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 u64 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 == OF_BAD_ADDR) { 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 u64 gaddr = OF_BAD_ADDR; 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 != OF_BAD_ADDR) 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 v%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 #ifdef CONFIG_PMAC_BACKLIGHT 483 /* Enable backlight */ 484 register_backlight_controller(&pmu_backlight_controller, NULL, "pmu"); 485 #endif /* CONFIG_PMAC_BACKLIGHT */ 486 487 #ifdef CONFIG_PPC32 488 if (machine_is_compatible("AAPL,3400/2400") || 489 machine_is_compatible("AAPL,3500")) { 490 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 491 NULL, PMAC_MB_INFO_MODEL, 0); 492 pmu_battery_count = 1; 493 if (mb == PMAC_TYPE_COMET) 494 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET; 495 else 496 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER; 497 } else if (machine_is_compatible("AAPL,PowerBook1998") || 498 machine_is_compatible("PowerBook1,1")) { 499 pmu_battery_count = 2; 500 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 501 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 502 } else { 503 struct device_node* prim = find_devices("power-mgt"); 504 u32 *prim_info = NULL; 505 if (prim) 506 prim_info = (u32 *)get_property(prim, "prim-info", NULL); 507 if (prim_info) { 508 /* Other stuffs here yet unknown */ 509 pmu_battery_count = (prim_info[6] >> 16) & 0xff; 510 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; 511 if (pmu_battery_count > 1) 512 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; 513 } 514 } 515 #endif /* CONFIG_PPC32 */ 516 517 /* Create /proc/pmu */ 518 proc_pmu_root = proc_mkdir("pmu", NULL); 519 if (proc_pmu_root) { 520 long i; 521 522 for (i=0; i<pmu_battery_count; i++) { 523 char title[16]; 524 sprintf(title, "battery_%ld", i); 525 proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root, 526 proc_get_batt, (void *)i); 527 } 528 529 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root, 530 proc_get_info, NULL); 531 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root, 532 proc_get_irqstats, NULL); 533 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root); 534 if (proc_pmu_options) { 535 proc_pmu_options->nlink = 1; 536 proc_pmu_options->read_proc = proc_read_options; 537 proc_pmu_options->write_proc = proc_write_options; 538 } 539 } 540 return 0; 541 } 542 543 device_initcall(via_pmu_dev_init); 544 545 static int 546 init_pmu(void) 547 { 548 int timeout; 549 struct adb_request req; 550 551 out_8(&via[B], via[B] | TREQ); /* negate TREQ */ 552 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */ 553 554 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 555 timeout = 100000; 556 while (!req.complete) { 557 if (--timeout < 0) { 558 printk(KERN_ERR "init_pmu: no response from PMU\n"); 559 return 0; 560 } 561 udelay(10); 562 pmu_poll(); 563 } 564 565 /* ack all pending interrupts */ 566 timeout = 100000; 567 interrupt_data[0][0] = 1; 568 while (interrupt_data[0][0] || pmu_state != idle) { 569 if (--timeout < 0) { 570 printk(KERN_ERR "init_pmu: timed out acking intrs\n"); 571 return 0; 572 } 573 if (pmu_state == idle) 574 adb_int_pending = 1; 575 via_pmu_interrupt(0, NULL, NULL); 576 udelay(10); 577 } 578 579 /* Tell PMU we are ready. */ 580 if (pmu_kind == PMU_KEYLARGO_BASED) { 581 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 582 while (!req.complete) 583 pmu_poll(); 584 } 585 586 /* Read PMU version */ 587 pmu_request(&req, NULL, 1, PMU_GET_VERSION); 588 pmu_wait_complete(&req); 589 if (req.reply_len > 0) 590 pmu_version = req.reply[0]; 591 592 /* Read server mode setting */ 593 if (pmu_kind == PMU_KEYLARGO_BASED) { 594 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, 595 PMU_PWR_GET_POWERUP_EVENTS); 596 pmu_wait_complete(&req); 597 if (req.reply_len == 2) { 598 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT) 599 option_server_mode = 1; 600 printk(KERN_INFO "via-pmu: Server Mode is %s\n", 601 option_server_mode ? "enabled" : "disabled"); 602 } 603 } 604 return 1; 605 } 606 607 int 608 pmu_get_model(void) 609 { 610 return pmu_kind; 611 } 612 613 static void pmu_set_server_mode(int server_mode) 614 { 615 struct adb_request req; 616 617 if (pmu_kind != PMU_KEYLARGO_BASED) 618 return; 619 620 option_server_mode = server_mode; 621 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS); 622 pmu_wait_complete(&req); 623 if (req.reply_len < 2) 624 return; 625 if (server_mode) 626 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 627 PMU_PWR_SET_POWERUP_EVENTS, 628 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 629 else 630 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, 631 PMU_PWR_CLR_POWERUP_EVENTS, 632 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 633 pmu_wait_complete(&req); 634 } 635 636 /* This new version of the code for 2400/3400/3500 powerbooks 637 * is inspired from the implementation in gkrellm-pmu 638 */ 639 static void 640 done_battery_state_ohare(struct adb_request* req) 641 { 642 /* format: 643 * [0] : flags 644 * 0x01 : AC indicator 645 * 0x02 : charging 646 * 0x04 : battery exist 647 * 0x08 : 648 * 0x10 : 649 * 0x20 : full charged 650 * 0x40 : pcharge reset 651 * 0x80 : battery exist 652 * 653 * [1][2] : battery voltage 654 * [3] : CPU temperature 655 * [4] : battery temperature 656 * [5] : current 657 * [6][7] : pcharge 658 * --tkoba 659 */ 660 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER; 661 long pcharge, charge, vb, vmax, lmax; 662 long vmax_charging, vmax_charged; 663 long amperage, voltage, time, max; 664 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, 665 NULL, PMAC_MB_INFO_MODEL, 0); 666 667 if (req->reply[0] & 0x01) 668 pmu_power_flags |= PMU_PWR_AC_PRESENT; 669 else 670 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 671 672 if (mb == PMAC_TYPE_COMET) { 673 vmax_charged = 189; 674 vmax_charging = 213; 675 lmax = 6500; 676 } else { 677 vmax_charged = 330; 678 vmax_charging = 330; 679 lmax = 6500; 680 } 681 vmax = vmax_charged; 682 683 /* If battery installed */ 684 if (req->reply[0] & 0x04) { 685 bat_flags |= PMU_BATT_PRESENT; 686 if (req->reply[0] & 0x02) 687 bat_flags |= PMU_BATT_CHARGING; 688 vb = (req->reply[1] << 8) | req->reply[2]; 689 voltage = (vb * 265 + 72665) / 10; 690 amperage = req->reply[5]; 691 if ((req->reply[0] & 0x01) == 0) { 692 if (amperage > 200) 693 vb += ((amperage - 200) * 15)/100; 694 } else if (req->reply[0] & 0x02) { 695 vb = (vb * 97) / 100; 696 vmax = vmax_charging; 697 } 698 charge = (100 * vb) / vmax; 699 if (req->reply[0] & 0x40) { 700 pcharge = (req->reply[6] << 8) + req->reply[7]; 701 if (pcharge > lmax) 702 pcharge = lmax; 703 pcharge *= 100; 704 pcharge = 100 - pcharge / lmax; 705 if (pcharge < charge) 706 charge = pcharge; 707 } 708 if (amperage > 0) 709 time = (charge * 16440) / amperage; 710 else 711 time = 0; 712 max = 100; 713 amperage = -amperage; 714 } else 715 charge = max = amperage = voltage = time = 0; 716 717 pmu_batteries[pmu_cur_battery].flags = bat_flags; 718 pmu_batteries[pmu_cur_battery].charge = charge; 719 pmu_batteries[pmu_cur_battery].max_charge = max; 720 pmu_batteries[pmu_cur_battery].amperage = amperage; 721 pmu_batteries[pmu_cur_battery].voltage = voltage; 722 pmu_batteries[pmu_cur_battery].time_remaining = time; 723 724 clear_bit(0, &async_req_locks); 725 } 726 727 static void 728 done_battery_state_smart(struct adb_request* req) 729 { 730 /* format: 731 * [0] : format of this structure (known: 3,4,5) 732 * [1] : flags 733 * 734 * format 3 & 4: 735 * 736 * [2] : charge 737 * [3] : max charge 738 * [4] : current 739 * [5] : voltage 740 * 741 * format 5: 742 * 743 * [2][3] : charge 744 * [4][5] : max charge 745 * [6][7] : current 746 * [8][9] : voltage 747 */ 748 749 unsigned int bat_flags = PMU_BATT_TYPE_SMART; 750 int amperage; 751 unsigned int capa, max, voltage; 752 753 if (req->reply[1] & 0x01) 754 pmu_power_flags |= PMU_PWR_AC_PRESENT; 755 else 756 pmu_power_flags &= ~PMU_PWR_AC_PRESENT; 757 758 759 capa = max = amperage = voltage = 0; 760 761 if (req->reply[1] & 0x04) { 762 bat_flags |= PMU_BATT_PRESENT; 763 switch(req->reply[0]) { 764 case 3: 765 case 4: capa = req->reply[2]; 766 max = req->reply[3]; 767 amperage = *((signed char *)&req->reply[4]); 768 voltage = req->reply[5]; 769 break; 770 case 5: capa = (req->reply[2] << 8) | req->reply[3]; 771 max = (req->reply[4] << 8) | req->reply[5]; 772 amperage = *((signed short *)&req->reply[6]); 773 voltage = (req->reply[8] << 8) | req->reply[9]; 774 break; 775 default: 776 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n", 777 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]); 778 break; 779 } 780 } 781 782 if ((req->reply[1] & 0x01) && (amperage > 0)) 783 bat_flags |= PMU_BATT_CHARGING; 784 785 pmu_batteries[pmu_cur_battery].flags = bat_flags; 786 pmu_batteries[pmu_cur_battery].charge = capa; 787 pmu_batteries[pmu_cur_battery].max_charge = max; 788 pmu_batteries[pmu_cur_battery].amperage = amperage; 789 pmu_batteries[pmu_cur_battery].voltage = voltage; 790 if (amperage) { 791 if ((req->reply[1] & 0x01) && (amperage > 0)) 792 pmu_batteries[pmu_cur_battery].time_remaining 793 = ((max-capa) * 3600) / amperage; 794 else 795 pmu_batteries[pmu_cur_battery].time_remaining 796 = (capa * 3600) / (-amperage); 797 } else 798 pmu_batteries[pmu_cur_battery].time_remaining = 0; 799 800 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count; 801 802 clear_bit(0, &async_req_locks); 803 } 804 805 static void 806 query_battery_state(void) 807 { 808 if (test_and_set_bit(0, &async_req_locks)) 809 return; 810 if (pmu_kind == PMU_OHARE_BASED) 811 pmu_request(&batt_req, done_battery_state_ohare, 812 1, PMU_BATTERY_STATE); 813 else 814 pmu_request(&batt_req, done_battery_state_smart, 815 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1); 816 } 817 818 static int 819 proc_get_info(char *page, char **start, off_t off, 820 int count, int *eof, void *data) 821 { 822 char* p = page; 823 824 p += sprintf(p, "PMU driver version : %d\n", PMU_DRIVER_VERSION); 825 p += sprintf(p, "PMU firmware version : %02x\n", pmu_version); 826 p += sprintf(p, "AC Power : %d\n", 827 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0)); 828 p += sprintf(p, "Battery count : %d\n", pmu_battery_count); 829 830 return p - page; 831 } 832 833 static int 834 proc_get_irqstats(char *page, char **start, off_t off, 835 int count, int *eof, void *data) 836 { 837 int i; 838 char* p = page; 839 static const char *irq_names[] = { 840 "Total CB1 triggered events", 841 "Total GPIO1 triggered events", 842 "PC-Card eject button", 843 "Sound/Brightness button", 844 "ADB message", 845 "Battery state change", 846 "Environment interrupt", 847 "Tick timer", 848 "Ghost interrupt (zero len)", 849 "Empty interrupt (empty mask)", 850 "Max irqs in a row" 851 }; 852 853 for (i=0; i<11; i++) { 854 p += sprintf(p, " %2u: %10u (%s)\n", 855 i, pmu_irq_stats[i], irq_names[i]); 856 } 857 return p - page; 858 } 859 860 static int 861 proc_get_batt(char *page, char **start, off_t off, 862 int count, int *eof, void *data) 863 { 864 long batnum = (long)data; 865 char *p = page; 866 867 p += sprintf(p, "\n"); 868 p += sprintf(p, "flags : %08x\n", 869 pmu_batteries[batnum].flags); 870 p += sprintf(p, "charge : %d\n", 871 pmu_batteries[batnum].charge); 872 p += sprintf(p, "max_charge : %d\n", 873 pmu_batteries[batnum].max_charge); 874 p += sprintf(p, "current : %d\n", 875 pmu_batteries[batnum].amperage); 876 p += sprintf(p, "voltage : %d\n", 877 pmu_batteries[batnum].voltage); 878 p += sprintf(p, "time rem. : %d\n", 879 pmu_batteries[batnum].time_remaining); 880 881 return p - page; 882 } 883 884 static int 885 proc_read_options(char *page, char **start, off_t off, 886 int count, int *eof, void *data) 887 { 888 char *p = page; 889 890 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 891 if (pmu_kind == PMU_KEYLARGO_BASED && 892 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 893 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup); 894 #endif 895 if (pmu_kind == PMU_KEYLARGO_BASED) 896 p += sprintf(p, "server_mode=%d\n", option_server_mode); 897 898 return p - page; 899 } 900 901 static int 902 proc_write_options(struct file *file, const char __user *buffer, 903 unsigned long count, void *data) 904 { 905 char tmp[33]; 906 char *label, *val; 907 unsigned long fcount = count; 908 909 if (!count) 910 return -EINVAL; 911 if (count > 32) 912 count = 32; 913 if (copy_from_user(tmp, buffer, count)) 914 return -EFAULT; 915 tmp[count] = 0; 916 917 label = tmp; 918 while(*label == ' ') 919 label++; 920 val = label; 921 while(*val && (*val != '=')) { 922 if (*val == ' ') 923 *val = 0; 924 val++; 925 } 926 if ((*val) == 0) 927 return -EINVAL; 928 *(val++) = 0; 929 while(*val == ' ') 930 val++; 931 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 932 if (pmu_kind == PMU_KEYLARGO_BASED && 933 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) 934 if (!strcmp(label, "lid_wakeup")) 935 option_lid_wakeup = ((*val) == '1'); 936 #endif 937 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) { 938 int new_value; 939 new_value = ((*val) == '1'); 940 if (new_value != option_server_mode) 941 pmu_set_server_mode(new_value); 942 } 943 return fcount; 944 } 945 946 #ifdef CONFIG_ADB 947 /* Send an ADB command */ 948 static int 949 pmu_send_request(struct adb_request *req, int sync) 950 { 951 int i, ret; 952 953 if ((vias == NULL) || (!pmu_fully_inited)) { 954 req->complete = 1; 955 return -ENXIO; 956 } 957 958 ret = -EINVAL; 959 960 switch (req->data[0]) { 961 case PMU_PACKET: 962 for (i = 0; i < req->nbytes - 1; ++i) 963 req->data[i] = req->data[i+1]; 964 --req->nbytes; 965 if (pmu_data_len[req->data[0]][1] != 0) { 966 req->reply[0] = ADB_RET_OK; 967 req->reply_len = 1; 968 } else 969 req->reply_len = 0; 970 ret = pmu_queue_request(req); 971 break; 972 case CUDA_PACKET: 973 switch (req->data[1]) { 974 case CUDA_GET_TIME: 975 if (req->nbytes != 2) 976 break; 977 req->data[0] = PMU_READ_RTC; 978 req->nbytes = 1; 979 req->reply_len = 3; 980 req->reply[0] = CUDA_PACKET; 981 req->reply[1] = 0; 982 req->reply[2] = CUDA_GET_TIME; 983 ret = pmu_queue_request(req); 984 break; 985 case CUDA_SET_TIME: 986 if (req->nbytes != 6) 987 break; 988 req->data[0] = PMU_SET_RTC; 989 req->nbytes = 5; 990 for (i = 1; i <= 4; ++i) 991 req->data[i] = req->data[i+1]; 992 req->reply_len = 3; 993 req->reply[0] = CUDA_PACKET; 994 req->reply[1] = 0; 995 req->reply[2] = CUDA_SET_TIME; 996 ret = pmu_queue_request(req); 997 break; 998 } 999 break; 1000 case ADB_PACKET: 1001 if (!pmu_has_adb) 1002 return -ENXIO; 1003 for (i = req->nbytes - 1; i > 1; --i) 1004 req->data[i+2] = req->data[i]; 1005 req->data[3] = req->nbytes - 2; 1006 req->data[2] = pmu_adb_flags; 1007 /*req->data[1] = req->data[1];*/ 1008 req->data[0] = PMU_ADB_CMD; 1009 req->nbytes += 2; 1010 req->reply_expected = 1; 1011 req->reply_len = 0; 1012 ret = pmu_queue_request(req); 1013 break; 1014 } 1015 if (ret) { 1016 req->complete = 1; 1017 return ret; 1018 } 1019 1020 if (sync) 1021 while (!req->complete) 1022 pmu_poll(); 1023 1024 return 0; 1025 } 1026 1027 /* Enable/disable autopolling */ 1028 static int 1029 pmu_adb_autopoll(int devs) 1030 { 1031 struct adb_request req; 1032 1033 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1034 return -ENXIO; 1035 1036 if (devs) { 1037 adb_dev_map = devs; 1038 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86, 1039 adb_dev_map >> 8, adb_dev_map); 1040 pmu_adb_flags = 2; 1041 } else { 1042 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF); 1043 pmu_adb_flags = 0; 1044 } 1045 while (!req.complete) 1046 pmu_poll(); 1047 return 0; 1048 } 1049 1050 /* Reset the ADB bus */ 1051 static int 1052 pmu_adb_reset_bus(void) 1053 { 1054 struct adb_request req; 1055 int save_autopoll = adb_dev_map; 1056 1057 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) 1058 return -ENXIO; 1059 1060 /* anyone got a better idea?? */ 1061 pmu_adb_autopoll(0); 1062 1063 req.nbytes = 5; 1064 req.done = NULL; 1065 req.data[0] = PMU_ADB_CMD; 1066 req.data[1] = 0; 1067 req.data[2] = ADB_BUSRESET; 1068 req.data[3] = 0; 1069 req.data[4] = 0; 1070 req.reply_len = 0; 1071 req.reply_expected = 1; 1072 if (pmu_queue_request(&req) != 0) { 1073 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n"); 1074 return -EIO; 1075 } 1076 pmu_wait_complete(&req); 1077 1078 if (save_autopoll != 0) 1079 pmu_adb_autopoll(save_autopoll); 1080 1081 return 0; 1082 } 1083 #endif /* CONFIG_ADB */ 1084 1085 /* Construct and send a pmu request */ 1086 int 1087 pmu_request(struct adb_request *req, void (*done)(struct adb_request *), 1088 int nbytes, ...) 1089 { 1090 va_list list; 1091 int i; 1092 1093 if (vias == NULL) 1094 return -ENXIO; 1095 1096 if (nbytes < 0 || nbytes > 32) { 1097 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes); 1098 req->complete = 1; 1099 return -EINVAL; 1100 } 1101 req->nbytes = nbytes; 1102 req->done = done; 1103 va_start(list, nbytes); 1104 for (i = 0; i < nbytes; ++i) 1105 req->data[i] = va_arg(list, int); 1106 va_end(list); 1107 req->reply_len = 0; 1108 req->reply_expected = 0; 1109 return pmu_queue_request(req); 1110 } 1111 1112 int 1113 pmu_queue_request(struct adb_request *req) 1114 { 1115 unsigned long flags; 1116 int nsend; 1117 1118 if (via == NULL) { 1119 req->complete = 1; 1120 return -ENXIO; 1121 } 1122 if (req->nbytes <= 0) { 1123 req->complete = 1; 1124 return 0; 1125 } 1126 nsend = pmu_data_len[req->data[0]][0]; 1127 if (nsend >= 0 && req->nbytes != nsend + 1) { 1128 req->complete = 1; 1129 return -EINVAL; 1130 } 1131 1132 req->next = NULL; 1133 req->sent = 0; 1134 req->complete = 0; 1135 1136 spin_lock_irqsave(&pmu_lock, flags); 1137 if (current_req != 0) { 1138 last_req->next = req; 1139 last_req = req; 1140 } else { 1141 current_req = req; 1142 last_req = req; 1143 if (pmu_state == idle) 1144 pmu_start(); 1145 } 1146 spin_unlock_irqrestore(&pmu_lock, flags); 1147 1148 return 0; 1149 } 1150 1151 static inline void 1152 wait_for_ack(void) 1153 { 1154 /* Sightly increased the delay, I had one occurrence of the message 1155 * reported 1156 */ 1157 int timeout = 4000; 1158 while ((in_8(&via[B]) & TACK) == 0) { 1159 if (--timeout < 0) { 1160 printk(KERN_ERR "PMU not responding (!ack)\n"); 1161 return; 1162 } 1163 udelay(10); 1164 } 1165 } 1166 1167 /* New PMU seems to be very sensitive to those timings, so we make sure 1168 * PCI is flushed immediately */ 1169 static inline void 1170 send_byte(int x) 1171 { 1172 volatile unsigned char __iomem *v = via; 1173 1174 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT); 1175 out_8(&v[SR], x); 1176 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */ 1177 (void)in_8(&v[B]); 1178 } 1179 1180 static inline void 1181 recv_byte(void) 1182 { 1183 volatile unsigned char __iomem *v = via; 1184 1185 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT); 1186 in_8(&v[SR]); /* resets SR */ 1187 out_8(&v[B], in_8(&v[B]) & ~TREQ); 1188 (void)in_8(&v[B]); 1189 } 1190 1191 static inline void 1192 pmu_done(struct adb_request *req) 1193 { 1194 void (*done)(struct adb_request *) = req->done; 1195 mb(); 1196 req->complete = 1; 1197 /* Here, we assume that if the request has a done member, the 1198 * struct request will survive to setting req->complete to 1 1199 */ 1200 if (done) 1201 (*done)(req); 1202 } 1203 1204 static void 1205 pmu_start(void) 1206 { 1207 struct adb_request *req; 1208 1209 /* assert pmu_state == idle */ 1210 /* get the packet to send */ 1211 req = current_req; 1212 if (req == 0 || pmu_state != idle 1213 || (/*req->reply_expected && */req_awaiting_reply)) 1214 return; 1215 1216 pmu_state = sending; 1217 data_index = 1; 1218 data_len = pmu_data_len[req->data[0]][0]; 1219 1220 /* Sounds safer to make sure ACK is high before writing. This helped 1221 * kill a problem with ADB and some iBooks 1222 */ 1223 wait_for_ack(); 1224 /* set the shift register to shift out and send a byte */ 1225 send_byte(req->data[0]); 1226 } 1227 1228 void 1229 pmu_poll(void) 1230 { 1231 if (!via) 1232 return; 1233 if (disable_poll) 1234 return; 1235 via_pmu_interrupt(0, NULL, NULL); 1236 } 1237 1238 void 1239 pmu_poll_adb(void) 1240 { 1241 if (!via) 1242 return; 1243 if (disable_poll) 1244 return; 1245 /* Kicks ADB read when PMU is suspended */ 1246 adb_int_pending = 1; 1247 do { 1248 via_pmu_interrupt(0, NULL, NULL); 1249 } while (pmu_suspended && (adb_int_pending || pmu_state != idle 1250 || req_awaiting_reply)); 1251 } 1252 1253 void 1254 pmu_wait_complete(struct adb_request *req) 1255 { 1256 if (!via) 1257 return; 1258 while((pmu_state != idle && pmu_state != locked) || !req->complete) 1259 via_pmu_interrupt(0, NULL, NULL); 1260 } 1261 1262 /* This function loops until the PMU is idle and prevents it from 1263 * anwsering to ADB interrupts. pmu_request can still be called. 1264 * This is done to avoid spurrious shutdowns when we know we'll have 1265 * interrupts switched off for a long time 1266 */ 1267 void 1268 pmu_suspend(void) 1269 { 1270 unsigned long flags; 1271 #ifdef SUSPEND_USES_PMU 1272 struct adb_request *req; 1273 #endif 1274 if (!via) 1275 return; 1276 1277 spin_lock_irqsave(&pmu_lock, flags); 1278 pmu_suspended++; 1279 if (pmu_suspended > 1) { 1280 spin_unlock_irqrestore(&pmu_lock, flags); 1281 return; 1282 } 1283 1284 do { 1285 spin_unlock_irqrestore(&pmu_lock, flags); 1286 if (req_awaiting_reply) 1287 adb_int_pending = 1; 1288 via_pmu_interrupt(0, NULL, NULL); 1289 spin_lock_irqsave(&pmu_lock, flags); 1290 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) { 1291 #ifdef SUSPEND_USES_PMU 1292 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 1293 spin_unlock_irqrestore(&pmu_lock, flags); 1294 while(!req.complete) 1295 pmu_poll(); 1296 #else /* SUSPEND_USES_PMU */ 1297 if (gpio_irq >= 0) 1298 disable_irq_nosync(gpio_irq); 1299 out_8(&via[IER], CB1_INT | IER_CLR); 1300 spin_unlock_irqrestore(&pmu_lock, flags); 1301 #endif /* SUSPEND_USES_PMU */ 1302 break; 1303 } 1304 } while (1); 1305 } 1306 1307 void 1308 pmu_resume(void) 1309 { 1310 unsigned long flags; 1311 1312 if (!via || (pmu_suspended < 1)) 1313 return; 1314 1315 spin_lock_irqsave(&pmu_lock, flags); 1316 pmu_suspended--; 1317 if (pmu_suspended > 0) { 1318 spin_unlock_irqrestore(&pmu_lock, flags); 1319 return; 1320 } 1321 adb_int_pending = 1; 1322 #ifdef SUSPEND_USES_PMU 1323 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 1324 spin_unlock_irqrestore(&pmu_lock, flags); 1325 while(!req.complete) 1326 pmu_poll(); 1327 #else /* SUSPEND_USES_PMU */ 1328 if (gpio_irq >= 0) 1329 enable_irq(gpio_irq); 1330 out_8(&via[IER], CB1_INT | IER_SET); 1331 spin_unlock_irqrestore(&pmu_lock, flags); 1332 pmu_poll(); 1333 #endif /* SUSPEND_USES_PMU */ 1334 } 1335 1336 /* Interrupt data could be the result data from an ADB cmd */ 1337 static void 1338 pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs) 1339 { 1340 unsigned char ints, pirq; 1341 int i = 0; 1342 1343 asleep = 0; 1344 if (drop_interrupts || len < 1) { 1345 adb_int_pending = 0; 1346 pmu_irq_stats[8]++; 1347 return; 1348 } 1349 1350 /* Get PMU interrupt mask */ 1351 ints = data[0]; 1352 1353 /* Record zero interrupts for stats */ 1354 if (ints == 0) 1355 pmu_irq_stats[9]++; 1356 1357 /* Hack to deal with ADB autopoll flag */ 1358 if (ints & PMU_INT_ADB) 1359 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL); 1360 1361 next: 1362 1363 if (ints == 0) { 1364 if (i > pmu_irq_stats[10]) 1365 pmu_irq_stats[10] = i; 1366 return; 1367 } 1368 1369 for (pirq = 0; pirq < 8; pirq++) 1370 if (ints & (1 << pirq)) 1371 break; 1372 pmu_irq_stats[pirq]++; 1373 i++; 1374 ints &= ~(1 << pirq); 1375 1376 /* Note: for some reason, we get an interrupt with len=1, 1377 * data[0]==0 after each normal ADB interrupt, at least 1378 * on the Pismo. Still investigating... --BenH 1379 */ 1380 if ((1 << pirq) & PMU_INT_ADB) { 1381 if ((data[0] & PMU_INT_ADB_AUTO) == 0) { 1382 struct adb_request *req = req_awaiting_reply; 1383 if (req == 0) { 1384 printk(KERN_ERR "PMU: extra ADB reply\n"); 1385 return; 1386 } 1387 req_awaiting_reply = NULL; 1388 if (len <= 2) 1389 req->reply_len = 0; 1390 else { 1391 memcpy(req->reply, data + 1, len - 1); 1392 req->reply_len = len - 1; 1393 } 1394 pmu_done(req); 1395 } else { 1396 if (len == 4 && data[1] == 0x2c) { 1397 extern int xmon_wants_key, xmon_adb_keycode; 1398 if (xmon_wants_key) { 1399 xmon_adb_keycode = data[2]; 1400 return; 1401 } 1402 } 1403 #ifdef CONFIG_ADB 1404 /* 1405 * XXX On the [23]400 the PMU gives us an up 1406 * event for keycodes 0x74 or 0x75 when the PC 1407 * card eject buttons are released, so we 1408 * ignore those events. 1409 */ 1410 if (!(pmu_kind == PMU_OHARE_BASED && len == 4 1411 && data[1] == 0x2c && data[3] == 0xff 1412 && (data[2] & ~1) == 0xf4)) 1413 adb_input(data+1, len-1, regs, 1); 1414 #endif /* CONFIG_ADB */ 1415 } 1416 } 1417 /* Sound/brightness button pressed */ 1418 else if ((1 << pirq) & PMU_INT_SNDBRT) { 1419 #ifdef CONFIG_PMAC_BACKLIGHT 1420 if (len == 3) 1421 #ifdef CONFIG_INPUT_ADBHID 1422 if (!disable_kernel_backlight) 1423 #endif /* CONFIG_INPUT_ADBHID */ 1424 set_backlight_level(data[1] >> 4); 1425 #endif /* CONFIG_PMAC_BACKLIGHT */ 1426 } 1427 /* Tick interrupt */ 1428 else if ((1 << pirq) & PMU_INT_TICK) { 1429 /* Environement or tick interrupt, query batteries */ 1430 if (pmu_battery_count) { 1431 if ((--query_batt_timer) == 0) { 1432 query_battery_state(); 1433 query_batt_timer = BATTERY_POLLING_COUNT; 1434 } 1435 } 1436 } 1437 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) { 1438 if (pmu_battery_count) 1439 query_battery_state(); 1440 pmu_pass_intr(data, len); 1441 } else { 1442 pmu_pass_intr(data, len); 1443 } 1444 goto next; 1445 } 1446 1447 static struct adb_request* 1448 pmu_sr_intr(struct pt_regs *regs) 1449 { 1450 struct adb_request *req; 1451 int bite = 0; 1452 1453 if (via[B] & TREQ) { 1454 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]); 1455 out_8(&via[IFR], SR_INT); 1456 return NULL; 1457 } 1458 /* The ack may not yet be low when we get the interrupt */ 1459 while ((in_8(&via[B]) & TACK) != 0) 1460 ; 1461 1462 /* if reading grab the byte, and reset the interrupt */ 1463 if (pmu_state == reading || pmu_state == reading_intr) 1464 bite = in_8(&via[SR]); 1465 1466 /* reset TREQ and wait for TACK to go high */ 1467 out_8(&via[B], in_8(&via[B]) | TREQ); 1468 wait_for_ack(); 1469 1470 switch (pmu_state) { 1471 case sending: 1472 req = current_req; 1473 if (data_len < 0) { 1474 data_len = req->nbytes - 1; 1475 send_byte(data_len); 1476 break; 1477 } 1478 if (data_index <= data_len) { 1479 send_byte(req->data[data_index++]); 1480 break; 1481 } 1482 req->sent = 1; 1483 data_len = pmu_data_len[req->data[0]][1]; 1484 if (data_len == 0) { 1485 pmu_state = idle; 1486 current_req = req->next; 1487 if (req->reply_expected) 1488 req_awaiting_reply = req; 1489 else 1490 return req; 1491 } else { 1492 pmu_state = reading; 1493 data_index = 0; 1494 reply_ptr = req->reply + req->reply_len; 1495 recv_byte(); 1496 } 1497 break; 1498 1499 case intack: 1500 data_index = 0; 1501 data_len = -1; 1502 pmu_state = reading_intr; 1503 reply_ptr = interrupt_data[int_data_last]; 1504 recv_byte(); 1505 if (gpio_irq >= 0 && !gpio_irq_enabled) { 1506 enable_irq(gpio_irq); 1507 gpio_irq_enabled = 1; 1508 } 1509 break; 1510 1511 case reading: 1512 case reading_intr: 1513 if (data_len == -1) { 1514 data_len = bite; 1515 if (bite > 32) 1516 printk(KERN_ERR "PMU: bad reply len %d\n", bite); 1517 } else if (data_index < 32) { 1518 reply_ptr[data_index++] = bite; 1519 } 1520 if (data_index < data_len) { 1521 recv_byte(); 1522 break; 1523 } 1524 1525 if (pmu_state == reading_intr) { 1526 pmu_state = idle; 1527 int_data_state[int_data_last] = int_data_ready; 1528 interrupt_data_len[int_data_last] = data_len; 1529 } else { 1530 req = current_req; 1531 /* 1532 * For PMU sleep and freq change requests, we lock the 1533 * PMU until it's explicitely unlocked. This avoids any 1534 * spurrious event polling getting in 1535 */ 1536 current_req = req->next; 1537 req->reply_len += data_index; 1538 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED) 1539 pmu_state = locked; 1540 else 1541 pmu_state = idle; 1542 return req; 1543 } 1544 break; 1545 1546 default: 1547 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n", 1548 pmu_state); 1549 } 1550 return NULL; 1551 } 1552 1553 static irqreturn_t 1554 via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs) 1555 { 1556 unsigned long flags; 1557 int intr; 1558 int nloop = 0; 1559 int int_data = -1; 1560 struct adb_request *req = NULL; 1561 int handled = 0; 1562 1563 /* This is a bit brutal, we can probably do better */ 1564 spin_lock_irqsave(&pmu_lock, flags); 1565 ++disable_poll; 1566 1567 for (;;) { 1568 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT); 1569 if (intr == 0) 1570 break; 1571 handled = 1; 1572 if (++nloop > 1000) { 1573 printk(KERN_DEBUG "PMU: stuck in intr loop, " 1574 "intr=%x, ier=%x pmu_state=%d\n", 1575 intr, in_8(&via[IER]), pmu_state); 1576 break; 1577 } 1578 out_8(&via[IFR], intr); 1579 if (intr & CB1_INT) { 1580 adb_int_pending = 1; 1581 pmu_irq_stats[0]++; 1582 } 1583 if (intr & SR_INT) { 1584 req = pmu_sr_intr(regs); 1585 if (req) 1586 break; 1587 } 1588 } 1589 1590 recheck: 1591 if (pmu_state == idle) { 1592 if (adb_int_pending) { 1593 if (int_data_state[0] == int_data_empty) 1594 int_data_last = 0; 1595 else if (int_data_state[1] == int_data_empty) 1596 int_data_last = 1; 1597 else 1598 goto no_free_slot; 1599 pmu_state = intack; 1600 int_data_state[int_data_last] = int_data_fill; 1601 /* Sounds safer to make sure ACK is high before writing. 1602 * This helped kill a problem with ADB and some iBooks 1603 */ 1604 wait_for_ack(); 1605 send_byte(PMU_INT_ACK); 1606 adb_int_pending = 0; 1607 } else if (current_req) 1608 pmu_start(); 1609 } 1610 no_free_slot: 1611 /* Mark the oldest buffer for flushing */ 1612 if (int_data_state[!int_data_last] == int_data_ready) { 1613 int_data_state[!int_data_last] = int_data_flush; 1614 int_data = !int_data_last; 1615 } else 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 } 1619 --disable_poll; 1620 spin_unlock_irqrestore(&pmu_lock, flags); 1621 1622 /* Deal with completed PMU requests outside of the lock */ 1623 if (req) { 1624 pmu_done(req); 1625 req = NULL; 1626 } 1627 1628 /* Deal with interrupt datas outside of the lock */ 1629 if (int_data >= 0) { 1630 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs); 1631 spin_lock_irqsave(&pmu_lock, flags); 1632 ++disable_poll; 1633 int_data_state[int_data] = int_data_empty; 1634 int_data = -1; 1635 goto recheck; 1636 } 1637 1638 return IRQ_RETVAL(handled); 1639 } 1640 1641 void 1642 pmu_unlock(void) 1643 { 1644 unsigned long flags; 1645 1646 spin_lock_irqsave(&pmu_lock, flags); 1647 if (pmu_state == locked) 1648 pmu_state = idle; 1649 adb_int_pending = 1; 1650 spin_unlock_irqrestore(&pmu_lock, flags); 1651 } 1652 1653 1654 static irqreturn_t 1655 gpio1_interrupt(int irq, void *arg, struct pt_regs *regs) 1656 { 1657 unsigned long flags; 1658 1659 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) { 1660 spin_lock_irqsave(&pmu_lock, flags); 1661 if (gpio_irq_enabled > 0) { 1662 disable_irq_nosync(gpio_irq); 1663 gpio_irq_enabled = 0; 1664 } 1665 pmu_irq_stats[1]++; 1666 adb_int_pending = 1; 1667 spin_unlock_irqrestore(&pmu_lock, flags); 1668 via_pmu_interrupt(0, NULL, NULL); 1669 return IRQ_HANDLED; 1670 } 1671 return IRQ_NONE; 1672 } 1673 1674 #ifdef CONFIG_PMAC_BACKLIGHT 1675 static int backlight_to_bright[] = { 1676 0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e, 1677 0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e 1678 }; 1679 1680 static int 1681 pmu_set_backlight_enable(int on, int level, void* data) 1682 { 1683 struct adb_request req; 1684 1685 if (vias == NULL) 1686 return -ENODEV; 1687 1688 if (on) { 1689 pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT, 1690 backlight_to_bright[level]); 1691 pmu_wait_complete(&req); 1692 } 1693 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 1694 PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF)); 1695 pmu_wait_complete(&req); 1696 1697 return 0; 1698 } 1699 1700 static void 1701 pmu_bright_complete(struct adb_request *req) 1702 { 1703 if (req == &bright_req_1) 1704 clear_bit(1, &async_req_locks); 1705 if (req == &bright_req_2) 1706 clear_bit(2, &async_req_locks); 1707 } 1708 1709 static int 1710 pmu_set_backlight_level(int level, void* data) 1711 { 1712 if (vias == NULL) 1713 return -ENODEV; 1714 1715 if (test_and_set_bit(1, &async_req_locks)) 1716 return -EAGAIN; 1717 pmu_request(&bright_req_1, pmu_bright_complete, 2, PMU_BACKLIGHT_BRIGHT, 1718 backlight_to_bright[level]); 1719 if (test_and_set_bit(2, &async_req_locks)) 1720 return -EAGAIN; 1721 pmu_request(&bright_req_2, pmu_bright_complete, 2, PMU_POWER_CTRL, 1722 PMU_POW_BACKLIGHT | (level > BACKLIGHT_OFF ? 1723 PMU_POW_ON : PMU_POW_OFF)); 1724 1725 return 0; 1726 } 1727 #endif /* CONFIG_PMAC_BACKLIGHT */ 1728 1729 void 1730 pmu_enable_irled(int on) 1731 { 1732 struct adb_request req; 1733 1734 if (vias == NULL) 1735 return ; 1736 if (pmu_kind == PMU_KEYLARGO_BASED) 1737 return ; 1738 1739 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED | 1740 (on ? PMU_POW_ON : PMU_POW_OFF)); 1741 pmu_wait_complete(&req); 1742 } 1743 1744 void 1745 pmu_restart(void) 1746 { 1747 struct adb_request req; 1748 1749 if (via == NULL) 1750 return; 1751 1752 local_irq_disable(); 1753 1754 drop_interrupts = 1; 1755 1756 if (pmu_kind != PMU_KEYLARGO_BASED) { 1757 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1758 PMU_INT_TICK ); 1759 while(!req.complete) 1760 pmu_poll(); 1761 } 1762 1763 pmu_request(&req, NULL, 1, PMU_RESET); 1764 pmu_wait_complete(&req); 1765 for (;;) 1766 ; 1767 } 1768 1769 void 1770 pmu_shutdown(void) 1771 { 1772 struct adb_request req; 1773 1774 if (via == NULL) 1775 return; 1776 1777 local_irq_disable(); 1778 1779 drop_interrupts = 1; 1780 1781 if (pmu_kind != PMU_KEYLARGO_BASED) { 1782 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | 1783 PMU_INT_TICK ); 1784 pmu_wait_complete(&req); 1785 } else { 1786 /* Disable server mode on shutdown or we'll just 1787 * wake up again 1788 */ 1789 pmu_set_server_mode(0); 1790 } 1791 1792 pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 1793 'M', 'A', 'T', 'T'); 1794 pmu_wait_complete(&req); 1795 for (;;) 1796 ; 1797 } 1798 1799 int 1800 pmu_present(void) 1801 { 1802 return via != 0; 1803 } 1804 1805 struct pmu_i2c_hdr { 1806 u8 bus; 1807 u8 mode; 1808 u8 bus2; 1809 u8 address; 1810 u8 sub_addr; 1811 u8 comb_addr; 1812 u8 count; 1813 }; 1814 1815 int 1816 pmu_i2c_combined_read(int bus, int addr, int subaddr, u8* data, int len) 1817 { 1818 struct adb_request req; 1819 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1]; 1820 int retry; 1821 int rc; 1822 1823 for (retry=0; retry<16; retry++) { 1824 memset(&req, 0, sizeof(req)); 1825 1826 hdr->bus = bus; 1827 hdr->address = addr & 0xfe; 1828 hdr->mode = PMU_I2C_MODE_COMBINED; 1829 hdr->bus2 = 0; 1830 hdr->sub_addr = subaddr; 1831 hdr->comb_addr = addr | 1; 1832 hdr->count = len; 1833 1834 req.nbytes = sizeof(struct pmu_i2c_hdr) + 1; 1835 req.reply_expected = 0; 1836 req.reply_len = 0; 1837 req.data[0] = PMU_I2C_CMD; 1838 req.reply[0] = 0xff; 1839 rc = pmu_queue_request(&req); 1840 if (rc) 1841 return rc; 1842 while(!req.complete) 1843 pmu_poll(); 1844 if (req.reply[0] == PMU_I2C_STATUS_OK) 1845 break; 1846 mdelay(15); 1847 } 1848 if (req.reply[0] != PMU_I2C_STATUS_OK) 1849 return -1; 1850 1851 for (retry=0; retry<16; retry++) { 1852 memset(&req, 0, sizeof(req)); 1853 1854 mdelay(15); 1855 1856 hdr->bus = PMU_I2C_BUS_STATUS; 1857 req.reply[0] = 0xff; 1858 1859 req.nbytes = 2; 1860 req.reply_expected = 0; 1861 req.reply_len = 0; 1862 req.data[0] = PMU_I2C_CMD; 1863 rc = pmu_queue_request(&req); 1864 if (rc) 1865 return rc; 1866 while(!req.complete) 1867 pmu_poll(); 1868 if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) { 1869 memcpy(data, &req.reply[1], req.reply_len - 1); 1870 return req.reply_len - 1; 1871 } 1872 } 1873 return -1; 1874 } 1875 1876 int 1877 pmu_i2c_stdsub_write(int bus, int addr, int subaddr, u8* data, int len) 1878 { 1879 struct adb_request req; 1880 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1]; 1881 int retry; 1882 int rc; 1883 1884 for (retry=0; retry<16; retry++) { 1885 memset(&req, 0, sizeof(req)); 1886 1887 hdr->bus = bus; 1888 hdr->address = addr & 0xfe; 1889 hdr->mode = PMU_I2C_MODE_STDSUB; 1890 hdr->bus2 = 0; 1891 hdr->sub_addr = subaddr; 1892 hdr->comb_addr = addr & 0xfe; 1893 hdr->count = len; 1894 1895 req.data[0] = PMU_I2C_CMD; 1896 memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len); 1897 req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1; 1898 req.reply_expected = 0; 1899 req.reply_len = 0; 1900 req.reply[0] = 0xff; 1901 rc = pmu_queue_request(&req); 1902 if (rc) 1903 return rc; 1904 while(!req.complete) 1905 pmu_poll(); 1906 if (req.reply[0] == PMU_I2C_STATUS_OK) 1907 break; 1908 mdelay(15); 1909 } 1910 if (req.reply[0] != PMU_I2C_STATUS_OK) 1911 return -1; 1912 1913 for (retry=0; retry<16; retry++) { 1914 memset(&req, 0, sizeof(req)); 1915 1916 mdelay(15); 1917 1918 hdr->bus = PMU_I2C_BUS_STATUS; 1919 req.reply[0] = 0xff; 1920 1921 req.nbytes = 2; 1922 req.reply_expected = 0; 1923 req.reply_len = 0; 1924 req.data[0] = PMU_I2C_CMD; 1925 rc = pmu_queue_request(&req); 1926 if (rc) 1927 return rc; 1928 while(!req.complete) 1929 pmu_poll(); 1930 if (req.reply[0] == PMU_I2C_STATUS_OK) 1931 return len; 1932 } 1933 return -1; 1934 } 1935 1936 int 1937 pmu_i2c_simple_read(int bus, int addr, u8* data, int len) 1938 { 1939 struct adb_request req; 1940 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1]; 1941 int retry; 1942 int rc; 1943 1944 for (retry=0; retry<16; retry++) { 1945 memset(&req, 0, sizeof(req)); 1946 1947 hdr->bus = bus; 1948 hdr->address = addr | 1; 1949 hdr->mode = PMU_I2C_MODE_SIMPLE; 1950 hdr->bus2 = 0; 1951 hdr->sub_addr = 0; 1952 hdr->comb_addr = 0; 1953 hdr->count = len; 1954 1955 req.data[0] = PMU_I2C_CMD; 1956 req.nbytes = sizeof(struct pmu_i2c_hdr) + 1; 1957 req.reply_expected = 0; 1958 req.reply_len = 0; 1959 req.reply[0] = 0xff; 1960 rc = pmu_queue_request(&req); 1961 if (rc) 1962 return rc; 1963 while(!req.complete) 1964 pmu_poll(); 1965 if (req.reply[0] == PMU_I2C_STATUS_OK) 1966 break; 1967 mdelay(15); 1968 } 1969 if (req.reply[0] != PMU_I2C_STATUS_OK) 1970 return -1; 1971 1972 for (retry=0; retry<16; retry++) { 1973 memset(&req, 0, sizeof(req)); 1974 1975 mdelay(15); 1976 1977 hdr->bus = PMU_I2C_BUS_STATUS; 1978 req.reply[0] = 0xff; 1979 1980 req.nbytes = 2; 1981 req.reply_expected = 0; 1982 req.reply_len = 0; 1983 req.data[0] = PMU_I2C_CMD; 1984 rc = pmu_queue_request(&req); 1985 if (rc) 1986 return rc; 1987 while(!req.complete) 1988 pmu_poll(); 1989 if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) { 1990 memcpy(data, &req.reply[1], req.reply_len - 1); 1991 return req.reply_len - 1; 1992 } 1993 } 1994 return -1; 1995 } 1996 1997 int 1998 pmu_i2c_simple_write(int bus, int addr, u8* data, int len) 1999 { 2000 struct adb_request req; 2001 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1]; 2002 int retry; 2003 int rc; 2004 2005 for (retry=0; retry<16; retry++) { 2006 memset(&req, 0, sizeof(req)); 2007 2008 hdr->bus = bus; 2009 hdr->address = addr & 0xfe; 2010 hdr->mode = PMU_I2C_MODE_SIMPLE; 2011 hdr->bus2 = 0; 2012 hdr->sub_addr = 0; 2013 hdr->comb_addr = 0; 2014 hdr->count = len; 2015 2016 req.data[0] = PMU_I2C_CMD; 2017 memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len); 2018 req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1; 2019 req.reply_expected = 0; 2020 req.reply_len = 0; 2021 req.reply[0] = 0xff; 2022 rc = pmu_queue_request(&req); 2023 if (rc) 2024 return rc; 2025 while(!req.complete) 2026 pmu_poll(); 2027 if (req.reply[0] == PMU_I2C_STATUS_OK) 2028 break; 2029 mdelay(15); 2030 } 2031 if (req.reply[0] != PMU_I2C_STATUS_OK) 2032 return -1; 2033 2034 for (retry=0; retry<16; retry++) { 2035 memset(&req, 0, sizeof(req)); 2036 2037 mdelay(15); 2038 2039 hdr->bus = PMU_I2C_BUS_STATUS; 2040 req.reply[0] = 0xff; 2041 2042 req.nbytes = 2; 2043 req.reply_expected = 0; 2044 req.reply_len = 0; 2045 req.data[0] = PMU_I2C_CMD; 2046 rc = pmu_queue_request(&req); 2047 if (rc) 2048 return rc; 2049 while(!req.complete) 2050 pmu_poll(); 2051 if (req.reply[0] == PMU_I2C_STATUS_OK) 2052 return len; 2053 } 2054 return -1; 2055 } 2056 2057 #ifdef CONFIG_PM 2058 2059 static LIST_HEAD(sleep_notifiers); 2060 2061 int 2062 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n) 2063 { 2064 struct list_head *list; 2065 struct pmu_sleep_notifier *notifier; 2066 2067 for (list = sleep_notifiers.next; list != &sleep_notifiers; 2068 list = list->next) { 2069 notifier = list_entry(list, struct pmu_sleep_notifier, list); 2070 if (n->priority > notifier->priority) 2071 break; 2072 } 2073 __list_add(&n->list, list->prev, list); 2074 return 0; 2075 } 2076 EXPORT_SYMBOL(pmu_register_sleep_notifier); 2077 2078 int 2079 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n) 2080 { 2081 if (n->list.next == 0) 2082 return -ENOENT; 2083 list_del(&n->list); 2084 n->list.next = NULL; 2085 return 0; 2086 } 2087 EXPORT_SYMBOL(pmu_unregister_sleep_notifier); 2088 #endif /* CONFIG_PM */ 2089 2090 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2091 2092 /* Sleep is broadcast last-to-first */ 2093 static int 2094 broadcast_sleep(int when, int fallback) 2095 { 2096 int ret = PBOOK_SLEEP_OK; 2097 struct list_head *list; 2098 struct pmu_sleep_notifier *notifier; 2099 2100 for (list = sleep_notifiers.prev; list != &sleep_notifiers; 2101 list = list->prev) { 2102 notifier = list_entry(list, struct pmu_sleep_notifier, list); 2103 ret = notifier->notifier_call(notifier, when); 2104 if (ret != PBOOK_SLEEP_OK) { 2105 printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n", 2106 when, notifier, notifier->notifier_call); 2107 for (; list != &sleep_notifiers; list = list->next) { 2108 notifier = list_entry(list, struct pmu_sleep_notifier, list); 2109 notifier->notifier_call(notifier, fallback); 2110 } 2111 return ret; 2112 } 2113 } 2114 return ret; 2115 } 2116 2117 /* Wake is broadcast first-to-last */ 2118 static int 2119 broadcast_wake(void) 2120 { 2121 int ret = PBOOK_SLEEP_OK; 2122 struct list_head *list; 2123 struct pmu_sleep_notifier *notifier; 2124 2125 for (list = sleep_notifiers.next; list != &sleep_notifiers; 2126 list = list->next) { 2127 notifier = list_entry(list, struct pmu_sleep_notifier, list); 2128 notifier->notifier_call(notifier, PBOOK_WAKE); 2129 } 2130 return ret; 2131 } 2132 2133 /* 2134 * This struct is used to store config register values for 2135 * PCI devices which may get powered off when we sleep. 2136 */ 2137 static struct pci_save { 2138 #ifndef HACKED_PCI_SAVE 2139 u16 command; 2140 u16 cache_lat; 2141 u16 intr; 2142 u32 rom_address; 2143 #else 2144 u32 config[16]; 2145 #endif 2146 } *pbook_pci_saves; 2147 static int pbook_npci_saves; 2148 2149 static void 2150 pbook_alloc_pci_save(void) 2151 { 2152 int npci; 2153 struct pci_dev *pd = NULL; 2154 2155 npci = 0; 2156 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 2157 ++npci; 2158 } 2159 if (npci == 0) 2160 return; 2161 pbook_pci_saves = (struct pci_save *) 2162 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL); 2163 pbook_npci_saves = npci; 2164 } 2165 2166 static void 2167 pbook_free_pci_save(void) 2168 { 2169 if (pbook_pci_saves == NULL) 2170 return; 2171 kfree(pbook_pci_saves); 2172 pbook_pci_saves = NULL; 2173 pbook_npci_saves = 0; 2174 } 2175 2176 static void 2177 pbook_pci_save(void) 2178 { 2179 struct pci_save *ps = pbook_pci_saves; 2180 struct pci_dev *pd = NULL; 2181 int npci = pbook_npci_saves; 2182 2183 if (ps == NULL) 2184 return; 2185 2186 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 2187 if (npci-- == 0) 2188 return; 2189 #ifndef HACKED_PCI_SAVE 2190 pci_read_config_word(pd, PCI_COMMAND, &ps->command); 2191 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat); 2192 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr); 2193 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address); 2194 #else 2195 int i; 2196 for (i=1;i<16;i++) 2197 pci_read_config_dword(pd, i<<4, &ps->config[i]); 2198 #endif 2199 ++ps; 2200 } 2201 } 2202 2203 /* For this to work, we must take care of a few things: If gmac was enabled 2204 * during boot, it will be in the pci dev list. If it's disabled at this point 2205 * (and it will probably be), then you can't access it's config space. 2206 */ 2207 static void 2208 pbook_pci_restore(void) 2209 { 2210 u16 cmd; 2211 struct pci_save *ps = pbook_pci_saves - 1; 2212 struct pci_dev *pd = NULL; 2213 int npci = pbook_npci_saves; 2214 int j; 2215 2216 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 2217 #ifdef HACKED_PCI_SAVE 2218 int i; 2219 if (npci-- == 0) 2220 return; 2221 ps++; 2222 for (i=2;i<16;i++) 2223 pci_write_config_dword(pd, i<<4, ps->config[i]); 2224 pci_write_config_dword(pd, 4, ps->config[1]); 2225 #else 2226 if (npci-- == 0) 2227 return; 2228 ps++; 2229 if (ps->command == 0) 2230 continue; 2231 pci_read_config_word(pd, PCI_COMMAND, &cmd); 2232 if ((ps->command & ~cmd) == 0) 2233 continue; 2234 switch (pd->hdr_type) { 2235 case PCI_HEADER_TYPE_NORMAL: 2236 for (j = 0; j < 6; ++j) 2237 pci_write_config_dword(pd, 2238 PCI_BASE_ADDRESS_0 + j*4, 2239 pd->resource[j].start); 2240 pci_write_config_dword(pd, PCI_ROM_ADDRESS, 2241 ps->rom_address); 2242 pci_write_config_word(pd, PCI_CACHE_LINE_SIZE, 2243 ps->cache_lat); 2244 pci_write_config_word(pd, PCI_INTERRUPT_LINE, 2245 ps->intr); 2246 pci_write_config_word(pd, PCI_COMMAND, ps->command); 2247 break; 2248 } 2249 #endif 2250 } 2251 } 2252 2253 #ifdef DEBUG_SLEEP 2254 /* N.B. This doesn't work on the 3400 */ 2255 void 2256 pmu_blink(int n) 2257 { 2258 struct adb_request req; 2259 2260 memset(&req, 0, sizeof(req)); 2261 2262 for (; n > 0; --n) { 2263 req.nbytes = 4; 2264 req.done = NULL; 2265 req.data[0] = 0xee; 2266 req.data[1] = 4; 2267 req.data[2] = 0; 2268 req.data[3] = 1; 2269 req.reply[0] = ADB_RET_OK; 2270 req.reply_len = 1; 2271 req.reply_expected = 0; 2272 pmu_polled_request(&req); 2273 mdelay(50); 2274 req.nbytes = 4; 2275 req.done = NULL; 2276 req.data[0] = 0xee; 2277 req.data[1] = 4; 2278 req.data[2] = 0; 2279 req.data[3] = 0; 2280 req.reply[0] = ADB_RET_OK; 2281 req.reply_len = 1; 2282 req.reply_expected = 0; 2283 pmu_polled_request(&req); 2284 mdelay(50); 2285 } 2286 mdelay(50); 2287 } 2288 #endif 2289 2290 /* 2291 * Put the powerbook to sleep. 2292 */ 2293 2294 static u32 save_via[8]; 2295 2296 static void 2297 save_via_state(void) 2298 { 2299 save_via[0] = in_8(&via[ANH]); 2300 save_via[1] = in_8(&via[DIRA]); 2301 save_via[2] = in_8(&via[B]); 2302 save_via[3] = in_8(&via[DIRB]); 2303 save_via[4] = in_8(&via[PCR]); 2304 save_via[5] = in_8(&via[ACR]); 2305 save_via[6] = in_8(&via[T1CL]); 2306 save_via[7] = in_8(&via[T1CH]); 2307 } 2308 static void 2309 restore_via_state(void) 2310 { 2311 out_8(&via[ANH], save_via[0]); 2312 out_8(&via[DIRA], save_via[1]); 2313 out_8(&via[B], save_via[2]); 2314 out_8(&via[DIRB], save_via[3]); 2315 out_8(&via[PCR], save_via[4]); 2316 out_8(&via[ACR], save_via[5]); 2317 out_8(&via[T1CL], save_via[6]); 2318 out_8(&via[T1CH], save_via[7]); 2319 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 2320 out_8(&via[IFR], 0x7f); /* clear IFR */ 2321 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 2322 } 2323 2324 static int 2325 pmac_suspend_devices(void) 2326 { 2327 int ret; 2328 2329 pm_prepare_console(); 2330 2331 /* Notify old-style device drivers & userland */ 2332 ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT); 2333 if (ret != PBOOK_SLEEP_OK) { 2334 printk(KERN_ERR "Sleep rejected by drivers\n"); 2335 return -EBUSY; 2336 } 2337 2338 /* Sync the disks. */ 2339 /* XXX It would be nice to have some way to ensure that 2340 * nobody is dirtying any new buffers while we wait. That 2341 * could be achieved using the refrigerator for processes 2342 * that swsusp uses 2343 */ 2344 sys_sync(); 2345 2346 /* Sleep can fail now. May not be very robust but useful for debugging */ 2347 ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE); 2348 if (ret != PBOOK_SLEEP_OK) { 2349 printk(KERN_ERR "Driver sleep failed\n"); 2350 return -EBUSY; 2351 } 2352 2353 /* Send suspend call to devices, hold the device core's dpm_sem */ 2354 ret = device_suspend(PMSG_SUSPEND); 2355 if (ret) { 2356 broadcast_wake(); 2357 printk(KERN_ERR "Driver sleep failed\n"); 2358 return -EBUSY; 2359 } 2360 2361 /* Disable clock spreading on some machines */ 2362 pmac_tweak_clock_spreading(0); 2363 2364 /* Stop preemption */ 2365 preempt_disable(); 2366 2367 /* Make sure the decrementer won't interrupt us */ 2368 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 2369 /* Make sure any pending DEC interrupt occurring while we did 2370 * the above didn't re-enable the DEC */ 2371 mb(); 2372 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 2373 2374 /* We can now disable MSR_EE. This code of course works properly only 2375 * on UP machines... For SMP, if we ever implement sleep, we'll have to 2376 * stop the "other" CPUs way before we do all that stuff. 2377 */ 2378 local_irq_disable(); 2379 2380 /* Broadcast power down irq 2381 * This isn't that useful in most cases (only directly wired devices can 2382 * use this but still... This will take care of sysdev's as well, so 2383 * we exit from here with local irqs disabled and PIC off. 2384 */ 2385 ret = device_power_down(PMSG_SUSPEND); 2386 if (ret) { 2387 wakeup_decrementer(); 2388 local_irq_enable(); 2389 preempt_enable(); 2390 device_resume(); 2391 broadcast_wake(); 2392 printk(KERN_ERR "Driver powerdown failed\n"); 2393 return -EBUSY; 2394 } 2395 2396 /* Wait for completion of async backlight requests */ 2397 while (!bright_req_1.complete || !bright_req_2.complete || 2398 !batt_req.complete) 2399 pmu_poll(); 2400 2401 /* Giveup the lazy FPU & vec so we don't have to back them 2402 * up from the low level code 2403 */ 2404 enable_kernel_fp(); 2405 2406 #ifdef CONFIG_ALTIVEC 2407 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 2408 enable_kernel_altivec(); 2409 #endif /* CONFIG_ALTIVEC */ 2410 2411 return 0; 2412 } 2413 2414 static int 2415 pmac_wakeup_devices(void) 2416 { 2417 mdelay(100); 2418 2419 /* Power back up system devices (including the PIC) */ 2420 device_power_up(); 2421 2422 /* Force a poll of ADB interrupts */ 2423 adb_int_pending = 1; 2424 via_pmu_interrupt(0, NULL, NULL); 2425 2426 /* Restart jiffies & scheduling */ 2427 wakeup_decrementer(); 2428 2429 /* Re-enable local CPU interrupts */ 2430 local_irq_enable(); 2431 mdelay(10); 2432 preempt_enable(); 2433 2434 /* Re-enable clock spreading on some machines */ 2435 pmac_tweak_clock_spreading(1); 2436 2437 /* Resume devices */ 2438 device_resume(); 2439 2440 /* Notify old style drivers */ 2441 broadcast_wake(); 2442 2443 pm_restore_console(); 2444 2445 return 0; 2446 } 2447 2448 #define GRACKLE_PM (1<<7) 2449 #define GRACKLE_DOZE (1<<5) 2450 #define GRACKLE_NAP (1<<4) 2451 #define GRACKLE_SLEEP (1<<3) 2452 2453 int 2454 powerbook_sleep_grackle(void) 2455 { 2456 unsigned long save_l2cr; 2457 unsigned short pmcr1; 2458 struct adb_request req; 2459 int ret; 2460 struct pci_dev *grackle; 2461 2462 grackle = pci_find_slot(0, 0); 2463 if (!grackle) 2464 return -ENODEV; 2465 2466 ret = pmac_suspend_devices(); 2467 if (ret) { 2468 printk(KERN_ERR "Sleep rejected by devices\n"); 2469 return ret; 2470 } 2471 2472 /* Turn off various things. Darwin does some retry tests here... */ 2473 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE); 2474 pmu_wait_complete(&req); 2475 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 2476 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY); 2477 pmu_wait_complete(&req); 2478 2479 /* For 750, save backside cache setting and disable it */ 2480 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 2481 2482 if (!__fake_sleep) { 2483 /* Ask the PMU to put us to sleep */ 2484 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2485 pmu_wait_complete(&req); 2486 } 2487 2488 /* The VIA is supposed not to be restored correctly*/ 2489 save_via_state(); 2490 /* We shut down some HW */ 2491 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 2492 2493 pci_read_config_word(grackle, 0x70, &pmcr1); 2494 /* Apparently, MacOS uses NAP mode for Grackle ??? */ 2495 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 2496 pmcr1 |= GRACKLE_PM|GRACKLE_NAP; 2497 pci_write_config_word(grackle, 0x70, pmcr1); 2498 2499 /* Call low-level ASM sleep handler */ 2500 if (__fake_sleep) 2501 mdelay(5000); 2502 else 2503 low_sleep_handler(); 2504 2505 /* We're awake again, stop grackle PM */ 2506 pci_read_config_word(grackle, 0x70, &pmcr1); 2507 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 2508 pci_write_config_word(grackle, 0x70, pmcr1); 2509 2510 /* Make sure the PMU is idle */ 2511 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 2512 restore_via_state(); 2513 2514 /* Restore L2 cache */ 2515 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2516 _set_L2CR(save_l2cr); 2517 2518 /* Restore userland MMU context */ 2519 set_context(current->active_mm->context, current->active_mm->pgd); 2520 2521 /* Power things up */ 2522 pmu_unlock(); 2523 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2524 pmu_wait_complete(&req); 2525 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, 2526 PMU_POW0_ON|PMU_POW0_HARD_DRIVE); 2527 pmu_wait_complete(&req); 2528 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 2529 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY); 2530 pmu_wait_complete(&req); 2531 2532 pmac_wakeup_devices(); 2533 2534 return 0; 2535 } 2536 2537 static int 2538 powerbook_sleep_Core99(void) 2539 { 2540 unsigned long save_l2cr; 2541 unsigned long save_l3cr; 2542 struct adb_request req; 2543 int ret; 2544 2545 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) { 2546 printk(KERN_ERR "Sleep mode not supported on this machine\n"); 2547 return -ENOSYS; 2548 } 2549 2550 if (num_online_cpus() > 1 || cpu_is_offline(0)) 2551 return -EAGAIN; 2552 2553 ret = pmac_suspend_devices(); 2554 if (ret) { 2555 printk(KERN_ERR "Sleep rejected by devices\n"); 2556 return ret; 2557 } 2558 2559 /* Stop environment and ADB interrupts */ 2560 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 2561 pmu_wait_complete(&req); 2562 2563 /* Tell PMU what events will wake us up */ 2564 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS, 2565 0xff, 0xff); 2566 pmu_wait_complete(&req); 2567 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS, 2568 0, PMU_PWR_WAKEUP_KEY | 2569 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0)); 2570 pmu_wait_complete(&req); 2571 2572 /* Save the state of the L2 and L3 caches */ 2573 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */ 2574 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 2575 2576 if (!__fake_sleep) { 2577 /* Ask the PMU to put us to sleep */ 2578 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2579 pmu_wait_complete(&req); 2580 } 2581 2582 /* The VIA is supposed not to be restored correctly*/ 2583 save_via_state(); 2584 2585 /* Shut down various ASICs. There's a chance that we can no longer 2586 * talk to the PMU after this, so I moved it to _after_ sending the 2587 * sleep command to it. Still need to be checked. 2588 */ 2589 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 2590 2591 /* Call low-level ASM sleep handler */ 2592 if (__fake_sleep) 2593 mdelay(5000); 2594 else 2595 low_sleep_handler(); 2596 2597 /* Restore Apple core ASICs state */ 2598 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 2599 2600 /* Restore VIA */ 2601 restore_via_state(); 2602 2603 /* tweak LPJ before cpufreq is there */ 2604 loops_per_jiffy *= 2; 2605 2606 /* Restore video */ 2607 pmac_call_early_video_resume(); 2608 2609 /* Restore L2 cache */ 2610 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2611 _set_L2CR(save_l2cr); 2612 /* Restore L3 cache */ 2613 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0) 2614 _set_L3CR(save_l3cr); 2615 2616 /* Restore userland MMU context */ 2617 set_context(current->active_mm->context, current->active_mm->pgd); 2618 2619 /* Tell PMU we are ready */ 2620 pmu_unlock(); 2621 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2622 pmu_wait_complete(&req); 2623 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2624 pmu_wait_complete(&req); 2625 2626 /* Restore LPJ, cpufreq will adjust the cpu frequency */ 2627 loops_per_jiffy /= 2; 2628 2629 pmac_wakeup_devices(); 2630 2631 return 0; 2632 } 2633 2634 #define PB3400_MEM_CTRL 0xf8000000 2635 #define PB3400_MEM_CTRL_SLEEP 0x70 2636 2637 static int 2638 powerbook_sleep_3400(void) 2639 { 2640 int ret, i, x; 2641 unsigned int hid0; 2642 unsigned long p; 2643 struct adb_request sleep_req; 2644 void __iomem *mem_ctrl; 2645 unsigned int __iomem *mem_ctrl_sleep; 2646 2647 /* first map in the memory controller registers */ 2648 mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100); 2649 if (mem_ctrl == NULL) { 2650 printk("powerbook_sleep_3400: ioremap failed\n"); 2651 return -ENOMEM; 2652 } 2653 mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP; 2654 2655 /* Allocate room for PCI save */ 2656 pbook_alloc_pci_save(); 2657 2658 ret = pmac_suspend_devices(); 2659 if (ret) { 2660 pbook_free_pci_save(); 2661 printk(KERN_ERR "Sleep rejected by devices\n"); 2662 return ret; 2663 } 2664 2665 /* Save the state of PCI config space for some slots */ 2666 pbook_pci_save(); 2667 2668 /* Set the memory controller to keep the memory refreshed 2669 while we're asleep */ 2670 for (i = 0x403f; i >= 0x4000; --i) { 2671 out_be32(mem_ctrl_sleep, i); 2672 do { 2673 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff; 2674 } while (x == 0); 2675 if (x >= 0x100) 2676 break; 2677 } 2678 2679 /* Ask the PMU to put us to sleep */ 2680 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2681 while (!sleep_req.complete) 2682 mb(); 2683 2684 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 2685 2686 /* displacement-flush the L2 cache - necessary? */ 2687 for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000) 2688 i = *(volatile int *)p; 2689 asleep = 1; 2690 2691 /* Put the CPU into sleep mode */ 2692 hid0 = mfspr(SPRN_HID0); 2693 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP; 2694 mtspr(SPRN_HID0, hid0); 2695 mtmsr(mfmsr() | MSR_POW | MSR_EE); 2696 udelay(10); 2697 2698 /* OK, we're awake again, start restoring things */ 2699 out_be32(mem_ctrl_sleep, 0x3f); 2700 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 2701 pbook_pci_restore(); 2702 pmu_unlock(); 2703 2704 /* wait for the PMU interrupt sequence to complete */ 2705 while (asleep) 2706 mb(); 2707 2708 pmac_wakeup_devices(); 2709 pbook_free_pci_save(); 2710 iounmap(mem_ctrl); 2711 2712 return 0; 2713 } 2714 2715 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2716 2717 /* 2718 * Support for /dev/pmu device 2719 */ 2720 #define RB_SIZE 0x10 2721 struct pmu_private { 2722 struct list_head list; 2723 int rb_get; 2724 int rb_put; 2725 struct rb_entry { 2726 unsigned short len; 2727 unsigned char data[16]; 2728 } rb_buf[RB_SIZE]; 2729 wait_queue_head_t wait; 2730 spinlock_t lock; 2731 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2732 int backlight_locker; 2733 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 2734 }; 2735 2736 static LIST_HEAD(all_pmu_pvt); 2737 static DEFINE_SPINLOCK(all_pvt_lock); 2738 2739 static void 2740 pmu_pass_intr(unsigned char *data, int len) 2741 { 2742 struct pmu_private *pp; 2743 struct list_head *list; 2744 int i; 2745 unsigned long flags; 2746 2747 if (len > sizeof(pp->rb_buf[0].data)) 2748 len = sizeof(pp->rb_buf[0].data); 2749 spin_lock_irqsave(&all_pvt_lock, flags); 2750 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) { 2751 pp = list_entry(list, struct pmu_private, list); 2752 spin_lock(&pp->lock); 2753 i = pp->rb_put + 1; 2754 if (i >= RB_SIZE) 2755 i = 0; 2756 if (i != pp->rb_get) { 2757 struct rb_entry *rp = &pp->rb_buf[pp->rb_put]; 2758 rp->len = len; 2759 memcpy(rp->data, data, len); 2760 pp->rb_put = i; 2761 wake_up_interruptible(&pp->wait); 2762 } 2763 spin_unlock(&pp->lock); 2764 } 2765 spin_unlock_irqrestore(&all_pvt_lock, flags); 2766 } 2767 2768 static int 2769 pmu_open(struct inode *inode, struct file *file) 2770 { 2771 struct pmu_private *pp; 2772 unsigned long flags; 2773 2774 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL); 2775 if (pp == 0) 2776 return -ENOMEM; 2777 pp->rb_get = pp->rb_put = 0; 2778 spin_lock_init(&pp->lock); 2779 init_waitqueue_head(&pp->wait); 2780 spin_lock_irqsave(&all_pvt_lock, flags); 2781 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2782 pp->backlight_locker = 0; 2783 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 2784 list_add(&pp->list, &all_pmu_pvt); 2785 spin_unlock_irqrestore(&all_pvt_lock, flags); 2786 file->private_data = pp; 2787 return 0; 2788 } 2789 2790 static ssize_t 2791 pmu_read(struct file *file, char __user *buf, 2792 size_t count, loff_t *ppos) 2793 { 2794 struct pmu_private *pp = file->private_data; 2795 DECLARE_WAITQUEUE(wait, current); 2796 unsigned long flags; 2797 int ret = 0; 2798 2799 if (count < 1 || pp == 0) 2800 return -EINVAL; 2801 if (!access_ok(VERIFY_WRITE, buf, count)) 2802 return -EFAULT; 2803 2804 spin_lock_irqsave(&pp->lock, flags); 2805 add_wait_queue(&pp->wait, &wait); 2806 current->state = TASK_INTERRUPTIBLE; 2807 2808 for (;;) { 2809 ret = -EAGAIN; 2810 if (pp->rb_get != pp->rb_put) { 2811 int i = pp->rb_get; 2812 struct rb_entry *rp = &pp->rb_buf[i]; 2813 ret = rp->len; 2814 spin_unlock_irqrestore(&pp->lock, flags); 2815 if (ret > count) 2816 ret = count; 2817 if (ret > 0 && copy_to_user(buf, rp->data, ret)) 2818 ret = -EFAULT; 2819 if (++i >= RB_SIZE) 2820 i = 0; 2821 spin_lock_irqsave(&pp->lock, flags); 2822 pp->rb_get = i; 2823 } 2824 if (ret >= 0) 2825 break; 2826 if (file->f_flags & O_NONBLOCK) 2827 break; 2828 ret = -ERESTARTSYS; 2829 if (signal_pending(current)) 2830 break; 2831 spin_unlock_irqrestore(&pp->lock, flags); 2832 schedule(); 2833 spin_lock_irqsave(&pp->lock, flags); 2834 } 2835 current->state = TASK_RUNNING; 2836 remove_wait_queue(&pp->wait, &wait); 2837 spin_unlock_irqrestore(&pp->lock, flags); 2838 2839 return ret; 2840 } 2841 2842 static ssize_t 2843 pmu_write(struct file *file, const char __user *buf, 2844 size_t count, loff_t *ppos) 2845 { 2846 return 0; 2847 } 2848 2849 static unsigned int 2850 pmu_fpoll(struct file *filp, poll_table *wait) 2851 { 2852 struct pmu_private *pp = filp->private_data; 2853 unsigned int mask = 0; 2854 unsigned long flags; 2855 2856 if (pp == 0) 2857 return 0; 2858 poll_wait(filp, &pp->wait, wait); 2859 spin_lock_irqsave(&pp->lock, flags); 2860 if (pp->rb_get != pp->rb_put) 2861 mask |= POLLIN; 2862 spin_unlock_irqrestore(&pp->lock, flags); 2863 return mask; 2864 } 2865 2866 static int 2867 pmu_release(struct inode *inode, struct file *file) 2868 { 2869 struct pmu_private *pp = file->private_data; 2870 unsigned long flags; 2871 2872 lock_kernel(); 2873 if (pp != 0) { 2874 file->private_data = NULL; 2875 spin_lock_irqsave(&all_pvt_lock, flags); 2876 list_del(&pp->list); 2877 spin_unlock_irqrestore(&all_pvt_lock, flags); 2878 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2879 if (pp->backlight_locker) { 2880 spin_lock_irqsave(&pmu_lock, flags); 2881 disable_kernel_backlight--; 2882 spin_unlock_irqrestore(&pmu_lock, flags); 2883 } 2884 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 2885 kfree(pp); 2886 } 2887 unlock_kernel(); 2888 return 0; 2889 } 2890 2891 static int 2892 pmu_ioctl(struct inode * inode, struct file *filp, 2893 u_int cmd, u_long arg) 2894 { 2895 __u32 __user *argp = (__u32 __user *)arg; 2896 int error = -EINVAL; 2897 2898 switch (cmd) { 2899 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2900 case PMU_IOC_SLEEP: 2901 if (!capable(CAP_SYS_ADMIN)) 2902 return -EACCES; 2903 if (sleep_in_progress) 2904 return -EBUSY; 2905 sleep_in_progress = 1; 2906 switch (pmu_kind) { 2907 case PMU_OHARE_BASED: 2908 error = powerbook_sleep_3400(); 2909 break; 2910 case PMU_HEATHROW_BASED: 2911 case PMU_PADDINGTON_BASED: 2912 error = powerbook_sleep_grackle(); 2913 break; 2914 case PMU_KEYLARGO_BASED: 2915 error = powerbook_sleep_Core99(); 2916 break; 2917 default: 2918 error = -ENOSYS; 2919 } 2920 sleep_in_progress = 0; 2921 break; 2922 case PMU_IOC_CAN_SLEEP: 2923 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) 2924 return put_user(0, argp); 2925 else 2926 return put_user(1, argp); 2927 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2928 2929 #ifdef CONFIG_PMAC_BACKLIGHT 2930 /* Backlight should have its own device or go via 2931 * the fbdev 2932 */ 2933 case PMU_IOC_GET_BACKLIGHT: 2934 if (sleep_in_progress) 2935 return -EBUSY; 2936 error = get_backlight_level(); 2937 if (error < 0) 2938 return error; 2939 return put_user(error, argp); 2940 case PMU_IOC_SET_BACKLIGHT: 2941 { 2942 __u32 value; 2943 if (sleep_in_progress) 2944 return -EBUSY; 2945 error = get_user(value, argp); 2946 if (!error) 2947 error = set_backlight_level(value); 2948 break; 2949 } 2950 #ifdef CONFIG_INPUT_ADBHID 2951 case PMU_IOC_GRAB_BACKLIGHT: { 2952 struct pmu_private *pp = filp->private_data; 2953 unsigned long flags; 2954 2955 if (pp->backlight_locker) 2956 return 0; 2957 pp->backlight_locker = 1; 2958 spin_lock_irqsave(&pmu_lock, flags); 2959 disable_kernel_backlight++; 2960 spin_unlock_irqrestore(&pmu_lock, flags); 2961 return 0; 2962 } 2963 #endif /* CONFIG_INPUT_ADBHID */ 2964 #endif /* CONFIG_PMAC_BACKLIGHT */ 2965 case PMU_IOC_GET_MODEL: 2966 return put_user(pmu_kind, argp); 2967 case PMU_IOC_HAS_ADB: 2968 return put_user(pmu_has_adb, argp); 2969 } 2970 return error; 2971 } 2972 2973 static struct file_operations pmu_device_fops = { 2974 .read = pmu_read, 2975 .write = pmu_write, 2976 .poll = pmu_fpoll, 2977 .ioctl = pmu_ioctl, 2978 .open = pmu_open, 2979 .release = pmu_release, 2980 }; 2981 2982 static struct miscdevice pmu_device = { 2983 PMU_MINOR, "pmu", &pmu_device_fops 2984 }; 2985 2986 static int pmu_device_init(void) 2987 { 2988 if (!via) 2989 return 0; 2990 if (misc_register(&pmu_device) < 0) 2991 printk(KERN_ERR "via-pmu: cannot register misc device.\n"); 2992 return 0; 2993 } 2994 device_initcall(pmu_device_init); 2995 2996 2997 #ifdef DEBUG_SLEEP 2998 static inline void 2999 polled_handshake(volatile unsigned char __iomem *via) 3000 { 3001 via[B] &= ~TREQ; eieio(); 3002 while ((via[B] & TACK) != 0) 3003 ; 3004 via[B] |= TREQ; eieio(); 3005 while ((via[B] & TACK) == 0) 3006 ; 3007 } 3008 3009 static inline void 3010 polled_send_byte(volatile unsigned char __iomem *via, int x) 3011 { 3012 via[ACR] |= SR_OUT | SR_EXT; eieio(); 3013 via[SR] = x; eieio(); 3014 polled_handshake(via); 3015 } 3016 3017 static inline int 3018 polled_recv_byte(volatile unsigned char __iomem *via) 3019 { 3020 int x; 3021 3022 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio(); 3023 x = via[SR]; eieio(); 3024 polled_handshake(via); 3025 x = via[SR]; eieio(); 3026 return x; 3027 } 3028 3029 int 3030 pmu_polled_request(struct adb_request *req) 3031 { 3032 unsigned long flags; 3033 int i, l, c; 3034 volatile unsigned char __iomem *v = via; 3035 3036 req->complete = 1; 3037 c = req->data[0]; 3038 l = pmu_data_len[c][0]; 3039 if (l >= 0 && req->nbytes != l + 1) 3040 return -EINVAL; 3041 3042 local_irq_save(flags); 3043 while (pmu_state != idle) 3044 pmu_poll(); 3045 3046 while ((via[B] & TACK) == 0) 3047 ; 3048 polled_send_byte(v, c); 3049 if (l < 0) { 3050 l = req->nbytes - 1; 3051 polled_send_byte(v, l); 3052 } 3053 for (i = 1; i <= l; ++i) 3054 polled_send_byte(v, req->data[i]); 3055 3056 l = pmu_data_len[c][1]; 3057 if (l < 0) 3058 l = polled_recv_byte(v); 3059 for (i = 0; i < l; ++i) 3060 req->reply[i + req->reply_len] = polled_recv_byte(v); 3061 3062 if (req->done) 3063 (*req->done)(req); 3064 3065 local_irq_restore(flags); 3066 return 0; 3067 } 3068 #endif /* DEBUG_SLEEP */ 3069 3070 3071 /* FIXME: This is a temporary set of callbacks to enable us 3072 * to do suspend-to-disk. 3073 */ 3074 3075 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 3076 3077 static int pmu_sys_suspended = 0; 3078 3079 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state) 3080 { 3081 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended) 3082 return 0; 3083 3084 /* Suspend PMU event interrupts */ 3085 pmu_suspend(); 3086 3087 pmu_sys_suspended = 1; 3088 return 0; 3089 } 3090 3091 static int pmu_sys_resume(struct sys_device *sysdev) 3092 { 3093 struct adb_request req; 3094 3095 if (!pmu_sys_suspended) 3096 return 0; 3097 3098 /* Tell PMU we are ready */ 3099 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 3100 pmu_wait_complete(&req); 3101 3102 /* Resume PMU event interrupts */ 3103 pmu_resume(); 3104 3105 pmu_sys_suspended = 0; 3106 3107 return 0; 3108 } 3109 3110 #endif /* CONFIG_PM && CONFIG_PPC32 */ 3111 3112 static struct sysdev_class pmu_sysclass = { 3113 set_kset_name("pmu"), 3114 }; 3115 3116 static struct sys_device device_pmu = { 3117 .id = 0, 3118 .cls = &pmu_sysclass, 3119 }; 3120 3121 static struct sysdev_driver driver_pmu = { 3122 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 3123 .suspend = &pmu_sys_suspend, 3124 .resume = &pmu_sys_resume, 3125 #endif /* CONFIG_PM && CONFIG_PPC32 */ 3126 }; 3127 3128 static int __init init_pmu_sysfs(void) 3129 { 3130 int rc; 3131 3132 rc = sysdev_class_register(&pmu_sysclass); 3133 if (rc) { 3134 printk(KERN_ERR "Failed registering PMU sys class\n"); 3135 return -ENODEV; 3136 } 3137 rc = sysdev_register(&device_pmu); 3138 if (rc) { 3139 printk(KERN_ERR "Failed registering PMU sys device\n"); 3140 return -ENODEV; 3141 } 3142 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu); 3143 if (rc) { 3144 printk(KERN_ERR "Failed registering PMU sys driver\n"); 3145 return -ENODEV; 3146 } 3147 return 0; 3148 } 3149 3150 subsys_initcall(init_pmu_sysfs); 3151 3152 EXPORT_SYMBOL(pmu_request); 3153 EXPORT_SYMBOL(pmu_poll); 3154 EXPORT_SYMBOL(pmu_poll_adb); 3155 EXPORT_SYMBOL(pmu_wait_complete); 3156 EXPORT_SYMBOL(pmu_suspend); 3157 EXPORT_SYMBOL(pmu_resume); 3158 EXPORT_SYMBOL(pmu_unlock); 3159 EXPORT_SYMBOL(pmu_i2c_combined_read); 3160 EXPORT_SYMBOL(pmu_i2c_stdsub_write); 3161 EXPORT_SYMBOL(pmu_i2c_simple_read); 3162 EXPORT_SYMBOL(pmu_i2c_simple_write); 3163 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 3164 EXPORT_SYMBOL(pmu_enable_irled); 3165 EXPORT_SYMBOL(pmu_battery_count); 3166 EXPORT_SYMBOL(pmu_batteries); 3167 EXPORT_SYMBOL(pmu_power_flags); 3168 #endif /* CONFIG_PM && CONFIG_PPC32 */ 3169 3170