drivers/char/ppdev.c

108 static inline void pp_enable_irq(struct pp_struct *pp)
110 	struct parport *port = pp->pdev->port;
119 	struct pp_struct *pp = file->private_data;
125 	if (!(pp->flags & PP_CLAIMED)) {
138 	pport = pp->pdev->port;
141 	parport_set_timeout(pp->pdev,
144 			    pp->default_inactivity);
154 			if (pp->flags & PP_W91284PIC)
156 			if (pp->flags & PP_FASTREAD)
183 	parport_set_timeout(pp->pdev, pp->default_inactivity);
189 	pp_enable_irq(pp);
197 	struct pp_struct *pp = file->private_data;
204 	if (!(pp->flags & PP_CLAIMED)) {
214 	pport = pp->pdev->port;
217 	parport_set_timeout(pp->pdev,
220 			    pp->default_inactivity);
230 		if ((pp->flags & PP_FASTWRITE) && (mode == IEEE1284_MODE_EPP)) {
240 			wrote = parport_write(pp->pdev->port, kbuffer, n);
263 	parport_set_timeout(pp->pdev, pp->default_inactivity);
266 	pp_enable_irq(pp);
272 	struct pp_struct *pp = private;
274 	if (pp->irqresponse) {
275 		parport_write_control(pp->pdev->port, pp->irqctl);
276 		pp->irqresponse = 0;
279 	atomic_inc(&pp->irqc);
280 	wake_up_interruptible(&pp->irq_wait);
283 static int register_device(int minor, struct pp_struct *pp)
311 	ppdev_cb.flags = (pp->flags & PP_EXCL) ? PARPORT_FLAG_EXCL : 0;
312 	ppdev_cb.private = pp;
322 	pp->pdev = pdev;
323 	pp->index = index;
362 	struct pp_struct *pp = file->private_data;
378 		if (pp->flags & PP_CLAIMED) {
379 			dev_dbg(&pp->pdev->dev, "you've already got it!\n");
384 		if (!pp->pdev) {
385 			int err = register_device(minor, pp);
391 		ret = parport_claim_or_block(pp->pdev);
395 		pp->flags |= PP_CLAIMED;
399 		pp_enable_irq(pp);
402 		info = &pp->pdev->port->ieee1284;
403 		pp->saved_state.mode = info->mode;
404 		pp->saved_state.phase = info->phase;
405 		info->mode = pp->state.mode;
406 		info->phase = pp->state.phase;
407 		pp->default_inactivity = parport_set_timeout(pp->pdev, 0);
408 		parport_set_timeout(pp->pdev, pp->default_inactivity);
413 		if (pp->pdev) {
414 			dev_dbg(&pp->pdev->dev,
416 			if (pp->flags & PP_EXCL)
425 		pp->flags |= PP_EXCL;
434 		pp->state.mode = mode;
435 		pp->state.phase = init_phase(mode);
437 		if (pp->flags & PP_CLAIMED) {
438 			pp->pdev->port->ieee1284.mode = mode;
439 			pp->pdev->port->ieee1284.phase = pp->state.phase;
448 		if (pp->flags & PP_CLAIMED)
449 			mode = pp->pdev->port->ieee1284.mode;
451 			mode = pp->state.mode;
465 		pp->state.phase = phase;
467 		if (pp->flags & PP_CLAIMED)
468 			pp->pdev->port->ieee1284.phase = phase;
476 		if (pp->flags & PP_CLAIMED)
477 			phase = pp->pdev->port->ieee1284.phase;
479 			phase = pp->state.phase;
504 		pp->flags &= ~PP_FLAGMASK;
505 		pp->flags |= (uflags & PP_FLAGMASK);
512 		uflags = pp->flags & PP_FLAGMASK;
521 	if ((pp->flags & PP_CLAIMED) == 0) {
526 	port = pp->pdev->port;
544 		parport_yield_blocking(pp->pdev);
549 		info = &pp->pdev->port->ieee1284;
550 		pp->state.mode = info->mode;
551 		pp->state.phase = info->phase;
552 		info->mode = pp->saved_state.mode;
553 		info->phase = pp->saved_state.phase;
554 		parport_release(pp->pdev);
555 		pp->flags &= ~PP_CLAIMED;
601 		pp_enable_irq(pp);
610 		pp->irqctl = reg;
611 		pp->irqresponse = 1;
615 		ret = atomic_read(&pp->irqc);
618 		atomic_sub(ret, &pp->irqc);
628 		return pp_set_timeout(pp->pdev, time32[0], time32[1]);
640 		return pp_set_timeout(pp->pdev, time64[0], time64[1]);
643 		jiffies_to_timespec64(pp->pdev->timeout, &ts);
653 		jiffies_to_timespec64(pp->pdev->timeout, &ts);
666 		dev_dbg(&pp->pdev->dev, "What? (cmd=0x%x)\n", cmd);
687 	struct pp_struct *pp;
692 	pp = kmalloc(sizeof(struct pp_struct), GFP_KERNEL);
693 	if (!pp)
696 	pp->state.mode = IEEE1284_MODE_COMPAT;
697 	pp->state.phase = init_phase(pp->state.mode);
698 	pp->flags = 0;
699 	pp->irqresponse = 0;
700 	atomic_set(&pp->irqc, 0);
701 	init_waitqueue_head(&pp->irq_wait);
707 	pp->pdev = NULL;
708 	file->private_data = pp;
716 	struct pp_struct *pp = file->private_data;
720 	if (!(pp->flags & PP_CLAIMED) && pp->pdev &&
721 	    (pp->state.mode != IEEE1284_MODE_COMPAT)) {
725 		parport_claim_or_block(pp->pdev);
726 		pp->flags |= PP_CLAIMED;
727 		info = &pp->pdev->port->ieee1284;
728 		pp->saved_state.mode = info->mode;
729 		pp->saved_state.phase = info->phase;
730 		info->mode = pp->state.mode;
731 		info->phase = pp->state.phase;
733 	} else if ((pp->flags & PP_CLAIMED) && pp->pdev &&
734 	    (pp->pdev->port->ieee1284.mode != IEEE1284_MODE_COMPAT)) {
738 		parport_negotiate(pp->pdev->port, IEEE1284_MODE_COMPAT);
739 		dev_dbg(&pp->pdev->dev,
743 	if ((pp->flags & PP_CLAIMED) && pp->pdev) {
746 		info = &pp->pdev->port->ieee1284;
747 		pp->state.mode = info->mode;
748 		pp->state.phase = info->phase;
749 		info->mode = pp->saved_state.mode;
750 		info->phase = pp->saved_state.phase;
751 		parport_release(pp->pdev);
758 	if (pp->pdev) {
759 		parport_unregister_device(pp->pdev);
760 		ida_free(&ida_index, pp->index);
761 		pp->pdev = NULL;
765 	kfree(pp);
773 	struct pp_struct *pp = file->private_data;
776 	poll_wait(file, &pp->irq_wait, wait);
777 	if (atomic_read(&pp->irqc))