Merge branch 'master' of git://git.denx.de/u-boot

Signed-off-by: Stefano Babic <sbabic@denx.de>

1 files changed, 234 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/am33xx/clock_am33xx.c b/arch/arm/mach-omap2/am33xx/clock_am33xx.c
new file mode 100644
index 0000000000..7b841b2d55
--- /dev/null
+++ b/arch/arm/mach-omap2/am33xx/clock_am33xx.c
@@ -0,0 +1,234 @@
+/*
+ * clock_am33xx.c
+ *
+ * clocks for AM33XX based boards
+ *
+ * Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/
+ *
+ * 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>
+
+#define OSC	(V_OSCK/1000000)
+
+struct cm_perpll *const cmper = (struct cm_perpll *)CM_PER;
+struct cm_wkuppll *const cmwkup = (struct cm_wkuppll *)CM_WKUP;
+struct cm_dpll *const cmdpll = (struct cm_dpll *)CM_DPLL;
+struct cm_rtc *const cmrtc = (struct cm_rtc *)CM_RTC;
+
+const struct dpll_regs dpll_mpu_regs = {
+	.cm_clkmode_dpll	= CM_WKUP + 0x88,
+	.cm_idlest_dpll		= CM_WKUP + 0x20,
+	.cm_clksel_dpll		= CM_WKUP + 0x2C,
+	.cm_div_m2_dpll		= CM_WKUP + 0xA8,
+};
+
+const struct dpll_regs dpll_core_regs = {
+	.cm_clkmode_dpll	= CM_WKUP + 0x90,
+	.cm_idlest_dpll		= CM_WKUP + 0x5C,
+	.cm_clksel_dpll		= CM_WKUP + 0x68,
+	.cm_div_m4_dpll		= CM_WKUP + 0x80,
+	.cm_div_m5_dpll		= CM_WKUP + 0x84,
+	.cm_div_m6_dpll		= CM_WKUP + 0xD8,
+};
+
+const struct dpll_regs dpll_per_regs = {
+	.cm_clkmode_dpll	= CM_WKUP + 0x8C,
+	.cm_idlest_dpll		= CM_WKUP + 0x70,
+	.cm_clksel_dpll		= CM_WKUP + 0x9C,
+	.cm_div_m2_dpll		= CM_WKUP + 0xAC,
+};
+
+const struct dpll_regs dpll_ddr_regs = {
+	.cm_clkmode_dpll	= CM_WKUP + 0x94,
+	.cm_idlest_dpll		= CM_WKUP + 0x34,
+	.cm_clksel_dpll		= CM_WKUP + 0x40,
+	.cm_div_m2_dpll		= CM_WKUP + 0xA0,
+};
+
+struct dpll_params dpll_mpu_opp100 = {
+		CONFIG_SYS_MPUCLK, OSC-1, 1, -1, -1, -1, -1};
+const struct dpll_params dpll_core_opp100 = {
+		1000, OSC-1, -1, -1, 10, 8, 4};
+const struct dpll_params dpll_mpu = {
+		MPUPLL_M_300, OSC-1, 1, -1, -1, -1, -1};
+const struct dpll_params dpll_core = {
+		50, OSC-1, -1, -1, 1, 1, 1};
+const struct dpll_params dpll_per = {
+		960, OSC-1, 5, -1, -1, -1, -1};
+
+const struct dpll_params *get_dpll_mpu_params(void)
+{
+	return &dpll_mpu;
+}
+
+const struct dpll_params *get_dpll_core_params(void)
+{
+	return &dpll_core;
+}
+
+const struct dpll_params *get_dpll_per_params(void)
+{
+	return &dpll_per;
+}
+
+void setup_clocks_for_console(void)
+{
+	clrsetbits_le32(&cmwkup->wkclkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
+			CD_CLKCTRL_CLKTRCTRL_SW_WKUP <<
+			CD_CLKCTRL_CLKTRCTRL_SHIFT);
+
+	clrsetbits_le32(&cmper->l4hsclkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
+			CD_CLKCTRL_CLKTRCTRL_SW_WKUP <<
+			CD_CLKCTRL_CLKTRCTRL_SHIFT);
+
+	clrsetbits_le32(&cmwkup->wkup_uart0ctrl,
+			MODULE_CLKCTRL_MODULEMODE_MASK,
+			MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+			MODULE_CLKCTRL_MODULEMODE_SHIFT);
+	clrsetbits_le32(&cmper->uart1clkctrl,
+			MODULE_CLKCTRL_MODULEMODE_MASK,
+			MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+			MODULE_CLKCTRL_MODULEMODE_SHIFT);
+	clrsetbits_le32(&cmper->uart2clkctrl,
+			MODULE_CLKCTRL_MODULEMODE_MASK,
+			MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+			MODULE_CLKCTRL_MODULEMODE_SHIFT);
+	clrsetbits_le32(&cmper->uart3clkctrl,
+			MODULE_CLKCTRL_MODULEMODE_MASK,
+			MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+			MODULE_CLKCTRL_MODULEMODE_SHIFT);
+	clrsetbits_le32(&cmper->uart4clkctrl,
+			MODULE_CLKCTRL_MODULEMODE_MASK,
+			MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+			MODULE_CLKCTRL_MODULEMODE_SHIFT);
+	clrsetbits_le32(&cmper->uart5clkctrl,
+			MODULE_CLKCTRL_MODULEMODE_MASK,
+			MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+			MODULE_CLKCTRL_MODULEMODE_SHIFT);
+}
+
+void enable_basic_clocks(void)
+{
+	u32 *const clk_domains[] = {
+		&cmper->l3clkstctrl,
+		&cmper->l4fwclkstctrl,
+		&cmper->l3sclkstctrl,
+		&cmper->l4lsclkstctrl,
+		&cmwkup->wkclkstctrl,
+		&cmper->emiffwclkctrl,
+		&cmrtc->clkstctrl,
+		0
+	};
+
+	u32 *const clk_modules_explicit_en[] = {
+		&cmper->l3clkctrl,
+		&cmper->l4lsclkctrl,
+		&cmper->l4fwclkctrl,
+		&cmwkup->wkl4wkclkctrl,
+		&cmper->l3instrclkctrl,
+		&cmper->l4hsclkctrl,
+		&cmwkup->wkgpio0clkctrl,
+		&cmwkup->wkctrlclkctrl,
+		&cmper->timer2clkctrl,
+		&cmper->gpmcclkctrl,
+		&cmper->elmclkctrl,
+		&cmper->mmc0clkctrl,
+		&cmper->mmc1clkctrl,
+		&cmwkup->wkup_i2c0ctrl,
+		&cmper->gpio1clkctrl,
+		&cmper->gpio2clkctrl,
+		&cmper->gpio3clkctrl,
+		&cmper->i2c1clkctrl,
+		&cmper->cpgmac0clkctrl,
+		&cmper->spi0clkctrl,
+		&cmrtc->rtcclkctrl,
+		&cmper->usb0clkctrl,
+		&cmper->emiffwclkctrl,
+		&cmper->emifclkctrl,
+		0
+	};
+
+	do_enable_clocks(clk_domains, clk_modules_explicit_en, 1);
+
+	/* Select the Master osc 24 MHZ as Timer2 clock source */
+	writel(0x1, &cmdpll->clktimer2clk);
+}
+
+/*
+ * Enable Spread Spectrum for the MPU by calculating the required
+ * values and setting the registers accordingly.
+ * @param permille The spreading in permille (10th of a percent)
+ */
+void set_mpu_spreadspectrum(int permille)
+{
+	u32 multiplier_m;
+	u32 predivider_n;
+	u32 cm_clksel_dpll_mpu;
+	u32 cm_clkmode_dpll_mpu;
+	u32 ref_clock;
+	u32 pll_bandwidth;
+	u32 mod_freq_divider;
+	u32 exponent;
+	u32 mantissa;
+	u32 delta_m_step;
+
+	printf("Enabling Spread Spectrum of %d permille for MPU\n",
+	       permille);
+
+	/* Read PLL parameter m and n */
+	cm_clksel_dpll_mpu = readl(&cmwkup->clkseldpllmpu);
+	multiplier_m = (cm_clksel_dpll_mpu >> 8) & 0x3FF;
+	predivider_n = cm_clksel_dpll_mpu & 0x7F;
+
+	/*
+	 * Calculate reference clock (clock after pre-divider),
+	 * its max. PLL bandwidth,
+	 * and resulting mod_freq_divider
+	 */
+	ref_clock = V_OSCK / (predivider_n + 1);
+	pll_bandwidth = ref_clock / 70;
+	mod_freq_divider = ref_clock / (4 * pll_bandwidth);
+
+	/* Calculate Mantissa/Exponent */
+	exponent = 0;
+	mantissa = mod_freq_divider;
+	while ((mantissa > 127) && (exponent < 7)) {
+		exponent++;
+		mantissa /= 2;
+	}
+	if (mantissa > 127)
+		mantissa = 127;
+
+	mod_freq_divider = mantissa << exponent;
+
+	/*
+	 * Calculate Modulation steps
+	 * As we use Downspread only, the spread is twice the value of
+	 * permille, so Div2!
+	 * As it takes the value in percent, divide by ten!
+	 */
+	delta_m_step = ((u32)((multiplier_m * permille) / 10 / 2)) << 18;
+	delta_m_step /= 100;
+	delta_m_step /= mod_freq_divider;
+	if (delta_m_step > 0xFFFFF)
+		delta_m_step = 0xFFFFF;
+
+	/* Setup Spread Spectrum */
+	writel(delta_m_step, &cmwkup->sscdeltamstepdllmpu);
+	writel((exponent << 8) | mantissa, &cmwkup->sscmodfreqdivdpllmpu);
+	cm_clkmode_dpll_mpu = readl(&cmwkup->clkmoddpllmpu);
+	/* clear all SSC flags */
+	cm_clkmode_dpll_mpu &= ~(0xF << CM_CLKMODE_DPLL_SSC_EN_SHIFT);
+	/* enable SSC with Downspread only */
+	cm_clkmode_dpll_mpu |=  CM_CLKMODE_DPLL_SSC_EN_MASK |
+				CM_CLKMODE_DPLL_SSC_DOWNSPREAD_MASK;
+	writel(cm_clkmode_dpll_mpu, &cmwkup->clkmoddpllmpu);
+	while (!(readl(&cmwkup->clkmoddpllmpu) & 0x2000))
+		;
+}