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Linux v2.6.18-rc5
[pohmelfs.git] / drivers / macintosh / via-pmu.c
blobea386801e215976ae002604f070c01ba9a224d1f
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/suspend.h>
46 #include <linux/syscalls.h>
47 #include <linux/cpu.h>
48 #include <asm/prom.h>
49 #include <asm/machdep.h>
50 #include <asm/io.h>
51 #include <asm/pgtable.h>
52 #include <asm/system.h>
53 #include <asm/sections.h>
54 #include <asm/irq.h>
55 #include <asm/pmac_feature.h>
56 #include <asm/pmac_pfunc.h>
57 #include <asm/pmac_low_i2c.h>
58 #include <asm/uaccess.h>
59 #include <asm/mmu_context.h>
60 #include <asm/cputable.h>
61 #include <asm/time.h>
62 #include <asm/backlight.h>
63
64 #include "via-pmu-event.h"
65
66 /* Some compile options */
67 #undef SUSPEND_USES_PMU
68 #define DEBUG_SLEEP
69 #undef HACKED_PCI_SAVE
70
71 /* Misc minor number allocated for /dev/pmu */
72 #define PMU_MINOR 154
73
74 /* How many iterations between battery polls */
75 #define BATTERY_POLLING_COUNT 2
76
77 static volatile unsigned char __iomem *via;
78
79 /* VIA registers - spaced 0x200 bytes apart */
80 #define RS 0x200 /* skip between registers */
81 #define B 0 /* B-side data */
82 #define A RS /* A-side data */
83 #define DIRB (2*RS) /* B-side direction (1=output) */
84 #define DIRA (3*RS) /* A-side direction (1=output) */
85 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
86 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
87 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
88 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
89 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
90 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
91 #define SR (10*RS) /* Shift register */
92 #define ACR (11*RS) /* Auxiliary control register */
93 #define PCR (12*RS) /* Peripheral control register */
94 #define IFR (13*RS) /* Interrupt flag register */
95 #define IER (14*RS) /* Interrupt enable register */
96 #define ANH (15*RS) /* A-side data, no handshake */
97
98 /* Bits in B data register: both active low */
99 #define TACK 0x08 /* Transfer acknowledge (input) */
100 #define TREQ 0x10 /* Transfer request (output) */
101
102 /* Bits in ACR */
103 #define SR_CTRL 0x1c /* Shift register control bits */
104 #define SR_EXT 0x0c /* Shift on external clock */
105 #define SR_OUT 0x10 /* Shift out if 1 */
106
107 /* Bits in IFR and IER */
108 #define IER_SET 0x80 /* set bits in IER */
109 #define IER_CLR 0 /* clear bits in IER */
110 #define SR_INT 0x04 /* Shift register full/empty */
111 #define CB2_INT 0x08
112 #define CB1_INT 0x10 /* transition on CB1 input */
113
114 static volatile enum pmu_state {
115 idle,
116 sending,
117 intack,
118 reading,
119 reading_intr,
120 locked,
121 } pmu_state;
122
123 static volatile enum int_data_state {
124 int_data_empty,
125 int_data_fill,
126 int_data_ready,
127 int_data_flush
128 } int_data_state[2] = { int_data_empty, int_data_empty };
129
130 static struct adb_request *current_req;
131 static struct adb_request *last_req;
132 static struct adb_request *req_awaiting_reply;
133 static unsigned char interrupt_data[2][32];
134 static int interrupt_data_len[2];
135 static int int_data_last;
136 static unsigned char *reply_ptr;
137 static int data_index;
138 static int data_len;
139 static volatile int adb_int_pending;
140 static volatile int disable_poll;
141 static struct device_node *vias;
142 static int pmu_kind = PMU_UNKNOWN;
143 static int pmu_fully_inited = 0;
144 static int pmu_has_adb;
145 static struct device_node *gpio_node;
146 static unsigned char __iomem *gpio_reg = NULL;
147 static int gpio_irq = NO_IRQ;
148 static int gpio_irq_enabled = -1;
149 static volatile int pmu_suspended = 0;
150 static spinlock_t pmu_lock;
151 static u8 pmu_intr_mask;
152 static int pmu_version;
153 static int drop_interrupts;
154 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
155 static int option_lid_wakeup = 1;
156 #endif /* CONFIG_PM && CONFIG_PPC32 */
157 #if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT_LEGACY)
158 static int sleep_in_progress;
159 #endif
160 static unsigned long async_req_locks;
161 static unsigned int pmu_irq_stats[11];
162
163 static struct proc_dir_entry *proc_pmu_root;
164 static struct proc_dir_entry *proc_pmu_info;
165 static struct proc_dir_entry *proc_pmu_irqstats;
166 static struct proc_dir_entry *proc_pmu_options;
167 static int option_server_mode;
168
169 int pmu_battery_count;
170 int pmu_cur_battery;
171 unsigned int pmu_power_flags;
172 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
173 static int query_batt_timer = BATTERY_POLLING_COUNT;
174 static struct adb_request batt_req;
175 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
176
177 int __fake_sleep;
178 int asleep;
179 BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
180
181 #ifdef CONFIG_ADB
182 static int adb_dev_map = 0;
183 static int pmu_adb_flags;
184
185 static int pmu_probe(void);
186 static int pmu_init(void);
187 static int pmu_send_request(struct adb_request *req, int sync);
188 static int pmu_adb_autopoll(int devs);
189 static int pmu_adb_reset_bus(void);
190 #endif /* CONFIG_ADB */
191
192 static int init_pmu(void);
193 static void pmu_start(void);
194 static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
195 static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
196 static int proc_get_info(char *page, char **start, off_t off,
197 int count, int *eof, void *data);
198 static int proc_get_irqstats(char *page, char **start, off_t off,
199 int count, int *eof, void *data);
200 static void pmu_pass_intr(unsigned char *data, int len);
201 static int proc_get_batt(char *page, char **start, off_t off,
202 int count, int *eof, void *data);
203 static int proc_read_options(char *page, char **start, off_t off,
204 int count, int *eof, void *data);
205 static int proc_write_options(struct file *file, const char __user *buffer,
206 unsigned long count, void *data);
207
208 #ifdef CONFIG_ADB
209 struct adb_driver via_pmu_driver = {
210 "PMU",
211 pmu_probe,
212 pmu_init,
213 pmu_send_request,
214 pmu_adb_autopoll,
215 pmu_poll_adb,
216 pmu_adb_reset_bus
217 };
218 #endif /* CONFIG_ADB */
219
220 extern void low_sleep_handler(void);
221 extern void enable_kernel_altivec(void);
222 extern void enable_kernel_fp(void);
223
224 #ifdef DEBUG_SLEEP
225 int pmu_polled_request(struct adb_request *req);
226 int pmu_wink(struct adb_request *req);
227 #endif
228
229 /*
230 * This table indicates for each PMU opcode:
231 * - the number of data bytes to be sent with the command, or -1
232 * if a length byte should be sent,
233 * - the number of response bytes which the PMU will return, or
234 * -1 if it will send a length byte.
235 */
236 static const s8 pmu_data_len[256][2] = {
237 /* 0 1 2 3 4 5 6 7 */
238 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
239 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
240 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
241 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
242 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
243 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
244 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
245 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
246 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
247 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
248 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
249 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
250 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
251 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
252 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
253 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
254 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
255 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
256 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
257 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
258 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
259 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
260 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
261 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
262 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
263 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
264 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
265 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
266 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
267 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
268 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
269 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
270 };
271
272 static char *pbook_type[] = {
273 "Unknown PowerBook",
274 "PowerBook 2400/3400/3500(G3)",
275 "PowerBook G3 Series",
276 "1999 PowerBook G3",
277 "Core99"
278 };
279
280 int __init find_via_pmu(void)
281 {
282 u64 taddr;
283 u32 *reg;
284
285 if (via != 0)
286 return 1;
287 vias = of_find_node_by_name(NULL, "via-pmu");
288 if (vias == NULL)
289 return 0;
290
291 reg = (u32 *)get_property(vias, "reg", NULL);
292 if (reg == NULL) {
293 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
294 goto fail;
295 }
296 taddr = of_translate_address(vias, reg);
297 if (taddr == OF_BAD_ADDR) {
298 printk(KERN_ERR "via-pmu: Can't translate address !\n");
299 goto fail;
300 }
301
302 spin_lock_init(&pmu_lock);
303
304 pmu_has_adb = 1;
305
306 pmu_intr_mask = PMU_INT_PCEJECT |
307 PMU_INT_SNDBRT |
308 PMU_INT_ADB |
309 PMU_INT_TICK;
310
311 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
312 || device_is_compatible(vias->parent, "ohare")))
313 pmu_kind = PMU_OHARE_BASED;
314 else if (device_is_compatible(vias->parent, "paddington"))
315 pmu_kind = PMU_PADDINGTON_BASED;
316 else if (device_is_compatible(vias->parent, "heathrow"))
317 pmu_kind = PMU_HEATHROW_BASED;
318 else if (device_is_compatible(vias->parent, "Keylargo")
319 || device_is_compatible(vias->parent, "K2-Keylargo")) {
320 struct device_node *gpiop;
321 u64 gaddr = OF_BAD_ADDR;
322
323 pmu_kind = PMU_KEYLARGO_BASED;
324 pmu_has_adb = (find_type_devices("adb") != NULL);
325 pmu_intr_mask = PMU_INT_PCEJECT |
326 PMU_INT_SNDBRT |
327 PMU_INT_ADB |
328 PMU_INT_TICK |
329 PMU_INT_ENVIRONMENT;
330
331 gpiop = of_find_node_by_name(NULL, "gpio");
332 if (gpiop) {
333 reg = (u32 *)get_property(gpiop, "reg", NULL);
334 if (reg)
335 gaddr = of_translate_address(gpiop, reg);
336 if (gaddr != OF_BAD_ADDR)
337 gpio_reg = ioremap(gaddr, 0x10);
338 }
339 if (gpio_reg == NULL)
340 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
341 } else
342 pmu_kind = PMU_UNKNOWN;
343
344 via = ioremap(taddr, 0x2000);
345 if (via == NULL) {
346 printk(KERN_ERR "via-pmu: Can't map address !\n");
347 goto fail;
348 }
349
350 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
351 out_8(&via[IFR], 0x7f); /* clear IFR */
352
353 pmu_state = idle;
354
355 if (!init_pmu()) {
356 via = NULL;
357 return 0;
358 }
359
360 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
361 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
362
363 sys_ctrler = SYS_CTRLER_PMU;
364
365 return 1;
366 fail:
367 of_node_put(vias);
368 vias = NULL;
369 return 0;
370 }
371
372 #ifdef CONFIG_ADB
373 static int pmu_probe(void)
374 {
375 return vias == NULL? -ENODEV: 0;
376 }
377
378 static int __init pmu_init(void)
379 {
380 if (vias == NULL)
381 return -ENODEV;
382 return 0;
383 }
384 #endif /* CONFIG_ADB */
385
386 /*
387 * We can't wait until pmu_init gets called, that happens too late.
388 * It happens after IDE and SCSI initialization, which can take a few
389 * seconds, and by that time the PMU could have given up on us and
390 * turned us off.
391 * Thus this is called with arch_initcall rather than device_initcall.
392 */
393 static int __init via_pmu_start(void)
394 {
395 unsigned int irq;
396
397 if (vias == NULL)
398 return -ENODEV;
399
400 batt_req.complete = 1;
401
402 irq = irq_of_parse_and_map(vias, 0);
403 if (irq == NO_IRQ) {
404 printk(KERN_ERR "via-pmu: can't map interruptn");
405 return -ENODEV;
406 }
407 if (request_irq(irq, via_pmu_interrupt, 0, "VIA-PMU", (void *)0)) {
408 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
409 return -ENODEV;
410 }
411
412 if (pmu_kind == PMU_KEYLARGO_BASED) {
413 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
414 if (gpio_node == NULL)
415 gpio_node = of_find_node_by_name(NULL,
416 "pmu-interrupt");
417 if (gpio_node)
418 gpio_irq = irq_of_parse_and_map(gpio_node, 0);
419
420 if (gpio_irq != NO_IRQ) {
421 if (request_irq(gpio_irq, gpio1_interrupt, 0,
422 "GPIO1 ADB", (void *)0))
423 printk(KERN_ERR "pmu: can't get irq %d"
424 " (GPIO1)\n", gpio_irq);
425 else
426 gpio_irq_enabled = 1;
427 }
428 }
429
430 /* Enable interrupts */
431 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
432
433 pmu_fully_inited = 1;
434
435 /* Make sure PMU settle down before continuing. This is _very_ important
436 * since the IDE probe may shut interrupts down for quite a bit of time. If
437 * a PMU communication is pending while this happens, the PMU may timeout
438 * Not that on Core99 machines, the PMU keeps sending us environement
439 * messages, we should find a way to either fix IDE or make it call
440 * pmu_suspend() before masking interrupts. This can also happens while
441 * scolling with some fbdevs.
442 */
443 do {
444 pmu_poll();
445 } while (pmu_state != idle);
446
447 return 0;
448 }
449
450 arch_initcall(via_pmu_start);
451
452 /*
453 * This has to be done after pci_init, which is a subsys_initcall.
454 */
455 static int __init via_pmu_dev_init(void)
456 {
457 if (vias == NULL)
458 return -ENODEV;
459
460 #ifdef CONFIG_PMAC_BACKLIGHT
461 /* Initialize backlight */
462 pmu_backlight_init();
463 #endif
464
465 #ifdef CONFIG_PPC32
466 if (machine_is_compatible("AAPL,3400/2400") ||
467 machine_is_compatible("AAPL,3500")) {
468 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
469 NULL, PMAC_MB_INFO_MODEL, 0);
470 pmu_battery_count = 1;
471 if (mb == PMAC_TYPE_COMET)
472 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
473 else
474 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
475 } else if (machine_is_compatible("AAPL,PowerBook1998") ||
476 machine_is_compatible("PowerBook1,1")) {
477 pmu_battery_count = 2;
478 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
479 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
480 } else {
481 struct device_node* prim = find_devices("power-mgt");
482 u32 *prim_info = NULL;
483 if (prim)
484 prim_info = (u32 *)get_property(prim, "prim-info", NULL);
485 if (prim_info) {
486 /* Other stuffs here yet unknown */
487 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
488 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
489 if (pmu_battery_count > 1)
490 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
491 }
492 }
493 #endif /* CONFIG_PPC32 */
494
495 /* Create /proc/pmu */
496 proc_pmu_root = proc_mkdir("pmu", NULL);
497 if (proc_pmu_root) {
498 long i;
499
500 for (i=0; i<pmu_battery_count; i++) {
501 char title[16];
502 sprintf(title, "battery_%ld", i);
503 proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
504 proc_get_batt, (void *)i);
505 }
506
507 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
508 proc_get_info, NULL);
509 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
510 proc_get_irqstats, NULL);
511 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
512 if (proc_pmu_options) {
513 proc_pmu_options->nlink = 1;
514 proc_pmu_options->read_proc = proc_read_options;
515 proc_pmu_options->write_proc = proc_write_options;
516 }
517 }
518 return 0;
519 }
520
521 device_initcall(via_pmu_dev_init);
522
523 static int
524 init_pmu(void)
525 {
526 int timeout;
527 struct adb_request req;
528
529 out_8(&via[B], via[B] | TREQ); /* negate TREQ */
530 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */
531
532 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
533 timeout = 100000;
534 while (!req.complete) {
535 if (--timeout < 0) {
536 printk(KERN_ERR "init_pmu: no response from PMU\n");
537 return 0;
538 }
539 udelay(10);
540 pmu_poll();
541 }
542
543 /* ack all pending interrupts */
544 timeout = 100000;
545 interrupt_data[0][0] = 1;
546 while (interrupt_data[0][0] || pmu_state != idle) {
547 if (--timeout < 0) {
548 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
549 return 0;
550 }
551 if (pmu_state == idle)
552 adb_int_pending = 1;
553 via_pmu_interrupt(0, NULL, NULL);
554 udelay(10);
555 }
556
557 /* Tell PMU we are ready. */
558 if (pmu_kind == PMU_KEYLARGO_BASED) {
559 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
560 while (!req.complete)
561 pmu_poll();
562 }
563
564 /* Read PMU version */
565 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
566 pmu_wait_complete(&req);
567 if (req.reply_len > 0)
568 pmu_version = req.reply[0];
569
570 /* Read server mode setting */
571 if (pmu_kind == PMU_KEYLARGO_BASED) {
572 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
573 PMU_PWR_GET_POWERUP_EVENTS);
574 pmu_wait_complete(&req);
575 if (req.reply_len == 2) {
576 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
577 option_server_mode = 1;
578 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
579 option_server_mode ? "enabled" : "disabled");
580 }
581 }
582 return 1;
583 }
584
585 int
586 pmu_get_model(void)
587 {
588 return pmu_kind;
589 }
590
591 static void pmu_set_server_mode(int server_mode)
592 {
593 struct adb_request req;
594
595 if (pmu_kind != PMU_KEYLARGO_BASED)
596 return;
597
598 option_server_mode = server_mode;
599 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
600 pmu_wait_complete(&req);
601 if (req.reply_len < 2)
602 return;
603 if (server_mode)
604 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
605 PMU_PWR_SET_POWERUP_EVENTS,
606 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
607 else
608 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
609 PMU_PWR_CLR_POWERUP_EVENTS,
610 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
611 pmu_wait_complete(&req);
612 }
613
614 /* This new version of the code for 2400/3400/3500 powerbooks
615 * is inspired from the implementation in gkrellm-pmu
616 */
617 static void
618 done_battery_state_ohare(struct adb_request* req)
619 {
620 /* format:
621 * [0] : flags
622 * 0x01 : AC indicator
623 * 0x02 : charging
624 * 0x04 : battery exist
625 * 0x08 :
626 * 0x10 :
627 * 0x20 : full charged
628 * 0x40 : pcharge reset
629 * 0x80 : battery exist
630 *
631 * [1][2] : battery voltage
632 * [3] : CPU temperature
633 * [4] : battery temperature
634 * [5] : current
635 * [6][7] : pcharge
636 * --tkoba
637 */
638 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
639 long pcharge, charge, vb, vmax, lmax;
640 long vmax_charging, vmax_charged;
641 long amperage, voltage, time, max;
642 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
643 NULL, PMAC_MB_INFO_MODEL, 0);
644
645 if (req->reply[0] & 0x01)
646 pmu_power_flags |= PMU_PWR_AC_PRESENT;
647 else
648 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
649
650 if (mb == PMAC_TYPE_COMET) {
651 vmax_charged = 189;
652 vmax_charging = 213;
653 lmax = 6500;
654 } else {
655 vmax_charged = 330;
656 vmax_charging = 330;
657 lmax = 6500;
658 }
659 vmax = vmax_charged;
660
661 /* If battery installed */
662 if (req->reply[0] & 0x04) {
663 bat_flags |= PMU_BATT_PRESENT;
664 if (req->reply[0] & 0x02)
665 bat_flags |= PMU_BATT_CHARGING;
666 vb = (req->reply[1] << 8) | req->reply[2];
667 voltage = (vb * 265 + 72665) / 10;
668 amperage = req->reply[5];
669 if ((req->reply[0] & 0x01) == 0) {
670 if (amperage > 200)
671 vb += ((amperage - 200) * 15)/100;
672 } else if (req->reply[0] & 0x02) {
673 vb = (vb * 97) / 100;
674 vmax = vmax_charging;
675 }
676 charge = (100 * vb) / vmax;
677 if (req->reply[0] & 0x40) {
678 pcharge = (req->reply[6] << 8) + req->reply[7];
679 if (pcharge > lmax)
680 pcharge = lmax;
681 pcharge *= 100;
682 pcharge = 100 - pcharge / lmax;
683 if (pcharge < charge)
684 charge = pcharge;
685 }
686 if (amperage > 0)
687 time = (charge * 16440) / amperage;
688 else
689 time = 0;
690 max = 100;
691 amperage = -amperage;
692 } else
693 charge = max = amperage = voltage = time = 0;
694
695 pmu_batteries[pmu_cur_battery].flags = bat_flags;
696 pmu_batteries[pmu_cur_battery].charge = charge;
697 pmu_batteries[pmu_cur_battery].max_charge = max;
698 pmu_batteries[pmu_cur_battery].amperage = amperage;
699 pmu_batteries[pmu_cur_battery].voltage = voltage;
700 pmu_batteries[pmu_cur_battery].time_remaining = time;
701
702 clear_bit(0, &async_req_locks);
703 }
704
705 static void
706 done_battery_state_smart(struct adb_request* req)
707 {
708 /* format:
709 * [0] : format of this structure (known: 3,4,5)
710 * [1] : flags
711 *
712 * format 3 & 4:
713 *
714 * [2] : charge
715 * [3] : max charge
716 * [4] : current
717 * [5] : voltage
718 *
719 * format 5:
720 *
721 * [2][3] : charge
722 * [4][5] : max charge
723 * [6][7] : current
724 * [8][9] : voltage
725 */
726
727 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
728 int amperage;
729 unsigned int capa, max, voltage;
730
731 if (req->reply[1] & 0x01)
732 pmu_power_flags |= PMU_PWR_AC_PRESENT;
733 else
734 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
735
736
737 capa = max = amperage = voltage = 0;
738
739 if (req->reply[1] & 0x04) {
740 bat_flags |= PMU_BATT_PRESENT;
741 switch(req->reply[0]) {
742 case 3:
743 case 4: capa = req->reply[2];
744 max = req->reply[3];
745 amperage = *((signed char *)&req->reply[4]);
746 voltage = req->reply[5];
747 break;
748 case 5: capa = (req->reply[2] << 8) | req->reply[3];
749 max = (req->reply[4] << 8) | req->reply[5];
750 amperage = *((signed short *)&req->reply[6]);
751 voltage = (req->reply[8] << 8) | req->reply[9];
752 break;
753 default:
754 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
755 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
756 break;
757 }
758 }
759
760 if ((req->reply[1] & 0x01) && (amperage > 0))
761 bat_flags |= PMU_BATT_CHARGING;
762
763 pmu_batteries[pmu_cur_battery].flags = bat_flags;
764 pmu_batteries[pmu_cur_battery].charge = capa;
765 pmu_batteries[pmu_cur_battery].max_charge = max;
766 pmu_batteries[pmu_cur_battery].amperage = amperage;
767 pmu_batteries[pmu_cur_battery].voltage = voltage;
768 if (amperage) {
769 if ((req->reply[1] & 0x01) && (amperage > 0))
770 pmu_batteries[pmu_cur_battery].time_remaining
771 = ((max-capa) * 3600) / amperage;
772 else
773 pmu_batteries[pmu_cur_battery].time_remaining
774 = (capa * 3600) / (-amperage);
775 } else
776 pmu_batteries[pmu_cur_battery].time_remaining = 0;
777
778 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
779
780 clear_bit(0, &async_req_locks);
781 }
782
783 static void
784 query_battery_state(void)
785 {
786 if (test_and_set_bit(0, &async_req_locks))
787 return;
788 if (pmu_kind == PMU_OHARE_BASED)
789 pmu_request(&batt_req, done_battery_state_ohare,
790 1, PMU_BATTERY_STATE);
791 else
792 pmu_request(&batt_req, done_battery_state_smart,
793 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
794 }
795
796 static int
797 proc_get_info(char *page, char **start, off_t off,
798 int count, int *eof, void *data)
799 {
800 char* p = page;
801
802 p += sprintf(p, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
803 p += sprintf(p, "PMU firmware version : %02x\n", pmu_version);
804 p += sprintf(p, "AC Power : %d\n",
805 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
806 p += sprintf(p, "Battery count : %d\n", pmu_battery_count);
807
808 return p - page;
809 }
810
811 static int
812 proc_get_irqstats(char *page, char **start, off_t off,
813 int count, int *eof, void *data)
814 {
815 int i;
816 char* p = page;
817 static const char *irq_names[] = {
818 "Total CB1 triggered events",
819 "Total GPIO1 triggered events",
820 "PC-Card eject button",
821 "Sound/Brightness button",
822 "ADB message",
823 "Battery state change",
824 "Environment interrupt",
825 "Tick timer",
826 "Ghost interrupt (zero len)",
827 "Empty interrupt (empty mask)",
828 "Max irqs in a row"
829 };
830
831 for (i=0; i<11; i++) {
832 p += sprintf(p, " %2u: %10u (%s)\n",
833 i, pmu_irq_stats[i], irq_names[i]);
834 }
835 return p - page;
836 }
837
838 static int
839 proc_get_batt(char *page, char **start, off_t off,
840 int count, int *eof, void *data)
841 {
842 long batnum = (long)data;
843 char *p = page;
844
845 p += sprintf(p, "\n");
846 p += sprintf(p, "flags : %08x\n",
847 pmu_batteries[batnum].flags);
848 p += sprintf(p, "charge : %d\n",
849 pmu_batteries[batnum].charge);
850 p += sprintf(p, "max_charge : %d\n",
851 pmu_batteries[batnum].max_charge);
852 p += sprintf(p, "current : %d\n",
853 pmu_batteries[batnum].amperage);
854 p += sprintf(p, "voltage : %d\n",
855 pmu_batteries[batnum].voltage);
856 p += sprintf(p, "time rem. : %d\n",
857 pmu_batteries[batnum].time_remaining);
858
859 return p - page;
860 }
861
862 static int
863 proc_read_options(char *page, char **start, off_t off,
864 int count, int *eof, void *data)
865 {
866 char *p = page;
867
868 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
869 if (pmu_kind == PMU_KEYLARGO_BASED &&
870 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
871 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
872 #endif
873 if (pmu_kind == PMU_KEYLARGO_BASED)
874 p += sprintf(p, "server_mode=%d\n", option_server_mode);
875
876 return p - page;
877 }
878
879 static int
880 proc_write_options(struct file *file, const char __user *buffer,
881 unsigned long count, void *data)
882 {
883 char tmp[33];
884 char *label, *val;
885 unsigned long fcount = count;
886
887 if (!count)
888 return -EINVAL;
889 if (count > 32)
890 count = 32;
891 if (copy_from_user(tmp, buffer, count))
892 return -EFAULT;
893 tmp[count] = 0;
894
895 label = tmp;
896 while(*label == ' ')
897 label++;
898 val = label;
899 while(*val && (*val != '=')) {
900 if (*val == ' ')
901 *val = 0;
902 val++;
903 }
904 if ((*val) == 0)
905 return -EINVAL;
906 *(val++) = 0;
907 while(*val == ' ')
908 val++;
909 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
910 if (pmu_kind == PMU_KEYLARGO_BASED &&
911 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
912 if (!strcmp(label, "lid_wakeup"))
913 option_lid_wakeup = ((*val) == '1');
914 #endif
915 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
916 int new_value;
917 new_value = ((*val) == '1');
918 if (new_value != option_server_mode)
919 pmu_set_server_mode(new_value);
920 }
921 return fcount;
922 }
923
924 #ifdef CONFIG_ADB
925 /* Send an ADB command */
926 static int
927 pmu_send_request(struct adb_request *req, int sync)
928 {
929 int i, ret;
930
931 if ((vias == NULL) || (!pmu_fully_inited)) {
932 req->complete = 1;
933 return -ENXIO;
934 }
935
936 ret = -EINVAL;
937
938 switch (req->data[0]) {
939 case PMU_PACKET:
940 for (i = 0; i < req->nbytes - 1; ++i)
941 req->data[i] = req->data[i+1];
942 --req->nbytes;
943 if (pmu_data_len[req->data[0]][1] != 0) {
944 req->reply[0] = ADB_RET_OK;
945 req->reply_len = 1;
946 } else
947 req->reply_len = 0;
948 ret = pmu_queue_request(req);
949 break;
950 case CUDA_PACKET:
951 switch (req->data[1]) {
952 case CUDA_GET_TIME:
953 if (req->nbytes != 2)
954 break;
955 req->data[0] = PMU_READ_RTC;
956 req->nbytes = 1;
957 req->reply_len = 3;
958 req->reply[0] = CUDA_PACKET;
959 req->reply[1] = 0;
960 req->reply[2] = CUDA_GET_TIME;
961 ret = pmu_queue_request(req);
962 break;
963 case CUDA_SET_TIME:
964 if (req->nbytes != 6)
965 break;
966 req->data[0] = PMU_SET_RTC;
967 req->nbytes = 5;
968 for (i = 1; i <= 4; ++i)
969 req->data[i] = req->data[i+1];
970 req->reply_len = 3;
971 req->reply[0] = CUDA_PACKET;
972 req->reply[1] = 0;
973 req->reply[2] = CUDA_SET_TIME;
974 ret = pmu_queue_request(req);
975 break;
976 }
977 break;
978 case ADB_PACKET:
979 if (!pmu_has_adb)
980 return -ENXIO;
981 for (i = req->nbytes - 1; i > 1; --i)
982 req->data[i+2] = req->data[i];
983 req->data[3] = req->nbytes - 2;
984 req->data[2] = pmu_adb_flags;
985 /*req->data[1] = req->data[1];*/
986 req->data[0] = PMU_ADB_CMD;
987 req->nbytes += 2;
988 req->reply_expected = 1;
989 req->reply_len = 0;
990 ret = pmu_queue_request(req);
991 break;
992 }
993 if (ret) {
994 req->complete = 1;
995 return ret;
996 }
997
998 if (sync)
999 while (!req->complete)
1000 pmu_poll();
1001
1002 return 0;
1003 }
1004
1005 /* Enable/disable autopolling */
1006 static int
1007 pmu_adb_autopoll(int devs)
1008 {
1009 struct adb_request req;
1010
1011 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1012 return -ENXIO;
1013
1014 if (devs) {
1015 adb_dev_map = devs;
1016 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1017 adb_dev_map >> 8, adb_dev_map);
1018 pmu_adb_flags = 2;
1019 } else {
1020 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1021 pmu_adb_flags = 0;
1022 }
1023 while (!req.complete)
1024 pmu_poll();
1025 return 0;
1026 }
1027
1028 /* Reset the ADB bus */
1029 static int
1030 pmu_adb_reset_bus(void)
1031 {
1032 struct adb_request req;
1033 int save_autopoll = adb_dev_map;
1034
1035 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1036 return -ENXIO;
1037
1038 /* anyone got a better idea?? */
1039 pmu_adb_autopoll(0);
1040
1041 req.nbytes = 5;
1042 req.done = NULL;
1043 req.data[0] = PMU_ADB_CMD;
1044 req.data[1] = 0;
1045 req.data[2] = ADB_BUSRESET;
1046 req.data[3] = 0;
1047 req.data[4] = 0;
1048 req.reply_len = 0;
1049 req.reply_expected = 1;
1050 if (pmu_queue_request(&req) != 0) {
1051 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1052 return -EIO;
1053 }
1054 pmu_wait_complete(&req);
1055
1056 if (save_autopoll != 0)
1057 pmu_adb_autopoll(save_autopoll);
1058
1059 return 0;
1060 }
1061 #endif /* CONFIG_ADB */
1062
1063 /* Construct and send a pmu request */
1064 int
1065 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1066 int nbytes, ...)
1067 {
1068 va_list list;
1069 int i;
1070
1071 if (vias == NULL)
1072 return -ENXIO;
1073
1074 if (nbytes < 0 || nbytes > 32) {
1075 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1076 req->complete = 1;
1077 return -EINVAL;
1078 }
1079 req->nbytes = nbytes;
1080 req->done = done;
1081 va_start(list, nbytes);
1082 for (i = 0; i < nbytes; ++i)
1083 req->data[i] = va_arg(list, int);
1084 va_end(list);
1085 req->reply_len = 0;
1086 req->reply_expected = 0;
1087 return pmu_queue_request(req);
1088 }
1089
1090 int
1091 pmu_queue_request(struct adb_request *req)
1092 {
1093 unsigned long flags;
1094 int nsend;
1095
1096 if (via == NULL) {
1097 req->complete = 1;
1098 return -ENXIO;
1099 }
1100 if (req->nbytes <= 0) {
1101 req->complete = 1;
1102 return 0;
1103 }
1104 nsend = pmu_data_len[req->data[0]][0];
1105 if (nsend >= 0 && req->nbytes != nsend + 1) {
1106 req->complete = 1;
1107 return -EINVAL;
1108 }
1109
1110 req->next = NULL;
1111 req->sent = 0;
1112 req->complete = 0;
1113
1114 spin_lock_irqsave(&pmu_lock, flags);
1115 if (current_req != 0) {
1116 last_req->next = req;
1117 last_req = req;
1118 } else {
1119 current_req = req;
1120 last_req = req;
1121 if (pmu_state == idle)
1122 pmu_start();
1123 }
1124 spin_unlock_irqrestore(&pmu_lock, flags);
1125
1126 return 0;
1127 }
1128
1129 static inline void
1130 wait_for_ack(void)
1131 {
1132 /* Sightly increased the delay, I had one occurrence of the message
1133 * reported
1134 */
1135 int timeout = 4000;
1136 while ((in_8(&via[B]) & TACK) == 0) {
1137 if (--timeout < 0) {
1138 printk(KERN_ERR "PMU not responding (!ack)\n");
1139 return;
1140 }
1141 udelay(10);
1142 }
1143 }
1144
1145 /* New PMU seems to be very sensitive to those timings, so we make sure
1146 * PCI is flushed immediately */
1147 static inline void
1148 send_byte(int x)
1149 {
1150 volatile unsigned char __iomem *v = via;
1151
1152 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1153 out_8(&v[SR], x);
1154 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
1155 (void)in_8(&v[B]);
1156 }
1157
1158 static inline void
1159 recv_byte(void)
1160 {
1161 volatile unsigned char __iomem *v = via;
1162
1163 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1164 in_8(&v[SR]); /* resets SR */
1165 out_8(&v[B], in_8(&v[B]) & ~TREQ);
1166 (void)in_8(&v[B]);
1167 }
1168
1169 static inline void
1170 pmu_done(struct adb_request *req)
1171 {
1172 void (*done)(struct adb_request *) = req->done;
1173 mb();
1174 req->complete = 1;
1175 /* Here, we assume that if the request has a done member, the
1176 * struct request will survive to setting req->complete to 1
1177 */
1178 if (done)
1179 (*done)(req);
1180 }
1181
1182 static void
1183 pmu_start(void)
1184 {
1185 struct adb_request *req;
1186
1187 /* assert pmu_state == idle */
1188 /* get the packet to send */
1189 req = current_req;
1190 if (req == 0 || pmu_state != idle
1191 || (/*req->reply_expected && */req_awaiting_reply))
1192 return;
1193
1194 pmu_state = sending;
1195 data_index = 1;
1196 data_len = pmu_data_len[req->data[0]][0];
1197
1198 /* Sounds safer to make sure ACK is high before writing. This helped
1199 * kill a problem with ADB and some iBooks
1200 */
1201 wait_for_ack();
1202 /* set the shift register to shift out and send a byte */
1203 send_byte(req->data[0]);
1204 }
1205
1206 void
1207 pmu_poll(void)
1208 {
1209 if (!via)
1210 return;
1211 if (disable_poll)
1212 return;
1213 via_pmu_interrupt(0, NULL, NULL);
1214 }
1215
1216 void
1217 pmu_poll_adb(void)
1218 {
1219 if (!via)
1220 return;
1221 if (disable_poll)
1222 return;
1223 /* Kicks ADB read when PMU is suspended */
1224 adb_int_pending = 1;
1225 do {
1226 via_pmu_interrupt(0, NULL, NULL);
1227 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1228 || req_awaiting_reply));
1229 }
1230
1231 void
1232 pmu_wait_complete(struct adb_request *req)
1233 {
1234 if (!via)
1235 return;
1236 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1237 via_pmu_interrupt(0, NULL, NULL);
1238 }
1239
1240 /* This function loops until the PMU is idle and prevents it from
1241 * anwsering to ADB interrupts. pmu_request can still be called.
1242 * This is done to avoid spurrious shutdowns when we know we'll have
1243 * interrupts switched off for a long time
1244 */
1245 void
1246 pmu_suspend(void)
1247 {
1248 unsigned long flags;
1249 #ifdef SUSPEND_USES_PMU
1250 struct adb_request *req;
1251 #endif
1252 if (!via)
1253 return;
1254
1255 spin_lock_irqsave(&pmu_lock, flags);
1256 pmu_suspended++;
1257 if (pmu_suspended > 1) {
1258 spin_unlock_irqrestore(&pmu_lock, flags);
1259 return;
1260 }
1261
1262 do {
1263 spin_unlock_irqrestore(&pmu_lock, flags);
1264 if (req_awaiting_reply)
1265 adb_int_pending = 1;
1266 via_pmu_interrupt(0, NULL, NULL);
1267 spin_lock_irqsave(&pmu_lock, flags);
1268 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1269 #ifdef SUSPEND_USES_PMU
1270 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1271 spin_unlock_irqrestore(&pmu_lock, flags);
1272 while(!req.complete)
1273 pmu_poll();
1274 #else /* SUSPEND_USES_PMU */
1275 if (gpio_irq >= 0)
1276 disable_irq_nosync(gpio_irq);
1277 out_8(&via[IER], CB1_INT | IER_CLR);
1278 spin_unlock_irqrestore(&pmu_lock, flags);
1279 #endif /* SUSPEND_USES_PMU */
1280 break;
1281 }
1282 } while (1);
1283 }
1284
1285 void
1286 pmu_resume(void)
1287 {
1288 unsigned long flags;
1289
1290 if (!via || (pmu_suspended < 1))
1291 return;
1292
1293 spin_lock_irqsave(&pmu_lock, flags);
1294 pmu_suspended--;
1295 if (pmu_suspended > 0) {
1296 spin_unlock_irqrestore(&pmu_lock, flags);
1297 return;
1298 }
1299 adb_int_pending = 1;
1300 #ifdef SUSPEND_USES_PMU
1301 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1302 spin_unlock_irqrestore(&pmu_lock, flags);
1303 while(!req.complete)
1304 pmu_poll();
1305 #else /* SUSPEND_USES_PMU */
1306 if (gpio_irq >= 0)
1307 enable_irq(gpio_irq);
1308 out_8(&via[IER], CB1_INT | IER_SET);
1309 spin_unlock_irqrestore(&pmu_lock, flags);
1310 pmu_poll();
1311 #endif /* SUSPEND_USES_PMU */
1312 }
1313
1314 /* Interrupt data could be the result data from an ADB cmd */
1315 static void
1316 pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs)
1317 {
1318 unsigned char ints, pirq;
1319 int i = 0;
1320
1321 asleep = 0;
1322 if (drop_interrupts || len < 1) {
1323 adb_int_pending = 0;
1324 pmu_irq_stats[8]++;
1325 return;
1326 }
1327
1328 /* Get PMU interrupt mask */
1329 ints = data[0];
1330
1331 /* Record zero interrupts for stats */
1332 if (ints == 0)
1333 pmu_irq_stats[9]++;
1334
1335 /* Hack to deal with ADB autopoll flag */
1336 if (ints & PMU_INT_ADB)
1337 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1338
1339 next:
1340
1341 if (ints == 0) {
1342 if (i > pmu_irq_stats[10])
1343 pmu_irq_stats[10] = i;
1344 return;
1345 }
1346
1347 for (pirq = 0; pirq < 8; pirq++)
1348 if (ints & (1 << pirq))
1349 break;
1350 pmu_irq_stats[pirq]++;
1351 i++;
1352 ints &= ~(1 << pirq);
1353
1354 /* Note: for some reason, we get an interrupt with len=1,
1355 * data[0]==0 after each normal ADB interrupt, at least
1356 * on the Pismo. Still investigating... --BenH
1357 */
1358 if ((1 << pirq) & PMU_INT_ADB) {
1359 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1360 struct adb_request *req = req_awaiting_reply;
1361 if (req == 0) {
1362 printk(KERN_ERR "PMU: extra ADB reply\n");
1363 return;
1364 }
1365 req_awaiting_reply = NULL;
1366 if (len <= 2)
1367 req->reply_len = 0;
1368 else {
1369 memcpy(req->reply, data + 1, len - 1);
1370 req->reply_len = len - 1;
1371 }
1372 pmu_done(req);
1373 } else {
1374 if (len == 4 && data[1] == 0x2c) {
1375 extern int xmon_wants_key, xmon_adb_keycode;
1376 if (xmon_wants_key) {
1377 xmon_adb_keycode = data[2];
1378 return;
1379 }
1380 }
1381 #ifdef CONFIG_ADB
1382 /*
1383 * XXX On the [23]400 the PMU gives us an up
1384 * event for keycodes 0x74 or 0x75 when the PC
1385 * card eject buttons are released, so we
1386 * ignore those events.
1387 */
1388 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1389 && data[1] == 0x2c && data[3] == 0xff
1390 && (data[2] & ~1) == 0xf4))
1391 adb_input(data+1, len-1, regs, 1);
1392 #endif /* CONFIG_ADB */
1393 }
1394 }
1395 /* Sound/brightness button pressed */
1396 else if ((1 << pirq) & PMU_INT_SNDBRT) {
1397 #ifdef CONFIG_PMAC_BACKLIGHT
1398 if (len == 3)
1399 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1400 #endif
1401 }
1402 /* Tick interrupt */
1403 else if ((1 << pirq) & PMU_INT_TICK) {
1404 /* Environement or tick interrupt, query batteries */
1405 if (pmu_battery_count) {
1406 if ((--query_batt_timer) == 0) {
1407 query_battery_state();
1408 query_batt_timer = BATTERY_POLLING_COUNT;
1409 }
1410 }
1411 }
1412 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1413 if (pmu_battery_count)
1414 query_battery_state();
1415 pmu_pass_intr(data, len);
1416 /* len == 6 is probably a bad check. But how do I
1417 * know what PMU versions send what events here? */
1418 if (len == 6) {
1419 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1420 via_pmu_event(PMU_EVT_LID, data[1]&1);
1421 }
1422 } else {
1423 pmu_pass_intr(data, len);
1424 }
1425 goto next;
1426 }
1427
1428 static struct adb_request*
1429 pmu_sr_intr(struct pt_regs *regs)
1430 {
1431 struct adb_request *req;
1432 int bite = 0;
1433
1434 if (via[B] & TREQ) {
1435 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1436 out_8(&via[IFR], SR_INT);
1437 return NULL;
1438 }
1439 /* The ack may not yet be low when we get the interrupt */
1440 while ((in_8(&via[B]) & TACK) != 0)
1441 ;
1442
1443 /* if reading grab the byte, and reset the interrupt */
1444 if (pmu_state == reading || pmu_state == reading_intr)
1445 bite = in_8(&via[SR]);
1446
1447 /* reset TREQ and wait for TACK to go high */
1448 out_8(&via[B], in_8(&via[B]) | TREQ);
1449 wait_for_ack();
1450
1451 switch (pmu_state) {
1452 case sending:
1453 req = current_req;
1454 if (data_len < 0) {
1455 data_len = req->nbytes - 1;
1456 send_byte(data_len);
1457 break;
1458 }
1459 if (data_index <= data_len) {
1460 send_byte(req->data[data_index++]);
1461 break;
1462 }
1463 req->sent = 1;
1464 data_len = pmu_data_len[req->data[0]][1];
1465 if (data_len == 0) {
1466 pmu_state = idle;
1467 current_req = req->next;
1468 if (req->reply_expected)
1469 req_awaiting_reply = req;
1470 else
1471 return req;
1472 } else {
1473 pmu_state = reading;
1474 data_index = 0;
1475 reply_ptr = req->reply + req->reply_len;
1476 recv_byte();
1477 }
1478 break;
1479
1480 case intack:
1481 data_index = 0;
1482 data_len = -1;
1483 pmu_state = reading_intr;
1484 reply_ptr = interrupt_data[int_data_last];
1485 recv_byte();
1486 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1487 enable_irq(gpio_irq);
1488 gpio_irq_enabled = 1;
1489 }
1490 break;
1491
1492 case reading:
1493 case reading_intr:
1494 if (data_len == -1) {
1495 data_len = bite;
1496 if (bite > 32)
1497 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1498 } else if (data_index < 32) {
1499 reply_ptr[data_index++] = bite;
1500 }
1501 if (data_index < data_len) {
1502 recv_byte();
1503 break;
1504 }
1505
1506 if (pmu_state == reading_intr) {
1507 pmu_state = idle;
1508 int_data_state[int_data_last] = int_data_ready;
1509 interrupt_data_len[int_data_last] = data_len;
1510 } else {
1511 req = current_req;
1512 /*
1513 * For PMU sleep and freq change requests, we lock the
1514 * PMU until it's explicitely unlocked. This avoids any
1515 * spurrious event polling getting in
1516 */
1517 current_req = req->next;
1518 req->reply_len += data_index;
1519 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1520 pmu_state = locked;
1521 else
1522 pmu_state = idle;
1523 return req;
1524 }
1525 break;
1526
1527 default:
1528 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1529 pmu_state);
1530 }
1531 return NULL;
1532 }
1533
1534 static irqreturn_t
1535 via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs)
1536 {
1537 unsigned long flags;
1538 int intr;
1539 int nloop = 0;
1540 int int_data = -1;
1541 struct adb_request *req = NULL;
1542 int handled = 0;
1543
1544 /* This is a bit brutal, we can probably do better */
1545 spin_lock_irqsave(&pmu_lock, flags);
1546 ++disable_poll;
1547
1548 for (;;) {
1549 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1550 if (intr == 0)
1551 break;
1552 handled = 1;
1553 if (++nloop > 1000) {
1554 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1555 "intr=%x, ier=%x pmu_state=%d\n",
1556 intr, in_8(&via[IER]), pmu_state);
1557 break;
1558 }
1559 out_8(&via[IFR], intr);
1560 if (intr & CB1_INT) {
1561 adb_int_pending = 1;
1562 pmu_irq_stats[0]++;
1563 }
1564 if (intr & SR_INT) {
1565 req = pmu_sr_intr(regs);
1566 if (req)
1567 break;
1568 }
1569 }
1570
1571 recheck:
1572 if (pmu_state == idle) {
1573 if (adb_int_pending) {
1574 if (int_data_state[0] == int_data_empty)
1575 int_data_last = 0;
1576 else if (int_data_state[1] == int_data_empty)
1577 int_data_last = 1;
1578 else
1579 goto no_free_slot;
1580 pmu_state = intack;
1581 int_data_state[int_data_last] = int_data_fill;
1582 /* Sounds safer to make sure ACK is high before writing.
1583 * This helped kill a problem with ADB and some iBooks
1584 */
1585 wait_for_ack();
1586 send_byte(PMU_INT_ACK);
1587 adb_int_pending = 0;
1588 } else if (current_req)
1589 pmu_start();
1590 }
1591 no_free_slot:
1592 /* Mark the oldest buffer for flushing */
1593 if (int_data_state[!int_data_last] == int_data_ready) {
1594 int_data_state[!int_data_last] = int_data_flush;
1595 int_data = !int_data_last;
1596 } else if (int_data_state[int_data_last] == int_data_ready) {
1597 int_data_state[int_data_last] = int_data_flush;
1598 int_data = int_data_last;
1599 }
1600 --disable_poll;
1601 spin_unlock_irqrestore(&pmu_lock, flags);
1602
1603 /* Deal with completed PMU requests outside of the lock */
1604 if (req) {
1605 pmu_done(req);
1606 req = NULL;
1607 }
1608
1609 /* Deal with interrupt datas outside of the lock */
1610 if (int_data >= 0) {
1611 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs);
1612 spin_lock_irqsave(&pmu_lock, flags);
1613 ++disable_poll;
1614 int_data_state[int_data] = int_data_empty;
1615 int_data = -1;
1616 goto recheck;
1617 }
1618
1619 return IRQ_RETVAL(handled);
1620 }
1621
1622 void
1623 pmu_unlock(void)
1624 {
1625 unsigned long flags;
1626
1627 spin_lock_irqsave(&pmu_lock, flags);
1628 if (pmu_state == locked)
1629 pmu_state = idle;
1630 adb_int_pending = 1;
1631 spin_unlock_irqrestore(&pmu_lock, flags);
1632 }
1633
1634
1635 static irqreturn_t
1636 gpio1_interrupt(int irq, void *arg, struct pt_regs *regs)
1637 {
1638 unsigned long flags;
1639
1640 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1641 spin_lock_irqsave(&pmu_lock, flags);
1642 if (gpio_irq_enabled > 0) {
1643 disable_irq_nosync(gpio_irq);
1644 gpio_irq_enabled = 0;
1645 }
1646 pmu_irq_stats[1]++;
1647 adb_int_pending = 1;
1648 spin_unlock_irqrestore(&pmu_lock, flags);
1649 via_pmu_interrupt(0, NULL, NULL);
1650 return IRQ_HANDLED;
1651 }
1652 return IRQ_NONE;
1653 }
1654
1655 void
1656 pmu_enable_irled(int on)
1657 {
1658 struct adb_request req;
1659
1660 if (vias == NULL)
1661 return ;
1662 if (pmu_kind == PMU_KEYLARGO_BASED)
1663 return ;
1664
1665 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1666 (on ? PMU_POW_ON : PMU_POW_OFF));
1667 pmu_wait_complete(&req);
1668 }
1669
1670 void
1671 pmu_restart(void)
1672 {
1673 struct adb_request req;
1674
1675 if (via == NULL)
1676 return;
1677
1678 local_irq_disable();
1679
1680 drop_interrupts = 1;
1681
1682 if (pmu_kind != PMU_KEYLARGO_BASED) {
1683 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1684 PMU_INT_TICK );
1685 while(!req.complete)
1686 pmu_poll();
1687 }
1688
1689 pmu_request(&req, NULL, 1, PMU_RESET);
1690 pmu_wait_complete(&req);
1691 for (;;)
1692 ;
1693 }
1694
1695 void
1696 pmu_shutdown(void)
1697 {
1698 struct adb_request req;
1699
1700 if (via == NULL)
1701 return;
1702
1703 local_irq_disable();
1704
1705 drop_interrupts = 1;
1706
1707 if (pmu_kind != PMU_KEYLARGO_BASED) {
1708 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1709 PMU_INT_TICK );
1710 pmu_wait_complete(&req);
1711 } else {
1712 /* Disable server mode on shutdown or we'll just
1713 * wake up again
1714 */
1715 pmu_set_server_mode(0);
1716 }
1717
1718 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1719 'M', 'A', 'T', 'T');
1720 pmu_wait_complete(&req);
1721 for (;;)
1722 ;
1723 }
1724
1725 int
1726 pmu_present(void)
1727 {
1728 return via != 0;
1729 }
1730
1731 #ifdef CONFIG_PM
1732
1733 static LIST_HEAD(sleep_notifiers);
1734
1735 int
1736 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
1737 {
1738 struct list_head *list;
1739 struct pmu_sleep_notifier *notifier;
1740
1741 for (list = sleep_notifiers.next; list != &sleep_notifiers;
1742 list = list->next) {
1743 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1744 if (n->priority > notifier->priority)
1745 break;
1746 }
1747 __list_add(&n->list, list->prev, list);
1748 return 0;
1749 }
1750 EXPORT_SYMBOL(pmu_register_sleep_notifier);
1751
1752 int
1753 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
1754 {
1755 if (n->list.next == 0)
1756 return -ENOENT;
1757 list_del(&n->list);
1758 n->list.next = NULL;
1759 return 0;
1760 }
1761 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
1762 #endif /* CONFIG_PM */
1763
1764 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1765
1766 /* Sleep is broadcast last-to-first */
1767 static int
1768 broadcast_sleep(int when, int fallback)
1769 {
1770 int ret = PBOOK_SLEEP_OK;
1771 struct list_head *list;
1772 struct pmu_sleep_notifier *notifier;
1773
1774 for (list = sleep_notifiers.prev; list != &sleep_notifiers;
1775 list = list->prev) {
1776 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1777 ret = notifier->notifier_call(notifier, when);
1778 if (ret != PBOOK_SLEEP_OK) {
1779 printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
1780 when, notifier, notifier->notifier_call);
1781 for (; list != &sleep_notifiers; list = list->next) {
1782 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1783 notifier->notifier_call(notifier, fallback);
1784 }
1785 return ret;
1786 }
1787 }
1788 return ret;
1789 }
1790
1791 /* Wake is broadcast first-to-last */
1792 static int
1793 broadcast_wake(void)
1794 {
1795 int ret = PBOOK_SLEEP_OK;
1796 struct list_head *list;
1797 struct pmu_sleep_notifier *notifier;
1798
1799 for (list = sleep_notifiers.next; list != &sleep_notifiers;
1800 list = list->next) {
1801 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1802 notifier->notifier_call(notifier, PBOOK_WAKE);
1803 }
1804 return ret;
1805 }
1806
1807 /*
1808 * This struct is used to store config register values for
1809 * PCI devices which may get powered off when we sleep.
1810 */
1811 static struct pci_save {
1812 #ifndef HACKED_PCI_SAVE
1813 u16 command;
1814 u16 cache_lat;
1815 u16 intr;
1816 u32 rom_address;
1817 #else
1818 u32 config[16];
1819 #endif
1820 } *pbook_pci_saves;
1821 static int pbook_npci_saves;
1822
1823 static void
1824 pbook_alloc_pci_save(void)
1825 {
1826 int npci;
1827 struct pci_dev *pd = NULL;
1828
1829 npci = 0;
1830 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1831 ++npci;
1832 }
1833 if (npci == 0)
1834 return;
1835 pbook_pci_saves = (struct pci_save *)
1836 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
1837 pbook_npci_saves = npci;
1838 }
1839
1840 static void
1841 pbook_free_pci_save(void)
1842 {
1843 if (pbook_pci_saves == NULL)
1844 return;
1845 kfree(pbook_pci_saves);
1846 pbook_pci_saves = NULL;
1847 pbook_npci_saves = 0;
1848 }
1849
1850 static void
1851 pbook_pci_save(void)
1852 {
1853 struct pci_save *ps = pbook_pci_saves;
1854 struct pci_dev *pd = NULL;
1855 int npci = pbook_npci_saves;
1856
1857 if (ps == NULL)
1858 return;
1859
1860 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1861 if (npci-- == 0)
1862 return;
1863 #ifndef HACKED_PCI_SAVE
1864 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
1865 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
1866 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
1867 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
1868 #else
1869 int i;
1870 for (i=1;i<16;i++)
1871 pci_read_config_dword(pd, i<<4, &ps->config[i]);
1872 #endif
1873 ++ps;
1874 }
1875 }
1876
1877 /* For this to work, we must take care of a few things: If gmac was enabled
1878 * during boot, it will be in the pci dev list. If it's disabled at this point
1879 * (and it will probably be), then you can't access it's config space.
1880 */
1881 static void
1882 pbook_pci_restore(void)
1883 {
1884 u16 cmd;
1885 struct pci_save *ps = pbook_pci_saves - 1;
1886 struct pci_dev *pd = NULL;
1887 int npci = pbook_npci_saves;
1888 int j;
1889
1890 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1891 #ifdef HACKED_PCI_SAVE
1892 int i;
1893 if (npci-- == 0)
1894 return;
1895 ps++;
1896 for (i=2;i<16;i++)
1897 pci_write_config_dword(pd, i<<4, ps->config[i]);
1898 pci_write_config_dword(pd, 4, ps->config[1]);
1899 #else
1900 if (npci-- == 0)
1901 return;
1902 ps++;
1903 if (ps->command == 0)
1904 continue;
1905 pci_read_config_word(pd, PCI_COMMAND, &cmd);
1906 if ((ps->command & ~cmd) == 0)
1907 continue;
1908 switch (pd->hdr_type) {
1909 case PCI_HEADER_TYPE_NORMAL:
1910 for (j = 0; j < 6; ++j)
1911 pci_write_config_dword(pd,
1912 PCI_BASE_ADDRESS_0 + j*4,
1913 pd->resource[j].start);
1914 pci_write_config_dword(pd, PCI_ROM_ADDRESS,
1915 ps->rom_address);
1916 pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
1917 ps->cache_lat);
1918 pci_write_config_word(pd, PCI_INTERRUPT_LINE,
1919 ps->intr);
1920 pci_write_config_word(pd, PCI_COMMAND, ps->command);
1921 break;
1922 }
1923 #endif
1924 }
1925 }
1926
1927 #ifdef DEBUG_SLEEP
1928 /* N.B. This doesn't work on the 3400 */
1929 void
1930 pmu_blink(int n)
1931 {
1932 struct adb_request req;
1933
1934 memset(&req, 0, sizeof(req));
1935
1936 for (; n > 0; --n) {
1937 req.nbytes = 4;
1938 req.done = NULL;
1939 req.data[0] = 0xee;
1940 req.data[1] = 4;
1941 req.data[2] = 0;
1942 req.data[3] = 1;
1943 req.reply[0] = ADB_RET_OK;
1944 req.reply_len = 1;
1945 req.reply_expected = 0;
1946 pmu_polled_request(&req);
1947 mdelay(50);
1948 req.nbytes = 4;
1949 req.done = NULL;
1950 req.data[0] = 0xee;
1951 req.data[1] = 4;
1952 req.data[2] = 0;
1953 req.data[3] = 0;
1954 req.reply[0] = ADB_RET_OK;
1955 req.reply_len = 1;
1956 req.reply_expected = 0;
1957 pmu_polled_request(&req);
1958 mdelay(50);
1959 }
1960 mdelay(50);
1961 }
1962 #endif
1963
1964 /*
1965 * Put the powerbook to sleep.
1966 */
1967
1968 static u32 save_via[8];
1969
1970 static void
1971 save_via_state(void)
1972 {
1973 save_via[0] = in_8(&via[ANH]);
1974 save_via[1] = in_8(&via[DIRA]);
1975 save_via[2] = in_8(&via[B]);
1976 save_via[3] = in_8(&via[DIRB]);
1977 save_via[4] = in_8(&via[PCR]);
1978 save_via[5] = in_8(&via[ACR]);
1979 save_via[6] = in_8(&via[T1CL]);
1980 save_via[7] = in_8(&via[T1CH]);
1981 }
1982 static void
1983 restore_via_state(void)
1984 {
1985 out_8(&via[ANH], save_via[0]);
1986 out_8(&via[DIRA], save_via[1]);
1987 out_8(&via[B], save_via[2]);
1988 out_8(&via[DIRB], save_via[3]);
1989 out_8(&via[PCR], save_via[4]);
1990 out_8(&via[ACR], save_via[5]);
1991 out_8(&via[T1CL], save_via[6]);
1992 out_8(&via[T1CH], save_via[7]);
1993 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
1994 out_8(&via[IFR], 0x7f); /* clear IFR */
1995 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1996 }
1997
1998 static int
1999 pmac_suspend_devices(void)
2000 {
2001 int ret;
2002
2003 pm_prepare_console();
2004
2005 /* Notify old-style device drivers & userland */
2006 ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
2007 if (ret != PBOOK_SLEEP_OK) {
2008 printk(KERN_ERR "Sleep rejected by drivers\n");
2009 return -EBUSY;
2010 }
2011
2012 /* Sync the disks. */
2013 /* XXX It would be nice to have some way to ensure that
2014 * nobody is dirtying any new buffers while we wait. That
2015 * could be achieved using the refrigerator for processes
2016 * that swsusp uses
2017 */
2018 sys_sync();
2019
2020 /* Sleep can fail now. May not be very robust but useful for debugging */
2021 ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
2022 if (ret != PBOOK_SLEEP_OK) {
2023 printk(KERN_ERR "Driver sleep failed\n");
2024 return -EBUSY;
2025 }
2026
2027 /* Send suspend call to devices, hold the device core's dpm_sem */
2028 ret = device_suspend(PMSG_SUSPEND);
2029 if (ret) {
2030 broadcast_wake();
2031 printk(KERN_ERR "Driver sleep failed\n");
2032 return -EBUSY;
2033 }
2034
2035 /* Call platform functions marked "on sleep" */
2036 pmac_pfunc_i2c_suspend();
2037 pmac_pfunc_base_suspend();
2038
2039 /* Stop preemption */
2040 preempt_disable();
2041
2042 /* Make sure the decrementer won't interrupt us */
2043 asm volatile("mtdec %0" : : "r" (0x7fffffff));
2044 /* Make sure any pending DEC interrupt occurring while we did
2045 * the above didn't re-enable the DEC */
2046 mb();
2047 asm volatile("mtdec %0" : : "r" (0x7fffffff));
2048
2049 /* We can now disable MSR_EE. This code of course works properly only
2050 * on UP machines... For SMP, if we ever implement sleep, we'll have to
2051 * stop the "other" CPUs way before we do all that stuff.
2052 */
2053 local_irq_disable();
2054
2055 /* Broadcast power down irq
2056 * This isn't that useful in most cases (only directly wired devices can
2057 * use this but still... This will take care of sysdev's as well, so
2058 * we exit from here with local irqs disabled and PIC off.
2059 */
2060 ret = device_power_down(PMSG_SUSPEND);
2061 if (ret) {
2062 wakeup_decrementer();
2063 local_irq_enable();
2064 preempt_enable();
2065 device_resume();
2066 broadcast_wake();
2067 printk(KERN_ERR "Driver powerdown failed\n");
2068 return -EBUSY;
2069 }
2070
2071 /* Wait for completion of async requests */
2072 while (!batt_req.complete)
2073 pmu_poll();
2074
2075 /* Giveup the lazy FPU & vec so we don't have to back them
2076 * up from the low level code
2077 */
2078 enable_kernel_fp();
2079
2080 #ifdef CONFIG_ALTIVEC
2081 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2082 enable_kernel_altivec();
2083 #endif /* CONFIG_ALTIVEC */
2084
2085 return 0;
2086 }
2087
2088 static int
2089 pmac_wakeup_devices(void)
2090 {
2091 mdelay(100);
2092
2093 /* Power back up system devices (including the PIC) */
2094 device_power_up();
2095
2096 /* Force a poll of ADB interrupts */
2097 adb_int_pending = 1;
2098 via_pmu_interrupt(0, NULL, NULL);
2099
2100 /* Restart jiffies & scheduling */
2101 wakeup_decrementer();
2102
2103 /* Re-enable local CPU interrupts */
2104 local_irq_enable();
2105 mdelay(10);
2106 preempt_enable();
2107
2108 /* Call platform functions marked "on wake" */
2109 pmac_pfunc_base_resume();
2110 pmac_pfunc_i2c_resume();
2111
2112 /* Resume devices */
2113 device_resume();
2114
2115 /* Notify old style drivers */
2116 broadcast_wake();
2117
2118 pm_restore_console();
2119
2120 return 0;
2121 }
2122
2123 #define GRACKLE_PM (1<<7)
2124 #define GRACKLE_DOZE (1<<5)
2125 #define GRACKLE_NAP (1<<4)
2126 #define GRACKLE_SLEEP (1<<3)
2127
2128 static int powerbook_sleep_grackle(void)
2129 {
2130 unsigned long save_l2cr;
2131 unsigned short pmcr1;
2132 struct adb_request req;
2133 int ret;
2134 struct pci_dev *grackle;
2135
2136 grackle = pci_find_slot(0, 0);
2137 if (!grackle)
2138 return -ENODEV;
2139
2140 ret = pmac_suspend_devices();
2141 if (ret) {
2142 printk(KERN_ERR "Sleep rejected by devices\n");
2143 return ret;
2144 }
2145
2146 /* Turn off various things. Darwin does some retry tests here... */
2147 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2148 pmu_wait_complete(&req);
2149 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2150 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2151 pmu_wait_complete(&req);
2152
2153 /* For 750, save backside cache setting and disable it */
2154 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
2155
2156 if (!__fake_sleep) {
2157 /* Ask the PMU to put us to sleep */
2158 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2159 pmu_wait_complete(&req);
2160 }
2161
2162 /* The VIA is supposed not to be restored correctly*/
2163 save_via_state();
2164 /* We shut down some HW */
2165 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2166
2167 pci_read_config_word(grackle, 0x70, &pmcr1);
2168 /* Apparently, MacOS uses NAP mode for Grackle ??? */
2169 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2170 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2171 pci_write_config_word(grackle, 0x70, pmcr1);
2172
2173 /* Call low-level ASM sleep handler */
2174 if (__fake_sleep)
2175 mdelay(5000);
2176 else
2177 low_sleep_handler();
2178
2179 /* We're awake again, stop grackle PM */
2180 pci_read_config_word(grackle, 0x70, &pmcr1);
2181 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2182 pci_write_config_word(grackle, 0x70, pmcr1);
2183
2184 /* Make sure the PMU is idle */
2185 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2186 restore_via_state();
2187
2188 /* Restore L2 cache */
2189 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2190 _set_L2CR(save_l2cr);
2191
2192 /* Restore userland MMU context */
2193 set_context(current->active_mm->context.id, current->active_mm->pgd);
2194
2195 /* Power things up */
2196 pmu_unlock();
2197 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2198 pmu_wait_complete(&req);
2199 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2200 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2201 pmu_wait_complete(&req);
2202 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2203 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2204 pmu_wait_complete(&req);
2205
2206 pmac_wakeup_devices();
2207
2208 return 0;
2209 }
2210
2211 static int
2212 powerbook_sleep_Core99(void)
2213 {
2214 unsigned long save_l2cr;
2215 unsigned long save_l3cr;
2216 struct adb_request req;
2217 int ret;
2218
2219 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2220 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2221 return -ENOSYS;
2222 }
2223
2224 if (num_online_cpus() > 1 || cpu_is_offline(0))
2225 return -EAGAIN;
2226
2227 ret = pmac_suspend_devices();
2228 if (ret) {
2229 printk(KERN_ERR "Sleep rejected by devices\n");
2230 return ret;
2231 }
2232
2233 /* Stop environment and ADB interrupts */
2234 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2235 pmu_wait_complete(&req);
2236
2237 /* Tell PMU what events will wake us up */
2238 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2239 0xff, 0xff);
2240 pmu_wait_complete(&req);
2241 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2242 0, PMU_PWR_WAKEUP_KEY |
2243 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2244 pmu_wait_complete(&req);
2245
2246 /* Save the state of the L2 and L3 caches */
2247 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
2248 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
2249
2250 if (!__fake_sleep) {
2251 /* Ask the PMU to put us to sleep */
2252 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2253 pmu_wait_complete(&req);
2254 }
2255
2256 /* The VIA is supposed not to be restored correctly*/
2257 save_via_state();
2258
2259 /* Shut down various ASICs. There's a chance that we can no longer
2260 * talk to the PMU after this, so I moved it to _after_ sending the
2261 * sleep command to it. Still need to be checked.
2262 */
2263 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2264
2265 /* Call low-level ASM sleep handler */
2266 if (__fake_sleep)
2267 mdelay(5000);
2268 else
2269 low_sleep_handler();
2270
2271 /* Restore Apple core ASICs state */
2272 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2273
2274 /* Restore VIA */
2275 restore_via_state();
2276
2277 /* tweak LPJ before cpufreq is there */
2278 loops_per_jiffy *= 2;
2279
2280 /* Restore video */
2281 pmac_call_early_video_resume();
2282
2283 /* Restore L2 cache */
2284 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2285 _set_L2CR(save_l2cr);
2286 /* Restore L3 cache */
2287 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2288 _set_L3CR(save_l3cr);
2289
2290 /* Restore userland MMU context */
2291 set_context(current->active_mm->context.id, current->active_mm->pgd);
2292
2293 /* Tell PMU we are ready */
2294 pmu_unlock();
2295 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2296 pmu_wait_complete(&req);
2297 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2298 pmu_wait_complete(&req);
2299
2300 /* Restore LPJ, cpufreq will adjust the cpu frequency */
2301 loops_per_jiffy /= 2;
2302
2303 pmac_wakeup_devices();
2304
2305 return 0;
2306 }
2307
2308 #define PB3400_MEM_CTRL 0xf8000000
2309 #define PB3400_MEM_CTRL_SLEEP 0x70
2310
2311 static int
2312 powerbook_sleep_3400(void)
2313 {
2314 int ret, i, x;
2315 unsigned int hid0;
2316 unsigned long p;
2317 struct adb_request sleep_req;
2318 void __iomem *mem_ctrl;
2319 unsigned int __iomem *mem_ctrl_sleep;
2320
2321 /* first map in the memory controller registers */
2322 mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2323 if (mem_ctrl == NULL) {
2324 printk("powerbook_sleep_3400: ioremap failed\n");
2325 return -ENOMEM;
2326 }
2327 mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2328
2329 /* Allocate room for PCI save */
2330 pbook_alloc_pci_save();
2331
2332 ret = pmac_suspend_devices();
2333 if (ret) {
2334 pbook_free_pci_save();
2335 printk(KERN_ERR "Sleep rejected by devices\n");
2336 return ret;
2337 }
2338
2339 /* Save the state of PCI config space for some slots */
2340 pbook_pci_save();
2341
2342 /* Set the memory controller to keep the memory refreshed
2343 while we're asleep */
2344 for (i = 0x403f; i >= 0x4000; --i) {
2345 out_be32(mem_ctrl_sleep, i);
2346 do {
2347 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2348 } while (x == 0);
2349 if (x >= 0x100)
2350 break;
2351 }
2352
2353 /* Ask the PMU to put us to sleep */
2354 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2355 while (!sleep_req.complete)
2356 mb();
2357
2358 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2359
2360 /* displacement-flush the L2 cache - necessary? */
2361 for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2362 i = *(volatile int *)p;
2363 asleep = 1;
2364
2365 /* Put the CPU into sleep mode */
2366 hid0 = mfspr(SPRN_HID0);
2367 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2368 mtspr(SPRN_HID0, hid0);
2369 mtmsr(mfmsr() | MSR_POW | MSR_EE);
2370 udelay(10);
2371
2372 /* OK, we're awake again, start restoring things */
2373 out_be32(mem_ctrl_sleep, 0x3f);
2374 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2375 pbook_pci_restore();
2376 pmu_unlock();
2377
2378 /* wait for the PMU interrupt sequence to complete */
2379 while (asleep)
2380 mb();
2381
2382 pmac_wakeup_devices();
2383 pbook_free_pci_save();
2384 iounmap(mem_ctrl);
2385
2386 return 0;
2387 }
2388
2389 #endif /* CONFIG_PM && CONFIG_PPC32 */
2390
2391 /*
2392 * Support for /dev/pmu device
2393 */
2394 #define RB_SIZE 0x10
2395 struct pmu_private {
2396 struct list_head list;
2397 int rb_get;
2398 int rb_put;
2399 struct rb_entry {
2400 unsigned short len;
2401 unsigned char data[16];
2402 } rb_buf[RB_SIZE];
2403 wait_queue_head_t wait;
2404 spinlock_t lock;
2405 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2406 int backlight_locker;
2407 #endif
2408 };
2409
2410 static LIST_HEAD(all_pmu_pvt);
2411 static DEFINE_SPINLOCK(all_pvt_lock);
2412
2413 static void
2414 pmu_pass_intr(unsigned char *data, int len)
2415 {
2416 struct pmu_private *pp;
2417 struct list_head *list;
2418 int i;
2419 unsigned long flags;
2420
2421 if (len > sizeof(pp->rb_buf[0].data))
2422 len = sizeof(pp->rb_buf[0].data);
2423 spin_lock_irqsave(&all_pvt_lock, flags);
2424 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2425 pp = list_entry(list, struct pmu_private, list);
2426 spin_lock(&pp->lock);
2427 i = pp->rb_put + 1;
2428 if (i >= RB_SIZE)
2429 i = 0;
2430 if (i != pp->rb_get) {
2431 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2432 rp->len = len;
2433 memcpy(rp->data, data, len);
2434 pp->rb_put = i;
2435 wake_up_interruptible(&pp->wait);
2436 }
2437 spin_unlock(&pp->lock);
2438 }
2439 spin_unlock_irqrestore(&all_pvt_lock, flags);
2440 }
2441
2442 static int
2443 pmu_open(struct inode *inode, struct file *file)
2444 {
2445 struct pmu_private *pp;
2446 unsigned long flags;
2447
2448 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2449 if (pp == 0)
2450 return -ENOMEM;
2451 pp->rb_get = pp->rb_put = 0;
2452 spin_lock_init(&pp->lock);
2453 init_waitqueue_head(&pp->wait);
2454 spin_lock_irqsave(&all_pvt_lock, flags);
2455 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2456 pp->backlight_locker = 0;
2457 #endif
2458 list_add(&pp->list, &all_pmu_pvt);
2459 spin_unlock_irqrestore(&all_pvt_lock, flags);
2460 file->private_data = pp;
2461 return 0;
2462 }
2463
2464 static ssize_t
2465 pmu_read(struct file *file, char __user *buf,
2466 size_t count, loff_t *ppos)
2467 {
2468 struct pmu_private *pp = file->private_data;
2469 DECLARE_WAITQUEUE(wait, current);
2470 unsigned long flags;
2471 int ret = 0;
2472
2473 if (count < 1 || pp == 0)
2474 return -EINVAL;
2475 if (!access_ok(VERIFY_WRITE, buf, count))
2476 return -EFAULT;
2477
2478 spin_lock_irqsave(&pp->lock, flags);
2479 add_wait_queue(&pp->wait, &wait);
2480 current->state = TASK_INTERRUPTIBLE;
2481
2482 for (;;) {
2483 ret = -EAGAIN;
2484 if (pp->rb_get != pp->rb_put) {
2485 int i = pp->rb_get;
2486 struct rb_entry *rp = &pp->rb_buf[i];
2487 ret = rp->len;
2488 spin_unlock_irqrestore(&pp->lock, flags);
2489 if (ret > count)
2490 ret = count;
2491 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2492 ret = -EFAULT;
2493 if (++i >= RB_SIZE)
2494 i = 0;
2495 spin_lock_irqsave(&pp->lock, flags);
2496 pp->rb_get = i;
2497 }
2498 if (ret >= 0)
2499 break;
2500 if (file->f_flags & O_NONBLOCK)
2501 break;
2502 ret = -ERESTARTSYS;
2503 if (signal_pending(current))
2504 break;
2505 spin_unlock_irqrestore(&pp->lock, flags);
2506 schedule();
2507 spin_lock_irqsave(&pp->lock, flags);
2508 }
2509 current->state = TASK_RUNNING;
2510 remove_wait_queue(&pp->wait, &wait);
2511 spin_unlock_irqrestore(&pp->lock, flags);
2512
2513 return ret;
2514 }
2515
2516 static ssize_t
2517 pmu_write(struct file *file, const char __user *buf,
2518 size_t count, loff_t *ppos)
2519 {
2520 return 0;
2521 }
2522
2523 static unsigned int
2524 pmu_fpoll(struct file *filp, poll_table *wait)
2525 {
2526 struct pmu_private *pp = filp->private_data;
2527 unsigned int mask = 0;
2528 unsigned long flags;
2529
2530 if (pp == 0)
2531 return 0;
2532 poll_wait(filp, &pp->wait, wait);
2533 spin_lock_irqsave(&pp->lock, flags);
2534 if (pp->rb_get != pp->rb_put)
2535 mask |= POLLIN;
2536 spin_unlock_irqrestore(&pp->lock, flags);
2537 return mask;
2538 }
2539
2540 static int
2541 pmu_release(struct inode *inode, struct file *file)
2542 {
2543 struct pmu_private *pp = file->private_data;
2544 unsigned long flags;
2545
2546 lock_kernel();
2547 if (pp != 0) {
2548 file->private_data = NULL;
2549 spin_lock_irqsave(&all_pvt_lock, flags);
2550 list_del(&pp->list);
2551 spin_unlock_irqrestore(&all_pvt_lock, flags);
2552
2553 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2554 if (pp->backlight_locker)
2555 pmac_backlight_enable();
2556 #endif
2557
2558 kfree(pp);
2559 }
2560 unlock_kernel();
2561 return 0;
2562 }
2563
2564 static int
2565 pmu_ioctl(struct inode * inode, struct file *filp,
2566 u_int cmd, u_long arg)
2567 {
2568 __u32 __user *argp = (__u32 __user *)arg;
2569 int error = -EINVAL;
2570
2571 switch (cmd) {
2572 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2573 case PMU_IOC_SLEEP:
2574 if (!capable(CAP_SYS_ADMIN))
2575 return -EACCES;
2576 if (sleep_in_progress)
2577 return -EBUSY;
2578 sleep_in_progress = 1;
2579 switch (pmu_kind) {
2580 case PMU_OHARE_BASED:
2581 error = powerbook_sleep_3400();
2582 break;
2583 case PMU_HEATHROW_BASED:
2584 case PMU_PADDINGTON_BASED:
2585 error = powerbook_sleep_grackle();
2586 break;
2587 case PMU_KEYLARGO_BASED:
2588 error = powerbook_sleep_Core99();
2589 break;
2590 default:
2591 error = -ENOSYS;
2592 }
2593 sleep_in_progress = 0;
2594 break;
2595 case PMU_IOC_CAN_SLEEP:
2596 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2597 return put_user(0, argp);
2598 else
2599 return put_user(1, argp);
2600 #endif /* CONFIG_PM && CONFIG_PPC32 */
2601
2602 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2603 /* Compatibility ioctl's for backlight */
2604 case PMU_IOC_GET_BACKLIGHT:
2605 {
2606 int brightness;
2607
2608 if (sleep_in_progress)
2609 return -EBUSY;
2610
2611 brightness = pmac_backlight_get_legacy_brightness();
2612 if (brightness < 0)
2613 return brightness;
2614 else
2615 return put_user(brightness, argp);
2616
2617 }
2618 case PMU_IOC_SET_BACKLIGHT:
2619 {
2620 int brightness;
2621
2622 if (sleep_in_progress)
2623 return -EBUSY;
2624
2625 error = get_user(brightness, argp);
2626 if (error)
2627 return error;
2628
2629 return pmac_backlight_set_legacy_brightness(brightness);
2630 }
2631 #ifdef CONFIG_INPUT_ADBHID
2632 case PMU_IOC_GRAB_BACKLIGHT: {
2633 struct pmu_private *pp = filp->private_data;
2634
2635 if (pp->backlight_locker)
2636 return 0;
2637
2638 pp->backlight_locker = 1;
2639 pmac_backlight_disable();
2640
2641 return 0;
2642 }
2643 #endif /* CONFIG_INPUT_ADBHID */
2644 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2645
2646 case PMU_IOC_GET_MODEL:
2647 return put_user(pmu_kind, argp);
2648 case PMU_IOC_HAS_ADB:
2649 return put_user(pmu_has_adb, argp);
2650 }
2651 return error;
2652 }
2653
2654 static struct file_operations pmu_device_fops = {
2655 .read = pmu_read,
2656 .write = pmu_write,
2657 .poll = pmu_fpoll,
2658 .ioctl = pmu_ioctl,
2659 .open = pmu_open,
2660 .release = pmu_release,
2661 };
2662
2663 static struct miscdevice pmu_device = {
2664 PMU_MINOR, "pmu", &pmu_device_fops
2665 };
2666
2667 static int pmu_device_init(void)
2668 {
2669 if (!via)
2670 return 0;
2671 if (misc_register(&pmu_device) < 0)
2672 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2673 return 0;
2674 }
2675 device_initcall(pmu_device_init);
2676
2677
2678 #ifdef DEBUG_SLEEP
2679 static inline void
2680 polled_handshake(volatile unsigned char __iomem *via)
2681 {
2682 via[B] &= ~TREQ; eieio();
2683 while ((via[B] & TACK) != 0)
2684 ;
2685 via[B] |= TREQ; eieio();
2686 while ((via[B] & TACK) == 0)
2687 ;
2688 }
2689
2690 static inline void
2691 polled_send_byte(volatile unsigned char __iomem *via, int x)
2692 {
2693 via[ACR] |= SR_OUT | SR_EXT; eieio();
2694 via[SR] = x; eieio();
2695 polled_handshake(via);
2696 }
2697
2698 static inline int
2699 polled_recv_byte(volatile unsigned char __iomem *via)
2700 {
2701 int x;
2702
2703 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2704 x = via[SR]; eieio();
2705 polled_handshake(via);
2706 x = via[SR]; eieio();
2707 return x;
2708 }
2709
2710 int
2711 pmu_polled_request(struct adb_request *req)
2712 {
2713 unsigned long flags;
2714 int i, l, c;
2715 volatile unsigned char __iomem *v = via;
2716
2717 req->complete = 1;
2718 c = req->data[0];
2719 l = pmu_data_len[c][0];
2720 if (l >= 0 && req->nbytes != l + 1)
2721 return -EINVAL;
2722
2723 local_irq_save(flags);
2724 while (pmu_state != idle)
2725 pmu_poll();
2726
2727 while ((via[B] & TACK) == 0)
2728 ;
2729 polled_send_byte(v, c);
2730 if (l < 0) {
2731 l = req->nbytes - 1;
2732 polled_send_byte(v, l);
2733 }
2734 for (i = 1; i <= l; ++i)
2735 polled_send_byte(v, req->data[i]);
2736
2737 l = pmu_data_len[c][1];
2738 if (l < 0)
2739 l = polled_recv_byte(v);
2740 for (i = 0; i < l; ++i)
2741 req->reply[i + req->reply_len] = polled_recv_byte(v);
2742
2743 if (req->done)
2744 (*req->done)(req);
2745
2746 local_irq_restore(flags);
2747 return 0;
2748 }
2749 #endif /* DEBUG_SLEEP */
2750
2751
2752 /* FIXME: This is a temporary set of callbacks to enable us
2753 * to do suspend-to-disk.
2754 */
2755
2756 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2757
2758 static int pmu_sys_suspended = 0;
2759
2760 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2761 {
2762 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2763 return 0;
2764
2765 /* Suspend PMU event interrupts */
2766 pmu_suspend();
2767
2768 pmu_sys_suspended = 1;
2769 return 0;
2770 }
2771
2772 static int pmu_sys_resume(struct sys_device *sysdev)
2773 {
2774 struct adb_request req;
2775
2776 if (!pmu_sys_suspended)
2777 return 0;
2778
2779 /* Tell PMU we are ready */
2780 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2781 pmu_wait_complete(&req);
2782
2783 /* Resume PMU event interrupts */
2784 pmu_resume();
2785
2786 pmu_sys_suspended = 0;
2787
2788 return 0;
2789 }
2790
2791 #endif /* CONFIG_PM && CONFIG_PPC32 */
2792
2793 static struct sysdev_class pmu_sysclass = {
2794 set_kset_name("pmu"),
2795 };
2796
2797 static struct sys_device device_pmu = {
2798 .id = 0,
2799 .cls = &pmu_sysclass,
2800 };
2801
2802 static struct sysdev_driver driver_pmu = {
2803 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2804 .suspend = &pmu_sys_suspend,
2805 .resume = &pmu_sys_resume,
2806 #endif /* CONFIG_PM && CONFIG_PPC32 */
2807 };
2808
2809 static int __init init_pmu_sysfs(void)
2810 {
2811 int rc;
2812
2813 rc = sysdev_class_register(&pmu_sysclass);
2814 if (rc) {
2815 printk(KERN_ERR "Failed registering PMU sys class\n");
2816 return -ENODEV;
2817 }
2818 rc = sysdev_register(&device_pmu);
2819 if (rc) {
2820 printk(KERN_ERR "Failed registering PMU sys device\n");
2821 return -ENODEV;
2822 }
2823 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2824 if (rc) {
2825 printk(KERN_ERR "Failed registering PMU sys driver\n");
2826 return -ENODEV;
2827 }
2828 return 0;
2829 }
2830
2831 subsys_initcall(init_pmu_sysfs);
2832
2833 EXPORT_SYMBOL(pmu_request);
2834 EXPORT_SYMBOL(pmu_queue_request);
2835 EXPORT_SYMBOL(pmu_poll);
2836 EXPORT_SYMBOL(pmu_poll_adb);
2837 EXPORT_SYMBOL(pmu_wait_complete);
2838 EXPORT_SYMBOL(pmu_suspend);
2839 EXPORT_SYMBOL(pmu_resume);
2840 EXPORT_SYMBOL(pmu_unlock);
2841 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2842 EXPORT_SYMBOL(pmu_enable_irled);
2843 EXPORT_SYMBOL(pmu_battery_count);
2844 EXPORT_SYMBOL(pmu_batteries);
2845 EXPORT_SYMBOL(pmu_power_flags);
2846 #endif /* CONFIG_PM && CONFIG_PPC32 */
2847