// SPDX-License-Identifier: GPL-2.0 /* * jazzsonic.c * * (C) 2005 Finn Thain * * Converted to DMA API, and (from the mac68k project) introduced * dhd's support for 16-bit cards. * * (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)
*/
/* * Macros to access SONIC registers
*/ #define SONIC_READ(reg) (*((volatileunsignedint *)dev->base_addr+reg))
#define SONIC_WRITE(reg,val) \ do { \
*((volatileunsignedint *)dev->base_addr+(reg)) = (val); \
} while (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.
*/ staticunsignedshort known_revisions[] =
{
0x04, /* Mips Magnum 4000 */
0xffff /* end of list */
};
staticint jazzsonic_open(struct net_device* dev)
{ int retval;
retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev); if (retval) {
printk(KERN_ERR "%s: unable to get IRQ %d.\n",
dev->name, dev->irq); return retval;
}
retval = sonic_open(dev); if (retval)
free_irq(dev->irq, dev); return retval;
}
if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string)) return -EBUSY;
/* * 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);
i = 0; while (known_revisions[i] != 0xffff &&
known_revisions[i] != silicon_revision)
i++;
if (known_revisions[i] == 0xffff) {
pr_info("SONIC ethernet controller not found (0x%4x)\n",
silicon_revision); goto out;
}
/* * 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);
addr[i*2] = val;
addr[i*2+1] = val >> 8;
}
eth_hw_addr_set(dev, addr);
lp->dma_bitmode = SONIC_BITMODE32;
err = sonic_alloc_descriptors(dev); if (err) goto out;
/* * Probe for a SONIC ethernet controller on a Mips Jazz board. * Actually probing is superfluous but we're paranoid.
*/ staticint jazz_sonic_probe(struct platform_device *pdev)
{ struct net_device *dev; struct sonic_local *lp; struct resource *res; int err = 0;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -ENODEV;
dev = alloc_etherdev(sizeof(struct sonic_local)); if (!dev) return -ENOMEM;
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