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[PATCH] 2/5 powerpc: Rework PowerMac i2c part 2
[deliverable/linux.git] / drivers / macintosh / via-pmu.c
CommitLineData
1da177e4
LT		 1/*
2 * Device driver for the via-pmu on Apple Powermacs.
3 *
4 * The VIA (versatile interface adapter) interfaces to the PMU,
5 * a 6805 microprocessor core whose primary function is to control
6 * battery charging and system power on the PowerBook 3400 and 2400.
7 * The PMU also controls the ADB (Apple Desktop Bus) which connects
8 * to the keyboard and mouse, as well as the non-volatile RAM
9 * and the RTC (real time clock) chip.
10 *
11 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
12 * Copyright (C) 2001-2002 Benjamin Herrenschmidt
13 *
14 * THIS DRIVER IS BECOMING A TOTAL MESS !
15 * - Cleanup atomically disabling reply to PMU events after
16 * a sleep or a freq. switch
17 * - Move sleep code out of here to pmac_pm, merge into new
18 * common PM infrastructure
19 * - Move backlight code out as well
20 * - Save/Restore PCI space properly
21 *
22 */
23#include <stdarg.h>
24#include <linux/config.h>
25#include <linux/types.h>
26#include <linux/errno.h>
27#include <linux/kernel.h>
28#include <linux/delay.h>
29#include <linux/sched.h>
30#include <linux/miscdevice.h>
31#include <linux/blkdev.h>
32#include <linux/pci.h>
33#include <linux/slab.h>
34#include <linux/poll.h>
35#include <linux/adb.h>
36#include <linux/pmu.h>
37#include <linux/cuda.h>
38#include <linux/smp_lock.h>
39#include <linux/module.h>
40#include <linux/spinlock.h>
41#include <linux/pm.h>
42#include <linux/proc_fs.h>
43#include <linux/init.h>
44#include <linux/interrupt.h>
45#include <linux/device.h>
46#include <linux/sysdev.h>
47#include <linux/suspend.h>
48#include <linux/syscalls.h>
49#include <linux/cpu.h>
50#include <asm/prom.h>
51#include <asm/machdep.h>
52#include <asm/io.h>
53#include <asm/pgtable.h>
54#include <asm/system.h>
55#include <asm/sections.h>
56#include <asm/irq.h>
57#include <asm/pmac_feature.h>
58#include <asm/uaccess.h>
59#include <asm/mmu_context.h>
60#include <asm/cputable.h>
61#include <asm/time.h>
62#ifdef CONFIG_PMAC_BACKLIGHT
63#include <asm/backlight.h>
64#endif
65
e4ee69c8
BH		 66#ifdef CONFIG_PPC32
67#include <asm/open_pic.h>
68#endif
69
1da177e4
LT		 70/* Some compile options */
71#undef SUSPEND_USES_PMU
72#define DEBUG_SLEEP
73#undef HACKED_PCI_SAVE
74
75/* Misc minor number allocated for /dev/pmu */
76#define PMU_MINOR 154
77
78/* How many iterations between battery polls */
79#define BATTERY_POLLING_COUNT 2
80
81static volatile unsigned char __iomem *via;
82
83/* VIA registers - spaced 0x200 bytes apart */
84#define RS 0x200 /* skip between registers */
85#define B 0 /* B-side data */
86#define A RS /* A-side data */
87#define DIRB (2*RS) /* B-side direction (1=output) */
88#define DIRA (3*RS) /* A-side direction (1=output) */
89#define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
90#define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
91#define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
92#define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
93#define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
94#define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
95#define SR (10*RS) /* Shift register */
96#define ACR (11*RS) /* Auxiliary control register */
97#define PCR (12*RS) /* Peripheral control register */
98#define IFR (13*RS) /* Interrupt flag register */
99#define IER (14*RS) /* Interrupt enable register */
100#define ANH (15*RS) /* A-side data, no handshake */
101
102/* Bits in B data register: both active low */
103#define TACK 0x08 /* Transfer acknowledge (input) */
104#define TREQ 0x10 /* Transfer request (output) */
105
106/* Bits in ACR */
107#define SR_CTRL 0x1c /* Shift register control bits */
108#define SR_EXT 0x0c /* Shift on external clock */
109#define SR_OUT 0x10 /* Shift out if 1 */
110
111/* Bits in IFR and IER */
112#define IER_SET 0x80 /* set bits in IER */
113#define IER_CLR 0 /* clear bits in IER */
114#define SR_INT 0x04 /* Shift register full/empty */
115#define CB2_INT 0x08
116#define CB1_INT 0x10 /* transition on CB1 input */
117
118static volatile enum pmu_state {
119 idle,
120 sending,
121 intack,
122 reading,
123 reading_intr,
124 locked,
125} pmu_state;
126
127static volatile enum int_data_state {
128 int_data_empty,
129 int_data_fill,
130 int_data_ready,
131 int_data_flush
132} int_data_state[2] = { int_data_empty, int_data_empty };
133
134static struct adb_request *current_req;
135static struct adb_request *last_req;
136static struct adb_request *req_awaiting_reply;
137static unsigned char interrupt_data[2][32];
138static int interrupt_data_len[2];
139static int int_data_last;
140static unsigned char *reply_ptr;
141static int data_index;
142static int data_len;
143static volatile int adb_int_pending;
144static volatile int disable_poll;
145static struct adb_request bright_req_1, bright_req_2;
146static struct device_node *vias;
147static int pmu_kind = PMU_UNKNOWN;
148static int pmu_fully_inited = 0;
149static int pmu_has_adb;
51d3082f 150static struct device_node *gpio_node;
1da177e4
LT		 151static unsigned char __iomem *gpio_reg = NULL;
152static int gpio_irq = -1;
153static int gpio_irq_enabled = -1;
154static volatile int pmu_suspended = 0;
155static spinlock_t pmu_lock;
156static u8 pmu_intr_mask;
157static int pmu_version;
158static int drop_interrupts;
a0005034 159#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1da177e4 160static int option_lid_wakeup = 1;
a0005034 161#endif /* CONFIG_PM && CONFIG_PPC32 */
a04c8780 162static int sleep_in_progress;
1da177e4
LT		 163static unsigned long async_req_locks;
164static unsigned int pmu_irq_stats[11];
165
166static struct proc_dir_entry *proc_pmu_root;
167static struct proc_dir_entry *proc_pmu_info;
168static struct proc_dir_entry *proc_pmu_irqstats;
169static struct proc_dir_entry *proc_pmu_options;
170static int option_server_mode;
171
1da177e4
LT		 172int pmu_battery_count;
173int pmu_cur_battery;
174unsigned int pmu_power_flags;
175struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
176static int query_batt_timer = BATTERY_POLLING_COUNT;
177static struct adb_request batt_req;
178static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
1da177e4
LT		 179
180#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
181extern int disable_kernel_backlight;
182#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
183
184int __fake_sleep;
185int asleep;
186struct notifier_block *sleep_notifier_list;
187
188#ifdef CONFIG_ADB
189static int adb_dev_map = 0;
190static int pmu_adb_flags;
191
192static int pmu_probe(void);
193static int pmu_init(void);
194static int pmu_send_request(struct adb_request *req, int sync);
195static int pmu_adb_autopoll(int devs);
196static int pmu_adb_reset_bus(void);
197#endif /* CONFIG_ADB */
198
199static int init_pmu(void);
1da177e4
LT		 200static void pmu_start(void);
201static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
202static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
203static int proc_get_info(char *page, char **start, off_t off,
204 int count, int *eof, void *data);
205static int proc_get_irqstats(char *page, char **start, off_t off,
206 int count, int *eof, void *data);
207#ifdef CONFIG_PMAC_BACKLIGHT
208static int pmu_set_backlight_level(int level, void* data);
209static int pmu_set_backlight_enable(int on, int level, void* data);
210#endif /* CONFIG_PMAC_BACKLIGHT */
1da177e4
LT		 211static void pmu_pass_intr(unsigned char *data, int len);
212static int proc_get_batt(char *page, char **start, off_t off,
213 int count, int *eof, void *data);
1da177e4
LT		 214static int proc_read_options(char *page, char **start, off_t off,
215 int count, int *eof, void *data);
216static int proc_write_options(struct file *file, const char __user *buffer,
217 unsigned long count, void *data);
218
219#ifdef CONFIG_ADB
220struct adb_driver via_pmu_driver = {
221 "PMU",
222 pmu_probe,
223 pmu_init,
224 pmu_send_request,
225 pmu_adb_autopoll,
226 pmu_poll_adb,
227 pmu_adb_reset_bus
228};
229#endif /* CONFIG_ADB */
230
231extern void low_sleep_handler(void);
232extern void enable_kernel_altivec(void);
233extern void enable_kernel_fp(void);
234
235#ifdef DEBUG_SLEEP
236int pmu_polled_request(struct adb_request *req);
237int pmu_wink(struct adb_request *req);
238#endif
239
240/*
241 * This table indicates for each PMU opcode:
242 * - the number of data bytes to be sent with the command, or -1
243 * if a length byte should be sent,
244 * - the number of response bytes which the PMU will return, or
245 * -1 if it will send a length byte.
246 */
aacaf9bd 247static const s8 pmu_data_len[256][2] = {
1da177e4
LT		 248/* 0 1 2 3 4 5 6 7 */
249/*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
250/*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
251/*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
252/*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
253/*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
254/*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
255/*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
256/*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
257/*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
258/*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
259/*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
260/*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
261/*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
262/*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
263/*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
264/*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
265/*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
266/*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
267/*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
268/*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
269/*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
270/*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
271/*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
272/*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
273/*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
274/*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
275/*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
276/*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
277/*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
278/*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
279/*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
280/*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
281};
282
283static char *pbook_type[] = {
284 "Unknown PowerBook",
285 "PowerBook 2400/3400/3500(G3)",
286 "PowerBook G3 Series",
287 "1999 PowerBook G3",
288 "Core99"
289};
290
291#ifdef CONFIG_PMAC_BACKLIGHT
292static struct backlight_controller pmu_backlight_controller = {
293 pmu_set_backlight_enable,
294 pmu_set_backlight_level
295};
296#endif /* CONFIG_PMAC_BACKLIGHT */
297
51d3082f 298int __init find_via_pmu(void)
1da177e4 299{
cc5d0189 300 u64 taddr;
51d3082f
BH		 301 u32 *reg;
302
1da177e4
LT		 303 if (via != 0)
304 return 1;
51d3082f
BH		 305 vias = of_find_node_by_name(NULL, "via-pmu");
306 if (vias == NULL)
1da177e4 307 return 0;
1da177e4 308
51d3082f
BH		 309 reg = (u32 *)get_property(vias, "reg", NULL);
310 if (reg == NULL) {
311 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
312 goto fail;
313 }
314 taddr = of_translate_address(vias, reg);
bb6b9b28 315 if (taddr == OF_BAD_ADDR) {
51d3082f
BH		 316 printk(KERN_ERR "via-pmu: Can't translate address !\n");
317 goto fail;
1da177e4
LT		 318 }
319
320 spin_lock_init(&pmu_lock);
321
322 pmu_has_adb = 1;
323
324 pmu_intr_mask = PMU_INT_PCEJECT |
325 PMU_INT_SNDBRT |
326 PMU_INT_ADB |
327 PMU_INT_TICK;
328
329 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
330 || device_is_compatible(vias->parent, "ohare")))
331 pmu_kind = PMU_OHARE_BASED;
332 else if (device_is_compatible(vias->parent, "paddington"))
333 pmu_kind = PMU_PADDINGTON_BASED;
334 else if (device_is_compatible(vias->parent, "heathrow"))
335 pmu_kind = PMU_HEATHROW_BASED;
336 else if (device_is_compatible(vias->parent, "Keylargo")
337 || device_is_compatible(vias->parent, "K2-Keylargo")) {
51d3082f 338 struct device_node *gpiop;
cc5d0189 339 u64 gaddr = OF_BAD_ADDR;
1da177e4
LT		 340
341 pmu_kind = PMU_KEYLARGO_BASED;
342 pmu_has_adb = (find_type_devices("adb") != NULL);
343 pmu_intr_mask = PMU_INT_PCEJECT |
344 PMU_INT_SNDBRT |
345 PMU_INT_ADB |
346 PMU_INT_TICK |
347 PMU_INT_ENVIRONMENT;
348
51d3082f
BH		 349 gpiop = of_find_node_by_name(NULL, "gpio");
350 if (gpiop) {
351 reg = (u32 *)get_property(gpiop, "reg", NULL);
352 if (reg)
353 gaddr = of_translate_address(gpiop, reg);
cc5d0189 354 if (gaddr != OF_BAD_ADDR)
51d3082f 355 gpio_reg = ioremap(gaddr, 0x10);
1da177e4 356 }
51d3082f
BH		 357 if (gpio_reg == NULL)
358 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
1da177e4
LT		 359 } else
360 pmu_kind = PMU_UNKNOWN;
361
51d3082f
BH		 362 via = ioremap(taddr, 0x2000);
363 if (via == NULL) {
364 printk(KERN_ERR "via-pmu: Can't map address !\n");
365 goto fail;
366 }
1da177e4
LT		 367
368 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
369 out_8(&via[IFR], 0x7f); /* clear IFR */
370
371 pmu_state = idle;
372
373 if (!init_pmu()) {
374 via = NULL;
375 return 0;
376 }
377
bb6b9b28 378 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
1da177e4
LT		 379 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
380
381 sys_ctrler = SYS_CTRLER_PMU;
382
383 return 1;
51d3082f
BH		 384 fail:
385 of_node_put(vias);
386 vias = NULL;
387 return 0;
1da177e4
LT		 388}
389
390#ifdef CONFIG_ADB
51d3082f 391static int pmu_probe(void)
1da177e4
LT		 392{
393 return vias == NULL? -ENODEV: 0;
394}
395
51d3082f 396static int __init pmu_init(void)
1da177e4
LT		 397{
398 if (vias == NULL)
399 return -ENODEV;
400 return 0;
401}
402#endif /* CONFIG_ADB */
403
404/*
405 * We can't wait until pmu_init gets called, that happens too late.
406 * It happens after IDE and SCSI initialization, which can take a few
407 * seconds, and by that time the PMU could have given up on us and
408 * turned us off.
409 * Thus this is called with arch_initcall rather than device_initcall.
410 */
411static int __init via_pmu_start(void)
412{
413 if (vias == NULL)
414 return -ENODEV;
415
416 bright_req_1.complete = 1;
417 bright_req_2.complete = 1;
1da177e4 418 batt_req.complete = 1;
1da177e4 419
51d3082f 420#ifndef CONFIG_PPC_MERGE
e4ee69c8
BH		 421 if (pmu_kind == PMU_KEYLARGO_BASED)
422 openpic_set_irq_priority(vias->intrs[0].line,
423 OPENPIC_PRIORITY_DEFAULT + 1);
424#endif
425
1da177e4
LT		 426 if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU",
427 (void *)0)) {
428 printk(KERN_ERR "VIA-PMU: can't get irq %d\n",
429 vias->intrs[0].line);
430 return -EAGAIN;
431 }
432
51d3082f
BH		 433 if (pmu_kind == PMU_KEYLARGO_BASED) {
434 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
435 if (gpio_node == NULL)
436 gpio_node = of_find_node_by_name(NULL,
437 "pmu-interrupt");
438 if (gpio_node && gpio_node->n_intrs > 0)
439 gpio_irq = gpio_node->intrs[0].line;
440
441 if (gpio_irq != -1) {
442 if (request_irq(gpio_irq, gpio1_interrupt, 0,
443 "GPIO1 ADB", (void *)0))
444 printk(KERN_ERR "pmu: can't get irq %d"
445 " (GPIO1)\n", gpio_irq);
446 else
447 gpio_irq_enabled = 1;
448 }
1da177e4
LT		 449 }
450
451 /* Enable interrupts */
452 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
453
454 pmu_fully_inited = 1;
455
456 /* Make sure PMU settle down before continuing. This is _very_ important
457 * since the IDE probe may shut interrupts down for quite a bit of time. If
458 * a PMU communication is pending while this happens, the PMU may timeout
459 * Not that on Core99 machines, the PMU keeps sending us environement
460 * messages, we should find a way to either fix IDE or make it call
461 * pmu_suspend() before masking interrupts. This can also happens while
462 * scolling with some fbdevs.
463 */
464 do {
465 pmu_poll();
466 } while (pmu_state != idle);
467
468 return 0;
469}
470
471arch_initcall(via_pmu_start);
472
473/*
474 * This has to be done after pci_init, which is a subsys_initcall.
475 */
476static int __init via_pmu_dev_init(void)
477{
478 if (vias == NULL)
479 return -ENODEV;
480
1da177e4
LT		 481#ifdef CONFIG_PMAC_BACKLIGHT
482 /* Enable backlight */
483 register_backlight_controller(&pmu_backlight_controller, NULL, "pmu");
484#endif /* CONFIG_PMAC_BACKLIGHT */
485
8c870933 486#ifdef CONFIG_PPC32
1da177e4
LT		 487 if (machine_is_compatible("AAPL,3400/2400") ||
488 machine_is_compatible("AAPL,3500")) {
489 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
490 NULL, PMAC_MB_INFO_MODEL, 0);
491 pmu_battery_count = 1;
492 if (mb == PMAC_TYPE_COMET)
493 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
494 else
495 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
496 } else if (machine_is_compatible("AAPL,PowerBook1998") ||
497 machine_is_compatible("PowerBook1,1")) {
498 pmu_battery_count = 2;
499 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
500 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
501 } else {
502 struct device_node* prim = find_devices("power-mgt");
503 u32 *prim_info = NULL;
504 if (prim)
505 prim_info = (u32 *)get_property(prim, "prim-info", NULL);
506 if (prim_info) {
507 /* Other stuffs here yet unknown */
508 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
509 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
510 if (pmu_battery_count > 1)
511 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
512 }
513 }
8c870933
BH		 514#endif /* CONFIG_PPC32 */
515
1da177e4
LT		 516 /* Create /proc/pmu */
517 proc_pmu_root = proc_mkdir("pmu", NULL);
518 if (proc_pmu_root) {
8c870933 519 long i;
1da177e4
LT		 520
521 for (i=0; i<pmu_battery_count; i++) {
522 char title[16];
8c870933 523 sprintf(title, "battery_%ld", i);
1da177e4
LT		 524 proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
525 proc_get_batt, (void *)i);
526 }
1da177e4
LT		 527
528 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
529 proc_get_info, NULL);
530 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
531 proc_get_irqstats, NULL);
532 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
533 if (proc_pmu_options) {
534 proc_pmu_options->nlink = 1;
535 proc_pmu_options->read_proc = proc_read_options;
536 proc_pmu_options->write_proc = proc_write_options;
537 }
538 }
539 return 0;
540}
541
542device_initcall(via_pmu_dev_init);
543
aacaf9bd 544static int
1da177e4
LT		 545init_pmu(void)
546{
547 int timeout;
548 struct adb_request req;
549
550 out_8(&via[B], via[B] | TREQ); /* negate TREQ */
551 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */
552
553 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
554 timeout = 100000;
555 while (!req.complete) {
556 if (--timeout < 0) {
557 printk(KERN_ERR "init_pmu: no response from PMU\n");
558 return 0;
559 }
560 udelay(10);
561 pmu_poll();
562 }
563
564 /* ack all pending interrupts */
565 timeout = 100000;
566 interrupt_data[0][0] = 1;
567 while (interrupt_data[0][0] || pmu_state != idle) {
568 if (--timeout < 0) {
569 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
570 return 0;
571 }
572 if (pmu_state == idle)
573 adb_int_pending = 1;
574 via_pmu_interrupt(0, NULL, NULL);
575 udelay(10);
576 }
577
578 /* Tell PMU we are ready. */
579 if (pmu_kind == PMU_KEYLARGO_BASED) {
580 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
581 while (!req.complete)
582 pmu_poll();
583 }
584
585 /* Read PMU version */
586 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
587 pmu_wait_complete(&req);
588 if (req.reply_len > 0)
589 pmu_version = req.reply[0];
590
591 /* Read server mode setting */
592 if (pmu_kind == PMU_KEYLARGO_BASED) {
593 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
594 PMU_PWR_GET_POWERUP_EVENTS);
595 pmu_wait_complete(&req);
596 if (req.reply_len == 2) {
597 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
598 option_server_mode = 1;
599 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
600 option_server_mode ? "enabled" : "disabled");
601 }
602 }
603 return 1;
604}
605
606int
607pmu_get_model(void)
608{
609 return pmu_kind;
610}
611
1da177e4
LT		 612static void pmu_set_server_mode(int server_mode)
613{
614 struct adb_request req;
615
616 if (pmu_kind != PMU_KEYLARGO_BASED)
617 return;
618
619 option_server_mode = server_mode;
620 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
621 pmu_wait_complete(&req);
622 if (req.reply_len < 2)
623 return;
624 if (server_mode)
625 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
626 PMU_PWR_SET_POWERUP_EVENTS,
627 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
628 else
629 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
630 PMU_PWR_CLR_POWERUP_EVENTS,
631 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
632 pmu_wait_complete(&req);
633}
634
1da177e4
LT		 635/* This new version of the code for 2400/3400/3500 powerbooks
636 * is inspired from the implementation in gkrellm-pmu
637 */
aacaf9bd 638static void
1da177e4
LT		 639done_battery_state_ohare(struct adb_request* req)
640{
641 /* format:
642 * [0] : flags
643 * 0x01 : AC indicator
644 * 0x02 : charging
645 * 0x04 : battery exist
646 * 0x08 :
647 * 0x10 :
648 * 0x20 : full charged
649 * 0x40 : pcharge reset
650 * 0x80 : battery exist
651 *
652 * [1][2] : battery voltage
653 * [3] : CPU temperature
654 * [4] : battery temperature
655 * [5] : current
656 * [6][7] : pcharge
657 * --tkoba
658 */
659 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
660 long pcharge, charge, vb, vmax, lmax;
661 long vmax_charging, vmax_charged;
662 long amperage, voltage, time, max;
663 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
664 NULL, PMAC_MB_INFO_MODEL, 0);
665
666 if (req->reply[0] & 0x01)
667 pmu_power_flags |= PMU_PWR_AC_PRESENT;
668 else
669 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
670
671 if (mb == PMAC_TYPE_COMET) {
672 vmax_charged = 189;
673 vmax_charging = 213;
674 lmax = 6500;
675 } else {
676 vmax_charged = 330;
677 vmax_charging = 330;
678 lmax = 6500;
679 }
680 vmax = vmax_charged;
681
682 /* If battery installed */
683 if (req->reply[0] & 0x04) {
684 bat_flags |= PMU_BATT_PRESENT;
685 if (req->reply[0] & 0x02)
686 bat_flags |= PMU_BATT_CHARGING;
687 vb = (req->reply[1] << 8) | req->reply[2];
688 voltage = (vb * 265 + 72665) / 10;
689 amperage = req->reply[5];
690 if ((req->reply[0] & 0x01) == 0) {
691 if (amperage > 200)
692 vb += ((amperage - 200) * 15)/100;
693 } else if (req->reply[0] & 0x02) {
694 vb = (vb * 97) / 100;
695 vmax = vmax_charging;
696 }
697 charge = (100 * vb) / vmax;
698 if (req->reply[0] & 0x40) {
699 pcharge = (req->reply[6] << 8) + req->reply[7];
700 if (pcharge > lmax)
701 pcharge = lmax;
702 pcharge *= 100;
703 pcharge = 100 - pcharge / lmax;
704 if (pcharge < charge)
705 charge = pcharge;
706 }
707 if (amperage > 0)
708 time = (charge * 16440) / amperage;
709 else
710 time = 0;
711 max = 100;
712 amperage = -amperage;
713 } else
714 charge = max = amperage = voltage = time = 0;
715
716 pmu_batteries[pmu_cur_battery].flags = bat_flags;
717 pmu_batteries[pmu_cur_battery].charge = charge;
718 pmu_batteries[pmu_cur_battery].max_charge = max;
719 pmu_batteries[pmu_cur_battery].amperage = amperage;
720 pmu_batteries[pmu_cur_battery].voltage = voltage;
721 pmu_batteries[pmu_cur_battery].time_remaining = time;
722
723 clear_bit(0, &async_req_locks);
724}
725
aacaf9bd 726static void
1da177e4
LT		 727done_battery_state_smart(struct adb_request* req)
728{
729 /* format:
730 * [0] : format of this structure (known: 3,4,5)
731 * [1] : flags
732 *
733 * format 3 & 4:
734 *
735 * [2] : charge
736 * [3] : max charge
737 * [4] : current
738 * [5] : voltage
739 *
740 * format 5:
741 *
742 * [2][3] : charge
743 * [4][5] : max charge
744 * [6][7] : current
745 * [8][9] : voltage
746 */
747
748 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
749 int amperage;
750 unsigned int capa, max, voltage;
751
752 if (req->reply[1] & 0x01)
753 pmu_power_flags |= PMU_PWR_AC_PRESENT;
754 else
755 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
756
757
758 capa = max = amperage = voltage = 0;
759
760 if (req->reply[1] & 0x04) {
761 bat_flags |= PMU_BATT_PRESENT;
762 switch(req->reply[0]) {
763 case 3:
764 case 4: capa = req->reply[2];
765 max = req->reply[3];
766 amperage = *((signed char *)&req->reply[4]);
767 voltage = req->reply[5];
768 break;
769 case 5: capa = (req->reply[2] << 8) | req->reply[3];
770 max = (req->reply[4] << 8) | req->reply[5];
771 amperage = *((signed short *)&req->reply[6]);
772 voltage = (req->reply[8] << 8) | req->reply[9];
773 break;
774 default:
775 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
776 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
777 break;
778 }
779 }
780
781 if ((req->reply[1] & 0x01) && (amperage > 0))
782 bat_flags |= PMU_BATT_CHARGING;
783
784 pmu_batteries[pmu_cur_battery].flags = bat_flags;
785 pmu_batteries[pmu_cur_battery].charge = capa;
786 pmu_batteries[pmu_cur_battery].max_charge = max;
787 pmu_batteries[pmu_cur_battery].amperage = amperage;
788 pmu_batteries[pmu_cur_battery].voltage = voltage;
789 if (amperage) {
790 if ((req->reply[1] & 0x01) && (amperage > 0))
791 pmu_batteries[pmu_cur_battery].time_remaining
792 = ((max-capa) * 3600) / amperage;
793 else
794 pmu_batteries[pmu_cur_battery].time_remaining
795 = (capa * 3600) / (-amperage);
796 } else
797 pmu_batteries[pmu_cur_battery].time_remaining = 0;
798
799 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
800
801 clear_bit(0, &async_req_locks);
802}
803
aacaf9bd 804static void
1da177e4
LT		 805query_battery_state(void)
806{
807 if (test_and_set_bit(0, &async_req_locks))
808 return;
809 if (pmu_kind == PMU_OHARE_BASED)
810 pmu_request(&batt_req, done_battery_state_ohare,
811 1, PMU_BATTERY_STATE);
812 else
813 pmu_request(&batt_req, done_battery_state_smart,
814 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
815}
816
aacaf9bd 817static int
1da177e4
LT		 818proc_get_info(char *page, char **start, off_t off,
819 int count, int *eof, void *data)
820{
821 char* p = page;
822
823 p += sprintf(p, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
824 p += sprintf(p, "PMU firmware version : %02x\n", pmu_version);
1da177e4
LT		 825 p += sprintf(p, "AC Power : %d\n",
826 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0));
827 p += sprintf(p, "Battery count : %d\n", pmu_battery_count);
1da177e4
LT		 828
829 return p - page;
830}
831
aacaf9bd 832static int
1da177e4
LT		 833proc_get_irqstats(char *page, char **start, off_t off,
834 int count, int *eof, void *data)
835{
836 int i;
837 char* p = page;
838 static const char *irq_names[] = {
839 "Total CB1 triggered events",
840 "Total GPIO1 triggered events",
841 "PC-Card eject button",
842 "Sound/Brightness button",
843 "ADB message",
844 "Battery state change",
845 "Environment interrupt",
846 "Tick timer",
847 "Ghost interrupt (zero len)",
848 "Empty interrupt (empty mask)",
849 "Max irqs in a row"
850 };
851
852 for (i=0; i<11; i++) {
853 p += sprintf(p, " %2u: %10u (%s)\n",
854 i, pmu_irq_stats[i], irq_names[i]);
855 }
856 return p - page;
857}
858
aacaf9bd 859static int
1da177e4
LT		 860proc_get_batt(char *page, char **start, off_t off,
861 int count, int *eof, void *data)
862{
8c870933 863 long batnum = (long)data;
1da177e4
LT		 864 char *p = page;
865
866 p += sprintf(p, "\n");
867 p += sprintf(p, "flags : %08x\n",
868 pmu_batteries[batnum].flags);
869 p += sprintf(p, "charge : %d\n",
870 pmu_batteries[batnum].charge);
871 p += sprintf(p, "max_charge : %d\n",
872 pmu_batteries[batnum].max_charge);
873 p += sprintf(p, "current : %d\n",
874 pmu_batteries[batnum].amperage);
875 p += sprintf(p, "voltage : %d\n",
876 pmu_batteries[batnum].voltage);
877 p += sprintf(p, "time rem. : %d\n",
878 pmu_batteries[batnum].time_remaining);
879
880 return p - page;
881}
1da177e4 882
aacaf9bd 883static int
1da177e4
LT		 884proc_read_options(char *page, char **start, off_t off,
885 int count, int *eof, void *data)
886{
887 char *p = page;
888
a0005034 889#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1da177e4
LT		 890 if (pmu_kind == PMU_KEYLARGO_BASED &&
891 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
892 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
8c870933 893#endif
1da177e4
LT		 894 if (pmu_kind == PMU_KEYLARGO_BASED)
895 p += sprintf(p, "server_mode=%d\n", option_server_mode);
896
897 return p - page;
898}
899
aacaf9bd 900static int
1da177e4
LT		 901proc_write_options(struct file *file, const char __user *buffer,
902 unsigned long count, void *data)
903{
904 char tmp[33];
905 char *label, *val;
906 unsigned long fcount = count;
907
908 if (!count)
909 return -EINVAL;
910 if (count > 32)
911 count = 32;
912 if (copy_from_user(tmp, buffer, count))
913 return -EFAULT;
914 tmp[count] = 0;
915
916 label = tmp;
917 while(*label == ' ')
918 label++;
919 val = label;
920 while(*val && (*val != '=')) {
921 if (*val == ' ')
922 *val = 0;
923 val++;
924 }
925 if ((*val) == 0)
926 return -EINVAL;
927 *(val++) = 0;
928 while(*val == ' ')
929 val++;
a0005034 930#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1da177e4
LT		 931 if (pmu_kind == PMU_KEYLARGO_BASED &&
932 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
933 if (!strcmp(label, "lid_wakeup"))
934 option_lid_wakeup = ((*val) == '1');
8c870933 935#endif
1da177e4
LT		 936 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
937 int new_value;
938 new_value = ((*val) == '1');
939 if (new_value != option_server_mode)
940 pmu_set_server_mode(new_value);
941 }
942 return fcount;
943}
944
945#ifdef CONFIG_ADB
946/* Send an ADB command */
aacaf9bd 947static int
1da177e4
LT		 948pmu_send_request(struct adb_request *req, int sync)
949{
950 int i, ret;
951
952 if ((vias == NULL) || (!pmu_fully_inited)) {
953 req->complete = 1;
954 return -ENXIO;
955 }
956
957 ret = -EINVAL;
958
959 switch (req->data[0]) {
960 case PMU_PACKET:
961 for (i = 0; i < req->nbytes - 1; ++i)
962 req->data[i] = req->data[i+1];
963 --req->nbytes;
964 if (pmu_data_len[req->data[0]][1] != 0) {
965 req->reply[0] = ADB_RET_OK;
966 req->reply_len = 1;
967 } else
968 req->reply_len = 0;
969 ret = pmu_queue_request(req);
970 break;
971 case CUDA_PACKET:
972 switch (req->data[1]) {
973 case CUDA_GET_TIME:
974 if (req->nbytes != 2)
975 break;
976 req->data[0] = PMU_READ_RTC;
977 req->nbytes = 1;
978 req->reply_len = 3;
979 req->reply[0] = CUDA_PACKET;
980 req->reply[1] = 0;
981 req->reply[2] = CUDA_GET_TIME;
982 ret = pmu_queue_request(req);
983 break;
984 case CUDA_SET_TIME:
985 if (req->nbytes != 6)
986 break;
987 req->data[0] = PMU_SET_RTC;
988 req->nbytes = 5;
989 for (i = 1; i <= 4; ++i)
990 req->data[i] = req->data[i+1];
991 req->reply_len = 3;
992 req->reply[0] = CUDA_PACKET;
993 req->reply[1] = 0;
994 req->reply[2] = CUDA_SET_TIME;
995 ret = pmu_queue_request(req);
996 break;
997 }
998 break;
999 case ADB_PACKET:
1000 if (!pmu_has_adb)
1001 return -ENXIO;
1002 for (i = req->nbytes - 1; i > 1; --i)
1003 req->data[i+2] = req->data[i];
1004 req->data[3] = req->nbytes - 2;
1005 req->data[2] = pmu_adb_flags;
1006 /*req->data[1] = req->data[1];*/
1007 req->data[0] = PMU_ADB_CMD;
1008 req->nbytes += 2;
1009 req->reply_expected = 1;
1010 req->reply_len = 0;
1011 ret = pmu_queue_request(req);
1012 break;
1013 }
1014 if (ret) {
1015 req->complete = 1;
1016 return ret;
1017 }
1018
1019 if (sync)
1020 while (!req->complete)
1021 pmu_poll();
1022
1023 return 0;
1024}
1025
1026/* Enable/disable autopolling */
aacaf9bd 1027static int
1da177e4
LT		 1028pmu_adb_autopoll(int devs)
1029{
1030 struct adb_request req;
1031
1032 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1033 return -ENXIO;
1034
1035 if (devs) {
1036 adb_dev_map = devs;
1037 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1038 adb_dev_map >> 8, adb_dev_map);
1039 pmu_adb_flags = 2;
1040 } else {
1041 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1042 pmu_adb_flags = 0;
1043 }
1044 while (!req.complete)
1045 pmu_poll();
1046 return 0;
1047}
1048
1049/* Reset the ADB bus */
aacaf9bd 1050static int
1da177e4
LT		 1051pmu_adb_reset_bus(void)
1052{
1053 struct adb_request req;
1054 int save_autopoll = adb_dev_map;
1055
1056 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1057 return -ENXIO;
1058
1059 /* anyone got a better idea?? */
1060 pmu_adb_autopoll(0);
1061
1062 req.nbytes = 5;
1063 req.done = NULL;
1064 req.data[0] = PMU_ADB_CMD;
1065 req.data[1] = 0;
1066 req.data[2] = ADB_BUSRESET;
1067 req.data[3] = 0;
1068 req.data[4] = 0;
1069 req.reply_len = 0;
1070 req.reply_expected = 1;
1071 if (pmu_queue_request(&req) != 0) {
1072 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1073 return -EIO;
1074 }
1075 pmu_wait_complete(&req);
1076
1077 if (save_autopoll != 0)
1078 pmu_adb_autopoll(save_autopoll);
1079
1080 return 0;
1081}
1082#endif /* CONFIG_ADB */
1083
1084/* Construct and send a pmu request */
aacaf9bd 1085int
1da177e4
LT		 1086pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1087 int nbytes, ...)
1088{
1089 va_list list;
1090 int i;
1091
1092 if (vias == NULL)
1093 return -ENXIO;
1094
1095 if (nbytes < 0 || nbytes > 32) {
1096 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1097 req->complete = 1;
1098 return -EINVAL;
1099 }
1100 req->nbytes = nbytes;
1101 req->done = done;
1102 va_start(list, nbytes);
1103 for (i = 0; i < nbytes; ++i)
1104 req->data[i] = va_arg(list, int);
1105 va_end(list);
1106 req->reply_len = 0;
1107 req->reply_expected = 0;
1108 return pmu_queue_request(req);
1109}
1110
aacaf9bd 1111int
1da177e4
LT		 1112pmu_queue_request(struct adb_request *req)
1113{
1114 unsigned long flags;
1115 int nsend;
1116
1117 if (via == NULL) {
1118 req->complete = 1;
1119 return -ENXIO;
1120 }
1121 if (req->nbytes <= 0) {
1122 req->complete = 1;
1123 return 0;
1124 }
1125 nsend = pmu_data_len[req->data[0]][0];
1126 if (nsend >= 0 && req->nbytes != nsend + 1) {
1127 req->complete = 1;
1128 return -EINVAL;
1129 }
1130
1131 req->next = NULL;
1132 req->sent = 0;
1133 req->complete = 0;
1134
1135 spin_lock_irqsave(&pmu_lock, flags);
1136 if (current_req != 0) {
1137 last_req->next = req;
1138 last_req = req;
1139 } else {
1140 current_req = req;
1141 last_req = req;
1142 if (pmu_state == idle)
1143 pmu_start();
1144 }
1145 spin_unlock_irqrestore(&pmu_lock, flags);
1146
1147 return 0;
1148}
1149
1150static inline void
1151wait_for_ack(void)
1152{
1153 /* Sightly increased the delay, I had one occurrence of the message
1154 * reported
1155 */
1156 int timeout = 4000;
1157 while ((in_8(&via[B]) & TACK) == 0) {
1158 if (--timeout < 0) {
1159 printk(KERN_ERR "PMU not responding (!ack)\n");
1160 return;
1161 }
1162 udelay(10);
1163 }
1164}
1165
1166/* New PMU seems to be very sensitive to those timings, so we make sure
1167 * PCI is flushed immediately */
1168static inline void
1169send_byte(int x)
1170{
1171 volatile unsigned char __iomem *v = via;
1172
1173 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1174 out_8(&v[SR], x);
1175 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
1176 (void)in_8(&v[B]);
1177}
1178
1179static inline void
1180recv_byte(void)
1181{
1182 volatile unsigned char __iomem *v = via;
1183
1184 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1185 in_8(&v[SR]); /* resets SR */
1186 out_8(&v[B], in_8(&v[B]) & ~TREQ);
1187 (void)in_8(&v[B]);
1188}
1189
1190static inline void
1191pmu_done(struct adb_request *req)
1192{
1193 void (*done)(struct adb_request *) = req->done;
1194 mb();
1195 req->complete = 1;
1196 /* Here, we assume that if the request has a done member, the
1197 * struct request will survive to setting req->complete to 1
1198 */
1199 if (done)
1200 (*done)(req);
1201}
1202
aacaf9bd 1203static void
1da177e4
LT		 1204pmu_start(void)
1205{
1206 struct adb_request *req;
1207
1208 /* assert pmu_state == idle */
1209 /* get the packet to send */
1210 req = current_req;
1211 if (req == 0 || pmu_state != idle
1212 || (/*req->reply_expected && */req_awaiting_reply))
1213 return;
1214
1215 pmu_state = sending;
1216 data_index = 1;
1217 data_len = pmu_data_len[req->data[0]][0];
1218
1219 /* Sounds safer to make sure ACK is high before writing. This helped
1220 * kill a problem with ADB and some iBooks
1221 */
1222 wait_for_ack();
1223 /* set the shift register to shift out and send a byte */
1224 send_byte(req->data[0]);
1225}
1226
aacaf9bd 1227void
1da177e4
LT		 1228pmu_poll(void)
1229{
1230 if (!via)
1231 return;
1232 if (disable_poll)
1233 return;
1234 via_pmu_interrupt(0, NULL, NULL);
1235}
1236
aacaf9bd 1237void
1da177e4
LT		 1238pmu_poll_adb(void)
1239{
1240 if (!via)
1241 return;
1242 if (disable_poll)
1243 return;
1244 /* Kicks ADB read when PMU is suspended */
1245 adb_int_pending = 1;
1246 do {
1247 via_pmu_interrupt(0, NULL, NULL);
1248 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1249 || req_awaiting_reply));
1250}
1251
aacaf9bd 1252void
1da177e4
LT		 1253pmu_wait_complete(struct adb_request *req)
1254{
1255 if (!via)
1256 return;
1257 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1258 via_pmu_interrupt(0, NULL, NULL);
1259}
1260
1261/* This function loops until the PMU is idle and prevents it from
1262 * anwsering to ADB interrupts. pmu_request can still be called.
1263 * This is done to avoid spurrious shutdowns when we know we'll have
1264 * interrupts switched off for a long time
1265 */
aacaf9bd 1266void
1da177e4
LT		 1267pmu_suspend(void)
1268{
1269 unsigned long flags;
1270#ifdef SUSPEND_USES_PMU
1271 struct adb_request *req;
1272#endif
1273 if (!via)
1274 return;
1275
1276 spin_lock_irqsave(&pmu_lock, flags);
1277 pmu_suspended++;
1278 if (pmu_suspended > 1) {
1279 spin_unlock_irqrestore(&pmu_lock, flags);
1280 return;
1281 }
1282
1283 do {
1284 spin_unlock_irqrestore(&pmu_lock, flags);
1285 if (req_awaiting_reply)
1286 adb_int_pending = 1;
1287 via_pmu_interrupt(0, NULL, NULL);
1288 spin_lock_irqsave(&pmu_lock, flags);
1289 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1290#ifdef SUSPEND_USES_PMU
1291 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1292 spin_unlock_irqrestore(&pmu_lock, flags);
1293 while(!req.complete)
1294 pmu_poll();
1295#else /* SUSPEND_USES_PMU */
1296 if (gpio_irq >= 0)
1297 disable_irq_nosync(gpio_irq);
1298 out_8(&via[IER], CB1_INT | IER_CLR);
1299 spin_unlock_irqrestore(&pmu_lock, flags);
1300#endif /* SUSPEND_USES_PMU */
1301 break;
1302 }
1303 } while (1);
1304}
1305
aacaf9bd 1306void
1da177e4
LT		 1307pmu_resume(void)
1308{
1309 unsigned long flags;
1310
1311 if (!via || (pmu_suspended < 1))
1312 return;
1313
1314 spin_lock_irqsave(&pmu_lock, flags);
1315 pmu_suspended--;
1316 if (pmu_suspended > 0) {
1317 spin_unlock_irqrestore(&pmu_lock, flags);
1318 return;
1319 }
1320 adb_int_pending = 1;
1321#ifdef SUSPEND_USES_PMU
1322 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1323 spin_unlock_irqrestore(&pmu_lock, flags);
1324 while(!req.complete)
1325 pmu_poll();
1326#else /* SUSPEND_USES_PMU */
1327 if (gpio_irq >= 0)
1328 enable_irq(gpio_irq);
1329 out_8(&via[IER], CB1_INT | IER_SET);
1330 spin_unlock_irqrestore(&pmu_lock, flags);
1331 pmu_poll();
1332#endif /* SUSPEND_USES_PMU */
1333}
1334
1335/* Interrupt data could be the result data from an ADB cmd */
aacaf9bd 1336static void
1da177e4
LT		 1337pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs)
1338{
1339 unsigned char ints, pirq;
1340 int i = 0;
1341
1342 asleep = 0;
1343 if (drop_interrupts || len < 1) {
1344 adb_int_pending = 0;
1345 pmu_irq_stats[8]++;
1346 return;
1347 }
1348
1349 /* Get PMU interrupt mask */
1350 ints = data[0];
1351
1352 /* Record zero interrupts for stats */
1353 if (ints == 0)
1354 pmu_irq_stats[9]++;
1355
1356 /* Hack to deal with ADB autopoll flag */
1357 if (ints & PMU_INT_ADB)
1358 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1359
1360next:
1361
1362 if (ints == 0) {
1363 if (i > pmu_irq_stats[10])
1364 pmu_irq_stats[10] = i;
1365 return;
1366 }
1367
1368 for (pirq = 0; pirq < 8; pirq++)
1369 if (ints & (1 << pirq))
1370 break;
1371 pmu_irq_stats[pirq]++;
1372 i++;
1373 ints &= ~(1 << pirq);
1374
1375 /* Note: for some reason, we get an interrupt with len=1,
1376 * data[0]==0 after each normal ADB interrupt, at least
1377 * on the Pismo. Still investigating... --BenH
1378 */
1379 if ((1 << pirq) & PMU_INT_ADB) {
1380 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1381 struct adb_request *req = req_awaiting_reply;
1382 if (req == 0) {
1383 printk(KERN_ERR "PMU: extra ADB reply\n");
1384 return;
1385 }
1386 req_awaiting_reply = NULL;
1387 if (len <= 2)
1388 req->reply_len = 0;
1389 else {
1390 memcpy(req->reply, data + 1, len - 1);
1391 req->reply_len = len - 1;
1392 }
1393 pmu_done(req);
1394 } else {
1da177e4
LT		 1395 if (len == 4 && data[1] == 0x2c) {
1396 extern int xmon_wants_key, xmon_adb_keycode;
1397 if (xmon_wants_key) {
1398 xmon_adb_keycode = data[2];
1399 return;
1400 }
1401 }
1da177e4
LT		 1402#ifdef CONFIG_ADB
1403 /*
1404 * XXX On the [23]400 the PMU gives us an up
1405 * event for keycodes 0x74 or 0x75 when the PC
1406 * card eject buttons are released, so we
1407 * ignore those events.
1408 */
1409 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1410 && data[1] == 0x2c && data[3] == 0xff
1411 && (data[2] & ~1) == 0xf4))
1412 adb_input(data+1, len-1, regs, 1);
1413#endif /* CONFIG_ADB */
1414 }
1415 }
1416 /* Sound/brightness button pressed */
1417 else if ((1 << pirq) & PMU_INT_SNDBRT) {
1418#ifdef CONFIG_PMAC_BACKLIGHT
1419 if (len == 3)
1420#ifdef CONFIG_INPUT_ADBHID
1421 if (!disable_kernel_backlight)
1422#endif /* CONFIG_INPUT_ADBHID */
1423 set_backlight_level(data[1] >> 4);
1424#endif /* CONFIG_PMAC_BACKLIGHT */
1425 }
1426 /* Tick interrupt */
1427 else if ((1 << pirq) & PMU_INT_TICK) {
1da177e4
LT		 1428 /* Environement or tick interrupt, query batteries */
1429 if (pmu_battery_count) {
1430 if ((--query_batt_timer) == 0) {
1431 query_battery_state();
1432 query_batt_timer = BATTERY_POLLING_COUNT;
1433 }
1434 }
1435 }
1436 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1437 if (pmu_battery_count)
1438 query_battery_state();
1439 pmu_pass_intr(data, len);
1440 } else {
1441 pmu_pass_intr(data, len);
1da177e4
LT		 1442 }
1443 goto next;
1444}
1445
aacaf9bd 1446static struct adb_request*
1da177e4
LT		 1447pmu_sr_intr(struct pt_regs *regs)
1448{
1449 struct adb_request *req;
1450 int bite = 0;
1451
1452 if (via[B] & TREQ) {
1453 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1454 out_8(&via[IFR], SR_INT);
1455 return NULL;
1456 }
1457 /* The ack may not yet be low when we get the interrupt */
1458 while ((in_8(&via[B]) & TACK) != 0)
1459 ;
1460
1461 /* if reading grab the byte, and reset the interrupt */
1462 if (pmu_state == reading || pmu_state == reading_intr)
1463 bite = in_8(&via[SR]);
1464
1465 /* reset TREQ and wait for TACK to go high */
1466 out_8(&via[B], in_8(&via[B]) | TREQ);
1467 wait_for_ack();
1468
1469 switch (pmu_state) {
1470 case sending:
1471 req = current_req;
1472 if (data_len < 0) {
1473 data_len = req->nbytes - 1;
1474 send_byte(data_len);
1475 break;
1476 }
1477 if (data_index <= data_len) {
1478 send_byte(req->data[data_index++]);
1479 break;
1480 }
1481 req->sent = 1;
1482 data_len = pmu_data_len[req->data[0]][1];
1483 if (data_len == 0) {
1484 pmu_state = idle;
1485 current_req = req->next;
1486 if (req->reply_expected)
1487 req_awaiting_reply = req;
1488 else
1489 return req;
1490 } else {
1491 pmu_state = reading;
1492 data_index = 0;
1493 reply_ptr = req->reply + req->reply_len;
1494 recv_byte();
1495 }
1496 break;
1497
1498 case intack:
1499 data_index = 0;
1500 data_len = -1;
1501 pmu_state = reading_intr;
1502 reply_ptr = interrupt_data[int_data_last];
1503 recv_byte();
1504 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1505 enable_irq(gpio_irq);
1506 gpio_irq_enabled = 1;
1507 }
1508 break;
1509
1510 case reading:
1511 case reading_intr:
1512 if (data_len == -1) {
1513 data_len = bite;
1514 if (bite > 32)
1515 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1516 } else if (data_index < 32) {
1517 reply_ptr[data_index++] = bite;
1518 }
1519 if (data_index < data_len) {
1520 recv_byte();
1521 break;
1522 }
1523
1524 if (pmu_state == reading_intr) {
1525 pmu_state = idle;
1526 int_data_state[int_data_last] = int_data_ready;
1527 interrupt_data_len[int_data_last] = data_len;
1528 } else {
1529 req = current_req;
1530 /*
1531 * For PMU sleep and freq change requests, we lock the
1532 * PMU until it's explicitely unlocked. This avoids any
1533 * spurrious event polling getting in
1534 */
1535 current_req = req->next;
1536 req->reply_len += data_index;
1537 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1538 pmu_state = locked;
1539 else
1540 pmu_state = idle;
1541 return req;
1542 }
1543 break;
1544
1545 default:
1546 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1547 pmu_state);
1548 }
1549 return NULL;
1550}
1551
aacaf9bd 1552static irqreturn_t
1da177e4
LT		 1553via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs)
1554{
1555 unsigned long flags;
1556 int intr;
1557 int nloop = 0;
1558 int int_data = -1;
1559 struct adb_request *req = NULL;
1560 int handled = 0;
1561
1562 /* This is a bit brutal, we can probably do better */
1563 spin_lock_irqsave(&pmu_lock, flags);
1564 ++disable_poll;
1565
1566 for (;;) {
1567 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1568 if (intr == 0)
1569 break;
1570 handled = 1;
1571 if (++nloop > 1000) {
1572 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1573 "intr=%x, ier=%x pmu_state=%d\n",
1574 intr, in_8(&via[IER]), pmu_state);
1575 break;
1576 }
1577 out_8(&via[IFR], intr);
1578 if (intr & CB1_INT) {
1579 adb_int_pending = 1;
1580 pmu_irq_stats[0]++;
1581 }
1582 if (intr & SR_INT) {
1583 req = pmu_sr_intr(regs);
1584 if (req)
1585 break;
1586 }
1587 }
1588
1589recheck:
1590 if (pmu_state == idle) {
1591 if (adb_int_pending) {
1592 if (int_data_state[0] == int_data_empty)
1593 int_data_last = 0;
1594 else if (int_data_state[1] == int_data_empty)
1595 int_data_last = 1;
1596 else
1597 goto no_free_slot;
1598 pmu_state = intack;
1599 int_data_state[int_data_last] = int_data_fill;
1600 /* Sounds safer to make sure ACK is high before writing.
1601 * This helped kill a problem with ADB and some iBooks
1602 */
1603 wait_for_ack();
1604 send_byte(PMU_INT_ACK);
1605 adb_int_pending = 0;
1606 } else if (current_req)
1607 pmu_start();
1608 }
1609no_free_slot:
1610 /* Mark the oldest buffer for flushing */
1611 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;
1614 } else if (int_data_state[int_data_last] == int_data_ready) {
1615 int_data_state[int_data_last] = int_data_flush;
1616 int_data = int_data_last;
1617 }
1618 --disable_poll;
1619 spin_unlock_irqrestore(&pmu_lock, flags);
1620
1621 /* Deal with completed PMU requests outside of the lock */
1622 if (req) {
1623 pmu_done(req);
1624 req = NULL;
1625 }
1626
1627 /* Deal with interrupt datas outside of the lock */
1628 if (int_data >= 0) {
1629 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs);
1630 spin_lock_irqsave(&pmu_lock, flags);
1631 ++disable_poll;
1632 int_data_state[int_data] = int_data_empty;
1633 int_data = -1;
1634 goto recheck;
1635 }
1636
1637 return IRQ_RETVAL(handled);
1638}
1639
aacaf9bd 1640void
1da177e4
LT		 1641pmu_unlock(void)
1642{
1643 unsigned long flags;
1644
1645 spin_lock_irqsave(&pmu_lock, flags);
1646 if (pmu_state == locked)
1647 pmu_state = idle;
1648 adb_int_pending = 1;
1649 spin_unlock_irqrestore(&pmu_lock, flags);
1650}
1651
1652
aacaf9bd 1653static irqreturn_t
1da177e4
LT		 1654gpio1_interrupt(int irq, void *arg, struct pt_regs *regs)
1655{
1656 unsigned long flags;
1657
1658 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1659 spin_lock_irqsave(&pmu_lock, flags);
1660 if (gpio_irq_enabled > 0) {
1661 disable_irq_nosync(gpio_irq);
1662 gpio_irq_enabled = 0;
1663 }
1664 pmu_irq_stats[1]++;
1665 adb_int_pending = 1;
1666 spin_unlock_irqrestore(&pmu_lock, flags);
1667 via_pmu_interrupt(0, NULL, NULL);
1668 return IRQ_HANDLED;
1669 }
1670 return IRQ_NONE;
1671}
1672
1673#ifdef CONFIG_PMAC_BACKLIGHT
aacaf9bd 1674static int backlight_to_bright[] = {
1da177e4
LT		 1675 0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e,
1676 0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e
1677};
1678
aacaf9bd 1679static int
1da177e4
LT		 1680pmu_set_backlight_enable(int on, int level, void* data)
1681{
1682 struct adb_request req;
1683
1684 if (vias == NULL)
1685 return -ENODEV;
1686
1687 if (on) {
1688 pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
1689 backlight_to_bright[level]);
1690 pmu_wait_complete(&req);
1691 }
1692 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1693 PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF));
1694 pmu_wait_complete(&req);
1695
1696 return 0;
1697}
1698
aacaf9bd 1699static void
1da177e4
LT		 1700pmu_bright_complete(struct adb_request *req)
1701{
1702 if (req == &bright_req_1)
1703 clear_bit(1, &async_req_locks);
1704 if (req == &bright_req_2)
1705 clear_bit(2, &async_req_locks);
1706}
1707
aacaf9bd 1708static int
1da177e4
LT		 1709pmu_set_backlight_level(int level, void* data)
1710{
1711 if (vias == NULL)
1712 return -ENODEV;
1713
1714 if (test_and_set_bit(1, &async_req_locks))
1715 return -EAGAIN;
1716 pmu_request(&bright_req_1, pmu_bright_complete, 2, PMU_BACKLIGHT_BRIGHT,
1717 backlight_to_bright[level]);
1718 if (test_and_set_bit(2, &async_req_locks))
1719 return -EAGAIN;
1720 pmu_request(&bright_req_2, pmu_bright_complete, 2, PMU_POWER_CTRL,
1721 PMU_POW_BACKLIGHT | (level > BACKLIGHT_OFF ?
1722 PMU_POW_ON : PMU_POW_OFF));
1723
1724 return 0;
1725}
1726#endif /* CONFIG_PMAC_BACKLIGHT */
1727
aacaf9bd 1728void
1da177e4
LT		 1729pmu_enable_irled(int on)
1730{
1731 struct adb_request req;
1732
1733 if (vias == NULL)
1734 return ;
1735 if (pmu_kind == PMU_KEYLARGO_BASED)
1736 return ;
1737
1738 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1739 (on ? PMU_POW_ON : PMU_POW_OFF));
1740 pmu_wait_complete(&req);
1741}
1742
aacaf9bd 1743void
1da177e4
LT		 1744pmu_restart(void)
1745{
1746 struct adb_request req;
1747
1748 if (via == NULL)
1749 return;
1750
1751 local_irq_disable();
1752
1753 drop_interrupts = 1;
1754
1755 if (pmu_kind != PMU_KEYLARGO_BASED) {
1756 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1757 PMU_INT_TICK );
1758 while(!req.complete)
1759 pmu_poll();
1760 }
1761
1762 pmu_request(&req, NULL, 1, PMU_RESET);
1763 pmu_wait_complete(&req);
1764 for (;;)
1765 ;
1766}
1767
aacaf9bd 1768void
1da177e4
LT		 1769pmu_shutdown(void)
1770{
1771 struct adb_request req;
1772
1773 if (via == NULL)
1774 return;
1775
1776 local_irq_disable();
1777
1778 drop_interrupts = 1;
1779
1780 if (pmu_kind != PMU_KEYLARGO_BASED) {
1781 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1782 PMU_INT_TICK );
1783 pmu_wait_complete(&req);
1784 } else {
1785 /* Disable server mode on shutdown or we'll just
1786 * wake up again
1787 */
1788 pmu_set_server_mode(0);
1789 }
1790
1791 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1792 'M', 'A', 'T', 'T');
1793 pmu_wait_complete(&req);
1794 for (;;)
1795 ;
1796}
1797
1798int
1799pmu_present(void)
1800{
1801 return via != 0;
1802}
1803
8c870933 1804#ifdef CONFIG_PM
1da177e4
LT		 1805
1806static LIST_HEAD(sleep_notifiers);
1807
1808int
1809pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
1810{
1811 struct list_head *list;
1812 struct pmu_sleep_notifier *notifier;
1813
1814 for (list = sleep_notifiers.next; list != &sleep_notifiers;
1815 list = list->next) {
1816 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1817 if (n->priority > notifier->priority)
1818 break;
1819 }
1820 __list_add(&n->list, list->prev, list);
1821 return 0;
1822}
3fb62b51 1823EXPORT_SYMBOL(pmu_register_sleep_notifier);
1da177e4
LT		 1824
1825int
1826pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
1827{
1828 if (n->list.next == 0)
1829 return -ENOENT;
1830 list_del(&n->list);
1831 n->list.next = NULL;
1832 return 0;
1833}
3fb62b51 1834EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
a0005034
PM		 1835#endif /* CONFIG_PM */
1836
1837#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1da177e4
LT		 1838
1839/* Sleep is broadcast last-to-first */
aacaf9bd 1840static int
1da177e4
LT		 1841broadcast_sleep(int when, int fallback)
1842{
1843 int ret = PBOOK_SLEEP_OK;
1844 struct list_head *list;
1845 struct pmu_sleep_notifier *notifier;
1846
1847 for (list = sleep_notifiers.prev; list != &sleep_notifiers;
1848 list = list->prev) {
1849 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1850 ret = notifier->notifier_call(notifier, when);
1851 if (ret != PBOOK_SLEEP_OK) {
1852 printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
1853 when, notifier, notifier->notifier_call);
1854 for (; list != &sleep_notifiers; list = list->next) {
1855 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1856 notifier->notifier_call(notifier, fallback);
1857 }
1858 return ret;
1859 }
1860 }
1861 return ret;
1862}
1863
1864/* Wake is broadcast first-to-last */
aacaf9bd 1865static int
1da177e4
LT		 1866broadcast_wake(void)
1867{
1868 int ret = PBOOK_SLEEP_OK;
1869 struct list_head *list;
1870 struct pmu_sleep_notifier *notifier;
1871
1872 for (list = sleep_notifiers.next; list != &sleep_notifiers;
1873 list = list->next) {
1874 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1875 notifier->notifier_call(notifier, PBOOK_WAKE);
1876 }
1877 return ret;
1878}
1879
1880/*
1881 * This struct is used to store config register values for
1882 * PCI devices which may get powered off when we sleep.
1883 */
1884static struct pci_save {
1885#ifndef HACKED_PCI_SAVE
1886 u16 command;
1887 u16 cache_lat;
1888 u16 intr;
1889 u32 rom_address;
1890#else
1891 u32 config[16];
1892#endif
1893} *pbook_pci_saves;
1894static int pbook_npci_saves;
1895
aacaf9bd 1896static void
1da177e4
LT		 1897pbook_alloc_pci_save(void)
1898{
1899 int npci;
1900 struct pci_dev *pd = NULL;
1901
1902 npci = 0;
1903 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1904 ++npci;
1905 }
1906 if (npci == 0)
1907 return;
1908 pbook_pci_saves = (struct pci_save *)
1909 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
1910 pbook_npci_saves = npci;
1911}
1912
aacaf9bd 1913static void
1da177e4
LT		 1914pbook_free_pci_save(void)
1915{
1916 if (pbook_pci_saves == NULL)
1917 return;
1918 kfree(pbook_pci_saves);
1919 pbook_pci_saves = NULL;
1920 pbook_npci_saves = 0;
1921}
1922
aacaf9bd 1923static void
1da177e4
LT		 1924pbook_pci_save(void)
1925{
1926 struct pci_save *ps = pbook_pci_saves;
1927 struct pci_dev *pd = NULL;
1928 int npci = pbook_npci_saves;
1929
1930 if (ps == NULL)
1931 return;
1932
1933 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1934 if (npci-- == 0)
1935 return;
1936#ifndef HACKED_PCI_SAVE
1937 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
1938 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
1939 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
1940 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
1941#else
1942 int i;
1943 for (i=1;i<16;i++)
1944 pci_read_config_dword(pd, i<<4, &ps->config[i]);
1945#endif
1946 ++ps;
1947 }
1948}
1949
1950/* For this to work, we must take care of a few things: If gmac was enabled
1951 * during boot, it will be in the pci dev list. If it's disabled at this point
1952 * (and it will probably be), then you can't access it's config space.
1953 */
aacaf9bd 1954static void
1da177e4
LT		 1955pbook_pci_restore(void)
1956{
1957 u16 cmd;
1958 struct pci_save *ps = pbook_pci_saves - 1;
1959 struct pci_dev *pd = NULL;
1960 int npci = pbook_npci_saves;
1961 int j;
1962
1963 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1964#ifdef HACKED_PCI_SAVE
1965 int i;
1966 if (npci-- == 0)
1967 return;
1968 ps++;
1969 for (i=2;i<16;i++)
1970 pci_write_config_dword(pd, i<<4, ps->config[i]);
1971 pci_write_config_dword(pd, 4, ps->config[1]);
1972#else
1973 if (npci-- == 0)
1974 return;
1975 ps++;
1976 if (ps->command == 0)
1977 continue;
1978 pci_read_config_word(pd, PCI_COMMAND, &cmd);
1979 if ((ps->command & ~cmd) == 0)
1980 continue;
1981 switch (pd->hdr_type) {
1982 case PCI_HEADER_TYPE_NORMAL:
1983 for (j = 0; j < 6; ++j)
1984 pci_write_config_dword(pd,
1985 PCI_BASE_ADDRESS_0 + j*4,
1986 pd->resource[j].start);
1987 pci_write_config_dword(pd, PCI_ROM_ADDRESS,
1988 ps->rom_address);
1989 pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
1990 ps->cache_lat);
1991 pci_write_config_word(pd, PCI_INTERRUPT_LINE,
1992 ps->intr);
1993 pci_write_config_word(pd, PCI_COMMAND, ps->command);
1994 break;
1995 }
1996#endif
1997 }
1998}
1999
2000#ifdef DEBUG_SLEEP
2001/* N.B. This doesn't work on the 3400 */
aacaf9bd 2002void
1da177e4
LT		 2003pmu_blink(int n)
2004{
2005 struct adb_request req;
2006
2007 memset(&req, 0, sizeof(req));
2008
2009 for (; n > 0; --n) {
2010 req.nbytes = 4;
2011 req.done = NULL;
2012 req.data[0] = 0xee;
2013 req.data[1] = 4;
2014 req.data[2] = 0;
2015 req.data[3] = 1;
2016 req.reply[0] = ADB_RET_OK;
2017 req.reply_len = 1;
2018 req.reply_expected = 0;
2019 pmu_polled_request(&req);
2020 mdelay(50);
2021 req.nbytes = 4;
2022 req.done = NULL;
2023 req.data[0] = 0xee;
2024 req.data[1] = 4;
2025 req.data[2] = 0;
2026 req.data[3] = 0;
2027 req.reply[0] = ADB_RET_OK;
2028 req.reply_len = 1;
2029 req.reply_expected = 0;
2030 pmu_polled_request(&req);
2031 mdelay(50);
2032 }
2033 mdelay(50);
2034}
2035#endif
2036
2037/*
2038 * Put the powerbook to sleep.
2039 */
2040
aacaf9bd 2041static u32 save_via[8];
1da177e4 2042
aacaf9bd 2043static void
1da177e4
LT		 2044save_via_state(void)
2045{
2046 save_via[0] = in_8(&via[ANH]);
2047 save_via[1] = in_8(&via[DIRA]);
2048 save_via[2] = in_8(&via[B]);
2049 save_via[3] = in_8(&via[DIRB]);
2050 save_via[4] = in_8(&via[PCR]);
2051 save_via[5] = in_8(&via[ACR]);
2052 save_via[6] = in_8(&via[T1CL]);
2053 save_via[7] = in_8(&via[T1CH]);
2054}
aacaf9bd 2055static void
1da177e4
LT		 2056restore_via_state(void)
2057{
2058 out_8(&via[ANH], save_via[0]);
2059 out_8(&via[DIRA], save_via[1]);
2060 out_8(&via[B], save_via[2]);
2061 out_8(&via[DIRB], save_via[3]);
2062 out_8(&via[PCR], save_via[4]);
2063 out_8(&via[ACR], save_via[5]);
2064 out_8(&via[T1CL], save_via[6]);
2065 out_8(&via[T1CH], save_via[7]);
2066 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
2067 out_8(&via[IFR], 0x7f); /* clear IFR */
2068 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
2069}
2070
aacaf9bd 2071static int
1da177e4
LT		 2072pmac_suspend_devices(void)
2073{
2074 int ret;
2075
2076 pm_prepare_console();
2077
2078 /* Notify old-style device drivers & userland */
2079 ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
2080 if (ret != PBOOK_SLEEP_OK) {
2081 printk(KERN_ERR "Sleep rejected by drivers\n");
2082 return -EBUSY;
2083 }
2084
2085 /* Sync the disks. */
2086 /* XXX It would be nice to have some way to ensure that
2087 * nobody is dirtying any new buffers while we wait. That
2088 * could be achieved using the refrigerator for processes
2089 * that swsusp uses
2090 */
2091 sys_sync();
2092
2093 /* Sleep can fail now. May not be very robust but useful for debugging */
2094 ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
2095 if (ret != PBOOK_SLEEP_OK) {
2096 printk(KERN_ERR "Driver sleep failed\n");
2097 return -EBUSY;
2098 }
2099
2100 /* Send suspend call to devices, hold the device core's dpm_sem */
2101 ret = device_suspend(PMSG_SUSPEND);
2102 if (ret) {
2103 broadcast_wake();
2104 printk(KERN_ERR "Driver sleep failed\n");
2105 return -EBUSY;
2106 }
2107
e521dca6 2108 /* Stop preemption */
1da177e4
LT		 2109 preempt_disable();
2110
2111 /* Make sure the decrementer won't interrupt us */
2112 asm volatile("mtdec %0" : : "r" (0x7fffffff));
2113 /* Make sure any pending DEC interrupt occurring while we did
2114 * the above didn't re-enable the DEC */
2115 mb();
2116 asm volatile("mtdec %0" : : "r" (0x7fffffff));
2117
2118 /* We can now disable MSR_EE. This code of course works properly only
2119 * on UP machines... For SMP, if we ever implement sleep, we'll have to
2120 * stop the "other" CPUs way before we do all that stuff.
2121 */
2122 local_irq_disable();
2123
2124 /* Broadcast power down irq
2125 * This isn't that useful in most cases (only directly wired devices can
2126 * use this but still... This will take care of sysdev's as well, so
2127 * we exit from here with local irqs disabled and PIC off.
2128 */
bf2049f9 2129 ret = device_power_down(PMSG_SUSPEND);
1da177e4
LT		 2130 if (ret) {
2131 wakeup_decrementer();
2132 local_irq_enable();
2133 preempt_enable();
2134 device_resume();
2135 broadcast_wake();
2136 printk(KERN_ERR "Driver powerdown failed\n");
2137 return -EBUSY;
2138 }
2139
2140 /* Wait for completion of async backlight requests */
2141 while (!bright_req_1.complete || !bright_req_2.complete ||
2142 !batt_req.complete)
2143 pmu_poll();
2144
2145 /* Giveup the lazy FPU & vec so we don't have to back them
2146 * up from the low level code
2147 */
2148 enable_kernel_fp();
2149
2150#ifdef CONFIG_ALTIVEC
2151 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2152 enable_kernel_altivec();
2153#endif /* CONFIG_ALTIVEC */
2154
2155 return 0;
2156}
2157
aacaf9bd 2158static int
1da177e4
LT		 2159pmac_wakeup_devices(void)
2160{
2161 mdelay(100);
2162
2163 /* Power back up system devices (including the PIC) */
2164 device_power_up();
2165
2166 /* Force a poll of ADB interrupts */
2167 adb_int_pending = 1;
2168 via_pmu_interrupt(0, NULL, NULL);
2169
2170 /* Restart jiffies & scheduling */
2171 wakeup_decrementer();
2172
2173 /* Re-enable local CPU interrupts */
2174 local_irq_enable();
b16eeb47 2175 mdelay(10);
1da177e4
LT		 2176 preempt_enable();
2177
2178 /* Resume devices */
2179 device_resume();
2180
2181 /* Notify old style drivers */
2182 broadcast_wake();
2183
2184 pm_restore_console();
2185
2186 return 0;
2187}
2188
2189#define GRACKLE_PM (1<<7)
2190#define GRACKLE_DOZE (1<<5)
2191#define GRACKLE_NAP (1<<4)
2192#define GRACKLE_SLEEP (1<<3)
2193
aacaf9bd 2194int
1da177e4
LT		 2195powerbook_sleep_grackle(void)
2196{
2197 unsigned long save_l2cr;
2198 unsigned short pmcr1;
2199 struct adb_request req;
2200 int ret;
2201 struct pci_dev *grackle;
2202
2203 grackle = pci_find_slot(0, 0);
2204 if (!grackle)
2205 return -ENODEV;
2206
2207 ret = pmac_suspend_devices();
2208 if (ret) {
2209 printk(KERN_ERR "Sleep rejected by devices\n");
2210 return ret;
2211 }
2212
2213 /* Turn off various things. Darwin does some retry tests here... */
2214 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2215 pmu_wait_complete(&req);
2216 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2217 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2218 pmu_wait_complete(&req);
2219
2220 /* For 750, save backside cache setting and disable it */
2221 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
2222
2223 if (!__fake_sleep) {
2224 /* Ask the PMU to put us to sleep */
2225 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2226 pmu_wait_complete(&req);
2227 }
2228
2229 /* The VIA is supposed not to be restored correctly*/
2230 save_via_state();
2231 /* We shut down some HW */
2232 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2233
2234 pci_read_config_word(grackle, 0x70, &pmcr1);
2235 /* Apparently, MacOS uses NAP mode for Grackle ??? */
2236 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2237 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2238 pci_write_config_word(grackle, 0x70, pmcr1);
2239
2240 /* Call low-level ASM sleep handler */
2241 if (__fake_sleep)
2242 mdelay(5000);
2243 else
2244 low_sleep_handler();
2245
2246 /* We're awake again, stop grackle PM */
2247 pci_read_config_word(grackle, 0x70, &pmcr1);
2248 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2249 pci_write_config_word(grackle, 0x70, pmcr1);
2250
2251 /* Make sure the PMU is idle */
2252 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2253 restore_via_state();
2254
2255 /* Restore L2 cache */
2256 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2257 _set_L2CR(save_l2cr);
2258
2259 /* Restore userland MMU context */
2260 set_context(current->active_mm->context, current->active_mm->pgd);
2261
2262 /* Power things up */
2263 pmu_unlock();
2264 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2265 pmu_wait_complete(&req);
2266 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2267 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2268 pmu_wait_complete(&req);
2269 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2270 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2271 pmu_wait_complete(&req);
2272
2273 pmac_wakeup_devices();
2274
2275 return 0;
2276}
2277
aacaf9bd 2278static int
1da177e4
LT		 2279powerbook_sleep_Core99(void)
2280{
2281 unsigned long save_l2cr;
2282 unsigned long save_l3cr;
2283 struct adb_request req;
2284 int ret;
2285
2286 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2287 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2288 return -ENOSYS;
2289 }
2290
2291 if (num_online_cpus() > 1 || cpu_is_offline(0))
2292 return -EAGAIN;
2293
2294 ret = pmac_suspend_devices();
2295 if (ret) {
2296 printk(KERN_ERR "Sleep rejected by devices\n");
2297 return ret;
2298 }
2299
b16eeb47
BH		 2300 /* Stop environment and ADB interrupts */
2301 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2302 pmu_wait_complete(&req);
1da177e4
LT		 2303
2304 /* Tell PMU what events will wake us up */
2305 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2306 0xff, 0xff);
2307 pmu_wait_complete(&req);
2308 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2309 0, PMU_PWR_WAKEUP_KEY |
2310 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2311 pmu_wait_complete(&req);
2312
2313 /* Save the state of the L2 and L3 caches */
2314 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
2315 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
2316
2317 if (!__fake_sleep) {
2318 /* Ask the PMU to put us to sleep */
2319 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2320 pmu_wait_complete(&req);
2321 }
2322
2323 /* The VIA is supposed not to be restored correctly*/
2324 save_via_state();
2325
2326 /* Shut down various ASICs. There's a chance that we can no longer
2327 * talk to the PMU after this, so I moved it to _after_ sending the
2328 * sleep command to it. Still need to be checked.
2329 */
2330 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2331
2332 /* Call low-level ASM sleep handler */
2333 if (__fake_sleep)
2334 mdelay(5000);
2335 else
2336 low_sleep_handler();
2337
2338 /* Restore Apple core ASICs state */
2339 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2340
2341 /* Restore VIA */
2342 restore_via_state();
2343
0086b5ec
BH		 2344 /* tweak LPJ before cpufreq is there */
2345 loops_per_jiffy *= 2;
2346
1da177e4
LT		 2347 /* Restore video */
2348 pmac_call_early_video_resume();
2349
2350 /* Restore L2 cache */
2351 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2352 _set_L2CR(save_l2cr);
2353 /* Restore L3 cache */
2354 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2355 _set_L3CR(save_l3cr);
2356
2357 /* Restore userland MMU context */
2358 set_context(current->active_mm->context, current->active_mm->pgd);
2359
2360 /* Tell PMU we are ready */
2361 pmu_unlock();
2362 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2363 pmu_wait_complete(&req);
2364 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2365 pmu_wait_complete(&req);
2366
0086b5ec
BH		 2367 /* Restore LPJ, cpufreq will adjust the cpu frequency */
2368 loops_per_jiffy /= 2;
2369
1da177e4
LT		 2370 pmac_wakeup_devices();
2371
2372 return 0;
2373}
2374
2375#define PB3400_MEM_CTRL 0xf8000000
2376#define PB3400_MEM_CTRL_SLEEP 0x70
2377
aacaf9bd 2378static int
1da177e4
LT		 2379powerbook_sleep_3400(void)
2380{
2381 int ret, i, x;
2382 unsigned int hid0;
2383 unsigned long p;
2384 struct adb_request sleep_req;
2385 void __iomem *mem_ctrl;
2386 unsigned int __iomem *mem_ctrl_sleep;
2387
2388 /* first map in the memory controller registers */
2389 mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2390 if (mem_ctrl == NULL) {
2391 printk("powerbook_sleep_3400: ioremap failed\n");
2392 return -ENOMEM;
2393 }
2394 mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2395
2396 /* Allocate room for PCI save */
2397 pbook_alloc_pci_save();
2398
2399 ret = pmac_suspend_devices();
2400 if (ret) {
2401 pbook_free_pci_save();
2402 printk(KERN_ERR "Sleep rejected by devices\n");
2403 return ret;
2404 }
2405
2406 /* Save the state of PCI config space for some slots */
2407 pbook_pci_save();
2408
2409 /* Set the memory controller to keep the memory refreshed
2410 while we're asleep */
2411 for (i = 0x403f; i >= 0x4000; --i) {
2412 out_be32(mem_ctrl_sleep, i);
2413 do {
2414 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2415 } while (x == 0);
2416 if (x >= 0x100)
2417 break;
2418 }
2419
2420 /* Ask the PMU to put us to sleep */
2421 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2422 while (!sleep_req.complete)
2423 mb();
2424
2425 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2426
2427 /* displacement-flush the L2 cache - necessary? */
2428 for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2429 i = *(volatile int *)p;
2430 asleep = 1;
2431
2432 /* Put the CPU into sleep mode */
21fe3301 2433 hid0 = mfspr(SPRN_HID0);
1da177e4 2434 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
21fe3301
BH		 2435 mtspr(SPRN_HID0, hid0);
2436 mtmsr(mfmsr() | MSR_POW | MSR_EE);
1da177e4
LT		 2437 udelay(10);
2438
2439 /* OK, we're awake again, start restoring things */
2440 out_be32(mem_ctrl_sleep, 0x3f);
2441 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2442 pbook_pci_restore();
2443 pmu_unlock();
2444
2445 /* wait for the PMU interrupt sequence to complete */
2446 while (asleep)
2447 mb();
2448
2449 pmac_wakeup_devices();
2450 pbook_free_pci_save();
2451 iounmap(mem_ctrl);
2452
2453 return 0;
2454}
2455
a0005034 2456#endif /* CONFIG_PM && CONFIG_PPC32 */
8c870933 2457
1da177e4
LT		 2458/*
2459 * Support for /dev/pmu device
2460 */
2461#define RB_SIZE 0x10
2462struct pmu_private {
2463 struct list_head list;
2464 int rb_get;
2465 int rb_put;
2466 struct rb_entry {
2467 unsigned short len;
2468 unsigned char data[16];
2469 } rb_buf[RB_SIZE];
2470 wait_queue_head_t wait;
2471 spinlock_t lock;
2472#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2473 int backlight_locker;
2474#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2475};
2476
2477static LIST_HEAD(all_pmu_pvt);
aacaf9bd 2478static DEFINE_SPINLOCK(all_pvt_lock);
1da177e4 2479
aacaf9bd 2480static void
1da177e4
LT		 2481pmu_pass_intr(unsigned char *data, int len)
2482{
2483 struct pmu_private *pp;
2484 struct list_head *list;
2485 int i;
2486 unsigned long flags;
2487
2488 if (len > sizeof(pp->rb_buf[0].data))
2489 len = sizeof(pp->rb_buf[0].data);
2490 spin_lock_irqsave(&all_pvt_lock, flags);
2491 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2492 pp = list_entry(list, struct pmu_private, list);
2493 spin_lock(&pp->lock);
2494 i = pp->rb_put + 1;
2495 if (i >= RB_SIZE)
2496 i = 0;
2497 if (i != pp->rb_get) {
2498 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2499 rp->len = len;
2500 memcpy(rp->data, data, len);
2501 pp->rb_put = i;
2502 wake_up_interruptible(&pp->wait);
2503 }
2504 spin_unlock(&pp->lock);
2505 }
2506 spin_unlock_irqrestore(&all_pvt_lock, flags);
2507}
2508
aacaf9bd 2509static int
1da177e4
LT		 2510pmu_open(struct inode *inode, struct file *file)
2511{
2512 struct pmu_private *pp;
2513 unsigned long flags;
2514
2515 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2516 if (pp == 0)
2517 return -ENOMEM;
2518 pp->rb_get = pp->rb_put = 0;
2519 spin_lock_init(&pp->lock);
2520 init_waitqueue_head(&pp->wait);
2521 spin_lock_irqsave(&all_pvt_lock, flags);
2522#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2523 pp->backlight_locker = 0;
2524#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2525 list_add(&pp->list, &all_pmu_pvt);
2526 spin_unlock_irqrestore(&all_pvt_lock, flags);
2527 file->private_data = pp;
2528 return 0;
2529}
2530
aacaf9bd 2531static ssize_t
1da177e4
LT		 2532pmu_read(struct file *file, char __user *buf,
2533 size_t count, loff_t *ppos)
2534{
2535 struct pmu_private *pp = file->private_data;
2536 DECLARE_WAITQUEUE(wait, current);
2537 unsigned long flags;
2538 int ret = 0;
2539
2540 if (count < 1 || pp == 0)
2541 return -EINVAL;
2542 if (!access_ok(VERIFY_WRITE, buf, count))
2543 return -EFAULT;
2544
2545 spin_lock_irqsave(&pp->lock, flags);
2546 add_wait_queue(&pp->wait, &wait);
2547 current->state = TASK_INTERRUPTIBLE;
2548
2549 for (;;) {
2550 ret = -EAGAIN;
2551 if (pp->rb_get != pp->rb_put) {
2552 int i = pp->rb_get;
2553 struct rb_entry *rp = &pp->rb_buf[i];
2554 ret = rp->len;
2555 spin_unlock_irqrestore(&pp->lock, flags);
2556 if (ret > count)
2557 ret = count;
2558 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2559 ret = -EFAULT;
2560 if (++i >= RB_SIZE)
2561 i = 0;
2562 spin_lock_irqsave(&pp->lock, flags);
2563 pp->rb_get = i;
2564 }
2565 if (ret >= 0)
2566 break;
2567 if (file->f_flags & O_NONBLOCK)
2568 break;
2569 ret = -ERESTARTSYS;
2570 if (signal_pending(current))
2571 break;
2572 spin_unlock_irqrestore(&pp->lock, flags);
2573 schedule();
2574 spin_lock_irqsave(&pp->lock, flags);
2575 }
2576 current->state = TASK_RUNNING;
2577 remove_wait_queue(&pp->wait, &wait);
2578 spin_unlock_irqrestore(&pp->lock, flags);
2579
2580 return ret;
2581}
2582
aacaf9bd 2583static ssize_t
1da177e4
LT		 2584pmu_write(struct file *file, const char __user *buf,
2585 size_t count, loff_t *ppos)
2586{
2587 return 0;
2588}
2589
aacaf9bd 2590static unsigned int
1da177e4
LT		 2591pmu_fpoll(struct file *filp, poll_table *wait)
2592{
2593 struct pmu_private *pp = filp->private_data;
2594 unsigned int mask = 0;
2595 unsigned long flags;
2596
2597 if (pp == 0)
2598 return 0;
2599 poll_wait(filp, &pp->wait, wait);
2600 spin_lock_irqsave(&pp->lock, flags);
2601 if (pp->rb_get != pp->rb_put)
2602 mask |= POLLIN;
2603 spin_unlock_irqrestore(&pp->lock, flags);
2604 return mask;
2605}
2606
aacaf9bd 2607static int
1da177e4
LT		 2608pmu_release(struct inode *inode, struct file *file)
2609{
2610 struct pmu_private *pp = file->private_data;
2611 unsigned long flags;
2612
2613 lock_kernel();
2614 if (pp != 0) {
2615 file->private_data = NULL;
2616 spin_lock_irqsave(&all_pvt_lock, flags);
2617 list_del(&pp->list);
2618 spin_unlock_irqrestore(&all_pvt_lock, flags);
2619#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2620 if (pp->backlight_locker) {
2621 spin_lock_irqsave(&pmu_lock, flags);
2622 disable_kernel_backlight--;
2623 spin_unlock_irqrestore(&pmu_lock, flags);
2624 }
2625#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2626 kfree(pp);
2627 }
2628 unlock_kernel();
2629 return 0;
2630}
2631
aacaf9bd 2632static int
1da177e4
LT		 2633pmu_ioctl(struct inode * inode, struct file *filp,
2634 u_int cmd, u_long arg)
2635{
1da177e4 2636 __u32 __user *argp = (__u32 __user *)arg;
8c870933 2637 int error = -EINVAL;
1da177e4
LT		 2638
2639 switch (cmd) {
a0005034 2640#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1da177e4
LT		 2641 case PMU_IOC_SLEEP:
2642 if (!capable(CAP_SYS_ADMIN))
2643 return -EACCES;
2644 if (sleep_in_progress)
2645 return -EBUSY;
2646 sleep_in_progress = 1;
2647 switch (pmu_kind) {
2648 case PMU_OHARE_BASED:
2649 error = powerbook_sleep_3400();
2650 break;
2651 case PMU_HEATHROW_BASED:
2652 case PMU_PADDINGTON_BASED:
2653 error = powerbook_sleep_grackle();
2654 break;
2655 case PMU_KEYLARGO_BASED:
2656 error = powerbook_sleep_Core99();
2657 break;
2658 default:
2659 error = -ENOSYS;
2660 }
2661 sleep_in_progress = 0;
8c870933 2662 break;
1da177e4
LT		 2663 case PMU_IOC_CAN_SLEEP:
2664 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2665 return put_user(0, argp);
2666 else
2667 return put_user(1, argp);
a0005034 2668#endif /* CONFIG_PM && CONFIG_PPC32 */
1da177e4
LT		 2669
2670#ifdef CONFIG_PMAC_BACKLIGHT
2671 /* Backlight should have its own device or go via
2672 * the fbdev
2673 */
2674 case PMU_IOC_GET_BACKLIGHT:
2675 if (sleep_in_progress)
2676 return -EBUSY;
2677 error = get_backlight_level();
2678 if (error < 0)
2679 return error;
2680 return put_user(error, argp);
2681 case PMU_IOC_SET_BACKLIGHT:
2682 {
2683 __u32 value;
2684 if (sleep_in_progress)
2685 return -EBUSY;
2686 error = get_user(value, argp);
2687 if (!error)
2688 error = set_backlight_level(value);
8c870933 2689 break;
1da177e4
LT		 2690 }
2691#ifdef CONFIG_INPUT_ADBHID
2692 case PMU_IOC_GRAB_BACKLIGHT: {
8c870933 2693 struct pmu_private *pp = filp->private_data;
1da177e4 2694 unsigned long flags;
8c870933 2695
1da177e4
LT		 2696 if (pp->backlight_locker)
2697 return 0;
2698 pp->backlight_locker = 1;
2699 spin_lock_irqsave(&pmu_lock, flags);
2700 disable_kernel_backlight++;
2701 spin_unlock_irqrestore(&pmu_lock, flags);
2702 return 0;
2703 }
2704#endif /* CONFIG_INPUT_ADBHID */
2705#endif /* CONFIG_PMAC_BACKLIGHT */
2706 case PMU_IOC_GET_MODEL:
2707 return put_user(pmu_kind, argp);
2708 case PMU_IOC_HAS_ADB:
2709 return put_user(pmu_has_adb, argp);
2710 }
8c870933 2711 return error;
1da177e4
LT		 2712}
2713
aacaf9bd 2714static struct file_operations pmu_device_fops = {
1da177e4
LT		 2715 .read = pmu_read,
2716 .write = pmu_write,
2717 .poll = pmu_fpoll,
2718 .ioctl = pmu_ioctl,
2719 .open = pmu_open,
2720 .release = pmu_release,
2721};
2722
aacaf9bd 2723static struct miscdevice pmu_device = {
1da177e4
LT		 2724 PMU_MINOR, "pmu", &pmu_device_fops
2725};
2726
8c870933 2727static int pmu_device_init(void)
1da177e4
LT		 2728{
2729 if (!via)
8c870933 2730 return 0;
1da177e4
LT		 2731 if (misc_register(&pmu_device) < 0)
2732 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
8c870933 2733 return 0;
1da177e4 2734}
8c870933
BH		 2735device_initcall(pmu_device_init);
2736
1da177e4
LT		 2737
2738#ifdef DEBUG_SLEEP
aacaf9bd 2739static inline void
1da177e4
LT		 2740polled_handshake(volatile unsigned char __iomem *via)
2741{
2742 via[B] &= ~TREQ; eieio();
2743 while ((via[B] & TACK) != 0)
2744 ;
2745 via[B] |= TREQ; eieio();
2746 while ((via[B] & TACK) == 0)
2747 ;
2748}
2749
aacaf9bd 2750static inline void
1da177e4
LT		 2751polled_send_byte(volatile unsigned char __iomem *via, int x)
2752{
2753 via[ACR] |= SR_OUT | SR_EXT; eieio();
2754 via[SR] = x; eieio();
2755 polled_handshake(via);
2756}
2757
aacaf9bd 2758static inline int
1da177e4
LT		 2759polled_recv_byte(volatile unsigned char __iomem *via)
2760{
2761 int x;
2762
2763 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2764 x = via[SR]; eieio();
2765 polled_handshake(via);
2766 x = via[SR]; eieio();
2767 return x;
2768}
2769
aacaf9bd 2770int
1da177e4
LT		 2771pmu_polled_request(struct adb_request *req)
2772{
2773 unsigned long flags;
2774 int i, l, c;
2775 volatile unsigned char __iomem *v = via;
2776
2777 req->complete = 1;
2778 c = req->data[0];
2779 l = pmu_data_len[c][0];
2780 if (l >= 0 && req->nbytes != l + 1)
2781 return -EINVAL;
2782
2783 local_irq_save(flags);
2784 while (pmu_state != idle)
2785 pmu_poll();
2786
2787 while ((via[B] & TACK) == 0)
2788 ;
2789 polled_send_byte(v, c);
2790 if (l < 0) {
2791 l = req->nbytes - 1;
2792 polled_send_byte(v, l);
2793 }
2794 for (i = 1; i <= l; ++i)
2795 polled_send_byte(v, req->data[i]);
2796
2797 l = pmu_data_len[c][1];
2798 if (l < 0)
2799 l = polled_recv_byte(v);
2800 for (i = 0; i < l; ++i)
2801 req->reply[i + req->reply_len] = polled_recv_byte(v);
2802
2803 if (req->done)
2804 (*req->done)(req);
2805
2806 local_irq_restore(flags);
2807 return 0;
2808}
2809#endif /* DEBUG_SLEEP */
2810
2811
2812/* FIXME: This is a temporary set of callbacks to enable us
2813 * to do suspend-to-disk.
2814 */
2815
a0005034 2816#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1da177e4
LT		 2817
2818static int pmu_sys_suspended = 0;
2819
3bfffd97 2820static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
1da177e4 2821{
ca078bae 2822 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
1da177e4
LT		 2823 return 0;
2824
2825 /* Suspend PMU event interrupts */
2826 pmu_suspend();
2827
2828 pmu_sys_suspended = 1;
2829 return 0;
2830}
2831
2832static int pmu_sys_resume(struct sys_device *sysdev)
2833{
2834 struct adb_request req;
2835
2836 if (!pmu_sys_suspended)
2837 return 0;
2838
2839 /* Tell PMU we are ready */
2840 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2841 pmu_wait_complete(&req);
2842
2843 /* Resume PMU event interrupts */
2844 pmu_resume();
2845
2846 pmu_sys_suspended = 0;
2847
2848 return 0;
2849}
2850
a0005034 2851#endif /* CONFIG_PM && CONFIG_PPC32 */
1da177e4
LT		 2852
2853static struct sysdev_class pmu_sysclass = {
2854 set_kset_name("pmu"),
2855};
2856
2857static struct sys_device device_pmu = {
2858 .id = 0,
2859 .cls = &pmu_sysclass,
2860};
2861
2862static struct sysdev_driver driver_pmu = {
a0005034 2863#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1da177e4
LT		 2864 .suspend = &pmu_sys_suspend,
2865 .resume = &pmu_sys_resume,
a0005034 2866#endif /* CONFIG_PM && CONFIG_PPC32 */
1da177e4
LT		 2867};
2868
2869static int __init init_pmu_sysfs(void)
2870{
2871 int rc;
2872
2873 rc = sysdev_class_register(&pmu_sysclass);
2874 if (rc) {
2875 printk(KERN_ERR "Failed registering PMU sys class\n");
2876 return -ENODEV;
2877 }
2878 rc = sysdev_register(&device_pmu);
2879 if (rc) {
2880 printk(KERN_ERR "Failed registering PMU sys device\n");
2881 return -ENODEV;
2882 }
2883 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2884 if (rc) {
2885 printk(KERN_ERR "Failed registering PMU sys driver\n");
2886 return -ENODEV;
2887 }
2888 return 0;
2889}
2890
2891subsys_initcall(init_pmu_sysfs);
2892
2893EXPORT_SYMBOL(pmu_request);
730745a5 2894EXPORT_SYMBOL(pmu_queue_request);
1da177e4
LT		 2895EXPORT_SYMBOL(pmu_poll);
2896EXPORT_SYMBOL(pmu_poll_adb);
2897EXPORT_SYMBOL(pmu_wait_complete);
2898EXPORT_SYMBOL(pmu_suspend);
2899EXPORT_SYMBOL(pmu_resume);
2900EXPORT_SYMBOL(pmu_unlock);
a0005034 2901#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1da177e4
LT		 2902EXPORT_SYMBOL(pmu_enable_irled);
2903EXPORT_SYMBOL(pmu_battery_count);
2904EXPORT_SYMBOL(pmu_batteries);
2905EXPORT_SYMBOL(pmu_power_flags);
a0005034 2906#endif /* CONFIG_PM && CONFIG_PPC32 */
1da177e4 2907
Linux kernel - Deliverables
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