2 * Faraday FTMAC100 Ethernet
4 * (C) Copyright 2009 Faraday Technology
5 * Po-Yu Chuang <ratbert@faraday-tech.com>
7 * SPDX-License-Identifier: GPL-2.0+
20 struct ftmac100_data
{
21 struct ftmac100_txdes txdes
[1];
22 struct ftmac100_rxdes rxdes
[PKTBUFSRX
];
29 static void ftmac100_reset (struct eth_device
*dev
)
31 struct ftmac100
*ftmac100
= (struct ftmac100
*)dev
->iobase
;
33 debug ("%s()\n", __func__
);
35 writel (FTMAC100_MACCR_SW_RST
, &ftmac100
->maccr
);
37 while (readl (&ftmac100
->maccr
) & FTMAC100_MACCR_SW_RST
)
44 static void ftmac100_set_mac (struct eth_device
*dev
, const unsigned char *mac
)
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];
50 debug ("%s(%x %x)\n", __func__
, maddr
, laddr
);
52 writel (maddr
, &ftmac100
->mac_madr
);
53 writel (laddr
, &ftmac100
->mac_ladr
);
56 static void ftmac100_set_mac_from_env (struct eth_device
*dev
)
58 eth_getenv_enetaddr ("ethaddr", dev
->enetaddr
);
60 ftmac100_set_mac (dev
, dev
->enetaddr
);
64 * disable transmitter, receiver
66 static void ftmac100_halt (struct eth_device
*dev
)
68 struct ftmac100
*ftmac100
= (struct ftmac100
*)dev
->iobase
;
70 debug ("%s()\n", __func__
);
72 writel (0, &ftmac100
->maccr
);
75 static int ftmac100_init (struct eth_device
*dev
, bd_t
*bd
)
77 struct ftmac100
*ftmac100
= (struct ftmac100
*)dev
->iobase
;
78 struct ftmac100_data
*priv
= dev
->priv
;
79 struct ftmac100_txdes
*txdes
= priv
->txdes
;
80 struct ftmac100_rxdes
*rxdes
= priv
->rxdes
;
84 debug ("%s()\n", __func__
);
88 /* set the ethernet address */
90 ftmac100_set_mac_from_env (dev
);
92 /* disable all interrupts */
94 writel (0, &ftmac100
->imr
);
96 /* initialize descriptors */
100 txdes
[0].txdes1
= FTMAC100_TXDES1_EDOTR
;
101 rxdes
[PKTBUFSRX
- 1].rxdes1
= FTMAC100_RXDES1_EDORR
;
103 for (i
= 0; i
< PKTBUFSRX
; i
++) {
105 rxdes
[i
].rxdes2
= (unsigned int)NetRxPackets
[i
];
106 rxdes
[i
].rxdes1
|= FTMAC100_RXDES1_RXBUF_SIZE (PKTSIZE_ALIGN
);
107 rxdes
[i
].rxdes0
= FTMAC100_RXDES0_RXDMA_OWN
;
112 writel ((unsigned int)txdes
, &ftmac100
->txr_badr
);
116 writel ((unsigned int)rxdes
, &ftmac100
->rxr_badr
);
118 /* poll receive descriptor automatically */
120 writel (FTMAC100_APTC_RXPOLL_CNT (1), &ftmac100
->aptc
);
122 /* enable transmitter, receiver */
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
;
133 writel (maccr
, &ftmac100
->maccr
);
139 * Get a data block via Ethernet
141 static int ftmac100_recv (struct eth_device
*dev
)
143 struct ftmac100_data
*priv
= dev
->priv
;
144 struct ftmac100_rxdes
*curr_des
;
145 unsigned short rxlen
;
147 curr_des
= &priv
->rxdes
[priv
->rx_index
];
149 if (curr_des
->rxdes0
& FTMAC100_RXDES0_RXDMA_OWN
)
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
)) {
160 rxlen
= FTMAC100_RXDES0_RFL (curr_des
->rxdes0
);
162 debug ("%s(): RX buffer %d, %x received\n",
163 __func__
, priv
->rx_index
, rxlen
);
165 /* pass the packet up to the protocol layers. */
167 NetReceive ((void *)curr_des
->rxdes2
, rxlen
);
169 /* release buffer to DMA */
171 curr_des
->rxdes0
|= FTMAC100_RXDES0_RXDMA_OWN
;
173 priv
->rx_index
= (priv
->rx_index
+ 1) % PKTBUFSRX
;
179 * Send a data block via Ethernet
181 static int ftmac100_send(struct eth_device
*dev
, void *packet
, int length
)
183 struct ftmac100
*ftmac100
= (struct ftmac100
*)dev
->iobase
;
184 struct ftmac100_data
*priv
= dev
->priv
;
185 struct ftmac100_txdes
*curr_des
= priv
->txdes
;
188 if (curr_des
->txdes0
& FTMAC100_TXDES0_TXDMA_OWN
) {
189 debug ("%s(): no TX descriptor available\n", __func__
);
193 debug ("%s(%x, %x)\n", __func__
, (int)packet
, length
);
195 length
= (length
< ETH_ZLEN
) ? ETH_ZLEN
: length
;
197 /* initiate a transmit sequence */
199 curr_des
->txdes2
= (unsigned int)packet
; /* TXBUF_BADR */
201 curr_des
->txdes1
&= FTMAC100_TXDES1_EDOTR
;
202 curr_des
->txdes1
|= FTMAC100_TXDES1_FTS
|
203 FTMAC100_TXDES1_LTS
|
204 FTMAC100_TXDES1_TXBUF_SIZE (length
);
206 curr_des
->txdes0
= FTMAC100_TXDES0_TXDMA_OWN
;
210 writel (1, &ftmac100
->txpd
);
212 /* wait for transfer to succeed */
214 start
= get_timer(0);
215 while (curr_des
->txdes0
& FTMAC100_TXDES0_TXDMA_OWN
) {
216 if (get_timer(start
) >= 5) {
217 debug ("%s(): timed out\n", __func__
);
222 debug ("%s(): packet sent\n", __func__
);
227 int ftmac100_initialize (bd_t
*bd
)
229 struct eth_device
*dev
;
230 struct ftmac100_data
*priv
;
232 dev
= malloc (sizeof *dev
);
234 printf ("%s(): failed to allocate dev\n", __func__
);
238 /* Transmit and receive descriptors should align to 16 bytes */
240 priv
= memalign (16, sizeof (struct ftmac100_data
));
242 printf ("%s(): failed to allocate priv\n", __func__
);
246 memset (dev
, 0, sizeof (*dev
));
247 memset (priv
, 0, sizeof (*priv
));
249 sprintf (dev
->name
, "FTMAC100");
250 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
;