summaryrefslogtreecommitdiff
path: root/drivers/net/smc911x.c
blob: a677fd487adde9e2165b145ae2477247506ea353 (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
/*
 * SMSC LAN9[12]1[567] Network driver
 *
 * (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 <common.h>
#include <command.h>
#include <malloc.h>
#include <net.h>
#include <miiphy.h>

#include "smc911x.h"

u32 pkt_data_pull(struct eth_device *dev, u32 addr) \
	__attribute__ ((weak, alias ("smc911x_reg_read")));
void pkt_data_push(struct eth_device *dev, u32 addr, u32 val) \
	__attribute__ ((weak, alias ("smc911x_reg_write")));

#define mdelay(n)       udelay((n)*1000)

static void smc911x_handle_mac_address(struct eth_device *dev)
{
	unsigned long addrh, addrl;
	uchar *m = dev->enetaddr;

	addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
	addrh = m[4] | (m[5] << 8);
	smc911x_set_mac_csr(dev, ADDRL, addrl);
	smc911x_set_mac_csr(dev, ADDRH, addrh);

	printf(DRIVERNAME ": MAC %pM\n", m);
}

static int smc911x_eth_phy_read(struct eth_device *dev,
				u8 phy, u8 reg, u16 *val)
{
	while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
		;

	smc911x_set_mac_csr(dev, MII_ACC, phy << 11 | reg << 6 |
				MII_ACC_MII_BUSY);

	while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
		;

	*val = smc911x_get_mac_csr(dev, MII_DATA);

	return 0;
}

static int smc911x_eth_phy_write(struct eth_device *dev,
				u8 phy, u8 reg, u16  val)
{
	while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
		;

	smc911x_set_mac_csr(dev, MII_DATA, val);
	smc911x_set_mac_csr(dev, MII_ACC,
		phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);

	while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
		;
	return 0;
}

static int smc911x_phy_reset(struct eth_device *dev)
{
	u32 reg;

	reg = smc911x_reg_read(dev, PMT_CTRL);
	reg &= ~0xfffff030;
	reg |= PMT_CTRL_PHY_RST;
	smc911x_reg_write(dev, PMT_CTRL, reg);

	mdelay(100);

	return 0;
}

static void smc911x_phy_configure(struct eth_device *dev)
{
	int timeout;
	u16 status;

	smc911x_phy_reset(dev);

	smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_RESET);
	mdelay(1);
	smc911x_eth_phy_write(dev, 1, MII_ADVERTISE, 0x01e1);
	smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_ANENABLE |
				BMCR_ANRESTART);

	timeout = 5000;
	do {
		mdelay(1);
		if ((timeout--) == 0)
			goto err_out;

		if (smc911x_eth_phy_read(dev, 1, MII_BMSR, &status) != 0)
			goto err_out;
	} while (!(status & BMSR_LSTATUS));

	printf(DRIVERNAME ": phy initialized\n");

	return;

err_out:
	printf(DRIVERNAME ": autonegotiation timed out\n");
}

static void smc911x_enable(struct eth_device *dev)
{
	/* Enable TX */
	smc911x_reg_write(dev, HW_CFG, 8 << 16 | HW_CFG_SF);

	smc911x_reg_write(dev, GPT_CFG, GPT_CFG_TIMER_EN | 10000);

	smc911x_reg_write(dev, TX_CFG, TX_CFG_TX_ON);

	/* no padding to start of packets */
	smc911x_reg_write(dev, RX_CFG, 0);

	smc911x_set_mac_csr(dev, MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN |
				MAC_CR_HBDIS);

}

static int smc911x_init(struct eth_device *dev, bd_t * bd)
{
	struct chip_id *id = dev->priv;

	printf(DRIVERNAME ": detected %s controller\n", id->name);

	smc911x_reset(dev);

	/* Configure the PHY, initialize the link state */
	smc911x_phy_configure(dev);

	smc911x_handle_mac_address(dev);

	/* Turn on Tx + Rx */
	smc911x_enable(dev);

	return 0;
}

static int smc911x_send(struct eth_device *dev,
			volatile void *packet, int length)
{
	u32 *data = (u32*)packet;
	u32 tmplen;
	u32 status;

	smc911x_reg_write(dev, TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG |
				TX_CMD_A_INT_LAST_SEG | length);
	smc911x_reg_write(dev, TX_DATA_FIFO, length);

	tmplen = (length + 3) / 4;

	while (tmplen--)
		pkt_data_push(dev, TX_DATA_FIFO, *data++);

	/* wait for transmission */
	while (!((smc911x_reg_read(dev, TX_FIFO_INF) &
					TX_FIFO_INF_TSUSED) >> 16));

	/* get status. Ignore 'no carrier' error, it has no meaning for
	 * full duplex operation
	 */
	status = smc911x_reg_read(dev, TX_STATUS_FIFO) &
			(TX_STS_LOC | TX_STS_LATE_COLL | TX_STS_MANY_COLL |
			TX_STS_MANY_DEFER | TX_STS_UNDERRUN);

	if (!status)
		return 0;

	printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
		status & TX_STS_LOC ? "TX_STS_LOC " : "",
		status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
		status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
		status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
		status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");

	return -1;
}

static void smc911x_halt(struct eth_device *dev)
{
	smc911x_reset(dev);
}

static int smc911x_rx(struct eth_device *dev)
{
	u32 *data = (u32 *)NetRxPackets[0];
	u32 pktlen, tmplen;
	u32 status;

	if ((smc911x_reg_read(dev, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
		status = smc911x_reg_read(dev, RX_STATUS_FIFO);
		pktlen = (status & RX_STS_PKT_LEN) >> 16;

		smc911x_reg_write(dev, RX_CFG, 0);

		tmplen = (pktlen + 3) / 4;
		while (tmplen--)
			*data++ = pkt_data_pull(dev, RX_DATA_FIFO);

		if (status & RX_STS_ES)
			printf(DRIVERNAME
				": dropped bad packet. Status: 0x%08x\n",
				status);
		else
			NetReceive(NetRxPackets[0], pktlen);
	}

	return 0;
}

#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
/* wrapper for smc911x_eth_phy_read */
static int smc911x_miiphy_read(const char *devname, u8 phy, u8 reg, u16 *val)
{
	struct eth_device *dev = eth_get_dev_by_name(devname);
	if (dev)
		return smc911x_eth_phy_read(dev, phy, reg, val);
	return -1;
}
/* wrapper for smc911x_eth_phy_write */
static int smc911x_miiphy_write(const char *devname, u8 phy, u8 reg, u16 val)
{
	struct eth_device *dev = eth_get_dev_by_name(devname);
	if (dev)
		return smc911x_eth_phy_write(dev, phy, reg, val);
	return -1;
}
#endif

int smc911x_initialize(u8 dev_num, int base_addr)
{
	unsigned long addrl, addrh;
	struct eth_device *dev;

	dev = malloc(sizeof(*dev));
	if (!dev) {
		return -1;
	}
	memset(dev, 0, sizeof(*dev));

	dev->iobase = base_addr;

	/* Try to detect chip. Will fail if not present. */
	if (smc911x_detect_chip(dev)) {
		free(dev);
		return 0;
	}

	addrh = smc911x_get_mac_csr(dev, ADDRH);
	addrl = smc911x_get_mac_csr(dev, ADDRL);
	if (!(addrl == 0xffffffff && addrh == 0x0000ffff)) {
		/* address is obtained from optional eeprom */
		dev->enetaddr[0] = addrl;
		dev->enetaddr[1] = addrl >>  8;
		dev->enetaddr[2] = addrl >> 16;
		dev->enetaddr[3] = addrl >> 24;
		dev->enetaddr[4] = addrh;
		dev->enetaddr[5] = addrh >> 8;
	}

	dev->init = smc911x_init;
	dev->halt = smc911x_halt;
	dev->send = smc911x_send;
	dev->recv = smc911x_rx;
	sprintf(dev->name, "%s-%hu", DRIVERNAME, dev_num);

	eth_register(dev);

#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
	miiphy_register(dev->name, smc911x_miiphy_read, smc911x_miiphy_write);
#endif

	return 1;
}