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[mirror_ubuntu-zesty-kernel.git] / drivers / macintosh / via-pmu.c
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 * Copyright (C) 2006-2007 Johannes Berg
14 *
15 * THIS DRIVER IS BECOMING A TOTAL MESS !
16 * - Cleanup atomically disabling reply to PMU events after
17 * a sleep or a freq. switch
18 *
19 */
20 #include <stdarg.h>
21 #include <linux/mutex.h>
22 #include <linux/types.h>
23 #include <linux/errno.h>
24 #include <linux/kernel.h>
25 #include <linux/delay.h>
26 #include <linux/sched.h>
27 #include <linux/miscdevice.h>
28 #include <linux/blkdev.h>
29 #include <linux/pci.h>
30 #include <linux/slab.h>
31 #include <linux/poll.h>
32 #include <linux/adb.h>
33 #include <linux/pmu.h>
34 #include <linux/cuda.h>
35 #include <linux/module.h>
36 #include <linux/spinlock.h>
37 #include <linux/pm.h>
38 #include <linux/proc_fs.h>
39 #include <linux/seq_file.h>
40 #include <linux/init.h>
41 #include <linux/interrupt.h>
42 #include <linux/device.h>
43 #include <linux/syscore_ops.h>
44 #include <linux/freezer.h>
45 #include <linux/syscalls.h>
46 #include <linux/suspend.h>
47 #include <linux/cpu.h>
48 #include <linux/compat.h>
49 #include <linux/of_address.h>
50 #include <linux/of_irq.h>
51 #include <asm/prom.h>
52 #include <asm/machdep.h>
53 #include <asm/io.h>
54 #include <asm/pgtable.h>
55 #include <asm/sections.h>
56 #include <asm/irq.h>
57 #include <asm/pmac_feature.h>
58 #include <asm/pmac_pfunc.h>
59 #include <asm/pmac_low_i2c.h>
60 #include <asm/uaccess.h>
61 #include <asm/mmu_context.h>
62 #include <asm/cputable.h>
63 #include <asm/time.h>
64 #include <asm/backlight.h>
65
66 #include "via-pmu-event.h"
67
68 /* Some compile options */
69 #undef DEBUG_SLEEP
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 DEFINE_MUTEX(pmu_info_proc_mutex);
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;
145 static int pmu_has_adb;
146 static struct device_node *gpio_node;
147 static unsigned char __iomem *gpio_reg;
148 static int gpio_irq = NO_IRQ;
149 static int gpio_irq_enabled = -1;
150 static volatile int pmu_suspended;
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_SUSPEND) && defined(CONFIG_PPC32)
156 static int option_lid_wakeup = 1;
157 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
158 static unsigned long async_req_locks;
159 static unsigned int pmu_irq_stats[11];
160
161 static struct proc_dir_entry *proc_pmu_root;
162 static struct proc_dir_entry *proc_pmu_info;
163 static struct proc_dir_entry *proc_pmu_irqstats;
164 static struct proc_dir_entry *proc_pmu_options;
165 static int option_server_mode;
166
167 int pmu_battery_count;
168 int pmu_cur_battery;
169 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
170 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
171 static int query_batt_timer = BATTERY_POLLING_COUNT;
172 static struct adb_request batt_req;
173 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
174
175 int __fake_sleep;
176 int asleep;
177
178 #ifdef CONFIG_ADB
179 static int adb_dev_map;
180 static int pmu_adb_flags;
181
182 static int pmu_probe(void);
183 static int pmu_init(void);
184 static int pmu_send_request(struct adb_request *req, int sync);
185 static int pmu_adb_autopoll(int devs);
186 static int pmu_adb_reset_bus(void);
187 #endif /* CONFIG_ADB */
188
189 static int init_pmu(void);
190 static void pmu_start(void);
191 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
192 static irqreturn_t gpio1_interrupt(int irq, void *arg);
193 static const struct file_operations pmu_info_proc_fops;
194 static const struct file_operations pmu_irqstats_proc_fops;
195 static void pmu_pass_intr(unsigned char *data, int len);
196 static const struct file_operations pmu_battery_proc_fops;
197 static const struct file_operations pmu_options_proc_fops;
198
199 #ifdef CONFIG_ADB
200 struct adb_driver via_pmu_driver = {
201 "PMU",
202 pmu_probe,
203 pmu_init,
204 pmu_send_request,
205 pmu_adb_autopoll,
206 pmu_poll_adb,
207 pmu_adb_reset_bus
208 };
209 #endif /* CONFIG_ADB */
210
211 extern void low_sleep_handler(void);
212 extern void enable_kernel_altivec(void);
213 extern void enable_kernel_fp(void);
214
215 #ifdef DEBUG_SLEEP
216 int pmu_polled_request(struct adb_request *req);
217 void pmu_blink(int n);
218 #endif
219
220 /*
221 * This table indicates for each PMU opcode:
222 * - the number of data bytes to be sent with the command, or -1
223 * if a length byte should be sent,
224 * - the number of response bytes which the PMU will return, or
225 * -1 if it will send a length byte.
226 */
227 static const s8 pmu_data_len[256][2] = {
228 /* 0 1 2 3 4 5 6 7 */
229 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
230 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
231 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
232 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
233 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
234 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
235 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
236 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
237 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
238 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
239 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
240 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
241 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
242 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
243 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
244 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
245 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
246 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
247 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
248 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
249 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
250 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
251 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
252 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
253 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
254 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
255 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
256 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
257 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
258 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
259 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
260 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
261 };
262
263 static char *pbook_type[] = {
264 "Unknown PowerBook",
265 "PowerBook 2400/3400/3500(G3)",
266 "PowerBook G3 Series",
267 "1999 PowerBook G3",
268 "Core99"
269 };
270
271 int __init find_via_pmu(void)
272 {
273 u64 taddr;
274 const u32 *reg;
275
276 if (via != 0)
277 return 1;
278 vias = of_find_node_by_name(NULL, "via-pmu");
279 if (vias == NULL)
280 return 0;
281
282 reg = of_get_property(vias, "reg", NULL);
283 if (reg == NULL) {
284 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
285 goto fail;
286 }
287 taddr = of_translate_address(vias, reg);
288 if (taddr == OF_BAD_ADDR) {
289 printk(KERN_ERR "via-pmu: Can't translate address !\n");
290 goto fail;
291 }
292
293 spin_lock_init(&pmu_lock);
294
295 pmu_has_adb = 1;
296
297 pmu_intr_mask = PMU_INT_PCEJECT |
298 PMU_INT_SNDBRT |
299 PMU_INT_ADB |
300 PMU_INT_TICK;
301
302 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
303 || of_device_is_compatible(vias->parent, "ohare")))
304 pmu_kind = PMU_OHARE_BASED;
305 else if (of_device_is_compatible(vias->parent, "paddington"))
306 pmu_kind = PMU_PADDINGTON_BASED;
307 else if (of_device_is_compatible(vias->parent, "heathrow"))
308 pmu_kind = PMU_HEATHROW_BASED;
309 else if (of_device_is_compatible(vias->parent, "Keylargo")
310 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
311 struct device_node *gpiop;
312 struct device_node *adbp;
313 u64 gaddr = OF_BAD_ADDR;
314
315 pmu_kind = PMU_KEYLARGO_BASED;
316 adbp = of_find_node_by_type(NULL, "adb");
317 pmu_has_adb = (adbp != NULL);
318 of_node_put(adbp);
319 pmu_intr_mask = PMU_INT_PCEJECT |
320 PMU_INT_SNDBRT |
321 PMU_INT_ADB |
322 PMU_INT_TICK |
323 PMU_INT_ENVIRONMENT;
324
325 gpiop = of_find_node_by_name(NULL, "gpio");
326 if (gpiop) {
327 reg = of_get_property(gpiop, "reg", NULL);
328 if (reg)
329 gaddr = of_translate_address(gpiop, reg);
330 if (gaddr != OF_BAD_ADDR)
331 gpio_reg = ioremap(gaddr, 0x10);
332 of_node_put(gpiop);
333 }
334 if (gpio_reg == NULL) {
335 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
336 goto fail;
337 }
338 } else
339 pmu_kind = PMU_UNKNOWN;
340
341 via = ioremap(taddr, 0x2000);
342 if (via == NULL) {
343 printk(KERN_ERR "via-pmu: Can't map address !\n");
344 goto fail_via_remap;
345 }
346
347 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
348 out_8(&via[IFR], 0x7f); /* clear IFR */
349
350 pmu_state = idle;
351
352 if (!init_pmu())
353 goto fail_init;
354
355 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
356 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
357
358 sys_ctrler = SYS_CTRLER_PMU;
359
360 return 1;
361
362 fail_init:
363 iounmap(via);
364 via = NULL;
365 fail_via_remap:
366 iounmap(gpio_reg);
367 gpio_reg = NULL;
368 fail:
369 of_node_put(vias);
370 vias = NULL;
371 return 0;
372 }
373
374 #ifdef CONFIG_ADB
375 static int pmu_probe(void)
376 {
377 return vias == NULL? -ENODEV: 0;
378 }
379
380 static int __init pmu_init(void)
381 {
382 if (vias == NULL)
383 return -ENODEV;
384 return 0;
385 }
386 #endif /* CONFIG_ADB */
387
388 /*
389 * We can't wait until pmu_init gets called, that happens too late.
390 * It happens after IDE and SCSI initialization, which can take a few
391 * seconds, and by that time the PMU could have given up on us and
392 * turned us off.
393 * Thus this is called with arch_initcall rather than device_initcall.
394 */
395 static int __init via_pmu_start(void)
396 {
397 unsigned int irq;
398
399 if (vias == NULL)
400 return -ENODEV;
401
402 batt_req.complete = 1;
403
404 irq = irq_of_parse_and_map(vias, 0);
405 if (irq == NO_IRQ) {
406 printk(KERN_ERR "via-pmu: can't map interrupt\n");
407 return -ENODEV;
408 }
409 /* We set IRQF_NO_SUSPEND because we don't want the interrupt
410 * to be disabled between the 2 passes of driver suspend, we
411 * control our own disabling for that one
412 */
413 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
414 "VIA-PMU", (void *)0)) {
415 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
416 return -ENODEV;
417 }
418
419 if (pmu_kind == PMU_KEYLARGO_BASED) {
420 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
421 if (gpio_node == NULL)
422 gpio_node = of_find_node_by_name(NULL,
423 "pmu-interrupt");
424 if (gpio_node)
425 gpio_irq = irq_of_parse_and_map(gpio_node, 0);
426
427 if (gpio_irq != NO_IRQ) {
428 if (request_irq(gpio_irq, gpio1_interrupt, IRQF_TIMER,
429 "GPIO1 ADB", (void *)0))
430 printk(KERN_ERR "pmu: can't get irq %d"
431 " (GPIO1)\n", gpio_irq);
432 else
433 gpio_irq_enabled = 1;
434 }
435 }
436
437 /* Enable interrupts */
438 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
439
440 pmu_fully_inited = 1;
441
442 /* Make sure PMU settle down before continuing. This is _very_ important
443 * since the IDE probe may shut interrupts down for quite a bit of time. If
444 * a PMU communication is pending while this happens, the PMU may timeout
445 * Not that on Core99 machines, the PMU keeps sending us environement
446 * messages, we should find a way to either fix IDE or make it call
447 * pmu_suspend() before masking interrupts. This can also happens while
448 * scolling with some fbdevs.
449 */
450 do {
451 pmu_poll();
452 } while (pmu_state != idle);
453
454 return 0;
455 }
456
457 arch_initcall(via_pmu_start);
458
459 /*
460 * This has to be done after pci_init, which is a subsys_initcall.
461 */
462 static int __init via_pmu_dev_init(void)
463 {
464 if (vias == NULL)
465 return -ENODEV;
466
467 #ifdef CONFIG_PMAC_BACKLIGHT
468 /* Initialize backlight */
469 pmu_backlight_init();
470 #endif
471
472 #ifdef CONFIG_PPC32
473 if (of_machine_is_compatible("AAPL,3400/2400") ||
474 of_machine_is_compatible("AAPL,3500")) {
475 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
476 NULL, PMAC_MB_INFO_MODEL, 0);
477 pmu_battery_count = 1;
478 if (mb == PMAC_TYPE_COMET)
479 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
480 else
481 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
482 } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
483 of_machine_is_compatible("PowerBook1,1")) {
484 pmu_battery_count = 2;
485 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
486 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
487 } else {
488 struct device_node* prim =
489 of_find_node_by_name(NULL, "power-mgt");
490 const u32 *prim_info = NULL;
491 if (prim)
492 prim_info = of_get_property(prim, "prim-info", NULL);
493 if (prim_info) {
494 /* Other stuffs here yet unknown */
495 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
496 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
497 if (pmu_battery_count > 1)
498 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
499 }
500 of_node_put(prim);
501 }
502 #endif /* CONFIG_PPC32 */
503
504 /* Create /proc/pmu */
505 proc_pmu_root = proc_mkdir("pmu", NULL);
506 if (proc_pmu_root) {
507 long i;
508
509 for (i=0; i<pmu_battery_count; i++) {
510 char title[16];
511 sprintf(title, "battery_%ld", i);
512 proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
513 &pmu_battery_proc_fops, (void *)i);
514 }
515
516 proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
517 proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
518 &pmu_irqstats_proc_fops);
519 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
520 &pmu_options_proc_fops);
521 }
522 return 0;
523 }
524
525 device_initcall(via_pmu_dev_init);
526
527 static int
528 init_pmu(void)
529 {
530 int timeout;
531 struct adb_request req;
532
533 out_8(&via[B], via[B] | TREQ); /* negate TREQ */
534 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */
535
536 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
537 timeout = 100000;
538 while (!req.complete) {
539 if (--timeout < 0) {
540 printk(KERN_ERR "init_pmu: no response from PMU\n");
541 return 0;
542 }
543 udelay(10);
544 pmu_poll();
545 }
546
547 /* ack all pending interrupts */
548 timeout = 100000;
549 interrupt_data[0][0] = 1;
550 while (interrupt_data[0][0] || pmu_state != idle) {
551 if (--timeout < 0) {
552 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
553 return 0;
554 }
555 if (pmu_state == idle)
556 adb_int_pending = 1;
557 via_pmu_interrupt(0, NULL);
558 udelay(10);
559 }
560
561 /* Tell PMU we are ready. */
562 if (pmu_kind == PMU_KEYLARGO_BASED) {
563 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
564 while (!req.complete)
565 pmu_poll();
566 }
567
568 /* Read PMU version */
569 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
570 pmu_wait_complete(&req);
571 if (req.reply_len > 0)
572 pmu_version = req.reply[0];
573
574 /* Read server mode setting */
575 if (pmu_kind == PMU_KEYLARGO_BASED) {
576 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
577 PMU_PWR_GET_POWERUP_EVENTS);
578 pmu_wait_complete(&req);
579 if (req.reply_len == 2) {
580 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
581 option_server_mode = 1;
582 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
583 option_server_mode ? "enabled" : "disabled");
584 }
585 }
586 return 1;
587 }
588
589 int
590 pmu_get_model(void)
591 {
592 return pmu_kind;
593 }
594
595 static void pmu_set_server_mode(int server_mode)
596 {
597 struct adb_request req;
598
599 if (pmu_kind != PMU_KEYLARGO_BASED)
600 return;
601
602 option_server_mode = server_mode;
603 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
604 pmu_wait_complete(&req);
605 if (req.reply_len < 2)
606 return;
607 if (server_mode)
608 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
609 PMU_PWR_SET_POWERUP_EVENTS,
610 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
611 else
612 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
613 PMU_PWR_CLR_POWERUP_EVENTS,
614 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
615 pmu_wait_complete(&req);
616 }
617
618 /* This new version of the code for 2400/3400/3500 powerbooks
619 * is inspired from the implementation in gkrellm-pmu
620 */
621 static void
622 done_battery_state_ohare(struct adb_request* req)
623 {
624 /* format:
625 * [0] : flags
626 * 0x01 : AC indicator
627 * 0x02 : charging
628 * 0x04 : battery exist
629 * 0x08 :
630 * 0x10 :
631 * 0x20 : full charged
632 * 0x40 : pcharge reset
633 * 0x80 : battery exist
634 *
635 * [1][2] : battery voltage
636 * [3] : CPU temperature
637 * [4] : battery temperature
638 * [5] : current
639 * [6][7] : pcharge
640 * --tkoba
641 */
642 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
643 long pcharge, charge, vb, vmax, lmax;
644 long vmax_charging, vmax_charged;
645 long amperage, voltage, time, max;
646 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
647 NULL, PMAC_MB_INFO_MODEL, 0);
648
649 if (req->reply[0] & 0x01)
650 pmu_power_flags |= PMU_PWR_AC_PRESENT;
651 else
652 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
653
654 if (mb == PMAC_TYPE_COMET) {
655 vmax_charged = 189;
656 vmax_charging = 213;
657 lmax = 6500;
658 } else {
659 vmax_charged = 330;
660 vmax_charging = 330;
661 lmax = 6500;
662 }
663 vmax = vmax_charged;
664
665 /* If battery installed */
666 if (req->reply[0] & 0x04) {
667 bat_flags |= PMU_BATT_PRESENT;
668 if (req->reply[0] & 0x02)
669 bat_flags |= PMU_BATT_CHARGING;
670 vb = (req->reply[1] << 8) | req->reply[2];
671 voltage = (vb * 265 + 72665) / 10;
672 amperage = req->reply[5];
673 if ((req->reply[0] & 0x01) == 0) {
674 if (amperage > 200)
675 vb += ((amperage - 200) * 15)/100;
676 } else if (req->reply[0] & 0x02) {
677 vb = (vb * 97) / 100;
678 vmax = vmax_charging;
679 }
680 charge = (100 * vb) / vmax;
681 if (req->reply[0] & 0x40) {
682 pcharge = (req->reply[6] << 8) + req->reply[7];
683 if (pcharge > lmax)
684 pcharge = lmax;
685 pcharge *= 100;
686 pcharge = 100 - pcharge / lmax;
687 if (pcharge < charge)
688 charge = pcharge;
689 }
690 if (amperage > 0)
691 time = (charge * 16440) / amperage;
692 else
693 time = 0;
694 max = 100;
695 amperage = -amperage;
696 } else
697 charge = max = amperage = voltage = time = 0;
698
699 pmu_batteries[pmu_cur_battery].flags = bat_flags;
700 pmu_batteries[pmu_cur_battery].charge = charge;
701 pmu_batteries[pmu_cur_battery].max_charge = max;
702 pmu_batteries[pmu_cur_battery].amperage = amperage;
703 pmu_batteries[pmu_cur_battery].voltage = voltage;
704 pmu_batteries[pmu_cur_battery].time_remaining = time;
705
706 clear_bit(0, &async_req_locks);
707 }
708
709 static void
710 done_battery_state_smart(struct adb_request* req)
711 {
712 /* format:
713 * [0] : format of this structure (known: 3,4,5)
714 * [1] : flags
715 *
716 * format 3 & 4:
717 *
718 * [2] : charge
719 * [3] : max charge
720 * [4] : current
721 * [5] : voltage
722 *
723 * format 5:
724 *
725 * [2][3] : charge
726 * [4][5] : max charge
727 * [6][7] : current
728 * [8][9] : voltage
729 */
730
731 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
732 int amperage;
733 unsigned int capa, max, voltage;
734
735 if (req->reply[1] & 0x01)
736 pmu_power_flags |= PMU_PWR_AC_PRESENT;
737 else
738 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
739
740
741 capa = max = amperage = voltage = 0;
742
743 if (req->reply[1] & 0x04) {
744 bat_flags |= PMU_BATT_PRESENT;
745 switch(req->reply[0]) {
746 case 3:
747 case 4: capa = req->reply[2];
748 max = req->reply[3];
749 amperage = *((signed char *)&req->reply[4]);
750 voltage = req->reply[5];
751 break;
752 case 5: capa = (req->reply[2] << 8) | req->reply[3];
753 max = (req->reply[4] << 8) | req->reply[5];
754 amperage = *((signed short *)&req->reply[6]);
755 voltage = (req->reply[8] << 8) | req->reply[9];
756 break;
757 default:
758 pr_warn("pmu.c: unrecognized battery info, "
759 "len: %d, %4ph\n", req->reply_len,
760 req->reply);
761 break;
762 }
763 }
764
765 if ((req->reply[1] & 0x01) && (amperage > 0))
766 bat_flags |= PMU_BATT_CHARGING;
767
768 pmu_batteries[pmu_cur_battery].flags = bat_flags;
769 pmu_batteries[pmu_cur_battery].charge = capa;
770 pmu_batteries[pmu_cur_battery].max_charge = max;
771 pmu_batteries[pmu_cur_battery].amperage = amperage;
772 pmu_batteries[pmu_cur_battery].voltage = voltage;
773 if (amperage) {
774 if ((req->reply[1] & 0x01) && (amperage > 0))
775 pmu_batteries[pmu_cur_battery].time_remaining
776 = ((max-capa) * 3600) / amperage;
777 else
778 pmu_batteries[pmu_cur_battery].time_remaining
779 = (capa * 3600) / (-amperage);
780 } else
781 pmu_batteries[pmu_cur_battery].time_remaining = 0;
782
783 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
784
785 clear_bit(0, &async_req_locks);
786 }
787
788 static void
789 query_battery_state(void)
790 {
791 if (test_and_set_bit(0, &async_req_locks))
792 return;
793 if (pmu_kind == PMU_OHARE_BASED)
794 pmu_request(&batt_req, done_battery_state_ohare,
795 1, PMU_BATTERY_STATE);
796 else
797 pmu_request(&batt_req, done_battery_state_smart,
798 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
799 }
800
801 static int pmu_info_proc_show(struct seq_file *m, void *v)
802 {
803 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
804 seq_printf(m, "PMU firmware version : %02x\n", pmu_version);
805 seq_printf(m, "AC Power : %d\n",
806 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
807 seq_printf(m, "Battery count : %d\n", pmu_battery_count);
808
809 return 0;
810 }
811
812 static int pmu_info_proc_open(struct inode *inode, struct file *file)
813 {
814 return single_open(file, pmu_info_proc_show, NULL);
815 }
816
817 static const struct file_operations pmu_info_proc_fops = {
818 .owner = THIS_MODULE,
819 .open = pmu_info_proc_open,
820 .read = seq_read,
821 .llseek = seq_lseek,
822 .release = single_release,
823 };
824
825 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
826 {
827 int i;
828 static const char *irq_names[] = {
829 "Total CB1 triggered events",
830 "Total GPIO1 triggered events",
831 "PC-Card eject button",
832 "Sound/Brightness button",
833 "ADB message",
834 "Battery state change",
835 "Environment interrupt",
836 "Tick timer",
837 "Ghost interrupt (zero len)",
838 "Empty interrupt (empty mask)",
839 "Max irqs in a row"
840 };
841
842 for (i=0; i<11; i++) {
843 seq_printf(m, " %2u: %10u (%s)\n",
844 i, pmu_irq_stats[i], irq_names[i]);
845 }
846 return 0;
847 }
848
849 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
850 {
851 return single_open(file, pmu_irqstats_proc_show, NULL);
852 }
853
854 static const struct file_operations pmu_irqstats_proc_fops = {
855 .owner = THIS_MODULE,
856 .open = pmu_irqstats_proc_open,
857 .read = seq_read,
858 .llseek = seq_lseek,
859 .release = single_release,
860 };
861
862 static int pmu_battery_proc_show(struct seq_file *m, void *v)
863 {
864 long batnum = (long)m->private;
865
866 seq_putc(m, '\n');
867 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags);
868 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge);
869 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
870 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage);
871 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage);
872 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining);
873 return 0;
874 }
875
876 static int pmu_battery_proc_open(struct inode *inode, struct file *file)
877 {
878 return single_open(file, pmu_battery_proc_show, PDE_DATA(inode));
879 }
880
881 static const struct file_operations pmu_battery_proc_fops = {
882 .owner = THIS_MODULE,
883 .open = pmu_battery_proc_open,
884 .read = seq_read,
885 .llseek = seq_lseek,
886 .release = single_release,
887 };
888
889 static int pmu_options_proc_show(struct seq_file *m, void *v)
890 {
891 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
892 if (pmu_kind == PMU_KEYLARGO_BASED &&
893 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
894 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
895 #endif
896 if (pmu_kind == PMU_KEYLARGO_BASED)
897 seq_printf(m, "server_mode=%d\n", option_server_mode);
898
899 return 0;
900 }
901
902 static int pmu_options_proc_open(struct inode *inode, struct file *file)
903 {
904 return single_open(file, pmu_options_proc_show, NULL);
905 }
906
907 static ssize_t pmu_options_proc_write(struct file *file,
908 const char __user *buffer, size_t count, loff_t *pos)
909 {
910 char tmp[33];
911 char *label, *val;
912 size_t fcount = count;
913
914 if (!count)
915 return -EINVAL;
916 if (count > 32)
917 count = 32;
918 if (copy_from_user(tmp, buffer, count))
919 return -EFAULT;
920 tmp[count] = 0;
921
922 label = tmp;
923 while(*label == ' ')
924 label++;
925 val = label;
926 while(*val && (*val != '=')) {
927 if (*val == ' ')
928 *val = 0;
929 val++;
930 }
931 if ((*val) == 0)
932 return -EINVAL;
933 *(val++) = 0;
934 while(*val == ' ')
935 val++;
936 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
937 if (pmu_kind == PMU_KEYLARGO_BASED &&
938 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
939 if (!strcmp(label, "lid_wakeup"))
940 option_lid_wakeup = ((*val) == '1');
941 #endif
942 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
943 int new_value;
944 new_value = ((*val) == '1');
945 if (new_value != option_server_mode)
946 pmu_set_server_mode(new_value);
947 }
948 return fcount;
949 }
950
951 static const struct file_operations pmu_options_proc_fops = {
952 .owner = THIS_MODULE,
953 .open = pmu_options_proc_open,
954 .read = seq_read,
955 .llseek = seq_lseek,
956 .release = single_release,
957 .write = pmu_options_proc_write,
958 };
959
960 #ifdef CONFIG_ADB
961 /* Send an ADB command */
962 static int pmu_send_request(struct adb_request *req, int sync)
963 {
964 int i, ret;
965
966 if ((vias == NULL) || (!pmu_fully_inited)) {
967 req->complete = 1;
968 return -ENXIO;
969 }
970
971 ret = -EINVAL;
972
973 switch (req->data[0]) {
974 case PMU_PACKET:
975 for (i = 0; i < req->nbytes - 1; ++i)
976 req->data[i] = req->data[i+1];
977 --req->nbytes;
978 if (pmu_data_len[req->data[0]][1] != 0) {
979 req->reply[0] = ADB_RET_OK;
980 req->reply_len = 1;
981 } else
982 req->reply_len = 0;
983 ret = pmu_queue_request(req);
984 break;
985 case CUDA_PACKET:
986 switch (req->data[1]) {
987 case CUDA_GET_TIME:
988 if (req->nbytes != 2)
989 break;
990 req->data[0] = PMU_READ_RTC;
991 req->nbytes = 1;
992 req->reply_len = 3;
993 req->reply[0] = CUDA_PACKET;
994 req->reply[1] = 0;
995 req->reply[2] = CUDA_GET_TIME;
996 ret = pmu_queue_request(req);
997 break;
998 case CUDA_SET_TIME:
999 if (req->nbytes != 6)
1000 break;
1001 req->data[0] = PMU_SET_RTC;
1002 req->nbytes = 5;
1003 for (i = 1; i <= 4; ++i)
1004 req->data[i] = req->data[i+1];
1005 req->reply_len = 3;
1006 req->reply[0] = CUDA_PACKET;
1007 req->reply[1] = 0;
1008 req->reply[2] = CUDA_SET_TIME;
1009 ret = pmu_queue_request(req);
1010 break;
1011 }
1012 break;
1013 case ADB_PACKET:
1014 if (!pmu_has_adb)
1015 return -ENXIO;
1016 for (i = req->nbytes - 1; i > 1; --i)
1017 req->data[i+2] = req->data[i];
1018 req->data[3] = req->nbytes - 2;
1019 req->data[2] = pmu_adb_flags;
1020 /*req->data[1] = req->data[1];*/
1021 req->data[0] = PMU_ADB_CMD;
1022 req->nbytes += 2;
1023 req->reply_expected = 1;
1024 req->reply_len = 0;
1025 ret = pmu_queue_request(req);
1026 break;
1027 }
1028 if (ret) {
1029 req->complete = 1;
1030 return ret;
1031 }
1032
1033 if (sync)
1034 while (!req->complete)
1035 pmu_poll();
1036
1037 return 0;
1038 }
1039
1040 /* Enable/disable autopolling */
1041 static int __pmu_adb_autopoll(int devs)
1042 {
1043 struct adb_request req;
1044
1045 if (devs) {
1046 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1047 adb_dev_map >> 8, adb_dev_map);
1048 pmu_adb_flags = 2;
1049 } else {
1050 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1051 pmu_adb_flags = 0;
1052 }
1053 while (!req.complete)
1054 pmu_poll();
1055 return 0;
1056 }
1057
1058 static int pmu_adb_autopoll(int devs)
1059 {
1060 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1061 return -ENXIO;
1062
1063 adb_dev_map = devs;
1064 return __pmu_adb_autopoll(devs);
1065 }
1066
1067 /* Reset the ADB bus */
1068 static int pmu_adb_reset_bus(void)
1069 {
1070 struct adb_request req;
1071 int save_autopoll = adb_dev_map;
1072
1073 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1074 return -ENXIO;
1075
1076 /* anyone got a better idea?? */
1077 __pmu_adb_autopoll(0);
1078
1079 req.nbytes = 4;
1080 req.done = NULL;
1081 req.data[0] = PMU_ADB_CMD;
1082 req.data[1] = ADB_BUSRESET;
1083 req.data[2] = 0;
1084 req.data[3] = 0;
1085 req.data[4] = 0;
1086 req.reply_len = 0;
1087 req.reply_expected = 1;
1088 if (pmu_queue_request(&req) != 0) {
1089 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1090 return -EIO;
1091 }
1092 pmu_wait_complete(&req);
1093
1094 if (save_autopoll != 0)
1095 __pmu_adb_autopoll(save_autopoll);
1096
1097 return 0;
1098 }
1099 #endif /* CONFIG_ADB */
1100
1101 /* Construct and send a pmu request */
1102 int
1103 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1104 int nbytes, ...)
1105 {
1106 va_list list;
1107 int i;
1108
1109 if (vias == NULL)
1110 return -ENXIO;
1111
1112 if (nbytes < 0 || nbytes > 32) {
1113 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1114 req->complete = 1;
1115 return -EINVAL;
1116 }
1117 req->nbytes = nbytes;
1118 req->done = done;
1119 va_start(list, nbytes);
1120 for (i = 0; i < nbytes; ++i)
1121 req->data[i] = va_arg(list, int);
1122 va_end(list);
1123 req->reply_len = 0;
1124 req->reply_expected = 0;
1125 return pmu_queue_request(req);
1126 }
1127
1128 int
1129 pmu_queue_request(struct adb_request *req)
1130 {
1131 unsigned long flags;
1132 int nsend;
1133
1134 if (via == NULL) {
1135 req->complete = 1;
1136 return -ENXIO;
1137 }
1138 if (req->nbytes <= 0) {
1139 req->complete = 1;
1140 return 0;
1141 }
1142 nsend = pmu_data_len[req->data[0]][0];
1143 if (nsend >= 0 && req->nbytes != nsend + 1) {
1144 req->complete = 1;
1145 return -EINVAL;
1146 }
1147
1148 req->next = NULL;
1149 req->sent = 0;
1150 req->complete = 0;
1151
1152 spin_lock_irqsave(&pmu_lock, flags);
1153 if (current_req != 0) {
1154 last_req->next = req;
1155 last_req = req;
1156 } else {
1157 current_req = req;
1158 last_req = req;
1159 if (pmu_state == idle)
1160 pmu_start();
1161 }
1162 spin_unlock_irqrestore(&pmu_lock, flags);
1163
1164 return 0;
1165 }
1166
1167 static inline void
1168 wait_for_ack(void)
1169 {
1170 /* Sightly increased the delay, I had one occurrence of the message
1171 * reported
1172 */
1173 int timeout = 4000;
1174 while ((in_8(&via[B]) & TACK) == 0) {
1175 if (--timeout < 0) {
1176 printk(KERN_ERR "PMU not responding (!ack)\n");
1177 return;
1178 }
1179 udelay(10);
1180 }
1181 }
1182
1183 /* New PMU seems to be very sensitive to those timings, so we make sure
1184 * PCI is flushed immediately */
1185 static inline void
1186 send_byte(int x)
1187 {
1188 volatile unsigned char __iomem *v = via;
1189
1190 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1191 out_8(&v[SR], x);
1192 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
1193 (void)in_8(&v[B]);
1194 }
1195
1196 static inline void
1197 recv_byte(void)
1198 {
1199 volatile unsigned char __iomem *v = via;
1200
1201 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1202 in_8(&v[SR]); /* resets SR */
1203 out_8(&v[B], in_8(&v[B]) & ~TREQ);
1204 (void)in_8(&v[B]);
1205 }
1206
1207 static inline void
1208 pmu_done(struct adb_request *req)
1209 {
1210 void (*done)(struct adb_request *) = req->done;
1211 mb();
1212 req->complete = 1;
1213 /* Here, we assume that if the request has a done member, the
1214 * struct request will survive to setting req->complete to 1
1215 */
1216 if (done)
1217 (*done)(req);
1218 }
1219
1220 static void
1221 pmu_start(void)
1222 {
1223 struct adb_request *req;
1224
1225 /* assert pmu_state == idle */
1226 /* get the packet to send */
1227 req = current_req;
1228 if (req == 0 || pmu_state != idle
1229 || (/*req->reply_expected && */req_awaiting_reply))
1230 return;
1231
1232 pmu_state = sending;
1233 data_index = 1;
1234 data_len = pmu_data_len[req->data[0]][0];
1235
1236 /* Sounds safer to make sure ACK is high before writing. This helped
1237 * kill a problem with ADB and some iBooks
1238 */
1239 wait_for_ack();
1240 /* set the shift register to shift out and send a byte */
1241 send_byte(req->data[0]);
1242 }
1243
1244 void
1245 pmu_poll(void)
1246 {
1247 if (!via)
1248 return;
1249 if (disable_poll)
1250 return;
1251 via_pmu_interrupt(0, NULL);
1252 }
1253
1254 void
1255 pmu_poll_adb(void)
1256 {
1257 if (!via)
1258 return;
1259 if (disable_poll)
1260 return;
1261 /* Kicks ADB read when PMU is suspended */
1262 adb_int_pending = 1;
1263 do {
1264 via_pmu_interrupt(0, NULL);
1265 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1266 || req_awaiting_reply));
1267 }
1268
1269 void
1270 pmu_wait_complete(struct adb_request *req)
1271 {
1272 if (!via)
1273 return;
1274 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1275 via_pmu_interrupt(0, NULL);
1276 }
1277
1278 /* This function loops until the PMU is idle and prevents it from
1279 * anwsering to ADB interrupts. pmu_request can still be called.
1280 * This is done to avoid spurrious shutdowns when we know we'll have
1281 * interrupts switched off for a long time
1282 */
1283 void
1284 pmu_suspend(void)
1285 {
1286 unsigned long flags;
1287
1288 if (!via)
1289 return;
1290
1291 spin_lock_irqsave(&pmu_lock, flags);
1292 pmu_suspended++;
1293 if (pmu_suspended > 1) {
1294 spin_unlock_irqrestore(&pmu_lock, flags);
1295 return;
1296 }
1297
1298 do {
1299 spin_unlock_irqrestore(&pmu_lock, flags);
1300 if (req_awaiting_reply)
1301 adb_int_pending = 1;
1302 via_pmu_interrupt(0, NULL);
1303 spin_lock_irqsave(&pmu_lock, flags);
1304 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1305 if (gpio_irq >= 0)
1306 disable_irq_nosync(gpio_irq);
1307 out_8(&via[IER], CB1_INT | IER_CLR);
1308 spin_unlock_irqrestore(&pmu_lock, flags);
1309 break;
1310 }
1311 } while (1);
1312 }
1313
1314 void
1315 pmu_resume(void)
1316 {
1317 unsigned long flags;
1318
1319 if (!via || (pmu_suspended < 1))
1320 return;
1321
1322 spin_lock_irqsave(&pmu_lock, flags);
1323 pmu_suspended--;
1324 if (pmu_suspended > 0) {
1325 spin_unlock_irqrestore(&pmu_lock, flags);
1326 return;
1327 }
1328 adb_int_pending = 1;
1329 if (gpio_irq >= 0)
1330 enable_irq(gpio_irq);
1331 out_8(&via[IER], CB1_INT | IER_SET);
1332 spin_unlock_irqrestore(&pmu_lock, flags);
1333 pmu_poll();
1334 }
1335
1336 /* Interrupt data could be the result data from an ADB cmd */
1337 static void
1338 pmu_handle_data(unsigned char *data, int len)
1339 {
1340 unsigned char ints, pirq;
1341 int i = 0;
1342
1343 asleep = 0;
1344 if (drop_interrupts || len < 1) {
1345 adb_int_pending = 0;
1346 pmu_irq_stats[8]++;
1347 return;
1348 }
1349
1350 /* Get PMU interrupt mask */
1351 ints = data[0];
1352
1353 /* Record zero interrupts for stats */
1354 if (ints == 0)
1355 pmu_irq_stats[9]++;
1356
1357 /* Hack to deal with ADB autopoll flag */
1358 if (ints & PMU_INT_ADB)
1359 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1360
1361 next:
1362
1363 if (ints == 0) {
1364 if (i > pmu_irq_stats[10])
1365 pmu_irq_stats[10] = i;
1366 return;
1367 }
1368
1369 for (pirq = 0; pirq < 8; pirq++)
1370 if (ints & (1 << pirq))
1371 break;
1372 pmu_irq_stats[pirq]++;
1373 i++;
1374 ints &= ~(1 << pirq);
1375
1376 /* Note: for some reason, we get an interrupt with len=1,
1377 * data[0]==0 after each normal ADB interrupt, at least
1378 * on the Pismo. Still investigating... --BenH
1379 */
1380 if ((1 << pirq) & PMU_INT_ADB) {
1381 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1382 struct adb_request *req = req_awaiting_reply;
1383 if (req == 0) {
1384 printk(KERN_ERR "PMU: extra ADB reply\n");
1385 return;
1386 }
1387 req_awaiting_reply = NULL;
1388 if (len <= 2)
1389 req->reply_len = 0;
1390 else {
1391 memcpy(req->reply, data + 1, len - 1);
1392 req->reply_len = len - 1;
1393 }
1394 pmu_done(req);
1395 } else {
1396 if (len == 4 && data[1] == 0x2c) {
1397 extern int xmon_wants_key, xmon_adb_keycode;
1398 if (xmon_wants_key) {
1399 xmon_adb_keycode = data[2];
1400 return;
1401 }
1402 }
1403 #ifdef CONFIG_ADB
1404 /*
1405 * XXX On the [23]400 the PMU gives us an up
1406 * event for keycodes 0x74 or 0x75 when the PC
1407 * card eject buttons are released, so we
1408 * ignore those events.
1409 */
1410 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1411 && data[1] == 0x2c && data[3] == 0xff
1412 && (data[2] & ~1) == 0xf4))
1413 adb_input(data+1, len-1, 1);
1414 #endif /* CONFIG_ADB */
1415 }
1416 }
1417 /* Sound/brightness button pressed */
1418 else if ((1 << pirq) & PMU_INT_SNDBRT) {
1419 #ifdef CONFIG_PMAC_BACKLIGHT
1420 if (len == 3)
1421 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1422 #endif
1423 }
1424 /* Tick interrupt */
1425 else if ((1 << pirq) & PMU_INT_TICK) {
1426 /* Environement or tick interrupt, query batteries */
1427 if (pmu_battery_count) {
1428 if ((--query_batt_timer) == 0) {
1429 query_battery_state();
1430 query_batt_timer = BATTERY_POLLING_COUNT;
1431 }
1432 }
1433 }
1434 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1435 if (pmu_battery_count)
1436 query_battery_state();
1437 pmu_pass_intr(data, len);
1438 /* len == 6 is probably a bad check. But how do I
1439 * know what PMU versions send what events here? */
1440 if (len == 6) {
1441 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1442 via_pmu_event(PMU_EVT_LID, data[1]&1);
1443 }
1444 } else {
1445 pmu_pass_intr(data, len);
1446 }
1447 goto next;
1448 }
1449
1450 static struct adb_request*
1451 pmu_sr_intr(void)
1452 {
1453 struct adb_request *req;
1454 int bite = 0;
1455
1456 if (via[B] & TREQ) {
1457 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1458 out_8(&via[IFR], SR_INT);
1459 return NULL;
1460 }
1461 /* The ack may not yet be low when we get the interrupt */
1462 while ((in_8(&via[B]) & TACK) != 0)
1463 ;
1464
1465 /* if reading grab the byte, and reset the interrupt */
1466 if (pmu_state == reading || pmu_state == reading_intr)
1467 bite = in_8(&via[SR]);
1468
1469 /* reset TREQ and wait for TACK to go high */
1470 out_8(&via[B], in_8(&via[B]) | TREQ);
1471 wait_for_ack();
1472
1473 switch (pmu_state) {
1474 case sending:
1475 req = current_req;
1476 if (data_len < 0) {
1477 data_len = req->nbytes - 1;
1478 send_byte(data_len);
1479 break;
1480 }
1481 if (data_index <= data_len) {
1482 send_byte(req->data[data_index++]);
1483 break;
1484 }
1485 req->sent = 1;
1486 data_len = pmu_data_len[req->data[0]][1];
1487 if (data_len == 0) {
1488 pmu_state = idle;
1489 current_req = req->next;
1490 if (req->reply_expected)
1491 req_awaiting_reply = req;
1492 else
1493 return req;
1494 } else {
1495 pmu_state = reading;
1496 data_index = 0;
1497 reply_ptr = req->reply + req->reply_len;
1498 recv_byte();
1499 }
1500 break;
1501
1502 case intack:
1503 data_index = 0;
1504 data_len = -1;
1505 pmu_state = reading_intr;
1506 reply_ptr = interrupt_data[int_data_last];
1507 recv_byte();
1508 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1509 enable_irq(gpio_irq);
1510 gpio_irq_enabled = 1;
1511 }
1512 break;
1513
1514 case reading:
1515 case reading_intr:
1516 if (data_len == -1) {
1517 data_len = bite;
1518 if (bite > 32)
1519 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1520 } else if (data_index < 32) {
1521 reply_ptr[data_index++] = bite;
1522 }
1523 if (data_index < data_len) {
1524 recv_byte();
1525 break;
1526 }
1527
1528 if (pmu_state == reading_intr) {
1529 pmu_state = idle;
1530 int_data_state[int_data_last] = int_data_ready;
1531 interrupt_data_len[int_data_last] = data_len;
1532 } else {
1533 req = current_req;
1534 /*
1535 * For PMU sleep and freq change requests, we lock the
1536 * PMU until it's explicitly unlocked. This avoids any
1537 * spurrious event polling getting in
1538 */
1539 current_req = req->next;
1540 req->reply_len += data_index;
1541 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1542 pmu_state = locked;
1543 else
1544 pmu_state = idle;
1545 return req;
1546 }
1547 break;
1548
1549 default:
1550 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1551 pmu_state);
1552 }
1553 return NULL;
1554 }
1555
1556 static irqreturn_t
1557 via_pmu_interrupt(int irq, void *arg)
1558 {
1559 unsigned long flags;
1560 int intr;
1561 int nloop = 0;
1562 int int_data = -1;
1563 struct adb_request *req = NULL;
1564 int handled = 0;
1565
1566 /* This is a bit brutal, we can probably do better */
1567 spin_lock_irqsave(&pmu_lock, flags);
1568 ++disable_poll;
1569
1570 for (;;) {
1571 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1572 if (intr == 0)
1573 break;
1574 handled = 1;
1575 if (++nloop > 1000) {
1576 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1577 "intr=%x, ier=%x pmu_state=%d\n",
1578 intr, in_8(&via[IER]), pmu_state);
1579 break;
1580 }
1581 out_8(&via[IFR], intr);
1582 if (intr & CB1_INT) {
1583 adb_int_pending = 1;
1584 pmu_irq_stats[0]++;
1585 }
1586 if (intr & SR_INT) {
1587 req = pmu_sr_intr();
1588 if (req)
1589 break;
1590 }
1591 }
1592
1593 recheck:
1594 if (pmu_state == idle) {
1595 if (adb_int_pending) {
1596 if (int_data_state[0] == int_data_empty)
1597 int_data_last = 0;
1598 else if (int_data_state[1] == int_data_empty)
1599 int_data_last = 1;
1600 else
1601 goto no_free_slot;
1602 pmu_state = intack;
1603 int_data_state[int_data_last] = int_data_fill;
1604 /* Sounds safer to make sure ACK is high before writing.
1605 * This helped kill a problem with ADB and some iBooks
1606 */
1607 wait_for_ack();
1608 send_byte(PMU_INT_ACK);
1609 adb_int_pending = 0;
1610 } else if (current_req)
1611 pmu_start();
1612 }
1613 no_free_slot:
1614 /* Mark the oldest buffer for flushing */
1615 if (int_data_state[!int_data_last] == int_data_ready) {
1616 int_data_state[!int_data_last] = int_data_flush;
1617 int_data = !int_data_last;
1618 } else if (int_data_state[int_data_last] == int_data_ready) {
1619 int_data_state[int_data_last] = int_data_flush;
1620 int_data = int_data_last;
1621 }
1622 --disable_poll;
1623 spin_unlock_irqrestore(&pmu_lock, flags);
1624
1625 /* Deal with completed PMU requests outside of the lock */
1626 if (req) {
1627 pmu_done(req);
1628 req = NULL;
1629 }
1630
1631 /* Deal with interrupt datas outside of the lock */
1632 if (int_data >= 0) {
1633 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1634 spin_lock_irqsave(&pmu_lock, flags);
1635 ++disable_poll;
1636 int_data_state[int_data] = int_data_empty;
1637 int_data = -1;
1638 goto recheck;
1639 }
1640
1641 return IRQ_RETVAL(handled);
1642 }
1643
1644 void
1645 pmu_unlock(void)
1646 {
1647 unsigned long flags;
1648
1649 spin_lock_irqsave(&pmu_lock, flags);
1650 if (pmu_state == locked)
1651 pmu_state = idle;
1652 adb_int_pending = 1;
1653 spin_unlock_irqrestore(&pmu_lock, flags);
1654 }
1655
1656
1657 static irqreturn_t
1658 gpio1_interrupt(int irq, void *arg)
1659 {
1660 unsigned long flags;
1661
1662 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1663 spin_lock_irqsave(&pmu_lock, flags);
1664 if (gpio_irq_enabled > 0) {
1665 disable_irq_nosync(gpio_irq);
1666 gpio_irq_enabled = 0;
1667 }
1668 pmu_irq_stats[1]++;
1669 adb_int_pending = 1;
1670 spin_unlock_irqrestore(&pmu_lock, flags);
1671 via_pmu_interrupt(0, NULL);
1672 return IRQ_HANDLED;
1673 }
1674 return IRQ_NONE;
1675 }
1676
1677 void
1678 pmu_enable_irled(int on)
1679 {
1680 struct adb_request req;
1681
1682 if (vias == NULL)
1683 return ;
1684 if (pmu_kind == PMU_KEYLARGO_BASED)
1685 return ;
1686
1687 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1688 (on ? PMU_POW_ON : PMU_POW_OFF));
1689 pmu_wait_complete(&req);
1690 }
1691
1692 void
1693 pmu_restart(void)
1694 {
1695 struct adb_request req;
1696
1697 if (via == NULL)
1698 return;
1699
1700 local_irq_disable();
1701
1702 drop_interrupts = 1;
1703
1704 if (pmu_kind != PMU_KEYLARGO_BASED) {
1705 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1706 PMU_INT_TICK );
1707 while(!req.complete)
1708 pmu_poll();
1709 }
1710
1711 pmu_request(&req, NULL, 1, PMU_RESET);
1712 pmu_wait_complete(&req);
1713 for (;;)
1714 ;
1715 }
1716
1717 void
1718 pmu_shutdown(void)
1719 {
1720 struct adb_request req;
1721
1722 if (via == NULL)
1723 return;
1724
1725 local_irq_disable();
1726
1727 drop_interrupts = 1;
1728
1729 if (pmu_kind != PMU_KEYLARGO_BASED) {
1730 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1731 PMU_INT_TICK );
1732 pmu_wait_complete(&req);
1733 } else {
1734 /* Disable server mode on shutdown or we'll just
1735 * wake up again
1736 */
1737 pmu_set_server_mode(0);
1738 }
1739
1740 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1741 'M', 'A', 'T', 'T');
1742 pmu_wait_complete(&req);
1743 for (;;)
1744 ;
1745 }
1746
1747 int
1748 pmu_present(void)
1749 {
1750 return via != 0;
1751 }
1752
1753 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1754 /*
1755 * Put the powerbook to sleep.
1756 */
1757
1758 static u32 save_via[8];
1759
1760 static void
1761 save_via_state(void)
1762 {
1763 save_via[0] = in_8(&via[ANH]);
1764 save_via[1] = in_8(&via[DIRA]);
1765 save_via[2] = in_8(&via[B]);
1766 save_via[3] = in_8(&via[DIRB]);
1767 save_via[4] = in_8(&via[PCR]);
1768 save_via[5] = in_8(&via[ACR]);
1769 save_via[6] = in_8(&via[T1CL]);
1770 save_via[7] = in_8(&via[T1CH]);
1771 }
1772 static void
1773 restore_via_state(void)
1774 {
1775 out_8(&via[ANH], save_via[0]);
1776 out_8(&via[DIRA], save_via[1]);
1777 out_8(&via[B], save_via[2]);
1778 out_8(&via[DIRB], save_via[3]);
1779 out_8(&via[PCR], save_via[4]);
1780 out_8(&via[ACR], save_via[5]);
1781 out_8(&via[T1CL], save_via[6]);
1782 out_8(&via[T1CH], save_via[7]);
1783 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
1784 out_8(&via[IFR], 0x7f); /* clear IFR */
1785 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1786 }
1787
1788 #define GRACKLE_PM (1<<7)
1789 #define GRACKLE_DOZE (1<<5)
1790 #define GRACKLE_NAP (1<<4)
1791 #define GRACKLE_SLEEP (1<<3)
1792
1793 static int powerbook_sleep_grackle(void)
1794 {
1795 unsigned long save_l2cr;
1796 unsigned short pmcr1;
1797 struct adb_request req;
1798 struct pci_dev *grackle;
1799
1800 grackle = pci_get_bus_and_slot(0, 0);
1801 if (!grackle)
1802 return -ENODEV;
1803
1804 /* Turn off various things. Darwin does some retry tests here... */
1805 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1806 pmu_wait_complete(&req);
1807 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1808 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1809 pmu_wait_complete(&req);
1810
1811 /* For 750, save backside cache setting and disable it */
1812 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1813
1814 if (!__fake_sleep) {
1815 /* Ask the PMU to put us to sleep */
1816 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1817 pmu_wait_complete(&req);
1818 }
1819
1820 /* The VIA is supposed not to be restored correctly*/
1821 save_via_state();
1822 /* We shut down some HW */
1823 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1824
1825 pci_read_config_word(grackle, 0x70, &pmcr1);
1826 /* Apparently, MacOS uses NAP mode for Grackle ??? */
1827 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1828 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1829 pci_write_config_word(grackle, 0x70, pmcr1);
1830
1831 /* Call low-level ASM sleep handler */
1832 if (__fake_sleep)
1833 mdelay(5000);
1834 else
1835 low_sleep_handler();
1836
1837 /* We're awake again, stop grackle PM */
1838 pci_read_config_word(grackle, 0x70, &pmcr1);
1839 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1840 pci_write_config_word(grackle, 0x70, pmcr1);
1841
1842 pci_dev_put(grackle);
1843
1844 /* Make sure the PMU is idle */
1845 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1846 restore_via_state();
1847
1848 /* Restore L2 cache */
1849 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1850 _set_L2CR(save_l2cr);
1851
1852 /* Restore userland MMU context */
1853 switch_mmu_context(NULL, current->active_mm);
1854
1855 /* Power things up */
1856 pmu_unlock();
1857 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1858 pmu_wait_complete(&req);
1859 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1860 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1861 pmu_wait_complete(&req);
1862 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1863 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1864 pmu_wait_complete(&req);
1865
1866 return 0;
1867 }
1868
1869 static int
1870 powerbook_sleep_Core99(void)
1871 {
1872 unsigned long save_l2cr;
1873 unsigned long save_l3cr;
1874 struct adb_request req;
1875
1876 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1877 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1878 return -ENOSYS;
1879 }
1880
1881 if (num_online_cpus() > 1 || cpu_is_offline(0))
1882 return -EAGAIN;
1883
1884 /* Stop environment and ADB interrupts */
1885 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1886 pmu_wait_complete(&req);
1887
1888 /* Tell PMU what events will wake us up */
1889 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1890 0xff, 0xff);
1891 pmu_wait_complete(&req);
1892 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1893 0, PMU_PWR_WAKEUP_KEY |
1894 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1895 pmu_wait_complete(&req);
1896
1897 /* Save the state of the L2 and L3 caches */
1898 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
1899 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1900
1901 if (!__fake_sleep) {
1902 /* Ask the PMU to put us to sleep */
1903 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1904 pmu_wait_complete(&req);
1905 }
1906
1907 /* The VIA is supposed not to be restored correctly*/
1908 save_via_state();
1909
1910 /* Shut down various ASICs. There's a chance that we can no longer
1911 * talk to the PMU after this, so I moved it to _after_ sending the
1912 * sleep command to it. Still need to be checked.
1913 */
1914 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1915
1916 /* Call low-level ASM sleep handler */
1917 if (__fake_sleep)
1918 mdelay(5000);
1919 else
1920 low_sleep_handler();
1921
1922 /* Restore Apple core ASICs state */
1923 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1924
1925 /* Restore VIA */
1926 restore_via_state();
1927
1928 /* tweak LPJ before cpufreq is there */
1929 loops_per_jiffy *= 2;
1930
1931 /* Restore video */
1932 pmac_call_early_video_resume();
1933
1934 /* Restore L2 cache */
1935 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1936 _set_L2CR(save_l2cr);
1937 /* Restore L3 cache */
1938 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1939 _set_L3CR(save_l3cr);
1940
1941 /* Restore userland MMU context */
1942 switch_mmu_context(NULL, current->active_mm);
1943
1944 /* Tell PMU we are ready */
1945 pmu_unlock();
1946 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1947 pmu_wait_complete(&req);
1948 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1949 pmu_wait_complete(&req);
1950
1951 /* Restore LPJ, cpufreq will adjust the cpu frequency */
1952 loops_per_jiffy /= 2;
1953
1954 return 0;
1955 }
1956
1957 #define PB3400_MEM_CTRL 0xf8000000
1958 #define PB3400_MEM_CTRL_SLEEP 0x70
1959
1960 static void __iomem *pb3400_mem_ctrl;
1961
1962 static void powerbook_sleep_init_3400(void)
1963 {
1964 /* map in the memory controller registers */
1965 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1966 if (pb3400_mem_ctrl == NULL)
1967 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1968 }
1969
1970 static int powerbook_sleep_3400(void)
1971 {
1972 int i, x;
1973 unsigned int hid0;
1974 unsigned long msr;
1975 struct adb_request sleep_req;
1976 unsigned int __iomem *mem_ctrl_sleep;
1977
1978 if (pb3400_mem_ctrl == NULL)
1979 return -ENOMEM;
1980 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1981
1982 /* Set the memory controller to keep the memory refreshed
1983 while we're asleep */
1984 for (i = 0x403f; i >= 0x4000; --i) {
1985 out_be32(mem_ctrl_sleep, i);
1986 do {
1987 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1988 } while (x == 0);
1989 if (x >= 0x100)
1990 break;
1991 }
1992
1993 /* Ask the PMU to put us to sleep */
1994 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1995 pmu_wait_complete(&sleep_req);
1996 pmu_unlock();
1997
1998 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1999
2000 asleep = 1;
2001
2002 /* Put the CPU into sleep mode */
2003 hid0 = mfspr(SPRN_HID0);
2004 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2005 mtspr(SPRN_HID0, hid0);
2006 local_irq_enable();
2007 msr = mfmsr() | MSR_POW;
2008 while (asleep) {
2009 mb();
2010 mtmsr(msr);
2011 isync();
2012 }
2013 local_irq_disable();
2014
2015 /* OK, we're awake again, start restoring things */
2016 out_be32(mem_ctrl_sleep, 0x3f);
2017 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2018
2019 return 0;
2020 }
2021
2022 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2023
2024 /*
2025 * Support for /dev/pmu device
2026 */
2027 #define RB_SIZE 0x10
2028 struct pmu_private {
2029 struct list_head list;
2030 int rb_get;
2031 int rb_put;
2032 struct rb_entry {
2033 unsigned short len;
2034 unsigned char data[16];
2035 } rb_buf[RB_SIZE];
2036 wait_queue_head_t wait;
2037 spinlock_t lock;
2038 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2039 int backlight_locker;
2040 #endif
2041 };
2042
2043 static LIST_HEAD(all_pmu_pvt);
2044 static DEFINE_SPINLOCK(all_pvt_lock);
2045
2046 static void
2047 pmu_pass_intr(unsigned char *data, int len)
2048 {
2049 struct pmu_private *pp;
2050 struct list_head *list;
2051 int i;
2052 unsigned long flags;
2053
2054 if (len > sizeof(pp->rb_buf[0].data))
2055 len = sizeof(pp->rb_buf[0].data);
2056 spin_lock_irqsave(&all_pvt_lock, flags);
2057 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2058 pp = list_entry(list, struct pmu_private, list);
2059 spin_lock(&pp->lock);
2060 i = pp->rb_put + 1;
2061 if (i >= RB_SIZE)
2062 i = 0;
2063 if (i != pp->rb_get) {
2064 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2065 rp->len = len;
2066 memcpy(rp->data, data, len);
2067 pp->rb_put = i;
2068 wake_up_interruptible(&pp->wait);
2069 }
2070 spin_unlock(&pp->lock);
2071 }
2072 spin_unlock_irqrestore(&all_pvt_lock, flags);
2073 }
2074
2075 static int
2076 pmu_open(struct inode *inode, struct file *file)
2077 {
2078 struct pmu_private *pp;
2079 unsigned long flags;
2080
2081 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2082 if (pp == 0)
2083 return -ENOMEM;
2084 pp->rb_get = pp->rb_put = 0;
2085 spin_lock_init(&pp->lock);
2086 init_waitqueue_head(&pp->wait);
2087 mutex_lock(&pmu_info_proc_mutex);
2088 spin_lock_irqsave(&all_pvt_lock, flags);
2089 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2090 pp->backlight_locker = 0;
2091 #endif
2092 list_add(&pp->list, &all_pmu_pvt);
2093 spin_unlock_irqrestore(&all_pvt_lock, flags);
2094 file->private_data = pp;
2095 mutex_unlock(&pmu_info_proc_mutex);
2096 return 0;
2097 }
2098
2099 static ssize_t
2100 pmu_read(struct file *file, char __user *buf,
2101 size_t count, loff_t *ppos)
2102 {
2103 struct pmu_private *pp = file->private_data;
2104 DECLARE_WAITQUEUE(wait, current);
2105 unsigned long flags;
2106 int ret = 0;
2107
2108 if (count < 1 || pp == 0)
2109 return -EINVAL;
2110 if (!access_ok(VERIFY_WRITE, buf, count))
2111 return -EFAULT;
2112
2113 spin_lock_irqsave(&pp->lock, flags);
2114 add_wait_queue(&pp->wait, &wait);
2115 set_current_state(TASK_INTERRUPTIBLE);
2116
2117 for (;;) {
2118 ret = -EAGAIN;
2119 if (pp->rb_get != pp->rb_put) {
2120 int i = pp->rb_get;
2121 struct rb_entry *rp = &pp->rb_buf[i];
2122 ret = rp->len;
2123 spin_unlock_irqrestore(&pp->lock, flags);
2124 if (ret > count)
2125 ret = count;
2126 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2127 ret = -EFAULT;
2128 if (++i >= RB_SIZE)
2129 i = 0;
2130 spin_lock_irqsave(&pp->lock, flags);
2131 pp->rb_get = i;
2132 }
2133 if (ret >= 0)
2134 break;
2135 if (file->f_flags & O_NONBLOCK)
2136 break;
2137 ret = -ERESTARTSYS;
2138 if (signal_pending(current))
2139 break;
2140 spin_unlock_irqrestore(&pp->lock, flags);
2141 schedule();
2142 spin_lock_irqsave(&pp->lock, flags);
2143 }
2144 __set_current_state(TASK_RUNNING);
2145 remove_wait_queue(&pp->wait, &wait);
2146 spin_unlock_irqrestore(&pp->lock, flags);
2147
2148 return ret;
2149 }
2150
2151 static ssize_t
2152 pmu_write(struct file *file, const char __user *buf,
2153 size_t count, loff_t *ppos)
2154 {
2155 return 0;
2156 }
2157
2158 static unsigned int
2159 pmu_fpoll(struct file *filp, poll_table *wait)
2160 {
2161 struct pmu_private *pp = filp->private_data;
2162 unsigned int mask = 0;
2163 unsigned long flags;
2164
2165 if (pp == 0)
2166 return 0;
2167 poll_wait(filp, &pp->wait, wait);
2168 spin_lock_irqsave(&pp->lock, flags);
2169 if (pp->rb_get != pp->rb_put)
2170 mask |= POLLIN;
2171 spin_unlock_irqrestore(&pp->lock, flags);
2172 return mask;
2173 }
2174
2175 static int
2176 pmu_release(struct inode *inode, struct file *file)
2177 {
2178 struct pmu_private *pp = file->private_data;
2179 unsigned long flags;
2180
2181 if (pp != 0) {
2182 file->private_data = NULL;
2183 spin_lock_irqsave(&all_pvt_lock, flags);
2184 list_del(&pp->list);
2185 spin_unlock_irqrestore(&all_pvt_lock, flags);
2186
2187 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2188 if (pp->backlight_locker)
2189 pmac_backlight_enable();
2190 #endif
2191
2192 kfree(pp);
2193 }
2194 return 0;
2195 }
2196
2197 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2198 static void pmac_suspend_disable_irqs(void)
2199 {
2200 /* Call platform functions marked "on sleep" */
2201 pmac_pfunc_i2c_suspend();
2202 pmac_pfunc_base_suspend();
2203 }
2204
2205 static int powerbook_sleep(suspend_state_t state)
2206 {
2207 int error = 0;
2208
2209 /* Wait for completion of async requests */
2210 while (!batt_req.complete)
2211 pmu_poll();
2212
2213 /* Giveup the lazy FPU & vec so we don't have to back them
2214 * up from the low level code
2215 */
2216 enable_kernel_fp();
2217
2218 #ifdef CONFIG_ALTIVEC
2219 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2220 enable_kernel_altivec();
2221 #endif /* CONFIG_ALTIVEC */
2222
2223 switch (pmu_kind) {
2224 case PMU_OHARE_BASED:
2225 error = powerbook_sleep_3400();
2226 break;
2227 case PMU_HEATHROW_BASED:
2228 case PMU_PADDINGTON_BASED:
2229 error = powerbook_sleep_grackle();
2230 break;
2231 case PMU_KEYLARGO_BASED:
2232 error = powerbook_sleep_Core99();
2233 break;
2234 default:
2235 return -ENOSYS;
2236 }
2237
2238 if (error)
2239 return error;
2240
2241 mdelay(100);
2242
2243 return 0;
2244 }
2245
2246 static void pmac_suspend_enable_irqs(void)
2247 {
2248 /* Force a poll of ADB interrupts */
2249 adb_int_pending = 1;
2250 via_pmu_interrupt(0, NULL);
2251
2252 mdelay(10);
2253
2254 /* Call platform functions marked "on wake" */
2255 pmac_pfunc_base_resume();
2256 pmac_pfunc_i2c_resume();
2257 }
2258
2259 static int pmu_sleep_valid(suspend_state_t state)
2260 {
2261 return state == PM_SUSPEND_MEM
2262 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2263 }
2264
2265 static const struct platform_suspend_ops pmu_pm_ops = {
2266 .enter = powerbook_sleep,
2267 .valid = pmu_sleep_valid,
2268 };
2269
2270 static int register_pmu_pm_ops(void)
2271 {
2272 if (pmu_kind == PMU_OHARE_BASED)
2273 powerbook_sleep_init_3400();
2274 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2275 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2276 suspend_set_ops(&pmu_pm_ops);
2277
2278 return 0;
2279 }
2280
2281 device_initcall(register_pmu_pm_ops);
2282 #endif
2283
2284 static int pmu_ioctl(struct file *filp,
2285 u_int cmd, u_long arg)
2286 {
2287 __u32 __user *argp = (__u32 __user *)arg;
2288 int error = -EINVAL;
2289
2290 switch (cmd) {
2291 case PMU_IOC_SLEEP:
2292 if (!capable(CAP_SYS_ADMIN))
2293 return -EACCES;
2294 return pm_suspend(PM_SUSPEND_MEM);
2295 case PMU_IOC_CAN_SLEEP:
2296 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2297 return put_user(0, argp);
2298 else
2299 return put_user(1, argp);
2300
2301 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2302 /* Compatibility ioctl's for backlight */
2303 case PMU_IOC_GET_BACKLIGHT:
2304 {
2305 int brightness;
2306
2307 brightness = pmac_backlight_get_legacy_brightness();
2308 if (brightness < 0)
2309 return brightness;
2310 else
2311 return put_user(brightness, argp);
2312
2313 }
2314 case PMU_IOC_SET_BACKLIGHT:
2315 {
2316 int brightness;
2317
2318 error = get_user(brightness, argp);
2319 if (error)
2320 return error;
2321
2322 return pmac_backlight_set_legacy_brightness(brightness);
2323 }
2324 #ifdef CONFIG_INPUT_ADBHID
2325 case PMU_IOC_GRAB_BACKLIGHT: {
2326 struct pmu_private *pp = filp->private_data;
2327
2328 if (pp->backlight_locker)
2329 return 0;
2330
2331 pp->backlight_locker = 1;
2332 pmac_backlight_disable();
2333
2334 return 0;
2335 }
2336 #endif /* CONFIG_INPUT_ADBHID */
2337 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2338
2339 case PMU_IOC_GET_MODEL:
2340 return put_user(pmu_kind, argp);
2341 case PMU_IOC_HAS_ADB:
2342 return put_user(pmu_has_adb, argp);
2343 }
2344 return error;
2345 }
2346
2347 static long pmu_unlocked_ioctl(struct file *filp,
2348 u_int cmd, u_long arg)
2349 {
2350 int ret;
2351
2352 mutex_lock(&pmu_info_proc_mutex);
2353 ret = pmu_ioctl(filp, cmd, arg);
2354 mutex_unlock(&pmu_info_proc_mutex);
2355
2356 return ret;
2357 }
2358
2359 #ifdef CONFIG_COMPAT
2360 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2361 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2362 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t)
2363 #define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t)
2364 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t)
2365 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2366
2367 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2368 {
2369 switch (cmd) {
2370 case PMU_IOC_SLEEP:
2371 break;
2372 case PMU_IOC_GET_BACKLIGHT32:
2373 cmd = PMU_IOC_GET_BACKLIGHT;
2374 break;
2375 case PMU_IOC_SET_BACKLIGHT32:
2376 cmd = PMU_IOC_SET_BACKLIGHT;
2377 break;
2378 case PMU_IOC_GET_MODEL32:
2379 cmd = PMU_IOC_GET_MODEL;
2380 break;
2381 case PMU_IOC_HAS_ADB32:
2382 cmd = PMU_IOC_HAS_ADB;
2383 break;
2384 case PMU_IOC_CAN_SLEEP32:
2385 cmd = PMU_IOC_CAN_SLEEP;
2386 break;
2387 case PMU_IOC_GRAB_BACKLIGHT32:
2388 cmd = PMU_IOC_GRAB_BACKLIGHT;
2389 break;
2390 default:
2391 return -ENOIOCTLCMD;
2392 }
2393 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2394 }
2395 #endif
2396
2397 static const struct file_operations pmu_device_fops = {
2398 .read = pmu_read,
2399 .write = pmu_write,
2400 .poll = pmu_fpoll,
2401 .unlocked_ioctl = pmu_unlocked_ioctl,
2402 #ifdef CONFIG_COMPAT
2403 .compat_ioctl = compat_pmu_ioctl,
2404 #endif
2405 .open = pmu_open,
2406 .release = pmu_release,
2407 .llseek = noop_llseek,
2408 };
2409
2410 static struct miscdevice pmu_device = {
2411 PMU_MINOR, "pmu", &pmu_device_fops
2412 };
2413
2414 static int pmu_device_init(void)
2415 {
2416 if (!via)
2417 return 0;
2418 if (misc_register(&pmu_device) < 0)
2419 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2420 return 0;
2421 }
2422 device_initcall(pmu_device_init);
2423
2424
2425 #ifdef DEBUG_SLEEP
2426 static inline void
2427 polled_handshake(volatile unsigned char __iomem *via)
2428 {
2429 via[B] &= ~TREQ; eieio();
2430 while ((via[B] & TACK) != 0)
2431 ;
2432 via[B] |= TREQ; eieio();
2433 while ((via[B] & TACK) == 0)
2434 ;
2435 }
2436
2437 static inline void
2438 polled_send_byte(volatile unsigned char __iomem *via, int x)
2439 {
2440 via[ACR] |= SR_OUT | SR_EXT; eieio();
2441 via[SR] = x; eieio();
2442 polled_handshake(via);
2443 }
2444
2445 static inline int
2446 polled_recv_byte(volatile unsigned char __iomem *via)
2447 {
2448 int x;
2449
2450 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2451 x = via[SR]; eieio();
2452 polled_handshake(via);
2453 x = via[SR]; eieio();
2454 return x;
2455 }
2456
2457 int
2458 pmu_polled_request(struct adb_request *req)
2459 {
2460 unsigned long flags;
2461 int i, l, c;
2462 volatile unsigned char __iomem *v = via;
2463
2464 req->complete = 1;
2465 c = req->data[0];
2466 l = pmu_data_len[c][0];
2467 if (l >= 0 && req->nbytes != l + 1)
2468 return -EINVAL;
2469
2470 local_irq_save(flags);
2471 while (pmu_state != idle)
2472 pmu_poll();
2473
2474 while ((via[B] & TACK) == 0)
2475 ;
2476 polled_send_byte(v, c);
2477 if (l < 0) {
2478 l = req->nbytes - 1;
2479 polled_send_byte(v, l);
2480 }
2481 for (i = 1; i <= l; ++i)
2482 polled_send_byte(v, req->data[i]);
2483
2484 l = pmu_data_len[c][1];
2485 if (l < 0)
2486 l = polled_recv_byte(v);
2487 for (i = 0; i < l; ++i)
2488 req->reply[i + req->reply_len] = polled_recv_byte(v);
2489
2490 if (req->done)
2491 (*req->done)(req);
2492
2493 local_irq_restore(flags);
2494 return 0;
2495 }
2496
2497 /* N.B. This doesn't work on the 3400 */
2498 void pmu_blink(int n)
2499 {
2500 struct adb_request req;
2501
2502 memset(&req, 0, sizeof(req));
2503
2504 for (; n > 0; --n) {
2505 req.nbytes = 4;
2506 req.done = NULL;
2507 req.data[0] = 0xee;
2508 req.data[1] = 4;
2509 req.data[2] = 0;
2510 req.data[3] = 1;
2511 req.reply[0] = ADB_RET_OK;
2512 req.reply_len = 1;
2513 req.reply_expected = 0;
2514 pmu_polled_request(&req);
2515 mdelay(50);
2516 req.nbytes = 4;
2517 req.done = NULL;
2518 req.data[0] = 0xee;
2519 req.data[1] = 4;
2520 req.data[2] = 0;
2521 req.data[3] = 0;
2522 req.reply[0] = ADB_RET_OK;
2523 req.reply_len = 1;
2524 req.reply_expected = 0;
2525 pmu_polled_request(&req);
2526 mdelay(50);
2527 }
2528 mdelay(50);
2529 }
2530 #endif /* DEBUG_SLEEP */
2531
2532 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2533 int pmu_sys_suspended;
2534
2535 static int pmu_syscore_suspend(void)
2536 {
2537 /* Suspend PMU event interrupts */
2538 pmu_suspend();
2539 pmu_sys_suspended = 1;
2540
2541 #ifdef CONFIG_PMAC_BACKLIGHT
2542 /* Tell backlight code not to muck around with the chip anymore */
2543 pmu_backlight_set_sleep(1);
2544 #endif
2545
2546 return 0;
2547 }
2548
2549 static void pmu_syscore_resume(void)
2550 {
2551 struct adb_request req;
2552
2553 if (!pmu_sys_suspended)
2554 return;
2555
2556 /* Tell PMU we are ready */
2557 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2558 pmu_wait_complete(&req);
2559
2560 #ifdef CONFIG_PMAC_BACKLIGHT
2561 /* Tell backlight code it can use the chip again */
2562 pmu_backlight_set_sleep(0);
2563 #endif
2564 /* Resume PMU event interrupts */
2565 pmu_resume();
2566 pmu_sys_suspended = 0;
2567 }
2568
2569 static struct syscore_ops pmu_syscore_ops = {
2570 .suspend = pmu_syscore_suspend,
2571 .resume = pmu_syscore_resume,
2572 };
2573
2574 static int pmu_syscore_register(void)
2575 {
2576 register_syscore_ops(&pmu_syscore_ops);
2577
2578 return 0;
2579 }
2580 subsys_initcall(pmu_syscore_register);
2581 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2582
2583 EXPORT_SYMBOL(pmu_request);
2584 EXPORT_SYMBOL(pmu_queue_request);
2585 EXPORT_SYMBOL(pmu_poll);
2586 EXPORT_SYMBOL(pmu_poll_adb);
2587 EXPORT_SYMBOL(pmu_wait_complete);
2588 EXPORT_SYMBOL(pmu_suspend);
2589 EXPORT_SYMBOL(pmu_resume);
2590 EXPORT_SYMBOL(pmu_unlock);
2591 #if defined(CONFIG_PPC32)
2592 EXPORT_SYMBOL(pmu_enable_irled);
2593 EXPORT_SYMBOL(pmu_battery_count);
2594 EXPORT_SYMBOL(pmu_batteries);
2595 EXPORT_SYMBOL(pmu_power_flags);
2596 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2597
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