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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / macintosh / via-pmu.c
blob6cccd60c594e3ae3ee73a6cf6ee98ce9543eead4
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 <asm/prom.h>
50 #include <asm/machdep.h>
51 #include <asm/io.h>
52 #include <asm/pgtable.h>
53 #include <asm/system.h>
54 #include <asm/sections.h>
55 #include <asm/irq.h>
56 #include <asm/pmac_feature.h>
57 #include <asm/pmac_pfunc.h>
58 #include <asm/pmac_low_i2c.h>
59 #include <asm/uaccess.h>
60 #include <asm/mmu_context.h>
61 #include <asm/cputable.h>
62 #include <asm/time.h>
63 #include <asm/backlight.h>
64
65 #include "via-pmu-event.h"
66
67 /* Some compile options */
68 #undef DEBUG_SLEEP
69
70 /* Misc minor number allocated for /dev/pmu */
71 #define PMU_MINOR 154
72
73 /* How many iterations between battery polls */
74 #define BATTERY_POLLING_COUNT 2
75
76 static DEFINE_MUTEX(pmu_info_proc_mutex);
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;
144 static int pmu_has_adb;
145 static struct device_node *gpio_node;
146 static unsigned char __iomem *gpio_reg;
147 static int gpio_irq = NO_IRQ;
148 static int gpio_irq_enabled = -1;
149 static volatile int pmu_suspended;
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_SUSPEND) && defined(CONFIG_PPC32)
155 static int option_lid_wakeup = 1;
156 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
157 static unsigned long async_req_locks;
158 static unsigned int pmu_irq_stats[11];
159
160 static struct proc_dir_entry *proc_pmu_root;
161 static struct proc_dir_entry *proc_pmu_info;
162 static struct proc_dir_entry *proc_pmu_irqstats;
163 static struct proc_dir_entry *proc_pmu_options;
164 static int option_server_mode;
165
166 int pmu_battery_count;
167 int pmu_cur_battery;
168 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
169 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
170 static int query_batt_timer = BATTERY_POLLING_COUNT;
171 static struct adb_request batt_req;
172 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
173
174 int __fake_sleep;
175 int asleep;
176
177 #ifdef CONFIG_ADB
178 static int adb_dev_map;
179 static int pmu_adb_flags;
180
181 static int pmu_probe(void);
182 static int pmu_init(void);
183 static int pmu_send_request(struct adb_request *req, int sync);
184 static int pmu_adb_autopoll(int devs);
185 static int pmu_adb_reset_bus(void);
186 #endif /* CONFIG_ADB */
187
188 static int init_pmu(void);
189 static void pmu_start(void);
190 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
191 static irqreturn_t gpio1_interrupt(int irq, void *arg);
192 static const struct file_operations pmu_info_proc_fops;
193 static const struct file_operations pmu_irqstats_proc_fops;
194 static void pmu_pass_intr(unsigned char *data, int len);
195 static const struct file_operations pmu_battery_proc_fops;
196 static const struct file_operations pmu_options_proc_fops;
197
198 #ifdef CONFIG_ADB
199 struct adb_driver via_pmu_driver = {
200 "PMU",
201 pmu_probe,
202 pmu_init,
203 pmu_send_request,
204 pmu_adb_autopoll,
205 pmu_poll_adb,
206 pmu_adb_reset_bus
207 };
208 #endif /* CONFIG_ADB */
209
210 extern void low_sleep_handler(void);
211 extern void enable_kernel_altivec(void);
212 extern void enable_kernel_fp(void);
213
214 #ifdef DEBUG_SLEEP
215 int pmu_polled_request(struct adb_request *req);
216 void pmu_blink(int n);
217 #endif
218
219 /*
220 * This table indicates for each PMU opcode:
221 * - the number of data bytes to be sent with the command, or -1
222 * if a length byte should be sent,
223 * - the number of response bytes which the PMU will return, or
224 * -1 if it will send a length byte.
225 */
226 static const s8 pmu_data_len[256][2] = {
227 /* 0 1 2 3 4 5 6 7 */
228 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
229 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
230 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
231 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
232 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
233 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
234 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
235 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
236 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
237 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
238 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
239 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
240 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
241 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
242 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
243 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
244 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
245 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
246 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
247 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
248 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
249 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
250 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
251 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
252 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
253 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
254 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
255 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
256 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
257 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
258 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
259 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
260 };
261
262 static char *pbook_type[] = {
263 "Unknown PowerBook",
264 "PowerBook 2400/3400/3500(G3)",
265 "PowerBook G3 Series",
266 "1999 PowerBook G3",
267 "Core99"
268 };
269
270 int __init find_via_pmu(void)
271 {
272 u64 taddr;
273 const u32 *reg;
274
275 if (via != 0)
276 return 1;
277 vias = of_find_node_by_name(NULL, "via-pmu");
278 if (vias == NULL)
279 return 0;
280
281 reg = of_get_property(vias, "reg", NULL);
282 if (reg == NULL) {
283 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
284 goto fail;
285 }
286 taddr = of_translate_address(vias, reg);
287 if (taddr == OF_BAD_ADDR) {
288 printk(KERN_ERR "via-pmu: Can't translate address !\n");
289 goto fail;
290 }
291
292 spin_lock_init(&pmu_lock);
293
294 pmu_has_adb = 1;
295
296 pmu_intr_mask = PMU_INT_PCEJECT |
297 PMU_INT_SNDBRT |
298 PMU_INT_ADB |
299 PMU_INT_TICK;
300
301 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
302 || of_device_is_compatible(vias->parent, "ohare")))
303 pmu_kind = PMU_OHARE_BASED;
304 else if (of_device_is_compatible(vias->parent, "paddington"))
305 pmu_kind = PMU_PADDINGTON_BASED;
306 else if (of_device_is_compatible(vias->parent, "heathrow"))
307 pmu_kind = PMU_HEATHROW_BASED;
308 else if (of_device_is_compatible(vias->parent, "Keylargo")
309 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
310 struct device_node *gpiop;
311 struct device_node *adbp;
312 u64 gaddr = OF_BAD_ADDR;
313
314 pmu_kind = PMU_KEYLARGO_BASED;
315 adbp = of_find_node_by_type(NULL, "adb");
316 pmu_has_adb = (adbp != NULL);
317 of_node_put(adbp);
318 pmu_intr_mask = PMU_INT_PCEJECT |
319 PMU_INT_SNDBRT |
320 PMU_INT_ADB |
321 PMU_INT_TICK |
322 PMU_INT_ENVIRONMENT;
323
324 gpiop = of_find_node_by_name(NULL, "gpio");
325 if (gpiop) {
326 reg = of_get_property(gpiop, "reg", NULL);
327 if (reg)
328 gaddr = of_translate_address(gpiop, reg);
329 if (gaddr != OF_BAD_ADDR)
330 gpio_reg = ioremap(gaddr, 0x10);
331 }
332 if (gpio_reg == NULL) {
333 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
334 goto fail_gpio;
335 }
336 } else
337 pmu_kind = PMU_UNKNOWN;
338
339 via = ioremap(taddr, 0x2000);
340 if (via == NULL) {
341 printk(KERN_ERR "via-pmu: Can't map address !\n");
342 goto fail;
343 }
344
345 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
346 out_8(&via[IFR], 0x7f); /* clear IFR */
347
348 pmu_state = idle;
349
350 if (!init_pmu()) {
351 via = NULL;
352 return 0;
353 }
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 fail:
362 of_node_put(vias);
363 iounmap(gpio_reg);
364 gpio_reg = NULL;
365 fail_gpio:
366 vias = NULL;
367 return 0;
368 }
369
370 #ifdef CONFIG_ADB
371 static int pmu_probe(void)
372 {
373 return vias == NULL? -ENODEV: 0;
374 }
375
376 static int __init pmu_init(void)
377 {
378 if (vias == NULL)
379 return -ENODEV;
380 return 0;
381 }
382 #endif /* CONFIG_ADB */
383
384 /*
385 * We can't wait until pmu_init gets called, that happens too late.
386 * It happens after IDE and SCSI initialization, which can take a few
387 * seconds, and by that time the PMU could have given up on us and
388 * turned us off.
389 * Thus this is called with arch_initcall rather than device_initcall.
390 */
391 static int __init via_pmu_start(void)
392 {
393 unsigned int irq;
394
395 if (vias == NULL)
396 return -ENODEV;
397
398 batt_req.complete = 1;
399
400 irq = irq_of_parse_and_map(vias, 0);
401 if (irq == NO_IRQ) {
402 printk(KERN_ERR "via-pmu: can't map interrupt\n");
403 return -ENODEV;
404 }
405 /* We set IRQF_NO_SUSPEND because we don't want the interrupt
406 * to be disabled between the 2 passes of driver suspend, we
407 * control our own disabling for that one
408 */
409 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
410 "VIA-PMU", (void *)0)) {
411 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
412 return -ENODEV;
413 }
414
415 if (pmu_kind == PMU_KEYLARGO_BASED) {
416 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
417 if (gpio_node == NULL)
418 gpio_node = of_find_node_by_name(NULL,
419 "pmu-interrupt");
420 if (gpio_node)
421 gpio_irq = irq_of_parse_and_map(gpio_node, 0);
422
423 if (gpio_irq != NO_IRQ) {
424 if (request_irq(gpio_irq, gpio1_interrupt, IRQF_TIMER,
425 "GPIO1 ADB", (void *)0))
426 printk(KERN_ERR "pmu: can't get irq %d"
427 " (GPIO1)\n", gpio_irq);
428 else
429 gpio_irq_enabled = 1;
430 }
431 }
432
433 /* Enable interrupts */
434 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
435
436 pmu_fully_inited = 1;
437
438 /* Make sure PMU settle down before continuing. This is _very_ important
439 * since the IDE probe may shut interrupts down for quite a bit of time. If
440 * a PMU communication is pending while this happens, the PMU may timeout
441 * Not that on Core99 machines, the PMU keeps sending us environement
442 * messages, we should find a way to either fix IDE or make it call
443 * pmu_suspend() before masking interrupts. This can also happens while
444 * scolling with some fbdevs.
445 */
446 do {
447 pmu_poll();
448 } while (pmu_state != idle);
449
450 return 0;
451 }
452
453 arch_initcall(via_pmu_start);
454
455 /*
456 * This has to be done after pci_init, which is a subsys_initcall.
457 */
458 static int __init via_pmu_dev_init(void)
459 {
460 if (vias == NULL)
461 return -ENODEV;
462
463 #ifdef CONFIG_PMAC_BACKLIGHT
464 /* Initialize backlight */
465 pmu_backlight_init();
466 #endif
467
468 #ifdef CONFIG_PPC32
469 if (of_machine_is_compatible("AAPL,3400/2400") ||
470 of_machine_is_compatible("AAPL,3500")) {
471 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
472 NULL, PMAC_MB_INFO_MODEL, 0);
473 pmu_battery_count = 1;
474 if (mb == PMAC_TYPE_COMET)
475 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
476 else
477 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
478 } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
479 of_machine_is_compatible("PowerBook1,1")) {
480 pmu_battery_count = 2;
481 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
482 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
483 } else {
484 struct device_node* prim =
485 of_find_node_by_name(NULL, "power-mgt");
486 const u32 *prim_info = NULL;
487 if (prim)
488 prim_info = of_get_property(prim, "prim-info", NULL);
489 if (prim_info) {
490 /* Other stuffs here yet unknown */
491 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
492 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
493 if (pmu_battery_count > 1)
494 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
495 }
496 of_node_put(prim);
497 }
498 #endif /* CONFIG_PPC32 */
499
500 /* Create /proc/pmu */
501 proc_pmu_root = proc_mkdir("pmu", NULL);
502 if (proc_pmu_root) {
503 long i;
504
505 for (i=0; i<pmu_battery_count; i++) {
506 char title[16];
507 sprintf(title, "battery_%ld", i);
508 proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
509 &pmu_battery_proc_fops, (void *)i);
510 }
511
512 proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
513 proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
514 &pmu_irqstats_proc_fops);
515 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
516 &pmu_options_proc_fops);
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);
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 pmu_info_proc_show(struct seq_file *m, void *v)
797 {
798 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
799 seq_printf(m, "PMU firmware version : %02x\n", pmu_version);
800 seq_printf(m, "AC Power : %d\n",
801 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
802 seq_printf(m, "Battery count : %d\n", pmu_battery_count);
803
804 return 0;
805 }
806
807 static int pmu_info_proc_open(struct inode *inode, struct file *file)
808 {
809 return single_open(file, pmu_info_proc_show, NULL);
810 }
811
812 static const struct file_operations pmu_info_proc_fops = {
813 .owner = THIS_MODULE,
814 .open = pmu_info_proc_open,
815 .read = seq_read,
816 .llseek = seq_lseek,
817 .release = single_release,
818 };
819
820 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
821 {
822 int i;
823 static const char *irq_names[] = {
824 "Total CB1 triggered events",
825 "Total GPIO1 triggered events",
826 "PC-Card eject button",
827 "Sound/Brightness button",
828 "ADB message",
829 "Battery state change",
830 "Environment interrupt",
831 "Tick timer",
832 "Ghost interrupt (zero len)",
833 "Empty interrupt (empty mask)",
834 "Max irqs in a row"
835 };
836
837 for (i=0; i<11; i++) {
838 seq_printf(m, " %2u: %10u (%s)\n",
839 i, pmu_irq_stats[i], irq_names[i]);
840 }
841 return 0;
842 }
843
844 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
845 {
846 return single_open(file, pmu_irqstats_proc_show, NULL);
847 }
848
849 static const struct file_operations pmu_irqstats_proc_fops = {
850 .owner = THIS_MODULE,
851 .open = pmu_irqstats_proc_open,
852 .read = seq_read,
853 .llseek = seq_lseek,
854 .release = single_release,
855 };
856
857 static int pmu_battery_proc_show(struct seq_file *m, void *v)
858 {
859 long batnum = (long)m->private;
860
861 seq_putc(m, '\n');
862 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags);
863 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge);
864 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
865 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage);
866 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage);
867 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining);
868 return 0;
869 }
870
871 static int pmu_battery_proc_open(struct inode *inode, struct file *file)
872 {
873 return single_open(file, pmu_battery_proc_show, PDE(inode)->data);
874 }
875
876 static const struct file_operations pmu_battery_proc_fops = {
877 .owner = THIS_MODULE,
878 .open = pmu_battery_proc_open,
879 .read = seq_read,
880 .llseek = seq_lseek,
881 .release = single_release,
882 };
883
884 static int pmu_options_proc_show(struct seq_file *m, void *v)
885 {
886 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
887 if (pmu_kind == PMU_KEYLARGO_BASED &&
888 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
889 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
890 #endif
891 if (pmu_kind == PMU_KEYLARGO_BASED)
892 seq_printf(m, "server_mode=%d\n", option_server_mode);
893
894 return 0;
895 }
896
897 static int pmu_options_proc_open(struct inode *inode, struct file *file)
898 {
899 return single_open(file, pmu_options_proc_show, NULL);
900 }
901
902 static ssize_t pmu_options_proc_write(struct file *file,
903 const char __user *buffer, size_t count, loff_t *pos)
904 {
905 char tmp[33];
906 char *label, *val;
907 size_t fcount = count;
908
909 if (!count)
910 return -EINVAL;
911 if (count > 32)
912 count = 32;
913 if (copy_from_user(tmp, buffer, count))
914 return -EFAULT;
915 tmp[count] = 0;
916
917 label = tmp;
918 while(*label == ' ')
919 label++;
920 val = label;
921 while(*val && (*val != '=')) {
922 if (*val == ' ')
923 *val = 0;
924 val++;
925 }
926 if ((*val) == 0)
927 return -EINVAL;
928 *(val++) = 0;
929 while(*val == ' ')
930 val++;
931 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
932 if (pmu_kind == PMU_KEYLARGO_BASED &&
933 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
934 if (!strcmp(label, "lid_wakeup"))
935 option_lid_wakeup = ((*val) == '1');
936 #endif
937 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
938 int new_value;
939 new_value = ((*val) == '1');
940 if (new_value != option_server_mode)
941 pmu_set_server_mode(new_value);
942 }
943 return fcount;
944 }
945
946 static const struct file_operations pmu_options_proc_fops = {
947 .owner = THIS_MODULE,
948 .open = pmu_options_proc_open,
949 .read = seq_read,
950 .llseek = seq_lseek,
951 .release = single_release,
952 .write = pmu_options_proc_write,
953 };
954
955 #ifdef CONFIG_ADB
956 /* Send an ADB command */
957 static int pmu_send_request(struct adb_request *req, int sync)
958 {
959 int i, ret;
960
961 if ((vias == NULL) || (!pmu_fully_inited)) {
962 req->complete = 1;
963 return -ENXIO;
964 }
965
966 ret = -EINVAL;
967
968 switch (req->data[0]) {
969 case PMU_PACKET:
970 for (i = 0; i < req->nbytes - 1; ++i)
971 req->data[i] = req->data[i+1];
972 --req->nbytes;
973 if (pmu_data_len[req->data[0]][1] != 0) {
974 req->reply[0] = ADB_RET_OK;
975 req->reply_len = 1;
976 } else
977 req->reply_len = 0;
978 ret = pmu_queue_request(req);
979 break;
980 case CUDA_PACKET:
981 switch (req->data[1]) {
982 case CUDA_GET_TIME:
983 if (req->nbytes != 2)
984 break;
985 req->data[0] = PMU_READ_RTC;
986 req->nbytes = 1;
987 req->reply_len = 3;
988 req->reply[0] = CUDA_PACKET;
989 req->reply[1] = 0;
990 req->reply[2] = CUDA_GET_TIME;
991 ret = pmu_queue_request(req);
992 break;
993 case CUDA_SET_TIME:
994 if (req->nbytes != 6)
995 break;
996 req->data[0] = PMU_SET_RTC;
997 req->nbytes = 5;
998 for (i = 1; i <= 4; ++i)
999 req->data[i] = req->data[i+1];
1000 req->reply_len = 3;
1001 req->reply[0] = CUDA_PACKET;
1002 req->reply[1] = 0;
1003 req->reply[2] = CUDA_SET_TIME;
1004 ret = pmu_queue_request(req);
1005 break;
1006 }
1007 break;
1008 case ADB_PACKET:
1009 if (!pmu_has_adb)
1010 return -ENXIO;
1011 for (i = req->nbytes - 1; i > 1; --i)
1012 req->data[i+2] = req->data[i];
1013 req->data[3] = req->nbytes - 2;
1014 req->data[2] = pmu_adb_flags;
1015 /*req->data[1] = req->data[1];*/
1016 req->data[0] = PMU_ADB_CMD;
1017 req->nbytes += 2;
1018 req->reply_expected = 1;
1019 req->reply_len = 0;
1020 ret = pmu_queue_request(req);
1021 break;
1022 }
1023 if (ret) {
1024 req->complete = 1;
1025 return ret;
1026 }
1027
1028 if (sync)
1029 while (!req->complete)
1030 pmu_poll();
1031
1032 return 0;
1033 }
1034
1035 /* Enable/disable autopolling */
1036 static int __pmu_adb_autopoll(int devs)
1037 {
1038 struct adb_request req;
1039
1040 if (devs) {
1041 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1042 adb_dev_map >> 8, adb_dev_map);
1043 pmu_adb_flags = 2;
1044 } else {
1045 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1046 pmu_adb_flags = 0;
1047 }
1048 while (!req.complete)
1049 pmu_poll();
1050 return 0;
1051 }
1052
1053 static int pmu_adb_autopoll(int devs)
1054 {
1055 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1056 return -ENXIO;
1057
1058 adb_dev_map = devs;
1059 return __pmu_adb_autopoll(devs);
1060 }
1061
1062 /* Reset the ADB bus */
1063 static int pmu_adb_reset_bus(void)
1064 {
1065 struct adb_request req;
1066 int save_autopoll = adb_dev_map;
1067
1068 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1069 return -ENXIO;
1070
1071 /* anyone got a better idea?? */
1072 __pmu_adb_autopoll(0);
1073
1074 req.nbytes = 4;
1075 req.done = NULL;
1076 req.data[0] = PMU_ADB_CMD;
1077 req.data[1] = ADB_BUSRESET;
1078 req.data[2] = 0;
1079 req.data[3] = 0;
1080 req.data[4] = 0;
1081 req.reply_len = 0;
1082 req.reply_expected = 1;
1083 if (pmu_queue_request(&req) != 0) {
1084 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1085 return -EIO;
1086 }
1087 pmu_wait_complete(&req);
1088
1089 if (save_autopoll != 0)
1090 __pmu_adb_autopoll(save_autopoll);
1091
1092 return 0;
1093 }
1094 #endif /* CONFIG_ADB */
1095
1096 /* Construct and send a pmu request */
1097 int
1098 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1099 int nbytes, ...)
1100 {
1101 va_list list;
1102 int i;
1103
1104 if (vias == NULL)
1105 return -ENXIO;
1106
1107 if (nbytes < 0 || nbytes > 32) {
1108 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1109 req->complete = 1;
1110 return -EINVAL;
1111 }
1112 req->nbytes = nbytes;
1113 req->done = done;
1114 va_start(list, nbytes);
1115 for (i = 0; i < nbytes; ++i)
1116 req->data[i] = va_arg(list, int);
1117 va_end(list);
1118 req->reply_len = 0;
1119 req->reply_expected = 0;
1120 return pmu_queue_request(req);
1121 }
1122
1123 int
1124 pmu_queue_request(struct adb_request *req)
1125 {
1126 unsigned long flags;
1127 int nsend;
1128
1129 if (via == NULL) {
1130 req->complete = 1;
1131 return -ENXIO;
1132 }
1133 if (req->nbytes <= 0) {
1134 req->complete = 1;
1135 return 0;
1136 }
1137 nsend = pmu_data_len[req->data[0]][0];
1138 if (nsend >= 0 && req->nbytes != nsend + 1) {
1139 req->complete = 1;
1140 return -EINVAL;
1141 }
1142
1143 req->next = NULL;
1144 req->sent = 0;
1145 req->complete = 0;
1146
1147 spin_lock_irqsave(&pmu_lock, flags);
1148 if (current_req != 0) {
1149 last_req->next = req;
1150 last_req = req;
1151 } else {
1152 current_req = req;
1153 last_req = req;
1154 if (pmu_state == idle)
1155 pmu_start();
1156 }
1157 spin_unlock_irqrestore(&pmu_lock, flags);
1158
1159 return 0;
1160 }
1161
1162 static inline void
1163 wait_for_ack(void)
1164 {
1165 /* Sightly increased the delay, I had one occurrence of the message
1166 * reported
1167 */
1168 int timeout = 4000;
1169 while ((in_8(&via[B]) & TACK) == 0) {
1170 if (--timeout < 0) {
1171 printk(KERN_ERR "PMU not responding (!ack)\n");
1172 return;
1173 }
1174 udelay(10);
1175 }
1176 }
1177
1178 /* New PMU seems to be very sensitive to those timings, so we make sure
1179 * PCI is flushed immediately */
1180 static inline void
1181 send_byte(int x)
1182 {
1183 volatile unsigned char __iomem *v = via;
1184
1185 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1186 out_8(&v[SR], x);
1187 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
1188 (void)in_8(&v[B]);
1189 }
1190
1191 static inline void
1192 recv_byte(void)
1193 {
1194 volatile unsigned char __iomem *v = via;
1195
1196 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1197 in_8(&v[SR]); /* resets SR */
1198 out_8(&v[B], in_8(&v[B]) & ~TREQ);
1199 (void)in_8(&v[B]);
1200 }
1201
1202 static inline void
1203 pmu_done(struct adb_request *req)
1204 {
1205 void (*done)(struct adb_request *) = req->done;
1206 mb();
1207 req->complete = 1;
1208 /* Here, we assume that if the request has a done member, the
1209 * struct request will survive to setting req->complete to 1
1210 */
1211 if (done)
1212 (*done)(req);
1213 }
1214
1215 static void
1216 pmu_start(void)
1217 {
1218 struct adb_request *req;
1219
1220 /* assert pmu_state == idle */
1221 /* get the packet to send */
1222 req = current_req;
1223 if (req == 0 || pmu_state != idle
1224 || (/*req->reply_expected && */req_awaiting_reply))
1225 return;
1226
1227 pmu_state = sending;
1228 data_index = 1;
1229 data_len = pmu_data_len[req->data[0]][0];
1230
1231 /* Sounds safer to make sure ACK is high before writing. This helped
1232 * kill a problem with ADB and some iBooks
1233 */
1234 wait_for_ack();
1235 /* set the shift register to shift out and send a byte */
1236 send_byte(req->data[0]);
1237 }
1238
1239 void
1240 pmu_poll(void)
1241 {
1242 if (!via)
1243 return;
1244 if (disable_poll)
1245 return;
1246 via_pmu_interrupt(0, NULL);
1247 }
1248
1249 void
1250 pmu_poll_adb(void)
1251 {
1252 if (!via)
1253 return;
1254 if (disable_poll)
1255 return;
1256 /* Kicks ADB read when PMU is suspended */
1257 adb_int_pending = 1;
1258 do {
1259 via_pmu_interrupt(0, NULL);
1260 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1261 || req_awaiting_reply));
1262 }
1263
1264 void
1265 pmu_wait_complete(struct adb_request *req)
1266 {
1267 if (!via)
1268 return;
1269 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1270 via_pmu_interrupt(0, NULL);
1271 }
1272
1273 /* This function loops until the PMU is idle and prevents it from
1274 * anwsering to ADB interrupts. pmu_request can still be called.
1275 * This is done to avoid spurrious shutdowns when we know we'll have
1276 * interrupts switched off for a long time
1277 */
1278 void
1279 pmu_suspend(void)
1280 {
1281 unsigned long flags;
1282
1283 if (!via)
1284 return;
1285
1286 spin_lock_irqsave(&pmu_lock, flags);
1287 pmu_suspended++;
1288 if (pmu_suspended > 1) {
1289 spin_unlock_irqrestore(&pmu_lock, flags);
1290 return;
1291 }
1292
1293 do {
1294 spin_unlock_irqrestore(&pmu_lock, flags);
1295 if (req_awaiting_reply)
1296 adb_int_pending = 1;
1297 via_pmu_interrupt(0, NULL);
1298 spin_lock_irqsave(&pmu_lock, flags);
1299 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1300 if (gpio_irq >= 0)
1301 disable_irq_nosync(gpio_irq);
1302 out_8(&via[IER], CB1_INT | IER_CLR);
1303 spin_unlock_irqrestore(&pmu_lock, flags);
1304 break;
1305 }
1306 } while (1);
1307 }
1308
1309 void
1310 pmu_resume(void)
1311 {
1312 unsigned long flags;
1313
1314 if (!via || (pmu_suspended < 1))
1315 return;
1316
1317 spin_lock_irqsave(&pmu_lock, flags);
1318 pmu_suspended--;
1319 if (pmu_suspended > 0) {
1320 spin_unlock_irqrestore(&pmu_lock, flags);
1321 return;
1322 }
1323 adb_int_pending = 1;
1324 if (gpio_irq >= 0)
1325 enable_irq(gpio_irq);
1326 out_8(&via[IER], CB1_INT | IER_SET);
1327 spin_unlock_irqrestore(&pmu_lock, flags);
1328 pmu_poll();
1329 }
1330
1331 /* Interrupt data could be the result data from an ADB cmd */
1332 static void
1333 pmu_handle_data(unsigned char *data, int len)
1334 {
1335 unsigned char ints, pirq;
1336 int i = 0;
1337
1338 asleep = 0;
1339 if (drop_interrupts || len < 1) {
1340 adb_int_pending = 0;
1341 pmu_irq_stats[8]++;
1342 return;
1343 }
1344
1345 /* Get PMU interrupt mask */
1346 ints = data[0];
1347
1348 /* Record zero interrupts for stats */
1349 if (ints == 0)
1350 pmu_irq_stats[9]++;
1351
1352 /* Hack to deal with ADB autopoll flag */
1353 if (ints & PMU_INT_ADB)
1354 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1355
1356 next:
1357
1358 if (ints == 0) {
1359 if (i > pmu_irq_stats[10])
1360 pmu_irq_stats[10] = i;
1361 return;
1362 }
1363
1364 for (pirq = 0; pirq < 8; pirq++)
1365 if (ints & (1 << pirq))
1366 break;
1367 pmu_irq_stats[pirq]++;
1368 i++;
1369 ints &= ~(1 << pirq);
1370
1371 /* Note: for some reason, we get an interrupt with len=1,
1372 * data[0]==0 after each normal ADB interrupt, at least
1373 * on the Pismo. Still investigating... --BenH
1374 */
1375 if ((1 << pirq) & PMU_INT_ADB) {
1376 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1377 struct adb_request *req = req_awaiting_reply;
1378 if (req == 0) {
1379 printk(KERN_ERR "PMU: extra ADB reply\n");
1380 return;
1381 }
1382 req_awaiting_reply = NULL;
1383 if (len <= 2)
1384 req->reply_len = 0;
1385 else {
1386 memcpy(req->reply, data + 1, len - 1);
1387 req->reply_len = len - 1;
1388 }
1389 pmu_done(req);
1390 } else {
1391 if (len == 4 && data[1] == 0x2c) {
1392 extern int xmon_wants_key, xmon_adb_keycode;
1393 if (xmon_wants_key) {
1394 xmon_adb_keycode = data[2];
1395 return;
1396 }
1397 }
1398 #ifdef CONFIG_ADB
1399 /*
1400 * XXX On the [23]400 the PMU gives us an up
1401 * event for keycodes 0x74 or 0x75 when the PC
1402 * card eject buttons are released, so we
1403 * ignore those events.
1404 */
1405 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1406 && data[1] == 0x2c && data[3] == 0xff
1407 && (data[2] & ~1) == 0xf4))
1408 adb_input(data+1, len-1, 1);
1409 #endif /* CONFIG_ADB */
1410 }
1411 }
1412 /* Sound/brightness button pressed */
1413 else if ((1 << pirq) & PMU_INT_SNDBRT) {
1414 #ifdef CONFIG_PMAC_BACKLIGHT
1415 if (len == 3)
1416 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1417 #endif
1418 }
1419 /* Tick interrupt */
1420 else if ((1 << pirq) & PMU_INT_TICK) {
1421 /* Environement or tick interrupt, query batteries */
1422 if (pmu_battery_count) {
1423 if ((--query_batt_timer) == 0) {
1424 query_battery_state();
1425 query_batt_timer = BATTERY_POLLING_COUNT;
1426 }
1427 }
1428 }
1429 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1430 if (pmu_battery_count)
1431 query_battery_state();
1432 pmu_pass_intr(data, len);
1433 /* len == 6 is probably a bad check. But how do I
1434 * know what PMU versions send what events here? */
1435 if (len == 6) {
1436 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1437 via_pmu_event(PMU_EVT_LID, data[1]&1);
1438 }
1439 } else {
1440 pmu_pass_intr(data, len);
1441 }
1442 goto next;
1443 }
1444
1445 static struct adb_request*
1446 pmu_sr_intr(void)
1447 {
1448 struct adb_request *req;
1449 int bite = 0;
1450
1451 if (via[B] & TREQ) {
1452 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1453 out_8(&via[IFR], SR_INT);
1454 return NULL;
1455 }
1456 /* The ack may not yet be low when we get the interrupt */
1457 while ((in_8(&via[B]) & TACK) != 0)
1458 ;
1459
1460 /* if reading grab the byte, and reset the interrupt */
1461 if (pmu_state == reading || pmu_state == reading_intr)
1462 bite = in_8(&via[SR]);
1463
1464 /* reset TREQ and wait for TACK to go high */
1465 out_8(&via[B], in_8(&via[B]) | TREQ);
1466 wait_for_ack();
1467
1468 switch (pmu_state) {
1469 case sending:
1470 req = current_req;
1471 if (data_len < 0) {
1472 data_len = req->nbytes - 1;
1473 send_byte(data_len);
1474 break;
1475 }
1476 if (data_index <= data_len) {
1477 send_byte(req->data[data_index++]);
1478 break;
1479 }
1480 req->sent = 1;
1481 data_len = pmu_data_len[req->data[0]][1];
1482 if (data_len == 0) {
1483 pmu_state = idle;
1484 current_req = req->next;
1485 if (req->reply_expected)
1486 req_awaiting_reply = req;
1487 else
1488 return req;
1489 } else {
1490 pmu_state = reading;
1491 data_index = 0;
1492 reply_ptr = req->reply + req->reply_len;
1493 recv_byte();
1494 }
1495 break;
1496
1497 case intack:
1498 data_index = 0;
1499 data_len = -1;
1500 pmu_state = reading_intr;
1501 reply_ptr = interrupt_data[int_data_last];
1502 recv_byte();
1503 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1504 enable_irq(gpio_irq);
1505 gpio_irq_enabled = 1;
1506 }
1507 break;
1508
1509 case reading:
1510 case reading_intr:
1511 if (data_len == -1) {
1512 data_len = bite;
1513 if (bite > 32)
1514 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1515 } else if (data_index < 32) {
1516 reply_ptr[data_index++] = bite;
1517 }
1518 if (data_index < data_len) {
1519 recv_byte();
1520 break;
1521 }
1522
1523 if (pmu_state == reading_intr) {
1524 pmu_state = idle;
1525 int_data_state[int_data_last] = int_data_ready;
1526 interrupt_data_len[int_data_last] = data_len;
1527 } else {
1528 req = current_req;
1529 /*
1530 * For PMU sleep and freq change requests, we lock the
1531 * PMU until it's explicitly unlocked. This avoids any
1532 * spurrious event polling getting in
1533 */
1534 current_req = req->next;
1535 req->reply_len += data_index;
1536 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1537 pmu_state = locked;
1538 else
1539 pmu_state = idle;
1540 return req;
1541 }
1542 break;
1543
1544 default:
1545 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1546 pmu_state);
1547 }
1548 return NULL;
1549 }
1550
1551 static irqreturn_t
1552 via_pmu_interrupt(int irq, void *arg)
1553 {
1554 unsigned long flags;
1555 int intr;
1556 int nloop = 0;
1557 int int_data = -1;
1558 struct adb_request *req = NULL;
1559 int handled = 0;
1560
1561 /* This is a bit brutal, we can probably do better */
1562 spin_lock_irqsave(&pmu_lock, flags);
1563 ++disable_poll;
1564
1565 for (;;) {
1566 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1567 if (intr == 0)
1568 break;
1569 handled = 1;
1570 if (++nloop > 1000) {
1571 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1572 "intr=%x, ier=%x pmu_state=%d\n",
1573 intr, in_8(&via[IER]), pmu_state);
1574 break;
1575 }
1576 out_8(&via[IFR], intr);
1577 if (intr & CB1_INT) {
1578 adb_int_pending = 1;
1579 pmu_irq_stats[0]++;
1580 }
1581 if (intr & SR_INT) {
1582 req = pmu_sr_intr();
1583 if (req)
1584 break;
1585 }
1586 }
1587
1588 recheck:
1589 if (pmu_state == idle) {
1590 if (adb_int_pending) {
1591 if (int_data_state[0] == int_data_empty)
1592 int_data_last = 0;
1593 else if (int_data_state[1] == int_data_empty)
1594 int_data_last = 1;
1595 else
1596 goto no_free_slot;
1597 pmu_state = intack;
1598 int_data_state[int_data_last] = int_data_fill;
1599 /* Sounds safer to make sure ACK is high before writing.
1600 * This helped kill a problem with ADB and some iBooks
1601 */
1602 wait_for_ack();
1603 send_byte(PMU_INT_ACK);
1604 adb_int_pending = 0;
1605 } else if (current_req)
1606 pmu_start();
1607 }
1608 no_free_slot:
1609 /* Mark the oldest buffer for flushing */
1610 if (int_data_state[!int_data_last] == int_data_ready) {
1611 int_data_state[!int_data_last] = int_data_flush;
1612 int_data = !int_data_last;
1613 } else if (int_data_state[int_data_last] == int_data_ready) {
1614 int_data_state[int_data_last] = int_data_flush;
1615 int_data = int_data_last;
1616 }
1617 --disable_poll;
1618 spin_unlock_irqrestore(&pmu_lock, flags);
1619
1620 /* Deal with completed PMU requests outside of the lock */
1621 if (req) {
1622 pmu_done(req);
1623 req = NULL;
1624 }
1625
1626 /* Deal with interrupt datas outside of the lock */
1627 if (int_data >= 0) {
1628 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1629 spin_lock_irqsave(&pmu_lock, flags);
1630 ++disable_poll;
1631 int_data_state[int_data] = int_data_empty;
1632 int_data = -1;
1633 goto recheck;
1634 }
1635
1636 return IRQ_RETVAL(handled);
1637 }
1638
1639 void
1640 pmu_unlock(void)
1641 {
1642 unsigned long flags;
1643
1644 spin_lock_irqsave(&pmu_lock, flags);
1645 if (pmu_state == locked)
1646 pmu_state = idle;
1647 adb_int_pending = 1;
1648 spin_unlock_irqrestore(&pmu_lock, flags);
1649 }
1650
1651
1652 static irqreturn_t
1653 gpio1_interrupt(int irq, void *arg)
1654 {
1655 unsigned long flags;
1656
1657 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1658 spin_lock_irqsave(&pmu_lock, flags);
1659 if (gpio_irq_enabled > 0) {
1660 disable_irq_nosync(gpio_irq);
1661 gpio_irq_enabled = 0;
1662 }
1663 pmu_irq_stats[1]++;
1664 adb_int_pending = 1;
1665 spin_unlock_irqrestore(&pmu_lock, flags);
1666 via_pmu_interrupt(0, NULL);
1667 return IRQ_HANDLED;
1668 }
1669 return IRQ_NONE;
1670 }
1671
1672 void
1673 pmu_enable_irled(int on)
1674 {
1675 struct adb_request req;
1676
1677 if (vias == NULL)
1678 return ;
1679 if (pmu_kind == PMU_KEYLARGO_BASED)
1680 return ;
1681
1682 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1683 (on ? PMU_POW_ON : PMU_POW_OFF));
1684 pmu_wait_complete(&req);
1685 }
1686
1687 void
1688 pmu_restart(void)
1689 {
1690 struct adb_request req;
1691
1692 if (via == NULL)
1693 return;
1694
1695 local_irq_disable();
1696
1697 drop_interrupts = 1;
1698
1699 if (pmu_kind != PMU_KEYLARGO_BASED) {
1700 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1701 PMU_INT_TICK );
1702 while(!req.complete)
1703 pmu_poll();
1704 }
1705
1706 pmu_request(&req, NULL, 1, PMU_RESET);
1707 pmu_wait_complete(&req);
1708 for (;;)
1709 ;
1710 }
1711
1712 void
1713 pmu_shutdown(void)
1714 {
1715 struct adb_request req;
1716
1717 if (via == NULL)
1718 return;
1719
1720 local_irq_disable();
1721
1722 drop_interrupts = 1;
1723
1724 if (pmu_kind != PMU_KEYLARGO_BASED) {
1725 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1726 PMU_INT_TICK );
1727 pmu_wait_complete(&req);
1728 } else {
1729 /* Disable server mode on shutdown or we'll just
1730 * wake up again
1731 */
1732 pmu_set_server_mode(0);
1733 }
1734
1735 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1736 'M', 'A', 'T', 'T');
1737 pmu_wait_complete(&req);
1738 for (;;)
1739 ;
1740 }
1741
1742 int
1743 pmu_present(void)
1744 {
1745 return via != 0;
1746 }
1747
1748 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1749 /*
1750 * Put the powerbook to sleep.
1751 */
1752
1753 static u32 save_via[8];
1754
1755 static void
1756 save_via_state(void)
1757 {
1758 save_via[0] = in_8(&via[ANH]);
1759 save_via[1] = in_8(&via[DIRA]);
1760 save_via[2] = in_8(&via[B]);
1761 save_via[3] = in_8(&via[DIRB]);
1762 save_via[4] = in_8(&via[PCR]);
1763 save_via[5] = in_8(&via[ACR]);
1764 save_via[6] = in_8(&via[T1CL]);
1765 save_via[7] = in_8(&via[T1CH]);
1766 }
1767 static void
1768 restore_via_state(void)
1769 {
1770 out_8(&via[ANH], save_via[0]);
1771 out_8(&via[DIRA], save_via[1]);
1772 out_8(&via[B], save_via[2]);
1773 out_8(&via[DIRB], save_via[3]);
1774 out_8(&via[PCR], save_via[4]);
1775 out_8(&via[ACR], save_via[5]);
1776 out_8(&via[T1CL], save_via[6]);
1777 out_8(&via[T1CH], save_via[7]);
1778 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
1779 out_8(&via[IFR], 0x7f); /* clear IFR */
1780 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1781 }
1782
1783 #define GRACKLE_PM (1<<7)
1784 #define GRACKLE_DOZE (1<<5)
1785 #define GRACKLE_NAP (1<<4)
1786 #define GRACKLE_SLEEP (1<<3)
1787
1788 static int powerbook_sleep_grackle(void)
1789 {
1790 unsigned long save_l2cr;
1791 unsigned short pmcr1;
1792 struct adb_request req;
1793 struct pci_dev *grackle;
1794
1795 grackle = pci_get_bus_and_slot(0, 0);
1796 if (!grackle)
1797 return -ENODEV;
1798
1799 /* Turn off various things. Darwin does some retry tests here... */
1800 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1801 pmu_wait_complete(&req);
1802 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1803 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1804 pmu_wait_complete(&req);
1805
1806 /* For 750, save backside cache setting and disable it */
1807 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1808
1809 if (!__fake_sleep) {
1810 /* Ask the PMU to put us to sleep */
1811 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1812 pmu_wait_complete(&req);
1813 }
1814
1815 /* The VIA is supposed not to be restored correctly*/
1816 save_via_state();
1817 /* We shut down some HW */
1818 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1819
1820 pci_read_config_word(grackle, 0x70, &pmcr1);
1821 /* Apparently, MacOS uses NAP mode for Grackle ??? */
1822 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1823 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1824 pci_write_config_word(grackle, 0x70, pmcr1);
1825
1826 /* Call low-level ASM sleep handler */
1827 if (__fake_sleep)
1828 mdelay(5000);
1829 else
1830 low_sleep_handler();
1831
1832 /* We're awake again, stop grackle PM */
1833 pci_read_config_word(grackle, 0x70, &pmcr1);
1834 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1835 pci_write_config_word(grackle, 0x70, pmcr1);
1836
1837 pci_dev_put(grackle);
1838
1839 /* Make sure the PMU is idle */
1840 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1841 restore_via_state();
1842
1843 /* Restore L2 cache */
1844 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1845 _set_L2CR(save_l2cr);
1846
1847 /* Restore userland MMU context */
1848 switch_mmu_context(NULL, current->active_mm);
1849
1850 /* Power things up */
1851 pmu_unlock();
1852 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1853 pmu_wait_complete(&req);
1854 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1855 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1856 pmu_wait_complete(&req);
1857 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1858 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1859 pmu_wait_complete(&req);
1860
1861 return 0;
1862 }
1863
1864 static int
1865 powerbook_sleep_Core99(void)
1866 {
1867 unsigned long save_l2cr;
1868 unsigned long save_l3cr;
1869 struct adb_request req;
1870
1871 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1872 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1873 return -ENOSYS;
1874 }
1875
1876 if (num_online_cpus() > 1 || cpu_is_offline(0))
1877 return -EAGAIN;
1878
1879 /* Stop environment and ADB interrupts */
1880 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1881 pmu_wait_complete(&req);
1882
1883 /* Tell PMU what events will wake us up */
1884 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1885 0xff, 0xff);
1886 pmu_wait_complete(&req);
1887 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1888 0, PMU_PWR_WAKEUP_KEY |
1889 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1890 pmu_wait_complete(&req);
1891
1892 /* Save the state of the L2 and L3 caches */
1893 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
1894 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1895
1896 if (!__fake_sleep) {
1897 /* Ask the PMU to put us to sleep */
1898 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1899 pmu_wait_complete(&req);
1900 }
1901
1902 /* The VIA is supposed not to be restored correctly*/
1903 save_via_state();
1904
1905 /* Shut down various ASICs. There's a chance that we can no longer
1906 * talk to the PMU after this, so I moved it to _after_ sending the
1907 * sleep command to it. Still need to be checked.
1908 */
1909 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1910
1911 /* Call low-level ASM sleep handler */
1912 if (__fake_sleep)
1913 mdelay(5000);
1914 else
1915 low_sleep_handler();
1916
1917 /* Restore Apple core ASICs state */
1918 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1919
1920 /* Restore VIA */
1921 restore_via_state();
1922
1923 /* tweak LPJ before cpufreq is there */
1924 loops_per_jiffy *= 2;
1925
1926 /* Restore video */
1927 pmac_call_early_video_resume();
1928
1929 /* Restore L2 cache */
1930 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1931 _set_L2CR(save_l2cr);
1932 /* Restore L3 cache */
1933 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1934 _set_L3CR(save_l3cr);
1935
1936 /* Restore userland MMU context */
1937 switch_mmu_context(NULL, current->active_mm);
1938
1939 /* Tell PMU we are ready */
1940 pmu_unlock();
1941 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1942 pmu_wait_complete(&req);
1943 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1944 pmu_wait_complete(&req);
1945
1946 /* Restore LPJ, cpufreq will adjust the cpu frequency */
1947 loops_per_jiffy /= 2;
1948
1949 return 0;
1950 }
1951
1952 #define PB3400_MEM_CTRL 0xf8000000
1953 #define PB3400_MEM_CTRL_SLEEP 0x70
1954
1955 static void __iomem *pb3400_mem_ctrl;
1956
1957 static void powerbook_sleep_init_3400(void)
1958 {
1959 /* map in the memory controller registers */
1960 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1961 if (pb3400_mem_ctrl == NULL)
1962 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1963 }
1964
1965 static int powerbook_sleep_3400(void)
1966 {
1967 int i, x;
1968 unsigned int hid0;
1969 unsigned long msr;
1970 struct adb_request sleep_req;
1971 unsigned int __iomem *mem_ctrl_sleep;
1972
1973 if (pb3400_mem_ctrl == NULL)
1974 return -ENOMEM;
1975 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1976
1977 /* Set the memory controller to keep the memory refreshed
1978 while we're asleep */
1979 for (i = 0x403f; i >= 0x4000; --i) {
1980 out_be32(mem_ctrl_sleep, i);
1981 do {
1982 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1983 } while (x == 0);
1984 if (x >= 0x100)
1985 break;
1986 }
1987
1988 /* Ask the PMU to put us to sleep */
1989 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1990 pmu_wait_complete(&sleep_req);
1991 pmu_unlock();
1992
1993 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1994
1995 asleep = 1;
1996
1997 /* Put the CPU into sleep mode */
1998 hid0 = mfspr(SPRN_HID0);
1999 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2000 mtspr(SPRN_HID0, hid0);
2001 local_irq_enable();
2002 msr = mfmsr() | MSR_POW;
2003 while (asleep) {
2004 mb();
2005 mtmsr(msr);
2006 isync();
2007 }
2008 local_irq_disable();
2009
2010 /* OK, we're awake again, start restoring things */
2011 out_be32(mem_ctrl_sleep, 0x3f);
2012 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2013
2014 return 0;
2015 }
2016
2017 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2018
2019 /*
2020 * Support for /dev/pmu device
2021 */
2022 #define RB_SIZE 0x10
2023 struct pmu_private {
2024 struct list_head list;
2025 int rb_get;
2026 int rb_put;
2027 struct rb_entry {
2028 unsigned short len;
2029 unsigned char data[16];
2030 } rb_buf[RB_SIZE];
2031 wait_queue_head_t wait;
2032 spinlock_t lock;
2033 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2034 int backlight_locker;
2035 #endif
2036 };
2037
2038 static LIST_HEAD(all_pmu_pvt);
2039 static DEFINE_SPINLOCK(all_pvt_lock);
2040
2041 static void
2042 pmu_pass_intr(unsigned char *data, int len)
2043 {
2044 struct pmu_private *pp;
2045 struct list_head *list;
2046 int i;
2047 unsigned long flags;
2048
2049 if (len > sizeof(pp->rb_buf[0].data))
2050 len = sizeof(pp->rb_buf[0].data);
2051 spin_lock_irqsave(&all_pvt_lock, flags);
2052 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2053 pp = list_entry(list, struct pmu_private, list);
2054 spin_lock(&pp->lock);
2055 i = pp->rb_put + 1;
2056 if (i >= RB_SIZE)
2057 i = 0;
2058 if (i != pp->rb_get) {
2059 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2060 rp->len = len;
2061 memcpy(rp->data, data, len);
2062 pp->rb_put = i;
2063 wake_up_interruptible(&pp->wait);
2064 }
2065 spin_unlock(&pp->lock);
2066 }
2067 spin_unlock_irqrestore(&all_pvt_lock, flags);
2068 }
2069
2070 static int
2071 pmu_open(struct inode *inode, struct file *file)
2072 {
2073 struct pmu_private *pp;
2074 unsigned long flags;
2075
2076 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2077 if (pp == 0)
2078 return -ENOMEM;
2079 pp->rb_get = pp->rb_put = 0;
2080 spin_lock_init(&pp->lock);
2081 init_waitqueue_head(&pp->wait);
2082 mutex_lock(&pmu_info_proc_mutex);
2083 spin_lock_irqsave(&all_pvt_lock, flags);
2084 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2085 pp->backlight_locker = 0;
2086 #endif
2087 list_add(&pp->list, &all_pmu_pvt);
2088 spin_unlock_irqrestore(&all_pvt_lock, flags);
2089 file->private_data = pp;
2090 mutex_unlock(&pmu_info_proc_mutex);
2091 return 0;
2092 }
2093
2094 static ssize_t
2095 pmu_read(struct file *file, char __user *buf,
2096 size_t count, loff_t *ppos)
2097 {
2098 struct pmu_private *pp = file->private_data;
2099 DECLARE_WAITQUEUE(wait, current);
2100 unsigned long flags;
2101 int ret = 0;
2102
2103 if (count < 1 || pp == 0)
2104 return -EINVAL;
2105 if (!access_ok(VERIFY_WRITE, buf, count))
2106 return -EFAULT;
2107
2108 spin_lock_irqsave(&pp->lock, flags);
2109 add_wait_queue(&pp->wait, &wait);
2110 current->state = TASK_INTERRUPTIBLE;
2111
2112 for (;;) {
2113 ret = -EAGAIN;
2114 if (pp->rb_get != pp->rb_put) {
2115 int i = pp->rb_get;
2116 struct rb_entry *rp = &pp->rb_buf[i];
2117 ret = rp->len;
2118 spin_unlock_irqrestore(&pp->lock, flags);
2119 if (ret > count)
2120 ret = count;
2121 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2122 ret = -EFAULT;
2123 if (++i >= RB_SIZE)
2124 i = 0;
2125 spin_lock_irqsave(&pp->lock, flags);
2126 pp->rb_get = i;
2127 }
2128 if (ret >= 0)
2129 break;
2130 if (file->f_flags & O_NONBLOCK)
2131 break;
2132 ret = -ERESTARTSYS;
2133 if (signal_pending(current))
2134 break;
2135 spin_unlock_irqrestore(&pp->lock, flags);
2136 schedule();
2137 spin_lock_irqsave(&pp->lock, flags);
2138 }
2139 current->state = TASK_RUNNING;
2140 remove_wait_queue(&pp->wait, &wait);
2141 spin_unlock_irqrestore(&pp->lock, flags);
2142
2143 return ret;
2144 }
2145
2146 static ssize_t
2147 pmu_write(struct file *file, const char __user *buf,
2148 size_t count, loff_t *ppos)
2149 {
2150 return 0;
2151 }
2152
2153 static unsigned int
2154 pmu_fpoll(struct file *filp, poll_table *wait)
2155 {
2156 struct pmu_private *pp = filp->private_data;
2157 unsigned int mask = 0;
2158 unsigned long flags;
2159
2160 if (pp == 0)
2161 return 0;
2162 poll_wait(filp, &pp->wait, wait);
2163 spin_lock_irqsave(&pp->lock, flags);
2164 if (pp->rb_get != pp->rb_put)
2165 mask |= POLLIN;
2166 spin_unlock_irqrestore(&pp->lock, flags);
2167 return mask;
2168 }
2169
2170 static int
2171 pmu_release(struct inode *inode, struct file *file)
2172 {
2173 struct pmu_private *pp = file->private_data;
2174 unsigned long flags;
2175
2176 if (pp != 0) {
2177 file->private_data = NULL;
2178 spin_lock_irqsave(&all_pvt_lock, flags);
2179 list_del(&pp->list);
2180 spin_unlock_irqrestore(&all_pvt_lock, flags);
2181
2182 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2183 if (pp->backlight_locker)
2184 pmac_backlight_enable();
2185 #endif
2186
2187 kfree(pp);
2188 }
2189 return 0;
2190 }
2191
2192 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2193 static void pmac_suspend_disable_irqs(void)
2194 {
2195 /* Call platform functions marked "on sleep" */
2196 pmac_pfunc_i2c_suspend();
2197 pmac_pfunc_base_suspend();
2198 }
2199
2200 static int powerbook_sleep(suspend_state_t state)
2201 {
2202 int error = 0;
2203
2204 /* Wait for completion of async requests */
2205 while (!batt_req.complete)
2206 pmu_poll();
2207
2208 /* Giveup the lazy FPU & vec so we don't have to back them
2209 * up from the low level code
2210 */
2211 enable_kernel_fp();
2212
2213 #ifdef CONFIG_ALTIVEC
2214 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2215 enable_kernel_altivec();
2216 #endif /* CONFIG_ALTIVEC */
2217
2218 switch (pmu_kind) {
2219 case PMU_OHARE_BASED:
2220 error = powerbook_sleep_3400();
2221 break;
2222 case PMU_HEATHROW_BASED:
2223 case PMU_PADDINGTON_BASED:
2224 error = powerbook_sleep_grackle();
2225 break;
2226 case PMU_KEYLARGO_BASED:
2227 error = powerbook_sleep_Core99();
2228 break;
2229 default:
2230 return -ENOSYS;
2231 }
2232
2233 if (error)
2234 return error;
2235
2236 mdelay(100);
2237
2238 return 0;
2239 }
2240
2241 static void pmac_suspend_enable_irqs(void)
2242 {
2243 /* Force a poll of ADB interrupts */
2244 adb_int_pending = 1;
2245 via_pmu_interrupt(0, NULL);
2246
2247 mdelay(10);
2248
2249 /* Call platform functions marked "on wake" */
2250 pmac_pfunc_base_resume();
2251 pmac_pfunc_i2c_resume();
2252 }
2253
2254 static int pmu_sleep_valid(suspend_state_t state)
2255 {
2256 return state == PM_SUSPEND_MEM
2257 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2258 }
2259
2260 static const struct platform_suspend_ops pmu_pm_ops = {
2261 .enter = powerbook_sleep,
2262 .valid = pmu_sleep_valid,
2263 };
2264
2265 static int register_pmu_pm_ops(void)
2266 {
2267 if (pmu_kind == PMU_OHARE_BASED)
2268 powerbook_sleep_init_3400();
2269 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2270 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2271 suspend_set_ops(&pmu_pm_ops);
2272
2273 return 0;
2274 }
2275
2276 device_initcall(register_pmu_pm_ops);
2277 #endif
2278
2279 static int pmu_ioctl(struct file *filp,
2280 u_int cmd, u_long arg)
2281 {
2282 __u32 __user *argp = (__u32 __user *)arg;
2283 int error = -EINVAL;
2284
2285 switch (cmd) {
2286 case PMU_IOC_SLEEP:
2287 if (!capable(CAP_SYS_ADMIN))
2288 return -EACCES;
2289 return pm_suspend(PM_SUSPEND_MEM);
2290 case PMU_IOC_CAN_SLEEP:
2291 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2292 return put_user(0, argp);
2293 else
2294 return put_user(1, argp);
2295
2296 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2297 /* Compatibility ioctl's for backlight */
2298 case PMU_IOC_GET_BACKLIGHT:
2299 {
2300 int brightness;
2301
2302 brightness = pmac_backlight_get_legacy_brightness();
2303 if (brightness < 0)
2304 return brightness;
2305 else
2306 return put_user(brightness, argp);
2307
2308 }
2309 case PMU_IOC_SET_BACKLIGHT:
2310 {
2311 int brightness;
2312
2313 error = get_user(brightness, argp);
2314 if (error)
2315 return error;
2316
2317 return pmac_backlight_set_legacy_brightness(brightness);
2318 }
2319 #ifdef CONFIG_INPUT_ADBHID
2320 case PMU_IOC_GRAB_BACKLIGHT: {
2321 struct pmu_private *pp = filp->private_data;
2322
2323 if (pp->backlight_locker)
2324 return 0;
2325
2326 pp->backlight_locker = 1;
2327 pmac_backlight_disable();
2328
2329 return 0;
2330 }
2331 #endif /* CONFIG_INPUT_ADBHID */
2332 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2333
2334 case PMU_IOC_GET_MODEL:
2335 return put_user(pmu_kind, argp);
2336 case PMU_IOC_HAS_ADB:
2337 return put_user(pmu_has_adb, argp);
2338 }
2339 return error;
2340 }
2341
2342 static long pmu_unlocked_ioctl(struct file *filp,
2343 u_int cmd, u_long arg)
2344 {
2345 int ret;
2346
2347 mutex_lock(&pmu_info_proc_mutex);
2348 ret = pmu_ioctl(filp, cmd, arg);
2349 mutex_unlock(&pmu_info_proc_mutex);
2350
2351 return ret;
2352 }
2353
2354 #ifdef CONFIG_COMPAT
2355 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2356 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2357 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t)
2358 #define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t)
2359 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t)
2360 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2361
2362 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2363 {
2364 switch (cmd) {
2365 case PMU_IOC_SLEEP:
2366 break;
2367 case PMU_IOC_GET_BACKLIGHT32:
2368 cmd = PMU_IOC_GET_BACKLIGHT;
2369 break;
2370 case PMU_IOC_SET_BACKLIGHT32:
2371 cmd = PMU_IOC_SET_BACKLIGHT;
2372 break;
2373 case PMU_IOC_GET_MODEL32:
2374 cmd = PMU_IOC_GET_MODEL;
2375 break;
2376 case PMU_IOC_HAS_ADB32:
2377 cmd = PMU_IOC_HAS_ADB;
2378 break;
2379 case PMU_IOC_CAN_SLEEP32:
2380 cmd = PMU_IOC_CAN_SLEEP;
2381 break;
2382 case PMU_IOC_GRAB_BACKLIGHT32:
2383 cmd = PMU_IOC_GRAB_BACKLIGHT;
2384 break;
2385 default:
2386 return -ENOIOCTLCMD;
2387 }
2388 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2389 }
2390 #endif
2391
2392 static const struct file_operations pmu_device_fops = {
2393 .read = pmu_read,
2394 .write = pmu_write,
2395 .poll = pmu_fpoll,
2396 .unlocked_ioctl = pmu_unlocked_ioctl,
2397 #ifdef CONFIG_COMPAT
2398 .compat_ioctl = compat_pmu_ioctl,
2399 #endif
2400 .open = pmu_open,
2401 .release = pmu_release,
2402 .llseek = noop_llseek,
2403 };
2404
2405 static struct miscdevice pmu_device = {
2406 PMU_MINOR, "pmu", &pmu_device_fops
2407 };
2408
2409 static int pmu_device_init(void)
2410 {
2411 if (!via)
2412 return 0;
2413 if (misc_register(&pmu_device) < 0)
2414 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2415 return 0;
2416 }
2417 device_initcall(pmu_device_init);
2418
2419
2420 #ifdef DEBUG_SLEEP
2421 static inline void
2422 polled_handshake(volatile unsigned char __iomem *via)
2423 {
2424 via[B] &= ~TREQ; eieio();
2425 while ((via[B] & TACK) != 0)
2426 ;
2427 via[B] |= TREQ; eieio();
2428 while ((via[B] & TACK) == 0)
2429 ;
2430 }
2431
2432 static inline void
2433 polled_send_byte(volatile unsigned char __iomem *via, int x)
2434 {
2435 via[ACR] |= SR_OUT | SR_EXT; eieio();
2436 via[SR] = x; eieio();
2437 polled_handshake(via);
2438 }
2439
2440 static inline int
2441 polled_recv_byte(volatile unsigned char __iomem *via)
2442 {
2443 int x;
2444
2445 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2446 x = via[SR]; eieio();
2447 polled_handshake(via);
2448 x = via[SR]; eieio();
2449 return x;
2450 }
2451
2452 int
2453 pmu_polled_request(struct adb_request *req)
2454 {
2455 unsigned long flags;
2456 int i, l, c;
2457 volatile unsigned char __iomem *v = via;
2458
2459 req->complete = 1;
2460 c = req->data[0];
2461 l = pmu_data_len[c][0];
2462 if (l >= 0 && req->nbytes != l + 1)
2463 return -EINVAL;
2464
2465 local_irq_save(flags);
2466 while (pmu_state != idle)
2467 pmu_poll();
2468
2469 while ((via[B] & TACK) == 0)
2470 ;
2471 polled_send_byte(v, c);
2472 if (l < 0) {
2473 l = req->nbytes - 1;
2474 polled_send_byte(v, l);
2475 }
2476 for (i = 1; i <= l; ++i)
2477 polled_send_byte(v, req->data[i]);
2478
2479 l = pmu_data_len[c][1];
2480 if (l < 0)
2481 l = polled_recv_byte(v);
2482 for (i = 0; i < l; ++i)
2483 req->reply[i + req->reply_len] = polled_recv_byte(v);
2484
2485 if (req->done)
2486 (*req->done)(req);
2487
2488 local_irq_restore(flags);
2489 return 0;
2490 }
2491
2492 /* N.B. This doesn't work on the 3400 */
2493 void pmu_blink(int n)
2494 {
2495 struct adb_request req;
2496
2497 memset(&req, 0, sizeof(req));
2498
2499 for (; n > 0; --n) {
2500 req.nbytes = 4;
2501 req.done = NULL;
2502 req.data[0] = 0xee;
2503 req.data[1] = 4;
2504 req.data[2] = 0;
2505 req.data[3] = 1;
2506 req.reply[0] = ADB_RET_OK;
2507 req.reply_len = 1;
2508 req.reply_expected = 0;
2509 pmu_polled_request(&req);
2510 mdelay(50);
2511 req.nbytes = 4;
2512 req.done = NULL;
2513 req.data[0] = 0xee;
2514 req.data[1] = 4;
2515 req.data[2] = 0;
2516 req.data[3] = 0;
2517 req.reply[0] = ADB_RET_OK;
2518 req.reply_len = 1;
2519 req.reply_expected = 0;
2520 pmu_polled_request(&req);
2521 mdelay(50);
2522 }
2523 mdelay(50);
2524 }
2525 #endif /* DEBUG_SLEEP */
2526
2527 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2528 int pmu_sys_suspended;
2529
2530 static int pmu_syscore_suspend(void)
2531 {
2532 /* Suspend PMU event interrupts */
2533 pmu_suspend();
2534 pmu_sys_suspended = 1;
2535
2536 #ifdef CONFIG_PMAC_BACKLIGHT
2537 /* Tell backlight code not to muck around with the chip anymore */
2538 pmu_backlight_set_sleep(1);
2539 #endif
2540
2541 return 0;
2542 }
2543
2544 static void pmu_syscore_resume(void)
2545 {
2546 struct adb_request req;
2547
2548 if (!pmu_sys_suspended)
2549 return;
2550
2551 /* Tell PMU we are ready */
2552 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2553 pmu_wait_complete(&req);
2554
2555 #ifdef CONFIG_PMAC_BACKLIGHT
2556 /* Tell backlight code it can use the chip again */
2557 pmu_backlight_set_sleep(0);
2558 #endif
2559 /* Resume PMU event interrupts */
2560 pmu_resume();
2561 pmu_sys_suspended = 0;
2562 }
2563
2564 static struct syscore_ops pmu_syscore_ops = {
2565 .suspend = pmu_syscore_suspend,
2566 .resume = pmu_syscore_resume,
2567 };
2568
2569 static int pmu_syscore_register(void)
2570 {
2571 register_syscore_ops(&pmu_syscore_ops);
2572
2573 return 0;
2574 }
2575 subsys_initcall(pmu_syscore_register);
2576 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2577
2578 EXPORT_SYMBOL(pmu_request);
2579 EXPORT_SYMBOL(pmu_queue_request);
2580 EXPORT_SYMBOL(pmu_poll);
2581 EXPORT_SYMBOL(pmu_poll_adb);
2582 EXPORT_SYMBOL(pmu_wait_complete);
2583 EXPORT_SYMBOL(pmu_suspend);
2584 EXPORT_SYMBOL(pmu_resume);
2585 EXPORT_SYMBOL(pmu_unlock);
2586 #if defined(CONFIG_PPC32)
2587 EXPORT_SYMBOL(pmu_enable_irled);
2588 EXPORT_SYMBOL(pmu_battery_count);
2589 EXPORT_SYMBOL(pmu_batteries);
2590 EXPORT_SYMBOL(pmu_power_flags);
2591 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2592