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https://github.com/Rockbox/rockbox.git
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3c2b6809d9
Speachy suggested we don't shut down the adc on ROLO this fixes the random adc drop out on ROLO Change-Id: Ife7d679ce51a6f767963210ee650815f1de12223
307 lines
8.1 KiB
C
307 lines
8.1 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2016 by Roman Stolyarov
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* Copyright (C) 2020 by William Wilgus
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "system.h"
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#include "cpu.h"
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#include "button.h"
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#include "button-target.h"
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#include "powermgmt.h"
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#include "kernel.h"
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#include "backlight.h"
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#include "logf.h"
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#include "adc.h"
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#define BATT_WAIT_TIME HZ * 30
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#define PIN_BTN_POWER (32*0+30)
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#define PIN_BTN_HOLD (32*1+15)
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#define PIN_KEY_INT (32*4+13)
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#define KEY_INT_IRQ GPIO141
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#define PIN_COM_BOP (32*3+17) /* common pin for Back Option Play */
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#define PIN_CHARGE_CON (32*1+7)
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#define PIN_PH_DECT (32*1+11)
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#define IRQ_PH_DECT GPIO_IRQ(PIN_PH_DECT)
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#define GPIO_PH_DECT GPIO43
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#define PIN_LO_DECT (32*1+12)
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#define IRQ_LO_DECT GPIO_IRQ(PIN_LO_DECT)
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#define GPIO_LO_DECT GPIO44
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#define KEY_IS_DOWN(pin) (__gpio_get_pin(pin) == 0)
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#define ADC_MASK 0x0FFF
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static volatile unsigned short bat_val, key_val;
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static volatile int btn_last = BUTTON_NONE;
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static volatile long btn_last_tick;
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bool headphones_inserted(void)
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{
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return (__gpio_get_pin(PIN_PH_DECT) != 0);
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}
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bool lineout_inserted(void)
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{
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/* We want to prevent LO being "enabled" if HP is attached
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to avoid potential eardrum damage */
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return (__gpio_get_pin(PIN_LO_DECT) == 0) && !headphones_inserted();
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}
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void button_init_device(void)
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{
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key_val = ADC_MASK;
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__gpio_as_input(PIN_BTN_POWER);
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__gpio_as_input(PIN_BTN_HOLD);
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__gpio_disable_pull(PIN_BTN_POWER);
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__gpio_disable_pull(PIN_BTN_HOLD);
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__gpio_as_irq_fall_edge(PIN_KEY_INT);
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__gpio_disable_pull(PIN_KEY_INT);
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system_enable_irq(GPIO_IRQ(PIN_KEY_INT));
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__gpio_set_pin(PIN_CHARGE_CON); /* 0.7 A */
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__gpio_as_output(PIN_CHARGE_CON);
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__gpio_as_input(PIN_PH_DECT);
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/*__gpio_disable_pull(PIN_PH_DECT); // Spurious Detections */
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__gpio_as_input(PIN_LO_DECT);
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__gpio_disable_pull(PIN_LO_DECT);
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}
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bool button_hold(void)
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{
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bool hold_button = __gpio_get_pin(PIN_BTN_HOLD) == 1;
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#ifndef BOOTLOADER
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static bool hold_button_old = false;
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if (hold_button != hold_button_old)
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{
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hold_button_old = hold_button;
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backlight_hold_changed(hold_button);
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}
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#endif
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return hold_button;
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}
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/* NOTE: Due to how this is wired, button combinations are not allowed
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* unless one of the two buttons is the POWER
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*
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* Note --Update 2020
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* by toggling BOP common I was able to remove BACK, OPTION, PLAY from the
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* loop selectively and test which keys were pressed but this took two adc rounds
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* and proved to be minimally useful for the added overhead
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*
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* NOW multiple button presses are emulated but button priority needs to be taken
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* into consideration; higher priority keys 'overide' the lower priority keys
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* VOLUP[7] VOLDN[6] PREV[5] NEXT[4] PLAY[3] OPTION[2] HOME[1]
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*/
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int button_read_device(void)
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{
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unsigned short key;
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int btn = BUTTON_NONE;
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int btn_pwr = BUTTON_NONE;
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if (button_hold())
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return BUTTON_NONE;
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if (KEY_IS_DOWN(PIN_BTN_POWER))
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btn_pwr = BUTTON_POWER;
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if (!KEY_IS_DOWN(PIN_KEY_INT))
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{
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__intc_mask_irq(IRQ_SADC);
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REG_SADC_ADENA &= ~ADENA_AUXEN;
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return btn_pwr;
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}
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key = (key_val & ADC_MASK);
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/* Don't initiate a new request if we have one pending */
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if(!(REG_SADC_ADENA & (ADENA_AUXEN)))
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{
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REG_SADC_ADENA |= ADENA_AUXEN;
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}
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if (key < 261)
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btn = BUTTON_VOL_UP;
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else
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if (key < 653)
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btn = BUTTON_VOL_DOWN;
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else
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if (key < 1101)
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btn = BUTTON_PREV;
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else
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if (key < 1498)
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btn = BUTTON_NEXT;
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else
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if (key < 1839)
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btn = BUTTON_PLAY;
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else
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if (key < 2213)
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btn = BUTTON_OPTION;
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else
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if (key < 2600)
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btn = BUTTON_HOME;
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if (btn_last == BUTTON_NONE && TIME_AFTER(current_tick, btn_last_tick + HZ/20))
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btn_last = btn;
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if (btn_pwr != BUTTON_NONE)
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btn |= BUTTON_PWRALT;
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return btn | btn_last;
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}
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/* called on button press interrupt */
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void KEY_INT_IRQ(void)
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{
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btn_last = BUTTON_NONE;
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key_val = ADC_MASK;
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__intc_unmask_irq(IRQ_SADC);
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REG_SADC_ADENA |= ADENA_AUXEN;
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btn_last_tick = current_tick;
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}
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/* Notes on batteries
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xDuoo shipped two types of batteries:
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First is the 2000mAh battery shipped in newer units
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Second is the 1500mAh battery shipped in older units
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*/
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const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
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{
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/* 5% */
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3414, 3634
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};
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const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
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{
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/* 0% */
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3307, 3307
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};
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/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
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const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
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{
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{ 3307, 3459, 3530, 3575, 3608, 3648, 3723, 3819, 3918, 4022, 4162 },
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{ 3300, 3652, 3704, 3730, 3753, 3786, 3836, 3906, 3973, 4061, 4160 }
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};
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#if CONFIG_CHARGING
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/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
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const unsigned short percent_to_volt_charge[11] =
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// { 3300, 3652, 3704, 3730, 3753, 3786, 3836, 3906, 3973, 4061, 4160 };
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{ 3444, 3827, 3893, 3909, 3931, 4001, 4067, 4150, 4206, 4207, 4208 };
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#endif /* CONFIG_CHARGING */
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/* VBAT = (BDATA/1024) * 2.5V */
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#define BATTERY_SCALE_FACTOR 2460
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/* Returns battery voltage from ADC [millivolts] */
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int _battery_voltage(void)
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{
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static long last_tick = 0;
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if (TIME_AFTER(current_tick, last_tick) && REG_SADC_ADENA == 0)
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{
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last_tick = current_tick;
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__intc_mask_irq(IRQ_SADC);
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REG_SADC_ADENA |= ADENA_VBATEN;
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/* poll for value from our context instead of ISR */
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while (!(REG_SADC_ADSTATE & ADCTRL_VRDYM) &&
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TIME_BEFORE(current_tick, last_tick + HZ / 20))
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;;
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if ((REG_SADC_ADSTATE & ADCTRL_VRDYM))
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{
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last_tick += BATT_WAIT_TIME;
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bat_val = REG_SADC_ADVDAT;
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REG_SADC_ADSTATE &= ADCTRL_VRDYM; /* clear ready bit by writing 1*/
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}
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__intc_unmask_irq(IRQ_SADC);
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}
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return (bat_val*BATTERY_SCALE_FACTOR)>>10;
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}
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/* 12MHz XTAL
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/61 = 196 MHz base clock (max is 200, err on the side of safety)
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/(1+1) = 98.4KHz "us_clk (ie ~10us/tick)
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/(199+1) = 983.6KHz "ms_clk" (ie ~1ms/tick)
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*/
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void adc_init(void)
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{
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bat_val = ADC_MASK;
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/* don't re-init*/
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if (!(REG_CPM_CLKGR0 & CLKGR0_SADC) && !(REG_SADC_ADENA & ADENA_POWER))
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{
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system_enable_irq(IRQ_SADC);
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return;
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}
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__cpm_start_sadc();
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mdelay(20);
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REG_SADC_ADENA = 0; /* Power Up */
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mdelay(70);
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REG_SADC_ADSTATE = 0;
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REG_SADC_ADCTRL = ADCTRL_MASK_ALL - ADCTRL_ARDYM - ADCTRL_VRDYM;
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REG_SADC_ADCFG = ADCFG_VBAT_SEL | ADCFG_CMD_AUX(1); /* VBAT_SEL is undocumented but required! */
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REG_SADC_ADCLK = (199 << 16) | (1 << 8) | 61;
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system_enable_irq(IRQ_SADC);
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REG_SADC_ADENA |= ADENA_AUXEN | ADENA_VBATEN;
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}
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void adc_close(void)
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{
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REG_SADC_ADENA = ADENA_POWER; /* Power Down */
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__intc_mask_irq(IRQ_SADC);
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mdelay(20);
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__cpm_stop_sadc();
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}
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/* Interrupt handler */
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void SADC(void)
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{
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unsigned char state;
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unsigned char sadcstate;
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sadcstate = REG_SADC_ADSTATE;
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state = REG_SADC_ADSTATE & (~REG_SADC_ADCTRL);
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REG_SADC_ADSTATE &= sadcstate;
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if(state & ADCTRL_ARDYM)
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{
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key_val = REG_SADC_ADADAT;
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}
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else if(UNLIKELY(state & ADCTRL_VRDYM))
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{
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bat_val = REG_SADC_ADVDAT;
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}
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}
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