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 inline u32 __smc911x_reg_read(struct eth_device *dev, u32 offset)
49 return *(volatile u32*)(dev->iobase + offset);
51 u32 smc911x_reg_read(struct eth_device *dev, u32 offset)
52 __attribute__((weak, alias("__smc911x_reg_read")));
54 static inline void __smc911x_reg_write(struct eth_device *dev,
57 *(volatile u32*)(dev->iobase + offset) = val;
59 void smc911x_reg_write(struct eth_device *dev, u32 offset, u32 val)
60 __attribute__((weak, alias("__smc911x_reg_write")));
61 #elif defined (CONFIG_SMC911X_16_BIT)
62 static inline u32 smc911x_reg_read(struct eth_device *dev, u32 offset)
64 volatile u16 *addr_16 = (u16 *)(dev->iobase + offset);
65 return ((*addr_16 & 0x0000ffff) | (*(addr_16 + 1) << 16));
67 static inline void smc911x_reg_write(struct eth_device *dev,
70 *(volatile u16 *)(dev->iobase + offset) = (u16)val;
71 *(volatile u16 *)(dev->iobase + offset + 2) = (u16)(val >> 16);
74 #error "SMC911X: undefined bus width"
75 #endif /* CONFIG_SMC911X_16_BIT */
77 static u32 smc911x_get_mac_csr(struct eth_device *dev, u8 reg)
79 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
81 smc911x_reg_write(dev, MAC_CSR_CMD,
82 MAC_CSR_CMD_CSR_BUSY | MAC_CSR_CMD_R_NOT_W | reg);
83 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
86 return smc911x_reg_read(dev, MAC_CSR_DATA);
89 static void smc911x_set_mac_csr(struct eth_device *dev, u8 reg, u32 data)
91 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
93 smc911x_reg_write(dev, MAC_CSR_DATA, data);
94 smc911x_reg_write(dev, MAC_CSR_CMD, MAC_CSR_CMD_CSR_BUSY | reg);
95 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
99 static int smc911x_detect_chip(struct eth_device *dev)
101 unsigned long val, i;
103 val = smc911x_reg_read(dev, BYTE_TEST);
104 if (val == 0xffffffff) {
105 /* Special case -- no chip present */
107 } else if (val != 0x87654321) {
108 printf(DRIVERNAME ": Invalid chip endian 0x%08lx\n", val);
112 val = smc911x_reg_read(dev, ID_REV) >> 16;
113 for (i = 0; chip_ids[i].id != 0; i++) {
114 if (chip_ids[i].id == val) break;
116 if (!chip_ids[i].id) {
117 printf(DRIVERNAME ": Unknown chip ID %04lx\n", val);
121 dev->priv = (void *)&chip_ids[i];
126 static void smc911x_reset(struct eth_device *dev)
131 * Take out of PM setting first
132 * Device is already wake up if PMT_CTRL_READY bit is set
134 if ((smc911x_reg_read(dev, PMT_CTRL) & PMT_CTRL_READY) == 0) {
135 /* Write to the bytetest will take out of powerdown */
136 smc911x_reg_write(dev, BYTE_TEST, 0x0);
141 !(smc911x_reg_read(dev, PMT_CTRL) & PMT_CTRL_READY))
145 ": timeout waiting for PM restore\n");
150 /* Disable interrupts */
151 smc911x_reg_write(dev, INT_EN, 0);
153 smc911x_reg_write(dev, HW_CFG, HW_CFG_SRST);
156 while (timeout-- && smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY)
160 printf(DRIVERNAME ": reset timeout\n");
164 /* Reset the FIFO level and flow control settings */
165 smc911x_set_mac_csr(dev, FLOW, FLOW_FCPT | FLOW_FCEN);
166 smc911x_reg_write(dev, AFC_CFG, 0x0050287F);
168 /* Set to LED outputs */
169 smc911x_reg_write(dev, GPIO_CFG, 0x70070000);
172 static void smc911x_handle_mac_address(struct eth_device *dev)
174 unsigned long addrh, addrl;
175 uchar *m = dev->enetaddr;
177 addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
178 addrh = m[4] | (m[5] << 8);
179 smc911x_set_mac_csr(dev, ADDRL, addrl);
180 smc911x_set_mac_csr(dev, ADDRH, addrh);
182 printf(DRIVERNAME ": MAC %pM\n", m);
185 static int smc911x_eth_phy_read(struct eth_device *dev,
186 u8 phy, u8 reg, u16 *val)
188 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
191 smc911x_set_mac_csr(dev, MII_ACC, phy << 11 | reg << 6 |
194 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
197 *val = smc911x_get_mac_csr(dev, MII_DATA);
202 static int smc911x_eth_phy_write(struct eth_device *dev,
203 u8 phy, u8 reg, u16 val)
205 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
208 smc911x_set_mac_csr(dev, MII_DATA, val);
209 smc911x_set_mac_csr(dev, MII_ACC,
210 phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
212 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
217 static int smc911x_phy_reset(struct eth_device *dev)
221 reg = smc911x_reg_read(dev, PMT_CTRL);
223 reg |= PMT_CTRL_PHY_RST;
224 smc911x_reg_write(dev, PMT_CTRL, reg);
231 static void smc911x_phy_configure(struct eth_device *dev)
236 smc911x_phy_reset(dev);
238 smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_RESET);
240 smc911x_eth_phy_write(dev, 1, MII_ADVERTISE, 0x01e1);
241 smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_ANENABLE |
247 if ((timeout--) == 0)
250 if (smc911x_eth_phy_read(dev, 1, MII_BMSR, &status) != 0)
252 } while (!(status & BMSR_LSTATUS));
254 printf(DRIVERNAME ": phy initialized\n");
259 printf(DRIVERNAME ": autonegotiation timed out\n");
262 static void smc911x_enable(struct eth_device *dev)
265 smc911x_reg_write(dev, HW_CFG, 8 << 16 | HW_CFG_SF);
267 smc911x_reg_write(dev, GPT_CFG, GPT_CFG_TIMER_EN | 10000);
269 smc911x_reg_write(dev, TX_CFG, TX_CFG_TX_ON);
271 /* no padding to start of packets */
272 smc911x_reg_write(dev, RX_CFG, 0);
274 smc911x_set_mac_csr(dev, MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN |
278 static int smc911x_init(struct eth_device *dev, bd_t * bd)
280 struct chip_id *id = dev->priv;
282 printf(DRIVERNAME ": detected %s controller\n", id->name);
286 /* Configure the PHY, initialize the link state */
287 smc911x_phy_configure(dev);
289 smc911x_handle_mac_address(dev);
291 /* Turn on Tx + Rx */
297 static int smc911x_send(struct eth_device *dev, void *packet, int length)
299 u32 *data = (u32*)packet;
303 smc911x_reg_write(dev, TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG |
304 TX_CMD_A_INT_LAST_SEG | length);
305 smc911x_reg_write(dev, TX_DATA_FIFO, length);
307 tmplen = (length + 3) / 4;
310 smc911x_reg_write(dev, TX_DATA_FIFO, *data++);
312 /* wait for transmission */
313 while (!((smc911x_reg_read(dev, TX_FIFO_INF) &
314 TX_FIFO_INF_TSUSED) >> 16));
316 /* get status. Ignore 'no carrier' error, it has no meaning for
317 * full duplex operation
319 status = smc911x_reg_read(dev, TX_STATUS_FIFO) &
320 (TX_STS_LOC | TX_STS_LATE_COLL | TX_STS_MANY_COLL |
321 TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
326 printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
327 status & TX_STS_LOC ? "TX_STS_LOC " : "",
328 status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
329 status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
330 status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
331 status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
336 static void smc911x_halt(struct eth_device *dev)
339 smc911x_handle_mac_address(dev);
342 static int smc911x_recv(struct eth_device *dev)
344 u32 *data = (u32 *)net_rx_packets[0];
348 if ((smc911x_reg_read(dev, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
349 status = smc911x_reg_read(dev, RX_STATUS_FIFO);
350 pktlen = (status & RX_STS_PKT_LEN) >> 16;
352 smc911x_reg_write(dev, RX_CFG, 0);
354 tmplen = (pktlen + 3) / 4;
356 *data++ = smc911x_reg_read(dev, RX_DATA_FIFO);
358 if (status & RX_STS_ES)
360 ": dropped bad packet. Status: 0x%08x\n",
363 net_process_received_packet(net_rx_packets[0], pktlen);
369 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
370 /* wrapper for smc911x_eth_phy_read */
371 static int smc911x_miiphy_read(struct mii_dev *bus, int phy, int devad,
374 struct eth_device *dev = eth_get_dev_by_name(bus->name);
381 ret = smc911x_eth_phy_read(dev, phy, reg, &val);
387 /* wrapper for smc911x_eth_phy_write */
388 static int smc911x_miiphy_write(struct mii_dev *bus, int phy, int devad,
391 struct eth_device *dev = eth_get_dev_by_name(bus->name);
396 return smc911x_eth_phy_write(dev, phy, reg, val);
399 static int smc911x_initialize_mii(struct eth_device *dev)
401 struct mii_dev *mdiodev = mdio_alloc();
407 strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
408 mdiodev->read = smc911x_miiphy_read;
409 mdiodev->write = smc911x_miiphy_write;
411 ret = mdio_register(mdiodev);
420 static int smc911x_initialize_mii(struct eth_device *dev)
426 int smc911x_initialize(u8 dev_num, int base_addr)
428 unsigned long addrl, addrh;
429 struct eth_device *dev;
432 dev = calloc(1, sizeof(*dev));
436 dev->iobase = base_addr;
438 /* Try to detect chip. Will fail if not present. */
439 ret = smc911x_detect_chip(dev);
441 ret = 0; /* Card not detected is not an error */
445 addrh = smc911x_get_mac_csr(dev, ADDRH);
446 addrl = smc911x_get_mac_csr(dev, ADDRL);
447 if (!(addrl == 0xffffffff && addrh == 0x0000ffff)) {
448 /* address is obtained from optional eeprom */
449 dev->enetaddr[0] = addrl;
450 dev->enetaddr[1] = addrl >> 8;
451 dev->enetaddr[2] = addrl >> 16;
452 dev->enetaddr[3] = addrl >> 24;
453 dev->enetaddr[4] = addrh;
454 dev->enetaddr[5] = addrh >> 8;
457 dev->init = smc911x_init;
458 dev->halt = smc911x_halt;
459 dev->send = smc911x_send;
460 dev->recv = smc911x_recv;
461 sprintf(dev->name, "%s-%hu", DRIVERNAME, dev_num);
465 ret = smc911x_initialize_mii(dev);