/*
drivers/net/ethernet/dec/tulip/media.c
Copyright 2000,2001 The Linux Kernel Team
Written/copyright 1994-2001 by Donald Becker.
This software may be used and distributed according to the terms
of the GNU General Public License, incorporated herein by reference.
Please submit bugs to http://bugzilla.kernel.org/ .
*/
#include <linux/kernel.h>
#include <linux/mii.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include "tulip.h"
/* The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
met by back-to-back PCI I/O cycles, but we insert a delay to avoid
"overclocking" issues or future 66Mhz PCI. */
#define mdio_delay() ioread32(mdio_addr)
/* Read and write the MII registers using software-generated serial
MDIO protocol. It is just different enough from the EEPROM protocol
to not share code. The maxium data clock rate is 2.5 Mhz. */
#define MDIO_SHIFT_CLK
0x10000
#define MDIO_DATA_WRITE0
0x00000
#define MDIO_DATA_WRITE1
0x20000
#define MDIO_ENB
0x00000
/* Ignore the 0x02000 databook setting. */
#define MDIO_ENB_IN
0x40000
#define MDIO_DATA_READ
0x80000
static const unsigned char comet_miireg2offset[
32] = {
0xB4,
0xB8,
0xBC,
0xC0,
0xC4,
0xC8,
0xCC,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0xD0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0xD4,
0xD8,
0xDC, };
/* MII transceiver control section.
Read and write the MII registers using software-generated serial
MDIO protocol.
See IEEE 802.3-2002.pdf (Section 2, Chapter "22.2.4 Management functions")
or DP83840A data sheet for more details.
*/
int tulip_mdio_read(
struct net_device *dev,
int phy_id,
int location)
{
struct tulip_private *tp = netdev_priv(dev);
int i;
int read_cmd = (
0xf6 <<
10) | ((phy_id &
0x1f) <<
5) | location;
int retval =
0;
void __iomem *ioaddr = tp->base_addr;
void __iomem *mdio_addr = ioaddr + CSR9;
unsigned long flags;
if (location & ~
0x1f)
return 0xffff;
if (tp->chip_id == COMET && phy_id ==
30) {
if (comet_miireg2offset[location])
return ioread32(ioaddr + comet_miireg2offset[location]);
return 0xffff;
}
spin_lock_irqsave(&tp->mii_lock, flags);
if (tp->chip_id == LC82C168) {
iowrite32(
0x60020000 + (phy_id<<
23) + (location<<
18), ioaddr +
0xA0);
ioread32(ioaddr +
0xA0);
ioread32(ioaddr +
0xA0);
for (i =
1000; i >=
0; --i) {
barrier();
if ( ! ((retval = ioread32(ioaddr +
0xA0)) &
0x80000000))
break;
}
spin_unlock_irqrestore(&tp->mii_lock, flags);
return retval &
0xffff;
}
/* Establish sync by sending at least 32 logic ones. */
for (i =
32; i >=
0; i--) {
iowrite32(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
mdio_delay();
iowrite32(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;
iowrite32(MDIO_ENB | dataval, mdio_addr);
mdio_delay();
iowrite32(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--) {
iowrite32(MDIO_ENB_IN, mdio_addr);
mdio_delay();
retval = (retval <<
1) | ((ioread32(mdio_addr) & MDIO_DATA_READ) ?
1 :
0);
iowrite32(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
mdio_delay();
}
spin_unlock_irqrestore(&tp->mii_lock, flags);
return (retval>>
1) &
0xffff;
}
void tulip_mdio_write(
struct net_device *dev,
int phy_id,
int location,
int val)
{
struct tulip_private *tp = netdev_priv(dev);
int i;
int cmd = (
0x5002 <<
16) | ((phy_id &
0x1f) <<
23) | (location<<
18) | (val &
0xffff);
void __iomem *ioaddr = tp->base_addr;
void __iomem *mdio_addr = ioaddr + CSR9;
unsigned long flags;
if (location & ~
0x1f)
return;
if (tp->chip_id == COMET && phy_id ==
30) {
if (comet_miireg2offset[location])
iowrite32(val, ioaddr + comet_miireg2offset[location]);
return;
}
spin_lock_irqsave(&tp->mii_lock, flags);
if (tp->chip_id == LC82C168) {
iowrite32(cmd, ioaddr +
0xA0);
for (i =
1000; i >=
0; --i) {
barrier();
if ( ! (ioread32(ioaddr +
0xA0) &
0x80000000))
break;
}
spin_unlock_irqrestore(&tp->mii_lock, flags);
return;
}
/* Establish sync by sending 32 logic ones. */
for (i =
32; i >=
0; i--) {
iowrite32(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
mdio_delay();
iowrite32(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;
iowrite32(MDIO_ENB | dataval, mdio_addr);
mdio_delay();
iowrite32(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
mdio_delay();
}
/* Clear out extra bits. */
for (i =
2; i >
0; i--) {
iowrite32(MDIO_ENB_IN, mdio_addr);
mdio_delay();
iowrite32(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
mdio_delay();
}
spin_unlock_irqrestore(&tp->mii_lock, flags);
}
/* Set up the transceiver control registers for the selected media type. */
void tulip_select_media(
struct net_device *dev,
int startup)
{
struct tulip_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->base_addr;
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)
netdev_dbg(dev,
"Using a 21140 non-MII transceiver with control setting %02x\n",
p[
1]);
dev->if_port = p[
0];
if (startup)
iowrite32(mtable->csr12dir |
0x100, ioaddr + CSR12);
iowrite32(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] & MEDIA_MASK;
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)
netdev_dbg(dev,
"Resetting the transceiver\n");
for (i =
0; i < rst[
0]; i++)
iowrite32(get_u16(rst +
1 + (i<<
1)) <<
16, ioaddr + CSR15);
}
if (tulip_debug >
1)
netdev_dbg(dev,
"21143 non-MII %s transceiver control %04x/%04x\n",
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];
iowrite32(
0, ioaddr + CSR13);
iowrite32(csr14val, ioaddr + CSR14);
iowrite32(csr15dir, ioaddr + CSR15);
/* Direction */
iowrite32(csr15val, ioaddr + CSR15);
/* Data */
iowrite32(csr13val, ioaddr + CSR13);
}
else {
csr13val =
1;
csr14val =
0;
csr15dir = (setup[
0]<<
16) |
0x0008;
csr15val = (setup[
1]<<
16) |
0x0008;
if (dev->if_port <=
4)
csr14val = t21142_csr14[dev->if_port];
if (startup) {
iowrite32(
0, ioaddr + CSR13);
iowrite32(csr14val, ioaddr + CSR14);
}
iowrite32(csr15dir, ioaddr + CSR15);
/* Direction */
iowrite32(csr15val, ioaddr + CSR15);
/* Data */
if (startup) iowrite32(csr13val, ioaddr + CSR13);
}
if (tulip_debug >
1)
netdev_dbg(dev,
"Setting CSR15 to %08x/%08x\n",
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, tmp_info;
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) {
int timeout =
10;
/* max 1 ms */
for (i =
0; i < reset_length; i++)
iowrite32(get_u16(&reset_sequence[i]) <<
16, ioaddr + CSR15);
/* flush posted writes */
ioread32(ioaddr + CSR15);
/* Sect 3.10.3 in DP83840A.pdf (p39) */
udelay(
500);
/* Section 4.2 in DP83840A.pdf (p43) */
/* and IEEE 802.3 "22.2.4.1.1 Reset" */
while (timeout-- &&
(tulip_mdio_read (dev, phy_num, MII_BMCR) & BMCR_RESET))
udelay(
100);
}
for (i =
0; i < init_length; i++)
iowrite32(get_u16(&init_sequence[i]) <<
16, ioaddr + CSR15);
ioread32(ioaddr + CSR15);
/* flush posted writes */
}
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) {
int timeout =
10;
/* max 1 ms */
iowrite32(mtable->csr12dir |
0x100, ioaddr + CSR12);
for (i =
0; i < reset_length; i++)
iowrite32(reset_sequence[i], ioaddr + CSR12);
/* flush posted writes */
ioread32(ioaddr + CSR12);
/* Sect 3.10.3 in DP83840A.pdf (p39) */
udelay(
500);
/* Section 4.2 in DP83840A.pdf (p43) */
/* and IEEE 802.3 "22.2.4.1.1 Reset" */
while (timeout-- &&
(tulip_mdio_read (dev, phy_num, MII_BMCR) & BMCR_RESET))
udelay(
100);
}
for (i =
0; i < init_length; i++)
iowrite32(init_sequence[i], ioaddr + CSR12);
ioread32(ioaddr + CSR12);
/* flush posted writes */
}
tmp_info = get_u16(&misc_info[
1]);
if (tmp_info)
tp->advertising[phy_num] = tmp_info |
1;
if (tmp_info && startup <
2) {
if (tp->mii_advertise ==
0)
tp->mii_advertise = tp->advertising[phy_num];
if (tulip_debug >
1)
netdev_dbg(dev,
" Advertising %04x on MII %d\n",
tp->mii_advertise,
tp->phys[phy_num]);
tulip_mdio_write(dev, tp->phys[phy_num],
4, tp->mii_advertise);
}
break;
}
case 5:
case 6: {
new_csr6 =
0;
/* FIXME */
if (startup && mtable->has_reset) {
struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset];
unsigned char *rst = rleaf->leafdata;
if (tulip_debug >
1)
netdev_dbg(dev,
"Resetting the transceiver\n");
for (i =
0; i < rst[
0]; i++)
iowrite32(get_u16(rst +
1 + (i<<
1)) <<
16, ioaddr + CSR15);
}
break;
}
default:
netdev_dbg(dev,
" Invalid media table selection %d\n",
mleaf->type);
new_csr6 =
0x020E0000;
}
if (tulip_debug >
1)
netdev_dbg(dev,
"Using media type %s, CSR12 is %02x\n",
medianame[dev->if_port],
ioread32(ioaddr + CSR12) &
0xff);
}
else if (tp->chip_id == LC82C168) {
if (startup && ! tp->medialock)
dev->if_port = tp->mii_cnt ?
11 :
0;
if (tulip_debug >
1)
netdev_dbg(dev,
"PNIC PHY status is %3.3x, media %s\n",
ioread32(ioaddr +
0xB8),
medianame[dev->if_port]);
if (tp->mii_cnt) {
new_csr6 =
0x810C0000;
iowrite32(
0x0001, ioaddr + CSR15);
iowrite32(
0x0201B07A, ioaddr +
0xB8);
}
else if (startup) {
/* Start with 10mbps to do autonegotiation. */
iowrite32(
0x32, ioaddr + CSR12);
new_csr6 =
0x00420000;
iowrite32(
0x0001B078, ioaddr +
0xB8);
iowrite32(
0x0201B078, ioaddr +
0xB8);
}
else if (dev->if_port ==
3 || dev->if_port ==
5) {
iowrite32(
0x33, ioaddr + CSR12);
new_csr6 =
0x01860000;
/* Trigger autonegotiation. */
iowrite32(
0x0001F868, ioaddr +
0xB8);
}
else {
iowrite32(
0x32, ioaddr + CSR12);
new_csr6 =
0x00420000;
iowrite32(
0x1F078, ioaddr +
0xB8);
}
}
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 =
0x02860000;
}
else
new_csr6 =
0x03860000;
if (tulip_debug >
1)
netdev_dbg(dev,
"No media description table, assuming %s transceiver, CSR12 %02x\n",
medianame[dev->if_port],
ioread32(ioaddr + CSR12));
}
tp->csr6 = new_csr6 | (tp->csr6 &
0xfdff) | (tp->full_duplex ?
0x0200 :
0);
mdelay(
1);
}
/*
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 = netdev_priv(dev);
unsigned int bmsr, lpa, negotiated, new_csr6;
bmsr = tulip_mdio_read(dev, tp->phys[
0], MII_BMSR);
lpa = tulip_mdio_read(dev, tp->phys[
0], MII_LPA);
if (tulip_debug >
1)
dev_info(&dev->dev,
"MII status %04x, Link partner report %04x\n",
bmsr, lpa);
if (bmsr ==
0xffff)
return -
2;
if ((bmsr & BMSR_LSTATUS) ==
0) {
int new_bmsr = tulip_mdio_read(dev, tp->phys[
0], MII_BMSR);
if ((new_bmsr & BMSR_LSTATUS) ==
0) {
if (tulip_debug >
1)
dev_info(&dev->dev,
"No link beat on the MII interface, status %04x\n",
new_bmsr);
return -
1;
}
}
negotiated = lpa & tp->advertising[
0];
tp->full_duplex = mii_duplex(tp->full_duplex_lock, negotiated);
new_csr6 = tp->csr6;
if (negotiated & LPA_100) new_csr6 &= ~TxThreshold;
else new_csr6 |= TxThreshold;
if (tp->full_duplex) new_csr6 |= FullDuplex;
else new_csr6 &= ~FullDuplex;
if (new_csr6 != tp->csr6) {
tp->csr6 = new_csr6;
tulip_restart_rxtx(tp);
if (tulip_debug >
0)
dev_info(&dev->dev,
"Setting %s-duplex based on MII#%d link partner capability of %04x\n",
tp->full_duplex ?
"full" :
"half",
tp->phys[
0], lpa);
return 1;
}
return 0;
}
void tulip_find_mii(
struct net_device *dev,
int board_idx)
{
struct tulip_private *tp = netdev_priv(dev);
int phyn, phy_idx =
0;
int mii_reg0;
int mii_advert;
unsigned int to_advert, new_bmcr, ane_switch;
/* Find the connected MII xcvrs.
Doing this in open() would allow detecting external xcvrs later,
but takes much time. */
for (phyn =
1; phyn <=
32 && phy_idx < ARRAY_SIZE(tp->phys); phyn++) {
int phy = phyn &
0x1f;
int mii_status = tulip_mdio_read (dev, phy, MII_BMSR);
if ((mii_status &
0x8301) ==
0x8001 ||
((mii_status & BMSR_100BASE4) ==
0 &&
(mii_status &
0x7800) !=
0)) {
/* preserve Becker logic, gain indentation level */
}
else {
continue;
}
mii_reg0 = tulip_mdio_read (dev, phy, MII_BMCR);
mii_advert = tulip_mdio_read (dev, phy, MII_ADVERTISE);
ane_switch =
0;
/* if not advertising at all, gen an
* advertising value from the capability
* bits in BMSR
*/
if ((mii_advert & ADVERTISE_ALL) ==
0) {
unsigned int tmpadv = tulip_mdio_read (dev, phy, MII_BMSR);
mii_advert = ((tmpadv >>
6) &
0x3e0) |
1;
}
if (tp->mii_advertise) {
tp->advertising[phy_idx] =
to_advert = tp->mii_advertise;
}
else if (tp->advertising[phy_idx]) {
to_advert = tp->advertising[phy_idx];
}
else {
tp->advertising[phy_idx] =
tp->mii_advertise =
to_advert = mii_advert;
}
tp->phys[phy_idx++] = phy;
pr_info(
"tulip%d: MII transceiver #%d config %04x status %04x advertising %04x\n",
board_idx, phy, mii_reg0, mii_status, mii_advert);
/* Fixup for DLink with miswired PHY. */
if (mii_advert != to_advert) {
pr_debug(
"tulip%d: Advertising %04x on PHY %d, previously advertising %04x\n",
board_idx, to_advert, phy, mii_advert);
tulip_mdio_write (dev, phy,
4, to_advert);
}
/* Enable autonegotiation: some boards default to off. */
if (tp->default_port ==
0) {
new_bmcr = mii_reg0 | BMCR_ANENABLE;
if (new_bmcr != mii_reg0) {
new_bmcr |= BMCR_ANRESTART;
ane_switch =
1;
}
}
/* ...or disable nway, if forcing media */
else {
new_bmcr = mii_reg0 & ~BMCR_ANENABLE;
if (new_bmcr != mii_reg0)
ane_switch =
1;
}
/* clear out bits we never want at this point */
new_bmcr &= ~(BMCR_CTST | BMCR_FULLDPLX | BMCR_ISOLATE |
BMCR_PDOWN | BMCR_SPEED100 | BMCR_LOOPBACK |
BMCR_RESET);
if (tp->full_duplex)
new_bmcr |= BMCR_FULLDPLX;
if (tulip_media_cap[tp->default_port] & MediaIs100)
new_bmcr |= BMCR_SPEED100;
if (new_bmcr != mii_reg0) {
/* some phys need the ANE switch to
* happen before forced media settings
* will "take." However, we write the
* same value twice in order not to
* confuse the sane phys.
*/
if (ane_switch) {
tulip_mdio_write (dev, phy, MII_BMCR, new_bmcr);
udelay (
10);
}
tulip_mdio_write (dev, phy, MII_BMCR, new_bmcr);
}
}
tp->mii_cnt = phy_idx;
if (tp->mtable && tp->mtable->has_mii && phy_idx ==
0) {
pr_info(
"tulip%d: ***WARNING***: No MII transceiver found!\n",
board_idx);
tp->phys[
0] =
1;
}
}