1 /* 2 * Xilinx XADC driver 3 * 4 * Copyright 2013 Analog Devices Inc. 5 * Author: Lars-Peter Clauen <lars@metafoo.de> 6 * 7 * Licensed under the GPL-2. 8 */ 9 10 #ifndef __IIO_XILINX_XADC__ 11 #define __IIO_XILINX_XADC__ 12 13 #include <linux/interrupt.h> 14 #include <linux/mutex.h> 15 #include <linux/spinlock.h> 16 17 struct iio_dev; 18 struct clk; 19 struct xadc_ops; 20 struct platform_device; 21 22 void xadc_handle_events(struct iio_dev *indio_dev, unsigned long events); 23 24 int xadc_read_event_config(struct iio_dev *indio_dev, 25 const struct iio_chan_spec *chan, enum iio_event_type type, 26 enum iio_event_direction dir); 27 int xadc_write_event_config(struct iio_dev *indio_dev, 28 const struct iio_chan_spec *chan, enum iio_event_type type, 29 enum iio_event_direction dir, int state); 30 int xadc_read_event_value(struct iio_dev *indio_dev, 31 const struct iio_chan_spec *chan, enum iio_event_type type, 32 enum iio_event_direction dir, enum iio_event_info info, 33 int *val, int *val2); 34 int xadc_write_event_value(struct iio_dev *indio_dev, 35 const struct iio_chan_spec *chan, enum iio_event_type type, 36 enum iio_event_direction dir, enum iio_event_info info, 37 int val, int val2); 38 39 enum xadc_external_mux_mode { 40 XADC_EXTERNAL_MUX_NONE, 41 XADC_EXTERNAL_MUX_SINGLE, 42 XADC_EXTERNAL_MUX_DUAL, 43 }; 44 45 struct xadc { 46 void __iomem *base; 47 struct clk *clk; 48 49 const struct xadc_ops *ops; 50 51 uint16_t threshold[16]; 52 uint16_t temp_hysteresis; 53 unsigned int alarm_mask; 54 55 uint16_t *data; 56 57 struct iio_trigger *trigger; 58 struct iio_trigger *convst_trigger; 59 struct iio_trigger *samplerate_trigger; 60 61 enum xadc_external_mux_mode external_mux_mode; 62 63 unsigned int zynq_alarm; 64 unsigned int zynq_masked_alarm; 65 unsigned int zynq_intmask; 66 struct delayed_work zynq_unmask_work; 67 68 struct mutex mutex; 69 spinlock_t lock; 70 71 struct completion completion; 72 }; 73 74 struct xadc_ops { 75 int (*read)(struct xadc *, unsigned int, uint16_t *); 76 int (*write)(struct xadc *, unsigned int, uint16_t); 77 int (*setup)(struct platform_device *pdev, struct iio_dev *indio_dev, 78 int irq); 79 void (*update_alarm)(struct xadc *, unsigned int); 80 unsigned long (*get_dclk_rate)(struct xadc *); 81 irqreturn_t (*interrupt_handler)(int, void *); 82 irqreturn_t (*threaded_interrupt_handler)(int, void *); 83 84 unsigned int flags; 85 }; 86 87 static inline int _xadc_read_adc_reg(struct xadc *xadc, unsigned int reg, 88 uint16_t *val) 89 { 90 lockdep_assert_held(&xadc->mutex); 91 return xadc->ops->read(xadc, reg, val); 92 } 93 94 static inline int _xadc_write_adc_reg(struct xadc *xadc, unsigned int reg, 95 uint16_t val) 96 { 97 lockdep_assert_held(&xadc->mutex); 98 return xadc->ops->write(xadc, reg, val); 99 } 100 101 static inline int xadc_read_adc_reg(struct xadc *xadc, unsigned int reg, 102 uint16_t *val) 103 { 104 int ret; 105 106 mutex_lock(&xadc->mutex); 107 ret = _xadc_read_adc_reg(xadc, reg, val); 108 mutex_unlock(&xadc->mutex); 109 return ret; 110 } 111 112 static inline int xadc_write_adc_reg(struct xadc *xadc, unsigned int reg, 113 uint16_t val) 114 { 115 int ret; 116 117 mutex_lock(&xadc->mutex); 118 ret = _xadc_write_adc_reg(xadc, reg, val); 119 mutex_unlock(&xadc->mutex); 120 return ret; 121 } 122 123 /* XADC hardmacro register definitions */ 124 #define XADC_REG_TEMP 0x00 125 #define XADC_REG_VCCINT 0x01 126 #define XADC_REG_VCCAUX 0x02 127 #define XADC_REG_VPVN 0x03 128 #define XADC_REG_VREFP 0x04 129 #define XADC_REG_VREFN 0x05 130 #define XADC_REG_VCCBRAM 0x06 131 132 #define XADC_REG_VCCPINT 0x0d 133 #define XADC_REG_VCCPAUX 0x0e 134 #define XADC_REG_VCCO_DDR 0x0f 135 #define XADC_REG_VAUX(x) (0x10 + (x)) 136 137 #define XADC_REG_MAX_TEMP 0x20 138 #define XADC_REG_MAX_VCCINT 0x21 139 #define XADC_REG_MAX_VCCAUX 0x22 140 #define XADC_REG_MAX_VCCBRAM 0x23 141 #define XADC_REG_MIN_TEMP 0x24 142 #define XADC_REG_MIN_VCCINT 0x25 143 #define XADC_REG_MIN_VCCAUX 0x26 144 #define XADC_REG_MIN_VCCBRAM 0x27 145 #define XADC_REG_MAX_VCCPINT 0x28 146 #define XADC_REG_MAX_VCCPAUX 0x29 147 #define XADC_REG_MAX_VCCO_DDR 0x2a 148 #define XADC_REG_MIN_VCCPINT 0x2c 149 #define XADC_REG_MIN_VCCPAUX 0x2d 150 #define XADC_REG_MIN_VCCO_DDR 0x2e 151 152 #define XADC_REG_CONF0 0x40 153 #define XADC_REG_CONF1 0x41 154 #define XADC_REG_CONF2 0x42 155 #define XADC_REG_SEQ(x) (0x48 + (x)) 156 #define XADC_REG_INPUT_MODE(x) (0x4c + (x)) 157 #define XADC_REG_THRESHOLD(x) (0x50 + (x)) 158 159 #define XADC_REG_FLAG 0x3f 160 161 #define XADC_CONF0_EC BIT(9) 162 #define XADC_CONF0_ACQ BIT(8) 163 #define XADC_CONF0_MUX BIT(11) 164 #define XADC_CONF0_CHAN(x) (x) 165 166 #define XADC_CONF1_SEQ_MASK (0xf << 12) 167 #define XADC_CONF1_SEQ_DEFAULT (0 << 12) 168 #define XADC_CONF1_SEQ_SINGLE_PASS (1 << 12) 169 #define XADC_CONF1_SEQ_CONTINUOUS (2 << 12) 170 #define XADC_CONF1_SEQ_SINGLE_CHANNEL (3 << 12) 171 #define XADC_CONF1_SEQ_SIMULTANEOUS (4 << 12) 172 #define XADC_CONF1_SEQ_INDEPENDENT (8 << 12) 173 #define XADC_CONF1_ALARM_MASK 0x0f0f 174 175 #define XADC_CONF2_DIV_MASK 0xff00 176 #define XADC_CONF2_DIV_OFFSET 8 177 178 #define XADC_CONF2_PD_MASK (0x3 << 4) 179 #define XADC_CONF2_PD_NONE (0x0 << 4) 180 #define XADC_CONF2_PD_ADC_B (0x2 << 4) 181 #define XADC_CONF2_PD_BOTH (0x3 << 4) 182 183 #define XADC_ALARM_TEMP_MASK BIT(0) 184 #define XADC_ALARM_VCCINT_MASK BIT(1) 185 #define XADC_ALARM_VCCAUX_MASK BIT(2) 186 #define XADC_ALARM_OT_MASK BIT(3) 187 #define XADC_ALARM_VCCBRAM_MASK BIT(4) 188 #define XADC_ALARM_VCCPINT_MASK BIT(5) 189 #define XADC_ALARM_VCCPAUX_MASK BIT(6) 190 #define XADC_ALARM_VCCODDR_MASK BIT(7) 191 192 #define XADC_THRESHOLD_TEMP_MAX 0x0 193 #define XADC_THRESHOLD_VCCINT_MAX 0x1 194 #define XADC_THRESHOLD_VCCAUX_MAX 0x2 195 #define XADC_THRESHOLD_OT_MAX 0x3 196 #define XADC_THRESHOLD_TEMP_MIN 0x4 197 #define XADC_THRESHOLD_VCCINT_MIN 0x5 198 #define XADC_THRESHOLD_VCCAUX_MIN 0x6 199 #define XADC_THRESHOLD_OT_MIN 0x7 200 #define XADC_THRESHOLD_VCCBRAM_MAX 0x8 201 #define XADC_THRESHOLD_VCCPINT_MAX 0x9 202 #define XADC_THRESHOLD_VCCPAUX_MAX 0xa 203 #define XADC_THRESHOLD_VCCODDR_MAX 0xb 204 #define XADC_THRESHOLD_VCCBRAM_MIN 0xc 205 #define XADC_THRESHOLD_VCCPINT_MIN 0xd 206 #define XADC_THRESHOLD_VCCPAUX_MIN 0xe 207 #define XADC_THRESHOLD_VCCODDR_MIN 0xf 208 209 #endif 210