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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2013-2016 Freescale Semiconductor Inc.
* Copyright 2016-2018 NXP
* Copyright 2020 NXP
*/
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/msi.h>
#include <linux/fsl/mc.h>
#include "dpaa2-ptp.h"
static int dpaa2_ptp_enable(struct ptp_clock_info *ptp,
struct ptp_clock_request *rq, int on)
{
struct ptp_qoriq *ptp_qoriq = container_of(ptp, struct ptp_qoriq, caps);
struct fsl_mc_device *mc_dev;
struct device *dev;
u32 mask = 0;
u32 bit;
int err;
dev = ptp_qoriq->dev;
mc_dev = to_fsl_mc_device(dev);
switch (rq->type) {
case PTP_CLK_REQ_EXTTS:
switch (rq->extts.index) {
case 0:
bit = DPRTC_EVENT_ETS1;
break;
case 1:
bit = DPRTC_EVENT_ETS2;
break;
default:
return -EINVAL;
}
if (on)
extts_clean_up(ptp_qoriq, rq->extts.index, false);
break;
case PTP_CLK_REQ_PPS:
bit = DPRTC_EVENT_PPS;
break;
default:
return -EOPNOTSUPP;
}
err = dprtc_get_irq_mask(mc_dev->mc_io, 0, mc_dev->mc_handle,
DPRTC_IRQ_INDEX, &mask);
if (err < 0) {
dev_err(dev, "dprtc_get_irq_mask(): %d\n", err);
return err;
}
if (on)
mask |= bit;
else
mask &= ~bit;
err = dprtc_set_irq_mask(mc_dev->mc_io, 0, mc_dev->mc_handle,
DPRTC_IRQ_INDEX, mask);
if (err < 0) {
dev_err(dev, "dprtc_set_irq_mask(): %d\n", err);
return err;
}
return 0;
}
static const struct ptp_clock_info dpaa2_ptp_caps = {
.owner = THIS_MODULE,
.name = "DPAA2 PTP Clock",
.max_adj = 512000,
.n_alarm = 2,
.n_ext_ts = 2,
.n_per_out = 3,
.n_pins = 0,
.pps = 1,
.adjfine = ptp_qoriq_adjfine,
.adjtime = ptp_qoriq_adjtime,
.gettime64 = ptp_qoriq_gettime,
.settime64 = ptp_qoriq_settime,
.enable = dpaa2_ptp_enable,
};
static irqreturn_t dpaa2_ptp_irq_handler_thread(int irq, void *priv)
{
struct ptp_qoriq *ptp_qoriq = priv;
struct ptp_clock_event event;
struct fsl_mc_device *mc_dev;
struct device *dev;
u32 status = 0;
int err;
dev = ptp_qoriq->dev;
mc_dev = to_fsl_mc_device(dev);
err = dprtc_get_irq_status(mc_dev->mc_io, 0, mc_dev->mc_handle,
DPRTC_IRQ_INDEX, &status);
if (unlikely(err)) {
dev_err(dev, "dprtc_get_irq_status err %d\n", err);
return IRQ_NONE;
}
if (status & DPRTC_EVENT_PPS) {
event.type = PTP_CLOCK_PPS;
ptp_clock_event(ptp_qoriq->clock, &event);
}
if (status & DPRTC_EVENT_ETS1)
extts_clean_up(ptp_qoriq, 0, true);
if (status & DPRTC_EVENT_ETS2)
extts_clean_up(ptp_qoriq, 1, true);
err = dprtc_clear_irq_status(mc_dev->mc_io, 0, mc_dev->mc_handle,
DPRTC_IRQ_INDEX, status);
if (unlikely(err)) {
dev_err(dev, "dprtc_clear_irq_status err %d\n", err);
return IRQ_NONE;
}
return IRQ_HANDLED;
}
static int dpaa2_ptp_probe(struct fsl_mc_device *mc_dev)
{
struct device *dev = &mc_dev->dev;
struct fsl_mc_device_irq *irq;
struct ptp_qoriq *ptp_qoriq;
struct device_node *node;
void __iomem *base;
int err;
ptp_qoriq = devm_kzalloc(dev, sizeof(*ptp_qoriq), GFP_KERNEL);
if (!ptp_qoriq)
return -ENOMEM;
err = fsl_mc_portal_allocate(mc_dev, 0, &mc_dev->mc_io);
if (err) {
if (err == -ENXIO)
err = -EPROBE_DEFER;
else
dev_err(dev, "fsl_mc_portal_allocate err %d\n", err);
goto err_exit;
}
err = dprtc_open(mc_dev->mc_io, 0, mc_dev->obj_desc.id,
&mc_dev->mc_handle);
if (err) {
dev_err(dev, "dprtc_open err %d\n", err);
goto err_free_mcp;
}
ptp_qoriq->dev = dev;
node = of_find_compatible_node(NULL, NULL, "fsl,dpaa2-ptp");
if (!node) {
err = -ENODEV;
goto err_close;
}
dev->of_node = node;
base = of_iomap(node, 0);
if (!base) {
err = -ENOMEM;
goto err_put;
}
err = fsl_mc_allocate_irqs(mc_dev);
if (err) {
dev_err(dev, "MC irqs allocation failed\n");
goto err_unmap;
}
irq = mc_dev->irqs[0];
ptp_qoriq->irq = irq->msi_desc->irq;
err = request_threaded_irq(ptp_qoriq->irq, NULL,
dpaa2_ptp_irq_handler_thread,
IRQF_NO_SUSPEND | IRQF_ONESHOT,
dev_name(dev), ptp_qoriq);
if (err < 0) {
dev_err(dev, "devm_request_threaded_irq(): %d\n", err);
goto err_free_mc_irq;
}
err = dprtc_set_irq_enable(mc_dev->mc_io, 0, mc_dev->mc_handle,
DPRTC_IRQ_INDEX, 1);
if (err < 0) {
dev_err(dev, "dprtc_set_irq_enable(): %d\n", err);
goto err_free_threaded_irq;
}
err = ptp_qoriq_init(ptp_qoriq, base, &dpaa2_ptp_caps);
if (err)
goto err_free_threaded_irq;
dpaa2_phc_index = ptp_qoriq->phc_index;
dpaa2_ptp = ptp_qoriq;
dev_set_drvdata(dev, ptp_qoriq);
return 0;
err_free_threaded_irq:
free_irq(ptp_qoriq->irq, ptp_qoriq);
err_free_mc_irq:
fsl_mc_free_irqs(mc_dev);
err_unmap:
iounmap(base);
err_put:
of_node_put(node);
err_close:
dprtc_close(mc_dev->mc_io, 0, mc_dev->mc_handle);
err_free_mcp:
fsl_mc_portal_free(mc_dev->mc_io);
err_exit:
return err;
}
static int dpaa2_ptp_remove(struct fsl_mc_device *mc_dev)
{
struct device *dev = &mc_dev->dev;
struct ptp_qoriq *ptp_qoriq;
ptp_qoriq = dev_get_drvdata(dev);
dpaa2_phc_index = -1;
ptp_qoriq_free(ptp_qoriq);
fsl_mc_free_irqs(mc_dev);
dprtc_close(mc_dev->mc_io, 0, mc_dev->mc_handle);
fsl_mc_portal_free(mc_dev->mc_io);
return 0;
}
static const struct fsl_mc_device_id dpaa2_ptp_match_id_table[] = {
{
.vendor = FSL_MC_VENDOR_FREESCALE,
.obj_type = "dprtc",
},
{}
};
MODULE_DEVICE_TABLE(fslmc, dpaa2_ptp_match_id_table);
static struct fsl_mc_driver dpaa2_ptp_drv = {
.driver = {
.name = KBUILD_MODNAME,
.owner = THIS_MODULE,
},
.probe = dpaa2_ptp_probe,
.remove = dpaa2_ptp_remove,
.match_id_table = dpaa2_ptp_match_id_table,
};
module_fsl_mc_driver(dpaa2_ptp_drv);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DPAA2 PTP Clock Driver");
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