1 files changed, 238 insertions, 0 deletions

diff --git a/drivers/net/ethernet/i825xx/lasi_82596.c b/drivers/net/ethernet/i825xx/lasi_82596.c
new file mode 100644
index 000000000000..6eba352c52e0
--- /dev/null
+++ b/drivers/net/ethernet/i825xx/lasi_82596.c
@@ -0,0 +1,238 @@
+/* lasi_82596.c -- driver for the intel 82596 ethernet controller, as
+   munged into HPPA boxen .
+
+   This driver is based upon 82596.c, original credits are below...
+   but there were too many hoops which HP wants jumped through to
+   keep this code in there in a sane manner.
+
+   3 primary sources of the mess --
+   1) hppa needs *lots* of cacheline flushing to keep this kind of
+   MMIO running.
+
+   2) The 82596 needs to see all of its pointers as their physical
+   address.  Thus virt_to_bus/bus_to_virt are *everywhere*.
+
+   3) The implementation HP is using seems to be significantly pickier
+   about when and how the command and RX units are started.  some
+   command ordering was changed.
+
+   Examination of the mach driver leads one to believe that there
+   might be a saner way to pull this off...  anyone who feels like a
+   full rewrite can be my guest.
+
+   Split 02/13/2000 Sam Creasey (sammy@oh.verio.com)
+
+   02/01/2000  Initial modifications for parisc by Helge Deller (deller@gmx.de)
+   03/02/2000  changes for better/correct(?) cache-flushing (deller)
+*/
+
+/* 82596.c: A generic 82596 ethernet driver for linux. */
+/*
+   Based on Apricot.c
+   Written 1994 by Mark Evans.
+   This driver is for the Apricot 82596 bus-master interface
+
+   Modularised 12/94 Mark Evans
+
+
+   Modified to support the 82596 ethernet chips on 680x0 VME boards.
+   by Richard Hirst <richard@sleepie.demon.co.uk>
+   Renamed to be 82596.c
+
+   980825:  Changed to receive directly in to sk_buffs which are
+   allocated at open() time.  Eliminates copy on incoming frames
+   (small ones are still copied).  Shared data now held in a
+   non-cached page, so we can run on 68060 in copyback mode.
+
+   TBD:
+   * look at deferring rx frames rather than discarding (as per tulip)
+   * handle tx ring full as per tulip
+   * performance test to tune rx_copybreak
+
+   Most of my modifications relate to the braindead big-endian
+   implementation by Intel.  When the i596 is operating in
+   'big-endian' mode, it thinks a 32 bit value of 0x12345678
+   should be stored as 0x56781234.  This is a real pain, when
+   you have linked lists which are shared by the 680x0 and the
+   i596.
+
+   Driver skeleton
+   Written 1993 by Donald Becker.
+   Copyright 1993 United States Government as represented by the Director,
+   National Security Agency. This software may only be used and distributed
+   according to the terms of the GNU General Public License as modified by SRC,
+   incorporated herein by reference.
+
+   The author may be reached as becker@scyld.com, or C/O
+   Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
+
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/pdc.h>
+#include <asm/parisc-device.h>
+
+#define LASI_82596_DRIVER_VERSION "LASI 82596 driver - Revision: 1.30"
+
+#define PA_I82596_RESET         0       /* Offsets relative to LASI-LAN-Addr.*/
+#define PA_CPU_PORT_L_ACCESS    4
+#define PA_CHANNEL_ATTENTION    8
+
+#define OPT_SWAP_PORT   0x0001  /* Need to wordswp on the MPU port */
+
+#define DMA_ALLOC                        dma_alloc_noncoherent
+#define DMA_FREE                         dma_free_noncoherent
+#define DMA_WBACK(ndev, addr, len) \
+        do { dma_cache_sync((ndev)->dev.parent, (void *)addr, len, DMA_TO_DEVICE); } while (0)
+
+#define DMA_INV(ndev, addr, len) \
+        do { dma_cache_sync((ndev)->dev.parent, (void *)addr, len, DMA_FROM_DEVICE); } while (0)
+
+#define DMA_WBACK_INV(ndev, addr, len) \
+        do { dma_cache_sync((ndev)->dev.parent, (void *)addr, len, DMA_BIDIRECTIONAL); } while (0)
+
+#define SYSBUS      0x0000006c;
+
+/* big endian CPU, 82596 "big" endian mode */
+#define SWAP32(x)   (((u32)(x)<<16) | ((((u32)(x)))>>16))
+#define SWAP16(x)   (x)
+
+#include "lib82596.c"
+
+MODULE_AUTHOR("Richard Hirst");
+MODULE_DESCRIPTION("i82596 driver");
+MODULE_LICENSE("GPL");
+module_param(i596_debug, int, 0);
+MODULE_PARM_DESC(i596_debug, "lasi_82596 debug mask");
+
+static inline void ca(struct net_device *dev)
+{
+        gsc_writel(0, dev->base_addr + PA_CHANNEL_ATTENTION);
+}
+
+
+static void mpu_port(struct net_device *dev, int c, dma_addr_t x)
+{
+        struct i596_private *lp = netdev_priv(dev);
+
+        u32 v = (u32) (c) | (u32) (x);
+        u16 a, b;
+
+        if (lp->options & OPT_SWAP_PORT) {
+                a = v >> 16;
+                b = v & 0xffff;
+        } else {
+                a = v & 0xffff;
+                b = v >> 16;
+        }
+
+        gsc_writel(a, dev->base_addr + PA_CPU_PORT_L_ACCESS);
+        udelay(1);
+        gsc_writel(b, dev->base_addr + PA_CPU_PORT_L_ACCESS);
+}
+
+#define LAN_PROM_ADDR   0xF0810000
+
+static int __devinit
+lan_init_chip(struct parisc_device *dev)
+{
+        struct  net_device *netdevice;
+        struct i596_private *lp;
+        int     retval;
+        int i;
+
+        if (!dev->irq) {
+                printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
+                        __FILE__, (unsigned long)dev->hpa.start);
+                return -ENODEV;
+        }
+
+        printk(KERN_INFO "Found i82596 at 0x%lx, IRQ %d\n",
+                        (unsigned long)dev->hpa.start, dev->irq);
+
+        netdevice = alloc_etherdev(sizeof(struct i596_private));
+        if (!netdevice)
+                return -ENOMEM;
+        SET_NETDEV_DEV(netdevice, &dev->dev);
+        parisc_set_drvdata (dev, netdevice);
+
+        netdevice->base_addr = dev->hpa.start;
+        netdevice->irq = dev->irq;
+
+        if (pdc_lan_station_id(netdevice->dev_addr, netdevice->base_addr)) {
+                for (i = 0; i < 6; i++) {
+                        netdevice->dev_addr[i] = gsc_readb(LAN_PROM_ADDR + i);
+                }
+                printk(KERN_INFO
+                       "%s: MAC of HP700 LAN read from EEPROM\n", __FILE__);
+        }
+
+        lp = netdev_priv(netdevice);
+        lp->options = dev->id.sversion == 0x72 ? OPT_SWAP_PORT : 0;
+
+        retval = i82596_probe(netdevice);
+        if (retval) {
+                free_netdev(netdevice);
+                return -ENODEV;
+        }
+        return retval;
+}
+
+static int __devexit lan_remove_chip (struct parisc_device *pdev)
+{
+        struct net_device *dev = parisc_get_drvdata(pdev);
+        struct i596_private *lp = netdev_priv(dev);
+
+        unregister_netdev (dev);
+        DMA_FREE(&pdev->dev, sizeof(struct i596_private),
+                 (void *)lp->dma, lp->dma_addr);
+        free_netdev (dev);
+        return 0;
+}
+
+static struct parisc_device_id lan_tbl[] = {
+        { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008a },
+        { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00072 },
+        { 0, }
+};
+
+MODULE_DEVICE_TABLE(parisc, lan_tbl);
+
+static struct parisc_driver lan_driver = {
+        .name           = "lasi_82596",
+        .id_table       = lan_tbl,
+        .probe          = lan_init_chip,
+        .remove         = __devexit_p(lan_remove_chip),
+};
+
+static int __devinit lasi_82596_init(void)
+{
+        printk(KERN_INFO LASI_82596_DRIVER_VERSION "\n");
+        return register_parisc_driver(&lan_driver);
+}
+
+module_init(lasi_82596_init);
+
+static void __exit lasi_82596_exit(void)
+{
+        unregister_parisc_driver(&lan_driver);
+}
+
+module_exit(lasi_82596_exit);