diff options
author | wdenk <wdenk> | 2004-02-23 19:30:57 (GMT) |
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committer | wdenk <wdenk> | 2004-02-23 19:30:57 (GMT) |
commit | 2d1a537d87727907bf4d888760cba4abc0b52ad3 (patch) | |
tree | 29deb37d04cc84308f57ec4274bea7efad743536 /drivers/netarm_eth.c | |
parent | 3f85ce27858c44ee75d3650a53154ebcec0e24f2 (diff) | |
download | u-boot-2d1a537d87727907bf4d888760cba4abc0b52ad3.tar.xz |
* Patch by Thomas Elste, 10 Feb 2004:
Add support for NET+50 CPU and ModNET50 board
* Patch by Sam Song, 10 Feb 2004:
Fix typos in cfi_flash.c
* Patch by Leon Kukovec, 10 Feb 2004
Fixed long dir entry slot id calculation in get_vfatname
* Patch by Robin Gilks, 10 Feb 2004:
add "itest" command (operators: -eq, -ne, -lt, -gt, -le, -ge, ==,
!=, <>, <, >, <=, >=)
Diffstat (limited to 'drivers/netarm_eth.c')
-rw-r--r-- | drivers/netarm_eth.c | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/drivers/netarm_eth.c b/drivers/netarm_eth.c new file mode 100644 index 0000000..a15b653 --- /dev/null +++ b/drivers/netarm_eth.c @@ -0,0 +1,359 @@ +/* + * Copyright (C) 2004 IMMS gGmbH <www.imms.de> + * + * 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 + * + * author(s): Thomas Elste, <info@elste.org> + * (some parts derived from uCLinux Netarm Ethernet Driver) + */ + + +#include <common.h> +#include <command.h> +#include <net.h> +#include "netarm_eth.h" +#include <asm/arch/netarm_registers.h> + +#ifdef CONFIG_DRIVER_NETARMETH + +#if (CONFIG_COMMANDS & CFG_CMD_NET) + +static int na_mii_poll_busy (void); + +static void na_get_mac_addr (void) +{ + unsigned short p[3]; + char *m_addr; + char ethaddr[20]; + + m_addr = (char *) p; + + p[0] = (unsigned short) GET_EADDR (NETARM_ETH_SAL_STATION_ADDR_1); + p[1] = (unsigned short) GET_EADDR (NETARM_ETH_SAL_STATION_ADDR_2); + p[2] = (unsigned short) GET_EADDR (NETARM_ETH_SAL_STATION_ADDR_3); + + sprintf (ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X", + m_addr[0], m_addr[1], + m_addr[2], m_addr[3], m_addr[4], m_addr[5]); + + printf ("HW-MAC Address: %s\n", ethaddr); + + /* set env, todo: check if already an adress is set */ + setenv ("ethaddr", ethaddr); +} + + +static void na_mii_write (int reg, int value) +{ + int mii_addr; + + /* Select register */ + mii_addr = CFG_ETH_PHY_ADDR + reg; + SET_EADDR (NETARM_ETH_MII_ADDR, mii_addr); + /* Write value */ + SET_EADDR (NETARM_ETH_MII_WRITE, value); + na_mii_poll_busy (); +} + +static unsigned int na_mii_read (int reg) +{ + int mii_addr, val; + + /* Select register */ + mii_addr = CFG_ETH_PHY_ADDR + reg; + SET_EADDR (NETARM_ETH_MII_ADDR, mii_addr); + /* do one management cycle */ + SET_EADDR (NETARM_ETH_MII_CMD, + GET_EADDR (NETARM_ETH_MII_CMD) | NETARM_ETH_MIIC_RSTAT); + na_mii_poll_busy (); + /* Return read value */ + val = GET_EADDR (NETARM_ETH_MII_READ); + return val; +} + +static int na_mii_poll_busy (void) +{ + /* arm simple, non interrupt dependent timer */ + reset_timer_masked (); + while (get_timer_masked () < NA_MII_POLL_BUSY_DELAY) { + if (!(GET_EADDR (NETARM_ETH_MII_IND) & NETARM_ETH_MIII_BUSY)) { + return 1; + } + } + printf ("na_mii_busy timeout\n"); + return (0); +} + +static int na_mii_identify_phy (void) +{ + int id_reg_a = 0; + + /* get phy id register */ + id_reg_a = na_mii_read (MII_PHY_ID); + + if (id_reg_a == 0x0043) { + /* This must be an Enable or a Lucent LU3X31 PHY chip */ + return 1; + } else if (id_reg_a == 0x0013) { + /* it is an Intel LXT971A */ + return 1; + } + return (0); +} + +static int na_mii_negotiate (void) +{ + int i = 0; + + /* Enable auto-negotiation */ + na_mii_write (MII_PHY_AUTONEGADV, 0x01e1); + /* FIXME: 0x01E1 is 100Mb half and full duplex, 0x0061 is 10Mb only */ + /* Restart auto-negotiation */ + na_mii_write (MII_PHY_CONTROL, 0x1200); + + /* status register is 0xffff after setting the autoneg restart bit */ + while (na_mii_read (MII_PHY_STATUS) == 0xffff) { + i++; + } + + /* na_mii_read uses the timer already, so we can't use it again for + timeout checking. + Instead we just try some times. + */ + for (i = 0; i < 40000; i++) { + if ((na_mii_read (MII_PHY_STATUS) & 0x0024) == 0x0024) { + return 0; + } + } + /* + printf("*Warning* autonegotiation timeout, status: 0x%x\n",na_mii_read(MII_PHY_STATUS)); + */ + return (1); +} + +static unsigned int na_mii_check_speed (void) +{ + unsigned int status; + + /* Read Status register */ + status = na_mii_read (MII_PHY_STATUS); + /* Check link status. If 0, default to 100 Mbps. */ + if ((status & 0x0004) == 0) { + printf ("*Warning* no link detected, set default speed to 100Mbs\n"); + return 1; + } else { + if ((na_mii_read (17) & 0x4000) != 0) { + printf ("100Mbs link detected\n"); + return 1; + } else { + printf ("10Mbs link detected\n"); + return 0; + } + } + return 0; +} + +static int reset_eth (void) +{ + int pt; + + na_get_mac_addr (); + pt = na_mii_identify_phy (); + + /* reset the phy */ + na_mii_write (MII_PHY_CONTROL, 0x8000); + reset_timer_masked (); + while (get_timer_masked () < NA_MII_NEGOTIATE_DELAY) { + if ((na_mii_read (MII_PHY_STATUS) & 0x8000) == 0) { + break; + } + } + if (get_timer_masked () >= NA_MII_NEGOTIATE_DELAY) + printf ("phy reset timeout\n"); + + /* set the PCS reg */ + SET_EADDR (NETARM_ETH_PCS_CFG, NETARM_ETH_PCSC_CLKS_25M | + NETARM_ETH_PCSC_ENJAB | NETARM_ETH_PCSC_NOCFR); + + na_mii_negotiate (); + na_mii_check_speed (); + + /* Delay 10 millisecond. (Maybe this should be 1 second.) */ + udelay (10000); + + /* Turn receive on. + Enable statistics register autozero on read. + Do not insert MAC address on transmit. + Do not enable special test modes. */ + SET_EADDR (NETARM_ETH_STL_CFG, + (NETARM_ETH_STLC_AUTOZ | NETARM_ETH_STLC_RXEN)); + + /* Set the inter-packet gap delay to 0.96us for MII. + The NET+ARM H/W Reference Guide indicates that the Back-to-back IPG + Gap Timer Register should be set to 0x15 and the Non Back-to-back IPG + Gap Timer Register should be set to 0x00000C12 for the MII PHY. */ + SET_EADDR (NETARM_ETH_B2B_IPG_GAP_TMR, 0x15); + SET_EADDR (NETARM_ETH_NB2B_IPG_GAP_TMR, 0x00000C12); + + /* Add CRC to end of packets. + Pad packets to minimum length of 64 bytes. + Allow unlimited length transmit packets. + Receive all broadcast packets. + NOTE: Multicast addressing is NOT enabled here currently. */ + SET_EADDR (NETARM_ETH_MAC_CFG, + (NETARM_ETH_MACC_CRCEN | + NETARM_ETH_MACC_PADEN | NETARM_ETH_MACC_HUGEN)); + SET_EADDR (NETARM_ETH_SAL_FILTER, NETARM_ETH_SALF_BROAD); + + /* enable fifos */ + SET_EADDR (NETARM_ETH_GEN_CTRL, + (NETARM_ETH_GCR_ERX | NETARM_ETH_GCR_ETX)); + + return (0); +} + + +extern int eth_init (bd_t * bd) +{ + reset_eth (); + return 0; +} + +extern void eth_halt (void) +{ + SET_EADDR (NETARM_ETH_GEN_CTRL, 0); +} + +/* Get a data block via Ethernet */ +extern int eth_rx (void) +{ + int i; + unsigned short rxlen; + unsigned int *addr; + unsigned int rxstatus, lastrxlen; + char *pa; + + /* RXBR is 1, data block was received */ + if ((GET_EADDR (NETARM_ETH_GEN_STAT) & NETARM_ETH_GST_RXBR) == 0) + return 0; + + /* get status register and the length of received block */ + rxstatus = GET_EADDR (NETARM_ETH_RX_STAT); + rxlen = (rxstatus & NETARM_ETH_RXSTAT_SIZE) >> 16; + + if (rxlen == 0) + return 0; + + /* clear RXBR to make fifo available */ + SET_EADDR (NETARM_ETH_GEN_STAT, + GET_EADDR (NETARM_ETH_GEN_STAT) & ~NETARM_ETH_GST_RXBR); + + /* clear TXBC to make fifo available */ + /* According to NETARM50 data manual you just have to clear + RXBR but that has no effect. Only after clearing TXBC the + Fifo becomes readable. */ + SET_EADDR (NETARM_ETH_GEN_STAT, + GET_EADDR (NETARM_ETH_GEN_STAT) & ~NETARM_ETH_GST_TXBC); + + addr = (unsigned int *) NetRxPackets[0]; + pa = (char *) NetRxPackets[0]; + + /* read the fifo */ + for (i = 0; i < rxlen / 4; i++) { + *addr = GET_EADDR (NETARM_ETH_FIFO_DAT1); + addr++; + } + + if (GET_EADDR (NETARM_ETH_GEN_STAT) & NETARM_ETH_GST_RXREGR) { + /* RXFDB indicates wether the last word is 1,2,3 or 4 bytes long */ + lastrxlen = + (GET_EADDR (NETARM_ETH_GEN_STAT) & + NETARM_ETH_GST_RXFDB) >> 28; + *addr = GET_EADDR (NETARM_ETH_FIFO_DAT1); + switch (lastrxlen) { + case 1: + *addr &= 0xff000000; + break; + case 2: + *addr &= 0xffff0000; + break; + case 3: + *addr &= 0xffffff00; + break; + } + } + + /* Pass the packet up to the protocol layers. */ + NetReceive (NetRxPackets[0], rxlen); + + return rxlen; +} + +/* Send a data block via Ethernet. */ +extern int eth_send (volatile void *packet, int length) +{ + int i, length32; + char *pa; + unsigned int *pa32, lastp = 0, rest; + + pa = (char *) packet; + pa32 = (unsigned int *) packet; + length32 = length / 4; + rest = length % 4; + + /* make sure there's no garbage in the last word */ + switch (rest) { + case 0: + lastp = pa32[length32]; + length32--; + break; + case 1: + lastp = pa32[length32] & 0x000000ff; + break; + case 2: + lastp = pa32[length32] & 0x0000ffff; + break; + case 3: + lastp = pa32[length32] & 0x00ffffff; + break; + } + + /* write to the fifo */ + for (i = 0; i < length32; i++) + SET_EADDR (NETARM_ETH_FIFO_DAT1, pa32[i]); + + /* the last word is written to an extra register, this + starts the transmission */ + SET_EADDR (NETARM_ETH_FIFO_DAT2, lastp); + + /* NETARM_ETH_TXSTAT_TXOK should be checked, to know if the transmission + went fine. But we can't use the timer for a timeout loop because + of it is used already in upper layers. So we just try some times. */ + i = 0; + while (i < 50000) { + if ((GET_EADDR (NETARM_ETH_TX_STAT) & NETARM_ETH_TXSTAT_TXOK) + == NETARM_ETH_TXSTAT_TXOK) + return 0; + i++; + } + + printf ("eth_send timeout\n"); + return 1; +} + +#endif /* COMMANDS & CFG_NET */ + +#endif /* CONFIG_DRIVER_NETARMETH */ |