| /* |
| * 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. |
| */ |
| |
| #include <device/mmio.h> |
| #include <assert.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); |
| } |