2 * Device driver for the via-pmu on Apple Powermacs.
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.
11 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
12 * Copyright (C) 2001-2002 Benjamin Herrenschmidt
13 * Copyright (C) 2006-2007 Johannes Berg
15 * THIS DRIVER IS BECOMING A TOTAL MESS !
16 * - Cleanup atomically disabling reply to PMU events after
17 * a sleep or a freq. switch
21 #include <linux/smp_lock.h>
22 #include <linux/types.h>
23 #include <linux/errno.h>
24 #include <linux/kernel.h>
25 #include <linux/delay.h>
26 #include <linux/sched.h>
27 #include <linux/miscdevice.h>
28 #include <linux/blkdev.h>
29 #include <linux/pci.h>
30 #include <linux/slab.h>
31 #include <linux/poll.h>
32 #include <linux/adb.h>
33 #include <linux/pmu.h>
34 #include <linux/cuda.h>
35 #include <linux/module.h>
36 #include <linux/spinlock.h>
38 #include <linux/proc_fs.h>
39 #include <linux/seq_file.h>
40 #include <linux/init.h>
41 #include <linux/interrupt.h>
42 #include <linux/device.h>
43 #include <linux/sysdev.h>
44 #include <linux/freezer.h>
45 #include <linux/syscalls.h>
46 #include <linux/suspend.h>
47 #include <linux/cpu.h>
49 #include <asm/machdep.h>
51 #include <asm/pgtable.h>
52 #include <asm/system.h>
53 #include <asm/sections.h>
55 #include <asm/pmac_feature.h>
56 #include <asm/pmac_pfunc.h>
57 #include <asm/pmac_low_i2c.h>
58 #include <asm/uaccess.h>
59 #include <asm/mmu_context.h>
60 #include <asm/cputable.h>
62 #include <asm/backlight.h>
64 #include "via-pmu-event.h"
66 /* Some compile options */
69 /* Misc minor number allocated for /dev/pmu */
72 /* How many iterations between battery polls */
73 #define BATTERY_POLLING_COUNT 2
75 static volatile unsigned char __iomem *via;
77 /* VIA registers - spaced 0x200 bytes apart */
78 #define RS 0x200 /* skip between registers */
79 #define B 0 /* B-side data */
80 #define A RS /* A-side data */
81 #define DIRB (2*RS) /* B-side direction (1=output) */
82 #define DIRA (3*RS) /* A-side direction (1=output) */
83 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
84 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
85 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
86 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
87 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
88 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
89 #define SR (10*RS) /* Shift register */
90 #define ACR (11*RS) /* Auxiliary control register */
91 #define PCR (12*RS) /* Peripheral control register */
92 #define IFR (13*RS) /* Interrupt flag register */
93 #define IER (14*RS) /* Interrupt enable register */
94 #define ANH (15*RS) /* A-side data, no handshake */
96 /* Bits in B data register: both active low */
97 #define TACK 0x08 /* Transfer acknowledge (input) */
98 #define TREQ 0x10 /* Transfer request (output) */
101 #define SR_CTRL 0x1c /* Shift register control bits */
102 #define SR_EXT 0x0c /* Shift on external clock */
103 #define SR_OUT 0x10 /* Shift out if 1 */
105 /* Bits in IFR and IER */
106 #define IER_SET 0x80 /* set bits in IER */
107 #define IER_CLR 0 /* clear bits in IER */
108 #define SR_INT 0x04 /* Shift register full/empty */
110 #define CB1_INT 0x10 /* transition on CB1 input */
112 static volatile enum pmu_state {
121 static volatile enum int_data_state {
126 } int_data_state[2] = { int_data_empty, int_data_empty };
128 static struct adb_request *current_req;
129 static struct adb_request *last_req;
130 static struct adb_request *req_awaiting_reply;
131 static unsigned char interrupt_data[2][32];
132 static int interrupt_data_len[2];
133 static int int_data_last;
134 static unsigned char *reply_ptr;
135 static int data_index;
137 static volatile int adb_int_pending;
138 static volatile int disable_poll;
139 static struct device_node *vias;
140 static int pmu_kind = PMU_UNKNOWN;
141 static int pmu_fully_inited;
142 static int pmu_has_adb;
143 static struct device_node *gpio_node;
144 static unsigned char __iomem *gpio_reg;
145 static int gpio_irq = NO_IRQ;
146 static int gpio_irq_enabled = -1;
147 static volatile int pmu_suspended;
148 static spinlock_t pmu_lock;
149 static u8 pmu_intr_mask;
150 static int pmu_version;
151 static int drop_interrupts;
152 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
153 static int option_lid_wakeup = 1;
154 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
155 static unsigned long async_req_locks;
156 static unsigned int pmu_irq_stats[11];
158 static struct proc_dir_entry *proc_pmu_root;
159 static struct proc_dir_entry *proc_pmu_info;
160 static struct proc_dir_entry *proc_pmu_irqstats;
161 static struct proc_dir_entry *proc_pmu_options;
162 static int option_server_mode;
164 int pmu_battery_count;
166 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
167 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
168 static int query_batt_timer = BATTERY_POLLING_COUNT;
169 static struct adb_request batt_req;
170 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
176 static int adb_dev_map;
177 static int pmu_adb_flags;
179 static int pmu_probe(void);
180 static int pmu_init(void);
181 static int pmu_send_request(struct adb_request *req, int sync);
182 static int pmu_adb_autopoll(int devs);
183 static int pmu_adb_reset_bus(void);
184 #endif /* CONFIG_ADB */
186 static int init_pmu(void);
187 static void pmu_start(void);
188 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
189 static irqreturn_t gpio1_interrupt(int irq, void *arg);
190 static const struct file_operations pmu_info_proc_fops;
191 static const struct file_operations pmu_irqstats_proc_fops;
192 static void pmu_pass_intr(unsigned char *data, int len);
193 static const struct file_operations pmu_battery_proc_fops;
194 static const struct file_operations pmu_options_proc_fops;
197 struct adb_driver via_pmu_driver = {
206 #endif /* CONFIG_ADB */
208 extern void low_sleep_handler(void);
209 extern void enable_kernel_altivec(void);
210 extern void enable_kernel_fp(void);
213 int pmu_polled_request(struct adb_request *req);
214 void pmu_blink(int n);
218 * This table indicates for each PMU opcode:
219 * - the number of data bytes to be sent with the command, or -1
220 * if a length byte should be sent,
221 * - the number of response bytes which the PMU will return, or
222 * -1 if it will send a length byte.
224 static const s8 pmu_data_len[256][2] = {
225 /* 0 1 2 3 4 5 6 7 */
226 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
227 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
228 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
229 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
230 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
231 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
232 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
233 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
234 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
235 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
236 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
237 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
238 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
239 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
240 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
241 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
242 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
243 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
244 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
245 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
246 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
247 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
248 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
249 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
250 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
251 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
252 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
253 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
254 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
255 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
256 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
257 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
260 static char *pbook_type[] = {
262 "PowerBook 2400/3400/3500(G3)",
263 "PowerBook G3 Series",
268 int __init find_via_pmu(void)
275 vias = of_find_node_by_name(NULL, "via-pmu");
279 reg = of_get_property(vias, "reg", NULL);
281 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
284 taddr = of_translate_address(vias, reg);
285 if (taddr == OF_BAD_ADDR) {
286 printk(KERN_ERR "via-pmu: Can't translate address !\n");
290 spin_lock_init(&pmu_lock);
294 pmu_intr_mask = PMU_INT_PCEJECT |
299 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
300 || of_device_is_compatible(vias->parent, "ohare")))
301 pmu_kind = PMU_OHARE_BASED;
302 else if (of_device_is_compatible(vias->parent, "paddington"))
303 pmu_kind = PMU_PADDINGTON_BASED;
304 else if (of_device_is_compatible(vias->parent, "heathrow"))
305 pmu_kind = PMU_HEATHROW_BASED;
306 else if (of_device_is_compatible(vias->parent, "Keylargo")
307 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
308 struct device_node *gpiop;
309 struct device_node *adbp;
310 u64 gaddr = OF_BAD_ADDR;
312 pmu_kind = PMU_KEYLARGO_BASED;
313 adbp = of_find_node_by_type(NULL, "adb");
314 pmu_has_adb = (adbp != NULL);
316 pmu_intr_mask = PMU_INT_PCEJECT |
322 gpiop = of_find_node_by_name(NULL, "gpio");
324 reg = of_get_property(gpiop, "reg", NULL);
326 gaddr = of_translate_address(gpiop, reg);
327 if (gaddr != OF_BAD_ADDR)
328 gpio_reg = ioremap(gaddr, 0x10);
330 if (gpio_reg == NULL) {
331 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
335 pmu_kind = PMU_UNKNOWN;
337 via = ioremap(taddr, 0x2000);
339 printk(KERN_ERR "via-pmu: Can't map address !\n");
343 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
344 out_8(&via[IFR], 0x7f); /* clear IFR */
353 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
354 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
356 sys_ctrler = SYS_CTRLER_PMU;
369 static int pmu_probe(void)
371 return vias == NULL? -ENODEV: 0;
374 static int __init pmu_init(void)
380 #endif /* CONFIG_ADB */
383 * We can't wait until pmu_init gets called, that happens too late.
384 * It happens after IDE and SCSI initialization, which can take a few
385 * seconds, and by that time the PMU could have given up on us and
387 * Thus this is called with arch_initcall rather than device_initcall.
389 static int __init via_pmu_start(void)
396 batt_req.complete = 1;
398 irq = irq_of_parse_and_map(vias, 0);
400 printk(KERN_ERR "via-pmu: can't map interrupt\n");
403 /* We set IRQF_NO_SUSPEND because we don't want the interrupt
404 * to be disabled between the 2 passes of driver suspend, we
405 * control our own disabling for that one
407 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
408 "VIA-PMU", (void *)0)) {
409 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
413 if (pmu_kind == PMU_KEYLARGO_BASED) {
414 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
415 if (gpio_node == NULL)
416 gpio_node = of_find_node_by_name(NULL,
419 gpio_irq = irq_of_parse_and_map(gpio_node, 0);
421 if (gpio_irq != NO_IRQ) {
422 if (request_irq(gpio_irq, gpio1_interrupt, IRQF_TIMER,
423 "GPIO1 ADB", (void *)0))
424 printk(KERN_ERR "pmu: can't get irq %d"
425 " (GPIO1)\n", gpio_irq);
427 gpio_irq_enabled = 1;
431 /* Enable interrupts */
432 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
434 pmu_fully_inited = 1;
436 /* Make sure PMU settle down before continuing. This is _very_ important
437 * since the IDE probe may shut interrupts down for quite a bit of time. If
438 * a PMU communication is pending while this happens, the PMU may timeout
439 * Not that on Core99 machines, the PMU keeps sending us environement
440 * messages, we should find a way to either fix IDE or make it call
441 * pmu_suspend() before masking interrupts. This can also happens while
442 * scolling with some fbdevs.
446 } while (pmu_state != idle);
451 arch_initcall(via_pmu_start);
454 * This has to be done after pci_init, which is a subsys_initcall.
456 static int __init via_pmu_dev_init(void)
461 #ifdef CONFIG_PMAC_BACKLIGHT
462 /* Initialize backlight */
463 pmu_backlight_init();
467 if (of_machine_is_compatible("AAPL,3400/2400") ||
468 of_machine_is_compatible("AAPL,3500")) {
469 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
470 NULL, PMAC_MB_INFO_MODEL, 0);
471 pmu_battery_count = 1;
472 if (mb == PMAC_TYPE_COMET)
473 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
475 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
476 } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
477 of_machine_is_compatible("PowerBook1,1")) {
478 pmu_battery_count = 2;
479 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
480 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
482 struct device_node* prim =
483 of_find_node_by_name(NULL, "power-mgt");
484 const u32 *prim_info = NULL;
486 prim_info = of_get_property(prim, "prim-info", NULL);
488 /* Other stuffs here yet unknown */
489 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
490 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
491 if (pmu_battery_count > 1)
492 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
496 #endif /* CONFIG_PPC32 */
498 /* Create /proc/pmu */
499 proc_pmu_root = proc_mkdir("pmu", NULL);
503 for (i=0; i<pmu_battery_count; i++) {
505 sprintf(title, "battery_%ld", i);
506 proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
507 &pmu_battery_proc_fops, (void *)i);
510 proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
511 proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
512 &pmu_irqstats_proc_fops);
513 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
514 &pmu_options_proc_fops);
519 device_initcall(via_pmu_dev_init);
525 struct adb_request req;
527 out_8(&via[B], via[B] | TREQ); /* negate TREQ */
528 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */
530 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
532 while (!req.complete) {
534 printk(KERN_ERR "init_pmu: no response from PMU\n");
541 /* ack all pending interrupts */
543 interrupt_data[0][0] = 1;
544 while (interrupt_data[0][0] || pmu_state != idle) {
546 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
549 if (pmu_state == idle)
551 via_pmu_interrupt(0, NULL);
555 /* Tell PMU we are ready. */
556 if (pmu_kind == PMU_KEYLARGO_BASED) {
557 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
558 while (!req.complete)
562 /* Read PMU version */
563 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
564 pmu_wait_complete(&req);
565 if (req.reply_len > 0)
566 pmu_version = req.reply[0];
568 /* Read server mode setting */
569 if (pmu_kind == PMU_KEYLARGO_BASED) {
570 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
571 PMU_PWR_GET_POWERUP_EVENTS);
572 pmu_wait_complete(&req);
573 if (req.reply_len == 2) {
574 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
575 option_server_mode = 1;
576 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
577 option_server_mode ? "enabled" : "disabled");
589 static void pmu_set_server_mode(int server_mode)
591 struct adb_request req;
593 if (pmu_kind != PMU_KEYLARGO_BASED)
596 option_server_mode = server_mode;
597 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
598 pmu_wait_complete(&req);
599 if (req.reply_len < 2)
602 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
603 PMU_PWR_SET_POWERUP_EVENTS,
604 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
606 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
607 PMU_PWR_CLR_POWERUP_EVENTS,
608 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
609 pmu_wait_complete(&req);
612 /* This new version of the code for 2400/3400/3500 powerbooks
613 * is inspired from the implementation in gkrellm-pmu
616 done_battery_state_ohare(struct adb_request* req)
620 * 0x01 : AC indicator
622 * 0x04 : battery exist
625 * 0x20 : full charged
626 * 0x40 : pcharge reset
627 * 0x80 : battery exist
629 * [1][2] : battery voltage
630 * [3] : CPU temperature
631 * [4] : battery temperature
636 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
637 long pcharge, charge, vb, vmax, lmax;
638 long vmax_charging, vmax_charged;
639 long amperage, voltage, time, max;
640 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
641 NULL, PMAC_MB_INFO_MODEL, 0);
643 if (req->reply[0] & 0x01)
644 pmu_power_flags |= PMU_PWR_AC_PRESENT;
646 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
648 if (mb == PMAC_TYPE_COMET) {
659 /* If battery installed */
660 if (req->reply[0] & 0x04) {
661 bat_flags |= PMU_BATT_PRESENT;
662 if (req->reply[0] & 0x02)
663 bat_flags |= PMU_BATT_CHARGING;
664 vb = (req->reply[1] << 8) | req->reply[2];
665 voltage = (vb * 265 + 72665) / 10;
666 amperage = req->reply[5];
667 if ((req->reply[0] & 0x01) == 0) {
669 vb += ((amperage - 200) * 15)/100;
670 } else if (req->reply[0] & 0x02) {
671 vb = (vb * 97) / 100;
672 vmax = vmax_charging;
674 charge = (100 * vb) / vmax;
675 if (req->reply[0] & 0x40) {
676 pcharge = (req->reply[6] << 8) + req->reply[7];
680 pcharge = 100 - pcharge / lmax;
681 if (pcharge < charge)
685 time = (charge * 16440) / amperage;
689 amperage = -amperage;
691 charge = max = amperage = voltage = time = 0;
693 pmu_batteries[pmu_cur_battery].flags = bat_flags;
694 pmu_batteries[pmu_cur_battery].charge = charge;
695 pmu_batteries[pmu_cur_battery].max_charge = max;
696 pmu_batteries[pmu_cur_battery].amperage = amperage;
697 pmu_batteries[pmu_cur_battery].voltage = voltage;
698 pmu_batteries[pmu_cur_battery].time_remaining = time;
700 clear_bit(0, &async_req_locks);
704 done_battery_state_smart(struct adb_request* req)
707 * [0] : format of this structure (known: 3,4,5)
720 * [4][5] : max charge
725 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
727 unsigned int capa, max, voltage;
729 if (req->reply[1] & 0x01)
730 pmu_power_flags |= PMU_PWR_AC_PRESENT;
732 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
735 capa = max = amperage = voltage = 0;
737 if (req->reply[1] & 0x04) {
738 bat_flags |= PMU_BATT_PRESENT;
739 switch(req->reply[0]) {
741 case 4: capa = req->reply[2];
743 amperage = *((signed char *)&req->reply[4]);
744 voltage = req->reply[5];
746 case 5: capa = (req->reply[2] << 8) | req->reply[3];
747 max = (req->reply[4] << 8) | req->reply[5];
748 amperage = *((signed short *)&req->reply[6]);
749 voltage = (req->reply[8] << 8) | req->reply[9];
752 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
753 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
758 if ((req->reply[1] & 0x01) && (amperage > 0))
759 bat_flags |= PMU_BATT_CHARGING;
761 pmu_batteries[pmu_cur_battery].flags = bat_flags;
762 pmu_batteries[pmu_cur_battery].charge = capa;
763 pmu_batteries[pmu_cur_battery].max_charge = max;
764 pmu_batteries[pmu_cur_battery].amperage = amperage;
765 pmu_batteries[pmu_cur_battery].voltage = voltage;
767 if ((req->reply[1] & 0x01) && (amperage > 0))
768 pmu_batteries[pmu_cur_battery].time_remaining
769 = ((max-capa) * 3600) / amperage;
771 pmu_batteries[pmu_cur_battery].time_remaining
772 = (capa * 3600) / (-amperage);
774 pmu_batteries[pmu_cur_battery].time_remaining = 0;
776 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
778 clear_bit(0, &async_req_locks);
782 query_battery_state(void)
784 if (test_and_set_bit(0, &async_req_locks))
786 if (pmu_kind == PMU_OHARE_BASED)
787 pmu_request(&batt_req, done_battery_state_ohare,
788 1, PMU_BATTERY_STATE);
790 pmu_request(&batt_req, done_battery_state_smart,
791 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
794 static int pmu_info_proc_show(struct seq_file *m, void *v)
796 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
797 seq_printf(m, "PMU firmware version : %02x\n", pmu_version);
798 seq_printf(m, "AC Power : %d\n",
799 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
800 seq_printf(m, "Battery count : %d\n", pmu_battery_count);
805 static int pmu_info_proc_open(struct inode *inode, struct file *file)
807 return single_open(file, pmu_info_proc_show, NULL);
810 static const struct file_operations pmu_info_proc_fops = {
811 .owner = THIS_MODULE,
812 .open = pmu_info_proc_open,
815 .release = single_release,
818 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
821 static const char *irq_names[] = {
822 "Total CB1 triggered events",
823 "Total GPIO1 triggered events",
824 "PC-Card eject button",
825 "Sound/Brightness button",
827 "Battery state change",
828 "Environment interrupt",
830 "Ghost interrupt (zero len)",
831 "Empty interrupt (empty mask)",
835 for (i=0; i<11; i++) {
836 seq_printf(m, " %2u: %10u (%s)\n",
837 i, pmu_irq_stats[i], irq_names[i]);
842 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
844 return single_open(file, pmu_irqstats_proc_show, NULL);
847 static const struct file_operations pmu_irqstats_proc_fops = {
848 .owner = THIS_MODULE,
849 .open = pmu_irqstats_proc_open,
852 .release = single_release,
855 static int pmu_battery_proc_show(struct seq_file *m, void *v)
857 long batnum = (long)m->private;
860 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags);
861 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge);
862 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
863 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage);
864 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage);
865 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining);
869 static int pmu_battery_proc_open(struct inode *inode, struct file *file)
871 return single_open(file, pmu_battery_proc_show, PDE(inode)->data);
874 static const struct file_operations pmu_battery_proc_fops = {
875 .owner = THIS_MODULE,
876 .open = pmu_battery_proc_open,
879 .release = single_release,
882 static int pmu_options_proc_show(struct seq_file *m, void *v)
884 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
885 if (pmu_kind == PMU_KEYLARGO_BASED &&
886 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
887 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
889 if (pmu_kind == PMU_KEYLARGO_BASED)
890 seq_printf(m, "server_mode=%d\n", option_server_mode);
895 static int pmu_options_proc_open(struct inode *inode, struct file *file)
897 return single_open(file, pmu_options_proc_show, NULL);
900 static ssize_t pmu_options_proc_write(struct file *file,
901 const char __user *buffer, size_t count, loff_t *pos)
905 size_t fcount = count;
911 if (copy_from_user(tmp, buffer, count))
919 while(*val && (*val != '=')) {
929 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
930 if (pmu_kind == PMU_KEYLARGO_BASED &&
931 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
932 if (!strcmp(label, "lid_wakeup"))
933 option_lid_wakeup = ((*val) == '1');
935 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
937 new_value = ((*val) == '1');
938 if (new_value != option_server_mode)
939 pmu_set_server_mode(new_value);
944 static const struct file_operations pmu_options_proc_fops = {
945 .owner = THIS_MODULE,
946 .open = pmu_options_proc_open,
949 .release = single_release,
950 .write = pmu_options_proc_write,
954 /* Send an ADB command */
955 static int pmu_send_request(struct adb_request *req, int sync)
959 if ((vias == NULL) || (!pmu_fully_inited)) {
966 switch (req->data[0]) {
968 for (i = 0; i < req->nbytes - 1; ++i)
969 req->data[i] = req->data[i+1];
971 if (pmu_data_len[req->data[0]][1] != 0) {
972 req->reply[0] = ADB_RET_OK;
976 ret = pmu_queue_request(req);
979 switch (req->data[1]) {
981 if (req->nbytes != 2)
983 req->data[0] = PMU_READ_RTC;
986 req->reply[0] = CUDA_PACKET;
988 req->reply[2] = CUDA_GET_TIME;
989 ret = pmu_queue_request(req);
992 if (req->nbytes != 6)
994 req->data[0] = PMU_SET_RTC;
996 for (i = 1; i <= 4; ++i)
997 req->data[i] = req->data[i+1];
999 req->reply[0] = CUDA_PACKET;
1001 req->reply[2] = CUDA_SET_TIME;
1002 ret = pmu_queue_request(req);
1009 for (i = req->nbytes - 1; i > 1; --i)
1010 req->data[i+2] = req->data[i];
1011 req->data[3] = req->nbytes - 2;
1012 req->data[2] = pmu_adb_flags;
1013 /*req->data[1] = req->data[1];*/
1014 req->data[0] = PMU_ADB_CMD;
1016 req->reply_expected = 1;
1018 ret = pmu_queue_request(req);
1027 while (!req->complete)
1033 /* Enable/disable autopolling */
1034 static int __pmu_adb_autopoll(int devs)
1036 struct adb_request req;
1039 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1040 adb_dev_map >> 8, adb_dev_map);
1043 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1046 while (!req.complete)
1051 static int pmu_adb_autopoll(int devs)
1053 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1057 return __pmu_adb_autopoll(devs);
1060 /* Reset the ADB bus */
1061 static int pmu_adb_reset_bus(void)
1063 struct adb_request req;
1064 int save_autopoll = adb_dev_map;
1066 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1069 /* anyone got a better idea?? */
1070 __pmu_adb_autopoll(0);
1074 req.data[0] = PMU_ADB_CMD;
1075 req.data[1] = ADB_BUSRESET;
1080 req.reply_expected = 1;
1081 if (pmu_queue_request(&req) != 0) {
1082 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1085 pmu_wait_complete(&req);
1087 if (save_autopoll != 0)
1088 __pmu_adb_autopoll(save_autopoll);
1092 #endif /* CONFIG_ADB */
1094 /* Construct and send a pmu request */
1096 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1105 if (nbytes < 0 || nbytes > 32) {
1106 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1110 req->nbytes = nbytes;
1112 va_start(list, nbytes);
1113 for (i = 0; i < nbytes; ++i)
1114 req->data[i] = va_arg(list, int);
1117 req->reply_expected = 0;
1118 return pmu_queue_request(req);
1122 pmu_queue_request(struct adb_request *req)
1124 unsigned long flags;
1131 if (req->nbytes <= 0) {
1135 nsend = pmu_data_len[req->data[0]][0];
1136 if (nsend >= 0 && req->nbytes != nsend + 1) {
1145 spin_lock_irqsave(&pmu_lock, flags);
1146 if (current_req != 0) {
1147 last_req->next = req;
1152 if (pmu_state == idle)
1155 spin_unlock_irqrestore(&pmu_lock, flags);
1163 /* Sightly increased the delay, I had one occurrence of the message
1167 while ((in_8(&via[B]) & TACK) == 0) {
1168 if (--timeout < 0) {
1169 printk(KERN_ERR "PMU not responding (!ack)\n");
1176 /* New PMU seems to be very sensitive to those timings, so we make sure
1177 * PCI is flushed immediately */
1181 volatile unsigned char __iomem *v = via;
1183 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1185 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
1192 volatile unsigned char __iomem *v = via;
1194 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1195 in_8(&v[SR]); /* resets SR */
1196 out_8(&v[B], in_8(&v[B]) & ~TREQ);
1201 pmu_done(struct adb_request *req)
1203 void (*done)(struct adb_request *) = req->done;
1206 /* Here, we assume that if the request has a done member, the
1207 * struct request will survive to setting req->complete to 1
1216 struct adb_request *req;
1218 /* assert pmu_state == idle */
1219 /* get the packet to send */
1221 if (req == 0 || pmu_state != idle
1222 || (/*req->reply_expected && */req_awaiting_reply))
1225 pmu_state = sending;
1227 data_len = pmu_data_len[req->data[0]][0];
1229 /* Sounds safer to make sure ACK is high before writing. This helped
1230 * kill a problem with ADB and some iBooks
1233 /* set the shift register to shift out and send a byte */
1234 send_byte(req->data[0]);
1244 via_pmu_interrupt(0, NULL);
1254 /* Kicks ADB read when PMU is suspended */
1255 adb_int_pending = 1;
1257 via_pmu_interrupt(0, NULL);
1258 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1259 || req_awaiting_reply));
1263 pmu_wait_complete(struct adb_request *req)
1267 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1268 via_pmu_interrupt(0, NULL);
1271 /* This function loops until the PMU is idle and prevents it from
1272 * anwsering to ADB interrupts. pmu_request can still be called.
1273 * This is done to avoid spurrious shutdowns when we know we'll have
1274 * interrupts switched off for a long time
1279 unsigned long flags;
1284 spin_lock_irqsave(&pmu_lock, flags);
1286 if (pmu_suspended > 1) {
1287 spin_unlock_irqrestore(&pmu_lock, flags);
1292 spin_unlock_irqrestore(&pmu_lock, flags);
1293 if (req_awaiting_reply)
1294 adb_int_pending = 1;
1295 via_pmu_interrupt(0, NULL);
1296 spin_lock_irqsave(&pmu_lock, flags);
1297 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1299 disable_irq_nosync(gpio_irq);
1300 out_8(&via[IER], CB1_INT | IER_CLR);
1301 spin_unlock_irqrestore(&pmu_lock, flags);
1310 unsigned long flags;
1312 if (!via || (pmu_suspended < 1))
1315 spin_lock_irqsave(&pmu_lock, flags);
1317 if (pmu_suspended > 0) {
1318 spin_unlock_irqrestore(&pmu_lock, flags);
1321 adb_int_pending = 1;
1323 enable_irq(gpio_irq);
1324 out_8(&via[IER], CB1_INT | IER_SET);
1325 spin_unlock_irqrestore(&pmu_lock, flags);
1329 /* Interrupt data could be the result data from an ADB cmd */
1331 pmu_handle_data(unsigned char *data, int len)
1333 unsigned char ints, pirq;
1337 if (drop_interrupts || len < 1) {
1338 adb_int_pending = 0;
1343 /* Get PMU interrupt mask */
1346 /* Record zero interrupts for stats */
1350 /* Hack to deal with ADB autopoll flag */
1351 if (ints & PMU_INT_ADB)
1352 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1357 if (i > pmu_irq_stats[10])
1358 pmu_irq_stats[10] = i;
1362 for (pirq = 0; pirq < 8; pirq++)
1363 if (ints & (1 << pirq))
1365 pmu_irq_stats[pirq]++;
1367 ints &= ~(1 << pirq);
1369 /* Note: for some reason, we get an interrupt with len=1,
1370 * data[0]==0 after each normal ADB interrupt, at least
1371 * on the Pismo. Still investigating... --BenH
1373 if ((1 << pirq) & PMU_INT_ADB) {
1374 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1375 struct adb_request *req = req_awaiting_reply;
1377 printk(KERN_ERR "PMU: extra ADB reply\n");
1380 req_awaiting_reply = NULL;
1384 memcpy(req->reply, data + 1, len - 1);
1385 req->reply_len = len - 1;
1389 if (len == 4 && data[1] == 0x2c) {
1390 extern int xmon_wants_key, xmon_adb_keycode;
1391 if (xmon_wants_key) {
1392 xmon_adb_keycode = data[2];
1398 * XXX On the [23]400 the PMU gives us an up
1399 * event for keycodes 0x74 or 0x75 when the PC
1400 * card eject buttons are released, so we
1401 * ignore those events.
1403 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1404 && data[1] == 0x2c && data[3] == 0xff
1405 && (data[2] & ~1) == 0xf4))
1406 adb_input(data+1, len-1, 1);
1407 #endif /* CONFIG_ADB */
1410 /* Sound/brightness button pressed */
1411 else if ((1 << pirq) & PMU_INT_SNDBRT) {
1412 #ifdef CONFIG_PMAC_BACKLIGHT
1414 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1417 /* Tick interrupt */
1418 else if ((1 << pirq) & PMU_INT_TICK) {
1419 /* Environement or tick interrupt, query batteries */
1420 if (pmu_battery_count) {
1421 if ((--query_batt_timer) == 0) {
1422 query_battery_state();
1423 query_batt_timer = BATTERY_POLLING_COUNT;
1427 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1428 if (pmu_battery_count)
1429 query_battery_state();
1430 pmu_pass_intr(data, len);
1431 /* len == 6 is probably a bad check. But how do I
1432 * know what PMU versions send what events here? */
1434 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1435 via_pmu_event(PMU_EVT_LID, data[1]&1);
1438 pmu_pass_intr(data, len);
1443 static struct adb_request*
1446 struct adb_request *req;
1449 if (via[B] & TREQ) {
1450 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1451 out_8(&via[IFR], SR_INT);
1454 /* The ack may not yet be low when we get the interrupt */
1455 while ((in_8(&via[B]) & TACK) != 0)
1458 /* if reading grab the byte, and reset the interrupt */
1459 if (pmu_state == reading || pmu_state == reading_intr)
1460 bite = in_8(&via[SR]);
1462 /* reset TREQ and wait for TACK to go high */
1463 out_8(&via[B], in_8(&via[B]) | TREQ);
1466 switch (pmu_state) {
1470 data_len = req->nbytes - 1;
1471 send_byte(data_len);
1474 if (data_index <= data_len) {
1475 send_byte(req->data[data_index++]);
1479 data_len = pmu_data_len[req->data[0]][1];
1480 if (data_len == 0) {
1482 current_req = req->next;
1483 if (req->reply_expected)
1484 req_awaiting_reply = req;
1488 pmu_state = reading;
1490 reply_ptr = req->reply + req->reply_len;
1498 pmu_state = reading_intr;
1499 reply_ptr = interrupt_data[int_data_last];
1501 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1502 enable_irq(gpio_irq);
1503 gpio_irq_enabled = 1;
1509 if (data_len == -1) {
1512 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1513 } else if (data_index < 32) {
1514 reply_ptr[data_index++] = bite;
1516 if (data_index < data_len) {
1521 if (pmu_state == reading_intr) {
1523 int_data_state[int_data_last] = int_data_ready;
1524 interrupt_data_len[int_data_last] = data_len;
1528 * For PMU sleep and freq change requests, we lock the
1529 * PMU until it's explicitly unlocked. This avoids any
1530 * spurrious event polling getting in
1532 current_req = req->next;
1533 req->reply_len += data_index;
1534 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1543 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1550 via_pmu_interrupt(int irq, void *arg)
1552 unsigned long flags;
1556 struct adb_request *req = NULL;
1559 /* This is a bit brutal, we can probably do better */
1560 spin_lock_irqsave(&pmu_lock, flags);
1564 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1568 if (++nloop > 1000) {
1569 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1570 "intr=%x, ier=%x pmu_state=%d\n",
1571 intr, in_8(&via[IER]), pmu_state);
1574 out_8(&via[IFR], intr);
1575 if (intr & CB1_INT) {
1576 adb_int_pending = 1;
1579 if (intr & SR_INT) {
1580 req = pmu_sr_intr();
1587 if (pmu_state == idle) {
1588 if (adb_int_pending) {
1589 if (int_data_state[0] == int_data_empty)
1591 else if (int_data_state[1] == int_data_empty)
1596 int_data_state[int_data_last] = int_data_fill;
1597 /* Sounds safer to make sure ACK is high before writing.
1598 * This helped kill a problem with ADB and some iBooks
1601 send_byte(PMU_INT_ACK);
1602 adb_int_pending = 0;
1603 } else if (current_req)
1607 /* Mark the oldest buffer for flushing */
1608 if (int_data_state[!int_data_last] == int_data_ready) {
1609 int_data_state[!int_data_last] = int_data_flush;
1610 int_data = !int_data_last;
1611 } else if (int_data_state[int_data_last] == int_data_ready) {
1612 int_data_state[int_data_last] = int_data_flush;
1613 int_data = int_data_last;
1616 spin_unlock_irqrestore(&pmu_lock, flags);
1618 /* Deal with completed PMU requests outside of the lock */
1624 /* Deal with interrupt datas outside of the lock */
1625 if (int_data >= 0) {
1626 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1627 spin_lock_irqsave(&pmu_lock, flags);
1629 int_data_state[int_data] = int_data_empty;
1634 return IRQ_RETVAL(handled);
1640 unsigned long flags;
1642 spin_lock_irqsave(&pmu_lock, flags);
1643 if (pmu_state == locked)
1645 adb_int_pending = 1;
1646 spin_unlock_irqrestore(&pmu_lock, flags);
1651 gpio1_interrupt(int irq, void *arg)
1653 unsigned long flags;
1655 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1656 spin_lock_irqsave(&pmu_lock, flags);
1657 if (gpio_irq_enabled > 0) {
1658 disable_irq_nosync(gpio_irq);
1659 gpio_irq_enabled = 0;
1662 adb_int_pending = 1;
1663 spin_unlock_irqrestore(&pmu_lock, flags);
1664 via_pmu_interrupt(0, NULL);
1671 pmu_enable_irled(int on)
1673 struct adb_request req;
1677 if (pmu_kind == PMU_KEYLARGO_BASED)
1680 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1681 (on ? PMU_POW_ON : PMU_POW_OFF));
1682 pmu_wait_complete(&req);
1688 struct adb_request req;
1693 local_irq_disable();
1695 drop_interrupts = 1;
1697 if (pmu_kind != PMU_KEYLARGO_BASED) {
1698 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1700 while(!req.complete)
1704 pmu_request(&req, NULL, 1, PMU_RESET);
1705 pmu_wait_complete(&req);
1713 struct adb_request req;
1718 local_irq_disable();
1720 drop_interrupts = 1;
1722 if (pmu_kind != PMU_KEYLARGO_BASED) {
1723 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1725 pmu_wait_complete(&req);
1727 /* Disable server mode on shutdown or we'll just
1730 pmu_set_server_mode(0);
1733 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1734 'M', 'A', 'T', 'T');
1735 pmu_wait_complete(&req);
1746 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1748 * Put the powerbook to sleep.
1751 static u32 save_via[8];
1754 save_via_state(void)
1756 save_via[0] = in_8(&via[ANH]);
1757 save_via[1] = in_8(&via[DIRA]);
1758 save_via[2] = in_8(&via[B]);
1759 save_via[3] = in_8(&via[DIRB]);
1760 save_via[4] = in_8(&via[PCR]);
1761 save_via[5] = in_8(&via[ACR]);
1762 save_via[6] = in_8(&via[T1CL]);
1763 save_via[7] = in_8(&via[T1CH]);
1766 restore_via_state(void)
1768 out_8(&via[ANH], save_via[0]);
1769 out_8(&via[DIRA], save_via[1]);
1770 out_8(&via[B], save_via[2]);
1771 out_8(&via[DIRB], save_via[3]);
1772 out_8(&via[PCR], save_via[4]);
1773 out_8(&via[ACR], save_via[5]);
1774 out_8(&via[T1CL], save_via[6]);
1775 out_8(&via[T1CH], save_via[7]);
1776 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
1777 out_8(&via[IFR], 0x7f); /* clear IFR */
1778 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1781 #define GRACKLE_PM (1<<7)
1782 #define GRACKLE_DOZE (1<<5)
1783 #define GRACKLE_NAP (1<<4)
1784 #define GRACKLE_SLEEP (1<<3)
1786 static int powerbook_sleep_grackle(void)
1788 unsigned long save_l2cr;
1789 unsigned short pmcr1;
1790 struct adb_request req;
1791 struct pci_dev *grackle;
1793 grackle = pci_get_bus_and_slot(0, 0);
1797 /* Turn off various things. Darwin does some retry tests here... */
1798 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1799 pmu_wait_complete(&req);
1800 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1801 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1802 pmu_wait_complete(&req);
1804 /* For 750, save backside cache setting and disable it */
1805 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1807 if (!__fake_sleep) {
1808 /* Ask the PMU to put us to sleep */
1809 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1810 pmu_wait_complete(&req);
1813 /* The VIA is supposed not to be restored correctly*/
1815 /* We shut down some HW */
1816 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1818 pci_read_config_word(grackle, 0x70, &pmcr1);
1819 /* Apparently, MacOS uses NAP mode for Grackle ??? */
1820 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1821 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1822 pci_write_config_word(grackle, 0x70, pmcr1);
1824 /* Call low-level ASM sleep handler */
1828 low_sleep_handler();
1830 /* We're awake again, stop grackle PM */
1831 pci_read_config_word(grackle, 0x70, &pmcr1);
1832 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1833 pci_write_config_word(grackle, 0x70, pmcr1);
1835 pci_dev_put(grackle);
1837 /* Make sure the PMU is idle */
1838 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1839 restore_via_state();
1841 /* Restore L2 cache */
1842 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1843 _set_L2CR(save_l2cr);
1845 /* Restore userland MMU context */
1846 switch_mmu_context(NULL, current->active_mm);
1848 /* Power things up */
1850 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1851 pmu_wait_complete(&req);
1852 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1853 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1854 pmu_wait_complete(&req);
1855 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1856 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1857 pmu_wait_complete(&req);
1863 powerbook_sleep_Core99(void)
1865 unsigned long save_l2cr;
1866 unsigned long save_l3cr;
1867 struct adb_request req;
1869 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1870 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1874 if (num_online_cpus() > 1 || cpu_is_offline(0))
1877 /* Stop environment and ADB interrupts */
1878 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1879 pmu_wait_complete(&req);
1881 /* Tell PMU what events will wake us up */
1882 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1884 pmu_wait_complete(&req);
1885 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1886 0, PMU_PWR_WAKEUP_KEY |
1887 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1888 pmu_wait_complete(&req);
1890 /* Save the state of the L2 and L3 caches */
1891 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
1892 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1894 if (!__fake_sleep) {
1895 /* Ask the PMU to put us to sleep */
1896 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1897 pmu_wait_complete(&req);
1900 /* The VIA is supposed not to be restored correctly*/
1903 /* Shut down various ASICs. There's a chance that we can no longer
1904 * talk to the PMU after this, so I moved it to _after_ sending the
1905 * sleep command to it. Still need to be checked.
1907 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1909 /* Call low-level ASM sleep handler */
1913 low_sleep_handler();
1915 /* Restore Apple core ASICs state */
1916 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1919 restore_via_state();
1921 /* tweak LPJ before cpufreq is there */
1922 loops_per_jiffy *= 2;
1925 pmac_call_early_video_resume();
1927 /* Restore L2 cache */
1928 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1929 _set_L2CR(save_l2cr);
1930 /* Restore L3 cache */
1931 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1932 _set_L3CR(save_l3cr);
1934 /* Restore userland MMU context */
1935 switch_mmu_context(NULL, current->active_mm);
1937 /* Tell PMU we are ready */
1939 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1940 pmu_wait_complete(&req);
1941 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1942 pmu_wait_complete(&req);
1944 /* Restore LPJ, cpufreq will adjust the cpu frequency */
1945 loops_per_jiffy /= 2;
1950 #define PB3400_MEM_CTRL 0xf8000000
1951 #define PB3400_MEM_CTRL_SLEEP 0x70
1953 static void __iomem *pb3400_mem_ctrl;
1955 static void powerbook_sleep_init_3400(void)
1957 /* map in the memory controller registers */
1958 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1959 if (pb3400_mem_ctrl == NULL)
1960 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1963 static int powerbook_sleep_3400(void)
1968 struct adb_request sleep_req;
1969 unsigned int __iomem *mem_ctrl_sleep;
1971 if (pb3400_mem_ctrl == NULL)
1973 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1975 /* Set the memory controller to keep the memory refreshed
1976 while we're asleep */
1977 for (i = 0x403f; i >= 0x4000; --i) {
1978 out_be32(mem_ctrl_sleep, i);
1980 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1986 /* Ask the PMU to put us to sleep */
1987 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1988 pmu_wait_complete(&sleep_req);
1991 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1995 /* Put the CPU into sleep mode */
1996 hid0 = mfspr(SPRN_HID0);
1997 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
1998 mtspr(SPRN_HID0, hid0);
2000 msr = mfmsr() | MSR_POW;
2006 local_irq_disable();
2008 /* OK, we're awake again, start restoring things */
2009 out_be32(mem_ctrl_sleep, 0x3f);
2010 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2015 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2018 * Support for /dev/pmu device
2020 #define RB_SIZE 0x10
2021 struct pmu_private {
2022 struct list_head list;
2027 unsigned char data[16];
2029 wait_queue_head_t wait;
2031 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2032 int backlight_locker;
2036 static LIST_HEAD(all_pmu_pvt);
2037 static DEFINE_SPINLOCK(all_pvt_lock);
2040 pmu_pass_intr(unsigned char *data, int len)
2042 struct pmu_private *pp;
2043 struct list_head *list;
2045 unsigned long flags;
2047 if (len > sizeof(pp->rb_buf[0].data))
2048 len = sizeof(pp->rb_buf[0].data);
2049 spin_lock_irqsave(&all_pvt_lock, flags);
2050 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2051 pp = list_entry(list, struct pmu_private, list);
2052 spin_lock(&pp->lock);
2056 if (i != pp->rb_get) {
2057 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2059 memcpy(rp->data, data, len);
2061 wake_up_interruptible(&pp->wait);
2063 spin_unlock(&pp->lock);
2065 spin_unlock_irqrestore(&all_pvt_lock, flags);
2069 pmu_open(struct inode *inode, struct file *file)
2071 struct pmu_private *pp;
2072 unsigned long flags;
2074 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2077 pp->rb_get = pp->rb_put = 0;
2078 spin_lock_init(&pp->lock);
2079 init_waitqueue_head(&pp->wait);
2081 spin_lock_irqsave(&all_pvt_lock, flags);
2082 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2083 pp->backlight_locker = 0;
2085 list_add(&pp->list, &all_pmu_pvt);
2086 spin_unlock_irqrestore(&all_pvt_lock, flags);
2087 file->private_data = pp;
2093 pmu_read(struct file *file, char __user *buf,
2094 size_t count, loff_t *ppos)
2096 struct pmu_private *pp = file->private_data;
2097 DECLARE_WAITQUEUE(wait, current);
2098 unsigned long flags;
2101 if (count < 1 || pp == 0)
2103 if (!access_ok(VERIFY_WRITE, buf, count))
2106 spin_lock_irqsave(&pp->lock, flags);
2107 add_wait_queue(&pp->wait, &wait);
2108 current->state = TASK_INTERRUPTIBLE;
2112 if (pp->rb_get != pp->rb_put) {
2114 struct rb_entry *rp = &pp->rb_buf[i];
2116 spin_unlock_irqrestore(&pp->lock, flags);
2119 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2123 spin_lock_irqsave(&pp->lock, flags);
2128 if (file->f_flags & O_NONBLOCK)
2131 if (signal_pending(current))
2133 spin_unlock_irqrestore(&pp->lock, flags);
2135 spin_lock_irqsave(&pp->lock, flags);
2137 current->state = TASK_RUNNING;
2138 remove_wait_queue(&pp->wait, &wait);
2139 spin_unlock_irqrestore(&pp->lock, flags);
2145 pmu_write(struct file *file, const char __user *buf,
2146 size_t count, loff_t *ppos)
2152 pmu_fpoll(struct file *filp, poll_table *wait)
2154 struct pmu_private *pp = filp->private_data;
2155 unsigned int mask = 0;
2156 unsigned long flags;
2160 poll_wait(filp, &pp->wait, wait);
2161 spin_lock_irqsave(&pp->lock, flags);
2162 if (pp->rb_get != pp->rb_put)
2164 spin_unlock_irqrestore(&pp->lock, flags);
2169 pmu_release(struct inode *inode, struct file *file)
2171 struct pmu_private *pp = file->private_data;
2172 unsigned long flags;
2175 file->private_data = NULL;
2176 spin_lock_irqsave(&all_pvt_lock, flags);
2177 list_del(&pp->list);
2178 spin_unlock_irqrestore(&all_pvt_lock, flags);
2180 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2181 if (pp->backlight_locker)
2182 pmac_backlight_enable();
2190 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2191 static void pmac_suspend_disable_irqs(void)
2193 /* Call platform functions marked "on sleep" */
2194 pmac_pfunc_i2c_suspend();
2195 pmac_pfunc_base_suspend();
2198 static int powerbook_sleep(suspend_state_t state)
2202 /* Wait for completion of async requests */
2203 while (!batt_req.complete)
2206 /* Giveup the lazy FPU & vec so we don't have to back them
2207 * up from the low level code
2211 #ifdef CONFIG_ALTIVEC
2212 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2213 enable_kernel_altivec();
2214 #endif /* CONFIG_ALTIVEC */
2217 case PMU_OHARE_BASED:
2218 error = powerbook_sleep_3400();
2220 case PMU_HEATHROW_BASED:
2221 case PMU_PADDINGTON_BASED:
2222 error = powerbook_sleep_grackle();
2224 case PMU_KEYLARGO_BASED:
2225 error = powerbook_sleep_Core99();
2239 static void pmac_suspend_enable_irqs(void)
2241 /* Force a poll of ADB interrupts */
2242 adb_int_pending = 1;
2243 via_pmu_interrupt(0, NULL);
2247 /* Call platform functions marked "on wake" */
2248 pmac_pfunc_base_resume();
2249 pmac_pfunc_i2c_resume();
2252 static int pmu_sleep_valid(suspend_state_t state)
2254 return state == PM_SUSPEND_MEM
2255 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2258 static struct platform_suspend_ops pmu_pm_ops = {
2259 .enter = powerbook_sleep,
2260 .valid = pmu_sleep_valid,
2263 static int register_pmu_pm_ops(void)
2265 if (pmu_kind == PMU_OHARE_BASED)
2266 powerbook_sleep_init_3400();
2267 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2268 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2269 suspend_set_ops(&pmu_pm_ops);
2274 device_initcall(register_pmu_pm_ops);
2277 static int pmu_ioctl(struct file *filp,
2278 u_int cmd, u_long arg)
2280 __u32 __user *argp = (__u32 __user *)arg;
2281 int error = -EINVAL;
2285 if (!capable(CAP_SYS_ADMIN))
2287 return pm_suspend(PM_SUSPEND_MEM);
2288 case PMU_IOC_CAN_SLEEP:
2289 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2290 return put_user(0, argp);
2292 return put_user(1, argp);
2294 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2295 /* Compatibility ioctl's for backlight */
2296 case PMU_IOC_GET_BACKLIGHT:
2300 brightness = pmac_backlight_get_legacy_brightness();
2304 return put_user(brightness, argp);
2307 case PMU_IOC_SET_BACKLIGHT:
2311 error = get_user(brightness, argp);
2315 return pmac_backlight_set_legacy_brightness(brightness);
2317 #ifdef CONFIG_INPUT_ADBHID
2318 case PMU_IOC_GRAB_BACKLIGHT: {
2319 struct pmu_private *pp = filp->private_data;
2321 if (pp->backlight_locker)
2324 pp->backlight_locker = 1;
2325 pmac_backlight_disable();
2329 #endif /* CONFIG_INPUT_ADBHID */
2330 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2332 case PMU_IOC_GET_MODEL:
2333 return put_user(pmu_kind, argp);
2334 case PMU_IOC_HAS_ADB:
2335 return put_user(pmu_has_adb, argp);
2340 static long pmu_unlocked_ioctl(struct file *filp,
2341 u_int cmd, u_long arg)
2346 ret = pmu_ioctl(filp, cmd, arg);
2352 static const struct file_operations pmu_device_fops = {
2356 .unlocked_ioctl = pmu_unlocked_ioctl,
2358 .release = pmu_release,
2361 static struct miscdevice pmu_device = {
2362 PMU_MINOR, "pmu", &pmu_device_fops
2365 static int pmu_device_init(void)
2369 if (misc_register(&pmu_device) < 0)
2370 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2373 device_initcall(pmu_device_init);
2378 polled_handshake(volatile unsigned char __iomem *via)
2380 via[B] &= ~TREQ; eieio();
2381 while ((via[B] & TACK) != 0)
2383 via[B] |= TREQ; eieio();
2384 while ((via[B] & TACK) == 0)
2389 polled_send_byte(volatile unsigned char __iomem *via, int x)
2391 via[ACR] |= SR_OUT | SR_EXT; eieio();
2392 via[SR] = x; eieio();
2393 polled_handshake(via);
2397 polled_recv_byte(volatile unsigned char __iomem *via)
2401 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2402 x = via[SR]; eieio();
2403 polled_handshake(via);
2404 x = via[SR]; eieio();
2409 pmu_polled_request(struct adb_request *req)
2411 unsigned long flags;
2413 volatile unsigned char __iomem *v = via;
2417 l = pmu_data_len[c][0];
2418 if (l >= 0 && req->nbytes != l + 1)
2421 local_irq_save(flags);
2422 while (pmu_state != idle)
2425 while ((via[B] & TACK) == 0)
2427 polled_send_byte(v, c);
2429 l = req->nbytes - 1;
2430 polled_send_byte(v, l);
2432 for (i = 1; i <= l; ++i)
2433 polled_send_byte(v, req->data[i]);
2435 l = pmu_data_len[c][1];
2437 l = polled_recv_byte(v);
2438 for (i = 0; i < l; ++i)
2439 req->reply[i + req->reply_len] = polled_recv_byte(v);
2444 local_irq_restore(flags);
2448 /* N.B. This doesn't work on the 3400 */
2449 void pmu_blink(int n)
2451 struct adb_request req;
2453 memset(&req, 0, sizeof(req));
2455 for (; n > 0; --n) {
2462 req.reply[0] = ADB_RET_OK;
2464 req.reply_expected = 0;
2465 pmu_polled_request(&req);
2473 req.reply[0] = ADB_RET_OK;
2475 req.reply_expected = 0;
2476 pmu_polled_request(&req);
2481 #endif /* DEBUG_SLEEP */
2483 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2484 int pmu_sys_suspended;
2486 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2488 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2491 /* Suspend PMU event interrupts */\
2493 pmu_sys_suspended = 1;
2495 #ifdef CONFIG_PMAC_BACKLIGHT
2496 /* Tell backlight code not to muck around with the chip anymore */
2497 pmu_backlight_set_sleep(1);
2503 static int pmu_sys_resume(struct sys_device *sysdev)
2505 struct adb_request req;
2507 if (!pmu_sys_suspended)
2510 /* Tell PMU we are ready */
2511 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2512 pmu_wait_complete(&req);
2514 #ifdef CONFIG_PMAC_BACKLIGHT
2515 /* Tell backlight code it can use the chip again */
2516 pmu_backlight_set_sleep(0);
2518 /* Resume PMU event interrupts */
2520 pmu_sys_suspended = 0;
2525 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2527 static struct sysdev_class pmu_sysclass = {
2531 static struct sys_device device_pmu = {
2532 .cls = &pmu_sysclass,
2535 static struct sysdev_driver driver_pmu = {
2536 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2537 .suspend = &pmu_sys_suspend,
2538 .resume = &pmu_sys_resume,
2539 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2542 static int __init init_pmu_sysfs(void)
2546 rc = sysdev_class_register(&pmu_sysclass);
2548 printk(KERN_ERR "Failed registering PMU sys class\n");
2551 rc = sysdev_register(&device_pmu);
2553 printk(KERN_ERR "Failed registering PMU sys device\n");
2556 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2558 printk(KERN_ERR "Failed registering PMU sys driver\n");
2564 subsys_initcall(init_pmu_sysfs);
2566 EXPORT_SYMBOL(pmu_request);
2567 EXPORT_SYMBOL(pmu_queue_request);
2568 EXPORT_SYMBOL(pmu_poll);
2569 EXPORT_SYMBOL(pmu_poll_adb);
2570 EXPORT_SYMBOL(pmu_wait_complete);
2571 EXPORT_SYMBOL(pmu_suspend);
2572 EXPORT_SYMBOL(pmu_resume);
2573 EXPORT_SYMBOL(pmu_unlock);
2574 #if defined(CONFIG_PPC32)
2575 EXPORT_SYMBOL(pmu_enable_irled);
2576 EXPORT_SYMBOL(pmu_battery_count);
2577 EXPORT_SYMBOL(pmu_batteries);
2578 EXPORT_SYMBOL(pmu_power_flags);
2579 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */