--- /dev/null
+/*
+ *
+ * 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>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <common.h>
+#include <i2c.h>
+#include <asm/omap_common.h>
+#include <asm/gpio.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/utils.h>
+#include <asm/omap_gpio.h>
+#include <asm/emif.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
+
+const u32 sys_clk_array[8] = {
+ 12000000, /* 12 MHz */
+ 20000000, /* 20 MHz */
+ 16800000, /* 16.8 MHz */
+ 19200000, /* 19.2 MHz */
+ 26000000, /* 26 MHz */
+ 27000000, /* 27 MHz */
+ 38400000, /* 38.4 MHz */
+};
+
+static inline u32 __get_sys_clk_index(void)
+{
+ s8 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];
+}
+
+void setup_post_dividers(u32 const base, const struct dpll_params *params)
+{
+ struct dpll_regs *const dpll_regs = (struct dpll_regs *)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_h11 >= 0)
+ writel(params->m4_h11, &dpll_regs->cm_div_m4_h11_dpll);
+ if (params->m5_h12 >= 0)
+ writel(params->m5_h12, &dpll_regs->cm_div_m5_h12_dpll);
+ if (params->m6_h13 >= 0)
+ writel(params->m6_h13, &dpll_regs->cm_div_m6_h13_dpll);
+ if (params->m7_h14 >= 0)
+ writel(params->m7_h14, &dpll_regs->cm_div_m7_h14_dpll);
+ if (params->h21 >= 0)
+ writel(params->h21, &dpll_regs->cm_div_h21_dpll);
+ if (params->h22 >= 0)
+ writel(params->h22, &dpll_regs->cm_div_h22_dpll);
+ if (params->h23 >= 0)
+ writel(params->h23, &dpll_regs->cm_div_h23_dpll);
+ if (params->h24 >= 0)
+ writel(params->h24, &dpll_regs->cm_div_h24_dpll);
+}
+
+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 %x\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 %x\n", base);
+ hang();
+ }
+}
+
+inline u32 check_for_lock(u32 const base)
+{
+ struct dpll_regs *const dpll_regs = (struct dpll_regs *)base;
+ u32 lock = readl(&dpll_regs->cm_idlest_dpll) & ST_DPLL_CLK_MASK;
+
+ return lock;
+}
+
+const struct dpll_params *get_mpu_dpll_params(struct dplls const *dpll_data)
+{
+ u32 sysclk_ind = get_sys_clk_index();
+ return &dpll_data->mpu[sysclk_ind];
+}
+
+const struct dpll_params *get_core_dpll_params(struct dplls const *dpll_data)
+{
+ u32 sysclk_ind = get_sys_clk_index();
+ return &dpll_data->core[sysclk_ind];
+}
+
+const struct dpll_params *get_per_dpll_params(struct dplls const *dpll_data)
+{
+ u32 sysclk_ind = get_sys_clk_index();
+ return &dpll_data->per[sysclk_ind];
+}
+
+const struct dpll_params *get_iva_dpll_params(struct dplls const *dpll_data)
+{
+ u32 sysclk_ind = get_sys_clk_index();
+ return &dpll_data->iva[sysclk_ind];
+}
+
+const struct dpll_params *get_usb_dpll_params(struct dplls const *dpll_data)
+{
+ u32 sysclk_ind = get_sys_clk_index();
+ return &dpll_data->usb[sysclk_ind];
+}
+
+const struct dpll_params *get_abe_dpll_params(struct dplls const *dpll_data)
+{
+#ifdef CONFIG_SYS_OMAP_ABE_SYSCK
+ u32 sysclk_ind = get_sys_clk_index();
+ return &dpll_data->abe[sysclk_ind];
+#else
+ return dpll_data->abe;
+#endif
+}
+
+static const struct dpll_params *get_ddr_dpll_params
+ (struct dplls const *dpll_data)
+{
+ u32 sysclk_ind = get_sys_clk_index();
+
+ if (!dpll_data->ddr)
+ return NULL;
+ return &dpll_data->ddr[sysclk_ind];
+}
+
+#ifdef CONFIG_DRIVER_TI_CPSW
+static const struct dpll_params *get_gmac_dpll_params
+ (struct dplls const *dpll_data)
+{
+ u32 sysclk_ind = get_sys_clk_index();
+
+ if (!dpll_data->gmac)
+ return NULL;
+ return &dpll_data->gmac[sysclk_ind];
+}
+#endif
+
+static void do_setup_dpll(u32 const base, const struct dpll_params *params,
+ u8 lock, char *dpll)
+{
+ u32 temp, M, N;
+ struct dpll_regs *const dpll_regs = (struct dpll_regs *)base;
+
+ if (!params)
+ return;
+
+ temp = readl(&dpll_regs->cm_clksel_dpll);
+
+ if (check_for_lock(base)) {
+ /*
+ * The Dpll has already been locked by rom code using CH.
+ * Check if M,N are matching with Ideal nominal opp values.
+ * If matches, skip the rest otherwise relock.
+ */
+ M = (temp & CM_CLKSEL_DPLL_M_MASK) >> CM_CLKSEL_DPLL_M_SHIFT;
+ N = (temp & CM_CLKSEL_DPLL_N_MASK) >> CM_CLKSEL_DPLL_N_SHIFT;
+ if ((M != (params->m)) || (N != (params->n))) {
+ debug("\n %s Dpll locked, but not for ideal M = %d,"
+ "N = %d values, current values are M = %d,"
+ "N= %d" , dpll, params->m, params->n,
+ M, N);
+ } else {
+ /* Dpll locked with ideal values for nominal opps. */
+ debug("\n %s Dpll already locked with ideal"
+ "nominal opp values", dpll);
+ goto setup_post_dividers;
+ }
+ }
+
+ bypass_dpll(base);
+
+ /* Set M & N */
+ 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:
+ setup_post_dividers(base, params);
+
+ /* Wait till the DPLL locks */
+ if (lock)
+ wait_for_lock(base);
+}
+
+u32 omap_ddr_clk(void)
+{
+ u32 ddr_clk, sys_clk_khz, omap_rev, divider;
+ const struct dpll_params *core_dpll_params;
+
+ omap_rev = omap_revision();
+ sys_clk_khz = get_sys_clk_freq() / 1000;
+
+ core_dpll_params = get_core_dpll_params(*dplls_data);
+
+ 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);
+
+ if (omap_rev < OMAP5430_ES1_0) {
+ /*
+ * DDR frequency is PHY_ROOT_CLK/2
+ * PHY_ROOT_CLK = Fdpll/2/M2
+ */
+ divider = 4;
+ } else {
+ /*
+ * DDR frequency is PHY_ROOT_CLK
+ * PHY_ROOT_CLK = Fdpll/2/M2
+ */
+ divider = 2;
+ }
+
+ ddr_clk = ddr_clk / divider / 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 omap_rev;
+ omap_rev = omap_revision();
+
+ /*
+ * DCC and clock divider settings for 4460.
+ * DCC is required, if more than a certain frequency is required.
+ * For, 4460 > 1GHZ.
+ * 5430 > 1.4GHZ.
+ */
+ if ((omap_rev >= OMAP4460_ES1_0) && (omap_rev < OMAP5430_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);
+ }
+
+ params = get_mpu_dpll_params(*dplls_data);
+
+ do_setup_dpll((*prcm)->cm_clkmode_dpll_mpu, params, DPLL_LOCK, "mpu");
+ debug("MPU DPLL locked\n");
+}
+
+#if defined(CONFIG_USB_EHCI_OMAP) || defined(CONFIG_USB_XHCI_OMAP)
+static void setup_usb_dpll(void)
+{
+ const struct dpll_params *params;
+ u32 sys_clk_khz, sd_div, num, den;
+
+ sys_clk_khz = get_sys_clk_freq() / 1000;
+ /*
+ * 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 = get_usb_dpll_params(*dplls_data);
+ 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, "usb");
+}
+#endif
+
+static void setup_dplls(void)
+{
+ u32 temp;
+ const struct dpll_params *params;
+
+ debug("setup_dplls\n");
+
+ /* CORE dpll */
+ params = get_core_dpll_params(*dplls_data); /* 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())
+ */
+ if (emif_sdram_type() == EMIF_SDRAM_TYPE_LPDDR2)
+ do_setup_dpll((*prcm)->cm_clkmode_dpll_core, params,
+ DPLL_NO_LOCK, "core");
+ else
+ do_setup_dpll((*prcm)->cm_clkmode_dpll_core, params,
+ DPLL_LOCK, "core");
+ /* 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 */
+ params = get_per_dpll_params(*dplls_data);
+ do_setup_dpll((*prcm)->cm_clkmode_dpll_per,
+ params, DPLL_LOCK, "per");
+ debug("PER DPLL locked\n");
+
+ /* MPU dpll */
+ configure_mpu_dpll();
+
+#if defined(CONFIG_USB_EHCI_OMAP) || defined(CONFIG_USB_XHCI_OMAP)
+ setup_usb_dpll();
+#endif
+ params = get_ddr_dpll_params(*dplls_data);
+ do_setup_dpll((*prcm)->cm_clkmode_dpll_ddrphy,
+ params, DPLL_LOCK, "ddr");
+
+#ifdef CONFIG_DRIVER_TI_CPSW
+ params = get_gmac_dpll_params(*dplls_data);
+ do_setup_dpll((*prcm)->cm_clkmode_dpll_gmac, params,
+ DPLL_LOCK, "gmac");
+#endif
+}
+
+u32 get_offset_code(u32 volt_offset, struct pmic_data *pmic)
+{
+ u32 offset_code;
+
+ volt_offset -= pmic->base_offset;
+
+ offset_code = (volt_offset + pmic->step - 1) / pmic->step;
+
+ /*
+ * Offset codes 1-6 all give the base voltage in Palmas
+ * Offset code 0 switches OFF the SMPS
+ */
+ return offset_code + pmic->start_code;
+}
+
+void do_scale_vcore(u32 vcore_reg, u32 volt_mv, struct pmic_data *pmic)
+{
+ u32 offset_code;
+ u32 offset = volt_mv;
+ int ret = 0;
+
+ if (!volt_mv)
+ return;
+
+ pmic->pmic_bus_init();
+ /* See if we can first get the GPIO if needed */
+ if (pmic->gpio_en)
+ ret = gpio_request(pmic->gpio, "PMIC_GPIO");
+
+ if (ret < 0) {
+ printf("%s: gpio %d request failed %d\n", __func__,
+ pmic->gpio, ret);
+ return;
+ }
+
+ /* Pull the GPIO low to select SET0 register, while we program SET1 */
+ if (pmic->gpio_en)
+ gpio_direction_output(pmic->gpio, 0);
+
+ /* convert to uV for better accuracy in the calculations */
+ offset *= 1000;
+
+ offset_code = get_offset_code(offset, pmic);
+
+ debug("do_scale_vcore: volt - %d offset_code - 0x%x\n", volt_mv,
+ offset_code);
+
+ if (pmic->pmic_write(pmic->i2c_slave_addr, vcore_reg, offset_code))
+ printf("Scaling voltage failed for 0x%x\n", vcore_reg);
+
+ if (pmic->gpio_en)
+ gpio_direction_output(pmic->gpio, 1);
+}
+
+static u32 optimize_vcore_voltage(struct volts const *v)
+{
+ u32 val;
+ if (!v->value)
+ return 0;
+ if (!v->efuse.reg)
+ return v->value;
+
+ switch (v->efuse.reg_bits) {
+ case 16:
+ val = readw(v->efuse.reg);
+ break;
+ case 32:
+ val = readl(v->efuse.reg);
+ break;
+ default:
+ printf("Error: efuse 0x%08x bits=%d unknown\n",
+ v->efuse.reg, v->efuse.reg_bits);
+ return v->value;
+ }
+
+ if (!val) {
+ printf("Error: efuse 0x%08x bits=%d val=0, using %d\n",
+ v->efuse.reg, v->efuse.reg_bits, v->value);
+ return v->value;
+ }
+
+ debug("%s:efuse 0x%08x bits=%d Vnom=%d, using efuse value %d\n",
+ __func__, v->efuse.reg, v->efuse.reg_bits, v->value, val);
+ return val;
+}
+
+/*
+ * 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
+ */
+void scale_vcores(struct vcores_data const *vcores)
+{
+ u32 val;
+
+ val = optimize_vcore_voltage(&vcores->core);
+ do_scale_vcore(vcores->core.addr, val, vcores->core.pmic);
+
+ val = optimize_vcore_voltage(&vcores->mpu);
+ do_scale_vcore(vcores->mpu.addr, val, vcores->mpu.pmic);
+
+ /* Configure MPU ABB LDO after scale */
+ abb_setup((*ctrl)->control_std_fuse_opp_vdd_mpu_2,
+ (*ctrl)->control_wkup_ldovbb_mpu_voltage_ctrl,
+ (*prcm)->prm_abbldo_mpu_setup,
+ (*prcm)->prm_abbldo_mpu_ctrl,
+ (*prcm)->prm_irqstatus_mpu_2,
+ OMAP_ABB_MPU_TXDONE_MASK,
+ OMAP_ABB_FAST_OPP);
+
+ val = optimize_vcore_voltage(&vcores->mm);
+ do_scale_vcore(vcores->mm.addr, val, vcores->mm.pmic);
+
+ val = optimize_vcore_voltage(&vcores->gpu);
+ do_scale_vcore(vcores->gpu.addr, val, vcores->gpu.pmic);
+
+ val = optimize_vcore_voltage(&vcores->eve);
+ do_scale_vcore(vcores->eve.addr, val, vcores->eve.pmic);
+
+ val = optimize_vcore_voltage(&vcores->iva);
+ do_scale_vcore(vcores->iva.addr, val, vcores->iva.pmic);
+}
+
+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 - %x\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%x 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 - %x\n", clkctrl_addr);
+ if (wait_for_enable)
+ wait_for_clk_enable(clkctrl_addr);
+}
+
+void freq_update_core(void)
+{
+ u32 freq_config1 = 0;
+ const struct dpll_params *core_dpll_params;
+ u32 omap_rev = omap_revision();
+
+ core_dpll_params = get_core_dpll_params(*dplls_data);
+ /* 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,
+ (u32 *) (*prcm)->cm_shadow_freq_config1, LDELAY)) {
+ puts("FREQ UPDATE procedure failed!!");
+ hang();
+ }
+
+ /*
+ * Putting EMIF in HW_AUTO is seen to be causing issues with
+ * EMIF clocks and the master DLL. Keep EMIF in SW_WKUP
+ * in OMAP5430 ES1.0 silicon
+ */
+ if (omap_rev != OMAP5430_ES1_0) {
+ /* 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_uart4_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 do_enable_clocks(u32 const *clk_domains,
+ u32 const *clk_modules_hw_auto,
+ u32 const *clk_modules_explicit_en,
+ u8 wait_for_enable)
+{
+ u32 i, max = 100;
+
+ /* Put the clock domains in SW_WKUP mode */
+ for (i = 0; (i < max) && clk_domains[i]; i++) {
+ enable_clock_domain(clk_domains[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[i]; i++) {
+ enable_clock_module(clk_modules_hw_auto[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[i]; i++) {
+ enable_clock_module(clk_modules_explicit_en[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[i]; i++) {
+ enable_clock_domain(clk_domains[i],
+ CD_CLKCTRL_CLKTRCTRL_HW_AUTO);
+ }
+}
+
+void prcm_init(void)
+{
+ switch (omap_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();
+ timer_init();
+ scale_vcores(*omap_vcores);
+ setup_dplls();
+ setup_warmreset_time();
+ break;
+ default:
+ break;
+ }
+
+ if (OMAP_INIT_CONTEXT_SPL != omap_hw_init_context())
+ enable_basic_uboot_clocks();
+}
+
+void gpi2c_init(void)
+{
+ static int gpi2c = 1;
+
+ if (gpi2c) {
+ i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED,
+ CONFIG_SYS_OMAP24_I2C_SLAVE);
+ gpi2c = 0;
+ }
+}
Code Review / kvmfornfv.git / blobdiff