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path: root/drivers/net/jazzsonic.c
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Diffstat (limited to 'drivers/net/jazzsonic.c')
-rw-r--r--drivers/net/jazzsonic.c381
1 files changed, 381 insertions, 0 deletions
diff --git a/drivers/net/jazzsonic.c b/drivers/net/jazzsonic.c
new file mode 100644
index 000000000000..7fec613e1675
--- /dev/null
+++ b/drivers/net/jazzsonic.c
@@ -0,0 +1,381 @@
+/*
+ * 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/module.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 <linux/bitops.h>
+#include <linux/device.h>
+
+#include <asm/bootinfo.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/jazz.h>
+#include <asm/jazzdma.h>
+
+static char jazz_sonic_string[] = "jazzsonic";
+static struct platform_device *jazz_sonic_device;
+
+#define SONIC_MEM_SIZE 0x100
+
+#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); \
+} while (0)
+
+
+/* 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 */
+};
+
+static int __init sonic_probe1(struct net_device *dev, unsigned long base_addr,
+ unsigned int irq)
+{
+ static unsigned version_printed;
+ unsigned int silicon_revision;
+ unsigned int val;
+ struct sonic_local *lp;
+ int err = -ENODEV;
+ int i;
+
+ if (!request_mem_region(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);
+ 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);
+ goto out;
+ }
+
+ 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);
+
+ err = -ENOMEM;
+
+ /* 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);
+ goto out;
+ }
+
+ memset(lp, 0, sizeof(struct sonic_local));
+
+ /* get the virtual dma address */
+ lp->cda_laddr = vdma_alloc(CPHYSADDR(lp),sizeof(*lp));
+ if (lp->cda_laddr == ~0UL) {
+ printk("%s: couldn't get DMA page entry for "
+ "descriptors\n", dev->name);
+ goto out1;
+ }
+
+ 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);
+ goto out2;
+ }
+
+ /* get virtual dma address */
+ lp->rba_laddr = vdma_alloc(CPHYSADDR(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);
+ goto out3;
+ }
+
+ /* 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);
+
+ return 0;
+out3:
+ kfree(lp->rba);
+out2:
+ vdma_free(lp->cda_laddr);
+out1:
+ kfree(lp);
+out:
+ release_region(base_addr, SONIC_MEM_SIZE);
+ return err;
+}
+
+/*
+ * Probe for a SONIC ethernet controller on a Mips Jazz board.
+ * Actually probing is superfluous but we're paranoid.
+ */
+static int __init jazz_sonic_probe(struct device *device)
+{
+ struct net_device *dev;
+ struct sonic_local *lp;
+ unsigned long base_addr;
+ int err = 0;
+ int i;
+
+ /*
+ * Don't probe if we're not running on a Jazz board.
+ */
+ if (mips_machgroup != MACH_GROUP_JAZZ)
+ return -ENODEV;
+
+ dev = alloc_etherdev(0);
+ if (!dev)
+ return -ENOMEM;
+
+ netdev_boot_setup_check(dev);
+ base_addr = dev->base_addr;
+
+ if (base_addr >= KSEG0) { /* Check a single specified location. */
+ err = sonic_probe1(dev, base_addr, dev->irq);
+ } else if (base_addr != 0) { /* Don't probe at all. */
+ err = -ENXIO;
+ } else {
+ for (i = 0; sonic_portlist[i].port; i++) {
+ int io = sonic_portlist[i].port;
+ if (sonic_probe1(dev, io, sonic_portlist[i].irq) == 0)
+ break;
+ }
+ if (!sonic_portlist[i].port)
+ err = -ENODEV;
+ }
+ if (err)
+ goto out;
+ err = register_netdev(dev);
+ if (err)
+ goto out1;
+
+ return 0;
+
+out1:
+ lp = dev->priv;
+ vdma_free(lp->rba_laddr);
+ kfree(lp->rba);
+ vdma_free(lp->cda_laddr);
+ kfree(lp);
+ release_region(dev->base_addr, SONIC_MEM_SIZE);
+out:
+ free_netdev(dev);
+
+ return err;
+}
+
+/*
+ * 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"
+
+static int __devexit jazz_sonic_device_remove (struct device *device)
+{
+ struct net_device *dev = device->driver_data;
+
+ unregister_netdev (dev);
+ release_region (dev->base_addr, SONIC_MEM_SIZE);
+ free_netdev (dev);
+
+ return 0;
+}
+
+static struct device_driver jazz_sonic_driver = {
+ .name = jazz_sonic_string,
+ .bus = &platform_bus_type,
+ .probe = jazz_sonic_probe,
+ .remove = __devexit_p(jazz_sonic_device_remove),
+};
+
+static void jazz_sonic_platform_release (struct device *device)
+{
+ struct platform_device *pldev;
+
+ /* free device */
+ pldev = to_platform_device (device);
+ kfree (pldev);
+}
+
+static int __init jazz_sonic_init_module(void)
+{
+ struct platform_device *pldev;
+
+ if (driver_register(&jazz_sonic_driver)) {
+ printk(KERN_ERR "Driver registration failed\n");
+ return -ENOMEM;
+ }
+
+ jazz_sonic_device = NULL;
+
+ if (!(pldev = kmalloc (sizeof (*pldev), GFP_KERNEL))) {
+ goto out_unregister;
+ }
+
+ memset(pldev, 0, sizeof (*pldev));
+ pldev->name = jazz_sonic_string;
+ pldev->id = 0;
+ pldev->dev.release = jazz_sonic_platform_release;
+ jazz_sonic_device = pldev;
+
+ if (platform_device_register (pldev)) {
+ kfree(pldev);
+ jazz_sonic_device = NULL;
+ }
+
+ return 0;
+
+out_unregister:
+ platform_device_unregister(pldev);
+
+ return -ENOMEM;
+}
+
+static void __exit jazz_sonic_cleanup_module(void)
+{
+ driver_unregister(&jazz_sonic_driver);
+
+ if (jazz_sonic_device) {
+ platform_device_unregister(jazz_sonic_device);
+ jazz_sonic_device = NULL;
+ }
+}
+
+module_init(jazz_sonic_init_module);
+module_exit(jazz_sonic_cleanup_module);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.