via-pmu.c

Linux Kernel 2.6.9 for OMAP1710

	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);
	}
	return ret;
}

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

	npci = 0;
	while ((pd = pci_find_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 __pmac
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 __pmac
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_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
		if (npci-- == 0)
			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 __pmac
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_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
#ifdef HACKED_PCI_SAVE
		int i;
		if (npci-- == 0)
			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  __pmac
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] __pmacdata;

static void __pmac
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 __pmac
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);
}

static int __pmac
pmac_suspend_devices(void)
{
	int ret;
	
	pm_prepare_console();
	
	/* Notify old-style device drivers & userland */
	ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
	if (ret != PBOOK_SLEEP_OK) {
		printk(KERN_ERR "Sleep rejected by drivers\n");
		return -EBUSY;
	}

	/* 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 acheived using the refrigerator for processes
	 * that swsusp uses
	 */
	sys_sync();

	/* Sleep can fail now. May not be very robust but useful for debugging */
	ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
	if (ret != PBOOK_SLEEP_OK) {
		printk(KERN_ERR "Driver sleep failed\n");
		return -EBUSY;
	}

	/* Send suspend call to devices, hold the device core's dpm_sem */
	ret = device_suspend(PM_SUSPEND_MEM);
	if (ret) {
		printk(KERN_ERR "Driver sleep failed\n");
		broadcast_wake();
		return -EBUSY;
	}
	
	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(PM_SUSPEND_MEM);
	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 backlight requests */
	while (!bright_req_1.complete || !bright_req_2.complete ||

			!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 (cur_cpu_spec[0]->cpu_features & CPU_FTR_ALTIVEC)
		enable_kernel_altivec();
#endif /* CONFIG_ALTIVEC */

	return 0;
}

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

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

	pmu_blink(1);

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

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

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

	pmu_blink(1);

	preempt_enable();

	/* 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)

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

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

	ret = pmac_suspend_devices();
	if (ret) {
		printk(KERN_ERR "Sleep rejected by devices\n");
		return ret;
	}
	
	/* Turn off various things. Darwin does some retry tests here... */
	pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
	pmu_wait_complete(&req);
	pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
		PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
	pmu_wait_complete(&req);

	/* For 750, save backside cache setting and disable it */
	save_l2cr = _get_L2CR();	/* (returns -1 if not available) */
	if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
		_set_L2CR(save_l2cr & 0x7fffffff);

	if (!__fake_sleep) {
		/* Ask the PMU to put us to sleep */
		pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
		pmu_wait_complete(&req);
	}

	/* The VIA is supposed not to be restored correctly*/
	save_via_state();
	/* We shut down some HW */
	pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);

	pci_read_config_word(grackle, 0x70, &pmcr1);
	/* Apparently, MacOS uses NAP mode for Grackle ??? */
	pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 
	pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
	pci_write_config_word(grackle, 0x70, pmcr1);

	/* Call low-level ASM sleep handler */
	if (__fake_sleep)
		mdelay(5000);
	else
		low_sleep_handler();

	/* We're awake again, stop grackle PM */
	pci_read_config_word(grackle, 0x70, &pmcr1);
	pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 
	pci_write_config_word(grackle, 0x70, pmcr1);

	/* Make sure the PMU is idle */
	pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
	restore_via_state();
	
	/* Restore L2 cache */
	if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
 		_set_L2CR(save_l2cr);
	
	/* Restore userland MMU context */
	set_context(current->active_mm->context, current->active_mm->pgd);

	/* Power things up */
	pmu_unlock();
	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
	pmu_wait_complete(&req);
	pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
			PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
	pmu_wait_complete(&req);
	pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
			PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
	pmu_wait_complete(&req);

	pmac_wakeup_devices();

	return 0;
}

static int __pmac
powerbook_sleep_Core99(void)
{
	unsigned long save_l2cr;
	unsigned long save_l3cr;
	struct adb_request req;
	int ret;
	
	if (!can_sleep) {
		printk(KERN_ERR "Sleep mode not supported on this machine\n");
		return -ENOSYS;
	}
	
	ret = pmac_suspend_devices();
	if (ret) {
		printk(KERN_ERR "Sleep rejected by devices\n");
		return ret;
	}
	
	/* Tell PMU what events will wake us up */
	pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
		0xff, 0xff);
	pmu_wait_complete(&req);
	pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
		0, PMU_PWR_WAKEUP_KEY |
		(option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
	pmu_wait_complete(&req);

	/* Save & disable L2 and L3 caches*/
	save_l3cr = _get_L3CR();	/* (returns -1 if not available) */
	save_l2cr = _get_L2CR();	/* (returns -1 if not available) */
	if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
		_set_L3CR(save_l3cr & 0x7fffffff);
	if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
		_set_L2CR(save_l2cr & 0x7fffffff);

	/* Save the state of PCI config space for some slots */
	//pbook_pci_save();

	if (!__fake_sleep) {
		/* Ask the PMU to put us to sleep */
		pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
		pmu_wait_complete(&req);
	}

	/* The VIA is supposed not to be restored correctly*/
	save_via_state();

	/* Shut down various ASICs. There's a chance that we can no longer
	 * talk to the PMU after this, so I moved it to _after_ sending the
	 * sleep command to it. Still need to be checked.
	 */
	pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);

	/* Call low-level ASM sleep handler */
	if (__fake_sleep)
		mdelay(5000);
	else
		low_sleep_handler();

	/* Restore Apple core ASICs state */
	pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);

	/* Restore VIA */
	restore_via_state();

	/* Restore PCI config space. This should be overridable by PCI device
	 * drivers as some of them may need special restore code. That's yet
	 * another issue that should be handled by the common code properly,
	 * maybe one day ?
	 */
	/* Don't restore PCI for now, it crashes. Maybe unnecessary on pbook */
	//pbook_pci_restore();

	/* Restore L2 cache */
	if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
 		_set_L2CR(save_l2cr);
	/* Restore L3 cache */
	if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
 		_set_L3CR(save_l3cr);
	
	/* Restore userland MMU context */
	set_context(current->active_mm->context, current->active_mm->pgd);

	/* Tell PMU we are ready */
	pmu_unlock();
	pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
	pmu_wait_complete(&req);
	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
	pmu_wait_complete(&req);

	pmu_blink(1);

	pmac_wakeup_devices();

	return 0;
}

#define PB3400_MEM_CTRL		0xf8000000
#define PB3400_MEM_CTRL_SLEEP	0x70

static int __pmac
powerbook_sleep_3400(void)
{
	int ret, i, x;
	unsigned int hid0;
	unsigned long p;
	struct adb_request sleep_req;
	char *mem_ctrl;
	unsigned int *mem_ctrl_sleep;

	/* first map in the memory contro