blob: c63d4e7984be6e1884388f3c2875df6ce621a164 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Benjamin Herrenschmidt5b9ca522006-01-07 11:41:02 +110058#include <asm/pmac_pfunc.h>
59#include <asm/pmac_low_i2c.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#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
Benjamin Herrenschmidte4ee69c2005-06-27 14:36:32 -070068#ifdef CONFIG_PPC32
69#include <asm/open_pic.h>
70#endif
71
Linus Torvalds1da177e2005-04-16 15:20:36 -070072/* 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
83static 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
120static volatile enum pmu_state {
121 idle,
122 sending,
123 intack,
124 reading,
125 reading_intr,
126 locked,
127} pmu_state;
128
129static 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
136static struct adb_request *current_req;
137static struct adb_request *last_req;
138static struct adb_request *req_awaiting_reply;
139static unsigned char interrupt_data[2][32];
140static int interrupt_data_len[2];
141static int int_data_last;
142static unsigned char *reply_ptr;
143static int data_index;
144static int data_len;
145static volatile int adb_int_pending;
146static volatile int disable_poll;
147static struct adb_request bright_req_1, bright_req_2;
148static struct device_node *vias;
149static int pmu_kind = PMU_UNKNOWN;
150static int pmu_fully_inited = 0;
151static int pmu_has_adb;
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100152static struct device_node *gpio_node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153static unsigned char __iomem *gpio_reg = NULL;
154static int gpio_irq = -1;
155static int gpio_irq_enabled = -1;
156static volatile int pmu_suspended = 0;
157static spinlock_t pmu_lock;
158static u8 pmu_intr_mask;
159static int pmu_version;
160static int drop_interrupts;
Paul Mackerrasa0005032005-11-02 15:08:17 +1100161#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162static int option_lid_wakeup = 1;
Paul Mackerrasa0005032005-11-02 15:08:17 +1100163#endif /* CONFIG_PM && CONFIG_PPC32 */
Andrew Morton57ae5952006-03-21 23:20:27 -0800164#if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT)
Kristian Muellera04c8782005-12-15 12:31:55 +0800165static int sleep_in_progress;
Andrew Morton57ae5952006-03-21 23:20:27 -0800166#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167static unsigned long async_req_locks;
168static unsigned int pmu_irq_stats[11];
169
170static struct proc_dir_entry *proc_pmu_root;
171static struct proc_dir_entry *proc_pmu_info;
172static struct proc_dir_entry *proc_pmu_irqstats;
173static struct proc_dir_entry *proc_pmu_options;
174static int option_server_mode;
175
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176int pmu_battery_count;
177int pmu_cur_battery;
178unsigned int pmu_power_flags;
179struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
180static int query_batt_timer = BATTERY_POLLING_COUNT;
181static struct adb_request batt_req;
182static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
184#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
185extern int disable_kernel_backlight;
186#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
187
188int __fake_sleep;
189int asleep;
Alan Sterne041c682006-03-27 01:16:30 -0800190BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
192#ifdef CONFIG_ADB
193static int adb_dev_map = 0;
194static int pmu_adb_flags;
195
196static int pmu_probe(void);
197static int pmu_init(void);
198static int pmu_send_request(struct adb_request *req, int sync);
199static int pmu_adb_autopoll(int devs);
200static int pmu_adb_reset_bus(void);
201#endif /* CONFIG_ADB */
202
203static int init_pmu(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204static void pmu_start(void);
205static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
206static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
207static int proc_get_info(char *page, char **start, off_t off,
208 int count, int *eof, void *data);
209static int proc_get_irqstats(char *page, char **start, off_t off,
210 int count, int *eof, void *data);
211#ifdef CONFIG_PMAC_BACKLIGHT
212static int pmu_set_backlight_level(int level, void* data);
213static int pmu_set_backlight_enable(int on, int level, void* data);
214#endif /* CONFIG_PMAC_BACKLIGHT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215static void pmu_pass_intr(unsigned char *data, int len);
216static int proc_get_batt(char *page, char **start, off_t off,
217 int count, int *eof, void *data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218static int proc_read_options(char *page, char **start, off_t off,
219 int count, int *eof, void *data);
220static int proc_write_options(struct file *file, const char __user *buffer,
221 unsigned long count, void *data);
222
223#ifdef CONFIG_ADB
224struct 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
235extern void low_sleep_handler(void);
236extern void enable_kernel_altivec(void);
237extern void enable_kernel_fp(void);
238
239#ifdef DEBUG_SLEEP
240int pmu_polled_request(struct adb_request *req);
241int 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 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500251static const s8 pmu_data_len[256][2] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252/* 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
287static 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
296static struct backlight_controller pmu_backlight_controller = {
297 pmu_set_backlight_enable,
298 pmu_set_backlight_level
299};
300#endif /* CONFIG_PMAC_BACKLIGHT */
301
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100302int __init find_via_pmu(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303{
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100304 u64 taddr;
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100305 u32 *reg;
306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 if (via != 0)
308 return 1;
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100309 vias = of_find_node_by_name(NULL, "via-pmu");
310 if (vias == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100313 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);
Benjamin Herrenschmidtbb6b9b22005-11-30 16:54:12 +1100319 if (taddr == OF_BAD_ADDR) {
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100320 printk(KERN_ERR "via-pmu: Can't translate address !\n");
321 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 }
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")) {
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100342 struct device_node *gpiop;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100343 u64 gaddr = OF_BAD_ADDR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
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
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100353 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);
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100358 if (gaddr != OF_BAD_ADDR)
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100359 gpio_reg = ioremap(gaddr, 0x10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 }
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100361 if (gpio_reg == NULL)
362 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 } else
364 pmu_kind = PMU_UNKNOWN;
365
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100366 via = ioremap(taddr, 0x2000);
367 if (via == NULL) {
368 printk(KERN_ERR "via-pmu: Can't map address !\n");
369 goto fail;
370 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
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
Benjamin Herrenschmidtbb6b9b22005-11-30 16:54:12 +1100382 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
384
385 sys_ctrler = SYS_CTRLER_PMU;
386
387 return 1;
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100388 fail:
389 of_node_put(vias);
390 vias = NULL;
391 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392}
393
394#ifdef CONFIG_ADB
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100395static int pmu_probe(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396{
397 return vias == NULL? -ENODEV: 0;
398}
399
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100400static int __init pmu_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401{
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 */
415static 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 batt_req.complete = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100424#ifndef CONFIG_PPC_MERGE
Benjamin Herrenschmidte4ee69c2005-06-27 14:36:32 -0700425 if (pmu_kind == PMU_KEYLARGO_BASED)
426 openpic_set_irq_priority(vias->intrs[0].line,
427 OPENPIC_PRIORITY_DEFAULT + 1);
428#endif
429
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 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
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100437 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 }
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
475arch_initcall(via_pmu_start);
476
477/*
478 * This has to be done after pci_init, which is a subsys_initcall.
479 */
480static int __init via_pmu_dev_init(void)
481{
482 if (vias == NULL)
483 return -ENODEV;
484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485#ifdef CONFIG_PMAC_BACKLIGHT
486 /* Enable backlight */
487 register_backlight_controller(&pmu_backlight_controller, NULL, "pmu");
488#endif /* CONFIG_PMAC_BACKLIGHT */
489
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700490#ifdef CONFIG_PPC32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 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 }
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700518#endif /* CONFIG_PPC32 */
519
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 /* Create /proc/pmu */
521 proc_pmu_root = proc_mkdir("pmu", NULL);
522 if (proc_pmu_root) {
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700523 long i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
525 for (i=0; i<pmu_battery_count; i++) {
526 char title[16];
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700527 sprintf(title, "battery_%ld", i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
529 proc_get_batt, (void *)i);
530 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
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
546device_initcall(via_pmu_dev_init);
547
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500548static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549init_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
610int
611pmu_get_model(void)
612{
613 return pmu_kind;
614}
615
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639/* This new version of the code for 2400/3400/3500 powerbooks
640 * is inspired from the implementation in gkrellm-pmu
641 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500642static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643done_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500730static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731done_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500808static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809query_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500821static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822proc_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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 p += sprintf(p, "AC Power : %d\n",
Benjamin Herrenschmidt63e1fd42006-03-13 21:20:42 -0800830 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 p += sprintf(p, "Battery count : %d\n", pmu_battery_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832
833 return p - page;
834}
835
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500836static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837proc_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500863static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864proc_get_batt(char *page, char **start, off_t off,
865 int count, int *eof, void *data)
866{
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700867 long batnum = (long)data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 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}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500887static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888proc_read_options(char *page, char **start, off_t off,
889 int count, int *eof, void *data)
890{
891 char *p = page;
892
Paul Mackerrasa0005032005-11-02 15:08:17 +1100893#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 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);
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700897#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 if (pmu_kind == PMU_KEYLARGO_BASED)
899 p += sprintf(p, "server_mode=%d\n", option_server_mode);
900
901 return p - page;
902}
903
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500904static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905proc_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++;
Paul Mackerrasa0005032005-11-02 15:08:17 +1100934#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 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');
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700939#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 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 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500951static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952pmu_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 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001031static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032pmu_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 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001054static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055pmu_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 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001089int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001115int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116pmu_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
1154static inline void
1155wait_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 */
1172static inline void
1173send_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
1183static inline void
1184recv_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
1194static inline void
1195pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001207static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001231void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232pmu_poll(void)
1233{
1234 if (!via)
1235 return;
1236 if (disable_poll)
1237 return;
1238 via_pmu_interrupt(0, NULL, NULL);
1239}
1240
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001241void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001256void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257pmu_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 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001270void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001310void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311pmu_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 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001340static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341pmu_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
1364next:
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 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406#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) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432 /* 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 }
1447 goto next;
1448}
1449
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001450static struct adb_request*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001556static irqreturn_t
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557via_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
1593recheck:
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 }
1613no_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001644void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001657static irqreturn_t
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658gpio1_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001678static int backlight_to_bright[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e,
1680 0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e
1681};
1682
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001683static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001703static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001712static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001732void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001733pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001747void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001772void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773pmu_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
1802int
1803pmu_present(void)
1804{
1805 return via != 0;
1806}
1807
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -07001808#ifdef CONFIG_PM
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809
1810static LIST_HEAD(sleep_notifiers);
1811
1812int
1813pmu_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}
Paul Mackerras3fb62b52005-11-08 12:14:50 +11001827EXPORT_SYMBOL(pmu_register_sleep_notifier);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828
1829int
1830pmu_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}
Paul Mackerras3fb62b52005-11-08 12:14:50 +11001838EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
Paul Mackerrasa0005032005-11-02 15:08:17 +11001839#endif /* CONFIG_PM */
1840
1841#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842
1843/* Sleep is broadcast last-to-first */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001844static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845broadcast_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 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001869static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870broadcast_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 */
1888static 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;
1898static int pbook_npci_saves;
1899
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001900static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901pbook_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001917static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918pbook_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001927static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928pbook_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 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001958static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959pbook_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 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002006void
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002045static u32 save_via[8];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002047static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048save_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}
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002059static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060restore_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002075static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076pmac_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
Benjamin Herrenschmidt5b9ca522006-01-07 11:41:02 +11002112 /* Call platform functions marked "on sleep" */
2113 pmac_pfunc_i2c_suspend();
2114 pmac_pfunc_base_suspend();
2115
Benjamin Herrenschmidte521dca2005-05-02 16:12:00 +10002116 /* Stop preemption */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117 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 */
Pavel Machekbf2049f2005-04-16 15:25:38 -07002137 ret = device_power_down(PMSG_SUSPEND);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138 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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002166static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167pmac_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();
Benjamin Herrenschmidtb16eeb42005-05-27 12:53:02 -07002183 mdelay(10);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002184 preempt_enable();
2185
Benjamin Herrenschmidt5b9ca522006-01-07 11:41:02 +11002186 /* Call platform functions marked "on wake" */
2187 pmac_pfunc_base_resume();
2188 pmac_pfunc_i2c_resume();
2189
Linus Torvalds1da177e2005-04-16 15:20:36 -07002190 /* 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
Olaf Hering3bea6312006-03-21 23:00:05 -08002206static int powerbook_sleep_grackle(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207{
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 */
Paul Mackerras6218a762006-06-11 14:15:17 +10002271 set_context(current->active_mm->context.id, current->active_mm->pgd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002272
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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002289static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002290powerbook_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
Benjamin Herrenschmidtb16eeb42005-05-27 12:53:02 -07002311 /* Stop environment and ADB interrupts */
2312 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2313 pmu_wait_complete(&req);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002314
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
Benjamin Herrenschmidt0086b5e2005-06-10 14:19:02 +10002355 /* tweak LPJ before cpufreq is there */
2356 loops_per_jiffy *= 2;
2357
Linus Torvalds1da177e2005-04-16 15:20:36 -07002358 /* 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 */
Paul Mackerras6218a762006-06-11 14:15:17 +10002369 set_context(current->active_mm->context.id, current->active_mm->pgd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002370
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
Benjamin Herrenschmidt0086b5e2005-06-10 14:19:02 +10002378 /* Restore LPJ, cpufreq will adjust the cpu frequency */
2379 loops_per_jiffy /= 2;
2380
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381 pmac_wakeup_devices();
2382
2383 return 0;
2384}
2385
2386#define PB3400_MEM_CTRL 0xf8000000
2387#define PB3400_MEM_CTRL_SLEEP 0x70
2388
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002389static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390powerbook_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 */
Benjamin Herrenschmidt21fe3302005-11-07 16:41:59 +11002444 hid0 = mfspr(SPRN_HID0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002445 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
Benjamin Herrenschmidt21fe3302005-11-07 16:41:59 +11002446 mtspr(SPRN_HID0, hid0);
2447 mtmsr(mfmsr() | MSR_POW | MSR_EE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448 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
Paul Mackerrasa0005032005-11-02 15:08:17 +11002467#endif /* CONFIG_PM && CONFIG_PPC32 */
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -07002468
Linus Torvalds1da177e2005-04-16 15:20:36 -07002469/*
2470 * Support for /dev/pmu device
2471 */
2472#define RB_SIZE 0x10
2473struct 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
2488static LIST_HEAD(all_pmu_pvt);
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002489static DEFINE_SPINLOCK(all_pvt_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002490
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002491static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07002492pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002520static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002542static ssize_t
Linus Torvalds1da177e2005-04-16 15:20:36 -07002543pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002594static ssize_t
Linus Torvalds1da177e2005-04-16 15:20:36 -07002595pmu_write(struct file *file, const char __user *buf,
2596 size_t count, loff_t *ppos)
2597{
2598 return 0;
2599}
2600
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002601static unsigned int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002602pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002618static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002619pmu_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002643static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002644pmu_ioctl(struct inode * inode, struct file *filp,
2645 u_int cmd, u_long arg)
2646{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002647 __u32 __user *argp = (__u32 __user *)arg;
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -07002648 int error = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002649
2650 switch (cmd) {
Paul Mackerrasa0005032005-11-02 15:08:17 +11002651#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002652 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;
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -07002673 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002674 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);
Paul Mackerrasa0005032005-11-02 15:08:17 +11002679#endif /* CONFIG_PM && CONFIG_PPC32 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002680
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);
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -07002700 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002701 }
2702#ifdef CONFIG_INPUT_ADBHID
2703 case PMU_IOC_GRAB_BACKLIGHT: {
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -07002704 struct pmu_private *pp = filp->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002705 unsigned long flags;
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -07002706
Linus Torvalds1da177e2005-04-16 15:20:36 -07002707 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 }
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -07002722 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002723}
2724
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002725static struct file_operations pmu_device_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002726 .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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002734static struct miscdevice pmu_device = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002735 PMU_MINOR, "pmu", &pmu_device_fops
2736};
2737
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -07002738static int pmu_device_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002739{
2740 if (!via)
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -07002741 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002742 if (misc_register(&pmu_device) < 0)
2743 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -07002744 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002745}
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -07002746device_initcall(pmu_device_init);
2747
Linus Torvalds1da177e2005-04-16 15:20:36 -07002748
2749#ifdef DEBUG_SLEEP
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002750static inline void
Linus Torvalds1da177e2005-04-16 15:20:36 -07002751polled_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002761static inline void
Linus Torvalds1da177e2005-04-16 15:20:36 -07002762polled_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002769static inline int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002770polled_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
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05002781int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002782pmu_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
Paul Mackerrasa0005032005-11-02 15:08:17 +11002827#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002828
2829static int pmu_sys_suspended = 0;
2830
Pavel Machek3bfffd92005-04-16 15:25:37 -07002831static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002832{
Pavel Machekca078ba2005-09-03 15:56:57 -07002833 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002834 return 0;
2835
2836 /* Suspend PMU event interrupts */
2837 pmu_suspend();
2838
2839 pmu_sys_suspended = 1;
2840 return 0;
2841}
2842
2843static 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
Paul Mackerrasa0005032005-11-02 15:08:17 +11002862#endif /* CONFIG_PM && CONFIG_PPC32 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002863
2864static struct sysdev_class pmu_sysclass = {
2865 set_kset_name("pmu"),
2866};
2867
2868static struct sys_device device_pmu = {
2869 .id = 0,
2870 .cls = &pmu_sysclass,
2871};
2872
2873static struct sysdev_driver driver_pmu = {
Paul Mackerrasa0005032005-11-02 15:08:17 +11002874#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002875 .suspend = &pmu_sys_suspend,
2876 .resume = &pmu_sys_resume,
Paul Mackerrasa0005032005-11-02 15:08:17 +11002877#endif /* CONFIG_PM && CONFIG_PPC32 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002878};
2879
2880static 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
2902subsys_initcall(init_pmu_sysfs);
2903
2904EXPORT_SYMBOL(pmu_request);
Benjamin Herrenschmidt730745a2006-01-07 11:30:44 +11002905EXPORT_SYMBOL(pmu_queue_request);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002906EXPORT_SYMBOL(pmu_poll);
2907EXPORT_SYMBOL(pmu_poll_adb);
2908EXPORT_SYMBOL(pmu_wait_complete);
2909EXPORT_SYMBOL(pmu_suspend);
2910EXPORT_SYMBOL(pmu_resume);
2911EXPORT_SYMBOL(pmu_unlock);
Paul Mackerrasa0005032005-11-02 15:08:17 +11002912#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002913EXPORT_SYMBOL(pmu_enable_irled);
2914EXPORT_SYMBOL(pmu_battery_count);
2915EXPORT_SYMBOL(pmu_batteries);
2916EXPORT_SYMBOL(pmu_power_flags);
Paul Mackerrasa0005032005-11-02 15:08:17 +11002917#endif /* CONFIG_PM && CONFIG_PPC32 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002918