1// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2/* Copyright 2019 NXP */
3
4#include <linux/module.h>
5#include <linux/of.h>
6#include <linux/fsl/ptp_qoriq.h>
7
8#include "enetc.h"
9
10int enetc_phc_index = -1;
11EXPORT_SYMBOL_GPL(enetc_phc_index);
12
13static struct ptp_clock_info enetc_ptp_caps = {
14	.owner		= THIS_MODULE,
15	.name		= "ENETC PTP clock",
16	.max_adj	= 512000,
17	.n_alarm	= 0,
18	.n_ext_ts	= 2,
19	.n_per_out	= 0,
20	.n_pins		= 0,
21	.pps		= 1,
22	.adjfine	= ptp_qoriq_adjfine,
23	.adjtime	= ptp_qoriq_adjtime,
24	.gettime64	= ptp_qoriq_gettime,
25	.settime64	= ptp_qoriq_settime,
26	.enable		= ptp_qoriq_enable,
27};
28
29static int enetc_ptp_probe(struct pci_dev *pdev,
30			   const struct pci_device_id *ent)
31{
32	struct ptp_qoriq *ptp_qoriq;
33	void __iomem *base;
34	int err, len, n;
35
36	if (pdev->dev.of_node && !of_device_is_available(pdev->dev.of_node)) {
37		dev_info(&pdev->dev, "device is disabled, skipping\n");
38		return -ENODEV;
39	}
40
41	err = pci_enable_device_mem(pdev);
42	if (err)
43		return dev_err_probe(&pdev->dev, err, "device enable failed\n");
44
45	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
46	if (err) {
47		dev_err(&pdev->dev, "DMA configuration failed: 0x%x\n", err);
48		goto err_dma;
49	}
50
51	err = pci_request_mem_regions(pdev, KBUILD_MODNAME);
52	if (err) {
53		dev_err(&pdev->dev, "pci_request_regions failed err=%d\n", err);
54		goto err_pci_mem_reg;
55	}
56
57	pci_set_master(pdev);
58
59	ptp_qoriq = kzalloc(sizeof(*ptp_qoriq), GFP_KERNEL);
60	if (!ptp_qoriq) {
61		err = -ENOMEM;
62		goto err_alloc_ptp;
63	}
64
65	len = pci_resource_len(pdev, ENETC_BAR_REGS);
66
67	base = ioremap(pci_resource_start(pdev, ENETC_BAR_REGS), len);
68	if (!base) {
69		err = -ENXIO;
70		dev_err(&pdev->dev, "ioremap() failed\n");
71		goto err_ioremap;
72	}
73
74	/* Allocate 1 interrupt */
75	n = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSIX);
76	if (n != 1) {
77		err = -EPERM;
78		goto err_irq_vectors;
79	}
80
81	ptp_qoriq->irq = pci_irq_vector(pdev, 0);
82
83	err = request_irq(ptp_qoriq->irq, ptp_qoriq_isr, 0, DRIVER, ptp_qoriq);
84	if (err) {
85		dev_err(&pdev->dev, "request_irq() failed!\n");
86		goto err_irq;
87	}
88
89	ptp_qoriq->dev = &pdev->dev;
90
91	err = ptp_qoriq_init(ptp_qoriq, base, &enetc_ptp_caps);
92	if (err)
93		goto err_no_clock;
94
95	enetc_phc_index = ptp_qoriq->phc_index;
96	pci_set_drvdata(pdev, ptp_qoriq);
97
98	return 0;
99
100err_no_clock:
101	free_irq(ptp_qoriq->irq, ptp_qoriq);
102err_irq:
103	pci_free_irq_vectors(pdev);
104err_irq_vectors:
105	iounmap(base);
106err_ioremap:
107	kfree(ptp_qoriq);
108err_alloc_ptp:
109	pci_release_mem_regions(pdev);
110err_pci_mem_reg:
111err_dma:
112	pci_disable_device(pdev);
113
114	return err;
115}
116
117static void enetc_ptp_remove(struct pci_dev *pdev)
118{
119	struct ptp_qoriq *ptp_qoriq = pci_get_drvdata(pdev);
120
121	enetc_phc_index = -1;
122	ptp_qoriq_free(ptp_qoriq);
123	pci_free_irq_vectors(pdev);
124	kfree(ptp_qoriq);
125
126	pci_release_mem_regions(pdev);
127	pci_disable_device(pdev);
128}
129
130static const struct pci_device_id enetc_ptp_id_table[] = {
131	{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_DEV_ID_PTP) },
132	{ 0, } /* End of table. */
133};
134MODULE_DEVICE_TABLE(pci, enetc_ptp_id_table);
135
136static struct pci_driver enetc_ptp_driver = {
137	.name = KBUILD_MODNAME,
138	.id_table = enetc_ptp_id_table,
139	.probe = enetc_ptp_probe,
140	.remove = enetc_ptp_remove,
141};
142module_pci_driver(enetc_ptp_driver);
143
144MODULE_DESCRIPTION("ENETC PTP clock driver");
145MODULE_LICENSE("Dual BSD/GPL");
146