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