* Patch by Greg Ungerer, 19 May 2005:

  add support for the KS8695P (ARM 922 based) CPU

* Patch by Steven Scholz, 19 May 2005:
  Add support for CONFIG_SERIAL_TAG on ARM boards

1 files changed, 236 insertions, 0 deletions

diff --git a/drivers/ks8695eth.c b/drivers/ks8695eth.c
new file mode 100644
index 0000000..89c766b
--- /dev/null
+++ b/drivers/ks8695eth.c
@@ -0,0 +1,236 @@
+/*
+ * ks8695eth.c -- KS8695 ethernet driver
+ *
+ * (C) Copyright 2004-2005, Greg Ungerer <greg.ungerer@opengear.com>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/****************************************************************************/
+
+#include <common.h>
+#include <malloc.h>
+#include <net.h>
+#include <asm/io.h>
+#include <asm/arch/platform.h>
+
+/****************************************************************************/
+
+/*
+ * Hardware register access to the KS8695 LAN ethernet port
+ * (well, it is the 4 port switch really).
+ */
+#define	ks8695_read(a)    *((volatile unsigned long *) (KS8695_IO_BASE + (a)))
+#define	ks8695_write(a,v) *((volatile unsigned long *) (KS8695_IO_BASE + (a))) = (v)
+
+/****************************************************************************/
+
+/*
+ * Define the descriptor in-memory data structures.
+ */
+struct ks8695_txdesc {
+	uint32_t	owner;
+	uint32_t	ctrl;
+	uint32_t	addr;
+	uint32_t	next;
+};
+
+struct ks8695_rxdesc {
+	uint32_t	status;
+	uint32_t	ctrl;
+	uint32_t	addr;
+	uint32_t	next;
+};
+
+/****************************************************************************/
+
+/*
+ * Allocate local data structures to use for receiving and sending
+ * packets. Just to keep it all nice and simple.
+ */
+
+#define	TXDESCS		4
+#define	RXDESCS		4
+#define	BUFSIZE		2048
+
+volatile struct ks8695_txdesc ks8695_tx[TXDESCS] __attribute__((aligned(256)));
+volatile struct ks8695_rxdesc ks8695_rx[RXDESCS] __attribute__((aligned(256)));
+volatile uint8_t ks8695_bufs[BUFSIZE*(TXDESCS+RXDESCS)] __attribute__((aligned(2048)));;
+
+/****************************************************************************/
+
+/*
+ *	Ideally we want to use the MAC address stored in flash.
+ *	But we do some sanity checks in case they are not present
+ *	first.
+ */
+unsigned char eth_mac[] = {
+	0x00, 0x13, 0xc6, 0x00, 0x00, 0x00
+};
+
+void ks8695_getmac(void)
+{
+	unsigned char *fp;
+	int i;
+
+	/* Check if flash MAC is valid */
+	fp = (unsigned char *) 0x0201c000;
+	for (i = 0; (i < 6); i++) {
+		if ((fp[i] != 0) && (fp[i] != 0xff))
+			break;
+	}
+
+	/* If we found a valid looking MAC address then use it */
+	if (i < 6)
+		memcpy(&eth_mac[0], fp, 6);
+}
+
+/****************************************************************************/
+
+void eth_reset(bd_t *bd)
+{
+	int i;
+
+	debug ("%s(%d): eth_reset()\n", __FILE__, __LINE__);
+
+	/* Reset the ethernet engines first */
+	ks8695_write(KS8695_LAN_DMA_TX, 0x80000000);
+	ks8695_write(KS8695_LAN_DMA_RX, 0x80000000);
+
+	ks8695_getmac();
+
+	/* Set MAC address */
+	ks8695_write(KS8695_LAN_MAC_LOW, (eth_mac[5] | (eth_mac[4] << 8) |
+		(eth_mac[3] << 16) | (eth_mac[2] << 24)));
+	ks8695_write(KS8695_LAN_MAC_HIGH, (eth_mac[1] | (eth_mac[0] << 8)));
+
+	/* Turn the 4 port switch on */
+	i = ks8695_read(KS8695_SWITCH_CTRL0);
+	ks8695_write(KS8695_SWITCH_CTRL0, (i | 0x1));
+	/* ks8695_write(KS8695_WAN_CONTROL, 0x3f000066); */
+
+	/* Initialize descriptor rings */
+	for (i = 0; (i < TXDESCS); i++) {
+		ks8695_tx[i].owner = 0;
+		ks8695_tx[i].ctrl = 0;
+		ks8695_tx[i].addr = (uint32_t) &ks8695_bufs[i*BUFSIZE];
+		ks8695_tx[i].next = (uint32_t) &ks8695_tx[i+1];
+	}
+	ks8695_tx[TXDESCS-1].ctrl = 0x02000000;
+	ks8695_tx[TXDESCS-1].next = (uint32_t) &ks8695_tx[0];
+
+	for (i = 0; (i < RXDESCS); i++) {
+		ks8695_rx[i].status = 0x80000000;
+		ks8695_rx[i].ctrl = BUFSIZE - 4;
+		ks8695_rx[i].addr = (uint32_t) &ks8695_bufs[(i+TXDESCS)*BUFSIZE];
+		ks8695_rx[i].next = (uint32_t) &ks8695_rx[i+1];
+	}
+	ks8695_rx[RXDESCS-1].ctrl |= 0x00080000;
+	ks8695_rx[RXDESCS-1].next = (uint32_t) &ks8695_rx[0];
+
+	/* The KS8695 is pretty slow reseting the ethernets... */
+	udelay(2000000);
+
+	/* Enable the ethernet engine */
+	ks8695_write(KS8695_LAN_TX_LIST, (uint32_t) &ks8695_tx[0]);
+	ks8695_write(KS8695_LAN_RX_LIST, (uint32_t) &ks8695_rx[0]);
+	ks8695_write(KS8695_LAN_DMA_TX, 0x3);
+	ks8695_write(KS8695_LAN_DMA_RX, 0x71);
+	ks8695_write(KS8695_LAN_DMA_RX_START, 0x1);
+
+	printf("KS8695 ETHERNET: ");
+	for (i = 0; (i < 5); i++) {
+		bd->bi_enetaddr[i] = eth_mac[i];
+		printf("%02x:", eth_mac[i]);
+	}
+	bd->bi_enetaddr[i] = eth_mac[i];
+	printf("%02x\n", eth_mac[i]);
+}
+
+/****************************************************************************/
+
+int eth_init(bd_t *bd)
+{
+	debug ("%s(%d): eth_init()\n", __FILE__, __LINE__);
+
+	eth_reset(bd);
+	return 0;
+}
+
+/****************************************************************************/
+
+void eth_halt(void)
+{
+	debug ("%s(%d): eth_halt()\n", __FILE__, __LINE__);
+
+	/* Reset the ethernet engines */
+	ks8695_write(KS8695_LAN_DMA_TX, 0x80000000);
+	ks8695_write(KS8695_LAN_DMA_RX, 0x80000000);
+}
+
+/****************************************************************************/
+
+int eth_rx(void)
+{
+	volatile struct ks8695_rxdesc *dp;
+	int i, len = 0;
+
+	debug ("%s(%d): eth_rx()\n", __FILE__, __LINE__);
+
+	for (i = 0; (i < RXDESCS); i++) {
+		dp= &ks8695_rx[i];
+		if ((dp->status & 0x80000000) == 0) {
+			len = (dp->status & 0x7ff) - 4;
+			NetReceive((void *) dp->addr, len);
+			dp->status = 0x80000000;
+			ks8695_write(KS8695_LAN_DMA_RX_START, 0x1);
+			break;
+		}
+	}
+
+	return len;
+}
+
+/****************************************************************************/
+
+int eth_send(volatile void *packet, int len)
+{
+	volatile struct ks8695_txdesc *dp;
+	static int next = 0;
+
+	debug ("%s(%d): eth_send(packet=%x,len=%d)\n", __FILE__, __LINE__,
+		packet, len);
+
+	dp = &ks8695_tx[next];
+	memcpy((void *) dp->addr, packet, len);
+
+	if (len < 64) {
+		memset(dp->addr+len, 0, 64-len);
+		len = 64;
+	}
+
+	dp->ctrl = len | 0xe0000000;
+	dp->owner = 0x80000000;
+
+	ks8695_write(KS8695_LAN_DMA_TX, 0x3);
+	ks8695_write(KS8695_LAN_DMA_TX_START, 0x1);
+
+	if (++next >= TXDESCS)
+		next = 0;
+
+	return len;
+}
+
+/****************************************************************************/