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>
14 #include <linux/types.h>
23 static const struct chip_id chip_ids[] = {
24 { CHIP_89218, "LAN89218" },
25 { CHIP_9115, "LAN9115" },
26 { CHIP_9116, "LAN9116" },
27 { CHIP_9117, "LAN9117" },
28 { CHIP_9118, "LAN9118" },
29 { CHIP_9211, "LAN9211" },
30 { CHIP_9215, "LAN9215" },
31 { CHIP_9216, "LAN9216" },
32 { CHIP_9217, "LAN9217" },
33 { CHIP_9218, "LAN9218" },
34 { CHIP_9220, "LAN9220" },
35 { CHIP_9221, "LAN9221" },
39 #define DRIVERNAME "smc911x"
41 #if defined (CONFIG_SMC911X_32_BIT) && \
42 defined (CONFIG_SMC911X_16_BIT)
43 #error "SMC911X: Only one of CONFIG_SMC911X_32_BIT and \
44 CONFIG_SMC911X_16_BIT shall be set"
47 #if defined (CONFIG_SMC911X_32_BIT)
48 static u32 smc911x_reg_read(struct eth_device *dev, u32 offset)
50 return readl(dev->iobase + offset);
53 static void smc911x_reg_write(struct eth_device *dev, u32 offset, u32 val)
55 writel(val, dev->iobase + offset);
57 #elif defined (CONFIG_SMC911X_16_BIT)
58 static u32 smc911x_reg_read(struct eth_device *dev, u32 offset)
60 return (readw(dev->iobase + offset) & 0xffff) |
61 (readw(dev->iobase + offset + 2) << 16);
63 static void smc911x_reg_write(struct eth_device *dev, u32 offset, u32 val)
65 writew(val & 0xffff, dev->iobase + offset);
66 writew(val >> 16, dev->iobase + offset + 2);
69 #error "SMC911X: undefined bus width"
70 #endif /* CONFIG_SMC911X_16_BIT */
72 static u32 smc911x_get_mac_csr(struct eth_device *dev, u8 reg)
74 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
76 smc911x_reg_write(dev, MAC_CSR_CMD,
77 MAC_CSR_CMD_CSR_BUSY | MAC_CSR_CMD_R_NOT_W | reg);
78 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
81 return smc911x_reg_read(dev, MAC_CSR_DATA);
84 static void smc911x_set_mac_csr(struct eth_device *dev, u8 reg, u32 data)
86 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
88 smc911x_reg_write(dev, MAC_CSR_DATA, data);
89 smc911x_reg_write(dev, MAC_CSR_CMD, MAC_CSR_CMD_CSR_BUSY | reg);
90 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
94 static int smc911x_detect_chip(struct eth_device *dev)
98 val = smc911x_reg_read(dev, BYTE_TEST);
99 if (val == 0xffffffff) {
100 /* Special case -- no chip present */
102 } else if (val != 0x87654321) {
103 printf(DRIVERNAME ": Invalid chip endian 0x%08lx\n", val);
107 val = smc911x_reg_read(dev, ID_REV) >> 16;
108 for (i = 0; chip_ids[i].id != 0; i++) {
109 if (chip_ids[i].id == val) break;
111 if (!chip_ids[i].id) {
112 printf(DRIVERNAME ": Unknown chip ID %04lx\n", val);
116 dev->priv = (void *)&chip_ids[i];
121 static void smc911x_reset(struct eth_device *dev)
126 * Take out of PM setting first
127 * Device is already wake up if PMT_CTRL_READY bit is set
129 if ((smc911x_reg_read(dev, PMT_CTRL) & PMT_CTRL_READY) == 0) {
130 /* Write to the bytetest will take out of powerdown */
131 smc911x_reg_write(dev, BYTE_TEST, 0x0);
136 !(smc911x_reg_read(dev, PMT_CTRL) & PMT_CTRL_READY))
140 ": timeout waiting for PM restore\n");
145 /* Disable interrupts */
146 smc911x_reg_write(dev, INT_EN, 0);
148 smc911x_reg_write(dev, HW_CFG, HW_CFG_SRST);
151 while (timeout-- && smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY)
155 printf(DRIVERNAME ": reset timeout\n");
159 /* Reset the FIFO level and flow control settings */
160 smc911x_set_mac_csr(dev, FLOW, FLOW_FCPT | FLOW_FCEN);
161 smc911x_reg_write(dev, AFC_CFG, 0x0050287F);
163 /* Set to LED outputs */
164 smc911x_reg_write(dev, GPIO_CFG, 0x70070000);
167 static void smc911x_handle_mac_address(struct eth_device *dev)
169 unsigned long addrh, addrl;
170 uchar *m = dev->enetaddr;
172 addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
173 addrh = m[4] | (m[5] << 8);
174 smc911x_set_mac_csr(dev, ADDRL, addrl);
175 smc911x_set_mac_csr(dev, ADDRH, addrh);
177 printf(DRIVERNAME ": MAC %pM\n", m);
180 static int smc911x_eth_phy_read(struct eth_device *dev,
181 u8 phy, u8 reg, u16 *val)
183 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
186 smc911x_set_mac_csr(dev, MII_ACC, phy << 11 | reg << 6 |
189 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
192 *val = smc911x_get_mac_csr(dev, MII_DATA);
197 static int smc911x_eth_phy_write(struct eth_device *dev,
198 u8 phy, u8 reg, u16 val)
200 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
203 smc911x_set_mac_csr(dev, MII_DATA, val);
204 smc911x_set_mac_csr(dev, MII_ACC,
205 phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
207 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
212 static int smc911x_phy_reset(struct eth_device *dev)
216 reg = smc911x_reg_read(dev, PMT_CTRL);
218 reg |= PMT_CTRL_PHY_RST;
219 smc911x_reg_write(dev, PMT_CTRL, reg);
226 static void smc911x_phy_configure(struct eth_device *dev)
231 smc911x_phy_reset(dev);
233 smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_RESET);
235 smc911x_eth_phy_write(dev, 1, MII_ADVERTISE, 0x01e1);
236 smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_ANENABLE |
242 if ((timeout--) == 0)
245 if (smc911x_eth_phy_read(dev, 1, MII_BMSR, &status) != 0)
247 } while (!(status & BMSR_LSTATUS));
249 printf(DRIVERNAME ": phy initialized\n");
254 printf(DRIVERNAME ": autonegotiation timed out\n");
257 static void smc911x_enable(struct eth_device *dev)
260 smc911x_reg_write(dev, HW_CFG, 8 << 16 | HW_CFG_SF);
262 smc911x_reg_write(dev, GPT_CFG, GPT_CFG_TIMER_EN | 10000);
264 smc911x_reg_write(dev, TX_CFG, TX_CFG_TX_ON);
266 /* no padding to start of packets */
267 smc911x_reg_write(dev, RX_CFG, 0);
269 smc911x_set_mac_csr(dev, MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN |
273 static int smc911x_init(struct eth_device *dev, bd_t * bd)
275 struct chip_id *id = dev->priv;
277 printf(DRIVERNAME ": detected %s controller\n", id->name);
281 /* Configure the PHY, initialize the link state */
282 smc911x_phy_configure(dev);
284 smc911x_handle_mac_address(dev);
286 /* Turn on Tx + Rx */
292 static int smc911x_send(struct eth_device *dev, void *packet, int length)
294 u32 *data = (u32*)packet;
298 smc911x_reg_write(dev, TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG |
299 TX_CMD_A_INT_LAST_SEG | length);
300 smc911x_reg_write(dev, TX_DATA_FIFO, length);
302 tmplen = (length + 3) / 4;
305 smc911x_reg_write(dev, TX_DATA_FIFO, *data++);
307 /* wait for transmission */
308 while (!((smc911x_reg_read(dev, TX_FIFO_INF) &
309 TX_FIFO_INF_TSUSED) >> 16));
311 /* get status. Ignore 'no carrier' error, it has no meaning for
312 * full duplex operation
314 status = smc911x_reg_read(dev, TX_STATUS_FIFO) &
315 (TX_STS_LOC | TX_STS_LATE_COLL | TX_STS_MANY_COLL |
316 TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
321 printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
322 status & TX_STS_LOC ? "TX_STS_LOC " : "",
323 status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
324 status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
325 status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
326 status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
331 static void smc911x_halt(struct eth_device *dev)
334 smc911x_handle_mac_address(dev);
337 static int smc911x_recv(struct eth_device *dev)
339 u32 *data = (u32 *)net_rx_packets[0];
343 if ((smc911x_reg_read(dev, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
344 status = smc911x_reg_read(dev, RX_STATUS_FIFO);
345 pktlen = (status & RX_STS_PKT_LEN) >> 16;
347 smc911x_reg_write(dev, RX_CFG, 0);
349 tmplen = (pktlen + 3) / 4;
351 *data++ = smc911x_reg_read(dev, RX_DATA_FIFO);
353 if (status & RX_STS_ES)
355 ": dropped bad packet. Status: 0x%08x\n",
358 net_process_received_packet(net_rx_packets[0], pktlen);
364 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
365 /* wrapper for smc911x_eth_phy_read */
366 static int smc911x_miiphy_read(struct mii_dev *bus, int phy, int devad,
369 struct eth_device *dev = eth_get_dev_by_name(bus->name);
376 ret = smc911x_eth_phy_read(dev, phy, reg, &val);
382 /* wrapper for smc911x_eth_phy_write */
383 static int smc911x_miiphy_write(struct mii_dev *bus, int phy, int devad,
386 struct eth_device *dev = eth_get_dev_by_name(bus->name);
391 return smc911x_eth_phy_write(dev, phy, reg, val);
394 static int smc911x_initialize_mii(struct eth_device *dev)
396 struct mii_dev *mdiodev = mdio_alloc();
402 strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
403 mdiodev->read = smc911x_miiphy_read;
404 mdiodev->write = smc911x_miiphy_write;
406 ret = mdio_register(mdiodev);
415 static int smc911x_initialize_mii(struct eth_device *dev)
421 int smc911x_initialize(u8 dev_num, int base_addr)
423 unsigned long addrl, addrh;
424 struct eth_device *dev;
427 dev = calloc(1, sizeof(*dev));
431 dev->iobase = base_addr;
433 /* Try to detect chip. Will fail if not present. */
434 ret = smc911x_detect_chip(dev);
436 ret = 0; /* Card not detected is not an error */
440 addrh = smc911x_get_mac_csr(dev, ADDRH);
441 addrl = smc911x_get_mac_csr(dev, ADDRL);
442 if (!(addrl == 0xffffffff && addrh == 0x0000ffff)) {
443 /* address is obtained from optional eeprom */
444 dev->enetaddr[0] = addrl;
445 dev->enetaddr[1] = addrl >> 8;
446 dev->enetaddr[2] = addrl >> 16;
447 dev->enetaddr[3] = addrl >> 24;
448 dev->enetaddr[4] = addrh;
449 dev->enetaddr[5] = addrh >> 8;
452 dev->init = smc911x_init;
453 dev->halt = smc911x_halt;
454 dev->send = smc911x_send;
455 dev->recv = smc911x_recv;
456 sprintf(dev->name, "%s-%hu", DRIVERNAME, dev_num);
460 ret = smc911x_initialize_mii(dev);