1195 lines
32 KiB
C
1195 lines
32 KiB
C
/* sb1000.c: A General Instruments SB1000 driver for linux. */
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/*
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Written 1998 by Franco Venturi.
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Copyright 1998 by Franco Venturi.
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Copyright 1994,1995 by Donald Becker.
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Copyright 1993 United States Government as represented by the
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Director, National Security Agency.
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This driver is for the General Instruments SB1000 (internal SURFboard)
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The author may be reached as fventuri@mediaone.net
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This program is free software; you can redistribute it
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and/or modify it under the terms of the GNU General
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Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at
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your option) any later version.
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Changes:
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981115 Steven Hirsch <shirsch@adelphia.net>
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Linus changed the timer interface. Should work on all recent
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development kernels.
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980608 Steven Hirsch <shirsch@adelphia.net>
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Small changes to make it work with 2.1.x kernels. Hopefully,
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nothing major will change before official release of Linux 2.2.
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Merged with 2.2 - Alan Cox
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*/
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static char version[] = "sb1000.c:v1.1.2 6/01/98 (fventuri@mediaone.net)\n";
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/interrupt.h>
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#include <linux/errno.h>
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#include <linux/if_cablemodem.h> /* for SIOGCM/SIOSCM stuff */
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#include <linux/in.h>
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#include <linux/slab.h>
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#include <linux/ioport.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/skbuff.h>
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#include <linux/delay.h> /* for udelay() */
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#include <linux/etherdevice.h>
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#include <linux/pnp.h>
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#include <linux/init.h>
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#include <linux/bitops.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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#include <asm/uaccess.h>
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#ifdef SB1000_DEBUG
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static int sb1000_debug = SB1000_DEBUG;
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#else
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static int sb1000_debug = 1;
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#endif
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static const int SB1000_IO_EXTENT = 8;
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/* SB1000 Maximum Receive Unit */
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static const int SB1000_MRU = 1500; /* octects */
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#define NPIDS 4
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struct sb1000_private {
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struct sk_buff *rx_skb[NPIDS];
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short rx_dlen[NPIDS];
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unsigned int rx_frames;
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short rx_error_count;
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short rx_error_dpc_count;
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unsigned char rx_session_id[NPIDS];
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unsigned char rx_frame_id[NPIDS];
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unsigned char rx_pkt_type[NPIDS];
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struct net_device_stats stats;
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};
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/* prototypes for Linux interface */
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extern int sb1000_probe(struct net_device *dev);
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static int sb1000_open(struct net_device *dev);
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static int sb1000_dev_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
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static int sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev);
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static irqreturn_t sb1000_interrupt(int irq, void *dev_id, struct pt_regs *regs);
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static struct net_device_stats *sb1000_stats(struct net_device *dev);
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static int sb1000_close(struct net_device *dev);
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/* SB1000 hardware routines to be used during open/configuration phases */
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static inline int card_wait_for_busy_clear(const int ioaddr[],
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const char* name);
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static inline int card_wait_for_ready(const int ioaddr[], const char* name,
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unsigned char in[]);
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static inline int card_send_command(const int ioaddr[], const char* name,
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const unsigned char out[], unsigned char in[]);
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/* SB1000 hardware routines to be used during frame rx interrupt */
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static inline int sb1000_wait_for_ready(const int ioaddr[], const char* name);
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static inline int sb1000_wait_for_ready_clear(const int ioaddr[],
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const char* name);
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static inline void sb1000_send_command(const int ioaddr[], const char* name,
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const unsigned char out[]);
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static inline void sb1000_read_status(const int ioaddr[], unsigned char in[]);
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static inline void sb1000_issue_read_command(const int ioaddr[],
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const char* name);
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/* SB1000 commands for open/configuration */
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static inline int sb1000_reset(const int ioaddr[], const char* name);
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static inline int sb1000_check_CRC(const int ioaddr[], const char* name);
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static inline int sb1000_start_get_set_command(const int ioaddr[],
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const char* name);
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static inline int sb1000_end_get_set_command(const int ioaddr[],
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const char* name);
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static inline int sb1000_activate(const int ioaddr[], const char* name);
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static int sb1000_get_firmware_version(const int ioaddr[],
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const char* name, unsigned char version[], int do_end);
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static int sb1000_get_frequency(const int ioaddr[], const char* name,
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int* frequency);
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static int sb1000_set_frequency(const int ioaddr[], const char* name,
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int frequency);
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static int sb1000_get_PIDs(const int ioaddr[], const char* name,
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short PID[]);
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static int sb1000_set_PIDs(const int ioaddr[], const char* name,
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const short PID[]);
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/* SB1000 commands for frame rx interrupt */
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static inline int sb1000_rx(struct net_device *dev);
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static inline void sb1000_error_dpc(struct net_device *dev);
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static const struct pnp_device_id sb1000_pnp_ids[] = {
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{ "GIC1000", 0 },
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{ "", 0 }
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};
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MODULE_DEVICE_TABLE(pnp, sb1000_pnp_ids);
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static int
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sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id)
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{
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struct net_device *dev;
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unsigned short ioaddr[2], irq;
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unsigned int serial_number;
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int error = -ENODEV;
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if (pnp_device_attach(pdev) < 0)
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return -ENODEV;
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if (pnp_activate_dev(pdev) < 0)
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goto out_detach;
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if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1))
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goto out_disable;
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if (!pnp_irq_valid(pdev, 0))
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goto out_disable;
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serial_number = pdev->card->serial;
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ioaddr[0] = pnp_port_start(pdev, 0);
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ioaddr[1] = pnp_port_start(pdev, 0);
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irq = pnp_irq(pdev, 0);
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if (!request_region(ioaddr[0], 16, "sb1000"))
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goto out_disable;
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if (!request_region(ioaddr[1], 16, "sb1000"))
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goto out_release_region0;
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dev = alloc_etherdev(sizeof(struct sb1000_private));
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if (!dev) {
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error = -ENOMEM;
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goto out_release_regions;
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}
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dev->base_addr = ioaddr[0];
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/* mem_start holds the second I/O address */
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dev->mem_start = ioaddr[1];
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dev->irq = irq;
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if (sb1000_debug > 0)
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printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), "
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"S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr,
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dev->mem_start, serial_number, dev->irq);
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/*
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* The SB1000 is an rx-only cable modem device. The uplink is a modem
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* and we do not want to arp on it.
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*/
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dev->flags = IFF_POINTOPOINT|IFF_NOARP;
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SET_MODULE_OWNER(dev);
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SET_NETDEV_DEV(dev, &pdev->dev);
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if (sb1000_debug > 0)
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printk(KERN_NOTICE "%s", version);
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/* The SB1000-specific entries in the device structure. */
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dev->open = sb1000_open;
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dev->do_ioctl = sb1000_dev_ioctl;
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dev->hard_start_xmit = sb1000_start_xmit;
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dev->stop = sb1000_close;
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dev->get_stats = sb1000_stats;
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/* hardware address is 0:0:serial_number */
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dev->dev_addr[2] = serial_number >> 24 & 0xff;
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dev->dev_addr[3] = serial_number >> 16 & 0xff;
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dev->dev_addr[4] = serial_number >> 8 & 0xff;
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dev->dev_addr[5] = serial_number >> 0 & 0xff;
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pnp_set_drvdata(pdev, dev);
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error = register_netdev(dev);
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if (error)
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goto out_free_netdev;
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return 0;
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out_free_netdev:
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free_netdev(dev);
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out_release_regions:
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release_region(ioaddr[1], 16);
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out_release_region0:
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release_region(ioaddr[0], 16);
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out_disable:
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pnp_disable_dev(pdev);
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out_detach:
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pnp_device_detach(pdev);
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return error;
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}
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static void
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sb1000_remove_one(struct pnp_dev *pdev)
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{
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struct net_device *dev = pnp_get_drvdata(pdev);
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unregister_netdev(dev);
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release_region(dev->base_addr, 16);
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release_region(dev->mem_start, 16);
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free_netdev(dev);
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}
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static struct pnp_driver sb1000_driver = {
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.name = "sb1000",
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.id_table = sb1000_pnp_ids,
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.probe = sb1000_probe_one,
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.remove = sb1000_remove_one,
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};
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/*
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* SB1000 hardware routines to be used during open/configuration phases
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*/
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static const int TimeOutJiffies = (875 * HZ) / 100;
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/* Card Wait For Busy Clear (cannot be used during an interrupt) */
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static inline int
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card_wait_for_busy_clear(const int ioaddr[], const char* name)
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{
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unsigned char a;
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unsigned long timeout;
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a = inb(ioaddr[0] + 7);
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timeout = jiffies + TimeOutJiffies;
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while (a & 0x80 || a & 0x40) {
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/* a little sleep */
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yield();
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a = inb(ioaddr[0] + 7);
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if (time_after_eq(jiffies, timeout)) {
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printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n",
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name);
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return -ETIME;
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}
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}
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return 0;
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}
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/* Card Wait For Ready (cannot be used during an interrupt) */
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static inline int
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card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[])
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{
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unsigned char a;
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unsigned long timeout;
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a = inb(ioaddr[1] + 6);
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timeout = jiffies + TimeOutJiffies;
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while (a & 0x80 || !(a & 0x40)) {
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/* a little sleep */
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yield();
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a = inb(ioaddr[1] + 6);
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if (time_after_eq(jiffies, timeout)) {
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printk(KERN_WARNING "%s: card_wait_for_ready timeout\n",
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name);
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return -ETIME;
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}
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}
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in[1] = inb(ioaddr[0] + 1);
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in[2] = inb(ioaddr[0] + 2);
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in[3] = inb(ioaddr[0] + 3);
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in[4] = inb(ioaddr[0] + 4);
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in[0] = inb(ioaddr[0] + 5);
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in[6] = inb(ioaddr[0] + 6);
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in[5] = inb(ioaddr[1] + 6);
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return 0;
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}
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/* Card Send Command (cannot be used during an interrupt) */
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static inline int
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card_send_command(const int ioaddr[], const char* name,
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const unsigned char out[], unsigned char in[])
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{
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int status, x;
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if ((status = card_wait_for_busy_clear(ioaddr, name)))
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return status;
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outb(0xa0, ioaddr[0] + 6);
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outb(out[2], ioaddr[0] + 1);
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outb(out[3], ioaddr[0] + 2);
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outb(out[4], ioaddr[0] + 3);
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outb(out[5], ioaddr[0] + 4);
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outb(out[1], ioaddr[0] + 5);
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outb(0xa0, ioaddr[0] + 6);
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outb(out[0], ioaddr[0] + 7);
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if (out[0] != 0x20 && out[0] != 0x30) {
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if ((status = card_wait_for_ready(ioaddr, name, in)))
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return status;
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inb(ioaddr[0] + 7);
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if (sb1000_debug > 3)
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printk(KERN_DEBUG "%s: card_send_command "
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"out: %02x%02x%02x%02x%02x%02x "
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"in: %02x%02x%02x%02x%02x%02x%02x\n", name,
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out[0], out[1], out[2], out[3], out[4], out[5],
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in[0], in[1], in[2], in[3], in[4], in[5], in[6]);
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} else {
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if (sb1000_debug > 3)
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printk(KERN_DEBUG "%s: card_send_command "
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"out: %02x%02x%02x%02x%02x%02x\n", name,
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out[0], out[1], out[2], out[3], out[4], out[5]);
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}
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if (out[1] == 0x1b) {
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x = (out[2] == 0x02);
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} else {
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if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
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return -EIO;
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}
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return 0;
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}
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|
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/*
|
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* SB1000 hardware routines to be used during frame rx interrupt
|
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*/
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static const int Sb1000TimeOutJiffies = 7 * HZ;
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/* Card Wait For Ready (to be used during frame rx) */
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static inline int
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sb1000_wait_for_ready(const int ioaddr[], const char* name)
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{
|
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unsigned long timeout;
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timeout = jiffies + Sb1000TimeOutJiffies;
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while (inb(ioaddr[1] + 6) & 0x80) {
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if (time_after_eq(jiffies, timeout)) {
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printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
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name);
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return -ETIME;
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}
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}
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timeout = jiffies + Sb1000TimeOutJiffies;
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while (!(inb(ioaddr[1] + 6) & 0x40)) {
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if (time_after_eq(jiffies, timeout)) {
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printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
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name);
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return -ETIME;
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}
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}
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inb(ioaddr[0] + 7);
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return 0;
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}
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/* Card Wait For Ready Clear (to be used during frame rx) */
|
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static inline int
|
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sb1000_wait_for_ready_clear(const int ioaddr[], const char* name)
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{
|
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unsigned long timeout;
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timeout = jiffies + Sb1000TimeOutJiffies;
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while (inb(ioaddr[1] + 6) & 0x80) {
|
||
if (time_after_eq(jiffies, timeout)) {
|
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printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
|
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name);
|
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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,
|
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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);
|
||
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 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};
|
||
|
||
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)
|
||
{
|
||
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;
|
||
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[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);
|