arch/arm/cpu/armv7/am33xx/clock_ti816x.c - u-boot - Git at Google

 /*
  * 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();
 }
	/*
	* 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();
	}