diff options
Diffstat (limited to 'arch/arm/cpu/armv7')
| -rw-r--r-- | arch/arm/cpu/armv7/omap-common/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/omap-common/clocks-common.c | 48 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/omap-common/vc.c | 138 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/omap4/clocks.c | 2 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/omap5/clocks.c | 2 |
5 files changed, 146 insertions, 45 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/Makefile b/arch/arm/cpu/armv7/omap-common/Makefile index 447fcd5eff..2a6625f1c4 100644 --- a/arch/arm/cpu/armv7/omap-common/Makefile +++ b/arch/arm/cpu/armv7/omap-common/Makefile @@ -37,6 +37,7 @@ ifneq ($(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX),) COBJS += hwinit-common.o COBJS += clocks-common.o COBJS += emif-common.o +COBJS += vc.o endif ifneq ($(CONFIG_AM33XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX),) diff --git a/arch/arm/cpu/armv7/omap-common/clocks-common.c b/arch/arm/cpu/armv7/omap-common/clocks-common.c index 4e7456992f..90d31567e1 100644 --- a/arch/arm/cpu/armv7/omap-common/clocks-common.c +++ b/arch/arm/cpu/armv7/omap-common/clocks-common.c @@ -362,27 +362,19 @@ static void setup_non_essential_dplls(void) void do_scale_tps62361(u32 reg, u32 volt_mv) { - u32 temp, step; + u32 step; step = volt_mv - TPS62361_BASE_VOLT_MV; step /= 10; - 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)) { + if (omap_vc_bypass_send_value(TPS62361_I2C_SLAVE_ADDR, reg, step)) puts("Scaling voltage failed for vdd_mpu from TPS\n"); - } } void do_scale_vcore(u32 vcore_reg, u32 volt_mv) { - u32 temp, offset_code; + u32 offset_code; u32 step = 12660; /* 12.66 mV represented in uV */ u32 offset = volt_mv; @@ -400,16 +392,9 @@ void do_scale_vcore(u32 vcore_reg, u32 volt_mv) 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)) { + if (omap_vc_bypass_send_value(SMPS_I2C_SLAVE_ADDR, + vcore_reg, offset_code)) printf("Scaling voltage failed for 0x%x\n", vcore_reg); - } } static inline void enable_clock_domain(u32 *const clkctrl_reg, u32 enable_mode) @@ -529,29 +514,6 @@ void setup_clocks_for_console(void) CD_CLKCTRL_CLKTRCTRL_SHIFT); } -void setup_sri2c(void) -{ - u32 sys_clk_khz, cycles_hi, cycles_low, temp; - - 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); -} - void do_enable_clocks(u32 *const *clk_domains, u32 *const *clk_modules_hw_auto, u32 *const *clk_modules_explicit_en, diff --git a/arch/arm/cpu/armv7/omap-common/vc.c b/arch/arm/cpu/armv7/omap-common/vc.c new file mode 100644 index 0000000000..a045b77180 --- /dev/null +++ b/arch/arm/cpu/armv7/omap-common/vc.c @@ -0,0 +1,138 @@ +/* + * Voltage Controller implementation for OMAP + * + * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/ + * Nishanth Menon + * + * 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. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <common.h> +#include <asm/omap_common.h> +#include <asm/arch/sys_proto.h> + +/* + * Define Master code if there are multiple masters on the I2C_SR bus. + * Normally not required + */ +#ifndef CONFIG_OMAP_VC_I2C_HS_MCODE +#define CONFIG_OMAP_VC_I2C_HS_MCODE 0x0 +#endif + +/* Register defines and masks for VC IP Block */ +/* PRM_VC_CFG_I2C_MODE */ +#define PRM_VC_CFG_I2C_MODE_DFILTEREN_BIT (0x1 << 6) +#define PRM_VC_CFG_I2C_MODE_SRMODEEN_BIT (0x1 << 4) +#define PRM_VC_CFG_I2C_MODE_HSMODEEN_BIT (0x1 << 3) +#define PRM_VC_CFG_I2C_MODE_HSMCODE_SHIFT 0x0 +#define PRM_VC_CFG_I2C_MODE_HSMCODE_MASK 0x3 + +/* PRM_VC_CFG_I2C_CLK */ +#define PRM_VC_CFG_I2C_CLK_HSCLL_SHIFT 24 +#define PRM_VC_CFG_I2C_CLK_HSCLL_MASK 0xFF +#define PRM_VC_CFG_I2C_CLK_HSCLH_SHIFT 16 +#define PRM_VC_CFG_I2C_CLK_HSCLH_MASK 0xFF +#define PRM_VC_CFG_I2C_CLK_SCLH_SHIFT 0 +#define PRM_VC_CFG_I2C_CLK_SCLH_MASK 0xFF +#define PRM_VC_CFG_I2C_CLK_SCLL_SHIFT 8 +#define PRM_VC_CFG_I2C_CLK_SCLL_MASK (0xFF << 8) + +/* PRM_VC_VAL_BYPASS */ +#define PRM_VC_VAL_BYPASS_VALID_BIT (0x1 << 24) +#define PRM_VC_VAL_BYPASS_SLAVEADDR_SHIFT 0 +#define PRM_VC_VAL_BYPASS_SLAVEADDR_MASK 0x7F +#define PRM_VC_VAL_BYPASS_REGADDR_SHIFT 8 +#define PRM_VC_VAL_BYPASS_REGADDR_MASK 0xFF +#define PRM_VC_VAL_BYPASS_DATA_SHIFT 16 +#define PRM_VC_VAL_BYPASS_DATA_MASK 0xFF + +/** + * omap_vc_init() - Initialization for Voltage controller + * @speed_khz: I2C buspeed in KHz + */ +void omap_vc_init(u16 speed_khz) +{ + u32 val; + u32 sys_clk_khz, cycles_hi, cycles_low; + + sys_clk_khz = get_sys_clk_freq() / 1000; + + if (speed_khz > 400) { + puts("higher speed requested - throttle to 400Khz\n"); + speed_khz = 400; + } + + /* + * Setup the dedicated I2C controller for Voltage Control + * I2C clk - high period 40% low period 60% + */ + speed_khz /= 10; + cycles_hi = sys_clk_khz * 4 / speed_khz; + cycles_low = sys_clk_khz * 6 / speed_khz; + /* values to be set in register - less by 5 & 7 respectively */ + cycles_hi -= 5; + cycles_low -= 7; + val = (cycles_hi << PRM_VC_CFG_I2C_CLK_SCLH_SHIFT) | + (cycles_low << PRM_VC_CFG_I2C_CLK_SCLL_SHIFT); + writel(val, &prcm->prm_vc_cfg_i2c_clk); + + val = CONFIG_OMAP_VC_I2C_HS_MCODE << + PRM_VC_CFG_I2C_MODE_HSMCODE_SHIFT; + /* No HS mode for now */ + val &= ~PRM_VC_CFG_I2C_MODE_HSMODEEN_BIT; + writel(val, &prcm->prm_vc_cfg_i2c_mode); +} + +/** + * omap_vc_bypass_send_value() - Send a data using VC Bypass command + * @sa: 7 bit I2C slave address of the PMIC + * @reg_addr: I2C register address(8 bit) address in PMIC + * @reg_data: what 8 bit data to write + */ +int omap_vc_bypass_send_value(u8 sa, u8 reg_addr, u8 reg_data) +{ + /* + * Unfortunately we need to loop here instead of a defined time + * use arbitary large value + */ + u32 timeout = 0xFFFF; + u32 reg_val; + + sa &= PRM_VC_VAL_BYPASS_SLAVEADDR_MASK; + reg_addr &= PRM_VC_VAL_BYPASS_REGADDR_MASK; + reg_data &= PRM_VC_VAL_BYPASS_DATA_MASK; + + /* program VC to send data */ + reg_val = sa << PRM_VC_VAL_BYPASS_SLAVEADDR_SHIFT | + reg_addr << PRM_VC_VAL_BYPASS_REGADDR_SHIFT | + reg_data << PRM_VC_VAL_BYPASS_DATA_SHIFT; + writel(reg_val, &prcm->prm_vc_val_bypass); + + /* Signal VC to send data */ + writel(reg_val | PRM_VC_VAL_BYPASS_VALID_BIT, &prcm->prm_vc_val_bypass); + + /* Wait on VC to complete transmission */ + do { + reg_val = readl(&prcm->prm_vc_val_bypass) & + PRM_VC_VAL_BYPASS_VALID_BIT; + if (!reg_val) + break; + + sdelay(100); + } while (--timeout); + + /* Optional: cleanup PRM_IRQSTATUS_Ax */ + /* In case we can do something about it in future.. */ + if (!timeout) + return -1; + + /* All good.. */ + return 0; +} diff --git a/arch/arm/cpu/armv7/omap4/clocks.c b/arch/arm/cpu/armv7/omap4/clocks.c index e2189f729f..976cfd55b8 100644 --- a/arch/arm/cpu/armv7/omap4/clocks.c +++ b/arch/arm/cpu/armv7/omap4/clocks.c @@ -275,7 +275,7 @@ void scale_vcores(void) { u32 volt, omap_rev; - setup_sri2c(); + omap_vc_init(PRM_VC_I2C_CHANNEL_FREQ_KHZ); omap_rev = omap_revision(); /* TPS - supplies vdd_mpu on 4460 */ diff --git a/arch/arm/cpu/armv7/omap5/clocks.c b/arch/arm/cpu/armv7/omap5/clocks.c index dd882a202e..0a614f0970 100644 --- a/arch/arm/cpu/armv7/omap5/clocks.c +++ b/arch/arm/cpu/armv7/omap5/clocks.c @@ -243,7 +243,7 @@ void scale_vcores(void) { u32 volt; - setup_sri2c(); + omap_vc_init(PRM_VC_I2C_CHANNEL_FREQ_KHZ); /* Enable 1.22V from TPS for vdd_mpu */ volt = 1220; |