| /* |
| * 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(ð_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: %pM\n", eth_mac); |
| } |
| |
| /****************************************************************************/ |
| |
| 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, (void *) packet, len); |
| |
| if (len < 64) { |
| memset((void *) (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; |
| } |