added i2c controller functions, added IDE interface functions, fiexd IDE schematics

2023-01-16 19:30:31 +01:00
parent 265342e7f7
commit 96c4dca4d5
34 changed files with 18931 additions and 3700 deletions
--- a/OperatingSystem/software/include/kdrv_ideif.s
+++ b/OperatingSystem/software/include/kdrv_ideif.s
@@ -0,0 +1,93 @@
+;----------------------------------------------------------------
+;BIOS Driver for IDE Access
+;by Dennis Gunia (01/2023)
+;----------------------------------------------------------------
+
+;================================================================
+; IDE commands
+;================================================================
+    IDE_CMD_IDENT   .EQU 0xEC    ;Identify drive.
+    IDE_CMD_READSEC .EQU 0x20    ;Read sectors.
+
+;================================================================
+; IDE Variables
+;================================================================
+    MEM_IDE_BASE    .EQU 0x5000
+    MEM_IDE_DEVICE  .EQU MEM_IDE_BASE       ;1Byte:   Device ID for IDE-Port, Controller and Master/Slave
+    MEM_IDE_STATUS  .EQU MEM_IDE_BASE + 1   ;1Byte:   0x00 if status is okay
+    MEM_IDE_BUFFER  .EQU MEM_IDE_BASE + 2   ;512Byte: buffer for read/write data
+
+;================================================================
+; IDE funtions
+;================================================================
+
+;------------------------------------------------------------------------------
+; ideif_init_drive
+;
+; initializes drive
+;------------------------------------------------------------------------------
+ideif_init_drive:
+    xor a
+    ld (MEM_IDE_DEVICE),A   ;Set device to 0    
+    ld (MEM_IDE_STATUS),A   ;Set status to 0 (OK)
+    di              ;disable interrupt 
+    call ide_reset  ;Reset drives on bus
+    ld hl, [str_dev_waitready]
+    call print_str  ;print waiting message
+    ld DE, 0x1FFF   ;preload timeout counter
+ideif_init_drive_loop1:
+    ld b, IDE_REG_CMDSTS 
+    call ide_regread_8  ;read drive status register
+    OR A
+    JR Z, ideif_init_drive_nodrv    ;no drive found
+    BIT 6,A             ;Wait for device ready
+    JR NZ, ideif_init_drive_detected 
+    DEC DE  ; decrement timeout
+    LD A,D
+    OR E
+    JR Z, ideif_init_drive_nodrv
+
+    JR ideif_init_drive_loop1
+
+ideif_init_drive_nodrv:
+    ld hl, [str_dev_notfound]
+    call print_str
+    RET
+
+ideif_init_drive_detected:
+    ld hl, [str_dev_ready]
+    call print_str
+    LD B, IDE_REG_CMDSTS    ;Get drive identification
+    LD A, IDE_CMD_IDENT
+    call ide_regwrite_8     ;Write command to drive
+    LD HL,MEM_IDE_BUFFER    ;set read/write buffer start address
+    call ide_readsector_256 ;read 256 words from device
+    LD HL,MEM_IDE_BUFFER + 20  ;print device serial
+    LD B, 20
+    CALL print_str_fixed
+    ld hl, [str_dev_ready2] 
+    call print_str
+    LD HL,MEM_IDE_BUFFER + 54  ;print device name
+    LD B, 40
+    CALL print_str_fixed
+    LD A,10                 ;New line
+    CALL print_char
+    LD A,13
+    CALL print_char
+    RET
+
+
+;================================================================
+; IDE strings
+;===============================================================
+
+str_dev_waitready:
+    db 13,10,"Seek HDD ... ",0
+
+str_dev_ready:
+    db "Device Found!",13,10,"Serial: ",0
+str_dev_ready2:
+    db "  Name: ",0
+
+str_dev_notfound:
+    db "no drive detected",13,10,0