diff options
Diffstat (limited to 'src/mainboard/google/gru')
| -rw-r--r-- | src/mainboard/google/gru/Makefile.inc | 3 | ||||
| -rw-r--r-- | src/mainboard/google/gru/bootblock.c | 17 | ||||
| -rw-r--r-- | src/mainboard/google/gru/pwm_regulator.c | 82 | ||||
| -rw-r--r-- | src/mainboard/google/gru/pwm_regulator.h | 28 | ||||
| -rw-r--r-- | src/mainboard/google/gru/romstage.c | 72 |
5 files changed, 134 insertions, 68 deletions
diff --git a/src/mainboard/google/gru/Makefile.inc b/src/mainboard/google/gru/Makefile.inc index e1ba56a2f1..9e07a6c13a 100644 --- a/src/mainboard/google/gru/Makefile.inc +++ b/src/mainboard/google/gru/Makefile.inc @@ -18,6 +18,8 @@ subdirs-y += sdram_params/ bootblock-y += bootblock.c bootblock-y += chromeos.c bootblock-y += memlayout.ld +bootblock-y += pwm_regulator.c +bootblock-y += boardid.c verstage-y += chromeos.c verstage-y += memlayout.ld @@ -26,6 +28,7 @@ verstage-y += reset.c romstage-y += boardid.c romstage-y += chromeos.c romstage-y += memlayout.ld +romstage-y += pwm_regulator.c romstage-y += romstage.c romstage-y += sdram_configs.c diff --git a/src/mainboard/google/gru/bootblock.c b/src/mainboard/google/gru/bootblock.c index e80f4a3dd1..ff91e1a971 100644 --- a/src/mainboard/google/gru/bootblock.c +++ b/src/mainboard/google/gru/bootblock.c @@ -16,13 +16,17 @@ #include <arch/io.h> #include <bootblock_common.h> +#include <console/console.h> +#include <delay.h> #include <soc/grf.h> #include <gpio.h> +#include <soc/clock.h> #include <soc/i2c.h> +#include <soc/pwm.h> #include <soc/spi.h> -#include <console/console.h> #include "board.h" +#include "pwm_regulator.h" void bootblock_mainboard_early_init(void) { @@ -58,8 +62,19 @@ void bootblock_mainboard_early_init(void) #endif } +static void speed_up_boot_cpu(void) +{ + pwm_regulator_configure(PWM_REGULATOR_LIT, 1200); + + udelay(200); + + rkclk_configure_cpu(APLL_1512_MHZ, false); +} + void bootblock_mainboard_init(void) { + speed_up_boot_cpu(); + /* Set pinmux and configure spi flashrom. */ write32(&rk3399_pmugrf->spi1_rxd, IOMUX_SPI1_RX); write32(&rk3399_pmugrf->spi1_csclktx, IOMUX_SPI1_CSCLKTX); diff --git a/src/mainboard/google/gru/pwm_regulator.c b/src/mainboard/google/gru/pwm_regulator.c new file mode 100644 index 0000000000..f382b2b58c --- /dev/null +++ b/src/mainboard/google/gru/pwm_regulator.c @@ -0,0 +1,82 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2016 Rockchip Inc. + * + * 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; version 2 of the License. + * + * 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. + */ + +#include <arch/io.h> +#include <assert.h> +#include <boardid.h> +#include <console/console.h> +#include <soc/grf.h> +#include <soc/pwm.h> + +#include "pwm_regulator.h" + +/* + * Apparently a period of 3333 is determined by EEs to be ideal for our + * board design / resistors / capacitors / regulators but due to + * clock dividers we actually get 3337. + */ +#define PWM_PERIOD 3337 +#define PWM_DESIGN_VOLTAGE_MIN 8000 +#define PWM_DESIGN_VOLTAGE_MAX 15000 + +/* The min & max design voltages are different after kevin-r6 */ +int kevin_voltage_min_max_r6[][2] = { + [PWM_REGULATOR_GPU] = {7910, 12139}, + [PWM_REGULATOR_BIG] = {7986, 13057}, + [PWM_REGULATOR_LIT] = {7997, 13002}, + [PWM_REGULATOR_CENTERLOG] = {7996, 10507} +}; + +void pwm_regulator_configure(enum pwm_regulator pwm, int millivolt) +{ + int duty_ns, voltage_max, voltage_min; + int voltage = millivolt * 10; /* for higer calculation accuracy */ + + switch (pwm) { + case PWM_REGULATOR_GPU: + write32(&rk3399_grf->iomux_pwm_0, IOMUX_PWM_0); + break; + case PWM_REGULATOR_BIG: + write32(&rk3399_grf->iomux_pwm_1, IOMUX_PWM_1); + break; + case PWM_REGULATOR_LIT: + write32(&rk3399_pmugrf->iomux_pwm_2, IOMUX_PWM_2); + break; + case PWM_REGULATOR_CENTERLOG: + write32(&rk3399_pmugrf->iomux_pwm_3a, IOMUX_PWM_3_A); + break; + } + + voltage_min = PWM_DESIGN_VOLTAGE_MIN; + voltage_max = PWM_DESIGN_VOLTAGE_MAX; + if (IS_ENABLED(CONFIG_BOARD_GOOGLE_KEVIN) && board_id() >= 6) { + voltage_min = kevin_voltage_min_max_r6[pwm][0]; + voltage_max = kevin_voltage_min_max_r6[pwm][1]; + } + + assert(voltage <= voltage_max && voltage >= voltage_min); + + /* + * Intentionally round down (higher volt) to be safe. + * eg, for the default min & max design voltage: + * period = 3337, volt = 1.1: 1906 + * period = 3337, volt = 1.0: 2383 + * period = 3337, volt = 0.9: 2860 + */ + duty_ns = PWM_PERIOD * (voltage_max - voltage) + / (voltage_max - voltage_min); + + pwm_init(pwm, PWM_PERIOD, duty_ns); +} diff --git a/src/mainboard/google/gru/pwm_regulator.h b/src/mainboard/google/gru/pwm_regulator.h new file mode 100644 index 0000000000..6ef0c59331 --- /dev/null +++ b/src/mainboard/google/gru/pwm_regulator.h @@ -0,0 +1,28 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2016 Rockchip Inc. + * + * 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; version 2 of the License. + * + * 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. + */ + +#ifndef __COREBOOT_SRC_MAINBOARD_GOOGLE_GRU_PWM_REGULATOR_H +#define __COREBOOT_SRC_MAINBOARD_GOOGLE_GRU_PWM_REGULATOR_H + +enum pwm_regulator { + PWM_REGULATOR_GPU = 0, + PWM_REGULATOR_BIG, + PWM_REGULATOR_LIT, + PWM_REGULATOR_CENTERLOG +}; + +void pwm_regulator_configure(enum pwm_regulator pwm, int millivolt); + +#endif /* ! __COREBOOT_SRC_MAINBOARD_GOOGLE_GRU_PWM_REGULATOR_H */ diff --git a/src/mainboard/google/gru/romstage.c b/src/mainboard/google/gru/romstage.c index ccf42b9b5f..1e2507a29e 100644 --- a/src/mainboard/google/gru/romstage.c +++ b/src/mainboard/google/gru/romstage.c @@ -17,90 +17,28 @@ #include <arch/cache.h> #include <arch/cpu.h> #include <arch/exception.h> -#include <arch/io.h> #include <arch/mmu.h> -#include <boardid.h> #include <cbfs.h> #include <console/console.h> -#include <delay.h> #include <program_loading.h> #include <romstage_handoff.h> #include <soc/addressmap.h> -#include <soc/grf.h> #include <soc/mmu_operations.h> -#include <soc/pwm.h> #include <soc/tsadc.h> #include <soc/sdram.h> #include <symbols.h> #include <soc/usb.h> +#include "pwm_regulator.h" + static const uint64_t dram_size = (uint64_t)min((uint64_t)CONFIG_DRAM_SIZE_MB * MiB, MAX_DRAM_ADDRESS); static void init_dvs_outputs(void) { - int duty_ns; - uint32_t i; - uint32_t id; - - write32(&rk3399_grf->iomux_pwm_0, IOMUX_PWM_0); /* GPU */ - write32(&rk3399_grf->iomux_pwm_1, IOMUX_PWM_1); /* Big */ - write32(&rk3399_pmugrf->iomux_pwm_2, IOMUX_PWM_2); /* Little */ - write32(&rk3399_pmugrf->iomux_pwm_3a, IOMUX_PWM_3_A); /* Centerlog */ - - /* - * Set up voltages for all DVS rails. - * - * LITTLE CPU: At the speed we're running at right now and on the - * early silicon, .9V is sane. If/when we run faster, let's bump this. - * - * CENTER LOGIC: There are some claims that this should simply always - * be .9 V. There are other claims that say that we need to adjust this - * dynamically depending on the memory frequency. Until this is sorted - * out, it appears that .9 V works for the 800 MHz. - * - * BIG CPU / GPU: These aren't used in coreboot. Init to .9V which is - * supposed to be a good default. - * - * Details: - * design_min = 0.8 - * design_max = 1.5 - * period = 3337 # 300 kHz - * volt = 1.1 - * # Intentionally round down (higher volt) to be safe. - * int((period / (design_max - design_min)) * (design_max - volt)) - * - * Apparently a period of 3333 is determined by EEs to be ideal for our - * board design / resistors / capacitors / regulators but due to - * clock dividers we actually get 3337. Solving, we get: - * period = 3337, volt = 1.1: 1906 - * period = 3337, volt = 1.0: 2383 - * period = 3337, volt = 0.9: 2860 - */ - duty_ns = 2860; /* 0.9v */ - - /* TODO: Clean all this up, implement proper pwm_regulator driver. */ - if (IS_ENABLED(CONFIG_BOARD_GOOGLE_KEVIN)) { - id = board_id(); - if (id <= 2) - duty_ns = 1906; /* 1.1v */ - else if (id == 3) - duty_ns = 2621; /* 0.95v */ - else if (id >= 6) { - /* GPU: 3337 * (12043 - 9000) / (12043 - 7984) = 2501 */ - pwm_init(0, 3337, 2501); - /* BIG: 3337 * (12837 - 9000) / (12837 - 7985) = 2638 */ - pwm_init(1, 3337, 2638); - /* LIT: 3337 * (12807 - 9000) / (12807 - 8009) = 2647 */ - pwm_init(2, 3337, 2647); - /* CTR: 3337 * (10507 - 9500) / (10507 - 7996) = 1338 */ - pwm_init(3, 3337, 1338); - return; - } - } - - for (i = 0; i < 4; i++) - pwm_init(i, 3337, duty_ns); + pwm_regulator_configure(PWM_REGULATOR_GPU, 900); + pwm_regulator_configure(PWM_REGULATOR_BIG, 900); + pwm_regulator_configure(PWM_REGULATOR_CENTERLOG, 950); } static void prepare_usb(void) |