/*
* Cirrus Logic CS8900A Ethernet
*
+ * (C) 2003 Wolfgang Denk, wd@denx.de
+ * Extension to synchronize ethaddr environment variable
+ * against value in EEPROM
+ *
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
#ifdef CONFIG_DRIVER_CS8900
-#if (CONFIG_COMMANDS & CFG_CMD_NET)
+#if defined(CONFIG_CMD_NET)
+#undef DEBUG
/* packet page register access functions */
/* we don't need 16 bit initialisation on 32 bit bus */
#define get_reg_init_bus(x) get_reg((x))
#else
-static unsigned short get_reg_init_bus(int regno)
+static unsigned short get_reg_init_bus (int regno)
{
- /* force 16 bit busmode */
- volatile unsigned char c;
- c = CS8900_BUS16_0;
- c = CS8900_BUS16_1;
- c = CS8900_BUS16_0;
- c = CS8900_BUS16_1;
- c = CS8900_BUS16_0;
-
- CS8900_PPTR = regno;
- return (unsigned short) CS8900_PDATA;
+ /* force 16 bit busmode */
+ volatile unsigned char c;
+
+ c = CS8900_BUS16_0;
+ c = CS8900_BUS16_1;
+ c = CS8900_BUS16_0;
+ c = CS8900_BUS16_1;
+ c = CS8900_BUS16_0;
+
+ CS8900_PPTR = regno;
+ return (unsigned short) CS8900_PDATA;
}
#endif
-static unsigned short
-get_reg(int regno)
+static unsigned short get_reg (int regno)
{
- CS8900_PPTR = regno;
- return (unsigned short) CS8900_PDATA;
+ CS8900_PPTR = regno;
+ return (unsigned short) CS8900_PDATA;
}
-static void put_reg(int regno, unsigned short val)
+static void put_reg (int regno, unsigned short val)
{
- CS8900_PPTR = regno;
- CS8900_PDATA = val;
+ CS8900_PPTR = regno;
+ CS8900_PDATA = val;
}
-static void eth_reset(void)
+static void eth_reset (void)
{
- int tmo;
- unsigned short us;
+ int tmo;
+ unsigned short us;
- /* reset NIC */
- put_reg(PP_SelfCTL, get_reg(PP_SelfCTL) | PP_SelfCTL_Reset );
+ /* reset NIC */
+ put_reg (PP_SelfCTL, get_reg (PP_SelfCTL) | PP_SelfCTL_Reset);
- /* wait for 200ms */
- udelay(200000);
- /* Wait until the chip is reset */
+ /* wait for 200ms */
+ udelay (200000);
+ /* Wait until the chip is reset */
+
+ tmo = get_timer (0) + 1 * CFG_HZ;
+ while ((((us = get_reg_init_bus (PP_SelfSTAT)) & PP_SelfSTAT_InitD) == 0)
+ && tmo < get_timer (0))
+ /*NOP*/;
+}
- tmo = get_timer(0) + 1 * CFG_HZ;
- while ((((us = get_reg_init_bus(PP_SelfSTAT)) & PP_SelfSTAT_InitD) == 0)
- && tmo < get_timer(0))
- /*NOP*/;
+static void eth_reginit (void)
+{
+ /* receive only error free packets addressed to this card */
+ put_reg (PP_RxCTL, PP_RxCTL_IA | PP_RxCTL_Broadcast | PP_RxCTL_RxOK);
+ /* do not generate any interrupts on receive operations */
+ put_reg (PP_RxCFG, 0);
+ /* do not generate any interrupts on transmit operations */
+ put_reg (PP_TxCFG, 0);
+ /* do not generate any interrupts on buffer operations */
+ put_reg (PP_BufCFG, 0);
+ /* enable transmitter/receiver mode */
+ put_reg (PP_LineCTL, PP_LineCTL_Rx | PP_LineCTL_Tx);
}
-void cs8900_get_enetaddr (uchar *addr)
+void cs8900_get_enetaddr (uchar * addr)
{
- int i;
- /* verify chip id */
- if (get_reg_init_bus(PP_ChipID) != 0x630e)
- return;
- eth_reset();
- if ((get_reg(PP_SelfST) & (PP_SelfSTAT_EEPROM | PP_SelfSTAT_EEPROM_OK)) ==
- (PP_SelfSTAT_EEPROM|PP_SelfSTAT_EEPROM_OK)) {
- /* Load the MAC from EEPROM */
- for (i=0; i<6/2; i++) {
- unsigned int Addr;
- Addr = get_reg(PP_IA+i*2);
- addr[i*2] = Addr & 0xFF;
- addr[i*2+1] = Addr >> 8;
+ int i;
+ unsigned char env_enetaddr[6];
+ char *tmp = getenv ("ethaddr");
+ char *end;
+
+ for (i=0; i<6; i++) {
+ env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
+ if (tmp)
+ tmp = (*end) ? end+1 : end;
+ }
+
+ /* verify chip id */
+ if (get_reg_init_bus (PP_ChipID) != 0x630e)
+ return;
+ eth_reset ();
+ if ((get_reg (PP_SelfST) & (PP_SelfSTAT_EEPROM | PP_SelfSTAT_EEPROM_OK)) ==
+ (PP_SelfSTAT_EEPROM | PP_SelfSTAT_EEPROM_OK)) {
+
+ /* Load the MAC from EEPROM */
+ for (i = 0; i < 6 / 2; i++) {
+ unsigned int Addr;
+
+ Addr = get_reg (PP_IA + i * 2);
+ addr[i * 2] = Addr & 0xFF;
+ addr[i * 2 + 1] = Addr >> 8;
+ }
+
+ if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6) != 0 &&
+ memcmp(env_enetaddr, addr, 6) != 0) {
+ printf ("\nWarning: MAC addresses don't match:\n");
+ printf ("\tHW MAC address: "
+ "%02X:%02X:%02X:%02X:%02X:%02X\n",
+ addr[0], addr[1],
+ addr[2], addr[3],
+ addr[4], addr[5] );
+ printf ("\t\"ethaddr\" value: "
+ "%02X:%02X:%02X:%02X:%02X:%02X\n",
+ env_enetaddr[0], env_enetaddr[1],
+ env_enetaddr[2], env_enetaddr[3],
+ env_enetaddr[4], env_enetaddr[5]) ;
+ debug ("### Set MAC addr from environment\n");
+ memcpy (addr, env_enetaddr, 6);
+ }
+ if (!tmp) {
+ char ethaddr[20];
+ sprintf (ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X",
+ addr[0], addr[1],
+ addr[2], addr[3],
+ addr[4], addr[5]) ;
+ debug ("### Set environment from HW MAC addr = \"%s\"\n", ethaddr);
+ setenv ("ethaddr", ethaddr);
+ }
+
}
- }
}
-void eth_halt( void )
+void eth_halt (void)
{
- /* disable transmitter/receiver mode */
- put_reg(PP_LineCTL, 0);
+ /* disable transmitter/receiver mode */
+ put_reg (PP_LineCTL, 0);
- /* "shutdown" to show ChipID or kernel wouldn't find he cs8900 ... */
- get_reg_init_bus(PP_ChipID);
+ /* "shutdown" to show ChipID or kernel wouldn't find he cs8900 ... */
+ get_reg_init_bus (PP_ChipID);
}
-int eth_init( bd_t *bd )
+int eth_init (bd_t * bd)
{
- /* verify chip id */
- if (get_reg_init_bus(PP_ChipID) != 0x630e)
- {
- printf( "CS8900 Ethernet chip not found?!\n" );
+ /* verify chip id */
+ if (get_reg_init_bus (PP_ChipID) != 0x630e) {
+ printf ("CS8900 Ethernet chip not found?!\n");
+ return 0;
+ }
+
+ eth_reset ();
+ /* set the ethernet address */
+ put_reg (PP_IA + 0, bd->bi_enetaddr[0] | (bd->bi_enetaddr[1] << 8));
+ put_reg (PP_IA + 2, bd->bi_enetaddr[2] | (bd->bi_enetaddr[3] << 8));
+ put_reg (PP_IA + 4, bd->bi_enetaddr[4] | (bd->bi_enetaddr[5] << 8));
+
+ eth_reginit ();
return 0;
- }
+}
- eth_reset();
- /* set the ethernet address */
- put_reg(PP_IA + 0, bd->bi_enetaddr[0] | (bd->bi_enetaddr[1] << 8));
- put_reg(PP_IA + 2, bd->bi_enetaddr[2] | (bd->bi_enetaddr[3] << 8));
- put_reg(PP_IA + 4, bd->bi_enetaddr[4] | (bd->bi_enetaddr[5] << 8));
+/* Get a data block via Ethernet */
+extern int eth_rx (void)
+{
+ int i;
+ unsigned short rxlen;
+ unsigned short *addr;
+ unsigned short status;
- /* receive only error free packets addressed to this card */
- put_reg(PP_RxCTL, PP_RxCTL_IA | PP_RxCTL_Broadcast | PP_RxCTL_RxOK);
+ status = get_reg (PP_RER);
- /* do not generate any interrupts on receive operations */
- put_reg(PP_RxCFG, 0);
+ if ((status & PP_RER_RxOK) == 0)
+ return 0;
- /* do not generate any interrupts on transmit operations */
- put_reg(PP_TxCFG, 0);
+ status = CS8900_RTDATA; /* stat */
+ rxlen = CS8900_RTDATA; /* len */
- /* do not generate any interrupts on buffer operations */
- put_reg(PP_BufCFG, 0);
+#ifdef DEBUG
+ if (rxlen > PKTSIZE_ALIGN + PKTALIGN)
+ printf ("packet too big!\n");
+#endif
+ for (addr = (unsigned short *) NetRxPackets[0], i = rxlen >> 1; i > 0;
+ i--)
+ *addr++ = CS8900_RTDATA;
+ if (rxlen & 1)
+ *addr++ = CS8900_RTDATA;
- /* enable transmitter/receiver mode */
- put_reg(PP_LineCTL, PP_LineCTL_Rx | PP_LineCTL_Tx);
+ /* Pass the packet up to the protocol layers. */
+ NetReceive (NetRxPackets[0], rxlen);
- return 0;
+ return rxlen;
}
-/* Get a data block via Ethernet */
-extern int eth_rx(void)
+/* Send a data block via Ethernet. */
+extern int eth_send (volatile void *packet, int length)
{
- int i;
- unsigned short rxlen;
- unsigned short *addr;
- unsigned short status;
+ volatile unsigned short *addr;
+ int tmo;
+ unsigned short s;
- status = get_reg(PP_RER);
+retry:
+ /* initiate a transmit sequence */
+ CS8900_TxCMD = PP_TxCmd_TxStart_Full;
+ CS8900_TxLEN = length;
+
+ /* Test to see if the chip has allocated memory for the packet */
+ if ((get_reg (PP_BusSTAT) & PP_BusSTAT_TxRDY) == 0) {
+ /* Oops... this should not happen! */
+#ifdef DEBUG
+ printf ("cs: unable to send packet; retrying...\n");
+#endif
+ for (tmo = get_timer (0) + 5 * CFG_HZ; get_timer (0) < tmo;)
+ /*NOP*/;
+ eth_reset ();
+ eth_reginit ();
+ goto retry;
+ }
- if ((status & PP_RER_RxOK) == 0)
- return 0;
+ /* Write the contents of the packet */
+ /* assume even number of bytes */
+ for (addr = packet; length > 0; length -= 2)
+ CS8900_RTDATA = *addr++;
- status = CS8900_RTDATA; /* stat */
- rxlen = CS8900_RTDATA; /* len */
+ /* wait for transfer to succeed */
+ tmo = get_timer (0) + 5 * CFG_HZ;
+ while ((s = get_reg (PP_TER) & ~0x1F) == 0) {
+ if (get_timer (0) >= tmo)
+ break;
+ }
+
+ /* nothing */ ;
+ if ((s & (PP_TER_CRS | PP_TER_TxOK)) != PP_TER_TxOK) {
+#ifdef DEBUG
+ printf ("\ntransmission error %#x\n", s);
+#endif
+ }
+
+ return 0;
+}
- if(rxlen > PKTSIZE_ALIGN + PKTALIGN)
- printf("packet too big!\n");
+static void cs8900_e2prom_ready(void)
+{
+ while(get_reg(PP_SelfST) & SI_BUSY);
+}
- for(addr = (unsigned short *)NetRxPackets[0], i = rxlen >> 1; i > 0; i-- )
- *addr++ = CS8900_RTDATA;
- if(rxlen & 1)
- *addr++ = CS8900_RTDATA;
+/***********************************************************/
+/* read a 16-bit word out of the EEPROM */
+/***********************************************************/
- /* Pass the packet up to the protocol layers. */
- NetReceive(NetRxPackets[0], rxlen);
+int cs8900_e2prom_read(unsigned char addr, unsigned short *value)
+{
+ cs8900_e2prom_ready();
+ put_reg(PP_EECMD, EEPROM_READ_CMD | addr);
+ cs8900_e2prom_ready();
+ *value = get_reg(PP_EEData);
- return rxlen;
+ return 0;
}
-/* Send a data block via Ethernet. */
-extern int eth_send(volatile void *packet, int length)
+
+/***********************************************************/
+/* write a 16-bit word into the EEPROM */
+/***********************************************************/
+
+int cs8900_e2prom_write(unsigned char addr, unsigned short value)
{
- volatile unsigned short *addr;
- int tmo;
- unsigned short s;
+ cs8900_e2prom_ready();
+ put_reg(PP_EECMD, EEPROM_WRITE_EN);
+ cs8900_e2prom_ready();
+ put_reg(PP_EEData, value);
+ put_reg(PP_EECMD, EEPROM_WRITE_CMD | addr);
+ cs8900_e2prom_ready();
+ put_reg(PP_EECMD, EEPROM_WRITE_DIS);
+ cs8900_e2prom_ready();
-retry:
- /* initiate a transmit sequence */
- CS8900_TxCMD = PP_TxCmd_TxStart_Full;
- CS8900_TxLEN = length;
-
- /* Test to see if the chip has allocated memory for the packet */
- if ((get_reg(PP_BusSTAT) & PP_BusSTAT_TxRDY) == 0) {
- /* Oops... this should not happen! */
- printf("cs: unable to send packet; retrying...\n");
- for (tmo = get_timer(0) + 5 * CFG_HZ; get_timer(0) < tmo; )
- /*NOP*/;
- eth_reset();
- goto retry;
- }
-
- /* Write the contents of the packet */
- /* assume even number of bytes */
- for(addr = packet; length > 0; length -= 2 )
- CS8900_RTDATA = *addr++;
-
- /* wait for transfer to succeed */
- tmo = get_timer(0) + 5 * CFG_HZ;
- while((s = get_reg(PP_TER) & ~0x1F) == 0)
- {
- if (get_timer(0) >= tmo)
- break;
- }
-
- /* nothing */ ;
- if ((s & (PP_TER_CRS | PP_TER_TxOK)) != PP_TER_TxOK) {
- printf("\ntransmission error %#x\n", s);
- }
-
- return 0;
+ return 0;
}
-#endif /* COMMANDS & CFG_NET */
+#endif /* COMMANDS & CFG_NET */
-#endif /* CONFIG_DRIVER_CS8900 */
+#endif /* CONFIG_DRIVER_CS8900 */
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