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u-boot/arch/arm/cpu/armv7/omap3/clock.c
Wolfgang Denk 1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files 
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00

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/*
* (C) Copyright 2008
* Texas Instruments, <www.ti.com>
*
* Author :
* Manikandan Pillai <mani.pillai@ti.com>
*
* Derived from Beagle Board and OMAP3 SDP code by
* Richard Woodruff <r-woodruff2@ti.com>
* Syed Mohammed Khasim <khasim@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/clocks_omap3.h>
#include <asm/arch/mem.h>
#include <asm/arch/sys_proto.h>
#include <environment.h>
#include <command.h>
/******************************************************************************
* get_sys_clk_speed() - determine reference oscillator speed
* based on known 32kHz clock and gptimer.
*****************************************************************************/
u32 get_osc_clk_speed(void)
{
u32 start, cstart, cend, cdiff, cdiv, val;
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
struct prm *prm_base = (struct prm *)PRM_BASE;
struct gptimer *gpt1_base = (struct gptimer *)OMAP34XX_GPT1;
struct s32ktimer *s32k_base = (struct s32ktimer *)SYNC_32KTIMER_BASE;
val = readl(&prm_base->clksrc_ctrl);
if (val & SYSCLKDIV_2)
cdiv = 2;
else
cdiv = 1;
/* enable timer2 */
val = readl(&prcm_base->clksel_wkup) | CLKSEL_GPT1;
/* select sys_clk for GPT1 */
writel(val, &prcm_base->clksel_wkup);
/* Enable I and F Clocks for GPT1 */
val = readl(&prcm_base->iclken_wkup) | EN_GPT1 | EN_32KSYNC;
writel(val, &prcm_base->iclken_wkup);
val = readl(&prcm_base->fclken_wkup) | EN_GPT1;
writel(val, &prcm_base->fclken_wkup);
writel(0, &gpt1_base->tldr); /* start counting at 0 */
writel(GPT_EN, &gpt1_base->tclr); /* enable clock */
/* enable 32kHz source, determine sys_clk via gauging */
/* start time in 20 cycles */
start = 20 + readl(&s32k_base->s32k_cr);
/* dead loop till start time */
while (readl(&s32k_base->s32k_cr) < start);
/* get start sys_clk count */
cstart = readl(&gpt1_base->tcrr);
/* wait for 40 cycles */
while (readl(&s32k_base->s32k_cr) < (start + 20)) ;
cend = readl(&gpt1_base->tcrr); /* get end sys_clk count */
cdiff = cend - cstart; /* get elapsed ticks */
cdiff *= cdiv;
/* based on number of ticks assign speed */
if (cdiff > 19000)
return S38_4M;
else if (cdiff > 15200)
return S26M;
else if (cdiff > 13000)
return S24M;
else if (cdiff > 9000)
return S19_2M;
else if (cdiff > 7600)
return S13M;
else
return S12M;
}
/******************************************************************************
* get_sys_clkin_sel() - returns the sys_clkin_sel field value based on
* input oscillator clock frequency.
*****************************************************************************/
void get_sys_clkin_sel(u32 osc_clk, u32 *sys_clkin_sel)
{
switch(osc_clk) {
case S38_4M:
*sys_clkin_sel = 4;
break;
case S26M:
*sys_clkin_sel = 3;
break;
case S19_2M:
*sys_clkin_sel = 2;
break;
case S13M:
*sys_clkin_sel = 1;
break;
case S12M:
default:
*sys_clkin_sel = 0;
}
}
/*
* OMAP34XX/35XX specific functions
*/
static void dpll3_init_34xx(u32 sil_index, u32 clk_index)
{
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
dpll_param *ptr = (dpll_param *) get_core_dpll_param();
void (*f_lock_pll) (u32, u32, u32, u32);
int xip_safe, p0, p1, p2, p3;
xip_safe = is_running_in_sram();
/* Moving to the right sysclk and ES rev base */
ptr = ptr + (3 * clk_index) + sil_index;
if (xip_safe) {
/*
* CORE DPLL
* sr32(CM_CLKSEL2_EMU) set override to work when asleep
*/
sr32(&prcm_base->clken_pll, 0, 3, PLL_FAST_RELOCK_BYPASS);
wait_on_value(ST_CORE_CLK, 0, &prcm_base->idlest_ckgen,
LDELAY);
/*
* For OMAP3 ES1.0 Errata 1.50, default value directly doesn't
* work. write another value and then default value.
*/
/* CM_CLKSEL1_EMU[DIV_DPLL3] */
sr32(&prcm_base->clksel1_emu, 16, 5, (CORE_M3X2 + 1)) ;
sr32(&prcm_base->clksel1_emu, 16, 5, CORE_M3X2);
/* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */
sr32(&prcm_base->clksel1_pll, 27, 5, ptr->m2);
/* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */
sr32(&prcm_base->clksel1_pll, 16, 11, ptr->m);
/* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */
sr32(&prcm_base->clksel1_pll, 8, 7, ptr->n);
/* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */
sr32(&prcm_base->clksel1_pll, 6, 1, 0);
/* SSI */
sr32(&prcm_base->clksel_core, 8, 4, CORE_SSI_DIV);
/* FSUSB */
sr32(&prcm_base->clksel_core, 4, 2, CORE_FUSB_DIV);
/* L4 */
sr32(&prcm_base->clksel_core, 2, 2, CORE_L4_DIV);
/* L3 */
sr32(&prcm_base->clksel_core, 0, 2, CORE_L3_DIV);
/* GFX */
sr32(&prcm_base->clksel_gfx, 0, 3, GFX_DIV);
/* RESET MGR */
sr32(&prcm_base->clksel_wkup, 1, 2, WKUP_RSM);
/* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */
sr32(&prcm_base->clken_pll, 4, 4, ptr->fsel);
/* LOCK MODE */
sr32(&prcm_base->clken_pll, 0, 3, PLL_LOCK);
wait_on_value(ST_CORE_CLK, 1, &prcm_base->idlest_ckgen,
LDELAY);
} else if (is_running_in_flash()) {
/*
* if running from flash, jump to small relocated code
* area in SRAM.
*/
f_lock_pll = (void *) ((u32) &_end_vect - (u32) &_start +
SRAM_VECT_CODE);
p0 = readl(&prcm_base->clken_pll);
sr32(&p0, 0, 3, PLL_FAST_RELOCK_BYPASS);
/* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */
sr32(&p0, 4, 4, ptr->fsel);
p1 = readl(&prcm_base->clksel1_pll);
/* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */
sr32(&p1, 27, 5, ptr->m2);
/* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */
sr32(&p1, 16, 11, ptr->m);
/* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */
sr32(&p1, 8, 7, ptr->n);
/* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */
sr32(&p1, 6, 1, 0);
p2 = readl(&prcm_base->clksel_core);
/* SSI */
sr32(&p2, 8, 4, CORE_SSI_DIV);
/* FSUSB */
sr32(&p2, 4, 2, CORE_FUSB_DIV);
/* L4 */
sr32(&p2, 2, 2, CORE_L4_DIV);
/* L3 */
sr32(&p2, 0, 2, CORE_L3_DIV);
p3 = (u32)&prcm_base->idlest_ckgen;
(*f_lock_pll) (p0, p1, p2, p3);
}
}
static void dpll4_init_34xx(u32 sil_index, u32 clk_index)
{
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
dpll_param *ptr = (dpll_param *) get_per_dpll_param();
/* Moving it to the right sysclk base */
ptr = ptr + clk_index;
/* EN_PERIPH_DPLL: CM_CLKEN_PLL[16:18] */
sr32(&prcm_base->clken_pll, 16, 3, PLL_STOP);
wait_on_value(ST_PERIPH_CLK, 0, &prcm_base->idlest_ckgen, LDELAY);
/*
* Errata 1.50 Workaround for OMAP3 ES1.0 only
* If using default divisors, write default divisor + 1
* and then the actual divisor value
*/
/* M6 */
sr32(&prcm_base->clksel1_emu, 24, 5, (PER_M6X2 + 1));
sr32(&prcm_base->clksel1_emu, 24, 5, PER_M6X2);
/* M5 */
sr32(&prcm_base->clksel_cam, 0, 5, (PER_M5X2 + 1));
sr32(&prcm_base->clksel_cam, 0, 5, PER_M5X2);
/* M4 */
sr32(&prcm_base->clksel_dss, 0, 5, (PER_M4X2 + 1));
sr32(&prcm_base->clksel_dss, 0, 5, PER_M4X2);
/* M3 */
sr32(&prcm_base->clksel_dss, 8, 5, (PER_M3X2 + 1));
sr32(&prcm_base->clksel_dss, 8, 5, PER_M3X2);
/* M2 (DIV_96M): CM_CLKSEL3_PLL[0:4] */
sr32(&prcm_base->clksel3_pll, 0, 5, (ptr->m2 + 1));
sr32(&prcm_base->clksel3_pll, 0, 5, ptr->m2);
/* Workaround end */
/* M (PERIPH_DPLL_MULT): CM_CLKSEL2_PLL[8:18] */
sr32(&prcm_base->clksel2_pll, 8, 11, ptr->m);
/* N (PERIPH_DPLL_DIV): CM_CLKSEL2_PLL[0:6] */
sr32(&prcm_base->clksel2_pll, 0, 7, ptr->n);
/* FREQSEL (PERIPH_DPLL_FREQSEL): CM_CLKEN_PLL[20:23] */
sr32(&prcm_base->clken_pll, 20, 4, ptr->fsel);
/* LOCK MODE (EN_PERIPH_DPLL): CM_CLKEN_PLL[16:18] */
sr32(&prcm_base->clken_pll, 16, 3, PLL_LOCK);
wait_on_value(ST_PERIPH_CLK, 2, &prcm_base->idlest_ckgen, LDELAY);
}
static void dpll5_init_34xx(u32 sil_index, u32 clk_index)
{
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
dpll_param *ptr = (dpll_param *) get_per2_dpll_param();
/* Moving it to the right sysclk base */
ptr = ptr + clk_index;
/* PER2 DPLL (DPLL5) */
sr32(&prcm_base->clken2_pll, 0, 3, PLL_STOP);
wait_on_value(1, 0, &prcm_base->idlest2_ckgen, LDELAY);
sr32(&prcm_base->clksel5_pll, 0, 5, ptr->m2); /* set M2 (usbtll_fck) */
sr32(&prcm_base->clksel4_pll, 8, 11, ptr->m); /* set m (11-bit multiplier) */
sr32(&prcm_base->clksel4_pll, 0, 7, ptr->n); /* set n (7-bit divider)*/
sr32(&prcm_base->clken_pll, 4, 4, ptr->fsel); /* FREQSEL */
sr32(&prcm_base->clken2_pll, 0, 3, PLL_LOCK); /* lock mode */
wait_on_value(1, 1, &prcm_base->idlest2_ckgen, LDELAY);
}
static void mpu_init_34xx(u32 sil_index, u32 clk_index)
{
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
dpll_param *ptr = (dpll_param *) get_mpu_dpll_param();
/* Moving to the right sysclk and ES rev base */
ptr = ptr + (3 * clk_index) + sil_index;
/* MPU DPLL (unlocked already) */
/* M2 (MPU_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_MPU[0:4] */
sr32(&prcm_base->clksel2_pll_mpu, 0, 5, ptr->m2);
/* M (MPU_DPLL_MULT) : CM_CLKSEL2_PLL_MPU[8:18] */
sr32(&prcm_base->clksel1_pll_mpu, 8, 11, ptr->m);
/* N (MPU_DPLL_DIV) : CM_CLKSEL2_PLL_MPU[0:6] */
sr32(&prcm_base->clksel1_pll_mpu, 0, 7, ptr->n);
/* FREQSEL (MPU_DPLL_FREQSEL) : CM_CLKEN_PLL_MPU[4:7] */
sr32(&prcm_base->clken_pll_mpu, 4, 4, ptr->fsel);
}
static void iva_init_34xx(u32 sil_index, u32 clk_index)
{
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
dpll_param *ptr = (dpll_param *) get_iva_dpll_param();
/* Moving to the right sysclk and ES rev base */
ptr = ptr + (3 * clk_index) + sil_index;
/* IVA DPLL */
/* EN_IVA2_DPLL : CM_CLKEN_PLL_IVA2[0:2] */
sr32(&prcm_base->clken_pll_iva2, 0, 3, PLL_STOP);
wait_on_value(ST_IVA2_CLK, 0, &prcm_base->idlest_pll_iva2, LDELAY);
/* M2 (IVA2_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_IVA2[0:4] */
sr32(&prcm_base->clksel2_pll_iva2, 0, 5, ptr->m2);
/* M (IVA2_DPLL_MULT) : CM_CLKSEL1_PLL_IVA2[8:18] */
sr32(&prcm_base->clksel1_pll_iva2, 8, 11, ptr->m);
/* N (IVA2_DPLL_DIV) : CM_CLKSEL1_PLL_IVA2[0:6] */
sr32(&prcm_base->clksel1_pll_iva2, 0, 7, ptr->n);
/* FREQSEL (IVA2_DPLL_FREQSEL) : CM_CLKEN_PLL_IVA2[4:7] */
sr32(&prcm_base->clken_pll_iva2, 4, 4, ptr->fsel);
/* LOCK MODE (EN_IVA2_DPLL) : CM_CLKEN_PLL_IVA2[0:2] */
sr32(&prcm_base->clken_pll_iva2, 0, 3, PLL_LOCK);
wait_on_value(ST_IVA2_CLK, 1, &prcm_base->idlest_pll_iva2, LDELAY);
}
/*
* OMAP3630 specific functions
*/
static void dpll3_init_36xx(u32 sil_index, u32 clk_index)
{
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
dpll_param *ptr = (dpll_param *) get_36x_core_dpll_param();
void (*f_lock_pll) (u32, u32, u32, u32);
int xip_safe, p0, p1, p2, p3;
xip_safe = is_running_in_sram();
/* Moving it to the right sysclk base */
ptr += clk_index;
if (xip_safe) {
/* CORE DPLL */
/* Select relock bypass: CM_CLKEN_PLL[0:2] */
sr32(&prcm_base->clken_pll, 0, 3, PLL_FAST_RELOCK_BYPASS);
wait_on_value(ST_CORE_CLK, 0, &prcm_base->idlest_ckgen,
LDELAY);
/* CM_CLKSEL1_EMU[DIV_DPLL3] */
sr32(&prcm_base->clksel1_emu, 16, 5, CORE_M3X2);
/* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */
sr32(&prcm_base->clksel1_pll, 27, 5, ptr->m2);
/* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */
sr32(&prcm_base->clksel1_pll, 16, 11, ptr->m);
/* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */
sr32(&prcm_base->clksel1_pll, 8, 7, ptr->n);
/* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */
sr32(&prcm_base->clksel1_pll, 6, 1, 0);
/* SSI */
sr32(&prcm_base->clksel_core, 8, 4, CORE_SSI_DIV);
/* FSUSB */
sr32(&prcm_base->clksel_core, 4, 2, CORE_FUSB_DIV);
/* L4 */
sr32(&prcm_base->clksel_core, 2, 2, CORE_L4_DIV);
/* L3 */
sr32(&prcm_base->clksel_core, 0, 2, CORE_L3_DIV);
/* GFX */
sr32(&prcm_base->clksel_gfx, 0, 3, GFX_DIV_36X);
/* RESET MGR */
sr32(&prcm_base->clksel_wkup, 1, 2, WKUP_RSM);
/* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */
sr32(&prcm_base->clken_pll, 4, 4, ptr->fsel);
/* LOCK MODE */
sr32(&prcm_base->clken_pll, 0, 3, PLL_LOCK);
wait_on_value(ST_CORE_CLK, 1, &prcm_base->idlest_ckgen,
LDELAY);
} else if (is_running_in_flash()) {
/*
* if running from flash, jump to small relocated code
* area in SRAM.
*/
f_lock_pll = (void *) ((u32) &_end_vect - (u32) &_start +
SRAM_VECT_CODE);
p0 = readl(&prcm_base->clken_pll);
sr32(&p0, 0, 3, PLL_FAST_RELOCK_BYPASS);
/* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */
sr32(&p0, 4, 4, ptr->fsel);
p1 = readl(&prcm_base->clksel1_pll);
/* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */
sr32(&p1, 27, 5, ptr->m2);
/* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */
sr32(&p1, 16, 11, ptr->m);
/* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */
sr32(&p1, 8, 7, ptr->n);
/* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */
sr32(&p1, 6, 1, 0);
p2 = readl(&prcm_base->clksel_core);
/* SSI */
sr32(&p2, 8, 4, CORE_SSI_DIV);
/* FSUSB */
sr32(&p2, 4, 2, CORE_FUSB_DIV);
/* L4 */
sr32(&p2, 2, 2, CORE_L4_DIV);
/* L3 */
sr32(&p2, 0, 2, CORE_L3_DIV);
p3 = (u32)&prcm_base->idlest_ckgen;
(*f_lock_pll) (p0, p1, p2, p3);
}
}
static void dpll4_init_36xx(u32 sil_index, u32 clk_index)
{
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
struct dpll_per_36x_param *ptr;
ptr = (struct dpll_per_36x_param *)get_36x_per_dpll_param();
/* Moving it to the right sysclk base */
ptr += clk_index;
/* EN_PERIPH_DPLL: CM_CLKEN_PLL[16:18] */
sr32(&prcm_base->clken_pll, 16, 3, PLL_STOP);
wait_on_value(ST_PERIPH_CLK, 0, &prcm_base->idlest_ckgen, LDELAY);
/* M6 (DIV_DPLL4): CM_CLKSEL1_EMU[24:29] */
sr32(&prcm_base->clksel1_emu, 24, 6, ptr->m6);
/* M5 (CLKSEL_CAM): CM_CLKSEL1_EMU[0:5] */
sr32(&prcm_base->clksel_cam, 0, 6, ptr->m5);
/* M4 (CLKSEL_DSS1): CM_CLKSEL_DSS[0:5] */
sr32(&prcm_base->clksel_dss, 0, 6, ptr->m4);
/* M3 (CLKSEL_DSS1): CM_CLKSEL_DSS[8:13] */
sr32(&prcm_base->clksel_dss, 8, 6, ptr->m3);
/* M2 (DIV_96M): CM_CLKSEL3_PLL[0:4] */
sr32(&prcm_base->clksel3_pll, 0, 5, ptr->m2);
/* M (PERIPH_DPLL_MULT): CM_CLKSEL2_PLL[8:19] */
sr32(&prcm_base->clksel2_pll, 8, 12, ptr->m);
/* N (PERIPH_DPLL_DIV): CM_CLKSEL2_PLL[0:6] */
sr32(&prcm_base->clksel2_pll, 0, 7, ptr->n);
/* M2DIV (CLKSEL_96M): CM_CLKSEL_CORE[12:13] */
sr32(&prcm_base->clksel_core, 12, 2, ptr->m2div);
/* LOCK MODE (EN_PERIPH_DPLL): CM_CLKEN_PLL[16:18] */
sr32(&prcm_base->clken_pll, 16, 3, PLL_LOCK);
wait_on_value(ST_PERIPH_CLK, 2, &prcm_base->idlest_ckgen, LDELAY);
}
static void mpu_init_36xx(u32 sil_index, u32 clk_index)
{
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
dpll_param *ptr = (dpll_param *) get_36x_mpu_dpll_param();
/* Moving to the right sysclk */
ptr += clk_index;
/* MPU DPLL (unlocked already */
/* M2 (MPU_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_MPU[0:4] */
sr32(&prcm_base->clksel2_pll_mpu, 0, 5, ptr->m2);
/* M (MPU_DPLL_MULT) : CM_CLKSEL2_PLL_MPU[8:18] */
sr32(&prcm_base->clksel1_pll_mpu, 8, 11, ptr->m);
/* N (MPU_DPLL_DIV) : CM_CLKSEL2_PLL_MPU[0:6] */
sr32(&prcm_base->clksel1_pll_mpu, 0, 7, ptr->n);
}
static void iva_init_36xx(u32 sil_index, u32 clk_index)
{
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
dpll_param *ptr = (dpll_param *)get_36x_iva_dpll_param();
/* Moving to the right sysclk */
ptr += clk_index;
/* IVA DPLL */
/* EN_IVA2_DPLL : CM_CLKEN_PLL_IVA2[0:2] */
sr32(&prcm_base->clken_pll_iva2, 0, 3, PLL_STOP);
wait_on_value(ST_IVA2_CLK, 0, &prcm_base->idlest_pll_iva2, LDELAY);
/* M2 (IVA2_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_IVA2[0:4] */
sr32(&prcm_base->clksel2_pll_iva2, 0, 5, ptr->m2);
/* M (IVA2_DPLL_MULT) : CM_CLKSEL1_PLL_IVA2[8:18] */
sr32(&prcm_base->clksel1_pll_iva2, 8, 11, ptr->m);
/* N (IVA2_DPLL_DIV) : CM_CLKSEL1_PLL_IVA2[0:6] */
sr32(&prcm_base->clksel1_pll_iva2, 0, 7, ptr->n);
/* LOCK (MODE (EN_IVA2_DPLL) : CM_CLKEN_PLL_IVA2[0:2] */
sr32(&prcm_base->clken_pll_iva2, 0, 3, PLL_LOCK);
wait_on_value(ST_IVA2_CLK, 1, &prcm_base->idlest_pll_iva2, LDELAY);
}
/******************************************************************************
* prcm_init() - inits clocks for PRCM as defined in clocks.h
* called from SRAM, or Flash (using temp SRAM stack).
*****************************************************************************/
void prcm_init(void)
{
u32 osc_clk = 0, sys_clkin_sel;
u32 clk_index, sil_index = 0;
struct prm *prm_base = (struct prm *)PRM_BASE;
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
/*
* Gauge the input clock speed and find out the sys_clkin_sel
* value corresponding to the input clock.
*/
osc_clk = get_osc_clk_speed();
get_sys_clkin_sel(osc_clk, &sys_clkin_sel);
/* set input crystal speed */
sr32(&prm_base->clksel, 0, 3, sys_clkin_sel);
/* If the input clock is greater than 19.2M always divide/2 */
if (sys_clkin_sel > 2) {
/* input clock divider */
sr32(&prm_base->clksrc_ctrl, 6, 2, 2);
clk_index = sys_clkin_sel / 2;
} else {
/* input clock divider */
sr32(&prm_base->clksrc_ctrl, 6, 2, 1);
clk_index = sys_clkin_sel;
}
if (get_cpu_family() == CPU_OMAP36XX) {
/*
* In warm reset conditions on OMAP36xx/AM/DM37xx
* the rom code incorrectly sets the DPLL4 clock
* input divider to /6.5. Section 3.5.3.3.3.2.1 of
* the AM/DM37x TRM explains that the /6.5 divider
* is used only when the input clock is 13MHz.
*
* If the part is in this cpu family *and* the input
* clock *is not* 13 MHz, then reset the DPLL4 clock
* input divider to /1 as it should never set to /6.5
* in this case.
*/
if (sys_clkin_sel != 1) /* 13 MHz */
/* Bit 8: DPLL4_CLKINP_DIV */
sr32(&prm_base->clksrc_ctrl, 8, 1, 0);
/* Unlock MPU DPLL (slows things down, and needed later) */
sr32(&prcm_base->clken_pll_mpu, 0, 3, PLL_LOW_POWER_BYPASS);
wait_on_value(ST_MPU_CLK, 0, &prcm_base->idlest_pll_mpu,
LDELAY);
dpll3_init_36xx(0, clk_index);
dpll4_init_36xx(0, clk_index);
dpll5_init_34xx(0, clk_index);
iva_init_36xx(0, clk_index);
mpu_init_36xx(0, clk_index);
/* Lock MPU DPLL to set frequency */
sr32(&prcm_base->clken_pll_mpu, 0, 3, PLL_LOCK);
wait_on_value(ST_MPU_CLK, 1, &prcm_base->idlest_pll_mpu,
LDELAY);
} else {
/*
* The DPLL tables are defined according to sysclk value and
* silicon revision. The clk_index value will be used to get
* the values for that input sysclk from the DPLL param table
* and sil_index will get the values for that SysClk for the
* appropriate silicon rev.
*/
if (((get_cpu_family() == CPU_OMAP34XX)
&& (get_cpu_rev() >= CPU_3XX_ES20)) ||
(get_cpu_family() == CPU_AM35XX))
sil_index = 1;
/* Unlock MPU DPLL (slows things down, and needed later) */
sr32(&prcm_base->clken_pll_mpu, 0, 3, PLL_LOW_POWER_BYPASS);
wait_on_value(ST_MPU_CLK, 0, &prcm_base->idlest_pll_mpu,
LDELAY);
dpll3_init_34xx(sil_index, clk_index);
dpll4_init_34xx(sil_index, clk_index);
dpll5_init_34xx(sil_index, clk_index);
if (get_cpu_family() != CPU_AM35XX)
iva_init_34xx(sil_index, clk_index);
mpu_init_34xx(sil_index, clk_index);
/* Lock MPU DPLL to set frequency */
sr32(&prcm_base->clken_pll_mpu, 0, 3, PLL_LOCK);
wait_on_value(ST_MPU_CLK, 1, &prcm_base->idlest_pll_mpu,
LDELAY);
}
/* Set up GPTimers to sys_clk source only */
sr32(&prcm_base->clksel_per, 0, 8, 0xff);
sr32(&prcm_base->clksel_wkup, 0, 1, 1);
sdelay(5000);
}
/*
* Enable usb ehci uhh, tll clocks
*/
void ehci_clocks_enable(void)
{
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
/* Enable USBHOST_L3_ICLK (USBHOST_MICLK) */
sr32(&prcm_base->iclken_usbhost, 0, 1, 1);
/*
* Enable USBHOST_48M_FCLK (USBHOST_FCLK1)
* and USBHOST_120M_FCLK (USBHOST_FCLK2)
*/
sr32(&prcm_base->fclken_usbhost, 0, 2, 3);
/* Enable USBTTL_ICLK */
sr32(&prcm_base->iclken3_core, 2, 1, 1);
/* Enable USBTTL_FCLK */
sr32(&prcm_base->fclken3_core, 2, 1, 1);
}
/******************************************************************************
* peripheral_enable() - Enable the clks & power for perifs (GPT2, UART1,...)
*****************************************************************************/
void per_clocks_enable(void)
{
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
/* Enable GP2 timer. */
sr32(&prcm_base->clksel_per, 0, 1, 0x1); /* GPT2 = sys clk */
sr32(&prcm_base->iclken_per, 3, 1, 0x1); /* ICKen GPT2 */
sr32(&prcm_base->fclken_per, 3, 1, 0x1); /* FCKen GPT2 */
#ifdef CONFIG_SYS_NS16550
/* Enable UART1 clocks */
sr32(&prcm_base->fclken1_core, 13, 1, 0x1);
sr32(&prcm_base->iclken1_core, 13, 1, 0x1);
/* UART 3 Clocks */
sr32(&prcm_base->fclken_per, 11, 1, 0x1);
sr32(&prcm_base->iclken_per, 11, 1, 0x1);
#endif
#ifdef CONFIG_OMAP3_GPIO_2
sr32(&prcm_base->fclken_per, 13, 1, 1);
sr32(&prcm_base->iclken_per, 13, 1, 1);
#endif
#ifdef CONFIG_OMAP3_GPIO_3
sr32(&prcm_base->fclken_per, 14, 1, 1);
sr32(&prcm_base->iclken_per, 14, 1, 1);
#endif
#ifdef CONFIG_OMAP3_GPIO_4
sr32(&prcm_base->fclken_per, 15, 1, 1);
sr32(&prcm_base->iclken_per, 15, 1, 1);
#endif
#ifdef CONFIG_OMAP3_GPIO_5
sr32(&prcm_base->fclken_per, 16, 1, 1);
sr32(&prcm_base->iclken_per, 16, 1, 1);
#endif
#ifdef CONFIG_OMAP3_GPIO_6
sr32(&prcm_base->fclken_per, 17, 1, 1);
sr32(&prcm_base->iclken_per, 17, 1, 1);
#endif
#ifdef CONFIG_DRIVER_OMAP34XX_I2C
/* Turn on all 3 I2C clocks */
sr32(&prcm_base->fclken1_core, 15, 3, 0x7);
sr32(&prcm_base->iclken1_core, 15, 3, 0x7); /* I2C1,2,3 = on */
#endif
/* Enable the ICLK for 32K Sync Timer as its used in udelay */
sr32(&prcm_base->iclken_wkup, 2, 1, 0x1);
if (get_cpu_family() != CPU_AM35XX)
sr32(&prcm_base->fclken_iva2, 0, 32, FCK_IVA2_ON);
sr32(&prcm_base->fclken1_core, 0, 32, FCK_CORE1_ON);
sr32(&prcm_base->iclken1_core, 0, 32, ICK_CORE1_ON);
sr32(&prcm_base->iclken2_core, 0, 32, ICK_CORE2_ON);
sr32(&prcm_base->fclken_wkup, 0, 32, FCK_WKUP_ON);
sr32(&prcm_base->iclken_wkup, 0, 32, ICK_WKUP_ON);
sr32(&prcm_base->fclken_dss, 0, 32, FCK_DSS_ON);
sr32(&prcm_base->iclken_dss, 0, 32, ICK_DSS_ON);
if (get_cpu_family() != CPU_AM35XX) {
sr32(&prcm_base->fclken_cam, 0, 32, FCK_CAM_ON);
sr32(&prcm_base->iclken_cam, 0, 32, ICK_CAM_ON);
}
sr32(&prcm_base->fclken_per, 0, 32, FCK_PER_ON);
sr32(&prcm_base->iclken_per, 0, 32, ICK_PER_ON);
sdelay(1000);
}
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