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편집 파일: ti_am335x_tscadc.h

#ifndef __LINUX_TI_AM335X_TSCADC_MFD_H #define __LINUX_TI_AM335X_TSCADC_MFD_H /* * TI Touch Screen / ADC MFD driver * * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/ * * 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. * * 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 <linux/mfd/core.h> #define REG_RAWIRQSTATUS 0x024 #define REG_IRQSTATUS 0x028 #define REG_IRQENABLE 0x02C #define REG_IRQCLR 0x030 #define REG_IRQWAKEUP 0x034 #define REG_DMAENABLE_SET 0x038 #define REG_DMAENABLE_CLEAR 0x03c #define REG_CTRL 0x040 #define REG_ADCFSM 0x044 #define REG_CLKDIV 0x04C #define REG_SE 0x054 #define REG_IDLECONFIG 0x058 #define REG_CHARGECONFIG 0x05C #define REG_CHARGEDELAY 0x060 #define REG_STEPCONFIG(n) (0x64 + ((n) * 8)) #define REG_STEPDELAY(n) (0x68 + ((n) * 8)) #define REG_FIFO0CNT 0xE4 #define REG_FIFO0THR 0xE8 #define REG_FIFO1CNT 0xF0 #define REG_FIFO1THR 0xF4 #define REG_DMA1REQ 0xF8 #define REG_FIFO0 0x100 #define REG_FIFO1 0x200 /* Register Bitfields */ /* IRQ wakeup enable */ #define IRQWKUP_ENB BIT(0) /* Step Enable */ #define STEPENB_MASK (0x1FFFF << 0) #define STEPENB(val) ((val) << 0) #define ENB(val) (1 << (val)) #define STPENB_STEPENB STEPENB(0x1FFFF) #define STPENB_STEPENB_TC STEPENB(0x1FFF) /* IRQ enable */ #define IRQENB_HW_PEN BIT(0) #define IRQENB_EOS BIT(1) #define IRQENB_FIFO0THRES BIT(2) #define IRQENB_FIFO0OVRRUN BIT(3) #define IRQENB_FIFO0UNDRFLW BIT(4) #define IRQENB_FIFO1THRES BIT(5) #define IRQENB_FIFO1OVRRUN BIT(6) #define IRQENB_FIFO1UNDRFLW BIT(7) #define IRQENB_PENUP BIT(9) /* Step Configuration */ #define STEPCONFIG_MODE_MASK (3 << 0) #define STEPCONFIG_MODE(val) ((val) << 0) #define STEPCONFIG_MODE_SWCNT STEPCONFIG_MODE(1) #define STEPCONFIG_MODE_HWSYNC STEPCONFIG_MODE(2) #define STEPCONFIG_AVG_MASK (7 << 2) #define STEPCONFIG_AVG(val) ((val) << 2) #define STEPCONFIG_AVG_16 STEPCONFIG_AVG(4) #define STEPCONFIG_XPP BIT(5) #define STEPCONFIG_XNN BIT(6) #define STEPCONFIG_YPP BIT(7) #define STEPCONFIG_YNN BIT(8) #define STEPCONFIG_XNP BIT(9) #define STEPCONFIG_YPN BIT(10) #define STEPCONFIG_RFP(val) ((val) << 12) #define STEPCONFIG_RFP_VREFP (0x3 << 12) #define STEPCONFIG_INM_MASK (0xF << 15) #define STEPCONFIG_INM(val) ((val) << 15) #define STEPCONFIG_INM_ADCREFM STEPCONFIG_INM(8) #define STEPCONFIG_INP_MASK (0xF << 19) #define STEPCONFIG_INP(val) ((val) << 19) #define STEPCONFIG_INP_AN4 STEPCONFIG_INP(4) #define STEPCONFIG_INP_ADCREFM STEPCONFIG_INP(8) #define STEPCONFIG_FIFO1 BIT(26) #define STEPCONFIG_RFM(val) ((val) << 23) #define STEPCONFIG_RFM_VREFN (0x3 << 23) /* Delay register */ #define STEPDELAY_OPEN_MASK (0x3FFFF << 0) #define STEPDELAY_OPEN(val) ((val) << 0) #define STEPCONFIG_OPENDLY STEPDELAY_OPEN(0x098) #define STEPDELAY_SAMPLE_MASK (0xFF << 24) #define STEPDELAY_SAMPLE(val) ((val) << 24) #define STEPCONFIG_SAMPLEDLY STEPDELAY_SAMPLE(0) /* Charge Config */ #define STEPCHARGE_RFP_MASK (7 << 12) #define STEPCHARGE_RFP(val) ((val) << 12) #define STEPCHARGE_RFP_XPUL STEPCHARGE_RFP(1) #define STEPCHARGE_INM_MASK (0xF << 15) #define STEPCHARGE_INM(val) ((val) << 15) #define STEPCHARGE_INM_AN1 STEPCHARGE_INM(1) #define STEPCHARGE_INP_MASK (0xF << 19) #define STEPCHARGE_INP(val) ((val) << 19) #define STEPCHARGE_RFM_MASK (3 << 23) #define STEPCHARGE_RFM(val) ((val) << 23) #define STEPCHARGE_RFM_XNUR STEPCHARGE_RFM(1) /* Charge delay */ #define CHARGEDLY_OPEN_MASK (0x3FFFF << 0) #define CHARGEDLY_OPEN(val) ((val) << 0) #define CHARGEDLY_OPENDLY CHARGEDLY_OPEN(0x400) /* Control register */ #define CNTRLREG_TSCSSENB BIT(0) #define CNTRLREG_STEPID BIT(1) #define CNTRLREG_STEPCONFIGWRT BIT(2) #define CNTRLREG_POWERDOWN BIT(4) #define CNTRLREG_AFE_CTRL_MASK (3 << 5) #define CNTRLREG_AFE_CTRL(val) ((val) << 5) #define CNTRLREG_4WIRE CNTRLREG_AFE_CTRL(1) #define CNTRLREG_5WIRE CNTRLREG_AFE_CTRL(2) #define CNTRLREG_8WIRE CNTRLREG_AFE_CTRL(3) #define CNTRLREG_TSCENB BIT(7) /* FIFO READ Register */ #define FIFOREAD_DATA_MASK (0xfff << 0) #define FIFOREAD_CHNLID_MASK (0xf << 16) /* DMA ENABLE/CLEAR Register */ #define DMA_FIFO0 BIT(0) #define DMA_FIFO1 BIT(1) /* Sequencer Status */ #define SEQ_STATUS BIT(5) #define CHARGE_STEP 0x11 #define ADC_CLK 3000000 #define TOTAL_STEPS 16 #define TOTAL_CHANNELS 8 #define FIFO1_THRESHOLD 19 /* * time in us for processing a single channel, calculated as follows: * * max num cycles = open delay + (sample delay + conv time) * averaging * * max num cycles: 262143 + (255 + 13) * 16 = 266431 * * clock frequency: 26MHz / 8 = 3.25MHz * clock period: 1 / 3.25MHz = 308ns * * max processing time: 266431 * 308ns = 83ms(approx) */ #define IDLE_TIMEOUT 83 /* milliseconds */ #define TSCADC_CELLS 2 struct ti_tscadc_dev { struct device *dev; struct regmap *regmap; void __iomem *tscadc_base; phys_addr_t tscadc_phys_base; int irq; int used_cells; /* 1-2 */ int tsc_wires; int tsc_cell; /* -1 if not used */ int adc_cell; /* -1 if not used */ struct mfd_cell cells[TSCADC_CELLS]; u32 reg_se_cache; bool adc_waiting; bool adc_in_use; wait_queue_head_t reg_se_wait; spinlock_t reg_lock; unsigned int clk_div; /* tsc device */ struct titsc *tsc; /* adc device */ struct adc_device *adc; }; static inline struct ti_tscadc_dev *ti_tscadc_dev_get(struct platform_device *p) { struct ti_tscadc_dev **tscadc_dev = p->dev.platform_data; return *tscadc_dev; } void am335x_tsc_se_set_cache(struct ti_tscadc_dev *tsadc, u32 val); void am335x_tsc_se_set_once(struct ti_tscadc_dev *tsadc, u32 val); void am335x_tsc_se_clr(struct ti_tscadc_dev *tsadc, u32 val); void am335x_tsc_se_adc_done(struct ti_tscadc_dev *tsadc); #endif