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Diffstat (limited to 'arch/arm/cpu/armv7/omap-common/clocks-common.c')
-rw-r--r--arch/arm/cpu/armv7/omap-common/clocks-common.c941
1 files changed, 941 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/clocks-common.c b/arch/arm/cpu/armv7/omap-common/clocks-common.c
new file mode 100644
index 0000000..095ba39
--- /dev/null
+++ b/arch/arm/cpu/armv7/omap-common/clocks-common.c
@@ -0,0 +1,941 @@
+/*
+ *
+ * Clock initialization for OMAP4
+ *
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * Aneesh V <aneesh@ti.com>
+ *
+ * Based on previous work by:
+ * Santosh Shilimkar <santosh.shilimkar@ti.com>
+ * Rajendra Nayak <rnayak@ti.com>
+ *
+ * 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 <common.h>
+#include <asm/omap_common.h>
+#include <asm/gpio.h>
+#include <asm/arch/clocks.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/utils.h>
+#include <asm/omap_gpio.h>
+
+#ifndef CONFIG_SPL_BUILD
+/*
+ * printing to console doesn't work unless
+ * this code is executed from SPL
+ */
+#define printf(fmt, args...)
+#define puts(s)
+#endif
+
+#define abs(x) (((x) < 0) ? ((x)*-1) : (x))
+
+struct omap4_prcm_regs *const prcm = (struct omap4_prcm_regs *)0x4A004100;
+
+static const u32 sys_clk_array[8] = {
+ 12000000, /* 12 MHz */
+ 13000000, /* 13 MHz */
+ 16800000, /* 16.8 MHz */
+ 19200000, /* 19.2 MHz */
+ 26000000, /* 26 MHz */
+ 27000000, /* 27 MHz */
+ 38400000, /* 38.4 MHz */
+};
+
+/*
+ * The M & N values in the following tables are created using the
+ * following tool:
+ * tools/omap/clocks_get_m_n.c
+ * Please use this tool for creating the table for any new frequency.
+ */
+
+/* dpll locked at 1840 MHz MPU clk at 920 MHz(OPP Turbo 4460) - DCC OFF */
+static const struct dpll_params mpu_dpll_params_1840mhz[NUM_SYS_CLKS] = {
+ {230, 2, 1, -1, -1, -1, -1, -1}, /* 12 MHz */
+ {920, 12, 1, -1, -1, -1, -1, -1}, /* 13 MHz */
+ {219, 3, 1, -1, -1, -1, -1, -1}, /* 16.8 MHz */
+ {575, 11, 1, -1, -1, -1, -1, -1}, /* 19.2 MHz */
+ {460, 12, 1, -1, -1, -1, -1, -1}, /* 26 MHz */
+ {920, 26, 1, -1, -1, -1, -1, -1}, /* 27 MHz */
+ {575, 23, 1, -1, -1, -1, -1, -1} /* 38.4 MHz */
+};
+
+/* dpll locked at 1584 MHz - MPU clk at 792 MHz(OPP Turbo 4430) */
+static const struct dpll_params mpu_dpll_params_1584mhz[NUM_SYS_CLKS] = {
+ {66, 0, 1, -1, -1, -1, -1, -1}, /* 12 MHz */
+ {792, 12, 1, -1, -1, -1, -1, -1}, /* 13 MHz */
+ {330, 6, 1, -1, -1, -1, -1, -1}, /* 16.8 MHz */
+ {165, 3, 1, -1, -1, -1, -1, -1}, /* 19.2 MHz */
+ {396, 12, 1, -1, -1, -1, -1, -1}, /* 26 MHz */
+ {88, 2, 1, -1, -1, -1, -1, -1}, /* 27 MHz */
+ {165, 7, 1, -1, -1, -1, -1, -1} /* 38.4 MHz */
+};
+
+/* dpll locked at 1200 MHz - MPU clk at 600 MHz */
+static const struct dpll_params mpu_dpll_params_1200mhz[NUM_SYS_CLKS] = {
+ {50, 0, 1, -1, -1, -1, -1, -1}, /* 12 MHz */
+ {600, 12, 1, -1, -1, -1, -1, -1}, /* 13 MHz */
+ {250, 6, 1, -1, -1, -1, -1, -1}, /* 16.8 MHz */
+ {125, 3, 1, -1, -1, -1, -1, -1}, /* 19.2 MHz */
+ {300, 12, 1, -1, -1, -1, -1, -1}, /* 26 MHz */
+ {200, 8, 1, -1, -1, -1, -1, -1}, /* 27 MHz */
+ {125, 7, 1, -1, -1, -1, -1, -1} /* 38.4 MHz */
+};
+
+static const struct dpll_params core_dpll_params_1600mhz[NUM_SYS_CLKS] = {
+ {200, 2, 1, 5, 8, 4, 6, 5}, /* 12 MHz */
+ {800, 12, 1, 5, 8, 4, 6, 5}, /* 13 MHz */
+ {619, 12, 1, 5, 8, 4, 6, 5}, /* 16.8 MHz */
+ {125, 2, 1, 5, 8, 4, 6, 5}, /* 19.2 MHz */
+ {400, 12, 1, 5, 8, 4, 6, 5}, /* 26 MHz */
+ {800, 26, 1, 5, 8, 4, 6, 5}, /* 27 MHz */
+ {125, 5, 1, 5, 8, 4, 6, 5} /* 38.4 MHz */
+};
+
+static const struct dpll_params core_dpll_params_es1_1524mhz[NUM_SYS_CLKS] = {
+ {127, 1, 1, 5, 8, 4, 6, 5}, /* 12 MHz */
+ {762, 12, 1, 5, 8, 4, 6, 5}, /* 13 MHz */
+ {635, 13, 1, 5, 8, 4, 6, 5}, /* 16.8 MHz */
+ {635, 15, 1, 5, 8, 4, 6, 5}, /* 19.2 MHz */
+ {381, 12, 1, 5, 8, 4, 6, 5}, /* 26 MHz */
+ {254, 8, 1, 5, 8, 4, 6, 5}, /* 27 MHz */
+ {496, 24, 1, 5, 8, 4, 6, 5} /* 38.4 MHz */
+};
+
+static const struct dpll_params
+ core_dpll_params_es2_1600mhz_ddr200mhz[NUM_SYS_CLKS] = {
+ {200, 2, 2, 5, 8, 4, 6, 5}, /* 12 MHz */
+ {800, 12, 2, 5, 8, 4, 6, 5}, /* 13 MHz */
+ {619, 12, 2, 5, 8, 4, 6, 5}, /* 16.8 MHz */
+ {125, 2, 2, 5, 8, 4, 6, 5}, /* 19.2 MHz */
+ {400, 12, 2, 5, 8, 4, 6, 5}, /* 26 MHz */
+ {800, 26, 2, 5, 8, 4, 6, 5}, /* 27 MHz */
+ {125, 5, 2, 5, 8, 4, 6, 5} /* 38.4 MHz */
+};
+
+static const struct dpll_params per_dpll_params_1536mhz[NUM_SYS_CLKS] = {
+ {64, 0, 8, 6, 12, 9, 4, 5}, /* 12 MHz */
+ {768, 12, 8, 6, 12, 9, 4, 5}, /* 13 MHz */
+ {320, 6, 8, 6, 12, 9, 4, 5}, /* 16.8 MHz */
+ {40, 0, 8, 6, 12, 9, 4, 5}, /* 19.2 MHz */
+ {384, 12, 8, 6, 12, 9, 4, 5}, /* 26 MHz */
+ {256, 8, 8, 6, 12, 9, 4, 5}, /* 27 MHz */
+ {20, 0, 8, 6, 12, 9, 4, 5} /* 38.4 MHz */
+};
+
+static const struct dpll_params iva_dpll_params_1862mhz[NUM_SYS_CLKS] = {
+ {931, 11, -1, -1, 4, 7, -1, -1}, /* 12 MHz */
+ {931, 12, -1, -1, 4, 7, -1, -1}, /* 13 MHz */
+ {665, 11, -1, -1, 4, 7, -1, -1}, /* 16.8 MHz */
+ {727, 14, -1, -1, 4, 7, -1, -1}, /* 19.2 MHz */
+ {931, 25, -1, -1, 4, 7, -1, -1}, /* 26 MHz */
+ {931, 26, -1, -1, 4, 7, -1, -1}, /* 27 MHz */
+ {412, 16, -1, -1, 4, 7, -1, -1} /* 38.4 MHz */
+};
+
+/* ABE M & N values with sys_clk as source */
+static const struct dpll_params
+ abe_dpll_params_sysclk_196608khz[NUM_SYS_CLKS] = {
+ {49, 5, 1, 1, -1, -1, -1, -1}, /* 12 MHz */
+ {68, 8, 1, 1, -1, -1, -1, -1}, /* 13 MHz */
+ {35, 5, 1, 1, -1, -1, -1, -1}, /* 16.8 MHz */
+ {46, 8, 1, 1, -1, -1, -1, -1}, /* 19.2 MHz */
+ {34, 8, 1, 1, -1, -1, -1, -1}, /* 26 MHz */
+ {29, 7, 1, 1, -1, -1, -1, -1}, /* 27 MHz */
+ {64, 24, 1, 1, -1, -1, -1, -1} /* 38.4 MHz */
+};
+
+/* ABE M & N values with 32K clock as source */
+static const struct dpll_params abe_dpll_params_32k_196608khz = {
+ 750, 0, 1, 1, -1, -1, -1, -1
+};
+
+
+static const struct dpll_params usb_dpll_params_1920mhz[NUM_SYS_CLKS] = {
+ {80, 0, 2, -1, -1, -1, -1, -1}, /* 12 MHz */
+ {960, 12, 2, -1, -1, -1, -1, -1}, /* 13 MHz */
+ {400, 6, 2, -1, -1, -1, -1, -1}, /* 16.8 MHz */
+ {50, 0, 2, -1, -1, -1, -1, -1}, /* 19.2 MHz */
+ {480, 12, 2, -1, -1, -1, -1, -1}, /* 26 MHz */
+ {320, 8, 2, -1, -1, -1, -1, -1}, /* 27 MHz */
+ {25, 0, 2, -1, -1, -1, -1, -1} /* 38.4 MHz */
+};
+
+static inline u32 __get_sys_clk_index(void)
+{
+ u32 ind;
+ /*
+ * For ES1 the ROM code calibration of sys clock is not reliable
+ * due to hw issue. So, use hard-coded value. If this value is not
+ * correct for any board over-ride this function in board file
+ * From ES2.0 onwards you will get this information from
+ * CM_SYS_CLKSEL
+ */
+ if (omap_revision() == OMAP4430_ES1_0)
+ ind = OMAP_SYS_CLK_IND_38_4_MHZ;
+ else {
+ /* SYS_CLKSEL - 1 to match the dpll param array indices */
+ ind = (readl(&prcm->cm_sys_clksel) &
+ CM_SYS_CLKSEL_SYS_CLKSEL_MASK) - 1;
+ }
+ return ind;
+}
+
+u32 get_sys_clk_index(void)
+ __attribute__ ((weak, alias("__get_sys_clk_index")));
+
+u32 get_sys_clk_freq(void)
+{
+ u8 index = get_sys_clk_index();
+ return sys_clk_array[index];
+}
+
+static inline void do_bypass_dpll(u32 *const base)
+{
+ struct dpll_regs *dpll_regs = (struct dpll_regs *)base;
+
+ clrsetbits_le32(&dpll_regs->cm_clkmode_dpll,
+ CM_CLKMODE_DPLL_DPLL_EN_MASK,
+ DPLL_EN_FAST_RELOCK_BYPASS <<
+ CM_CLKMODE_DPLL_EN_SHIFT);
+}
+
+static inline void wait_for_bypass(u32 *const base)
+{
+ struct dpll_regs *const dpll_regs = (struct dpll_regs *)base;
+
+ if (!wait_on_value(ST_DPLL_CLK_MASK, 0, &dpll_regs->cm_idlest_dpll,
+ LDELAY)) {
+ printf("Bypassing DPLL failed %p\n", base);
+ }
+}
+
+static inline void do_lock_dpll(u32 *const base)
+{
+ struct dpll_regs *const dpll_regs = (struct dpll_regs *)base;
+
+ clrsetbits_le32(&dpll_regs->cm_clkmode_dpll,
+ CM_CLKMODE_DPLL_DPLL_EN_MASK,
+ DPLL_EN_LOCK << CM_CLKMODE_DPLL_EN_SHIFT);
+}
+
+static inline void wait_for_lock(u32 *const base)
+{
+ struct dpll_regs *const dpll_regs = (struct dpll_regs *)base;
+
+ if (!wait_on_value(ST_DPLL_CLK_MASK, ST_DPLL_CLK_MASK,
+ &dpll_regs->cm_idlest_dpll, LDELAY)) {
+ printf("DPLL locking failed for %p\n", base);
+ hang();
+ }
+}
+
+static void do_setup_dpll(u32 *const base, const struct dpll_params *params,
+ u8 lock)
+{
+ u32 temp;
+ struct dpll_regs *const dpll_regs = (struct dpll_regs *)base;
+
+ bypass_dpll(base);
+
+ /* Set M & N */
+ temp = readl(&dpll_regs->cm_clksel_dpll);
+
+ temp &= ~CM_CLKSEL_DPLL_M_MASK;
+ temp |= (params->m << CM_CLKSEL_DPLL_M_SHIFT) & CM_CLKSEL_DPLL_M_MASK;
+
+ temp &= ~CM_CLKSEL_DPLL_N_MASK;
+ temp |= (params->n << CM_CLKSEL_DPLL_N_SHIFT) & CM_CLKSEL_DPLL_N_MASK;
+
+ writel(temp, &dpll_regs->cm_clksel_dpll);
+
+ /* Lock */
+ if (lock)
+ do_lock_dpll(base);
+
+ /* Setup post-dividers */
+ if (params->m2 >= 0)
+ writel(params->m2, &dpll_regs->cm_div_m2_dpll);
+ if (params->m3 >= 0)
+ writel(params->m3, &dpll_regs->cm_div_m3_dpll);
+ if (params->m4 >= 0)
+ writel(params->m4, &dpll_regs->cm_div_m4_dpll);
+ if (params->m5 >= 0)
+ writel(params->m5, &dpll_regs->cm_div_m5_dpll);
+ if (params->m6 >= 0)
+ writel(params->m6, &dpll_regs->cm_div_m6_dpll);
+ if (params->m7 >= 0)
+ writel(params->m7, &dpll_regs->cm_div_m7_dpll);
+
+ /* Wait till the DPLL locks */
+ if (lock)
+ wait_for_lock(base);
+}
+
+const struct dpll_params *get_core_dpll_params(void)
+{
+ u32 sysclk_ind = get_sys_clk_index();
+
+ switch (omap_revision()) {
+ case OMAP4430_ES1_0:
+ return &core_dpll_params_es1_1524mhz[sysclk_ind];
+ case OMAP4430_ES2_0:
+ case OMAP4430_SILICON_ID_INVALID:
+ /* safest */
+ return &core_dpll_params_es2_1600mhz_ddr200mhz[sysclk_ind];
+ default:
+ return &core_dpll_params_1600mhz[sysclk_ind];
+ }
+}
+
+u32 omap4_ddr_clk(void)
+{
+ u32 ddr_clk, sys_clk_khz;
+ const struct dpll_params *core_dpll_params;
+
+ sys_clk_khz = get_sys_clk_freq() / 1000;
+
+ core_dpll_params = get_core_dpll_params();
+
+ debug("sys_clk %d\n ", sys_clk_khz * 1000);
+
+ /* Find Core DPLL locked frequency first */
+ ddr_clk = sys_clk_khz * 2 * core_dpll_params->m /
+ (core_dpll_params->n + 1);
+ /*
+ * DDR frequency is PHY_ROOT_CLK/2
+ * PHY_ROOT_CLK = Fdpll/2/M2
+ */
+ ddr_clk = ddr_clk / 4 / core_dpll_params->m2;
+
+ ddr_clk *= 1000; /* convert to Hz */
+ debug("ddr_clk %d\n ", ddr_clk);
+
+ return ddr_clk;
+}
+
+/*
+ * Lock MPU dpll
+ *
+ * Resulting MPU frequencies:
+ * 4430 ES1.0 : 600 MHz
+ * 4430 ES2.x : 792 MHz (OPP Turbo)
+ * 4460 : 920 MHz (OPP Turbo) - DCC disabled
+ */
+void configure_mpu_dpll(void)
+{
+ const struct dpll_params *params;
+ struct dpll_regs *mpu_dpll_regs;
+ u32 omap4_rev, sysclk_ind;
+
+ omap4_rev = omap_revision();
+ sysclk_ind = get_sys_clk_index();
+
+ if (omap4_rev == OMAP4430_ES1_0)
+ params = &mpu_dpll_params_1200mhz[sysclk_ind];
+ else if (omap4_rev < OMAP4460_ES1_0)
+ params = &mpu_dpll_params_1584mhz[sysclk_ind];
+ else
+ params = &mpu_dpll_params_1840mhz[sysclk_ind];
+
+ /* DCC and clock divider settings for 4460 */
+ if (omap4_rev >= OMAP4460_ES1_0) {
+ mpu_dpll_regs =
+ (struct dpll_regs *)&prcm->cm_clkmode_dpll_mpu;
+ bypass_dpll(&prcm->cm_clkmode_dpll_mpu);
+ clrbits_le32(&prcm->cm_mpu_mpu_clkctrl,
+ MPU_CLKCTRL_CLKSEL_EMIF_DIV_MODE_MASK);
+ setbits_le32(&prcm->cm_mpu_mpu_clkctrl,
+ MPU_CLKCTRL_CLKSEL_ABE_DIV_MODE_MASK);
+ clrbits_le32(&mpu_dpll_regs->cm_clksel_dpll,
+ CM_CLKSEL_DCC_EN_MASK);
+ }
+
+ do_setup_dpll(&prcm->cm_clkmode_dpll_mpu, params, DPLL_LOCK);
+ debug("MPU DPLL locked\n");
+}
+
+static void setup_dplls(void)
+{
+ u32 sysclk_ind, temp;
+ const struct dpll_params *params;
+ debug("setup_dplls\n");
+
+ sysclk_ind = get_sys_clk_index();
+
+ /* CORE dpll */
+ params = get_core_dpll_params(); /* default - safest */
+ /*
+ * Do not lock the core DPLL now. Just set it up.
+ * Core DPLL will be locked after setting up EMIF
+ * using the FREQ_UPDATE method(freq_update_core())
+ */
+ do_setup_dpll(&prcm->cm_clkmode_dpll_core, params, DPLL_NO_LOCK);
+ /* Set the ratios for CORE_CLK, L3_CLK, L4_CLK */
+ temp = (CLKSEL_CORE_X2_DIV_1 << CLKSEL_CORE_SHIFT) |
+ (CLKSEL_L3_CORE_DIV_2 << CLKSEL_L3_SHIFT) |
+ (CLKSEL_L4_L3_DIV_2 << CLKSEL_L4_SHIFT);
+ writel(temp, &prcm->cm_clksel_core);
+ debug("Core DPLL configured\n");
+
+ /* lock PER dpll */
+ do_setup_dpll(&prcm->cm_clkmode_dpll_per,
+ &per_dpll_params_1536mhz[sysclk_ind], DPLL_LOCK);
+ debug("PER DPLL locked\n");
+
+ /* MPU dpll */
+ configure_mpu_dpll();
+}
+
+static void setup_non_essential_dplls(void)
+{
+ u32 sys_clk_khz, abe_ref_clk;
+ u32 sysclk_ind, sd_div, num, den;
+ const struct dpll_params *params;
+
+ sysclk_ind = get_sys_clk_index();
+ sys_clk_khz = get_sys_clk_freq() / 1000;
+
+ /* IVA */
+ clrsetbits_le32(&prcm->cm_bypclk_dpll_iva,
+ CM_BYPCLK_DPLL_IVA_CLKSEL_MASK, DPLL_IVA_CLKSEL_CORE_X2_DIV_2);
+
+ do_setup_dpll(&prcm->cm_clkmode_dpll_iva,
+ &iva_dpll_params_1862mhz[sysclk_ind], DPLL_LOCK);
+
+ /*
+ * USB:
+ * USB dpll is J-type. Need to set DPLL_SD_DIV for jitter correction
+ * DPLL_SD_DIV = CEILING ([DPLL_MULT/(DPLL_DIV+1)]* CLKINP / 250)
+ * - where CLKINP is sys_clk in MHz
+ * Use CLKINP in KHz and adjust the denominator accordingly so
+ * that we have enough accuracy and at the same time no overflow
+ */
+ params = &usb_dpll_params_1920mhz[sysclk_ind];
+ num = params->m * sys_clk_khz;
+ den = (params->n + 1) * 250 * 1000;
+ num += den - 1;
+ sd_div = num / den;
+ clrsetbits_le32(&prcm->cm_clksel_dpll_usb,
+ CM_CLKSEL_DPLL_DPLL_SD_DIV_MASK,
+ sd_div << CM_CLKSEL_DPLL_DPLL_SD_DIV_SHIFT);
+
+ /* Now setup the dpll with the regular function */
+ do_setup_dpll(&prcm->cm_clkmode_dpll_usb, params, DPLL_LOCK);
+
+#ifdef CONFIG_SYS_OMAP4_ABE_SYSCK
+ params = &abe_dpll_params_sysclk_196608khz[sysclk_ind];
+ abe_ref_clk = CM_ABE_PLL_REF_CLKSEL_CLKSEL_SYSCLK;
+#else
+ params = &abe_dpll_params_32k_196608khz;
+ abe_ref_clk = CM_ABE_PLL_REF_CLKSEL_CLKSEL_32KCLK;
+ /*
+ * We need to enable some additional options to achieve
+ * 196.608MHz from 32768 Hz
+ */
+ setbits_le32(&prcm->cm_clkmode_dpll_abe,
+ CM_CLKMODE_DPLL_DRIFTGUARD_EN_MASK|
+ CM_CLKMODE_DPLL_RELOCK_RAMP_EN_MASK|
+ CM_CLKMODE_DPLL_LPMODE_EN_MASK|
+ CM_CLKMODE_DPLL_REGM4XEN_MASK);
+ /* Spend 4 REFCLK cycles at each stage */
+ clrsetbits_le32(&prcm->cm_clkmode_dpll_abe,
+ CM_CLKMODE_DPLL_RAMP_RATE_MASK,
+ 1 << CM_CLKMODE_DPLL_RAMP_RATE_SHIFT);
+#endif
+
+ /* Select the right reference clk */
+ clrsetbits_le32(&prcm->cm_abe_pll_ref_clksel,
+ CM_ABE_PLL_REF_CLKSEL_CLKSEL_MASK,
+ abe_ref_clk << CM_ABE_PLL_REF_CLKSEL_CLKSEL_SHIFT);
+ /* Lock the dpll */
+ do_setup_dpll(&prcm->cm_clkmode_dpll_abe, params, DPLL_LOCK);
+}
+
+static void do_scale_tps62361(u32 reg, u32 volt_mv)
+{
+ u32 temp, step;
+
+ step = volt_mv - TPS62361_BASE_VOLT_MV;
+ step /= 10;
+
+ /*
+ * Select SET1 in TPS62361:
+ * VSEL1 is grounded on board. So the following selects
+ * VSEL1 = 0 and VSEL0 = 1
+ */
+ gpio_direction_output(TPS62361_VSEL0_GPIO, 0);
+ gpio_set_value(TPS62361_VSEL0_GPIO, 1);
+
+ temp = TPS62361_I2C_SLAVE_ADDR |
+ (reg << PRM_VC_VAL_BYPASS_REGADDR_SHIFT) |
+ (step << PRM_VC_VAL_BYPASS_DATA_SHIFT) |
+ PRM_VC_VAL_BYPASS_VALID_BIT;
+ debug("do_scale_tps62361: volt - %d step - 0x%x\n", volt_mv, step);
+
+ writel(temp, &prcm->prm_vc_val_bypass);
+ if (!wait_on_value(PRM_VC_VAL_BYPASS_VALID_BIT, 0,
+ &prcm->prm_vc_val_bypass, LDELAY)) {
+ puts("Scaling voltage failed for vdd_mpu from TPS\n");
+ }
+}
+
+static void do_scale_vcore(u32 vcore_reg, u32 volt_mv)
+{
+ u32 temp, offset_code;
+ u32 step = 12660; /* 12.66 mV represented in uV */
+ u32 offset = volt_mv;
+
+ /* convert to uV for better accuracy in the calculations */
+ offset *= 1000;
+
+ if (omap_revision() == OMAP4430_ES1_0)
+ offset -= PHOENIX_SMPS_BASE_VOLT_STD_MODE_UV;
+ else
+ offset -= PHOENIX_SMPS_BASE_VOLT_STD_MODE_WITH_OFFSET_UV;
+
+ offset_code = (offset + step - 1) / step;
+ /* The code starts at 1 not 0 */
+ offset_code++;
+
+ debug("do_scale_vcore: volt - %d offset_code - 0x%x\n", volt_mv,
+ offset_code);
+
+ temp = SMPS_I2C_SLAVE_ADDR |
+ (vcore_reg << PRM_VC_VAL_BYPASS_REGADDR_SHIFT) |
+ (offset_code << PRM_VC_VAL_BYPASS_DATA_SHIFT) |
+ PRM_VC_VAL_BYPASS_VALID_BIT;
+ writel(temp, &prcm->prm_vc_val_bypass);
+ if (!wait_on_value(PRM_VC_VAL_BYPASS_VALID_BIT, 0,
+ &prcm->prm_vc_val_bypass, LDELAY)) {
+ printf("Scaling voltage failed for 0x%x\n", vcore_reg);
+ }
+}
+
+/*
+ * Setup the voltages for vdd_mpu, vdd_core, and vdd_iva
+ * We set the maximum voltages allowed here because Smart-Reflex is not
+ * enabled in bootloader. Voltage initialization in the kernel will set
+ * these to the nominal values after enabling Smart-Reflex
+ */
+static void scale_vcores(void)
+{
+ u32 volt, sys_clk_khz, cycles_hi, cycles_low, temp, omap4_rev;
+
+ sys_clk_khz = get_sys_clk_freq() / 1000;
+
+ /*
+ * Setup the dedicated I2C controller for Voltage Control
+ * I2C clk - high period 40% low period 60%
+ */
+ cycles_hi = sys_clk_khz * 4 / PRM_VC_I2C_CHANNEL_FREQ_KHZ / 10;
+ cycles_low = sys_clk_khz * 6 / PRM_VC_I2C_CHANNEL_FREQ_KHZ / 10;
+ /* values to be set in register - less by 5 & 7 respectively */
+ cycles_hi -= 5;
+ cycles_low -= 7;
+ temp = (cycles_hi << PRM_VC_CFG_I2C_CLK_SCLH_SHIFT) |
+ (cycles_low << PRM_VC_CFG_I2C_CLK_SCLL_SHIFT);
+ writel(temp, &prcm->prm_vc_cfg_i2c_clk);
+
+ /* Disable high speed mode and all advanced features */
+ writel(0x0, &prcm->prm_vc_cfg_i2c_mode);
+
+ omap4_rev = omap_revision();
+ /* TPS - supplies vdd_mpu on 4460 */
+ if (omap4_rev >= OMAP4460_ES1_0) {
+ volt = 1430;
+ do_scale_tps62361(TPS62361_REG_ADDR_SET1, volt);
+ }
+
+ /*
+ * VCORE 1
+ *
+ * 4430 : supplies vdd_mpu
+ * Setting a high voltage for Nitro mode as smart reflex is not enabled.
+ * We use the maximum possible value in the AVS range because the next
+ * higher voltage in the discrete range (code >= 0b111010) is way too
+ * high
+ *
+ * 4460 : supplies vdd_core
+ */
+ if (omap4_rev < OMAP4460_ES1_0) {
+ volt = 1417;
+ do_scale_vcore(SMPS_REG_ADDR_VCORE1, volt);
+ } else {
+ volt = 1200;
+ do_scale_vcore(SMPS_REG_ADDR_VCORE1, volt);
+ }
+
+ /* VCORE 2 - supplies vdd_iva */
+ volt = 1200;
+ do_scale_vcore(SMPS_REG_ADDR_VCORE2, volt);
+
+ /*
+ * VCORE 3
+ * 4430 : supplies vdd_core
+ * 4460 : not connected
+ */
+ if (omap4_rev < OMAP4460_ES1_0) {
+ volt = 1200;
+ do_scale_vcore(SMPS_REG_ADDR_VCORE3, volt);
+ }
+}
+
+static inline void enable_clock_domain(u32 *const clkctrl_reg, u32 enable_mode)
+{
+ clrsetbits_le32(clkctrl_reg, CD_CLKCTRL_CLKTRCTRL_MASK,
+ enable_mode << CD_CLKCTRL_CLKTRCTRL_SHIFT);
+ debug("Enable clock domain - %p\n", clkctrl_reg);
+}
+
+static inline void wait_for_clk_enable(u32 *clkctrl_addr)
+{
+ u32 clkctrl, idlest = MODULE_CLKCTRL_IDLEST_DISABLED;
+ u32 bound = LDELAY;
+
+ while ((idlest == MODULE_CLKCTRL_IDLEST_DISABLED) ||
+ (idlest == MODULE_CLKCTRL_IDLEST_TRANSITIONING)) {
+
+ clkctrl = readl(clkctrl_addr);
+ idlest = (clkctrl & MODULE_CLKCTRL_IDLEST_MASK) >>
+ MODULE_CLKCTRL_IDLEST_SHIFT;
+ if (--bound == 0) {
+ printf("Clock enable failed for 0x%p idlest 0x%x\n",
+ clkctrl_addr, clkctrl);
+ return;
+ }
+ }
+}
+
+static inline void enable_clock_module(u32 *const clkctrl_addr, u32 enable_mode,
+ u32 wait_for_enable)
+{
+ clrsetbits_le32(clkctrl_addr, MODULE_CLKCTRL_MODULEMODE_MASK,
+ enable_mode << MODULE_CLKCTRL_MODULEMODE_SHIFT);
+ debug("Enable clock module - %p\n", clkctrl_addr);
+ if (wait_for_enable)
+ wait_for_clk_enable(clkctrl_addr);
+}
+
+/*
+ * Enable essential clock domains, modules and
+ * do some additional special settings needed
+ */
+static void enable_basic_clocks(void)
+{
+ u32 i, max = 100, wait_for_enable = 1;
+ u32 *const clk_domains_essential[] = {
+ &prcm->cm_l4per_clkstctrl,
+ &prcm->cm_l3init_clkstctrl,
+ &prcm->cm_memif_clkstctrl,
+ &prcm->cm_l4cfg_clkstctrl,
+ 0
+ };
+
+ u32 *const clk_modules_hw_auto_essential[] = {
+ &prcm->cm_wkup_gpio1_clkctrl,
+ &prcm->cm_l4per_gpio2_clkctrl,
+ &prcm->cm_l4per_gpio3_clkctrl,
+ &prcm->cm_l4per_gpio4_clkctrl,
+ &prcm->cm_l4per_gpio5_clkctrl,
+ &prcm->cm_l4per_gpio6_clkctrl,
+ &prcm->cm_memif_emif_1_clkctrl,
+ &prcm->cm_memif_emif_2_clkctrl,
+ &prcm->cm_l3init_hsusbotg_clkctrl,
+ &prcm->cm_l3init_usbphy_clkctrl,
+ &prcm->cm_l4cfg_l4_cfg_clkctrl,
+ 0
+ };
+
+ u32 *const clk_modules_explicit_en_essential[] = {
+ &prcm->cm_l4per_gptimer2_clkctrl,
+ &prcm->cm_l3init_hsmmc1_clkctrl,
+ &prcm->cm_l3init_hsmmc2_clkctrl,
+ &prcm->cm_l4per_mcspi1_clkctrl,
+ &prcm->cm_wkup_gptimer1_clkctrl,
+ &prcm->cm_l4per_i2c1_clkctrl,
+ &prcm->cm_l4per_i2c2_clkctrl,
+ &prcm->cm_l4per_i2c3_clkctrl,
+ &prcm->cm_l4per_i2c4_clkctrl,
+ &prcm->cm_wkup_wdtimer2_clkctrl,
+ &prcm->cm_l4per_uart3_clkctrl,
+ 0
+ };
+
+ /* Enable optional additional functional clock for GPIO4 */
+ setbits_le32(&prcm->cm_l4per_gpio4_clkctrl,
+ GPIO4_CLKCTRL_OPTFCLKEN_MASK);
+
+ /* Enable 96 MHz clock for MMC1 & MMC2 */
+ setbits_le32(&prcm->cm_l3init_hsmmc1_clkctrl,
+ HSMMC_CLKCTRL_CLKSEL_MASK);
+ setbits_le32(&prcm->cm_l3init_hsmmc2_clkctrl,
+ HSMMC_CLKCTRL_CLKSEL_MASK);
+
+ /* Select 32KHz clock as the source of GPTIMER1 */
+ setbits_le32(&prcm->cm_wkup_gptimer1_clkctrl,
+ GPTIMER1_CLKCTRL_CLKSEL_MASK);
+
+ /* Enable optional 48M functional clock for USB PHY */
+ setbits_le32(&prcm->cm_l3init_usbphy_clkctrl,
+ USBPHY_CLKCTRL_OPTFCLKEN_PHY_48M_MASK);
+
+ /* Put the clock domains in SW_WKUP mode */
+ for (i = 0; (i < max) && clk_domains_essential[i]; i++) {
+ enable_clock_domain(clk_domains_essential[i],
+ CD_CLKCTRL_CLKTRCTRL_SW_WKUP);
+ }
+
+ /* Clock modules that need to be put in HW_AUTO */
+ for (i = 0; (i < max) && clk_modules_hw_auto_essential[i]; i++) {
+ enable_clock_module(clk_modules_hw_auto_essential[i],
+ MODULE_CLKCTRL_MODULEMODE_HW_AUTO,
+ wait_for_enable);
+ };
+
+ /* Clock modules that need to be put in SW_EXPLICIT_EN mode */
+ for (i = 0; (i < max) && clk_modules_explicit_en_essential[i]; i++) {
+ enable_clock_module(clk_modules_explicit_en_essential[i],
+ MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN,
+ wait_for_enable);
+ };
+
+ /* Put the clock domains in HW_AUTO mode now */
+ for (i = 0; (i < max) && clk_domains_essential[i]; i++) {
+ enable_clock_domain(clk_domains_essential[i],
+ CD_CLKCTRL_CLKTRCTRL_HW_AUTO);
+ }
+}
+
+/*
+ * Enable non-essential clock domains, modules and
+ * do some additional special settings needed
+ */
+static void enable_non_essential_clocks(void)
+{
+ u32 i, max = 100, wait_for_enable = 0;
+ u32 *const clk_domains_non_essential[] = {
+ &prcm->cm_mpu_m3_clkstctrl,
+ &prcm->cm_ivahd_clkstctrl,
+ &prcm->cm_dsp_clkstctrl,
+ &prcm->cm_dss_clkstctrl,
+ &prcm->cm_sgx_clkstctrl,
+ &prcm->cm1_abe_clkstctrl,
+ &prcm->cm_c2c_clkstctrl,
+ &prcm->cm_cam_clkstctrl,
+ &prcm->cm_dss_clkstctrl,
+ &prcm->cm_sdma_clkstctrl,
+ 0
+ };
+
+ u32 *const clk_modules_hw_auto_non_essential[] = {
+ &prcm->cm_mpu_m3_mpu_m3_clkctrl,
+ &prcm->cm_ivahd_ivahd_clkctrl,
+ &prcm->cm_ivahd_sl2_clkctrl,
+ &prcm->cm_dsp_dsp_clkctrl,
+ &prcm->cm_l3_2_gpmc_clkctrl,
+ &prcm->cm_l3instr_l3_3_clkctrl,
+ &prcm->cm_l3instr_l3_instr_clkctrl,
+ &prcm->cm_l3instr_intrconn_wp1_clkctrl,
+ &prcm->cm_l3init_hsi_clkctrl,
+ &prcm->cm_l3init_hsusbtll_clkctrl,
+ 0
+ };
+
+ u32 *const clk_modules_explicit_en_non_essential[] = {
+ &prcm->cm1_abe_aess_clkctrl,
+ &prcm->cm1_abe_pdm_clkctrl,
+ &prcm->cm1_abe_dmic_clkctrl,
+ &prcm->cm1_abe_mcasp_clkctrl,
+ &prcm->cm1_abe_mcbsp1_clkctrl,
+ &prcm->cm1_abe_mcbsp2_clkctrl,
+ &prcm->cm1_abe_mcbsp3_clkctrl,
+ &prcm->cm1_abe_slimbus_clkctrl,
+ &prcm->cm1_abe_timer5_clkctrl,
+ &prcm->cm1_abe_timer6_clkctrl,
+ &prcm->cm1_abe_timer7_clkctrl,
+ &prcm->cm1_abe_timer8_clkctrl,
+ &prcm->cm1_abe_wdt3_clkctrl,
+ &prcm->cm_l4per_gptimer9_clkctrl,
+ &prcm->cm_l4per_gptimer10_clkctrl,
+ &prcm->cm_l4per_gptimer11_clkctrl,
+ &prcm->cm_l4per_gptimer3_clkctrl,
+ &prcm->cm_l4per_gptimer4_clkctrl,
+ &prcm->cm_l4per_hdq1w_clkctrl,
+ &prcm->cm_l4per_mcbsp4_clkctrl,
+ &prcm->cm_l4per_mcspi2_clkctrl,
+ &prcm->cm_l4per_mcspi3_clkctrl,
+ &prcm->cm_l4per_mcspi4_clkctrl,
+ &prcm->cm_l4per_mmcsd3_clkctrl,
+ &prcm->cm_l4per_mmcsd4_clkctrl,
+ &prcm->cm_l4per_mmcsd5_clkctrl,
+ &prcm->cm_l4per_uart1_clkctrl,
+ &prcm->cm_l4per_uart2_clkctrl,
+ &prcm->cm_l4per_uart4_clkctrl,
+ &prcm->cm_wkup_keyboard_clkctrl,
+ &prcm->cm_wkup_wdtimer2_clkctrl,
+ &prcm->cm_cam_iss_clkctrl,
+ &prcm->cm_cam_fdif_clkctrl,
+ &prcm->cm_dss_dss_clkctrl,
+ &prcm->cm_sgx_sgx_clkctrl,
+ &prcm->cm_l3init_hsusbhost_clkctrl,
+ &prcm->cm_l3init_fsusb_clkctrl,
+ 0
+ };
+
+ /* Enable optional functional clock for ISS */
+ setbits_le32(&prcm->cm_cam_iss_clkctrl, ISS_CLKCTRL_OPTFCLKEN_MASK);
+
+ /* Enable all optional functional clocks of DSS */
+ setbits_le32(&prcm->cm_dss_dss_clkctrl, DSS_CLKCTRL_OPTFCLKEN_MASK);
+
+
+ /* Put the clock domains in SW_WKUP mode */
+ for (i = 0; (i < max) && clk_domains_non_essential[i]; i++) {
+ enable_clock_domain(clk_domains_non_essential[i],
+ CD_CLKCTRL_CLKTRCTRL_SW_WKUP);
+ }
+
+ /* Clock modules that need to be put in HW_AUTO */
+ for (i = 0; (i < max) && clk_modules_hw_auto_non_essential[i]; i++) {
+ enable_clock_module(clk_modules_hw_auto_non_essential[i],
+ MODULE_CLKCTRL_MODULEMODE_HW_AUTO,
+ wait_for_enable);
+ };
+
+ /* Clock modules that need to be put in SW_EXPLICIT_EN mode */
+ for (i = 0; (i < max) && clk_modules_explicit_en_non_essential[i];
+ i++) {
+ enable_clock_module(clk_modules_explicit_en_non_essential[i],
+ MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN,
+ wait_for_enable);
+ };
+
+ /* Put the clock domains in HW_AUTO mode now */
+ for (i = 0; (i < max) && clk_domains_non_essential[i]; i++) {
+ enable_clock_domain(clk_domains_non_essential[i],
+ CD_CLKCTRL_CLKTRCTRL_HW_AUTO);
+ }
+
+ /* Put camera module in no sleep mode */
+ clrsetbits_le32(&prcm->cm_cam_clkstctrl, MODULE_CLKCTRL_MODULEMODE_MASK,
+ CD_CLKCTRL_CLKTRCTRL_NO_SLEEP <<
+ MODULE_CLKCTRL_MODULEMODE_SHIFT);
+}
+
+
+void freq_update_core(void)
+{
+ u32 freq_config1 = 0;
+ const struct dpll_params *core_dpll_params;
+
+ core_dpll_params = get_core_dpll_params();
+ /* Put EMIF clock domain in sw wakeup mode */
+ enable_clock_domain(&prcm->cm_memif_clkstctrl,
+ CD_CLKCTRL_CLKTRCTRL_SW_WKUP);
+ wait_for_clk_enable(&prcm->cm_memif_emif_1_clkctrl);
+ wait_for_clk_enable(&prcm->cm_memif_emif_2_clkctrl);
+
+ freq_config1 = SHADOW_FREQ_CONFIG1_FREQ_UPDATE_MASK |
+ SHADOW_FREQ_CONFIG1_DLL_RESET_MASK;
+
+ freq_config1 |= (DPLL_EN_LOCK << SHADOW_FREQ_CONFIG1_DPLL_EN_SHIFT) &
+ SHADOW_FREQ_CONFIG1_DPLL_EN_MASK;
+
+ freq_config1 |= (core_dpll_params->m2 <<
+ SHADOW_FREQ_CONFIG1_M2_DIV_SHIFT) &
+ SHADOW_FREQ_CONFIG1_M2_DIV_MASK;
+
+ writel(freq_config1, &prcm->cm_shadow_freq_config1);
+ if (!wait_on_value(SHADOW_FREQ_CONFIG1_FREQ_UPDATE_MASK, 0,
+ &prcm->cm_shadow_freq_config1, LDELAY)) {
+ puts("FREQ UPDATE procedure failed!!");
+ hang();
+ }
+
+ /* Put EMIF clock domain back in hw auto mode */
+ enable_clock_domain(&prcm->cm_memif_clkstctrl,
+ CD_CLKCTRL_CLKTRCTRL_HW_AUTO);
+ wait_for_clk_enable(&prcm->cm_memif_emif_1_clkctrl);
+ wait_for_clk_enable(&prcm->cm_memif_emif_2_clkctrl);
+}
+
+void bypass_dpll(u32 *const base)
+{
+ do_bypass_dpll(base);
+ wait_for_bypass(base);
+}
+
+void lock_dpll(u32 *const base)
+{
+ do_lock_dpll(base);
+ wait_for_lock(base);
+}
+
+void setup_clocks_for_console(void)
+{
+ /* Do not add any spl_debug prints in this function */
+ clrsetbits_le32(&prcm->cm_l4per_clkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
+ CD_CLKCTRL_CLKTRCTRL_SW_WKUP <<
+ CD_CLKCTRL_CLKTRCTRL_SHIFT);
+
+ /* Enable all UARTs - console will be on one of them */
+ clrsetbits_le32(&prcm->cm_l4per_uart1_clkctrl,
+ MODULE_CLKCTRL_MODULEMODE_MASK,
+ MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+ MODULE_CLKCTRL_MODULEMODE_SHIFT);
+
+ clrsetbits_le32(&prcm->cm_l4per_uart2_clkctrl,
+ MODULE_CLKCTRL_MODULEMODE_MASK,
+ MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+ MODULE_CLKCTRL_MODULEMODE_SHIFT);
+
+ clrsetbits_le32(&prcm->cm_l4per_uart3_clkctrl,
+ MODULE_CLKCTRL_MODULEMODE_MASK,
+ MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+ MODULE_CLKCTRL_MODULEMODE_SHIFT);
+
+ clrsetbits_le32(&prcm->cm_l4per_uart3_clkctrl,
+ MODULE_CLKCTRL_MODULEMODE_MASK,
+ MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+ MODULE_CLKCTRL_MODULEMODE_SHIFT);
+
+ clrsetbits_le32(&prcm->cm_l4per_clkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
+ CD_CLKCTRL_CLKTRCTRL_HW_AUTO <<
+ CD_CLKCTRL_CLKTRCTRL_SHIFT);
+}
+
+void prcm_init(void)
+{
+ switch (omap4_hw_init_context()) {
+ case OMAP_INIT_CONTEXT_SPL:
+ case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
+ case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
+ enable_basic_clocks();
+ scale_vcores();
+ setup_dplls();
+ setup_non_essential_dplls();
+ enable_non_essential_clocks();
+ break;
+ default:
+ break;
+ }
+}
generated by cgit v1.1 at 2024-11-22 01:33:48 +0000