via-pmu.c

linux 内核源代码

	}
	--disable_poll;
	spin_unlock_irqrestore(&pmu_lock, flags);

	/* Deal with completed PMU requests outside of the lock */
	if (req) {
		pmu_done(req);
		req = NULL;
	}
		
	/* Deal with interrupt datas outside of the lock */
	if (int_data >= 0) {
		pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
		spin_lock_irqsave(&pmu_lock, flags);
		++disable_poll;
		int_data_state[int_data] = int_data_empty;
		int_data = -1;
		goto recheck;
	}

	return IRQ_RETVAL(handled);
}

void
pmu_unlock(void)
{
	unsigned long flags;

	spin_lock_irqsave(&pmu_lock, flags);
	if (pmu_state == locked)
		pmu_state = idle;
	adb_int_pending = 1;
	spin_unlock_irqrestore(&pmu_lock, flags);
}


static irqreturn_t
gpio1_interrupt(int irq, void *arg)
{
	unsigned long flags;

	if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
		spin_lock_irqsave(&pmu_lock, flags);
		if (gpio_irq_enabled > 0) {
			disable_irq_nosync(gpio_irq);
			gpio_irq_enabled = 0;
		}
		pmu_irq_stats[1]++;
		adb_int_pending = 1;
		spin_unlock_irqrestore(&pmu_lock, flags);
		via_pmu_interrupt(0, NULL);
		return IRQ_HANDLED;
	}
	return IRQ_NONE;
}

void
pmu_enable_irled(int on)
{
	struct adb_request req;

	if (vias == NULL)
		return ;
	if (pmu_kind == PMU_KEYLARGO_BASED)
		return ;

	pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
	    (on ? PMU_POW_ON : PMU_POW_OFF));
	pmu_wait_complete(&req);
}

void
pmu_restart(void)
{
	struct adb_request req;

	if (via == NULL)
		return;

	local_irq_disable();

	drop_interrupts = 1;
	
	if (pmu_kind != PMU_KEYLARGO_BASED) {
		pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
						PMU_INT_TICK );
		while(!req.complete)
			pmu_poll();
	}

	pmu_request(&req, NULL, 1, PMU_RESET);
	pmu_wait_complete(&req);
	for (;;)
		;
}

void
pmu_shutdown(void)
{
	struct adb_request req;

	if (via == NULL)
		return;

	local_irq_disable();

	drop_interrupts = 1;

	if (pmu_kind != PMU_KEYLARGO_BASED) {
		pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
						PMU_INT_TICK );
		pmu_wait_complete(&req);
	} else {
		/* Disable server mode on shutdown or we'll just
		 * wake up again
		 */
		pmu_set_server_mode(0);
	}

	pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
		    'M', 'A', 'T', 'T');
	pmu_wait_complete(&req);
	for (;;)
		;
}

int
pmu_present(void)
{
	return via != 0;
}

#ifdef CONFIG_PM_SLEEP

static LIST_HEAD(sleep_notifiers);

int
pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
{
	struct list_head *list;
	struct pmu_sleep_notifier *notifier;

	for (list = sleep_notifiers.next; list != &sleep_notifiers;
	     list = list->next) {
		notifier = list_entry(list, struct pmu_sleep_notifier, list);
		if (n->priority > notifier->priority)
			break;
	}
	__list_add(&n->list, list->prev, list);
	return 0;
}
EXPORT_SYMBOL(pmu_register_sleep_notifier);

int
pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
{
	if (n->list.next == 0)
		return -ENOENT;
	list_del(&n->list);
	n->list.next = NULL;
	return 0;
}
EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
#endif /* CONFIG_PM_SLEEP */

#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)

/* Sleep is broadcast last-to-first */
static void broadcast_sleep(int when)
{
	struct list_head *list;
	struct pmu_sleep_notifier *notifier;

	for (list = sleep_notifiers.prev; list != &sleep_notifiers;
	     list = list->prev) {
		notifier = list_entry(list, struct pmu_sleep_notifier, list);
		notifier->notifier_call(notifier, when);
	}
}

/* Wake is broadcast first-to-last */
static void broadcast_wake(void)
{
	struct list_head *list;
	struct pmu_sleep_notifier *notifier;

	for (list = sleep_notifiers.next; list != &sleep_notifiers;
	     list = list->next) {
		notifier = list_entry(list, struct pmu_sleep_notifier, list);
		notifier->notifier_call(notifier, PBOOK_WAKE);
	}
}

/*
 * This struct is used to store config register values for
 * PCI devices which may get powered off when we sleep.
 */
static struct pci_save {
#ifndef HACKED_PCI_SAVE
	u16	command;
	u16	cache_lat;
	u16	intr;
	u32	rom_address;
#else
	u32	config[16];
#endif	
} *pbook_pci_saves;
static int pbook_npci_saves;

static void
pbook_alloc_pci_save(void)
{
	int npci;
	struct pci_dev *pd = NULL;

	npci = 0;
	while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
		++npci;
	}
	if (npci == 0)
		return;
	pbook_pci_saves = (struct pci_save *)
		kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
	pbook_npci_saves = npci;
}

static void
pbook_free_pci_save(void)
{
	if (pbook_pci_saves == NULL)
		return;
	kfree(pbook_pci_saves);
	pbook_pci_saves = NULL;
	pbook_npci_saves = 0;
}

static void
pbook_pci_save(void)
{
	struct pci_save *ps = pbook_pci_saves;
	struct pci_dev *pd = NULL;
	int npci = pbook_npci_saves;
	
	if (ps == NULL)
		return;

	while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
		if (npci-- == 0) {
			pci_dev_put(pd);
			return;
		}
#ifndef HACKED_PCI_SAVE
		pci_read_config_word(pd, PCI_COMMAND, &ps->command);
		pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
		pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
		pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
#else
		int i;
		for (i=1;i<16;i++)
			pci_read_config_dword(pd, i<<4, &ps->config[i]);
#endif
		++ps;
	}
}

/* For this to work, we must take care of a few things: If gmac was enabled
 * during boot, it will be in the pci dev list. If it's disabled at this point
 * (and it will probably be), then you can't access it's config space.
 */
static void
pbook_pci_restore(void)
{
	u16 cmd;
	struct pci_save *ps = pbook_pci_saves - 1;
	struct pci_dev *pd = NULL;
	int npci = pbook_npci_saves;
	int j;

	while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
#ifdef HACKED_PCI_SAVE
		int i;
		if (npci-- == 0) {
			pci_dev_put(pd);
			return;
		}
		ps++;
		for (i=2;i<16;i++)
			pci_write_config_dword(pd, i<<4, ps->config[i]);
		pci_write_config_dword(pd, 4, ps->config[1]);
#else
		if (npci-- == 0)
			return;
		ps++;
		if (ps->command == 0)
			continue;
		pci_read_config_word(pd, PCI_COMMAND, &cmd);
		if ((ps->command & ~cmd) == 0)
			continue;
		switch (pd->hdr_type) {
		case PCI_HEADER_TYPE_NORMAL:
			for (j = 0; j < 6; ++j)
				pci_write_config_dword(pd,
					PCI_BASE_ADDRESS_0 + j*4,
					pd->resource[j].start);
			pci_write_config_dword(pd, PCI_ROM_ADDRESS,
				ps->rom_address);
			pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
				ps->cache_lat);
			pci_write_config_word(pd, PCI_INTERRUPT_LINE,
				ps->intr);
			pci_write_config_word(pd, PCI_COMMAND, ps->command);
			break;
		}
#endif	
	}
}

#ifdef DEBUG_SLEEP
/* N.B. This doesn't work on the 3400 */
void 
pmu_blink(int n)
{
	struct adb_request req;

	memset(&req, 0, sizeof(req));

	for (; n > 0; --n) {
		req.nbytes = 4;
		req.done = NULL;
		req.data[0] = 0xee;
		req.data[1] = 4;
		req.data[2] = 0;
		req.data[3] = 1;
		req.reply[0] = ADB_RET_OK;
		req.reply_len = 1;
		req.reply_expected = 0;
		pmu_polled_request(&req);
		mdelay(50);
		req.nbytes = 4;
		req.done = NULL;
		req.data[0] = 0xee;
		req.data[1] = 4;
		req.data[2] = 0;
		req.data[3] = 0;
		req.reply[0] = ADB_RET_OK;
		req.reply_len = 1;
		req.reply_expected = 0;
		pmu_polled_request(&req);
		mdelay(50);
	}
	mdelay(50);
}
#endif

/*
 * Put the powerbook to sleep.
 */
 
static u32 save_via[8];

static void
save_via_state(void)
{
	save_via[0] = in_8(&via[ANH]);
	save_via[1] = in_8(&via[DIRA]);
	save_via[2] = in_8(&via[B]);
	save_via[3] = in_8(&via[DIRB]);
	save_via[4] = in_8(&via[PCR]);
	save_via[5] = in_8(&via[ACR]);
	save_via[6] = in_8(&via[T1CL]);
	save_via[7] = in_8(&via[T1CH]);
}
static void
restore_via_state(void)
{
	out_8(&via[ANH], save_via[0]);
	out_8(&via[DIRA], save_via[1]);
	out_8(&via[B], save_via[2]);
	out_8(&via[DIRB], save_via[3]);
	out_8(&via[PCR], save_via[4]);
	out_8(&via[ACR], save_via[5]);
	out_8(&via[T1CL], save_via[6]);
	out_8(&via[T1CH], save_via[7]);
	out_8(&via[IER], IER_CLR | 0x7f);	/* disable all intrs */
	out_8(&via[IFR], 0x7f);				/* clear IFR */
	out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
}

extern void pmu_backlight_set_sleep(int sleep);

static int
pmac_suspend_devices(void)
{
	int ret;

	pm_prepare_console();
	
	/* Notify old-style device drivers */
	broadcast_sleep(PBOOK_SLEEP_REQUEST);

	/* Sync the disks. */
	/* XXX It would be nice to have some way to ensure that
	 * nobody is dirtying any new buffers while we wait. That
	 * could be achieved using the refrigerator for processes
	 * that swsusp uses
	 */
	sys_sync();

	broadcast_sleep(PBOOK_SLEEP_NOW);

	/* Send suspend call to devices, hold the device core's dpm_sem */
	ret = device_suspend(PMSG_SUSPEND);
	if (ret) {
		broadcast_wake();
		printk(KERN_ERR "Driver sleep failed\n");
		return -EBUSY;
	}

#ifdef CONFIG_PMAC_BACKLIGHT
	/* Tell backlight code not to muck around with the chip anymore */
	pmu_backlight_set_sleep(1);
#endif

	/* Call platform functions marked "on sleep" */
	pmac_pfunc_i2c_suspend();
	pmac_pfunc_base_suspend();

	/* Stop preemption */
	preempt_disable();

	/* Make sure the decrementer won't interrupt us */
	asm volatile("mtdec %0" : : "r" (0x7fffffff));
	/* Make sure any pending DEC interrupt occurring while we did
	 * the above didn't re-enable the DEC */
	mb();
	asm volatile("mtdec %0" : : "r" (0x7fffffff));

	/* We can now disable MSR_EE. This code of course works properly only
	 * on UP machines... For SMP, if we ever implement sleep, we'll have to
	 * stop the "other" CPUs way before we do all that stuff.
	 */
	local_irq_disable();

	/* Broadcast power down irq
	 * This isn't that useful in most cases (only directly wired devices can
	 * use this but still... This will take care of sysdev's as well, so
	 * we exit from here with local irqs disabled and PIC off.
	 */
	ret = device_power_down(PMSG_SUSPEND);
	if (ret) {
		wakeup_decrementer();
		local_irq_enable();
		preempt_enable();
		device_resume();
		broadcast_wake();
		printk(KERN_ERR "Driver powerdown failed\n");
		return -EBUSY;
	}

	/* Wait for completion of async requests */
	while (!batt_req.complete)
		pmu_poll();

	/* Giveup the lazy FPU & vec so we don't have to back them
	 * up from the low level code
	 */
	enable_kernel_fp();

#ifdef CONFIG_ALTIVEC
	if (cpu_has_feature(CPU_FTR_ALTIVEC))
		enable_kernel_altivec();
#endif /* CONFIG_ALTIVEC */

	return 0;
}

static int
pmac_wakeup_devices(void)
{
	mdelay(100);

#ifdef CONFIG_PMAC_BACKLIGHT
	/* Tell backlight code it can use the chip again */
	pmu_backlight_set_sleep(0);
#endif

	/* Power back up system devices (including the PIC) */
	device_power_up();

	/* Force a poll of ADB interrupts */
	adb_int_pending = 1;
	via_pmu_interrupt(0, NULL);

	/* Restart jiffies & scheduling */
	wakeup_decrementer();

	/* Re-enable local CPU interrupts */
	local_irq_enable();
	mdelay(10);
	preempt_enable();

	/* Call platform functions marked "on wake" */
	pmac_pfunc_base_resume();
	pmac_pfunc_i2c_resume();

	/* Resume devices */
	device_resume();

	/* Notify old style drivers */
	broadcast_wake();

	pm_restore_console();

	return 0;
}

#define	GRACKLE_PM	(1<<7)
#define GRACKLE_DOZE	(1<<5)
#define	GRACKLE_NAP	(1<<4)
#define	GRACKLE_SLEEP	(1<<3)

static int powerbook_sleep_grackle(void)
{
	unsigned long save_l2cr;
	unsigned short pmcr1;
	struct adb_request req;
	int ret;
	struct pci_dev *grackle;

	grackle = pci_get_bus_and_slot(0, 0);
	if (!grackle)
		return -ENODEV;

	ret = pmac_suspend_devices();
	if (ret) {
		printk(KERN_ERR "Sleep rejected by devices\n");