--- /dev/null
+/*
+ * clock_ti816x.c
+ *
+ * Clocks for TI816X based boards
+ *
+ * Copyright (C) 2013, Adeneo Embedded <www.adeneo-embedded.com>
+ * Antoine Tenart, <atenart@adeneo-embedded.com>
+ *
+ * Based on TI-PSP-04.00.02.14 :
+ *
+ * Copyright (C) 2009, Texas Instruments, Incorporated
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <common.h>
+#include <asm/arch/ddr_defs.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/hardware.h>
+#include <asm/io.h>
+
+#include <asm/emif.h>
+
+#define CM_PLL_BASE (CTRL_BASE + 0x0400)
+
+/* Main PLL */
+#define MAIN_N 64
+#define MAIN_P 0x1
+#define MAIN_INTFREQ1 0x8
+#define MAIN_FRACFREQ1 0x800000
+#define MAIN_MDIV1 0x2
+#define MAIN_INTFREQ2 0xE
+#define MAIN_FRACFREQ2 0x0
+#define MAIN_MDIV2 0x1
+#define MAIN_INTFREQ3 0x8
+#define MAIN_FRACFREQ3 0xAAAAB0
+#define MAIN_MDIV3 0x3
+#define MAIN_INTFREQ4 0x9
+#define MAIN_FRACFREQ4 0x55554F
+#define MAIN_MDIV4 0x3
+#define MAIN_INTFREQ5 0x9
+#define MAIN_FRACFREQ5 0x374BC6
+#define MAIN_MDIV5 0xC
+#define MAIN_MDIV6 0x48
+#define MAIN_MDIV7 0x4
+
+/* DDR PLL */
+#if defined(CONFIG_TI816X_DDR_PLL_400) /* 400 MHz */
+#define DDR_N 59
+#define DDR_P 0x1
+#define DDR_MDIV1 0x4
+#define DDR_INTFREQ2 0x8
+#define DDR_FRACFREQ2 0xD99999
+#define DDR_MDIV2 0x1E
+#define DDR_INTFREQ3 0x8
+#define DDR_FRACFREQ3 0x0
+#define DDR_MDIV3 0x4
+#define DDR_INTFREQ4 0xE /* Expansion DDR clk */
+#define DDR_FRACFREQ4 0x0
+#define DDR_MDIV4 0x4
+#define DDR_INTFREQ5 0xE /* Expansion DDR clk */
+#define DDR_FRACFREQ5 0x0
+#define DDR_MDIV5 0x4
+#elif defined(CONFIG_TI816X_DDR_PLL_531) /* 531 MHz */
+#define DDR_N 59
+#define DDR_P 0x1
+#define DDR_MDIV1 0x3
+#define DDR_INTFREQ2 0x8
+#define DDR_FRACFREQ2 0xD99999
+#define DDR_MDIV2 0x1E
+#define DDR_INTFREQ3 0x8
+#define DDR_FRACFREQ3 0x0
+#define DDR_MDIV3 0x4
+#define DDR_INTFREQ4 0xE /* Expansion DDR clk */
+#define DDR_FRACFREQ4 0x0
+#define DDR_MDIV4 0x4
+#define DDR_INTFREQ5 0xE /* Expansion DDR clk */
+#define DDR_FRACFREQ5 0x0
+#define DDR_MDIV5 0x4
+#elif defined(CONFIG_TI816X_DDR_PLL_675) /* 675 MHz */
+#define DDR_N 50
+#define DDR_P 0x1
+#define DDR_MDIV1 0x2
+#define DDR_INTFREQ2 0x9
+#define DDR_FRACFREQ2 0x0
+#define DDR_MDIV2 0x19
+#define DDR_INTFREQ3 0x13
+#define DDR_FRACFREQ3 0x800000
+#define DDR_MDIV3 0x2
+#define DDR_INTFREQ4 0xE /* Expansion DDR clk */
+#define DDR_FRACFREQ4 0x0
+#define DDR_MDIV4 0x4
+#define DDR_INTFREQ5 0xE /* Expansion DDR clk */
+#define DDR_FRACFREQ5 0x0
+#define DDR_MDIV5 0x4
+#elif defined(CONFIG_TI816X_DDR_PLL_796) /* 796 MHz */
+#define DDR_N 59
+#define DDR_P 0x1
+#define DDR_MDIV1 0x2
+#define DDR_INTFREQ2 0x8
+#define DDR_FRACFREQ2 0xD99999
+#define DDR_MDIV2 0x1E
+#define DDR_INTFREQ3 0x8
+#define DDR_FRACFREQ3 0x0
+#define DDR_MDIV3 0x4
+#define DDR_INTFREQ4 0xE /* Expansion DDR clk */
+#define DDR_FRACFREQ4 0x0
+#define DDR_MDIV4 0x4
+#define DDR_INTFREQ5 0xE /* Expansion DDR clk */
+#define DDR_FRACFREQ5 0x0
+#define DDR_MDIV5 0x4
+#endif
+
+#define CONTROL_STATUS (CTRL_BASE + 0x40)
+#define DDR_RCD (CTRL_BASE + 0x070C)
+#define CM_TIMER1_CLKSEL (PRCM_BASE + 0x390)
+#define DMM_PAT_BASE_ADDR (DMM_BASE + 0x420)
+#define CM_ALWON_CUST_EFUSE_CLKCTRL (PRCM_BASE + 0x1628)
+
+#define INTCPS_SYSCONFIG 0x48200010
+#define CM_SYSCLK10_CLKSEL 0x48180324
+
+struct cm_pll {
+ unsigned int mainpll_ctrl; /* offset 0x400 */
+ unsigned int mainpll_pwd;
+ unsigned int mainpll_freq1;
+ unsigned int mainpll_div1;
+ unsigned int mainpll_freq2;
+ unsigned int mainpll_div2;
+ unsigned int mainpll_freq3;
+ unsigned int mainpll_div3;
+ unsigned int mainpll_freq4;
+ unsigned int mainpll_div4;
+ unsigned int mainpll_freq5;
+ unsigned int mainpll_div5;
+ unsigned int resv0[1];
+ unsigned int mainpll_div6;
+ unsigned int resv1[1];
+ unsigned int mainpll_div7;
+ unsigned int ddrpll_ctrl; /* offset 0x440 */
+ unsigned int ddrpll_pwd;
+ unsigned int resv2[1];
+ unsigned int ddrpll_div1;
+ unsigned int ddrpll_freq2;
+ unsigned int ddrpll_div2;
+ unsigned int ddrpll_freq3;
+ unsigned int ddrpll_div3;
+ unsigned int ddrpll_freq4;
+ unsigned int ddrpll_div4;
+ unsigned int ddrpll_freq5;
+ unsigned int ddrpll_div5;
+ unsigned int videopll_ctrl; /* offset 0x470 */
+ unsigned int videopll_pwd;
+ unsigned int videopll_freq1;
+ unsigned int videopll_div1;
+ unsigned int videopll_freq2;
+ unsigned int videopll_div2;
+ unsigned int videopll_freq3;
+ unsigned int videopll_div3;
+ unsigned int resv3[4];
+ unsigned int audiopll_ctrl; /* offset 0x4A0 */
+ unsigned int audiopll_pwd;
+ unsigned int resv4[2];
+ unsigned int audiopll_freq2;
+ unsigned int audiopll_div2;
+ unsigned int audiopll_freq3;
+ unsigned int audiopll_div3;
+ unsigned int audiopll_freq4;
+ unsigned int audiopll_div4;
+ unsigned int audiopll_freq5;
+ unsigned int audiopll_div5;
+};
+
+const struct cm_alwon *cmalwon = (struct cm_alwon *)CM_ALWON_BASE;
+const struct cm_def *cmdef = (struct cm_def *)CM_DEFAULT_BASE;
+const struct cm_pll *cmpll = (struct cm_pll *)CM_PLL_BASE;
+const struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;
+
+void enable_dmm_clocks(void)
+{
+ writel(PRCM_MOD_EN, &cmdef->l3fastclkstctrl);
+ writel(PRCM_MOD_EN, &cmdef->emif0clkctrl);
+ writel(PRCM_MOD_EN, &cmdef->emif1clkctrl);
+
+ /* Wait for clocks to be active */
+ while ((readl(&cmdef->l3fastclkstctrl) & 0x300) != 0x300)
+ ;
+ /* Wait for emif0 to be fully functional, including OCP */
+ while (((readl(&cmdef->emif0clkctrl) >> 17) & 0x3) != 0)
+ ;
+ /* Wait for emif1 to be fully functional, including OCP */
+ while (((readl(&cmdef->emif1clkctrl) >> 17) & 0x3) != 0)
+ ;
+
+ writel(PRCM_MOD_EN, &cmdef->dmmclkctrl);
+ /* Wait for dmm to be fully functional, including OCP */
+ while (((readl(&cmdef->dmmclkctrl) >> 17) & 0x3) != 0)
+ ;
+
+ /* Enable Tiled Access */
+ writel(0x80000000, DMM_PAT_BASE_ADDR);
+}
+
+/* assume delay is aprox at least 1us */
+static void ddr_delay(int d)
+{
+ int i;
+
+ /*
+ * read a control register.
+ * this is a bit more delay and cannot be optimized by the compiler
+ * assuming one read takes 200 cycles and A8 is runing 1 GHz
+ * somewhat conservative setting
+ */
+ for (i = 0; i < 50*d; i++)
+ readl(CONTROL_STATUS);
+}
+
+static void main_pll_init_ti816x(void)
+{
+ u32 main_pll_ctrl = 0;
+
+ /* Put the PLL in bypass mode by setting BIT2 in its ctrl reg */
+ main_pll_ctrl = readl(&cmpll->mainpll_ctrl);
+ main_pll_ctrl &= 0xFFFFFFFB;
+ main_pll_ctrl |= BIT(2);
+ writel(main_pll_ctrl, &cmpll->mainpll_ctrl);
+
+ /* Enable PLL by setting BIT3 in its ctrl reg */
+ main_pll_ctrl = readl(&cmpll->mainpll_ctrl);
+ main_pll_ctrl &= 0xFFFFFFF7;
+ main_pll_ctrl |= BIT(3);
+ writel(main_pll_ctrl, &cmpll->mainpll_ctrl);
+
+ /* Write the values of N,P in the CTRL reg */
+ main_pll_ctrl = readl(&cmpll->mainpll_ctrl);
+ main_pll_ctrl &= 0xFF;
+ main_pll_ctrl |= (MAIN_N<<16 | MAIN_P<<8);
+ writel(main_pll_ctrl, &cmpll->mainpll_ctrl);
+
+ /* Power up clock1-7 */
+ writel(0x0, &cmpll->mainpll_pwd);
+
+ /* Program the freq and divider values for clock1-7 */
+ writel((1<<31 | 1<<28 | (MAIN_INTFREQ1<<24) | MAIN_FRACFREQ1),
+ &cmpll->mainpll_freq1);
+ writel(((1<<8) | MAIN_MDIV1), &cmpll->mainpll_div1);
+
+ writel((1<<31 | 1<<28 | (MAIN_INTFREQ2<<24) | MAIN_FRACFREQ2),
+ &cmpll->mainpll_freq2);
+ writel(((1<<8) | MAIN_MDIV2), &cmpll->mainpll_div2);
+
+ writel((1<<31 | 1<<28 | (MAIN_INTFREQ3<<24) | MAIN_FRACFREQ3),
+ &cmpll->mainpll_freq3);
+ writel(((1<<8) | MAIN_MDIV3), &cmpll->mainpll_div3);
+
+ writel((1<<31 | 1<<28 | (MAIN_INTFREQ4<<24) | MAIN_FRACFREQ4),
+ &cmpll->mainpll_freq4);
+ writel(((1<<8) | MAIN_MDIV4), &cmpll->mainpll_div4);
+
+ writel((1<<31 | 1<<28 | (MAIN_INTFREQ5<<24) | MAIN_FRACFREQ5),
+ &cmpll->mainpll_freq5);
+ writel(((1<<8) | MAIN_MDIV5), &cmpll->mainpll_div5);
+
+ writel((1<<8 | MAIN_MDIV6), &cmpll->mainpll_div6);
+
+ writel((1<<8 | MAIN_MDIV7), &cmpll->mainpll_div7);
+
+ /* Wait for PLL to lock */
+ while ((readl(&cmpll->mainpll_ctrl) & BIT(7)) != BIT(7))
+ ;
+
+ /* Put the PLL in normal mode, disable bypass */
+ main_pll_ctrl = readl(&cmpll->mainpll_ctrl);
+ main_pll_ctrl &= 0xFFFFFFFB;
+ writel(main_pll_ctrl, &cmpll->mainpll_ctrl);
+}
+
+static void ddr_pll_bypass_ti816x(void)
+{
+ u32 ddr_pll_ctrl = 0;
+
+ /* Put the PLL in bypass mode by setting BIT2 in its ctrl reg */
+ ddr_pll_ctrl = readl(&cmpll->ddrpll_ctrl);
+ ddr_pll_ctrl &= 0xFFFFFFFB;
+ ddr_pll_ctrl |= BIT(2);
+ writel(ddr_pll_ctrl, &cmpll->ddrpll_ctrl);
+}
+
+static void ddr_pll_init_ti816x(void)
+{
+ u32 ddr_pll_ctrl = 0;
+ /* Enable PLL by setting BIT3 in its ctrl reg */
+ ddr_pll_ctrl = readl(&cmpll->ddrpll_ctrl);
+ ddr_pll_ctrl &= 0xFFFFFFF7;
+ ddr_pll_ctrl |= BIT(3);
+ writel(ddr_pll_ctrl, &cmpll->ddrpll_ctrl);
+
+ /* Write the values of N,P in the CTRL reg */
+ ddr_pll_ctrl = readl(&cmpll->ddrpll_ctrl);
+ ddr_pll_ctrl &= 0xFF;
+ ddr_pll_ctrl |= (DDR_N<<16 | DDR_P<<8);
+ writel(ddr_pll_ctrl, &cmpll->ddrpll_ctrl);
+
+ ddr_delay(10);
+
+ /* Power up clock1-5 */
+ writel(0x0, &cmpll->ddrpll_pwd);
+
+ /* Program the freq and divider values for clock1-3 */
+ writel(((0<<8) | DDR_MDIV1), &cmpll->ddrpll_div1);
+ ddr_delay(1);
+ writel(((1<<8) | DDR_MDIV1), &cmpll->ddrpll_div1);
+ writel((1<<31 | 1<<28 | (DDR_INTFREQ2<<24) | DDR_FRACFREQ2),
+ &cmpll->ddrpll_freq2);
+ writel(((1<<8) | DDR_MDIV2), &cmpll->ddrpll_div2);
+ writel(((0<<8) | DDR_MDIV3), &cmpll->ddrpll_div3);
+ ddr_delay(1);
+ writel(((1<<8) | DDR_MDIV3), &cmpll->ddrpll_div3);
+ ddr_delay(1);
+ writel((0<<31 | 1<<28 | (DDR_INTFREQ3<<24) | DDR_FRACFREQ3),
+ &cmpll->ddrpll_freq3);
+ ddr_delay(1);
+ writel((1<<31 | 1<<28 | (DDR_INTFREQ3<<24) | DDR_FRACFREQ3),
+ &cmpll->ddrpll_freq3);
+
+ ddr_delay(5);
+
+ /* Wait for PLL to lock */
+ while ((readl(&cmpll->ddrpll_ctrl) & BIT(7)) != BIT(7))
+ ;
+
+ /* Power up RCD */
+ writel(BIT(0), DDR_RCD);
+}
+
+static void peripheral_enable(void)
+{
+ /* Wake-up the l3_slow clock */
+ writel(PRCM_MOD_EN, &cmalwon->l3slowclkstctrl);
+
+ /*
+ * Note on Timers:
+ * There are 8 timers(0-7) out of which timer 0 is a secure timer.
+ * Timer 0 mux should not be changed
+ *
+ * To access the timer registers we need the to be
+ * enabled which is what we do in the first step
+ */
+
+ /* Enable timer1 */
+ writel(PRCM_MOD_EN, &cmalwon->timer1clkctrl);
+ /* Select timer1 clock to be CLKIN (27MHz) */
+ writel(BIT(1), CM_TIMER1_CLKSEL);
+
+ /* Wait for timer1 to be ON-ACTIVE */
+ while (((readl(&cmalwon->l3slowclkstctrl)
+ & (0x80000<<1))>>20) != 1)
+ ;
+ /* Wait for timer1 to be enabled */
+ while (((readl(&cmalwon->timer1clkctrl) & 0x30000)>>16) != 0)
+ ;
+ /* Active posted mode */
+ writel(PRCM_MOD_EN, (DM_TIMER1_BASE + 0x54));
+ while (readl(DM_TIMER1_BASE + 0x10) & BIT(0))
+ ;
+ /* Start timer1 */
+ writel(BIT(0), (DM_TIMER1_BASE + 0x38));
+
+ /* eFuse */
+ writel(PRCM_MOD_EN, CM_ALWON_CUST_EFUSE_CLKCTRL);
+ while (readl(CM_ALWON_CUST_EFUSE_CLKCTRL) != PRCM_MOD_EN)
+ ;
+
+ /* Enable gpio0 */
+ writel(PRCM_MOD_EN, &cmalwon->gpio0clkctrl);
+ while (readl(&cmalwon->gpio0clkctrl) != PRCM_MOD_EN)
+ ;
+ writel((BIT(8)), &cmalwon->gpio0clkctrl);
+
+ /* Enable spi */
+ writel(PRCM_MOD_EN, &cmalwon->spiclkctrl);
+ while (readl(&cmalwon->spiclkctrl) != PRCM_MOD_EN)
+ ;
+
+ /* Enable i2c0 */
+ writel(PRCM_MOD_EN, &cmalwon->i2c0clkctrl);
+ while (readl(&cmalwon->i2c0clkctrl) != PRCM_MOD_EN)
+ ;
+
+ /* Enable ethernet0 */
+ writel(PRCM_MOD_EN, &cmalwon->ethclkstctrl);
+ writel(PRCM_MOD_EN, &cmalwon->ethernet0clkctrl);
+ writel(PRCM_MOD_EN, &cmalwon->ethernet1clkctrl);
+
+ /* Enable hsmmc */
+ writel(PRCM_MOD_EN, &cmalwon->sdioclkctrl);
+ while (readl(&cmalwon->sdioclkctrl) != PRCM_MOD_EN)
+ ;
+}
+
+void setup_clocks_for_console(void)
+{
+ /* Fix ROM code bug - from TI-PSP-04.00.02.14 */
+ writel(0x0, CM_SYSCLK10_CLKSEL);
+
+ ddr_pll_bypass_ti816x();
+
+ /* Enable uart0-2 */
+ writel(PRCM_MOD_EN, &cmalwon->uart0clkctrl);
+ while (readl(&cmalwon->uart0clkctrl) != PRCM_MOD_EN)
+ ;
+ writel(PRCM_MOD_EN, &cmalwon->uart1clkctrl);
+ while (readl(&cmalwon->uart1clkctrl) != PRCM_MOD_EN)
+ ;
+ writel(PRCM_MOD_EN, &cmalwon->uart2clkctrl);
+ while (readl(&cmalwon->uart2clkctrl) != PRCM_MOD_EN)
+ ;
+ while ((readl(&cmalwon->l3slowclkstctrl) & 0x2100) != 0x2100)
+ ;
+}
+
+void prcm_init(void)
+{
+ /* Enable the control */
+ writel(PRCM_MOD_EN, &cmalwon->controlclkctrl);
+
+ main_pll_init_ti816x();
+ ddr_pll_init_ti816x();
+
+ /*
+ * With clk freqs setup to desired values,
+ * enable the required peripherals
+ */
+ peripheral_enable();
+}
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