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
135
136
137
138
139
140
141
142
143
144
145
|
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/* Copyright 2019 NXP */
#include <linux/module.h>
#include <linux/of.h>
#include <linux/fsl/ptp_qoriq.h>
#include "enetc.h"
int enetc_phc_index = -1;
EXPORT_SYMBOL_GPL(enetc_phc_index);
static struct ptp_clock_info enetc_ptp_caps = {
.owner = THIS_MODULE,
.name = "ENETC PTP clock",
.max_adj = 512000,
.n_alarm = 0,
.n_ext_ts = 2,
.n_per_out = 0,
.n_pins = 0,
.pps = 1,
.adjfine = ptp_qoriq_adjfine,
.adjtime = ptp_qoriq_adjtime,
.gettime64 = ptp_qoriq_gettime,
.settime64 = ptp_qoriq_settime,
.enable = ptp_qoriq_enable,
};
static int enetc_ptp_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct ptp_qoriq *ptp_qoriq;
void __iomem *base;
int err, len, n;
if (pdev->dev.of_node && !of_device_is_available(pdev->dev.of_node)) {
dev_info(&pdev->dev, "device is disabled, skipping\n");
return -ENODEV;
}
err = pci_enable_device_mem(pdev);
if (err)
return dev_err_probe(&pdev->dev, err, "device enable failed\n");
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (err) {
dev_err(&pdev->dev, "DMA configuration failed: 0x%x\n", err);
goto err_dma;
}
err = pci_request_mem_regions(pdev, KBUILD_MODNAME);
if (err) {
dev_err(&pdev->dev, "pci_request_regions failed err=%d\n", err);
goto err_pci_mem_reg;
}
pci_set_master(pdev);
ptp_qoriq = kzalloc(sizeof(*ptp_qoriq), GFP_KERNEL);
if (!ptp_qoriq) {
err = -ENOMEM;
goto err_alloc_ptp;
}
len = pci_resource_len(pdev, ENETC_BAR_REGS);
base = ioremap(pci_resource_start(pdev, ENETC_BAR_REGS), len);
if (!base) {
err = -ENXIO;
dev_err(&pdev->dev, "ioremap() failed\n");
goto err_ioremap;
}
/* Allocate 1 interrupt */
n = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSIX);
if (n != 1) {
err = -EPERM;
goto err_irq_vectors;
}
ptp_qoriq->irq = pci_irq_vector(pdev, 0);
err = request_irq(ptp_qoriq->irq, ptp_qoriq_isr, 0, DRIVER, ptp_qoriq);
if (err) {
dev_err(&pdev->dev, "request_irq() failed!\n");
goto err_irq;
}
ptp_qoriq->dev = &pdev->dev;
err = ptp_qoriq_init(ptp_qoriq, base, &enetc_ptp_caps);
if (err)
goto err_no_clock;
enetc_phc_index = ptp_qoriq->phc_index;
pci_set_drvdata(pdev, ptp_qoriq);
return 0;
err_no_clock:
free_irq(ptp_qoriq->irq, ptp_qoriq);
err_irq:
pci_free_irq_vectors(pdev);
err_irq_vectors:
iounmap(base);
err_ioremap:
kfree(ptp_qoriq);
err_alloc_ptp:
pci_release_mem_regions(pdev);
err_pci_mem_reg:
err_dma:
pci_disable_device(pdev);
return err;
}
static void enetc_ptp_remove(struct pci_dev *pdev)
{
struct ptp_qoriq *ptp_qoriq = pci_get_drvdata(pdev);
enetc_phc_index = -1;
ptp_qoriq_free(ptp_qoriq);
pci_free_irq_vectors(pdev);
kfree(ptp_qoriq);
pci_release_mem_regions(pdev);
pci_disable_device(pdev);
}
static const struct pci_device_id enetc_ptp_id_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_DEV_ID_PTP) },
{ 0, } /* End of table. */
};
MODULE_DEVICE_TABLE(pci, enetc_ptp_id_table);
static struct pci_driver enetc_ptp_driver = {
.name = KBUILD_MODNAME,
.id_table = enetc_ptp_id_table,
.probe = enetc_ptp_probe,
.remove = enetc_ptp_remove,
};
module_pci_driver(enetc_ptp_driver);
MODULE_DESCRIPTION("ENETC PTP clock driver");
MODULE_LICENSE("Dual BSD/GPL");
|
