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linux/drivers/net/tulip/21142.c
Francois Romieu 0bb3cf726b [PATCH] Defer tulip_select_media() to process context 
Move tulip_select_media() processing to a workqueue, instead of
delaying in interrupt context, edited by Kyle McMartin to use kevent
thread, instead of creating its own workqueue.

Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Signed-off-by: Valerie Henson <val_henson@linux.intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-11 09:05:37 -04:00

246 lines
7.9 KiB
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/*
drivers/net/tulip/21142.c
Maintained by Valerie Henson <val_henson@linux.intel.com>
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 refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
for more information on this driver, or visit the project
Web page at http://sourceforge.net/projects/tulip/
*/
#include <linux/pci.h>
#include <linux/delay.h>
#include "tulip.h"
static u16 t21142_csr13[] = { 0x0001, 0x0009, 0x0009, 0x0000, 0x0001, };
u16 t21142_csr14[] = { 0xFFFF, 0x0705, 0x0705, 0x0000, 0x7F3D, };
static u16 t21142_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, };
/* Handle the 21143 uniquely: do autoselect with NWay, not the EEPROM list
of available transceivers. */
void t21142_media_task(void *data)
{
struct net_device *dev = data;
struct tulip_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->base_addr;
int csr12 = ioread32(ioaddr + CSR12);
int next_tick = 60*HZ;
int new_csr6 = 0;
if (tulip_debug > 2)
printk(KERN_INFO"%s: 21143 negotiation status %8.8x, %s.\n",
dev->name, csr12, medianame[dev->if_port]);
if (tulip_media_cap[dev->if_port] & MediaIsMII) {
if (tulip_check_duplex(dev) < 0) {
netif_carrier_off(dev);
next_tick = 3*HZ;
} else {
netif_carrier_on(dev);
next_tick = 60*HZ;
}
} else if (tp->nwayset) {
/* Don't screw up a negotiated session! */
if (tulip_debug > 1)
printk(KERN_INFO"%s: Using NWay-set %s media, csr12 %8.8x.\n",
dev->name, medianame[dev->if_port], csr12);
} else if (tp->medialock) {
;
} else if (dev->if_port == 3) {
if (csr12 & 2) { /* No 100mbps link beat, revert to 10mbps. */
if (tulip_debug > 1)
printk(KERN_INFO"%s: No 21143 100baseTx link beat, %8.8x, "
"trying NWay.\n", dev->name, csr12);
t21142_start_nway(dev);
next_tick = 3*HZ;
}
} else if ((csr12 & 0x7000) != 0x5000) {
/* Negotiation failed. Search media types. */
if (tulip_debug > 1)
printk(KERN_INFO"%s: 21143 negotiation failed, status %8.8x.\n",
dev->name, csr12);
if (!(csr12 & 4)) { /* 10mbps link beat good. */
new_csr6 = 0x82420000;
dev->if_port = 0;
iowrite32(0, ioaddr + CSR13);
iowrite32(0x0003FFFF, ioaddr + CSR14);
iowrite16(t21142_csr15[dev->if_port], ioaddr + CSR15);
iowrite32(t21142_csr13[dev->if_port], ioaddr + CSR13);
} else {
/* Select 100mbps port to check for link beat. */
new_csr6 = 0x83860000;
dev->if_port = 3;
iowrite32(0, ioaddr + CSR13);
iowrite32(0x0003FF7F, ioaddr + CSR14);
iowrite16(8, ioaddr + CSR15);
iowrite32(1, ioaddr + CSR13);
}
if (tulip_debug > 1)
printk(KERN_INFO"%s: Testing new 21143 media %s.\n",
dev->name, medianame[dev->if_port]);
if (new_csr6 != (tp->csr6 & ~0x00D5)) {
tp->csr6 &= 0x00D5;
tp->csr6 |= new_csr6;
iowrite32(0x0301, ioaddr + CSR12);
tulip_restart_rxtx(tp);
}
next_tick = 3*HZ;
}
/* mod_timer synchronizes us with potential add_timer calls
* from interrupts.
*/
mod_timer(&tp->timer, RUN_AT(next_tick));
}
void t21142_start_nway(struct net_device *dev)
{
struct tulip_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->base_addr;
int csr14 = ((tp->sym_advertise & 0x0780) << 9) |
((tp->sym_advertise & 0x0020) << 1) | 0xffbf;
dev->if_port = 0;
tp->nway = tp->mediasense = 1;
tp->nwayset = tp->lpar = 0;
if (tulip_debug > 1)
printk(KERN_DEBUG "%s: Restarting 21143 autonegotiation, csr14=%8.8x.\n",
dev->name, csr14);
iowrite32(0x0001, ioaddr + CSR13);
udelay(100);
iowrite32(csr14, ioaddr + CSR14);
tp->csr6 = 0x82420000 | (tp->sym_advertise & 0x0040 ? FullDuplex : 0);
iowrite32(tp->csr6, ioaddr + CSR6);
if (tp->mtable && tp->mtable->csr15dir) {
iowrite32(tp->mtable->csr15dir, ioaddr + CSR15);
iowrite32(tp->mtable->csr15val, ioaddr + CSR15);
} else
iowrite16(0x0008, ioaddr + CSR15);
iowrite32(0x1301, ioaddr + CSR12); /* Trigger NWAY. */
}
void t21142_lnk_change(struct net_device *dev, int csr5)
{
struct tulip_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->base_addr;
int csr12 = ioread32(ioaddr + CSR12);
if (tulip_debug > 1)
printk(KERN_INFO"%s: 21143 link status interrupt %8.8x, CSR5 %x, "
"%8.8x.\n", dev->name, csr12, csr5, ioread32(ioaddr + CSR14));
/* If NWay finished and we have a negotiated partner capability. */
if (tp->nway && !tp->nwayset && (csr12 & 0x7000) == 0x5000) {
int setup_done = 0;
int negotiated = tp->sym_advertise & (csr12 >> 16);
tp->lpar = csr12 >> 16;
tp->nwayset = 1;
if (negotiated & 0x0100) dev->if_port = 5;
else if (negotiated & 0x0080) dev->if_port = 3;
else if (negotiated & 0x0040) dev->if_port = 4;
else if (negotiated & 0x0020) dev->if_port = 0;
else {
tp->nwayset = 0;
if ((csr12 & 2) == 0 && (tp->sym_advertise & 0x0180))
dev->if_port = 3;
}
tp->full_duplex = (tulip_media_cap[dev->if_port] & MediaAlwaysFD) ? 1:0;
if (tulip_debug > 1) {
if (tp->nwayset)
printk(KERN_INFO "%s: Switching to %s based on link "
"negotiation %4.4x & %4.4x = %4.4x.\n",
dev->name, medianame[dev->if_port], tp->sym_advertise,
tp->lpar, negotiated);
else
printk(KERN_INFO "%s: Autonegotiation failed, using %s,"
" link beat status %4.4x.\n",
dev->name, medianame[dev->if_port], csr12);
}
if (tp->mtable) {
int i;
for (i = 0; i < tp->mtable->leafcount; i++)
if (tp->mtable->mleaf[i].media == dev->if_port) {
int startup = ! ((tp->chip_id == DC21143 && (tp->revision == 48 || tp->revision == 65)));
tp->cur_index = i;
tulip_select_media(dev, startup);
setup_done = 1;
break;
}
}
if ( ! setup_done) {
tp->csr6 = (dev->if_port & 1 ? 0x838E0000 : 0x82420000) | (tp->csr6 & 0x20ff);
if (tp->full_duplex)
tp->csr6 |= 0x0200;
iowrite32(1, ioaddr + CSR13);
}
#if 0 /* Restart shouldn't be needed. */
iowrite32(tp->csr6 | RxOn, ioaddr + CSR6);
if (tulip_debug > 2)
printk(KERN_DEBUG "%s: Restarting Tx and Rx, CSR5 is %8.8x.\n",
dev->name, ioread32(ioaddr + CSR5));
#endif
tulip_start_rxtx(tp);
if (tulip_debug > 2)
printk(KERN_DEBUG "%s: Setting CSR6 %8.8x/%x CSR12 %8.8x.\n",
dev->name, tp->csr6, ioread32(ioaddr + CSR6),
ioread32(ioaddr + CSR12));
} else if ((tp->nwayset && (csr5 & 0x08000000)
&& (dev->if_port == 3 || dev->if_port == 5)
&& (csr12 & 2) == 2) ||
(tp->nway && (csr5 & (TPLnkFail)))) {
/* Link blew? Maybe restart NWay. */
del_timer_sync(&tp->timer);
t21142_start_nway(dev);
tp->timer.expires = RUN_AT(3*HZ);
add_timer(&tp->timer);
} else if (dev->if_port == 3 || dev->if_port == 5) {
if (tulip_debug > 1)
printk(KERN_INFO"%s: 21143 %s link beat %s.\n",
dev->name, medianame[dev->if_port],
(csr12 & 2) ? "failed" : "good");
if ((csr12 & 2) && ! tp->medialock) {
del_timer_sync(&tp->timer);
t21142_start_nway(dev);
tp->timer.expires = RUN_AT(3*HZ);
add_timer(&tp->timer);
} else if (dev->if_port == 5)
iowrite32(ioread32(ioaddr + CSR14) & ~0x080, ioaddr + CSR14);
} else if (dev->if_port == 0 || dev->if_port == 4) {
if ((csr12 & 4) == 0)
printk(KERN_INFO"%s: 21143 10baseT link beat good.\n",
dev->name);
} else if (!(csr12 & 4)) { /* 10mbps link beat good. */
if (tulip_debug)
printk(KERN_INFO"%s: 21143 10mbps sensed media.\n",
dev->name);
dev->if_port = 0;
} else if (tp->nwayset) {
if (tulip_debug)
printk(KERN_INFO"%s: 21143 using NWay-set %s, csr6 %8.8x.\n",
dev->name, medianame[dev->if_port], tp->csr6);
} else { /* 100mbps link beat good. */
if (tulip_debug)
printk(KERN_INFO"%s: 21143 100baseTx sensed media.\n",
dev->name);
dev->if_port = 3;
tp->csr6 = 0x838E0000 | (tp->csr6 & 0x20ff);
iowrite32(0x0003FF7F, ioaddr + CSR14);
iowrite32(0x0301, ioaddr + CSR12);
tulip_restart_rxtx(tp);
}
}
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