Replace psxgpu debug font, add CdGetSector2()

4 files changed, 40 insertions, 67 deletions

diff --git a/libpsn00b/psxcd/cdgetsector.s b/libpsn00b/psxcd/cdgetsector.s
deleted file mode 100644
index 6a29069..0000000
--- a/libpsn00b/psxcd/cdgetsector.s
+++ /dev/null
@@ -1,56 +0,0 @@
-.set noreorder
-
-.include "hwregs_a.inc"
-
-.section .text
-
-.global CdGetSector
-.type CdGetSector, @function
-CdGetSector:
-	
-	lui		$a2, IOBASE
-	
-#.Lwait_fifo:					# Probably redundant as the BIOS CD-ROM
-#	lbu		$v0, CD_REG0($a2)	# routines do not not wait for this
-#	nop
-#	andi	$v0, 0x40
-#	beqz	$v0, .Lwait_fifo
-#	nop
-
-	lui		$v0, 0x1
-#	srl		$a1, 2				# (the official implementation expects $a1/size
-								# to be in 32-bit words rather than bytes)
-	or		$v0, $a1
-	sw		$a0, DMA3_MADR($a2)	# Set DMA base address and transfer length
-	sw		$v0, DMA3_BCR($a2)
-
-	lui		$v0, 0x1100			# Start DMA transfer
-	sw		$v0, DMA3_CHCR($a2)
-	nop
-	nop
-	
-.Ldma_wait:						# Ensure DMA transfer has completed
-	lw		$v0, DMA3_CHCR($a2)
-	nop
-	srl		$v0, 24
-	andi	$v0, 0x1
-
-	bnez	$v0, .Ldma_wait
-	nop
-	
-# Not stable
-#	sb		$0 , CD_REG0($a2)
-#.Lflush_fifo:					# Read out any remaining bytes in the buffer
-#	lbu		$v1, CD_REG0($a2)
-#	li		$v0, 0x40
-#	and		$v1, $v0
-#	beqz	$v1, .Lend_flush
-#	nop
-#	lbu		$v0, CD_REG2($a2)
-#	b		.Lflush_fifo
-#	nop
-#.Lend_flush:
-	
-	jr		$ra
-	li		$v0, 1
-	
diff --git a/libpsn00b/psxcd/getsector.c b/libpsn00b/psxcd/getsector.c
new file mode 100644
index 0000000..bc1c8ae
--- /dev/null
+++ b/libpsn00b/psxcd/getsector.c
@@ -0,0 +1,35 @@
+/*
+ * PSn00bSDK CD drive library (sector DMA API)
+ * (C) 2022 spicyjpeg - MPL licensed
+ */
+
+#include <stdint.h>
+#include <psxcd.h>
+#include <hwregs_c.h>
+
+/* DMA transfer functions */
+
+int CdGetSector(void *madr, int size) {
+	//while (!(CD_STAT & (1 << 6)))
+		//__asm__ volatile("");
+
+	DMA_MADR(3) = (uint32_t) madr;
+	DMA_BCR(3)  = size | (1 << 16);
+	DMA_CHCR(3) = 0x11000000;
+
+	while (DMA_CHCR(3) & (1 << 24))
+		__asm__ volatile("");
+
+	return 1;
+}
+
+int CdGetSector2(void *madr, int size) {
+	//while (!(CD_STAT & (1 << 6)))
+		//__asm__ volatile("");
+
+	DMA_MADR(3) = (uint32_t) madr;
+	DMA_BCR(3)  = size | (1 << 16);
+	DMA_CHCR(3) = 0x11400100; // Transfer 1 word every 16 CPU cycles
+
+	return 1;
+}
diff --git a/libpsn00b/psxcd/isofs.c b/libpsn00b/psxcd/isofs.c
index 582b8d9..d620377 100644
--- a/libpsn00b/psxcd/isofs.c
+++ b/libpsn00b/psxcd/isofs.c
@@ -434,8 +434,8 @@ static int find_dir_entry(const char *name, ISO_DIR_ENTRY *dirent)
 
 static char* get_pathname(char *path, const char *filename)
 {
-	char *c = 0;
-	for (char *i = filename; *i; i++) {
+	const char *c = 0;
+	for (const char *i = filename; *i; i++) {
 		if (IS_PATH_SEP(*i))
 			c = i;
 	}
@@ -453,8 +453,8 @@ static char* get_pathname(char *path, const char *filename)
 
 static char* get_filename(char *name, const char *filename)
 {
-	char *c = 0;
-	for (char *i = filename; *i; i++) {
+	const char *c = 0;
+	for (const char *i = filename; *i; i++) {
 		if (IS_PATH_SEP(*i))
 			c = i;
 	}
diff --git a/libpsn00b/psxcd/psxcd_asm.s b/libpsn00b/psxcd/psxcd_asm.s
index 906ab32..16e17d8 100644
--- a/libpsn00b/psxcd/psxcd_asm.s
+++ b/libpsn00b/psxcd/psxcd_asm.s
@@ -490,13 +490,7 @@ CdSyncCallback:
 	
 
 .section .data
-	
-.global psxcd_credits
-.type psxcd_credits, @object
-psxgpu_credits:
-	.ascii "psxcd library programs by Lameguy64\n"
-	.asciiz "2020 PSn00bSDK Project / Meido-Tek Productions\n"
-	
+
 .comm	_cd_last_cmd, 1, 1
 .comm	_cd_last_mode, 1, 1
 .comm	_cd_ack_wait, 1, 1