arch/powerpc/cpu/mpc85xx/speed.c - github/trini/u-boot - Gitiles

 /*
  * Copyright 2004, 2007-2011 Freescale Semiconductor, Inc.
  *
  * (C) Copyright 2003 Motorola Inc.
  * Xianghua Xiao, (X.Xiao@motorola.com)
  *
  * (C) Copyright 2000
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <common.h>
 #include <ppc_asm.tmpl>
 #include <linux/compiler.h>
 #include <asm/processor.h>
 #include <asm/io.h>

 DECLARE_GLOBAL_DATA_PTR;


 #ifndef CONFIG_SYS_FSL_NUM_CC_PLLS
 #define CONFIG_SYS_FSL_NUM_CC_PLLS	6
 #endif
 /* --------------------------------------------------------------- */

 void get_sys_info(sys_info_t *sys_info)
 {
 	volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 #ifdef CONFIG_FSL_IFC
 	struct fsl_ifc *ifc_regs = (void *)CONFIG_SYS_IFC_ADDR;
 	u32 ccr;
 #endif
 #ifdef CONFIG_FSL_CORENET
 	volatile ccsr_clk_t *clk = (void *)(CONFIG_SYS_FSL_CORENET_CLK_ADDR);
 	unsigned int cpu;
 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
 	int cc_group[12] = CONFIG_SYS_FSL_CLUSTER_CLOCKS;
 #endif

 	const u8 core_cplx_PLL[16] = {
 		[ 0] = 0,	/* CC1 PPL / 1 */
 		[ 1] = 0,	/* CC1 PPL / 2 */
 		[ 2] = 0,	/* CC1 PPL / 4 */
 		[ 4] = 1,	/* CC2 PPL / 1 */
 		[ 5] = 1,	/* CC2 PPL / 2 */
 		[ 6] = 1,	/* CC2 PPL / 4 */
 		[ 8] = 2,	/* CC3 PPL / 1 */
 		[ 9] = 2,	/* CC3 PPL / 2 */
 		[10] = 2,	/* CC3 PPL / 4 */
 		[12] = 3,	/* CC4 PPL / 1 */
 		[13] = 3,	/* CC4 PPL / 2 */
 		[14] = 3,	/* CC4 PPL / 4 */
 	};

 	const u8 core_cplx_pll_div[16] = {
 		[ 0] = 1,	/* CC1 PPL / 1 */
 		[ 1] = 2,	/* CC1 PPL / 2 */
 		[ 2] = 4,	/* CC1 PPL / 4 */
 		[ 4] = 1,	/* CC2 PPL / 1 */
 		[ 5] = 2,	/* CC2 PPL / 2 */
 		[ 6] = 4,	/* CC2 PPL / 4 */
 		[ 8] = 1,	/* CC3 PPL / 1 */
 		[ 9] = 2,	/* CC3 PPL / 2 */
 		[10] = 4,	/* CC3 PPL / 4 */
 		[12] = 1,	/* CC4 PPL / 1 */
 		[13] = 2,	/* CC4 PPL / 2 */
 		[14] = 4,	/* CC4 PPL / 4 */
 	};
 	uint i, freq_c_pll[CONFIG_SYS_FSL_NUM_CC_PLLS];
 #if !defined(CONFIG_FM_PLAT_CLK_DIV) || !defined(CONFIG_PME_PLAT_CLK_DIV)
 	uint rcw_tmp;
 #endif
 	uint ratio[CONFIG_SYS_FSL_NUM_CC_PLLS];
 	unsigned long sysclk = CONFIG_SYS_CLK_FREQ;
 	uint mem_pll_rat;

 	sys_info->freq_systembus = sysclk;
 #ifdef CONFIG_SYS_FSL_SINGLE_SOURCE_CLK
 	uint ddr_refclk_sel;
 	unsigned int porsr1_sys_clk;
 	porsr1_sys_clk = in_be32(&gur->porsr1) >> FSL_DCFG_PORSR1_SYSCLK_SHIFT
 						& FSL_DCFG_PORSR1_SYSCLK_MASK;
 	if (porsr1_sys_clk == FSL_DCFG_PORSR1_SYSCLK_DIFF)
 		sys_info->diff_sysclk = 1;
 	else
 		sys_info->diff_sysclk = 0;

 	/*
 	 * DDR_REFCLK_SEL rcw bit is used to determine if DDR PLLS
 	 * are driven by separate DDR Refclock or single source
 	 * differential clock.
 	 */
 	ddr_refclk_sel = (in_be32(&gur->rcwsr[5]) >>
 		      FSL_CORENET2_RCWSR5_DDR_REFCLK_SEL_SHIFT) &
 		      FSL_CORENET2_RCWSR5_DDR_REFCLK_SEL_MASK;
 	/*
 	 * For single source clocking, both ddrclock and sysclock
 	 * are driven by differential sysclock.
 	 */
 	if (ddr_refclk_sel == FSL_CORENET2_RCWSR5_DDR_REFCLK_SINGLE_CLK)
 		sys_info->freq_ddrbus = CONFIG_SYS_CLK_FREQ;
 	else
 #endif
 #ifdef CONFIG_DDR_CLK_FREQ
 		sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ;
 #else
 		sys_info->freq_ddrbus = sysclk;
 #endif

 	sys_info->freq_systembus *= (in_be32(&gur->rcwsr[0]) >> 25) & 0x1f;
 	mem_pll_rat = (in_be32(&gur->rcwsr[0]) >>
 			FSL_CORENET_RCWSR0_MEM_PLL_RAT_SHIFT)
 			& FSL_CORENET_RCWSR0_MEM_PLL_RAT_MASK;
 #ifdef CONFIG_SYS_FSL_ERRATUM_A007212
 	if (mem_pll_rat == 0) {
 		mem_pll_rat = (in_be32(&gur->rcwsr[0]) >>
 			FSL_CORENET_RCWSR0_MEM_PLL_RAT_RESV_SHIFT) &
 			FSL_CORENET_RCWSR0_MEM_PLL_RAT_MASK;
 	}
 #endif
 	/* T4240/T4160 Rev2.0 MEM_PLL_RAT uses a value which is half of
 	 * T4240/T4160 Rev1.0. eg. It's 12 in Rev1.0, however, for Rev2.0
 	 * it uses 6.
 	 */
 #if defined(CONFIG_PPC_T4240) || defined(CONFIG_PPC_T4160) || \
 	defined(CONFIG_PPC_T4080)
 	if (SVR_MAJ(get_svr()) >= 2)
 		mem_pll_rat *= 2;
 #endif
 	if (mem_pll_rat > 2)
 		sys_info->freq_ddrbus *= mem_pll_rat;
 	else
 		sys_info->freq_ddrbus = sys_info->freq_systembus * mem_pll_rat;

 	for (i = 0; i < CONFIG_SYS_FSL_NUM_CC_PLLS; i++) {
 		ratio[i] = (in_be32(&clk->pllcgsr[i].pllcngsr) >> 1) & 0x3f;
 		if (ratio[i] > 4)
 			freq_c_pll[i] = sysclk * ratio[i];
 		else
 			freq_c_pll[i] = sys_info->freq_systembus * ratio[i];
 	}
 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
 	/*
 	 * As per CHASSIS2 architeture total 12 clusters are posible and
 	 * Each cluster has up to 4 cores, sharing the same PLL selection.
 	 * The cluster clock assignment is SoC defined.
 	 *
 	 * Total 4 clock groups are possible with 3 PLLs each.
 	 * as per array indices, clock group A has 0, 1, 2 numbered PLLs &
 	 * clock group B has 3, 4, 6 and so on.
 	 *
 	 * Clock group A having PLL1, PLL2, PLL3, feeding cores of any cluster
 	 * depends upon the SoC architeture. Same applies to other
 	 * clock groups and clusters.
 	 *
 	 */
 	for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) {
 		int cluster = fsl_qoriq_core_to_cluster(cpu);
 		u32 c_pll_sel = (in_be32(&clk->clkcsr[cluster].clkcncsr) >> 27)
 				& 0xf;
 		u32 cplx_pll = core_cplx_PLL[c_pll_sel];
 		cplx_pll += cc_group[cluster] - 1;
 		sys_info->freq_processor[cpu] =
 			 freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel];
 	}
 #if defined(CONFIG_PPC_B4860) || defined(CONFIG_PPC_B4420) || \
 	defined(CONFIG_PPC_T2080) || defined(CONFIG_PPC_T2081)
 #define FM1_CLK_SEL	0xe0000000
 #define FM1_CLK_SHIFT	29
 #else
 #define PME_CLK_SEL	0xe0000000
 #define PME_CLK_SHIFT	29
 #define FM1_CLK_SEL	0x1c000000
 #define FM1_CLK_SHIFT	26
 #endif
 #if !defined(CONFIG_FM_PLAT_CLK_DIV) || !defined(CONFIG_PME_PLAT_CLK_DIV)
 	rcw_tmp = in_be32(&gur->rcwsr[7]);
 #endif

 #ifdef CONFIG_SYS_DPAA_PME
 #ifndef CONFIG_PME_PLAT_CLK_DIV
 	switch ((rcw_tmp & PME_CLK_SEL) >> PME_CLK_SHIFT) {
 	case 1:
 		sys_info->freq_pme = freq_c_pll[CONFIG_SYS_PME_CLK];
 		break;
 	case 2:
 		sys_info->freq_pme = freq_c_pll[CONFIG_SYS_PME_CLK] / 2;
 		break;
 	case 3:
 		sys_info->freq_pme = freq_c_pll[CONFIG_SYS_PME_CLK] / 3;
 		break;
 	case 4:
 		sys_info->freq_pme = freq_c_pll[CONFIG_SYS_PME_CLK] / 4;
 		break;
 	case 6:
 		sys_info->freq_pme = freq_c_pll[CONFIG_SYS_PME_CLK + 1] / 2;
 		break;
 	case 7:
 		sys_info->freq_pme = freq_c_pll[CONFIG_SYS_PME_CLK + 1] / 3;
 		break;
 	default:
 		printf("Error: Unknown PME clock select!\n");
 	case 0:
 		sys_info->freq_pme = sys_info->freq_systembus / 2;
 		break;

 	}
 #else
 	sys_info->freq_pme = sys_info->freq_systembus / CONFIG_SYS_PME_CLK;

 #endif
 #endif

 #ifdef CONFIG_SYS_DPAA_QBMAN
 	sys_info->freq_qman = sys_info->freq_systembus / 2;
 #endif

 #ifdef CONFIG_SYS_DPAA_FMAN
 #ifndef CONFIG_FM_PLAT_CLK_DIV
 	switch ((rcw_tmp & FM1_CLK_SEL) >> FM1_CLK_SHIFT) {
 	case 1:
 		sys_info->freq_fman[0] = freq_c_pll[CONFIG_SYS_FM1_CLK];
 		break;
 	case 2:
 		sys_info->freq_fman[0] = freq_c_pll[CONFIG_SYS_FM1_CLK] / 2;
 		break;
 	case 3:
 		sys_info->freq_fman[0] = freq_c_pll[CONFIG_SYS_FM1_CLK] / 3;
 		break;
 	case 4:
 		sys_info->freq_fman[0] = freq_c_pll[CONFIG_SYS_FM1_CLK] / 4;
 		break;
 	case 5:
 		sys_info->freq_fman[0] = sys_info->freq_systembus;
 		break;
 	case 6:
 		sys_info->freq_fman[0] = freq_c_pll[CONFIG_SYS_FM1_CLK + 1] / 2;
 		break;
 	case 7:
 		sys_info->freq_fman[0] = freq_c_pll[CONFIG_SYS_FM1_CLK + 1] / 3;
 		break;
 	default:
 		printf("Error: Unknown FMan1 clock select!\n");
 	case 0:
 		sys_info->freq_fman[0] = sys_info->freq_systembus / 2;
 		break;
 	}
 #if (CONFIG_SYS_NUM_FMAN) == 2
 #ifdef CONFIG_SYS_FM2_CLK
 #define FM2_CLK_SEL	0x00000038
 #define FM2_CLK_SHIFT	3
 	rcw_tmp = in_be32(&gur->rcwsr[15]);
 	switch ((rcw_tmp & FM2_CLK_SEL) >> FM2_CLK_SHIFT) {
 	case 1:
 		sys_info->freq_fman[1] = freq_c_pll[CONFIG_SYS_FM2_CLK + 1];
 		break;
 	case 2:
 		sys_info->freq_fman[1] = freq_c_pll[CONFIG_SYS_FM2_CLK + 1] / 2;
 		break;
 	case 3:
 		sys_info->freq_fman[1] = freq_c_pll[CONFIG_SYS_FM2_CLK + 1] / 3;
 		break;
 	case 4:
 		sys_info->freq_fman[1] = freq_c_pll[CONFIG_SYS_FM2_CLK + 1] / 4;
 		break;
 	case 5:
 		sys_info->freq_fman[1] = sys_info->freq_systembus;
 		break;
 	case 6:
 		sys_info->freq_fman[1] = freq_c_pll[CONFIG_SYS_FM2_CLK] / 2;
 		break;
 	case 7:
 		sys_info->freq_fman[1] = freq_c_pll[CONFIG_SYS_FM2_CLK] / 3;
 		break;
 	default:
 		printf("Error: Unknown FMan2 clock select!\n");
 	case 0:
 		sys_info->freq_fman[1] = sys_info->freq_systembus / 2;
 		break;
 	}
 #endif
 #endif	/* CONFIG_SYS_NUM_FMAN == 2 */
 #else
 	sys_info->freq_fman[0] = sys_info->freq_systembus / CONFIG_SYS_FM1_CLK;
 #endif
 #endif

 #else /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */

 	for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) {
 		u32 c_pll_sel = (in_be32(&clk->clkcsr[cpu].clkcncsr) >> 27)
 				& 0xf;
 		u32 cplx_pll = core_cplx_PLL[c_pll_sel];

 		sys_info->freq_processor[cpu] =
 			 freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel];
 	}
 #define PME_CLK_SEL	0x80000000
 #define FM1_CLK_SEL	0x40000000
 #define FM2_CLK_SEL	0x20000000
 #define HWA_ASYNC_DIV	0x04000000
 #if (CONFIG_SYS_FSL_NUM_CC_PLLS == 2)
 #define HWA_CC_PLL	1
 #elif (CONFIG_SYS_FSL_NUM_CC_PLLS == 3)
 #define HWA_CC_PLL	2
 #elif (CONFIG_SYS_FSL_NUM_CC_PLLS == 4)
 #define HWA_CC_PLL	2
 #else
 #error CONFIG_SYS_FSL_NUM_CC_PLLS not set or unknown case
 #endif
 	rcw_tmp = in_be32(&gur->rcwsr[7]);

 #ifdef CONFIG_SYS_DPAA_PME
 	if (rcw_tmp & PME_CLK_SEL) {
 		if (rcw_tmp & HWA_ASYNC_DIV)
 			sys_info->freq_pme = freq_c_pll[HWA_CC_PLL] / 4;
 		else
 			sys_info->freq_pme = freq_c_pll[HWA_CC_PLL] / 2;
 	} else {
 		sys_info->freq_pme = sys_info->freq_systembus / 2;
 	}
 #endif

 #ifdef CONFIG_SYS_DPAA_FMAN
 	if (rcw_tmp & FM1_CLK_SEL) {
 		if (rcw_tmp & HWA_ASYNC_DIV)
 			sys_info->freq_fman[0] = freq_c_pll[HWA_CC_PLL] / 4;
 		else
 			sys_info->freq_fman[0] = freq_c_pll[HWA_CC_PLL] / 2;
 	} else {
 		sys_info->freq_fman[0] = sys_info->freq_systembus / 2;
 	}
 #if (CONFIG_SYS_NUM_FMAN) == 2
 	if (rcw_tmp & FM2_CLK_SEL) {
 		if (rcw_tmp & HWA_ASYNC_DIV)
 			sys_info->freq_fman[1] = freq_c_pll[HWA_CC_PLL] / 4;
 		else
 			sys_info->freq_fman[1] = freq_c_pll[HWA_CC_PLL] / 2;
 	} else {
 		sys_info->freq_fman[1] = sys_info->freq_systembus / 2;
 	}
 #endif
 #endif

 #ifdef CONFIG_SYS_DPAA_QBMAN
 	sys_info->freq_qman = sys_info->freq_systembus / 2;
 #endif

 #endif /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */

 #ifdef CONFIG_U_QE
 	sys_info->freq_qe =  sys_info->freq_systembus / 2;
 #endif

 #else /* CONFIG_FSL_CORENET */
 	uint plat_ratio, e500_ratio, half_freq_systembus;
 	int i;
 #ifdef CONFIG_QE
 	__maybe_unused u32 qe_ratio;
 #endif

 	plat_ratio = (gur->porpllsr) & 0x0000003e;
 	plat_ratio >>= 1;
 	sys_info->freq_systembus = plat_ratio * CONFIG_SYS_CLK_FREQ;

 	/* Divide before multiply to avoid integer
 	 * overflow for processor speeds above 2GHz */
 	half_freq_systembus = sys_info->freq_systembus/2;
 	for (i = 0; i < cpu_numcores(); i++) {
 		e500_ratio = ((gur->porpllsr) >> (i * 8 + 16)) & 0x3f;
 		sys_info->freq_processor[i] = e500_ratio * half_freq_systembus;
 	}

 	/* Note: freq_ddrbus is the MCLK frequency, not the data rate. */
 	sys_info->freq_ddrbus = sys_info->freq_systembus;

 #ifdef CONFIG_DDR_CLK_FREQ
 	{
 		u32 ddr_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_DDR_RATIO)
 			>> MPC85xx_PORPLLSR_DDR_RATIO_SHIFT;
 		if (ddr_ratio != 0x7)
 			sys_info->freq_ddrbus = ddr_ratio * CONFIG_DDR_CLK_FREQ;
 	}
 #endif

 #ifdef CONFIG_QE
 #if defined(CONFIG_P1012) || defined(CONFIG_P1021) || defined(CONFIG_P1025)
 	sys_info->freq_qe =  sys_info->freq_systembus;
 #else
 	qe_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_QE_RATIO)
 			>> MPC85xx_PORPLLSR_QE_RATIO_SHIFT;
 	sys_info->freq_qe = qe_ratio * CONFIG_SYS_CLK_FREQ;
 #endif
 #endif

 #ifdef CONFIG_SYS_DPAA_FMAN
 		sys_info->freq_fman[0] = sys_info->freq_systembus;
 #endif

 #endif /* CONFIG_FSL_CORENET */

 #if defined(CONFIG_FSL_LBC)
 	uint lcrr_div;
 #if defined(CONFIG_SYS_LBC_LCRR)
 	/* We will program LCRR to this value later */
 	lcrr_div = CONFIG_SYS_LBC_LCRR & LCRR_CLKDIV;
 #else
 	lcrr_div = in_be32(&(LBC_BASE_ADDR)->lcrr) & LCRR_CLKDIV;
 #endif
 	if (lcrr_div == 2 || lcrr_div == 4 || lcrr_div == 8) {
 #if defined(CONFIG_FSL_CORENET)
 		/* If this is corenet based SoC, bit-representation
 		 * for four times the clock divider values.
 		 */
 		lcrr_div *= 4;
 #elif !defined(CONFIG_MPC8540) && !defined(CONFIG_MPC8541) && \
     !defined(CONFIG_MPC8555) && !defined(CONFIG_MPC8560)
 		/*
 		 * Yes, the entire PQ38 family use the same
 		 * bit-representation for twice the clock divider values.
 		 */
 		lcrr_div *= 2;
 #endif
 		sys_info->freq_localbus = sys_info->freq_systembus / lcrr_div;
 	} else {
 		/* In case anyone cares what the unknown value is */
 		sys_info->freq_localbus = lcrr_div;
 	}
 #endif

 #if defined(CONFIG_FSL_IFC)
 	ccr = in_be32(&ifc_regs->ifc_ccr);
 	ccr = ((ccr & IFC_CCR_CLK_DIV_MASK) >> IFC_CCR_CLK_DIV_SHIFT) + 1;

 	sys_info->freq_localbus = sys_info->freq_systembus / ccr;
 #endif
 }


 int get_clocks (void)
 {
 	sys_info_t sys_info;
 #ifdef CONFIG_MPC8544
 	volatile ccsr_gur_t *gur = (void *) CONFIG_SYS_MPC85xx_GUTS_ADDR;
 #endif
 #if defined(CONFIG_CPM2)
 	volatile ccsr_cpm_t *cpm = (ccsr_cpm_t *)CONFIG_SYS_MPC85xx_CPM_ADDR;
 	uint sccr, dfbrg;

 	/* set VCO = 4 * BRG */
 	cpm->im_cpm_intctl.sccr &= 0xfffffffc;
 	sccr = cpm->im_cpm_intctl.sccr;
 	dfbrg = (sccr & SCCR_DFBRG_MSK) >> SCCR_DFBRG_SHIFT;
 #endif
 	get_sys_info (&sys_info);
 	gd->cpu_clk = sys_info.freq_processor[0];
 	gd->bus_clk = sys_info.freq_systembus;
 	gd->mem_clk = sys_info.freq_ddrbus;
 	gd->arch.lbc_clk = sys_info.freq_localbus;

 #ifdef CONFIG_QE
 	gd->arch.qe_clk = sys_info.freq_qe;
 	gd->arch.brg_clk = gd->arch.qe_clk / 2;
 #endif
 	/*
 	 * The base clock for I2C depends on the actual SOC.  Unfortunately,
 	 * there is no pattern that can be used to determine the frequency, so
 	 * the only choice is to look up the actual SOC number and use the value
 	 * for that SOC. This information is taken from application note
 	 * AN2919.
 	 */
 #if defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
 	defined(CONFIG_MPC8560) || defined(CONFIG_MPC8555) || \
 	defined(CONFIG_P1022)
 	gd->arch.i2c1_clk = sys_info.freq_systembus;
 #elif defined(CONFIG_MPC8544)
 	/*
 	 * On the 8544, the I2C clock is the same as the SEC clock.  This can be
 	 * either CCB/2 or CCB/3, depending on the value of cfg_sec_freq. See
 	 * 4.4.3.3 of the 8544 RM.  Note that this might actually work for all
 	 * 85xx, but only the 8544 has cfg_sec_freq, so it's unknown if the
 	 * PORDEVSR2_SEC_CFG bit is 0 on all 85xx boards that are not an 8544.
 	 */
 	if (gur->pordevsr2 & MPC85xx_PORDEVSR2_SEC_CFG)
 		gd->arch.i2c1_clk = sys_info.freq_systembus / 3;
 	else
 		gd->arch.i2c1_clk = sys_info.freq_systembus / 2;
 #else
 	/* Most 85xx SOCs use CCB/2, so this is the default behavior. */
 	gd->arch.i2c1_clk = sys_info.freq_systembus / 2;
 #endif
 	gd->arch.i2c2_clk = gd->arch.i2c1_clk;

 #if defined(CONFIG_FSL_ESDHC)
 #if defined(CONFIG_MPC8569) || defined(CONFIG_P1010) ||\
        defined(CONFIG_P1014)
 	gd->arch.sdhc_clk = gd->bus_clk;
 #else
 	gd->arch.sdhc_clk = gd->bus_clk / 2;
 #endif
 #endif /* defined(CONFIG_FSL_ESDHC) */

 #if defined(CONFIG_CPM2)
 	gd->arch.vco_out = 2*sys_info.freq_systembus;
 	gd->arch.cpm_clk = gd->arch.vco_out / 2;
 	gd->arch.scc_clk = gd->arch.vco_out / 4;
 	gd->arch.brg_clk = gd->arch.vco_out / (1 << (2 * (dfbrg + 1)));
 #endif

 	if(gd->cpu_clk != 0) return (0);
 	else return (1);
 }


 /********************************************
  * get_bus_freq
  * return system bus freq in Hz
  *********************************************/
 ulong get_bus_freq (ulong dummy)
 {
 	return gd->bus_clk;
 }

 /********************************************
  * get_ddr_freq
  * return ddr bus freq in Hz
  *********************************************/
 ulong get_ddr_freq (ulong dummy)
 {
 	return gd->mem_clk;
 }
	/*
	* Copyright 2004, 2007-2011 Freescale Semiconductor, Inc.
	*
	* (C) Copyright 2003 Motorola Inc.
	* Xianghua Xiao, (X.Xiao@motorola.com)
	*
	* (C) Copyright 2000
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <common.h>
	#include <ppc_asm.tmpl>
	#include <linux/compiler.h>
	#include <asm/processor.h>
	#include <asm/io.h>

	DECLARE_GLOBAL_DATA_PTR;


	#ifndef CONFIG_SYS_FSL_NUM_CC_PLLS
	#define CONFIG_SYS_FSL_NUM_CC_PLLS 6
	#endif
	/* --------------------------------------------------------------- */

	void get_sys_info(sys_info_t *sys_info)
	{
	volatile ccsr_gur_t gur = (void )(CONFIG_SYS_MPC85xx_GUTS_ADDR);
	#ifdef CONFIG_FSL_IFC
	struct fsl_ifc ifc_regs = (void )CONFIG_SYS_IFC_ADDR;
	u32 ccr;
	#endif
	#ifdef CONFIG_FSL_CORENET
	volatile ccsr_clk_t clk = (void )(CONFIG_SYS_FSL_CORENET_CLK_ADDR);
	unsigned int cpu;
	#ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
	int cc_group[12] = CONFIG_SYS_FSL_CLUSTER_CLOCKS;
	#endif

	const u8 core_cplx_PLL[16] = {
	[ 0] = 0, /* CC1 PPL / 1 */
	[ 1] = 0, /* CC1 PPL / 2 */
	[ 2] = 0, /* CC1 PPL / 4 */
	[ 4] = 1, /* CC2 PPL / 1 */
	[ 5] = 1, /* CC2 PPL / 2 */
	[ 6] = 1, /* CC2 PPL / 4 */
	[ 8] = 2, /* CC3 PPL / 1 */
	[ 9] = 2, /* CC3 PPL / 2 */
	[10] = 2, /* CC3 PPL / 4 */
	[12] = 3, /* CC4 PPL / 1 */
	[13] = 3, /* CC4 PPL / 2 */
	[14] = 3, /* CC4 PPL / 4 */
	};

	const u8 core_cplx_pll_div[16] = {
	[ 0] = 1, /* CC1 PPL / 1 */
	[ 1] = 2, /* CC1 PPL / 2 */
	[ 2] = 4, /* CC1 PPL / 4 */
	[ 4] = 1, /* CC2 PPL / 1 */
	[ 5] = 2, /* CC2 PPL / 2 */
	[ 6] = 4, /* CC2 PPL / 4 */
	[ 8] = 1, /* CC3 PPL / 1 */
	[ 9] = 2, /* CC3 PPL / 2 */
	[10] = 4, /* CC3 PPL / 4 */
	[12] = 1, /* CC4 PPL / 1 */
	[13] = 2, /* CC4 PPL / 2 */
	[14] = 4, /* CC4 PPL / 4 */
	};
	uint i, freq_c_pll[CONFIG_SYS_FSL_NUM_CC_PLLS];
	#if !defined(CONFIG_FM_PLAT_CLK_DIV) \|\| !defined(CONFIG_PME_PLAT_CLK_DIV)
	uint rcw_tmp;
	#endif
	uint ratio[CONFIG_SYS_FSL_NUM_CC_PLLS];
	unsigned long sysclk = CONFIG_SYS_CLK_FREQ;
	uint mem_pll_rat;

	sys_info->freq_systembus = sysclk;
	#ifdef CONFIG_SYS_FSL_SINGLE_SOURCE_CLK
	uint ddr_refclk_sel;
	unsigned int porsr1_sys_clk;
	porsr1_sys_clk = in_be32(&gur->porsr1) >> FSL_DCFG_PORSR1_SYSCLK_SHIFT
	& FSL_DCFG_PORSR1_SYSCLK_MASK;
	if (porsr1_sys_clk == FSL_DCFG_PORSR1_SYSCLK_DIFF)
	sys_info->diff_sysclk = 1;
	else
	sys_info->diff_sysclk = 0;

	/*
	* DDR_REFCLK_SEL rcw bit is used to determine if DDR PLLS
	* are driven by separate DDR Refclock or single source
	* differential clock.
	*/
	ddr_refclk_sel = (in_be32(&gur->rcwsr[5]) >>
	FSL_CORENET2_RCWSR5_DDR_REFCLK_SEL_SHIFT) &
	FSL_CORENET2_RCWSR5_DDR_REFCLK_SEL_MASK;
	/*
	* For single source clocking, both ddrclock and sysclock
	* are driven by differential sysclock.
	*/
	if (ddr_refclk_sel == FSL_CORENET2_RCWSR5_DDR_REFCLK_SINGLE_CLK)
	sys_info->freq_ddrbus = CONFIG_SYS_CLK_FREQ;
	else
	#endif
	#ifdef CONFIG_DDR_CLK_FREQ
	sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ;
	#else
	sys_info->freq_ddrbus = sysclk;
	#endif

	sys_info->freq_systembus *= (in_be32(&gur->rcwsr[0]) >> 25) & 0x1f;
	mem_pll_rat = (in_be32(&gur->rcwsr[0]) >>
	FSL_CORENET_RCWSR0_MEM_PLL_RAT_SHIFT)
	& FSL_CORENET_RCWSR0_MEM_PLL_RAT_MASK;
	#ifdef CONFIG_SYS_FSL_ERRATUM_A007212
	if (mem_pll_rat == 0) {
	mem_pll_rat = (in_be32(&gur->rcwsr[0]) >>
	FSL_CORENET_RCWSR0_MEM_PLL_RAT_RESV_SHIFT) &
	FSL_CORENET_RCWSR0_MEM_PLL_RAT_MASK;
	}
	#endif
	/* T4240/T4160 Rev2.0 MEM_PLL_RAT uses a value which is half of
	* T4240/T4160 Rev1.0. eg. It's 12 in Rev1.0, however, for Rev2.0
	* it uses 6.
	*/
	#if defined(CONFIG_PPC_T4240) \|\| defined(CONFIG_PPC_T4160) \|\| \
	defined(CONFIG_PPC_T4080)
	if (SVR_MAJ(get_svr()) >= 2)
	mem_pll_rat *= 2;
	#endif
	if (mem_pll_rat > 2)
	sys_info->freq_ddrbus *= mem_pll_rat;
	else
	sys_info->freq_ddrbus = sys_info->freq_systembus * mem_pll_rat;

	for (i = 0; i < CONFIG_SYS_FSL_NUM_CC_PLLS; i++) {
	ratio[i] = (in_be32(&clk->pllcgsr[i].pllcngsr) >> 1) & 0x3f;
	if (ratio[i] > 4)
	freq_c_pll[i] = sysclk * ratio[i];
	else
	freq_c_pll[i] = sys_info->freq_systembus * ratio[i];
	}
	#ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
	/*
	* As per CHASSIS2 architeture total 12 clusters are posible and
	* Each cluster has up to 4 cores, sharing the same PLL selection.
	* The cluster clock assignment is SoC defined.
	*
	* Total 4 clock groups are possible with 3 PLLs each.
	* as per array indices, clock group A has 0, 1, 2 numbered PLLs &
	* clock group B has 3, 4, 6 and so on.
	*
	* Clock group A having PLL1, PLL2, PLL3, feeding cores of any cluster
	* depends upon the SoC architeture. Same applies to other
	* clock groups and clusters.
	*
	*/
	for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) {
	int cluster = fsl_qoriq_core_to_cluster(cpu);
	u32 c_pll_sel = (in_be32(&clk->clkcsr[cluster].clkcncsr) >> 27)
	& 0xf;
	u32 cplx_pll = core_cplx_PLL[c_pll_sel];
	cplx_pll += cc_group[cluster] - 1;
	sys_info->freq_processor[cpu] =
	freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel];
	}
	#if defined(CONFIG_PPC_B4860) \|\| defined(CONFIG_PPC_B4420) \|\| \
	defined(CONFIG_PPC_T2080) \|\| defined(CONFIG_PPC_T2081)
	#define FM1_CLK_SEL 0xe0000000
	#define FM1_CLK_SHIFT 29
	#else
	#define PME_CLK_SEL 0xe0000000
	#define PME_CLK_SHIFT 29
	#define FM1_CLK_SEL 0x1c000000
	#define FM1_CLK_SHIFT 26
	#endif
	#if !defined(CONFIG_FM_PLAT_CLK_DIV) \|\| !defined(CONFIG_PME_PLAT_CLK_DIV)
	rcw_tmp = in_be32(&gur->rcwsr[7]);
	#endif

	#ifdef CONFIG_SYS_DPAA_PME
	#ifndef CONFIG_PME_PLAT_CLK_DIV
	switch ((rcw_tmp & PME_CLK_SEL) >> PME_CLK_SHIFT) {
	case 1:
	sys_info->freq_pme = freq_c_pll[CONFIG_SYS_PME_CLK];
	break;
	case 2:
	sys_info->freq_pme = freq_c_pll[CONFIG_SYS_PME_CLK] / 2;
	break;
	case 3:
	sys_info->freq_pme = freq_c_pll[CONFIG_SYS_PME_CLK] / 3;
	break;
	case 4:
	sys_info->freq_pme = freq_c_pll[CONFIG_SYS_PME_CLK] / 4;
	break;
	case 6:
	sys_info->freq_pme = freq_c_pll[CONFIG_SYS_PME_CLK + 1] / 2;
	break;
	case 7:
	sys_info->freq_pme = freq_c_pll[CONFIG_SYS_PME_CLK + 1] / 3;
	break;
	default:
	printf("Error: Unknown PME clock select!\n");
	case 0:
	sys_info->freq_pme = sys_info->freq_systembus / 2;
	break;

	}
	#else
	sys_info->freq_pme = sys_info->freq_systembus / CONFIG_SYS_PME_CLK;

	#endif
	#endif

	#ifdef CONFIG_SYS_DPAA_QBMAN
	sys_info->freq_qman = sys_info->freq_systembus / 2;
	#endif

	#ifdef CONFIG_SYS_DPAA_FMAN
	#ifndef CONFIG_FM_PLAT_CLK_DIV
	switch ((rcw_tmp & FM1_CLK_SEL) >> FM1_CLK_SHIFT) {
	case 1:
	sys_info->freq_fman[0] = freq_c_pll[CONFIG_SYS_FM1_CLK];
	break;
	case 2:
	sys_info->freq_fman[0] = freq_c_pll[CONFIG_SYS_FM1_CLK] / 2;
	break;
	case 3:
	sys_info->freq_fman[0] = freq_c_pll[CONFIG_SYS_FM1_CLK] / 3;
	break;
	case 4:
	sys_info->freq_fman[0] = freq_c_pll[CONFIG_SYS_FM1_CLK] / 4;
	break;
	case 5:
	sys_info->freq_fman[0] = sys_info->freq_systembus;
	break;
	case 6:
	sys_info->freq_fman[0] = freq_c_pll[CONFIG_SYS_FM1_CLK + 1] / 2;
	break;
	case 7:
	sys_info->freq_fman[0] = freq_c_pll[CONFIG_SYS_FM1_CLK + 1] / 3;
	break;
	default:
	printf("Error: Unknown FMan1 clock select!\n");
	case 0:
	sys_info->freq_fman[0] = sys_info->freq_systembus / 2;
	break;
	}
	#if (CONFIG_SYS_NUM_FMAN) == 2
	#ifdef CONFIG_SYS_FM2_CLK
	#define FM2_CLK_SEL 0x00000038
	#define FM2_CLK_SHIFT 3
	rcw_tmp = in_be32(&gur->rcwsr[15]);
	switch ((rcw_tmp & FM2_CLK_SEL) >> FM2_CLK_SHIFT) {
	case 1:
	sys_info->freq_fman[1] = freq_c_pll[CONFIG_SYS_FM2_CLK + 1];
	break;
	case 2:
	sys_info->freq_fman[1] = freq_c_pll[CONFIG_SYS_FM2_CLK + 1] / 2;
	break;
	case 3:
	sys_info->freq_fman[1] = freq_c_pll[CONFIG_SYS_FM2_CLK + 1] / 3;
	break;
	case 4:
	sys_info->freq_fman[1] = freq_c_pll[CONFIG_SYS_FM2_CLK + 1] / 4;
	break;
	case 5:
	sys_info->freq_fman[1] = sys_info->freq_systembus;
	break;
	case 6:
	sys_info->freq_fman[1] = freq_c_pll[CONFIG_SYS_FM2_CLK] / 2;
	break;
	case 7:
	sys_info->freq_fman[1] = freq_c_pll[CONFIG_SYS_FM2_CLK] / 3;
	break;
	default:
	printf("Error: Unknown FMan2 clock select!\n");
	case 0:
	sys_info->freq_fman[1] = sys_info->freq_systembus / 2;
	break;
	}
	#endif
	#endif /* CONFIG_SYS_NUM_FMAN == 2 */
	#else
	sys_info->freq_fman[0] = sys_info->freq_systembus / CONFIG_SYS_FM1_CLK;
	#endif
	#endif

	#else /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */

	for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) {
	u32 c_pll_sel = (in_be32(&clk->clkcsr[cpu].clkcncsr) >> 27)
	& 0xf;
	u32 cplx_pll = core_cplx_PLL[c_pll_sel];

	sys_info->freq_processor[cpu] =
	freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel];
	}
	#define PME_CLK_SEL 0x80000000
	#define FM1_CLK_SEL 0x40000000
	#define FM2_CLK_SEL 0x20000000
	#define HWA_ASYNC_DIV 0x04000000
	#if (CONFIG_SYS_FSL_NUM_CC_PLLS == 2)
	#define HWA_CC_PLL 1
	#elif (CONFIG_SYS_FSL_NUM_CC_PLLS == 3)
	#define HWA_CC_PLL 2
	#elif (CONFIG_SYS_FSL_NUM_CC_PLLS == 4)
	#define HWA_CC_PLL 2
	#else
	#error CONFIG_SYS_FSL_NUM_CC_PLLS not set or unknown case
	#endif
	rcw_tmp = in_be32(&gur->rcwsr[7]);

	#ifdef CONFIG_SYS_DPAA_PME
	if (rcw_tmp & PME_CLK_SEL) {
	if (rcw_tmp & HWA_ASYNC_DIV)
	sys_info->freq_pme = freq_c_pll[HWA_CC_PLL] / 4;
	else
	sys_info->freq_pme = freq_c_pll[HWA_CC_PLL] / 2;
	} else {
	sys_info->freq_pme = sys_info->freq_systembus / 2;
	}
	#endif

	#ifdef CONFIG_SYS_DPAA_FMAN
	if (rcw_tmp & FM1_CLK_SEL) {
	if (rcw_tmp & HWA_ASYNC_DIV)
	sys_info->freq_fman[0] = freq_c_pll[HWA_CC_PLL] / 4;
	else
	sys_info->freq_fman[0] = freq_c_pll[HWA_CC_PLL] / 2;
	} else {
	sys_info->freq_fman[0] = sys_info->freq_systembus / 2;
	}
	#if (CONFIG_SYS_NUM_FMAN) == 2
	if (rcw_tmp & FM2_CLK_SEL) {
	if (rcw_tmp & HWA_ASYNC_DIV)
	sys_info->freq_fman[1] = freq_c_pll[HWA_CC_PLL] / 4;
	else
	sys_info->freq_fman[1] = freq_c_pll[HWA_CC_PLL] / 2;
	} else {
	sys_info->freq_fman[1] = sys_info->freq_systembus / 2;
	}
	#endif
	#endif

	#ifdef CONFIG_SYS_DPAA_QBMAN
	sys_info->freq_qman = sys_info->freq_systembus / 2;
	#endif

	#endif /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */

	#ifdef CONFIG_U_QE
	sys_info->freq_qe = sys_info->freq_systembus / 2;
	#endif

	#else /* CONFIG_FSL_CORENET */
	uint plat_ratio, e500_ratio, half_freq_systembus;
	int i;
	#ifdef CONFIG_QE
	__maybe_unused u32 qe_ratio;
	#endif

	plat_ratio = (gur->porpllsr) & 0x0000003e;
	plat_ratio >>= 1;
	sys_info->freq_systembus = plat_ratio * CONFIG_SYS_CLK_FREQ;

	/* Divide before multiply to avoid integer
	* overflow for processor speeds above 2GHz */
	half_freq_systembus = sys_info->freq_systembus/2;
	for (i = 0; i < cpu_numcores(); i++) {
	e500_ratio = ((gur->porpllsr) >> (i * 8 + 16)) & 0x3f;
	sys_info->freq_processor[i] = e500_ratio * half_freq_systembus;
	}

	/* Note: freq_ddrbus is the MCLK frequency, not the data rate. */
	sys_info->freq_ddrbus = sys_info->freq_systembus;

	#ifdef CONFIG_DDR_CLK_FREQ
	{
	u32 ddr_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_DDR_RATIO)
	>> MPC85xx_PORPLLSR_DDR_RATIO_SHIFT;
	if (ddr_ratio != 0x7)
	sys_info->freq_ddrbus = ddr_ratio * CONFIG_DDR_CLK_FREQ;
	}
	#endif

	#ifdef CONFIG_QE
	#if defined(CONFIG_P1012) \|\| defined(CONFIG_P1021) \|\| defined(CONFIG_P1025)
	sys_info->freq_qe = sys_info->freq_systembus;
	#else
	qe_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_QE_RATIO)
	>> MPC85xx_PORPLLSR_QE_RATIO_SHIFT;
	sys_info->freq_qe = qe_ratio * CONFIG_SYS_CLK_FREQ;
	#endif
	#endif

	#ifdef CONFIG_SYS_DPAA_FMAN
	sys_info->freq_fman[0] = sys_info->freq_systembus;
	#endif

	#endif /* CONFIG_FSL_CORENET */

	#if defined(CONFIG_FSL_LBC)
	uint lcrr_div;
	#if defined(CONFIG_SYS_LBC_LCRR)
	/* We will program LCRR to this value later */
	lcrr_div = CONFIG_SYS_LBC_LCRR & LCRR_CLKDIV;
	#else
	lcrr_div = in_be32(&(LBC_BASE_ADDR)->lcrr) & LCRR_CLKDIV;
	#endif
	if (lcrr_div == 2 \|\| lcrr_div == 4 \|\| lcrr_div == 8) {
	#if defined(CONFIG_FSL_CORENET)
	/* If this is corenet based SoC, bit-representation
	* for four times the clock divider values.
	*/
	lcrr_div *= 4;
	#elif !defined(CONFIG_MPC8540) && !defined(CONFIG_MPC8541) && \
	!defined(CONFIG_MPC8555) && !defined(CONFIG_MPC8560)
	/*
	* Yes, the entire PQ38 family use the same
	* bit-representation for twice the clock divider values.
	*/
	lcrr_div *= 2;
	#endif
	sys_info->freq_localbus = sys_info->freq_systembus / lcrr_div;
	} else {
	/* In case anyone cares what the unknown value is */
	sys_info->freq_localbus = lcrr_div;
	}
	#endif

	#if defined(CONFIG_FSL_IFC)
	ccr = in_be32(&ifc_regs->ifc_ccr);
	ccr = ((ccr & IFC_CCR_CLK_DIV_MASK) >> IFC_CCR_CLK_DIV_SHIFT) + 1;

	sys_info->freq_localbus = sys_info->freq_systembus / ccr;
	#endif
	}


	int get_clocks (void)
	{
	sys_info_t sys_info;
	#ifdef CONFIG_MPC8544
	volatile ccsr_gur_t gur = (void ) CONFIG_SYS_MPC85xx_GUTS_ADDR;
	#endif
	#if defined(CONFIG_CPM2)
	volatile ccsr_cpm_t cpm = (ccsr_cpm_t )CONFIG_SYS_MPC85xx_CPM_ADDR;
	uint sccr, dfbrg;

	/* set VCO = 4 * BRG */
	cpm->im_cpm_intctl.sccr &= 0xfffffffc;
	sccr = cpm->im_cpm_intctl.sccr;
	dfbrg = (sccr & SCCR_DFBRG_MSK) >> SCCR_DFBRG_SHIFT;
	#endif
	get_sys_info (&sys_info);
	gd->cpu_clk = sys_info.freq_processor[0];
	gd->bus_clk = sys_info.freq_systembus;
	gd->mem_clk = sys_info.freq_ddrbus;
	gd->arch.lbc_clk = sys_info.freq_localbus;

	#ifdef CONFIG_QE
	gd->arch.qe_clk = sys_info.freq_qe;
	gd->arch.brg_clk = gd->arch.qe_clk / 2;
	#endif
	/*
	* The base clock for I2C depends on the actual SOC. Unfortunately,
	* there is no pattern that can be used to determine the frequency, so
	* the only choice is to look up the actual SOC number and use the value
	* for that SOC. This information is taken from application note
	* AN2919.
	*/
	#if defined(CONFIG_MPC8540) \|\| defined(CONFIG_MPC8541) \|\| \
	defined(CONFIG_MPC8560) \|\| defined(CONFIG_MPC8555) \|\| \
	defined(CONFIG_P1022)
	gd->arch.i2c1_clk = sys_info.freq_systembus;
	#elif defined(CONFIG_MPC8544)
	/*
	* On the 8544, the I2C clock is the same as the SEC clock. This can be
	* either CCB/2 or CCB/3, depending on the value of cfg_sec_freq. See
	* 4.4.3.3 of the 8544 RM. Note that this might actually work for all
	* 85xx, but only the 8544 has cfg_sec_freq, so it's unknown if the
	* PORDEVSR2_SEC_CFG bit is 0 on all 85xx boards that are not an 8544.
	*/
	if (gur->pordevsr2 & MPC85xx_PORDEVSR2_SEC_CFG)
	gd->arch.i2c1_clk = sys_info.freq_systembus / 3;
	else
	gd->arch.i2c1_clk = sys_info.freq_systembus / 2;
	#else
	/* Most 85xx SOCs use CCB/2, so this is the default behavior. */
	gd->arch.i2c1_clk = sys_info.freq_systembus / 2;
	#endif
	gd->arch.i2c2_clk = gd->arch.i2c1_clk;

	#if defined(CONFIG_FSL_ESDHC)
	#if defined(CONFIG_MPC8569) \|\| defined(CONFIG_P1010) \|\|\
	defined(CONFIG_P1014)
	gd->arch.sdhc_clk = gd->bus_clk;
	#else
	gd->arch.sdhc_clk = gd->bus_clk / 2;
	#endif
	#endif /* defined(CONFIG_FSL_ESDHC) */

	#if defined(CONFIG_CPM2)
	gd->arch.vco_out = 2*sys_info.freq_systembus;
	gd->arch.cpm_clk = gd->arch.vco_out / 2;
	gd->arch.scc_clk = gd->arch.vco_out / 4;
	gd->arch.brg_clk = gd->arch.vco_out / (1 << (2 * (dfbrg + 1)));
	#endif

	if(gd->cpu_clk != 0) return (0);
	else return (1);
	}


	/********************************************
	* get_bus_freq
	* return system bus freq in Hz
	*********************************************/
	ulong get_bus_freq (ulong dummy)
	{
	return gd->bus_clk;
	}

	/********************************************
	* get_ddr_freq
	* return ddr bus freq in Hz
	*********************************************/
	ulong get_ddr_freq (ulong dummy)
	{
	return gd->mem_clk;
	}