litmus-rt.git - The LITMUS^RT kernel.

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author	Linus Torvalds <torvalds@linux-foundation.org>	2008-12-03 19:45:56 -0500
committer	Linus Torvalds <torvalds@linux-foundation.org>	2008-12-03 19:45:56 -0500
commit	feaf3848a813a106f163013af6fcf6c4bfec92d9 (patch)
tree	a5b2db24fa361e96efb64442f48e463154a66f8b /net/unix/af_unix.c
parent	a771132783d3f78a51597fdcee96c6dfbae3512e (diff)
parent	0e435ac26e3f951d83338ed3d4ab7dc0fe0055bc (diff)

Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block: block: fix setting of max_segment_size and seg_boundary mask block: internal dequeue shouldn't start timer block: set disk->node_id before it's being used When block layer fails to map iov, it calls bio_unmap_user to undo

Diffstat (limited to 'net/unix/af_unix.c')

0 files changed, 0 insertions, 0 deletions

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/*****************************************************************************/ /* * baycom_par.c -- baycom par96 and picpar radio modem driver. * * Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Please note that the GPL allows you to use the driver, NOT the radio. * In order to use the radio, you need a license from the communications * authority of your country. * * * Supported modems * * par96: This is a modem for 9600 baud FSK compatible to the G3RUH standard. * The modem does all the filtering and regenerates the receiver clock. * Data is transferred from and to the PC via a shift register. * The shift register is filled with 16 bits and an interrupt is * signalled. The PC then empties the shift register in a burst. This * modem connects to the parallel port, hence the name. The modem * leaves the implementation of the HDLC protocol and the scrambler * polynomial to the PC. This modem is no longer available (at least * from Baycom) and has been replaced by the PICPAR modem (see below). * You may however still build one from the schematics published in * cq-DL :-). * * picpar: This is a redesign of the par96 modem by Henning Rech, DF9IC. The * modem is protocol compatible to par96, but uses only three low * power ICs and can therefore be fed from the parallel port and * does not require an additional power supply. It features * built in DCD circuitry. The driver should therefore be configured * for hardware DCD. * * * Command line options (insmod command line) * * mode driver mode string. Valid choices are par96 and picpar. * iobase base address of the port; common values are 0x378, 0x278, 0x3bc * * * History: * 0.1 26.06.1996 Adapted from baycom.c and made network driver interface * 18.10.1996 Changed to new user space access routines (copy_{to,from}_user) * 0.3 26.04.1997 init code/data tagged * 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints) * 0.5 11.11.1997 split into separate files for ser12/par96 * 0.6 03.08.1999 adapt to Linus' new __setup/__initcall * removed some pre-2.2 kernel compatibility cruft * 0.7 10.08.1999 Check if parport can do SPP and is safe to access during interrupt contexts * 0.8 12.02.2000 adapted to softnet driver interface * removed direct parport access, uses parport driver methods * 0.9 03.07.2000 fix interface name handling */ /*****************************************************************************/ #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/fcntl.h> #include <linux/interrupt.h> #include <linux/ioport.h> #include <linux/in.h> #include <linux/string.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/netdevice.h> #include <linux/hdlcdrv.h> #include <linux/baycom.h> #include <linux/parport.h> #include <linux/bitops.h> #include <linux/jiffies.h> #include <asm/system.h> #include <asm/uaccess.h> /* --------------------------------------------------------------------- */ #define BAYCOM_DEBUG /* * modem options; bit mask */ #define BAYCOM_OPTIONS_SOFTDCD 1 /* --------------------------------------------------------------------- */ static const char bc_drvname[] = "baycom_par"; static const char bc_drvinfo[] = KERN_INFO "baycom_par: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n" KERN_INFO "baycom_par: version 0.9 compiled " __TIME__ " " __DATE__ "\n"; /* --------------------------------------------------------------------- */ #define NR_PORTS 4 static struct net_device *baycom_device[NR_PORTS]; /* --------------------------------------------------------------------- */ #define PAR96_BURSTBITS 16 #define PAR96_BURST 4 #define PAR96_PTT 2 #define PAR96_TXBIT 1 #define PAR96_ACK 0x40 #define PAR96_RXBIT 0x20 #define PAR96_DCD 0x10 #define PAR97_POWER 0xf8 /* ---------------------------------------------------------------------- */ /* * Information that need to be kept for each board. */ struct baycom_state { struct hdlcdrv_state hdrv; struct pardevice *pdev; unsigned int options; struct modem_state { short arb_divider; unsigned char flags; unsigned int shreg; struct modem_state_par96 { int dcd_count; unsigned int dcd_shreg; unsigned long descram; unsigned long scram; } par96; } modem; #ifdef BAYCOM_DEBUG struct debug_vals { unsigned long last_jiffies; unsigned cur_intcnt; unsigned last_intcnt; int cur_pllcorr; int last_pllcorr; } debug_vals; #endif /* BAYCOM_DEBUG */ }; /* --------------------------------------------------------------------- */ static void __inline__ baycom_int_freq(struct baycom_state *bc) { #ifdef BAYCOM_DEBUG unsigned long cur_jiffies = jiffies; /* * measure the interrupt frequency */ bc->debug_vals.cur_intcnt++; if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { bc->debug_vals.last_jiffies = cur_jiffies; bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; bc->debug_vals.cur_intcnt = 0; bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; bc->debug_vals.cur_pllcorr = 0; } #endif /* BAYCOM_DEBUG */ } /* --------------------------------------------------------------------- */ /* * ===================== PAR96 specific routines ========================= */ #define PAR96_DESCRAM_TAP1 0x20000 #define PAR96_DESCRAM_TAP2 0x01000 #define PAR96_DESCRAM_TAP3 0x00001 #define PAR96_DESCRAM_TAPSH1 17 #define PAR96_DESCRAM_TAPSH2 12 #define PAR96_DESCRAM_TAPSH3 0 #define PAR96_SCRAM_TAP1 0x20000 /* X^17 */ #define PAR96_SCRAM_TAPN 0x00021 /* X^0+X^5 */ /* --------------------------------------------------------------------- */ static __inline__ void par96_tx(struct net_device *dev, struct baycom_state *bc) { int i; unsigned int data = hdlcdrv_getbits(&bc->hdrv); struct parport *pp = bc->pdev->port; for(i = 0; i < PAR96_BURSTBITS; i++, data >>= 1) { unsigned char val = PAR97_POWER; bc->modem.par96.scram = ((bc->modem.par96.scram << 1) | (bc->modem.par96.scram & 1)); if (!(data & 1)) bc->modem.par96.scram ^= 1; if (bc->modem.par96.scram & (PAR96_SCRAM_TAP1 << 1)) bc->modem.par96.scram ^= (PAR96_SCRAM_TAPN << 1); if (bc->modem.par96.scram & (PAR96_SCRAM_TAP1 << 2)) val |= PAR96_TXBIT; pp->ops->write_data(pp, val); pp->ops->write_data(pp, val | PAR96_BURST); } } /* --------------------------------------------------------------------- */ static __inline__ void par96_rx(struct net_device *dev, struct baycom_state *bc) {


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