1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * SMSC LAN9[12]1[567] Network driver
4 *
5 * (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
6 */
7
8 #include <common.h>
9 #include <command.h>
10 #include <malloc.h>
11 #include <net.h>
12 #include <miiphy.h>
13
14 #include "smc911x.h"
15
16 u32 pkt_data_pull(struct eth_device *dev, u32 addr) \
17 __attribute__ ((weak, alias ("smc911x_reg_read")));
18 void pkt_data_push(struct eth_device *dev, u32 addr, u32 val) \
19 __attribute__ ((weak, alias ("smc911x_reg_write")));
20
smc911x_handle_mac_address(struct eth_device * dev)21 static void smc911x_handle_mac_address(struct eth_device *dev)
22 {
23 unsigned long addrh, addrl;
24 uchar *m = dev->enetaddr;
25
26 addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
27 addrh = m[4] | (m[5] << 8);
28 smc911x_set_mac_csr(dev, ADDRL, addrl);
29 smc911x_set_mac_csr(dev, ADDRH, addrh);
30
31 printf(DRIVERNAME ": MAC %pM\n", m);
32 }
33
smc911x_eth_phy_read(struct eth_device * dev,u8 phy,u8 reg,u16 * val)34 static int smc911x_eth_phy_read(struct eth_device *dev,
35 u8 phy, u8 reg, u16 *val)
36 {
37 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
38 ;
39
40 smc911x_set_mac_csr(dev, MII_ACC, phy << 11 | reg << 6 |
41 MII_ACC_MII_BUSY);
42
43 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
44 ;
45
46 *val = smc911x_get_mac_csr(dev, MII_DATA);
47
48 return 0;
49 }
50
smc911x_eth_phy_write(struct eth_device * dev,u8 phy,u8 reg,u16 val)51 static int smc911x_eth_phy_write(struct eth_device *dev,
52 u8 phy, u8 reg, u16 val)
53 {
54 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
55 ;
56
57 smc911x_set_mac_csr(dev, MII_DATA, val);
58 smc911x_set_mac_csr(dev, MII_ACC,
59 phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
60
61 while (smc911x_get_mac_csr(dev, MII_ACC) & MII_ACC_MII_BUSY)
62 ;
63 return 0;
64 }
65
smc911x_phy_reset(struct eth_device * dev)66 static int smc911x_phy_reset(struct eth_device *dev)
67 {
68 u32 reg;
69
70 reg = smc911x_reg_read(dev, PMT_CTRL);
71 reg &= ~0xfffff030;
72 reg |= PMT_CTRL_PHY_RST;
73 smc911x_reg_write(dev, PMT_CTRL, reg);
74
75 mdelay(100);
76
77 return 0;
78 }
79
smc911x_phy_configure(struct eth_device * dev)80 static void smc911x_phy_configure(struct eth_device *dev)
81 {
82 int timeout;
83 u16 status;
84
85 smc911x_phy_reset(dev);
86
87 smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_RESET);
88 mdelay(1);
89 smc911x_eth_phy_write(dev, 1, MII_ADVERTISE, 0x01e1);
90 smc911x_eth_phy_write(dev, 1, MII_BMCR, BMCR_ANENABLE |
91 BMCR_ANRESTART);
92
93 timeout = 5000;
94 do {
95 mdelay(1);
96 if ((timeout--) == 0)
97 goto err_out;
98
99 if (smc911x_eth_phy_read(dev, 1, MII_BMSR, &status) != 0)
100 goto err_out;
101 } while (!(status & BMSR_LSTATUS));
102
103 printf(DRIVERNAME ": phy initialized\n");
104
105 return;
106
107 err_out:
108 printf(DRIVERNAME ": autonegotiation timed out\n");
109 }
110
smc911x_enable(struct eth_device * dev)111 static void smc911x_enable(struct eth_device *dev)
112 {
113 /* Enable TX */
114 smc911x_reg_write(dev, HW_CFG, 8 << 16 | HW_CFG_SF);
115
116 smc911x_reg_write(dev, GPT_CFG, GPT_CFG_TIMER_EN | 10000);
117
118 smc911x_reg_write(dev, TX_CFG, TX_CFG_TX_ON);
119
120 /* no padding to start of packets */
121 smc911x_reg_write(dev, RX_CFG, 0);
122
123 smc911x_set_mac_csr(dev, MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN |
124 MAC_CR_HBDIS);
125
126 }
127
smc911x_init(struct eth_device * dev,bd_t * bd)128 static int smc911x_init(struct eth_device *dev, bd_t * bd)
129 {
130 struct chip_id *id = dev->priv;
131
132 printf(DRIVERNAME ": detected %s controller\n", id->name);
133
134 smc911x_reset(dev);
135
136 /* Configure the PHY, initialize the link state */
137 smc911x_phy_configure(dev);
138
139 smc911x_handle_mac_address(dev);
140
141 /* Turn on Tx + Rx */
142 smc911x_enable(dev);
143
144 return 0;
145 }
146
smc911x_send(struct eth_device * dev,void * packet,int length)147 static int smc911x_send(struct eth_device *dev, void *packet, int length)
148 {
149 u32 *data = (u32*)packet;
150 u32 tmplen;
151 u32 status;
152
153 smc911x_reg_write(dev, TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG |
154 TX_CMD_A_INT_LAST_SEG | length);
155 smc911x_reg_write(dev, TX_DATA_FIFO, length);
156
157 tmplen = (length + 3) / 4;
158
159 while (tmplen--)
160 pkt_data_push(dev, TX_DATA_FIFO, *data++);
161
162 /* wait for transmission */
163 while (!((smc911x_reg_read(dev, TX_FIFO_INF) &
164 TX_FIFO_INF_TSUSED) >> 16));
165
166 /* get status. Ignore 'no carrier' error, it has no meaning for
167 * full duplex operation
168 */
169 status = smc911x_reg_read(dev, TX_STATUS_FIFO) &
170 (TX_STS_LOC | TX_STS_LATE_COLL | TX_STS_MANY_COLL |
171 TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
172
173 if (!status)
174 return 0;
175
176 printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
177 status & TX_STS_LOC ? "TX_STS_LOC " : "",
178 status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
179 status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
180 status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
181 status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
182
183 return -1;
184 }
185
smc911x_halt(struct eth_device * dev)186 static void smc911x_halt(struct eth_device *dev)
187 {
188 smc911x_reset(dev);
189 smc911x_handle_mac_address(dev);
190 }
191
smc911x_rx(struct eth_device * dev)192 static int smc911x_rx(struct eth_device *dev)
193 {
194 u32 *data = (u32 *)net_rx_packets[0];
195 u32 pktlen, tmplen;
196 u32 status;
197
198 if ((smc911x_reg_read(dev, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED) >> 16) {
199 status = smc911x_reg_read(dev, RX_STATUS_FIFO);
200 pktlen = (status & RX_STS_PKT_LEN) >> 16;
201
202 smc911x_reg_write(dev, RX_CFG, 0);
203
204 tmplen = (pktlen + 3) / 4;
205 while (tmplen--)
206 *data++ = pkt_data_pull(dev, RX_DATA_FIFO);
207
208 if (status & RX_STS_ES)
209 printf(DRIVERNAME
210 ": dropped bad packet. Status: 0x%08x\n",
211 status);
212 else
213 net_process_received_packet(net_rx_packets[0], pktlen);
214 }
215
216 return 0;
217 }
218
219 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
220 /* wrapper for smc911x_eth_phy_read */
smc911x_miiphy_read(struct mii_dev * bus,int phy,int devad,int reg)221 static int smc911x_miiphy_read(struct mii_dev *bus, int phy, int devad,
222 int reg)
223 {
224 u16 val = 0;
225 struct eth_device *dev = eth_get_dev_by_name(bus->name);
226 if (dev) {
227 int retval = smc911x_eth_phy_read(dev, phy, reg, &val);
228 if (retval < 0)
229 return retval;
230 return val;
231 }
232 return -ENODEV;
233 }
234 /* wrapper for smc911x_eth_phy_write */
smc911x_miiphy_write(struct mii_dev * bus,int phy,int devad,int reg,u16 val)235 static int smc911x_miiphy_write(struct mii_dev *bus, int phy, int devad,
236 int reg, u16 val)
237 {
238 struct eth_device *dev = eth_get_dev_by_name(bus->name);
239 if (dev)
240 return smc911x_eth_phy_write(dev, phy, reg, val);
241 return -ENODEV;
242 }
243 #endif
244
smc911x_initialize(u8 dev_num,int base_addr)245 int smc911x_initialize(u8 dev_num, int base_addr)
246 {
247 unsigned long addrl, addrh;
248 struct eth_device *dev;
249
250 dev = malloc(sizeof(*dev));
251 if (!dev) {
252 return -1;
253 }
254 memset(dev, 0, sizeof(*dev));
255
256 dev->iobase = base_addr;
257
258 /* Try to detect chip. Will fail if not present. */
259 if (smc911x_detect_chip(dev)) {
260 free(dev);
261 return 0;
262 }
263
264 addrh = smc911x_get_mac_csr(dev, ADDRH);
265 addrl = smc911x_get_mac_csr(dev, ADDRL);
266 if (!(addrl == 0xffffffff && addrh == 0x0000ffff)) {
267 /* address is obtained from optional eeprom */
268 dev->enetaddr[0] = addrl;
269 dev->enetaddr[1] = addrl >> 8;
270 dev->enetaddr[2] = addrl >> 16;
271 dev->enetaddr[3] = addrl >> 24;
272 dev->enetaddr[4] = addrh;
273 dev->enetaddr[5] = addrh >> 8;
274 }
275
276 dev->init = smc911x_init;
277 dev->halt = smc911x_halt;
278 dev->send = smc911x_send;
279 dev->recv = smc911x_rx;
280 sprintf(dev->name, "%s-%hu", DRIVERNAME, dev_num);
281
282 eth_register(dev);
283
284 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
285 int retval;
286 struct mii_dev *mdiodev = mdio_alloc();
287 if (!mdiodev)
288 return -ENOMEM;
289 strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
290 mdiodev->read = smc911x_miiphy_read;
291 mdiodev->write = smc911x_miiphy_write;
292
293 retval = mdio_register(mdiodev);
294 if (retval < 0)
295 return retval;
296 #endif
297
298 return 1;
299 }
300