Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Determine the default floppy type on the TT/Falcon by reading the config

Browse Source 
switches. (Thanks to Michael Schwingen for the missing bits of information!).
This commit is contained in:
leo 2000-01-06 12:14:33 +00:00
parent 2b1c23376c
commit a93741b5c7
2 changed files with 44 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
sys/arch/atari/dev/fd.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: fd.c,v 1.29 1999/08/06 08:27:30 leo Exp $ */
/* $NetBSD: fd.c,v 1.30 2000/01/06 12:14:33 leo Exp $ */
/*
* Copyright (c) 1995 Leo Weppelman.
@ -174,8 +174,19 @@ struct fd_types {
{ 2, 18, 2880 , FLP_HD , "1.44MB" }, /* 1.44 Mb */
};
#define FLP_TYPE_360 0 /* XXX: Please keep these in */
#define FLP_TYPE_720 1 /* sync with the numbering in */
#define FLP_TYPE_144 2 /* 'fdtypes' right above! */
/*
* This is set only once at attach time. The value is determined by reading
* the configuration switches and is one of the FLP_TYPE_*'s.
* This is simular to the way Atari handles the _FLP cookie.
*/
static short def_type = 0; /* Reflects config-switches */
#define FLP_DEFTYPE 1 /* 720Kb, reasonable default */
#define FLP_TYPE(dev) ( DISKPART(dev) == 0 ? FLP_DEFTYPE : DISKPART(dev) - 1 )
#define FLP_TYPE(dev) ( DISKPART(dev) == 0 ? def_type : DISKPART(dev) - 1 )
typedef void (*FPV) __P((void *));
@ -230,6 +241,25 @@ extern __inline__ u_char read_dmastat(void)
return(DMA->dma_stat);
}
/*
* Config switch stuff. Used only for the floppy type for now. That's
* why it's here...
* XXX: If needed in more places, it should be moved to it's own include file.
* Note: This location _must_ be read as an u_short. Failure to do so
* will return garbage!
*/
static u_short rd_cfg_switch __P((void));
static u_short rd_cfg_switch(void)
{
return(*((u_short*)AD_CFG_SWITCH));
}
/*
* Switch definitions.
* Note: ON reads as a zero bit!
*/
#define CFG_SWITCH_NOHD 0x4000
/*
* Autoconfig stuff....
*/
@ -341,10 +371,19 @@ struct device *pdp, *dp;
void *auxp;
{
struct fd_softc *sc;
struct fd_types *type = &fdtypes[FLP_DEFTYPE]; /* XXX: switches??? */
struct fd_types *type;
u_short swtch;
sc = (struct fd_softc *)dp;
/*
* Find out if an Ajax chip might be installed. Set the default
* floppy type accordingly.
*/
swtch = rd_cfg_switch();
def_type = (swtch & CFG_SWITCH_NOHD) ? FLP_TYPE_720 : FLP_TYPE_144;
type = &fdtypes[def_type];
printf(": %s %d cyl, %d head, %d sec\n", type->descr,
type->nblocks / (type->nsectors * type->nheads), type->nheads,
type->nsectors);

4
sys/arch/atari/include/iomap.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: iomap.h,v 1.7 1999/12/06 16:06:41 leo Exp $ */
/* $NetBSD: iomap.h,v 1.8 2000/01/06 12:15:04 leo Exp $ */
/*
* Copyright (c) 1995 Leo Weppelman.
@ -89,7 +89,7 @@ vaddr_t pci_mem_addr; /* KVA base of PCI mem-space */
#define AD_RTC (AD_STIO + 0x0960) /* TT realtime clock */
#define AD_SCC (AD_STIO + 0x0C80) /* SCC 8530 */
#define AD_SCU (AD_STIO + 0x0E00) /* System Control Unit */
#define AD_CFG_SWITCH (AD_STIO + 0x1200) /* Config switches */
#define AD_MFP (AD_STIO + 0x7A00) /* 68901 */
#define AD_MFP2 (AD_STIO + 0x7A80) /* 68901-TT */
#define AD_ACIA (AD_STIO + 0x7C00) /* 2 * 6850 */