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;
42 unsigned char *m = bd->bi_enetaddr;
44 /* if the environment has a valid mac address then use it */
45 if ((m[0] | m[1] | m[2] | m[3] | m[4] | m[5])) {
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(ADDRH, addrh);
49 smc911x_set_mac_csr(ADDRL, addrl);
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");
70 printf(DRIVERNAME ": MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
71 m[0], m[1], m[2], m[3], m[4], m[5]);
76 static int smc911x_miiphy_read(u8 phy, u8 reg, u16 *val)
78 while (smc911x_get_mac_csr(MII_ACC) & MII_ACC_MII_BUSY)
81 smc911x_set_mac_csr(MII_ACC, phy << 11 | reg << 6 | MII_ACC_MII_BUSY);
83 while (smc911x_get_mac_csr(MII_ACC) & MII_ACC_MII_BUSY)
86 *val = smc911x_get_mac_csr(MII_DATA);
91 static int smc911x_miiphy_write(u8 phy, u8 reg, u16 val)
93 while (smc911x_get_mac_csr(MII_ACC) & MII_ACC_MII_BUSY)
96 smc911x_set_mac_csr(MII_DATA, val);
97 smc911x_set_mac_csr(MII_ACC,
98 phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
100 while (smc911x_get_mac_csr(MII_ACC) & MII_ACC_MII_BUSY)
105 static int smc911x_phy_reset(void)
109 reg = smc911x_reg_read(PMT_CTRL);
111 reg |= PMT_CTRL_PHY_RST;
112 smc911x_reg_write(PMT_CTRL, reg);
119 static void smc911x_phy_configure(void)
126 smc911x_miiphy_write(1, PHY_BMCR, PHY_BMCR_RESET);
128 smc911x_miiphy_write(1, PHY_ANAR, 0x01e1);
129 smc911x_miiphy_write(1, PHY_BMCR, PHY_BMCR_AUTON | PHY_BMCR_RST_NEG);
134 if ((timeout--) == 0)
137 if (smc911x_miiphy_read(1, PHY_BMSR, &status) != 0)
139 } while (!(status & PHY_BMSR_LS));
141 printf(DRIVERNAME ": phy initialized\n");
146 printf(DRIVERNAME ": autonegotiation timed out\n");
149 static void smc911x_enable(void)
152 smc911x_reg_write(HW_CFG, 8 << 16 | HW_CFG_SF);
154 smc911x_reg_write(GPT_CFG, GPT_CFG_TIMER_EN | 10000);
156 smc911x_reg_write(TX_CFG, TX_CFG_TX_ON);
158 /* no padding to start of packets */
159 smc911x_reg_write(RX_CFG, 0);
161 smc911x_set_mac_csr(MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN | MAC_CR_HBDIS);
165 int eth_init(bd_t *bd)
167 printf(DRIVERNAME ": initializing\n");
169 if (smc911x_detect_chip())
174 /* Configure the PHY, initialize the link state */
175 smc911x_phy_configure();
177 if (smx911x_handle_mac_address(bd))
180 /* Turn on Tx + Rx */
189 int eth_send(volatile void *packet, int length)
191 u32 *data = (u32*)packet;
195 smc911x_reg_write(TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG | TX_CMD_A_INT_LAST_SEG | length);
196 smc911x_reg_write(TX_DATA_FIFO, length);
198 tmplen = (length + 3) / 4;
201 pkt_data_push(TX_DATA_FIFO, *data++);
203 /* wait for transmission */
204 while (!((smc911x_reg_read(TX_FIFO_INF) & TX_FIFO_INF_TSUSED) >> 16));
206 /* get status. Ignore 'no carrier' error, it has no meaning for
207 * full duplex operation
209 status = smc911x_reg_read(TX_STATUS_FIFO) & (TX_STS_LOC | TX_STS_LATE_COLL |
210 TX_STS_MANY_COLL | TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
215 printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
216 status & TX_STS_LOC ? "TX_STS_LOC " : "",
217 status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
218 status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
219 status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
220 status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
232 u32 *data = (u32 *)NetRxPackets[0];
236 if ((smc911x_reg_read(RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
237 status = smc911x_reg_read(RX_STATUS_FIFO);
238 pktlen = (status & RX_STS_PKT_LEN) >> 16;
240 smc911x_reg_write(RX_CFG, 0);
242 tmplen = (pktlen + 2+ 3) / 4;
244 *data++ = pkt_data_pull(RX_DATA_FIFO);
246 if (status & RX_STS_ES)
248 ": dropped bad packet. Status: 0x%08x\n",
251 NetReceive(NetRxPackets[0], pktlen);