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u-boot/drivers/net/plb2800_eth.c

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/*
* 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>
#include <malloc.h>
#include <net.h>
#include <netdev.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 -1;
}
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 0;
}
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;
}
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