--- /dev/null
+/* hplance.c : the Linux/hp300/lance ethernet driver
+ *
+ * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
+ * Based on the Sun Lance driver and the NetBSD HP Lance driver
+ * Uses the generic 7990.c LANCE code.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+/* Used for the temporal inet entries and routing */
+#include <linux/socket.h>
+#include <linux/route.h>
+#include <linux/dio.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+
+#include <asm/io.h>
+#include <asm/pgtable.h>
+
+#include "hplance.h"
+
+/* We have 16392 bytes of RAM for the init block and buffers. This places
+ * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
+ * buffers and 2 Tx buffers, it takes (8 + 2) * 1544 bytes.
+ */
+#define LANCE_LOG_TX_BUFFERS 1
+#define LANCE_LOG_RX_BUFFERS 3
+
+#include "7990.h" /* use generic LANCE code */
+
+/* Our private data structure */
+struct hplance_private {
+ struct lance_private lance;
+};
+
+/* function prototypes... This is easy because all the grot is in the
+ * generic LANCE support. All we have to support is probing for boards,
+ * plus board-specific init, open and close actions.
+ * Oh, and we need to tell the generic code how to read and write LANCE registers...
+ */
+static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent);
+static void hplance_init(struct net_device *dev, struct dio_dev *d);
+static void hplance_remove_one(struct dio_dev *d);
+static void hplance_writerap(void *priv, unsigned short value);
+static void hplance_writerdp(void *priv, unsigned short value);
+static unsigned short hplance_readrdp(void *priv);
+static int hplance_open(struct net_device *dev);
+static int hplance_close(struct net_device *dev);
+
+static struct dio_device_id hplance_dio_tbl[] = {
+ { DIO_ID_LAN },
+ { 0 }
+};
+
+static struct dio_driver hplance_driver = {
+ .name = "hplance",
+ .id_table = hplance_dio_tbl,
+ .probe = hplance_init_one,
+ .remove = hplance_remove_one,
+};
+
+static const struct net_device_ops hplance_netdev_ops = {
+ .ndo_open = hplance_open,
+ .ndo_stop = hplance_close,
+ .ndo_start_xmit = lance_start_xmit,
+ .ndo_set_rx_mode = lance_set_multicast,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = eth_mac_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = lance_poll,
+#endif
+};
+
+/* Find all the HP Lance boards and initialise them... */
+static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent)
+{
+ struct net_device *dev;
+ int err = -ENOMEM;
+
+ dev = alloc_etherdev(sizeof(struct hplance_private));
+ if (!dev)
+ goto out;
+
+ err = -EBUSY;
+ if (!request_mem_region(dio_resource_start(d),
+ dio_resource_len(d), d->name))
+ goto out_free_netdev;
+
+ hplance_init(dev, d);
+ err = register_netdev(dev);
+ if (err)
+ goto out_release_mem_region;
+
+ dio_set_drvdata(d, dev);
+
+ printk(KERN_INFO "%s: %s; select code %d, addr %pM, irq %d\n",
+ dev->name, d->name, d->scode, dev->dev_addr, d->ipl);
+
+ return 0;
+
+ out_release_mem_region:
+ release_mem_region(dio_resource_start(d), dio_resource_len(d));
+ out_free_netdev:
+ free_netdev(dev);
+ out:
+ return err;
+}
+
+static void hplance_remove_one(struct dio_dev *d)
+{
+ struct net_device *dev = dio_get_drvdata(d);
+
+ unregister_netdev(dev);
+ release_mem_region(dio_resource_start(d), dio_resource_len(d));
+ free_netdev(dev);
+}
+
+/* Initialise a single lance board at the given DIO device */
+static void hplance_init(struct net_device *dev, struct dio_dev *d)
+{
+ unsigned long va = (d->resource.start + DIO_VIRADDRBASE);
+ struct hplance_private *lp;
+ int i;
+
+ /* reset the board */
+ out_8(va + DIO_IDOFF, 0xff);
+ udelay(100); /* ariba! ariba! udelay! udelay! */
+
+ /* Fill the dev fields */
+ dev->base_addr = va;
+ dev->netdev_ops = &hplance_netdev_ops;
+ dev->dma = 0;
+
+ for (i = 0; i < 6; i++) {
+ /* The NVRAM holds our ethernet address, one nibble per byte,
+ * at bytes NVRAMOFF+1,3,5,7,9...
+ */
+ dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)
+ | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);
+ }
+
+ lp = netdev_priv(dev);
+ lp->lance.name = d->name;
+ lp->lance.base = va;
+ lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */
+ lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */
+ lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */
+ lp->lance.irq = d->ipl;
+ lp->lance.writerap = hplance_writerap;
+ lp->lance.writerdp = hplance_writerdp;
+ lp->lance.readrdp = hplance_readrdp;
+ lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
+ lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
+ lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
+ lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
+}
+
+/* This is disgusting. We have to check the DIO status register for ack every
+ * time we read or write the LANCE registers.
+ */
+static void hplance_writerap(void *priv, unsigned short value)
+{
+ struct lance_private *lp = (struct lance_private *)priv;
+ do {
+ out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
+ } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
+}
+
+static void hplance_writerdp(void *priv, unsigned short value)
+{
+ struct lance_private *lp = (struct lance_private *)priv;
+ do {
+ out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
+ } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
+}
+
+static unsigned short hplance_readrdp(void *priv)
+{
+ struct lance_private *lp = (struct lance_private *)priv;
+ __u16 value;
+ do {
+ value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
+ } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
+ return value;
+}
+
+static int hplance_open(struct net_device *dev)
+{
+ int status;
+ struct lance_private *lp = netdev_priv(dev);
+
+ status = lance_open(dev); /* call generic lance open code */
+ if (status)
+ return status;
+ /* enable interrupts at board level. */
+ out_8(lp->base + HPLANCE_STATUS, LE_IE);
+
+ return 0;
+}
+
+static int hplance_close(struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+
+ out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */
+ lance_close(dev);
+ return 0;
+}
+
+static int __init hplance_init_module(void)
+{
+ return dio_register_driver(&hplance_driver);
+}
+
+static void __exit hplance_cleanup_module(void)
+{
+ dio_unregister_driver(&hplance_driver);
+}
+
+module_init(hplance_init_module);
+module_exit(hplance_cleanup_module);
+
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff