aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/cxgb3/aq100x.c
blob: b1fd5bf836e41cd8c50b95dd7c4d5e8d47f2f4c3 (plain)
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
/*
 * Copyright (c) 2005-2008 Chelsio, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "common.h"
#include "regs.h"

enum {
	/* MDIO_DEV_PMA_PMD registers */
	AQ_LINK_STAT	= 0xe800,
	AQ_IMASK_PMA	= 0xf000,

	/* MDIO_DEV_XGXS registers */
	AQ_XAUI_RX_CFG	= 0xc400,
	AQ_XAUI_TX_CFG	= 0xe400,

	/* MDIO_DEV_ANEG registers */
	AQ_1G_CTRL	= 0xc400,
	AQ_ANEG_STAT	= 0xc800,

	/* MDIO_DEV_VEND1 registers */
	AQ_FW_VERSION	= 0x0020,
	AQ_IFLAG_GLOBAL	= 0xfc00,
	AQ_IMASK_GLOBAL	= 0xff00,
};

enum {
	IMASK_PMA	= 1 << 2,
	IMASK_GLOBAL	= 1 << 15,
	ADV_1G_FULL	= 1 << 15,
	ADV_1G_HALF	= 1 << 14,
	ADV_10G_FULL	= 1 << 12,
	AQ_RESET	= (1 << 14) | (1 << 15),
	AQ_LOWPOWER	= 1 << 12,
};

static int aq100x_reset(struct cphy *phy, int wait)
{
	/*
	 * Ignore the caller specified wait time; always wait for the reset to
	 * complete. Can take up to 3s.
	 */
	int err = t3_phy_reset(phy, MDIO_MMD_VEND1, 3000);

	if (err)
		CH_WARN(phy->adapter, "PHY%d: reset failed (0x%x).\n",
			phy->mdio.prtad, err);

	return err;
}

static int aq100x_intr_enable(struct cphy *phy)
{
	int err = t3_mdio_write(phy, MDIO_MMD_PMAPMD, AQ_IMASK_PMA, IMASK_PMA);
	if (err)
		return err;

	err = t3_mdio_write(phy, MDIO_MMD_VEND1, AQ_IMASK_GLOBAL, IMASK_GLOBAL);
	return err;
}

static int aq100x_intr_disable(struct cphy *phy)
{
	return t3_mdio_write(phy, MDIO_MMD_VEND1, AQ_IMASK_GLOBAL, 0);
}

static int aq100x_intr_clear(struct cphy *phy)
{
	unsigned int v;

	t3_mdio_read(phy, MDIO_MMD_VEND1, AQ_IFLAG_GLOBAL, &v);
	t3_mdio_read(phy, MDIO_MMD_PMAPMD, MDIO_STAT1, &v);

	return 0;
}

static int aq100x_intr_handler(struct cphy *phy)
{
	int err;
	unsigned int cause, v;

	err = t3_mdio_read(phy, MDIO_MMD_VEND1, AQ_IFLAG_GLOBAL, &cause);
	if (err)
		return err;

	/* Read (and reset) the latching version of the status */
	t3_mdio_read(phy, MDIO_MMD_PMAPMD, MDIO_STAT1, &v);

	return cphy_cause_link_change;
}

static int aq100x_power_down(struct cphy *phy, int off)
{
	return mdio_set_flag(&phy->mdio, phy->mdio.prtad,
			     MDIO_MMD_PMAPMD, MDIO_CTRL1,
			     MDIO_CTRL1_LPOWER, off);
}

static int aq100x_autoneg_enable(struct cphy *phy)
{
	int err;

	err = aq100x_power_down(phy, 0);
	if (!err)
		err = mdio_set_flag(&phy->mdio, phy->mdio.prtad,
				    MDIO_MMD_AN, MDIO_CTRL1,
				    BMCR_ANENABLE | BMCR_ANRESTART, 1);

	return err;
}

static int aq100x_autoneg_restart(struct cphy *phy)
{
	int err;

	err = aq100x_power_down(phy, 0);
	if (!err)
		err = mdio_set_flag(&phy->mdio, phy->mdio.prtad,
				    MDIO_MMD_AN, MDIO_CTRL1,
				    BMCR_ANENABLE | BMCR_ANRESTART, 1);

	return err;
}

static int aq100x_advertise(struct cphy *phy, unsigned int advertise_map)
{
	unsigned int adv;
	int err;

	/* 10G advertisement */
	adv = 0;
	if (advertise_map & ADVERTISED_10000baseT_Full)
		adv |= ADV_10G_FULL;
	err = t3_mdio_change_bits(phy, MDIO_MMD_AN, MDIO_AN_10GBT_CTRL,
				  ADV_10G_FULL, adv);
	if (err)
		return err;

	/* 1G advertisement */
	adv = 0;
	if (advertise_map & ADVERTISED_1000baseT_Full)
		adv |= ADV_1G_FULL;
	if (advertise_map & ADVERTISED_1000baseT_Half)
		adv |= ADV_1G_HALF;
	err = t3_mdio_change_bits(phy, MDIO_MMD_AN, AQ_1G_CTRL,
				  ADV_1G_FULL | ADV_1G_HALF, adv);
	if (err)
		return err;

	/* 100M, pause advertisement */
	adv = 0;
	if (advertise_map & ADVERTISED_100baseT_Half)
		adv |= ADVERTISE_100HALF;
	if (advertise_map & ADVERTISED_100baseT_Full)
		adv |= ADVERTISE_100FULL;
	if (advertise_map & ADVERTISED_Pause)
		adv |= ADVERTISE_PAUSE_CAP;
	if (advertise_map & ADVERTISED_Asym_Pause)
		adv |= ADVERTISE_PAUSE_ASYM;
	err = t3_mdio_change_bits(phy, MDIO_MMD_AN, MDIO_AN_ADVERTISE,
				  0xfe0, adv);

	return err;
}

static int aq100x_set_loopback(struct cphy *phy, int mmd, int dir, int enable)
{
	return mdio_set_flag(&phy->mdio, phy->mdio.prtad,
			     MDIO_MMD_PMAPMD, MDIO_CTRL1,
			     BMCR_LOOPBACK, enable);
}

static int aq100x_set_speed_duplex(struct cphy *phy, int speed, int duplex)
{
	/* no can do */
	return -1;
}

static int aq100x_get_link_status(struct cphy *phy, int *link_ok,
				  int *speed, int *duplex, int *fc)
{
	int err;
	unsigned int v;

	if (link_ok) {
		err = t3_mdio_read(phy, MDIO_MMD_PMAPMD, AQ_LINK_STAT, &v);
		if (err)
			return err;

		*link_ok = v & 1;
		if (!*link_ok)
			return 0;
	}

	err = t3_mdio_read(phy, MDIO_MMD_AN, AQ_ANEG_STAT, &v);
	if (err)
		return err;

	if (speed) {
		switch (v & 0x6) {
		case 0x6:
			*speed = SPEED_10000;
			break;
		case 0x4:
			*speed = SPEED_1000;
			break;
		case 0x2:
			*speed = SPEED_100;
			break;
		case 0x0:
			*speed = SPEED_10;
			break;
		}
	}

	if (duplex)
		*duplex = v & 1 ? DUPLEX_FULL : DUPLEX_HALF;

	return 0;
}

static struct cphy_ops aq100x_ops = {
	.reset             = aq100x_reset,
	.intr_enable       = aq100x_intr_enable,
	.intr_disable      = aq100x_intr_disable,
	.intr_clear        = aq100x_intr_clear,
	.intr_handler      = aq100x_intr_handler,
	.autoneg_enable    = aq100x_autoneg_enable,
	.autoneg_restart   = aq100x_autoneg_restart,
	.advertise         = aq100x_advertise,
	.set_loopback      = aq100x_set_loopback,
	.set_speed_duplex  = aq100x_set_speed_duplex,
	.get_link_status   = aq100x_get_link_status,
	.power_down        = aq100x_power_down,
	.mmds 		   = MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS | MDIO_DEVS_PHYXS,
};

int t3_aq100x_phy_prep(struct cphy *phy, struct adapter *adapter, int phy_addr,
		       const struct mdio_ops *mdio_ops)
{
	unsigned int v, v2, gpio, wait;
	int err;

	cphy_init(phy, adapter, phy_addr, &aq100x_ops, mdio_ops,
		  SUPPORTED_1000baseT_Full | SUPPORTED_10000baseT_Full |
		  SUPPORTED_Autoneg | SUPPORTED_AUI, "1000/10GBASE-T");

	/*
	 * The PHY has been out of reset ever since the system powered up.  So
	 * we do a hard reset over here.
	 */
	gpio = phy_addr ? F_GPIO10_OUT_VAL : F_GPIO6_OUT_VAL;
	t3_set_reg_field(adapter, A_T3DBG_GPIO_EN, gpio, 0);
	msleep(1);
	t3_set_reg_field(adapter, A_T3DBG_GPIO_EN, gpio, gpio);

	/*
	 * Give it enough time to load the firmware and get ready for mdio.
	 */
	msleep(1000);
	wait = 500; /* in 10ms increments */
	do {
		err = t3_mdio_read(phy, MDIO_MMD_VEND1, MDIO_CTRL1, &v);
		if (err || v == 0xffff) {

			/* Allow prep_adapter to succeed when ffff is read */

			CH_WARN(adapter, "PHY%d: reset failed (0x%x, 0x%x).\n",
				phy_addr, err, v);
			goto done;
		}

		v &= AQ_RESET;
		if (v)
			msleep(10);
	} while (v && --wait);
	if (v) {
		CH_WARN(adapter, "PHY%d: reset timed out (0x%x).\n",
			phy_addr, v);

		goto done; /* let prep_adapter succeed */
	}

	/* Datasheet says 3s max but this has been observed */
	wait = (500 - wait) * 10 + 1000;
	if (wait > 3000)
		CH_WARN(adapter, "PHY%d: reset took %ums\n", phy_addr, wait);

	/* Firmware version check. */
	t3_mdio_read(phy, MDIO_MMD_VEND1, AQ_FW_VERSION, &v);
	if (v != 30) {
		CH_WARN(adapter, "PHY%d: unsupported firmware %d\n",
			phy_addr, v);
		return 0; /* allow t3_prep_adapter to succeed */
	}

	/*
	 * The PHY should start in really-low-power mode.  Prepare it for normal
	 * operations.
	 */
	err = t3_mdio_read(phy, MDIO_MMD_VEND1, MDIO_CTRL1, &v);
	if (err)
		return err;
	if (v & AQ_LOWPOWER) {
		err = t3_mdio_change_bits(phy, MDIO_MMD_VEND1, MDIO_CTRL1,
					  AQ_LOWPOWER, 0);
		if (err)
			return err;
		msleep(10);
	} else
		CH_WARN(adapter, "PHY%d does not start in low power mode.\n",
			phy_addr);

	/*
	 * Verify XAUI settings, but let prep succeed no matter what.
	 */
	v = v2 = 0;
	t3_mdio_read(phy, MDIO_MMD_PHYXS, AQ_XAUI_RX_CFG, &v);
	t3_mdio_read(phy, MDIO_MMD_PHYXS, AQ_XAUI_TX_CFG, &v2);
	if (v != 0x1b || v2 != 0x1b)
		CH_WARN(adapter,
			"PHY%d: incorrect XAUI settings (0x%x, 0x%x).\n",
			phy_addr, v, v2);

done:
	return err;
}