From c08a996ff29ca7b33885aefefbc4dd62c5f34c39 Mon Sep 17 00:00:00 2001
From: mightymax <mightymax@users.sf.net>
Date: Fri, 12 Jan 2007 14:12:55 +0000
Subject: [PATCH] addded wifimac_t I/O functions

---
 desmume/src/wifi.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++
 desmume/src/wifi.h | 14 ++++++++
 2 files changed, 97 insertions(+)

diff --git a/desmume/src/wifi.c b/desmume/src/wifi.c
index 72173fcd2..5d5806e2d 100644
--- a/desmume/src/wifi.c
+++ b/desmume/src/wifi.c
@@ -183,3 +183,86 @@ void WIFI_setBB_DATA(wifimac_t *wifi, u8 val)
 	if ((wifi->bbIOCnt.bits.mode != 1) || !(wifi->bbIOCnt.bits.enable)) return ; /* not for write or disabled */
     wifi->BB.data[wifi->bbIOCnt.bits.address] = val ;
 }
+
+/*******************************************************************************
+
+	wifimac IO: a lot of the wifi regs are action registers, that are mirrored
+				without action, so the default IO via MMU.c does not seem to
+				be very suitable
+
+				all registers are 16 bit
+
+ *******************************************************************************/
+
+void WIFI_write16(wifimac_t *wifi,u32 address, u16 val)
+{
+	BOOL action = FALSE ;
+	if ((address & 0xFF800000) != 0x04800000) return ;      /* error: the address does not describe a wiifi register */
+
+	/* the first 0x1000 bytes are mirrored at +0x1000,+0x2000,+0x3000,+06000,+0x7000 */
+	/* only the first mirror causes an special action */
+	/* the gap at +0x4000 is filled with the circular bufferspace */
+	/* the so created 0x8000 byte block is then mirrored till 0x04FFFFFF */
+	/* see: http://www.akkit.org/info/dswifi.htm#Wifihwcap */
+	if (((address & 0x00007000) >= 0x00004000) && ((address & 0x00007000) < 0x00006000))
+	{
+		/* access to the circular buffer */
+        wifi->circularBuffer[(address & 0x1FFF) >> 1] = val ;
+		return ;
+	}
+	if (!(address & 0x00007000)) action = TRUE ;
+	/* mirrors => register address */
+	address &= 0x00000FFF ;
+	switch (address)
+	{
+		case REG_WIFI_IE:
+			wifi->IE.val = val ;
+			break ;
+		case REG_WIFI_IF:
+			wifi->IF.val = val ;
+			break ;
+		case REG_WIFI_RFIOCNT:
+			WIFI_setRF_CNT(wifi,val) ;
+			break ;
+		case REG_WIFI_RFIOBSY:
+			/* CHECKME: read only? */
+			break ;
+		case REG_WIFI_RFIODATA1:
+			WIFI_setRF_DATA(wifi,val,0) ;
+			break ;
+		case REG_WIFI_RFIODATA2:
+			WIFI_setRF_DATA(wifi,val,1) ;
+			break ;
+	}
+}
+
+u16 WIFI_read16(wifimac_t *wifi,u32 address)
+{
+	BOOL action = FALSE ;
+	if ((address & 0xFF800000) != 0x04800000) return 0 ;      /* error: the address does not describe a wiifi register */
+
+	/* the first 0x1000 bytes are mirrored at +0x1000,+0x2000,+0x3000,+06000,+0x7000 */
+	/* only the first mirror causes an special action */
+	/* the gap at +0x4000 is filled with the circular bufferspace */
+	/* the so created 0x8000 byte block is then mirrored till 0x04FFFFFF */
+	/* see: http://www.akkit.org/info/dswifi.htm#Wifihwcap */
+	if (((address & 0x00007000) >= 0x00004000) && ((address & 0x00007000) < 0x00006000))
+	{
+		/* access to the circular buffer */
+        return wifi->circularBuffer[(address & 0x1FFF) >> 1] ;
+	}
+	if (!(address & 0x00007000)) action = TRUE ;
+	/* mirrors => register address */
+	address &= 0x00000FFF ;
+	switch (address)
+	{
+		case REG_WIFI_IE:
+			return wifi->IE.val ;
+		case REG_WIFI_IF:
+			return wifi->IF.val ;
+		case REG_WIFI_RFIODATA1:
+			return WIFI_getRF_DATA(wifi,0) ;
+		case REG_WIFI_RFIODATA2:
+			return WIFI_getRF_DATA(wifi,1) ;
+	}
+}
diff --git a/desmume/src/wifi.h b/desmume/src/wifi.h
index d985439a6..4e834bf2e 100644
--- a/desmume/src/wifi.h
+++ b/desmume/src/wifi.h
@@ -27,6 +27,13 @@ extern "C" {
 
 #include "types.h"
 
+#define     REG_WIFI_IF     	0x010
+#define     REG_WIFI_IE     	0x012
+#define     REG_WIFI_RFIODATA2  0x17C
+#define     REG_WIFI_RFIODATA1  0x17E
+#define     REG_WIFI_RFIOBSY    0x180
+#define     REG_WIFI_RFIOCNT    0x184
+
 /* Referenced as RF_ in dswifi: rffilter_t */
 /* based on the documentation for the RF2958 chip of RF Micro Devices */
 /* using the register names as in docs ( http://www.rfmd.com/pdfs/2958.pdf )*/
@@ -294,6 +301,9 @@ typedef struct
 	rfIOData_t  rfIOData ;
     bbIOCnt_t   bbIOCnt ;
 
+	/* buffers */
+	u16         circularBuffer[0x1000] ;
+
 } wifimac_t ;
 
 
@@ -307,6 +317,10 @@ void WIFI_setBB_CNT(wifimac_t *wifi,u16 val) ;
 u8   WIFI_getBB_DATA(wifimac_t *wifi) ;
 void WIFI_setBB_DATA(wifimac_t *wifi, u8 val) ;
 
+/* wifimac io */
+void WIFI_write16(wifimac_t *wifi,u32 address, u16 val) ;
+u16  WIFI_read16(wifimac_t *wifi,u32 address) ;
+
 #ifdef __cplusplus
 }
 #endif