GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (c) 2007 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ */
+#include <common.h>
+#include "ax88796.h"
+
+/*
+ * Set 1 bit data
+ */
+static void ax88796_bitset(u32 bit)
+{
+	/* DATA1 */
+	if( bit )
+		EEDI_HIGH;
+	else
+		EEDI_LOW;
+
+	EECLK_LOW;
+	udelay(1000);
+	EECLK_HIGH;
+	udelay(1000);
+	EEDI_LOW;
+}
+
+/*
+ * Get 1 bit data
+ */
+static u8 ax88796_bitget(void)
+{
+	u8 bit;
+
+	EECLK_LOW;
+	udelay(1000);
+	/* DATA */
+	bit = EEDO;
+	EECLK_HIGH;
+	udelay(1000);
+
+	return bit;
+}
+
+/*
+ * Send COMMAND to EEPROM
+ */
+static void ax88796_eep_cmd(u8 cmd)
+{
+	ax88796_bitset(BIT_DUMMY);
+	switch(cmd){
+		case MAC_EEP_READ:
+			ax88796_bitset(1);
+			ax88796_bitset(1);
+			ax88796_bitset(0);
+			break;
+
+		case MAC_EEP_WRITE:
+			ax88796_bitset(1);
+			ax88796_bitset(0);
+			ax88796_bitset(1);
+			break;
+
+		case MAC_EEP_ERACE:
+			ax88796_bitset(1);
+			ax88796_bitset(1);
+			ax88796_bitset(1);
+			break;
+
+		case MAC_EEP_EWEN:
+			ax88796_bitset(1);
+			ax88796_bitset(0);
+			ax88796_bitset(0);
+			break;
+
+		case MAC_EEP_EWDS:
+			ax88796_bitset(1);
+			ax88796_bitset(0);
+			ax88796_bitset(0);
+			break;
+		default:
+			break;
+	}
+}
+
+static void ax88796_eep_setaddr(u16 addr)
+{
+	int i ;
+
+	for( i = 7 ; i >= 0 ; i-- )
+		ax88796_bitset(addr & (1 << i));
+}
+
+/*
+ * Get data from EEPROM
+ */
+static u16 ax88796_eep_getdata(void)
+{
+	ushort data = 0;
+	int i;
+
+	ax88796_bitget();	/* DUMMY */
+	for( i = 0 ; i < 16 ; i++ ){
+		data <<= 1;
+		data |= ax88796_bitget();
+	}
+	return data;
+}
+
+static void ax88796_mac_read(u8 *buff)
+{
+	int i ;
+	u16 data;
+	u16 addr = 0;
+
+	for( i = 0 ; i < 3; i++ )
+	{
+		EECS_HIGH;
+		EEDI_LOW;
+		udelay(1000);
+		/* READ COMMAND */
+		ax88796_eep_cmd(MAC_EEP_READ);
+		/* ADDRESS */
+		ax88796_eep_setaddr(addr++);
+		/* GET DATA */
+		data = ax88796_eep_getdata();
+		*buff++ = (uchar)(data & 0xff);
+		*buff++ = (uchar)((data >> 8) & 0xff);
+		EECLK_LOW;
+		EEDI_LOW;
+		EECS_LOW;
+	}
+}
+
+int get_prom(u8* mac_addr, u8* base_addr)
+{
+	u8 prom[32];
+	int i;
+
+	ax88796_mac_read(prom);
+	for (i = 0; i < 6; i++){
+		mac_addr[i] = prom[i];
+	}
+	return 1;
+}