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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>
97 lines
3 KiB
C
97 lines
3 KiB
C
/* Gaisler.com GRETH 10/100/1000 Ethernet MAC driver
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*
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* (C) Copyright 2007
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* Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#define GRETH_FD 0x10
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#define GRETH_RESET 0x40
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#define GRETH_MII_BUSY 0x8
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#define GRETH_MII_NVALID 0x10
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/* MII registers */
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#define GRETH_MII_EXTADV_1000FD 0x00000200
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#define GRETH_MII_EXTADV_1000HD 0x00000100
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#define GRETH_MII_EXTPRT_1000FD 0x00000800
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#define GRETH_MII_EXTPRT_1000HD 0x00000400
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#define GRETH_MII_100T4 0x00000200
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#define GRETH_MII_100TXFD 0x00000100
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#define GRETH_MII_100TXHD 0x00000080
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#define GRETH_MII_10FD 0x00000040
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#define GRETH_MII_10HD 0x00000020
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#define GRETH_BD_EN 0x800
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#define GRETH_BD_WR 0x1000
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#define GRETH_BD_IE 0x2000
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#define GRETH_BD_LEN 0x7FF
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#define GRETH_TXEN 0x1
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#define GRETH_INT_TX 0x8
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#define GRETH_TXI 0x4
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#define GRETH_TXBD_STATUS 0x0001C000
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#define GRETH_TXBD_MORE 0x20000
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#define GRETH_TXBD_IPCS 0x40000
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#define GRETH_TXBD_TCPCS 0x80000
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#define GRETH_TXBD_UDPCS 0x100000
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#define GRETH_TXBD_ERR_LC 0x10000
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#define GRETH_TXBD_ERR_UE 0x4000
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#define GRETH_TXBD_ERR_AL 0x8000
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#define GRETH_TXBD_NUM 128
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#define GRETH_TXBD_NUM_MASK (GRETH_TXBD_NUM-1)
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#define GRETH_TX_BUF_SIZE 2048
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#define GRETH_INT_RX 0x4
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#define GRETH_RXEN 0x2
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#define GRETH_RXI 0x8
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#define GRETH_RXBD_STATUS 0xFFFFC000
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#define GRETH_RXBD_ERR_AE 0x4000
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#define GRETH_RXBD_ERR_FT 0x8000
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#define GRETH_RXBD_ERR_CRC 0x10000
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#define GRETH_RXBD_ERR_OE 0x20000
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#define GRETH_RXBD_ERR_LE 0x40000
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#define GRETH_RXBD_IP_DEC 0x80000
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#define GRETH_RXBD_IP_CSERR 0x100000
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#define GRETH_RXBD_UDP_DEC 0x200000
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#define GRETH_RXBD_UDP_CSERR 0x400000
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#define GRETH_RXBD_TCP_DEC 0x800000
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#define GRETH_RXBD_TCP_CSERR 0x1000000
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#define GRETH_RXBD_NUM 128
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#define GRETH_RXBD_NUM_MASK (GRETH_RXBD_NUM-1)
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#define GRETH_RX_BUF_SIZE 2048
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/* Ethernet configuration registers */
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typedef struct _greth_regs {
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volatile unsigned int control;
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volatile unsigned int status;
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volatile unsigned int esa_msb;
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volatile unsigned int esa_lsb;
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volatile unsigned int mdio;
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volatile unsigned int tx_desc_p;
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volatile unsigned int rx_desc_p;
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} greth_regs;
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/* Ethernet buffer descriptor */
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typedef struct _greth_bd {
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volatile unsigned int stat;
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unsigned int addr; /* Buffer address not changed by HW */
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} greth_bd;
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