Merge with git://www.denx.de/git/u-boot.git

1 files changed, 396 insertions, 0 deletions

diff --git a/drivers/net/plb2800_eth.c b/drivers/net/plb2800_eth.c
new file mode 100644
index 0000000..0ae5d80
--- /dev/null
+++ b/drivers/net/plb2800_eth.c
@@ -0,0 +1,396 @@
+/*
+ * PLB2800 internal switch ethernet driver.
+ *
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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>
+
+#if defined(CONFIG_CMD_NET) \
+	&& defined(CONFIG_NET_MULTI) && defined(CONFIG_PLB2800_ETHER)
+
+#include <malloc.h>
+#include <net.h>
+#include <asm/addrspace.h>
+
+
+#define NUM_RX_DESC	PKTBUFSRX
+#define TOUT_LOOP	1000000
+
+#define LONG_REF(addr) (*((volatile unsigned long*)addr))
+
+#define CMAC_CRX_CTRL	LONG_REF(0xb800c870)
+#define CMAC_CTX_CTRL	LONG_REF(0xb800c874)
+#define SYS_MAC_ADDR_0	LONG_REF(0xb800c878)
+#define SYS_MAC_ADDR_1	LONG_REF(0xb800c87c)
+#define MIPS_H_MASK	LONG_REF(0xB800C810)
+
+#define MA_LEARN	LONG_REF(0xb8008004)
+#define DA_LOOKUP	LONG_REF(0xb8008008)
+
+#define CMAC_CRX_CTRL_PD	0x00000001
+#define CMAC_CRX_CTRL_CG	0x00000002
+#define CMAC_CRX_CTRL_PL_SHIFT	2
+#define CMAC_CRIT		0x0
+#define CMAC_NON_CRIT		0x1
+#define MBOX_STAT_ID_SHF	28
+#define MBOX_STAT_CP		0x80000000
+#define MBOX_STAT_MB		0x00000001
+#define EN_MA_LEARN		0x02000000
+#define EN_DA_LKUP		0x01000000
+#define MA_DEST_SHF		11
+#define DA_DEST_SHF		11
+#define DA_STATE_SHF		19
+#define TSTAMP_MS		0x00000000
+#define SW_H_MBOX4_MASK		0x08000000
+#define SW_H_MBOX3_MASK		0x04000000
+#define SW_H_MBOX2_MASK		0x02000000
+#define SW_H_MBOX1_MASK		0x01000000
+
+typedef volatile struct {
+  unsigned int stat;
+  unsigned int cmd;
+  unsigned int cnt;
+  unsigned int adr;
+} mailbox_t;
+
+#define MBOX_REG(mb) ((mailbox_t*)(0xb800c830+(mb<<4)))
+
+typedef volatile struct {
+  unsigned int word0;
+  unsigned int word1;
+  unsigned int word2;
+} mbhdr_t;
+
+#define MBOX_MEM(mb) ((void*)(0xb800a000+((3-mb)<<11)))
+
+
+static int plb2800_eth_init(struct eth_device *dev, bd_t * bis);
+static int plb2800_eth_send(struct eth_device *dev, volatile void *packet,
+						  int length);
+static int plb2800_eth_recv(struct eth_device *dev);
+static void plb2800_eth_halt(struct eth_device *dev);
+
+static void plb2800_set_mac_addr(struct eth_device *dev, unsigned char * addr);
+static unsigned char * plb2800_get_mac_addr(void);
+
+static int rx_new;
+static int mac_addr_set = 0;
+
+
+int plb2800_eth_initialize(bd_t * bis)
+{
+	struct eth_device *dev;
+	ulong temp;
+
+#ifdef DEBUG
+	printf("Entered plb2800_eth_initialize()\n");
+#endif
+
+	if (!(dev = (struct eth_device *) malloc (sizeof *dev)))
+	{
+		printf("Failed to allocate memory\n");
+		return 0;
+	}
+	memset(dev, 0, sizeof(*dev));
+
+	sprintf(dev->name, "PLB2800 Switch");
+	dev->init = plb2800_eth_init;
+	dev->halt = plb2800_eth_halt;
+	dev->send = plb2800_eth_send;
+	dev->recv = plb2800_eth_recv;
+
+	eth_register(dev);
+
+	/* bug fix */
+	*(ulong *)0xb800e800 = 0x838;
+
+	/* Set MBOX ownership */
+	temp = CMAC_CRIT << MBOX_STAT_ID_SHF;
+	MBOX_REG(0)->stat = temp;
+	MBOX_REG(1)->stat = temp;
+
+	temp = CMAC_NON_CRIT << MBOX_STAT_ID_SHF;
+	MBOX_REG(2)->stat = temp;
+	MBOX_REG(3)->stat = temp;
+
+	plb2800_set_mac_addr(dev, plb2800_get_mac_addr());
+
+	/* Disable all Mbox interrupt */
+	temp = MIPS_H_MASK;
+	temp &= ~ (SW_H_MBOX1_MASK | SW_H_MBOX2_MASK | SW_H_MBOX3_MASK | SW_H_MBOX4_MASK) ;
+	MIPS_H_MASK = temp;
+
+#ifdef DEBUG
+	printf("Leaving plb2800_eth_initialize()\n");
+#endif
+
+	return 1;
+}
+
+static int plb2800_eth_init(struct eth_device *dev, bd_t * bis)
+{
+#ifdef DEBUG
+	printf("Entering plb2800_eth_init()\n");
+#endif
+
+	plb2800_set_mac_addr(dev, dev->enetaddr);
+
+	rx_new = 0;
+
+#ifdef DEBUG
+	printf("Leaving plb2800_eth_init()\n");
+#endif
+
+	return 0;
+}
+
+
+static int plb2800_eth_send(struct eth_device *dev, volatile void *packet,
+						  int length)
+{
+	int                    i;
+	int                    res         = -1;
+	u32                    temp;
+	mailbox_t *            mb          = MBOX_REG(0);
+	char      *            mem         = MBOX_MEM(0);
+
+#ifdef DEBUG
+	printf("Entered plb2800_eth_send()\n");
+#endif
+
+	if (length <= 0)
+	{
+		printf ("%s: bad packet size: %d\n", dev->name, length);
+		goto Done;
+	}
+
+	if (length < 64)
+	{
+		length = 64;
+	}
+
+	temp = CMAC_CRX_CTRL_CG | ((length + 4) << CMAC_CRX_CTRL_PL_SHIFT);
+
+#ifdef DEBUG
+	printf("0 mb->stat = 0x%x\n",  mb->stat);
+#endif
+
+	for(i = 0; mb->stat & (MBOX_STAT_CP | MBOX_STAT_MB); i++)
+	{
+		if (i >= TOUT_LOOP)
+		{
+			printf("%s: tx buffer not ready\n", dev->name);
+			printf("1 mb->stat = 0x%x\n",  mb->stat);
+			goto Done;
+		}
+	}
+
+		/* For some strange reason, memcpy doesn't work, here!
+		 */
+	do
+	{
+		int words = (length >> 2) + 1;
+		unsigned int* dst = (unsigned int*)(mem);
+		unsigned int* src = (unsigned int*)(packet);
+		for (i = 0; i < words; i++)
+		{
+			*dst = *src;
+			dst++;
+			src++;
+		};
+	} while(0);
+
+	CMAC_CRX_CTRL = temp;
+	mb->cmd = MBOX_STAT_CP;
+
+#ifdef DEBUG
+	printf("2 mb->stat = 0x%x\n",  mb->stat);
+#endif
+
+	res = length;
+Done:
+
+#ifdef DEBUG
+	printf("Leaving plb2800_eth_send()\n");
+#endif
+
+	return res;
+}
+
+
+static int plb2800_eth_recv(struct eth_device *dev)
+{
+	int                    length  = 0;
+	mailbox_t            * mbox    = MBOX_REG(3);
+	unsigned char        * hdr     = MBOX_MEM(3);
+	unsigned int           stat;
+
+#ifdef DEBUG
+	printf("Entered plb2800_eth_recv()\n");
+#endif
+
+	for (;;)
+	{
+		stat = mbox->stat;
+
+		if (!(stat & MBOX_STAT_CP))
+		{
+			break;
+		}
+
+		length = ((*(hdr + 6) & 0x3f) << 8) + *(hdr + 7);
+		memcpy((void *)NetRxPackets[rx_new], hdr + 12, length);
+
+		stat &= ~MBOX_STAT_CP;
+		mbox->stat = stat;
+#ifdef DEBUG
+		{
+			int i;
+			for (i=0;i<length - 4;i++)
+			{
+				if (i % 16 == 0) printf("\n%04x: ", i);
+				printf("%02X ", NetRxPackets[rx_new][i]);
+			}
+			printf("\n");
+		}
+#endif
+
+		if (length)
+		{
+#ifdef DEBUG
+			printf("Received %d bytes\n", length);
+#endif
+			NetReceive((void*)(NetRxPackets[rx_new]),
+			            length - 4);
+		}
+		else
+		{
+#if 1
+			printf("Zero length!!!\n");
+#endif
+		}
+
+		rx_new = (rx_new + 1) % NUM_RX_DESC;
+	}
+
+#ifdef DEBUG
+	printf("Leaving plb2800_eth_recv()\n");
+#endif
+
+	return length;
+}
+
+
+static void plb2800_eth_halt(struct eth_device *dev)
+{
+#ifdef DEBUG
+	printf("Entered plb2800_eth_halt()\n");
+#endif
+
+#ifdef DEBUG
+	printf("Leaving plb2800_eth_halt()\n");
+#endif
+}
+
+static void plb2800_set_mac_addr(struct eth_device *dev, unsigned char * addr)
+{
+	char packet[60];
+	ulong temp;
+	int ix;
+
+	if (mac_addr_set ||
+	    NULL == addr || memcmp(addr, "\0\0\0\0\0\0", 6) == 0)
+	{
+		return;
+	}
+
+	/* send one packet through CPU port
+	 * in order to learn system MAC address
+	 */
+
+	/* Set DA_LOOKUP register */
+	temp = EN_MA_LEARN | (0 << DA_STATE_SHF) | (63 << DA_DEST_SHF);
+	DA_LOOKUP = temp;
+
+	/* Set MA_LEARN register */
+	temp = 50 << MA_DEST_SHF; 	/* static entry */
+	MA_LEARN = temp;
+
+	/* set destination address */
+	for (ix=0;ix<6;ix++)
+		packet[ix] = 0xff;
+
+	/* set source address = system MAC address */
+	for (ix=0;ix<6;ix++)
+		packet[6+ix] = addr[ix];
+
+	/* set type field */
+	packet[12]=0xaa;
+	packet[13]=0x55;
+
+	/* set data field */
+	for(ix=14;ix<60;ix++)
+		packet[ix] = 0x00;
+
+#ifdef DEBUG
+	for (ix=0;ix<6;ix++)
+		printf("mac_addr[%d]=%02X\n", ix, (unsigned char)packet[6+ix]);
+#endif
+
+	/* set one packet */
+	plb2800_eth_send(dev, packet, sizeof(packet));
+
+	/* delay for a while */
+	for(ix=0;ix<65535;ix++)
+		temp = ~temp;
+
+	/* Set CMAC_CTX_CTRL register */
+	temp = TSTAMP_MS;	/* no autocast */
+	CMAC_CTX_CTRL = temp;
+
+	/* Set DA_LOOKUP register */
+	temp = EN_DA_LKUP;
+	DA_LOOKUP = temp;
+
+	mac_addr_set = 1;
+}
+
+static unsigned char * plb2800_get_mac_addr(void)
+{
+	static unsigned char addr[6];
+	char *tmp, *end;
+	int i;
+
+	tmp = getenv ("ethaddr");
+	if (NULL == tmp) return NULL;
+
+	for (i=0; i<6; i++) {
+		addr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
+		if (tmp)
+			tmp = (*end) ? end+1 : end;
+	}
+
+	return addr;
+}
+
+#endif /* CONFIG_PLB2800_ETHER */