2 * SMSC LAN9[12]1[567] Network driver
4 * (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 u32 pkt_data_pull(u32 addr) \
33 __attribute__ ((weak, alias ("smc911x_reg_read")));
34 void pkt_data_push(u32 addr, u32 val) \
35 __attribute__ ((weak, alias ("smc911x_reg_write")));
37 #define mdelay(n) udelay((n)*1000)
39 static int smx911x_handle_mac_address(bd_t *bd)
41 unsigned long addrh, addrl;
44 if (eth_getenv_enetaddr("ethaddr", m)) {
45 /* if the environment has a valid mac address then use it */
46 addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
47 addrh = m[4] | (m[5] << 8);
48 smc911x_set_mac_csr(ADDRL, addrl);
49 smc911x_set_mac_csr(ADDRH, addrh);
51 /* if not, try to get one from the eeprom */
52 addrh = smc911x_get_mac_csr(ADDRH);
53 addrl = smc911x_get_mac_csr(ADDRL);
55 m[0] = (addrl ) & 0xff;
56 m[1] = (addrl >> 8 ) & 0xff;
57 m[2] = (addrl >> 16 ) & 0xff;
58 m[3] = (addrl >> 24 ) & 0xff;
59 m[4] = (addrh ) & 0xff;
60 m[5] = (addrh >> 8 ) & 0xff;
62 /* we get 0xff when there is no eeprom connected */
63 if ((m[0] & m[1] & m[2] & m[3] & m[4] & m[5]) == 0xff) {
64 printf(DRIVERNAME ": no valid mac address in environment "
65 "and no eeprom found\n");
69 eth_setenv_enetaddr("ethaddr", m);
72 printf(DRIVERNAME ": MAC %pM\n", m);
77 static int smc911x_miiphy_read(u8 phy, u8 reg, u16 *val)
79 while (smc911x_get_mac_csr(MII_ACC) & MII_ACC_MII_BUSY)
82 smc911x_set_mac_csr(MII_ACC, phy << 11 | reg << 6 | MII_ACC_MII_BUSY);
84 while (smc911x_get_mac_csr(MII_ACC) & MII_ACC_MII_BUSY)
87 *val = smc911x_get_mac_csr(MII_DATA);
92 static int smc911x_miiphy_write(u8 phy, u8 reg, u16 val)
94 while (smc911x_get_mac_csr(MII_ACC) & MII_ACC_MII_BUSY)
97 smc911x_set_mac_csr(MII_DATA, val);
98 smc911x_set_mac_csr(MII_ACC,
99 phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
101 while (smc911x_get_mac_csr(MII_ACC) & MII_ACC_MII_BUSY)
106 static int smc911x_phy_reset(void)
110 reg = smc911x_reg_read(PMT_CTRL);
112 reg |= PMT_CTRL_PHY_RST;
113 smc911x_reg_write(PMT_CTRL, reg);
120 static void smc911x_shutdown(void)
124 /* Turn of Rx and TX */
125 cr = smc911x_get_mac_csr(MAC_CR);
126 cr &= ~(MAC_CR_TXEN | MAC_CR_RXEN | MAC_CR_HBDIS);
127 smc911x_set_mac_csr(MAC_CR, cr);
129 /* Stop Transmission */
130 cr = smc911x_get_mac_csr(TX_CFG);
131 cr &= ~(TX_CFG_STOP_TX);
132 smc911x_set_mac_csr(TX_CFG, cr);
133 /* Stop receiving packets */
134 cr = smc911x_get_mac_csr(RX_CFG);
135 cr &= ~(RX_CFG_RXDOFF);
136 smc911x_set_mac_csr(RX_CFG, cr);
141 static void smc911x_phy_configure(void)
148 smc911x_miiphy_write(1, PHY_BMCR, PHY_BMCR_RESET);
150 smc911x_miiphy_write(1, PHY_ANAR, 0x01e1);
151 smc911x_miiphy_write(1, PHY_BMCR, PHY_BMCR_AUTON | PHY_BMCR_RST_NEG);
156 if ((timeout--) == 0)
159 if (smc911x_miiphy_read(1, PHY_BMSR, &status) != 0)
161 } while (!(status & PHY_BMSR_LS));
163 printf(DRIVERNAME ": phy initialized\n");
168 printf(DRIVERNAME ": autonegotiation timed out\n");
171 static void smc911x_enable(void)
174 smc911x_reg_write(HW_CFG, 8 << 16 | HW_CFG_SF);
176 smc911x_reg_write(GPT_CFG, GPT_CFG_TIMER_EN | 10000);
178 smc911x_reg_write(TX_CFG, TX_CFG_TX_ON);
180 /* no padding to start of packets */
181 smc911x_reg_write(RX_CFG, 0);
183 smc911x_set_mac_csr(MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN | MAC_CR_HBDIS);
187 int eth_init(bd_t *bd)
189 printf(DRIVERNAME ": initializing\n");
191 if (smc911x_detect_chip())
196 /* Configure the PHY, initialize the link state */
197 smc911x_phy_configure();
199 if (smx911x_handle_mac_address(bd))
202 /* Turn on Tx + Rx */
211 int eth_send(volatile void *packet, int length)
213 u32 *data = (u32*)packet;
217 smc911x_reg_write(TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG | TX_CMD_A_INT_LAST_SEG | length);
218 smc911x_reg_write(TX_DATA_FIFO, length);
220 tmplen = (length + 3) / 4;
223 pkt_data_push(TX_DATA_FIFO, *data++);
225 /* wait for transmission */
226 while (!((smc911x_reg_read(TX_FIFO_INF) & TX_FIFO_INF_TSUSED) >> 16));
228 /* get status. Ignore 'no carrier' error, it has no meaning for
229 * full duplex operation
231 status = smc911x_reg_read(TX_STATUS_FIFO) & (TX_STS_LOC | TX_STS_LATE_COLL |
232 TX_STS_MANY_COLL | TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
237 printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
238 status & TX_STS_LOC ? "TX_STS_LOC " : "",
239 status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
240 status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
241 status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
242 status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
254 u32 *data = (u32 *)NetRxPackets[0];
258 if ((smc911x_reg_read(RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
259 status = smc911x_reg_read(RX_STATUS_FIFO);
260 pktlen = (status & RX_STS_PKT_LEN) >> 16;
262 smc911x_reg_write(RX_CFG, 0);
264 tmplen = (pktlen + 2+ 3) / 4;
266 *data++ = pkt_data_pull(RX_DATA_FIFO);
268 if (status & RX_STS_ES)
270 ": dropped bad packet. Status: 0x%08x\n",
273 NetReceive(NetRxPackets[0], pktlen);