1 files changed, 368 insertions, 0 deletions

diff --git a/drivers/net/arcnet/arc-rimi.c b/drivers/net/arcnet/arc-rimi.c
new file mode 100644
index 000000000000..38c3f033f739
--- /dev/null
+++ b/drivers/net/arcnet/arc-rimi.c
@@ -0,0 +1,368 @@
+/*
+ * Linux ARCnet driver - "RIM I" (entirely mem-mapped) cards
+ * 
+ * Written 1994-1999 by Avery Pennarun.
+ * Written 1999-2000 by Martin Mares <mj@ucw.cz>.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ *  for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c 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.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/bootmem.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <linux/arcdevice.h>
+
+
+#define VERSION "arcnet: RIM I (entirely mem-mapped) support\n"
+
+
+/* Internal function declarations */
+
+static int arcrimi_probe(struct net_device *dev);
+static int arcrimi_found(struct net_device *dev);
+static void arcrimi_command(struct net_device *dev, int command);
+static int arcrimi_status(struct net_device *dev);
+static void arcrimi_setmask(struct net_device *dev, int mask);
+static int arcrimi_reset(struct net_device *dev, int really_reset);
+static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
+                                 void *buf, int count);
+static void arcrimi_copy_from_card(struct net_device *dev, int bufnum, int offset,
+                                   void *buf, int count);
+
+/* Handy defines for ARCnet specific stuff */
+
+/* Amount of I/O memory used by the card */
+#define BUFFER_SIZE (512)
+#define MIRROR_SIZE (BUFFER_SIZE*4)
+
+/* COM 9026 controller chip --> ARCnet register addresses */
+#define _INTMASK (ioaddr+0)     /* writable */
+#define _STATUS  (ioaddr+0)     /* readable */
+#define _COMMAND (ioaddr+1)     /* writable, returns random vals on read (?) */
+#define _RESET  (ioaddr+8)      /* software reset (on read) */
+#define _MEMDATA  (ioaddr+12)   /* Data port for IO-mapped memory */
+#define _ADDR_HI  (ioaddr+15)   /* Control registers for said */
+#define _ADDR_LO  (ioaddr+14)
+#define _CONFIG  (ioaddr+2)     /* Configuration register */
+
+#undef ASTATUS
+#undef ACOMMAND
+#undef AINTMASK
+
+#define ASTATUS()       readb(_STATUS)
+#define ACOMMAND(cmd)   writeb((cmd),_COMMAND)
+#define AINTMASK(msk)   writeb((msk),_INTMASK)
+#define SETCONF()       writeb(lp->config,_CONFIG)
+
+
+/*
+ * We cannot probe for a RIM I card; one reason is I don't know how to reset
+ * them.  In fact, we can't even get their node ID automatically.  So, we
+ * need to be passed a specific shmem address, IRQ, and node ID.
+ */
+static int __init arcrimi_probe(struct net_device *dev)
+{
+        BUGLVL(D_NORMAL) printk(VERSION);
+        BUGLVL(D_NORMAL) printk("E-mail me if you actually test the RIM I driver, please!\n");
+
+        BUGMSG(D_NORMAL, "Given: node %02Xh, shmem %lXh, irq %d\n",
+               dev->dev_addr[0], dev->mem_start, dev->irq);
+
+        if (dev->mem_start <= 0 || dev->irq <= 0) {
+                BUGMSG(D_NORMAL, "No autoprobe for RIM I; you "
+                       "must specify the shmem and irq!\n");
+                return -ENODEV;
+        }
+        /*
+         * Grab the memory region at mem_start for BUFFER_SIZE bytes.
+         * Later in arcrimi_found() the real size will be determined
+         * and this reserve will be released and the correct size
+         * will be taken.
+         */
+        if (!request_mem_region(dev->mem_start, BUFFER_SIZE, "arcnet (90xx)")) {
+                BUGMSG(D_NORMAL, "Card memory already allocated\n");
+                return -ENODEV;
+        }
+        if (dev->dev_addr[0] == 0) {
+                release_mem_region(dev->mem_start, BUFFER_SIZE);
+                BUGMSG(D_NORMAL, "You need to specify your card's station "
+                       "ID!\n");
+                return -ENODEV;
+        }
+        return arcrimi_found(dev);
+}
+
+
+/*
+ * Set up the struct net_device associated with this card.  Called after
+ * probing succeeds.
+ */
+static int __init arcrimi_found(struct net_device *dev)
+{
+        struct arcnet_local *lp;
+        unsigned long first_mirror, last_mirror, shmem;
+        int mirror_size;
+        int err;
+
+        /* reserve the irq */
+        if (request_irq(dev->irq, &arcnet_interrupt, 0, "arcnet (RIM I)", dev)) {
+                release_mem_region(dev->mem_start, BUFFER_SIZE);
+                BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
+                return -ENODEV;
+        }
+
+        shmem = dev->mem_start;
+        isa_writeb(TESTvalue, shmem);
+        isa_writeb(dev->dev_addr[0], shmem + 1);        /* actually the node ID */
+
+        /* find the real shared memory start/end points, including mirrors */
+
+        /* guess the actual size of one "memory mirror" - the number of
+         * bytes between copies of the shared memory.  On most cards, it's
+         * 2k (or there are no mirrors at all) but on some, it's 4k.
+         */
+        mirror_size = MIRROR_SIZE;
+        if (isa_readb(shmem) == TESTvalue
+            && isa_readb(shmem - mirror_size) != TESTvalue
+            && isa_readb(shmem - 2 * mirror_size) == TESTvalue)
+                mirror_size *= 2;
+
+        first_mirror = last_mirror = shmem;
+        while (isa_readb(first_mirror) == TESTvalue)
+                first_mirror -= mirror_size;
+        first_mirror += mirror_size;
+
+        while (isa_readb(last_mirror) == TESTvalue)
+                last_mirror += mirror_size;
+        last_mirror -= mirror_size;
+
+        dev->mem_start = first_mirror;
+        dev->mem_end = last_mirror + MIRROR_SIZE - 1;
+
+        /* initialize the rest of the device structure. */
+
+        lp = dev->priv;
+        lp->card_name = "RIM I";
+        lp->hw.command = arcrimi_command;
+        lp->hw.status = arcrimi_status;
+        lp->hw.intmask = arcrimi_setmask;
+        lp->hw.reset = arcrimi_reset;
+        lp->hw.owner = THIS_MODULE;
+        lp->hw.copy_to_card = arcrimi_copy_to_card;
+        lp->hw.copy_from_card = arcrimi_copy_from_card;
+
+        /*
+         * re-reserve the memory region - arcrimi_probe() alloced this reqion
+         * but didn't know the real size.  Free that region and then re-get
+         * with the correct size.  There is a VERY slim chance this could
+         * fail.
+         */
+        release_mem_region(shmem, BUFFER_SIZE);
+        if (!request_mem_region(dev->mem_start,
+                                dev->mem_end - dev->mem_start + 1,
+                                "arcnet (90xx)")) {
+                BUGMSG(D_NORMAL, "Card memory already allocated\n");
+                goto err_free_irq;
+        }
+
+        lp->mem_start = ioremap(dev->mem_start, dev->mem_end - dev->mem_start + 1);
+        if (!lp->mem_start) {
+                BUGMSG(D_NORMAL, "Can't remap device memory!\n");
+                goto err_release_mem;
+        }
+
+        /* get and check the station ID from offset 1 in shmem */
+        dev->dev_addr[0] = readb(lp->mem_start + 1);
+
+        BUGMSG(D_NORMAL, "ARCnet RIM I: station %02Xh found at IRQ %d, "
+               "ShMem %lXh (%ld*%d bytes).\n",
+               dev->dev_addr[0],
+               dev->irq, dev->mem_start,
+         (dev->mem_end - dev->mem_start + 1) / mirror_size, mirror_size);
+
+        err = register_netdev(dev);
+        if (err)
+                goto err_unmap;
+
+        return 0;
+
+err_unmap:
+        iounmap(lp->mem_start);
+err_release_mem:
+        release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
+err_free_irq:
+        free_irq(dev->irq, dev);
+        return -EIO;
+}
+
+
+/*
+ * Do a hardware reset on the card, and set up necessary registers.
+ *
+ * This should be called as little as possible, because it disrupts the
+ * token on the network (causes a RECON) and requires a significant delay.
+ *
+ * However, it does make sure the card is in a defined state.
+ */
+static int arcrimi_reset(struct net_device *dev, int really_reset)
+{
+        struct arcnet_local *lp = dev->priv;
+        void __iomem *ioaddr = lp->mem_start + 0x800;
+
+        BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", dev->name, ASTATUS());
+
+        if (really_reset) {
+                writeb(TESTvalue, ioaddr - 0x800);      /* fake reset */
+                return 0;
+        }
+        ACOMMAND(CFLAGScmd | RESETclear);       /* clear flags & end reset */
+        ACOMMAND(CFLAGScmd | CONFIGclear);
+
+        /* enable extended (512-byte) packets */
+        ACOMMAND(CONFIGcmd | EXTconf);
+
+        /* done!  return success. */
+        return 0;
+}
+
+static void arcrimi_setmask(struct net_device *dev, int mask)
+{
+        struct arcnet_local *lp = dev->priv;
+        void __iomem *ioaddr = lp->mem_start + 0x800;
+
+        AINTMASK(mask);
+}
+
+static int arcrimi_status(struct net_device *dev)
+{
+        struct arcnet_local *lp = dev->priv;
+        void __iomem *ioaddr = lp->mem_start + 0x800;
+
+        return ASTATUS();
+}
+
+static void arcrimi_command(struct net_device *dev, int cmd)
+{
+        struct arcnet_local *lp = dev->priv;
+        void __iomem *ioaddr = lp->mem_start + 0x800;
+
+        ACOMMAND(cmd);
+}
+
+static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
+                                 void *buf, int count)
+{
+        struct arcnet_local *lp = dev->priv;
+        void __iomem *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset;
+        TIME("memcpy_toio", count, memcpy_toio(memaddr, buf, count));
+}
+
+
+static void arcrimi_copy_from_card(struct net_device *dev, int bufnum, int offset,
+                                   void *buf, int count)
+{
+        struct arcnet_local *lp = dev->priv;
+        void __iomem *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset;
+        TIME("memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
+}
+
+static int node;
+static int io;                  /* use the insmod io= irq= node= options */
+static int irq;
+static char device[9];          /* use eg. device=arc1 to change name */
+
+module_param(node, int, 0);
+module_param(io, int, 0);
+module_param(irq, int, 0);
+module_param_string(device, device, sizeof(device), 0);
+MODULE_LICENSE("GPL");
+
+static struct net_device *my_dev;
+
+static int __init arc_rimi_init(void)
+{
+        struct net_device *dev;
+
+        dev = alloc_arcdev(device);
+        if (!dev)
+                return -ENOMEM;
+
+        if (node && node != 0xff)
+                dev->dev_addr[0] = node;
+
+        dev->mem_start = io;
+        dev->irq = irq;
+        if (dev->irq == 2)
+                dev->irq = 9;
+
+        if (arcrimi_probe(dev)) {
+                free_netdev(dev);
+                return -EIO;
+        }
+
+        my_dev = dev;
+        return 0;
+}
+
+static void __exit arc_rimi_exit(void)
+{
+        struct net_device *dev = my_dev;
+        struct arcnet_local *lp = dev->priv;
+
+        unregister_netdev(dev);
+        iounmap(lp->mem_start);
+        release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
+        free_irq(dev->irq, dev);
+        free_netdev(dev);
+}
+
+#ifndef MODULE
+static int __init arcrimi_setup(char *s)
+{
+        int ints[8];
+        s = get_options(s, 8, ints);
+        if (!ints[0])
+                return 1;
+        switch (ints[0]) {
+        default:                /* ERROR */
+                printk("arcrimi: Too many arguments.\n");
+        case 3:         /* Node ID */
+                node = ints[3];
+        case 2:         /* IRQ */
+                irq = ints[2];
+        case 1:         /* IO address */
+                io = ints[1];
+        }
+        if (*s)
+                snprintf(device, sizeof(device), "%s", s);
+        return 1;
+}
+__setup("arcrimi=", arcrimi_setup);
+#endif                          /* MODULE */
+
+module_init(arc_rimi_init)
+module_exit(arc_rimi_exit)