1 // SPDX-License-Identifier: GPL-2.0
3 * Device driver for the via-pmu on Apple Powermacs.
5 * The VIA (versatile interface adapter) interfaces to the PMU,
6 * a 6805 microprocessor core whose primary function is to control
7 * battery charging and system power on the PowerBook 3400 and 2400.
8 * The PMU also controls the ADB (Apple Desktop Bus) which connects
9 * to the keyboard and mouse, as well as the non-volatile RAM
10 * and the RTC (real time clock) chip.
12 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
13 * Copyright (C) 2001-2002 Benjamin Herrenschmidt
14 * Copyright (C) 2006-2007 Johannes Berg
16 * THIS DRIVER IS BECOMING A TOTAL MESS !
17 * - Cleanup atomically disabling reply to PMU events after
18 * a sleep or a freq. switch
22 #include <linux/mutex.h>
23 #include <linux/types.h>
24 #include <linux/errno.h>
25 #include <linux/kernel.h>
26 #include <linux/delay.h>
27 #include <linux/sched/signal.h>
28 #include <linux/miscdevice.h>
29 #include <linux/blkdev.h>
30 #include <linux/pci.h>
31 #include <linux/slab.h>
32 #include <linux/poll.h>
33 #include <linux/adb.h>
34 #include <linux/pmu.h>
35 #include <linux/cuda.h>
36 #include <linux/module.h>
37 #include <linux/spinlock.h>
39 #include <linux/proc_fs.h>
40 #include <linux/seq_file.h>
41 #include <linux/init.h>
42 #include <linux/interrupt.h>
43 #include <linux/device.h>
44 #include <linux/syscore_ops.h>
45 #include <linux/freezer.h>
46 #include <linux/syscalls.h>
47 #include <linux/suspend.h>
48 #include <linux/cpu.h>
49 #include <linux/compat.h>
50 #include <linux/of_address.h>
51 #include <linux/of_irq.h>
53 #include <asm/machdep.h>
55 #include <asm/pgtable.h>
56 #include <asm/sections.h>
58 #include <asm/pmac_feature.h>
59 #include <asm/pmac_pfunc.h>
60 #include <asm/pmac_low_i2c.h>
61 #include <linux/uaccess.h>
62 #include <asm/mmu_context.h>
63 #include <asm/cputable.h>
65 #include <asm/backlight.h>
67 #include "via-pmu-event.h"
69 /* Some compile options */
72 /* Misc minor number allocated for /dev/pmu */
75 /* How many iterations between battery polls */
76 #define BATTERY_POLLING_COUNT 2
78 static DEFINE_MUTEX(pmu_info_proc_mutex);
79 static volatile unsigned char __iomem *via;
81 /* VIA registers - spaced 0x200 bytes apart */
82 #define RS 0x200 /* skip between registers */
83 #define B 0 /* B-side data */
84 #define A RS /* A-side data */
85 #define DIRB (2*RS) /* B-side direction (1=output) */
86 #define DIRA (3*RS) /* A-side direction (1=output) */
87 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
88 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
89 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
90 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
91 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
92 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
93 #define SR (10*RS) /* Shift register */
94 #define ACR (11*RS) /* Auxiliary control register */
95 #define PCR (12*RS) /* Peripheral control register */
96 #define IFR (13*RS) /* Interrupt flag register */
97 #define IER (14*RS) /* Interrupt enable register */
98 #define ANH (15*RS) /* A-side data, no handshake */
100 /* Bits in B data register: both active low */
101 #define TACK 0x08 /* Transfer acknowledge (input) */
102 #define TREQ 0x10 /* Transfer request (output) */
105 #define SR_CTRL 0x1c /* Shift register control bits */
106 #define SR_EXT 0x0c /* Shift on external clock */
107 #define SR_OUT 0x10 /* Shift out if 1 */
109 /* Bits in IFR and IER */
110 #define IER_SET 0x80 /* set bits in IER */
111 #define IER_CLR 0 /* clear bits in IER */
112 #define SR_INT 0x04 /* Shift register full/empty */
114 #define CB1_INT 0x10 /* transition on CB1 input */
116 static volatile enum pmu_state {
125 static volatile enum int_data_state {
130 } int_data_state[2] = { int_data_empty, int_data_empty };
132 static struct adb_request *current_req;
133 static struct adb_request *last_req;
134 static struct adb_request *req_awaiting_reply;
135 static unsigned char interrupt_data[2][32];
136 static int interrupt_data_len[2];
137 static int int_data_last;
138 static unsigned char *reply_ptr;
139 static int data_index;
141 static volatile int adb_int_pending;
142 static volatile int disable_poll;
143 static struct device_node *vias;
144 static int pmu_kind = PMU_UNKNOWN;
145 static int pmu_fully_inited;
146 static int pmu_has_adb;
147 static struct device_node *gpio_node;
148 static unsigned char __iomem *gpio_reg;
149 static int gpio_irq = 0;
150 static int gpio_irq_enabled = -1;
151 static volatile int pmu_suspended;
152 static spinlock_t pmu_lock;
153 static u8 pmu_intr_mask;
154 static int pmu_version;
155 static int drop_interrupts;
156 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
157 static int option_lid_wakeup = 1;
158 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
159 static unsigned long async_req_locks;
160 static unsigned int pmu_irq_stats[11];
162 static struct proc_dir_entry *proc_pmu_root;
163 static struct proc_dir_entry *proc_pmu_info;
164 static struct proc_dir_entry *proc_pmu_irqstats;
165 static struct proc_dir_entry *proc_pmu_options;
166 static int option_server_mode;
168 int pmu_battery_count;
170 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
171 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
172 static int query_batt_timer = BATTERY_POLLING_COUNT;
173 static struct adb_request batt_req;
174 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
180 static int adb_dev_map;
181 static int pmu_adb_flags;
183 static int pmu_probe(void);
184 static int pmu_init(void);
185 static int pmu_send_request(struct adb_request *req, int sync);
186 static int pmu_adb_autopoll(int devs);
187 static int pmu_adb_reset_bus(void);
188 #endif /* CONFIG_ADB */
190 static int init_pmu(void);
191 static void pmu_start(void);
192 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
193 static irqreturn_t gpio1_interrupt(int irq, void *arg);
194 static int pmu_info_proc_show(struct seq_file *m, void *v);
195 static int pmu_irqstats_proc_show(struct seq_file *m, void *v);
196 static int pmu_battery_proc_show(struct seq_file *m, void *v);
197 static void pmu_pass_intr(unsigned char *data, int len);
198 static const struct file_operations pmu_options_proc_fops;
201 const struct adb_driver via_pmu_driver = {
205 .send_request = pmu_send_request,
206 .autopoll = pmu_adb_autopoll,
207 .poll = pmu_poll_adb,
208 .reset_bus = pmu_adb_reset_bus,
210 #endif /* CONFIG_ADB */
212 extern void low_sleep_handler(void);
213 extern void enable_kernel_altivec(void);
214 extern void enable_kernel_fp(void);
217 int pmu_polled_request(struct adb_request *req);
218 void pmu_blink(int n);
222 * This table indicates for each PMU opcode:
223 * - the number of data bytes to be sent with the command, or -1
224 * if a length byte should be sent,
225 * - the number of response bytes which the PMU will return, or
226 * -1 if it will send a length byte.
228 static const s8 pmu_data_len[256][2] = {
229 /* 0 1 2 3 4 5 6 7 */
230 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
231 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
232 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
233 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
234 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
235 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
236 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
237 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
238 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
239 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
240 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
241 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
242 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
243 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
244 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
245 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
246 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
247 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
248 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
249 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
250 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
251 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
252 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
253 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
254 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
255 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
256 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
257 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
258 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
259 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
260 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
261 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
264 static char *pbook_type[] = {
266 "PowerBook 2400/3400/3500(G3)",
267 "PowerBook G3 Series",
272 int __init find_via_pmu(void)
279 vias = of_find_node_by_name(NULL, "via-pmu");
283 reg = of_get_property(vias, "reg", NULL);
285 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
288 taddr = of_translate_address(vias, reg);
289 if (taddr == OF_BAD_ADDR) {
290 printk(KERN_ERR "via-pmu: Can't translate address !\n");
294 spin_lock_init(&pmu_lock);
298 pmu_intr_mask = PMU_INT_PCEJECT |
303 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
304 || of_device_is_compatible(vias->parent, "ohare")))
305 pmu_kind = PMU_OHARE_BASED;
306 else if (of_device_is_compatible(vias->parent, "paddington"))
307 pmu_kind = PMU_PADDINGTON_BASED;
308 else if (of_device_is_compatible(vias->parent, "heathrow"))
309 pmu_kind = PMU_HEATHROW_BASED;
310 else if (of_device_is_compatible(vias->parent, "Keylargo")
311 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
312 struct device_node *gpiop;
313 struct device_node *adbp;
314 u64 gaddr = OF_BAD_ADDR;
316 pmu_kind = PMU_KEYLARGO_BASED;
317 adbp = of_find_node_by_type(NULL, "adb");
318 pmu_has_adb = (adbp != NULL);
320 pmu_intr_mask = PMU_INT_PCEJECT |
326 gpiop = of_find_node_by_name(NULL, "gpio");
328 reg = of_get_property(gpiop, "reg", NULL);
330 gaddr = of_translate_address(gpiop, reg);
331 if (gaddr != OF_BAD_ADDR)
332 gpio_reg = ioremap(gaddr, 0x10);
335 if (gpio_reg == NULL) {
336 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
340 pmu_kind = PMU_UNKNOWN;
342 via = ioremap(taddr, 0x2000);
344 printk(KERN_ERR "via-pmu: Can't map address !\n");
348 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
349 out_8(&via[IFR], 0x7f); /* clear IFR */
356 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
357 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
359 sys_ctrler = SYS_CTRLER_PMU;
376 static int pmu_probe(void)
378 return vias == NULL? -ENODEV: 0;
381 static int __init pmu_init(void)
387 #endif /* CONFIG_ADB */
390 * We can't wait until pmu_init gets called, that happens too late.
391 * It happens after IDE and SCSI initialization, which can take a few
392 * seconds, and by that time the PMU could have given up on us and
394 * Thus this is called with arch_initcall rather than device_initcall.
396 static int __init via_pmu_start(void)
403 batt_req.complete = 1;
405 irq = irq_of_parse_and_map(vias, 0);
407 printk(KERN_ERR "via-pmu: can't map interrupt\n");
410 /* We set IRQF_NO_SUSPEND because we don't want the interrupt
411 * to be disabled between the 2 passes of driver suspend, we
412 * control our own disabling for that one
414 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
415 "VIA-PMU", (void *)0)) {
416 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
420 if (pmu_kind == PMU_KEYLARGO_BASED) {
421 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
422 if (gpio_node == NULL)
423 gpio_node = of_find_node_by_name(NULL,
426 gpio_irq = irq_of_parse_and_map(gpio_node, 0);
429 if (request_irq(gpio_irq, gpio1_interrupt,
430 IRQF_NO_SUSPEND, "GPIO1 ADB",
432 printk(KERN_ERR "pmu: can't get irq %d"
433 " (GPIO1)\n", gpio_irq);
435 gpio_irq_enabled = 1;
439 /* Enable interrupts */
440 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
442 pmu_fully_inited = 1;
444 /* Make sure PMU settle down before continuing. This is _very_ important
445 * since the IDE probe may shut interrupts down for quite a bit of time. If
446 * a PMU communication is pending while this happens, the PMU may timeout
447 * Not that on Core99 machines, the PMU keeps sending us environement
448 * messages, we should find a way to either fix IDE or make it call
449 * pmu_suspend() before masking interrupts. This can also happens while
450 * scolling with some fbdevs.
454 } while (pmu_state != idle);
459 arch_initcall(via_pmu_start);
462 * This has to be done after pci_init, which is a subsys_initcall.
464 static int __init via_pmu_dev_init(void)
469 #ifdef CONFIG_PMAC_BACKLIGHT
470 /* Initialize backlight */
471 pmu_backlight_init();
475 if (of_machine_is_compatible("AAPL,3400/2400") ||
476 of_machine_is_compatible("AAPL,3500")) {
477 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
478 NULL, PMAC_MB_INFO_MODEL, 0);
479 pmu_battery_count = 1;
480 if (mb == PMAC_TYPE_COMET)
481 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
483 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
484 } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
485 of_machine_is_compatible("PowerBook1,1")) {
486 pmu_battery_count = 2;
487 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
488 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
490 struct device_node* prim =
491 of_find_node_by_name(NULL, "power-mgt");
492 const u32 *prim_info = NULL;
494 prim_info = of_get_property(prim, "prim-info", NULL);
496 /* Other stuffs here yet unknown */
497 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
498 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
499 if (pmu_battery_count > 1)
500 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
504 #endif /* CONFIG_PPC32 */
506 /* Create /proc/pmu */
507 proc_pmu_root = proc_mkdir("pmu", NULL);
511 for (i=0; i<pmu_battery_count; i++) {
513 sprintf(title, "battery_%ld", i);
514 proc_pmu_batt[i] = proc_create_single_data(title, 0,
515 proc_pmu_root, pmu_battery_proc_show,
519 proc_pmu_info = proc_create_single("info", 0, proc_pmu_root,
521 proc_pmu_irqstats = proc_create_single("interrupts", 0,
522 proc_pmu_root, pmu_irqstats_proc_show);
523 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
524 &pmu_options_proc_fops);
529 device_initcall(via_pmu_dev_init);
535 struct adb_request req;
537 out_8(&via[B], via[B] | TREQ); /* negate TREQ */
538 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */
540 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
542 while (!req.complete) {
544 printk(KERN_ERR "init_pmu: no response from PMU\n");
551 /* ack all pending interrupts */
553 interrupt_data[0][0] = 1;
554 while (interrupt_data[0][0] || pmu_state != idle) {
556 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
559 if (pmu_state == idle)
561 via_pmu_interrupt(0, NULL);
565 /* Tell PMU we are ready. */
566 if (pmu_kind == PMU_KEYLARGO_BASED) {
567 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
568 while (!req.complete)
572 /* Read PMU version */
573 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
574 pmu_wait_complete(&req);
575 if (req.reply_len > 0)
576 pmu_version = req.reply[0];
578 /* Read server mode setting */
579 if (pmu_kind == PMU_KEYLARGO_BASED) {
580 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
581 PMU_PWR_GET_POWERUP_EVENTS);
582 pmu_wait_complete(&req);
583 if (req.reply_len == 2) {
584 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
585 option_server_mode = 1;
586 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
587 option_server_mode ? "enabled" : "disabled");
599 static void pmu_set_server_mode(int server_mode)
601 struct adb_request req;
603 if (pmu_kind != PMU_KEYLARGO_BASED)
606 option_server_mode = server_mode;
607 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
608 pmu_wait_complete(&req);
609 if (req.reply_len < 2)
612 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
613 PMU_PWR_SET_POWERUP_EVENTS,
614 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
616 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
617 PMU_PWR_CLR_POWERUP_EVENTS,
618 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
619 pmu_wait_complete(&req);
622 /* This new version of the code for 2400/3400/3500 powerbooks
623 * is inspired from the implementation in gkrellm-pmu
626 done_battery_state_ohare(struct adb_request* req)
630 * 0x01 : AC indicator
632 * 0x04 : battery exist
635 * 0x20 : full charged
636 * 0x40 : pcharge reset
637 * 0x80 : battery exist
639 * [1][2] : battery voltage
640 * [3] : CPU temperature
641 * [4] : battery temperature
646 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
647 long pcharge, charge, vb, vmax, lmax;
648 long vmax_charging, vmax_charged;
649 long amperage, voltage, time, max;
650 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
651 NULL, PMAC_MB_INFO_MODEL, 0);
653 if (req->reply[0] & 0x01)
654 pmu_power_flags |= PMU_PWR_AC_PRESENT;
656 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
658 if (mb == PMAC_TYPE_COMET) {
669 /* If battery installed */
670 if (req->reply[0] & 0x04) {
671 bat_flags |= PMU_BATT_PRESENT;
672 if (req->reply[0] & 0x02)
673 bat_flags |= PMU_BATT_CHARGING;
674 vb = (req->reply[1] << 8) | req->reply[2];
675 voltage = (vb * 265 + 72665) / 10;
676 amperage = req->reply[5];
677 if ((req->reply[0] & 0x01) == 0) {
679 vb += ((amperage - 200) * 15)/100;
680 } else if (req->reply[0] & 0x02) {
681 vb = (vb * 97) / 100;
682 vmax = vmax_charging;
684 charge = (100 * vb) / vmax;
685 if (req->reply[0] & 0x40) {
686 pcharge = (req->reply[6] << 8) + req->reply[7];
690 pcharge = 100 - pcharge / lmax;
691 if (pcharge < charge)
695 time = (charge * 16440) / amperage;
699 amperage = -amperage;
701 charge = max = amperage = voltage = time = 0;
703 pmu_batteries[pmu_cur_battery].flags = bat_flags;
704 pmu_batteries[pmu_cur_battery].charge = charge;
705 pmu_batteries[pmu_cur_battery].max_charge = max;
706 pmu_batteries[pmu_cur_battery].amperage = amperage;
707 pmu_batteries[pmu_cur_battery].voltage = voltage;
708 pmu_batteries[pmu_cur_battery].time_remaining = time;
710 clear_bit(0, &async_req_locks);
714 done_battery_state_smart(struct adb_request* req)
717 * [0] : format of this structure (known: 3,4,5)
730 * [4][5] : max charge
735 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
737 unsigned int capa, max, voltage;
739 if (req->reply[1] & 0x01)
740 pmu_power_flags |= PMU_PWR_AC_PRESENT;
742 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
745 capa = max = amperage = voltage = 0;
747 if (req->reply[1] & 0x04) {
748 bat_flags |= PMU_BATT_PRESENT;
749 switch(req->reply[0]) {
751 case 4: capa = req->reply[2];
753 amperage = *((signed char *)&req->reply[4]);
754 voltage = req->reply[5];
756 case 5: capa = (req->reply[2] << 8) | req->reply[3];
757 max = (req->reply[4] << 8) | req->reply[5];
758 amperage = *((signed short *)&req->reply[6]);
759 voltage = (req->reply[8] << 8) | req->reply[9];
762 pr_warn("pmu.c: unrecognized battery info, "
763 "len: %d, %4ph\n", req->reply_len,
769 if ((req->reply[1] & 0x01) && (amperage > 0))
770 bat_flags |= PMU_BATT_CHARGING;
772 pmu_batteries[pmu_cur_battery].flags = bat_flags;
773 pmu_batteries[pmu_cur_battery].charge = capa;
774 pmu_batteries[pmu_cur_battery].max_charge = max;
775 pmu_batteries[pmu_cur_battery].amperage = amperage;
776 pmu_batteries[pmu_cur_battery].voltage = voltage;
778 if ((req->reply[1] & 0x01) && (amperage > 0))
779 pmu_batteries[pmu_cur_battery].time_remaining
780 = ((max-capa) * 3600) / amperage;
782 pmu_batteries[pmu_cur_battery].time_remaining
783 = (capa * 3600) / (-amperage);
785 pmu_batteries[pmu_cur_battery].time_remaining = 0;
787 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
789 clear_bit(0, &async_req_locks);
793 query_battery_state(void)
795 if (test_and_set_bit(0, &async_req_locks))
797 if (pmu_kind == PMU_OHARE_BASED)
798 pmu_request(&batt_req, done_battery_state_ohare,
799 1, PMU_BATTERY_STATE);
801 pmu_request(&batt_req, done_battery_state_smart,
802 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
805 static int pmu_info_proc_show(struct seq_file *m, void *v)
807 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
808 seq_printf(m, "PMU firmware version : %02x\n", pmu_version);
809 seq_printf(m, "AC Power : %d\n",
810 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
811 seq_printf(m, "Battery count : %d\n", pmu_battery_count);
816 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
819 static const char *irq_names[] = {
820 "Total CB1 triggered events",
821 "Total GPIO1 triggered events",
822 "PC-Card eject button",
823 "Sound/Brightness button",
825 "Battery state change",
826 "Environment interrupt",
828 "Ghost interrupt (zero len)",
829 "Empty interrupt (empty mask)",
833 for (i=0; i<11; i++) {
834 seq_printf(m, " %2u: %10u (%s)\n",
835 i, pmu_irq_stats[i], irq_names[i]);
840 static int pmu_battery_proc_show(struct seq_file *m, void *v)
842 long batnum = (long)m->private;
845 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags);
846 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge);
847 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
848 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage);
849 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage);
850 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining);
854 static int pmu_options_proc_show(struct seq_file *m, void *v)
856 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
857 if (pmu_kind == PMU_KEYLARGO_BASED &&
858 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
859 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
861 if (pmu_kind == PMU_KEYLARGO_BASED)
862 seq_printf(m, "server_mode=%d\n", option_server_mode);
867 static int pmu_options_proc_open(struct inode *inode, struct file *file)
869 return single_open(file, pmu_options_proc_show, NULL);
872 static ssize_t pmu_options_proc_write(struct file *file,
873 const char __user *buffer, size_t count, loff_t *pos)
877 size_t fcount = count;
883 if (copy_from_user(tmp, buffer, count))
891 while(*val && (*val != '=')) {
901 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
902 if (pmu_kind == PMU_KEYLARGO_BASED &&
903 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
904 if (!strcmp(label, "lid_wakeup"))
905 option_lid_wakeup = ((*val) == '1');
907 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
909 new_value = ((*val) == '1');
910 if (new_value != option_server_mode)
911 pmu_set_server_mode(new_value);
916 static const struct file_operations pmu_options_proc_fops = {
917 .owner = THIS_MODULE,
918 .open = pmu_options_proc_open,
921 .release = single_release,
922 .write = pmu_options_proc_write,
926 /* Send an ADB command */
927 static int pmu_send_request(struct adb_request *req, int sync)
931 if ((vias == NULL) || (!pmu_fully_inited)) {
938 switch (req->data[0]) {
940 for (i = 0; i < req->nbytes - 1; ++i)
941 req->data[i] = req->data[i+1];
943 if (pmu_data_len[req->data[0]][1] != 0) {
944 req->reply[0] = ADB_RET_OK;
948 ret = pmu_queue_request(req);
951 switch (req->data[1]) {
953 if (req->nbytes != 2)
955 req->data[0] = PMU_READ_RTC;
958 req->reply[0] = CUDA_PACKET;
960 req->reply[2] = CUDA_GET_TIME;
961 ret = pmu_queue_request(req);
964 if (req->nbytes != 6)
966 req->data[0] = PMU_SET_RTC;
968 for (i = 1; i <= 4; ++i)
969 req->data[i] = req->data[i+1];
971 req->reply[0] = CUDA_PACKET;
973 req->reply[2] = CUDA_SET_TIME;
974 ret = pmu_queue_request(req);
981 for (i = req->nbytes - 1; i > 1; --i)
982 req->data[i+2] = req->data[i];
983 req->data[3] = req->nbytes - 2;
984 req->data[2] = pmu_adb_flags;
985 /*req->data[1] = req->data[1];*/
986 req->data[0] = PMU_ADB_CMD;
988 req->reply_expected = 1;
990 ret = pmu_queue_request(req);
999 while (!req->complete)
1005 /* Enable/disable autopolling */
1006 static int __pmu_adb_autopoll(int devs)
1008 struct adb_request req;
1011 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1012 adb_dev_map >> 8, adb_dev_map);
1015 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1018 while (!req.complete)
1023 static int pmu_adb_autopoll(int devs)
1025 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1029 return __pmu_adb_autopoll(devs);
1032 /* Reset the ADB bus */
1033 static int pmu_adb_reset_bus(void)
1035 struct adb_request req;
1036 int save_autopoll = adb_dev_map;
1038 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1041 /* anyone got a better idea?? */
1042 __pmu_adb_autopoll(0);
1046 req.data[0] = PMU_ADB_CMD;
1047 req.data[1] = ADB_BUSRESET;
1052 req.reply_expected = 1;
1053 if (pmu_queue_request(&req) != 0) {
1054 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1057 pmu_wait_complete(&req);
1059 if (save_autopoll != 0)
1060 __pmu_adb_autopoll(save_autopoll);
1064 #endif /* CONFIG_ADB */
1066 /* Construct and send a pmu request */
1068 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1077 if (nbytes < 0 || nbytes > 32) {
1078 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1082 req->nbytes = nbytes;
1084 va_start(list, nbytes);
1085 for (i = 0; i < nbytes; ++i)
1086 req->data[i] = va_arg(list, int);
1089 req->reply_expected = 0;
1090 return pmu_queue_request(req);
1094 pmu_queue_request(struct adb_request *req)
1096 unsigned long flags;
1103 if (req->nbytes <= 0) {
1107 nsend = pmu_data_len[req->data[0]][0];
1108 if (nsend >= 0 && req->nbytes != nsend + 1) {
1117 spin_lock_irqsave(&pmu_lock, flags);
1119 last_req->next = req;
1124 if (pmu_state == idle)
1127 spin_unlock_irqrestore(&pmu_lock, flags);
1135 /* Sightly increased the delay, I had one occurrence of the message
1139 while ((in_8(&via[B]) & TACK) == 0) {
1140 if (--timeout < 0) {
1141 printk(KERN_ERR "PMU not responding (!ack)\n");
1148 /* New PMU seems to be very sensitive to those timings, so we make sure
1149 * PCI is flushed immediately */
1153 volatile unsigned char __iomem *v = via;
1155 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1157 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
1164 volatile unsigned char __iomem *v = via;
1166 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1167 in_8(&v[SR]); /* resets SR */
1168 out_8(&v[B], in_8(&v[B]) & ~TREQ);
1173 pmu_done(struct adb_request *req)
1175 void (*done)(struct adb_request *) = req->done;
1178 /* Here, we assume that if the request has a done member, the
1179 * struct request will survive to setting req->complete to 1
1188 struct adb_request *req;
1190 /* assert pmu_state == idle */
1191 /* get the packet to send */
1193 if (!req || pmu_state != idle
1194 || (/*req->reply_expected && */req_awaiting_reply))
1197 pmu_state = sending;
1199 data_len = pmu_data_len[req->data[0]][0];
1201 /* Sounds safer to make sure ACK is high before writing. This helped
1202 * kill a problem with ADB and some iBooks
1205 /* set the shift register to shift out and send a byte */
1206 send_byte(req->data[0]);
1216 via_pmu_interrupt(0, NULL);
1226 /* Kicks ADB read when PMU is suspended */
1227 adb_int_pending = 1;
1229 via_pmu_interrupt(0, NULL);
1230 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1231 || req_awaiting_reply));
1235 pmu_wait_complete(struct adb_request *req)
1239 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1240 via_pmu_interrupt(0, NULL);
1243 /* This function loops until the PMU is idle and prevents it from
1244 * anwsering to ADB interrupts. pmu_request can still be called.
1245 * This is done to avoid spurrious shutdowns when we know we'll have
1246 * interrupts switched off for a long time
1251 unsigned long flags;
1256 spin_lock_irqsave(&pmu_lock, flags);
1258 if (pmu_suspended > 1) {
1259 spin_unlock_irqrestore(&pmu_lock, flags);
1264 spin_unlock_irqrestore(&pmu_lock, flags);
1265 if (req_awaiting_reply)
1266 adb_int_pending = 1;
1267 via_pmu_interrupt(0, NULL);
1268 spin_lock_irqsave(&pmu_lock, flags);
1269 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1271 disable_irq_nosync(gpio_irq);
1272 out_8(&via[IER], CB1_INT | IER_CLR);
1273 spin_unlock_irqrestore(&pmu_lock, flags);
1282 unsigned long flags;
1284 if (!via || (pmu_suspended < 1))
1287 spin_lock_irqsave(&pmu_lock, flags);
1289 if (pmu_suspended > 0) {
1290 spin_unlock_irqrestore(&pmu_lock, flags);
1293 adb_int_pending = 1;
1295 enable_irq(gpio_irq);
1296 out_8(&via[IER], CB1_INT | IER_SET);
1297 spin_unlock_irqrestore(&pmu_lock, flags);
1301 /* Interrupt data could be the result data from an ADB cmd */
1303 pmu_handle_data(unsigned char *data, int len)
1305 unsigned char ints, pirq;
1309 if (drop_interrupts || len < 1) {
1310 adb_int_pending = 0;
1315 /* Get PMU interrupt mask */
1318 /* Record zero interrupts for stats */
1322 /* Hack to deal with ADB autopoll flag */
1323 if (ints & PMU_INT_ADB)
1324 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1329 if (i > pmu_irq_stats[10])
1330 pmu_irq_stats[10] = i;
1334 for (pirq = 0; pirq < 8; pirq++)
1335 if (ints & (1 << pirq))
1337 pmu_irq_stats[pirq]++;
1339 ints &= ~(1 << pirq);
1341 /* Note: for some reason, we get an interrupt with len=1,
1342 * data[0]==0 after each normal ADB interrupt, at least
1343 * on the Pismo. Still investigating... --BenH
1345 if ((1 << pirq) & PMU_INT_ADB) {
1346 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1347 struct adb_request *req = req_awaiting_reply;
1349 printk(KERN_ERR "PMU: extra ADB reply\n");
1352 req_awaiting_reply = NULL;
1356 memcpy(req->reply, data + 1, len - 1);
1357 req->reply_len = len - 1;
1361 if (len == 4 && data[1] == 0x2c) {
1362 extern int xmon_wants_key, xmon_adb_keycode;
1363 if (xmon_wants_key) {
1364 xmon_adb_keycode = data[2];
1370 * XXX On the [23]400 the PMU gives us an up
1371 * event for keycodes 0x74 or 0x75 when the PC
1372 * card eject buttons are released, so we
1373 * ignore those events.
1375 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1376 && data[1] == 0x2c && data[3] == 0xff
1377 && (data[2] & ~1) == 0xf4))
1378 adb_input(data+1, len-1, 1);
1379 #endif /* CONFIG_ADB */
1382 /* Sound/brightness button pressed */
1383 else if ((1 << pirq) & PMU_INT_SNDBRT) {
1384 #ifdef CONFIG_PMAC_BACKLIGHT
1386 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1389 /* Tick interrupt */
1390 else if ((1 << pirq) & PMU_INT_TICK) {
1391 /* Environement or tick interrupt, query batteries */
1392 if (pmu_battery_count) {
1393 if ((--query_batt_timer) == 0) {
1394 query_battery_state();
1395 query_batt_timer = BATTERY_POLLING_COUNT;
1399 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1400 if (pmu_battery_count)
1401 query_battery_state();
1402 pmu_pass_intr(data, len);
1403 /* len == 6 is probably a bad check. But how do I
1404 * know what PMU versions send what events here? */
1406 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1407 via_pmu_event(PMU_EVT_LID, data[1]&1);
1410 pmu_pass_intr(data, len);
1415 static struct adb_request*
1418 struct adb_request *req;
1421 if (via[B] & TREQ) {
1422 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1423 out_8(&via[IFR], SR_INT);
1426 /* The ack may not yet be low when we get the interrupt */
1427 while ((in_8(&via[B]) & TACK) != 0)
1430 /* if reading grab the byte, and reset the interrupt */
1431 if (pmu_state == reading || pmu_state == reading_intr)
1432 bite = in_8(&via[SR]);
1434 /* reset TREQ and wait for TACK to go high */
1435 out_8(&via[B], in_8(&via[B]) | TREQ);
1438 switch (pmu_state) {
1442 data_len = req->nbytes - 1;
1443 send_byte(data_len);
1446 if (data_index <= data_len) {
1447 send_byte(req->data[data_index++]);
1451 data_len = pmu_data_len[req->data[0]][1];
1452 if (data_len == 0) {
1454 current_req = req->next;
1455 if (req->reply_expected)
1456 req_awaiting_reply = req;
1460 pmu_state = reading;
1462 reply_ptr = req->reply + req->reply_len;
1470 pmu_state = reading_intr;
1471 reply_ptr = interrupt_data[int_data_last];
1473 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1474 enable_irq(gpio_irq);
1475 gpio_irq_enabled = 1;
1481 if (data_len == -1) {
1484 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1485 } else if (data_index < 32) {
1486 reply_ptr[data_index++] = bite;
1488 if (data_index < data_len) {
1493 if (pmu_state == reading_intr) {
1495 int_data_state[int_data_last] = int_data_ready;
1496 interrupt_data_len[int_data_last] = data_len;
1500 * For PMU sleep and freq change requests, we lock the
1501 * PMU until it's explicitly unlocked. This avoids any
1502 * spurrious event polling getting in
1504 current_req = req->next;
1505 req->reply_len += data_index;
1506 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1515 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1522 via_pmu_interrupt(int irq, void *arg)
1524 unsigned long flags;
1528 struct adb_request *req = NULL;
1531 /* This is a bit brutal, we can probably do better */
1532 spin_lock_irqsave(&pmu_lock, flags);
1536 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1540 if (++nloop > 1000) {
1541 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1542 "intr=%x, ier=%x pmu_state=%d\n",
1543 intr, in_8(&via[IER]), pmu_state);
1546 out_8(&via[IFR], intr);
1547 if (intr & CB1_INT) {
1548 adb_int_pending = 1;
1551 if (intr & SR_INT) {
1552 req = pmu_sr_intr();
1559 if (pmu_state == idle) {
1560 if (adb_int_pending) {
1561 if (int_data_state[0] == int_data_empty)
1563 else if (int_data_state[1] == int_data_empty)
1568 int_data_state[int_data_last] = int_data_fill;
1569 /* Sounds safer to make sure ACK is high before writing.
1570 * This helped kill a problem with ADB and some iBooks
1573 send_byte(PMU_INT_ACK);
1574 adb_int_pending = 0;
1575 } else if (current_req)
1579 /* Mark the oldest buffer for flushing */
1580 if (int_data_state[!int_data_last] == int_data_ready) {
1581 int_data_state[!int_data_last] = int_data_flush;
1582 int_data = !int_data_last;
1583 } else if (int_data_state[int_data_last] == int_data_ready) {
1584 int_data_state[int_data_last] = int_data_flush;
1585 int_data = int_data_last;
1588 spin_unlock_irqrestore(&pmu_lock, flags);
1590 /* Deal with completed PMU requests outside of the lock */
1596 /* Deal with interrupt datas outside of the lock */
1597 if (int_data >= 0) {
1598 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1599 spin_lock_irqsave(&pmu_lock, flags);
1601 int_data_state[int_data] = int_data_empty;
1606 return IRQ_RETVAL(handled);
1612 unsigned long flags;
1614 spin_lock_irqsave(&pmu_lock, flags);
1615 if (pmu_state == locked)
1617 adb_int_pending = 1;
1618 spin_unlock_irqrestore(&pmu_lock, flags);
1623 gpio1_interrupt(int irq, void *arg)
1625 unsigned long flags;
1627 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1628 spin_lock_irqsave(&pmu_lock, flags);
1629 if (gpio_irq_enabled > 0) {
1630 disable_irq_nosync(gpio_irq);
1631 gpio_irq_enabled = 0;
1634 adb_int_pending = 1;
1635 spin_unlock_irqrestore(&pmu_lock, flags);
1636 via_pmu_interrupt(0, NULL);
1643 pmu_enable_irled(int on)
1645 struct adb_request req;
1649 if (pmu_kind == PMU_KEYLARGO_BASED)
1652 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1653 (on ? PMU_POW_ON : PMU_POW_OFF));
1654 pmu_wait_complete(&req);
1660 struct adb_request req;
1665 local_irq_disable();
1667 drop_interrupts = 1;
1669 if (pmu_kind != PMU_KEYLARGO_BASED) {
1670 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1672 while(!req.complete)
1676 pmu_request(&req, NULL, 1, PMU_RESET);
1677 pmu_wait_complete(&req);
1685 struct adb_request req;
1690 local_irq_disable();
1692 drop_interrupts = 1;
1694 if (pmu_kind != PMU_KEYLARGO_BASED) {
1695 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1697 pmu_wait_complete(&req);
1699 /* Disable server mode on shutdown or we'll just
1702 pmu_set_server_mode(0);
1705 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1706 'M', 'A', 'T', 'T');
1707 pmu_wait_complete(&req);
1718 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1720 * Put the powerbook to sleep.
1723 static u32 save_via[8];
1726 save_via_state(void)
1728 save_via[0] = in_8(&via[ANH]);
1729 save_via[1] = in_8(&via[DIRA]);
1730 save_via[2] = in_8(&via[B]);
1731 save_via[3] = in_8(&via[DIRB]);
1732 save_via[4] = in_8(&via[PCR]);
1733 save_via[5] = in_8(&via[ACR]);
1734 save_via[6] = in_8(&via[T1CL]);
1735 save_via[7] = in_8(&via[T1CH]);
1738 restore_via_state(void)
1740 out_8(&via[ANH], save_via[0]);
1741 out_8(&via[DIRA], save_via[1]);
1742 out_8(&via[B], save_via[2]);
1743 out_8(&via[DIRB], save_via[3]);
1744 out_8(&via[PCR], save_via[4]);
1745 out_8(&via[ACR], save_via[5]);
1746 out_8(&via[T1CL], save_via[6]);
1747 out_8(&via[T1CH], save_via[7]);
1748 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
1749 out_8(&via[IFR], 0x7f); /* clear IFR */
1750 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1753 #define GRACKLE_PM (1<<7)
1754 #define GRACKLE_DOZE (1<<5)
1755 #define GRACKLE_NAP (1<<4)
1756 #define GRACKLE_SLEEP (1<<3)
1758 static int powerbook_sleep_grackle(void)
1760 unsigned long save_l2cr;
1761 unsigned short pmcr1;
1762 struct adb_request req;
1763 struct pci_dev *grackle;
1765 grackle = pci_get_domain_bus_and_slot(0, 0, 0);
1769 /* Turn off various things. Darwin does some retry tests here... */
1770 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1771 pmu_wait_complete(&req);
1772 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1773 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1774 pmu_wait_complete(&req);
1776 /* For 750, save backside cache setting and disable it */
1777 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1779 if (!__fake_sleep) {
1780 /* Ask the PMU to put us to sleep */
1781 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1782 pmu_wait_complete(&req);
1785 /* The VIA is supposed not to be restored correctly*/
1787 /* We shut down some HW */
1788 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1790 pci_read_config_word(grackle, 0x70, &pmcr1);
1791 /* Apparently, MacOS uses NAP mode for Grackle ??? */
1792 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1793 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1794 pci_write_config_word(grackle, 0x70, pmcr1);
1796 /* Call low-level ASM sleep handler */
1800 low_sleep_handler();
1802 /* We're awake again, stop grackle PM */
1803 pci_read_config_word(grackle, 0x70, &pmcr1);
1804 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1805 pci_write_config_word(grackle, 0x70, pmcr1);
1807 pci_dev_put(grackle);
1809 /* Make sure the PMU is idle */
1810 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1811 restore_via_state();
1813 /* Restore L2 cache */
1814 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1815 _set_L2CR(save_l2cr);
1817 /* Restore userland MMU context */
1818 switch_mmu_context(NULL, current->active_mm, NULL);
1820 /* Power things up */
1822 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1823 pmu_wait_complete(&req);
1824 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1825 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1826 pmu_wait_complete(&req);
1827 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1828 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1829 pmu_wait_complete(&req);
1835 powerbook_sleep_Core99(void)
1837 unsigned long save_l2cr;
1838 unsigned long save_l3cr;
1839 struct adb_request req;
1841 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1842 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1846 if (num_online_cpus() > 1 || cpu_is_offline(0))
1849 /* Stop environment and ADB interrupts */
1850 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1851 pmu_wait_complete(&req);
1853 /* Tell PMU what events will wake us up */
1854 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1856 pmu_wait_complete(&req);
1857 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1858 0, PMU_PWR_WAKEUP_KEY |
1859 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1860 pmu_wait_complete(&req);
1862 /* Save the state of the L2 and L3 caches */
1863 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
1864 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1866 if (!__fake_sleep) {
1867 /* Ask the PMU to put us to sleep */
1868 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1869 pmu_wait_complete(&req);
1872 /* The VIA is supposed not to be restored correctly*/
1875 /* Shut down various ASICs. There's a chance that we can no longer
1876 * talk to the PMU after this, so I moved it to _after_ sending the
1877 * sleep command to it. Still need to be checked.
1879 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1881 /* Call low-level ASM sleep handler */
1885 low_sleep_handler();
1887 /* Restore Apple core ASICs state */
1888 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1891 restore_via_state();
1893 /* tweak LPJ before cpufreq is there */
1894 loops_per_jiffy *= 2;
1897 pmac_call_early_video_resume();
1899 /* Restore L2 cache */
1900 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1901 _set_L2CR(save_l2cr);
1902 /* Restore L3 cache */
1903 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1904 _set_L3CR(save_l3cr);
1906 /* Restore userland MMU context */
1907 switch_mmu_context(NULL, current->active_mm, NULL);
1909 /* Tell PMU we are ready */
1911 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1912 pmu_wait_complete(&req);
1913 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1914 pmu_wait_complete(&req);
1916 /* Restore LPJ, cpufreq will adjust the cpu frequency */
1917 loops_per_jiffy /= 2;
1922 #define PB3400_MEM_CTRL 0xf8000000
1923 #define PB3400_MEM_CTRL_SLEEP 0x70
1925 static void __iomem *pb3400_mem_ctrl;
1927 static void powerbook_sleep_init_3400(void)
1929 /* map in the memory controller registers */
1930 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1931 if (pb3400_mem_ctrl == NULL)
1932 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1935 static int powerbook_sleep_3400(void)
1940 struct adb_request sleep_req;
1941 unsigned int __iomem *mem_ctrl_sleep;
1943 if (pb3400_mem_ctrl == NULL)
1945 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1947 /* Set the memory controller to keep the memory refreshed
1948 while we're asleep */
1949 for (i = 0x403f; i >= 0x4000; --i) {
1950 out_be32(mem_ctrl_sleep, i);
1952 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1958 /* Ask the PMU to put us to sleep */
1959 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1960 pmu_wait_complete(&sleep_req);
1963 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1967 /* Put the CPU into sleep mode */
1968 hid0 = mfspr(SPRN_HID0);
1969 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
1970 mtspr(SPRN_HID0, hid0);
1972 msr = mfmsr() | MSR_POW;
1978 local_irq_disable();
1980 /* OK, we're awake again, start restoring things */
1981 out_be32(mem_ctrl_sleep, 0x3f);
1982 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1987 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
1990 * Support for /dev/pmu device
1992 #define RB_SIZE 0x10
1993 struct pmu_private {
1994 struct list_head list;
1999 unsigned char data[16];
2001 wait_queue_head_t wait;
2003 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2004 int backlight_locker;
2008 static LIST_HEAD(all_pmu_pvt);
2009 static DEFINE_SPINLOCK(all_pvt_lock);
2012 pmu_pass_intr(unsigned char *data, int len)
2014 struct pmu_private *pp;
2015 struct list_head *list;
2017 unsigned long flags;
2019 if (len > sizeof(pp->rb_buf[0].data))
2020 len = sizeof(pp->rb_buf[0].data);
2021 spin_lock_irqsave(&all_pvt_lock, flags);
2022 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2023 pp = list_entry(list, struct pmu_private, list);
2024 spin_lock(&pp->lock);
2028 if (i != pp->rb_get) {
2029 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2031 memcpy(rp->data, data, len);
2033 wake_up_interruptible(&pp->wait);
2035 spin_unlock(&pp->lock);
2037 spin_unlock_irqrestore(&all_pvt_lock, flags);
2041 pmu_open(struct inode *inode, struct file *file)
2043 struct pmu_private *pp;
2044 unsigned long flags;
2046 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2049 pp->rb_get = pp->rb_put = 0;
2050 spin_lock_init(&pp->lock);
2051 init_waitqueue_head(&pp->wait);
2052 mutex_lock(&pmu_info_proc_mutex);
2053 spin_lock_irqsave(&all_pvt_lock, flags);
2054 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2055 pp->backlight_locker = 0;
2057 list_add(&pp->list, &all_pmu_pvt);
2058 spin_unlock_irqrestore(&all_pvt_lock, flags);
2059 file->private_data = pp;
2060 mutex_unlock(&pmu_info_proc_mutex);
2065 pmu_read(struct file *file, char __user *buf,
2066 size_t count, loff_t *ppos)
2068 struct pmu_private *pp = file->private_data;
2069 DECLARE_WAITQUEUE(wait, current);
2070 unsigned long flags;
2073 if (count < 1 || !pp)
2075 if (!access_ok(VERIFY_WRITE, buf, count))
2078 spin_lock_irqsave(&pp->lock, flags);
2079 add_wait_queue(&pp->wait, &wait);
2080 set_current_state(TASK_INTERRUPTIBLE);
2084 if (pp->rb_get != pp->rb_put) {
2086 struct rb_entry *rp = &pp->rb_buf[i];
2088 spin_unlock_irqrestore(&pp->lock, flags);
2091 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2095 spin_lock_irqsave(&pp->lock, flags);
2100 if (file->f_flags & O_NONBLOCK)
2103 if (signal_pending(current))
2105 spin_unlock_irqrestore(&pp->lock, flags);
2107 spin_lock_irqsave(&pp->lock, flags);
2109 __set_current_state(TASK_RUNNING);
2110 remove_wait_queue(&pp->wait, &wait);
2111 spin_unlock_irqrestore(&pp->lock, flags);
2117 pmu_write(struct file *file, const char __user *buf,
2118 size_t count, loff_t *ppos)
2124 pmu_fpoll(struct file *filp, poll_table *wait)
2126 struct pmu_private *pp = filp->private_data;
2128 unsigned long flags;
2132 poll_wait(filp, &pp->wait, wait);
2133 spin_lock_irqsave(&pp->lock, flags);
2134 if (pp->rb_get != pp->rb_put)
2136 spin_unlock_irqrestore(&pp->lock, flags);
2141 pmu_release(struct inode *inode, struct file *file)
2143 struct pmu_private *pp = file->private_data;
2144 unsigned long flags;
2147 file->private_data = NULL;
2148 spin_lock_irqsave(&all_pvt_lock, flags);
2149 list_del(&pp->list);
2150 spin_unlock_irqrestore(&all_pvt_lock, flags);
2152 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2153 if (pp->backlight_locker)
2154 pmac_backlight_enable();
2162 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2163 static void pmac_suspend_disable_irqs(void)
2165 /* Call platform functions marked "on sleep" */
2166 pmac_pfunc_i2c_suspend();
2167 pmac_pfunc_base_suspend();
2170 static int powerbook_sleep(suspend_state_t state)
2174 /* Wait for completion of async requests */
2175 while (!batt_req.complete)
2178 /* Giveup the lazy FPU & vec so we don't have to back them
2179 * up from the low level code
2183 #ifdef CONFIG_ALTIVEC
2184 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2185 enable_kernel_altivec();
2186 #endif /* CONFIG_ALTIVEC */
2189 case PMU_OHARE_BASED:
2190 error = powerbook_sleep_3400();
2192 case PMU_HEATHROW_BASED:
2193 case PMU_PADDINGTON_BASED:
2194 error = powerbook_sleep_grackle();
2196 case PMU_KEYLARGO_BASED:
2197 error = powerbook_sleep_Core99();
2211 static void pmac_suspend_enable_irqs(void)
2213 /* Force a poll of ADB interrupts */
2214 adb_int_pending = 1;
2215 via_pmu_interrupt(0, NULL);
2219 /* Call platform functions marked "on wake" */
2220 pmac_pfunc_base_resume();
2221 pmac_pfunc_i2c_resume();
2224 static int pmu_sleep_valid(suspend_state_t state)
2226 return state == PM_SUSPEND_MEM
2227 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2230 static const struct platform_suspend_ops pmu_pm_ops = {
2231 .enter = powerbook_sleep,
2232 .valid = pmu_sleep_valid,
2235 static int register_pmu_pm_ops(void)
2237 if (pmu_kind == PMU_OHARE_BASED)
2238 powerbook_sleep_init_3400();
2239 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2240 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2241 suspend_set_ops(&pmu_pm_ops);
2246 device_initcall(register_pmu_pm_ops);
2249 static int pmu_ioctl(struct file *filp,
2250 u_int cmd, u_long arg)
2252 __u32 __user *argp = (__u32 __user *)arg;
2253 int error = -EINVAL;
2257 if (!capable(CAP_SYS_ADMIN))
2259 return pm_suspend(PM_SUSPEND_MEM);
2260 case PMU_IOC_CAN_SLEEP:
2261 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2262 return put_user(0, argp);
2264 return put_user(1, argp);
2266 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2267 /* Compatibility ioctl's for backlight */
2268 case PMU_IOC_GET_BACKLIGHT:
2272 brightness = pmac_backlight_get_legacy_brightness();
2276 return put_user(brightness, argp);
2279 case PMU_IOC_SET_BACKLIGHT:
2283 error = get_user(brightness, argp);
2287 return pmac_backlight_set_legacy_brightness(brightness);
2289 #ifdef CONFIG_INPUT_ADBHID
2290 case PMU_IOC_GRAB_BACKLIGHT: {
2291 struct pmu_private *pp = filp->private_data;
2293 if (pp->backlight_locker)
2296 pp->backlight_locker = 1;
2297 pmac_backlight_disable();
2301 #endif /* CONFIG_INPUT_ADBHID */
2302 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2304 case PMU_IOC_GET_MODEL:
2305 return put_user(pmu_kind, argp);
2306 case PMU_IOC_HAS_ADB:
2307 return put_user(pmu_has_adb, argp);
2312 static long pmu_unlocked_ioctl(struct file *filp,
2313 u_int cmd, u_long arg)
2317 mutex_lock(&pmu_info_proc_mutex);
2318 ret = pmu_ioctl(filp, cmd, arg);
2319 mutex_unlock(&pmu_info_proc_mutex);
2324 #ifdef CONFIG_COMPAT
2325 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2326 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2327 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t)
2328 #define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t)
2329 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t)
2330 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2332 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2337 case PMU_IOC_GET_BACKLIGHT32:
2338 cmd = PMU_IOC_GET_BACKLIGHT;
2340 case PMU_IOC_SET_BACKLIGHT32:
2341 cmd = PMU_IOC_SET_BACKLIGHT;
2343 case PMU_IOC_GET_MODEL32:
2344 cmd = PMU_IOC_GET_MODEL;
2346 case PMU_IOC_HAS_ADB32:
2347 cmd = PMU_IOC_HAS_ADB;
2349 case PMU_IOC_CAN_SLEEP32:
2350 cmd = PMU_IOC_CAN_SLEEP;
2352 case PMU_IOC_GRAB_BACKLIGHT32:
2353 cmd = PMU_IOC_GRAB_BACKLIGHT;
2356 return -ENOIOCTLCMD;
2358 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2362 static const struct file_operations pmu_device_fops = {
2366 .unlocked_ioctl = pmu_unlocked_ioctl,
2367 #ifdef CONFIG_COMPAT
2368 .compat_ioctl = compat_pmu_ioctl,
2371 .release = pmu_release,
2372 .llseek = noop_llseek,
2375 static struct miscdevice pmu_device = {
2376 PMU_MINOR, "pmu", &pmu_device_fops
2379 static int pmu_device_init(void)
2383 if (misc_register(&pmu_device) < 0)
2384 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2387 device_initcall(pmu_device_init);
2392 polled_handshake(volatile unsigned char __iomem *via)
2394 via[B] &= ~TREQ; eieio();
2395 while ((via[B] & TACK) != 0)
2397 via[B] |= TREQ; eieio();
2398 while ((via[B] & TACK) == 0)
2403 polled_send_byte(volatile unsigned char __iomem *via, int x)
2405 via[ACR] |= SR_OUT | SR_EXT; eieio();
2406 via[SR] = x; eieio();
2407 polled_handshake(via);
2411 polled_recv_byte(volatile unsigned char __iomem *via)
2415 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2416 x = via[SR]; eieio();
2417 polled_handshake(via);
2418 x = via[SR]; eieio();
2423 pmu_polled_request(struct adb_request *req)
2425 unsigned long flags;
2427 volatile unsigned char __iomem *v = via;
2431 l = pmu_data_len[c][0];
2432 if (l >= 0 && req->nbytes != l + 1)
2435 local_irq_save(flags);
2436 while (pmu_state != idle)
2439 while ((via[B] & TACK) == 0)
2441 polled_send_byte(v, c);
2443 l = req->nbytes - 1;
2444 polled_send_byte(v, l);
2446 for (i = 1; i <= l; ++i)
2447 polled_send_byte(v, req->data[i]);
2449 l = pmu_data_len[c][1];
2451 l = polled_recv_byte(v);
2452 for (i = 0; i < l; ++i)
2453 req->reply[i + req->reply_len] = polled_recv_byte(v);
2458 local_irq_restore(flags);
2462 /* N.B. This doesn't work on the 3400 */
2463 void pmu_blink(int n)
2465 struct adb_request req;
2467 memset(&req, 0, sizeof(req));
2469 for (; n > 0; --n) {
2476 req.reply[0] = ADB_RET_OK;
2478 req.reply_expected = 0;
2479 pmu_polled_request(&req);
2487 req.reply[0] = ADB_RET_OK;
2489 req.reply_expected = 0;
2490 pmu_polled_request(&req);
2495 #endif /* DEBUG_SLEEP */
2497 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2498 int pmu_sys_suspended;
2500 static int pmu_syscore_suspend(void)
2502 /* Suspend PMU event interrupts */
2504 pmu_sys_suspended = 1;
2506 #ifdef CONFIG_PMAC_BACKLIGHT
2507 /* Tell backlight code not to muck around with the chip anymore */
2508 pmu_backlight_set_sleep(1);
2514 static void pmu_syscore_resume(void)
2516 struct adb_request req;
2518 if (!pmu_sys_suspended)
2521 /* Tell PMU we are ready */
2522 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2523 pmu_wait_complete(&req);
2525 #ifdef CONFIG_PMAC_BACKLIGHT
2526 /* Tell backlight code it can use the chip again */
2527 pmu_backlight_set_sleep(0);
2529 /* Resume PMU event interrupts */
2531 pmu_sys_suspended = 0;
2534 static struct syscore_ops pmu_syscore_ops = {
2535 .suspend = pmu_syscore_suspend,
2536 .resume = pmu_syscore_resume,
2539 static int pmu_syscore_register(void)
2541 register_syscore_ops(&pmu_syscore_ops);
2545 subsys_initcall(pmu_syscore_register);
2546 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2548 EXPORT_SYMBOL(pmu_request);
2549 EXPORT_SYMBOL(pmu_queue_request);
2550 EXPORT_SYMBOL(pmu_poll);
2551 EXPORT_SYMBOL(pmu_poll_adb);
2552 EXPORT_SYMBOL(pmu_wait_complete);
2553 EXPORT_SYMBOL(pmu_suspend);
2554 EXPORT_SYMBOL(pmu_resume);
2555 EXPORT_SYMBOL(pmu_unlock);
2556 #if defined(CONFIG_PPC32)
2557 EXPORT_SYMBOL(pmu_enable_irled);
2558 EXPORT_SYMBOL(pmu_battery_count);
2559 EXPORT_SYMBOL(pmu_batteries);
2560 EXPORT_SYMBOL(pmu_power_flags);
2561 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */