drivers/gpio/gpio-merrifield.c

   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
  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
  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         base = pcim_iomap_region(pdev, 1, pci_name(pdev));
  82         if (IS_ERR(base))
  83                 return dev_err_probe(dev, PTR_ERR(base), "I/O memory mapping error\n");
  84
  85         irq_base = readl(base + 0 * sizeof(u32));
  86         gpio_base = readl(base + 1 * sizeof(u32));
  87
  88         /* Release the IO mapping, since we already get the info from BAR1 */
  89         pcim_iounmap_region(pdev, 1);
  90
  91         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
  92         if (!priv)
  93                 return -ENOMEM;
  94
  95         priv->dev = dev;
  96         priv->reg_base = pcim_iomap_region(pdev, 0, pci_name(pdev));
  97         if (IS_ERR(priv->reg_base))
  98                 return dev_err_probe(dev, PTR_ERR(priv->reg_base),
  99                                 "I/O memory mapping error\n");
 100
 101         priv->pin_info.pin_ranges = mrfld_gpio_ranges;
 102         priv->pin_info.nranges = ARRAY_SIZE(mrfld_gpio_ranges);
 103         priv->pin_info.name = mrfld_gpio_get_pinctrl_dev_name(priv);
 104         if (!priv->pin_info.name)
 105                 return -ENOMEM;
 106
 107         priv->info.base = gpio_base;
 108         priv->info.ngpio = MRFLD_NGPIO;
 109         priv->info.first = irq_base;
 110
 111         retval = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
 112         if (retval < 0)
 113                 return retval;
 114
 115         priv->irq = pci_irq_vector(pdev, 0);
 116
 117         priv->wake_regs.gwmr = GWMR_MRFLD;
 118         priv->wake_regs.gwsr = GWSR_MRFLD;
 119         priv->wake_regs.gsir = GSIR_MRFLD;
 120
 121         retval = devm_tng_gpio_probe(dev, priv);
 122         if (retval)
 123                 return dev_err_probe(dev, retval, "tng_gpio_probe error\n");
 124
 125         pci_set_drvdata(pdev, priv);
 126         return 0;
 127 }
 128
 129 static const struct pci_device_id mrfld_gpio_ids[] = {
 130         { PCI_VDEVICE(INTEL, 0x1199) },
 131         { }
 132 };
 133 MODULE_DEVICE_TABLE(pci, mrfld_gpio_ids);
 134
 135 static struct pci_driver mrfld_gpio_driver = {
 136         .name           = "gpio-merrifield",
 137         .id_table       = mrfld_gpio_ids,
 138         .probe          = mrfld_gpio_probe,
 139 };
 140 module_pci_driver(mrfld_gpio_driver);
 141
 142 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
 143 MODULE_DESCRIPTION("Intel Merrifield SoC GPIO driver");
 144 MODULE_LICENSE("GPL v2");
 145 MODULE_IMPORT_NS("GPIO_TANGIER");