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@@ -1,1216 +0,0 @@
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-/*
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-net-3-driver for the SKNET MCA-based cards
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-
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-This is an extension to the Linux operating system, and is covered by the
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-same GNU General Public License that covers that work.
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-
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-Copyright 1999 by Alfred Arnold (alfred@ccac.rwth-aachen.de,
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- alfred.arnold@lancom.de)
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-
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-This driver is based both on the 3C523 driver and the SK_G16 driver.
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-
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-paper sources:
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- 'PC Hardware: Aufbau, Funktionsweise, Programmierung' by
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- Hans-Peter Messmer for the basic Microchannel stuff
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-
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- 'Linux Geraetetreiber' by Allesandro Rubini, Kalle Dalheimer
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- for help on Ethernet driver programming
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-
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- 'Ethernet/IEEE 802.3 Family 1992 World Network Data Book/Handbook' by AMD
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- for documentation on the AM7990 LANCE
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-
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- 'SKNET Personal Technisches Manual', Version 1.2 by Schneider&Koch
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- for documentation on the Junior board
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-
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- 'SK-NET MC2+ Technical Manual", Version 1.1 by Schneider&Koch for
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- documentation on the MC2 bord
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-
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- A big thank you to the S&K support for providing me so quickly with
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- documentation!
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-
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- Also see http://www.syskonnect.com/
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-
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- Missing things:
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-
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- -> set debug level via ioctl instead of compile-time switches
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- -> I didn't follow the development of the 2.1.x kernels, so my
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- assumptions about which things changed with which kernel version
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- are probably nonsense
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-
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-History:
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- May 16th, 1999
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- startup
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- May 22st, 1999
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- added private structure, methods
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- begun building data structures in RAM
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- May 23nd, 1999
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- can receive frames, send frames
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- May 24th, 1999
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- modularized initialization of LANCE
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- loadable as module
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- still Tx problem :-(
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- May 26th, 1999
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- MC2 works
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- support for multiple devices
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- display media type for MC2+
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- May 28th, 1999
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- fixed problem in GetLANCE leaving interrupts turned off
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- increase TX queue to 4 packets to improve send performance
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- May 29th, 1999
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- a few corrections in statistics, caught rcvr overruns
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- reinitialization of LANCE/board in critical situations
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- MCA info implemented
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- implemented LANCE multicast filter
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- Jun 6th, 1999
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- additions for Linux 2.2
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- Dec 25th, 1999
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- unfortunately there seem to be newer MC2+ boards that react
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- on IRQ 3/5/9/10 instead of 3/5/10/11, so we have to autoprobe
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- in questionable cases...
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- Dec 28th, 1999
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- integrated patches from David Weinehall & Bill Wendling for 2.3
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- kernels (isa_...functions). Things are defined in a way that
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- it still works with 2.0.x 8-)
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- Dec 30th, 1999
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- added handling of the remaining interrupt conditions. That
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- should cure the spurious hangs.
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- Jan 30th, 2000
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- newer kernels automatically probe more than one board, so the
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- 'startslot' as a variable is also needed here
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- June 1st, 2000
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- added changes for recent 2.3 kernels
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-
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- *************************************************************************/
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-
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-#include <linux/kernel.h>
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-#include <linux/string.h>
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-#include <linux/errno.h>
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-#include <linux/ioport.h>
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-#include <linux/slab.h>
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-#include <linux/interrupt.h>
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-#include <linux/delay.h>
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-#include <linux/time.h>
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-#include <linux/mca-legacy.h>
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-#include <linux/init.h>
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-#include <linux/module.h>
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-#include <linux/netdevice.h>
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-#include <linux/etherdevice.h>
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-#include <linux/skbuff.h>
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-#include <linux/bitops.h>
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-
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-#include <asm/processor.h>
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-#include <asm/io.h>
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-
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-#define _SK_MCA_DRIVER_
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-#include "sk_mca.h"
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-
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-/* ------------------------------------------------------------------------
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- * global static data - not more since we can handle multiple boards and
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- * have to pack all state info into the device struct!
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- * ------------------------------------------------------------------------ */
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-
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-static char *MediaNames[Media_Count] =
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- { "10Base2", "10BaseT", "10Base5", "Unknown" };
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-
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-static unsigned char poly[] =
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- { 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0,
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- 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0
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-};
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-
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-/* ------------------------------------------------------------------------
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- * private subfunctions
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- * ------------------------------------------------------------------------ */
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-
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-/* dump parts of shared memory - only needed during debugging */
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-
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-#ifdef DEBUG
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-static void dumpmem(struct net_device *dev, u32 start, u32 len)
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-{
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- skmca_priv *priv = netdev_priv(dev);
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- int z;
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-
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- for (z = 0; z < len; z++) {
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- if ((z & 15) == 0)
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- printk("%04x:", z);
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- printk(" %02x", readb(priv->base + start + z));
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- if ((z & 15) == 15)
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- printk("\n");
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- }
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-}
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-
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-/* print exact time - ditto */
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-
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-static void PrTime(void)
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-{
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- struct timeval tv;
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-
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- do_gettimeofday(&tv);
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- printk("%9d:%06d: ", tv.tv_sec, tv.tv_usec);
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-}
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-#endif
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-
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-/* deduce resources out of POS registers */
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-
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-static void __init getaddrs(int slot, int junior, int *base, int *irq,
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- skmca_medium * medium)
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-{
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- u_char pos0, pos1, pos2;
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-
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- if (junior) {
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- pos0 = mca_read_stored_pos(slot, 2);
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- *base = ((pos0 & 0x0e) << 13) + 0xc0000;
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- *irq = ((pos0 & 0x10) >> 4) + 10;
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- *medium = Media_Unknown;
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- } else {
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- /* reset POS 104 Bits 0+1 so the shared memory region goes to the
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- configured area between 640K and 1M. Afterwards, enable the MC2.
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- I really don't know what rode SK to do this... */
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-
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- mca_write_pos(slot, 4,
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- mca_read_stored_pos(slot, 4) & 0xfc);
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- mca_write_pos(slot, 2,
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- mca_read_stored_pos(slot, 2) | 0x01);
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-
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- pos1 = mca_read_stored_pos(slot, 3);
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- pos2 = mca_read_stored_pos(slot, 4);
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- *base = ((pos1 & 0x07) << 14) + 0xc0000;
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- switch (pos2 & 0x0c) {
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- case 0:
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- *irq = 3;
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- break;
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- case 4:
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- *irq = 5;
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- break;
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- case 8:
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- *irq = -10;
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- break;
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- case 12:
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- *irq = -11;
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- break;
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- }
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- *medium = (pos2 >> 6) & 3;
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- }
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-}
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-
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-/* check for both cards:
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- When the MC2 is turned off, it was configured for more than 15MB RAM,
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- is disabled and won't get detected using the standard probe. We
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- therefore have to scan the slots manually :-( */
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-
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-static int __init dofind(int *junior, int firstslot)
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-{
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- int slot;
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- unsigned int id;
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-
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- for (slot = firstslot; slot < MCA_MAX_SLOT_NR; slot++) {
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- id = mca_read_stored_pos(slot, 0)
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- + (((unsigned int) mca_read_stored_pos(slot, 1)) << 8);
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-
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- *junior = 0;
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- if (id == SKNET_MCA_ID)
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- return slot;
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- *junior = 1;
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- if (id == SKNET_JUNIOR_MCA_ID)
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- return slot;
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- }
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- return MCA_NOTFOUND;
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-}
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-
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-/* reset the whole board */
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-
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-static void ResetBoard(struct net_device *dev)
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-{
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- skmca_priv *priv = netdev_priv(dev);
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-
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- writeb(CTRL_RESET_ON, priv->ctrladdr);
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- udelay(10);
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- writeb(CTRL_RESET_OFF, priv->ctrladdr);
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-}
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-
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-/* wait for LANCE interface to become not busy */
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-
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-static int WaitLANCE(struct net_device *dev)
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-{
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- skmca_priv *priv = netdev_priv(dev);
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- int t = 0;
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-
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- while ((readb(priv->ctrladdr) & STAT_IO_BUSY) ==
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- STAT_IO_BUSY) {
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- udelay(1);
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- if (++t > 1000) {
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- printk("%s: LANCE access timeout", dev->name);
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- return 0;
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- }
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- }
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-
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- return 1;
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-}
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-
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-/* set LANCE register - must be atomic */
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-
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-static void SetLANCE(struct net_device *dev, u16 addr, u16 value)
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-{
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- skmca_priv *priv = netdev_priv(dev);
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- unsigned long flags;
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-
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- /* disable interrupts */
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-
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- spin_lock_irqsave(&priv->lock, flags);
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-
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- /* wait until no transfer is pending */
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-
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- WaitLANCE(dev);
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-
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- /* transfer register address to RAP */
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-
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- writeb(CTRL_RESET_OFF | CTRL_RW_WRITE | CTRL_ADR_RAP, priv->ctrladdr);
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- writew(addr, priv->ioregaddr);
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- writeb(IOCMD_GO, priv->cmdaddr);
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- udelay(1);
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- WaitLANCE(dev);
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-
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- /* transfer data to register */
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-
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- writeb(CTRL_RESET_OFF | CTRL_RW_WRITE | CTRL_ADR_DATA, priv->ctrladdr);
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- writew(value, priv->ioregaddr);
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- writeb(IOCMD_GO, priv->cmdaddr);
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- udelay(1);
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- WaitLANCE(dev);
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-
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- /* reenable interrupts */
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-
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- spin_unlock_irqrestore(&priv->lock, flags);
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-}
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-
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-/* get LANCE register */
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-
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-static u16 GetLANCE(struct net_device *dev, u16 addr)
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-{
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- skmca_priv *priv = netdev_priv(dev);
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- unsigned long flags;
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- unsigned int res;
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-
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- /* disable interrupts */
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-
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- spin_lock_irqsave(&priv->lock, flags);
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-
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- /* wait until no transfer is pending */
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-
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- WaitLANCE(dev);
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-
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- /* transfer register address to RAP */
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-
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- writeb(CTRL_RESET_OFF | CTRL_RW_WRITE | CTRL_ADR_RAP, priv->ctrladdr);
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- writew(addr, priv->ioregaddr);
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- writeb(IOCMD_GO, priv->cmdaddr);
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- udelay(1);
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- WaitLANCE(dev);
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-
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- /* transfer data from register */
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-
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- writeb(CTRL_RESET_OFF | CTRL_RW_READ | CTRL_ADR_DATA, priv->ctrladdr);
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- writeb(IOCMD_GO, priv->cmdaddr);
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- udelay(1);
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- WaitLANCE(dev);
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- res = readw(priv->ioregaddr);
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-
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- /* reenable interrupts */
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-
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- spin_unlock_irqrestore(&priv->lock, flags);
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-
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- return res;
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-}
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-
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-/* build up descriptors in shared RAM */
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-
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-static void InitDscrs(struct net_device *dev)
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-{
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- skmca_priv *priv = netdev_priv(dev);
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- u32 bufaddr;
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-
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- /* Set up Tx descriptors. The board has only 16K RAM so bits 16..23
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- are always 0. */
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-
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- bufaddr = RAM_DATABASE;
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- {
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- LANCE_TxDescr descr;
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- int z;
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-
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- for (z = 0; z < TXCOUNT; z++) {
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- descr.LowAddr = bufaddr;
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- descr.Flags = 0;
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- descr.Len = 0xf000;
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- descr.Status = 0;
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- memcpy_toio(priv->base + RAM_TXBASE +
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- (z * sizeof(LANCE_TxDescr)), &descr,
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- sizeof(LANCE_TxDescr));
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- memset_io(priv->base + bufaddr, 0, RAM_BUFSIZE);
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- bufaddr += RAM_BUFSIZE;
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- }
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- }
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-
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- /* do the same for the Rx descriptors */
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-
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- {
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- LANCE_RxDescr descr;
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- int z;
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-
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- for (z = 0; z < RXCOUNT; z++) {
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- descr.LowAddr = bufaddr;
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- descr.Flags = RXDSCR_FLAGS_OWN;
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- descr.MaxLen = -RAM_BUFSIZE;
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- descr.Len = 0;
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- memcpy_toio(priv->base + RAM_RXBASE +
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- (z * sizeof(LANCE_RxDescr)), &descr,
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- sizeof(LANCE_RxDescr));
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- memset_io(priv->base + bufaddr, 0, RAM_BUFSIZE);
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- bufaddr += RAM_BUFSIZE;
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- }
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- }
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-}
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-
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-/* calculate the hash bit position for a given multicast address
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- taken more or less directly from the AMD datasheet... */
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-
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-static void UpdateCRC(unsigned char *CRC, int bit)
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-{
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- int j;
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-
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- /* shift CRC one bit */
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-
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- memmove(CRC + 1, CRC, 32 * sizeof(unsigned char));
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- CRC[0] = 0;
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-
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- /* if bit XOR controlbit = 1, set CRC = CRC XOR polynomial */
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-
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- if (bit ^ CRC[32])
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- for (j = 0; j < 32; j++)
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- CRC[j] ^= poly[j];
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-}
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-
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-static unsigned int GetHash(char *address)
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-{
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- unsigned char CRC[33];
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- int i, byte, hashcode;
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-
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- /* a multicast address has bit 0 in the first byte set */
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-
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- if ((address[0] & 1) == 0)
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- return -1;
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-
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- /* initialize CRC */
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-
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- memset(CRC, 1, sizeof(CRC));
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-
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- /* loop through address bits */
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-
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- for (byte = 0; byte < 6; byte++)
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- for (i = 0; i < 8; i++)
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- UpdateCRC(CRC, (address[byte] >> i) & 1);
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-
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- /* hashcode is the 6 least significant bits of the CRC */
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-
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- hashcode = 0;
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- for (i = 0; i < 6; i++)
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- hashcode = (hashcode << 1) + CRC[i];
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- return hashcode;
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-}
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-
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-/* feed ready-built initialization block into LANCE */
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-
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-static void InitLANCE(struct net_device *dev)
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-{
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- skmca_priv *priv = netdev_priv(dev);
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-
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- /* build up descriptors. */
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-
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- InitDscrs(dev);
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-
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|
|
- /* next RX descriptor to be read is the first one. Since the LANCE
|
|
|
- will start from the beginning after initialization, we have to
|
|
|
- reset out pointers too. */
|
|
|
-
|
|
|
- priv->nextrx = 0;
|
|
|
-
|
|
|
- /* no TX descriptors active */
|
|
|
-
|
|
|
- priv->nexttxput = priv->nexttxdone = priv->txbusy = 0;
|
|
|
-
|
|
|
- /* set up the LANCE bus control register - constant for SKnet boards */
|
|
|
-
|
|
|
- SetLANCE(dev, LANCE_CSR3,
|
|
|
- CSR3_BSWAP_OFF | CSR3_ALE_LOW | CSR3_BCON_HOLD);
|
|
|
-
|
|
|
- /* write address of initialization block into LANCE */
|
|
|
-
|
|
|
- SetLANCE(dev, LANCE_CSR1, RAM_INITBASE & 0xffff);
|
|
|
- SetLANCE(dev, LANCE_CSR2, (RAM_INITBASE >> 16) & 0xff);
|
|
|
-
|
|
|
- /* we don't get ready until the LANCE has read the init block */
|
|
|
-
|
|
|
- netif_stop_queue(dev);
|
|
|
-
|
|
|
- /* let LANCE read the initialization block. LANCE is ready
|
|
|
- when we receive the corresponding interrupt. */
|
|
|
-
|
|
|
- SetLANCE(dev, LANCE_CSR0, CSR0_INEA | CSR0_INIT);
|
|
|
-}
|
|
|
-
|
|
|
-/* stop the LANCE so we can reinitialize it */
|
|
|
-
|
|
|
-static void StopLANCE(struct net_device *dev)
|
|
|
-{
|
|
|
- /* can't take frames any more */
|
|
|
-
|
|
|
- netif_stop_queue(dev);
|
|
|
-
|
|
|
- /* disable interrupts, stop it */
|
|
|
-
|
|
|
- SetLANCE(dev, LANCE_CSR0, CSR0_STOP);
|
|
|
-}
|
|
|
-
|
|
|
-/* initialize card and LANCE for proper operation */
|
|
|
-
|
|
|
-static void InitBoard(struct net_device *dev)
|
|
|
-{
|
|
|
- skmca_priv *priv = netdev_priv(dev);
|
|
|
- LANCE_InitBlock block;
|
|
|
-
|
|
|
- /* Lay out the shared RAM - first we create the init block for the LANCE.
|
|
|
- We do not overwrite it later because we need it again when we switch
|
|
|
- promiscous mode on/off. */
|
|
|
-
|
|
|
- block.Mode = 0;
|
|
|
- if (dev->flags & IFF_PROMISC)
|
|
|
- block.Mode |= LANCE_INIT_PROM;
|
|
|
- memcpy(block.PAdr, dev->dev_addr, 6);
|
|
|
- memset(block.LAdrF, 0, sizeof(block.LAdrF));
|
|
|
- block.RdrP = (RAM_RXBASE & 0xffffff) | (LRXCOUNT << 29);
|
|
|
- block.TdrP = (RAM_TXBASE & 0xffffff) | (LTXCOUNT << 29);
|
|
|
-
|
|
|
- memcpy_toio(priv->base + RAM_INITBASE, &block, sizeof(block));
|
|
|
-
|
|
|
- /* initialize LANCE. Implicitly sets up other structures in RAM. */
|
|
|
-
|
|
|
- InitLANCE(dev);
|
|
|
-}
|
|
|
-
|
|
|
-/* deinitialize card and LANCE */
|
|
|
-
|
|
|
-static void DeinitBoard(struct net_device *dev)
|
|
|
-{
|
|
|
- /* stop LANCE */
|
|
|
-
|
|
|
- StopLANCE(dev);
|
|
|
-
|
|
|
- /* reset board */
|
|
|
-
|
|
|
- ResetBoard(dev);
|
|
|
-}
|
|
|
-
|
|
|
-/* probe for device's irq */
|
|
|
-
|
|
|
-static int __init ProbeIRQ(struct net_device *dev)
|
|
|
-{
|
|
|
- unsigned long imaskval, njiffies, irq;
|
|
|
- u16 csr0val;
|
|
|
-
|
|
|
- /* enable all interrupts */
|
|
|
-
|
|
|
- imaskval = probe_irq_on();
|
|
|
-
|
|
|
- /* initialize the board. Wait for interrupt 'Initialization done'. */
|
|
|
-
|
|
|
- ResetBoard(dev);
|
|
|
- InitBoard(dev);
|
|
|
-
|
|
|
- njiffies = jiffies + HZ;
|
|
|
- do {
|
|
|
- csr0val = GetLANCE(dev, LANCE_CSR0);
|
|
|
- }
|
|
|
- while (((csr0val & CSR0_IDON) == 0) && (jiffies != njiffies));
|
|
|
-
|
|
|
- /* turn of interrupts again */
|
|
|
-
|
|
|
- irq = probe_irq_off(imaskval);
|
|
|
-
|
|
|
- /* if we found something, ack the interrupt */
|
|
|
-
|
|
|
- if (irq)
|
|
|
- SetLANCE(dev, LANCE_CSR0, csr0val | CSR0_IDON);
|
|
|
-
|
|
|
- /* back to idle state */
|
|
|
-
|
|
|
- DeinitBoard(dev);
|
|
|
-
|
|
|
- return irq;
|
|
|
-}
|
|
|
-
|
|
|
-/* ------------------------------------------------------------------------
|
|
|
- * interrupt handler(s)
|
|
|
- * ------------------------------------------------------------------------ */
|
|
|
-
|
|
|
-/* LANCE has read initialization block -> start it */
|
|
|
-
|
|
|
-static u16 irqstart_handler(struct net_device *dev, u16 oldcsr0)
|
|
|
-{
|
|
|
- /* now we're ready to transmit */
|
|
|
-
|
|
|
- netif_wake_queue(dev);
|
|
|
-
|
|
|
- /* reset IDON bit, start LANCE */
|
|
|
-
|
|
|
- SetLANCE(dev, LANCE_CSR0, oldcsr0 | CSR0_IDON | CSR0_STRT);
|
|
|
- return GetLANCE(dev, LANCE_CSR0);
|
|
|
-}
|
|
|
-
|
|
|
-/* did we lose blocks due to a FIFO overrun ? */
|
|
|
-
|
|
|
-static u16 irqmiss_handler(struct net_device *dev, u16 oldcsr0)
|
|
|
-{
|
|
|
- skmca_priv *priv = netdev_priv(dev);
|
|
|
-
|
|
|
- /* update statistics */
|
|
|
-
|
|
|
- priv->stat.rx_fifo_errors++;
|
|
|
-
|
|
|
- /* reset MISS bit */
|
|
|
-
|
|
|
- SetLANCE(dev, LANCE_CSR0, oldcsr0 | CSR0_MISS);
|
|
|
- return GetLANCE(dev, LANCE_CSR0);
|
|
|
-}
|
|
|
-
|
|
|
-/* receive interrupt */
|
|
|
-
|
|
|
-static u16 irqrx_handler(struct net_device *dev, u16 oldcsr0)
|
|
|
-{
|
|
|
- skmca_priv *priv = netdev_priv(dev);
|
|
|
- LANCE_RxDescr descr;
|
|
|
- unsigned int descraddr;
|
|
|
-
|
|
|
- /* run through queue until we reach a descriptor we do not own */
|
|
|
-
|
|
|
- descraddr = RAM_RXBASE + (priv->nextrx * sizeof(LANCE_RxDescr));
|
|
|
- while (1) {
|
|
|
- /* read descriptor */
|
|
|
- memcpy_fromio(&descr, priv->base + descraddr,
|
|
|
- sizeof(LANCE_RxDescr));
|
|
|
-
|
|
|
- /* if we reach a descriptor we do not own, we're done */
|
|
|
- if ((descr.Flags & RXDSCR_FLAGS_OWN) != 0)
|
|
|
- break;
|
|
|
-
|
|
|
-#ifdef DEBUG
|
|
|
- PrTime();
|
|
|
- printk("Receive packet on descr %d len %d\n", priv->nextrx,
|
|
|
- descr.Len);
|
|
|
-#endif
|
|
|
-
|
|
|
- /* erroneous packet ? */
|
|
|
- if ((descr.Flags & RXDSCR_FLAGS_ERR) != 0) {
|
|
|
- priv->stat.rx_errors++;
|
|
|
- if ((descr.Flags & RXDSCR_FLAGS_CRC) != 0)
|
|
|
- priv->stat.rx_crc_errors++;
|
|
|
- else if ((descr.Flags & RXDSCR_FLAGS_CRC) != 0)
|
|
|
- priv->stat.rx_frame_errors++;
|
|
|
- else if ((descr.Flags & RXDSCR_FLAGS_OFLO) != 0)
|
|
|
- priv->stat.rx_fifo_errors++;
|
|
|
- }
|
|
|
-
|
|
|
- /* good packet ? */
|
|
|
- else {
|
|
|
- struct sk_buff *skb;
|
|
|
-
|
|
|
- skb = dev_alloc_skb(descr.Len + 2);
|
|
|
- if (skb == NULL)
|
|
|
- priv->stat.rx_dropped++;
|
|
|
- else {
|
|
|
- memcpy_fromio(skb_put(skb, descr.Len),
|
|
|
- priv->base +
|
|
|
- descr.LowAddr, descr.Len);
|
|
|
- skb->dev = dev;
|
|
|
- skb->protocol = eth_type_trans(skb, dev);
|
|
|
- skb->ip_summed = CHECKSUM_NONE;
|
|
|
- priv->stat.rx_packets++;
|
|
|
- priv->stat.rx_bytes += descr.Len;
|
|
|
- netif_rx(skb);
|
|
|
- dev->last_rx = jiffies;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* give descriptor back to LANCE */
|
|
|
- descr.Len = 0;
|
|
|
- descr.Flags |= RXDSCR_FLAGS_OWN;
|
|
|
-
|
|
|
- /* update descriptor in shared RAM */
|
|
|
- memcpy_toio(priv->base + descraddr, &descr,
|
|
|
- sizeof(LANCE_RxDescr));
|
|
|
-
|
|
|
- /* go to next descriptor */
|
|
|
- priv->nextrx++;
|
|
|
- descraddr += sizeof(LANCE_RxDescr);
|
|
|
- if (priv->nextrx >= RXCOUNT) {
|
|
|
- priv->nextrx = 0;
|
|
|
- descraddr = RAM_RXBASE;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* reset RINT bit */
|
|
|
-
|
|
|
- SetLANCE(dev, LANCE_CSR0, oldcsr0 | CSR0_RINT);
|
|
|
- return GetLANCE(dev, LANCE_CSR0);
|
|
|
-}
|
|
|
-
|
|
|
-/* transmit interrupt */
|
|
|
-
|
|
|
-static u16 irqtx_handler(struct net_device *dev, u16 oldcsr0)
|
|
|
-{
|
|
|
- skmca_priv *priv = netdev_priv(dev);
|
|
|
- LANCE_TxDescr descr;
|
|
|
- unsigned int descraddr;
|
|
|
-
|
|
|
- /* check descriptors at most until no busy one is left */
|
|
|
-
|
|
|
- descraddr =
|
|
|
- RAM_TXBASE + (priv->nexttxdone * sizeof(LANCE_TxDescr));
|
|
|
- while (priv->txbusy > 0) {
|
|
|
- /* read descriptor */
|
|
|
- memcpy_fromio(&descr, priv->base + descraddr,
|
|
|
- sizeof(LANCE_TxDescr));
|
|
|
-
|
|
|
- /* if the LANCE still owns this one, we've worked out all sent packets */
|
|
|
- if ((descr.Flags & TXDSCR_FLAGS_OWN) != 0)
|
|
|
- break;
|
|
|
-
|
|
|
-#ifdef DEBUG
|
|
|
- PrTime();
|
|
|
- printk("Send packet done on descr %d\n", priv->nexttxdone);
|
|
|
-#endif
|
|
|
-
|
|
|
- /* update statistics */
|
|
|
- if ((descr.Flags & TXDSCR_FLAGS_ERR) == 0) {
|
|
|
- priv->stat.tx_packets++;
|
|
|
- priv->stat.tx_bytes++;
|
|
|
- } else {
|
|
|
- priv->stat.tx_errors++;
|
|
|
- if ((descr.Status & TXDSCR_STATUS_UFLO) != 0) {
|
|
|
- priv->stat.tx_fifo_errors++;
|
|
|
- InitLANCE(dev);
|
|
|
- }
|
|
|
- else
|
|
|
- if ((descr.Status & TXDSCR_STATUS_LCOL) !=
|
|
|
- 0) priv->stat.tx_window_errors++;
|
|
|
- else if ((descr.Status & TXDSCR_STATUS_LCAR) != 0)
|
|
|
- priv->stat.tx_carrier_errors++;
|
|
|
- else if ((descr.Status & TXDSCR_STATUS_RTRY) != 0)
|
|
|
- priv->stat.tx_aborted_errors++;
|
|
|
- }
|
|
|
-
|
|
|
- /* go to next descriptor */
|
|
|
- priv->nexttxdone++;
|
|
|
- descraddr += sizeof(LANCE_TxDescr);
|
|
|
- if (priv->nexttxdone >= TXCOUNT) {
|
|
|
- priv->nexttxdone = 0;
|
|
|
- descraddr = RAM_TXBASE;
|
|
|
- }
|
|
|
- priv->txbusy--;
|
|
|
- }
|
|
|
-
|
|
|
- /* reset TX interrupt bit */
|
|
|
-
|
|
|
- SetLANCE(dev, LANCE_CSR0, oldcsr0 | CSR0_TINT);
|
|
|
- oldcsr0 = GetLANCE(dev, LANCE_CSR0);
|
|
|
-
|
|
|
- /* at least one descriptor is freed. Therefore we can accept
|
|
|
- a new one */
|
|
|
- /* inform upper layers we're in business again */
|
|
|
-
|
|
|
- netif_wake_queue(dev);
|
|
|
-
|
|
|
- return oldcsr0;
|
|
|
-}
|
|
|
-
|
|
|
-/* general interrupt entry */
|
|
|
-
|
|
|
-static irqreturn_t irq_handler(int irq, void *device)
|
|
|
-{
|
|
|
- struct net_device *dev = (struct net_device *) device;
|
|
|
- u16 csr0val;
|
|
|
-
|
|
|
- /* read CSR0 to get interrupt cause */
|
|
|
-
|
|
|
- csr0val = GetLANCE(dev, LANCE_CSR0);
|
|
|
-
|
|
|
- /* in case we're not meant... */
|
|
|
-
|
|
|
- if ((csr0val & CSR0_INTR) == 0)
|
|
|
- return IRQ_NONE;
|
|
|
-
|
|
|
-#if 0
|
|
|
- set_bit(LINK_STATE_RXSEM, &dev->state);
|
|
|
-#endif
|
|
|
-
|
|
|
- /* loop through the interrupt bits until everything is clear */
|
|
|
-
|
|
|
- do {
|
|
|
- if ((csr0val & CSR0_IDON) != 0)
|
|
|
- csr0val = irqstart_handler(dev, csr0val);
|
|
|
- if ((csr0val & CSR0_RINT) != 0)
|
|
|
- csr0val = irqrx_handler(dev, csr0val);
|
|
|
- if ((csr0val & CSR0_MISS) != 0)
|
|
|
- csr0val = irqmiss_handler(dev, csr0val);
|
|
|
- if ((csr0val & CSR0_TINT) != 0)
|
|
|
- csr0val = irqtx_handler(dev, csr0val);
|
|
|
- if ((csr0val & CSR0_MERR) != 0) {
|
|
|
- SetLANCE(dev, LANCE_CSR0, csr0val | CSR0_MERR);
|
|
|
- csr0val = GetLANCE(dev, LANCE_CSR0);
|
|
|
- }
|
|
|
- if ((csr0val & CSR0_BABL) != 0) {
|
|
|
- SetLANCE(dev, LANCE_CSR0, csr0val | CSR0_BABL);
|
|
|
- csr0val = GetLANCE(dev, LANCE_CSR0);
|
|
|
- }
|
|
|
- }
|
|
|
- while ((csr0val & CSR0_INTR) != 0);
|
|
|
-
|
|
|
-#if 0
|
|
|
- clear_bit(LINK_STATE_RXSEM, &dev->state);
|
|
|
-#endif
|
|
|
- return IRQ_HANDLED;
|
|
|
-}
|
|
|
-
|
|
|
-/* ------------------------------------------------------------------------
|
|
|
- * driver methods
|
|
|
- * ------------------------------------------------------------------------ */
|
|
|
-
|
|
|
-/* MCA info */
|
|
|
-
|
|
|
-static int skmca_getinfo(char *buf, int slot, void *d)
|
|
|
-{
|
|
|
- int len = 0, i;
|
|
|
- struct net_device *dev = (struct net_device *) d;
|
|
|
- skmca_priv *priv;
|
|
|
-
|
|
|
- /* can't say anything about an uninitialized device... */
|
|
|
-
|
|
|
- if (dev == NULL)
|
|
|
- return len;
|
|
|
- priv = netdev_priv(dev);
|
|
|
-
|
|
|
- /* print info */
|
|
|
-
|
|
|
- len += sprintf(buf + len, "IRQ: %d\n", priv->realirq);
|
|
|
- len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start,
|
|
|
- dev->mem_end - 1);
|
|
|
- len +=
|
|
|
- sprintf(buf + len, "Transceiver: %s\n",
|
|
|
- MediaNames[priv->medium]);
|
|
|
- len += sprintf(buf + len, "Device: %s\n", dev->name);
|
|
|
- len += sprintf(buf + len, "MAC address:");
|
|
|
- for (i = 0; i < 6; i++)
|
|
|
- len += sprintf(buf + len, " %02x", dev->dev_addr[i]);
|
|
|
- buf[len++] = '\n';
|
|
|
- buf[len] = 0;
|
|
|
-
|
|
|
- return len;
|
|
|
-}
|
|
|
-
|
|
|
-/* open driver. Means also initialization and start of LANCE */
|
|
|
-
|
|
|
-static int skmca_open(struct net_device *dev)
|
|
|
-{
|
|
|
- int result;
|
|
|
- skmca_priv *priv = netdev_priv(dev);
|
|
|
-
|
|
|
- /* register resources - only necessary for IRQ */
|
|
|
- result =
|
|
|
- request_irq(priv->realirq, irq_handler,
|
|
|
- IRQF_SHARED | IRQF_SAMPLE_RANDOM, "sk_mca", dev);
|
|
|
- if (result != 0) {
|
|
|
- printk("%s: failed to register irq %d\n", dev->name,
|
|
|
- dev->irq);
|
|
|
- return result;
|
|
|
- }
|
|
|
- dev->irq = priv->realirq;
|
|
|
-
|
|
|
- /* set up the card and LANCE */
|
|
|
-
|
|
|
- InitBoard(dev);
|
|
|
-
|
|
|
- /* set up flags */
|
|
|
-
|
|
|
- netif_start_queue(dev);
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/* close driver. Shut down board and free allocated resources */
|
|
|
-
|
|
|
-static int skmca_close(struct net_device *dev)
|
|
|
-{
|
|
|
- /* turn off board */
|
|
|
- DeinitBoard(dev);
|
|
|
-
|
|
|
- /* release resources */
|
|
|
- if (dev->irq != 0)
|
|
|
- free_irq(dev->irq, dev);
|
|
|
- dev->irq = 0;
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/* transmit a block. */
|
|
|
-
|
|
|
-static int skmca_tx(struct sk_buff *skb, struct net_device *dev)
|
|
|
-{
|
|
|
- skmca_priv *priv = netdev_priv(dev);
|
|
|
- LANCE_TxDescr descr;
|
|
|
- unsigned int address;
|
|
|
- int tmplen, retval = 0;
|
|
|
- unsigned long flags;
|
|
|
-
|
|
|
- /* if we get called with a NULL descriptor, the Ethernet layer thinks
|
|
|
- our card is stuck an we should reset it. We'll do this completely: */
|
|
|
-
|
|
|
- if (skb == NULL) {
|
|
|
- DeinitBoard(dev);
|
|
|
- InitBoard(dev);
|
|
|
- return 0; /* don't try to free the block here ;-) */
|
|
|
- }
|
|
|
-
|
|
|
- /* is there space in the Tx queue ? If no, the upper layer gave us a
|
|
|
- packet in spite of us not being ready and is really in trouble.
|
|
|
- We'll do the dropping for him: */
|
|
|
- if (priv->txbusy >= TXCOUNT) {
|
|
|
- priv->stat.tx_dropped++;
|
|
|
- retval = -EIO;
|
|
|
- goto tx_done;
|
|
|
- }
|
|
|
-
|
|
|
- /* get TX descriptor */
|
|
|
- address = RAM_TXBASE + (priv->nexttxput * sizeof(LANCE_TxDescr));
|
|
|
- memcpy_fromio(&descr, priv->base + address, sizeof(LANCE_TxDescr));
|
|
|
-
|
|
|
- /* enter packet length as 2s complement - assure minimum length */
|
|
|
- tmplen = skb->len;
|
|
|
- if (tmplen < 60)
|
|
|
- tmplen = 60;
|
|
|
- descr.Len = 65536 - tmplen;
|
|
|
-
|
|
|
- /* copy filler into RAM - in case we're filling up...
|
|
|
- we're filling a bit more than necessary, but that doesn't harm
|
|
|
- since the buffer is far larger... */
|
|
|
- if (tmplen > skb->len) {
|
|
|
- char *fill = "NetBSD is a nice OS too! ";
|
|
|
- unsigned int destoffs = 0, l = strlen(fill);
|
|
|
-
|
|
|
- while (destoffs < tmplen) {
|
|
|
- memcpy_toio(priv->base + descr.LowAddr +
|
|
|
- destoffs, fill, l);
|
|
|
- destoffs += l;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* do the real data copying */
|
|
|
- memcpy_toio(priv->base + descr.LowAddr, skb->data, skb->len);
|
|
|
-
|
|
|
- /* hand descriptor over to LANCE - this is the first and last chunk */
|
|
|
- descr.Flags =
|
|
|
- TXDSCR_FLAGS_OWN | TXDSCR_FLAGS_STP | TXDSCR_FLAGS_ENP;
|
|
|
-
|
|
|
-#ifdef DEBUG
|
|
|
- PrTime();
|
|
|
- printk("Send packet on descr %d len %d\n", priv->nexttxput,
|
|
|
- skb->len);
|
|
|
-#endif
|
|
|
-
|
|
|
- /* one more descriptor busy */
|
|
|
-
|
|
|
- spin_lock_irqsave(&priv->lock, flags);
|
|
|
-
|
|
|
- priv->nexttxput++;
|
|
|
- if (priv->nexttxput >= TXCOUNT)
|
|
|
- priv->nexttxput = 0;
|
|
|
- priv->txbusy++;
|
|
|
-
|
|
|
- /* are we saturated ? */
|
|
|
-
|
|
|
- if (priv->txbusy >= TXCOUNT)
|
|
|
- netif_stop_queue(dev);
|
|
|
-
|
|
|
- /* write descriptor back to RAM */
|
|
|
- memcpy_toio(priv->base + address, &descr, sizeof(LANCE_TxDescr));
|
|
|
-
|
|
|
- /* if no descriptors were active, give the LANCE a hint to read it
|
|
|
- immediately */
|
|
|
-
|
|
|
- if (priv->txbusy == 0)
|
|
|
- SetLANCE(dev, LANCE_CSR0, CSR0_INEA | CSR0_TDMD);
|
|
|
-
|
|
|
- spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
-
|
|
|
- tx_done:
|
|
|
-
|
|
|
- dev_kfree_skb(skb);
|
|
|
-
|
|
|
- return retval;
|
|
|
-}
|
|
|
-
|
|
|
-/* return pointer to Ethernet statistics */
|
|
|
-
|
|
|
-static struct net_device_stats *skmca_stats(struct net_device *dev)
|
|
|
-{
|
|
|
- skmca_priv *priv = netdev_priv(dev);
|
|
|
-
|
|
|
- return &(priv->stat);
|
|
|
-}
|
|
|
-
|
|
|
-/* switch receiver mode. We use the LANCE's multicast filter to prefilter
|
|
|
- multicast addresses. */
|
|
|
-
|
|
|
-static void skmca_set_multicast_list(struct net_device *dev)
|
|
|
-{
|
|
|
- skmca_priv *priv = netdev_priv(dev);
|
|
|
- LANCE_InitBlock block;
|
|
|
-
|
|
|
- /* first stop the LANCE... */
|
|
|
- StopLANCE(dev);
|
|
|
-
|
|
|
- /* ...then modify the initialization block... */
|
|
|
- memcpy_fromio(&block, priv->base + RAM_INITBASE, sizeof(block));
|
|
|
- if (dev->flags & IFF_PROMISC)
|
|
|
- block.Mode |= LANCE_INIT_PROM;
|
|
|
- else
|
|
|
- block.Mode &= ~LANCE_INIT_PROM;
|
|
|
-
|
|
|
- if (dev->flags & IFF_ALLMULTI) { /* get all multicasts */
|
|
|
- memset(block.LAdrF, 0xff, sizeof(block.LAdrF));
|
|
|
- } else { /* get selected/no multicasts */
|
|
|
-
|
|
|
- struct dev_mc_list *mptr;
|
|
|
- int code;
|
|
|
-
|
|
|
- memset(block.LAdrF, 0, sizeof(block.LAdrF));
|
|
|
- for (mptr = dev->mc_list; mptr != NULL; mptr = mptr->next) {
|
|
|
- code = GetHash(mptr->dmi_addr);
|
|
|
- block.LAdrF[(code >> 3) & 7] |= 1 << (code & 7);
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- memcpy_toio(priv->base + RAM_INITBASE, &block, sizeof(block));
|
|
|
-
|
|
|
- /* ...then reinit LANCE with the correct flags */
|
|
|
- InitLANCE(dev);
|
|
|
-}
|
|
|
-
|
|
|
-/* ------------------------------------------------------------------------
|
|
|
- * hardware check
|
|
|
- * ------------------------------------------------------------------------ */
|
|
|
-
|
|
|
-static int startslot; /* counts through slots when probing multiple devices */
|
|
|
-
|
|
|
-static void cleanup_card(struct net_device *dev)
|
|
|
-{
|
|
|
- skmca_priv *priv = netdev_priv(dev);
|
|
|
- DeinitBoard(dev);
|
|
|
- if (dev->irq != 0)
|
|
|
- free_irq(dev->irq, dev);
|
|
|
- iounmap(priv->base);
|
|
|
- mca_mark_as_unused(priv->slot);
|
|
|
- mca_set_adapter_procfn(priv->slot, NULL, NULL);
|
|
|
-}
|
|
|
-
|
|
|
-struct net_device * __init skmca_probe(int unit)
|
|
|
-{
|
|
|
- struct net_device *dev;
|
|
|
- int force_detect = 0;
|
|
|
- int junior, slot, i;
|
|
|
- int base = 0, irq = 0;
|
|
|
- skmca_priv *priv;
|
|
|
- skmca_medium medium;
|
|
|
- int err;
|
|
|
-
|
|
|
- /* can't work without an MCA bus ;-) */
|
|
|
-
|
|
|
- if (MCA_bus == 0)
|
|
|
- return ERR_PTR(-ENODEV);
|
|
|
-
|
|
|
- dev = alloc_etherdev(sizeof(skmca_priv));
|
|
|
- if (!dev)
|
|
|
- return ERR_PTR(-ENOMEM);
|
|
|
-
|
|
|
- if (unit >= 0) {
|
|
|
- sprintf(dev->name, "eth%d", unit);
|
|
|
- netdev_boot_setup_check(dev);
|
|
|
- }
|
|
|
-
|
|
|
- SET_MODULE_OWNER(dev);
|
|
|
-
|
|
|
- /* start address of 1 --> forced detection */
|
|
|
-
|
|
|
- if (dev->mem_start == 1)
|
|
|
- force_detect = 1;
|
|
|
-
|
|
|
- /* search through slots */
|
|
|
-
|
|
|
- base = dev->mem_start;
|
|
|
- irq = dev->base_addr;
|
|
|
- for (slot = startslot; (slot = dofind(&junior, slot)) != -1; slot++) {
|
|
|
- /* deduce card addresses */
|
|
|
-
|
|
|
- getaddrs(slot, junior, &base, &irq, &medium);
|
|
|
-
|
|
|
- /* slot already in use ? */
|
|
|
-
|
|
|
- if (mca_is_adapter_used(slot))
|
|
|
- continue;
|
|
|
-
|
|
|
- /* were we looking for something different ? */
|
|
|
-
|
|
|
- if (dev->irq && dev->irq != irq)
|
|
|
- continue;
|
|
|
- if (dev->mem_start && dev->mem_start != base)
|
|
|
- continue;
|
|
|
-
|
|
|
- /* found something that matches */
|
|
|
-
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- /* nothing found ? */
|
|
|
-
|
|
|
- if (slot == -1) {
|
|
|
- free_netdev(dev);
|
|
|
- return (base || irq) ? ERR_PTR(-ENXIO) : ERR_PTR(-ENODEV);
|
|
|
- }
|
|
|
-
|
|
|
- /* make procfs entries */
|
|
|
-
|
|
|
- if (junior)
|
|
|
- mca_set_adapter_name(slot,
|
|
|
- "SKNET junior MC2 Ethernet Adapter");
|
|
|
- else
|
|
|
- mca_set_adapter_name(slot, "SKNET MC2+ Ethernet Adapter");
|
|
|
- mca_set_adapter_procfn(slot, (MCA_ProcFn) skmca_getinfo, dev);
|
|
|
-
|
|
|
- mca_mark_as_used(slot);
|
|
|
-
|
|
|
- /* announce success */
|
|
|
- printk("%s: SKNet %s adapter found in slot %d\n", dev->name,
|
|
|
- junior ? "Junior MC2" : "MC2+", slot + 1);
|
|
|
-
|
|
|
- priv = netdev_priv(dev);
|
|
|
- priv->base = ioremap(base, 0x4000);
|
|
|
- if (!priv->base) {
|
|
|
- mca_set_adapter_procfn(slot, NULL, NULL);
|
|
|
- mca_mark_as_unused(slot);
|
|
|
- free_netdev(dev);
|
|
|
- return ERR_PTR(-ENOMEM);
|
|
|
- }
|
|
|
-
|
|
|
- priv->slot = slot;
|
|
|
- priv->macbase = priv->base + 0x3fc0;
|
|
|
- priv->ioregaddr = priv->base + 0x3ff0;
|
|
|
- priv->ctrladdr = priv->base + 0x3ff2;
|
|
|
- priv->cmdaddr = priv->base + 0x3ff3;
|
|
|
- priv->medium = medium;
|
|
|
- memset(&priv->stat, 0, sizeof(struct net_device_stats));
|
|
|
- spin_lock_init(&priv->lock);
|
|
|
-
|
|
|
- /* set base + irq for this device (irq not allocated so far) */
|
|
|
- dev->irq = 0;
|
|
|
- dev->mem_start = base;
|
|
|
- dev->mem_end = base + 0x4000;
|
|
|
-
|
|
|
- /* autoprobe ? */
|
|
|
- if (irq < 0) {
|
|
|
- int nirq;
|
|
|
-
|
|
|
- printk
|
|
|
- ("%s: ambigous POS bit combination, must probe for IRQ...\n",
|
|
|
- dev->name);
|
|
|
- nirq = ProbeIRQ(dev);
|
|
|
- if (nirq <= 0)
|
|
|
- printk("%s: IRQ probe failed, assuming IRQ %d",
|
|
|
- dev->name, priv->realirq = -irq);
|
|
|
- else
|
|
|
- priv->realirq = nirq;
|
|
|
- } else
|
|
|
- priv->realirq = irq;
|
|
|
-
|
|
|
- /* set methods */
|
|
|
- dev->open = skmca_open;
|
|
|
- dev->stop = skmca_close;
|
|
|
- dev->hard_start_xmit = skmca_tx;
|
|
|
- dev->do_ioctl = NULL;
|
|
|
- dev->get_stats = skmca_stats;
|
|
|
- dev->set_multicast_list = skmca_set_multicast_list;
|
|
|
- dev->flags |= IFF_MULTICAST;
|
|
|
-
|
|
|
- /* copy out MAC address */
|
|
|
- for (i = 0; i < 6; i++)
|
|
|
- dev->dev_addr[i] = readb(priv->macbase + (i << 1));
|
|
|
-
|
|
|
- /* print config */
|
|
|
- printk("%s: IRQ %d, memory %#lx-%#lx, "
|
|
|
- "MAC address %02x:%02x:%02x:%02x:%02x:%02x.\n",
|
|
|
- dev->name, priv->realirq, dev->mem_start, dev->mem_end - 1,
|
|
|
- dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
|
|
|
- dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
|
|
|
- printk("%s: %s medium\n", dev->name, MediaNames[priv->medium]);
|
|
|
-
|
|
|
- /* reset board */
|
|
|
-
|
|
|
- ResetBoard(dev);
|
|
|
-
|
|
|
- startslot = slot + 1;
|
|
|
-
|
|
|
- err = register_netdev(dev);
|
|
|
- if (err) {
|
|
|
- cleanup_card(dev);
|
|
|
- free_netdev(dev);
|
|
|
- dev = ERR_PTR(err);
|
|
|
- }
|
|
|
- return dev;
|
|
|
-}
|
|
|
-
|
|
|
-/* ------------------------------------------------------------------------
|
|
|
- * modularization support
|
|
|
- * ------------------------------------------------------------------------ */
|
|
|
-
|
|
|
-#ifdef MODULE
|
|
|
-MODULE_LICENSE("GPL");
|
|
|
-
|
|
|
-#define DEVMAX 5
|
|
|
-
|
|
|
-static struct net_device *moddevs[DEVMAX];
|
|
|
-
|
|
|
-int init_module(void)
|
|
|
-{
|
|
|
- int z;
|
|
|
-
|
|
|
- startslot = 0;
|
|
|
- for (z = 0; z < DEVMAX; z++) {
|
|
|
- struct net_device *dev = skmca_probe(-1);
|
|
|
- if (IS_ERR(dev))
|
|
|
- break;
|
|
|
- moddevs[z] = dev;
|
|
|
- }
|
|
|
- if (!z)
|
|
|
- return -EIO;
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-void cleanup_module(void)
|
|
|
-{
|
|
|
- int z;
|
|
|
-
|
|
|
- for (z = 0; z < DEVMAX; z++) {
|
|
|
- struct net_device *dev = moddevs[z];
|
|
|
- if (dev) {
|
|
|
- unregister_netdev(dev);
|
|
|
- cleanup_card(dev);
|
|
|
- free_netdev(dev);
|
|
|
- }
|
|
|
- }
|
|
|
-}
|
|
|
-#endif /* MODULE */
|
Adrian Bunk