1 // SPDX-License-Identifier: GPL-2.0-only
3  * GPIO driver for the ACCES 104-DIO-48E series
6  * This driver supports the following ACCES devices: 104-DIO-48E and
7  * 104-DIO-24E.
23 #include "gpio-i8255.h"
33 MODULE_PARM_DESC(base, "ACCES 104-DIO-48E base addresses");
38 MODULE_PARM_DESC(irq, "ACCES 104-DIO-48E interrupt line numbers");
110  * struct dio48e_gpio - GPIO device private data structure
125 static void dio48e_regmap_lock(void *lock_arg) __acquires(&dio48egpio->lock)  in dio48e_regmap_lock()
130 	raw_spin_lock_irqsave(&dio48egpio->lock, flags);  in dio48e_regmap_lock()
131 	dio48egpio->flags = flags;  in dio48e_regmap_lock()
134 static void dio48e_regmap_unlock(void *lock_arg) __releases(&dio48egpio->lock)  in dio48e_regmap_unlock()
138 	raw_spin_unlock_irqrestore(&dio48egpio->lock, dio48egpio->flags);  in dio48e_regmap_unlock()
141 static void pit_regmap_lock(void *lock_arg) __acquires(&dio48egpio->lock)  in pit_regmap_lock()
146 	raw_spin_lock_irqsave(&dio48egpio->lock, flags);  in pit_regmap_lock()
147 	dio48egpio->flags = flags;  in pit_regmap_lock()
149 	iowrite8(0x00, dio48egpio->regs + DIO48E_ENABLE_COUNTER_TIMER_ADDRESSING);  in pit_regmap_lock()
152 static void pit_regmap_unlock(void *lock_arg) __releases(&dio48egpio->lock)  in pit_regmap_unlock()
156 	ioread8(dio48egpio->regs + DIO48E_DISABLE_COUNTER_TIMER_ADDRESSING);  in pit_regmap_unlock()
158 	raw_spin_unlock_irqrestore(&dio48egpio->lock, dio48egpio->flags);  in pit_regmap_unlock()
167 	const unsigned int prev_mask = dio48egpio->irq_mask;  in dio48e_handle_mask_sync()
176 	dio48egpio->irq_mask = mask_buf;  in dio48e_handle_mask_sync()
180 		err = regmap_write(dio48egpio->map, DIO48E_CLEAR_INTERRUPT, 0x00);  in dio48e_handle_mask_sync()
183 		return regmap_write(dio48egpio->map, DIO48E_ENABLE_INTERRUPT, 0x00);  in dio48e_handle_mask_sync()
188 		return regmap_read(dio48egpio->map, DIO48E_DISABLE_INTERRUPT, &val);  in dio48e_handle_mask_sync()
195 	"PPI Group 0 Port A 0", "PPI Group 0 Port A 1", "PPI Group 0 Port A 2",
196 	"PPI Group 0 Port A 3", "PPI Group 0 Port A 4", "PPI Group 0 Port A 5",
197 	"PPI Group 0 Port A 6", "PPI Group 0 Port A 7",	"PPI Group 0 Port B 0",
198 	"PPI Group 0 Port B 1", "PPI Group 0 Port B 2", "PPI Group 0 Port B 3",
199 	"PPI Group 0 Port B 4", "PPI Group 0 Port B 5", "PPI Group 0 Port B 6",
200 	"PPI Group 0 Port B 7", "PPI Group 0 Port C 0", "PPI Group 0 Port C 1",
201 	"PPI Group 0 Port C 2", "PPI Group 0 Port C 3", "PPI Group 0 Port C 4",
202 	"PPI Group 0 Port C 5", "PPI Group 0 Port C 6", "PPI Group 0 Port C 7",
203 	"PPI Group 1 Port A 0", "PPI Group 1 Port A 1", "PPI Group 1 Port A 2",
204 	"PPI Group 1 Port A 3", "PPI Group 1 Port A 4", "PPI Group 1 Port A 5",
205 	"PPI Group 1 Port A 6", "PPI Group 1 Port A 7",	"PPI Group 1 Port B 0",
206 	"PPI Group 1 Port B 1", "PPI Group 1 Port B 2", "PPI Group 1 Port B 3",
207 	"PPI Group 1 Port B 4", "PPI Group 1 Port B 5", "PPI Group 1 Port B 6",
208 	"PPI Group 1 Port B 7", "PPI Group 1 Port C 0", "PPI Group 1 Port C 1",
209 	"PPI Group 1 Port C 2", "PPI Group 1 Port C 3", "PPI Group 1 Port C 4",
210 	"PPI Group 1 Port C 5", "PPI Group 1 Port C 6", "PPI Group 1 Port C 7"
236 		dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n",  in dio48e_probe()
238 		return -EBUSY;  in dio48e_probe()
243 		return -ENOMEM;  in dio48e_probe()
247 		return -ENOMEM;  in dio48e_probe()
249 	dio48egpio->regs = regs;  in dio48e_probe()
251 	raw_spin_lock_init(&dio48egpio->lock);  in dio48e_probe()
273 	dio48egpio->map = map;  in dio48e_probe()
295 		return -ENOMEM;  in dio48e_probe()
297 	chip->name = name;  in dio48e_probe()
298 	chip->mask_base = DIO48E_ENABLE_INTERRUPT;  in dio48e_probe()
299 	chip->ack_base = DIO48E_CLEAR_INTERRUPT;  in dio48e_probe()
300 	chip->no_status = true;  in dio48e_probe()
301 	chip->num_regs = 1;  in dio48e_probe()
302 	chip->irqs = dio48e_regmap_irqs;  in dio48e_probe()
303 	chip->num_irqs = ARRAY_SIZE(dio48e_regmap_irqs);  in dio48e_probe()
304 	chip->handle_mask_sync = dio48e_handle_mask_sync;  in dio48e_probe()
305 	chip->irq_drv_data = dio48egpio;  in dio48e_probe()
334 		.name = "104-dio-48e"
340 MODULE_DESCRIPTION("ACCES 104-DIO-48E GPIO driver");