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-rw-r--r--drivers/3c589.c522
1 files changed, 522 insertions, 0 deletions
diff --git a/drivers/3c589.c b/drivers/3c589.c
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--- /dev/null
+++ b/drivers/3c589.c
@@ -0,0 +1,522 @@
+/*------------------------------------------------------------------------
+ . 3c589.c
+ . This is a driver for 3Com's 3C589 (Etherlink III) PCMCIA Ethernet device.
+ .
+ . (C) Copyright 2002
+ . Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ . Rolf Offermanns <rof@sysgo.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
+ .
+ ----------------------------------------------------------------------------*/
+
+#include <common.h>
+#include <command.h>
+#include <net.h>
+
+#ifdef CONFIG_DRIVER_3C589
+
+#include "3c589.h"
+
+
+/* Use power-down feature of the chip */
+#define POWER_DOWN 0
+
+#define NO_AUTOPROBE
+
+static const char version[] =
+ "Your ad here! :P\n";
+
+
+#undef EL_DEBUG
+
+typedef unsigned char byte;
+typedef unsigned short word;
+typedef unsigned long int dword;
+/*------------------------------------------------------------------------
+ .
+ . Configuration options, for the experienced user to change.
+ .
+ -------------------------------------------------------------------------*/
+
+/*
+ . Wait time for memory to be free. This probably shouldn't be
+ . tuned that much, as waiting for this means nothing else happens
+ . in the system
+*/
+#define MEMORY_WAIT_TIME 16
+
+
+#if (EL_DEBUG > 2 )
+#define PRINTK3(args...) printf(args)
+#else
+#define PRINTK3(args...)
+#endif
+
+#if EL_DEBUG > 1
+#define PRINTK2(args...) printf(args)
+#else
+#define PRINTK2(args...)
+#endif
+
+#ifdef EL_DEBUG
+#define PRINTK(args...) printf(args)
+#else
+#define PRINTK(args...)
+#endif
+
+#define outb(args...) mmio_outb(args)
+#define mmio_outb(value, addr) (*((volatile byte *)(addr)) = value)
+
+#define inb(args...) mmio_inb(args)
+#define mmio_inb(addr) (*((volatile byte *)(addr)))
+
+#define outw(args...) mmio_outw(args)
+#define mmio_outw(value, addr) (*((volatile word *)(addr)) = value)
+
+#define inw(args...) mmio_inw(args)
+#define mmio_inw(addr) (*((volatile word *)(addr)))
+
+#define outsw(args...) mmio_outsw(args)
+#define mmio_outsw(r,b,l) ({ int __i; \
+ word *__b2; \
+ __b2 = (word *) b; \
+ for (__i = 0; __i < l; __i++) { \
+ mmio_outw( *(__b2 + __i), r); \
+ } \
+ })
+
+#define insw(args...) mmio_insw(args)
+#define mmio_insw(r,b,l) ({ int __i ; \
+ word *__b2; \
+ __b2 = (word *) b; \
+ for (__i = 0; __i < l; __i++) { \
+ *(__b2 + __i) = mmio_inw(r); \
+ mmio_inw(0); \
+ }; \
+ })
+
+/*------------------------------------------------------------------------
+ .
+ . The internal workings of the driver. If you are changing anything
+ . here with the 3Com stuff, you should have the datasheet and know
+ . what you are doing.
+ .
+ -------------------------------------------------------------------------*/
+#define EL_BASE_ADDR 0x20000000
+
+
+/* Offsets from base I/O address. */
+#define EL3_DATA 0x00
+#define EL3_TIMER 0x0a
+#define EL3_CMD 0x0e
+#define EL3_STATUS 0x0e
+
+#define EEPROM_READ 0x0080
+
+#define EL3WINDOW(win_num) mmio_outw(SelectWindow + (win_num), EL_BASE_ADDR + EL3_CMD)
+
+/* The top five bits written to EL3_CMD are a command, the lower
+ 11 bits are the parameter, if applicable. */
+enum c509cmd {
+ TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
+ RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
+ TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
+ FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
+ SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
+ SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
+ StatsDisable = 22<<11, StopCoax = 23<<11,
+};
+
+enum c509status {
+ IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
+ TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
+ IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000
+};
+
+/* The SetRxFilter command accepts the following classes: */
+enum RxFilter {
+ RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
+};
+
+/* Register window 1 offsets, the window used in normal operation. */
+#define TX_FIFO 0x00
+#define RX_FIFO 0x00
+#define RX_STATUS 0x08
+#define TX_STATUS 0x0B
+#define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
+
+
+/*
+ Read a word from the EEPROM using the regular EEPROM access register.
+ Assume that we are in register window zero.
+*/
+static word read_eeprom(dword ioaddr, int index)
+{
+ int i;
+ outw(EEPROM_READ + index, ioaddr + 0xa);
+ /* Reading the eeprom takes 162 us */
+ for (i = 1620; i >= 0; i--)
+ if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
+ break;
+ return inw(ioaddr + 0xc);
+}
+
+static void el_get_mac_addr( unsigned char *mac_addr )
+{
+ int i;
+ union
+ {
+ word w;
+ unsigned char b[2];
+ } wrd;
+ unsigned char old_window = inw( EL_BASE_ADDR + EL3_STATUS ) >> 13;
+ GO_WINDOW(0);
+ VX_BUSY_WAIT;
+ for (i = 0; i < 3; i++)
+ {
+ wrd.w = read_eeprom(EL_BASE_ADDR, 0xa+i);
+#ifdef __BIG_ENDIAN
+ mac_addr[2*i] = wrd.b[0];
+ mac_addr[2*i+1] = wrd.b[1];
+#else
+ mac_addr[2*i] = wrd.b[1];
+ mac_addr[2*i+1] = wrd.b[0];
+#endif
+ }
+ GO_WINDOW(old_window);
+ VX_BUSY_WAIT;
+}
+
+
+#if EL_DEBUG > 1
+static void print_packet( byte * buf, int length )
+{
+ int i;
+ int remainder;
+ int lines;
+
+ PRINTK2("Packet of length %d \n", length );
+
+ lines = length / 16;
+ remainder = length % 16;
+
+ for ( i = 0; i < lines ; i ++ ) {
+ int cur;
+
+ for ( cur = 0; cur < 8; cur ++ ) {
+ byte a, b;
+
+ a = *(buf ++ );
+ b = *(buf ++ );
+ PRINTK2("%02x%02x ", a, b );
+ }
+ PRINTK2("\n");
+ }
+ for ( i = 0; i < remainder/2 ; i++ ) {
+ byte a, b;
+
+ a = *(buf ++ );
+ b = *(buf ++ );
+ PRINTK2("%02x%02x ", a, b );
+ }
+ PRINTK2("\n");
+}
+#endif /* EL_DEBUG > 1 */
+
+
+
+/**************************************************************************
+ETH_RESET - Reset adapter
+***************************************************************************/
+static void el_reset(bd_t *bd)
+{
+ /***********************************************************
+ Reset 3Com 595 card
+ *************************************************************/
+ /* QUICK HACK
+ * - adjust timing for 3c589
+ * - enable io for PCMCIA */
+ outw(0x0004, 0xa0000018);
+ udelay(100);
+ outw(0x0041, 0x28010000);
+ udelay(100);
+
+ /* issue global reset */
+ outw(GLOBAL_RESET, BASE + VX_COMMAND);
+
+ /* must wait for at least 1ms */
+ udelay(100000000);
+
+ /* set mac addr */
+ {
+ unsigned char *mac_addr = bd->bi_enetaddr;
+ int i;
+
+ el_get_mac_addr( mac_addr );
+
+ GO_WINDOW(2);
+ VX_BUSY_WAIT;
+
+ printf("3C589 MAC Addr.: ");
+ for (i = 0; i < 6; i++)
+ {
+ printf("%02x", mac_addr[i]);
+ outb(mac_addr[i], BASE + VX_W2_ADDR_0 + i);
+ VX_BUSY_WAIT;
+ }
+ printf("\n\n");
+ }
+
+ /* set RX filter */
+ outw(SET_RX_FILTER | FIL_INDIVIDUAL | FIL_BRDCST, BASE + VX_COMMAND);
+ VX_BUSY_WAIT;
+
+
+ /* set irq mask and read_zero */
+ outw(SET_RD_0_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
+ S_TX_COMPLETE | S_TX_AVAIL, BASE + VX_COMMAND);
+ VX_BUSY_WAIT;
+
+ outw(SET_INTR_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
+ S_TX_COMPLETE | S_TX_AVAIL, BASE + VX_COMMAND);
+ VX_BUSY_WAIT;
+
+ /* enable TP Linkbeat */
+ GO_WINDOW(4);
+ VX_BUSY_WAIT;
+
+ outw( ENABLE_UTP, BASE + VX_W4_MEDIA_TYPE);
+ VX_BUSY_WAIT;
+
+
+/*
+ * Attempt to get rid of any stray interrupts that occured during
+ * configuration. On the i386 this isn't possible because one may
+ * already be queued. However, a single stray interrupt is
+ * unimportant.
+ */
+
+ outw(ACK_INTR | 0xff, BASE + VX_COMMAND);
+ VX_BUSY_WAIT;
+
+ /* enable TX and RX */
+ outw( RX_ENABLE, BASE + VX_COMMAND );
+ VX_BUSY_WAIT;
+
+ outw( TX_ENABLE, BASE + VX_COMMAND );
+ VX_BUSY_WAIT;
+
+
+ /* print the diag. regs. */
+ PRINTK2("Diag. Regs\n");
+ PRINTK2("--> MEDIA_TYPE: %04x\n", inw(BASE + VX_W4_MEDIA_TYPE));
+ PRINTK2("--> NET_DIAG: %04x\n", inw(BASE + VX_W4_NET_DIAG));
+ PRINTK2("--> FIFO_DIAG: %04x\n", inw(BASE + VX_W4_FIFO_DIAG));
+ PRINTK2("--> CTRLR_STATUS: %04x\n", inw(BASE + VX_W4_CTRLR_STATUS));
+ PRINTK2("\n\n");
+
+ /* enter working mode */
+ GO_WINDOW(1);
+ VX_BUSY_WAIT;
+
+ /* wait for another 1ms */
+ udelay(100000000);
+}
+
+
+/*-----------------------------------------------------------------
+ .
+ . The driver can be entered at any of the following entry points.
+ .
+ .------------------------------------------------------------------ */
+
+extern int eth_init(bd_t *bd);
+extern void eth_halt(void);
+extern int eth_rx(void);
+extern int eth_send(volatile void *packet, int length);
+
+
+/*
+ ------------------------------------------------------------
+ .
+ . Internal routines
+ .
+ ------------------------------------------------------------
+*/
+
+int eth_init(bd_t *bd)
+{
+ el_reset(bd);
+ return 0;
+}
+
+void eth_halt() {
+ return;
+}
+
+#define EDEBUG 1
+
+
+/**************************************************************************
+ETH_POLL - Wait for a frame
+***************************************************************************/
+
+int eth_rx()
+{
+ word status, rx_status, packet_size;
+
+ VX_BUSY_WAIT;
+
+ status = inw( BASE + VX_STATUS );
+
+ if ( (status & S_RX_COMPLETE) == 0 ) return 0; /* nothing to do */
+
+ /* Packet waiting -> check RX_STATUS */
+ rx_status = inw( BASE + VX_W1_RX_STATUS );
+
+ if ( rx_status & ERR_RX )
+ {
+ /* error in packet -> discard */
+ PRINTK("[ERROR] Invalid packet -> discarding\n");
+ PRINTK("-- error code 0x%02x\n", rx_status & ERR_MASK);
+ PRINTK("-- rx bytes 0x%04d\n", rx_status & ((1<<11) - 1));
+ PRINTK("[ERROR] Invalid packet -> discarding\n");
+ outw( RX_DISCARD_TOP_PACK, BASE + VX_COMMAND );
+ return 0;
+ }
+
+ /* correct pack. waiting in fifo */
+ packet_size = rx_status & RX_BYTES_MASK;
+
+ PRINTK("Correct packet waiting in fifo, size: %d\n", packet_size);
+
+ {
+ volatile word *packet_start = (word *)(BASE + VX_W1_RX_PIO_RD_1);
+ word *RcvBuffer = (word *)(NetRxPackets[0]);
+ int wcount = 0;
+
+ for (wcount = 0; wcount < (packet_size >> 1); wcount++)
+ {
+ *RcvBuffer++ = *(packet_start);
+ }
+
+ /* handle odd packets */
+ if ( packet_size & 1 )
+ {
+ *RcvBuffer++ = *(packet_start);
+ }
+ }
+
+ /* fifo should now be empty (besides the padding bytes) */
+ if ( ((*((word *)(BASE + VX_W1_RX_STATUS))) & RX_BYTES_MASK) > 3 )
+ {
+ PRINTK("[ERROR] Fifo not empty after packet read (remaining pkts: %d)\n",
+ (((*(word *)(BASE + VX_W1_RX_STATUS))) & RX_BYTES_MASK));
+ }
+
+ /* discard packet */
+ *((word *)(BASE + VX_COMMAND)) = RX_DISCARD_TOP_PACK;
+
+ /* Pass Packets to upper Layer */
+ NetReceive(NetRxPackets[0], packet_size);
+ return packet_size;
+}
+
+
+
+/**************************************************************************
+ETH_TRANSMIT - Transmit a frame
+***************************************************************************/
+static char padmap[] = {
+ 0, 3, 2, 1};
+
+
+int eth_send(volatile void *packet, int length) {
+ int pad;
+ int status;
+ volatile word *buf = (word *)packet;
+ int dummy = 0;
+
+ /* padding stuff */
+ pad = padmap[length & 3];
+
+ PRINTK("eth_send(), length: %d\n", length);
+ /* drop acknowledgements */
+ while(( status=inb(EL_BASE_ADDR + VX_W1_TX_STATUS) )& TXS_COMPLETE ) {
+ if(status & (TXS_UNDERRUN|TXS_MAX_COLLISION|TXS_STATUS_OVERFLOW)) {
+ outw(TX_RESET, EL_BASE_ADDR + VX_COMMAND);
+ outw(TX_ENABLE, EL_BASE_ADDR + VX_COMMAND);
+ PRINTK("Bad status, resetting and reenabling transmitter\n");
+ }
+
+ outb(0x0, EL_BASE_ADDR + VX_W1_TX_STATUS);
+ }
+
+
+ while (inw(EL_BASE_ADDR + VX_W1_FREE_TX) < length + pad + 4) {
+ /* no room in FIFO */
+ if (dummy == 0)
+ {
+ PRINTK("No room in FIFO, waiting...\n");
+ dummy++;
+ }
+
+ }
+
+ PRINTK(" ---> FIFO ready\n");
+
+
+ outw(length, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
+
+ /* Second dword meaningless */
+ outw(0x0, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
+
+#if EL_DEBUG > 1
+ print_packet((byte *)buf, length);
+#endif
+
+ /* write packet */
+ {
+ unsigned int i, totw;
+
+ totw = ((length + 1) >> 1);
+ PRINTK("Buffer: (totw = %d)\n", totw);
+ for (i = 0; i < totw; i++) {
+ outw( *(buf+i), EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
+ udelay(10);
+ }
+ if(totw & 1)
+ { /* pad to double word length */
+ outw( 0, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
+ udelay(10);
+ }
+ PRINTK("\n\n");
+ }
+
+ /* wait for Tx complete */
+ PRINTK("Waiting for Tx to complete...\n");
+ while(((status = inw(EL_BASE_ADDR + VX_STATUS)) & S_COMMAND_IN_PROGRESS) != 0)
+ {
+ udelay(10);
+ }
+ PRINTK(" ---> Tx completed, status = 0x%04x\n", status);
+
+ return length;
+}
+
+
+
+#endif /* CONFIG_DRIVER_3C589 */
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