| /* |
| * 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/types.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/errno.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| |
| #include <asm/bootinfo.h> |
| #include <asm/system.h> |
| #include <asm/bitops.h> |
| #include <asm/pgtable.h> |
| #include <asm/io.h> |
| #include <asm/dma.h> |
| #include <asm/jazz.h> |
| #include <asm/jazzdma.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) \ |
| do { \ |
| *((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; |
| 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: Sonic ethernet found at 0x%08lx, ", dev->name, 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 = 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 */ |
| lp->rba = kmalloc(SONIC_NUM_RRS * SONIC_RBSIZE, GFP_KERNEL); |
| if (!lp->rba) { |
| printk("%s: couldn't allocate receive buffers\n", |
| dev->name); |
| return -ENOMEM; |
| } |
| |
| /* get virtual dma address */ |
| lp->rba_laddr = vdma_alloc(PHYSADDR(lp->rba), |
| SONIC_NUM_RRS * SONIC_RBSIZE); |
| if (lp->rba_laddr == ~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; |
| dev->watchdog_timeo = TX_TIMEOUT; |
| |
| /* |
| * 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" |