Commit 19971f5e authored by Yangbo Lu's avatar Yangbo Lu Committed by David S. Miller

enetc: add PTP clock driver

This patch is to add PTP clock driver for ENETC.
The driver reused QorIQ PTP clock driver.
Signed-off-by: default avatarYangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ad6e1be6
......@@ -17,3 +17,15 @@ config FSL_ENETC_VF
virtual function (VF) devices enabled by the ENETC PF driver.
If compiled as module (M), the module name is fsl-enetc-vf.
config FSL_ENETC_PTP_CLOCK
tristate "ENETC PTP clock driver"
depends on PTP_1588_CLOCK_QORIQ && (FSL_ENETC || FSL_ENETC_VF)
default y
help
This driver adds support for using the ENETC 1588 timer
as a PTP clock. This clock is only useful if your PTP
programs are getting hardware time stamps on the PTP Ethernet
packets using the SO_TIMESTAMPING API.
If compiled as module (M), the module name is fsl-enetc-ptp.
......@@ -13,3 +13,6 @@ fsl-enetc-vf-$(CONFIG_FSL_ENETC_VF) += enetc.o enetc_cbdr.o \
enetc_ethtool.o
fsl-enetc-vf-objs := enetc_vf.o $(fsl-enetc-vf-y)
endif
obj-$(CONFIG_FSL_ENETC_PTP_CLOCK) += fsl-enetc-ptp.o
fsl-enetc-ptp-$(CONFIG_FSL_ENETC_PTP_CLOCK) += enetc_ptp.o
......@@ -4,8 +4,9 @@
#include <linux/bitops.h>
/* ENETC device IDs */
#define ENETC_DEV_ID_PF 0xe100
#define ENETC_DEV_ID_VF 0xef00
#define ENETC_DEV_ID_PF 0xe100
#define ENETC_DEV_ID_VF 0xef00
#define ENETC_DEV_ID_PTP 0xee02
/* ENETC register block BAR */
#define ENETC_BAR_REGS 0
......
// 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"
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) {
dev_err(&pdev->dev, "device enable failed\n");
return err;
}
/* set up for high or low dma */
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (err) {
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
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;
}
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;
pci_set_drvdata(pdev, ptp_qoriq);
return 0;
err_no_clock:
free_irq(ptp_qoriq->irq, ptp_qoriq);
err_irq:
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);
ptp_qoriq_free(ptp_qoriq);
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");
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