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u-boot/arch/arm/cpu/armv7/omap3/clock.c
Govindraj.R 95f8791042 OMAP3+: Clock: Adding ehci clock enabling 
Adding ehci clock enabling mechanism part of clock framework.
When essential clocks are enabled during init phase usb host
clocks can also be enabled from clock framework.

Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
Tested-by: Stefano Babic <sbabic@denx.de>
2012-02-12 10:11:31 +01:00

718 lines
22 KiB
C
Raw Blame History

/*
* (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>
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/clocks.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) {
/* 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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