arch/m68k/cpu/mcf5445x/speed.c - github/trini/u-boot - Gitiles

 /*
  *
  * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <common.h>
 #include <asm/processor.h>

 #include <asm/immap.h>
 #include <asm/io.h>

 DECLARE_GLOBAL_DATA_PTR;

 /*
  * Low Power Divider specifications
  */
 #define CLOCK_LPD_MIN		(1 << 0)	/* Divider (decoded) */
 #define CLOCK_LPD_MAX		(1 << 15)	/* Divider (decoded) */

 #define CLOCK_PLL_FVCO_MAX	540000000
 #define CLOCK_PLL_FVCO_MIN	300000000

 #define CLOCK_PLL_FSYS_MAX	266666666
 #define CLOCK_PLL_FSYS_MIN	100000000
 #define MHZ			1000000

 void clock_enter_limp(int lpdiv)
 {
 	ccm_t *ccm = (ccm_t *)MMAP_CCM;
 	int i, j;

 	/* Check bounds of divider */
 	if (lpdiv < CLOCK_LPD_MIN)
 		lpdiv = CLOCK_LPD_MIN;
 	if (lpdiv > CLOCK_LPD_MAX)
 		lpdiv = CLOCK_LPD_MAX;

 	/* Round divider down to nearest power of two */
 	for (i = 0, j = lpdiv; j != 1; j >>= 1, i++) ;

 #ifdef CONFIG_MCF5445x
 	/* Apply the divider to the system clock */
 	clrsetbits_be16(&ccm->cdr, 0x0f00, CCM_CDR_LPDIV(i));
 #endif

 	/* Enable Limp Mode */
 	setbits_be16(&ccm->misccr, CCM_MISCCR_LIMP);
 }

 /*
  * brief   Exit Limp mode
  * warning The PLL should be set and locked prior to exiting Limp mode
  */
 void clock_exit_limp(void)
 {
 	ccm_t *ccm = (ccm_t *)MMAP_CCM;
 	pll_t *pll = (pll_t *)MMAP_PLL;

 	/* Exit Limp mode */
 	clrbits_be16(&ccm->misccr, CCM_MISCCR_LIMP);

 	/* Wait for the PLL to lock */
 	while (!(in_be32(&pll->psr) & PLL_PSR_LOCK))
 		;
 }

 #ifdef CONFIG_MCF5441x
 void setup_5441x_clocks(void)
 {
 	ccm_t *ccm = (ccm_t *)MMAP_CCM;
 	pll_t *pll = (pll_t *)MMAP_PLL;
 	int temp, vco = 0, bootmod_ccr, pdr;

 	bootmod_ccr = (in_be16(&ccm->ccr) & CCM_CCR_BOOTMOD) >> 14;

 	switch (bootmod_ccr) {
 	case 0:
 		out_be32(&pll->pcr, 0x00000013);
 		out_be32(&pll->pdr, 0x00e70c61);
 		clock_exit_limp();
 		break;
 	case 2:
 		break;
 	case 3:
 		break;
 	}

 	/*Change frequency for Modelo SER1 USB host*/
 #ifdef CONFIG_LOW_MCFCLK
 	temp = in_be32(&pll->pcr);
 	temp &= ~0x3f;
 	temp |= 5;
 	out_be32(&pll->pcr, temp);

 	temp = in_be32(&pll->pdr);
 	temp &= ~0x001f0000;
 	temp |= 0x00040000;
 	out_be32(&pll->pdr, temp);
 	__asm__("tpf");
 #endif

 	setbits_be16(&ccm->misccr2, 0x02);

 	vco =  ((in_be32(&pll->pcr) & PLL_CR_FBKDIV_BITS) + 1) *
 		CONFIG_SYS_INPUT_CLKSRC;
 	gd->arch.vco_clk = vco;

 	gd->arch.inp_clk = CONFIG_SYS_INPUT_CLKSRC;	/* Input clock */

 	pdr = in_be32(&pll->pdr);
 	temp = (pdr & PLL_DR_OUTDIV1_BITS) + 1;
 	gd->cpu_clk = vco / temp;	/* cpu clock */
 	gd->arch.flb_clk = vco / temp;	/* FlexBus clock */
 	gd->arch.flb_clk >>= 1;
 	if (in_be16(ccm->misccr2) & 2)		/* fsys/4 */
 		gd->arch.flb_clk >>= 1;

 	temp = ((pdr & PLL_DR_OUTDIV2_BITS) >> 5) + 1;
 	gd->bus_clk = vco / temp;	/* bus clock */

 }
 #endif

 #ifdef CONFIG_MCF5445x
 void setup_5445x_clocks(void)
 {
 	ccm_t *ccm = (ccm_t *)MMAP_CCM;
 	pll_t *pll = (pll_t *)MMAP_PLL;
 	int pllmult_nopci[] = { 20, 10, 24, 18, 12, 6, 16, 8 };
 	int pllmult_pci[] = { 12, 6, 16, 8 };
 	int vco = 0, temp, fbtemp, pcrvalue;
 	int *pPllmult = NULL;
 	u16 fbpll_mask;
 #ifdef CONFIG_PCI
 	int bPci;
 #endif

 #ifdef CONFIG_M54455EVB
 	u8 *cpld = (u8 *)(CONFIG_SYS_CS2_BASE + 3);
 #endif
 	u8 bootmode;

 	/* To determine PCI is present or not */
 	if (((in_be16(&ccm->ccr) & CCM_CCR_360_FBCONFIG_MASK) == 0x00e0) ||
 	    ((in_be16(&ccm->ccr) & CCM_CCR_360_FBCONFIG_MASK) == 0x0060)) {
 		pPllmult = &pllmult_pci[0];
 		fbpll_mask = 3;		/* 11b */
 #ifdef CONFIG_PCI
 		bPci = 1;
 #endif
 	} else {
 		pPllmult = &pllmult_nopci[0];
 		fbpll_mask = 7;		/* 111b */
 #ifdef CONFIG_PCI
 		gd->pci_clk = 0;
 		bPci = 0;
 #endif
 	}

 #ifdef CONFIG_M54455EVB
 	bootmode = (in_8(cpld) & 0x03);

 	if (bootmode != 3) {
 		/* Temporary read from CCR- fixed fb issue, must be the same clock
 		   as pci or input clock, causing cpld/fpga read inconsistancy */
 		fbtemp = pPllmult[ccm->ccr & fbpll_mask];

 		/* Break down into small pieces, code still in flex bus */
 		pcrvalue = in_be32(&pll->pcr) & 0xFFFFF0FF;
 		temp = fbtemp - 1;
 		pcrvalue |= PLL_PCR_OUTDIV3(temp);

 		out_be32(&pll->pcr, pcrvalue);
 	}
 #endif
 #ifdef CONFIG_M54451EVB
 	/* No external logic to read the bootmode, hard coded from built */
 #ifdef CONFIG_CF_SBF
 	bootmode = 3;
 #else
 	bootmode = 2;

 	/* default value is 16 mul, set to 20 mul */
 	pcrvalue = (in_be32(&pll->pcr) & 0x00FFFFFF) | 0x14000000;
 	out_be32(&pll->pcr, pcrvalue);
 	while ((in_be32(&pll->psr) & PLL_PSR_LOCK) != PLL_PSR_LOCK)
 		;
 #endif
 #endif

 	if (bootmode == 0) {
 		/* RCON mode */
 		vco = pPllmult[ccm->rcon & fbpll_mask] * CONFIG_SYS_INPUT_CLKSRC;

 		if ((vco < CLOCK_PLL_FVCO_MIN) || (vco > CLOCK_PLL_FVCO_MAX)) {
 			/* invaild range, re-set in PCR */
 			int temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV2_MASK) >> 4) + 1;
 			int i, j, bus;

 			j = (in_be32(&pll->pcr) & 0xFF000000) >> 24;
 			for (i = j; i < 0xFF; i++) {
 				vco = i * CONFIG_SYS_INPUT_CLKSRC;
 				if (vco >= CLOCK_PLL_FVCO_MIN) {
 					bus = vco / temp;
 					if (bus <= CLOCK_PLL_FSYS_MIN - MHZ)
 						continue;
 					else
 						break;
 				}
 			}
 			pcrvalue = in_be32(&pll->pcr) & 0x00FF00FF;
 			fbtemp = ((i - 1) << 8) | ((i - 1) << 12);
 			pcrvalue |= ((i << 24) | fbtemp);

 			out_be32(&pll->pcr, pcrvalue);
 		}
 		gd->arch.vco_clk = vco;	/* Vco clock */
 	} else if (bootmode == 2) {
 		/* Normal mode */
 		vco =  ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
 		if ((vco < CLOCK_PLL_FVCO_MIN) || (vco > CLOCK_PLL_FVCO_MAX)) {
 			/* Default value */
 			pcrvalue = (in_be32(&pll->pcr) & 0x00FFFFFF);
 			pcrvalue |= pPllmult[in_be16(&ccm->ccr) & fbpll_mask] << 24;
 			out_be32(&pll->pcr, pcrvalue);
 			vco = ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
 		}
 		gd->arch.vco_clk = vco;	/* Vco clock */
 	} else if (bootmode == 3) {
 		/* serial mode */
 		vco =  ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
 		gd->arch.vco_clk = vco;	/* Vco clock */
 	}

 	if ((in_be16(&ccm->ccr) & CCM_MISCCR_LIMP) == CCM_MISCCR_LIMP) {
 		/* Limp mode */
 	} else {
 		gd->arch.inp_clk = CONFIG_SYS_INPUT_CLKSRC; /* Input clock */

 		temp = (in_be32(&pll->pcr) & PLL_PCR_OUTDIV1_MASK) + 1;
 		gd->cpu_clk = vco / temp;	/* cpu clock */

 		temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV2_MASK) >> 4) + 1;
 		gd->bus_clk = vco / temp;	/* bus clock */

 		temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV3_MASK) >> 8) + 1;
 		gd->arch.flb_clk = vco / temp;	/* FlexBus clock */

 #ifdef CONFIG_PCI
 		if (bPci) {
 			temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV4_MASK) >> 12) + 1;
 			gd->pci_clk = vco / temp;	/* PCI clock */
 		}
 #endif
 	}

 #ifdef CONFIG_SYS_I2C_FSL
 	gd->arch.i2c1_clk = gd->bus_clk;
 #endif
 }
 #endif

 /* get_clocks() fills in gd->cpu_clock and gd->bus_clk */
 int get_clocks(void)
 {
 #ifdef CONFIG_MCF5441x
 	setup_5441x_clocks();
 #endif
 #ifdef CONFIG_MCF5445x
 	setup_5445x_clocks();
 #endif

 #ifdef CONFIG_SYS_FSL_I2C
 	gd->arch.i2c1_clk = gd->bus_clk;
 #endif

 	return (0);
 }
	/*
	*
	* Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
	* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <common.h>
	#include <asm/processor.h>

	#include <asm/immap.h>
	#include <asm/io.h>

	DECLARE_GLOBAL_DATA_PTR;

	/*
	* Low Power Divider specifications
	*/
	#define CLOCK_LPD_MIN (1 << 0) /* Divider (decoded) */
	#define CLOCK_LPD_MAX (1 << 15) /* Divider (decoded) */

	#define CLOCK_PLL_FVCO_MAX 540000000
	#define CLOCK_PLL_FVCO_MIN 300000000

	#define CLOCK_PLL_FSYS_MAX 266666666
	#define CLOCK_PLL_FSYS_MIN 100000000
	#define MHZ 1000000

	void clock_enter_limp(int lpdiv)
	{
	ccm_t ccm = (ccm_t )MMAP_CCM;
	int i, j;

	/* Check bounds of divider */
	if (lpdiv < CLOCK_LPD_MIN)
	lpdiv = CLOCK_LPD_MIN;
	if (lpdiv > CLOCK_LPD_MAX)
	lpdiv = CLOCK_LPD_MAX;

	/* Round divider down to nearest power of two */
	for (i = 0, j = lpdiv; j != 1; j >>= 1, i++) ;

	#ifdef CONFIG_MCF5445x
	/* Apply the divider to the system clock */
	clrsetbits_be16(&ccm->cdr, 0x0f00, CCM_CDR_LPDIV(i));
	#endif

	/* Enable Limp Mode */
	setbits_be16(&ccm->misccr, CCM_MISCCR_LIMP);
	}

	/*
	* brief Exit Limp mode
	* warning The PLL should be set and locked prior to exiting Limp mode
	*/
	void clock_exit_limp(void)
	{
	ccm_t ccm = (ccm_t )MMAP_CCM;
	pll_t pll = (pll_t )MMAP_PLL;

	/* Exit Limp mode */
	clrbits_be16(&ccm->misccr, CCM_MISCCR_LIMP);

	/* Wait for the PLL to lock */
	while (!(in_be32(&pll->psr) & PLL_PSR_LOCK))
	;
	}

	#ifdef CONFIG_MCF5441x
	void setup_5441x_clocks(void)
	{
	ccm_t ccm = (ccm_t )MMAP_CCM;
	pll_t pll = (pll_t )MMAP_PLL;
	int temp, vco = 0, bootmod_ccr, pdr;

	bootmod_ccr = (in_be16(&ccm->ccr) & CCM_CCR_BOOTMOD) >> 14;

	switch (bootmod_ccr) {
	case 0:
	out_be32(&pll->pcr, 0x00000013);
	out_be32(&pll->pdr, 0x00e70c61);
	clock_exit_limp();
	break;
	case 2:
	break;
	case 3:
	break;
	}

	/Change frequency for Modelo SER1 USB host/
	#ifdef CONFIG_LOW_MCFCLK
	temp = in_be32(&pll->pcr);
	temp &= ~0x3f;
	temp \|= 5;
	out_be32(&pll->pcr, temp);

	temp = in_be32(&pll->pdr);
	temp &= ~0x001f0000;
	temp \|= 0x00040000;
	out_be32(&pll->pdr, temp);
	__asm__("tpf");
	#endif

	setbits_be16(&ccm->misccr2, 0x02);

	vco = ((in_be32(&pll->pcr) & PLL_CR_FBKDIV_BITS) + 1) *
	CONFIG_SYS_INPUT_CLKSRC;
	gd->arch.vco_clk = vco;

	gd->arch.inp_clk = CONFIG_SYS_INPUT_CLKSRC; /* Input clock */

	pdr = in_be32(&pll->pdr);
	temp = (pdr & PLL_DR_OUTDIV1_BITS) + 1;
	gd->cpu_clk = vco / temp; /* cpu clock */
	gd->arch.flb_clk = vco / temp; /* FlexBus clock */
	gd->arch.flb_clk >>= 1;
	if (in_be16(ccm->misccr2) & 2) /* fsys/4 */
	gd->arch.flb_clk >>= 1;

	temp = ((pdr & PLL_DR_OUTDIV2_BITS) >> 5) + 1;
	gd->bus_clk = vco / temp; /* bus clock */

	}
	#endif

	#ifdef CONFIG_MCF5445x
	void setup_5445x_clocks(void)
	{
	ccm_t ccm = (ccm_t )MMAP_CCM;
	pll_t pll = (pll_t )MMAP_PLL;
	int pllmult_nopci[] = { 20, 10, 24, 18, 12, 6, 16, 8 };
	int pllmult_pci[] = { 12, 6, 16, 8 };
	int vco = 0, temp, fbtemp, pcrvalue;
	int *pPllmult = NULL;
	u16 fbpll_mask;
	#ifdef CONFIG_PCI
	int bPci;
	#endif

	#ifdef CONFIG_M54455EVB
	u8 cpld = (u8 )(CONFIG_SYS_CS2_BASE + 3);
	#endif
	u8 bootmode;

	/* To determine PCI is present or not */
	if (((in_be16(&ccm->ccr) & CCM_CCR_360_FBCONFIG_MASK) == 0x00e0) \|\|
	((in_be16(&ccm->ccr) & CCM_CCR_360_FBCONFIG_MASK) == 0x0060)) {
	pPllmult = &pllmult_pci[0];
	fbpll_mask = 3; /* 11b */
	#ifdef CONFIG_PCI
	bPci = 1;
	#endif
	} else {
	pPllmult = &pllmult_nopci[0];
	fbpll_mask = 7; /* 111b */
	#ifdef CONFIG_PCI
	gd->pci_clk = 0;
	bPci = 0;
	#endif
	}

	#ifdef CONFIG_M54455EVB
	bootmode = (in_8(cpld) & 0x03);

	if (bootmode != 3) {
	/* Temporary read from CCR- fixed fb issue, must be the same clock
	as pci or input clock, causing cpld/fpga read inconsistancy */
	fbtemp = pPllmult[ccm->ccr & fbpll_mask];

	/* Break down into small pieces, code still in flex bus */
	pcrvalue = in_be32(&pll->pcr) & 0xFFFFF0FF;
	temp = fbtemp - 1;
	pcrvalue \|= PLL_PCR_OUTDIV3(temp);

	out_be32(&pll->pcr, pcrvalue);
	}
	#endif
	#ifdef CONFIG_M54451EVB
	/* No external logic to read the bootmode, hard coded from built */
	#ifdef CONFIG_CF_SBF
	bootmode = 3;
	#else
	bootmode = 2;

	/* default value is 16 mul, set to 20 mul */
	pcrvalue = (in_be32(&pll->pcr) & 0x00FFFFFF) \| 0x14000000;
	out_be32(&pll->pcr, pcrvalue);
	while ((in_be32(&pll->psr) & PLL_PSR_LOCK) != PLL_PSR_LOCK)
	;
	#endif
	#endif

	if (bootmode == 0) {
	/* RCON mode */
	vco = pPllmult[ccm->rcon & fbpll_mask] * CONFIG_SYS_INPUT_CLKSRC;

	if ((vco < CLOCK_PLL_FVCO_MIN) \|\| (vco > CLOCK_PLL_FVCO_MAX)) {
	/* invaild range, re-set in PCR */
	int temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV2_MASK) >> 4) + 1;
	int i, j, bus;

	j = (in_be32(&pll->pcr) & 0xFF000000) >> 24;
	for (i = j; i < 0xFF; i++) {
	vco = i * CONFIG_SYS_INPUT_CLKSRC;
	if (vco >= CLOCK_PLL_FVCO_MIN) {
	bus = vco / temp;
	if (bus <= CLOCK_PLL_FSYS_MIN - MHZ)
	continue;
	else
	break;
	}
	}
	pcrvalue = in_be32(&pll->pcr) & 0x00FF00FF;
	fbtemp = ((i - 1) << 8) \| ((i - 1) << 12);
	pcrvalue \|= ((i << 24) \| fbtemp);

	out_be32(&pll->pcr, pcrvalue);
	}
	gd->arch.vco_clk = vco; /* Vco clock */
	} else if (bootmode == 2) {
	/* Normal mode */
	vco = ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
	if ((vco < CLOCK_PLL_FVCO_MIN) \|\| (vco > CLOCK_PLL_FVCO_MAX)) {
	/* Default value */
	pcrvalue = (in_be32(&pll->pcr) & 0x00FFFFFF);
	pcrvalue \|= pPllmult[in_be16(&ccm->ccr) & fbpll_mask] << 24;
	out_be32(&pll->pcr, pcrvalue);
	vco = ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
	}
	gd->arch.vco_clk = vco; /* Vco clock */
	} else if (bootmode == 3) {
	/* serial mode */
	vco = ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
	gd->arch.vco_clk = vco; /* Vco clock */
	}

	if ((in_be16(&ccm->ccr) & CCM_MISCCR_LIMP) == CCM_MISCCR_LIMP) {
	/* Limp mode */
	} else {
	gd->arch.inp_clk = CONFIG_SYS_INPUT_CLKSRC; /* Input clock */

	temp = (in_be32(&pll->pcr) & PLL_PCR_OUTDIV1_MASK) + 1;
	gd->cpu_clk = vco / temp; /* cpu clock */

	temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV2_MASK) >> 4) + 1;
	gd->bus_clk = vco / temp; /* bus clock */

	temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV3_MASK) >> 8) + 1;
	gd->arch.flb_clk = vco / temp; /* FlexBus clock */

	#ifdef CONFIG_PCI
	if (bPci) {
	temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV4_MASK) >> 12) + 1;
	gd->pci_clk = vco / temp; /* PCI clock */
	}
	#endif
	}

	#ifdef CONFIG_SYS_I2C_FSL
	gd->arch.i2c1_clk = gd->bus_clk;
	#endif
	}
	#endif

	/* get_clocks() fills in gd->cpu_clock and gd->bus_clk */
	int get_clocks(void)
	{
	#ifdef CONFIG_MCF5441x
	setup_5441x_clocks();
	#endif
	#ifdef CONFIG_MCF5445x
	setup_5445x_clocks();
	#endif

	#ifdef CONFIG_SYS_FSL_I2C
	gd->arch.i2c1_clk = gd->bus_clk;
	#endif

	return (0);
	}