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