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[PATCH] PM: Change code ordering in main.c
[linux-2.6.git] / drivers / macintosh / via-pmu.c
blob8ca75e52f637021ea33f49d3c6a4175506313ecc
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 * - Save/Restore PCI space properly
20 *
21 */
22 #include <stdarg.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.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/smp_lock.h>
37 #include <linux/module.h>
38 #include <linux/spinlock.h>
39 #include <linux/pm.h>
40 #include <linux/proc_fs.h>
41 #include <linux/init.h>
42 #include <linux/interrupt.h>
43 #include <linux/device.h>
44 #include <linux/sysdev.h>
45 #include <linux/freezer.h>
46 #include <linux/syscalls.h>
47 #include <linux/suspend.h>
48 #include <linux/cpu.h>
49 #include <asm/prom.h>
50 #include <asm/machdep.h>
51 #include <asm/io.h>
52 #include <asm/pgtable.h>
53 #include <asm/system.h>
54 #include <asm/sections.h>
55 #include <asm/irq.h>
56 #include <asm/pmac_feature.h>
57 #include <asm/pmac_pfunc.h>
58 #include <asm/pmac_low_i2c.h>
59 #include <asm/uaccess.h>
60 #include <asm/mmu_context.h>
61 #include <asm/cputable.h>
62 #include <asm/time.h>
63 #include <asm/backlight.h>
64
65 #include "via-pmu-event.h"
66
67 /* Some compile options */
68 #undef SUSPEND_USES_PMU
69 #define DEBUG_SLEEP
70 #undef HACKED_PCI_SAVE
71
72 /* Misc minor number allocated for /dev/pmu */
73 #define PMU_MINOR 154
74
75 /* How many iterations between battery polls */
76 #define BATTERY_POLLING_COUNT 2
77
78 static volatile unsigned char __iomem *via;
79
80 /* VIA registers - spaced 0x200 bytes apart */
81 #define RS 0x200 /* skip between registers */
82 #define B 0 /* B-side data */
83 #define A RS /* A-side data */
84 #define DIRB (2*RS) /* B-side direction (1=output) */
85 #define DIRA (3*RS) /* A-side direction (1=output) */
86 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
87 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
88 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
89 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
90 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
91 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
92 #define SR (10*RS) /* Shift register */
93 #define ACR (11*RS) /* Auxiliary control register */
94 #define PCR (12*RS) /* Peripheral control register */
95 #define IFR (13*RS) /* Interrupt flag register */
96 #define IER (14*RS) /* Interrupt enable register */
97 #define ANH (15*RS) /* A-side data, no handshake */
98
99 /* Bits in B data register: both active low */
100 #define TACK 0x08 /* Transfer acknowledge (input) */
101 #define TREQ 0x10 /* Transfer request (output) */
102
103 /* Bits in ACR */
104 #define SR_CTRL 0x1c /* Shift register control bits */
105 #define SR_EXT 0x0c /* Shift on external clock */
106 #define SR_OUT 0x10 /* Shift out if 1 */
107
108 /* Bits in IFR and IER */
109 #define IER_SET 0x80 /* set bits in IER */
110 #define IER_CLR 0 /* clear bits in IER */
111 #define SR_INT 0x04 /* Shift register full/empty */
112 #define CB2_INT 0x08
113 #define CB1_INT 0x10 /* transition on CB1 input */
114
115 static volatile enum pmu_state {
116 idle,
117 sending,
118 intack,
119 reading,
120 reading_intr,
121 locked,
122 } pmu_state;
123
124 static volatile enum int_data_state {
125 int_data_empty,
126 int_data_fill,
127 int_data_ready,
128 int_data_flush
129 } int_data_state[2] = { int_data_empty, int_data_empty };
130
131 static struct adb_request *current_req;
132 static struct adb_request *last_req;
133 static struct adb_request *req_awaiting_reply;
134 static unsigned char interrupt_data[2][32];
135 static int interrupt_data_len[2];
136 static int int_data_last;
137 static unsigned char *reply_ptr;
138 static int data_index;
139 static int data_len;
140 static volatile int adb_int_pending;
141 static volatile int disable_poll;
142 static struct device_node *vias;
143 static int pmu_kind = PMU_UNKNOWN;
144 static int pmu_fully_inited = 0;
145 static int pmu_has_adb;
146 static struct device_node *gpio_node;
147 static unsigned char __iomem *gpio_reg = NULL;
148 static int gpio_irq = NO_IRQ;
149 static int gpio_irq_enabled = -1;
150 static volatile int pmu_suspended = 0;
151 static spinlock_t pmu_lock;
152 static u8 pmu_intr_mask;
153 static int pmu_version;
154 static int drop_interrupts;
155 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
156 static int option_lid_wakeup = 1;
157 #endif /* CONFIG_PM && CONFIG_PPC32 */
158 #if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT_LEGACY)
159 static int sleep_in_progress;
160 #endif
161 static unsigned long async_req_locks;
162 static unsigned int pmu_irq_stats[11];
163
164 static struct proc_dir_entry *proc_pmu_root;
165 static struct proc_dir_entry *proc_pmu_info;
166 static struct proc_dir_entry *proc_pmu_irqstats;
167 static struct proc_dir_entry *proc_pmu_options;
168 static int option_server_mode;
169
170 int pmu_battery_count;
171 int pmu_cur_battery;
172 unsigned int pmu_power_flags;
173 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
174 static int query_batt_timer = BATTERY_POLLING_COUNT;
175 static struct adb_request batt_req;
176 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
177
178 int __fake_sleep;
179 int asleep;
180 BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
181
182 #ifdef CONFIG_ADB
183 static int adb_dev_map = 0;
184 static int pmu_adb_flags;
185
186 static int pmu_probe(void);
187 static int pmu_init(void);
188 static int pmu_send_request(struct adb_request *req, int sync);
189 static int pmu_adb_autopoll(int devs);
190 static int pmu_adb_reset_bus(void);
191 #endif /* CONFIG_ADB */
192
193 static int init_pmu(void);
194 static void pmu_start(void);
195 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
196 static irqreturn_t gpio1_interrupt(int irq, void *arg);
197 static int proc_get_info(char *page, char **start, off_t off,
198 int count, int *eof, void *data);
199 static int proc_get_irqstats(char *page, char **start, off_t off,
200 int count, int *eof, void *data);
201 static void pmu_pass_intr(unsigned char *data, int len);
202 static int proc_get_batt(char *page, char **start, off_t off,
203 int count, int *eof, void *data);
204 static int proc_read_options(char *page, char **start, off_t off,
205 int count, int *eof, void *data);
206 static int proc_write_options(struct file *file, const char __user *buffer,
207 unsigned long count, void *data);
208
209 #ifdef CONFIG_ADB
210 struct adb_driver via_pmu_driver = {
211 "PMU",
212 pmu_probe,
213 pmu_init,
214 pmu_send_request,
215 pmu_adb_autopoll,
216 pmu_poll_adb,
217 pmu_adb_reset_bus
218 };
219 #endif /* CONFIG_ADB */
220
221 extern void low_sleep_handler(void);
222 extern void enable_kernel_altivec(void);
223 extern void enable_kernel_fp(void);
224
225 #ifdef DEBUG_SLEEP
226 int pmu_polled_request(struct adb_request *req);
227 int pmu_wink(struct adb_request *req);
228 #endif
229
230 /*
231 * This table indicates for each PMU opcode:
232 * - the number of data bytes to be sent with the command, or -1
233 * if a length byte should be sent,
234 * - the number of response bytes which the PMU will return, or
235 * -1 if it will send a length byte.
236 */
237 static const s8 pmu_data_len[256][2] = {
238 /* 0 1 2 3 4 5 6 7 */
239 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
240 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
241 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
242 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
243 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
244 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
245 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
246 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
247 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
248 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
249 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
250 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
251 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
252 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
253 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
254 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
255 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
256 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
257 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
258 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
259 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
260 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
261 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
262 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
263 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
264 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
265 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
266 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
267 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
268 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
269 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
270 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
271 };
272
273 static char *pbook_type[] = {
274 "Unknown PowerBook",
275 "PowerBook 2400/3400/3500(G3)",
276 "PowerBook G3 Series",
277 "1999 PowerBook G3",
278 "Core99"
279 };
280
281 int __init find_via_pmu(void)
282 {
283 u64 taddr;
284 const u32 *reg;
285
286 if (via != 0)
287 return 1;
288 vias = of_find_node_by_name(NULL, "via-pmu");
289 if (vias == NULL)
290 return 0;
291
292 reg = get_property(vias, "reg", NULL);
293 if (reg == NULL) {
294 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
295 goto fail;
296 }
297 taddr = of_translate_address(vias, reg);
298 if (taddr == OF_BAD_ADDR) {
299 printk(KERN_ERR "via-pmu: Can't translate address !\n");
300 goto fail;
301 }
302
303 spin_lock_init(&pmu_lock);
304
305 pmu_has_adb = 1;
306
307 pmu_intr_mask = PMU_INT_PCEJECT |
308 PMU_INT_SNDBRT |
309 PMU_INT_ADB |
310 PMU_INT_TICK;
311
312 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
313 || device_is_compatible(vias->parent, "ohare")))
314 pmu_kind = PMU_OHARE_BASED;
315 else if (device_is_compatible(vias->parent, "paddington"))
316 pmu_kind = PMU_PADDINGTON_BASED;
317 else if (device_is_compatible(vias->parent, "heathrow"))
318 pmu_kind = PMU_HEATHROW_BASED;
319 else if (device_is_compatible(vias->parent, "Keylargo")
320 || device_is_compatible(vias->parent, "K2-Keylargo")) {
321 struct device_node *gpiop;
322 u64 gaddr = OF_BAD_ADDR;
323
324 pmu_kind = PMU_KEYLARGO_BASED;
325 pmu_has_adb = (find_type_devices("adb") != NULL);
326 pmu_intr_mask = PMU_INT_PCEJECT |
327 PMU_INT_SNDBRT |
328 PMU_INT_ADB |
329 PMU_INT_TICK |
330 PMU_INT_ENVIRONMENT;
331
332 gpiop = of_find_node_by_name(NULL, "gpio");
333 if (gpiop) {
334 reg = get_property(gpiop, "reg", NULL);
335 if (reg)
336 gaddr = of_translate_address(gpiop, reg);
337 if (gaddr != OF_BAD_ADDR)
338 gpio_reg = ioremap(gaddr, 0x10);
339 }
340 if (gpio_reg == NULL) {
341 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
342 goto fail_gpio;
343 }
344 } else
345 pmu_kind = PMU_UNKNOWN;
346
347 via = ioremap(taddr, 0x2000);
348 if (via == NULL) {
349 printk(KERN_ERR "via-pmu: Can't map address !\n");
350 goto fail;
351 }
352
353 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
354 out_8(&via[IFR], 0x7f); /* clear IFR */
355
356 pmu_state = idle;
357
358 if (!init_pmu()) {
359 via = NULL;
360 return 0;
361 }
362
363 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
364 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
365
366 sys_ctrler = SYS_CTRLER_PMU;
367
368 return 1;
369 fail:
370 of_node_put(vias);
371 iounmap(gpio_reg);
372 gpio_reg = NULL;
373 fail_gpio:
374 vias = NULL;
375 return 0;
376 }
377
378 #ifdef CONFIG_ADB
379 static int pmu_probe(void)
380 {
381 return vias == NULL? -ENODEV: 0;
382 }
383
384 static int __init pmu_init(void)
385 {
386 if (vias == NULL)
387 return -ENODEV;
388 return 0;
389 }
390 #endif /* CONFIG_ADB */
391
392 /*
393 * We can't wait until pmu_init gets called, that happens too late.
394 * It happens after IDE and SCSI initialization, which can take a few
395 * seconds, and by that time the PMU could have given up on us and
396 * turned us off.
397 * Thus this is called with arch_initcall rather than device_initcall.
398 */
399 static int __init via_pmu_start(void)
400 {
401 unsigned int irq;
402
403 if (vias == NULL)
404 return -ENODEV;
405
406 batt_req.complete = 1;
407
408 irq = irq_of_parse_and_map(vias, 0);
409 if (irq == NO_IRQ) {
410 printk(KERN_ERR "via-pmu: can't map interruptn");
411 return -ENODEV;
412 }
413 if (request_irq(irq, via_pmu_interrupt, 0, "VIA-PMU", (void *)0)) {
414 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
415 return -ENODEV;
416 }
417
418 if (pmu_kind == PMU_KEYLARGO_BASED) {
419 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
420 if (gpio_node == NULL)
421 gpio_node = of_find_node_by_name(NULL,
422 "pmu-interrupt");
423 if (gpio_node)
424 gpio_irq = irq_of_parse_and_map(gpio_node, 0);
425
426 if (gpio_irq != NO_IRQ) {
427 if (request_irq(gpio_irq, gpio1_interrupt, 0,
428 "GPIO1 ADB", (void *)0))
429 printk(KERN_ERR "pmu: can't get irq %d"
430 " (GPIO1)\n", gpio_irq);
431 else
432 gpio_irq_enabled = 1;
433 }
434 }
435
436 /* Enable interrupts */
437 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
438
439 pmu_fully_inited = 1;
440
441 /* Make sure PMU settle down before continuing. This is _very_ important
442 * since the IDE probe may shut interrupts down for quite a bit of time. If
443 * a PMU communication is pending while this happens, the PMU may timeout
444 * Not that on Core99 machines, the PMU keeps sending us environement
445 * messages, we should find a way to either fix IDE or make it call
446 * pmu_suspend() before masking interrupts. This can also happens while
447 * scolling with some fbdevs.
448 */
449 do {
450 pmu_poll();
451 } while (pmu_state != idle);
452
453 return 0;
454 }
455
456 arch_initcall(via_pmu_start);
457
458 /*
459 * This has to be done after pci_init, which is a subsys_initcall.
460 */
461 static int __init via_pmu_dev_init(void)
462 {
463 if (vias == NULL)
464 return -ENODEV;
465
466 #ifdef CONFIG_PMAC_BACKLIGHT
467 /* Initialize backlight */
468 pmu_backlight_init();
469 #endif
470
471 #ifdef CONFIG_PPC32
472 if (machine_is_compatible("AAPL,3400/2400") ||
473 machine_is_compatible("AAPL,3500")) {
474 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
475 NULL, PMAC_MB_INFO_MODEL, 0);
476 pmu_battery_count = 1;
477 if (mb == PMAC_TYPE_COMET)
478 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
479 else
480 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
481 } else if (machine_is_compatible("AAPL,PowerBook1998") ||
482 machine_is_compatible("PowerBook1,1")) {
483 pmu_battery_count = 2;
484 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
485 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
486 } else {
487 struct device_node* prim = find_devices("power-mgt");
488 const u32 *prim_info = NULL;
489 if (prim)
490 prim_info = get_property(prim, "prim-info", NULL);
491 if (prim_info) {
492 /* Other stuffs here yet unknown */
493 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
494 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
495 if (pmu_battery_count > 1)
496 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
497 }
498 }
499 #endif /* CONFIG_PPC32 */
500
501 /* Create /proc/pmu */
502 proc_pmu_root = proc_mkdir("pmu", NULL);
503 if (proc_pmu_root) {
504 long i;
505
506 for (i=0; i<pmu_battery_count; i++) {
507 char title[16];
508 sprintf(title, "battery_%ld", i);
509 proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
510 proc_get_batt, (void *)i);
511 }
512
513 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
514 proc_get_info, NULL);
515 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
516 proc_get_irqstats, NULL);
517 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
518 if (proc_pmu_options) {
519 proc_pmu_options->nlink = 1;
520 proc_pmu_options->read_proc = proc_read_options;
521 proc_pmu_options->write_proc = proc_write_options;
522 }
523 }
524 return 0;
525 }
526
527 device_initcall(via_pmu_dev_init);
528
529 static int
530 init_pmu(void)
531 {
532 int timeout;
533 struct adb_request req;
534
535 out_8(&via[B], via[B] | TREQ); /* negate TREQ */
536 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */
537
538 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
539 timeout = 100000;
540 while (!req.complete) {
541 if (--timeout < 0) {
542 printk(KERN_ERR "init_pmu: no response from PMU\n");
543 return 0;
544 }
545 udelay(10);
546 pmu_poll();
547 }
548
549 /* ack all pending interrupts */
550 timeout = 100000;
551 interrupt_data[0][0] = 1;
552 while (interrupt_data[0][0] || pmu_state != idle) {
553 if (--timeout < 0) {
554 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
555 return 0;
556 }
557 if (pmu_state == idle)
558 adb_int_pending = 1;
559 via_pmu_interrupt(0, NULL);
560 udelay(10);
561 }
562
563 /* Tell PMU we are ready. */
564 if (pmu_kind == PMU_KEYLARGO_BASED) {
565 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
566 while (!req.complete)
567 pmu_poll();
568 }
569
570 /* Read PMU version */
571 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
572 pmu_wait_complete(&req);
573 if (req.reply_len > 0)
574 pmu_version = req.reply[0];
575
576 /* Read server mode setting */
577 if (pmu_kind == PMU_KEYLARGO_BASED) {
578 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
579 PMU_PWR_GET_POWERUP_EVENTS);
580 pmu_wait_complete(&req);
581 if (req.reply_len == 2) {
582 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
583 option_server_mode = 1;
584 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
585 option_server_mode ? "enabled" : "disabled");
586 }
587 }
588 return 1;
589 }
590
591 int
592 pmu_get_model(void)
593 {
594 return pmu_kind;
595 }
596
597 static void pmu_set_server_mode(int server_mode)
598 {
599 struct adb_request req;
600
601 if (pmu_kind != PMU_KEYLARGO_BASED)
602 return;
603
604 option_server_mode = server_mode;
605 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
606 pmu_wait_complete(&req);
607 if (req.reply_len < 2)
608 return;
609 if (server_mode)
610 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
611 PMU_PWR_SET_POWERUP_EVENTS,
612 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
613 else
614 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
615 PMU_PWR_CLR_POWERUP_EVENTS,
616 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
617 pmu_wait_complete(&req);
618 }
619
620 /* This new version of the code for 2400/3400/3500 powerbooks
621 * is inspired from the implementation in gkrellm-pmu
622 */
623 static void
624 done_battery_state_ohare(struct adb_request* req)
625 {
626 /* format:
627 * [0] : flags
628 * 0x01 : AC indicator
629 * 0x02 : charging
630 * 0x04 : battery exist
631 * 0x08 :
632 * 0x10 :
633 * 0x20 : full charged
634 * 0x40 : pcharge reset
635 * 0x80 : battery exist
636 *
637 * [1][2] : battery voltage
638 * [3] : CPU temperature
639 * [4] : battery temperature
640 * [5] : current
641 * [6][7] : pcharge
642 * --tkoba
643 */
644 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
645 long pcharge, charge, vb, vmax, lmax;
646 long vmax_charging, vmax_charged;
647 long amperage, voltage, time, max;
648 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
649 NULL, PMAC_MB_INFO_MODEL, 0);
650
651 if (req->reply[0] & 0x01)
652 pmu_power_flags |= PMU_PWR_AC_PRESENT;
653 else
654 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
655
656 if (mb == PMAC_TYPE_COMET) {
657 vmax_charged = 189;
658 vmax_charging = 213;
659 lmax = 6500;
660 } else {
661 vmax_charged = 330;
662 vmax_charging = 330;
663 lmax = 6500;
664 }
665 vmax = vmax_charged;
666
667 /* If battery installed */
668 if (req->reply[0] & 0x04) {
669 bat_flags |= PMU_BATT_PRESENT;
670 if (req->reply[0] & 0x02)
671 bat_flags |= PMU_BATT_CHARGING;
672 vb = (req->reply[1] << 8) | req->reply[2];
673 voltage = (vb * 265 + 72665) / 10;
674 amperage = req->reply[5];
675 if ((req->reply[0] & 0x01) == 0) {
676 if (amperage > 200)
677 vb += ((amperage - 200) * 15)/100;
678 } else if (req->reply[0] & 0x02) {
679 vb = (vb * 97) / 100;
680 vmax = vmax_charging;
681 }
682 charge = (100 * vb) / vmax;
683 if (req->reply[0] & 0x40) {
684 pcharge = (req->reply[6] << 8) + req->reply[7];
685 if (pcharge > lmax)
686 pcharge = lmax;
687 pcharge *= 100;
688 pcharge = 100 - pcharge / lmax;
689 if (pcharge < charge)
690 charge = pcharge;
691 }
692 if (amperage > 0)
693 time = (charge * 16440) / amperage;
694 else
695 time = 0;
696 max = 100;
697 amperage = -amperage;
698 } else
699 charge = max = amperage = voltage = time = 0;
700
701 pmu_batteries[pmu_cur_battery].flags = bat_flags;
702 pmu_batteries[pmu_cur_battery].charge = charge;
703 pmu_batteries[pmu_cur_battery].max_charge = max;
704 pmu_batteries[pmu_cur_battery].amperage = amperage;
705 pmu_batteries[pmu_cur_battery].voltage = voltage;
706 pmu_batteries[pmu_cur_battery].time_remaining = time;
707
708 clear_bit(0, &async_req_locks);
709 }
710
711 static void
712 done_battery_state_smart(struct adb_request* req)
713 {
714 /* format:
715 * [0] : format of this structure (known: 3,4,5)
716 * [1] : flags
717 *
718 * format 3 & 4:
719 *
720 * [2] : charge
721 * [3] : max charge
722 * [4] : current
723 * [5] : voltage
724 *
725 * format 5:
726 *
727 * [2][3] : charge
728 * [4][5] : max charge
729 * [6][7] : current
730 * [8][9] : voltage
731 */
732
733 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
734 int amperage;
735 unsigned int capa, max, voltage;
736
737 if (req->reply[1] & 0x01)
738 pmu_power_flags |= PMU_PWR_AC_PRESENT;
739 else
740 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
741
742
743 capa = max = amperage = voltage = 0;
744
745 if (req->reply[1] & 0x04) {
746 bat_flags |= PMU_BATT_PRESENT;
747 switch(req->reply[0]) {
748 case 3:
749 case 4: capa = req->reply[2];
750 max = req->reply[3];
751 amperage = *((signed char *)&req->reply[4]);
752 voltage = req->reply[5];
753 break;
754 case 5: capa = (req->reply[2] << 8) | req->reply[3];
755 max = (req->reply[4] << 8) | req->reply[5];
756 amperage = *((signed short *)&req->reply[6]);
757 voltage = (req->reply[8] << 8) | req->reply[9];
758 break;
759 default:
760 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
761 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
762 break;
763 }
764 }
765
766 if ((req->reply[1] & 0x01) && (amperage > 0))
767 bat_flags |= PMU_BATT_CHARGING;
768
769 pmu_batteries[pmu_cur_battery].flags = bat_flags;
770 pmu_batteries[pmu_cur_battery].charge = capa;
771 pmu_batteries[pmu_cur_battery].max_charge = max;
772 pmu_batteries[pmu_cur_battery].amperage = amperage;
773 pmu_batteries[pmu_cur_battery].voltage = voltage;
774 if (amperage) {
775 if ((req->reply[1] & 0x01) && (amperage > 0))
776 pmu_batteries[pmu_cur_battery].time_remaining
777 = ((max-capa) * 3600) / amperage;
778 else
779 pmu_batteries[pmu_cur_battery].time_remaining
780 = (capa * 3600) / (-amperage);
781 } else
782 pmu_batteries[pmu_cur_battery].time_remaining = 0;
783
784 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
785
786 clear_bit(0, &async_req_locks);
787 }
788
789 static void
790 query_battery_state(void)
791 {
792 if (test_and_set_bit(0, &async_req_locks))
793 return;
794 if (pmu_kind == PMU_OHARE_BASED)
795 pmu_request(&batt_req, done_battery_state_ohare,
796 1, PMU_BATTERY_STATE);
797 else
798 pmu_request(&batt_req, done_battery_state_smart,
799 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
800 }
801
802 static int
803 proc_get_info(char *page, char **start, off_t off,
804 int count, int *eof, void *data)
805 {
806 char* p = page;
807
808 p += sprintf(p, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
809 p += sprintf(p, "PMU firmware version : %02x\n", pmu_version);
810 p += sprintf(p, "AC Power : %d\n",
811 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
812 p += sprintf(p, "Battery count : %d\n", pmu_battery_count);
813
814 return p - page;
815 }
816
817 static int
818 proc_get_irqstats(char *page, char **start, off_t off,
819 int count, int *eof, void *data)
820 {
821 int i;
822 char* p = page;
823 static const char *irq_names[] = {
824 "Total CB1 triggered events",
825 "Total GPIO1 triggered events",
826 "PC-Card eject button",
827 "Sound/Brightness button",
828 "ADB message",
829 "Battery state change",
830 "Environment interrupt",
831 "Tick timer",
832 "Ghost interrupt (zero len)",
833 "Empty interrupt (empty mask)",
834 "Max irqs in a row"
835 };
836
837 for (i=0; i<11; i++) {
838 p += sprintf(p, " %2u: %10u (%s)\n",
839 i, pmu_irq_stats[i], irq_names[i]);
840 }
841 return p - page;
842 }
843
844 static int
845 proc_get_batt(char *page, char **start, off_t off,
846 int count, int *eof, void *data)
847 {
848 long batnum = (long)data;
849 char *p = page;
850
851 p += sprintf(p, "\n");
852 p += sprintf(p, "flags : %08x\n",
853 pmu_batteries[batnum].flags);
854 p += sprintf(p, "charge : %d\n",
855 pmu_batteries[batnum].charge);
856 p += sprintf(p, "max_charge : %d\n",
857 pmu_batteries[batnum].max_charge);
858 p += sprintf(p, "current : %d\n",
859 pmu_batteries[batnum].amperage);
860 p += sprintf(p, "voltage : %d\n",
861 pmu_batteries[batnum].voltage);
862 p += sprintf(p, "time rem. : %d\n",
863 pmu_batteries[batnum].time_remaining);
864
865 return p - page;
866 }
867
868 static int
869 proc_read_options(char *page, char **start, off_t off,
870 int count, int *eof, void *data)
871 {
872 char *p = page;
873
874 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
875 if (pmu_kind == PMU_KEYLARGO_BASED &&
876 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
877 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
878 #endif
879 if (pmu_kind == PMU_KEYLARGO_BASED)
880 p += sprintf(p, "server_mode=%d\n", option_server_mode);
881
882 return p - page;
883 }
884
885 static int
886 proc_write_options(struct file *file, const char __user *buffer,
887 unsigned long count, void *data)
888 {
889 char tmp[33];
890 char *label, *val;
891 unsigned long fcount = count;
892
893 if (!count)
894 return -EINVAL;
895 if (count > 32)
896 count = 32;
897 if (copy_from_user(tmp, buffer, count))
898 return -EFAULT;
899 tmp[count] = 0;
900
901 label = tmp;
902 while(*label == ' ')
903 label++;
904 val = label;
905 while(*val && (*val != '=')) {
906 if (*val == ' ')
907 *val = 0;
908 val++;
909 }
910 if ((*val) == 0)
911 return -EINVAL;
912 *(val++) = 0;
913 while(*val == ' ')
914 val++;
915 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
916 if (pmu_kind == PMU_KEYLARGO_BASED &&
917 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
918 if (!strcmp(label, "lid_wakeup"))
919 option_lid_wakeup = ((*val) == '1');
920 #endif
921 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
922 int new_value;
923 new_value = ((*val) == '1');
924 if (new_value != option_server_mode)
925 pmu_set_server_mode(new_value);
926 }
927 return fcount;
928 }
929
930 #ifdef CONFIG_ADB
931 /* Send an ADB command */
932 static int
933 pmu_send_request(struct adb_request *req, int sync)
934 {
935 int i, ret;
936
937 if ((vias == NULL) || (!pmu_fully_inited)) {
938 req->complete = 1;
939 return -ENXIO;
940 }
941
942 ret = -EINVAL;
943
944 switch (req->data[0]) {
945 case PMU_PACKET:
946 for (i = 0; i < req->nbytes - 1; ++i)
947 req->data[i] = req->data[i+1];
948 --req->nbytes;
949 if (pmu_data_len[req->data[0]][1] != 0) {
950 req->reply[0] = ADB_RET_OK;
951 req->reply_len = 1;
952 } else
953 req->reply_len = 0;
954 ret = pmu_queue_request(req);
955 break;
956 case CUDA_PACKET:
957 switch (req->data[1]) {
958 case CUDA_GET_TIME:
959 if (req->nbytes != 2)
960 break;
961 req->data[0] = PMU_READ_RTC;
962 req->nbytes = 1;
963 req->reply_len = 3;
964 req->reply[0] = CUDA_PACKET;
965 req->reply[1] = 0;
966 req->reply[2] = CUDA_GET_TIME;
967 ret = pmu_queue_request(req);
968 break;
969 case CUDA_SET_TIME:
970 if (req->nbytes != 6)
971 break;
972 req->data[0] = PMU_SET_RTC;
973 req->nbytes = 5;
974 for (i = 1; i <= 4; ++i)
975 req->data[i] = req->data[i+1];
976 req->reply_len = 3;
977 req->reply[0] = CUDA_PACKET;
978 req->reply[1] = 0;
979 req->reply[2] = CUDA_SET_TIME;
980 ret = pmu_queue_request(req);
981 break;
982 }
983 break;
984 case ADB_PACKET:
985 if (!pmu_has_adb)
986 return -ENXIO;
987 for (i = req->nbytes - 1; i > 1; --i)
988 req->data[i+2] = req->data[i];
989 req->data[3] = req->nbytes - 2;
990 req->data[2] = pmu_adb_flags;
991 /*req->data[1] = req->data[1];*/
992 req->data[0] = PMU_ADB_CMD;
993 req->nbytes += 2;
994 req->reply_expected = 1;
995 req->reply_len = 0;
996 ret = pmu_queue_request(req);
997 break;
998 }
999 if (ret) {
1000 req->complete = 1;
1001 return ret;
1002 }
1003
1004 if (sync)
1005 while (!req->complete)
1006 pmu_poll();
1007
1008 return 0;
1009 }
1010
1011 /* Enable/disable autopolling */
1012 static int
1013 pmu_adb_autopoll(int devs)
1014 {
1015 struct adb_request req;
1016
1017 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1018 return -ENXIO;
1019
1020 if (devs) {
1021 adb_dev_map = devs;
1022 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1023 adb_dev_map >> 8, adb_dev_map);
1024 pmu_adb_flags = 2;
1025 } else {
1026 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1027 pmu_adb_flags = 0;
1028 }
1029 while (!req.complete)
1030 pmu_poll();
1031 return 0;
1032 }
1033
1034 /* Reset the ADB bus */
1035 static int
1036 pmu_adb_reset_bus(void)
1037 {
1038 struct adb_request req;
1039 int save_autopoll = adb_dev_map;
1040
1041 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1042 return -ENXIO;
1043
1044 /* anyone got a better idea?? */
1045 pmu_adb_autopoll(0);
1046
1047 req.nbytes = 5;
1048 req.done = NULL;
1049 req.data[0] = PMU_ADB_CMD;
1050 req.data[1] = 0;
1051 req.data[2] = ADB_BUSRESET;
1052 req.data[3] = 0;
1053 req.data[4] = 0;
1054 req.reply_len = 0;
1055 req.reply_expected = 1;
1056 if (pmu_queue_request(&req) != 0) {
1057 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1058 return -EIO;
1059 }
1060 pmu_wait_complete(&req);
1061
1062 if (save_autopoll != 0)
1063 pmu_adb_autopoll(save_autopoll);
1064
1065 return 0;
1066 }
1067 #endif /* CONFIG_ADB */
1068
1069 /* Construct and send a pmu request */
1070 int
1071 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1072 int nbytes, ...)
1073 {
1074 va_list list;
1075 int i;
1076
1077 if (vias == NULL)
1078 return -ENXIO;
1079
1080 if (nbytes < 0 || nbytes > 32) {
1081 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1082 req->complete = 1;
1083 return -EINVAL;
1084 }
1085 req->nbytes = nbytes;
1086 req->done = done;
1087 va_start(list, nbytes);
1088 for (i = 0; i < nbytes; ++i)
1089 req->data[i] = va_arg(list, int);
1090 va_end(list);
1091 req->reply_len = 0;
1092 req->reply_expected = 0;
1093 return pmu_queue_request(req);
1094 }
1095
1096 int
1097 pmu_queue_request(struct adb_request *req)
1098 {
1099 unsigned long flags;
1100 int nsend;
1101
1102 if (via == NULL) {
1103 req->complete = 1;
1104 return -ENXIO;
1105 }
1106 if (req->nbytes <= 0) {
1107 req->complete = 1;
1108 return 0;
1109 }
1110 nsend = pmu_data_len[req->data[0]][0];
1111 if (nsend >= 0 && req->nbytes != nsend + 1) {
1112 req->complete = 1;
1113 return -EINVAL;
1114 }
1115
1116 req->next = NULL;
1117 req->sent = 0;
1118 req->complete = 0;
1119
1120 spin_lock_irqsave(&pmu_lock, flags);
1121 if (current_req != 0) {
1122 last_req->next = req;
1123 last_req = req;
1124 } else {
1125 current_req = req;
1126 last_req = req;
1127 if (pmu_state == idle)
1128 pmu_start();
1129 }
1130 spin_unlock_irqrestore(&pmu_lock, flags);
1131
1132 return 0;
1133 }
1134
1135 static inline void
1136 wait_for_ack(void)
1137 {
1138 /* Sightly increased the delay, I had one occurrence of the message
1139 * reported
1140 */
1141 int timeout = 4000;
1142 while ((in_8(&via[B]) & TACK) == 0) {
1143 if (--timeout < 0) {
1144 printk(KERN_ERR "PMU not responding (!ack)\n");
1145 return;
1146 }
1147 udelay(10);
1148 }
1149 }
1150
1151 /* New PMU seems to be very sensitive to those timings, so we make sure
1152 * PCI is flushed immediately */
1153 static inline void
1154 send_byte(int x)
1155 {
1156 volatile unsigned char __iomem *v = via;
1157
1158 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1159 out_8(&v[SR], x);
1160 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
1161 (void)in_8(&v[B]);
1162 }
1163
1164 static inline void
1165 recv_byte(void)
1166 {
1167 volatile unsigned char __iomem *v = via;
1168
1169 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1170 in_8(&v[SR]); /* resets SR */
1171 out_8(&v[B], in_8(&v[B]) & ~TREQ);
1172 (void)in_8(&v[B]);
1173 }
1174
1175 static inline void
1176 pmu_done(struct adb_request *req)
1177 {
1178 void (*done)(struct adb_request *) = req->done;
1179 mb();
1180 req->complete = 1;
1181 /* Here, we assume that if the request has a done member, the
1182 * struct request will survive to setting req->complete to 1
1183 */
1184 if (done)
1185 (*done)(req);
1186 }
1187
1188 static void
1189 pmu_start(void)
1190 {
1191 struct adb_request *req;
1192
1193 /* assert pmu_state == idle */
1194 /* get the packet to send */
1195 req = current_req;
1196 if (req == 0 || pmu_state != idle
1197 || (/*req->reply_expected && */req_awaiting_reply))
1198 return;
1199
1200 pmu_state = sending;
1201 data_index = 1;
1202 data_len = pmu_data_len[req->data[0]][0];
1203
1204 /* Sounds safer to make sure ACK is high before writing. This helped
1205 * kill a problem with ADB and some iBooks
1206 */
1207 wait_for_ack();
1208 /* set the shift register to shift out and send a byte */
1209 send_byte(req->data[0]);
1210 }
1211
1212 void
1213 pmu_poll(void)
1214 {
1215 if (!via)
1216 return;
1217 if (disable_poll)
1218 return;
1219 via_pmu_interrupt(0, NULL);
1220 }
1221
1222 void
1223 pmu_poll_adb(void)
1224 {
1225 if (!via)
1226 return;
1227 if (disable_poll)
1228 return;
1229 /* Kicks ADB read when PMU is suspended */
1230 adb_int_pending = 1;
1231 do {
1232 via_pmu_interrupt(0, NULL);
1233 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1234 || req_awaiting_reply));
1235 }
1236
1237 void
1238 pmu_wait_complete(struct adb_request *req)
1239 {
1240 if (!via)
1241 return;
1242 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1243 via_pmu_interrupt(0, NULL);
1244 }
1245
1246 /* This function loops until the PMU is idle and prevents it from
1247 * anwsering to ADB interrupts. pmu_request can still be called.
1248 * This is done to avoid spurrious shutdowns when we know we'll have
1249 * interrupts switched off for a long time
1250 */
1251 void
1252 pmu_suspend(void)
1253 {
1254 unsigned long flags;
1255 #ifdef SUSPEND_USES_PMU
1256 struct adb_request *req;
1257 #endif
1258 if (!via)
1259 return;
1260
1261 spin_lock_irqsave(&pmu_lock, flags);
1262 pmu_suspended++;
1263 if (pmu_suspended > 1) {
1264 spin_unlock_irqrestore(&pmu_lock, flags);
1265 return;
1266 }
1267
1268 do {
1269 spin_unlock_irqrestore(&pmu_lock, flags);
1270 if (req_awaiting_reply)
1271 adb_int_pending = 1;
1272 via_pmu_interrupt(0, NULL);
1273 spin_lock_irqsave(&pmu_lock, flags);
1274 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1275 #ifdef SUSPEND_USES_PMU
1276 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1277 spin_unlock_irqrestore(&pmu_lock, flags);
1278 while(!req.complete)
1279 pmu_poll();
1280 #else /* SUSPEND_USES_PMU */
1281 if (gpio_irq >= 0)
1282 disable_irq_nosync(gpio_irq);
1283 out_8(&via[IER], CB1_INT | IER_CLR);
1284 spin_unlock_irqrestore(&pmu_lock, flags);
1285 #endif /* SUSPEND_USES_PMU */
1286 break;
1287 }
1288 } while (1);
1289 }
1290
1291 void
1292 pmu_resume(void)
1293 {
1294 unsigned long flags;
1295
1296 if (!via || (pmu_suspended < 1))
1297 return;
1298
1299 spin_lock_irqsave(&pmu_lock, flags);
1300 pmu_suspended--;
1301 if (pmu_suspended > 0) {
1302 spin_unlock_irqrestore(&pmu_lock, flags);
1303 return;
1304 }
1305 adb_int_pending = 1;
1306 #ifdef SUSPEND_USES_PMU
1307 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1308 spin_unlock_irqrestore(&pmu_lock, flags);
1309 while(!req.complete)
1310 pmu_poll();
1311 #else /* SUSPEND_USES_PMU */
1312 if (gpio_irq >= 0)
1313 enable_irq(gpio_irq);
1314 out_8(&via[IER], CB1_INT | IER_SET);
1315 spin_unlock_irqrestore(&pmu_lock, flags);
1316 pmu_poll();
1317 #endif /* SUSPEND_USES_PMU */
1318 }
1319
1320 /* Interrupt data could be the result data from an ADB cmd */
1321 static void
1322 pmu_handle_data(unsigned char *data, int len)
1323 {
1324 unsigned char ints, pirq;
1325 int i = 0;
1326
1327 asleep = 0;
1328 if (drop_interrupts || len < 1) {
1329 adb_int_pending = 0;
1330 pmu_irq_stats[8]++;
1331 return;
1332 }
1333
1334 /* Get PMU interrupt mask */
1335 ints = data[0];
1336
1337 /* Record zero interrupts for stats */
1338 if (ints == 0)
1339 pmu_irq_stats[9]++;
1340
1341 /* Hack to deal with ADB autopoll flag */
1342 if (ints & PMU_INT_ADB)
1343 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1344
1345 next:
1346
1347 if (ints == 0) {
1348 if (i > pmu_irq_stats[10])
1349 pmu_irq_stats[10] = i;
1350 return;
1351 }
1352
1353 for (pirq = 0; pirq < 8; pirq++)
1354 if (ints & (1 << pirq))
1355 break;
1356 pmu_irq_stats[pirq]++;
1357 i++;
1358 ints &= ~(1 << pirq);
1359
1360 /* Note: for some reason, we get an interrupt with len=1,
1361 * data[0]==0 after each normal ADB interrupt, at least
1362 * on the Pismo. Still investigating... --BenH
1363 */
1364 if ((1 << pirq) & PMU_INT_ADB) {
1365 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1366 struct adb_request *req = req_awaiting_reply;
1367 if (req == 0) {
1368 printk(KERN_ERR "PMU: extra ADB reply\n");
1369 return;
1370 }
1371 req_awaiting_reply = NULL;
1372 if (len <= 2)
1373 req->reply_len = 0;
1374 else {
1375 memcpy(req->reply, data + 1, len - 1);
1376 req->reply_len = len - 1;
1377 }
1378 pmu_done(req);
1379 } else {
1380 if (len == 4 && data[1] == 0x2c) {
1381 extern int xmon_wants_key, xmon_adb_keycode;
1382 if (xmon_wants_key) {
1383 xmon_adb_keycode = data[2];
1384 return;
1385 }
1386 }
1387 #ifdef CONFIG_ADB
1388 /*
1389 * XXX On the [23]400 the PMU gives us an up
1390 * event for keycodes 0x74 or 0x75 when the PC
1391 * card eject buttons are released, so we
1392 * ignore those events.
1393 */
1394 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1395 && data[1] == 0x2c && data[3] == 0xff
1396 && (data[2] & ~1) == 0xf4))
1397 adb_input(data+1, len-1, 1);
1398 #endif /* CONFIG_ADB */
1399 }
1400 }
1401 /* Sound/brightness button pressed */
1402 else if ((1 << pirq) & PMU_INT_SNDBRT) {
1403 #ifdef CONFIG_PMAC_BACKLIGHT
1404 if (len == 3)
1405 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1406 #endif
1407 }
1408 /* Tick interrupt */
1409 else if ((1 << pirq) & PMU_INT_TICK) {
1410 /* Environement or tick interrupt, query batteries */
1411 if (pmu_battery_count) {
1412 if ((--query_batt_timer) == 0) {
1413 query_battery_state();
1414 query_batt_timer = BATTERY_POLLING_COUNT;
1415 }
1416 }
1417 }
1418 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1419 if (pmu_battery_count)
1420 query_battery_state();
1421 pmu_pass_intr(data, len);
1422 /* len == 6 is probably a bad check. But how do I
1423 * know what PMU versions send what events here? */
1424 if (len == 6) {
1425 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1426 via_pmu_event(PMU_EVT_LID, data[1]&1);
1427 }
1428 } else {
1429 pmu_pass_intr(data, len);
1430 }
1431 goto next;
1432 }
1433
1434 static struct adb_request*
1435 pmu_sr_intr(void)
1436 {
1437 struct adb_request *req;
1438 int bite = 0;
1439
1440 if (via[B] & TREQ) {
1441 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1442 out_8(&via[IFR], SR_INT);
1443 return NULL;
1444 }
1445 /* The ack may not yet be low when we get the interrupt */
1446 while ((in_8(&via[B]) & TACK) != 0)
1447 ;
1448
1449 /* if reading grab the byte, and reset the interrupt */
1450 if (pmu_state == reading || pmu_state == reading_intr)
1451 bite = in_8(&via[SR]);
1452
1453 /* reset TREQ and wait for TACK to go high */
1454 out_8(&via[B], in_8(&via[B]) | TREQ);
1455 wait_for_ack();
1456
1457 switch (pmu_state) {
1458 case sending:
1459 req = current_req;
1460 if (data_len < 0) {
1461 data_len = req->nbytes - 1;
1462 send_byte(data_len);
1463 break;
1464 }
1465 if (data_index <= data_len) {
1466 send_byte(req->data[data_index++]);
1467 break;
1468 }
1469 req->sent = 1;
1470 data_len = pmu_data_len[req->data[0]][1];
1471 if (data_len == 0) {
1472 pmu_state = idle;
1473 current_req = req->next;
1474 if (req->reply_expected)
1475 req_awaiting_reply = req;
1476 else
1477 return req;
1478 } else {
1479 pmu_state = reading;
1480 data_index = 0;
1481 reply_ptr = req->reply + req->reply_len;
1482 recv_byte();
1483 }
1484 break;
1485
1486 case intack:
1487 data_index = 0;
1488 data_len = -1;
1489 pmu_state = reading_intr;
1490 reply_ptr = interrupt_data[int_data_last];
1491 recv_byte();
1492 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1493 enable_irq(gpio_irq);
1494 gpio_irq_enabled = 1;
1495 }
1496 break;
1497
1498 case reading:
1499 case reading_intr:
1500 if (data_len == -1) {
1501 data_len = bite;
1502 if (bite > 32)
1503 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1504 } else if (data_index < 32) {
1505 reply_ptr[data_index++] = bite;
1506 }
1507 if (data_index < data_len) {
1508 recv_byte();
1509 break;
1510 }
1511
1512 if (pmu_state == reading_intr) {
1513 pmu_state = idle;
1514 int_data_state[int_data_last] = int_data_ready;
1515 interrupt_data_len[int_data_last] = data_len;
1516 } else {
1517 req = current_req;
1518 /*
1519 * For PMU sleep and freq change requests, we lock the
1520 * PMU until it's explicitely unlocked. This avoids any
1521 * spurrious event polling getting in
1522 */
1523 current_req = req->next;
1524 req->reply_len += data_index;
1525 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1526 pmu_state = locked;
1527 else
1528 pmu_state = idle;
1529 return req;
1530 }
1531 break;
1532
1533 default:
1534 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1535 pmu_state);
1536 }
1537 return NULL;
1538 }
1539
1540 static irqreturn_t
1541 via_pmu_interrupt(int irq, void *arg)
1542 {
1543 unsigned long flags;
1544 int intr;
1545 int nloop = 0;
1546 int int_data = -1;
1547 struct adb_request *req = NULL;
1548 int handled = 0;
1549
1550 /* This is a bit brutal, we can probably do better */
1551 spin_lock_irqsave(&pmu_lock, flags);
1552 ++disable_poll;
1553
1554 for (;;) {
1555 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1556 if (intr == 0)
1557 break;
1558 handled = 1;
1559 if (++nloop > 1000) {
1560 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1561 "intr=%x, ier=%x pmu_state=%d\n",
1562 intr, in_8(&via[IER]), pmu_state);
1563 break;
1564 }
1565 out_8(&via[IFR], intr);
1566 if (intr & CB1_INT) {
1567 adb_int_pending = 1;
1568 pmu_irq_stats[0]++;
1569 }
1570 if (intr & SR_INT) {
1571 req = pmu_sr_intr();
1572 if (req)
1573 break;
1574 }
1575 }
1576
1577 recheck:
1578 if (pmu_state == idle) {
1579 if (adb_int_pending) {
1580 if (int_data_state[0] == int_data_empty)
1581 int_data_last = 0;
1582 else if (int_data_state[1] == int_data_empty)
1583 int_data_last = 1;
1584 else
1585 goto no_free_slot;
1586 pmu_state = intack;
1587 int_data_state[int_data_last] = int_data_fill;
1588 /* Sounds safer to make sure ACK is high before writing.
1589 * This helped kill a problem with ADB and some iBooks
1590 */
1591 wait_for_ack();
1592 send_byte(PMU_INT_ACK);
1593 adb_int_pending = 0;
1594 } else if (current_req)
1595 pmu_start();
1596 }
1597 no_free_slot:
1598 /* Mark the oldest buffer for flushing */
1599 if (int_data_state[!int_data_last] == int_data_ready) {
1600 int_data_state[!int_data_last] = int_data_flush;
1601 int_data = !int_data_last;
1602 } else if (int_data_state[int_data_last] == int_data_ready) {
1603 int_data_state[int_data_last] = int_data_flush;
1604 int_data = int_data_last;
1605 }
1606 --disable_poll;
1607 spin_unlock_irqrestore(&pmu_lock, flags);
1608
1609 /* Deal with completed PMU requests outside of the lock */
1610 if (req) {
1611 pmu_done(req);
1612 req = NULL;
1613 }
1614
1615 /* Deal with interrupt datas outside of the lock */
1616 if (int_data >= 0) {
1617 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1618 spin_lock_irqsave(&pmu_lock, flags);
1619 ++disable_poll;
1620 int_data_state[int_data] = int_data_empty;
1621 int_data = -1;
1622 goto recheck;
1623 }
1624
1625 return IRQ_RETVAL(handled);
1626 }
1627
1628 void
1629 pmu_unlock(void)
1630 {
1631 unsigned long flags;
1632
1633 spin_lock_irqsave(&pmu_lock, flags);
1634 if (pmu_state == locked)
1635 pmu_state = idle;
1636 adb_int_pending = 1;
1637 spin_unlock_irqrestore(&pmu_lock, flags);
1638 }
1639
1640
1641 static irqreturn_t
1642 gpio1_interrupt(int irq, void *arg)
1643 {
1644 unsigned long flags;
1645
1646 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1647 spin_lock_irqsave(&pmu_lock, flags);
1648 if (gpio_irq_enabled > 0) {
1649 disable_irq_nosync(gpio_irq);
1650 gpio_irq_enabled = 0;
1651 }
1652 pmu_irq_stats[1]++;
1653 adb_int_pending = 1;
1654 spin_unlock_irqrestore(&pmu_lock, flags);
1655 via_pmu_interrupt(0, NULL);
1656 return IRQ_HANDLED;
1657 }
1658 return IRQ_NONE;
1659 }
1660
1661 void
1662 pmu_enable_irled(int on)
1663 {
1664 struct adb_request req;
1665
1666 if (vias == NULL)
1667 return ;
1668 if (pmu_kind == PMU_KEYLARGO_BASED)
1669 return ;
1670
1671 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1672 (on ? PMU_POW_ON : PMU_POW_OFF));
1673 pmu_wait_complete(&req);
1674 }
1675
1676 void
1677 pmu_restart(void)
1678 {
1679 struct adb_request req;
1680
1681 if (via == NULL)
1682 return;
1683
1684 local_irq_disable();
1685
1686 drop_interrupts = 1;
1687
1688 if (pmu_kind != PMU_KEYLARGO_BASED) {
1689 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1690 PMU_INT_TICK );
1691 while(!req.complete)
1692 pmu_poll();
1693 }
1694
1695 pmu_request(&req, NULL, 1, PMU_RESET);
1696 pmu_wait_complete(&req);
1697 for (;;)
1698 ;
1699 }
1700
1701 void
1702 pmu_shutdown(void)
1703 {
1704 struct adb_request req;
1705
1706 if (via == NULL)
1707 return;
1708
1709 local_irq_disable();
1710
1711 drop_interrupts = 1;
1712
1713 if (pmu_kind != PMU_KEYLARGO_BASED) {
1714 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1715 PMU_INT_TICK );
1716 pmu_wait_complete(&req);
1717 } else {
1718 /* Disable server mode on shutdown or we'll just
1719 * wake up again
1720 */
1721 pmu_set_server_mode(0);
1722 }
1723
1724 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1725 'M', 'A', 'T', 'T');
1726 pmu_wait_complete(&req);
1727 for (;;)
1728 ;
1729 }
1730
1731 int
1732 pmu_present(void)
1733 {
1734 return via != 0;
1735 }
1736
1737 #ifdef CONFIG_PM
1738
1739 static LIST_HEAD(sleep_notifiers);
1740
1741 int
1742 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
1743 {
1744 struct list_head *list;
1745 struct pmu_sleep_notifier *notifier;
1746
1747 for (list = sleep_notifiers.next; list != &sleep_notifiers;
1748 list = list->next) {
1749 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1750 if (n->priority > notifier->priority)
1751 break;
1752 }
1753 __list_add(&n->list, list->prev, list);
1754 return 0;
1755 }
1756 EXPORT_SYMBOL(pmu_register_sleep_notifier);
1757
1758 int
1759 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
1760 {
1761 if (n->list.next == 0)
1762 return -ENOENT;
1763 list_del(&n->list);
1764 n->list.next = NULL;
1765 return 0;
1766 }
1767 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
1768 #endif /* CONFIG_PM */
1769
1770 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1771
1772 /* Sleep is broadcast last-to-first */
1773 static int
1774 broadcast_sleep(int when, int fallback)
1775 {
1776 int ret = PBOOK_SLEEP_OK;
1777 struct list_head *list;
1778 struct pmu_sleep_notifier *notifier;
1779
1780 for (list = sleep_notifiers.prev; list != &sleep_notifiers;
1781 list = list->prev) {
1782 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1783 ret = notifier->notifier_call(notifier, when);
1784 if (ret != PBOOK_SLEEP_OK) {
1785 printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
1786 when, notifier, notifier->notifier_call);
1787 for (; list != &sleep_notifiers; list = list->next) {
1788 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1789 notifier->notifier_call(notifier, fallback);
1790 }
1791 return ret;
1792 }
1793 }
1794 return ret;
1795 }
1796
1797 /* Wake is broadcast first-to-last */
1798 static int
1799 broadcast_wake(void)
1800 {
1801 int ret = PBOOK_SLEEP_OK;
1802 struct list_head *list;
1803 struct pmu_sleep_notifier *notifier;
1804
1805 for (list = sleep_notifiers.next; list != &sleep_notifiers;
1806 list = list->next) {
1807 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1808 notifier->notifier_call(notifier, PBOOK_WAKE);
1809 }
1810 return ret;
1811 }
1812
1813 /*
1814 * This struct is used to store config register values for
1815 * PCI devices which may get powered off when we sleep.
1816 */
1817 static struct pci_save {
1818 #ifndef HACKED_PCI_SAVE
1819 u16 command;
1820 u16 cache_lat;
1821 u16 intr;
1822 u32 rom_address;
1823 #else
1824 u32 config[16];
1825 #endif
1826 } *pbook_pci_saves;
1827 static int pbook_npci_saves;
1828
1829 static void
1830 pbook_alloc_pci_save(void)
1831 {
1832 int npci;
1833 struct pci_dev *pd = NULL;
1834
1835 npci = 0;
1836 while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1837 ++npci;
1838 }
1839 if (npci == 0)
1840 return;
1841 pbook_pci_saves = (struct pci_save *)
1842 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
1843 pbook_npci_saves = npci;
1844 }
1845
1846 static void
1847 pbook_free_pci_save(void)
1848 {
1849 if (pbook_pci_saves == NULL)
1850 return;
1851 kfree(pbook_pci_saves);
1852 pbook_pci_saves = NULL;
1853 pbook_npci_saves = 0;
1854 }
1855
1856 static void
1857 pbook_pci_save(void)
1858 {
1859 struct pci_save *ps = pbook_pci_saves;
1860 struct pci_dev *pd = NULL;
1861 int npci = pbook_npci_saves;
1862
1863 if (ps == NULL)
1864 return;
1865
1866 while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1867 if (npci-- == 0) {
1868 pci_dev_put(pd);
1869 return;
1870 }
1871 #ifndef HACKED_PCI_SAVE
1872 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
1873 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
1874 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
1875 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
1876 #else
1877 int i;
1878 for (i=1;i<16;i++)
1879 pci_read_config_dword(pd, i<<4, &ps->config[i]);
1880 #endif
1881 ++ps;
1882 }
1883 }
1884
1885 /* For this to work, we must take care of a few things: If gmac was enabled
1886 * during boot, it will be in the pci dev list. If it's disabled at this point
1887 * (and it will probably be), then you can't access it's config space.
1888 */
1889 static void
1890 pbook_pci_restore(void)
1891 {
1892 u16 cmd;
1893 struct pci_save *ps = pbook_pci_saves - 1;
1894 struct pci_dev *pd = NULL;
1895 int npci = pbook_npci_saves;
1896 int j;
1897
1898 while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1899 #ifdef HACKED_PCI_SAVE
1900 int i;
1901 if (npci-- == 0) {
1902 pci_dev_put(pd);
1903 return;
1904 }
1905 ps++;
1906 for (i=2;i<16;i++)
1907 pci_write_config_dword(pd, i<<4, ps->config[i]);
1908 pci_write_config_dword(pd, 4, ps->config[1]);
1909 #else
1910 if (npci-- == 0)
1911 return;
1912 ps++;
1913 if (ps->command == 0)
1914 continue;
1915 pci_read_config_word(pd, PCI_COMMAND, &cmd);
1916 if ((ps->command & ~cmd) == 0)
1917 continue;
1918 switch (pd->hdr_type) {
1919 case PCI_HEADER_TYPE_NORMAL:
1920 for (j = 0; j < 6; ++j)
1921 pci_write_config_dword(pd,
1922 PCI_BASE_ADDRESS_0 + j*4,
1923 pd->resource[j].start);
1924 pci_write_config_dword(pd, PCI_ROM_ADDRESS,
1925 ps->rom_address);
1926 pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
1927 ps->cache_lat);
1928 pci_write_config_word(pd, PCI_INTERRUPT_LINE,
1929 ps->intr);
1930 pci_write_config_word(pd, PCI_COMMAND, ps->command);
1931 break;
1932 }
1933 #endif
1934 }
1935 }
1936
1937 #ifdef DEBUG_SLEEP
1938 /* N.B. This doesn't work on the 3400 */
1939 void
1940 pmu_blink(int n)
1941 {
1942 struct adb_request req;
1943
1944 memset(&req, 0, sizeof(req));
1945
1946 for (; n > 0; --n) {
1947 req.nbytes = 4;
1948 req.done = NULL;
1949 req.data[0] = 0xee;
1950 req.data[1] = 4;
1951 req.data[2] = 0;
1952 req.data[3] = 1;
1953 req.reply[0] = ADB_RET_OK;
1954 req.reply_len = 1;
1955 req.reply_expected = 0;
1956 pmu_polled_request(&req);
1957 mdelay(50);
1958 req.nbytes = 4;
1959 req.done = NULL;
1960 req.data[0] = 0xee;
1961 req.data[1] = 4;
1962 req.data[2] = 0;
1963 req.data[3] = 0;
1964 req.reply[0] = ADB_RET_OK;
1965 req.reply_len = 1;
1966 req.reply_expected = 0;
1967 pmu_polled_request(&req);
1968 mdelay(50);
1969 }
1970 mdelay(50);
1971 }
1972 #endif
1973
1974 /*
1975 * Put the powerbook to sleep.
1976 */
1977
1978 static u32 save_via[8];
1979
1980 static void
1981 save_via_state(void)
1982 {
1983 save_via[0] = in_8(&via[ANH]);
1984 save_via[1] = in_8(&via[DIRA]);
1985 save_via[2] = in_8(&via[B]);
1986 save_via[3] = in_8(&via[DIRB]);
1987 save_via[4] = in_8(&via[PCR]);
1988 save_via[5] = in_8(&via[ACR]);
1989 save_via[6] = in_8(&via[T1CL]);
1990 save_via[7] = in_8(&via[T1CH]);
1991 }
1992 static void
1993 restore_via_state(void)
1994 {
1995 out_8(&via[ANH], save_via[0]);
1996 out_8(&via[DIRA], save_via[1]);
1997 out_8(&via[B], save_via[2]);
1998 out_8(&via[DIRB], save_via[3]);
1999 out_8(&via[PCR], save_via[4]);
2000 out_8(&via[ACR], save_via[5]);
2001 out_8(&via[T1CL], save_via[6]);
2002 out_8(&via[T1CH], save_via[7]);
2003 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
2004 out_8(&via[IFR], 0x7f); /* clear IFR */
2005 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
2006 }
2007
2008 extern void pmu_backlight_set_sleep(int sleep);
2009
2010 static int
2011 pmac_suspend_devices(void)
2012 {
2013 int ret;
2014
2015 pm_prepare_console();
2016
2017 /* Notify old-style device drivers & userland */
2018 ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
2019 if (ret != PBOOK_SLEEP_OK) {
2020 printk(KERN_ERR "Sleep rejected by drivers\n");
2021 return -EBUSY;
2022 }
2023
2024 /* Sync the disks. */
2025 /* XXX It would be nice to have some way to ensure that
2026 * nobody is dirtying any new buffers while we wait. That
2027 * could be achieved using the refrigerator for processes
2028 * that swsusp uses
2029 */
2030 sys_sync();
2031
2032 /* Sleep can fail now. May not be very robust but useful for debugging */
2033 ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
2034 if (ret != PBOOK_SLEEP_OK) {
2035 printk(KERN_ERR "Driver sleep failed\n");
2036 return -EBUSY;
2037 }
2038
2039 /* Send suspend call to devices, hold the device core's dpm_sem */
2040 ret = device_suspend(PMSG_SUSPEND);
2041 if (ret) {
2042 broadcast_wake();
2043 printk(KERN_ERR "Driver sleep failed\n");
2044 return -EBUSY;
2045 }
2046
2047 #ifdef CONFIG_PMAC_BACKLIGHT
2048 /* Tell backlight code not to muck around with the chip anymore */
2049 pmu_backlight_set_sleep(1);
2050 #endif
2051
2052 /* Call platform functions marked "on sleep" */
2053 pmac_pfunc_i2c_suspend();
2054 pmac_pfunc_base_suspend();
2055
2056 /* Stop preemption */
2057 preempt_disable();
2058
2059 /* Make sure the decrementer won't interrupt us */
2060 asm volatile("mtdec %0" : : "r" (0x7fffffff));
2061 /* Make sure any pending DEC interrupt occurring while we did
2062 * the above didn't re-enable the DEC */
2063 mb();
2064 asm volatile("mtdec %0" : : "r" (0x7fffffff));
2065
2066 /* We can now disable MSR_EE. This code of course works properly only
2067 * on UP machines... For SMP, if we ever implement sleep, we'll have to
2068 * stop the "other" CPUs way before we do all that stuff.
2069 */
2070 local_irq_disable();
2071
2072 /* Broadcast power down irq
2073 * This isn't that useful in most cases (only directly wired devices can
2074 * use this but still... This will take care of sysdev's as well, so
2075 * we exit from here with local irqs disabled and PIC off.
2076 */
2077 ret = device_power_down(PMSG_SUSPEND);
2078 if (ret) {
2079 wakeup_decrementer();
2080 local_irq_enable();
2081 preempt_enable();
2082 device_resume();
2083 broadcast_wake();
2084 printk(KERN_ERR "Driver powerdown failed\n");
2085 return -EBUSY;
2086 }
2087
2088 /* Wait for completion of async requests */
2089 while (!batt_req.complete)
2090 pmu_poll();
2091
2092 /* Giveup the lazy FPU & vec so we don't have to back them
2093 * up from the low level code
2094 */
2095 enable_kernel_fp();
2096
2097 #ifdef CONFIG_ALTIVEC
2098 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2099 enable_kernel_altivec();
2100 #endif /* CONFIG_ALTIVEC */
2101
2102 return 0;
2103 }
2104
2105 static int
2106 pmac_wakeup_devices(void)
2107 {
2108 mdelay(100);
2109
2110 #ifdef CONFIG_PMAC_BACKLIGHT
2111 /* Tell backlight code it can use the chip again */
2112 pmu_backlight_set_sleep(0);
2113 #endif
2114
2115 /* Power back up system devices (including the PIC) */
2116 device_power_up();
2117
2118 /* Force a poll of ADB interrupts */
2119 adb_int_pending = 1;
2120 via_pmu_interrupt(0, NULL);
2121
2122 /* Restart jiffies & scheduling */
2123 wakeup_decrementer();
2124
2125 /* Re-enable local CPU interrupts */
2126 local_irq_enable();
2127 mdelay(10);
2128 preempt_enable();
2129
2130 /* Call platform functions marked "on wake" */
2131 pmac_pfunc_base_resume();
2132 pmac_pfunc_i2c_resume();
2133
2134 /* Resume devices */
2135 device_resume();
2136
2137 /* Notify old style drivers */
2138 broadcast_wake();
2139
2140 pm_restore_console();
2141
2142 return 0;
2143 }
2144
2145 #define GRACKLE_PM (1<<7)
2146 #define GRACKLE_DOZE (1<<5)
2147 #define GRACKLE_NAP (1<<4)
2148 #define GRACKLE_SLEEP (1<<3)
2149
2150 static int powerbook_sleep_grackle(void)
2151 {
2152 unsigned long save_l2cr;
2153 unsigned short pmcr1;
2154 struct adb_request req;
2155 int ret;
2156 struct pci_dev *grackle;
2157
2158 grackle = pci_find_slot(0, 0);
2159 if (!grackle)
2160 return -ENODEV;
2161
2162 ret = pmac_suspend_devices();
2163 if (ret) {
2164 printk(KERN_ERR "Sleep rejected by devices\n");
2165 return ret;
2166 }
2167
2168 /* Turn off various things. Darwin does some retry tests here... */
2169 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2170 pmu_wait_complete(&req);
2171 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2172 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2173 pmu_wait_complete(&req);
2174
2175 /* For 750, save backside cache setting and disable it */
2176 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
2177
2178 if (!__fake_sleep) {
2179 /* Ask the PMU to put us to sleep */
2180 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2181 pmu_wait_complete(&req);
2182 }
2183
2184 /* The VIA is supposed not to be restored correctly*/
2185 save_via_state();
2186 /* We shut down some HW */
2187 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2188
2189 pci_read_config_word(grackle, 0x70, &pmcr1);
2190 /* Apparently, MacOS uses NAP mode for Grackle ??? */
2191 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2192 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2193 pci_write_config_word(grackle, 0x70, pmcr1);
2194
2195 /* Call low-level ASM sleep handler */
2196 if (__fake_sleep)
2197 mdelay(5000);
2198 else
2199 low_sleep_handler();
2200
2201 /* We're awake again, stop grackle PM */
2202 pci_read_config_word(grackle, 0x70, &pmcr1);
2203 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2204 pci_write_config_word(grackle, 0x70, pmcr1);
2205
2206 /* Make sure the PMU is idle */
2207 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2208 restore_via_state();
2209
2210 /* Restore L2 cache */
2211 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2212 _set_L2CR(save_l2cr);
2213
2214 /* Restore userland MMU context */
2215 set_context(current->active_mm->context.id, current->active_mm->pgd);
2216
2217 /* Power things up */
2218 pmu_unlock();
2219 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2220 pmu_wait_complete(&req);
2221 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2222 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2223 pmu_wait_complete(&req);
2224 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2225 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2226 pmu_wait_complete(&req);
2227
2228 pmac_wakeup_devices();
2229
2230 return 0;
2231 }
2232
2233 static int
2234 powerbook_sleep_Core99(void)
2235 {
2236 unsigned long save_l2cr;
2237 unsigned long save_l3cr;
2238 struct adb_request req;
2239 int ret;
2240
2241 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2242 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2243 return -ENOSYS;
2244 }
2245
2246 if (num_online_cpus() > 1 || cpu_is_offline(0))
2247 return -EAGAIN;
2248
2249 ret = pmac_suspend_devices();
2250 if (ret) {
2251 printk(KERN_ERR "Sleep rejected by devices\n");
2252 return ret;
2253 }
2254
2255 /* Stop environment and ADB interrupts */
2256 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2257 pmu_wait_complete(&req);
2258
2259 /* Tell PMU what events will wake us up */
2260 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2261 0xff, 0xff);
2262 pmu_wait_complete(&req);
2263 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2264 0, PMU_PWR_WAKEUP_KEY |
2265 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2266 pmu_wait_complete(&req);
2267
2268 /* Save the state of the L2 and L3 caches */
2269 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
2270 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
2271
2272 if (!__fake_sleep) {
2273 /* Ask the PMU to put us to sleep */
2274 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2275 pmu_wait_complete(&req);
2276 }
2277
2278 /* The VIA is supposed not to be restored correctly*/
2279 save_via_state();
2280
2281 /* Shut down various ASICs. There's a chance that we can no longer
2282 * talk to the PMU after this, so I moved it to _after_ sending the
2283 * sleep command to it. Still need to be checked.
2284 */
2285 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2286
2287 /* Call low-level ASM sleep handler */
2288 if (__fake_sleep)
2289 mdelay(5000);
2290 else
2291 low_sleep_handler();
2292
2293 /* Restore Apple core ASICs state */
2294 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2295
2296 /* Restore VIA */
2297 restore_via_state();
2298
2299 /* tweak LPJ before cpufreq is there */
2300 loops_per_jiffy *= 2;
2301
2302 /* Restore video */
2303 pmac_call_early_video_resume();
2304
2305 /* Restore L2 cache */
2306 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2307 _set_L2CR(save_l2cr);
2308 /* Restore L3 cache */
2309 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2310 _set_L3CR(save_l3cr);
2311
2312 /* Restore userland MMU context */
2313 set_context(current->active_mm->context.id, current->active_mm->pgd);
2314
2315 /* Tell PMU we are ready */
2316 pmu_unlock();
2317 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2318 pmu_wait_complete(&req);
2319 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2320 pmu_wait_complete(&req);
2321
2322 /* Restore LPJ, cpufreq will adjust the cpu frequency */
2323 loops_per_jiffy /= 2;
2324
2325 pmac_wakeup_devices();
2326
2327 return 0;
2328 }
2329
2330 #define PB3400_MEM_CTRL 0xf8000000
2331 #define PB3400_MEM_CTRL_SLEEP 0x70
2332
2333 static int
2334 powerbook_sleep_3400(void)
2335 {
2336 int ret, i, x;
2337 unsigned int hid0;
2338 unsigned long p;
2339 struct adb_request sleep_req;
2340 void __iomem *mem_ctrl;
2341 unsigned int __iomem *mem_ctrl_sleep;
2342
2343 /* first map in the memory controller registers */
2344 mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2345 if (mem_ctrl == NULL) {
2346 printk("powerbook_sleep_3400: ioremap failed\n");
2347 return -ENOMEM;
2348 }
2349 mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2350
2351 /* Allocate room for PCI save */
2352 pbook_alloc_pci_save();
2353
2354 ret = pmac_suspend_devices();
2355 if (ret) {
2356 pbook_free_pci_save();
2357 printk(KERN_ERR "Sleep rejected by devices\n");
2358 return ret;
2359 }
2360
2361 /* Save the state of PCI config space for some slots */
2362 pbook_pci_save();
2363
2364 /* Set the memory controller to keep the memory refreshed
2365 while we're asleep */
2366 for (i = 0x403f; i >= 0x4000; --i) {
2367 out_be32(mem_ctrl_sleep, i);
2368 do {
2369 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2370 } while (x == 0);
2371 if (x >= 0x100)
2372 break;
2373 }
2374
2375 /* Ask the PMU to put us to sleep */
2376 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2377 while (!sleep_req.complete)
2378 mb();
2379
2380 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2381
2382 /* displacement-flush the L2 cache - necessary? */
2383 for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2384 i = *(volatile int *)p;
2385 asleep = 1;
2386
2387 /* Put the CPU into sleep mode */
2388 hid0 = mfspr(SPRN_HID0);
2389 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2390 mtspr(SPRN_HID0, hid0);
2391 mtmsr(mfmsr() | MSR_POW | MSR_EE);
2392 udelay(10);
2393
2394 /* OK, we're awake again, start restoring things */
2395 out_be32(mem_ctrl_sleep, 0x3f);
2396 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2397 pbook_pci_restore();
2398 pmu_unlock();
2399
2400 /* wait for the PMU interrupt sequence to complete */
2401 while (asleep)
2402 mb();
2403
2404 pmac_wakeup_devices();
2405 pbook_free_pci_save();
2406 iounmap(mem_ctrl);
2407
2408 return 0;
2409 }
2410
2411 #endif /* CONFIG_PM && CONFIG_PPC32 */
2412
2413 /*
2414 * Support for /dev/pmu device
2415 */
2416 #define RB_SIZE 0x10
2417 struct pmu_private {
2418 struct list_head list;
2419 int rb_get;
2420 int rb_put;
2421 struct rb_entry {
2422 unsigned short len;
2423 unsigned char data[16];
2424 } rb_buf[RB_SIZE];
2425 wait_queue_head_t wait;
2426 spinlock_t lock;
2427 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2428 int backlight_locker;
2429 #endif
2430 };
2431
2432 static LIST_HEAD(all_pmu_pvt);
2433 static DEFINE_SPINLOCK(all_pvt_lock);
2434
2435 static void
2436 pmu_pass_intr(unsigned char *data, int len)
2437 {
2438 struct pmu_private *pp;
2439 struct list_head *list;
2440 int i;
2441 unsigned long flags;
2442
2443 if (len > sizeof(pp->rb_buf[0].data))
2444 len = sizeof(pp->rb_buf[0].data);
2445 spin_lock_irqsave(&all_pvt_lock, flags);
2446 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2447 pp = list_entry(list, struct pmu_private, list);
2448 spin_lock(&pp->lock);
2449 i = pp->rb_put + 1;
2450 if (i >= RB_SIZE)
2451 i = 0;
2452 if (i != pp->rb_get) {
2453 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2454 rp->len = len;
2455 memcpy(rp->data, data, len);
2456 pp->rb_put = i;
2457 wake_up_interruptible(&pp->wait);
2458 }
2459 spin_unlock(&pp->lock);
2460 }
2461 spin_unlock_irqrestore(&all_pvt_lock, flags);
2462 }
2463
2464 static int
2465 pmu_open(struct inode *inode, struct file *file)
2466 {
2467 struct pmu_private *pp;
2468 unsigned long flags;
2469
2470 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2471 if (pp == 0)
2472 return -ENOMEM;
2473 pp->rb_get = pp->rb_put = 0;
2474 spin_lock_init(&pp->lock);
2475 init_waitqueue_head(&pp->wait);
2476 spin_lock_irqsave(&all_pvt_lock, flags);
2477 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2478 pp->backlight_locker = 0;
2479 #endif
2480 list_add(&pp->list, &all_pmu_pvt);
2481 spin_unlock_irqrestore(&all_pvt_lock, flags);
2482 file->private_data = pp;
2483 return 0;
2484 }
2485
2486 static ssize_t
2487 pmu_read(struct file *file, char __user *buf,
2488 size_t count, loff_t *ppos)
2489 {
2490 struct pmu_private *pp = file->private_data;
2491 DECLARE_WAITQUEUE(wait, current);
2492 unsigned long flags;
2493 int ret = 0;
2494
2495 if (count < 1 || pp == 0)
2496 return -EINVAL;
2497 if (!access_ok(VERIFY_WRITE, buf, count))
2498 return -EFAULT;
2499
2500 spin_lock_irqsave(&pp->lock, flags);
2501 add_wait_queue(&pp->wait, &wait);
2502 current->state = TASK_INTERRUPTIBLE;
2503
2504 for (;;) {
2505 ret = -EAGAIN;
2506 if (pp->rb_get != pp->rb_put) {
2507 int i = pp->rb_get;
2508 struct rb_entry *rp = &pp->rb_buf[i];
2509 ret = rp->len;
2510 spin_unlock_irqrestore(&pp->lock, flags);
2511 if (ret > count)
2512 ret = count;
2513 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2514 ret = -EFAULT;
2515 if (++i >= RB_SIZE)
2516 i = 0;
2517 spin_lock_irqsave(&pp->lock, flags);
2518 pp->rb_get = i;
2519 }
2520 if (ret >= 0)
2521 break;
2522 if (file->f_flags & O_NONBLOCK)
2523 break;
2524 ret = -ERESTARTSYS;
2525 if (signal_pending(current))
2526 break;
2527 spin_unlock_irqrestore(&pp->lock, flags);
2528 schedule();
2529 spin_lock_irqsave(&pp->lock, flags);
2530 }
2531 current->state = TASK_RUNNING;
2532 remove_wait_queue(&pp->wait, &wait);
2533 spin_unlock_irqrestore(&pp->lock, flags);
2534
2535 return ret;
2536 }
2537
2538 static ssize_t
2539 pmu_write(struct file *file, const char __user *buf,
2540 size_t count, loff_t *ppos)
2541 {
2542 return 0;
2543 }
2544
2545 static unsigned int
2546 pmu_fpoll(struct file *filp, poll_table *wait)
2547 {
2548 struct pmu_private *pp = filp->private_data;
2549 unsigned int mask = 0;
2550 unsigned long flags;
2551
2552 if (pp == 0)
2553 return 0;
2554 poll_wait(filp, &pp->wait, wait);
2555 spin_lock_irqsave(&pp->lock, flags);
2556 if (pp->rb_get != pp->rb_put)
2557 mask |= POLLIN;
2558 spin_unlock_irqrestore(&pp->lock, flags);
2559 return mask;
2560 }
2561
2562 static int
2563 pmu_release(struct inode *inode, struct file *file)
2564 {
2565 struct pmu_private *pp = file->private_data;
2566 unsigned long flags;
2567
2568 lock_kernel();
2569 if (pp != 0) {
2570 file->private_data = NULL;
2571 spin_lock_irqsave(&all_pvt_lock, flags);
2572 list_del(&pp->list);
2573 spin_unlock_irqrestore(&all_pvt_lock, flags);
2574
2575 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2576 if (pp->backlight_locker)
2577 pmac_backlight_enable();
2578 #endif
2579
2580 kfree(pp);
2581 }
2582 unlock_kernel();
2583 return 0;
2584 }
2585
2586 static int
2587 pmu_ioctl(struct inode * inode, struct file *filp,
2588 u_int cmd, u_long arg)
2589 {
2590 __u32 __user *argp = (__u32 __user *)arg;
2591 int error = -EINVAL;
2592
2593 switch (cmd) {
2594 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2595 case PMU_IOC_SLEEP:
2596 if (!capable(CAP_SYS_ADMIN))
2597 return -EACCES;
2598 if (sleep_in_progress)
2599 return -EBUSY;
2600 sleep_in_progress = 1;
2601 switch (pmu_kind) {
2602 case PMU_OHARE_BASED:
2603 error = powerbook_sleep_3400();
2604 break;
2605 case PMU_HEATHROW_BASED:
2606 case PMU_PADDINGTON_BASED:
2607 error = powerbook_sleep_grackle();
2608 break;
2609 case PMU_KEYLARGO_BASED:
2610 error = powerbook_sleep_Core99();
2611 break;
2612 default:
2613 error = -ENOSYS;
2614 }
2615 sleep_in_progress = 0;
2616 break;
2617 case PMU_IOC_CAN_SLEEP:
2618 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2619 return put_user(0, argp);
2620 else
2621 return put_user(1, argp);
2622 #endif /* CONFIG_PM && CONFIG_PPC32 */
2623
2624 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2625 /* Compatibility ioctl's for backlight */
2626 case PMU_IOC_GET_BACKLIGHT:
2627 {
2628 int brightness;
2629
2630 if (sleep_in_progress)
2631 return -EBUSY;
2632
2633 brightness = pmac_backlight_get_legacy_brightness();
2634 if (brightness < 0)
2635 return brightness;
2636 else
2637 return put_user(brightness, argp);
2638
2639 }
2640 case PMU_IOC_SET_BACKLIGHT:
2641 {
2642 int brightness;
2643
2644 if (sleep_in_progress)
2645 return -EBUSY;
2646
2647 error = get_user(brightness, argp);
2648 if (error)
2649 return error;
2650
2651 return pmac_backlight_set_legacy_brightness(brightness);
2652 }
2653 #ifdef CONFIG_INPUT_ADBHID
2654 case PMU_IOC_GRAB_BACKLIGHT: {
2655 struct pmu_private *pp = filp->private_data;
2656
2657 if (pp->backlight_locker)
2658 return 0;
2659
2660 pp->backlight_locker = 1;
2661 pmac_backlight_disable();
2662
2663 return 0;
2664 }
2665 #endif /* CONFIG_INPUT_ADBHID */
2666 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2667
2668 case PMU_IOC_GET_MODEL:
2669 return put_user(pmu_kind, argp);
2670 case PMU_IOC_HAS_ADB:
2671 return put_user(pmu_has_adb, argp);
2672 }
2673 return error;
2674 }
2675
2676 static struct file_operations pmu_device_fops = {
2677 .read = pmu_read,
2678 .write = pmu_write,
2679 .poll = pmu_fpoll,
2680 .ioctl = pmu_ioctl,
2681 .open = pmu_open,
2682 .release = pmu_release,
2683 };
2684
2685 static struct miscdevice pmu_device = {
2686 PMU_MINOR, "pmu", &pmu_device_fops
2687 };
2688
2689 static int pmu_device_init(void)
2690 {
2691 if (!via)
2692 return 0;
2693 if (misc_register(&pmu_device) < 0)
2694 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2695 return 0;
2696 }
2697 device_initcall(pmu_device_init);
2698
2699
2700 #ifdef DEBUG_SLEEP
2701 static inline void
2702 polled_handshake(volatile unsigned char __iomem *via)
2703 {
2704 via[B] &= ~TREQ; eieio();
2705 while ((via[B] & TACK) != 0)
2706 ;
2707 via[B] |= TREQ; eieio();
2708 while ((via[B] & TACK) == 0)
2709 ;
2710 }
2711
2712 static inline void
2713 polled_send_byte(volatile unsigned char __iomem *via, int x)
2714 {
2715 via[ACR] |= SR_OUT | SR_EXT; eieio();
2716 via[SR] = x; eieio();
2717 polled_handshake(via);
2718 }
2719
2720 static inline int
2721 polled_recv_byte(volatile unsigned char __iomem *via)
2722 {
2723 int x;
2724
2725 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2726 x = via[SR]; eieio();
2727 polled_handshake(via);
2728 x = via[SR]; eieio();
2729 return x;
2730 }
2731
2732 int
2733 pmu_polled_request(struct adb_request *req)
2734 {
2735 unsigned long flags;
2736 int i, l, c;
2737 volatile unsigned char __iomem *v = via;
2738
2739 req->complete = 1;
2740 c = req->data[0];
2741 l = pmu_data_len[c][0];
2742 if (l >= 0 && req->nbytes != l + 1)
2743 return -EINVAL;
2744
2745 local_irq_save(flags);
2746 while (pmu_state != idle)
2747 pmu_poll();
2748
2749 while ((via[B] & TACK) == 0)
2750 ;
2751 polled_send_byte(v, c);
2752 if (l < 0) {
2753 l = req->nbytes - 1;
2754 polled_send_byte(v, l);
2755 }
2756 for (i = 1; i <= l; ++i)
2757 polled_send_byte(v, req->data[i]);
2758
2759 l = pmu_data_len[c][1];
2760 if (l < 0)
2761 l = polled_recv_byte(v);
2762 for (i = 0; i < l; ++i)
2763 req->reply[i + req->reply_len] = polled_recv_byte(v);
2764
2765 if (req->done)
2766 (*req->done)(req);
2767
2768 local_irq_restore(flags);
2769 return 0;
2770 }
2771 #endif /* DEBUG_SLEEP */
2772
2773
2774 /* FIXME: This is a temporary set of callbacks to enable us
2775 * to do suspend-to-disk.
2776 */
2777
2778 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2779
2780 static int pmu_sys_suspended = 0;
2781
2782 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2783 {
2784 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2785 return 0;
2786
2787 /* Suspend PMU event interrupts */
2788 pmu_suspend();
2789
2790 pmu_sys_suspended = 1;
2791 return 0;
2792 }
2793
2794 static int pmu_sys_resume(struct sys_device *sysdev)
2795 {
2796 struct adb_request req;
2797
2798 if (!pmu_sys_suspended)
2799 return 0;
2800
2801 /* Tell PMU we are ready */
2802 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2803 pmu_wait_complete(&req);
2804
2805 /* Resume PMU event interrupts */
2806 pmu_resume();
2807
2808 pmu_sys_suspended = 0;
2809
2810 return 0;
2811 }
2812
2813 #endif /* CONFIG_PM && CONFIG_PPC32 */
2814
2815 static struct sysdev_class pmu_sysclass = {
2816 set_kset_name("pmu"),
2817 };
2818
2819 static struct sys_device device_pmu = {
2820 .id = 0,
2821 .cls = &pmu_sysclass,
2822 };
2823
2824 static struct sysdev_driver driver_pmu = {
2825 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2826 .suspend = &pmu_sys_suspend,
2827 .resume = &pmu_sys_resume,
2828 #endif /* CONFIG_PM && CONFIG_PPC32 */
2829 };
2830
2831 static int __init init_pmu_sysfs(void)
2832 {
2833 int rc;
2834
2835 rc = sysdev_class_register(&pmu_sysclass);
2836 if (rc) {
2837 printk(KERN_ERR "Failed registering PMU sys class\n");
2838 return -ENODEV;
2839 }
2840 rc = sysdev_register(&device_pmu);
2841 if (rc) {
2842 printk(KERN_ERR "Failed registering PMU sys device\n");
2843 return -ENODEV;
2844 }
2845 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2846 if (rc) {
2847 printk(KERN_ERR "Failed registering PMU sys driver\n");
2848 return -ENODEV;
2849 }
2850 return 0;
2851 }
2852
2853 subsys_initcall(init_pmu_sysfs);
2854
2855 EXPORT_SYMBOL(pmu_request);
2856 EXPORT_SYMBOL(pmu_queue_request);
2857 EXPORT_SYMBOL(pmu_poll);
2858 EXPORT_SYMBOL(pmu_poll_adb);
2859 EXPORT_SYMBOL(pmu_wait_complete);
2860 EXPORT_SYMBOL(pmu_suspend);
2861 EXPORT_SYMBOL(pmu_resume);
2862 EXPORT_SYMBOL(pmu_unlock);
2863 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2864 EXPORT_SYMBOL(pmu_enable_irled);
2865 EXPORT_SYMBOL(pmu_battery_count);
2866 EXPORT_SYMBOL(pmu_batteries);
2867 EXPORT_SYMBOL(pmu_power_flags);
2868 #endif /* CONFIG_PM && CONFIG_PPC32 */
2869
Linus' kernel tree