aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/usb/ax88172a.c
blob: d012203b0f298dd1e1fc1a69192cda3d0c82c523 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
/*
 * ASIX AX88172A based USB 2.0 Ethernet Devices
 * Copyright (C) 2012 OMICRON electronics GmbH
 *
 * Supports external PHYs via phylib. Based on the driver for the
 * AX88772. Original copyrights follow:
 *
 * Copyright (C) 2003-2006 David Hollis <dhollis@davehollis.com>
 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
 * Copyright (C) 2006 James Painter <jamie.painter@iname.com>
 * Copyright (c) 2002-2003 TiVo Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "asix.h"
#include <linux/phy.h>

struct ax88172a_private {
	struct mii_bus *mdio;
	struct phy_device *phydev;
	char phy_name[20];
	u16 phy_addr;
	u16 oldmode;
	int use_embdphy;
	struct asix_rx_fixup_info rx_fixup_info;
};

/* MDIO read and write wrappers for phylib */
static int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum)
{
	return asix_mdio_read(((struct usbnet *)bus->priv)->net, phy_id,
			      regnum);
}

static int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum,
			       u16 val)
{
	asix_mdio_write(((struct usbnet *)bus->priv)->net, phy_id, regnum, val);
	return 0;
}

static int ax88172a_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
{
	if (!netif_running(net))
		return -EINVAL;

	if (!net->phydev)
		return -ENODEV;

	return phy_mii_ioctl(net->phydev, rq, cmd);
}

/* set MAC link settings according to information from phylib */
static void ax88172a_adjust_link(struct net_device *netdev)
{
	struct phy_device *phydev = netdev->phydev;
	struct usbnet *dev = netdev_priv(netdev);
	struct ax88172a_private *priv = dev->driver_priv;
	u16 mode = 0;

	if (phydev->link) {
		mode = AX88772_MEDIUM_DEFAULT;

		if (phydev->duplex == DUPLEX_HALF)
			mode &= ~AX_MEDIUM_FD;

		if (phydev->speed != SPEED_100)
			mode &= ~AX_MEDIUM_PS;
	}

	if (mode != priv->oldmode) {
		asix_write_medium_mode(dev, mode);
		priv->oldmode = mode;
		netdev_dbg(netdev, "speed %u duplex %d, setting mode to 0x%04x\n",
			   phydev->speed, phydev->duplex, mode);
		phy_print_status(phydev);
	}
}

static void ax88172a_status(struct usbnet *dev, struct urb *urb)
{
	/* link changes are detected by polling the phy */
}

/* use phylib infrastructure */
static int ax88172a_init_mdio(struct usbnet *dev)
{
	struct ax88172a_private *priv = dev->driver_priv;
	int ret, i;

	priv->mdio = mdiobus_alloc();
	if (!priv->mdio) {
		netdev_err(dev->net, "Could not allocate MDIO bus\n");
		return -ENOMEM;
	}

	priv->mdio->priv = (void *)dev;
	priv->mdio->read = &asix_mdio_bus_read;
	priv->mdio->write = &asix_mdio_bus_write;
	priv->mdio->name = "Asix MDIO Bus";
	/* mii bus name is usb-<usb bus number>-<usb device number> */
	snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "usb-%03d:%03d",
		 dev->udev->bus->busnum, dev->udev->devnum);

	priv->mdio->irq = kzalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
	if (!priv->mdio->irq) {
		ret = -ENOMEM;
		goto mfree;
	}
	for (i = 0; i < PHY_MAX_ADDR; i++)
		priv->mdio->irq[i] = PHY_POLL;

	ret = mdiobus_register(priv->mdio);
	if (ret) {
		netdev_err(dev->net, "Could not register MDIO bus\n");
		goto ifree;
	}

	netdev_info(dev->net, "registered mdio bus %s\n", priv->mdio->id);
	return 0;

ifree:
	kfree(priv->mdio->irq);
mfree:
	mdiobus_free(priv->mdio);
	return ret;
}

static void ax88172a_remove_mdio(struct usbnet *dev)
{
	struct ax88172a_private *priv = dev->driver_priv;

	netdev_info(dev->net, "deregistering mdio bus %s\n", priv->mdio->id);
	mdiobus_unregister(priv->mdio);
	kfree(priv->mdio->irq);
	mdiobus_free(priv->mdio);
}

static const struct net_device_ops ax88172a_netdev_ops = {
	.ndo_open		= usbnet_open,
	.ndo_stop		= usbnet_stop,
	.ndo_start_xmit		= usbnet_start_xmit,
	.ndo_tx_timeout		= usbnet_tx_timeout,
	.ndo_change_mtu		= usbnet_change_mtu,
	.ndo_set_mac_address	= asix_set_mac_address,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_do_ioctl		= ax88172a_ioctl,
	.ndo_set_rx_mode        = asix_set_multicast,
};

int ax88172a_get_settings(struct net_device *net, struct ethtool_cmd *cmd)
{
	if (!net->phydev)
		return -ENODEV;

	return phy_ethtool_gset(net->phydev, cmd);
}

int ax88172a_set_settings(struct net_device *net, struct ethtool_cmd *cmd)
{
	if (!net->phydev)
		return -ENODEV;

	return phy_ethtool_sset(net->phydev, cmd);
}

int ax88172a_nway_reset(struct net_device *net)
{
	if (!net->phydev)
		return -ENODEV;

	return phy_start_aneg(net->phydev);
}

static const struct ethtool_ops ax88172a_ethtool_ops = {
	.get_drvinfo		= asix_get_drvinfo,
	.get_link		= usbnet_get_link,
	.get_msglevel		= usbnet_get_msglevel,
	.set_msglevel		= usbnet_set_msglevel,
	.get_wol		= asix_get_wol,
	.set_wol		= asix_set_wol,
	.get_eeprom_len		= asix_get_eeprom_len,
	.get_eeprom		= asix_get_eeprom,
	.set_eeprom		= asix_set_eeprom,
	.get_settings		= ax88172a_get_settings,
	.set_settings		= ax88172a_set_settings,
	.nway_reset		= ax88172a_nway_reset,
};

static int ax88172a_reset_phy(struct usbnet *dev, int embd_phy)
{
	int ret;

	ret = asix_sw_reset(dev, AX_SWRESET_IPPD);
	if (ret < 0)
		goto err;

	msleep(150);
	ret = asix_sw_reset(dev, AX_SWRESET_CLEAR);
	if (ret < 0)
		goto err;

	msleep(150);

	ret = asix_sw_reset(dev, embd_phy ? AX_SWRESET_IPRL : AX_SWRESET_IPPD);
	if (ret < 0)
		goto err;

	return 0;

err:
	return ret;
}


static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf)
{
	int ret;
	u8 buf[ETH_ALEN];
	struct ax88172a_private *priv;

	usbnet_get_endpoints(dev, intf);

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	dev->driver_priv = priv;

	/* Get the MAC address */
	ret = asix_read_cmd(dev, AX_CMD_READ_NODE_ID, 0, 0, ETH_ALEN, buf);
	if (ret < 0) {
		netdev_err(dev->net, "Failed to read MAC address: %d\n", ret);
		goto free;
	}
	memcpy(dev->net->dev_addr, buf, ETH_ALEN);

	dev->net->netdev_ops = &ax88172a_netdev_ops;
	dev->net->ethtool_ops = &ax88172a_ethtool_ops;

	/* are we using the internal or the external phy? */
	ret = asix_read_cmd(dev, AX_CMD_SW_PHY_STATUS, 0, 0, 1, buf);
	if (ret < 0) {
		netdev_err(dev->net, "Failed to read software interface selection register: %d\n",
			   ret);
		goto free;
	}

	netdev_dbg(dev->net, "AX_CMD_SW_PHY_STATUS = 0x%02x\n", buf[0]);
	switch (buf[0] & AX_PHY_SELECT_MASK) {
	case AX_PHY_SELECT_INTERNAL:
		netdev_dbg(dev->net, "use internal phy\n");
		priv->use_embdphy = 1;
		break;
	case AX_PHY_SELECT_EXTERNAL:
		netdev_dbg(dev->net, "use external phy\n");
		priv->use_embdphy = 0;
		break;
	default:
		netdev_err(dev->net, "Interface mode not supported by driver\n");
		ret = -ENOTSUPP;
		goto free;
	}

	priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy);
	ax88172a_reset_phy(dev, priv->use_embdphy);

	/* Asix framing packs multiple eth frames into a 2K usb bulk transfer */
	if (dev->driver_info->flags & FLAG_FRAMING_AX) {
		/* hard_mtu  is still the default - the device does not support
		   jumbo eth frames */
		dev->rx_urb_size = 2048;
	}

	/* init MDIO bus */
	ret = ax88172a_init_mdio(dev);
	if (ret)
		goto free;

	return 0;

free:
	kfree(priv);
	return ret;
}

static int ax88172a_stop(struct usbnet *dev)
{
	struct ax88172a_private *priv = dev->driver_priv;

	netdev_dbg(dev->net, "Stopping interface\n");

	if (priv->phydev) {
		netdev_info(dev->net, "Disconnecting from phy %s\n",
			    priv->phy_name);
		phy_stop(priv->phydev);
		phy_disconnect(priv->phydev);
	}

	return 0;
}

static void ax88172a_unbind(struct usbnet *dev, struct usb_interface *intf)
{
	struct ax88172a_private *priv = dev->driver_priv;

	ax88172a_remove_mdio(dev);
	kfree(priv);
}

static int ax88172a_reset(struct usbnet *dev)
{
	struct asix_data *data = (struct asix_data *)&dev->data;
	struct ax88172a_private *priv = dev->driver_priv;
	int ret;
	u16 rx_ctl;

	ax88172a_reset_phy(dev, priv->use_embdphy);

	msleep(150);
	rx_ctl = asix_read_rx_ctl(dev);
	netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
	ret = asix_write_rx_ctl(dev, 0x0000);
	if (ret < 0)
		goto out;

	rx_ctl = asix_read_rx_ctl(dev);
	netdev_dbg(dev->net, "RX_CTL is 0x%04x setting to 0x0000\n", rx_ctl);

	msleep(150);

	ret = asix_write_cmd(dev, AX_CMD_WRITE_IPG0,
			     AX88772_IPG0_DEFAULT | AX88772_IPG1_DEFAULT,
			     AX88772_IPG2_DEFAULT, 0, NULL);
	if (ret < 0) {
		netdev_err(dev->net, "Write IPG,IPG1,IPG2 failed: %d\n", ret);
		goto out;
	}

	/* Rewrite MAC address */
	memcpy(data->mac_addr, dev->net->dev_addr, ETH_ALEN);
	ret = asix_write_cmd(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
			     data->mac_addr);
	if (ret < 0)
		goto out;

	/* Set RX_CTL to default values with 2k buffer, and enable cactus */
	ret = asix_write_rx_ctl(dev, AX_DEFAULT_RX_CTL);
	if (ret < 0)
		goto out;

	rx_ctl = asix_read_rx_ctl(dev);
	netdev_dbg(dev->net, "RX_CTL is 0x%04x after all initializations\n",
		   rx_ctl);

	rx_ctl = asix_read_medium_status(dev);
	netdev_dbg(dev->net, "Medium Status is 0x%04x after all initializations\n",
		   rx_ctl);

	/* Connect to PHY */
	snprintf(priv->phy_name, 20, PHY_ID_FMT,
		 priv->mdio->id, priv->phy_addr);

	priv->phydev = phy_connect(dev->net, priv->phy_name,
				   &ax88172a_adjust_link,
				   PHY_INTERFACE_MODE_MII);
	if (IS_ERR(priv->phydev)) {
		netdev_err(dev->net, "Could not connect to PHY device %s\n",
			   priv->phy_name);
		ret = PTR_ERR(priv->phydev);
		goto out;
	}

	netdev_info(dev->net, "Connected to phy %s\n", priv->phy_name);

	/* During power-up, the AX88172A set the power down (BMCR_PDOWN)
	 * bit of the PHY. Bring the PHY up again.
	 */
	genphy_resume(priv->phydev);
	phy_start(priv->phydev);

	return 0;

out:
	return ret;

}

static int ax88172a_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
	struct ax88172a_private *dp = dev->driver_priv;
	struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;

	return asix_rx_fixup_internal(dev, skb, rx);
}

const struct driver_info ax88172a_info = {
	.description = "ASIX AX88172A USB 2.0 Ethernet",
	.bind = ax88172a_bind,
	.reset = ax88172a_reset,
	.stop = ax88172a_stop,
	.unbind = ax88172a_unbind,
	.status = ax88172a_status,
	.flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_LINK_INTR |
		 FLAG_MULTI_PACKET,
	.rx_fixup = ax88172a_rx_fixup,
	.tx_fixup = asix_tx_fixup,
};