146 lines
3.2 KiB
C
146 lines
3.2 KiB
C
// 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(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");
|