From 9e6c38917c9b612bc46a6a94ee406151193641a6 Mon Sep 17 00:00:00 2001
From: John Crispin <john@openwrt.org>
Date: Sun, 6 Jul 2008 00:59:48 +0000
Subject: make atheros wifi cards used on arcaydian 4519 ifxmips based boards
 work

SVN-Revision: 11676
---
 package/madwifi/patches/354-ifxmips_eeprom.patch | 100 +++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 package/madwifi/patches/354-ifxmips_eeprom.patch

(limited to 'package/madwifi/patches/354-ifxmips_eeprom.patch')

diff --git a/package/madwifi/patches/354-ifxmips_eeprom.patch b/package/madwifi/patches/354-ifxmips_eeprom.patch
new file mode 100644
index 0000000..f4c8f73
--- /dev/null
+++ b/package/madwifi/patches/354-ifxmips_eeprom.patch
@@ -0,0 +1,100 @@
+Index: madwifi-trunk-r3314/ath_hal/ah_os.c
+===================================================================
+--- madwifi-trunk-r3314.orig/ath_hal/ah_os.c	2008-07-06 02:42:52.000000000 +0200
++++ madwifi-trunk-r3314/ath_hal/ah_os.c	2008-07-06 02:51:53.000000000 +0200
+@@ -343,6 +343,46 @@
+  * NB: see the comments in ah_osdep.h about byte-swapping register
+  *     reads and writes to understand what's going on below.
+  */
++
++#ifdef CONFIG_IFXMIPS
++extern int ifxmips_has_brn_block(void);
++static int ifxmips_emulate = 0;
++#define EEPROM_EMULATION 1
++#endif
++
++#ifdef EEPROM_EMULATION
++static int ath_hal_eeprom(struct ath_hal *ah, unsigned long addr, int val, int write)
++{
++	static int addrsel = 0;
++	static int rc = 0;
++
++	if (write) {
++		if(addr == 0x6000) {
++			addrsel = val * 2;
++			rc = 0;
++		}
++	} else {
++		switch(addr)
++		{
++		case 0x600c:
++			if(rc++ < 2)
++				val = 0x00000000;
++			else
++				val = 0x00000002;
++			break;
++		case 0x6004:
++			val = cpu_to_le16(__raw_readw((u16 *) KSEG1ADDR(0xb07f0400 + addrsel)));
++			/* this forces the regdomain to 0x00 (worldwide), as the original setting
++			 * causes issues with the HAL */
++			if (addrsel == 0x17e)
++				val = 0;
++			break;
++		}
++	}
++	return val;
++}
++#endif
++
+ void __ahdecl
+ ath_hal_reg_write(struct ath_hal *ah, u_int reg, u_int32_t val)
+ {
+@@ -351,20 +391,33 @@
+ 		ath_hal_printf(ah, "%s: WRITE 0x%x <= 0x%x\n", 
+ 				(ath_hal_func ?: "unknown"), reg, val);
+ #endif
+-	_OS_REG_WRITE(ah, reg, val);
++#ifdef EEPROM_EMULATION
++	if((reg >= 0x6000) && (reg <= 0x6010) && ifxmips_emulate)
++	{
++		val = ath_hal_eeprom(ah, reg, val, 1);
++	} else
++#endif
++		_OS_REG_WRITE(ah, reg, val);
+ }
+ EXPORT_SYMBOL(ath_hal_reg_write);
+ 
++
+ /* This should only be called while holding the lock, sc->sc_hal_lock. */
+ u_int32_t __ahdecl
+ ath_hal_reg_read(struct ath_hal *ah, u_int reg)
+ {
+- 	u_int32_t val;
++	u_int32_t val;
++#ifdef EEPROM_EMULATION
++	if((reg >= 0x6000) && (reg <= 0x6010) && ifxmips_emulate)
++	{
++		val = ath_hal_eeprom(ah, reg, 0, 0);
++	} else
++#endif
++		val = _OS_REG_READ(ah, reg);
+ 
+-	val = _OS_REG_READ(ah, reg);
+ #ifdef AH_DEBUG
+ 	if (ath_hal_debug > 1)
+-		ath_hal_printf(ah, "%s: READ 0x%x => 0x%x\n", 
++		ath_hal_printf(ah, "%s: READ 0x%x => 0x%x\n",
+ 				(ath_hal_func ?: "unknown"), reg, val);
+ #endif
+ 	return val;
+@@ -581,7 +634,9 @@
+ {
+ 	const char *sep;
+ 	int i;
+-
++#ifdef CONFIG_IFXMIPS
++	ifxmips_emulate = ifxmips_has_brn_block();
++#endif
+ 	printk(KERN_INFO "%s: %s (", dev_info, ath_hal_version);
+ 	sep = "";
+ 	for (i = 0; ath_hal_buildopts[i] != NULL; i++) {
-- 
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