ip2.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:4k
- // ip2.c
- // This is a dummy module to make the firmware available when needed
- // and allows it to be unloaded when not. Rumor is the __initdata
- // macro doesn't always works on all platforms so we use this kludge.
- // If not compiled as a module it just makes fip_firm avaliable then
- // __initdata should work as advertized
- //
- #include <linux/module.h>
- #include <linux/version.h>
- #include <linux/init.h>
- #include <linux/wait.h>
- #ifndef __init
- #define __init
- #endif
- #ifndef __initfunc
- #define __initfunc(a) a
- #endif
- #ifndef __initdata
- #define __initdata
- #endif
- #include "./ip2/ip2types.h"
- #include "./ip2/fip_firm.h" // the meat
- int
- ip2_loadmain(int *, int *, unsigned char *, int ); // ref into ip2main.c
- /* Note: Add compiled in defaults to these arrays, not to the structure
- in ip2/ip2.h any longer. That structure WILL get overridden
- by these values, or command line values, or insmod values!!! =mhw=
- */
- static int io[IP2_MAX_BOARDS]= { 0, 0, 0, 0 };
- static int irq[IP2_MAX_BOARDS] = { -1, -1, -1, -1 };
- #ifdef MODULE
- static int poll_only = 0;
- # if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0)
- MODULE_AUTHOR("Doug McNash");
- MODULE_DESCRIPTION("Computone IntelliPort Plus Driver");
- MODULE_PARM(irq,"1-"__MODULE_STRING(IP2_MAX_BOARDS) "i");
- MODULE_PARM_DESC(irq,"Interrupts for IntelliPort Cards");
- MODULE_PARM(io,"1-"__MODULE_STRING(IP2_MAX_BOARDS) "i");
- MODULE_PARM_DESC(io,"I/O ports for IntelliPort Cards");
- MODULE_PARM(poll_only,"1i");
- MODULE_PARM_DESC(poll_only,"Do not use card interrupts");
- # endif /* LINUX_VERSION */
- //======================================================================
- int
- init_module(void)
- {
- int rc;
- MOD_INC_USE_COUNT; // hold till done
-
- if( poll_only ) {
- /* Hard lock the interrupts to zero */
- irq[0] = irq[1] = irq[2] = irq[3] = 0;
- }
- rc = ip2_loadmain(io,irq,(unsigned char *)fip_firm,sizeof(fip_firm));
- // The call to lock and load main, create dep
- MOD_DEC_USE_COUNT; //done - kerneld now can unload us
- return rc;
- }
- //======================================================================
- int
- ip2_init(void)
- {
- // call to this is in tty_io.c so we need this
- return 0;
- }
- //======================================================================
- void
- cleanup_module(void)
- {
- }
- MODULE_LICENSE("GPL");
- #else // !MODULE
- #ifndef NULL
- # define NULL ((void *) 0)
- #endif
- /******************************************************************************
- * ip2_setup:
- * str: kernel command line string
- *
- * Can't autoprobe the boards so user must specify configuration on
- * kernel command line. Sane people build it modular but the others
- * come here.
- *
- * Alternating pairs of io,irq for up to 4 boards.
- * ip2=io0,irq0,io1,irq1,io2,irq2,io3,irq3
- *
- * io=0 => No board
- * io=1 => PCI
- * io=2 => EISA
- * else => ISA I/O address
- *
- * irq=0 or invalid for ISA will revert to polling mode
- *
- * Any value = -1, do not overwrite compiled in value.
- *
- ******************************************************************************/
- static int __init ip2_setup(char *str)
- {
- int ints[10]; /* 4 boards, 2 parameters + 2 */
- int i, j;
- str = get_options (str, ARRAY_SIZE(ints), ints);
- for( i = 0, j = 1; i < 4; i++ ) {
- if( j > ints[0] ) {
- break;
- }
- if( ints[j] >= 0 ) {
- io[i] = ints[j];
- }
- j++;
- if( j > ints[0] ) {
- break;
- }
- if( ints[j] >= 0 ) {
- irq[i] = ints[j];
- }
- j++;
- }
- return 1;
- }
- int
- ip2_init(void) {
- return ip2_loadmain(io,irq,(unsigned char *)fip_firm,sizeof(fip_firm));
- }
- #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,13))
- __setup("ip2=", ip2_setup);
- __initcall(ip2_init);
- #endif
- #endif /* !MODULE */