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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