/* * (C) Copyright 2007 * Sascha Hauer, Pengutronix * * (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 */ #include #include #include #include #include #include #include #include enum pll_clocks { PLL1_CLOCK = 0, PLL2_CLOCK, PLL3_CLOCK, #ifdef CONFIG_MX53 PLL4_CLOCK, #endif PLL_CLOCKS, }; 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 #define MX5_CBCMR 0x00015154 #define MX5_CBCDR 0x02888945 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; 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)); } #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 PLLn. */ static uint32_t decode_pll(struct mxc_pll_reg *pll, uint32_t infreq) { 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; /* Sign extend */ if (mfn >= 0x04000000) { mfn |= 0xfc000000; mfn_abs = -mfn; } else mfn_abs = mfn; 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; } /* * Get mcu main rate */ u32 get_mcu_main_clk(void) { u32 reg, freq; 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. */ u32 get_periph_clk(void) { u32 reg; reg = readl(&mxc_ccm->cbcdr); if (!(reg & MXC_CCM_CBCDR_PERIPH_CLK_SEL)) 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], MXC_HCLK); case 1: return decode_pll(mxc_plls[PLL3_CLOCK], MXC_HCLK); case 2: return get_lp_apm(); default: return 0; } /* NOTREACHED */ } /* * Get the rate of ipg clock. */ static u32 get_ipg_clk(void) { uint32_t freq, reg, div; freq = get_ahb_clk(); reg = readl(&mxc_ccm->cbcdr); div = MXC_CCM_CBCDR_IPG_PODF_RD(reg) + 1; return freq / div; } /* * Get the rate of ipg_per clock. */ static u32 get_ipg_per_clk(void) { u32 freq, pred1, pred2, podf; if (readl(&mxc_ccm->cbcmr) & MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL) return get_ipg_clk(); 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 output clock rate of a standard PLL MUX for peripherals. */ static u32 get_standard_pll_sel_clk(u32 clk_sel) { u32 freq; switch (clk_sel & 0x3) { case 0: freq = decode_pll(mxc_plls[PLL1_CLOCK], MXC_HCLK); break; 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 3: freq = get_lp_apm(); break; } return freq; } /* * Get the rate of uart clk. */ static u32 get_uart_clk(void) { unsigned int clk_sel, freq, reg, pred, podf; 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; } /* * get cspi clock rate. */ static u32 imx_get_cspiclk(void) { 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; } 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 = get_axi_a_clk(); break; case 1: ret_val = get_axi_b_clk(); break; case 2: ret_val = get_emi_slow_clk(); break; case 3: ret_val = get_ahb_clk(); break; default: break; } return ret_val; } /* * The API of get mxc clocks. */ unsigned int mxc_get_clock(enum mxc_clock clk) { switch (clk) { case MXC_ARM_CLK: return get_mcu_main_clk(); case MXC_AHB_CLK: 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_FEC_CLK: return get_ipg_clk(); case MXC_SATA_CLK: return get_ahb_clk(); case MXC_DDR_CLK: return get_ddr_clk(); default: break; } return -EINVAL; } u32 imx_get_uartclk(void) { return get_uart_clk(); } u32 imx_get_fecclk(void) { 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) \ { \ writel(0x1232, &pll->ctrl); \ writel(0x2, &pll->config); \ writel((((pd) - 1) << 0) | ((fi) << 4), \ &pll->op); \ writel(fn, &(pll->mfn)); \ writel((fd) - 1, &pll->mfd); \ writel((((pd) - 1) << 0) | ((fi) << 4), \ &pll->hfs_op); \ writel(fn, &pll->hfs_mfn); \ writel((fd) - 1, &pll->hfs_mfd); \ writel(0x1232, &pll->ctrl); \ while (!readl(&pll->ctrl) & 0x1) \ ;\ } static int config_pll_clk(enum pll_clocks index, struct pll_param *pll_param) { u32 ccsr = readl(&mxc_ccm->ccsr); struct mxc_pll_reg *pll = mxc_plls[index]; switch (index) { case PLL1_CLOCK: /* Switch ARM to PLL2 clock */ writel(ccsr | MXC_CCM_CCSR_PLL1_SW_CLK_SEL, &mxc_ccm->ccsr); CHANGE_PLL_SETTINGS(pll, pll_param->pd, pll_param->mfi, pll_param->mfn, pll_param->mfd); /* Switch back */ writel(ccsr & ~MXC_CCM_CCSR_PLL1_SW_CLK_SEL, &mxc_ccm->ccsr); break; case PLL2_CLOCK: /* Switch to pll2 bypass clock */ writel(ccsr | MXC_CCM_CCSR_PLL2_SW_CLK_SEL, &mxc_ccm->ccsr); CHANGE_PLL_SETTINGS(pll, pll_param->pd, pll_param->mfi, pll_param->mfn, pll_param->mfd); /* Switch back */ writel(ccsr & ~MXC_CCM_CCSR_PLL2_SW_CLK_SEL, &mxc_ccm->ccsr); break; case PLL3_CLOCK: /* Switch to pll3 bypass clock */ writel(ccsr | MXC_CCM_CCSR_PLL3_SW_CLK_SEL, &mxc_ccm->ccsr); CHANGE_PLL_SETTINGS(pll, pll_param->pd, pll_param->mfi, pll_param->mfn, pll_param->mfd); /* Switch back */ writel(ccsr & ~MXC_CCM_CCSR_PLL3_SW_CLK_SEL, &mxc_ccm->ccsr); break; #ifdef CONFIG_MX53 case PLL4_CLOCK: /* Switch to pll4 bypass clock */ writel(ccsr | MXC_CCM_CCSR_PLL4_SW_CLK_SEL, &mxc_ccm->ccsr); CHANGE_PLL_SETTINGS(pll, pll_param->pd, pll_param->mfi, pll_param->mfn, pll_param->mfd); /* Switch back */ writel(ccsr & ~MXC_CCM_CCSR_PLL4_SW_CLK_SEL, &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: %d\n", ret); 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 = parent_rate / nfc_clk; if (nfc_clk <= 0) return -EINVAL; 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; } /* 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. */ int do_mx5_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { u32 freq; freq = decode_pll(mxc_plls[PLL1_CLOCK], MXC_HCLK); printf("PLL1 %8d MHz\n", freq / 1000000); freq = decode_pll(mxc_plls[PLL2_CLOCK], MXC_HCLK); printf("PLL2 %8d MHz\n", freq / 1000000); freq = decode_pll(mxc_plls[PLL3_CLOCK], MXC_HCLK); printf("PLL3 %8d MHz\n", freq / 1000000); #ifdef CONFIG_MX53 freq = decode_pll(mxc_plls[PLL4_CLOCK], MXC_HCLK); printf("PLL4 %8d MHz\n", freq / 1000000); #endif printf("\n"); printf("AHB %8d kHz\n", mxc_get_clock(MXC_AHB_CLK) / 1000); printf("IPG %8d kHz\n", mxc_get_clock(MXC_IPG_CLK) / 1000); printf("IPG PERCLK %8d kHz\n", mxc_get_clock(MXC_IPG_PERCLK) / 1000); printf("DDR %8d kHz\n", mxc_get_clock(MXC_DDR_CLK) / 1000); return 0; } /***************************************************/ U_BOOT_CMD( clocks, CONFIG_SYS_MAXARGS, 1, do_mx5_showclocks, "display clocks", "" );