/* * (C) Copyright 2008 * Texas Instruments, * * Author : * Manikandan Pillai * * Derived from Beagle Board and OMAP3 SDP code by * Richard Woodruff * Syed Mohammed Khasim * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include #include #include /****************************************************************************** * get_sys_clk_speed() - determine reference oscillator speed * based on known 32kHz clock and gptimer. *****************************************************************************/ u32 get_osc_clk_speed(void) { u32 start, cstart, cend, cdiff, cdiv, val; struct prcm *prcm_base = (struct prcm *)PRCM_BASE; struct prm *prm_base = (struct prm *)PRM_BASE; struct gptimer *gpt1_base = (struct gptimer *)OMAP34XX_GPT1; struct s32ktimer *s32k_base = (struct s32ktimer *)SYNC_32KTIMER_BASE; val = readl(&prm_base->clksrc_ctrl); if (val & SYSCLKDIV_2) cdiv = 2; else cdiv = 1; /* enable timer2 */ val = readl(&prcm_base->clksel_wkup) | CLKSEL_GPT1; /* select sys_clk for GPT1 */ writel(val, &prcm_base->clksel_wkup); /* Enable I and F Clocks for GPT1 */ val = readl(&prcm_base->iclken_wkup) | EN_GPT1 | EN_32KSYNC; writel(val, &prcm_base->iclken_wkup); val = readl(&prcm_base->fclken_wkup) | EN_GPT1; writel(val, &prcm_base->fclken_wkup); writel(0, &gpt1_base->tldr); /* start counting at 0 */ writel(GPT_EN, &gpt1_base->tclr); /* enable clock */ /* enable 32kHz source, determine sys_clk via gauging */ /* start time in 20 cycles */ start = 20 + readl(&s32k_base->s32k_cr); /* dead loop till start time */ while (readl(&s32k_base->s32k_cr) < start); /* get start sys_clk count */ cstart = readl(&gpt1_base->tcrr); /* wait for 40 cycles */ while (readl(&s32k_base->s32k_cr) < (start + 20)) ; cend = readl(&gpt1_base->tcrr); /* get end sys_clk count */ cdiff = cend - cstart; /* get elapsed ticks */ cdiff *= cdiv; /* based on number of ticks assign speed */ if (cdiff > 19000) return S38_4M; else if (cdiff > 15200) return S26M; else if (cdiff > 13000) return S24M; else if (cdiff > 9000) return S19_2M; else if (cdiff > 7600) return S13M; else return S12M; } /****************************************************************************** * get_sys_clkin_sel() - returns the sys_clkin_sel field value based on * input oscillator clock frequency. *****************************************************************************/ void get_sys_clkin_sel(u32 osc_clk, u32 *sys_clkin_sel) { switch(osc_clk) { case S38_4M: *sys_clkin_sel = 4; break; case S26M: *sys_clkin_sel = 3; break; case S19_2M: *sys_clkin_sel = 2; break; case S13M: *sys_clkin_sel = 1; break; case S12M: default: *sys_clkin_sel = 0; } } /* * OMAP34XX/35XX specific functions */ static void dpll3_init_34xx(u32 sil_index, u32 clk_index) { struct prcm *prcm_base = (struct prcm *)PRCM_BASE; dpll_param *ptr = (dpll_param *) get_core_dpll_param(); void (*f_lock_pll) (u32, u32, u32, u32); int xip_safe, p0, p1, p2, p3; xip_safe = is_running_in_sram(); /* Moving to the right sysclk and ES rev base */ ptr = ptr + (3 * clk_index) + sil_index; if (xip_safe) { /* * CORE DPLL * sr32(CM_CLKSEL2_EMU) set override to work when asleep */ sr32(&prcm_base->clken_pll, 0, 3, PLL_FAST_RELOCK_BYPASS); wait_on_value(ST_CORE_CLK, 0, &prcm_base->idlest_ckgen, LDELAY); /* * For OMAP3 ES1.0 Errata 1.50, default value directly doesn't * work. write another value and then default value. */ /* CM_CLKSEL1_EMU[DIV_DPLL3] */ sr32(&prcm_base->clksel1_emu, 16, 5, (CORE_M3X2 + 1)) ; sr32(&prcm_base->clksel1_emu, 16, 5, CORE_M3X2); /* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */ sr32(&prcm_base->clksel1_pll, 27, 5, ptr->m2); /* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */ sr32(&prcm_base->clksel1_pll, 16, 11, ptr->m); /* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */ sr32(&prcm_base->clksel1_pll, 8, 7, ptr->n); /* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */ sr32(&prcm_base->clksel1_pll, 6, 1, 0); /* SSI */ sr32(&prcm_base->clksel_core, 8, 4, CORE_SSI_DIV); /* FSUSB */ sr32(&prcm_base->clksel_core, 4, 2, CORE_FUSB_DIV); /* L4 */ sr32(&prcm_base->clksel_core, 2, 2, CORE_L4_DIV); /* L3 */ sr32(&prcm_base->clksel_core, 0, 2, CORE_L3_DIV); /* GFX */ sr32(&prcm_base->clksel_gfx, 0, 3, GFX_DIV); /* RESET MGR */ sr32(&prcm_base->clksel_wkup, 1, 2, WKUP_RSM); /* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */ sr32(&prcm_base->clken_pll, 4, 4, ptr->fsel); /* LOCK MODE */ sr32(&prcm_base->clken_pll, 0, 3, PLL_LOCK); wait_on_value(ST_CORE_CLK, 1, &prcm_base->idlest_ckgen, LDELAY); } else if (is_running_in_flash()) { /* * if running from flash, jump to small relocated code * area in SRAM. */ f_lock_pll = (void *) (SRAM_CLK_CODE); p0 = readl(&prcm_base->clken_pll); sr32(&p0, 0, 3, PLL_FAST_RELOCK_BYPASS); /* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */ sr32(&p0, 4, 4, ptr->fsel); p1 = readl(&prcm_base->clksel1_pll); /* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */ sr32(&p1, 27, 5, ptr->m2); /* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */ sr32(&p1, 16, 11, ptr->m); /* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */ sr32(&p1, 8, 7, ptr->n); /* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */ sr32(&p1, 6, 1, 0); p2 = readl(&prcm_base->clksel_core); /* SSI */ sr32(&p2, 8, 4, CORE_SSI_DIV); /* FSUSB */ sr32(&p2, 4, 2, CORE_FUSB_DIV); /* L4 */ sr32(&p2, 2, 2, CORE_L4_DIV); /* L3 */ sr32(&p2, 0, 2, CORE_L3_DIV); p3 = (u32)&prcm_base->idlest_ckgen; (*f_lock_pll) (p0, p1, p2, p3); } } static void dpll4_init_34xx(u32 sil_index, u32 clk_index) { struct prcm *prcm_base = (struct prcm *)PRCM_BASE; dpll_param *ptr = (dpll_param *) get_per_dpll_param(); /* Moving it to the right sysclk base */ ptr = ptr + clk_index; /* EN_PERIPH_DPLL: CM_CLKEN_PLL[16:18] */ sr32(&prcm_base->clken_pll, 16, 3, PLL_STOP); wait_on_value(ST_PERIPH_CLK, 0, &prcm_base->idlest_ckgen, LDELAY); /* * Errata 1.50 Workaround for OMAP3 ES1.0 only * If using default divisors, write default divisor + 1 * and then the actual divisor value */ /* M6 */ sr32(&prcm_base->clksel1_emu, 24, 5, (PER_M6X2 + 1)); sr32(&prcm_base->clksel1_emu, 24, 5, PER_M6X2); /* M5 */ sr32(&prcm_base->clksel_cam, 0, 5, (PER_M5X2 + 1)); sr32(&prcm_base->clksel_cam, 0, 5, PER_M5X2); /* M4 */ sr32(&prcm_base->clksel_dss, 0, 5, (PER_M4X2 + 1)); sr32(&prcm_base->clksel_dss, 0, 5, PER_M4X2); /* M3 */ sr32(&prcm_base->clksel_dss, 8, 5, (PER_M3X2 + 1)); sr32(&prcm_base->clksel_dss, 8, 5, PER_M3X2); /* M2 (DIV_96M): CM_CLKSEL3_PLL[0:4] */ sr32(&prcm_base->clksel3_pll, 0, 5, (ptr->m2 + 1)); sr32(&prcm_base->clksel3_pll, 0, 5, ptr->m2); /* Workaround end */ /* M (PERIPH_DPLL_MULT): CM_CLKSEL2_PLL[8:18] */ sr32(&prcm_base->clksel2_pll, 8, 11, ptr->m); /* N (PERIPH_DPLL_DIV): CM_CLKSEL2_PLL[0:6] */ sr32(&prcm_base->clksel2_pll, 0, 7, ptr->n); /* FREQSEL (PERIPH_DPLL_FREQSEL): CM_CLKEN_PLL[20:23] */ sr32(&prcm_base->clken_pll, 20, 4, ptr->fsel); /* LOCK MODE (EN_PERIPH_DPLL): CM_CLKEN_PLL[16:18] */ sr32(&prcm_base->clken_pll, 16, 3, PLL_LOCK); wait_on_value(ST_PERIPH_CLK, 2, &prcm_base->idlest_ckgen, LDELAY); } static void dpll5_init_34xx(u32 sil_index, u32 clk_index) { struct prcm *prcm_base = (struct prcm *)PRCM_BASE; dpll_param *ptr = (dpll_param *) get_per2_dpll_param(); /* Moving it to the right sysclk base */ ptr = ptr + clk_index; /* PER2 DPLL (DPLL5) */ sr32(&prcm_base->clken2_pll, 0, 3, PLL_STOP); wait_on_value(1, 0, &prcm_base->idlest2_ckgen, LDELAY); sr32(&prcm_base->clksel5_pll, 0, 5, ptr->m2); /* set M2 (usbtll_fck) */ sr32(&prcm_base->clksel4_pll, 8, 11, ptr->m); /* set m (11-bit multiplier) */ sr32(&prcm_base->clksel4_pll, 0, 7, ptr->n); /* set n (7-bit divider)*/ sr32(&prcm_base->clken_pll, 4, 4, ptr->fsel); /* FREQSEL */ sr32(&prcm_base->clken2_pll, 0, 3, PLL_LOCK); /* lock mode */ wait_on_value(1, 1, &prcm_base->idlest2_ckgen, LDELAY); } static void mpu_init_34xx(u32 sil_index, u32 clk_index) { struct prcm *prcm_base = (struct prcm *)PRCM_BASE; dpll_param *ptr = (dpll_param *) get_mpu_dpll_param(); /* Moving to the right sysclk and ES rev base */ ptr = ptr + (3 * clk_index) + sil_index; /* MPU DPLL (unlocked already) */ /* M2 (MPU_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_MPU[0:4] */ sr32(&prcm_base->clksel2_pll_mpu, 0, 5, ptr->m2); /* M (MPU_DPLL_MULT) : CM_CLKSEL2_PLL_MPU[8:18] */ sr32(&prcm_base->clksel1_pll_mpu, 8, 11, ptr->m); /* N (MPU_DPLL_DIV) : CM_CLKSEL2_PLL_MPU[0:6] */ sr32(&prcm_base->clksel1_pll_mpu, 0, 7, ptr->n); /* FREQSEL (MPU_DPLL_FREQSEL) : CM_CLKEN_PLL_MPU[4:7] */ sr32(&prcm_base->clken_pll_mpu, 4, 4, ptr->fsel); } static void iva_init_34xx(u32 sil_index, u32 clk_index) { struct prcm *prcm_base = (struct prcm *)PRCM_BASE; dpll_param *ptr = (dpll_param *) get_iva_dpll_param(); /* Moving to the right sysclk and ES rev base */ ptr = ptr + (3 * clk_index) + sil_index; /* IVA DPLL */ /* EN_IVA2_DPLL : CM_CLKEN_PLL_IVA2[0:2] */ sr32(&prcm_base->clken_pll_iva2, 0, 3, PLL_STOP); wait_on_value(ST_IVA2_CLK, 0, &prcm_base->idlest_pll_iva2, LDELAY); /* M2 (IVA2_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_IVA2[0:4] */ sr32(&prcm_base->clksel2_pll_iva2, 0, 5, ptr->m2); /* M (IVA2_DPLL_MULT) : CM_CLKSEL1_PLL_IVA2[8:18] */ sr32(&prcm_base->clksel1_pll_iva2, 8, 11, ptr->m); /* N (IVA2_DPLL_DIV) : CM_CLKSEL1_PLL_IVA2[0:6] */ sr32(&prcm_base->clksel1_pll_iva2, 0, 7, ptr->n); /* FREQSEL (IVA2_DPLL_FREQSEL) : CM_CLKEN_PLL_IVA2[4:7] */ sr32(&prcm_base->clken_pll_iva2, 4, 4, ptr->fsel); /* LOCK MODE (EN_IVA2_DPLL) : CM_CLKEN_PLL_IVA2[0:2] */ sr32(&prcm_base->clken_pll_iva2, 0, 3, PLL_LOCK); wait_on_value(ST_IVA2_CLK, 1, &prcm_base->idlest_pll_iva2, LDELAY); } /* * OMAP3630 specific functions */ static void dpll3_init_36xx(u32 sil_index, u32 clk_index) { struct prcm *prcm_base = (struct prcm *)PRCM_BASE; dpll_param *ptr = (dpll_param *) get_36x_core_dpll_param(); void (*f_lock_pll) (u32, u32, u32, u32); int xip_safe, p0, p1, p2, p3; xip_safe = is_running_in_sram(); /* Moving it to the right sysclk base */ ptr += clk_index; if (xip_safe) { /* CORE DPLL */ /* Select relock bypass: CM_CLKEN_PLL[0:2] */ sr32(&prcm_base->clken_pll, 0, 3, PLL_FAST_RELOCK_BYPASS); wait_on_value(ST_CORE_CLK, 0, &prcm_base->idlest_ckgen, LDELAY); /* CM_CLKSEL1_EMU[DIV_DPLL3] */ sr32(&prcm_base->clksel1_emu, 16, 5, CORE_M3X2); /* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */ sr32(&prcm_base->clksel1_pll, 27, 5, ptr->m2); /* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */ sr32(&prcm_base->clksel1_pll, 16, 11, ptr->m); /* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */ sr32(&prcm_base->clksel1_pll, 8, 7, ptr->n); /* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */ sr32(&prcm_base->clksel1_pll, 6, 1, 0); /* SSI */ sr32(&prcm_base->clksel_core, 8, 4, CORE_SSI_DIV); /* FSUSB */ sr32(&prcm_base->clksel_core, 4, 2, CORE_FUSB_DIV); /* L4 */ sr32(&prcm_base->clksel_core, 2, 2, CORE_L4_DIV); /* L3 */ sr32(&prcm_base->clksel_core, 0, 2, CORE_L3_DIV); /* GFX */ sr32(&prcm_base->clksel_gfx, 0, 3, GFX_DIV_36X); /* RESET MGR */ sr32(&prcm_base->clksel_wkup, 1, 2, WKUP_RSM); /* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */ sr32(&prcm_base->clken_pll, 4, 4, ptr->fsel); /* LOCK MODE */ sr32(&prcm_base->clken_pll, 0, 3, PLL_LOCK); wait_on_value(ST_CORE_CLK, 1, &prcm_base->idlest_ckgen, LDELAY); } else if (is_running_in_flash()) { /* * if running from flash, jump to small relocated code * area in SRAM. */ f_lock_pll = (void *) (SRAM_CLK_CODE); p0 = readl(&prcm_base->clken_pll); sr32(&p0, 0, 3, PLL_FAST_RELOCK_BYPASS); /* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */ sr32(&p0, 4, 4, ptr->fsel); p1 = readl(&prcm_base->clksel1_pll); /* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */ sr32(&p1, 27, 5, ptr->m2); /* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */ sr32(&p1, 16, 11, ptr->m); /* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */ sr32(&p1, 8, 7, ptr->n); /* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */ sr32(&p1, 6, 1, 0); p2 = readl(&prcm_base->clksel_core); /* SSI */ sr32(&p2, 8, 4, CORE_SSI_DIV); /* FSUSB */ sr32(&p2, 4, 2, CORE_FUSB_DIV); /* L4 */ sr32(&p2, 2, 2, CORE_L4_DIV); /* L3 */ sr32(&p2, 0, 2, CORE_L3_DIV); p3 = (u32)&prcm_base->idlest_ckgen; (*f_lock_pll) (p0, p1, p2, p3); } } static void dpll4_init_36xx(u32 sil_index, u32 clk_index) { struct prcm *prcm_base = (struct prcm *)PRCM_BASE; struct dpll_per_36x_param *ptr; ptr = (struct dpll_per_36x_param *)get_36x_per_dpll_param(); /* Moving it to the right sysclk base */ ptr += clk_index; /* EN_PERIPH_DPLL: CM_CLKEN_PLL[16:18] */ sr32(&prcm_base->clken_pll, 16, 3, PLL_STOP); wait_on_value(ST_PERIPH_CLK, 0, &prcm_base->idlest_ckgen, LDELAY); /* M6 (DIV_DPLL4): CM_CLKSEL1_EMU[24:29] */ sr32(&prcm_base->clksel1_emu, 24, 6, ptr->m6); /* M5 (CLKSEL_CAM): CM_CLKSEL1_EMU[0:5] */ sr32(&prcm_base->clksel_cam, 0, 6, ptr->m5); /* M4 (CLKSEL_DSS1): CM_CLKSEL_DSS[0:5] */ sr32(&prcm_base->clksel_dss, 0, 6, ptr->m4); /* M3 (CLKSEL_DSS1): CM_CLKSEL_DSS[8:13] */ sr32(&prcm_base->clksel_dss, 8, 6, ptr->m3); /* M2 (DIV_96M): CM_CLKSEL3_PLL[0:4] */ sr32(&prcm_base->clksel3_pll, 0, 5, ptr->m2); /* M (PERIPH_DPLL_MULT): CM_CLKSEL2_PLL[8:19] */ sr32(&prcm_base->clksel2_pll, 8, 12, ptr->m); /* N (PERIPH_DPLL_DIV): CM_CLKSEL2_PLL[0:6] */ sr32(&prcm_base->clksel2_pll, 0, 7, ptr->n); /* M2DIV (CLKSEL_96M): CM_CLKSEL_CORE[12:13] */ sr32(&prcm_base->clksel_core, 12, 2, ptr->m2div); /* LOCK MODE (EN_PERIPH_DPLL): CM_CLKEN_PLL[16:18] */ sr32(&prcm_base->clken_pll, 16, 3, PLL_LOCK); wait_on_value(ST_PERIPH_CLK, 2, &prcm_base->idlest_ckgen, LDELAY); } static void dpll5_init_36xx(u32 sil_index, u32 clk_index) { struct prcm *prcm_base = (struct prcm *)PRCM_BASE; dpll_param *ptr = (dpll_param *) get_36x_per2_dpll_param(); /* Moving it to the right sysclk base */ ptr = ptr + clk_index; /* PER2 DPLL (DPLL5) */ sr32(&prcm_base->clken2_pll, 0, 3, PLL_STOP); wait_on_value(1, 0, &prcm_base->idlest2_ckgen, LDELAY); sr32(&prcm_base->clksel5_pll, 0, 5, ptr->m2); /* set M2 (usbtll_fck) */ sr32(&prcm_base->clksel4_pll, 8, 11, ptr->m); /* set m (11-bit multiplier) */ sr32(&prcm_base->clksel4_pll, 0, 7, ptr->n); /* set n (7-bit divider)*/ sr32(&prcm_base->clken2_pll, 0, 3, PLL_LOCK); /* lock mode */ wait_on_value(1, 1, &prcm_base->idlest2_ckgen, LDELAY); } static void mpu_init_36xx(u32 sil_index, u32 clk_index) { struct prcm *prcm_base = (struct prcm *)PRCM_BASE; dpll_param *ptr = (dpll_param *) get_36x_mpu_dpll_param(); /* Moving to the right sysclk */ ptr += clk_index; /* MPU DPLL (unlocked already */ /* M2 (MPU_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_MPU[0:4] */ sr32(&prcm_base->clksel2_pll_mpu, 0, 5, ptr->m2); /* M (MPU_DPLL_MULT) : CM_CLKSEL2_PLL_MPU[8:18] */ sr32(&prcm_base->clksel1_pll_mpu, 8, 11, ptr->m); /* N (MPU_DPLL_DIV) : CM_CLKSEL2_PLL_MPU[0:6] */ sr32(&prcm_base->clksel1_pll_mpu, 0, 7, ptr->n); } static void iva_init_36xx(u32 sil_index, u32 clk_index) { struct prcm *prcm_base = (struct prcm *)PRCM_BASE; dpll_param *ptr = (dpll_param *)get_36x_iva_dpll_param(); /* Moving to the right sysclk */ ptr += clk_index; /* IVA DPLL */ /* EN_IVA2_DPLL : CM_CLKEN_PLL_IVA2[0:2] */ sr32(&prcm_base->clken_pll_iva2, 0, 3, PLL_STOP); wait_on_value(ST_IVA2_CLK, 0, &prcm_base->idlest_pll_iva2, LDELAY); /* M2 (IVA2_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_IVA2[0:4] */ sr32(&prcm_base->clksel2_pll_iva2, 0, 5, ptr->m2); /* M (IVA2_DPLL_MULT) : CM_CLKSEL1_PLL_IVA2[8:18] */ sr32(&prcm_base->clksel1_pll_iva2, 8, 11, ptr->m); /* N (IVA2_DPLL_DIV) : CM_CLKSEL1_PLL_IVA2[0:6] */ sr32(&prcm_base->clksel1_pll_iva2, 0, 7, ptr->n); /* LOCK (MODE (EN_IVA2_DPLL) : CM_CLKEN_PLL_IVA2[0:2] */ sr32(&prcm_base->clken_pll_iva2, 0, 3, PLL_LOCK); wait_on_value(ST_IVA2_CLK, 1, &prcm_base->idlest_pll_iva2, LDELAY); } /****************************************************************************** * prcm_init() - inits clocks for PRCM as defined in clocks.h * called from SRAM, or Flash (using temp SRAM stack). *****************************************************************************/ void prcm_init(void) { u32 osc_clk = 0, sys_clkin_sel; u32 clk_index, sil_index = 0; struct prm *prm_base = (struct prm *)PRM_BASE; struct prcm *prcm_base = (struct prcm *)PRCM_BASE; /* * Gauge the input clock speed and find out the sys_clkin_sel * value corresponding to the input clock. */ osc_clk = get_osc_clk_speed(); get_sys_clkin_sel(osc_clk, &sys_clkin_sel); /* set input crystal speed */ sr32(&prm_base->clksel, 0, 3, sys_clkin_sel); /* If the input clock is greater than 19.2M always divide/2 */ if (sys_clkin_sel > 2) { /* input clock divider */ sr32(&prm_base->clksrc_ctrl, 6, 2, 2); clk_index = sys_clkin_sel / 2; } else { /* input clock divider */ sr32(&prm_base->clksrc_ctrl, 6, 2, 1); clk_index = sys_clkin_sel; } if (get_cpu_family() == CPU_OMAP36XX) { /* * In warm reset conditions on OMAP36xx/AM/DM37xx * the rom code incorrectly sets the DPLL4 clock * input divider to /6.5. Section 3.5.3.3.3.2.1 of * the AM/DM37x TRM explains that the /6.5 divider * is used only when the input clock is 13MHz. * * If the part is in this cpu family *and* the input * clock *is not* 13 MHz, then reset the DPLL4 clock * input divider to /1 as it should never set to /6.5 * in this case. */ if (sys_clkin_sel != 1) /* 13 MHz */ /* Bit 8: DPLL4_CLKINP_DIV */ sr32(&prm_base->clksrc_ctrl, 8, 1, 0); /* Unlock MPU DPLL (slows things down, and needed later) */ sr32(&prcm_base->clken_pll_mpu, 0, 3, PLL_LOW_POWER_BYPASS); wait_on_value(ST_MPU_CLK, 0, &prcm_base->idlest_pll_mpu, LDELAY); dpll3_init_36xx(0, clk_index); dpll4_init_36xx(0, clk_index); dpll5_init_36xx(0, clk_index); iva_init_36xx(0, clk_index); mpu_init_36xx(0, clk_index); /* Lock MPU DPLL to set frequency */ sr32(&prcm_base->clken_pll_mpu, 0, 3, PLL_LOCK); wait_on_value(ST_MPU_CLK, 1, &prcm_base->idlest_pll_mpu, LDELAY); } else { /* * The DPLL tables are defined according to sysclk value and * silicon revision. The clk_index value will be used to get * the values for that input sysclk from the DPLL param table * and sil_index will get the values for that SysClk for the * appropriate silicon rev. */ if (((get_cpu_family() == CPU_OMAP34XX) && (get_cpu_rev() >= CPU_3XX_ES20)) || (get_cpu_family() == CPU_AM35XX)) sil_index = 1; /* Unlock MPU DPLL (slows things down, and needed later) */ sr32(&prcm_base->clken_pll_mpu, 0, 3, PLL_LOW_POWER_BYPASS); wait_on_value(ST_MPU_CLK, 0, &prcm_base->idlest_pll_mpu, LDELAY); dpll3_init_34xx(sil_index, clk_index); dpll4_init_34xx(sil_index, clk_index); dpll5_init_34xx(sil_index, clk_index); if (get_cpu_family() != CPU_AM35XX) iva_init_34xx(sil_index, clk_index); mpu_init_34xx(sil_index, clk_index); /* Lock MPU DPLL to set frequency */ sr32(&prcm_base->clken_pll_mpu, 0, 3, PLL_LOCK); wait_on_value(ST_MPU_CLK, 1, &prcm_base->idlest_pll_mpu, LDELAY); } /* Set up GPTimers to sys_clk source only */ sr32(&prcm_base->clksel_per, 0, 8, 0xff); sr32(&prcm_base->clksel_wkup, 0, 1, 1); sdelay(5000); } /* * Enable usb ehci uhh, tll clocks */ void ehci_clocks_enable(void) { struct prcm *prcm_base = (struct prcm *)PRCM_BASE; /* Enable USBHOST_L3_ICLK (USBHOST_MICLK) */ sr32(&prcm_base->iclken_usbhost, 0, 1, 1); /* * Enable USBHOST_48M_FCLK (USBHOST_FCLK1) * and USBHOST_120M_FCLK (USBHOST_FCLK2) */ sr32(&prcm_base->fclken_usbhost, 0, 2, 3); /* Enable USBTTL_ICLK */ sr32(&prcm_base->iclken3_core, 2, 1, 1); /* Enable USBTTL_FCLK */ sr32(&prcm_base->fclken3_core, 2, 1, 1); } /****************************************************************************** * peripheral_enable() - Enable the clks & power for perifs (GPT2, UART1,...) *****************************************************************************/ void per_clocks_enable(void) { struct prcm *prcm_base = (struct prcm *)PRCM_BASE; /* Enable GP2 timer. */ sr32(&prcm_base->clksel_per, 0, 1, 0x1); /* GPT2 = sys clk */ sr32(&prcm_base->iclken_per, 3, 1, 0x1); /* ICKen GPT2 */ sr32(&prcm_base->fclken_per, 3, 1, 0x1); /* FCKen GPT2 */ #ifdef CONFIG_SYS_NS16550 /* Enable UART1 clocks */ sr32(&prcm_base->fclken1_core, 13, 1, 0x1); sr32(&prcm_base->iclken1_core, 13, 1, 0x1); /* UART 3 Clocks */ sr32(&prcm_base->fclken_per, 11, 1, 0x1); sr32(&prcm_base->iclken_per, 11, 1, 0x1); #endif #ifdef CONFIG_OMAP3_GPIO_2 sr32(&prcm_base->fclken_per, 13, 1, 1); sr32(&prcm_base->iclken_per, 13, 1, 1); #endif #ifdef CONFIG_OMAP3_GPIO_3 sr32(&prcm_base->fclken_per, 14, 1, 1); sr32(&prcm_base->iclken_per, 14, 1, 1); #endif #ifdef CONFIG_OMAP3_GPIO_4 sr32(&prcm_base->fclken_per, 15, 1, 1); sr32(&prcm_base->iclken_per, 15, 1, 1); #endif #ifdef CONFIG_OMAP3_GPIO_5 sr32(&prcm_base->fclken_per, 16, 1, 1); sr32(&prcm_base->iclken_per, 16, 1, 1); #endif #ifdef CONFIG_OMAP3_GPIO_6 sr32(&prcm_base->fclken_per, 17, 1, 1); sr32(&prcm_base->iclken_per, 17, 1, 1); #endif #ifdef CONFIG_DRIVER_OMAP34XX_I2C /* Turn on all 3 I2C clocks */ sr32(&prcm_base->fclken1_core, 15, 3, 0x7); sr32(&prcm_base->iclken1_core, 15, 3, 0x7); /* I2C1,2,3 = on */ #endif /* Enable the ICLK for 32K Sync Timer as its used in udelay */ sr32(&prcm_base->iclken_wkup, 2, 1, 0x1); if (get_cpu_family() != CPU_AM35XX) sr32(&prcm_base->fclken_iva2, 0, 32, FCK_IVA2_ON); sr32(&prcm_base->fclken1_core, 0, 32, FCK_CORE1_ON); sr32(&prcm_base->iclken1_core, 0, 32, ICK_CORE1_ON); sr32(&prcm_base->iclken2_core, 0, 32, ICK_CORE2_ON); sr32(&prcm_base->fclken_wkup, 0, 32, FCK_WKUP_ON); sr32(&prcm_base->iclken_wkup, 0, 32, ICK_WKUP_ON); sr32(&prcm_base->fclken_dss, 0, 32, FCK_DSS_ON); sr32(&prcm_base->iclken_dss, 0, 32, ICK_DSS_ON); if (get_cpu_family() != CPU_AM35XX) { sr32(&prcm_base->fclken_cam, 0, 32, FCK_CAM_ON); sr32(&prcm_base->iclken_cam, 0, 32, ICK_CAM_ON); } sr32(&prcm_base->fclken_per, 0, 32, FCK_PER_ON); sr32(&prcm_base->iclken_per, 0, 32, ICK_PER_ON); sdelay(1000); }