ARM: uniphier: allow to enable multiple SoCs
Before this commit, the Kconfig menu in mach-uniphier only allowed us
to choose one SoC to be compiled. Each SoC has its own defconfig file
for the build-test coverage. Consequently, some defconfig files are
duplicated with only the difference in CONFIG_DEFAULT_DEVICE_TREE and
CONFIG_{SOC_NAME}=y.
Now, most of board-specific parameters have been moved to device trees,
so it makes sense to include init code of multiple SoCs into a single
image as long as the SoCs have similar architecture. In fact, some
SoCs of UniPhier family are very similar:
- PH1-LD4 and PH1-sLD8
- PH1-LD6b and ProXstream2 (will be added in the upcoming commit)
This commit will be helpful to merge some defconfig files for better
maintainability.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/pll/pll-init-ph1-pro4.c b/arch/arm/mach-uniphier/pll/pll-init-ph1-pro4.c
new file mode 100644
index 0000000..906c22f
--- /dev/null
+++ b/arch/arm/mach-uniphier/pll/pll-init-ph1-pro4.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <mach/init.h>
+#include <mach/sc-regs.h>
+#include <mach/sg-regs.h>
+
+#undef DPLL_SSC_RATE_1PER
+
+static int dpll_init(unsigned int 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);
+
+ return 0;
+}
+
+static void vpll_init(void)
+{
+ u32 tmp, clk_mode_axosel;
+
+ /* Set VPLL27A & VPLL27B */
+ tmp = readl(SG_PINMON0);
+ clk_mode_axosel = tmp & SG_PINMON0_CLK_MODE_AXOSEL_MASK;
+
+ /* 25MHz or 6.25MHz is default for Pro4R, no need to set VPLLA/B */
+ if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ ||
+ clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_6250KHZ)
+ return;
+
+ /* Disable write protect of VPLL27ACTRL[2-7]*, VPLL27BCTRL[2-8] */
+ tmp = readl(SC_VPLL27ACTRL);
+ tmp |= 0x00000001;
+ writel(tmp, SC_VPLL27ACTRL);
+ tmp = readl(SC_VPLL27BCTRL);
+ tmp |= 0x00000001;
+ writel(tmp, SC_VPLL27BCTRL);
+
+ /* Unset VPLA_K_LD and VPLB_K_LD bit */
+ tmp = readl(SC_VPLL27ACTRL3);
+ tmp &= ~0x10000000;
+ writel(tmp, SC_VPLL27ACTRL3);
+ tmp = readl(SC_VPLL27BCTRL3);
+ tmp &= ~0x10000000;
+ writel(tmp, SC_VPLL27BCTRL3);
+
+ /* Set VPLA_M and VPLB_M to 0x20 */
+ tmp = readl(SC_VPLL27ACTRL2);
+ tmp &= ~0x0000007f;
+ tmp |= 0x00000020;
+ writel(tmp, SC_VPLL27ACTRL2);
+ tmp = readl(SC_VPLL27BCTRL2);
+ tmp &= ~0x0000007f;
+ tmp |= 0x00000020;
+ writel(tmp, SC_VPLL27BCTRL2);
+
+ if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ ||
+ clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_6250KHZ) {
+ /* Set VPLA_K and VPLB_K for AXO: 25MHz */
+ tmp = readl(SC_VPLL27ACTRL3);
+ tmp &= ~0x000fffff;
+ tmp |= 0x00066666;
+ writel(tmp, SC_VPLL27ACTRL3);
+ tmp = readl(SC_VPLL27BCTRL3);
+ tmp &= ~0x000fffff;
+ tmp |= 0x00066666;
+ writel(tmp, SC_VPLL27BCTRL3);
+ } else {
+ /* Set VPLA_K and VPLB_K for AXO: 24.576 MHz */
+ tmp = readl(SC_VPLL27ACTRL3);
+ tmp &= ~0x000fffff;
+ tmp |= 0x000f5800;
+ writel(tmp, SC_VPLL27ACTRL3);
+ tmp = readl(SC_VPLL27BCTRL3);
+ tmp &= ~0x000fffff;
+ tmp |= 0x000f5800;
+ writel(tmp, SC_VPLL27BCTRL3);
+ }
+
+ /* wait 1 usec */
+ udelay(1);
+
+ /* Set VPLA_K_LD and VPLB_K_LD to load K parameters */
+ tmp = readl(SC_VPLL27ACTRL3);
+ tmp |= 0x10000000;
+ writel(tmp, SC_VPLL27ACTRL3);
+ tmp = readl(SC_VPLL27BCTRL3);
+ tmp |= 0x10000000;
+ writel(tmp, SC_VPLL27BCTRL3);
+
+ /* Unset VPLA_SNRST and VPLB_SNRST bit */
+ tmp = readl(SC_VPLL27ACTRL2);
+ tmp |= 0x10000000;
+ writel(tmp, SC_VPLL27ACTRL2);
+ tmp = readl(SC_VPLL27BCTRL2);
+ tmp |= 0x10000000;
+ writel(tmp, SC_VPLL27BCTRL2);
+
+ /* Enable write protect of VPLL27ACTRL[2-7]*, VPLL27BCTRL[2-8] */
+ tmp = readl(SC_VPLL27ACTRL);
+ tmp &= ~0x00000001;
+ writel(tmp, SC_VPLL27ACTRL);
+ tmp = readl(SC_VPLL27BCTRL);
+ tmp &= ~0x00000001;
+ writel(tmp, SC_VPLL27BCTRL);
+}
+
+int ph1_pro4_pll_init(const struct uniphier_board_data *bd)
+{
+ int ret;
+
+ ret = dpll_init(bd->dram_freq);
+ if (ret)
+ return ret;
+ vpll_init();
+
+ /*
+ * Wait 500 usec until dpll get stable
+ * We wait 1 usec in vpll_init() so 1 usec can be saved here.
+ */
+ udelay(499);
+
+ return 0;
+}