1 // SPDX-License-Identifier: GPL-2.0+
3 * SMSC LAN9[12]1[567] Network driver
5 * (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
13 #include <linux/types.h>
22 static const struct chip_id chip_ids[] = {
23 { CHIP_89218, "LAN89218" },
24 { CHIP_9115, "LAN9115" },
25 { CHIP_9116, "LAN9116" },
26 { CHIP_9117, "LAN9117" },
27 { CHIP_9118, "LAN9118" },
28 { CHIP_9211, "LAN9211" },
29 { CHIP_9215, "LAN9215" },
30 { CHIP_9216, "LAN9216" },
31 { CHIP_9217, "LAN9217" },
32 { CHIP_9218, "LAN9218" },
33 { CHIP_9220, "LAN9220" },
34 { CHIP_9221, "LAN9221" },
38 #define DRIVERNAME "smc911x"
40 #if defined (CONFIG_SMC911X_32_BIT) && \
41 defined (CONFIG_SMC911X_16_BIT)
42 #error "SMC911X: Only one of CONFIG_SMC911X_32_BIT and \
43 CONFIG_SMC911X_16_BIT shall be set"
46 #if defined (CONFIG_SMC911X_32_BIT)
47 static u32 smc911x_reg_read(struct eth_device *dev, u32 offset)
49 return *(volatile u32*)(dev->iobase + offset);
52 static void smc911x_reg_write(struct eth_device *dev, u32 offset, u32 val)
54 *(volatile u32*)(dev->iobase + offset) = val;
56 #elif defined (CONFIG_SMC911X_16_BIT)
57 static u32 smc911x_reg_read(struct eth_device *dev, u32 offset)
59 volatile u16 *addr_16 = (u16 *)(dev->iobase + offset);
60 return ((*addr_16 & 0x0000ffff) | (*(addr_16 + 1) << 16));
62 static void smc911x_reg_write(struct eth_device *dev, u32 offset, u32 val)
64 *(volatile u16 *)(dev->iobase + offset) = (u16)val;
65 *(volatile u16 *)(dev->iobase + offset + 2) = (u16)(val >> 16);
68 #error "SMC911X: undefined bus width"
69 #endif /* CONFIG_SMC911X_16_BIT */
71 static u32 smc911x_get_mac_csr(struct eth_device *dev, u8 reg)
73 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
75 smc911x_reg_write(dev, MAC_CSR_CMD,
76 MAC_CSR_CMD_CSR_BUSY | MAC_CSR_CMD_R_NOT_W | reg);
77 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
80 return smc911x_reg_read(dev, MAC_CSR_DATA);
83 static void smc911x_set_mac_csr(struct eth_device *dev, u8 reg, u32 data)
85 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
87 smc911x_reg_write(dev, MAC_CSR_DATA, data);
88 smc911x_reg_write(dev, MAC_CSR_CMD, MAC_CSR_CMD_CSR_BUSY | reg);
89 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
93 static int smc911x_detect_chip(struct eth_device *dev)
97 val = smc911x_reg_read(dev, BYTE_TEST);
98 if (val == 0xffffffff) {
99 /* Special case -- no chip present */
101 } else if (val != 0x87654321) {
102 printf(DRIVERNAME ": Invalid chip endian 0x%08lx\n", val);
106 val = smc911x_reg_read(dev, ID_REV) >> 16;
107 for (i = 0; chip_ids[i].id != 0; i++) {
108 if (chip_ids[i].id == val) break;
110 if (!chip_ids[i].id) {
111 printf(DRIVERNAME ": Unknown chip ID %04lx\n", val);
115 dev->priv = (void *)&chip_ids[i];
120 static void smc911x_reset(struct eth_device *dev)
125 * Take out of PM setting first
126 * Device is already wake up if PMT_CTRL_READY bit is set
128 if ((smc911x_reg_read(dev, PMT_CTRL) & PMT_CTRL_READY) == 0) {
129 /* Write to the bytetest will take out of powerdown */
130 smc911x_reg_write(dev, BYTE_TEST, 0x0);
135 !(smc911x_reg_read(dev, PMT_CTRL) & PMT_CTRL_READY))
139 ": timeout waiting for PM restore\n");
144 /* Disable interrupts */
145 smc911x_reg_write(dev, INT_EN, 0);
147 smc911x_reg_write(dev, HW_CFG, HW_CFG_SRST);
150 while (timeout-- && smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY)
154 printf(DRIVERNAME ": reset timeout\n");
158 /* Reset the FIFO level and flow control settings */
159 smc911x_set_mac_csr(dev, FLOW, FLOW_FCPT | FLOW_FCEN);
160 smc911x_reg_write(dev, AFC_CFG, 0x0050287F);
162 /* Set to LED outputs */
163 smc911x_reg_write(dev, GPIO_CFG, 0x70070000);
166 static void smc911x_handle_mac_address(struct eth_device *dev)
168 unsigned long addrh, addrl;
169 uchar *m = dev->enetaddr;
171 addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
172 addrh = m[4] | (m[5] << 8);
173 smc911x_set_mac_csr(dev, ADDRL, addrl);
174 smc911x_set_mac_csr(dev, ADDRH, addrh);
176 printf(DRIVERNAME ": MAC %pM\n", m);
179 static int smc911x_eth_phy_read(struct eth_device *dev,
180 u8 phy, u8 reg, u16 *val)
182 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
185 smc911x_set_mac_csr(dev, MII_ACC, phy << 11 | reg << 6 |
188 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
191 *val = smc911x_get_mac_csr(dev, MII_DATA);
196 static int smc911x_eth_phy_write(struct eth_device *dev,
197 u8 phy, u8 reg, u16 val)
199 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
202 smc911x_set_mac_csr(dev, MII_DATA, val);
203 smc911x_set_mac_csr(dev, MII_ACC,
204 phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
206 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
211 static int smc911x_phy_reset(struct eth_device *dev)
215 reg = smc911x_reg_read(dev, PMT_CTRL);
217 reg |= PMT_CTRL_PHY_RST;
218 smc911x_reg_write(dev, PMT_CTRL, reg);
225 static void smc911x_phy_configure(struct eth_device *dev)
230 smc911x_phy_reset(dev);
232 smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_RESET);
234 smc911x_eth_phy_write(dev, 1, MII_ADVERTISE, 0x01e1);
235 smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_ANENABLE |
241 if ((timeout--) == 0)
244 if (smc911x_eth_phy_read(dev, 1, MII_BMSR, &status) != 0)
246 } while (!(status & BMSR_LSTATUS));
248 printf(DRIVERNAME ": phy initialized\n");
253 printf(DRIVERNAME ": autonegotiation timed out\n");
256 static void smc911x_enable(struct eth_device *dev)
259 smc911x_reg_write(dev, HW_CFG, 8 << 16 | HW_CFG_SF);
261 smc911x_reg_write(dev, GPT_CFG, GPT_CFG_TIMER_EN | 10000);
263 smc911x_reg_write(dev, TX_CFG, TX_CFG_TX_ON);
265 /* no padding to start of packets */
266 smc911x_reg_write(dev, RX_CFG, 0);
268 smc911x_set_mac_csr(dev, MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN |
272 static int smc911x_init(struct eth_device *dev, bd_t * bd)
274 struct chip_id *id = dev->priv;
276 printf(DRIVERNAME ": detected %s controller\n", id->name);
280 /* Configure the PHY, initialize the link state */
281 smc911x_phy_configure(dev);
283 smc911x_handle_mac_address(dev);
285 /* Turn on Tx + Rx */
291 static int smc911x_send(struct eth_device *dev, void *packet, int length)
293 u32 *data = (u32*)packet;
297 smc911x_reg_write(dev, TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG |
298 TX_CMD_A_INT_LAST_SEG | length);
299 smc911x_reg_write(dev, TX_DATA_FIFO, length);
301 tmplen = (length + 3) / 4;
304 smc911x_reg_write(dev, TX_DATA_FIFO, *data++);
306 /* wait for transmission */
307 while (!((smc911x_reg_read(dev, TX_FIFO_INF) &
308 TX_FIFO_INF_TSUSED) >> 16));
310 /* get status. Ignore 'no carrier' error, it has no meaning for
311 * full duplex operation
313 status = smc911x_reg_read(dev, TX_STATUS_FIFO) &
314 (TX_STS_LOC | TX_STS_LATE_COLL | TX_STS_MANY_COLL |
315 TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
320 printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
321 status & TX_STS_LOC ? "TX_STS_LOC " : "",
322 status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
323 status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
324 status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
325 status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
330 static void smc911x_halt(struct eth_device *dev)
333 smc911x_handle_mac_address(dev);
336 static int smc911x_recv(struct eth_device *dev)
338 u32 *data = (u32 *)net_rx_packets[0];
342 if ((smc911x_reg_read(dev, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
343 status = smc911x_reg_read(dev, RX_STATUS_FIFO);
344 pktlen = (status & RX_STS_PKT_LEN) >> 16;
346 smc911x_reg_write(dev, RX_CFG, 0);
348 tmplen = (pktlen + 3) / 4;
350 *data++ = smc911x_reg_read(dev, RX_DATA_FIFO);
352 if (status & RX_STS_ES)
354 ": dropped bad packet. Status: 0x%08x\n",
357 net_process_received_packet(net_rx_packets[0], pktlen);
363 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
364 /* wrapper for smc911x_eth_phy_read */
365 static int smc911x_miiphy_read(struct mii_dev *bus, int phy, int devad,
368 struct eth_device *dev = eth_get_dev_by_name(bus->name);
375 ret = smc911x_eth_phy_read(dev, phy, reg, &val);
381 /* wrapper for smc911x_eth_phy_write */
382 static int smc911x_miiphy_write(struct mii_dev *bus, int phy, int devad,
385 struct eth_device *dev = eth_get_dev_by_name(bus->name);
390 return smc911x_eth_phy_write(dev, phy, reg, val);
393 static int smc911x_initialize_mii(struct eth_device *dev)
395 struct mii_dev *mdiodev = mdio_alloc();
401 strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
402 mdiodev->read = smc911x_miiphy_read;
403 mdiodev->write = smc911x_miiphy_write;
405 ret = mdio_register(mdiodev);
414 static int smc911x_initialize_mii(struct eth_device *dev)
420 int smc911x_initialize(u8 dev_num, int base_addr)
422 unsigned long addrl, addrh;
423 struct eth_device *dev;
426 dev = calloc(1, sizeof(*dev));
430 dev->iobase = base_addr;
432 /* Try to detect chip. Will fail if not present. */
433 ret = smc911x_detect_chip(dev);
435 ret = 0; /* Card not detected is not an error */
439 addrh = smc911x_get_mac_csr(dev, ADDRH);
440 addrl = smc911x_get_mac_csr(dev, ADDRL);
441 if (!(addrl == 0xffffffff && addrh == 0x0000ffff)) {
442 /* address is obtained from optional eeprom */
443 dev->enetaddr[0] = addrl;
444 dev->enetaddr[1] = addrl >> 8;
445 dev->enetaddr[2] = addrl >> 16;
446 dev->enetaddr[3] = addrl >> 24;
447 dev->enetaddr[4] = addrh;
448 dev->enetaddr[5] = addrh >> 8;
451 dev->init = smc911x_init;
452 dev->halt = smc911x_halt;
453 dev->send = smc911x_send;
454 dev->recv = smc911x_recv;
455 sprintf(dev->name, "%s-%hu", DRIVERNAME, dev_num);
459 ret = smc911x_initialize_mii(dev);