summaryrefslogtreecommitdiff
path: root/drivers/net/can/ctucanfd/ctucanfd_platform.c
blob: 89d54c2151e190fe407b1060310bbccde987bfbb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
// SPDX-License-Identifier: GPL-2.0-or-later
/*******************************************************************************
 *
 * CTU CAN FD IP Core
 *
 * Copyright (C) 2015-2018 Ondrej Ille <ondrej.ille@gmail.com> FEE CTU
 * Copyright (C) 2018-2021 Ondrej Ille <ondrej.ille@gmail.com> self-funded
 * Copyright (C) 2018-2019 Martin Jerabek <martin.jerabek01@gmail.com> FEE CTU
 * Copyright (C) 2018-2022 Pavel Pisa <pisa@cmp.felk.cvut.cz> FEE CTU/self-funded
 *
 * Project advisors:
 *     Jiri Novak <jnovak@fel.cvut.cz>
 *     Pavel Pisa <pisa@cmp.felk.cvut.cz>
 *
 * Department of Measurement         (http://meas.fel.cvut.cz/)
 * Faculty of Electrical Engineering (http://www.fel.cvut.cz)
 * Czech Technical University        (http://www.cvut.cz/)
 ******************************************************************************/

#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>

#include "ctucanfd.h"

#define DRV_NAME	"ctucanfd"

static void ctucan_platform_set_drvdata(struct device *dev,
					struct net_device *ndev)
{
	struct platform_device *pdev = container_of(dev, struct platform_device,
						    dev);

	platform_set_drvdata(pdev, ndev);
}

/**
 * ctucan_platform_probe - Platform registration call
 * @pdev:	Handle to the platform device structure
 *
 * This function does all the memory allocation and registration for the CAN
 * device.
 *
 * Return: 0 on success and failure value on error
 */
static int ctucan_platform_probe(struct platform_device *pdev)
{
	struct resource *res; /* IO mem resources */
	struct device	*dev = &pdev->dev;
	void __iomem *addr;
	int ret;
	unsigned int ntxbufs;
	int irq;

	/* Get the virtual base address for the device */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	addr = devm_ioremap_resource(dev, res);
	if (IS_ERR(addr)) {
		dev_err(dev, "Cannot remap address.\n");
		ret = PTR_ERR(addr);
		goto err;
	}
	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		ret = irq;
		goto err;
	}

	/* Number of tx bufs might be change in HW for future. If so,
	 * it will be passed as property via device tree
	 */
	ntxbufs = 4;
	ret = ctucan_probe_common(dev, addr, irq, ntxbufs, 0,
				  1, ctucan_platform_set_drvdata);

	if (ret < 0)
		platform_set_drvdata(pdev, NULL);

err:
	return ret;
}

/**
 * ctucan_platform_remove - Unregister the device after releasing the resources
 * @pdev:	Handle to the platform device structure
 *
 * This function frees all the resources allocated to the device.
 * Return: 0 always
 */
static int ctucan_platform_remove(struct platform_device *pdev)
{
	struct net_device *ndev = platform_get_drvdata(pdev);
	struct ctucan_priv *priv = netdev_priv(ndev);

	netdev_dbg(ndev, "ctucan_remove");

	unregister_candev(ndev);
	pm_runtime_disable(&pdev->dev);
	netif_napi_del(&priv->napi);
	free_candev(ndev);

	return 0;
}

static SIMPLE_DEV_PM_OPS(ctucan_platform_pm_ops, ctucan_suspend, ctucan_resume);

/* Match table for OF platform binding */
static const struct of_device_id ctucan_of_match[] = {
	{ .compatible = "ctu,ctucanfd-2", },
	{ .compatible = "ctu,ctucanfd", },
	{ /* end of list */ },
};
MODULE_DEVICE_TABLE(of, ctucan_of_match);

static struct platform_driver ctucanfd_driver = {
	.probe	= ctucan_platform_probe,
	.remove	= ctucan_platform_remove,
	.driver	= {
		.name = DRV_NAME,
		.pm = &ctucan_platform_pm_ops,
		.of_match_table	= ctucan_of_match,
	},
};

module_platform_driver(ctucanfd_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Martin Jerabek");
MODULE_DESCRIPTION("CTU CAN FD for platform");