drivers/char/hpet.c

106 	struct hpet_dev *devp;
109 	devp = data;
110 	isr = 1 << (devp - devp->hd_hpets->hp_dev);
112 	if ((devp->hd_flags & HPET_SHARED_IRQ) &&
113 	    !(isr & readl(&devp->hd_hpet->hpet_isr)))
117 	devp->hd_irqdata++;
123 	if ((devp->hd_flags & (HPET_IE | HPET_PERIODIC)) == HPET_IE) {
125 		struct hpet __iomem *hpet = devp->hd_hpet;
126 		struct hpets *hpetp = devp->hd_hpets;
128 		t = devp->hd_ireqfreq;
129 		read_counter(&devp->hd_timer->hpet_compare);
149 			      &devp->hd_timer->hpet_compare);
152 	if (devp->hd_flags & HPET_SHARED_IRQ)
153 		writel(isr, &devp->hd_hpet->hpet_isr);
156 	wake_up_interruptible(&devp->hd_waitqueue);
158 	kill_fasync(&devp->hd_async_queue, SIGIO, POLL_IN);
163 static void hpet_timer_set_irq(struct hpet_dev *devp)
170 	if (devp->hd_hdwirq) {
175 	timer = devp->hd_timer;
216 		devp->hd_hdwirq = gsi;
224 	struct hpet_dev *devp;
234 	for (devp = NULL, hpetp = hpets; hpetp && !devp; hpetp = hpetp->hp_next)
239 				devp = &hpetp->hp_dev[i];
243 	if (!devp) {
249 	file->private_data = devp;
250 	devp->hd_irqdata = 0;
251 	devp->hd_flags |= HPET_OPEN;
255 	hpet_timer_set_irq(devp);
266 	struct hpet_dev *devp;
268 	devp = file->private_data;
269 	if (!devp->hd_ireqfreq)
275 	add_wait_queue(&devp->hd_waitqueue, &wait);
281 		data = devp->hd_irqdata;
282 		devp->hd_irqdata = 0;
302 	remove_wait_queue(&devp->hd_waitqueue, &wait);
310 	struct hpet_dev *devp;
312 	devp = file->private_data;
314 	if (!devp->hd_ireqfreq)
317 	poll_wait(file, &devp->hd_waitqueue, wait);
320 	v = devp->hd_irqdata;
346 	struct hpet_dev *devp;
352 	devp = file->private_data;
353 	addr = devp->hd_hpets->hp_hpet_phys;
370 	struct hpet_dev *devp;
372 	devp = file->private_data;
374 	if (fasync_helper(fd, file, on, &devp->hd_async_queue) >= 0)
382 	struct hpet_dev *devp;
386 	devp = file->private_data;
387 	timer = devp->hd_timer;
394 	irq = devp->hd_irq;
395 	devp->hd_irq = 0;
397 	devp->hd_ireqfreq = 0;
399 	if (devp->hd_flags & HPET_PERIODIC
408 	devp->hd_flags &= ~(HPET_OPEN | HPET_IE | HPET_PERIODIC);
412 		free_irq(irq, devp);
418 static int hpet_ioctl_ieon(struct hpet_dev *devp)
427 	timer = devp->hd_timer;
428 	hpet = devp->hd_hpet;
429 	hpetp = devp->hd_hpets;
431 	if (!devp->hd_ireqfreq)
436 	if (devp->hd_flags & HPET_IE) {
441 	devp->hd_flags |= HPET_IE;
444 		devp->hd_flags |= HPET_SHARED_IRQ;
447 	irq = devp->hd_hdwirq;
452 		if (devp->hd_flags & HPET_SHARED_IRQ) {
463 			isr = 1 << (devp - devp->hd_hpets->hp_dev);
467 		sprintf(devp->hd_name, "hpet%d", (int)(devp - hpetp->hp_dev));
468 		irq_flags = devp->hd_flags & HPET_SHARED_IRQ ? IRQF_SHARED : 0;
470 				devp->hd_name, (void *)devp)) {
478 		devp->hd_flags ^= HPET_IE;
483 	devp->hd_irq = irq;
484 	t = devp->hd_ireqfreq;
492 	if (devp->hd_flags & HPET_PERIODIC) {
518 	if (devp->hd_flags & HPET_SHARED_IRQ) {
519 		isr = 1 << (devp - devp->hd_hpets->hp_dev);
539 hpet_ioctl_common(struct hpet_dev *devp, unsigned int cmd, unsigned long arg,
553 		timer = devp->hd_timer;
554 		hpetp = devp->hd_hpets;
557 		return hpet_ioctl_ieon(devp);
566 		if ((devp->hd_flags & HPET_IE) == 0)
571 		if (devp->hd_irq) {
572 			free_irq(devp->hd_irq, devp);
573 			devp->hd_irq = 0;
575 		devp->hd_flags ^= HPET_IE;
580 			if (devp->hd_ireqfreq)
582 					hpet_time_div(hpetp, devp->hd_ireqfreq);
586 			info->hi_timer = devp - hpetp->hp_dev;
595 		devp->hd_flags |= HPET_PERIODIC;
603 		if (devp->hd_flags & HPET_PERIODIC &&
609 		devp->hd_flags &= ~HPET_PERIODIC;
623 		devp->hd_ireqfreq = hpet_time_div(hpetp, arg);
726 	struct hpet_dev *devp;
730 	for (j = 0, devp = hpetp->hp_dev; j < hpetp->hp_ntimer; j++, devp++)
731 		if ((devp->hd_flags & HPET_OPEN) == 0) {
732 			timer = devp->hd_timer;
782 	struct hpet_dev *devp;
866 	for (i = 0, devp = hpetp->hp_dev; i < hpetp->hp_ntimer; i++, devp++) {
869 		timer = &hpet->hpet_timers[devp - hpetp->hp_dev];
871 		devp->hd_hpets = hpetp;
872 		devp->hd_hpet = hpet;
873 		devp->hd_timer = timer;
880 			devp->hd_flags = HPET_OPEN;
884 		init_waitqueue_head(&devp->hd_waitqueue);