From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001
From: James <>
Date: Wed, 4 Nov 2015 11:49:21 +0000
Subject: trunk-47381

---
 .../files/arch/arm/cpu/arm1136/nas782x/clock.c     | 97 ++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 package/boot/uboot-oxnas/files/arch/arm/cpu/arm1136/nas782x/clock.c

(limited to 'package/boot/uboot-oxnas/files/arch/arm/cpu/arm1136/nas782x/clock.c')

diff --git a/package/boot/uboot-oxnas/files/arch/arm/cpu/arm1136/nas782x/clock.c b/package/boot/uboot-oxnas/files/arch/arm/cpu/arm1136/nas782x/clock.c
new file mode 100644
index 0000000..8974ca0
--- /dev/null
+++ b/package/boot/uboot-oxnas/files/arch/arm/cpu/arm1136/nas782x/clock.c
@@ -0,0 +1,97 @@
+#include <common.h>
+#include <asm/arch/sysctl.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clock.h>
+
+typedef struct {
+	unsigned short mhz;
+	unsigned char refdiv;
+	unsigned char outdiv;
+	unsigned int fbdiv;
+	unsigned short bwadj;
+	unsigned short sfreq;
+	unsigned int sslope;
+} PLL_CONFIG;
+
+const PLL_CONFIG C_PLL_CONFIG[] = {
+	{ 500, 1, 2, 3932160, 119, 208, 189 }, //  500 MHz
+	{ 525, 2, 1, 4128768, 125, 139, 297 }, //  525 MHz
+	{ 550, 2, 1, 4325376, 131, 139, 311 }, //  550 MHz
+	{ 575, 2, 1, 4521984, 137, 139, 326 }, //  575 MHz
+	{ 600, 2, 1, 4718592, 143, 138, 339 }, //  600 MHz
+	{ 625, 1, 1, 3276800, 99, 208, 157 }, //  625 MHz
+	{ 650, 1, 1, 3407872, 103, 208, 164 }, //  650 MHz
+	{ 675, 1, 1, 3538944, 107, 208, 170 }, //  675 MHz
+	{ 700, 0, 0, 917504, 27, 416, 22 }, //  700 MHz
+	{ 725, 1, 1, 3801088, 115, 208, 182 }, //  725 MHz
+	{ 750, 0, 0, 983040, 29, 416, 23 }, //  750 MHz
+	{ 775, 3, 0, 4063232, 123, 104, 390 }, //  775 MHz
+	{ 800, 3, 0, 4194304, 127, 104, 403 }, //  800 MHz
+	{ 825, 3, 0, 4325376, 131, 104, 415 }, //  825 MHz
+	{ 850, 2, 0, 3342336, 101, 139, 241 }, //  850 MHz
+	{ 875, 2, 0, 3440640, 104, 139, 248 }, //  875 MHz
+	{ 900, 2, 0, 3538944, 107, 139, 255 }, //  900 MHz
+	{ 925, 2, 0, 3637248, 110, 139, 262 }, //  925 MHz
+	{ 950, 2, 0, 3735552, 113, 139, 269 }, //  950 MHz
+	{ 975, 2, 0, 3833856, 116, 139, 276 }, //  975 MHz
+	{ 1000, 2, 0, 3932160, 119, 139, 283 }, // 1000 MHz
+};
+
+#define PLL_BYPASS (1<<1)
+#define SAT_ENABLE (1<<3)
+
+#define PLL_OUTDIV_SHIFT	4
+#define PLL_REFDIV_SHIFT	8
+#define PLL_BWADJ_SHIFT		16
+
+#define PLL_LOW_FREQ	500
+#define PLL_FREQ_STEP	25
+static void plla_configure(int outdiv, int refdiv, int fbdiv, int bwadj,
+                           int sfreq, int sslope)
+{
+	setbits_le32(SYS_CTRL_PLLA_CTRL0, PLL_BYPASS);
+	udelay(10);
+	reset_block(SYS_CTRL_RST_PLLA, 1);
+	udelay(10);
+
+	writel((refdiv << PLL_REFDIV_SHIFT) | (outdiv << PLL_OUTDIV_SHIFT) |
+	       SAT_ENABLE | PLL_BYPASS,
+	       SYS_CTRL_PLLA_CTRL0);
+
+	writel(fbdiv, SYS_CTRL_PLLA_CTRL1);
+	writel((bwadj << PLL_BWADJ_SHIFT) | sfreq, SYS_CTRL_PLLA_CTRL2);
+	writel(sslope, SYS_CTRL_PLLA_CTRL3);
+
+	udelay(10); // 5us delay required (from TCI datasheet), use 10us
+
+	reset_block(SYS_CTRL_RST_PLLA, 0);
+
+	udelay(100); // Delay for PLL to lock
+
+	printf("  plla_ctrl0 : %08x\n", readl(SYS_CTRL_PLLA_CTRL0));
+	printf("  plla_ctrl1 : %08x\n", readl(SYS_CTRL_PLLA_CTRL1));
+	printf("  plla_ctrl2 : %08x\n", readl(SYS_CTRL_PLLA_CTRL2));
+	printf("  plla_ctrl3 : %08x\n", readl(SYS_CTRL_PLLA_CTRL3));
+
+	clrbits_le32(SYS_CTRL_PLLA_CTRL0, PLL_BYPASS); // Take PLL out of bypass
+	puts("\nPLLA Set\n");
+}
+
+int plla_set_config(int mhz)
+{
+	int index = (mhz - PLL_LOW_FREQ) / PLL_FREQ_STEP;
+	const PLL_CONFIG *cfg;
+
+	if (index < 0 || index > ARRAY_SIZE(C_PLL_CONFIG)) {
+		debug("Freq %d MHz out of range, default to lowest\n", mhz);
+		index = 0;
+	}
+	cfg = &C_PLL_CONFIG[index];
+
+	printf("Attempting to set PLLA to %d MHz ...\n", (unsigned) cfg->mhz);
+	plla_configure(cfg->outdiv, cfg->refdiv, cfg->fbdiv, cfg->bwadj,
+	               cfg->sfreq, cfg->sslope);
+
+	return cfg->mhz;
+}
+
-- 
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