1 // SPDX-License-Identifier: GPL-2.0-or-later
17     (c) 1999-2002 Gerd Knorr
23     (c) 2005-2006 Nickolay V. Shmyrev
60 #define bgwrite(dat, adr)	writel((dat), bg->mmio+(adr))
61 #define bgread(adr)		readl(bg->mmio+(adr))
64 static int modparam_gpiobase = -1/* dynamic */;
66 MODULE_PARM_DESC(gpiobase, "The GPIO number base. -1 means dynamic, which is the default.");
69 static int bt8xxgpio_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)  in bt8xxgpio_gpio_direction_input()  argument
75 	spin_lock_irqsave(&bg->lock, flags);  in bt8xxgpio_gpio_direction_input()
78 	data &= ~(1 << nr);  in bt8xxgpio_gpio_direction_input()
82 	outen &= ~(1 << nr);  in bt8xxgpio_gpio_direction_input()
85 	spin_unlock_irqrestore(&bg->lock, flags);  in bt8xxgpio_gpio_direction_input()
90 static int bt8xxgpio_gpio_get(struct gpio_chip *gpio, unsigned nr)  in bt8xxgpio_gpio_get()  argument
96 	spin_lock_irqsave(&bg->lock, flags);  in bt8xxgpio_gpio_get()
98 	spin_unlock_irqrestore(&bg->lock, flags);  in bt8xxgpio_gpio_get()
100 	return !!(val & (1 << nr));  in bt8xxgpio_gpio_get()
104 					unsigned nr, int val)  in bt8xxgpio_gpio_direction_output()  argument
110 	spin_lock_irqsave(&bg->lock, flags);  in bt8xxgpio_gpio_direction_output()
113 	outen |= (1 << nr);  in bt8xxgpio_gpio_direction_output()
118 		data |= (1 << nr);  in bt8xxgpio_gpio_direction_output()
120 		data &= ~(1 << nr);  in bt8xxgpio_gpio_direction_output()
123 	spin_unlock_irqrestore(&bg->lock, flags);  in bt8xxgpio_gpio_direction_output()
129 			    unsigned nr, int val)  in bt8xxgpio_gpio_set()  argument
135 	spin_lock_irqsave(&bg->lock, flags);  in bt8xxgpio_gpio_set()
139 		data |= (1 << nr);  in bt8xxgpio_gpio_set()
141 		data &= ~(1 << nr);  in bt8xxgpio_gpio_set()
144 	spin_unlock_irqrestore(&bg->lock, flags);  in bt8xxgpio_gpio_set()
149 	struct gpio_chip *c = &bg->gpio;  in bt8xxgpio_gpio_setup()
151 	c->label = dev_name(&bg->pdev->dev);  in bt8xxgpio_gpio_setup()
152 	c->owner = THIS_MODULE;  in bt8xxgpio_gpio_setup()
153 	c->direction_input = bt8xxgpio_gpio_direction_input;  in bt8xxgpio_gpio_setup()
154 	c->get = bt8xxgpio_gpio_get;  in bt8xxgpio_gpio_setup()
155 	c->direction_output = bt8xxgpio_gpio_direction_output;  in bt8xxgpio_gpio_setup()
156 	c->set = bt8xxgpio_gpio_set;  in bt8xxgpio_gpio_setup()
157 	c->dbg_show = NULL;  in bt8xxgpio_gpio_setup()
158 	c->base = modparam_gpiobase;  in bt8xxgpio_gpio_setup()
159 	c->ngpio = BT8XXGPIO_NR_GPIOS;  in bt8xxgpio_gpio_setup()
160 	c->can_sleep = false;  in bt8xxgpio_gpio_setup()
169 	bg = devm_kzalloc(&dev->dev, sizeof(struct bt8xxgpio), GFP_KERNEL);  in bt8xxgpio_probe()
171 		return -ENOMEM;  in bt8xxgpio_probe()
173 	bg->pdev = dev;  in bt8xxgpio_probe()
174 	spin_lock_init(&bg->lock);  in bt8xxgpio_probe()
178 		dev_err(&dev->dev, "can't enable device.\n");  in bt8xxgpio_probe()
181 	if (!devm_request_mem_region(&dev->dev, pci_resource_start(dev, 0),  in bt8xxgpio_probe()
184 		dev_warn(&dev->dev, "can't request iomem (0x%llx).\n",  in bt8xxgpio_probe()
186 		err = -EBUSY;  in bt8xxgpio_probe()
192 	bg->mmio = devm_ioremap(&dev->dev, pci_resource_start(dev, 0), 0x1000);  in bt8xxgpio_probe()
193 	if (!bg->mmio) {  in bt8xxgpio_probe()
194 		dev_err(&dev->dev, "ioremap() failed\n");  in bt8xxgpio_probe()
195 		err = -EIO;  in bt8xxgpio_probe()
208 	err = gpiochip_add_data(&bg->gpio, bg);  in bt8xxgpio_probe()
210 		dev_err(&dev->dev, "failed to register GPIOs\n");  in bt8xxgpio_probe()
226 	gpiochip_remove(&bg->gpio);  in bt8xxgpio_remove()
241 	spin_lock_irqsave(&bg->lock, flags);  in bt8xxgpio_suspend()
243 	bg->saved_outen = bgread(BT848_GPIO_OUT_EN);  in bt8xxgpio_suspend()
244 	bg->saved_data = bgread(BT848_GPIO_DATA);  in bt8xxgpio_suspend()
250 	spin_unlock_irqrestore(&bg->lock, flags);  in bt8xxgpio_suspend()
271 	spin_lock_irqsave(&bg->lock, flags);  in bt8xxgpio_resume()
276 	bgwrite(bg->saved_outen, BT848_GPIO_OUT_EN);  in bt8xxgpio_resume()
277 	bgwrite(bg->saved_data & bg->saved_outen,  in bt8xxgpio_resume()
280 	spin_unlock_irqrestore(&bg->lock, flags);  in bt8xxgpio_resume()