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linux/drivers/net/macsonic.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

658 lines
17 KiB
C
Raw Blame History

/*
* macsonic.c
*
* (C) 1998 Alan Cox
*
* Debugging Andreas Ehliar, Michael Schmitz
*
* Based on code
* (C) 1996 by Thomas Bogendoerfer (tsbogend@bigbug.franken.de)
*
* This driver is based on work from Andreas Busse, but most of
* the code is rewritten.
*
* (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
*
* A driver for the Mac onboard Sonic ethernet chip.
*
* 98/12/21 MSch: judged from tests on Q800, it's basically working,
* but eating up both receive and transmit resources
* and duplicating packets. Needs more testing.
*
* 99/01/03 MSch: upgraded to version 0.92 of the core driver, fixed.
*
* 00/10/31 sammy@oh.verio.com: Updated driver for 2.4 kernels, fixed problems
* on centris.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ctype.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/nubus.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/module.h>
#include <linux/bitops.h>
#include <asm/bootinfo.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/hwtest.h>
#include <asm/dma.h>
#include <asm/macintosh.h>
#include <asm/macints.h>
#include <asm/mac_via.h>
#define SREGS_PAD(n) u16 n;
#include "sonic.h"
#define SONIC_READ(reg) \
nubus_readl(base_addr+(reg))
#define SONIC_WRITE(reg,val) \
nubus_writel((val), base_addr+(reg))
#define sonic_read(dev, reg) \
nubus_readl((dev)->base_addr+(reg))
#define sonic_write(dev, reg, val) \
nubus_writel((val), (dev)->base_addr+(reg))
static int sonic_debug;
static int sonic_version_printed;
static int reg_offset;
extern int mac_onboard_sonic_probe(struct net_device* dev);
extern int mac_nubus_sonic_probe(struct net_device* dev);
/* For onboard SONIC */
#define ONBOARD_SONIC_REGISTERS 0x50F0A000
#define ONBOARD_SONIC_PROM_BASE 0x50f08000
enum macsonic_type {
MACSONIC_DUODOCK,
MACSONIC_APPLE,
MACSONIC_APPLE16,
MACSONIC_DAYNA,
MACSONIC_DAYNALINK
};
/* For the built-in SONIC in the Duo Dock */
#define DUODOCK_SONIC_REGISTERS 0xe10000
#define DUODOCK_SONIC_PROM_BASE 0xe12000
/* For Apple-style NuBus SONIC */
#define APPLE_SONIC_REGISTERS 0
#define APPLE_SONIC_PROM_BASE 0x40000
/* Daynalink LC SONIC */
#define DAYNALINK_PROM_BASE 0x400000
/* For Dayna-style NuBus SONIC (haven't seen one yet) */
#define DAYNA_SONIC_REGISTERS 0x180000
/* This is what OpenBSD says. However, this is definitely in NuBus
ROM space so we should be able to get it by walking the NuBus
resource directories */
#define DAYNA_SONIC_MAC_ADDR 0xffe004
#define SONIC_READ_PROM(addr) nubus_readb(prom_addr+addr)
struct net_device * __init macsonic_probe(int unit)
{
struct net_device *dev = alloc_etherdev(0);
int err;
if (!dev)
return ERR_PTR(-ENOMEM);
if (unit >= 0)
sprintf(dev->name, "eth%d", unit);
SET_MODULE_OWNER(dev);
/* This will catch fatal stuff like -ENOMEM as well as success */
err = mac_onboard_sonic_probe(dev);
if (err == 0)
goto found;
if (err != -ENODEV)
goto out;
err = mac_nubus_sonic_probe(dev);
if (err)
goto out;
found:
err = register_netdev(dev);
if (err)
goto out1;
return dev;
out1:
kfree(dev->priv);
out:
free_netdev(dev);
return ERR_PTR(err);
}
/*
* For reversing the PROM address
*/
static unsigned char nibbletab[] = {0, 8, 4, 12, 2, 10, 6, 14,
1, 9, 5, 13, 3, 11, 7, 15};
static inline void bit_reverse_addr(unsigned char addr[6])
{
int i;
for(i = 0; i < 6; i++)
addr[i] = ((nibbletab[addr[i] & 0xf] << 4) |
nibbletab[(addr[i] >> 4) &0xf]);
}
int __init macsonic_init(struct net_device* dev)
{
struct sonic_local* lp = NULL;
int i;
/* Allocate the entire chunk of memory for the descriptors.
Note that this cannot cross a 64K boundary. */
for (i = 0; i < 20; i++) {
unsigned long desc_base, desc_top;
if((lp = kmalloc(sizeof(struct sonic_local), GFP_KERNEL | GFP_DMA)) == NULL) {
printk(KERN_ERR "%s: couldn't allocate descriptor buffers\n", dev->name);
return -ENOMEM;
}
desc_base = (unsigned long) lp;
desc_top = desc_base + sizeof(struct sonic_local);
if ((desc_top & 0xffff) >= (desc_base & 0xffff))
break;
/* Hmm. try again (FIXME: does this actually work?) */
kfree(lp);
printk(KERN_DEBUG
"%s: didn't get continguous chunk [%08lx - %08lx], trying again\n",
dev->name, desc_base, desc_top);
}
if (lp == NULL) {
printk(KERN_ERR "%s: tried 20 times to allocate descriptor buffers, giving up.\n",
dev->name);
return -ENOMEM;
}
dev->priv = lp;
#if 0
/* this code is only here as a curiousity... mainly, where the
fuck did SONIC_BUS_SCALE come from, and what was it supposed
to do? the normal allocation works great for 32 bit stuffs.. */
/* Now set up the pointers to point to the appropriate places */
lp->cda = lp->sonic_desc;
lp->tda = lp->cda + (SIZEOF_SONIC_CDA * SONIC_BUS_SCALE(lp->dma_bitmode));
lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
* SONIC_BUS_SCALE(lp->dma_bitmode));
lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
* SONIC_BUS_SCALE(lp->dma_bitmode));
#endif
memset(lp, 0, sizeof(struct sonic_local));
lp->cda_laddr = (unsigned int)&(lp->cda);
lp->tda_laddr = (unsigned int)lp->tda;
lp->rra_laddr = (unsigned int)lp->rra;
lp->rda_laddr = (unsigned int)lp->rda;
/* FIXME, maybe we should use skbs */
if ((lp->rba = (char *)
kmalloc(SONIC_NUM_RRS * SONIC_RBSIZE, GFP_KERNEL | GFP_DMA)) == NULL) {
printk(KERN_ERR "%s: couldn't allocate receive buffers\n", dev->name);
dev->priv = NULL;
kfree(lp);
return -ENOMEM;
}
lp->rba_laddr = (unsigned int)lp->rba;
{
int rs, ds;
/* almost always 12*4096, but let's not take chances */
rs = ((SONIC_NUM_RRS * SONIC_RBSIZE + 4095) / 4096) * 4096;
/* almost always under a page, but let's not take chances */
ds = ((sizeof(struct sonic_local) + 4095) / 4096) * 4096;
kernel_set_cachemode(lp->rba, rs, IOMAP_NOCACHE_SER);
kernel_set_cachemode(lp, ds, IOMAP_NOCACHE_SER);
}
#if 0
flush_cache_all();
#endif
dev->open = sonic_open;
dev->stop = sonic_close;
dev->hard_start_xmit = sonic_send_packet;
dev->get_stats = sonic_get_stats;
dev->set_multicast_list = &sonic_multicast_list;
/*
* clear tally counter
*/
sonic_write(dev, SONIC_CRCT, 0xffff);
sonic_write(dev, SONIC_FAET, 0xffff);
sonic_write(dev, SONIC_MPT, 0xffff);
return 0;
}
int __init mac_onboard_sonic_ethernet_addr(struct net_device* dev)
{
const int prom_addr = ONBOARD_SONIC_PROM_BASE;
int i;
/* On NuBus boards we can sometimes look in the ROM resources.
No such luck for comm-slot/onboard. */
for(i = 0; i < 6; i++)
dev->dev_addr[i] = SONIC_READ_PROM(i);
/* Most of the time, the address is bit-reversed. The NetBSD
source has a rather long and detailed historical account of
why this is so. */
if (memcmp(dev->dev_addr, "\x08\x00\x07", 3) &&
memcmp(dev->dev_addr, "\x00\xA0\x40", 3) &&
memcmp(dev->dev_addr, "\x00\x05\x02", 3))
bit_reverse_addr(dev->dev_addr);
else
return 0;
/* If we still have what seems to be a bogus address, we'll
look in the CAM. The top entry should be ours. */
/* Danger! This only works if MacOS has already initialized
the card... */
if (memcmp(dev->dev_addr, "\x08\x00\x07", 3) &&
memcmp(dev->dev_addr, "\x00\xA0\x40", 3) &&
memcmp(dev->dev_addr, "\x00\x05\x02", 3))
{
unsigned short val;
printk(KERN_INFO "macsonic: PROM seems to be wrong, trying CAM entry 15\n");
sonic_write(dev, SONIC_CMD, SONIC_CR_RST);
sonic_write(dev, SONIC_CEP, 15);
val = sonic_read(dev, SONIC_CAP2);
dev->dev_addr[5] = val >> 8;
dev->dev_addr[4] = val & 0xff;
val = sonic_read(dev, SONIC_CAP1);
dev->dev_addr[3] = val >> 8;
dev->dev_addr[2] = val & 0xff;
val = sonic_read(dev, SONIC_CAP0);
dev->dev_addr[1] = val >> 8;
dev->dev_addr[0] = val & 0xff;
printk(KERN_INFO "HW Address from CAM 15: ");
for (i = 0; i < 6; i++) {
printk("%2.2x", dev->dev_addr[i]);
if (i < 5)
printk(":");
}
printk("\n");
} else return 0;
if (memcmp(dev->dev_addr, "\x08\x00\x07", 3) &&
memcmp(dev->dev_addr, "\x00\xA0\x40", 3) &&
memcmp(dev->dev_addr, "\x00\x05\x02", 3))
{
/*
* Still nonsense ... messed up someplace!
*/
printk(KERN_ERR "macsonic: ERROR (INVALID MAC)\n");
return -EIO;
} else return 0;
}
int __init mac_onboard_sonic_probe(struct net_device* dev)
{
/* Bwahahaha */
static int once_is_more_than_enough;
int i;
int dma_bitmode;
if (once_is_more_than_enough)
return -ENODEV;
once_is_more_than_enough = 1;
if (!MACH_IS_MAC)
return -ENODEV;
printk(KERN_INFO "Checking for internal Macintosh ethernet (SONIC).. ");
if (macintosh_config->ether_type != MAC_ETHER_SONIC)
{
printk("none.\n");
return -ENODEV;
}
/* Bogus probing, on the models which may or may not have
Ethernet (BTW, the Ethernet *is* always at the same
address, and nothing else lives there, at least if Apple's
documentation is to be believed) */
if (macintosh_config->ident == MAC_MODEL_Q630 ||
macintosh_config->ident == MAC_MODEL_P588 ||
macintosh_config->ident == MAC_MODEL_C610) {
unsigned long flags;
int card_present;
local_irq_save(flags);
card_present = hwreg_present((void*)ONBOARD_SONIC_REGISTERS);
local_irq_restore(flags);
if (!card_present) {
printk("none.\n");
return -ENODEV;
}
}
printk("yes\n");
/* Danger! My arms are flailing wildly! You *must* set this
before using sonic_read() */
dev->base_addr = ONBOARD_SONIC_REGISTERS;
if (via_alt_mapping)
dev->irq = IRQ_AUTO_3;
else
dev->irq = IRQ_NUBUS_9;
if (!sonic_version_printed) {
printk(KERN_INFO "%s", version);
sonic_version_printed = 1;
}
printk(KERN_INFO "%s: onboard / comm-slot SONIC at 0x%08lx\n",
dev->name, dev->base_addr);
/* Now do a song and dance routine in an attempt to determine
the bus width */
/* The PowerBook's SONIC is 16 bit always. */
if (macintosh_config->ident == MAC_MODEL_PB520) {
reg_offset = 0;
dma_bitmode = 0;
} else if (macintosh_config->ident == MAC_MODEL_C610) {
reg_offset = 0;
dma_bitmode = 1;
} else {
/* Some of the comm-slot cards are 16 bit. But some
of them are not. The 32-bit cards use offset 2 and
pad with zeroes or sometimes ones (I think...)
Therefore, if we try offset 0 and get a silicon
revision of 0, we assume 16 bit. */
int sr;
/* Technically this is not necessary since we zeroed
it above */
reg_offset = 0;
dma_bitmode = 0;
sr = sonic_read(dev, SONIC_SR);
if (sr == 0 || sr == 0xffff) {
reg_offset = 2;
/* 83932 is 0x0004, 83934 is 0x0100 or 0x0101 */
sr = sonic_read(dev, SONIC_SR);
dma_bitmode = 1;
}
printk(KERN_INFO
"%s: revision 0x%04x, using %d bit DMA and register offset %d\n",
dev->name, sr, dma_bitmode?32:16, reg_offset);
}
/* this carries my sincere apologies -- by the time I got to updating
the driver, support for "reg_offsets" appeares nowhere in the sonic
code, going back for over a year. Fortunately, my Mac does't seem
to use whatever this was.
If you know how this is supposed to be implemented, either fix it,
or contact me (sammy@oh.verio.com) to explain what it is. --Sam */
if(reg_offset) {
printk("%s: register offset unsupported. please fix this if you know what it is.\n", dev->name);
return -ENODEV;
}
/* Software reset, then initialize control registers. */
sonic_write(dev, SONIC_CMD, SONIC_CR_RST);
sonic_write(dev, SONIC_DCR, SONIC_DCR_BMS |
SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | SONIC_DCR_EXBUS |
(dma_bitmode ? SONIC_DCR_DW : 0));
/* This *must* be written back to in order to restore the
extended programmable output bits */
sonic_write(dev, SONIC_DCR2, 0);
/* Clear *and* disable interrupts to be on the safe side */
sonic_write(dev, SONIC_ISR,0x7fff);
sonic_write(dev, SONIC_IMR,0);
/* Now look for the MAC address. */
if (mac_onboard_sonic_ethernet_addr(dev) != 0)
return -ENODEV;
printk(KERN_INFO "MAC ");
for (i = 0; i < 6; i++) {
printk("%2.2x", dev->dev_addr[i]);
if (i < 5)
printk(":");
}
printk(" IRQ %d\n", dev->irq);
/* Shared init code */
return macsonic_init(dev);
}
int __init mac_nubus_sonic_ethernet_addr(struct net_device* dev,
unsigned long prom_addr,
int id)
{
int i;
for(i = 0; i < 6; i++)
dev->dev_addr[i] = SONIC_READ_PROM(i);
/* For now we are going to assume that they're all bit-reversed */
bit_reverse_addr(dev->dev_addr);
return 0;
}
int __init macsonic_ident(struct nubus_dev* ndev)
{
if (ndev->dr_hw == NUBUS_DRHW_ASANTE_LC &&
ndev->dr_sw == NUBUS_DRSW_SONIC_LC)
return MACSONIC_DAYNALINK;
if (ndev->dr_hw == NUBUS_DRHW_SONIC &&
ndev->dr_sw == NUBUS_DRSW_APPLE) {
/* There has to be a better way to do this... */
if (strstr(ndev->board->name, "DuoDock"))
return MACSONIC_DUODOCK;
else
return MACSONIC_APPLE;
}
return -1;
}
int __init mac_nubus_sonic_probe(struct net_device* dev)
{
static int slots;
struct nubus_dev* ndev = NULL;
unsigned long base_addr, prom_addr;
u16 sonic_dcr;
int id;
int i;
int dma_bitmode;
/* Find the first SONIC that hasn't been initialized already */
while ((ndev = nubus_find_type(NUBUS_CAT_NETWORK,
NUBUS_TYPE_ETHERNET, ndev)) != NULL)
{
/* Have we seen it already? */
if (slots & (1<<ndev->board->slot))
continue;
slots |= 1<<ndev->board->slot;
/* Is it one of ours? */
if ((id = macsonic_ident(ndev)) != -1)
break;
}
if (ndev == NULL)
return -ENODEV;
switch (id) {
case MACSONIC_DUODOCK:
base_addr = ndev->board->slot_addr + DUODOCK_SONIC_REGISTERS;
prom_addr = ndev->board->slot_addr + DUODOCK_SONIC_PROM_BASE;
sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT0 | SONIC_DCR_RFT1
| SONIC_DCR_TFT0;
reg_offset = 2;
dma_bitmode = 1;
break;
case MACSONIC_APPLE:
base_addr = ndev->board->slot_addr + APPLE_SONIC_REGISTERS;
prom_addr = ndev->board->slot_addr + APPLE_SONIC_PROM_BASE;
sonic_dcr = SONIC_DCR_BMS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0;
reg_offset = 0;
dma_bitmode = 1;
break;
case MACSONIC_APPLE16:
base_addr = ndev->board->slot_addr + APPLE_SONIC_REGISTERS;
prom_addr = ndev->board->slot_addr + APPLE_SONIC_PROM_BASE;
sonic_dcr = SONIC_DCR_EXBUS
| SONIC_DCR_RFT1 | SONIC_DCR_TFT0
| SONIC_DCR_PO1 | SONIC_DCR_BMS;
reg_offset = 0;
dma_bitmode = 0;
break;
case MACSONIC_DAYNALINK:
base_addr = ndev->board->slot_addr + APPLE_SONIC_REGISTERS;
prom_addr = ndev->board->slot_addr + DAYNALINK_PROM_BASE;
sonic_dcr = SONIC_DCR_RFT1 | SONIC_DCR_TFT0
| SONIC_DCR_PO1 | SONIC_DCR_BMS;
reg_offset = 0;
dma_bitmode = 0;
break;
case MACSONIC_DAYNA:
base_addr = ndev->board->slot_addr + DAYNA_SONIC_REGISTERS;
prom_addr = ndev->board->slot_addr + DAYNA_SONIC_MAC_ADDR;
sonic_dcr = SONIC_DCR_BMS
| SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | SONIC_DCR_PO1;
reg_offset = 0;
dma_bitmode = 0;
break;
default:
printk(KERN_ERR "macsonic: WTF, id is %d\n", id);
return -ENODEV;
}
/* Danger! My arms are flailing wildly! You *must* set this
before using sonic_read() */
dev->base_addr = base_addr;
dev->irq = SLOT2IRQ(ndev->board->slot);
if (!sonic_version_printed) {
printk(KERN_INFO "%s", version);
sonic_version_printed = 1;
}
printk(KERN_INFO "%s: %s in slot %X\n",
dev->name, ndev->board->name, ndev->board->slot);
printk(KERN_INFO "%s: revision 0x%04x, using %d bit DMA and register offset %d\n",
dev->name, sonic_read(dev, SONIC_SR), dma_bitmode?32:16, reg_offset);
if(reg_offset) {
printk("%s: register offset unsupported. please fix this if you know what it is.\n", dev->name);
return -ENODEV;
}
/* Software reset, then initialize control registers. */
sonic_write(dev, SONIC_CMD, SONIC_CR_RST);
sonic_write(dev, SONIC_DCR, sonic_dcr
| (dma_bitmode ? SONIC_DCR_DW : 0));
/* Clear *and* disable interrupts to be on the safe side */
sonic_write(dev, SONIC_ISR,0x7fff);
sonic_write(dev, SONIC_IMR,0);
/* Now look for the MAC address. */
if (mac_nubus_sonic_ethernet_addr(dev, prom_addr, id) != 0)
return -ENODEV;
printk(KERN_INFO "MAC ");
for (i = 0; i < 6; i++) {
printk("%2.2x", dev->dev_addr[i]);
if (i < 5)
printk(":");
}
printk(" IRQ %d\n", dev->irq);
/* Shared init code */
return macsonic_init(dev);
}
#ifdef MODULE
static struct net_device *dev_macsonic;
MODULE_PARM(sonic_debug, "i");
MODULE_PARM_DESC(sonic_debug, "macsonic debug level (1-4)");
int
init_module(void)
{
dev_macsonic = macsonic_probe(-1);
if (IS_ERR(dev_macsonic)) {
printk(KERN_WARNING "macsonic.c: No card found\n");
return PTR_ERR(dev_macsonic);
}
return 0;
}
void
cleanup_module(void)
{
unregister_netdev(dev_macsonic);
kfree(dev_macsonic->priv);
free_netdev(dev_macsonic);
}
#endif /* MODULE */
#define vdma_alloc(foo, bar) ((u32)foo)
#define vdma_free(baz)
#define sonic_chiptomem(bat) (bat)
#define PHYSADDR(quux) (quux)
#define CPHYSADDR(quux) (quux)
#define sonic_request_irq request_irq
#define sonic_free_irq free_irq
#include "sonic.c"
/*
* Local variables:
* compile-command: "m68k-linux-gcc -D__KERNEL__ -I../../include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -pipe -fno-strength-reduce -ffixed-a2 -DMODULE -DMODVERSIONS -include ../../include/linux/modversions.h -c -o macsonic.o macsonic.c"
* version-control: t
* kept-new-versions: 5
* c-indent-level: 8
* tab-width: 8
* End:
*
*/
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