jazzsonic.c
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上传日期:2013-02-24
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文件大小:7k
- /*
- * 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)
- 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%04xn",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 %dn", 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 descriptorsn",
- 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 "
- "descriptorsn", 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 buffersn",
- 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 "
- "buffersn",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"