[PATCH] powerpc: via-pmu warning fix
[linux-2.6.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/pmac_pfunc.h>
59 #include <asm/pmac_low_i2c.h>
60 #include <asm/uaccess.h>
61 #include <asm/mmu_context.h>
62 #include <asm/cputable.h>
63 #include <asm/time.h>
64 #ifdef CONFIG_PMAC_BACKLIGHT
65 #include <asm/backlight.h>
66 #endif
67
68 #ifdef CONFIG_PPC32
69 #include <asm/open_pic.h>
70 #endif
71
72 /* Some compile options */
73 #undef SUSPEND_USES_PMU
74 #define DEBUG_SLEEP
75 #undef HACKED_PCI_SAVE
76
77 /* Misc minor number allocated for /dev/pmu */
78 #define PMU_MINOR               154
79
80 /* How many iterations between battery polls */
81 #define BATTERY_POLLING_COUNT   2
82
83 static volatile unsigned char __iomem *via;
84
85 /* VIA registers - spaced 0x200 bytes apart */
86 #define RS              0x200           /* skip between registers */
87 #define B               0               /* B-side data */
88 #define A               RS              /* A-side data */
89 #define DIRB            (2*RS)          /* B-side direction (1=output) */
90 #define DIRA            (3*RS)          /* A-side direction (1=output) */
91 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
92 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
93 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
94 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
95 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
96 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
97 #define SR              (10*RS)         /* Shift register */
98 #define ACR             (11*RS)         /* Auxiliary control register */
99 #define PCR             (12*RS)         /* Peripheral control register */
100 #define IFR             (13*RS)         /* Interrupt flag register */
101 #define IER             (14*RS)         /* Interrupt enable register */
102 #define ANH             (15*RS)         /* A-side data, no handshake */
103
104 /* Bits in B data register: both active low */
105 #define TACK            0x08            /* Transfer acknowledge (input) */
106 #define TREQ            0x10            /* Transfer request (output) */
107
108 /* Bits in ACR */
109 #define SR_CTRL         0x1c            /* Shift register control bits */
110 #define SR_EXT          0x0c            /* Shift on external clock */
111 #define SR_OUT          0x10            /* Shift out if 1 */
112
113 /* Bits in IFR and IER */
114 #define IER_SET         0x80            /* set bits in IER */
115 #define IER_CLR         0               /* clear bits in IER */
116 #define SR_INT          0x04            /* Shift register full/empty */
117 #define CB2_INT         0x08
118 #define CB1_INT         0x10            /* transition on CB1 input */
119
120 static volatile enum pmu_state {
121         idle,
122         sending,
123         intack,
124         reading,
125         reading_intr,
126         locked,
127 } pmu_state;
128
129 static volatile enum int_data_state {
130         int_data_empty,
131         int_data_fill,
132         int_data_ready,
133         int_data_flush
134 } int_data_state[2] = { int_data_empty, int_data_empty };
135
136 static struct adb_request *current_req;
137 static struct adb_request *last_req;
138 static struct adb_request *req_awaiting_reply;
139 static unsigned char interrupt_data[2][32];
140 static int interrupt_data_len[2];
141 static int int_data_last;
142 static unsigned char *reply_ptr;
143 static int data_index;
144 static int data_len;
145 static volatile int adb_int_pending;
146 static volatile int disable_poll;
147 static struct adb_request bright_req_1, bright_req_2;
148 static struct device_node *vias;
149 static int pmu_kind = PMU_UNKNOWN;
150 static int pmu_fully_inited = 0;
151 static int pmu_has_adb;
152 static struct device_node *gpio_node;
153 static unsigned char __iomem *gpio_reg = NULL;
154 static int gpio_irq = -1;
155 static int gpio_irq_enabled = -1;
156 static volatile int pmu_suspended = 0;
157 static spinlock_t pmu_lock;
158 static u8 pmu_intr_mask;
159 static int pmu_version;
160 static int drop_interrupts;
161 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
162 static int option_lid_wakeup = 1;
163 #endif /* CONFIG_PM && CONFIG_PPC32 */
164 #if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT)
165 static int sleep_in_progress;
166 #endif
167 static unsigned long async_req_locks;
168 static unsigned int pmu_irq_stats[11];
169
170 static struct proc_dir_entry *proc_pmu_root;
171 static struct proc_dir_entry *proc_pmu_info;
172 static struct proc_dir_entry *proc_pmu_irqstats;
173 static struct proc_dir_entry *proc_pmu_options;
174 static int option_server_mode;
175
176 int pmu_battery_count;
177 int pmu_cur_battery;
178 unsigned int pmu_power_flags;
179 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
180 static int query_batt_timer = BATTERY_POLLING_COUNT;
181 static struct adb_request batt_req;
182 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
183
184 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
185 extern int disable_kernel_backlight;
186 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
187
188 int __fake_sleep;
189 int asleep;
190 struct notifier_block *sleep_notifier_list;
191
192 #ifdef CONFIG_ADB
193 static int adb_dev_map = 0;
194 static int pmu_adb_flags;
195
196 static int pmu_probe(void);
197 static int pmu_init(void);
198 static int pmu_send_request(struct adb_request *req, int sync);
199 static int pmu_adb_autopoll(int devs);
200 static int pmu_adb_reset_bus(void);
201 #endif /* CONFIG_ADB */
202
203 static int init_pmu(void);
204 static void pmu_start(void);
205 static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
206 static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
207 static int proc_get_info(char *page, char **start, off_t off,
208                           int count, int *eof, void *data);
209 static int proc_get_irqstats(char *page, char **start, off_t off,
210                           int count, int *eof, void *data);
211 #ifdef CONFIG_PMAC_BACKLIGHT
212 static int pmu_set_backlight_level(int level, void* data);
213 static int pmu_set_backlight_enable(int on, int level, void* data);
214 #endif /* CONFIG_PMAC_BACKLIGHT */
215 static void pmu_pass_intr(unsigned char *data, int len);
216 static int proc_get_batt(char *page, char **start, off_t off,
217                         int count, int *eof, void *data);
218 static int proc_read_options(char *page, char **start, off_t off,
219                         int count, int *eof, void *data);
220 static int proc_write_options(struct file *file, const char __user *buffer,
221                         unsigned long count, void *data);
222
223 #ifdef CONFIG_ADB
224 struct adb_driver via_pmu_driver = {
225         "PMU",
226         pmu_probe,
227         pmu_init,
228         pmu_send_request,
229         pmu_adb_autopoll,
230         pmu_poll_adb,
231         pmu_adb_reset_bus
232 };
233 #endif /* CONFIG_ADB */
234
235 extern void low_sleep_handler(void);
236 extern void enable_kernel_altivec(void);
237 extern void enable_kernel_fp(void);
238
239 #ifdef DEBUG_SLEEP
240 int pmu_polled_request(struct adb_request *req);
241 int pmu_wink(struct adb_request *req);
242 #endif
243
244 /*
245  * This table indicates for each PMU opcode:
246  * - the number of data bytes to be sent with the command, or -1
247  *   if a length byte should be sent,
248  * - the number of response bytes which the PMU will return, or
249  *   -1 if it will send a length byte.
250  */
251 static const s8 pmu_data_len[256][2] = {
252 /*         0       1       2       3       4       5       6       7  */
253 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
254 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
255 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
256 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
257 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
258 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
259 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
260 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
261 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
262 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
263 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
264 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
265 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
266 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
267 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
268 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
269 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
270 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
271 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
272 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
273 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
274 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
275 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
276 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
277 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
278 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
279 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
280 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
281 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
282 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
283 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
284 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
285 };
286
287 static char *pbook_type[] = {
288         "Unknown PowerBook",
289         "PowerBook 2400/3400/3500(G3)",
290         "PowerBook G3 Series",
291         "1999 PowerBook G3",
292         "Core99"
293 };
294
295 #ifdef CONFIG_PMAC_BACKLIGHT
296 static struct backlight_controller pmu_backlight_controller = {
297         pmu_set_backlight_enable,
298         pmu_set_backlight_level
299 };
300 #endif /* CONFIG_PMAC_BACKLIGHT */
301
302 int __init find_via_pmu(void)
303 {
304         u64 taddr;
305         u32 *reg;
306
307         if (via != 0)
308                 return 1;
309         vias = of_find_node_by_name(NULL, "via-pmu");
310         if (vias == NULL)
311                 return 0;
312
313         reg = (u32 *)get_property(vias, "reg", NULL);
314         if (reg == NULL) {
315                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
316                 goto fail;
317         }
318         taddr = of_translate_address(vias, reg);
319         if (taddr == OF_BAD_ADDR) {
320                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
321                 goto fail;
322         }
323
324         spin_lock_init(&pmu_lock);
325
326         pmu_has_adb = 1;
327
328         pmu_intr_mask = PMU_INT_PCEJECT |
329                         PMU_INT_SNDBRT |
330                         PMU_INT_ADB |
331                         PMU_INT_TICK;
332         
333         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
334             || device_is_compatible(vias->parent, "ohare")))
335                 pmu_kind = PMU_OHARE_BASED;
336         else if (device_is_compatible(vias->parent, "paddington"))
337                 pmu_kind = PMU_PADDINGTON_BASED;
338         else if (device_is_compatible(vias->parent, "heathrow"))
339                 pmu_kind = PMU_HEATHROW_BASED;
340         else if (device_is_compatible(vias->parent, "Keylargo")
341                  || device_is_compatible(vias->parent, "K2-Keylargo")) {
342                 struct device_node *gpiop;
343                 u64 gaddr = OF_BAD_ADDR;
344
345                 pmu_kind = PMU_KEYLARGO_BASED;
346                 pmu_has_adb = (find_type_devices("adb") != NULL);
347                 pmu_intr_mask = PMU_INT_PCEJECT |
348                                 PMU_INT_SNDBRT |
349                                 PMU_INT_ADB |
350                                 PMU_INT_TICK |
351                                 PMU_INT_ENVIRONMENT;
352                 
353                 gpiop = of_find_node_by_name(NULL, "gpio");
354                 if (gpiop) {
355                         reg = (u32 *)get_property(gpiop, "reg", NULL);
356                         if (reg)
357                                 gaddr = of_translate_address(gpiop, reg);
358                         if (gaddr != OF_BAD_ADDR)
359                                 gpio_reg = ioremap(gaddr, 0x10);
360                 }
361                 if (gpio_reg == NULL)
362                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
363         } else
364                 pmu_kind = PMU_UNKNOWN;
365
366         via = ioremap(taddr, 0x2000);
367         if (via == NULL) {
368                 printk(KERN_ERR "via-pmu: Can't map address !\n");
369                 goto fail;
370         }
371         
372         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
373         out_8(&via[IFR], 0x7f);                 /* clear IFR */
374
375         pmu_state = idle;
376
377         if (!init_pmu()) {
378                 via = NULL;
379                 return 0;
380         }
381
382         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
383                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
384                
385         sys_ctrler = SYS_CTRLER_PMU;
386         
387         return 1;
388  fail:
389         of_node_put(vias);
390         vias = NULL;
391         return 0;
392 }
393
394 #ifdef CONFIG_ADB
395 static int pmu_probe(void)
396 {
397         return vias == NULL? -ENODEV: 0;
398 }
399
400 static int __init pmu_init(void)
401 {
402         if (vias == NULL)
403                 return -ENODEV;
404         return 0;
405 }
406 #endif /* CONFIG_ADB */
407
408 /*
409  * We can't wait until pmu_init gets called, that happens too late.
410  * It happens after IDE and SCSI initialization, which can take a few
411  * seconds, and by that time the PMU could have given up on us and
412  * turned us off.
413  * Thus this is called with arch_initcall rather than device_initcall.
414  */
415 static int __init via_pmu_start(void)
416 {
417         if (vias == NULL)
418                 return -ENODEV;
419
420         bright_req_1.complete = 1;
421         bright_req_2.complete = 1;
422         batt_req.complete = 1;
423
424 #ifndef CONFIG_PPC_MERGE
425         if (pmu_kind == PMU_KEYLARGO_BASED)
426                 openpic_set_irq_priority(vias->intrs[0].line,
427                                          OPENPIC_PRIORITY_DEFAULT + 1);
428 #endif
429
430         if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU",
431                         (void *)0)) {
432                 printk(KERN_ERR "VIA-PMU: can't get irq %d\n",
433                        vias->intrs[0].line);
434                 return -EAGAIN;
435         }
436
437         if (pmu_kind == PMU_KEYLARGO_BASED) {
438                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
439                 if (gpio_node == NULL)
440                         gpio_node = of_find_node_by_name(NULL,
441                                                          "pmu-interrupt");
442                 if (gpio_node && gpio_node->n_intrs > 0)
443                         gpio_irq = gpio_node->intrs[0].line;
444
445                 if (gpio_irq != -1) {
446                         if (request_irq(gpio_irq, gpio1_interrupt, 0,
447                                         "GPIO1 ADB", (void *)0))
448                                 printk(KERN_ERR "pmu: can't get irq %d"
449                                        " (GPIO1)\n", gpio_irq);
450                         else
451                                 gpio_irq_enabled = 1;
452                 }
453         }
454
455         /* Enable interrupts */
456         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
457
458         pmu_fully_inited = 1;
459
460         /* Make sure PMU settle down before continuing. This is _very_ important
461          * since the IDE probe may shut interrupts down for quite a bit of time. If
462          * a PMU communication is pending while this happens, the PMU may timeout
463          * Not that on Core99 machines, the PMU keeps sending us environement
464          * messages, we should find a way to either fix IDE or make it call
465          * pmu_suspend() before masking interrupts. This can also happens while
466          * scolling with some fbdevs.
467          */
468         do {
469                 pmu_poll();
470         } while (pmu_state != idle);
471
472         return 0;
473 }
474
475 arch_initcall(via_pmu_start);
476
477 /*
478  * This has to be done after pci_init, which is a subsys_initcall.
479  */
480 static int __init via_pmu_dev_init(void)
481 {
482         if (vias == NULL)
483                 return -ENODEV;
484
485 #ifdef CONFIG_PMAC_BACKLIGHT
486         /* Enable backlight */
487         register_backlight_controller(&pmu_backlight_controller, NULL, "pmu");
488 #endif /* CONFIG_PMAC_BACKLIGHT */
489
490 #ifdef CONFIG_PPC32
491         if (machine_is_compatible("AAPL,3400/2400") ||
492                 machine_is_compatible("AAPL,3500")) {
493                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
494                         NULL, PMAC_MB_INFO_MODEL, 0);
495                 pmu_battery_count = 1;
496                 if (mb == PMAC_TYPE_COMET)
497                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
498                 else
499                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
500         } else if (machine_is_compatible("AAPL,PowerBook1998") ||
501                 machine_is_compatible("PowerBook1,1")) {
502                 pmu_battery_count = 2;
503                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
504                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
505         } else {
506                 struct device_node* prim = find_devices("power-mgt");
507                 u32 *prim_info = NULL;
508                 if (prim)
509                         prim_info = (u32 *)get_property(prim, "prim-info", NULL);
510                 if (prim_info) {
511                         /* Other stuffs here yet unknown */
512                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
513                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
514                         if (pmu_battery_count > 1)
515                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
516                 }
517         }
518 #endif /* CONFIG_PPC32 */
519
520         /* Create /proc/pmu */
521         proc_pmu_root = proc_mkdir("pmu", NULL);
522         if (proc_pmu_root) {
523                 long i;
524
525                 for (i=0; i<pmu_battery_count; i++) {
526                         char title[16];
527                         sprintf(title, "battery_%ld", i);
528                         proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
529                                                 proc_get_batt, (void *)i);
530                 }
531
532                 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
533                                         proc_get_info, NULL);
534                 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
535                                         proc_get_irqstats, NULL);
536                 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
537                 if (proc_pmu_options) {
538                         proc_pmu_options->nlink = 1;
539                         proc_pmu_options->read_proc = proc_read_options;
540                         proc_pmu_options->write_proc = proc_write_options;
541                 }
542         }
543         return 0;
544 }
545
546 device_initcall(via_pmu_dev_init);
547
548 static int
549 init_pmu(void)
550 {
551         int timeout;
552         struct adb_request req;
553
554         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
555         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
556
557         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
558         timeout =  100000;
559         while (!req.complete) {
560                 if (--timeout < 0) {
561                         printk(KERN_ERR "init_pmu: no response from PMU\n");
562                         return 0;
563                 }
564                 udelay(10);
565                 pmu_poll();
566         }
567
568         /* ack all pending interrupts */
569         timeout = 100000;
570         interrupt_data[0][0] = 1;
571         while (interrupt_data[0][0] || pmu_state != idle) {
572                 if (--timeout < 0) {
573                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
574                         return 0;
575                 }
576                 if (pmu_state == idle)
577                         adb_int_pending = 1;
578                 via_pmu_interrupt(0, NULL, NULL);
579                 udelay(10);
580         }
581
582         /* Tell PMU we are ready.  */
583         if (pmu_kind == PMU_KEYLARGO_BASED) {
584                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
585                 while (!req.complete)
586                         pmu_poll();
587         }
588
589         /* Read PMU version */
590         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
591         pmu_wait_complete(&req);
592         if (req.reply_len > 0)
593                 pmu_version = req.reply[0];
594         
595         /* Read server mode setting */
596         if (pmu_kind == PMU_KEYLARGO_BASED) {
597                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
598                             PMU_PWR_GET_POWERUP_EVENTS);
599                 pmu_wait_complete(&req);
600                 if (req.reply_len == 2) {
601                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
602                                 option_server_mode = 1;
603                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
604                                option_server_mode ? "enabled" : "disabled");
605                 }
606         }
607         return 1;
608 }
609
610 int
611 pmu_get_model(void)
612 {
613         return pmu_kind;
614 }
615
616 static void pmu_set_server_mode(int server_mode)
617 {
618         struct adb_request req;
619
620         if (pmu_kind != PMU_KEYLARGO_BASED)
621                 return;
622
623         option_server_mode = server_mode;
624         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
625         pmu_wait_complete(&req);
626         if (req.reply_len < 2)
627                 return;
628         if (server_mode)
629                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
630                             PMU_PWR_SET_POWERUP_EVENTS,
631                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 
632         else
633                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
634                             PMU_PWR_CLR_POWERUP_EVENTS,
635                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 
636         pmu_wait_complete(&req);
637 }
638
639 /* This new version of the code for 2400/3400/3500 powerbooks
640  * is inspired from the implementation in gkrellm-pmu
641  */
642 static void
643 done_battery_state_ohare(struct adb_request* req)
644 {
645         /* format:
646          *  [0]    :  flags
647          *    0x01 :  AC indicator
648          *    0x02 :  charging
649          *    0x04 :  battery exist
650          *    0x08 :  
651          *    0x10 :  
652          *    0x20 :  full charged
653          *    0x40 :  pcharge reset
654          *    0x80 :  battery exist
655          *
656          *  [1][2] :  battery voltage
657          *  [3]    :  CPU temperature
658          *  [4]    :  battery temperature
659          *  [5]    :  current
660          *  [6][7] :  pcharge
661          *              --tkoba
662          */
663         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
664         long pcharge, charge, vb, vmax, lmax;
665         long vmax_charging, vmax_charged;
666         long amperage, voltage, time, max;
667         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
668                         NULL, PMAC_MB_INFO_MODEL, 0);
669
670         if (req->reply[0] & 0x01)
671                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
672         else
673                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
674         
675         if (mb == PMAC_TYPE_COMET) {
676                 vmax_charged = 189;
677                 vmax_charging = 213;
678                 lmax = 6500;
679         } else {
680                 vmax_charged = 330;
681                 vmax_charging = 330;
682                 lmax = 6500;
683         }
684         vmax = vmax_charged;
685
686         /* If battery installed */
687         if (req->reply[0] & 0x04) {
688                 bat_flags |= PMU_BATT_PRESENT;
689                 if (req->reply[0] & 0x02)
690                         bat_flags |= PMU_BATT_CHARGING;
691                 vb = (req->reply[1] << 8) | req->reply[2];
692                 voltage = (vb * 265 + 72665) / 10;
693                 amperage = req->reply[5];
694                 if ((req->reply[0] & 0x01) == 0) {
695                         if (amperage > 200)
696                                 vb += ((amperage - 200) * 15)/100;
697                 } else if (req->reply[0] & 0x02) {
698                         vb = (vb * 97) / 100;
699                         vmax = vmax_charging;
700                 }
701                 charge = (100 * vb) / vmax;
702                 if (req->reply[0] & 0x40) {
703                         pcharge = (req->reply[6] << 8) + req->reply[7];
704                         if (pcharge > lmax)
705                                 pcharge = lmax;
706                         pcharge *= 100;
707                         pcharge = 100 - pcharge / lmax;
708                         if (pcharge < charge)
709                                 charge = pcharge;
710                 }
711                 if (amperage > 0)
712                         time = (charge * 16440) / amperage;
713                 else
714                         time = 0;
715                 max = 100;
716                 amperage = -amperage;
717         } else
718                 charge = max = amperage = voltage = time = 0;
719
720         pmu_batteries[pmu_cur_battery].flags = bat_flags;
721         pmu_batteries[pmu_cur_battery].charge = charge;
722         pmu_batteries[pmu_cur_battery].max_charge = max;
723         pmu_batteries[pmu_cur_battery].amperage = amperage;
724         pmu_batteries[pmu_cur_battery].voltage = voltage;
725         pmu_batteries[pmu_cur_battery].time_remaining = time;
726
727         clear_bit(0, &async_req_locks);
728 }
729
730 static void
731 done_battery_state_smart(struct adb_request* req)
732 {
733         /* format:
734          *  [0] : format of this structure (known: 3,4,5)
735          *  [1] : flags
736          *  
737          *  format 3 & 4:
738          *  
739          *  [2] : charge
740          *  [3] : max charge
741          *  [4] : current
742          *  [5] : voltage
743          *  
744          *  format 5:
745          *  
746          *  [2][3] : charge
747          *  [4][5] : max charge
748          *  [6][7] : current
749          *  [8][9] : voltage
750          */
751          
752         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
753         int amperage;
754         unsigned int capa, max, voltage;
755         
756         if (req->reply[1] & 0x01)
757                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
758         else
759                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
760
761
762         capa = max = amperage = voltage = 0;
763         
764         if (req->reply[1] & 0x04) {
765                 bat_flags |= PMU_BATT_PRESENT;
766                 switch(req->reply[0]) {
767                         case 3:
768                         case 4: capa = req->reply[2];
769                                 max = req->reply[3];
770                                 amperage = *((signed char *)&req->reply[4]);
771                                 voltage = req->reply[5];
772                                 break;
773                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
774                                 max = (req->reply[4] << 8) | req->reply[5];
775                                 amperage = *((signed short *)&req->reply[6]);
776                                 voltage = (req->reply[8] << 8) | req->reply[9];
777                                 break;
778                         default:
779                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
780                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
781                                 break;
782                 }
783         }
784
785         if ((req->reply[1] & 0x01) && (amperage > 0))
786                 bat_flags |= PMU_BATT_CHARGING;
787
788         pmu_batteries[pmu_cur_battery].flags = bat_flags;
789         pmu_batteries[pmu_cur_battery].charge = capa;
790         pmu_batteries[pmu_cur_battery].max_charge = max;
791         pmu_batteries[pmu_cur_battery].amperage = amperage;
792         pmu_batteries[pmu_cur_battery].voltage = voltage;
793         if (amperage) {
794                 if ((req->reply[1] & 0x01) && (amperage > 0))
795                         pmu_batteries[pmu_cur_battery].time_remaining
796                                 = ((max-capa) * 3600) / amperage;
797                 else
798                         pmu_batteries[pmu_cur_battery].time_remaining
799                                 = (capa * 3600) / (-amperage);
800         } else
801                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
802
803         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
804
805         clear_bit(0, &async_req_locks);
806 }
807
808 static void
809 query_battery_state(void)
810 {
811         if (test_and_set_bit(0, &async_req_locks))
812                 return;
813         if (pmu_kind == PMU_OHARE_BASED)
814                 pmu_request(&batt_req, done_battery_state_ohare,
815                         1, PMU_BATTERY_STATE);
816         else
817                 pmu_request(&batt_req, done_battery_state_smart,
818                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
819 }
820
821 static int
822 proc_get_info(char *page, char **start, off_t off,
823                 int count, int *eof, void *data)
824 {
825         char* p = page;
826
827         p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
828         p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
829         p += sprintf(p, "AC Power               : %d\n",
830                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
831         p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);
832
833         return p - page;
834 }
835
836 static int
837 proc_get_irqstats(char *page, char **start, off_t off,
838                   int count, int *eof, void *data)
839 {
840         int i;
841         char* p = page;
842         static const char *irq_names[] = {
843                 "Total CB1 triggered events",
844                 "Total GPIO1 triggered events",
845                 "PC-Card eject button",
846                 "Sound/Brightness button",
847                 "ADB message",
848                 "Battery state change",
849                 "Environment interrupt",
850                 "Tick timer",
851                 "Ghost interrupt (zero len)",
852                 "Empty interrupt (empty mask)",
853                 "Max irqs in a row"
854         };
855
856         for (i=0; i<11; i++) {
857                 p += sprintf(p, " %2u: %10u (%s)\n",
858                              i, pmu_irq_stats[i], irq_names[i]);
859         }
860         return p - page;
861 }
862
863 static int
864 proc_get_batt(char *page, char **start, off_t off,
865                 int count, int *eof, void *data)
866 {
867         long batnum = (long)data;
868         char *p = page;
869         
870         p += sprintf(p, "\n");
871         p += sprintf(p, "flags      : %08x\n",
872                 pmu_batteries[batnum].flags);
873         p += sprintf(p, "charge     : %d\n",
874                 pmu_batteries[batnum].charge);
875         p += sprintf(p, "max_charge : %d\n",
876                 pmu_batteries[batnum].max_charge);
877         p += sprintf(p, "current    : %d\n",
878                 pmu_batteries[batnum].amperage);
879         p += sprintf(p, "voltage    : %d\n",
880                 pmu_batteries[batnum].voltage);
881         p += sprintf(p, "time rem.  : %d\n",
882                 pmu_batteries[batnum].time_remaining);
883
884         return p - page;
885 }
886
887 static int
888 proc_read_options(char *page, char **start, off_t off,
889                         int count, int *eof, void *data)
890 {
891         char *p = page;
892
893 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
894         if (pmu_kind == PMU_KEYLARGO_BASED &&
895             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
896                 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
897 #endif
898         if (pmu_kind == PMU_KEYLARGO_BASED)
899                 p += sprintf(p, "server_mode=%d\n", option_server_mode);
900
901         return p - page;
902 }
903                         
904 static int
905 proc_write_options(struct file *file, const char __user *buffer,
906                         unsigned long count, void *data)
907 {
908         char tmp[33];
909         char *label, *val;
910         unsigned long fcount = count;
911         
912         if (!count)
913                 return -EINVAL;
914         if (count > 32)
915                 count = 32;
916         if (copy_from_user(tmp, buffer, count))
917                 return -EFAULT;
918         tmp[count] = 0;
919
920         label = tmp;
921         while(*label == ' ')
922                 label++;
923         val = label;
924         while(*val && (*val != '=')) {
925                 if (*val == ' ')
926                         *val = 0;
927                 val++;
928         }
929         if ((*val) == 0)
930                 return -EINVAL;
931         *(val++) = 0;
932         while(*val == ' ')
933                 val++;
934 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
935         if (pmu_kind == PMU_KEYLARGO_BASED &&
936             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
937                 if (!strcmp(label, "lid_wakeup"))
938                         option_lid_wakeup = ((*val) == '1');
939 #endif
940         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
941                 int new_value;
942                 new_value = ((*val) == '1');
943                 if (new_value != option_server_mode)
944                         pmu_set_server_mode(new_value);
945         }
946         return fcount;
947 }
948
949 #ifdef CONFIG_ADB
950 /* Send an ADB command */
951 static int
952 pmu_send_request(struct adb_request *req, int sync)
953 {
954         int i, ret;
955
956         if ((vias == NULL) || (!pmu_fully_inited)) {
957                 req->complete = 1;
958                 return -ENXIO;
959         }
960
961         ret = -EINVAL;
962
963         switch (req->data[0]) {
964         case PMU_PACKET:
965                 for (i = 0; i < req->nbytes - 1; ++i)
966                         req->data[i] = req->data[i+1];
967                 --req->nbytes;
968                 if (pmu_data_len[req->data[0]][1] != 0) {
969                         req->reply[0] = ADB_RET_OK;
970                         req->reply_len = 1;
971                 } else
972                         req->reply_len = 0;
973                 ret = pmu_queue_request(req);
974                 break;
975         case CUDA_PACKET:
976                 switch (req->data[1]) {
977                 case CUDA_GET_TIME:
978                         if (req->nbytes != 2)
979                                 break;
980                         req->data[0] = PMU_READ_RTC;
981                         req->nbytes = 1;
982                         req->reply_len = 3;
983                         req->reply[0] = CUDA_PACKET;
984                         req->reply[1] = 0;
985                         req->reply[2] = CUDA_GET_TIME;
986                         ret = pmu_queue_request(req);
987                         break;
988                 case CUDA_SET_TIME:
989                         if (req->nbytes != 6)
990                                 break;
991                         req->data[0] = PMU_SET_RTC;
992                         req->nbytes = 5;
993                         for (i = 1; i <= 4; ++i)
994                                 req->data[i] = req->data[i+1];
995                         req->reply_len = 3;
996                         req->reply[0] = CUDA_PACKET;
997                         req->reply[1] = 0;
998                         req->reply[2] = CUDA_SET_TIME;
999                         ret = pmu_queue_request(req);
1000                         break;
1001                 }
1002                 break;
1003         case ADB_PACKET:
1004                 if (!pmu_has_adb)
1005                         return -ENXIO;
1006                 for (i = req->nbytes - 1; i > 1; --i)
1007                         req->data[i+2] = req->data[i];
1008                 req->data[3] = req->nbytes - 2;
1009                 req->data[2] = pmu_adb_flags;
1010                 /*req->data[1] = req->data[1];*/
1011                 req->data[0] = PMU_ADB_CMD;
1012                 req->nbytes += 2;
1013                 req->reply_expected = 1;
1014                 req->reply_len = 0;
1015                 ret = pmu_queue_request(req);
1016                 break;
1017         }
1018         if (ret) {
1019                 req->complete = 1;
1020                 return ret;
1021         }
1022
1023         if (sync)
1024                 while (!req->complete)
1025                         pmu_poll();
1026
1027         return 0;
1028 }
1029
1030 /* Enable/disable autopolling */
1031 static int
1032 pmu_adb_autopoll(int devs)
1033 {
1034         struct adb_request req;
1035
1036         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1037                 return -ENXIO;
1038
1039         if (devs) {
1040                 adb_dev_map = devs;
1041                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1042                             adb_dev_map >> 8, adb_dev_map);
1043                 pmu_adb_flags = 2;
1044         } else {
1045                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1046                 pmu_adb_flags = 0;
1047         }
1048         while (!req.complete)
1049                 pmu_poll();
1050         return 0;
1051 }
1052
1053 /* Reset the ADB bus */
1054 static int
1055 pmu_adb_reset_bus(void)
1056 {
1057         struct adb_request req;
1058         int save_autopoll = adb_dev_map;
1059
1060         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1061                 return -ENXIO;
1062
1063         /* anyone got a better idea?? */
1064         pmu_adb_autopoll(0);
1065
1066         req.nbytes = 5;
1067         req.done = NULL;
1068         req.data[0] = PMU_ADB_CMD;
1069         req.data[1] = 0;
1070         req.data[2] = ADB_BUSRESET;
1071         req.data[3] = 0;
1072         req.data[4] = 0;
1073         req.reply_len = 0;
1074         req.reply_expected = 1;
1075         if (pmu_queue_request(&req) != 0) {
1076                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1077                 return -EIO;
1078         }
1079         pmu_wait_complete(&req);
1080
1081         if (save_autopoll != 0)
1082                 pmu_adb_autopoll(save_autopoll);
1083
1084         return 0;
1085 }
1086 #endif /* CONFIG_ADB */
1087
1088 /* Construct and send a pmu request */
1089 int
1090 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1091             int nbytes, ...)
1092 {
1093         va_list list;
1094         int i;
1095
1096         if (vias == NULL)
1097                 return -ENXIO;
1098
1099         if (nbytes < 0 || nbytes > 32) {
1100                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1101                 req->complete = 1;
1102                 return -EINVAL;
1103         }
1104         req->nbytes = nbytes;
1105         req->done = done;
1106         va_start(list, nbytes);
1107         for (i = 0; i < nbytes; ++i)
1108                 req->data[i] = va_arg(list, int);
1109         va_end(list);
1110         req->reply_len = 0;
1111         req->reply_expected = 0;
1112         return pmu_queue_request(req);
1113 }
1114
1115 int
1116 pmu_queue_request(struct adb_request *req)
1117 {
1118         unsigned long flags;
1119         int nsend;
1120
1121         if (via == NULL) {
1122                 req->complete = 1;
1123                 return -ENXIO;
1124         }
1125         if (req->nbytes <= 0) {
1126                 req->complete = 1;
1127                 return 0;
1128         }
1129         nsend = pmu_data_len[req->data[0]][0];
1130         if (nsend >= 0 && req->nbytes != nsend + 1) {
1131                 req->complete = 1;
1132                 return -EINVAL;
1133         }
1134
1135         req->next = NULL;
1136         req->sent = 0;
1137         req->complete = 0;
1138
1139         spin_lock_irqsave(&pmu_lock, flags);
1140         if (current_req != 0) {
1141                 last_req->next = req;
1142                 last_req = req;
1143         } else {
1144                 current_req = req;
1145                 last_req = req;
1146                 if (pmu_state == idle)
1147                         pmu_start();
1148         }
1149         spin_unlock_irqrestore(&pmu_lock, flags);
1150
1151         return 0;
1152 }
1153
1154 static inline void
1155 wait_for_ack(void)
1156 {
1157         /* Sightly increased the delay, I had one occurrence of the message
1158          * reported
1159          */
1160         int timeout = 4000;
1161         while ((in_8(&via[B]) & TACK) == 0) {
1162                 if (--timeout < 0) {
1163                         printk(KERN_ERR "PMU not responding (!ack)\n");
1164                         return;
1165                 }
1166                 udelay(10);
1167         }
1168 }
1169
1170 /* New PMU seems to be very sensitive to those timings, so we make sure
1171  * PCI is flushed immediately */
1172 static inline void
1173 send_byte(int x)
1174 {
1175         volatile unsigned char __iomem *v = via;
1176
1177         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1178         out_8(&v[SR], x);
1179         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1180         (void)in_8(&v[B]);
1181 }
1182
1183 static inline void
1184 recv_byte(void)
1185 {
1186         volatile unsigned char __iomem *v = via;
1187
1188         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1189         in_8(&v[SR]);           /* resets SR */
1190         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1191         (void)in_8(&v[B]);
1192 }
1193
1194 static inline void
1195 pmu_done(struct adb_request *req)
1196 {
1197         void (*done)(struct adb_request *) = req->done;
1198         mb();
1199         req->complete = 1;
1200         /* Here, we assume that if the request has a done member, the
1201          * struct request will survive to setting req->complete to 1
1202          */
1203         if (done)
1204                 (*done)(req);
1205 }
1206
1207 static void
1208 pmu_start(void)
1209 {
1210         struct adb_request *req;
1211
1212         /* assert pmu_state == idle */
1213         /* get the packet to send */
1214         req = current_req;
1215         if (req == 0 || pmu_state != idle
1216             || (/*req->reply_expected && */req_awaiting_reply))
1217                 return;
1218
1219         pmu_state = sending;
1220         data_index = 1;
1221         data_len = pmu_data_len[req->data[0]][0];
1222
1223         /* Sounds safer to make sure ACK is high before writing. This helped
1224          * kill a problem with ADB and some iBooks
1225          */
1226         wait_for_ack();
1227         /* set the shift register to shift out and send a byte */
1228         send_byte(req->data[0]);
1229 }
1230
1231 void
1232 pmu_poll(void)
1233 {
1234         if (!via)
1235                 return;
1236         if (disable_poll)
1237                 return;
1238         via_pmu_interrupt(0, NULL, NULL);
1239 }
1240
1241 void
1242 pmu_poll_adb(void)
1243 {
1244         if (!via)
1245                 return;
1246         if (disable_poll)
1247                 return;
1248         /* Kicks ADB read when PMU is suspended */
1249         adb_int_pending = 1;
1250         do {
1251                 via_pmu_interrupt(0, NULL, NULL);
1252         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1253                 || req_awaiting_reply));
1254 }
1255
1256 void
1257 pmu_wait_complete(struct adb_request *req)
1258 {
1259         if (!via)
1260                 return;
1261         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1262                 via_pmu_interrupt(0, NULL, NULL);
1263 }
1264
1265 /* This function loops until the PMU is idle and prevents it from
1266  * anwsering to ADB interrupts. pmu_request can still be called.
1267  * This is done to avoid spurrious shutdowns when we know we'll have
1268  * interrupts switched off for a long time
1269  */
1270 void
1271 pmu_suspend(void)
1272 {
1273         unsigned long flags;
1274 #ifdef SUSPEND_USES_PMU
1275         struct adb_request *req;
1276 #endif
1277         if (!via)
1278                 return;
1279         
1280         spin_lock_irqsave(&pmu_lock, flags);
1281         pmu_suspended++;
1282         if (pmu_suspended > 1) {
1283                 spin_unlock_irqrestore(&pmu_lock, flags);
1284                 return;
1285         }
1286
1287         do {
1288                 spin_unlock_irqrestore(&pmu_lock, flags);
1289                 if (req_awaiting_reply)
1290                         adb_int_pending = 1;
1291                 via_pmu_interrupt(0, NULL, NULL);
1292                 spin_lock_irqsave(&pmu_lock, flags);
1293                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1294 #ifdef SUSPEND_USES_PMU
1295                         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1296                         spin_unlock_irqrestore(&pmu_lock, flags);
1297                         while(!req.complete)
1298                                 pmu_poll();
1299 #else /* SUSPEND_USES_PMU */
1300                         if (gpio_irq >= 0)
1301                                 disable_irq_nosync(gpio_irq);
1302                         out_8(&via[IER], CB1_INT | IER_CLR);
1303                         spin_unlock_irqrestore(&pmu_lock, flags);
1304 #endif /* SUSPEND_USES_PMU */
1305                         break;
1306                 }
1307         } while (1);
1308 }
1309
1310 void
1311 pmu_resume(void)
1312 {
1313         unsigned long flags;
1314
1315         if (!via || (pmu_suspended < 1))
1316                 return;
1317
1318         spin_lock_irqsave(&pmu_lock, flags);
1319         pmu_suspended--;
1320         if (pmu_suspended > 0) {
1321                 spin_unlock_irqrestore(&pmu_lock, flags);
1322                 return;
1323         }
1324         adb_int_pending = 1;
1325 #ifdef SUSPEND_USES_PMU
1326         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1327         spin_unlock_irqrestore(&pmu_lock, flags);
1328         while(!req.complete)
1329                 pmu_poll();
1330 #else /* SUSPEND_USES_PMU */
1331         if (gpio_irq >= 0)
1332                 enable_irq(gpio_irq);
1333         out_8(&via[IER], CB1_INT | IER_SET);
1334         spin_unlock_irqrestore(&pmu_lock, flags);
1335         pmu_poll();
1336 #endif /* SUSPEND_USES_PMU */
1337 }
1338
1339 /* Interrupt data could be the result data from an ADB cmd */
1340 static void
1341 pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs)
1342 {
1343         unsigned char ints, pirq;
1344         int i = 0;
1345
1346         asleep = 0;
1347         if (drop_interrupts || len < 1) {
1348                 adb_int_pending = 0;
1349                 pmu_irq_stats[8]++;
1350                 return;
1351         }
1352
1353         /* Get PMU interrupt mask */
1354         ints = data[0];
1355
1356         /* Record zero interrupts for stats */
1357         if (ints == 0)
1358                 pmu_irq_stats[9]++;
1359
1360         /* Hack to deal with ADB autopoll flag */
1361         if (ints & PMU_INT_ADB)
1362                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1363
1364 next:
1365
1366         if (ints == 0) {
1367                 if (i > pmu_irq_stats[10])
1368                         pmu_irq_stats[10] = i;
1369                 return;
1370         }
1371
1372         for (pirq = 0; pirq < 8; pirq++)
1373                 if (ints & (1 << pirq))
1374                         break;
1375         pmu_irq_stats[pirq]++;
1376         i++;
1377         ints &= ~(1 << pirq);
1378
1379         /* Note: for some reason, we get an interrupt with len=1,
1380          * data[0]==0 after each normal ADB interrupt, at least
1381          * on the Pismo. Still investigating...  --BenH
1382          */
1383         if ((1 << pirq) & PMU_INT_ADB) {
1384                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1385                         struct adb_request *req = req_awaiting_reply;
1386                         if (req == 0) {
1387                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1388                                 return;
1389                         }
1390                         req_awaiting_reply = NULL;
1391                         if (len <= 2)
1392                                 req->reply_len = 0;
1393                         else {
1394                                 memcpy(req->reply, data + 1, len - 1);
1395                                 req->reply_len = len - 1;
1396                         }
1397                         pmu_done(req);
1398                 } else {
1399                         if (len == 4 && data[1] == 0x2c) {
1400                                 extern int xmon_wants_key, xmon_adb_keycode;
1401                                 if (xmon_wants_key) {
1402                                         xmon_adb_keycode = data[2];
1403                                         return;
1404                                 }
1405                         }
1406 #ifdef CONFIG_ADB
1407                         /*
1408                          * XXX On the [23]400 the PMU gives us an up
1409                          * event for keycodes 0x74 or 0x75 when the PC
1410                          * card eject buttons are released, so we
1411                          * ignore those events.
1412                          */
1413                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1414                               && data[1] == 0x2c && data[3] == 0xff
1415                               && (data[2] & ~1) == 0xf4))
1416                                 adb_input(data+1, len-1, regs, 1);
1417 #endif /* CONFIG_ADB */         
1418                 }
1419         }
1420         /* Sound/brightness button pressed */
1421         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1422 #ifdef CONFIG_PMAC_BACKLIGHT
1423                 if (len == 3)
1424 #ifdef CONFIG_INPUT_ADBHID
1425                         if (!disable_kernel_backlight)
1426 #endif /* CONFIG_INPUT_ADBHID */
1427                                 set_backlight_level(data[1] >> 4);
1428 #endif /* CONFIG_PMAC_BACKLIGHT */
1429         }
1430         /* Tick interrupt */
1431         else if ((1 << pirq) & PMU_INT_TICK) {
1432                 /* Environement or tick interrupt, query batteries */
1433                 if (pmu_battery_count) {
1434                         if ((--query_batt_timer) == 0) {
1435                                 query_battery_state();
1436                                 query_batt_timer = BATTERY_POLLING_COUNT;
1437                         }
1438                 }
1439         }
1440         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1441                 if (pmu_battery_count)
1442                         query_battery_state();
1443                 pmu_pass_intr(data, len);
1444         } else {
1445                pmu_pass_intr(data, len);
1446         }
1447         goto next;
1448 }
1449
1450 static struct adb_request*
1451 pmu_sr_intr(struct pt_regs *regs)
1452 {
1453         struct adb_request *req;
1454         int bite = 0;
1455
1456         if (via[B] & TREQ) {
1457                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1458                 out_8(&via[IFR], SR_INT);
1459                 return NULL;
1460         }
1461         /* The ack may not yet be low when we get the interrupt */
1462         while ((in_8(&via[B]) & TACK) != 0)
1463                         ;
1464
1465         /* if reading grab the byte, and reset the interrupt */
1466         if (pmu_state == reading || pmu_state == reading_intr)
1467                 bite = in_8(&via[SR]);
1468
1469         /* reset TREQ and wait for TACK to go high */
1470         out_8(&via[B], in_8(&via[B]) | TREQ);
1471         wait_for_ack();
1472
1473         switch (pmu_state) {
1474         case sending:
1475                 req = current_req;
1476                 if (data_len < 0) {
1477                         data_len = req->nbytes - 1;
1478                         send_byte(data_len);
1479                         break;
1480                 }
1481                 if (data_index <= data_len) {
1482                         send_byte(req->data[data_index++]);
1483                         break;
1484                 }
1485                 req->sent = 1;
1486                 data_len = pmu_data_len[req->data[0]][1];
1487                 if (data_len == 0) {
1488                         pmu_state = idle;
1489                         current_req = req->next;
1490                         if (req->reply_expected)
1491                                 req_awaiting_reply = req;
1492                         else
1493                                 return req;
1494                 } else {
1495                         pmu_state = reading;
1496                         data_index = 0;
1497                         reply_ptr = req->reply + req->reply_len;
1498                         recv_byte();
1499                 }
1500                 break;
1501
1502         case intack:
1503                 data_index = 0;
1504                 data_len = -1;
1505                 pmu_state = reading_intr;
1506                 reply_ptr = interrupt_data[int_data_last];
1507                 recv_byte();
1508                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1509                         enable_irq(gpio_irq);
1510                         gpio_irq_enabled = 1;
1511                 }
1512                 break;
1513
1514         case reading:
1515         case reading_intr:
1516                 if (data_len == -1) {
1517                         data_len = bite;
1518                         if (bite > 32)
1519                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1520                 } else if (data_index < 32) {
1521                         reply_ptr[data_index++] = bite;
1522                 }
1523                 if (data_index < data_len) {
1524                         recv_byte();
1525                         break;
1526                 }
1527
1528                 if (pmu_state == reading_intr) {
1529                         pmu_state = idle;
1530                         int_data_state[int_data_last] = int_data_ready;
1531                         interrupt_data_len[int_data_last] = data_len;
1532                 } else {
1533                         req = current_req;
1534                         /* 
1535                          * For PMU sleep and freq change requests, we lock the
1536                          * PMU until it's explicitely unlocked. This avoids any
1537                          * spurrious event polling getting in
1538                          */
1539                         current_req = req->next;
1540                         req->reply_len += data_index;
1541                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1542                                 pmu_state = locked;
1543                         else
1544                                 pmu_state = idle;
1545                         return req;
1546                 }
1547                 break;
1548
1549         default:
1550                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1551                        pmu_state);
1552         }
1553         return NULL;
1554 }
1555
1556 static irqreturn_t
1557 via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs)
1558 {
1559         unsigned long flags;
1560         int intr;
1561         int nloop = 0;
1562         int int_data = -1;
1563         struct adb_request *req = NULL;
1564         int handled = 0;
1565
1566         /* This is a bit brutal, we can probably do better */
1567         spin_lock_irqsave(&pmu_lock, flags);
1568         ++disable_poll;
1569         
1570         for (;;) {
1571                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1572                 if (intr == 0)
1573                         break;
1574                 handled = 1;
1575                 if (++nloop > 1000) {
1576                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1577                                "intr=%x, ier=%x pmu_state=%d\n",
1578                                intr, in_8(&via[IER]), pmu_state);
1579                         break;
1580                 }
1581                 out_8(&via[IFR], intr);
1582                 if (intr & CB1_INT) {
1583                         adb_int_pending = 1;
1584                         pmu_irq_stats[0]++;
1585                 }
1586                 if (intr & SR_INT) {
1587                         req = pmu_sr_intr(regs);
1588                         if (req)
1589                                 break;
1590                 }
1591         }
1592
1593 recheck:
1594         if (pmu_state == idle) {
1595                 if (adb_int_pending) {
1596                         if (int_data_state[0] == int_data_empty)
1597                                 int_data_last = 0;
1598                         else if (int_data_state[1] == int_data_empty)
1599                                 int_data_last = 1;
1600                         else
1601                                 goto no_free_slot;
1602                         pmu_state = intack;
1603                         int_data_state[int_data_last] = int_data_fill;
1604                         /* Sounds safer to make sure ACK is high before writing.
1605                          * This helped kill a problem with ADB and some iBooks
1606                          */
1607                         wait_for_ack();
1608                         send_byte(PMU_INT_ACK);
1609                         adb_int_pending = 0;
1610                 } else if (current_req)
1611                         pmu_start();
1612         }
1613 no_free_slot:                   
1614         /* Mark the oldest buffer for flushing */
1615         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         } else if (int_data_state[int_data_last] == int_data_ready) {
1619                 int_data_state[int_data_last] = int_data_flush;
1620                 int_data = int_data_last;
1621         }
1622         --disable_poll;
1623         spin_unlock_irqrestore(&pmu_lock, flags);
1624
1625         /* Deal with completed PMU requests outside of the lock */
1626         if (req) {
1627                 pmu_done(req);
1628                 req = NULL;
1629         }
1630                 
1631         /* Deal with interrupt datas outside of the lock */
1632         if (int_data >= 0) {
1633                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs);
1634                 spin_lock_irqsave(&pmu_lock, flags);
1635                 ++disable_poll;
1636                 int_data_state[int_data] = int_data_empty;
1637                 int_data = -1;
1638                 goto recheck;
1639         }
1640
1641         return IRQ_RETVAL(handled);
1642 }
1643
1644 void
1645 pmu_unlock(void)
1646 {
1647         unsigned long flags;
1648
1649         spin_lock_irqsave(&pmu_lock, flags);
1650         if (pmu_state == locked)
1651                 pmu_state = idle;
1652         adb_int_pending = 1;
1653         spin_unlock_irqrestore(&pmu_lock, flags);
1654 }
1655
1656
1657 static irqreturn_t
1658 gpio1_interrupt(int irq, void *arg, struct pt_regs *regs)
1659 {
1660         unsigned long flags;
1661
1662         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1663                 spin_lock_irqsave(&pmu_lock, flags);
1664                 if (gpio_irq_enabled > 0) {
1665                         disable_irq_nosync(gpio_irq);
1666                         gpio_irq_enabled = 0;
1667                 }
1668                 pmu_irq_stats[1]++;
1669                 adb_int_pending = 1;
1670                 spin_unlock_irqrestore(&pmu_lock, flags);
1671                 via_pmu_interrupt(0, NULL, NULL);
1672                 return IRQ_HANDLED;
1673         }
1674         return IRQ_NONE;
1675 }
1676
1677 #ifdef CONFIG_PMAC_BACKLIGHT
1678 static int backlight_to_bright[] = {
1679         0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e,
1680         0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e
1681 };
1682  
1683 static int
1684 pmu_set_backlight_enable(int on, int level, void* data)
1685 {
1686         struct adb_request req;
1687         
1688         if (vias == NULL)
1689                 return -ENODEV;
1690
1691         if (on) {
1692                 pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
1693                             backlight_to_bright[level]);
1694                 pmu_wait_complete(&req);
1695         }
1696         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1697                     PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF));
1698         pmu_wait_complete(&req);
1699
1700         return 0;
1701 }
1702
1703 static void
1704 pmu_bright_complete(struct adb_request *req)
1705 {
1706         if (req == &bright_req_1)
1707                 clear_bit(1, &async_req_locks);
1708         if (req == &bright_req_2)
1709                 clear_bit(2, &async_req_locks);
1710 }
1711
1712 static int
1713 pmu_set_backlight_level(int level, void* data)
1714 {
1715         if (vias == NULL)
1716                 return -ENODEV;
1717
1718         if (test_and_set_bit(1, &async_req_locks))
1719                 return -EAGAIN;
1720         pmu_request(&bright_req_1, pmu_bright_complete, 2, PMU_BACKLIGHT_BRIGHT,
1721                 backlight_to_bright[level]);
1722         if (test_and_set_bit(2, &async_req_locks))
1723                 return -EAGAIN;
1724         pmu_request(&bright_req_2, pmu_bright_complete, 2, PMU_POWER_CTRL,
1725                     PMU_POW_BACKLIGHT | (level > BACKLIGHT_OFF ?
1726                                          PMU_POW_ON : PMU_POW_OFF));
1727
1728         return 0;
1729 }
1730 #endif /* CONFIG_PMAC_BACKLIGHT */
1731
1732 void
1733 pmu_enable_irled(int on)
1734 {
1735         struct adb_request req;
1736
1737         if (vias == NULL)
1738                 return ;
1739         if (pmu_kind == PMU_KEYLARGO_BASED)
1740                 return ;
1741
1742         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1743             (on ? PMU_POW_ON : PMU_POW_OFF));
1744         pmu_wait_complete(&req);
1745 }
1746
1747 void
1748 pmu_restart(void)
1749 {
1750         struct adb_request req;
1751
1752         if (via == NULL)
1753                 return;
1754
1755         local_irq_disable();
1756
1757         drop_interrupts = 1;
1758         
1759         if (pmu_kind != PMU_KEYLARGO_BASED) {
1760                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1761                                                 PMU_INT_TICK );
1762                 while(!req.complete)
1763                         pmu_poll();
1764         }
1765
1766         pmu_request(&req, NULL, 1, PMU_RESET);
1767         pmu_wait_complete(&req);
1768         for (;;)
1769                 ;
1770 }
1771
1772 void
1773 pmu_shutdown(void)
1774 {
1775         struct adb_request req;
1776
1777         if (via == NULL)
1778                 return;
1779
1780         local_irq_disable();
1781
1782         drop_interrupts = 1;
1783
1784         if (pmu_kind != PMU_KEYLARGO_BASED) {
1785                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1786                                                 PMU_INT_TICK );
1787                 pmu_wait_complete(&req);
1788         } else {
1789                 /* Disable server mode on shutdown or we'll just
1790                  * wake up again
1791                  */
1792                 pmu_set_server_mode(0);
1793         }
1794
1795         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1796                     'M', 'A', 'T', 'T');
1797         pmu_wait_complete(&req);
1798         for (;;)
1799                 ;
1800 }
1801
1802 int
1803 pmu_present(void)
1804 {
1805         return via != 0;
1806 }
1807
1808 #ifdef CONFIG_PM
1809
1810 static LIST_HEAD(sleep_notifiers);
1811
1812 int
1813 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
1814 {
1815         struct list_head *list;
1816         struct pmu_sleep_notifier *notifier;
1817
1818         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1819              list = list->next) {
1820                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1821                 if (n->priority > notifier->priority)
1822                         break;
1823         }
1824         __list_add(&n->list, list->prev, list);
1825         return 0;
1826 }
1827 EXPORT_SYMBOL(pmu_register_sleep_notifier);
1828
1829 int
1830 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
1831 {
1832         if (n->list.next == 0)
1833                 return -ENOENT;
1834         list_del(&n->list);
1835         n->list.next = NULL;
1836         return 0;
1837 }
1838 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
1839 #endif /* CONFIG_PM */
1840
1841 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1842
1843 /* Sleep is broadcast last-to-first */
1844 static int
1845 broadcast_sleep(int when, int fallback)
1846 {
1847         int ret = PBOOK_SLEEP_OK;
1848         struct list_head *list;
1849         struct pmu_sleep_notifier *notifier;
1850
1851         for (list = sleep_notifiers.prev; list != &sleep_notifiers;
1852              list = list->prev) {
1853                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1854                 ret = notifier->notifier_call(notifier, when);
1855                 if (ret != PBOOK_SLEEP_OK) {
1856                         printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
1857                                when, notifier, notifier->notifier_call);
1858                         for (; list != &sleep_notifiers; list = list->next) {
1859                                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1860                                 notifier->notifier_call(notifier, fallback);
1861                         }
1862                         return ret;
1863                 }
1864         }
1865         return ret;
1866 }
1867
1868 /* Wake is broadcast first-to-last */
1869 static int
1870 broadcast_wake(void)
1871 {
1872         int ret = PBOOK_SLEEP_OK;
1873         struct list_head *list;
1874         struct pmu_sleep_notifier *notifier;
1875
1876         for (list = sleep_notifiers.next; list != &sleep_notifiers;
1877              list = list->next) {
1878                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1879                 notifier->notifier_call(notifier, PBOOK_WAKE);
1880         }
1881         return ret;
1882 }
1883
1884 /*
1885  * This struct is used to store config register values for
1886  * PCI devices which may get powered off when we sleep.
1887  */
1888 static struct pci_save {
1889 #ifndef HACKED_PCI_SAVE
1890         u16     command;
1891         u16     cache_lat;
1892         u16     intr;
1893         u32     rom_address;
1894 #else
1895         u32     config[16];
1896 #endif  
1897 } *pbook_pci_saves;
1898 static int pbook_npci_saves;
1899
1900 static void
1901 pbook_alloc_pci_save(void)
1902 {
1903         int npci;
1904         struct pci_dev *pd = NULL;
1905
1906         npci = 0;
1907         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1908                 ++npci;
1909         }
1910         if (npci == 0)
1911                 return;
1912         pbook_pci_saves = (struct pci_save *)
1913                 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
1914         pbook_npci_saves = npci;
1915 }
1916
1917 static void
1918 pbook_free_pci_save(void)
1919 {
1920         if (pbook_pci_saves == NULL)
1921                 return;
1922         kfree(pbook_pci_saves);
1923         pbook_pci_saves = NULL;
1924         pbook_npci_saves = 0;
1925 }
1926
1927 static void
1928 pbook_pci_save(void)
1929 {
1930         struct pci_save *ps = pbook_pci_saves;
1931         struct pci_dev *pd = NULL;
1932         int npci = pbook_npci_saves;
1933         
1934         if (ps == NULL)
1935                 return;
1936
1937         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1938                 if (npci-- == 0)
1939                         return;
1940 #ifndef HACKED_PCI_SAVE
1941                 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
1942                 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
1943                 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
1944                 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
1945 #else
1946                 int i;
1947                 for (i=1;i<16;i++)
1948                         pci_read_config_dword(pd, i<<4, &ps->config[i]);
1949 #endif
1950                 ++ps;
1951         }
1952 }
1953
1954 /* For this to work, we must take care of a few things: If gmac was enabled
1955  * during boot, it will be in the pci dev list. If it's disabled at this point
1956  * (and it will probably be), then you can't access it's config space.
1957  */
1958 static void
1959 pbook_pci_restore(void)
1960 {
1961         u16 cmd;
1962         struct pci_save *ps = pbook_pci_saves - 1;
1963         struct pci_dev *pd = NULL;
1964         int npci = pbook_npci_saves;
1965         int j;
1966
1967         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1968 #ifdef HACKED_PCI_SAVE
1969                 int i;
1970                 if (npci-- == 0)
1971                         return;
1972                 ps++;
1973                 for (i=2;i<16;i++)
1974                         pci_write_config_dword(pd, i<<4, ps->config[i]);
1975                 pci_write_config_dword(pd, 4, ps->config[1]);
1976 #else
1977                 if (npci-- == 0)
1978                         return;
1979                 ps++;
1980                 if (ps->command == 0)
1981                         continue;
1982                 pci_read_config_word(pd, PCI_COMMAND, &cmd);
1983                 if ((ps->command & ~cmd) == 0)
1984                         continue;
1985                 switch (pd->hdr_type) {
1986                 case PCI_HEADER_TYPE_NORMAL:
1987                         for (j = 0; j < 6; ++j)
1988                                 pci_write_config_dword(pd,
1989                                         PCI_BASE_ADDRESS_0 + j*4,
1990                                         pd->resource[j].start);
1991                         pci_write_config_dword(pd, PCI_ROM_ADDRESS,
1992                                 ps->rom_address);
1993                         pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
1994                                 ps->cache_lat);
1995                         pci_write_config_word(pd, PCI_INTERRUPT_LINE,
1996                                 ps->intr);
1997                         pci_write_config_word(pd, PCI_COMMAND, ps->command);
1998                         break;
1999                 }
2000 #endif  
2001         }
2002 }
2003
2004 #ifdef DEBUG_SLEEP
2005 /* N.B. This doesn't work on the 3400 */
2006 void 
2007 pmu_blink(int n)
2008 {
2009         struct adb_request req;
2010
2011         memset(&req, 0, sizeof(req));
2012
2013         for (; n > 0; --n) {
2014                 req.nbytes = 4;
2015                 req.done = NULL;
2016                 req.data[0] = 0xee;
2017                 req.data[1] = 4;
2018                 req.data[2] = 0;
2019                 req.data[3] = 1;
2020                 req.reply[0] = ADB_RET_OK;
2021                 req.reply_len = 1;
2022                 req.reply_expected = 0;
2023                 pmu_polled_request(&req);
2024                 mdelay(50);
2025                 req.nbytes = 4;
2026                 req.done = NULL;
2027                 req.data[0] = 0xee;
2028                 req.data[1] = 4;
2029                 req.data[2] = 0;
2030                 req.data[3] = 0;
2031                 req.reply[0] = ADB_RET_OK;
2032                 req.reply_len = 1;
2033                 req.reply_expected = 0;
2034                 pmu_polled_request(&req);
2035                 mdelay(50);
2036         }
2037         mdelay(50);
2038 }
2039 #endif
2040
2041 /*
2042  * Put the powerbook to sleep.
2043  */
2044  
2045 static u32 save_via[8];
2046
2047 static void
2048 save_via_state(void)
2049 {
2050         save_via[0] = in_8(&via[ANH]);
2051         save_via[1] = in_8(&via[DIRA]);
2052         save_via[2] = in_8(&via[B]);
2053         save_via[3] = in_8(&via[DIRB]);
2054         save_via[4] = in_8(&via[PCR]);
2055         save_via[5] = in_8(&via[ACR]);
2056         save_via[6] = in_8(&via[T1CL]);
2057         save_via[7] = in_8(&via[T1CH]);
2058 }
2059 static void
2060 restore_via_state(void)
2061 {
2062         out_8(&via[ANH], save_via[0]);
2063         out_8(&via[DIRA], save_via[1]);
2064         out_8(&via[B], save_via[2]);
2065         out_8(&via[DIRB], save_via[3]);
2066         out_8(&via[PCR], save_via[4]);
2067         out_8(&via[ACR], save_via[5]);
2068         out_8(&via[T1CL], save_via[6]);
2069         out_8(&via[T1CH], save_via[7]);
2070         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
2071         out_8(&via[IFR], 0x7f);                         /* clear IFR */
2072         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
2073 }
2074
2075 static int
2076 pmac_suspend_devices(void)
2077 {
2078         int ret;
2079
2080         pm_prepare_console();
2081         
2082         /* Notify old-style device drivers & userland */
2083         ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
2084         if (ret != PBOOK_SLEEP_OK) {
2085                 printk(KERN_ERR "Sleep rejected by drivers\n");
2086                 return -EBUSY;
2087         }
2088
2089         /* Sync the disks. */
2090         /* XXX It would be nice to have some way to ensure that
2091          * nobody is dirtying any new buffers while we wait. That
2092          * could be achieved using the refrigerator for processes
2093          * that swsusp uses
2094          */
2095         sys_sync();
2096
2097         /* Sleep can fail now. May not be very robust but useful for debugging */
2098         ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
2099         if (ret != PBOOK_SLEEP_OK) {
2100                 printk(KERN_ERR "Driver sleep failed\n");
2101                 return -EBUSY;
2102         }
2103
2104         /* Send suspend call to devices, hold the device core's dpm_sem */
2105         ret = device_suspend(PMSG_SUSPEND);
2106         if (ret) {
2107                 broadcast_wake();
2108                 printk(KERN_ERR "Driver sleep failed\n");
2109                 return -EBUSY;
2110         }
2111
2112         /* Call platform functions marked "on sleep" */
2113         pmac_pfunc_i2c_suspend();
2114         pmac_pfunc_base_suspend();
2115
2116         /* Stop preemption */
2117         preempt_disable();
2118
2119         /* Make sure the decrementer won't interrupt us */
2120         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2121         /* Make sure any pending DEC interrupt occurring while we did
2122          * the above didn't re-enable the DEC */
2123         mb();
2124         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2125
2126         /* We can now disable MSR_EE. This code of course works properly only
2127          * on UP machines... For SMP, if we ever implement sleep, we'll have to
2128          * stop the "other" CPUs way before we do all that stuff.
2129          */
2130         local_irq_disable();
2131
2132         /* Broadcast power down irq
2133          * This isn't that useful in most cases (only directly wired devices can
2134          * use this but still... This will take care of sysdev's as well, so
2135          * we exit from here with local irqs disabled and PIC off.
2136          */
2137         ret = device_power_down(PMSG_SUSPEND);
2138         if (ret) {
2139                 wakeup_decrementer();
2140                 local_irq_enable();
2141                 preempt_enable();
2142                 device_resume();
2143                 broadcast_wake();
2144                 printk(KERN_ERR "Driver powerdown failed\n");
2145                 return -EBUSY;
2146         }
2147
2148         /* Wait for completion of async backlight requests */
2149         while (!bright_req_1.complete || !bright_req_2.complete ||
2150                         !batt_req.complete)
2151                 pmu_poll();
2152
2153         /* Giveup the lazy FPU & vec so we don't have to back them
2154          * up from the low level code
2155          */
2156         enable_kernel_fp();
2157
2158 #ifdef CONFIG_ALTIVEC
2159         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2160                 enable_kernel_altivec();
2161 #endif /* CONFIG_ALTIVEC */
2162
2163         return 0;
2164 }
2165
2166 static int
2167 pmac_wakeup_devices(void)
2168 {
2169         mdelay(100);
2170
2171         /* Power back up system devices (including the PIC) */
2172         device_power_up();
2173
2174         /* Force a poll of ADB interrupts */
2175         adb_int_pending = 1;
2176         via_pmu_interrupt(0, NULL, NULL);
2177
2178         /* Restart jiffies & scheduling */
2179         wakeup_decrementer();
2180
2181         /* Re-enable local CPU interrupts */
2182         local_irq_enable();
2183         mdelay(10);
2184         preempt_enable();
2185
2186         /* Call platform functions marked "on wake" */
2187         pmac_pfunc_base_resume();
2188         pmac_pfunc_i2c_resume();
2189
2190         /* Resume devices */
2191         device_resume();
2192
2193         /* Notify old style drivers */
2194         broadcast_wake();
2195
2196         pm_restore_console();
2197
2198         return 0;
2199 }
2200
2201 #define GRACKLE_PM      (1<<7)
2202 #define GRACKLE_DOZE    (1<<5)
2203 #define GRACKLE_NAP     (1<<4)
2204 #define GRACKLE_SLEEP   (1<<3)
2205
2206 static int powerbook_sleep_grackle(void)
2207 {
2208         unsigned long save_l2cr;
2209         unsigned short pmcr1;
2210         struct adb_request req;
2211         int ret;
2212         struct pci_dev *grackle;
2213
2214         grackle = pci_find_slot(0, 0);
2215         if (!grackle)
2216                 return -ENODEV;
2217
2218         ret = pmac_suspend_devices();
2219         if (ret) {
2220                 printk(KERN_ERR "Sleep rejected by devices\n");
2221                 return ret;
2222         }
2223         
2224         /* Turn off various things. Darwin does some retry tests here... */
2225         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2226         pmu_wait_complete(&req);
2227         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2228                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2229         pmu_wait_complete(&req);
2230
2231         /* For 750, save backside cache setting and disable it */
2232         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2233
2234         if (!__fake_sleep) {
2235                 /* Ask the PMU to put us to sleep */
2236                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2237                 pmu_wait_complete(&req);
2238         }
2239
2240         /* The VIA is supposed not to be restored correctly*/
2241         save_via_state();
2242         /* We shut down some HW */
2243         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2244
2245         pci_read_config_word(grackle, 0x70, &pmcr1);
2246         /* Apparently, MacOS uses NAP mode for Grackle ??? */
2247         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 
2248         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2249         pci_write_config_word(grackle, 0x70, pmcr1);
2250
2251         /* Call low-level ASM sleep handler */
2252         if (__fake_sleep)
2253                 mdelay(5000);
2254         else
2255                 low_sleep_handler();
2256
2257         /* We're awake again, stop grackle PM */
2258         pci_read_config_word(grackle, 0x70, &pmcr1);
2259         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 
2260         pci_write_config_word(grackle, 0x70, pmcr1);
2261
2262         /* Make sure the PMU is idle */
2263         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2264         restore_via_state();
2265         
2266         /* Restore L2 cache */
2267         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2268                 _set_L2CR(save_l2cr);
2269         
2270         /* Restore userland MMU context */
2271         set_context(current->active_mm->context, current->active_mm->pgd);
2272
2273         /* Power things up */
2274         pmu_unlock();
2275         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2276         pmu_wait_complete(&req);
2277         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2278                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2279         pmu_wait_complete(&req);
2280         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2281                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2282         pmu_wait_complete(&req);
2283
2284         pmac_wakeup_devices();
2285
2286         return 0;
2287 }
2288
2289 static int
2290 powerbook_sleep_Core99(void)
2291 {
2292         unsigned long save_l2cr;
2293         unsigned long save_l3cr;
2294         struct adb_request req;
2295         int ret;
2296         
2297         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2298                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2299                 return -ENOSYS;
2300         }
2301
2302         if (num_online_cpus() > 1 || cpu_is_offline(0))
2303                 return -EAGAIN;
2304
2305         ret = pmac_suspend_devices();
2306         if (ret) {
2307                 printk(KERN_ERR "Sleep rejected by devices\n");
2308                 return ret;
2309         }
2310
2311         /* Stop environment and ADB interrupts */
2312         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2313         pmu_wait_complete(&req);
2314
2315         /* Tell PMU what events will wake us up */
2316         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2317                 0xff, 0xff);
2318         pmu_wait_complete(&req);
2319         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2320                 0, PMU_PWR_WAKEUP_KEY |
2321                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2322         pmu_wait_complete(&req);
2323
2324         /* Save the state of the L2 and L3 caches */
2325         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
2326         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2327
2328         if (!__fake_sleep) {
2329                 /* Ask the PMU to put us to sleep */
2330                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2331                 pmu_wait_complete(&req);
2332         }
2333
2334         /* The VIA is supposed not to be restored correctly*/
2335         save_via_state();
2336
2337         /* Shut down various ASICs. There's a chance that we can no longer
2338          * talk to the PMU after this, so I moved it to _after_ sending the
2339          * sleep command to it. Still need to be checked.
2340          */
2341         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2342
2343         /* Call low-level ASM sleep handler */
2344         if (__fake_sleep)
2345                 mdelay(5000);
2346         else
2347                 low_sleep_handler();
2348
2349         /* Restore Apple core ASICs state */
2350         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2351
2352         /* Restore VIA */
2353         restore_via_state();
2354
2355         /* tweak LPJ before cpufreq is there */
2356         loops_per_jiffy *= 2;
2357
2358         /* Restore video */
2359         pmac_call_early_video_resume();
2360
2361         /* Restore L2 cache */
2362         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2363                 _set_L2CR(save_l2cr);
2364         /* Restore L3 cache */
2365         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2366                 _set_L3CR(save_l3cr);
2367         
2368         /* Restore userland MMU context */
2369         set_context(current->active_mm->context, current->active_mm->pgd);
2370
2371         /* Tell PMU we are ready */
2372         pmu_unlock();
2373         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2374         pmu_wait_complete(&req);
2375         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2376         pmu_wait_complete(&req);
2377
2378         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2379         loops_per_jiffy /= 2;
2380
2381         pmac_wakeup_devices();
2382
2383         return 0;
2384 }
2385
2386 #define PB3400_MEM_CTRL         0xf8000000
2387 #define PB3400_MEM_CTRL_SLEEP   0x70
2388
2389 static int
2390 powerbook_sleep_3400(void)
2391 {
2392         int ret, i, x;
2393         unsigned int hid0;
2394         unsigned long p;
2395         struct adb_request sleep_req;
2396         void __iomem *mem_ctrl;
2397         unsigned int __iomem *mem_ctrl_sleep;
2398
2399         /* first map in the memory controller registers */
2400         mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2401         if (mem_ctrl == NULL) {
2402                 printk("powerbook_sleep_3400: ioremap failed\n");
2403                 return -ENOMEM;
2404         }
2405         mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2406
2407         /* Allocate room for PCI save */
2408         pbook_alloc_pci_save();
2409
2410         ret = pmac_suspend_devices();
2411         if (ret) {
2412                 pbook_free_pci_save();
2413                 printk(KERN_ERR "Sleep rejected by devices\n");
2414                 return ret;
2415         }
2416
2417         /* Save the state of PCI config space for some slots */
2418         pbook_pci_save();
2419
2420         /* Set the memory controller to keep the memory refreshed
2421            while we're asleep */
2422         for (i = 0x403f; i >= 0x4000; --i) {
2423                 out_be32(mem_ctrl_sleep, i);
2424                 do {
2425                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2426                 } while (x == 0);
2427                 if (x >= 0x100)
2428                         break;
2429         }
2430
2431         /* Ask the PMU to put us to sleep */
2432         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2433         while (!sleep_req.complete)
2434                 mb();
2435
2436         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2437
2438         /* displacement-flush the L2 cache - necessary? */
2439         for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2440                 i = *(volatile int *)p;
2441         asleep = 1;
2442
2443         /* Put the CPU into sleep mode */
2444         hid0 = mfspr(SPRN_HID0);
2445         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2446         mtspr(SPRN_HID0, hid0);
2447         mtmsr(mfmsr() | MSR_POW | MSR_EE);
2448         udelay(10);
2449
2450         /* OK, we're awake again, start restoring things */
2451         out_be32(mem_ctrl_sleep, 0x3f);
2452         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2453         pbook_pci_restore();
2454         pmu_unlock();
2455
2456         /* wait for the PMU interrupt sequence to complete */
2457         while (asleep)
2458                 mb();
2459
2460         pmac_wakeup_devices();
2461         pbook_free_pci_save();
2462         iounmap(mem_ctrl);
2463
2464         return 0;
2465 }
2466
2467 #endif /* CONFIG_PM && CONFIG_PPC32 */
2468
2469 /*
2470  * Support for /dev/pmu device
2471  */
2472 #define RB_SIZE         0x10
2473 struct pmu_private {
2474         struct list_head list;
2475         int     rb_get;
2476         int     rb_put;
2477         struct rb_entry {
2478                 unsigned short len;
2479                 unsigned char data[16];
2480         }       rb_buf[RB_SIZE];
2481         wait_queue_head_t wait;
2482         spinlock_t lock;
2483 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2484         int     backlight_locker;
2485 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */     
2486 };
2487
2488 static LIST_HEAD(all_pmu_pvt);
2489 static DEFINE_SPINLOCK(all_pvt_lock);
2490
2491 static void
2492 pmu_pass_intr(unsigned char *data, int len)
2493 {
2494         struct pmu_private *pp;
2495         struct list_head *list;
2496         int i;
2497         unsigned long flags;
2498
2499         if (len > sizeof(pp->rb_buf[0].data))
2500                 len = sizeof(pp->rb_buf[0].data);
2501         spin_lock_irqsave(&all_pvt_lock, flags);
2502         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2503                 pp = list_entry(list, struct pmu_private, list);
2504                 spin_lock(&pp->lock);
2505                 i = pp->rb_put + 1;
2506                 if (i >= RB_SIZE)
2507                         i = 0;
2508                 if (i != pp->rb_get) {
2509                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2510                         rp->len = len;
2511                         memcpy(rp->data, data, len);
2512                         pp->rb_put = i;
2513                         wake_up_interruptible(&pp->wait);
2514                 }
2515                 spin_unlock(&pp->lock);
2516         }
2517         spin_unlock_irqrestore(&all_pvt_lock, flags);
2518 }
2519
2520 static int
2521 pmu_open(struct inode *inode, struct file *file)
2522 {
2523         struct pmu_private *pp;
2524         unsigned long flags;
2525
2526         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2527         if (pp == 0)
2528                 return -ENOMEM;
2529         pp->rb_get = pp->rb_put = 0;
2530         spin_lock_init(&pp->lock);
2531         init_waitqueue_head(&pp->wait);
2532         spin_lock_irqsave(&all_pvt_lock, flags);
2533 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2534         pp->backlight_locker = 0;
2535 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */     
2536         list_add(&pp->list, &all_pmu_pvt);
2537         spin_unlock_irqrestore(&all_pvt_lock, flags);
2538         file->private_data = pp;
2539         return 0;
2540 }
2541
2542 static ssize_t 
2543 pmu_read(struct file *file, char __user *buf,
2544                         size_t count, loff_t *ppos)
2545 {
2546         struct pmu_private *pp = file->private_data;
2547         DECLARE_WAITQUEUE(wait, current);
2548         unsigned long flags;
2549         int ret = 0;
2550
2551         if (count < 1 || pp == 0)
2552                 return -EINVAL;
2553         if (!access_ok(VERIFY_WRITE, buf, count))
2554                 return -EFAULT;
2555
2556         spin_lock_irqsave(&pp->lock, flags);
2557         add_wait_queue(&pp->wait, &wait);
2558         current->state = TASK_INTERRUPTIBLE;
2559
2560         for (;;) {
2561                 ret = -EAGAIN;
2562                 if (pp->rb_get != pp->rb_put) {
2563                         int i = pp->rb_get;
2564                         struct rb_entry *rp = &pp->rb_buf[i];
2565                         ret = rp->len;
2566                         spin_unlock_irqrestore(&pp->lock, flags);
2567                         if (ret > count)
2568                                 ret = count;
2569                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2570                                 ret = -EFAULT;
2571                         if (++i >= RB_SIZE)
2572                                 i = 0;
2573                         spin_lock_irqsave(&pp->lock, flags);
2574                         pp->rb_get = i;
2575                 }
2576                 if (ret >= 0)
2577                         break;
2578                 if (file->f_flags & O_NONBLOCK)
2579                         break;
2580                 ret = -ERESTARTSYS;
2581                 if (signal_pending(current))
2582                         break;
2583                 spin_unlock_irqrestore(&pp->lock, flags);
2584                 schedule();
2585                 spin_lock_irqsave(&pp->lock, flags);
2586         }
2587         current->state = TASK_RUNNING;
2588         remove_wait_queue(&pp->wait, &wait);
2589         spin_unlock_irqrestore(&pp->lock, flags);
2590         
2591         return ret;
2592 }
2593
2594 static ssize_t
2595 pmu_write(struct file *file, const char __user *buf,
2596                          size_t count, loff_t *ppos)
2597 {
2598         return 0;
2599 }
2600
2601 static unsigned int
2602 pmu_fpoll(struct file *filp, poll_table *wait)
2603 {
2604         struct pmu_private *pp = filp->private_data;
2605         unsigned int mask = 0;
2606         unsigned long flags;
2607         
2608         if (pp == 0)
2609                 return 0;
2610         poll_wait(filp, &pp->wait, wait);
2611         spin_lock_irqsave(&pp->lock, flags);
2612         if (pp->rb_get != pp->rb_put)
2613                 mask |= POLLIN;
2614         spin_unlock_irqrestore(&pp->lock, flags);
2615         return mask;
2616 }
2617
2618 static int
2619 pmu_release(struct inode *inode, struct file *file)
2620 {
2621         struct pmu_private *pp = file->private_data;
2622         unsigned long flags;
2623
2624         lock_kernel();
2625         if (pp != 0) {
2626                 file->private_data = NULL;
2627                 spin_lock_irqsave(&all_pvt_lock, flags);
2628                 list_del(&pp->list);
2629                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2630 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2631                 if (pp->backlight_locker) {
2632                         spin_lock_irqsave(&pmu_lock, flags);
2633                         disable_kernel_backlight--;
2634                         spin_unlock_irqrestore(&pmu_lock, flags);
2635                 }
2636 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2637                 kfree(pp);
2638         }
2639         unlock_kernel();
2640         return 0;
2641 }
2642
2643 static int
2644 pmu_ioctl(struct inode * inode, struct file *filp,
2645                      u_int cmd, u_long arg)
2646 {
2647         __u32 __user *argp = (__u32 __user *)arg;
2648         int error = -EINVAL;
2649
2650         switch (cmd) {
2651 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2652         case PMU_IOC_SLEEP:
2653                 if (!capable(CAP_SYS_ADMIN))
2654                         return -EACCES;
2655                 if (sleep_in_progress)
2656                         return -EBUSY;
2657                 sleep_in_progress = 1;
2658                 switch (pmu_kind) {
2659                 case PMU_OHARE_BASED:
2660                         error = powerbook_sleep_3400();
2661                         break;
2662                 case PMU_HEATHROW_BASED:
2663                 case PMU_PADDINGTON_BASED:
2664                         error = powerbook_sleep_grackle();
2665                         break;
2666                 case PMU_KEYLARGO_BASED:
2667                         error = powerbook_sleep_Core99();
2668                         break;
2669                 default:
2670                         error = -ENOSYS;
2671                 }
2672                 sleep_in_progress = 0;
2673                 break;
2674         case PMU_IOC_CAN_SLEEP:
2675                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2676                         return put_user(0, argp);
2677                 else
2678                         return put_user(1, argp);
2679 #endif /* CONFIG_PM && CONFIG_PPC32 */
2680
2681 #ifdef CONFIG_PMAC_BACKLIGHT
2682         /* Backlight should have its own device or go via
2683          * the fbdev
2684          */
2685         case PMU_IOC_GET_BACKLIGHT:
2686                 if (sleep_in_progress)
2687                         return -EBUSY;
2688                 error = get_backlight_level();
2689                 if (error < 0)
2690                         return error;
2691                 return put_user(error, argp);
2692         case PMU_IOC_SET_BACKLIGHT:
2693         {
2694                 __u32 value;
2695                 if (sleep_in_progress)
2696                         return -EBUSY;
2697                 error = get_user(value, argp);
2698                 if (!error)
2699                         error = set_backlight_level(value);
2700                 break;
2701         }
2702 #ifdef CONFIG_INPUT_ADBHID
2703         case PMU_IOC_GRAB_BACKLIGHT: {
2704                 struct pmu_private *pp = filp->private_data;
2705                 unsigned long flags;
2706
2707                 if (pp->backlight_locker)
2708                         return 0;
2709                 pp->backlight_locker = 1;
2710                 spin_lock_irqsave(&pmu_lock, flags);
2711                 disable_kernel_backlight++;
2712                 spin_unlock_irqrestore(&pmu_lock, flags);
2713                 return 0;
2714         }
2715 #endif /* CONFIG_INPUT_ADBHID */
2716 #endif /* CONFIG_PMAC_BACKLIGHT */
2717         case PMU_IOC_GET_MODEL:
2718                 return put_user(pmu_kind, argp);
2719         case PMU_IOC_HAS_ADB:
2720                 return put_user(pmu_has_adb, argp);
2721         }
2722         return error;
2723 }
2724
2725 static struct file_operations pmu_device_fops = {
2726         .read           = pmu_read,
2727         .write          = pmu_write,
2728         .poll           = pmu_fpoll,
2729         .ioctl          = pmu_ioctl,
2730         .open           = pmu_open,
2731         .release        = pmu_release,
2732 };
2733
2734 static struct miscdevice pmu_device = {
2735         PMU_MINOR, "pmu", &pmu_device_fops
2736 };
2737
2738 static int pmu_device_init(void)
2739 {
2740         if (!via)
2741                 return 0;
2742         if (misc_register(&pmu_device) < 0)
2743                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2744         return 0;
2745 }
2746 device_initcall(pmu_device_init);
2747
2748
2749 #ifdef DEBUG_SLEEP
2750 static inline void 
2751 polled_handshake(volatile unsigned char __iomem *via)
2752 {
2753         via[B] &= ~TREQ; eieio();
2754         while ((via[B] & TACK) != 0)
2755                 ;
2756         via[B] |= TREQ; eieio();
2757         while ((via[B] & TACK) == 0)
2758                 ;
2759 }
2760
2761 static inline void 
2762 polled_send_byte(volatile unsigned char __iomem *via, int x)
2763 {
2764         via[ACR] |= SR_OUT | SR_EXT; eieio();
2765         via[SR] = x; eieio();
2766         polled_handshake(via);
2767 }
2768
2769 static inline int
2770 polled_recv_byte(volatile unsigned char __iomem *via)
2771 {
2772         int x;
2773
2774         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2775         x = via[SR]; eieio();
2776         polled_handshake(via);
2777         x = via[SR]; eieio();
2778         return x;
2779 }
2780
2781 int
2782 pmu_polled_request(struct adb_request *req)
2783 {
2784         unsigned long flags;
2785         int i, l, c;
2786         volatile unsigned char __iomem *v = via;
2787
2788         req->complete = 1;
2789         c = req->data[0];
2790         l = pmu_data_len[c][0];
2791         if (l >= 0 && req->nbytes != l + 1)
2792                 return -EINVAL;
2793
2794         local_irq_save(flags);
2795         while (pmu_state != idle)
2796                 pmu_poll();
2797
2798         while ((via[B] & TACK) == 0)
2799                 ;
2800         polled_send_byte(v, c);
2801         if (l < 0) {
2802                 l = req->nbytes - 1;
2803                 polled_send_byte(v, l);
2804         }
2805         for (i = 1; i <= l; ++i)
2806                 polled_send_byte(v, req->data[i]);
2807
2808         l = pmu_data_len[c][1];
2809         if (l < 0)
2810                 l = polled_recv_byte(v);
2811         for (i = 0; i < l; ++i)
2812                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2813
2814         if (req->done)
2815                 (*req->done)(req);
2816
2817         local_irq_restore(flags);
2818         return 0;
2819 }
2820 #endif /* DEBUG_SLEEP */
2821
2822
2823 /* FIXME: This is a temporary set of callbacks to enable us
2824  * to do suspend-to-disk.
2825  */
2826
2827 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2828
2829 static int pmu_sys_suspended = 0;
2830
2831 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2832 {
2833         if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2834                 return 0;
2835
2836         /* Suspend PMU event interrupts */
2837         pmu_suspend();
2838
2839         pmu_sys_suspended = 1;
2840         return 0;
2841 }
2842
2843 static int pmu_sys_resume(struct sys_device *sysdev)
2844 {
2845         struct adb_request req;
2846
2847         if (!pmu_sys_suspended)
2848                 return 0;
2849
2850         /* Tell PMU we are ready */
2851         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2852         pmu_wait_complete(&req);
2853
2854         /* Resume PMU event interrupts */
2855         pmu_resume();
2856
2857         pmu_sys_suspended = 0;
2858
2859         return 0;
2860 }
2861
2862 #endif /* CONFIG_PM && CONFIG_PPC32 */
2863
2864 static struct sysdev_class pmu_sysclass = {
2865         set_kset_name("pmu"),
2866 };
2867
2868 static struct sys_device device_pmu = {
2869         .id             = 0,
2870         .cls            = &pmu_sysclass,
2871 };
2872
2873 static struct sysdev_driver driver_pmu = {
2874 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2875         .suspend        = &pmu_sys_suspend,
2876         .resume         = &pmu_sys_resume,
2877 #endif /* CONFIG_PM && CONFIG_PPC32 */
2878 };
2879
2880 static int __init init_pmu_sysfs(void)
2881 {
2882         int rc;
2883
2884         rc = sysdev_class_register(&pmu_sysclass);
2885         if (rc) {
2886                 printk(KERN_ERR "Failed registering PMU sys class\n");
2887                 return -ENODEV;
2888         }
2889         rc = sysdev_register(&device_pmu);
2890         if (rc) {
2891                 printk(KERN_ERR "Failed registering PMU sys device\n");
2892                 return -ENODEV;
2893         }
2894         rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2895         if (rc) {
2896                 printk(KERN_ERR "Failed registering PMU sys driver\n");
2897                 return -ENODEV;
2898         }
2899         return 0;
2900 }
2901
2902 subsys_initcall(init_pmu_sysfs);
2903
2904 EXPORT_SYMBOL(pmu_request);
2905 EXPORT_SYMBOL(pmu_queue_request);
2906 EXPORT_SYMBOL(pmu_poll);
2907 EXPORT_SYMBOL(pmu_poll_adb);
2908 EXPORT_SYMBOL(pmu_wait_complete);
2909 EXPORT_SYMBOL(pmu_suspend);
2910 EXPORT_SYMBOL(pmu_resume);
2911 EXPORT_SYMBOL(pmu_unlock);
2912 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2913 EXPORT_SYMBOL(pmu_enable_irled);
2914 EXPORT_SYMBOL(pmu_battery_count);
2915 EXPORT_SYMBOL(pmu_batteries);
2916 EXPORT_SYMBOL(pmu_power_flags);
2917 #endif /* CONFIG_PM && CONFIG_PPC32 */
2918