X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farmv7%2Fmx6%2Fclock.c;h=bd65a08ba236f8afb0695c71e0d9c43defee14de;hb=f2f07e8553185022b16adb91581700c86dc3a09a;hp=3c0d908d179c9fd0fc79263950cc37a9fc6be76b;hpb=a19b0dd62d7b8efc658fa1aa685ff5665878f3ee;p=karo-tx-uboot.git diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c index 3c0d908d17..bd65a08ba2 100644 --- a/arch/arm/cpu/armv7/mx6/clock.c +++ b/arch/arm/cpu/armv7/mx6/clock.c @@ -1,26 +1,11 @@ /* * Copyright (C) 2010-2011 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 +#include #include #include #include @@ -64,7 +49,7 @@ void enable_usboh3_clk(unsigned char enable) } -#ifdef CONFIG_I2C_MXC +#ifdef CONFIG_SYS_I2C_MXC /* i2c_num can be from 0 - 2 */ int enable_i2c_clk(unsigned char enable, unsigned i2c_num) { @@ -110,12 +95,38 @@ static u32 decode_pll(enum pll_clocks pll, u32 infreq) div = __raw_readl(&imx_ccm->analog_pll_enet); div &= BM_ANADIG_PLL_ENET_DIV_SELECT; - return (div == 3 ? 125000000 : 25000000 * (div << 1)); + return 25000000 * (div + (div >> 1) + 1); default: return 0; } /* NOTREACHED */ } +static u32 mxc_get_pll_pfd(enum pll_clocks pll, int pfd_num) +{ + u32 div; + u64 freq; + + switch (pll) { + case PLL_BUS: + if (pfd_num == 3) { + /* No PFD3 on PPL2 */ + return 0; + } + div = __raw_readl(&imx_ccm->analog_pfd_528); + freq = (u64)decode_pll(PLL_BUS, MXC_HCLK); + break; + case PLL_USBOTG: + div = __raw_readl(&imx_ccm->analog_pfd_480); + freq = (u64)decode_pll(PLL_USBOTG, MXC_HCLK); + break; + default: + /* No PFD on other PLL */ + return 0; + } + + return lldiv(freq * 18, (div & ANATOP_PFD_FRAC_MASK(pfd_num)) >> + ANATOP_PFD_FRAC_SHIFT(pfd_num)); +} static u32 get_mcu_main_clk(void) { @@ -160,13 +171,14 @@ u32 get_periph_clk(void) freq = decode_pll(PLL_BUS, MXC_HCLK); break; case 1: - freq = PLL2_PFD2_FREQ; + freq = mxc_get_pll_pfd(PLL_BUS, 2); break; case 2: - freq = PLL2_PFD0_FREQ; + freq = mxc_get_pll_pfd(PLL_BUS, 0); break; case 3: - freq = PLL2_PFD2_DIV_FREQ; + /* static / 2 divider */ + freq = mxc_get_pll_pfd(PLL_BUS, 2) / 2; break; default: break; @@ -200,7 +212,7 @@ static u32 get_ipg_per_clk(void) static u32 get_uart_clk(void) { u32 reg, uart_podf; - u32 freq = PLL3_80M; + u32 freq = decode_pll(PLL_USBOTG, MXC_HCLK) / 6; /* static divider */ reg = __raw_readl(&imx_ccm->cscdr1); #ifdef CONFIG_MX6SL if (reg & MXC_CCM_CSCDR1_UART_CLK_SEL) @@ -220,7 +232,7 @@ static u32 get_cspi_clk(void) reg &= MXC_CCM_CSCDR2_ECSPI_CLK_PODF_MASK; cspi_podf = reg >> MXC_CCM_CSCDR2_ECSPI_CLK_PODF_OFFSET; - return PLL3_60M / (cspi_podf + 1); + return decode_pll(PLL_USBOTG, MXC_HCLK) / (8 * (cspi_podf + 1)); } static u32 get_axi_clk(void) @@ -233,9 +245,9 @@ static u32 get_axi_clk(void) if (cbcdr & MXC_CCM_CBCDR_AXI_SEL) { if (cbcdr & MXC_CCM_CBCDR_AXI_ALT_SEL) - root_freq = PLL2_PFD2_FREQ; + root_freq = mxc_get_pll_pfd(PLL_BUS, 2); else - root_freq = PLL3_PFD1_FREQ; + root_freq = mxc_get_pll_pfd(PLL_USBOTG, 1); } else root_freq = get_periph_clk(); @@ -244,13 +256,13 @@ static u32 get_axi_clk(void) static u32 get_emi_slow_clk(void) { - u32 emi_clk_sel, emi_slow_pof, cscmr1, root_freq = 0; + u32 emi_clk_sel, emi_slow_podf, cscmr1, root_freq = 0; cscmr1 = __raw_readl(&imx_ccm->cscmr1); emi_clk_sel = cscmr1 & MXC_CCM_CSCMR1_ACLK_EMI_SLOW_MASK; emi_clk_sel >>= MXC_CCM_CSCMR1_ACLK_EMI_SLOW_OFFSET; - emi_slow_pof = cscmr1 & MXC_CCM_CSCMR1_ACLK_EMI_SLOW_PODF_MASK; - emi_slow_pof >>= MXC_CCM_CSCMR1_ACLK_EMI_PODF_OFFSET; + emi_slow_podf = cscmr1 & MXC_CCM_CSCMR1_ACLK_EMI_SLOW_PODF_MASK; + emi_slow_podf >>= MXC_CCM_CSCMR1_ACLK_EMI_SLOW_PODF_OFFSET; switch (emi_clk_sel) { case 0: @@ -260,14 +272,14 @@ static u32 get_emi_slow_clk(void) root_freq = decode_pll(PLL_USBOTG, MXC_HCLK); break; case 2: - root_freq = PLL2_PFD2_FREQ; + root_freq = mxc_get_pll_pfd(PLL_BUS, 2); break; case 3: - root_freq = PLL2_PFD0_FREQ; + root_freq = mxc_get_pll_pfd(PLL_BUS, 0); break; } - return root_freq / (emi_slow_pof + 1); + return root_freq / (emi_slow_podf + 1); } #ifdef CONFIG_MX6SL @@ -286,13 +298,14 @@ static u32 get_mmdc_ch0_clk(void) freq = decode_pll(PLL_BUS, MXC_HCLK); break; case 1: - freq = PLL2_PFD2_FREQ; + freq = mxc_get_pll_pfd(PLL_BUS, 2); break; case 2: - freq = PLL2_PFD0_FREQ; + freq = mxc_get_pll_pfd(PLL_BUS, 0); break; case 3: - freq = PLL2_PFD2_DIV_FREQ; + /* static / 2 divider */ + freq = mxc_get_pll_pfd(PLL_BUS, 2) / 2; } return freq / (podf + 1); @@ -309,6 +322,43 @@ static u32 get_mmdc_ch0_clk(void) } #endif +#ifdef CONFIG_FEC_MXC +int enable_fec_anatop_clock(enum enet_freq freq) +{ + u32 reg = 0; + s32 timeout = 100000; + + struct anatop_regs __iomem *anatop = + (struct anatop_regs __iomem *)ANATOP_BASE_ADDR; + + if (freq < ENET_25MHz || freq > ENET_125MHz) + return -EINVAL; + + reg = readl(&anatop->pll_enet); + reg &= ~BM_ANADIG_PLL_ENET_DIV_SELECT; + reg |= freq; + + if ((reg & BM_ANADIG_PLL_ENET_POWERDOWN) || + (!(reg & BM_ANADIG_PLL_ENET_LOCK))) { + reg &= ~BM_ANADIG_PLL_ENET_POWERDOWN; + writel(reg, &anatop->pll_enet); + while (timeout--) { + if (readl(&anatop->pll_enet) & BM_ANADIG_PLL_ENET_LOCK) + break; + } + if (timeout < 0) + return -ETIMEDOUT; + } + + /* Enable FEC clock */ + reg |= BM_ANADIG_PLL_ENET_ENABLE; + reg &= ~BM_ANADIG_PLL_ENET_BYPASS; + writel(reg, &anatop->pll_enet); + + return 0; +} +#endif + static u32 get_usdhc_clk(u32 port) { u32 root_freq = 0, usdhc_podf = 0, clk_sel = 0; @@ -345,9 +395,9 @@ static u32 get_usdhc_clk(u32 port) } if (clk_sel) - root_freq = PLL2_PFD0_FREQ; + root_freq = mxc_get_pll_pfd(PLL_BUS, 0); else - root_freq = PLL2_PFD2_FREQ; + root_freq = mxc_get_pll_pfd(PLL_BUS, 2); return root_freq / (usdhc_podf + 1); } @@ -359,20 +409,15 @@ u32 imx_get_uartclk(void) u32 imx_get_fecclk(void) { - return decode_pll(PLL_ENET, MXC_HCLK); + return mxc_get_clock(MXC_IPG_CLK); } -int enable_sata_clock(void) +static int enable_enet_pll(uint32_t en) { - u32 reg = 0; - s32 timeout = 100000; struct mxc_ccm_reg *const imx_ccm = (struct mxc_ccm_reg *) CCM_BASE_ADDR; - - /* Enable sata clock */ - reg = readl(&imx_ccm->CCGR5); /* CCGR5 */ - reg |= MXC_CCM_CCGR5_SATA_MASK; - writel(reg, &imx_ccm->CCGR5); + s32 timeout = 100000; + u32 reg = 0; /* Enable PLLs */ reg = readl(&imx_ccm->analog_pll_enet); @@ -387,10 +432,70 @@ int enable_sata_clock(void) return -EIO; reg &= ~BM_ANADIG_PLL_SYS_BYPASS; writel(reg, &imx_ccm->analog_pll_enet); - reg |= BM_ANADIG_PLL_ENET_ENABLE_SATA; + reg |= en; writel(reg, &imx_ccm->analog_pll_enet); + return 0; +} + +static void ungate_sata_clock(void) +{ + struct mxc_ccm_reg *const imx_ccm = + (struct mxc_ccm_reg *)CCM_BASE_ADDR; - return 0 ; + /* Enable SATA clock. */ + setbits_le32(&imx_ccm->CCGR5, MXC_CCM_CCGR5_SATA_MASK); +} + +static void ungate_pcie_clock(void) +{ + struct mxc_ccm_reg *const imx_ccm = + (struct mxc_ccm_reg *)CCM_BASE_ADDR; + + /* Enable PCIe clock. */ + setbits_le32(&imx_ccm->CCGR4, MXC_CCM_CCGR4_PCIE_MASK); +} + +int enable_sata_clock(void) +{ + ungate_sata_clock(); + return enable_enet_pll(BM_ANADIG_PLL_ENET_ENABLE_SATA); +} + +int enable_pcie_clock(void) +{ + struct anatop_regs *anatop_regs = + (struct anatop_regs *)ANATOP_BASE_ADDR; + struct mxc_ccm_reg *ccm_regs = (struct mxc_ccm_reg *)CCM_BASE_ADDR; + + /* + * Here be dragons! + * + * The register ANATOP_MISC1 is not documented in the Freescale + * MX6RM. The register that is mapped in the ANATOP space and + * marked as ANATOP_MISC1 is actually documented in the PMU section + * of the datasheet as PMU_MISC1. + * + * Switch LVDS clock source to SATA (0xb), disable clock INPUT and + * enable clock OUTPUT. This is important for PCI express link that + * is clocked from the i.MX6. + */ +#define ANADIG_ANA_MISC1_LVDSCLK1_IBEN (1 << 12) +#define ANADIG_ANA_MISC1_LVDSCLK1_OBEN (1 << 10) +#define ANADIG_ANA_MISC1_LVDS1_CLK_SEL_MASK 0x0000001F + clrsetbits_le32(&anatop_regs->ana_misc1, + ANADIG_ANA_MISC1_LVDSCLK1_IBEN | + ANADIG_ANA_MISC1_LVDS1_CLK_SEL_MASK, + ANADIG_ANA_MISC1_LVDSCLK1_OBEN | 0xb); + + /* PCIe reference clock sourced from AXI. */ + clrbits_le32(&ccm_regs->cbcmr, MXC_CCM_CBCMR_PCIE_AXI_CLK_SEL); + + /* Party time! Ungate the clock to the PCIe. */ + ungate_sata_clock(); + ungate_pcie_clock(); + + return enable_enet_pll(BM_ANADIG_PLL_ENET_ENABLE_SATA | + BM_ANADIG_PLL_ENET_ENABLE_PCIE); } unsigned int mxc_get_clock(enum mxc_clock clk) @@ -468,6 +573,14 @@ int do_mx6_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) return 0; } +void enable_ipu_clock(void) +{ + struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR; + int reg; + reg = readl(&mxc_ccm->CCGR3); + reg |= MXC_CCM_CCGR3_IPU1_IPU_MASK; + writel(reg, &mxc_ccm->CCGR3); +} /***************************************************/ U_BOOT_CMD(