1// SPDX-License-Identifier: GPL-2.0
2/*
3 * AD7606 Parallel Interface ADC driver
4 *
5 * Copyright 2011 Analog Devices Inc.
6 */
7
8#include <linux/mod_devicetable.h>
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/types.h>
12#include <linux/err.h>
13#include <linux/io.h>
14
15#include <linux/iio/iio.h>
16#include "ad7606.h"
17
18static int ad7606_par16_read_block(struct device *dev,
19				   int count, void *buf)
20{
21	struct iio_dev *indio_dev = dev_get_drvdata(dev);
22	struct ad7606_state *st = iio_priv(indio_dev);
23
24	insw((unsigned long)st->base_address, buf, count);
25
26	return 0;
27}
28
29static const struct ad7606_bus_ops ad7606_par16_bops = {
30	.read_block = ad7606_par16_read_block,
31};
32
33static int ad7606_par8_read_block(struct device *dev,
34				  int count, void *buf)
35{
36	struct iio_dev *indio_dev = dev_get_drvdata(dev);
37	struct ad7606_state *st = iio_priv(indio_dev);
38
39	insb((unsigned long)st->base_address, buf, count * 2);
40
41	return 0;
42}
43
44static const struct ad7606_bus_ops ad7606_par8_bops = {
45	.read_block = ad7606_par8_read_block,
46};
47
48static int ad7606_par_probe(struct platform_device *pdev)
49{
50	const struct platform_device_id *id = platform_get_device_id(pdev);
51	struct resource *res;
52	void __iomem *addr;
53	resource_size_t remap_size;
54	int irq;
55
56	irq = platform_get_irq(pdev, 0);
57	if (irq < 0)
58		return irq;
59
60	addr = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
61	if (IS_ERR(addr))
62		return PTR_ERR(addr);
63
64	remap_size = resource_size(res);
65
66	return ad7606_probe(&pdev->dev, irq, addr,
67			    id->name, id->driver_data,
68			    remap_size > 1 ? &ad7606_par16_bops :
69			    &ad7606_par8_bops);
70}
71
72static const struct platform_device_id ad7606_driver_ids[] = {
73	{ .name	= "ad7605-4", .driver_data = ID_AD7605_4, },
74	{ .name	= "ad7606-4", .driver_data = ID_AD7606_4, },
75	{ .name	= "ad7606-6", .driver_data = ID_AD7606_6, },
76	{ .name	= "ad7606-8", .driver_data = ID_AD7606_8, },
77	{ }
78};
79MODULE_DEVICE_TABLE(platform, ad7606_driver_ids);
80
81static const struct of_device_id ad7606_of_match[] = {
82	{ .compatible = "adi,ad7605-4" },
83	{ .compatible = "adi,ad7606-4" },
84	{ .compatible = "adi,ad7606-6" },
85	{ .compatible = "adi,ad7606-8" },
86	{ },
87};
88MODULE_DEVICE_TABLE(of, ad7606_of_match);
89
90static struct platform_driver ad7606_driver = {
91	.probe = ad7606_par_probe,
92	.id_table = ad7606_driver_ids,
93	.driver = {
94		.name = "ad7606",
95		.pm = AD7606_PM_OPS,
96		.of_match_table = ad7606_of_match,
97	},
98};
99module_platform_driver(ad7606_driver);
100
101MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
102MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
103MODULE_LICENSE("GPL v2");
104MODULE_IMPORT_NS(IIO_AD7606);
105