drivers/char/ip2.c

   1 // ip2.c
   2 // This is a dummy module to make the firmware available when needed
   3 // and allows it to be unloaded when not. Rumor is the __initdata
   4 // macro doesn't always works on all platforms so we use this kludge.
   5 // If not compiled as a module it just makes fip_firm avaliable then
   6 //  __initdata should work as advertized
   7 //
   8
   9 #include <linux/module.h>
  10 #include <linux/version.h>
  11 #include <linux/init.h>
  12 #include <linux/wait.h>
  13
  14 #ifndef __init
  15 #define __init
  16 #endif
  17 #ifndef __initfunc
  18 #define __initfunc(a) a
  19 #endif
  20 #ifndef __initdata
  21 #define __initdata
  22 #endif
  23
  24 #include "./ip2/ip2types.h"
  25 #include "./ip2/fip_firm.h"             // the meat
  26
  27 int
  28 ip2_loadmain(int *, int  *, unsigned char *, int ); // ref into ip2main.c
  29
  30 /* Note: Add compiled in defaults to these arrays, not to the structure
  31         in ip2/ip2.h any longer.  That structure WILL get overridden
  32         by these values, or command line values, or insmod values!!!  =mhw=
  33 */
  34 static int io[IP2_MAX_BOARDS]= { 0, 0, 0, 0 };
  35 static int irq[IP2_MAX_BOARDS] = { -1, -1, -1, -1 };
  36
  37 static int poll_only = 0;
  38
  39 MODULE_AUTHOR("Doug McNash");
  40 MODULE_DESCRIPTION("Computone IntelliPort Plus Driver");
  41 module_param_array(irq, int, NULL, 0);
  42 MODULE_PARM_DESC(irq,"Interrupts for IntelliPort Cards");
  43 module_param_array(io, int, NULL, 0);
  44 MODULE_PARM_DESC(io,"I/O ports for IntelliPort Cards");
  45 module_param(poll_only, bool, 0);
  46 MODULE_PARM_DESC(poll_only,"Do not use card interrupts");
  47
  48
  49 static int __init ip2_init(void)
  50 {
  51         if( poll_only ) {
  52                 /* Hard lock the interrupts to zero */
  53                 irq[0] = irq[1] = irq[2] = irq[3] = 0;
  54         }
  55
  56         return ip2_loadmain(io,irq,(unsigned char *)fip_firm,sizeof(fip_firm));
  57 }
  58 module_init(ip2_init);
  59
  60 MODULE_LICENSE("GPL");
  61
  62 #ifndef MODULE
  63 /******************************************************************************
  64  *      ip2_setup:
  65  *              str: kernel command line string
  66  *
  67  *      Can't autoprobe the boards so user must specify configuration on
  68  *      kernel command line.  Sane people build it modular but the others
  69  *      come here.
  70  *
  71  *      Alternating pairs of io,irq for up to 4 boards.
  72  *              ip2=io0,irq0,io1,irq1,io2,irq2,io3,irq3
  73  *
  74  *              io=0 => No board
  75  *              io=1 => PCI
  76  *              io=2 => EISA
  77  *              else => ISA I/O address
  78  *
  79  *              irq=0 or invalid for ISA will revert to polling mode
  80  *
  81  *              Any value = -1, do not overwrite compiled in value.
  82  *
  83  ******************************************************************************/
  84 static int __init ip2_setup(char *str)
  85 {
  86         int     ints[10];       /* 4 boards, 2 parameters + 2 */
  87         int     i, j;
  88
  89         str = get_options (str, ARRAY_SIZE(ints), ints);
  90
  91         for( i = 0, j = 1; i < 4; i++ ) {
  92                 if( j > ints[0] ) {
  93                         break;
  94                 }
  95                 if( ints[j] >= 0 ) {
  96                         io[i] = ints[j];
  97                 }
  98                 j++;
  99                 if( j > ints[0] ) {
 100                         break;
 101                 }
 102                 if( ints[j] >= 0 ) {
 103                         irq[i] = ints[j];
 104                 }
 105                 j++;
 106         }
 107         return 1;
 108 }
 109 __setup("ip2=", ip2_setup);
 110 #endif /* !MODULE */