aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/bcm-sf2-eth.c
blob: 1524f5c99890e02fd48974317e57092715ba84a5 (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
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2014 Broadcom Corporation.
 */

#include <common.h>
#include <log.h>
#include <malloc.h>
#include <net.h>
#include <config.h>
#include <linux/delay.h>
#include <linux/printk.h>

#include <phy.h>
#include <miiphy.h>

#include <asm/io.h>

#include <netdev.h>
#include "bcm-sf2-eth.h"

#if defined(CONFIG_BCM_SF2_ETH_GMAC)
#include "bcm-sf2-eth-gmac.h"
#else
#error "bcm_sf2_eth: NEED to define a MAC!"
#endif

#define BCM_NET_MODULE_DESCRIPTION	"Broadcom Starfighter2 Ethernet driver"
#define BCM_NET_MODULE_VERSION		"0.1"
#define BCM_SF2_ETH_DEV_NAME		"bcm_sf2"

static const char banner[] =
	BCM_NET_MODULE_DESCRIPTION " " BCM_NET_MODULE_VERSION "\n";

static int bcm_sf2_eth_init(struct eth_device *dev)
{
	struct eth_info *eth = (struct eth_info *)(dev->priv);
	struct eth_dma *dma = &(eth->dma);
	struct phy_device *phydev;
	int rc = 0;
	int i;

	rc = eth->mac_init(dev);
	if (rc) {
		pr_err("%s: Couldn't cofigure MAC!\n", __func__);
		return rc;
	}

	/* disable DMA */
	dma->disable_dma(dma, MAC_DMA_RX);
	dma->disable_dma(dma, MAC_DMA_TX);

	eth->port_num = 0;
	debug("Connecting PHY 0...\n");
	phydev = phy_connect(miiphy_get_dev_by_name(dev->name),
			     -1, dev, eth->phy_interface);
	if (phydev != NULL) {
		eth->port[0] = phydev;
		eth->port_num += 1;
	} else {
		debug("No PHY found for port 0\n");
	}

	for (i = 0; i < eth->port_num; i++)
		phy_config(eth->port[i]);

	return rc;
}

/*
 * u-boot net functions
 */

static int bcm_sf2_eth_send(struct eth_device *dev, void *packet, int length)
{
	struct eth_dma *dma = &(((struct eth_info *)(dev->priv))->dma);
	uint8_t *buf = (uint8_t *)packet;
	int rc = 0;
	int i = 0;

	debug("%s enter\n", __func__);

	/* load buf and start transmit */
	rc = dma->tx_packet(dma, buf, length);
	if (rc) {
		debug("ERROR - Tx failed\n");
		return rc;
	}

	while (!(dma->check_tx_done(dma))) {
		udelay(100);
		debug(".");
		i++;
		if (i > 20) {
			pr_err("%s: Tx timeout: retried 20 times\n", __func__);
			rc = -1;
			break;
		}
	}

	debug("%s exit rc(0x%x)\n", __func__, rc);
	return rc;
}

static int bcm_sf2_eth_receive(struct eth_device *dev)
{
	struct eth_dma *dma = &(((struct eth_info *)(dev->priv))->dma);
	uint8_t *buf = (uint8_t *)net_rx_packets[0];
	int rcvlen;
	int rc = 0;
	int i = 0;

	while (1) {
		/* Poll Rx queue to get a packet */
		rcvlen = dma->check_rx_done(dma, buf);
		if (rcvlen < 0) {
			/* No packet received */
			rc = -1;
			debug("\nNO More Rx\n");
			break;
		} else if ((rcvlen == 0) || (rcvlen > RX_BUF_SIZE)) {
			pr_err("%s: Wrong Ethernet packet size (%d B), skip!\n",
			      __func__, rcvlen);
			break;
		} else {
			debug("recieved\n");

			/* Forward received packet to uboot network handler */
			net_process_received_packet(buf, rcvlen);

			if (++i >= PKTBUFSRX)
				i = 0;
			buf = net_rx_packets[i];
		}
	}

	return rc;
}

static int bcm_sf2_eth_write_hwaddr(struct eth_device *dev)
{
	struct eth_info *eth = (struct eth_info *)(dev->priv);

	printf(" ETH MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
	       dev->enetaddr[0], dev->enetaddr[1], dev->enetaddr[2],
	       dev->enetaddr[3], dev->enetaddr[4], dev->enetaddr[5]);

	return eth->set_mac_addr(dev->enetaddr);
}

static int bcm_sf2_eth_open(struct eth_device *dev, struct bd_info *bt)
{
	struct eth_info *eth = (struct eth_info *)(dev->priv);
	struct eth_dma *dma = &(eth->dma);
	int i;

	debug("Enabling BCM SF2 Ethernet.\n");

	eth->enable_mac();

	/* enable tx and rx DMA */
	dma->enable_dma(dma, MAC_DMA_RX);
	dma->enable_dma(dma, MAC_DMA_TX);

	/*
	 * Need to start PHY here because link speed can change
	 * before each ethernet operation
	 */
	for (i = 0; i < eth->port_num; i++) {
		if (phy_startup(eth->port[i])) {
			pr_err("%s: PHY %d startup failed!\n", __func__, i);
			if (i == CONFIG_BCM_SF2_ETH_DEFAULT_PORT) {
				pr_err("%s: No default port %d!\n", __func__, i);
				return -1;
			}
		}
	}

	/* Set MAC speed using default port */
	i = CONFIG_BCM_SF2_ETH_DEFAULT_PORT;
	debug("PHY %d: speed:%d, duplex:%d, link:%d\n", i,
	      eth->port[i]->speed, eth->port[i]->duplex, eth->port[i]->link);
	eth->set_mac_speed(eth->port[i]->speed, eth->port[i]->duplex);

	debug("Enable Ethernet Done.\n");

	return 0;
}

static void bcm_sf2_eth_close(struct eth_device *dev)
{
	struct eth_info *eth = (struct eth_info *)(dev->priv);
	struct eth_dma *dma = &(eth->dma);

	/* disable DMA */
	dma->disable_dma(dma, MAC_DMA_RX);
	dma->disable_dma(dma, MAC_DMA_TX);

	eth->disable_mac();
}

int bcm_sf2_eth_register(struct bd_info *bis, u8 dev_num)
{
	struct eth_device *dev;
	struct eth_info *eth;
	int rc;

	dev = (struct eth_device *)malloc(sizeof(struct eth_device));
	if (dev == NULL) {
		pr_err("%s: Not enough memory!\n", __func__);
		return -1;
	}

	eth = (struct eth_info *)malloc(sizeof(struct eth_info));
	if (eth == NULL) {
		pr_err("%s: Not enough memory!\n", __func__);
		return -1;
	}

	printf(banner);

	memset(dev, 0, sizeof(*dev));
	sprintf(dev->name, "%s_%s-%hu", BCM_SF2_ETH_DEV_NAME,
		BCM_SF2_ETH_MAC_NAME, dev_num);

	dev->priv = (void *)eth;
	dev->iobase = 0;

	dev->init = bcm_sf2_eth_open;
	dev->halt = bcm_sf2_eth_close;
	dev->send = bcm_sf2_eth_send;
	dev->recv = bcm_sf2_eth_receive;
	dev->write_hwaddr = bcm_sf2_eth_write_hwaddr;

#ifdef CONFIG_BCM_SF2_ETH_GMAC
	if (gmac_add(dev)) {
		free(eth);
		free(dev);
		pr_err("%s: Adding GMAC failed!\n", __func__);
		return -1;
	}
#else
#error "bcm_sf2_eth: NEED to register a MAC!"
#endif

	eth_register(dev);

#ifdef CONFIG_CMD_MII
	int retval;
	struct mii_dev *mdiodev = mdio_alloc();

	if (!mdiodev)
		return -ENOMEM;
	strlcpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
	mdiodev->read = eth->miiphy_read;
	mdiodev->write = eth->miiphy_write;

	retval = mdio_register(mdiodev);
	if (retval < 0)
		return retval;
#endif

	/* Initialization */
	debug("Ethernet initialization ...");

	rc = bcm_sf2_eth_init(dev);
	if (rc != 0) {
		pr_err("%s: configuration failed!\n", __func__);
		return -1;
	}

	printf("Basic ethernet functionality initialized\n");

	return 0;
}