1 files changed, 410 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/am33xx/clock_ti814x.c b/arch/arm/mach-omap2/am33xx/clock_ti814x.c
new file mode 100644
index 0000000000..50bd631cf6
--- /dev/null
+++ b/arch/arm/mach-omap2/am33xx/clock_ti814x.c
@@ -0,0 +1,410 @@
+/*
+ * clock_ti814x.c
+ *
+ * Clocks for TI814X based boards
+ *
+ * Copyright (C) 2013, Texas Instruments, Incorporated
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/hardware.h>
+#include <asm/io.h>
+
+/* PRCM */
+#define PRCM_MOD_EN		0x2
+
+/* CLK_SRC */
+#define OSC_SRC0		0
+#define OSC_SRC1		1
+
+#define L3_OSC_SRC		OSC_SRC0
+
+#define OSC_0_FREQ		20
+
+#define DCO_HS2_MIN		500
+#define DCO_HS2_MAX		1000
+#define DCO_HS1_MIN		1000
+#define DCO_HS1_MAX		2000
+
+#define SELFREQDCO_HS2		0x00000801
+#define SELFREQDCO_HS1		0x00001001
+
+#define MPU_N			0x1
+#define MPU_M			0x3C
+#define MPU_M2			1
+#define MPU_CLKCTRL		0x1
+
+#define L3_N			19
+#define L3_M			880
+#define L3_M2			4
+#define L3_CLKCTRL		0x801
+
+#define DDR_N			19
+#define DDR_M			666
+#define DDR_M2			2
+#define DDR_CLKCTRL		0x801
+
+/* ADPLLJ register values */
+#define ADPLLJ_CLKCTRL_HS2	0x00000801 /* HS2 mode, TINT2 = 1 */
+#define ADPLLJ_CLKCTRL_HS1	0x00001001 /* HS1 mode, TINT2 = 1 */
+#define ADPLLJ_CLKCTRL_CLKDCOLDOEN	(1 << 29)
+#define ADPLLJ_CLKCTRL_IDLE		(1 << 23)
+#define ADPLLJ_CLKCTRL_CLKOUTEN		(1 << 20)
+#define ADPLLJ_CLKCTRL_CLKOUTLDOEN	(1 << 19)
+#define ADPLLJ_CLKCTRL_CLKDCOLDOPWDNZ	(1 << 17)
+#define ADPLLJ_CLKCTRL_LPMODE		(1 << 12)
+#define ADPLLJ_CLKCTRL_DRIFTGUARDIAN	(1 << 11)
+#define ADPLLJ_CLKCTRL_REGM4XEN		(1 << 10)
+#define ADPLLJ_CLKCTRL_TINITZ		(1 << 0)
+#define ADPLLJ_CLKCTRL_CLKDCO		(ADPLLJ_CLKCTRL_CLKDCOLDOEN | \
+					 ADPLLJ_CLKCTRL_CLKOUTEN | \
+					 ADPLLJ_CLKCTRL_CLKOUTLDOEN | \
+					 ADPLLJ_CLKCTRL_CLKDCOLDOPWDNZ)
+
+#define ADPLLJ_STATUS_PHASELOCK		(1 << 10)
+#define ADPLLJ_STATUS_FREQLOCK		(1 << 9)
+#define ADPLLJ_STATUS_PHSFRQLOCK	(ADPLLJ_STATUS_PHASELOCK | \
+					 ADPLLJ_STATUS_FREQLOCK)
+#define ADPLLJ_STATUS_BYPASSACK		(1 << 8)
+#define ADPLLJ_STATUS_BYPASS		(1 << 0)
+#define ADPLLJ_STATUS_BYPASSANDACK	(ADPLLJ_STATUS_BYPASSACK | \
+					 ADPLLJ_STATUS_BYPASS)
+
+#define ADPLLJ_TENABLE_ENB		(1 << 0)
+#define ADPLLJ_TENABLEDIV_ENB		(1 << 0)
+
+#define ADPLLJ_M2NDIV_M2SHIFT		16
+
+#define MPU_PLL_BASE			(PLL_SUBSYS_BASE + 0x048)
+#define L3_PLL_BASE			(PLL_SUBSYS_BASE + 0x110)
+#define DDR_PLL_BASE			(PLL_SUBSYS_BASE + 0x290)
+
+struct ad_pll {
+	unsigned int pwrctrl;
+	unsigned int clkctrl;
+	unsigned int tenable;
+	unsigned int tenablediv;
+	unsigned int m2ndiv;
+	unsigned int mn2div;
+	unsigned int fracdiv;
+	unsigned int bwctrl;
+	unsigned int fracctrl;
+	unsigned int status;
+	unsigned int m3div;
+	unsigned int rampctrl;
+};
+
+#define OSC_SRC_CTRL			(PLL_SUBSYS_BASE + 0x2C0)
+
+#define ENET_CLKCTRL_CMPL		0x30000
+
+#define SATA_PLL_BASE			(CTRL_BASE + 0x0720)
+
+struct sata_pll {
+	unsigned int pllcfg0;
+	unsigned int pllcfg1;
+	unsigned int pllcfg2;
+	unsigned int pllcfg3;
+	unsigned int pllcfg4;
+	unsigned int pllstatus;
+	unsigned int rxstatus;
+	unsigned int txstatus;
+	unsigned int testcfg;
+};
+
+#define SEL_IN_FREQ		(0x1 << 31)
+#define DIGCLRZ			(0x1 << 30)
+#define ENDIGLDO		(0x1 << 4)
+#define APLL_CP_CURR		(0x1 << 3)
+#define ENBGSC_REF		(0x1 << 2)
+#define ENPLLLDO		(0x1 << 1)
+#define ENPLL			(0x1 << 0)
+
+#define SATA_PLLCFG0_1 (SEL_IN_FREQ | ENBGSC_REF)
+#define SATA_PLLCFG0_2 (SEL_IN_FREQ | ENDIGLDO | ENBGSC_REF)
+#define SATA_PLLCFG0_3 (SEL_IN_FREQ | ENDIGLDO | ENBGSC_REF | ENPLLLDO)
+#define SATA_PLLCFG0_4 (SEL_IN_FREQ | DIGCLRZ | ENDIGLDO | ENBGSC_REF | \
+			ENPLLLDO | ENPLL)
+
+#define PLL_LOCK		(0x1 << 0)
+
+#define ENSATAMODE		(0x1 << 31)
+#define PLLREFSEL		(0x1 << 30)
+#define MDIVINT			(0x4b << 18)
+#define EN_CLKAUX		(0x1 << 5)
+#define EN_CLK125M		(0x1 << 4)
+#define EN_CLK100M		(0x1 << 3)
+#define EN_CLK50M		(0x1 << 2)
+
+#define SATA_PLLCFG1 (ENSATAMODE |	\
+		      PLLREFSEL |	\
+		      MDIVINT |		\
+		      EN_CLKAUX |	\
+		      EN_CLK125M |	\
+		      EN_CLK100M |	\
+		      EN_CLK50M)
+
+#define DIGLDO_EN_CAPLESSMODE	(0x1 << 22)
+#define PLLDO_EN_LDO_STABLE	(0x1 << 11)
+#define PLLDO_EN_BUF_CUR	(0x1 << 7)
+#define PLLDO_EN_LP		(0x1 << 6)
+#define PLLDO_CTRL_TRIM_1_4V	(0x10 << 1)
+
+#define SATA_PLLCFG3 (DIGLDO_EN_CAPLESSMODE |	\
+		      PLLDO_EN_LDO_STABLE |	\
+		      PLLDO_EN_BUF_CUR |	\
+		      PLLDO_EN_LP |		\
+		      PLLDO_CTRL_TRIM_1_4V)
+
+const struct cm_alwon *cmalwon = (struct cm_alwon *)CM_ALWON_BASE;
+const struct cm_def *cmdef = (struct cm_def *)CM_DEFAULT_BASE;
+const struct sata_pll *spll = (struct sata_pll *)SATA_PLL_BASE;
+
+/*
+ * Enable the peripheral clock for required peripherals
+ */
+static void enable_per_clocks(void)
+{
+	/* HSMMC1 */
+	writel(PRCM_MOD_EN, &cmalwon->mmchs1clkctrl);
+	while (readl(&cmalwon->mmchs1clkctrl) != PRCM_MOD_EN)
+		;
+
+	/* Ethernet */
+	writel(PRCM_MOD_EN, &cmalwon->ethclkstctrl);
+	writel(PRCM_MOD_EN, &cmalwon->ethernet0clkctrl);
+	while ((readl(&cmalwon->ethernet0clkctrl) & ENET_CLKCTRL_CMPL) != 0)
+		;
+	writel(PRCM_MOD_EN, &cmalwon->ethernet1clkctrl);
+	while ((readl(&cmalwon->ethernet1clkctrl) & ENET_CLKCTRL_CMPL) != 0)
+		;
+
+	/* RTC clocks */
+	writel(PRCM_MOD_EN, &cmalwon->rtcclkstctrl);
+	writel(PRCM_MOD_EN, &cmalwon->rtcclkctrl);
+	while (readl(&cmalwon->rtcclkctrl) != PRCM_MOD_EN)
+		;
+}
+
+/*
+ * select the HS1 or HS2 for DCO Freq
+ * return : CLKCTRL
+ */
+static u32 pll_dco_freq_sel(u32 clkout_dco)
+{
+	if (clkout_dco >= DCO_HS2_MIN && clkout_dco < DCO_HS2_MAX)
+		return SELFREQDCO_HS2;
+	else if (clkout_dco >= DCO_HS1_MIN && clkout_dco < DCO_HS1_MAX)
+		return SELFREQDCO_HS1;
+	else
+		return -1;
+}
+
+/*
+ * select the sigma delta config
+ * return: sigma delta val
+ */
+static u32 pll_sigma_delta_val(u32 clkout_dco)
+{
+	u32 sig_val = 0;
+
+	sig_val = (clkout_dco + 225) / 250;
+	sig_val = sig_val << 24;
+
+	return sig_val;
+}
+
+/*
+ * configure individual ADPLLJ
+ */
+static void pll_config(u32 base, u32 n, u32 m, u32 m2,
+		       u32 clkctrl_val, int adpllj)
+{
+	const struct ad_pll *adpll = (struct ad_pll *)base;
+	u32 m2nval, mn2val, read_clkctrl = 0, clkout_dco = 0;
+	u32 sig_val = 0, hs_mod = 0;
+
+	m2nval = (m2 << ADPLLJ_M2NDIV_M2SHIFT) | n;
+	mn2val = m;
+
+	/* calculate clkout_dco */
+	clkout_dco = ((OSC_0_FREQ / (n+1)) * m);
+
+	/* sigma delta & Hs mode selection skip for ADPLLS*/
+	if (adpllj) {
+		sig_val = pll_sigma_delta_val(clkout_dco);
+		hs_mod = pll_dco_freq_sel(clkout_dco);
+	}
+
+	/* by-pass pll */
+	read_clkctrl = readl(&adpll->clkctrl);
+	writel((read_clkctrl | ADPLLJ_CLKCTRL_IDLE), &adpll->clkctrl);
+	while ((readl(&adpll->status) & ADPLLJ_STATUS_BYPASSANDACK)
+		!= ADPLLJ_STATUS_BYPASSANDACK)
+		;
+
+	/* clear TINITZ */
+	read_clkctrl = readl(&adpll->clkctrl);
+	writel((read_clkctrl & ~ADPLLJ_CLKCTRL_TINITZ), &adpll->clkctrl);
+
+	/*
+	 * ref_clk = 20/(n + 1);
+	 * clkout_dco = ref_clk * m;
+	 * clk_out = clkout_dco/m2;
+	*/
+	read_clkctrl = readl(&adpll->clkctrl) &
+			     ~(ADPLLJ_CLKCTRL_LPMODE |
+			     ADPLLJ_CLKCTRL_DRIFTGUARDIAN |
+			     ADPLLJ_CLKCTRL_REGM4XEN);
+	writel(m2nval, &adpll->m2ndiv);
+	writel(mn2val, &adpll->mn2div);
+
+	/* Skip for modena(ADPLLS) */
+	if (adpllj) {
+		writel(sig_val, &adpll->fracdiv);
+		writel((read_clkctrl | hs_mod), &adpll->clkctrl);
+	}
+
+	/* Load M2, N2 dividers of ADPLL */
+	writel(ADPLLJ_TENABLEDIV_ENB, &adpll->tenablediv);
+	writel(~ADPLLJ_TENABLEDIV_ENB, &adpll->tenablediv);
+
+	/* Load M, N dividers of ADPLL */
+	writel(ADPLLJ_TENABLE_ENB, &adpll->tenable);
+	writel(~ADPLLJ_TENABLE_ENB, &adpll->tenable);
+
+	/* Configure CLKDCOLDOEN,CLKOUTLDOEN,CLKOUT Enable BITS */
+	read_clkctrl = readl(&adpll->clkctrl) & ~ADPLLJ_CLKCTRL_CLKDCO;
+	if (adpllj)
+		writel((read_clkctrl | ADPLLJ_CLKCTRL_CLKDCO),
+						&adpll->clkctrl);
+
+	/* Enable TINTZ and disable IDLE(PLL in Active & Locked Mode */
+	read_clkctrl = readl(&adpll->clkctrl) & ~ADPLLJ_CLKCTRL_IDLE;
+	writel((read_clkctrl | ADPLLJ_CLKCTRL_TINITZ), &adpll->clkctrl);
+
+	/* Wait for phase and freq lock */
+	while ((readl(&adpll->status) & ADPLLJ_STATUS_PHSFRQLOCK) !=
+	       ADPLLJ_STATUS_PHSFRQLOCK)
+		;
+}
+
+static void unlock_pll_control_mmr(void)
+{
+	/* TRM 2.10.1.4 and 3.2.7-3.2.11 */
+	writel(0x1EDA4C3D, 0x481C5040);
+	writel(0x2FF1AC2B, 0x48140060);
+	writel(0xF757FDC0, 0x48140064);
+	writel(0xE2BC3A6D, 0x48140068);
+	writel(0x1EBF131D, 0x4814006c);
+	writel(0x6F361E05, 0x48140070);
+}
+
+static void mpu_pll_config(void)
+{
+	pll_config(MPU_PLL_BASE, MPU_N, MPU_M, MPU_M2, MPU_CLKCTRL, 0);
+}
+
+static void l3_pll_config(void)
+{
+	u32 l3_osc_src, rd_osc_src = 0;
+
+	l3_osc_src = L3_OSC_SRC;
+	rd_osc_src = readl(OSC_SRC_CTRL);
+
+	if (OSC_SRC0 == l3_osc_src)
+		writel((rd_osc_src & 0xfffffffe)|0x0, OSC_SRC_CTRL);
+	else
+		writel((rd_osc_src & 0xfffffffe)|0x1, OSC_SRC_CTRL);
+
+	pll_config(L3_PLL_BASE, L3_N, L3_M, L3_M2, L3_CLKCTRL, 1);
+}
+
+void ddr_pll_config(unsigned int ddrpll_m)
+{
+	pll_config(DDR_PLL_BASE, DDR_N, DDR_M, DDR_M2, DDR_CLKCTRL, 1);
+}
+
+void sata_pll_config(void)
+{
+	/*
+	 * This sequence for configuring the SATA PLL
+	 * resident in the control module is documented
+	 * in TI8148 TRM section 21.3.1
+	 */
+	writel(SATA_PLLCFG1, &spll->pllcfg1);
+	udelay(50);
+
+	writel(SATA_PLLCFG3, &spll->pllcfg3);
+	udelay(50);
+
+	writel(SATA_PLLCFG0_1, &spll->pllcfg0);
+	udelay(50);
+
+	writel(SATA_PLLCFG0_2, &spll->pllcfg0);
+	udelay(50);
+
+	writel(SATA_PLLCFG0_3, &spll->pllcfg0);
+	udelay(50);
+
+	writel(SATA_PLLCFG0_4, &spll->pllcfg0);
+	udelay(50);
+
+	while (((readl(&spll->pllstatus) & PLL_LOCK) == 0))
+		;
+}
+
+void enable_dmm_clocks(void)
+{
+	writel(PRCM_MOD_EN, &cmdef->fwclkctrl);
+	writel(PRCM_MOD_EN, &cmdef->l3fastclkstctrl);
+	writel(PRCM_MOD_EN, &cmdef->emif0clkctrl);
+	while ((readl(&cmdef->emif0clkctrl)) != PRCM_MOD_EN)
+		;
+	writel(PRCM_MOD_EN, &cmdef->emif1clkctrl);
+	while ((readl(&cmdef->emif1clkctrl)) != PRCM_MOD_EN)
+		;
+	while ((readl(&cmdef->l3fastclkstctrl) & 0x300) != 0x300)
+		;
+	writel(PRCM_MOD_EN, &cmdef->dmmclkctrl);
+	while ((readl(&cmdef->dmmclkctrl)) != PRCM_MOD_EN)
+		;
+	writel(PRCM_MOD_EN, &cmalwon->l3slowclkstctrl);
+	while ((readl(&cmalwon->l3slowclkstctrl) & 0x2100) != 0x2100)
+		;
+}
+
+void setup_clocks_for_console(void)
+{
+	unlock_pll_control_mmr();
+	/* UART0 */
+	writel(PRCM_MOD_EN, &cmalwon->uart0clkctrl);
+	while (readl(&cmalwon->uart0clkctrl) != PRCM_MOD_EN)
+		;
+}
+
+void setup_early_clocks(void)
+{
+	setup_clocks_for_console();
+}
+
+/*
+ * Configure the PLL/PRCM for necessary peripherals
+ */
+void prcm_init(void)
+{
+	/* Enable the control module */
+	writel(PRCM_MOD_EN, &cmalwon->controlclkctrl);
+
+	/* Configure PLLs */
+	mpu_pll_config();
+	l3_pll_config();
+	sata_pll_config();
+
+	/* Enable the required peripherals */
+	enable_per_clocks();
+}