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From: rmk+kernel@arm.linux.org.uk (Russell King)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH RFC v2 07/14] ARM: debug: add support for word accesses to debug/8250.S
Date: Tue, 16 Jul 2013 17:40:12 +0100	[thread overview]
Message-ID: <E1Uz8IO-00047s-LQ@rmk-PC.arm.linux.org.uk> (raw)
In-Reply-To: <20130716163243.GY21614@n2100.arm.linux.org.uk>

Add 32-bit word access support to debug/8250.S and convert Picoxcell
and SoCFPGA to this.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/Kconfig.debug             |   14 ++++++++++++--
 arch/arm/include/debug/8250.S      |   24 +++++++++++++++++++++---
 arch/arm/include/debug/8250_32.S   |   27 ---------------------------
 arch/arm/include/debug/picoxcell.S |   19 -------------------
 arch/arm/include/debug/socfpga.S   |   21 ---------------------
 5 files changed, 33 insertions(+), 72 deletions(-)
 delete mode 100644 arch/arm/include/debug/8250_32.S
 delete mode 100644 arch/arm/include/debug/picoxcell.S
 delete mode 100644 arch/arm/include/debug/socfpga.S

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 0ba460d..0e8202e 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -451,6 +451,7 @@ choice
 	config DEBUG_PICOXCELL_UART
 		depends on ARCH_PICOXCELL
 		bool "Use PicoXcell UART for low-level debug"
+		select DEBUG_UART_8250
 		help
 		  Say Y here if you want kernel low-level debugging support
 		  on PicoXcell based platforms.
@@ -593,6 +594,7 @@ choice
 	config DEBUG_SOCFPGA_UART
 		depends on ARCH_SOCFPGA
 		bool "Use SOCFPGA UART for low-level debug"
+		select DEBUG_UART_8250
 		help
 		  Say Y here if you want kernel low-level debugging support
 		  on SOCFPGA based platforms.
@@ -851,9 +853,7 @@ config DEBUG_LL_INCLUDE
 	default "debug/nomadik.S" if DEBUG_NOMADIK_UART
 	default "debug/nspire.S" if DEBUG_NSPIRE_CX_UART
 	default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
-	default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART
 	default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
-	default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
 	default "debug/sti.S" if DEBUG_STI_UART
 	default "debug/tegra.S" if DEBUG_TEGRA_UART
 	default "debug/u300.S" if DEBUG_U300_UART
@@ -886,6 +886,7 @@ config DEBUG_UART_PHYS
 	default 0x40100000 if DEBUG_PXA_UART1
 	default 0x42000000 if ARCH_GEMINI
 	default 0x7c0003f8 if FOOTBRIDGE
+	default 0x80230000 if DEBUG_PICOXCELL_UART
 	default 0x90020000 if DEBUG_NSPIRE_CLASSIC_UART
 	default 0xc8000000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
 	default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
@@ -897,6 +898,7 @@ config DEBUG_UART_PHYS
 	default 0xf1012000 if ARCH_DOVE || ARCH_KIRKWOOD || ARCH_MV78XX0 || \
 				ARCH_ORION5X
 	default 0xfe800000 if ARCH_IOP32X
+	default 0xffc02000 if DEBUG_SOCFPGA_UART
 	default 0xffd82340 if ARCH_IOP13XX
 	default 0xfffff700 if ARCH_IOP33X
 	depends on DEBUG_UART_8250
@@ -915,6 +917,7 @@ config DEBUG_UART_VIRT
 	default 0xfe012000 if ARCH_ORION5X
 	default 0xfe017000 if DEBUG_MMP_UART2
 	default 0xfe018000 if DEBUG_MMP_UART3
+	default 0xfe230000 if DEBUG_PICOXCELL_UART
 	default 0xfe800000 if ARCH_IOP32X
 	default 0xfeb24000 if DEBUG_RK3X_UART0
 	default 0xfeb26000 if DEBUG_RK3X_UART1
@@ -922,6 +925,7 @@ config DEBUG_UART_VIRT
 	default 0xfed60000 if DEBUG_RK29_UART0
 	default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
 	default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
+	default 0xfec02000 if DEBUG_SOCFPGA_UART
 	default 0xfed12000 if ARCH_KIRKWOOD
 	default 0xfee003f8 if FOOTBRIDGE
 	default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART
@@ -937,6 +941,12 @@ config DEBUG_UART_8250_SHIFT
 	default 0 if FOOTBRIDGE || ARCH_IOP32X
 	default 2
 
+config DEBUG_UART_8250_WORD
+	bool "Use 32-bit accesses for 8250 UART"
+	depends on DEBUG_UART_8250
+	depends on DEBUG_UART_8250_SHIFT >= 2
+	default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART
+
 config DEBUG_UART_8250_FLOW_CONTROL
 	bool "Enable flow control for 8250 UART"
 	depends on DEBUG_UART_8250
diff --git a/arch/arm/include/debug/8250.S b/arch/arm/include/debug/8250.S
index 92cab39..7a2baf9 100644
--- a/arch/arm/include/debug/8250.S
+++ b/arch/arm/include/debug/8250.S
@@ -14,14 +14,32 @@
 		ldr	\rv, =CONFIG_DEBUG_UART_VIRT
 		.endm
 
+#ifdef CONFIG_DEBUG_UART_8250_WORD
+		.macro	store, rd, rx:vararg
+		str	\rd, \rx
+		.endm
+
+		.macro	load, rd, rx:vararg
+		ldr	\rd, \rx
+		.endm
+#else
+		.macro	store, rd, rx:vararg
+		strb	\rd, \rx
+		.endm
+
+		.macro	load, rd, rx:vararg
+		ldrb	\rd, \rx
+		.endm
+#endif
+
 #define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT
 
 		.macro	senduart,rd,rx
-		strb	\rd, [\rx, #UART_TX << UART_SHIFT]
+		store	\rd, [\rx, #UART_TX << UART_SHIFT]
 		.endm
 
 		.macro	busyuart,rd,rx
-1002:		ldrb	\rd, [\rx, #UART_LSR << UART_SHIFT]
+1002:		load	\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
@@ -29,7 +47,7 @@
 
 		.macro	waituart,rd,rx
 #ifdef CONFIG_DEBUG_UART_8250_FLOW_CONTROL
-1001:		ldrb	\rd, [\rx, #UART_MSR << UART_SHIFT]
+1001:		load	\rd, [\rx, #UART_MSR << UART_SHIFT]
 		tst	\rd, #UART_MSR_CTS
 		beq	1001b
 #endif
diff --git a/arch/arm/include/debug/8250_32.S b/arch/arm/include/debug/8250_32.S
deleted file mode 100644
index 8db01ee..0000000
--- a/arch/arm/include/debug/8250_32.S
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright (c) 2011 Picochip Ltd., Jamie Iles
- *
- * 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.
- *
- * Derived from arch/arm/mach-davinci/include/mach/debug-macro.S to use 32-bit
- * accesses to the 8250.
- */
-
-#include <linux/serial_reg.h>
-
-		.macro	senduart,rd,rx
-		str	\rd, [\rx, #UART_TX << UART_SHIFT]
-		.endm
-
-		.macro	busyuart,rd,rx
-1002:		ldr	\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
-
-		/* The UART's don't have any flow control IO's wired up. */
-		.macro	waituart,rd,rx
-		.endm
diff --git a/arch/arm/include/debug/picoxcell.S b/arch/arm/include/debug/picoxcell.S
deleted file mode 100644
index bc1f07c..0000000
--- a/arch/arm/include/debug/picoxcell.S
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * Copyright (c) 2011 Picochip Ltd., Jamie Iles
- *
- * 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.
- *
- */
-
-#define UART_SHIFT 2
-#define PICOXCELL_UART1_BASE		0x80230000
-#define PHYS_TO_IO(x)			(((x) & 0x00ffffff) | 0xfe000000)
-
-		.macro	addruart, rp, rv, tmp
-		ldr	\rv, =PHYS_TO_IO(PICOXCELL_UART1_BASE)
-		ldr	\rp, =PICOXCELL_UART1_BASE
-		.endm
-
-#include "8250_32.S"
diff --git a/arch/arm/include/debug/socfpga.S b/arch/arm/include/debug/socfpga.S
deleted file mode 100644
index 966b2f9..0000000
--- a/arch/arm/include/debug/socfpga.S
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- *  Copyright (C) 1994-1999 Russell King
- *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
- *
- * 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.
- */
-
-#define UART_SHIFT 2
-#define DEBUG_LL_UART_OFFSET	0x00002000
-
-		.macro	addruart, rp, rv, tmp
-		mov	\rp, #DEBUG_LL_UART_OFFSET
-		orr	\rp, \rp, #0x00c00000
-		orr	\rv, \rp, #0xfe000000	@ virtual base
-		orr	\rp, \rp, #0xff000000	@ physical base
-		.endm
-
-#include "8250_32.S"
-
-- 
1.7.4.4

  parent reply	other threads:[~2013-07-16 16:40 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-16 16:32 [PATCH RFC v2 0/14] Clean up debugging support Russell King - ARM Linux
2013-07-16 16:34 ` [PATCH RFC v2 01/14] ARM: debug: fix wording error in DEBUG_LL_UART_NONE option help Russell King
2013-07-16 16:35 ` [PATCH RFC v2 02/14] ARM: debug: clean up low level kernel debugging selection Russell King
2013-07-16 16:36 ` [PATCH RFC v2 03/14] ARM: debug: provide 8250 debug uart flow control configuration option Russell King
2013-07-16 16:37 ` [PATCH RFC v2 04/14] ARM: debug: provide 8250 debug uart register shift " Russell King
2013-07-16 18:38   ` Santosh Shilimkar
2013-07-16 19:16     ` Russell King - ARM Linux
2013-07-16 19:24       ` Russell King - ARM Linux
2013-07-16 20:09         ` Santosh Shilimkar
2013-07-16 16:38 ` [PATCH RFC v2 05/14] ARM: debug: provide 8250 debug uart phys/virt address configuration options Russell King
2013-07-16 16:39 ` [PATCH RFC v2 06/14] ARM: debug: move 8250 debug include into arch/arm/include/debug/ Russell King
2013-07-16 16:40 ` Russell King [this message]
2013-07-16 16:41 ` [PATCH RFC v2 08/14] ARM: debug: provide PL01x debug uart phys/virt address configuration options Russell King
2013-07-17  9:26   ` Pawel Moll
2013-07-16 16:42 ` [PATCH RFC v2 09/14] ARM: debug: move PL01X debug include into arch/arm/include/debug/ Russell King
2013-07-16 16:43 ` [PATCH RFC v2 10/14] ARM: debug: provide generic option choices for 8250 and PL01x ports Russell King
2013-07-16 16:44 ` [PATCH RFC v2 11/14] ARM: debug: remove DEBUG_ROCKCHIP_UART Russell King
2013-07-16 16:45 ` [PATCH RFC v2 12/14] ARM: debug: move keystone debug to generic 8250 code Russell King
2013-07-16 18:35   ` Santosh Shilimkar
2013-07-16 16:46 ` [PATCH RFC v2 13/14] ARM: debug: move davinci " Russell King
2013-07-17 12:05   ` Sekhar Nori
2013-07-17 17:02     ` Russell King - ARM Linux
2013-07-18 14:08       ` Sekhar Nori
2013-07-16 16:47 ` [PATCH RFC v2 14/14] ARM: debug: move Spear debug to generic PL01x code Russell King
2013-07-17  5:18   ` Viresh Kumar
2013-07-16 23:36 ` [PATCH RFC v2 0/14] Clean up debugging support H Hartley Sweeten
2013-07-17 17:04 ` Russell King - ARM Linux
2013-07-17 17:51   ` H Hartley Sweeten
2013-07-20 16:43   ` Andrew Lunn
2013-07-22 11:06     ` Russell King - ARM Linux
2013-07-22 15:53 ` Andrew Lunn

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