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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / macintosh / via-pmu.c
blob128c26a1acd68a454c43d1baca92bc92eed2ff82
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/smp_lock.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/sysdev.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 volatile unsigned char __iomem *via;
77
78 /* VIA registers - spaced 0x200 bytes apart */
79 #define RS 0x200 /* skip between registers */
80 #define B 0 /* B-side data */
81 #define A RS /* A-side data */
82 #define DIRB (2*RS) /* B-side direction (1=output) */
83 #define DIRA (3*RS) /* A-side direction (1=output) */
84 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
85 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
86 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
87 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
88 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
89 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
90 #define SR (10*RS) /* Shift register */
91 #define ACR (11*RS) /* Auxiliary control register */
92 #define PCR (12*RS) /* Peripheral control register */
93 #define IFR (13*RS) /* Interrupt flag register */
94 #define IER (14*RS) /* Interrupt enable register */
95 #define ANH (15*RS) /* A-side data, no handshake */
96
97 /* Bits in B data register: both active low */
98 #define TACK 0x08 /* Transfer acknowledge (input) */
99 #define TREQ 0x10 /* Transfer request (output) */
100
101 /* Bits in ACR */
102 #define SR_CTRL 0x1c /* Shift register control bits */
103 #define SR_EXT 0x0c /* Shift on external clock */
104 #define SR_OUT 0x10 /* Shift out if 1 */
105
106 /* Bits in IFR and IER */
107 #define IER_SET 0x80 /* set bits in IER */
108 #define IER_CLR 0 /* clear bits in IER */
109 #define SR_INT 0x04 /* Shift register full/empty */
110 #define CB2_INT 0x08
111 #define CB1_INT 0x10 /* transition on CB1 input */
112
113 static volatile enum pmu_state {
114 idle,
115 sending,
116 intack,
117 reading,
118 reading_intr,
119 locked,
120 } pmu_state;
121
122 static volatile enum int_data_state {
123 int_data_empty,
124 int_data_fill,
125 int_data_ready,
126 int_data_flush
127 } int_data_state[2] = { int_data_empty, int_data_empty };
128
129 static struct adb_request *current_req;
130 static struct adb_request *last_req;
131 static struct adb_request *req_awaiting_reply;
132 static unsigned char interrupt_data[2][32];
133 static int interrupt_data_len[2];
134 static int int_data_last;
135 static unsigned char *reply_ptr;
136 static int data_index;
137 static int data_len;
138 static volatile int adb_int_pending;
139 static volatile int disable_poll;
140 static struct device_node *vias;
141 static int pmu_kind = PMU_UNKNOWN;
142 static int pmu_fully_inited;
143 static int pmu_has_adb;
144 static struct device_node *gpio_node;
145 static unsigned char __iomem *gpio_reg;
146 static int gpio_irq = NO_IRQ;
147 static int gpio_irq_enabled = -1;
148 static volatile int pmu_suspended;
149 static spinlock_t pmu_lock;
150 static u8 pmu_intr_mask;
151 static int pmu_version;
152 static int drop_interrupts;
153 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
154 static int option_lid_wakeup = 1;
155 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
156 static unsigned long async_req_locks;
157 static unsigned int pmu_irq_stats[11];
158
159 static struct proc_dir_entry *proc_pmu_root;
160 static struct proc_dir_entry *proc_pmu_info;
161 static struct proc_dir_entry *proc_pmu_irqstats;
162 static struct proc_dir_entry *proc_pmu_options;
163 static int option_server_mode;
164
165 int pmu_battery_count;
166 int pmu_cur_battery;
167 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
168 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
169 static int query_batt_timer = BATTERY_POLLING_COUNT;
170 static struct adb_request batt_req;
171 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
172
173 int __fake_sleep;
174 int asleep;
175
176 #ifdef CONFIG_ADB
177 static int adb_dev_map;
178 static int pmu_adb_flags;
179
180 static int pmu_probe(void);
181 static int pmu_init(void);
182 static int pmu_send_request(struct adb_request *req, int sync);
183 static int pmu_adb_autopoll(int devs);
184 static int pmu_adb_reset_bus(void);
185 #endif /* CONFIG_ADB */
186
187 static int init_pmu(void);
188 static void pmu_start(void);
189 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
190 static irqreturn_t gpio1_interrupt(int irq, void *arg);
191 static const struct file_operations pmu_info_proc_fops;
192 static const struct file_operations pmu_irqstats_proc_fops;
193 static void pmu_pass_intr(unsigned char *data, int len);
194 static const struct file_operations pmu_battery_proc_fops;
195 static const struct file_operations pmu_options_proc_fops;
196
197 #ifdef CONFIG_ADB
198 struct adb_driver via_pmu_driver = {
199 "PMU",
200 pmu_probe,
201 pmu_init,
202 pmu_send_request,
203 pmu_adb_autopoll,
204 pmu_poll_adb,
205 pmu_adb_reset_bus
206 };
207 #endif /* CONFIG_ADB */
208
209 extern void low_sleep_handler(void);
210 extern void enable_kernel_altivec(void);
211 extern void enable_kernel_fp(void);
212
213 #ifdef DEBUG_SLEEP
214 int pmu_polled_request(struct adb_request *req);
215 void pmu_blink(int n);
216 #endif
217
218 /*
219 * This table indicates for each PMU opcode:
220 * - the number of data bytes to be sent with the command, or -1
221 * if a length byte should be sent,
222 * - the number of response bytes which the PMU will return, or
223 * -1 if it will send a length byte.
224 */
225 static const s8 pmu_data_len[256][2] = {
226 /* 0 1 2 3 4 5 6 7 */
227 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
228 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
229 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
230 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
231 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
232 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
233 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
234 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
235 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
236 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
237 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
238 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
239 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
240 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
241 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
242 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
243 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
244 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
245 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
246 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
247 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
248 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
249 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
250 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
251 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
252 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
253 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
254 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
255 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
256 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
257 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
258 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
259 };
260
261 static char *pbook_type[] = {
262 "Unknown PowerBook",
263 "PowerBook 2400/3400/3500(G3)",
264 "PowerBook G3 Series",
265 "1999 PowerBook G3",
266 "Core99"
267 };
268
269 int __init find_via_pmu(void)
270 {
271 u64 taddr;
272 const u32 *reg;
273
274 if (via != 0)
275 return 1;
276 vias = of_find_node_by_name(NULL, "via-pmu");
277 if (vias == NULL)
278 return 0;
279
280 reg = of_get_property(vias, "reg", NULL);
281 if (reg == NULL) {
282 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
283 goto fail;
284 }
285 taddr = of_translate_address(vias, reg);
286 if (taddr == OF_BAD_ADDR) {
287 printk(KERN_ERR "via-pmu: Can't translate address !\n");
288 goto fail;
289 }
290
291 spin_lock_init(&pmu_lock);
292
293 pmu_has_adb = 1;
294
295 pmu_intr_mask = PMU_INT_PCEJECT |
296 PMU_INT_SNDBRT |
297 PMU_INT_ADB |
298 PMU_INT_TICK;
299
300 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
301 || of_device_is_compatible(vias->parent, "ohare")))
302 pmu_kind = PMU_OHARE_BASED;
303 else if (of_device_is_compatible(vias->parent, "paddington"))
304 pmu_kind = PMU_PADDINGTON_BASED;
305 else if (of_device_is_compatible(vias->parent, "heathrow"))
306 pmu_kind = PMU_HEATHROW_BASED;
307 else if (of_device_is_compatible(vias->parent, "Keylargo")
308 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
309 struct device_node *gpiop;
310 struct device_node *adbp;
311 u64 gaddr = OF_BAD_ADDR;
312
313 pmu_kind = PMU_KEYLARGO_BASED;
314 adbp = of_find_node_by_type(NULL, "adb");
315 pmu_has_adb = (adbp != NULL);
316 of_node_put(adbp);
317 pmu_intr_mask = PMU_INT_PCEJECT |
318 PMU_INT_SNDBRT |
319 PMU_INT_ADB |
320 PMU_INT_TICK |
321 PMU_INT_ENVIRONMENT;
322
323 gpiop = of_find_node_by_name(NULL, "gpio");
324 if (gpiop) {
325 reg = of_get_property(gpiop, "reg", NULL);
326 if (reg)
327 gaddr = of_translate_address(gpiop, reg);
328 if (gaddr != OF_BAD_ADDR)
329 gpio_reg = ioremap(gaddr, 0x10);
330 }
331 if (gpio_reg == NULL) {
332 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
333 goto fail_gpio;
334 }
335 } else
336 pmu_kind = PMU_UNKNOWN;
337
338 via = ioremap(taddr, 0x2000);
339 if (via == NULL) {
340 printk(KERN_ERR "via-pmu: Can't map address !\n");
341 goto fail;
342 }
343
344 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
345 out_8(&via[IFR], 0x7f); /* clear IFR */
346
347 pmu_state = idle;
348
349 if (!init_pmu()) {
350 via = NULL;
351 return 0;
352 }
353
354 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
355 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
356
357 sys_ctrler = SYS_CTRLER_PMU;
358
359 return 1;
360 fail:
361 of_node_put(vias);
362 iounmap(gpio_reg);
363 gpio_reg = NULL;
364 fail_gpio:
365 vias = NULL;
366 return 0;
367 }
368
369 #ifdef CONFIG_ADB
370 static int pmu_probe(void)
371 {
372 return vias == NULL? -ENODEV: 0;
373 }
374
375 static int __init pmu_init(void)
376 {
377 if (vias == NULL)
378 return -ENODEV;
379 return 0;
380 }
381 #endif /* CONFIG_ADB */
382
383 /*
384 * We can't wait until pmu_init gets called, that happens too late.
385 * It happens after IDE and SCSI initialization, which can take a few
386 * seconds, and by that time the PMU could have given up on us and
387 * turned us off.
388 * Thus this is called with arch_initcall rather than device_initcall.
389 */
390 static int __init via_pmu_start(void)
391 {
392 unsigned int irq;
393
394 if (vias == NULL)
395 return -ENODEV;
396
397 batt_req.complete = 1;
398
399 irq = irq_of_parse_and_map(vias, 0);
400 if (irq == NO_IRQ) {
401 printk(KERN_ERR "via-pmu: can't map interrupt\n");
402 return -ENODEV;
403 }
404 /* We set IRQF_NO_SUSPEND because we don't want the interrupt
405 * to be disabled between the 2 passes of driver suspend, we
406 * control our own disabling for that one
407 */
408 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
409 "VIA-PMU", (void *)0)) {
410 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
411 return -ENODEV;
412 }
413
414 if (pmu_kind == PMU_KEYLARGO_BASED) {
415 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
416 if (gpio_node == NULL)
417 gpio_node = of_find_node_by_name(NULL,
418 "pmu-interrupt");
419 if (gpio_node)
420 gpio_irq = irq_of_parse_and_map(gpio_node, 0);
421
422 if (gpio_irq != NO_IRQ) {
423 if (request_irq(gpio_irq, gpio1_interrupt, IRQF_TIMER,
424 "GPIO1 ADB", (void *)0))
425 printk(KERN_ERR "pmu: can't get irq %d"
426 " (GPIO1)\n", gpio_irq);
427 else
428 gpio_irq_enabled = 1;
429 }
430 }
431
432 /* Enable interrupts */
433 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
434
435 pmu_fully_inited = 1;
436
437 /* Make sure PMU settle down before continuing. This is _very_ important
438 * since the IDE probe may shut interrupts down for quite a bit of time. If
439 * a PMU communication is pending while this happens, the PMU may timeout
440 * Not that on Core99 machines, the PMU keeps sending us environement
441 * messages, we should find a way to either fix IDE or make it call
442 * pmu_suspend() before masking interrupts. This can also happens while
443 * scolling with some fbdevs.
444 */
445 do {
446 pmu_poll();
447 } while (pmu_state != idle);
448
449 return 0;
450 }
451
452 arch_initcall(via_pmu_start);
453
454 /*
455 * This has to be done after pci_init, which is a subsys_initcall.
456 */
457 static int __init via_pmu_dev_init(void)
458 {
459 if (vias == NULL)
460 return -ENODEV;
461
462 #ifdef CONFIG_PMAC_BACKLIGHT
463 /* Initialize backlight */
464 pmu_backlight_init();
465 #endif
466
467 #ifdef CONFIG_PPC32
468 if (of_machine_is_compatible("AAPL,3400/2400") ||
469 of_machine_is_compatible("AAPL,3500")) {
470 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
471 NULL, PMAC_MB_INFO_MODEL, 0);
472 pmu_battery_count = 1;
473 if (mb == PMAC_TYPE_COMET)
474 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
475 else
476 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
477 } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
478 of_machine_is_compatible("PowerBook1,1")) {
479 pmu_battery_count = 2;
480 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
481 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
482 } else {
483 struct device_node* prim =
484 of_find_node_by_name(NULL, "power-mgt");
485 const u32 *prim_info = NULL;
486 if (prim)
487 prim_info = of_get_property(prim, "prim-info", NULL);
488 if (prim_info) {
489 /* Other stuffs here yet unknown */
490 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
491 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
492 if (pmu_battery_count > 1)
493 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
494 }
495 of_node_put(prim);
496 }
497 #endif /* CONFIG_PPC32 */
498
499 /* Create /proc/pmu */
500 proc_pmu_root = proc_mkdir("pmu", NULL);
501 if (proc_pmu_root) {
502 long i;
503
504 for (i=0; i<pmu_battery_count; i++) {
505 char title[16];
506 sprintf(title, "battery_%ld", i);
507 proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
508 &pmu_battery_proc_fops, (void *)i);
509 }
510
511 proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
512 proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
513 &pmu_irqstats_proc_fops);
514 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
515 &pmu_options_proc_fops);
516 }
517 return 0;
518 }
519
520 device_initcall(via_pmu_dev_init);
521
522 static int
523 init_pmu(void)
524 {
525 int timeout;
526 struct adb_request req;
527
528 out_8(&via[B], via[B] | TREQ); /* negate TREQ */
529 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */
530
531 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
532 timeout = 100000;
533 while (!req.complete) {
534 if (--timeout < 0) {
535 printk(KERN_ERR "init_pmu: no response from PMU\n");
536 return 0;
537 }
538 udelay(10);
539 pmu_poll();
540 }
541
542 /* ack all pending interrupts */
543 timeout = 100000;
544 interrupt_data[0][0] = 1;
545 while (interrupt_data[0][0] || pmu_state != idle) {
546 if (--timeout < 0) {
547 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
548 return 0;
549 }
550 if (pmu_state == idle)
551 adb_int_pending = 1;
552 via_pmu_interrupt(0, NULL);
553 udelay(10);
554 }
555
556 /* Tell PMU we are ready. */
557 if (pmu_kind == PMU_KEYLARGO_BASED) {
558 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
559 while (!req.complete)
560 pmu_poll();
561 }
562
563 /* Read PMU version */
564 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
565 pmu_wait_complete(&req);
566 if (req.reply_len > 0)
567 pmu_version = req.reply[0];
568
569 /* Read server mode setting */
570 if (pmu_kind == PMU_KEYLARGO_BASED) {
571 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
572 PMU_PWR_GET_POWERUP_EVENTS);
573 pmu_wait_complete(&req);
574 if (req.reply_len == 2) {
575 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
576 option_server_mode = 1;
577 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
578 option_server_mode ? "enabled" : "disabled");
579 }
580 }
581 return 1;
582 }
583
584 int
585 pmu_get_model(void)
586 {
587 return pmu_kind;
588 }
589
590 static void pmu_set_server_mode(int server_mode)
591 {
592 struct adb_request req;
593
594 if (pmu_kind != PMU_KEYLARGO_BASED)
595 return;
596
597 option_server_mode = server_mode;
598 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
599 pmu_wait_complete(&req);
600 if (req.reply_len < 2)
601 return;
602 if (server_mode)
603 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
604 PMU_PWR_SET_POWERUP_EVENTS,
605 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
606 else
607 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
608 PMU_PWR_CLR_POWERUP_EVENTS,
609 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
610 pmu_wait_complete(&req);
611 }
612
613 /* This new version of the code for 2400/3400/3500 powerbooks
614 * is inspired from the implementation in gkrellm-pmu
615 */
616 static void
617 done_battery_state_ohare(struct adb_request* req)
618 {
619 /* format:
620 * [0] : flags
621 * 0x01 : AC indicator
622 * 0x02 : charging
623 * 0x04 : battery exist
624 * 0x08 :
625 * 0x10 :
626 * 0x20 : full charged
627 * 0x40 : pcharge reset
628 * 0x80 : battery exist
629 *
630 * [1][2] : battery voltage
631 * [3] : CPU temperature
632 * [4] : battery temperature
633 * [5] : current
634 * [6][7] : pcharge
635 * --tkoba
636 */
637 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
638 long pcharge, charge, vb, vmax, lmax;
639 long vmax_charging, vmax_charged;
640 long amperage, voltage, time, max;
641 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
642 NULL, PMAC_MB_INFO_MODEL, 0);
643
644 if (req->reply[0] & 0x01)
645 pmu_power_flags |= PMU_PWR_AC_PRESENT;
646 else
647 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
648
649 if (mb == PMAC_TYPE_COMET) {
650 vmax_charged = 189;
651 vmax_charging = 213;
652 lmax = 6500;
653 } else {
654 vmax_charged = 330;
655 vmax_charging = 330;
656 lmax = 6500;
657 }
658 vmax = vmax_charged;
659
660 /* If battery installed */
661 if (req->reply[0] & 0x04) {
662 bat_flags |= PMU_BATT_PRESENT;
663 if (req->reply[0] & 0x02)
664 bat_flags |= PMU_BATT_CHARGING;
665 vb = (req->reply[1] << 8) | req->reply[2];
666 voltage = (vb * 265 + 72665) / 10;
667 amperage = req->reply[5];
668 if ((req->reply[0] & 0x01) == 0) {
669 if (amperage > 200)
670 vb += ((amperage - 200) * 15)/100;
671 } else if (req->reply[0] & 0x02) {
672 vb = (vb * 97) / 100;
673 vmax = vmax_charging;
674 }
675 charge = (100 * vb) / vmax;
676 if (req->reply[0] & 0x40) {
677 pcharge = (req->reply[6] << 8) + req->reply[7];
678 if (pcharge > lmax)
679 pcharge = lmax;
680 pcharge *= 100;
681 pcharge = 100 - pcharge / lmax;
682 if (pcharge < charge)
683 charge = pcharge;
684 }
685 if (amperage > 0)
686 time = (charge * 16440) / amperage;
687 else
688 time = 0;
689 max = 100;
690 amperage = -amperage;
691 } else
692 charge = max = amperage = voltage = time = 0;
693
694 pmu_batteries[pmu_cur_battery].flags = bat_flags;
695 pmu_batteries[pmu_cur_battery].charge = charge;
696 pmu_batteries[pmu_cur_battery].max_charge = max;
697 pmu_batteries[pmu_cur_battery].amperage = amperage;
698 pmu_batteries[pmu_cur_battery].voltage = voltage;
699 pmu_batteries[pmu_cur_battery].time_remaining = time;
700
701 clear_bit(0, &async_req_locks);
702 }
703
704 static void
705 done_battery_state_smart(struct adb_request* req)
706 {
707 /* format:
708 * [0] : format of this structure (known: 3,4,5)
709 * [1] : flags
710 *
711 * format 3 & 4:
712 *
713 * [2] : charge
714 * [3] : max charge
715 * [4] : current
716 * [5] : voltage
717 *
718 * format 5:
719 *
720 * [2][3] : charge
721 * [4][5] : max charge
722 * [6][7] : current
723 * [8][9] : voltage
724 */
725
726 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
727 int amperage;
728 unsigned int capa, max, voltage;
729
730 if (req->reply[1] & 0x01)
731 pmu_power_flags |= PMU_PWR_AC_PRESENT;
732 else
733 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
734
735
736 capa = max = amperage = voltage = 0;
737
738 if (req->reply[1] & 0x04) {
739 bat_flags |= PMU_BATT_PRESENT;
740 switch(req->reply[0]) {
741 case 3:
742 case 4: capa = req->reply[2];
743 max = req->reply[3];
744 amperage = *((signed char *)&req->reply[4]);
745 voltage = req->reply[5];
746 break;
747 case 5: capa = (req->reply[2] << 8) | req->reply[3];
748 max = (req->reply[4] << 8) | req->reply[5];
749 amperage = *((signed short *)&req->reply[6]);
750 voltage = (req->reply[8] << 8) | req->reply[9];
751 break;
752 default:
753 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
754 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
755 break;
756 }
757 }
758
759 if ((req->reply[1] & 0x01) && (amperage > 0))
760 bat_flags |= PMU_BATT_CHARGING;
761
762 pmu_batteries[pmu_cur_battery].flags = bat_flags;
763 pmu_batteries[pmu_cur_battery].charge = capa;
764 pmu_batteries[pmu_cur_battery].max_charge = max;
765 pmu_batteries[pmu_cur_battery].amperage = amperage;
766 pmu_batteries[pmu_cur_battery].voltage = voltage;
767 if (amperage) {
768 if ((req->reply[1] & 0x01) && (amperage > 0))
769 pmu_batteries[pmu_cur_battery].time_remaining
770 = ((max-capa) * 3600) / amperage;
771 else
772 pmu_batteries[pmu_cur_battery].time_remaining
773 = (capa * 3600) / (-amperage);
774 } else
775 pmu_batteries[pmu_cur_battery].time_remaining = 0;
776
777 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
778
779 clear_bit(0, &async_req_locks);
780 }
781
782 static void
783 query_battery_state(void)
784 {
785 if (test_and_set_bit(0, &async_req_locks))
786 return;
787 if (pmu_kind == PMU_OHARE_BASED)
788 pmu_request(&batt_req, done_battery_state_ohare,
789 1, PMU_BATTERY_STATE);
790 else
791 pmu_request(&batt_req, done_battery_state_smart,
792 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
793 }
794
795 static int pmu_info_proc_show(struct seq_file *m, void *v)
796 {
797 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
798 seq_printf(m, "PMU firmware version : %02x\n", pmu_version);
799 seq_printf(m, "AC Power : %d\n",
800 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
801 seq_printf(m, "Battery count : %d\n", pmu_battery_count);
802
803 return 0;
804 }
805
806 static int pmu_info_proc_open(struct inode *inode, struct file *file)
807 {
808 return single_open(file, pmu_info_proc_show, NULL);
809 }
810
811 static const struct file_operations pmu_info_proc_fops = {
812 .owner = THIS_MODULE,
813 .open = pmu_info_proc_open,
814 .read = seq_read,
815 .llseek = seq_lseek,
816 .release = single_release,
817 };
818
819 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
820 {
821 int i;
822 static const char *irq_names[] = {
823 "Total CB1 triggered events",
824 "Total GPIO1 triggered events",
825 "PC-Card eject button",
826 "Sound/Brightness button",
827 "ADB message",
828 "Battery state change",
829 "Environment interrupt",
830 "Tick timer",
831 "Ghost interrupt (zero len)",
832 "Empty interrupt (empty mask)",
833 "Max irqs in a row"
834 };
835
836 for (i=0; i<11; i++) {
837 seq_printf(m, " %2u: %10u (%s)\n",
838 i, pmu_irq_stats[i], irq_names[i]);
839 }
840 return 0;
841 }
842
843 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
844 {
845 return single_open(file, pmu_irqstats_proc_show, NULL);
846 }
847
848 static const struct file_operations pmu_irqstats_proc_fops = {
849 .owner = THIS_MODULE,
850 .open = pmu_irqstats_proc_open,
851 .read = seq_read,
852 .llseek = seq_lseek,
853 .release = single_release,
854 };
855
856 static int pmu_battery_proc_show(struct seq_file *m, void *v)
857 {
858 long batnum = (long)m->private;
859
860 seq_putc(m, '\n');
861 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags);
862 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge);
863 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
864 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage);
865 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage);
866 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining);
867 return 0;
868 }
869
870 static int pmu_battery_proc_open(struct inode *inode, struct file *file)
871 {
872 return single_open(file, pmu_battery_proc_show, PDE(inode)->data);
873 }
874
875 static const struct file_operations pmu_battery_proc_fops = {
876 .owner = THIS_MODULE,
877 .open = pmu_battery_proc_open,
878 .read = seq_read,
879 .llseek = seq_lseek,
880 .release = single_release,
881 };
882
883 static int pmu_options_proc_show(struct seq_file *m, void *v)
884 {
885 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
886 if (pmu_kind == PMU_KEYLARGO_BASED &&
887 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
888 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
889 #endif
890 if (pmu_kind == PMU_KEYLARGO_BASED)
891 seq_printf(m, "server_mode=%d\n", option_server_mode);
892
893 return 0;
894 }
895
896 static int pmu_options_proc_open(struct inode *inode, struct file *file)
897 {
898 return single_open(file, pmu_options_proc_show, NULL);
899 }
900
901 static ssize_t pmu_options_proc_write(struct file *file,
902 const char __user *buffer, size_t count, loff_t *pos)
903 {
904 char tmp[33];
905 char *label, *val;
906 size_t fcount = count;
907
908 if (!count)
909 return -EINVAL;
910 if (count > 32)
911 count = 32;
912 if (copy_from_user(tmp, buffer, count))
913 return -EFAULT;
914 tmp[count] = 0;
915
916 label = tmp;
917 while(*label == ' ')
918 label++;
919 val = label;
920 while(*val && (*val != '=')) {
921 if (*val == ' ')
922 *val = 0;
923 val++;
924 }
925 if ((*val) == 0)
926 return -EINVAL;
927 *(val++) = 0;
928 while(*val == ' ')
929 val++;
930 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
931 if (pmu_kind == PMU_KEYLARGO_BASED &&
932 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
933 if (!strcmp(label, "lid_wakeup"))
934 option_lid_wakeup = ((*val) == '1');
935 #endif
936 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
937 int new_value;
938 new_value = ((*val) == '1');
939 if (new_value != option_server_mode)
940 pmu_set_server_mode(new_value);
941 }
942 return fcount;
943 }
944
945 static const struct file_operations pmu_options_proc_fops = {
946 .owner = THIS_MODULE,
947 .open = pmu_options_proc_open,
948 .read = seq_read,
949 .llseek = seq_lseek,
950 .release = single_release,
951 .write = pmu_options_proc_write,
952 };
953
954 #ifdef CONFIG_ADB
955 /* Send an ADB command */
956 static int pmu_send_request(struct adb_request *req, int sync)
957 {
958 int i, ret;
959
960 if ((vias == NULL) || (!pmu_fully_inited)) {
961 req->complete = 1;
962 return -ENXIO;
963 }
964
965 ret = -EINVAL;
966
967 switch (req->data[0]) {
968 case PMU_PACKET:
969 for (i = 0; i < req->nbytes - 1; ++i)
970 req->data[i] = req->data[i+1];
971 --req->nbytes;
972 if (pmu_data_len[req->data[0]][1] != 0) {
973 req->reply[0] = ADB_RET_OK;
974 req->reply_len = 1;
975 } else
976 req->reply_len = 0;
977 ret = pmu_queue_request(req);
978 break;
979 case CUDA_PACKET:
980 switch (req->data[1]) {
981 case CUDA_GET_TIME:
982 if (req->nbytes != 2)
983 break;
984 req->data[0] = PMU_READ_RTC;
985 req->nbytes = 1;
986 req->reply_len = 3;
987 req->reply[0] = CUDA_PACKET;
988 req->reply[1] = 0;
989 req->reply[2] = CUDA_GET_TIME;
990 ret = pmu_queue_request(req);
991 break;
992 case CUDA_SET_TIME:
993 if (req->nbytes != 6)
994 break;
995 req->data[0] = PMU_SET_RTC;
996 req->nbytes = 5;
997 for (i = 1; i <= 4; ++i)
998 req->data[i] = req->data[i+1];
999 req->reply_len = 3;
1000 req->reply[0] = CUDA_PACKET;
1001 req->reply[1] = 0;
1002 req->reply[2] = CUDA_SET_TIME;
1003 ret = pmu_queue_request(req);
1004 break;
1005 }
1006 break;
1007 case ADB_PACKET:
1008 if (!pmu_has_adb)
1009 return -ENXIO;
1010 for (i = req->nbytes - 1; i > 1; --i)
1011 req->data[i+2] = req->data[i];
1012 req->data[3] = req->nbytes - 2;
1013 req->data[2] = pmu_adb_flags;
1014 /*req->data[1] = req->data[1];*/
1015 req->data[0] = PMU_ADB_CMD;
1016 req->nbytes += 2;
1017 req->reply_expected = 1;
1018 req->reply_len = 0;
1019 ret = pmu_queue_request(req);
1020 break;
1021 }
1022 if (ret) {
1023 req->complete = 1;
1024 return ret;
1025 }
1026
1027 if (sync)
1028 while (!req->complete)
1029 pmu_poll();
1030
1031 return 0;
1032 }
1033
1034 /* Enable/disable autopolling */
1035 static int __pmu_adb_autopoll(int devs)
1036 {
1037 struct adb_request req;
1038
1039 if (devs) {
1040 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1041 adb_dev_map >> 8, adb_dev_map);
1042 pmu_adb_flags = 2;
1043 } else {
1044 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1045 pmu_adb_flags = 0;
1046 }
1047 while (!req.complete)
1048 pmu_poll();
1049 return 0;
1050 }
1051
1052 static int pmu_adb_autopoll(int devs)
1053 {
1054 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1055 return -ENXIO;
1056
1057 adb_dev_map = devs;
1058 return __pmu_adb_autopoll(devs);
1059 }
1060
1061 /* Reset the ADB bus */
1062 static int pmu_adb_reset_bus(void)
1063 {
1064 struct adb_request req;
1065 int save_autopoll = adb_dev_map;
1066
1067 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1068 return -ENXIO;
1069
1070 /* anyone got a better idea?? */
1071 __pmu_adb_autopoll(0);
1072
1073 req.nbytes = 4;
1074 req.done = NULL;
1075 req.data[0] = PMU_ADB_CMD;
1076 req.data[1] = ADB_BUSRESET;
1077 req.data[2] = 0;
1078 req.data[3] = 0;
1079 req.data[4] = 0;
1080 req.reply_len = 0;
1081 req.reply_expected = 1;
1082 if (pmu_queue_request(&req) != 0) {
1083 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1084 return -EIO;
1085 }
1086 pmu_wait_complete(&req);
1087
1088 if (save_autopoll != 0)
1089 __pmu_adb_autopoll(save_autopoll);
1090
1091 return 0;
1092 }
1093 #endif /* CONFIG_ADB */
1094
1095 /* Construct and send a pmu request */
1096 int
1097 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1098 int nbytes, ...)
1099 {
1100 va_list list;
1101 int i;
1102
1103 if (vias == NULL)
1104 return -ENXIO;
1105
1106 if (nbytes < 0 || nbytes > 32) {
1107 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1108 req->complete = 1;
1109 return -EINVAL;
1110 }
1111 req->nbytes = nbytes;
1112 req->done = done;
1113 va_start(list, nbytes);
1114 for (i = 0; i < nbytes; ++i)
1115 req->data[i] = va_arg(list, int);
1116 va_end(list);
1117 req->reply_len = 0;
1118 req->reply_expected = 0;
1119 return pmu_queue_request(req);
1120 }
1121
1122 int
1123 pmu_queue_request(struct adb_request *req)
1124 {
1125 unsigned long flags;
1126 int nsend;
1127
1128 if (via == NULL) {
1129 req->complete = 1;
1130 return -ENXIO;
1131 }
1132 if (req->nbytes <= 0) {
1133 req->complete = 1;
1134 return 0;
1135 }
1136 nsend = pmu_data_len[req->data[0]][0];
1137 if (nsend >= 0 && req->nbytes != nsend + 1) {
1138 req->complete = 1;
1139 return -EINVAL;
1140 }
1141
1142 req->next = NULL;
1143 req->sent = 0;
1144 req->complete = 0;
1145
1146 spin_lock_irqsave(&pmu_lock, flags);
1147 if (current_req != 0) {
1148 last_req->next = req;
1149 last_req = req;
1150 } else {
1151 current_req = req;
1152 last_req = req;
1153 if (pmu_state == idle)
1154 pmu_start();
1155 }
1156 spin_unlock_irqrestore(&pmu_lock, flags);
1157
1158 return 0;
1159 }
1160
1161 static inline void
1162 wait_for_ack(void)
1163 {
1164 /* Sightly increased the delay, I had one occurrence of the message
1165 * reported
1166 */
1167 int timeout = 4000;
1168 while ((in_8(&via[B]) & TACK) == 0) {
1169 if (--timeout < 0) {
1170 printk(KERN_ERR "PMU not responding (!ack)\n");
1171 return;
1172 }
1173 udelay(10);
1174 }
1175 }
1176
1177 /* New PMU seems to be very sensitive to those timings, so we make sure
1178 * PCI is flushed immediately */
1179 static inline void
1180 send_byte(int x)
1181 {
1182 volatile unsigned char __iomem *v = via;
1183
1184 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1185 out_8(&v[SR], x);
1186 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
1187 (void)in_8(&v[B]);
1188 }
1189
1190 static inline void
1191 recv_byte(void)
1192 {
1193 volatile unsigned char __iomem *v = via;
1194
1195 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1196 in_8(&v[SR]); /* resets SR */
1197 out_8(&v[B], in_8(&v[B]) & ~TREQ);
1198 (void)in_8(&v[B]);
1199 }
1200
1201 static inline void
1202 pmu_done(struct adb_request *req)
1203 {
1204 void (*done)(struct adb_request *) = req->done;
1205 mb();
1206 req->complete = 1;
1207 /* Here, we assume that if the request has a done member, the
1208 * struct request will survive to setting req->complete to 1
1209 */
1210 if (done)
1211 (*done)(req);
1212 }
1213
1214 static void
1215 pmu_start(void)
1216 {
1217 struct adb_request *req;
1218
1219 /* assert pmu_state == idle */
1220 /* get the packet to send */
1221 req = current_req;
1222 if (req == 0 || pmu_state != idle
1223 || (/*req->reply_expected && */req_awaiting_reply))
1224 return;
1225
1226 pmu_state = sending;
1227 data_index = 1;
1228 data_len = pmu_data_len[req->data[0]][0];
1229
1230 /* Sounds safer to make sure ACK is high before writing. This helped
1231 * kill a problem with ADB and some iBooks
1232 */
1233 wait_for_ack();
1234 /* set the shift register to shift out and send a byte */
1235 send_byte(req->data[0]);
1236 }
1237
1238 void
1239 pmu_poll(void)
1240 {
1241 if (!via)
1242 return;
1243 if (disable_poll)
1244 return;
1245 via_pmu_interrupt(0, NULL);
1246 }
1247
1248 void
1249 pmu_poll_adb(void)
1250 {
1251 if (!via)
1252 return;
1253 if (disable_poll)
1254 return;
1255 /* Kicks ADB read when PMU is suspended */
1256 adb_int_pending = 1;
1257 do {
1258 via_pmu_interrupt(0, NULL);
1259 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1260 || req_awaiting_reply));
1261 }
1262
1263 void
1264 pmu_wait_complete(struct adb_request *req)
1265 {
1266 if (!via)
1267 return;
1268 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1269 via_pmu_interrupt(0, NULL);
1270 }
1271
1272 /* This function loops until the PMU is idle and prevents it from
1273 * anwsering to ADB interrupts. pmu_request can still be called.
1274 * This is done to avoid spurrious shutdowns when we know we'll have
1275 * interrupts switched off for a long time
1276 */
1277 void
1278 pmu_suspend(void)
1279 {
1280 unsigned long flags;
1281
1282 if (!via)
1283 return;
1284
1285 spin_lock_irqsave(&pmu_lock, flags);
1286 pmu_suspended++;
1287 if (pmu_suspended > 1) {
1288 spin_unlock_irqrestore(&pmu_lock, flags);
1289 return;
1290 }
1291
1292 do {
1293 spin_unlock_irqrestore(&pmu_lock, flags);
1294 if (req_awaiting_reply)
1295 adb_int_pending = 1;
1296 via_pmu_interrupt(0, NULL);
1297 spin_lock_irqsave(&pmu_lock, flags);
1298 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1299 if (gpio_irq >= 0)
1300 disable_irq_nosync(gpio_irq);
1301 out_8(&via[IER], CB1_INT | IER_CLR);
1302 spin_unlock_irqrestore(&pmu_lock, flags);
1303 break;
1304 }
1305 } while (1);
1306 }
1307
1308 void
1309 pmu_resume(void)
1310 {
1311 unsigned long flags;
1312
1313 if (!via || (pmu_suspended < 1))
1314 return;
1315
1316 spin_lock_irqsave(&pmu_lock, flags);
1317 pmu_suspended--;
1318 if (pmu_suspended > 0) {
1319 spin_unlock_irqrestore(&pmu_lock, flags);
1320 return;
1321 }
1322 adb_int_pending = 1;
1323 if (gpio_irq >= 0)
1324 enable_irq(gpio_irq);
1325 out_8(&via[IER], CB1_INT | IER_SET);
1326 spin_unlock_irqrestore(&pmu_lock, flags);
1327 pmu_poll();
1328 }
1329
1330 /* Interrupt data could be the result data from an ADB cmd */
1331 static void
1332 pmu_handle_data(unsigned char *data, int len)
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 (len == 4 && data[1] == 0x2c) {
1391 extern int xmon_wants_key, xmon_adb_keycode;
1392 if (xmon_wants_key) {
1393 xmon_adb_keycode = data[2];
1394 return;
1395 }
1396 }
1397 #ifdef CONFIG_ADB
1398 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1399 && data[1] == 0x2c && data[3] == 0xff
1400 && (data[2] & ~1) == 0xf4))
1401 adb_input(data+1, len-1, 1);
1402 #endif /* CONFIG_ADB */
1403 }
1404 }
1405 /* Sound/brightness button pressed */
1406 else if ((1 << pirq) & PMU_INT_SNDBRT) {
1407 #ifdef CONFIG_PMAC_BACKLIGHT
1408 if (len == 3)
1409 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1410 #endif
1411 }
1412 /* Tick interrupt */
1413 else if ((1 << pirq) & PMU_INT_TICK) {
1414 /* Environement or tick interrupt, query batteries */
1415 if (pmu_battery_count) {
1416 if ((--query_batt_timer) == 0) {
1417 query_battery_state();
1418 query_batt_timer = BATTERY_POLLING_COUNT;
1419 }
1420 }
1421 }
1422 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1423 if (pmu_battery_count)
1424 query_battery_state();
1425 pmu_pass_intr(data, len);
1426 /* len == 6 is probably a bad check. But how do I
1427 * know what PMU versions send what events here? */
1428 if (len == 6) {
1429 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1430 via_pmu_event(PMU_EVT_LID, data[1]&1);
1431 }
1432 } else {
1433 pmu_pass_intr(data, len);
1434 }
1435 goto next;
1436 }
1437
1438 static struct adb_request*
1439 pmu_sr_intr(void)
1440 {
1441 struct adb_request *req;
1442 int bite = 0;
1443
1444 if (via[B] & TREQ) {
1445 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1446 out_8(&via[IFR], SR_INT);
1447 return NULL;
1448 }
1449 /* The ack may not yet be low when we get the interrupt */
1450 while ((in_8(&via[B]) & TACK) != 0)
1451 ;
1452
1453 /* if reading grab the byte, and reset the interrupt */
1454 if (pmu_state == reading || pmu_state == reading_intr)
1455 bite = in_8(&via[SR]);
1456
1457 /* reset TREQ and wait for TACK to go high */
1458 out_8(&via[B], in_8(&via[B]) | TREQ);
1459 wait_for_ack();
1460
1461 switch (pmu_state) {
1462 case sending:
1463 req = current_req;
1464 if (data_len < 0) {
1465 data_len = req->nbytes - 1;
1466 send_byte(data_len);
1467 break;
1468 }
1469 if (data_index <= data_len) {
1470 send_byte(req->data[data_index++]);
1471 break;
1472 }
1473 req->sent = 1;
1474 data_len = pmu_data_len[req->data[0]][1];
1475 if (data_len == 0) {
1476 pmu_state = idle;
1477 current_req = req->next;
1478 if (req->reply_expected)
1479 req_awaiting_reply = req;
1480 else
1481 return req;
1482 } else {
1483 pmu_state = reading;
1484 data_index = 0;
1485 reply_ptr = req->reply + req->reply_len;
1486 recv_byte();
1487 }
1488 break;
1489
1490 case intack:
1491 data_index = 0;
1492 data_len = -1;
1493 pmu_state = reading_intr;
1494 reply_ptr = interrupt_data[int_data_last];
1495 recv_byte();
1496 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1497 enable_irq(gpio_irq);
1498 gpio_irq_enabled = 1;
1499 }
1500 break;
1501
1502 case reading:
1503 case reading_intr:
1504 if (data_len == -1) {
1505 data_len = bite;
1506 if (bite > 32)
1507 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1508 } else if (data_index < 32) {
1509 reply_ptr[data_index++] = bite;
1510 }
1511 if (data_index < data_len) {
1512 recv_byte();
1513 break;
1514 }
1515
1516 if (pmu_state == reading_intr) {
1517 pmu_state = idle;
1518 int_data_state[int_data_last] = int_data_ready;
1519 interrupt_data_len[int_data_last] = data_len;
1520 } else {
1521 req = current_req;
1522 /*
1523 * For PMU sleep and freq change requests, we lock the
1524 * PMU until it's explicitly unlocked. This avoids any
1525 * spurrious event polling getting in
1526 */
1527 current_req = req->next;
1528 req->reply_len += data_index;
1529 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1530 pmu_state = locked;
1531 else
1532 pmu_state = idle;
1533 return req;
1534 }
1535 break;
1536
1537 default:
1538 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1539 pmu_state);
1540 }
1541 return NULL;
1542 }
1543
1544 static irqreturn_t
1545 via_pmu_interrupt(int irq, void *arg)
1546 {
1547 unsigned long flags;
1548 int intr;
1549 int nloop = 0;
1550 int int_data = -1;
1551 struct adb_request *req = NULL;
1552 int handled = 0;
1553
1554 /* This is a bit brutal, we can probably do better */
1555 spin_lock_irqsave(&pmu_lock, flags);
1556 ++disable_poll;
1557
1558 for (;;) {
1559 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1560 if (intr == 0)
1561 break;
1562 handled = 1;
1563 if (++nloop > 1000) {
1564 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1565 "intr=%x, ier=%x pmu_state=%d\n",
1566 intr, in_8(&via[IER]), pmu_state);
1567 break;
1568 }
1569 out_8(&via[IFR], intr);
1570 if (intr & CB1_INT) {
1571 adb_int_pending = 1;
1572 pmu_irq_stats[0]++;
1573 }
1574 if (intr & SR_INT) {
1575 req = pmu_sr_intr();
1576 if (req)
1577 break;
1578 }
1579 }
1580
1581 recheck:
1582 if (pmu_state == idle) {
1583 if (adb_int_pending) {
1584 if (int_data_state[0] == int_data_empty)
1585 int_data_last = 0;
1586 else if (int_data_state[1] == int_data_empty)
1587 int_data_last = 1;
1588 else
1589 goto no_free_slot;
1590 pmu_state = intack;
1591 int_data_state[int_data_last] = int_data_fill;
1592 /* Sounds safer to make sure ACK is high before writing.
1593 * This helped kill a problem with ADB and some iBooks
1594 */
1595 wait_for_ack();
1596 send_byte(PMU_INT_ACK);
1597 adb_int_pending = 0;
1598 } else if (current_req)
1599 pmu_start();
1600 }
1601 no_free_slot:
1602 /* Mark the oldest buffer for flushing */
1603 if (int_data_state[!int_data_last] == int_data_ready) {
1604 int_data_state[!int_data_last] = int_data_flush;
1605 int_data = !int_data_last;
1606 } else if (int_data_state[int_data_last] == int_data_ready) {
1607 int_data_state[int_data_last] = int_data_flush;
1608 int_data = int_data_last;
1609 }
1610 --disable_poll;
1611 spin_unlock_irqrestore(&pmu_lock, flags);
1612
1613 /* Deal with completed PMU requests outside of the lock */
1614 if (req) {
1615 pmu_done(req);
1616 req = NULL;
1617 }
1618
1619 /* Deal with interrupt datas outside of the lock */
1620 if (int_data >= 0) {
1621 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1622 spin_lock_irqsave(&pmu_lock, flags);
1623 ++disable_poll;
1624 int_data_state[int_data] = int_data_empty;
1625 int_data = -1;
1626 goto recheck;
1627 }
1628
1629 return IRQ_RETVAL(handled);
1630 }
1631
1632 void
1633 pmu_unlock(void)
1634 {
1635 unsigned long flags;
1636
1637 spin_lock_irqsave(&pmu_lock, flags);
1638 if (pmu_state == locked)
1639 pmu_state = idle;
1640 adb_int_pending = 1;
1641 spin_unlock_irqrestore(&pmu_lock, flags);
1642 }
1643
1644
1645 static irqreturn_t
1646 gpio1_interrupt(int irq, void *arg)
1647 {
1648 unsigned long flags;
1649
1650 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1651 spin_lock_irqsave(&pmu_lock, flags);
1652 if (gpio_irq_enabled > 0) {
1653 disable_irq_nosync(gpio_irq);
1654 gpio_irq_enabled = 0;
1655 }
1656 pmu_irq_stats[1]++;
1657 adb_int_pending = 1;
1658 spin_unlock_irqrestore(&pmu_lock, flags);
1659 via_pmu_interrupt(0, NULL);
1660 return IRQ_HANDLED;
1661 }
1662 return IRQ_NONE;
1663 }
1664
1665 void
1666 pmu_enable_irled(int on)
1667 {
1668 struct adb_request req;
1669
1670 if (vias == NULL)
1671 return ;
1672 if (pmu_kind == PMU_KEYLARGO_BASED)
1673 return ;
1674
1675 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1676 (on ? PMU_POW_ON : PMU_POW_OFF));
1677 pmu_wait_complete(&req);
1678 }
1679
1680 void
1681 pmu_restart(void)
1682 {
1683 struct adb_request req;
1684
1685 if (via == NULL)
1686 return;
1687
1688 local_irq_disable();
1689
1690 drop_interrupts = 1;
1691
1692 if (pmu_kind != PMU_KEYLARGO_BASED) {
1693 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1694 PMU_INT_TICK );
1695 while(!req.complete)
1696 pmu_poll();
1697 }
1698
1699 pmu_request(&req, NULL, 1, PMU_RESET);
1700 pmu_wait_complete(&req);
1701 for (;;)
1702 ;
1703 }
1704
1705 void
1706 pmu_shutdown(void)
1707 {
1708 struct adb_request req;
1709
1710 if (via == NULL)
1711 return;
1712
1713 local_irq_disable();
1714
1715 drop_interrupts = 1;
1716
1717 if (pmu_kind != PMU_KEYLARGO_BASED) {
1718 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1719 PMU_INT_TICK );
1720 pmu_wait_complete(&req);
1721 } else {
1722 /* Disable server mode on shutdown or we'll just
1723 * wake up again
1724 */
1725 pmu_set_server_mode(0);
1726 }
1727
1728 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1729 'M', 'A', 'T', 'T');
1730 pmu_wait_complete(&req);
1731 for (;;)
1732 ;
1733 }
1734
1735 int
1736 pmu_present(void)
1737 {
1738 return via != 0;
1739 }
1740
1741 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1742 /*
1743 * Put the powerbook to sleep.
1744 */
1745
1746 static u32 save_via[8];
1747
1748 static void
1749 save_via_state(void)
1750 {
1751 save_via[0] = in_8(&via[ANH]);
1752 save_via[1] = in_8(&via[DIRA]);
1753 save_via[2] = in_8(&via[B]);
1754 save_via[3] = in_8(&via[DIRB]);
1755 save_via[4] = in_8(&via[PCR]);
1756 save_via[5] = in_8(&via[ACR]);
1757 save_via[6] = in_8(&via[T1CL]);
1758 save_via[7] = in_8(&via[T1CH]);
1759 }
1760 static void
1761 restore_via_state(void)
1762 {
1763 out_8(&via[ANH], save_via[0]);
1764 out_8(&via[DIRA], save_via[1]);
1765 out_8(&via[B], save_via[2]);
1766 out_8(&via[DIRB], save_via[3]);
1767 out_8(&via[PCR], save_via[4]);
1768 out_8(&via[ACR], save_via[5]);
1769 out_8(&via[T1CL], save_via[6]);
1770 out_8(&via[T1CH], save_via[7]);
1771 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
1772 out_8(&via[IFR], 0x7f); /* clear IFR */
1773 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1774 }
1775
1776 #define GRACKLE_PM (1<<7)
1777 #define GRACKLE_DOZE (1<<5)
1778 #define GRACKLE_NAP (1<<4)
1779 #define GRACKLE_SLEEP (1<<3)
1780
1781 static int powerbook_sleep_grackle(void)
1782 {
1783 unsigned long save_l2cr;
1784 unsigned short pmcr1;
1785 struct adb_request req;
1786 struct pci_dev *grackle;
1787
1788 grackle = pci_get_bus_and_slot(0, 0);
1789 if (!grackle)
1790 return -ENODEV;
1791
1792 /* Turn off various things. Darwin does some retry tests here... */
1793 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1794 pmu_wait_complete(&req);
1795 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1796 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1797 pmu_wait_complete(&req);
1798
1799 /* For 750, save backside cache setting and disable it */
1800 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1801
1802 if (!__fake_sleep) {
1803 /* Ask the PMU to put us to sleep */
1804 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1805 pmu_wait_complete(&req);
1806 }
1807
1808 /* The VIA is supposed not to be restored correctly*/
1809 save_via_state();
1810 /* We shut down some HW */
1811 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1812
1813 pci_read_config_word(grackle, 0x70, &pmcr1);
1814 /* Apparently, MacOS uses NAP mode for Grackle ??? */
1815 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1816 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1817 pci_write_config_word(grackle, 0x70, pmcr1);
1818
1819 /* Call low-level ASM sleep handler */
1820 if (__fake_sleep)
1821 mdelay(5000);
1822 else
1823 low_sleep_handler();
1824
1825 /* We're awake again, stop grackle PM */
1826 pci_read_config_word(grackle, 0x70, &pmcr1);
1827 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1828 pci_write_config_word(grackle, 0x70, pmcr1);
1829
1830 pci_dev_put(grackle);
1831
1832 /* Make sure the PMU is idle */
1833 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1834 restore_via_state();
1835
1836 /* Restore L2 cache */
1837 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1838 _set_L2CR(save_l2cr);
1839
1840 /* Restore userland MMU context */
1841 switch_mmu_context(NULL, current->active_mm);
1842
1843 /* Power things up */
1844 pmu_unlock();
1845 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1846 pmu_wait_complete(&req);
1847 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1848 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1849 pmu_wait_complete(&req);
1850 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1851 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1852 pmu_wait_complete(&req);
1853
1854 return 0;
1855 }
1856
1857 static int
1858 powerbook_sleep_Core99(void)
1859 {
1860 unsigned long save_l2cr;
1861 unsigned long save_l3cr;
1862 struct adb_request req;
1863
1864 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1865 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1866 return -ENOSYS;
1867 }
1868
1869 if (num_online_cpus() > 1 || cpu_is_offline(0))
1870 return -EAGAIN;
1871
1872 /* Stop environment and ADB interrupts */
1873 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1874 pmu_wait_complete(&req);
1875
1876 /* Tell PMU what events will wake us up */
1877 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1878 0xff, 0xff);
1879 pmu_wait_complete(&req);
1880 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1881 0, PMU_PWR_WAKEUP_KEY |
1882 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1883 pmu_wait_complete(&req);
1884
1885 /* Save the state of the L2 and L3 caches */
1886 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
1887 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1888
1889 if (!__fake_sleep) {
1890 /* Ask the PMU to put us to sleep */
1891 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1892 pmu_wait_complete(&req);
1893 }
1894
1895 /* The VIA is supposed not to be restored correctly*/
1896 save_via_state();
1897
1898 /* Shut down various ASICs. There's a chance that we can no longer
1899 * talk to the PMU after this, so I moved it to _after_ sending the
1900 * sleep command to it. Still need to be checked.
1901 */
1902 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1903
1904 /* Call low-level ASM sleep handler */
1905 if (__fake_sleep)
1906 mdelay(5000);
1907 else
1908 low_sleep_handler();
1909
1910 /* Restore Apple core ASICs state */
1911 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1912
1913 /* Restore VIA */
1914 restore_via_state();
1915
1916 /* tweak LPJ before cpufreq is there */
1917 loops_per_jiffy *= 2;
1918
1919 /* Restore video */
1920 pmac_call_early_video_resume();
1921
1922 /* Restore L2 cache */
1923 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1924 _set_L2CR(save_l2cr);
1925 /* Restore L3 cache */
1926 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1927 _set_L3CR(save_l3cr);
1928
1929 /* Restore userland MMU context */
1930 switch_mmu_context(NULL, current->active_mm);
1931
1932 /* Tell PMU we are ready */
1933 pmu_unlock();
1934 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1935 pmu_wait_complete(&req);
1936 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1937 pmu_wait_complete(&req);
1938
1939 /* Restore LPJ, cpufreq will adjust the cpu frequency */
1940 loops_per_jiffy /= 2;
1941
1942 return 0;
1943 }
1944
1945 #define PB3400_MEM_CTRL 0xf8000000
1946 #define PB3400_MEM_CTRL_SLEEP 0x70
1947
1948 static void __iomem *pb3400_mem_ctrl;
1949
1950 static void powerbook_sleep_init_3400(void)
1951 {
1952 /* map in the memory controller registers */
1953 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1954 if (pb3400_mem_ctrl == NULL)
1955 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1956 }
1957
1958 static int powerbook_sleep_3400(void)
1959 {
1960 int i, x;
1961 unsigned int hid0;
1962 unsigned long msr;
1963 struct adb_request sleep_req;
1964 unsigned int __iomem *mem_ctrl_sleep;
1965
1966 if (pb3400_mem_ctrl == NULL)
1967 return -ENOMEM;
1968 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1969
1970 /* Set the memory controller to keep the memory refreshed
1971 while we're asleep */
1972 for (i = 0x403f; i >= 0x4000; --i) {
1973 out_be32(mem_ctrl_sleep, i);
1974 do {
1975 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1976 } while (x == 0);
1977 if (x >= 0x100)
1978 break;
1979 }
1980
1981 /* Ask the PMU to put us to sleep */
1982 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1983 pmu_wait_complete(&sleep_req);
1984 pmu_unlock();
1985
1986 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1987
1988 asleep = 1;
1989
1990 /* Put the CPU into sleep mode */
1991 hid0 = mfspr(SPRN_HID0);
1992 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
1993 mtspr(SPRN_HID0, hid0);
1994 local_irq_enable();
1995 msr = mfmsr() | MSR_POW;
1996 while (asleep) {
1997 mb();
1998 mtmsr(msr);
1999 isync();
2000 }
2001 local_irq_disable();
2002
2003 /* OK, we're awake again, start restoring things */
2004 out_be32(mem_ctrl_sleep, 0x3f);
2005 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2006
2007 return 0;
2008 }
2009
2010 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2011
2012 /*
2013 * Support for /dev/pmu device
2014 */
2015 #define RB_SIZE 0x10
2016 struct pmu_private {
2017 struct list_head list;
2018 int rb_get;
2019 int rb_put;
2020 struct rb_entry {
2021 unsigned short len;
2022 unsigned char data[16];
2023 } rb_buf[RB_SIZE];
2024 wait_queue_head_t wait;
2025 spinlock_t lock;
2026 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2027 int backlight_locker;
2028 #endif
2029 };
2030
2031 static LIST_HEAD(all_pmu_pvt);
2032 static DEFINE_SPINLOCK(all_pvt_lock);
2033
2034 static void
2035 pmu_pass_intr(unsigned char *data, int len)
2036 {
2037 struct pmu_private *pp;
2038 struct list_head *list;
2039 int i;
2040 unsigned long flags;
2041
2042 if (len > sizeof(pp->rb_buf[0].data))
2043 len = sizeof(pp->rb_buf[0].data);
2044 spin_lock_irqsave(&all_pvt_lock, flags);
2045 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2046 pp = list_entry(list, struct pmu_private, list);
2047 spin_lock(&pp->lock);
2048 i = pp->rb_put + 1;
2049 if (i >= RB_SIZE)
2050 i = 0;
2051 if (i != pp->rb_get) {
2052 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2053 rp->len = len;
2054 memcpy(rp->data, data, len);
2055 pp->rb_put = i;
2056 wake_up_interruptible(&pp->wait);
2057 }
2058 spin_unlock(&pp->lock);
2059 }
2060 spin_unlock_irqrestore(&all_pvt_lock, flags);
2061 }
2062
2063 static int
2064 pmu_open(struct inode *inode, struct file *file)
2065 {
2066 struct pmu_private *pp;
2067 unsigned long flags;
2068
2069 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2070 if (pp == 0)
2071 return -ENOMEM;
2072 pp->rb_get = pp->rb_put = 0;
2073 spin_lock_init(&pp->lock);
2074 init_waitqueue_head(&pp->wait);
2075 lock_kernel();
2076 spin_lock_irqsave(&all_pvt_lock, flags);
2077 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2078 pp->backlight_locker = 0;
2079 #endif
2080 list_add(&pp->list, &all_pmu_pvt);
2081 spin_unlock_irqrestore(&all_pvt_lock, flags);
2082 file->private_data = pp;
2083 unlock_kernel();
2084 return 0;
2085 }
2086
2087 static ssize_t
2088 pmu_read(struct file *file, char __user *buf,
2089 size_t count, loff_t *ppos)
2090 {
2091 struct pmu_private *pp = file->private_data;
2092 DECLARE_WAITQUEUE(wait, current);
2093 unsigned long flags;
2094 int ret = 0;
2095
2096 if (count < 1 || pp == 0)
2097 return -EINVAL;
2098 if (!access_ok(VERIFY_WRITE, buf, count))
2099 return -EFAULT;
2100
2101 spin_lock_irqsave(&pp->lock, flags);
2102 add_wait_queue(&pp->wait, &wait);
2103 current->state = TASK_INTERRUPTIBLE;
2104
2105 for (;;) {
2106 ret = -EAGAIN;
2107 if (pp->rb_get != pp->rb_put) {
2108 int i = pp->rb_get;
2109 struct rb_entry *rp = &pp->rb_buf[i];
2110 ret = rp->len;
2111 spin_unlock_irqrestore(&pp->lock, flags);
2112 if (ret > count)
2113 ret = count;
2114 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2115 ret = -EFAULT;
2116 if (++i >= RB_SIZE)
2117 i = 0;
2118 spin_lock_irqsave(&pp->lock, flags);
2119 pp->rb_get = i;
2120 }
2121 if (ret >= 0)
2122 break;
2123 if (file->f_flags & O_NONBLOCK)
2124 break;
2125 ret = -ERESTARTSYS;
2126 if (signal_pending(current))
2127 break;
2128 spin_unlock_irqrestore(&pp->lock, flags);
2129 schedule();
2130 spin_lock_irqsave(&pp->lock, flags);
2131 }
2132 current->state = TASK_RUNNING;
2133 remove_wait_queue(&pp->wait, &wait);
2134 spin_unlock_irqrestore(&pp->lock, flags);
2135
2136 return ret;
2137 }
2138
2139 static ssize_t
2140 pmu_write(struct file *file, const char __user *buf,
2141 size_t count, loff_t *ppos)
2142 {
2143 return 0;
2144 }
2145
2146 static unsigned int
2147 pmu_fpoll(struct file *filp, poll_table *wait)
2148 {
2149 struct pmu_private *pp = filp->private_data;
2150 unsigned int mask = 0;
2151 unsigned long flags;
2152
2153 if (pp == 0)
2154 return 0;
2155 poll_wait(filp, &pp->wait, wait);
2156 spin_lock_irqsave(&pp->lock, flags);
2157 if (pp->rb_get != pp->rb_put)
2158 mask |= POLLIN;
2159 spin_unlock_irqrestore(&pp->lock, flags);
2160 return mask;
2161 }
2162
2163 static int
2164 pmu_release(struct inode *inode, struct file *file)
2165 {
2166 struct pmu_private *pp = file->private_data;
2167 unsigned long flags;
2168
2169 if (pp != 0) {
2170 file->private_data = NULL;
2171 spin_lock_irqsave(&all_pvt_lock, flags);
2172 list_del(&pp->list);
2173 spin_unlock_irqrestore(&all_pvt_lock, flags);
2174
2175 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2176 if (pp->backlight_locker)
2177 pmac_backlight_enable();
2178 #endif
2179
2180 kfree(pp);
2181 }
2182 return 0;
2183 }
2184
2185 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2186 static void pmac_suspend_disable_irqs(void)
2187 {
2188 /* Call platform functions marked "on sleep" */
2189 pmac_pfunc_i2c_suspend();
2190 pmac_pfunc_base_suspend();
2191 }
2192
2193 static int powerbook_sleep(suspend_state_t state)
2194 {
2195 int error = 0;
2196
2197 /* Wait for completion of async requests */
2198 while (!batt_req.complete)
2199 pmu_poll();
2200
2201 /* Giveup the lazy FPU & vec so we don't have to back them
2202 * up from the low level code
2203 */
2204 enable_kernel_fp();
2205
2206 #ifdef CONFIG_ALTIVEC
2207 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2208 enable_kernel_altivec();
2209 #endif /* CONFIG_ALTIVEC */
2210
2211 switch (pmu_kind) {
2212 case PMU_OHARE_BASED:
2213 error = powerbook_sleep_3400();
2214 break;
2215 case PMU_HEATHROW_BASED:
2216 case PMU_PADDINGTON_BASED:
2217 error = powerbook_sleep_grackle();
2218 break;
2219 case PMU_KEYLARGO_BASED:
2220 error = powerbook_sleep_Core99();
2221 break;
2222 default:
2223 return -ENOSYS;
2224 }
2225
2226 if (error)
2227 return error;
2228
2229 mdelay(100);
2230
2231 return 0;
2232 }
2233
2234 static void pmac_suspend_enable_irqs(void)
2235 {
2236 /* Force a poll of ADB interrupts */
2237 adb_int_pending = 1;
2238 via_pmu_interrupt(0, NULL);
2239
2240 mdelay(10);
2241
2242 /* Call platform functions marked "on wake" */
2243 pmac_pfunc_base_resume();
2244 pmac_pfunc_i2c_resume();
2245 }
2246
2247 static int pmu_sleep_valid(suspend_state_t state)
2248 {
2249 return state == PM_SUSPEND_MEM
2250 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2251 }
2252
2253 static struct platform_suspend_ops pmu_pm_ops = {
2254 .enter = powerbook_sleep,
2255 .valid = pmu_sleep_valid,
2256 };
2257
2258 static int register_pmu_pm_ops(void)
2259 {
2260 if (pmu_kind == PMU_OHARE_BASED)
2261 powerbook_sleep_init_3400();
2262 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2263 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2264 suspend_set_ops(&pmu_pm_ops);
2265
2266 return 0;
2267 }
2268
2269 device_initcall(register_pmu_pm_ops);
2270 #endif
2271
2272 static int pmu_ioctl(struct file *filp,
2273 u_int cmd, u_long arg)
2274 {
2275 __u32 __user *argp = (__u32 __user *)arg;
2276 int error = -EINVAL;
2277
2278 switch (cmd) {
2279 case PMU_IOC_SLEEP:
2280 if (!capable(CAP_SYS_ADMIN))
2281 return -EACCES;
2282 return pm_suspend(PM_SUSPEND_MEM);
2283 case PMU_IOC_CAN_SLEEP:
2284 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2285 return put_user(0, argp);
2286 else
2287 return put_user(1, argp);
2288
2289 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2290 /* Compatibility ioctl's for backlight */
2291 case PMU_IOC_GET_BACKLIGHT:
2292 {
2293 int brightness;
2294
2295 brightness = pmac_backlight_get_legacy_brightness();
2296 if (brightness < 0)
2297 return brightness;
2298 else
2299 return put_user(brightness, argp);
2300
2301 }
2302 case PMU_IOC_SET_BACKLIGHT:
2303 {
2304 int brightness;
2305
2306 error = get_user(brightness, argp);
2307 if (error)
2308 return error;
2309
2310 return pmac_backlight_set_legacy_brightness(brightness);
2311 }
2312 #ifdef CONFIG_INPUT_ADBHID
2313 case PMU_IOC_GRAB_BACKLIGHT: {
2314 struct pmu_private *pp = filp->private_data;
2315
2316 if (pp->backlight_locker)
2317 return 0;
2318
2319 pp->backlight_locker = 1;
2320 pmac_backlight_disable();
2321
2322 return 0;
2323 }
2324 #endif /* CONFIG_INPUT_ADBHID */
2325 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2326
2327 case PMU_IOC_GET_MODEL:
2328 return put_user(pmu_kind, argp);
2329 case PMU_IOC_HAS_ADB:
2330 return put_user(pmu_has_adb, argp);
2331 }
2332 return error;
2333 }
2334
2335 static long pmu_unlocked_ioctl(struct file *filp,
2336 u_int cmd, u_long arg)
2337 {
2338 int ret;
2339
2340 lock_kernel();
2341 ret = pmu_ioctl(filp, cmd, arg);
2342 unlock_kernel();
2343
2344 return ret;
2345 }
2346
2347 #ifdef CONFIG_COMPAT
2348 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2349 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2350 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t)
2351 #define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t)
2352 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t)
2353 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2354
2355 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2356 {
2357 switch (cmd) {
2358 case PMU_IOC_SLEEP:
2359 break;
2360 case PMU_IOC_GET_BACKLIGHT32:
2361 cmd = PMU_IOC_GET_BACKLIGHT;
2362 break;
2363 case PMU_IOC_SET_BACKLIGHT32:
2364 cmd = PMU_IOC_SET_BACKLIGHT;
2365 break;
2366 case PMU_IOC_GET_MODEL32:
2367 cmd = PMU_IOC_GET_MODEL;
2368 break;
2369 case PMU_IOC_HAS_ADB32:
2370 cmd = PMU_IOC_HAS_ADB;
2371 break;
2372 case PMU_IOC_CAN_SLEEP32:
2373 cmd = PMU_IOC_CAN_SLEEP;
2374 break;
2375 case PMU_IOC_GRAB_BACKLIGHT32:
2376 cmd = PMU_IOC_GRAB_BACKLIGHT;
2377 break;
2378 default:
2379 return -ENOIOCTLCMD;
2380 }
2381 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2382 }
2383 #endif
2384
2385 static const struct file_operations pmu_device_fops = {
2386 .read = pmu_read,
2387 .write = pmu_write,
2388 .poll = pmu_fpoll,
2389 .unlocked_ioctl = pmu_unlocked_ioctl,
2390 #ifdef CONFIG_COMPAT
2391 .compat_ioctl = compat_pmu_ioctl,
2392 #endif
2393 .open = pmu_open,
2394 .release = pmu_release,
2395 };
2396
2397 static struct miscdevice pmu_device = {
2398 PMU_MINOR, "pmu", &pmu_device_fops
2399 };
2400
2401 static int pmu_device_init(void)
2402 {
2403 if (!via)
2404 return 0;
2405 if (misc_register(&pmu_device) < 0)
2406 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2407 return 0;
2408 }
2409 device_initcall(pmu_device_init);
2410
2411
2412 #ifdef DEBUG_SLEEP
2413 static inline void
2414 polled_handshake(volatile unsigned char __iomem *via)
2415 {
2416 via[B] &= ~TREQ; eieio();
2417 while ((via[B] & TACK) != 0)
2418 ;
2419 via[B] |= TREQ; eieio();
2420 while ((via[B] & TACK) == 0)
2421 ;
2422 }
2423
2424 static inline void
2425 polled_send_byte(volatile unsigned char __iomem *via, int x)
2426 {
2427 via[ACR] |= SR_OUT | SR_EXT; eieio();
2428 via[SR] = x; eieio();
2429 polled_handshake(via);
2430 }
2431
2432 static inline int
2433 polled_recv_byte(volatile unsigned char __iomem *via)
2434 {
2435 int x;
2436
2437 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2438 x = via[SR]; eieio();
2439 polled_handshake(via);
2440 x = via[SR]; eieio();
2441 return x;
2442 }
2443
2444 int
2445 pmu_polled_request(struct adb_request *req)
2446 {
2447 unsigned long flags;
2448 int i, l, c;
2449 volatile unsigned char __iomem *v = via;
2450
2451 req->complete = 1;
2452 c = req->data[0];
2453 l = pmu_data_len[c][0];
2454 if (l >= 0 && req->nbytes != l + 1)
2455 return -EINVAL;
2456
2457 local_irq_save(flags);
2458 while (pmu_state != idle)
2459 pmu_poll();
2460
2461 while ((via[B] & TACK) == 0)
2462 ;
2463 polled_send_byte(v, c);
2464 if (l < 0) {
2465 l = req->nbytes - 1;
2466 polled_send_byte(v, l);
2467 }
2468 for (i = 1; i <= l; ++i)
2469 polled_send_byte(v, req->data[i]);
2470
2471 l = pmu_data_len[c][1];
2472 if (l < 0)
2473 l = polled_recv_byte(v);
2474 for (i = 0; i < l; ++i)
2475 req->reply[i + req->reply_len] = polled_recv_byte(v);
2476
2477 if (req->done)
2478 (*req->done)(req);
2479
2480 local_irq_restore(flags);
2481 return 0;
2482 }
2483
2484 /* N.B. This doesn't work on the 3400 */
2485 void pmu_blink(int n)
2486 {
2487 struct adb_request req;
2488
2489 memset(&req, 0, sizeof(req));
2490
2491 for (; n > 0; --n) {
2492 req.nbytes = 4;
2493 req.done = NULL;
2494 req.data[0] = 0xee;
2495 req.data[1] = 4;
2496 req.data[2] = 0;
2497 req.data[3] = 1;
2498 req.reply[0] = ADB_RET_OK;
2499 req.reply_len = 1;
2500 req.reply_expected = 0;
2501 pmu_polled_request(&req);
2502 mdelay(50);
2503 req.nbytes = 4;
2504 req.done = NULL;
2505 req.data[0] = 0xee;
2506 req.data[1] = 4;
2507 req.data[2] = 0;
2508 req.data[3] = 0;
2509 req.reply[0] = ADB_RET_OK;
2510 req.reply_len = 1;
2511 req.reply_expected = 0;
2512 pmu_polled_request(&req);
2513 mdelay(50);
2514 }
2515 mdelay(50);
2516 }
2517 #endif /* DEBUG_SLEEP */
2518
2519 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2520 int pmu_sys_suspended;
2521
2522 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2523 {
2524 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2525 return 0;
2526
2527 /* Suspend PMU event interrupts */\
2528 pmu_suspend();
2529 pmu_sys_suspended = 1;
2530
2531 #ifdef CONFIG_PMAC_BACKLIGHT
2532 /* Tell backlight code not to muck around with the chip anymore */
2533 pmu_backlight_set_sleep(1);
2534 #endif
2535
2536 return 0;
2537 }
2538
2539 static int pmu_sys_resume(struct sys_device *sysdev)
2540 {
2541 struct adb_request req;
2542
2543 if (!pmu_sys_suspended)
2544 return 0;
2545
2546 /* Tell PMU we are ready */
2547 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2548 pmu_wait_complete(&req);
2549
2550 #ifdef CONFIG_PMAC_BACKLIGHT
2551 /* Tell backlight code it can use the chip again */
2552 pmu_backlight_set_sleep(0);
2553 #endif
2554 /* Resume PMU event interrupts */
2555 pmu_resume();
2556 pmu_sys_suspended = 0;
2557
2558 return 0;
2559 }
2560
2561 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2562
2563 static struct sysdev_class pmu_sysclass = {
2564 .name = "pmu",
2565 };
2566
2567 static struct sys_device device_pmu = {
2568 .cls = &pmu_sysclass,
2569 };
2570
2571 static struct sysdev_driver driver_pmu = {
2572 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2573 .suspend = &pmu_sys_suspend,
2574 .resume = &pmu_sys_resume,
2575 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2576 };
2577
2578 static int __init init_pmu_sysfs(void)
2579 {
2580 int rc;
2581
2582 rc = sysdev_class_register(&pmu_sysclass);
2583 if (rc) {
2584 printk(KERN_ERR "Failed registering PMU sys class\n");
2585 return -ENODEV;
2586 }
2587 rc = sysdev_register(&device_pmu);
2588 if (rc) {
2589 printk(KERN_ERR "Failed registering PMU sys device\n");
2590 return -ENODEV;
2591 }
2592 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2593 if (rc) {
2594 printk(KERN_ERR "Failed registering PMU sys driver\n");
2595 return -ENODEV;
2596 }
2597 return 0;
2598 }
2599
2600 subsys_initcall(init_pmu_sysfs);
2601
2602 EXPORT_SYMBOL(pmu_request);
2603 EXPORT_SYMBOL(pmu_queue_request);
2604 EXPORT_SYMBOL(pmu_poll);
2605 EXPORT_SYMBOL(pmu_poll_adb);
2606 EXPORT_SYMBOL(pmu_wait_complete);
2607 EXPORT_SYMBOL(pmu_suspend);
2608 EXPORT_SYMBOL(pmu_resume);
2609 EXPORT_SYMBOL(pmu_unlock);
2610 #if defined(CONFIG_PPC32)
2611 EXPORT_SYMBOL(pmu_enable_irled);
2612 EXPORT_SYMBOL(pmu_battery_count);
2613 EXPORT_SYMBOL(pmu_batteries);
2614 EXPORT_SYMBOL(pmu_power_flags);
2615 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
Tomato firmware and modifications.