Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1202 insertions, 0 deletions

diff --git a/drivers/net/sb1000.c b/drivers/net/sb1000.c
new file mode 100644
index 000000000000..e15369c8d165
--- /dev/null
+++ b/drivers/net/sb1000.c
@@ -0,0 +1,1202 @@
+/* sb1000.c: A General Instruments SB1000 driver for linux. */
+/*
+        Written 1998 by Franco Venturi.
+
+        Copyright 1998 by Franco Venturi.
+        Copyright 1994,1995 by Donald Becker.
+        Copyright 1993 United States Government as represented by the
+        Director, National Security Agency.
+
+        This driver is for the General Instruments SB1000 (internal SURFboard)
+
+        The author may be reached as fventuri@mediaone.net
+
+        This program is free software; you can redistribute it
+        and/or  modify it under  the terms of  the GNU General
+        Public  License as  published  by  the  Free  Software
+        Foundation;  either  version 2 of the License, or  (at
+        your option) any later version.
+
+        Changes:
+
+        981115 Steven Hirsch <shirsch@adelphia.net>
+
+        Linus changed the timer interface.  Should work on all recent
+        development kernels.
+
+        980608 Steven Hirsch <shirsch@adelphia.net>
+
+        Small changes to make it work with 2.1.x kernels. Hopefully,
+        nothing major will change before official release of Linux 2.2.
+        
+        Merged with 2.2 - Alan Cox
+*/
+
+static char version[] = "sb1000.c:v1.1.2 6/01/98 (fventuri@mediaone.net)\n";
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+#include <linux/if_cablemodem.h> /* for SIOGCM/SIOSCM stuff */
+#include <linux/in.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/skbuff.h>
+#include <linux/delay.h>        /* for udelay() */
+#include <linux/etherdevice.h>
+#include <linux/pnp.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+
+#ifdef SB1000_DEBUG
+static int sb1000_debug = SB1000_DEBUG;
+#else
+static int sb1000_debug = 1;
+#endif
+
+static const int SB1000_IO_EXTENT = 8;
+/* SB1000 Maximum Receive Unit */
+static const int SB1000_MRU = 1500; /* octects */
+
+#define NPIDS 4
+struct sb1000_private {
+        struct sk_buff *rx_skb[NPIDS];
+        short rx_dlen[NPIDS];
+        unsigned int rx_frames;
+        short rx_error_count;
+        short rx_error_dpc_count;
+        unsigned char rx_session_id[NPIDS];
+        unsigned char rx_frame_id[NPIDS];
+        unsigned char rx_pkt_type[NPIDS];
+        struct net_device_stats stats;
+};
+
+/* prototypes for Linux interface */
+extern int sb1000_probe(struct net_device *dev);
+static int sb1000_open(struct net_device *dev);
+static int sb1000_dev_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
+static int sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static irqreturn_t sb1000_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static struct net_device_stats *sb1000_stats(struct net_device *dev);
+static int sb1000_close(struct net_device *dev);
+
+
+/* SB1000 hardware routines to be used during open/configuration phases */
+static inline void nicedelay(unsigned long usecs);
+static inline int card_wait_for_busy_clear(const int ioaddr[],
+        const char* name);
+static inline int card_wait_for_ready(const int ioaddr[], const char* name,
+        unsigned char in[]);
+static inline int card_send_command(const int ioaddr[], const char* name,
+        const unsigned char out[], unsigned char in[]);
+
+/* SB1000 hardware routines to be used during frame rx interrupt */
+static inline int sb1000_wait_for_ready(const int ioaddr[], const char* name);
+static inline int sb1000_wait_for_ready_clear(const int ioaddr[],
+        const char* name);
+static inline void sb1000_send_command(const int ioaddr[], const char* name,
+        const unsigned char out[]);
+static inline void sb1000_read_status(const int ioaddr[], unsigned char in[]);
+static inline void sb1000_issue_read_command(const int ioaddr[],
+        const char* name);
+
+/* SB1000 commands for open/configuration */
+static inline int sb1000_reset(const int ioaddr[], const char* name);
+static inline int sb1000_check_CRC(const int ioaddr[], const char* name);
+static inline int sb1000_start_get_set_command(const int ioaddr[],
+        const char* name);
+static inline int sb1000_end_get_set_command(const int ioaddr[],
+        const char* name);
+static inline int sb1000_activate(const int ioaddr[], const char* name);
+static int sb1000_get_firmware_version(const int ioaddr[],
+        const char* name, unsigned char version[], int do_end);
+static int sb1000_get_frequency(const int ioaddr[], const char* name,
+        int* frequency);
+static int sb1000_set_frequency(const int ioaddr[], const char* name,
+        int frequency);
+static int sb1000_get_PIDs(const int ioaddr[], const char* name,
+        short PID[]);
+static int sb1000_set_PIDs(const int ioaddr[], const char* name,
+        const short PID[]);
+
+/* SB1000 commands for frame rx interrupt */
+static inline int sb1000_rx(struct net_device *dev);
+static inline void sb1000_error_dpc(struct net_device *dev);
+
+static const struct pnp_device_id sb1000_pnp_ids[] = {
+        { "GIC1000", 0 },
+        { "", 0 }
+};
+MODULE_DEVICE_TABLE(pnp, sb1000_pnp_ids);
+
+static int
+sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id)
+{
+        struct net_device *dev;
+        unsigned short ioaddr[2], irq;
+        unsigned int serial_number;
+        int error = -ENODEV;
+        
+        if (pnp_device_attach(pdev) < 0)
+                return -ENODEV;
+        if (pnp_activate_dev(pdev) < 0)
+                goto out_detach;
+
+        if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1))
+                goto out_disable;
+        if (!pnp_irq_valid(pdev, 0))
+                goto out_disable;
+                
+        serial_number = pdev->card->serial;
+                
+        ioaddr[0] = pnp_port_start(pdev, 0);
+        ioaddr[1] = pnp_port_start(pdev, 0);
+                
+        irq = pnp_irq(pdev, 0);
+
+        if (!request_region(ioaddr[0], 16, "sb1000"))
+                goto out_disable;
+        if (!request_region(ioaddr[1], 16, "sb1000"))
+                goto out_release_region0;
+
+        dev = alloc_etherdev(sizeof(struct sb1000_private));
+        if (!dev) {
+                error = -ENOMEM;
+                goto out_release_regions;
+        }
+
+                 
+        dev->base_addr = ioaddr[0];
+        /* mem_start holds the second I/O address */
+        dev->mem_start = ioaddr[1];
+        dev->irq = irq;
+
+        if (sb1000_debug > 0)
+                printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), "
+                        "S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr,
+                        dev->mem_start, serial_number, dev->irq);
+
+        /*
+         * The SB1000 is an rx-only cable modem device.  The uplink is a modem
+         * and we do not want to arp on it.
+         */
+        dev->flags = IFF_POINTOPOINT|IFF_NOARP;
+
+        SET_MODULE_OWNER(dev);
+        SET_NETDEV_DEV(dev, &pdev->dev);
+
+        if (sb1000_debug > 0)
+                printk(KERN_NOTICE "%s", version);
+
+        /* The SB1000-specific entries in the device structure. */
+        dev->open               = sb1000_open;
+        dev->do_ioctl           = sb1000_dev_ioctl;
+        dev->hard_start_xmit    = sb1000_start_xmit;
+        dev->stop               = sb1000_close;
+        dev->get_stats          = sb1000_stats;
+
+        /* hardware address is 0:0:serial_number */
+        dev->dev_addr[2]        = serial_number >> 24 & 0xff;
+        dev->dev_addr[3]        = serial_number >> 16 & 0xff;
+        dev->dev_addr[4]        = serial_number >>  8 & 0xff;
+        dev->dev_addr[5]        = serial_number >>  0 & 0xff;
+
+        pnp_set_drvdata(pdev, dev);
+
+        error = register_netdev(dev);
+        if (error)
+                goto out_free_netdev;
+        return 0;
+
+ out_free_netdev:
+        free_netdev(dev);
+ out_release_regions:
+        release_region(ioaddr[1], 16);
+ out_release_region0:
+        release_region(ioaddr[0], 16);
+ out_disable:
+        pnp_disable_dev(pdev);
+ out_detach:
+        pnp_device_detach(pdev);
+        return error;
+}
+
+static void
+sb1000_remove_one(struct pnp_dev *pdev)
+{
+        struct net_device *dev = pnp_get_drvdata(pdev);
+
+        unregister_netdev(dev);
+        release_region(dev->base_addr, 16);
+        release_region(dev->mem_start, 16);
+        free_netdev(dev);
+}
+
+static struct pnp_driver sb1000_driver = {
+        .name           = "sb1000",
+        .id_table       = sb1000_pnp_ids,
+        .probe          = sb1000_probe_one,
+        .remove         = sb1000_remove_one,
+};
+
+
+/*
+ * SB1000 hardware routines to be used during open/configuration phases
+ */
+
+static const int TimeOutJiffies = (875 * HZ) / 100;
+
+static inline void nicedelay(unsigned long usecs)
+{
+        current->state = TASK_INTERRUPTIBLE;
+        schedule_timeout(HZ);
+        return;
+}
+
+/* Card Wait For Busy Clear (cannot be used during an interrupt) */
+static inline int
+card_wait_for_busy_clear(const int ioaddr[], const char* name)
+{
+        unsigned char a;
+        unsigned long timeout;
+
+        a = inb(ioaddr[0] + 7);
+        timeout = jiffies + TimeOutJiffies;
+        while (a & 0x80 || a & 0x40) {
+                /* a little sleep */
+                yield();
+
+                a = inb(ioaddr[0] + 7);
+                if (time_after_eq(jiffies, timeout)) {
+                        printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n",
+                                name);
+                        return -ETIME;
+                }
+        }
+
+        return 0;
+}
+
+/* Card Wait For Ready (cannot be used during an interrupt) */
+static inline int
+card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[])
+{
+        unsigned char a;
+        unsigned long timeout;
+
+        a = inb(ioaddr[1] + 6);
+        timeout = jiffies + TimeOutJiffies;
+        while (a & 0x80 || !(a & 0x40)) {
+                /* a little sleep */
+                yield();
+
+                a = inb(ioaddr[1] + 6);
+                if (time_after_eq(jiffies, timeout)) {
+                        printk(KERN_WARNING "%s: card_wait_for_ready timeout\n",
+                                name);
+                        return -ETIME;
+                }
+        }
+
+        in[1] = inb(ioaddr[0] + 1);
+        in[2] = inb(ioaddr[0] + 2);
+        in[3] = inb(ioaddr[0] + 3);
+        in[4] = inb(ioaddr[0] + 4);
+        in[0] = inb(ioaddr[0] + 5);
+        in[6] = inb(ioaddr[0] + 6);
+        in[5] = inb(ioaddr[1] + 6);
+        return 0;
+}
+
+/* Card Send Command (cannot be used during an interrupt) */
+static inline int
+card_send_command(const int ioaddr[], const char* name,
+        const unsigned char out[], unsigned char in[])
+{
+        int status, x;
+
+        if ((status = card_wait_for_busy_clear(ioaddr, name)))
+                return status;
+        outb(0xa0, ioaddr[0] + 6);
+        outb(out[2], ioaddr[0] + 1);
+        outb(out[3], ioaddr[0] + 2);
+        outb(out[4], ioaddr[0] + 3);
+        outb(out[5], ioaddr[0] + 4);
+        outb(out[1], ioaddr[0] + 5);
+        outb(0xa0, ioaddr[0] + 6);
+        outb(out[0], ioaddr[0] + 7);
+        if (out[0] != 0x20 && out[0] != 0x30) {
+                if ((status = card_wait_for_ready(ioaddr, name, in)))
+                        return status;
+                inb(ioaddr[0] + 7);
+                if (sb1000_debug > 3)
+                        printk(KERN_DEBUG "%s: card_send_command "
+                                "out: %02x%02x%02x%02x%02x%02x  "
+                                "in: %02x%02x%02x%02x%02x%02x%02x\n", name,
+                                out[0], out[1], out[2], out[3], out[4], out[5],
+                                in[0], in[1], in[2], in[3], in[4], in[5], in[6]);
+        } else {
+                if (sb1000_debug > 3)
+                        printk(KERN_DEBUG "%s: card_send_command "
+                                "out: %02x%02x%02x%02x%02x%02x\n", name,
+                                out[0], out[1], out[2], out[3], out[4], out[5]);
+        }
+
+        if (out[1] == 0x1b) {
+                x = (out[2] == 0x02);
+        } else {
+                if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
+                        return -EIO;
+        }
+        return 0;
+}
+
+
+/*
+ * SB1000 hardware routines to be used during frame rx interrupt
+ */
+static const int Sb1000TimeOutJiffies = 7 * HZ;
+
+/* Card Wait For Ready (to be used during frame rx) */
+static inline int
+sb1000_wait_for_ready(const int ioaddr[], const char* name)
+{
+        unsigned long timeout;
+
+        timeout = jiffies + Sb1000TimeOutJiffies;
+        while (inb(ioaddr[1] + 6) & 0x80) {
+                if (time_after_eq(jiffies, timeout)) {
+                        printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
+                                name);
+                        return -ETIME;
+                }
+        }
+        timeout = jiffies + Sb1000TimeOutJiffies;
+        while (!(inb(ioaddr[1] + 6) & 0x40)) {
+                if (time_after_eq(jiffies, timeout)) {
+                        printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
+                                name);
+                        return -ETIME;
+                }
+        }
+        inb(ioaddr[0] + 7);
+        return 0;
+}
+
+/* Card Wait For Ready Clear (to be used during frame rx) */
+static inline int
+sb1000_wait_for_ready_clear(const int ioaddr[], const char* name)
+{
+        unsigned long timeout;
+
+        timeout = jiffies + Sb1000TimeOutJiffies;
+        while (inb(ioaddr[1] + 6) & 0x80) {
+                if (time_after_eq(jiffies, timeout)) {
+                        printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
+                                name);
+                        return -ETIME;
+                }
+        }
+        timeout = jiffies + Sb1000TimeOutJiffies;
+        while (inb(ioaddr[1] + 6) & 0x40) {
+                if (time_after_eq(jiffies, timeout)) {
+                        printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
+                                name);
+                        return -ETIME;
+                }
+        }
+        return 0;
+}
+
+/* Card Send Command (to be used during frame rx) */
+static inline void
+sb1000_send_command(const int ioaddr[], const char* name,
+        const unsigned char out[])
+{
+        outb(out[2], ioaddr[0] + 1);
+        outb(out[3], ioaddr[0] + 2);
+        outb(out[4], ioaddr[0] + 3);
+        outb(out[5], ioaddr[0] + 4);
+        outb(out[1], ioaddr[0] + 5);
+        outb(out[0], ioaddr[0] + 7);
+        if (sb1000_debug > 3)
+                printk(KERN_DEBUG "%s: sb1000_send_command out: %02x%02x%02x%02x"
+                        "%02x%02x\n", name, out[0], out[1], out[2], out[3], out[4], out[5]);
+        return;
+}
+
+/* Card Read Status (to be used during frame rx) */
+static inline void
+sb1000_read_status(const int ioaddr[], unsigned char in[])
+{
+        in[1] = inb(ioaddr[0] + 1);
+        in[2] = inb(ioaddr[0] + 2);
+        in[3] = inb(ioaddr[0] + 3);
+        in[4] = inb(ioaddr[0] + 4);
+        in[0] = inb(ioaddr[0] + 5);
+        return;
+}
+
+/* Issue Read Command (to be used during frame rx) */
+static inline void
+sb1000_issue_read_command(const int ioaddr[], const char* name)
+{
+        const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00};
+
+        sb1000_wait_for_ready_clear(ioaddr, name);
+        outb(0xa0, ioaddr[0] + 6);
+        sb1000_send_command(ioaddr, name, Command0);
+        return;
+}
+
+
+/*
+ * SB1000 commands for open/configuration
+ */
+/* reset SB1000 card */
+static inline int
+sb1000_reset(const int ioaddr[], const char* name)
+{
+        unsigned char st[7];
+        int port, status;
+        const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
+
+        port = ioaddr[1] + 6;
+        outb(0x4, port);
+        inb(port);
+        udelay(1000);
+        outb(0x0, port);
+        inb(port);
+        nicedelay(60000);
+        outb(0x4, port);
+        inb(port);
+        udelay(1000);
+        outb(0x0, port);
+        inb(port);
+        udelay(0);
+
+        if ((status = card_send_command(ioaddr, name, Command0, st)))
+                return status;
+        if (st[3] != 0xf0)
+                return -EIO;
+        return 0;
+}
+
+/* check SB1000 firmware CRC */
+static inline int
+sb1000_check_CRC(const int ioaddr[], const char* name)
+{
+        unsigned char st[7];
+        int crc, status;
+        const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
+
+        /* check CRC */
+        if ((status = card_send_command(ioaddr, name, Command0, st)))
+                return status;
+        if (st[1] != st[3] || st[2] != st[4])
+                return -EIO;
+        crc = st[1] << 8 | st[2];
+        return 0;
+}
+
+static inline int
+sb1000_start_get_set_command(const int ioaddr[], const char* name)
+{
+        unsigned char st[7];
+        const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00};
+
+        return card_send_command(ioaddr, name, Command0, st);
+}
+
+static inline int
+sb1000_end_get_set_command(const int ioaddr[], const char* name)
+{
+        unsigned char st[7];
+        int status;
+        const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00};
+        const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+        if ((status = card_send_command(ioaddr, name, Command0, st)))
+                return status;
+        return card_send_command(ioaddr, name, Command1, st);
+}
+
+static inline int
+sb1000_activate(const int ioaddr[], const char* name)
+{
+        unsigned char st[7];
+        int status;
+        const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00};
+        const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
+
+        nicedelay(50000);
+        if ((status = card_send_command(ioaddr, name, Command0, st)))
+                return status;
+        if ((status = card_send_command(ioaddr, name, Command1, st)))
+                return status;
+        if (st[3] != 0xf1) {
+        if ((status = sb1000_start_get_set_command(ioaddr, name)))
+                        return status;
+                return -EIO;
+        }
+        udelay(1000);
+    return sb1000_start_get_set_command(ioaddr, name);
+}
+
+/* get SB1000 firmware version */
+static int
+sb1000_get_firmware_version(const int ioaddr[], const char* name,
+        unsigned char version[], int do_end)
+{
+        unsigned char st[7];
+        int status;
+        const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00};
+
+        if ((status = sb1000_start_get_set_command(ioaddr, name)))
+                return status;
+        if ((status = card_send_command(ioaddr, name, Command0, st)))
+                return status;
+        if (st[0] != 0xa3)
+                return -EIO;
+        version[0] = st[1];
+        version[1] = st[2];
+        if (do_end)
+                return sb1000_end_get_set_command(ioaddr, name);
+        else
+                return 0;
+}
+
+/* get SB1000 frequency */
+static int
+sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency)
+{
+        unsigned char st[7];
+        int status;
+        const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00};
+
+        udelay(1000);
+        if ((status = sb1000_start_get_set_command(ioaddr, name)))
+                return status;
+        if ((status = card_send_command(ioaddr, name, Command0, st)))
+                return status;
+        *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4];
+        return sb1000_end_get_set_command(ioaddr, name);
+}
+
+/* set SB1000 frequency */
+static int
+sb1000_set_frequency(const int ioaddr[], const char* name, int frequency)
+{
+        unsigned char st[7];
+        int status;
+        unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00};
+
+        const int FrequencyLowerLimit = 57000;
+        const int FrequencyUpperLimit = 804000;
+
+        if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) {
+                printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range "
+                        "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit,
+                        FrequencyUpperLimit);
+                return -EINVAL;
+        }
+        udelay(1000);
+        if ((status = sb1000_start_get_set_command(ioaddr, name)))
+                return status;
+        Command0[5] = frequency & 0xff;
+        frequency >>= 8;
+        Command0[4] = frequency & 0xff;
+        frequency >>= 8;
+        Command0[3] = frequency & 0xff;
+        frequency >>= 8;
+        Command0[2] = frequency & 0xff;
+        return card_send_command(ioaddr, name, Command0, st);
+}
+
+/* get SB1000 PIDs */
+static int
+sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[])
+{
+        unsigned char st[7];
+        int status;
+        const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00};
+        const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00};
+        const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00};
+        const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00};
+
+        udelay(1000);
+        if ((status = sb1000_start_get_set_command(ioaddr, name)))
+                return status;
+
+        if ((status = card_send_command(ioaddr, name, Command0, st)))
+                return status;
+        PID[0] = st[1] << 8 | st[2];
+
+        if ((status = card_send_command(ioaddr, name, Command1, st)))
+                return status;
+        PID[1] = st[1] << 8 | st[2];
+
+        if ((status = card_send_command(ioaddr, name, Command2, st)))
+                return status;
+        PID[2] = st[1] << 8 | st[2];
+
+        if ((status = card_send_command(ioaddr, name, Command3, st)))
+                return status;
+        PID[3] = st[1] << 8 | st[2];
+
+        return sb1000_end_get_set_command(ioaddr, name);
+}
+
+/* set SB1000 PIDs */
+static int
+sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[])
+{
+        unsigned char st[7];
+        short p;
+        int status;
+        unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00};
+        unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00};
+        unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00};
+        unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00};
+        const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
+
+        udelay(1000);
+        if ((status = sb1000_start_get_set_command(ioaddr, name)))
+                return status;
+
+        p = PID[0];
+        Command0[3] = p & 0xff;
+        p >>= 8;
+        Command0[2] = p & 0xff;
+        if ((status = card_send_command(ioaddr, name, Command0, st)))
+                return status;
+
+        p = PID[1];
+        Command1[3] = p & 0xff;
+        p >>= 8;
+        Command1[2] = p & 0xff;
+        if ((status = card_send_command(ioaddr, name, Command1, st)))
+                return status;
+
+        p = PID[2];
+        Command2[3] = p & 0xff;
+        p >>= 8;
+        Command2[2] = p & 0xff;
+        if ((status = card_send_command(ioaddr, name, Command2, st)))
+                return status;
+
+        p = PID[3];
+        Command3[3] = p & 0xff;
+        p >>= 8;
+        Command3[2] = p & 0xff;
+        if ((status = card_send_command(ioaddr, name, Command3, st)))
+                return status;
+
+        if ((status = card_send_command(ioaddr, name, Command4, st)))
+                return status;
+        return sb1000_end_get_set_command(ioaddr, name);
+}
+
+
+static inline void
+sb1000_print_status_buffer(const char* name, unsigned char st[],
+        unsigned char buffer[], int size)
+{
+        int i, j, k;
+
+        printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]);
+        if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) {
+                printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d "
+                        "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29],
+                        buffer[35], buffer[38], buffer[39], buffer[40], buffer[41],
+            buffer[46] << 8 | buffer[47],
+                        buffer[42], buffer[43], buffer[44], buffer[45],
+            buffer[48] << 8 | buffer[49]);
+        } else {
+                for (i = 0, k = 0; i < (size + 7) / 8; i++) {
+                        printk(KERN_DEBUG "%s: %s", name, i ? "       " : "buffer:");
+                        for (j = 0; j < 8 && k < size; j++, k++)
+                                printk(" %02x", buffer[k]);
+                        printk("\n");
+                }
+        }
+        return;
+}
+
+/*
+ * SB1000 commands for frame rx interrupt
+ */
+/* receive a single frame and assemble datagram
+ * (this is the heart of the interrupt routine)
+ */
+static inline int
+sb1000_rx(struct net_device *dev)
+{
+
+#define FRAMESIZE 184
+        unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id;
+        short dlen;
+        int ioaddr, ns;
+        unsigned int skbsize;
+        struct sk_buff *skb;
+        struct sb1000_private *lp = netdev_priv(dev);
+        struct net_device_stats *stats = &lp->stats;
+
+        /* SB1000 frame constants */
+        const int FrameSize = FRAMESIZE;
+        const int NewDatagramHeaderSkip = 8;
+        const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18;
+        const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize;
+        const int ContDatagramHeaderSkip = 7;
+        const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1;
+        const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize;
+        const int TrailerSize = 4;
+
+        ioaddr = dev->base_addr;
+
+        insw(ioaddr, (unsigned short*) st, 1);
+#ifdef XXXDEBUG
+printk("cm0: received: %02x %02x\n", st[0], st[1]);
+#endif /* XXXDEBUG */
+        lp->rx_frames++;
+
+        /* decide if it is a good or bad frame */
+        for (ns = 0; ns < NPIDS; ns++) {
+                session_id = lp->rx_session_id[ns];
+                frame_id = lp->rx_frame_id[ns];
+                if (st[0] == session_id) {
+                        if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) {
+                                goto good_frame;
+                        } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) {
+                                goto skipped_frame;
+                        } else {
+                                goto bad_frame;
+                        }
+                } else if (st[0] == (session_id | 0x40)) {
+                        if ((st[1] & 0xf0) == 0x30) {
+                                goto skipped_frame;
+                        } else {
+                                goto bad_frame;
+                        }
+                }
+        }
+        goto bad_frame;
+
+skipped_frame:
+        stats->rx_frame_errors++;
+        skb = lp->rx_skb[ns];
+        if (sb1000_debug > 1)
+                printk(KERN_WARNING "%s: missing frame(s): got %02x %02x "
+                        "expecting %02x %02x\n", dev->name, st[0], st[1],
+                        skb ? session_id : session_id | 0x40, frame_id);
+        if (skb) {
+                dev_kfree_skb(skb);
+                skb = NULL;
+        }
+
+good_frame:
+        lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f);
+        /* new datagram */
+        if (st[0] & 0x40) {
+                /* get data length */
+                insw(ioaddr, buffer, NewDatagramHeaderSize / 2);
+#ifdef XXXDEBUG
+printk("cm0: IP identification: %02x%02x  fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]);
+#endif /* XXXDEBUG */
+                if (buffer[0] != NewDatagramHeaderSkip) {
+                        if (sb1000_debug > 1)
+                                printk(KERN_WARNING "%s: new datagram header skip error: "
+                                        "got %02x expecting %02x\n", dev->name, buffer[0],
+                                        NewDatagramHeaderSkip);
+                        stats->rx_length_errors++;
+                        insw(ioaddr, buffer, NewDatagramDataSize / 2);
+                        goto bad_frame_next;
+                }
+                dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 |
+                        buffer[NewDatagramHeaderSkip + 4]) - 17;
+                if (dlen > SB1000_MRU) {
+                        if (sb1000_debug > 1)
+                                printk(KERN_WARNING "%s: datagram length (%d) greater "
+                                        "than MRU (%d)\n", dev->name, dlen, SB1000_MRU);
+                        stats->rx_length_errors++;
+                        insw(ioaddr, buffer, NewDatagramDataSize / 2);
+                        goto bad_frame_next;
+                }
+                lp->rx_dlen[ns] = dlen;
+                /* compute size to allocate for datagram */
+                skbsize = dlen + FrameSize;
+                if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) {
+                        if (sb1000_debug > 1)
+                                printk(KERN_WARNING "%s: can't allocate %d bytes long "
+                                        "skbuff\n", dev->name, skbsize);
+                        stats->rx_dropped++;
+                        insw(ioaddr, buffer, NewDatagramDataSize / 2);
+                        goto dropped_frame;
+                }
+                skb->dev = dev;
+                skb->mac.raw = skb->data;
+                skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16];
+                insw(ioaddr, skb_put(skb, NewDatagramDataSize),
+                        NewDatagramDataSize / 2);
+                lp->rx_skb[ns] = skb;
+        } else {
+                /* continuation of previous datagram */
+                insw(ioaddr, buffer, ContDatagramHeaderSize / 2);
+                if (buffer[0] != ContDatagramHeaderSkip) {
+                        if (sb1000_debug > 1)
+                                printk(KERN_WARNING "%s: cont datagram header skip error: "
+                                        "got %02x expecting %02x\n", dev->name, buffer[0],
+                                        ContDatagramHeaderSkip);
+                        stats->rx_length_errors++;
+                        insw(ioaddr, buffer, ContDatagramDataSize / 2);
+                        goto bad_frame_next;
+                }
+                skb = lp->rx_skb[ns];
+                insw(ioaddr, skb_put(skb, ContDatagramDataSize),
+                        ContDatagramDataSize / 2);
+                dlen = lp->rx_dlen[ns];
+        }
+        if (skb->len < dlen + TrailerSize) {
+                lp->rx_session_id[ns] &= ~0x40;
+                return 0;
+        }
+
+        /* datagram completed: send to upper level */
+        skb_trim(skb, dlen);
+        netif_rx(skb);
+        dev->last_rx = jiffies;
+        stats->rx_bytes+=dlen;
+        stats->rx_packets++;
+        lp->rx_skb[ns] = NULL;
+        lp->rx_session_id[ns] |= 0x40;
+        return 0;
+
+bad_frame:
+        insw(ioaddr, buffer, FrameSize / 2);
+        if (sb1000_debug > 1)
+                printk(KERN_WARNING "%s: frame error: got %02x %02x\n",
+                        dev->name, st[0], st[1]);
+        stats->rx_frame_errors++;
+bad_frame_next:
+        if (sb1000_debug > 2)
+                sb1000_print_status_buffer(dev->name, st, buffer, FrameSize);
+dropped_frame:
+        stats->rx_errors++;
+        if (ns < NPIDS) {
+                if ((skb = lp->rx_skb[ns])) {
+                        dev_kfree_skb(skb);
+                        lp->rx_skb[ns] = NULL;
+                }
+                lp->rx_session_id[ns] |= 0x40;
+        }
+        return -1;
+}
+
+static inline void
+sb1000_error_dpc(struct net_device *dev)
+{
+        char *name;
+        unsigned char st[5];
+        int ioaddr[2];
+        struct sb1000_private *lp = netdev_priv(dev);
+        const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00};
+        const int ErrorDpcCounterInitialize = 200;
+
+        ioaddr[0] = dev->base_addr;
+        /* mem_start holds the second I/O address */
+        ioaddr[1] = dev->mem_start;
+        name = dev->name;
+
+        sb1000_wait_for_ready_clear(ioaddr, name);
+        sb1000_send_command(ioaddr, name, Command0);
+        sb1000_wait_for_ready(ioaddr, name);
+        sb1000_read_status(ioaddr, st);
+        if (st[1] & 0x10)
+                lp->rx_error_dpc_count = ErrorDpcCounterInitialize;
+        return;
+}
+
+
+/*
+ * Linux interface functions
+ */
+static int
+sb1000_open(struct net_device *dev)
+{
+        char *name;
+        int ioaddr[2], status;
+        struct sb1000_private *lp = netdev_priv(dev);
+        const unsigned short FirmwareVersion[] = {0x01, 0x01};
+
+        ioaddr[0] = dev->base_addr;
+        /* mem_start holds the second I/O address */
+        ioaddr[1] = dev->mem_start;
+        name = dev->name;
+
+        /* initialize sb1000 */
+        if ((status = sb1000_reset(ioaddr, name)))
+                return status;
+        nicedelay(200000);
+        if ((status = sb1000_check_CRC(ioaddr, name)))
+                return status;
+
+        /* initialize private data before board can catch interrupts */
+        lp->rx_skb[0] = NULL;
+        lp->rx_skb[1] = NULL;
+        lp->rx_skb[2] = NULL;
+        lp->rx_skb[3] = NULL;
+        lp->rx_dlen[0] = 0;
+        lp->rx_dlen[1] = 0;
+        lp->rx_dlen[2] = 0;
+        lp->rx_dlen[3] = 0;
+        lp->rx_frames = 0;
+        lp->rx_error_count = 0;
+        lp->rx_error_dpc_count = 0;
+        lp->rx_session_id[0] = 0x50;
+        lp->rx_session_id[0] = 0x48;
+        lp->rx_session_id[0] = 0x44;
+        lp->rx_session_id[0] = 0x42;
+        lp->rx_frame_id[0] = 0;
+        lp->rx_frame_id[1] = 0;
+        lp->rx_frame_id[2] = 0;
+        lp->rx_frame_id[3] = 0;
+        if (request_irq(dev->irq, &sb1000_interrupt, 0, "sb1000", dev)) {
+                return -EAGAIN;
+        }
+
+        if (sb1000_debug > 2)
+                printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq);
+
+        /* Activate board and check firmware version */
+        udelay(1000);
+        if ((status = sb1000_activate(ioaddr, name)))
+                return status;
+        udelay(0);
+        if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0)))
+                return status;
+        if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1])
+                printk(KERN_WARNING "%s: found firmware version %x.%02x "
+                        "(should be %x.%02x)\n", name, version[0], version[1],
+                        FirmwareVersion[0], FirmwareVersion[1]);
+
+
+        netif_start_queue(dev);
+        return 0;                                       /* Always succeed */
+}
+
+static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+        char* name;
+        unsigned char version[2];
+        short PID[4];
+        int ioaddr[2], status, frequency;
+        unsigned int stats[5];
+        struct sb1000_private *lp = netdev_priv(dev);
+
+        if (!(dev && dev->flags & IFF_UP))
+                return -ENODEV;
+
+        ioaddr[0] = dev->base_addr;
+        /* mem_start holds the second I/O address */
+        ioaddr[1] = dev->mem_start;
+        name = dev->name;
+
+        switch (cmd) {
+        case SIOCGCMSTATS:              /* get statistics */
+                stats[0] = lp->stats.rx_bytes;
+                stats[1] = lp->rx_frames;
+                stats[2] = lp->stats.rx_packets;
+                stats[3] = lp->stats.rx_errors;
+                stats[4] = lp->stats.rx_dropped;
+                if(copy_to_user(ifr->ifr_data, stats, sizeof(stats)))
+                        return -EFAULT;
+                status = 0;
+                break;
+
+        case SIOCGCMFIRMWARE:           /* get firmware version */
+                if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1)))
+                        return status;
+                if(copy_to_user(ifr->ifr_data, version, sizeof(version)))
+                        return -EFAULT;
+                break;
+
+        case SIOCGCMFREQUENCY:          /* get frequency */
+                if ((status = sb1000_get_frequency(ioaddr, name, &frequency)))
+                        return status;
+                if(put_user(frequency, (int __user *) ifr->ifr_data))
+                        return -EFAULT;
+                break;
+
+        case SIOCSCMFREQUENCY:          /* set frequency */
+                if (!capable(CAP_NET_ADMIN))
+                        return -EPERM;
+                if(get_user(frequency, (int __user *) ifr->ifr_data))
+                        return -EFAULT;
+                if ((status = sb1000_set_frequency(ioaddr, name, frequency)))
+                        return status;
+                break;
+
+        case SIOCGCMPIDS:                       /* get PIDs */
+                if ((status = sb1000_get_PIDs(ioaddr, name, PID)))
+                        return status;
+                if(copy_to_user(ifr->ifr_data, PID, sizeof(PID)))
+                        return -EFAULT;
+                break;
+
+        case SIOCSCMPIDS:                       /* set PIDs */
+                if (!capable(CAP_NET_ADMIN))
+                        return -EPERM;
+                if(copy_from_user(PID, ifr->ifr_data, sizeof(PID)))
+                        return -EFAULT;
+                if ((status = sb1000_set_PIDs(ioaddr, name, PID)))
+                        return status;
+                /* set session_id, frame_id and pkt_type too */
+                lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f);
+                lp->rx_session_id[1] = 0x48;
+                lp->rx_session_id[2] = 0x44;
+                lp->rx_session_id[3] = 0x42;
+                lp->rx_frame_id[0] = 0;
+                lp->rx_frame_id[1] = 0;
+                lp->rx_frame_id[2] = 0;
+                lp->rx_frame_id[3] = 0;
+                break;
+
+        default:
+                status = -EINVAL;
+                break;
+        }
+        return status;
+}
+
+/* transmit function: do nothing since SB1000 can't send anything out */
+static int
+sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+        printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name);
+        /* sb1000 can't xmit datagrams */
+        dev_kfree_skb(skb);
+        return 0;
+}
+
+/* SB1000 interrupt handler. */
+static irqreturn_t sb1000_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+        char *name;
+        unsigned char st;
+        int ioaddr[2];
+        struct net_device *dev = (struct net_device *) dev_id;
+        struct sb1000_private *lp = netdev_priv(dev);
+
+        const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00};
+        const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
+        const int MaxRxErrorCount = 6;
+
+        if (dev == NULL) {
+                printk(KERN_ERR "sb1000_interrupt(): irq %d for unknown device.\n",
+                        irq);
+                return IRQ_NONE;
+        }
+
+        ioaddr[0] = dev->base_addr;
+        /* mem_start holds the second I/O address */
+        ioaddr[1] = dev->mem_start;
+        name = dev->name;
+
+        /* is it a good interrupt? */
+        st = inb(ioaddr[1] + 6);
+        if (!(st & 0x08 && st & 0x20)) {
+                return IRQ_NONE;
+        }
+
+        if (sb1000_debug > 3)
+                printk(KERN_DEBUG "%s: entering interrupt\n", dev->name);
+
+        st = inb(ioaddr[0] + 7);
+        if (sb1000_rx(dev))
+                lp->rx_error_count++;
+#ifdef SB1000_DELAY
+        udelay(SB1000_DELAY);
+#endif /* SB1000_DELAY */
+        sb1000_issue_read_command(ioaddr, name);
+        if (st & 0x01) {
+                sb1000_error_dpc(dev);
+                sb1000_issue_read_command(ioaddr, name);
+        }
+        if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) {
+                sb1000_wait_for_ready_clear(ioaddr, name);
+                sb1000_send_command(ioaddr, name, Command0);
+                sb1000_wait_for_ready(ioaddr, name);
+                sb1000_issue_read_command(ioaddr, name);
+        }
+        if (lp->rx_error_count >= MaxRxErrorCount) {
+                sb1000_wait_for_ready_clear(ioaddr, name);
+                sb1000_send_command(ioaddr, name, Command1);
+                sb1000_wait_for_ready(ioaddr, name);
+                sb1000_issue_read_command(ioaddr, name);
+                lp->rx_error_count = 0;
+        }
+
+        return IRQ_HANDLED;
+}
+
+static struct net_device_stats *sb1000_stats(struct net_device *dev)
+{
+        struct sb1000_private *lp = netdev_priv(dev);
+        return &lp->stats;
+}
+
+static int sb1000_close(struct net_device *dev)
+{
+        int i;
+        int ioaddr[2];
+        struct sb1000_private *lp = netdev_priv(dev);
+
+        if (sb1000_debug > 2)
+                printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name);
+
+        netif_stop_queue(dev);
+        
+        ioaddr[0] = dev->base_addr;
+        /* mem_start holds the second I/O address */
+        ioaddr[1] = dev->mem_start;
+
+        free_irq(dev->irq, dev);
+        /* If we don't do this, we can't re-insmod it later. */
+        release_region(ioaddr[1], SB1000_IO_EXTENT);
+        release_region(ioaddr[0], SB1000_IO_EXTENT);
+
+        /* free rx_skb's if needed */
+        for (i=0; i<4; i++) {
+                if (lp->rx_skb[i]) {
+                        dev_kfree_skb(lp->rx_skb[i]);
+                }
+        }
+        return 0;
+}
+
+MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>");
+MODULE_DESCRIPTION("General Instruments SB1000 driver");
+MODULE_LICENSE("GPL");
+
+static int __init
+sb1000_init(void)
+{
+        return pnp_register_driver(&sb1000_driver);
+}
+
+static void __exit
+sb1000_exit(void)
+{
+        pnp_unregister_driver(&sb1000_driver);
+}
+
+module_init(sb1000_init);
+module_exit(sb1000_exit);