1 /* Only eth0 supported for now
2 *
3 * (C) Copyright 2003
4 * Thomas.Lange@corelatus.se
5 *
6 * SPDX-License-Identifier: GPL-2.0+
7 */
8 #include <config.h>
9
10 #if defined(CONFIG_SYS_DISCOVER_PHY)
11 #error "PHY not supported yet"
12 /* We just assume that we are running 100FD for now */
13 /* We all use switches, right? ;-) */
14 #endif
15
16 /* I assume ethernet behaves like au1000 */
17
18 #ifdef CONFIG_SOC_AU1000
19 /* Base address differ between cpu:s */
20 #define ETH0_BASE AU1000_ETH0_BASE
21 #define MAC0_ENABLE AU1000_MAC0_ENABLE
22 #else
23 #ifdef CONFIG_SOC_AU1100
24 #define ETH0_BASE AU1100_ETH0_BASE
25 #define MAC0_ENABLE AU1100_MAC0_ENABLE
26 #else
27 #ifdef CONFIG_SOC_AU1500
28 #define ETH0_BASE AU1500_ETH0_BASE
29 #define MAC0_ENABLE AU1500_MAC0_ENABLE
30 #else
31 #ifdef CONFIG_SOC_AU1550
32 #define ETH0_BASE AU1550_ETH0_BASE
33 #define MAC0_ENABLE AU1550_MAC0_ENABLE
34 #else
35 #error "No valid cpu set"
36 #endif
37 #endif
38 #endif
39 #endif
40
41 #include <common.h>
42 #include <malloc.h>
43 #include <net.h>
44 #include <command.h>
45 #include <asm/io.h>
46 #include <mach/au1x00.h>
47
48 #if defined(CONFIG_CMD_MII)
49 #include <miiphy.h>
50 #endif
51
52 /* Ethernet Transmit and Receive Buffers */
53 #define DBUF_LENGTH 1520
54 #define PKT_MAXBUF_SIZE 1518
55
56 static char txbuf[DBUF_LENGTH];
57
58 static int next_tx;
59 static int next_rx;
60
61 /* 4 rx and 4 tx fifos */
62 #define NO_OF_FIFOS 4
63
64 typedef struct{
65 u32 status;
66 u32 addr;
67 u32 len; /* Only used for tx */
68 u32 not_used;
69 } mac_fifo_t;
70
71 mac_fifo_t mac_fifo[NO_OF_FIFOS];
72
73 #define MAX_WAIT 1000
74
75 #if defined(CONFIG_CMD_MII)
au1x00_miiphy_read(struct mii_dev * bus,int addr,int devad,int reg)76 int au1x00_miiphy_read(struct mii_dev *bus, int addr, int devad, int reg)
77 {
78 unsigned short value = 0;
79 volatile u32 *mii_control_reg = (volatile u32*)(ETH0_BASE+MAC_MII_CNTRL);
80 volatile u32 *mii_data_reg = (volatile u32*)(ETH0_BASE+MAC_MII_DATA);
81 u32 mii_control;
82 unsigned int timedout = 20;
83
84 while (*mii_control_reg & MAC_MII_BUSY) {
85 udelay(1000);
86 if (--timedout == 0) {
87 printf("au1x00_eth: miiphy_read busy timeout!!\n");
88 return -1;
89 }
90 }
91
92 mii_control = MAC_SET_MII_SELECT_REG(reg) |
93 MAC_SET_MII_SELECT_PHY(addr) | MAC_MII_READ;
94
95 *mii_control_reg = mii_control;
96
97 timedout = 20;
98 while (*mii_control_reg & MAC_MII_BUSY) {
99 udelay(1000);
100 if (--timedout == 0) {
101 printf("au1x00_eth: miiphy_read busy timeout!!\n");
102 return -1;
103 }
104 }
105 value = *mii_data_reg;
106 return value;
107 }
108
au1x00_miiphy_write(struct mii_dev * bus,int addr,int devad,int reg,u16 value)109 int au1x00_miiphy_write(struct mii_dev *bus, int addr, int devad, int reg,
110 u16 value)
111 {
112 volatile u32 *mii_control_reg = (volatile u32*)(ETH0_BASE+MAC_MII_CNTRL);
113 volatile u32 *mii_data_reg = (volatile u32*)(ETH0_BASE+MAC_MII_DATA);
114 u32 mii_control;
115 unsigned int timedout = 20;
116
117 while (*mii_control_reg & MAC_MII_BUSY) {
118 udelay(1000);
119 if (--timedout == 0) {
120 printf("au1x00_eth: miiphy_write busy timeout!!\n");
121 return -1;
122 }
123 }
124
125 mii_control = MAC_SET_MII_SELECT_REG(reg) |
126 MAC_SET_MII_SELECT_PHY(addr) | MAC_MII_WRITE;
127
128 *mii_data_reg = value;
129 *mii_control_reg = mii_control;
130 return 0;
131 }
132 #endif
133
au1x00_send(struct eth_device * dev,void * packet,int length)134 static int au1x00_send(struct eth_device *dev, void *packet, int length)
135 {
136 volatile mac_fifo_t *fifo_tx =
137 (volatile mac_fifo_t*)(MAC0_TX_DMA_ADDR+MAC_TX_BUFF0_STATUS);
138 int i;
139 int res;
140
141 /* tx fifo should always be idle */
142 fifo_tx[next_tx].len = length;
143 fifo_tx[next_tx].addr = (virt_to_phys(packet))|TX_DMA_ENABLE;
144 au_sync();
145
146 udelay(1);
147 i=0;
148 while(!(fifo_tx[next_tx].addr&TX_T_DONE)){
149 if(i>MAX_WAIT){
150 printf("TX timeout\n");
151 break;
152 }
153 udelay(1);
154 i++;
155 }
156
157 /* Clear done bit */
158 fifo_tx[next_tx].addr = 0;
159 fifo_tx[next_tx].len = 0;
160 au_sync();
161
162 res = fifo_tx[next_tx].status;
163
164 next_tx++;
165 if(next_tx>=NO_OF_FIFOS){
166 next_tx=0;
167 }
168 return(res);
169 }
170
au1x00_recv(struct eth_device * dev)171 static int au1x00_recv(struct eth_device* dev){
172 volatile mac_fifo_t *fifo_rx =
173 (volatile mac_fifo_t*)(MAC0_RX_DMA_ADDR+MAC_RX_BUFF0_STATUS);
174
175 int length;
176 u32 status;
177
178 for(;;){
179 if(!(fifo_rx[next_rx].addr&RX_T_DONE)){
180 /* Nothing has been received */
181 return(-1);
182 }
183
184 status = fifo_rx[next_rx].status;
185
186 length = status&0x3FFF;
187
188 if(status&RX_ERROR){
189 printf("Rx error 0x%x\n", status);
190 } else {
191 /* Pass the packet up to the protocol layers. */
192 net_process_received_packet(net_rx_packets[next_rx],
193 length - 4);
194 }
195
196 fifo_rx[next_rx].addr =
197 (virt_to_phys(net_rx_packets[next_rx])) | RX_DMA_ENABLE;
198
199 next_rx++;
200 if(next_rx>=NO_OF_FIFOS){
201 next_rx=0;
202 }
203 } /* for */
204
205 return(0); /* Does anyone use this? */
206 }
207
au1x00_init(struct eth_device * dev,bd_t * bd)208 static int au1x00_init(struct eth_device* dev, bd_t * bd){
209
210 volatile u32 *macen = (volatile u32*)MAC0_ENABLE;
211 volatile u32 *mac_ctrl = (volatile u32*)(ETH0_BASE+MAC_CONTROL);
212 volatile u32 *mac_addr_high = (volatile u32*)(ETH0_BASE+MAC_ADDRESS_HIGH);
213 volatile u32 *mac_addr_low = (volatile u32*)(ETH0_BASE+MAC_ADDRESS_LOW);
214 volatile u32 *mac_mcast_high = (volatile u32*)(ETH0_BASE+MAC_MCAST_HIGH);
215 volatile u32 *mac_mcast_low = (volatile u32*)(ETH0_BASE+MAC_MCAST_LOW);
216 volatile mac_fifo_t *fifo_tx =
217 (volatile mac_fifo_t*)(MAC0_TX_DMA_ADDR+MAC_TX_BUFF0_STATUS);
218 volatile mac_fifo_t *fifo_rx =
219 (volatile mac_fifo_t*)(MAC0_RX_DMA_ADDR+MAC_RX_BUFF0_STATUS);
220 int i;
221
222 next_tx = TX_GET_DMA_BUFFER(fifo_tx[0].addr);
223 next_rx = RX_GET_DMA_BUFFER(fifo_rx[0].addr);
224
225 /* We have to enable clocks before releasing reset */
226 *macen = MAC_EN_CLOCK_ENABLE;
227 udelay(10);
228
229 /* Enable MAC0 */
230 /* We have to release reset before accessing registers */
231 *macen = MAC_EN_CLOCK_ENABLE|MAC_EN_RESET0|
232 MAC_EN_RESET1|MAC_EN_RESET2;
233 udelay(10);
234
235 for(i=0;i<NO_OF_FIFOS;i++){
236 fifo_tx[i].len = 0;
237 fifo_tx[i].addr = virt_to_phys(&txbuf[0]);
238 fifo_rx[i].addr = (virt_to_phys(net_rx_packets[i])) |
239 RX_DMA_ENABLE;
240 }
241
242 /* Put mac addr in little endian */
243 #define ea eth_get_ethaddr()
244 *mac_addr_high = (ea[5] << 8) | (ea[4] ) ;
245 *mac_addr_low = (ea[3] << 24) | (ea[2] << 16) |
246 (ea[1] << 8) | (ea[0] ) ;
247 #undef ea
248 *mac_mcast_low = 0;
249 *mac_mcast_high = 0;
250
251 /* Make sure the MAC buffer is in the correct endian mode */
252 #ifdef __LITTLE_ENDIAN
253 *mac_ctrl = MAC_FULL_DUPLEX;
254 udelay(1);
255 *mac_ctrl = MAC_FULL_DUPLEX|MAC_RX_ENABLE|MAC_TX_ENABLE;
256 #else
257 *mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX;
258 udelay(1);
259 *mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX|MAC_RX_ENABLE|MAC_TX_ENABLE;
260 #endif
261
262 return(1);
263 }
264
au1x00_halt(struct eth_device * dev)265 static void au1x00_halt(struct eth_device* dev){
266 volatile u32 *macen = (volatile u32*)MAC0_ENABLE;
267
268 /* Put MAC0 in reset */
269 *macen = 0;
270 }
271
au1x00_enet_initialize(bd_t * bis)272 int au1x00_enet_initialize(bd_t *bis){
273 struct eth_device* dev;
274
275 if ((dev = (struct eth_device*)malloc(sizeof *dev)) == NULL) {
276 puts ("malloc failed\n");
277 return -1;
278 }
279
280 memset(dev, 0, sizeof *dev);
281
282 strcpy(dev->name, "Au1X00 ethernet");
283 dev->iobase = 0;
284 dev->priv = 0;
285 dev->init = au1x00_init;
286 dev->halt = au1x00_halt;
287 dev->send = au1x00_send;
288 dev->recv = au1x00_recv;
289
290 eth_register(dev);
291
292 #if defined(CONFIG_CMD_MII)
293 int retval;
294 struct mii_dev *mdiodev = mdio_alloc();
295 if (!mdiodev)
296 return -ENOMEM;
297 strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
298 mdiodev->read = au1x00_miiphy_read;
299 mdiodev->write = au1x00_miiphy_write;
300
301 retval = mdio_register(mdiodev);
302 if (retval < 0)
303 return retval;
304 #endif
305
306 return 1;
307 }
308
cpu_eth_init(bd_t * bis)309 int cpu_eth_init(bd_t *bis)
310 {
311 au1x00_enet_initialize(bis);
312 return 0;
313 }
314