1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Intel Merrifield SoC GPIO driver
  4 *
  5 * Copyright (c) 2016, 2023 Intel Corporation.
  6 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
  7 */
  8
  9#include <linux/acpi.h>
 10#include <linux/bitops.h>
 11#include <linux/device.h>
 12#include <linux/err.h>
 13#include <linux/io.h>
 14#include <linux/module.h>
 15#include <linux/pci.h>
 16#include <linux/types.h>
 17
 18#include "gpio-tangier.h"
 19
 20/* Intel Merrifield has 192 GPIO pins */
 21#define MRFLD_NGPIO	192
 22
 23static const struct tng_gpio_pinrange mrfld_gpio_ranges[] = {
 24	GPIO_PINRANGE(0, 11, 146),
 25	GPIO_PINRANGE(12, 13, 144),
 26	GPIO_PINRANGE(14, 15, 35),
 27	GPIO_PINRANGE(16, 16, 164),
 28	GPIO_PINRANGE(17, 18, 105),
 29	GPIO_PINRANGE(19, 22, 101),
 30	GPIO_PINRANGE(23, 30, 107),
 31	GPIO_PINRANGE(32, 43, 67),
 32	GPIO_PINRANGE(44, 63, 195),
 33	GPIO_PINRANGE(64, 67, 140),
 34	GPIO_PINRANGE(68, 69, 165),
 35	GPIO_PINRANGE(70, 71, 65),
 36	GPIO_PINRANGE(72, 76, 228),
 37	GPIO_PINRANGE(77, 86, 37),
 38	GPIO_PINRANGE(87, 87, 48),
 39	GPIO_PINRANGE(88, 88, 47),
 40	GPIO_PINRANGE(89, 96, 49),
 41	GPIO_PINRANGE(97, 97, 34),
 42	GPIO_PINRANGE(102, 119, 83),
 43	GPIO_PINRANGE(120, 123, 79),
 44	GPIO_PINRANGE(124, 135, 115),
 45	GPIO_PINRANGE(137, 142, 158),
 46	GPIO_PINRANGE(154, 163, 24),
 47	GPIO_PINRANGE(164, 176, 215),
 48	GPIO_PINRANGE(177, 189, 127),
 49	GPIO_PINRANGE(190, 191, 178),
 50};
 51
 52static const char *mrfld_gpio_get_pinctrl_dev_name(struct tng_gpio *priv)
 53{
 54	struct device *dev = priv->dev;
 55	struct acpi_device *adev;
 56	const char *name;
 57
 58	adev = acpi_dev_get_first_match_dev("INTC1002", NULL, -1);
 59	if (adev) {
 60		name = devm_kstrdup(dev, acpi_dev_name(adev), GFP_KERNEL);
 61		acpi_dev_put(adev);
 62	} else {
 63		name = "pinctrl-merrifield";
 64	}
 65
 66	return name;
 67}
 68
 69static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 70{
 71	struct device *dev = &pdev->dev;
 72	struct tng_gpio *priv;
 73	u32 gpio_base, irq_base;
 74	void __iomem *base;
 75	int retval;
 76
 77	retval = pcim_enable_device(pdev);
 78	if (retval)
 79		return retval;
 80
 81	retval = pcim_iomap_regions(pdev, BIT(1) | BIT(0), pci_name(pdev));
 82	if (retval)
 83		return dev_err_probe(dev, retval, "I/O memory mapping error\n");
 84
 85	base = pcim_iomap_table(pdev)[1];
 86
 87	irq_base = readl(base + 0 * sizeof(u32));
 88	gpio_base = readl(base + 1 * sizeof(u32));
 89
 90	/* Release the IO mapping, since we already get the info from BAR1 */
 91	pcim_iounmap_regions(pdev, BIT(1));
 92
 93	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 94	if (!priv)
 95		return -ENOMEM;
 96
 97	priv->dev = dev;
 98	priv->reg_base = pcim_iomap_table(pdev)[0];
 99
100	priv->pin_info.pin_ranges = mrfld_gpio_ranges;
101	priv->pin_info.nranges = ARRAY_SIZE(mrfld_gpio_ranges);
102	priv->pin_info.name = mrfld_gpio_get_pinctrl_dev_name(priv);
103	if (!priv->pin_info.name)
104		return -ENOMEM;
105
106	priv->info.base = gpio_base;
107	priv->info.ngpio = MRFLD_NGPIO;
108	priv->info.first = irq_base;
109
110	retval = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
111	if (retval < 0)
112		return retval;
113
114	priv->irq = pci_irq_vector(pdev, 0);
115
116	priv->wake_regs.gwmr = GWMR_MRFLD;
117	priv->wake_regs.gwsr = GWSR_MRFLD;
118	priv->wake_regs.gsir = GSIR_MRFLD;
119
120	retval = devm_tng_gpio_probe(dev, priv);
121	if (retval)
122		return dev_err_probe(dev, retval, "tng_gpio_probe error\n");
123
124	pci_set_drvdata(pdev, priv);
125	return 0;
126}
127
128static const struct pci_device_id mrfld_gpio_ids[] = {
129	{ PCI_VDEVICE(INTEL, 0x1199) },
130	{ }
131};
132MODULE_DEVICE_TABLE(pci, mrfld_gpio_ids);
133
134static struct pci_driver mrfld_gpio_driver = {
135	.name		= "gpio-merrifield",
136	.id_table	= mrfld_gpio_ids,
137	.probe		= mrfld_gpio_probe,
138};
139module_pci_driver(mrfld_gpio_driver);
140
141MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
142MODULE_DESCRIPTION("Intel Merrifield SoC GPIO driver");
143MODULE_LICENSE("GPL v2");
144MODULE_IMPORT_NS(GPIO_TANGIER);