11802d0beSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
202e74fc0SWilliam Breathitt Gray /*
302e74fc0SWilliam Breathitt Gray * GPIO driver for the ACCES PCI-IDIO-16
402e74fc0SWilliam Breathitt Gray * Copyright (C) 2017 William Breathitt Gray
502e74fc0SWilliam Breathitt Gray */
6e7f758faSWilliam Breathitt Gray #include <linux/bits.h>
702e74fc0SWilliam Breathitt Gray #include <linux/device.h>
8*73d8f3efSWilliam Breathitt Gray #include <linux/err.h>
9*73d8f3efSWilliam Breathitt Gray #include <linux/irq.h>
1002e74fc0SWilliam Breathitt Gray #include <linux/kernel.h>
1102e74fc0SWilliam Breathitt Gray #include <linux/module.h>
1202e74fc0SWilliam Breathitt Gray #include <linux/pci.h>
13*73d8f3efSWilliam Breathitt Gray #include <linux/regmap.h>
1402e74fc0SWilliam Breathitt Gray #include <linux/types.h>
1502e74fc0SWilliam Breathitt Gray
16e7f758faSWilliam Breathitt Gray #include "gpio-idio-16.h"
1702e74fc0SWilliam Breathitt Gray
18*73d8f3efSWilliam Breathitt Gray static const struct regmap_range idio_16_wr_ranges[] = {
19*73d8f3efSWilliam Breathitt Gray regmap_reg_range(0x0, 0x2), regmap_reg_range(0x3, 0x4),
20*73d8f3efSWilliam Breathitt Gray };
21*73d8f3efSWilliam Breathitt Gray static const struct regmap_range idio_16_rd_ranges[] = {
22*73d8f3efSWilliam Breathitt Gray regmap_reg_range(0x1, 0x2), regmap_reg_range(0x5, 0x6),
23*73d8f3efSWilliam Breathitt Gray };
24*73d8f3efSWilliam Breathitt Gray static const struct regmap_range idio_16_precious_ranges[] = {
25*73d8f3efSWilliam Breathitt Gray regmap_reg_range(0x2, 0x2),
26*73d8f3efSWilliam Breathitt Gray };
27*73d8f3efSWilliam Breathitt Gray static const struct regmap_access_table idio_16_wr_table = {
28*73d8f3efSWilliam Breathitt Gray .yes_ranges = idio_16_wr_ranges,
29*73d8f3efSWilliam Breathitt Gray .n_yes_ranges = ARRAY_SIZE(idio_16_wr_ranges),
30*73d8f3efSWilliam Breathitt Gray };
31*73d8f3efSWilliam Breathitt Gray static const struct regmap_access_table idio_16_rd_table = {
32*73d8f3efSWilliam Breathitt Gray .yes_ranges = idio_16_rd_ranges,
33*73d8f3efSWilliam Breathitt Gray .n_yes_ranges = ARRAY_SIZE(idio_16_rd_ranges),
34*73d8f3efSWilliam Breathitt Gray };
35*73d8f3efSWilliam Breathitt Gray static const struct regmap_access_table idio_16_precious_table = {
36*73d8f3efSWilliam Breathitt Gray .yes_ranges = idio_16_precious_ranges,
37*73d8f3efSWilliam Breathitt Gray .n_yes_ranges = ARRAY_SIZE(idio_16_precious_ranges),
38*73d8f3efSWilliam Breathitt Gray };
39*73d8f3efSWilliam Breathitt Gray static const struct regmap_config idio_16_regmap_config = {
40*73d8f3efSWilliam Breathitt Gray .reg_bits = 8,
41*73d8f3efSWilliam Breathitt Gray .reg_stride = 1,
42*73d8f3efSWilliam Breathitt Gray .val_bits = 8,
43*73d8f3efSWilliam Breathitt Gray .io_port = true,
44*73d8f3efSWilliam Breathitt Gray .wr_table = &idio_16_wr_table,
45*73d8f3efSWilliam Breathitt Gray .rd_table = &idio_16_rd_table,
46*73d8f3efSWilliam Breathitt Gray .volatile_table = &idio_16_rd_table,
47*73d8f3efSWilliam Breathitt Gray .precious_table = &idio_16_precious_table,
48*73d8f3efSWilliam Breathitt Gray .cache_type = REGCACHE_FLAT,
49*73d8f3efSWilliam Breathitt Gray .use_raw_spinlock = true,
5002e74fc0SWilliam Breathitt Gray };
5102e74fc0SWilliam Breathitt Gray
52*73d8f3efSWilliam Breathitt Gray /* Only input lines (GPIO 16-31) support interrupts */
53*73d8f3efSWilliam Breathitt Gray #define IDIO_16_REGMAP_IRQ(_id) \
54*73d8f3efSWilliam Breathitt Gray [16 + _id] = { \
55*73d8f3efSWilliam Breathitt Gray .mask = BIT(2), \
56*73d8f3efSWilliam Breathitt Gray .type = { .types_supported = IRQ_TYPE_EDGE_BOTH }, \
5702e74fc0SWilliam Breathitt Gray }
5802e74fc0SWilliam Breathitt Gray
59*73d8f3efSWilliam Breathitt Gray static const struct regmap_irq idio_16_regmap_irqs[] = {
60*73d8f3efSWilliam Breathitt Gray IDIO_16_REGMAP_IRQ(0), IDIO_16_REGMAP_IRQ(1), IDIO_16_REGMAP_IRQ(2), /* 0-2 */
61*73d8f3efSWilliam Breathitt Gray IDIO_16_REGMAP_IRQ(3), IDIO_16_REGMAP_IRQ(4), IDIO_16_REGMAP_IRQ(5), /* 3-5 */
62*73d8f3efSWilliam Breathitt Gray IDIO_16_REGMAP_IRQ(6), IDIO_16_REGMAP_IRQ(7), IDIO_16_REGMAP_IRQ(8), /* 6-8 */
63*73d8f3efSWilliam Breathitt Gray IDIO_16_REGMAP_IRQ(9), IDIO_16_REGMAP_IRQ(10), IDIO_16_REGMAP_IRQ(11), /* 9-11 */
64*73d8f3efSWilliam Breathitt Gray IDIO_16_REGMAP_IRQ(12), IDIO_16_REGMAP_IRQ(13), IDIO_16_REGMAP_IRQ(14), /* 12-14 */
65*73d8f3efSWilliam Breathitt Gray IDIO_16_REGMAP_IRQ(15), /* 15 */
6602e74fc0SWilliam Breathitt Gray };
6702e74fc0SWilliam Breathitt Gray
idio_16_probe(struct pci_dev * pdev,const struct pci_device_id * id)6802e74fc0SWilliam Breathitt Gray static int idio_16_probe(struct pci_dev *pdev, const struct pci_device_id *id)
6902e74fc0SWilliam Breathitt Gray {
7002e74fc0SWilliam Breathitt Gray struct device *const dev = &pdev->dev;
7102e74fc0SWilliam Breathitt Gray int err;
72deab2b05SWilliam Breathitt Gray const size_t pci_bar_index = 2;
7302e74fc0SWilliam Breathitt Gray const char *const name = pci_name(pdev);
74*73d8f3efSWilliam Breathitt Gray struct idio_16_regmap_config config = {};
75*73d8f3efSWilliam Breathitt Gray void __iomem *regs;
76*73d8f3efSWilliam Breathitt Gray struct regmap *map;
7702e74fc0SWilliam Breathitt Gray
7802e74fc0SWilliam Breathitt Gray err = pcim_enable_device(pdev);
7902e74fc0SWilliam Breathitt Gray if (err) {
8002e74fc0SWilliam Breathitt Gray dev_err(dev, "Failed to enable PCI device (%d)\n", err);
8102e74fc0SWilliam Breathitt Gray return err;
8202e74fc0SWilliam Breathitt Gray }
8302e74fc0SWilliam Breathitt Gray
84deab2b05SWilliam Breathitt Gray err = pcim_iomap_regions(pdev, BIT(pci_bar_index), name);
8502e74fc0SWilliam Breathitt Gray if (err) {
8602e74fc0SWilliam Breathitt Gray dev_err(dev, "Unable to map PCI I/O addresses (%d)\n", err);
8702e74fc0SWilliam Breathitt Gray return err;
8802e74fc0SWilliam Breathitt Gray }
8902e74fc0SWilliam Breathitt Gray
90*73d8f3efSWilliam Breathitt Gray regs = pcim_iomap_table(pdev)[pci_bar_index];
9102e74fc0SWilliam Breathitt Gray
92*73d8f3efSWilliam Breathitt Gray map = devm_regmap_init_mmio(dev, regs, &idio_16_regmap_config);
93*73d8f3efSWilliam Breathitt Gray if (IS_ERR(map))
94*73d8f3efSWilliam Breathitt Gray return dev_err_probe(dev, PTR_ERR(map), "Unable to initialize register map\n");
9502e74fc0SWilliam Breathitt Gray
96*73d8f3efSWilliam Breathitt Gray config.parent = dev;
97*73d8f3efSWilliam Breathitt Gray config.map = map;
98*73d8f3efSWilliam Breathitt Gray config.regmap_irqs = idio_16_regmap_irqs;
99*73d8f3efSWilliam Breathitt Gray config.num_regmap_irqs = ARRAY_SIZE(idio_16_regmap_irqs);
100*73d8f3efSWilliam Breathitt Gray config.irq = pdev->irq;
101*73d8f3efSWilliam Breathitt Gray config.filters = true;
10202e74fc0SWilliam Breathitt Gray
103*73d8f3efSWilliam Breathitt Gray return devm_idio_16_regmap_register(dev, &config);
10402e74fc0SWilliam Breathitt Gray }
10502e74fc0SWilliam Breathitt Gray
10602e74fc0SWilliam Breathitt Gray static const struct pci_device_id idio_16_pci_dev_id[] = {
107fd254a23SWilliam Breathitt Gray { PCI_DEVICE(0x494F, 0x0DC8) }, { 0 }
10802e74fc0SWilliam Breathitt Gray };
10902e74fc0SWilliam Breathitt Gray MODULE_DEVICE_TABLE(pci, idio_16_pci_dev_id);
11002e74fc0SWilliam Breathitt Gray
11102e74fc0SWilliam Breathitt Gray static struct pci_driver idio_16_driver = {
11202e74fc0SWilliam Breathitt Gray .name = "pci-idio-16",
11302e74fc0SWilliam Breathitt Gray .id_table = idio_16_pci_dev_id,
11402e74fc0SWilliam Breathitt Gray .probe = idio_16_probe
11502e74fc0SWilliam Breathitt Gray };
11602e74fc0SWilliam Breathitt Gray
11702e74fc0SWilliam Breathitt Gray module_pci_driver(idio_16_driver);
11802e74fc0SWilliam Breathitt Gray
11902e74fc0SWilliam Breathitt Gray MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>");
12002e74fc0SWilliam Breathitt Gray MODULE_DESCRIPTION("ACCES PCI-IDIO-16 GPIO driver");
12102e74fc0SWilliam Breathitt Gray MODULE_LICENSE("GPL v2");
122e7f758faSWilliam Breathitt Gray MODULE_IMPORT_NS(GPIO_IDIO_16);
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