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Diffstat (limited to 'drivers/net/tulip/media.c')
-rw-r--r--drivers/net/tulip/media.c403
1 files changed, 403 insertions, 0 deletions
diff --git a/drivers/net/tulip/media.c b/drivers/net/tulip/media.c
new file mode 100644
index 000000000..1d4c3b2e4
--- /dev/null
+++ b/drivers/net/tulip/media.c
@@ -0,0 +1,403 @@
+/*
+ drivers/net/tulip/media.c
+
+ Maintained by Jeff Garzik <jgarzik@mandrakesoft.com>
+ Copyright 2000 The Linux Kernel Team
+ Written/copyright 1994-1999 by Donald Becker.
+
+ This software may be used and distributed according to the terms
+ of the GNU Public License, incorporated herein by reference.
+
+ Please refer to Documentation/networking/tulip.txt for more
+ information on this driver.
+
+*/
+
+#include "tulip.h"
+#include <asm/io.h>
+
+
+/* This is a mysterious value that can be written to CSR11 in the 21040 (only)
+ to support a pre-NWay full-duplex signaling mechanism using short frames.
+ No one knows what it should be, but if left at its default value some
+ 10base2(!) packets trigger a full-duplex-request interrupt. */
+#define FULL_DUPLEX_MAGIC 0x6969
+
+
+/* MII transceiver control section.
+ Read and write the MII registers using software-generated serial
+ MDIO protocol. See the MII specifications or DP83840A data sheet
+ for details. */
+
+int tulip_mdio_read(struct net_device *dev, int phy_id, int location)
+{
+ struct tulip_private *tp = (struct tulip_private *)dev->priv;
+ int i;
+ int read_cmd = (0xf6 << 10) | (phy_id << 5) | location;
+ int retval = 0;
+ long ioaddr = dev->base_addr;
+ long mdio_addr = ioaddr + CSR9;
+
+ if (tp->chip_id == LC82C168) {
+ int i = 1000;
+ outl(0x60020000 + (phy_id<<23) + (location<<18), ioaddr + 0xA0);
+ inl(ioaddr + 0xA0);
+ inl(ioaddr + 0xA0);
+ while (--i > 0)
+ if ( ! ((retval = inl(ioaddr + 0xA0)) & 0x80000000))
+ return retval & 0xffff;
+ return 0xffff;
+ }
+
+ if (tp->chip_id == COMET) {
+ if (phy_id == 1) {
+ if (location < 7)
+ return inl(ioaddr + 0xB4 + (location<<2));
+ else if (location == 17)
+ return inl(ioaddr + 0xD0);
+ else if (location >= 29 && location <= 31)
+ return inl(ioaddr + 0xD4 + ((location-29)<<2));
+ }
+ return 0xffff;
+ }
+
+ /* Establish sync by sending at least 32 logic ones. */
+ for (i = 32; i >= 0; i--) {
+ outl(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
+ mdio_delay();
+ outl(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
+ mdio_delay();
+ }
+ /* Shift the read command bits out. */
+ for (i = 15; i >= 0; i--) {
+ int dataval = (read_cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
+
+ outl(MDIO_ENB | dataval, mdio_addr);
+ mdio_delay();
+ outl(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
+ mdio_delay();
+ }
+ /* Read the two transition, 16 data, and wire-idle bits. */
+ for (i = 19; i > 0; i--) {
+ outl(MDIO_ENB_IN, mdio_addr);
+ mdio_delay();
+ retval = (retval << 1) | ((inl(mdio_addr) & MDIO_DATA_READ) ? 1 : 0);
+ outl(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
+ mdio_delay();
+ }
+ return (retval>>1) & 0xffff;
+}
+
+void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int value)
+{
+ struct tulip_private *tp = (struct tulip_private *)dev->priv;
+ int i;
+ int cmd = (0x5002 << 16) | (phy_id << 23) | (location<<18) | value;
+ long ioaddr = dev->base_addr;
+ long mdio_addr = ioaddr + CSR9;
+
+ if (tp->chip_id == LC82C168) {
+ int i = 1000;
+ outl(cmd, ioaddr + 0xA0);
+ do
+ if ( ! (inl(ioaddr + 0xA0) & 0x80000000))
+ break;
+ while (--i > 0);
+ return;
+ }
+
+ if (tp->chip_id == COMET) {
+ if (phy_id != 1)
+ return;
+ if (location < 7)
+ outl(value, ioaddr + 0xB4 + (location<<2));
+ else if (location == 17)
+ outl(value, ioaddr + 0xD0);
+ else if (location >= 29 && location <= 31)
+ outl(value, ioaddr + 0xD4 + ((location-29)<<2));
+ return;
+ }
+
+ /* Establish sync by sending 32 logic ones. */
+ for (i = 32; i >= 0; i--) {
+ outl(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
+ mdio_delay();
+ outl(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
+ mdio_delay();
+ }
+ /* Shift the command bits out. */
+ for (i = 31; i >= 0; i--) {
+ int dataval = (cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
+ outl(MDIO_ENB | dataval, mdio_addr);
+ mdio_delay();
+ outl(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
+ mdio_delay();
+ }
+ /* Clear out extra bits. */
+ for (i = 2; i > 0; i--) {
+ outl(MDIO_ENB_IN, mdio_addr);
+ mdio_delay();
+ outl(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
+ mdio_delay();
+ }
+}
+
+
+/* Set up the transceiver control registers for the selected media type. */
+void tulip_select_media(struct net_device *dev, int startup)
+{
+ long ioaddr = dev->base_addr;
+ struct tulip_private *tp = (struct tulip_private *)dev->priv;
+ struct mediatable *mtable = tp->mtable;
+ u32 new_csr6;
+ int i;
+
+ if (mtable) {
+ struct medialeaf *mleaf = &mtable->mleaf[tp->cur_index];
+ unsigned char *p = mleaf->leafdata;
+ switch (mleaf->type) {
+ case 0: /* 21140 non-MII xcvr. */
+ if (tulip_debug > 1)
+ printk(KERN_DEBUG "%s: Using a 21140 non-MII transceiver"
+ " with control setting %2.2x.\n",
+ dev->name, p[1]);
+ dev->if_port = p[0];
+ if (startup)
+ outl(mtable->csr12dir | 0x100, ioaddr + CSR12);
+ outl(p[1], ioaddr + CSR12);
+ new_csr6 = 0x02000000 | ((p[2] & 0x71) << 18);
+ break;
+ case 2: case 4: {
+ u16 setup[5];
+ u32 csr13val, csr14val, csr15dir, csr15val;
+ for (i = 0; i < 5; i++)
+ setup[i] = get_u16(&p[i*2 + 1]);
+
+ dev->if_port = p[0] & 15;
+ if (tulip_media_cap[dev->if_port] & MediaAlwaysFD)
+ tp->full_duplex = 1;
+
+ if (startup && mtable->has_reset) {
+ struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset];
+ unsigned char *rst = rleaf->leafdata;
+ if (tulip_debug > 1)
+ printk(KERN_DEBUG "%s: Resetting the transceiver.\n",
+ dev->name);
+ for (i = 0; i < rst[0]; i++)
+ outl(get_u16(rst + 1 + (i<<1)) << 16, ioaddr + CSR15);
+ }
+ if (tulip_debug > 1)
+ printk(KERN_DEBUG "%s: 21143 non-MII %s transceiver control "
+ "%4.4x/%4.4x.\n",
+ dev->name, medianame[dev->if_port], setup[0], setup[1]);
+ if (p[0] & 0x40) { /* SIA (CSR13-15) setup values are provided. */
+ csr13val = setup[0];
+ csr14val = setup[1];
+ csr15dir = (setup[3]<<16) | setup[2];
+ csr15val = (setup[4]<<16) | setup[2];
+ outl(0, ioaddr + CSR13);
+ outl(csr14val, ioaddr + CSR14);
+ outl(csr15dir, ioaddr + CSR15); /* Direction */
+ outl(csr15val, ioaddr + CSR15); /* Data */
+ outl(csr13val, ioaddr + CSR13);
+ } else {
+ csr13val = 1;
+ csr14val = 0x0003FF7F;
+ csr15dir = (setup[0]<<16) | 0x0008;
+ csr15val = (setup[1]<<16) | 0x0008;
+ if (dev->if_port <= 4)
+ csr14val = t21142_csr14[dev->if_port];
+ if (startup) {
+ outl(0, ioaddr + CSR13);
+ outl(csr14val, ioaddr + CSR14);
+ }
+ outl(csr15dir, ioaddr + CSR15); /* Direction */
+ outl(csr15val, ioaddr + CSR15); /* Data */
+ if (startup) outl(csr13val, ioaddr + CSR13);
+ }
+ if (tulip_debug > 1)
+ printk(KERN_DEBUG "%s: Setting CSR15 to %8.8x/%8.8x.\n",
+ dev->name, csr15dir, csr15val);
+ if (mleaf->type == 4)
+ new_csr6 = 0x82020000 | ((setup[2] & 0x71) << 18);
+ else
+ new_csr6 = 0x82420000;
+ break;
+ }
+ case 1: case 3: {
+ int phy_num = p[0];
+ int init_length = p[1];
+ u16 *misc_info;
+ u16 to_advertise;
+
+ dev->if_port = 11;
+ new_csr6 = 0x020E0000;
+ if (mleaf->type == 3) { /* 21142 */
+ u16 *init_sequence = (u16*)(p+2);
+ u16 *reset_sequence = &((u16*)(p+3))[init_length];
+ int reset_length = p[2 + init_length*2];
+ misc_info = reset_sequence + reset_length;
+ if (startup)
+ for (i = 0; i < reset_length; i++)
+ outl(get_u16(&reset_sequence[i]) << 16, ioaddr + CSR15);
+ for (i = 0; i < init_length; i++)
+ outl(get_u16(&init_sequence[i]) << 16, ioaddr + CSR15);
+ } else {
+ u8 *init_sequence = p + 2;
+ u8 *reset_sequence = p + 3 + init_length;
+ int reset_length = p[2 + init_length];
+ misc_info = (u16*)(reset_sequence + reset_length);
+ if (startup) {
+ outl(mtable->csr12dir | 0x100, ioaddr + CSR12);
+ for (i = 0; i < reset_length; i++)
+ outl(reset_sequence[i], ioaddr + CSR12);
+ }
+ for (i = 0; i < init_length; i++)
+ outl(init_sequence[i], ioaddr + CSR12);
+ }
+ to_advertise = (get_u16(&misc_info[1]) & tp->to_advertise) | 1;
+ tp->advertising[phy_num] = to_advertise;
+ if (tulip_debug > 1)
+ printk(KERN_DEBUG "%s: Advertising %4.4x on PHY %d (%d).\n",
+ dev->name, to_advertise, phy_num, tp->phys[phy_num]);
+ /* Bogus: put in by a committee? */
+ tulip_mdio_write(dev, tp->phys[phy_num], 4, to_advertise);
+ break;
+ }
+ default:
+ printk(KERN_DEBUG "%s: Invalid media table selection %d.\n",
+ dev->name, mleaf->type);
+ new_csr6 = 0x020E0000;
+ }
+ if (tulip_debug > 1)
+ printk(KERN_DEBUG "%s: Using media type %s, CSR12 is %2.2x.\n",
+ dev->name, medianame[dev->if_port],
+ inl(ioaddr + CSR12) & 0xff);
+ } else if (tp->chip_id == DC21041) {
+ int port = dev->if_port <= 4 ? dev->if_port : 0;
+ if (tulip_debug > 1)
+ printk(KERN_DEBUG "%s: 21041 using media %s, CSR12 is %4.4x.\n",
+ dev->name, medianame[port == 3 ? 12: port],
+ inl(ioaddr + CSR12));
+ outl(0x00000000, ioaddr + CSR13); /* Reset the serial interface */
+ outl(t21041_csr14[port], ioaddr + CSR14);
+ outl(t21041_csr15[port], ioaddr + CSR15);
+ outl(t21041_csr13[port], ioaddr + CSR13);
+ new_csr6 = 0x80020000;
+ } else if (tp->chip_id == LC82C168) {
+ if (startup && ! tp->medialock)
+ dev->if_port = tp->mii_cnt ? 11 : 0;
+ if (tulip_debug > 1)
+ printk(KERN_DEBUG "%s: PNIC PHY status is %3.3x, media %s.\n",
+ dev->name, inl(ioaddr + 0xB8), medianame[dev->if_port]);
+ if (tp->mii_cnt) {
+ new_csr6 = 0x810C0000;
+ outl(0x0001, ioaddr + CSR15);
+ outl(0x0201B07A, ioaddr + 0xB8);
+ } else if (startup) {
+ /* Start with 10mbps to do autonegotiation. */
+ outl(0x32, ioaddr + CSR12);
+ new_csr6 = 0x00420000;
+ outl(0x0001B078, ioaddr + 0xB8);
+ outl(0x0201B078, ioaddr + 0xB8);
+ } else if (dev->if_port == 3 || dev->if_port == 5) {
+ outl(0x33, ioaddr + CSR12);
+ new_csr6 = 0x01860000;
+ /* Trigger autonegotiation. */
+ outl(startup ? 0x0201F868 : 0x0001F868, ioaddr + 0xB8);
+ } else {
+ outl(0x32, ioaddr + CSR12);
+ new_csr6 = 0x00420000;
+ outl(0x1F078, ioaddr + 0xB8);
+ }
+ } else if (tp->chip_id == DC21040) { /* 21040 */
+ /* Turn on the xcvr interface. */
+ int csr12 = inl(ioaddr + CSR12);
+ if (tulip_debug > 1)
+ printk(KERN_DEBUG "%s: 21040 media type is %s, CSR12 is %2.2x.\n",
+ dev->name, medianame[dev->if_port], csr12);
+ if (tulip_media_cap[dev->if_port] & MediaAlwaysFD)
+ tp->full_duplex = 1;
+ new_csr6 = 0x20000;
+ /* Set the full duplux match frame. */
+ outl(FULL_DUPLEX_MAGIC, ioaddr + CSR11);
+ outl(0x00000000, ioaddr + CSR13); /* Reset the serial interface */
+ if (t21040_csr13[dev->if_port] & 8) {
+ outl(0x0705, ioaddr + CSR14);
+ outl(0x0006, ioaddr + CSR15);
+ } else {
+ outl(0xffff, ioaddr + CSR14);
+ outl(0x0000, ioaddr + CSR15);
+ }
+ outl(0x8f01 | t21040_csr13[dev->if_port], ioaddr + CSR13);
+ } else { /* Unknown chip type with no media table. */
+ if (tp->default_port == 0)
+ dev->if_port = tp->mii_cnt ? 11 : 3;
+ if (tulip_media_cap[dev->if_port] & MediaIsMII) {
+ new_csr6 = 0x020E0000;
+ } else if (tulip_media_cap[dev->if_port] & MediaIsFx) {
+ new_csr6 = 0x028600000;
+ } else
+ new_csr6 = 0x038600000;
+ if (tulip_debug > 1)
+ printk(KERN_DEBUG "%s: No media description table, assuming "
+ "%s transceiver, CSR12 %2.2x.\n",
+ dev->name, medianame[dev->if_port],
+ inl(ioaddr + CSR12));
+ }
+
+ tp->csr6 = new_csr6 | (tp->csr6 & 0xfdff) | (tp->full_duplex ? 0x0200 : 0);
+ return;
+}
+
+/*
+ Check the MII negotiated duplex, and change the CSR6 setting if
+ required.
+ Return 0 if everything is OK.
+ Return < 0 if the transceiver is missing or has no link beat.
+ */
+int tulip_check_duplex(struct net_device *dev)
+{
+ struct tulip_private *tp = (struct tulip_private *)dev->priv;
+ int mii_reg1, mii_reg5, negotiated, duplex;
+
+ if (tp->full_duplex_lock)
+ return 0;
+ mii_reg1 = tulip_mdio_read(dev, tp->phys[0], 1);
+ mii_reg5 = tulip_mdio_read(dev, tp->phys[0], 5);
+ if (tulip_debug > 1)
+ printk(KERN_INFO "%s: MII status %4.4x, Link partner report "
+ "%4.4x.\n", dev->name, mii_reg1, mii_reg5);
+ if (mii_reg1 == 0xffff)
+ return -2;
+ if ((mii_reg1 & 0x0004) == 0) {
+ int new_reg1 = tulip_mdio_read(dev, tp->phys[0], 1);
+ if ((new_reg1 & 0x0004) == 0) {
+ if (tulip_debug > 1)
+ printk(KERN_INFO "%s: No link beat on the MII interface,"
+ " status %4.4x.\n", dev->name, new_reg1);
+ return -1;
+ }
+ }
+ negotiated = mii_reg5 & tp->advertising[0];
+ duplex = ((negotiated & 0x0300) == 0x0100
+ || (negotiated & 0x00C0) == 0x0040);
+ /* 100baseTx-FD or 10T-FD, but not 100-HD */
+ if (tp->full_duplex != duplex) {
+ tp->full_duplex = duplex;
+ if (negotiated & 0x038) /* 100mbps. */
+ tp->csr6 &= ~0x00400000;
+ if (tp->full_duplex) tp->csr6 |= 0x0200;
+ else tp->csr6 &= ~0x0200;
+ tulip_outl_CSR6(tp, tp->csr6 | 0x0002);
+ tulip_outl_CSR6(tp, tp->csr6 | 0x2002);
+ if (tulip_debug > 0)
+ printk(KERN_INFO "%s: Setting %s-duplex based on MII"
+ "#%d link partner capability of %4.4x.\n",
+ dev->name, tp->full_duplex ? "full" : "half",
+ tp->phys[0], mii_reg5);
+ return 1;
+ }
+ return 0;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-05 22:40:15 +0000