summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/cadence/macb_pci.c
blob: 353393dea6394f47c4d0e267bba025b334083414 (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
132
133
134
// SPDX-License-Identifier: GPL-2.0-only
/**
 * DOC: Cadence GEM PCI wrapper.
 *
 * Copyright (C) 2016 Cadence Design Systems - https://www.cadence.com
 *
 * Authors: Rafal Ozieblo <rafalo@cadence.com>
 *	    Bartosz Folta <bfolta@cadence.com>
 */

#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/etherdevice.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include "macb.h"

#define PCI_DRIVER_NAME "macb_pci"
#define PLAT_DRIVER_NAME "macb"

#define CDNS_VENDOR_ID 0x17cd
#define CDNS_DEVICE_ID 0xe007

#define GEM_PCLK_RATE 50000000
#define GEM_HCLK_RATE 50000000

static int macb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	int err;
	struct platform_device *plat_dev;
	struct platform_device_info plat_info;
	struct macb_platform_data plat_data;
	struct resource res[2];

	/* enable pci device */
	err = pcim_enable_device(pdev);
	if (err < 0) {
		dev_err(&pdev->dev, "Enabling PCI device has failed: %d", err);
		return err;
	}

	pci_set_master(pdev);

	/* set up resources */
	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
	res[0].start = pci_resource_start(pdev, 0);
	res[0].end = pci_resource_end(pdev, 0);
	res[0].name = PCI_DRIVER_NAME;
	res[0].flags = IORESOURCE_MEM;
	res[1].start = pci_irq_vector(pdev, 0);
	res[1].name = PCI_DRIVER_NAME;
	res[1].flags = IORESOURCE_IRQ;

	dev_info(&pdev->dev, "EMAC physical base addr: %pa\n",
		 &res[0].start);

	/* set up macb platform data */
	memset(&plat_data, 0, sizeof(plat_data));

	/* initialize clocks */
	plat_data.pclk = clk_register_fixed_rate(&pdev->dev, "pclk", NULL, 0,
						 GEM_PCLK_RATE);
	if (IS_ERR(plat_data.pclk)) {
		err = PTR_ERR(plat_data.pclk);
		goto err_pclk_register;
	}

	plat_data.hclk = clk_register_fixed_rate(&pdev->dev, "hclk", NULL, 0,
						 GEM_HCLK_RATE);
	if (IS_ERR(plat_data.hclk)) {
		err = PTR_ERR(plat_data.hclk);
		goto err_hclk_register;
	}

	/* set up platform device info */
	memset(&plat_info, 0, sizeof(plat_info));
	plat_info.parent = &pdev->dev;
	plat_info.fwnode = pdev->dev.fwnode;
	plat_info.name = PLAT_DRIVER_NAME;
	plat_info.id = pdev->devfn;
	plat_info.res = res;
	plat_info.num_res = ARRAY_SIZE(res);
	plat_info.data = &plat_data;
	plat_info.size_data = sizeof(plat_data);
	plat_info.dma_mask = pdev->dma_mask;

	/* register platform device */
	plat_dev = platform_device_register_full(&plat_info);
	if (IS_ERR(plat_dev)) {
		err = PTR_ERR(plat_dev);
		goto err_plat_dev_register;
	}

	pci_set_drvdata(pdev, plat_dev);

	return 0;

err_plat_dev_register:
	clk_unregister(plat_data.hclk);

err_hclk_register:
	clk_unregister(plat_data.pclk);

err_pclk_register:
	return err;
}

static void macb_remove(struct pci_dev *pdev)
{
	struct platform_device *plat_dev = pci_get_drvdata(pdev);
	struct macb_platform_data *plat_data = dev_get_platdata(&plat_dev->dev);

	platform_device_unregister(plat_dev);
	clk_unregister(plat_data->pclk);
	clk_unregister(plat_data->hclk);
}

static const struct pci_device_id dev_id_table[] = {
	{ PCI_DEVICE(CDNS_VENDOR_ID, CDNS_DEVICE_ID), },
	{ 0, }
};

static struct pci_driver macb_pci_driver = {
	.name     = PCI_DRIVER_NAME,
	.id_table = dev_id_table,
	.probe    = macb_probe,
	.remove	  = macb_remove,
};

module_pci_driver(macb_pci_driver);
MODULE_DEVICE_TABLE(pci, dev_id_table);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Cadence NIC PCI wrapper");