drivers/char/ftape/lowlevel/ftape-init.c

   1 /*
   2  *      Copyright (C) 1993-1996 Bas Laarhoven,
   3  *                (C) 1996-1997 Claus-Justus Heine.
   4
   5  This program is free software; you can redistribute it and/or modify
   6  it under the terms of the GNU General Public License as published by
   7  the Free Software Foundation; either version 2, or (at your option)
   8  any later version.
   9
  10  This program is distributed in the hope that it will be useful,
  11  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  GNU General Public License for more details.
  14
  15  You should have received a copy of the GNU General Public License
  16  along with this program; see the file COPYING.  If not, write to
  17  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19  *
  20  *      This file contains the code that interfaces the kernel
  21  *      for the QIC-40/80/3010/3020 floppy-tape driver for Linux.
  22  */
  23
  24 #include <linux/config.h>
  25 #include <linux/module.h>
  26 #include <linux/errno.h>
  27 #include <linux/fs.h>
  28 #include <linux/kernel.h>
  29 #include <linux/signal.h>
  30 #include <linux/major.h>
  31
  32 #include <linux/ftape.h>
  33 #include <linux/init.h>
  34 #include <linux/qic117.h>
  35 #ifdef CONFIG_ZFTAPE
  36 #include <linux/zftape.h>
  37 #endif
  38
  39 #include "../lowlevel/ftape-init.h"
  40 #include "../lowlevel/ftape-io.h"
  41 #include "../lowlevel/ftape-read.h"
  42 #include "../lowlevel/ftape-write.h"
  43 #include "../lowlevel/ftape-ctl.h"
  44 #include "../lowlevel/ftape-rw.h"
  45 #include "../lowlevel/fdc-io.h"
  46 #include "../lowlevel/ftape-buffer.h"
  47 #include "../lowlevel/ftape-proc.h"
  48 #include "../lowlevel/ftape-tracing.h"
  49
  50
  51 #if defined(MODULE) && !defined(CONFIG_FT_NO_TRACE_AT_ALL)
  52 static int ft_tracing = -1;
  53 #endif
  54
  55
  56 /*  Called by modules package when installing the driver
  57  *  or by kernel during the initialization phase
  58  */
  59 static int __init ftape_init(void)
  60 {
  61         TRACE_FUN(ft_t_flow);
  62
  63 #ifdef MODULE
  64 #ifndef CONFIG_FT_NO_TRACE_AT_ALL
  65         if (ft_tracing != -1) {
  66                 ftape_tracing = ft_tracing;
  67         }
  68 #endif
  69         printk(KERN_INFO FTAPE_VERSION "\n");
  70         if (TRACE_LEVEL >= ft_t_info) {
  71                 printk(
  72 KERN_INFO "(c) 1993-1996 Bas Laarhoven (bas@vimec.nl)\n"
  73 KERN_INFO "(c) 1995-1996 Kai Harrekilde-Petersen (khp@dolphinics.no)\n"
  74 KERN_INFO "(c) 1996-1997 Claus-Justus Heine (claus@momo.math.rwth-aachen.de)\n"
  75 KERN_INFO "QIC-117 driver for QIC-40/80/3010/3020 floppy tape drives\n");
  76         }
  77 #else /* !MODULE */
  78         /* print a short no-nonsense boot message */
  79         printk(KERN_INFO FTAPE_VERSION "\n");
  80 #endif /* MODULE */
  81         TRACE(ft_t_info, "installing QIC-117 floppy tape hardware drive ... ");
  82         TRACE(ft_t_info, "ftape_init @ 0x%p", ftape_init);
  83         /*  Allocate the DMA buffers. They are deallocated at cleanup() time.
  84          */
  85 #ifdef TESTING
  86 #ifdef MODULE
  87         while (ftape_set_nr_buffers(CONFIG_FT_NR_BUFFERS) < 0) {
  88                 ftape_sleep(FT_SECOND/20);
  89                 if (signal_pending(current)) {
  90                         (void)ftape_set_nr_buffers(0);
  91                         TRACE(ft_t_bug,
  92                               "Killed by signal while allocating buffers.");
  93                         TRACE_ABORT(-EINTR,
  94                                     ft_t_bug, "Free up memory and retry");
  95                 }
  96         }
  97 #else
  98         TRACE_CATCH(ftape_set_nr_buffers(CONFIG_FT_NR_BUFFERS),
  99                     (void)ftape_set_nr_buffers(0));
 100 #endif
 101 #else
 102         TRACE_CATCH(ftape_set_nr_buffers(CONFIG_FT_NR_BUFFERS),
 103                     (void)ftape_set_nr_buffers(0));
 104 #endif
 105         ft_drive_sel = -1;
 106         ft_failure   = 1;         /* inhibit any operation but open */
 107         ftape_udelay_calibrate(); /* must be before fdc_wait_calibrate ! */
 108         fdc_wait_calibrate();
 109 #if defined(CONFIG_PROC_FS) && defined(CONFIG_FT_PROC_FS)
 110         (void)ftape_proc_init();
 111 #endif
 112 #ifdef CONFIG_ZFTAPE
 113         (void)zft_init();
 114 #endif
 115         TRACE_EXIT 0;
 116 }
 117
 118 module_param(ft_fdc_base,       uint, 0);
 119 MODULE_PARM_DESC(ft_fdc_base,  "Base address of FDC controller.");
 120 module_param(ft_fdc_irq,        uint, 0);
 121 MODULE_PARM_DESC(ft_fdc_irq,   "IRQ (interrupt channel) to use.");
 122 module_param(ft_fdc_dma,        uint, 0);
 123 MODULE_PARM_DESC(ft_fdc_dma,   "DMA channel to use.");
 124 module_param(ft_fdc_threshold,  uint, 0);
 125 MODULE_PARM_DESC(ft_fdc_threshold,  "Threshold of the FDC Fifo.");
 126 module_param(ft_fdc_rate_limit, uint, 0);
 127 MODULE_PARM_DESC(ft_fdc_rate_limit, "Maximal data rate for FDC.");
 128 module_param(ft_probe_fc10,     bool, 0);
 129 MODULE_PARM_DESC(ft_probe_fc10,
 130             "If non-zero, probe for a Colorado FC-10/FC-20 controller.");
 131 module_param(ft_mach2,          bool, 0);
 132 MODULE_PARM_DESC(ft_mach2,
 133             "If non-zero, probe for a Mountain MACH-2 controller.");
 134 #if defined(MODULE) && !defined(CONFIG_FT_NO_TRACE_AT_ALL)
 135 module_param(ft_tracing,        int, 0644);
 136 MODULE_PARM_DESC(ft_tracing,
 137             "Amount of debugging output, 0 <= tracing <= 8, default 3.");
 138 #endif
 139
 140 MODULE_AUTHOR(
 141         "(c) 1993-1996 Bas Laarhoven (bas@vimec.nl), "
 142         "(c) 1995-1996 Kai Harrekilde-Petersen (khp@dolphinics.no), "
 143         "(c) 1996, 1997 Claus-Justus Heine (claus@momo.math.rwth-aachen.de)");
 144 MODULE_DESCRIPTION(
 145         "QIC-117 driver for QIC-40/80/3010/3020 floppy tape drives.");
 146 MODULE_LICENSE("GPL");
 147
 148 static void __exit ftape_exit(void)
 149 {
 150         TRACE_FUN(ft_t_flow);
 151
 152 #if defined(CONFIG_PROC_FS) && defined(CONFIG_FT_PROC_FS)
 153         ftape_proc_destroy();
 154 #endif
 155         (void)ftape_set_nr_buffers(0);
 156         printk(KERN_INFO "ftape: unloaded.\n");
 157         TRACE_EXIT;
 158 }
 159
 160 module_init(ftape_init);
 161 module_exit(ftape_exit);