/* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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"