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u-boot/arch/arm/cpu/armv7/am33xx/clock_ti816x.c
TENART Antoine dcf846d5da Add TI816X support 
Signed-off-by: Antoine Tenart <atenart@adeneo-embedded.com>
[trini: Fix warnings about vtp things in emif4.c, adapt AM43XX]
Signed-off-by: Tom Rini <trini@ti.com>
2013-08-15 18:38:37 -04:00

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/*
* 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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