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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-or-later
/*
* Copyright 2008 - 2015 Freescale Semiconductor Inc.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/of_net.h>
#include <linux/of_mdio.h>
#include <linux/device.h>
#include <linux/phy.h>
#include <linux/netdevice.h>
#include <linux/phy_fixed.h>
#include <linux/phylink.h>
#include <linux/etherdevice.h>
#include <linux/libfdt_env.h>
#include <linux/platform_device.h>
#include "mac.h"
#include "fman_mac.h"
#include "fman_dtsec.h"
#include "fman_tgec.h"
#include "fman_memac.h"
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("FSL FMan MAC API based driver");
struct mac_priv_s {
u8 cell_index;
struct fman *fman;
/* List of multicast addresses */
struct list_head mc_addr_list;
struct platform_device *eth_dev;
u16 speed;
};
struct mac_address {
u8 addr[ETH_ALEN];
struct list_head list;
};
static void mac_exception(struct mac_device *mac_dev,
enum fman_mac_exceptions ex)
{
if (ex == FM_MAC_EX_10G_RX_FIFO_OVFL) {
/* don't flag RX FIFO after the first */
mac_dev->set_exception(mac_dev->fman_mac,
FM_MAC_EX_10G_RX_FIFO_OVFL, false);
dev_err(mac_dev->dev, "10G MAC got RX FIFO Error = %x\n", ex);
}
dev_dbg(mac_dev->dev, "%s:%s() -> %d\n", KBUILD_BASENAME ".c",
__func__, ex);
}
int fman_set_multi(struct net_device *net_dev, struct mac_device *mac_dev)
{
struct mac_priv_s *priv;
struct mac_address *old_addr, *tmp;
struct netdev_hw_addr *ha;
int err;
enet_addr_t *addr;
priv = mac_dev->priv;
/* Clear previous address list */
list_for_each_entry_safe(old_addr, tmp, &priv->mc_addr_list, list) {
addr = (enet_addr_t *)old_addr->addr;
err = mac_dev->remove_hash_mac_addr(mac_dev->fman_mac, addr);
if (err < 0)
return err;
list_del(&old_addr->list);
kfree(old_addr);
}
/* Add all the addresses from the new list */
netdev_for_each_mc_addr(ha, net_dev) {
addr = (enet_addr_t *)ha->addr;
err = mac_dev->add_hash_mac_addr(mac_dev->fman_mac, addr);
if (err < 0)
return err;
tmp = kmalloc(sizeof(*tmp), GFP_ATOMIC);
if (!tmp)
return -ENOMEM;
ether_addr_copy(tmp->addr, ha->addr);
list_add(&tmp->list, &priv->mc_addr_list);
}
return 0;
}
static DEFINE_MUTEX(eth_lock);
static struct platform_device *dpaa_eth_add_device(int fman_id,
struct mac_device *mac_dev)
{
struct platform_device *pdev;
struct dpaa_eth_data data;
struct mac_priv_s *priv;
static int dpaa_eth_dev_cnt;
int ret;
priv = mac_dev->priv;
data.mac_dev = mac_dev;
data.mac_hw_id = priv->cell_index;
data.fman_hw_id = fman_id;
mutex_lock(ð_lock);
pdev = platform_device_alloc("dpaa-ethernet", dpaa_eth_dev_cnt);
if (!pdev) {
ret = -ENOMEM;
goto no_mem;
}
pdev->dev.parent = mac_dev->dev;
ret = platform_device_add_data(pdev, &data, sizeof(data));
if (ret)
goto err;
ret = platform_device_add(pdev);
if (ret)
goto err;
dpaa_eth_dev_cnt++;
mutex_unlock(ð_lock);
return pdev;
err:
platform_device_put(pdev);
no_mem:
mutex_unlock(ð_lock);
return ERR_PTR(ret);
}
static const struct of_device_id mac_match[] = {
{ .compatible = "fsl,fman-dtsec", .data = dtsec_initialization },
{ .compatible = "fsl,fman-xgec", .data = tgec_initialization },
{ .compatible = "fsl,fman-memac", .data = memac_initialization },
{}
};
MODULE_DEVICE_TABLE(of, mac_match);
static int mac_probe(struct platform_device *_of_dev)
{
int err, i, nph;
int (*init)(struct mac_device *mac_dev, struct device_node *mac_node,
struct fman_mac_params *params);
struct device *dev;
struct device_node *mac_node, *dev_node;
struct mac_device *mac_dev;
struct platform_device *of_dev;
struct mac_priv_s *priv;
struct fman_mac_params params;
u32 val;
u8 fman_id;
phy_interface_t phy_if;
dev = &_of_dev->dev;
mac_node = dev->of_node;
init = of_device_get_match_data(dev);
mac_dev = devm_kzalloc(dev, sizeof(*mac_dev), GFP_KERNEL);
if (!mac_dev)
return -ENOMEM;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
platform_set_drvdata(_of_dev, mac_dev);
/* Save private information */
mac_dev->priv = priv;
mac_dev->dev = dev;
INIT_LIST_HEAD(&priv->mc_addr_list);
/* Get the FM node */
dev_node = of_get_parent(mac_node);
if (!dev_node) {
dev_err(dev, "of_get_parent(%pOF) failed\n",
mac_node);
return -EINVAL;
}
of_dev = of_find_device_by_node(dev_node);
if (!of_dev) {
dev_err(dev, "of_find_device_by_node(%pOF) failed\n", dev_node);
err = -EINVAL;
goto _return_of_node_put;
}
mac_dev->fman_dev = &of_dev->dev;
/* Get the FMan cell-index */
err = of_property_read_u32(dev_node, "cell-index", &val);
if (err) {
dev_err(dev, "failed to read cell-index for %pOF\n", dev_node);
err = -EINVAL;
goto _return_dev_put;
}
/* cell-index 0 => FMan id 1 */
fman_id = (u8)(val + 1);
priv->fman = fman_bind(mac_dev->fman_dev);
if (!priv->fman) {
dev_err(dev, "fman_bind(%pOF) failed\n", dev_node);
err = -ENODEV;
goto _return_dev_put;
}
/* Two references have been taken in of_find_device_by_node()
* and fman_bind(). Release one of them here. The second one
* will be released in mac_remove().
*/
put_device(mac_dev->fman_dev);
of_node_put(dev_node);
dev_node = NULL;
/* Get the address of the memory mapped registers */
mac_dev->res = platform_get_mem_or_io(_of_dev, 0);
if (!mac_dev->res) {
dev_err(dev, "could not get registers\n");
err = -EINVAL;
goto _return_dev_put;
}
err = devm_request_resource(dev, fman_get_mem_region(priv->fman),
mac_dev->res);
if (err) {
dev_err_probe(dev, err, "could not request resource\n");
goto _return_dev_put;
}
mac_dev->vaddr = devm_ioremap(dev, mac_dev->res->start,
resource_size(mac_dev->res));
if (!mac_dev->vaddr) {
dev_err(dev, "devm_ioremap() failed\n");
err = -EIO;
goto _return_dev_put;
}
if (!of_device_is_available(mac_node)) {
err = -ENODEV;
goto _return_dev_put;
}
/* Get the cell-index */
err = of_property_read_u32(mac_node, "cell-index", &val);
if (err) {
dev_err(dev, "failed to read cell-index for %pOF\n", mac_node);
err = -EINVAL;
goto _return_dev_put;
}
priv->cell_index = (u8)val;
/* Get the MAC address */
err = of_get_mac_address(mac_node, mac_dev->addr);
if (err)
dev_warn(dev, "of_get_mac_address(%pOF) failed\n", mac_node);
/* Get the port handles */
nph = of_count_phandle_with_args(mac_node, "fsl,fman-ports", NULL);
if (unlikely(nph < 0)) {
dev_err(dev, "of_count_phandle_with_args(%pOF, fsl,fman-ports) failed\n",
mac_node);
err = nph;
goto _return_dev_put;
}
if (nph != ARRAY_SIZE(mac_dev->port)) {
dev_err(dev, "Not supported number of fman-ports handles of mac node %pOF from device tree\n",
mac_node);
err = -EINVAL;
goto _return_dev_put;
}
/* PORT_NUM determines the size of the port array */
for (i = 0; i < PORT_NUM; i++) {
/* Find the port node */
dev_node = of_parse_phandle(mac_node, "fsl,fman-ports", i);
if (!dev_node) {
dev_err(dev, "of_parse_phandle(%pOF, fsl,fman-ports) failed\n",
mac_node);
err = -EINVAL;
goto _return_dev_arr_put;
}
of_dev = of_find_device_by_node(dev_node);
if (!of_dev) {
dev_err(dev, "of_find_device_by_node(%pOF) failed\n",
dev_node);
err = -EINVAL;
goto _return_dev_arr_put;
}
mac_dev->fman_port_devs[i] = &of_dev->dev;
mac_dev->port[i] = fman_port_bind(mac_dev->fman_port_devs[i]);
if (!mac_dev->port[i]) {
dev_err(dev, "dev_get_drvdata(%pOF) failed\n",
dev_node);
err = -EINVAL;
goto _return_dev_arr_put;
}
/* Two references have been taken in of_find_device_by_node()
* and fman_port_bind(). Release one of them here. The second
* one will be released in mac_remove().
*/
put_device(mac_dev->fman_port_devs[i]);
of_node_put(dev_node);
dev_node = NULL;
}
/* Get the PHY connection type */
err = of_get_phy_mode(mac_node, &phy_if);
if (err) {
dev_warn(dev,
"of_get_phy_mode() for %pOF failed. Defaulting to SGMII\n",
mac_node);
phy_if = PHY_INTERFACE_MODE_SGMII;
}
mac_dev->phy_if = phy_if;
params.mac_id = priv->cell_index;
params.fm = (void *)priv->fman;
params.exception_cb = mac_exception;
params.event_cb = mac_exception;
err = init(mac_dev, mac_node, ¶ms);
if (err < 0)
goto _return_dev_arr_put;
if (!is_zero_ether_addr(mac_dev->addr))
dev_info(dev, "FMan MAC address: %pM\n", mac_dev->addr);
priv->eth_dev = dpaa_eth_add_device(fman_id, mac_dev);
if (IS_ERR(priv->eth_dev)) {
err = PTR_ERR(priv->eth_dev);
dev_err(dev, "failed to add Ethernet platform device for MAC %d\n",
priv->cell_index);
priv->eth_dev = NULL;
}
return err;
_return_dev_arr_put:
/* mac_dev is kzalloc'ed */
for (i = 0; i < PORT_NUM; i++)
put_device(mac_dev->fman_port_devs[i]);
_return_dev_put:
put_device(mac_dev->fman_dev);
_return_of_node_put:
of_node_put(dev_node);
return err;
}
static void mac_remove(struct platform_device *pdev)
{
struct mac_device *mac_dev = platform_get_drvdata(pdev);
int i;
for (i = 0; i < PORT_NUM; i++)
put_device(mac_dev->fman_port_devs[i]);
put_device(mac_dev->fman_dev);
platform_device_unregister(mac_dev->priv->eth_dev);
}
static struct platform_driver mac_driver = {
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = mac_match,
},
.probe = mac_probe,
.remove_new = mac_remove,
};
builtin_platform_driver(mac_driver);
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