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/pmac_pfunc.h> 59 #include <asm/pmac_low_i2c.h> 60 #include <asm/uaccess.h> 61 #include <asm/mmu_context.h> 62 #include <asm/cputable.h> 63 #include <asm/time.h> 64 #ifdef CONFIG_PMAC_BACKLIGHT 65 #include <asm/backlight.h> 66 #endif 67 68 #ifdef CONFIG_PPC32 69 #include <asm/open_pic.h> 70 #endif 71 72 /* Some compile options */ 73 #undef SUSPEND_USES_PMU 74 #define DEBUG_SLEEP 75 #undef HACKED_PCI_SAVE 76 77 /* Misc minor number allocated for /dev/pmu */ 78 #define PMU_MINOR 154 79 80 /* How many iterations between battery polls */ 81 #define BATTERY_POLLING_COUNT 2 82 83 static volatile unsigned char __iomem *via; 84 85 /* VIA registers - spaced 0x200 bytes apart */ 86 #define RS 0x200 /* skip between registers */ 87 #define B 0 /* B-side data */ 88 #define A RS /* A-side data */ 89 #define DIRB (2*RS) /* B-side direction (1=output) */ 90 #define DIRA (3*RS) /* A-side direction (1=output) */ 91 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */ 92 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */ 93 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */ 94 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */ 95 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */ 96 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */ 97 #define SR (10*RS) /* Shift register */ 98 #define ACR (11*RS) /* Auxiliary control register */ 99 #define PCR (12*RS) /* Peripheral control register */ 100 #define IFR (13*RS) /* Interrupt flag register */ 101 #define IER (14*RS) /* Interrupt enable register */ 102 #define ANH (15*RS) /* A-side data, no handshake */ 103 104 /* Bits in B data register: both active low */ 105 #define TACK 0x08 /* Transfer acknowledge (input) */ 106 #define TREQ 0x10 /* Transfer request (output) */ 107 108 /* Bits in ACR */ 109 #define SR_CTRL 0x1c /* Shift register control bits */ 110 #define SR_EXT 0x0c /* Shift on external clock */ 111 #define SR_OUT 0x10 /* Shift out if 1 */ 112 113 /* Bits in IFR and IER */ 114 #define IER_SET 0x80 /* set bits in IER */ 115 #define IER_CLR 0 /* clear bits in IER */ 116 #define SR_INT 0x04 /* Shift register full/empty */ 117 #define CB2_INT 0x08 118 #define CB1_INT 0x10 /* transition on CB1 input */ 119 120 static volatile enum pmu_state { 121 idle, 122 sending, 123 intack, 124 reading, 125 reading_intr, 126 locked, 127 } pmu_state; 128 129 static volatile enum int_data_state { 130 int_data_empty, 131 int_data_fill, 132 int_data_ready, 133 int_data_flush 134 } int_data_state[2] = { int_data_empty, int_data_empty }; 135 136 static struct adb_request *current_req; 137 static struct adb_request *last_req; 138 static struct adb_request *req_awaiting_reply; 139 static unsigned char interrupt_data[2][32]; 140 static int interrupt_data_len[2]; 141 static int int_data_last; 142 static unsigned char *reply_ptr; 143 static int data_index; 144 static int data_len; 145 static volatile int adb_int_pending; 146 static volatile int disable_poll; 147 static struct adb_request bright_req_1, bright_req_2; 148 static struct device_node *vias; 149 static int pmu_kind = PMU_UNKNOWN; 150 static int pmu_fully_inited = 0; 151 static int pmu_has_adb; 152 static struct device_node *gpio_node; 153 static unsigned char __iomem *gpio_reg = NULL; 154 static int gpio_irq = -1; 155 static int gpio_irq_enabled = -1; 156 static volatile int pmu_suspended = 0; 157 static spinlock_t pmu_lock; 158 static u8 pmu_intr_mask; 159 static int pmu_version; 160 static int drop_interrupts; 161 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 162 static int option_lid_wakeup = 1; 163 #endif /* CONFIG_PM && CONFIG_PPC32 */ 164 #if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT) 165 static int sleep_in_progress; 166 #endif 167 static unsigned long async_req_locks; 168 static unsigned int pmu_irq_stats[11]; 169 170 static struct proc_dir_entry *proc_pmu_root; 171 static struct proc_dir_entry *proc_pmu_info; 172 static struct proc_dir_entry *proc_pmu_irqstats; 173 static struct proc_dir_entry *proc_pmu_options; 174 static int option_server_mode; 175 176 int pmu_battery_count; 177 int pmu_cur_battery; 178 unsigned int pmu_power_flags; 179 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES]; 180 static int query_batt_timer = BATTERY_POLLING_COUNT; 181 static struct adb_request batt_req; 182 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES]; 183 184 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 185 extern int disable_kernel_backlight; 186 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 187 188 int __fake_sleep; 189 int asleep; 190 BLOCKING_NOTIFIER_HEAD(sleep_notifier_list); 191 192 #ifdef CONFIG_ADB 193 static int adb_dev_map = 0; 194 static int pmu_adb_flags; 195 196 static int pmu_probe(void); 197 static int pmu_init(void); 198 static int pmu_send_request(struct adb_request *req, int sync); 199 static int pmu_adb_autopoll(int devs); 200 static int pmu_adb_reset_bus(void); 201 #endif /* CONFIG_ADB */ 202 203 static int init_pmu(void); 204 static void pmu_start(void); 205 static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs); 206 static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs); 207 static int proc_get_info(char *page, char **start, off_t off, 208 int count, int *eof, void *data); 209 static int proc_get_irqstats(char *page, char **start, off_t off, 210 int count, int *eof, void *data); 211 #ifdef CONFIG_PMAC_BACKLIGHT 212 static int pmu_set_backlight_level(int level, void* data); 213 static int pmu_set_backlight_enable(int on, int level, void* data); 214 #endif /* CONFIG_PMAC_BACKLIGHT */ 215 static void pmu_pass_intr(unsigned char *data, int len); 216 static int proc_get_batt(char *page, char **start, off_t off, 217 int count, int *eof, void *data); 218 static int proc_read_options(char *page, char **start, off_t off, 219 int count, int *eof, void *data); 220 static int proc_write_options(struct file *file, const char __user *buffer, 221 unsigned long count, void *data); 222 223 #ifdef CONFIG_ADB 224 struct adb_driver via_pmu_driver = { 225 "PMU", 226 pmu_probe, 227 pmu_init, 228 pmu_send_request, 229 pmu_adb_autopoll, 230 pmu_poll_adb, 231 pmu_adb_reset_bus 232 }; 233 #endif /* CONFIG_ADB */ 234 235 extern void low_sleep_handler(void); 236 extern void enable_kernel_altivec(void); 237 extern void enable_kernel_fp(void); 238 239 #ifdef DEBUG_SLEEP 240 int pmu_polled_request(struct adb_request *req); 241 int pmu_wink(struct adb_request *req); 242 #endif 243 244 /* 245 * This table indicates for each PMU opcode: 246 * - the number of data bytes to be sent with the command, or -1 247 * if a length byte should be sent, 248 * - the number of response bytes which the PMU will return, or 249 * -1 if it will send a length byte. 250 */ 251 static const s8 pmu_data_len[256][2] = { 252 /* 0 1 2 3 4 5 6 7 */ 253 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 254 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 255 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 256 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0}, 257 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0}, 258 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1}, 259 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 260 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0}, 261 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 262 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1}, 263 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0}, 264 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1}, 265 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 266 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1}, 267 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 268 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1}, 269 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 270 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 271 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 272 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 273 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0}, 274 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 275 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 276 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 277 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 278 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 279 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 280 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1}, 281 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0}, 282 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0}, 283 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, 284 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, 285 }; 286 287 static char *pbook_type[] = { 288 "Unknown PowerBook", 289 "PowerBook 2400/3400/3500(G3)", 290 "PowerBook G3 Series", 291 "1999 PowerBook G3", 292 "Core99" 293 }; 294 295 #ifdef CONFIG_PMAC_BACKLIGHT 296 static struct backlight_controller pmu_backlight_controller = { 297 pmu_set_backlight_enable, 298 pmu_set_backlight_level 299 }; 300 #endif /* CONFIG_PMAC_BACKLIGHT */ 301 302 int __init find_via_pmu(void) 303 { 304 u64 taddr; 305 u32 *reg; 306 307 if (via != 0) 308 return 1; 309 vias = of_find_node_by_name(NULL, "via-pmu"); 310 if (vias == NULL) 311 return 0; 312 313 reg = (u32 *)get_property(vias, "reg", NULL); 314 if (reg == NULL) { 315 printk(KERN_ERR "via-pmu: No \"reg\" property !\n"); 316 goto fail; 317 } 318 taddr = of_translate_address(vias, reg); 319 if (taddr == OF_BAD_ADDR) { 320 printk(KERN_ERR "via-pmu: Can't translate address !\n"); 321 goto fail; 322 } 323 324 spin_lock_init(&pmu_lock); 325 326 pmu_has_adb = 1; 327 328 pmu_intr_mask = PMU_INT_PCEJECT | 329 PMU_INT_SNDBRT | 330 PMU_INT_ADB | 331 PMU_INT_TICK; 332 333 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0) 334 || device_is_compatible(vias->parent, "ohare"))) 335 pmu_kind = PMU_OHARE_BASED; 336 else if (device_is_compatible(vias->parent, "paddington")) 337 pmu_kind = PMU_PADDINGTON_BASED; 338 else if (device_is_compatible(vias->parent, "heathrow")) 339 pmu_kind = PMU_HEATHROW_BASED; 340 else if (device_is_compatible(vias->parent, "Keylargo") 341 || device_is_compatible(vias->parent, "K2-Keylargo")) { 342 struct device_node *gpiop; 343 u64 gaddr = OF_BAD_ADDR; 344 345 pmu_kind = PMU_KEYLARGO_BASED; 346 pmu_has_adb = (find_type_devices("adb") != NULL); 347 pmu_intr_mask = PMU_INT_PCEJECT | 348 PMU_INT_SNDBRT | 349 PMU_INT_ADB | 350 PMU_INT_TICK | 351 PMU_INT_ENVIRONMENT; 352 353 gpiop = of_find_node_by_name(NULL, "gpio"); 354 if (gpiop) { 355 reg = (u32 *)get_property(gpiop, "reg", NULL); 356 if (reg) 357 gaddr = of_translate_address(gpiop, reg); 358 if (gaddr != OF_BAD_ADDR) 359 gpio_reg = ioremap(gaddr, 0x10); 360 } 361 if (gpio_reg == NULL) 362 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n"); 363 } else 364 pmu_kind = PMU_UNKNOWN; 365 366 via = ioremap(taddr, 0x2000); 367 if (via == NULL) { 368 printk(KERN_ERR "via-pmu: Can't map address !\n"); 369 goto fail; 370 } 371 372 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 373 out_8(&via[IFR], 0x7f); /* clear IFR */ 374 375 pmu_state = idle; 376 377 if (!init_pmu()) { 378 via = NULL; 379 return 0; 380 } 381 382 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n", 383 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version); 384 385 sys_ctrler = SYS_CTRLER_PMU; 386 387 return 1; 388 fail: 389 of_node_put(vias); 390 vias = NULL; 391 return 0; 392 } 393 394 #ifdef CONFIG_ADB 395 static int pmu_probe(void) 396 { 397 return vias == NULL? -ENODEV: 0; 398 } 399 400 static int __init pmu_init(void) 401 { 402 if (vias == NULL) 403 return -ENODEV; 404 return 0; 405 } 406 #endif /* CONFIG_ADB */ 407 408 /* 409 * We can't wait until pmu_init gets called, that happens too late. 410 * It happens after IDE and SCSI initialization, which can take a few 411 * seconds, and by that time the PMU could have given up on us and 412 * turned us off. 413 * Thus this is called with arch_initcall rather than device_initcall. 414 */ 415 static int __init via_pmu_start(void) 416 { 417 if (vias == NULL) 418 return -ENODEV; 419 420 bright_req_1.complete = 1; 421 bright_req_2.complete = 1; 422 batt_req.complete = 1; 423 424 #ifndef CONFIG_PPC_MERGE 425 if (pmu_kind == PMU_KEYLARGO_BASED) 426 openpic_set_irq_priority(vias->intrs[0].line, 427 OPENPIC_PRIORITY_DEFAULT + 1); 428 #endif 429 430 if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU", 431 (void *)0)) { 432 printk(KERN_ERR "VIA-PMU: can't get irq %d\n", 433 vias->intrs[0].line); 434 return -EAGAIN; 435 } 436 437 if (pmu_kind == PMU_KEYLARGO_BASED) { 438 gpio_node = of_find_node_by_name(NULL, "extint-gpio1"); 439 if (gpio_node == NULL) 440 gpio_node = of_find_node_by_name(NULL, 441 "pmu-interrupt"); 442 if (gpio_node && gpio_node->n_intrs > 0) 443 gpio_irq = gpio_node->intrs[0].line; 444 445 if (gpio_irq != -1) { 446 if (request_irq(gpio_irq, gpio1_interrupt, 0, 447 "GPIO1 ADB", (void *)0)) 448 printk(KERN_ERR "pmu: can't get irq %d" 449 " (GPIO1)\n", gpio_irq); 450 else 451 gpio_irq_enabled = 1; 452 } 453 } 454 455 /* Enable interrupts */ 456 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 457 458 pmu_fully_inited = 1; 459 460 /* Make sure PMU settle down before continuing. This is _very_ important 461 * since the IDE probe may shut interrupts down for quite a bit of time. If 462 * a PMU communication is pending while this happens, the PMU may timeout 463 * Not that on Core99 machines, the PMU keeps sending us environement 464 * messages, we should find a way to either fix IDE or make it call 465 * pmu_suspend() before masking interrupts. This can also happens while 466 * scolling with some fbdevs. 467 */ 468 do { 469 pmu_poll(); 470 } while (pmu_state != idle); 471 472 return 0; 473 } 474 475 arch_initcall(via_pmu_start); 476 477 /* 478 * This has to be done after pci_init, which is a subsys_initcall. 479 */ 480 static int __init via_pmu_dev_init(void) 481 { 482 if (vias == NULL) 483 return -ENODEV; 484 485 #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) || pmu_battery_count == 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 #ifdef CONFIG_PM 1809 1810 static LIST_HEAD(sleep_notifiers); 1811 1812 int 1813 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n) 1814 { 1815 struct list_head *list; 1816 struct pmu_sleep_notifier *notifier; 1817 1818 for (list = sleep_notifiers.next; list != &sleep_notifiers; 1819 list = list->next) { 1820 notifier = list_entry(list, struct pmu_sleep_notifier, list); 1821 if (n->priority > notifier->priority) 1822 break; 1823 } 1824 __list_add(&n->list, list->prev, list); 1825 return 0; 1826 } 1827 EXPORT_SYMBOL(pmu_register_sleep_notifier); 1828 1829 int 1830 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n) 1831 { 1832 if (n->list.next == 0) 1833 return -ENOENT; 1834 list_del(&n->list); 1835 n->list.next = NULL; 1836 return 0; 1837 } 1838 EXPORT_SYMBOL(pmu_unregister_sleep_notifier); 1839 #endif /* CONFIG_PM */ 1840 1841 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 1842 1843 /* Sleep is broadcast last-to-first */ 1844 static int 1845 broadcast_sleep(int when, int fallback) 1846 { 1847 int ret = PBOOK_SLEEP_OK; 1848 struct list_head *list; 1849 struct pmu_sleep_notifier *notifier; 1850 1851 for (list = sleep_notifiers.prev; list != &sleep_notifiers; 1852 list = list->prev) { 1853 notifier = list_entry(list, struct pmu_sleep_notifier, list); 1854 ret = notifier->notifier_call(notifier, when); 1855 if (ret != PBOOK_SLEEP_OK) { 1856 printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n", 1857 when, notifier, notifier->notifier_call); 1858 for (; list != &sleep_notifiers; list = list->next) { 1859 notifier = list_entry(list, struct pmu_sleep_notifier, list); 1860 notifier->notifier_call(notifier, fallback); 1861 } 1862 return ret; 1863 } 1864 } 1865 return ret; 1866 } 1867 1868 /* Wake is broadcast first-to-last */ 1869 static int 1870 broadcast_wake(void) 1871 { 1872 int ret = PBOOK_SLEEP_OK; 1873 struct list_head *list; 1874 struct pmu_sleep_notifier *notifier; 1875 1876 for (list = sleep_notifiers.next; list != &sleep_notifiers; 1877 list = list->next) { 1878 notifier = list_entry(list, struct pmu_sleep_notifier, list); 1879 notifier->notifier_call(notifier, PBOOK_WAKE); 1880 } 1881 return ret; 1882 } 1883 1884 /* 1885 * This struct is used to store config register values for 1886 * PCI devices which may get powered off when we sleep. 1887 */ 1888 static struct pci_save { 1889 #ifndef HACKED_PCI_SAVE 1890 u16 command; 1891 u16 cache_lat; 1892 u16 intr; 1893 u32 rom_address; 1894 #else 1895 u32 config[16]; 1896 #endif 1897 } *pbook_pci_saves; 1898 static int pbook_npci_saves; 1899 1900 static void 1901 pbook_alloc_pci_save(void) 1902 { 1903 int npci; 1904 struct pci_dev *pd = NULL; 1905 1906 npci = 0; 1907 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 1908 ++npci; 1909 } 1910 if (npci == 0) 1911 return; 1912 pbook_pci_saves = (struct pci_save *) 1913 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL); 1914 pbook_npci_saves = npci; 1915 } 1916 1917 static void 1918 pbook_free_pci_save(void) 1919 { 1920 if (pbook_pci_saves == NULL) 1921 return; 1922 kfree(pbook_pci_saves); 1923 pbook_pci_saves = NULL; 1924 pbook_npci_saves = 0; 1925 } 1926 1927 static void 1928 pbook_pci_save(void) 1929 { 1930 struct pci_save *ps = pbook_pci_saves; 1931 struct pci_dev *pd = NULL; 1932 int npci = pbook_npci_saves; 1933 1934 if (ps == NULL) 1935 return; 1936 1937 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 1938 if (npci-- == 0) 1939 return; 1940 #ifndef HACKED_PCI_SAVE 1941 pci_read_config_word(pd, PCI_COMMAND, &ps->command); 1942 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat); 1943 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr); 1944 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address); 1945 #else 1946 int i; 1947 for (i=1;i<16;i++) 1948 pci_read_config_dword(pd, i<<4, &ps->config[i]); 1949 #endif 1950 ++ps; 1951 } 1952 } 1953 1954 /* For this to work, we must take care of a few things: If gmac was enabled 1955 * during boot, it will be in the pci dev list. If it's disabled at this point 1956 * (and it will probably be), then you can't access it's config space. 1957 */ 1958 static void 1959 pbook_pci_restore(void) 1960 { 1961 u16 cmd; 1962 struct pci_save *ps = pbook_pci_saves - 1; 1963 struct pci_dev *pd = NULL; 1964 int npci = pbook_npci_saves; 1965 int j; 1966 1967 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { 1968 #ifdef HACKED_PCI_SAVE 1969 int i; 1970 if (npci-- == 0) 1971 return; 1972 ps++; 1973 for (i=2;i<16;i++) 1974 pci_write_config_dword(pd, i<<4, ps->config[i]); 1975 pci_write_config_dword(pd, 4, ps->config[1]); 1976 #else 1977 if (npci-- == 0) 1978 return; 1979 ps++; 1980 if (ps->command == 0) 1981 continue; 1982 pci_read_config_word(pd, PCI_COMMAND, &cmd); 1983 if ((ps->command & ~cmd) == 0) 1984 continue; 1985 switch (pd->hdr_type) { 1986 case PCI_HEADER_TYPE_NORMAL: 1987 for (j = 0; j < 6; ++j) 1988 pci_write_config_dword(pd, 1989 PCI_BASE_ADDRESS_0 + j*4, 1990 pd->resource[j].start); 1991 pci_write_config_dword(pd, PCI_ROM_ADDRESS, 1992 ps->rom_address); 1993 pci_write_config_word(pd, PCI_CACHE_LINE_SIZE, 1994 ps->cache_lat); 1995 pci_write_config_word(pd, PCI_INTERRUPT_LINE, 1996 ps->intr); 1997 pci_write_config_word(pd, PCI_COMMAND, ps->command); 1998 break; 1999 } 2000 #endif 2001 } 2002 } 2003 2004 #ifdef DEBUG_SLEEP 2005 /* N.B. This doesn't work on the 3400 */ 2006 void 2007 pmu_blink(int n) 2008 { 2009 struct adb_request req; 2010 2011 memset(&req, 0, sizeof(req)); 2012 2013 for (; n > 0; --n) { 2014 req.nbytes = 4; 2015 req.done = NULL; 2016 req.data[0] = 0xee; 2017 req.data[1] = 4; 2018 req.data[2] = 0; 2019 req.data[3] = 1; 2020 req.reply[0] = ADB_RET_OK; 2021 req.reply_len = 1; 2022 req.reply_expected = 0; 2023 pmu_polled_request(&req); 2024 mdelay(50); 2025 req.nbytes = 4; 2026 req.done = NULL; 2027 req.data[0] = 0xee; 2028 req.data[1] = 4; 2029 req.data[2] = 0; 2030 req.data[3] = 0; 2031 req.reply[0] = ADB_RET_OK; 2032 req.reply_len = 1; 2033 req.reply_expected = 0; 2034 pmu_polled_request(&req); 2035 mdelay(50); 2036 } 2037 mdelay(50); 2038 } 2039 #endif 2040 2041 /* 2042 * Put the powerbook to sleep. 2043 */ 2044 2045 static u32 save_via[8]; 2046 2047 static void 2048 save_via_state(void) 2049 { 2050 save_via[0] = in_8(&via[ANH]); 2051 save_via[1] = in_8(&via[DIRA]); 2052 save_via[2] = in_8(&via[B]); 2053 save_via[3] = in_8(&via[DIRB]); 2054 save_via[4] = in_8(&via[PCR]); 2055 save_via[5] = in_8(&via[ACR]); 2056 save_via[6] = in_8(&via[T1CL]); 2057 save_via[7] = in_8(&via[T1CH]); 2058 } 2059 static void 2060 restore_via_state(void) 2061 { 2062 out_8(&via[ANH], save_via[0]); 2063 out_8(&via[DIRA], save_via[1]); 2064 out_8(&via[B], save_via[2]); 2065 out_8(&via[DIRB], save_via[3]); 2066 out_8(&via[PCR], save_via[4]); 2067 out_8(&via[ACR], save_via[5]); 2068 out_8(&via[T1CL], save_via[6]); 2069 out_8(&via[T1CH], save_via[7]); 2070 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ 2071 out_8(&via[IFR], 0x7f); /* clear IFR */ 2072 out_8(&via[IER], IER_SET | SR_INT | CB1_INT); 2073 } 2074 2075 static int 2076 pmac_suspend_devices(void) 2077 { 2078 int ret; 2079 2080 pm_prepare_console(); 2081 2082 /* Notify old-style device drivers & userland */ 2083 ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT); 2084 if (ret != PBOOK_SLEEP_OK) { 2085 printk(KERN_ERR "Sleep rejected by drivers\n"); 2086 return -EBUSY; 2087 } 2088 2089 /* Sync the disks. */ 2090 /* XXX It would be nice to have some way to ensure that 2091 * nobody is dirtying any new buffers while we wait. That 2092 * could be achieved using the refrigerator for processes 2093 * that swsusp uses 2094 */ 2095 sys_sync(); 2096 2097 /* Sleep can fail now. May not be very robust but useful for debugging */ 2098 ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE); 2099 if (ret != PBOOK_SLEEP_OK) { 2100 printk(KERN_ERR "Driver sleep failed\n"); 2101 return -EBUSY; 2102 } 2103 2104 /* Send suspend call to devices, hold the device core's dpm_sem */ 2105 ret = device_suspend(PMSG_SUSPEND); 2106 if (ret) { 2107 broadcast_wake(); 2108 printk(KERN_ERR "Driver sleep failed\n"); 2109 return -EBUSY; 2110 } 2111 2112 /* Call platform functions marked "on sleep" */ 2113 pmac_pfunc_i2c_suspend(); 2114 pmac_pfunc_base_suspend(); 2115 2116 /* Stop preemption */ 2117 preempt_disable(); 2118 2119 /* Make sure the decrementer won't interrupt us */ 2120 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 2121 /* Make sure any pending DEC interrupt occurring while we did 2122 * the above didn't re-enable the DEC */ 2123 mb(); 2124 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 2125 2126 /* We can now disable MSR_EE. This code of course works properly only 2127 * on UP machines... For SMP, if we ever implement sleep, we'll have to 2128 * stop the "other" CPUs way before we do all that stuff. 2129 */ 2130 local_irq_disable(); 2131 2132 /* Broadcast power down irq 2133 * This isn't that useful in most cases (only directly wired devices can 2134 * use this but still... This will take care of sysdev's as well, so 2135 * we exit from here with local irqs disabled and PIC off. 2136 */ 2137 ret = device_power_down(PMSG_SUSPEND); 2138 if (ret) { 2139 wakeup_decrementer(); 2140 local_irq_enable(); 2141 preempt_enable(); 2142 device_resume(); 2143 broadcast_wake(); 2144 printk(KERN_ERR "Driver powerdown failed\n"); 2145 return -EBUSY; 2146 } 2147 2148 /* Wait for completion of async backlight requests */ 2149 while (!bright_req_1.complete || !bright_req_2.complete || 2150 !batt_req.complete) 2151 pmu_poll(); 2152 2153 /* Giveup the lazy FPU & vec so we don't have to back them 2154 * up from the low level code 2155 */ 2156 enable_kernel_fp(); 2157 2158 #ifdef CONFIG_ALTIVEC 2159 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 2160 enable_kernel_altivec(); 2161 #endif /* CONFIG_ALTIVEC */ 2162 2163 return 0; 2164 } 2165 2166 static int 2167 pmac_wakeup_devices(void) 2168 { 2169 mdelay(100); 2170 2171 /* Power back up system devices (including the PIC) */ 2172 device_power_up(); 2173 2174 /* Force a poll of ADB interrupts */ 2175 adb_int_pending = 1; 2176 via_pmu_interrupt(0, NULL, NULL); 2177 2178 /* Restart jiffies & scheduling */ 2179 wakeup_decrementer(); 2180 2181 /* Re-enable local CPU interrupts */ 2182 local_irq_enable(); 2183 mdelay(10); 2184 preempt_enable(); 2185 2186 /* Call platform functions marked "on wake" */ 2187 pmac_pfunc_base_resume(); 2188 pmac_pfunc_i2c_resume(); 2189 2190 /* Resume devices */ 2191 device_resume(); 2192 2193 /* Notify old style drivers */ 2194 broadcast_wake(); 2195 2196 pm_restore_console(); 2197 2198 return 0; 2199 } 2200 2201 #define GRACKLE_PM (1<<7) 2202 #define GRACKLE_DOZE (1<<5) 2203 #define GRACKLE_NAP (1<<4) 2204 #define GRACKLE_SLEEP (1<<3) 2205 2206 static int powerbook_sleep_grackle(void) 2207 { 2208 unsigned long save_l2cr; 2209 unsigned short pmcr1; 2210 struct adb_request req; 2211 int ret; 2212 struct pci_dev *grackle; 2213 2214 grackle = pci_find_slot(0, 0); 2215 if (!grackle) 2216 return -ENODEV; 2217 2218 ret = pmac_suspend_devices(); 2219 if (ret) { 2220 printk(KERN_ERR "Sleep rejected by devices\n"); 2221 return ret; 2222 } 2223 2224 /* Turn off various things. Darwin does some retry tests here... */ 2225 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE); 2226 pmu_wait_complete(&req); 2227 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 2228 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY); 2229 pmu_wait_complete(&req); 2230 2231 /* For 750, save backside cache setting and disable it */ 2232 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 2233 2234 if (!__fake_sleep) { 2235 /* Ask the PMU to put us to sleep */ 2236 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2237 pmu_wait_complete(&req); 2238 } 2239 2240 /* The VIA is supposed not to be restored correctly*/ 2241 save_via_state(); 2242 /* We shut down some HW */ 2243 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 2244 2245 pci_read_config_word(grackle, 0x70, &pmcr1); 2246 /* Apparently, MacOS uses NAP mode for Grackle ??? */ 2247 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 2248 pmcr1 |= GRACKLE_PM|GRACKLE_NAP; 2249 pci_write_config_word(grackle, 0x70, pmcr1); 2250 2251 /* Call low-level ASM sleep handler */ 2252 if (__fake_sleep) 2253 mdelay(5000); 2254 else 2255 low_sleep_handler(); 2256 2257 /* We're awake again, stop grackle PM */ 2258 pci_read_config_word(grackle, 0x70, &pmcr1); 2259 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 2260 pci_write_config_word(grackle, 0x70, pmcr1); 2261 2262 /* Make sure the PMU is idle */ 2263 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 2264 restore_via_state(); 2265 2266 /* Restore L2 cache */ 2267 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2268 _set_L2CR(save_l2cr); 2269 2270 /* Restore userland MMU context */ 2271 set_context(current->active_mm->context, current->active_mm->pgd); 2272 2273 /* Power things up */ 2274 pmu_unlock(); 2275 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2276 pmu_wait_complete(&req); 2277 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, 2278 PMU_POW0_ON|PMU_POW0_HARD_DRIVE); 2279 pmu_wait_complete(&req); 2280 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, 2281 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY); 2282 pmu_wait_complete(&req); 2283 2284 pmac_wakeup_devices(); 2285 2286 return 0; 2287 } 2288 2289 static int 2290 powerbook_sleep_Core99(void) 2291 { 2292 unsigned long save_l2cr; 2293 unsigned long save_l3cr; 2294 struct adb_request req; 2295 int ret; 2296 2297 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) { 2298 printk(KERN_ERR "Sleep mode not supported on this machine\n"); 2299 return -ENOSYS; 2300 } 2301 2302 if (num_online_cpus() > 1 || cpu_is_offline(0)) 2303 return -EAGAIN; 2304 2305 ret = pmac_suspend_devices(); 2306 if (ret) { 2307 printk(KERN_ERR "Sleep rejected by devices\n"); 2308 return ret; 2309 } 2310 2311 /* Stop environment and ADB interrupts */ 2312 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); 2313 pmu_wait_complete(&req); 2314 2315 /* Tell PMU what events will wake us up */ 2316 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS, 2317 0xff, 0xff); 2318 pmu_wait_complete(&req); 2319 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS, 2320 0, PMU_PWR_WAKEUP_KEY | 2321 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0)); 2322 pmu_wait_complete(&req); 2323 2324 /* Save the state of the L2 and L3 caches */ 2325 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */ 2326 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ 2327 2328 if (!__fake_sleep) { 2329 /* Ask the PMU to put us to sleep */ 2330 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2331 pmu_wait_complete(&req); 2332 } 2333 2334 /* The VIA is supposed not to be restored correctly*/ 2335 save_via_state(); 2336 2337 /* Shut down various ASICs. There's a chance that we can no longer 2338 * talk to the PMU after this, so I moved it to _after_ sending the 2339 * sleep command to it. Still need to be checked. 2340 */ 2341 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); 2342 2343 /* Call low-level ASM sleep handler */ 2344 if (__fake_sleep) 2345 mdelay(5000); 2346 else 2347 low_sleep_handler(); 2348 2349 /* Restore Apple core ASICs state */ 2350 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); 2351 2352 /* Restore VIA */ 2353 restore_via_state(); 2354 2355 /* tweak LPJ before cpufreq is there */ 2356 loops_per_jiffy *= 2; 2357 2358 /* Restore video */ 2359 pmac_call_early_video_resume(); 2360 2361 /* Restore L2 cache */ 2362 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) 2363 _set_L2CR(save_l2cr); 2364 /* Restore L3 cache */ 2365 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0) 2366 _set_L3CR(save_l3cr); 2367 2368 /* Restore userland MMU context */ 2369 set_context(current->active_mm->context, current->active_mm->pgd); 2370 2371 /* Tell PMU we are ready */ 2372 pmu_unlock(); 2373 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2374 pmu_wait_complete(&req); 2375 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); 2376 pmu_wait_complete(&req); 2377 2378 /* Restore LPJ, cpufreq will adjust the cpu frequency */ 2379 loops_per_jiffy /= 2; 2380 2381 pmac_wakeup_devices(); 2382 2383 return 0; 2384 } 2385 2386 #define PB3400_MEM_CTRL 0xf8000000 2387 #define PB3400_MEM_CTRL_SLEEP 0x70 2388 2389 static int 2390 powerbook_sleep_3400(void) 2391 { 2392 int ret, i, x; 2393 unsigned int hid0; 2394 unsigned long p; 2395 struct adb_request sleep_req; 2396 void __iomem *mem_ctrl; 2397 unsigned int __iomem *mem_ctrl_sleep; 2398 2399 /* first map in the memory controller registers */ 2400 mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100); 2401 if (mem_ctrl == NULL) { 2402 printk("powerbook_sleep_3400: ioremap failed\n"); 2403 return -ENOMEM; 2404 } 2405 mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP; 2406 2407 /* Allocate room for PCI save */ 2408 pbook_alloc_pci_save(); 2409 2410 ret = pmac_suspend_devices(); 2411 if (ret) { 2412 pbook_free_pci_save(); 2413 printk(KERN_ERR "Sleep rejected by devices\n"); 2414 return ret; 2415 } 2416 2417 /* Save the state of PCI config space for some slots */ 2418 pbook_pci_save(); 2419 2420 /* Set the memory controller to keep the memory refreshed 2421 while we're asleep */ 2422 for (i = 0x403f; i >= 0x4000; --i) { 2423 out_be32(mem_ctrl_sleep, i); 2424 do { 2425 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff; 2426 } while (x == 0); 2427 if (x >= 0x100) 2428 break; 2429 } 2430 2431 /* Ask the PMU to put us to sleep */ 2432 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); 2433 while (!sleep_req.complete) 2434 mb(); 2435 2436 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); 2437 2438 /* displacement-flush the L2 cache - necessary? */ 2439 for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000) 2440 i = *(volatile int *)p; 2441 asleep = 1; 2442 2443 /* Put the CPU into sleep mode */ 2444 hid0 = mfspr(SPRN_HID0); 2445 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP; 2446 mtspr(SPRN_HID0, hid0); 2447 mtmsr(mfmsr() | MSR_POW | MSR_EE); 2448 udelay(10); 2449 2450 /* OK, we're awake again, start restoring things */ 2451 out_be32(mem_ctrl_sleep, 0x3f); 2452 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); 2453 pbook_pci_restore(); 2454 pmu_unlock(); 2455 2456 /* wait for the PMU interrupt sequence to complete */ 2457 while (asleep) 2458 mb(); 2459 2460 pmac_wakeup_devices(); 2461 pbook_free_pci_save(); 2462 iounmap(mem_ctrl); 2463 2464 return 0; 2465 } 2466 2467 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2468 2469 /* 2470 * Support for /dev/pmu device 2471 */ 2472 #define RB_SIZE 0x10 2473 struct pmu_private { 2474 struct list_head list; 2475 int rb_get; 2476 int rb_put; 2477 struct rb_entry { 2478 unsigned short len; 2479 unsigned char data[16]; 2480 } rb_buf[RB_SIZE]; 2481 wait_queue_head_t wait; 2482 spinlock_t lock; 2483 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2484 int backlight_locker; 2485 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 2486 }; 2487 2488 static LIST_HEAD(all_pmu_pvt); 2489 static DEFINE_SPINLOCK(all_pvt_lock); 2490 2491 static void 2492 pmu_pass_intr(unsigned char *data, int len) 2493 { 2494 struct pmu_private *pp; 2495 struct list_head *list; 2496 int i; 2497 unsigned long flags; 2498 2499 if (len > sizeof(pp->rb_buf[0].data)) 2500 len = sizeof(pp->rb_buf[0].data); 2501 spin_lock_irqsave(&all_pvt_lock, flags); 2502 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) { 2503 pp = list_entry(list, struct pmu_private, list); 2504 spin_lock(&pp->lock); 2505 i = pp->rb_put + 1; 2506 if (i >= RB_SIZE) 2507 i = 0; 2508 if (i != pp->rb_get) { 2509 struct rb_entry *rp = &pp->rb_buf[pp->rb_put]; 2510 rp->len = len; 2511 memcpy(rp->data, data, len); 2512 pp->rb_put = i; 2513 wake_up_interruptible(&pp->wait); 2514 } 2515 spin_unlock(&pp->lock); 2516 } 2517 spin_unlock_irqrestore(&all_pvt_lock, flags); 2518 } 2519 2520 static int 2521 pmu_open(struct inode *inode, struct file *file) 2522 { 2523 struct pmu_private *pp; 2524 unsigned long flags; 2525 2526 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL); 2527 if (pp == 0) 2528 return -ENOMEM; 2529 pp->rb_get = pp->rb_put = 0; 2530 spin_lock_init(&pp->lock); 2531 init_waitqueue_head(&pp->wait); 2532 spin_lock_irqsave(&all_pvt_lock, flags); 2533 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2534 pp->backlight_locker = 0; 2535 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 2536 list_add(&pp->list, &all_pmu_pvt); 2537 spin_unlock_irqrestore(&all_pvt_lock, flags); 2538 file->private_data = pp; 2539 return 0; 2540 } 2541 2542 static ssize_t 2543 pmu_read(struct file *file, char __user *buf, 2544 size_t count, loff_t *ppos) 2545 { 2546 struct pmu_private *pp = file->private_data; 2547 DECLARE_WAITQUEUE(wait, current); 2548 unsigned long flags; 2549 int ret = 0; 2550 2551 if (count < 1 || pp == 0) 2552 return -EINVAL; 2553 if (!access_ok(VERIFY_WRITE, buf, count)) 2554 return -EFAULT; 2555 2556 spin_lock_irqsave(&pp->lock, flags); 2557 add_wait_queue(&pp->wait, &wait); 2558 current->state = TASK_INTERRUPTIBLE; 2559 2560 for (;;) { 2561 ret = -EAGAIN; 2562 if (pp->rb_get != pp->rb_put) { 2563 int i = pp->rb_get; 2564 struct rb_entry *rp = &pp->rb_buf[i]; 2565 ret = rp->len; 2566 spin_unlock_irqrestore(&pp->lock, flags); 2567 if (ret > count) 2568 ret = count; 2569 if (ret > 0 && copy_to_user(buf, rp->data, ret)) 2570 ret = -EFAULT; 2571 if (++i >= RB_SIZE) 2572 i = 0; 2573 spin_lock_irqsave(&pp->lock, flags); 2574 pp->rb_get = i; 2575 } 2576 if (ret >= 0) 2577 break; 2578 if (file->f_flags & O_NONBLOCK) 2579 break; 2580 ret = -ERESTARTSYS; 2581 if (signal_pending(current)) 2582 break; 2583 spin_unlock_irqrestore(&pp->lock, flags); 2584 schedule(); 2585 spin_lock_irqsave(&pp->lock, flags); 2586 } 2587 current->state = TASK_RUNNING; 2588 remove_wait_queue(&pp->wait, &wait); 2589 spin_unlock_irqrestore(&pp->lock, flags); 2590 2591 return ret; 2592 } 2593 2594 static ssize_t 2595 pmu_write(struct file *file, const char __user *buf, 2596 size_t count, loff_t *ppos) 2597 { 2598 return 0; 2599 } 2600 2601 static unsigned int 2602 pmu_fpoll(struct file *filp, poll_table *wait) 2603 { 2604 struct pmu_private *pp = filp->private_data; 2605 unsigned int mask = 0; 2606 unsigned long flags; 2607 2608 if (pp == 0) 2609 return 0; 2610 poll_wait(filp, &pp->wait, wait); 2611 spin_lock_irqsave(&pp->lock, flags); 2612 if (pp->rb_get != pp->rb_put) 2613 mask |= POLLIN; 2614 spin_unlock_irqrestore(&pp->lock, flags); 2615 return mask; 2616 } 2617 2618 static int 2619 pmu_release(struct inode *inode, struct file *file) 2620 { 2621 struct pmu_private *pp = file->private_data; 2622 unsigned long flags; 2623 2624 lock_kernel(); 2625 if (pp != 0) { 2626 file->private_data = NULL; 2627 spin_lock_irqsave(&all_pvt_lock, flags); 2628 list_del(&pp->list); 2629 spin_unlock_irqrestore(&all_pvt_lock, flags); 2630 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) 2631 if (pp->backlight_locker) { 2632 spin_lock_irqsave(&pmu_lock, flags); 2633 disable_kernel_backlight--; 2634 spin_unlock_irqrestore(&pmu_lock, flags); 2635 } 2636 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */ 2637 kfree(pp); 2638 } 2639 unlock_kernel(); 2640 return 0; 2641 } 2642 2643 static int 2644 pmu_ioctl(struct inode * inode, struct file *filp, 2645 u_int cmd, u_long arg) 2646 { 2647 __u32 __user *argp = (__u32 __user *)arg; 2648 int error = -EINVAL; 2649 2650 switch (cmd) { 2651 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2652 case PMU_IOC_SLEEP: 2653 if (!capable(CAP_SYS_ADMIN)) 2654 return -EACCES; 2655 if (sleep_in_progress) 2656 return -EBUSY; 2657 sleep_in_progress = 1; 2658 switch (pmu_kind) { 2659 case PMU_OHARE_BASED: 2660 error = powerbook_sleep_3400(); 2661 break; 2662 case PMU_HEATHROW_BASED: 2663 case PMU_PADDINGTON_BASED: 2664 error = powerbook_sleep_grackle(); 2665 break; 2666 case PMU_KEYLARGO_BASED: 2667 error = powerbook_sleep_Core99(); 2668 break; 2669 default: 2670 error = -ENOSYS; 2671 } 2672 sleep_in_progress = 0; 2673 break; 2674 case PMU_IOC_CAN_SLEEP: 2675 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) 2676 return put_user(0, argp); 2677 else 2678 return put_user(1, argp); 2679 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2680 2681 #ifdef CONFIG_PMAC_BACKLIGHT 2682 /* Backlight should have its own device or go via 2683 * the fbdev 2684 */ 2685 case PMU_IOC_GET_BACKLIGHT: 2686 if (sleep_in_progress) 2687 return -EBUSY; 2688 error = get_backlight_level(); 2689 if (error < 0) 2690 return error; 2691 return put_user(error, argp); 2692 case PMU_IOC_SET_BACKLIGHT: 2693 { 2694 __u32 value; 2695 if (sleep_in_progress) 2696 return -EBUSY; 2697 error = get_user(value, argp); 2698 if (!error) 2699 error = set_backlight_level(value); 2700 break; 2701 } 2702 #ifdef CONFIG_INPUT_ADBHID 2703 case PMU_IOC_GRAB_BACKLIGHT: { 2704 struct pmu_private *pp = filp->private_data; 2705 unsigned long flags; 2706 2707 if (pp->backlight_locker) 2708 return 0; 2709 pp->backlight_locker = 1; 2710 spin_lock_irqsave(&pmu_lock, flags); 2711 disable_kernel_backlight++; 2712 spin_unlock_irqrestore(&pmu_lock, flags); 2713 return 0; 2714 } 2715 #endif /* CONFIG_INPUT_ADBHID */ 2716 #endif /* CONFIG_PMAC_BACKLIGHT */ 2717 case PMU_IOC_GET_MODEL: 2718 return put_user(pmu_kind, argp); 2719 case PMU_IOC_HAS_ADB: 2720 return put_user(pmu_has_adb, argp); 2721 } 2722 return error; 2723 } 2724 2725 static struct file_operations pmu_device_fops = { 2726 .read = pmu_read, 2727 .write = pmu_write, 2728 .poll = pmu_fpoll, 2729 .ioctl = pmu_ioctl, 2730 .open = pmu_open, 2731 .release = pmu_release, 2732 }; 2733 2734 static struct miscdevice pmu_device = { 2735 PMU_MINOR, "pmu", &pmu_device_fops 2736 }; 2737 2738 static int pmu_device_init(void) 2739 { 2740 if (!via) 2741 return 0; 2742 if (misc_register(&pmu_device) < 0) 2743 printk(KERN_ERR "via-pmu: cannot register misc device.\n"); 2744 return 0; 2745 } 2746 device_initcall(pmu_device_init); 2747 2748 2749 #ifdef DEBUG_SLEEP 2750 static inline void 2751 polled_handshake(volatile unsigned char __iomem *via) 2752 { 2753 via[B] &= ~TREQ; eieio(); 2754 while ((via[B] & TACK) != 0) 2755 ; 2756 via[B] |= TREQ; eieio(); 2757 while ((via[B] & TACK) == 0) 2758 ; 2759 } 2760 2761 static inline void 2762 polled_send_byte(volatile unsigned char __iomem *via, int x) 2763 { 2764 via[ACR] |= SR_OUT | SR_EXT; eieio(); 2765 via[SR] = x; eieio(); 2766 polled_handshake(via); 2767 } 2768 2769 static inline int 2770 polled_recv_byte(volatile unsigned char __iomem *via) 2771 { 2772 int x; 2773 2774 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio(); 2775 x = via[SR]; eieio(); 2776 polled_handshake(via); 2777 x = via[SR]; eieio(); 2778 return x; 2779 } 2780 2781 int 2782 pmu_polled_request(struct adb_request *req) 2783 { 2784 unsigned long flags; 2785 int i, l, c; 2786 volatile unsigned char __iomem *v = via; 2787 2788 req->complete = 1; 2789 c = req->data[0]; 2790 l = pmu_data_len[c][0]; 2791 if (l >= 0 && req->nbytes != l + 1) 2792 return -EINVAL; 2793 2794 local_irq_save(flags); 2795 while (pmu_state != idle) 2796 pmu_poll(); 2797 2798 while ((via[B] & TACK) == 0) 2799 ; 2800 polled_send_byte(v, c); 2801 if (l < 0) { 2802 l = req->nbytes - 1; 2803 polled_send_byte(v, l); 2804 } 2805 for (i = 1; i <= l; ++i) 2806 polled_send_byte(v, req->data[i]); 2807 2808 l = pmu_data_len[c][1]; 2809 if (l < 0) 2810 l = polled_recv_byte(v); 2811 for (i = 0; i < l; ++i) 2812 req->reply[i + req->reply_len] = polled_recv_byte(v); 2813 2814 if (req->done) 2815 (*req->done)(req); 2816 2817 local_irq_restore(flags); 2818 return 0; 2819 } 2820 #endif /* DEBUG_SLEEP */ 2821 2822 2823 /* FIXME: This is a temporary set of callbacks to enable us 2824 * to do suspend-to-disk. 2825 */ 2826 2827 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2828 2829 static int pmu_sys_suspended = 0; 2830 2831 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state) 2832 { 2833 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended) 2834 return 0; 2835 2836 /* Suspend PMU event interrupts */ 2837 pmu_suspend(); 2838 2839 pmu_sys_suspended = 1; 2840 return 0; 2841 } 2842 2843 static int pmu_sys_resume(struct sys_device *sysdev) 2844 { 2845 struct adb_request req; 2846 2847 if (!pmu_sys_suspended) 2848 return 0; 2849 2850 /* Tell PMU we are ready */ 2851 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); 2852 pmu_wait_complete(&req); 2853 2854 /* Resume PMU event interrupts */ 2855 pmu_resume(); 2856 2857 pmu_sys_suspended = 0; 2858 2859 return 0; 2860 } 2861 2862 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2863 2864 static struct sysdev_class pmu_sysclass = { 2865 set_kset_name("pmu"), 2866 }; 2867 2868 static struct sys_device device_pmu = { 2869 .id = 0, 2870 .cls = &pmu_sysclass, 2871 }; 2872 2873 static struct sysdev_driver driver_pmu = { 2874 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2875 .suspend = &pmu_sys_suspend, 2876 .resume = &pmu_sys_resume, 2877 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2878 }; 2879 2880 static int __init init_pmu_sysfs(void) 2881 { 2882 int rc; 2883 2884 rc = sysdev_class_register(&pmu_sysclass); 2885 if (rc) { 2886 printk(KERN_ERR "Failed registering PMU sys class\n"); 2887 return -ENODEV; 2888 } 2889 rc = sysdev_register(&device_pmu); 2890 if (rc) { 2891 printk(KERN_ERR "Failed registering PMU sys device\n"); 2892 return -ENODEV; 2893 } 2894 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu); 2895 if (rc) { 2896 printk(KERN_ERR "Failed registering PMU sys driver\n"); 2897 return -ENODEV; 2898 } 2899 return 0; 2900 } 2901 2902 subsys_initcall(init_pmu_sysfs); 2903 2904 EXPORT_SYMBOL(pmu_request); 2905 EXPORT_SYMBOL(pmu_queue_request); 2906 EXPORT_SYMBOL(pmu_poll); 2907 EXPORT_SYMBOL(pmu_poll_adb); 2908 EXPORT_SYMBOL(pmu_wait_complete); 2909 EXPORT_SYMBOL(pmu_suspend); 2910 EXPORT_SYMBOL(pmu_resume); 2911 EXPORT_SYMBOL(pmu_unlock); 2912 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 2913 EXPORT_SYMBOL(pmu_enable_irled); 2914 EXPORT_SYMBOL(pmu_battery_count); 2915 EXPORT_SYMBOL(pmu_batteries); 2916 EXPORT_SYMBOL(pmu_power_flags); 2917 #endif /* CONFIG_PM && CONFIG_PPC32 */ 2918 2919