ARM: uniphier: refactor MEMCONF init code

Currently, memconf-sld3.c and memconf-pxs2.c duplicate the code.

There are 3 patterns in terms of MEMCONF init:
  - DRAM 2 channels: LD4, sLD8, Pro4, Pro5, LD11
  - DRAM 3 channels: sLD3
  - DRAM 3 channels (Ch2 is disable by MEMCONF[21]): Pxs2, LD20

All of them can be moved into a single file by a little more
refactoring.

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

arch/arm/mach-uniphier/Makefile

@@ -4,7 +4,8 @@
 
 ifdef CONFIG_SPL_BUILD
 
-obj-y += init/ bcu/ memconf/
+obj-y += memconf.o
+obj-y += init/ bcu/
 obj-$(CONFIG_MICRO_SUPPORT_CARD) += sbc/
 
 else

arch/arm/mach-uniphier/init.h

@@ -77,9 +77,9 @@ static inline int uniphier_pxs2_sbc_init(const struct uniphier_board_data *bd)
 int uniphier_sld3_bcu_init(const struct uniphier_board_data *bd);
 int uniphier_ld4_bcu_init(const struct uniphier_board_data *bd);
 
-int memconf_init(const struct uniphier_board_data *bd);
+int uniphier_memconf_2ch_init(const struct uniphier_board_data *bd);
-int uniphier_sld3_memconf_init(const struct uniphier_board_data *bd);
+int uniphier_memconf_3ch_no_disbit_init(const struct uniphier_board_data *bd);
-int uniphier_pxs2_memconf_init(const struct uniphier_board_data *bd);
+int uniphier_memconf_3ch_init(const struct uniphier_board_data *bd);
 
 int uniphier_sld3_dpll_init(const struct uniphier_board_data *bd);
 int uniphier_ld4_dpll_init(const struct uniphier_board_data *bd);

arch/arm/mach-uniphier/init/init-ld11.c

@@ -25,7 +25,7 @@ int uniphier_ld11_init(const struct uniphier_board_data *bd)
 
 	led_puts("L0");
 
-	memconf_init(bd);
+	uniphier_memconf_2ch_init(bd);
 
 	led_puts("L1");
 

arch/arm/mach-uniphier/init/init-ld20.c

@@ -25,8 +25,7 @@ int uniphier_ld20_init(const struct uniphier_board_data *bd)
 
 	led_puts("L0");
 
-	memconf_init(bd);
+	uniphier_memconf_3ch_init(bd);
-	uniphier_pxs2_memconf_init(bd);
 
 	led_puts("L1");
 

arch/arm/mach-uniphier/init/init-ld4.c

@@ -27,7 +27,7 @@ int uniphier_ld4_init(const struct uniphier_board_data *bd)
 
 	led_puts("L0");
 
-	memconf_init(bd);
+	uniphier_memconf_2ch_init(bd);
 
 	led_puts("L1");
 

arch/arm/mach-uniphier/init/init-pro4.c

@@ -24,7 +24,7 @@ int uniphier_pro4_init(const struct uniphier_board_data *bd)
 
 	led_puts("L0");
 
-	memconf_init(bd);
+	uniphier_memconf_2ch_init(bd);
 
 	led_puts("L1");
 

arch/arm/mach-uniphier/init/init-pro5.c

@@ -20,7 +20,7 @@ int uniphier_pro5_init(const struct uniphier_board_data *bd)
 
 	led_puts("L0");
 
-	memconf_init(bd);
+	uniphier_memconf_2ch_init(bd);
 
 	led_puts("L1");
 

arch/arm/mach-uniphier/init/init-pxs2.c

@@ -23,8 +23,7 @@ int uniphier_pxs2_init(const struct uniphier_board_data *bd)
 
 	led_puts("L0");
 
-	memconf_init(bd);
+	uniphier_memconf_3ch_init(bd);
-	uniphier_pxs2_memconf_init(bd);
 
 	led_puts("L1");
 

arch/arm/mach-uniphier/init/init-sld3.c

@@ -26,8 +26,7 @@ int uniphier_sld3_init(const struct uniphier_board_data *bd)
 
 	led_puts("L0");
 
-	memconf_init(bd);
+	uniphier_memconf_3ch_no_disbit_init(bd);
-	uniphier_sld3_memconf_init(bd);
 
 	led_puts("L1");
 

arch/arm/mach-uniphier/init/init-sld8.c

@@ -27,7 +27,7 @@ int uniphier_sld8_init(const struct uniphier_board_data *bd)
 
 	led_puts("L0");
 
-	memconf_init(bd);
+	uniphier_memconf_2ch_init(bd);
 
 	led_puts("L1");
 

arch/arm/mach-uniphier/memconf.c

@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2011-2015 Panasonic Corporation
+ * Copyright (C) 2016      Socionext Inc.
+ *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/sizes.h>
+
+#include "sg-regs.h"
+#include "init.h"
+
+static int __uniphier_memconf_init(const struct uniphier_board_data *bd,
+				   int have_ch2, int have_ch2_disable_bit)
+{
+	u32 val = 0;
+	unsigned long size_per_word;
+
+	/* set up ch0 */
+	switch (bd->dram_ch[0].width) {
+	case 16:
+		val |= SG_MEMCONF_CH0_NUM_1;
+		size_per_word = bd->dram_ch[0].size;
+		break;
+	case 32:
+		val |= SG_MEMCONF_CH0_NUM_2;
+		size_per_word = bd->dram_ch[0].size >> 1;
+		break;
+	default:
+		pr_err("error: unsupported DRAM ch0 width\n");
+		return -EINVAL;
+	}
+
+	switch (size_per_word) {
+	case SZ_64M:
+		val |= SG_MEMCONF_CH0_SZ_64M;
+		break;
+	case SZ_128M:
+		val |= SG_MEMCONF_CH0_SZ_128M;
+		break;
+	case SZ_256M:
+		val |= SG_MEMCONF_CH0_SZ_256M;
+		break;
+	case SZ_512M:
+		val |= SG_MEMCONF_CH0_SZ_512M;
+		break;
+	case SZ_1G:
+		val |= SG_MEMCONF_CH0_SZ_1G;
+		break;
+	default:
+		pr_err("error: unsupported DRAM ch0 size\n");
+		return -EINVAL;
+	}
+
+	/* set up ch1 */
+	switch (bd->dram_ch[1].width) {
+	case 16:
+		val |= SG_MEMCONF_CH1_NUM_1;
+		size_per_word = bd->dram_ch[1].size;
+		break;
+	case 32:
+		val |= SG_MEMCONF_CH1_NUM_2;
+		size_per_word = bd->dram_ch[1].size >> 1;
+		break;
+	default:
+		pr_err("error: unsupported DRAM ch1 width\n");
+		return -EINVAL;
+	}
+
+	switch (size_per_word) {
+	case SZ_64M:
+		val |= SG_MEMCONF_CH1_SZ_64M;
+		break;
+	case SZ_128M:
+		val |= SG_MEMCONF_CH1_SZ_128M;
+		break;
+	case SZ_256M:
+		val |= SG_MEMCONF_CH1_SZ_256M;
+		break;
+	case SZ_512M:
+		val |= SG_MEMCONF_CH1_SZ_512M;
+		break;
+	case SZ_1G:
+		val |= SG_MEMCONF_CH1_SZ_1G;
+		break;
+	default:
+		pr_err("error: unsupported DRAM ch1 size\n");
+		return -EINVAL;
+	}
+
+	/* is sparse mem? */
+	if (bd->dram_ch[0].base + bd->dram_ch[0].size < bd->dram_ch[1].base)
+		val |= SG_MEMCONF_SPARSEMEM;
+
+	if (!have_ch2)
+		goto out;
+
+	if (!bd->dram_ch[2].size) {
+		if (have_ch2_disable_bit)
+			val |= SG_MEMCONF_CH2_DISABLE;
+		goto out;
+	}
+
+	/* set up ch2 */
+	switch (bd->dram_ch[2].width) {
+	case 16:
+		val |= SG_MEMCONF_CH2_NUM_1;
+		size_per_word = bd->dram_ch[2].size;
+		break;
+	case 32:
+		val |= SG_MEMCONF_CH2_NUM_2;
+		size_per_word = bd->dram_ch[2].size >> 1;
+		break;
+	default:
+		pr_err("error: unsupported DRAM ch2 width\n");
+		return -EINVAL;
+	}
+
+	switch (size_per_word) {
+	case SZ_64M:
+		val |= SG_MEMCONF_CH2_SZ_64M;
+		break;
+	case SZ_128M:
+		val |= SG_MEMCONF_CH2_SZ_128M;
+		break;
+	case SZ_256M:
+		val |= SG_MEMCONF_CH2_SZ_256M;
+		break;
+	case SZ_512M:
+		val |= SG_MEMCONF_CH2_SZ_512M;
+		break;
+	case SZ_1G:
+		val |= SG_MEMCONF_CH2_SZ_1G;
+		break;
+	default:
+		pr_err("error: unsupported DRAM ch2 size\n");
+		return -EINVAL;
+	}
+
+out:
+	writel(val, SG_MEMCONF);
+
+	return 0;
+}
+
+int uniphier_memconf_2ch_init(const struct uniphier_board_data *bd)
+{
+	return __uniphier_memconf_init(bd, 0, 0);
+}
+
+int uniphier_memconf_3ch_no_disbit_init(const struct uniphier_board_data *bd)
+{
+	return __uniphier_memconf_init(bd, 1, 0);
+}
+
+int uniphier_memconf_3ch_init(const struct uniphier_board_data *bd)
+{
+	return __uniphier_memconf_init(bd, 1, 1);
+}

arch/arm/mach-uniphier/memconf/Makefile

@@ -1,9 +0,0 @@
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
-
-obj-y					+= memconf.o
-obj-$(CONFIG_ARCH_UNIPHIER_SLD3)	+= memconf-sld3.o
-obj-$(CONFIG_ARCH_UNIPHIER_PXS2)	+= memconf-pxs2.o
-obj-$(CONFIG_ARCH_UNIPHIER_LD6B)	+= memconf-pxs2.o
-obj-$(CONFIG_ARCH_UNIPHIER_LD20)	+= memconf-pxs2.o

arch/arm/mach-uniphier/memconf/memconf-pxs2.c

@@ -1,68 +0,0 @@
-/*
- * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <common.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/sizes.h>
-
-#include "../init.h"
-#include "../sg-regs.h"
-
-int uniphier_pxs2_memconf_init(const struct uniphier_board_data *bd)
-{
-	u32 tmp;
-	unsigned long size_per_word;
-
-	tmp = readl(SG_MEMCONF);
-
-	tmp &= ~(SG_MEMCONF_CH2_SZ_MASK | SG_MEMCONF_CH2_NUM_MASK);
-
-	switch (bd->dram_ch[2].width) {
-	case 16:
-		tmp |= SG_MEMCONF_CH2_NUM_1;
-		size_per_word = bd->dram_ch[2].size;
-		break;
-	case 32:
-		tmp |= SG_MEMCONF_CH2_NUM_2;
-		size_per_word = bd->dram_ch[2].size >> 1;
-		break;
-	default:
-		pr_err("error: unsupported DRAM Ch2 width\n");
-		return -EINVAL;
-	}
-
-	/* Set DDR size */
-	switch (size_per_word) {
-	case SZ_64M:
-		tmp |= SG_MEMCONF_CH2_SZ_64M;
-		break;
-	case SZ_128M:
-		tmp |= SG_MEMCONF_CH2_SZ_128M;
-		break;
-	case SZ_256M:
-		tmp |= SG_MEMCONF_CH2_SZ_256M;
-		break;
-	case SZ_512M:
-		tmp |= SG_MEMCONF_CH2_SZ_512M;
-		break;
-	case SZ_1G:
-		tmp |= SG_MEMCONF_CH2_SZ_1G;
-		break;
-	default:
-		pr_err("error: unsupported DRAM Ch2 size\n");
-		return -EINVAL;
-	}
-
-	if (size_per_word)
-		tmp &= ~SG_MEMCONF_CH2_DISABLE;
-	else
-		tmp |= SG_MEMCONF_CH2_DISABLE;
-
-	writel(tmp, SG_MEMCONF);
-
-	return 0;
-}

arch/arm/mach-uniphier/memconf/memconf-sld3.c

@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <common.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/sizes.h>
-
-#include "../init.h"
-#include "../sg-regs.h"
-
-int uniphier_sld3_memconf_init(const struct uniphier_board_data *bd)
-{
-	u32 tmp;
-	unsigned long size_per_word;
-
-	tmp = readl(SG_MEMCONF);
-
-	tmp &= ~(SG_MEMCONF_CH2_SZ_MASK | SG_MEMCONF_CH2_NUM_MASK);
-
-	switch (bd->dram_ch[2].width) {
-	case 16:
-		tmp |= SG_MEMCONF_CH2_NUM_1;
-		size_per_word = bd->dram_ch[2].size;
-		break;
-	case 32:
-		tmp |= SG_MEMCONF_CH2_NUM_2;
-		size_per_word = bd->dram_ch[2].size >> 1;
-		break;
-	default:
-		pr_err("error: unsupported DRAM Ch2 width\n");
-		return -EINVAL;
-	}
-
-	/* Set DDR size */
-	switch (size_per_word) {
-	case SZ_64M:
-		tmp |= SG_MEMCONF_CH2_SZ_64M;
-		break;
-	case SZ_128M:
-		tmp |= SG_MEMCONF_CH2_SZ_128M;
-		break;
-	case SZ_256M:
-		tmp |= SG_MEMCONF_CH2_SZ_256M;
-		break;
-	case SZ_512M:
-		tmp |= SG_MEMCONF_CH2_SZ_512M;
-		break;
-	default:
-		pr_err("error: unsupported DRAM Ch2 size\n");
-		return -EINVAL;
-	}
-
-	writel(tmp, SG_MEMCONF);
-
-	return 0;
-}

arch/arm/mach-uniphier/memconf/memconf.c

@@ -1,107 +0,0 @@
-/*
- * Copyright (C) 2011-2015 Panasonic Corporation
- * Copyright (C) 2016      Socionext Inc.
- *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <common.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/sizes.h>
-
-#include "../init.h"
-#include "../sg-regs.h"
-
-int memconf_init(const struct uniphier_board_data *bd)
-{
-	u32 tmp;
-	unsigned long size_per_word;
-
-	tmp = readl(SG_MEMCONF);
-
-	tmp &= ~(SG_MEMCONF_CH0_SZ_MASK | SG_MEMCONF_CH0_NUM_MASK);
-
-	switch (bd->dram_ch[0].width) {
-	case 16:
-		tmp |= SG_MEMCONF_CH0_NUM_1;
-		size_per_word = bd->dram_ch[0].size;
-		break;
-	case 32:
-		tmp |= SG_MEMCONF_CH0_NUM_2;
-		size_per_word = bd->dram_ch[0].size >> 1;
-		break;
-	default:
-		pr_err("error: unsupported DRAM Ch0 width\n");
-		return -EINVAL;
-	}
-
-	/* Set DDR size */
-	switch (size_per_word) {
-	case SZ_64M:
-		tmp |= SG_MEMCONF_CH0_SZ_64M;
-		break;
-	case SZ_128M:
-		tmp |= SG_MEMCONF_CH0_SZ_128M;
-		break;
-	case SZ_256M:
-		tmp |= SG_MEMCONF_CH0_SZ_256M;
-		break;
-	case SZ_512M:
-		tmp |= SG_MEMCONF_CH0_SZ_512M;
-		break;
-	case SZ_1G:
-		tmp |= SG_MEMCONF_CH0_SZ_1G;
-		break;
-	default:
-		pr_err("error: unsupported DRAM Ch0 size\n");
-		return -EINVAL;
-	}
-
-	tmp &= ~(SG_MEMCONF_CH1_SZ_MASK | SG_MEMCONF_CH1_NUM_MASK);
-
-	switch (bd->dram_ch[1].width) {
-	case 16:
-		tmp |= SG_MEMCONF_CH1_NUM_1;
-		size_per_word = bd->dram_ch[1].size;
-		break;
-	case 32:
-		tmp |= SG_MEMCONF_CH1_NUM_2;
-		size_per_word = bd->dram_ch[1].size >> 1;
-		break;
-	default:
-		pr_err("error: unsupported DRAM Ch1 width\n");
-		return -EINVAL;
-	}
-
-	switch (size_per_word) {
-	case SZ_64M:
-		tmp |= SG_MEMCONF_CH1_SZ_64M;
-		break;
-	case SZ_128M:
-		tmp |= SG_MEMCONF_CH1_SZ_128M;
-		break;
-	case SZ_256M:
-		tmp |= SG_MEMCONF_CH1_SZ_256M;
-		break;
-	case SZ_512M:
-		tmp |= SG_MEMCONF_CH1_SZ_512M;
-		break;
-	case SZ_1G:
-		tmp |= SG_MEMCONF_CH1_SZ_1G;
-		break;
-	default:
-		pr_err("error: unsupported DRAM Ch1 size\n");
-		return -EINVAL;
-	}
-
-	if (bd->dram_ch[0].base + bd->dram_ch[0].size < bd->dram_ch[1].base)
-		tmp |= SG_MEMCONF_SPARSEMEM;
-	else
-		tmp &= ~SG_MEMCONF_SPARSEMEM;
-
-	writel(tmp, SG_MEMCONF);
-
-	return 0;
-}