patch-2.3.9 linux/drivers/net/jazzsonic.c

• Lines: 267
• Date: Fri Jun 25 17:39:52 1999
• Orig file: v2.3.8/linux/drivers/net/jazzsonic.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.8/linux/drivers/net/jazzsonic.c linux/drivers/net/jazzsonic.c
@@ -0,0 +1,266 @@
+/*
+ * 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/malloc.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 interupt 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 device *dev);
+static int sonic_probe1(struct 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.
+ */
+__initfunc(int sonic_probe(struct 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;
+}
+
+__initfunc(static int sonic_probe1(struct 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;
+    }
+    
+    request_region(base_addr, 0x100, "SONIC");
+    
+    /* Allocate a new 'dev' if needed. */
+    if (dev == NULL)
+      dev = init_etherdev(0, sizeof(struct sonic_local));
+
+    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"