1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-or-later
2/*
3 * Copyright 2008 - 2015 Freescale Semiconductor Inc.
4 */
5
6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8#include <linux/init.h>
9#include <linux/module.h>
10#include <linux/of_address.h>
11#include <linux/of_platform.h>
12#include <linux/of_net.h>
13#include <linux/of_mdio.h>
14#include <linux/device.h>
15#include <linux/phy.h>
16#include <linux/netdevice.h>
17#include <linux/phy_fixed.h>
18#include <linux/phylink.h>
19#include <linux/etherdevice.h>
20#include <linux/libfdt_env.h>
21#include <linux/platform_device.h>
22
23#include "mac.h"
24#include "fman_mac.h"
25#include "fman_dtsec.h"
26#include "fman_tgec.h"
27#include "fman_memac.h"
28
29MODULE_LICENSE("Dual BSD/GPL");
30MODULE_DESCRIPTION("FSL FMan MAC API based driver");
31
32struct mac_priv_s {
33	u8				cell_index;
34	struct fman			*fman;
35	/* List of multicast addresses */
36	struct list_head		mc_addr_list;
37	struct platform_device		*eth_dev;
38	u16				speed;
39};
40
41struct mac_address {
42	u8 addr[ETH_ALEN];
43	struct list_head list;
44};
45
46static void mac_exception(struct mac_device *mac_dev,
47			  enum fman_mac_exceptions ex)
48{
49	if (ex == FM_MAC_EX_10G_RX_FIFO_OVFL) {
50		/* don't flag RX FIFO after the first */
51		mac_dev->set_exception(mac_dev->fman_mac,
52				       FM_MAC_EX_10G_RX_FIFO_OVFL, false);
53		dev_err(mac_dev->dev, "10G MAC got RX FIFO Error = %x\n", ex);
54	}
55
56	dev_dbg(mac_dev->dev, "%s:%s() -> %d\n", KBUILD_BASENAME ".c",
57		__func__, ex);
58}
59
60int fman_set_multi(struct net_device *net_dev, struct mac_device *mac_dev)
61{
62	struct mac_priv_s	*priv;
63	struct mac_address	*old_addr, *tmp;
64	struct netdev_hw_addr	*ha;
65	int			err;
66	enet_addr_t		*addr;
67
68	priv = mac_dev->priv;
69
70	/* Clear previous address list */
71	list_for_each_entry_safe(old_addr, tmp, &priv->mc_addr_list, list) {
72		addr = (enet_addr_t *)old_addr->addr;
73		err = mac_dev->remove_hash_mac_addr(mac_dev->fman_mac, addr);
74		if (err < 0)
75			return err;
76
77		list_del(&old_addr->list);
78		kfree(old_addr);
79	}
80
81	/* Add all the addresses from the new list */
82	netdev_for_each_mc_addr(ha, net_dev) {
83		addr = (enet_addr_t *)ha->addr;
84		err = mac_dev->add_hash_mac_addr(mac_dev->fman_mac, addr);
85		if (err < 0)
86			return err;
87
88		tmp = kmalloc(sizeof(*tmp), GFP_ATOMIC);
89		if (!tmp)
90			return -ENOMEM;
91
92		ether_addr_copy(tmp->addr, ha->addr);
93		list_add(&tmp->list, &priv->mc_addr_list);
94	}
95	return 0;
96}
97
98static DEFINE_MUTEX(eth_lock);
99
100static struct platform_device *dpaa_eth_add_device(int fman_id,
101						   struct mac_device *mac_dev)
102{
103	struct platform_device *pdev;
104	struct dpaa_eth_data data;
105	struct mac_priv_s	*priv;
106	static int dpaa_eth_dev_cnt;
107	int ret;
108
109	priv = mac_dev->priv;
110
111	data.mac_dev = mac_dev;
112	data.mac_hw_id = priv->cell_index;
113	data.fman_hw_id = fman_id;
114
115	mutex_lock(&eth_lock);
116	pdev = platform_device_alloc("dpaa-ethernet", dpaa_eth_dev_cnt);
117	if (!pdev) {
118		ret = -ENOMEM;
119		goto no_mem;
120	}
121
122	pdev->dev.parent = mac_dev->dev;
123
124	ret = platform_device_add_data(pdev, &data, sizeof(data));
125	if (ret)
126		goto err;
127
128	ret = platform_device_add(pdev);
129	if (ret)
130		goto err;
131
132	dpaa_eth_dev_cnt++;
133	mutex_unlock(&eth_lock);
134
135	return pdev;
136
137err:
138	platform_device_put(pdev);
139no_mem:
140	mutex_unlock(&eth_lock);
141
142	return ERR_PTR(ret);
143}
144
145static const struct of_device_id mac_match[] = {
146	{ .compatible   = "fsl,fman-dtsec", .data = dtsec_initialization },
147	{ .compatible   = "fsl,fman-xgec", .data = tgec_initialization },
148	{ .compatible	= "fsl,fman-memac", .data = memac_initialization },
149	{}
150};
151MODULE_DEVICE_TABLE(of, mac_match);
152
153static int mac_probe(struct platform_device *_of_dev)
154{
155	int			 err, i, nph;
156	int (*init)(struct mac_device *mac_dev, struct device_node *mac_node,
157		    struct fman_mac_params *params);
158	struct device		*dev;
159	struct device_node	*mac_node, *dev_node;
160	struct mac_device	*mac_dev;
161	struct platform_device	*of_dev;
162	struct mac_priv_s	*priv;
163	struct fman_mac_params	 params;
164	u32			 val;
165	u8			fman_id;
166	phy_interface_t          phy_if;
167
168	dev = &_of_dev->dev;
169	mac_node = dev->of_node;
170	init = of_device_get_match_data(dev);
171
172	mac_dev = devm_kzalloc(dev, sizeof(*mac_dev), GFP_KERNEL);
173	if (!mac_dev)
174		return -ENOMEM;
175	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
176	if (!priv)
177		return -ENOMEM;
178	platform_set_drvdata(_of_dev, mac_dev);
179
180	/* Save private information */
181	mac_dev->priv = priv;
182	mac_dev->dev = dev;
183
184	INIT_LIST_HEAD(&priv->mc_addr_list);
185
186	/* Get the FM node */
187	dev_node = of_get_parent(mac_node);
188	if (!dev_node) {
189		dev_err(dev, "of_get_parent(%pOF) failed\n",
190			mac_node);
191		return -EINVAL;
192	}
193
194	of_dev = of_find_device_by_node(dev_node);
195	if (!of_dev) {
196		dev_err(dev, "of_find_device_by_node(%pOF) failed\n", dev_node);
197		err = -EINVAL;
198		goto _return_of_node_put;
199	}
200
201	/* Get the FMan cell-index */
202	err = of_property_read_u32(dev_node, "cell-index", &val);
203	if (err) {
204		dev_err(dev, "failed to read cell-index for %pOF\n", dev_node);
205		err = -EINVAL;
206		goto _return_of_node_put;
207	}
208	/* cell-index 0 => FMan id 1 */
209	fman_id = (u8)(val + 1);
210
211	priv->fman = fman_bind(&of_dev->dev);
212	if (!priv->fman) {
213		dev_err(dev, "fman_bind(%pOF) failed\n", dev_node);
214		err = -ENODEV;
215		goto _return_of_node_put;
216	}
217
218	of_node_put(dev_node);
219
220	/* Get the address of the memory mapped registers */
221	mac_dev->res = platform_get_mem_or_io(_of_dev, 0);
222	if (!mac_dev->res) {
223		dev_err(dev, "could not get registers\n");
224		return -EINVAL;
225	}
226
227	err = devm_request_resource(dev, fman_get_mem_region(priv->fman),
228				    mac_dev->res);
229	if (err) {
230		dev_err_probe(dev, err, "could not request resource\n");
231		return err;
232	}
233
234	mac_dev->vaddr = devm_ioremap(dev, mac_dev->res->start,
235				      resource_size(mac_dev->res));
236	if (!mac_dev->vaddr) {
237		dev_err(dev, "devm_ioremap() failed\n");
238		return -EIO;
239	}
240
241	if (!of_device_is_available(mac_node))
242		return -ENODEV;
243
244	/* Get the cell-index */
245	err = of_property_read_u32(mac_node, "cell-index", &val);
246	if (err) {
247		dev_err(dev, "failed to read cell-index for %pOF\n", mac_node);
248		return -EINVAL;
249	}
250	priv->cell_index = (u8)val;
251
252	/* Get the MAC address */
253	err = of_get_mac_address(mac_node, mac_dev->addr);
254	if (err)
255		dev_warn(dev, "of_get_mac_address(%pOF) failed\n", mac_node);
256
257	/* Get the port handles */
258	nph = of_count_phandle_with_args(mac_node, "fsl,fman-ports", NULL);
259	if (unlikely(nph < 0)) {
260		dev_err(dev, "of_count_phandle_with_args(%pOF, fsl,fman-ports) failed\n",
261			mac_node);
262		return nph;
263	}
264
265	if (nph != ARRAY_SIZE(mac_dev->port)) {
266		dev_err(dev, "Not supported number of fman-ports handles of mac node %pOF from device tree\n",
267			mac_node);
268		return -EINVAL;
269	}
270
271	for (i = 0; i < ARRAY_SIZE(mac_dev->port); i++) {
272		/* Find the port node */
273		dev_node = of_parse_phandle(mac_node, "fsl,fman-ports", i);
274		if (!dev_node) {
275			dev_err(dev, "of_parse_phandle(%pOF, fsl,fman-ports) failed\n",
276				mac_node);
277			return -EINVAL;
278		}
279
280		of_dev = of_find_device_by_node(dev_node);
281		if (!of_dev) {
282			dev_err(dev, "of_find_device_by_node(%pOF) failed\n",
283				dev_node);
284			err = -EINVAL;
285			goto _return_of_node_put;
286		}
287
288		mac_dev->port[i] = fman_port_bind(&of_dev->dev);
289		if (!mac_dev->port[i]) {
290			dev_err(dev, "dev_get_drvdata(%pOF) failed\n",
291				dev_node);
292			err = -EINVAL;
293			goto _return_of_node_put;
294		}
295		of_node_put(dev_node);
296	}
297
298	/* Get the PHY connection type */
299	err = of_get_phy_mode(mac_node, &phy_if);
300	if (err) {
301		dev_warn(dev,
302			 "of_get_phy_mode() for %pOF failed. Defaulting to SGMII\n",
303			 mac_node);
304		phy_if = PHY_INTERFACE_MODE_SGMII;
305	}
306	mac_dev->phy_if = phy_if;
307
308	params.mac_id		= priv->cell_index;
309	params.fm		= (void *)priv->fman;
310	params.exception_cb	= mac_exception;
311	params.event_cb		= mac_exception;
312
313	err = init(mac_dev, mac_node, &params);
314	if (err < 0)
315		return err;
316
317	if (!is_zero_ether_addr(mac_dev->addr))
318		dev_info(dev, "FMan MAC address: %pM\n", mac_dev->addr);
319
320	priv->eth_dev = dpaa_eth_add_device(fman_id, mac_dev);
321	if (IS_ERR(priv->eth_dev)) {
322		err = PTR_ERR(priv->eth_dev);
323		dev_err(dev, "failed to add Ethernet platform device for MAC %d\n",
324			priv->cell_index);
325		priv->eth_dev = NULL;
326	}
327
328	return err;
329
330_return_of_node_put:
331	of_node_put(dev_node);
332	return err;
333}
334
335static void mac_remove(struct platform_device *pdev)
336{
337	struct mac_device *mac_dev = platform_get_drvdata(pdev);
338
339	platform_device_unregister(mac_dev->priv->eth_dev);
340}
341
342static struct platform_driver mac_driver = {
343	.driver = {
344		.name		= KBUILD_MODNAME,
345		.of_match_table	= mac_match,
346	},
347	.probe		= mac_probe,
348	.remove_new	= mac_remove,
349};
350
351builtin_platform_driver(mac_driver);
352