/* * clock_ti816x.c * * Clocks for TI816X based boards * * Copyright (C) 2013, Adeneo Embedded * Antoine Tenart, * * Based on TI-PSP-04.00.02.14 : * * Copyright (C) 2009, Texas Instruments, Incorporated * * 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. */ #include #include #include #include #include #include #include #include #define CM_PLL_BASE (CTRL_BASE + 0x0400) /* Main PLL */ #define MAIN_N 64 #define MAIN_P 0x1 #define MAIN_INTFREQ1 0x8 #define MAIN_FRACFREQ1 0x800000 #define MAIN_MDIV1 0x2 #define MAIN_INTFREQ2 0xE #define MAIN_FRACFREQ2 0x0 #define MAIN_MDIV2 0x1 #define MAIN_INTFREQ3 0x8 #define MAIN_FRACFREQ3 0xAAAAB0 #define MAIN_MDIV3 0x3 #define MAIN_INTFREQ4 0x9 #define MAIN_FRACFREQ4 0x55554F #define MAIN_MDIV4 0x3 #define MAIN_INTFREQ5 0x9 #define MAIN_FRACFREQ5 0x374BC6 #define MAIN_MDIV5 0xC #define MAIN_MDIV6 0x48 #define MAIN_MDIV7 0x4 /* DDR PLL */ #define DDR_N 59 #define DDR_P 0x1 #define DDR_MDIV1 0x2 #define DDR_INTFREQ2 0x8 #define DDR_FRACFREQ2 0xD99999 #define DDR_MDIV2 0x1E #define DDR_INTFREQ3 0x8 #define DDR_FRACFREQ3 0x0 #define DDR_MDIV3 0x4 #define DDR_INTFREQ4 0xE /* Expansion DDR clk */ #define DDR_FRACFREQ4 0x0 #define DDR_MDIV4 0x4 #define DDR_INTFREQ5 0xE /* Expansion DDR clk */ #define DDR_FRACFREQ5 0x0 #define DDR_MDIV5 0x4 #define CONTROL_STATUS (CTRL_BASE + 0x40) #define DDR_RCD (CTRL_BASE + 0x070C) #define CM_TIMER1_CLKSEL (PRCM_BASE + 0x390) #define CM_ALWON_CUST_EFUSE_CLKCTRL (PRCM_BASE + 0x1628) #define INTCPS_SYSCONFIG 0x48200010 #define CM_SYSCLK10_CLKSEL 0x48180324 struct cm_pll { unsigned int mainpll_ctrl; /* offset 0x400 */ unsigned int mainpll_pwd; unsigned int mainpll_freq1; unsigned int mainpll_div1; unsigned int mainpll_freq2; unsigned int mainpll_div2; unsigned int mainpll_freq3; unsigned int mainpll_div3; unsigned int mainpll_freq4; unsigned int mainpll_div4; unsigned int mainpll_freq5; unsigned int mainpll_div5; unsigned int resv0[1]; unsigned int mainpll_div6; unsigned int resv1[1]; unsigned int mainpll_div7; unsigned int ddrpll_ctrl; /* offset 0x440 */ unsigned int ddrpll_pwd; unsigned int resv2[1]; unsigned int ddrpll_div1; unsigned int ddrpll_freq2; unsigned int ddrpll_div2; unsigned int ddrpll_freq3; unsigned int ddrpll_div3; unsigned int ddrpll_freq4; unsigned int ddrpll_div4; unsigned int ddrpll_freq5; unsigned int ddrpll_div5; unsigned int videopll_ctrl; /* offset 0x470 */ unsigned int videopll_pwd; unsigned int videopll_freq1; unsigned int videopll_div1; unsigned int videopll_freq2; unsigned int videopll_div2; unsigned int videopll_freq3; unsigned int videopll_div3; unsigned int resv3[4]; unsigned int audiopll_ctrl; /* offset 0x4A0 */ unsigned int audiopll_pwd; unsigned int resv4[2]; unsigned int audiopll_freq2; unsigned int audiopll_div2; unsigned int audiopll_freq3; unsigned int audiopll_div3; unsigned int audiopll_freq4; unsigned int audiopll_div4; unsigned int audiopll_freq5; unsigned int audiopll_div5; }; const struct cm_alwon *cmalwon = (struct cm_alwon *)CM_ALWON_BASE; const struct cm_def *cmdef = (struct cm_def *)CM_DEFAULT_BASE; const struct cm_pll *cmpll = (struct cm_pll *)CM_PLL_BASE; const struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE; void enable_dmm_clocks(void) { writel(PRCM_MOD_EN, &cmdef->dmmclkctrl); /* Wait for dmm to be fully functional, including OCP */ while (((readl(&cmdef->dmmclkctrl) >> 17) & 0x3) != 0) ; } void enable_emif_clocks(void) { writel(PRCM_MOD_EN, &cmdef->fwclkctrl); writel(PRCM_MOD_EN, &cmdef->l3fastclkstctrl); writel(PRCM_MOD_EN, &cmdef->emif0clkctrl); writel(PRCM_MOD_EN, &cmdef->emif1clkctrl); /* Wait for clocks to be active */ while ((readl(&cmdef->l3fastclkstctrl) & 0x300) != 0x300) ; /* Wait for emif0 to be fully functional, including OCP */ while (((readl(&cmdef->emif0clkctrl) >> 17) & 0x3) != 0) ; /* Wait for emif1 to be fully functional, including OCP */ while (((readl(&cmdef->emif1clkctrl) >> 17) & 0x3) != 0) ; } /* assume delay is aprox at least 1us */ static void ddr_delay(int d) { int i; /* * read a control register. * this is a bit more delay and cannot be optimized by the compiler * assuming one read takes 200 cycles and A8 is runing 1 GHz * somewhat conservative setting */ for (i = 0; i < 50*d; i++) readl(CONTROL_STATUS); } static void main_pll_init_ti816x(void) { u32 main_pll_ctrl = 0; /* Put the PLL in bypass mode by setting BIT2 in its ctrl reg */ main_pll_ctrl = readl(&cmpll->mainpll_ctrl); main_pll_ctrl &= 0xFFFFFFFB; main_pll_ctrl |= BIT(2); writel(main_pll_ctrl, &cmpll->mainpll_ctrl); /* Enable PLL by setting BIT3 in its ctrl reg */ main_pll_ctrl = readl(&cmpll->mainpll_ctrl); main_pll_ctrl &= 0xFFFFFFF7; main_pll_ctrl |= BIT(3); writel(main_pll_ctrl, &cmpll->mainpll_ctrl); /* Write the values of N,P in the CTRL reg */ main_pll_ctrl = readl(&cmpll->mainpll_ctrl); main_pll_ctrl &= 0xFF; main_pll_ctrl |= (MAIN_N<<16 | MAIN_P<<8); writel(main_pll_ctrl, &cmpll->mainpll_ctrl); /* Power up clock1-7 */ writel(0x0, &cmpll->mainpll_pwd); /* Program the freq and divider values for clock1-7 */ writel((1<<31 | 1<<28 | (MAIN_INTFREQ1<<24) | MAIN_FRACFREQ1), &cmpll->mainpll_freq1); writel(((1<<8) | MAIN_MDIV1), &cmpll->mainpll_div1); writel((1<<31 | 1<<28 | (MAIN_INTFREQ2<<24) | MAIN_FRACFREQ2), &cmpll->mainpll_freq2); writel(((1<<8) | MAIN_MDIV2), &cmpll->mainpll_div2); writel((1<<31 | 1<<28 | (MAIN_INTFREQ3<<24) | MAIN_FRACFREQ3), &cmpll->mainpll_freq3); writel(((1<<8) | MAIN_MDIV3), &cmpll->mainpll_div3); writel((1<<31 | 1<<28 | (MAIN_INTFREQ4<<24) | MAIN_FRACFREQ4), &cmpll->mainpll_freq4); writel(((1<<8) | MAIN_MDIV4), &cmpll->mainpll_div4); writel((1<<31 | 1<<28 | (MAIN_INTFREQ5<<24) | MAIN_FRACFREQ5), &cmpll->mainpll_freq5); writel(((1<<8) | MAIN_MDIV5), &cmpll->mainpll_div5); writel((1<<8 | MAIN_MDIV6), &cmpll->mainpll_div6); writel((1<<8 | MAIN_MDIV7), &cmpll->mainpll_div7); /* Wait for PLL to lock */ while ((readl(&cmpll->mainpll_ctrl) & BIT(7)) != BIT(7)) ; /* Put the PLL in normal mode, disable bypass */ main_pll_ctrl = readl(&cmpll->mainpll_ctrl); main_pll_ctrl &= 0xFFFFFFFB; writel(main_pll_ctrl, &cmpll->mainpll_ctrl); } static void ddr_pll_bypass_ti816x(void) { u32 ddr_pll_ctrl = 0; /* Put the PLL in bypass mode by setting BIT2 in its ctrl reg */ ddr_pll_ctrl = readl(&cmpll->ddrpll_ctrl); ddr_pll_ctrl &= 0xFFFFFFFB; ddr_pll_ctrl |= BIT(2); writel(ddr_pll_ctrl, &cmpll->ddrpll_ctrl); } static void ddr_pll_init_ti816x(void) { u32 ddr_pll_ctrl = 0; /* Enable PLL by setting BIT3 in its ctrl reg */ ddr_pll_ctrl = readl(&cmpll->ddrpll_ctrl); ddr_pll_ctrl &= 0xFFFFFFF7; ddr_pll_ctrl |= BIT(3); writel(ddr_pll_ctrl, &cmpll->ddrpll_ctrl); /* Write the values of N,P in the CTRL reg */ ddr_pll_ctrl = readl(&cmpll->ddrpll_ctrl); ddr_pll_ctrl &= 0xFF; ddr_pll_ctrl |= (DDR_N<<16 | DDR_P<<8); writel(ddr_pll_ctrl, &cmpll->ddrpll_ctrl); ddr_delay(10); /* Power up clock1-5 */ writel(0x0, &cmpll->ddrpll_pwd); /* Program the freq and divider values for clock1-3 */ writel(((0<<8) | DDR_MDIV1), &cmpll->ddrpll_div1); ddr_delay(1); writel(((1<<8) | DDR_MDIV1), &cmpll->ddrpll_div1); writel((1<<31 | 1<<28 | (DDR_INTFREQ2<<24) | DDR_FRACFREQ2), &cmpll->ddrpll_freq2); writel(((1<<8) | DDR_MDIV2), &cmpll->ddrpll_div2); writel(((0<<8) | DDR_MDIV3), &cmpll->ddrpll_div3); ddr_delay(1); writel(((1<<8) | DDR_MDIV3), &cmpll->ddrpll_div3); ddr_delay(1); writel((0<<31 | 1<<28 | (DDR_INTFREQ3<<24) | DDR_FRACFREQ3), &cmpll->ddrpll_freq3); ddr_delay(1); writel((1<<31 | 1<<28 | (DDR_INTFREQ3<<24) | DDR_FRACFREQ3), &cmpll->ddrpll_freq3); ddr_delay(5); /* Wait for PLL to lock */ while ((readl(&cmpll->ddrpll_ctrl) & BIT(7)) != BIT(7)) ; /* Power up RCD */ writel(BIT(0), DDR_RCD); } static void peripheral_enable(void) { /* Wake-up the l3_slow clock */ writel(PRCM_MOD_EN, &cmalwon->l3slowclkstctrl); /* * Note on Timers: * There are 8 timers(0-7) out of which timer 0 is a secure timer. * Timer 0 mux should not be changed * * To access the timer registers we need the to be * enabled which is what we do in the first step */ /* Enable timer1 */ writel(PRCM_MOD_EN, &cmalwon->timer1clkctrl); /* Select timer1 clock to be CLKIN (27MHz) */ writel(BIT(1), CM_TIMER1_CLKSEL); /* Wait for timer1 to be ON-ACTIVE */ while (((readl(&cmalwon->l3slowclkstctrl) & (0x80000<<1))>>20) != 1) ; /* Wait for timer1 to be enabled */ while (((readl(&cmalwon->timer1clkctrl) & 0x30000)>>16) != 0) ; /* Active posted mode */ writel(PRCM_MOD_EN, (DM_TIMER1_BASE + 0x54)); while (readl(DM_TIMER1_BASE + 0x10) & BIT(0)) ; /* Start timer1 */ writel(BIT(0), (DM_TIMER1_BASE + 0x38)); /* eFuse */ writel(PRCM_MOD_EN, CM_ALWON_CUST_EFUSE_CLKCTRL); while (readl(CM_ALWON_CUST_EFUSE_CLKCTRL) != PRCM_MOD_EN) ; /* Enable gpio0 */ writel(PRCM_MOD_EN, &cmalwon->gpio0clkctrl); while (readl(&cmalwon->gpio0clkctrl) != PRCM_MOD_EN) ; writel((BIT(1) | BIT(8)), &cmalwon->gpio0clkctrl); /* Enable gpio1 */ writel(PRCM_MOD_EN, &cmalwon->gpio1clkctrl); while (readl(&cmalwon->gpio1clkctrl) != PRCM_MOD_EN) ; writel((BIT(1) | BIT(8)), &cmalwon->gpio1clkctrl); /* Enable spi */ writel(PRCM_MOD_EN, &cmalwon->spiclkctrl); while (readl(&cmalwon->spiclkctrl) != PRCM_MOD_EN) ; /* Enable i2c0 */ writel(PRCM_MOD_EN, &cmalwon->i2c0clkctrl); while (readl(&cmalwon->i2c0clkctrl) != PRCM_MOD_EN) ; /* Enable ethernet0 */ writel(PRCM_MOD_EN, &cmalwon->ethclkstctrl); writel(PRCM_MOD_EN, &cmalwon->ethernet0clkctrl); writel(PRCM_MOD_EN, &cmalwon->ethernet1clkctrl); /* Enable hsmmc */ writel(PRCM_MOD_EN, &cmalwon->sdioclkctrl); while (readl(&cmalwon->sdioclkctrl) != PRCM_MOD_EN) ; } void setup_clocks_for_console(void) { /* Fix ROM code bug - from TI-PSP-04.00.02.14 */ writel(0x0, CM_SYSCLK10_CLKSEL); ddr_pll_bypass_ti816x(); /* Enable uart0-2 */ writel(PRCM_MOD_EN, &cmalwon->uart0clkctrl); while (readl(&cmalwon->uart0clkctrl) != PRCM_MOD_EN) ; writel(PRCM_MOD_EN, &cmalwon->uart1clkctrl); while (readl(&cmalwon->uart1clkctrl) != PRCM_MOD_EN) ; writel(PRCM_MOD_EN, &cmalwon->uart2clkctrl); while (readl(&cmalwon->uart2clkctrl) != PRCM_MOD_EN) ; while ((readl(&cmalwon->l3slowclkstctrl) & 0x2100) != 0x2100) ; } void setup_early_clocks(void) { setup_clocks_for_console(); } void prcm_init(void) { /* Enable the control */ writel(PRCM_MOD_EN, &cmalwon->controlclkctrl); main_pll_init_ti816x(); ddr_pll_init_ti816x(); /* * With clk freqs setup to desired values, * enable the required peripherals */ peripheral_enable(); }