Merge commit '87ddedd'

1 files changed, 322 insertions, 0 deletions

diff --git a/drivers/net/cs8900.c b/drivers/net/cs8900.c
new file mode 100644
index 0000000..80c4ba2
--- /dev/null
+++ b/drivers/net/cs8900.c
@@ -0,0 +1,322 @@
+/*
+ * 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>
+ *
+ * Copyright (C) 1999 Ben Williamson <benw@pobox.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is loaded into SRAM in bootstrap mode, where it waits
+ * for commands on UART1 to read and write memory, jump to code etc.
+ * A design goal for this program is to be entirely independent of the
+ * target board.  Anything with a CL-PS7111 or EP7211 should be able to run
+ * this code in bootstrap mode.  All the board specifics can be handled on
+ * the host.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <common.h>
+#include <command.h>
+#include "cs8900.h"
+#include <net.h>
+
+#ifdef CONFIG_DRIVER_CS8900
+
+#if defined(CONFIG_CMD_NET)
+
+#undef DEBUG
+
+/* packet page register access functions */
+
+#ifdef CS8900_BUS32
+/* 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)
+{
+	/* 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)
+{
+	CS8900_PPTR = regno;
+	return (unsigned short) CS8900_PDATA;
+}
+
+
+static void put_reg (int regno, unsigned short val)
+{
+	CS8900_PPTR = regno;
+	CS8900_PDATA = val;
+}
+
+static void eth_reset (void)
+{
+	int tmo;
+	unsigned short us;
+
+	/* reset NIC */
+	put_reg (PP_SelfCTL, get_reg (PP_SelfCTL) | PP_SelfCTL_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*/;
+}
+
+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)
+{
+	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)
+{
+	/* 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);
+}
+
+int eth_init (bd_t * bd)
+{
+
+	/* 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;
+}
+
+/* Get a data block via Ethernet */
+extern int eth_rx (void)
+{
+	int i;
+	unsigned short rxlen;
+	unsigned short *addr;
+	unsigned short status;
+
+	status = get_reg (PP_RER);
+
+	if ((status & PP_RER_RxOK) == 0)
+		return 0;
+
+	status = CS8900_RTDATA;		/* stat */
+	rxlen = CS8900_RTDATA;		/* len */
+
+#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;
+
+	/* Pass the packet up to the protocol layers. */
+	NetReceive (NetRxPackets[0], rxlen);
+
+	return rxlen;
+}
+
+/* Send a data block via Ethernet. */
+extern int eth_send (volatile void *packet, int length)
+{
+	volatile unsigned short *addr;
+	int tmo;
+	unsigned short s;
+
+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;
+	}
+
+	/* 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) {
+#ifdef DEBUG
+		printf ("\ntransmission error %#x\n", s);
+#endif
+	}
+
+	return 0;
+}
+
+static void cs8900_e2prom_ready(void)
+{
+	while(get_reg(PP_SelfST) & SI_BUSY);
+}
+
+/***********************************************************/
+/* read a 16-bit word out of the EEPROM                    */
+/***********************************************************/
+
+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 0;
+}
+
+
+/***********************************************************/
+/* write a 16-bit word into the EEPROM                     */
+/***********************************************************/
+
+int cs8900_e2prom_write(unsigned char addr, unsigned short value)
+{
+	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();
+
+	return 0;
+}
+
+#endif	/* COMMANDS & CFG_NET */
+
+#endif	/* CONFIG_DRIVER_CS8900 */