* Patch by Daniel Engström, 13 Nov 2002:
Add support for i386 architecture and AMD SC520 board
* Patch by Pierre Aubert, 12 Nov 2002:
Add support for DOS filesystem and booting from DOS floppy disk
diff --git a/common/cmd_fdc.c b/common/cmd_fdc.c
index 8e6b735..e45b336 100644
--- a/common/cmd_fdc.c
+++ b/common/cmd_fdc.c
@@ -51,7 +51,7 @@
#include <rtc.h>
#endif
-#if (CONFIG_COMMANDS & CFG_CMD_FDC)
+#if ((CONFIG_COMMANDS & CFG_CMD_FDC) || (CONFIG_COMMANDS & CFG_CMD_FDOS))
typedef struct {
@@ -192,7 +192,10 @@
/* reads a Register of the FDC */
unsigned char read_fdc_reg(unsigned int addr)
{
- volatile unsigned char *val = (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS + (addr * CFG_ISA_IO_STRIDE) + CFG_ISA_IO_OFFSET);
+ volatile unsigned char *val =
+ (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS +
+ (addr * CFG_ISA_IO_STRIDE) +
+ CFG_ISA_IO_OFFSET);
return val [0];
}
@@ -200,7 +203,10 @@
/* writes a Register of the FDC */
void write_fdc_reg(unsigned int addr, unsigned char val)
{
- volatile unsigned char *tmp = (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS + (addr * CFG_ISA_IO_STRIDE) + CFG_ISA_IO_OFFSET);
+ volatile unsigned char *tmp =
+ (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS +
+ (addr * CFG_ISA_IO_STRIDE) +
+ CFG_ISA_IO_OFFSET);
tmp[0]=val;
}
@@ -279,7 +285,8 @@
head = sect / pFG->sect; /* head nr */
sect = sect % pFG->sect; /* remaining blocks */
sect++; /* sectors are 1 based */
- PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr);
+ PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",
+ pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr);
if(head|=0) { /* max heads = 2 */
pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */
@@ -588,7 +595,7 @@
* setup the fdc according the datasheet
* assuming in PS2 Mode
*/
-int fdc_setup(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
+int fdc_setup(int drive, FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
{
int i;
@@ -601,7 +608,7 @@
for(i=0; i<255; i++) /* then we wait some time */
udelay(500);
/* then, we clear the reset in the DOR */
- pCMD->drive=CFG_FDC_DRIVE_NUMBER;
+ pCMD->drive=drive;
select_fdc_drive(pCMD);
/* initialize the CCR */
write_fdc_reg(FDC_CCR,pFG->rate);
@@ -621,9 +628,8 @@
PRINTF("Sense Interrupt for drive %d failed\n",i);
}
}
- /* assuming drive 0 for rest of configuration
- * issue the configure command */
- pCMD->drive=CFG_FDC_DRIVE_NUMBER;
+ /* issue the configure command */
+ pCMD->drive=drive;
select_fdc_drive(pCMD);
pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE;
if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
@@ -644,7 +650,74 @@
/* write_fdc_reg(FDC_DOR,0x04); */
return TRUE;
}
+#endif /* ((CONFIG_COMMANDS & CFG_CMD_FDC)||(CONFIG_COMMANDS & CFG_CMD_FDOS))*/
+#if (CONFIG_COMMANDS & CFG_CMD_FDOS)
+
+/* Low level functions for the Floppy-DOS layer */
+
+/**************************************************************************
+* int fdc_fdos_init
+* initialize the FDC layer
+*
+*/
+int fdc_fdos_init (int drive)
+{
+ FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
+ FDC_COMMAND_STRUCT *pCMD = &cmd;
+
+ /* setup FDC and scan for drives */
+ if(fdc_setup(drive,pCMD,pFG)==FALSE) {
+ printf("\n** Error in setup FDC **\n");
+ return FALSE;
+ }
+ if(fdc_check_drive(pCMD,pFG)==FALSE) {
+ printf("\n** Error in check_drives **\n");
+ return FALSE;
+ }
+ if((pCMD->flags&(1<<drive))==0) {
+ /* drive not available */
+ printf("\n** Drive %d not available **\n",drive);
+ return FALSE;
+ }
+ if((pCMD->flags&(0x10<<drive))==0) {
+ /* no disk inserted */
+ printf("\n** No disk inserted in drive %d **\n",drive);
+ return FALSE;
+ }
+ /* ok, we have a valid source */
+ pCMD->drive=drive;
+
+ /* read first block */
+ pCMD->blnr=0;
+ return TRUE;
+}
+/**************************************************************************
+* int fdc_fdos_seek
+* parameter is a block number
+*/
+int fdc_fdos_seek (int where)
+{
+ FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
+ FDC_COMMAND_STRUCT *pCMD = &cmd;
+
+ pCMD -> blnr = where ;
+ return (fdc_seek (pCMD, pFG));
+}
+/**************************************************************************
+* int fdc_fdos_read
+* the length is in block number
+*/
+int fdc_fdos_read (void *buffer, int len)
+{
+ FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
+ FDC_COMMAND_STRUCT *pCMD = &cmd;
+
+ return (fdc_read_data (buffer, len, pCMD, pFG));
+}
+#endif /* (CONFIG_COMMANDS & CFG_CMD_FDOS) */
+
+#if (CONFIG_COMMANDS & CFG_CMD_FDC)
/****************************************************************************
* main routine do_fdcboot
*/
@@ -677,7 +750,7 @@
return 1;
}
/* setup FDC and scan for drives */
- if(fdc_setup(pCMD,pFG)==FALSE) {
+ if(fdc_setup(boot_drive,pCMD,pFG)==FALSE) {
printf("\n** Error in setup FDC **\n");
return 1;
}