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[PATCH] NFSv4: empty array fix
[linux-2.6/verdex.git] / drivers / macintosh / via-pmu.c
blobb941ee220997adbc96b50b48862d0e47c687afda
1 /*
2 * Device driver for the via-pmu on Apple Powermacs.
3 *
4 * The VIA (versatile interface adapter) interfaces to the PMU,
5 * a 6805 microprocessor core whose primary function is to control
6 * battery charging and system power on the PowerBook 3400 and 2400.
7 * The PMU also controls the ADB (Apple Desktop Bus) which connects
8 * to the keyboard and mouse, as well as the non-volatile RAM
9 * and the RTC (real time clock) chip.
10 *
11 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
12 * Copyright (C) 2001-2002 Benjamin Herrenschmidt
13 *
14 * THIS DRIVER IS BECOMING A TOTAL MESS !
15 * - Cleanup atomically disabling reply to PMU events after
16 * a sleep or a freq. switch
17 * - Move sleep code out of here to pmac_pm, merge into new
18 * common PM infrastructure
19 * - Move backlight code out as well
20 * - Save/Restore PCI space properly
21 *
22 */
23 #include <stdarg.h>
24 #include <linux/config.h>
25 #include <linux/types.h>
26 #include <linux/errno.h>
27 #include <linux/kernel.h>
28 #include <linux/delay.h>
29 #include <linux/sched.h>
30 #include <linux/miscdevice.h>
31 #include <linux/blkdev.h>
32 #include <linux/pci.h>
33 #include <linux/slab.h>
34 #include <linux/poll.h>
35 #include <linux/adb.h>
36 #include <linux/pmu.h>
37 #include <linux/cuda.h>
38 #include <linux/smp_lock.h>
39 #include <linux/module.h>
40 #include <linux/spinlock.h>
41 #include <linux/pm.h>
42 #include <linux/proc_fs.h>
43 #include <linux/init.h>
44 #include <linux/interrupt.h>
45 #include <linux/device.h>
46 #include <linux/sysdev.h>
47 #include <linux/suspend.h>
48 #include <linux/syscalls.h>
49 #include <linux/cpu.h>
50 #include <asm/prom.h>
51 #include <asm/machdep.h>
52 #include <asm/io.h>
53 #include <asm/pgtable.h>
54 #include <asm/system.h>
55 #include <asm/sections.h>
56 #include <asm/irq.h>
57 #include <asm/pmac_feature.h>
58 #include <asm/uaccess.h>
59 #include <asm/mmu_context.h>
60 #include <asm/cputable.h>
61 #include <asm/time.h>
62 #ifdef CONFIG_PMAC_BACKLIGHT
63 #include <asm/backlight.h>
64 #endif
65
66 /* Some compile options */
67 #undef SUSPEND_USES_PMU
68 #define DEBUG_SLEEP
69 #undef HACKED_PCI_SAVE
70
71 /* Misc minor number allocated for /dev/pmu */
72 #define PMU_MINOR 154
73
74 /* How many iterations between battery polls */
75 #define BATTERY_POLLING_COUNT 2
76
77 static volatile unsigned char __iomem *via;
78
79 /* VIA registers - spaced 0x200 bytes apart */
80 #define RS 0x200 /* skip between registers */
81 #define B 0 /* B-side data */
82 #define A RS /* A-side data */
83 #define DIRB (2*RS) /* B-side direction (1=output) */
84 #define DIRA (3*RS) /* A-side direction (1=output) */
85 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
86 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
87 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
88 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
89 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
90 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
91 #define SR (10*RS) /* Shift register */
92 #define ACR (11*RS) /* Auxiliary control register */
93 #define PCR (12*RS) /* Peripheral control register */
94 #define IFR (13*RS) /* Interrupt flag register */
95 #define IER (14*RS) /* Interrupt enable register */
96 #define ANH (15*RS) /* A-side data, no handshake */
97
98 /* Bits in B data register: both active low */
99 #define TACK 0x08 /* Transfer acknowledge (input) */
100 #define TREQ 0x10 /* Transfer request (output) */
101
102 /* Bits in ACR */
103 #define SR_CTRL 0x1c /* Shift register control bits */
104 #define SR_EXT 0x0c /* Shift on external clock */
105 #define SR_OUT 0x10 /* Shift out if 1 */
106
107 /* Bits in IFR and IER */
108 #define IER_SET 0x80 /* set bits in IER */
109 #define IER_CLR 0 /* clear bits in IER */
110 #define SR_INT 0x04 /* Shift register full/empty */
111 #define CB2_INT 0x08
112 #define CB1_INT 0x10 /* transition on CB1 input */
113
114 static volatile enum pmu_state {
115 idle,
116 sending,
117 intack,
118 reading,
119 reading_intr,
120 locked,
121 } pmu_state;
122
123 static volatile enum int_data_state {
124 int_data_empty,
125 int_data_fill,
126 int_data_ready,
127 int_data_flush
128 } int_data_state[2] = { int_data_empty, int_data_empty };
129
130 static struct adb_request *current_req;
131 static struct adb_request *last_req;
132 static struct adb_request *req_awaiting_reply;
133 static unsigned char interrupt_data[2][32];
134 static int interrupt_data_len[2];
135 static int int_data_last;
136 static unsigned char *reply_ptr;
137 static int data_index;
138 static int data_len;
139 static volatile int adb_int_pending;
140 static volatile int disable_poll;
141 static struct adb_request bright_req_1, bright_req_2;
142 static struct device_node *vias;
143 static int pmu_kind = PMU_UNKNOWN;
144 static int pmu_fully_inited = 0;
145 static int pmu_has_adb;
146 static unsigned char __iomem *gpio_reg = NULL;
147 static int gpio_irq = -1;
148 static int gpio_irq_enabled = -1;
149 static volatile int pmu_suspended = 0;
150 static spinlock_t pmu_lock;
151 static u8 pmu_intr_mask;
152 static int pmu_version;
153 static int drop_interrupts;
154 #ifdef CONFIG_PMAC_PBOOK
155 static int option_lid_wakeup = 1;
156 static int sleep_in_progress;
157 #endif /* CONFIG_PMAC_PBOOK */
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 #ifdef CONFIG_PMAC_PBOOK
168 int pmu_battery_count;
169 int pmu_cur_battery;
170 unsigned int pmu_power_flags;
171 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
172 static int query_batt_timer = BATTERY_POLLING_COUNT;
173 static struct adb_request batt_req;
174 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
175 #endif /* CONFIG_PMAC_PBOOK */
176
177 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
178 extern int disable_kernel_backlight;
179 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
180
181 int __fake_sleep;
182 int asleep;
183 struct notifier_block *sleep_notifier_list;
184
185 #ifdef CONFIG_ADB
186 static int adb_dev_map = 0;
187 static int pmu_adb_flags;
188
189 static int pmu_probe(void);
190 static int pmu_init(void);
191 static int pmu_send_request(struct adb_request *req, int sync);
192 static int pmu_adb_autopoll(int devs);
193 static int pmu_adb_reset_bus(void);
194 #endif /* CONFIG_ADB */
195
196 static int init_pmu(void);
197 static int pmu_queue_request(struct adb_request *req);
198 static void pmu_start(void);
199 static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
200 static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
201 static int proc_get_info(char *page, char **start, off_t off,
202 int count, int *eof, void *data);
203 static int proc_get_irqstats(char *page, char **start, off_t off,
204 int count, int *eof, void *data);
205 #ifdef CONFIG_PMAC_BACKLIGHT
206 static int pmu_set_backlight_level(int level, void* data);
207 static int pmu_set_backlight_enable(int on, int level, void* data);
208 #endif /* CONFIG_PMAC_BACKLIGHT */
209 #ifdef CONFIG_PMAC_PBOOK
210 static void pmu_pass_intr(unsigned char *data, int len);
211 static int proc_get_batt(char *page, char **start, off_t off,
212 int count, int *eof, void *data);
213 #endif /* CONFIG_PMAC_PBOOK */
214 static int proc_read_options(char *page, char **start, off_t off,
215 int count, int *eof, void *data);
216 static int proc_write_options(struct file *file, const char __user *buffer,
217 unsigned long count, void *data);
218
219 #ifdef CONFIG_ADB
220 struct adb_driver via_pmu_driver = {
221 "PMU",
222 pmu_probe,
223 pmu_init,
224 pmu_send_request,
225 pmu_adb_autopoll,
226 pmu_poll_adb,
227 pmu_adb_reset_bus
228 };
229 #endif /* CONFIG_ADB */
230
231 extern void low_sleep_handler(void);
232 extern void enable_kernel_altivec(void);
233 extern void enable_kernel_fp(void);
234
235 #ifdef DEBUG_SLEEP
236 int pmu_polled_request(struct adb_request *req);
237 int pmu_wink(struct adb_request *req);
238 #endif
239
240 /*
241 * This table indicates for each PMU opcode:
242 * - the number of data bytes to be sent with the command, or -1
243 * if a length byte should be sent,
244 * - the number of response bytes which the PMU will return, or
245 * -1 if it will send a length byte.
246 */
247 static const s8 pmu_data_len[256][2] __openfirmwaredata = {
248 /* 0 1 2 3 4 5 6 7 */
249 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
250 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
251 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
252 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
253 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
254 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
255 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
256 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
257 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
258 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
259 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
260 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
261 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
262 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
263 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
264 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
265 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
266 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
267 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
268 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
269 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
270 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
271 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
272 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
273 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
274 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
275 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
276 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
277 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
278 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
279 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
280 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
281 };
282
283 static char *pbook_type[] = {
284 "Unknown PowerBook",
285 "PowerBook 2400/3400/3500(G3)",
286 "PowerBook G3 Series",
287 "1999 PowerBook G3",
288 "Core99"
289 };
290
291 #ifdef CONFIG_PMAC_BACKLIGHT
292 static struct backlight_controller pmu_backlight_controller = {
293 pmu_set_backlight_enable,
294 pmu_set_backlight_level
295 };
296 #endif /* CONFIG_PMAC_BACKLIGHT */
297
298 int __openfirmware
299 find_via_pmu(void)
300 {
301 if (via != 0)
302 return 1;
303 vias = find_devices("via-pmu");
304 if (vias == 0)
305 return 0;
306 if (vias->next != 0)
307 printk(KERN_WARNING "Warning: only using 1st via-pmu\n");
308
309 if (vias->n_addrs < 1 || vias->n_intrs < 1) {
310 printk(KERN_ERR "via-pmu: %d addresses, %d interrupts!\n",
311 vias->n_addrs, vias->n_intrs);
312 if (vias->n_addrs < 1 || vias->n_intrs < 1)
313 return 0;
314 }
315
316 spin_lock_init(&pmu_lock);
317
318 pmu_has_adb = 1;
319
320 pmu_intr_mask = PMU_INT_PCEJECT |
321 PMU_INT_SNDBRT |
322 PMU_INT_ADB |
323 PMU_INT_TICK;
324
325 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
326 || device_is_compatible(vias->parent, "ohare")))
327 pmu_kind = PMU_OHARE_BASED;
328 else if (device_is_compatible(vias->parent, "paddington"))
329 pmu_kind = PMU_PADDINGTON_BASED;
330 else if (device_is_compatible(vias->parent, "heathrow"))
331 pmu_kind = PMU_HEATHROW_BASED;
332 else if (device_is_compatible(vias->parent, "Keylargo")
333 || device_is_compatible(vias->parent, "K2-Keylargo")) {
334 struct device_node *gpio, *gpiop;
335
336 pmu_kind = PMU_KEYLARGO_BASED;
337 pmu_has_adb = (find_type_devices("adb") != NULL);
338 pmu_intr_mask = PMU_INT_PCEJECT |
339 PMU_INT_SNDBRT |
340 PMU_INT_ADB |
341 PMU_INT_TICK |
342 PMU_INT_ENVIRONMENT;
343
344 gpiop = find_devices("gpio");
345 if (gpiop && gpiop->n_addrs) {
346 gpio_reg = ioremap(gpiop->addrs->address, 0x10);
347 gpio = find_devices("extint-gpio1");
348 if (gpio == NULL)
349 gpio = find_devices("pmu-interrupt");
350 if (gpio && gpio->parent == gpiop && gpio->n_intrs)
351 gpio_irq = gpio->intrs[0].line;
352 }
353 } else
354 pmu_kind = PMU_UNKNOWN;
355
356 via = ioremap(vias->addrs->address, 0x2000);
357
358 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
359 out_8(&via[IFR], 0x7f); /* clear IFR */
360
361 pmu_state = idle;
362
363 if (!init_pmu()) {
364 via = NULL;
365 return 0;
366 }
367
368 printk(KERN_INFO "PMU driver %d initialized for %s, firmware: %02x\n",
369 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
370
371 sys_ctrler = SYS_CTRLER_PMU;
372
373 return 1;
374 }
375
376 #ifdef CONFIG_ADB
377 static int __openfirmware
378 pmu_probe(void)
379 {
380 return vias == NULL? -ENODEV: 0;
381 }
382
383 static int __init
384 pmu_init(void)
385 {
386 if (vias == NULL)
387 return -ENODEV;
388 return 0;
389 }
390 #endif /* CONFIG_ADB */
391
392 /*
393 * We can't wait until pmu_init gets called, that happens too late.
394 * It happens after IDE and SCSI initialization, which can take a few
395 * seconds, and by that time the PMU could have given up on us and
396 * turned us off.
397 * Thus this is called with arch_initcall rather than device_initcall.
398 */
399 static int __init via_pmu_start(void)
400 {
401 if (vias == NULL)
402 return -ENODEV;
403
404 bright_req_1.complete = 1;
405 bright_req_2.complete = 1;
406 #ifdef CONFIG_PMAC_PBOOK
407 batt_req.complete = 1;
408 #endif
409
410 if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU",
411 (void *)0)) {
412 printk(KERN_ERR "VIA-PMU: can't get irq %d\n",
413 vias->intrs[0].line);
414 return -EAGAIN;
415 }
416
417 if (pmu_kind == PMU_KEYLARGO_BASED && gpio_irq != -1) {
418 if (request_irq(gpio_irq, gpio1_interrupt, 0, "GPIO1 ADB", (void *)0))
419 printk(KERN_ERR "pmu: can't get irq %d (GPIO1)\n", gpio_irq);
420 gpio_irq_enabled = 1;
421 }
422
423 /* Enable interrupts */
424 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
425
426 pmu_fully_inited = 1;
427
428 /* Make sure PMU settle down before continuing. This is _very_ important
429 * since the IDE probe may shut interrupts down for quite a bit of time. If
430 * a PMU communication is pending while this happens, the PMU may timeout
431 * Not that on Core99 machines, the PMU keeps sending us environement
432 * messages, we should find a way to either fix IDE or make it call
433 * pmu_suspend() before masking interrupts. This can also happens while
434 * scolling with some fbdevs.
435 */
436 do {
437 pmu_poll();
438 } while (pmu_state != idle);
439
440 return 0;
441 }
442
443 arch_initcall(via_pmu_start);
444
445 /*
446 * This has to be done after pci_init, which is a subsys_initcall.
447 */
448 static int __init via_pmu_dev_init(void)
449 {
450 if (vias == NULL)
451 return -ENODEV;
452
453 #ifndef CONFIG_PPC64
454 request_OF_resource(vias, 0, NULL);
455 #endif
456 #ifdef CONFIG_PMAC_BACKLIGHT
457 /* Enable backlight */
458 register_backlight_controller(&pmu_backlight_controller, NULL, "pmu");
459 #endif /* CONFIG_PMAC_BACKLIGHT */
460
461 #ifdef CONFIG_PMAC_PBOOK
462 if (machine_is_compatible("AAPL,3400/2400") ||
463 machine_is_compatible("AAPL,3500")) {
464 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
465 NULL, PMAC_MB_INFO_MODEL, 0);
466 pmu_battery_count = 1;
467 if (mb == PMAC_TYPE_COMET)
468 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
469 else
470 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
471 } else if (machine_is_compatible("AAPL,PowerBook1998") ||
472 machine_is_compatible("PowerBook1,1")) {
473 pmu_battery_count = 2;
474 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
475 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
476 } else {
477 struct device_node* prim = find_devices("power-mgt");
478 u32 *prim_info = NULL;
479 if (prim)
480 prim_info = (u32 *)get_property(prim, "prim-info", NULL);
481 if (prim_info) {
482 /* Other stuffs here yet unknown */
483 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
484 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
485 if (pmu_battery_count > 1)
486 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
487 }
488 }
489 #endif /* CONFIG_PMAC_PBOOK */
490 /* Create /proc/pmu */
491 proc_pmu_root = proc_mkdir("pmu", NULL);
492 if (proc_pmu_root) {
493 #ifdef CONFIG_PMAC_PBOOK
494 int i;
495
496 for (i=0; i<pmu_battery_count; i++) {
497 char title[16];
498 sprintf(title, "battery_%d", i);
499 proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
500 proc_get_batt, (void *)i);
501 }
502 #endif /* CONFIG_PMAC_PBOOK */
503
504 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
505 proc_get_info, NULL);
506 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
507 proc_get_irqstats, NULL);
508 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
509 if (proc_pmu_options) {
510 proc_pmu_options->nlink = 1;
511 proc_pmu_options->read_proc = proc_read_options;
512 proc_pmu_options->write_proc = proc_write_options;
513 }
514 }
515 return 0;
516 }
517
518 device_initcall(via_pmu_dev_init);
519
520 static int __openfirmware
521 init_pmu(void)
522 {
523 int timeout;
524 struct adb_request req;
525
526 out_8(&via[B], via[B] | TREQ); /* negate TREQ */
527 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */
528
529 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
530 timeout = 100000;
531 while (!req.complete) {
532 if (--timeout < 0) {
533 printk(KERN_ERR "init_pmu: no response from PMU\n");
534 return 0;
535 }
536 udelay(10);
537 pmu_poll();
538 }
539
540 /* ack all pending interrupts */
541 timeout = 100000;
542 interrupt_data[0][0] = 1;
543 while (interrupt_data[0][0] || pmu_state != idle) {
544 if (--timeout < 0) {
545 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
546 return 0;
547 }
548 if (pmu_state == idle)
549 adb_int_pending = 1;
550 via_pmu_interrupt(0, NULL, NULL);
551 udelay(10);
552 }
553
554 /* Tell PMU we are ready. */
555 if (pmu_kind == PMU_KEYLARGO_BASED) {
556 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
557 while (!req.complete)
558 pmu_poll();
559 }
560
561 /* Read PMU version */
562 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
563 pmu_wait_complete(&req);
564 if (req.reply_len > 0)
565 pmu_version = req.reply[0];
566
567 /* Read server mode setting */
568 if (pmu_kind == PMU_KEYLARGO_BASED) {
569 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
570 PMU_PWR_GET_POWERUP_EVENTS);
571 pmu_wait_complete(&req);
572 if (req.reply_len == 2) {
573 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
574 option_server_mode = 1;
575 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
576 option_server_mode ? "enabled" : "disabled");
577 }
578 }
579 return 1;
580 }
581
582 int
583 pmu_get_model(void)
584 {
585 return pmu_kind;
586 }
587
588 #ifndef CONFIG_PPC64
589 static inline void wakeup_decrementer(void)
590 {
591 set_dec(tb_ticks_per_jiffy);
592 /* No currently-supported powerbook has a 601,
593 * so use get_tbl, not native
594 */
595 last_jiffy_stamp(0) = tb_last_stamp = get_tbl();
596 }
597 #endif
598
599 static void pmu_set_server_mode(int server_mode)
600 {
601 struct adb_request req;
602
603 if (pmu_kind != PMU_KEYLARGO_BASED)
604 return;
605
606 option_server_mode = server_mode;
607 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
608 pmu_wait_complete(&req);
609 if (req.reply_len < 2)
610 return;
611 if (server_mode)
612 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
613 PMU_PWR_SET_POWERUP_EVENTS,
614 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
615 else
616 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
617 PMU_PWR_CLR_POWERUP_EVENTS,
618 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
619 pmu_wait_complete(&req);
620 }
621
622 #ifdef CONFIG_PMAC_PBOOK
623
624 /* This new version of the code for 2400/3400/3500 powerbooks
625 * is inspired from the implementation in gkrellm-pmu
626 */
627 static void __pmac
628 done_battery_state_ohare(struct adb_request* req)
629 {
630 /* format:
631 * [0] : flags
632 * 0x01 : AC indicator
633 * 0x02 : charging
634 * 0x04 : battery exist
635 * 0x08 :
636 * 0x10 :
637 * 0x20 : full charged
638 * 0x40 : pcharge reset
639 * 0x80 : battery exist
640 *
641 * [1][2] : battery voltage
642 * [3] : CPU temperature
643 * [4] : battery temperature
644 * [5] : current
645 * [6][7] : pcharge
646 * --tkoba
647 */
648 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
649 long pcharge, charge, vb, vmax, lmax;
650 long vmax_charging, vmax_charged;
651 long amperage, voltage, time, max;
652 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
653 NULL, PMAC_MB_INFO_MODEL, 0);
654
655 if (req->reply[0] & 0x01)
656 pmu_power_flags |= PMU_PWR_AC_PRESENT;
657 else
658 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
659
660 if (mb == PMAC_TYPE_COMET) {
661 vmax_charged = 189;
662 vmax_charging = 213;
663 lmax = 6500;
664 } else {
665 vmax_charged = 330;
666 vmax_charging = 330;
667 lmax = 6500;
668 }
669 vmax = vmax_charged;
670
671 /* If battery installed */
672 if (req->reply[0] & 0x04) {
673 bat_flags |= PMU_BATT_PRESENT;
674 if (req->reply[0] & 0x02)
675 bat_flags |= PMU_BATT_CHARGING;
676 vb = (req->reply[1] << 8) | req->reply[2];
677 voltage = (vb * 265 + 72665) / 10;
678 amperage = req->reply[5];
679 if ((req->reply[0] & 0x01) == 0) {
680 if (amperage > 200)
681 vb += ((amperage - 200) * 15)/100;
682 } else if (req->reply[0] & 0x02) {
683 vb = (vb * 97) / 100;
684 vmax = vmax_charging;
685 }
686 charge = (100 * vb) / vmax;
687 if (req->reply[0] & 0x40) {
688 pcharge = (req->reply[6] << 8) + req->reply[7];
689 if (pcharge > lmax)
690 pcharge = lmax;
691 pcharge *= 100;
692 pcharge = 100 - pcharge / lmax;
693 if (pcharge < charge)
694 charge = pcharge;
695 }
696 if (amperage > 0)
697 time = (charge * 16440) / amperage;
698 else
699 time = 0;
700 max = 100;
701 amperage = -amperage;
702 } else
703 charge = max = amperage = voltage = time = 0;
704
705 pmu_batteries[pmu_cur_battery].flags = bat_flags;
706 pmu_batteries[pmu_cur_battery].charge = charge;
707 pmu_batteries[pmu_cur_battery].max_charge = max;
708 pmu_batteries[pmu_cur_battery].amperage = amperage;
709 pmu_batteries[pmu_cur_battery].voltage = voltage;
710 pmu_batteries[pmu_cur_battery].time_remaining = time;
711
712 clear_bit(0, &async_req_locks);
713 }
714
715 static void __pmac
716 done_battery_state_smart(struct adb_request* req)
717 {
718 /* format:
719 * [0] : format of this structure (known: 3,4,5)
720 * [1] : flags
721 *
722 * format 3 & 4:
723 *
724 * [2] : charge
725 * [3] : max charge
726 * [4] : current
727 * [5] : voltage
728 *
729 * format 5:
730 *
731 * [2][3] : charge
732 * [4][5] : max charge
733 * [6][7] : current
734 * [8][9] : voltage
735 */
736
737 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
738 int amperage;
739 unsigned int capa, max, voltage;
740
741 if (req->reply[1] & 0x01)
742 pmu_power_flags |= PMU_PWR_AC_PRESENT;
743 else
744 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
745
746
747 capa = max = amperage = voltage = 0;
748
749 if (req->reply[1] & 0x04) {
750 bat_flags |= PMU_BATT_PRESENT;
751 switch(req->reply[0]) {
752 case 3:
753 case 4: capa = req->reply[2];
754 max = req->reply[3];
755 amperage = *((signed char *)&req->reply[4]);
756 voltage = req->reply[5];
757 break;
758 case 5: capa = (req->reply[2] << 8) | req->reply[3];
759 max = (req->reply[4] << 8) | req->reply[5];
760 amperage = *((signed short *)&req->reply[6]);
761 voltage = (req->reply[8] << 8) | req->reply[9];
762 break;
763 default:
764 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
765 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
766 break;
767 }
768 }
769
770 if ((req->reply[1] & 0x01) && (amperage > 0))
771 bat_flags |= PMU_BATT_CHARGING;
772
773 pmu_batteries[pmu_cur_battery].flags = bat_flags;
774 pmu_batteries[pmu_cur_battery].charge = capa;
775 pmu_batteries[pmu_cur_battery].max_charge = max;
776 pmu_batteries[pmu_cur_battery].amperage = amperage;
777 pmu_batteries[pmu_cur_battery].voltage = voltage;
778 if (amperage) {
779 if ((req->reply[1] & 0x01) && (amperage > 0))
780 pmu_batteries[pmu_cur_battery].time_remaining
781 = ((max-capa) * 3600) / amperage;
782 else
783 pmu_batteries[pmu_cur_battery].time_remaining
784 = (capa * 3600) / (-amperage);
785 } else
786 pmu_batteries[pmu_cur_battery].time_remaining = 0;
787
788 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
789
790 clear_bit(0, &async_req_locks);
791 }
792
793 static void __pmac
794 query_battery_state(void)
795 {
796 if (test_and_set_bit(0, &async_req_locks))
797 return;
798 if (pmu_kind == PMU_OHARE_BASED)
799 pmu_request(&batt_req, done_battery_state_ohare,
800 1, PMU_BATTERY_STATE);
801 else
802 pmu_request(&batt_req, done_battery_state_smart,
803 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
804 }
805
806 #endif /* CONFIG_PMAC_PBOOK */
807
808 static int __pmac
809 proc_get_info(char *page, char **start, off_t off,
810 int count, int *eof, void *data)
811 {
812 char* p = page;
813
814 p += sprintf(p, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
815 p += sprintf(p, "PMU firmware version : %02x\n", pmu_version);
816 #ifdef CONFIG_PMAC_PBOOK
817 p += sprintf(p, "AC Power : %d\n",
818 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0));
819 p += sprintf(p, "Battery count : %d\n", pmu_battery_count);
820 #endif /* CONFIG_PMAC_PBOOK */
821
822 return p - page;
823 }
824
825 static int __pmac
826 proc_get_irqstats(char *page, char **start, off_t off,
827 int count, int *eof, void *data)
828 {
829 int i;
830 char* p = page;
831 static const char *irq_names[] = {
832 "Total CB1 triggered events",
833 "Total GPIO1 triggered events",
834 "PC-Card eject button",
835 "Sound/Brightness button",
836 "ADB message",
837 "Battery state change",
838 "Environment interrupt",
839 "Tick timer",
840 "Ghost interrupt (zero len)",
841 "Empty interrupt (empty mask)",
842 "Max irqs in a row"
843 };
844
845 for (i=0; i<11; i++) {
846 p += sprintf(p, " %2u: %10u (%s)\n",
847 i, pmu_irq_stats[i], irq_names[i]);
848 }
849 return p - page;
850 }
851
852 #ifdef CONFIG_PMAC_PBOOK
853 static int __pmac
854 proc_get_batt(char *page, char **start, off_t off,
855 int count, int *eof, void *data)
856 {
857 int batnum = (int)data;
858 char *p = page;
859
860 p += sprintf(p, "\n");
861 p += sprintf(p, "flags : %08x\n",
862 pmu_batteries[batnum].flags);
863 p += sprintf(p, "charge : %d\n",
864 pmu_batteries[batnum].charge);
865 p += sprintf(p, "max_charge : %d\n",
866 pmu_batteries[batnum].max_charge);
867 p += sprintf(p, "current : %d\n",
868 pmu_batteries[batnum].amperage);
869 p += sprintf(p, "voltage : %d\n",
870 pmu_batteries[batnum].voltage);
871 p += sprintf(p, "time rem. : %d\n",
872 pmu_batteries[batnum].time_remaining);
873
874 return p - page;
875 }
876 #endif /* CONFIG_PMAC_PBOOK */
877
878 static int __pmac
879 proc_read_options(char *page, char **start, off_t off,
880 int count, int *eof, void *data)
881 {
882 char *p = page;
883
884 #ifdef CONFIG_PMAC_PBOOK
885 if (pmu_kind == PMU_KEYLARGO_BASED &&
886 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
887 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
888 #endif /* CONFIG_PMAC_PBOOK */
889 if (pmu_kind == PMU_KEYLARGO_BASED)
890 p += sprintf(p, "server_mode=%d\n", option_server_mode);
891
892 return p - page;
893 }
894
895 static int __pmac
896 proc_write_options(struct file *file, const char __user *buffer,
897 unsigned long count, void *data)
898 {
899 char tmp[33];
900 char *label, *val;
901 unsigned long fcount = count;
902
903 if (!count)
904 return -EINVAL;
905 if (count > 32)
906 count = 32;
907 if (copy_from_user(tmp, buffer, count))
908 return -EFAULT;
909 tmp[count] = 0;
910
911 label = tmp;
912 while(*label == ' ')
913 label++;
914 val = label;
915 while(*val && (*val != '=')) {
916 if (*val == ' ')
917 *val = 0;
918 val++;
919 }
920 if ((*val) == 0)
921 return -EINVAL;
922 *(val++) = 0;
923 while(*val == ' ')
924 val++;
925 #ifdef CONFIG_PMAC_PBOOK
926 if (pmu_kind == PMU_KEYLARGO_BASED &&
927 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
928 if (!strcmp(label, "lid_wakeup"))
929 option_lid_wakeup = ((*val) == '1');
930 #endif /* CONFIG_PMAC_PBOOK */
931 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
932 int new_value;
933 new_value = ((*val) == '1');
934 if (new_value != option_server_mode)
935 pmu_set_server_mode(new_value);
936 }
937 return fcount;
938 }
939
940 #ifdef CONFIG_ADB
941 /* Send an ADB command */
942 static int __pmac
943 pmu_send_request(struct adb_request *req, int sync)
944 {
945 int i, ret;
946
947 if ((vias == NULL) || (!pmu_fully_inited)) {
948 req->complete = 1;
949 return -ENXIO;
950 }
951
952 ret = -EINVAL;
953
954 switch (req->data[0]) {
955 case PMU_PACKET:
956 for (i = 0; i < req->nbytes - 1; ++i)
957 req->data[i] = req->data[i+1];
958 --req->nbytes;
959 if (pmu_data_len[req->data[0]][1] != 0) {
960 req->reply[0] = ADB_RET_OK;
961 req->reply_len = 1;
962 } else
963 req->reply_len = 0;
964 ret = pmu_queue_request(req);
965 break;
966 case CUDA_PACKET:
967 switch (req->data[1]) {
968 case CUDA_GET_TIME:
969 if (req->nbytes != 2)
970 break;
971 req->data[0] = PMU_READ_RTC;
972 req->nbytes = 1;
973 req->reply_len = 3;
974 req->reply[0] = CUDA_PACKET;
975 req->reply[1] = 0;
976 req->reply[2] = CUDA_GET_TIME;
977 ret = pmu_queue_request(req);
978 break;
979 case CUDA_SET_TIME:
980 if (req->nbytes != 6)
981 break;
982 req->data[0] = PMU_SET_RTC;
983 req->nbytes = 5;
984 for (i = 1; i <= 4; ++i)
985 req->data[i] = req->data[i+1];
986 req->reply_len = 3;
987 req->reply[0] = CUDA_PACKET;
988 req->reply[1] = 0;
989 req->reply[2] = CUDA_SET_TIME;
990 ret = pmu_queue_request(req);
991 break;
992 }
993 break;
994 case ADB_PACKET:
995 if (!pmu_has_adb)
996 return -ENXIO;
997 for (i = req->nbytes - 1; i > 1; --i)
998 req->data[i+2] = req->data[i];
999 req->data[3] = req->nbytes - 2;
1000 req->data[2] = pmu_adb_flags;
1001 /*req->data[1] = req->data[1];*/
1002 req->data[0] = PMU_ADB_CMD;
1003 req->nbytes += 2;
1004 req->reply_expected = 1;
1005 req->reply_len = 0;
1006 ret = pmu_queue_request(req);
1007 break;
1008 }
1009 if (ret) {
1010 req->complete = 1;
1011 return ret;
1012 }
1013
1014 if (sync)
1015 while (!req->complete)
1016 pmu_poll();
1017
1018 return 0;
1019 }
1020
1021 /* Enable/disable autopolling */
1022 static int __pmac
1023 pmu_adb_autopoll(int devs)
1024 {
1025 struct adb_request req;
1026
1027 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1028 return -ENXIO;
1029
1030 if (devs) {
1031 adb_dev_map = devs;
1032 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1033 adb_dev_map >> 8, adb_dev_map);
1034 pmu_adb_flags = 2;
1035 } else {
1036 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1037 pmu_adb_flags = 0;
1038 }
1039 while (!req.complete)
1040 pmu_poll();
1041 return 0;
1042 }
1043
1044 /* Reset the ADB bus */
1045 static int __pmac
1046 pmu_adb_reset_bus(void)
1047 {
1048 struct adb_request req;
1049 int save_autopoll = adb_dev_map;
1050
1051 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1052 return -ENXIO;
1053
1054 /* anyone got a better idea?? */
1055 pmu_adb_autopoll(0);
1056
1057 req.nbytes = 5;
1058 req.done = NULL;
1059 req.data[0] = PMU_ADB_CMD;
1060 req.data[1] = 0;
1061 req.data[2] = ADB_BUSRESET;
1062 req.data[3] = 0;
1063 req.data[4] = 0;
1064 req.reply_len = 0;
1065 req.reply_expected = 1;
1066 if (pmu_queue_request(&req) != 0) {
1067 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1068 return -EIO;
1069 }
1070 pmu_wait_complete(&req);
1071
1072 if (save_autopoll != 0)
1073 pmu_adb_autopoll(save_autopoll);
1074
1075 return 0;
1076 }
1077 #endif /* CONFIG_ADB */
1078
1079 /* Construct and send a pmu request */
1080 int __openfirmware
1081 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1082 int nbytes, ...)
1083 {
1084 va_list list;
1085 int i;
1086
1087 if (vias == NULL)
1088 return -ENXIO;
1089
1090 if (nbytes < 0 || nbytes > 32) {
1091 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1092 req->complete = 1;
1093 return -EINVAL;
1094 }
1095 req->nbytes = nbytes;
1096 req->done = done;
1097 va_start(list, nbytes);
1098 for (i = 0; i < nbytes; ++i)
1099 req->data[i] = va_arg(list, int);
1100 va_end(list);
1101 req->reply_len = 0;
1102 req->reply_expected = 0;
1103 return pmu_queue_request(req);
1104 }
1105
1106 int __pmac
1107 pmu_queue_request(struct adb_request *req)
1108 {
1109 unsigned long flags;
1110 int nsend;
1111
1112 if (via == NULL) {
1113 req->complete = 1;
1114 return -ENXIO;
1115 }
1116 if (req->nbytes <= 0) {
1117 req->complete = 1;
1118 return 0;
1119 }
1120 nsend = pmu_data_len[req->data[0]][0];
1121 if (nsend >= 0 && req->nbytes != nsend + 1) {
1122 req->complete = 1;
1123 return -EINVAL;
1124 }
1125
1126 req->next = NULL;
1127 req->sent = 0;
1128 req->complete = 0;
1129
1130 spin_lock_irqsave(&pmu_lock, flags);
1131 if (current_req != 0) {
1132 last_req->next = req;
1133 last_req = req;
1134 } else {
1135 current_req = req;
1136 last_req = req;
1137 if (pmu_state == idle)
1138 pmu_start();
1139 }
1140 spin_unlock_irqrestore(&pmu_lock, flags);
1141
1142 return 0;
1143 }
1144
1145 static inline void
1146 wait_for_ack(void)
1147 {
1148 /* Sightly increased the delay, I had one occurrence of the message
1149 * reported
1150 */
1151 int timeout = 4000;
1152 while ((in_8(&via[B]) & TACK) == 0) {
1153 if (--timeout < 0) {
1154 printk(KERN_ERR "PMU not responding (!ack)\n");
1155 return;
1156 }
1157 udelay(10);
1158 }
1159 }
1160
1161 /* New PMU seems to be very sensitive to those timings, so we make sure
1162 * PCI is flushed immediately */
1163 static inline void
1164 send_byte(int x)
1165 {
1166 volatile unsigned char __iomem *v = via;
1167
1168 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1169 out_8(&v[SR], x);
1170 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
1171 (void)in_8(&v[B]);
1172 }
1173
1174 static inline void
1175 recv_byte(void)
1176 {
1177 volatile unsigned char __iomem *v = via;
1178
1179 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1180 in_8(&v[SR]); /* resets SR */
1181 out_8(&v[B], in_8(&v[B]) & ~TREQ);
1182 (void)in_8(&v[B]);
1183 }
1184
1185 static inline void
1186 pmu_done(struct adb_request *req)
1187 {
1188 void (*done)(struct adb_request *) = req->done;
1189 mb();
1190 req->complete = 1;
1191 /* Here, we assume that if the request has a done member, the
1192 * struct request will survive to setting req->complete to 1
1193 */
1194 if (done)
1195 (*done)(req);
1196 }
1197
1198 static void __pmac
1199 pmu_start(void)
1200 {
1201 struct adb_request *req;
1202
1203 /* assert pmu_state == idle */
1204 /* get the packet to send */
1205 req = current_req;
1206 if (req == 0 || pmu_state != idle
1207 || (/*req->reply_expected && */req_awaiting_reply))
1208 return;
1209
1210 pmu_state = sending;
1211 data_index = 1;
1212 data_len = pmu_data_len[req->data[0]][0];
1213
1214 /* Sounds safer to make sure ACK is high before writing. This helped
1215 * kill a problem with ADB and some iBooks
1216 */
1217 wait_for_ack();
1218 /* set the shift register to shift out and send a byte */
1219 send_byte(req->data[0]);
1220 }
1221
1222 void __openfirmware
1223 pmu_poll(void)
1224 {
1225 if (!via)
1226 return;
1227 if (disable_poll)
1228 return;
1229 via_pmu_interrupt(0, NULL, NULL);
1230 }
1231
1232 void __openfirmware
1233 pmu_poll_adb(void)
1234 {
1235 if (!via)
1236 return;
1237 if (disable_poll)
1238 return;
1239 /* Kicks ADB read when PMU is suspended */
1240 adb_int_pending = 1;
1241 do {
1242 via_pmu_interrupt(0, NULL, NULL);
1243 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1244 || req_awaiting_reply));
1245 }
1246
1247 void __openfirmware
1248 pmu_wait_complete(struct adb_request *req)
1249 {
1250 if (!via)
1251 return;
1252 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1253 via_pmu_interrupt(0, NULL, NULL);
1254 }
1255
1256 /* This function loops until the PMU is idle and prevents it from
1257 * anwsering to ADB interrupts. pmu_request can still be called.
1258 * This is done to avoid spurrious shutdowns when we know we'll have
1259 * interrupts switched off for a long time
1260 */
1261 void __openfirmware
1262 pmu_suspend(void)
1263 {
1264 unsigned long flags;
1265 #ifdef SUSPEND_USES_PMU
1266 struct adb_request *req;
1267 #endif
1268 if (!via)
1269 return;
1270
1271 spin_lock_irqsave(&pmu_lock, flags);
1272 pmu_suspended++;
1273 if (pmu_suspended > 1) {
1274 spin_unlock_irqrestore(&pmu_lock, flags);
1275 return;
1276 }
1277
1278 do {
1279 spin_unlock_irqrestore(&pmu_lock, flags);
1280 if (req_awaiting_reply)
1281 adb_int_pending = 1;
1282 via_pmu_interrupt(0, NULL, NULL);
1283 spin_lock_irqsave(&pmu_lock, flags);
1284 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1285 #ifdef SUSPEND_USES_PMU
1286 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1287 spin_unlock_irqrestore(&pmu_lock, flags);
1288 while(!req.complete)
1289 pmu_poll();
1290 #else /* SUSPEND_USES_PMU */
1291 if (gpio_irq >= 0)
1292 disable_irq_nosync(gpio_irq);
1293 out_8(&via[IER], CB1_INT | IER_CLR);
1294 spin_unlock_irqrestore(&pmu_lock, flags);
1295 #endif /* SUSPEND_USES_PMU */
1296 break;
1297 }
1298 } while (1);
1299 }
1300
1301 void __openfirmware
1302 pmu_resume(void)
1303 {
1304 unsigned long flags;
1305
1306 if (!via || (pmu_suspended < 1))
1307 return;
1308
1309 spin_lock_irqsave(&pmu_lock, flags);
1310 pmu_suspended--;
1311 if (pmu_suspended > 0) {
1312 spin_unlock_irqrestore(&pmu_lock, flags);
1313 return;
1314 }
1315 adb_int_pending = 1;
1316 #ifdef SUSPEND_USES_PMU
1317 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1318 spin_unlock_irqrestore(&pmu_lock, flags);
1319 while(!req.complete)
1320 pmu_poll();
1321 #else /* SUSPEND_USES_PMU */
1322 if (gpio_irq >= 0)
1323 enable_irq(gpio_irq);
1324 out_8(&via[IER], CB1_INT | IER_SET);
1325 spin_unlock_irqrestore(&pmu_lock, flags);
1326 pmu_poll();
1327 #endif /* SUSPEND_USES_PMU */
1328 }
1329
1330 /* Interrupt data could be the result data from an ADB cmd */
1331 static void __pmac
1332 pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs)
1333 {
1334 unsigned char ints, pirq;
1335 int i = 0;
1336
1337 asleep = 0;
1338 if (drop_interrupts || len < 1) {
1339 adb_int_pending = 0;
1340 pmu_irq_stats[8]++;
1341 return;
1342 }
1343
1344 /* Get PMU interrupt mask */
1345 ints = data[0];
1346
1347 /* Record zero interrupts for stats */
1348 if (ints == 0)
1349 pmu_irq_stats[9]++;
1350
1351 /* Hack to deal with ADB autopoll flag */
1352 if (ints & PMU_INT_ADB)
1353 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1354
1355 next:
1356
1357 if (ints == 0) {
1358 if (i > pmu_irq_stats[10])
1359 pmu_irq_stats[10] = i;
1360 return;
1361 }
1362
1363 for (pirq = 0; pirq < 8; pirq++)
1364 if (ints & (1 << pirq))
1365 break;
1366 pmu_irq_stats[pirq]++;
1367 i++;
1368 ints &= ~(1 << pirq);
1369
1370 /* Note: for some reason, we get an interrupt with len=1,
1371 * data[0]==0 after each normal ADB interrupt, at least
1372 * on the Pismo. Still investigating... --BenH
1373 */
1374 if ((1 << pirq) & PMU_INT_ADB) {
1375 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1376 struct adb_request *req = req_awaiting_reply;
1377 if (req == 0) {
1378 printk(KERN_ERR "PMU: extra ADB reply\n");
1379 return;
1380 }
1381 req_awaiting_reply = NULL;
1382 if (len <= 2)
1383 req->reply_len = 0;
1384 else {
1385 memcpy(req->reply, data + 1, len - 1);
1386 req->reply_len = len - 1;
1387 }
1388 pmu_done(req);
1389 } else {
1390 #if defined(CONFIG_XMON) && !defined(CONFIG_PPC64)
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 #endif /* defined(CONFIG_XMON) && !defined(CONFIG_PPC64) */
1399 #ifdef CONFIG_ADB
1400 /*
1401 * XXX On the [23]400 the PMU gives us an up
1402 * event for keycodes 0x74 or 0x75 when the PC
1403 * card eject buttons are released, so we
1404 * ignore those events.
1405 */
1406 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1407 && data[1] == 0x2c && data[3] == 0xff
1408 && (data[2] & ~1) == 0xf4))
1409 adb_input(data+1, len-1, regs, 1);
1410 #endif /* CONFIG_ADB */
1411 }
1412 }
1413 /* Sound/brightness button pressed */
1414 else if ((1 << pirq) & PMU_INT_SNDBRT) {
1415 #ifdef CONFIG_PMAC_BACKLIGHT
1416 if (len == 3)
1417 #ifdef CONFIG_INPUT_ADBHID
1418 if (!disable_kernel_backlight)
1419 #endif /* CONFIG_INPUT_ADBHID */
1420 set_backlight_level(data[1] >> 4);
1421 #endif /* CONFIG_PMAC_BACKLIGHT */
1422 }
1423 /* Tick interrupt */
1424 else if ((1 << pirq) & PMU_INT_TICK) {
1425 #ifdef CONFIG_PMAC_PBOOK
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 } else {
1439 pmu_pass_intr(data, len);
1440 #endif /* CONFIG_PMAC_PBOOK */
1441 }
1442 goto next;
1443 }
1444
1445 static struct adb_request* __pmac
1446 pmu_sr_intr(struct pt_regs *regs)
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 explicitely 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 __pmac
1552 via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs)
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(regs);
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], regs);
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 __pmac
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 __pmac
1653 gpio1_interrupt(int irq, void *arg, struct pt_regs *regs)
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, NULL);
1667 return IRQ_HANDLED;
1668 }
1669 return IRQ_NONE;
1670 }
1671
1672 #ifdef CONFIG_PMAC_BACKLIGHT
1673 static int backlight_to_bright[] __pmacdata = {
1674 0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e,
1675 0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e
1676 };
1677
1678 static int __openfirmware
1679 pmu_set_backlight_enable(int on, int level, void* data)
1680 {
1681 struct adb_request req;
1682
1683 if (vias == NULL)
1684 return -ENODEV;
1685
1686 if (on) {
1687 pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
1688 backlight_to_bright[level]);
1689 pmu_wait_complete(&req);
1690 }
1691 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1692 PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF));
1693 pmu_wait_complete(&req);
1694
1695 return 0;
1696 }
1697
1698 static void __openfirmware
1699 pmu_bright_complete(struct adb_request *req)
1700 {
1701 if (req == &bright_req_1)
1702 clear_bit(1, &async_req_locks);
1703 if (req == &bright_req_2)
1704 clear_bit(2, &async_req_locks);
1705 }
1706
1707 static int __openfirmware
1708 pmu_set_backlight_level(int level, void* data)
1709 {
1710 if (vias == NULL)
1711 return -ENODEV;
1712
1713 if (test_and_set_bit(1, &async_req_locks))
1714 return -EAGAIN;
1715 pmu_request(&bright_req_1, pmu_bright_complete, 2, PMU_BACKLIGHT_BRIGHT,
1716 backlight_to_bright[level]);
1717 if (test_and_set_bit(2, &async_req_locks))
1718 return -EAGAIN;
1719 pmu_request(&bright_req_2, pmu_bright_complete, 2, PMU_POWER_CTRL,
1720 PMU_POW_BACKLIGHT | (level > BACKLIGHT_OFF ?
1721 PMU_POW_ON : PMU_POW_OFF));
1722
1723 return 0;
1724 }
1725 #endif /* CONFIG_PMAC_BACKLIGHT */
1726
1727 void __pmac
1728 pmu_enable_irled(int on)
1729 {
1730 struct adb_request req;
1731
1732 if (vias == NULL)
1733 return ;
1734 if (pmu_kind == PMU_KEYLARGO_BASED)
1735 return ;
1736
1737 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1738 (on ? PMU_POW_ON : PMU_POW_OFF));
1739 pmu_wait_complete(&req);
1740 }
1741
1742 void __pmac
1743 pmu_restart(void)
1744 {
1745 struct adb_request req;
1746
1747 if (via == NULL)
1748 return;
1749
1750 local_irq_disable();
1751
1752 drop_interrupts = 1;
1753
1754 if (pmu_kind != PMU_KEYLARGO_BASED) {
1755 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1756 PMU_INT_TICK );
1757 while(!req.complete)
1758 pmu_poll();
1759 }
1760
1761 pmu_request(&req, NULL, 1, PMU_RESET);
1762 pmu_wait_complete(&req);
1763 for (;;)
1764 ;
1765 }
1766
1767 void __pmac
1768 pmu_shutdown(void)
1769 {
1770 struct adb_request req;
1771
1772 if (via == NULL)
1773 return;
1774
1775 local_irq_disable();
1776
1777 drop_interrupts = 1;
1778
1779 if (pmu_kind != PMU_KEYLARGO_BASED) {
1780 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1781 PMU_INT_TICK );
1782 pmu_wait_complete(&req);
1783 } else {
1784 /* Disable server mode on shutdown or we'll just
1785 * wake up again
1786 */
1787 pmu_set_server_mode(0);
1788 }
1789
1790 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1791 'M', 'A', 'T', 'T');
1792 pmu_wait_complete(&req);
1793 for (;;)
1794 ;
1795 }
1796
1797 int
1798 pmu_present(void)
1799 {
1800 return via != 0;
1801 }
1802
1803 struct pmu_i2c_hdr {
1804 u8 bus;
1805 u8 mode;
1806 u8 bus2;
1807 u8 address;
1808 u8 sub_addr;
1809 u8 comb_addr;
1810 u8 count;
1811 };
1812
1813 int
1814 pmu_i2c_combined_read(int bus, int addr, int subaddr, u8* data, int len)
1815 {
1816 struct adb_request req;
1817 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1];
1818 int retry;
1819 int rc;
1820
1821 for (retry=0; retry<16; retry++) {
1822 memset(&req, 0, sizeof(req));
1823
1824 hdr->bus = bus;
1825 hdr->address = addr & 0xfe;
1826 hdr->mode = PMU_I2C_MODE_COMBINED;
1827 hdr->bus2 = 0;
1828 hdr->sub_addr = subaddr;
1829 hdr->comb_addr = addr | 1;
1830 hdr->count = len;
1831
1832 req.nbytes = sizeof(struct pmu_i2c_hdr) + 1;
1833 req.reply_expected = 0;
1834 req.reply_len = 0;
1835 req.data[0] = PMU_I2C_CMD;
1836 req.reply[0] = 0xff;
1837 rc = pmu_queue_request(&req);
1838 if (rc)
1839 return rc;
1840 while(!req.complete)
1841 pmu_poll();
1842 if (req.reply[0] == PMU_I2C_STATUS_OK)
1843 break;
1844 mdelay(15);
1845 }
1846 if (req.reply[0] != PMU_I2C_STATUS_OK)
1847 return -1;
1848
1849 for (retry=0; retry<16; retry++) {
1850 memset(&req, 0, sizeof(req));
1851
1852 mdelay(15);
1853
1854 hdr->bus = PMU_I2C_BUS_STATUS;
1855 req.reply[0] = 0xff;
1856
1857 req.nbytes = 2;
1858 req.reply_expected = 0;
1859 req.reply_len = 0;
1860 req.data[0] = PMU_I2C_CMD;
1861 rc = pmu_queue_request(&req);
1862 if (rc)
1863 return rc;
1864 while(!req.complete)
1865 pmu_poll();
1866 if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) {
1867 memcpy(data, &req.reply[1], req.reply_len - 1);
1868 return req.reply_len - 1;
1869 }
1870 }
1871 return -1;
1872 }
1873
1874 int
1875 pmu_i2c_stdsub_write(int bus, int addr, int subaddr, u8* data, int len)
1876 {
1877 struct adb_request req;
1878 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1];
1879 int retry;
1880 int rc;
1881
1882 for (retry=0; retry<16; retry++) {
1883 memset(&req, 0, sizeof(req));
1884
1885 hdr->bus = bus;
1886 hdr->address = addr & 0xfe;
1887 hdr->mode = PMU_I2C_MODE_STDSUB;
1888 hdr->bus2 = 0;
1889 hdr->sub_addr = subaddr;
1890 hdr->comb_addr = addr & 0xfe;
1891 hdr->count = len;
1892
1893 req.data[0] = PMU_I2C_CMD;
1894 memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len);
1895 req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1;
1896 req.reply_expected = 0;
1897 req.reply_len = 0;
1898 req.reply[0] = 0xff;
1899 rc = pmu_queue_request(&req);
1900 if (rc)
1901 return rc;
1902 while(!req.complete)
1903 pmu_poll();
1904 if (req.reply[0] == PMU_I2C_STATUS_OK)
1905 break;
1906 mdelay(15);
1907 }
1908 if (req.reply[0] != PMU_I2C_STATUS_OK)
1909 return -1;
1910
1911 for (retry=0; retry<16; retry++) {
1912 memset(&req, 0, sizeof(req));
1913
1914 mdelay(15);
1915
1916 hdr->bus = PMU_I2C_BUS_STATUS;
1917 req.reply[0] = 0xff;
1918
1919 req.nbytes = 2;
1920 req.reply_expected = 0;
1921 req.reply_len = 0;
1922 req.data[0] = PMU_I2C_CMD;
1923 rc = pmu_queue_request(&req);
1924 if (rc)
1925 return rc;
1926 while(!req.complete)
1927 pmu_poll();
1928 if (req.reply[0] == PMU_I2C_STATUS_OK)
1929 return len;
1930 }
1931 return -1;
1932 }
1933
1934 int
1935 pmu_i2c_simple_read(int bus, int addr, u8* data, int len)
1936 {
1937 struct adb_request req;
1938 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1];
1939 int retry;
1940 int rc;
1941
1942 for (retry=0; retry<16; retry++) {
1943 memset(&req, 0, sizeof(req));
1944
1945 hdr->bus = bus;
1946 hdr->address = addr | 1;
1947 hdr->mode = PMU_I2C_MODE_SIMPLE;
1948 hdr->bus2 = 0;
1949 hdr->sub_addr = 0;
1950 hdr->comb_addr = 0;
1951 hdr->count = len;
1952
1953 req.data[0] = PMU_I2C_CMD;
1954 req.nbytes = sizeof(struct pmu_i2c_hdr) + 1;
1955 req.reply_expected = 0;
1956 req.reply_len = 0;
1957 req.reply[0] = 0xff;
1958 rc = pmu_queue_request(&req);
1959 if (rc)
1960 return rc;
1961 while(!req.complete)
1962 pmu_poll();
1963 if (req.reply[0] == PMU_I2C_STATUS_OK)
1964 break;
1965 mdelay(15);
1966 }
1967 if (req.reply[0] != PMU_I2C_STATUS_OK)
1968 return -1;
1969
1970 for (retry=0; retry<16; retry++) {
1971 memset(&req, 0, sizeof(req));
1972
1973 mdelay(15);
1974
1975 hdr->bus = PMU_I2C_BUS_STATUS;
1976 req.reply[0] = 0xff;
1977
1978 req.nbytes = 2;
1979 req.reply_expected = 0;
1980 req.reply_len = 0;
1981 req.data[0] = PMU_I2C_CMD;
1982 rc = pmu_queue_request(&req);
1983 if (rc)
1984 return rc;
1985 while(!req.complete)
1986 pmu_poll();
1987 if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) {
1988 memcpy(data, &req.reply[1], req.reply_len - 1);
1989 return req.reply_len - 1;
1990 }
1991 }
1992 return -1;
1993 }
1994
1995 int
1996 pmu_i2c_simple_write(int bus, int addr, u8* data, int len)
1997 {
1998 struct adb_request req;
1999 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1];
2000 int retry;
2001 int rc;
2002
2003 for (retry=0; retry<16; retry++) {
2004 memset(&req, 0, sizeof(req));
2005
2006 hdr->bus = bus;
2007 hdr->address = addr & 0xfe;
2008 hdr->mode = PMU_I2C_MODE_SIMPLE;
2009 hdr->bus2 = 0;
2010 hdr->sub_addr = 0;
2011 hdr->comb_addr = 0;
2012 hdr->count = len;
2013
2014 req.data[0] = PMU_I2C_CMD;
2015 memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len);
2016 req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1;
2017 req.reply_expected = 0;
2018 req.reply_len = 0;
2019 req.reply[0] = 0xff;
2020 rc = pmu_queue_request(&req);
2021 if (rc)
2022 return rc;
2023 while(!req.complete)
2024 pmu_poll();
2025 if (req.reply[0] == PMU_I2C_STATUS_OK)
2026 break;
2027 mdelay(15);
2028 }
2029 if (req.reply[0] != PMU_I2C_STATUS_OK)
2030 return -1;
2031
2032 for (retry=0; retry<16; retry++) {
2033 memset(&req, 0, sizeof(req));
2034
2035 mdelay(15);
2036
2037 hdr->bus = PMU_I2C_BUS_STATUS;
2038 req.reply[0] = 0xff;
2039
2040 req.nbytes = 2;
2041 req.reply_expected = 0;
2042 req.reply_len = 0;
2043 req.data[0] = PMU_I2C_CMD;
2044 rc = pmu_queue_request(&req);
2045 if (rc)
2046 return rc;
2047 while(!req.complete)
2048 pmu_poll();
2049 if (req.reply[0] == PMU_I2C_STATUS_OK)
2050 return len;
2051 }
2052 return -1;
2053 }
2054
2055 #ifdef CONFIG_PMAC_PBOOK
2056
2057 static LIST_HEAD(sleep_notifiers);
2058
2059 int
2060 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
2061 {
2062 struct list_head *list;
2063 struct pmu_sleep_notifier *notifier;
2064
2065 for (list = sleep_notifiers.next; list != &sleep_notifiers;
2066 list = list->next) {
2067 notifier = list_entry(list, struct pmu_sleep_notifier, list);
2068 if (n->priority > notifier->priority)
2069 break;
2070 }
2071 __list_add(&n->list, list->prev, list);
2072 return 0;
2073 }
2074
2075 int
2076 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
2077 {
2078 if (n->list.next == 0)
2079 return -ENOENT;
2080 list_del(&n->list);
2081 n->list.next = NULL;
2082 return 0;
2083 }
2084
2085 /* Sleep is broadcast last-to-first */
2086 static int __pmac
2087 broadcast_sleep(int when, int fallback)
2088 {
2089 int ret = PBOOK_SLEEP_OK;
2090 struct list_head *list;
2091 struct pmu_sleep_notifier *notifier;
2092
2093 for (list = sleep_notifiers.prev; list != &sleep_notifiers;
2094 list = list->prev) {
2095 notifier = list_entry(list, struct pmu_sleep_notifier, list);
2096 ret = notifier->notifier_call(notifier, when);
2097 if (ret != PBOOK_SLEEP_OK) {
2098 printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
2099 when, notifier, notifier->notifier_call);
2100 for (; list != &sleep_notifiers; list = list->next) {
2101 notifier = list_entry(list, struct pmu_sleep_notifier, list);
2102 notifier->notifier_call(notifier, fallback);
2103 }
2104 return ret;
2105 }
2106 }
2107 return ret;
2108 }
2109
2110 /* Wake is broadcast first-to-last */
2111 static int __pmac
2112 broadcast_wake(void)
2113 {
2114 int ret = PBOOK_SLEEP_OK;
2115 struct list_head *list;
2116 struct pmu_sleep_notifier *notifier;
2117
2118 for (list = sleep_notifiers.next; list != &sleep_notifiers;
2119 list = list->next) {
2120 notifier = list_entry(list, struct pmu_sleep_notifier, list);
2121 notifier->notifier_call(notifier, PBOOK_WAKE);
2122 }
2123 return ret;
2124 }
2125
2126 /*
2127 * This struct is used to store config register values for
2128 * PCI devices which may get powered off when we sleep.
2129 */
2130 static struct pci_save {
2131 #ifndef HACKED_PCI_SAVE
2132 u16 command;
2133 u16 cache_lat;
2134 u16 intr;
2135 u32 rom_address;
2136 #else
2137 u32 config[16];
2138 #endif
2139 } *pbook_pci_saves;
2140 static int pbook_npci_saves;
2141
2142 static void __pmac
2143 pbook_alloc_pci_save(void)
2144 {
2145 int npci;
2146 struct pci_dev *pd = NULL;
2147
2148 npci = 0;
2149 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
2150 ++npci;
2151 }
2152 if (npci == 0)
2153 return;
2154 pbook_pci_saves = (struct pci_save *)
2155 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
2156 pbook_npci_saves = npci;
2157 }
2158
2159 static void __pmac
2160 pbook_free_pci_save(void)
2161 {
2162 if (pbook_pci_saves == NULL)
2163 return;
2164 kfree(pbook_pci_saves);
2165 pbook_pci_saves = NULL;
2166 pbook_npci_saves = 0;
2167 }
2168
2169 static void __pmac
2170 pbook_pci_save(void)
2171 {
2172 struct pci_save *ps = pbook_pci_saves;
2173 struct pci_dev *pd = NULL;
2174 int npci = pbook_npci_saves;
2175
2176 if (ps == NULL)
2177 return;
2178
2179 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
2180 if (npci-- == 0)
2181 return;
2182 #ifndef HACKED_PCI_SAVE
2183 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
2184 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
2185 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
2186 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
2187 #else
2188 int i;
2189 for (i=1;i<16;i++)
2190 pci_read_config_dword(pd, i<<4, &ps->config[i]);
2191 #endif
2192 ++ps;
2193 }
2194 }
2195
2196 /* For this to work, we must take care of a few things: If gmac was enabled
2197 * during boot, it will be in the pci dev list. If it's disabled at this point
2198 * (and it will probably be), then you can't access it's config space.
2199 */
2200 static void __pmac
2201 pbook_pci_restore(void)
2202 {
2203 u16 cmd;
2204 struct pci_save *ps = pbook_pci_saves - 1;
2205 struct pci_dev *pd = NULL;
2206 int npci = pbook_npci_saves;
2207 int j;
2208
2209 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
2210 #ifdef HACKED_PCI_SAVE
2211 int i;
2212 if (npci-- == 0)
2213 return;
2214 ps++;
2215 for (i=2;i<16;i++)
2216 pci_write_config_dword(pd, i<<4, ps->config[i]);
2217 pci_write_config_dword(pd, 4, ps->config[1]);
2218 #else
2219 if (npci-- == 0)
2220 return;
2221 ps++;
2222 if (ps->command == 0)
2223 continue;
2224 pci_read_config_word(pd, PCI_COMMAND, &cmd);
2225 if ((ps->command & ~cmd) == 0)
2226 continue;
2227 switch (pd->hdr_type) {
2228 case PCI_HEADER_TYPE_NORMAL:
2229 for (j = 0; j < 6; ++j)
2230 pci_write_config_dword(pd,
2231 PCI_BASE_ADDRESS_0 + j*4,
2232 pd->resource[j].start);
2233 pci_write_config_dword(pd, PCI_ROM_ADDRESS,
2234 ps->rom_address);
2235 pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
2236 ps->cache_lat);
2237 pci_write_config_word(pd, PCI_INTERRUPT_LINE,
2238 ps->intr);
2239 pci_write_config_word(pd, PCI_COMMAND, ps->command);
2240 break;
2241 }
2242 #endif
2243 }
2244 }
2245
2246 #ifdef DEBUG_SLEEP
2247 /* N.B. This doesn't work on the 3400 */
2248 void __pmac
2249 pmu_blink(int n)
2250 {
2251 struct adb_request req;
2252
2253 memset(&req, 0, sizeof(req));
2254
2255 for (; n > 0; --n) {
2256 req.nbytes = 4;
2257 req.done = NULL;
2258 req.data[0] = 0xee;
2259 req.data[1] = 4;
2260 req.data[2] = 0;
2261 req.data[3] = 1;
2262 req.reply[0] = ADB_RET_OK;
2263 req.reply_len = 1;
2264 req.reply_expected = 0;
2265 pmu_polled_request(&req);
2266 mdelay(50);
2267 req.nbytes = 4;
2268 req.done = NULL;
2269 req.data[0] = 0xee;
2270 req.data[1] = 4;
2271 req.data[2] = 0;
2272 req.data[3] = 0;
2273 req.reply[0] = ADB_RET_OK;
2274 req.reply_len = 1;
2275 req.reply_expected = 0;
2276 pmu_polled_request(&req);
2277 mdelay(50);
2278 }
2279 mdelay(50);
2280 }
2281 #endif
2282
2283 /*
2284 * Put the powerbook to sleep.
2285 */
2286
2287 static u32 save_via[8] __pmacdata;
2288
2289 static void __pmac
2290 save_via_state(void)
2291 {
2292 save_via[0] = in_8(&via[ANH]);
2293 save_via[1] = in_8(&via[DIRA]);
2294 save_via[2] = in_8(&via[B]);
2295 save_via[3] = in_8(&via[DIRB]);
2296 save_via[4] = in_8(&via[PCR]);
2297 save_via[5] = in_8(&via[ACR]);
2298 save_via[6] = in_8(&via[T1CL]);
2299 save_via[7] = in_8(&via[T1CH]);
2300 }
2301 static void __pmac
2302 restore_via_state(void)
2303 {
2304 out_8(&via[ANH], save_via[0]);
2305 out_8(&via[DIRA], save_via[1]);
2306 out_8(&via[B], save_via[2]);
2307 out_8(&via[DIRB], save_via[3]);
2308 out_8(&via[PCR], save_via[4]);
2309 out_8(&via[ACR], save_via[5]);
2310 out_8(&via[T1CL], save_via[6]);
2311 out_8(&via[T1CH], save_via[7]);
2312 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
2313 out_8(&via[IFR], 0x7f); /* clear IFR */
2314 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
2315 }
2316
2317 static int __pmac
2318 pmac_suspend_devices(void)
2319 {
2320 int ret;
2321
2322 pm_prepare_console();
2323
2324 /* Notify old-style device drivers & userland */
2325 ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
2326 if (ret != PBOOK_SLEEP_OK) {
2327 printk(KERN_ERR "Sleep rejected by drivers\n");
2328 return -EBUSY;
2329 }
2330
2331 /* Sync the disks. */
2332 /* XXX It would be nice to have some way to ensure that
2333 * nobody is dirtying any new buffers while we wait. That
2334 * could be achieved using the refrigerator for processes
2335 * that swsusp uses
2336 */
2337 sys_sync();
2338
2339 /* Sleep can fail now. May not be very robust but useful for debugging */
2340 ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
2341 if (ret != PBOOK_SLEEP_OK) {
2342 printk(KERN_ERR "Driver sleep failed\n");
2343 return -EBUSY;
2344 }
2345
2346 /* Send suspend call to devices, hold the device core's dpm_sem */
2347 ret = device_suspend(PMSG_SUSPEND);
2348 if (ret) {
2349 broadcast_wake();
2350 printk(KERN_ERR "Driver sleep failed\n");
2351 return -EBUSY;
2352 }
2353
2354 /* Disable clock spreading on some machines */
2355 pmac_tweak_clock_spreading(0);
2356
2357 /* Stop preemption */
2358 preempt_disable();
2359
2360 /* Make sure the decrementer won't interrupt us */
2361 asm volatile("mtdec %0" : : "r" (0x7fffffff));
2362 /* Make sure any pending DEC interrupt occurring while we did
2363 * the above didn't re-enable the DEC */
2364 mb();
2365 asm volatile("mtdec %0" : : "r" (0x7fffffff));
2366
2367 /* We can now disable MSR_EE. This code of course works properly only
2368 * on UP machines... For SMP, if we ever implement sleep, we'll have to
2369 * stop the "other" CPUs way before we do all that stuff.
2370 */
2371 local_irq_disable();
2372
2373 /* Broadcast power down irq
2374 * This isn't that useful in most cases (only directly wired devices can
2375 * use this but still... This will take care of sysdev's as well, so
2376 * we exit from here with local irqs disabled and PIC off.
2377 */
2378 ret = device_power_down(PMSG_SUSPEND);
2379 if (ret) {
2380 wakeup_decrementer();
2381 local_irq_enable();
2382 preempt_enable();
2383 device_resume();
2384 broadcast_wake();
2385 printk(KERN_ERR "Driver powerdown failed\n");
2386 return -EBUSY;
2387 }
2388
2389 /* Wait for completion of async backlight requests */
2390 while (!bright_req_1.complete || !bright_req_2.complete ||
2391 !batt_req.complete)
2392 pmu_poll();
2393
2394 /* Giveup the lazy FPU & vec so we don't have to back them
2395 * up from the low level code
2396 */
2397 enable_kernel_fp();
2398
2399 #ifdef CONFIG_ALTIVEC
2400 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2401 enable_kernel_altivec();
2402 #endif /* CONFIG_ALTIVEC */
2403
2404 return 0;
2405 }
2406
2407 static int __pmac
2408 pmac_wakeup_devices(void)
2409 {
2410 mdelay(100);
2411
2412 /* Power back up system devices (including the PIC) */
2413 device_power_up();
2414
2415 /* Force a poll of ADB interrupts */
2416 adb_int_pending = 1;
2417 via_pmu_interrupt(0, NULL, NULL);
2418
2419 /* Restart jiffies & scheduling */
2420 wakeup_decrementer();
2421
2422 /* Re-enable local CPU interrupts */
2423 local_irq_enable();
2424 mdelay(10);
2425 preempt_enable();
2426
2427 /* Re-enable clock spreading on some machines */
2428 pmac_tweak_clock_spreading(1);
2429
2430 /* Resume devices */
2431 device_resume();
2432
2433 /* Notify old style drivers */
2434 broadcast_wake();
2435
2436 pm_restore_console();
2437
2438 return 0;
2439 }
2440
2441 #define GRACKLE_PM (1<<7)
2442 #define GRACKLE_DOZE (1<<5)
2443 #define GRACKLE_NAP (1<<4)
2444 #define GRACKLE_SLEEP (1<<3)
2445
2446 int __pmac
2447 powerbook_sleep_grackle(void)
2448 {
2449 unsigned long save_l2cr;
2450 unsigned short pmcr1;
2451 struct adb_request req;
2452 int ret;
2453 struct pci_dev *grackle;
2454
2455 grackle = pci_find_slot(0, 0);
2456 if (!grackle)
2457 return -ENODEV;
2458
2459 ret = pmac_suspend_devices();
2460 if (ret) {
2461 printk(KERN_ERR "Sleep rejected by devices\n");
2462 return ret;
2463 }
2464
2465 /* Turn off various things. Darwin does some retry tests here... */
2466 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2467 pmu_wait_complete(&req);
2468 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2469 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2470 pmu_wait_complete(&req);
2471
2472 /* For 750, save backside cache setting and disable it */
2473 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
2474
2475 if (!__fake_sleep) {
2476 /* Ask the PMU to put us to sleep */
2477 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2478 pmu_wait_complete(&req);
2479 }
2480
2481 /* The VIA is supposed not to be restored correctly*/
2482 save_via_state();
2483 /* We shut down some HW */
2484 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2485
2486 pci_read_config_word(grackle, 0x70, &pmcr1);
2487 /* Apparently, MacOS uses NAP mode for Grackle ??? */
2488 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2489 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2490 pci_write_config_word(grackle, 0x70, pmcr1);
2491
2492 /* Call low-level ASM sleep handler */
2493 if (__fake_sleep)
2494 mdelay(5000);
2495 else
2496 low_sleep_handler();
2497
2498 /* We're awake again, stop grackle PM */
2499 pci_read_config_word(grackle, 0x70, &pmcr1);
2500 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2501 pci_write_config_word(grackle, 0x70, pmcr1);
2502
2503 /* Make sure the PMU is idle */
2504 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2505 restore_via_state();
2506
2507 /* Restore L2 cache */
2508 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2509 _set_L2CR(save_l2cr);
2510
2511 /* Restore userland MMU context */
2512 set_context(current->active_mm->context, current->active_mm->pgd);
2513
2514 /* Power things up */
2515 pmu_unlock();
2516 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2517 pmu_wait_complete(&req);
2518 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2519 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2520 pmu_wait_complete(&req);
2521 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2522 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2523 pmu_wait_complete(&req);
2524
2525 pmac_wakeup_devices();
2526
2527 return 0;
2528 }
2529
2530 static int __pmac
2531 powerbook_sleep_Core99(void)
2532 {
2533 unsigned long save_l2cr;
2534 unsigned long save_l3cr;
2535 struct adb_request req;
2536 int ret;
2537
2538 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2539 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2540 return -ENOSYS;
2541 }
2542
2543 if (num_online_cpus() > 1 || cpu_is_offline(0))
2544 return -EAGAIN;
2545
2546 ret = pmac_suspend_devices();
2547 if (ret) {
2548 printk(KERN_ERR "Sleep rejected by devices\n");
2549 return ret;
2550 }
2551
2552 /* Stop environment and ADB interrupts */
2553 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2554 pmu_wait_complete(&req);
2555
2556 /* Tell PMU what events will wake us up */
2557 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2558 0xff, 0xff);
2559 pmu_wait_complete(&req);
2560 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2561 0, PMU_PWR_WAKEUP_KEY |
2562 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2563 pmu_wait_complete(&req);
2564
2565 /* Save the state of the L2 and L3 caches */
2566 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
2567 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
2568
2569 if (!__fake_sleep) {
2570 /* Ask the PMU to put us to sleep */
2571 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2572 pmu_wait_complete(&req);
2573 }
2574
2575 /* The VIA is supposed not to be restored correctly*/
2576 save_via_state();
2577
2578 /* Shut down various ASICs. There's a chance that we can no longer
2579 * talk to the PMU after this, so I moved it to _after_ sending the
2580 * sleep command to it. Still need to be checked.
2581 */
2582 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2583
2584 /* Call low-level ASM sleep handler */
2585 if (__fake_sleep)
2586 mdelay(5000);
2587 else
2588 low_sleep_handler();
2589
2590 /* Restore Apple core ASICs state */
2591 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2592
2593 /* Restore VIA */
2594 restore_via_state();
2595
2596 /* tweak LPJ before cpufreq is there */
2597 loops_per_jiffy *= 2;
2598
2599 /* Restore video */
2600 pmac_call_early_video_resume();
2601
2602 /* Restore L2 cache */
2603 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2604 _set_L2CR(save_l2cr);
2605 /* Restore L3 cache */
2606 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2607 _set_L3CR(save_l3cr);
2608
2609 /* Restore userland MMU context */
2610 set_context(current->active_mm->context, current->active_mm->pgd);
2611
2612 /* Tell PMU we are ready */
2613 pmu_unlock();
2614 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2615 pmu_wait_complete(&req);
2616 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2617 pmu_wait_complete(&req);
2618
2619 /* Restore LPJ, cpufreq will adjust the cpu frequency */
2620 loops_per_jiffy /= 2;
2621
2622 pmac_wakeup_devices();
2623
2624 return 0;
2625 }
2626
2627 #define PB3400_MEM_CTRL 0xf8000000
2628 #define PB3400_MEM_CTRL_SLEEP 0x70
2629
2630 static int __pmac
2631 powerbook_sleep_3400(void)
2632 {
2633 int ret, i, x;
2634 unsigned int hid0;
2635 unsigned long p;
2636 struct adb_request sleep_req;
2637 void __iomem *mem_ctrl;
2638 unsigned int __iomem *mem_ctrl_sleep;
2639
2640 /* first map in the memory controller registers */
2641 mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2642 if (mem_ctrl == NULL) {
2643 printk("powerbook_sleep_3400: ioremap failed\n");
2644 return -ENOMEM;
2645 }
2646 mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2647
2648 /* Allocate room for PCI save */
2649 pbook_alloc_pci_save();
2650
2651 ret = pmac_suspend_devices();
2652 if (ret) {
2653 pbook_free_pci_save();
2654 printk(KERN_ERR "Sleep rejected by devices\n");
2655 return ret;
2656 }
2657
2658 /* Save the state of PCI config space for some slots */
2659 pbook_pci_save();
2660
2661 /* Set the memory controller to keep the memory refreshed
2662 while we're asleep */
2663 for (i = 0x403f; i >= 0x4000; --i) {
2664 out_be32(mem_ctrl_sleep, i);
2665 do {
2666 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2667 } while (x == 0);
2668 if (x >= 0x100)
2669 break;
2670 }
2671
2672 /* Ask the PMU to put us to sleep */
2673 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2674 while (!sleep_req.complete)
2675 mb();
2676
2677 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2678
2679 /* displacement-flush the L2 cache - necessary? */
2680 for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2681 i = *(volatile int *)p;
2682 asleep = 1;
2683
2684 /* Put the CPU into sleep mode */
2685 asm volatile("mfspr %0,1008" : "=r" (hid0) :);
2686 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2687 asm volatile("mtspr 1008,%0" : : "r" (hid0));
2688 _nmask_and_or_msr(0, MSR_POW | MSR_EE);
2689 udelay(10);
2690
2691 /* OK, we're awake again, start restoring things */
2692 out_be32(mem_ctrl_sleep, 0x3f);
2693 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2694 pbook_pci_restore();
2695 pmu_unlock();
2696
2697 /* wait for the PMU interrupt sequence to complete */
2698 while (asleep)
2699 mb();
2700
2701 pmac_wakeup_devices();
2702 pbook_free_pci_save();
2703 iounmap(mem_ctrl);
2704
2705 return 0;
2706 }
2707
2708 /*
2709 * Support for /dev/pmu device
2710 */
2711 #define RB_SIZE 0x10
2712 struct pmu_private {
2713 struct list_head list;
2714 int rb_get;
2715 int rb_put;
2716 struct rb_entry {
2717 unsigned short len;
2718 unsigned char data[16];
2719 } rb_buf[RB_SIZE];
2720 wait_queue_head_t wait;
2721 spinlock_t lock;
2722 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2723 int backlight_locker;
2724 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2725 };
2726
2727 static LIST_HEAD(all_pmu_pvt);
2728 static DEFINE_SPINLOCK(all_pvt_lock __pmacdata);
2729
2730 static void __pmac
2731 pmu_pass_intr(unsigned char *data, int len)
2732 {
2733 struct pmu_private *pp;
2734 struct list_head *list;
2735 int i;
2736 unsigned long flags;
2737
2738 if (len > sizeof(pp->rb_buf[0].data))
2739 len = sizeof(pp->rb_buf[0].data);
2740 spin_lock_irqsave(&all_pvt_lock, flags);
2741 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2742 pp = list_entry(list, struct pmu_private, list);
2743 spin_lock(&pp->lock);
2744 i = pp->rb_put + 1;
2745 if (i >= RB_SIZE)
2746 i = 0;
2747 if (i != pp->rb_get) {
2748 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2749 rp->len = len;
2750 memcpy(rp->data, data, len);
2751 pp->rb_put = i;
2752 wake_up_interruptible(&pp->wait);
2753 }
2754 spin_unlock(&pp->lock);
2755 }
2756 spin_unlock_irqrestore(&all_pvt_lock, flags);
2757 }
2758
2759 static int __pmac
2760 pmu_open(struct inode *inode, struct file *file)
2761 {
2762 struct pmu_private *pp;
2763 unsigned long flags;
2764
2765 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2766 if (pp == 0)
2767 return -ENOMEM;
2768 pp->rb_get = pp->rb_put = 0;
2769 spin_lock_init(&pp->lock);
2770 init_waitqueue_head(&pp->wait);
2771 spin_lock_irqsave(&all_pvt_lock, flags);
2772 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2773 pp->backlight_locker = 0;
2774 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2775 list_add(&pp->list, &all_pmu_pvt);
2776 spin_unlock_irqrestore(&all_pvt_lock, flags);
2777 file->private_data = pp;
2778 return 0;
2779 }
2780
2781 static ssize_t __pmac
2782 pmu_read(struct file *file, char __user *buf,
2783 size_t count, loff_t *ppos)
2784 {
2785 struct pmu_private *pp = file->private_data;
2786 DECLARE_WAITQUEUE(wait, current);
2787 unsigned long flags;
2788 int ret = 0;
2789
2790 if (count < 1 || pp == 0)
2791 return -EINVAL;
2792 if (!access_ok(VERIFY_WRITE, buf, count))
2793 return -EFAULT;
2794
2795 spin_lock_irqsave(&pp->lock, flags);
2796 add_wait_queue(&pp->wait, &wait);
2797 current->state = TASK_INTERRUPTIBLE;
2798
2799 for (;;) {
2800 ret = -EAGAIN;
2801 if (pp->rb_get != pp->rb_put) {
2802 int i = pp->rb_get;
2803 struct rb_entry *rp = &pp->rb_buf[i];
2804 ret = rp->len;
2805 spin_unlock_irqrestore(&pp->lock, flags);
2806 if (ret > count)
2807 ret = count;
2808 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2809 ret = -EFAULT;
2810 if (++i >= RB_SIZE)
2811 i = 0;
2812 spin_lock_irqsave(&pp->lock, flags);
2813 pp->rb_get = i;
2814 }
2815 if (ret >= 0)
2816 break;
2817 if (file->f_flags & O_NONBLOCK)
2818 break;
2819 ret = -ERESTARTSYS;
2820 if (signal_pending(current))
2821 break;
2822 spin_unlock_irqrestore(&pp->lock, flags);
2823 schedule();
2824 spin_lock_irqsave(&pp->lock, flags);
2825 }
2826 current->state = TASK_RUNNING;
2827 remove_wait_queue(&pp->wait, &wait);
2828 spin_unlock_irqrestore(&pp->lock, flags);
2829
2830 return ret;
2831 }
2832
2833 static ssize_t __pmac
2834 pmu_write(struct file *file, const char __user *buf,
2835 size_t count, loff_t *ppos)
2836 {
2837 return 0;
2838 }
2839
2840 static unsigned int __pmac
2841 pmu_fpoll(struct file *filp, poll_table *wait)
2842 {
2843 struct pmu_private *pp = filp->private_data;
2844 unsigned int mask = 0;
2845 unsigned long flags;
2846
2847 if (pp == 0)
2848 return 0;
2849 poll_wait(filp, &pp->wait, wait);
2850 spin_lock_irqsave(&pp->lock, flags);
2851 if (pp->rb_get != pp->rb_put)
2852 mask |= POLLIN;
2853 spin_unlock_irqrestore(&pp->lock, flags);
2854 return mask;
2855 }
2856
2857 static int __pmac
2858 pmu_release(struct inode *inode, struct file *file)
2859 {
2860 struct pmu_private *pp = file->private_data;
2861 unsigned long flags;
2862
2863 lock_kernel();
2864 if (pp != 0) {
2865 file->private_data = NULL;
2866 spin_lock_irqsave(&all_pvt_lock, flags);
2867 list_del(&pp->list);
2868 spin_unlock_irqrestore(&all_pvt_lock, flags);
2869 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2870 if (pp->backlight_locker) {
2871 spin_lock_irqsave(&pmu_lock, flags);
2872 disable_kernel_backlight--;
2873 spin_unlock_irqrestore(&pmu_lock, flags);
2874 }
2875 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2876 kfree(pp);
2877 }
2878 unlock_kernel();
2879 return 0;
2880 }
2881
2882 /* Note: removed __openfirmware here since it causes link errors */
2883 static int __pmac
2884 pmu_ioctl(struct inode * inode, struct file *filp,
2885 u_int cmd, u_long arg)
2886 {
2887 struct pmu_private *pp = filp->private_data;
2888 __u32 __user *argp = (__u32 __user *)arg;
2889 int error;
2890
2891 switch (cmd) {
2892 case PMU_IOC_SLEEP:
2893 if (!capable(CAP_SYS_ADMIN))
2894 return -EACCES;
2895 if (sleep_in_progress)
2896 return -EBUSY;
2897 sleep_in_progress = 1;
2898 switch (pmu_kind) {
2899 case PMU_OHARE_BASED:
2900 error = powerbook_sleep_3400();
2901 break;
2902 case PMU_HEATHROW_BASED:
2903 case PMU_PADDINGTON_BASED:
2904 error = powerbook_sleep_grackle();
2905 break;
2906 case PMU_KEYLARGO_BASED:
2907 error = powerbook_sleep_Core99();
2908 break;
2909 default:
2910 error = -ENOSYS;
2911 }
2912 sleep_in_progress = 0;
2913 return error;
2914 case PMU_IOC_CAN_SLEEP:
2915 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2916 return put_user(0, argp);
2917 else
2918 return put_user(1, argp);
2919
2920 #ifdef CONFIG_PMAC_BACKLIGHT
2921 /* Backlight should have its own device or go via
2922 * the fbdev
2923 */
2924 case PMU_IOC_GET_BACKLIGHT:
2925 if (sleep_in_progress)
2926 return -EBUSY;
2927 error = get_backlight_level();
2928 if (error < 0)
2929 return error;
2930 return put_user(error, argp);
2931 case PMU_IOC_SET_BACKLIGHT:
2932 {
2933 __u32 value;
2934 if (sleep_in_progress)
2935 return -EBUSY;
2936 error = get_user(value, argp);
2937 if (!error)
2938 error = set_backlight_level(value);
2939 return error;
2940 }
2941 #ifdef CONFIG_INPUT_ADBHID
2942 case PMU_IOC_GRAB_BACKLIGHT: {
2943 unsigned long flags;
2944 if (pp->backlight_locker)
2945 return 0;
2946 pp->backlight_locker = 1;
2947 spin_lock_irqsave(&pmu_lock, flags);
2948 disable_kernel_backlight++;
2949 spin_unlock_irqrestore(&pmu_lock, flags);
2950 return 0;
2951 }
2952 #endif /* CONFIG_INPUT_ADBHID */
2953 #endif /* CONFIG_PMAC_BACKLIGHT */
2954 case PMU_IOC_GET_MODEL:
2955 return put_user(pmu_kind, argp);
2956 case PMU_IOC_HAS_ADB:
2957 return put_user(pmu_has_adb, argp);
2958 }
2959 return -EINVAL;
2960 }
2961
2962 static struct file_operations pmu_device_fops __pmacdata = {
2963 .read = pmu_read,
2964 .write = pmu_write,
2965 .poll = pmu_fpoll,
2966 .ioctl = pmu_ioctl,
2967 .open = pmu_open,
2968 .release = pmu_release,
2969 };
2970
2971 static struct miscdevice pmu_device __pmacdata = {
2972 PMU_MINOR, "pmu", &pmu_device_fops
2973 };
2974
2975 void pmu_device_init(void)
2976 {
2977 if (!via)
2978 return;
2979 if (misc_register(&pmu_device) < 0)
2980 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2981 }
2982 #endif /* CONFIG_PMAC_PBOOK */
2983
2984 #ifdef DEBUG_SLEEP
2985 static inline void __pmac
2986 polled_handshake(volatile unsigned char __iomem *via)
2987 {
2988 via[B] &= ~TREQ; eieio();
2989 while ((via[B] & TACK) != 0)
2990 ;
2991 via[B] |= TREQ; eieio();
2992 while ((via[B] & TACK) == 0)
2993 ;
2994 }
2995
2996 static inline void __pmac
2997 polled_send_byte(volatile unsigned char __iomem *via, int x)
2998 {
2999 via[ACR] |= SR_OUT | SR_EXT; eieio();
3000 via[SR] = x; eieio();
3001 polled_handshake(via);
3002 }
3003
3004 static inline int __pmac
3005 polled_recv_byte(volatile unsigned char __iomem *via)
3006 {
3007 int x;
3008
3009 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
3010 x = via[SR]; eieio();
3011 polled_handshake(via);
3012 x = via[SR]; eieio();
3013 return x;
3014 }
3015
3016 int __pmac
3017 pmu_polled_request(struct adb_request *req)
3018 {
3019 unsigned long flags;
3020 int i, l, c;
3021 volatile unsigned char __iomem *v = via;
3022
3023 req->complete = 1;
3024 c = req->data[0];
3025 l = pmu_data_len[c][0];
3026 if (l >= 0 && req->nbytes != l + 1)
3027 return -EINVAL;
3028
3029 local_irq_save(flags);
3030 while (pmu_state != idle)
3031 pmu_poll();
3032
3033 while ((via[B] & TACK) == 0)
3034 ;
3035 polled_send_byte(v, c);
3036 if (l < 0) {
3037 l = req->nbytes - 1;
3038 polled_send_byte(v, l);
3039 }
3040 for (i = 1; i <= l; ++i)
3041 polled_send_byte(v, req->data[i]);
3042
3043 l = pmu_data_len[c][1];
3044 if (l < 0)
3045 l = polled_recv_byte(v);
3046 for (i = 0; i < l; ++i)
3047 req->reply[i + req->reply_len] = polled_recv_byte(v);
3048
3049 if (req->done)
3050 (*req->done)(req);
3051
3052 local_irq_restore(flags);
3053 return 0;
3054 }
3055 #endif /* DEBUG_SLEEP */
3056
3057
3058 /* FIXME: This is a temporary set of callbacks to enable us
3059 * to do suspend-to-disk.
3060 */
3061
3062 #ifdef CONFIG_PM
3063
3064 static int pmu_sys_suspended = 0;
3065
3066 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
3067 {
3068 if (state != PM_SUSPEND_DISK || pmu_sys_suspended)
3069 return 0;
3070
3071 /* Suspend PMU event interrupts */
3072 pmu_suspend();
3073
3074 pmu_sys_suspended = 1;
3075 return 0;
3076 }
3077
3078 static int pmu_sys_resume(struct sys_device *sysdev)
3079 {
3080 struct adb_request req;
3081
3082 if (!pmu_sys_suspended)
3083 return 0;
3084
3085 /* Tell PMU we are ready */
3086 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
3087 pmu_wait_complete(&req);
3088
3089 /* Resume PMU event interrupts */
3090 pmu_resume();
3091
3092 pmu_sys_suspended = 0;
3093
3094 return 0;
3095 }
3096
3097 #endif /* CONFIG_PM */
3098
3099 static struct sysdev_class pmu_sysclass = {
3100 set_kset_name("pmu"),
3101 };
3102
3103 static struct sys_device device_pmu = {
3104 .id = 0,
3105 .cls = &pmu_sysclass,
3106 };
3107
3108 static struct sysdev_driver driver_pmu = {
3109 #ifdef CONFIG_PM
3110 .suspend = &pmu_sys_suspend,
3111 .resume = &pmu_sys_resume,
3112 #endif /* CONFIG_PM */
3113 };
3114
3115 static int __init init_pmu_sysfs(void)
3116 {
3117 int rc;
3118
3119 rc = sysdev_class_register(&pmu_sysclass);
3120 if (rc) {
3121 printk(KERN_ERR "Failed registering PMU sys class\n");
3122 return -ENODEV;
3123 }
3124 rc = sysdev_register(&device_pmu);
3125 if (rc) {
3126 printk(KERN_ERR "Failed registering PMU sys device\n");
3127 return -ENODEV;
3128 }
3129 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
3130 if (rc) {
3131 printk(KERN_ERR "Failed registering PMU sys driver\n");
3132 return -ENODEV;
3133 }
3134 return 0;
3135 }
3136
3137 subsys_initcall(init_pmu_sysfs);
3138
3139 EXPORT_SYMBOL(pmu_request);
3140 EXPORT_SYMBOL(pmu_poll);
3141 EXPORT_SYMBOL(pmu_poll_adb);
3142 EXPORT_SYMBOL(pmu_wait_complete);
3143 EXPORT_SYMBOL(pmu_suspend);
3144 EXPORT_SYMBOL(pmu_resume);
3145 EXPORT_SYMBOL(pmu_unlock);
3146 EXPORT_SYMBOL(pmu_i2c_combined_read);
3147 EXPORT_SYMBOL(pmu_i2c_stdsub_write);
3148 EXPORT_SYMBOL(pmu_i2c_simple_read);
3149 EXPORT_SYMBOL(pmu_i2c_simple_write);
3150 #ifdef CONFIG_PMAC_PBOOK
3151 EXPORT_SYMBOL(pmu_register_sleep_notifier);
3152 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
3153 EXPORT_SYMBOL(pmu_enable_irled);
3154 EXPORT_SYMBOL(pmu_battery_count);
3155 EXPORT_SYMBOL(pmu_batteries);
3156 EXPORT_SYMBOL(pmu_power_flags);
3157 #endif /* CONFIG_PMAC_PBOOK */
3158
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