--- /dev/null
+/* 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/sched.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/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 <linux/gfp.h>
+
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+
+#ifdef SB1000_DEBUG
+static int sb1000_debug = SB1000_DEBUG;
+#else
+static const 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];
+};
+
+/* 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 netdev_tx_t sb1000_start_xmit(struct sk_buff *skb,
+ struct net_device *dev);
+static irqreturn_t sb1000_interrupt(int irq, void *dev_id);
+static int sb1000_close(struct net_device *dev);
+
+
+/* SB1000 hardware routines to be used during open/configuration phases */
+static int card_wait_for_busy_clear(const int ioaddr[],
+ const char* name);
+static int card_wait_for_ready(const int ioaddr[], const char* name,
+ unsigned char in[]);
+static 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 int sb1000_wait_for_ready(const int ioaddr[], const char* name);
+static int sb1000_wait_for_ready_clear(const int ioaddr[],
+ const char* name);
+static void sb1000_send_command(const int ioaddr[], const char* name,
+ const unsigned char out[]);
+static void sb1000_read_status(const int ioaddr[], unsigned char in[]);
+static void sb1000_issue_read_command(const int ioaddr[],
+ const char* name);
+
+/* SB1000 commands for open/configuration */
+static int sb1000_reset(const int ioaddr[], const char* name);
+static 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 int sb1000_end_get_set_command(const int ioaddr[],
+ const char* name);
+static 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 int sb1000_rx(struct net_device *dev);
+static 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 const struct net_device_ops sb1000_netdev_ops = {
+ .ndo_open = sb1000_open,
+ .ndo_start_xmit = sb1000_start_xmit,
+ .ndo_do_ioctl = sb1000_dev_ioctl,
+ .ndo_stop = sb1000_close,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+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_NETDEV_DEV(dev, &pdev->dev);
+
+ if (sb1000_debug > 0)
+ printk(KERN_NOTICE "%s", version);
+
+ dev->netdev_ops = &sb1000_netdev_ops;
+
+ /* 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;
+
+/* Card Wait For Busy Clear (cannot be used during an interrupt) */
+static 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 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 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 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 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 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]);
+}
+
+/* Card Read Status (to be used during frame rx) */
+static 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);
+}
+
+/* Issue Read Command (to be used during frame rx) */
+static void
+sb1000_issue_read_command(const int ioaddr[], const char* name)
+{
+ static 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);
+}
+
+
+/*
+ * SB1000 commands for open/configuration
+ */
+/* reset SB1000 card */
+static int
+sb1000_reset(const int ioaddr[], const char* name)
+{
+ static const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
+
+ unsigned char st[7];
+ int port, status;
+
+ port = ioaddr[1] + 6;
+ outb(0x4, port);
+ inb(port);
+ udelay(1000);
+ outb(0x0, port);
+ inb(port);
+ ssleep(1);
+ 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 int
+sb1000_check_CRC(const int ioaddr[], const char* name)
+{
+ static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
+
+ unsigned char st[7];
+ int crc, status;
+
+ /* 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)
+{
+ static const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00};
+
+ unsigned char st[7];
+
+ return card_send_command(ioaddr, name, Command0, st);
+}
+
+static int
+sb1000_end_get_set_command(const int ioaddr[], const char* name)
+{
+ static const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00};
+ static const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+ unsigned char st[7];
+ int status;
+
+ if ((status = card_send_command(ioaddr, name, Command0, st)))
+ return status;
+ return card_send_command(ioaddr, name, Command1, st);
+}
+
+static int
+sb1000_activate(const int ioaddr[], const char* name)
+{
+ static const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00};
+ static const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
+
+ unsigned char st[7];
+ int status;
+
+ ssleep(1);
+ 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)
+{
+ static const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00};
+
+ unsigned char st[7];
+ int status;
+
+ 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)
+{
+ static const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00};
+
+ unsigned char st[7];
+ int status;
+
+ 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[])
+{
+ static const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00};
+ static const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00};
+ static const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00};
+ static const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00};
+
+ unsigned char st[7];
+ int status;
+
+ 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[])
+{
+ static const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
+
+ 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};
+
+ 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 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");
+ }
+ }
+}
+
+/*
+ * SB1000 commands for frame rx interrupt
+ */
+/* receive a single frame and assemble datagram
+ * (this is the heart of the interrupt routine)
+ */
+static 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 = &dev->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_reset_mac_header(skb);
+ 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);
+ 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 void
+sb1000_error_dpc(struct net_device *dev)
+{
+ static const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00};
+
+ char *name;
+ unsigned char st[5];
+ int ioaddr[2];
+ struct sb1000_private *lp = netdev_priv(dev);
+ 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;
+}
+
+
+/*
+ * 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;
+ ssleep(1);
+ 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[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;
+ 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] = dev->stats.rx_bytes;
+ stats[1] = lp->rx_frames;
+ stats[2] = dev->stats.rx_packets;
+ stats[3] = dev->stats.rx_errors;
+ stats[4] = dev->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 netdev_tx_t
+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 NETDEV_TX_OK;
+}
+
+/* SB1000 interrupt handler. */
+static irqreturn_t sb1000_interrupt(int irq, void *dev_id)
+{
+ static const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00};
+ static const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
+
+ char *name;
+ unsigned char st;
+ int ioaddr[2];
+ struct net_device *dev = dev_id;
+ struct sb1000_private *lp = netdev_priv(dev);
+
+ const int MaxRxErrorCount = 6;
+
+ 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 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");
+
+module_pnp_driver(sb1000_driver);
Code Review / kvmfornfv.git / blobdiff