]> git.sur5r.net Git - u-boot/commitdiff
SPARC/LEON3: Added GRETH Ethernet 10/100/1000 driver.
authorDaniel Hellstrom <daniel@gaisler.com>
Fri, 28 Mar 2008 19:22:53 +0000 (20:22 +0100)
committerBen Warren <biggerbadderben@gmail.com>
Sun, 30 Mar 2008 04:33:28 +0000 (00:33 -0400)
GRETH is an Ethernet 10/100 or 10/100/1000 MAC with out without
a debug link (EDCL). The GRETH core is documented in GRIP.pdf
available at www.gaisler.com.

If the GRETH has GigaBit support (GBIT, Scatter gather, checksum
offloading etc.) can be determined by a bit in the control register.
The GBIT MAC is supported by operating in GRTEH 10/100 legacy mode.

Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
drivers/net/Makefile
drivers/net/greth.c [new file with mode: 0644]
drivers/net/greth.h [new file with mode: 0644]
net/eth.c

index 320dc3ebac716adb4bfd9b699f9d19d6972f3710..eafd2670075029034ffb9a59e6df792fa8a96b5c 100644 (file)
@@ -35,6 +35,7 @@ COBJS-y += e1000.o
 COBJS-y += eepro100.o
 COBJS-y += enc28j60.o
 COBJS-y += fsl_mcdmafec.o
+COBJS-$(CONFIG_GRETH) += greth.o
 COBJS-y += inca-ip_sw.o
 COBJS-y += ks8695eth.o
 COBJS-y += lan91c96.o
diff --git a/drivers/net/greth.c b/drivers/net/greth.c
new file mode 100644 (file)
index 0000000..76ece59
--- /dev/null
@@ -0,0 +1,661 @@
+/* Gaisler.com GRETH 10/100/1000 Ethernet MAC driver
+ *
+ * Driver use polling mode (no Interrupt)
+ *
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
+ *
+ * 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 <command.h>
+#include <net.h>
+#include <malloc.h>
+#include <asm/processor.h>
+#include <ambapp.h>
+#include <asm/leon.h>
+
+/* #define DEBUG */
+
+#include "greth.h"
+
+/* Default to 3s timeout on autonegotiation */
+#ifndef GRETH_PHY_TIMEOUT_MS
+#define GRETH_PHY_TIMEOUT_MS 3000
+#endif
+
+/* ByPass Cache when reading regs */
+#define GRETH_REGLOAD(addr)            SPARC_NOCACHE_READ(addr)
+/* Write-through cache ==> no bypassing needed on writes */
+#define GRETH_REGSAVE(addr,data)       (*(unsigned int *)(addr) = (data))
+#define GRETH_REGORIN(addr,data) GRETH_REGSAVE(addr,GRETH_REGLOAD(addr)|data)
+#define GRETH_REGANDIN(addr,data) GRETH_REGSAVE(addr,GRETH_REGLOAD(addr)&data)
+
+#define GRETH_RXBD_CNT 4
+#define GRETH_TXBD_CNT 1
+
+#define GRETH_RXBUF_SIZE 1540
+#define GRETH_BUF_ALIGN 4
+#define GRETH_RXBUF_EFF_SIZE \
+       ( (GRETH_RXBUF_SIZE&~(GRETH_BUF_ALIGN-1))+GRETH_BUF_ALIGN )
+
+typedef struct {
+       greth_regs *regs;
+       int irq;
+       struct eth_device *dev;
+
+       /* Hardware info */
+       unsigned char phyaddr;
+       int gbit_mac;
+
+       /* Current operating Mode */
+       int gb;                 /* GigaBit */
+       int fd;                 /* Full Duplex */
+       int sp;                 /* 10/100Mbps speed (1=100,0=10) */
+       int auto_neg;           /* Auto negotiate done */
+
+       unsigned char hwaddr[6];        /* MAC Address */
+
+       /* Descriptors */
+       greth_bd *rxbd_base, *rxbd_max;
+       greth_bd *txbd_base, *txbd_max;
+
+       greth_bd *rxbd_curr;
+
+       /* rx buffers in rx descriptors */
+       void *rxbuf_base;       /* (GRETH_RXBUF_SIZE+ALIGNBYTES) * GRETH_RXBD_CNT */
+
+       /* unused for gbit_mac, temp buffer for sending packets with unligned
+        * start.
+        * Pointer to packet allocated with malloc.
+        */
+       void *txbuf;
+
+       struct {
+               /* rx status */
+               unsigned int rx_packets,
+                   rx_crc_errors, rx_frame_errors, rx_length_errors, rx_errors;
+
+               /* tx stats */
+               unsigned int tx_packets,
+                   tx_latecol_errors,
+                   tx_underrun_errors, tx_limit_errors, tx_errors;
+       } stats;
+} greth_priv;
+
+/* Read MII register 'addr' from core 'regs' */
+static int read_mii(int addr, volatile greth_regs * regs)
+{
+       while (GRETH_REGLOAD(&regs->mdio) & GRETH_MII_BUSY) {
+       }
+
+       GRETH_REGSAVE(&regs->mdio, (0 << 11) | ((addr & 0x1F) << 6) | 2);
+
+       while (GRETH_REGLOAD(&regs->mdio) & GRETH_MII_BUSY) {
+       }
+
+       if (!(GRETH_REGLOAD(&regs->mdio) & GRETH_MII_NVALID)) {
+               return (GRETH_REGLOAD(&regs->mdio) >> 16) & 0xFFFF;
+       } else {
+               return -1;
+       }
+}
+
+static void write_mii(int addr, int data, volatile greth_regs * regs)
+{
+       while (GRETH_REGLOAD(&regs->mdio) & GRETH_MII_BUSY) {
+       }
+
+       GRETH_REGSAVE(&regs->mdio,
+                     ((data & 0xFFFF) << 16) | (0 << 11) | ((addr & 0x1F) << 6)
+                     | 1);
+
+       while (GRETH_REGLOAD(&regs->mdio) & GRETH_MII_BUSY) {
+       }
+
+}
+
+/* init/start hardware and allocate descriptor buffers for rx side
+ *
+ */
+int greth_init(struct eth_device *dev, bd_t * bis)
+{
+       int i;
+
+       greth_priv *greth = dev->priv;
+       greth_regs *regs = greth->regs;
+#ifdef DEBUG
+       printf("greth_init\n");
+#endif
+
+       GRETH_REGSAVE(&regs->control, 0);
+
+       if (!greth->rxbd_base) {
+
+               /* allocate descriptors */
+               greth->rxbd_base = (greth_bd *)
+                   memalign(0x1000, GRETH_RXBD_CNT * sizeof(greth_bd));
+               greth->txbd_base = (greth_bd *)
+                   memalign(0x1000, GRETH_RXBD_CNT * sizeof(greth_bd));
+
+               /* allocate buffers to all descriptors  */
+               greth->rxbuf_base =
+                   malloc(GRETH_RXBUF_EFF_SIZE * GRETH_RXBD_CNT);
+       }
+
+       /* initate rx decriptors */
+       for (i = 0; i < GRETH_RXBD_CNT; i++) {
+               greth->rxbd_base[i].addr = (unsigned int)
+                   greth->rxbuf_base + (GRETH_RXBUF_EFF_SIZE * i);
+               /* enable desciptor & set wrap bit if last descriptor */
+               if (i >= (GRETH_RXBD_CNT - 1)) {
+                       greth->rxbd_base[i].stat = GRETH_BD_EN | GRETH_BD_WR;
+               } else {
+                       greth->rxbd_base[i].stat = GRETH_BD_EN;
+               }
+       }
+
+       /* initiate indexes */
+       greth->rxbd_curr = greth->rxbd_base;
+       greth->rxbd_max = greth->rxbd_base + (GRETH_RXBD_CNT - 1);
+       greth->txbd_max = greth->txbd_base + (GRETH_TXBD_CNT - 1);
+       /*
+        * greth->txbd_base->addr = 0;
+        * greth->txbd_base->stat = GRETH_BD_WR;
+        */
+
+       /* initate tx decriptors */
+       for (i = 0; i < GRETH_TXBD_CNT; i++) {
+               greth->txbd_base[i].addr = 0;
+               /* enable desciptor & set wrap bit if last descriptor */
+               if (i >= (GRETH_RXBD_CNT - 1)) {
+                       greth->txbd_base[i].stat = GRETH_BD_WR;
+               } else {
+                       greth->txbd_base[i].stat = 0;
+               }
+       }
+
+       /**** SET HARDWARE REGS ****/
+
+       /* Set pointer to tx/rx descriptor areas */
+       GRETH_REGSAVE(&regs->rx_desc_p, (unsigned int)&greth->rxbd_base[0]);
+       GRETH_REGSAVE(&regs->tx_desc_p, (unsigned int)&greth->txbd_base[0]);
+
+       /* Enable Transmitter, GRETH will now scan descriptors for packets
+        * to transmitt */
+#ifdef DEBUG
+       printf("greth_init: enabling receiver\n");
+#endif
+       GRETH_REGORIN(&regs->control, GRETH_RXEN);
+
+       return 0;
+}
+
+/* Initiate PHY to a relevant speed
+ * return:
+ *  - 0 = success
+ *  - 1 = timeout/fail
+ */
+int greth_init_phy(greth_priv * dev, bd_t * bis)
+{
+       greth_regs *regs = dev->regs;
+       int tmp, tmp1, tmp2, i;
+       unsigned int start, timeout;
+
+       /* X msecs to ticks */
+       timeout = usec2ticks(GRETH_PHY_TIMEOUT_MS * 1000);
+
+       /* Get system timer0 current value
+        * Total timeout is 5s
+        */
+       start = get_timer(0);
+
+       /* get phy control register default values */
+
+       while ((tmp = read_mii(0, regs)) & 0x8000) {
+               if (get_timer(start) > timeout)
+                       return 1;       /* Fail */
+       }
+
+       /* reset PHY and wait for completion */
+       write_mii(0, 0x8000 | tmp, regs);
+
+       while (((tmp = read_mii(0, regs))) & 0x8000) {
+               if (get_timer(start) > timeout)
+                       return 1;       /* Fail */
+       }
+
+       /* Check if PHY is autoneg capable and then determine operating
+        * mode, otherwise force it to 10 Mbit halfduplex
+        */
+       dev->gb = 0;
+       dev->fd = 0;
+       dev->sp = 0;
+       dev->auto_neg = 0;
+       if (!((tmp >> 12) & 1)) {
+               write_mii(0, 0, regs);
+       } else {
+               /* wait for auto negotiation to complete and then check operating mode */
+               dev->auto_neg = 1;
+               i = 0;
+               while (!(((tmp = read_mii(1, regs)) >> 5) & 1)) {
+                       if (get_timer(start) > timeout) {
+                               printf("Auto negotiation timed out. "
+                                      "Selecting default config\n");
+                               tmp = read_mii(0, regs);
+                               dev->gb = ((tmp >> 6) & 1)
+                                   && !((tmp >> 13) & 1);
+                               dev->sp = !((tmp >> 6) & 1)
+                                   && ((tmp >> 13) & 1);
+                               dev->fd = (tmp >> 8) & 1;
+                               goto auto_neg_done;
+                       }
+               }
+               if ((tmp >> 8) & 1) {
+                       tmp1 = read_mii(9, regs);
+                       tmp2 = read_mii(10, regs);
+                       if ((tmp1 & GRETH_MII_EXTADV_1000FD) &&
+                           (tmp2 & GRETH_MII_EXTPRT_1000FD)) {
+                               dev->gb = 1;
+                               dev->fd = 1;
+                       }
+                       if ((tmp1 & GRETH_MII_EXTADV_1000HD) &&
+                           (tmp2 & GRETH_MII_EXTPRT_1000HD)) {
+                               dev->gb = 1;
+                               dev->fd = 0;
+                       }
+               }
+               if ((dev->gb == 0) || ((dev->gb == 1) && (dev->gbit_mac == 0))) {
+                       tmp1 = read_mii(4, regs);
+                       tmp2 = read_mii(5, regs);
+                       if ((tmp1 & GRETH_MII_100TXFD) &&
+                           (tmp2 & GRETH_MII_100TXFD)) {
+                               dev->sp = 1;
+                               dev->fd = 1;
+                       }
+                       if ((tmp1 & GRETH_MII_100TXHD) &&
+                           (tmp2 & GRETH_MII_100TXHD)) {
+                               dev->sp = 1;
+                               dev->fd = 0;
+                       }
+                       if ((tmp1 & GRETH_MII_10FD) && (tmp2 & GRETH_MII_10FD)) {
+                               dev->fd = 1;
+                       }
+                       if ((dev->gb == 1) && (dev->gbit_mac == 0)) {
+                               dev->gb = 0;
+                               dev->fd = 0;
+                               write_mii(0, dev->sp << 13, regs);
+                       }
+               }
+
+       }
+      auto_neg_done:
+#ifdef DEBUG
+       printf("%s GRETH Ethermac at [0x%x] irq %d. Running \
+               %d Mbps %s duplex\n", dev->gbit_mac ? "10/100/1000" : "10/100", (unsigned int)(regs), (unsigned int)(dev->irq), dev->gb ? 1000 : (dev->sp ? 100 : 10), dev->fd ? "full" : "half");
+#endif
+       /* Read out PHY info if extended registers are available */
+       if (tmp & 1) {
+               tmp1 = read_mii(2, regs);
+               tmp2 = read_mii(3, regs);
+               tmp1 = (tmp1 << 6) | ((tmp2 >> 10) & 0x3F);
+               tmp = tmp2 & 0xF;
+
+               tmp2 = (tmp2 >> 4) & 0x3F;
+#ifdef DEBUG
+               printf("PHY: Vendor %x   Device %x    Revision %d\n", tmp1,
+                      tmp2, tmp);
+#endif
+       } else {
+               printf("PHY info not available\n");
+       }
+
+       /* set speed and duplex bits in control register */
+       GRETH_REGORIN(&regs->control,
+                     (dev->gb << 8) | (dev->sp << 7) | (dev->fd << 4));
+
+       return 0;
+}
+
+void greth_halt(struct eth_device *dev)
+{
+       greth_priv *greth;
+       greth_regs *regs;
+       int i;
+#ifdef DEBUG
+       printf("greth_halt\n");
+#endif
+       if (!dev || !dev->priv)
+               return;
+
+       greth = dev->priv;
+       regs = greth->regs;
+
+       if (!regs)
+               return;
+
+       /* disable receiver/transmitter by clearing the enable bits */
+       GRETH_REGANDIN(&regs->control, ~(GRETH_RXEN | GRETH_TXEN));
+
+       /* reset rx/tx descriptors */
+       if (greth->rxbd_base) {
+               for (i = 0; i < GRETH_RXBD_CNT; i++) {
+                       greth->rxbd_base[i].stat =
+                           (i >= (GRETH_RXBD_CNT - 1)) ? GRETH_BD_WR : 0;
+               }
+       }
+
+       if (greth->txbd_base) {
+               for (i = 0; i < GRETH_TXBD_CNT; i++) {
+                       greth->txbd_base[i].stat =
+                           (i >= (GRETH_TXBD_CNT - 1)) ? GRETH_BD_WR : 0;
+               }
+       }
+}
+
+int greth_send(struct eth_device *dev, volatile void *eth_data, int data_length)
+{
+       greth_priv *greth = dev->priv;
+       greth_regs *regs = greth->regs;
+       greth_bd *txbd;
+       void *txbuf;
+       unsigned int status;
+#ifdef DEBUG
+       printf("greth_send\n");
+#endif
+       /* send data, wait for data to be sent, then return */
+       if (((unsigned int)eth_data & (GRETH_BUF_ALIGN - 1))
+           && !greth->gbit_mac) {
+               /* data not aligned as needed by GRETH 10/100, solve this by allocating 4 byte aligned buffer
+                * and copy data to before giving it to GRETH.
+                */
+               if (!greth->txbuf) {
+                       greth->txbuf = malloc(GRETH_RXBUF_SIZE);
+#ifdef DEBUG
+                       printf("GRETH: allocated aligned tx-buf\n");
+#endif
+               }
+
+               txbuf = greth->txbuf;
+
+               /* copy data info buffer */
+               memcpy((char *)txbuf, (char *)eth_data, data_length);
+
+               /* keep buffer to next time */
+       } else {
+               txbuf = (void *)eth_data;
+       }
+       /* get descriptor to use, only 1 supported... hehe easy */
+       txbd = greth->txbd_base;
+
+       /* setup descriptor to wrap around to it self */
+       txbd->addr = (unsigned int)txbuf;
+       txbd->stat = GRETH_BD_EN | GRETH_BD_WR | data_length;
+
+       /* Remind Core which descriptor to use when sending */
+       GRETH_REGSAVE(&regs->tx_desc_p, (unsigned int)txbd);
+
+       /* initate send by enabling transmitter */
+       GRETH_REGORIN(&regs->control, GRETH_TXEN);
+
+       /* Wait for data to be sent */
+       while ((status = GRETH_REGLOAD(&txbd->stat)) & GRETH_BD_EN) {
+               ;
+       }
+
+       /* was the packet transmitted succesfully? */
+       if (status & GRETH_TXBD_ERR_AL) {
+               greth->stats.tx_limit_errors++;
+       }
+
+       if (status & GRETH_TXBD_ERR_UE) {
+               greth->stats.tx_underrun_errors++;
+       }
+
+       if (status & GRETH_TXBD_ERR_LC) {
+               greth->stats.tx_latecol_errors++;
+       }
+
+       if (status &
+           (GRETH_TXBD_ERR_LC | GRETH_TXBD_ERR_UE | GRETH_TXBD_ERR_AL)) {
+               /* any error */
+               greth->stats.tx_errors++;
+               return -1;
+       }
+
+       /* bump tx packet counter */
+       greth->stats.tx_packets++;
+
+       /* return succefully */
+       return 0;
+}
+
+int greth_recv(struct eth_device *dev)
+{
+       greth_priv *greth = dev->priv;
+       greth_regs *regs = greth->regs;
+       greth_bd *rxbd;
+       unsigned int status, len = 0, bad;
+       unsigned char *d;
+       int enable = 0;
+       int i;
+#ifdef DEBUG
+/*     printf("greth_recv\n"); */
+#endif
+       /* Receive One packet only, but clear as many error packets as there are
+        * available.
+        */
+       {
+               /* current receive descriptor */
+               rxbd = greth->rxbd_curr;
+
+               /* get status of next received packet */
+               status = GRETH_REGLOAD(&rxbd->stat);
+
+               bad = 0;
+
+               /* stop if no more packets received */
+               if (status & GRETH_BD_EN) {
+                       goto done;
+               }
+#ifdef DEBUG
+               printf("greth_recv: packet 0x%lx, 0x%lx, len: %d\n",
+                      (unsigned int)rxbd, status, status & GRETH_BD_LEN);
+#endif
+
+               /* Check status for errors.
+                */
+               if (status & GRETH_RXBD_ERR_FT) {
+                       greth->stats.rx_length_errors++;
+                       bad = 1;
+               }
+               if (status & (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE)) {
+                       greth->stats.rx_frame_errors++;
+                       bad = 1;
+               }
+               if (status & GRETH_RXBD_ERR_CRC) {
+                       greth->stats.rx_crc_errors++;
+                       bad = 1;
+               }
+               if (bad) {
+                       greth->stats.rx_errors++;
+                       printf
+                           ("greth_recv: Bad packet (%d, %d, %d, 0x%08x, %d)\n",
+                            greth->stats.rx_length_errors,
+                            greth->stats.rx_frame_errors,
+                            greth->stats.rx_crc_errors, status,
+                            greth->stats.rx_packets);
+                       /* print all rx descriptors */
+                       for (i = 0; i < GRETH_RXBD_CNT; i++) {
+                               printf("[%d]: Stat=0x%lx, Addr=0x%lx\n", i,
+                                      GRETH_REGLOAD(&greth->rxbd_base[i].stat),
+                                      GRETH_REGLOAD(&greth->rxbd_base[i].
+                                                    addr));
+                       }
+               } else {
+                       /* Process the incoming packet. */
+                       len = status & GRETH_BD_LEN;
+                       d = (char *)rxbd->addr;
+#ifdef DEBUG
+                       printf
+                           ("greth_recv: new packet, length: %d. data: %x %x %x %x %x %x %x %x\n",
+                            len, d[0], d[1], d[2], d[3], d[4], d[5], d[6],
+                            d[7]);
+#endif
+                       /* flush all data cache to make sure we're not reading old packet data */
+                       sparc_dcache_flush_all();
+
+                       /* pass packet on to network subsystem */
+                       NetReceive((void *)d, len);
+
+                       /* bump stats counters */
+                       greth->stats.rx_packets++;
+
+                       /* bad is now 0 ==> will stop loop */
+               }
+
+               /* reenable descriptor to receive more packet with this descriptor, wrap around if needed */
+               rxbd->stat =
+                   GRETH_BD_EN |
+                   (((unsigned int)greth->rxbd_curr >=
+                     (unsigned int)greth->rxbd_max) ? GRETH_BD_WR : 0);
+               enable = 1;
+
+               /* increase index */
+               greth->rxbd_curr =
+                   ((unsigned int)greth->rxbd_curr >=
+                    (unsigned int)greth->rxbd_max) ? greth->
+                   rxbd_base : (greth->rxbd_curr + 1);
+
+       };
+
+       if (enable) {
+               GRETH_REGORIN(&regs->control, GRETH_RXEN);
+       }
+      done:
+       /* return positive length of packet or 0 if non recieved */
+       return len;
+}
+
+void greth_set_hwaddr(greth_priv * greth, unsigned char *mac)
+{
+       /* save new MAC address */
+       greth->dev->enetaddr[0] = greth->hwaddr[0] = mac[0];
+       greth->dev->enetaddr[1] = greth->hwaddr[1] = mac[1];
+       greth->dev->enetaddr[2] = greth->hwaddr[2] = mac[2];
+       greth->dev->enetaddr[3] = greth->hwaddr[3] = mac[3];
+       greth->dev->enetaddr[4] = greth->hwaddr[4] = mac[4];
+       greth->dev->enetaddr[5] = greth->hwaddr[5] = mac[5];
+       greth->regs->esa_msb = (mac[0] << 8) | mac[1];
+       greth->regs->esa_lsb =
+           (mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5];
+#ifdef DEBUG
+       printf("GRETH: New MAC address: %02x:%02x:%02x:%02x:%02x:%02x\n",
+              mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+#endif
+}
+
+int greth_initialize(bd_t * bis)
+{
+       greth_priv *greth;
+       ambapp_apbdev apbdev;
+       struct eth_device *dev;
+       int i;
+       char *addr_str, *end;
+       unsigned char addr[6];
+#ifdef DEBUG
+       printf("Scanning for GRETH\n");
+#endif
+       /* Find Device & IRQ via AMBA Plug&Play information */
+       if (ambapp_apb_first(VENDOR_GAISLER, GAISLER_ETHMAC, &apbdev) != 1) {
+               return -1;      /* GRETH not found */
+       }
+
+       greth = (greth_priv *) malloc(sizeof(greth_priv));
+       dev = (struct eth_device *)malloc(sizeof(struct eth_device));
+       memset(dev, 0, sizeof(struct eth_device));
+       memset(greth, 0, sizeof(greth_priv));
+
+       greth->regs = (greth_regs *) apbdev.address;
+       greth->irq = apbdev.irq;
+#ifdef DEBUG
+       printf("Found GRETH at 0x%lx, irq %d\n", greth->regs, greth->irq);
+#endif
+       dev->priv = (void *)greth;
+       dev->iobase = (unsigned int)greth->regs;
+       dev->init = greth_init;
+       dev->halt = greth_halt;
+       dev->send = greth_send;
+       dev->recv = greth_recv;
+       greth->dev = dev;
+
+       /* Reset Core */
+       GRETH_REGSAVE(&greth->regs->control, GRETH_RESET);
+
+       /* Wait for core to finish reset cycle */
+       while (GRETH_REGLOAD(&greth->regs->control) & GRETH_RESET) ;
+
+       /* Get the phy address which assumed to have been set
+          correctly with the reset value in hardware */
+       greth->phyaddr = (GRETH_REGLOAD(&greth->regs->mdio) >> 11) & 0x1F;
+
+       /* Check if mac is gigabit capable */
+       greth->gbit_mac = (GRETH_REGLOAD(&greth->regs->control) >> 27) & 1;
+
+       /* Make descriptor string */
+       if (greth->gbit_mac) {
+               sprintf(dev->name, "GRETH 10/100/GB");
+       } else {
+               sprintf(dev->name, "GRETH 10/100");
+       }
+
+       /* initiate PHY, select speed/duplex depending on connected PHY */
+       if (greth_init_phy(greth, bis)) {
+               /* Failed to init PHY (timedout) */
+               return -1;
+       }
+
+       /* Register Device to EtherNet subsystem  */
+       eth_register(dev);
+
+       /* Get MAC address */
+       if ((addr_str = getenv("ethaddr")) != NULL) {
+               for (i = 0; i < 6; i++) {
+                       addr[i] =
+                           addr_str ? simple_strtoul(addr_str, &end, 16) : 0;
+                       if (addr_str) {
+                               addr_str = (*end) ? end + 1 : end;
+                       }
+               }
+       } else {
+               /* HW Address not found in environment, Set default HW address */
+               addr[0] = GRETH_HWADDR_0;       /* MSB */
+               addr[1] = GRETH_HWADDR_1;
+               addr[2] = GRETH_HWADDR_2;
+               addr[3] = GRETH_HWADDR_3;
+               addr[4] = GRETH_HWADDR_4;
+               addr[5] = GRETH_HWADDR_5;       /* LSB */
+       }
+
+       /* set and remember MAC address */
+       greth_set_hwaddr(greth, addr);
+
+       return 1;
+}
diff --git a/drivers/net/greth.h b/drivers/net/greth.h
new file mode 100644 (file)
index 0000000..7d5fbd3
--- /dev/null
@@ -0,0 +1,97 @@
+/* Gaisler.com GRETH 10/100/1000 Ethernet MAC driver
+ *
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
+ *
+ * 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
+ */
+
+#define GRETH_FD 0x10
+#define GRETH_RESET 0x40
+#define GRETH_MII_BUSY 0x8
+#define GRETH_MII_NVALID 0x10
+
+/* MII registers */
+#define GRETH_MII_EXTADV_1000FD 0x00000200
+#define GRETH_MII_EXTADV_1000HD 0x00000100
+#define GRETH_MII_EXTPRT_1000FD 0x00000800
+#define GRETH_MII_EXTPRT_1000HD 0x00000400
+
+#define GRETH_MII_100T4 0x00000200
+#define GRETH_MII_100TXFD 0x00000100
+#define GRETH_MII_100TXHD 0x00000080
+#define GRETH_MII_10FD 0x00000040
+#define GRETH_MII_10HD 0x00000020
+
+#define GRETH_BD_EN 0x800
+#define GRETH_BD_WR 0x1000
+#define GRETH_BD_IE 0x2000
+#define GRETH_BD_LEN 0x7FF
+
+#define GRETH_TXEN 0x1
+#define GRETH_INT_TX 0x8
+#define GRETH_TXI 0x4
+#define GRETH_TXBD_STATUS 0x0001C000
+#define GRETH_TXBD_MORE 0x20000
+#define GRETH_TXBD_IPCS 0x40000
+#define GRETH_TXBD_TCPCS 0x80000
+#define GRETH_TXBD_UDPCS 0x100000
+#define GRETH_TXBD_ERR_LC 0x10000
+#define GRETH_TXBD_ERR_UE 0x4000
+#define GRETH_TXBD_ERR_AL 0x8000
+#define GRETH_TXBD_NUM 128
+#define GRETH_TXBD_NUM_MASK (GRETH_TXBD_NUM-1)
+#define GRETH_TX_BUF_SIZE 2048
+
+#define GRETH_INT_RX         0x4
+#define GRETH_RXEN           0x2
+#define GRETH_RXI            0x8
+#define GRETH_RXBD_STATUS    0xFFFFC000
+#define GRETH_RXBD_ERR_AE    0x4000
+#define GRETH_RXBD_ERR_FT    0x8000
+#define GRETH_RXBD_ERR_CRC   0x10000
+#define GRETH_RXBD_ERR_OE    0x20000
+#define GRETH_RXBD_ERR_LE    0x40000
+#define GRETH_RXBD_IP_DEC    0x80000
+#define GRETH_RXBD_IP_CSERR  0x100000
+#define GRETH_RXBD_UDP_DEC   0x200000
+#define GRETH_RXBD_UDP_CSERR 0x400000
+#define GRETH_RXBD_TCP_DEC   0x800000
+#define GRETH_RXBD_TCP_CSERR 0x1000000
+
+#define GRETH_RXBD_NUM 128
+#define GRETH_RXBD_NUM_MASK (GRETH_RXBD_NUM-1)
+#define GRETH_RX_BUF_SIZE 2048
+
+/* Ethernet configuration registers */
+typedef struct _greth_regs {
+       volatile unsigned int control;
+       volatile unsigned int status;
+       volatile unsigned int esa_msb;
+       volatile unsigned int esa_lsb;
+       volatile unsigned int mdio;
+       volatile unsigned int tx_desc_p;
+       volatile unsigned int rx_desc_p;
+} greth_regs;
+
+/* Ethernet buffer descriptor */
+typedef struct _greth_bd {
+       volatile unsigned int stat;
+       unsigned int addr;      /* Buffer address not changed by HW */
+} greth_bd;
index 16a6dcbd8ca1dc09847ab0391550282c29d81e7b..3b86f879d260a01469d44bce78fc028931b8bf16 100644 (file)
--- a/net/eth.c
+++ b/net/eth.c
@@ -60,6 +60,7 @@ extern int npe_initialize(bd_t *);
 extern int uec_initialize(int);
 extern int bfin_EMAC_initialize(bd_t *);
 extern int atstk1000_eth_initialize(bd_t *);
+extern int greth_initialize(bd_t *);
 extern int atngw100_eth_initialize(bd_t *);
 extern int mcffec_initialize(bd_t*);
 extern int mcdmafec_initialize(bd_t*);
@@ -275,6 +276,9 @@ int eth_initialize(bd_t *bis)
 #if defined(CONFIG_ATSTK1000)
        atstk1000_eth_initialize(bis);
 #endif
+#if defined(CONFIG_GRETH)
+       greth_initialize(bis);
+#endif
 #if defined(CONFIG_ATNGW100)
        atngw100_eth_initialize(bis);
 #endif