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[PATCH] powerpc: Remove device_node addrs/n_addr
[deliverable/linux.git] / drivers / macintosh / via-pmu.c
1 /*
2 * Device driver for the via-pmu on Apple Powermacs.
3 *
4 * The VIA (versatile interface adapter) interfaces to the PMU,
5 * a 6805 microprocessor core whose primary function is to control
6 * battery charging and system power on the PowerBook 3400 and 2400.
7 * The PMU also controls the ADB (Apple Desktop Bus) which connects
8 * to the keyboard and mouse, as well as the non-volatile RAM
9 * and the RTC (real time clock) chip.
10 *
11 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
12 * Copyright (C) 2001-2002 Benjamin Herrenschmidt
13 *
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 #ifdef CONFIG_PPC32
67 #include <asm/open_pic.h>
68 #endif
69
70 /* Some compile options */
71 #undef SUSPEND_USES_PMU
72 #define DEBUG_SLEEP
73 #undef HACKED_PCI_SAVE
74
75 /* Misc minor number allocated for /dev/pmu */
76 #define PMU_MINOR 154
77
78 /* How many iterations between battery polls */
79 #define BATTERY_POLLING_COUNT 2
80
81 static volatile unsigned char __iomem *via;
82
83 /* VIA registers - spaced 0x200 bytes apart */
84 #define RS 0x200 /* skip between registers */
85 #define B 0 /* B-side data */
86 #define A RS /* A-side data */
87 #define DIRB (2*RS) /* B-side direction (1=output) */
88 #define DIRA (3*RS) /* A-side direction (1=output) */
89 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
90 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
91 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
92 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
93 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
94 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
95 #define SR (10*RS) /* Shift register */
96 #define ACR (11*RS) /* Auxiliary control register */
97 #define PCR (12*RS) /* Peripheral control register */
98 #define IFR (13*RS) /* Interrupt flag register */
99 #define IER (14*RS) /* Interrupt enable register */
100 #define ANH (15*RS) /* A-side data, no handshake */
101
102 /* Bits in B data register: both active low */
103 #define TACK 0x08 /* Transfer acknowledge (input) */
104 #define TREQ 0x10 /* Transfer request (output) */
105
106 /* Bits in ACR */
107 #define SR_CTRL 0x1c /* Shift register control bits */
108 #define SR_EXT 0x0c /* Shift on external clock */
109 #define SR_OUT 0x10 /* Shift out if 1 */
110
111 /* Bits in IFR and IER */
112 #define IER_SET 0x80 /* set bits in IER */
113 #define IER_CLR 0 /* clear bits in IER */
114 #define SR_INT 0x04 /* Shift register full/empty */
115 #define CB2_INT 0x08
116 #define CB1_INT 0x10 /* transition on CB1 input */
117
118 static volatile enum pmu_state {
119 idle,
120 sending,
121 intack,
122 reading,
123 reading_intr,
124 locked,
125 } pmu_state;
126
127 static volatile enum int_data_state {
128 int_data_empty,
129 int_data_fill,
130 int_data_ready,
131 int_data_flush
132 } int_data_state[2] = { int_data_empty, int_data_empty };
133
134 static struct adb_request *current_req;
135 static struct adb_request *last_req;
136 static struct adb_request *req_awaiting_reply;
137 static unsigned char interrupt_data[2][32];
138 static int interrupt_data_len[2];
139 static int int_data_last;
140 static unsigned char *reply_ptr;
141 static int data_index;
142 static int data_len;
143 static volatile int adb_int_pending;
144 static volatile int disable_poll;
145 static struct adb_request bright_req_1, bright_req_2;
146 static struct device_node *vias;
147 static int pmu_kind = PMU_UNKNOWN;
148 static int pmu_fully_inited = 0;
149 static int pmu_has_adb;
150 static struct device_node *gpio_node;
151 static unsigned char __iomem *gpio_reg = NULL;
152 static int gpio_irq = -1;
153 static int gpio_irq_enabled = -1;
154 static volatile int pmu_suspended = 0;
155 static spinlock_t pmu_lock;
156 static u8 pmu_intr_mask;
157 static int pmu_version;
158 static int drop_interrupts;
159 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
160 static int option_lid_wakeup = 1;
161 static int sleep_in_progress;
162 #endif /* CONFIG_PM && CONFIG_PPC32 */
163 static unsigned long async_req_locks;
164 static unsigned int pmu_irq_stats[11];
165
166 static struct proc_dir_entry *proc_pmu_root;
167 static struct proc_dir_entry *proc_pmu_info;
168 static struct proc_dir_entry *proc_pmu_irqstats;
169 static struct proc_dir_entry *proc_pmu_options;
170 static int option_server_mode;
171
172 int pmu_battery_count;
173 int pmu_cur_battery;
174 unsigned int pmu_power_flags;
175 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
176 static int query_batt_timer = BATTERY_POLLING_COUNT;
177 static struct adb_request batt_req;
178 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
179
180 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
181 extern int disable_kernel_backlight;
182 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
183
184 int __fake_sleep;
185 int asleep;
186 struct notifier_block *sleep_notifier_list;
187
188 #ifdef CONFIG_ADB
189 static int adb_dev_map = 0;
190 static int pmu_adb_flags;
191
192 static int pmu_probe(void);
193 static int pmu_init(void);
194 static int pmu_send_request(struct adb_request *req, int sync);
195 static int pmu_adb_autopoll(int devs);
196 static int pmu_adb_reset_bus(void);
197 #endif /* CONFIG_ADB */
198
199 static int init_pmu(void);
200 static int pmu_queue_request(struct adb_request *req);
201 static void pmu_start(void);
202 static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
203 static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
204 static int proc_get_info(char *page, char **start, off_t off,
205 int count, int *eof, void *data);
206 static int proc_get_irqstats(char *page, char **start, off_t off,
207 int count, int *eof, void *data);
208 #ifdef CONFIG_PMAC_BACKLIGHT
209 static int pmu_set_backlight_level(int level, void* data);
210 static int pmu_set_backlight_enable(int on, int level, void* data);
211 #endif /* CONFIG_PMAC_BACKLIGHT */
212 static void pmu_pass_intr(unsigned char *data, int len);
213 static int proc_get_batt(char *page, char **start, off_t off,
214 int count, int *eof, void *data);
215 static int proc_read_options(char *page, char **start, off_t off,
216 int count, int *eof, void *data);
217 static int proc_write_options(struct file *file, const char __user *buffer,
218 unsigned long count, void *data);
219
220 #ifdef CONFIG_ADB
221 struct adb_driver via_pmu_driver = {
222 "PMU",
223 pmu_probe,
224 pmu_init,
225 pmu_send_request,
226 pmu_adb_autopoll,
227 pmu_poll_adb,
228 pmu_adb_reset_bus
229 };
230 #endif /* CONFIG_ADB */
231
232 extern void low_sleep_handler(void);
233 extern void enable_kernel_altivec(void);
234 extern void enable_kernel_fp(void);
235
236 #ifdef DEBUG_SLEEP
237 int pmu_polled_request(struct adb_request *req);
238 int pmu_wink(struct adb_request *req);
239 #endif
240
241 /*
242 * This table indicates for each PMU opcode:
243 * - the number of data bytes to be sent with the command, or -1
244 * if a length byte should be sent,
245 * - the number of response bytes which the PMU will return, or
246 * -1 if it will send a length byte.
247 */
248 static const s8 pmu_data_len[256][2] = {
249 /* 0 1 2 3 4 5 6 7 */
250 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
251 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
252 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
253 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
254 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
255 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
256 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
257 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
258 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
259 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
260 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
261 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
262 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
263 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
264 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
265 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
266 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
267 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
268 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
269 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
270 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
271 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
272 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
273 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
274 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
275 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
276 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
277 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
278 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
279 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
280 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
281 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
282 };
283
284 static char *pbook_type[] = {
285 "Unknown PowerBook",
286 "PowerBook 2400/3400/3500(G3)",
287 "PowerBook G3 Series",
288 "1999 PowerBook G3",
289 "Core99"
290 };
291
292 #ifdef CONFIG_PMAC_BACKLIGHT
293 static struct backlight_controller pmu_backlight_controller = {
294 pmu_set_backlight_enable,
295 pmu_set_backlight_level
296 };
297 #endif /* CONFIG_PMAC_BACKLIGHT */
298
299 int __init find_via_pmu(void)
300 {
301 u64 taddr;
302 u32 *reg;
303
304 if (via != 0)
305 return 1;
306 vias = of_find_node_by_name(NULL, "via-pmu");
307 if (vias == NULL)
308 return 0;
309
310 reg = (u32 *)get_property(vias, "reg", NULL);
311 if (reg == NULL) {
312 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
313 goto fail;
314 }
315 taddr = of_translate_address(vias, reg);
316 if (taddr == OF_BAD_ADDR) {
317 printk(KERN_ERR "via-pmu: Can't translate address !\n");
318 goto fail;
319 }
320
321 spin_lock_init(&pmu_lock);
322
323 pmu_has_adb = 1;
324
325 pmu_intr_mask = PMU_INT_PCEJECT |
326 PMU_INT_SNDBRT |
327 PMU_INT_ADB |
328 PMU_INT_TICK;
329
330 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
331 || device_is_compatible(vias->parent, "ohare")))
332 pmu_kind = PMU_OHARE_BASED;
333 else if (device_is_compatible(vias->parent, "paddington"))
334 pmu_kind = PMU_PADDINGTON_BASED;
335 else if (device_is_compatible(vias->parent, "heathrow"))
336 pmu_kind = PMU_HEATHROW_BASED;
337 else if (device_is_compatible(vias->parent, "Keylargo")
338 || device_is_compatible(vias->parent, "K2-Keylargo")) {
339 struct device_node *gpiop;
340 u64 gaddr = OF_BAD_ADDR;
341
342 pmu_kind = PMU_KEYLARGO_BASED;
343 pmu_has_adb = (find_type_devices("adb") != NULL);
344 pmu_intr_mask = PMU_INT_PCEJECT |
345 PMU_INT_SNDBRT |
346 PMU_INT_ADB |
347 PMU_INT_TICK |
348 PMU_INT_ENVIRONMENT;
349
350 gpiop = of_find_node_by_name(NULL, "gpio");
351 if (gpiop) {
352 reg = (u32 *)get_property(gpiop, "reg", NULL);
353 if (reg)
354 gaddr = of_translate_address(gpiop, reg);
355 if (gaddr != OF_BAD_ADDR)
356 gpio_reg = ioremap(gaddr, 0x10);
357 }
358 if (gpio_reg == NULL)
359 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
360 } else
361 pmu_kind = PMU_UNKNOWN;
362
363 via = ioremap(taddr, 0x2000);
364 if (via == NULL) {
365 printk(KERN_ERR "via-pmu: Can't map address !\n");
366 goto fail;
367 }
368
369 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
370 out_8(&via[IFR], 0x7f); /* clear IFR */
371
372 pmu_state = idle;
373
374 if (!init_pmu()) {
375 via = NULL;
376 return 0;
377 }
378
379 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
380 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
381
382 sys_ctrler = SYS_CTRLER_PMU;
383
384 return 1;
385 fail:
386 of_node_put(vias);
387 vias = NULL;
388 return 0;
389 }
390
391 #ifdef CONFIG_ADB
392 static int pmu_probe(void)
393 {
394 return vias == NULL? -ENODEV: 0;
395 }
396
397 static int __init pmu_init(void)
398 {
399 if (vias == NULL)
400 return -ENODEV;
401 return 0;
402 }
403 #endif /* CONFIG_ADB */
404
405 /*
406 * We can't wait until pmu_init gets called, that happens too late.
407 * It happens after IDE and SCSI initialization, which can take a few
408 * seconds, and by that time the PMU could have given up on us and
409 * turned us off.
410 * Thus this is called with arch_initcall rather than device_initcall.
411 */
412 static int __init via_pmu_start(void)
413 {
414 if (vias == NULL)
415 return -ENODEV;
416
417 bright_req_1.complete = 1;
418 bright_req_2.complete = 1;
419 batt_req.complete = 1;
420
421 #ifndef CONFIG_PPC_MERGE
422 if (pmu_kind == PMU_KEYLARGO_BASED)
423 openpic_set_irq_priority(vias->intrs[0].line,
424 OPENPIC_PRIORITY_DEFAULT + 1);
425 #endif
426
427 if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU",
428 (void *)0)) {
429 printk(KERN_ERR "VIA-PMU: can't get irq %d\n",
430 vias->intrs[0].line);
431 return -EAGAIN;
432 }
433
434 if (pmu_kind == PMU_KEYLARGO_BASED) {
435 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
436 if (gpio_node == NULL)
437 gpio_node = of_find_node_by_name(NULL,
438 "pmu-interrupt");
439 if (gpio_node && gpio_node->n_intrs > 0)
440 gpio_irq = gpio_node->intrs[0].line;
441
442 if (gpio_irq != -1) {
443 if (request_irq(gpio_irq, gpio1_interrupt, 0,
444 "GPIO1 ADB", (void *)0))
445 printk(KERN_ERR "pmu: can't get irq %d"
446 " (GPIO1)\n", gpio_irq);
447 else
448 gpio_irq_enabled = 1;
449 }
450 }
451
452 /* Enable interrupts */
453 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
454
455 pmu_fully_inited = 1;
456
457 /* Make sure PMU settle down before continuing. This is _very_ important
458 * since the IDE probe may shut interrupts down for quite a bit of time. If
459 * a PMU communication is pending while this happens, the PMU may timeout
460 * Not that on Core99 machines, the PMU keeps sending us environement
461 * messages, we should find a way to either fix IDE or make it call
462 * pmu_suspend() before masking interrupts. This can also happens while
463 * scolling with some fbdevs.
464 */
465 do {
466 pmu_poll();
467 } while (pmu_state != idle);
468
469 return 0;
470 }
471
472 arch_initcall(via_pmu_start);
473
474 /*
475 * This has to be done after pci_init, which is a subsys_initcall.
476 */
477 static int __init via_pmu_dev_init(void)
478 {
479 if (vias == NULL)
480 return -ENODEV;
481
482 #ifdef CONFIG_PMAC_BACKLIGHT
483 /* Enable backlight */
484 register_backlight_controller(&pmu_backlight_controller, NULL, "pmu");
485 #endif /* CONFIG_PMAC_BACKLIGHT */
486
487 #ifdef CONFIG_PPC32
488 if (machine_is_compatible("AAPL,3400/2400") ||
489 machine_is_compatible("AAPL,3500")) {
490 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
491 NULL, PMAC_MB_INFO_MODEL, 0);
492 pmu_battery_count = 1;
493 if (mb == PMAC_TYPE_COMET)
494 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
495 else
496 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
497 } else if (machine_is_compatible("AAPL,PowerBook1998") ||
498 machine_is_compatible("PowerBook1,1")) {
499 pmu_battery_count = 2;
500 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
501 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
502 } else {
503 struct device_node* prim = find_devices("power-mgt");
504 u32 *prim_info = NULL;
505 if (prim)
506 prim_info = (u32 *)get_property(prim, "prim-info", NULL);
507 if (prim_info) {
508 /* Other stuffs here yet unknown */
509 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
510 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
511 if (pmu_battery_count > 1)
512 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
513 }
514 }
515 #endif /* CONFIG_PPC32 */
516
517 /* Create /proc/pmu */
518 proc_pmu_root = proc_mkdir("pmu", NULL);
519 if (proc_pmu_root) {
520 long i;
521
522 for (i=0; i<pmu_battery_count; i++) {
523 char title[16];
524 sprintf(title, "battery_%ld", i);
525 proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
526 proc_get_batt, (void *)i);
527 }
528
529 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
530 proc_get_info, NULL);
531 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
532 proc_get_irqstats, NULL);
533 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
534 if (proc_pmu_options) {
535 proc_pmu_options->nlink = 1;
536 proc_pmu_options->read_proc = proc_read_options;
537 proc_pmu_options->write_proc = proc_write_options;
538 }
539 }
540 return 0;
541 }
542
543 device_initcall(via_pmu_dev_init);
544
545 static int
546 init_pmu(void)
547 {
548 int timeout;
549 struct adb_request req;
550
551 out_8(&via[B], via[B] | TREQ); /* negate TREQ */
552 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */
553
554 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
555 timeout = 100000;
556 while (!req.complete) {
557 if (--timeout < 0) {
558 printk(KERN_ERR "init_pmu: no response from PMU\n");
559 return 0;
560 }
561 udelay(10);
562 pmu_poll();
563 }
564
565 /* ack all pending interrupts */
566 timeout = 100000;
567 interrupt_data[0][0] = 1;
568 while (interrupt_data[0][0] || pmu_state != idle) {
569 if (--timeout < 0) {
570 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
571 return 0;
572 }
573 if (pmu_state == idle)
574 adb_int_pending = 1;
575 via_pmu_interrupt(0, NULL, NULL);
576 udelay(10);
577 }
578
579 /* Tell PMU we are ready. */
580 if (pmu_kind == PMU_KEYLARGO_BASED) {
581 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
582 while (!req.complete)
583 pmu_poll();
584 }
585
586 /* Read PMU version */
587 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
588 pmu_wait_complete(&req);
589 if (req.reply_len > 0)
590 pmu_version = req.reply[0];
591
592 /* Read server mode setting */
593 if (pmu_kind == PMU_KEYLARGO_BASED) {
594 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
595 PMU_PWR_GET_POWERUP_EVENTS);
596 pmu_wait_complete(&req);
597 if (req.reply_len == 2) {
598 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
599 option_server_mode = 1;
600 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
601 option_server_mode ? "enabled" : "disabled");
602 }
603 }
604 return 1;
605 }
606
607 int
608 pmu_get_model(void)
609 {
610 return pmu_kind;
611 }
612
613 static void pmu_set_server_mode(int server_mode)
614 {
615 struct adb_request req;
616
617 if (pmu_kind != PMU_KEYLARGO_BASED)
618 return;
619
620 option_server_mode = server_mode;
621 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
622 pmu_wait_complete(&req);
623 if (req.reply_len < 2)
624 return;
625 if (server_mode)
626 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
627 PMU_PWR_SET_POWERUP_EVENTS,
628 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
629 else
630 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
631 PMU_PWR_CLR_POWERUP_EVENTS,
632 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
633 pmu_wait_complete(&req);
634 }
635
636 /* This new version of the code for 2400/3400/3500 powerbooks
637 * is inspired from the implementation in gkrellm-pmu
638 */
639 static void
640 done_battery_state_ohare(struct adb_request* req)
641 {
642 /* format:
643 * [0] : flags
644 * 0x01 : AC indicator
645 * 0x02 : charging
646 * 0x04 : battery exist
647 * 0x08 :
648 * 0x10 :
649 * 0x20 : full charged
650 * 0x40 : pcharge reset
651 * 0x80 : battery exist
652 *
653 * [1][2] : battery voltage
654 * [3] : CPU temperature
655 * [4] : battery temperature
656 * [5] : current
657 * [6][7] : pcharge
658 * --tkoba
659 */
660 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
661 long pcharge, charge, vb, vmax, lmax;
662 long vmax_charging, vmax_charged;
663 long amperage, voltage, time, max;
664 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
665 NULL, PMAC_MB_INFO_MODEL, 0);
666
667 if (req->reply[0] & 0x01)
668 pmu_power_flags |= PMU_PWR_AC_PRESENT;
669 else
670 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
671
672 if (mb == PMAC_TYPE_COMET) {
673 vmax_charged = 189;
674 vmax_charging = 213;
675 lmax = 6500;
676 } else {
677 vmax_charged = 330;
678 vmax_charging = 330;
679 lmax = 6500;
680 }
681 vmax = vmax_charged;
682
683 /* If battery installed */
684 if (req->reply[0] & 0x04) {
685 bat_flags |= PMU_BATT_PRESENT;
686 if (req->reply[0] & 0x02)
687 bat_flags |= PMU_BATT_CHARGING;
688 vb = (req->reply[1] << 8) | req->reply[2];
689 voltage = (vb * 265 + 72665) / 10;
690 amperage = req->reply[5];
691 if ((req->reply[0] & 0x01) == 0) {
692 if (amperage > 200)
693 vb += ((amperage - 200) * 15)/100;
694 } else if (req->reply[0] & 0x02) {
695 vb = (vb * 97) / 100;
696 vmax = vmax_charging;
697 }
698 charge = (100 * vb) / vmax;
699 if (req->reply[0] & 0x40) {
700 pcharge = (req->reply[6] << 8) + req->reply[7];
701 if (pcharge > lmax)
702 pcharge = lmax;
703 pcharge *= 100;
704 pcharge = 100 - pcharge / lmax;
705 if (pcharge < charge)
706 charge = pcharge;
707 }
708 if (amperage > 0)
709 time = (charge * 16440) / amperage;
710 else
711 time = 0;
712 max = 100;
713 amperage = -amperage;
714 } else
715 charge = max = amperage = voltage = time = 0;
716
717 pmu_batteries[pmu_cur_battery].flags = bat_flags;
718 pmu_batteries[pmu_cur_battery].charge = charge;
719 pmu_batteries[pmu_cur_battery].max_charge = max;
720 pmu_batteries[pmu_cur_battery].amperage = amperage;
721 pmu_batteries[pmu_cur_battery].voltage = voltage;
722 pmu_batteries[pmu_cur_battery].time_remaining = time;
723
724 clear_bit(0, &async_req_locks);
725 }
726
727 static void
728 done_battery_state_smart(struct adb_request* req)
729 {
730 /* format:
731 * [0] : format of this structure (known: 3,4,5)
732 * [1] : flags
733 *
734 * format 3 & 4:
735 *
736 * [2] : charge
737 * [3] : max charge
738 * [4] : current
739 * [5] : voltage
740 *
741 * format 5:
742 *
743 * [2][3] : charge
744 * [4][5] : max charge
745 * [6][7] : current
746 * [8][9] : voltage
747 */
748
749 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
750 int amperage;
751 unsigned int capa, max, voltage;
752
753 if (req->reply[1] & 0x01)
754 pmu_power_flags |= PMU_PWR_AC_PRESENT;
755 else
756 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
757
758
759 capa = max = amperage = voltage = 0;
760
761 if (req->reply[1] & 0x04) {
762 bat_flags |= PMU_BATT_PRESENT;
763 switch(req->reply[0]) {
764 case 3:
765 case 4: capa = req->reply[2];
766 max = req->reply[3];
767 amperage = *((signed char *)&req->reply[4]);
768 voltage = req->reply[5];
769 break;
770 case 5: capa = (req->reply[2] << 8) | req->reply[3];
771 max = (req->reply[4] << 8) | req->reply[5];
772 amperage = *((signed short *)&req->reply[6]);
773 voltage = (req->reply[8] << 8) | req->reply[9];
774 break;
775 default:
776 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
777 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
778 break;
779 }
780 }
781
782 if ((req->reply[1] & 0x01) && (amperage > 0))
783 bat_flags |= PMU_BATT_CHARGING;
784
785 pmu_batteries[pmu_cur_battery].flags = bat_flags;
786 pmu_batteries[pmu_cur_battery].charge = capa;
787 pmu_batteries[pmu_cur_battery].max_charge = max;
788 pmu_batteries[pmu_cur_battery].amperage = amperage;
789 pmu_batteries[pmu_cur_battery].voltage = voltage;
790 if (amperage) {
791 if ((req->reply[1] & 0x01) && (amperage > 0))
792 pmu_batteries[pmu_cur_battery].time_remaining
793 = ((max-capa) * 3600) / amperage;
794 else
795 pmu_batteries[pmu_cur_battery].time_remaining
796 = (capa * 3600) / (-amperage);
797 } else
798 pmu_batteries[pmu_cur_battery].time_remaining = 0;
799
800 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
801
802 clear_bit(0, &async_req_locks);
803 }
804
805 static void
806 query_battery_state(void)
807 {
808 if (test_and_set_bit(0, &async_req_locks))
809 return;
810 if (pmu_kind == PMU_OHARE_BASED)
811 pmu_request(&batt_req, done_battery_state_ohare,
812 1, PMU_BATTERY_STATE);
813 else
814 pmu_request(&batt_req, done_battery_state_smart,
815 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
816 }
817
818 static int
819 proc_get_info(char *page, char **start, off_t off,
820 int count, int *eof, void *data)
821 {
822 char* p = page;
823
824 p += sprintf(p, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
825 p += sprintf(p, "PMU firmware version : %02x\n", pmu_version);
826 p += sprintf(p, "AC Power : %d\n",
827 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0));
828 p += sprintf(p, "Battery count : %d\n", pmu_battery_count);
829
830 return p - page;
831 }
832
833 static int
834 proc_get_irqstats(char *page, char **start, off_t off,
835 int count, int *eof, void *data)
836 {
837 int i;
838 char* p = page;
839 static const char *irq_names[] = {
840 "Total CB1 triggered events",
841 "Total GPIO1 triggered events",
842 "PC-Card eject button",
843 "Sound/Brightness button",
844 "ADB message",
845 "Battery state change",
846 "Environment interrupt",
847 "Tick timer",
848 "Ghost interrupt (zero len)",
849 "Empty interrupt (empty mask)",
850 "Max irqs in a row"
851 };
852
853 for (i=0; i<11; i++) {
854 p += sprintf(p, " %2u: %10u (%s)\n",
855 i, pmu_irq_stats[i], irq_names[i]);
856 }
857 return p - page;
858 }
859
860 static int
861 proc_get_batt(char *page, char **start, off_t off,
862 int count, int *eof, void *data)
863 {
864 long batnum = (long)data;
865 char *p = page;
866
867 p += sprintf(p, "\n");
868 p += sprintf(p, "flags : %08x\n",
869 pmu_batteries[batnum].flags);
870 p += sprintf(p, "charge : %d\n",
871 pmu_batteries[batnum].charge);
872 p += sprintf(p, "max_charge : %d\n",
873 pmu_batteries[batnum].max_charge);
874 p += sprintf(p, "current : %d\n",
875 pmu_batteries[batnum].amperage);
876 p += sprintf(p, "voltage : %d\n",
877 pmu_batteries[batnum].voltage);
878 p += sprintf(p, "time rem. : %d\n",
879 pmu_batteries[batnum].time_remaining);
880
881 return p - page;
882 }
883
884 static int
885 proc_read_options(char *page, char **start, off_t off,
886 int count, int *eof, void *data)
887 {
888 char *p = page;
889
890 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
891 if (pmu_kind == PMU_KEYLARGO_BASED &&
892 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
893 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
894 #endif
895 if (pmu_kind == PMU_KEYLARGO_BASED)
896 p += sprintf(p, "server_mode=%d\n", option_server_mode);
897
898 return p - page;
899 }
900
901 static int
902 proc_write_options(struct file *file, const char __user *buffer,
903 unsigned long count, void *data)
904 {
905 char tmp[33];
906 char *label, *val;
907 unsigned long fcount = count;
908
909 if (!count)
910 return -EINVAL;
911 if (count > 32)
912 count = 32;
913 if (copy_from_user(tmp, buffer, count))
914 return -EFAULT;
915 tmp[count] = 0;
916
917 label = tmp;
918 while(*label == ' ')
919 label++;
920 val = label;
921 while(*val && (*val != '=')) {
922 if (*val == ' ')
923 *val = 0;
924 val++;
925 }
926 if ((*val) == 0)
927 return -EINVAL;
928 *(val++) = 0;
929 while(*val == ' ')
930 val++;
931 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
932 if (pmu_kind == PMU_KEYLARGO_BASED &&
933 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
934 if (!strcmp(label, "lid_wakeup"))
935 option_lid_wakeup = ((*val) == '1');
936 #endif
937 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
938 int new_value;
939 new_value = ((*val) == '1');
940 if (new_value != option_server_mode)
941 pmu_set_server_mode(new_value);
942 }
943 return fcount;
944 }
945
946 #ifdef CONFIG_ADB
947 /* Send an ADB command */
948 static int
949 pmu_send_request(struct adb_request *req, int sync)
950 {
951 int i, ret;
952
953 if ((vias == NULL) || (!pmu_fully_inited)) {
954 req->complete = 1;
955 return -ENXIO;
956 }
957
958 ret = -EINVAL;
959
960 switch (req->data[0]) {
961 case PMU_PACKET:
962 for (i = 0; i < req->nbytes - 1; ++i)
963 req->data[i] = req->data[i+1];
964 --req->nbytes;
965 if (pmu_data_len[req->data[0]][1] != 0) {
966 req->reply[0] = ADB_RET_OK;
967 req->reply_len = 1;
968 } else
969 req->reply_len = 0;
970 ret = pmu_queue_request(req);
971 break;
972 case CUDA_PACKET:
973 switch (req->data[1]) {
974 case CUDA_GET_TIME:
975 if (req->nbytes != 2)
976 break;
977 req->data[0] = PMU_READ_RTC;
978 req->nbytes = 1;
979 req->reply_len = 3;
980 req->reply[0] = CUDA_PACKET;
981 req->reply[1] = 0;
982 req->reply[2] = CUDA_GET_TIME;
983 ret = pmu_queue_request(req);
984 break;
985 case CUDA_SET_TIME:
986 if (req->nbytes != 6)
987 break;
988 req->data[0] = PMU_SET_RTC;
989 req->nbytes = 5;
990 for (i = 1; i <= 4; ++i)
991 req->data[i] = req->data[i+1];
992 req->reply_len = 3;
993 req->reply[0] = CUDA_PACKET;
994 req->reply[1] = 0;
995 req->reply[2] = CUDA_SET_TIME;
996 ret = pmu_queue_request(req);
997 break;
998 }
999 break;
1000 case ADB_PACKET:
1001 if (!pmu_has_adb)
1002 return -ENXIO;
1003 for (i = req->nbytes - 1; i > 1; --i)
1004 req->data[i+2] = req->data[i];
1005 req->data[3] = req->nbytes - 2;
1006 req->data[2] = pmu_adb_flags;
1007 /*req->data[1] = req->data[1];*/
1008 req->data[0] = PMU_ADB_CMD;
1009 req->nbytes += 2;
1010 req->reply_expected = 1;
1011 req->reply_len = 0;
1012 ret = pmu_queue_request(req);
1013 break;
1014 }
1015 if (ret) {
1016 req->complete = 1;
1017 return ret;
1018 }
1019
1020 if (sync)
1021 while (!req->complete)
1022 pmu_poll();
1023
1024 return 0;
1025 }
1026
1027 /* Enable/disable autopolling */
1028 static int
1029 pmu_adb_autopoll(int devs)
1030 {
1031 struct adb_request req;
1032
1033 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1034 return -ENXIO;
1035
1036 if (devs) {
1037 adb_dev_map = devs;
1038 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1039 adb_dev_map >> 8, adb_dev_map);
1040 pmu_adb_flags = 2;
1041 } else {
1042 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1043 pmu_adb_flags = 0;
1044 }
1045 while (!req.complete)
1046 pmu_poll();
1047 return 0;
1048 }
1049
1050 /* Reset the ADB bus */
1051 static int
1052 pmu_adb_reset_bus(void)
1053 {
1054 struct adb_request req;
1055 int save_autopoll = adb_dev_map;
1056
1057 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1058 return -ENXIO;
1059
1060 /* anyone got a better idea?? */
1061 pmu_adb_autopoll(0);
1062
1063 req.nbytes = 5;
1064 req.done = NULL;
1065 req.data[0] = PMU_ADB_CMD;
1066 req.data[1] = 0;
1067 req.data[2] = ADB_BUSRESET;
1068 req.data[3] = 0;
1069 req.data[4] = 0;
1070 req.reply_len = 0;
1071 req.reply_expected = 1;
1072 if (pmu_queue_request(&req) != 0) {
1073 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1074 return -EIO;
1075 }
1076 pmu_wait_complete(&req);
1077
1078 if (save_autopoll != 0)
1079 pmu_adb_autopoll(save_autopoll);
1080
1081 return 0;
1082 }
1083 #endif /* CONFIG_ADB */
1084
1085 /* Construct and send a pmu request */
1086 int
1087 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1088 int nbytes, ...)
1089 {
1090 va_list list;
1091 int i;
1092
1093 if (vias == NULL)
1094 return -ENXIO;
1095
1096 if (nbytes < 0 || nbytes > 32) {
1097 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1098 req->complete = 1;
1099 return -EINVAL;
1100 }
1101 req->nbytes = nbytes;
1102 req->done = done;
1103 va_start(list, nbytes);
1104 for (i = 0; i < nbytes; ++i)
1105 req->data[i] = va_arg(list, int);
1106 va_end(list);
1107 req->reply_len = 0;
1108 req->reply_expected = 0;
1109 return pmu_queue_request(req);
1110 }
1111
1112 int
1113 pmu_queue_request(struct adb_request *req)
1114 {
1115 unsigned long flags;
1116 int nsend;
1117
1118 if (via == NULL) {
1119 req->complete = 1;
1120 return -ENXIO;
1121 }
1122 if (req->nbytes <= 0) {
1123 req->complete = 1;
1124 return 0;
1125 }
1126 nsend = pmu_data_len[req->data[0]][0];
1127 if (nsend >= 0 && req->nbytes != nsend + 1) {
1128 req->complete = 1;
1129 return -EINVAL;
1130 }
1131
1132 req->next = NULL;
1133 req->sent = 0;
1134 req->complete = 0;
1135
1136 spin_lock_irqsave(&pmu_lock, flags);
1137 if (current_req != 0) {
1138 last_req->next = req;
1139 last_req = req;
1140 } else {
1141 current_req = req;
1142 last_req = req;
1143 if (pmu_state == idle)
1144 pmu_start();
1145 }
1146 spin_unlock_irqrestore(&pmu_lock, flags);
1147
1148 return 0;
1149 }
1150
1151 static inline void
1152 wait_for_ack(void)
1153 {
1154 /* Sightly increased the delay, I had one occurrence of the message
1155 * reported
1156 */
1157 int timeout = 4000;
1158 while ((in_8(&via[B]) & TACK) == 0) {
1159 if (--timeout < 0) {
1160 printk(KERN_ERR "PMU not responding (!ack)\n");
1161 return;
1162 }
1163 udelay(10);
1164 }
1165 }
1166
1167 /* New PMU seems to be very sensitive to those timings, so we make sure
1168 * PCI is flushed immediately */
1169 static inline void
1170 send_byte(int x)
1171 {
1172 volatile unsigned char __iomem *v = via;
1173
1174 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1175 out_8(&v[SR], x);
1176 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
1177 (void)in_8(&v[B]);
1178 }
1179
1180 static inline void
1181 recv_byte(void)
1182 {
1183 volatile unsigned char __iomem *v = via;
1184
1185 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1186 in_8(&v[SR]); /* resets SR */
1187 out_8(&v[B], in_8(&v[B]) & ~TREQ);
1188 (void)in_8(&v[B]);
1189 }
1190
1191 static inline void
1192 pmu_done(struct adb_request *req)
1193 {
1194 void (*done)(struct adb_request *) = req->done;
1195 mb();
1196 req->complete = 1;
1197 /* Here, we assume that if the request has a done member, the
1198 * struct request will survive to setting req->complete to 1
1199 */
1200 if (done)
1201 (*done)(req);
1202 }
1203
1204 static void
1205 pmu_start(void)
1206 {
1207 struct adb_request *req;
1208
1209 /* assert pmu_state == idle */
1210 /* get the packet to send */
1211 req = current_req;
1212 if (req == 0 || pmu_state != idle
1213 || (/*req->reply_expected && */req_awaiting_reply))
1214 return;
1215
1216 pmu_state = sending;
1217 data_index = 1;
1218 data_len = pmu_data_len[req->data[0]][0];
1219
1220 /* Sounds safer to make sure ACK is high before writing. This helped
1221 * kill a problem with ADB and some iBooks
1222 */
1223 wait_for_ack();
1224 /* set the shift register to shift out and send a byte */
1225 send_byte(req->data[0]);
1226 }
1227
1228 void
1229 pmu_poll(void)
1230 {
1231 if (!via)
1232 return;
1233 if (disable_poll)
1234 return;
1235 via_pmu_interrupt(0, NULL, NULL);
1236 }
1237
1238 void
1239 pmu_poll_adb(void)
1240 {
1241 if (!via)
1242 return;
1243 if (disable_poll)
1244 return;
1245 /* Kicks ADB read when PMU is suspended */
1246 adb_int_pending = 1;
1247 do {
1248 via_pmu_interrupt(0, NULL, NULL);
1249 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1250 || req_awaiting_reply));
1251 }
1252
1253 void
1254 pmu_wait_complete(struct adb_request *req)
1255 {
1256 if (!via)
1257 return;
1258 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1259 via_pmu_interrupt(0, NULL, NULL);
1260 }
1261
1262 /* This function loops until the PMU is idle and prevents it from
1263 * anwsering to ADB interrupts. pmu_request can still be called.
1264 * This is done to avoid spurrious shutdowns when we know we'll have
1265 * interrupts switched off for a long time
1266 */
1267 void
1268 pmu_suspend(void)
1269 {
1270 unsigned long flags;
1271 #ifdef SUSPEND_USES_PMU
1272 struct adb_request *req;
1273 #endif
1274 if (!via)
1275 return;
1276
1277 spin_lock_irqsave(&pmu_lock, flags);
1278 pmu_suspended++;
1279 if (pmu_suspended > 1) {
1280 spin_unlock_irqrestore(&pmu_lock, flags);
1281 return;
1282 }
1283
1284 do {
1285 spin_unlock_irqrestore(&pmu_lock, flags);
1286 if (req_awaiting_reply)
1287 adb_int_pending = 1;
1288 via_pmu_interrupt(0, NULL, NULL);
1289 spin_lock_irqsave(&pmu_lock, flags);
1290 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1291 #ifdef SUSPEND_USES_PMU
1292 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1293 spin_unlock_irqrestore(&pmu_lock, flags);
1294 while(!req.complete)
1295 pmu_poll();
1296 #else /* SUSPEND_USES_PMU */
1297 if (gpio_irq >= 0)
1298 disable_irq_nosync(gpio_irq);
1299 out_8(&via[IER], CB1_INT | IER_CLR);
1300 spin_unlock_irqrestore(&pmu_lock, flags);
1301 #endif /* SUSPEND_USES_PMU */
1302 break;
1303 }
1304 } while (1);
1305 }
1306
1307 void
1308 pmu_resume(void)
1309 {
1310 unsigned long flags;
1311
1312 if (!via || (pmu_suspended < 1))
1313 return;
1314
1315 spin_lock_irqsave(&pmu_lock, flags);
1316 pmu_suspended--;
1317 if (pmu_suspended > 0) {
1318 spin_unlock_irqrestore(&pmu_lock, flags);
1319 return;
1320 }
1321 adb_int_pending = 1;
1322 #ifdef SUSPEND_USES_PMU
1323 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1324 spin_unlock_irqrestore(&pmu_lock, flags);
1325 while(!req.complete)
1326 pmu_poll();
1327 #else /* SUSPEND_USES_PMU */
1328 if (gpio_irq >= 0)
1329 enable_irq(gpio_irq);
1330 out_8(&via[IER], CB1_INT | IER_SET);
1331 spin_unlock_irqrestore(&pmu_lock, flags);
1332 pmu_poll();
1333 #endif /* SUSPEND_USES_PMU */
1334 }
1335
1336 /* Interrupt data could be the result data from an ADB cmd */
1337 static void
1338 pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs)
1339 {
1340 unsigned char ints, pirq;
1341 int i = 0;
1342
1343 asleep = 0;
1344 if (drop_interrupts || len < 1) {
1345 adb_int_pending = 0;
1346 pmu_irq_stats[8]++;
1347 return;
1348 }
1349
1350 /* Get PMU interrupt mask */
1351 ints = data[0];
1352
1353 /* Record zero interrupts for stats */
1354 if (ints == 0)
1355 pmu_irq_stats[9]++;
1356
1357 /* Hack to deal with ADB autopoll flag */
1358 if (ints & PMU_INT_ADB)
1359 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1360
1361 next:
1362
1363 if (ints == 0) {
1364 if (i > pmu_irq_stats[10])
1365 pmu_irq_stats[10] = i;
1366 return;
1367 }
1368
1369 for (pirq = 0; pirq < 8; pirq++)
1370 if (ints & (1 << pirq))
1371 break;
1372 pmu_irq_stats[pirq]++;
1373 i++;
1374 ints &= ~(1 << pirq);
1375
1376 /* Note: for some reason, we get an interrupt with len=1,
1377 * data[0]==0 after each normal ADB interrupt, at least
1378 * on the Pismo. Still investigating... --BenH
1379 */
1380 if ((1 << pirq) & PMU_INT_ADB) {
1381 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1382 struct adb_request *req = req_awaiting_reply;
1383 if (req == 0) {
1384 printk(KERN_ERR "PMU: extra ADB reply\n");
1385 return;
1386 }
1387 req_awaiting_reply = NULL;
1388 if (len <= 2)
1389 req->reply_len = 0;
1390 else {
1391 memcpy(req->reply, data + 1, len - 1);
1392 req->reply_len = len - 1;
1393 }
1394 pmu_done(req);
1395 } else {
1396 if (len == 4 && data[1] == 0x2c) {
1397 extern int xmon_wants_key, xmon_adb_keycode;
1398 if (xmon_wants_key) {
1399 xmon_adb_keycode = data[2];
1400 return;
1401 }
1402 }
1403 #ifdef CONFIG_ADB
1404 /*
1405 * XXX On the [23]400 the PMU gives us an up
1406 * event for keycodes 0x74 or 0x75 when the PC
1407 * card eject buttons are released, so we
1408 * ignore those events.
1409 */
1410 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1411 && data[1] == 0x2c && data[3] == 0xff
1412 && (data[2] & ~1) == 0xf4))
1413 adb_input(data+1, len-1, regs, 1);
1414 #endif /* CONFIG_ADB */
1415 }
1416 }
1417 /* Sound/brightness button pressed */
1418 else if ((1 << pirq) & PMU_INT_SNDBRT) {
1419 #ifdef CONFIG_PMAC_BACKLIGHT
1420 if (len == 3)
1421 #ifdef CONFIG_INPUT_ADBHID
1422 if (!disable_kernel_backlight)
1423 #endif /* CONFIG_INPUT_ADBHID */
1424 set_backlight_level(data[1] >> 4);
1425 #endif /* CONFIG_PMAC_BACKLIGHT */
1426 }
1427 /* Tick interrupt */
1428 else if ((1 << pirq) & PMU_INT_TICK) {
1429 /* Environement or tick interrupt, query batteries */
1430 if (pmu_battery_count) {
1431 if ((--query_batt_timer) == 0) {
1432 query_battery_state();
1433 query_batt_timer = BATTERY_POLLING_COUNT;
1434 }
1435 }
1436 }
1437 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1438 if (pmu_battery_count)
1439 query_battery_state();
1440 pmu_pass_intr(data, len);
1441 } else {
1442 pmu_pass_intr(data, len);
1443 }
1444 goto next;
1445 }
1446
1447 static struct adb_request*
1448 pmu_sr_intr(struct pt_regs *regs)
1449 {
1450 struct adb_request *req;
1451 int bite = 0;
1452
1453 if (via[B] & TREQ) {
1454 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1455 out_8(&via[IFR], SR_INT);
1456 return NULL;
1457 }
1458 /* The ack may not yet be low when we get the interrupt */
1459 while ((in_8(&via[B]) & TACK) != 0)
1460 ;
1461
1462 /* if reading grab the byte, and reset the interrupt */
1463 if (pmu_state == reading || pmu_state == reading_intr)
1464 bite = in_8(&via[SR]);
1465
1466 /* reset TREQ and wait for TACK to go high */
1467 out_8(&via[B], in_8(&via[B]) | TREQ);
1468 wait_for_ack();
1469
1470 switch (pmu_state) {
1471 case sending:
1472 req = current_req;
1473 if (data_len < 0) {
1474 data_len = req->nbytes - 1;
1475 send_byte(data_len);
1476 break;
1477 }
1478 if (data_index <= data_len) {
1479 send_byte(req->data[data_index++]);
1480 break;
1481 }
1482 req->sent = 1;
1483 data_len = pmu_data_len[req->data[0]][1];
1484 if (data_len == 0) {
1485 pmu_state = idle;
1486 current_req = req->next;
1487 if (req->reply_expected)
1488 req_awaiting_reply = req;
1489 else
1490 return req;
1491 } else {
1492 pmu_state = reading;
1493 data_index = 0;
1494 reply_ptr = req->reply + req->reply_len;
1495 recv_byte();
1496 }
1497 break;
1498
1499 case intack:
1500 data_index = 0;
1501 data_len = -1;
1502 pmu_state = reading_intr;
1503 reply_ptr = interrupt_data[int_data_last];
1504 recv_byte();
1505 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1506 enable_irq(gpio_irq);
1507 gpio_irq_enabled = 1;
1508 }
1509 break;
1510
1511 case reading:
1512 case reading_intr:
1513 if (data_len == -1) {
1514 data_len = bite;
1515 if (bite > 32)
1516 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1517 } else if (data_index < 32) {
1518 reply_ptr[data_index++] = bite;
1519 }
1520 if (data_index < data_len) {
1521 recv_byte();
1522 break;
1523 }
1524
1525 if (pmu_state == reading_intr) {
1526 pmu_state = idle;
1527 int_data_state[int_data_last] = int_data_ready;
1528 interrupt_data_len[int_data_last] = data_len;
1529 } else {
1530 req = current_req;
1531 /*
1532 * For PMU sleep and freq change requests, we lock the
1533 * PMU until it's explicitely unlocked. This avoids any
1534 * spurrious event polling getting in
1535 */
1536 current_req = req->next;
1537 req->reply_len += data_index;
1538 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1539 pmu_state = locked;
1540 else
1541 pmu_state = idle;
1542 return req;
1543 }
1544 break;
1545
1546 default:
1547 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1548 pmu_state);
1549 }
1550 return NULL;
1551 }
1552
1553 static irqreturn_t
1554 via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs)
1555 {
1556 unsigned long flags;
1557 int intr;
1558 int nloop = 0;
1559 int int_data = -1;
1560 struct adb_request *req = NULL;
1561 int handled = 0;
1562
1563 /* This is a bit brutal, we can probably do better */
1564 spin_lock_irqsave(&pmu_lock, flags);
1565 ++disable_poll;
1566
1567 for (;;) {
1568 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1569 if (intr == 0)
1570 break;
1571 handled = 1;
1572 if (++nloop > 1000) {
1573 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1574 "intr=%x, ier=%x pmu_state=%d\n",
1575 intr, in_8(&via[IER]), pmu_state);
1576 break;
1577 }
1578 out_8(&via[IFR], intr);
1579 if (intr & CB1_INT) {
1580 adb_int_pending = 1;
1581 pmu_irq_stats[0]++;
1582 }
1583 if (intr & SR_INT) {
1584 req = pmu_sr_intr(regs);
1585 if (req)
1586 break;
1587 }
1588 }
1589
1590 recheck:
1591 if (pmu_state == idle) {
1592 if (adb_int_pending) {
1593 if (int_data_state[0] == int_data_empty)
1594 int_data_last = 0;
1595 else if (int_data_state[1] == int_data_empty)
1596 int_data_last = 1;
1597 else
1598 goto no_free_slot;
1599 pmu_state = intack;
1600 int_data_state[int_data_last] = int_data_fill;
1601 /* Sounds safer to make sure ACK is high before writing.
1602 * This helped kill a problem with ADB and some iBooks
1603 */
1604 wait_for_ack();
1605 send_byte(PMU_INT_ACK);
1606 adb_int_pending = 0;
1607 } else if (current_req)
1608 pmu_start();
1609 }
1610 no_free_slot:
1611 /* Mark the oldest buffer for flushing */
1612 if (int_data_state[!int_data_last] == int_data_ready) {
1613 int_data_state[!int_data_last] = int_data_flush;
1614 int_data = !int_data_last;
1615 } else if (int_data_state[int_data_last] == int_data_ready) {
1616 int_data_state[int_data_last] = int_data_flush;
1617 int_data = int_data_last;
1618 }
1619 --disable_poll;
1620 spin_unlock_irqrestore(&pmu_lock, flags);
1621
1622 /* Deal with completed PMU requests outside of the lock */
1623 if (req) {
1624 pmu_done(req);
1625 req = NULL;
1626 }
1627
1628 /* Deal with interrupt datas outside of the lock */
1629 if (int_data >= 0) {
1630 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs);
1631 spin_lock_irqsave(&pmu_lock, flags);
1632 ++disable_poll;
1633 int_data_state[int_data] = int_data_empty;
1634 int_data = -1;
1635 goto recheck;
1636 }
1637
1638 return IRQ_RETVAL(handled);
1639 }
1640
1641 void
1642 pmu_unlock(void)
1643 {
1644 unsigned long flags;
1645
1646 spin_lock_irqsave(&pmu_lock, flags);
1647 if (pmu_state == locked)
1648 pmu_state = idle;
1649 adb_int_pending = 1;
1650 spin_unlock_irqrestore(&pmu_lock, flags);
1651 }
1652
1653
1654 static irqreturn_t
1655 gpio1_interrupt(int irq, void *arg, struct pt_regs *regs)
1656 {
1657 unsigned long flags;
1658
1659 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1660 spin_lock_irqsave(&pmu_lock, flags);
1661 if (gpio_irq_enabled > 0) {
1662 disable_irq_nosync(gpio_irq);
1663 gpio_irq_enabled = 0;
1664 }
1665 pmu_irq_stats[1]++;
1666 adb_int_pending = 1;
1667 spin_unlock_irqrestore(&pmu_lock, flags);
1668 via_pmu_interrupt(0, NULL, NULL);
1669 return IRQ_HANDLED;
1670 }
1671 return IRQ_NONE;
1672 }
1673
1674 #ifdef CONFIG_PMAC_BACKLIGHT
1675 static int backlight_to_bright[] = {
1676 0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e,
1677 0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e
1678 };
1679
1680 static int
1681 pmu_set_backlight_enable(int on, int level, void* data)
1682 {
1683 struct adb_request req;
1684
1685 if (vias == NULL)
1686 return -ENODEV;
1687
1688 if (on) {
1689 pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
1690 backlight_to_bright[level]);
1691 pmu_wait_complete(&req);
1692 }
1693 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1694 PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF));
1695 pmu_wait_complete(&req);
1696
1697 return 0;
1698 }
1699
1700 static void
1701 pmu_bright_complete(struct adb_request *req)
1702 {
1703 if (req == &bright_req_1)
1704 clear_bit(1, &async_req_locks);
1705 if (req == &bright_req_2)
1706 clear_bit(2, &async_req_locks);
1707 }
1708
1709 static int
1710 pmu_set_backlight_level(int level, void* data)
1711 {
1712 if (vias == NULL)
1713 return -ENODEV;
1714
1715 if (test_and_set_bit(1, &async_req_locks))
1716 return -EAGAIN;
1717 pmu_request(&bright_req_1, pmu_bright_complete, 2, PMU_BACKLIGHT_BRIGHT,
1718 backlight_to_bright[level]);
1719 if (test_and_set_bit(2, &async_req_locks))
1720 return -EAGAIN;
1721 pmu_request(&bright_req_2, pmu_bright_complete, 2, PMU_POWER_CTRL,
1722 PMU_POW_BACKLIGHT | (level > BACKLIGHT_OFF ?
1723 PMU_POW_ON : PMU_POW_OFF));
1724
1725 return 0;
1726 }
1727 #endif /* CONFIG_PMAC_BACKLIGHT */
1728
1729 void
1730 pmu_enable_irled(int on)
1731 {
1732 struct adb_request req;
1733
1734 if (vias == NULL)
1735 return ;
1736 if (pmu_kind == PMU_KEYLARGO_BASED)
1737 return ;
1738
1739 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1740 (on ? PMU_POW_ON : PMU_POW_OFF));
1741 pmu_wait_complete(&req);
1742 }
1743
1744 void
1745 pmu_restart(void)
1746 {
1747 struct adb_request req;
1748
1749 if (via == NULL)
1750 return;
1751
1752 local_irq_disable();
1753
1754 drop_interrupts = 1;
1755
1756 if (pmu_kind != PMU_KEYLARGO_BASED) {
1757 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1758 PMU_INT_TICK );
1759 while(!req.complete)
1760 pmu_poll();
1761 }
1762
1763 pmu_request(&req, NULL, 1, PMU_RESET);
1764 pmu_wait_complete(&req);
1765 for (;;)
1766 ;
1767 }
1768
1769 void
1770 pmu_shutdown(void)
1771 {
1772 struct adb_request req;
1773
1774 if (via == NULL)
1775 return;
1776
1777 local_irq_disable();
1778
1779 drop_interrupts = 1;
1780
1781 if (pmu_kind != PMU_KEYLARGO_BASED) {
1782 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1783 PMU_INT_TICK );
1784 pmu_wait_complete(&req);
1785 } else {
1786 /* Disable server mode on shutdown or we'll just
1787 * wake up again
1788 */
1789 pmu_set_server_mode(0);
1790 }
1791
1792 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1793 'M', 'A', 'T', 'T');
1794 pmu_wait_complete(&req);
1795 for (;;)
1796 ;
1797 }
1798
1799 int
1800 pmu_present(void)
1801 {
1802 return via != 0;
1803 }
1804
1805 struct pmu_i2c_hdr {
1806 u8 bus;
1807 u8 mode;
1808 u8 bus2;
1809 u8 address;
1810 u8 sub_addr;
1811 u8 comb_addr;
1812 u8 count;
1813 };
1814
1815 int
1816 pmu_i2c_combined_read(int bus, int addr, int subaddr, u8* data, int len)
1817 {
1818 struct adb_request req;
1819 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1];
1820 int retry;
1821 int rc;
1822
1823 for (retry=0; retry<16; retry++) {
1824 memset(&req, 0, sizeof(req));
1825
1826 hdr->bus = bus;
1827 hdr->address = addr & 0xfe;
1828 hdr->mode = PMU_I2C_MODE_COMBINED;
1829 hdr->bus2 = 0;
1830 hdr->sub_addr = subaddr;
1831 hdr->comb_addr = addr | 1;
1832 hdr->count = len;
1833
1834 req.nbytes = sizeof(struct pmu_i2c_hdr) + 1;
1835 req.reply_expected = 0;
1836 req.reply_len = 0;
1837 req.data[0] = PMU_I2C_CMD;
1838 req.reply[0] = 0xff;
1839 rc = pmu_queue_request(&req);
1840 if (rc)
1841 return rc;
1842 while(!req.complete)
1843 pmu_poll();
1844 if (req.reply[0] == PMU_I2C_STATUS_OK)
1845 break;
1846 mdelay(15);
1847 }
1848 if (req.reply[0] != PMU_I2C_STATUS_OK)
1849 return -1;
1850
1851 for (retry=0; retry<16; retry++) {
1852 memset(&req, 0, sizeof(req));
1853
1854 mdelay(15);
1855
1856 hdr->bus = PMU_I2C_BUS_STATUS;
1857 req.reply[0] = 0xff;
1858
1859 req.nbytes = 2;
1860 req.reply_expected = 0;
1861 req.reply_len = 0;
1862 req.data[0] = PMU_I2C_CMD;
1863 rc = pmu_queue_request(&req);
1864 if (rc)
1865 return rc;
1866 while(!req.complete)
1867 pmu_poll();
1868 if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) {
1869 memcpy(data, &req.reply[1], req.reply_len - 1);
1870 return req.reply_len - 1;
1871 }
1872 }
1873 return -1;
1874 }
1875
1876 int
1877 pmu_i2c_stdsub_write(int bus, int addr, int subaddr, u8* data, int len)
1878 {
1879 struct adb_request req;
1880 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1];
1881 int retry;
1882 int rc;
1883
1884 for (retry=0; retry<16; retry++) {
1885 memset(&req, 0, sizeof(req));
1886
1887 hdr->bus = bus;
1888 hdr->address = addr & 0xfe;
1889 hdr->mode = PMU_I2C_MODE_STDSUB;
1890 hdr->bus2 = 0;
1891 hdr->sub_addr = subaddr;
1892 hdr->comb_addr = addr & 0xfe;
1893 hdr->count = len;
1894
1895 req.data[0] = PMU_I2C_CMD;
1896 memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len);
1897 req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1;
1898 req.reply_expected = 0;
1899 req.reply_len = 0;
1900 req.reply[0] = 0xff;
1901 rc = pmu_queue_request(&req);
1902 if (rc)
1903 return rc;
1904 while(!req.complete)
1905 pmu_poll();
1906 if (req.reply[0] == PMU_I2C_STATUS_OK)
1907 break;
1908 mdelay(15);
1909 }
1910 if (req.reply[0] != PMU_I2C_STATUS_OK)
1911 return -1;
1912
1913 for (retry=0; retry<16; retry++) {
1914 memset(&req, 0, sizeof(req));
1915
1916 mdelay(15);
1917
1918 hdr->bus = PMU_I2C_BUS_STATUS;
1919 req.reply[0] = 0xff;
1920
1921 req.nbytes = 2;
1922 req.reply_expected = 0;
1923 req.reply_len = 0;
1924 req.data[0] = PMU_I2C_CMD;
1925 rc = pmu_queue_request(&req);
1926 if (rc)
1927 return rc;
1928 while(!req.complete)
1929 pmu_poll();
1930 if (req.reply[0] == PMU_I2C_STATUS_OK)
1931 return len;
1932 }
1933 return -1;
1934 }
1935
1936 int
1937 pmu_i2c_simple_read(int bus, int addr, u8* data, int len)
1938 {
1939 struct adb_request req;
1940 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1];
1941 int retry;
1942 int rc;
1943
1944 for (retry=0; retry<16; retry++) {
1945 memset(&req, 0, sizeof(req));
1946
1947 hdr->bus = bus;
1948 hdr->address = addr | 1;
1949 hdr->mode = PMU_I2C_MODE_SIMPLE;
1950 hdr->bus2 = 0;
1951 hdr->sub_addr = 0;
1952 hdr->comb_addr = 0;
1953 hdr->count = len;
1954
1955 req.data[0] = PMU_I2C_CMD;
1956 req.nbytes = sizeof(struct pmu_i2c_hdr) + 1;
1957 req.reply_expected = 0;
1958 req.reply_len = 0;
1959 req.reply[0] = 0xff;
1960 rc = pmu_queue_request(&req);
1961 if (rc)
1962 return rc;
1963 while(!req.complete)
1964 pmu_poll();
1965 if (req.reply[0] == PMU_I2C_STATUS_OK)
1966 break;
1967 mdelay(15);
1968 }
1969 if (req.reply[0] != PMU_I2C_STATUS_OK)
1970 return -1;
1971
1972 for (retry=0; retry<16; retry++) {
1973 memset(&req, 0, sizeof(req));
1974
1975 mdelay(15);
1976
1977 hdr->bus = PMU_I2C_BUS_STATUS;
1978 req.reply[0] = 0xff;
1979
1980 req.nbytes = 2;
1981 req.reply_expected = 0;
1982 req.reply_len = 0;
1983 req.data[0] = PMU_I2C_CMD;
1984 rc = pmu_queue_request(&req);
1985 if (rc)
1986 return rc;
1987 while(!req.complete)
1988 pmu_poll();
1989 if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) {
1990 memcpy(data, &req.reply[1], req.reply_len - 1);
1991 return req.reply_len - 1;
1992 }
1993 }
1994 return -1;
1995 }
1996
1997 int
1998 pmu_i2c_simple_write(int bus, int addr, u8* data, int len)
1999 {
2000 struct adb_request req;
2001 struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req.data[1];
2002 int retry;
2003 int rc;
2004
2005 for (retry=0; retry<16; retry++) {
2006 memset(&req, 0, sizeof(req));
2007
2008 hdr->bus = bus;
2009 hdr->address = addr & 0xfe;
2010 hdr->mode = PMU_I2C_MODE_SIMPLE;
2011 hdr->bus2 = 0;
2012 hdr->sub_addr = 0;
2013 hdr->comb_addr = 0;
2014 hdr->count = len;
2015
2016 req.data[0] = PMU_I2C_CMD;
2017 memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len);
2018 req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1;
2019 req.reply_expected = 0;
2020 req.reply_len = 0;
2021 req.reply[0] = 0xff;
2022 rc = pmu_queue_request(&req);
2023 if (rc)
2024 return rc;
2025 while(!req.complete)
2026 pmu_poll();
2027 if (req.reply[0] == PMU_I2C_STATUS_OK)
2028 break;
2029 mdelay(15);
2030 }
2031 if (req.reply[0] != PMU_I2C_STATUS_OK)
2032 return -1;
2033
2034 for (retry=0; retry<16; retry++) {
2035 memset(&req, 0, sizeof(req));
2036
2037 mdelay(15);
2038
2039 hdr->bus = PMU_I2C_BUS_STATUS;
2040 req.reply[0] = 0xff;
2041
2042 req.nbytes = 2;
2043 req.reply_expected = 0;
2044 req.reply_len = 0;
2045 req.data[0] = PMU_I2C_CMD;
2046 rc = pmu_queue_request(&req);
2047 if (rc)
2048 return rc;
2049 while(!req.complete)
2050 pmu_poll();
2051 if (req.reply[0] == PMU_I2C_STATUS_OK)
2052 return len;
2053 }
2054 return -1;
2055 }
2056
2057 #ifdef CONFIG_PM
2058
2059 static LIST_HEAD(sleep_notifiers);
2060
2061 int
2062 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
2063 {
2064 struct list_head *list;
2065 struct pmu_sleep_notifier *notifier;
2066
2067 for (list = sleep_notifiers.next; list != &sleep_notifiers;
2068 list = list->next) {
2069 notifier = list_entry(list, struct pmu_sleep_notifier, list);
2070 if (n->priority > notifier->priority)
2071 break;
2072 }
2073 __list_add(&n->list, list->prev, list);
2074 return 0;
2075 }
2076 EXPORT_SYMBOL(pmu_register_sleep_notifier);
2077
2078 int
2079 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
2080 {
2081 if (n->list.next == 0)
2082 return -ENOENT;
2083 list_del(&n->list);
2084 n->list.next = NULL;
2085 return 0;
2086 }
2087 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
2088 #endif /* CONFIG_PM */
2089
2090 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2091
2092 /* Sleep is broadcast last-to-first */
2093 static int
2094 broadcast_sleep(int when, int fallback)
2095 {
2096 int ret = PBOOK_SLEEP_OK;
2097 struct list_head *list;
2098 struct pmu_sleep_notifier *notifier;
2099
2100 for (list = sleep_notifiers.prev; list != &sleep_notifiers;
2101 list = list->prev) {
2102 notifier = list_entry(list, struct pmu_sleep_notifier, list);
2103 ret = notifier->notifier_call(notifier, when);
2104 if (ret != PBOOK_SLEEP_OK) {
2105 printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
2106 when, notifier, notifier->notifier_call);
2107 for (; list != &sleep_notifiers; list = list->next) {
2108 notifier = list_entry(list, struct pmu_sleep_notifier, list);
2109 notifier->notifier_call(notifier, fallback);
2110 }
2111 return ret;
2112 }
2113 }
2114 return ret;
2115 }
2116
2117 /* Wake is broadcast first-to-last */
2118 static int
2119 broadcast_wake(void)
2120 {
2121 int ret = PBOOK_SLEEP_OK;
2122 struct list_head *list;
2123 struct pmu_sleep_notifier *notifier;
2124
2125 for (list = sleep_notifiers.next; list != &sleep_notifiers;
2126 list = list->next) {
2127 notifier = list_entry(list, struct pmu_sleep_notifier, list);
2128 notifier->notifier_call(notifier, PBOOK_WAKE);
2129 }
2130 return ret;
2131 }
2132
2133 /*
2134 * This struct is used to store config register values for
2135 * PCI devices which may get powered off when we sleep.
2136 */
2137 static struct pci_save {
2138 #ifndef HACKED_PCI_SAVE
2139 u16 command;
2140 u16 cache_lat;
2141 u16 intr;
2142 u32 rom_address;
2143 #else
2144 u32 config[16];
2145 #endif
2146 } *pbook_pci_saves;
2147 static int pbook_npci_saves;
2148
2149 static void
2150 pbook_alloc_pci_save(void)
2151 {
2152 int npci;
2153 struct pci_dev *pd = NULL;
2154
2155 npci = 0;
2156 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
2157 ++npci;
2158 }
2159 if (npci == 0)
2160 return;
2161 pbook_pci_saves = (struct pci_save *)
2162 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
2163 pbook_npci_saves = npci;
2164 }
2165
2166 static void
2167 pbook_free_pci_save(void)
2168 {
2169 if (pbook_pci_saves == NULL)
2170 return;
2171 kfree(pbook_pci_saves);
2172 pbook_pci_saves = NULL;
2173 pbook_npci_saves = 0;
2174 }
2175
2176 static void
2177 pbook_pci_save(void)
2178 {
2179 struct pci_save *ps = pbook_pci_saves;
2180 struct pci_dev *pd = NULL;
2181 int npci = pbook_npci_saves;
2182
2183 if (ps == NULL)
2184 return;
2185
2186 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
2187 if (npci-- == 0)
2188 return;
2189 #ifndef HACKED_PCI_SAVE
2190 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
2191 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
2192 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
2193 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
2194 #else
2195 int i;
2196 for (i=1;i<16;i++)
2197 pci_read_config_dword(pd, i<<4, &ps->config[i]);
2198 #endif
2199 ++ps;
2200 }
2201 }
2202
2203 /* For this to work, we must take care of a few things: If gmac was enabled
2204 * during boot, it will be in the pci dev list. If it's disabled at this point
2205 * (and it will probably be), then you can't access it's config space.
2206 */
2207 static void
2208 pbook_pci_restore(void)
2209 {
2210 u16 cmd;
2211 struct pci_save *ps = pbook_pci_saves - 1;
2212 struct pci_dev *pd = NULL;
2213 int npci = pbook_npci_saves;
2214 int j;
2215
2216 while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
2217 #ifdef HACKED_PCI_SAVE
2218 int i;
2219 if (npci-- == 0)
2220 return;
2221 ps++;
2222 for (i=2;i<16;i++)
2223 pci_write_config_dword(pd, i<<4, ps->config[i]);
2224 pci_write_config_dword(pd, 4, ps->config[1]);
2225 #else
2226 if (npci-- == 0)
2227 return;
2228 ps++;
2229 if (ps->command == 0)
2230 continue;
2231 pci_read_config_word(pd, PCI_COMMAND, &cmd);
2232 if ((ps->command & ~cmd) == 0)
2233 continue;
2234 switch (pd->hdr_type) {
2235 case PCI_HEADER_TYPE_NORMAL:
2236 for (j = 0; j < 6; ++j)
2237 pci_write_config_dword(pd,
2238 PCI_BASE_ADDRESS_0 + j*4,
2239 pd->resource[j].start);
2240 pci_write_config_dword(pd, PCI_ROM_ADDRESS,
2241 ps->rom_address);
2242 pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
2243 ps->cache_lat);
2244 pci_write_config_word(pd, PCI_INTERRUPT_LINE,
2245 ps->intr);
2246 pci_write_config_word(pd, PCI_COMMAND, ps->command);
2247 break;
2248 }
2249 #endif
2250 }
2251 }
2252
2253 #ifdef DEBUG_SLEEP
2254 /* N.B. This doesn't work on the 3400 */
2255 void
2256 pmu_blink(int n)
2257 {
2258 struct adb_request req;
2259
2260 memset(&req, 0, sizeof(req));
2261
2262 for (; n > 0; --n) {
2263 req.nbytes = 4;
2264 req.done = NULL;
2265 req.data[0] = 0xee;
2266 req.data[1] = 4;
2267 req.data[2] = 0;
2268 req.data[3] = 1;
2269 req.reply[0] = ADB_RET_OK;
2270 req.reply_len = 1;
2271 req.reply_expected = 0;
2272 pmu_polled_request(&req);
2273 mdelay(50);
2274 req.nbytes = 4;
2275 req.done = NULL;
2276 req.data[0] = 0xee;
2277 req.data[1] = 4;
2278 req.data[2] = 0;
2279 req.data[3] = 0;
2280 req.reply[0] = ADB_RET_OK;
2281 req.reply_len = 1;
2282 req.reply_expected = 0;
2283 pmu_polled_request(&req);
2284 mdelay(50);
2285 }
2286 mdelay(50);
2287 }
2288 #endif
2289
2290 /*
2291 * Put the powerbook to sleep.
2292 */
2293
2294 static u32 save_via[8];
2295
2296 static void
2297 save_via_state(void)
2298 {
2299 save_via[0] = in_8(&via[ANH]);
2300 save_via[1] = in_8(&via[DIRA]);
2301 save_via[2] = in_8(&via[B]);
2302 save_via[3] = in_8(&via[DIRB]);
2303 save_via[4] = in_8(&via[PCR]);
2304 save_via[5] = in_8(&via[ACR]);
2305 save_via[6] = in_8(&via[T1CL]);
2306 save_via[7] = in_8(&via[T1CH]);
2307 }
2308 static void
2309 restore_via_state(void)
2310 {
2311 out_8(&via[ANH], save_via[0]);
2312 out_8(&via[DIRA], save_via[1]);
2313 out_8(&via[B], save_via[2]);
2314 out_8(&via[DIRB], save_via[3]);
2315 out_8(&via[PCR], save_via[4]);
2316 out_8(&via[ACR], save_via[5]);
2317 out_8(&via[T1CL], save_via[6]);
2318 out_8(&via[T1CH], save_via[7]);
2319 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
2320 out_8(&via[IFR], 0x7f); /* clear IFR */
2321 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
2322 }
2323
2324 static int
2325 pmac_suspend_devices(void)
2326 {
2327 int ret;
2328
2329 pm_prepare_console();
2330
2331 /* Notify old-style device drivers & userland */
2332 ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
2333 if (ret != PBOOK_SLEEP_OK) {
2334 printk(KERN_ERR "Sleep rejected by drivers\n");
2335 return -EBUSY;
2336 }
2337
2338 /* Sync the disks. */
2339 /* XXX It would be nice to have some way to ensure that
2340 * nobody is dirtying any new buffers while we wait. That
2341 * could be achieved using the refrigerator for processes
2342 * that swsusp uses
2343 */
2344 sys_sync();
2345
2346 /* Sleep can fail now. May not be very robust but useful for debugging */
2347 ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
2348 if (ret != PBOOK_SLEEP_OK) {
2349 printk(KERN_ERR "Driver sleep failed\n");
2350 return -EBUSY;
2351 }
2352
2353 /* Send suspend call to devices, hold the device core's dpm_sem */
2354 ret = device_suspend(PMSG_SUSPEND);
2355 if (ret) {
2356 broadcast_wake();
2357 printk(KERN_ERR "Driver sleep failed\n");
2358 return -EBUSY;
2359 }
2360
2361 /* Disable clock spreading on some machines */
2362 pmac_tweak_clock_spreading(0);
2363
2364 /* Stop preemption */
2365 preempt_disable();
2366
2367 /* Make sure the decrementer won't interrupt us */
2368 asm volatile("mtdec %0" : : "r" (0x7fffffff));
2369 /* Make sure any pending DEC interrupt occurring while we did
2370 * the above didn't re-enable the DEC */
2371 mb();
2372 asm volatile("mtdec %0" : : "r" (0x7fffffff));
2373
2374 /* We can now disable MSR_EE. This code of course works properly only
2375 * on UP machines... For SMP, if we ever implement sleep, we'll have to
2376 * stop the "other" CPUs way before we do all that stuff.
2377 */
2378 local_irq_disable();
2379
2380 /* Broadcast power down irq
2381 * This isn't that useful in most cases (only directly wired devices can
2382 * use this but still... This will take care of sysdev's as well, so
2383 * we exit from here with local irqs disabled and PIC off.
2384 */
2385 ret = device_power_down(PMSG_SUSPEND);
2386 if (ret) {
2387 wakeup_decrementer();
2388 local_irq_enable();
2389 preempt_enable();
2390 device_resume();
2391 broadcast_wake();
2392 printk(KERN_ERR "Driver powerdown failed\n");
2393 return -EBUSY;
2394 }
2395
2396 /* Wait for completion of async backlight requests */
2397 while (!bright_req_1.complete || !bright_req_2.complete ||
2398 !batt_req.complete)
2399 pmu_poll();
2400
2401 /* Giveup the lazy FPU & vec so we don't have to back them
2402 * up from the low level code
2403 */
2404 enable_kernel_fp();
2405
2406 #ifdef CONFIG_ALTIVEC
2407 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2408 enable_kernel_altivec();
2409 #endif /* CONFIG_ALTIVEC */
2410
2411 return 0;
2412 }
2413
2414 static int
2415 pmac_wakeup_devices(void)
2416 {
2417 mdelay(100);
2418
2419 /* Power back up system devices (including the PIC) */
2420 device_power_up();
2421
2422 /* Force a poll of ADB interrupts */
2423 adb_int_pending = 1;
2424 via_pmu_interrupt(0, NULL, NULL);
2425
2426 /* Restart jiffies & scheduling */
2427 wakeup_decrementer();
2428
2429 /* Re-enable local CPU interrupts */
2430 local_irq_enable();
2431 mdelay(10);
2432 preempt_enable();
2433
2434 /* Re-enable clock spreading on some machines */
2435 pmac_tweak_clock_spreading(1);
2436
2437 /* Resume devices */
2438 device_resume();
2439
2440 /* Notify old style drivers */
2441 broadcast_wake();
2442
2443 pm_restore_console();
2444
2445 return 0;
2446 }
2447
2448 #define GRACKLE_PM (1<<7)
2449 #define GRACKLE_DOZE (1<<5)
2450 #define GRACKLE_NAP (1<<4)
2451 #define GRACKLE_SLEEP (1<<3)
2452
2453 int
2454 powerbook_sleep_grackle(void)
2455 {
2456 unsigned long save_l2cr;
2457 unsigned short pmcr1;
2458 struct adb_request req;
2459 int ret;
2460 struct pci_dev *grackle;
2461
2462 grackle = pci_find_slot(0, 0);
2463 if (!grackle)
2464 return -ENODEV;
2465
2466 ret = pmac_suspend_devices();
2467 if (ret) {
2468 printk(KERN_ERR "Sleep rejected by devices\n");
2469 return ret;
2470 }
2471
2472 /* Turn off various things. Darwin does some retry tests here... */
2473 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2474 pmu_wait_complete(&req);
2475 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2476 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2477 pmu_wait_complete(&req);
2478
2479 /* For 750, save backside cache setting and disable it */
2480 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
2481
2482 if (!__fake_sleep) {
2483 /* Ask the PMU to put us to sleep */
2484 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2485 pmu_wait_complete(&req);
2486 }
2487
2488 /* The VIA is supposed not to be restored correctly*/
2489 save_via_state();
2490 /* We shut down some HW */
2491 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2492
2493 pci_read_config_word(grackle, 0x70, &pmcr1);
2494 /* Apparently, MacOS uses NAP mode for Grackle ??? */
2495 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2496 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2497 pci_write_config_word(grackle, 0x70, pmcr1);
2498
2499 /* Call low-level ASM sleep handler */
2500 if (__fake_sleep)
2501 mdelay(5000);
2502 else
2503 low_sleep_handler();
2504
2505 /* We're awake again, stop grackle PM */
2506 pci_read_config_word(grackle, 0x70, &pmcr1);
2507 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2508 pci_write_config_word(grackle, 0x70, pmcr1);
2509
2510 /* Make sure the PMU is idle */
2511 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2512 restore_via_state();
2513
2514 /* Restore L2 cache */
2515 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2516 _set_L2CR(save_l2cr);
2517
2518 /* Restore userland MMU context */
2519 set_context(current->active_mm->context, current->active_mm->pgd);
2520
2521 /* Power things up */
2522 pmu_unlock();
2523 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2524 pmu_wait_complete(&req);
2525 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2526 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2527 pmu_wait_complete(&req);
2528 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2529 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2530 pmu_wait_complete(&req);
2531
2532 pmac_wakeup_devices();
2533
2534 return 0;
2535 }
2536
2537 static int
2538 powerbook_sleep_Core99(void)
2539 {
2540 unsigned long save_l2cr;
2541 unsigned long save_l3cr;
2542 struct adb_request req;
2543 int ret;
2544
2545 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2546 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2547 return -ENOSYS;
2548 }
2549
2550 if (num_online_cpus() > 1 || cpu_is_offline(0))
2551 return -EAGAIN;
2552
2553 ret = pmac_suspend_devices();
2554 if (ret) {
2555 printk(KERN_ERR "Sleep rejected by devices\n");
2556 return ret;
2557 }
2558
2559 /* Stop environment and ADB interrupts */
2560 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2561 pmu_wait_complete(&req);
2562
2563 /* Tell PMU what events will wake us up */
2564 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2565 0xff, 0xff);
2566 pmu_wait_complete(&req);
2567 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2568 0, PMU_PWR_WAKEUP_KEY |
2569 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2570 pmu_wait_complete(&req);
2571
2572 /* Save the state of the L2 and L3 caches */
2573 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
2574 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
2575
2576 if (!__fake_sleep) {
2577 /* Ask the PMU to put us to sleep */
2578 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2579 pmu_wait_complete(&req);
2580 }
2581
2582 /* The VIA is supposed not to be restored correctly*/
2583 save_via_state();
2584
2585 /* Shut down various ASICs. There's a chance that we can no longer
2586 * talk to the PMU after this, so I moved it to _after_ sending the
2587 * sleep command to it. Still need to be checked.
2588 */
2589 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2590
2591 /* Call low-level ASM sleep handler */
2592 if (__fake_sleep)
2593 mdelay(5000);
2594 else
2595 low_sleep_handler();
2596
2597 /* Restore Apple core ASICs state */
2598 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2599
2600 /* Restore VIA */
2601 restore_via_state();
2602
2603 /* tweak LPJ before cpufreq is there */
2604 loops_per_jiffy *= 2;
2605
2606 /* Restore video */
2607 pmac_call_early_video_resume();
2608
2609 /* Restore L2 cache */
2610 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2611 _set_L2CR(save_l2cr);
2612 /* Restore L3 cache */
2613 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2614 _set_L3CR(save_l3cr);
2615
2616 /* Restore userland MMU context */
2617 set_context(current->active_mm->context, current->active_mm->pgd);
2618
2619 /* Tell PMU we are ready */
2620 pmu_unlock();
2621 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2622 pmu_wait_complete(&req);
2623 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2624 pmu_wait_complete(&req);
2625
2626 /* Restore LPJ, cpufreq will adjust the cpu frequency */
2627 loops_per_jiffy /= 2;
2628
2629 pmac_wakeup_devices();
2630
2631 return 0;
2632 }
2633
2634 #define PB3400_MEM_CTRL 0xf8000000
2635 #define PB3400_MEM_CTRL_SLEEP 0x70
2636
2637 static int
2638 powerbook_sleep_3400(void)
2639 {
2640 int ret, i, x;
2641 unsigned int hid0;
2642 unsigned long p;
2643 struct adb_request sleep_req;
2644 void __iomem *mem_ctrl;
2645 unsigned int __iomem *mem_ctrl_sleep;
2646
2647 /* first map in the memory controller registers */
2648 mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2649 if (mem_ctrl == NULL) {
2650 printk("powerbook_sleep_3400: ioremap failed\n");
2651 return -ENOMEM;
2652 }
2653 mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2654
2655 /* Allocate room for PCI save */
2656 pbook_alloc_pci_save();
2657
2658 ret = pmac_suspend_devices();
2659 if (ret) {
2660 pbook_free_pci_save();
2661 printk(KERN_ERR "Sleep rejected by devices\n");
2662 return ret;
2663 }
2664
2665 /* Save the state of PCI config space for some slots */
2666 pbook_pci_save();
2667
2668 /* Set the memory controller to keep the memory refreshed
2669 while we're asleep */
2670 for (i = 0x403f; i >= 0x4000; --i) {
2671 out_be32(mem_ctrl_sleep, i);
2672 do {
2673 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2674 } while (x == 0);
2675 if (x >= 0x100)
2676 break;
2677 }
2678
2679 /* Ask the PMU to put us to sleep */
2680 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2681 while (!sleep_req.complete)
2682 mb();
2683
2684 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2685
2686 /* displacement-flush the L2 cache - necessary? */
2687 for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2688 i = *(volatile int *)p;
2689 asleep = 1;
2690
2691 /* Put the CPU into sleep mode */
2692 hid0 = mfspr(SPRN_HID0);
2693 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2694 mtspr(SPRN_HID0, hid0);
2695 mtmsr(mfmsr() | MSR_POW | MSR_EE);
2696 udelay(10);
2697
2698 /* OK, we're awake again, start restoring things */
2699 out_be32(mem_ctrl_sleep, 0x3f);
2700 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2701 pbook_pci_restore();
2702 pmu_unlock();
2703
2704 /* wait for the PMU interrupt sequence to complete */
2705 while (asleep)
2706 mb();
2707
2708 pmac_wakeup_devices();
2709 pbook_free_pci_save();
2710 iounmap(mem_ctrl);
2711
2712 return 0;
2713 }
2714
2715 #endif /* CONFIG_PM && CONFIG_PPC32 */
2716
2717 /*
2718 * Support for /dev/pmu device
2719 */
2720 #define RB_SIZE 0x10
2721 struct pmu_private {
2722 struct list_head list;
2723 int rb_get;
2724 int rb_put;
2725 struct rb_entry {
2726 unsigned short len;
2727 unsigned char data[16];
2728 } rb_buf[RB_SIZE];
2729 wait_queue_head_t wait;
2730 spinlock_t lock;
2731 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2732 int backlight_locker;
2733 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2734 };
2735
2736 static LIST_HEAD(all_pmu_pvt);
2737 static DEFINE_SPINLOCK(all_pvt_lock);
2738
2739 static void
2740 pmu_pass_intr(unsigned char *data, int len)
2741 {
2742 struct pmu_private *pp;
2743 struct list_head *list;
2744 int i;
2745 unsigned long flags;
2746
2747 if (len > sizeof(pp->rb_buf[0].data))
2748 len = sizeof(pp->rb_buf[0].data);
2749 spin_lock_irqsave(&all_pvt_lock, flags);
2750 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2751 pp = list_entry(list, struct pmu_private, list);
2752 spin_lock(&pp->lock);
2753 i = pp->rb_put + 1;
2754 if (i >= RB_SIZE)
2755 i = 0;
2756 if (i != pp->rb_get) {
2757 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2758 rp->len = len;
2759 memcpy(rp->data, data, len);
2760 pp->rb_put = i;
2761 wake_up_interruptible(&pp->wait);
2762 }
2763 spin_unlock(&pp->lock);
2764 }
2765 spin_unlock_irqrestore(&all_pvt_lock, flags);
2766 }
2767
2768 static int
2769 pmu_open(struct inode *inode, struct file *file)
2770 {
2771 struct pmu_private *pp;
2772 unsigned long flags;
2773
2774 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2775 if (pp == 0)
2776 return -ENOMEM;
2777 pp->rb_get = pp->rb_put = 0;
2778 spin_lock_init(&pp->lock);
2779 init_waitqueue_head(&pp->wait);
2780 spin_lock_irqsave(&all_pvt_lock, flags);
2781 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2782 pp->backlight_locker = 0;
2783 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2784 list_add(&pp->list, &all_pmu_pvt);
2785 spin_unlock_irqrestore(&all_pvt_lock, flags);
2786 file->private_data = pp;
2787 return 0;
2788 }
2789
2790 static ssize_t
2791 pmu_read(struct file *file, char __user *buf,
2792 size_t count, loff_t *ppos)
2793 {
2794 struct pmu_private *pp = file->private_data;
2795 DECLARE_WAITQUEUE(wait, current);
2796 unsigned long flags;
2797 int ret = 0;
2798
2799 if (count < 1 || pp == 0)
2800 return -EINVAL;
2801 if (!access_ok(VERIFY_WRITE, buf, count))
2802 return -EFAULT;
2803
2804 spin_lock_irqsave(&pp->lock, flags);
2805 add_wait_queue(&pp->wait, &wait);
2806 current->state = TASK_INTERRUPTIBLE;
2807
2808 for (;;) {
2809 ret = -EAGAIN;
2810 if (pp->rb_get != pp->rb_put) {
2811 int i = pp->rb_get;
2812 struct rb_entry *rp = &pp->rb_buf[i];
2813 ret = rp->len;
2814 spin_unlock_irqrestore(&pp->lock, flags);
2815 if (ret > count)
2816 ret = count;
2817 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2818 ret = -EFAULT;
2819 if (++i >= RB_SIZE)
2820 i = 0;
2821 spin_lock_irqsave(&pp->lock, flags);
2822 pp->rb_get = i;
2823 }
2824 if (ret >= 0)
2825 break;
2826 if (file->f_flags & O_NONBLOCK)
2827 break;
2828 ret = -ERESTARTSYS;
2829 if (signal_pending(current))
2830 break;
2831 spin_unlock_irqrestore(&pp->lock, flags);
2832 schedule();
2833 spin_lock_irqsave(&pp->lock, flags);
2834 }
2835 current->state = TASK_RUNNING;
2836 remove_wait_queue(&pp->wait, &wait);
2837 spin_unlock_irqrestore(&pp->lock, flags);
2838
2839 return ret;
2840 }
2841
2842 static ssize_t
2843 pmu_write(struct file *file, const char __user *buf,
2844 size_t count, loff_t *ppos)
2845 {
2846 return 0;
2847 }
2848
2849 static unsigned int
2850 pmu_fpoll(struct file *filp, poll_table *wait)
2851 {
2852 struct pmu_private *pp = filp->private_data;
2853 unsigned int mask = 0;
2854 unsigned long flags;
2855
2856 if (pp == 0)
2857 return 0;
2858 poll_wait(filp, &pp->wait, wait);
2859 spin_lock_irqsave(&pp->lock, flags);
2860 if (pp->rb_get != pp->rb_put)
2861 mask |= POLLIN;
2862 spin_unlock_irqrestore(&pp->lock, flags);
2863 return mask;
2864 }
2865
2866 static int
2867 pmu_release(struct inode *inode, struct file *file)
2868 {
2869 struct pmu_private *pp = file->private_data;
2870 unsigned long flags;
2871
2872 lock_kernel();
2873 if (pp != 0) {
2874 file->private_data = NULL;
2875 spin_lock_irqsave(&all_pvt_lock, flags);
2876 list_del(&pp->list);
2877 spin_unlock_irqrestore(&all_pvt_lock, flags);
2878 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2879 if (pp->backlight_locker) {
2880 spin_lock_irqsave(&pmu_lock, flags);
2881 disable_kernel_backlight--;
2882 spin_unlock_irqrestore(&pmu_lock, flags);
2883 }
2884 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2885 kfree(pp);
2886 }
2887 unlock_kernel();
2888 return 0;
2889 }
2890
2891 static int
2892 pmu_ioctl(struct inode * inode, struct file *filp,
2893 u_int cmd, u_long arg)
2894 {
2895 __u32 __user *argp = (__u32 __user *)arg;
2896 int error = -EINVAL;
2897
2898 switch (cmd) {
2899 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2900 case PMU_IOC_SLEEP:
2901 if (!capable(CAP_SYS_ADMIN))
2902 return -EACCES;
2903 if (sleep_in_progress)
2904 return -EBUSY;
2905 sleep_in_progress = 1;
2906 switch (pmu_kind) {
2907 case PMU_OHARE_BASED:
2908 error = powerbook_sleep_3400();
2909 break;
2910 case PMU_HEATHROW_BASED:
2911 case PMU_PADDINGTON_BASED:
2912 error = powerbook_sleep_grackle();
2913 break;
2914 case PMU_KEYLARGO_BASED:
2915 error = powerbook_sleep_Core99();
2916 break;
2917 default:
2918 error = -ENOSYS;
2919 }
2920 sleep_in_progress = 0;
2921 break;
2922 case PMU_IOC_CAN_SLEEP:
2923 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2924 return put_user(0, argp);
2925 else
2926 return put_user(1, argp);
2927 #endif /* CONFIG_PM && CONFIG_PPC32 */
2928
2929 #ifdef CONFIG_PMAC_BACKLIGHT
2930 /* Backlight should have its own device or go via
2931 * the fbdev
2932 */
2933 case PMU_IOC_GET_BACKLIGHT:
2934 if (sleep_in_progress)
2935 return -EBUSY;
2936 error = get_backlight_level();
2937 if (error < 0)
2938 return error;
2939 return put_user(error, argp);
2940 case PMU_IOC_SET_BACKLIGHT:
2941 {
2942 __u32 value;
2943 if (sleep_in_progress)
2944 return -EBUSY;
2945 error = get_user(value, argp);
2946 if (!error)
2947 error = set_backlight_level(value);
2948 break;
2949 }
2950 #ifdef CONFIG_INPUT_ADBHID
2951 case PMU_IOC_GRAB_BACKLIGHT: {
2952 struct pmu_private *pp = filp->private_data;
2953 unsigned long flags;
2954
2955 if (pp->backlight_locker)
2956 return 0;
2957 pp->backlight_locker = 1;
2958 spin_lock_irqsave(&pmu_lock, flags);
2959 disable_kernel_backlight++;
2960 spin_unlock_irqrestore(&pmu_lock, flags);
2961 return 0;
2962 }
2963 #endif /* CONFIG_INPUT_ADBHID */
2964 #endif /* CONFIG_PMAC_BACKLIGHT */
2965 case PMU_IOC_GET_MODEL:
2966 return put_user(pmu_kind, argp);
2967 case PMU_IOC_HAS_ADB:
2968 return put_user(pmu_has_adb, argp);
2969 }
2970 return error;
2971 }
2972
2973 static struct file_operations pmu_device_fops = {
2974 .read = pmu_read,
2975 .write = pmu_write,
2976 .poll = pmu_fpoll,
2977 .ioctl = pmu_ioctl,
2978 .open = pmu_open,
2979 .release = pmu_release,
2980 };
2981
2982 static struct miscdevice pmu_device = {
2983 PMU_MINOR, "pmu", &pmu_device_fops
2984 };
2985
2986 static int pmu_device_init(void)
2987 {
2988 if (!via)
2989 return 0;
2990 if (misc_register(&pmu_device) < 0)
2991 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2992 return 0;
2993 }
2994 device_initcall(pmu_device_init);
2995
2996
2997 #ifdef DEBUG_SLEEP
2998 static inline void
2999 polled_handshake(volatile unsigned char __iomem *via)
3000 {
3001 via[B] &= ~TREQ; eieio();
3002 while ((via[B] & TACK) != 0)
3003 ;
3004 via[B] |= TREQ; eieio();
3005 while ((via[B] & TACK) == 0)
3006 ;
3007 }
3008
3009 static inline void
3010 polled_send_byte(volatile unsigned char __iomem *via, int x)
3011 {
3012 via[ACR] |= SR_OUT | SR_EXT; eieio();
3013 via[SR] = x; eieio();
3014 polled_handshake(via);
3015 }
3016
3017 static inline int
3018 polled_recv_byte(volatile unsigned char __iomem *via)
3019 {
3020 int x;
3021
3022 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
3023 x = via[SR]; eieio();
3024 polled_handshake(via);
3025 x = via[SR]; eieio();
3026 return x;
3027 }
3028
3029 int
3030 pmu_polled_request(struct adb_request *req)
3031 {
3032 unsigned long flags;
3033 int i, l, c;
3034 volatile unsigned char __iomem *v = via;
3035
3036 req->complete = 1;
3037 c = req->data[0];
3038 l = pmu_data_len[c][0];
3039 if (l >= 0 && req->nbytes != l + 1)
3040 return -EINVAL;
3041
3042 local_irq_save(flags);
3043 while (pmu_state != idle)
3044 pmu_poll();
3045
3046 while ((via[B] & TACK) == 0)
3047 ;
3048 polled_send_byte(v, c);
3049 if (l < 0) {
3050 l = req->nbytes - 1;
3051 polled_send_byte(v, l);
3052 }
3053 for (i = 1; i <= l; ++i)
3054 polled_send_byte(v, req->data[i]);
3055
3056 l = pmu_data_len[c][1];
3057 if (l < 0)
3058 l = polled_recv_byte(v);
3059 for (i = 0; i < l; ++i)
3060 req->reply[i + req->reply_len] = polled_recv_byte(v);
3061
3062 if (req->done)
3063 (*req->done)(req);
3064
3065 local_irq_restore(flags);
3066 return 0;
3067 }
3068 #endif /* DEBUG_SLEEP */
3069
3070
3071 /* FIXME: This is a temporary set of callbacks to enable us
3072 * to do suspend-to-disk.
3073 */
3074
3075 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
3076
3077 static int pmu_sys_suspended = 0;
3078
3079 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
3080 {
3081 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
3082 return 0;
3083
3084 /* Suspend PMU event interrupts */
3085 pmu_suspend();
3086
3087 pmu_sys_suspended = 1;
3088 return 0;
3089 }
3090
3091 static int pmu_sys_resume(struct sys_device *sysdev)
3092 {
3093 struct adb_request req;
3094
3095 if (!pmu_sys_suspended)
3096 return 0;
3097
3098 /* Tell PMU we are ready */
3099 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
3100 pmu_wait_complete(&req);
3101
3102 /* Resume PMU event interrupts */
3103 pmu_resume();
3104
3105 pmu_sys_suspended = 0;
3106
3107 return 0;
3108 }
3109
3110 #endif /* CONFIG_PM && CONFIG_PPC32 */
3111
3112 static struct sysdev_class pmu_sysclass = {
3113 set_kset_name("pmu"),
3114 };
3115
3116 static struct sys_device device_pmu = {
3117 .id = 0,
3118 .cls = &pmu_sysclass,
3119 };
3120
3121 static struct sysdev_driver driver_pmu = {
3122 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
3123 .suspend = &pmu_sys_suspend,
3124 .resume = &pmu_sys_resume,
3125 #endif /* CONFIG_PM && CONFIG_PPC32 */
3126 };
3127
3128 static int __init init_pmu_sysfs(void)
3129 {
3130 int rc;
3131
3132 rc = sysdev_class_register(&pmu_sysclass);
3133 if (rc) {
3134 printk(KERN_ERR "Failed registering PMU sys class\n");
3135 return -ENODEV;
3136 }
3137 rc = sysdev_register(&device_pmu);
3138 if (rc) {
3139 printk(KERN_ERR "Failed registering PMU sys device\n");
3140 return -ENODEV;
3141 }
3142 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
3143 if (rc) {
3144 printk(KERN_ERR "Failed registering PMU sys driver\n");
3145 return -ENODEV;
3146 }
3147 return 0;
3148 }
3149
3150 subsys_initcall(init_pmu_sysfs);
3151
3152 EXPORT_SYMBOL(pmu_request);
3153 EXPORT_SYMBOL(pmu_poll);
3154 EXPORT_SYMBOL(pmu_poll_adb);
3155 EXPORT_SYMBOL(pmu_wait_complete);
3156 EXPORT_SYMBOL(pmu_suspend);
3157 EXPORT_SYMBOL(pmu_resume);
3158 EXPORT_SYMBOL(pmu_unlock);
3159 EXPORT_SYMBOL(pmu_i2c_combined_read);
3160 EXPORT_SYMBOL(pmu_i2c_stdsub_write);
3161 EXPORT_SYMBOL(pmu_i2c_simple_read);
3162 EXPORT_SYMBOL(pmu_i2c_simple_write);
3163 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
3164 EXPORT_SYMBOL(pmu_enable_irled);
3165 EXPORT_SYMBOL(pmu_battery_count);
3166 EXPORT_SYMBOL(pmu_batteries);
3167 EXPORT_SYMBOL(pmu_power_flags);
3168 #endif /* CONFIG_PM && CONFIG_PPC32 */
3169
Linux kernel - Deliverables
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