1 // SPDX-License-Identifier: GPL-2.0-or-later
17     (c) 1999-2002 Gerd Knorr
23     (c) 2005-2006 Nickolay V. Shmyrev
61 #define bgwrite(dat, adr)	writel((dat), bg->mmio+(adr))
62 #define bgread(adr)		readl(bg->mmio+(adr))
65 static int modparam_gpiobase = -1/* dynamic */;
67 MODULE_PARM_DESC(gpiobase, "The GPIO number base. -1 means dynamic, which is the default.");
70 static int bt8xxgpio_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)  in bt8xxgpio_gpio_direction_input()  argument
75 	guard(spinlock_irqsave)(&bg->lock);  in bt8xxgpio_gpio_direction_input()
78 	data &= ~(1 << nr);  in bt8xxgpio_gpio_direction_input()
82 	outen &= ~(1 << nr);  in bt8xxgpio_gpio_direction_input()
88 static int bt8xxgpio_gpio_get(struct gpio_chip *gpio, unsigned nr)  in bt8xxgpio_gpio_get()  argument
93 	guard(spinlock_irqsave)(&bg->lock);  in bt8xxgpio_gpio_get()
97 	return !!(val & (1 << nr));  in bt8xxgpio_gpio_get()
101 					unsigned nr, int val)  in bt8xxgpio_gpio_direction_output()  argument
106 	guard(spinlock_irqsave)(&bg->lock);  in bt8xxgpio_gpio_direction_output()
109 	outen |= (1 << nr);  in bt8xxgpio_gpio_direction_output()
114 		data |= (1 << nr);  in bt8xxgpio_gpio_direction_output()
116 		data &= ~(1 << nr);  in bt8xxgpio_gpio_direction_output()
122 static int bt8xxgpio_gpio_set(struct gpio_chip *gpio, unsigned int nr, int val)  in bt8xxgpio_gpio_set()  argument
127 	guard(spinlock_irqsave)(&bg->lock);  in bt8xxgpio_gpio_set()
131 		data |= (1 << nr);  in bt8xxgpio_gpio_set()
133 		data &= ~(1 << nr);  in bt8xxgpio_gpio_set()
141 	struct gpio_chip *c = &bg->gpio;  in bt8xxgpio_gpio_setup()
143 	c->label = dev_name(&bg->pdev->dev);  in bt8xxgpio_gpio_setup()
144 	c->owner = THIS_MODULE;  in bt8xxgpio_gpio_setup()
145 	c->direction_input = bt8xxgpio_gpio_direction_input;  in bt8xxgpio_gpio_setup()
146 	c->get = bt8xxgpio_gpio_get;  in bt8xxgpio_gpio_setup()
147 	c->direction_output = bt8xxgpio_gpio_direction_output;  in bt8xxgpio_gpio_setup()
148 	c->set = bt8xxgpio_gpio_set;  in bt8xxgpio_gpio_setup()
149 	c->dbg_show = NULL;  in bt8xxgpio_gpio_setup()
150 	c->base = modparam_gpiobase;  in bt8xxgpio_gpio_setup()
151 	c->ngpio = BT8XXGPIO_NR_GPIOS;  in bt8xxgpio_gpio_setup()
152 	c->can_sleep = false;  in bt8xxgpio_gpio_setup()
161 	bg = devm_kzalloc(&dev->dev, sizeof(struct bt8xxgpio), GFP_KERNEL);  in bt8xxgpio_probe()
163 		return -ENOMEM;  in bt8xxgpio_probe()
165 	bg->pdev = dev;  in bt8xxgpio_probe()
166 	spin_lock_init(&bg->lock);  in bt8xxgpio_probe()
170 		dev_err(&dev->dev, "can't enable device.\n");  in bt8xxgpio_probe()
173 	if (!devm_request_mem_region(&dev->dev, pci_resource_start(dev, 0),  in bt8xxgpio_probe()
176 		dev_warn(&dev->dev, "can't request iomem (0x%llx).\n",  in bt8xxgpio_probe()
178 		err = -EBUSY;  in bt8xxgpio_probe()
184 	bg->mmio = devm_ioremap(&dev->dev, pci_resource_start(dev, 0), 0x1000);  in bt8xxgpio_probe()
185 	if (!bg->mmio) {  in bt8xxgpio_probe()
186 		dev_err(&dev->dev, "ioremap() failed\n");  in bt8xxgpio_probe()
187 		err = -EIO;  in bt8xxgpio_probe()
200 	err = gpiochip_add_data(&bg->gpio, bg);  in bt8xxgpio_probe()
202 		dev_err(&dev->dev, "failed to register GPIOs\n");  in bt8xxgpio_probe()
218 	gpiochip_remove(&bg->gpio);  in bt8xxgpio_remove()
232 	scoped_guard(spinlock_irqsave, &bg->lock) {  in bt8xxgpio_suspend()
233 		bg->saved_outen = bgread(BT848_GPIO_OUT_EN);  in bt8xxgpio_suspend()
234 		bg->saved_data = bgread(BT848_GPIO_DATA);  in bt8xxgpio_suspend()
259 	guard(spinlock_irqsave)(&bg->lock);  in bt8xxgpio_resume()
264 	bgwrite(bg->saved_outen, BT848_GPIO_OUT_EN);  in bt8xxgpio_resume()
265 	bgwrite(bg->saved_data & bg->saved_outen,  in bt8xxgpio_resume()