svn commit: r190596 - head/sys/dev/ed

[Warner Losh]

Author: imp
Date: Tue Mar 31 18:25:09 2009
New Revision: 190596
URL: http://svn.freebsd.org/changeset/base/190596

Log:
  o Minor tweaks to the AX88x90 probe routine, mostly related to comments.
  o Don't run through the register initialization in the read mac routine
    for the AX88x90.  It duplicates other stuff that we do.
  o Eliminate the 10ms delay after we reset the AX88x90.  We already wait for
    the appropriate bits to indicate reset is done.

Modified:
  head/sys/dev/ed/if_ed_pccard.c

Modified: head/sys/dev/ed/if_ed_pccard.c
==============================================================================
--- head/sys/dev/ed/if_ed_pccard.c	Tue Mar 31 17:52:05 2009	(r190595)
+++ head/sys/dev/ed/if_ed_pccard.c	Tue Mar 31 18:25:09 2009	(r190596)
@@ -730,10 +730,10 @@ ed_pccard_ax88x90_reset(struct ed_softc 
 	ed_nic_outb(sc, ED_P0_CR, ED_CR_RD2 | ED_CR_STP | ED_CR_PAGE_0);
 	ed_asic_outb(sc, ED_NOVELL_RESET, ed_asic_inb(sc, ED_NOVELL_RESET));
 
-	/* Wait for the interrupt to fire */
-	for (i = 10000; i > 0; i--)
-		if (ed_nic_inb(sc, ED_P0_ISR) & ED_ISR_RST)
-			break;
+	/* Wait for the RST bit to assert, but cap it at 10ms */
+	for (i = 10000; !(ed_nic_inb(sc, ED_P0_ISR) & ED_ISR_RST) && i > 0;
+	     i--)
+		continue;
 	ed_nic_outb(sc, ED_P0_ISR, ED_ISR_RST);	/* ACK INTR */
 	if (i == 0)
 		device_printf(sc->dev, "Reset didn't finish\n");
@@ -751,7 +751,6 @@ ed_probe_ax88x90_generic(device_t dev, i
 	char    test_buffer[32];
 
 	ed_pccard_ax88x90_reset(sc);
-	DELAY(10 * 1000);
 
 	/* Make sure that we really have an 8390 based board */
 	if (!ed_probe_generic8390(sc))
@@ -762,42 +761,35 @@ ed_probe_ax88x90_generic(device_t dev, i
 	sc->cr_proto = ED_CR_RD2;
 
 	/*
-	 * Test the ability to read and write to the NIC memory.
-	 */
-
-	/*
 	 * This prevents packets from being stored in the NIC memory when the
-	 * readmem routine turns on the start bit in the CR.
+	 * readmem routine turns on the start bit in the CR.  We write some
+	 * bytes in word mode and verify we can read them back.  If we can't
+	 * then we don't have an AX88x90 chip here.
 	 */
 	ed_nic_outb(sc, ED_P0_RCR, ED_RCR_MON);
-
-	/* Temporarily initialize DCR for byte operations */
-	ed_nic_outb(sc, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS);
 	sc->isa16bit = 1;
 	ed_nic_outb(sc, ED_P0_DCR, ED_DCR_WTS | ED_DCR_FT1 | ED_DCR_LS);
 	ed_nic_outb(sc, ED_P0_PSTART, 16384 / ED_PAGE_SIZE);
 	ed_nic_outb(sc, ED_P0_PSTOP, 32768 / ED_PAGE_SIZE);
-	/*
-	 * Write a test pattern in word mode. If this also fails, then
-	 * we don't know what this board is.
-	 */
 	ed_pio_writemem(sc, test_pattern, 16384, sizeof(test_pattern));
 	ed_pio_readmem(sc, 16384, test_buffer, sizeof(test_pattern));
 	if (bcmp(test_pattern, test_buffer, sizeof(test_pattern)) != 0)
 		return (ENXIO);
+
+	/*
+	 * Hard code values based on the datasheet.  We're NE-2000 compatible
+	 * NIC with 16kb of packet memory starting at 16k offset.  We assume
+	 * that the writes to ED_P0_START and ED_P0_STOP reflect the values
+	 * below.
+	 */
 	sc->type = ED_TYPE_NE2000;
 	if (ed_asic_inb(sc, ED_AX88X90_TEST) != 0)
 		sc->chip_type = ED_CHIP_TYPE_AX88790;
 	else
 		sc->chip_type = ED_CHIP_TYPE_AX88190;
-
-	/* 8k of memory plus an additional 8k if 16bit */
-	memsize = 8192 + sc->isa16bit * 8192;
+	memsize = 16 * 1024;
 	sc->mem_size = memsize;
-
-	/* NIC memory doesn't start at zero on an NE board */
-	/* The start address is tied to the bus width */
-	sc->mem_start = 8192 + sc->isa16bit * 8192;
+	sc->mem_start = 16 * 1024;
 	sc->mem_end = sc->mem_start + memsize;
 	sc->tx_page_start = memsize / ED_PAGE_SIZE;
 	sc->txb_cnt = 2;
@@ -815,30 +807,7 @@ static int
 ed_pccard_ax88x90_enaddr(struct ed_softc *sc)
 {
 	int i, j;
-	struct {
-		unsigned char offset, value;
-	} pg_seq[] = {
-						/* Select Page0 */
-		{ED_P0_CR, ED_CR_RD2 | ED_CR_STP | ED_CR_PAGE_0},
-		{ED_P0_DCR, 0x01},
-		{ED_P0_RBCR0, 0x00},		/* Clear the count regs. */
-		{ED_P0_RBCR1, 0x00},
-		{ED_P0_IMR, 0x00},		/* Mask completion irq. */
-		{ED_P0_ISR, 0xff},
-		{ED_P0_RCR, ED_RCR_MON | ED_RCR_INTT}, /* Set To Monitor */
-		{ED_P0_TCR, ED_TCR_LB0},	/* loopback mode. */
-		{ED_P0_RBCR0, 0x20},
-		{ED_P0_RBCR1, 0x00},
-		{ED_P0_RSAR0, 0x00},
-		{ED_P0_RSAR1, 0x04},
-		{ED_P0_CR, ED_CR_RD0 | ED_CR_STA | ED_CR_PAGE_0},
-	};
-
-	/* Card Settings */
-	for (i = 0; i < sizeof(pg_seq) / sizeof(pg_seq[0]); i++)
-		ed_nic_outb(sc, pg_seq[i].offset, pg_seq[i].value);
-
-	/* Get Data */
+	/* Get MAC address */
 	for (i = 0; i < ETHER_ADDR_LEN; i += 2) {
 		j = ed_asic_inw(sc, 0);
 		sc->enaddr[i] = j & 0xff;