From 8ddb592c84b39a306dd5c9a542a24f9bad61481b Mon Sep 17 00:00:00 2001
From: rob <rob@a1c6a512-1295-4272-9138-f99709370657>
Date: Fri, 20 Mar 2009 23:14:05 +0000
Subject: [PATCH] Implement udelay() for D2 and remove the old hacks from USB &
 FM drivers.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20417 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/drivers/tuner/lv24020lp.c           | 7 +++----
 firmware/target/arm/tcc780x/system-target.h  | 7 +++++++
 firmware/target/arm/tcc780x/system-tcc780x.c | 3 +++
 firmware/target/arm/usb-tcc.c                | 8 --------
 4 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/firmware/drivers/tuner/lv24020lp.c b/firmware/drivers/tuner/lv24020lp.c
index 9d6425b96..769be8ac7 100644
--- a/firmware/drivers/tuner/lv24020lp.c
+++ b/firmware/drivers/tuner/lv24020lp.c
@@ -75,12 +75,11 @@ static int fd_log = -1;
 #define FM_CLOCK_PIN    5
 #define FM_DATA_PIN     6
 #define FM_NRW_PIN      7
-//#define udelay(x)       /* Remove hack when D2 has udelay */
-
+/* Remove hack when i7 has udelay */
 static void udelay(int usecs)
 {
     while (usecs--)
-	asm("nop;nop;");
+    asm("nop;nop;");
 }
 
 #elif defined(COWON_D2)
@@ -90,7 +89,7 @@ static void udelay(int usecs)
 #define FM_NRW_PIN      31
 #define FM_CLOCK_PIN    29
 #define FM_DATA_PIN     30
-#define udelay(x)       /* Remove hack when D2 has udelay */
+
 #else
 #error GPIOs undefined for this target
 #endif
diff --git a/firmware/target/arm/tcc780x/system-target.h b/firmware/target/arm/tcc780x/system-target.h
index aa3cc7aa4..0802bb92e 100644
--- a/firmware/target/arm/tcc780x/system-target.h
+++ b/firmware/target/arm/tcc780x/system-target.h
@@ -34,4 +34,11 @@
 #define inw(a) (*(volatile unsigned short *) (a))
 #define outw(a,b) (*(volatile unsigned short *) (b) = (a))
 
+/* TC32 is configured to 1MHz in clock_init() */
+static inline void udelay(unsigned usecs)
+{
+    unsigned stop = TC32MCNT + usecs;
+    while (TIME_BEFORE(TC32MCNT, stop));
+}
+
 #endif /* SYSTEM_TARGET_H */
diff --git a/firmware/target/arm/tcc780x/system-tcc780x.c b/firmware/target/arm/tcc780x/system-tcc780x.c
index bf3c64cd7..77ae3a4cd 100644
--- a/firmware/target/arm/tcc780x/system-tcc780x.c
+++ b/firmware/target/arm/tcc780x/system-tcc780x.c
@@ -231,6 +231,9 @@ static void clock_init(void)
     
     /* configure PCK_TCT to 2Mhz (clock source 4 (Xin) divided by 6) */
     PCLK_TCT = PCK_EN | (CKSEL_XIN<<24) | 5;
+    
+    /* set TC32 timer to XIN divided by 12 (1MHz) */
+    TC32EN = (1<<24) | 11;
 }
 #endif
 
diff --git a/firmware/target/arm/usb-tcc.c b/firmware/target/arm/usb-tcc.c
index 6f15e68af..611e4be19 100644
--- a/firmware/target/arm/usb-tcc.c
+++ b/firmware/target/arm/usb-tcc.c
@@ -133,14 +133,6 @@ void usb_drv_release_endpoint(int ep)
     restore_irq(flags);
 }
 
-static void udelay(unsigned long msecs)
-{
-    /* TODO: implement me other way */
-    msecs*=126;
-    while (msecs--)
-        asm("nop;");
-}
-
 static inline void pullup_on(void)
 {
     TCC7xx_USB_PHY_CFG = 0x000c;
-- 
2.11.4.GIT