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via-pmu.c
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1 /*
2  * Device driver for the via-pmu on Apple Powermacs.
3  *
4  * The VIA (versatile interface adapter) interfaces to the PMU,
5  * a 6805 microprocessor core whose primary function is to control
6  * battery charging and system power on the PowerBook 3400 and 2400.
7  * The PMU also controls the ADB (Apple Desktop Bus) which connects
8  * to the keyboard and mouse, as well as the non-volatile RAM
9  * and the RTC (real time clock) chip.
10  *
11  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
12  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
13  * Copyright (C) 2006-2007 Johannes Berg
14  *
15  * THIS DRIVER IS BECOMING A TOTAL MESS !
16  * - Cleanup atomically disabling reply to PMU events after
17  * a sleep or a freq. switch
18  *
19  */
20 #include <stdarg.h>
21 #include <linux/mutex.h>
22 #include <linux/types.h>
23 #include <linux/errno.h>
24 #include <linux/kernel.h>
25 #include <linux/delay.h>
26 #include <linux/sched.h>
27 #include <linux/miscdevice.h>
28 #include <linux/blkdev.h>
29 #include <linux/pci.h>
30 #include <linux/slab.h>
31 #include <linux/poll.h>
32 #include <linux/adb.h>
33 #include <linux/pmu.h>
34 #include <linux/cuda.h>
35 #include <linux/module.h>
36 #include <linux/spinlock.h>
37 #include <linux/pm.h>
38 #include <linux/proc_fs.h>
39 #include <linux/seq_file.h>
40 #include <linux/init.h>
41 #include <linux/interrupt.h>
42 #include <linux/device.h>
43 #include <linux/syscore_ops.h>
44 #include <linux/freezer.h>
45 #include <linux/syscalls.h>
46 #include <linux/suspend.h>
47 #include <linux/cpu.h>
48 #include <linux/compat.h>
49 #include <asm/prom.h>
50 #include <asm/machdep.h>
51 #include <asm/io.h>
52 #include <asm/pgtable.h>
53 #include <asm/sections.h>
54 #include <asm/irq.h>
55 #include <asm/pmac_feature.h>
56 #include <asm/pmac_pfunc.h>
57 #include <asm/pmac_low_i2c.h>
58 #include <asm/uaccess.h>
59 #include <asm/mmu_context.h>
60 #include <asm/cputable.h>
61 #include <asm/time.h>
62 #include <asm/backlight.h>
63 
64 #include "via-pmu-event.h"
65 
66 /* Some compile options */
67 #undef DEBUG_SLEEP
68 
69 /* Misc minor number allocated for /dev/pmu */
70 #define PMU_MINOR 154
71 
72 /* How many iterations between battery polls */
73 #define BATTERY_POLLING_COUNT 2
74 
75 static DEFINE_MUTEX(pmu_info_proc_mutex);
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  /*
1399  * XXX On the [23]400 the PMU gives us an up
1400  * event for keycodes 0x74 or 0x75 when the PC
1401  * card eject buttons are released, so we
1402  * ignore those events.
1403  */
1404  if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1405  && data[1] == 0x2c && data[3] == 0xff
1406  && (data[2] & ~1) == 0xf4))
1407  adb_input(data+1, len-1, 1);
1408 #endif /* CONFIG_ADB */
1409  }
1410  }
1411  /* Sound/brightness button pressed */
1412  else if ((1 << pirq) & PMU_INT_SNDBRT) {
1413 #ifdef CONFIG_PMAC_BACKLIGHT
1414  if (len == 3)
1415  pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1416 #endif
1417  }
1418  /* Tick interrupt */
1419  else if ((1 << pirq) & PMU_INT_TICK) {
1420  /* Environement or tick interrupt, query batteries */
1421  if (pmu_battery_count) {
1422  if ((--query_batt_timer) == 0) {
1423  query_battery_state();
1424  query_batt_timer = BATTERY_POLLING_COUNT;
1425  }
1426  }
1427  }
1428  else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1429  if (pmu_battery_count)
1430  query_battery_state();
1431  pmu_pass_intr(data, len);
1432  /* len == 6 is probably a bad check. But how do I
1433  * know what PMU versions send what events here? */
1434  if (len == 6) {
1435  via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1436  via_pmu_event(PMU_EVT_LID, data[1]&1);
1437  }
1438  } else {
1439  pmu_pass_intr(data, len);
1440  }
1441  goto next;
1442 }
1443 
1444 static struct adb_request*
1445 pmu_sr_intr(void)
1446 {
1447  struct adb_request *req;
1448  int bite = 0;
1449 
1450  if (via[B] & TREQ) {
1451  printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1452  out_8(&via[IFR], SR_INT);
1453  return NULL;
1454  }
1455  /* The ack may not yet be low when we get the interrupt */
1456  while ((in_8(&via[B]) & TACK) != 0)
1457  ;
1458 
1459  /* if reading grab the byte, and reset the interrupt */
1460  if (pmu_state == reading || pmu_state == reading_intr)
1461  bite = in_8(&via[SR]);
1462 
1463  /* reset TREQ and wait for TACK to go high */
1464  out_8(&via[B], in_8(&via[B]) | TREQ);
1465  wait_for_ack();
1466 
1467  switch (pmu_state) {
1468  case sending:
1469  req = current_req;
1470  if (data_len < 0) {
1471  data_len = req->nbytes - 1;
1472  send_byte(data_len);
1473  break;
1474  }
1475  if (data_index <= data_len) {
1476  send_byte(req->data[data_index++]);
1477  break;
1478  }
1479  req->sent = 1;
1480  data_len = pmu_data_len[req->data[0]][1];
1481  if (data_len == 0) {
1482  pmu_state = idle;
1483  current_req = req->next;
1484  if (req->reply_expected)
1485  req_awaiting_reply = req;
1486  else
1487  return req;
1488  } else {
1489  pmu_state = reading;
1490  data_index = 0;
1491  reply_ptr = req->reply + req->reply_len;
1492  recv_byte();
1493  }
1494  break;
1495 
1496  case intack:
1497  data_index = 0;
1498  data_len = -1;
1499  pmu_state = reading_intr;
1500  reply_ptr = interrupt_data[int_data_last];
1501  recv_byte();
1502  if (gpio_irq >= 0 && !gpio_irq_enabled) {
1503  enable_irq(gpio_irq);
1504  gpio_irq_enabled = 1;
1505  }
1506  break;
1507 
1508  case reading:
1509  case reading_intr:
1510  if (data_len == -1) {
1511  data_len = bite;
1512  if (bite > 32)
1513  printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1514  } else if (data_index < 32) {
1515  reply_ptr[data_index++] = bite;
1516  }
1517  if (data_index < data_len) {
1518  recv_byte();
1519  break;
1520  }
1521 
1522  if (pmu_state == reading_intr) {
1523  pmu_state = idle;
1524  int_data_state[int_data_last] = int_data_ready;
1525  interrupt_data_len[int_data_last] = data_len;
1526  } else {
1527  req = current_req;
1528  /*
1529  * For PMU sleep and freq change requests, we lock the
1530  * PMU until it's explicitly unlocked. This avoids any
1531  * spurrious event polling getting in
1532  */
1533  current_req = req->next;
1534  req->reply_len += data_index;
1535  if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1536  pmu_state = locked;
1537  else
1538  pmu_state = idle;
1539  return req;
1540  }
1541  break;
1542 
1543  default:
1544  printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1545  pmu_state);
1546  }
1547  return NULL;
1548 }
1549 
1550 static irqreturn_t
1551 via_pmu_interrupt(int irq, void *arg)
1552 {
1553  unsigned long flags;
1554  int intr;
1555  int nloop = 0;
1556  int int_data = -1;
1557  struct adb_request *req = NULL;
1558  int handled = 0;
1559 
1560  /* This is a bit brutal, we can probably do better */
1561  spin_lock_irqsave(&pmu_lock, flags);
1562  ++disable_poll;
1563 
1564  for (;;) {
1565  intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1566  if (intr == 0)
1567  break;
1568  handled = 1;
1569  if (++nloop > 1000) {
1570  printk(KERN_DEBUG "PMU: stuck in intr loop, "
1571  "intr=%x, ier=%x pmu_state=%d\n",
1572  intr, in_8(&via[IER]), pmu_state);
1573  break;
1574  }
1575  out_8(&via[IFR], intr);
1576  if (intr & CB1_INT) {
1577  adb_int_pending = 1;
1578  pmu_irq_stats[0]++;
1579  }
1580  if (intr & SR_INT) {
1581  req = pmu_sr_intr();
1582  if (req)
1583  break;
1584  }
1585  }
1586 
1587 recheck:
1588  if (pmu_state == idle) {
1589  if (adb_int_pending) {
1590  if (int_data_state[0] == int_data_empty)
1591  int_data_last = 0;
1592  else if (int_data_state[1] == int_data_empty)
1593  int_data_last = 1;
1594  else
1595  goto no_free_slot;
1596  pmu_state = intack;
1597  int_data_state[int_data_last] = int_data_fill;
1598  /* Sounds safer to make sure ACK is high before writing.
1599  * This helped kill a problem with ADB and some iBooks
1600  */
1601  wait_for_ack();
1602  send_byte(PMU_INT_ACK);
1603  adb_int_pending = 0;
1604  } else if (current_req)
1605  pmu_start();
1606  }
1607 no_free_slot:
1608  /* Mark the oldest buffer for flushing */
1609  if (int_data_state[!int_data_last] == int_data_ready) {
1610  int_data_state[!int_data_last] = int_data_flush;
1611  int_data = !int_data_last;
1612  } else 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  }
1616  --disable_poll;
1617  spin_unlock_irqrestore(&pmu_lock, flags);
1618 
1619  /* Deal with completed PMU requests outside of the lock */
1620  if (req) {
1621  pmu_done(req);
1622  req = NULL;
1623  }
1624 
1625  /* Deal with interrupt datas outside of the lock */
1626  if (int_data >= 0) {
1627  pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1628  spin_lock_irqsave(&pmu_lock, flags);
1629  ++disable_poll;
1630  int_data_state[int_data] = int_data_empty;
1631  int_data = -1;
1632  goto recheck;
1633  }
1634 
1635  return IRQ_RETVAL(handled);
1636 }
1637 
1638 void
1639 pmu_unlock(void)
1640 {
1641  unsigned long flags;
1642 
1643  spin_lock_irqsave(&pmu_lock, flags);
1644  if (pmu_state == locked)
1645  pmu_state = idle;
1646  adb_int_pending = 1;
1647  spin_unlock_irqrestore(&pmu_lock, flags);
1648 }
1649 
1650 
1651 static irqreturn_t
1652 gpio1_interrupt(int irq, void *arg)
1653 {
1654  unsigned long flags;
1655 
1656  if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1657  spin_lock_irqsave(&pmu_lock, flags);
1658  if (gpio_irq_enabled > 0) {
1659  disable_irq_nosync(gpio_irq);
1660  gpio_irq_enabled = 0;
1661  }
1662  pmu_irq_stats[1]++;
1663  adb_int_pending = 1;
1664  spin_unlock_irqrestore(&pmu_lock, flags);
1665  via_pmu_interrupt(0, NULL);
1666  return IRQ_HANDLED;
1667  }
1668  return IRQ_NONE;
1669 }
1670 
1671 void
1672 pmu_enable_irled(int on)
1673 {
1674  struct adb_request req;
1675 
1676  if (vias == NULL)
1677  return ;
1678  if (pmu_kind == PMU_KEYLARGO_BASED)
1679  return ;
1680 
1681  pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1682  (on ? PMU_POW_ON : PMU_POW_OFF));
1683  pmu_wait_complete(&req);
1684 }
1685 
1686 void
1687 pmu_restart(void)
1688 {
1689  struct adb_request req;
1690 
1691  if (via == NULL)
1692  return;
1693 
1694  local_irq_disable();
1695 
1696  drop_interrupts = 1;
1697 
1698  if (pmu_kind != PMU_KEYLARGO_BASED) {
1699  pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1700  PMU_INT_TICK );
1701  while(!req.complete)
1702  pmu_poll();
1703  }
1704 
1705  pmu_request(&req, NULL, 1, PMU_RESET);
1706  pmu_wait_complete(&req);
1707  for (;;)
1708  ;
1709 }
1710 
1711 void
1712 pmu_shutdown(void)
1713 {
1714  struct adb_request req;
1715 
1716  if (via == NULL)
1717  return;
1718 
1719  local_irq_disable();
1720 
1721  drop_interrupts = 1;
1722 
1723  if (pmu_kind != PMU_KEYLARGO_BASED) {
1724  pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1725  PMU_INT_TICK );
1726  pmu_wait_complete(&req);
1727  } else {
1728  /* Disable server mode on shutdown or we'll just
1729  * wake up again
1730  */
1731  pmu_set_server_mode(0);
1732  }
1733 
1734  pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1735  'M', 'A', 'T', 'T');
1736  pmu_wait_complete(&req);
1737  for (;;)
1738  ;
1739 }
1740 
1741 int
1742 pmu_present(void)
1743 {
1744  return via != 0;
1745 }
1746 
1747 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1748 /*
1749  * Put the powerbook to sleep.
1750  */
1751 
1752 static u32 save_via[8];
1753 
1754 static void
1755 save_via_state(void)
1756 {
1757  save_via[0] = in_8(&via[ANH]);
1758  save_via[1] = in_8(&via[DIRA]);
1759  save_via[2] = in_8(&via[B]);
1760  save_via[3] = in_8(&via[DIRB]);
1761  save_via[4] = in_8(&via[PCR]);
1762  save_via[5] = in_8(&via[ACR]);
1763  save_via[6] = in_8(&via[T1CL]);
1764  save_via[7] = in_8(&via[T1CH]);
1765 }
1766 static void
1767 restore_via_state(void)
1768 {
1769  out_8(&via[ANH], save_via[0]);
1770  out_8(&via[DIRA], save_via[1]);
1771  out_8(&via[B], save_via[2]);
1772  out_8(&via[DIRB], save_via[3]);
1773  out_8(&via[PCR], save_via[4]);
1774  out_8(&via[ACR], save_via[5]);
1775  out_8(&via[T1CL], save_via[6]);
1776  out_8(&via[T1CH], save_via[7]);
1777  out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
1778  out_8(&via[IFR], 0x7f); /* clear IFR */
1779  out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1780 }
1781 
1782 #define GRACKLE_PM (1<<7)
1783 #define GRACKLE_DOZE (1<<5)
1784 #define GRACKLE_NAP (1<<4)
1785 #define GRACKLE_SLEEP (1<<3)
1786 
1787 static int powerbook_sleep_grackle(void)
1788 {
1789  unsigned long save_l2cr;
1790  unsigned short pmcr1;
1791  struct adb_request req;
1792  struct pci_dev *grackle;
1793 
1794  grackle = pci_get_bus_and_slot(0, 0);
1795  if (!grackle)
1796  return -ENODEV;
1797 
1798  /* Turn off various things. Darwin does some retry tests here... */
1799  pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1800  pmu_wait_complete(&req);
1801  pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1802  PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1803  pmu_wait_complete(&req);
1804 
1805  /* For 750, save backside cache setting and disable it */
1806  save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1807 
1808  if (!__fake_sleep) {
1809  /* Ask the PMU to put us to sleep */
1810  pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1811  pmu_wait_complete(&req);
1812  }
1813 
1814  /* The VIA is supposed not to be restored correctly*/
1815  save_via_state();
1816  /* We shut down some HW */
1817  pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1818 
1819  pci_read_config_word(grackle, 0x70, &pmcr1);
1820  /* Apparently, MacOS uses NAP mode for Grackle ??? */
1821  pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1822  pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1823  pci_write_config_word(grackle, 0x70, pmcr1);
1824 
1825  /* Call low-level ASM sleep handler */
1826  if (__fake_sleep)
1827  mdelay(5000);
1828  else
1829  low_sleep_handler();
1830 
1831  /* We're awake again, stop grackle PM */
1832  pci_read_config_word(grackle, 0x70, &pmcr1);
1833  pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1834  pci_write_config_word(grackle, 0x70, pmcr1);
1835 
1836  pci_dev_put(grackle);
1837 
1838  /* Make sure the PMU is idle */
1839  pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1840  restore_via_state();
1841 
1842  /* Restore L2 cache */
1843  if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1844  _set_L2CR(save_l2cr);
1845 
1846  /* Restore userland MMU context */
1847  switch_mmu_context(NULL, current->active_mm);
1848 
1849  /* Power things up */
1850  pmu_unlock();
1851  pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1852  pmu_wait_complete(&req);
1853  pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1854  PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1855  pmu_wait_complete(&req);
1856  pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1857  PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1858  pmu_wait_complete(&req);
1859 
1860  return 0;
1861 }
1862 
1863 static int
1864 powerbook_sleep_Core99(void)
1865 {
1866  unsigned long save_l2cr;
1867  unsigned long save_l3cr;
1868  struct adb_request req;
1869 
1870  if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1871  printk(KERN_ERR "Sleep mode not supported on this machine\n");
1872  return -ENOSYS;
1873  }
1874 
1875  if (num_online_cpus() > 1 || cpu_is_offline(0))
1876  return -EAGAIN;
1877 
1878  /* Stop environment and ADB interrupts */
1879  pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1880  pmu_wait_complete(&req);
1881 
1882  /* Tell PMU what events will wake us up */
1883  pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1884  0xff, 0xff);
1885  pmu_wait_complete(&req);
1886  pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1887  0, PMU_PWR_WAKEUP_KEY |
1888  (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1889  pmu_wait_complete(&req);
1890 
1891  /* Save the state of the L2 and L3 caches */
1892  save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
1893  save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1894 
1895  if (!__fake_sleep) {
1896  /* Ask the PMU to put us to sleep */
1897  pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1898  pmu_wait_complete(&req);
1899  }
1900 
1901  /* The VIA is supposed not to be restored correctly*/
1902  save_via_state();
1903 
1904  /* Shut down various ASICs. There's a chance that we can no longer
1905  * talk to the PMU after this, so I moved it to _after_ sending the
1906  * sleep command to it. Still need to be checked.
1907  */
1908  pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1909 
1910  /* Call low-level ASM sleep handler */
1911  if (__fake_sleep)
1912  mdelay(5000);
1913  else
1914  low_sleep_handler();
1915 
1916  /* Restore Apple core ASICs state */
1917  pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1918 
1919  /* Restore VIA */
1920  restore_via_state();
1921 
1922  /* tweak LPJ before cpufreq is there */
1923  loops_per_jiffy *= 2;
1924 
1925  /* Restore video */
1926  pmac_call_early_video_resume();
1927 
1928  /* Restore L2 cache */
1929  if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1930  _set_L2CR(save_l2cr);
1931  /* Restore L3 cache */
1932  if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1933  _set_L3CR(save_l3cr);
1934 
1935  /* Restore userland MMU context */
1936  switch_mmu_context(NULL, current->active_mm);
1937 
1938  /* Tell PMU we are ready */
1939  pmu_unlock();
1940  pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1941  pmu_wait_complete(&req);
1942  pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1943  pmu_wait_complete(&req);
1944 
1945  /* Restore LPJ, cpufreq will adjust the cpu frequency */
1946  loops_per_jiffy /= 2;
1947 
1948  return 0;
1949 }
1950 
1951 #define PB3400_MEM_CTRL 0xf8000000
1952 #define PB3400_MEM_CTRL_SLEEP 0x70
1953 
1954 static void __iomem *pb3400_mem_ctrl;
1955 
1956 static void powerbook_sleep_init_3400(void)
1957 {
1958  /* map in the memory controller registers */
1959  pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1960  if (pb3400_mem_ctrl == NULL)
1961  printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1962 }
1963 
1964 static int powerbook_sleep_3400(void)
1965 {
1966  int i, x;
1967  unsigned int hid0;
1968  unsigned long msr;
1969  struct adb_request sleep_req;
1970  unsigned int __iomem *mem_ctrl_sleep;
1971 
1972  if (pb3400_mem_ctrl == NULL)
1973  return -ENOMEM;
1974  mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1975 
1976  /* Set the memory controller to keep the memory refreshed
1977  while we're asleep */
1978  for (i = 0x403f; i >= 0x4000; --i) {
1979  out_be32(mem_ctrl_sleep, i);
1980  do {
1981  x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1982  } while (x == 0);
1983  if (x >= 0x100)
1984  break;
1985  }
1986 
1987  /* Ask the PMU to put us to sleep */
1988  pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1989  pmu_wait_complete(&sleep_req);
1990  pmu_unlock();
1991 
1992  pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1993 
1994  asleep = 1;
1995 
1996  /* Put the CPU into sleep mode */
1997  hid0 = mfspr(SPRN_HID0);
1998  hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
1999  mtspr(SPRN_HID0, hid0);
2000  local_irq_enable();
2001  msr = mfmsr() | MSR_POW;
2002  while (asleep) {
2003  mb();
2004  mtmsr(msr);
2005  isync();
2006  }
2007  local_irq_disable();
2008 
2009  /* OK, we're awake again, start restoring things */
2010  out_be32(mem_ctrl_sleep, 0x3f);
2011  pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2012 
2013  return 0;
2014 }
2015 
2016 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2017 
2018 /*
2019  * Support for /dev/pmu device
2020  */
2021 #define RB_SIZE 0x10
2022 struct pmu_private {
2023  struct list_head list;
2024  int rb_get;
2025  int rb_put;
2026  struct rb_entry {
2027  unsigned short len;
2028  unsigned char data[16];
2029  } rb_buf[RB_SIZE];
2030  wait_queue_head_t wait;
2031  spinlock_t lock;
2032 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2033  int backlight_locker;
2034 #endif
2035 };
2036 
2037 static LIST_HEAD(all_pmu_pvt);
2038 static DEFINE_SPINLOCK(all_pvt_lock);
2039 
2040 static void
2041 pmu_pass_intr(unsigned char *data, int len)
2042 {
2043  struct pmu_private *pp;
2044  struct list_head *list;
2045  int i;
2046  unsigned long flags;
2047 
2048  if (len > sizeof(pp->rb_buf[0].data))
2049  len = sizeof(pp->rb_buf[0].data);
2050  spin_lock_irqsave(&all_pvt_lock, flags);
2051  for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2052  pp = list_entry(list, struct pmu_private, list);
2053  spin_lock(&pp->lock);
2054  i = pp->rb_put + 1;
2055  if (i >= RB_SIZE)
2056  i = 0;
2057  if (i != pp->rb_get) {
2058  struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2059  rp->len = len;
2060  memcpy(rp->data, data, len);
2061  pp->rb_put = i;
2062  wake_up_interruptible(&pp->wait);
2063  }
2064  spin_unlock(&pp->lock);
2065  }
2066  spin_unlock_irqrestore(&all_pvt_lock, flags);
2067 }
2068 
2069 static int
2070 pmu_open(struct inode *inode, struct file *file)
2071 {
2072  struct pmu_private *pp;
2073  unsigned long flags;
2074 
2075  pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2076  if (pp == 0)
2077  return -ENOMEM;
2078  pp->rb_get = pp->rb_put = 0;
2079  spin_lock_init(&pp->lock);
2080  init_waitqueue_head(&pp->wait);
2081  mutex_lock(&pmu_info_proc_mutex);
2082  spin_lock_irqsave(&all_pvt_lock, flags);
2083 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2084  pp->backlight_locker = 0;
2085 #endif
2086  list_add(&pp->list, &all_pmu_pvt);
2087  spin_unlock_irqrestore(&all_pvt_lock, flags);
2088  file->private_data = pp;
2089  mutex_unlock(&pmu_info_proc_mutex);
2090  return 0;
2091 }
2092 
2093 static ssize_t
2094 pmu_read(struct file *file, char __user *buf,
2095  size_t count, loff_t *ppos)
2096 {
2097  struct pmu_private *pp = file->private_data;
2098  DECLARE_WAITQUEUE(wait, current);
2099  unsigned long flags;
2100  int ret = 0;
2101 
2102  if (count < 1 || pp == 0)
2103  return -EINVAL;
2104  if (!access_ok(VERIFY_WRITE, buf, count))
2105  return -EFAULT;
2106 
2107  spin_lock_irqsave(&pp->lock, flags);
2108  add_wait_queue(&pp->wait, &wait);
2109  current->state = TASK_INTERRUPTIBLE;
2110 
2111  for (;;) {
2112  ret = -EAGAIN;
2113  if (pp->rb_get != pp->rb_put) {
2114  int i = pp->rb_get;
2115  struct rb_entry *rp = &pp->rb_buf[i];
2116  ret = rp->len;
2117  spin_unlock_irqrestore(&pp->lock, flags);
2118  if (ret > count)
2119  ret = count;
2120  if (ret > 0 && copy_to_user(buf, rp->data, ret))
2121  ret = -EFAULT;
2122  if (++i >= RB_SIZE)
2123  i = 0;
2124  spin_lock_irqsave(&pp->lock, flags);
2125  pp->rb_get = i;
2126  }
2127  if (ret >= 0)
2128  break;
2129  if (file->f_flags & O_NONBLOCK)
2130  break;
2131  ret = -ERESTARTSYS;
2132  if (signal_pending(current))
2133  break;
2134  spin_unlock_irqrestore(&pp->lock, flags);
2135  schedule();
2136  spin_lock_irqsave(&pp->lock, flags);
2137  }
2138  current->state = TASK_RUNNING;
2139  remove_wait_queue(&pp->wait, &wait);
2140  spin_unlock_irqrestore(&pp->lock, flags);
2141 
2142  return ret;
2143 }
2144 
2145 static ssize_t
2146 pmu_write(struct file *file, const char __user *buf,
2147  size_t count, loff_t *ppos)
2148 {
2149  return 0;
2150 }
2151 
2152 static unsigned int
2153 pmu_fpoll(struct file *filp, poll_table *wait)
2154 {
2155  struct pmu_private *pp = filp->private_data;
2156  unsigned int mask = 0;
2157  unsigned long flags;
2158 
2159  if (pp == 0)
2160  return 0;
2161  poll_wait(filp, &pp->wait, wait);
2162  spin_lock_irqsave(&pp->lock, flags);
2163  if (pp->rb_get != pp->rb_put)
2164  mask |= POLLIN;
2165  spin_unlock_irqrestore(&pp->lock, flags);
2166  return mask;
2167 }
2168 
2169 static int
2170 pmu_release(struct inode *inode, struct file *file)
2171 {
2172  struct pmu_private *pp = file->private_data;
2173  unsigned long flags;
2174 
2175  if (pp != 0) {
2176  file->private_data = NULL;
2177  spin_lock_irqsave(&all_pvt_lock, flags);
2178  list_del(&pp->list);
2179  spin_unlock_irqrestore(&all_pvt_lock, flags);
2180 
2181 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2182  if (pp->backlight_locker)
2183  pmac_backlight_enable();
2184 #endif
2185 
2186  kfree(pp);
2187  }
2188  return 0;
2189 }
2190 
2191 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2192 static void pmac_suspend_disable_irqs(void)
2193 {
2194  /* Call platform functions marked "on sleep" */
2195  pmac_pfunc_i2c_suspend();
2196  pmac_pfunc_base_suspend();
2197 }
2198 
2199 static int powerbook_sleep(suspend_state_t state)
2200 {
2201  int error = 0;
2202 
2203  /* Wait for completion of async requests */
2204  while (!batt_req.complete)
2205  pmu_poll();
2206 
2207  /* Giveup the lazy FPU & vec so we don't have to back them
2208  * up from the low level code
2209  */
2210  enable_kernel_fp();
2211 
2212 #ifdef CONFIG_ALTIVEC
2213  if (cpu_has_feature(CPU_FTR_ALTIVEC))
2214  enable_kernel_altivec();
2215 #endif /* CONFIG_ALTIVEC */
2216 
2217  switch (pmu_kind) {
2218  case PMU_OHARE_BASED:
2219  error = powerbook_sleep_3400();
2220  break;
2221  case PMU_HEATHROW_BASED:
2222  case PMU_PADDINGTON_BASED:
2223  error = powerbook_sleep_grackle();
2224  break;
2225  case PMU_KEYLARGO_BASED:
2226  error = powerbook_sleep_Core99();
2227  break;
2228  default:
2229  return -ENOSYS;
2230  }
2231 
2232  if (error)
2233  return error;
2234 
2235  mdelay(100);
2236 
2237  return 0;
2238 }
2239 
2240 static void pmac_suspend_enable_irqs(void)
2241 {
2242  /* Force a poll of ADB interrupts */
2243  adb_int_pending = 1;
2244  via_pmu_interrupt(0, NULL);
2245 
2246  mdelay(10);
2247 
2248  /* Call platform functions marked "on wake" */
2249  pmac_pfunc_base_resume();
2250  pmac_pfunc_i2c_resume();
2251 }
2252 
2253 static int pmu_sleep_valid(suspend_state_t state)
2254 {
2255  return state == PM_SUSPEND_MEM
2256  && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2257 }
2258 
2259 static const struct platform_suspend_ops pmu_pm_ops = {
2260  .enter = powerbook_sleep,
2261  .valid = pmu_sleep_valid,
2262 };
2263 
2264 static int register_pmu_pm_ops(void)
2265 {
2266  if (pmu_kind == PMU_OHARE_BASED)
2267  powerbook_sleep_init_3400();
2268  ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2269  ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2270  suspend_set_ops(&pmu_pm_ops);
2271 
2272  return 0;
2273 }
2274 
2275 device_initcall(register_pmu_pm_ops);
2276 #endif
2277 
2278 static int pmu_ioctl(struct file *filp,
2279  u_int cmd, u_long arg)
2280 {
2281  __u32 __user *argp = (__u32 __user *)arg;
2282  int error = -EINVAL;
2283 
2284  switch (cmd) {
2285  case PMU_IOC_SLEEP:
2286  if (!capable(CAP_SYS_ADMIN))
2287  return -EACCES;
2288  return pm_suspend(PM_SUSPEND_MEM);
2289  case PMU_IOC_CAN_SLEEP:
2290  if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2291  return put_user(0, argp);
2292  else
2293  return put_user(1, argp);
2294 
2295 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2296  /* Compatibility ioctl's for backlight */
2297  case PMU_IOC_GET_BACKLIGHT:
2298  {
2299  int brightness;
2300 
2301  brightness = pmac_backlight_get_legacy_brightness();
2302  if (brightness < 0)
2303  return brightness;
2304  else
2305  return put_user(brightness, argp);
2306 
2307  }
2308  case PMU_IOC_SET_BACKLIGHT:
2309  {
2310  int brightness;
2311 
2312  error = get_user(brightness, argp);
2313  if (error)
2314  return error;
2315 
2316  return pmac_backlight_set_legacy_brightness(brightness);
2317  }
2318 #ifdef CONFIG_INPUT_ADBHID
2319  case PMU_IOC_GRAB_BACKLIGHT: {
2320  struct pmu_private *pp = filp->private_data;
2321 
2322  if (pp->backlight_locker)
2323  return 0;
2324 
2325  pp->backlight_locker = 1;
2326  pmac_backlight_disable();
2327 
2328  return 0;
2329  }
2330 #endif /* CONFIG_INPUT_ADBHID */
2331 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2332 
2333  case PMU_IOC_GET_MODEL:
2334  return put_user(pmu_kind, argp);
2335  case PMU_IOC_HAS_ADB:
2336  return put_user(pmu_has_adb, argp);
2337  }
2338  return error;
2339 }
2340 
2341 static long pmu_unlocked_ioctl(struct file *filp,
2342  u_int cmd, u_long arg)
2343 {
2344  int ret;
2345 
2346  mutex_lock(&pmu_info_proc_mutex);
2347  ret = pmu_ioctl(filp, cmd, arg);
2348  mutex_unlock(&pmu_info_proc_mutex);
2349 
2350  return ret;
2351 }
2352 
2353 #ifdef CONFIG_COMPAT
2354 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2355 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2356 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t)
2357 #define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t)
2358 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t)
2359 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2360 
2361 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2362 {
2363  switch (cmd) {
2364  case PMU_IOC_SLEEP:
2365  break;
2366  case PMU_IOC_GET_BACKLIGHT32:
2367  cmd = PMU_IOC_GET_BACKLIGHT;
2368  break;
2369  case PMU_IOC_SET_BACKLIGHT32:
2370  cmd = PMU_IOC_SET_BACKLIGHT;
2371  break;
2372  case PMU_IOC_GET_MODEL32:
2373  cmd = PMU_IOC_GET_MODEL;
2374  break;
2375  case PMU_IOC_HAS_ADB32:
2376  cmd = PMU_IOC_HAS_ADB;
2377  break;
2378  case PMU_IOC_CAN_SLEEP32:
2379  cmd = PMU_IOC_CAN_SLEEP;
2380  break;
2381  case PMU_IOC_GRAB_BACKLIGHT32:
2382  cmd = PMU_IOC_GRAB_BACKLIGHT;
2383  break;
2384  default:
2385  return -ENOIOCTLCMD;
2386  }
2387  return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2388 }
2389 #endif
2390 
2391 static const struct file_operations pmu_device_fops = {
2392  .read = pmu_read,
2393  .write = pmu_write,
2394  .poll = pmu_fpoll,
2395  .unlocked_ioctl = pmu_unlocked_ioctl,
2396 #ifdef CONFIG_COMPAT
2397  .compat_ioctl = compat_pmu_ioctl,
2398 #endif
2399  .open = pmu_open,
2400  .release = pmu_release,
2401  .llseek = noop_llseek,
2402 };
2403 
2404 static struct miscdevice pmu_device = {
2405  PMU_MINOR, "pmu", &pmu_device_fops
2406 };
2407 
2408 static int pmu_device_init(void)
2409 {
2410  if (!via)
2411  return 0;
2412  if (misc_register(&pmu_device) < 0)
2413  printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2414  return 0;
2415 }
2416 device_initcall(pmu_device_init);
2417 
2418 
2419 #ifdef DEBUG_SLEEP
2420 static inline void
2421 polled_handshake(volatile unsigned char __iomem *via)
2422 {
2423  via[B] &= ~TREQ; eieio();
2424  while ((via[B] & TACK) != 0)
2425  ;
2426  via[B] |= TREQ; eieio();
2427  while ((via[B] & TACK) == 0)
2428  ;
2429 }
2430 
2431 static inline void
2432 polled_send_byte(volatile unsigned char __iomem *via, int x)
2433 {
2434  via[ACR] |= SR_OUT | SR_EXT; eieio();
2435  via[SR] = x; eieio();
2436  polled_handshake(via);
2437 }
2438 
2439 static inline int
2440 polled_recv_byte(volatile unsigned char __iomem *via)
2441 {
2442  int x;
2443 
2444  via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2445  x = via[SR]; eieio();
2446  polled_handshake(via);
2447  x = via[SR]; eieio();
2448  return x;
2449 }
2450 
2451 int
2452 pmu_polled_request(struct adb_request *req)
2453 {
2454  unsigned long flags;
2455  int i, l, c;
2456  volatile unsigned char __iomem *v = via;
2457 
2458  req->complete = 1;
2459  c = req->data[0];
2460  l = pmu_data_len[c][0];
2461  if (l >= 0 && req->nbytes != l + 1)
2462  return -EINVAL;
2463 
2464  local_irq_save(flags);
2465  while (pmu_state != idle)
2466  pmu_poll();
2467 
2468  while ((via[B] & TACK) == 0)
2469  ;
2470  polled_send_byte(v, c);
2471  if (l < 0) {
2472  l = req->nbytes - 1;
2473  polled_send_byte(v, l);
2474  }
2475  for (i = 1; i <= l; ++i)
2476  polled_send_byte(v, req->data[i]);
2477 
2478  l = pmu_data_len[c][1];
2479  if (l < 0)
2480  l = polled_recv_byte(v);
2481  for (i = 0; i < l; ++i)
2482  req->reply[i + req->reply_len] = polled_recv_byte(v);
2483 
2484  if (req->done)
2485  (*req->done)(req);
2486 
2487  local_irq_restore(flags);
2488  return 0;
2489 }
2490 
2491 /* N.B. This doesn't work on the 3400 */
2492 void pmu_blink(int n)
2493 {
2494  struct adb_request req;
2495 
2496  memset(&req, 0, sizeof(req));
2497 
2498  for (; n > 0; --n) {
2499  req.nbytes = 4;
2500  req.done = NULL;
2501  req.data[0] = 0xee;
2502  req.data[1] = 4;
2503  req.data[2] = 0;
2504  req.data[3] = 1;
2505  req.reply[0] = ADB_RET_OK;
2506  req.reply_len = 1;
2507  req.reply_expected = 0;
2508  pmu_polled_request(&req);
2509  mdelay(50);
2510  req.nbytes = 4;
2511  req.done = NULL;
2512  req.data[0] = 0xee;
2513  req.data[1] = 4;
2514  req.data[2] = 0;
2515  req.data[3] = 0;
2516  req.reply[0] = ADB_RET_OK;
2517  req.reply_len = 1;
2518  req.reply_expected = 0;
2519  pmu_polled_request(&req);
2520  mdelay(50);
2521  }
2522  mdelay(50);
2523 }
2524 #endif /* DEBUG_SLEEP */
2525 
2526 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2527 int pmu_sys_suspended;
2528 
2529 static int pmu_syscore_suspend(void)
2530 {
2531  /* Suspend PMU event interrupts */
2532  pmu_suspend();
2533  pmu_sys_suspended = 1;
2534 
2535 #ifdef CONFIG_PMAC_BACKLIGHT
2536  /* Tell backlight code not to muck around with the chip anymore */
2537  pmu_backlight_set_sleep(1);
2538 #endif
2539 
2540  return 0;
2541 }
2542 
2543 static void pmu_syscore_resume(void)
2544 {
2545  struct adb_request req;
2546 
2547  if (!pmu_sys_suspended)
2548  return;
2549 
2550  /* Tell PMU we are ready */
2551  pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2552  pmu_wait_complete(&req);
2553 
2554 #ifdef CONFIG_PMAC_BACKLIGHT
2555  /* Tell backlight code it can use the chip again */
2556  pmu_backlight_set_sleep(0);
2557 #endif
2558  /* Resume PMU event interrupts */
2559  pmu_resume();
2560  pmu_sys_suspended = 0;
2561 }
2562 
2563 static struct syscore_ops pmu_syscore_ops = {
2564  .suspend = pmu_syscore_suspend,
2565  .resume = pmu_syscore_resume,
2566 };
2567 
2568 static int pmu_syscore_register(void)
2569 {
2570  register_syscore_ops(&pmu_syscore_ops);
2571 
2572  return 0;
2573 }
2574 subsys_initcall(pmu_syscore_register);
2575 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2576 
2577 EXPORT_SYMBOL(pmu_request);
2578 EXPORT_SYMBOL(pmu_queue_request);
2579 EXPORT_SYMBOL(pmu_poll);
2580 EXPORT_SYMBOL(pmu_poll_adb);
2581 EXPORT_SYMBOL(pmu_wait_complete);
2582 EXPORT_SYMBOL(pmu_suspend);
2583 EXPORT_SYMBOL(pmu_resume);
2584 EXPORT_SYMBOL(pmu_unlock);
2585 #if defined(CONFIG_PPC32)
2586 EXPORT_SYMBOL(pmu_enable_irled);
2587 EXPORT_SYMBOL(pmu_battery_count);
2588 EXPORT_SYMBOL(pmu_batteries);
2589 EXPORT_SYMBOL(pmu_power_flags);
2590 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2591 
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