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/*
* This file is part of the coreboot project.
*
* Copyright 2014 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <arch/io.h>
#include <assert.h>
#include <console/console.h>
#include <delay.h>
#include <soc/clock.h>
#include <soc/grf.h>
#include <soc/pmu.h>
#include <soc/tsadc.h>
#include <stdint.h>
#include <stdlib.h>
struct rk3288_tsadc_regs {
u32 user_con;
u32 auto_con;
u32 int_en;
u32 int_pd;
u32 reserved0[(0x20 - 0x10) / 4];
u32 data0;
u32 data1;
u32 data2;
u32 data3;
u32 comp0_int;
u32 comp1_int;
u32 comp2_int;
u32 comp3_int;
u32 comp0_shut;
u32 comp1_shut;
u32 comp2_shut;
u32 comp3_shut;
u32 reserved1[(0x60 - 0x50) / 4];
u32 hight_int_debounce;
u32 hight_tshut_debounce;
u32 auto_period;
u32 auto_period_ht;
};
check_member(rk3288_tsadc_regs, auto_period_ht, 0x6c);
/* auto_con */
#define LAST_TSHUT (1 << 24)
#define TSHUT_POL_HIGH (1 << 8)
#define SRC3_EN (1 << 7)
#define SRC2_EN (1 << 6)
#define SRC1_EN (1 << 5)
#define SRC0_EN (1 << 4)
#define AUTO_EN (1 << 0)
/* int_en */
#define TSHUT_CRU_EN_SRC3 (1 << 11)
#define TSHUT_CRU_EN_SRC2 (1 << 10)
#define TSHUT_CRU_EN_SRC1 (1 << 9)
#define TSHUT_CRU_EN_SRC0 (1 << 8)
#define TSHUT_GPIO_EN_SRC3 (1 << 7)
#define TSHUT_GPIO_EN_SRC2 (1 << 6)
#define TSHUT_GPIO_EN_SRC1 (1 << 5)
#define TSHUT_GPIO_EN_SRC0 (1 << 4)
#define AUTO_PERIOD 10
#define AUTO_DEBOUNCE 4
#define AUTO_PERIOD_HT 10
#define AUTO_DEBOUNCE_HT 4
#define TSADC_CLOCK_HZ (8 * KHz)
/* AD value, correspond to 120 degrees Celsius */
#define TSADC_SHUT_VALUE 3437
struct rk3288_tsadc_regs *rk3288_tsadc = (void *)TSADC_BASE;
void tsadc_init(void)
{
rkclk_configure_tsadc(TSADC_CLOCK_HZ);
setbits_le32(&rk3288_tsadc->auto_con, LAST_TSHUT);
setbits_le32(&rk3288_tsadc->int_en,
TSHUT_CRU_EN_SRC2 | TSHUT_CRU_EN_SRC1 |
TSHUT_GPIO_EN_SRC2 | TSHUT_GPIO_EN_SRC1);
write32(&rk3288_tsadc->auto_period, AUTO_PERIOD);
write32(&rk3288_tsadc->hight_int_debounce, AUTO_DEBOUNCE);
write32(&rk3288_tsadc->auto_period_ht, AUTO_PERIOD_HT);
write32(&rk3288_tsadc->hight_tshut_debounce, AUTO_DEBOUNCE_HT);
write32(&rk3288_tsadc->comp1_shut, TSADC_SHUT_VALUE);
write32(&rk3288_tsadc->comp2_shut, TSADC_SHUT_VALUE);
/* polarity set to high,channel1 for cpu,channel2 for gpu */
setbits_le32(&rk3288_tsadc->auto_con, TSHUT_POL_HIGH | SRC2_EN |
SRC1_EN | AUTO_EN);
/*
tsadc iomux must be set after the tshut polarity setting,
since the tshut polarity defalut low active,
so if you enable tsadc iomux,it will output high
*/
setbits_le32(&rk3288_pmu->iomux_tsadc_int, IOMUX_TSADC_INT);
}
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