Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * AD5446 SPI DAC driver |
| 3 | * |
| 4 | * Copyright 2010 Analog Devices Inc. |
| 5 | * |
| 6 | * Licensed under the GPL-2 or later. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/interrupt.h> |
| 10 | #include <linux/workqueue.h> |
| 11 | #include <linux/device.h> |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/slab.h> |
| 14 | #include <linux/sysfs.h> |
| 15 | #include <linux/list.h> |
| 16 | #include <linux/spi/spi.h> |
| 17 | #include <linux/regulator/consumer.h> |
| 18 | #include <linux/err.h> |
Paul Gortmaker | 99c9785 | 2011-07-03 15:49:50 -0400 | [diff] [blame] | 19 | #include <linux/module.h> |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 20 | |
| 21 | #include "../iio.h" |
| 22 | #include "../sysfs.h" |
| 23 | #include "dac.h" |
| 24 | |
| 25 | #include "ad5446.h" |
| 26 | |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 27 | static void ad5446_store_sample(struct ad5446_state *st, unsigned val) |
| 28 | { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 29 | st->data.d16 = cpu_to_be16(AD5446_LOAD | val); |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 30 | } |
| 31 | |
| 32 | static void ad5542_store_sample(struct ad5446_state *st, unsigned val) |
| 33 | { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 34 | st->data.d16 = cpu_to_be16(val); |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 35 | } |
| 36 | |
| 37 | static void ad5620_store_sample(struct ad5446_state *st, unsigned val) |
| 38 | { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 39 | st->data.d16 = cpu_to_be16(AD5620_LOAD | val); |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 40 | } |
| 41 | |
| 42 | static void ad5660_store_sample(struct ad5446_state *st, unsigned val) |
| 43 | { |
| 44 | val |= AD5660_LOAD; |
| 45 | st->data.d24[0] = (val >> 16) & 0xFF; |
| 46 | st->data.d24[1] = (val >> 8) & 0xFF; |
| 47 | st->data.d24[2] = val & 0xFF; |
| 48 | } |
| 49 | |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 50 | static void ad5620_store_pwr_down(struct ad5446_state *st, unsigned mode) |
| 51 | { |
| 52 | st->data.d16 = cpu_to_be16(mode << 14); |
| 53 | } |
| 54 | |
| 55 | static void ad5660_store_pwr_down(struct ad5446_state *st, unsigned mode) |
| 56 | { |
| 57 | unsigned val = mode << 16; |
| 58 | |
| 59 | st->data.d24[0] = (val >> 16) & 0xFF; |
| 60 | st->data.d24[1] = (val >> 8) & 0xFF; |
| 61 | st->data.d24[2] = val & 0xFF; |
| 62 | } |
| 63 | |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 64 | static ssize_t ad5446_write_powerdown_mode(struct device *dev, |
| 65 | struct device_attribute *attr, |
| 66 | const char *buf, size_t len) |
| 67 | { |
Jonathan Cameron | 638e59f | 2011-10-06 17:14:38 +0100 | [diff] [blame] | 68 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 69 | struct ad5446_state *st = iio_priv(indio_dev); |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 70 | |
| 71 | if (sysfs_streq(buf, "1kohm_to_gnd")) |
| 72 | st->pwr_down_mode = MODE_PWRDWN_1k; |
| 73 | else if (sysfs_streq(buf, "100kohm_to_gnd")) |
| 74 | st->pwr_down_mode = MODE_PWRDWN_100k; |
| 75 | else if (sysfs_streq(buf, "three_state")) |
| 76 | st->pwr_down_mode = MODE_PWRDWN_TRISTATE; |
| 77 | else |
| 78 | return -EINVAL; |
| 79 | |
| 80 | return len; |
| 81 | } |
| 82 | |
| 83 | static ssize_t ad5446_read_powerdown_mode(struct device *dev, |
| 84 | struct device_attribute *attr, char *buf) |
| 85 | { |
Jonathan Cameron | 638e59f | 2011-10-06 17:14:38 +0100 | [diff] [blame] | 86 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 87 | struct ad5446_state *st = iio_priv(indio_dev); |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 88 | |
| 89 | char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"}; |
| 90 | |
| 91 | return sprintf(buf, "%s\n", mode[st->pwr_down_mode]); |
| 92 | } |
| 93 | |
| 94 | static ssize_t ad5446_read_dac_powerdown(struct device *dev, |
| 95 | struct device_attribute *attr, |
| 96 | char *buf) |
| 97 | { |
Jonathan Cameron | 638e59f | 2011-10-06 17:14:38 +0100 | [diff] [blame] | 98 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 99 | struct ad5446_state *st = iio_priv(indio_dev); |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 100 | |
| 101 | return sprintf(buf, "%d\n", st->pwr_down); |
| 102 | } |
| 103 | |
| 104 | static ssize_t ad5446_write_dac_powerdown(struct device *dev, |
| 105 | struct device_attribute *attr, |
| 106 | const char *buf, size_t len) |
| 107 | { |
Jonathan Cameron | 638e59f | 2011-10-06 17:14:38 +0100 | [diff] [blame] | 108 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 109 | struct ad5446_state *st = iio_priv(indio_dev); |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 110 | unsigned long readin; |
| 111 | int ret; |
| 112 | |
| 113 | ret = strict_strtol(buf, 10, &readin); |
| 114 | if (ret) |
| 115 | return ret; |
| 116 | |
| 117 | if (readin > 1) |
| 118 | ret = -EINVAL; |
| 119 | |
Jonathan Cameron | 638e59f | 2011-10-06 17:14:38 +0100 | [diff] [blame] | 120 | mutex_lock(&indio_dev->mlock); |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 121 | st->pwr_down = readin; |
| 122 | |
| 123 | if (st->pwr_down) |
| 124 | st->chip_info->store_pwr_down(st, st->pwr_down_mode); |
| 125 | else |
| 126 | st->chip_info->store_sample(st, st->cached_val); |
| 127 | |
| 128 | ret = spi_sync(st->spi, &st->msg); |
Jonathan Cameron | 638e59f | 2011-10-06 17:14:38 +0100 | [diff] [blame] | 129 | mutex_unlock(&indio_dev->mlock); |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 130 | |
| 131 | return ret ? ret : len; |
| 132 | } |
| 133 | |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 134 | static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO | S_IWUSR, |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 135 | ad5446_read_powerdown_mode, |
| 136 | ad5446_write_powerdown_mode, 0); |
| 137 | |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 138 | static IIO_CONST_ATTR(out_voltage_powerdown_mode_available, |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 139 | "1kohm_to_gnd 100kohm_to_gnd three_state"); |
| 140 | |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 141 | static IIO_DEVICE_ATTR(out_voltage0_powerdown, S_IRUGO | S_IWUSR, |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 142 | ad5446_read_dac_powerdown, |
| 143 | ad5446_write_dac_powerdown, 0); |
| 144 | |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 145 | static struct attribute *ad5446_attributes[] = { |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 146 | &iio_dev_attr_out_voltage0_powerdown.dev_attr.attr, |
| 147 | &iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr, |
| 148 | &iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr, |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 149 | NULL, |
| 150 | }; |
| 151 | |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 152 | static mode_t ad5446_attr_is_visible(struct kobject *kobj, |
| 153 | struct attribute *attr, int n) |
| 154 | { |
| 155 | struct device *dev = container_of(kobj, struct device, kobj); |
Jonathan Cameron | 638e59f | 2011-10-06 17:14:38 +0100 | [diff] [blame] | 156 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 157 | struct ad5446_state *st = iio_priv(indio_dev); |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 158 | |
| 159 | mode_t mode = attr->mode; |
| 160 | |
| 161 | if (!st->chip_info->store_pwr_down && |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 162 | (attr == &iio_dev_attr_out_voltage0_powerdown.dev_attr.attr || |
| 163 | attr == &iio_dev_attr_out_voltage_powerdown_mode. |
| 164 | dev_attr.attr || |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 165 | attr == |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 166 | &iio_const_attr_out_voltage_powerdown_mode_available. |
| 167 | dev_attr.attr)) |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 168 | mode = 0; |
| 169 | |
| 170 | return mode; |
| 171 | } |
| 172 | |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 173 | static const struct attribute_group ad5446_attribute_group = { |
| 174 | .attrs = ad5446_attributes, |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 175 | .is_visible = ad5446_attr_is_visible, |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 176 | }; |
| 177 | |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 178 | #define AD5446_CHANNEL(bits, storage, shift) { \ |
| 179 | .type = IIO_VOLTAGE, \ |
| 180 | .indexed = 1, \ |
| 181 | .output = 1, \ |
| 182 | .channel = 0, \ |
| 183 | .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \ |
| 184 | .scan_type = IIO_ST('u', (bits), (storage), (shift)) \ |
| 185 | } |
| 186 | |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 187 | static const struct ad5446_chip_info ad5446_chip_info_tbl[] = { |
| 188 | [ID_AD5444] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 189 | .channel = AD5446_CHANNEL(12, 16, 2), |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 190 | .store_sample = ad5446_store_sample, |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 191 | }, |
| 192 | [ID_AD5446] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 193 | .channel = AD5446_CHANNEL(14, 16, 0), |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 194 | .store_sample = ad5446_store_sample, |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 195 | }, |
Michael Hennerich | 67d1c1f | 2011-04-15 13:51:07 +0200 | [diff] [blame] | 196 | [ID_AD5541A] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 197 | .channel = AD5446_CHANNEL(16, 16, 0), |
Michael Hennerich | 67d1c1f | 2011-04-15 13:51:07 +0200 | [diff] [blame] | 198 | .store_sample = ad5542_store_sample, |
| 199 | }, |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 200 | [ID_AD5542A] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 201 | .channel = AD5446_CHANNEL(16, 16, 0), |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 202 | .store_sample = ad5542_store_sample, |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 203 | }, |
Michael Hennerich | 0772268 | 2011-02-23 10:45:47 +0100 | [diff] [blame] | 204 | [ID_AD5543] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 205 | .channel = AD5446_CHANNEL(16, 16, 0), |
Michael Hennerich | 0772268 | 2011-02-23 10:45:47 +0100 | [diff] [blame] | 206 | .store_sample = ad5542_store_sample, |
| 207 | }, |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 208 | [ID_AD5512A] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 209 | .channel = AD5446_CHANNEL(12, 16, 4), |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 210 | .store_sample = ad5542_store_sample, |
| 211 | }, |
Michael Hennerich | 0772268 | 2011-02-23 10:45:47 +0100 | [diff] [blame] | 212 | [ID_AD5553] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 213 | .channel = AD5446_CHANNEL(14, 16, 0), |
Michael Hennerich | 0772268 | 2011-02-23 10:45:47 +0100 | [diff] [blame] | 214 | .store_sample = ad5542_store_sample, |
| 215 | }, |
Michael Hennerich | 2b61535 | 2011-03-10 13:26:48 +0100 | [diff] [blame] | 216 | [ID_AD5601] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 217 | .channel = AD5446_CHANNEL(8, 16, 6), |
Michael Hennerich | 2b61535 | 2011-03-10 13:26:48 +0100 | [diff] [blame] | 218 | .store_sample = ad5542_store_sample, |
| 219 | .store_pwr_down = ad5620_store_pwr_down, |
| 220 | }, |
| 221 | [ID_AD5611] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 222 | .channel = AD5446_CHANNEL(10, 16, 4), |
Michael Hennerich | 2b61535 | 2011-03-10 13:26:48 +0100 | [diff] [blame] | 223 | .store_sample = ad5542_store_sample, |
| 224 | .store_pwr_down = ad5620_store_pwr_down, |
| 225 | }, |
| 226 | [ID_AD5621] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 227 | .channel = AD5446_CHANNEL(12, 16, 2), |
Michael Hennerich | 2b61535 | 2011-03-10 13:26:48 +0100 | [diff] [blame] | 228 | .store_sample = ad5542_store_sample, |
| 229 | .store_pwr_down = ad5620_store_pwr_down, |
| 230 | }, |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 231 | [ID_AD5620_2500] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 232 | .channel = AD5446_CHANNEL(12, 16, 2), |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 233 | .int_vref_mv = 2500, |
| 234 | .store_sample = ad5620_store_sample, |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 235 | .store_pwr_down = ad5620_store_pwr_down, |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 236 | }, |
| 237 | [ID_AD5620_1250] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 238 | .channel = AD5446_CHANNEL(12, 16, 2), |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 239 | .int_vref_mv = 1250, |
| 240 | .store_sample = ad5620_store_sample, |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 241 | .store_pwr_down = ad5620_store_pwr_down, |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 242 | }, |
| 243 | [ID_AD5640_2500] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 244 | .channel = AD5446_CHANNEL(14, 16, 0), |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 245 | .int_vref_mv = 2500, |
| 246 | .store_sample = ad5620_store_sample, |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 247 | .store_pwr_down = ad5620_store_pwr_down, |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 248 | }, |
| 249 | [ID_AD5640_1250] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 250 | .channel = AD5446_CHANNEL(14, 16, 0), |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 251 | .int_vref_mv = 1250, |
| 252 | .store_sample = ad5620_store_sample, |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 253 | .store_pwr_down = ad5620_store_pwr_down, |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 254 | }, |
| 255 | [ID_AD5660_2500] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 256 | .channel = AD5446_CHANNEL(16, 16, 0), |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 257 | .int_vref_mv = 2500, |
| 258 | .store_sample = ad5660_store_sample, |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 259 | .store_pwr_down = ad5660_store_pwr_down, |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 260 | }, |
| 261 | [ID_AD5660_1250] = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 262 | .channel = AD5446_CHANNEL(16, 16, 0), |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 263 | .int_vref_mv = 1250, |
| 264 | .store_sample = ad5660_store_sample, |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 265 | .store_pwr_down = ad5660_store_pwr_down, |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 266 | }, |
| 267 | }; |
| 268 | |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 269 | static int ad5446_read_raw(struct iio_dev *indio_dev, |
| 270 | struct iio_chan_spec const *chan, |
| 271 | int *val, |
| 272 | int *val2, |
| 273 | long m) |
| 274 | { |
| 275 | struct ad5446_state *st = iio_priv(indio_dev); |
| 276 | unsigned long scale_uv; |
| 277 | |
| 278 | switch (m) { |
| 279 | case IIO_CHAN_INFO_SCALE: |
| 280 | scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits; |
| 281 | *val = scale_uv / 1000; |
| 282 | *val2 = (scale_uv % 1000) * 1000; |
| 283 | return IIO_VAL_INT_PLUS_MICRO; |
| 284 | |
| 285 | } |
| 286 | return -EINVAL; |
| 287 | } |
| 288 | |
| 289 | static int ad5446_write_raw(struct iio_dev *indio_dev, |
| 290 | struct iio_chan_spec const *chan, |
| 291 | int val, |
| 292 | int val2, |
| 293 | long mask) |
| 294 | { |
| 295 | struct ad5446_state *st = iio_priv(indio_dev); |
| 296 | int ret; |
| 297 | |
| 298 | switch (mask) { |
| 299 | case 0: |
| 300 | if (val >= (1 << chan->scan_type.realbits) || val < 0) |
| 301 | return -EINVAL; |
| 302 | |
| 303 | val <<= chan->scan_type.shift; |
| 304 | mutex_lock(&indio_dev->mlock); |
| 305 | st->cached_val = val; |
| 306 | st->chip_info->store_sample(st, val); |
| 307 | ret = spi_sync(st->spi, &st->msg); |
| 308 | mutex_unlock(&indio_dev->mlock); |
| 309 | break; |
| 310 | default: |
| 311 | ret = -EINVAL; |
| 312 | } |
| 313 | |
| 314 | return ret; |
| 315 | } |
| 316 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 317 | static const struct iio_info ad5446_info = { |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 318 | .read_raw = ad5446_read_raw, |
| 319 | .write_raw = ad5446_write_raw, |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 320 | .attrs = &ad5446_attribute_group, |
| 321 | .driver_module = THIS_MODULE, |
| 322 | }; |
| 323 | |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 324 | static int __devinit ad5446_probe(struct spi_device *spi) |
| 325 | { |
| 326 | struct ad5446_state *st; |
Jonathan Cameron | 86729fc | 2011-06-27 13:07:33 +0100 | [diff] [blame] | 327 | struct iio_dev *indio_dev; |
| 328 | struct regulator *reg; |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 329 | int ret, voltage_uv = 0; |
| 330 | |
Jonathan Cameron | 86729fc | 2011-06-27 13:07:33 +0100 | [diff] [blame] | 331 | reg = regulator_get(&spi->dev, "vcc"); |
| 332 | if (!IS_ERR(reg)) { |
| 333 | ret = regulator_enable(reg); |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 334 | if (ret) |
| 335 | goto error_put_reg; |
| 336 | |
Jonathan Cameron | 86729fc | 2011-06-27 13:07:33 +0100 | [diff] [blame] | 337 | voltage_uv = regulator_get_voltage(reg); |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 338 | } |
| 339 | |
Jonathan Cameron | 86729fc | 2011-06-27 13:07:33 +0100 | [diff] [blame] | 340 | indio_dev = iio_allocate_device(sizeof(*st)); |
| 341 | if (indio_dev == NULL) { |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 342 | ret = -ENOMEM; |
| 343 | goto error_disable_reg; |
| 344 | } |
Jonathan Cameron | 86729fc | 2011-06-27 13:07:33 +0100 | [diff] [blame] | 345 | st = iio_priv(indio_dev); |
| 346 | st->chip_info = |
| 347 | &ad5446_chip_info_tbl[spi_get_device_id(spi)->driver_data]; |
| 348 | |
| 349 | spi_set_drvdata(spi, indio_dev); |
| 350 | st->reg = reg; |
| 351 | st->spi = spi; |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 352 | |
| 353 | /* Estabilish that the iio_dev is a child of the spi device */ |
Jonathan Cameron | 86729fc | 2011-06-27 13:07:33 +0100 | [diff] [blame] | 354 | indio_dev->dev.parent = &spi->dev; |
| 355 | indio_dev->name = spi_get_device_id(spi)->name; |
| 356 | indio_dev->info = &ad5446_info; |
| 357 | indio_dev->modes = INDIO_DIRECT_MODE; |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 358 | indio_dev->channels = &st->chip_info->channel; |
| 359 | indio_dev->num_channels = 1; |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 360 | |
| 361 | /* Setup default message */ |
| 362 | |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 363 | st->xfer.tx_buf = &st->data; |
Lars-Peter Clausen | 33ad6b2 | 2011-11-15 16:31:22 +0100 | [diff] [blame^] | 364 | st->xfer.len = st->chip_info->channel.scan_type.storagebits / 8; |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 365 | |
| 366 | spi_message_init(&st->msg); |
| 367 | spi_message_add_tail(&st->xfer, &st->msg); |
| 368 | |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 369 | switch (spi_get_device_id(spi)->driver_data) { |
Michael Hennerich | bbed4dc | 2011-03-10 13:26:47 +0100 | [diff] [blame] | 370 | case ID_AD5620_2500: |
| 371 | case ID_AD5620_1250: |
| 372 | case ID_AD5640_2500: |
| 373 | case ID_AD5640_1250: |
| 374 | case ID_AD5660_2500: |
| 375 | case ID_AD5660_1250: |
| 376 | st->vref_mv = st->chip_info->int_vref_mv; |
| 377 | break; |
| 378 | default: |
| 379 | if (voltage_uv) |
| 380 | st->vref_mv = voltage_uv / 1000; |
| 381 | else |
| 382 | dev_warn(&spi->dev, |
| 383 | "reference voltage unspecified\n"); |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 384 | } |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 385 | |
Jonathan Cameron | 86729fc | 2011-06-27 13:07:33 +0100 | [diff] [blame] | 386 | ret = iio_device_register(indio_dev); |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 387 | if (ret) |
| 388 | goto error_free_device; |
| 389 | |
| 390 | return 0; |
| 391 | |
| 392 | error_free_device: |
Jonathan Cameron | 86729fc | 2011-06-27 13:07:33 +0100 | [diff] [blame] | 393 | iio_free_device(indio_dev); |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 394 | error_disable_reg: |
Jonathan Cameron | 86729fc | 2011-06-27 13:07:33 +0100 | [diff] [blame] | 395 | if (!IS_ERR(reg)) |
| 396 | regulator_disable(reg); |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 397 | error_put_reg: |
Jonathan Cameron | 86729fc | 2011-06-27 13:07:33 +0100 | [diff] [blame] | 398 | if (!IS_ERR(reg)) |
| 399 | regulator_put(reg); |
| 400 | |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 401 | return ret; |
| 402 | } |
| 403 | |
| 404 | static int ad5446_remove(struct spi_device *spi) |
| 405 | { |
Jonathan Cameron | 86729fc | 2011-06-27 13:07:33 +0100 | [diff] [blame] | 406 | struct iio_dev *indio_dev = spi_get_drvdata(spi); |
| 407 | struct ad5446_state *st = iio_priv(indio_dev); |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 408 | |
| 409 | iio_device_unregister(indio_dev); |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 410 | if (!IS_ERR(st->reg)) { |
| 411 | regulator_disable(st->reg); |
| 412 | regulator_put(st->reg); |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 413 | } |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 414 | iio_free_device(indio_dev); |
| 415 | |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 416 | return 0; |
| 417 | } |
| 418 | |
| 419 | static const struct spi_device_id ad5446_id[] = { |
| 420 | {"ad5444", ID_AD5444}, |
| 421 | {"ad5446", ID_AD5446}, |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 422 | {"ad5512a", ID_AD5512A}, |
Michael Hennerich | 67d1c1f | 2011-04-15 13:51:07 +0200 | [diff] [blame] | 423 | {"ad5541a", ID_AD5541A}, |
Michael Hennerich | bd51c0b | 2011-03-10 13:26:46 +0100 | [diff] [blame] | 424 | {"ad5542a", ID_AD5542A}, |
| 425 | {"ad5543", ID_AD5543}, |
| 426 | {"ad5553", ID_AD5553}, |
Michael Hennerich | 2b61535 | 2011-03-10 13:26:48 +0100 | [diff] [blame] | 427 | {"ad5601", ID_AD5601}, |
| 428 | {"ad5611", ID_AD5611}, |
| 429 | {"ad5621", ID_AD5621}, |
Michael Hennerich | d846263 | 2010-11-23 11:14:16 +0100 | [diff] [blame] | 430 | {"ad5620-2500", ID_AD5620_2500}, /* AD5620/40/60: */ |
| 431 | {"ad5620-1250", ID_AD5620_1250}, /* part numbers may look differently */ |
| 432 | {"ad5640-2500", ID_AD5640_2500}, |
| 433 | {"ad5640-1250", ID_AD5640_1250}, |
| 434 | {"ad5660-2500", ID_AD5660_2500}, |
| 435 | {"ad5660-1250", ID_AD5660_1250}, |
Michael Hennerich | b5a4948 | 2010-11-22 11:15:23 +0100 | [diff] [blame] | 436 | {} |
| 437 | }; |
| 438 | |
| 439 | static struct spi_driver ad5446_driver = { |
| 440 | .driver = { |
| 441 | .name = "ad5446", |
| 442 | .bus = &spi_bus_type, |
| 443 | .owner = THIS_MODULE, |
| 444 | }, |
| 445 | .probe = ad5446_probe, |
| 446 | .remove = __devexit_p(ad5446_remove), |
| 447 | .id_table = ad5446_id, |
| 448 | }; |
| 449 | |
| 450 | static int __init ad5446_init(void) |
| 451 | { |
| 452 | return spi_register_driver(&ad5446_driver); |
| 453 | } |
| 454 | module_init(ad5446_init); |
| 455 | |
| 456 | static void __exit ad5446_exit(void) |
| 457 | { |
| 458 | spi_unregister_driver(&ad5446_driver); |
| 459 | } |
| 460 | module_exit(ad5446_exit); |
| 461 | |
| 462 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); |
| 463 | MODULE_DESCRIPTION("Analog Devices AD5444/AD5446 DAC"); |
| 464 | MODULE_LICENSE("GPL v2"); |
| 465 | MODULE_ALIAS("spi:ad5446"); |