1 #ifndef __LINUX_TI_AM335X_TSCADC_MFD_H
2 #define __LINUX_TI_AM335X_TSCADC_MFD_H
5 * TI Touch Screen / ADC MFD driver
7 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation version 2.
13 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
14 * kind, whether express or implied; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
19 #include <linux/mfd/core.h>
21 #define REG_RAWIRQSTATUS 0x024
22 #define REG_IRQSTATUS 0x028
23 #define REG_IRQENABLE 0x02C
24 #define REG_IRQCLR 0x030
25 #define REG_IRQWAKEUP 0x034
26 #define REG_CTRL 0x040
27 #define REG_ADCFSM 0x044
28 #define REG_CLKDIV 0x04C
30 #define REG_IDLECONFIG 0x058
31 #define REG_CHARGECONFIG 0x05C
32 #define REG_CHARGEDELAY 0x060
33 #define REG_STEPCONFIG(n) (0x64 + ((n) * 8))
34 #define REG_STEPDELAY(n) (0x68 + ((n) * 8))
35 #define REG_FIFO0CNT 0xE4
36 #define REG_FIFO0THR 0xE8
37 #define REG_FIFO1CNT 0xF0
38 #define REG_FIFO1THR 0xF4
39 #define REG_FIFO0 0x100
40 #define REG_FIFO1 0x200
42 /* Register Bitfields */
43 /* IRQ wakeup enable */
44 #define IRQWKUP_ENB BIT(0)
47 #define STEPENB_MASK (0x1FFFF << 0)
48 #define STEPENB(val) ((val) << 0)
51 #define IRQENB_HW_PEN BIT(0)
52 #define IRQENB_FIFO0THRES BIT(2)
53 #define IRQENB_FIFO1THRES BIT(5)
54 #define IRQENB_PENUP BIT(9)
56 /* Step Configuration */
57 #define STEPCONFIG_MODE_MASK (3 << 0)
58 #define STEPCONFIG_MODE(val) ((val) << 0)
59 #define STEPCONFIG_MODE_HWSYNC STEPCONFIG_MODE(2)
60 #define STEPCONFIG_AVG_MASK (7 << 2)
61 #define STEPCONFIG_AVG(val) ((val) << 2)
62 #define STEPCONFIG_AVG_16 STEPCONFIG_AVG(4)
63 #define STEPCONFIG_XPP BIT(5)
64 #define STEPCONFIG_XNN BIT(6)
65 #define STEPCONFIG_YPP BIT(7)
66 #define STEPCONFIG_YNN BIT(8)
67 #define STEPCONFIG_XNP BIT(9)
68 #define STEPCONFIG_YPN BIT(10)
69 #define STEPCONFIG_INM_MASK (0xF << 15)
70 #define STEPCONFIG_INM(val) ((val) << 15)
71 #define STEPCONFIG_INM_ADCREFM STEPCONFIG_INM(8)
72 #define STEPCONFIG_INP_MASK (0xF << 19)
73 #define STEPCONFIG_INP(val) ((val) << 19)
74 #define STEPCONFIG_INP_AN4 STEPCONFIG_INP(4)
75 #define STEPCONFIG_INP_ADCREFM STEPCONFIG_INP(8)
76 #define STEPCONFIG_FIFO1 BIT(26)
79 #define STEPDELAY_OPEN_MASK (0x3FFFF << 0)
80 #define STEPDELAY_OPEN(val) ((val) << 0)
81 #define STEPCONFIG_OPENDLY STEPDELAY_OPEN(0x098)
82 #define STEPDELAY_SAMPLE_MASK (0xFF << 24)
83 #define STEPDELAY_SAMPLE(val) ((val) << 24)
84 #define STEPCONFIG_SAMPLEDLY STEPDELAY_SAMPLE(0)
87 #define STEPCHARGE_RFP_MASK (7 << 12)
88 #define STEPCHARGE_RFP(val) ((val) << 12)
89 #define STEPCHARGE_RFP_XPUL STEPCHARGE_RFP(1)
90 #define STEPCHARGE_INM_MASK (0xF << 15)
91 #define STEPCHARGE_INM(val) ((val) << 15)
92 #define STEPCHARGE_INM_AN1 STEPCHARGE_INM(1)
93 #define STEPCHARGE_INP_MASK (0xF << 19)
94 #define STEPCHARGE_INP(val) ((val) << 19)
95 #define STEPCHARGE_RFM_MASK (3 << 23)
96 #define STEPCHARGE_RFM(val) ((val) << 23)
97 #define STEPCHARGE_RFM_XNUR STEPCHARGE_RFM(1)
100 #define CHARGEDLY_OPEN_MASK (0x3FFFF << 0)
101 #define CHARGEDLY_OPEN(val) ((val) << 0)
102 #define CHARGEDLY_OPENDLY CHARGEDLY_OPEN(1)
104 /* Control register */
105 #define CNTRLREG_TSCSSENB BIT(0)
106 #define CNTRLREG_STEPID BIT(1)
107 #define CNTRLREG_STEPCONFIGWRT BIT(2)
108 #define CNTRLREG_POWERDOWN BIT(4)
109 #define CNTRLREG_AFE_CTRL_MASK (3 << 5)
110 #define CNTRLREG_AFE_CTRL(val) ((val) << 5)
111 #define CNTRLREG_4WIRE CNTRLREG_AFE_CTRL(1)
112 #define CNTRLREG_5WIRE CNTRLREG_AFE_CTRL(2)
113 #define CNTRLREG_8WIRE CNTRLREG_AFE_CTRL(3)
114 #define CNTRLREG_TSCENB BIT(7)
116 /* FIFO READ Register */
117 #define FIFOREAD_DATA_MASK (0xfff << 0)
118 #define FIFOREAD_CHNLID_MASK (0xf << 16)
120 /* Sequencer Status */
121 #define SEQ_STATUS BIT(5)
123 #define ADC_CLK 3000000
124 #define MAX_CLK_DIV 7
125 #define TOTAL_STEPS 16
126 #define TOTAL_CHANNELS 8
129 * ADC runs at 3MHz, and it takes
130 * 15 cycles to latch one data output.
131 * Hence the idle time for ADC to
132 * process one sample data would be
133 * around 5 micro seconds.
135 #define IDLE_TIMEOUT 5 /* microsec */
137 #define TSCADC_CELLS 2
139 struct ti_tscadc_dev {
141 struct regmap *regmap_tscadc;
142 void __iomem *tscadc_base;
144 int used_cells; /* 1-2 */
145 int tsc_cell; /* -1 if not used */
146 int adc_cell; /* -1 if not used */
147 struct mfd_cell cells[TSCADC_CELLS];
155 struct adc_device *adc;
158 static inline struct ti_tscadc_dev *ti_tscadc_dev_get(struct platform_device *p)
160 struct ti_tscadc_dev **tscadc_dev = p->dev.platform_data;
165 void am335x_tsc_se_update(struct ti_tscadc_dev *tsadc);
166 void am335x_tsc_se_set(struct ti_tscadc_dev *tsadc, u32 val);
167 void am335x_tsc_se_clr(struct ti_tscadc_dev *tsadc, u32 val);