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/*
* sonic.c
*
* (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.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 onboard Sonic ethernet controller on Mips Jazz
* systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and
* perhaps others, too)
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ptrace.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 <asm/bootinfo.h>
#include <asm/system.h>
#include <asm/bitops.h>
#include <asm/pgtable.h>
#include <asm/segment.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/jazz.h>
#include <asm/jazzdma.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#define SREGS_PAD(n) u16 n;
#include "sonic.h"
/*
* Macros to access SONIC registers
*/
#define SONIC_READ(reg) \
*((volatile unsigned int *)base_addr+reg)
#define SONIC_WRITE(reg,val) \
*((volatile unsigned int *)base_addr+reg) = val
/* use 0 for production, 1 for verification, >2 for debug */
#ifdef SONIC_DEBUG
static unsigned int sonic_debug = SONIC_DEBUG;
#else
static unsigned int sonic_debug = 1;
#endif
/*
* Base address and interrupt of the SONIC controller on JAZZ boards
*/
static struct {
unsigned int port;
unsigned int irq;
} sonic_portlist[] = { {JAZZ_ETHERNET_BASE, JAZZ_ETHERNET_IRQ}, {0, 0}};
/*
* We cannot use station (ethernet) address prefixes to detect the
* sonic controller since these are board manufacturer depended.
* So we check for known Silicon Revision IDs instead.
*/
static unsigned short known_revisions[] =
{
0x04, /* Mips Magnum 4000 */
0xffff /* end of list */
};
/* Index to functions, as function prototypes. */
extern int sonic_probe(struct net_device *dev);
static int sonic_probe1(struct net_device *dev, unsigned int base_addr, unsigned int irq);
/*
* Probe for a SONIC ethernet controller on a Mips Jazz board.
* Actually probing is superfluous but we're paranoid.
*/
int __init sonic_probe(struct net_device *dev)
{
unsigned int base_addr = dev ? dev->base_addr : 0;
int i;
/*
* Don't probe if we're not running on a Jazz board.
*/
if (mips_machgroup != MACH_GROUP_JAZZ)
return -ENODEV;
if (base_addr >= KSEG0) /* Check a single specified location. */
return sonic_probe1(dev, base_addr, dev->irq);
else if (base_addr != 0) /* Don't probe at all. */
return -ENXIO;
for (i = 0; sonic_portlist[i].port; i++) {
int base_addr = sonic_portlist[i].port;
if (check_region(base_addr, 0x100))
continue;
if (sonic_probe1(dev, base_addr, sonic_portlist[i].irq) == 0)
return 0;
}
return -ENODEV;
}
static int __init sonic_probe1(struct net_device *dev,
unsigned int base_addr, unsigned int irq)
{
static unsigned version_printed = 0;
unsigned int silicon_revision;
unsigned int val;
struct sonic_local *lp;
int i;
/*
* get the Silicon Revision ID. If this is one of the known
* one assume that we found a SONIC ethernet controller at
* the expected location.
*/
silicon_revision = SONIC_READ(SONIC_SR);
if (sonic_debug > 1)
printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
i = 0;
while ((known_revisions[i] != 0xffff) &&
(known_revisions[i] != silicon_revision))
i++;
if (known_revisions[i] == 0xffff) {
printk("SONIC ethernet controller not found (0x%4x)\n",
silicon_revision);
return -ENODEV;
}
if (!request_region(base_addr, 0x100, dev->name))
return -EBUSY;
if (sonic_debug && version_printed++ == 0)
printk(version);
printk("%s: %s found at 0x%08x, ",
dev->name, "SONIC ethernet", base_addr);
/* Fill in the 'dev' fields. */
dev->base_addr = base_addr;
dev->irq = irq;
/*
* Put the sonic into software reset, then
* retrieve and print the ethernet address.
*/
SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
SONIC_WRITE(SONIC_CEP,0);
for (i=0; i<3; i++) {
val = SONIC_READ(SONIC_CAP0-i);
dev->dev_addr[i*2] = val;
dev->dev_addr[i*2+1] = val >> 8;
}
printk("HW Address ");
for (i = 0; i < 6; i++) {
printk("%2.2x", dev->dev_addr[i]);
if (i<5)
printk(":");
}
printk(" IRQ %d\n", irq);
/* Initialize the device structure. */
if (dev->priv == NULL) {
/*
* the memory be located in the same 64kb segment
*/
lp = NULL;
i = 0;
do {
lp = (struct sonic_local *)kmalloc(sizeof(*lp), GFP_KERNEL);
if ((unsigned long)lp >> 16 != ((unsigned long)lp + sizeof(*lp) ) >> 16) {
/* FIXME, free the memory later */
kfree (lp);
lp = NULL;
}
} while (lp == NULL && i++ < 20);
if (lp == NULL) {
printk ("%s: couldn't allocate memory for descriptors\n",
dev->name);
return -ENOMEM;
}
memset(lp, 0, sizeof(struct sonic_local));
/* get the virtual dma address */
lp->cda_laddr = vdma_alloc(PHYSADDR(lp),sizeof(*lp));
if (lp->cda_laddr == ~0UL) {
printk ("%s: couldn't get DMA page entry for descriptors\n",
dev->name);
return -ENOMEM;
}
lp->tda_laddr = lp->cda_laddr + sizeof (lp->cda);
lp->rra_laddr = lp->tda_laddr + sizeof (lp->tda);
lp->rda_laddr = lp->rra_laddr + sizeof (lp->rra);
/* allocate receive buffer area */
/* FIXME, maybe we should use skbs */
if ((lp->rba = (char *)kmalloc(SONIC_NUM_RRS * SONIC_RBSIZE, GFP_KERNEL)) == NULL) {
printk ("%s: couldn't allocate receive buffers\n",dev->name);
return -ENOMEM;
}
/* get virtual dma address */
if ((lp->rba_laddr = vdma_alloc(PHYSADDR(lp->rba),SONIC_NUM_RRS * SONIC_RBSIZE)) == ~0UL) {
printk ("%s: couldn't get DMA page entry for receive buffers\n",dev->name);
return -ENOMEM;
}
/* now convert pointer to KSEG1 pointer */
lp->rba = (char *)KSEG1ADDR(lp->rba);
flush_cache_all();
dev->priv = (struct sonic_local *)KSEG1ADDR(lp);
}
lp = (struct sonic_local *)dev->priv;
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(SONIC_CRCT,0xffff);
SONIC_WRITE(SONIC_FAET,0xffff);
SONIC_WRITE(SONIC_MPT,0xffff);
/* Fill in the fields of the device structure with ethernet values. */
ether_setup(dev);
return 0;
}
/*
* SONIC uses a normal IRQ
*/
#define sonic_request_irq request_irq
#define sonic_free_irq free_irq
#define sonic_chiptomem(x) KSEG1ADDR(vdma_log2phys(x))
#include "sonic.c"
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