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-rw-r--r--drivers/plb2800_eth.c396
1 files changed, 396 insertions, 0 deletions
diff --git a/drivers/plb2800_eth.c b/drivers/plb2800_eth.c
new file mode 100644
index 0000000..7c7f9f8
--- /dev/null
+++ b/drivers/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 (CONFIG_COMMANDS & CFG_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 */
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