ARM: uniphier: unify low-level debug init code

Move init code of low-level debug into a single file.
This is helpful to create an image that runs on multiple SoCs.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/mach-uniphier/Makefile

@@ -10,6 +10,8 @@ obj-y += spl.o
 obj-y += memconf.o
 obj-y += ddrphy_training.o
 
+obj-$(CONFIG_DEBUG_LL) += debug_ll.o
+
 else
 
 obj-y += late_lowlevel_init.o

arch/arm/mach-uniphier/debug_ll.S

@@ -0,0 +1,112 @@
+/*
+ * On-chip UART initializaion for low-level debugging
+ *
+ * Copyright (C) 2014-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <linux/serial_reg.h>
+#include <linux/linkage.h>
+#include <mach/bcu-regs.h>
+#include <mach/sc-regs.h>
+#include <mach/sg-regs.h>
+
+#if !defined(CONFIG_DEBUG_SEMIHOSTING)
+#include CONFIG_DEBUG_LL_INCLUDE
+#endif
+
+#define BAUDRATE		115200
+#define DIV_ROUND(x, d)		(((x) + ((d) / 2)) / (d))
+
+ENTRY(debug_ll_init)
+	ldr		r0, =SG_REVISION
+	ldr		r1, [r0]
+	and		r1, r1, #SG_REVISION_TYPE_MASK
+	mov		r1, r1, lsr #SG_REVISION_TYPE_SHIFT
+
+#if defined(CONFIG_ARCH_UNIPHIER_PH1_SLD3)
+#define PH1_SLD3_UART_CLK		36864000
+	cmp		r1, #0x25
+	bne		ph1_sld3_end
+
+	sg_set_pinsel	64, 1, 4, 4, r0, r1	@ TXD0 -> TXD0
+
+	ldr		r0, =BCSCR5
+	ldr		r1, =0x24440000
+	str		r1, [r0]
+
+	ldr		r0, =SC_CLKCTRL
+	ldr		r1, [r0]
+	orr		r1, r1, #SC_CLKCTRL_CEN_PERI
+	str		r1, [r0]
+
+	ldr		r3, =DIV_ROUND(PH1_SLD3_UART_CLK, 16 * BAUDRATE)
+
+	b		init_uart
+ph1_sld3_end:
+#endif
+#if defined(CONFIG_ARCH_UNIPHIER_PH1_LD4)
+#define PH1_LD4_UART_CLK		36864000
+	cmp		r1, #0x26
+	bne		ph1_ld4_end
+
+	ldr		r0, =SG_IECTRL
+	ldr		r1, [r0]
+	orr		r1, r1, #1
+	str		r1, [r0]
+
+	sg_set_pinsel	88, 1, 8, 4, r0, r1	@ HSDOUT6 -> TXD0
+
+	ldr		r3, =DIV_ROUND(PH1_LD4_UART_CLK, 16 * BAUDRATE)
+
+	b		init_uart
+ph1_ld4_end:
+#endif
+#if defined(CONFIG_ARCH_UNIPHIER_PH1_PRO4)
+#define PH1_PRO4_UART_CLK		73728000
+	cmp		r1, #0x28
+	bne		ph1_pro4_end
+
+	sg_set_pinsel	128, 0, 4, 8, r0, r1	@ TXD0 -> TXD0
+
+	ldr		r0, =SG_LOADPINCTRL
+	mov		r1, #1
+	str		r1, [r0]
+
+	ldr		r0, =SC_CLKCTRL
+	ldr		r1, [r0]
+	orr		r1, r1, #SC_CLKCTRL_CEN_PERI
+	str		r1, [r0]
+
+	ldr		r3, =DIV_ROUND(PH1_PRO4_UART_CLK, 16 * BAUDRATE)
+
+	b		init_uart
+ph1_pro4_end:
+#endif
+#if defined(CONFIG_ARCH_UNIPHIER_PH1_SLD8)
+#define PH1_SLD8_UART_CLK		80000000
+	cmp		r1, #0x29
+	bne		ph1_sld8_end
+
+	ldr		r0, =SG_IECTRL
+	ldr		r1, [r0]
+	orr		r1, r1, #1
+	str		r1, [r0]
+
+	sg_set_pinsel	70, 3, 8, 4, r0, r1	@ HSDOUT0 -> TXD0
+
+	ldr		r3, =DIV_ROUND(PH1_SLD8_UART_CLK, 16 * BAUDRATE)
+
+	b		init_uart
+ph1_sld8_end:
+#endif
+
+init_uart:
+	addruart	r0, r1, r2
+	mov		r1, #UART_LCR_WLEN8 << 8
+	str		r1, [r0, #0x10]
+	str		r3, [r0, #0x24]
+
+	mov		pc, lr
+ENDPROC(debug_ll_init)

arch/arm/mach-uniphier/include/mach/debug-uart.S

@@ -1,23 +0,0 @@
-/*
- * Copyright (C) 2014-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <linux/serial_reg.h>
-
-#if !defined(CONFIG_DEBUG_SEMIHOSTING)
-#include CONFIG_DEBUG_LL_INCLUDE
-#endif
-
-#define BAUDRATE		115200
-#define DIV_ROUND(x, d)		(((x) + ((d) / 2)) / (d))
-#define DIVISOR			DIV_ROUND(UART_CLK, 16 * BAUDRATE)
-
-	.macro		init_debug_uart, ra, rb, rc
-	addruart	\ra, \rb, \rc
-	mov		\rb, #UART_LCR_WLEN8 << 8
-	str		\rb, [\ra, #0x10]
-	ldr		\rb, =DIVISOR
-	str		\rb, [\ra, #0x24]
-	.endm

arch/arm/mach-uniphier/lowlevel_init.S

@@ -27,7 +27,7 @@ ENTRY(lowlevel_init)
 	mcr	p15, 0, r0, c1, c0, 0
 
 #ifdef CONFIG_DEBUG_LL
-	bl	setup_lowlevel_debug
+	bl	debug_ll_init
 #endif
 
 	/*

arch/arm/mach-uniphier/ph1-ld4/Makefile

@@ -3,7 +3,6 @@
 #
 
 ifdef CONFIG_SPL_BUILD
-obj-$(CONFIG_DEBUG_LL) += lowlevel_debug.o
 obj-y += bcu_init.o pll_init.o early_clkrst_init.o \
 	pll_spectrum.o umc_init.o ddrphy_init.o
 obj-$(CONFIG_MICRO_SUPPORT_CARD) += sbc_init.o

arch/arm/mach-uniphier/ph1-ld4/lowlevel_debug.S

@@ -1,29 +0,0 @@
-/*
- * On-chip UART initializaion for low-level debugging
- *
- * Copyright (C) 2014 Panasonic Corporation
- *   Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <linux/linkage.h>
-#include <mach/sg-regs.h>
-
-#define UART_CLK		36864000
-#include <mach/debug-uart.S>
-
-ENTRY(setup_lowlevel_debug)
-		ldr		r0, =SG_IECTRL
-		ldr		r1, [r0]
-		orr		r1, r1, #1
-		str		r1, [r0]
-
-		/* UART Port 0 */
-		sg_set_pinsel	85, 1, 8, 4, r0, r1
-		sg_set_pinsel	88, 1, 8, 4, r0, r1
-
-		init_debug_uart	r0, r1, r2
-
-		mov		pc, lr
-ENDPROC(setup_lowlevel_debug)

arch/arm/mach-uniphier/ph1-pro4/Makefile

@@ -3,7 +3,6 @@
 #
 
 ifdef CONFIG_SPL_BUILD
-obj-$(CONFIG_DEBUG_LL) += lowlevel_debug.o
 obj-y += pll_init.o early_clkrst_init.o \
 	pll_spectrum.o umc_init.o ddrphy_init.o
 obj-$(CONFIG_MICRO_SUPPORT_CARD) += sbc_init.o

arch/arm/mach-uniphier/ph1-pro4/lowlevel_debug.S

@@ -1,34 +0,0 @@
-/*
- * On-chip UART initializaion for low-level debugging
- *
- * Copyright (C) 2014 Panasonic Corporation
- *   Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <linux/linkage.h>
-#include <mach/sc-regs.h>
-#include <mach/sg-regs.h>
-
-#define UART_CLK		73728000
-#include <mach/debug-uart.S>
-
-ENTRY(setup_lowlevel_debug)
-		/* UART Port 0 */
-		sg_set_pinsel	127, 0, 4, 8, r0, r1
-		sg_set_pinsel	128, 0, 4, 8, r0, r1
-
-		ldr		r0, =SG_LOADPINCTRL
-		mov		r1, #1
-		str		r1, [r0]
-
-		ldr		r0, =SC_CLKCTRL
-		ldr		r1, [r0]
-		orr		r1, r1, #SC_CLKCTRL_CEN_PERI
-		str		r1, [r0]
-
-		init_debug_uart	r0, r1, r2
-
-		mov		pc, lr
-ENDPROC(setup_lowlevel_debug)

arch/arm/mach-uniphier/ph1-sld3/Makefile

@@ -3,7 +3,6 @@
 #
 
 ifdef CONFIG_SPL_BUILD
-obj-$(CONFIG_DEBUG_LL) += lowlevel_debug.o
 obj-y += bcu_init.o memconf.o sg_init.o pll_init.o early_clkrst_init.o \
 	early_pinctrl.o pll_spectrum.o umc_init.o
 obj-$(CONFIG_MICRO_SUPPORT_CARD) += sbc_init.o

arch/arm/mach-uniphier/ph1-sld3/lowlevel_debug.S

@@ -1,33 +0,0 @@
-/*
- * On-chip UART initializaion for low-level debugging
- *
- * Copyright (C) 2014-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <linux/linkage.h>
-#include <mach/bcu-regs.h>
-#include <mach/sc-regs.h>
-#include <mach/sg-regs.h>
-
-#define UART_CLK		36864000
-#include <mach/debug-uart.S>
-
-ENTRY(setup_lowlevel_debug)
-		sg_set_pinsel	63, 0, 4, 4, r0, r1
-		sg_set_pinsel	64, 1, 4, 4, r0, r1
-
-		ldr		r0, =BCSCR5
-		ldr		r1, =0x24440000
-		str		r1, [r0]
-
-		ldr		r0, =SC_CLKCTRL
-		ldr		r1, [r0]
-		orr		r1, r1, #SC_CLKCTRL_CEN_PERI
-		str		r1, [r0]
-
-		init_debug_uart	r0, r1, r2
-
-		mov		pc, lr
-ENDPROC(setup_lowlevel_debug)

arch/arm/mach-uniphier/ph1-sld8/lowlevel_debug.S

@@ -1,29 +0,0 @@
-/*
- * On-chip UART initializaion for low-level debugging
- *
- * Copyright (C) 2014 Panasonic Corporation
- *   Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <linux/linkage.h>
-#include <mach/sg-regs.h>
-
-#define UART_CLK		80000000
-#include <mach/debug-uart.S>
-
-ENTRY(setup_lowlevel_debug)
-		ldr		r0, =SG_IECTRL
-		ldr		r1, [r0]
-		orr		r1, r1, #1
-		str		r1, [r0]
-
-		/* UART Port 0 */
-		sg_set_pinsel	70, 3, 8, 4, r0, r1
-		sg_set_pinsel	71, 3, 8, 4, r0, r1
-
-		init_debug_uart	r0, r1, r2
-
-		mov		pc, lr
-ENDPROC(setup_lowlevel_debug)