/** * OMAP and TWL PMIC specific intializations. * * Copyright (C) 2010 Texas Instruments Incorporated. * Thara Gopinath * Copyright (C) 2009 Texas Instruments Incorporated. * Nishanth Menon * Copyright (C) 2009 Nokia Corporation * Paul Walmsley * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include "voltage.h" #include "pm.h" #define OMAP3_SRI2C_SLAVE_ADDR 0x12 #define OMAP3_VDD_MPU_SR_CONTROL_REG 0x00 #define OMAP3_VDD_CORE_SR_CONTROL_REG 0x01 #define OMAP3_VP_CONFIG_ERROROFFSET 0x00 #define OMAP3_VP_VSTEPMIN_VSTEPMIN 0x1 #define OMAP3_VP_VSTEPMAX_VSTEPMAX 0x04 #define OMAP3_VP_VLIMITTO_TIMEOUT_US 200 #define OMAP3430_VP1_VLIMITTO_VDDMIN 0x14 #define OMAP3430_VP1_VLIMITTO_VDDMAX 0x42 #define OMAP3430_VP2_VLIMITTO_VDDMIN 0x18 #define OMAP3430_VP2_VLIMITTO_VDDMAX 0x2c #define OMAP3630_VP1_VLIMITTO_VDDMIN 0x18 #define OMAP3630_VP1_VLIMITTO_VDDMAX 0x3c #define OMAP3630_VP2_VLIMITTO_VDDMIN 0x18 #define OMAP3630_VP2_VLIMITTO_VDDMAX 0x30 #define OMAP4_SRI2C_SLAVE_ADDR 0x12 #define OMAP4_VDD_MPU_SR_VOLT_REG 0x55 #define OMAP4_VDD_IVA_SR_VOLT_REG 0x5B #define OMAP4_VDD_CORE_SR_VOLT_REG 0x61 #define OMAP4_VP_CONFIG_ERROROFFSET 0x00 #define OMAP4_VP_VSTEPMIN_VSTEPMIN 0x01 #define OMAP4_VP_VSTEPMAX_VSTEPMAX 0x04 #define OMAP4_VP_VLIMITTO_TIMEOUT_US 200 #define OMAP4_VP_MPU_VLIMITTO_VDDMIN 0xA #define OMAP4_VP_MPU_VLIMITTO_VDDMAX 0x39 #define OMAP4_VP_IVA_VLIMITTO_VDDMIN 0xA #define OMAP4_VP_IVA_VLIMITTO_VDDMAX 0x2D #define OMAP4_VP_CORE_VLIMITTO_VDDMIN 0xA #define OMAP4_VP_CORE_VLIMITTO_VDDMAX 0x28 static bool is_offset_valid; static u8 smps_offset; /* * Flag to ensure Smartreflex bit in TWL * being cleared in board file is not overwritten. */ static bool __initdata twl_sr_enable_autoinit; #define TWL4030_DCDC_GLOBAL_CFG 0x06 #define REG_SMPS_OFFSET 0xE0 #define SMARTREFLEX_ENABLE BIT(3) static unsigned long twl4030_vsel_to_uv(const u8 vsel) { return (((vsel * 125) + 6000)) * 100; } static u8 twl4030_uv_to_vsel(unsigned long uv) { return DIV_ROUND_UP(uv - 600000, 12500); } static unsigned long twl6030_vsel_to_uv(const u8 vsel) { /* * In TWL6030 depending on the value of SMPS_OFFSET * efuse register the voltage range supported in * standard mode can be either between 0.6V - 1.3V or * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse * is programmed to all 0's where as starting from * TWL6030 ES1.1 the efuse is programmed to 1 */ if (!is_offset_valid) { twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset, REG_SMPS_OFFSET); is_offset_valid = true; } /* * There is no specific formula for voltage to vsel * conversion above 1.3V. There are special hardcoded * values for voltages above 1.3V. Currently we are * hardcoding only for 1.35 V which is used for 1GH OPP for * OMAP4430. */ if (vsel == 0x3A) return 1350000; if (smps_offset & 0x8) return ((((vsel - 1) * 125) + 7000)) * 100; else return ((((vsel - 1) * 125) + 6000)) * 100; } static u8 twl6030_uv_to_vsel(unsigned long uv) { /* * In TWL6030 depending on the value of SMPS_OFFSET * efuse register the voltage range supported in * standard mode can be either between 0.6V - 1.3V or * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse * is programmed to all 0's where as starting from * TWL6030 ES1.1 the efuse is programmed to 1 */ if (!is_offset_valid) { twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset, REG_SMPS_OFFSET); is_offset_valid = true; } /* * There is no specific formula for voltage to vsel * conversion above 1.3V. There are special hardcoded * values for voltages above 1.3V. Currently we are * hardcoding only for 1.35 V which is used for 1GH OPP for * OMAP4430. */ if (uv == 1350000) return 0x3A; if (smps_offset & 0x8) return DIV_ROUND_UP(uv - 700000, 12500) + 1; else return DIV_ROUND_UP(uv - 600000, 12500) + 1; } static struct omap_volt_pmic_info omap3_mpu_volt_info = { .slew_rate = 4000, .step_size = 12500, .on_volt = 1200000, .onlp_volt = 1000000, .ret_volt = 975000, .off_volt = 600000, .volt_setup_time = 0xfff, .vp_erroroffset = OMAP3_VP_CONFIG_ERROROFFSET, .vp_vstepmin = OMAP3_VP_VSTEPMIN_VSTEPMIN, .vp_vstepmax = OMAP3_VP_VSTEPMAX_VSTEPMAX, .vp_vddmin = OMAP3430_VP1_VLIMITTO_VDDMIN, .vp_vddmax = OMAP3430_VP1_VLIMITTO_VDDMAX, .vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US, .i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR, .pmic_reg = OMAP3_VDD_MPU_SR_CONTROL_REG, .vsel_to_uv = twl4030_vsel_to_uv, .uv_to_vsel = twl4030_uv_to_vsel, }; static struct omap_volt_pmic_info omap3_core_volt_info = { .slew_rate = 4000, .step_size = 12500, .on_volt = 1200000, .onlp_volt = 1000000, .ret_volt = 975000, .off_volt = 600000, .volt_setup_time = 0xfff, .vp_erroroffset = OMAP3_VP_CONFIG_ERROROFFSET, .vp_vstepmin = OMAP3_VP_VSTEPMIN_VSTEPMIN, .vp_vstepmax = OMAP3_VP_VSTEPMAX_VSTEPMAX, .vp_vddmin = OMAP3430_VP2_VLIMITTO_VDDMIN, .vp_vddmax = OMAP3430_VP2_VLIMITTO_VDDMAX, .vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US, .i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR, .pmic_reg = OMAP3_VDD_CORE_SR_CONTROL_REG, .vsel_to_uv = twl4030_vsel_to_uv, .uv_to_vsel = twl4030_uv_to_vsel, }; static struct omap_volt_pmic_info omap4_mpu_volt_info = { .slew_rate = 4000, .step_size = 12500, .on_volt = 1350000, .onlp_volt = 1350000, .ret_volt = 837500, .off_volt = 600000, .volt_setup_time = 0, .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET, .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN, .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX, .vp_vddmin = OMAP4_VP_MPU_VLIMITTO_VDDMIN, .vp_vddmax = OMAP4_VP_MPU_VLIMITTO_VDDMAX, .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US, .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR, .pmic_reg = OMAP4_VDD_MPU_SR_VOLT_REG, .vsel_to_uv = twl6030_vsel_to_uv, .uv_to_vsel = twl6030_uv_to_vsel, }; static struct omap_volt_pmic_info omap4_iva_volt_info = { .slew_rate = 4000, .step_size = 12500, .on_volt = 1100000, .onlp_volt = 1100000, .ret_volt = 837500, .off_volt = 600000, .volt_setup_time = 0, .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET, .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN, .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX, .vp_vddmin = OMAP4_VP_IVA_VLIMITTO_VDDMIN, .vp_vddmax = OMAP4_VP_IVA_VLIMITTO_VDDMAX, .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US, .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR, .pmic_reg = OMAP4_VDD_IVA_SR_VOLT_REG, .vsel_to_uv = twl6030_vsel_to_uv, .uv_to_vsel = twl6030_uv_to_vsel, }; static struct omap_volt_pmic_info omap4_core_volt_info = { .slew_rate = 4000, .step_size = 12500, .on_volt = 1100000, .onlp_volt = 1100000, .ret_volt = 837500, .off_volt = 600000, .volt_setup_time = 0, .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET, .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN, .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX, .vp_vddmin = OMAP4_VP_CORE_VLIMITTO_VDDMIN, .vp_vddmax = OMAP4_VP_CORE_VLIMITTO_VDDMAX, .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US, .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR, .pmic_reg = OMAP4_VDD_CORE_SR_VOLT_REG, .vsel_to_uv = twl6030_vsel_to_uv, .uv_to_vsel = twl6030_uv_to_vsel, }; int __init omap4_twl_init(void) { struct voltagedomain *voltdm; if (!cpu_is_omap44xx()) return -ENODEV; voltdm = voltdm_lookup("mpu"); omap_voltage_register_pmic(voltdm, &omap4_mpu_volt_info); voltdm = voltdm_lookup("iva"); omap_voltage_register_pmic(voltdm, &omap4_iva_volt_info); voltdm = voltdm_lookup("core"); omap_voltage_register_pmic(voltdm, &omap4_core_volt_info); return 0; } int __init omap3_twl_init(void) { struct voltagedomain *voltdm; if (!cpu_is_omap34xx()) return -ENODEV; if (cpu_is_omap3630()) { omap3_mpu_volt_info.vp_vddmin = OMAP3630_VP1_VLIMITTO_VDDMIN; omap3_mpu_volt_info.vp_vddmax = OMAP3630_VP1_VLIMITTO_VDDMAX; omap3_core_volt_info.vp_vddmin = OMAP3630_VP2_VLIMITTO_VDDMIN; omap3_core_volt_info.vp_vddmax = OMAP3630_VP2_VLIMITTO_VDDMAX; } /* * The smartreflex bit on twl4030 specifies if the setting of voltage * is done over the I2C_SR path. Since this setting is independent of * the actual usage of smartreflex AVS module, we enable TWL SR bit * by default irrespective of whether smartreflex AVS module is enabled * on the OMAP side or not. This is because without this bit enabled, * the voltage scaling through vp forceupdate/bypass mechanism of * voltage scaling will not function on TWL over I2C_SR. */ if (!twl_sr_enable_autoinit) omap3_twl_set_sr_bit(true); voltdm = voltdm_lookup("mpu_iva"); omap_voltage_register_pmic(voltdm, &omap3_mpu_volt_info); voltdm = voltdm_lookup("core"); omap_voltage_register_pmic(voltdm, &omap3_core_volt_info); return 0; } /** * omap3_twl_set_sr_bit() - Set/Clear SR bit on TWL * @enable: enable SR mode in twl or not * * If 'enable' is true, enables Smartreflex bit on TWL 4030 to make sure * voltage scaling through OMAP SR works. Else, the smartreflex bit * on twl4030 is cleared as there are platforms which use OMAP3 and T2 but * use Synchronized Scaling Hardware Strategy (ENABLE_VMODE=1) and Direct * Strategy Software Scaling Mode (ENABLE_VMODE=0), for setting the voltages, * in those scenarios this bit is to be cleared (enable = false). * * Returns 0 on success, error is returned if I2C read/write fails. */ int __init omap3_twl_set_sr_bit(bool enable) { u8 temp; int ret; if (twl_sr_enable_autoinit) pr_warning("%s: unexpected multiple calls\n", __func__); ret = twl_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &temp, TWL4030_DCDC_GLOBAL_CFG); if (ret) goto err; if (enable) temp |= SMARTREFLEX_ENABLE; else temp &= ~SMARTREFLEX_ENABLE; ret = twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, temp, TWL4030_DCDC_GLOBAL_CFG); if (!ret) { twl_sr_enable_autoinit = true; return 0; } err: pr_err("%s: Error access to TWL4030 (%d)\n", __func__, ret); return ret; }