drivers/gpio/gpio-amd8111.c

1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (c) 2012 Dmitry Eremin-Solenikov
80 	agp->orig[offset] = ioread8(agp->pm + AMD_REG_GPIO(offset)) &
83 	dev_dbg(&agp->pdev->dev, "Requested gpio %d, data %x\n", offset, agp->orig[offset]);
92 	dev_dbg(&agp->pdev->dev, "Freed gpio %d, data %x\n", offset, agp->orig[offset]);
94 	iowrite8(agp->orig[offset], agp->pm + AMD_REG_GPIO(offset));
103 	spin_lock_irqsave(&agp->lock, flags);
104 	temp = ioread8(agp->pm + AMD_REG_GPIO(offset));
106 	iowrite8(temp, agp->pm + AMD_REG_GPIO(offset));
107 	spin_unlock_irqrestore(&agp->lock, flags);
109 	dev_dbg(&agp->pdev->dev, "Setting gpio %d, value %d, reg=%02x\n", offset, !!value, temp);
119 	temp = ioread8(agp->pm + AMD_REG_GPIO(offset));
121 	dev_dbg(&agp->pdev->dev, "Getting gpio %d, reg=%02x\n", offset, temp);
132 	spin_lock_irqsave(&agp->lock, flags);
133 	temp = ioread8(agp->pm + AMD_REG_GPIO(offset));
135 	iowrite8(temp, agp->pm + AMD_REG_GPIO(offset));
136 	spin_unlock_irqrestore(&agp->lock, flags);
138 	dev_dbg(&agp->pdev->dev, "Dirout gpio %d, value %d, reg=%02x\n", offset, !!value, temp);
149 	spin_lock_irqsave(&agp->lock, flags);
150 	temp = ioread8(agp->pm + AMD_REG_GPIO(offset));
152 	iowrite8(temp, agp->pm + AMD_REG_GPIO(offset));
153 	spin_unlock_irqrestore(&agp->lock, flags);
155 	dev_dbg(&agp->pdev->dev, "Dirin gpio %d, reg=%02x\n", offset, temp);
160 static struct amd_gpio gp = {
164 		.base		= -1,
177 	int err = -ENODEV;
181 	/* We look for our device - AMD South Bridge
199 	err = pci_read_config_dword(pdev, 0x58, &gp.pmbase);
204 	err = -EIO;
205 	gp.pmbase &= 0x0000FF00;
206 	if (gp.pmbase == 0)
208 	if (!devm_request_region(&pdev->dev, gp.pmbase + PMBASE_OFFSET,
210 		dev_err(&pdev->dev, "AMD GPIO region 0x%x already in use!\n",
211 			gp.pmbase + PMBASE_OFFSET);
212 		err = -EBUSY;
215 	gp.pm = ioport_map(gp.pmbase + PMBASE_OFFSET, PMBASE_SIZE);
216 	if (!gp.pm) {
217 		dev_err(&pdev->dev, "Couldn't map io port into io memory\n");
218 		err = -ENOMEM;
221 	gp.pdev = pdev;
222 	gp.chip.parent = &pdev->dev;
224 	spin_lock_init(&gp.lock);
226 	dev_info(&pdev->dev, "AMD-8111 GPIO detected\n");
227 	err = gpiochip_add_data(&gp.chip, &gp);
229 		dev_err(&pdev->dev, "GPIO registering failed (%d)\n", err);
230 		ioport_unmap(gp.pm);
242 	gpiochip_remove(&gp.chip);
243 	ioport_unmap(gp.pm);
244 	pci_dev_put(gp.pdev);