1 files changed, 308 insertions, 0 deletions
diff --git a/drivers/net/ethernet/natsemi/jazzsonic.c b/drivers/net/ethernet/natsemi/jazzsonic.c
new file mode 100644
index 000000000000..fc7c6a932ad9
--- /dev/null
+++ b/drivers/net/ethernet/natsemi/jazzsonic.c
@@ -0,0 +1,308 @@
+/*
+ * jazzsonic.c
+ *
+ * (C) 2005 Finn Thain
+ *
+ * Converted to DMA API, and (from the mac68k project) introduced
+ * dhd's support for 16-bit cards.
+ *
+ * (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/gfp.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/in.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/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.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";
+
+#define SONIC_MEM_SIZE	0x100
+
+#include "sonic.h"
+
+/*
+ * Macros to access SONIC registers
+ */
+#define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg))
+
+#define SONIC_WRITE(reg,val)						\
+do {									\
+	*((volatile unsigned int *)dev->base_addr+(reg)) = (val);		\
+} while (0)
+
+
+/* use 0 for production, 1 for verification, >1 for debug */
+#ifdef SONIC_DEBUG
+static unsigned int sonic_debug = SONIC_DEBUG;
+#else
+static unsigned int sonic_debug = 1;
+#endif
+
+/*
+ * 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 jazzsonic_open(struct net_device* dev)
+{
+	int retval;
+
+	retval = request_irq(dev->irq, sonic_interrupt, IRQF_DISABLED,
+				"sonic", dev);
+	if (retval) {
+		printk(KERN_ERR "%s: unable to get IRQ %d.\n",
+				dev->name, dev->irq);
+		return retval;
+	}
+
+	retval = sonic_open(dev);
+	if (retval)
+		free_irq(dev->irq, dev);
+	return retval;
+}
+
+static int jazzsonic_close(struct net_device* dev)
+{
+	int err;
+	err = sonic_close(dev);
+	free_irq(dev->irq, dev);
+	return err;
+}
+
+static const struct net_device_ops sonic_netdev_ops = {
+	.ndo_open		= jazzsonic_open,
+	.ndo_stop		= jazzsonic_close,
+	.ndo_start_xmit		= sonic_send_packet,
+	.ndo_get_stats		= sonic_get_stats,
+	.ndo_set_rx_mode	= sonic_multicast_list,
+	.ndo_tx_timeout		= sonic_tx_timeout,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_set_mac_address	= eth_mac_addr,
+};
+
+static int __devinit sonic_probe1(struct net_device *dev)
+{
+	static unsigned version_printed;
+	unsigned int silicon_revision;
+	unsigned int val;
+	struct sonic_local *lp = netdev_priv(dev);
+	int err = -ENODEV;
+	int i;
+
+	if (!request_mem_region(dev->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(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ",
+	       dev_name(lp->device), dev->base_addr);
+
+	/*
+	 * 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;
+	}
+
+	err = -ENOMEM;
+
+	/* Initialize the device structure. */
+
+	lp->dma_bitmode = SONIC_BITMODE32;
+
+	/* Allocate the entire chunk of memory for the descriptors.
+           Note that this cannot cross a 64K boundary. */
+	if ((lp->descriptors = dma_alloc_coherent(lp->device,
+				SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
+				&lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
+		printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n",
+		       dev_name(lp->device));
+		goto out;
+	}
+
+	/* Now set up the pointers to point to the appropriate places */
+	lp->cda = lp->descriptors;
+	lp->tda = lp->cda + (SIZEOF_SONIC_CDA
+	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
+	lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
+	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
+	lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
+	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
+
+	lp->cda_laddr = lp->descriptors_laddr;
+	lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
+	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
+	lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
+	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
+	lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
+	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
+
+	dev->netdev_ops = &sonic_netdev_ops;
+	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;
+out:
+	release_mem_region(dev->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 __devinit jazz_sonic_probe(struct platform_device *pdev)
+{
+	struct net_device *dev;
+	struct sonic_local *lp;
+	struct resource *res;
+	int err = 0;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+
+	dev = alloc_etherdev(sizeof(struct sonic_local));
+	if (!dev)
+		return -ENOMEM;
+
+	lp = netdev_priv(dev);
+	lp->device = &pdev->dev;
+	SET_NETDEV_DEV(dev, &pdev->dev);
+	platform_set_drvdata(pdev, dev);
+
+	netdev_boot_setup_check(dev);
+
+	dev->base_addr = res->start;
+	dev->irq = platform_get_irq(pdev, 0);
+	err = sonic_probe1(dev);
+	if (err)
+		goto out;
+	err = register_netdev(dev);
+	if (err)
+		goto out1;
+
+	printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
+
+	return 0;
+
+out1:
+	release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
+out:
+	free_netdev(dev);
+
+	return err;
+}
+
+MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
+module_param(sonic_debug, int, 0);
+MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
+MODULE_ALIAS("platform:jazzsonic");
+
+#include "sonic.c"
+
+static int __devexit jazz_sonic_device_remove (struct platform_device *pdev)
+{
+	struct net_device *dev = platform_get_drvdata(pdev);
+	struct sonic_local* lp = netdev_priv(dev);
+
+	unregister_netdev(dev);
+	dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
+	                  lp->descriptors, lp->descriptors_laddr);
+	release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
+	free_netdev(dev);
+
+	return 0;
+}
+
+static struct platform_driver jazz_sonic_driver = {
+	.probe	= jazz_sonic_probe,
+	.remove	= __devexit_p(jazz_sonic_device_remove),
+	.driver	= {
+		.name	= jazz_sonic_string,
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init jazz_sonic_init_module(void)
+{
+	return platform_driver_register(&jazz_sonic_driver);
+}
+
+static void __exit jazz_sonic_cleanup_module(void)
+{
+	platform_driver_unregister(&jazz_sonic_driver);
+}
+
+module_init(jazz_sonic_init_module);
+module_exit(jazz_sonic_cleanup_module);