OHARE_BASED) 814 pmu_request(&batt_req, done_battery_state_ohare, 815 1, PMU_BATTERY_STATE); 816 else 817 pmu_request(&batt_req, done_battery_state_smart, 818 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1); 819 } 820 821 static int 822 proc_get_info(char *page, char **start, off_t off, 823 int count, int *eof, void *data) 824 { 825 char* p = page; 826 827 p += sprintf(p, "PMU driver version : %d\n", PMU_DRIVER_VERSION); 828 p += sprintf(p, "PMU firmware version : %02x\n", pmu_version); 829 p += sprintf(p, "AC Power : %d\n", 830 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0)); 831 p += sprintf(p, "Battery count : %d\n", pmu_battery_count); 832 833 return p - page; 834 } 835 836 static int 837 proc_get_irqstats(char *page, char **start, off_t off, 838 int count, int *eof, void *data) 839 { 840 int i; 841 char* p = page; 842 static const char *irq_names[] = { 843 "Total CB1 triggered events", 844 "Total GPIO1 triggered events", 845 "PC-Card eject button", 846 "Sound/Brightness button", 847 "ADB message", 848 "Battery state change", 849 "Environment interrupt", 850 "Tick timer", 851 "Ghost interrupt (zero len)", 852 "Empty interrupt (empty mask)", 853 "Max irqs in a row" 854 }; 855 856 for (i=0; i<11; i++) { 857 p += sprintf(p, " %2u: %10u (%s)\n", 858 i, pmu_irq_stats[i], irq_names[i]); 859 } 860 return p - page; 861 } 862 863 static int 864 proc_get_batt(char *page, char **start, off_t off, 865 int count, int *eof, void *data) 866 { 867 long batnum = (long)data; 868 char *p = page; 869 870 p += sprintf(p, "\n"); 871 p += sprintf(p, "flags : %08x\n", 872 pmu_batteries[batnum].flags); 873 p += sprintf(p, "charge : %d\n", 874 pmu_batteries[batnum].charge); 875 p += sprintf(p, "max_charge : %d\n", 876 pmu_batteries[batnum].max_charge); 877 p += sprintf(p, "current : %d\n", 878 pmu_batteries[batnum].amperage); 879 p += sprintf(p, "voltage : %d\n", 880 pmu_batteries[batnum].voltage); 881 p += sprintf(p, "time rem. : %d\n", 882 pmu_batteries[batnum].time_remaining); 883 884 return p - page; 885 } 886 887 static int 888 proc_read_options(char *page, char **start, off_t off, 889 int count, int *eof, void *data) 890 { 891 char *p = page; 892 893 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 894 if (pmu_kind == PMU_KEYLARGO_BASED && 895 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 896 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup); 897 #endif 898 if (pmu_kind == PMU_KEYLARGO_BASED) 899 p += sprintf(p, "server_mode=%d\n", option_server_mode); 900 901 return p - page; 902 } 903 904 static int 905 proc_write_options(struct file *file, const char __user *buffer, 906 unsigned long count, void *data) 907 { 908 char tmp[33]; 909 char *label, *val; 910 unsigned long fcount = count; 911 912 if (!count) 913 return -EINVAL; 914 if (count > 32) 915 count = 32; 916 if (copy_from_user(tmp, buffer, count)) 917 return -EFAULT; 918 tmp[count] = 0; 919 920 label = tmp; 921 while(*label == ' ') 922 label++; 923 val = label; 924 while(*val && (*val != '=')) { 925 if (*val == ' ') 926 *val = 0; 927 val++; 928 } 929 if ((*val) == 0) 930 return -EINVAL; 931 *(val++) = 0; 932 while(*val == ' ') 933 val++; 934 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 935 if (pmu_kind == PMU_KEYLARGO_BASED && 936 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 937 if (!strcmp(label, "lid_wakeup")) 938 option_lid_wakeup = ((*val) == '1'); 939 #endif 940 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) { 941 int new_value; 942 new_value = ((*val) == '1'); 943 if (new_value != option_server_mode) 944 pmu_set_server_mode(new_value); 945 } 946 return fcount; 947 } 948 949 #ifdef CONFIG_ADB 950 /* Send an ADB command */ 951 static int 952 pmu_send_request(struct adb_request *req, int sync) 953 { 954 int i, ret; 955 956 if ((vias == NULL) || (!pmu_fully_inited)) { 957 req->complete = 1; 958 return -ENXIO; 959 } 960 961 ret = -EINVAL; 962 963 switch (req->data[0]) { 964 case PMU_PACKET: 965 for (i = 0; i < req->nbytes - 1; ++i) 966 req->data[i] = req->data[i+1]; 967 --req->nbytes; 968 if (pmu_data_len[req->data[0]][1] != 0) { 969 req->reply[0] = ADB_RET_OK; 970 req->reply_len = 1; 971 } else 972 req->reply_len = 0; 973 ret = pmu_queue_request(req); 974 break; 975 case CUDA_PACKET: 976 switch (req->data[1]) { 977 case CUDA_GET_TIME: 978 if (req->nbytes != 2) 979 break; 980 req->data[0] = PMU_READ_RTC; 981 req->nbytes = 1; 982 req->reply_len = 3; 983 req->reply[0] = CUDA_PACKET; 984 req->reply[1] = 0; 985 req->reply[2] = CUDA_GET_TIME; 986 ret = pmu_queue_request(req); 987 break; 988 case CUDA_SET_TIME: 989 if (req->nbytes != 6) 990 break; 991 req->data[0] = PMU_SET_RTC; 992 req->nbytes = 5; 993 for (i = 1; i <= 4; ++i) 994 req->data[i] = req->data[i+1]; 995 req->reply_len = 3; 996 req->reply[0] = CUDA_PACKET; 997 req->reply[1] = 0; 998 req->reply[2] = CUDA_SET_TIME; 999 ret = pmu_queue_request(req); 1000 break; 1001 } 1002 break; 1003 case ADB_PACKET: 1004 if (!pmu_has_adb) 1005 return -ENXIO; 1006 for (i = req->nbytes - 1; i > 1; --i) 1007 req->data[i+2] = req->data[i]; 1008 req->data[3] = req->nbytes - 2; 1009 req->data[2] = pmu_adb_flags; 1010 /*req->data[1] = req->data[1];*/ 1011 req->data[0] = PMU_ADB_CMD; 1012 req->nbytes += 2; 1013 req->reply_expected = 1; 1014 req->reply_len = 0; 1015 ret = pmu_queue_request(req); 1016 break; 1017 } 1018 if (ret) { 1019 req->complete = 1; 1020 return ret; 1021 } 1022 1023 if (sync) 1024 while (!req->complete) 1025 pmu_poll(); 1026 1027 return 0; 1028 } 1029 1030 /* Enable/disable autopolling */ 1031 static int 1032 pmu_adb_autopoll(int devs) 1033 { 1034 struct adb_request req; 1035 1036 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1037 return -ENXIO; 1038 1039 if (devs) { 1040 adb_dev_map = devs; 1041 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86, 1042 adb_dev_map >> 8, adb_dev_map); 1043 pmu_adb_flags = 2; 1044 } else { 1045 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF); 1046 pmu_adb_flags = 0; 1047 } 1048 while (!req.complete) 1049 pmu_poll(); 1050 return 0; 1051 } 1052 1053 /* Reset the ADB bus */ 1054 static int 1055 pmu_adb_reset_bus(void) 1056 { 1057 struct adb_request req; 1058 int save_autopoll = adb_dev_map; 1059 1060 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1061 return -ENXIO; 1062 1063 /* anyone got a better idea?? */ 1064 pmu_adb_autopoll(0); 1065 1066 req.nbytes = 5; 1067 req.done = NULL; 1068 req.data[0] = PMU_ADB_CMD; 1069 req.data[1] = 0; 1070 req.data[2] = ADB_BUSRESET; 1071 req.data[3] = 0; 1072 req.data[4] = 0; 1073 req.reply_len = 0; 1074 req.reply_expected = 1; 1075 if (pmu_queue_request(&req) != 0) { 1076 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n"); 1077 return -EIO; 1078 } 1079 pmu_wait_complete(&req); 1080 1081 if (save_autopoll != 0) 1082 pmu_adb_autopoll(save_autopoll); 1083 1084 return 0; 1085 } 1086 #endif /* CONFIG_ADB */ 1087 1088 /* Construct and send a pmu request */ 1089 int 1090 pmu_request(struct adb_request *req, void (*done)(struct adb_request *), 1091 int nbytes, ...) 1092 { 1093 va_list list; 1094 int i; 1095 1096 if (vias == NULL) 1097 return -ENXIO; 1098 1099 if (nbytes < 0 || nbytes > 32) { 1100 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes); 1101 req->complete = 1; 1102 return -EINVAL; 1103 } 1104 req->nbytes = nbytes; 1105 req->done = done; 1106 va_start(list, nbytes); 1107 for (i = 0; i < nbytes; ++i) 1108 req->data[i] = va_arg(list, int); 1109 va_end(list); 1110 req->reply_len = 0; 1111 req->reply_expected = 0; 1112 return pmu_queue_request(req); 1113 } 1114 1115 int 1116 pmu_queue_request(struct adb_request *req) 1117 { 1118 unsigned long flags; 1119 int nsend; 1120 1121 if (via == NULL) { 1122 req->complete = 1; 1123 return -ENXIO; 1124 } 1125 if (req->nbytes <= 0) { 1126 req->complete = 1; 1127 return 0; 1128 } 1129 nsend = pmu_data_len[req->data[0]][0]; 1130 if (nsend >= 0 && req->nbytes != nsend + 1) { 1131 req->complete = 1; 1132 return -EINVAL; 1133 } 1134 1135 req->next = NULL; 1136 req->sent = 0; 1137 req->complete = 0; 1138 1139 spin_lock_irqsave(&pmu_lock, flags); 1140 if (current_req != 0) { 1141 last_req->next = req; 1142 last_req = req; 1143 } else { 1144 current_req = req; 1145 last_req = req; 1146 if (pmu_state == idle) 1147 pmu_start(); 1148 } 1149 spin_unlock_irqrestore(&pmu_lock, flags); 1150 1151 return 0; 1152 } 1153 1154 static inline void 1155 wait_for_ack(void) 1156 { 1157 /* Sightly increased the delay, I had one occurrence of the message 1158 * reported 1159 */ 1160 int timeout = 4000; 1161 while ((in_8(&via[B]) & TACK) == 0) { 1162 if (--timeout < 0) { 1163 printk(KERN_ERR "PMU not responding (!ack)\n"); 1164 return; 1165 } 1166 udelay(10); 1167 } 1168 } 1169 1170 /* New PMU seems to be very sensitive to those timings, so we make sure 1171 * PCI is flushed immediately */ 1172 static inline void 1173 send_byte(int x) 1174 { 1175 volatile unsigned char __iomem *v = via; 1176 1177 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT); 1178 out_8(&v[SR], x); 1179 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */ 1180 (void)in_8(&v[B]); 1181 } 1182 1183 static inline void 1184 recv_byte(void) 1185 { 1186 volatile unsigned char __iomem *v = via; 1187 1188 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT); 1189 in_8(&v[SR]); /* resets SR */ 1190 out_8(&v[B], in_8(&v[B]) & ~TREQ); 1191 (void)in_8(&v[B]); 1192 } 1193 1194 static inline void 1195 pmu_done(struct adb_request *req) 1196 { 1197 void (*done)(struct adb_request *) = req->done; 1198 mb(); 1199 req->complete = 1; 1200 /* Here, we assume that if the request has a done member, the 1201 * struct request will survive to setting req->complete to 1 1202 */ 1203 if (done) 1204 (*done)(req); 1205 } 1206 1207 static void 1208 pmu_start(void) 1209 { 1210 struct adb_request *req; 1211 1212 /* assert pmu_state == idle */ 1213 /* get the packet to send */ 1214 req = current_req; 1215 if (req == 0 || pmu_state != idle 1216 || (/*req->reply_expected && */req_awaiting_reply)) 1217 return; 1218 1219 pmu_state = sending; 1220 data_index = 1; 1221 data_len = pmu_data_len[req->data[0]][0]; 1222 1223 /* Sounds safer to make sure ACK is high before writing. This helped 1224 * kill a problem with ADB and some iBooks 1225 */ 1226 wait_for_ack(); 1227 /* set the shift register to shift out and send a byte */ 1228 send_byte(req->data[0]); 1229 } 1230 1231 void 1232 pmu_poll(void) 1233 { 1234 if (!via) 1235 return; 1236 if (disable_poll) 1237 return; 1238 via_pmu_interrupt(0, NULL, NULL); 1239 } 1240 1241 void 1242 pmu_poll_adb(void) 1243 { 1244 if (!via) 1245 return; 1246 if (disable_poll) 1247 return; 1248 /* Kicks ADB read when PMU is suspended */ 1249 adb_int_pending = 1; 1250 do { 1251 via_pmu_interrupt(0, NULL, NULL); 1252 } while (pmu_suspended && (adb_int_pending || pmu_state != idle 1253 || req_awaiting_reply)); 1254 } 1255 1256 void 1257 pmu_wait_complete(struct adb_request *req) 1258 { 1259 if (!via) 1260 return; 1261 while((pmu_state != idle && pmu_state != locked) || !req->complete) 1262 via_pmu_interrupt(0, NULL, NULL); 1263 } 1264 1265 /* This function loops until the PMU is idle and prevents it from 1266 * anwsering to ADB interrupts. pmu_request can still be called. 1267 * This is done to avoid spurrious shutdowns when we know we'll have 1268 * interrupts switched off for a long time 1269 */ 1270 void 1271 pmu_suspend(void) 1272 { 1273 unsigned long flags; 1274 #ifdef SUSPEND_USES_PMU 1275 struct adb_request *req; 1276 #endif 1277 if (!via) 1278 return; 1279 1280 spin_lock_irqsave(&pmu_lock, flags); 1281 pmu_suspended++; 1282 if (pmu_suspended > 1) { 1283 spin_unlock_irqrestore(&pmu_lock, flags); 1284 return; 1285 } 1286 1287 do { 1288 spin_unlock_irqrestore(&pmu_lock, flags); 1289 if (req_awaiting_reply) 1290 adb_int_pending = 1; 1291 via_pmu_interrupt(0, NULL, NULL); 1292 spin_lock_irqsave(&pmu_lock, flags); 1293 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) { 1294 #ifdef SUSPEND_USES_PMU 1295 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 1296 spin_unlock_irqrestore(&pmu_lock, flags); 1297 while(!req.complete) 1298 pmu_poll(); 1299 #else /* SUSPEND_USES_PMU */ 1300 if (gpio_irq >= 0) 1301 disable_irq_nosync(gpio_irq); 1302 out_8(&via[IER], CB1_INT | IER_CLR); 1303 spin_unlock_irqrestore(&pmu_lock, flags); 1304 #endif /* SUSPEND_USES_PMU */ 1305 break; 1306 } 1307 } while (1); 1308 } 1309 1310 void 1311 pmu_resume(void) 1312 { 1313 unsigned long flags; 1314 1315 if (!via || (pmu_suspended < 1)) 1316 return; 1317 1318 spin_lock_irqsave(&pmu_lock, flags); 1319 pmu_suspended--; 1320 if (pmu_suspended > 0) { 1321 spin_unlock_irqrestore(&pmu_lock, flags); 1322 return; 1323 } 1324 adb_int_pending = 1; 1325 #ifdef SUSPEND_USES_PMU 1326 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1327 spin_unlock_irqrestore(&pmu_lock, flags); 1328 while(!req.complete) 1329 pmu_poll(); 1330 #else /* SUSPEND_USES_PMU */ 1331 if (gpio_irq >= 0) 1332 enable_irq(gpio_irq); 1333 out_8(&via[IER], CB1_INT | IER_SET); 1334 spin_unlock_irqrestore(&pmu_lock, flags); 1335 pmu_poll(); 1336 #endif /* SUSPEND_USES_PMU */ 1337 } 1338 1339 /* Interrupt data could be the result data from an ADB cmd */ 1340 static void 1341 pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs) 1342 { 1343 unsigned char ints, pirq; 1344 int i = 0; 1345 1346 asleep = 0; 1347 if (drop_interrupts || len < 1) { 1348 adb_int_pending = 0; 1349 pmu_irq_stats[8]++; 1350 return; 1351 } 1352 1353 /* Get PMU interrupt mask */ 1354 ints = data[0]; 1355 1356 /* Record zero interrupts for stats */ 1357 if (ints == 0) 1358 pmu_irq_stats[9]++; 1359 1360 /* Hack to deal with ADB autopoll flag */ 1361 if (ints & PMU_INT_ADB) 1362 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL); 1363 1364 next: 1365 1366 if (ints == 0) { 1367 if (i > pmu_irq_stats[10]) 1368 pmu_irq_stats[10] = i; 1369 return; 1370 } 1371 1372 for (pirq = 0; pirq < 8; pirq++) 1373 if (ints & (1 << pirq)) 1374 break; 1375 pmu_irq_stats[pirq]++; 1376 i++; 1377 ints &= ~(1 << pirq); 1378 1379 /* Note: for some reason, we get an interrupt with len=1, 1380 * data[0]==0 after each normal ADB interrupt, at least 1381 * on the Pismo. Still investigating... --BenH 1382 */ 1383 if ((1 << pirq) & PMU_INT_ADB) { 1384 if ((data[0] & PMU_INT_ADB_AUTO) == 0) { 1385 struct adb_request *req = req_awaiting_reply; 1386 if (req == 0) { 1387 printk(KERN_ERR "PMU: extra ADB reply\n"); 1388 return; 1389 } 1390 req_awaiting_reply = NULL; 1391 if (len <= 2) 1392 req->reply_len = 0; 1393 else { 1394 memcpy(req->reply, data + 1, len - 1); 1395 req->reply_len = len - 1; 1396 } 1397 pmu_done(req); 1398 } else { 1399 if (len == 4 && data[1] == 0x2c) { 1400 extern int xmon_wants_key, xmon_adb_keycode; 1401 if (xmon_wants_key) { 1402 xmon_adb_keycode = data[2]; 1403 return; 1404 } 1405 } 1406 #ifdef CONFIG_ADB 1407 /* 1408 * XXX On the [23]400 the PMU gives us an up 1409 * event for keycodes 0x74 or 0x75 when the PC 1410 * card eject buttons are released, so we 1411 * ignore those events. 1412 */ 1413 if (!(pmu_kind == PMU_OHARE_BASED && len == 4 1414 && data[1] == 0x2c && data[3] == 0xff 1415 && (data[2] & ~1) == 0xf4)) 1416 adb_input(data+1, len-1, regs, 1); 1417 #endif /* CONFIG_ADB */ 1418 } 1419 } 1420 /* Sound/brightness button pressed */ 1421 else if ((1 << pirq) & PMU_INT_SNDBRT) { 1422 #ifdef CONFIG_PMAC_BACKLIGHT 1423 if (len == 3) 1424 #ifdef CONFIG_INPUT_ADBHID 1425 if (!disable_kernel_backlight) 1426 #endif /* CONFIG_INPUT_ADBHID */ 1427 set_backlight_level(data[1] >> 4); 1428 #endif /* CONFIG_PMAC_BACKLIGHT */ 1429 } 1430 /* Tick interrupt */ 1431 else if ((1 << pirq) & PMU_INT_TICK) { 1432 /* Environement or tick interrupt, query batteries */ 1433 if (pmu_battery_count) { 1434 if ((--query_batt_timer) == 0) { 1435 query_battery_state(); 1436 query_batt_timer = BATTERY_POLLING_COUNT; 1437 } 1438 } 1439 } 1440 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) { 1441 if (pmu_battery_count) 1442 query_battery_state(); 1443 pmu_pass_intr(data, len); 1444 } else { 1445 pmu_pass_intr(data, len); 1446 } 1447 goto next; 1448 } 1449 1450 static struct adb_request* 1451 pmu_sr_intr(struct pt_regs *regs) 1452 { 1453 struct adb_request *req; 1454 int bite = 0; 1455 1456 if (via[B] & TREQ) { 1457 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]); 1458 out_8(&via[IFR], SR_INT); 1459 return NULL; 1460 } 1461 /* The ack may not yet be low when we get the interrupt */ 1462 while ((in_8(&via[B]) & TACK) != 0) 1463 ; 1464 1465 /* if reading grab the byte, and reset the interrupt */ 1466 if (pmu_state == reading || pmu_state == reading_intr) 1467 bite = in_8(&via[SR]); 1468 1469 /* reset TREQ and wait for TACK to go high */ 1470 out_8(&via[B], in_8(&via[B]) | TREQ); 1471 wait_for_ack(); 1472 1473 switch (pmu_state) { 1474 case sending: 1475 req = current_req; 1476 if (data_len < 0) { 1477 data_len = req->nbytes - 1; 1478 send_byte(data_len); 1479 break; 1480 } 1481 if (data_index <= data_len) { 1482 send_byte(req->data[data_index++]); 1483 break; 1484 } 1485 req->sent = 1; 1486 data_len = pmu_data_len[req->data[0]][1]; 1487 if (data_len == 0) { 1488 pmu_state = idle; 1489 current_req = req->next; 1490 if (req->reply_expected) 1491 req_awaiting_reply = req; 1492 else 1493 return req; 1494 } else { 1495 pmu_state = reading; 1496 data_index = 0; 1497 reply_ptr = req->reply + req->reply_len; 1498 recv_byte(); 1499 } 1500 break; 1501 1502 case intack: 1503 data_index = 0; 1504 data_len = -1; 1505 pmu_state = reading_intr; 1506 reply_ptr = interrupt_data[int_data_last]; 1507 recv_byte(); 1508 if (gpio_irq >= 0 && !gpio_irq_enabled) { 1509 enable_irq(gpio_irq); 1510 gpio_irq_enabled = 1; 1511 } 1512 break; 1513 1514 case reading: 1515 case reading_intr: 1516 if (data_len == -1) { 1517 data_len = bite; 1518 if (bite > 32) 1519 printk(KERN_ERR "PMU: bad reply len %d\n", bite); 1520 } else if (data_index < 32) { 1521 reply_ptr[data_index++] = bite; 1522 } 1523 if (data_index < data_len) { 1524 recv_byte(); 1525 break; 1526 } 1527 1528 if (pmu_state == reading_intr) { 1529 pmu_state = idle; 1530 int_data_state[int_data_last] = int_data_ready; 1531 interrupt_data_len[int_data_last] = data_len; 1532 } else { 1533 req = current_req; 1534 /* 1535 * For PMU sleep and freq change requests, we lock the 1536 * PMU until it's explicitely unlocked. This avoids any 1537 * spurrious event polling getting in 1538 */ 1539 current_req = req->next; 1540 req->reply_len += data_index; 1541 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED) 1542 pmu_state = locked; 1543 else 1544 pmu_state = idle; 1545 return req; 1546 } 1547 break; 1548 1549 default: 1550 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n", 1551 pmu_state); 1552 } 1553 return NULL; 1554 } 1555 1556 static irqreturn_t 1557 via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs) 1558 { 1559 unsigned long flags; 1560 int intr; 1561 int nloop = 0; 1562 int int_data = -1; 1563 struct adb_request *req = NULL; 1564 int handled = 0; 1565 1566 /* This is a bit brutal, we can probably do better */ 1567 spin_lock_irqsave(&pmu_lock, flags); 1568 ++disable_poll; 1569 1570 for (;;) { 1571 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT); 1572 if (intr == 0) 1573 break; 1574 handled = 1; 1575 if (++nloop > 1000) { 1576 printk(KERN_DEBUG "PMU: stuck in intr loop, " 1577 "intr=%x, ier=%x pmu_state=%d\n", 1578 intr, in_8(&via[IER]), pmu_state); 1579 break; 1580 } 1581 out_8(&via[IFR], intr); 1582 if (intr & CB1_INT) { 1583 adb_int_pending = 1; 1584 pmu_irq_stats[0]++; 1585 } 1586 if (intr & SR_INT) { 1587 req = pmu_sr_intr(regs); 1588 if (req) 1589 break; 1590 } 1591 } 1592 1593 recheck: 1594 if (pmu_state == idle) { 1595 if (adb_int_pending) { 1596 if (int_data_state[0] == int_data_empty) 1597 int_data_last = 0; 1598 else if (int_data_state[1] == int_data_empty) 1599 int_data_last = 1; 1600 else 1601 goto no_free_slot; 1602 pmu_state = intack; 1603 int_data_state[int_data_last] = int_data_fill; 1604 /* Sounds safer to make sure ACK is high before writing. 1605 * This helped kill a problem with ADB and some iBooks 1606 */ 1607 wait_for_ack(); 1608 send_byte(PMU_INT_ACK); 1609 adb_int_pending = 0; 1610 } else if (current_req) 1611 pmu_start(); 1612 } 1613 no_free_slot: 1614 /* Mark the oldest buffer for flushing */ 1615 if (int_data_state[!int_data_last] == int_data_ready) { 1616 int_data_state[!int_data_last] = int_data_flush; 1617 int_data = !int_data_last; 1618 } else if (int_data_state[int_data_last] == int_data_ready) { 1619 int_data_state[int_data_last] = int_data_flush; 1620 int_data = int_data_last; 1621 } 1622 --disable_poll; 1623 spin_unlock_irqrestore(&pmu_lock, flags); 1624 1625 /* Deal with completed PMU requests outside of the lock */ 1626 if (req) { 1627 pmu_done(req); 1628 req = NULL; 1629 } 1630 1631 /* Deal with interrupt datas outside of the lock */ 1632 if (int_data >= 0) { 1633 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs); 1634 spin_lock_irqsave(&pmu_lock, flags); 1635 ++disable_poll; 1636 int_data_state[int_data] = int_data_empty; 1637 int_data = -1; 1638 goto recheck; 1639 } 1640 1641 return IRQ_RETVAL(handled); 1642 } 1643 1644 void 1645 pmu_unlock(void) 1646 { 1647 unsigned long flags; 1648 1649 spin_lock_irqsave(&pmu_lock, flags); 1650 if (pmu_state == locked) 1651 pmu_state = idle; 1652 adb_int_pending = 1; 1653 spin_unlock_irqrestore(&pmu_lock, flags); 1654 } 1655 1656 1657 static irqreturn_t 1658 gpio1_interrupt(int irq, void *arg, struct pt_regs *regs) 1659 { 1660 unsigned long flags; 1661 1662 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) { 1663 spin_lock_irqsave(&pmu_lock, flags); 1664 if (gpio_irq_enabled > 0) { 1665 disable_irq_nosync(gpio_irq); 1666 gpio_irq_enabled = 0; 1667 } 1668 pmu_irq_stats[1]++; 1669 adb_int_pending = 1; 1670 spin_unlock_irqrestore(&pmu_lock, flags); 1671 via_pmu_interrupt(0, NULL, NULL); 1672 return IRQ_HANDLED; 1673 } 1674 return IRQ_NONE; 1675 } 1676 1677 #ifdef CONFIG_PMAC_BACKLIGHT 1678 static int backlight_to_bright[] = { 1679 0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e, 1680 0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e 1681 }; 1682 1683 static int 1684 pmu_set_backlight_enable(int on, int level, void* data) 1685 { 1686 struct adb_request req; 1687 1688 if (vias == NULL) 1689 return -ENODEV; 1690 1691 if (on) { 1692 pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT, 1693 backlight_to_bright[level]); 1694 pmu_wait_complete(&req); 1695 } 1696 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1697 PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF)); 1698 pmu_wait_complete(&req); 1699 1700 return 0; 1701 } 1702 1703 static void 1704 pmu_bright_complete(struct adb_request *req) 1705 { 1706 if (req == &bright_req_1) 1707 clear_bit(1, &async_req_locks); 1708 if (req == &bright_req_2) 1709 clear_bit(2, &async_req_locks); 1710 } 1711 1712 static int 1713 pmu_set_backlight_level(int level, void* data) 1714 { 1715 if (vias == NULL) 1716 return -ENODEV; 1717 1718 if (test_and_set_bit(1, &async_req_locks)) 1719 return -EAGAIN; 1720 pmu_request(&bright_req_1, pmu_bright_complete, 2, PMU_BACKLIGHT_BRIGHT, 1721 backlight_to_bright[level]); 1722 if (test_and_set_bit(2, &async_req_locks)) 1723 return -EAGAIN; 1724 pmu_request(&bright_req_2, pmu_bright_complete, 2, PMU_POWER_CTRL, 1725 PMU_POW_BACKLIGHT | (level > BACKLIGHT_OFF ? 1726 PMU_POW_ON : PMU_POW_OFF)); 1727 1728 return 0; 1729 } 1730 #endif /* CONFIG_PMAC_BACKLIGHT */ 1731 1732 void 1733 pmu_enable_irled(int on) 1734 { 1735 struct adb_request req; 1736 1737 if (vias == NULL) 1738 return ; 1739 if (pmu_kind == PMU_KEYLARGO_BASED) 1740 return ; 1741 1742 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED | 1743 (on ? PMU_POW_ON : PMU_POW_OFF)); 1744 pmu_wait_complete(&req); 1745 } 1746 1747 void 1748 pmu_restart(void) 1749 { 1750 struct adb_request req; 1751 1752 if (via == NULL) 1753 return; 1754 1755 local_irq_disable(); 1756 1757 drop_interrupts = 1; 1758 1759 if (pmu_kind != PMU_KEYLARGO_BASED) { 1760 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1761 PMU_INT_TICK ); 1762 while(!req.complete) 1763 pmu_poll(); 1764 } 1765 1766 pmu_request(&req, NULL, 1, PMU_RESET); 1767 pmu_wait_complete(&req); 1768 for (;;) 1769 ; 1770 } 1771 1772 void 1773 pmu_shutdown(void) 1774 { 1775 struct adb_request req; 1776 1777 if (via == NULL) 1778 return; 1779 1780 local_irq_disable(); 1781 1782 drop_interrupts = 1; 1783 1784 if (pmu_kind != PMU_KEYLARGO_BASED) { 1785 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1786 PMU_INT_TICK ); 1787 pmu_wait_complete(&req); 1788 } else { 1789 /* Disable server mode on shutdown or we'll just 1790 * wake up again 1791 */ 1792 pmu_set_server_mode(0); 1793 } 1794 1795 pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 1796 'M', 'A', 'T', 'T'); 1797 pmu_wait_complete(&req); 1798 for (;;) 1799 ; 1800 } 1801 1802 int 1803 pmu_present(void) 1804 { 1805 return via != 0; 1806 } 1807 1808 struct pmu_i2c_hdr { 1809 u8 bus; 1810 u8 mode; 1811 u8 bus2; 1812 u8 address; 1813 u8 sub_addr; 1814 u8 comb_addr; 1815 u8 count; 1816 }; 1817 1818 int 1819 pmu_i2c_combined_read(int bus, int addr, int subaddr, u8* data, int len) 1820 { 1821 struct adb_request req; 1822 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1]; 1823 int retry; 1824 int rc; 1825 1826 for (retry=0; retry<16; retry++) { 1827 memset(&req, 0, sizeof(req)); 1828 1829 hdr->bus = bus; 1830 hdr->address = addr & 0xfe; 1831 hdr->mode = PMU_I2C_MODE_COMBINED; 1832 hdr->bus2 = 0; 1833 hdr->sub_addr = subaddr; 1834 hdr->comb_addr = addr | 1; 1835 hdr->count = len; 1836 1837 req.nbytes = sizeof(struct pmu_i2c_hdr) + 1; 1838 req.reply_expected = 0; 1839 req.reply_len = 0; 1840 req.data[0] = PMU_I2C_CMD; 1841 req.reply[0] = 0xff; 1842 rc = pmu_queue_request(&req); 1843 if (rc) 1844 return rc; 1845 while(!req.complete) 1846 pmu_poll(); 1847 if (req.reply[0] == PMU_I2C_STATUS_OK) 1848 break; 1849 mdelay(15); 1850 } 1851 if (req.reply[0] != PMU_I2C_STATUS_OK) 1852 return -1; 1853 1854 for (retry=0; retry<16; retry++) { 1855 memset(&req, 0, sizeof(req)); 1856 1857 mdelay(15); 1858 1859 hdr->bus = PMU_I2C_BUS_STATUS; 1860 req.reply[0] = 0xff; 1861 1862 req.nbytes = 2; 1863 req.reply_expected = 0; 1864 req.reply_len = 0; 1865 req.data[0] = PMU_I2C_CMD; 1866 rc = pmu_queue_request(&req); 1867 if (rc) 1868 return rc; 1869 while(!req.complete) 1870 pmu_poll(); 1871 if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) { 1872 memcpy(data, &req.reply[1], req.reply_len - 1); 1873 return req.reply_len - 1; 1874 } 1875 } 1876 return -1; 1877 } 1878 1879 int 1880 pmu_i2c_stdsub_write(int bus, int addr, int subaddr, u8* data, int len) 1881 { 1882 struct adb_request req; 1883 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1]; 1884 int retry; 1885 int rc; 1886 1887 for (retry=0; retry<16; retry++) { 1888 memset(&req, 0, sizeof(req)); 1889 1890 hdr->bus = bus; 1891 hdr->address = addr & 0xfe; 1892 hdr->mode = PMU_I2C_MODE_STDSUB; 1893 hdr->bus2 = 0; 1894 hdr->sub_addr = subaddr; 1895 hdr->comb_addr = addr & 0xfe; 1896 hdr->count = len; 1897 1898 req.data[0] = PMU_I2C_CMD; 1899 memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len); 1900 req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1; 1901 req.reply_expected = 0; 1902 req.reply_len = 0; 1903 req.reply[0] = 0xff; 1904 rc = pmu_queue_request(&req); 1905 if (rc) 1906 return rc; 1907 while(!req.complete) 1908 pmu_poll(); 1909 if (req.reply[0] == PMU_I2C_STATUS_OK) 1910 break; 1911 mdelay(15); 1912 } 1913 if (req.reply[0] != PMU_I2C_STATUS_OK) 1914 return -1; 1915 1916 for (retry=0; retry<16; retry++) { 1917 memset(&req, 0, sizeof(req)); 1918 1919 mdelay(15); 1920 1921 hdr->bus = PMU_I2C_BUS_STATUS; 1922 req.reply[0] = 0xff; 1923 1924 req.nbytes = 2; 1925 req.reply_expected = 0; 1926 req.reply_len = 0; 1927 req.data[0] = PMU_I2C_CMD; 1928 rc = pmu_queue_request(&req); 1929 if (rc) 1930 return rc; 1931 while(!req.complete) 1932 pmu_poll(); 1933 if (req.reply[0] == PMU_I2C_STATUS_OK) 1934 return len; 1935 } 1936 return -1; 1937 } 1938 1939 int 1940 pmu_i2c_simple_read(int bus, int addr, u8* data, int len) 1941 { 1942 struct adb_request req; 1943 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1]; 1944 int retry; 1945 int rc; 1946 1947 for (retry=0; retry<16; retry++) { 1948 memset(&req, 0, sizeof(req)); 1949 1950 hdr->bus = bus; 1951 hdr->address = addr | 1; 1952 hdr->mode = PMU_I2C_MODE_SIMPLE; 1953 hdr->bus2 = 0; 1954 hdr->sub_addr = 0; 1955 hdr->comb_addr = 0; 1956 hdr->count = len; 1957 1958 req.data[0] = PMU_I2C_CMD; 1959 req.nbytes = sizeof(struct pmu_i2c_hdr) + 1; 1960 req.reply_expected = 0; 1961 req.reply_len = 0; 1962 req.reply[0] = 0xff; 1963 rc = pmu_queue_request(&req); 1964 if (rc) 1965 return rc; 1966 while(!req.complete) 1967 pmu_poll(); 1968 if (req.reply[0] == PMU_I2C_STATUS_OK) 1969 break; 1970 mdelay(15); 1971 } 1972 if (req.reply[0] != PMU_I2C_STATUS_OK) 1973 return -1; 1974 1975 for (retry=0; retry<16; retry++) { 1976 memset(&req, 0, sizeof(req)); 1977 1978 mdelay(15); 1979 1980 hdr->bus = PMU_I2C_BUS_STATUS; 1981 req.reply[0] = 0xff; 1982 1983 req.nbytes = 2; 1984 req.reply_expected = 0; 1985 req.reply_len = 0; 1986 req.data[0] = PMU_I2C_CMD; 1987 rc = pmu_queue_request(&req); 1988 if (rc) 1989 return rc; 1990 while(!req.complete) 1991 pmu_poll(); 1992 if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) { 1993 memcpy(data, &req.reply[1], req.reply_len - 1); 1994 return req.reply_len - 1; 1995 } 1996 } 1997 return -1; 1998 } 1999 2000 int 2001 pmu_i2c_simple_write(int bus, int addr, u8* data, int len) 2002 { 2003 struct adb_request req; 2004 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1]; 2005 int retry; 2006 int rc; 2007 2008 for (retry=0; retry<16; retry++) { 2009 memset(&req, 0, sizeof(req)); 2010 2011 hdr->bus = bus; 2012 hdr->address = addr & 0xfe; 2013 hdr->mode = PMU_I2C_MODE_SIMPLE; 2014 hdr->bus2 = 0; 2015 hdr->sub_addr = 0; 2016 hdr->comb_addr = 0; 2017 hdr->count = len; 2018 2019 req.data[0] = PMU_I2C_CMD; 2020 memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len); 2021 req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1; 2022 req.reply_expected = 0; 2023 req.reply_len = 0; 2024 req.reply[0] = 0xff; 2025 rc = pmu_queue_request(&req); 2026 if (rc) 2027 return rc; 2028 while(!req.complete) 2029 pmu_poll(); 2030 if (req.reply[0] == PMU_I2C_STATUS_OK) 2031 break; 2032 mdelay(15); 2033 } 2034 if (req.reply[0] != PMU_I2C_STATUS_OK) 2035 return -1; 2036 2037 for (retry=0; retry<16; retry++) { 2038 memset(&req, 0, sizeof(req)); 2039 2040 mdelay(15); 2041 2042 hdr->bus = PMU_I2C_BUS_STATUS; 2043 req.reply[0] = 0xff; 2044 2045 req.nbytes = 2; 2046 req.reply_expected = 0; 2047 req.reply_len = 0; 2048 req.data[0] = PMU_I2C_CMD; 2049 rc = pmu_queue_request(&req); 2050 if (rc) 2051 return rc; 2052 while(!req.complete) 2053 pmu_poll(); 2054 if (req.reply[0] == PMU_I2C_STATUS_OK) 2055 return len; 2056 } 2057 return -1; 2058 } 2059 2060 #ifdef CONFIG_PM 2061 2062 static LIST_HEAD(sleep_notifiers); 2063 2064 int 2065 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n) 2066 { 2067 struct list_head *list; 2068 struct pmu_sleep_notifier *notifier; 2069 2070 for (list = sleep_notifiers.next; list != &sleep_notifiers; 2071 list = list->next) { 2072 notifier = list_entry(list, struct pmu_sleep_notifier, list); 2073 if (n->priority > notifier->priority) 2074 break; 2075 } 2076 __list_add(&n->list, list->prev, list); 2077 return 0; 2078 } 2079 EXPORT_SYMBOL(pmu_register_sleep_notifier); 2080 2081 int 2082 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n) 2083 { 2084 if (n->list.next == 0) 2085 return -ENOENT; 2086 list_del(&n->list); 2087 n->list.next = NULL; 2088 return 0; 2089 } 2090 EXPORT_SYMBOL(pmu_unregister_sleep_notifier); 2091 #endif /* CONFIG_PM */ 2092 2093 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2094 2095 /* Sleep is broadcast last-to-first */ 2096 static int 2097 broadcast_sleep(int when, int fallback) 2098 { 2099 int ret = PBOOK_SLEEP_OK; 2100 struct list_head *list; 2101 struct pmu_sleep_notifier *notifier; 2102 2103 for (list = sleep_notifiers.prev; list != &sleep_notifiers; 2104 list = list->prev) { 2105 notifier = list_entry(list, struct pmu_sleep_notifier, list); 2106 ret = notifier->notifier_call(notifier, when); 2107 if (ret != PBOOK_SLEEP_OK) { 2108 printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n", 2109 when, notifier, notifier->notifier_call); 2110 for (; list != &sleep_notifiers; list = list->next) { 2111 notifier = list_entry(list, struct pmu_sleep_notifier, list); 2112 notifier->notifier_call(notifier, fallback); 2113 } 2114 return ret; 2115 } 2116 } 2117 return ret; 2118 } 2119 2120 /* Wake is broadcast first-to-last */ 2121 static int 2122 broadcast_wake(void) 2123 { 2124 int ret = PBOOK_SLEEP_OK; 2125 struct list_head *list; 2126 struct pmu_sleep_notifier *notifier; 2127 2128 for (list = sleep_notifiers.next; list != &sleep_notifiers; 2129 list = list->next) { 2130 notifier = list_entry(list, struct pmu_sleep_notifier, list); 2131 notifier->notifier_call(notifier, PBOOK_WAKE); 2132 } 2133 return ret; 2134 } 2135 2136 /* 2137 * This struct is used to store config register values for 2138 * PCI devices which may get powered off when we sleep. 2139 */ 2140 static struct pci_save { 2141 #ifndef HACKED_PCI_SAVE 2142 u16 command; 2143 u16 cache_lat; 2144 u16 intr; 2145 u32 rom_address; 2146 #else 2147 u32 config[16]; 2148 #endif 2149 } *pbook_pci_saves; 2150 static int pbook_npci_saves; 2151 2152 static void 2153 pbook_alloc_pci_save(void) 2154 { 2155 int npci; 2156 struct pci_dev *pd = NULL; 2157 2158 npci = 0; 2159 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 2160 ++npci; 2161 } 2162 if (npci == 0) 2163 return; 2164 pbook_pci_saves = (struct pci_save *) 2165 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL); 2166 pbook_npci_saves = npci; 2167 } 2168 2169 static void 2170 pbook_free_pci_save(void) 2171 { 2172 if (pbook_pci_saves == NULL) 2173 return; 2174 kfree(pbook_pci_saves); 2175 pbook_pci_saves = NULL; 2176 pbook_npci_saves = 0; 2177 } 2178 2179 static void 2180 pbook_pci_save(void) 2181 { 2182 struct pci_save *ps = pbook_pci_saves; 2183 struct pci_dev *pd = NULL; 2184 int npci = pbook_npci_saves; 2185 2186 if (ps == NULL) 2187 return; 2188 2189 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 2190 if (npci-- == 0) 2191 return; 2192 #ifndef HACKED_PCI_SAVE 2193 pci_read_config_word(pd, PCI_COMMAND, &ps->command); 2194 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat); 2195 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr); 2196 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address); 2197 #else 2198 int i; 2199 for (i=1;i<16;i++) 2200 pci_read_config_dword(pd, i<<4, &ps->config[i]); 2201 #endif 2202 ++ps; 2203 } 2204 } 2205 2206 /* For this to work, we must take care of a few things: If gmac was enabled 2207 * during boot, it will be in the pci dev list. If it's disabled at this point 2208 * (and it will probably be), then you can't access it's config space. 2209 */ 2210 static void 2211 pbook_pci_restore(void) 2212 { 2213 u16 cmd; 2214 struct pci_save *ps = pbook_pci_saves - 1; 2215 struct pci_dev *pd = NULL; 2216 int npci = pbook_npci_saves; 2217 int j; 2218 2219 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 2220 #ifdef HACKED_PCI_SAVE 2221 int i; 2222 if (npci-- == 0) 2223 return; 2224 ps++; 2225 for (i=2;i<16;i++) 2226 pci_write_config_dword(pd, i<<4, ps->config[i]); 2227 pci_write_config_dword(pd, 4, ps->config[1]); 2228 #else 2229 if (npci-- == 0) 2230 return; 2231 ps++; 2232 if (ps->command == 0) 2233 continue; 2234 pci_read_config_word(pd, PCI_COMMAND, &cmd); 2235 if ((ps->command & ~cmd) == 0) 2236 continue; 2237 switch (pd->hdr_type) { 2238 case PCI_HEADER_TYPE_NORMAL: 2239 for (j = 0; j < 6; ++j) 2240 pci_write_config_dword(pd, 2241 PCI_BASE_ADDRESS_0 + j*4, 2242 pd->resource[j].start); 2243 pci_write_config_dword(pd, PCI_ROM_ADDRESS, 2244 ps->rom_address); 2245 pci_write_config_word(pd, PCI_CACHE_LINE_SIZE, 2246 ps->cache_lat); 2247 pci_write_config_word(pd, PCI_INTERRUPT_LINE, 2248 ps->intr); 2249 pci_write_config_word(pd, PCI_COMMAND, ps->command); 2250 break; 2251 } 2252 #endif 2253 } 2254 } 2255 2256 #ifdef DEBUG_SLEEP 2257 /* N.B. This doesn't work on the 3400 */ 2258 void 2259 pmu_blink(int n) 2260 { 2261 struct adb_request req; 2262 2263 memset(&req, 0, sizeof(req)); 2264 2265 for (; n > 0; --n) { 2266 req.nbytes = 4; 2267 req.done = NULL; 2268 req.data[0] = 0xee; 2269 req.data[1] = 4; 2270 req.data[2] = 0; 2271 req.data[3] = 1; 2272 req.reply[0] = ADB_RET_OK; 2273 req.reply_len = 1; 2274 req.reply_expected = 0; 2275 pmu_polled_request(&req); 2276 mdelay(50); 2277 req.nbytes = 4; 2278 req.done = NULL; 2279 req.data[0] = 0xee; 2280 req.data[1] = 4; 2281 req.data[2] = 0; 2282 req.data[3] = 0; 2283 req.reply[0] = ADB_RET_OK; 2284 req.reply_len = 1; 2285 req.reply_expected = 0; 2286 pmu_polled_request(&req); 2287 mdelay(50); 2288 } 2289 mdelay(50); 2290 } 2291 #endif 2292 2293 /* 2294 * Put the powerbook to sleep. 2295 */ 2296 2297 static u32 save_via[8]; 2298 2299 static void 2300 save_via_state(void) 2301 { 2302 save_via[0] = in_8(&via[ANH]); 2303 save_via[1] = in_8(&via[DIRA]); 2304 save_via[2] = in_8(&via[B]); 2305 save_via[3] = in_8(&via[DIRB]); 2306 save_via[4] = in_8(&via[PCR]); 2307 save_via[5] = in_8(&via[ACR]); 2308 save_via[6] = in_8(&via[T1CL]); 2309 save_via[7] = in_8(&via[T1CH]); 2310 } 2311 static void 2312 restore_via_state(void) 2313 { 2314 out_8(&via[ANH], save_via[0]); 2315 out_8(&via[DIRA], save_via[1]); 2316 out_8(&via[B], save_via[2]); 2317 out_8(&via[DIRB], save_via[3]); 2318 out_8(&via[PCR], save_via[4]); 2319 out_8(&via[ACR], save_via[5]); 2320 out_8(&via[T1CL], save_via[6]); 2321 out_8(&via[T1CH], save_via[7]); 2322 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 2323 out_8(&via[IFR], 0x7f); /* clear IFR */ 2324 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 2325 } 2326 2327 static int 2328 pmac_suspend_devices(void) 2329 { 2330 int ret; 2331 2332 pm_prepare_console(); 2333 2334 /* Notify old-style device drivers & userland */ 2335 ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT); 2336 if (ret != PBOOK_SLEEP_OK) { 2337 printk(KERN_ERR "Sleep rejected by drivers\n"); 2338 return -EBUSY; 2339 } 2340 2341 /* Sync the disks. */ 2342 /* XXX It would be nice to have some way to ensure that 2343 * nobody is dirtying any new buffers while we wait. That 2344 * could be achieved using the refrigerator for processes 2345 * that swsusp uses 2346 */ 2347 sys_sync(); 2348 2349 /* Sleep can fail now. May not be very robust but useful for debugging */ 2350 ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE); 2351 if (ret != PBOOK_SLEEP_OK) { 2352 printk(KERN_ERR "Driver sleep failed\n"); 2353 return -EBUSY; 2354 } 2355 2356 /* Send suspend call to devices, hold the device core's dpm_sem */ 2357 ret = device_suspend(PMSG_SUSPEND); 2358 if (ret) { 2359 broadcast_wake(); 2360 printk(KERN_ERR "Driver sleep failed\n"); 2361 return -EBUSY; 2362 } 2363 2364 /* Disable clock spreading on some machines */ 2365 pmac_tweak_clock_spreading(0); 2366 2367 /* Stop preemption */ 2368 preempt_disable(); 2369 2370 /* Make sure the decrementer won't interrupt us */ 2371 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 2372 /* Make sure any pending DEC interrupt occurring while we did 2373 * the above didn't re-enable the DEC */ 2374 mb(); 2375 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 2376 2377 /* We can now disable MSR_EE. This code of course works properly only 2378 * on UP machines... For SMP, if we ever implement sleep, we'll have to 2379 * stop the "other" CPUs way before we do all that stuff. 2380 */ 2381 local_irq_disable(); 2382 2383 /* Broadcast power down irq 2384 * This isn't that useful in most cases (only directly wired devices can 2385 * use this but still... This will take care of sysdev's as well, so 2386 * we exit from here with local irqs disabled and PIC off. 2387 */ 2388 ret = device_power_down(PMSG_SUSPEND); 2389 if (ret) { 2390 wakeup_decrementer(); 2391 local_irq_enable(); 2392 preempt_enable(); 2393 device_resume(); 2394 broadcast_wake(); 2395 printk(KERN_ERR "Driver powerdown failed\n"); 2396 return -EBUSY; 2397 } 2398 2399 /* Wait for completion of async backlight requests */ 2400 while (!bright_req_1.complete || !bright_req_2.complete || 2401 !batt_req.complete) 2402 pmu_poll(); 2403 2404 /* Giveup the lazy FPU & vec so we don't have to back them 2405 * up from the low level code 2406 */ 2407 enable_kernel_fp(); 2408 2409 #ifdef CONFIG_ALTIVEC 2410 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 2411 enable_kernel_altivec(); 2412 #endif /* CONFIG_ALTIVEC */ 2413 2414 return 0; 2415 } 2416 2417 static int 2418 pmac_wakeup_devices(void) 2419 { 2420 mdelay(100); 2421 2422 /* Power back up system devices (including the PIC) */ 2423 device_power_up(); 2424 2425 /* Force a poll of ADB interrupts */ 2426 adb_int_pending = 1; 2427 via_pmu_interrupt(0, NULL, NULL); 2428 2429 /* Restart jiffies & scheduling */ 2430 wakeup_decrementer(); 2431 2432 /* Re-enable local CPU interrupts */ 2433 local_irq_enable(); 2434 mdelay(10); 2435 preempt_enable(); 2436 2437 /* Re-enable clock spreading on some machines */ 2438 pmac_tweak_clock_spreading(1); 2439 2440 /* Resume devices */ 2441 device_resume(); 2442 2443 /* Notify old style drivers */ 2444 broadcast_wake(); 2445 2446 pm_restore_console(); 2447 2448 return 0; 2449 } 2450 2451 #define GRACKLE_PM (1<<7) 2452 #define GRACKLE_DOZE (1<<5) 2453 #define GRACKLE_NAP (1<<4) 2454 #define GRACKLE_SLEEP (1<<3) 2455 2456 int 2457 powerbook_sleep_grackle(void) 2458 { 2459 unsigned long save_l2cr; 2460 unsigned short pmcr1; 2461 struct adb_request req; 2462 int ret; 2463 struct pci_dev *grackle; 2464 2465 grackle = pci_find_slot(0, 0); 2466 if (!grackle) 2467 return -ENODEV; 2468 2469 ret = pmac_suspend_devices(); 2470 if (ret) { 2471 printk(KERN_ERR "Sleep rejected by devices\n"); 2472 return ret; 2473 } 2474 2475 /* Turn off various things. Darwin does some retry tests here... */ 2476 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE); 2477 pmu_wait_complete(&req); 2478 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 2479 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY); 2480 pmu_wait_complete(&req); 2481 2482 /* For 750, save backside cache setting and disable it */ 2483 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 2484 2485 if (!__fake_sleep) { 2486 /* Ask the PMU to put us to sleep */ 2487 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2488 pmu_wait_complete(&req); 2489 } 2490 2491 /* The VIA is supposed not to be restored correctly*/ 2492 save_via_state(); 2493 /* We shut down some HW */ 2494 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 2495 2496 pci_read_config_word(grackle, 0x70, &pmcr1); 2497 /* Apparently, MacOS uses NAP mode for Grackle ??? */ 2498 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 2499 pmcr1 |= GRACKLE_PM|GRACKLE_NAP; 2500 pci_write_config_word(grackle, 0x70, pmcr1); 2501 2502 /* Call low-level ASM sleep handler */ 2503 if (__fake_sleep) 2504 mdelay(5000); 2505 else 2506 low_sleep_handler(); 2507 2508 /* We're awake again, stop grackle PM */ 2509 pci_read_config_word(grackle, 0x70, &pmcr1); 2510 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 2511 pci_write_config_word(grackle, 0x70, pmcr1); 2512 2513 /* Make sure the PMU is idle */ 2514 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 2515 restore_via_state(); 2516 2517 /* Restore L2 cache */ 2518 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2519 _set_L2CR(save_l2cr); 2520 2521 /* Restore userland MMU context */ 2522 set_context(current->active_mm->context, current->active_mm->pgd); 2523 2524 /* Power things up */ 2525 pmu_unlock(); 2526 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2527 pmu_wait_complete(&req); 2528 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, 2529 PMU_POW0_ON|PMU_POW0_HARD_DRIVE); 2530 pmu_wait_complete(&req); 2531 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 2532 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY); 2533 pmu_wait_complete(&req); 2534 2535 pmac_wakeup_devices(); 2536 2537 return 0; 2538 } 2539 2540 static int 2541 powerbook_sleep_Core99(void) 2542 { 2543 unsigned long save_l2cr; 2544 unsigned long save_l3cr; 2545 struct adb_request req; 2546 int ret; 2547 2548 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) { 2549 printk(KERN_ERR "Sleep mode not supported on this machine\n"); 2550 return -ENOSYS; 2551 } 2552 2553 if (num_online_cpus() > 1 || cpu_is_offline(0)) 2554 return -EAGAIN; 2555 2556 ret = pmac_suspend_devices(); 2557 if (ret) { 2558 printk(KERN_ERR "Sleep rejected by devices\n"); 2559 return ret; 2560 } 2561 2562 /* Stop environment and ADB interrupts */ 2563 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 2564 pmu_wait_complete(&req); 2565 2566 /* Tell PMU what events will wake us up */ 2567 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS, 2568 0xff, 0xff); 2569 pmu_wait_complete(&req); 2570 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS, 2571 0, PMU_PWR_WAKEUP_KEY | 2572 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0)); 2573 pmu_wait_complete(&req); 2574 2575 /* Save the state of the L2 and L3 caches */ 2576 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */ 2577 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 2578 2579 if (!__fake_sleep) { 2580 /* Ask the PMU to put us to sleep */ 2581 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2582 pmu_wait_complete(&req); 2583 } 2584 2585 /* The VIA is supposed not to be restored correctly*/ 2586 save_via_state(); 2587 2588 /* Shut down various ASICs. There's a chance that we can no longer 2589 * talk to the PMU after this, so I moved it to _after_ sending the 2590 * sleep command to it. Still need to be checked. 2591 */ 2592 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 2593 2594 /* Call low-level ASM sleep handler */ 2595 if (__fake_sleep) 2596 mdelay(5000); 2597 else 2598 low_sleep_handler(); 2599 2600 /* Restore Apple core ASICs state */ 2601 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 2602 2603 /* Restore VIA */ 2604 restore_via_state(); 2605 2606 /* tweak LPJ before cpufreq is there */ 2607 loops_per_jiffy *= 2; 2608 2609 /* Restore video */ 2610 pmac_call_early_video_resume(); 2611 2612 /* Restore L2 cache */ 2613 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2614 _set_L2CR(save_l2cr); 2615 /* Restore L3 cache */ 2616 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0) 2617 _set_L3CR(save_l3cr); 2618 2619 /* Restore userland MMU context */ 2620 set_context(current->active_mm->context, current->active_mm->pgd); 2621 2622 /* Tell PMU we are ready */ 2623 pmu_unlock(); 2624 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2625 pmu_wait_complete(&req); 2626 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2627 pmu_wait_complete(&req); 2628 2629 /* Restore LPJ, cpufreq will adjust the cpu frequency */ 2630 loops_per_jiffy /= 2; 2631 2632 pmac_wakeup_devices(); 2633 2634 return 0; 2635 } 2636 2637 #define PB3400_MEM_CTRL 0xf8000000 2638 #define PB3400_MEM_CTRL_SLEEP 0x70 2639 2640 static int 2641 powerbook_sleep_3400(void) 2642 { 2643 int ret, i, x; 2644 unsigned int hid0; 2645 unsigned long p; 2646 struct adb_request sleep_req; 2647 void __iomem *mem_ctrl; 2648 unsigned int __iomem *mem_ctrl_sleep; 2649 2650 /* first map in the memory controller registers */ 2651 mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100); 2652 if (mem_ctrl == NULL) { 2653 printk("powerbook_sleep_3400: ioremap failed\n"); 2654 return -ENOMEM; 2655 } 2656 mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP; 2657 2658 /* Allocate room for PCI save */ 2659 pbook_alloc_pci_save(); 2660 2661 ret = pmac_suspend_devices(); 2662 if (ret) { 2663 pbook_free_pci_save(); 2664 printk(KERN_ERR "Sleep rejected by devices\n"); 2665 return ret; 2666 } 2667 2668 /* Save the state of PCI config space for some slots */ 2669 pbook_pci_save(); 2670 2671 /* Set the memory controller to keep the memory refreshed 2672 while we're asleep */ 2673 for (i = 0x403f; i >= 0x4000; --i) { 2674 out_be32(mem_ctrl_sleep, i); 2675 do { 2676 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff; 2677 } while (x == 0); 2678 if (x >= 0x100) 2679 break; 2680 } 2681 2682 /* Ask the PMU to put us to sleep */ 2683 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2684 while (!sleep_req.complete) 2685 mb(); 2686 2687 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 2688 2689 /* displacement-flush the L2 cache - necessary? */ 2690 for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000) 2691 i = *(volatile int *)p; 2692 asleep = 1; 2693 2694 /* Put the CPU into sleep mode */ 2695 hid0 = mfspr(SPRN_HID0); 2696 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP; 2697 mtspr(SPRN_HID0, hid0); 2698 mtmsr(mfmsr() | MSR_POW | MSR_EE); 2699 udelay(10); 2700 2701 /* OK, we're awake again, start restoring things */ 2702 out_be32(mem_ctrl_sleep, 0x3f); 2703 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 2704 pbook_pci_restore(); 2705 pmu_unlock(); 2706 2707 /* wait for the PMU interrupt sequence to complete */ 2708 while (asleep) 2709 mb(); 2710 2711 pmac_wakeup_devices(); 2712 pbook_free_pci_save(); 2713 iounmap(mem_ctrl); 2714 2715 return 0; 2716 } 2717 2718 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2719 2720 /* 2721 * Support for /dev/pmu device 2722 */ 2723 #define RB_SIZE 0x10 2724 struct pmu_private { 2725 struct list_head list; 2726 int rb_get; 2727 int rb_put; 2728 struct rb_entry { 2729 unsigned short len; 2730 unsigned char data[16]; 2731 } rb_buf[RB_SIZE]; 2732 wait_queue_head_t wait; 2733 spinlock_t lock; 2734 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2735 int backlight_locker; 2736 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 2737 }; 2738 2739 static LIST_HEAD(all_pmu_pvt); 2740 static DEFINE_SPINLOCK(all_pvt_lock); 2741 2742 static void 2743 pmu_pass_intr(unsigned char *data, int len) 2744 { 2745 struct pmu_private *pp; 2746 struct list_head *list; 2747 int i; 2748 unsigned long flags; 2749 2750 if (len > sizeof(pp->rb_buf[0].data)) 2751 len = sizeof(pp->rb_buf[0].data); 2752 spin_lock_irqsave(&all_pvt_lock, flags); 2753 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) { 2754 pp = list_entry(list, struct pmu_private, list); 2755 spin_lock(&pp->lock); 2756 i = pp->rb_put + 1; 2757 if (i >= RB_SIZE) 2758 i = 0; 2759 if (i != pp->rb_get) { 2760 struct rb_entry *rp = &pp->rb_buf[pp->rb_put]; 2761 rp->len = len; 2762 memcpy(rp->data, data, len); 2763 pp->rb_put = i; 2764 wake_up_interruptible(&pp->wait); 2765 } 2766 spin_unlock(&pp->lock); 2767 } 2768 spin_unlock_irqrestore(&all_pvt_lock, flags); 2769 } 2770 2771 static int 2772 pmu_open(struct inode *inode, struct file *file) 2773 { 2774 struct pmu_private *pp; 2775 unsigned long flags; 2776 2777 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL); 2778 if (pp == 0) 2779 return -ENOMEM; 2780 pp->rb_get = pp->rb_put = 0; 2781 spin_lock_init(&pp->lock); 2782 init_waitqueue_head(&pp->wait); 2783 spin_lock_irqsave(&all_pvt_lock, flags); 2784 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2785 pp->backlight_locker = 0; 2786 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 2787 list_add(&pp->list, &all_pmu_pvt); 2788 spin_unlock_irqrestore(&all_pvt_lock, flags); 2789 file->private_data = pp; 2790 return 0; 2791 } 2792 2793 static ssize_t 2794 pmu_read(struct file *file, char __user *buf, 2795 size_t count, loff_t *ppos) 2796 { 2797 struct pmu_private *pp = file->private_data; 2798 DECLARE_WAITQUEUE(wait, current); 2799 unsigned long flags; 2800 int ret = 0; 2801 2802 if (count < 1 || pp == 0) 2803 return -EINVAL; 2804 if (!access_ok(VERIFY_WRITE, buf, count)) 2805 return -EFAULT; 2806 2807 spin_lock_irqsave(&pp->lock, flags); 2808 add_wait_queue(&pp->wait, &wait); 2809 current->state = TASK_INTERRUPTIBLE; 2810 2811 for (;;) { 2812 ret = -EAGAIN; 2813 if (pp->rb_get != pp->rb_put) { 2814 int i = pp->rb_get; 2815 struct rb_entry *rp = &pp->rb_buf[i]; 2816 ret = rp->len; 2817 spin_unlock_irqrestore(&pp->lock, flags); 2818 if (ret > count) 2819 ret = count; 2820 if (ret > 0 && copy_to_user(buf, rp->data, ret)) 2821 ret = -EFAULT; 2822 if (++i >= RB_SIZE) 2823 i = 0; 2824 spin_lock_irqsave(&pp->lock, flags); 2825 pp->rb_get = i; 2826 } 2827 if (ret >= 0) 2828 break; 2829 if (file->f_flags & O_NONBLOCK) 2830 break; 2831 ret = -ERESTARTSYS; 2832 if (signal_pending(current)) 2833 break; 2834 spin_unlock_irqrestore(&pp->lock, flags); 2835 schedule(); 2836 spin_lock_irqsave(&pp->lock, flags); 2837 } 2838 current->state = TASK_RUNNING; 2839 remove_wait_queue(&pp->wait, &wait); 2840 spin_unlock_irqrestore(&pp->lock, flags); 2841 2842 return ret; 2843 } 2844 2845 static ssize_t 2846 pmu_write(struct file *file, const char __user *buf, 2847 size_t count, loff_t *ppos) 2848 { 2849 return 0; 2850 } 2851 2852 static unsigned int 2853 pmu_fpoll(struct file *filp, poll_table *wait) 2854 { 2855 struct pmu_private *pp = filp->private_data; 2856 unsigned int mask = 0; 2857 unsigned long flags; 2858 2859 if (pp == 0) 2860 return 0; 2861 poll_wait(filp, &pp->wait, wait); 2862 spin_lock_irqsave(&pp->lock, flags); 2863 if (pp->rb_get != pp->rb_put) 2864 mask |= POLLIN; 2865 spin_unlock_irqrestore(&pp->lock, flags); 2866 return mask; 2867 } 2868 2869 static int 2870 pmu_release(struct inode *inode, struct file *file) 2871 { 2872 struct pmu_private *pp = file->private_data; 2873 unsigned long flags; 2874 2875 lock_kernel(); 2876 if (pp != 0) { 2877 file->private_data = NULL; 2878 spin_lock_irqsave(&all_pvt_lock, flags); 2879 list_del(&pp->list); 2880 spin_unlock_irqrestore(&all_pvt_lock, flags); 2881 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2882 if (pp->backlight_locker) { 2883 spin_lock_irqsave(&pmu_lock, flags); 2884 disable_kernel_backlight--; 2885 spin_unlock_irqrestore(&pmu_lock, flags); 2886 } 2887 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 2888 kfree(pp); 2889 } 2890 unlock_kernel(); 2891 return 0; 2892 } 2893 2894 static int 2895 pmu_ioctl(struct inode * inode, struct file *filp, 2896 u_int cmd, u_long arg) 2897 { 2898 __u32 __user *argp = (__u32 __user *)arg; 2899 int error = -EINVAL; 2900 2901 switch (cmd) { 2902 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2903 case PMU_IOC_SLEEP: 2904 if (!capable(CAP_SYS_ADMIN)) 2905 return -EACCES; 2906 if (sleep_in_progress) 2907 return -EBUSY; 2908 sleep_in_progress = 1; 2909 switch (pmu_kind) { 2910 case PMU_OHARE_BASED: 2911 error = powerbook_sleep_3400(); 2912 break; 2913 case PMU_HEATHROW_BASED: 2914 case PMU_PADDINGTON_BASED: 2915 error = powerbook_sleep_grackle(); 2916 break; 2917 case PMU_KEYLARGO_BASED: 2918 error = powerbook_sleep_Core99(); 2919 break; 2920 default: 2921 error = -ENOSYS; 2922 } 2923 sleep_in_progress = 0; 2924 break; 2925 case PMU_IOC_CAN_SLEEP: 2926 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) 2927 return put_user(0, argp); 2928 else 2929 return put_user(1, argp); 2930 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2931 2932 #ifdef CONFIG_PMAC_BACKLIGHT 2933 /* Backlight should have its own device or go via 2934 * the fbdev 2935 */ 2936 case PMU_IOC_GET_BACKLIGHT: 2937 if (sleep_in_progress) 2938 return -EBUSY; 2939 error = get_backlight_level(); 2940 if (error < 0) 2941 return error; 2942 return put_user(error, argp); 2943 case PMU_IOC_SET_BACKLIGHT: 2944 { 2945 __u32 value; 2946 if (sleep_in_progress) 2947 return -EBUSY; 2948 error = get_user(value, argp); 2949 if (!error) 2950 error = set_backlight_level(value); 2951 break; 2952 } 2953 #ifdef CONFIG_INPUT_ADBHID 2954 case PMU_IOC_GRAB_BACKLIGHT: { 2955 struct pmu_private *pp = filp->private_data; 2956 unsigned long flags; 2957 2958 if (pp->backlight_locker) 2959 return 0; 2960 pp->backlight_locker = 1; 2961 spin_lock_irqsave(&pmu_lock, flags); 2962 disable_kernel_backlight++; 2963 spin_unlock_irqrestore(&pmu_lock, flags); 2964 return 0; 2965 } 2966 #endif /* CONFIG_INPUT_ADBHID */ 2967 #endif /* CONFIG_PMAC_BACKLIGHT */ 2968 case PMU_IOC_GET_MODEL: 2969 return put_user(pmu_kind, argp); 2970 case PMU_IOC_HAS_ADB: 2971 return put_user(pmu_has_adb, argp); 2972 } 2973 return error; 2974 } 2975 2976 static struct file_operations pmu_device_fops = { 2977 .read = pmu_read, 2978 .write = pmu_write, 2979 .poll = pmu_fpoll, 2980 .ioctl = pmu_ioctl, 2981 .open = pmu_open, 2982 .release = pmu_release, 2983 }; 2984 2985 static struct miscdevice pmu_device = { 2986 PMU_MINOR, "pmu", &pmu_device_fops 2987 }; 2988 2989 static int pmu_device_init(void) 2990 { 2991 if (!via) 2992 return 0; 2993 if (misc_register(&pmu_device) < 0) 2994 printk(KERN_ERR "via-pmu: cannot register misc device.\n"); 2995 return 0; 2996 } 2997 device_initcall(pmu_device_init); 2998 2999 3000 #ifdef DEBUG_SLEEP 3001 static inline void 3002 polled_handshake(volatile unsigned char __iomem *via) 3003 { 3004 via[B] &= ~TREQ; eieio(); 3005 while ((via[B] & TACK) != 0) 3006 ; 3007 via[B] |= TREQ; eieio(); 3008 while ((via[B] & TACK) == 0) 3009 ; 3010 } 3011 3012 static inline void 3013 polled_send_byte(volatile unsigned char __iomem *via, int x) 3014 { 3015 via[ACR] |= SR_OUT | SR_EXT; eieio(); 3016 via[SR] = x; eieio(); 3017 polled_handshake(via); 3018 } 3019 3020 static inline int 3021 polled_recv_byte(volatile unsigned char __iomem *via) 3022 { 3023 int x; 3024 3025 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio(); 3026 x = via[SR]; eieio(); 3027 polled_handshake(via); 3028 x = via[SR]; eieio(); 3029 return x; 3030 } 3031 3032 int 3033 pmu_polled_request(struct adb_request *req) 3034 { 3035 unsigned long flags; 3036 int i, l, c; 3037 volatile unsigned char __iomem *v = via; 3038 3039 req->complete = 1; 3040 c = req->data[0]; 3041 l = pmu_data_len[c][0]; 3042 if (l >= 0 && req->nbytes != l + 1) 3043 return -EINVAL; 3044 3045 local_irq_save(flags); 3046 while (pmu_state != idle) 3047 pmu_poll(); 3048 3049 while ((via[B] & TACK) == 0) 3050 ; 3051 polled_send_byte(v, c); 3052 if (l < 0) { 3053 l = req->nbytes - 1; 3054 polled_send_byte(v, l); 3055 } 3056 for (i = 1; i <= l; ++i) 3057 polled_send_byte(v, req->data[i]); 3058 3059 l = pmu_data_len[c][1]; 3060 if (l < 0) 3061 l = polled_recv_byte(v); 3062 for (i = 0; i < l; ++i) 3063 req->reply[i + req->reply_len] = polled_recv_byte(v); 3064 3065 if (req->done) 3066 (*req->done)(req); 3067 3068 local_irq_restore(flags); 3069 return 0; 3070 } 3071 #endif /* DEBUG_SLEEP */ 3072 3073 3074 /* FIXME: This is a temporary set of callbacks to enable us 3075 * to do suspend-to-disk. 3076 */ 3077 3078 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 3079 3080 static int pmu_sys_suspended = 0; 3081 3082 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state) 3083 { 3084 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended) 3085 return 0; 3086 3087 /* Suspend PMU event interrupts */ 3088 pmu_suspend(); 3089 3090 pmu_sys_suspended = 1; 3091 return 0; 3092 } 3093 3094 static int pmu_sys_resume(struct sys_device *sysdev) 3095 { 3096 struct adb_request req; 3097 3098 if (!pmu_sys_suspended) 3099 return 0; 3100 3101 /* Tell PMU we are ready */ 3102 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 3103 pmu_wait_complete(&req); 3104 3105 /* Resume PMU event interrupts */ 3106 pmu_resume(); 3107 3108 pmu_sys_suspended = 0; 3109 3110 return 0; 3111 } 3112 3113 #endif /* CONFIG_PM && CONFIG_PPC32 */ 3114 3115 static struct sysdev_class pmu_sysclass = { 3116 set_kset_name("pmu"), 3117 }; 3118 3119 static struct sys_device device_pmu = { 3120 .id = 0, 3121 .cls = &pmu_sysclass, 3122 }; 3123 3124 static struct sysdev_driver driver_pmu = { 3125 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 3126 .suspend = &pmu_sys_suspend, 3127 .resume = &pmu_sys_resume, 3128 #endif /* CONFIG_PM && CONFIG_PPC32 */ 3129 }; 3130 3131 static int __init init_pmu_sysfs(void) 3132 { 3133 int rc; 3134 3135 rc = sysdev_class_register(&pmu_sysclass); 3136 if (rc) { 3137 printk(KERN_ERR "Failed registering PMU sys class\n"); 3138 return -ENODEV; 3139 } 3140 rc = sysdev_register(&device_pmu); 3141 if (rc) { 3142 printk(KERN_ERR "Failed registering PMU sys device\n"); 3143 return -ENODEV; 3144 } 3145 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu); 3146 if (rc) { 3147 printk(KERN_ERR "Failed registering PMU sys driver\n"); 3148 return -ENODEV; 3149 } 3150 return 0; 3151 } 3152 3153 subsys_initcall(init_pmu_sysfs); 3154 3155 EXPORT_SYMBOL(pmu_request); 3156 EXPORT_SYMBOL(pmu_poll); 3157 EXPORT_SYMBOL(pmu_poll_adb); 3158 EXPORT_SYMBOL(pmu_wait_complete); 3159 EXPORT_SYMBOL(pmu_suspend); 3160 EXPORT_SYMBOL(pmu_resume); 3161 EXPORT_SYMBOL(pmu_unlock); 3162 EXPORT_SYMBOL(pmu_i2c_combined_read); 3163 EXPORT_SYMBOL(pmu_i2c_stdsub_write); 3164 EXPORT_SYMBOL(pmu_i2c_simple_read); 3165 EXPORT_SYMBOL(pmu_i2c_simple_write); 3166 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 3167 EXPORT_SYMBOL(pmu_enable_irled); 3168 EXPORT_SYMBOL(pmu_battery_count); 3169 EXPORT_SYMBOL(pmu_batteries); 3170 EXPORT_SYMBOL(pmu_power_flags); 3171 #endif /* CONFIG_PM && CONFIG_PPC32 */ 3172 3173