1 // SPDX-License-Identifier: GPL-2.0-only
3  * Driver for the CS5535/CS5536 Multi-Function General Purpose Timers (MFGPT)
6  * Copyright (C) 2007  Andres Salomon <dilinger@debian.org>
20 #define DRV_NAME "cs5535-mfgpt"
52 		return -EIO;  in cs5535_mfgpt_toggle_event()
64 		 * a problem?   -dilinger  in cs5535_mfgpt_toggle_event()
67 		mask = 1 << (timer->nr + 24);  in cs5535_mfgpt_toggle_event()
72 		mask = 1 << (timer->nr + shift);  in cs5535_mfgpt_toggle_event()
77 		mask = 1 << (timer->nr + shift);  in cs5535_mfgpt_toggle_event()
81 		return -EIO;  in cs5535_mfgpt_toggle_event()
104 		return -EIO;  in cs5535_mfgpt_set_irq()
116 	shift = ((cmp == MFGPT_CMP1 ? 0 : 4) + timer->nr % 4) * 4;  in cs5535_mfgpt_set_irq()
118 		return -EIO;  in cs5535_mfgpt_set_irq()
128 		return -EIO;  in cs5535_mfgpt_set_irq()
131 		return -EIO;  in cs5535_mfgpt_set_irq()
133 	/* All chosen and checked - go for it */  in cs5535_mfgpt_set_irq()
135 		return -EIO;  in cs5535_mfgpt_set_irq()
152 	if (!mfgpt->initialized)  in cs5535_mfgpt_alloc_timer()
167 	spin_lock_irqsave(&mfgpt->lock, flags);  in cs5535_mfgpt_alloc_timer()
172 		t = find_first_bit(mfgpt->avail, max);  in cs5535_mfgpt_alloc_timer()
173 		/* set timer_nr to -1 if no timers available */  in cs5535_mfgpt_alloc_timer()
174 		timer_nr = t < max ? (int) t : -1;  in cs5535_mfgpt_alloc_timer()
177 		if (!test_bit(timer_nr, mfgpt->avail))  in cs5535_mfgpt_alloc_timer()
178 			timer_nr = -1;  in cs5535_mfgpt_alloc_timer()
182 		/* if timer_nr is not -1, it's an available timer */  in cs5535_mfgpt_alloc_timer()
183 		__clear_bit(timer_nr, mfgpt->avail);  in cs5535_mfgpt_alloc_timer()
184 	spin_unlock_irqrestore(&mfgpt->lock, flags);  in cs5535_mfgpt_alloc_timer()
192 		spin_lock_irqsave(&mfgpt->lock, flags);  in cs5535_mfgpt_alloc_timer()
193 		__set_bit(timer_nr, mfgpt->avail);  in cs5535_mfgpt_alloc_timer()
194 		spin_unlock_irqrestore(&mfgpt->lock, flags);  in cs5535_mfgpt_alloc_timer()
197 	timer->chip = mfgpt;  in cs5535_mfgpt_alloc_timer()
198 	timer->nr = timer_nr;  in cs5535_mfgpt_alloc_timer()
199 	dev_info(&mfgpt->pdev->dev, "registered timer %d\n", timer_nr);  in cs5535_mfgpt_alloc_timer()
209  * out a way to actually release the hardware timer.  See comments below.
219 		spin_lock_irqsave(&timer->chip->lock, flags);  in cs5535_mfgpt_free_timer()
220 		__set_bit(timer->nr, timer->chip->avail);  in cs5535_mfgpt_free_timer()
221 		spin_unlock_irqrestore(&timer->chip->lock, flags);  in cs5535_mfgpt_free_timer()
230 	return inw(timer->chip->base + reg + (timer->nr * 8));  in cs5535_mfgpt_read()
237 	outw(value, timer->chip->base + reg + (timer->nr * 8));  in cs5535_mfgpt_write()
245  * whether or not this secret MSR can be used to release individual timers.
302 	spin_lock_irqsave(&mfgpt->lock, flags);  in scan_timers()
307 			__set_bit(i, mfgpt->avail);  in scan_timers()
311 	spin_unlock_irqrestore(&mfgpt->lock, flags);  in scan_timers()
319 	int err = -EIO, t;  in cs5535_mfgpt_probe()
322 		dev_err(&pdev->dev, "Bad mfgpt_reset_timers value: %i\n",  in cs5535_mfgpt_probe()
336 		dev_err(&pdev->dev, "can't fetch device resource info\n");  in cs5535_mfgpt_probe()
340 	if (!request_region(res->start, resource_size(res), pdev->name)) {  in cs5535_mfgpt_probe()
341 		dev_err(&pdev->dev, "can't request region\n");  in cs5535_mfgpt_probe()
345 	/* set up the driver-specific struct */  in cs5535_mfgpt_probe()
346 	cs5535_mfgpt_chip.base = res->start;  in cs5535_mfgpt_probe()
350 	dev_info(&pdev->dev, "reserved resource region %pR\n", res);  in cs5535_mfgpt_probe()
354 	dev_info(&pdev->dev, "%d MFGPT timers available\n", t);  in cs5535_mfgpt_probe()