2  * GPIO driver for the ACCES 104-IDI-48 family
14  * This driver supports the following ACCES devices: 104-IDI-48A,
15  * 104-IDI-48AC, 104-IDI-48B, and 104-IDI-48BC.
38 MODULE_PARM_DESC(base, "ACCES 104-IDI-48 base addresses");
42 MODULE_PARM_DESC(irq, "ACCES 104-IDI-48 interrupt line numbers");
45  * struct idi_48_gpio - GPIO device private data structure
51  * @cos_enb:	Change-Of-State IRQ enable boundaries mask
80 	for (i = 0; i < 48; i += 8)  in idi_48_gpio_get()
83 			mask = BIT(offset - i);  in idi_48_gpio_get()
85 			return !!(inb(idi48gpio->base + base_offset) & mask);  in idi_48_gpio_get()
88 	/* The following line should never execute since offset < 48 */  in idi_48_gpio_get()
103 	const unsigned long port_mask = GENMASK(gpio_reg_size - 1, 0);  in idi_48_gpio_get_multiple()
107 	bitmap_zero(bits, chip->ngpio);  in idi_48_gpio_get_multiple()
128 		port_state = inb(idi48gpio->base + ports[i]);  in idi_48_gpio_get_multiple()
151 	for (i = 0; i < 48; i += 8)  in idi_48_irq_mask()
153 			mask = BIT(offset - i);  in idi_48_irq_mask()
156 			idi48gpio->irq_mask[boundary] &= ~mask;  in idi_48_irq_mask()
158 			if (!idi48gpio->irq_mask[boundary]) {  in idi_48_irq_mask()
159 				idi48gpio->cos_enb &= ~BIT(boundary);  in idi_48_irq_mask()
161 				raw_spin_lock_irqsave(&idi48gpio->lock, flags);  in idi_48_irq_mask()
163 				outb(idi48gpio->cos_enb, idi48gpio->base + 7);  in idi_48_irq_mask()
165 				raw_spin_unlock_irqrestore(&idi48gpio->lock,  in idi_48_irq_mask()
184 	for (i = 0; i < 48; i += 8)  in idi_48_irq_unmask()
186 			mask = BIT(offset - i);  in idi_48_irq_unmask()
188 			prev_irq_mask = idi48gpio->irq_mask[boundary];  in idi_48_irq_unmask()
190 			idi48gpio->irq_mask[boundary] |= mask;  in idi_48_irq_unmask()
193 				idi48gpio->cos_enb |= BIT(boundary);  in idi_48_irq_unmask()
195 				raw_spin_lock_irqsave(&idi48gpio->lock, flags);  in idi_48_irq_unmask()
197 				outb(idi48gpio->cos_enb, idi48gpio->base + 7);  in idi_48_irq_unmask()
199 				raw_spin_unlock_irqrestore(&idi48gpio->lock,  in idi_48_irq_unmask()
209 	/* The only valid irq types are none and both-edges */  in idi_48_irq_set_type()
212 		return -EINVAL;  in idi_48_irq_set_type()
218 	.name = "104-idi-48",
233 	struct gpio_chip *const chip = &idi48gpio->chip;  in idi_48_irq_handler()
235 	spin_lock(&idi48gpio->ack_lock);  in idi_48_irq_handler()
237 	raw_spin_lock(&idi48gpio->lock);  in idi_48_irq_handler()
239 	cos_status = inb(idi48gpio->base + 7);  in idi_48_irq_handler()
241 	raw_spin_unlock(&idi48gpio->lock);  in idi_48_irq_handler()
243 	/* IRQ Status (bit 6) is active low (0 = IRQ generated by device) */  in idi_48_irq_handler()
244 	if (cos_status & BIT(6)) {  in idi_48_irq_handler()
245 		spin_unlock(&idi48gpio->ack_lock);  in idi_48_irq_handler()
249 	/* Bit 0-5 indicate which Change-Of-State boundary triggered the IRQ */  in idi_48_irq_handler()
253 		irq_mask = idi48gpio->irq_mask[boundary];  in idi_48_irq_handler()
258 			generic_handle_irq(irq_find_mapping(chip->irq.domain,  in idi_48_irq_handler()
263 	spin_unlock(&idi48gpio->ack_lock);  in idi_48_irq_handler()
268 #define IDI48_NGPIO 48
270 	"Bit 0 A", "Bit 1 A", "Bit 2 A", "Bit 3 A", "Bit 4 A", "Bit 5 A",
271 	"Bit 6 A", "Bit 7 A", "Bit 8 A", "Bit 9 A", "Bit 10 A", "Bit 11 A",
272 	"Bit 12 A", "Bit 13 A", "Bit 14 A", "Bit 15 A",	"Bit 16 A", "Bit 17 A",
273 	"Bit 18 A", "Bit 19 A", "Bit 20 A", "Bit 21 A", "Bit 22 A", "Bit 23 A",
274 	"Bit 0 B", "Bit 1 B", "Bit 2 B", "Bit 3 B", "Bit 4 B", "Bit 5 B",
275 	"Bit 6 B", "Bit 7 B", "Bit 8 B", "Bit 9 B", "Bit 10 B", "Bit 11 B",
276 	"Bit 12 B", "Bit 13 B", "Bit 14 B", "Bit 15 B",	"Bit 16 B", "Bit 17 B",
277 	"Bit 18 B", "Bit 19 B", "Bit 20 B", "Bit 21 B", "Bit 22 B", "Bit 23 B"
288 		return -ENOMEM;  in idi_48_probe()
291 		dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n",  in idi_48_probe()
293 		return -EBUSY;  in idi_48_probe()
296 	idi48gpio->chip.label = name;  in idi_48_probe()
297 	idi48gpio->chip.parent = dev;  in idi_48_probe()
298 	idi48gpio->chip.owner = THIS_MODULE;  in idi_48_probe()
299 	idi48gpio->chip.base = -1;  in idi_48_probe()
300 	idi48gpio->chip.ngpio = IDI48_NGPIO;  in idi_48_probe()
301 	idi48gpio->chip.names = idi48_names;  in idi_48_probe()
302 	idi48gpio->chip.get_direction = idi_48_gpio_get_direction;  in idi_48_probe()
303 	idi48gpio->chip.direction_input = idi_48_gpio_direction_input;  in idi_48_probe()
304 	idi48gpio->chip.get = idi_48_gpio_get;  in idi_48_probe()
305 	idi48gpio->chip.get_multiple = idi_48_gpio_get_multiple;  in idi_48_probe()
306 	idi48gpio->base = base[id];  in idi_48_probe()
308 	raw_spin_lock_init(&idi48gpio->lock);  in idi_48_probe()
309 	spin_lock_init(&idi48gpio->ack_lock);  in idi_48_probe()
311 	err = devm_gpiochip_add_data(dev, &idi48gpio->chip, idi48gpio);  in idi_48_probe()
321 	err = gpiochip_irqchip_add(&idi48gpio->chip, &idi_48_irqchip, 0,  in idi_48_probe()
341 		.name = "104-idi-48"
347 MODULE_DESCRIPTION("ACCES 104-IDI-48 GPIO driver");