1 files changed, 272 insertions, 0 deletions
diff --git a/arch/arm/mach-keystone/clock.c b/arch/arm/mach-keystone/clock.c
new file mode 100644
index 0000000000..d13fbc1a4b
--- /dev/null
+++ b/arch/arm/mach-keystone/clock.c
@@ -0,0 +1,272 @@
+/*
+ * Keystone2: pll initialization
+ *
+ * (C) Copyright 2012-2014
+ *     Texas Instruments Incorporated, <www.ti.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/clock_defs.h>
+
+#define MAX_SPEEDS		13
+
+static void wait_for_completion(const struct pll_init_data *data)
+{
+	int i;
+	for (i = 0; i < 100; i++) {
+		sdelay(450);
+		if ((pllctl_reg_read(data->pll, stat) & PLLSTAT_GO) == 0)
+			break;
+	}
+}
+
+void init_pll(const struct pll_init_data *data)
+{
+	u32 tmp, tmp_ctl, pllm, plld, pllod, bwadj;
+
+	pllm = data->pll_m - 1;
+	plld = (data->pll_d - 1) & PLL_DIV_MASK;
+	pllod = (data->pll_od - 1) & PLL_CLKOD_MASK;
+
+	if (data->pll == MAIN_PLL) {
+		/* The requered delay before main PLL configuration */
+		sdelay(210000);
+
+		tmp = pllctl_reg_read(data->pll, secctl);
+
+		if (tmp & (PLLCTL_BYPASS)) {
+			setbits_le32(keystone_pll_regs[data->pll].reg1,
+				     BIT(MAIN_ENSAT_OFFSET));
+
+			pllctl_reg_clrbits(data->pll, ctl, PLLCTL_PLLEN |
+					   PLLCTL_PLLENSRC);
+			sdelay(340);
+
+			pllctl_reg_setbits(data->pll, secctl, PLLCTL_BYPASS);
+			pllctl_reg_setbits(data->pll, ctl, PLLCTL_PLLPWRDN);
+			sdelay(21000);
+
+			pllctl_reg_clrbits(data->pll, ctl, PLLCTL_PLLPWRDN);
+		} else {
+			pllctl_reg_clrbits(data->pll, ctl, PLLCTL_PLLEN |
+					   PLLCTL_PLLENSRC);
+			sdelay(340);
+		}
+
+		pllctl_reg_write(data->pll, mult, pllm & PLLM_MULT_LO_MASK);
+
+		clrsetbits_le32(keystone_pll_regs[data->pll].reg0,
+				PLLM_MULT_HI_SMASK, (pllm << 6));
+
+		/* Set the BWADJ     (12 bit field)  */
+		tmp_ctl = pllm >> 1; /* Divide the pllm by 2 */
+		clrsetbits_le32(keystone_pll_regs[data->pll].reg0,
+				PLL_BWADJ_LO_SMASK,
+				(tmp_ctl << PLL_BWADJ_LO_SHIFT));
+		clrsetbits_le32(keystone_pll_regs[data->pll].reg1,
+				PLL_BWADJ_HI_MASK,
+				(tmp_ctl >> 8));
+
+		/*
+		 * Set the pll divider (6 bit field) *
+		 * PLLD[5:0] is located in MAINPLLCTL0
+		 */
+		clrsetbits_le32(keystone_pll_regs[data->pll].reg0,
+				PLL_DIV_MASK, plld);
+
+		/* Set the OUTPUT DIVIDE (4 bit field) in SECCTL */
+		pllctl_reg_rmw(data->pll, secctl, PLL_CLKOD_SMASK,
+			       (pllod << PLL_CLKOD_SHIFT));
+		wait_for_completion(data);
+
+		pllctl_reg_write(data->pll, div1, PLLM_RATIO_DIV1);
+		pllctl_reg_write(data->pll, div2, PLLM_RATIO_DIV2);
+		pllctl_reg_write(data->pll, div3, PLLM_RATIO_DIV3);
+		pllctl_reg_write(data->pll, div4, PLLM_RATIO_DIV4);
+		pllctl_reg_write(data->pll, div5, PLLM_RATIO_DIV5);
+
+		pllctl_reg_setbits(data->pll, alnctl, 0x1f);
+
+		/*
+		 * Set GOSET bit in PLLCMD to initiate the GO operation
+		 * to change the divide
+		 */
+		pllctl_reg_setbits(data->pll, cmd, PLLSTAT_GO);
+		sdelay(1500); /* wait for the phase adj */
+		wait_for_completion(data);
+
+		/* Reset PLL */
+		pllctl_reg_setbits(data->pll, ctl, PLLCTL_PLLRST);
+		sdelay(21000);	/* Wait for a minimum of 7 us*/
+		pllctl_reg_clrbits(data->pll, ctl, PLLCTL_PLLRST);
+		sdelay(105000);	/* Wait for PLL Lock time (min 50 us) */
+
+		pllctl_reg_clrbits(data->pll, secctl, PLLCTL_BYPASS);
+
+		tmp = pllctl_reg_setbits(data->pll, ctl, PLLCTL_PLLEN);
+
+#ifndef CONFIG_SOC_K2E
+	} else if (data->pll == TETRIS_PLL) {
+		bwadj = pllm >> 1;
+		/* 1.5 Set PLLCTL0[BYPASS] =1 (enable bypass), */
+		setbits_le32(keystone_pll_regs[data->pll].reg0,  PLLCTL_BYPASS);
+		/*
+		 * Set CHIPMISCCTL1[13] = 0 (enable glitchfree bypass)
+		 * only applicable for Kepler
+		 */
+		clrbits_le32(KS2_MISC_CTRL, KS2_ARM_PLL_EN);
+		/* 2 In PLLCTL1, write PLLRST = 1 (PLL is reset) */
+		setbits_le32(keystone_pll_regs[data->pll].reg1 ,
+			     PLL_PLLRST | PLLCTL_ENSAT);
+
+		/*
+		 * 3 Program PLLM and PLLD in PLLCTL0 register
+		 * 4 Program BWADJ[7:0] in PLLCTL0 and BWADJ[11:8] in
+		 * PLLCTL1 register. BWADJ value must be set
+		 * to ((PLLM + 1) >> 1) – 1)
+		 */
+		tmp = ((bwadj & PLL_BWADJ_LO_MASK) << PLL_BWADJ_LO_SHIFT) |
+			(pllm << 6) |
+			(plld & PLL_DIV_MASK) |
+			(pllod << PLL_CLKOD_SHIFT) | PLLCTL_BYPASS;
+		__raw_writel(tmp, keystone_pll_regs[data->pll].reg0);
+
+		/* Set BWADJ[11:8] bits */
+		tmp = __raw_readl(keystone_pll_regs[data->pll].reg1);
+		tmp &= ~(PLL_BWADJ_HI_MASK);
+		tmp |= ((bwadj>>8) & PLL_BWADJ_HI_MASK);
+		__raw_writel(tmp, keystone_pll_regs[data->pll].reg1);
+		/*
+		 * 5 Wait for at least 5 us based on the reference
+		 * clock (PLL reset time)
+		 */
+		sdelay(21000);	/* Wait for a minimum of 7 us*/
+
+		/* 6 In PLLCTL1, write PLLRST = 0 (PLL reset is released) */
+		clrbits_le32(keystone_pll_regs[data->pll].reg1, PLL_PLLRST);
+		/*
+		 * 7 Wait for at least 500 * REFCLK cycles * (PLLD + 1)
+		 * (PLL lock time)
+		 */
+		sdelay(105000);
+		/* 8 disable bypass */
+		clrbits_le32(keystone_pll_regs[data->pll].reg0, PLLCTL_BYPASS);
+		/*
+		 * 9 Set CHIPMISCCTL1[13] = 1 (disable glitchfree bypass)
+		 * only applicable for Kepler
+		 */
+		setbits_le32(KS2_MISC_CTRL, KS2_ARM_PLL_EN);
+#endif
+	} else {
+		setbits_le32(keystone_pll_regs[data->pll].reg1, PLLCTL_ENSAT);
+		/*
+		 * process keeps state of Bypass bit while programming
+		 * all other DDR PLL settings
+		 */
+		tmp = __raw_readl(keystone_pll_regs[data->pll].reg0);
+		tmp &= PLLCTL_BYPASS;	/* clear everything except Bypass */
+
+		/*
+		 * Set the BWADJ[7:0], PLLD[5:0] and PLLM to PLLCTL0,
+		 * bypass disabled
+		 */
+		bwadj = pllm >> 1;
+		tmp |= ((bwadj & PLL_BWADJ_LO_MASK) << PLL_BWADJ_LO_SHIFT) |
+			(pllm << PLL_MULT_SHIFT) |
+			(plld & PLL_DIV_MASK) |
+			(pllod << PLL_CLKOD_SHIFT);
+		__raw_writel(tmp, keystone_pll_regs[data->pll].reg0);
+
+		/* Set BWADJ[11:8] bits */
+		tmp = __raw_readl(keystone_pll_regs[data->pll].reg1);
+		tmp &= ~(PLL_BWADJ_HI_MASK);
+		tmp |= ((bwadj >> 8) & PLL_BWADJ_HI_MASK);
+
+		__raw_writel(tmp, keystone_pll_regs[data->pll].reg1);
+
+		/* Reset bit: bit 14 for both DDR3 & PASS PLL */
+		tmp = PLL_PLLRST;
+		/* Set RESET bit = 1 */
+		setbits_le32(keystone_pll_regs[data->pll].reg1, tmp);
+		/* Wait for a minimum of 7 us*/
+		sdelay(21000);
+		/* Clear RESET bit */
+		clrbits_le32(keystone_pll_regs[data->pll].reg1, tmp);
+		sdelay(105000);
+
+		/* clear BYPASS (Enable PLL Mode) */
+		clrbits_le32(keystone_pll_regs[data->pll].reg0, PLLCTL_BYPASS);
+		sdelay(21000);	/* Wait for a minimum of 7 us*/
+	}
+
+	/*
+	 * This is required to provide a delay between multiple
+	 * consequent PPL configurations
+	 */
+	sdelay(210000);
+}
+
+void init_plls(int num_pll, struct pll_init_data *config)
+{
+	int i;
+
+	for (i = 0; i < num_pll; i++)
+		init_pll(&config[i]);
+}
+
+static int get_max_speed(u32 val, int *speeds)
+{
+	int j;
+
+	if (!val)
+		return speeds[0];
+
+	for (j = 1; j < MAX_SPEEDS; j++) {
+		if (val == 1)
+			return speeds[j];
+		val >>= 1;
+	}
+
+	return SPD800;
+}
+
+#ifdef CONFIG_SOC_K2HK
+static u32 read_efuse_bootrom(void)
+{
+	return (cpu_revision() > 1) ? __raw_readl(KS2_EFUSE_BOOTROM) :
+		__raw_readl(KS2_REV1_DEVSPEED);
+}
+#else
+static inline u32 read_efuse_bootrom(void)
+{
+	return __raw_readl(KS2_EFUSE_BOOTROM);
+}
+#endif
+
+inline int get_max_dev_speed(void)
+{
+	return get_max_speed(read_efuse_bootrom() & 0xffff, dev_speeds);
+}
+
+#ifndef CONFIG_SOC_K2E
+inline int get_max_arm_speed(void)
+{
+	return get_max_speed((read_efuse_bootrom() >> 16) & 0xffff, arm_speeds);
+}
+#endif
+
+void pass_pll_pa_clk_enable(void)
+{
+	u32 reg;
+
+	reg = readl(keystone_pll_regs[PASS_PLL].reg1);
+
+	reg |= PLLCTL_PAPLL;
+	writel(reg, keystone_pll_regs[PASS_PLL].reg1);
+
+	/* wait till clock is enabled */
+	sdelay(15000);
+}