xref: /linux/drivers/gpio/gpio-merrifield.c (revision 1ac731c529cd4d6adbce134754b51ff7d822b145)
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 
23 static 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 
mrfld_gpio_get_pinctrl_dev_name(struct tng_gpio * priv)52 static 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 
mrfld_gpio_probe(struct pci_dev * pdev,const struct pci_device_id * id)69 static 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 
128 static const struct pci_device_id mrfld_gpio_ids[] = {
129 	{ PCI_VDEVICE(INTEL, 0x1199) },
130 	{ }
131 };
132 MODULE_DEVICE_TABLE(pci, mrfld_gpio_ids);
133 
134 static struct pci_driver mrfld_gpio_driver = {
135 	.name		= "gpio-merrifield",
136 	.id_table	= mrfld_gpio_ids,
137 	.probe		= mrfld_gpio_probe,
138 };
139 module_pci_driver(mrfld_gpio_driver);
140 
141 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
142 MODULE_DESCRIPTION("Intel Merrifield SoC GPIO driver");
143 MODULE_LICENSE("GPL v2");
144 MODULE_IMPORT_NS(GPIO_TANGIER);
145