ARM: uniphier: collect clock/PLL init code into a single directory

Now PLLs for DRAM controller are initialized in SPL, and the others
in U-Boot proper.  Setting up all of them in a single directory will
be helpful when we want to share code between SPL and U-Boot proper.

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

10 files changed, 392 insertions, 0 deletions

diff --git a/arch/arm/mach-uniphier/clk/Makefile b/arch/arm/mach-uniphier/clk/Makefile
index b722781..233e659 100644
--- a/arch/arm/mach-uniphier/clk/Makefile
+++ b/arch/arm/mach-uniphier/clk/Makefile
@@ -2,6 +2,20 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
+ifdef CONFIG_SPL_BUILD
+
+obj-$(CONFIG_ARCH_UNIPHIER_SLD3)	+= early-clk-ld4.o dpll-sld3.o
+obj-$(CONFIG_ARCH_UNIPHIER_LD4)		+= early-clk-ld4.o dpll-ld4.o
+obj-$(CONFIG_ARCH_UNIPHIER_PRO4)	+= early-clk-ld4.o dpll-pro4.o
+obj-$(CONFIG_ARCH_UNIPHIER_SLD8)	+= early-clk-ld4.o dpll-sld8.o
+obj-$(CONFIG_ARCH_UNIPHIER_PRO5)	+= early-clk-pro5.o
+obj-$(CONFIG_ARCH_UNIPHIER_PXS2)	+= early-clk-pxs2.o
+obj-$(CONFIG_ARCH_UNIPHIER_LD6B)	+= early-clk-pxs2.o
+obj-$(CONFIG_ARCH_UNIPHIER_LD11)	+= early-clk-ld11.o
+obj-$(CONFIG_ARCH_UNIPHIER_LD20)	+= early-clk-ld20.o
+
+else
+
 obj-$(CONFIG_ARCH_UNIPHIER_SLD3)	+= clk-ld4.o pll-sld3.o dpll-tail.o
 obj-$(CONFIG_ARCH_UNIPHIER_LD4)		+= clk-ld4.o pll-ld4.o dpll-tail.o
 obj-$(CONFIG_ARCH_UNIPHIER_PRO4)	+= clk-pro4.o pll-pro4.o dpll-tail.o
@@ -11,3 +25,5 @@ obj-$(CONFIG_ARCH_UNIPHIER_PXS2)	+= clk-pxs2.o
 obj-$(CONFIG_ARCH_UNIPHIER_LD6B)	+= clk-pxs2.o
 obj-$(CONFIG_ARCH_UNIPHIER_LD11)	+= clk-ld11.o
 obj-$(CONFIG_ARCH_UNIPHIER_LD20)	+= clk-ld20.o
+
+endif
diff --git a/arch/arm/mach-uniphier/clk/dpll-ld4.c b/arch/arm/mach-uniphier/clk/dpll-ld4.c
new file mode 100644
index 0000000..a40b30d
--- /dev/null
+++ b/arch/arm/mach-uniphier/clk/dpll-ld4.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2013-2014 Panasonic Corporation
+ * Copyright (C) 2015-2016 Socionext Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include "../init.h"
+#include "../sc-regs.h"
+
+#undef DPLL_SSC_RATE_1PER
+
+int uniphier_ld4_dpll_init(const struct uniphier_board_data *bd)
+{
+	unsigned int dram_freq = bd->dram_freq;
+	u32 tmp;
+
+	/*
+	 * Set Frequency
+	 * Set 0xc(1600MHz)/0xd(1333MHz)/0xe(1066MHz)
+	 * to FOUT (DPLLCTRL.bit[29:20])
+	 */
+	tmp = readl(SC_DPLLCTRL);
+	tmp &= ~0x000f0000;
+	switch (dram_freq) {
+	case 1333:
+		tmp |= 0x000d0000;
+		break;
+	case 1600:
+		tmp |= 0x000c0000;
+		break;
+	default:
+		pr_err("Unsupported frequency");
+		return -EINVAL;
+	}
+
+#if defined(DPLL_SSC_RATE_1PER)
+	tmp &= ~SC_DPLLCTRL_SSC_RATE;
+#else
+	tmp |= SC_DPLLCTRL_SSC_RATE;
+#endif
+	writel(tmp, SC_DPLLCTRL);
+
+	tmp = readl(SC_DPLLCTRL2);
+	tmp |= SC_DPLLCTRL2_NRSTDS;
+	writel(tmp, SC_DPLLCTRL2);
+
+	/* Wait 500 usec until dpll gets stable */
+	udelay(500);
+
+	return 0;
+}
diff --git a/arch/arm/mach-uniphier/clk/dpll-pro4.c b/arch/arm/mach-uniphier/clk/dpll-pro4.c
new file mode 100644
index 0000000..3ac48d6
--- /dev/null
+++ b/arch/arm/mach-uniphier/clk/dpll-pro4.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2013-2014 Panasonic Corporation
+ * Copyright (C) 2015-2016 Socionext Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include "../init.h"
+#include "../sc-regs.h"
+
+#undef DPLL_SSC_RATE_1PER
+
+int uniphier_pro4_dpll_init(const struct uniphier_board_data *bd)
+{
+	unsigned int dram_freq = bd->dram_freq;
+	u32 tmp;
+
+	/*
+	 * Set Frequency
+	 * Set 0xc(1600MHz)/0xd(1333MHz)/0xe(1066MHz)
+	 * to FOUT ( DPLLCTRL.bit[29:20] )
+	 */
+	tmp = readl(SC_DPLLCTRL);
+	tmp &= ~(0x000f0000);
+	switch (dram_freq) {
+	case 1333:
+		tmp |= 0x000d0000;
+		break;
+	case 1600:
+		tmp |= 0x000c0000;
+		break;
+	default:
+		pr_err("Unsupported frequency");
+		return -EINVAL;
+	}
+
+	/*
+	 * Set Moduration rate
+	 * Set 0x0(1%)/0x1(2%) to SSC_RATE(DPLLCTRL.bit[15])
+	 */
+#if defined(DPLL_SSC_RATE_1PER)
+	tmp &= ~0x00008000;
+#else
+	tmp |= 0x00008000;
+#endif
+	writel(tmp, SC_DPLLCTRL);
+
+	tmp = readl(SC_DPLLCTRL2);
+	tmp |= SC_DPLLCTRL2_NRSTDS;
+	writel(tmp, SC_DPLLCTRL2);
+
+	/* Wait until dpll gets stable */
+	udelay(500);
+
+	return 0;
+}
diff --git a/arch/arm/mach-uniphier/clk/dpll-sld3.c b/arch/arm/mach-uniphier/clk/dpll-sld3.c
new file mode 100644
index 0000000..0eb310c
--- /dev/null
+++ b/arch/arm/mach-uniphier/clk/dpll-sld3.c
@@ -0,0 +1,13 @@
+/*
+ * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include "../init.h"
+
+int uniphier_sld3_dpll_init(const struct uniphier_board_data *bd)
+{
+	/* add pll init code here */
+	return 0;
+}
diff --git a/arch/arm/mach-uniphier/clk/dpll-sld8.c b/arch/arm/mach-uniphier/clk/dpll-sld8.c
new file mode 100644
index 0000000..7faa5e8
--- /dev/null
+++ b/arch/arm/mach-uniphier/clk/dpll-sld8.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2013-2014 Panasonic Corporation
+ * Copyright (C) 2015-2016 Socionext Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <linux/io.h>
+
+#include "../init.h"
+#include "../sc-regs.h"
+
+int uniphier_sld8_dpll_init(const struct uniphier_board_data *bd)
+{
+	u32 tmp;
+	/*
+	 * Set DPLL SSC parameters for DPLLCTRL3
+	 * [23]    DIVN_TEST    0x1
+	 * [22:16] DIVN         0x50
+	 * [10]    FREFSEL_TEST 0x1
+	 * [9:8]   FREFSEL      0x2
+	 * [4]     ICPD_TEST    0x1
+	 * [3:0]   ICPD         0xb
+	 */
+	tmp = readl(SC_DPLLCTRL3);
+	tmp &= ~0x00ff0717;
+	tmp |= 0x00d0061b;
+	writel(tmp, SC_DPLLCTRL3);
+
+	/*
+	 * Set DPLL SSC parameters for DPLLCTRL
+	 *                    <-1%>          <-2%>
+	 * [29:20] SSC_UPCNT 132 (0x084)    132  (0x084)
+	 * [14:0]  SSC_dK    6335(0x18bf)   12710(0x31a6)
+	 */
+	tmp = readl(SC_DPLLCTRL);
+	tmp &= ~0x3ff07fff;
+#ifdef DPLL_SSC_RATE_1PER
+	tmp |= 0x084018bf;
+#else
+	tmp |= 0x084031a6;
+#endif
+	writel(tmp, SC_DPLLCTRL);
+
+	/*
+	 * Set DPLL SSC parameters for DPLLCTRL2
+	 * [31:29]  SSC_STEP     0
+	 * [27]     SSC_REG_REF  1
+	 * [26:20]  SSC_M        79     (0x4f)
+	 * [19:0]   SSC_K        964689 (0xeb851)
+	 */
+	tmp = readl(SC_DPLLCTRL2);
+	tmp &= ~0xefffffff;
+	tmp |= 0x0cfeb851;
+	writel(tmp, SC_DPLLCTRL2);
+
+	/* Wait 500 usec until dpll gets stable */
+	udelay(500);
+
+	return 0;
+}
diff --git a/arch/arm/mach-uniphier/clk/early-clk-ld11.c b/arch/arm/mach-uniphier/clk/early-clk-ld11.c
new file mode 100644
index 0000000..c94d83c
--- /dev/null
+++ b/arch/arm/mach-uniphier/clk/early-clk-ld11.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2016 Socionext Inc.
+ *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <linux/io.h>
+
+#include "../init.h"
+#include "../sc64-regs.h"
+
+int uniphier_ld11_early_clk_init(const struct uniphier_board_data *bd)
+{
+	u32 tmp;
+
+	/* deassert reset */
+	tmp = readl(SC_RSTCTRL7);
+	tmp |= SC_RSTCTRL7_UMC31 | SC_RSTCTRL7_UMC30;
+	writel(tmp, SC_RSTCTRL7);
+
+	/* provide clocks */
+	tmp = readl(SC_CLKCTRL4);
+	tmp |= SC_CLKCTRL4_PERI;
+	writel(tmp, SC_CLKCTRL4);
+
+	tmp = readl(SC_CLKCTRL7);
+	tmp |= SC_CLKCTRL7_UMC31 | SC_CLKCTRL7_UMC30;
+	writel(tmp, SC_CLKCTRL7);
+
+	return 0;
+}
diff --git a/arch/arm/mach-uniphier/clk/early-clk-ld20.c b/arch/arm/mach-uniphier/clk/early-clk-ld20.c
new file mode 100644
index 0000000..5201a55
--- /dev/null
+++ b/arch/arm/mach-uniphier/clk/early-clk-ld20.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <linux/io.h>
+
+#include "../init.h"
+#include "../sc64-regs.h"
+
+int uniphier_ld20_early_clk_init(const struct uniphier_board_data *bd)
+{
+	u32 tmp;
+
+	/* deassert reset */
+	tmp = readl(SC_RSTCTRL7);
+	tmp |= SC_RSTCTRL7_UMCSB | SC_RSTCTRL7_UMCA2 | SC_RSTCTRL7_UMCA1 |
+		SC_RSTCTRL7_UMCA0 | SC_RSTCTRL7_UMC32 | SC_RSTCTRL7_UMC31 |
+		SC_RSTCTRL7_UMC30;
+	writel(tmp, SC_RSTCTRL7);
+
+	/* provide clocks */
+	tmp = readl(SC_CLKCTRL4);
+	tmp |= SC_CLKCTRL4_PERI;
+	writel(tmp, SC_CLKCTRL4);
+
+	tmp = readl(SC_CLKCTRL7);
+	tmp |= SC_CLKCTRL7_UMCSB | SC_CLKCTRL7_UMC32 | SC_CLKCTRL7_UMC31 |
+							SC_CLKCTRL7_UMC30;
+	writel(tmp, SC_CLKCTRL7);
+
+	return 0;
+}
diff --git a/arch/arm/mach-uniphier/clk/early-clk-ld4.c b/arch/arm/mach-uniphier/clk/early-clk-ld4.c
new file mode 100644
index 0000000..b6e8b64
--- /dev/null
+++ b/arch/arm/mach-uniphier/clk/early-clk-ld4.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2011-2015 Masahiro Yamada <yamada.m@jp.panasonic.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <spl.h>
+#include <linux/io.h>
+
+#include "../init.h"
+#include "../sc-regs.h"
+
+int uniphier_ld4_early_clk_init(const struct uniphier_board_data *bd)
+{
+	u32 tmp;
+
+	/* deassert reset */
+	tmp = readl(SC_RSTCTRL);
+
+	tmp |= SC_RSTCTRL_NRST_UMC1 | SC_RSTCTRL_NRST_UMC0;
+	if (spl_boot_device() != BOOT_DEVICE_NAND)
+		tmp &= ~SC_RSTCTRL_NRST_NAND;
+	writel(tmp, SC_RSTCTRL);
+	readl(SC_RSTCTRL); /* dummy read */
+
+	/* provide clocks */
+	tmp = readl(SC_CLKCTRL);
+	tmp |= SC_CLKCTRL_CEN_UMC | SC_CLKCTRL_CEN_SBC | SC_CLKCTRL_CEN_PERI;
+	writel(tmp, SC_CLKCTRL);
+	readl(SC_CLKCTRL); /* dummy read */
+
+	return 0;
+}
diff --git a/arch/arm/mach-uniphier/clk/early-clk-pro5.c b/arch/arm/mach-uniphier/clk/early-clk-pro5.c
new file mode 100644
index 0000000..c41a8ea
--- /dev/null
+++ b/arch/arm/mach-uniphier/clk/early-clk-pro5.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2015 Masahiro Yamada <yamada.m@jp.panasonic.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <linux/io.h>
+
+#include "../init.h"
+#include "../sc-regs.h"
+
+int uniphier_pro5_early_clk_init(const struct uniphier_board_data *bd)
+{
+	u32 tmp;
+
+	/*
+	 * deassert reset
+	 * UMCA2: Ch1 (DDR3)
+	 * UMCA1, UMC31: Ch0 (WIO1)
+	 * UMCA0, UMC30: Ch0 (WIO0)
+	 */
+	tmp = readl(SC_RSTCTRL4);
+	tmp |= SC_RSTCTRL4_NRST_UMCSB | SC_RSTCTRL4_NRST_UMCA2 |
+	       SC_RSTCTRL4_NRST_UMCA1 | SC_RSTCTRL4_NRST_UMCA0 |
+	       SC_RSTCTRL4_NRST_UMC31 | SC_RSTCTRL4_NRST_UMC30;
+	writel(tmp, SC_RSTCTRL4);
+	readl(SC_RSTCTRL); /* dummy read */
+
+	/* provide clocks */
+	tmp = readl(SC_CLKCTRL);
+	tmp |= SC_CLKCTRL_CEN_SBC | SC_CLKCTRL_CEN_PERI;
+	writel(tmp, SC_CLKCTRL);
+	tmp = readl(SC_CLKCTRL4);
+	tmp |= SC_CLKCTRL4_CEN_UMCSB | SC_CLKCTRL4_CEN_UMC1 |
+	       SC_CLKCTRL4_CEN_UMC0;
+	writel(tmp, SC_CLKCTRL4);
+	readl(SC_CLKCTRL4); /* dummy read */
+
+	return 0;
+}
diff --git a/arch/arm/mach-uniphier/clk/early-clk-pxs2.c b/arch/arm/mach-uniphier/clk/early-clk-pxs2.c
new file mode 100644
index 0000000..665ecd5
--- /dev/null
+++ b/arch/arm/mach-uniphier/clk/early-clk-pxs2.c
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <spl.h>
+#include <linux/io.h>
+
+#include "../init.h"
+#include "../sc-regs.h"
+
+int uniphier_pxs2_early_clk_init(const struct uniphier_board_data *bd)
+{
+	u32 tmp;
+
+	/* deassert reset */
+	if (spl_boot_device() != BOOT_DEVICE_NAND) {
+		tmp = readl(SC_RSTCTRL);
+		tmp &= ~SC_RSTCTRL_NRST_NAND;
+		writel(tmp, SC_RSTCTRL);
+	};
+
+	tmp = readl(SC_RSTCTRL4);
+	tmp |= SC_RSTCTRL4_NRST_UMCSB | SC_RSTCTRL4_NRST_UMCA2 |
+	       SC_RSTCTRL4_NRST_UMCA1 | SC_RSTCTRL4_NRST_UMCA0 |
+	       SC_RSTCTRL4_NRST_UMC32 | SC_RSTCTRL4_NRST_UMC31 |
+	       SC_RSTCTRL4_NRST_UMC30;
+	writel(tmp, SC_RSTCTRL4);
+	readl(SC_RSTCTRL4); /* dummy read */
+
+	/* provide clocks */
+	tmp = readl(SC_CLKCTRL);
+	tmp |= SC_CLKCTRL_CEN_SBC | SC_CLKCTRL_CEN_PERI;
+	writel(tmp, SC_CLKCTRL);
+
+	tmp = readl(SC_CLKCTRL4);
+	tmp |= SC_CLKCTRL4_CEN_UMCSB | SC_CLKCTRL4_CEN_UMC2 |
+	       SC_CLKCTRL4_CEN_UMC1 | SC_CLKCTRL4_CEN_UMC0;
+	writel(tmp, SC_CLKCTRL4);
+	readl(SC_CLKCTRL4); /* dummy read */
+
+	return 0;
+}