arch/arm/cpu/armv7/omap4/clocks.c

/*
 *
 * Clock initialization for OMAP4
 *
 * (C) Copyright 2010
 * Texas Instruments, <www.ti.com>
 *
 * Aneesh V <aneesh@ti.com>
 *
 * Based on previous work by:
 *	Santosh Shilimkar <santosh.shilimkar@ti.com>
 *	Rajendra Nayak <rnayak@ti.com>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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/omap_common.h>
#include <asm/gpio.h>
#include <asm/arch/clocks.h>
#include <asm/arch/sys_proto.h>
#include <asm/utils.h>
#include <asm/omap_gpio.h>

#ifndef CONFIG_SPL_BUILD
/*
 * printing to console doesn't work unless
 * this code is executed from SPL
 */
#define printf(fmt, args...)
#define puts(s)
#endif

#define abs(x) (((x) < 0) ? ((x)*-1) : (x))

struct omap4_prcm_regs *const prcm = (struct omap4_prcm_regs *)0x4A004100;

const u32 sys_clk_array[8] = {
	12000000,	       /* 12 MHz */
	13000000,	       /* 13 MHz */
	16800000,	       /* 16.8 MHz */
	19200000,	       /* 19.2 MHz */
	26000000,	       /* 26 MHz */
	27000000,	       /* 27 MHz */
	38400000,	       /* 38.4 MHz */
};

/*
 * The M & N values in the following tables are created using the
 * following tool:
 * tools/omap/clocks_get_m_n.c
 * Please use this tool for creating the table for any new frequency.
 */

/* dpll locked at 1400 MHz MPU clk at 700 MHz(OPP100) - DCC OFF */
static const struct dpll_params mpu_dpll_params_1400mhz[NUM_SYS_CLKS] = {
	{175, 2, 1, -1, -1, -1, -1, -1},	/* 12 MHz   */
	{700, 12, 1, -1, -1, -1, -1, -1},	/* 13 MHz   */
	{125, 2, 1, -1, -1, -1, -1, -1},	/* 16.8 MHz */
	{401, 10, 1, -1, -1, -1, -1, -1},	/* 19.2 MHz */
	{350, 12, 1, -1, -1, -1, -1, -1},	/* 26 MHz   */
	{700, 26, 1, -1, -1, -1, -1, -1},	/* 27 MHz   */
	{638, 34, 1, -1, -1, -1, -1, -1}	/* 38.4 MHz */
};

/* dpll locked at 1584 MHz - MPU clk at 792 MHz(OPP Turbo 4430) */
static const struct dpll_params mpu_dpll_params_1600mhz[NUM_SYS_CLKS] = {
	{200, 2, 1, -1, -1, -1, -1, -1},	/* 12 MHz   */
	{800, 12, 1, -1, -1, -1, -1, -1},	/* 13 MHz   */
	{619, 12, 1, -1, -1, -1, -1, -1},	/* 16.8 MHz */
	{125, 2, 1, -1, -1, -1, -1, -1},	/* 19.2 MHz */
	{400, 12, 1, -1, -1, -1, -1, -1},	/* 26 MHz   */
	{800, 26, 1, -1, -1, -1, -1, -1},	/* 27 MHz   */
	{125, 5, 1, -1, -1, -1, -1, -1}		/* 38.4 MHz */
};

/* dpll locked at 1200 MHz - MPU clk at 600 MHz */
static const struct dpll_params mpu_dpll_params_1200mhz[NUM_SYS_CLKS] = {
	{50, 0, 1, -1, -1, -1, -1, -1},		/* 12 MHz   */
	{600, 12, 1, -1, -1, -1, -1, -1},	/* 13 MHz   */
	{250, 6, 1, -1, -1, -1, -1, -1},	/* 16.8 MHz */
	{125, 3, 1, -1, -1, -1, -1, -1},	/* 19.2 MHz */
	{300, 12, 1, -1, -1, -1, -1, -1},	/* 26 MHz   */
	{200, 8, 1, -1, -1, -1, -1, -1},	/* 27 MHz   */
	{125, 7, 1, -1, -1, -1, -1, -1}		/* 38.4 MHz */
};

static const struct dpll_params core_dpll_params_1600mhz[NUM_SYS_CLKS] = {
	{200, 2, 1, 5, 8, 4, 6, 5},	/* 12 MHz   */
	{800, 12, 1, 5, 8, 4, 6, 5},	/* 13 MHz   */
	{619, 12, 1, 5, 8, 4, 6, 5},	/* 16.8 MHz */
	{125, 2, 1, 5, 8, 4, 6, 5},	/* 19.2 MHz */
	{400, 12, 1, 5, 8, 4, 6, 5},	/* 26 MHz   */
	{800, 26, 1, 5, 8, 4, 6, 5},	/* 27 MHz   */
	{125, 5, 1, 5, 8, 4, 6, 5}	/* 38.4 MHz */
};

static const struct dpll_params core_dpll_params_es1_1524mhz[NUM_SYS_CLKS] = {
	{127, 1, 1, 5, 8, 4, 6, 5},	/* 12 MHz   */
	{762, 12, 1, 5, 8, 4, 6, 5},	/* 13 MHz   */
	{635, 13, 1, 5, 8, 4, 6, 5},	/* 16.8 MHz */
	{635, 15, 1, 5, 8, 4, 6, 5},	/* 19.2 MHz */
	{381, 12, 1, 5, 8, 4, 6, 5},	/* 26 MHz   */
	{254, 8, 1, 5, 8, 4, 6, 5},	/* 27 MHz   */
	{496, 24, 1, 5, 8, 4, 6, 5}	/* 38.4 MHz */
};

static const struct dpll_params
		core_dpll_params_es2_1600mhz_ddr200mhz[NUM_SYS_CLKS] = {
	{200, 2, 2, 5, 8, 4, 6, 5},	/* 12 MHz   */
	{800, 12, 2, 5, 8, 4, 6, 5},	/* 13 MHz   */
	{619, 12, 2, 5, 8, 4, 6, 5},	/* 16.8 MHz */
	{125, 2, 2, 5, 8, 4, 6, 5},	/* 19.2 MHz */
	{400, 12, 2, 5, 8, 4, 6, 5},	/* 26 MHz   */
	{800, 26, 2, 5, 8, 4, 6, 5},	/* 27 MHz   */
	{125, 5, 2, 5, 8, 4, 6, 5}	/* 38.4 MHz */
};

static const struct dpll_params per_dpll_params_1536mhz[NUM_SYS_CLKS] = {
	{64, 0, 8, 6, 12, 9, 4, 5},	/* 12 MHz   */
	{768, 12, 8, 6, 12, 9, 4, 5},	/* 13 MHz   */
	{320, 6, 8, 6, 12, 9, 4, 5},	/* 16.8 MHz */
	{40, 0, 8, 6, 12, 9, 4, 5},	/* 19.2 MHz */
	{384, 12, 8, 6, 12, 9, 4, 5},	/* 26 MHz   */
	{256, 8, 8, 6, 12, 9, 4, 5},	/* 27 MHz   */
	{20, 0, 8, 6, 12, 9, 4, 5}	/* 38.4 MHz */
};

static const struct dpll_params iva_dpll_params_1862mhz[NUM_SYS_CLKS] = {
	{931, 11, -1, -1, 4, 7, -1, -1},	/* 12 MHz   */
	{931, 12, -1, -1, 4, 7, -1, -1},	/* 13 MHz   */
	{665, 11, -1, -1, 4, 7, -1, -1},	/* 16.8 MHz */
	{727, 14, -1, -1, 4, 7, -1, -1},	/* 19.2 MHz */
	{931, 25, -1, -1, 4, 7, -1, -1},	/* 26 MHz   */
	{931, 26, -1, -1, 4, 7, -1, -1},	/* 27 MHz   */
	{412, 16, -1, -1, 4, 7, -1, -1}		/* 38.4 MHz */
};

/* ABE M & N values with sys_clk as source */
static const struct dpll_params
		abe_dpll_params_sysclk_196608khz[NUM_SYS_CLKS] = {
	{49, 5, 1, 1, -1, -1, -1, -1},	/* 12 MHz   */
	{68, 8, 1, 1, -1, -1, -1, -1},	/* 13 MHz   */
	{35, 5, 1, 1, -1, -1, -1, -1},	/* 16.8 MHz */
	{46, 8, 1, 1, -1, -1, -1, -1},	/* 19.2 MHz */
	{34, 8, 1, 1, -1, -1, -1, -1},	/* 26 MHz   */
	{29, 7, 1, 1, -1, -1, -1, -1},	/* 27 MHz   */
	{64, 24, 1, 1, -1, -1, -1, -1}	/* 38.4 MHz */
};

/* ABE M & N values with 32K clock as source */
static const struct dpll_params abe_dpll_params_32k_196608khz = {
	750, 0, 1, 1, -1, -1, -1, -1
};

static const struct dpll_params usb_dpll_params_1920mhz[NUM_SYS_CLKS] = {
	{80, 0, 2, -1, -1, -1, -1, -1},		/* 12 MHz   */
	{960, 12, 2, -1, -1, -1, -1, -1},	/* 13 MHz   */
	{400, 6, 2, -1, -1, -1, -1, -1},	/* 16.8 MHz */
	{50, 0, 2, -1, -1, -1, -1, -1},		/* 19.2 MHz */
	{480, 12, 2, -1, -1, -1, -1, -1},	/* 26 MHz   */
	{320, 8, 2, -1, -1, -1, -1, -1},	/* 27 MHz   */
	{25, 0, 2, -1, -1, -1, -1, -1}		/* 38.4 MHz */
};

void setup_post_dividers(u32 *const base, const struct dpll_params *params)
{
	struct dpll_regs *const dpll_regs = (struct dpll_regs *)base;

	/* Setup post-dividers */
	if (params->m2 >= 0)
		writel(params->m2, &dpll_regs->cm_div_m2_dpll);
	if (params->m3 >= 0)
		writel(params->m3, &dpll_regs->cm_div_m3_dpll);
	if (params->m4 >= 0)
		writel(params->m4, &dpll_regs->cm_div_m4_dpll);
	if (params->m5 >= 0)
		writel(params->m5, &dpll_regs->cm_div_m5_dpll);
	if (params->m6 >= 0)
		writel(params->m6, &dpll_regs->cm_div_m6_dpll);
	if (params->m7 >= 0)
		writel(params->m7, &dpll_regs->cm_div_m7_dpll);
}

/*
 * Lock MPU dpll
 *
 * Resulting MPU frequencies:
 * 4430 ES1.0	: 600 MHz
 * 4430 ES2.x	: 792 MHz (OPP Turbo)
 * 4460		: 920 MHz (OPP Turbo) - DCC disabled
 */
const struct dpll_params *get_mpu_dpll_params(void)
{
	u32 omap_rev, sysclk_ind;

	omap_rev = omap_revision();
	sysclk_ind = get_sys_clk_index();

	if (omap_rev == OMAP4430_ES1_0)
		return &mpu_dpll_params_1200mhz[sysclk_ind];
	else if (omap_rev < OMAP4460_ES1_0)
		return &mpu_dpll_params_1600mhz[sysclk_ind];
	else
		return &mpu_dpll_params_1400mhz[sysclk_ind];
}

const struct dpll_params *get_core_dpll_params(void)
{
	u32 sysclk_ind = get_sys_clk_index();

	switch (omap_revision()) {
	case OMAP4430_ES1_0:
		return &core_dpll_params_es1_1524mhz[sysclk_ind];
	case OMAP4430_ES2_0:
	case OMAP4430_SILICON_ID_INVALID:
		 /* safest */
		return &core_dpll_params_es2_1600mhz_ddr200mhz[sysclk_ind];
	default:
		return &core_dpll_params_1600mhz[sysclk_ind];
	}
}


const struct dpll_params *get_per_dpll_params(void)
{
	u32 sysclk_ind = get_sys_clk_index();
	return &per_dpll_params_1536mhz[sysclk_ind];
}

const struct dpll_params *get_iva_dpll_params(void)
{
	u32 sysclk_ind = get_sys_clk_index();
	return &iva_dpll_params_1862mhz[sysclk_ind];
}

const struct dpll_params *get_usb_dpll_params(void)
{
	u32 sysclk_ind = get_sys_clk_index();
	return &usb_dpll_params_1920mhz[sysclk_ind];
}

const struct dpll_params *get_abe_dpll_params(void)
{
#ifdef CONFIG_SYS_OMAP_ABE_SYSCK
	u32 sysclk_ind = get_sys_clk_index();
	return &abe_dpll_params_sysclk_196608khz[sysclk_ind];
#else
	return &abe_dpll_params_32k_196608khz;
#endif
}

/*
 * Setup the voltages for vdd_mpu, vdd_core, and vdd_iva
 * We set the maximum voltages allowed here because Smart-Reflex is not
 * enabled in bootloader. Voltage initialization in the kernel will set
 * these to the nominal values after enabling Smart-Reflex
 */
void scale_vcores(void)
{
	u32 volt, omap_rev;

	omap_vc_init(PRM_VC_I2C_CHANNEL_FREQ_KHZ);

	omap_rev = omap_revision();

	/*
	 * Scale Voltage rails:
	 * 1. VDD_CORE
	 * 3. VDD_MPU
	 * 3. VDD_IVA
	 */
	if (omap_rev < OMAP4460_ES1_0) {
		/*
		 * OMAP4430:
		 * VDD_CORE = TWL6030 VCORE3
		 * VDD_MPU = TWL6030 VCORE1
		 * VDD_IVA = TWL6030 VCORE2
		 */
		volt = 1200;
		do_scale_vcore(SMPS_REG_ADDR_VCORE3, volt);

		/*
		 * note on VDD_MPU:
		 * Setting a high voltage for Nitro mode as smart reflex is not
		 * enabled. We use the maximum possible value in the AVS range
		 * because the next higher voltage in the discrete range
		 * (code >= 0b111010) is way too high.
		 */
		volt = 1325;
		do_scale_vcore(SMPS_REG_ADDR_VCORE1, volt);
		volt = 1200;
		do_scale_vcore(SMPS_REG_ADDR_VCORE2, volt);

	} else {
		/*
		 * OMAP4460:
		 * VDD_CORE = TWL6030 VCORE1
		 * VDD_MPU = TPS62361
		 * VDD_IVA = TWL6030 VCORE2
		 */
		volt = 1200;
		do_scale_vcore(SMPS_REG_ADDR_VCORE1, volt);
		/* TPS62361 */
		volt = 1203;
		do_scale_tps62361(TPS62361_VSEL0_GPIO,
				  TPS62361_REG_ADDR_SET1, volt);
		/* VCORE 2 - supplies vdd_iva */
		volt = 1200;
		do_scale_vcore(SMPS_REG_ADDR_VCORE2, volt);
	}
}

u32 get_offset_code(u32 offset)
{
	u32 offset_code, step = 12660; /* 12.66 mV represented in uV */

	if (omap_revision() == OMAP4430_ES1_0)
		offset -= PHOENIX_SMPS_BASE_VOLT_STD_MODE_UV;
	else
		offset -= PHOENIX_SMPS_BASE_VOLT_STD_MODE_WITH_OFFSET_UV;

	offset_code = (offset + step - 1) / step;

	/* The code starts at 1 not 0 */
	return ++offset_code;
}

/*
 * Enable essential clock domains, modules and
 * do some additional special settings needed
 */
void enable_basic_clocks(void)
{
	u32 *const clk_domains_essential[] = {
		&prcm->cm_l4per_clkstctrl,
		&prcm->cm_l3init_clkstctrl,
		&prcm->cm_memif_clkstctrl,
		&prcm->cm_l4cfg_clkstctrl,
		0
	};

	u32 *const clk_modules_hw_auto_essential[] = {
		&prcm->cm_memif_emif_1_clkctrl,
		&prcm->cm_memif_emif_2_clkctrl,
		&prcm->cm_l4cfg_l4_cfg_clkctrl,
		&prcm->cm_wkup_gpio1_clkctrl,
		&prcm->cm_l4per_gpio2_clkctrl,
		&prcm->cm_l4per_gpio3_clkctrl,
		&prcm->cm_l4per_gpio4_clkctrl,
		&prcm->cm_l4per_gpio5_clkctrl,
		&prcm->cm_l4per_gpio6_clkctrl,
		&prcm->cm_l3init_usbphy_clkctrl,
		&prcm->cm_clksel_usb_60mhz,
		&prcm->cm_l3init_hsusbtll_clkctrl,
		0
	};

	u32 *const clk_modules_explicit_en_essential[] = {
		&prcm->cm_wkup_gptimer1_clkctrl,
		&prcm->cm_l3init_hsmmc1_clkctrl,
		&prcm->cm_l3init_hsmmc2_clkctrl,
		&prcm->cm_l4per_gptimer2_clkctrl,
		&prcm->cm_wkup_wdtimer2_clkctrl,
		&prcm->cm_l4per_uart3_clkctrl,
		&prcm->cm_l3init_fsusb_clkctrl,
		&prcm->cm_l3init_hsusbhost_clkctrl,
		0
	};

	/* Enable optional additional functional clock for GPIO4 */
	setbits_le32(&prcm->cm_l4per_gpio4_clkctrl,
			GPIO4_CLKCTRL_OPTFCLKEN_MASK);

	/* Enable 96 MHz clock for MMC1 & MMC2 */
	setbits_le32(&prcm->cm_l3init_hsmmc1_clkctrl,
			HSMMC_CLKCTRL_CLKSEL_MASK);
	setbits_le32(&prcm->cm_l3init_hsmmc2_clkctrl,
			HSMMC_CLKCTRL_CLKSEL_MASK);

	/* Select 32KHz clock as the source of GPTIMER1 */
	setbits_le32(&prcm->cm_wkup_gptimer1_clkctrl,
			GPTIMER1_CLKCTRL_CLKSEL_MASK);

	/* Enable optional 48M functional clock for USB  PHY */
	setbits_le32(&prcm->cm_l3init_usbphy_clkctrl,
			USBPHY_CLKCTRL_OPTFCLKEN_PHY_48M_MASK);

	do_enable_clocks(clk_domains_essential,
			 clk_modules_hw_auto_essential,
			 clk_modules_explicit_en_essential,
			 1);
}

void enable_basic_uboot_clocks(void)
{
	u32 *const clk_domains_essential[] = {
		0
	};

	u32 *const clk_modules_hw_auto_essential[] = {
		&prcm->cm_l3init_hsusbotg_clkctrl,
		&prcm->cm_l3init_usbphy_clkctrl,
		0
	};

	u32 *const clk_modules_explicit_en_essential[] = {
		&prcm->cm_l4per_mcspi1_clkctrl,
		&prcm->cm_l4per_i2c1_clkctrl,
		&prcm->cm_l4per_i2c2_clkctrl,
		&prcm->cm_l4per_i2c3_clkctrl,
		&prcm->cm_l4per_i2c4_clkctrl,
		0
	};

	do_enable_clocks(clk_domains_essential,
			 clk_modules_hw_auto_essential,
			 clk_modules_explicit_en_essential,
			 1);
}

/*
 * Enable non-essential clock domains, modules and
 * do some additional special settings needed
 */
void enable_non_essential_clocks(void)
{
	u32 *const clk_domains_non_essential[] = {
		&prcm->cm_mpu_m3_clkstctrl,
		&prcm->cm_ivahd_clkstctrl,
		&prcm->cm_dsp_clkstctrl,
		&prcm->cm_dss_clkstctrl,
		&prcm->cm_sgx_clkstctrl,
		&prcm->cm1_abe_clkstctrl,
		&prcm->cm_c2c_clkstctrl,
		&prcm->cm_cam_clkstctrl,
		&prcm->cm_dss_clkstctrl,
		&prcm->cm_sdma_clkstctrl,
		0
	};

	u32 *const clk_modules_hw_auto_non_essential[] = {
		&prcm->cm_mpu_m3_mpu_m3_clkctrl,
		&prcm->cm_ivahd_ivahd_clkctrl,
		&prcm->cm_ivahd_sl2_clkctrl,
		&prcm->cm_dsp_dsp_clkctrl,
		&prcm->cm_l3_2_gpmc_clkctrl,
		&prcm->cm_l3instr_l3_3_clkctrl,
		&prcm->cm_l3instr_l3_instr_clkctrl,
		&prcm->cm_l3instr_intrconn_wp1_clkctrl,
		&prcm->cm_l3init_hsi_clkctrl,
		&prcm->cm_l3init_hsusbtll_clkctrl,
		0
	};

	u32 *const clk_modules_explicit_en_non_essential[] = {
		&prcm->cm1_abe_aess_clkctrl,
		&prcm->cm1_abe_pdm_clkctrl,
		&prcm->cm1_abe_dmic_clkctrl,
		&prcm->cm1_abe_mcasp_clkctrl,
		&prcm->cm1_abe_mcbsp1_clkctrl,
		&prcm->cm1_abe_mcbsp2_clkctrl,
		&prcm->cm1_abe_mcbsp3_clkctrl,
		&prcm->cm1_abe_slimbus_clkctrl,
		&prcm->cm1_abe_timer5_clkctrl,
		&prcm->cm1_abe_timer6_clkctrl,
		&prcm->cm1_abe_timer7_clkctrl,
		&prcm->cm1_abe_timer8_clkctrl,
		&prcm->cm1_abe_wdt3_clkctrl,
		&prcm->cm_l4per_gptimer9_clkctrl,
		&prcm->cm_l4per_gptimer10_clkctrl,
		&prcm->cm_l4per_gptimer11_clkctrl,
		&prcm->cm_l4per_gptimer3_clkctrl,
		&prcm->cm_l4per_gptimer4_clkctrl,
		&prcm->cm_l4per_hdq1w_clkctrl,
		&prcm->cm_l4per_mcbsp4_clkctrl,
		&prcm->cm_l4per_mcspi2_clkctrl,
		&prcm->cm_l4per_mcspi3_clkctrl,
		&prcm->cm_l4per_mcspi4_clkctrl,
		&prcm->cm_l4per_mmcsd3_clkctrl,
		&prcm->cm_l4per_mmcsd4_clkctrl,
		&prcm->cm_l4per_mmcsd5_clkctrl,
		&prcm->cm_l4per_uart1_clkctrl,
		&prcm->cm_l4per_uart2_clkctrl,
		&prcm->cm_l4per_uart4_clkctrl,
		&prcm->cm_wkup_keyboard_clkctrl,
		&prcm->cm_wkup_wdtimer2_clkctrl,
		&prcm->cm_cam_iss_clkctrl,
		&prcm->cm_cam_fdif_clkctrl,
		&prcm->cm_dss_dss_clkctrl,
		&prcm->cm_sgx_sgx_clkctrl,
		&prcm->cm_l3init_hsusbhost_clkctrl,
		&prcm->cm_l3init_fsusb_clkctrl,
		0
	};

	/* Enable optional functional clock for ISS */
	setbits_le32(&prcm->cm_cam_iss_clkctrl, ISS_CLKCTRL_OPTFCLKEN_MASK);

	/* Enable all optional functional clocks of DSS */
	setbits_le32(&prcm->cm_dss_dss_clkctrl, DSS_CLKCTRL_OPTFCLKEN_MASK);

	do_enable_clocks(clk_domains_non_essential,
			 clk_modules_hw_auto_non_essential,
			 clk_modules_explicit_en_non_essential,
			 0);

	/* Put camera module in no sleep mode */
	clrsetbits_le32(&prcm->cm_cam_clkstctrl, MODULE_CLKCTRL_MODULEMODE_MASK,
			CD_CLKCTRL_CLKTRCTRL_NO_SLEEP <<
			MODULE_CLKCTRL_MODULEMODE_SHIFT);
}