[ARM] Collect 8250-based debug implementations together

Several ARM machine implementations used an 8250 compatible port for
debugging purposes, and indepdently implemented the low level debug
macros every time.  Provide a common implementation and convert these
implementations to use this version.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

8 files changed, 47 insertions, 103 deletions

diff --git a/include/asm-arm/arch-cl7500/debug-macro.S b/include/asm-arm/arch-cl7500/debug-macro.S
index a5d489d..9a2b67d 100644
--- a/include/asm-arm/arch-cl7500/debug-macro.S
+++ b/include/asm-arm/arch-cl7500/debug-macro.S
@@ -17,15 +17,5 @@
 		orr	\rx, \rx, #0x00000be0
 		.endm
 
-		.macro	senduart,rd,rx
-		strb	\rd, [\rx]
-		.endm
-
-		.macro	busyuart,rd,rx
-		.endm
-
-		.macro	waituart,rd,rx
-1001:		ldrb	\rd, [\rx, #0x14]
-		tst	\rd, #0x20
-		beq	1001b
-		.endm
+#define UART_SHIFT	2
+#include <asm/hardware/debug-8250.S>
diff --git a/include/asm-arm/arch-ebsa110/debug-macro.S b/include/asm-arm/arch-ebsa110/debug-macro.S
index dcd03a4..f61cada 100644
--- a/include/asm-arm/arch-ebsa110/debug-macro.S
+++ b/include/asm-arm/arch-ebsa110/debug-macro.S
@@ -16,19 +16,6 @@
 		orr	\rx, \rx, #0x00000be0
 		.endm
 
-		.macro	senduart,rd,rx
-		strb	\rd, [\rx]
-		.endm
-
-		.macro	busyuart,rd,rx
-1002:		ldrb	\rd, [\rx, #0x14]
-		and	\rd, \rd, #0x60
-		teq	\rd, #0x60
-		bne	1002b
-		.endm
-
-		.macro	waituart,rd,rx
-1001:		ldrb	\rd, [\rx, #0x18]
-		tst	\rd, #0x10
-		beq	1001b
-		.endm
+#define UART_SHIFT	2
+#define FLOW_CONTROL
+#include <asm/hardware/debug-8250.h>
diff --git a/include/asm-arm/arch-ebsa285/debug-macro.S b/include/asm-arm/arch-ebsa285/debug-macro.S
index 97d15fc..b48cec4 100644
--- a/include/asm-arm/arch-ebsa285/debug-macro.S
+++ b/include/asm-arm/arch-ebsa285/debug-macro.S
@@ -23,22 +23,10 @@
 		orr	\rx, \rx, #0x000003f8
 		.endm
 
-		.macro	senduart,rd,rx
-		strb	\rd, [\rx]
-		.endm
+#define UART_SHIFT	0
+#define FLOW_CONTROL
+#include <asm/hardware/debug-8250.S>
 
-		.macro	busyuart,rd,rx
-1002:		ldrb	\rd, [\rx, #0x5]
-		and	\rd, \rd, #0x60
-		teq	\rd, #0x60
-		bne	1002b
-		.endm
-
-		.macro	waituart,rd,rx
-1001:		ldrb	\rd, [\rx, #0x6]
-		tst	\rd, #0x10
-		beq	1001b
-		.endm
 #else
 	/* For EBSA285 debugging */
 		.equ	dc21285_high, ARMCSR_BASE & 0xff000000
diff --git a/include/asm-arm/arch-iop3xx/debug-macro.S b/include/asm-arm/arch-iop3xx/debug-macro.S
index cc15f80..ce007e5 100644
--- a/include/asm-arm/arch-iop3xx/debug-macro.S
+++ b/include/asm-arm/arch-iop3xx/debug-macro.S
@@ -28,21 +28,8 @@
 #endif
 		.endm
 
-		.macro	senduart,rd,rx
-		strb	\rd, [\rx]
-		.endm
-
-		.macro	busyuart,rd,rx
-1002:		ldrb	\rd, [\rx, #0x5]
-		and	\rd, \rd, #0x60
-		teq	\rd, #0x60
-		bne	1002b
-		.endm
-
-		.macro	waituart,rd,rx
 #if !defined(CONFIG_ARCH_IQ80321) || !defined(CONFIG_ARCH_IQ31244) || !defined(CONFIG_ARCH_IQ80331)
-1001:		ldrb	\rd, [\rx, #0x6]
-		tst	\rd, #0x10
-		beq	1001b
+#define FLOW_CONTROL
 #endif
-		.endm
+#define UART_SHIFT	0
+#include <asm/hardware/debug-8250.S>
diff --git a/include/asm-arm/arch-ixp4xx/debug-macro.S b/include/asm-arm/arch-ixp4xx/debug-macro.S
index 2e23651..37bc8ef 100644
--- a/include/asm-arm/arch-ixp4xx/debug-macro.S
+++ b/include/asm-arm/arch-ixp4xx/debug-macro.S
@@ -20,16 +20,5 @@
 						@ byte writes used - Big Endian.
                 .endm
 
-               .macro  senduart,rd,rx
-                strb    \rd, [\rx]
-                .endm
-
-                .macro  waituart,rd,rx
-1002:           ldrb    \rd, [\rx, #0x14]
-                and     \rd, \rd, #0x60		@ check THRE and TEMT bits
-                teq     \rd, #0x60
-                bne     1002b
-                .endm
-
-                .macro  busyuart,rd,rx
-                .endm
+#define UART_SHIFT	2
+#include <asm/hardware/debug-8250.S>
diff --git a/include/asm-arm/arch-pxa/debug-macro.S b/include/asm-arm/arch-pxa/debug-macro.S
index b6ec688..9012cbc 100644
--- a/include/asm-arm/arch-pxa/debug-macro.S
+++ b/include/asm-arm/arch-pxa/debug-macro.S
@@ -21,18 +21,5 @@
 		orr	\rx, \rx, #0x00100000
 		.endm
 
-		.macro	senduart,rd,rx
-		str	\rd, [\rx, #0]
-		.endm
-
-		.macro	busyuart,rd,rx
-1002:		ldr	\rd, [\rx, #0x14]
-		tst	\rd, #(1 << 6)
-		beq	1002b
-		.endm
-
-		.macro	waituart,rd,rx
-1001:		ldr	\rd, [\rx, #0x14]
-		tst	\rd, #(1 << 5)
-		beq	1001b
-		.endm
+#define UART_SHIFT	2
+#include <asm/hardware/debug-8250.S>
diff --git a/include/asm-arm/arch-rpc/debug-macro.S b/include/asm-arm/arch-rpc/debug-macro.S
index 456d3d7..c634c8d 100644
--- a/include/asm-arm/arch-rpc/debug-macro.S
+++ b/include/asm-arm/arch-rpc/debug-macro.S
@@ -20,19 +20,6 @@
 		orr	\rx, \rx, #0x00000fe0
 		.endm
 
-		.macro	senduart,rd,rx
-		strb	\rd, [\rx]
-		.endm
-
-		.macro	busyuart,rd,rx
-1001:		ldrb	\rd, [\rx, #0x14]
-		and	\rd, \rd, #0x60
-		teq	\rd, #0x60
-		bne	1001b
-		.endm
-
-		.macro	waituart,rd,rx
-1001:		ldrb	\rd, [\rx, #0x18]
-		tst	\rd, #0x10
-		beq	1001b
-		.endm
+#define UART_SHIFT	2
+#define FLOW_CONTROL
+#include <asm/hardware/debug-8250.S>
diff --git a/include/asm-arm/hardware/debug-8250.S b/include/asm-arm/hardware/debug-8250.S
new file mode 100644
index 0000000..4594fea
--- /dev/null
+++ b/include/asm-arm/hardware/debug-8250.S
@@ -0,0 +1,29 @@
+/*
+ * linux/include/asm-arm/hardware/debug-8250.h
+ *
+ *  Copyright (C) 1994-1999 Russell King
+ *
+ * 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.
+ */
+#include <linux/serial_reg.h>
+
+		.macro	senduart,rd,rx
+		strb	\rd, [\rx, #UART_TX << UART_SHIFT]
+		.endm
+
+		.macro	busyuart,rd,rx
+1002:		ldrb	\rd, [\rx, #UART_LSR << UART_SHIFT]
+		and	\rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
+		teq	\rd, #UART_LSR_TEMT | UART_LSR_THRE
+		bne	1002b
+		.endm
+
+		.macro	waituart,rd,rx
+#ifdef FLOW_CONTROL
+1001:		ldrb	\rd, [\rx, #UART_MSR << UART_SHIFT]
+		tst	\rd, #UART_MSR_CTS
+		beq	1001b
+#endif
+		.endm