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Po-Yu Chuang750326e2009-08-10 11:00:00 +08001/*
2 * Faraday FTMAC100 Ethernet
3 *
4 * (C) Copyright 2009 Faraday Technology
5 * Po-Yu Chuang <ratbert@faraday-tech.com>
6 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02007 * SPDX-License-Identifier: GPL-2.0+
Po-Yu Chuang750326e2009-08-10 11:00:00 +08008 */
9
10#include <config.h>
11#include <common.h>
12#include <malloc.h>
13#include <net.h>
14#include <asm/io.h>
15
16#include "ftmac100.h"
17
18#define ETH_ZLEN 60
19
20struct ftmac100_data {
Po-Yu Chuang6f6e6e02011-01-21 15:50:37 +080021 struct ftmac100_txdes txdes[1];
22 struct ftmac100_rxdes rxdes[PKTBUFSRX];
Po-Yu Chuang750326e2009-08-10 11:00:00 +080023 int rx_index;
24};
25
26/*
27 * Reset MAC
28 */
29static void ftmac100_reset (struct eth_device *dev)
30{
31 struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase;
32
33 debug ("%s()\n", __func__);
34
35 writel (FTMAC100_MACCR_SW_RST, &ftmac100->maccr);
36
37 while (readl (&ftmac100->maccr) & FTMAC100_MACCR_SW_RST)
38 ;
39}
40
41/*
42 * Set MAC address
43 */
44static void ftmac100_set_mac (struct eth_device *dev, const unsigned char *mac)
45{
46 struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase;
47 unsigned int maddr = mac[0] << 8 | mac[1];
48 unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
49
50 debug ("%s(%x %x)\n", __func__, maddr, laddr);
51
52 writel (maddr, &ftmac100->mac_madr);
53 writel (laddr, &ftmac100->mac_ladr);
54}
55
56static void ftmac100_set_mac_from_env (struct eth_device *dev)
57{
58 eth_getenv_enetaddr ("ethaddr", dev->enetaddr);
59
60 ftmac100_set_mac (dev, dev->enetaddr);
61}
62
63/*
64 * disable transmitter, receiver
65 */
66static void ftmac100_halt (struct eth_device *dev)
67{
68 struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase;
69
70 debug ("%s()\n", __func__);
71
72 writel (0, &ftmac100->maccr);
73}
74
75static int ftmac100_init (struct eth_device *dev, bd_t *bd)
76{
77 struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase;
78 struct ftmac100_data *priv = dev->priv;
Po-Yu Chuang6f6e6e02011-01-21 15:50:37 +080079 struct ftmac100_txdes *txdes = priv->txdes;
80 struct ftmac100_rxdes *rxdes = priv->rxdes;
Po-Yu Chuang750326e2009-08-10 11:00:00 +080081 unsigned int maccr;
82 int i;
83
84 debug ("%s()\n", __func__);
85
86 ftmac100_reset (dev);
87
88 /* set the ethernet address */
89
90 ftmac100_set_mac_from_env (dev);
91
92 /* disable all interrupts */
93
94 writel (0, &ftmac100->imr);
95
96 /* initialize descriptors */
97
98 priv->rx_index = 0;
99
100 txdes[0].txdes1 = FTMAC100_TXDES1_EDOTR;
101 rxdes[PKTBUFSRX - 1].rxdes1 = FTMAC100_RXDES1_EDORR;
102
103 for (i = 0; i < PKTBUFSRX; i++) {
104 /* RXBUF_BADR */
Joe Hershberger1fd92db2015-04-08 01:41:06 -0500105 rxdes[i].rxdes2 = (unsigned int)net_rx_packets[i];
Po-Yu Chuang750326e2009-08-10 11:00:00 +0800106 rxdes[i].rxdes1 |= FTMAC100_RXDES1_RXBUF_SIZE (PKTSIZE_ALIGN);
107 rxdes[i].rxdes0 = FTMAC100_RXDES0_RXDMA_OWN;
108 }
109
110 /* transmit ring */
111
112 writel ((unsigned int)txdes, &ftmac100->txr_badr);
113
114 /* receive ring */
115
116 writel ((unsigned int)rxdes, &ftmac100->rxr_badr);
117
118 /* poll receive descriptor automatically */
119
120 writel (FTMAC100_APTC_RXPOLL_CNT (1), &ftmac100->aptc);
121
122 /* enable transmitter, receiver */
123
124 maccr = FTMAC100_MACCR_XMT_EN |
125 FTMAC100_MACCR_RCV_EN |
126 FTMAC100_MACCR_XDMA_EN |
127 FTMAC100_MACCR_RDMA_EN |
128 FTMAC100_MACCR_CRC_APD |
129 FTMAC100_MACCR_ENRX_IN_HALFTX |
130 FTMAC100_MACCR_RX_RUNT |
131 FTMAC100_MACCR_RX_BROADPKT;
132
133 writel (maccr, &ftmac100->maccr);
134
135 return 0;
136}
137
138/*
139 * Get a data block via Ethernet
140 */
141static int ftmac100_recv (struct eth_device *dev)
142{
143 struct ftmac100_data *priv = dev->priv;
Po-Yu Chuang6f6e6e02011-01-21 15:50:37 +0800144 struct ftmac100_rxdes *curr_des;
Po-Yu Chuang750326e2009-08-10 11:00:00 +0800145 unsigned short rxlen;
146
147 curr_des = &priv->rxdes[priv->rx_index];
148
149 if (curr_des->rxdes0 & FTMAC100_RXDES0_RXDMA_OWN)
150 return -1;
151
152 if (curr_des->rxdes0 & (FTMAC100_RXDES0_RX_ERR |
153 FTMAC100_RXDES0_CRC_ERR |
154 FTMAC100_RXDES0_FTL |
155 FTMAC100_RXDES0_RUNT |
156 FTMAC100_RXDES0_RX_ODD_NB)) {
157 return -1;
158 }
159
160 rxlen = FTMAC100_RXDES0_RFL (curr_des->rxdes0);
161
162 debug ("%s(): RX buffer %d, %x received\n",
163 __func__, priv->rx_index, rxlen);
164
165 /* pass the packet up to the protocol layers. */
166
Joe Hershberger1fd92db2015-04-08 01:41:06 -0500167 net_process_received_packet((void *)curr_des->rxdes2, rxlen);
Po-Yu Chuang750326e2009-08-10 11:00:00 +0800168
169 /* release buffer to DMA */
170
171 curr_des->rxdes0 |= FTMAC100_RXDES0_RXDMA_OWN;
172
173 priv->rx_index = (priv->rx_index + 1) % PKTBUFSRX;
174
175 return 0;
176}
177
178/*
179 * Send a data block via Ethernet
180 */
Joe Hershberger99ec7722012-05-21 14:45:28 +0000181static int ftmac100_send(struct eth_device *dev, void *packet, int length)
Po-Yu Chuang750326e2009-08-10 11:00:00 +0800182{
183 struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase;
184 struct ftmac100_data *priv = dev->priv;
Po-Yu Chuang6f6e6e02011-01-21 15:50:37 +0800185 struct ftmac100_txdes *curr_des = priv->txdes;
Po-Yu Chuang8d8fd5b2011-01-21 15:51:25 +0800186 ulong start;
Po-Yu Chuang750326e2009-08-10 11:00:00 +0800187
188 if (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
189 debug ("%s(): no TX descriptor available\n", __func__);
190 return -1;
191 }
192
193 debug ("%s(%x, %x)\n", __func__, (int)packet, length);
194
195 length = (length < ETH_ZLEN) ? ETH_ZLEN : length;
196
197 /* initiate a transmit sequence */
198
199 curr_des->txdes2 = (unsigned int)packet; /* TXBUF_BADR */
200
201 curr_des->txdes1 &= FTMAC100_TXDES1_EDOTR;
202 curr_des->txdes1 |= FTMAC100_TXDES1_FTS |
203 FTMAC100_TXDES1_LTS |
204 FTMAC100_TXDES1_TXBUF_SIZE (length);
205
206 curr_des->txdes0 = FTMAC100_TXDES0_TXDMA_OWN;
207
208 /* start transmit */
209
210 writel (1, &ftmac100->txpd);
211
212 /* wait for transfer to succeed */
213
Po-Yu Chuang8d8fd5b2011-01-21 15:51:25 +0800214 start = get_timer(0);
Po-Yu Chuang750326e2009-08-10 11:00:00 +0800215 while (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
Po-Yu Chuang8d8fd5b2011-01-21 15:51:25 +0800216 if (get_timer(start) >= 5) {
Po-Yu Chuang750326e2009-08-10 11:00:00 +0800217 debug ("%s(): timed out\n", __func__);
218 return -1;
219 }
220 }
221
222 debug ("%s(): packet sent\n", __func__);
223
224 return 0;
225}
226
227int ftmac100_initialize (bd_t *bd)
228{
229 struct eth_device *dev;
230 struct ftmac100_data *priv;
231
232 dev = malloc (sizeof *dev);
233 if (!dev) {
234 printf ("%s(): failed to allocate dev\n", __func__);
235 goto out;
236 }
237
238 /* Transmit and receive descriptors should align to 16 bytes */
239
240 priv = memalign (16, sizeof (struct ftmac100_data));
241 if (!priv) {
242 printf ("%s(): failed to allocate priv\n", __func__);
243 goto free_dev;
244 }
245
246 memset (dev, 0, sizeof (*dev));
247 memset (priv, 0, sizeof (*priv));
248
Ben Whitten192bc692015-12-30 13:05:58 +0000249 strcpy(dev->name, "FTMAC100");
Po-Yu Chuang750326e2009-08-10 11:00:00 +0800250 dev->iobase = CONFIG_FTMAC100_BASE;
251 dev->init = ftmac100_init;
252 dev->halt = ftmac100_halt;
253 dev->send = ftmac100_send;
254 dev->recv = ftmac100_recv;
255 dev->priv = priv;
256
257 eth_register (dev);
258
259 return 1;
260
261free_dev:
262 free (dev);
263out:
264 return 0;
265}