[ARM] 3326/1: H1940 - Control latches

Patch from Ben Dooks

Define the bits for the two board control latches
that control various items on the H1940 iPAQ.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 91 insertions, 2 deletions

diff --git a/arch/arm/mach-s3c2410/mach-h1940.c b/arch/arm/mach-s3c2410/mach-h1940.c
index 1c316f14ed94..646a3a5d33a5 100644
--- a/arch/arm/mach-s3c2410/mach-h1940.c
+++ b/arch/arm/mach-s3c2410/mach-h1940.c
@@ -46,10 +46,11 @@
 #include <asm/irq.h>
 #include <asm/mach-types.h>
 
-//#include <asm/debug-ll.h>
+
 #include <asm/arch/regs-serial.h>
 #include <asm/arch/regs-lcd.h>
 
+#include <asm/arch/h1940-latch.h>
 #include <asm/arch/fb.h>
 
 #include <linux/serial_core.h>
@@ -59,7 +60,12 @@
 #include "cpu.h"
 
 static struct map_desc h1940_iodesc[] __initdata = {
-        /* nothing here yet */
+        [0] = {
+                .virtual        = (unsigned long)H1940_LATCH,
+                .pfn            = __phys_to_pfn(H1940_PA_LATCH),
+                .length         = SZ_16K,
+                .type           = MT_DEVICE
+        },
 };
 
 #define UCON S3C2410_UCON_DEFAULT | S3C2410_UCON_UCLK
@@ -92,6 +98,25 @@ static struct s3c2410_uartcfg h1940_uartcfgs[] = {
         }
 };
 
+/* Board control latch control */
+
+static unsigned int latch_state = H1940_LATCH_DEFAULT;
+
+void h1940_latch_control(unsigned int clear, unsigned int set)
+{
+        unsigned long flags;
+
+        local_irq_save(flags);
+
+        latch_state &= ~clear;
+        latch_state |= set;
+
+        __raw_writel(latch_state, H1940_LATCH);
+
+        local_irq_restore(flags);
+}
+
+EXPORT_SYMBOL_GPL(h1940_latch_control);
 
 
 /**
diff --git a/include/asm-arm/arch-s3c2410/h1940-latch.h b/include/asm-arm/arch-s3c2410/h1940-latch.h
new file mode 100644
index 000000000000..c5802411f43d
--- /dev/null
+++ b/include/asm-arm/arch-s3c2410/h1940-latch.h
@@ -0,0 +1,64 @@
+/* linux/include/asm-arm/arch-s3c2410/h1940-latch.h
+ *
+ * (c) 2005 Simtec Electronics
+ *      http://armlinux.simtec.co.uk/
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ *  iPAQ H1940 series - latch definitions
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#ifndef __ASM_ARCH_H1940_LATCH_H
+#define __ASM_ARCH_H1940_LATCH_H
+
+
+#ifndef __ASSEMBLY__
+#define H1940_LATCH             ((void __iomem *)0xF8000000)
+#else
+#define H1940_LATCH             0xF8000000
+#endif
+
+#define H1940_PA_LATCH          (S3C2410_CS2)
+
+/* SD layer latch */
+
+#define H1940_LATCH_SDQ1                (1<<16)
+#define H1940_LATCH_LCD_P1              (1<<17)
+#define H1940_LATCH_LCD_P2              (1<<18)
+#define H1940_LATCH_LCD_P3              (1<<19)
+#define H1940_LATCH_MAX1698_nSHUTDOWN   (1<<20)         /* LCD backlight */
+#define H1940_LATCH_LED_RED             (1<<21)
+#define H1940_LATCH_SDQ7                (1<<22)
+#define H1940_LATCH_USB_DP              (1<<23)
+
+/* CPU layer latch */
+
+#define H1940_LATCH_UDA_POWER           (1<<24)
+#define H1940_LATCH_AUDIO_POWER         (1<<25)
+#define H1940_LATCH_SM803_ENABLE        (1<<26)
+#define H1940_LATCH_LCD_P4              (1<<27)
+#define H1940_LATCH_CPUQ5               (1<<28)         /* untraced */
+#define H1940_LATCH_BLUETOOTH_POWER     (1<<29)         /* active high */
+#define H1940_LATCH_LED_GREEN           (1<<30)
+#define H1940_LATCH_LED_FLASH           (1<<31)
+
+/* default settings */
+
+#define H1940_LATCH_DEFAULT             \
+        H1940_LATCH_LCD_P4              | \
+        H1940_LATCH_SM803_ENABLE        | \
+        H1940_LATCH_SDQ1                | \
+        H1940_LATCH_LCD_P1              | \
+        H1940_LATCH_LCD_P2              | \
+        H1940_LATCH_LCD_P3              | \
+        H1940_LATCH_MAX1698_nSHUTDOWN   | \
+        H1940_LATCH_CPUQ5
+
+/* control functions */
+
+extern void h1940_latch_control(unsigned int clear, unsigned int set);
+
+#endif /* __ASM_ARCH_H1940_LATCH_H */