diff options
Diffstat (limited to 'cpu/arm_cortexa8/omap3/clock.c')
-rw-r--r-- | cpu/arm_cortexa8/omap3/clock.c | 416 |
1 files changed, 0 insertions, 416 deletions
diff --git a/cpu/arm_cortexa8/omap3/clock.c b/cpu/arm_cortexa8/omap3/clock.c deleted file mode 100644 index 6330c9e5da..0000000000 --- a/cpu/arm_cortexa8/omap3/clock.c +++ /dev/null @@ -1,416 +0,0 @@ -/* - * (C) Copyright 2008 - * Texas Instruments, <www.ti.com> - * - * Author : - * Manikandan Pillai <mani.pillai@ti.com> - * - * Derived from Beagle Board and OMAP3 SDP code by - * Richard Woodruff <r-woodruff2@ti.com> - * Syed Mohammed Khasim <khasim@ti.com> - * - * 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 <common.h> -#include <asm/io.h> -#include <asm/arch/clocks.h> -#include <asm/arch/clocks_omap3.h> -#include <asm/arch/mem.h> -#include <asm/arch/sys_proto.h> -#include <environment.h> -#include <command.h> - -/****************************************************************************** - * 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 if (val & SYSCLKDIV_1) - cdiv = 1; - else - /* - * Should never reach here! (Assume divider as 1) - */ - 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 */ - - if (cdiv == 2) - { - cdiff *= 2; - } - - /* 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; - } -} - -/****************************************************************************** - * prcm_init() - inits clocks for PRCM as defined in clocks.h - * called from SRAM, or Flash (using temp SRAM stack). - *****************************************************************************/ -void prcm_init(void) -{ - void (*f_lock_pll) (u32, u32, u32, u32); - int xip_safe, p0, p1, p2, p3; - 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; - dpll_param *dpll_param_p; - - f_lock_pll = (void *) ((u32) &_end_vect - (u32) &_start + - SRAM_VECT_CODE); - - xip_safe = is_running_in_sram(); - - /* - * 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; - } - - /* - * 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_rev()) - 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); - - /* Getting the base address of Core DPLL param table */ - dpll_param_p = (dpll_param *) get_core_dpll_param(); - - /* Moving it to the right sysclk and ES rev base */ - dpll_param_p = dpll_param_p + 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. - */ - - /* m3x2 */ - sr32(&prcm_base->clksel1_emu, 16, 5, CORE_M3X2 + 1); - /* m3x2 */ - sr32(&prcm_base->clksel1_emu, 16, 5, CORE_M3X2); - /* Set M2 */ - sr32(&prcm_base->clksel1_pll, 27, 2, dpll_param_p->m2); - /* Set M */ - sr32(&prcm_base->clksel1_pll, 16, 11, dpll_param_p->m); - /* Set N */ - sr32(&prcm_base->clksel1_pll, 8, 7, dpll_param_p->n); - /* 96M Src */ - 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 */ - sr32(&prcm_base->clken_pll, 4, 4, dpll_param_p->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. - */ - p0 = readl(&prcm_base->clken_pll); - sr32(&p0, 0, 3, PLL_FAST_RELOCK_BYPASS); - sr32(&p0, 4, 4, dpll_param_p->fsel); /* FREQSEL */ - - p1 = readl(&prcm_base->clksel1_pll); - sr32(&p1, 27, 2, dpll_param_p->m2); /* Set M2 */ - sr32(&p1, 16, 11, dpll_param_p->m); /* Set M */ - sr32(&p1, 8, 7, dpll_param_p->n); /* Set N */ - sr32(&p1, 6, 1, 0); /* set source for 96M */ - - p2 = readl(&prcm_base->clksel_core); - sr32(&p2, 8, 4, CORE_SSI_DIV); /* ssi */ - sr32(&p2, 4, 2, CORE_FUSB_DIV); /* fsusb */ - sr32(&p2, 2, 2, CORE_L4_DIV); /* l4 */ - sr32(&p2, 0, 2, CORE_L3_DIV); /* l3 */ - - p3 = (u32)&prcm_base->idlest_ckgen; - - (*f_lock_pll) (p0, p1, p2, p3); - } - - /* PER DPLL */ - sr32(&prcm_base->clken_pll, 16, 3, PLL_STOP); - wait_on_value(ST_PERIPH_CLK, 0, &prcm_base->idlest_ckgen, LDELAY); - - /* Getting the base address to PER DPLL param table */ - - /* Set N */ - dpll_param_p = (dpll_param *) get_per_dpll_param(); - - /* Moving it to the right sysclk base */ - dpll_param_p = dpll_param_p + clk_index; - - /* - * Errata 1.50 Workaround for OMAP3 ES1.0 only - * If using default divisors, write default divisor + 1 - * and then the actual divisor value - */ - sr32(&prcm_base->clksel1_emu, 24, 5, PER_M6X2 + 1); /* set M6 */ - sr32(&prcm_base->clksel1_emu, 24, 5, PER_M6X2); /* set M6 */ - sr32(&prcm_base->clksel_cam, 0, 5, PER_M5X2 + 1); /* set M5 */ - sr32(&prcm_base->clksel_cam, 0, 5, PER_M5X2); /* set M5 */ - sr32(&prcm_base->clksel_dss, 0, 5, PER_M4X2 + 1); /* set M4 */ - sr32(&prcm_base->clksel_dss, 0, 5, PER_M4X2); /* set M4 */ - sr32(&prcm_base->clksel_dss, 8, 5, PER_M3X2 + 1); /* set M3 */ - sr32(&prcm_base->clksel_dss, 8, 5, PER_M3X2); /* set M3 */ - sr32(&prcm_base->clksel3_pll, 0, 5, dpll_param_p->m2 + 1); /* set M2 */ - sr32(&prcm_base->clksel3_pll, 0, 5, dpll_param_p->m2); /* set M2 */ - /* Workaround end */ - - sr32(&prcm_base->clksel2_pll, 8, 11, dpll_param_p->m); /* set m */ - sr32(&prcm_base->clksel2_pll, 0, 7, dpll_param_p->n); /* set n */ - sr32(&prcm_base->clken_pll, 20, 4, dpll_param_p->fsel); /* FREQSEL */ - sr32(&prcm_base->clken_pll, 16, 3, PLL_LOCK); /* lock mode */ - wait_on_value(ST_PERIPH_CLK, 2, &prcm_base->idlest_ckgen, LDELAY); - - /* Getting the base address to MPU DPLL param table */ - dpll_param_p = (dpll_param *) get_mpu_dpll_param(); - - /* Moving it to the right sysclk and ES rev base */ - dpll_param_p = dpll_param_p + 3 * clk_index + sil_index; - - /* MPU DPLL (unlocked already) */ - - /* Set M2 */ - sr32(&prcm_base->clksel2_pll_mpu, 0, 5, dpll_param_p->m2); - /* Set M */ - sr32(&prcm_base->clksel1_pll_mpu, 8, 11, dpll_param_p->m); - /* Set N */ - sr32(&prcm_base->clksel1_pll_mpu, 0, 7, dpll_param_p->n); - /* FREQSEL */ - sr32(&prcm_base->clken_pll_mpu, 4, 4, dpll_param_p->fsel); - /* lock mode */ - sr32(&prcm_base->clken_pll_mpu, 0, 3, PLL_LOCK); - wait_on_value(ST_MPU_CLK, 1, &prcm_base->idlest_pll_mpu, LDELAY); - - /* Getting the base address to IVA DPLL param table */ - dpll_param_p = (dpll_param *) get_iva_dpll_param(); - - /* Moving it to the right sysclk and ES rev base */ - dpll_param_p = dpll_param_p + 3 * clk_index + sil_index; - - /* IVA DPLL (set to 12*20=240MHz) */ - sr32(&prcm_base->clken_pll_iva2, 0, 3, PLL_STOP); - wait_on_value(ST_IVA2_CLK, 0, &prcm_base->idlest_pll_iva2, LDELAY); - /* set M2 */ - sr32(&prcm_base->clksel2_pll_iva2, 0, 5, dpll_param_p->m2); - /* set M */ - sr32(&prcm_base->clksel1_pll_iva2, 8, 11, dpll_param_p->m); - /* set N */ - sr32(&prcm_base->clksel1_pll_iva2, 0, 7, dpll_param_p->n); - /* FREQSEL */ - sr32(&prcm_base->clken_pll_iva2, 4, 4, dpll_param_p->fsel); - /* lock mode */ - sr32(&prcm_base->clken_pll_iva2, 0, 3, PLL_LOCK); - wait_on_value(ST_IVA2_CLK, 1, &prcm_base->idlest_pll_iva2, 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); -} - -/****************************************************************************** - * 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); - - 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); - 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); -} |