GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/arm/mach-uniphier/clk/pll-base-ld20.c

@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 Socionext Inc.
+ *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/sizes.h>
+
+#include "../sc64-regs.h"
+#include "pll.h"
+
+/* PLL type: SSC */
+#define SC_PLLCTRL_SSC_DK_MASK		GENMASK(14, 0)
+#define SC_PLLCTRL_SSC_EN		BIT(31)
+#define SC_PLLCTRL2_NRSTDS		BIT(28)
+#define SC_PLLCTRL2_SSC_JK_MASK		GENMASK(26, 0)
+#define SC_PLLCTRL3_REGI_MASK		GENMASK(19, 16)
+
+/* PLL type: VPLL27 */
+#define SC_VPLL27CTRL_WP		BIT(0)
+#define SC_VPLL27CTRL3_K_LD		BIT(28)
+
+/* PLL type: DSPLL */
+#define SC_DSPLLCTRL2_K_LD		BIT(28)
+
+int uniphier_ld20_sscpll_init(unsigned long reg_base, unsigned int freq,
+			      unsigned int ssc_rate, unsigned int divn)
+{
+	void __iomem *base = sc_base + reg_base;
+	u32 tmp;
+
+	if (freq != UNIPHIER_PLL_FREQ_DEFAULT) {
+		tmp = readl(base);	/* SSCPLLCTRL */
+		tmp &= ~SC_PLLCTRL_SSC_DK_MASK;
+		tmp |= FIELD_PREP(SC_PLLCTRL_SSC_DK_MASK,
+				  DIV_ROUND_CLOSEST(487UL * freq * ssc_rate,
+						    divn * 512));
+		writel(tmp, base);
+
+		tmp = readl(base + 4);
+		tmp &= ~SC_PLLCTRL2_SSC_JK_MASK;
+		tmp |= FIELD_PREP(SC_PLLCTRL2_SSC_JK_MASK,
+				  DIV_ROUND_CLOSEST(21431887UL * freq,
+						    divn * 512));
+		writel(tmp, base + 4);
+
+		udelay(50);
+	}
+
+	tmp = readl(base + 4);		/* SSCPLLCTRL2 */
+	tmp |= SC_PLLCTRL2_NRSTDS;
+	writel(tmp, base + 4);
+
+	return 0;
+}
+
+int uniphier_ld20_sscpll_ssc_en(unsigned long reg_base)
+{
+	void __iomem *base = sc_base + reg_base;
+	u32 tmp;
+
+	tmp = readl(base);	/* SSCPLLCTRL */
+	tmp |= SC_PLLCTRL_SSC_EN;
+	writel(tmp, base);
+
+	return 0;
+}
+
+int uniphier_ld20_sscpll_set_regi(unsigned long reg_base, unsigned regi)
+{
+	void __iomem *base = sc_base + reg_base;
+	u32 tmp;
+
+	tmp = readl(base + 8);	/* SSCPLLCTRL3 */
+	tmp &= ~SC_PLLCTRL3_REGI_MASK;
+	tmp |= FIELD_PREP(SC_PLLCTRL3_REGI_MASK, regi);
+	writel(tmp, base + 8);
+
+	return 0;
+}
+
+int uniphier_ld20_vpll27_init(unsigned long reg_base)
+{
+	void __iomem *base = sc_base + reg_base;
+	u32 tmp;
+
+	tmp = readl(base);		/* VPLL27CTRL */
+	tmp |= SC_VPLL27CTRL_WP;	/* write protect off */
+	writel(tmp, base);
+
+	tmp = readl(base + 8);		/* VPLL27CTRL3 */
+	tmp |= SC_VPLL27CTRL3_K_LD;
+	writel(tmp, base + 8);
+
+	tmp = readl(base);		/* VPLL27CTRL */
+	tmp &= ~SC_VPLL27CTRL_WP;	/* write protect on */
+	writel(tmp, base);
+
+	return 0;
+}
+
+int uniphier_ld20_dspll_init(unsigned long reg_base)
+{
+	void __iomem *base = sc_base + reg_base;
+	u32 tmp;
+
+	tmp = readl(base + 4);		/* DSPLLCTRL2 */
+	tmp |= SC_DSPLLCTRL2_K_LD;
+	writel(tmp, base + 4);
+
+	return 0;
+}