X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-uboot.git;a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farmv7%2Fmx5%2Fclock.c;h=21fef9f55d8f144537577b264e6e98ebe5861def;hp=0b04a8819a4740068d9b28b7a9ee2127ea99e70b;hb=8ec346e17b5bf6897f038b8ecc3ecd073e097a22;hpb=d75c2a3d7f34ff1eb9920ad72483cff7cb6d358f diff --git a/arch/arm/cpu/armv7/mx5/clock.c b/arch/arm/cpu/armv7/mx5/clock.c index 0b04a8819a..21fef9f55d 100644 --- a/arch/arm/cpu/armv7/mx5/clock.c +++ b/arch/arm/cpu/armv7/mx5/clock.c @@ -4,23 +4,7 @@ * * (C) Copyright 2009 Freescale Semiconductor, Inc. * - * 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 + * SPDX-License-Identifier: GPL-2.0+ */ #include @@ -29,11 +13,16 @@ #include #include #include +#include +#include enum pll_clocks { PLL1_CLOCK = 0, PLL2_CLOCK, PLL3_CLOCK, +#ifdef CONFIG_MX53 + PLL4_CLOCK, +#endif PLL_CLOCKS, }; @@ -41,25 +30,333 @@ struct mxc_pll_reg *mxc_plls[PLL_CLOCKS] = { [PLL1_CLOCK] = (struct mxc_pll_reg *)PLL1_BASE_ADDR, [PLL2_CLOCK] = (struct mxc_pll_reg *)PLL2_BASE_ADDR, [PLL3_CLOCK] = (struct mxc_pll_reg *)PLL3_BASE_ADDR, +#ifdef CONFIG_MX53 + [PLL4_CLOCK] = (struct mxc_pll_reg *)PLL4_BASE_ADDR, +#endif +}; + +#define AHB_CLK_ROOT 133333333 +#define SZ_DEC_1M 1000000 +#define PLL_PD_MAX 16 /* Actual pd+1 */ +#define PLL_MFI_MAX 15 +#define PLL_MFI_MIN 5 +#define ARM_DIV_MAX 8 +#define IPG_DIV_MAX 4 +#define AHB_DIV_MAX 8 +#define EMI_DIV_MAX 8 +#define NFC_DIV_MAX 8 + +struct fixed_pll_mfd { + u32 ref_clk_hz; + u32 mfd; +}; + +const struct fixed_pll_mfd fixed_mfd[] = { + {MXC_HCLK, 24 * 16}, +}; + +struct pll_param { + u32 pd; + u32 mfi; + u32 mfn; + u32 mfd; }; +#define PLL_FREQ_MAX(ref_clk) (4 * (ref_clk) * PLL_MFI_MAX) +#define PLL_FREQ_MIN(ref_clk) \ + ((2 * (ref_clk) * (PLL_MFI_MIN - 1)) / PLL_PD_MAX) +#define MAX_DDR_CLK 420000000 +#define NFC_CLK_MAX 34000000 + struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)MXC_CCM_BASE; +int clk_enable(struct clk *clk) +{ + int ret = 0; + + if (!clk) + return 0; + if (clk->usecount++ == 0) { + ret = clk->enable(clk); + if (ret) + clk->usecount--; + } + return ret; +} + +void clk_disable(struct clk *clk) +{ + if (!clk) + return; + + if (!(--clk->usecount)) { + if (clk->disable) + clk->disable(clk); + } + if (clk->usecount < 0) { + printf("%s: clk %p underflow\n", __func__, clk); + hang(); + } +} + +int clk_get_usecount(struct clk *clk) +{ + if (clk == NULL) + return 0; + + return clk->usecount; +} + +u32 clk_get_rate(struct clk *clk) +{ + if (!clk) + return 0; + + return clk->rate; +} + +struct clk *clk_get_parent(struct clk *clk) +{ + if (!clk) + return 0; + + return clk->parent; +} + +int clk_set_rate(struct clk *clk, unsigned long rate) +{ + if (clk && clk->set_rate) + clk->set_rate(clk, rate); + return clk->rate; +} + +long clk_round_rate(struct clk *clk, unsigned long rate) +{ + if (clk == NULL || !clk->round_rate) + return 0; + + return clk->round_rate(clk, rate); +} + +int clk_set_parent(struct clk *clk, struct clk *parent) +{ + debug("Setting parent of clk %p to %p (%p)\n", clk, parent, + clk ? clk->parent : NULL); + + if (!clk || clk == parent) + return 0; + + if (clk->set_parent) { + int ret; + + ret = clk->set_parent(clk, parent); + if (ret) + return ret; + } + clk->parent = parent; + return 0; +} + +void set_usboh3_clk(void) +{ + clrsetbits_le32(&mxc_ccm->cscmr1, + MXC_CCM_CSCMR1_USBOH3_CLK_SEL_MASK, + MXC_CCM_CSCMR1_USBOH3_CLK_SEL(1)); + clrsetbits_le32(&mxc_ccm->cscdr1, + MXC_CCM_CSCDR1_USBOH3_CLK_PODF_MASK | + MXC_CCM_CSCDR1_USBOH3_CLK_PRED_MASK, + MXC_CCM_CSCDR1_USBOH3_CLK_PRED(4) | + MXC_CCM_CSCDR1_USBOH3_CLK_PODF(1)); +} + +void enable_usboh3_clk(unsigned char enable) +{ + unsigned int cg = enable ? MXC_CCM_CCGR_CG_ON : MXC_CCM_CCGR_CG_OFF; + + clrsetbits_le32(&mxc_ccm->CCGR2, + MXC_CCM_CCGR2_USBOH3_60M(MXC_CCM_CCGR_CG_MASK), + MXC_CCM_CCGR2_USBOH3_60M(cg)); +} + +void ipu_clk_enable(void) +{ + /* IPU root clock derived from AXI B */ + clrsetbits_le32(&mxc_ccm->cbcmr, MXC_CCM_CBCMR_IPU_HSP_CLK_SEL_MASK, + MXC_CCM_CBCMR_IPU_HSP_CLK_SEL(1)); + + setbits_le32(&mxc_ccm->CCGR5, + MXC_CCM_CCGR5_IPU(MXC_CCM_CCGR_CG_MASK)); + + /* Handshake with IPU when certain clock rates are changed. */ + clrbits_le32(&mxc_ccm->ccdr, MXC_CCM_CCDR_IPU_HS_MASK); + + /* Handshake with IPU when LPM is entered as its enabled. */ + clrbits_le32(&mxc_ccm->clpcr, MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS); +} + +void ipu_clk_disable(void) +{ + clrbits_le32(&mxc_ccm->CCGR5, + MXC_CCM_CCGR5_IPU(MXC_CCM_CCGR_CG_MASK)); + + /* Handshake with IPU when certain clock rates are changed. */ + setbits_le32(&mxc_ccm->ccdr, MXC_CCM_CCDR_IPU_HS_MASK); + + /* Handshake with IPU when LPM is entered as its enabled. */ + setbits_le32(&mxc_ccm->clpcr, MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS); +} + +#ifdef CONFIG_I2C_MXC +/* i2c_num can be from 0, to 1 for i.MX51 and 2 for i.MX53 */ +int enable_i2c_clk(unsigned char enable, unsigned i2c_num) +{ + u32 mask; + +#if defined(CONFIG_MX51) + if (i2c_num > 1) +#elif defined(CONFIG_MX53) + if (i2c_num > 2) +#endif + return -EINVAL; + mask = MXC_CCM_CCGR_CG_MASK << + (MXC_CCM_CCGR1_I2C1_OFFSET + (i2c_num << 1)); + if (enable) + setbits_le32(&mxc_ccm->CCGR1, mask); + else + clrbits_le32(&mxc_ccm->CCGR1, mask); + return 0; +} +#endif + +void set_usb_phy_clk(void) +{ + clrbits_le32(&mxc_ccm->cscmr1, MXC_CCM_CSCMR1_USB_PHY_CLK_SEL); +} + +#if defined(CONFIG_MX51) +void enable_usb_phy1_clk(unsigned char enable) +{ + unsigned int cg = enable ? MXC_CCM_CCGR_CG_ON : MXC_CCM_CCGR_CG_OFF; + + clrsetbits_le32(&mxc_ccm->CCGR2, + MXC_CCM_CCGR2_USB_PHY(MXC_CCM_CCGR_CG_MASK), + MXC_CCM_CCGR2_USB_PHY(cg)); +} + +void enable_usb_phy2_clk(unsigned char enable) +{ + /* i.MX51 has a single USB PHY clock, so do nothing here. */ +} +#elif defined(CONFIG_MX53) +void enable_usb_phy1_clk(unsigned char enable) +{ + unsigned int cg = enable ? MXC_CCM_CCGR_CG_ON : MXC_CCM_CCGR_CG_OFF; + + clrsetbits_le32(&mxc_ccm->CCGR4, + MXC_CCM_CCGR4_USB_PHY1(MXC_CCM_CCGR_CG_MASK), + MXC_CCM_CCGR4_USB_PHY1(cg)); +} + +void enable_usb_phy2_clk(unsigned char enable) +{ + unsigned int cg = enable ? MXC_CCM_CCGR_CG_ON : MXC_CCM_CCGR_CG_OFF; + + clrsetbits_le32(&mxc_ccm->CCGR4, + MXC_CCM_CCGR4_USB_PHY2(MXC_CCM_CCGR_CG_MASK), + MXC_CCM_CCGR4_USB_PHY2(cg)); +} +#endif + /* - * Calculate the frequency of this pll. + * Calculate the frequency of PLLn. */ -static u32 decode_pll(struct mxc_pll_reg *pll, u32 infreq) +static uint32_t decode_pll(struct mxc_pll_reg *pll, uint32_t infreq) { - u32 mfi, mfn, mfd, pd; + uint32_t ctrl, op, mfd, mfn, mfi, pdf, ret; + uint64_t refclk, temp; + int32_t mfn_abs; + + ctrl = readl(&pll->ctrl); + + if (ctrl & MXC_DPLLC_CTL_HFSM) { + mfn = readl(&pll->hfs_mfn); + mfd = readl(&pll->hfs_mfd); + op = readl(&pll->hfs_op); + } else { + mfn = readl(&pll->mfn); + mfd = readl(&pll->mfd); + op = readl(&pll->op); + } + + mfd &= MXC_DPLLC_MFD_MFD_MASK; + mfn &= MXC_DPLLC_MFN_MFN_MASK; + pdf = op & MXC_DPLLC_OP_PDF_MASK; + mfi = MXC_DPLLC_OP_MFI_RD(op); + + /* 21.2.3 */ + if (mfi < 5) + mfi = 5; - mfn = __raw_readl(&pll->mfn); - mfd = __raw_readl(&pll->mfd) + 1; - mfi = __raw_readl(&pll->op); - pd = (mfi & 0xF) + 1; - mfi = (mfi >> 4) & 0xF; - mfi = (mfi >= 5) ? mfi : 5; + /* Sign extend */ + if (mfn >= 0x04000000) { + mfn |= 0xfc000000; + mfn_abs = -mfn; + } else + mfn_abs = mfn; - return ((4 * (infreq / 1000) * (mfi * mfd + mfn)) / (mfd * pd)) * 1000; + refclk = infreq * 2; + if (ctrl & MXC_DPLLC_CTL_DPDCK0_2_EN) + refclk *= 2; + + do_div(refclk, pdf + 1); + temp = refclk * mfn_abs; + do_div(temp, mfd + 1); + ret = refclk * mfi; + + if ((int)mfn < 0) + ret -= temp; + else + ret += temp; + + return ret; +} + +#ifdef CONFIG_MX51 +/* + * This function returns the Frequency Pre-Multiplier clock. + */ +static u32 get_fpm(void) +{ + u32 mult; + u32 ccr = readl(&mxc_ccm->ccr); + + if (ccr & MXC_CCM_CCR_FPM_MULT) + mult = 1024; + else + mult = 512; + + return MXC_CLK32 * mult; +} +#endif + +/* + * This function returns the low power audio clock. + */ +static u32 get_lp_apm(void) +{ + u32 ret_val = 0; + u32 ccsr = readl(&mxc_ccm->ccsr); + + if (ccsr & MXC_CCM_CCSR_LP_APM) +#if defined(CONFIG_MX51) + ret_val = get_fpm(); +#elif defined(CONFIG_MX53) + ret_val = decode_pll(mxc_plls[PLL4_CLOCK], MXC_HCLK); +#endif + else + ret_val = MXC_HCLK; + + return ret_val; } /* @@ -69,29 +366,29 @@ u32 get_mcu_main_clk(void) { u32 reg, freq; - reg = (__raw_readl(&mxc_ccm->cacrr) & MXC_CCM_CACRR_ARM_PODF_MASK) >> - MXC_CCM_CACRR_ARM_PODF_OFFSET; - freq = decode_pll(mxc_plls[PLL1_CLOCK], CONFIG_SYS_MX5_HCLK); + reg = MXC_CCM_CACRR_ARM_PODF_RD(readl(&mxc_ccm->cacrr)); + freq = decode_pll(mxc_plls[PLL1_CLOCK], MXC_HCLK); return freq / (reg + 1); } /* * Get the rate of peripheral's root clock. */ -static u32 get_periph_clk(void) +u32 get_periph_clk(void) { u32 reg; - reg = __raw_readl(&mxc_ccm->cbcdr); + reg = readl(&mxc_ccm->cbcdr); if (!(reg & MXC_CCM_CBCDR_PERIPH_CLK_SEL)) - return decode_pll(mxc_plls[PLL2_CLOCK], CONFIG_SYS_MX5_HCLK); - reg = __raw_readl(&mxc_ccm->cbcmr); - switch ((reg & MXC_CCM_CBCMR_PERIPH_CLK_SEL_MASK) >> - MXC_CCM_CBCMR_PERIPH_CLK_SEL_OFFSET) { + return decode_pll(mxc_plls[PLL2_CLOCK], MXC_HCLK); + reg = readl(&mxc_ccm->cbcmr); + switch (MXC_CCM_CBCMR_PERIPH_CLK_SEL_RD(reg)) { case 0: - return decode_pll(mxc_plls[PLL1_CLOCK], CONFIG_SYS_MX5_HCLK); + return decode_pll(mxc_plls[PLL1_CLOCK], MXC_HCLK); case 1: - return decode_pll(mxc_plls[PLL3_CLOCK], CONFIG_SYS_MX5_HCLK); + return decode_pll(mxc_plls[PLL3_CLOCK], MXC_HCLK); + case 2: + return get_lp_apm(); default: return 0; } @@ -103,14 +400,14 @@ static u32 get_periph_clk(void) */ static u32 get_ipg_clk(void) { - u32 ahb_podf, ipg_podf; + uint32_t freq, reg, div; + + freq = get_ahb_clk(); - ahb_podf = __raw_readl(&mxc_ccm->cbcdr); - ipg_podf = (ahb_podf & MXC_CCM_CBCDR_IPG_PODF_MASK) >> - MXC_CCM_CBCDR_IPG_PODF_OFFSET; - ahb_podf = (ahb_podf & MXC_CCM_CBCDR_AHB_PODF_MASK) >> - MXC_CCM_CBCDR_AHB_PODF_OFFSET; - return get_periph_clk() / ((ahb_podf + 1) * (ipg_podf + 1)); + reg = readl(&mxc_ccm->cbcdr); + div = MXC_CCM_CBCDR_IPG_PODF_RD(reg) + 1; + + return freq / div; } /* @@ -118,110 +415,177 @@ static u32 get_ipg_clk(void) */ static u32 get_ipg_per_clk(void) { - u32 pred1, pred2, podf; + u32 freq, pred1, pred2, podf; - if (__raw_readl(&mxc_ccm->cbcmr) & MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL) + if (readl(&mxc_ccm->cbcmr) & MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL) return get_ipg_clk(); - /* Fixme: not handle what about lpm*/ - podf = __raw_readl(&mxc_ccm->cbcdr); - pred1 = (podf & MXC_CCM_CBCDR_PERCLK_PRED1_MASK) >> - MXC_CCM_CBCDR_PERCLK_PRED1_OFFSET; - pred2 = (podf & MXC_CCM_CBCDR_PERCLK_PRED2_MASK) >> - MXC_CCM_CBCDR_PERCLK_PRED2_OFFSET; - podf = (podf & MXC_CCM_CBCDR_PERCLK_PODF_MASK) >> - MXC_CCM_CBCDR_PERCLK_PODF_OFFSET; - return get_periph_clk() / ((pred1 + 1) * (pred2 + 1) * (podf + 1)); + if (readl(&mxc_ccm->cbcmr) & MXC_CCM_CBCMR_PERCLK_LP_APM_CLK_SEL) + freq = get_lp_apm(); + else + freq = get_periph_clk(); + podf = readl(&mxc_ccm->cbcdr); + pred1 = MXC_CCM_CBCDR_PERCLK_PRED1_RD(podf); + pred2 = MXC_CCM_CBCDR_PERCLK_PRED2_RD(podf); + podf = MXC_CCM_CBCDR_PERCLK_PODF_RD(podf); + return freq / ((pred1 + 1) * (pred2 + 1) * (podf + 1)); } -/* - * Get the rate of uart clk. - */ -static u32 get_uart_clk(void) +/* Get the output clock rate of a standard PLL MUX for peripherals. */ +static u32 get_standard_pll_sel_clk(u32 clk_sel) { - unsigned int freq, reg, pred, podf; + u32 freq = 0; - reg = __raw_readl(&mxc_ccm->cscmr1); - switch ((reg & MXC_CCM_CSCMR1_UART_CLK_SEL_MASK) >> - MXC_CCM_CSCMR1_UART_CLK_SEL_OFFSET) { - case 0x0: - freq = decode_pll(mxc_plls[PLL1_CLOCK], - CONFIG_SYS_MX5_HCLK); + switch (clk_sel & 0x3) { + case 0: + freq = decode_pll(mxc_plls[PLL1_CLOCK], MXC_HCLK); break; - case 0x1: - freq = decode_pll(mxc_plls[PLL2_CLOCK], - CONFIG_SYS_MX5_HCLK); + case 1: + freq = decode_pll(mxc_plls[PLL2_CLOCK], MXC_HCLK); + break; + case 2: + freq = decode_pll(mxc_plls[PLL3_CLOCK], MXC_HCLK); break; - case 0x2: - freq = decode_pll(mxc_plls[PLL3_CLOCK], - CONFIG_SYS_MX5_HCLK); + case 3: + freq = get_lp_apm(); break; - default: - return 66500000; } - reg = __raw_readl(&mxc_ccm->cscdr1); + return freq; +} - pred = (reg & MXC_CCM_CSCDR1_UART_CLK_PRED_MASK) >> - MXC_CCM_CSCDR1_UART_CLK_PRED_OFFSET; +/* + * Get the rate of uart clk. + */ +static u32 get_uart_clk(void) +{ + unsigned int clk_sel, freq, reg, pred, podf; - podf = (reg & MXC_CCM_CSCDR1_UART_CLK_PODF_MASK) >> - MXC_CCM_CSCDR1_UART_CLK_PODF_OFFSET; + reg = readl(&mxc_ccm->cscmr1); + clk_sel = MXC_CCM_CSCMR1_UART_CLK_SEL_RD(reg); + freq = get_standard_pll_sel_clk(clk_sel); + + reg = readl(&mxc_ccm->cscdr1); + pred = MXC_CCM_CSCDR1_UART_CLK_PRED_RD(reg); + podf = MXC_CCM_CSCDR1_UART_CLK_PODF_RD(reg); freq /= (pred + 1) * (podf + 1); return freq; } /* - * This function returns the low power audio clock. + * get cspi clock rate. */ -u32 get_lp_apm(void) +static u32 imx_get_cspiclk(void) { - u32 ret_val = 0; - u32 ccsr = __raw_readl(&mxc_ccm->ccsr); - - if (((ccsr >> 9) & 1) == 0) - ret_val = CONFIG_SYS_MX5_HCLK; - else - ret_val = ((32768 * 1024)); + u32 ret_val = 0, pdf, pre_pdf, clk_sel, freq; + u32 cscmr1 = readl(&mxc_ccm->cscmr1); + u32 cscdr2 = readl(&mxc_ccm->cscdr2); + pre_pdf = MXC_CCM_CSCDR2_CSPI_CLK_PRED_RD(cscdr2); + pdf = MXC_CCM_CSCDR2_CSPI_CLK_PODF_RD(cscdr2); + clk_sel = MXC_CCM_CSCMR1_CSPI_CLK_SEL_RD(cscmr1); + freq = get_standard_pll_sel_clk(clk_sel); + ret_val = freq / ((pre_pdf + 1) * (pdf + 1)); return ret_val; } /* - * get cspi clock rate. + * get esdhc clock rate. */ -u32 imx_get_cspiclk(void) +static u32 get_esdhc_clk(u32 port) { - u32 ret_val = 0, pdf, pre_pdf, clk_sel; - u32 cscmr1 = __raw_readl(&mxc_ccm->cscmr1); - u32 cscdr2 = __raw_readl(&mxc_ccm->cscdr2); + u32 clk_sel = 0, pred = 0, podf = 0, freq = 0; + u32 cscmr1 = readl(&mxc_ccm->cscmr1); + u32 cscdr1 = readl(&mxc_ccm->cscdr1); - pre_pdf = (cscdr2 & MXC_CCM_CSCDR2_CSPI_CLK_PRED_MASK) \ - >> MXC_CCM_CSCDR2_CSPI_CLK_PRED_OFFSET; - pdf = (cscdr2 & MXC_CCM_CSCDR2_CSPI_CLK_PODF_MASK) \ - >> MXC_CCM_CSCDR2_CSPI_CLK_PODF_OFFSET; - clk_sel = (cscmr1 & MXC_CCM_CSCMR1_CSPI_CLK_SEL_MASK) \ - >> MXC_CCM_CSCMR1_CSPI_CLK_SEL_OFFSET; + switch (port) { + case 0: + clk_sel = MXC_CCM_CSCMR1_ESDHC1_MSHC1_CLK_SEL_RD(cscmr1); + pred = MXC_CCM_CSCDR1_ESDHC1_MSHC1_CLK_PRED_RD(cscdr1); + podf = MXC_CCM_CSCDR1_ESDHC1_MSHC1_CLK_PODF_RD(cscdr1); + break; + case 1: + clk_sel = MXC_CCM_CSCMR1_ESDHC2_MSHC2_CLK_SEL_RD(cscmr1); + pred = MXC_CCM_CSCDR1_ESDHC2_MSHC2_CLK_PRED_RD(cscdr1); + podf = MXC_CCM_CSCDR1_ESDHC2_MSHC2_CLK_PODF_RD(cscdr1); + break; + case 2: + if (cscmr1 & MXC_CCM_CSCMR1_ESDHC3_CLK_SEL) + return get_esdhc_clk(1); + else + return get_esdhc_clk(0); + case 3: + if (cscmr1 & MXC_CCM_CSCMR1_ESDHC4_CLK_SEL) + return get_esdhc_clk(1); + else + return get_esdhc_clk(0); + default: + break; + } - switch (clk_sel) { + freq = get_standard_pll_sel_clk(clk_sel) / ((pred + 1) * (podf + 1)); + return freq; +} + +static u32 get_axi_a_clk(void) +{ + u32 cbcdr = readl(&mxc_ccm->cbcdr); + u32 pdf = MXC_CCM_CBCDR_AXI_A_PODF_RD(cbcdr); + + return get_periph_clk() / (pdf + 1); +} + +static u32 get_axi_b_clk(void) +{ + u32 cbcdr = readl(&mxc_ccm->cbcdr); + u32 pdf = MXC_CCM_CBCDR_AXI_B_PODF_RD(cbcdr); + + return get_periph_clk() / (pdf + 1); +} + +static u32 get_emi_slow_clk(void) +{ + u32 cbcdr = readl(&mxc_ccm->cbcdr); + u32 emi_clk_sel = cbcdr & MXC_CCM_CBCDR_EMI_CLK_SEL; + u32 pdf = MXC_CCM_CBCDR_EMI_PODF_RD(cbcdr); + + if (emi_clk_sel) + return get_ahb_clk() / (pdf + 1); + + return get_periph_clk() / (pdf + 1); +} + +static u32 get_ddr_clk(void) +{ + u32 ret_val = 0; + u32 cbcmr = readl(&mxc_ccm->cbcmr); + u32 ddr_clk_sel = MXC_CCM_CBCMR_DDR_CLK_SEL_RD(cbcmr); +#ifdef CONFIG_MX51 + u32 cbcdr = readl(&mxc_ccm->cbcdr); + if (cbcdr & MXC_CCM_CBCDR_DDR_HIFREQ_SEL) { + u32 ddr_clk_podf = MXC_CCM_CBCDR_DDR_PODF_RD(cbcdr); + + ret_val = decode_pll(mxc_plls[PLL1_CLOCK], MXC_HCLK); + ret_val /= ddr_clk_podf + 1; + + return ret_val; + } +#endif + switch (ddr_clk_sel) { case 0: - ret_val = decode_pll(mxc_plls[PLL1_CLOCK], - CONFIG_SYS_MX5_HCLK) / - ((pre_pdf + 1) * (pdf + 1)); + ret_val = get_axi_a_clk(); break; case 1: - ret_val = decode_pll(mxc_plls[PLL2_CLOCK], - CONFIG_SYS_MX5_HCLK) / - ((pre_pdf + 1) * (pdf + 1)); + ret_val = get_axi_b_clk(); break; case 2: - ret_val = decode_pll(mxc_plls[PLL3_CLOCK], - CONFIG_SYS_MX5_HCLK) / - ((pre_pdf + 1) * (pdf + 1)); + ret_val = get_emi_slow_clk(); + break; + case 3: + ret_val = get_ahb_clk(); break; default: - ret_val = get_lp_apm() / ((pre_pdf + 1) * (pdf + 1)); break; } @@ -229,7 +593,7 @@ u32 imx_get_cspiclk(void) } /* - * The API of get mxc clockes. + * The API of get mxc clocks. */ unsigned int mxc_get_clock(enum mxc_clock clk) { @@ -237,22 +601,34 @@ unsigned int mxc_get_clock(enum mxc_clock clk) case MXC_ARM_CLK: return get_mcu_main_clk(); case MXC_AHB_CLK: - break; + return get_ahb_clk(); case MXC_IPG_CLK: return get_ipg_clk(); case MXC_IPG_PERCLK: + case MXC_I2C_CLK: return get_ipg_per_clk(); case MXC_UART_CLK: return get_uart_clk(); case MXC_CSPI_CLK: return imx_get_cspiclk(); + case MXC_ESDHC_CLK: + return get_esdhc_clk(0); + case MXC_ESDHC2_CLK: + return get_esdhc_clk(1); + case MXC_ESDHC3_CLK: + return get_esdhc_clk(2); + case MXC_ESDHC4_CLK: + return get_esdhc_clk(3); case MXC_FEC_CLK: - return decode_pll(mxc_plls[PLL1_CLOCK], - CONFIG_SYS_MX5_HCLK); + return get_ipg_clk(); + case MXC_SATA_CLK: + return get_ahb_clk(); + case MXC_DDR_CLK: + return get_ddr_clk(); default: break; } - return -1; + return -EINVAL; } u32 imx_get_uartclk(void) @@ -260,35 +636,417 @@ u32 imx_get_uartclk(void) return get_uart_clk(); } - u32 imx_get_fecclk(void) { - return mxc_get_clock(MXC_IPG_CLK); + return get_ipg_clk(); +} + +static int gcd(int m, int n) +{ + int t; + while (m > 0) { + if (n > m) { + t = m; + m = n; + n = t; + } /* swap */ + m -= n; + } + return n; +} + +/* + * This is to calculate various parameters based on reference clock and + * targeted clock based on the equation: + * t_clk = 2*ref_freq*(mfi + mfn/(mfd+1))/(pd+1) + * This calculation is based on a fixed MFD value for simplicity. + */ +static int calc_pll_params(u32 ref, u32 target, struct pll_param *pll) +{ + u64 pd, mfi = 1, mfn, mfd, t1; + u32 n_target = target; + u32 n_ref = ref, i; + + /* + * Make sure targeted freq is in the valid range. + * Otherwise the following calculation might be wrong!!! + */ + if (n_target < PLL_FREQ_MIN(ref) || + n_target > PLL_FREQ_MAX(ref)) { + printf("Targeted peripheral clock should be within [%d - %d]\n", + PLL_FREQ_MIN(ref) / SZ_DEC_1M, + PLL_FREQ_MAX(ref) / SZ_DEC_1M); + return -EINVAL; + } + + for (i = 0; i < ARRAY_SIZE(fixed_mfd); i++) { + if (fixed_mfd[i].ref_clk_hz == ref) { + mfd = fixed_mfd[i].mfd; + break; + } + } + + if (i == ARRAY_SIZE(fixed_mfd)) + return -EINVAL; + + /* Use n_target and n_ref to avoid overflow */ + for (pd = 1; pd <= PLL_PD_MAX; pd++) { + t1 = n_target * pd; + do_div(t1, (4 * n_ref)); + mfi = t1; + if (mfi > PLL_MFI_MAX) + return -EINVAL; + else if (mfi < 5) + continue; + break; + } + /* + * Now got pd and mfi already + * + * mfn = (((n_target * pd) / 4 - n_ref * mfi) * mfd) / n_ref; + */ + t1 = n_target * pd; + do_div(t1, 4); + t1 -= n_ref * mfi; + t1 *= mfd; + do_div(t1, n_ref); + mfn = t1; + debug("ref=%d, target=%d, pd=%d," "mfi=%d,mfn=%d, mfd=%d\n", + ref, n_target, (u32)pd, (u32)mfi, (u32)mfn, (u32)mfd); + i = 1; + if (mfn != 0) + i = gcd(mfd, mfn); + pll->pd = (u32)pd; + pll->mfi = (u32)mfi; + do_div(mfn, i); + pll->mfn = (u32)mfn; + do_div(mfd, i); + pll->mfd = (u32)mfd; + + return 0; +} + +#define calc_div(tgt_clk, src_clk, limit) ({ \ + u32 v = 0; \ + if (((src_clk) % (tgt_clk)) <= 100) \ + v = (src_clk) / (tgt_clk); \ + else \ + v = ((src_clk) / (tgt_clk)) + 1;\ + if (v > limit) \ + v = limit; \ + (v - 1); \ + }) + +#define CHANGE_PLL_SETTINGS(pll, pd, fi, fn, fd) \ + { \ + __raw_writel(0x1232, &pll->ctrl); \ + __raw_writel(0x2, &pll->config); \ + __raw_writel((((pd) - 1) << 0) | ((fi) << 4), \ + &pll->op); \ + __raw_writel(fn, &(pll->mfn)); \ + __raw_writel((fd) - 1, &pll->mfd); \ + __raw_writel((((pd) - 1) << 0) | ((fi) << 4), \ + &pll->hfs_op); \ + __raw_writel(fn, &pll->hfs_mfn); \ + __raw_writel((fd) - 1, &pll->hfs_mfd); \ + __raw_writel(0x1232, &pll->ctrl); \ + while (!__raw_readl(&pll->ctrl) & 0x1) \ + ;\ + } + +static int config_pll_clk(enum pll_clocks index, struct pll_param *pll_param) +{ + u32 ccsr = __raw_readl(&mxc_ccm->ccsr); + struct mxc_pll_reg *pll = mxc_plls[index]; + + switch (index) { + case PLL1_CLOCK: + /* Switch ARM to PLL2 clock */ + __raw_writel(ccsr | 0x4, &mxc_ccm->ccsr); + CHANGE_PLL_SETTINGS(pll, pll_param->pd, + pll_param->mfi, pll_param->mfn, + pll_param->mfd); + /* Switch back */ + __raw_writel(ccsr & ~0x4, &mxc_ccm->ccsr); + break; + case PLL2_CLOCK: + /* Switch to pll2 bypass clock */ + __raw_writel(ccsr | 0x2, &mxc_ccm->ccsr); + CHANGE_PLL_SETTINGS(pll, pll_param->pd, + pll_param->mfi, pll_param->mfn, + pll_param->mfd); + /* Switch back */ + __raw_writel(ccsr & ~0x2, &mxc_ccm->ccsr); + break; + case PLL3_CLOCK: + /* Switch to pll3 bypass clock */ + __raw_writel(ccsr | 0x1, &mxc_ccm->ccsr); + CHANGE_PLL_SETTINGS(pll, pll_param->pd, + pll_param->mfi, pll_param->mfn, + pll_param->mfd); + /* Switch back */ + __raw_writel(ccsr & ~0x1, &mxc_ccm->ccsr); + break; +#ifdef CONFIG_MX53 + case PLL4_CLOCK: + /* Switch to pll4 bypass clock */ + __raw_writel(ccsr | 0x20, &mxc_ccm->ccsr); + CHANGE_PLL_SETTINGS(pll, pll_param->pd, + pll_param->mfi, pll_param->mfn, + pll_param->mfd); + /* Switch back */ + __raw_writel(ccsr & ~0x20, &mxc_ccm->ccsr); + break; +#endif + default: + return -EINVAL; + } + + return 0; +} + +/* Config CPU clock */ +static int config_core_clk(u32 ref, u32 freq) +{ + int ret = 0; + struct pll_param pll_param; + + memset(&pll_param, 0, sizeof(struct pll_param)); + + /* The case that periph uses PLL1 is not considered here */ + ret = calc_pll_params(ref, freq, &pll_param); + if (ret != 0) { + printf("Error: Can't find pll parameters for %u.%03uMHz ref %u.%03uMHz\n", + freq / 1000000, freq / 1000 % 1000, + ref / 1000000, ref / 1000 % 1000); + return ret; + } + + return config_pll_clk(PLL1_CLOCK, &pll_param); } +static int config_nfc_clk(u32 nfc_clk) +{ + u32 parent_rate = get_emi_slow_clk(); + u32 div; + + if (nfc_clk == 0) + return -EINVAL; + div = parent_rate / nfc_clk; + if (div == 0) + div++; + if (parent_rate / div > NFC_CLK_MAX) + div++; + clrsetbits_le32(&mxc_ccm->cbcdr, + MXC_CCM_CBCDR_NFC_PODF_MASK, + MXC_CCM_CBCDR_NFC_PODF(div - 1)); + while (readl(&mxc_ccm->cdhipr) != 0) + ; + return 0; +} + +void enable_nfc_clk(unsigned char enable) +{ + unsigned int cg = enable ? MXC_CCM_CCGR_CG_ON : MXC_CCM_CCGR_CG_OFF; + + clrsetbits_le32(&mxc_ccm->CCGR5, + MXC_CCM_CCGR5_EMI_ENFC(MXC_CCM_CCGR_CG_MASK), + MXC_CCM_CCGR5_EMI_ENFC(cg)); +} + +/* Config main_bus_clock for periphs */ +static int config_periph_clk(u32 ref, u32 freq) +{ + int ret = 0; + struct pll_param pll_param; + + memset(&pll_param, 0, sizeof(struct pll_param)); + + if (readl(&mxc_ccm->cbcdr) & MXC_CCM_CBCDR_PERIPH_CLK_SEL) { + ret = calc_pll_params(ref, freq, &pll_param); + if (ret != 0) { + printf("Error:Can't find pll parameters: %d\n", + ret); + return ret; + } + switch (MXC_CCM_CBCMR_PERIPH_CLK_SEL_RD( + readl(&mxc_ccm->cbcmr))) { + case 0: + return config_pll_clk(PLL1_CLOCK, &pll_param); + break; + case 1: + return config_pll_clk(PLL3_CLOCK, &pll_param); + break; + default: + return -EINVAL; + } + } + + return 0; +} + +static int config_ddr_clk(u32 emi_clk) +{ + u32 clk_src; + s32 shift = 0, clk_sel, div = 1; + u32 cbcmr = readl(&mxc_ccm->cbcmr); + + if (emi_clk > MAX_DDR_CLK) { + printf("Warning:DDR clock should not exceed %d MHz\n", + MAX_DDR_CLK / SZ_DEC_1M); + emi_clk = MAX_DDR_CLK; + } + + clk_src = get_periph_clk(); + /* Find DDR clock input */ + clk_sel = MXC_CCM_CBCMR_DDR_CLK_SEL_RD(cbcmr); + switch (clk_sel) { + case 0: + shift = 16; + break; + case 1: + shift = 19; + break; + case 2: + shift = 22; + break; + case 3: + shift = 10; + break; + default: + return -EINVAL; + } + + if ((clk_src % emi_clk) < 10000000) + div = clk_src / emi_clk; + else + div = (clk_src / emi_clk) + 1; + if (div > 8) + div = 8; + + clrsetbits_le32(&mxc_ccm->cbcdr, 0x7 << shift, (div - 1) << shift); + while (readl(&mxc_ccm->cdhipr) != 0) + ; + writel(0x0, &mxc_ccm->ccdr); + + return 0; +} + +/* + * This function assumes the expected core clock has to be changed by + * modifying the PLL. This is NOT true always but for most of the times, + * it is. So it assumes the PLL output freq is the same as the expected + * core clock (presc=1) unless the core clock is less than PLL_FREQ_MIN. + * In the latter case, it will try to increase the presc value until + * (presc*core_clk) is greater than PLL_FREQ_MIN. It then makes call to + * calc_pll_params() and obtains the values of PD, MFI,MFN, MFD based + * on the targeted PLL and reference input clock to the PLL. Lastly, + * it sets the register based on these values along with the dividers. + * Note 1) There is no value checking for the passed-in divider values + * so the caller has to make sure those values are sensible. + * 2) Also adjust the NFC divider such that the NFC clock doesn't + * exceed NFC_CLK_MAX. + * 3) IPU HSP clock is independent of AHB clock. Even it can go up to + * 177MHz for higher voltage, this function fixes the max to 133MHz. + * 4) This function should not have allowed diag_printf() calls since + * the serial driver has been stoped. But leave then here to allow + * easy debugging by NOT calling the cyg_hal_plf_serial_stop(). + */ +int mxc_set_clock(u32 ref, u32 freq, enum mxc_clock clk) +{ + freq *= SZ_DEC_1M; + + switch (clk) { + case MXC_ARM_CLK: + if (config_core_clk(ref, freq)) + return -EINVAL; + break; + case MXC_PERIPH_CLK: + if (config_periph_clk(ref, freq)) + return -EINVAL; + break; + case MXC_DDR_CLK: + if (config_ddr_clk(freq)) + return -EINVAL; + break; + case MXC_NFC_CLK: + if (config_nfc_clk(freq)) + return -EINVAL; + break; + default: + printf("Warning:Unsupported or invalid clock type\n"); + } + + return 0; +} + +#ifdef CONFIG_MX53 +/* + * The clock for the external interface can be set to use internal clock + * if fuse bank 4, row 3, bit 2 is set. + * This is an undocumented feature and it was confirmed by Freescale's support: + * Fuses (but not pins) may be used to configure SATA clocks. + * Particularly the i.MX53 Fuse_Map contains the next information + * about configuring SATA clocks : SATA_ALT_REF_CLK[1:0] (offset 0x180C) + * '00' - 100MHz (External) + * '01' - 50MHz (External) + * '10' - 120MHz, internal (USB PHY) + * '11' - Reserved +*/ +void mxc_set_sata_internal_clock(void) +{ + u32 *tmp_base = + (u32 *)(IIM_BASE_ADDR + 0x180c); + + set_usb_phy_clk(); + + clrsetbits_le32(tmp_base, 0x6, 0x4); +} +#endif + /* * Dump some core clockes. */ +#define pr_clk_val(c, v) { \ + printf("%-11s %3lu.%03lu MHz\n", #c, \ + (v) / 1000000, (v) / 1000 % 1000); \ +} + +#define pr_clk(c) { \ + unsigned long __clk = mxc_get_clock(MXC_##c##_CLK); \ + pr_clk_val(c, __clk); \ +} + int do_mx5_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { - u32 freq; + unsigned long freq; - freq = decode_pll(mxc_plls[PLL1_CLOCK], CONFIG_SYS_MX5_HCLK); - printf("pll1: %dMHz\n", freq / 1000000); - freq = decode_pll(mxc_plls[PLL2_CLOCK], CONFIG_SYS_MX5_HCLK); - printf("pll2: %dMHz\n", freq / 1000000); - freq = decode_pll(mxc_plls[PLL3_CLOCK], CONFIG_SYS_MX5_HCLK); - printf("pll3: %dMHz\n", freq / 1000000); - printf("ipg clock : %dHz\n", mxc_get_clock(MXC_IPG_CLK)); - printf("ipg per clock : %dHz\n", mxc_get_clock(MXC_IPG_PERCLK)); + freq = decode_pll(mxc_plls[PLL1_CLOCK], MXC_HCLK); + pr_clk_val(PLL1, freq); + freq = decode_pll(mxc_plls[PLL2_CLOCK], MXC_HCLK); + pr_clk_val(PLL2, freq); + freq = decode_pll(mxc_plls[PLL3_CLOCK], MXC_HCLK); + pr_clk_val(PLL3, freq); +#ifdef CONFIG_MX53 + freq = decode_pll(mxc_plls[PLL4_CLOCK], MXC_HCLK); + pr_clk_val(PLL4, freq); +#endif + printf("\n"); + pr_clk(AHB); + pr_clk(IPG); + pr_clk(IPG); + pr_clk(DDR); +#ifdef CONFIG_MXC_SPI + pr_clk(CSPI); +#endif return 0; } /***************************************************/ U_BOOT_CMD( - clockinfo, CONFIG_SYS_MAXARGS, 1, do_mx5_showclocks, - "display clocks\n", + clocks, CONFIG_SYS_MAXARGS, 1, do_mx5_showclocks, + "display clocks", "" );